diff options
33 files changed, 1699 insertions, 414 deletions
diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt index eabcb4b5db6e..dd8d920bcbd6 100644 --- a/Documentation/devicetree/bindings/pci/designware-pcie.txt +++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt @@ -3,7 +3,7 @@ Required properties: - compatible: should contain "snps,dw-pcie" to identify the core, plus an identifier for the specific instance, such - as "samsung,exynos5440-pcie". + as "samsung,exynos5440-pcie" or "fsl,imx6q-pcie". - reg: base addresses and lengths of the pcie controller, the phy controller, additional register for the phy controller. - interrupts: interrupt values for level interrupt, @@ -21,6 +21,11 @@ Required properties: - num-lanes: number of lanes to use - reset-gpio: gpio pin number of power good signal +Optional properties for fsl,imx6q-pcie +- power-on-gpio: gpio pin number of power-enable signal +- wake-up-gpio: gpio pin number of incoming wakeup signal +- disable-gpio: gpio pin number of outgoing rfkill/endpoint disable signal + Example: SoC specific DT Entry: diff --git a/MAINTAINERS b/MAINTAINERS index 18d6c2a7bd36..906d440f1afe 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6347,6 +6347,12 @@ S: Supported F: Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt F: drivers/pci/host/pci-tegra.c +PCI DRIVER FOR SAMSUNG EXYNOS +M: Jingoo Han <jg1.han@samsung.com> +L: linux-pci@vger.kernel.org +S: Maintained +F: drivers/pci/host/pci-exynos.c + PCMCIA SUBSYSTEM P: Linux PCMCIA Team L: linux-pcmcia@lists.infradead.org diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index 55593ee2d5aa..db86f97a0e92 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -189,14 +189,13 @@ static size_t eeh_gather_pci_data(struct eeh_dev *edev, char * buf, size_t len) } /* If PCI-E capable, dump PCI-E cap 10, and the AER */ - cap = pci_find_capability(dev, PCI_CAP_ID_EXP); - if (cap) { + if (pci_is_pcie(dev)) { n += scnprintf(buf+n, len-n, "pci-e cap10:\n"); printk(KERN_WARNING "EEH: PCI-E capabilities and status follow:\n"); for (i=0; i<=8; i++) { - eeh_ops->read_config(dn, cap+4*i, 4, &cfg); + eeh_ops->read_config(dn, dev->pcie_cap+4*i, 4, &cfg); n += scnprintf(buf+n, len-n, "%02x:%x\n", 4*i, cfg); printk(KERN_WARNING "EEH: PCI-E %02x: %08x\n", i, cfg); } diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index ccfb50ddfe38..92e7258478d8 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -45,7 +45,7 @@ static void quirk_fsl_pcie_header(struct pci_dev *dev) u8 hdr_type; /* if we aren't a PCIe don't bother */ - if (!pci_find_capability(dev, PCI_CAP_ID_EXP)) + if (!pci_is_pcie(dev)) return; /* if we aren't in host mode don't bother */ diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c index b7180e6e900d..c45593db7718 100644 --- a/arch/tile/kernel/pci.c +++ b/arch/tile/kernel/pci.c @@ -251,15 +251,12 @@ static void fixup_read_and_payload_sizes(void) /* Scan for the smallest maximum payload size. */ for_each_pci_dev(dev) { u32 devcap; - int max_payload; if (!pci_is_pcie(dev)) continue; - pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &devcap); - max_payload = devcap & PCI_EXP_DEVCAP_PAYLOAD; - if (max_payload < smallest_max_payload) - smallest_max_payload = max_payload; + if (dev->pcie_mpss < smallest_max_payload) + smallest_max_payload = dev->pcie_mpss; } /* Now, set the max_payload_size for all devices to that value. */ diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index f5809fa2753e..b046e070e088 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -231,7 +231,7 @@ static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int wh offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)]; if ((offset) && (where == offset)) - value = value & 0xfffffffc; + value = value & ~PCI_EXP_LNKCTL_ASPMC; return raw_pci_write(pci_domain_nr(bus), bus->number, devfn, where, size, value); @@ -252,7 +252,7 @@ static struct pci_ops quirk_pcie_aspm_ops = { */ static void pcie_rootport_aspm_quirk(struct pci_dev *pdev) { - int cap_base, i; + int i; struct pci_bus *pbus; struct pci_dev *dev; @@ -278,7 +278,7 @@ static void pcie_rootport_aspm_quirk(struct pci_dev *pdev) for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i) quirk_aspm_offset[i] = 0; - pbus->ops = pbus->parent->ops; + pci_bus_set_ops(pbus, pbus->parent->ops); } else { /* * If devices are attached to the root port at power-up or @@ -286,13 +286,15 @@ static void pcie_rootport_aspm_quirk(struct pci_dev *pdev) * each root port to save the register offsets and replace the * bus ops. */ - list_for_each_entry(dev, &pbus->devices, bus_list) { + list_for_each_entry(dev, &pbus->devices, bus_list) /* There are 0 to 8 devices attached to this bus */ - cap_base = pci_find_capability(dev, PCI_CAP_ID_EXP); - quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] = cap_base + 0x10; - } - pbus->ops = &quirk_pcie_aspm_ops; + quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] = + dev->pcie_cap + PCI_EXP_LNKCTL; + + pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops); + dev_info(&pbus->dev, "writes to ASPM control bits will be ignored\n"); } + } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk); diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c index 46f80e2c92f7..6d2c49b86b7f 100644 --- a/drivers/acpi/apei/apei-base.c +++ b/drivers/acpi/apei/apei-base.c @@ -758,9 +758,9 @@ int apei_osc_setup(void) .cap.pointer = capbuf, }; - capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; - capbuf[OSC_SUPPORT_TYPE] = 1; - capbuf[OSC_CONTROL_TYPE] = 0; + capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; + capbuf[OSC_SUPPORT_DWORD] = 1; + capbuf[OSC_CONTROL_DWORD] = 0; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)) || ACPI_FAILURE(acpi_run_osc(handle, &context))) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index b587ec8257b2..fbcfaa682c15 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -255,7 +255,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) acpi_print_osc_error(handle, context, "_OSC invalid revision"); if (errors & OSC_CAPABILITIES_MASK_ERROR) { - if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] + if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] & OSC_QUERY_ENABLE) goto out_success; status = AE_SUPPORT; @@ -295,30 +295,30 @@ static void acpi_bus_osc_support(void) }; acpi_handle handle; - capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; - capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ + capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; + capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) - capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; #endif #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) - capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; #endif #ifdef ACPI_HOTPLUG_OST - capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; #endif if (!ghes_disable) - capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) return; if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { u32 *capbuf_ret = context.ret.pointer; - if (context.ret.length > OSC_SUPPORT_TYPE) + if (context.ret.length > OSC_SUPPORT_DWORD) osc_sb_apei_support_acked = - capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT; + capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; kfree(context.ret.pointer); } /* do we need to check other returned cap? Sounds no */ diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index d3874f425653..924ad92852c1 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -49,10 +49,10 @@ static int acpi_pci_root_add(struct acpi_device *device, const struct acpi_device_id *not_used); static void acpi_pci_root_remove(struct acpi_device *device); -#define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \ - | OSC_ACTIVE_STATE_PWR_SUPPORT \ - | OSC_CLOCK_PWR_CAPABILITY_SUPPORT \ - | OSC_MSI_SUPPORT) +#define ACPI_PCIE_REQ_SUPPORT (OSC_PCI_EXT_CONFIG_SUPPORT \ + | OSC_PCI_ASPM_SUPPORT \ + | OSC_PCI_CLOCK_PM_SUPPORT \ + | OSC_PCI_MSI_SUPPORT) static const struct acpi_device_id root_device_ids[] = { {"PNP0A03", 0}, @@ -127,6 +127,55 @@ static acpi_status try_get_root_bridge_busnr(acpi_handle handle, return AE_OK; } +struct pci_osc_bit_struct { + u32 bit; + char *desc; +}; + +static struct pci_osc_bit_struct pci_osc_support_bit[] = { + { OSC_PCI_EXT_CONFIG_SUPPORT, "ExtendedConfig" }, + { OSC_PCI_ASPM_SUPPORT, "ASPM" }, + { OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" }, + { OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" }, + { OSC_PCI_MSI_SUPPORT, "MSI" }, +}; + +static struct pci_osc_bit_struct pci_osc_control_bit[] = { + { OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, "PCIeHotplug" }, + { OSC_PCI_SHPC_NATIVE_HP_CONTROL, "SHPCHotplug" }, + { OSC_PCI_EXPRESS_PME_CONTROL, "PME" }, + { OSC_PCI_EXPRESS_AER_CONTROL, "AER" }, + { OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" }, +}; + +static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word, + struct pci_osc_bit_struct *table, int size) +{ + char buf[80]; + int i, len = 0; + struct pci_osc_bit_struct *entry; + + buf[0] = '\0'; + for (i = 0, entry = table; i < size; i++, entry++) + if (word & entry->bit) + len += snprintf(buf + len, sizeof(buf) - len, "%s%s", + len ? " " : "", entry->desc); + + dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf); +} + +static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word) +{ + decode_osc_bits(root, msg, word, pci_osc_support_bit, + ARRAY_SIZE(pci_osc_support_bit)); +} + +static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word) +{ + decode_osc_bits(root, msg, word, pci_osc_control_bit, + ARRAY_SIZE(pci_osc_control_bit)); +} + static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; static acpi_status acpi_pci_run_osc(acpi_handle handle, @@ -158,14 +207,14 @@ static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, support &= OSC_PCI_SUPPORT_MASKS; support |= root->osc_support_set; - capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; - capbuf[OSC_SUPPORT_TYPE] = support; + capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; + capbuf[OSC_SUPPORT_DWORD] = support; if (control) { *control &= OSC_PCI_CONTROL_MASKS; - capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set; + capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set; } else { /* Run _OSC query only with existing controls. */ - capbuf[OSC_CONTROL_TYPE] = root->osc_control_set; + capbuf[OSC_CONTROL_DWORD] = root->osc_control_set; } status = acpi_pci_run_osc(root->device->handle, capbuf, &result); @@ -180,11 +229,7 @@ static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) { acpi_status status; - acpi_handle tmp; - status = acpi_get_handle(root->device->handle, "_OSC", &tmp); - if (ACPI_FAILURE(status)) - return status; mutex_lock(&osc_lock); status = acpi_pci_query_osc(root, flags, NULL); mutex_unlock(&osc_lock); @@ -316,9 +361,8 @@ EXPORT_SYMBOL_GPL(acpi_get_pci_dev); acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) { struct acpi_pci_root *root; - acpi_status status; + acpi_status status = AE_OK; u32 ctrl, capbuf[3]; - acpi_handle tmp; if (!mask) return AE_BAD_PARAMETER; @@ -331,10 +375,6 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) if (!root) return AE_NOT_EXIST; - status = acpi_get_handle(handle, "_OSC", &tmp); - if (ACPI_FAILURE(status)) - return status; - mutex_lock(&osc_lock); *mask = ctrl | root->osc_control_set; @@ -349,17 +389,21 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) goto out; if (ctrl == *mask) break; + decode_osc_control(root, "platform does not support", + ctrl & ~(*mask)); ctrl = *mask; } if ((ctrl & req) != req) { + decode_osc_control(root, "not requesting control; platform does not support", + req & ~(ctrl)); status = AE_SUPPORT; goto out; } - capbuf[OSC_QUERY_TYPE] = 0; - capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; - capbuf[OSC_CONTROL_TYPE] = ctrl; + capbuf[OSC_QUERY_DWORD] = 0; + capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set; + capbuf[OSC_CONTROL_DWORD] = ctrl; status = acpi_pci_run_osc(handle, capbuf, mask); if (ACPI_SUCCESS(status)) root->osc_control_set = *mask; @@ -369,6 +413,87 @@ out: } EXPORT_SYMBOL(acpi_pci_osc_control_set); +static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm, + int *clear_aspm) +{ + u32 support, control, requested; + acpi_status status; + struct acpi_device *device = root->device; + acpi_handle handle = device->handle; + + /* + * All supported architectures that use ACPI have support for + * PCI domains, so we indicate this in _OSC support capabilities. + */ + support = OSC_PCI_SEGMENT_GROUPS_SUPPORT; + if (pci_ext_cfg_avail()) + support |= OSC_PCI_EXT_CONFIG_SUPPORT; + if (pcie_aspm_support_enabled()) + support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT; + if (pci_msi_enabled()) + support |= OSC_PCI_MSI_SUPPORT; + + decode_osc_support(root, "OS supports", support); + status = acpi_pci_osc_support(root, support); + if (ACPI_FAILURE(status)) { + dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n", + acpi_format_exception(status)); + *no_aspm = 1; + return; + } + + if (pcie_ports_disabled) { + dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control\n"); + return; + } + + if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) { + decode_osc_support(root, "not requesting OS control; OS requires", + ACPI_PCIE_REQ_SUPPORT); + return; + } + + control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL + | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL + | OSC_PCI_EXPRESS_PME_CONTROL; + + if (pci_aer_available()) { + if (aer_acpi_firmware_first()) + dev_info(&device->dev, + "PCIe AER handled by firmware\n"); + else + control |= OSC_PCI_EXPRESS_AER_CONTROL; + } + + requested = control; + status = acpi_pci_osc_control_set(handle, &control, + OSC_PCI_EXPRESS_CAPABILITY_CONTROL); + if (ACPI_SUCCESS(status)) { + decode_osc_control(root, "OS now controls", control); + if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { + /* + * We have ASPM control, but the FADT indicates + * that it's unsupported. Clear it. + */ + *clear_aspm = 1; + } + } else { + decode_osc_control(root, "OS requested", requested); + decode_osc_control(root, "platform willing to grant", control); + dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n", + acpi_format_exception(status)); + + /* + * We want to disable ASPM here, but aspm_disabled + * needs to remain in its state from boot so that we + * properly handle PCIe 1.1 devices. So we set this + * flag here, to defer the action until after the ACPI + * root scan. + */ + *no_aspm = 1; + } +} + static int acpi_pci_root_add(struct acpi_device *device, const struct acpi_device_id *not_used) { @@ -376,9 +501,8 @@ static int acpi_pci_root_add(struct acpi_device *device, acpi_status status; int result; struct acpi_pci_root *root; - u32 flags, base_flags; acpi_handle handle = device->handle; - bool no_aspm = false, clear_aspm = false; + int no_aspm = 0, clear_aspm = 0; root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); if (!root) @@ -431,81 +555,7 @@ static int acpi_pci_root_add(struct acpi_device *device, root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle); - /* - * All supported architectures that use ACPI have support for - * PCI domains, so we indicate this in _OSC support capabilities. - */ - flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; - acpi_pci_osc_support(root, flags); - - if (pci_ext_cfg_avail()) - flags |= OSC_EXT_PCI_CONFIG_SUPPORT; - if (pcie_aspm_support_enabled()) { - flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | - OSC_CLOCK_PWR_CAPABILITY_SUPPORT; - } - if (pci_msi_enabled()) - flags |= OSC_MSI_SUPPORT; - if (flags != base_flags) { - status = acpi_pci_osc_support(root, flags); - if (ACPI_FAILURE(status)) { - dev_info(&device->dev, "ACPI _OSC support " - "notification failed, disabling PCIe ASPM\n"); - no_aspm = true; - flags = base_flags; - } - } - - if (!pcie_ports_disabled - && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) { - flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL - | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL - | OSC_PCI_EXPRESS_PME_CONTROL; - - if (pci_aer_available()) { - if (aer_acpi_firmware_first()) - dev_dbg(&device->dev, - "PCIe errors handled by BIOS.\n"); - else - flags |= OSC_PCI_EXPRESS_AER_CONTROL; - } - - dev_info(&device->dev, - "Requesting ACPI _OSC control (0x%02x)\n", flags); - - status = acpi_pci_osc_control_set(handle, &flags, - OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL); - if (ACPI_SUCCESS(status)) { - dev_info(&device->dev, - "ACPI _OSC control (0x%02x) granted\n", flags); - if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { - /* - * We have ASPM control, but the FADT indicates - * that it's unsupported. Clear it. - */ - clear_aspm = true; - } - } else { - dev_info(&device->dev, - "ACPI _OSC request failed (%s), " - "returned control mask: 0x%02x\n", - acpi_format_exception(status), flags); - dev_info(&device->dev, - "ACPI _OSC control for PCIe not granted, disabling ASPM\n"); - /* - * We want to disable ASPM here, but aspm_disabled - * needs to remain in its state from boot so that we - * properly handle PCIe 1.1 devices. So we set this - * flag here, to defer the action until after the ACPI - * root scan. - */ - no_aspm = true; - } - } else { - dev_info(&device->dev, - "Unable to request _OSC control " - "(_OSC support mask: 0x%02x)\n", flags); - } + negotiate_os_control(root, &no_aspm, &clear_aspm); /* * TBD: Need PCI interface for enumeration/configuration of roots. diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 555164e270a7..871066a8c630 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1174,23 +1174,16 @@ int evergreen_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk) void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev) { - u16 ctl, v; - int err; - - err = pcie_capability_read_word(rdev->pdev, PCI_EXP_DEVCTL, &ctl); - if (err) - return; - - v = (ctl & PCI_EXP_DEVCTL_READRQ) >> 12; + int readrq; + u16 v; + readrq = pcie_get_readrq(rdev->pdev); + v = ffs(readrq) - 8; /* if bios or OS sets MAX_READ_REQUEST_SIZE to an invalid value, fix it * to avoid hangs or perfomance issues */ - if ((v == 0) || (v == 6) || (v == 7)) { - ctl &= ~PCI_EXP_DEVCTL_READRQ; - ctl |= (2 << 12); - pcie_capability_write_word(rdev->pdev, PCI_EXP_DEVCTL, ctl); - } + if ((v == 0) || (v == 6) || (v == 7)) + pcie_set_readrq(rdev->pdev, 512); } static bool dce4_is_in_vblank(struct radeon_device *rdev, int crtc) diff --git a/drivers/infiniband/hw/qib/qib_pcie.c b/drivers/infiniband/hw/qib/qib_pcie.c index 3f14009fb662..c8d9c4ab142b 100644 --- a/drivers/infiniband/hw/qib/qib_pcie.c +++ b/drivers/infiniband/hw/qib/qib_pcie.c @@ -51,8 +51,8 @@ * file calls, even though this violates some * expectations of harmlessness. */ -static int qib_tune_pcie_caps(struct qib_devdata *); -static int qib_tune_pcie_coalesce(struct qib_devdata *); +static void qib_tune_pcie_caps(struct qib_devdata *); +static void qib_tune_pcie_coalesce(struct qib_devdata *); /* * Do all the common PCIe setup and initialization. @@ -476,30 +476,6 @@ void qib_pcie_reenable(struct qib_devdata *dd, u16 cmd, u8 iline, u8 cline) "pci_enable_device failed after reset: %d\n", r); } -/* code to adjust PCIe capabilities. */ - -static int fld2val(int wd, int mask) -{ - int lsbmask; - - if (!mask) - return 0; - wd &= mask; - lsbmask = mask ^ (mask & (mask - 1)); - wd /= lsbmask; - return wd; -} - -static int val2fld(int wd, int mask) -{ - int lsbmask; - - if (!mask) - return 0; - lsbmask = mask ^ (mask & (mask - 1)); - wd *= lsbmask; - return wd; -} static int qib_pcie_coalesce; module_param_named(pcie_coalesce, qib_pcie_coalesce, int, S_IRUGO); @@ -511,7 +487,7 @@ MODULE_PARM_DESC(pcie_coalesce, "tune PCIe colescing on some Intel chipsets"); * of these chipsets, with some BIOS settings, and enabling it on those * systems may result in the system crashing, and/or data corruption. */ -static int qib_tune_pcie_coalesce(struct qib_devdata *dd) +static void qib_tune_pcie_coalesce(struct qib_devdata *dd) { int r; struct pci_dev *parent; @@ -519,18 +495,18 @@ static int qib_tune_pcie_coalesce(struct qib_devdata *dd) u32 mask, bits, val; if (!qib_pcie_coalesce) - return 0; + return; /* Find out supported and configured values for parent (root) */ parent = dd->pcidev->bus->self; if (parent->bus->parent) { qib_devinfo(dd->pcidev, "Parent not root\n"); - return 1; + return; } if (!pci_is_pcie(parent)) - return 1; + return; if (parent->vendor != 0x8086) - return 1; + return; /* * - bit 12: Max_rdcmp_Imt_EN: need to set to 1 @@ -563,13 +539,12 @@ static int qib_tune_pcie_coalesce(struct qib_devdata *dd) mask = (3U << 24) | (7U << 10); } else { /* not one of the chipsets that we know about */ - return 1; + return; } pci_read_config_dword(parent, 0x48, &val); val &= ~mask; val |= bits; r = pci_write_config_dword(parent, 0x48, val); - return 0; } /* @@ -580,55 +555,44 @@ static int qib_pcie_caps; module_param_named(pcie_caps, qib_pcie_caps, int, S_IRUGO); MODULE_PARM_DESC(pcie_caps, "Max PCIe tuning: Payload (0..3), ReadReq (4..7)"); -static int qib_tune_pcie_caps(struct qib_devdata *dd) +static void qib_tune_pcie_caps(struct qib_devdata *dd) { - int ret = 1; /* Assume the worst */ struct pci_dev *parent; - u16 pcaps, pctl, ecaps, ectl; - int rc_sup, ep_sup; - int rc_cur, ep_cur; + u16 rc_mpss, rc_mps, ep_mpss, ep_mps; + u16 rc_mrrs, ep_mrrs, max_mrrs; /* Find out supported and configured values for parent (root) */ parent = dd->pcidev->bus->self; - if (parent->bus->parent) { + if (!pci_is_root_bus(parent->bus)) { qib_devinfo(dd->pcidev, "Parent not root\n"); - goto bail; + return; } if (!pci_is_pcie(parent) || !pci_is_pcie(dd->pcidev)) - goto bail; - pcie_capability_read_word(parent, PCI_EXP_DEVCAP, &pcaps); - pcie_capability_read_word(parent, PCI_EXP_DEVCTL, &pctl); + return; + + rc_mpss = parent->pcie_mpss; + rc_mps = ffs(pcie_get_mps(parent)) - 8; /* Find out supported and configured values for endpoint (us) */ - pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCAP, &ecaps); - pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL, &ectl); + ep_mpss = dd->pcidev->pcie_mpss; + ep_mps = ffs(pcie_get_mps(dd->pcidev)) - 8; - ret = 0; /* Find max payload supported by root, endpoint */ - rc_sup = fld2val(pcaps, PCI_EXP_DEVCAP_PAYLOAD); - ep_sup = fld2val(ecaps, PCI_EXP_DEVCAP_PAYLOAD); - if (rc_sup > ep_sup) - rc_sup = ep_sup; - - rc_cur = fld2val(pctl, PCI_EXP_DEVCTL_PAYLOAD); - ep_cur = fld2val(ectl, PCI_EXP_DEVCTL_PAYLOAD); + if (rc_mpss > ep_mpss) + rc_mpss = ep_mpss; /* If Supported greater than limit in module param, limit it */ - if (rc_sup > (qib_pcie_caps & 7)) - rc_sup = qib_pcie_caps & 7; + if (rc_mpss > (qib_pcie_caps & 7)) + rc_mpss = qib_pcie_caps & 7; /* If less than (allowed, supported), bump root payload */ - if (rc_sup > rc_cur) { - rc_cur = rc_sup; - pctl = (pctl & ~PCI_EXP_DEVCTL_PAYLOAD) | - val2fld(rc_cur, PCI_EXP_DEVCTL_PAYLOAD); - pcie_capability_write_word(parent, PCI_EXP_DEVCTL, pctl); + if (rc_mpss > rc_mps) { + rc_mps = rc_mpss; + pcie_set_mps(parent, 128 << rc_mps); } /* If less than (allowed, supported), bump endpoint payload */ - if (rc_sup > ep_cur) { - ep_cur = rc_sup; - ectl = (ectl & ~PCI_EXP_DEVCTL_PAYLOAD) | - val2fld(ep_cur, PCI_EXP_DEVCTL_PAYLOAD); - pcie_capability_write_word(dd->pcidev, PCI_EXP_DEVCTL, ectl); + if (rc_mpss > ep_mps) { + ep_mps = rc_mpss; + pcie_set_mps(dd->pcidev, 128 << ep_mps); } /* @@ -636,26 +600,22 @@ static int qib_tune_pcie_caps(struct qib_devdata *dd) * No field for max supported, but PCIe spec limits it to 4096, * which is code '5' (log2(4096) - 7) */ - rc_sup = 5; - if (rc_sup > ((qib_pcie_caps >> 4) & 7)) - rc_sup = (qib_pcie_caps >> 4) & 7; - rc_cur = fld2val(pctl, PCI_EXP_DEVCTL_READRQ); - ep_cur = fld2val(ectl, PCI_EXP_DEVCTL_READRQ); - - if (rc_sup > rc_cur) { - rc_cur = rc_sup; - pctl = (pctl & ~PCI_EXP_DEVCTL_READRQ) | - val2fld(rc_cur, PCI_EXP_DEVCTL_READRQ); - pcie_capability_write_word(parent, PCI_EXP_DEVCTL, pctl); + max_mrrs = 5; + if (max_mrrs > ((qib_pcie_caps >> 4) & 7)) + max_mrrs = (qib_pcie_caps >> 4) & 7; + + max_mrrs = 128 << max_mrrs; + rc_mrrs = pcie_get_readrq(parent); + ep_mrrs = pcie_get_readrq(dd->pcidev); + + if (max_mrrs > rc_mrrs) { + rc_mrrs = max_mrrs; + pcie_set_readrq(parent, rc_mrrs); } - if (rc_sup > ep_cur) { - ep_cur = rc_sup; - ectl = (ectl & ~PCI_EXP_DEVCTL_READRQ) | - val2fld(ep_cur, PCI_EXP_DEVCTL_READRQ); - pcie_capability_write_word(dd->pcidev, PCI_EXP_DEVCTL, ectl); + if (max_mrrs > ep_mrrs) { + ep_mrrs = max_mrrs; + pcie_set_readrq(dd->pcidev, ep_mrrs); } -bail: - return ret; } /* End of PCIe capability tuning */ diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index 3d9504811126..d0cf0faab407 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -15,8 +15,22 @@ config PCI_EXYNOS select PCIEPORTBUS select PCIE_DW +config PCI_IMX6 + bool "Freescale i.MX6 PCIe controller" + depends on SOC_IMX6Q + select PCIEPORTBUS + select PCIE_DW + config PCI_TEGRA bool "NVIDIA Tegra PCIe controller" depends on ARCH_TEGRA +config PCI_RCAR_GEN2 + bool "Renesas R-Car Gen2 Internal PCI controller" + depends on ARM && (ARCH_R8A7790 || ARCH_R8A7791 || COMPILE_TEST) + help + Say Y here if you want internal PCI support on R-Car Gen2 SoC. + There are 3 internal PCI controllers available with a single + built-in EHCI/OHCI host controller present on each one. + endmenu diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile index c9a997b2690d..13fb3333aa05 100644 --- a/drivers/pci/host/Makefile +++ b/drivers/pci/host/Makefile @@ -1,4 +1,6 @@ obj-$(CONFIG_PCIE_DW) += pcie-designware.o obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o +obj-$(CONFIG_PCI_IMX6) += pci-imx6.o obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o +obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c index 94e096bb2d0a..24beed38ddc7 100644 --- a/drivers/pci/host/pci-exynos.c +++ b/drivers/pci/host/pci-exynos.c @@ -48,6 +48,7 @@ struct exynos_pcie { #define PCIE_IRQ_SPECIAL 0x008 #define PCIE_IRQ_EN_PULSE 0x00c #define PCIE_IRQ_EN_LEVEL 0x010 +#define IRQ_MSI_ENABLE (0x1 << 2) #define PCIE_IRQ_EN_SPECIAL 0x014 #define PCIE_PWR_RESET 0x018 #define PCIE_CORE_RESET 0x01c @@ -77,18 +78,28 @@ struct exynos_pcie { #define PCIE_PHY_PLL_BIAS 0x00c #define PCIE_PHY_DCC_FEEDBACK 0x014 #define PCIE_PHY_PLL_DIV_1 0x05c +#define PCIE_PHY_COMMON_POWER 0x064 +#define PCIE_PHY_COMMON_PD_CMN (0x1 << 3) #define PCIE_PHY_TRSV0_EMP_LVL 0x084 #define PCIE_PHY_TRSV0_DRV_LVL 0x088 #define PCIE_PHY_TRSV0_RXCDR 0x0ac +#define PCIE_PHY_TRSV0_POWER 0x0c4 +#define PCIE_PHY_TRSV0_PD_TSV (0x1 << 7) #define PCIE_PHY_TRSV0_LVCC 0x0dc #define PCIE_PHY_TRSV1_EMP_LVL 0x144 #define PCIE_PHY_TRSV1_RXCDR 0x16c +#define PCIE_PHY_TRSV1_POWER 0x184 +#define PCIE_PHY_TRSV1_PD_TSV (0x1 << 7) #define PCIE_PHY_TRSV1_LVCC 0x19c #define PCIE_PHY_TRSV2_EMP_LVL 0x204 #define PCIE_PHY_TRSV2_RXCDR 0x22c +#define PCIE_PHY_TRSV2_POWER 0x244 +#define PCIE_PHY_TRSV2_PD_TSV (0x1 << 7) #define PCIE_PHY_TRSV2_LVCC 0x25c #define PCIE_PHY_TRSV3_EMP_LVL 0x2c4 #define PCIE_PHY_TRSV3_RXCDR 0x2ec +#define PCIE_PHY_TRSV3_POWER 0x304 +#define PCIE_PHY_TRSV3_PD_TSV (0x1 << 7) #define PCIE_PHY_TRSV3_LVCC 0x31c static inline void exynos_elb_writel(struct exynos_pcie *pcie, u32 val, u32 reg) @@ -202,6 +213,58 @@ static void exynos_pcie_deassert_phy_reset(struct pcie_port *pp) exynos_blk_writel(exynos_pcie, 0, PCIE_PHY_TRSV_RESET); } +static void exynos_pcie_power_on_phy(struct pcie_port *pp) +{ + u32 val; + struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_COMMON_POWER); + val &= ~PCIE_PHY_COMMON_PD_CMN; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_COMMON_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV0_POWER); + val &= ~PCIE_PHY_TRSV0_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV0_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV1_POWER); + val &= ~PCIE_PHY_TRSV1_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV1_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV2_POWER); + val &= ~PCIE_PHY_TRSV2_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV2_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV3_POWER); + val &= ~PCIE_PHY_TRSV3_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV3_POWER); +} + +static void exynos_pcie_power_off_phy(struct pcie_port *pp) +{ + u32 val; + struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_COMMON_POWER); + val |= PCIE_PHY_COMMON_PD_CMN; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_COMMON_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV0_POWER); + val |= PCIE_PHY_TRSV0_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV0_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV1_POWER); + val |= PCIE_PHY_TRSV1_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV1_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV2_POWER); + val |= PCIE_PHY_TRSV2_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV2_POWER); + + val = exynos_phy_readl(exynos_pcie, PCIE_PHY_TRSV3_POWER); + val |= PCIE_PHY_TRSV3_PD_TSV; + exynos_phy_writel(exynos_pcie, val, PCIE_PHY_TRSV3_POWER); +} + static void exynos_pcie_init_phy(struct pcie_port *pp) { struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp); @@ -270,6 +333,9 @@ static int exynos_pcie_establish_link(struct pcie_port *pp) /* de-assert phy reset */ exynos_pcie_deassert_phy_reset(pp); + /* power on phy */ + exynos_pcie_power_on_phy(pp); + /* initialize phy */ exynos_pcie_init_phy(pp); @@ -302,6 +368,9 @@ static int exynos_pcie_establish_link(struct pcie_port *pp) PCIE_PHY_PLL_LOCKED); dev_info(pp->dev, "PLL Locked: 0x%x\n", val); } + /* power off phy */ + exynos_pcie_power_off_phy(pp); + dev_err(pp->dev, "PCIe Link Fail\n"); return -EINVAL; } @@ -342,9 +411,36 @@ static irqreturn_t exynos_pcie_irq_handler(int irq, void *arg) return IRQ_HANDLED; } +static irqreturn_t exynos_pcie_msi_irq_handler(int irq, void *arg) +{ + struct pcie_port *pp = arg; + + dw_handle_msi_irq(pp); + + return IRQ_HANDLED; +} + +static void exynos_pcie_msi_init(struct pcie_port *pp) +{ + u32 val; + struct exynos_pcie *exynos_pcie = to_exynos_pcie(pp); + + dw_pcie_msi_init(pp); + + /* enable MSI interrupt */ + val = exynos_elb_readl(exynos_pcie, PCIE_IRQ_EN_LEVEL); + val |= IRQ_MSI_ENABLE; + exynos_elb_writel(exynos_pcie, val, PCIE_IRQ_EN_LEVEL); + return; +} + static void exynos_pcie_enable_interrupts(struct pcie_port *pp) { exynos_pcie_enable_irq_pulse(pp); + + if (IS_ENABLED(CONFIG_PCI_MSI)) + exynos_pcie_msi_init(pp); + return; } @@ -430,6 +526,22 @@ static int add_pcie_port(struct pcie_port *pp, struct platform_device *pdev) return ret; } + if (IS_ENABLED(CONFIG_PCI_MSI)) { + pp->msi_irq = platform_get_irq(pdev, 0); + if (!pp->msi_irq) { + dev_err(&pdev->dev, "failed to get msi irq\n"); + return -ENODEV; + } + + ret = devm_request_irq(&pdev->dev, pp->msi_irq, + exynos_pcie_msi_irq_handler, + IRQF_SHARED, "exynos-pcie", pp); + if (ret) { + dev_err(&pdev->dev, "failed to request msi irq\n"); + return ret; + } + } + pp->root_bus_nr = -1; pp->ops = &exynos_pcie_host_ops; @@ -487,18 +599,24 @@ static int __init exynos_pcie_probe(struct platform_device *pdev) elbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); exynos_pcie->elbi_base = devm_ioremap_resource(&pdev->dev, elbi_base); - if (IS_ERR(exynos_pcie->elbi_base)) - return PTR_ERR(exynos_pcie->elbi_base); + if (IS_ERR(exynos_pcie->elbi_base)) { + ret = PTR_ERR(exynos_pcie->elbi_base); + goto fail_bus_clk; + } phy_base = platform_get_resource(pdev, IORESOURCE_MEM, 1); exynos_pcie->phy_base = devm_ioremap_resource(&pdev->dev, phy_base); - if (IS_ERR(exynos_pcie->phy_base)) - return PTR_ERR(exynos_pcie->phy_base); + if (IS_ERR(exynos_pcie->phy_base)) { + ret = PTR_ERR(exynos_pcie->phy_base); + goto fail_bus_clk; + } block_base = platform_get_resource(pdev, IORESOURCE_MEM, 2); exynos_pcie->block_base = devm_ioremap_resource(&pdev->dev, block_base); - if (IS_ERR(exynos_pcie->block_base)) - return PTR_ERR(exynos_pcie->block_base); + if (IS_ERR(exynos_pcie->block_base)) { + ret = PTR_ERR(exynos_pcie->block_base); + goto fail_bus_clk; + } ret = add_pcie_port(pp, pdev); if (ret < 0) @@ -535,7 +653,7 @@ static struct platform_driver exynos_pcie_driver = { .driver = { .name = "exynos-pcie", .owner = THIS_MODULE, - .of_match_table = of_match_ptr(exynos_pcie_of_match), + .of_match_table = exynos_pcie_of_match, }, }; diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c new file mode 100644 index 000000000000..bd70af8f31ac --- /dev/null +++ b/drivers/pci/host/pci-imx6.c @@ -0,0 +1,568 @@ +/* + * PCIe host controller driver for Freescale i.MX6 SoCs + * + * Copyright (C) 2013 Kosagi + * http://www.kosagi.com + * + * Author: Sean Cross <xobs@kosagi.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/resource.h> +#include <linux/signal.h> +#include <linux/types.h> + +#include "pcie-designware.h" + +#define to_imx6_pcie(x) container_of(x, struct imx6_pcie, pp) + +struct imx6_pcie { + int reset_gpio; + int power_on_gpio; + int wake_up_gpio; + int disable_gpio; + struct clk *lvds_gate; + struct clk *sata_ref_100m; + struct clk *pcie_ref_125m; + struct clk *pcie_axi; + struct pcie_port pp; + struct regmap *iomuxc_gpr; + void __iomem *mem_base; +}; + +/* PCIe Port Logic registers (memory-mapped) */ +#define PL_OFFSET 0x700 +#define PCIE_PHY_DEBUG_R0 (PL_OFFSET + 0x28) +#define PCIE_PHY_DEBUG_R1 (PL_OFFSET + 0x2c) + +#define PCIE_PHY_CTRL (PL_OFFSET + 0x114) +#define PCIE_PHY_CTRL_DATA_LOC 0 +#define PCIE_PHY_CTRL_CAP_ADR_LOC 16 +#define PCIE_PHY_CTRL_CAP_DAT_LOC 17 +#define PCIE_PHY_CTRL_WR_LOC 18 +#define PCIE_PHY_CTRL_RD_LOC 19 + +#define PCIE_PHY_STAT (PL_OFFSET + 0x110) +#define PCIE_PHY_STAT_ACK_LOC 16 + +/* PHY registers (not memory-mapped) */ +#define PCIE_PHY_RX_ASIC_OUT 0x100D + +#define PHY_RX_OVRD_IN_LO 0x1005 +#define PHY_RX_OVRD_IN_LO_RX_DATA_EN (1 << 5) +#define PHY_RX_OVRD_IN_LO_RX_PLL_EN (1 << 3) + +static int pcie_phy_poll_ack(void __iomem *dbi_base, int exp_val) +{ + u32 val; + u32 max_iterations = 10; + u32 wait_counter = 0; + + do { + val = readl(dbi_base + PCIE_PHY_STAT); + val = (val >> PCIE_PHY_STAT_ACK_LOC) & 0x1; + wait_counter++; + + if (val == exp_val) + return 0; + + udelay(1); + } while (wait_counter < max_iterations); + + return -ETIMEDOUT; +} + +static int pcie_phy_wait_ack(void __iomem *dbi_base, int addr) +{ + u32 val; + int ret; + + val = addr << PCIE_PHY_CTRL_DATA_LOC; + writel(val, dbi_base + PCIE_PHY_CTRL); + + val |= (0x1 << PCIE_PHY_CTRL_CAP_ADR_LOC); + writel(val, dbi_base + PCIE_PHY_CTRL); + + ret = pcie_phy_poll_ack(dbi_base, 1); + if (ret) + return ret; + + val = addr << PCIE_PHY_CTRL_DATA_LOC; + writel(val, dbi_base + PCIE_PHY_CTRL); + + ret = pcie_phy_poll_ack(dbi_base, 0); + if (ret) + return ret; + + return 0; +} + +/* Read from the 16-bit PCIe PHY control registers (not memory-mapped) */ +static int pcie_phy_read(void __iomem *dbi_base, int addr , int *data) +{ + u32 val, phy_ctl; + int ret; + + ret = pcie_phy_wait_ack(dbi_base, addr); + if (ret) + return ret; + + /* assert Read signal */ + phy_ctl = 0x1 << PCIE_PHY_CTRL_RD_LOC; + writel(phy_ctl, dbi_base + PCIE_PHY_CTRL); + + ret = pcie_phy_poll_ack(dbi_base, 1); + if (ret) + return ret; + + val = readl(dbi_base + PCIE_PHY_STAT); + *data = val & 0xffff; + + /* deassert Read signal */ + writel(0x00, dbi_base + PCIE_PHY_CTRL); + + ret = pcie_phy_poll_ack(dbi_base, 0); + if (ret) + return ret; + + return 0; +} + +static int pcie_phy_write(void __iomem *dbi_base, int addr, int data) +{ + u32 var; + int ret; + + /* write addr */ + /* cap addr */ + ret = pcie_phy_wait_ack(dbi_base, addr); + if (ret) + return ret; + + var = data << PCIE_PHY_CTRL_DATA_LOC; + writel(var, dbi_base + PCIE_PHY_CTRL); + + /* capture data */ + var |= (0x1 << PCIE_PHY_CTRL_CAP_DAT_LOC); + writel(var, dbi_base + PCIE_PHY_CTRL); + + ret = pcie_phy_poll_ack(dbi_base, 1); + if (ret) + return ret; + + /* deassert cap data */ + var = data << PCIE_PHY_CTRL_DATA_LOC; + writel(var, dbi_base + PCIE_PHY_CTRL); + + /* wait for ack de-assertion */ + ret = pcie_phy_poll_ack(dbi_base, 0); + if (ret) + return ret; + + /* assert wr signal */ + var = 0x1 << PCIE_PHY_CTRL_WR_LOC; + writel(var, dbi_base + PCIE_PHY_CTRL); + + /* wait for ack */ + ret = pcie_phy_poll_ack(dbi_base, 1); + if (ret) + return ret; + + /* deassert wr signal */ + var = data << PCIE_PHY_CTRL_DATA_LOC; + writel(var, dbi_base + PCIE_PHY_CTRL); + + /* wait for ack de-assertion */ + ret = pcie_phy_poll_ack(dbi_base, 0); + if (ret) + return ret; + + writel(0x0, dbi_base + PCIE_PHY_CTRL); + + return 0; +} + +/* Added for PCI abort handling */ +static int imx6q_pcie_abort_handler(unsigned long addr, + unsigned int fsr, struct pt_regs *regs) +{ + return 0; +} + +static int imx6_pcie_assert_core_reset(struct pcie_port *pp) +{ + struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); + + gpio_set_value(imx6_pcie->reset_gpio, 0); + msleep(100); + gpio_set_value(imx6_pcie->reset_gpio, 1); + + return 0; +} + +static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) +{ + struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp); + int ret; + + if (gpio_is_valid(imx6_pcie->power_on_gpio)) + gpio_set_value(imx6_pcie->power_on_gpio, 1); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_TEST_PD, 0 << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, + IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); + + ret = clk_prepare_enable(imx6_pcie->sata_ref_100m); + if (ret) { + dev_err(pp->dev, "unable to enable sata_ref_100m\n"); + goto err_sata_ref; + } + + ret = clk_prepare_enable(imx6_pcie->pcie_ref_125m); + if (ret) { + dev_err(pp->dev, "unable to enable pcie_ref_125m\n"); + goto err_pcie_ref; + } + + ret = clk_prepare_enable(imx6_pcie->lvds_gate); + if (ret) { + dev_err(pp->dev, "unable to enable lvds_gate\n"); + goto err_lvds_gate; + } + + ret = clk_prepare_enable(imx6_pcie->pcie_axi); + if (ret) { + dev_err(pp->dev, "unable to enable pcie_axi\n"); + goto err_pcie_axi; + } + + /* allow the clocks to stabilize */ + usleep_range(200, 500); + + return 0; + +err_pcie_axi: + clk_disable_unprepare(imx6_pcie->lvds_gate); +err_lvds_gate: + clk_disable_unprepare(imx6_pcie->pcie_ref_125m); +err_pcie_ref: + clk_disable_unprepare(imx6_pcie->sata_ref_100m); +err_sata_ref: + return ret; + +} + +static void imx6_pcie_init_phy(struct pcie_port *pp) +{ + struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 0 << 10); + + /* configure constant input signal to the pcie ctrl and phy */ + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_DEVICE_TYPE, PCI_EXP_TYPE_ROOT_PORT << 12); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_LOS_LEVEL, 9 << 4); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN1, 0 << 0); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB, 0 << 6); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB, 20 << 12); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_FULL, 127 << 18); + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8, + IMX6Q_GPR8_TX_SWING_LOW, 127 << 25); +} + +static void imx6_pcie_host_init(struct pcie_port *pp) +{ + int count = 0; + struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp); + + imx6_pcie_assert_core_reset(pp); + + imx6_pcie_init_phy(pp); + + imx6_pcie_deassert_core_reset(pp); + + dw_pcie_setup_rc(pp); + + regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); + + while (!dw_pcie_link_up(pp)) { + usleep_range(100, 1000); + count++; + if (count >= 200) { + dev_err(pp->dev, "phy link never came up\n"); + dev_dbg(pp->dev, + "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n", + readl(pp->dbi_base + PCIE_PHY_DEBUG_R0), + readl(pp->dbi_base + PCIE_PHY_DEBUG_R1)); + break; + } + } + + return; +} + +static int imx6_pcie_link_up(struct pcie_port *pp) +{ + u32 rc, ltssm, rx_valid, temp; + + /* link is debug bit 36, debug register 1 starts at bit 32 */ + rc = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1) & (0x1 << (36 - 32)); + if (rc) + return -EAGAIN; + + /* + * From L0, initiate MAC entry to gen2 if EP/RC supports gen2. + * Wait 2ms (LTSSM timeout is 24ms, PHY lock is ~5us in gen2). + * If (MAC/LTSSM.state == Recovery.RcvrLock) + * && (PHY/rx_valid==0) then pulse PHY/rx_reset. Transition + * to gen2 is stuck + */ + pcie_phy_read(pp->dbi_base, PCIE_PHY_RX_ASIC_OUT, &rx_valid); + ltssm = readl(pp->dbi_base + PCIE_PHY_DEBUG_R0) & 0x3F; + + if (rx_valid & 0x01) + return 0; + + if (ltssm != 0x0d) + return 0; + + dev_err(pp->dev, "transition to gen2 is stuck, reset PHY!\n"); + + pcie_phy_read(pp->dbi_base, + PHY_RX_OVRD_IN_LO, &temp); + temp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN + | PHY_RX_OVRD_IN_LO_RX_PLL_EN); + pcie_phy_write(pp->dbi_base, + PHY_RX_OVRD_IN_LO, temp); + + usleep_range(2000, 3000); + + pcie_phy_read(pp->dbi_base, + PHY_RX_OVRD_IN_LO, &temp); + temp &= ~(PHY_RX_OVRD_IN_LO_RX_DATA_EN + | PHY_RX_OVRD_IN_LO_RX_PLL_EN); + pcie_phy_write(pp->dbi_base, + PHY_RX_OVRD_IN_LO, temp); + + return 0; +} + +static struct pcie_host_ops imx6_pcie_host_ops = { + .link_up = imx6_pcie_link_up, + .host_init = imx6_pcie_host_init, +}; + +static int imx6_add_pcie_port(struct pcie_port *pp, + struct platform_device *pdev) +{ + int ret; + + pp->irq = platform_get_irq(pdev, 0); + if (!pp->irq) { + dev_err(&pdev->dev, "failed to get irq\n"); + return -ENODEV; + } + + pp->root_bus_nr = -1; + pp->ops = &imx6_pcie_host_ops; + + spin_lock_init(&pp->conf_lock); + ret = dw_pcie_host_init(pp); + if (ret) { + dev_err(&pdev->dev, "failed to initialize host\n"); + return ret; + } + + return 0; +} + +static int __init imx6_pcie_probe(struct platform_device *pdev) +{ + struct imx6_pcie *imx6_pcie; + struct pcie_port *pp; + struct device_node *np = pdev->dev.of_node; + struct resource *dbi_base; + int ret; + + imx6_pcie = devm_kzalloc(&pdev->dev, sizeof(*imx6_pcie), GFP_KERNEL); + if (!imx6_pcie) + return -ENOMEM; + + pp = &imx6_pcie->pp; + pp->dev = &pdev->dev; + + /* Added for PCI abort handling */ + hook_fault_code(16 + 6, imx6q_pcie_abort_handler, SIGBUS, 0, + "imprecise external abort"); + + dbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!dbi_base) { + dev_err(&pdev->dev, "dbi_base memory resource not found\n"); + return -ENODEV; + } + + pp->dbi_base = devm_ioremap_resource(&pdev->dev, dbi_base); + if (IS_ERR(pp->dbi_base)) { + ret = PTR_ERR(pp->dbi_base); + goto err; + } + + /* Fetch GPIOs */ + imx6_pcie->reset_gpio = of_get_named_gpio(np, "reset-gpio", 0); + if (!gpio_is_valid(imx6_pcie->reset_gpio)) { + dev_err(&pdev->dev, "no reset-gpio defined\n"); + ret = -ENODEV; + } + ret = devm_gpio_request_one(&pdev->dev, + imx6_pcie->reset_gpio, + GPIOF_OUT_INIT_LOW, + "PCIe reset"); + if (ret) { + dev_err(&pdev->dev, "unable to get reset gpio\n"); + goto err; + } + + imx6_pcie->power_on_gpio = of_get_named_gpio(np, "power-on-gpio", 0); + if (gpio_is_valid(imx6_pcie->power_on_gpio)) { + ret = devm_gpio_request_one(&pdev->dev, + imx6_pcie->power_on_gpio, + GPIOF_OUT_INIT_LOW, + "PCIe power enable"); + if (ret) { + dev_err(&pdev->dev, "unable to get power-on gpio\n"); + goto err; + } + } + + imx6_pcie->wake_up_gpio = of_get_named_gpio(np, "wake-up-gpio", 0); + if (gpio_is_valid(imx6_pcie->wake_up_gpio)) { + ret = devm_gpio_request_one(&pdev->dev, + imx6_pcie->wake_up_gpio, + GPIOF_IN, + "PCIe wake up"); + if (ret) { + dev_err(&pdev->dev, "unable to get wake-up gpio\n"); + goto err; + } + } + + imx6_pcie->disable_gpio = of_get_named_gpio(np, "disable-gpio", 0); + if (gpio_is_valid(imx6_pcie->disable_gpio)) { + ret = devm_gpio_request_one(&pdev->dev, + imx6_pcie->disable_gpio, + GPIOF_OUT_INIT_HIGH, + "PCIe disable endpoint"); + if (ret) { + dev_err(&pdev->dev, "unable to get disable-ep gpio\n"); + goto err; + } + } + + /* Fetch clocks */ + imx6_pcie->lvds_gate = devm_clk_get(&pdev->dev, "lvds_gate"); + if (IS_ERR(imx6_pcie->lvds_gate)) { + dev_err(&pdev->dev, + "lvds_gate clock select missing or invalid\n"); + ret = PTR_ERR(imx6_pcie->lvds_gate); + goto err; + } + + imx6_pcie->sata_ref_100m = devm_clk_get(&pdev->dev, "sata_ref_100m"); + if (IS_ERR(imx6_pcie->sata_ref_100m)) { + dev_err(&pdev->dev, + "sata_ref_100m clock source missing or invalid\n"); + ret = PTR_ERR(imx6_pcie->sata_ref_100m); + goto err; + } + + imx6_pcie->pcie_ref_125m = devm_clk_get(&pdev->dev, "pcie_ref_125m"); + if (IS_ERR(imx6_pcie->pcie_ref_125m)) { + dev_err(&pdev->dev, + "pcie_ref_125m clock source missing or invalid\n"); + ret = PTR_ERR(imx6_pcie->pcie_ref_125m); + goto err; + } + + imx6_pcie->pcie_axi = devm_clk_get(&pdev->dev, "pcie_axi"); + if (IS_ERR(imx6_pcie->pcie_axi)) { + dev_err(&pdev->dev, + "pcie_axi clock source missing or invalid\n"); + ret = PTR_ERR(imx6_pcie->pcie_axi); + goto err; + } + + /* Grab GPR config register range */ + imx6_pcie->iomuxc_gpr = + syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); + if (IS_ERR(imx6_pcie->iomuxc_gpr)) { + dev_err(&pdev->dev, "unable to find iomuxc registers\n"); + ret = PTR_ERR(imx6_pcie->iomuxc_gpr); + goto err; + } + + ret = imx6_add_pcie_port(pp, pdev); + if (ret < 0) + goto err; + + platform_set_drvdata(pdev, imx6_pcie); + return 0; + +err: + return ret; +} + +static const struct of_device_id imx6_pcie_of_match[] = { + { .compatible = "fsl,imx6q-pcie", }, + {}, +}; +MODULE_DEVICE_TABLE(of, imx6_pcie_of_match); + +static struct platform_driver imx6_pcie_driver = { + .driver = { + .name = "imx6q-pcie", + .owner = THIS_MODULE, + .of_match_table = imx6_pcie_of_match, + }, +}; + +/* Freescale PCIe driver does not allow module unload */ + +static int __init imx6_pcie_init(void) +{ + return platform_driver_probe(&imx6_pcie_driver, imx6_pcie_probe); +} +fs_initcall(imx6_pcie_init); + +MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>"); +MODULE_DESCRIPTION("Freescale i.MX6 PCIe host controller driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/pci/host/pci-rcar-gen2.c b/drivers/pci/host/pci-rcar-gen2.c new file mode 100644 index 000000000000..cbaa5c4397e3 --- /dev/null +++ b/drivers/pci/host/pci-rcar-gen2.c @@ -0,0 +1,333 @@ +/* + * pci-rcar-gen2: internal PCI bus support + * + * Copyright (C) 2013 Renesas Solutions Corp. + * Copyright (C) 2013 Cogent Embedded, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +/* AHB-PCI Bridge PCI communication registers */ +#define RCAR_AHBPCI_PCICOM_OFFSET 0x800 + +#define RCAR_PCIAHB_WIN1_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x00) +#define RCAR_PCIAHB_WIN2_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x04) +#define RCAR_PCIAHB_PREFETCH0 0x0 +#define RCAR_PCIAHB_PREFETCH4 0x1 +#define RCAR_PCIAHB_PREFETCH8 0x2 +#define RCAR_PCIAHB_PREFETCH16 0x3 + +#define RCAR_AHBPCI_WIN1_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x10) +#define RCAR_AHBPCI_WIN2_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x14) +#define RCAR_AHBPCI_WIN_CTR_MEM (3 << 1) +#define RCAR_AHBPCI_WIN_CTR_CFG (5 << 1) +#define RCAR_AHBPCI_WIN1_HOST (1 << 30) +#define RCAR_AHBPCI_WIN1_DEVICE (1 << 31) + +#define RCAR_PCI_INT_ENABLE_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x20) +#define RCAR_PCI_INT_STATUS_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x24) +#define RCAR_PCI_INT_A (1 << 16) +#define RCAR_PCI_INT_B (1 << 17) +#define RCAR_PCI_INT_PME (1 << 19) + +#define RCAR_AHB_BUS_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x30) +#define RCAR_AHB_BUS_MMODE_HTRANS (1 << 0) +#define RCAR_AHB_BUS_MMODE_BYTE_BURST (1 << 1) +#define RCAR_AHB_BUS_MMODE_WR_INCR (1 << 2) +#define RCAR_AHB_BUS_MMODE_HBUS_REQ (1 << 7) +#define RCAR_AHB_BUS_SMODE_READYCTR (1 << 17) +#define RCAR_AHB_BUS_MODE (RCAR_AHB_BUS_MMODE_HTRANS | \ + RCAR_AHB_BUS_MMODE_BYTE_BURST | \ + RCAR_AHB_BUS_MMODE_WR_INCR | \ + RCAR_AHB_BUS_MMODE_HBUS_REQ | \ + RCAR_AHB_BUS_SMODE_READYCTR) + +#define RCAR_USBCTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x34) +#define RCAR_USBCTR_USBH_RST (1 << 0) +#define RCAR_USBCTR_PCICLK_MASK (1 << 1) +#define RCAR_USBCTR_PLL_RST (1 << 2) +#define RCAR_USBCTR_DIRPD (1 << 8) +#define RCAR_USBCTR_PCIAHB_WIN2_EN (1 << 9) +#define RCAR_USBCTR_PCIAHB_WIN1_256M (0 << 10) +#define RCAR_USBCTR_PCIAHB_WIN1_512M (1 << 10) +#define RCAR_USBCTR_PCIAHB_WIN1_1G (2 << 10) +#define RCAR_USBCTR_PCIAHB_WIN1_2G (3 << 10) +#define RCAR_USBCTR_PCIAHB_WIN1_MASK (3 << 10) + +#define RCAR_PCI_ARBITER_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x40) +#define RCAR_PCI_ARBITER_PCIREQ0 (1 << 0) +#define RCAR_PCI_ARBITER_PCIREQ1 (1 << 1) +#define RCAR_PCI_ARBITER_PCIBP_MODE (1 << 12) + +#define RCAR_PCI_UNIT_REV_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x48) + +/* Number of internal PCI controllers */ +#define RCAR_PCI_NR_CONTROLLERS 3 + +struct rcar_pci_priv { + void __iomem *reg; + struct resource io_res; + struct resource mem_res; + struct resource *cfg_res; + int irq; +}; + +/* PCI configuration space operations */ +static void __iomem *rcar_pci_cfg_base(struct pci_bus *bus, unsigned int devfn, + int where) +{ + struct pci_sys_data *sys = bus->sysdata; + struct rcar_pci_priv *priv = sys->private_data; + int slot, val; + + if (sys->busnr != bus->number || PCI_FUNC(devfn)) + return NULL; + + /* Only one EHCI/OHCI device built-in */ + slot = PCI_SLOT(devfn); + if (slot > 2) + return NULL; + + val = slot ? RCAR_AHBPCI_WIN1_DEVICE | RCAR_AHBPCI_WIN_CTR_CFG : + RCAR_AHBPCI_WIN1_HOST | RCAR_AHBPCI_WIN_CTR_CFG; + + iowrite32(val, priv->reg + RCAR_AHBPCI_WIN1_CTR_REG); + return priv->reg + (slot >> 1) * 0x100 + where; +} + +static int rcar_pci_read_config(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + void __iomem *reg = rcar_pci_cfg_base(bus, devfn, where); + + if (!reg) + return PCIBIOS_DEVICE_NOT_FOUND; + + switch (size) { + case 1: + *val = ioread8(reg); + break; + case 2: + *val = ioread16(reg); + break; + default: + *val = ioread32(reg); + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +static int rcar_pci_write_config(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + void __iomem *reg = rcar_pci_cfg_base(bus, devfn, where); + + if (!reg) + return PCIBIOS_DEVICE_NOT_FOUND; + + switch (size) { + case 1: + iowrite8(val, reg); + break; + case 2: + iowrite16(val, reg); + break; + default: + iowrite32(val, reg); + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +/* PCI interrupt mapping */ +static int __init rcar_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + struct pci_sys_data *sys = dev->bus->sysdata; + struct rcar_pci_priv *priv = sys->private_data; + + return priv->irq; +} + +/* PCI host controller setup */ +static int __init rcar_pci_setup(int nr, struct pci_sys_data *sys) +{ + struct rcar_pci_priv *priv = sys->private_data; + void __iomem *reg = priv->reg; + u32 val; + + val = ioread32(reg + RCAR_PCI_UNIT_REV_REG); + pr_info("PCI: bus%u revision %x\n", sys->busnr, val); + + /* Disable Direct Power Down State and assert reset */ + val = ioread32(reg + RCAR_USBCTR_REG) & ~RCAR_USBCTR_DIRPD; + val |= RCAR_USBCTR_USBH_RST | RCAR_USBCTR_PLL_RST; + iowrite32(val, reg + RCAR_USBCTR_REG); + udelay(4); + + /* De-assert reset and set PCIAHB window1 size to 1GB */ + val &= ~(RCAR_USBCTR_PCIAHB_WIN1_MASK | RCAR_USBCTR_PCICLK_MASK | + RCAR_USBCTR_USBH_RST | RCAR_USBCTR_PLL_RST); + iowrite32(val | RCAR_USBCTR_PCIAHB_WIN1_1G, reg + RCAR_USBCTR_REG); + + /* Configure AHB master and slave modes */ + iowrite32(RCAR_AHB_BUS_MODE, reg + RCAR_AHB_BUS_CTR_REG); + + /* Configure PCI arbiter */ + val = ioread32(reg + RCAR_PCI_ARBITER_CTR_REG); + val |= RCAR_PCI_ARBITER_PCIREQ0 | RCAR_PCI_ARBITER_PCIREQ1 | + RCAR_PCI_ARBITER_PCIBP_MODE; + iowrite32(val, reg + RCAR_PCI_ARBITER_CTR_REG); + + /* PCI-AHB mapping: 0x40000000-0x80000000 */ + iowrite32(0x40000000 | RCAR_PCIAHB_PREFETCH16, + reg + RCAR_PCIAHB_WIN1_CTR_REG); + + /* AHB-PCI mapping: OHCI/EHCI registers */ + val = priv->mem_res.start | RCAR_AHBPCI_WIN_CTR_MEM; + iowrite32(val, reg + RCAR_AHBPCI_WIN2_CTR_REG); + + /* Enable AHB-PCI bridge PCI configuration access */ + iowrite32(RCAR_AHBPCI_WIN1_HOST | RCAR_AHBPCI_WIN_CTR_CFG, + reg + RCAR_AHBPCI_WIN1_CTR_REG); + /* Set PCI-AHB Window1 address */ + iowrite32(0x40000000 | PCI_BASE_ADDRESS_MEM_PREFETCH, + reg + PCI_BASE_ADDRESS_1); + /* Set AHB-PCI bridge PCI communication area address */ + val = priv->cfg_res->start + RCAR_AHBPCI_PCICOM_OFFSET; + iowrite32(val, reg + PCI_BASE_ADDRESS_0); + + val = ioread32(reg + PCI_COMMAND); + val |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | + PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER; + iowrite32(val, reg + PCI_COMMAND); + + /* Enable PCI interrupts */ + iowrite32(RCAR_PCI_INT_A | RCAR_PCI_INT_B | RCAR_PCI_INT_PME, + reg + RCAR_PCI_INT_ENABLE_REG); + + /* Add PCI resources */ + pci_add_resource(&sys->resources, &priv->io_res); + pci_add_resource(&sys->resources, &priv->mem_res); + + return 1; +} + +static struct pci_ops rcar_pci_ops = { + .read = rcar_pci_read_config, + .write = rcar_pci_write_config, +}; + +static struct hw_pci rcar_hw_pci __initdata = { + .map_irq = rcar_pci_map_irq, + .ops = &rcar_pci_ops, + .setup = rcar_pci_setup, +}; + +static int rcar_pci_count __initdata; + +static int __init rcar_pci_add_controller(struct rcar_pci_priv *priv) +{ + void **private_data; + int count; + + if (rcar_hw_pci.nr_controllers < rcar_pci_count) + goto add_priv; + + /* (Re)allocate private data pointer array if needed */ + count = rcar_pci_count + RCAR_PCI_NR_CONTROLLERS; + private_data = kzalloc(count * sizeof(void *), GFP_KERNEL); + if (!private_data) + return -ENOMEM; + + rcar_pci_count = count; + if (rcar_hw_pci.private_data) { + memcpy(private_data, rcar_hw_pci.private_data, + rcar_hw_pci.nr_controllers * sizeof(void *)); + kfree(rcar_hw_pci.private_data); + } + + rcar_hw_pci.private_data = private_data; + +add_priv: + /* Add private data pointer to the array */ + rcar_hw_pci.private_data[rcar_hw_pci.nr_controllers++] = priv; + return 0; +} + +static int __init rcar_pci_probe(struct platform_device *pdev) +{ + struct resource *cfg_res, *mem_res; + struct rcar_pci_priv *priv; + void __iomem *reg; + + cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reg = devm_ioremap_resource(&pdev->dev, cfg_res); + if (!reg) + return -ENODEV; + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!mem_res || !mem_res->start) + return -ENODEV; + + priv = devm_kzalloc(&pdev->dev, + sizeof(struct rcar_pci_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->mem_res = *mem_res; + /* + * The controller does not support/use port I/O, + * so setup a dummy port I/O region here. + */ + priv->io_res.start = priv->mem_res.start; + priv->io_res.end = priv->mem_res.end; + priv->io_res.flags = IORESOURCE_IO; + + priv->cfg_res = cfg_res; + + priv->irq = platform_get_irq(pdev, 0); + priv->reg = reg; + + return rcar_pci_add_controller(priv); +} + +static struct platform_driver rcar_pci_driver = { + .driver = { + .name = "pci-rcar-gen2", + }, +}; + +static int __init rcar_pci_init(void) +{ + int retval; + + retval = platform_driver_probe(&rcar_pci_driver, rcar_pci_probe); + if (!retval) + pci_common_init(&rcar_hw_pci); + + /* Private data pointer array is not needed any more */ + kfree(rcar_hw_pci.private_data); + rcar_hw_pci.private_data = NULL; + + return retval; +} + +subsys_initcall(rcar_pci_init); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Renesas R-Car Gen2 internal PCI"); +MODULE_AUTHOR("Valentine Barshak <valentine.barshak@cogentembedded.com>"); diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 2e9888a0635a..7c4f38dd42ba 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -408,7 +408,7 @@ static void __iomem *tegra_pcie_bus_map(struct tegra_pcie *pcie, list_for_each_entry(bus, &pcie->busses, list) if (bus->nr == busnr) - return bus->area->addr; + return (void __iomem *)bus->area->addr; bus = tegra_pcie_bus_alloc(pcie, busnr); if (IS_ERR(bus)) @@ -416,7 +416,7 @@ static void __iomem *tegra_pcie_bus_map(struct tegra_pcie *pcie, list_add_tail(&bus->list, &pcie->busses); - return bus->area->addr; + return (void __iomem *)bus->area->addr; } static void __iomem *tegra_pcie_conf_address(struct pci_bus *bus, diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index c10e9ac9bbbc..1e1fea4d959b 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -11,8 +11,11 @@ * published by the Free Software Foundation. */ +#include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/msi.h> #include <linux/of_address.h> #include <linux/pci.h> #include <linux/pci_regs.h> @@ -64,7 +67,7 @@ static struct hw_pci dw_pci; -unsigned long global_io_offset; +static unsigned long global_io_offset; static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys) { @@ -115,8 +118,8 @@ static inline void dw_pcie_writel_rc(struct pcie_port *pp, u32 val, u32 reg) writel(val, pp->dbi_base + reg); } -int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, - u32 *val) +static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, + u32 *val) { int ret; @@ -128,8 +131,8 @@ int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, return ret; } -int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, - u32 val) +static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, + u32 val) { int ret; @@ -142,6 +145,205 @@ int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, return ret; } +static struct irq_chip dw_msi_irq_chip = { + .name = "PCI-MSI", + .irq_enable = unmask_msi_irq, + .irq_disable = mask_msi_irq, + .irq_mask = mask_msi_irq, + .irq_unmask = unmask_msi_irq, +}; + +/* MSI int handler */ +void dw_handle_msi_irq(struct pcie_port *pp) +{ + unsigned long val; + int i, pos, irq; + + for (i = 0; i < MAX_MSI_CTRLS; i++) { + dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4, + (u32 *)&val); + if (val) { + pos = 0; + while ((pos = find_next_bit(&val, 32, pos)) != 32) { + irq = irq_find_mapping(pp->irq_domain, + i * 32 + pos); + generic_handle_irq(irq); + pos++; + } + } + dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4, val); + } +} + +void dw_pcie_msi_init(struct pcie_port *pp) +{ + pp->msi_data = __get_free_pages(GFP_KERNEL, 0); + + /* program the msi_data */ + dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4, + virt_to_phys((void *)pp->msi_data)); + dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_HI, 4, 0); +} + +static int find_valid_pos0(struct pcie_port *pp, int msgvec, int pos, int *pos0) +{ + int flag = 1; + + do { + pos = find_next_zero_bit(pp->msi_irq_in_use, + MAX_MSI_IRQS, pos); + /*if you have reached to the end then get out from here.*/ + if (pos == MAX_MSI_IRQS) + return -ENOSPC; + /* + * Check if this position is at correct offset.nvec is always a + * power of two. pos0 must be nvec bit alligned. + */ + if (pos % msgvec) + pos += msgvec - (pos % msgvec); + else + flag = 0; + } while (flag); + + *pos0 = pos; + return 0; +} + +static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos) +{ + int res, bit, irq, pos0, pos1, i; + u32 val; + struct pcie_port *pp = sys_to_pcie(desc->dev->bus->sysdata); + + if (!pp) { + BUG(); + return -EINVAL; + } + + pos0 = find_first_zero_bit(pp->msi_irq_in_use, + MAX_MSI_IRQS); + if (pos0 % no_irqs) { + if (find_valid_pos0(pp, no_irqs, pos0, &pos0)) + goto no_valid_irq; + } + if (no_irqs > 1) { + pos1 = find_next_bit(pp->msi_irq_in_use, + MAX_MSI_IRQS, pos0); + /* there must be nvec number of consecutive free bits */ + while ((pos1 - pos0) < no_irqs) { + if (find_valid_pos0(pp, no_irqs, pos1, &pos0)) + goto no_valid_irq; + pos1 = find_next_bit(pp->msi_irq_in_use, + MAX_MSI_IRQS, pos0); + } + } + + irq = irq_find_mapping(pp->irq_domain, pos0); + if (!irq) + goto no_valid_irq; + + i = 0; + while (i < no_irqs) { + set_bit(pos0 + i, pp->msi_irq_in_use); + irq_alloc_descs((irq + i), (irq + i), 1, 0); + irq_set_msi_desc(irq + i, desc); + /*Enable corresponding interrupt in MSI interrupt controller */ + res = ((pos0 + i) / 32) * 12; + bit = (pos0 + i) % 32; + dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val); + val |= 1 << bit; + dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val); + i++; + } + + *pos = pos0; + return irq; + +no_valid_irq: + *pos = pos0; + return -ENOSPC; +} + +static void clear_irq(unsigned int irq) +{ + int res, bit, val, pos; + struct irq_desc *desc; + struct msi_desc *msi; + struct pcie_port *pp; + struct irq_data *data = irq_get_irq_data(irq); + + /* get the port structure */ + desc = irq_to_desc(irq); + msi = irq_desc_get_msi_desc(desc); + pp = sys_to_pcie(msi->dev->bus->sysdata); + if (!pp) { + BUG(); + return; + } + + pos = data->hwirq; + + irq_free_desc(irq); + + clear_bit(pos, pp->msi_irq_in_use); + + /* Disable corresponding interrupt on MSI interrupt controller */ + res = (pos / 32) * 12; + bit = pos % 32; + dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val); + val &= ~(1 << bit); + dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val); +} + +static int dw_msi_setup_irq(struct msi_chip *chip, struct pci_dev *pdev, + struct msi_desc *desc) +{ + int irq, pos, msgvec; + u16 msg_ctr; + struct msi_msg msg; + struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata); + + if (!pp) { + BUG(); + return -EINVAL; + } + + pci_read_config_word(pdev, desc->msi_attrib.pos+PCI_MSI_FLAGS, + &msg_ctr); + msgvec = (msg_ctr&PCI_MSI_FLAGS_QSIZE) >> 4; + if (msgvec == 0) + msgvec = (msg_ctr & PCI_MSI_FLAGS_QMASK) >> 1; + if (msgvec > 5) + msgvec = 0; + + irq = assign_irq((1 << msgvec), desc, &pos); + if (irq < 0) + return irq; + + msg_ctr &= ~PCI_MSI_FLAGS_QSIZE; + msg_ctr |= msgvec << 4; + pci_write_config_word(pdev, desc->msi_attrib.pos + PCI_MSI_FLAGS, + msg_ctr); + desc->msi_attrib.multiple = msgvec; + + msg.address_lo = virt_to_phys((void *)pp->msi_data); + msg.address_hi = 0x0; + msg.data = pos; + write_msi_msg(irq, &msg); + + return 0; +} + +static void dw_msi_teardown_irq(struct msi_chip *chip, unsigned int irq) +{ + clear_irq(irq); +} + +static struct msi_chip dw_pcie_msi_chip = { + .setup_irq = dw_msi_setup_irq, + .teardown_irq = dw_msi_teardown_irq, +}; + int dw_pcie_link_up(struct pcie_port *pp) { if (pp->ops->link_up) @@ -150,12 +352,27 @@ int dw_pcie_link_up(struct pcie_port *pp) return 0; } +static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq); + irq_set_chip_data(irq, domain->host_data); + set_irq_flags(irq, IRQF_VALID); + + return 0; +} + +static const struct irq_domain_ops msi_domain_ops = { + .map = dw_pcie_msi_map, +}; + int __init dw_pcie_host_init(struct pcie_port *pp) { struct device_node *np = pp->dev->of_node; struct of_pci_range range; struct of_pci_range_parser parser; u32 val; + int i; if (of_pci_range_parser_init(&parser, np)) { dev_err(pp->dev, "missing ranges property\n"); @@ -223,6 +440,19 @@ int __init dw_pcie_host_init(struct pcie_port *pp) return -EINVAL; } + if (IS_ENABLED(CONFIG_PCI_MSI)) { + pp->irq_domain = irq_domain_add_linear(pp->dev->of_node, + MAX_MSI_IRQS, &msi_domain_ops, + &dw_pcie_msi_chip); + if (!pp->irq_domain) { + dev_err(pp->dev, "irq domain init failed\n"); + return -ENXIO; + } + + for (i = 0; i < MAX_MSI_IRQS; i++) + irq_create_mapping(pp->irq_domain, i); + } + if (pp->ops->host_init) pp->ops->host_init(pp); @@ -438,7 +668,7 @@ static struct pci_ops dw_pcie_ops = { .write = dw_pcie_wr_conf, }; -int dw_pcie_setup(int nr, struct pci_sys_data *sys) +static int dw_pcie_setup(int nr, struct pci_sys_data *sys) { struct pcie_port *pp; @@ -461,7 +691,7 @@ int dw_pcie_setup(int nr, struct pci_sys_data *sys) return 1; } -struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) +static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) { struct pci_bus *bus; struct pcie_port *pp = sys_to_pcie(sys); @@ -478,17 +708,28 @@ struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) return bus; } -int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata); return pp->irq; } +static void dw_pcie_add_bus(struct pci_bus *bus) +{ + if (IS_ENABLED(CONFIG_PCI_MSI)) { + struct pcie_port *pp = sys_to_pcie(bus->sysdata); + + dw_pcie_msi_chip.dev = pp->dev; + bus->msi = &dw_pcie_msi_chip; + } +} + static struct hw_pci dw_pci = { .setup = dw_pcie_setup, .scan = dw_pcie_scan_bus, .map_irq = dw_pcie_map_irq, + .add_bus = dw_pcie_add_bus, }; void dw_pcie_setup_rc(struct pcie_port *pp) diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h index 133820f1da97..c15379be2372 100644 --- a/drivers/pci/host/pcie-designware.h +++ b/drivers/pci/host/pcie-designware.h @@ -11,6 +11,9 @@ * published by the Free Software Foundation. */ +#ifndef _PCIE_DESIGNWARE_H +#define _PCIE_DESIGNWARE_H + struct pcie_port_info { u32 cfg0_size; u32 cfg1_size; @@ -20,6 +23,14 @@ struct pcie_port_info { phys_addr_t mem_bus_addr; }; +/* + * Maximum number of MSI IRQs can be 256 per controller. But keep + * it 32 as of now. Probably we will never need more than 32. If needed, + * then increment it in multiple of 32. + */ +#define MAX_MSI_IRQS 32 +#define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32) + struct pcie_port { struct device *dev; u8 root_bus_nr; @@ -38,6 +49,10 @@ struct pcie_port { int irq; u32 lanes; struct pcie_host_ops *ops; + int msi_irq; + struct irq_domain *irq_domain; + unsigned long msi_data; + DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); }; struct pcie_host_ops { @@ -51,15 +66,12 @@ struct pcie_host_ops { void (*host_init)(struct pcie_port *pp); }; -extern unsigned long global_io_offset; - int cfg_read(void __iomem *addr, int where, int size, u32 *val); int cfg_write(void __iomem *addr, int where, int size, u32 val); -int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, u32 val); -int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, u32 *val); +void dw_handle_msi_irq(struct pcie_port *pp); +void dw_pcie_msi_init(struct pcie_port *pp); int dw_pcie_link_up(struct pcie_port *pp); void dw_pcie_setup_rc(struct pcie_port *pp); int dw_pcie_host_init(struct pcie_port *pp); -int dw_pcie_setup(int nr, struct pci_sys_data *sys); -struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys); -int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin); + +#endif /* _PCIE_DESIGNWARE_H */ diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c index 2a47e82821da..f8140164ec0b 100644 --- a/drivers/pci/hotplug/acpi_pcihp.c +++ b/drivers/pci/hotplug/acpi_pcihp.c @@ -338,7 +338,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags) acpi_handle chandle, handle; struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; - flags &= OSC_SHPC_NATIVE_HP_CONTROL; + flags &= OSC_PCI_SHPC_NATIVE_HP_CONTROL; if (!flags) { err("Invalid flags %u specified!\n", flags); return -EINVAL; diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h index e260f207a90e..d876e4b3c6a9 100644 --- a/drivers/pci/hotplug/shpchp.h +++ b/drivers/pci/hotplug/shpchp.h @@ -191,7 +191,7 @@ static inline const char *slot_name(struct slot *slot) #include <linux/pci-acpi.h> static inline int get_hp_hw_control_from_firmware(struct pci_dev *dev) { - u32 flags = OSC_SHPC_NATIVE_HP_CONTROL; + u32 flags = OSC_PCI_SHPC_NATIVE_HP_CONTROL; return acpi_get_hp_hw_control_from_firmware(dev, flags); } #else diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 0929ae3e7830..454853507b7e 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -135,6 +135,7 @@ store_new_id(struct device_driver *driver, const char *buf, size_t count) return retval; return count; } +static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); /** * store_remove_id - remove a PCI device ID from this driver @@ -180,12 +181,14 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count) return retval; return count; } +static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); -static struct driver_attribute pci_drv_attrs[] = { - __ATTR(new_id, S_IWUSR, NULL, store_new_id), - __ATTR(remove_id, S_IWUSR, NULL, store_remove_id), - __ATTR_NULL, +static struct attribute *pci_drv_attrs[] = { + &driver_attr_new_id.attr, + &driver_attr_remove_id.attr, + NULL, }; +ATTRIBUTE_GROUPS(pci_drv); /** * pci_match_id - See if a pci device matches a given pci_id table @@ -1315,9 +1318,9 @@ struct bus_type pci_bus_type = { .probe = pci_device_probe, .remove = pci_device_remove, .shutdown = pci_device_shutdown, - .dev_attrs = pci_dev_attrs, - .bus_attrs = pci_bus_attrs, - .drv_attrs = pci_drv_attrs, + .dev_groups = pci_dev_groups, + .bus_groups = pci_bus_groups, + .drv_groups = pci_drv_groups, .pm = PCI_PM_OPS_PTR, }; diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index d9252dd89ea9..2aaa83c85a4e 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -42,7 +42,8 @@ field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ \ pdev = to_pci_dev (dev); \ return sprintf (buf, format_string, pdev->field); \ -} +} \ +static DEVICE_ATTR_RO(field) pci_config_attr(vendor, "0x%04x\n"); pci_config_attr(device, "0x%04x\n"); @@ -73,6 +74,7 @@ static ssize_t broken_parity_status_store(struct device *dev, return count; } +static DEVICE_ATTR_RW(broken_parity_status); static ssize_t pci_dev_show_local_cpu(struct device *dev, int type, @@ -102,12 +104,14 @@ static ssize_t local_cpus_show(struct device *dev, { return pci_dev_show_local_cpu(dev, 1, attr, buf); } +static DEVICE_ATTR_RO(local_cpus); static ssize_t local_cpulist_show(struct device *dev, struct device_attribute *attr, char *buf) { return pci_dev_show_local_cpu(dev, 0, attr, buf); } +static DEVICE_ATTR_RO(local_cpulist); /* * PCI Bus Class Devices @@ -168,6 +172,7 @@ resource_show(struct device * dev, struct device_attribute *attr, char * buf) } return (str - buf); } +static DEVICE_ATTR_RO(resource); static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -179,10 +184,11 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8), (u8)(pci_dev->class)); } +static DEVICE_ATTR_RO(modalias); -static ssize_t is_enabled_store(struct device *dev, - struct device_attribute *attr, const char *buf, - size_t count) +static ssize_t enabled_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) { struct pci_dev *pdev = to_pci_dev(dev); unsigned long val; @@ -206,14 +212,15 @@ static ssize_t is_enabled_store(struct device *dev, return result < 0 ? result : count; } -static ssize_t is_enabled_show(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t enabled_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct pci_dev *pdev; pdev = to_pci_dev (dev); return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt)); } +static DEVICE_ATTR_RW(enabled); #ifdef CONFIG_NUMA static ssize_t @@ -221,6 +228,7 @@ numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf (buf, "%d\n", dev->numa_node); } +static DEVICE_ATTR_RO(numa_node); #endif static ssize_t @@ -230,6 +238,7 @@ dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf) return sprintf (buf, "%d\n", fls64(pdev->dma_mask)); } +static DEVICE_ATTR_RO(dma_mask_bits); static ssize_t consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, @@ -237,6 +246,7 @@ consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr, { return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask)); } +static DEVICE_ATTR_RO(consistent_dma_mask_bits); static ssize_t msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -281,6 +291,7 @@ msi_bus_store(struct device *dev, struct device_attribute *attr, return count; } +static DEVICE_ATTR_RW(msi_bus); static DEFINE_MUTEX(pci_remove_rescan_mutex); static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, @@ -300,10 +311,20 @@ static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf, } return count; } +static BUS_ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store); + +static struct attribute *pci_bus_attrs[] = { + &bus_attr_rescan.attr, + NULL, +}; + +static const struct attribute_group pci_bus_group = { + .attrs = pci_bus_attrs, +}; -struct bus_attribute pci_bus_attrs[] = { - __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store), - __ATTR_NULL +const struct attribute_group *pci_bus_groups[] = { + &pci_bus_group, + NULL, }; static ssize_t @@ -323,8 +344,9 @@ dev_rescan_store(struct device *dev, struct device_attribute *attr, } return count; } -struct device_attribute dev_rescan_attr = __ATTR(rescan, (S_IWUSR|S_IWGRP), - NULL, dev_rescan_store); +static struct device_attribute dev_rescan_attr = __ATTR(rescan, + (S_IWUSR|S_IWGRP), + NULL, dev_rescan_store); static void remove_callback(struct device *dev) { @@ -354,8 +376,9 @@ remove_store(struct device *dev, struct device_attribute *dummy, count = ret; return count; } -struct device_attribute dev_remove_attr = __ATTR(remove, (S_IWUSR|S_IWGRP), - NULL, remove_store); +static struct device_attribute dev_remove_attr = __ATTR(remove, + (S_IWUSR|S_IWGRP), + NULL, remove_store); static ssize_t dev_bus_rescan_store(struct device *dev, struct device_attribute *attr, @@ -402,6 +425,7 @@ static ssize_t d3cold_allowed_show(struct device *dev, struct pci_dev *pdev = to_pci_dev(dev); return sprintf (buf, "%u\n", pdev->d3cold_allowed); } +static DEVICE_ATTR_RW(d3cold_allowed); #endif #ifdef CONFIG_PCI_IOV @@ -487,30 +511,38 @@ static struct device_attribute sriov_numvfs_attr = sriov_numvfs_show, sriov_numvfs_store); #endif /* CONFIG_PCI_IOV */ -struct device_attribute pci_dev_attrs[] = { - __ATTR_RO(resource), - __ATTR_RO(vendor), - __ATTR_RO(device), - __ATTR_RO(subsystem_vendor), - __ATTR_RO(subsystem_device), - __ATTR_RO(class), - __ATTR_RO(irq), - __ATTR_RO(local_cpus), - __ATTR_RO(local_cpulist), - __ATTR_RO(modalias), +static struct attribute *pci_dev_attrs[] = { + &dev_attr_resource.attr, + &dev_attr_vendor.attr, + &dev_attr_device.attr, + &dev_attr_subsystem_vendor.attr, + &dev_attr_subsystem_device.attr, + &dev_attr_class.attr, + &dev_attr_irq.attr, + &dev_attr_local_cpus.attr, + &dev_attr_local_cpulist.attr, + &dev_attr_modalias.attr, #ifdef CONFIG_NUMA - __ATTR_RO(numa_node), + &dev_attr_numa_node.attr, #endif - __ATTR_RO(dma_mask_bits), - __ATTR_RO(consistent_dma_mask_bits), - __ATTR(enable, 0600, is_enabled_show, is_enabled_store), - __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR), - broken_parity_status_show,broken_parity_status_store), - __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store), + &dev_attr_dma_mask_bits.attr, + &dev_attr_consistent_dma_mask_bits.attr, + &dev_attr_enabled.attr, + &dev_attr_broken_parity_status.attr, + &dev_attr_msi_bus.attr, #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) - __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store), + &dev_attr_d3cold_allowed.attr, #endif - __ATTR_NULL, + NULL, +}; + +static const struct attribute_group pci_dev_group = { + .attrs = pci_dev_attrs, +}; + +const struct attribute_group *pci_dev_groups[] = { + &pci_dev_group, + NULL, }; static struct attribute *pcibus_attrs[] = { @@ -542,7 +574,7 @@ boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) !!(pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)); } -struct device_attribute vga_attr = __ATTR_RO(boot_vga); +static struct device_attribute vga_attr = __ATTR_RO(boot_vga); static ssize_t pci_read_config(struct file *filp, struct kobject *kobj, diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index d3ed931c0770..b127fbda6fc8 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3980,6 +3980,7 @@ int pcie_get_mps(struct pci_dev *dev) return 128 << ((ctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5); } +EXPORT_SYMBOL(pcie_get_mps); /** * pcie_set_mps - set PCI Express maximum payload size @@ -4004,6 +4005,7 @@ int pcie_set_mps(struct pci_dev *dev, int mps) return pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_PAYLOAD, v); } +EXPORT_SYMBOL(pcie_set_mps); /** * pcie_get_minimum_link - determine minimum link settings of a PCI device diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 8a00c063d7bc..9c91ecc1301b 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -153,10 +153,10 @@ static inline int pci_no_d1d2(struct pci_dev *dev) return (dev->no_d1d2 || parent_dstates); } -extern struct device_attribute pci_dev_attrs[]; +extern const struct attribute_group *pci_dev_groups[]; extern const struct attribute_group *pcibus_groups[]; extern struct device_type pci_dev_type; -extern struct bus_attribute pci_bus_attrs[]; +extern const struct attribute_group *pci_bus_groups[]; /** diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2372babe2fc5..5e14f5a51357 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -641,8 +641,7 @@ static void pci_set_bus_speed(struct pci_bus *bus) return; } - pos = pci_find_capability(bridge, PCI_CAP_ID_EXP); - if (pos) { + if (pci_is_pcie(bridge)) { u32 linkcap; u16 linksta; diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index f8ca7becacca..7591fa4e28bb 100644 --- a/drivers/scsi/bfa/bfad.c +++ b/drivers/scsi/bfa/bfad.c @@ -766,49 +766,20 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad) bfad->pcidev = pdev; /* Adjust PCIe Maximum Read Request Size */ - if (pcie_max_read_reqsz > 0) { - int pcie_cap_reg; - u16 pcie_dev_ctl; - u16 mask = 0xffff; - - switch (pcie_max_read_reqsz) { - case 128: - mask = 0x0; - break; - case 256: - mask = 0x1000; - break; - case 512: - mask = 0x2000; - break; - case 1024: - mask = 0x3000; - break; - case 2048: - mask = 0x4000; - break; - case 4096: - mask = 0x5000; - break; - default: - break; - } - - pcie_cap_reg = pci_find_capability(pdev, PCI_CAP_ID_EXP); - if (mask != 0xffff && pcie_cap_reg) { - pcie_cap_reg += 0x08; - pci_read_config_word(pdev, pcie_cap_reg, &pcie_dev_ctl); - if ((pcie_dev_ctl & 0x7000) != mask) { - printk(KERN_WARNING "BFA[%s]: " + if (pci_is_pcie(pdev) && pcie_max_read_reqsz) { + if (pcie_max_read_reqsz >= 128 && + pcie_max_read_reqsz <= 4096 && + is_power_of_2(pcie_max_read_reqsz)) { + int max_rq = pcie_get_readrq(pdev); + printk(KERN_WARNING "BFA[%s]: " "pcie_max_read_request_size is %d, " - "reset to %d\n", bfad->pci_name, - (1 << ((pcie_dev_ctl & 0x7000) >> 12)) << 7, + "reset to %d\n", bfad->pci_name, max_rq, pcie_max_read_reqsz); - - pcie_dev_ctl &= ~0x7000; - pci_write_config_word(pdev, pcie_cap_reg, - pcie_dev_ctl | mask); - } + pcie_set_readrq(pdev, pcie_max_read_reqsz); + } else { + printk(KERN_WARNING "BFA[%s]: invalid " + "pcie_max_read_request_size %d ignored\n", + bfad->pci_name, pcie_max_read_reqsz); } } diff --git a/drivers/scsi/csiostor/csio_hw.c b/drivers/scsi/csiostor/csio_hw.c index 0eb35b9b3784..0eaec4748957 100644 --- a/drivers/scsi/csiostor/csio_hw.c +++ b/drivers/scsi/csiostor/csio_hw.c @@ -852,22 +852,6 @@ csio_hw_get_flash_params(struct csio_hw *hw) return 0; } -static void -csio_set_pcie_completion_timeout(struct csio_hw *hw, u8 range) -{ - uint16_t val; - int pcie_cap; - - if (!csio_pci_capability(hw->pdev, PCI_CAP_ID_EXP, &pcie_cap)) { - pci_read_config_word(hw->pdev, - pcie_cap + PCI_EXP_DEVCTL2, &val); - val &= 0xfff0; - val |= range ; - pci_write_config_word(hw->pdev, - pcie_cap + PCI_EXP_DEVCTL2, val); - } -} - /*****************************************************************************/ /* HW State machine assists */ /*****************************************************************************/ @@ -2069,8 +2053,10 @@ csio_hw_configure(struct csio_hw *hw) goto out; } - /* Set pci completion timeout value to 4 seconds. */ - csio_set_pcie_completion_timeout(hw, 0xd); + /* Set PCIe completion timeout to 4 seconds */ + if (pci_is_pcie(hw->pdev)) + pcie_capability_clear_and_set_word(hw->pdev, PCI_EXP_DEVCTL2, + PCI_EXP_DEVCTL2_COMP_TIMEOUT, 0xd); hw->chip_ops->chip_set_mem_win(hw, MEMWIN_CSIOSTOR); diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c index 62ee7131b204..30d20e74e48a 100644 --- a/drivers/scsi/qla2xxx/qla_mr.c +++ b/drivers/scsi/qla2xxx/qla_mr.c @@ -507,7 +507,7 @@ qlafx00_pci_config(scsi_qla_host_t *vha) pci_write_config_word(ha->pdev, PCI_COMMAND, w); /* PCIe -- adjust Maximum Read Request Size (2048). */ - if (pci_find_capability(ha->pdev, PCI_CAP_ID_EXP)) + if (pci_is_pcie(ha->pdev)) pcie_set_readrq(ha->pdev, 2048); ha->chip_revision = ha->pdev->revision; @@ -660,10 +660,8 @@ char * qlafx00_pci_info_str(struct scsi_qla_host *vha, char *str) { struct qla_hw_data *ha = vha->hw; - int pcie_reg; - pcie_reg = pci_find_capability(ha->pdev, PCI_CAP_ID_EXP); - if (pcie_reg) { + if (pci_is_pcie(ha->pdev)) { strcpy(str, "PCIe iSA"); return str; } diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c index f73e58f5ef8d..876881d1826e 100644 --- a/drivers/staging/et131x/et131x.c +++ b/drivers/staging/et131x/et131x.c @@ -3605,17 +3605,10 @@ static int et131x_pci_init(struct et131x_adapter *adapter, goto err_out; } - /* Let's set up the PORT LOGIC Register. First we need to know what - * the max_payload_size is - */ - if (pcie_capability_read_word(pdev, PCI_EXP_DEVCAP, &max_payload)) { - dev_err(&pdev->dev, - "Could not read PCI config space for Max Payload Size\n"); - goto err_out; - } + /* Let's set up the PORT LOGIC Register. */ /* Program the Ack/Nak latency and replay timers */ - max_payload &= 0x07; + max_payload = pdev->pcie_mpss; if (max_payload < 2) { static const u16 acknak[2] = { 0x76, 0xD0 }; @@ -3645,8 +3638,7 @@ static int et131x_pci_init(struct et131x_adapter *adapter, } /* Change the max read size to 2k */ - if (pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL, - PCI_EXP_DEVCTL_READRQ, 0x4 << 12)) { + if (pcie_set_readrq(pdev, 2048)) { dev_err(&pdev->dev, "Couldn't change PCI config space for Max read size\n"); goto err_out; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a5db4aeefa36..e2e52cf53224 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -294,58 +294,51 @@ void __init acpi_nvs_nosave_s3(void); #endif /* CONFIG_PM_SLEEP */ struct acpi_osc_context { - char *uuid_str; /* uuid string */ + char *uuid_str; /* UUID string */ int rev; - struct acpi_buffer cap; /* arg2/arg3 */ - struct acpi_buffer ret; /* free by caller if success */ + struct acpi_buffer cap; /* list of DWORD capabilities */ + struct acpi_buffer ret; /* free by caller if success */ }; -#define OSC_QUERY_TYPE 0 -#define OSC_SUPPORT_TYPE 1 -#define OSC_CONTROL_TYPE 2 - -/* _OSC DW0 Definition */ -#define OSC_QUERY_ENABLE 1 -#define OSC_REQUEST_ERROR 2 -#define OSC_INVALID_UUID_ERROR 4 -#define OSC_INVALID_REVISION_ERROR 8 -#define OSC_CAPABILITIES_MASK_ERROR 16 - acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); -/* platform-wide _OSC bits */ -#define OSC_SB_PAD_SUPPORT 1 -#define OSC_SB_PPC_OST_SUPPORT 2 -#define OSC_SB_PR3_SUPPORT 4 -#define OSC_SB_HOTPLUG_OST_SUPPORT 8 -#define OSC_SB_APEI_SUPPORT 16 +/* Indexes into _OSC Capabilities Buffer (DWORDs 2 & 3 are device-specific) */ +#define OSC_QUERY_DWORD 0 /* DWORD 1 */ +#define OSC_SUPPORT_DWORD 1 /* DWORD 2 */ +#define OSC_CONTROL_DWORD 2 /* DWORD 3 */ + +/* _OSC Capabilities DWORD 1: Query/Control and Error Returns (generic) */ +#define OSC_QUERY_ENABLE 0x00000001 /* input */ +#define OSC_REQUEST_ERROR 0x00000002 /* return */ +#define OSC_INVALID_UUID_ERROR 0x00000004 /* return */ +#define OSC_INVALID_REVISION_ERROR 0x00000008 /* return */ +#define OSC_CAPABILITIES_MASK_ERROR 0x00000010 /* return */ + +/* Platform-Wide Capabilities _OSC: Capabilities DWORD 2: Support Field */ +#define OSC_SB_PAD_SUPPORT 0x00000001 +#define OSC_SB_PPC_OST_SUPPORT 0x00000002 +#define OSC_SB_PR3_SUPPORT 0x00000004 +#define OSC_SB_HOTPLUG_OST_SUPPORT 0x00000008 +#define OSC_SB_APEI_SUPPORT 0x00000010 +#define OSC_SB_CPC_SUPPORT 0x00000020 extern bool osc_sb_apei_support_acked; -/* PCI defined _OSC bits */ -/* _OSC DW1 Definition (OS Support Fields) */ -#define OSC_EXT_PCI_CONFIG_SUPPORT 1 -#define OSC_ACTIVE_STATE_PWR_SUPPORT 2 -#define OSC_CLOCK_PWR_CAPABILITY_SUPPORT 4 -#define OSC_PCI_SEGMENT_GROUPS_SUPPORT 8 -#define OSC_MSI_SUPPORT 16 -#define OSC_PCI_SUPPORT_MASKS 0x1f - -/* _OSC DW1 Definition (OS Control Fields) */ -#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 1 -#define OSC_SHPC_NATIVE_HP_CONTROL 2 -#define OSC_PCI_EXPRESS_PME_CONTROL 4 -#define OSC_PCI_EXPRESS_AER_CONTROL 8 -#define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL 16 - -#define OSC_PCI_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ - OSC_SHPC_NATIVE_HP_CONTROL | \ - OSC_PCI_EXPRESS_PME_CONTROL | \ - OSC_PCI_EXPRESS_AER_CONTROL | \ - OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL) - -#define OSC_PCI_NATIVE_HOTPLUG (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ - OSC_SHPC_NATIVE_HP_CONTROL) +/* PCI Host Bridge _OSC: Capabilities DWORD 2: Support Field */ +#define OSC_PCI_EXT_CONFIG_SUPPORT 0x00000001 +#define OSC_PCI_ASPM_SUPPORT 0x00000002 +#define OSC_PCI_CLOCK_PM_SUPPORT 0x00000004 +#define OSC_PCI_SEGMENT_GROUPS_SUPPORT 0x00000008 +#define OSC_PCI_MSI_SUPPORT 0x00000010 +#define OSC_PCI_SUPPORT_MASKS 0x0000001f + +/* PCI Host Bridge _OSC: Capabilities DWORD 3: Control Field */ +#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 0x00000001 +#define OSC_PCI_SHPC_NATIVE_HP_CONTROL 0x00000002 +#define OSC_PCI_EXPRESS_PME_CONTROL 0x00000004 +#define OSC_PCI_EXPRESS_AER_CONTROL 0x00000008 +#define OSC_PCI_EXPRESS_CAPABILITY_CONTROL 0x00000010 +#define OSC_PCI_CONTROL_MASKS 0x0000001f extern acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req); diff --git a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h index b6bdcd66c07d..e00e9f362fd5 100644 --- a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h +++ b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h @@ -241,6 +241,12 @@ #define IMX6Q_GPR5_L2_CLK_STOP BIT(8) +#define IMX6Q_GPR8_TX_SWING_LOW (0x7f << 25) +#define IMX6Q_GPR8_TX_SWING_FULL (0x7f << 18) +#define IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB (0x3f << 12) +#define IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB (0x3f << 6) +#define IMX6Q_GPR8_TX_DEEMPH_GEN1 (0x3f << 0) + #define IMX6Q_GPR9_TZASC2_BYP BIT(1) #define IMX6Q_GPR9_TZASC1_BYP BIT(0) @@ -273,7 +279,9 @@ #define IMX6Q_GPR12_ARMP_AHB_CLK_EN BIT(26) #define IMX6Q_GPR12_ARMP_ATB_CLK_EN BIT(25) #define IMX6Q_GPR12_ARMP_APB_CLK_EN BIT(24) +#define IMX6Q_GPR12_DEVICE_TYPE (0xf << 12) #define IMX6Q_GPR12_PCIE_CTL_2 BIT(10) +#define IMX6Q_GPR12_LOS_LEVEL (0x1f << 4) #define IMX6Q_GPR13_SDMA_STOP_REQ BIT(30) #define IMX6Q_GPR13_CAN2_STOP_REQ BIT(29) diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index f0509148111d..0890556f779e 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -557,7 +557,8 @@ #define PCI_EXP_DEVCAP2_OBFF_MSG 0x00040000 /* New message signaling */ #define PCI_EXP_DEVCAP2_OBFF_WAKE 0x00080000 /* Re-use WAKE# for OBFF */ #define PCI_EXP_DEVCTL2 40 /* Device Control 2 */ -#define PCI_EXP_DEVCTL2_ARI 0x20 /* Alternative Routing-ID */ +#define PCI_EXP_DEVCTL2_COMP_TIMEOUT 0x000f /* Completion Timeout Value */ +#define PCI_EXP_DEVCTL2_ARI 0x0020 /* Alternative Routing-ID */ #define PCI_EXP_DEVCTL2_IDO_REQ_EN 0x0100 /* Allow IDO for requests */ #define PCI_EXP_DEVCTL2_IDO_CMP_EN 0x0200 /* Allow IDO for completions */ #define PCI_EXP_DEVCTL2_LTR_EN 0x0400 /* Enable LTR mechanism */ |