diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/access.c | 2 | ||||
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 13 | ||||
| -rw-r--r-- | drivers/pci/host/pci-tegra.c | 28 | ||||
| -rw-r--r-- | drivers/pci/host/pci-xgene.c | 7 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 7 | ||||
| -rw-r--r-- | drivers/pci/msi.c | 26 | ||||
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 8 | ||||
| -rw-r--r-- | drivers/pci/pci.h | 2 | ||||
| -rw-r--r-- | drivers/pci/pcie/pme.c | 6 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 30 |
10 files changed, 90 insertions, 39 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index d292d7c..49dd766 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -444,7 +444,7 @@ static inline int pcie_cap_version(const struct pci_dev *dev) return pcie_caps_reg(dev) & PCI_EXP_FLAGS_VERS; } -static inline bool pcie_cap_has_lnkctl(const struct pci_dev *dev) +bool pcie_cap_has_lnkctl(const struct pci_dev *dev) { int type = pci_pcie_type(dev); diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 233fe8a..69202d1 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -275,15 +275,22 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) goto err_pcie; } - /* allow the clocks to stabilize */ - usleep_range(200, 500); - /* power up core phy and enable ref clock */ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_TEST_PD, 0 << 18); + /* + * the async reset input need ref clock to sync internally, + * when the ref clock comes after reset, internal synced + * reset time is too short, cannot meet the requirement. + * add one ~10us delay here. + */ + udelay(10); regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16); + /* allow the clocks to stabilize */ + usleep_range(200, 500); + /* Some boards don't have PCIe reset GPIO. */ if (gpio_is_valid(imx6_pcie->reset_gpio)) { gpio_set_value(imx6_pcie->reset_gpio, 0); diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index adee80b..feccfa6 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -276,6 +276,7 @@ struct tegra_pcie { struct resource all; struct resource io; + struct resource pio; struct resource mem; struct resource prefetch; struct resource busn; @@ -658,7 +659,6 @@ static int tegra_pcie_setup(int nr, struct pci_sys_data *sys) { struct tegra_pcie *pcie = sys_to_pcie(sys); int err; - phys_addr_t io_start; err = devm_request_resource(pcie->dev, &pcie->all, &pcie->mem); if (err < 0) @@ -668,14 +668,12 @@ static int tegra_pcie_setup(int nr, struct pci_sys_data *sys) if (err) return err; - io_start = pci_pio_to_address(pcie->io.start); - pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset); pci_add_resource_offset(&sys->resources, &pcie->prefetch, sys->mem_offset); pci_add_resource(&sys->resources, &pcie->busn); - pci_ioremap_io(nr * SZ_64K, io_start); + pci_ioremap_io(pcie->pio.start, pcie->io.start); return 1; } @@ -777,7 +775,6 @@ static irqreturn_t tegra_pcie_isr(int irq, void *arg) static void tegra_pcie_setup_translations(struct tegra_pcie *pcie) { u32 fpci_bar, size, axi_address; - phys_addr_t io_start = pci_pio_to_address(pcie->io.start); /* Bar 0: type 1 extended configuration space */ fpci_bar = 0xfe100000; @@ -790,7 +787,7 @@ static void tegra_pcie_setup_translations(struct tegra_pcie *pcie) /* Bar 1: downstream IO bar */ fpci_bar = 0xfdfc0000; size = resource_size(&pcie->io); - axi_address = io_start; + axi_address = pcie->io.start; afi_writel(pcie, axi_address, AFI_AXI_BAR1_START); afi_writel(pcie, size >> 12, AFI_AXI_BAR1_SZ); afi_writel(pcie, fpci_bar, AFI_FPCI_BAR1); @@ -1682,8 +1679,23 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie) switch (res.flags & IORESOURCE_TYPE_BITS) { case IORESOURCE_IO: - memcpy(&pcie->io, &res, sizeof(res)); - pcie->io.name = np->full_name; + memcpy(&pcie->pio, &res, sizeof(res)); + pcie->pio.name = np->full_name; + + /* + * The Tegra PCIe host bridge uses this to program the + * mapping of the I/O space to the physical address, + * so we override the .start and .end fields here that + * of_pci_range_to_resource() converted to I/O space. + * We also set the IORESOURCE_MEM type to clarify that + * the resource is in the physical memory space. + */ + pcie->io.start = range.cpu_addr; + pcie->io.end = range.cpu_addr + range.size - 1; + pcie->io.flags = IORESOURCE_MEM; + pcie->io.name = "I/O"; + + memcpy(&res, &pcie->io, sizeof(res)); break; case IORESOURCE_MEM: diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c index 9ecabfa..2988fe1 100644 --- a/drivers/pci/host/pci-xgene.c +++ b/drivers/pci/host/pci-xgene.c @@ -631,10 +631,15 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev) if (ret) return ret; - bus = pci_scan_root_bus(&pdev->dev, 0, &xgene_pcie_ops, port, &res); + bus = pci_create_root_bus(&pdev->dev, 0, + &xgene_pcie_ops, port, &res); if (!bus) return -ENOMEM; + pci_scan_child_bus(bus); + pci_assign_unassigned_bus_resources(bus); + pci_bus_add_devices(bus); + platform_set_drvdata(pdev, port); return 0; } diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index 3a5e7e2..07aa722 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -262,13 +262,6 @@ static int pciehp_probe(struct pcie_device *dev) goto err_out_none; } - if (!dev->port->subordinate) { - /* Can happen if we run out of bus numbers during probe */ - dev_err(&dev->device, - "Hotplug bridge without secondary bus, ignoring\n"); - goto err_out_none; - } - ctrl = pcie_init(dev); if (!ctrl) { dev_err(&dev->device, "Controller initialization failed\n"); diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 476f4b1..fd60806 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -616,6 +616,20 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec) return entry; } +static int msi_verify_entries(struct pci_dev *dev) +{ + struct msi_desc *entry; + + list_for_each_entry(entry, &dev->msi_list, list) { + if (!dev->no_64bit_msi || !entry->msg.address_hi) + continue; + dev_err(&dev->dev, "Device has broken 64-bit MSI but arch" + " tried to assign one above 4G\n"); + return -EIO; + } + return 0; +} + /** * msi_capability_init - configure device's MSI capability structure * @dev: pointer to the pci_dev data structure of MSI device function @@ -653,6 +667,13 @@ static int msi_capability_init(struct pci_dev *dev, int nvec) return ret; } + ret = msi_verify_entries(dev); + if (ret) { + msi_mask_irq(entry, mask, ~mask); + free_msi_irqs(dev); + return ret; + } + ret = populate_msi_sysfs(dev); if (ret) { msi_mask_irq(entry, mask, ~mask); @@ -765,6 +786,11 @@ static int msix_capability_init(struct pci_dev *dev, if (ret) goto out_avail; + /* Check if all MSI entries honor device restrictions */ + ret = msi_verify_entries(dev); + if (ret) + goto out_free; + /* * Some devices require MSI-X to be enabled before we can touch the * MSI-X registers. We need to mask all the vectors to prevent diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 92b6d9a..2c6643f 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -185,7 +185,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(modalias); -static ssize_t enabled_store(struct device *dev, struct device_attribute *attr, +static ssize_t enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct pci_dev *pdev = to_pci_dev(dev); @@ -210,7 +210,7 @@ static ssize_t enabled_store(struct device *dev, struct device_attribute *attr, return result < 0 ? result : count; } -static ssize_t enabled_show(struct device *dev, struct device_attribute *attr, +static ssize_t enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pci_dev *pdev; @@ -218,7 +218,7 @@ static ssize_t enabled_show(struct device *dev, struct device_attribute *attr, pdev = to_pci_dev(dev); return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt)); } -static DEVICE_ATTR_RW(enabled); +static DEVICE_ATTR_RW(enable); #ifdef CONFIG_NUMA static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr, @@ -563,7 +563,7 @@ static struct attribute *pci_dev_attrs[] = { #endif &dev_attr_dma_mask_bits.attr, &dev_attr_consistent_dma_mask_bits.attr, - &dev_attr_enabled.attr, + &dev_attr_enable.attr, &dev_attr_broken_parity_status.attr, &dev_attr_msi_bus.attr, #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 0601890..4a3902d 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -6,6 +6,8 @@ extern const unsigned char pcie_link_speed[]; +bool pcie_cap_has_lnkctl(const struct pci_dev *dev); + /* Functions internal to the PCI core code */ int pci_create_sysfs_dev_files(struct pci_dev *pdev); diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c index a9f9c46..63fc639 100644 --- a/drivers/pci/pcie/pme.c +++ b/drivers/pci/pcie/pme.c @@ -397,6 +397,7 @@ static int pcie_pme_suspend(struct pcie_device *srv) struct pcie_pme_service_data *data = get_service_data(srv); struct pci_dev *port = srv->port; bool wakeup; + int ret; if (device_may_wakeup(&port->dev)) { wakeup = true; @@ -407,9 +408,10 @@ static int pcie_pme_suspend(struct pcie_device *srv) } spin_lock_irq(&data->lock); if (wakeup) { - enable_irq_wake(srv->irq); + ret = enable_irq_wake(srv->irq); data->suspend_level = PME_SUSPEND_WAKEUP; - } else { + } + if (!wakeup || ret) { struct pci_dev *port = srv->port; pcie_pme_interrupt_enable(port, false); diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 5ed9930..c8ca98c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -407,15 +407,16 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child) { struct pci_dev *dev = child->self; u16 mem_base_lo, mem_limit_lo; - unsigned long base, limit; + u64 base64, limit64; + dma_addr_t base, limit; struct pci_bus_region region; struct resource *res; res = child->resource[2]; pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo); pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo); - base = ((unsigned long) mem_base_lo & PCI_PREF_RANGE_MASK) << 16; - limit = ((unsigned long) mem_limit_lo & PCI_PREF_RANGE_MASK) << 16; + base64 = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16; + limit64 = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16; if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { u32 mem_base_hi, mem_limit_hi; @@ -429,17 +430,20 @@ static void pci_read_bridge_mmio_pref(struct pci_bus *child) * this, just assume they are not being used. */ if (mem_base_hi <= mem_limit_hi) { -#if BITS_PER_LONG == 64 - base |= ((unsigned long) mem_base_hi) << 32; - limit |= ((unsigned long) mem_limit_hi) << 32; -#else - if (mem_base_hi || mem_limit_hi) { - dev_err(&dev->dev, "can't handle 64-bit address space for bridge\n"); - return; - } -#endif + base64 |= (u64) mem_base_hi << 32; + limit64 |= (u64) mem_limit_hi << 32; } } + + base = (dma_addr_t) base64; + limit = (dma_addr_t) limit64; + + if (base != base64) { + dev_err(&dev->dev, "can't handle bridge window above 4GB (bus address %#010llx)\n", + (unsigned long long) base64); + return; + } + if (base <= limit) { res->flags = (mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH; @@ -1323,7 +1327,7 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp) ~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or); /* Initialize Link Control Register */ - if (dev->subordinate) + if (pcie_cap_has_lnkctl(dev)) pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL, ~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or); |
