This patch tries to unify ARM32 and ARM64 PCIe in designware driver. Delete function dw_pcie_setup, dw_pcie_scan_bus, dw_pcie_map_irq and struct hw_pci, move related operations to dw_pcie_host_init. Also set pp->root_bus_nr = 0 in each PCIe host driver which is based on pcie-designware. This patch also try to use of_pci_get_host_bridge_resources for ARM32 and ARM64 according to the suggestion for Gabriele[1] This patch is based on Gabriele's patch about of_pci_range fix[2] I have compiled the driver with multi_v7_defconfig. However, I don't have ARM32 PCIe related board to do test. It will be appreciated if someone could help to test it. Signed-off-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx> [1] http://www.spinics.net/lists/linux-pci/msg42194.html [2] https://patchwork.ozlabs.org/patch/495018/ --- drivers/pci/host/pci-dra7xx.c | 1 + drivers/pci/host/pci-exynos.c | 2 +- drivers/pci/host/pci-imx6.c | 2 +- drivers/pci/host/pci-keystone-dw.c | 2 +- drivers/pci/host/pci-keystone.c | 2 +- drivers/pci/host/pci-layerscape.c | 2 +- drivers/pci/host/pcie-designware.c | 217 +++++++++++++------------------------ drivers/pci/host/pcie-designware.h | 10 +- drivers/pci/host/pcie-spear13xx.c | 2 +- 9 files changed, 86 insertions(+), 154 deletions(-) diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c index 80db09e..69364e8 100644 --- a/drivers/pci/host/pci-dra7xx.c +++ b/drivers/pci/host/pci-dra7xx.c @@ -275,6 +275,7 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx, pp = &dra7xx->pp; pp->dev = dev; + pp->root_bus_nr = 0; pp->ops = &dra7xx_pcie_host_ops; pp->irq = platform_get_irq(pdev, 1); diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c index f9f468d..9771bb0 100644 --- a/drivers/pci/host/pci-exynos.c +++ b/drivers/pci/host/pci-exynos.c @@ -530,7 +530,7 @@ static int __init exynos_add_pcie_port(struct pcie_port *pp, } } - pp->root_bus_nr = -1; + pp->root_bus_nr = 0; pp->ops = &exynos_pcie_host_ops; ret = dw_pcie_host_init(pp); diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 233a196..bec256c 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -551,7 +551,7 @@ static int __init imx6_add_pcie_port(struct pcie_port *pp, } } - pp->root_bus_nr = -1; + pp->root_bus_nr = 0; pp->ops = &imx6_pcie_host_ops; ret = dw_pcie_host_init(pp); diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c index f34892e..b1e4135 100644 --- a/drivers/pci/host/pci-keystone-dw.c +++ b/drivers/pci/host/pci-keystone-dw.c @@ -327,7 +327,7 @@ static void ks_dw_pcie_clear_dbi_mode(void __iomem *reg_virt) void ks_dw_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie) { struct pcie_port *pp = &ks_pcie->pp; - u32 start = pp->mem.start, end = pp->mem.end; + u32 start = pp->mem->start, end = pp->mem->end; int i, tr_size; /* Disable BARs for inbound access */ diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c index 734da58..8113832 100644 --- a/drivers/pci/host/pci-keystone.c +++ b/drivers/pci/host/pci-keystone.c @@ -309,7 +309,7 @@ static int __init ks_add_pcie_port(struct keystone_pcie *ks_pcie, return ret; } - pp->root_bus_nr = -1; + pp->root_bus_nr = 0; pp->ops = &keystone_pcie_host_ops; ret = ks_dw_pcie_host_init(ks_pcie, ks_pcie->msi_intc_np); if (ret) { diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c index b2328ea1..79ff08c 100644 --- a/drivers/pci/host/pci-layerscape.c +++ b/drivers/pci/host/pci-layerscape.c @@ -106,7 +106,7 @@ static int ls_add_pcie_port(struct ls_pcie *pcie) pp = &pcie->pp; pp->dev = pcie->dev; pp->dbi_base = pcie->dbi; - pp->root_bus_nr = -1; + pp->root_bus_nr = 0; pp->ops = &ls_pcie_host_ops; ret = dw_pcie_host_init(pp); diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index 69486be..6092c84 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -11,6 +11,7 @@ * published by the Free Software Foundation. */ +#include <linux/hardirq.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/kernel.h> @@ -69,16 +70,7 @@ #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16) #define PCIE_ATU_UPPER_TARGET 0x91C -static struct hw_pci dw_pci; - -static unsigned long global_io_offset; - -static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys) -{ - BUG_ON(!sys->private_data); - - return sys->private_data; -} +static struct pci_ops dw_pcie_ops; int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val) { @@ -255,7 +247,7 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq) static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos) { int irq, pos0, i; - struct pcie_port *pp = sys_to_pcie(desc->dev->bus->sysdata); + struct pcie_port *pp = desc->dev->bus->sysdata; pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS, order_base_2(no_irqs)); @@ -298,7 +290,7 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, { int irq, pos; struct msi_msg msg; - struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata); + struct pcie_port *pp = pdev->bus->sysdata; if (desc->msi_attrib.is_msix) return -EINVAL; @@ -327,7 +319,7 @@ static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) { struct irq_data *data = irq_get_irq_data(irq); struct msi_desc *msi = irq_data_get_msi(data); - struct pcie_port *pp = sys_to_pcie(msi->dev->bus->sysdata); + struct pcie_port *pp = msi->dev->bus->sysdata; clear_irq_range(pp, irq, 1, data->hwirq); } @@ -359,21 +351,19 @@ static const struct irq_domain_ops msi_domain_ops = { .map = dw_pcie_msi_map, }; -int dw_pcie_host_init(struct pcie_port *pp) +int __init dw_pcie_host_init(struct pcie_port *pp) { struct device_node *np = pp->dev->of_node; struct platform_device *pdev = to_platform_device(pp->dev); - struct of_pci_range range; - struct of_pci_range_parser parser; + struct pci_bus *bus; struct resource *cfg_res; - u32 val, na, ns; + LIST_HEAD(res); + u32 val, ns; const __be32 *addrp; int i, index, ret; + struct resource_entry *win; - /* Find the address cell size and the number of cells in order to get - * the untranslated address. - */ - of_property_read_u32(np, "#address-cells", &na); + /* Find the number of cells in order to get the untranslated address */ ns = of_n_size_cells(np); cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); @@ -392,78 +382,62 @@ int dw_pcie_host_init(struct pcie_port *pp) dev_err(pp->dev, "missing *config* reg space\n"); } - if (of_pci_range_parser_init(&parser, np)) { - dev_err(pp->dev, "missing ranges property\n"); - return -EINVAL; - } + ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base); + if (ret) + return ret; /* Get the I/O and memory ranges from DT */ - for_each_of_pci_range(&parser, &range) { - unsigned long restype = range.flags & IORESOURCE_TYPE_BITS; - - if (restype == IORESOURCE_IO) { - of_pci_range_to_resource(&range, np, &pp->io); - pp->io.name = "I/O"; - pp->io.start = max_t(resource_size_t, - PCIBIOS_MIN_IO, - range.pci_addr + global_io_offset); - pp->io.end = min_t(resource_size_t, - IO_SPACE_LIMIT, - range.pci_addr + range.size - + global_io_offset - 1); - pp->io_size = resource_size(&pp->io); - pp->io_bus_addr = range.pci_addr; - pp->io_base = range.cpu_addr; - - /* Find the untranslated IO space address */ - pp->io_mod_base = of_read_number(parser.range - - parser.np + na, ns); - } - if (restype == IORESOURCE_MEM) { - of_pci_range_to_resource(&range, np, &pp->mem); - pp->mem.name = "MEM"; - pp->mem_size = resource_size(&pp->mem); - pp->mem_bus_addr = range.pci_addr; - - /* Find the untranslated MEM space address */ - pp->mem_mod_base = of_read_number(parser.range - - parser.np + na, ns); - } - if (restype == 0) { - of_pci_range_to_resource(&range, np, &pp->cfg); - pp->cfg0_size = resource_size(&pp->cfg)/2; - pp->cfg1_size = resource_size(&pp->cfg)/2; - pp->cfg0_base = pp->cfg.start; - pp->cfg1_base = pp->cfg.start + pp->cfg0_size; + resource_list_for_each_entry(win, &res) { + switch (resource_type(win->res)) { + case IORESOURCE_IO: + pp->io = win->res; + pp->io->name = "I/O"; + pp->io_size = resource_size(pp->io); + pp->io_bus_addr = pp->io->start - win->offset; + pp->io_mod_base = win->__res.start; + ret = pci_remap_iospace(pp->io, pp->io_base); + if (ret) { + dev_warn(pp->dev, "error %d: failed to map resource %pR\n", + ret, pp->io); + continue; + } + break; + case IORESOURCE_MEM: + pp->mem = win->res; + pp->mem->name = "MEM"; + pp->mem_size = resource_size(pp->mem); + pp->mem_bus_addr = pp->mem->start - win->offset; + pp->mem_mod_base = win->__res.start; + break; + case 0: + pp->cfg = win->res; + pp->cfg0_size = resource_size(pp->cfg)/2; + pp->cfg1_size = resource_size(pp->cfg)/2; + pp->cfg0_base = pp->cfg->start; + pp->cfg1_base = pp->cfg->start + pp->cfg0_size; /* Find the untranslated configuration space address */ - pp->cfg0_mod_base = of_read_number(parser.range - - parser.np + na, ns); - pp->cfg1_mod_base = pp->cfg0_mod_base + - pp->cfg0_size; + pp->cfg0_mod_base = win->__res.start; + pp->cfg1_mod_base = pp->cfg0_mod_base + pp->cfg0_size; + break; + case IORESOURCE_BUS: + pp->busn = win->res; + break; + default: + continue; } } - ret = of_pci_parse_bus_range(np, &pp->busn); - if (ret < 0) { - pp->busn.name = np->name; - pp->busn.start = 0; - pp->busn.end = 0xff; - pp->busn.flags = IORESOURCE_BUS; - dev_dbg(pp->dev, "failed to parse bus-range property: %d, using default %pR\n", - ret, &pp->busn); - } - if (!pp->dbi_base) { - pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start, - resource_size(&pp->cfg)); + pp->dbi_base = devm_ioremap(pp->dev, pp->cfg->start, + resource_size(pp->cfg)); if (!pp->dbi_base) { dev_err(pp->dev, "error with ioremap\n"); return -ENOMEM; } } - pp->mem_base = pp->mem.start; + pp->mem_base = pp->mem->start; if (!pp->va_cfg0_base) { pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base, @@ -524,15 +498,28 @@ int dw_pcie_host_init(struct pcie_port *pp) val |= PORT_LOGIC_SPEED_CHANGE; dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val); -#ifdef CONFIG_PCI_MSI - dw_pcie_msi_chip.dev = pp->dev; - dw_pci.msi_ctrl = &dw_pcie_msi_chip; + bus = pci_create_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops, + pp, &res); + if (!bus) + return -ENOMEM; + +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN + bus->msi = container_of(&pp->irq_domain, struct msi_controller, domain); +#else + bus->msi = &dw_pcie_msi_chip; #endif - dw_pci.nr_controllers = 1; - dw_pci.private_data = (void **)&pp; + pci_scan_child_bus(bus); + if (pp->ops->scan_bus) + pp->ops->scan_bus(pp); - pci_common_init_dev(pp->dev, &dw_pci); +#ifdef CONFIG_ARM + /* support old dtbs that incorrectly describe IRQs */ + pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci); +#endif + + pci_assign_unassigned_bus_resources(bus); + pci_bus_add_devices(bus); return 0; } @@ -633,7 +620,7 @@ static int dw_pcie_valid_config(struct pcie_port *pp, static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where, int size, u32 *val) { - struct pcie_port *pp = sys_to_pcie(bus->sysdata); + struct pcie_port *pp = bus->sysdata; int ret; if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) { @@ -657,7 +644,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where, static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn, int where, int size, u32 val) { - struct pcie_port *pp = sys_to_pcie(bus->sysdata); + struct pcie_port *pp = bus->sysdata; int ret; if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) @@ -681,62 +668,6 @@ static struct pci_ops dw_pcie_ops = { .write = dw_pcie_wr_conf, }; -static int dw_pcie_setup(int nr, struct pci_sys_data *sys) -{ - struct pcie_port *pp; - - pp = sys_to_pcie(sys); - - if (global_io_offset < SZ_1M && pp->io_size > 0) { - sys->io_offset = global_io_offset - pp->io_bus_addr; - pci_ioremap_io(global_io_offset, pp->io_base); - global_io_offset += SZ_64K; - pci_add_resource_offset(&sys->resources, &pp->io, - sys->io_offset); - } - - sys->mem_offset = pp->mem.start - pp->mem_bus_addr; - pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset); - pci_add_resource(&sys->resources, &pp->busn); - - return 1; -} - -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); - - pp->root_bus_nr = sys->busnr; - bus = pci_scan_root_bus(pp->dev, sys->busnr, - &dw_pcie_ops, sys, &sys->resources); - if (!bus) - return NULL; - - if (bus && pp->ops->scan_bus) - pp->ops->scan_bus(pp); - - return bus; -} - -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); - int irq; - - irq = of_irq_parse_and_map_pci(dev, slot, pin); - if (!irq) - irq = pp->irq; - - return irq; -} - -static struct hw_pci dw_pci = { - .setup = dw_pcie_setup, - .scan = dw_pcie_scan_bus, - .map_irq = dw_pcie_map_irq, -}; - void dw_pcie_setup_rc(struct pcie_port *pp) { u32 val; diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h index d0bbd27..efac57d 100644 --- a/drivers/pci/host/pcie-designware.h +++ b/drivers/pci/host/pcie-designware.h @@ -34,7 +34,7 @@ struct pcie_port { u64 cfg1_mod_base; void __iomem *va_cfg1_base; u32 cfg1_size; - u64 io_base; + resource_size_t io_base; u64 io_mod_base; phys_addr_t io_bus_addr; u32 io_size; @@ -42,10 +42,10 @@ struct pcie_port { u64 mem_mod_base; phys_addr_t mem_bus_addr; u32 mem_size; - struct resource cfg; - struct resource io; - struct resource mem; - struct resource busn; + struct resource *cfg; + struct resource *io; + struct resource *mem; + struct resource *busn; int irq; u32 lanes; struct pcie_host_ops *ops; diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c index c49fbdc..03eb204 100644 --- a/drivers/pci/host/pcie-spear13xx.c +++ b/drivers/pci/host/pcie-spear13xx.c @@ -286,7 +286,7 @@ static int spear13xx_add_pcie_port(struct pcie_port *pp, return ret; } - pp->root_bus_nr = -1; + pp->root_bus_nr = 0; pp->ops = &spear13xx_pcie_host_ops; ret = dw_pcie_host_init(pp); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
