--- /dev/null
+Platforms will now have to supply a function dma_device_is_coherent which
+returns if a particular device participates in the coherence domain. For
+most platforms this function will always return 0 or 1.
+
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+diff -urN linux.old/arch/mips/Kconfig linux.dev/arch/mips/Kconfig
+--- linux.old/arch/mips/Kconfig 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/Kconfig 2007-02-09 20:26:45.367388152 +0100
+@@ -571,8 +571,6 @@
+ select ARC
+ select ARC32
+ select BOOT_ELF32
+- select OWN_DMA
+- select DMA_IP32
+ select DMA_NONCOHERENT
+ select HW_HAS_PCI
+ select R5000_CPU_SCACHE
+@@ -835,9 +833,6 @@
+ config DMA_NEED_PCI_MAP_STATE
+ bool
+
+-config OWN_DMA
+- bool
+-
+ config EARLY_PRINTK
+ bool
+
+diff -urN linux.old/arch/mips/mm/dma-coherent.c linux.dev/arch/mips/mm/dma-coherent.c
+--- linux.old/arch/mips/mm/dma-coherent.c 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/mm/dma-coherent.c 1970-01-01 01:00:00.000000000 +0100
+@@ -1,254 +0,0 @@
+-/*
+- * This file is subject to the terms and conditions of the GNU General Public
+- * License. See the file "COPYING" in the main directory of this archive
+- * for more details.
+- *
+- * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
+- * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
+- * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+- */
+-#include <linux/types.h>
+-#include <linux/dma-mapping.h>
+-#include <linux/mm.h>
+-#include <linux/module.h>
+-#include <linux/string.h>
+-
+-#include <asm/cache.h>
+-#include <asm/io.h>
+-
+-void *dma_alloc_noncoherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+-{
+- void *ret;
+- /* ignore region specifiers */
+- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+-
+- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+- gfp |= GFP_DMA;
+- ret = (void *) __get_free_pages(gfp, get_order(size));
+-
+- if (ret != NULL) {
+- memset(ret, 0, size);
+- *dma_handle = virt_to_phys(ret);
+- }
+-
+- return ret;
+-}
+-
+-EXPORT_SYMBOL(dma_alloc_noncoherent);
+-
+-void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+- __attribute__((alias("dma_alloc_noncoherent")));
+-
+-EXPORT_SYMBOL(dma_alloc_coherent);
+-
+-void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle)
+-{
+- unsigned long addr = (unsigned long) vaddr;
+-
+- free_pages(addr, get_order(size));
+-}
+-
+-EXPORT_SYMBOL(dma_free_noncoherent);
+-
+-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));
+-
+-EXPORT_SYMBOL(dma_free_coherent);
+-
+-dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-
+- return __pa(ptr);
+-}
+-
+-EXPORT_SYMBOL(dma_map_single);
+-
+-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_single);
+-
+-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- for (i = 0; i < nents; i++, sg++) {
+- sg->dma_address = (dma_addr_t)page_to_phys(sg->page) + sg->offset;
+- }
+-
+- return nents;
+-}
+-
+-EXPORT_SYMBOL(dma_map_sg);
+-
+-dma_addr_t dma_map_page(struct device *dev, struct page *page,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-
+- return page_to_phys(page) + offset;
+-}
+-
+-EXPORT_SYMBOL(dma_map_page);
+-
+-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_page);
+-
+-void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_sg);
+-
+-void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- size_t size, enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_cpu);
+-
+-void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+- size_t size, enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_device);
+-
+-void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+-
+-void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_device);
+-
+-void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+-
+-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_device);
+-
+-int dma_mapping_error(dma_addr_t dma_addr)
+-{
+- return 0;
+-}
+-
+-EXPORT_SYMBOL(dma_mapping_error);
+-
+-int dma_supported(struct device *dev, u64 mask)
+-{
+- /*
+- * we fall back to GFP_DMA when the mask isn't all 1s,
+- * so we can't guarantee allocations that must be
+- * within a tighter range than GFP_DMA..
+- */
+- if (mask < 0x00ffffff)
+- return 0;
+-
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_supported);
+-
+-int dma_is_consistent(dma_addr_t dma_addr)
+-{
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_is_consistent);
+-
+-void dma_cache_sync(void *vaddr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_cache_sync);
+-
+-/* The DAC routines are a PCIism.. */
+-
+-#ifdef CONFIG_PCI
+-
+-#include <linux/pci.h>
+-
+-dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
+- struct page *page, unsigned long offset, int direction)
+-{
+- return (dma64_addr_t)page_to_phys(page) + offset;
+-}
+-
+-EXPORT_SYMBOL(pci_dac_page_to_dma);
+-
+-struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
+- dma64_addr_t dma_addr)
+-{
+- return mem_map + (dma_addr >> PAGE_SHIFT);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_to_page);
+-
+-unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
+- dma64_addr_t dma_addr)
+-{
+- return dma_addr & ~PAGE_MASK;
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_to_offset);
+-
+-void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
+- dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- BUG_ON(direction == PCI_DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
+-
+-void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
+- dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- BUG_ON(direction == PCI_DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
+-
+-#endif /* CONFIG_PCI */
+diff -urN linux.old/arch/mips/mm/dma-default.c linux.dev/arch/mips/mm/dma-default.c
+--- linux.old/arch/mips/mm/dma-default.c 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/arch/mips/mm/dma-default.c 2007-02-09 20:26:48.671885792 +0100
+@@ -0,0 +1,363 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
++ * Copyright (C) 2000, 2001, 06 Ralf Baechle <ralf@linux-mips.org>
++ * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
++ */
++
++#include <linux/types.h>
++#include <linux/dma-mapping.h>
++#include <linux/mm.h>
++#include <linux/module.h>
++#include <linux/string.h>
++
++#include <asm/cache.h>
++#include <asm/io.h>
++
++#include <dma-coherence.h>
++
++/*
++ * Warning on the terminology - Linux calls an uncached area coherent;
++ * MIPS terminology calls memory areas with hardware maintained coherency
++ * coherent.
++ */
++
++static inline int cpu_is_noncoherent_r10000(struct device *dev)
++{
++ return !plat_device_is_coherent(dev) &&
++ (current_cpu_data.cputype == CPU_R10000 &&
++ current_cpu_data.cputype == CPU_R12000);
++}
++
++void *dma_alloc_noncoherent(struct device *dev, size_t size,
++ dma_addr_t * dma_handle, gfp_t gfp)
++{
++ void *ret;
++
++ /* ignore region specifiers */
++ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
++
++ if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
++ gfp |= GFP_DMA;
++ ret = (void *) __get_free_pages(gfp, get_order(size));
++
++ if (ret != NULL) {
++ memset(ret, 0, size);
++ *dma_handle = plat_map_dma_mem(dev, ret, size);
++ }
++
++ return ret;
++}
++
++EXPORT_SYMBOL(dma_alloc_noncoherent);
++
++void *dma_alloc_coherent(struct device *dev, size_t size,
++ dma_addr_t * dma_handle, gfp_t gfp)
++{
++ void *ret;
++
++ /* ignore region specifiers */
++ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
++
++ if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
++ gfp |= GFP_DMA;
++ ret = (void *) __get_free_pages(gfp, get_order(size));
++
++ if (ret) {
++ memset(ret, 0, size);
++ *dma_handle = plat_map_dma_mem(dev, ret, size);
++
++ if (!plat_device_is_coherent(dev)) {
++ dma_cache_wback_inv((unsigned long) ret, size);
++ ret = UNCAC_ADDR(ret);
++ }
++ }
++
++ return ret;
++}
++
++EXPORT_SYMBOL(dma_alloc_coherent);
++
++void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
++ dma_addr_t dma_handle)
++{
++ free_pages((unsigned long) vaddr, get_order(size));
++}
++
++EXPORT_SYMBOL(dma_free_noncoherent);
++
++void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
++ dma_addr_t dma_handle)
++{
++ unsigned long addr = (unsigned long) vaddr;
++
++ if (!plat_device_is_coherent(dev))
++ addr = CAC_ADDR(addr);
++
++ free_pages(addr, get_order(size));
++}
++
++EXPORT_SYMBOL(dma_free_coherent);
++
++static inline void __dma_sync(unsigned long addr, size_t size,
++ enum dma_data_direction direction)
++{
++ switch (direction) {
++ case DMA_TO_DEVICE:
++ dma_cache_wback(addr, size);
++ break;
++
++ case DMA_FROM_DEVICE:
++ dma_cache_inv(addr, size);
++ break;
++
++ case DMA_BIDIRECTIONAL:
++ dma_cache_wback_inv(addr, size);
++ break;
++
++ default:
++ BUG();
++ }
++}
++
++dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
++ enum dma_data_direction direction)
++{
++ unsigned long addr = (unsigned long) ptr;
++
++ if (!plat_device_is_coherent(dev))
++ __dma_sync(addr, size, direction);
++
++ return plat_map_dma_mem(dev, ptr, size);
++}
++
++EXPORT_SYMBOL(dma_map_single);
++
++void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
++ enum dma_data_direction direction)
++{
++ if (cpu_is_noncoherent_r10000(dev))
++ __dma_sync(plat_dma_addr_to_phys(dma_addr) + PAGE_OFFSET, size,
++ direction);
++
++ plat_unmap_dma_mem(dma_addr);
++}
++
++EXPORT_SYMBOL(dma_unmap_single);
++
++int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
++ enum dma_data_direction direction)
++{
++ int i;
++
++ BUG_ON(direction == DMA_NONE);
++
++ for (i = 0; i < nents; i++, sg++) {
++ unsigned long addr;
++
++ addr = (unsigned long) page_address(sg->page);
++ if (!plat_device_is_coherent(dev) && addr)
++ __dma_sync(addr + sg->offset, sg->length, direction);
++ sg->dma_address = plat_map_dma_mem_page(dev, sg->page) +
++ sg->offset;
++ }
++
++ return nents;
++}
++
++EXPORT_SYMBOL(dma_map_sg);
++
++dma_addr_t dma_map_page(struct device *dev, struct page *page,
++ unsigned long offset, size_t size, enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (!plat_device_is_coherent(dev)) {
++ unsigned long addr;
++
++ addr = (unsigned long) page_address(page) + offset;
++ dma_cache_wback_inv(addr, size);
++ }
++
++ return plat_map_dma_mem_page(dev, page) + offset;
++}
++
++EXPORT_SYMBOL(dma_map_page);
++
++void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
++ enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (!plat_device_is_coherent(dev) && direction != DMA_TO_DEVICE) {
++ unsigned long addr;
++
++ addr = plat_dma_addr_to_phys(dma_address);
++ dma_cache_wback_inv(addr, size);
++ }
++
++ plat_unmap_dma_mem(dma_address);
++}
++
++EXPORT_SYMBOL(dma_unmap_page);
++
++void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
++ enum dma_data_direction direction)
++{
++ unsigned long addr;
++ int i;
++
++ BUG_ON(direction == DMA_NONE);
++
++ for (i = 0; i < nhwentries; i++, sg++) {
++ if (!plat_device_is_coherent(dev) &&
++ direction != DMA_TO_DEVICE) {
++ addr = (unsigned long) page_address(sg->page);
++ if (addr)
++ __dma_sync(addr + sg->offset, sg->length,
++ direction);
++ }
++ plat_unmap_dma_mem(sg->dma_address);
++ }
++}
++
++EXPORT_SYMBOL(dma_unmap_sg);
++
++void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
++ size_t size, enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (cpu_is_noncoherent_r10000(dev)) {
++ unsigned long addr;
++
++ addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);
++ __dma_sync(addr, size, direction);
++ }
++}
++
++EXPORT_SYMBOL(dma_sync_single_for_cpu);
++
++void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
++ size_t size, enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (cpu_is_noncoherent_r10000(dev)) {
++ unsigned long addr;
++
++ addr = plat_dma_addr_to_phys(dma_handle);
++ __dma_sync(addr, size, direction);
++ }
++}
++
++EXPORT_SYMBOL(dma_sync_single_for_device);
++
++void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
++ unsigned long offset, size_t size, enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (cpu_is_noncoherent_r10000(dev)) {
++ unsigned long addr;
++
++ addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);
++ __dma_sync(addr + offset, size, direction);
++ }
++}
++
++EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
++
++void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
++ unsigned long offset, size_t size, enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (cpu_is_noncoherent_r10000(dev)) {
++ unsigned long addr;
++
++ addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);
++ __dma_sync(addr + offset, size, direction);
++ }
++}
++
++EXPORT_SYMBOL(dma_sync_single_range_for_device);
++
++void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
++ enum dma_data_direction direction)
++{
++ int i;
++
++ BUG_ON(direction == DMA_NONE);
++
++ /* Make sure that gcc doesn't leave the empty loop body. */
++ for (i = 0; i < nelems; i++, sg++) {
++ if (!plat_device_is_coherent(dev))
++ __dma_sync((unsigned long)page_address(sg->page),
++ sg->length, direction);
++ plat_unmap_dma_mem(sg->dma_address);
++ }
++}
++
++EXPORT_SYMBOL(dma_sync_sg_for_cpu);
++
++void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
++ enum dma_data_direction direction)
++{
++ int i;
++
++ BUG_ON(direction == DMA_NONE);
++
++ /* Make sure that gcc doesn't leave the empty loop body. */
++ for (i = 0; i < nelems; i++, sg++) {
++ if (!plat_device_is_coherent(dev))
++ __dma_sync((unsigned long)page_address(sg->page),
++ sg->length, direction);
++ plat_unmap_dma_mem(sg->dma_address);
++ }
++}
++
++EXPORT_SYMBOL(dma_sync_sg_for_device);
++
++int dma_mapping_error(dma_addr_t dma_addr)
++{
++ return 0;
++}
++
++EXPORT_SYMBOL(dma_mapping_error);
++
++int dma_supported(struct device *dev, u64 mask)
++{
++ /*
++ * we fall back to GFP_DMA when the mask isn't all 1s,
++ * so we can't guarantee allocations that must be
++ * within a tighter range than GFP_DMA..
++ */
++ if (mask < 0x00ffffff)
++ return 0;
++
++ return 1;
++}
++
++EXPORT_SYMBOL(dma_supported);
++
++int dma_is_consistent(dma_addr_t dma_addr)
++{
++ return plat_device_is_coherent(NULL);
++}
++
++EXPORT_SYMBOL(dma_is_consistent);
++
++void dma_cache_sync(void *vaddr, size_t size,
++ enum dma_data_direction direction)
++{
++ BUG_ON(direction == DMA_NONE);
++
++ if (!plat_device_is_coherent(NULL))
++ dma_cache_wback_inv((unsigned long)vaddr, size);
++}
++
++EXPORT_SYMBOL(dma_cache_sync);
+diff -urN linux.old/arch/mips/mm/dma-ip27.c linux.dev/arch/mips/mm/dma-ip27.c
+--- linux.old/arch/mips/mm/dma-ip27.c 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/mm/dma-ip27.c 1970-01-01 01:00:00.000000000 +0100
+@@ -1,257 +0,0 @@
+-/*
+- * This file is subject to the terms and conditions of the GNU General Public
+- * License. See the file "COPYING" in the main directory of this archive
+- * for more details.
+- *
+- * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
+- * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
+- * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+- */
+-#include <linux/types.h>
+-#include <linux/mm.h>
+-#include <linux/module.h>
+-#include <linux/string.h>
+-#include <linux/pci.h>
+-
+-#include <asm/cache.h>
+-#include <asm/pci/bridge.h>
+-
+-#define pdev_to_baddr(pdev, addr) \
+- (BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr))
+-#define dev_to_baddr(dev, addr) \
+- pdev_to_baddr(to_pci_dev(dev), (addr))
+-
+-void *dma_alloc_noncoherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+-{
+- void *ret;
+-
+- /* ignore region specifiers */
+- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+-
+- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+- gfp |= GFP_DMA;
+- ret = (void *) __get_free_pages(gfp, get_order(size));
+-
+- if (ret != NULL) {
+- memset(ret, 0, size);
+- *dma_handle = dev_to_baddr(dev, virt_to_phys(ret));
+- }
+-
+- return ret;
+-}
+-
+-EXPORT_SYMBOL(dma_alloc_noncoherent);
+-
+-void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+- __attribute__((alias("dma_alloc_noncoherent")));
+-
+-EXPORT_SYMBOL(dma_alloc_coherent);
+-
+-void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle)
+-{
+- unsigned long addr = (unsigned long) vaddr;
+-
+- free_pages(addr, get_order(size));
+-}
+-
+-EXPORT_SYMBOL(dma_free_noncoherent);
+-
+-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));
+-
+-EXPORT_SYMBOL(dma_free_coherent);
+-
+-dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-
+- return dev_to_baddr(dev, __pa(ptr));
+-}
+-
+-EXPORT_SYMBOL(dma_map_single);
+-
+-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_single);
+-
+-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- for (i = 0; i < nents; i++, sg++) {
+- sg->dma_address = (dma_addr_t) dev_to_baddr(dev,
+- page_to_phys(sg->page) + sg->offset);
+- }
+-
+- return nents;
+-}
+-
+-EXPORT_SYMBOL(dma_map_sg);
+-
+-dma_addr_t dma_map_page(struct device *dev, struct page *page,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-
+- return dev_to_baddr(dev, page_to_phys(page) + offset);
+-}
+-
+-EXPORT_SYMBOL(dma_map_page);
+-
+-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_page);
+-
+-void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_sg);
+-
+-void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_cpu);
+-
+-void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_device);
+-
+-void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+-
+-void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_device);
+-
+-void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+-
+-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_device);
+-
+-int dma_mapping_error(dma_addr_t dma_addr)
+-{
+- return 0;
+-}
+-
+-EXPORT_SYMBOL(dma_mapping_error);
+-
+-int dma_supported(struct device *dev, u64 mask)
+-{
+- /*
+- * we fall back to GFP_DMA when the mask isn't all 1s,
+- * so we can't guarantee allocations that must be
+- * within a tighter range than GFP_DMA..
+- */
+- if (mask < 0x00ffffff)
+- return 0;
+-
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_supported);
+-
+-int dma_is_consistent(dma_addr_t dma_addr)
+-{
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_is_consistent);
+-
+-void dma_cache_sync(void *vaddr, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(dma_cache_sync);
+-
+-dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
+- struct page *page, unsigned long offset, int direction)
+-{
+- dma64_addr_t addr = page_to_phys(page) + offset;
+-
+- return (dma64_addr_t) pdev_to_baddr(pdev, addr);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_page_to_dma);
+-
+-struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
+- dma64_addr_t dma_addr)
+-{
+- struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus);
+-
+- return pfn_to_page((dma_addr - bc->baddr) >> PAGE_SHIFT);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_to_page);
+-
+-unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
+- dma64_addr_t dma_addr)
+-{
+- return dma_addr & ~PAGE_MASK;
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_to_offset);
+-
+-void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
+- dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- BUG_ON(direction == PCI_DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
+-
+-void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
+- dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- BUG_ON(direction == PCI_DMA_NONE);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
+diff -urN linux.old/arch/mips/mm/dma-ip32.c linux.dev/arch/mips/mm/dma-ip32.c
+--- linux.old/arch/mips/mm/dma-ip32.c 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/mm/dma-ip32.c 1970-01-01 01:00:00.000000000 +0100
+@@ -1,382 +0,0 @@
+-/*
+- * This file is subject to the terms and conditions of the GNU General Public
+- * License. See the file "COPYING" in the main directory of this archive
+- * for more details.
+- *
+- * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
+- * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
+- * Copyright (C) 2005 Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com>
+- * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+- * IP32 changes by Ilya.
+- */
+-#include <linux/types.h>
+-#include <linux/mm.h>
+-#include <linux/module.h>
+-#include <linux/string.h>
+-#include <linux/dma-mapping.h>
+-
+-#include <asm/cache.h>
+-#include <asm/io.h>
+-#include <asm/ip32/crime.h>
+-
+-/*
+- * Warning on the terminology - Linux calls an uncached area coherent;
+- * MIPS terminology calls memory areas with hardware maintained coherency
+- * coherent.
+- */
+-
+-/*
+- * Few notes.
+- * 1. CPU sees memory as two chunks: 0-256M@0x0, and the rest @0x40000000+256M
+- * 2. PCI sees memory as one big chunk @0x0 (or we could use 0x40000000 for native-endian)
+- * 3. All other devices see memory as one big chunk at 0x40000000
+- * 4. Non-PCI devices will pass NULL as struct device*
+- * Thus we translate differently, depending on device.
+- */
+-
+-#define RAM_OFFSET_MASK 0x3fffffff
+-
+-void *dma_alloc_noncoherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+-{
+- void *ret;
+- /* ignore region specifiers */
+- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+-
+- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+- gfp |= GFP_DMA;
+- ret = (void *) __get_free_pages(gfp, get_order(size));
+-
+- if (ret != NULL) {
+- unsigned long addr = virt_to_phys(ret)&RAM_OFFSET_MASK;
+- memset(ret, 0, size);
+- if(dev==NULL)
+- addr+= CRIME_HI_MEM_BASE;
+- *dma_handle = addr;
+- }
+-
+- return ret;
+-}
+-
+-EXPORT_SYMBOL(dma_alloc_noncoherent);
+-
+-void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+-{
+- void *ret;
+-
+- ret = dma_alloc_noncoherent(dev, size, dma_handle, gfp);
+- if (ret) {
+- dma_cache_wback_inv((unsigned long) ret, size);
+- ret = UNCAC_ADDR(ret);
+- }
+-
+- return ret;
+-}
+-
+-EXPORT_SYMBOL(dma_alloc_coherent);
+-
+-void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle)
+-{
+- free_pages((unsigned long) vaddr, get_order(size));
+-}
+-
+-EXPORT_SYMBOL(dma_free_noncoherent);
+-
+-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle)
+-{
+- unsigned long addr = (unsigned long) vaddr;
+-
+- addr = CAC_ADDR(addr);
+- free_pages(addr, get_order(size));
+-}
+-
+-EXPORT_SYMBOL(dma_free_coherent);
+-
+-static inline void __dma_sync(unsigned long addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- switch (direction) {
+- case DMA_TO_DEVICE:
+- dma_cache_wback(addr, size);
+- break;
+-
+- case DMA_FROM_DEVICE:
+- dma_cache_inv(addr, size);
+- break;
+-
+- case DMA_BIDIRECTIONAL:
+- dma_cache_wback_inv(addr, size);
+- break;
+-
+- default:
+- BUG();
+- }
+-}
+-
+-dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+- enum dma_data_direction direction)
+-{
+- unsigned long addr = (unsigned long) ptr;
+-
+- switch (direction) {
+- case DMA_TO_DEVICE:
+- dma_cache_wback(addr, size);
+- break;
+-
+- case DMA_FROM_DEVICE:
+- dma_cache_inv(addr, size);
+- break;
+-
+- case DMA_BIDIRECTIONAL:
+- dma_cache_wback_inv(addr, size);
+- break;
+-
+- default:
+- BUG();
+- }
+-
+- addr = virt_to_phys(ptr)&RAM_OFFSET_MASK;
+- if(dev == NULL)
+- addr+=CRIME_HI_MEM_BASE;
+- return (dma_addr_t)addr;
+-}
+-
+-EXPORT_SYMBOL(dma_map_single);
+-
+-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- switch (direction) {
+- case DMA_TO_DEVICE:
+- break;
+-
+- case DMA_FROM_DEVICE:
+- break;
+-
+- case DMA_BIDIRECTIONAL:
+- break;
+-
+- default:
+- BUG();
+- }
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_single);
+-
+-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- for (i = 0; i < nents; i++, sg++) {
+- unsigned long addr;
+-
+- addr = (unsigned long) page_address(sg->page)+sg->offset;
+- if (addr)
+- __dma_sync(addr, sg->length, direction);
+- addr = __pa(addr)&RAM_OFFSET_MASK;
+- if(dev == NULL)
+- addr += CRIME_HI_MEM_BASE;
+- sg->dma_address = (dma_addr_t)addr;
+- }
+-
+- return nents;
+-}
+-
+-EXPORT_SYMBOL(dma_map_sg);
+-
+-dma_addr_t dma_map_page(struct device *dev, struct page *page,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- addr = (unsigned long) page_address(page) + offset;
+- dma_cache_wback_inv(addr, size);
+- addr = __pa(addr)&RAM_OFFSET_MASK;
+- if(dev == NULL)
+- addr += CRIME_HI_MEM_BASE;
+-
+- return (dma_addr_t)addr;
+-}
+-
+-EXPORT_SYMBOL(dma_map_page);
+-
+-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-
+- if (direction != DMA_TO_DEVICE) {
+- unsigned long addr;
+-
+- dma_address&=RAM_OFFSET_MASK;
+- addr = dma_address + PAGE_OFFSET;
+- if(dma_address>=256*1024*1024)
+- addr+=CRIME_HI_MEM_BASE;
+- dma_cache_wback_inv(addr, size);
+- }
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_page);
+-
+-void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+- enum dma_data_direction direction)
+-{
+- unsigned long addr;
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- if (direction == DMA_TO_DEVICE)
+- return;
+-
+- for (i = 0; i < nhwentries; i++, sg++) {
+- addr = (unsigned long) page_address(sg->page);
+- if (!addr)
+- continue;
+- dma_cache_wback_inv(addr + sg->offset, sg->length);
+- }
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_sg);
+-
+-void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- dma_handle&=RAM_OFFSET_MASK;
+- addr = dma_handle + PAGE_OFFSET;
+- if(dma_handle>=256*1024*1024)
+- addr+=CRIME_HI_MEM_BASE;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_cpu);
+-
+-void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+- size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- dma_handle&=RAM_OFFSET_MASK;
+- addr = dma_handle + PAGE_OFFSET;
+- if(dma_handle>=256*1024*1024)
+- addr+=CRIME_HI_MEM_BASE;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_device);
+-
+-void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- dma_handle&=RAM_OFFSET_MASK;
+- addr = dma_handle + offset + PAGE_OFFSET;
+- if(dma_handle>=256*1024*1024)
+- addr+=CRIME_HI_MEM_BASE;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+-
+-void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- dma_handle&=RAM_OFFSET_MASK;
+- addr = dma_handle + offset + PAGE_OFFSET;
+- if(dma_handle>=256*1024*1024)
+- addr+=CRIME_HI_MEM_BASE;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_device);
+-
+-void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- /* Make sure that gcc doesn't leave the empty loop body. */
+- for (i = 0; i < nelems; i++, sg++)
+- __dma_sync((unsigned long)page_address(sg->page),
+- sg->length, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+-
+-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- /* Make sure that gcc doesn't leave the empty loop body. */
+- for (i = 0; i < nelems; i++, sg++)
+- __dma_sync((unsigned long)page_address(sg->page),
+- sg->length, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_device);
+-
+-int dma_mapping_error(dma_addr_t dma_addr)
+-{
+- return 0;
+-}
+-
+-EXPORT_SYMBOL(dma_mapping_error);
+-
+-int dma_supported(struct device *dev, u64 mask)
+-{
+- /*
+- * we fall back to GFP_DMA when the mask isn't all 1s,
+- * so we can't guarantee allocations that must be
+- * within a tighter range than GFP_DMA..
+- */
+- if (mask < 0x00ffffff)
+- return 0;
+-
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_supported);
+-
+-int dma_is_consistent(dma_addr_t dma_addr)
+-{
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_is_consistent);
+-
+-void dma_cache_sync(void *vaddr, size_t size, enum dma_data_direction direction)
+-{
+- if (direction == DMA_NONE)
+- return;
+-
+- dma_cache_wback_inv((unsigned long)vaddr, size);
+-}
+-
+-EXPORT_SYMBOL(dma_cache_sync);
+-
+diff -urN linux.old/arch/mips/mm/dma-noncoherent.c linux.dev/arch/mips/mm/dma-noncoherent.c
+--- linux.old/arch/mips/mm/dma-noncoherent.c 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/mm/dma-noncoherent.c 1970-01-01 01:00:00.000000000 +0100
+@@ -1,369 +0,0 @@
+-/*
+- * This file is subject to the terms and conditions of the GNU General Public
+- * License. See the file "COPYING" in the main directory of this archive
+- * for more details.
+- *
+- * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
+- * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
+- * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+- */
+-#include <linux/types.h>
+-#include <linux/mm.h>
+-#include <linux/module.h>
+-#include <linux/string.h>
+-#include <linux/dma-mapping.h>
+-
+-#include <asm/cache.h>
+-#include <asm/io.h>
+-
+-/*
+- * Warning on the terminology - Linux calls an uncached area coherent;
+- * MIPS terminology calls memory areas with hardware maintained coherency
+- * coherent.
+- */
+-
+-void *dma_alloc_noncoherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+-{
+- void *ret;
+- /* ignore region specifiers */
+- gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+-
+- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+- gfp |= GFP_DMA;
+- ret = (void *) __get_free_pages(gfp, get_order(size));
+-
+- if (ret != NULL) {
+- memset(ret, 0, size);
+- *dma_handle = virt_to_phys(ret);
+- }
+-
+- return ret;
+-}
+-
+-EXPORT_SYMBOL(dma_alloc_noncoherent);
+-
+-void *dma_alloc_coherent(struct device *dev, size_t size,
+- dma_addr_t * dma_handle, gfp_t gfp)
+-{
+- void *ret;
+-
+- ret = dma_alloc_noncoherent(dev, size, dma_handle, gfp);
+- if (ret) {
+- dma_cache_wback_inv((unsigned long) ret, size);
+- ret = UNCAC_ADDR(ret);
+- }
+-
+- return ret;
+-}
+-
+-EXPORT_SYMBOL(dma_alloc_coherent);
+-
+-void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle)
+-{
+- free_pages((unsigned long) vaddr, get_order(size));
+-}
+-
+-EXPORT_SYMBOL(dma_free_noncoherent);
+-
+-void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+- dma_addr_t dma_handle)
+-{
+- unsigned long addr = (unsigned long) vaddr;
+-
+- addr = CAC_ADDR(addr);
+- free_pages(addr, get_order(size));
+-}
+-
+-EXPORT_SYMBOL(dma_free_coherent);
+-
+-static inline void __dma_sync(unsigned long addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- switch (direction) {
+- case DMA_TO_DEVICE:
+- dma_cache_wback(addr, size);
+- break;
+-
+- case DMA_FROM_DEVICE:
+- dma_cache_inv(addr, size);
+- break;
+-
+- case DMA_BIDIRECTIONAL:
+- dma_cache_wback_inv(addr, size);
+- break;
+-
+- default:
+- BUG();
+- }
+-}
+-
+-dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+- enum dma_data_direction direction)
+-{
+- unsigned long addr = (unsigned long) ptr;
+-
+- __dma_sync(addr, size, direction);
+-
+- return virt_to_phys(ptr);
+-}
+-
+-EXPORT_SYMBOL(dma_map_single);
+-
+-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+- enum dma_data_direction direction)
+-{
+- unsigned long addr;
+- addr = dma_addr + PAGE_OFFSET;
+-
+- //__dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_single);
+-
+-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- for (i = 0; i < nents; i++, sg++) {
+- unsigned long addr;
+-
+- addr = (unsigned long) page_address(sg->page);
+- if (addr) {
+- __dma_sync(addr + sg->offset, sg->length, direction);
+- sg->dma_address = (dma_addr_t)page_to_phys(sg->page)
+- + sg->offset;
+- }
+- }
+-
+- return nents;
+-}
+-
+-EXPORT_SYMBOL(dma_map_sg);
+-
+-dma_addr_t dma_map_page(struct device *dev, struct page *page,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- addr = (unsigned long) page_address(page) + offset;
+- dma_cache_wback_inv(addr, size);
+-
+- return page_to_phys(page) + offset;
+-}
+-
+-EXPORT_SYMBOL(dma_map_page);
+-
+-void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+- enum dma_data_direction direction)
+-{
+- BUG_ON(direction == DMA_NONE);
+-
+- if (direction != DMA_TO_DEVICE) {
+- unsigned long addr;
+-
+- addr = dma_address + PAGE_OFFSET;
+- dma_cache_wback_inv(addr, size);
+- }
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_page);
+-
+-void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+- enum dma_data_direction direction)
+-{
+- unsigned long addr;
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- if (direction == DMA_TO_DEVICE)
+- return;
+-
+- for (i = 0; i < nhwentries; i++, sg++) {
+- addr = (unsigned long) page_address(sg->page);
+- if (addr)
+- __dma_sync(addr + sg->offset, sg->length, direction);
+- }
+-}
+-
+-EXPORT_SYMBOL(dma_unmap_sg);
+-
+-void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- addr = dma_handle + PAGE_OFFSET;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_cpu);
+-
+-void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+- size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- addr = dma_handle + PAGE_OFFSET;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_for_device);
+-
+-void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- addr = dma_handle + offset + PAGE_OFFSET;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+-
+-void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+- unsigned long offset, size_t size, enum dma_data_direction direction)
+-{
+- unsigned long addr;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- addr = dma_handle + offset + PAGE_OFFSET;
+- __dma_sync(addr, size, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_single_range_for_device);
+-
+-void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- /* Make sure that gcc doesn't leave the empty loop body. */
+- for (i = 0; i < nelems; i++, sg++)
+- __dma_sync((unsigned long)page_address(sg->page),
+- sg->length, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+-
+-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+- enum dma_data_direction direction)
+-{
+- int i;
+-
+- BUG_ON(direction == DMA_NONE);
+-
+- /* Make sure that gcc doesn't leave the empty loop body. */
+- for (i = 0; i < nelems; i++, sg++)
+- __dma_sync((unsigned long)page_address(sg->page),
+- sg->length, direction);
+-}
+-
+-EXPORT_SYMBOL(dma_sync_sg_for_device);
+-
+-int dma_mapping_error(dma_addr_t dma_addr)
+-{
+- return 0;
+-}
+-
+-EXPORT_SYMBOL(dma_mapping_error);
+-
+-int dma_supported(struct device *dev, u64 mask)
+-{
+- /*
+- * we fall back to GFP_DMA when the mask isn't all 1s,
+- * so we can't guarantee allocations that must be
+- * within a tighter range than GFP_DMA..
+- */
+- if (mask < 0x00ffffff)
+- return 0;
+-
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_supported);
+-
+-int dma_is_consistent(dma_addr_t dma_addr)
+-{
+- return 1;
+-}
+-
+-EXPORT_SYMBOL(dma_is_consistent);
+-
+-void dma_cache_sync(void *vaddr, size_t size, enum dma_data_direction direction)
+-{
+- if (direction == DMA_NONE)
+- return;
+-
+- dma_cache_wback_inv((unsigned long)vaddr, size);
+-}
+-
+-EXPORT_SYMBOL(dma_cache_sync);
+-
+-/* The DAC routines are a PCIism.. */
+-
+-#ifdef CONFIG_PCI
+-
+-#include <linux/pci.h>
+-
+-dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
+- struct page *page, unsigned long offset, int direction)
+-{
+- return (dma64_addr_t)page_to_phys(page) + offset;
+-}
+-
+-EXPORT_SYMBOL(pci_dac_page_to_dma);
+-
+-struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
+- dma64_addr_t dma_addr)
+-{
+- return mem_map + (dma_addr >> PAGE_SHIFT);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_to_page);
+-
+-unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
+- dma64_addr_t dma_addr)
+-{
+- return dma_addr & ~PAGE_MASK;
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_to_offset);
+-
+-void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
+- dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- BUG_ON(direction == PCI_DMA_NONE);
+-
+- dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
+-
+-void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
+- dma64_addr_t dma_addr, size_t len, int direction)
+-{
+- BUG_ON(direction == PCI_DMA_NONE);
+-
+- dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
+-}
+-
+-EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
+-
+-#endif /* CONFIG_PCI */
+diff -urN linux.old/arch/mips/mm/Makefile linux.dev/arch/mips/mm/Makefile
+--- linux.old/arch/mips/mm/Makefile 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/mm/Makefile 2007-02-09 20:26:45.376386784 +0100
+@@ -2,8 +2,8 @@
+ # Makefile for the Linux/MIPS-specific parts of the memory manager.
+ #
+
+-obj-y += cache.o extable.o fault.o init.o pgtable.o \
+- tlbex.o tlbex-fault.o
++obj-y += cache.o dma-default.o extable.o fault.o \
++ init.o pgtable.o tlbex.o tlbex-fault.o
+
+ obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o
+ obj-$(CONFIG_64BIT) += pgtable-64.o
+@@ -32,14 +32,4 @@
+ obj-$(CONFIG_RM7000_CPU_SCACHE) += sc-rm7k.o
+ obj-$(CONFIG_MIPS_CPU_SCACHE) += sc-mips.o
+
+-#
+-# Choose one DMA coherency model
+-#
+-ifndef CONFIG_OWN_DMA
+-obj-$(CONFIG_DMA_COHERENT) += dma-coherent.o
+-obj-$(CONFIG_DMA_NONCOHERENT) += dma-noncoherent.o
+-endif
+-obj-$(CONFIG_DMA_IP27) += dma-ip27.o
+-obj-$(CONFIG_DMA_IP32) += dma-ip32.o
+-
+ EXTRA_AFLAGS := $(CFLAGS)
+diff -urN linux.old/arch/mips/pci/Makefile linux.dev/arch/mips/pci/Makefile
+--- linux.old/arch/mips/pci/Makefile 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/arch/mips/pci/Makefile 2007-02-09 20:26:50.961537712 +0100
+@@ -2,7 +2,7 @@
+ # Makefile for the PCI specific kernel interface routines under Linux.
+ #
+
+-obj-y += pci.o
++obj-y += pci.o pci-dac.o
+
+ #
+ # PCI bus host bridge specific code
+diff -urN linux.old/arch/mips/pci/pci-dac.c linux.dev/arch/mips/pci/pci-dac.c
+--- linux.old/arch/mips/pci/pci-dac.c 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/arch/mips/pci/pci-dac.c 2007-02-09 20:26:50.961537712 +0100
+@@ -0,0 +1,79 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
++ * Copyright (C) 2000, 2001, 06 Ralf Baechle <ralf@linux-mips.org>
++ * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
++ */
++
++#include <linux/types.h>
++#include <linux/dma-mapping.h>
++#include <linux/mm.h>
++#include <linux/module.h>
++#include <linux/string.h>
++
++#include <asm/cache.h>
++#include <asm/io.h>
++
++#include <dma-coherence.h>
++
++#include <linux/pci.h>
++
++dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
++ struct page *page, unsigned long offset, int direction)
++{
++ struct device *dev = &pdev->dev;
++
++ BUG_ON(direction == DMA_NONE);
++
++ if (!plat_device_is_coherent(dev)) {
++ unsigned long addr;
++
++ addr = (unsigned long) page_address(page) + offset;
++ dma_cache_wback_inv(addr, PAGE_SIZE);
++ }
++
++ return plat_map_dma_mem_page(dev, page) + offset;
++}
++
++EXPORT_SYMBOL(pci_dac_page_to_dma);
++
++struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
++ dma64_addr_t dma_addr)
++{
++ return pfn_to_page(plat_dma_addr_to_phys(dma_addr) >> PAGE_SHIFT);
++}
++
++EXPORT_SYMBOL(pci_dac_dma_to_page);
++
++unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
++ dma64_addr_t dma_addr)
++{
++ return dma_addr & ~PAGE_MASK;
++}
++
++EXPORT_SYMBOL(pci_dac_dma_to_offset);
++
++void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
++ dma64_addr_t dma_addr, size_t len, int direction)
++{
++ BUG_ON(direction == PCI_DMA_NONE);
++
++ if (!plat_device_is_coherent(&pdev->dev))
++ dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
++}
++
++EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
++
++void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
++ dma64_addr_t dma_addr, size_t len, int direction)
++{
++ BUG_ON(direction == PCI_DMA_NONE);
++
++ if (!plat_device_is_coherent(&pdev->dev))
++ dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
++}
++
++EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
+diff -urN linux.old/include/asm-mips/mach-generic/dma-coherence.h linux.dev/include/asm-mips/mach-generic/dma-coherence.h
+--- linux.old/include/asm-mips/mach-generic/dma-coherence.h 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/include/asm-mips/mach-generic/dma-coherence.h 2007-02-09 20:26:50.962537560 +0100
+@@ -0,0 +1,43 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
++ *
++ */
++#ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
++#define __ASM_MACH_GENERIC_DMA_COHERENCE_H
++
++struct device;
++
++static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
++{
++ return virt_to_phys(addr);
++}
++
++static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
++{
++ return page_to_phys(page);
++}
++
++static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
++{
++ return dma_addr;
++}
++
++static void plat_unmap_dma_mem(dma_addr_t dma_addr)
++{
++}
++
++static inline int plat_device_is_coherent(struct device *dev)
++{
++#ifdef CONFIG_DMA_COHERENT
++ return 1;
++#endif
++#ifdef CONFIG_DMA_NONCOHERENT
++ return 0;
++#endif
++}
++
++#endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */
+diff -urN linux.old/include/asm-mips/mach-generic/kmalloc.h linux.dev/include/asm-mips/mach-generic/kmalloc.h
+--- linux.old/include/asm-mips/mach-generic/kmalloc.h 2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/include/asm-mips/mach-generic/kmalloc.h 2007-02-09 20:26:50.962537560 +0100
+@@ -5,6 +5,7 @@
+ #ifndef CONFIG_DMA_COHERENT
+ /*
+ * Total overkill for most systems but need as a safe default.
++ * Set this one if any device in the system might do non-coherent DMA.
+ */
+ #define ARCH_KMALLOC_MINALIGN 128
+ #endif
+diff -urN linux.old/include/asm-mips/mach-ip27/dma-coherence.h linux.dev/include/asm-mips/mach-ip27/dma-coherence.h
+--- linux.old/include/asm-mips/mach-ip27/dma-coherence.h 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/include/asm-mips/mach-ip27/dma-coherence.h 2007-02-09 20:26:50.962537560 +0100
+@@ -0,0 +1,49 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
++ *
++ */
++#ifndef __ASM_MACH_IP27_DMA_COHERENCE_H
++#define __ASM_MACH_IP27_DMA_COHERENCE_H
++
++#include <asm/pci/bridge.h>
++
++#define pdev_to_baddr(pdev, addr) \
++ (BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr))
++#define dev_to_baddr(dev, addr) \
++ pdev_to_baddr(to_pci_dev(dev), (addr))
++
++struct device;
++
++static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
++{
++ dma_addr_t pa = dev_to_baddr(dev, virt_to_phys(addr));
++
++ return pa;
++}
++
++static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
++{
++ dma_addr_t pa = dev_to_baddr(dev, page_to_phys(page));
++
++ return pa;
++}
++
++static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
++{
++ return dma_addr & (0xffUL << 56);
++}
++
++static void plat_unmap_dma_mem(dma_addr_t dma_addr)
++{
++}
++
++static inline int plat_device_is_coherent(struct device *dev)
++{
++ return 1; /* IP27 non-cohernet mode is unsupported */
++}
++
++#endif /* __ASM_MACH_IP27_DMA_COHERENCE_H */
+diff -urN linux.old/include/asm-mips/mach-ip32/dma-coherence.h linux.dev/include/asm-mips/mach-ip32/dma-coherence.h
+--- linux.old/include/asm-mips/mach-ip32/dma-coherence.h 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/include/asm-mips/mach-ip32/dma-coherence.h 2007-02-09 20:26:50.963537408 +0100
+@@ -0,0 +1,71 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
++ *
++ */
++#ifndef __ASM_MACH_IP35_DMA_COHERENCE_H
++#define __ASM_MACH_IP35_DMA_COHERENCE_H
++
++#include <asm/ip32/crime.h>
++
++struct device;
++
++/*
++ * Few notes.
++ * 1. CPU sees memory as two chunks: 0-256M@0x0, and the rest @0x40000000+256M
++ * 2. PCI sees memory as one big chunk @0x0 (or we could use 0x40000000 for
++ * native-endian)
++ * 3. All other devices see memory as one big chunk at 0x40000000
++ * 4. Non-PCI devices will pass NULL as struct device*
++ *
++ * Thus we translate differently, depending on device.
++ */
++
++#define RAM_OFFSET_MASK 0x3fffffffUL
++
++static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
++{
++ dma_addr_t pa = virt_to_phys(addr) & RAM_OFFSET_MASK;
++
++ if (dev == NULL)
++ pa += CRIME_HI_MEM_BASE;
++
++ return pa;
++}
++
++static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
++{
++ dma_addr_t pa;
++
++ pa = page_to_phys(page) & RAM_OFFSET_MASK;
++
++ if (dev == NULL)
++ pa += CRIME_HI_MEM_BASE;
++
++ return pa;
++}
++
++/* This is almost certainly wrong but it's what dma-ip32.c used to use */
++static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
++{
++ unsigned long addr = dma_addr & RAM_OFFSET_MASK;
++
++ if (dma_addr >= 256*1024*1024)
++ addr += CRIME_HI_MEM_BASE;
++
++ return addr;
++}
++
++static void plat_unmap_dma_mem(dma_addr_t dma_addr)
++{
++}
++
++static inline int plat_device_is_coherent(struct device *dev)
++{
++ return 0; /* IP32 is non-cohernet */
++}
++
++#endif /* __ASM_MACH_IP35_DMA_COHERENCE_H */
+diff -urN linux.old/include/asm-mips/mach-jazz/dma-coherence.h linux.dev/include/asm-mips/mach-jazz/dma-coherence.h
+--- linux.old/include/asm-mips/mach-jazz/dma-coherence.h 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/include/asm-mips/mach-jazz/dma-coherence.h 2007-02-09 20:26:50.963537408 +0100
+@@ -0,0 +1,40 @@
++/*
++ * This file is subject to the terms and conditions of the GNU General Public
++ * License. See the file "COPYING" in the main directory of this archive
++ * for more details.
++ *
++ * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
++ */
++#ifndef __ASM_MACH_JAZZ_DMA_COHERENCE_H
++#define __ASM_MACH_JAZZ_DMA_COHERENCE_H
++
++#include <asm/jazzdma.h>
++
++struct device;
++
++static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
++{
++ return vdma_alloc(virt_to_phys(addr), size);
++}
++
++static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
++{
++ return vdma_alloc(page_to_phys(page), PAGE_SIZE);
++}
++
++static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
++{
++ return vdma_log2phys(dma_addr);
++}
++
++static void plat_unmap_dma_mem(dma_addr_t dma_addr)
++{
++ vdma_free(dma_addr);
++}
++
++static inline int plat_device_is_coherent(struct device *dev)
++{
++ return 0;
++}
++
++#endif /* __ASM_MACH_JAZZ_DMA_COHERENCE_H */
projects / openwrt.git / commitdiff