--- /dev/null
+From adee2a81f0be488e079498ac457bf01c954a029e Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Tue, 2 Jul 2013 23:42:01 +0100
+Subject: [PATCH 010/114] bcm2708 vchiq driver
+
+Signed-off-by: popcornmix <popcornmix@gmail.com>
+
+vchiq: create_pagelist copes with vmalloc memory
+
+Signed-off-by: Daniel Stone <daniels@collabora.com>
+
+vchiq: fix the shim message release
+
+Signed-off-by: Daniel Stone <daniels@collabora.com>
+
+vchiq: export additional symbols
+
+Signed-off-by: Daniel Stone <daniels@collabora.com>
+
+VCHIQ: Make service closure fully synchronous (drv)
+
+This is one half of a two-part patch, the other half of which is to
+the vchiq_lib user library. With these patches, calls to
+vchiq_close_service and vchiq_remove_service won't return until any
+associated callbacks have been delivered to the callback thread.
+
+VCHIQ: Add per-service tracing
+
+The new service option VCHIQ_SERVICE_OPTION_TRACE is a boolean that
+toggles tracing for the specified service.
+
+This commit also introduces vchi_service_set_option and the associated
+option VCHI_SERVICE_OPTION_TRACE.
+
+vchiq: Make the synchronous-CLOSE logic more tolerant
+
+vchiq: Move logging control into debugfs
+
+vchiq: Take care of a corner case tickled by VCSM
+
+Closing a connection that isn't fully open requires care, since one
+side does not know the other side's port number. Code was present to
+handle the case where a CLOSE is sent immediately after an OPEN, i.e.
+before the OPENACK has been received, but this was incorrectly being
+used when an OPEN from a client using port 0 was rejected.
+
+(In the observed failure, the host was attempting to use the VCSM
+service, which isn't present in the 'cutdown' firmware. The failure
+was intermittent because sometimes the keepalive service would
+grab port 0.)
+
+This case can be distinguished because the client's remoteport will
+still be VCHIQ_PORT_FREE, and the srvstate will be OPENING. Either
+condition is sufficient to differentiate it from the special case
+described above.
+---
+ drivers/misc/Kconfig | 1 +
+ drivers/misc/Makefile | 1 +
+ drivers/misc/vc04_services/Kconfig | 9 +
+ drivers/misc/vc04_services/Makefile | 17 +
+ .../interface/vchi/connections/connection.h | 328 ++
+ .../interface/vchi/message_drivers/message.h | 204 ++
+ drivers/misc/vc04_services/interface/vchi/vchi.h | 378 ++
+ .../misc/vc04_services/interface/vchi/vchi_cfg.h | 224 ++
+ .../interface/vchi/vchi_cfg_internal.h | 71 +
+ .../vc04_services/interface/vchi/vchi_common.h | 174 +
+ .../misc/vc04_services/interface/vchi/vchi_mh.h | 42 +
+ .../misc/vc04_services/interface/vchiq_arm/vchiq.h | 40 +
+ .../vc04_services/interface/vchiq_arm/vchiq_2835.h | 42 +
+ .../interface/vchiq_arm/vchiq_2835_arm.c | 561 +++
+ .../vc04_services/interface/vchiq_arm/vchiq_arm.c | 2883 +++++++++++++++
+ .../vc04_services/interface/vchiq_arm/vchiq_arm.h | 223 ++
+ .../interface/vchiq_arm/vchiq_build_info.h | 37 +
+ .../vc04_services/interface/vchiq_arm/vchiq_cfg.h | 66 +
+ .../interface/vchiq_arm/vchiq_connected.c | 119 +
+ .../interface/vchiq_arm/vchiq_connected.h | 50 +
+ .../vc04_services/interface/vchiq_arm/vchiq_core.c | 3861 ++++++++++++++++++++
+ .../vc04_services/interface/vchiq_arm/vchiq_core.h | 711 ++++
+ .../interface/vchiq_arm/vchiq_debugfs.c | 383 ++
+ .../interface/vchiq_arm/vchiq_debugfs.h | 52 +
+ .../interface/vchiq_arm/vchiq_genversion | 87 +
+ .../vc04_services/interface/vchiq_arm/vchiq_if.h | 189 +
+ .../interface/vchiq_arm/vchiq_ioctl.h | 131 +
+ .../interface/vchiq_arm/vchiq_kern_lib.c | 456 +++
+ .../interface/vchiq_arm/vchiq_memdrv.h | 71 +
+ .../interface/vchiq_arm/vchiq_pagelist.h | 58 +
+ .../vc04_services/interface/vchiq_arm/vchiq_shim.c | 853 +++++
+ .../vc04_services/interface/vchiq_arm/vchiq_util.c | 151 +
+ .../vc04_services/interface/vchiq_arm/vchiq_util.h | 81 +
+ .../interface/vchiq_arm/vchiq_version.c | 59 +
+ 34 files changed, 12613 insertions(+)
+ create mode 100644 drivers/misc/vc04_services/Kconfig
+ create mode 100644 drivers/misc/vc04_services/Makefile
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/connections/connection.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/message_drivers/message.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_cfg.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_cfg_internal.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_common.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_mh.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_build_info.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_cfg.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_genversion
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_if.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_memdrv.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_pagelist.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_shim.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.h
+ create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_version.c
+
+diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
+index bbeb451..b6109a2 100644
+--- a/drivers/misc/Kconfig
++++ b/drivers/misc/Kconfig
+@@ -524,6 +524,7 @@ source "drivers/misc/carma/Kconfig"
+ source "drivers/misc/altera-stapl/Kconfig"
+ source "drivers/misc/mei/Kconfig"
+ source "drivers/misc/vmw_vmci/Kconfig"
++source "drivers/misc/vc04_services/Kconfig"
+ source "drivers/misc/mic/Kconfig"
+ source "drivers/misc/genwqe/Kconfig"
+ source "drivers/misc/echo/Kconfig"
+diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
+index 7d5c4cd..c085ede 100644
+--- a/drivers/misc/Makefile
++++ b/drivers/misc/Makefile
+@@ -51,6 +51,7 @@ obj-$(CONFIG_INTEL_MEI) += mei/
+ obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/
+ obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o
+ obj-$(CONFIG_SRAM) += sram.o
++obj-y += vc04_services/
+ obj-y += mic/
+ obj-$(CONFIG_GENWQE) += genwqe/
+ obj-$(CONFIG_ECHO) += echo/
+diff --git a/drivers/misc/vc04_services/Kconfig b/drivers/misc/vc04_services/Kconfig
+new file mode 100644
+index 0000000..2663933
+--- /dev/null
++++ b/drivers/misc/vc04_services/Kconfig
+@@ -0,0 +1,9 @@
++config BCM2708_VCHIQ
++ tristate "Videocore VCHIQ"
++ depends on MACH_BCM2708
++ default y
++ help
++ Kernel to VideoCore communication interface for the
++ BCM2708 family of products.
++ Defaults to Y when the Broadcom Videocore services
++ are included in the build, N otherwise.
+diff --git a/drivers/misc/vc04_services/Makefile b/drivers/misc/vc04_services/Makefile
+new file mode 100644
+index 0000000..0c82520
+--- /dev/null
++++ b/drivers/misc/vc04_services/Makefile
+@@ -0,0 +1,17 @@
++ifeq ($(CONFIG_MACH_BCM2708),y)
++
++obj-$(CONFIG_BCM2708_VCHIQ) += vchiq.o
++
++vchiq-objs := \
++ interface/vchiq_arm/vchiq_core.o \
++ interface/vchiq_arm/vchiq_arm.o \
++ interface/vchiq_arm/vchiq_kern_lib.o \
++ interface/vchiq_arm/vchiq_2835_arm.o \
++ interface/vchiq_arm/vchiq_debugfs.o \
++ interface/vchiq_arm/vchiq_shim.o \
++ interface/vchiq_arm/vchiq_util.o \
++ interface/vchiq_arm/vchiq_connected.o \
++
++ccflags-y += -DVCOS_VERIFY_BKPTS=1 -Idrivers/misc/vc04_services -DUSE_VCHIQ_ARM -D__VCCOREVER__=0x04000000
++
++endif
+diff --git a/drivers/misc/vc04_services/interface/vchi/connections/connection.h b/drivers/misc/vc04_services/interface/vchi/connections/connection.h
+new file mode 100644
+index 0000000..fef6ac3
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/connections/connection.h
+@@ -0,0 +1,328 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef CONNECTION_H_
++#define CONNECTION_H_
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/semaphore.h>
++
++#include "interface/vchi/vchi_cfg_internal.h"
++#include "interface/vchi/vchi_common.h"
++#include "interface/vchi/message_drivers/message.h"
++
++/******************************************************************************
++ Global defs
++ *****************************************************************************/
++
++// Opaque handle for a connection / service pair
++typedef struct opaque_vchi_connection_connected_service_handle_t *VCHI_CONNECTION_SERVICE_HANDLE_T;
++
++// opaque handle to the connection state information
++typedef struct opaque_vchi_connection_info_t VCHI_CONNECTION_STATE_T;
++
++typedef struct vchi_connection_t VCHI_CONNECTION_T;
++
++
++/******************************************************************************
++ API
++ *****************************************************************************/
++
++// Routine to init a connection with a particular low level driver
++typedef VCHI_CONNECTION_STATE_T * (*VCHI_CONNECTION_INIT_T)( struct vchi_connection_t * connection,
++ const VCHI_MESSAGE_DRIVER_T * driver );
++
++// Routine to control CRC enabling at a connection level
++typedef int32_t (*VCHI_CONNECTION_CRC_CONTROL_T)( VCHI_CONNECTION_STATE_T *state_handle,
++ VCHI_CRC_CONTROL_T control );
++
++// Routine to create a service
++typedef int32_t (*VCHI_CONNECTION_SERVICE_CONNECT_T)( VCHI_CONNECTION_STATE_T *state_handle,
++ int32_t service_id,
++ uint32_t rx_fifo_size,
++ uint32_t tx_fifo_size,
++ int server,
++ VCHI_CALLBACK_T callback,
++ void *callback_param,
++ int32_t want_crc,
++ int32_t want_unaligned_bulk_rx,
++ int32_t want_unaligned_bulk_tx,
++ VCHI_CONNECTION_SERVICE_HANDLE_T *service_handle );
++
++// Routine to close a service
++typedef int32_t (*VCHI_CONNECTION_SERVICE_DISCONNECT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle );
++
++// Routine to queue a message
++typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ const void *data,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *msg_handle );
++
++// scatter-gather (vector) message queueing
++typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ VCHI_MSG_VECTOR_T *vector,
++ uint32_t count,
++ VCHI_FLAGS_T flags,
++ void *msg_handle );
++
++// Routine to dequeue a message
++typedef int32_t (*VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ void *data,
++ uint32_t max_data_size_to_read,
++ uint32_t *actual_msg_size,
++ VCHI_FLAGS_T flags );
++
++// Routine to peek at a message
++typedef int32_t (*VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ void **data,
++ uint32_t *msg_size,
++ VCHI_FLAGS_T flags );
++
++// Routine to hold a message
++typedef int32_t (*VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ void **data,
++ uint32_t *msg_size,
++ VCHI_FLAGS_T flags,
++ void **message_handle );
++
++// Routine to initialise a received message iterator
++typedef int32_t (*VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ VCHI_MSG_ITER_T *iter,
++ VCHI_FLAGS_T flags );
++
++// Routine to release a held message
++typedef int32_t (*VCHI_CONNECTION_HELD_MSG_RELEASE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ void *message_handle );
++
++// Routine to get info on a held message
++typedef int32_t (*VCHI_CONNECTION_HELD_MSG_INFO_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ void *message_handle,
++ void **data,
++ int32_t *msg_size,
++ uint32_t *tx_timestamp,
++ uint32_t *rx_timestamp );
++
++// Routine to check whether the iterator has a next message
++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
++ const VCHI_MSG_ITER_T *iter );
++
++// Routine to advance the iterator
++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
++ VCHI_MSG_ITER_T *iter,
++ void **data,
++ uint32_t *msg_size );
++
++// Routine to remove the last message returned by the iterator
++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_REMOVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
++ VCHI_MSG_ITER_T *iter );
++
++// Routine to hold the last message returned by the iterator
++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HOLD_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service,
++ VCHI_MSG_ITER_T *iter,
++ void **msg_handle );
++
++// Routine to transmit bulk data
++typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ const void *data_src,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *bulk_handle );
++
++// Routine to receive data
++typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle,
++ void *data_dst,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *bulk_handle );
++
++// Routine to report if a server is available
++typedef int32_t (*VCHI_CONNECTION_SERVER_PRESENT)( VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t peer_flags );
++
++// Routine to report the number of RX slots available
++typedef int (*VCHI_CONNECTION_RX_SLOTS_AVAILABLE)( const VCHI_CONNECTION_STATE_T *state );
++
++// Routine to report the RX slot size
++typedef uint32_t (*VCHI_CONNECTION_RX_SLOT_SIZE)( const VCHI_CONNECTION_STATE_T *state );
++
++// Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO
++typedef void (*VCHI_CONNECTION_RX_BULK_BUFFER_ADDED)(VCHI_CONNECTION_STATE_T *state,
++ int32_t service,
++ uint32_t length,
++ MESSAGE_TX_CHANNEL_T channel,
++ uint32_t channel_params,
++ uint32_t data_length,
++ uint32_t data_offset);
++
++// Callback to inform a service that a Xon or Xoff message has been received
++typedef void (*VCHI_CONNECTION_FLOW_CONTROL)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t xoff);
++
++// Callback to inform a service that a server available reply message has been received
++typedef void (*VCHI_CONNECTION_SERVER_AVAILABLE_REPLY)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, uint32_t flags);
++
++// Callback to indicate that bulk auxiliary messages have arrived
++typedef void (*VCHI_CONNECTION_BULK_AUX_RECEIVED)(VCHI_CONNECTION_STATE_T *state);
++
++// Callback to indicate that bulk auxiliary messages have arrived
++typedef void (*VCHI_CONNECTION_BULK_AUX_TRANSMITTED)(VCHI_CONNECTION_STATE_T *state, void *handle);
++
++// Callback with all the connection info you require
++typedef void (*VCHI_CONNECTION_INFO)(VCHI_CONNECTION_STATE_T *state, uint32_t protocol_version, uint32_t slot_size, uint32_t num_slots, uint32_t min_bulk_size);
++
++// Callback to inform of a disconnect
++typedef void (*VCHI_CONNECTION_DISCONNECT)(VCHI_CONNECTION_STATE_T *state, uint32_t flags);
++
++// Callback to inform of a power control request
++typedef void (*VCHI_CONNECTION_POWER_CONTROL)(VCHI_CONNECTION_STATE_T *state, MESSAGE_TX_CHANNEL_T channel, int32_t enable);
++
++// allocate memory suitably aligned for this connection
++typedef void * (*VCHI_BUFFER_ALLOCATE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, uint32_t * length);
++
++// free memory allocated by buffer_allocate
++typedef void (*VCHI_BUFFER_FREE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, void * address);
++
++
++/******************************************************************************
++ System driver struct
++ *****************************************************************************/
++
++struct opaque_vchi_connection_api_t
++{
++ // Routine to init the connection
++ VCHI_CONNECTION_INIT_T init;
++
++ // Connection-level CRC control
++ VCHI_CONNECTION_CRC_CONTROL_T crc_control;
++
++ // Routine to connect to or create service
++ VCHI_CONNECTION_SERVICE_CONNECT_T service_connect;
++
++ // Routine to disconnect from a service
++ VCHI_CONNECTION_SERVICE_DISCONNECT_T service_disconnect;
++
++ // Routine to queue a message
++ VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T service_queue_msg;
++
++ // scatter-gather (vector) message queue
++ VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T service_queue_msgv;
++
++ // Routine to dequeue a message
++ VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T service_dequeue_msg;
++
++ // Routine to peek at a message
++ VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T service_peek_msg;
++
++ // Routine to hold a message
++ VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T service_hold_msg;
++
++ // Routine to initialise a received message iterator
++ VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T service_look_ahead_msg;
++
++ // Routine to release a message
++ VCHI_CONNECTION_HELD_MSG_RELEASE_T held_msg_release;
++
++ // Routine to get information on a held message
++ VCHI_CONNECTION_HELD_MSG_INFO_T held_msg_info;
++
++ // Routine to check for next message on iterator
++ VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T msg_iter_has_next;
++
++ // Routine to get next message on iterator
++ VCHI_CONNECTION_MSG_ITER_NEXT_T msg_iter_next;
++
++ // Routine to remove the last message returned by iterator
++ VCHI_CONNECTION_MSG_ITER_REMOVE_T msg_iter_remove;
++
++ // Routine to hold the last message returned by iterator
++ VCHI_CONNECTION_MSG_ITER_HOLD_T msg_iter_hold;
++
++ // Routine to transmit bulk data
++ VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T bulk_queue_transmit;
++
++ // Routine to receive data
++ VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T bulk_queue_receive;
++
++ // Routine to report the available servers
++ VCHI_CONNECTION_SERVER_PRESENT server_present;
++
++ // Routine to report the number of RX slots available
++ VCHI_CONNECTION_RX_SLOTS_AVAILABLE connection_rx_slots_available;
++
++ // Routine to report the RX slot size
++ VCHI_CONNECTION_RX_SLOT_SIZE connection_rx_slot_size;
++
++ // Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO
++ VCHI_CONNECTION_RX_BULK_BUFFER_ADDED rx_bulk_buffer_added;
++
++ // Callback to inform a service that a Xon or Xoff message has been received
++ VCHI_CONNECTION_FLOW_CONTROL flow_control;
++
++ // Callback to inform a service that a server available reply message has been received
++ VCHI_CONNECTION_SERVER_AVAILABLE_REPLY server_available_reply;
++
++ // Callback to indicate that bulk auxiliary messages have arrived
++ VCHI_CONNECTION_BULK_AUX_RECEIVED bulk_aux_received;
++
++ // Callback to indicate that a bulk auxiliary message has been transmitted
++ VCHI_CONNECTION_BULK_AUX_TRANSMITTED bulk_aux_transmitted;
++
++ // Callback to provide information about the connection
++ VCHI_CONNECTION_INFO connection_info;
++
++ // Callback to notify that peer has requested disconnect
++ VCHI_CONNECTION_DISCONNECT disconnect;
++
++ // Callback to notify that peer has requested power change
++ VCHI_CONNECTION_POWER_CONTROL power_control;
++
++ // allocate memory suitably aligned for this connection
++ VCHI_BUFFER_ALLOCATE buffer_allocate;
++
++ // free memory allocated by buffer_allocate
++ VCHI_BUFFER_FREE buffer_free;
++
++};
++
++struct vchi_connection_t {
++ const VCHI_CONNECTION_API_T *api;
++ VCHI_CONNECTION_STATE_T *state;
++#ifdef VCHI_COARSE_LOCKING
++ struct semaphore sem;
++#endif
++};
++
++
++#endif /* CONNECTION_H_ */
++
++/****************************** End of file **********************************/
+diff --git a/drivers/misc/vc04_services/interface/vchi/message_drivers/message.h b/drivers/misc/vc04_services/interface/vchi/message_drivers/message.h
+new file mode 100644
+index 0000000..8b3f767
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/message_drivers/message.h
+@@ -0,0 +1,204 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef _VCHI_MESSAGE_H_
++#define _VCHI_MESSAGE_H_
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/semaphore.h>
++
++#include "interface/vchi/vchi_cfg_internal.h"
++#include "interface/vchi/vchi_common.h"
++
++
++typedef enum message_event_type {
++ MESSAGE_EVENT_NONE,
++ MESSAGE_EVENT_NOP,
++ MESSAGE_EVENT_MESSAGE,
++ MESSAGE_EVENT_SLOT_COMPLETE,
++ MESSAGE_EVENT_RX_BULK_PAUSED,
++ MESSAGE_EVENT_RX_BULK_COMPLETE,
++ MESSAGE_EVENT_TX_COMPLETE,
++ MESSAGE_EVENT_MSG_DISCARDED
++} MESSAGE_EVENT_TYPE_T;
++
++typedef enum vchi_msg_flags
++{
++ VCHI_MSG_FLAGS_NONE = 0x0,
++ VCHI_MSG_FLAGS_TERMINATE_DMA = 0x1
++} VCHI_MSG_FLAGS_T;
++
++typedef enum message_tx_channel
++{
++ MESSAGE_TX_CHANNEL_MESSAGE = 0,
++ MESSAGE_TX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards
++} MESSAGE_TX_CHANNEL_T;
++
++// Macros used for cycling through bulk channels
++#define MESSAGE_TX_CHANNEL_BULK_PREV(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION-1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION)
++#define MESSAGE_TX_CHANNEL_BULK_NEXT(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION)
++
++typedef enum message_rx_channel
++{
++ MESSAGE_RX_CHANNEL_MESSAGE = 0,
++ MESSAGE_RX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards
++} MESSAGE_RX_CHANNEL_T;
++
++// Message receive slot information
++typedef struct rx_msg_slot_info {
++
++ struct rx_msg_slot_info *next;
++ //struct slot_info *prev;
++#if !defined VCHI_COARSE_LOCKING
++ struct semaphore sem;
++#endif
++
++ uint8_t *addr; // base address of slot
++ uint32_t len; // length of slot in bytes
++
++ uint32_t write_ptr; // hardware causes this to advance
++ uint32_t read_ptr; // this module does the reading
++ int active; // is this slot in the hardware dma fifo?
++ uint32_t msgs_parsed; // count how many messages are in this slot
++ uint32_t msgs_released; // how many messages have been released
++ void *state; // connection state information
++ uint8_t ref_count[VCHI_MAX_SERVICES_PER_CONNECTION]; // reference count for slots held by services
++} RX_MSG_SLOTINFO_T;
++
++// The message driver no longer needs to know about the fields of RX_BULK_SLOTINFO_T - sort this out.
++// In particular, it mustn't use addr and len - they're the client buffer, but the message
++// driver will be tasked with sending the aligned core section.
++typedef struct rx_bulk_slotinfo_t {
++ struct rx_bulk_slotinfo_t *next;
++
++ struct semaphore *blocking;
++
++ // needed by DMA
++ void *addr;
++ uint32_t len;
++
++ // needed for the callback
++ void *service;
++ void *handle;
++ VCHI_FLAGS_T flags;
++} RX_BULK_SLOTINFO_T;
++
++
++/* ----------------------------------------------------------------------
++ * each connection driver will have a pool of the following struct.
++ *
++ * the pool will be managed by vchi_qman_*
++ * this means there will be multiple queues (single linked lists)
++ * a given struct message_info will be on exactly one of these queues
++ * at any one time
++ * -------------------------------------------------------------------- */
++typedef struct rx_message_info {
++
++ struct message_info *next;
++ //struct message_info *prev;
++
++ uint8_t *addr;
++ uint32_t len;
++ RX_MSG_SLOTINFO_T *slot; // points to whichever slot contains this message
++ uint32_t tx_timestamp;
++ uint32_t rx_timestamp;
++
++} RX_MESSAGE_INFO_T;
++
++typedef struct {
++ MESSAGE_EVENT_TYPE_T type;
++
++ struct {
++ // for messages
++ void *addr; // address of message
++ uint16_t slot_delta; // whether this message indicated slot delta
++ uint32_t len; // length of message
++ RX_MSG_SLOTINFO_T *slot; // slot this message is in
++ int32_t service; // service id this message is destined for
++ uint32_t tx_timestamp; // timestamp from the header
++ uint32_t rx_timestamp; // timestamp when we parsed it
++ } message;
++
++ // FIXME: cleanup slot reporting...
++ RX_MSG_SLOTINFO_T *rx_msg;
++ RX_BULK_SLOTINFO_T *rx_bulk;
++ void *tx_handle;
++ MESSAGE_TX_CHANNEL_T tx_channel;
++
++} MESSAGE_EVENT_T;
++
++
++// callbacks
++typedef void VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T( void *state );
++
++typedef struct {
++ VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T *event_callback;
++} VCHI_MESSAGE_DRIVER_OPEN_T;
++
++
++// handle to this instance of message driver (as returned by ->open)
++typedef struct opaque_mhandle_t *VCHI_MDRIVER_HANDLE_T;
++
++struct opaque_vchi_message_driver_t {
++ VCHI_MDRIVER_HANDLE_T *(*open)( VCHI_MESSAGE_DRIVER_OPEN_T *params, void *state );
++ int32_t (*suspending)( VCHI_MDRIVER_HANDLE_T *handle );
++ int32_t (*resumed)( VCHI_MDRIVER_HANDLE_T *handle );
++ int32_t (*power_control)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T, int32_t enable );
++ int32_t (*add_msg_rx_slot)( VCHI_MDRIVER_HANDLE_T *handle, RX_MSG_SLOTINFO_T *slot ); // rx message
++ int32_t (*add_bulk_rx)( VCHI_MDRIVER_HANDLE_T *handle, void *data, uint32_t len, RX_BULK_SLOTINFO_T *slot ); // rx data (bulk)
++ int32_t (*send)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel, const void *data, uint32_t len, VCHI_MSG_FLAGS_T flags, void *send_handle ); // tx (message & bulk)
++ void (*next_event)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_EVENT_T *event ); // get the next event from message_driver
++ int32_t (*enable)( VCHI_MDRIVER_HANDLE_T *handle );
++ int32_t (*form_message)( VCHI_MDRIVER_HANDLE_T *handle, int32_t service_id, VCHI_MSG_VECTOR_T *vector, uint32_t count, void
++ *address, uint32_t length_avail, uint32_t max_total_length, int32_t pad_to_fill, int32_t allow_partial );
++
++ int32_t (*update_message)( VCHI_MDRIVER_HANDLE_T *handle, void *dest, int16_t *slot_count );
++ int32_t (*buffer_aligned)( VCHI_MDRIVER_HANDLE_T *handle, int tx, int uncached, const void *address, const uint32_t length );
++ void * (*allocate_buffer)( VCHI_MDRIVER_HANDLE_T *handle, uint32_t *length );
++ void (*free_buffer)( VCHI_MDRIVER_HANDLE_T *handle, void *address );
++ int (*rx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size );
++ int (*tx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size );
++
++ int32_t (*tx_supports_terminate)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
++ uint32_t (*tx_bulk_chunk_size)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
++ int (*tx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel );
++ int (*rx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_RX_CHANNEL_T channel );
++ void (*form_bulk_aux)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel, const void *data, uint32_t len, uint32_t chunk_size, const void **aux_data, int32_t *aux_len );
++ void (*debug)( VCHI_MDRIVER_HANDLE_T *handle );
++};
++
++
++#endif // _VCHI_MESSAGE_H_
++
++/****************************** End of file ***********************************/
+diff --git a/drivers/misc/vc04_services/interface/vchi/vchi.h b/drivers/misc/vc04_services/interface/vchi/vchi.h
+new file mode 100644
+index 0000000..1b17e98
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/vchi.h
+@@ -0,0 +1,378 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHI_H_
++#define VCHI_H_
++
++#include "interface/vchi/vchi_cfg.h"
++#include "interface/vchi/vchi_common.h"
++#include "interface/vchi/connections/connection.h"
++#include "vchi_mh.h"
++
++
++/******************************************************************************
++ Global defs
++ *****************************************************************************/
++
++#define VCHI_BULK_ROUND_UP(x) ((((unsigned long)(x))+VCHI_BULK_ALIGN-1) & ~(VCHI_BULK_ALIGN-1))
++#define VCHI_BULK_ROUND_DOWN(x) (((unsigned long)(x)) & ~(VCHI_BULK_ALIGN-1))
++#define VCHI_BULK_ALIGN_NBYTES(x) (VCHI_BULK_ALIGNED(x) ? 0 : (VCHI_BULK_ALIGN - ((unsigned long)(x) & (VCHI_BULK_ALIGN-1))))
++
++#ifdef USE_VCHIQ_ARM
++#define VCHI_BULK_ALIGNED(x) 1
++#else
++#define VCHI_BULK_ALIGNED(x) (((unsigned long)(x) & (VCHI_BULK_ALIGN-1)) == 0)
++#endif
++
++struct vchi_version {
++ uint32_t version;
++ uint32_t version_min;
++};
++#define VCHI_VERSION(v_) { v_, v_ }
++#define VCHI_VERSION_EX(v_, m_) { v_, m_ }
++
++typedef enum
++{
++ VCHI_VEC_POINTER,
++ VCHI_VEC_HANDLE,
++ VCHI_VEC_LIST
++} VCHI_MSG_VECTOR_TYPE_T;
++
++typedef struct vchi_msg_vector_ex {
++
++ VCHI_MSG_VECTOR_TYPE_T type;
++ union
++ {
++ // a memory handle
++ struct
++ {
++ VCHI_MEM_HANDLE_T handle;
++ uint32_t offset;
++ int32_t vec_len;
++ } handle;
++
++ // an ordinary data pointer
++ struct
++ {
++ const void *vec_base;
++ int32_t vec_len;
++ } ptr;
++
++ // a nested vector list
++ struct
++ {
++ struct vchi_msg_vector_ex *vec;
++ uint32_t vec_len;
++ } list;
++ } u;
++} VCHI_MSG_VECTOR_EX_T;
++
++
++// Construct an entry in a msg vector for a pointer (p) of length (l)
++#define VCHI_VEC_POINTER(p,l) VCHI_VEC_POINTER, { { (VCHI_MEM_HANDLE_T)(p), (l) } }
++
++// Construct an entry in a msg vector for a message handle (h), starting at offset (o) of length (l)
++#define VCHI_VEC_HANDLE(h,o,l) VCHI_VEC_HANDLE, { { (h), (o), (l) } }
++
++// Macros to manipulate 'FOURCC' values
++#define MAKE_FOURCC(x) ((int32_t)( (x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3] ))
++#define FOURCC_TO_CHAR(x) (x >> 24) & 0xFF,(x >> 16) & 0xFF,(x >> 8) & 0xFF, x & 0xFF
++
++
++// Opaque service information
++struct opaque_vchi_service_t;
++
++// Descriptor for a held message. Allocated by client, initialised by vchi_msg_hold,
++// vchi_msg_iter_hold or vchi_msg_iter_hold_next. Fields are for internal VCHI use only.
++typedef struct
++{
++ struct opaque_vchi_service_t *service;
++ void *message;
++} VCHI_HELD_MSG_T;
++
++
++
++// structure used to provide the information needed to open a server or a client
++typedef struct {
++ struct vchi_version version;
++ int32_t service_id;
++ VCHI_CONNECTION_T *connection;
++ uint32_t rx_fifo_size;
++ uint32_t tx_fifo_size;
++ VCHI_CALLBACK_T callback;
++ void *callback_param;
++ /* client intends to receive bulk transfers of
++ odd lengths or into unaligned buffers */
++ int32_t want_unaligned_bulk_rx;
++ /* client intends to transmit bulk transfers of
++ odd lengths or out of unaligned buffers */
++ int32_t want_unaligned_bulk_tx;
++ /* client wants to check CRCs on (bulk) xfers.
++ Only needs to be set at 1 end - will do both directions. */
++ int32_t want_crc;
++} SERVICE_CREATION_T;
++
++// Opaque handle for a VCHI instance
++typedef struct opaque_vchi_instance_handle_t *VCHI_INSTANCE_T;
++
++// Opaque handle for a server or client
++typedef struct opaque_vchi_service_handle_t *VCHI_SERVICE_HANDLE_T;
++
++// Service registration & startup
++typedef void (*VCHI_SERVICE_INIT)(VCHI_INSTANCE_T initialise_instance, VCHI_CONNECTION_T **connections, uint32_t num_connections);
++
++typedef struct service_info_tag {
++ const char * const vll_filename; /* VLL to load to start this service. This is an empty string if VLL is "static" */
++ VCHI_SERVICE_INIT init; /* Service initialisation function */
++ void *vll_handle; /* VLL handle; NULL when unloaded or a "static VLL" in build */
++} SERVICE_INFO_T;
++
++/******************************************************************************
++ Global funcs - implementation is specific to which side you are on (local / remote)
++ *****************************************************************************/
++
++#ifdef __cplusplus
++extern "C" {
++#endif
++
++extern /*@observer@*/ VCHI_CONNECTION_T * vchi_create_connection( const VCHI_CONNECTION_API_T * function_table,
++ const VCHI_MESSAGE_DRIVER_T * low_level);
++
++
++// Routine used to initialise the vchi on both local + remote connections
++extern int32_t vchi_initialise( VCHI_INSTANCE_T *instance_handle );
++
++extern int32_t vchi_exit( void );
++
++extern int32_t vchi_connect( VCHI_CONNECTION_T **connections,
++ const uint32_t num_connections,
++ VCHI_INSTANCE_T instance_handle );
++
++//When this is called, ensure that all services have no data pending.
++//Bulk transfers can remain 'queued'
++extern int32_t vchi_disconnect( VCHI_INSTANCE_T instance_handle );
++
++// Global control over bulk CRC checking
++extern int32_t vchi_crc_control( VCHI_CONNECTION_T *connection,
++ VCHI_CRC_CONTROL_T control );
++
++// helper functions
++extern void * vchi_allocate_buffer(VCHI_SERVICE_HANDLE_T handle, uint32_t *length);
++extern void vchi_free_buffer(VCHI_SERVICE_HANDLE_T handle, void *address);
++extern uint32_t vchi_current_time(VCHI_INSTANCE_T instance_handle);
++
++
++/******************************************************************************
++ Global service API
++ *****************************************************************************/
++// Routine to create a named service
++extern int32_t vchi_service_create( VCHI_INSTANCE_T instance_handle,
++ SERVICE_CREATION_T *setup,
++ VCHI_SERVICE_HANDLE_T *handle );
++
++// Routine to destory a service
++extern int32_t vchi_service_destroy( const VCHI_SERVICE_HANDLE_T handle );
++
++// Routine to open a named service
++extern int32_t vchi_service_open( VCHI_INSTANCE_T instance_handle,
++ SERVICE_CREATION_T *setup,
++ VCHI_SERVICE_HANDLE_T *handle);
++
++extern int32_t vchi_get_peer_version( const VCHI_SERVICE_HANDLE_T handle,
++ short *peer_version );
++
++// Routine to close a named service
++extern int32_t vchi_service_close( const VCHI_SERVICE_HANDLE_T handle );
++
++// Routine to increment ref count on a named service
++extern int32_t vchi_service_use( const VCHI_SERVICE_HANDLE_T handle );
++
++// Routine to decrement ref count on a named service
++extern int32_t vchi_service_release( const VCHI_SERVICE_HANDLE_T handle );
++
++// Routine to set a control option for a named service
++extern int32_t vchi_service_set_option( const VCHI_SERVICE_HANDLE_T handle,
++ VCHI_SERVICE_OPTION_T option,
++ int value);
++
++// Routine to send a message across a service
++extern int32_t vchi_msg_queue( VCHI_SERVICE_HANDLE_T handle,
++ const void *data,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *msg_handle );
++
++// scatter-gather (vector) and send message
++int32_t vchi_msg_queuev_ex( VCHI_SERVICE_HANDLE_T handle,
++ VCHI_MSG_VECTOR_EX_T *vector,
++ uint32_t count,
++ VCHI_FLAGS_T flags,
++ void *msg_handle );
++
++// legacy scatter-gather (vector) and send message, only handles pointers
++int32_t vchi_msg_queuev( VCHI_SERVICE_HANDLE_T handle,
++ VCHI_MSG_VECTOR_T *vector,
++ uint32_t count,
++ VCHI_FLAGS_T flags,
++ void *msg_handle );
++
++// Routine to receive a msg from a service
++// Dequeue is equivalent to hold, copy into client buffer, release
++extern int32_t vchi_msg_dequeue( VCHI_SERVICE_HANDLE_T handle,
++ void *data,
++ uint32_t max_data_size_to_read,
++ uint32_t *actual_msg_size,
++ VCHI_FLAGS_T flags );
++
++// Routine to look at a message in place.
++// The message is not dequeued, so a subsequent call to peek or dequeue
++// will return the same message.
++extern int32_t vchi_msg_peek( VCHI_SERVICE_HANDLE_T handle,
++ void **data,
++ uint32_t *msg_size,
++ VCHI_FLAGS_T flags );
++
++// Routine to remove a message after it has been read in place with peek
++// The first message on the queue is dequeued.
++extern int32_t vchi_msg_remove( VCHI_SERVICE_HANDLE_T handle );
++
++// Routine to look at a message in place.
++// The message is dequeued, so the caller is left holding it; the descriptor is
++// filled in and must be released when the user has finished with the message.
++extern int32_t vchi_msg_hold( VCHI_SERVICE_HANDLE_T handle,
++ void **data, // } may be NULL, as info can be
++ uint32_t *msg_size, // } obtained from HELD_MSG_T
++ VCHI_FLAGS_T flags,
++ VCHI_HELD_MSG_T *message_descriptor );
++
++// Initialise an iterator to look through messages in place
++extern int32_t vchi_msg_look_ahead( VCHI_SERVICE_HANDLE_T handle,
++ VCHI_MSG_ITER_T *iter,
++ VCHI_FLAGS_T flags );
++
++/******************************************************************************
++ Global service support API - operations on held messages and message iterators
++ *****************************************************************************/
++
++// Routine to get the address of a held message
++extern void *vchi_held_msg_ptr( const VCHI_HELD_MSG_T *message );
++
++// Routine to get the size of a held message
++extern int32_t vchi_held_msg_size( const VCHI_HELD_MSG_T *message );
++
++// Routine to get the transmit timestamp as written into the header by the peer
++extern uint32_t vchi_held_msg_tx_timestamp( const VCHI_HELD_MSG_T *message );
++
++// Routine to get the reception timestamp, written as we parsed the header
++extern uint32_t vchi_held_msg_rx_timestamp( const VCHI_HELD_MSG_T *message );
++
++// Routine to release a held message after it has been processed
++extern int32_t vchi_held_msg_release( VCHI_HELD_MSG_T *message );
++
++// Indicates whether the iterator has a next message.
++extern int32_t vchi_msg_iter_has_next( const VCHI_MSG_ITER_T *iter );
++
++// Return the pointer and length for the next message and advance the iterator.
++extern int32_t vchi_msg_iter_next( VCHI_MSG_ITER_T *iter,
++ void **data,
++ uint32_t *msg_size );
++
++// Remove the last message returned by vchi_msg_iter_next.
++// Can only be called once after each call to vchi_msg_iter_next.
++extern int32_t vchi_msg_iter_remove( VCHI_MSG_ITER_T *iter );
++
++// Hold the last message returned by vchi_msg_iter_next.
++// Can only be called once after each call to vchi_msg_iter_next.
++extern int32_t vchi_msg_iter_hold( VCHI_MSG_ITER_T *iter,
++ VCHI_HELD_MSG_T *message );
++
++// Return information for the next message, and hold it, advancing the iterator.
++extern int32_t vchi_msg_iter_hold_next( VCHI_MSG_ITER_T *iter,
++ void **data, // } may be NULL
++ uint32_t *msg_size, // }
++ VCHI_HELD_MSG_T *message );
++
++
++/******************************************************************************
++ Global bulk API
++ *****************************************************************************/
++
++// Routine to prepare interface for a transfer from the other side
++extern int32_t vchi_bulk_queue_receive( VCHI_SERVICE_HANDLE_T handle,
++ void *data_dst,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *transfer_handle );
++
++
++// Prepare interface for a transfer from the other side into relocatable memory.
++int32_t vchi_bulk_queue_receive_reloc( const VCHI_SERVICE_HANDLE_T handle,
++ VCHI_MEM_HANDLE_T h_dst,
++ uint32_t offset,
++ uint32_t data_size,
++ const VCHI_FLAGS_T flags,
++ void * const bulk_handle );
++
++// Routine to queue up data ready for transfer to the other (once they have signalled they are ready)
++extern int32_t vchi_bulk_queue_transmit( VCHI_SERVICE_HANDLE_T handle,
++ const void *data_src,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *transfer_handle );
++
++
++/******************************************************************************
++ Configuration plumbing
++ *****************************************************************************/
++
++// function prototypes for the different mid layers (the state info gives the different physical connections)
++extern const VCHI_CONNECTION_API_T *single_get_func_table( void );
++//extern const VCHI_CONNECTION_API_T *local_server_get_func_table( void );
++//extern const VCHI_CONNECTION_API_T *local_client_get_func_table( void );
++
++// declare all message drivers here
++const VCHI_MESSAGE_DRIVER_T *vchi_mphi_message_driver_func_table( void );
++
++#ifdef __cplusplus
++}
++#endif
++
++extern int32_t vchi_bulk_queue_transmit_reloc( VCHI_SERVICE_HANDLE_T handle,
++ VCHI_MEM_HANDLE_T h_src,
++ uint32_t offset,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *transfer_handle );
++#endif /* VCHI_H_ */
++
++/****************************** End of file **********************************/
+diff --git a/drivers/misc/vc04_services/interface/vchi/vchi_cfg.h b/drivers/misc/vc04_services/interface/vchi/vchi_cfg.h
+new file mode 100644
+index 0000000..26bc2d3
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/vchi_cfg.h
+@@ -0,0 +1,224 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHI_CFG_H_
++#define VCHI_CFG_H_
++
++/****************************************************************************************
++ * Defines in this first section are part of the VCHI API and may be examined by VCHI
++ * services.
++ ***************************************************************************************/
++
++/* Required alignment of base addresses for bulk transfer, if unaligned transfers are not enabled */
++/* Really determined by the message driver, and should be available from a run-time call. */
++#ifndef VCHI_BULK_ALIGN
++# if __VCCOREVER__ >= 0x04000000
++# define VCHI_BULK_ALIGN 32 // Allows for the need to do cache cleans
++# else
++# define VCHI_BULK_ALIGN 16
++# endif
++#endif
++
++/* Required length multiple for bulk transfers, if unaligned transfers are not enabled */
++/* May be less than or greater than VCHI_BULK_ALIGN */
++/* Really determined by the message driver, and should be available from a run-time call. */
++#ifndef VCHI_BULK_GRANULARITY
++# if __VCCOREVER__ >= 0x04000000
++# define VCHI_BULK_GRANULARITY 32 // Allows for the need to do cache cleans
++# else
++# define VCHI_BULK_GRANULARITY 16
++# endif
++#endif
++
++/* The largest possible message to be queued with vchi_msg_queue. */
++#ifndef VCHI_MAX_MSG_SIZE
++# if defined VCHI_LOCAL_HOST_PORT
++# define VCHI_MAX_MSG_SIZE 16384 // makes file transfers fast, but should they be using bulk?
++# else
++# define VCHI_MAX_MSG_SIZE 4096 // NOTE: THIS MUST BE LARGER THAN OR EQUAL TO THE SIZE OF THE KHRONOS MERGE BUFFER!!
++# endif
++#endif
++
++/******************************************************************************************
++ * Defines below are system configuration options, and should not be used by VCHI services.
++ *****************************************************************************************/
++
++/* How many connections can we support? A localhost implementation uses 2 connections,
++ * 1 for host-app, 1 for VMCS, and these are hooked together by a loopback MPHI VCFW
++ * driver. */
++#ifndef VCHI_MAX_NUM_CONNECTIONS
++# define VCHI_MAX_NUM_CONNECTIONS 3
++#endif
++
++/* How many services can we open per connection? Extending this doesn't cost processing time, just a small
++ * amount of static memory. */
++#ifndef VCHI_MAX_SERVICES_PER_CONNECTION
++# define VCHI_MAX_SERVICES_PER_CONNECTION 36
++#endif
++
++/* Adjust if using a message driver that supports more logical TX channels */
++#ifndef VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION
++# define VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION 9 // 1 MPHI + 8 CCP2 logical channels
++#endif
++
++/* Adjust if using a message driver that supports more logical RX channels */
++#ifndef VCHI_MAX_BULK_RX_CHANNELS_PER_CONNECTION
++# define VCHI_MAX_BULK_RX_CHANNELS_PER_CONNECTION 1 // 1 MPHI
++#endif
++
++/* How many receive slots do we use. This times VCHI_MAX_MSG_SIZE gives the effective
++ * receive queue space, less message headers. */
++#ifndef VCHI_NUM_READ_SLOTS
++# if defined(VCHI_LOCAL_HOST_PORT)
++# define VCHI_NUM_READ_SLOTS 4
++# else
++# define VCHI_NUM_READ_SLOTS 48
++# endif
++#endif
++
++/* Do we utilise overrun facility for receive message slots? Can aid peer transmit
++ * performance. Only define on VideoCore end, talking to host.
++ */
++//#define VCHI_MSG_RX_OVERRUN
++
++/* How many transmit slots do we use. Generally don't need many, as the hardware driver
++ * underneath VCHI will usually have its own buffering. */
++#ifndef VCHI_NUM_WRITE_SLOTS
++# define VCHI_NUM_WRITE_SLOTS 4
++#endif
++
++/* If a service has held or queued received messages in VCHI_XOFF_THRESHOLD or more slots,
++ * then it's taking up too much buffer space, and the peer service will be told to stop
++ * transmitting with an XOFF message. For this to be effective, the VCHI_NUM_READ_SLOTS
++ * needs to be considerably bigger than VCHI_NUM_WRITE_SLOTS, or the transmit latency
++ * is too high. */
++#ifndef VCHI_XOFF_THRESHOLD
++# define VCHI_XOFF_THRESHOLD (VCHI_NUM_READ_SLOTS / 2)
++#endif
++
++/* After we've sent an XOFF, the peer will be told to resume transmission once the local
++ * service has dequeued/released enough messages that it's now occupying
++ * VCHI_XON_THRESHOLD slots or fewer. */
++#ifndef VCHI_XON_THRESHOLD
++# define VCHI_XON_THRESHOLD (VCHI_NUM_READ_SLOTS / 4)
++#endif
++
++/* A size below which a bulk transfer omits the handshake completely and always goes
++ * via the message channel, if bulk auxiliary is being sent on that service. (The user
++ * can guarantee this by enabling unaligned transmits).
++ * Not API. */
++#ifndef VCHI_MIN_BULK_SIZE
++# define VCHI_MIN_BULK_SIZE ( VCHI_MAX_MSG_SIZE / 2 < 4096 ? VCHI_MAX_MSG_SIZE / 2 : 4096 )
++#endif
++
++/* Maximum size of bulk transmission chunks, for each interface type. A trade-off between
++ * speed and latency; the smaller the chunk size the better change of messages and other
++ * bulk transmissions getting in when big bulk transfers are happening. Set to 0 to not
++ * break transmissions into chunks.
++ */
++#ifndef VCHI_MAX_BULK_CHUNK_SIZE_MPHI
++# define VCHI_MAX_BULK_CHUNK_SIZE_MPHI (16 * 1024)
++#endif
++
++/* NB Chunked CCP2 transmissions violate the letter of the CCP2 spec by using "JPEG8" mode
++ * with multiple-line frames. Only use if the receiver can cope. */
++#ifndef VCHI_MAX_BULK_CHUNK_SIZE_CCP2
++# define VCHI_MAX_BULK_CHUNK_SIZE_CCP2 0
++#endif
++
++/* How many TX messages can we have pending in our transmit slots. Once exhausted,
++ * vchi_msg_queue will be blocked. */
++#ifndef VCHI_TX_MSG_QUEUE_SIZE
++# define VCHI_TX_MSG_QUEUE_SIZE 256
++#endif
++
++/* How many RX messages can we have parsed in the receive slots. Once exhausted, parsing
++ * will be suspended until older messages are dequeued/released. */
++#ifndef VCHI_RX_MSG_QUEUE_SIZE
++# define VCHI_RX_MSG_QUEUE_SIZE 256
++#endif
++
++/* Really should be able to cope if we run out of received message descriptors, by
++ * suspending parsing as the comment above says, but we don't. This sweeps the issue
++ * under the carpet. */
++#if VCHI_RX_MSG_QUEUE_SIZE < (VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS
++# undef VCHI_RX_MSG_QUEUE_SIZE
++# define VCHI_RX_MSG_QUEUE_SIZE (VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS
++#endif
++
++/* How many bulk transmits can we have pending. Once exhausted, vchi_bulk_queue_transmit
++ * will be blocked. */
++#ifndef VCHI_TX_BULK_QUEUE_SIZE
++# define VCHI_TX_BULK_QUEUE_SIZE 64
++#endif
++
++/* How many bulk receives can we have pending. Once exhausted, vchi_bulk_queue_receive
++ * will be blocked. */
++#ifndef VCHI_RX_BULK_QUEUE_SIZE
++# define VCHI_RX_BULK_QUEUE_SIZE 64
++#endif
++
++/* A limit on how many outstanding bulk requests we expect the peer to give us. If
++ * the peer asks for more than this, VCHI will fail and assert. The number is determined
++ * by the peer's hardware - it's the number of outstanding requests that can be queued
++ * on all bulk channels. VC3's MPHI peripheral allows 16. */
++#ifndef VCHI_MAX_PEER_BULK_REQUESTS
++# define VCHI_MAX_PEER_BULK_REQUESTS 32
++#endif
++
++/* Define VCHI_CCP2TX_MANUAL_POWER if the host tells us when to turn the CCP2
++ * transmitter on and off.
++ */
++/*#define VCHI_CCP2TX_MANUAL_POWER*/
++
++#ifndef VCHI_CCP2TX_MANUAL_POWER
++
++/* Timeout (in milliseconds) for putting the CCP2TX interface into IDLE state. Set
++ * negative for no IDLE.
++ */
++# ifndef VCHI_CCP2TX_IDLE_TIMEOUT
++# define VCHI_CCP2TX_IDLE_TIMEOUT 5
++# endif
++
++/* Timeout (in milliseconds) for putting the CCP2TX interface into OFF state. Set
++ * negative for no OFF.
++ */
++# ifndef VCHI_CCP2TX_OFF_TIMEOUT
++# define VCHI_CCP2TX_OFF_TIMEOUT 1000
++# endif
++
++#endif /* VCHI_CCP2TX_MANUAL_POWER */
++
++#endif /* VCHI_CFG_H_ */
++
++/****************************** End of file **********************************/
+diff --git a/drivers/misc/vc04_services/interface/vchi/vchi_cfg_internal.h b/drivers/misc/vc04_services/interface/vchi/vchi_cfg_internal.h
+new file mode 100644
+index 0000000..35dcba4
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/vchi_cfg_internal.h
+@@ -0,0 +1,71 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHI_CFG_INTERNAL_H_
++#define VCHI_CFG_INTERNAL_H_
++
++/****************************************************************************************
++ * Control optimisation attempts.
++ ***************************************************************************************/
++
++// Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second
++#define VCHI_COARSE_LOCKING
++
++// Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx)
++// (only relevant if VCHI_COARSE_LOCKING)
++#define VCHI_ELIDE_BLOCK_EXIT_LOCK
++
++// Avoid lock on non-blocking peek
++// (only relevant if VCHI_COARSE_LOCKING)
++#define VCHI_AVOID_PEEK_LOCK
++
++// Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation.
++#define VCHI_MULTIPLE_HANDLER_THREADS
++
++// Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash
++// our way through the pool of descriptors.
++#define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD
++
++// Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING.
++#define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS
++
++// Don't use message descriptors for TX messages that don't need them
++#define VCHI_MINIMISE_TX_MSG_DESCRIPTORS
++
++// Nano-locks for multiqueue
++//#define VCHI_MQUEUE_NANOLOCKS
++
++// Lock-free(er) dequeuing
++//#define VCHI_RX_NANOLOCKS
++
++#endif /*VCHI_CFG_INTERNAL_H_*/
+diff --git a/drivers/misc/vc04_services/interface/vchi/vchi_common.h b/drivers/misc/vc04_services/interface/vchi/vchi_common.h
+new file mode 100644
+index 0000000..d76118c
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/vchi_common.h
+@@ -0,0 +1,174 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHI_COMMON_H_
++#define VCHI_COMMON_H_
++
++
++//flags used when sending messages (must be bitmapped)
++typedef enum
++{
++ VCHI_FLAGS_NONE = 0x0,
++ VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE = 0x1, // waits for message to be received, or sent (NB. not the same as being seen on other side)
++ VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE = 0x2, // run a callback when message sent
++ VCHI_FLAGS_BLOCK_UNTIL_QUEUED = 0x4, // return once the transfer is in a queue ready to go
++ VCHI_FLAGS_ALLOW_PARTIAL = 0x8,
++ VCHI_FLAGS_BLOCK_UNTIL_DATA_READ = 0x10,
++ VCHI_FLAGS_CALLBACK_WHEN_DATA_READ = 0x20,
++
++ VCHI_FLAGS_ALIGN_SLOT = 0x000080, // internal use only
++ VCHI_FLAGS_BULK_AUX_QUEUED = 0x010000, // internal use only
++ VCHI_FLAGS_BULK_AUX_COMPLETE = 0x020000, // internal use only
++ VCHI_FLAGS_BULK_DATA_QUEUED = 0x040000, // internal use only
++ VCHI_FLAGS_BULK_DATA_COMPLETE = 0x080000, // internal use only
++ VCHI_FLAGS_INTERNAL = 0xFF0000
++} VCHI_FLAGS_T;
++
++// constants for vchi_crc_control()
++typedef enum {
++ VCHI_CRC_NOTHING = -1,
++ VCHI_CRC_PER_SERVICE = 0,
++ VCHI_CRC_EVERYTHING = 1,
++} VCHI_CRC_CONTROL_T;
++
++//callback reasons when an event occurs on a service
++typedef enum
++{
++ VCHI_CALLBACK_REASON_MIN,
++
++ //This indicates that there is data available
++ //handle is the msg id that was transmitted with the data
++ // When a message is received and there was no FULL message available previously, send callback
++ // Tasks get kicked by the callback, reset their event and try and read from the fifo until it fails
++ VCHI_CALLBACK_MSG_AVAILABLE,
++ VCHI_CALLBACK_MSG_SENT,
++ VCHI_CALLBACK_MSG_SPACE_AVAILABLE, // XXX not yet implemented
++
++ // This indicates that a transfer from the other side has completed
++ VCHI_CALLBACK_BULK_RECEIVED,
++ //This indicates that data queued up to be sent has now gone
++ //handle is the msg id that was used when sending the data
++ VCHI_CALLBACK_BULK_SENT,
++ VCHI_CALLBACK_BULK_RX_SPACE_AVAILABLE, // XXX not yet implemented
++ VCHI_CALLBACK_BULK_TX_SPACE_AVAILABLE, // XXX not yet implemented
++
++ VCHI_CALLBACK_SERVICE_CLOSED,
++
++ // this side has sent XOFF to peer due to lack of data consumption by service
++ // (suggests the service may need to take some recovery action if it has
++ // been deliberately holding off consuming data)
++ VCHI_CALLBACK_SENT_XOFF,
++ VCHI_CALLBACK_SENT_XON,
++
++ // indicates that a bulk transfer has finished reading the source buffer
++ VCHI_CALLBACK_BULK_DATA_READ,
++
++ // power notification events (currently host side only)
++ VCHI_CALLBACK_PEER_OFF,
++ VCHI_CALLBACK_PEER_SUSPENDED,
++ VCHI_CALLBACK_PEER_ON,
++ VCHI_CALLBACK_PEER_RESUMED,
++ VCHI_CALLBACK_FORCED_POWER_OFF,
++
++#ifdef USE_VCHIQ_ARM
++ // some extra notifications provided by vchiq_arm
++ VCHI_CALLBACK_SERVICE_OPENED,
++ VCHI_CALLBACK_BULK_RECEIVE_ABORTED,
++ VCHI_CALLBACK_BULK_TRANSMIT_ABORTED,
++#endif
++
++ VCHI_CALLBACK_REASON_MAX
++} VCHI_CALLBACK_REASON_T;
++
++// service control options
++typedef enum
++{
++ VCHI_SERVICE_OPTION_MIN,
++
++ VCHI_SERVICE_OPTION_TRACE,
++
++ VCHI_SERVICE_OPTION_MAX
++} VCHI_SERVICE_OPTION_T;
++
++
++//Callback used by all services / bulk transfers
++typedef void (*VCHI_CALLBACK_T)( void *callback_param, //my service local param
++ VCHI_CALLBACK_REASON_T reason,
++ void *handle ); //for transmitting msg's only
++
++
++
++/*
++ * Define vector struct for scatter-gather (vector) operations
++ * Vectors can be nested - if a vector element has negative length, then
++ * the data pointer is treated as pointing to another vector array, with
++ * '-vec_len' elements. Thus to append a header onto an existing vector,
++ * you can do this:
++ *
++ * void foo(const VCHI_MSG_VECTOR_T *v, int n)
++ * {
++ * VCHI_MSG_VECTOR_T nv[2];
++ * nv[0].vec_base = my_header;
++ * nv[0].vec_len = sizeof my_header;
++ * nv[1].vec_base = v;
++ * nv[1].vec_len = -n;
++ * ...
++ *
++ */
++typedef struct vchi_msg_vector {
++ const void *vec_base;
++ int32_t vec_len;
++} VCHI_MSG_VECTOR_T;
++
++// Opaque type for a connection API
++typedef struct opaque_vchi_connection_api_t VCHI_CONNECTION_API_T;
++
++// Opaque type for a message driver
++typedef struct opaque_vchi_message_driver_t VCHI_MESSAGE_DRIVER_T;
++
++
++// Iterator structure for reading ahead through received message queue. Allocated by client,
++// initialised by vchi_msg_look_ahead. Fields are for internal VCHI use only.
++// Iterates over messages in queue at the instant of the call to vchi_msg_lookahead -
++// will not proceed to messages received since. Behaviour is undefined if an iterator
++// is used again after messages for that service are removed/dequeued by any
++// means other than vchi_msg_iter_... calls on the iterator itself.
++typedef struct {
++ struct opaque_vchi_service_t *service;
++ void *last;
++ void *next;
++ void *remove;
++} VCHI_MSG_ITER_T;
++
++
++#endif // VCHI_COMMON_H_
+diff --git a/drivers/misc/vc04_services/interface/vchi/vchi_mh.h b/drivers/misc/vc04_services/interface/vchi/vchi_mh.h
+new file mode 100644
+index 0000000..198bd07
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchi/vchi_mh.h
+@@ -0,0 +1,42 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHI_MH_H_
++#define VCHI_MH_H_
++
++#include <linux/types.h>
++
++typedef int32_t VCHI_MEM_HANDLE_T;
++#define VCHI_MEM_HANDLE_INVALID 0
++
++#endif
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq.h
+new file mode 100644
+index 0000000..ad398ba
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq.h
+@@ -0,0 +1,40 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_VCHIQ_H
++#define VCHIQ_VCHIQ_H
++
++#include "vchiq_if.h"
++#include "vchiq_util.h"
++
++#endif
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835.h
+new file mode 100644
+index 0000000..7ea5c64
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835.h
+@@ -0,0 +1,42 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_2835_H
++#define VCHIQ_2835_H
++
++#include "vchiq_pagelist.h"
++
++#define VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX 0
++#define VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX 1
++
++#endif /* VCHIQ_2835_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+new file mode 100644
+index 0000000..b3bdaa2
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+@@ -0,0 +1,561 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#include <linux/kernel.h>
++#include <linux/types.h>
++#include <linux/errno.h>
++#include <linux/interrupt.h>
++#include <linux/irq.h>
++#include <linux/pagemap.h>
++#include <linux/dma-mapping.h>
++#include <linux/version.h>
++#include <linux/io.h>
++#include <linux/uaccess.h>
++#include <asm/pgtable.h>
++
++#include <mach/irqs.h>
++
++#include <mach/platform.h>
++#include <mach/vcio.h>
++
++#define TOTAL_SLOTS (VCHIQ_SLOT_ZERO_SLOTS + 2 * 32)
++
++#define VCHIQ_DOORBELL_IRQ IRQ_ARM_DOORBELL_0
++#define VCHIQ_ARM_ADDRESS(x) ((void *)__virt_to_bus((unsigned)x))
++
++#include "vchiq_arm.h"
++#include "vchiq_2835.h"
++#include "vchiq_connected.h"
++
++#define MAX_FRAGMENTS (VCHIQ_NUM_CURRENT_BULKS * 2)
++
++typedef struct vchiq_2835_state_struct {
++ int inited;
++ VCHIQ_ARM_STATE_T arm_state;
++} VCHIQ_2835_ARM_STATE_T;
++
++static char *g_slot_mem;
++static int g_slot_mem_size;
++dma_addr_t g_slot_phys;
++static FRAGMENTS_T *g_fragments_base;
++static FRAGMENTS_T *g_free_fragments;
++struct semaphore g_free_fragments_sema;
++
++extern int vchiq_arm_log_level;
++
++static DEFINE_SEMAPHORE(g_free_fragments_mutex);
++
++static irqreturn_t
++vchiq_doorbell_irq(int irq, void *dev_id);
++
++static int
++create_pagelist(char __user *buf, size_t count, unsigned short type,
++ struct task_struct *task, PAGELIST_T ** ppagelist);
++
++static void
++free_pagelist(PAGELIST_T *pagelist, int actual);
++
++int __init
++vchiq_platform_init(VCHIQ_STATE_T *state)
++{
++ VCHIQ_SLOT_ZERO_T *vchiq_slot_zero;
++ int frag_mem_size;
++ int err;
++ int i;
++
++ /* Allocate space for the channels in coherent memory */
++ g_slot_mem_size = PAGE_ALIGN(TOTAL_SLOTS * VCHIQ_SLOT_SIZE);
++ frag_mem_size = PAGE_ALIGN(sizeof(FRAGMENTS_T) * MAX_FRAGMENTS);
++
++ g_slot_mem = dma_alloc_coherent(NULL, g_slot_mem_size + frag_mem_size,
++ &g_slot_phys, GFP_ATOMIC);
++
++ if (!g_slot_mem) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "Unable to allocate channel memory");
++ err = -ENOMEM;
++ goto failed_alloc;
++ }
++
++ WARN_ON(((int)g_slot_mem & (PAGE_SIZE - 1)) != 0);
++
++ vchiq_slot_zero = vchiq_init_slots(g_slot_mem, g_slot_mem_size);
++ if (!vchiq_slot_zero) {
++ err = -EINVAL;
++ goto failed_init_slots;
++ }
++
++ vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX] =
++ (int)g_slot_phys + g_slot_mem_size;
++ vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX] =
++ MAX_FRAGMENTS;
++
++ g_fragments_base = (FRAGMENTS_T *)(g_slot_mem + g_slot_mem_size);
++ g_slot_mem_size += frag_mem_size;
++
++ g_free_fragments = g_fragments_base;
++ for (i = 0; i < (MAX_FRAGMENTS - 1); i++) {
++ *(FRAGMENTS_T **)&g_fragments_base[i] =
++ &g_fragments_base[i + 1];
++ }
++ *(FRAGMENTS_T **)&g_fragments_base[i] = NULL;
++ sema_init(&g_free_fragments_sema, MAX_FRAGMENTS);
++
++ if (vchiq_init_state(state, vchiq_slot_zero, 0/*slave*/) !=
++ VCHIQ_SUCCESS) {
++ err = -EINVAL;
++ goto failed_vchiq_init;
++ }
++
++ err = request_irq(VCHIQ_DOORBELL_IRQ, vchiq_doorbell_irq,
++ IRQF_IRQPOLL, "VCHIQ doorbell",
++ state);
++ if (err < 0) {
++ vchiq_log_error(vchiq_arm_log_level, "%s: failed to register "
++ "irq=%d err=%d", __func__,
++ VCHIQ_DOORBELL_IRQ, err);
++ goto failed_request_irq;
++ }
++
++ /* Send the base address of the slots to VideoCore */
++
++ dsb(); /* Ensure all writes have completed */
++
++ bcm_mailbox_write(MBOX_CHAN_VCHIQ, (unsigned int)g_slot_phys);
++
++ vchiq_log_info(vchiq_arm_log_level,
++ "vchiq_init - done (slots %x, phys %x)",
++ (unsigned int)vchiq_slot_zero, g_slot_phys);
++
++ vchiq_call_connected_callbacks();
++
++ return 0;
++
++failed_request_irq:
++failed_vchiq_init:
++failed_init_slots:
++ dma_free_coherent(NULL, g_slot_mem_size, g_slot_mem, g_slot_phys);
++
++failed_alloc:
++ return err;
++}
++
++void __exit
++vchiq_platform_exit(VCHIQ_STATE_T *state)
++{
++ free_irq(VCHIQ_DOORBELL_IRQ, state);
++ dma_free_coherent(NULL, g_slot_mem_size,
++ g_slot_mem, g_slot_phys);
++}
++
++
++VCHIQ_STATUS_T
++vchiq_platform_init_state(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++ state->platform_state = kzalloc(sizeof(VCHIQ_2835_ARM_STATE_T), GFP_KERNEL);
++ ((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->inited = 1;
++ status = vchiq_arm_init_state(state, &((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->arm_state);
++ if(status != VCHIQ_SUCCESS)
++ {
++ ((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->inited = 0;
++ }
++ return status;
++}
++
++VCHIQ_ARM_STATE_T*
++vchiq_platform_get_arm_state(VCHIQ_STATE_T *state)
++{
++ if(!((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->inited)
++ {
++ BUG();
++ }
++ return &((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->arm_state;
++}
++
++void
++remote_event_signal(REMOTE_EVENT_T *event)
++{
++ wmb();
++
++ event->fired = 1;
++
++ dsb(); /* data barrier operation */
++
++ if (event->armed) {
++ /* trigger vc interrupt */
++
++ writel(0, __io_address(ARM_0_BELL2));
++ }
++}
++
++int
++vchiq_copy_from_user(void *dst, const void *src, int size)
++{
++ if ((uint32_t)src < TASK_SIZE) {
++ return copy_from_user(dst, src, size);
++ } else {
++ memcpy(dst, src, size);
++ return 0;
++ }
++}
++
++VCHIQ_STATUS_T
++vchiq_prepare_bulk_data(VCHIQ_BULK_T *bulk, VCHI_MEM_HANDLE_T memhandle,
++ void *offset, int size, int dir)
++{
++ PAGELIST_T *pagelist;
++ int ret;
++
++ WARN_ON(memhandle != VCHI_MEM_HANDLE_INVALID);
++
++ ret = create_pagelist((char __user *)offset, size,
++ (dir == VCHIQ_BULK_RECEIVE)
++ ? PAGELIST_READ
++ : PAGELIST_WRITE,
++ current,
++ &pagelist);
++ if (ret != 0)
++ return VCHIQ_ERROR;
++
++ bulk->handle = memhandle;
++ bulk->data = VCHIQ_ARM_ADDRESS(pagelist);
++
++ /* Store the pagelist address in remote_data, which isn't used by the
++ slave. */
++ bulk->remote_data = pagelist;
++
++ return VCHIQ_SUCCESS;
++}
++
++void
++vchiq_complete_bulk(VCHIQ_BULK_T *bulk)
++{
++ if (bulk && bulk->remote_data && bulk->actual)
++ free_pagelist((PAGELIST_T *)bulk->remote_data, bulk->actual);
++}
++
++void
++vchiq_transfer_bulk(VCHIQ_BULK_T *bulk)
++{
++ /*
++ * This should only be called on the master (VideoCore) side, but
++ * provide an implementation to avoid the need for ifdefery.
++ */
++ BUG();
++}
++
++void
++vchiq_dump_platform_state(void *dump_context)
++{
++ char buf[80];
++ int len;
++ len = snprintf(buf, sizeof(buf),
++ " Platform: 2835 (VC master)");
++ vchiq_dump(dump_context, buf, len + 1);
++}
++
++VCHIQ_STATUS_T
++vchiq_platform_suspend(VCHIQ_STATE_T *state)
++{
++ return VCHIQ_ERROR;
++}
++
++VCHIQ_STATUS_T
++vchiq_platform_resume(VCHIQ_STATE_T *state)
++{
++ return VCHIQ_SUCCESS;
++}
++
++void
++vchiq_platform_paused(VCHIQ_STATE_T *state)
++{
++}
++
++void
++vchiq_platform_resumed(VCHIQ_STATE_T *state)
++{
++}
++
++int
++vchiq_platform_videocore_wanted(VCHIQ_STATE_T* state)
++{
++ return 1; // autosuspend not supported - videocore always wanted
++}
++
++int
++vchiq_platform_use_suspend_timer(void)
++{
++ return 0;
++}
++void
++vchiq_dump_platform_use_state(VCHIQ_STATE_T *state)
++{
++ vchiq_log_info((vchiq_arm_log_level>=VCHIQ_LOG_INFO),"Suspend timer not in use");
++}
++void
++vchiq_platform_handle_timeout(VCHIQ_STATE_T *state)
++{
++ (void)state;
++}
++/*
++ * Local functions
++ */
++
++static irqreturn_t
++vchiq_doorbell_irq(int irq, void *dev_id)
++{
++ VCHIQ_STATE_T *state = dev_id;
++ irqreturn_t ret = IRQ_NONE;
++ unsigned int status;
++
++ /* Read (and clear) the doorbell */
++ status = readl(__io_address(ARM_0_BELL0));
++
++ if (status & 0x4) { /* Was the doorbell rung? */
++ remote_event_pollall(state);
++ ret = IRQ_HANDLED;
++ }
++
++ return ret;
++}
++
++/* There is a potential problem with partial cache lines (pages?)
++** at the ends of the block when reading. If the CPU accessed anything in
++** the same line (page?) then it may have pulled old data into the cache,
++** obscuring the new data underneath. We can solve this by transferring the
++** partial cache lines separately, and allowing the ARM to copy into the
++** cached area.
++
++** N.B. This implementation plays slightly fast and loose with the Linux
++** driver programming rules, e.g. its use of __virt_to_bus instead of
++** dma_map_single, but it isn't a multi-platform driver and it benefits
++** from increased speed as a result.
++*/
++
++static int
++create_pagelist(char __user *buf, size_t count, unsigned short type,
++ struct task_struct *task, PAGELIST_T ** ppagelist)
++{
++ PAGELIST_T *pagelist;
++ struct page **pages;
++ struct page *page;
++ unsigned long *addrs;
++ unsigned int num_pages, offset, i;
++ char *addr, *base_addr, *next_addr;
++ int run, addridx, actual_pages;
++ unsigned long *need_release;
++
++ offset = (unsigned int)buf & (PAGE_SIZE - 1);
++ num_pages = (count + offset + PAGE_SIZE - 1) / PAGE_SIZE;
++
++ *ppagelist = NULL;
++
++ /* Allocate enough storage to hold the page pointers and the page
++ ** list
++ */
++ pagelist = kmalloc(sizeof(PAGELIST_T) +
++ (num_pages * sizeof(unsigned long)) +
++ sizeof(unsigned long) +
++ (num_pages * sizeof(pages[0])),
++ GFP_KERNEL);
++
++ vchiq_log_trace(vchiq_arm_log_level,
++ "create_pagelist - %x", (unsigned int)pagelist);
++ if (!pagelist)
++ return -ENOMEM;
++
++ addrs = pagelist->addrs;
++ need_release = (unsigned long *)(addrs + num_pages);
++ pages = (struct page **)(addrs + num_pages + 1);
++
++ if (is_vmalloc_addr(buf)) {
++ for (actual_pages = 0; actual_pages < num_pages; actual_pages++) {
++ pages[actual_pages] = vmalloc_to_page(buf + (actual_pages * PAGE_SIZE));
++ }
++ *need_release = 0; /* do not try and release vmalloc pages */
++ } else {
++ down_read(&task->mm->mmap_sem);
++ actual_pages = get_user_pages(task, task->mm,
++ (unsigned long)buf & ~(PAGE_SIZE - 1),
++ num_pages,
++ (type == PAGELIST_READ) /*Write */ ,
++ 0 /*Force */ ,
++ pages,
++ NULL /*vmas */);
++ up_read(&task->mm->mmap_sem);
++
++ if (actual_pages != num_pages) {
++ vchiq_log_info(vchiq_arm_log_level,
++ "create_pagelist - only %d/%d pages locked",
++ actual_pages,
++ num_pages);
++
++ /* This is probably due to the process being killed */
++ while (actual_pages > 0)
++ {
++ actual_pages--;
++ page_cache_release(pages[actual_pages]);
++ }
++ kfree(pagelist);
++ if (actual_pages == 0)
++ actual_pages = -ENOMEM;
++ return actual_pages;
++ }
++ *need_release = 1; /* release user pages */
++ }
++
++ pagelist->length = count;
++ pagelist->type = type;
++ pagelist->offset = offset;
++
++ /* Group the pages into runs of contiguous pages */
++
++ base_addr = VCHIQ_ARM_ADDRESS(page_address(pages[0]));
++ next_addr = base_addr + PAGE_SIZE;
++ addridx = 0;
++ run = 0;
++
++ for (i = 1; i < num_pages; i++) {
++ addr = VCHIQ_ARM_ADDRESS(page_address(pages[i]));
++ if ((addr == next_addr) && (run < (PAGE_SIZE - 1))) {
++ next_addr += PAGE_SIZE;
++ run++;
++ } else {
++ addrs[addridx] = (unsigned long)base_addr + run;
++ addridx++;
++ base_addr = addr;
++ next_addr = addr + PAGE_SIZE;
++ run = 0;
++ }
++ }
++
++ addrs[addridx] = (unsigned long)base_addr + run;
++ addridx++;
++
++ /* Partial cache lines (fragments) require special measures */
++ if ((type == PAGELIST_READ) &&
++ ((pagelist->offset & (CACHE_LINE_SIZE - 1)) ||
++ ((pagelist->offset + pagelist->length) &
++ (CACHE_LINE_SIZE - 1)))) {
++ FRAGMENTS_T *fragments;
++
++ if (down_interruptible(&g_free_fragments_sema) != 0) {
++ kfree(pagelist);
++ return -EINTR;
++ }
++
++ WARN_ON(g_free_fragments == NULL);
++
++ down(&g_free_fragments_mutex);
++ fragments = (FRAGMENTS_T *) g_free_fragments;
++ WARN_ON(fragments == NULL);
++ g_free_fragments = *(FRAGMENTS_T **) g_free_fragments;
++ up(&g_free_fragments_mutex);
++ pagelist->type =
++ PAGELIST_READ_WITH_FRAGMENTS + (fragments -
++ g_fragments_base);
++ }
++
++ for (page = virt_to_page(pagelist);
++ page <= virt_to_page(addrs + num_pages - 1); page++) {
++ flush_dcache_page(page);
++ }
++
++ *ppagelist = pagelist;
++
++ return 0;
++}
++
++static void
++free_pagelist(PAGELIST_T *pagelist, int actual)
++{
++ unsigned long *need_release;
++ struct page **pages;
++ unsigned int num_pages, i;
++
++ vchiq_log_trace(vchiq_arm_log_level,
++ "free_pagelist - %x, %d", (unsigned int)pagelist, actual);
++
++ num_pages =
++ (pagelist->length + pagelist->offset + PAGE_SIZE - 1) /
++ PAGE_SIZE;
++
++ need_release = (unsigned long *)(pagelist->addrs + num_pages);
++ pages = (struct page **)(pagelist->addrs + num_pages + 1);
++
++ /* Deal with any partial cache lines (fragments) */
++ if (pagelist->type >= PAGELIST_READ_WITH_FRAGMENTS) {
++ FRAGMENTS_T *fragments = g_fragments_base +
++ (pagelist->type - PAGELIST_READ_WITH_FRAGMENTS);
++ int head_bytes, tail_bytes;
++ head_bytes = (CACHE_LINE_SIZE - pagelist->offset) &
++ (CACHE_LINE_SIZE - 1);
++ tail_bytes = (pagelist->offset + actual) &
++ (CACHE_LINE_SIZE - 1);
++
++ if ((actual >= 0) && (head_bytes != 0)) {
++ if (head_bytes > actual)
++ head_bytes = actual;
++
++ memcpy((char *)page_address(pages[0]) +
++ pagelist->offset,
++ fragments->headbuf,
++ head_bytes);
++ }
++ if ((actual >= 0) && (head_bytes < actual) &&
++ (tail_bytes != 0)) {
++ memcpy((char *)page_address(pages[num_pages - 1]) +
++ ((pagelist->offset + actual) &
++ (PAGE_SIZE - 1) & ~(CACHE_LINE_SIZE - 1)),
++ fragments->tailbuf, tail_bytes);
++ }
++
++ down(&g_free_fragments_mutex);
++ *(FRAGMENTS_T **) fragments = g_free_fragments;
++ g_free_fragments = fragments;
++ up(&g_free_fragments_mutex);
++ up(&g_free_fragments_sema);
++ }
++
++ if (*need_release) {
++ for (i = 0; i < num_pages; i++) {
++ if (pagelist->type != PAGELIST_WRITE)
++ set_page_dirty(pages[i]);
++
++ page_cache_release(pages[i]);
++ }
++ }
++
++ kfree(pagelist);
++}
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c
+new file mode 100644
+index 0000000..2596818
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c
+@@ -0,0 +1,2883 @@
++/**
++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved.
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/errno.h>
++#include <linux/cdev.h>
++#include <linux/fs.h>
++#include <linux/device.h>
++#include <linux/mm.h>
++#include <linux/highmem.h>
++#include <linux/pagemap.h>
++#include <linux/bug.h>
++#include <linux/semaphore.h>
++#include <linux/list.h>
++
++#include "vchiq_core.h"
++#include "vchiq_ioctl.h"
++#include "vchiq_arm.h"
++#include "vchiq_debugfs.h"
++
++#define DEVICE_NAME "vchiq"
++
++/* Override the default prefix, which would be vchiq_arm (from the filename) */
++#undef MODULE_PARAM_PREFIX
++#define MODULE_PARAM_PREFIX DEVICE_NAME "."
++
++#define VCHIQ_MINOR 0
++
++/* Some per-instance constants */
++#define MAX_COMPLETIONS 16
++#define MAX_SERVICES 64
++#define MAX_ELEMENTS 8
++#define MSG_QUEUE_SIZE 64
++
++#define KEEPALIVE_VER 1
++#define KEEPALIVE_VER_MIN KEEPALIVE_VER
++
++/* Run time control of log level, based on KERN_XXX level. */
++int vchiq_arm_log_level = VCHIQ_LOG_DEFAULT;
++int vchiq_susp_log_level = VCHIQ_LOG_ERROR;
++
++#define SUSPEND_TIMER_TIMEOUT_MS 100
++#define SUSPEND_RETRY_TIMER_TIMEOUT_MS 1000
++
++#define VC_SUSPEND_NUM_OFFSET 3 /* number of values before idle which are -ve */
++static const char *const suspend_state_names[] = {
++ "VC_SUSPEND_FORCE_CANCELED",
++ "VC_SUSPEND_REJECTED",
++ "VC_SUSPEND_FAILED",
++ "VC_SUSPEND_IDLE",
++ "VC_SUSPEND_REQUESTED",
++ "VC_SUSPEND_IN_PROGRESS",
++ "VC_SUSPEND_SUSPENDED"
++};
++#define VC_RESUME_NUM_OFFSET 1 /* number of values before idle which are -ve */
++static const char *const resume_state_names[] = {
++ "VC_RESUME_FAILED",
++ "VC_RESUME_IDLE",
++ "VC_RESUME_REQUESTED",
++ "VC_RESUME_IN_PROGRESS",
++ "VC_RESUME_RESUMED"
++};
++/* The number of times we allow force suspend to timeout before actually
++** _forcing_ suspend. This is to cater for SW which fails to release vchiq
++** correctly - we don't want to prevent ARM suspend indefinitely in this case.
++*/
++#define FORCE_SUSPEND_FAIL_MAX 8
++
++/* The time in ms allowed for videocore to go idle when force suspend has been
++ * requested */
++#define FORCE_SUSPEND_TIMEOUT_MS 200
++
++
++static void suspend_timer_callback(unsigned long context);
++
++
++typedef struct user_service_struct {
++ VCHIQ_SERVICE_T *service;
++ void *userdata;
++ VCHIQ_INSTANCE_T instance;
++ char is_vchi;
++ char dequeue_pending;
++ char close_pending;
++ int message_available_pos;
++ int msg_insert;
++ int msg_remove;
++ struct semaphore insert_event;
++ struct semaphore remove_event;
++ struct semaphore close_event;
++ VCHIQ_HEADER_T * msg_queue[MSG_QUEUE_SIZE];
++} USER_SERVICE_T;
++
++struct bulk_waiter_node {
++ struct bulk_waiter bulk_waiter;
++ int pid;
++ struct list_head list;
++};
++
++struct vchiq_instance_struct {
++ VCHIQ_STATE_T *state;
++ VCHIQ_COMPLETION_DATA_T completions[MAX_COMPLETIONS];
++ int completion_insert;
++ int completion_remove;
++ struct semaphore insert_event;
++ struct semaphore remove_event;
++ struct mutex completion_mutex;
++
++ int connected;
++ int closing;
++ int pid;
++ int mark;
++ int use_close_delivered;
++ int trace;
++
++ struct list_head bulk_waiter_list;
++ struct mutex bulk_waiter_list_mutex;
++
++ VCHIQ_DEBUGFS_NODE_T debugfs_node;
++};
++
++typedef struct dump_context_struct {
++ char __user *buf;
++ size_t actual;
++ size_t space;
++ loff_t offset;
++} DUMP_CONTEXT_T;
++
++static struct cdev vchiq_cdev;
++static dev_t vchiq_devid;
++static VCHIQ_STATE_T g_state;
++static struct class *vchiq_class;
++static struct device *vchiq_dev;
++static DEFINE_SPINLOCK(msg_queue_spinlock);
++
++static const char *const ioctl_names[] = {
++ "CONNECT",
++ "SHUTDOWN",
++ "CREATE_SERVICE",
++ "REMOVE_SERVICE",
++ "QUEUE_MESSAGE",
++ "QUEUE_BULK_TRANSMIT",
++ "QUEUE_BULK_RECEIVE",
++ "AWAIT_COMPLETION",
++ "DEQUEUE_MESSAGE",
++ "GET_CLIENT_ID",
++ "GET_CONFIG",
++ "CLOSE_SERVICE",
++ "USE_SERVICE",
++ "RELEASE_SERVICE",
++ "SET_SERVICE_OPTION",
++ "DUMP_PHYS_MEM",
++ "LIB_VERSION",
++ "CLOSE_DELIVERED"
++};
++
++vchiq_static_assert((sizeof(ioctl_names)/sizeof(ioctl_names[0])) ==
++ (VCHIQ_IOC_MAX + 1));
++
++static void
++dump_phys_mem(void *virt_addr, uint32_t num_bytes);
++
++/****************************************************************************
++*
++* add_completion
++*
++***************************************************************************/
++
++static VCHIQ_STATUS_T
++add_completion(VCHIQ_INSTANCE_T instance, VCHIQ_REASON_T reason,
++ VCHIQ_HEADER_T *header, USER_SERVICE_T *user_service,
++ void *bulk_userdata)
++{
++ VCHIQ_COMPLETION_DATA_T *completion;
++ DEBUG_INITIALISE(g_state.local)
++
++ while (instance->completion_insert ==
++ (instance->completion_remove + MAX_COMPLETIONS)) {
++ /* Out of space - wait for the client */
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ vchiq_log_trace(vchiq_arm_log_level,
++ "add_completion - completion queue full");
++ DEBUG_COUNT(COMPLETION_QUEUE_FULL_COUNT);
++ if (down_interruptible(&instance->remove_event) != 0) {
++ vchiq_log_info(vchiq_arm_log_level,
++ "service_callback interrupted");
++ return VCHIQ_RETRY;
++ } else if (instance->closing) {
++ vchiq_log_info(vchiq_arm_log_level,
++ "service_callback closing");
++ return VCHIQ_ERROR;
++ }
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ }
++
++ completion =
++ &instance->completions[instance->completion_insert &
++ (MAX_COMPLETIONS - 1)];
++
++ completion->header = header;
++ completion->reason = reason;
++ /* N.B. service_userdata is updated while processing AWAIT_COMPLETION */
++ completion->service_userdata = user_service->service;
++ completion->bulk_userdata = bulk_userdata;
++
++ if (reason == VCHIQ_SERVICE_CLOSED) {
++ /* Take an extra reference, to be held until
++ this CLOSED notification is delivered. */
++ lock_service(user_service->service);
++ if (instance->use_close_delivered)
++ user_service->close_pending = 1;
++ }
++
++ /* A write barrier is needed here to ensure that the entire completion
++ record is written out before the insert point. */
++ wmb();
++
++ if (reason == VCHIQ_MESSAGE_AVAILABLE)
++ user_service->message_available_pos =
++ instance->completion_insert;
++ instance->completion_insert++;
++
++ up(&instance->insert_event);
++
++ return VCHIQ_SUCCESS;
++}
++
++/****************************************************************************
++*
++* service_callback
++*
++***************************************************************************/
++
++static VCHIQ_STATUS_T
++service_callback(VCHIQ_REASON_T reason, VCHIQ_HEADER_T *header,
++ VCHIQ_SERVICE_HANDLE_T handle, void *bulk_userdata)
++{
++ /* How do we ensure the callback goes to the right client?
++ ** The service_user data points to a USER_SERVICE_T record containing
++ ** the original callback and the user state structure, which contains a
++ ** circular buffer for completion records.
++ */
++ USER_SERVICE_T *user_service;
++ VCHIQ_SERVICE_T *service;
++ VCHIQ_INSTANCE_T instance;
++ DEBUG_INITIALISE(g_state.local)
++
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++
++ service = handle_to_service(handle);
++ BUG_ON(!service);
++ user_service = (USER_SERVICE_T *)service->base.userdata;
++ instance = user_service->instance;
++
++ if (!instance || instance->closing)
++ return VCHIQ_SUCCESS;
++
++ vchiq_log_trace(vchiq_arm_log_level,
++ "service_callback - service %lx(%d,%p), reason %d, header %lx, "
++ "instance %lx, bulk_userdata %lx",
++ (unsigned long)user_service,
++ service->localport, user_service->userdata,
++ reason, (unsigned long)header,
++ (unsigned long)instance, (unsigned long)bulk_userdata);
++
++ if (header && user_service->is_vchi) {
++ spin_lock(&msg_queue_spinlock);
++ while (user_service->msg_insert ==
++ (user_service->msg_remove + MSG_QUEUE_SIZE)) {
++ spin_unlock(&msg_queue_spinlock);
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ DEBUG_COUNT(MSG_QUEUE_FULL_COUNT);
++ vchiq_log_trace(vchiq_arm_log_level,
++ "service_callback - msg queue full");
++ /* If there is no MESSAGE_AVAILABLE in the completion
++ ** queue, add one
++ */
++ if ((user_service->message_available_pos -
++ instance->completion_remove) < 0) {
++ VCHIQ_STATUS_T status;
++ vchiq_log_info(vchiq_arm_log_level,
++ "Inserting extra MESSAGE_AVAILABLE");
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ status = add_completion(instance, reason,
++ NULL, user_service, bulk_userdata);
++ if (status != VCHIQ_SUCCESS) {
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ return status;
++ }
++ }
++
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ if (down_interruptible(&user_service->remove_event)
++ != 0) {
++ vchiq_log_info(vchiq_arm_log_level,
++ "service_callback interrupted");
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ return VCHIQ_RETRY;
++ } else if (instance->closing) {
++ vchiq_log_info(vchiq_arm_log_level,
++ "service_callback closing");
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ return VCHIQ_ERROR;
++ }
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ spin_lock(&msg_queue_spinlock);
++ }
++
++ user_service->msg_queue[user_service->msg_insert &
++ (MSG_QUEUE_SIZE - 1)] = header;
++ user_service->msg_insert++;
++ spin_unlock(&msg_queue_spinlock);
++
++ up(&user_service->insert_event);
++
++ /* If there is a thread waiting in DEQUEUE_MESSAGE, or if
++ ** there is a MESSAGE_AVAILABLE in the completion queue then
++ ** bypass the completion queue.
++ */
++ if (((user_service->message_available_pos -
++ instance->completion_remove) >= 0) ||
++ user_service->dequeue_pending) {
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++ user_service->dequeue_pending = 0;
++ return VCHIQ_SUCCESS;
++ }
++
++ header = NULL;
++ }
++ DEBUG_TRACE(SERVICE_CALLBACK_LINE);
++
++ return add_completion(instance, reason, header, user_service,
++ bulk_userdata);
++}
++
++/****************************************************************************
++*
++* user_service_free
++*
++***************************************************************************/
++static void
++user_service_free(void *userdata)
++{
++ kfree(userdata);
++}
++
++/****************************************************************************
++*
++* close_delivered
++*
++***************************************************************************/
++static void close_delivered(USER_SERVICE_T *user_service)
++{
++ vchiq_log_info(vchiq_arm_log_level,
++ "close_delivered(handle=%x)",
++ user_service->service->handle);
++
++ if (user_service->close_pending) {
++ /* Allow the underlying service to be culled */
++ unlock_service(user_service->service);
++
++ /* Wake the user-thread blocked in close_ or remove_service */
++ up(&user_service->close_event);
++
++ user_service->close_pending = 0;
++ }
++}
++
++/****************************************************************************
++*
++* vchiq_ioctl
++*
++***************************************************************************/
++static long
++vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
++{
++ VCHIQ_INSTANCE_T instance = file->private_data;
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++ VCHIQ_SERVICE_T *service = NULL;
++ long ret = 0;
++ int i, rc;
++ DEBUG_INITIALISE(g_state.local)
++
++ vchiq_log_trace(vchiq_arm_log_level,
++ "vchiq_ioctl - instance %x, cmd %s, arg %lx",
++ (unsigned int)instance,
++ ((_IOC_TYPE(cmd) == VCHIQ_IOC_MAGIC) &&
++ (_IOC_NR(cmd) <= VCHIQ_IOC_MAX)) ?
++ ioctl_names[_IOC_NR(cmd)] : "<invalid>", arg);
++
++ switch (cmd) {
++ case VCHIQ_IOC_SHUTDOWN:
++ if (!instance->connected)
++ break;
++
++ /* Remove all services */
++ i = 0;
++ while ((service = next_service_by_instance(instance->state,
++ instance, &i)) != NULL) {
++ status = vchiq_remove_service(service->handle);
++ unlock_service(service);
++ if (status != VCHIQ_SUCCESS)
++ break;
++ }
++ service = NULL;
++
++ if (status == VCHIQ_SUCCESS) {
++ /* Wake the completion thread and ask it to exit */
++ instance->closing = 1;
++ up(&instance->insert_event);
++ }
++
++ break;
++
++ case VCHIQ_IOC_CONNECT:
++ if (instance->connected) {
++ ret = -EINVAL;
++ break;
++ }
++ rc = mutex_lock_interruptible(&instance->state->mutex);
++ if (rc != 0) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "vchiq: connect: could not lock mutex for "
++ "state %d: %d",
++ instance->state->id, rc);
++ ret = -EINTR;
++ break;
++ }
++ status = vchiq_connect_internal(instance->state, instance);
++ mutex_unlock(&instance->state->mutex);
++
++ if (status == VCHIQ_SUCCESS)
++ instance->connected = 1;
++ else
++ vchiq_log_error(vchiq_arm_log_level,
++ "vchiq: could not connect: %d", status);
++ break;
++
++ case VCHIQ_IOC_CREATE_SERVICE: {
++ VCHIQ_CREATE_SERVICE_T args;
++ USER_SERVICE_T *user_service = NULL;
++ void *userdata;
++ int srvstate;
++
++ if (copy_from_user
++ (&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++
++ user_service = kmalloc(sizeof(USER_SERVICE_T), GFP_KERNEL);
++ if (!user_service) {
++ ret = -ENOMEM;
++ break;
++ }
++
++ if (args.is_open) {
++ if (!instance->connected) {
++ ret = -ENOTCONN;
++ kfree(user_service);
++ break;
++ }
++ srvstate = VCHIQ_SRVSTATE_OPENING;
++ } else {
++ srvstate =
++ instance->connected ?
++ VCHIQ_SRVSTATE_LISTENING :
++ VCHIQ_SRVSTATE_HIDDEN;
++ }
++
++ userdata = args.params.userdata;
++ args.params.callback = service_callback;
++ args.params.userdata = user_service;
++ service = vchiq_add_service_internal(
++ instance->state,
++ &args.params, srvstate,
++ instance, user_service_free);
++
++ if (service != NULL) {
++ user_service->service = service;
++ user_service->userdata = userdata;
++ user_service->instance = instance;
++ user_service->is_vchi = (args.is_vchi != 0);
++ user_service->dequeue_pending = 0;
++ user_service->close_pending = 0;
++ user_service->message_available_pos =
++ instance->completion_remove - 1;
++ user_service->msg_insert = 0;
++ user_service->msg_remove = 0;
++ sema_init(&user_service->insert_event, 0);
++ sema_init(&user_service->remove_event, 0);
++ sema_init(&user_service->close_event, 0);
++
++ if (args.is_open) {
++ status = vchiq_open_service_internal
++ (service, instance->pid);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_remove_service(service->handle);
++ service = NULL;
++ ret = (status == VCHIQ_RETRY) ?
++ -EINTR : -EIO;
++ break;
++ }
++ }
++
++ if (copy_to_user((void __user *)
++ &(((VCHIQ_CREATE_SERVICE_T __user *)
++ arg)->handle),
++ (const void *)&service->handle,
++ sizeof(service->handle)) != 0) {
++ ret = -EFAULT;
++ vchiq_remove_service(service->handle);
++ }
++
++ service = NULL;
++ } else {
++ ret = -EEXIST;
++ kfree(user_service);
++ }
++ } break;
++
++ case VCHIQ_IOC_CLOSE_SERVICE: {
++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg;
++
++ service = find_service_for_instance(instance, handle);
++ if (service != NULL) {
++ USER_SERVICE_T *user_service =
++ (USER_SERVICE_T *)service->base.userdata;
++ /* close_pending is false on first entry, and when the
++ wait in vchiq_close_service has been interrupted. */
++ if (!user_service->close_pending) {
++ status = vchiq_close_service(service->handle);
++ if (status != VCHIQ_SUCCESS)
++ break;
++ }
++
++ /* close_pending is true once the underlying service
++ has been closed until the client library calls the
++ CLOSE_DELIVERED ioctl, signalling close_event. */
++ if (user_service->close_pending &&
++ down_interruptible(&user_service->close_event))
++ status = VCHIQ_RETRY;
++ }
++ else
++ ret = -EINVAL;
++ } break;
++
++ case VCHIQ_IOC_REMOVE_SERVICE: {
++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg;
++
++ service = find_service_for_instance(instance, handle);
++ if (service != NULL) {
++ USER_SERVICE_T *user_service =
++ (USER_SERVICE_T *)service->base.userdata;
++ /* close_pending is false on first entry, and when the
++ wait in vchiq_close_service has been interrupted. */
++ if (!user_service->close_pending) {
++ status = vchiq_remove_service(service->handle);
++ if (status != VCHIQ_SUCCESS)
++ break;
++ }
++
++ /* close_pending is true once the underlying service
++ has been closed until the client library calls the
++ CLOSE_DELIVERED ioctl, signalling close_event. */
++ if (user_service->close_pending &&
++ down_interruptible(&user_service->close_event))
++ status = VCHIQ_RETRY;
++ }
++ else
++ ret = -EINVAL;
++ } break;
++
++ case VCHIQ_IOC_USE_SERVICE:
++ case VCHIQ_IOC_RELEASE_SERVICE: {
++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg;
++
++ service = find_service_for_instance(instance, handle);
++ if (service != NULL) {
++ status = (cmd == VCHIQ_IOC_USE_SERVICE) ?
++ vchiq_use_service_internal(service) :
++ vchiq_release_service_internal(service);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s: cmd %s returned error %d for "
++ "service %c%c%c%c:%03d",
++ __func__,
++ (cmd == VCHIQ_IOC_USE_SERVICE) ?
++ "VCHIQ_IOC_USE_SERVICE" :
++ "VCHIQ_IOC_RELEASE_SERVICE",
++ status,
++ VCHIQ_FOURCC_AS_4CHARS(
++ service->base.fourcc),
++ service->client_id);
++ ret = -EINVAL;
++ }
++ } else
++ ret = -EINVAL;
++ } break;
++
++ case VCHIQ_IOC_QUEUE_MESSAGE: {
++ VCHIQ_QUEUE_MESSAGE_T args;
++ if (copy_from_user
++ (&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++
++ service = find_service_for_instance(instance, args.handle);
++
++ if ((service != NULL) && (args.count <= MAX_ELEMENTS)) {
++ /* Copy elements into kernel space */
++ VCHIQ_ELEMENT_T elements[MAX_ELEMENTS];
++ if (copy_from_user(elements, args.elements,
++ args.count * sizeof(VCHIQ_ELEMENT_T)) == 0)
++ status = vchiq_queue_message
++ (args.handle,
++ elements, args.count);
++ else
++ ret = -EFAULT;
++ } else {
++ ret = -EINVAL;
++ }
++ } break;
++
++ case VCHIQ_IOC_QUEUE_BULK_TRANSMIT:
++ case VCHIQ_IOC_QUEUE_BULK_RECEIVE: {
++ VCHIQ_QUEUE_BULK_TRANSFER_T args;
++ struct bulk_waiter_node *waiter = NULL;
++ VCHIQ_BULK_DIR_T dir =
++ (cmd == VCHIQ_IOC_QUEUE_BULK_TRANSMIT) ?
++ VCHIQ_BULK_TRANSMIT : VCHIQ_BULK_RECEIVE;
++
++ if (copy_from_user
++ (&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++
++ service = find_service_for_instance(instance, args.handle);
++ if (!service) {
++ ret = -EINVAL;
++ break;
++ }
++
++ if (args.mode == VCHIQ_BULK_MODE_BLOCKING) {
++ waiter = kzalloc(sizeof(struct bulk_waiter_node),
++ GFP_KERNEL);
++ if (!waiter) {
++ ret = -ENOMEM;
++ break;
++ }
++ args.userdata = &waiter->bulk_waiter;
++ } else if (args.mode == VCHIQ_BULK_MODE_WAITING) {
++ struct list_head *pos;
++ mutex_lock(&instance->bulk_waiter_list_mutex);
++ list_for_each(pos, &instance->bulk_waiter_list) {
++ if (list_entry(pos, struct bulk_waiter_node,
++ list)->pid == current->pid) {
++ waiter = list_entry(pos,
++ struct bulk_waiter_node,
++ list);
++ list_del(pos);
++ break;
++ }
++
++ }
++ mutex_unlock(&instance->bulk_waiter_list_mutex);
++ if (!waiter) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "no bulk_waiter found for pid %d",
++ current->pid);
++ ret = -ESRCH;
++ break;
++ }
++ vchiq_log_info(vchiq_arm_log_level,
++ "found bulk_waiter %x for pid %d",
++ (unsigned int)waiter, current->pid);
++ args.userdata = &waiter->bulk_waiter;
++ }
++ status = vchiq_bulk_transfer
++ (args.handle,
++ VCHI_MEM_HANDLE_INVALID,
++ args.data, args.size,
++ args.userdata, args.mode,
++ dir);
++ if (!waiter)
++ break;
++ if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) ||
++ !waiter->bulk_waiter.bulk) {
++ if (waiter->bulk_waiter.bulk) {
++ /* Cancel the signal when the transfer
++ ** completes. */
++ spin_lock(&bulk_waiter_spinlock);
++ waiter->bulk_waiter.bulk->userdata = NULL;
++ spin_unlock(&bulk_waiter_spinlock);
++ }
++ kfree(waiter);
++ } else {
++ const VCHIQ_BULK_MODE_T mode_waiting =
++ VCHIQ_BULK_MODE_WAITING;
++ waiter->pid = current->pid;
++ mutex_lock(&instance->bulk_waiter_list_mutex);
++ list_add(&waiter->list, &instance->bulk_waiter_list);
++ mutex_unlock(&instance->bulk_waiter_list_mutex);
++ vchiq_log_info(vchiq_arm_log_level,
++ "saved bulk_waiter %x for pid %d",
++ (unsigned int)waiter, current->pid);
++
++ if (copy_to_user((void __user *)
++ &(((VCHIQ_QUEUE_BULK_TRANSFER_T __user *)
++ arg)->mode),
++ (const void *)&mode_waiting,
++ sizeof(mode_waiting)) != 0)
++ ret = -EFAULT;
++ }
++ } break;
++
++ case VCHIQ_IOC_AWAIT_COMPLETION: {
++ VCHIQ_AWAIT_COMPLETION_T args;
++
++ DEBUG_TRACE(AWAIT_COMPLETION_LINE);
++ if (!instance->connected) {
++ ret = -ENOTCONN;
++ break;
++ }
++
++ if (copy_from_user(&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++
++ mutex_lock(&instance->completion_mutex);
++
++ DEBUG_TRACE(AWAIT_COMPLETION_LINE);
++ while ((instance->completion_remove ==
++ instance->completion_insert)
++ && !instance->closing) {
++ int rc;
++ DEBUG_TRACE(AWAIT_COMPLETION_LINE);
++ mutex_unlock(&instance->completion_mutex);
++ rc = down_interruptible(&instance->insert_event);
++ mutex_lock(&instance->completion_mutex);
++ if (rc != 0) {
++ DEBUG_TRACE(AWAIT_COMPLETION_LINE);
++ vchiq_log_info(vchiq_arm_log_level,
++ "AWAIT_COMPLETION interrupted");
++ ret = -EINTR;
++ break;
++ }
++ }
++ DEBUG_TRACE(AWAIT_COMPLETION_LINE);
++
++ /* A read memory barrier is needed to stop prefetch of a stale
++ ** completion record
++ */
++ rmb();
++
++ if (ret == 0) {
++ int msgbufcount = args.msgbufcount;
++ for (ret = 0; ret < args.count; ret++) {
++ VCHIQ_COMPLETION_DATA_T *completion;
++ VCHIQ_SERVICE_T *service;
++ USER_SERVICE_T *user_service;
++ VCHIQ_HEADER_T *header;
++ if (instance->completion_remove ==
++ instance->completion_insert)
++ break;
++ completion = &instance->completions[
++ instance->completion_remove &
++ (MAX_COMPLETIONS - 1)];
++
++ service = completion->service_userdata;
++ user_service = service->base.userdata;
++ completion->service_userdata =
++ user_service->userdata;
++
++ header = completion->header;
++ if (header) {
++ void __user *msgbuf;
++ int msglen;
++
++ msglen = header->size +
++ sizeof(VCHIQ_HEADER_T);
++ /* This must be a VCHIQ-style service */
++ if (args.msgbufsize < msglen) {
++ vchiq_log_error(
++ vchiq_arm_log_level,
++ "header %x: msgbufsize"
++ " %x < msglen %x",
++ (unsigned int)header,
++ args.msgbufsize,
++ msglen);
++ WARN(1, "invalid message "
++ "size\n");
++ if (ret == 0)
++ ret = -EMSGSIZE;
++ break;
++ }
++ if (msgbufcount <= 0)
++ /* Stall here for lack of a
++ ** buffer for the message. */
++ break;
++ /* Get the pointer from user space */
++ msgbufcount--;
++ if (copy_from_user(&msgbuf,
++ (const void __user *)
++ &args.msgbufs[msgbufcount],
++ sizeof(msgbuf)) != 0) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++
++ /* Copy the message to user space */
++ if (copy_to_user(msgbuf, header,
++ msglen) != 0) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++
++ /* Now it has been copied, the message
++ ** can be released. */
++ vchiq_release_message(service->handle,
++ header);
++
++ /* The completion must point to the
++ ** msgbuf. */
++ completion->header = msgbuf;
++ }
++
++ if ((completion->reason ==
++ VCHIQ_SERVICE_CLOSED) &&
++ !instance->use_close_delivered)
++ unlock_service(service);
++
++ if (copy_to_user((void __user *)(
++ (size_t)args.buf +
++ ret * sizeof(VCHIQ_COMPLETION_DATA_T)),
++ completion,
++ sizeof(VCHIQ_COMPLETION_DATA_T)) != 0) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++
++ instance->completion_remove++;
++ }
++
++ if (msgbufcount != args.msgbufcount) {
++ if (copy_to_user((void __user *)
++ &((VCHIQ_AWAIT_COMPLETION_T *)arg)->
++ msgbufcount,
++ &msgbufcount,
++ sizeof(msgbufcount)) != 0) {
++ ret = -EFAULT;
++ }
++ }
++ }
++
++ if (ret != 0)
++ up(&instance->remove_event);
++ mutex_unlock(&instance->completion_mutex);
++ DEBUG_TRACE(AWAIT_COMPLETION_LINE);
++ } break;
++
++ case VCHIQ_IOC_DEQUEUE_MESSAGE: {
++ VCHIQ_DEQUEUE_MESSAGE_T args;
++ USER_SERVICE_T *user_service;
++ VCHIQ_HEADER_T *header;
++
++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
++ if (copy_from_user
++ (&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++ service = find_service_for_instance(instance, args.handle);
++ if (!service) {
++ ret = -EINVAL;
++ break;
++ }
++ user_service = (USER_SERVICE_T *)service->base.userdata;
++ if (user_service->is_vchi == 0) {
++ ret = -EINVAL;
++ break;
++ }
++
++ spin_lock(&msg_queue_spinlock);
++ if (user_service->msg_remove == user_service->msg_insert) {
++ if (!args.blocking) {
++ spin_unlock(&msg_queue_spinlock);
++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
++ ret = -EWOULDBLOCK;
++ break;
++ }
++ user_service->dequeue_pending = 1;
++ do {
++ spin_unlock(&msg_queue_spinlock);
++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
++ if (down_interruptible(
++ &user_service->insert_event) != 0) {
++ vchiq_log_info(vchiq_arm_log_level,
++ "DEQUEUE_MESSAGE interrupted");
++ ret = -EINTR;
++ break;
++ }
++ spin_lock(&msg_queue_spinlock);
++ } while (user_service->msg_remove ==
++ user_service->msg_insert);
++
++ if (ret)
++ break;
++ }
++
++ BUG_ON((int)(user_service->msg_insert -
++ user_service->msg_remove) < 0);
++
++ header = user_service->msg_queue[user_service->msg_remove &
++ (MSG_QUEUE_SIZE - 1)];
++ user_service->msg_remove++;
++ spin_unlock(&msg_queue_spinlock);
++
++ up(&user_service->remove_event);
++ if (header == NULL)
++ ret = -ENOTCONN;
++ else if (header->size <= args.bufsize) {
++ /* Copy to user space if msgbuf is not NULL */
++ if ((args.buf == NULL) ||
++ (copy_to_user((void __user *)args.buf,
++ header->data,
++ header->size) == 0)) {
++ ret = header->size;
++ vchiq_release_message(
++ service->handle,
++ header);
++ } else
++ ret = -EFAULT;
++ } else {
++ vchiq_log_error(vchiq_arm_log_level,
++ "header %x: bufsize %x < size %x",
++ (unsigned int)header, args.bufsize,
++ header->size);
++ WARN(1, "invalid size\n");
++ ret = -EMSGSIZE;
++ }
++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE);
++ } break;
++
++ case VCHIQ_IOC_GET_CLIENT_ID: {
++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg;
++
++ ret = vchiq_get_client_id(handle);
++ } break;
++
++ case VCHIQ_IOC_GET_CONFIG: {
++ VCHIQ_GET_CONFIG_T args;
++ VCHIQ_CONFIG_T config;
++
++ if (copy_from_user(&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++ if (args.config_size > sizeof(config)) {
++ ret = -EINVAL;
++ break;
++ }
++ status = vchiq_get_config(instance, args.config_size, &config);
++ if (status == VCHIQ_SUCCESS) {
++ if (copy_to_user((void __user *)args.pconfig,
++ &config, args.config_size) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++ }
++ } break;
++
++ case VCHIQ_IOC_SET_SERVICE_OPTION: {
++ VCHIQ_SET_SERVICE_OPTION_T args;
++
++ if (copy_from_user(
++ &args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++
++ service = find_service_for_instance(instance, args.handle);
++ if (!service) {
++ ret = -EINVAL;
++ break;
++ }
++
++ status = vchiq_set_service_option(
++ args.handle, args.option, args.value);
++ } break;
++
++ case VCHIQ_IOC_DUMP_PHYS_MEM: {
++ VCHIQ_DUMP_MEM_T args;
++
++ if (copy_from_user
++ (&args, (const void __user *)arg,
++ sizeof(args)) != 0) {
++ ret = -EFAULT;
++ break;
++ }
++ dump_phys_mem(args.virt_addr, args.num_bytes);
++ } break;
++
++ case VCHIQ_IOC_LIB_VERSION: {
++ unsigned int lib_version = (unsigned int)arg;
++
++ if (lib_version < VCHIQ_VERSION_MIN)
++ ret = -EINVAL;
++ else if (lib_version >= VCHIQ_VERSION_CLOSE_DELIVERED)
++ instance->use_close_delivered = 1;
++ } break;
++
++ case VCHIQ_IOC_CLOSE_DELIVERED: {
++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg;
++
++ service = find_closed_service_for_instance(instance, handle);
++ if (service != NULL) {
++ USER_SERVICE_T *user_service =
++ (USER_SERVICE_T *)service->base.userdata;
++ close_delivered(user_service);
++ }
++ else
++ ret = -EINVAL;
++ } break;
++
++ default:
++ ret = -ENOTTY;
++ break;
++ }
++
++ if (service)
++ unlock_service(service);
++
++ if (ret == 0) {
++ if (status == VCHIQ_ERROR)
++ ret = -EIO;
++ else if (status == VCHIQ_RETRY)
++ ret = -EINTR;
++ }
++
++ if ((status == VCHIQ_SUCCESS) && (ret < 0) && (ret != -EINTR) &&
++ (ret != -EWOULDBLOCK))
++ vchiq_log_info(vchiq_arm_log_level,
++ " ioctl instance %lx, cmd %s -> status %d, %ld",
++ (unsigned long)instance,
++ (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?
++ ioctl_names[_IOC_NR(cmd)] :
++ "<invalid>",
++ status, ret);
++ else
++ vchiq_log_trace(vchiq_arm_log_level,
++ " ioctl instance %lx, cmd %s -> status %d, %ld",
++ (unsigned long)instance,
++ (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?
++ ioctl_names[_IOC_NR(cmd)] :
++ "<invalid>",
++ status, ret);
++
++ return ret;
++}
++
++/****************************************************************************
++*
++* vchiq_open
++*
++***************************************************************************/
++
++static int
++vchiq_open(struct inode *inode, struct file *file)
++{
++ int dev = iminor(inode) & 0x0f;
++ vchiq_log_info(vchiq_arm_log_level, "vchiq_open");
++ switch (dev) {
++ case VCHIQ_MINOR: {
++ int ret;
++ VCHIQ_STATE_T *state = vchiq_get_state();
++ VCHIQ_INSTANCE_T instance;
++
++ if (!state) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "vchiq has no connection to VideoCore");
++ return -ENOTCONN;
++ }
++
++ instance = kzalloc(sizeof(*instance), GFP_KERNEL);
++ if (!instance)
++ return -ENOMEM;
++
++ instance->state = state;
++ instance->pid = current->tgid;
++
++ ret = vchiq_debugfs_add_instance(instance);
++ if (ret != 0) {
++ kfree(instance);
++ return ret;
++ }
++
++ sema_init(&instance->insert_event, 0);
++ sema_init(&instance->remove_event, 0);
++ mutex_init(&instance->completion_mutex);
++ mutex_init(&instance->bulk_waiter_list_mutex);
++ INIT_LIST_HEAD(&instance->bulk_waiter_list);
++
++ file->private_data = instance;
++ } break;
++
++ default:
++ vchiq_log_error(vchiq_arm_log_level,
++ "Unknown minor device: %d", dev);
++ return -ENXIO;
++ }
++
++ return 0;
++}
++
++/****************************************************************************
++*
++* vchiq_release
++*
++***************************************************************************/
++
++static int
++vchiq_release(struct inode *inode, struct file *file)
++{
++ int dev = iminor(inode) & 0x0f;
++ int ret = 0;
++ switch (dev) {
++ case VCHIQ_MINOR: {
++ VCHIQ_INSTANCE_T instance = file->private_data;
++ VCHIQ_STATE_T *state = vchiq_get_state();
++ VCHIQ_SERVICE_T *service;
++ int i;
++
++ vchiq_log_info(vchiq_arm_log_level,
++ "vchiq_release: instance=%lx",
++ (unsigned long)instance);
++
++ if (!state) {
++ ret = -EPERM;
++ goto out;
++ }
++
++ /* Ensure videocore is awake to allow termination. */
++ vchiq_use_internal(instance->state, NULL,
++ USE_TYPE_VCHIQ);
++
++ mutex_lock(&instance->completion_mutex);
++
++ /* Wake the completion thread and ask it to exit */
++ instance->closing = 1;
++ up(&instance->insert_event);
++
++ mutex_unlock(&instance->completion_mutex);
++
++ /* Wake the slot handler if the completion queue is full. */
++ up(&instance->remove_event);
++
++ /* Mark all services for termination... */
++ i = 0;
++ while ((service = next_service_by_instance(state, instance,
++ &i)) != NULL) {
++ USER_SERVICE_T *user_service = service->base.userdata;
++
++ /* Wake the slot handler if the msg queue is full. */
++ up(&user_service->remove_event);
++
++ vchiq_terminate_service_internal(service);
++ unlock_service(service);
++ }
++
++ /* ...and wait for them to die */
++ i = 0;
++ while ((service = next_service_by_instance(state, instance, &i))
++ != NULL) {
++ USER_SERVICE_T *user_service = service->base.userdata;
++
++ down(&service->remove_event);
++
++ BUG_ON(service->srvstate != VCHIQ_SRVSTATE_FREE);
++
++ spin_lock(&msg_queue_spinlock);
++
++ while (user_service->msg_remove !=
++ user_service->msg_insert) {
++ VCHIQ_HEADER_T *header = user_service->
++ msg_queue[user_service->msg_remove &
++ (MSG_QUEUE_SIZE - 1)];
++ user_service->msg_remove++;
++ spin_unlock(&msg_queue_spinlock);
++
++ if (header)
++ vchiq_release_message(
++ service->handle,
++ header);
++ spin_lock(&msg_queue_spinlock);
++ }
++
++ spin_unlock(&msg_queue_spinlock);
++
++ unlock_service(service);
++ }
++
++ /* Release any closed services */
++ while (instance->completion_remove !=
++ instance->completion_insert) {
++ VCHIQ_COMPLETION_DATA_T *completion;
++ VCHIQ_SERVICE_T *service;
++ completion = &instance->completions[
++ instance->completion_remove &
++ (MAX_COMPLETIONS - 1)];
++ service = completion->service_userdata;
++ if (completion->reason == VCHIQ_SERVICE_CLOSED)
++ {
++ USER_SERVICE_T *user_service =
++ service->base.userdata;
++
++ /* Wake any blocked user-thread */
++ if (instance->use_close_delivered)
++ up(&user_service->close_event);
++ unlock_service(service);
++ }
++ instance->completion_remove++;
++ }
++
++ /* Release the PEER service count. */
++ vchiq_release_internal(instance->state, NULL);
++
++ {
++ struct list_head *pos, *next;
++ list_for_each_safe(pos, next,
++ &instance->bulk_waiter_list) {
++ struct bulk_waiter_node *waiter;
++ waiter = list_entry(pos,
++ struct bulk_waiter_node,
++ list);
++ list_del(pos);
++ vchiq_log_info(vchiq_arm_log_level,
++ "bulk_waiter - cleaned up %x "
++ "for pid %d",
++ (unsigned int)waiter, waiter->pid);
++ kfree(waiter);
++ }
++ }
++
++ vchiq_debugfs_remove_instance(instance);
++
++ kfree(instance);
++ file->private_data = NULL;
++ } break;
++
++ default:
++ vchiq_log_error(vchiq_arm_log_level,
++ "Unknown minor device: %d", dev);
++ ret = -ENXIO;
++ }
++
++out:
++ return ret;
++}
++
++/****************************************************************************
++*
++* vchiq_dump
++*
++***************************************************************************/
++
++void
++vchiq_dump(void *dump_context, const char *str, int len)
++{
++ DUMP_CONTEXT_T *context = (DUMP_CONTEXT_T *)dump_context;
++
++ if (context->actual < context->space) {
++ int copy_bytes;
++ if (context->offset > 0) {
++ int skip_bytes = min(len, (int)context->offset);
++ str += skip_bytes;
++ len -= skip_bytes;
++ context->offset -= skip_bytes;
++ if (context->offset > 0)
++ return;
++ }
++ copy_bytes = min(len, (int)(context->space - context->actual));
++ if (copy_bytes == 0)
++ return;
++ if (copy_to_user(context->buf + context->actual, str,
++ copy_bytes))
++ context->actual = -EFAULT;
++ context->actual += copy_bytes;
++ len -= copy_bytes;
++
++ /* If tne terminating NUL is included in the length, then it
++ ** marks the end of a line and should be replaced with a
++ ** carriage return. */
++ if ((len == 0) && (str[copy_bytes - 1] == '\0')) {
++ char cr = '\n';
++ if (copy_to_user(context->buf + context->actual - 1,
++ &cr, 1))
++ context->actual = -EFAULT;
++ }
++ }
++}
++
++/****************************************************************************
++*
++* vchiq_dump_platform_instance_state
++*
++***************************************************************************/
++
++void
++vchiq_dump_platform_instances(void *dump_context)
++{
++ VCHIQ_STATE_T *state = vchiq_get_state();
++ char buf[80];
++ int len;
++ int i;
++
++ /* There is no list of instances, so instead scan all services,
++ marking those that have been dumped. */
++
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *service = state->services[i];
++ VCHIQ_INSTANCE_T instance;
++
++ if (service && (service->base.callback == service_callback)) {
++ instance = service->instance;
++ if (instance)
++ instance->mark = 0;
++ }
++ }
++
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *service = state->services[i];
++ VCHIQ_INSTANCE_T instance;
++
++ if (service && (service->base.callback == service_callback)) {
++ instance = service->instance;
++ if (instance && !instance->mark) {
++ len = snprintf(buf, sizeof(buf),
++ "Instance %x: pid %d,%s completions "
++ "%d/%d",
++ (unsigned int)instance, instance->pid,
++ instance->connected ? " connected, " :
++ "",
++ instance->completion_insert -
++ instance->completion_remove,
++ MAX_COMPLETIONS);
++
++ vchiq_dump(dump_context, buf, len + 1);
++
++ instance->mark = 1;
++ }
++ }
++ }
++}
++
++/****************************************************************************
++*
++* vchiq_dump_platform_service_state
++*
++***************************************************************************/
++
++void
++vchiq_dump_platform_service_state(void *dump_context, VCHIQ_SERVICE_T *service)
++{
++ USER_SERVICE_T *user_service = (USER_SERVICE_T *)service->base.userdata;
++ char buf[80];
++ int len;
++
++ len = snprintf(buf, sizeof(buf), " instance %x",
++ (unsigned int)service->instance);
++
++ if ((service->base.callback == service_callback) &&
++ user_service->is_vchi) {
++ len += snprintf(buf + len, sizeof(buf) - len,
++ ", %d/%d messages",
++ user_service->msg_insert - user_service->msg_remove,
++ MSG_QUEUE_SIZE);
++
++ if (user_service->dequeue_pending)
++ len += snprintf(buf + len, sizeof(buf) - len,
++ " (dequeue pending)");
++ }
++
++ vchiq_dump(dump_context, buf, len + 1);
++}
++
++/****************************************************************************
++*
++* dump_user_mem
++*
++***************************************************************************/
++
++static void
++dump_phys_mem(void *virt_addr, uint32_t num_bytes)
++{
++ int rc;
++ uint8_t *end_virt_addr = virt_addr + num_bytes;
++ int num_pages;
++ int offset;
++ int end_offset;
++ int page_idx;
++ int prev_idx;
++ struct page *page;
++ struct page **pages;
++ uint8_t *kmapped_virt_ptr;
++
++ /* Align virtAddr and endVirtAddr to 16 byte boundaries. */
++
++ virt_addr = (void *)((unsigned long)virt_addr & ~0x0fuL);
++ end_virt_addr = (void *)(((unsigned long)end_virt_addr + 15uL) &
++ ~0x0fuL);
++
++ offset = (int)(long)virt_addr & (PAGE_SIZE - 1);
++ end_offset = (int)(long)end_virt_addr & (PAGE_SIZE - 1);
++
++ num_pages = (offset + num_bytes + PAGE_SIZE - 1) / PAGE_SIZE;
++
++ pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL);
++ if (pages == NULL) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "Unable to allocation memory for %d pages\n",
++ num_pages);
++ return;
++ }
++
++ down_read(¤t->mm->mmap_sem);
++ rc = get_user_pages(current, /* task */
++ current->mm, /* mm */
++ (unsigned long)virt_addr, /* start */
++ num_pages, /* len */
++ 0, /* write */
++ 0, /* force */
++ pages, /* pages (array of page pointers) */
++ NULL); /* vmas */
++ up_read(¤t->mm->mmap_sem);
++
++ prev_idx = -1;
++ page = NULL;
++
++ while (offset < end_offset) {
++
++ int page_offset = offset % PAGE_SIZE;
++ page_idx = offset / PAGE_SIZE;
++
++ if (page_idx != prev_idx) {
++
++ if (page != NULL)
++ kunmap(page);
++ page = pages[page_idx];
++ kmapped_virt_ptr = kmap(page);
++
++ prev_idx = page_idx;
++ }
++
++ if (vchiq_arm_log_level >= VCHIQ_LOG_TRACE)
++ vchiq_log_dump_mem("ph",
++ (uint32_t)(unsigned long)&kmapped_virt_ptr[
++ page_offset],
++ &kmapped_virt_ptr[page_offset], 16);
++
++ offset += 16;
++ }
++ if (page != NULL)
++ kunmap(page);
++
++ for (page_idx = 0; page_idx < num_pages; page_idx++)
++ page_cache_release(pages[page_idx]);
++
++ kfree(pages);
++}
++
++/****************************************************************************
++*
++* vchiq_read
++*
++***************************************************************************/
++
++static ssize_t
++vchiq_read(struct file *file, char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ DUMP_CONTEXT_T context;
++ context.buf = buf;
++ context.actual = 0;
++ context.space = count;
++ context.offset = *ppos;
++
++ vchiq_dump_state(&context, &g_state);
++
++ *ppos += context.actual;
++
++ return context.actual;
++}
++
++VCHIQ_STATE_T *
++vchiq_get_state(void)
++{
++
++ if (g_state.remote == NULL)
++ printk(KERN_ERR "%s: g_state.remote == NULL\n", __func__);
++ else if (g_state.remote->initialised != 1)
++ printk(KERN_NOTICE "%s: g_state.remote->initialised != 1 (%d)\n",
++ __func__, g_state.remote->initialised);
++
++ return ((g_state.remote != NULL) &&
++ (g_state.remote->initialised == 1)) ? &g_state : NULL;
++}
++
++static const struct file_operations
++vchiq_fops = {
++ .owner = THIS_MODULE,
++ .unlocked_ioctl = vchiq_ioctl,
++ .open = vchiq_open,
++ .release = vchiq_release,
++ .read = vchiq_read
++};
++
++/*
++ * Autosuspend related functionality
++ */
++
++int
++vchiq_videocore_wanted(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ if (!arm_state)
++ /* autosuspend not supported - always return wanted */
++ return 1;
++ else if (arm_state->blocked_count)
++ return 1;
++ else if (!arm_state->videocore_use_count)
++ /* usage count zero - check for override unless we're forcing */
++ if (arm_state->resume_blocked)
++ return 0;
++ else
++ return vchiq_platform_videocore_wanted(state);
++ else
++ /* non-zero usage count - videocore still required */
++ return 1;
++}
++
++static VCHIQ_STATUS_T
++vchiq_keepalive_vchiq_callback(VCHIQ_REASON_T reason,
++ VCHIQ_HEADER_T *header,
++ VCHIQ_SERVICE_HANDLE_T service_user,
++ void *bulk_user)
++{
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s callback reason %d", __func__, reason);
++ return 0;
++}
++
++static int
++vchiq_keepalive_thread_func(void *v)
++{
++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v;
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++
++ VCHIQ_STATUS_T status;
++ VCHIQ_INSTANCE_T instance;
++ VCHIQ_SERVICE_HANDLE_T ka_handle;
++
++ VCHIQ_SERVICE_PARAMS_T params = {
++ .fourcc = VCHIQ_MAKE_FOURCC('K', 'E', 'E', 'P'),
++ .callback = vchiq_keepalive_vchiq_callback,
++ .version = KEEPALIVE_VER,
++ .version_min = KEEPALIVE_VER_MIN
++ };
++
++ status = vchiq_initialise(&instance);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s vchiq_initialise failed %d", __func__, status);
++ goto exit;
++ }
++
++ status = vchiq_connect(instance);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s vchiq_connect failed %d", __func__, status);
++ goto shutdown;
++ }
++
++ status = vchiq_add_service(instance, ¶ms, &ka_handle);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s vchiq_open_service failed %d", __func__, status);
++ goto shutdown;
++ }
++
++ while (1) {
++ long rc = 0, uc = 0;
++ if (wait_for_completion_interruptible(&arm_state->ka_evt)
++ != 0) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s interrupted", __func__);
++ flush_signals(current);
++ continue;
++ }
++
++ /* read and clear counters. Do release_count then use_count to
++ * prevent getting more releases than uses */
++ rc = atomic_xchg(&arm_state->ka_release_count, 0);
++ uc = atomic_xchg(&arm_state->ka_use_count, 0);
++
++ /* Call use/release service the requisite number of times.
++ * Process use before release so use counts don't go negative */
++ while (uc--) {
++ atomic_inc(&arm_state->ka_use_ack_count);
++ status = vchiq_use_service(ka_handle);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s vchiq_use_service error %d",
++ __func__, status);
++ }
++ }
++ while (rc--) {
++ status = vchiq_release_service(ka_handle);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s vchiq_release_service error %d",
++ __func__, status);
++ }
++ }
++ }
++
++shutdown:
++ vchiq_shutdown(instance);
++exit:
++ return 0;
++}
++
++
++
++VCHIQ_STATUS_T
++vchiq_arm_init_state(VCHIQ_STATE_T *state, VCHIQ_ARM_STATE_T *arm_state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ if (arm_state) {
++ rwlock_init(&arm_state->susp_res_lock);
++
++ init_completion(&arm_state->ka_evt);
++ atomic_set(&arm_state->ka_use_count, 0);
++ atomic_set(&arm_state->ka_use_ack_count, 0);
++ atomic_set(&arm_state->ka_release_count, 0);
++
++ init_completion(&arm_state->vc_suspend_complete);
++
++ init_completion(&arm_state->vc_resume_complete);
++ /* Initialise to 'done' state. We only want to block on resume
++ * completion while videocore is suspended. */
++ set_resume_state(arm_state, VC_RESUME_RESUMED);
++
++ init_completion(&arm_state->resume_blocker);
++ /* Initialise to 'done' state. We only want to block on this
++ * completion while resume is blocked */
++ complete_all(&arm_state->resume_blocker);
++
++ init_completion(&arm_state->blocked_blocker);
++ /* Initialise to 'done' state. We only want to block on this
++ * completion while things are waiting on the resume blocker */
++ complete_all(&arm_state->blocked_blocker);
++
++ arm_state->suspend_timer_timeout = SUSPEND_TIMER_TIMEOUT_MS;
++ arm_state->suspend_timer_running = 0;
++ init_timer(&arm_state->suspend_timer);
++ arm_state->suspend_timer.data = (unsigned long)(state);
++ arm_state->suspend_timer.function = suspend_timer_callback;
++
++ arm_state->first_connect = 0;
++
++ }
++ return status;
++}
++
++/*
++** Functions to modify the state variables;
++** set_suspend_state
++** set_resume_state
++**
++** There are more state variables than we might like, so ensure they remain in
++** step. Suspend and resume state are maintained separately, since most of
++** these state machines can operate independently. However, there are a few
++** states where state transitions in one state machine cause a reset to the
++** other state machine. In addition, there are some completion events which
++** need to occur on state machine reset and end-state(s), so these are also
++** dealt with in these functions.
++**
++** In all states we set the state variable according to the input, but in some
++** cases we perform additional steps outlined below;
++**
++** VC_SUSPEND_IDLE - Initialise the suspend completion at the same time.
++** The suspend completion is completed after any suspend
++** attempt. When we reset the state machine we also reset
++** the completion. This reset occurs when videocore is
++** resumed, and also if we initiate suspend after a suspend
++** failure.
++**
++** VC_SUSPEND_IN_PROGRESS - This state is considered the point of no return for
++** suspend - ie from this point on we must try to suspend
++** before resuming can occur. We therefore also reset the
++** resume state machine to VC_RESUME_IDLE in this state.
++**
++** VC_SUSPEND_SUSPENDED - Suspend has completed successfully. Also call
++** complete_all on the suspend completion to notify
++** anything waiting for suspend to happen.
++**
++** VC_SUSPEND_REJECTED - Videocore rejected suspend. Videocore will also
++** initiate resume, so no need to alter resume state.
++** We call complete_all on the suspend completion to notify
++** of suspend rejection.
++**
++** VC_SUSPEND_FAILED - We failed to initiate videocore suspend. We notify the
++** suspend completion and reset the resume state machine.
++**
++** VC_RESUME_IDLE - Initialise the resume completion at the same time. The
++** resume completion is in it's 'done' state whenever
++** videcore is running. Therfore, the VC_RESUME_IDLE state
++** implies that videocore is suspended.
++** Hence, any thread which needs to wait until videocore is
++** running can wait on this completion - it will only block
++** if videocore is suspended.
++**
++** VC_RESUME_RESUMED - Resume has completed successfully. Videocore is running.
++** Call complete_all on the resume completion to unblock
++** any threads waiting for resume. Also reset the suspend
++** state machine to it's idle state.
++**
++** VC_RESUME_FAILED - Currently unused - no mechanism to fail resume exists.
++*/
++
++inline void
++set_suspend_state(VCHIQ_ARM_STATE_T *arm_state,
++ enum vc_suspend_status new_state)
++{
++ /* set the state in all cases */
++ arm_state->vc_suspend_state = new_state;
++
++ /* state specific additional actions */
++ switch (new_state) {
++ case VC_SUSPEND_FORCE_CANCELED:
++ complete_all(&arm_state->vc_suspend_complete);
++ break;
++ case VC_SUSPEND_REJECTED:
++ complete_all(&arm_state->vc_suspend_complete);
++ break;
++ case VC_SUSPEND_FAILED:
++ complete_all(&arm_state->vc_suspend_complete);
++ arm_state->vc_resume_state = VC_RESUME_RESUMED;
++ complete_all(&arm_state->vc_resume_complete);
++ break;
++ case VC_SUSPEND_IDLE:
++ reinit_completion(&arm_state->vc_suspend_complete);
++ break;
++ case VC_SUSPEND_REQUESTED:
++ break;
++ case VC_SUSPEND_IN_PROGRESS:
++ set_resume_state(arm_state, VC_RESUME_IDLE);
++ break;
++ case VC_SUSPEND_SUSPENDED:
++ complete_all(&arm_state->vc_suspend_complete);
++ break;
++ default:
++ BUG();
++ break;
++ }
++}
++
++inline void
++set_resume_state(VCHIQ_ARM_STATE_T *arm_state,
++ enum vc_resume_status new_state)
++{
++ /* set the state in all cases */
++ arm_state->vc_resume_state = new_state;
++
++ /* state specific additional actions */
++ switch (new_state) {
++ case VC_RESUME_FAILED:
++ break;
++ case VC_RESUME_IDLE:
++ reinit_completion(&arm_state->vc_resume_complete);
++ break;
++ case VC_RESUME_REQUESTED:
++ break;
++ case VC_RESUME_IN_PROGRESS:
++ break;
++ case VC_RESUME_RESUMED:
++ complete_all(&arm_state->vc_resume_complete);
++ set_suspend_state(arm_state, VC_SUSPEND_IDLE);
++ break;
++ default:
++ BUG();
++ break;
++ }
++}
++
++
++/* should be called with the write lock held */
++inline void
++start_suspend_timer(VCHIQ_ARM_STATE_T *arm_state)
++{
++ del_timer(&arm_state->suspend_timer);
++ arm_state->suspend_timer.expires = jiffies +
++ msecs_to_jiffies(arm_state->
++ suspend_timer_timeout);
++ add_timer(&arm_state->suspend_timer);
++ arm_state->suspend_timer_running = 1;
++}
++
++/* should be called with the write lock held */
++static inline void
++stop_suspend_timer(VCHIQ_ARM_STATE_T *arm_state)
++{
++ if (arm_state->suspend_timer_running) {
++ del_timer(&arm_state->suspend_timer);
++ arm_state->suspend_timer_running = 0;
++ }
++}
++
++static inline int
++need_resume(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ return (arm_state->vc_suspend_state > VC_SUSPEND_IDLE) &&
++ (arm_state->vc_resume_state < VC_RESUME_REQUESTED) &&
++ vchiq_videocore_wanted(state);
++}
++
++static int
++block_resume(VCHIQ_ARM_STATE_T *arm_state)
++{
++ int status = VCHIQ_SUCCESS;
++ const unsigned long timeout_val =
++ msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS);
++ int resume_count = 0;
++
++ /* Allow any threads which were blocked by the last force suspend to
++ * complete if they haven't already. Only give this one shot; if
++ * blocked_count is incremented after blocked_blocker is completed
++ * (which only happens when blocked_count hits 0) then those threads
++ * will have to wait until next time around */
++ if (arm_state->blocked_count) {
++ reinit_completion(&arm_state->blocked_blocker);
++ write_unlock_bh(&arm_state->susp_res_lock);
++ vchiq_log_info(vchiq_susp_log_level, "%s wait for previously "
++ "blocked clients", __func__);
++ if (wait_for_completion_interruptible_timeout(
++ &arm_state->blocked_blocker, timeout_val)
++ <= 0) {
++ vchiq_log_error(vchiq_susp_log_level, "%s wait for "
++ "previously blocked clients failed" , __func__);
++ status = VCHIQ_ERROR;
++ write_lock_bh(&arm_state->susp_res_lock);
++ goto out;
++ }
++ vchiq_log_info(vchiq_susp_log_level, "%s previously blocked "
++ "clients resumed", __func__);
++ write_lock_bh(&arm_state->susp_res_lock);
++ }
++
++ /* We need to wait for resume to complete if it's in process */
++ while (arm_state->vc_resume_state != VC_RESUME_RESUMED &&
++ arm_state->vc_resume_state > VC_RESUME_IDLE) {
++ if (resume_count > 1) {
++ status = VCHIQ_ERROR;
++ vchiq_log_error(vchiq_susp_log_level, "%s waited too "
++ "many times for resume" , __func__);
++ goto out;
++ }
++ write_unlock_bh(&arm_state->susp_res_lock);
++ vchiq_log_info(vchiq_susp_log_level, "%s wait for resume",
++ __func__);
++ if (wait_for_completion_interruptible_timeout(
++ &arm_state->vc_resume_complete, timeout_val)
++ <= 0) {
++ vchiq_log_error(vchiq_susp_log_level, "%s wait for "
++ "resume failed (%s)", __func__,
++ resume_state_names[arm_state->vc_resume_state +
++ VC_RESUME_NUM_OFFSET]);
++ status = VCHIQ_ERROR;
++ write_lock_bh(&arm_state->susp_res_lock);
++ goto out;
++ }
++ vchiq_log_info(vchiq_susp_log_level, "%s resumed", __func__);
++ write_lock_bh(&arm_state->susp_res_lock);
++ resume_count++;
++ }
++ reinit_completion(&arm_state->resume_blocker);
++ arm_state->resume_blocked = 1;
++
++out:
++ return status;
++}
++
++static inline void
++unblock_resume(VCHIQ_ARM_STATE_T *arm_state)
++{
++ complete_all(&arm_state->resume_blocker);
++ arm_state->resume_blocked = 0;
++}
++
++/* Initiate suspend via slot handler. Should be called with the write lock
++ * held */
++VCHIQ_STATUS_T
++vchiq_arm_vcsuspend(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++ status = VCHIQ_SUCCESS;
++
++
++ switch (arm_state->vc_suspend_state) {
++ case VC_SUSPEND_REQUESTED:
++ vchiq_log_info(vchiq_susp_log_level, "%s: suspend already "
++ "requested", __func__);
++ break;
++ case VC_SUSPEND_IN_PROGRESS:
++ vchiq_log_info(vchiq_susp_log_level, "%s: suspend already in "
++ "progress", __func__);
++ break;
++
++ default:
++ /* We don't expect to be in other states, so log but continue
++ * anyway */
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s unexpected suspend state %s", __func__,
++ suspend_state_names[arm_state->vc_suspend_state +
++ VC_SUSPEND_NUM_OFFSET]);
++ /* fall through */
++ case VC_SUSPEND_REJECTED:
++ case VC_SUSPEND_FAILED:
++ /* Ensure any idle state actions have been run */
++ set_suspend_state(arm_state, VC_SUSPEND_IDLE);
++ /* fall through */
++ case VC_SUSPEND_IDLE:
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s: suspending", __func__);
++ set_suspend_state(arm_state, VC_SUSPEND_REQUESTED);
++ /* kick the slot handler thread to initiate suspend */
++ request_poll(state, NULL, 0);
++ break;
++ }
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, status);
++ return status;
++}
++
++void
++vchiq_platform_check_suspend(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ int susp = 0;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (arm_state->vc_suspend_state == VC_SUSPEND_REQUESTED &&
++ arm_state->vc_resume_state == VC_RESUME_RESUMED) {
++ set_suspend_state(arm_state, VC_SUSPEND_IN_PROGRESS);
++ susp = 1;
++ }
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++ if (susp)
++ vchiq_platform_suspend(state);
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
++ return;
++}
++
++
++static void
++output_timeout_error(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ char service_err[50] = "";
++ int vc_use_count = arm_state->videocore_use_count;
++ int active_services = state->unused_service;
++ int i;
++
++ if (!arm_state->videocore_use_count) {
++ snprintf(service_err, 50, " Videocore usecount is 0");
++ goto output_msg;
++ }
++ for (i = 0; i < active_services; i++) {
++ VCHIQ_SERVICE_T *service_ptr = state->services[i];
++ if (service_ptr && service_ptr->service_use_count &&
++ (service_ptr->srvstate != VCHIQ_SRVSTATE_FREE)) {
++ snprintf(service_err, 50, " %c%c%c%c(%d) service has "
++ "use count %d%s", VCHIQ_FOURCC_AS_4CHARS(
++ service_ptr->base.fourcc),
++ service_ptr->client_id,
++ service_ptr->service_use_count,
++ service_ptr->service_use_count ==
++ vc_use_count ? "" : " (+ more)");
++ break;
++ }
++ }
++
++output_msg:
++ vchiq_log_error(vchiq_susp_log_level,
++ "timed out waiting for vc suspend (%d).%s",
++ arm_state->autosuspend_override, service_err);
++
++}
++
++/* Try to get videocore into suspended state, regardless of autosuspend state.
++** We don't actually force suspend, since videocore may get into a bad state
++** if we force suspend at a bad time. Instead, we wait for autosuspend to
++** determine a good point to suspend. If this doesn't happen within 100ms we
++** report failure.
++**
++** Returns VCHIQ_SUCCESS if videocore suspended successfully, VCHIQ_RETRY if
++** videocore failed to suspend in time or VCHIQ_ERROR if interrupted.
++*/
++VCHIQ_STATUS_T
++vchiq_arm_force_suspend(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++ long rc = 0;
++ int repeat = -1;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ write_lock_bh(&arm_state->susp_res_lock);
++
++ status = block_resume(arm_state);
++ if (status != VCHIQ_SUCCESS)
++ goto unlock;
++ if (arm_state->vc_suspend_state == VC_SUSPEND_SUSPENDED) {
++ /* Already suspended - just block resume and exit */
++ vchiq_log_info(vchiq_susp_log_level, "%s already suspended",
++ __func__);
++ status = VCHIQ_SUCCESS;
++ goto unlock;
++ } else if (arm_state->vc_suspend_state <= VC_SUSPEND_IDLE) {
++ /* initiate suspend immediately in the case that we're waiting
++ * for the timeout */
++ stop_suspend_timer(arm_state);
++ if (!vchiq_videocore_wanted(state)) {
++ vchiq_log_info(vchiq_susp_log_level, "%s videocore "
++ "idle, initiating suspend", __func__);
++ status = vchiq_arm_vcsuspend(state);
++ } else if (arm_state->autosuspend_override <
++ FORCE_SUSPEND_FAIL_MAX) {
++ vchiq_log_info(vchiq_susp_log_level, "%s letting "
++ "videocore go idle", __func__);
++ status = VCHIQ_SUCCESS;
++ } else {
++ vchiq_log_warning(vchiq_susp_log_level, "%s failed too "
++ "many times - attempting suspend", __func__);
++ status = vchiq_arm_vcsuspend(state);
++ }
++ } else {
++ vchiq_log_info(vchiq_susp_log_level, "%s videocore suspend "
++ "in progress - wait for completion", __func__);
++ status = VCHIQ_SUCCESS;
++ }
++
++ /* Wait for suspend to happen due to system idle (not forced..) */
++ if (status != VCHIQ_SUCCESS)
++ goto unblock_resume;
++
++ do {
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++ rc = wait_for_completion_interruptible_timeout(
++ &arm_state->vc_suspend_complete,
++ msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS));
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (rc < 0) {
++ vchiq_log_warning(vchiq_susp_log_level, "%s "
++ "interrupted waiting for suspend", __func__);
++ status = VCHIQ_ERROR;
++ goto unblock_resume;
++ } else if (rc == 0) {
++ if (arm_state->vc_suspend_state > VC_SUSPEND_IDLE) {
++ /* Repeat timeout once if in progress */
++ if (repeat < 0) {
++ repeat = 1;
++ continue;
++ }
++ }
++ arm_state->autosuspend_override++;
++ output_timeout_error(state);
++
++ status = VCHIQ_RETRY;
++ goto unblock_resume;
++ }
++ } while (0 < (repeat--));
++
++ /* Check and report state in case we need to abort ARM suspend */
++ if (arm_state->vc_suspend_state != VC_SUSPEND_SUSPENDED) {
++ status = VCHIQ_RETRY;
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s videocore suspend failed (state %s)", __func__,
++ suspend_state_names[arm_state->vc_suspend_state +
++ VC_SUSPEND_NUM_OFFSET]);
++ /* Reset the state only if it's still in an error state.
++ * Something could have already initiated another suspend. */
++ if (arm_state->vc_suspend_state < VC_SUSPEND_IDLE)
++ set_suspend_state(arm_state, VC_SUSPEND_IDLE);
++
++ goto unblock_resume;
++ }
++
++ /* successfully suspended - unlock and exit */
++ goto unlock;
++
++unblock_resume:
++ /* all error states need to unblock resume before exit */
++ unblock_resume(arm_state);
++
++unlock:
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, status);
++ return status;
++}
++
++void
++vchiq_check_suspend(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (arm_state->vc_suspend_state != VC_SUSPEND_SUSPENDED &&
++ arm_state->first_connect &&
++ !vchiq_videocore_wanted(state)) {
++ vchiq_arm_vcsuspend(state);
++ }
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
++ return;
++}
++
++
++int
++vchiq_arm_allow_resume(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ int resume = 0;
++ int ret = -1;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ unblock_resume(arm_state);
++ resume = vchiq_check_resume(state);
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++ if (resume) {
++ if (wait_for_completion_interruptible(
++ &arm_state->vc_resume_complete) < 0) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s interrupted", __func__);
++ /* failed, cannot accurately derive suspend
++ * state, so exit early. */
++ goto out;
++ }
++ }
++
++ read_lock_bh(&arm_state->susp_res_lock);
++ if (arm_state->vc_suspend_state == VC_SUSPEND_SUSPENDED) {
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s: Videocore remains suspended", __func__);
++ } else {
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s: Videocore resumed", __func__);
++ ret = 0;
++ }
++ read_unlock_bh(&arm_state->susp_res_lock);
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret);
++ return ret;
++}
++
++/* This function should be called with the write lock held */
++int
++vchiq_check_resume(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ int resume = 0;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ if (need_resume(state)) {
++ set_resume_state(arm_state, VC_RESUME_REQUESTED);
++ request_poll(state, NULL, 0);
++ resume = 1;
++ }
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
++ return resume;
++}
++
++void
++vchiq_platform_check_resume(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ int res = 0;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (arm_state->wake_address == 0) {
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s: already awake", __func__);
++ goto unlock;
++ }
++ if (arm_state->vc_resume_state == VC_RESUME_IN_PROGRESS) {
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s: already resuming", __func__);
++ goto unlock;
++ }
++
++ if (arm_state->vc_resume_state == VC_RESUME_REQUESTED) {
++ set_resume_state(arm_state, VC_RESUME_IN_PROGRESS);
++ res = 1;
++ } else
++ vchiq_log_trace(vchiq_susp_log_level,
++ "%s: not resuming (resume state %s)", __func__,
++ resume_state_names[arm_state->vc_resume_state +
++ VC_RESUME_NUM_OFFSET]);
++
++unlock:
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++ if (res)
++ vchiq_platform_resume(state);
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
++ return;
++
++}
++
++
++
++VCHIQ_STATUS_T
++vchiq_use_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service,
++ enum USE_TYPE_E use_type)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ VCHIQ_STATUS_T ret = VCHIQ_SUCCESS;
++ char entity[16];
++ int *entity_uc;
++ int local_uc, local_entity_uc;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ if (use_type == USE_TYPE_VCHIQ) {
++ sprintf(entity, "VCHIQ: ");
++ entity_uc = &arm_state->peer_use_count;
++ } else if (service) {
++ sprintf(entity, "%c%c%c%c:%03d",
++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
++ service->client_id);
++ entity_uc = &service->service_use_count;
++ } else {
++ vchiq_log_error(vchiq_susp_log_level, "%s null service "
++ "ptr", __func__);
++ ret = VCHIQ_ERROR;
++ goto out;
++ }
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ while (arm_state->resume_blocked) {
++ /* If we call 'use' while force suspend is waiting for suspend,
++ * then we're about to block the thread which the force is
++ * waiting to complete, so we're bound to just time out. In this
++ * case, set the suspend state such that the wait will be
++ * canceled, so we can complete as quickly as possible. */
++ if (arm_state->resume_blocked && arm_state->vc_suspend_state ==
++ VC_SUSPEND_IDLE) {
++ set_suspend_state(arm_state, VC_SUSPEND_FORCE_CANCELED);
++ break;
++ }
++ /* If suspend is already in progress then we need to block */
++ if (!try_wait_for_completion(&arm_state->resume_blocker)) {
++ /* Indicate that there are threads waiting on the resume
++ * blocker. These need to be allowed to complete before
++ * a _second_ call to force suspend can complete,
++ * otherwise low priority threads might never actually
++ * continue */
++ arm_state->blocked_count++;
++ write_unlock_bh(&arm_state->susp_res_lock);
++ vchiq_log_info(vchiq_susp_log_level, "%s %s resume "
++ "blocked - waiting...", __func__, entity);
++ if (wait_for_completion_killable(
++ &arm_state->resume_blocker) != 0) {
++ vchiq_log_error(vchiq_susp_log_level, "%s %s "
++ "wait for resume blocker interrupted",
++ __func__, entity);
++ ret = VCHIQ_ERROR;
++ write_lock_bh(&arm_state->susp_res_lock);
++ arm_state->blocked_count--;
++ write_unlock_bh(&arm_state->susp_res_lock);
++ goto out;
++ }
++ vchiq_log_info(vchiq_susp_log_level, "%s %s resume "
++ "unblocked", __func__, entity);
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (--arm_state->blocked_count == 0)
++ complete_all(&arm_state->blocked_blocker);
++ }
++ }
++
++ stop_suspend_timer(arm_state);
++
++ local_uc = ++arm_state->videocore_use_count;
++ local_entity_uc = ++(*entity_uc);
++
++ /* If there's a pending request which hasn't yet been serviced then
++ * just clear it. If we're past VC_SUSPEND_REQUESTED state then
++ * vc_resume_complete will block until we either resume or fail to
++ * suspend */
++ if (arm_state->vc_suspend_state <= VC_SUSPEND_REQUESTED)
++ set_suspend_state(arm_state, VC_SUSPEND_IDLE);
++
++ if ((use_type != USE_TYPE_SERVICE_NO_RESUME) && need_resume(state)) {
++ set_resume_state(arm_state, VC_RESUME_REQUESTED);
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s %s count %d, state count %d",
++ __func__, entity, local_entity_uc, local_uc);
++ request_poll(state, NULL, 0);
++ } else
++ vchiq_log_trace(vchiq_susp_log_level,
++ "%s %s count %d, state count %d",
++ __func__, entity, *entity_uc, local_uc);
++
++
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++ /* Completion is in a done state when we're not suspended, so this won't
++ * block for the non-suspended case. */
++ if (!try_wait_for_completion(&arm_state->vc_resume_complete)) {
++ vchiq_log_info(vchiq_susp_log_level, "%s %s wait for resume",
++ __func__, entity);
++ if (wait_for_completion_killable(
++ &arm_state->vc_resume_complete) != 0) {
++ vchiq_log_error(vchiq_susp_log_level, "%s %s wait for "
++ "resume interrupted", __func__, entity);
++ ret = VCHIQ_ERROR;
++ goto out;
++ }
++ vchiq_log_info(vchiq_susp_log_level, "%s %s resumed", __func__,
++ entity);
++ }
++
++ if (ret == VCHIQ_SUCCESS) {
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++ long ack_cnt = atomic_xchg(&arm_state->ka_use_ack_count, 0);
++ while (ack_cnt && (status == VCHIQ_SUCCESS)) {
++ /* Send the use notify to videocore */
++ status = vchiq_send_remote_use_active(state);
++ if (status == VCHIQ_SUCCESS)
++ ack_cnt--;
++ else
++ atomic_add(ack_cnt,
++ &arm_state->ka_use_ack_count);
++ }
++ }
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret);
++ return ret;
++}
++
++VCHIQ_STATUS_T
++vchiq_release_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ VCHIQ_STATUS_T ret = VCHIQ_SUCCESS;
++ char entity[16];
++ int *entity_uc;
++ int local_uc, local_entity_uc;
++
++ if (!arm_state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ if (service) {
++ sprintf(entity, "%c%c%c%c:%03d",
++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
++ service->client_id);
++ entity_uc = &service->service_use_count;
++ } else {
++ sprintf(entity, "PEER: ");
++ entity_uc = &arm_state->peer_use_count;
++ }
++
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (!arm_state->videocore_use_count || !(*entity_uc)) {
++ /* Don't use BUG_ON - don't allow user thread to crash kernel */
++ WARN_ON(!arm_state->videocore_use_count);
++ WARN_ON(!(*entity_uc));
++ ret = VCHIQ_ERROR;
++ goto unlock;
++ }
++ local_uc = --arm_state->videocore_use_count;
++ local_entity_uc = --(*entity_uc);
++
++ if (!vchiq_videocore_wanted(state)) {
++ if (vchiq_platform_use_suspend_timer() &&
++ !arm_state->resume_blocked) {
++ /* Only use the timer if we're not trying to force
++ * suspend (=> resume_blocked) */
++ start_suspend_timer(arm_state);
++ } else {
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s %s count %d, state count %d - suspending",
++ __func__, entity, *entity_uc,
++ arm_state->videocore_use_count);
++ vchiq_arm_vcsuspend(state);
++ }
++ } else
++ vchiq_log_trace(vchiq_susp_log_level,
++ "%s %s count %d, state count %d",
++ __func__, entity, *entity_uc,
++ arm_state->videocore_use_count);
++
++unlock:
++ write_unlock_bh(&arm_state->susp_res_lock);
++
++out:
++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret);
++ return ret;
++}
++
++void
++vchiq_on_remote_use(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++ atomic_inc(&arm_state->ka_use_count);
++ complete(&arm_state->ka_evt);
++}
++
++void
++vchiq_on_remote_release(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++ atomic_inc(&arm_state->ka_release_count);
++ complete(&arm_state->ka_evt);
++}
++
++VCHIQ_STATUS_T
++vchiq_use_service_internal(VCHIQ_SERVICE_T *service)
++{
++ return vchiq_use_internal(service->state, service, USE_TYPE_SERVICE);
++}
++
++VCHIQ_STATUS_T
++vchiq_release_service_internal(VCHIQ_SERVICE_T *service)
++{
++ return vchiq_release_internal(service->state, service);
++}
++
++VCHIQ_DEBUGFS_NODE_T *
++vchiq_instance_get_debugfs_node(VCHIQ_INSTANCE_T instance)
++{
++ return &instance->debugfs_node;
++}
++
++int
++vchiq_instance_get_use_count(VCHIQ_INSTANCE_T instance)
++{
++ VCHIQ_SERVICE_T *service;
++ int use_count = 0, i;
++ i = 0;
++ while ((service = next_service_by_instance(instance->state,
++ instance, &i)) != NULL) {
++ use_count += service->service_use_count;
++ unlock_service(service);
++ }
++ return use_count;
++}
++
++int
++vchiq_instance_get_pid(VCHIQ_INSTANCE_T instance)
++{
++ return instance->pid;
++}
++
++int
++vchiq_instance_get_trace(VCHIQ_INSTANCE_T instance)
++{
++ return instance->trace;
++}
++
++void
++vchiq_instance_set_trace(VCHIQ_INSTANCE_T instance, int trace)
++{
++ VCHIQ_SERVICE_T *service;
++ int i;
++ i = 0;
++ while ((service = next_service_by_instance(instance->state,
++ instance, &i)) != NULL) {
++ service->trace = trace;
++ unlock_service(service);
++ }
++ instance->trace = (trace != 0);
++}
++
++static void suspend_timer_callback(unsigned long context)
++{
++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *)context;
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ if (!arm_state)
++ goto out;
++ vchiq_log_info(vchiq_susp_log_level,
++ "%s - suspend timer expired - check suspend", __func__);
++ vchiq_check_suspend(state);
++out:
++ return;
++}
++
++VCHIQ_STATUS_T
++vchiq_use_service_no_resume(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_STATUS_T ret = VCHIQ_ERROR;
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ if (service) {
++ ret = vchiq_use_internal(service->state, service,
++ USE_TYPE_SERVICE_NO_RESUME);
++ unlock_service(service);
++ }
++ return ret;
++}
++
++VCHIQ_STATUS_T
++vchiq_use_service(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_STATUS_T ret = VCHIQ_ERROR;
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ if (service) {
++ ret = vchiq_use_internal(service->state, service,
++ USE_TYPE_SERVICE);
++ unlock_service(service);
++ }
++ return ret;
++}
++
++VCHIQ_STATUS_T
++vchiq_release_service(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_STATUS_T ret = VCHIQ_ERROR;
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ if (service) {
++ ret = vchiq_release_internal(service->state, service);
++ unlock_service(service);
++ }
++ return ret;
++}
++
++void
++vchiq_dump_service_use_state(VCHIQ_STATE_T *state)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ int i, j = 0;
++ /* Only dump 64 services */
++ static const int local_max_services = 64;
++ /* If there's more than 64 services, only dump ones with
++ * non-zero counts */
++ int only_nonzero = 0;
++ static const char *nz = "<-- preventing suspend";
++
++ enum vc_suspend_status vc_suspend_state;
++ enum vc_resume_status vc_resume_state;
++ int peer_count;
++ int vc_use_count;
++ int active_services;
++ struct service_data_struct {
++ int fourcc;
++ int clientid;
++ int use_count;
++ } service_data[local_max_services];
++
++ if (!arm_state)
++ return;
++
++ read_lock_bh(&arm_state->susp_res_lock);
++ vc_suspend_state = arm_state->vc_suspend_state;
++ vc_resume_state = arm_state->vc_resume_state;
++ peer_count = arm_state->peer_use_count;
++ vc_use_count = arm_state->videocore_use_count;
++ active_services = state->unused_service;
++ if (active_services > local_max_services)
++ only_nonzero = 1;
++
++ for (i = 0; (i < active_services) && (j < local_max_services); i++) {
++ VCHIQ_SERVICE_T *service_ptr = state->services[i];
++ if (!service_ptr)
++ continue;
++
++ if (only_nonzero && !service_ptr->service_use_count)
++ continue;
++
++ if (service_ptr->srvstate != VCHIQ_SRVSTATE_FREE) {
++ service_data[j].fourcc = service_ptr->base.fourcc;
++ service_data[j].clientid = service_ptr->client_id;
++ service_data[j++].use_count = service_ptr->
++ service_use_count;
++ }
++ }
++
++ read_unlock_bh(&arm_state->susp_res_lock);
++
++ vchiq_log_warning(vchiq_susp_log_level,
++ "-- Videcore suspend state: %s --",
++ suspend_state_names[vc_suspend_state + VC_SUSPEND_NUM_OFFSET]);
++ vchiq_log_warning(vchiq_susp_log_level,
++ "-- Videcore resume state: %s --",
++ resume_state_names[vc_resume_state + VC_RESUME_NUM_OFFSET]);
++
++ if (only_nonzero)
++ vchiq_log_warning(vchiq_susp_log_level, "Too many active "
++ "services (%d). Only dumping up to first %d services "
++ "with non-zero use-count", active_services,
++ local_max_services);
++
++ for (i = 0; i < j; i++) {
++ vchiq_log_warning(vchiq_susp_log_level,
++ "----- %c%c%c%c:%d service count %d %s",
++ VCHIQ_FOURCC_AS_4CHARS(service_data[i].fourcc),
++ service_data[i].clientid,
++ service_data[i].use_count,
++ service_data[i].use_count ? nz : "");
++ }
++ vchiq_log_warning(vchiq_susp_log_level,
++ "----- VCHIQ use count count %d", peer_count);
++ vchiq_log_warning(vchiq_susp_log_level,
++ "--- Overall vchiq instance use count %d", vc_use_count);
++
++ vchiq_dump_platform_use_state(state);
++}
++
++VCHIQ_STATUS_T
++vchiq_check_service(VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_ARM_STATE_T *arm_state;
++ VCHIQ_STATUS_T ret = VCHIQ_ERROR;
++
++ if (!service || !service->state)
++ goto out;
++
++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
++
++ arm_state = vchiq_platform_get_arm_state(service->state);
++
++ read_lock_bh(&arm_state->susp_res_lock);
++ if (service->service_use_count)
++ ret = VCHIQ_SUCCESS;
++ read_unlock_bh(&arm_state->susp_res_lock);
++
++ if (ret == VCHIQ_ERROR) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "%s ERROR - %c%c%c%c:%d service count %d, "
++ "state count %d, videocore suspend state %s", __func__,
++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
++ service->client_id, service->service_use_count,
++ arm_state->videocore_use_count,
++ suspend_state_names[arm_state->vc_suspend_state +
++ VC_SUSPEND_NUM_OFFSET]);
++ vchiq_dump_service_use_state(service->state);
++ }
++out:
++ return ret;
++}
++
++/* stub functions */
++void vchiq_on_remote_use_active(VCHIQ_STATE_T *state)
++{
++ (void)state;
++}
++
++void vchiq_platform_conn_state_changed(VCHIQ_STATE_T *state,
++ VCHIQ_CONNSTATE_T oldstate, VCHIQ_CONNSTATE_T newstate)
++{
++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state);
++ vchiq_log_info(vchiq_susp_log_level, "%d: %s->%s", state->id,
++ get_conn_state_name(oldstate), get_conn_state_name(newstate));
++ if (state->conn_state == VCHIQ_CONNSTATE_CONNECTED) {
++ write_lock_bh(&arm_state->susp_res_lock);
++ if (!arm_state->first_connect) {
++ char threadname[10];
++ arm_state->first_connect = 1;
++ write_unlock_bh(&arm_state->susp_res_lock);
++ snprintf(threadname, sizeof(threadname), "VCHIQka-%d",
++ state->id);
++ arm_state->ka_thread = kthread_create(
++ &vchiq_keepalive_thread_func,
++ (void *)state,
++ threadname);
++ if (arm_state->ka_thread == NULL) {
++ vchiq_log_error(vchiq_susp_log_level,
++ "vchiq: FATAL: couldn't create thread %s",
++ threadname);
++ } else {
++ wake_up_process(arm_state->ka_thread);
++ }
++ } else
++ write_unlock_bh(&arm_state->susp_res_lock);
++ }
++}
++
++
++/****************************************************************************
++*
++* vchiq_init - called when the module is loaded.
++*
++***************************************************************************/
++
++static int __init
++vchiq_init(void)
++{
++ int err;
++ void *ptr_err;
++
++ /* create debugfs entries */
++ err = vchiq_debugfs_init();
++ if (err != 0)
++ goto failed_debugfs_init;
++
++ err = alloc_chrdev_region(&vchiq_devid, VCHIQ_MINOR, 1, DEVICE_NAME);
++ if (err != 0) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "Unable to allocate device number");
++ goto failed_alloc_chrdev;
++ }
++ cdev_init(&vchiq_cdev, &vchiq_fops);
++ vchiq_cdev.owner = THIS_MODULE;
++ err = cdev_add(&vchiq_cdev, vchiq_devid, 1);
++ if (err != 0) {
++ vchiq_log_error(vchiq_arm_log_level,
++ "Unable to register device");
++ goto failed_cdev_add;
++ }
++
++ /* create sysfs entries */
++ vchiq_class = class_create(THIS_MODULE, DEVICE_NAME);
++ ptr_err = vchiq_class;
++ if (IS_ERR(ptr_err))
++ goto failed_class_create;
++
++ vchiq_dev = device_create(vchiq_class, NULL,
++ vchiq_devid, NULL, "vchiq");
++ ptr_err = vchiq_dev;
++ if (IS_ERR(ptr_err))
++ goto failed_device_create;
++
++ err = vchiq_platform_init(&g_state);
++ if (err != 0)
++ goto failed_platform_init;
++
++ vchiq_log_info(vchiq_arm_log_level,
++ "vchiq: initialised - version %d (min %d), device %d.%d",
++ VCHIQ_VERSION, VCHIQ_VERSION_MIN,
++ MAJOR(vchiq_devid), MINOR(vchiq_devid));
++
++ return 0;
++
++failed_platform_init:
++ device_destroy(vchiq_class, vchiq_devid);
++failed_device_create:
++ class_destroy(vchiq_class);
++failed_class_create:
++ cdev_del(&vchiq_cdev);
++ err = PTR_ERR(ptr_err);
++failed_cdev_add:
++ unregister_chrdev_region(vchiq_devid, 1);
++failed_alloc_chrdev:
++ vchiq_debugfs_deinit();
++failed_debugfs_init:
++ vchiq_log_warning(vchiq_arm_log_level, "could not load vchiq");
++ return err;
++}
++
++/****************************************************************************
++*
++* vchiq_exit - called when the module is unloaded.
++*
++***************************************************************************/
++
++static void __exit
++vchiq_exit(void)
++{
++ vchiq_platform_exit(&g_state);
++ device_destroy(vchiq_class, vchiq_devid);
++ class_destroy(vchiq_class);
++ cdev_del(&vchiq_cdev);
++ unregister_chrdev_region(vchiq_devid, 1);
++}
++
++module_init(vchiq_init);
++module_exit(vchiq_exit);
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Broadcom Corporation");
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.h
+new file mode 100644
+index 0000000..d1e2741
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.h
+@@ -0,0 +1,223 @@
++/**
++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved.
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_ARM_H
++#define VCHIQ_ARM_H
++
++#include <linux/mutex.h>
++#include <linux/semaphore.h>
++#include <linux/atomic.h>
++#include "vchiq_core.h"
++#include "vchiq_debugfs.h"
++
++
++enum vc_suspend_status {
++ VC_SUSPEND_FORCE_CANCELED = -3, /* Force suspend canceled, too busy */
++ VC_SUSPEND_REJECTED = -2, /* Videocore rejected suspend request */
++ VC_SUSPEND_FAILED = -1, /* Videocore suspend failed */
++ VC_SUSPEND_IDLE = 0, /* VC active, no suspend actions */
++ VC_SUSPEND_REQUESTED, /* User has requested suspend */
++ VC_SUSPEND_IN_PROGRESS, /* Slot handler has recvd suspend request */
++ VC_SUSPEND_SUSPENDED /* Videocore suspend succeeded */
++};
++
++enum vc_resume_status {
++ VC_RESUME_FAILED = -1, /* Videocore resume failed */
++ VC_RESUME_IDLE = 0, /* VC suspended, no resume actions */
++ VC_RESUME_REQUESTED, /* User has requested resume */
++ VC_RESUME_IN_PROGRESS, /* Slot handler has received resume request */
++ VC_RESUME_RESUMED /* Videocore resumed successfully (active) */
++};
++
++
++enum USE_TYPE_E {
++ USE_TYPE_SERVICE,
++ USE_TYPE_SERVICE_NO_RESUME,
++ USE_TYPE_VCHIQ
++};
++
++
++
++typedef struct vchiq_arm_state_struct {
++ /* Keepalive-related data */
++ struct task_struct *ka_thread;
++ struct completion ka_evt;
++ atomic_t ka_use_count;
++ atomic_t ka_use_ack_count;
++ atomic_t ka_release_count;
++
++ struct completion vc_suspend_complete;
++ struct completion vc_resume_complete;
++
++ rwlock_t susp_res_lock;
++ enum vc_suspend_status vc_suspend_state;
++ enum vc_resume_status vc_resume_state;
++
++ unsigned int wake_address;
++
++ struct timer_list suspend_timer;
++ int suspend_timer_timeout;
++ int suspend_timer_running;
++
++ /* Global use count for videocore.
++ ** This is equal to the sum of the use counts for all services. When
++ ** this hits zero the videocore suspend procedure will be initiated.
++ */
++ int videocore_use_count;
++
++ /* Use count to track requests from videocore peer.
++ ** This use count is not associated with a service, so needs to be
++ ** tracked separately with the state.
++ */
++ int peer_use_count;
++
++ /* Flag to indicate whether resume is blocked. This happens when the
++ ** ARM is suspending
++ */
++ struct completion resume_blocker;
++ int resume_blocked;
++ struct completion blocked_blocker;
++ int blocked_count;
++
++ int autosuspend_override;
++
++ /* Flag to indicate that the first vchiq connect has made it through.
++ ** This means that both sides should be fully ready, and we should
++ ** be able to suspend after this point.
++ */
++ int first_connect;
++
++ unsigned long long suspend_start_time;
++ unsigned long long sleep_start_time;
++ unsigned long long resume_start_time;
++ unsigned long long last_wake_time;
++
++} VCHIQ_ARM_STATE_T;
++
++extern int vchiq_arm_log_level;
++extern int vchiq_susp_log_level;
++
++extern int __init
++vchiq_platform_init(VCHIQ_STATE_T *state);
++
++extern void __exit
++vchiq_platform_exit(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATE_T *
++vchiq_get_state(void);
++
++extern VCHIQ_STATUS_T
++vchiq_arm_vcsuspend(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_arm_force_suspend(VCHIQ_STATE_T *state);
++
++extern int
++vchiq_arm_allow_resume(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_arm_vcresume(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_arm_init_state(VCHIQ_STATE_T *state, VCHIQ_ARM_STATE_T *arm_state);
++
++extern int
++vchiq_check_resume(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_check_suspend(VCHIQ_STATE_T *state);
++ VCHIQ_STATUS_T
++vchiq_use_service(VCHIQ_SERVICE_HANDLE_T handle);
++
++extern VCHIQ_STATUS_T
++vchiq_release_service(VCHIQ_SERVICE_HANDLE_T handle);
++
++extern VCHIQ_STATUS_T
++vchiq_check_service(VCHIQ_SERVICE_T *service);
++
++extern VCHIQ_STATUS_T
++vchiq_platform_suspend(VCHIQ_STATE_T *state);
++
++extern int
++vchiq_platform_videocore_wanted(VCHIQ_STATE_T *state);
++
++extern int
++vchiq_platform_use_suspend_timer(void);
++
++extern void
++vchiq_dump_platform_use_state(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_dump_service_use_state(VCHIQ_STATE_T *state);
++
++extern VCHIQ_ARM_STATE_T*
++vchiq_platform_get_arm_state(VCHIQ_STATE_T *state);
++
++extern int
++vchiq_videocore_wanted(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_use_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service,
++ enum USE_TYPE_E use_type);
++extern VCHIQ_STATUS_T
++vchiq_release_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service);
++
++extern VCHIQ_DEBUGFS_NODE_T *
++vchiq_instance_get_debugfs_node(VCHIQ_INSTANCE_T instance);
++
++extern int
++vchiq_instance_get_use_count(VCHIQ_INSTANCE_T instance);
++
++extern int
++vchiq_instance_get_pid(VCHIQ_INSTANCE_T instance);
++
++extern int
++vchiq_instance_get_trace(VCHIQ_INSTANCE_T instance);
++
++extern void
++vchiq_instance_set_trace(VCHIQ_INSTANCE_T instance, int trace);
++
++extern void
++set_suspend_state(VCHIQ_ARM_STATE_T *arm_state,
++ enum vc_suspend_status new_state);
++
++extern void
++set_resume_state(VCHIQ_ARM_STATE_T *arm_state,
++ enum vc_resume_status new_state);
++
++extern void
++start_suspend_timer(VCHIQ_ARM_STATE_T *arm_state);
++
++
++#endif /* VCHIQ_ARM_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_build_info.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_build_info.h
+new file mode 100644
+index 0000000..df64581
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_build_info.h
+@@ -0,0 +1,37 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++const char *vchiq_get_build_hostname(void);
++const char *vchiq_get_build_version(void);
++const char *vchiq_get_build_time(void);
++const char *vchiq_get_build_date(void);
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_cfg.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_cfg.h
+new file mode 100644
+index 0000000..c382740
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_cfg.h
+@@ -0,0 +1,66 @@
++/**
++ * Copyright (c) 2010-2014 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_CFG_H
++#define VCHIQ_CFG_H
++
++#define VCHIQ_MAGIC VCHIQ_MAKE_FOURCC('V', 'C', 'H', 'I')
++/* The version of VCHIQ - change with any non-trivial change */
++#define VCHIQ_VERSION 7
++/* The minimum compatible version - update to match VCHIQ_VERSION with any
++** incompatible change */
++#define VCHIQ_VERSION_MIN 3
++
++/* The version that introduced the VCHIQ_IOC_LIB_VERSION ioctl */
++#define VCHIQ_VERSION_LIB_VERSION 7
++
++/* The version that introduced the VCHIQ_IOC_CLOSE_DELIVERED ioctl */
++#define VCHIQ_VERSION_CLOSE_DELIVERED 7
++
++#define VCHIQ_MAX_STATES 1
++#define VCHIQ_MAX_SERVICES 4096
++#define VCHIQ_MAX_SLOTS 128
++#define VCHIQ_MAX_SLOTS_PER_SIDE 64
++
++#define VCHIQ_NUM_CURRENT_BULKS 32
++#define VCHIQ_NUM_SERVICE_BULKS 4
++
++#ifndef VCHIQ_ENABLE_DEBUG
++#define VCHIQ_ENABLE_DEBUG 1
++#endif
++
++#ifndef VCHIQ_ENABLE_STATS
++#define VCHIQ_ENABLE_STATS 1
++#endif
++
++#endif /* VCHIQ_CFG_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c
+new file mode 100644
+index 0000000..65f4b52
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c
+@@ -0,0 +1,119 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#include "vchiq_connected.h"
++#include "vchiq_core.h"
++#include <linux/module.h>
++#include <linux/mutex.h>
++
++#define MAX_CALLBACKS 10
++
++static int g_connected;
++static int g_num_deferred_callbacks;
++static VCHIQ_CONNECTED_CALLBACK_T g_deferred_callback[MAX_CALLBACKS];
++static int g_once_init;
++static struct mutex g_connected_mutex;
++
++/****************************************************************************
++*
++* Function to initialize our lock.
++*
++***************************************************************************/
++
++static void connected_init(void)
++{
++ if (!g_once_init) {
++ mutex_init(&g_connected_mutex);
++ g_once_init = 1;
++ }
++}
++
++/****************************************************************************
++*
++* This function is used to defer initialization until the vchiq stack is
++* initialized. If the stack is already initialized, then the callback will
++* be made immediately, otherwise it will be deferred until
++* vchiq_call_connected_callbacks is called.
++*
++***************************************************************************/
++
++void vchiq_add_connected_callback(VCHIQ_CONNECTED_CALLBACK_T callback)
++{
++ connected_init();
++
++ if (mutex_lock_interruptible(&g_connected_mutex) != 0)
++ return;
++
++ if (g_connected)
++ /* We're already connected. Call the callback immediately. */
++
++ callback();
++ else {
++ if (g_num_deferred_callbacks >= MAX_CALLBACKS)
++ vchiq_log_error(vchiq_core_log_level,
++ "There already %d callback registered - "
++ "please increase MAX_CALLBACKS",
++ g_num_deferred_callbacks);
++ else {
++ g_deferred_callback[g_num_deferred_callbacks] =
++ callback;
++ g_num_deferred_callbacks++;
++ }
++ }
++ mutex_unlock(&g_connected_mutex);
++}
++
++/****************************************************************************
++*
++* This function is called by the vchiq stack once it has been connected to
++* the videocore and clients can start to use the stack.
++*
++***************************************************************************/
++
++void vchiq_call_connected_callbacks(void)
++{
++ int i;
++
++ connected_init();
++
++ if (mutex_lock_interruptible(&g_connected_mutex) != 0)
++ return;
++
++ for (i = 0; i < g_num_deferred_callbacks; i++)
++ g_deferred_callback[i]();
++
++ g_num_deferred_callbacks = 0;
++ g_connected = 1;
++ mutex_unlock(&g_connected_mutex);
++}
++EXPORT_SYMBOL(vchiq_add_connected_callback);
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.h
+new file mode 100644
+index 0000000..863b3e3
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.h
+@@ -0,0 +1,50 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_CONNECTED_H
++#define VCHIQ_CONNECTED_H
++
++/* ---- Include Files ----------------------------------------------------- */
++
++/* ---- Constants and Types ---------------------------------------------- */
++
++typedef void (*VCHIQ_CONNECTED_CALLBACK_T)(void);
++
++/* ---- Variable Externs ------------------------------------------------- */
++
++/* ---- Function Prototypes ---------------------------------------------- */
++
++void vchiq_add_connected_callback(VCHIQ_CONNECTED_CALLBACK_T callback);
++void vchiq_call_connected_callbacks(void);
++
++#endif /* VCHIQ_CONNECTED_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
+new file mode 100644
+index 0000000..f962027
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
+@@ -0,0 +1,3861 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#include "vchiq_core.h"
++
++#define VCHIQ_SLOT_HANDLER_STACK 8192
++
++#define HANDLE_STATE_SHIFT 12
++
++#define SLOT_INFO_FROM_INDEX(state, index) (state->slot_info + (index))
++#define SLOT_DATA_FROM_INDEX(state, index) (state->slot_data + (index))
++#define SLOT_INDEX_FROM_DATA(state, data) \
++ (((unsigned int)((char *)data - (char *)state->slot_data)) / \
++ VCHIQ_SLOT_SIZE)
++#define SLOT_INDEX_FROM_INFO(state, info) \
++ ((unsigned int)(info - state->slot_info))
++#define SLOT_QUEUE_INDEX_FROM_POS(pos) \
++ ((int)((unsigned int)(pos) / VCHIQ_SLOT_SIZE))
++
++#define BULK_INDEX(x) (x & (VCHIQ_NUM_SERVICE_BULKS - 1))
++
++#define SRVTRACE_LEVEL(srv) \
++ (((srv) && (srv)->trace) ? VCHIQ_LOG_TRACE : vchiq_core_msg_log_level)
++#define SRVTRACE_ENABLED(srv, lev) \
++ (((srv) && (srv)->trace) || (vchiq_core_msg_log_level >= (lev)))
++
++struct vchiq_open_payload {
++ int fourcc;
++ int client_id;
++ short version;
++ short version_min;
++};
++
++struct vchiq_openack_payload {
++ short version;
++};
++
++/* we require this for consistency between endpoints */
++vchiq_static_assert(sizeof(VCHIQ_HEADER_T) == 8);
++vchiq_static_assert(IS_POW2(sizeof(VCHIQ_HEADER_T)));
++vchiq_static_assert(IS_POW2(VCHIQ_NUM_CURRENT_BULKS));
++vchiq_static_assert(IS_POW2(VCHIQ_NUM_SERVICE_BULKS));
++vchiq_static_assert(IS_POW2(VCHIQ_MAX_SERVICES));
++vchiq_static_assert(VCHIQ_VERSION >= VCHIQ_VERSION_MIN);
++
++/* Run time control of log level, based on KERN_XXX level. */
++int vchiq_core_log_level = VCHIQ_LOG_DEFAULT;
++int vchiq_core_msg_log_level = VCHIQ_LOG_DEFAULT;
++int vchiq_sync_log_level = VCHIQ_LOG_DEFAULT;
++
++static atomic_t pause_bulks_count = ATOMIC_INIT(0);
++
++static DEFINE_SPINLOCK(service_spinlock);
++DEFINE_SPINLOCK(bulk_waiter_spinlock);
++DEFINE_SPINLOCK(quota_spinlock);
++
++VCHIQ_STATE_T *vchiq_states[VCHIQ_MAX_STATES];
++static unsigned int handle_seq;
++
++static const char *const srvstate_names[] = {
++ "FREE",
++ "HIDDEN",
++ "LISTENING",
++ "OPENING",
++ "OPEN",
++ "OPENSYNC",
++ "CLOSESENT",
++ "CLOSERECVD",
++ "CLOSEWAIT",
++ "CLOSED"
++};
++
++static const char *const reason_names[] = {
++ "SERVICE_OPENED",
++ "SERVICE_CLOSED",
++ "MESSAGE_AVAILABLE",
++ "BULK_TRANSMIT_DONE",
++ "BULK_RECEIVE_DONE",
++ "BULK_TRANSMIT_ABORTED",
++ "BULK_RECEIVE_ABORTED"
++};
++
++static const char *const conn_state_names[] = {
++ "DISCONNECTED",
++ "CONNECTING",
++ "CONNECTED",
++ "PAUSING",
++ "PAUSE_SENT",
++ "PAUSED",
++ "RESUMING",
++ "PAUSE_TIMEOUT",
++ "RESUME_TIMEOUT"
++};
++
++
++static void
++release_message_sync(VCHIQ_STATE_T *state, VCHIQ_HEADER_T *header);
++
++static const char *msg_type_str(unsigned int msg_type)
++{
++ switch (msg_type) {
++ case VCHIQ_MSG_PADDING: return "PADDING";
++ case VCHIQ_MSG_CONNECT: return "CONNECT";
++ case VCHIQ_MSG_OPEN: return "OPEN";
++ case VCHIQ_MSG_OPENACK: return "OPENACK";
++ case VCHIQ_MSG_CLOSE: return "CLOSE";
++ case VCHIQ_MSG_DATA: return "DATA";
++ case VCHIQ_MSG_BULK_RX: return "BULK_RX";
++ case VCHIQ_MSG_BULK_TX: return "BULK_TX";
++ case VCHIQ_MSG_BULK_RX_DONE: return "BULK_RX_DONE";
++ case VCHIQ_MSG_BULK_TX_DONE: return "BULK_TX_DONE";
++ case VCHIQ_MSG_PAUSE: return "PAUSE";
++ case VCHIQ_MSG_RESUME: return "RESUME";
++ case VCHIQ_MSG_REMOTE_USE: return "REMOTE_USE";
++ case VCHIQ_MSG_REMOTE_RELEASE: return "REMOTE_RELEASE";
++ case VCHIQ_MSG_REMOTE_USE_ACTIVE: return "REMOTE_USE_ACTIVE";
++ }
++ return "???";
++}
++
++static inline void
++vchiq_set_service_state(VCHIQ_SERVICE_T *service, int newstate)
++{
++ vchiq_log_info(vchiq_core_log_level, "%d: srv:%d %s->%s",
++ service->state->id, service->localport,
++ srvstate_names[service->srvstate],
++ srvstate_names[newstate]);
++ service->srvstate = newstate;
++}
++
++VCHIQ_SERVICE_T *
++find_service_by_handle(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_SERVICE_T *service;
++
++ spin_lock(&service_spinlock);
++ service = handle_to_service(handle);
++ if (service && (service->srvstate != VCHIQ_SRVSTATE_FREE) &&
++ (service->handle == handle)) {
++ BUG_ON(service->ref_count == 0);
++ service->ref_count++;
++ } else
++ service = NULL;
++ spin_unlock(&service_spinlock);
++
++ if (!service)
++ vchiq_log_info(vchiq_core_log_level,
++ "Invalid service handle 0x%x", handle);
++
++ return service;
++}
++
++VCHIQ_SERVICE_T *
++find_service_by_port(VCHIQ_STATE_T *state, int localport)
++{
++ VCHIQ_SERVICE_T *service = NULL;
++ if ((unsigned int)localport <= VCHIQ_PORT_MAX) {
++ spin_lock(&service_spinlock);
++ service = state->services[localport];
++ if (service && (service->srvstate != VCHIQ_SRVSTATE_FREE)) {
++ BUG_ON(service->ref_count == 0);
++ service->ref_count++;
++ } else
++ service = NULL;
++ spin_unlock(&service_spinlock);
++ }
++
++ if (!service)
++ vchiq_log_info(vchiq_core_log_level,
++ "Invalid port %d", localport);
++
++ return service;
++}
++
++VCHIQ_SERVICE_T *
++find_service_for_instance(VCHIQ_INSTANCE_T instance,
++ VCHIQ_SERVICE_HANDLE_T handle) {
++ VCHIQ_SERVICE_T *service;
++
++ spin_lock(&service_spinlock);
++ service = handle_to_service(handle);
++ if (service && (service->srvstate != VCHIQ_SRVSTATE_FREE) &&
++ (service->handle == handle) &&
++ (service->instance == instance)) {
++ BUG_ON(service->ref_count == 0);
++ service->ref_count++;
++ } else
++ service = NULL;
++ spin_unlock(&service_spinlock);
++
++ if (!service)
++ vchiq_log_info(vchiq_core_log_level,
++ "Invalid service handle 0x%x", handle);
++
++ return service;
++}
++
++VCHIQ_SERVICE_T *
++find_closed_service_for_instance(VCHIQ_INSTANCE_T instance,
++ VCHIQ_SERVICE_HANDLE_T handle) {
++ VCHIQ_SERVICE_T *service;
++
++ spin_lock(&service_spinlock);
++ service = handle_to_service(handle);
++ if (service &&
++ ((service->srvstate == VCHIQ_SRVSTATE_FREE) ||
++ (service->srvstate == VCHIQ_SRVSTATE_CLOSED)) &&
++ (service->handle == handle) &&
++ (service->instance == instance)) {
++ BUG_ON(service->ref_count == 0);
++ service->ref_count++;
++ } else
++ service = NULL;
++ spin_unlock(&service_spinlock);
++
++ if (!service)
++ vchiq_log_info(vchiq_core_log_level,
++ "Invalid service handle 0x%x", handle);
++
++ return service;
++}
++
++VCHIQ_SERVICE_T *
++next_service_by_instance(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance,
++ int *pidx)
++{
++ VCHIQ_SERVICE_T *service = NULL;
++ int idx = *pidx;
++
++ spin_lock(&service_spinlock);
++ while (idx < state->unused_service) {
++ VCHIQ_SERVICE_T *srv = state->services[idx++];
++ if (srv && (srv->srvstate != VCHIQ_SRVSTATE_FREE) &&
++ (srv->instance == instance)) {
++ service = srv;
++ BUG_ON(service->ref_count == 0);
++ service->ref_count++;
++ break;
++ }
++ }
++ spin_unlock(&service_spinlock);
++
++ *pidx = idx;
++
++ return service;
++}
++
++void
++lock_service(VCHIQ_SERVICE_T *service)
++{
++ spin_lock(&service_spinlock);
++ BUG_ON(!service || (service->ref_count == 0));
++ if (service)
++ service->ref_count++;
++ spin_unlock(&service_spinlock);
++}
++
++void
++unlock_service(VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_STATE_T *state = service->state;
++ spin_lock(&service_spinlock);
++ BUG_ON(!service || (service->ref_count == 0));
++ if (service && service->ref_count) {
++ service->ref_count--;
++ if (!service->ref_count) {
++ BUG_ON(service->srvstate != VCHIQ_SRVSTATE_FREE);
++ state->services[service->localport] = NULL;
++ } else
++ service = NULL;
++ }
++ spin_unlock(&service_spinlock);
++
++ if (service && service->userdata_term)
++ service->userdata_term(service->base.userdata);
++
++ kfree(service);
++}
++
++int
++vchiq_get_client_id(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ int id;
++
++ id = service ? service->client_id : 0;
++ if (service)
++ unlock_service(service);
++
++ return id;
++}
++
++void *
++vchiq_get_service_userdata(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_SERVICE_T *service = handle_to_service(handle);
++
++ return service ? service->base.userdata : NULL;
++}
++
++int
++vchiq_get_service_fourcc(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_SERVICE_T *service = handle_to_service(handle);
++
++ return service ? service->base.fourcc : 0;
++}
++
++static void
++mark_service_closing_internal(VCHIQ_SERVICE_T *service, int sh_thread)
++{
++ VCHIQ_STATE_T *state = service->state;
++ VCHIQ_SERVICE_QUOTA_T *service_quota;
++
++ service->closing = 1;
++
++ /* Synchronise with other threads. */
++ mutex_lock(&state->recycle_mutex);
++ mutex_unlock(&state->recycle_mutex);
++ if (!sh_thread || (state->conn_state != VCHIQ_CONNSTATE_PAUSE_SENT)) {
++ /* If we're pausing then the slot_mutex is held until resume
++ * by the slot handler. Therefore don't try to acquire this
++ * mutex if we're the slot handler and in the pause sent state.
++ * We don't need to in this case anyway. */
++ mutex_lock(&state->slot_mutex);
++ mutex_unlock(&state->slot_mutex);
++ }
++
++ /* Unblock any sending thread. */
++ service_quota = &state->service_quotas[service->localport];
++ up(&service_quota->quota_event);
++}
++
++static void
++mark_service_closing(VCHIQ_SERVICE_T *service)
++{
++ mark_service_closing_internal(service, 0);
++}
++
++static inline VCHIQ_STATUS_T
++make_service_callback(VCHIQ_SERVICE_T *service, VCHIQ_REASON_T reason,
++ VCHIQ_HEADER_T *header, void *bulk_userdata)
++{
++ VCHIQ_STATUS_T status;
++ vchiq_log_trace(vchiq_core_log_level, "%d: callback:%d (%s, %x, %x)",
++ service->state->id, service->localport, reason_names[reason],
++ (unsigned int)header, (unsigned int)bulk_userdata);
++ status = service->base.callback(reason, header, service->handle,
++ bulk_userdata);
++ if (status == VCHIQ_ERROR) {
++ vchiq_log_warning(vchiq_core_log_level,
++ "%d: ignoring ERROR from callback to service %x",
++ service->state->id, service->handle);
++ status = VCHIQ_SUCCESS;
++ }
++ return status;
++}
++
++inline void
++vchiq_set_conn_state(VCHIQ_STATE_T *state, VCHIQ_CONNSTATE_T newstate)
++{
++ VCHIQ_CONNSTATE_T oldstate = state->conn_state;
++ vchiq_log_info(vchiq_core_log_level, "%d: %s->%s", state->id,
++ conn_state_names[oldstate],
++ conn_state_names[newstate]);
++ state->conn_state = newstate;
++ vchiq_platform_conn_state_changed(state, oldstate, newstate);
++}
++
++static inline void
++remote_event_create(REMOTE_EVENT_T *event)
++{
++ event->armed = 0;
++ /* Don't clear the 'fired' flag because it may already have been set
++ ** by the other side. */
++ sema_init(event->event, 0);
++}
++
++static inline void
++remote_event_destroy(REMOTE_EVENT_T *event)
++{
++ (void)event;
++}
++
++static inline int
++remote_event_wait(REMOTE_EVENT_T *event)
++{
++ if (!event->fired) {
++ event->armed = 1;
++ dsb();
++ if (!event->fired) {
++ if (down_interruptible(event->event) != 0) {
++ event->armed = 0;
++ return 0;
++ }
++ }
++ event->armed = 0;
++ wmb();
++ }
++
++ event->fired = 0;
++ return 1;
++}
++
++static inline void
++remote_event_signal_local(REMOTE_EVENT_T *event)
++{
++ event->armed = 0;
++ up(event->event);
++}
++
++static inline void
++remote_event_poll(REMOTE_EVENT_T *event)
++{
++ if (event->fired && event->armed)
++ remote_event_signal_local(event);
++}
++
++void
++remote_event_pollall(VCHIQ_STATE_T *state)
++{
++ remote_event_poll(&state->local->sync_trigger);
++ remote_event_poll(&state->local->sync_release);
++ remote_event_poll(&state->local->trigger);
++ remote_event_poll(&state->local->recycle);
++}
++
++/* Round up message sizes so that any space at the end of a slot is always big
++** enough for a header. This relies on header size being a power of two, which
++** has been verified earlier by a static assertion. */
++
++static inline unsigned int
++calc_stride(unsigned int size)
++{
++ /* Allow room for the header */
++ size += sizeof(VCHIQ_HEADER_T);
++
++ /* Round up */
++ return (size + sizeof(VCHIQ_HEADER_T) - 1) & ~(sizeof(VCHIQ_HEADER_T)
++ - 1);
++}
++
++/* Called by the slot handler thread */
++static VCHIQ_SERVICE_T *
++get_listening_service(VCHIQ_STATE_T *state, int fourcc)
++{
++ int i;
++
++ WARN_ON(fourcc == VCHIQ_FOURCC_INVALID);
++
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *service = state->services[i];
++ if (service &&
++ (service->public_fourcc == fourcc) &&
++ ((service->srvstate == VCHIQ_SRVSTATE_LISTENING) ||
++ ((service->srvstate == VCHIQ_SRVSTATE_OPEN) &&
++ (service->remoteport == VCHIQ_PORT_FREE)))) {
++ lock_service(service);
++ return service;
++ }
++ }
++
++ return NULL;
++}
++
++/* Called by the slot handler thread */
++static VCHIQ_SERVICE_T *
++get_connected_service(VCHIQ_STATE_T *state, unsigned int port)
++{
++ int i;
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *service = state->services[i];
++ if (service && (service->srvstate == VCHIQ_SRVSTATE_OPEN)
++ && (service->remoteport == port)) {
++ lock_service(service);
++ return service;
++ }
++ }
++ return NULL;
++}
++
++inline void
++request_poll(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, int poll_type)
++{
++ uint32_t value;
++
++ if (service) {
++ do {
++ value = atomic_read(&service->poll_flags);
++ } while (atomic_cmpxchg(&service->poll_flags, value,
++ value | (1 << poll_type)) != value);
++
++ do {
++ value = atomic_read(&state->poll_services[
++ service->localport>>5]);
++ } while (atomic_cmpxchg(
++ &state->poll_services[service->localport>>5],
++ value, value | (1 << (service->localport & 0x1f)))
++ != value);
++ }
++
++ state->poll_needed = 1;
++ wmb();
++
++ /* ... and ensure the slot handler runs. */
++ remote_event_signal_local(&state->local->trigger);
++}
++
++/* Called from queue_message, by the slot handler and application threads,
++** with slot_mutex held */
++static VCHIQ_HEADER_T *
++reserve_space(VCHIQ_STATE_T *state, int space, int is_blocking)
++{
++ VCHIQ_SHARED_STATE_T *local = state->local;
++ int tx_pos = state->local_tx_pos;
++ int slot_space = VCHIQ_SLOT_SIZE - (tx_pos & VCHIQ_SLOT_MASK);
++
++ if (space > slot_space) {
++ VCHIQ_HEADER_T *header;
++ /* Fill the remaining space with padding */
++ WARN_ON(state->tx_data == NULL);
++ header = (VCHIQ_HEADER_T *)
++ (state->tx_data + (tx_pos & VCHIQ_SLOT_MASK));
++ header->msgid = VCHIQ_MSGID_PADDING;
++ header->size = slot_space - sizeof(VCHIQ_HEADER_T);
++
++ tx_pos += slot_space;
++ }
++
++ /* If necessary, get the next slot. */
++ if ((tx_pos & VCHIQ_SLOT_MASK) == 0) {
++ int slot_index;
++
++ /* If there is no free slot... */
++
++ if (down_trylock(&state->slot_available_event) != 0) {
++ /* ...wait for one. */
++
++ VCHIQ_STATS_INC(state, slot_stalls);
++
++ /* But first, flush through the last slot. */
++ state->local_tx_pos = tx_pos;
++ local->tx_pos = tx_pos;
++ remote_event_signal(&state->remote->trigger);
++
++ if (!is_blocking ||
++ (down_interruptible(
++ &state->slot_available_event) != 0))
++ return NULL; /* No space available */
++ }
++
++ BUG_ON(tx_pos ==
++ (state->slot_queue_available * VCHIQ_SLOT_SIZE));
++
++ slot_index = local->slot_queue[
++ SLOT_QUEUE_INDEX_FROM_POS(tx_pos) &
++ VCHIQ_SLOT_QUEUE_MASK];
++ state->tx_data =
++ (char *)SLOT_DATA_FROM_INDEX(state, slot_index);
++ }
++
++ state->local_tx_pos = tx_pos + space;
++
++ return (VCHIQ_HEADER_T *)(state->tx_data + (tx_pos & VCHIQ_SLOT_MASK));
++}
++
++/* Called by the recycle thread. */
++static void
++process_free_queue(VCHIQ_STATE_T *state)
++{
++ VCHIQ_SHARED_STATE_T *local = state->local;
++ BITSET_T service_found[BITSET_SIZE(VCHIQ_MAX_SERVICES)];
++ int slot_queue_available;
++
++ /* Use a read memory barrier to ensure that any state that may have
++ ** been modified by another thread is not masked by stale prefetched
++ ** values. */
++ rmb();
++
++ /* Find slots which have been freed by the other side, and return them
++ ** to the available queue. */
++ slot_queue_available = state->slot_queue_available;
++
++ while (slot_queue_available != local->slot_queue_recycle) {
++ unsigned int pos;
++ int slot_index = local->slot_queue[slot_queue_available++ &
++ VCHIQ_SLOT_QUEUE_MASK];
++ char *data = (char *)SLOT_DATA_FROM_INDEX(state, slot_index);
++ int data_found = 0;
++
++ vchiq_log_trace(vchiq_core_log_level, "%d: pfq %d=%x %x %x",
++ state->id, slot_index, (unsigned int)data,
++ local->slot_queue_recycle, slot_queue_available);
++
++ /* Initialise the bitmask for services which have used this
++ ** slot */
++ BITSET_ZERO(service_found);
++
++ pos = 0;
++
++ while (pos < VCHIQ_SLOT_SIZE) {
++ VCHIQ_HEADER_T *header =
++ (VCHIQ_HEADER_T *)(data + pos);
++ int msgid = header->msgid;
++ if (VCHIQ_MSG_TYPE(msgid) == VCHIQ_MSG_DATA) {
++ int port = VCHIQ_MSG_SRCPORT(msgid);
++ VCHIQ_SERVICE_QUOTA_T *service_quota =
++ &state->service_quotas[port];
++ int count;
++ spin_lock("a_spinlock);
++ count = service_quota->message_use_count;
++ if (count > 0)
++ service_quota->message_use_count =
++ count - 1;
++ spin_unlock("a_spinlock);
++
++ if (count == service_quota->message_quota)
++ /* Signal the service that it
++ ** has dropped below its quota
++ */
++ up(&service_quota->quota_event);
++ else if (count == 0) {
++ vchiq_log_error(vchiq_core_log_level,
++ "service %d "
++ "message_use_count=%d "
++ "(header %x, msgid %x, "
++ "header->msgid %x, "
++ "header->size %x)",
++ port,
++ service_quota->
++ message_use_count,
++ (unsigned int)header, msgid,
++ header->msgid,
++ header->size);
++ WARN(1, "invalid message use count\n");
++ }
++ if (!BITSET_IS_SET(service_found, port)) {
++ /* Set the found bit for this service */
++ BITSET_SET(service_found, port);
++
++ spin_lock("a_spinlock);
++ count = service_quota->slot_use_count;
++ if (count > 0)
++ service_quota->slot_use_count =
++ count - 1;
++ spin_unlock("a_spinlock);
++
++ if (count > 0) {
++ /* Signal the service in case
++ ** it has dropped below its
++ ** quota */
++ up(&service_quota->quota_event);
++ vchiq_log_trace(
++ vchiq_core_log_level,
++ "%d: pfq:%d %x@%x - "
++ "slot_use->%d",
++ state->id, port,
++ header->size,
++ (unsigned int)header,
++ count - 1);
++ } else {
++ vchiq_log_error(
++ vchiq_core_log_level,
++ "service %d "
++ "slot_use_count"
++ "=%d (header %x"
++ ", msgid %x, "
++ "header->msgid"
++ " %x, header->"
++ "size %x)",
++ port, count,
++ (unsigned int)header,
++ msgid,
++ header->msgid,
++ header->size);
++ WARN(1, "bad slot use count\n");
++ }
++ }
++
++ data_found = 1;
++ }
++
++ pos += calc_stride(header->size);
++ if (pos > VCHIQ_SLOT_SIZE) {
++ vchiq_log_error(vchiq_core_log_level,
++ "pfq - pos %x: header %x, msgid %x, "
++ "header->msgid %x, header->size %x",
++ pos, (unsigned int)header, msgid,
++ header->msgid, header->size);
++ WARN(1, "invalid slot position\n");
++ }
++ }
++
++ if (data_found) {
++ int count;
++ spin_lock("a_spinlock);
++ count = state->data_use_count;
++ if (count > 0)
++ state->data_use_count =
++ count - 1;
++ spin_unlock("a_spinlock);
++ if (count == state->data_quota)
++ up(&state->data_quota_event);
++ }
++
++ state->slot_queue_available = slot_queue_available;
++ up(&state->slot_available_event);
++ }
++}
++
++/* Called by the slot handler and application threads */
++static VCHIQ_STATUS_T
++queue_message(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service,
++ int msgid, const VCHIQ_ELEMENT_T *elements,
++ int count, int size, int is_blocking)
++{
++ VCHIQ_SHARED_STATE_T *local;
++ VCHIQ_SERVICE_QUOTA_T *service_quota = NULL;
++ VCHIQ_HEADER_T *header;
++ int type = VCHIQ_MSG_TYPE(msgid);
++
++ unsigned int stride;
++
++ local = state->local;
++
++ stride = calc_stride(size);
++
++ WARN_ON(!(stride <= VCHIQ_SLOT_SIZE));
++
++ if ((type != VCHIQ_MSG_RESUME) &&
++ (mutex_lock_interruptible(&state->slot_mutex) != 0))
++ return VCHIQ_RETRY;
++
++ if (type == VCHIQ_MSG_DATA) {
++ int tx_end_index;
++
++ BUG_ON(!service);
++
++ if (service->closing) {
++ /* The service has been closed */
++ mutex_unlock(&state->slot_mutex);
++ return VCHIQ_ERROR;
++ }
++
++ service_quota = &state->service_quotas[service->localport];
++
++ spin_lock("a_spinlock);
++
++ /* Ensure this service doesn't use more than its quota of
++ ** messages or slots */
++ tx_end_index = SLOT_QUEUE_INDEX_FROM_POS(
++ state->local_tx_pos + stride - 1);
++
++ /* Ensure data messages don't use more than their quota of
++ ** slots */
++ while ((tx_end_index != state->previous_data_index) &&
++ (state->data_use_count == state->data_quota)) {
++ VCHIQ_STATS_INC(state, data_stalls);
++ spin_unlock("a_spinlock);
++ mutex_unlock(&state->slot_mutex);
++
++ if (down_interruptible(&state->data_quota_event)
++ != 0)
++ return VCHIQ_RETRY;
++
++ mutex_lock(&state->slot_mutex);
++ spin_lock("a_spinlock);
++ tx_end_index = SLOT_QUEUE_INDEX_FROM_POS(
++ state->local_tx_pos + stride - 1);
++ if ((tx_end_index == state->previous_data_index) ||
++ (state->data_use_count < state->data_quota)) {
++ /* Pass the signal on to other waiters */
++ up(&state->data_quota_event);
++ break;
++ }
++ }
++
++ while ((service_quota->message_use_count ==
++ service_quota->message_quota) ||
++ ((tx_end_index != service_quota->previous_tx_index) &&
++ (service_quota->slot_use_count ==
++ service_quota->slot_quota))) {
++ spin_unlock("a_spinlock);
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: qm:%d %s,%x - quota stall "
++ "(msg %d, slot %d)",
++ state->id, service->localport,
++ msg_type_str(type), size,
++ service_quota->message_use_count,
++ service_quota->slot_use_count);
++ VCHIQ_SERVICE_STATS_INC(service, quota_stalls);
++ mutex_unlock(&state->slot_mutex);
++ if (down_interruptible(&service_quota->quota_event)
++ != 0)
++ return VCHIQ_RETRY;
++ if (service->closing)
++ return VCHIQ_ERROR;
++ if (mutex_lock_interruptible(&state->slot_mutex) != 0)
++ return VCHIQ_RETRY;
++ if (service->srvstate != VCHIQ_SRVSTATE_OPEN) {
++ /* The service has been closed */
++ mutex_unlock(&state->slot_mutex);
++ return VCHIQ_ERROR;
++ }
++ spin_lock("a_spinlock);
++ tx_end_index = SLOT_QUEUE_INDEX_FROM_POS(
++ state->local_tx_pos + stride - 1);
++ }
++
++ spin_unlock("a_spinlock);
++ }
++
++ header = reserve_space(state, stride, is_blocking);
++
++ if (!header) {
++ if (service)
++ VCHIQ_SERVICE_STATS_INC(service, slot_stalls);
++ mutex_unlock(&state->slot_mutex);
++ return VCHIQ_RETRY;
++ }
++
++ if (type == VCHIQ_MSG_DATA) {
++ int i, pos;
++ int tx_end_index;
++ int slot_use_count;
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: qm %s@%x,%x (%d->%d)",
++ state->id,
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)),
++ (unsigned int)header, size,
++ VCHIQ_MSG_SRCPORT(msgid),
++ VCHIQ_MSG_DSTPORT(msgid));
++
++ BUG_ON(!service);
++
++ for (i = 0, pos = 0; i < (unsigned int)count;
++ pos += elements[i++].size)
++ if (elements[i].size) {
++ if (vchiq_copy_from_user
++ (header->data + pos, elements[i].data,
++ (size_t) elements[i].size) !=
++ VCHIQ_SUCCESS) {
++ mutex_unlock(&state->slot_mutex);
++ VCHIQ_SERVICE_STATS_INC(service,
++ error_count);
++ return VCHIQ_ERROR;
++ }
++ if (i == 0) {
++ if (SRVTRACE_ENABLED(service,
++ VCHIQ_LOG_INFO))
++ vchiq_log_dump_mem("Sent", 0,
++ header->data + pos,
++ min(64u,
++ elements[0].size));
++ }
++ }
++
++ spin_lock("a_spinlock);
++ service_quota->message_use_count++;
++
++ tx_end_index =
++ SLOT_QUEUE_INDEX_FROM_POS(state->local_tx_pos - 1);
++
++ /* If this transmission can't fit in the last slot used by any
++ ** service, the data_use_count must be increased. */
++ if (tx_end_index != state->previous_data_index) {
++ state->previous_data_index = tx_end_index;
++ state->data_use_count++;
++ }
++
++ /* If this isn't the same slot last used by this service,
++ ** the service's slot_use_count must be increased. */
++ if (tx_end_index != service_quota->previous_tx_index) {
++ service_quota->previous_tx_index = tx_end_index;
++ slot_use_count = ++service_quota->slot_use_count;
++ } else {
++ slot_use_count = 0;
++ }
++
++ spin_unlock("a_spinlock);
++
++ if (slot_use_count)
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: qm:%d %s,%x - slot_use->%d (hdr %p)",
++ state->id, service->localport,
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), size,
++ slot_use_count, header);
++
++ VCHIQ_SERVICE_STATS_INC(service, ctrl_tx_count);
++ VCHIQ_SERVICE_STATS_ADD(service, ctrl_tx_bytes, size);
++ } else {
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: qm %s@%x,%x (%d->%d)", state->id,
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)),
++ (unsigned int)header, size,
++ VCHIQ_MSG_SRCPORT(msgid),
++ VCHIQ_MSG_DSTPORT(msgid));
++ if (size != 0) {
++ WARN_ON(!((count == 1) && (size == elements[0].size)));
++ memcpy(header->data, elements[0].data,
++ elements[0].size);
++ }
++ VCHIQ_STATS_INC(state, ctrl_tx_count);
++ }
++
++ header->msgid = msgid;
++ header->size = size;
++
++ {
++ int svc_fourcc;
++
++ svc_fourcc = service
++ ? service->base.fourcc
++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?');
++
++ vchiq_log_info(SRVTRACE_LEVEL(service),
++ "Sent Msg %s(%u) to %c%c%c%c s:%u d:%d len:%d",
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)),
++ VCHIQ_MSG_TYPE(msgid),
++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc),
++ VCHIQ_MSG_SRCPORT(msgid),
++ VCHIQ_MSG_DSTPORT(msgid),
++ size);
++ }
++
++ /* Make sure the new header is visible to the peer. */
++ wmb();
++
++ /* Make the new tx_pos visible to the peer. */
++ local->tx_pos = state->local_tx_pos;
++ wmb();
++
++ if (service && (type == VCHIQ_MSG_CLOSE))
++ vchiq_set_service_state(service, VCHIQ_SRVSTATE_CLOSESENT);
++
++ if (VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_PAUSE)
++ mutex_unlock(&state->slot_mutex);
++
++ remote_event_signal(&state->remote->trigger);
++
++ return VCHIQ_SUCCESS;
++}
++
++/* Called by the slot handler and application threads */
++static VCHIQ_STATUS_T
++queue_message_sync(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service,
++ int msgid, const VCHIQ_ELEMENT_T *elements,
++ int count, int size, int is_blocking)
++{
++ VCHIQ_SHARED_STATE_T *local;
++ VCHIQ_HEADER_T *header;
++
++ local = state->local;
++
++ if ((VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_RESUME) &&
++ (mutex_lock_interruptible(&state->sync_mutex) != 0))
++ return VCHIQ_RETRY;
++
++ remote_event_wait(&local->sync_release);
++
++ rmb();
++
++ header = (VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state,
++ local->slot_sync);
++
++ {
++ int oldmsgid = header->msgid;
++ if (oldmsgid != VCHIQ_MSGID_PADDING)
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: qms - msgid %x, not PADDING",
++ state->id, oldmsgid);
++ }
++
++ if (service) {
++ int i, pos;
++
++ vchiq_log_info(vchiq_sync_log_level,
++ "%d: qms %s@%x,%x (%d->%d)", state->id,
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)),
++ (unsigned int)header, size,
++ VCHIQ_MSG_SRCPORT(msgid),
++ VCHIQ_MSG_DSTPORT(msgid));
++
++ for (i = 0, pos = 0; i < (unsigned int)count;
++ pos += elements[i++].size)
++ if (elements[i].size) {
++ if (vchiq_copy_from_user
++ (header->data + pos, elements[i].data,
++ (size_t) elements[i].size) !=
++ VCHIQ_SUCCESS) {
++ mutex_unlock(&state->sync_mutex);
++ VCHIQ_SERVICE_STATS_INC(service,
++ error_count);
++ return VCHIQ_ERROR;
++ }
++ if (i == 0) {
++ if (vchiq_sync_log_level >=
++ VCHIQ_LOG_TRACE)
++ vchiq_log_dump_mem("Sent Sync",
++ 0, header->data + pos,
++ min(64u,
++ elements[0].size));
++ }
++ }
++
++ VCHIQ_SERVICE_STATS_INC(service, ctrl_tx_count);
++ VCHIQ_SERVICE_STATS_ADD(service, ctrl_tx_bytes, size);
++ } else {
++ vchiq_log_info(vchiq_sync_log_level,
++ "%d: qms %s@%x,%x (%d->%d)", state->id,
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)),
++ (unsigned int)header, size,
++ VCHIQ_MSG_SRCPORT(msgid),
++ VCHIQ_MSG_DSTPORT(msgid));
++ if (size != 0) {
++ WARN_ON(!((count == 1) && (size == elements[0].size)));
++ memcpy(header->data, elements[0].data,
++ elements[0].size);
++ }
++ VCHIQ_STATS_INC(state, ctrl_tx_count);
++ }
++
++ header->size = size;
++ header->msgid = msgid;
++
++ if (vchiq_sync_log_level >= VCHIQ_LOG_TRACE) {
++ int svc_fourcc;
++
++ svc_fourcc = service
++ ? service->base.fourcc
++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?');
++
++ vchiq_log_trace(vchiq_sync_log_level,
++ "Sent Sync Msg %s(%u) to %c%c%c%c s:%u d:%d len:%d",
++ msg_type_str(VCHIQ_MSG_TYPE(msgid)),
++ VCHIQ_MSG_TYPE(msgid),
++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc),
++ VCHIQ_MSG_SRCPORT(msgid),
++ VCHIQ_MSG_DSTPORT(msgid),
++ size);
++ }
++
++ /* Make sure the new header is visible to the peer. */
++ wmb();
++
++ remote_event_signal(&state->remote->sync_trigger);
++
++ if (VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_PAUSE)
++ mutex_unlock(&state->sync_mutex);
++
++ return VCHIQ_SUCCESS;
++}
++
++static inline void
++claim_slot(VCHIQ_SLOT_INFO_T *slot)
++{
++ slot->use_count++;
++}
++
++static void
++release_slot(VCHIQ_STATE_T *state, VCHIQ_SLOT_INFO_T *slot_info,
++ VCHIQ_HEADER_T *header, VCHIQ_SERVICE_T *service)
++{
++ int release_count;
++
++ mutex_lock(&state->recycle_mutex);
++
++ if (header) {
++ int msgid = header->msgid;
++ if (((msgid & VCHIQ_MSGID_CLAIMED) == 0) ||
++ (service && service->closing)) {
++ mutex_unlock(&state->recycle_mutex);
++ return;
++ }
++
++ /* Rewrite the message header to prevent a double
++ ** release */
++ header->msgid = msgid & ~VCHIQ_MSGID_CLAIMED;
++ }
++
++ release_count = slot_info->release_count;
++ slot_info->release_count = ++release_count;
++
++ if (release_count == slot_info->use_count) {
++ int slot_queue_recycle;
++ /* Add to the freed queue */
++
++ /* A read barrier is necessary here to prevent speculative
++ ** fetches of remote->slot_queue_recycle from overtaking the
++ ** mutex. */
++ rmb();
++
++ slot_queue_recycle = state->remote->slot_queue_recycle;
++ state->remote->slot_queue[slot_queue_recycle &
++ VCHIQ_SLOT_QUEUE_MASK] =
++ SLOT_INDEX_FROM_INFO(state, slot_info);
++ state->remote->slot_queue_recycle = slot_queue_recycle + 1;
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: release_slot %d - recycle->%x",
++ state->id, SLOT_INDEX_FROM_INFO(state, slot_info),
++ state->remote->slot_queue_recycle);
++
++ /* A write barrier is necessary, but remote_event_signal
++ ** contains one. */
++ remote_event_signal(&state->remote->recycle);
++ }
++
++ mutex_unlock(&state->recycle_mutex);
++}
++
++/* Called by the slot handler - don't hold the bulk mutex */
++static VCHIQ_STATUS_T
++notify_bulks(VCHIQ_SERVICE_T *service, VCHIQ_BULK_QUEUE_T *queue,
++ int retry_poll)
++{
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: nb:%d %cx - p=%x rn=%x r=%x",
++ service->state->id, service->localport,
++ (queue == &service->bulk_tx) ? 't' : 'r',
++ queue->process, queue->remote_notify, queue->remove);
++
++ if (service->state->is_master) {
++ while (queue->remote_notify != queue->process) {
++ VCHIQ_BULK_T *bulk =
++ &queue->bulks[BULK_INDEX(queue->remote_notify)];
++ int msgtype = (bulk->dir == VCHIQ_BULK_TRANSMIT) ?
++ VCHIQ_MSG_BULK_RX_DONE : VCHIQ_MSG_BULK_TX_DONE;
++ int msgid = VCHIQ_MAKE_MSG(msgtype, service->localport,
++ service->remoteport);
++ VCHIQ_ELEMENT_T element = { &bulk->actual, 4 };
++ /* Only reply to non-dummy bulk requests */
++ if (bulk->remote_data) {
++ status = queue_message(service->state, NULL,
++ msgid, &element, 1, 4, 0);
++ if (status != VCHIQ_SUCCESS)
++ break;
++ }
++ queue->remote_notify++;
++ }
++ } else {
++ queue->remote_notify = queue->process;
++ }
++
++ if (status == VCHIQ_SUCCESS) {
++ while (queue->remove != queue->remote_notify) {
++ VCHIQ_BULK_T *bulk =
++ &queue->bulks[BULK_INDEX(queue->remove)];
++
++ /* Only generate callbacks for non-dummy bulk
++ ** requests, and non-terminated services */
++ if (bulk->data && service->instance) {
++ if (bulk->actual != VCHIQ_BULK_ACTUAL_ABORTED) {
++ if (bulk->dir == VCHIQ_BULK_TRANSMIT) {
++ VCHIQ_SERVICE_STATS_INC(service,
++ bulk_tx_count);
++ VCHIQ_SERVICE_STATS_ADD(service,
++ bulk_tx_bytes,
++ bulk->actual);
++ } else {
++ VCHIQ_SERVICE_STATS_INC(service,
++ bulk_rx_count);
++ VCHIQ_SERVICE_STATS_ADD(service,
++ bulk_rx_bytes,
++ bulk->actual);
++ }
++ } else {
++ VCHIQ_SERVICE_STATS_INC(service,
++ bulk_aborted_count);
++ }
++ if (bulk->mode == VCHIQ_BULK_MODE_BLOCKING) {
++ struct bulk_waiter *waiter;
++ spin_lock(&bulk_waiter_spinlock);
++ waiter = bulk->userdata;
++ if (waiter) {
++ waiter->actual = bulk->actual;
++ up(&waiter->event);
++ }
++ spin_unlock(&bulk_waiter_spinlock);
++ } else if (bulk->mode ==
++ VCHIQ_BULK_MODE_CALLBACK) {
++ VCHIQ_REASON_T reason = (bulk->dir ==
++ VCHIQ_BULK_TRANSMIT) ?
++ ((bulk->actual ==
++ VCHIQ_BULK_ACTUAL_ABORTED) ?
++ VCHIQ_BULK_TRANSMIT_ABORTED :
++ VCHIQ_BULK_TRANSMIT_DONE) :
++ ((bulk->actual ==
++ VCHIQ_BULK_ACTUAL_ABORTED) ?
++ VCHIQ_BULK_RECEIVE_ABORTED :
++ VCHIQ_BULK_RECEIVE_DONE);
++ status = make_service_callback(service,
++ reason, NULL, bulk->userdata);
++ if (status == VCHIQ_RETRY)
++ break;
++ }
++ }
++
++ queue->remove++;
++ up(&service->bulk_remove_event);
++ }
++ if (!retry_poll)
++ status = VCHIQ_SUCCESS;
++ }
++
++ if (status == VCHIQ_RETRY)
++ request_poll(service->state, service,
++ (queue == &service->bulk_tx) ?
++ VCHIQ_POLL_TXNOTIFY : VCHIQ_POLL_RXNOTIFY);
++
++ return status;
++}
++
++/* Called by the slot handler thread */
++static void
++poll_services(VCHIQ_STATE_T *state)
++{
++ int group, i;
++
++ for (group = 0; group < BITSET_SIZE(state->unused_service); group++) {
++ uint32_t flags;
++ flags = atomic_xchg(&state->poll_services[group], 0);
++ for (i = 0; flags; i++) {
++ if (flags & (1 << i)) {
++ VCHIQ_SERVICE_T *service =
++ find_service_by_port(state,
++ (group<<5) + i);
++ uint32_t service_flags;
++ flags &= ~(1 << i);
++ if (!service)
++ continue;
++ service_flags =
++ atomic_xchg(&service->poll_flags, 0);
++ if (service_flags &
++ (1 << VCHIQ_POLL_REMOVE)) {
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: ps - remove %d<->%d",
++ state->id, service->localport,
++ service->remoteport);
++
++ /* Make it look like a client, because
++ it must be removed and not left in
++ the LISTENING state. */
++ service->public_fourcc =
++ VCHIQ_FOURCC_INVALID;
++
++ if (vchiq_close_service_internal(
++ service, 0/*!close_recvd*/) !=
++ VCHIQ_SUCCESS)
++ request_poll(state, service,
++ VCHIQ_POLL_REMOVE);
++ } else if (service_flags &
++ (1 << VCHIQ_POLL_TERMINATE)) {
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: ps - terminate %d<->%d",
++ state->id, service->localport,
++ service->remoteport);
++ if (vchiq_close_service_internal(
++ service, 0/*!close_recvd*/) !=
++ VCHIQ_SUCCESS)
++ request_poll(state, service,
++ VCHIQ_POLL_TERMINATE);
++ }
++ if (service_flags & (1 << VCHIQ_POLL_TXNOTIFY))
++ notify_bulks(service,
++ &service->bulk_tx,
++ 1/*retry_poll*/);
++ if (service_flags & (1 << VCHIQ_POLL_RXNOTIFY))
++ notify_bulks(service,
++ &service->bulk_rx,
++ 1/*retry_poll*/);
++ unlock_service(service);
++ }
++ }
++ }
++}
++
++/* Called by the slot handler or application threads, holding the bulk mutex. */
++static int
++resolve_bulks(VCHIQ_SERVICE_T *service, VCHIQ_BULK_QUEUE_T *queue)
++{
++ VCHIQ_STATE_T *state = service->state;
++ int resolved = 0;
++ int rc;
++
++ while ((queue->process != queue->local_insert) &&
++ (queue->process != queue->remote_insert)) {
++ VCHIQ_BULK_T *bulk = &queue->bulks[BULK_INDEX(queue->process)];
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: rb:%d %cx - li=%x ri=%x p=%x",
++ state->id, service->localport,
++ (queue == &service->bulk_tx) ? 't' : 'r',
++ queue->local_insert, queue->remote_insert,
++ queue->process);
++
++ WARN_ON(!((int)(queue->local_insert - queue->process) > 0));
++ WARN_ON(!((int)(queue->remote_insert - queue->process) > 0));
++
++ rc = mutex_lock_interruptible(&state->bulk_transfer_mutex);
++ if (rc != 0)
++ break;
++
++ vchiq_transfer_bulk(bulk);
++ mutex_unlock(&state->bulk_transfer_mutex);
++
++ if (SRVTRACE_ENABLED(service, VCHIQ_LOG_INFO)) {
++ const char *header = (queue == &service->bulk_tx) ?
++ "Send Bulk to" : "Recv Bulk from";
++ if (bulk->actual != VCHIQ_BULK_ACTUAL_ABORTED)
++ vchiq_log_info(SRVTRACE_LEVEL(service),
++ "%s %c%c%c%c d:%d len:%d %x<->%x",
++ header,
++ VCHIQ_FOURCC_AS_4CHARS(
++ service->base.fourcc),
++ service->remoteport,
++ bulk->size,
++ (unsigned int)bulk->data,
++ (unsigned int)bulk->remote_data);
++ else
++ vchiq_log_info(SRVTRACE_LEVEL(service),
++ "%s %c%c%c%c d:%d ABORTED - tx len:%d,"
++ " rx len:%d %x<->%x",
++ header,
++ VCHIQ_FOURCC_AS_4CHARS(
++ service->base.fourcc),
++ service->remoteport,
++ bulk->size,
++ bulk->remote_size,
++ (unsigned int)bulk->data,
++ (unsigned int)bulk->remote_data);
++ }
++
++ vchiq_complete_bulk(bulk);
++ queue->process++;
++ resolved++;
++ }
++ return resolved;
++}
++
++/* Called with the bulk_mutex held */
++static void
++abort_outstanding_bulks(VCHIQ_SERVICE_T *service, VCHIQ_BULK_QUEUE_T *queue)
++{
++ int is_tx = (queue == &service->bulk_tx);
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: aob:%d %cx - li=%x ri=%x p=%x",
++ service->state->id, service->localport, is_tx ? 't' : 'r',
++ queue->local_insert, queue->remote_insert, queue->process);
++
++ WARN_ON(!((int)(queue->local_insert - queue->process) >= 0));
++ WARN_ON(!((int)(queue->remote_insert - queue->process) >= 0));
++
++ while ((queue->process != queue->local_insert) ||
++ (queue->process != queue->remote_insert)) {
++ VCHIQ_BULK_T *bulk = &queue->bulks[BULK_INDEX(queue->process)];
++
++ if (queue->process == queue->remote_insert) {
++ /* fabricate a matching dummy bulk */
++ bulk->remote_data = NULL;
++ bulk->remote_size = 0;
++ queue->remote_insert++;
++ }
++
++ if (queue->process != queue->local_insert) {
++ vchiq_complete_bulk(bulk);
++
++ vchiq_log_info(SRVTRACE_LEVEL(service),
++ "%s %c%c%c%c d:%d ABORTED - tx len:%d, "
++ "rx len:%d",
++ is_tx ? "Send Bulk to" : "Recv Bulk from",
++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
++ service->remoteport,
++ bulk->size,
++ bulk->remote_size);
++ } else {
++ /* fabricate a matching dummy bulk */
++ bulk->data = NULL;
++ bulk->size = 0;
++ bulk->actual = VCHIQ_BULK_ACTUAL_ABORTED;
++ bulk->dir = is_tx ? VCHIQ_BULK_TRANSMIT :
++ VCHIQ_BULK_RECEIVE;
++ queue->local_insert++;
++ }
++
++ queue->process++;
++ }
++}
++
++/* Called from the slot handler thread */
++static void
++pause_bulks(VCHIQ_STATE_T *state)
++{
++ if (unlikely(atomic_inc_return(&pause_bulks_count) != 1)) {
++ WARN_ON_ONCE(1);
++ atomic_set(&pause_bulks_count, 1);
++ return;
++ }
++
++ /* Block bulk transfers from all services */
++ mutex_lock(&state->bulk_transfer_mutex);
++}
++
++/* Called from the slot handler thread */
++static void
++resume_bulks(VCHIQ_STATE_T *state)
++{
++ int i;
++ if (unlikely(atomic_dec_return(&pause_bulks_count) != 0)) {
++ WARN_ON_ONCE(1);
++ atomic_set(&pause_bulks_count, 0);
++ return;
++ }
++
++ /* Allow bulk transfers from all services */
++ mutex_unlock(&state->bulk_transfer_mutex);
++
++ if (state->deferred_bulks == 0)
++ return;
++
++ /* Deal with any bulks which had to be deferred due to being in
++ * paused state. Don't try to match up to number of deferred bulks
++ * in case we've had something come and close the service in the
++ * interim - just process all bulk queues for all services */
++ vchiq_log_info(vchiq_core_log_level, "%s: processing %d deferred bulks",
++ __func__, state->deferred_bulks);
++
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *service = state->services[i];
++ int resolved_rx = 0;
++ int resolved_tx = 0;
++ if (!service || (service->srvstate != VCHIQ_SRVSTATE_OPEN))
++ continue;
++
++ mutex_lock(&service->bulk_mutex);
++ resolved_rx = resolve_bulks(service, &service->bulk_rx);
++ resolved_tx = resolve_bulks(service, &service->bulk_tx);
++ mutex_unlock(&service->bulk_mutex);
++ if (resolved_rx)
++ notify_bulks(service, &service->bulk_rx, 1);
++ if (resolved_tx)
++ notify_bulks(service, &service->bulk_tx, 1);
++ }
++ state->deferred_bulks = 0;
++}
++
++static int
++parse_open(VCHIQ_STATE_T *state, VCHIQ_HEADER_T *header)
++{
++ VCHIQ_SERVICE_T *service = NULL;
++ int msgid, size;
++ int type;
++ unsigned int localport, remoteport;
++
++ msgid = header->msgid;
++ size = header->size;
++ type = VCHIQ_MSG_TYPE(msgid);
++ localport = VCHIQ_MSG_DSTPORT(msgid);
++ remoteport = VCHIQ_MSG_SRCPORT(msgid);
++ if (size >= sizeof(struct vchiq_open_payload)) {
++ const struct vchiq_open_payload *payload =
++ (struct vchiq_open_payload *)header->data;
++ unsigned int fourcc;
++
++ fourcc = payload->fourcc;
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: prs OPEN@%x (%d->'%c%c%c%c')",
++ state->id, (unsigned int)header,
++ localport,
++ VCHIQ_FOURCC_AS_4CHARS(fourcc));
++
++ service = get_listening_service(state, fourcc);
++
++ if (service) {
++ /* A matching service exists */
++ short version = payload->version;
++ short version_min = payload->version_min;
++ if ((service->version < version_min) ||
++ (version < service->version_min)) {
++ /* Version mismatch */
++ vchiq_loud_error_header();
++ vchiq_loud_error("%d: service %d (%c%c%c%c) "
++ "version mismatch - local (%d, min %d)"
++ " vs. remote (%d, min %d)",
++ state->id, service->localport,
++ VCHIQ_FOURCC_AS_4CHARS(fourcc),
++ service->version, service->version_min,
++ version, version_min);
++ vchiq_loud_error_footer();
++ unlock_service(service);
++ service = NULL;
++ goto fail_open;
++ }
++ service->peer_version = version;
++
++ if (service->srvstate == VCHIQ_SRVSTATE_LISTENING) {
++ struct vchiq_openack_payload ack_payload = {
++ service->version
++ };
++ VCHIQ_ELEMENT_T body = {
++ &ack_payload,
++ sizeof(ack_payload)
++ };
++
++ /* Acknowledge the OPEN */
++ if (service->sync) {
++ if (queue_message_sync(state, NULL,
++ VCHIQ_MAKE_MSG(
++ VCHIQ_MSG_OPENACK,
++ service->localport,
++ remoteport),
++ &body, 1, sizeof(ack_payload),
++ 0) == VCHIQ_RETRY)
++ goto bail_not_ready;
++ } else {
++ if (queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(
++ VCHIQ_MSG_OPENACK,
++ service->localport,
++ remoteport),
++ &body, 1, sizeof(ack_payload),
++ 0) == VCHIQ_RETRY)
++ goto bail_not_ready;
++ }
++
++ /* The service is now open */
++ vchiq_set_service_state(service,
++ service->sync ? VCHIQ_SRVSTATE_OPENSYNC
++ : VCHIQ_SRVSTATE_OPEN);
++ }
++
++ service->remoteport = remoteport;
++ service->client_id = ((int *)header->data)[1];
++ if (make_service_callback(service, VCHIQ_SERVICE_OPENED,
++ NULL, NULL) == VCHIQ_RETRY) {
++ /* Bail out if not ready */
++ service->remoteport = VCHIQ_PORT_FREE;
++ goto bail_not_ready;
++ }
++
++ /* Success - the message has been dealt with */
++ unlock_service(service);
++ return 1;
++ }
++ }
++
++fail_open:
++ /* No available service, or an invalid request - send a CLOSE */
++ if (queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_CLOSE, 0, VCHIQ_MSG_SRCPORT(msgid)),
++ NULL, 0, 0, 0) == VCHIQ_RETRY)
++ goto bail_not_ready;
++
++ return 1;
++
++bail_not_ready:
++ if (service)
++ unlock_service(service);
++
++ return 0;
++}
++
++/* Called by the slot handler thread */
++static void
++parse_rx_slots(VCHIQ_STATE_T *state)
++{
++ VCHIQ_SHARED_STATE_T *remote = state->remote;
++ VCHIQ_SERVICE_T *service = NULL;
++ int tx_pos;
++ DEBUG_INITIALISE(state->local)
++
++ tx_pos = remote->tx_pos;
++
++ while (state->rx_pos != tx_pos) {
++ VCHIQ_HEADER_T *header;
++ int msgid, size;
++ int type;
++ unsigned int localport, remoteport;
++
++ DEBUG_TRACE(PARSE_LINE);
++ if (!state->rx_data) {
++ int rx_index;
++ WARN_ON(!((state->rx_pos & VCHIQ_SLOT_MASK) == 0));
++ rx_index = remote->slot_queue[
++ SLOT_QUEUE_INDEX_FROM_POS(state->rx_pos) &
++ VCHIQ_SLOT_QUEUE_MASK];
++ state->rx_data = (char *)SLOT_DATA_FROM_INDEX(state,
++ rx_index);
++ state->rx_info = SLOT_INFO_FROM_INDEX(state, rx_index);
++
++ /* Initialise use_count to one, and increment
++ ** release_count at the end of the slot to avoid
++ ** releasing the slot prematurely. */
++ state->rx_info->use_count = 1;
++ state->rx_info->release_count = 0;
++ }
++
++ header = (VCHIQ_HEADER_T *)(state->rx_data +
++ (state->rx_pos & VCHIQ_SLOT_MASK));
++ DEBUG_VALUE(PARSE_HEADER, (int)header);
++ msgid = header->msgid;
++ DEBUG_VALUE(PARSE_MSGID, msgid);
++ size = header->size;
++ type = VCHIQ_MSG_TYPE(msgid);
++ localport = VCHIQ_MSG_DSTPORT(msgid);
++ remoteport = VCHIQ_MSG_SRCPORT(msgid);
++
++ if (type != VCHIQ_MSG_DATA)
++ VCHIQ_STATS_INC(state, ctrl_rx_count);
++
++ switch (type) {
++ case VCHIQ_MSG_OPENACK:
++ case VCHIQ_MSG_CLOSE:
++ case VCHIQ_MSG_DATA:
++ case VCHIQ_MSG_BULK_RX:
++ case VCHIQ_MSG_BULK_TX:
++ case VCHIQ_MSG_BULK_RX_DONE:
++ case VCHIQ_MSG_BULK_TX_DONE:
++ service = find_service_by_port(state, localport);
++ if ((!service ||
++ ((service->remoteport != remoteport) &&
++ (service->remoteport != VCHIQ_PORT_FREE))) &&
++ (localport == 0) &&
++ (type == VCHIQ_MSG_CLOSE)) {
++ /* This could be a CLOSE from a client which
++ hadn't yet received the OPENACK - look for
++ the connected service */
++ if (service)
++ unlock_service(service);
++ service = get_connected_service(state,
++ remoteport);
++ if (service)
++ vchiq_log_warning(vchiq_core_log_level,
++ "%d: prs %s@%x (%d->%d) - "
++ "found connected service %d",
++ state->id, msg_type_str(type),
++ (unsigned int)header,
++ remoteport, localport,
++ service->localport);
++ }
++
++ if (!service) {
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: prs %s@%x (%d->%d) - "
++ "invalid/closed service %d",
++ state->id, msg_type_str(type),
++ (unsigned int)header,
++ remoteport, localport, localport);
++ goto skip_message;
++ }
++ break;
++ default:
++ break;
++ }
++
++ if (SRVTRACE_ENABLED(service, VCHIQ_LOG_INFO)) {
++ int svc_fourcc;
++
++ svc_fourcc = service
++ ? service->base.fourcc
++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?');
++ vchiq_log_info(SRVTRACE_LEVEL(service),
++ "Rcvd Msg %s(%u) from %c%c%c%c s:%d d:%d "
++ "len:%d",
++ msg_type_str(type), type,
++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc),
++ remoteport, localport, size);
++ if (size > 0)
++ vchiq_log_dump_mem("Rcvd", 0, header->data,
++ min(64, size));
++ }
++
++ if (((unsigned int)header & VCHIQ_SLOT_MASK) + calc_stride(size)
++ > VCHIQ_SLOT_SIZE) {
++ vchiq_log_error(vchiq_core_log_level,
++ "header %x (msgid %x) - size %x too big for "
++ "slot",
++ (unsigned int)header, (unsigned int)msgid,
++ (unsigned int)size);
++ WARN(1, "oversized for slot\n");
++ }
++
++ switch (type) {
++ case VCHIQ_MSG_OPEN:
++ WARN_ON(!(VCHIQ_MSG_DSTPORT(msgid) == 0));
++ if (!parse_open(state, header))
++ goto bail_not_ready;
++ break;
++ case VCHIQ_MSG_OPENACK:
++ if (size >= sizeof(struct vchiq_openack_payload)) {
++ const struct vchiq_openack_payload *payload =
++ (struct vchiq_openack_payload *)
++ header->data;
++ service->peer_version = payload->version;
++ }
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: prs OPENACK@%x,%x (%d->%d) v:%d",
++ state->id, (unsigned int)header, size,
++ remoteport, localport, service->peer_version);
++ if (service->srvstate ==
++ VCHIQ_SRVSTATE_OPENING) {
++ service->remoteport = remoteport;
++ vchiq_set_service_state(service,
++ VCHIQ_SRVSTATE_OPEN);
++ up(&service->remove_event);
++ } else
++ vchiq_log_error(vchiq_core_log_level,
++ "OPENACK received in state %s",
++ srvstate_names[service->srvstate]);
++ break;
++ case VCHIQ_MSG_CLOSE:
++ WARN_ON(size != 0); /* There should be no data */
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: prs CLOSE@%x (%d->%d)",
++ state->id, (unsigned int)header,
++ remoteport, localport);
++
++ mark_service_closing_internal(service, 1);
++
++ if (vchiq_close_service_internal(service,
++ 1/*close_recvd*/) == VCHIQ_RETRY)
++ goto bail_not_ready;
++
++ vchiq_log_info(vchiq_core_log_level,
++ "Close Service %c%c%c%c s:%u d:%d",
++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc),
++ service->localport,
++ service->remoteport);
++ break;
++ case VCHIQ_MSG_DATA:
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: prs DATA@%x,%x (%d->%d)",
++ state->id, (unsigned int)header, size,
++ remoteport, localport);
++
++ if ((service->remoteport == remoteport)
++ && (service->srvstate ==
++ VCHIQ_SRVSTATE_OPEN)) {
++ header->msgid = msgid | VCHIQ_MSGID_CLAIMED;
++ claim_slot(state->rx_info);
++ DEBUG_TRACE(PARSE_LINE);
++ if (make_service_callback(service,
++ VCHIQ_MESSAGE_AVAILABLE, header,
++ NULL) == VCHIQ_RETRY) {
++ DEBUG_TRACE(PARSE_LINE);
++ goto bail_not_ready;
++ }
++ VCHIQ_SERVICE_STATS_INC(service, ctrl_rx_count);
++ VCHIQ_SERVICE_STATS_ADD(service, ctrl_rx_bytes,
++ size);
++ } else {
++ VCHIQ_STATS_INC(state, error_count);
++ }
++ break;
++ case VCHIQ_MSG_CONNECT:
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: prs CONNECT@%x",
++ state->id, (unsigned int)header);
++ up(&state->connect);
++ break;
++ case VCHIQ_MSG_BULK_RX:
++ case VCHIQ_MSG_BULK_TX: {
++ VCHIQ_BULK_QUEUE_T *queue;
++ WARN_ON(!state->is_master);
++ queue = (type == VCHIQ_MSG_BULK_RX) ?
++ &service->bulk_tx : &service->bulk_rx;
++ if ((service->remoteport == remoteport)
++ && (service->srvstate ==
++ VCHIQ_SRVSTATE_OPEN)) {
++ VCHIQ_BULK_T *bulk;
++ int resolved = 0;
++
++ DEBUG_TRACE(PARSE_LINE);
++ if (mutex_lock_interruptible(
++ &service->bulk_mutex) != 0) {
++ DEBUG_TRACE(PARSE_LINE);
++ goto bail_not_ready;
++ }
++
++ WARN_ON(!(queue->remote_insert < queue->remove +
++ VCHIQ_NUM_SERVICE_BULKS));
++ bulk = &queue->bulks[
++ BULK_INDEX(queue->remote_insert)];
++ bulk->remote_data =
++ (void *)((int *)header->data)[0];
++ bulk->remote_size = ((int *)header->data)[1];
++ wmb();
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: prs %s@%x (%d->%d) %x@%x",
++ state->id, msg_type_str(type),
++ (unsigned int)header,
++ remoteport, localport,
++ bulk->remote_size,
++ (unsigned int)bulk->remote_data);
++
++ queue->remote_insert++;
++
++ if (atomic_read(&pause_bulks_count)) {
++ state->deferred_bulks++;
++ vchiq_log_info(vchiq_core_log_level,
++ "%s: deferring bulk (%d)",
++ __func__,
++ state->deferred_bulks);
++ if (state->conn_state !=
++ VCHIQ_CONNSTATE_PAUSE_SENT)
++ vchiq_log_error(
++ vchiq_core_log_level,
++ "%s: bulks paused in "
++ "unexpected state %s",
++ __func__,
++ conn_state_names[
++ state->conn_state]);
++ } else if (state->conn_state ==
++ VCHIQ_CONNSTATE_CONNECTED) {
++ DEBUG_TRACE(PARSE_LINE);
++ resolved = resolve_bulks(service,
++ queue);
++ }
++
++ mutex_unlock(&service->bulk_mutex);
++ if (resolved)
++ notify_bulks(service, queue,
++ 1/*retry_poll*/);
++ }
++ } break;
++ case VCHIQ_MSG_BULK_RX_DONE:
++ case VCHIQ_MSG_BULK_TX_DONE:
++ WARN_ON(state->is_master);
++ if ((service->remoteport == remoteport)
++ && (service->srvstate !=
++ VCHIQ_SRVSTATE_FREE)) {
++ VCHIQ_BULK_QUEUE_T *queue;
++ VCHIQ_BULK_T *bulk;
++
++ queue = (type == VCHIQ_MSG_BULK_RX_DONE) ?
++ &service->bulk_rx : &service->bulk_tx;
++
++ DEBUG_TRACE(PARSE_LINE);
++ if (mutex_lock_interruptible(
++ &service->bulk_mutex) != 0) {
++ DEBUG_TRACE(PARSE_LINE);
++ goto bail_not_ready;
++ }
++ if ((int)(queue->remote_insert -
++ queue->local_insert) >= 0) {
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: prs %s@%x (%d->%d) "
++ "unexpected (ri=%d,li=%d)",
++ state->id, msg_type_str(type),
++ (unsigned int)header,
++ remoteport, localport,
++ queue->remote_insert,
++ queue->local_insert);
++ mutex_unlock(&service->bulk_mutex);
++ break;
++ }
++
++ BUG_ON(queue->process == queue->local_insert);
++ BUG_ON(queue->process != queue->remote_insert);
++
++ bulk = &queue->bulks[
++ BULK_INDEX(queue->remote_insert)];
++ bulk->actual = *(int *)header->data;
++ queue->remote_insert++;
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: prs %s@%x (%d->%d) %x@%x",
++ state->id, msg_type_str(type),
++ (unsigned int)header,
++ remoteport, localport,
++ bulk->actual, (unsigned int)bulk->data);
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: prs:%d %cx li=%x ri=%x p=%x",
++ state->id, localport,
++ (type == VCHIQ_MSG_BULK_RX_DONE) ?
++ 'r' : 't',
++ queue->local_insert,
++ queue->remote_insert, queue->process);
++
++ DEBUG_TRACE(PARSE_LINE);
++ WARN_ON(queue->process == queue->local_insert);
++ vchiq_complete_bulk(bulk);
++ queue->process++;
++ mutex_unlock(&service->bulk_mutex);
++ DEBUG_TRACE(PARSE_LINE);
++ notify_bulks(service, queue, 1/*retry_poll*/);
++ DEBUG_TRACE(PARSE_LINE);
++ }
++ break;
++ case VCHIQ_MSG_PADDING:
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: prs PADDING@%x,%x",
++ state->id, (unsigned int)header, size);
++ break;
++ case VCHIQ_MSG_PAUSE:
++ /* If initiated, signal the application thread */
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: prs PAUSE@%x,%x",
++ state->id, (unsigned int)header, size);
++ if (state->conn_state == VCHIQ_CONNSTATE_PAUSED) {
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: PAUSE received in state PAUSED",
++ state->id);
++ break;
++ }
++ if (state->conn_state != VCHIQ_CONNSTATE_PAUSE_SENT) {
++ /* Send a PAUSE in response */
++ if (queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_PAUSE, 0, 0),
++ NULL, 0, 0, 0) == VCHIQ_RETRY)
++ goto bail_not_ready;
++ if (state->is_master)
++ pause_bulks(state);
++ }
++ /* At this point slot_mutex is held */
++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_PAUSED);
++ vchiq_platform_paused(state);
++ break;
++ case VCHIQ_MSG_RESUME:
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: prs RESUME@%x,%x",
++ state->id, (unsigned int)header, size);
++ /* Release the slot mutex */
++ mutex_unlock(&state->slot_mutex);
++ if (state->is_master)
++ resume_bulks(state);
++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED);
++ vchiq_platform_resumed(state);
++ break;
++
++ case VCHIQ_MSG_REMOTE_USE:
++ vchiq_on_remote_use(state);
++ break;
++ case VCHIQ_MSG_REMOTE_RELEASE:
++ vchiq_on_remote_release(state);
++ break;
++ case VCHIQ_MSG_REMOTE_USE_ACTIVE:
++ vchiq_on_remote_use_active(state);
++ break;
++
++ default:
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: prs invalid msgid %x@%x,%x",
++ state->id, msgid, (unsigned int)header, size);
++ WARN(1, "invalid message\n");
++ break;
++ }
++
++skip_message:
++ if (service) {
++ unlock_service(service);
++ service = NULL;
++ }
++
++ state->rx_pos += calc_stride(size);
++
++ DEBUG_TRACE(PARSE_LINE);
++ /* Perform some housekeeping when the end of the slot is
++ ** reached. */
++ if ((state->rx_pos & VCHIQ_SLOT_MASK) == 0) {
++ /* Remove the extra reference count. */
++ release_slot(state, state->rx_info, NULL, NULL);
++ state->rx_data = NULL;
++ }
++ }
++
++bail_not_ready:
++ if (service)
++ unlock_service(service);
++}
++
++/* Called by the slot handler thread */
++static int
++slot_handler_func(void *v)
++{
++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v;
++ VCHIQ_SHARED_STATE_T *local = state->local;
++ DEBUG_INITIALISE(local)
++
++ while (1) {
++ DEBUG_COUNT(SLOT_HANDLER_COUNT);
++ DEBUG_TRACE(SLOT_HANDLER_LINE);
++ remote_event_wait(&local->trigger);
++
++ rmb();
++
++ DEBUG_TRACE(SLOT_HANDLER_LINE);
++ if (state->poll_needed) {
++ /* Check if we need to suspend - may change our
++ * conn_state */
++ vchiq_platform_check_suspend(state);
++
++ state->poll_needed = 0;
++
++ /* Handle service polling and other rare conditions here
++ ** out of the mainline code */
++ switch (state->conn_state) {
++ case VCHIQ_CONNSTATE_CONNECTED:
++ /* Poll the services as requested */
++ poll_services(state);
++ break;
++
++ case VCHIQ_CONNSTATE_PAUSING:
++ if (state->is_master)
++ pause_bulks(state);
++ if (queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_PAUSE, 0, 0),
++ NULL, 0, 0, 0) != VCHIQ_RETRY) {
++ vchiq_set_conn_state(state,
++ VCHIQ_CONNSTATE_PAUSE_SENT);
++ } else {
++ if (state->is_master)
++ resume_bulks(state);
++ /* Retry later */
++ state->poll_needed = 1;
++ }
++ break;
++
++ case VCHIQ_CONNSTATE_PAUSED:
++ vchiq_platform_resume(state);
++ break;
++
++ case VCHIQ_CONNSTATE_RESUMING:
++ if (queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_RESUME, 0, 0),
++ NULL, 0, 0, 0) != VCHIQ_RETRY) {
++ if (state->is_master)
++ resume_bulks(state);
++ vchiq_set_conn_state(state,
++ VCHIQ_CONNSTATE_CONNECTED);
++ vchiq_platform_resumed(state);
++ } else {
++ /* This should really be impossible,
++ ** since the PAUSE should have flushed
++ ** through outstanding messages. */
++ vchiq_log_error(vchiq_core_log_level,
++ "Failed to send RESUME "
++ "message");
++ BUG();
++ }
++ break;
++
++ case VCHIQ_CONNSTATE_PAUSE_TIMEOUT:
++ case VCHIQ_CONNSTATE_RESUME_TIMEOUT:
++ vchiq_platform_handle_timeout(state);
++ break;
++ default:
++ break;
++ }
++
++
++ }
++
++ DEBUG_TRACE(SLOT_HANDLER_LINE);
++ parse_rx_slots(state);
++ }
++ return 0;
++}
++
++
++/* Called by the recycle thread */
++static int
++recycle_func(void *v)
++{
++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v;
++ VCHIQ_SHARED_STATE_T *local = state->local;
++
++ while (1) {
++ remote_event_wait(&local->recycle);
++
++ process_free_queue(state);
++ }
++ return 0;
++}
++
++
++/* Called by the sync thread */
++static int
++sync_func(void *v)
++{
++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v;
++ VCHIQ_SHARED_STATE_T *local = state->local;
++ VCHIQ_HEADER_T *header = (VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state,
++ state->remote->slot_sync);
++
++ while (1) {
++ VCHIQ_SERVICE_T *service;
++ int msgid, size;
++ int type;
++ unsigned int localport, remoteport;
++
++ remote_event_wait(&local->sync_trigger);
++
++ rmb();
++
++ msgid = header->msgid;
++ size = header->size;
++ type = VCHIQ_MSG_TYPE(msgid);
++ localport = VCHIQ_MSG_DSTPORT(msgid);
++ remoteport = VCHIQ_MSG_SRCPORT(msgid);
++
++ service = find_service_by_port(state, localport);
++
++ if (!service) {
++ vchiq_log_error(vchiq_sync_log_level,
++ "%d: sf %s@%x (%d->%d) - "
++ "invalid/closed service %d",
++ state->id, msg_type_str(type),
++ (unsigned int)header,
++ remoteport, localport, localport);
++ release_message_sync(state, header);
++ continue;
++ }
++
++ if (vchiq_sync_log_level >= VCHIQ_LOG_TRACE) {
++ int svc_fourcc;
++
++ svc_fourcc = service
++ ? service->base.fourcc
++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?');
++ vchiq_log_trace(vchiq_sync_log_level,
++ "Rcvd Msg %s from %c%c%c%c s:%d d:%d len:%d",
++ msg_type_str(type),
++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc),
++ remoteport, localport, size);
++ if (size > 0)
++ vchiq_log_dump_mem("Rcvd", 0, header->data,
++ min(64, size));
++ }
++
++ switch (type) {
++ case VCHIQ_MSG_OPENACK:
++ if (size >= sizeof(struct vchiq_openack_payload)) {
++ const struct vchiq_openack_payload *payload =
++ (struct vchiq_openack_payload *)
++ header->data;
++ service->peer_version = payload->version;
++ }
++ vchiq_log_info(vchiq_sync_log_level,
++ "%d: sf OPENACK@%x,%x (%d->%d) v:%d",
++ state->id, (unsigned int)header, size,
++ remoteport, localport, service->peer_version);
++ if (service->srvstate == VCHIQ_SRVSTATE_OPENING) {
++ service->remoteport = remoteport;
++ vchiq_set_service_state(service,
++ VCHIQ_SRVSTATE_OPENSYNC);
++ up(&service->remove_event);
++ }
++ release_message_sync(state, header);
++ break;
++
++ case VCHIQ_MSG_DATA:
++ vchiq_log_trace(vchiq_sync_log_level,
++ "%d: sf DATA@%x,%x (%d->%d)",
++ state->id, (unsigned int)header, size,
++ remoteport, localport);
++
++ if ((service->remoteport == remoteport) &&
++ (service->srvstate ==
++ VCHIQ_SRVSTATE_OPENSYNC)) {
++ if (make_service_callback(service,
++ VCHIQ_MESSAGE_AVAILABLE, header,
++ NULL) == VCHIQ_RETRY)
++ vchiq_log_error(vchiq_sync_log_level,
++ "synchronous callback to "
++ "service %d returns "
++ "VCHIQ_RETRY",
++ localport);
++ }
++ break;
++
++ default:
++ vchiq_log_error(vchiq_sync_log_level,
++ "%d: sf unexpected msgid %x@%x,%x",
++ state->id, msgid, (unsigned int)header, size);
++ release_message_sync(state, header);
++ break;
++ }
++
++ unlock_service(service);
++ }
++
++ return 0;
++}
++
++
++static void
++init_bulk_queue(VCHIQ_BULK_QUEUE_T *queue)
++{
++ queue->local_insert = 0;
++ queue->remote_insert = 0;
++ queue->process = 0;
++ queue->remote_notify = 0;
++ queue->remove = 0;
++}
++
++
++inline const char *
++get_conn_state_name(VCHIQ_CONNSTATE_T conn_state)
++{
++ return conn_state_names[conn_state];
++}
++
++
++VCHIQ_SLOT_ZERO_T *
++vchiq_init_slots(void *mem_base, int mem_size)
++{
++ int mem_align = (VCHIQ_SLOT_SIZE - (int)mem_base) & VCHIQ_SLOT_MASK;
++ VCHIQ_SLOT_ZERO_T *slot_zero =
++ (VCHIQ_SLOT_ZERO_T *)((char *)mem_base + mem_align);
++ int num_slots = (mem_size - mem_align)/VCHIQ_SLOT_SIZE;
++ int first_data_slot = VCHIQ_SLOT_ZERO_SLOTS;
++
++ /* Ensure there is enough memory to run an absolutely minimum system */
++ num_slots -= first_data_slot;
++
++ if (num_slots < 4) {
++ vchiq_log_error(vchiq_core_log_level,
++ "vchiq_init_slots - insufficient memory %x bytes",
++ mem_size);
++ return NULL;
++ }
++
++ memset(slot_zero, 0, sizeof(VCHIQ_SLOT_ZERO_T));
++
++ slot_zero->magic = VCHIQ_MAGIC;
++ slot_zero->version = VCHIQ_VERSION;
++ slot_zero->version_min = VCHIQ_VERSION_MIN;
++ slot_zero->slot_zero_size = sizeof(VCHIQ_SLOT_ZERO_T);
++ slot_zero->slot_size = VCHIQ_SLOT_SIZE;
++ slot_zero->max_slots = VCHIQ_MAX_SLOTS;
++ slot_zero->max_slots_per_side = VCHIQ_MAX_SLOTS_PER_SIDE;
++
++ slot_zero->master.slot_sync = first_data_slot;
++ slot_zero->master.slot_first = first_data_slot + 1;
++ slot_zero->master.slot_last = first_data_slot + (num_slots/2) - 1;
++ slot_zero->slave.slot_sync = first_data_slot + (num_slots/2);
++ slot_zero->slave.slot_first = first_data_slot + (num_slots/2) + 1;
++ slot_zero->slave.slot_last = first_data_slot + num_slots - 1;
++
++ return slot_zero;
++}
++
++VCHIQ_STATUS_T
++vchiq_init_state(VCHIQ_STATE_T *state, VCHIQ_SLOT_ZERO_T *slot_zero,
++ int is_master)
++{
++ VCHIQ_SHARED_STATE_T *local;
++ VCHIQ_SHARED_STATE_T *remote;
++ VCHIQ_STATUS_T status;
++ char threadname[10];
++ static int id;
++ int i;
++
++ vchiq_log_warning(vchiq_core_log_level,
++ "%s: slot_zero = 0x%08lx, is_master = %d",
++ __func__, (unsigned long)slot_zero, is_master);
++
++ /* Check the input configuration */
++
++ if (slot_zero->magic != VCHIQ_MAGIC) {
++ vchiq_loud_error_header();
++ vchiq_loud_error("Invalid VCHIQ magic value found.");
++ vchiq_loud_error("slot_zero=%x: magic=%x (expected %x)",
++ (unsigned int)slot_zero, slot_zero->magic, VCHIQ_MAGIC);
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++
++ if (slot_zero->version < VCHIQ_VERSION_MIN) {
++ vchiq_loud_error_header();
++ vchiq_loud_error("Incompatible VCHIQ versions found.");
++ vchiq_loud_error("slot_zero=%x: VideoCore version=%d "
++ "(minimum %d)",
++ (unsigned int)slot_zero, slot_zero->version,
++ VCHIQ_VERSION_MIN);
++ vchiq_loud_error("Restart with a newer VideoCore image.");
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++
++ if (VCHIQ_VERSION < slot_zero->version_min) {
++ vchiq_loud_error_header();
++ vchiq_loud_error("Incompatible VCHIQ versions found.");
++ vchiq_loud_error("slot_zero=%x: version=%d (VideoCore "
++ "minimum %d)",
++ (unsigned int)slot_zero, VCHIQ_VERSION,
++ slot_zero->version_min);
++ vchiq_loud_error("Restart with a newer kernel.");
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++
++ if ((slot_zero->slot_zero_size != sizeof(VCHIQ_SLOT_ZERO_T)) ||
++ (slot_zero->slot_size != VCHIQ_SLOT_SIZE) ||
++ (slot_zero->max_slots != VCHIQ_MAX_SLOTS) ||
++ (slot_zero->max_slots_per_side != VCHIQ_MAX_SLOTS_PER_SIDE)) {
++ vchiq_loud_error_header();
++ if (slot_zero->slot_zero_size != sizeof(VCHIQ_SLOT_ZERO_T))
++ vchiq_loud_error("slot_zero=%x: slot_zero_size=%x "
++ "(expected %x)",
++ (unsigned int)slot_zero,
++ slot_zero->slot_zero_size,
++ sizeof(VCHIQ_SLOT_ZERO_T));
++ if (slot_zero->slot_size != VCHIQ_SLOT_SIZE)
++ vchiq_loud_error("slot_zero=%x: slot_size=%d "
++ "(expected %d",
++ (unsigned int)slot_zero, slot_zero->slot_size,
++ VCHIQ_SLOT_SIZE);
++ if (slot_zero->max_slots != VCHIQ_MAX_SLOTS)
++ vchiq_loud_error("slot_zero=%x: max_slots=%d "
++ "(expected %d)",
++ (unsigned int)slot_zero, slot_zero->max_slots,
++ VCHIQ_MAX_SLOTS);
++ if (slot_zero->max_slots_per_side != VCHIQ_MAX_SLOTS_PER_SIDE)
++ vchiq_loud_error("slot_zero=%x: max_slots_per_side=%d "
++ "(expected %d)",
++ (unsigned int)slot_zero,
++ slot_zero->max_slots_per_side,
++ VCHIQ_MAX_SLOTS_PER_SIDE);
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++
++ if (is_master) {
++ local = &slot_zero->master;
++ remote = &slot_zero->slave;
++ } else {
++ local = &slot_zero->slave;
++ remote = &slot_zero->master;
++ }
++
++ if (local->initialised) {
++ vchiq_loud_error_header();
++ if (remote->initialised)
++ vchiq_loud_error("local state has already been "
++ "initialised");
++ else
++ vchiq_loud_error("master/slave mismatch - two %ss",
++ is_master ? "master" : "slave");
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++
++ memset(state, 0, sizeof(VCHIQ_STATE_T));
++
++ state->id = id++;
++ state->is_master = is_master;
++
++ /*
++ initialize shared state pointers
++ */
++
++ state->local = local;
++ state->remote = remote;
++ state->slot_data = (VCHIQ_SLOT_T *)slot_zero;
++
++ /*
++ initialize events and mutexes
++ */
++
++ sema_init(&state->connect, 0);
++ mutex_init(&state->mutex);
++ sema_init(&state->trigger_event, 0);
++ sema_init(&state->recycle_event, 0);
++ sema_init(&state->sync_trigger_event, 0);
++ sema_init(&state->sync_release_event, 0);
++
++ mutex_init(&state->slot_mutex);
++ mutex_init(&state->recycle_mutex);
++ mutex_init(&state->sync_mutex);
++ mutex_init(&state->bulk_transfer_mutex);
++
++ sema_init(&state->slot_available_event, 0);
++ sema_init(&state->slot_remove_event, 0);
++ sema_init(&state->data_quota_event, 0);
++
++ state->slot_queue_available = 0;
++
++ for (i = 0; i < VCHIQ_MAX_SERVICES; i++) {
++ VCHIQ_SERVICE_QUOTA_T *service_quota =
++ &state->service_quotas[i];
++ sema_init(&service_quota->quota_event, 0);
++ }
++
++ for (i = local->slot_first; i <= local->slot_last; i++) {
++ local->slot_queue[state->slot_queue_available++] = i;
++ up(&state->slot_available_event);
++ }
++
++ state->default_slot_quota = state->slot_queue_available/2;
++ state->default_message_quota =
++ min((unsigned short)(state->default_slot_quota * 256),
++ (unsigned short)~0);
++
++ state->previous_data_index = -1;
++ state->data_use_count = 0;
++ state->data_quota = state->slot_queue_available - 1;
++
++ local->trigger.event = &state->trigger_event;
++ remote_event_create(&local->trigger);
++ local->tx_pos = 0;
++
++ local->recycle.event = &state->recycle_event;
++ remote_event_create(&local->recycle);
++ local->slot_queue_recycle = state->slot_queue_available;
++
++ local->sync_trigger.event = &state->sync_trigger_event;
++ remote_event_create(&local->sync_trigger);
++
++ local->sync_release.event = &state->sync_release_event;
++ remote_event_create(&local->sync_release);
++
++ /* At start-of-day, the slot is empty and available */
++ ((VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state, local->slot_sync))->msgid
++ = VCHIQ_MSGID_PADDING;
++ remote_event_signal_local(&local->sync_release);
++
++ local->debug[DEBUG_ENTRIES] = DEBUG_MAX;
++
++ status = vchiq_platform_init_state(state);
++
++ /*
++ bring up slot handler thread
++ */
++ snprintf(threadname, sizeof(threadname), "VCHIQ-%d", state->id);
++ state->slot_handler_thread = kthread_create(&slot_handler_func,
++ (void *)state,
++ threadname);
++
++ if (state->slot_handler_thread == NULL) {
++ vchiq_loud_error_header();
++ vchiq_loud_error("couldn't create thread %s", threadname);
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++ set_user_nice(state->slot_handler_thread, -19);
++ wake_up_process(state->slot_handler_thread);
++
++ snprintf(threadname, sizeof(threadname), "VCHIQr-%d", state->id);
++ state->recycle_thread = kthread_create(&recycle_func,
++ (void *)state,
++ threadname);
++ if (state->recycle_thread == NULL) {
++ vchiq_loud_error_header();
++ vchiq_loud_error("couldn't create thread %s", threadname);
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++ set_user_nice(state->recycle_thread, -19);
++ wake_up_process(state->recycle_thread);
++
++ snprintf(threadname, sizeof(threadname), "VCHIQs-%d", state->id);
++ state->sync_thread = kthread_create(&sync_func,
++ (void *)state,
++ threadname);
++ if (state->sync_thread == NULL) {
++ vchiq_loud_error_header();
++ vchiq_loud_error("couldn't create thread %s", threadname);
++ vchiq_loud_error_footer();
++ return VCHIQ_ERROR;
++ }
++ set_user_nice(state->sync_thread, -20);
++ wake_up_process(state->sync_thread);
++
++ BUG_ON(state->id >= VCHIQ_MAX_STATES);
++ vchiq_states[state->id] = state;
++
++ /* Indicate readiness to the other side */
++ local->initialised = 1;
++
++ return status;
++}
++
++/* Called from application thread when a client or server service is created. */
++VCHIQ_SERVICE_T *
++vchiq_add_service_internal(VCHIQ_STATE_T *state,
++ const VCHIQ_SERVICE_PARAMS_T *params, int srvstate,
++ VCHIQ_INSTANCE_T instance, VCHIQ_USERDATA_TERM_T userdata_term)
++{
++ VCHIQ_SERVICE_T *service;
++
++ service = kmalloc(sizeof(VCHIQ_SERVICE_T), GFP_KERNEL);
++ if (service) {
++ service->base.fourcc = params->fourcc;
++ service->base.callback = params->callback;
++ service->base.userdata = params->userdata;
++ service->handle = VCHIQ_SERVICE_HANDLE_INVALID;
++ service->ref_count = 1;
++ service->srvstate = VCHIQ_SRVSTATE_FREE;
++ service->userdata_term = userdata_term;
++ service->localport = VCHIQ_PORT_FREE;
++ service->remoteport = VCHIQ_PORT_FREE;
++
++ service->public_fourcc = (srvstate == VCHIQ_SRVSTATE_OPENING) ?
++ VCHIQ_FOURCC_INVALID : params->fourcc;
++ service->client_id = 0;
++ service->auto_close = 1;
++ service->sync = 0;
++ service->closing = 0;
++ service->trace = 0;
++ atomic_set(&service->poll_flags, 0);
++ service->version = params->version;
++ service->version_min = params->version_min;
++ service->state = state;
++ service->instance = instance;
++ service->service_use_count = 0;
++ init_bulk_queue(&service->bulk_tx);
++ init_bulk_queue(&service->bulk_rx);
++ sema_init(&service->remove_event, 0);
++ sema_init(&service->bulk_remove_event, 0);
++ mutex_init(&service->bulk_mutex);
++ memset(&service->stats, 0, sizeof(service->stats));
++ } else {
++ vchiq_log_error(vchiq_core_log_level,
++ "Out of memory");
++ }
++
++ if (service) {
++ VCHIQ_SERVICE_T **pservice = NULL;
++ int i;
++
++ /* Although it is perfectly possible to use service_spinlock
++ ** to protect the creation of services, it is overkill as it
++ ** disables interrupts while the array is searched.
++ ** The only danger is of another thread trying to create a
++ ** service - service deletion is safe.
++ ** Therefore it is preferable to use state->mutex which,
++ ** although slower to claim, doesn't block interrupts while
++ ** it is held.
++ */
++
++ mutex_lock(&state->mutex);
++
++ /* Prepare to use a previously unused service */
++ if (state->unused_service < VCHIQ_MAX_SERVICES)
++ pservice = &state->services[state->unused_service];
++
++ if (srvstate == VCHIQ_SRVSTATE_OPENING) {
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *srv = state->services[i];
++ if (!srv) {
++ pservice = &state->services[i];
++ break;
++ }
++ }
++ } else {
++ for (i = (state->unused_service - 1); i >= 0; i--) {
++ VCHIQ_SERVICE_T *srv = state->services[i];
++ if (!srv)
++ pservice = &state->services[i];
++ else if ((srv->public_fourcc == params->fourcc)
++ && ((srv->instance != instance) ||
++ (srv->base.callback !=
++ params->callback))) {
++ /* There is another server using this
++ ** fourcc which doesn't match. */
++ pservice = NULL;
++ break;
++ }
++ }
++ }
++
++ if (pservice) {
++ service->localport = (pservice - state->services);
++ if (!handle_seq)
++ handle_seq = VCHIQ_MAX_STATES *
++ VCHIQ_MAX_SERVICES;
++ service->handle = handle_seq |
++ (state->id * VCHIQ_MAX_SERVICES) |
++ service->localport;
++ handle_seq += VCHIQ_MAX_STATES * VCHIQ_MAX_SERVICES;
++ *pservice = service;
++ if (pservice == &state->services[state->unused_service])
++ state->unused_service++;
++ }
++
++ mutex_unlock(&state->mutex);
++
++ if (!pservice) {
++ kfree(service);
++ service = NULL;
++ }
++ }
++
++ if (service) {
++ VCHIQ_SERVICE_QUOTA_T *service_quota =
++ &state->service_quotas[service->localport];
++ service_quota->slot_quota = state->default_slot_quota;
++ service_quota->message_quota = state->default_message_quota;
++ if (service_quota->slot_use_count == 0)
++ service_quota->previous_tx_index =
++ SLOT_QUEUE_INDEX_FROM_POS(state->local_tx_pos)
++ - 1;
++
++ /* Bring this service online */
++ vchiq_set_service_state(service, srvstate);
++
++ vchiq_log_info(vchiq_core_msg_log_level,
++ "%s Service %c%c%c%c SrcPort:%d",
++ (srvstate == VCHIQ_SRVSTATE_OPENING)
++ ? "Open" : "Add",
++ VCHIQ_FOURCC_AS_4CHARS(params->fourcc),
++ service->localport);
++ }
++
++ /* Don't unlock the service - leave it with a ref_count of 1. */
++
++ return service;
++}
++
++VCHIQ_STATUS_T
++vchiq_open_service_internal(VCHIQ_SERVICE_T *service, int client_id)
++{
++ struct vchiq_open_payload payload = {
++ service->base.fourcc,
++ client_id,
++ service->version,
++ service->version_min
++ };
++ VCHIQ_ELEMENT_T body = { &payload, sizeof(payload) };
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ service->client_id = client_id;
++ vchiq_use_service_internal(service);
++ status = queue_message(service->state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_OPEN, service->localport, 0),
++ &body, 1, sizeof(payload), 1);
++ if (status == VCHIQ_SUCCESS) {
++ /* Wait for the ACK/NAK */
++ if (down_interruptible(&service->remove_event) != 0) {
++ status = VCHIQ_RETRY;
++ vchiq_release_service_internal(service);
++ } else if ((service->srvstate != VCHIQ_SRVSTATE_OPEN) &&
++ (service->srvstate != VCHIQ_SRVSTATE_OPENSYNC)) {
++ if (service->srvstate != VCHIQ_SRVSTATE_CLOSEWAIT)
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: osi - srvstate = %s (ref %d)",
++ service->state->id,
++ srvstate_names[service->srvstate],
++ service->ref_count);
++ status = VCHIQ_ERROR;
++ VCHIQ_SERVICE_STATS_INC(service, error_count);
++ vchiq_release_service_internal(service);
++ }
++ }
++ return status;
++}
++
++static void
++release_service_messages(VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_STATE_T *state = service->state;
++ int slot_last = state->remote->slot_last;
++ int i;
++
++ /* Release any claimed messages */
++ for (i = state->remote->slot_first; i <= slot_last; i++) {
++ VCHIQ_SLOT_INFO_T *slot_info =
++ SLOT_INFO_FROM_INDEX(state, i);
++ if (slot_info->release_count != slot_info->use_count) {
++ char *data =
++ (char *)SLOT_DATA_FROM_INDEX(state, i);
++ unsigned int pos, end;
++
++ end = VCHIQ_SLOT_SIZE;
++ if (data == state->rx_data)
++ /* This buffer is still being read from - stop
++ ** at the current read position */
++ end = state->rx_pos & VCHIQ_SLOT_MASK;
++
++ pos = 0;
++
++ while (pos < end) {
++ VCHIQ_HEADER_T *header =
++ (VCHIQ_HEADER_T *)(data + pos);
++ int msgid = header->msgid;
++ int port = VCHIQ_MSG_DSTPORT(msgid);
++ if ((port == service->localport) &&
++ (msgid & VCHIQ_MSGID_CLAIMED)) {
++ vchiq_log_info(vchiq_core_log_level,
++ " fsi - hdr %x",
++ (unsigned int)header);
++ release_slot(state, slot_info, header,
++ NULL);
++ }
++ pos += calc_stride(header->size);
++ if (pos > VCHIQ_SLOT_SIZE) {
++ vchiq_log_error(vchiq_core_log_level,
++ "fsi - pos %x: header %x, "
++ "msgid %x, header->msgid %x, "
++ "header->size %x",
++ pos, (unsigned int)header,
++ msgid, header->msgid,
++ header->size);
++ WARN(1, "invalid slot position\n");
++ }
++ }
++ }
++ }
++}
++
++static int
++do_abort_bulks(VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_STATUS_T status;
++
++ /* Abort any outstanding bulk transfers */
++ if (mutex_lock_interruptible(&service->bulk_mutex) != 0)
++ return 0;
++ abort_outstanding_bulks(service, &service->bulk_tx);
++ abort_outstanding_bulks(service, &service->bulk_rx);
++ mutex_unlock(&service->bulk_mutex);
++
++ status = notify_bulks(service, &service->bulk_tx, 0/*!retry_poll*/);
++ if (status == VCHIQ_SUCCESS)
++ status = notify_bulks(service, &service->bulk_rx,
++ 0/*!retry_poll*/);
++ return (status == VCHIQ_SUCCESS);
++}
++
++static VCHIQ_STATUS_T
++close_service_complete(VCHIQ_SERVICE_T *service, int failstate)
++{
++ VCHIQ_STATUS_T status;
++ int is_server = (service->public_fourcc != VCHIQ_FOURCC_INVALID);
++ int newstate;
++
++ switch (service->srvstate) {
++ case VCHIQ_SRVSTATE_OPEN:
++ case VCHIQ_SRVSTATE_CLOSESENT:
++ case VCHIQ_SRVSTATE_CLOSERECVD:
++ if (is_server) {
++ if (service->auto_close) {
++ service->client_id = 0;
++ service->remoteport = VCHIQ_PORT_FREE;
++ newstate = VCHIQ_SRVSTATE_LISTENING;
++ } else
++ newstate = VCHIQ_SRVSTATE_CLOSEWAIT;
++ } else
++ newstate = VCHIQ_SRVSTATE_CLOSED;
++ vchiq_set_service_state(service, newstate);
++ break;
++ case VCHIQ_SRVSTATE_LISTENING:
++ break;
++ default:
++ vchiq_log_error(vchiq_core_log_level,
++ "close_service_complete(%x) called in state %s",
++ service->handle, srvstate_names[service->srvstate]);
++ WARN(1, "close_service_complete in unexpected state\n");
++ return VCHIQ_ERROR;
++ }
++
++ status = make_service_callback(service,
++ VCHIQ_SERVICE_CLOSED, NULL, NULL);
++
++ if (status != VCHIQ_RETRY) {
++ int uc = service->service_use_count;
++ int i;
++ /* Complete the close process */
++ for (i = 0; i < uc; i++)
++ /* cater for cases where close is forced and the
++ ** client may not close all it's handles */
++ vchiq_release_service_internal(service);
++
++ service->client_id = 0;
++ service->remoteport = VCHIQ_PORT_FREE;
++
++ if (service->srvstate == VCHIQ_SRVSTATE_CLOSED)
++ vchiq_free_service_internal(service);
++ else if (service->srvstate != VCHIQ_SRVSTATE_CLOSEWAIT) {
++ if (is_server)
++ service->closing = 0;
++
++ up(&service->remove_event);
++ }
++ } else
++ vchiq_set_service_state(service, failstate);
++
++ return status;
++}
++
++/* Called by the slot handler */
++VCHIQ_STATUS_T
++vchiq_close_service_internal(VCHIQ_SERVICE_T *service, int close_recvd)
++{
++ VCHIQ_STATE_T *state = service->state;
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++ int is_server = (service->public_fourcc != VCHIQ_FOURCC_INVALID);
++
++ vchiq_log_info(vchiq_core_log_level, "%d: csi:%d,%d (%s)",
++ service->state->id, service->localport, close_recvd,
++ srvstate_names[service->srvstate]);
++
++ switch (service->srvstate) {
++ case VCHIQ_SRVSTATE_CLOSED:
++ case VCHIQ_SRVSTATE_HIDDEN:
++ case VCHIQ_SRVSTATE_LISTENING:
++ case VCHIQ_SRVSTATE_CLOSEWAIT:
++ if (close_recvd)
++ vchiq_log_error(vchiq_core_log_level,
++ "vchiq_close_service_internal(1) called "
++ "in state %s",
++ srvstate_names[service->srvstate]);
++ else if (is_server) {
++ if (service->srvstate == VCHIQ_SRVSTATE_LISTENING) {
++ status = VCHIQ_ERROR;
++ } else {
++ service->client_id = 0;
++ service->remoteport = VCHIQ_PORT_FREE;
++ if (service->srvstate ==
++ VCHIQ_SRVSTATE_CLOSEWAIT)
++ vchiq_set_service_state(service,
++ VCHIQ_SRVSTATE_LISTENING);
++ }
++ up(&service->remove_event);
++ } else
++ vchiq_free_service_internal(service);
++ break;
++ case VCHIQ_SRVSTATE_OPENING:
++ if (close_recvd) {
++ /* The open was rejected - tell the user */
++ vchiq_set_service_state(service,
++ VCHIQ_SRVSTATE_CLOSEWAIT);
++ up(&service->remove_event);
++ } else {
++ /* Shutdown mid-open - let the other side know */
++ status = queue_message(state, service,
++ VCHIQ_MAKE_MSG
++ (VCHIQ_MSG_CLOSE,
++ service->localport,
++ VCHIQ_MSG_DSTPORT(service->remoteport)),
++ NULL, 0, 0, 0);
++ }
++ break;
++
++ case VCHIQ_SRVSTATE_OPENSYNC:
++ mutex_lock(&state->sync_mutex);
++ /* Drop through */
++
++ case VCHIQ_SRVSTATE_OPEN:
++ if (state->is_master || close_recvd) {
++ if (!do_abort_bulks(service))
++ status = VCHIQ_RETRY;
++ }
++
++ release_service_messages(service);
++
++ if (status == VCHIQ_SUCCESS)
++ status = queue_message(state, service,
++ VCHIQ_MAKE_MSG
++ (VCHIQ_MSG_CLOSE,
++ service->localport,
++ VCHIQ_MSG_DSTPORT(service->remoteport)),
++ NULL, 0, 0, 0);
++
++ if (status == VCHIQ_SUCCESS) {
++ if (!close_recvd)
++ break;
++ } else if (service->srvstate == VCHIQ_SRVSTATE_OPENSYNC) {
++ mutex_unlock(&state->sync_mutex);
++ break;
++ } else
++ break;
++
++ status = close_service_complete(service,
++ VCHIQ_SRVSTATE_CLOSERECVD);
++ break;
++
++ case VCHIQ_SRVSTATE_CLOSESENT:
++ if (!close_recvd)
++ /* This happens when a process is killed mid-close */
++ break;
++
++ if (!state->is_master) {
++ if (!do_abort_bulks(service)) {
++ status = VCHIQ_RETRY;
++ break;
++ }
++ }
++
++ if (status == VCHIQ_SUCCESS)
++ status = close_service_complete(service,
++ VCHIQ_SRVSTATE_CLOSERECVD);
++ break;
++
++ case VCHIQ_SRVSTATE_CLOSERECVD:
++ if (!close_recvd && is_server)
++ /* Force into LISTENING mode */
++ vchiq_set_service_state(service,
++ VCHIQ_SRVSTATE_LISTENING);
++ status = close_service_complete(service,
++ VCHIQ_SRVSTATE_CLOSERECVD);
++ break;
++
++ default:
++ vchiq_log_error(vchiq_core_log_level,
++ "vchiq_close_service_internal(%d) called in state %s",
++ close_recvd, srvstate_names[service->srvstate]);
++ break;
++ }
++
++ return status;
++}
++
++/* Called from the application process upon process death */
++void
++vchiq_terminate_service_internal(VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_STATE_T *state = service->state;
++
++ vchiq_log_info(vchiq_core_log_level, "%d: tsi - (%d<->%d)",
++ state->id, service->localport, service->remoteport);
++
++ mark_service_closing(service);
++
++ /* Mark the service for removal by the slot handler */
++ request_poll(state, service, VCHIQ_POLL_REMOVE);
++}
++
++/* Called from the slot handler */
++void
++vchiq_free_service_internal(VCHIQ_SERVICE_T *service)
++{
++ VCHIQ_STATE_T *state = service->state;
++
++ vchiq_log_info(vchiq_core_log_level, "%d: fsi - (%d)",
++ state->id, service->localport);
++
++ switch (service->srvstate) {
++ case VCHIQ_SRVSTATE_OPENING:
++ case VCHIQ_SRVSTATE_CLOSED:
++ case VCHIQ_SRVSTATE_HIDDEN:
++ case VCHIQ_SRVSTATE_LISTENING:
++ case VCHIQ_SRVSTATE_CLOSEWAIT:
++ break;
++ default:
++ vchiq_log_error(vchiq_core_log_level,
++ "%d: fsi - (%d) in state %s",
++ state->id, service->localport,
++ srvstate_names[service->srvstate]);
++ return;
++ }
++
++ vchiq_set_service_state(service, VCHIQ_SRVSTATE_FREE);
++
++ up(&service->remove_event);
++
++ /* Release the initial lock */
++ unlock_service(service);
++}
++
++VCHIQ_STATUS_T
++vchiq_connect_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance)
++{
++ VCHIQ_SERVICE_T *service;
++ int i;
++
++ /* Find all services registered to this client and enable them. */
++ i = 0;
++ while ((service = next_service_by_instance(state, instance,
++ &i)) != NULL) {
++ if (service->srvstate == VCHIQ_SRVSTATE_HIDDEN)
++ vchiq_set_service_state(service,
++ VCHIQ_SRVSTATE_LISTENING);
++ unlock_service(service);
++ }
++
++ if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED) {
++ if (queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_CONNECT, 0, 0), NULL, 0,
++ 0, 1) == VCHIQ_RETRY)
++ return VCHIQ_RETRY;
++
++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTING);
++ }
++
++ if (state->conn_state == VCHIQ_CONNSTATE_CONNECTING) {
++ if (down_interruptible(&state->connect) != 0)
++ return VCHIQ_RETRY;
++
++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED);
++ up(&state->connect);
++ }
++
++ return VCHIQ_SUCCESS;
++}
++
++VCHIQ_STATUS_T
++vchiq_shutdown_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance)
++{
++ VCHIQ_SERVICE_T *service;
++ int i;
++
++ /* Find all services registered to this client and enable them. */
++ i = 0;
++ while ((service = next_service_by_instance(state, instance,
++ &i)) != NULL) {
++ (void)vchiq_remove_service(service->handle);
++ unlock_service(service);
++ }
++
++ return VCHIQ_SUCCESS;
++}
++
++VCHIQ_STATUS_T
++vchiq_pause_internal(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ switch (state->conn_state) {
++ case VCHIQ_CONNSTATE_CONNECTED:
++ /* Request a pause */
++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_PAUSING);
++ request_poll(state, NULL, 0);
++ break;
++ default:
++ vchiq_log_error(vchiq_core_log_level,
++ "vchiq_pause_internal in state %s\n",
++ conn_state_names[state->conn_state]);
++ status = VCHIQ_ERROR;
++ VCHIQ_STATS_INC(state, error_count);
++ break;
++ }
++
++ return status;
++}
++
++VCHIQ_STATUS_T
++vchiq_resume_internal(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ if (state->conn_state == VCHIQ_CONNSTATE_PAUSED) {
++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_RESUMING);
++ request_poll(state, NULL, 0);
++ } else {
++ status = VCHIQ_ERROR;
++ VCHIQ_STATS_INC(state, error_count);
++ }
++
++ return status;
++}
++
++VCHIQ_STATUS_T
++vchiq_close_service(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ /* Unregister the service */
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ if (!service)
++ return VCHIQ_ERROR;
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: close_service:%d",
++ service->state->id, service->localport);
++
++ if ((service->srvstate == VCHIQ_SRVSTATE_FREE) ||
++ (service->srvstate == VCHIQ_SRVSTATE_LISTENING) ||
++ (service->srvstate == VCHIQ_SRVSTATE_HIDDEN)) {
++ unlock_service(service);
++ return VCHIQ_ERROR;
++ }
++
++ mark_service_closing(service);
++
++ if (current == service->state->slot_handler_thread) {
++ status = vchiq_close_service_internal(service,
++ 0/*!close_recvd*/);
++ BUG_ON(status == VCHIQ_RETRY);
++ } else {
++ /* Mark the service for termination by the slot handler */
++ request_poll(service->state, service, VCHIQ_POLL_TERMINATE);
++ }
++
++ while (1) {
++ if (down_interruptible(&service->remove_event) != 0) {
++ status = VCHIQ_RETRY;
++ break;
++ }
++
++ if ((service->srvstate == VCHIQ_SRVSTATE_FREE) ||
++ (service->srvstate == VCHIQ_SRVSTATE_LISTENING) ||
++ (service->srvstate == VCHIQ_SRVSTATE_OPEN))
++ break;
++
++ vchiq_log_warning(vchiq_core_log_level,
++ "%d: close_service:%d - waiting in state %s",
++ service->state->id, service->localport,
++ srvstate_names[service->srvstate]);
++ }
++
++ if ((status == VCHIQ_SUCCESS) &&
++ (service->srvstate != VCHIQ_SRVSTATE_FREE) &&
++ (service->srvstate != VCHIQ_SRVSTATE_LISTENING))
++ status = VCHIQ_ERROR;
++
++ unlock_service(service);
++
++ return status;
++}
++
++VCHIQ_STATUS_T
++vchiq_remove_service(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ /* Unregister the service */
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS;
++
++ if (!service)
++ return VCHIQ_ERROR;
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: remove_service:%d",
++ service->state->id, service->localport);
++
++ if (service->srvstate == VCHIQ_SRVSTATE_FREE) {
++ unlock_service(service);
++ return VCHIQ_ERROR;
++ }
++
++ mark_service_closing(service);
++
++ if ((service->srvstate == VCHIQ_SRVSTATE_HIDDEN) ||
++ (current == service->state->slot_handler_thread)) {
++ /* Make it look like a client, because it must be removed and
++ not left in the LISTENING state. */
++ service->public_fourcc = VCHIQ_FOURCC_INVALID;
++
++ status = vchiq_close_service_internal(service,
++ 0/*!close_recvd*/);
++ BUG_ON(status == VCHIQ_RETRY);
++ } else {
++ /* Mark the service for removal by the slot handler */
++ request_poll(service->state, service, VCHIQ_POLL_REMOVE);
++ }
++ while (1) {
++ if (down_interruptible(&service->remove_event) != 0) {
++ status = VCHIQ_RETRY;
++ break;
++ }
++
++ if ((service->srvstate == VCHIQ_SRVSTATE_FREE) ||
++ (service->srvstate == VCHIQ_SRVSTATE_OPEN))
++ break;
++
++ vchiq_log_warning(vchiq_core_log_level,
++ "%d: remove_service:%d - waiting in state %s",
++ service->state->id, service->localport,
++ srvstate_names[service->srvstate]);
++ }
++
++ if ((status == VCHIQ_SUCCESS) &&
++ (service->srvstate != VCHIQ_SRVSTATE_FREE))
++ status = VCHIQ_ERROR;
++
++ unlock_service(service);
++
++ return status;
++}
++
++
++/* This function may be called by kernel threads or user threads.
++ * User threads may receive VCHIQ_RETRY to indicate that a signal has been
++ * received and the call should be retried after being returned to user
++ * context.
++ * When called in blocking mode, the userdata field points to a bulk_waiter
++ * structure.
++ */
++VCHIQ_STATUS_T
++vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle,
++ VCHI_MEM_HANDLE_T memhandle, void *offset, int size, void *userdata,
++ VCHIQ_BULK_MODE_T mode, VCHIQ_BULK_DIR_T dir)
++{
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ VCHIQ_BULK_QUEUE_T *queue;
++ VCHIQ_BULK_T *bulk;
++ VCHIQ_STATE_T *state;
++ struct bulk_waiter *bulk_waiter = NULL;
++ const char dir_char = (dir == VCHIQ_BULK_TRANSMIT) ? 't' : 'r';
++ const int dir_msgtype = (dir == VCHIQ_BULK_TRANSMIT) ?
++ VCHIQ_MSG_BULK_TX : VCHIQ_MSG_BULK_RX;
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++
++ if (!service ||
++ (service->srvstate != VCHIQ_SRVSTATE_OPEN) ||
++ ((memhandle == VCHI_MEM_HANDLE_INVALID) && (offset == NULL)) ||
++ (vchiq_check_service(service) != VCHIQ_SUCCESS))
++ goto error_exit;
++
++ switch (mode) {
++ case VCHIQ_BULK_MODE_NOCALLBACK:
++ case VCHIQ_BULK_MODE_CALLBACK:
++ break;
++ case VCHIQ_BULK_MODE_BLOCKING:
++ bulk_waiter = (struct bulk_waiter *)userdata;
++ sema_init(&bulk_waiter->event, 0);
++ bulk_waiter->actual = 0;
++ bulk_waiter->bulk = NULL;
++ break;
++ case VCHIQ_BULK_MODE_WAITING:
++ bulk_waiter = (struct bulk_waiter *)userdata;
++ bulk = bulk_waiter->bulk;
++ goto waiting;
++ default:
++ goto error_exit;
++ }
++
++ state = service->state;
++
++ queue = (dir == VCHIQ_BULK_TRANSMIT) ?
++ &service->bulk_tx : &service->bulk_rx;
++
++ if (mutex_lock_interruptible(&service->bulk_mutex) != 0) {
++ status = VCHIQ_RETRY;
++ goto error_exit;
++ }
++
++ if (queue->local_insert == queue->remove + VCHIQ_NUM_SERVICE_BULKS) {
++ VCHIQ_SERVICE_STATS_INC(service, bulk_stalls);
++ do {
++ mutex_unlock(&service->bulk_mutex);
++ if (down_interruptible(&service->bulk_remove_event)
++ != 0) {
++ status = VCHIQ_RETRY;
++ goto error_exit;
++ }
++ if (mutex_lock_interruptible(&service->bulk_mutex)
++ != 0) {
++ status = VCHIQ_RETRY;
++ goto error_exit;
++ }
++ } while (queue->local_insert == queue->remove +
++ VCHIQ_NUM_SERVICE_BULKS);
++ }
++
++ bulk = &queue->bulks[BULK_INDEX(queue->local_insert)];
++
++ bulk->mode = mode;
++ bulk->dir = dir;
++ bulk->userdata = userdata;
++ bulk->size = size;
++ bulk->actual = VCHIQ_BULK_ACTUAL_ABORTED;
++
++ if (vchiq_prepare_bulk_data(bulk, memhandle, offset, size, dir) !=
++ VCHIQ_SUCCESS)
++ goto unlock_error_exit;
++
++ wmb();
++
++ vchiq_log_info(vchiq_core_log_level,
++ "%d: bt (%d->%d) %cx %x@%x %x",
++ state->id,
++ service->localport, service->remoteport, dir_char,
++ size, (unsigned int)bulk->data, (unsigned int)userdata);
++
++ if (state->is_master) {
++ queue->local_insert++;
++ if (resolve_bulks(service, queue))
++ request_poll(state, service,
++ (dir == VCHIQ_BULK_TRANSMIT) ?
++ VCHIQ_POLL_TXNOTIFY : VCHIQ_POLL_RXNOTIFY);
++ } else {
++ int payload[2] = { (int)bulk->data, bulk->size };
++ VCHIQ_ELEMENT_T element = { payload, sizeof(payload) };
++
++ status = queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(dir_msgtype,
++ service->localport, service->remoteport),
++ &element, 1, sizeof(payload), 1);
++ if (status != VCHIQ_SUCCESS) {
++ vchiq_complete_bulk(bulk);
++ goto unlock_error_exit;
++ }
++ queue->local_insert++;
++ }
++
++ mutex_unlock(&service->bulk_mutex);
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%d: bt:%d %cx li=%x ri=%x p=%x",
++ state->id,
++ service->localport, dir_char,
++ queue->local_insert, queue->remote_insert, queue->process);
++
++waiting:
++ unlock_service(service);
++
++ status = VCHIQ_SUCCESS;
++
++ if (bulk_waiter) {
++ bulk_waiter->bulk = bulk;
++ if (down_interruptible(&bulk_waiter->event) != 0)
++ status = VCHIQ_RETRY;
++ else if (bulk_waiter->actual == VCHIQ_BULK_ACTUAL_ABORTED)
++ status = VCHIQ_ERROR;
++ }
++
++ return status;
++
++unlock_error_exit:
++ mutex_unlock(&service->bulk_mutex);
++
++error_exit:
++ if (service)
++ unlock_service(service);
++ return status;
++}
++
++VCHIQ_STATUS_T
++vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T handle,
++ const VCHIQ_ELEMENT_T *elements, unsigned int count)
++{
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++
++ unsigned int size = 0;
++ unsigned int i;
++
++ if (!service ||
++ (vchiq_check_service(service) != VCHIQ_SUCCESS))
++ goto error_exit;
++
++ for (i = 0; i < (unsigned int)count; i++) {
++ if (elements[i].size) {
++ if (elements[i].data == NULL) {
++ VCHIQ_SERVICE_STATS_INC(service, error_count);
++ goto error_exit;
++ }
++ size += elements[i].size;
++ }
++ }
++
++ if (size > VCHIQ_MAX_MSG_SIZE) {
++ VCHIQ_SERVICE_STATS_INC(service, error_count);
++ goto error_exit;
++ }
++
++ switch (service->srvstate) {
++ case VCHIQ_SRVSTATE_OPEN:
++ status = queue_message(service->state, service,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_DATA,
++ service->localport,
++ service->remoteport),
++ elements, count, size, 1);
++ break;
++ case VCHIQ_SRVSTATE_OPENSYNC:
++ status = queue_message_sync(service->state, service,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_DATA,
++ service->localport,
++ service->remoteport),
++ elements, count, size, 1);
++ break;
++ default:
++ status = VCHIQ_ERROR;
++ break;
++ }
++
++error_exit:
++ if (service)
++ unlock_service(service);
++
++ return status;
++}
++
++void
++vchiq_release_message(VCHIQ_SERVICE_HANDLE_T handle, VCHIQ_HEADER_T *header)
++{
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ VCHIQ_SHARED_STATE_T *remote;
++ VCHIQ_STATE_T *state;
++ int slot_index;
++
++ if (!service)
++ return;
++
++ state = service->state;
++ remote = state->remote;
++
++ slot_index = SLOT_INDEX_FROM_DATA(state, (void *)header);
++
++ if ((slot_index >= remote->slot_first) &&
++ (slot_index <= remote->slot_last)) {
++ int msgid = header->msgid;
++ if (msgid & VCHIQ_MSGID_CLAIMED) {
++ VCHIQ_SLOT_INFO_T *slot_info =
++ SLOT_INFO_FROM_INDEX(state, slot_index);
++
++ release_slot(state, slot_info, header, service);
++ }
++ } else if (slot_index == remote->slot_sync)
++ release_message_sync(state, header);
++
++ unlock_service(service);
++}
++
++static void
++release_message_sync(VCHIQ_STATE_T *state, VCHIQ_HEADER_T *header)
++{
++ header->msgid = VCHIQ_MSGID_PADDING;
++ wmb();
++ remote_event_signal(&state->remote->sync_release);
++}
++
++VCHIQ_STATUS_T
++vchiq_get_peer_version(VCHIQ_SERVICE_HANDLE_T handle, short *peer_version)
++{
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++
++ if (!service ||
++ (vchiq_check_service(service) != VCHIQ_SUCCESS) ||
++ !peer_version)
++ goto exit;
++ *peer_version = service->peer_version;
++ status = VCHIQ_SUCCESS;
++
++exit:
++ if (service)
++ unlock_service(service);
++ return status;
++}
++
++VCHIQ_STATUS_T
++vchiq_get_config(VCHIQ_INSTANCE_T instance,
++ int config_size, VCHIQ_CONFIG_T *pconfig)
++{
++ VCHIQ_CONFIG_T config;
++
++ (void)instance;
++
++ config.max_msg_size = VCHIQ_MAX_MSG_SIZE;
++ config.bulk_threshold = VCHIQ_MAX_MSG_SIZE;
++ config.max_outstanding_bulks = VCHIQ_NUM_SERVICE_BULKS;
++ config.max_services = VCHIQ_MAX_SERVICES;
++ config.version = VCHIQ_VERSION;
++ config.version_min = VCHIQ_VERSION_MIN;
++
++ if (config_size > sizeof(VCHIQ_CONFIG_T))
++ return VCHIQ_ERROR;
++
++ memcpy(pconfig, &config,
++ min(config_size, (int)(sizeof(VCHIQ_CONFIG_T))));
++
++ return VCHIQ_SUCCESS;
++}
++
++VCHIQ_STATUS_T
++vchiq_set_service_option(VCHIQ_SERVICE_HANDLE_T handle,
++ VCHIQ_SERVICE_OPTION_T option, int value)
++{
++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle);
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++
++ if (service) {
++ switch (option) {
++ case VCHIQ_SERVICE_OPTION_AUTOCLOSE:
++ service->auto_close = value;
++ status = VCHIQ_SUCCESS;
++ break;
++
++ case VCHIQ_SERVICE_OPTION_SLOT_QUOTA: {
++ VCHIQ_SERVICE_QUOTA_T *service_quota =
++ &service->state->service_quotas[
++ service->localport];
++ if (value == 0)
++ value = service->state->default_slot_quota;
++ if ((value >= service_quota->slot_use_count) &&
++ (value < (unsigned short)~0)) {
++ service_quota->slot_quota = value;
++ if ((value >= service_quota->slot_use_count) &&
++ (service_quota->message_quota >=
++ service_quota->message_use_count)) {
++ /* Signal the service that it may have
++ ** dropped below its quota */
++ up(&service_quota->quota_event);
++ }
++ status = VCHIQ_SUCCESS;
++ }
++ } break;
++
++ case VCHIQ_SERVICE_OPTION_MESSAGE_QUOTA: {
++ VCHIQ_SERVICE_QUOTA_T *service_quota =
++ &service->state->service_quotas[
++ service->localport];
++ if (value == 0)
++ value = service->state->default_message_quota;
++ if ((value >= service_quota->message_use_count) &&
++ (value < (unsigned short)~0)) {
++ service_quota->message_quota = value;
++ if ((value >=
++ service_quota->message_use_count) &&
++ (service_quota->slot_quota >=
++ service_quota->slot_use_count))
++ /* Signal the service that it may have
++ ** dropped below its quota */
++ up(&service_quota->quota_event);
++ status = VCHIQ_SUCCESS;
++ }
++ } break;
++
++ case VCHIQ_SERVICE_OPTION_SYNCHRONOUS:
++ if ((service->srvstate == VCHIQ_SRVSTATE_HIDDEN) ||
++ (service->srvstate ==
++ VCHIQ_SRVSTATE_LISTENING)) {
++ service->sync = value;
++ status = VCHIQ_SUCCESS;
++ }
++ break;
++
++ case VCHIQ_SERVICE_OPTION_TRACE:
++ service->trace = value;
++ status = VCHIQ_SUCCESS;
++ break;
++
++ default:
++ break;
++ }
++ unlock_service(service);
++ }
++
++ return status;
++}
++
++void
++vchiq_dump_shared_state(void *dump_context, VCHIQ_STATE_T *state,
++ VCHIQ_SHARED_STATE_T *shared, const char *label)
++{
++ static const char *const debug_names[] = {
++ "<entries>",
++ "SLOT_HANDLER_COUNT",
++ "SLOT_HANDLER_LINE",
++ "PARSE_LINE",
++ "PARSE_HEADER",
++ "PARSE_MSGID",
++ "AWAIT_COMPLETION_LINE",
++ "DEQUEUE_MESSAGE_LINE",
++ "SERVICE_CALLBACK_LINE",
++ "MSG_QUEUE_FULL_COUNT",
++ "COMPLETION_QUEUE_FULL_COUNT"
++ };
++ int i;
++
++ char buf[80];
++ int len;
++ len = snprintf(buf, sizeof(buf),
++ " %s: slots %d-%d tx_pos=%x recycle=%x",
++ label, shared->slot_first, shared->slot_last,
++ shared->tx_pos, shared->slot_queue_recycle);
++ vchiq_dump(dump_context, buf, len + 1);
++
++ len = snprintf(buf, sizeof(buf),
++ " Slots claimed:");
++ vchiq_dump(dump_context, buf, len + 1);
++
++ for (i = shared->slot_first; i <= shared->slot_last; i++) {
++ VCHIQ_SLOT_INFO_T slot_info = *SLOT_INFO_FROM_INDEX(state, i);
++ if (slot_info.use_count != slot_info.release_count) {
++ len = snprintf(buf, sizeof(buf),
++ " %d: %d/%d", i, slot_info.use_count,
++ slot_info.release_count);
++ vchiq_dump(dump_context, buf, len + 1);
++ }
++ }
++
++ for (i = 1; i < shared->debug[DEBUG_ENTRIES]; i++) {
++ len = snprintf(buf, sizeof(buf), " DEBUG: %s = %d(%x)",
++ debug_names[i], shared->debug[i], shared->debug[i]);
++ vchiq_dump(dump_context, buf, len + 1);
++ }
++}
++
++void
++vchiq_dump_state(void *dump_context, VCHIQ_STATE_T *state)
++{
++ char buf[80];
++ int len;
++ int i;
++
++ len = snprintf(buf, sizeof(buf), "State %d: %s", state->id,
++ conn_state_names[state->conn_state]);
++ vchiq_dump(dump_context, buf, len + 1);
++
++ len = snprintf(buf, sizeof(buf),
++ " tx_pos=%x(@%x), rx_pos=%x(@%x)",
++ state->local->tx_pos,
++ (uint32_t)state->tx_data +
++ (state->local_tx_pos & VCHIQ_SLOT_MASK),
++ state->rx_pos,
++ (uint32_t)state->rx_data +
++ (state->rx_pos & VCHIQ_SLOT_MASK));
++ vchiq_dump(dump_context, buf, len + 1);
++
++ len = snprintf(buf, sizeof(buf),
++ " Version: %d (min %d)",
++ VCHIQ_VERSION, VCHIQ_VERSION_MIN);
++ vchiq_dump(dump_context, buf, len + 1);
++
++ if (VCHIQ_ENABLE_STATS) {
++ len = snprintf(buf, sizeof(buf),
++ " Stats: ctrl_tx_count=%d, ctrl_rx_count=%d, "
++ "error_count=%d",
++ state->stats.ctrl_tx_count, state->stats.ctrl_rx_count,
++ state->stats.error_count);
++ vchiq_dump(dump_context, buf, len + 1);
++ }
++
++ len = snprintf(buf, sizeof(buf),
++ " Slots: %d available (%d data), %d recyclable, %d stalls "
++ "(%d data)",
++ ((state->slot_queue_available * VCHIQ_SLOT_SIZE) -
++ state->local_tx_pos) / VCHIQ_SLOT_SIZE,
++ state->data_quota - state->data_use_count,
++ state->local->slot_queue_recycle - state->slot_queue_available,
++ state->stats.slot_stalls, state->stats.data_stalls);
++ vchiq_dump(dump_context, buf, len + 1);
++
++ vchiq_dump_platform_state(dump_context);
++
++ vchiq_dump_shared_state(dump_context, state, state->local, "Local");
++ vchiq_dump_shared_state(dump_context, state, state->remote, "Remote");
++
++ vchiq_dump_platform_instances(dump_context);
++
++ for (i = 0; i < state->unused_service; i++) {
++ VCHIQ_SERVICE_T *service = find_service_by_port(state, i);
++
++ if (service) {
++ vchiq_dump_service_state(dump_context, service);
++ unlock_service(service);
++ }
++ }
++}
++
++void
++vchiq_dump_service_state(void *dump_context, VCHIQ_SERVICE_T *service)
++{
++ char buf[80];
++ int len;
++
++ len = snprintf(buf, sizeof(buf), "Service %d: %s (ref %u)",
++ service->localport, srvstate_names[service->srvstate],
++ service->ref_count - 1); /*Don't include the lock just taken*/
++
++ if (service->srvstate != VCHIQ_SRVSTATE_FREE) {
++ char remoteport[30];
++ VCHIQ_SERVICE_QUOTA_T *service_quota =
++ &service->state->service_quotas[service->localport];
++ int fourcc = service->base.fourcc;
++ int tx_pending, rx_pending;
++ if (service->remoteport != VCHIQ_PORT_FREE) {
++ int len2 = snprintf(remoteport, sizeof(remoteport),
++ "%d", service->remoteport);
++ if (service->public_fourcc != VCHIQ_FOURCC_INVALID)
++ snprintf(remoteport + len2,
++ sizeof(remoteport) - len2,
++ " (client %x)", service->client_id);
++ } else
++ strcpy(remoteport, "n/a");
++
++ len += snprintf(buf + len, sizeof(buf) - len,
++ " '%c%c%c%c' remote %s (msg use %d/%d, slot use %d/%d)",
++ VCHIQ_FOURCC_AS_4CHARS(fourcc),
++ remoteport,
++ service_quota->message_use_count,
++ service_quota->message_quota,
++ service_quota->slot_use_count,
++ service_quota->slot_quota);
++
++ vchiq_dump(dump_context, buf, len + 1);
++
++ tx_pending = service->bulk_tx.local_insert -
++ service->bulk_tx.remote_insert;
++
++ rx_pending = service->bulk_rx.local_insert -
++ service->bulk_rx.remote_insert;
++
++ len = snprintf(buf, sizeof(buf),
++ " Bulk: tx_pending=%d (size %d),"
++ " rx_pending=%d (size %d)",
++ tx_pending,
++ tx_pending ? service->bulk_tx.bulks[
++ BULK_INDEX(service->bulk_tx.remove)].size : 0,
++ rx_pending,
++ rx_pending ? service->bulk_rx.bulks[
++ BULK_INDEX(service->bulk_rx.remove)].size : 0);
++
++ if (VCHIQ_ENABLE_STATS) {
++ vchiq_dump(dump_context, buf, len + 1);
++
++ len = snprintf(buf, sizeof(buf),
++ " Ctrl: tx_count=%d, tx_bytes=%llu, "
++ "rx_count=%d, rx_bytes=%llu",
++ service->stats.ctrl_tx_count,
++ service->stats.ctrl_tx_bytes,
++ service->stats.ctrl_rx_count,
++ service->stats.ctrl_rx_bytes);
++ vchiq_dump(dump_context, buf, len + 1);
++
++ len = snprintf(buf, sizeof(buf),
++ " Bulk: tx_count=%d, tx_bytes=%llu, "
++ "rx_count=%d, rx_bytes=%llu",
++ service->stats.bulk_tx_count,
++ service->stats.bulk_tx_bytes,
++ service->stats.bulk_rx_count,
++ service->stats.bulk_rx_bytes);
++ vchiq_dump(dump_context, buf, len + 1);
++
++ len = snprintf(buf, sizeof(buf),
++ " %d quota stalls, %d slot stalls, "
++ "%d bulk stalls, %d aborted, %d errors",
++ service->stats.quota_stalls,
++ service->stats.slot_stalls,
++ service->stats.bulk_stalls,
++ service->stats.bulk_aborted_count,
++ service->stats.error_count);
++ }
++ }
++
++ vchiq_dump(dump_context, buf, len + 1);
++
++ if (service->srvstate != VCHIQ_SRVSTATE_FREE)
++ vchiq_dump_platform_service_state(dump_context, service);
++}
++
++
++void
++vchiq_loud_error_header(void)
++{
++ vchiq_log_error(vchiq_core_log_level,
++ "============================================================"
++ "================");
++ vchiq_log_error(vchiq_core_log_level,
++ "============================================================"
++ "================");
++ vchiq_log_error(vchiq_core_log_level, "=====");
++}
++
++void
++vchiq_loud_error_footer(void)
++{
++ vchiq_log_error(vchiq_core_log_level, "=====");
++ vchiq_log_error(vchiq_core_log_level,
++ "============================================================"
++ "================");
++ vchiq_log_error(vchiq_core_log_level,
++ "============================================================"
++ "================");
++}
++
++
++VCHIQ_STATUS_T vchiq_send_remote_use(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_RETRY;
++ if (state->conn_state != VCHIQ_CONNSTATE_DISCONNECTED)
++ status = queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_REMOTE_USE, 0, 0),
++ NULL, 0, 0, 0);
++ return status;
++}
++
++VCHIQ_STATUS_T vchiq_send_remote_release(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_RETRY;
++ if (state->conn_state != VCHIQ_CONNSTATE_DISCONNECTED)
++ status = queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_REMOTE_RELEASE, 0, 0),
++ NULL, 0, 0, 0);
++ return status;
++}
++
++VCHIQ_STATUS_T vchiq_send_remote_use_active(VCHIQ_STATE_T *state)
++{
++ VCHIQ_STATUS_T status = VCHIQ_RETRY;
++ if (state->conn_state != VCHIQ_CONNSTATE_DISCONNECTED)
++ status = queue_message(state, NULL,
++ VCHIQ_MAKE_MSG(VCHIQ_MSG_REMOTE_USE_ACTIVE, 0, 0),
++ NULL, 0, 0, 0);
++ return status;
++}
++
++void vchiq_log_dump_mem(const char *label, uint32_t addr, const void *voidMem,
++ size_t numBytes)
++{
++ const uint8_t *mem = (const uint8_t *)voidMem;
++ size_t offset;
++ char lineBuf[100];
++ char *s;
++
++ while (numBytes > 0) {
++ s = lineBuf;
++
++ for (offset = 0; offset < 16; offset++) {
++ if (offset < numBytes)
++ s += snprintf(s, 4, "%02x ", mem[offset]);
++ else
++ s += snprintf(s, 4, " ");
++ }
++
++ for (offset = 0; offset < 16; offset++) {
++ if (offset < numBytes) {
++ uint8_t ch = mem[offset];
++
++ if ((ch < ' ') || (ch > '~'))
++ ch = '.';
++ *s++ = (char)ch;
++ }
++ }
++ *s++ = '\0';
++
++ if ((label != NULL) && (*label != '\0'))
++ vchiq_log_trace(VCHIQ_LOG_TRACE,
++ "%s: %08x: %s", label, addr, lineBuf);
++ else
++ vchiq_log_trace(VCHIQ_LOG_TRACE,
++ "%08x: %s", addr, lineBuf);
++
++ addr += 16;
++ mem += 16;
++ if (numBytes > 16)
++ numBytes -= 16;
++ else
++ numBytes = 0;
++ }
++}
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.h
+new file mode 100644
+index 0000000..1b27917
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.h
+@@ -0,0 +1,711 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_CORE_H
++#define VCHIQ_CORE_H
++
++#include <linux/mutex.h>
++#include <linux/semaphore.h>
++#include <linux/kthread.h>
++
++#include "vchiq_cfg.h"
++
++#include "vchiq.h"
++
++/* Run time control of log level, based on KERN_XXX level. */
++#define VCHIQ_LOG_DEFAULT 4
++#define VCHIQ_LOG_ERROR 3
++#define VCHIQ_LOG_WARNING 4
++#define VCHIQ_LOG_INFO 6
++#define VCHIQ_LOG_TRACE 7
++
++#define VCHIQ_LOG_PREFIX KERN_INFO "vchiq: "
++
++#ifndef vchiq_log_error
++#define vchiq_log_error(cat, fmt, ...) \
++ do { if (cat >= VCHIQ_LOG_ERROR) \
++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0)
++#endif
++#ifndef vchiq_log_warning
++#define vchiq_log_warning(cat, fmt, ...) \
++ do { if (cat >= VCHIQ_LOG_WARNING) \
++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0)
++#endif
++#ifndef vchiq_log_info
++#define vchiq_log_info(cat, fmt, ...) \
++ do { if (cat >= VCHIQ_LOG_INFO) \
++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0)
++#endif
++#ifndef vchiq_log_trace
++#define vchiq_log_trace(cat, fmt, ...) \
++ do { if (cat >= VCHIQ_LOG_TRACE) \
++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0)
++#endif
++
++#define vchiq_loud_error(...) \
++ vchiq_log_error(vchiq_core_log_level, "===== " __VA_ARGS__)
++
++#ifndef vchiq_static_assert
++#define vchiq_static_assert(cond) __attribute__((unused)) \
++ extern int vchiq_static_assert[(cond) ? 1 : -1]
++#endif
++
++#define IS_POW2(x) (x && ((x & (x - 1)) == 0))
++
++/* Ensure that the slot size and maximum number of slots are powers of 2 */
++vchiq_static_assert(IS_POW2(VCHIQ_SLOT_SIZE));
++vchiq_static_assert(IS_POW2(VCHIQ_MAX_SLOTS));
++vchiq_static_assert(IS_POW2(VCHIQ_MAX_SLOTS_PER_SIDE));
++
++#define VCHIQ_SLOT_MASK (VCHIQ_SLOT_SIZE - 1)
++#define VCHIQ_SLOT_QUEUE_MASK (VCHIQ_MAX_SLOTS_PER_SIDE - 1)
++#define VCHIQ_SLOT_ZERO_SLOTS ((sizeof(VCHIQ_SLOT_ZERO_T) + \
++ VCHIQ_SLOT_SIZE - 1) / VCHIQ_SLOT_SIZE)
++
++#define VCHIQ_MSG_PADDING 0 /* - */
++#define VCHIQ_MSG_CONNECT 1 /* - */
++#define VCHIQ_MSG_OPEN 2 /* + (srcport, -), fourcc, client_id */
++#define VCHIQ_MSG_OPENACK 3 /* + (srcport, dstport) */
++#define VCHIQ_MSG_CLOSE 4 /* + (srcport, dstport) */
++#define VCHIQ_MSG_DATA 5 /* + (srcport, dstport) */
++#define VCHIQ_MSG_BULK_RX 6 /* + (srcport, dstport), data, size */
++#define VCHIQ_MSG_BULK_TX 7 /* + (srcport, dstport), data, size */
++#define VCHIQ_MSG_BULK_RX_DONE 8 /* + (srcport, dstport), actual */
++#define VCHIQ_MSG_BULK_TX_DONE 9 /* + (srcport, dstport), actual */
++#define VCHIQ_MSG_PAUSE 10 /* - */
++#define VCHIQ_MSG_RESUME 11 /* - */
++#define VCHIQ_MSG_REMOTE_USE 12 /* - */
++#define VCHIQ_MSG_REMOTE_RELEASE 13 /* - */
++#define VCHIQ_MSG_REMOTE_USE_ACTIVE 14 /* - */
++
++#define VCHIQ_PORT_MAX (VCHIQ_MAX_SERVICES - 1)
++#define VCHIQ_PORT_FREE 0x1000
++#define VCHIQ_PORT_IS_VALID(port) (port < VCHIQ_PORT_FREE)
++#define VCHIQ_MAKE_MSG(type, srcport, dstport) \
++ ((type<<24) | (srcport<<12) | (dstport<<0))
++#define VCHIQ_MSG_TYPE(msgid) ((unsigned int)msgid >> 24)
++#define VCHIQ_MSG_SRCPORT(msgid) \
++ (unsigned short)(((unsigned int)msgid >> 12) & 0xfff)
++#define VCHIQ_MSG_DSTPORT(msgid) \
++ ((unsigned short)msgid & 0xfff)
++
++#define VCHIQ_FOURCC_AS_4CHARS(fourcc) \
++ ((fourcc) >> 24) & 0xff, \
++ ((fourcc) >> 16) & 0xff, \
++ ((fourcc) >> 8) & 0xff, \
++ (fourcc) & 0xff
++
++/* Ensure the fields are wide enough */
++vchiq_static_assert(VCHIQ_MSG_SRCPORT(VCHIQ_MAKE_MSG(0, 0, VCHIQ_PORT_MAX))
++ == 0);
++vchiq_static_assert(VCHIQ_MSG_TYPE(VCHIQ_MAKE_MSG(0, VCHIQ_PORT_MAX, 0)) == 0);
++vchiq_static_assert((unsigned int)VCHIQ_PORT_MAX <
++ (unsigned int)VCHIQ_PORT_FREE);
++
++#define VCHIQ_MSGID_PADDING VCHIQ_MAKE_MSG(VCHIQ_MSG_PADDING, 0, 0)
++#define VCHIQ_MSGID_CLAIMED 0x40000000
++
++#define VCHIQ_FOURCC_INVALID 0x00000000
++#define VCHIQ_FOURCC_IS_LEGAL(fourcc) (fourcc != VCHIQ_FOURCC_INVALID)
++
++#define VCHIQ_BULK_ACTUAL_ABORTED -1
++
++typedef uint32_t BITSET_T;
++
++vchiq_static_assert((sizeof(BITSET_T) * 8) == 32);
++
++#define BITSET_SIZE(b) ((b + 31) >> 5)
++#define BITSET_WORD(b) (b >> 5)
++#define BITSET_BIT(b) (1 << (b & 31))
++#define BITSET_ZERO(bs) memset(bs, 0, sizeof(bs))
++#define BITSET_IS_SET(bs, b) (bs[BITSET_WORD(b)] & BITSET_BIT(b))
++#define BITSET_SET(bs, b) (bs[BITSET_WORD(b)] |= BITSET_BIT(b))
++#define BITSET_CLR(bs, b) (bs[BITSET_WORD(b)] &= ~BITSET_BIT(b))
++
++#if VCHIQ_ENABLE_STATS
++#define VCHIQ_STATS_INC(state, stat) (state->stats. stat++)
++#define VCHIQ_SERVICE_STATS_INC(service, stat) (service->stats. stat++)
++#define VCHIQ_SERVICE_STATS_ADD(service, stat, addend) \
++ (service->stats. stat += addend)
++#else
++#define VCHIQ_STATS_INC(state, stat) ((void)0)
++#define VCHIQ_SERVICE_STATS_INC(service, stat) ((void)0)
++#define VCHIQ_SERVICE_STATS_ADD(service, stat, addend) ((void)0)
++#endif
++
++enum {
++ DEBUG_ENTRIES,
++#if VCHIQ_ENABLE_DEBUG
++ DEBUG_SLOT_HANDLER_COUNT,
++ DEBUG_SLOT_HANDLER_LINE,
++ DEBUG_PARSE_LINE,
++ DEBUG_PARSE_HEADER,
++ DEBUG_PARSE_MSGID,
++ DEBUG_AWAIT_COMPLETION_LINE,
++ DEBUG_DEQUEUE_MESSAGE_LINE,
++ DEBUG_SERVICE_CALLBACK_LINE,
++ DEBUG_MSG_QUEUE_FULL_COUNT,
++ DEBUG_COMPLETION_QUEUE_FULL_COUNT,
++#endif
++ DEBUG_MAX
++};
++
++#if VCHIQ_ENABLE_DEBUG
++
++#define DEBUG_INITIALISE(local) int *debug_ptr = (local)->debug;
++#define DEBUG_TRACE(d) \
++ do { debug_ptr[DEBUG_ ## d] = __LINE__; dsb(); } while (0)
++#define DEBUG_VALUE(d, v) \
++ do { debug_ptr[DEBUG_ ## d] = (v); dsb(); } while (0)
++#define DEBUG_COUNT(d) \
++ do { debug_ptr[DEBUG_ ## d]++; dsb(); } while (0)
++
++#else /* VCHIQ_ENABLE_DEBUG */
++
++#define DEBUG_INITIALISE(local)
++#define DEBUG_TRACE(d)
++#define DEBUG_VALUE(d, v)
++#define DEBUG_COUNT(d)
++
++#endif /* VCHIQ_ENABLE_DEBUG */
++
++typedef enum {
++ VCHIQ_CONNSTATE_DISCONNECTED,
++ VCHIQ_CONNSTATE_CONNECTING,
++ VCHIQ_CONNSTATE_CONNECTED,
++ VCHIQ_CONNSTATE_PAUSING,
++ VCHIQ_CONNSTATE_PAUSE_SENT,
++ VCHIQ_CONNSTATE_PAUSED,
++ VCHIQ_CONNSTATE_RESUMING,
++ VCHIQ_CONNSTATE_PAUSE_TIMEOUT,
++ VCHIQ_CONNSTATE_RESUME_TIMEOUT
++} VCHIQ_CONNSTATE_T;
++
++enum {
++ VCHIQ_SRVSTATE_FREE,
++ VCHIQ_SRVSTATE_HIDDEN,
++ VCHIQ_SRVSTATE_LISTENING,
++ VCHIQ_SRVSTATE_OPENING,
++ VCHIQ_SRVSTATE_OPEN,
++ VCHIQ_SRVSTATE_OPENSYNC,
++ VCHIQ_SRVSTATE_CLOSESENT,
++ VCHIQ_SRVSTATE_CLOSERECVD,
++ VCHIQ_SRVSTATE_CLOSEWAIT,
++ VCHIQ_SRVSTATE_CLOSED
++};
++
++enum {
++ VCHIQ_POLL_TERMINATE,
++ VCHIQ_POLL_REMOVE,
++ VCHIQ_POLL_TXNOTIFY,
++ VCHIQ_POLL_RXNOTIFY,
++ VCHIQ_POLL_COUNT
++};
++
++typedef enum {
++ VCHIQ_BULK_TRANSMIT,
++ VCHIQ_BULK_RECEIVE
++} VCHIQ_BULK_DIR_T;
++
++typedef void (*VCHIQ_USERDATA_TERM_T)(void *userdata);
++
++typedef struct vchiq_bulk_struct {
++ short mode;
++ short dir;
++ void *userdata;
++ VCHI_MEM_HANDLE_T handle;
++ void *data;
++ int size;
++ void *remote_data;
++ int remote_size;
++ int actual;
++} VCHIQ_BULK_T;
++
++typedef struct vchiq_bulk_queue_struct {
++ int local_insert; /* Where to insert the next local bulk */
++ int remote_insert; /* Where to insert the next remote bulk (master) */
++ int process; /* Bulk to transfer next */
++ int remote_notify; /* Bulk to notify the remote client of next (mstr) */
++ int remove; /* Bulk to notify the local client of, and remove,
++ ** next */
++ VCHIQ_BULK_T bulks[VCHIQ_NUM_SERVICE_BULKS];
++} VCHIQ_BULK_QUEUE_T;
++
++typedef struct remote_event_struct {
++ int armed;
++ int fired;
++ struct semaphore *event;
++} REMOTE_EVENT_T;
++
++typedef struct opaque_platform_state_t *VCHIQ_PLATFORM_STATE_T;
++
++typedef struct vchiq_state_struct VCHIQ_STATE_T;
++
++typedef struct vchiq_slot_struct {
++ char data[VCHIQ_SLOT_SIZE];
++} VCHIQ_SLOT_T;
++
++typedef struct vchiq_slot_info_struct {
++ /* Use two counters rather than one to avoid the need for a mutex. */
++ short use_count;
++ short release_count;
++} VCHIQ_SLOT_INFO_T;
++
++typedef struct vchiq_service_struct {
++ VCHIQ_SERVICE_BASE_T base;
++ VCHIQ_SERVICE_HANDLE_T handle;
++ unsigned int ref_count;
++ int srvstate;
++ VCHIQ_USERDATA_TERM_T userdata_term;
++ unsigned int localport;
++ unsigned int remoteport;
++ int public_fourcc;
++ int client_id;
++ char auto_close;
++ char sync;
++ char closing;
++ char trace;
++ atomic_t poll_flags;
++ short version;
++ short version_min;
++ short peer_version;
++
++ VCHIQ_STATE_T *state;
++ VCHIQ_INSTANCE_T instance;
++
++ int service_use_count;
++
++ VCHIQ_BULK_QUEUE_T bulk_tx;
++ VCHIQ_BULK_QUEUE_T bulk_rx;
++
++ struct semaphore remove_event;
++ struct semaphore bulk_remove_event;
++ struct mutex bulk_mutex;
++
++ struct service_stats_struct {
++ int quota_stalls;
++ int slot_stalls;
++ int bulk_stalls;
++ int error_count;
++ int ctrl_tx_count;
++ int ctrl_rx_count;
++ int bulk_tx_count;
++ int bulk_rx_count;
++ int bulk_aborted_count;
++ uint64_t ctrl_tx_bytes;
++ uint64_t ctrl_rx_bytes;
++ uint64_t bulk_tx_bytes;
++ uint64_t bulk_rx_bytes;
++ } stats;
++} VCHIQ_SERVICE_T;
++
++/* The quota information is outside VCHIQ_SERVICE_T so that it can be
++ statically allocated, since for accounting reasons a service's slot
++ usage is carried over between users of the same port number.
++ */
++typedef struct vchiq_service_quota_struct {
++ unsigned short slot_quota;
++ unsigned short slot_use_count;
++ unsigned short message_quota;
++ unsigned short message_use_count;
++ struct semaphore quota_event;
++ int previous_tx_index;
++} VCHIQ_SERVICE_QUOTA_T;
++
++typedef struct vchiq_shared_state_struct {
++
++ /* A non-zero value here indicates that the content is valid. */
++ int initialised;
++
++ /* The first and last (inclusive) slots allocated to the owner. */
++ int slot_first;
++ int slot_last;
++
++ /* The slot allocated to synchronous messages from the owner. */
++ int slot_sync;
++
++ /* Signalling this event indicates that owner's slot handler thread
++ ** should run. */
++ REMOTE_EVENT_T trigger;
++
++ /* Indicates the byte position within the stream where the next message
++ ** will be written. The least significant bits are an index into the
++ ** slot. The next bits are the index of the slot in slot_queue. */
++ int tx_pos;
++
++ /* This event should be signalled when a slot is recycled. */
++ REMOTE_EVENT_T recycle;
++
++ /* The slot_queue index where the next recycled slot will be written. */
++ int slot_queue_recycle;
++
++ /* This event should be signalled when a synchronous message is sent. */
++ REMOTE_EVENT_T sync_trigger;
++
++ /* This event should be signalled when a synchronous message has been
++ ** released. */
++ REMOTE_EVENT_T sync_release;
++
++ /* A circular buffer of slot indexes. */
++ int slot_queue[VCHIQ_MAX_SLOTS_PER_SIDE];
++
++ /* Debugging state */
++ int debug[DEBUG_MAX];
++} VCHIQ_SHARED_STATE_T;
++
++typedef struct vchiq_slot_zero_struct {
++ int magic;
++ short version;
++ short version_min;
++ int slot_zero_size;
++ int slot_size;
++ int max_slots;
++ int max_slots_per_side;
++ int platform_data[2];
++ VCHIQ_SHARED_STATE_T master;
++ VCHIQ_SHARED_STATE_T slave;
++ VCHIQ_SLOT_INFO_T slots[VCHIQ_MAX_SLOTS];
++} VCHIQ_SLOT_ZERO_T;
++
++struct vchiq_state_struct {
++ int id;
++ int initialised;
++ VCHIQ_CONNSTATE_T conn_state;
++ int is_master;
++
++ VCHIQ_SHARED_STATE_T *local;
++ VCHIQ_SHARED_STATE_T *remote;
++ VCHIQ_SLOT_T *slot_data;
++
++ unsigned short default_slot_quota;
++ unsigned short default_message_quota;
++
++ /* Event indicating connect message received */
++ struct semaphore connect;
++
++ /* Mutex protecting services */
++ struct mutex mutex;
++ VCHIQ_INSTANCE_T *instance;
++
++ /* Processes incoming messages */
++ struct task_struct *slot_handler_thread;
++
++ /* Processes recycled slots */
++ struct task_struct *recycle_thread;
++
++ /* Processes synchronous messages */
++ struct task_struct *sync_thread;
++
++ /* Local implementation of the trigger remote event */
++ struct semaphore trigger_event;
++
++ /* Local implementation of the recycle remote event */
++ struct semaphore recycle_event;
++
++ /* Local implementation of the sync trigger remote event */
++ struct semaphore sync_trigger_event;
++
++ /* Local implementation of the sync release remote event */
++ struct semaphore sync_release_event;
++
++ char *tx_data;
++ char *rx_data;
++ VCHIQ_SLOT_INFO_T *rx_info;
++
++ struct mutex slot_mutex;
++
++ struct mutex recycle_mutex;
++
++ struct mutex sync_mutex;
++
++ struct mutex bulk_transfer_mutex;
++
++ /* Indicates the byte position within the stream from where the next
++ ** message will be read. The least significant bits are an index into
++ ** the slot.The next bits are the index of the slot in
++ ** remote->slot_queue. */
++ int rx_pos;
++
++ /* A cached copy of local->tx_pos. Only write to local->tx_pos, and read
++ from remote->tx_pos. */
++ int local_tx_pos;
++
++ /* The slot_queue index of the slot to become available next. */
++ int slot_queue_available;
++
++ /* A flag to indicate if any poll has been requested */
++ int poll_needed;
++
++ /* Ths index of the previous slot used for data messages. */
++ int previous_data_index;
++
++ /* The number of slots occupied by data messages. */
++ unsigned short data_use_count;
++
++ /* The maximum number of slots to be occupied by data messages. */
++ unsigned short data_quota;
++
++ /* An array of bit sets indicating which services must be polled. */
++ atomic_t poll_services[BITSET_SIZE(VCHIQ_MAX_SERVICES)];
++
++ /* The number of the first unused service */
++ int unused_service;
++
++ /* Signalled when a free slot becomes available. */
++ struct semaphore slot_available_event;
++
++ struct semaphore slot_remove_event;
++
++ /* Signalled when a free data slot becomes available. */
++ struct semaphore data_quota_event;
++
++ /* Incremented when there are bulk transfers which cannot be processed
++ * whilst paused and must be processed on resume */
++ int deferred_bulks;
++
++ struct state_stats_struct {
++ int slot_stalls;
++ int data_stalls;
++ int ctrl_tx_count;
++ int ctrl_rx_count;
++ int error_count;
++ } stats;
++
++ VCHIQ_SERVICE_T * services[VCHIQ_MAX_SERVICES];
++ VCHIQ_SERVICE_QUOTA_T service_quotas[VCHIQ_MAX_SERVICES];
++ VCHIQ_SLOT_INFO_T slot_info[VCHIQ_MAX_SLOTS];
++
++ VCHIQ_PLATFORM_STATE_T platform_state;
++};
++
++struct bulk_waiter {
++ VCHIQ_BULK_T *bulk;
++ struct semaphore event;
++ int actual;
++};
++
++extern spinlock_t bulk_waiter_spinlock;
++
++extern int vchiq_core_log_level;
++extern int vchiq_core_msg_log_level;
++extern int vchiq_sync_log_level;
++
++extern VCHIQ_STATE_T *vchiq_states[VCHIQ_MAX_STATES];
++
++extern const char *
++get_conn_state_name(VCHIQ_CONNSTATE_T conn_state);
++
++extern VCHIQ_SLOT_ZERO_T *
++vchiq_init_slots(void *mem_base, int mem_size);
++
++extern VCHIQ_STATUS_T
++vchiq_init_state(VCHIQ_STATE_T *state, VCHIQ_SLOT_ZERO_T *slot_zero,
++ int is_master);
++
++extern VCHIQ_STATUS_T
++vchiq_connect_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance);
++
++extern VCHIQ_SERVICE_T *
++vchiq_add_service_internal(VCHIQ_STATE_T *state,
++ const VCHIQ_SERVICE_PARAMS_T *params, int srvstate,
++ VCHIQ_INSTANCE_T instance, VCHIQ_USERDATA_TERM_T userdata_term);
++
++extern VCHIQ_STATUS_T
++vchiq_open_service_internal(VCHIQ_SERVICE_T *service, int client_id);
++
++extern VCHIQ_STATUS_T
++vchiq_close_service_internal(VCHIQ_SERVICE_T *service, int close_recvd);
++
++extern void
++vchiq_terminate_service_internal(VCHIQ_SERVICE_T *service);
++
++extern void
++vchiq_free_service_internal(VCHIQ_SERVICE_T *service);
++
++extern VCHIQ_STATUS_T
++vchiq_shutdown_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance);
++
++extern VCHIQ_STATUS_T
++vchiq_pause_internal(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_resume_internal(VCHIQ_STATE_T *state);
++
++extern void
++remote_event_pollall(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle,
++ VCHI_MEM_HANDLE_T memhandle, void *offset, int size, void *userdata,
++ VCHIQ_BULK_MODE_T mode, VCHIQ_BULK_DIR_T dir);
++
++extern void
++vchiq_dump_state(void *dump_context, VCHIQ_STATE_T *state);
++
++extern void
++vchiq_dump_service_state(void *dump_context, VCHIQ_SERVICE_T *service);
++
++extern void
++vchiq_loud_error_header(void);
++
++extern void
++vchiq_loud_error_footer(void);
++
++extern void
++request_poll(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, int poll_type);
++
++static inline VCHIQ_SERVICE_T *
++handle_to_service(VCHIQ_SERVICE_HANDLE_T handle)
++{
++ VCHIQ_STATE_T *state = vchiq_states[(handle / VCHIQ_MAX_SERVICES) &
++ (VCHIQ_MAX_STATES - 1)];
++ if (!state)
++ return NULL;
++
++ return state->services[handle & (VCHIQ_MAX_SERVICES - 1)];
++}
++
++extern VCHIQ_SERVICE_T *
++find_service_by_handle(VCHIQ_SERVICE_HANDLE_T handle);
++
++extern VCHIQ_SERVICE_T *
++find_service_by_port(VCHIQ_STATE_T *state, int localport);
++
++extern VCHIQ_SERVICE_T *
++find_service_for_instance(VCHIQ_INSTANCE_T instance,
++ VCHIQ_SERVICE_HANDLE_T handle);
++
++extern VCHIQ_SERVICE_T *
++find_closed_service_for_instance(VCHIQ_INSTANCE_T instance,
++ VCHIQ_SERVICE_HANDLE_T handle);
++
++extern VCHIQ_SERVICE_T *
++next_service_by_instance(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance,
++ int *pidx);
++
++extern void
++lock_service(VCHIQ_SERVICE_T *service);
++
++extern void
++unlock_service(VCHIQ_SERVICE_T *service);
++
++/* The following functions are called from vchiq_core, and external
++** implementations must be provided. */
++
++extern VCHIQ_STATUS_T
++vchiq_prepare_bulk_data(VCHIQ_BULK_T *bulk,
++ VCHI_MEM_HANDLE_T memhandle, void *offset, int size, int dir);
++
++extern void
++vchiq_transfer_bulk(VCHIQ_BULK_T *bulk);
++
++extern void
++vchiq_complete_bulk(VCHIQ_BULK_T *bulk);
++
++extern VCHIQ_STATUS_T
++vchiq_copy_from_user(void *dst, const void *src, int size);
++
++extern void
++remote_event_signal(REMOTE_EVENT_T *event);
++
++void
++vchiq_platform_check_suspend(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_platform_paused(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_platform_resume(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_platform_resumed(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_dump(void *dump_context, const char *str, int len);
++
++extern void
++vchiq_dump_platform_state(void *dump_context);
++
++extern void
++vchiq_dump_platform_instances(void *dump_context);
++
++extern void
++vchiq_dump_platform_service_state(void *dump_context,
++ VCHIQ_SERVICE_T *service);
++
++extern VCHIQ_STATUS_T
++vchiq_use_service_internal(VCHIQ_SERVICE_T *service);
++
++extern VCHIQ_STATUS_T
++vchiq_release_service_internal(VCHIQ_SERVICE_T *service);
++
++extern void
++vchiq_on_remote_use(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_on_remote_release(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_platform_init_state(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_check_service(VCHIQ_SERVICE_T *service);
++
++extern void
++vchiq_on_remote_use_active(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_send_remote_use(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_send_remote_release(VCHIQ_STATE_T *state);
++
++extern VCHIQ_STATUS_T
++vchiq_send_remote_use_active(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_platform_conn_state_changed(VCHIQ_STATE_T *state,
++ VCHIQ_CONNSTATE_T oldstate, VCHIQ_CONNSTATE_T newstate);
++
++extern void
++vchiq_platform_handle_timeout(VCHIQ_STATE_T *state);
++
++extern void
++vchiq_set_conn_state(VCHIQ_STATE_T *state, VCHIQ_CONNSTATE_T newstate);
++
++
++extern void
++vchiq_log_dump_mem(const char *label, uint32_t addr, const void *voidMem,
++ size_t numBytes);
++
++#endif
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.c
+new file mode 100644
+index 0000000..7e03213
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.c
+@@ -0,0 +1,383 @@
++/**
++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved.
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++
++#include <linux/debugfs.h>
++#include "vchiq_core.h"
++#include "vchiq_arm.h"
++#include "vchiq_debugfs.h"
++
++#ifdef CONFIG_DEBUG_FS
++
++/****************************************************************************
++*
++* log category entries
++*
++***************************************************************************/
++#define DEBUGFS_WRITE_BUF_SIZE 256
++
++#define VCHIQ_LOG_ERROR_STR "error"
++#define VCHIQ_LOG_WARNING_STR "warning"
++#define VCHIQ_LOG_INFO_STR "info"
++#define VCHIQ_LOG_TRACE_STR "trace"
++
++
++/* Top-level debug info */
++struct vchiq_debugfs_info {
++ /* Global 'vchiq' debugfs entry used by all instances */
++ struct dentry *vchiq_cfg_dir;
++
++ /* one entry per client process */
++ struct dentry *clients;
++
++ /* log categories */
++ struct dentry *log_categories;
++};
++
++static struct vchiq_debugfs_info debugfs_info;
++
++/* Log category debugfs entries */
++struct vchiq_debugfs_log_entry {
++ const char *name;
++ int *plevel;
++ struct dentry *dir;
++};
++
++static struct vchiq_debugfs_log_entry vchiq_debugfs_log_entries[] = {
++ { "core", &vchiq_core_log_level },
++ { "msg", &vchiq_core_msg_log_level },
++ { "sync", &vchiq_sync_log_level },
++ { "susp", &vchiq_susp_log_level },
++ { "arm", &vchiq_arm_log_level },
++};
++static int n_log_entries =
++ sizeof(vchiq_debugfs_log_entries)/sizeof(vchiq_debugfs_log_entries[0]);
++
++
++static struct dentry *vchiq_clients_top(void);
++static struct dentry *vchiq_debugfs_top(void);
++
++static int debugfs_log_show(struct seq_file *f, void *offset)
++{
++ int *levp = f->private;
++ char *log_value = NULL;
++
++ switch (*levp) {
++ case VCHIQ_LOG_ERROR:
++ log_value = VCHIQ_LOG_ERROR_STR;
++ break;
++ case VCHIQ_LOG_WARNING:
++ log_value = VCHIQ_LOG_WARNING_STR;
++ break;
++ case VCHIQ_LOG_INFO:
++ log_value = VCHIQ_LOG_INFO_STR;
++ break;
++ case VCHIQ_LOG_TRACE:
++ log_value = VCHIQ_LOG_TRACE_STR;
++ break;
++ default:
++ break;
++ }
++
++ seq_printf(f, "%s\n", log_value ? log_value : "(null)");
++
++ return 0;
++}
++
++static int debugfs_log_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, debugfs_log_show, inode->i_private);
++}
++
++static int debugfs_log_write(struct file *file,
++ const char __user *buffer,
++ size_t count, loff_t *ppos)
++{
++ struct seq_file *f = (struct seq_file *)file->private_data;
++ int *levp = f->private;
++ char kbuf[DEBUGFS_WRITE_BUF_SIZE + 1];
++
++ memset(kbuf, 0, DEBUGFS_WRITE_BUF_SIZE + 1);
++ if (count >= DEBUGFS_WRITE_BUF_SIZE)
++ count = DEBUGFS_WRITE_BUF_SIZE;
++
++ if (copy_from_user(kbuf, buffer, count) != 0)
++ return -EFAULT;
++ kbuf[count - 1] = 0;
++
++ if (strncmp("error", kbuf, strlen("error")) == 0)
++ *levp = VCHIQ_LOG_ERROR;
++ else if (strncmp("warning", kbuf, strlen("warning")) == 0)
++ *levp = VCHIQ_LOG_WARNING;
++ else if (strncmp("info", kbuf, strlen("info")) == 0)
++ *levp = VCHIQ_LOG_INFO;
++ else if (strncmp("trace", kbuf, strlen("trace")) == 0)
++ *levp = VCHIQ_LOG_TRACE;
++ else
++ *levp = VCHIQ_LOG_DEFAULT;
++
++ *ppos += count;
++
++ return count;
++}
++
++static const struct file_operations debugfs_log_fops = {
++ .owner = THIS_MODULE,
++ .open = debugfs_log_open,
++ .write = debugfs_log_write,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++/* create an entry under <debugfs>/vchiq/log for each log category */
++static int vchiq_debugfs_create_log_entries(struct dentry *top)
++{
++ struct dentry *dir;
++ size_t i;
++ int ret = 0;
++ dir = debugfs_create_dir("log", vchiq_debugfs_top());
++ if (!dir)
++ return -ENOMEM;
++ debugfs_info.log_categories = dir;
++
++ for (i = 0; i < n_log_entries; i++) {
++ void *levp = (void *)vchiq_debugfs_log_entries[i].plevel;
++ dir = debugfs_create_file(vchiq_debugfs_log_entries[i].name,
++ 0644,
++ debugfs_info.log_categories,
++ levp,
++ &debugfs_log_fops);
++ if (!dir) {
++ ret = -ENOMEM;
++ break;
++ }
++
++ vchiq_debugfs_log_entries[i].dir = dir;
++ }
++ return ret;
++}
++
++static int debugfs_usecount_show(struct seq_file *f, void *offset)
++{
++ VCHIQ_INSTANCE_T instance = f->private;
++ int use_count;
++
++ use_count = vchiq_instance_get_use_count(instance);
++ seq_printf(f, "%d\n", use_count);
++
++ return 0;
++}
++
++static int debugfs_usecount_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, debugfs_usecount_show, inode->i_private);
++}
++
++static const struct file_operations debugfs_usecount_fops = {
++ .owner = THIS_MODULE,
++ .open = debugfs_usecount_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static int debugfs_trace_show(struct seq_file *f, void *offset)
++{
++ VCHIQ_INSTANCE_T instance = f->private;
++ int trace;
++
++ trace = vchiq_instance_get_trace(instance);
++ seq_printf(f, "%s\n", trace ? "Y" : "N");
++
++ return 0;
++}
++
++static int debugfs_trace_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, debugfs_trace_show, inode->i_private);
++}
++
++static int debugfs_trace_write(struct file *file,
++ const char __user *buffer,
++ size_t count, loff_t *ppos)
++{
++ struct seq_file *f = (struct seq_file *)file->private_data;
++ VCHIQ_INSTANCE_T instance = f->private;
++ char firstchar;
++
++ if (copy_from_user(&firstchar, buffer, 1) != 0)
++ return -EFAULT;
++
++ switch (firstchar) {
++ case 'Y':
++ case 'y':
++ case '1':
++ vchiq_instance_set_trace(instance, 1);
++ break;
++ case 'N':
++ case 'n':
++ case '0':
++ vchiq_instance_set_trace(instance, 0);
++ break;
++ default:
++ break;
++ }
++
++ *ppos += count;
++
++ return count;
++}
++
++static const struct file_operations debugfs_trace_fops = {
++ .owner = THIS_MODULE,
++ .open = debugfs_trace_open,
++ .write = debugfs_trace_write,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++/* add an instance (process) to the debugfs entries */
++int vchiq_debugfs_add_instance(VCHIQ_INSTANCE_T instance)
++{
++ char pidstr[16];
++ struct dentry *top, *use_count, *trace;
++ struct dentry *clients = vchiq_clients_top();
++
++ snprintf(pidstr, sizeof(pidstr), "%d",
++ vchiq_instance_get_pid(instance));
++
++ top = debugfs_create_dir(pidstr, clients);
++ if (!top)
++ goto fail_top;
++
++ use_count = debugfs_create_file("use_count",
++ 0444, top,
++ instance,
++ &debugfs_usecount_fops);
++ if (!use_count)
++ goto fail_use_count;
++
++ trace = debugfs_create_file("trace",
++ 0644, top,
++ instance,
++ &debugfs_trace_fops);
++ if (!trace)
++ goto fail_trace;
++
++ vchiq_instance_get_debugfs_node(instance)->dentry = top;
++
++ return 0;
++
++fail_trace:
++ debugfs_remove(use_count);
++fail_use_count:
++ debugfs_remove(top);
++fail_top:
++ return -ENOMEM;
++}
++
++void vchiq_debugfs_remove_instance(VCHIQ_INSTANCE_T instance)
++{
++ VCHIQ_DEBUGFS_NODE_T *node = vchiq_instance_get_debugfs_node(instance);
++ debugfs_remove_recursive(node->dentry);
++}
++
++
++int vchiq_debugfs_init(void)
++{
++ BUG_ON(debugfs_info.vchiq_cfg_dir != NULL);
++
++ debugfs_info.vchiq_cfg_dir = debugfs_create_dir("vchiq", NULL);
++ if (debugfs_info.vchiq_cfg_dir == NULL)
++ goto fail;
++
++ debugfs_info.clients = debugfs_create_dir("clients",
++ vchiq_debugfs_top());
++ if (!debugfs_info.clients)
++ goto fail;
++
++ if (vchiq_debugfs_create_log_entries(vchiq_debugfs_top()) != 0)
++ goto fail;
++
++ return 0;
++
++fail:
++ vchiq_debugfs_deinit();
++ vchiq_log_error(vchiq_arm_log_level,
++ "%s: failed to create debugfs directory",
++ __func__);
++
++ return -ENOMEM;
++}
++
++/* remove all the debugfs entries */
++void vchiq_debugfs_deinit(void)
++{
++ debugfs_remove_recursive(vchiq_debugfs_top());
++}
++
++static struct dentry *vchiq_clients_top(void)
++{
++ return debugfs_info.clients;
++}
++
++static struct dentry *vchiq_debugfs_top(void)
++{
++ BUG_ON(debugfs_info.vchiq_cfg_dir == NULL);
++ return debugfs_info.vchiq_cfg_dir;
++}
++
++#else /* CONFIG_DEBUG_FS */
++
++int vchiq_debugfs_init(void)
++{
++ return 0;
++}
++
++void vchiq_debugfs_deinit(void)
++{
++}
++
++int vchiq_debugfs_add_instance(VCHIQ_INSTANCE_T instance)
++{
++ return 0;
++}
++
++void vchiq_debugfs_remove_instance(VCHIQ_INSTANCE_T instance)
++{
++}
++
++#endif /* CONFIG_DEBUG_FS */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.h
+new file mode 100644
+index 0000000..4d6a378
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.h
+@@ -0,0 +1,52 @@
++/**
++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_DEBUGFS_H
++#define VCHIQ_DEBUGFS_H
++
++#include "vchiq_core.h"
++
++typedef struct vchiq_debugfs_node_struct
++{
++ struct dentry *dentry;
++} VCHIQ_DEBUGFS_NODE_T;
++
++int vchiq_debugfs_init(void);
++
++void vchiq_debugfs_deinit(void);
++
++int vchiq_debugfs_add_instance(VCHIQ_INSTANCE_T instance);
++
++void vchiq_debugfs_remove_instance(VCHIQ_INSTANCE_T instance);
++
++#endif /* VCHIQ_DEBUGFS_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_genversion b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_genversion
+new file mode 100644
+index 0000000..9f5b634
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_genversion
+@@ -0,0 +1,87 @@
++#!/usr/bin/perl -w
++
++use strict;
++
++#
++# Generate a version from available information
++#
++
++my $prefix = shift @ARGV;
++my $root = shift @ARGV;
++
++
++if ( not defined $root ) {
++ die "usage: $0 prefix root-dir\n";
++}
++
++if ( ! -d $root ) {
++ die "root directory $root not found\n";
++}
++
++my $version = "unknown";
++my $tainted = "";
++
++if ( -d "$root/.git" ) {
++ # attempt to work out git version. only do so
++ # on a linux build host, as cygwin builds are
++ # already slow enough
++
++ if ( -f "/usr/bin/git" || -f "/usr/local/bin/git" ) {
++ if (not open(F, "git --git-dir $root/.git rev-parse --verify HEAD|")) {
++ $version = "no git version";
++ }
++ else {
++ $version = <F>;
++ $version =~ s/[ \r\n]*$//; # chomp may not be enough (cygwin).
++ $version =~ s/^[ \r\n]*//; # chomp may not be enough (cygwin).
++ }
++
++ if (open(G, "git --git-dir $root/.git status --porcelain|")) {
++ $tainted = <G>;
++ $tainted =~ s/[ \r\n]*$//; # chomp may not be enough (cygwin).
++ $tainted =~ s/^[ \r\n]*//; # chomp may not be enough (cygwin).
++ if (length $tainted) {
++ $version = join ' ', $version, "(tainted)";
++ }
++ else {
++ $version = join ' ', $version, "(clean)";
++ }
++ }
++ }
++}
++
++my $hostname = `hostname`;
++$hostname =~ s/[ \r\n]*$//; # chomp may not be enough (cygwin).
++$hostname =~ s/^[ \r\n]*//; # chomp may not be enough (cygwin).
++
++
++print STDERR "Version $version\n";
++print <<EOF;
++#include "${prefix}_build_info.h"
++#include <linux/broadcom/vc_debug_sym.h>
++
++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_hostname, "$hostname" );
++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_version, "$version" );
++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_time, __TIME__ );
++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_date, __DATE__ );
++
++const char *vchiq_get_build_hostname( void )
++{
++ return vchiq_build_hostname;
++}
++
++const char *vchiq_get_build_version( void )
++{
++ return vchiq_build_version;
++}
++
++const char *vchiq_get_build_date( void )
++{
++ return vchiq_build_date;
++}
++
++const char *vchiq_get_build_time( void )
++{
++ return vchiq_build_time;
++}
++EOF
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_if.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_if.h
+new file mode 100644
+index 0000000..8067bbe
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_if.h
+@@ -0,0 +1,189 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_IF_H
++#define VCHIQ_IF_H
++
++#include "interface/vchi/vchi_mh.h"
++
++#define VCHIQ_SERVICE_HANDLE_INVALID 0
++
++#define VCHIQ_SLOT_SIZE 4096
++#define VCHIQ_MAX_MSG_SIZE (VCHIQ_SLOT_SIZE - sizeof(VCHIQ_HEADER_T))
++#define VCHIQ_CHANNEL_SIZE VCHIQ_MAX_MSG_SIZE /* For backwards compatibility */
++
++#define VCHIQ_MAKE_FOURCC(x0, x1, x2, x3) \
++ (((x0) << 24) | ((x1) << 16) | ((x2) << 8) | (x3))
++#define VCHIQ_GET_SERVICE_USERDATA(service) vchiq_get_service_userdata(service)
++#define VCHIQ_GET_SERVICE_FOURCC(service) vchiq_get_service_fourcc(service)
++
++typedef enum {
++ VCHIQ_SERVICE_OPENED, /* service, -, - */
++ VCHIQ_SERVICE_CLOSED, /* service, -, - */
++ VCHIQ_MESSAGE_AVAILABLE, /* service, header, - */
++ VCHIQ_BULK_TRANSMIT_DONE, /* service, -, bulk_userdata */
++ VCHIQ_BULK_RECEIVE_DONE, /* service, -, bulk_userdata */
++ VCHIQ_BULK_TRANSMIT_ABORTED, /* service, -, bulk_userdata */
++ VCHIQ_BULK_RECEIVE_ABORTED /* service, -, bulk_userdata */
++} VCHIQ_REASON_T;
++
++typedef enum {
++ VCHIQ_ERROR = -1,
++ VCHIQ_SUCCESS = 0,
++ VCHIQ_RETRY = 1
++} VCHIQ_STATUS_T;
++
++typedef enum {
++ VCHIQ_BULK_MODE_CALLBACK,
++ VCHIQ_BULK_MODE_BLOCKING,
++ VCHIQ_BULK_MODE_NOCALLBACK,
++ VCHIQ_BULK_MODE_WAITING /* Reserved for internal use */
++} VCHIQ_BULK_MODE_T;
++
++typedef enum {
++ VCHIQ_SERVICE_OPTION_AUTOCLOSE,
++ VCHIQ_SERVICE_OPTION_SLOT_QUOTA,
++ VCHIQ_SERVICE_OPTION_MESSAGE_QUOTA,
++ VCHIQ_SERVICE_OPTION_SYNCHRONOUS,
++ VCHIQ_SERVICE_OPTION_TRACE
++} VCHIQ_SERVICE_OPTION_T;
++
++typedef struct vchiq_header_struct {
++ /* The message identifier - opaque to applications. */
++ int msgid;
++
++ /* Size of message data. */
++ unsigned int size;
++
++ char data[0]; /* message */
++} VCHIQ_HEADER_T;
++
++typedef struct {
++ const void *data;
++ unsigned int size;
++} VCHIQ_ELEMENT_T;
++
++typedef unsigned int VCHIQ_SERVICE_HANDLE_T;
++
++typedef VCHIQ_STATUS_T (*VCHIQ_CALLBACK_T)(VCHIQ_REASON_T, VCHIQ_HEADER_T *,
++ VCHIQ_SERVICE_HANDLE_T, void *);
++
++typedef struct vchiq_service_base_struct {
++ int fourcc;
++ VCHIQ_CALLBACK_T callback;
++ void *userdata;
++} VCHIQ_SERVICE_BASE_T;
++
++typedef struct vchiq_service_params_struct {
++ int fourcc;
++ VCHIQ_CALLBACK_T callback;
++ void *userdata;
++ short version; /* Increment for non-trivial changes */
++ short version_min; /* Update for incompatible changes */
++} VCHIQ_SERVICE_PARAMS_T;
++
++typedef struct vchiq_config_struct {
++ unsigned int max_msg_size;
++ unsigned int bulk_threshold; /* The message size above which it
++ is better to use a bulk transfer
++ (<= max_msg_size) */
++ unsigned int max_outstanding_bulks;
++ unsigned int max_services;
++ short version; /* The version of VCHIQ */
++ short version_min; /* The minimum compatible version of VCHIQ */
++} VCHIQ_CONFIG_T;
++
++typedef struct vchiq_instance_struct *VCHIQ_INSTANCE_T;
++typedef void (*VCHIQ_REMOTE_USE_CALLBACK_T)(void *cb_arg);
++
++extern VCHIQ_STATUS_T vchiq_initialise(VCHIQ_INSTANCE_T *pinstance);
++extern VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance);
++extern VCHIQ_STATUS_T vchiq_connect(VCHIQ_INSTANCE_T instance);
++extern VCHIQ_STATUS_T vchiq_add_service(VCHIQ_INSTANCE_T instance,
++ const VCHIQ_SERVICE_PARAMS_T *params,
++ VCHIQ_SERVICE_HANDLE_T *pservice);
++extern VCHIQ_STATUS_T vchiq_open_service(VCHIQ_INSTANCE_T instance,
++ const VCHIQ_SERVICE_PARAMS_T *params,
++ VCHIQ_SERVICE_HANDLE_T *pservice);
++extern VCHIQ_STATUS_T vchiq_close_service(VCHIQ_SERVICE_HANDLE_T service);
++extern VCHIQ_STATUS_T vchiq_remove_service(VCHIQ_SERVICE_HANDLE_T service);
++extern VCHIQ_STATUS_T vchiq_use_service(VCHIQ_SERVICE_HANDLE_T service);
++extern VCHIQ_STATUS_T vchiq_use_service_no_resume(
++ VCHIQ_SERVICE_HANDLE_T service);
++extern VCHIQ_STATUS_T vchiq_release_service(VCHIQ_SERVICE_HANDLE_T service);
++
++extern VCHIQ_STATUS_T vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T service,
++ const VCHIQ_ELEMENT_T *elements, unsigned int count);
++extern void vchiq_release_message(VCHIQ_SERVICE_HANDLE_T service,
++ VCHIQ_HEADER_T *header);
++extern VCHIQ_STATUS_T vchiq_queue_bulk_transmit(VCHIQ_SERVICE_HANDLE_T service,
++ const void *data, unsigned int size, void *userdata);
++extern VCHIQ_STATUS_T vchiq_queue_bulk_receive(VCHIQ_SERVICE_HANDLE_T service,
++ void *data, unsigned int size, void *userdata);
++extern VCHIQ_STATUS_T vchiq_queue_bulk_transmit_handle(
++ VCHIQ_SERVICE_HANDLE_T service, VCHI_MEM_HANDLE_T handle,
++ const void *offset, unsigned int size, void *userdata);
++extern VCHIQ_STATUS_T vchiq_queue_bulk_receive_handle(
++ VCHIQ_SERVICE_HANDLE_T service, VCHI_MEM_HANDLE_T handle,
++ void *offset, unsigned int size, void *userdata);
++extern VCHIQ_STATUS_T vchiq_bulk_transmit(VCHIQ_SERVICE_HANDLE_T service,
++ const void *data, unsigned int size, void *userdata,
++ VCHIQ_BULK_MODE_T mode);
++extern VCHIQ_STATUS_T vchiq_bulk_receive(VCHIQ_SERVICE_HANDLE_T service,
++ void *data, unsigned int size, void *userdata,
++ VCHIQ_BULK_MODE_T mode);
++extern VCHIQ_STATUS_T vchiq_bulk_transmit_handle(VCHIQ_SERVICE_HANDLE_T service,
++ VCHI_MEM_HANDLE_T handle, const void *offset, unsigned int size,
++ void *userdata, VCHIQ_BULK_MODE_T mode);
++extern VCHIQ_STATUS_T vchiq_bulk_receive_handle(VCHIQ_SERVICE_HANDLE_T service,
++ VCHI_MEM_HANDLE_T handle, void *offset, unsigned int size,
++ void *userdata, VCHIQ_BULK_MODE_T mode);
++extern int vchiq_get_client_id(VCHIQ_SERVICE_HANDLE_T service);
++extern void *vchiq_get_service_userdata(VCHIQ_SERVICE_HANDLE_T service);
++extern int vchiq_get_service_fourcc(VCHIQ_SERVICE_HANDLE_T service);
++extern VCHIQ_STATUS_T vchiq_get_config(VCHIQ_INSTANCE_T instance,
++ int config_size, VCHIQ_CONFIG_T *pconfig);
++extern VCHIQ_STATUS_T vchiq_set_service_option(VCHIQ_SERVICE_HANDLE_T service,
++ VCHIQ_SERVICE_OPTION_T option, int value);
++
++extern VCHIQ_STATUS_T vchiq_remote_use(VCHIQ_INSTANCE_T instance,
++ VCHIQ_REMOTE_USE_CALLBACK_T callback, void *cb_arg);
++extern VCHIQ_STATUS_T vchiq_remote_release(VCHIQ_INSTANCE_T instance);
++
++extern VCHIQ_STATUS_T vchiq_dump_phys_mem(VCHIQ_SERVICE_HANDLE_T service,
++ void *ptr, size_t num_bytes);
++
++extern VCHIQ_STATUS_T vchiq_get_peer_version(VCHIQ_SERVICE_HANDLE_T handle,
++ short *peer_version);
++
++#endif /* VCHIQ_IF_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_ioctl.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
+new file mode 100644
+index 0000000..6137ae9
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
+@@ -0,0 +1,131 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_IOCTLS_H
++#define VCHIQ_IOCTLS_H
++
++#include <linux/ioctl.h>
++#include "vchiq_if.h"
++
++#define VCHIQ_IOC_MAGIC 0xc4
++#define VCHIQ_INVALID_HANDLE (~0)
++
++typedef struct {
++ VCHIQ_SERVICE_PARAMS_T params;
++ int is_open;
++ int is_vchi;
++ unsigned int handle; /* OUT */
++} VCHIQ_CREATE_SERVICE_T;
++
++typedef struct {
++ unsigned int handle;
++ unsigned int count;
++ const VCHIQ_ELEMENT_T *elements;
++} VCHIQ_QUEUE_MESSAGE_T;
++
++typedef struct {
++ unsigned int handle;
++ void *data;
++ unsigned int size;
++ void *userdata;
++ VCHIQ_BULK_MODE_T mode;
++} VCHIQ_QUEUE_BULK_TRANSFER_T;
++
++typedef struct {
++ VCHIQ_REASON_T reason;
++ VCHIQ_HEADER_T *header;
++ void *service_userdata;
++ void *bulk_userdata;
++} VCHIQ_COMPLETION_DATA_T;
++
++typedef struct {
++ unsigned int count;
++ VCHIQ_COMPLETION_DATA_T *buf;
++ unsigned int msgbufsize;
++ unsigned int msgbufcount; /* IN/OUT */
++ void **msgbufs;
++} VCHIQ_AWAIT_COMPLETION_T;
++
++typedef struct {
++ unsigned int handle;
++ int blocking;
++ unsigned int bufsize;
++ void *buf;
++} VCHIQ_DEQUEUE_MESSAGE_T;
++
++typedef struct {
++ unsigned int config_size;
++ VCHIQ_CONFIG_T *pconfig;
++} VCHIQ_GET_CONFIG_T;
++
++typedef struct {
++ unsigned int handle;
++ VCHIQ_SERVICE_OPTION_T option;
++ int value;
++} VCHIQ_SET_SERVICE_OPTION_T;
++
++typedef struct {
++ void *virt_addr;
++ size_t num_bytes;
++} VCHIQ_DUMP_MEM_T;
++
++#define VCHIQ_IOC_CONNECT _IO(VCHIQ_IOC_MAGIC, 0)
++#define VCHIQ_IOC_SHUTDOWN _IO(VCHIQ_IOC_MAGIC, 1)
++#define VCHIQ_IOC_CREATE_SERVICE \
++ _IOWR(VCHIQ_IOC_MAGIC, 2, VCHIQ_CREATE_SERVICE_T)
++#define VCHIQ_IOC_REMOVE_SERVICE _IO(VCHIQ_IOC_MAGIC, 3)
++#define VCHIQ_IOC_QUEUE_MESSAGE \
++ _IOW(VCHIQ_IOC_MAGIC, 4, VCHIQ_QUEUE_MESSAGE_T)
++#define VCHIQ_IOC_QUEUE_BULK_TRANSMIT \
++ _IOWR(VCHIQ_IOC_MAGIC, 5, VCHIQ_QUEUE_BULK_TRANSFER_T)
++#define VCHIQ_IOC_QUEUE_BULK_RECEIVE \
++ _IOWR(VCHIQ_IOC_MAGIC, 6, VCHIQ_QUEUE_BULK_TRANSFER_T)
++#define VCHIQ_IOC_AWAIT_COMPLETION \
++ _IOWR(VCHIQ_IOC_MAGIC, 7, VCHIQ_AWAIT_COMPLETION_T)
++#define VCHIQ_IOC_DEQUEUE_MESSAGE \
++ _IOWR(VCHIQ_IOC_MAGIC, 8, VCHIQ_DEQUEUE_MESSAGE_T)
++#define VCHIQ_IOC_GET_CLIENT_ID _IO(VCHIQ_IOC_MAGIC, 9)
++#define VCHIQ_IOC_GET_CONFIG \
++ _IOWR(VCHIQ_IOC_MAGIC, 10, VCHIQ_GET_CONFIG_T)
++#define VCHIQ_IOC_CLOSE_SERVICE _IO(VCHIQ_IOC_MAGIC, 11)
++#define VCHIQ_IOC_USE_SERVICE _IO(VCHIQ_IOC_MAGIC, 12)
++#define VCHIQ_IOC_RELEASE_SERVICE _IO(VCHIQ_IOC_MAGIC, 13)
++#define VCHIQ_IOC_SET_SERVICE_OPTION \
++ _IOW(VCHIQ_IOC_MAGIC, 14, VCHIQ_SET_SERVICE_OPTION_T)
++#define VCHIQ_IOC_DUMP_PHYS_MEM \
++ _IOW(VCHIQ_IOC_MAGIC, 15, VCHIQ_DUMP_MEM_T)
++#define VCHIQ_IOC_LIB_VERSION _IO(VCHIQ_IOC_MAGIC, 16)
++#define VCHIQ_IOC_CLOSE_DELIVERED _IO(VCHIQ_IOC_MAGIC, 17)
++#define VCHIQ_IOC_MAX 17
++
++#endif
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c
+new file mode 100644
+index 0000000..be9735f
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c
+@@ -0,0 +1,456 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++/* ---- Include Files ---------------------------------------------------- */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/mutex.h>
++
++#include "vchiq_core.h"
++#include "vchiq_arm.h"
++
++/* ---- Public Variables ------------------------------------------------- */
++
++/* ---- Private Constants and Types -------------------------------------- */
++
++struct bulk_waiter_node {
++ struct bulk_waiter bulk_waiter;
++ int pid;
++ struct list_head list;
++};
++
++struct vchiq_instance_struct {
++ VCHIQ_STATE_T *state;
++
++ int connected;
++
++ struct list_head bulk_waiter_list;
++ struct mutex bulk_waiter_list_mutex;
++};
++
++static VCHIQ_STATUS_T
++vchiq_blocking_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, void *data,
++ unsigned int size, VCHIQ_BULK_DIR_T dir);
++
++/****************************************************************************
++*
++* vchiq_initialise
++*
++***************************************************************************/
++#define VCHIQ_INIT_RETRIES 10
++VCHIQ_STATUS_T vchiq_initialise(VCHIQ_INSTANCE_T *instanceOut)
++{
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++ VCHIQ_STATE_T *state;
++ VCHIQ_INSTANCE_T instance = NULL;
++ int i;
++
++ vchiq_log_trace(vchiq_core_log_level, "%s called", __func__);
++
++ /* VideoCore may not be ready due to boot up timing.
++ It may never be ready if kernel and firmware are mismatched, so don't block forever. */
++ for (i=0; i<VCHIQ_INIT_RETRIES; i++) {
++ state = vchiq_get_state();
++ if (state)
++ break;
++ udelay(500);
++ }
++ if (i==VCHIQ_INIT_RETRIES) {
++ vchiq_log_error(vchiq_core_log_level,
++ "%s: videocore not initialized\n", __func__);
++ goto failed;
++ } else if (i>0) {
++ vchiq_log_warning(vchiq_core_log_level,
++ "%s: videocore initialized after %d retries\n", __func__, i);
++ }
++
++ instance = kzalloc(sizeof(*instance), GFP_KERNEL);
++ if (!instance) {
++ vchiq_log_error(vchiq_core_log_level,
++ "%s: error allocating vchiq instance\n", __func__);
++ goto failed;
++ }
++
++ instance->connected = 0;
++ instance->state = state;
++ mutex_init(&instance->bulk_waiter_list_mutex);
++ INIT_LIST_HEAD(&instance->bulk_waiter_list);
++
++ *instanceOut = instance;
++
++ status = VCHIQ_SUCCESS;
++
++failed:
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p): returning %d", __func__, instance, status);
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_initialise);
++
++/****************************************************************************
++*
++* vchiq_shutdown
++*
++***************************************************************************/
++
++VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance)
++{
++ VCHIQ_STATUS_T status;
++ VCHIQ_STATE_T *state = instance->state;
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p) called", __func__, instance);
++
++ if (mutex_lock_interruptible(&state->mutex) != 0)
++ return VCHIQ_RETRY;
++
++ /* Remove all services */
++ status = vchiq_shutdown_internal(state, instance);
++
++ mutex_unlock(&state->mutex);
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p): returning %d", __func__, instance, status);
++
++ if (status == VCHIQ_SUCCESS) {
++ struct list_head *pos, *next;
++ list_for_each_safe(pos, next,
++ &instance->bulk_waiter_list) {
++ struct bulk_waiter_node *waiter;
++ waiter = list_entry(pos,
++ struct bulk_waiter_node,
++ list);
++ list_del(pos);
++ vchiq_log_info(vchiq_arm_log_level,
++ "bulk_waiter - cleaned up %x "
++ "for pid %d",
++ (unsigned int)waiter, waiter->pid);
++ kfree(waiter);
++ }
++ kfree(instance);
++ }
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_shutdown);
++
++/****************************************************************************
++*
++* vchiq_is_connected
++*
++***************************************************************************/
++
++int vchiq_is_connected(VCHIQ_INSTANCE_T instance)
++{
++ return instance->connected;
++}
++
++/****************************************************************************
++*
++* vchiq_connect
++*
++***************************************************************************/
++
++VCHIQ_STATUS_T vchiq_connect(VCHIQ_INSTANCE_T instance)
++{
++ VCHIQ_STATUS_T status;
++ VCHIQ_STATE_T *state = instance->state;
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p) called", __func__, instance);
++
++ if (mutex_lock_interruptible(&state->mutex) != 0) {
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s: call to mutex_lock failed", __func__);
++ status = VCHIQ_RETRY;
++ goto failed;
++ }
++ status = vchiq_connect_internal(state, instance);
++
++ if (status == VCHIQ_SUCCESS)
++ instance->connected = 1;
++
++ mutex_unlock(&state->mutex);
++
++failed:
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p): returning %d", __func__, instance, status);
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_connect);
++
++/****************************************************************************
++*
++* vchiq_add_service
++*
++***************************************************************************/
++
++VCHIQ_STATUS_T vchiq_add_service(
++ VCHIQ_INSTANCE_T instance,
++ const VCHIQ_SERVICE_PARAMS_T *params,
++ VCHIQ_SERVICE_HANDLE_T *phandle)
++{
++ VCHIQ_STATUS_T status;
++ VCHIQ_STATE_T *state = instance->state;
++ VCHIQ_SERVICE_T *service = NULL;
++ int srvstate;
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p) called", __func__, instance);
++
++ *phandle = VCHIQ_SERVICE_HANDLE_INVALID;
++
++ srvstate = vchiq_is_connected(instance)
++ ? VCHIQ_SRVSTATE_LISTENING
++ : VCHIQ_SRVSTATE_HIDDEN;
++
++ service = vchiq_add_service_internal(
++ state,
++ params,
++ srvstate,
++ instance,
++ NULL);
++
++ if (service) {
++ *phandle = service->handle;
++ status = VCHIQ_SUCCESS;
++ } else
++ status = VCHIQ_ERROR;
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p): returning %d", __func__, instance, status);
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_add_service);
++
++/****************************************************************************
++*
++* vchiq_open_service
++*
++***************************************************************************/
++
++VCHIQ_STATUS_T vchiq_open_service(
++ VCHIQ_INSTANCE_T instance,
++ const VCHIQ_SERVICE_PARAMS_T *params,
++ VCHIQ_SERVICE_HANDLE_T *phandle)
++{
++ VCHIQ_STATUS_T status = VCHIQ_ERROR;
++ VCHIQ_STATE_T *state = instance->state;
++ VCHIQ_SERVICE_T *service = NULL;
++
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p) called", __func__, instance);
++
++ *phandle = VCHIQ_SERVICE_HANDLE_INVALID;
++
++ if (!vchiq_is_connected(instance))
++ goto failed;
++
++ service = vchiq_add_service_internal(state,
++ params,
++ VCHIQ_SRVSTATE_OPENING,
++ instance,
++ NULL);
++
++ if (service) {
++ status = vchiq_open_service_internal(service, current->pid);
++ if (status == VCHIQ_SUCCESS)
++ *phandle = service->handle;
++ else
++ vchiq_remove_service(service->handle);
++ }
++
++failed:
++ vchiq_log_trace(vchiq_core_log_level,
++ "%s(%p): returning %d", __func__, instance, status);
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_open_service);
++
++VCHIQ_STATUS_T
++vchiq_queue_bulk_transmit(VCHIQ_SERVICE_HANDLE_T handle,
++ const void *data, unsigned int size, void *userdata)
++{
++ return vchiq_bulk_transfer(handle,
++ VCHI_MEM_HANDLE_INVALID, (void *)data, size, userdata,
++ VCHIQ_BULK_MODE_CALLBACK, VCHIQ_BULK_TRANSMIT);
++}
++EXPORT_SYMBOL(vchiq_queue_bulk_transmit);
++
++VCHIQ_STATUS_T
++vchiq_queue_bulk_receive(VCHIQ_SERVICE_HANDLE_T handle, void *data,
++ unsigned int size, void *userdata)
++{
++ return vchiq_bulk_transfer(handle,
++ VCHI_MEM_HANDLE_INVALID, data, size, userdata,
++ VCHIQ_BULK_MODE_CALLBACK, VCHIQ_BULK_RECEIVE);
++}
++EXPORT_SYMBOL(vchiq_queue_bulk_receive);
++
++VCHIQ_STATUS_T
++vchiq_bulk_transmit(VCHIQ_SERVICE_HANDLE_T handle, const void *data,
++ unsigned int size, void *userdata, VCHIQ_BULK_MODE_T mode)
++{
++ VCHIQ_STATUS_T status;
++
++ switch (mode) {
++ case VCHIQ_BULK_MODE_NOCALLBACK:
++ case VCHIQ_BULK_MODE_CALLBACK:
++ status = vchiq_bulk_transfer(handle,
++ VCHI_MEM_HANDLE_INVALID, (void *)data, size, userdata,
++ mode, VCHIQ_BULK_TRANSMIT);
++ break;
++ case VCHIQ_BULK_MODE_BLOCKING:
++ status = vchiq_blocking_bulk_transfer(handle,
++ (void *)data, size, VCHIQ_BULK_TRANSMIT);
++ break;
++ default:
++ return VCHIQ_ERROR;
++ }
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_bulk_transmit);
++
++VCHIQ_STATUS_T
++vchiq_bulk_receive(VCHIQ_SERVICE_HANDLE_T handle, void *data,
++ unsigned int size, void *userdata, VCHIQ_BULK_MODE_T mode)
++{
++ VCHIQ_STATUS_T status;
++
++ switch (mode) {
++ case VCHIQ_BULK_MODE_NOCALLBACK:
++ case VCHIQ_BULK_MODE_CALLBACK:
++ status = vchiq_bulk_transfer(handle,
++ VCHI_MEM_HANDLE_INVALID, data, size, userdata,
++ mode, VCHIQ_BULK_RECEIVE);
++ break;
++ case VCHIQ_BULK_MODE_BLOCKING:
++ status = vchiq_blocking_bulk_transfer(handle,
++ (void *)data, size, VCHIQ_BULK_RECEIVE);
++ break;
++ default:
++ return VCHIQ_ERROR;
++ }
++
++ return status;
++}
++EXPORT_SYMBOL(vchiq_bulk_receive);
++
++static VCHIQ_STATUS_T
++vchiq_blocking_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, void *data,
++ unsigned int size, VCHIQ_BULK_DIR_T dir)
++{
++ VCHIQ_INSTANCE_T instance;
++ VCHIQ_SERVICE_T *service;
++ VCHIQ_STATUS_T status;
++ struct bulk_waiter_node *waiter = NULL;
++ struct list_head *pos;
++
++ service = find_service_by_handle(handle);
++ if (!service)
++ return VCHIQ_ERROR;
++
++ instance = service->instance;
++
++ unlock_service(service);
++
++ mutex_lock(&instance->bulk_waiter_list_mutex);
++ list_for_each(pos, &instance->bulk_waiter_list) {
++ if (list_entry(pos, struct bulk_waiter_node,
++ list)->pid == current->pid) {
++ waiter = list_entry(pos,
++ struct bulk_waiter_node,
++ list);
++ list_del(pos);
++ break;
++ }
++ }
++ mutex_unlock(&instance->bulk_waiter_list_mutex);
++
++ if (waiter) {
++ VCHIQ_BULK_T *bulk = waiter->bulk_waiter.bulk;
++ if (bulk) {
++ /* This thread has an outstanding bulk transfer. */
++ if ((bulk->data != data) ||
++ (bulk->size != size)) {
++ /* This is not a retry of the previous one.
++ ** Cancel the signal when the transfer
++ ** completes. */
++ spin_lock(&bulk_waiter_spinlock);
++ bulk->userdata = NULL;
++ spin_unlock(&bulk_waiter_spinlock);
++ }
++ }
++ }
++
++ if (!waiter) {
++ waiter = kzalloc(sizeof(struct bulk_waiter_node), GFP_KERNEL);
++ if (!waiter) {
++ vchiq_log_error(vchiq_core_log_level,
++ "%s - out of memory", __func__);
++ return VCHIQ_ERROR;
++ }
++ }
++
++ status = vchiq_bulk_transfer(handle, VCHI_MEM_HANDLE_INVALID,
++ data, size, &waiter->bulk_waiter, VCHIQ_BULK_MODE_BLOCKING,
++ dir);
++ if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) ||
++ !waiter->bulk_waiter.bulk) {
++ VCHIQ_BULK_T *bulk = waiter->bulk_waiter.bulk;
++ if (bulk) {
++ /* Cancel the signal when the transfer
++ ** completes. */
++ spin_lock(&bulk_waiter_spinlock);
++ bulk->userdata = NULL;
++ spin_unlock(&bulk_waiter_spinlock);
++ }
++ kfree(waiter);
++ } else {
++ waiter->pid = current->pid;
++ mutex_lock(&instance->bulk_waiter_list_mutex);
++ list_add(&waiter->list, &instance->bulk_waiter_list);
++ mutex_unlock(&instance->bulk_waiter_list_mutex);
++ vchiq_log_info(vchiq_arm_log_level,
++ "saved bulk_waiter %x for pid %d",
++ (unsigned int)waiter, current->pid);
++ }
++
++ return status;
++}
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_memdrv.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_memdrv.h
+new file mode 100644
+index 0000000..d02e776
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_memdrv.h
+@@ -0,0 +1,71 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_MEMDRV_H
++#define VCHIQ_MEMDRV_H
++
++/* ---- Include Files ----------------------------------------------------- */
++
++#include <linux/kernel.h>
++#include "vchiq_if.h"
++
++/* ---- Constants and Types ---------------------------------------------- */
++
++typedef struct {
++ void *armSharedMemVirt;
++ dma_addr_t armSharedMemPhys;
++ size_t armSharedMemSize;
++
++ void *vcSharedMemVirt;
++ dma_addr_t vcSharedMemPhys;
++ size_t vcSharedMemSize;
++} VCHIQ_SHARED_MEM_INFO_T;
++
++/* ---- Variable Externs ------------------------------------------------- */
++
++/* ---- Function Prototypes ---------------------------------------------- */
++
++void vchiq_get_shared_mem_info(VCHIQ_SHARED_MEM_INFO_T *info);
++
++VCHIQ_STATUS_T vchiq_memdrv_initialise(void);
++
++VCHIQ_STATUS_T vchiq_userdrv_create_instance(
++ const VCHIQ_PLATFORM_DATA_T * platform_data);
++
++VCHIQ_STATUS_T vchiq_userdrv_suspend(
++ const VCHIQ_PLATFORM_DATA_T * platform_data);
++
++VCHIQ_STATUS_T vchiq_userdrv_resume(
++ const VCHIQ_PLATFORM_DATA_T * platform_data);
++
++#endif
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_pagelist.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_pagelist.h
+new file mode 100644
+index 0000000..54a3ece
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_pagelist.h
+@@ -0,0 +1,58 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_PAGELIST_H
++#define VCHIQ_PAGELIST_H
++
++#ifndef PAGE_SIZE
++#define PAGE_SIZE 4096
++#endif
++#define CACHE_LINE_SIZE 32
++#define PAGELIST_WRITE 0
++#define PAGELIST_READ 1
++#define PAGELIST_READ_WITH_FRAGMENTS 2
++
++typedef struct pagelist_struct {
++ unsigned long length;
++ unsigned short type;
++ unsigned short offset;
++ unsigned long addrs[1]; /* N.B. 12 LSBs hold the number of following
++ pages at consecutive addresses. */
++} PAGELIST_T;
++
++typedef struct fragments_struct {
++ char headbuf[CACHE_LINE_SIZE];
++ char tailbuf[CACHE_LINE_SIZE];
++} FRAGMENTS_T;
++
++#endif /* VCHIQ_PAGELIST_H */
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_shim.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_shim.c
+new file mode 100644
+index 0000000..72eacdaf
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_shim.c
+@@ -0,0 +1,853 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++#include <linux/module.h>
++#include <linux/types.h>
++
++#include "interface/vchi/vchi.h"
++#include "vchiq.h"
++#include "vchiq_core.h"
++
++#include "vchiq_util.h"
++
++#include <stddef.h>
++
++#define vchiq_status_to_vchi(status) ((int32_t)status)
++
++typedef struct {
++ VCHIQ_SERVICE_HANDLE_T handle;
++
++ VCHIU_QUEUE_T queue;
++
++ VCHI_CALLBACK_T callback;
++ void *callback_param;
++} SHIM_SERVICE_T;
++
++/* ----------------------------------------------------------------------
++ * return pointer to the mphi message driver function table
++ * -------------------------------------------------------------------- */
++const VCHI_MESSAGE_DRIVER_T *
++vchi_mphi_message_driver_func_table(void)
++{
++ return NULL;
++}
++
++/* ----------------------------------------------------------------------
++ * return a pointer to the 'single' connection driver fops
++ * -------------------------------------------------------------------- */
++const VCHI_CONNECTION_API_T *
++single_get_func_table(void)
++{
++ return NULL;
++}
++
++VCHI_CONNECTION_T *vchi_create_connection(
++ const VCHI_CONNECTION_API_T *function_table,
++ const VCHI_MESSAGE_DRIVER_T *low_level)
++{
++ (void)function_table;
++ (void)low_level;
++ return NULL;
++}
++
++/***********************************************************
++ * Name: vchi_msg_peek
++ *
++ * Arguments: const VCHI_SERVICE_HANDLE_T handle,
++ * void **data,
++ * uint32_t *msg_size,
++
++
++ * VCHI_FLAGS_T flags
++ *
++ * Description: Routine to return a pointer to the current message (to allow in
++ * place processing). The message can be removed using
++ * vchi_msg_remove when you're finished
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_msg_peek(VCHI_SERVICE_HANDLE_T handle,
++ void **data,
++ uint32_t *msg_size,
++ VCHI_FLAGS_T flags)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_HEADER_T *header;
++
++ WARN_ON((flags != VCHI_FLAGS_NONE) &&
++ (flags != VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE));
++
++ if (flags == VCHI_FLAGS_NONE)
++ if (vchiu_queue_is_empty(&service->queue))
++ return -1;
++
++ header = vchiu_queue_peek(&service->queue);
++
++ *data = header->data;
++ *msg_size = header->size;
++
++ return 0;
++}
++EXPORT_SYMBOL(vchi_msg_peek);
++
++/***********************************************************
++ * Name: vchi_msg_remove
++ *
++ * Arguments: const VCHI_SERVICE_HANDLE_T handle,
++ *
++ * Description: Routine to remove a message (after it has been read with
++ * vchi_msg_peek)
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_msg_remove(VCHI_SERVICE_HANDLE_T handle)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_HEADER_T *header;
++
++ header = vchiu_queue_pop(&service->queue);
++
++ vchiq_release_message(service->handle, header);
++
++ return 0;
++}
++EXPORT_SYMBOL(vchi_msg_remove);
++
++/***********************************************************
++ * Name: vchi_msg_queue
++ *
++ * Arguments: VCHI_SERVICE_HANDLE_T handle,
++ * const void *data,
++ * uint32_t data_size,
++ * VCHI_FLAGS_T flags,
++ * void *msg_handle,
++ *
++ * Description: Thin wrapper to queue a message onto a connection
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_msg_queue(VCHI_SERVICE_HANDLE_T handle,
++ const void *data,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *msg_handle)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_ELEMENT_T element = {data, data_size};
++ VCHIQ_STATUS_T status;
++
++ (void)msg_handle;
++
++ WARN_ON(flags != VCHI_FLAGS_BLOCK_UNTIL_QUEUED);
++
++ status = vchiq_queue_message(service->handle, &element, 1);
++
++ /* vchiq_queue_message() may return VCHIQ_RETRY, so we need to
++ ** implement a retry mechanism since this function is supposed
++ ** to block until queued
++ */
++ while (status == VCHIQ_RETRY) {
++ msleep(1);
++ status = vchiq_queue_message(service->handle, &element, 1);
++ }
++
++ return vchiq_status_to_vchi(status);
++}
++EXPORT_SYMBOL(vchi_msg_queue);
++
++/***********************************************************
++ * Name: vchi_bulk_queue_receive
++ *
++ * Arguments: VCHI_BULK_HANDLE_T handle,
++ * void *data_dst,
++ * const uint32_t data_size,
++ * VCHI_FLAGS_T flags
++ * void *bulk_handle
++ *
++ * Description: Routine to setup a rcv buffer
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_bulk_queue_receive(VCHI_SERVICE_HANDLE_T handle,
++ void *data_dst,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *bulk_handle)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_BULK_MODE_T mode;
++ VCHIQ_STATUS_T status;
++
++ switch ((int)flags) {
++ case VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE
++ | VCHI_FLAGS_BLOCK_UNTIL_QUEUED:
++ WARN_ON(!service->callback);
++ mode = VCHIQ_BULK_MODE_CALLBACK;
++ break;
++ case VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE:
++ mode = VCHIQ_BULK_MODE_BLOCKING;
++ break;
++ case VCHI_FLAGS_BLOCK_UNTIL_QUEUED:
++ case VCHI_FLAGS_NONE:
++ mode = VCHIQ_BULK_MODE_NOCALLBACK;
++ break;
++ default:
++ WARN(1, "unsupported message\n");
++ return vchiq_status_to_vchi(VCHIQ_ERROR);
++ }
++
++ status = vchiq_bulk_receive(service->handle, data_dst, data_size,
++ bulk_handle, mode);
++
++ /* vchiq_bulk_receive() may return VCHIQ_RETRY, so we need to
++ ** implement a retry mechanism since this function is supposed
++ ** to block until queued
++ */
++ while (status == VCHIQ_RETRY) {
++ msleep(1);
++ status = vchiq_bulk_receive(service->handle, data_dst,
++ data_size, bulk_handle, mode);
++ }
++
++ return vchiq_status_to_vchi(status);
++}
++EXPORT_SYMBOL(vchi_bulk_queue_receive);
++
++/***********************************************************
++ * Name: vchi_bulk_queue_transmit
++ *
++ * Arguments: VCHI_BULK_HANDLE_T handle,
++ * const void *data_src,
++ * uint32_t data_size,
++ * VCHI_FLAGS_T flags,
++ * void *bulk_handle
++ *
++ * Description: Routine to transmit some data
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_bulk_queue_transmit(VCHI_SERVICE_HANDLE_T handle,
++ const void *data_src,
++ uint32_t data_size,
++ VCHI_FLAGS_T flags,
++ void *bulk_handle)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_BULK_MODE_T mode;
++ VCHIQ_STATUS_T status;
++
++ switch ((int)flags) {
++ case VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE
++ | VCHI_FLAGS_BLOCK_UNTIL_QUEUED:
++ WARN_ON(!service->callback);
++ mode = VCHIQ_BULK_MODE_CALLBACK;
++ break;
++ case VCHI_FLAGS_BLOCK_UNTIL_DATA_READ:
++ case VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE:
++ mode = VCHIQ_BULK_MODE_BLOCKING;
++ break;
++ case VCHI_FLAGS_BLOCK_UNTIL_QUEUED:
++ case VCHI_FLAGS_NONE:
++ mode = VCHIQ_BULK_MODE_NOCALLBACK;
++ break;
++ default:
++ WARN(1, "unsupported message\n");
++ return vchiq_status_to_vchi(VCHIQ_ERROR);
++ }
++
++ status = vchiq_bulk_transmit(service->handle, data_src, data_size,
++ bulk_handle, mode);
++
++ /* vchiq_bulk_transmit() may return VCHIQ_RETRY, so we need to
++ ** implement a retry mechanism since this function is supposed
++ ** to block until queued
++ */
++ while (status == VCHIQ_RETRY) {
++ msleep(1);
++ status = vchiq_bulk_transmit(service->handle, data_src,
++ data_size, bulk_handle, mode);
++ }
++
++ return vchiq_status_to_vchi(status);
++}
++EXPORT_SYMBOL(vchi_bulk_queue_transmit);
++
++/***********************************************************
++ * Name: vchi_msg_dequeue
++ *
++ * Arguments: VCHI_SERVICE_HANDLE_T handle,
++ * void *data,
++ * uint32_t max_data_size_to_read,
++ * uint32_t *actual_msg_size
++ * VCHI_FLAGS_T flags
++ *
++ * Description: Routine to dequeue a message into the supplied buffer
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_msg_dequeue(VCHI_SERVICE_HANDLE_T handle,
++ void *data,
++ uint32_t max_data_size_to_read,
++ uint32_t *actual_msg_size,
++ VCHI_FLAGS_T flags)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_HEADER_T *header;
++
++ WARN_ON((flags != VCHI_FLAGS_NONE) &&
++ (flags != VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE));
++
++ if (flags == VCHI_FLAGS_NONE)
++ if (vchiu_queue_is_empty(&service->queue))
++ return -1;
++
++ header = vchiu_queue_pop(&service->queue);
++
++ memcpy(data, header->data, header->size < max_data_size_to_read ?
++ header->size : max_data_size_to_read);
++
++ *actual_msg_size = header->size;
++
++ vchiq_release_message(service->handle, header);
++
++ return 0;
++}
++EXPORT_SYMBOL(vchi_msg_dequeue);
++
++/***********************************************************
++ * Name: vchi_msg_queuev
++ *
++ * Arguments: VCHI_SERVICE_HANDLE_T handle,
++ * VCHI_MSG_VECTOR_T *vector,
++ * uint32_t count,
++ * VCHI_FLAGS_T flags,
++ * void *msg_handle
++ *
++ * Description: Thin wrapper to queue a message onto a connection
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++
++vchiq_static_assert(sizeof(VCHI_MSG_VECTOR_T) == sizeof(VCHIQ_ELEMENT_T));
++vchiq_static_assert(offsetof(VCHI_MSG_VECTOR_T, vec_base) ==
++ offsetof(VCHIQ_ELEMENT_T, data));
++vchiq_static_assert(offsetof(VCHI_MSG_VECTOR_T, vec_len) ==
++ offsetof(VCHIQ_ELEMENT_T, size));
++
++int32_t vchi_msg_queuev(VCHI_SERVICE_HANDLE_T handle,
++ VCHI_MSG_VECTOR_T *vector,
++ uint32_t count,
++ VCHI_FLAGS_T flags,
++ void *msg_handle)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++
++ (void)msg_handle;
++
++ WARN_ON(flags != VCHI_FLAGS_BLOCK_UNTIL_QUEUED);
++
++ return vchiq_status_to_vchi(vchiq_queue_message(service->handle,
++ (const VCHIQ_ELEMENT_T *)vector, count));
++}
++EXPORT_SYMBOL(vchi_msg_queuev);
++
++/***********************************************************
++ * Name: vchi_held_msg_release
++ *
++ * Arguments: VCHI_HELD_MSG_T *message
++ *
++ * Description: Routine to release a held message (after it has been read with
++ * vchi_msg_hold)
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_held_msg_release(VCHI_HELD_MSG_T *message)
++{
++ vchiq_release_message((VCHIQ_SERVICE_HANDLE_T)message->service,
++ (VCHIQ_HEADER_T *)message->message);
++
++ return 0;
++}
++EXPORT_SYMBOL(vchi_held_msg_release);
++
++/***********************************************************
++ * Name: vchi_msg_hold
++ *
++ * Arguments: VCHI_SERVICE_HANDLE_T handle,
++ * void **data,
++ * uint32_t *msg_size,
++ * VCHI_FLAGS_T flags,
++ * VCHI_HELD_MSG_T *message_handle
++ *
++ * Description: Routine to return a pointer to the current message (to allow
++ * in place processing). The message is dequeued - don't forget
++ * to release the message using vchi_held_msg_release when you're
++ * finished.
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++int32_t vchi_msg_hold(VCHI_SERVICE_HANDLE_T handle,
++ void **data,
++ uint32_t *msg_size,
++ VCHI_FLAGS_T flags,
++ VCHI_HELD_MSG_T *message_handle)
++{
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_HEADER_T *header;
++
++ WARN_ON((flags != VCHI_FLAGS_NONE) &&
++ (flags != VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE));
++
++ if (flags == VCHI_FLAGS_NONE)
++ if (vchiu_queue_is_empty(&service->queue))
++ return -1;
++
++ header = vchiu_queue_pop(&service->queue);
++
++ *data = header->data;
++ *msg_size = header->size;
++
++ message_handle->service =
++ (struct opaque_vchi_service_t *)service->handle;
++ message_handle->message = header;
++
++ return 0;
++}
++EXPORT_SYMBOL(vchi_msg_hold);
++
++/***********************************************************
++ * Name: vchi_initialise
++ *
++ * Arguments: VCHI_INSTANCE_T *instance_handle
++ *
++ * Description: Initialises the hardware but does not transmit anything
++ * When run as a Host App this will be called twice hence the need
++ * to malloc the state information
++ *
++ * Returns: 0 if successful, failure otherwise
++ *
++ ***********************************************************/
++
++int32_t vchi_initialise(VCHI_INSTANCE_T *instance_handle)
++{
++ VCHIQ_INSTANCE_T instance;
++ VCHIQ_STATUS_T status;
++
++ status = vchiq_initialise(&instance);
++
++ *instance_handle = (VCHI_INSTANCE_T)instance;
++
++ return vchiq_status_to_vchi(status);
++}
++EXPORT_SYMBOL(vchi_initialise);
++
++/***********************************************************
++ * Name: vchi_connect
++ *
++ * Arguments: VCHI_CONNECTION_T **connections
++ * const uint32_t num_connections
++ * VCHI_INSTANCE_T instance_handle)
++ *
++ * Description: Starts the command service on each connection,
++ * causing INIT messages to be pinged back and forth
++ *
++ * Returns: 0 if successful, failure otherwise
++ *
++ ***********************************************************/
++int32_t vchi_connect(VCHI_CONNECTION_T **connections,
++ const uint32_t num_connections,
++ VCHI_INSTANCE_T instance_handle)
++{
++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle;
++
++ (void)connections;
++ (void)num_connections;
++
++ return vchiq_connect(instance);
++}
++EXPORT_SYMBOL(vchi_connect);
++
++
++/***********************************************************
++ * Name: vchi_disconnect
++ *
++ * Arguments: VCHI_INSTANCE_T instance_handle
++ *
++ * Description: Stops the command service on each connection,
++ * causing DE-INIT messages to be pinged back and forth
++ *
++ * Returns: 0 if successful, failure otherwise
++ *
++ ***********************************************************/
++int32_t vchi_disconnect(VCHI_INSTANCE_T instance_handle)
++{
++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle;
++ return vchiq_status_to_vchi(vchiq_shutdown(instance));
++}
++EXPORT_SYMBOL(vchi_disconnect);
++
++
++/***********************************************************
++ * Name: vchi_service_open
++ * Name: vchi_service_create
++ *
++ * Arguments: VCHI_INSTANCE_T *instance_handle
++ * SERVICE_CREATION_T *setup,
++ * VCHI_SERVICE_HANDLE_T *handle
++ *
++ * Description: Routine to open a service
++ *
++ * Returns: int32_t - success == 0
++ *
++ ***********************************************************/
++
++static VCHIQ_STATUS_T shim_callback(VCHIQ_REASON_T reason,
++ VCHIQ_HEADER_T *header, VCHIQ_SERVICE_HANDLE_T handle, void *bulk_user)
++{
++ SHIM_SERVICE_T *service =
++ (SHIM_SERVICE_T *)VCHIQ_GET_SERVICE_USERDATA(handle);
++
++ if (!service->callback)
++ goto release;
++
++ switch (reason) {
++ case VCHIQ_MESSAGE_AVAILABLE:
++ vchiu_queue_push(&service->queue, header);
++
++ service->callback(service->callback_param,
++ VCHI_CALLBACK_MSG_AVAILABLE, NULL);
++
++ goto done;
++ break;
++
++ case VCHIQ_BULK_TRANSMIT_DONE:
++ service->callback(service->callback_param,
++ VCHI_CALLBACK_BULK_SENT, bulk_user);
++ break;
++
++ case VCHIQ_BULK_RECEIVE_DONE:
++ service->callback(service->callback_param,
++ VCHI_CALLBACK_BULK_RECEIVED, bulk_user);
++ break;
++
++ case VCHIQ_SERVICE_CLOSED:
++ service->callback(service->callback_param,
++ VCHI_CALLBACK_SERVICE_CLOSED, NULL);
++ break;
++
++ case VCHIQ_SERVICE_OPENED:
++ /* No equivalent VCHI reason */
++ break;
++
++ case VCHIQ_BULK_TRANSMIT_ABORTED:
++ service->callback(service->callback_param,
++ VCHI_CALLBACK_BULK_TRANSMIT_ABORTED,
++ bulk_user);
++ break;
++
++ case VCHIQ_BULK_RECEIVE_ABORTED:
++ service->callback(service->callback_param,
++ VCHI_CALLBACK_BULK_RECEIVE_ABORTED,
++ bulk_user);
++ break;
++
++ default:
++ WARN(1, "not supported\n");
++ break;
++ }
++
++release:
++ vchiq_release_message(service->handle, header);
++done:
++ return VCHIQ_SUCCESS;
++}
++
++static SHIM_SERVICE_T *service_alloc(VCHIQ_INSTANCE_T instance,
++ SERVICE_CREATION_T *setup)
++{
++ SHIM_SERVICE_T *service = kzalloc(sizeof(SHIM_SERVICE_T), GFP_KERNEL);
++
++ (void)instance;
++
++ if (service) {
++ if (vchiu_queue_init(&service->queue, 64)) {
++ service->callback = setup->callback;
++ service->callback_param = setup->callback_param;
++ } else {
++ kfree(service);
++ service = NULL;
++ }
++ }
++
++ return service;
++}
++
++static void service_free(SHIM_SERVICE_T *service)
++{
++ if (service) {
++ vchiu_queue_delete(&service->queue);
++ kfree(service);
++ }
++}
++
++int32_t vchi_service_open(VCHI_INSTANCE_T instance_handle,
++ SERVICE_CREATION_T *setup,
++ VCHI_SERVICE_HANDLE_T *handle)
++{
++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle;
++ SHIM_SERVICE_T *service = service_alloc(instance, setup);
++ if (service) {
++ VCHIQ_SERVICE_PARAMS_T params;
++ VCHIQ_STATUS_T status;
++
++ memset(¶ms, 0, sizeof(params));
++ params.fourcc = setup->service_id;
++ params.callback = shim_callback;
++ params.userdata = service;
++ params.version = setup->version.version;
++ params.version_min = setup->version.version_min;
++
++ status = vchiq_open_service(instance, ¶ms,
++ &service->handle);
++ if (status != VCHIQ_SUCCESS) {
++ service_free(service);
++ service = NULL;
++ }
++ }
++
++ *handle = (VCHI_SERVICE_HANDLE_T)service;
++
++ return (service != NULL) ? 0 : -1;
++}
++EXPORT_SYMBOL(vchi_service_open);
++
++int32_t vchi_service_create(VCHI_INSTANCE_T instance_handle,
++ SERVICE_CREATION_T *setup,
++ VCHI_SERVICE_HANDLE_T *handle)
++{
++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle;
++ SHIM_SERVICE_T *service = service_alloc(instance, setup);
++ if (service) {
++ VCHIQ_SERVICE_PARAMS_T params;
++ VCHIQ_STATUS_T status;
++
++ memset(¶ms, 0, sizeof(params));
++ params.fourcc = setup->service_id;
++ params.callback = shim_callback;
++ params.userdata = service;
++ params.version = setup->version.version;
++ params.version_min = setup->version.version_min;
++ status = vchiq_add_service(instance, ¶ms, &service->handle);
++
++ if (status != VCHIQ_SUCCESS) {
++ service_free(service);
++ service = NULL;
++ }
++ }
++
++ *handle = (VCHI_SERVICE_HANDLE_T)service;
++
++ return (service != NULL) ? 0 : -1;
++}
++EXPORT_SYMBOL(vchi_service_create);
++
++int32_t vchi_service_close(const VCHI_SERVICE_HANDLE_T handle)
++{
++ int32_t ret = -1;
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ if (service) {
++ VCHIQ_STATUS_T status = vchiq_close_service(service->handle);
++ if (status == VCHIQ_SUCCESS) {
++ service_free(service);
++ service = NULL;
++ }
++
++ ret = vchiq_status_to_vchi(status);
++ }
++ return ret;
++}
++EXPORT_SYMBOL(vchi_service_close);
++
++int32_t vchi_service_destroy(const VCHI_SERVICE_HANDLE_T handle)
++{
++ int32_t ret = -1;
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ if (service) {
++ VCHIQ_STATUS_T status = vchiq_remove_service(service->handle);
++ if (status == VCHIQ_SUCCESS) {
++ service_free(service);
++ service = NULL;
++ }
++
++ ret = vchiq_status_to_vchi(status);
++ }
++ return ret;
++}
++EXPORT_SYMBOL(vchi_service_destroy);
++
++int32_t vchi_service_set_option(const VCHI_SERVICE_HANDLE_T handle,
++ VCHI_SERVICE_OPTION_T option,
++ int value)
++{
++ int32_t ret = -1;
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ VCHIQ_SERVICE_OPTION_T vchiq_option;
++ switch (option) {
++ case VCHI_SERVICE_OPTION_TRACE:
++ vchiq_option = VCHIQ_SERVICE_OPTION_TRACE;
++ break;
++ default:
++ service = NULL;
++ break;
++ }
++ if (service) {
++ VCHIQ_STATUS_T status =
++ vchiq_set_service_option(service->handle,
++ vchiq_option,
++ value);
++
++ ret = vchiq_status_to_vchi(status);
++ }
++ return ret;
++}
++EXPORT_SYMBOL(vchi_service_set_option);
++
++int32_t vchi_get_peer_version( const VCHI_SERVICE_HANDLE_T handle, short *peer_version )
++{
++ int32_t ret = -1;
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ if(service)
++ {
++ VCHIQ_STATUS_T status = vchiq_get_peer_version(service->handle, peer_version);
++ ret = vchiq_status_to_vchi( status );
++ }
++ return ret;
++}
++EXPORT_SYMBOL(vchi_get_peer_version);
++
++/* ----------------------------------------------------------------------
++ * read a uint32_t from buffer.
++ * network format is defined to be little endian
++ * -------------------------------------------------------------------- */
++uint32_t
++vchi_readbuf_uint32(const void *_ptr)
++{
++ const unsigned char *ptr = _ptr;
++ return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
++}
++
++/* ----------------------------------------------------------------------
++ * write a uint32_t to buffer.
++ * network format is defined to be little endian
++ * -------------------------------------------------------------------- */
++void
++vchi_writebuf_uint32(void *_ptr, uint32_t value)
++{
++ unsigned char *ptr = _ptr;
++ ptr[0] = (unsigned char)((value >> 0) & 0xFF);
++ ptr[1] = (unsigned char)((value >> 8) & 0xFF);
++ ptr[2] = (unsigned char)((value >> 16) & 0xFF);
++ ptr[3] = (unsigned char)((value >> 24) & 0xFF);
++}
++
++/* ----------------------------------------------------------------------
++ * read a uint16_t from buffer.
++ * network format is defined to be little endian
++ * -------------------------------------------------------------------- */
++uint16_t
++vchi_readbuf_uint16(const void *_ptr)
++{
++ const unsigned char *ptr = _ptr;
++ return ptr[0] | (ptr[1] << 8);
++}
++
++/* ----------------------------------------------------------------------
++ * write a uint16_t into the buffer.
++ * network format is defined to be little endian
++ * -------------------------------------------------------------------- */
++void
++vchi_writebuf_uint16(void *_ptr, uint16_t value)
++{
++ unsigned char *ptr = _ptr;
++ ptr[0] = (value >> 0) & 0xFF;
++ ptr[1] = (value >> 8) & 0xFF;
++}
++
++/***********************************************************
++ * Name: vchi_service_use
++ *
++ * Arguments: const VCHI_SERVICE_HANDLE_T handle
++ *
++ * Description: Routine to increment refcount on a service
++ *
++ * Returns: void
++ *
++ ***********************************************************/
++int32_t vchi_service_use(const VCHI_SERVICE_HANDLE_T handle)
++{
++ int32_t ret = -1;
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ if (service)
++ ret = vchiq_status_to_vchi(vchiq_use_service(service->handle));
++ return ret;
++}
++EXPORT_SYMBOL(vchi_service_use);
++
++/***********************************************************
++ * Name: vchi_service_release
++ *
++ * Arguments: const VCHI_SERVICE_HANDLE_T handle
++ *
++ * Description: Routine to decrement refcount on a service
++ *
++ * Returns: void
++ *
++ ***********************************************************/
++int32_t vchi_service_release(const VCHI_SERVICE_HANDLE_T handle)
++{
++ int32_t ret = -1;
++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle;
++ if (service)
++ ret = vchiq_status_to_vchi(
++ vchiq_release_service(service->handle));
++ return ret;
++}
++EXPORT_SYMBOL(vchi_service_release);
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c
+new file mode 100644
+index 0000000..c2eefef
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c
+@@ -0,0 +1,151 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#include "vchiq_util.h"
++
++static inline int is_pow2(int i)
++{
++ return i && !(i & (i - 1));
++}
++
++int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size)
++{
++ WARN_ON(!is_pow2(size));
++
++ queue->size = size;
++ queue->read = 0;
++ queue->write = 0;
++
++ sema_init(&queue->pop, 0);
++ sema_init(&queue->push, 0);
++
++ queue->storage = kzalloc(size * sizeof(VCHIQ_HEADER_T *), GFP_KERNEL);
++ if (queue->storage == NULL) {
++ vchiu_queue_delete(queue);
++ return 0;
++ }
++ return 1;
++}
++
++void vchiu_queue_delete(VCHIU_QUEUE_T *queue)
++{
++ if (queue->storage != NULL)
++ kfree(queue->storage);
++}
++
++int vchiu_queue_is_empty(VCHIU_QUEUE_T *queue)
++{
++ return queue->read == queue->write;
++}
++
++int vchiu_queue_is_full(VCHIU_QUEUE_T *queue)
++{
++ return queue->write == queue->read + queue->size;
++}
++
++void vchiu_queue_push(VCHIU_QUEUE_T *queue, VCHIQ_HEADER_T *header)
++{
++ while (queue->write == queue->read + queue->size) {
++ if (down_interruptible(&queue->pop) != 0) {
++ flush_signals(current);
++ }
++ }
++
++ /*
++ * Write to queue->storage must be visible after read from
++ * queue->read
++ */
++ smp_mb();
++
++ queue->storage[queue->write & (queue->size - 1)] = header;
++
++ /*
++ * Write to queue->storage must be visible before write to
++ * queue->write
++ */
++ smp_wmb();
++
++ queue->write++;
++
++ up(&queue->push);
++}
++
++VCHIQ_HEADER_T *vchiu_queue_peek(VCHIU_QUEUE_T *queue)
++{
++ while (queue->write == queue->read) {
++ if (down_interruptible(&queue->push) != 0) {
++ flush_signals(current);
++ }
++ }
++
++ up(&queue->push); // We haven't removed anything from the queue.
++
++ /*
++ * Read from queue->storage must be visible after read from
++ * queue->write
++ */
++ smp_rmb();
++
++ return queue->storage[queue->read & (queue->size - 1)];
++}
++
++VCHIQ_HEADER_T *vchiu_queue_pop(VCHIU_QUEUE_T *queue)
++{
++ VCHIQ_HEADER_T *header;
++
++ while (queue->write == queue->read) {
++ if (down_interruptible(&queue->push) != 0) {
++ flush_signals(current);
++ }
++ }
++
++ /*
++ * Read from queue->storage must be visible after read from
++ * queue->write
++ */
++ smp_rmb();
++
++ header = queue->storage[queue->read & (queue->size - 1)];
++
++ /*
++ * Read from queue->storage must be visible before write to
++ * queue->read
++ */
++ smp_mb();
++
++ queue->read++;
++
++ up(&queue->pop);
++
++ return header;
++}
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.h b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.h
+new file mode 100644
+index 0000000..f4d0b66
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.h
+@@ -0,0 +1,81 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++#ifndef VCHIQ_UTIL_H
++#define VCHIQ_UTIL_H
++
++#include <linux/types.h>
++#include <linux/semaphore.h>
++#include <linux/mutex.h>
++#include <linux/bitops.h>
++#include <linux/kthread.h>
++#include <linux/wait.h>
++#include <linux/vmalloc.h>
++#include <linux/jiffies.h>
++#include <linux/delay.h>
++#include <linux/string.h>
++#include <linux/types.h>
++#include <linux/interrupt.h>
++#include <linux/random.h>
++#include <linux/sched.h>
++#include <linux/ctype.h>
++#include <linux/uaccess.h>
++#include <linux/time.h> /* for time_t */
++#include <linux/slab.h>
++#include <linux/vmalloc.h>
++
++#include "vchiq_if.h"
++
++typedef struct {
++ int size;
++ int read;
++ int write;
++
++ struct semaphore pop;
++ struct semaphore push;
++
++ VCHIQ_HEADER_T **storage;
++} VCHIU_QUEUE_T;
++
++extern int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size);
++extern void vchiu_queue_delete(VCHIU_QUEUE_T *queue);
++
++extern int vchiu_queue_is_empty(VCHIU_QUEUE_T *queue);
++extern int vchiu_queue_is_full(VCHIU_QUEUE_T *queue);
++
++extern void vchiu_queue_push(VCHIU_QUEUE_T *queue, VCHIQ_HEADER_T *header);
++
++extern VCHIQ_HEADER_T *vchiu_queue_peek(VCHIU_QUEUE_T *queue);
++extern VCHIQ_HEADER_T *vchiu_queue_pop(VCHIU_QUEUE_T *queue);
++
++#endif
+diff --git a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_version.c b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_version.c
+new file mode 100644
+index 0000000..b6bfa21
+--- /dev/null
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_version.c
+@@ -0,0 +1,59 @@
++/**
++ * Copyright (c) 2010-2012 Broadcom. All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without
++ * modification, are permitted provided that the following conditions
++ * are met:
++ * 1. Redistributions of source code must retain the above copyright
++ * notice, this list of conditions, and the following disclaimer,
++ * without modification.
++ * 2. Redistributions in binary form must reproduce the above copyright
++ * notice, this list of conditions and the following disclaimer in the
++ * documentation and/or other materials provided with the distribution.
++ * 3. The names of the above-listed copyright holders may not be used
++ * to endorse or promote products derived from this software without
++ * specific prior written permission.
++ *
++ * ALTERNATIVELY, this software may be distributed under the terms of the
++ * GNU General Public License ("GPL") version 2, as published by the Free
++ * Software Foundation.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++#include "vchiq_build_info.h"
++#include <linux/broadcom/vc_debug_sym.h>
++
++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_hostname, "dc4-arm-01" );
++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_version, "9245b4c35b99b3870e1f7dc598c5692b3c66a6f0 (tainted)" );
++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_time, __TIME__ );
++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_date, __DATE__ );
++
++const char *vchiq_get_build_hostname( void )
++{
++ return vchiq_build_hostname;
++}
++
++const char *vchiq_get_build_version( void )
++{
++ return vchiq_build_version;
++}
++
++const char *vchiq_get_build_date( void )
++{
++ return vchiq_build_date;
++}
++
++const char *vchiq_get_build_time( void )
++{
++ return vchiq_build_time;
++}
+--
+1.8.3.2
+
projects / 15.05 / openwrt.git / blobdiff