+++ /dev/null
-From e99a187b5c5f60fe55ca586f82ac1a3557fb166a Mon Sep 17 00:00:00 2001
-From: Ray Jui <rjui@broadcom.com>
-Date: Fri, 16 Oct 2015 08:18:24 -0500
-Subject: [PATCH 146/147] PCI: iproc: Add outbound mapping support
-
-Certain SoCs require the PCIe outbound mapping to be configured in
-software. Add support for those chips.
-
-[jonmason: Use %pap format when printing size_t to avoid warnings in 32-bit
-build.]
-[arnd: Use div64_u64() instead of "%" to avoid __aeabi_uldivmod link error
-in 32-bit build.]
-Signed-off-by: Ray Jui <rjui@broadcom.com>
-Signed-off-by: Jon Mason <jonmason@broadcom.com>
-Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
----
- drivers/pci/host/pcie-iproc-platform.c | 27 ++++++++
- drivers/pci/host/pcie-iproc.c | 115 +++++++++++++++++++++++++++++++++
- drivers/pci/host/pcie-iproc.h | 17 +++++
- 3 files changed, 159 insertions(+)
-
---- a/drivers/pci/host/pcie-iproc-platform.c
-+++ b/drivers/pci/host/pcie-iproc-platform.c
-@@ -54,6 +54,33 @@ static int iproc_pcie_pltfm_probe(struct
- return -ENOMEM;
- }
-
-+ if (of_property_read_bool(np, "brcm,pcie-ob")) {
-+ u32 val;
-+
-+ ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
-+ &val);
-+ if (ret) {
-+ dev_err(pcie->dev,
-+ "missing brcm,pcie-ob-axi-offset property\n");
-+ return ret;
-+ }
-+ pcie->ob.axi_offset = val;
-+
-+ ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
-+ &val);
-+ if (ret) {
-+ dev_err(pcie->dev,
-+ "missing brcm,pcie-ob-window-size property\n");
-+ return ret;
-+ }
-+ pcie->ob.window_size = (resource_size_t)val * SZ_1M;
-+
-+ if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
-+ pcie->ob.set_oarr_size = true;
-+
-+ pcie->need_ob_cfg = true;
-+ }
-+
- /* PHY use is optional */
- pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
- if (IS_ERR(pcie->phy)) {
---- a/drivers/pci/host/pcie-iproc.c
-+++ b/drivers/pci/host/pcie-iproc.c
-@@ -66,6 +66,18 @@
- #define PCIE_DL_ACTIVE_SHIFT 2
- #define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
-
-+#define OARR_VALID_SHIFT 0
-+#define OARR_VALID BIT(OARR_VALID_SHIFT)
-+#define OARR_SIZE_CFG_SHIFT 1
-+#define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
-+
-+#define OARR_LO(window) (0xd20 + (window) * 8)
-+#define OARR_HI(window) (0xd24 + (window) * 8)
-+#define OMAP_LO(window) (0xd40 + (window) * 8)
-+#define OMAP_HI(window) (0xd44 + (window) * 8)
-+
-+#define MAX_NUM_OB_WINDOWS 2
-+
- static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
- {
- struct iproc_pcie *pcie;
-@@ -212,6 +224,101 @@ static void iproc_pcie_enable(struct ipr
- writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN);
- }
-
-+/**
-+ * Some iProc SoCs require the SW to configure the outbound address mapping
-+ *
-+ * Outbound address translation:
-+ *
-+ * iproc_pcie_address = axi_address - axi_offset
-+ * OARR = iproc_pcie_address
-+ * OMAP = pci_addr
-+ *
-+ * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
-+ */
-+static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
-+ u64 pci_addr, resource_size_t size)
-+{
-+ struct iproc_pcie_ob *ob = &pcie->ob;
-+ unsigned i;
-+ u64 max_size = (u64)ob->window_size * MAX_NUM_OB_WINDOWS;
-+ u64 remainder;
-+
-+ if (size > max_size) {
-+ dev_err(pcie->dev,
-+ "res size 0x%pap exceeds max supported size 0x%llx\n",
-+ &size, max_size);
-+ return -EINVAL;
-+ }
-+
-+ div64_u64_rem(size, ob->window_size, &remainder);
-+ if (remainder) {
-+ dev_err(pcie->dev,
-+ "res size %pap needs to be multiple of window size %pap\n",
-+ &size, &ob->window_size);
-+ return -EINVAL;
-+ }
-+
-+ if (axi_addr < ob->axi_offset) {
-+ dev_err(pcie->dev,
-+ "axi address %pap less than offset %pap\n",
-+ &axi_addr, &ob->axi_offset);
-+ return -EINVAL;
-+ }
-+
-+ /*
-+ * Translate the AXI address to the internal address used by the iProc
-+ * PCIe core before programming the OARR
-+ */
-+ axi_addr -= ob->axi_offset;
-+
-+ for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
-+ writel(lower_32_bits(axi_addr) | OARR_VALID |
-+ (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i));
-+ writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i));
-+ writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i));
-+ writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i));
-+
-+ size -= ob->window_size;
-+ if (size == 0)
-+ break;
-+
-+ axi_addr += ob->window_size;
-+ pci_addr += ob->window_size;
-+ }
-+
-+ return 0;
-+}
-+
-+static int iproc_pcie_map_ranges(struct iproc_pcie *pcie,
-+ struct list_head *resources)
-+{
-+ struct resource_entry *window;
-+ int ret;
-+
-+ resource_list_for_each_entry(window, resources) {
-+ struct resource *res = window->res;
-+ u64 res_type = resource_type(res);
-+
-+ switch (res_type) {
-+ case IORESOURCE_IO:
-+ case IORESOURCE_BUS:
-+ break;
-+ case IORESOURCE_MEM:
-+ ret = iproc_pcie_setup_ob(pcie, res->start,
-+ res->start - window->offset,
-+ resource_size(res));
-+ if (ret)
-+ return ret;
-+ break;
-+ default:
-+ dev_err(pcie->dev, "invalid resource %pR\n", res);
-+ return -EINVAL;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
- int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
- {
- int ret;
-@@ -235,6 +342,14 @@ int iproc_pcie_setup(struct iproc_pcie *
-
- iproc_pcie_reset(pcie);
-
-+ if (pcie->need_ob_cfg) {
-+ ret = iproc_pcie_map_ranges(pcie, res);
-+ if (ret) {
-+ dev_err(pcie->dev, "map failed\n");
-+ goto err_power_off_phy;
-+ }
-+ }
-+
- #ifdef CONFIG_ARM
- pcie->sysdata.private_data = pcie;
- sysdata = &pcie->sysdata;
---- a/drivers/pci/host/pcie-iproc.h
-+++ b/drivers/pci/host/pcie-iproc.h
-@@ -15,6 +15,19 @@
- #define _PCIE_IPROC_H
-
- /**
-+ * iProc PCIe outbound mapping
-+ * @set_oarr_size: indicates the OARR size bit needs to be set
-+ * @axi_offset: offset from the AXI address to the internal address used by
-+ * the iProc PCIe core
-+ * @window_size: outbound window size
-+ */
-+struct iproc_pcie_ob {
-+ bool set_oarr_size;
-+ resource_size_t axi_offset;
-+ resource_size_t window_size;
-+};
-+
-+/**
- * iProc PCIe device
- * @dev: pointer to device data structure
- * @base: PCIe host controller I/O register base
-@@ -23,6 +36,8 @@
- * @phy: optional PHY device that controls the Serdes
- * @irqs: interrupt IDs
- * @map_irq: function callback to map interrupts
-+ * @need_ob_cfg: indidates SW needs to configure the outbound mapping window
-+ * @ob: outbound mapping parameters
- */
- struct iproc_pcie {
- struct device *dev;
-@@ -33,6 +48,8 @@ struct iproc_pcie {
- struct pci_bus *root_bus;
- struct phy *phy;
- int (*map_irq)(const struct pci_dev *, u8, u8);
-+ bool need_ob_cfg;
-+ struct iproc_pcie_ob ob;
- };
-
- int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res);
projects / openwrt.git / blobdiff