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-rw-r--r--target/linux/bcm53xx/patches-4.3/146-PCI-iproc-Add-outbound-mapping-support.patch236
1 files changed, 236 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.3/146-PCI-iproc-Add-outbound-mapping-support.patch b/target/linux/bcm53xx/patches-4.3/146-PCI-iproc-Add-outbound-mapping-support.patch
new file mode 100644
index 0000000..b65d305
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.3/146-PCI-iproc-Add-outbound-mapping-support.patch
@@ -0,0 +1,236 @@
+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);
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