[+cc jingoohan1@xxxxxxxxx] On 2015/8/6 16:09, Zhou Wang wrote: > 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. > > In past, we use: > pci_common_init_dev > -> pcibios_init_hw > -> hw->scan (dw_pcie_scan_bus) > to pass 0 to root_bus_nr in struct pcie_port. This patch 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] > > Finally this patch reverts commit f4c55c5a3f7f "PCI: designware: Program ATU > with untranslated address" based on 1/6 in this series. we delete *_mod_base in > pcie-designware. This was discussed in [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: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> > > [1] http://www.spinics.net/lists/linux-pci/msg42194.html > [2] http://www.spinics.net/lists/arm-kernel/msg436779.html > --- > drivers/pci/host/pci-dra7xx.c | 15 +-- > 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 | 229 ++++++++++++------------------------- > drivers/pci/host/pcie-designware.h | 14 +-- > drivers/pci/host/pcie-spear13xx.c | 2 +- > 9 files changed, 95 insertions(+), 175 deletions(-) > > diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c > index 18ae7ff..1268c69 100644 > --- a/drivers/pci/host/pci-dra7xx.c > +++ b/drivers/pci/host/pci-dra7xx.c > @@ -141,15 +141,15 @@ static void dra7xx_pcie_host_init(struct pcie_port *pp) > { > dw_pcie_setup_rc(pp); > > - if (pp->io_mod_base) > - pp->io_mod_base &= CPU_TO_BUS_ADDR; > + if (pp->io_base) > + pp->io_base &= CPU_TO_BUS_ADDR; > > - if (pp->mem_mod_base) > - pp->mem_mod_base &= CPU_TO_BUS_ADDR; > + if (pp->mem_base) > + pp->mem_base &= CPU_TO_BUS_ADDR; > > - if (pp->cfg0_mod_base) { > - pp->cfg0_mod_base &= CPU_TO_BUS_ADDR; > - pp->cfg1_mod_base &= CPU_TO_BUS_ADDR; > + if (pp->cfg0_base) { > + pp->cfg0_base &= CPU_TO_BUS_ADDR; > + pp->cfg1_base &= CPU_TO_BUS_ADDR; > } > > dra7xx_pcie_establish_link(pp); > @@ -288,6 +288,7 @@ 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 c5d407c..e71a88e 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); > } > @@ -363,14 +355,12 @@ int 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, ns; > - const __be32 *addrp; > - int i, index, ret; > - > - ns = of_n_size_cells(np); > + LIST_HEAD(res); > + u32 val; > + int i, ret; > + struct resource_entry *win; > > cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); > if (cfg_res) { > @@ -378,85 +368,60 @@ int dw_pcie_host_init(struct pcie_port *pp) > pp->cfg1_size = resource_size(cfg_res)/2; > pp->cfg0_base = cfg_res->start; > pp->cfg1_base = cfg_res->start + pp->cfg0_size; > - > - /* Find the untranslated configuration space address */ > - index = of_property_match_string(np, "reg-names", "config"); > - addrp = of_get_address(np, index, NULL, NULL); > - pp->cfg0_mod_base = of_read_number(addrp, ns); > - pp->cfg1_mod_base = pp->cfg0_mod_base + pp->cfg0_size; > } else { > 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 = range.cpu_addr; > - } > - 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 = range.cpu_addr; > - } > - 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; > - > - /* Find the untranslated configuration space address */ > - pp->cfg0_mod_base = range.cpu_addr; > - pp->cfg1_mod_base = pp->cfg0_mod_base + > - 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; > + 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; > + 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; > + 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, > @@ -505,7 +470,7 @@ int dw_pcie_host_init(struct pcie_port *pp) > > if (!pp->ops->rd_other_conf) > dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1, > - PCIE_ATU_TYPE_MEM, pp->mem_mod_base, > + PCIE_ATU_TYPE_MEM, pp->mem_base, > pp->mem_bus_addr, pp->mem_size); > > dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0); > @@ -517,15 +482,29 @@ 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 > + 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 > dw_pcie_msi_chip.dev = pp->dev; > - dw_pci.msi_ctrl = &dw_pcie_msi_chip; > + 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); > + > +#ifdef CONFIG_ARM > + /* support old dtbs that incorrectly describe IRQs */ > + pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci); > +#endif > > - pci_common_init_dev(pp->dev, &dw_pci); > + pci_assign_unassigned_bus_resources(bus); > + pci_bus_add_devices(bus); > > return 0; > } > @@ -544,12 +523,12 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, > > if (bus->parent->number == pp->root_bus_nr) { > type = PCIE_ATU_TYPE_CFG0; > - cpu_addr = pp->cfg0_mod_base; > + cpu_addr = pp->cfg0_base; > cfg_size = pp->cfg0_size; > va_cfg_base = pp->va_cfg0_base; > } else { > type = PCIE_ATU_TYPE_CFG1; > - cpu_addr = pp->cfg1_mod_base; > + cpu_addr = pp->cfg1_base; > cfg_size = pp->cfg1_size; > va_cfg_base = pp->va_cfg1_base; > } > @@ -559,7 +538,7 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, > busdev, cfg_size); > ret = dw_pcie_cfg_read(va_cfg_base + address, where, size, val); > dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0, > - PCIE_ATU_TYPE_IO, pp->io_mod_base, > + PCIE_ATU_TYPE_IO, pp->io_base, > pp->io_bus_addr, pp->io_size); > > return ret; > @@ -579,12 +558,12 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, > > if (bus->parent->number == pp->root_bus_nr) { > type = PCIE_ATU_TYPE_CFG0; > - cpu_addr = pp->cfg0_mod_base; > + cpu_addr = pp->cfg0_base; > cfg_size = pp->cfg0_size; > va_cfg_base = pp->va_cfg0_base; > } else { > type = PCIE_ATU_TYPE_CFG1; > - cpu_addr = pp->cfg1_mod_base; > + cpu_addr = pp->cfg1_base; > cfg_size = pp->cfg1_size; > va_cfg_base = pp->va_cfg1_base; > } > @@ -594,7 +573,7 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, > busdev, cfg_size); > ret = dw_pcie_cfg_write(va_cfg_base + address, where, size, val); > dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0, > - PCIE_ATU_TYPE_IO, pp->io_mod_base, > + PCIE_ATU_TYPE_IO, pp->io_base, > pp->io_bus_addr, pp->io_size); > > return ret; > @@ -626,7 +605,7 @@ 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) { > @@ -650,7 +629,7 @@ 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) > @@ -674,62 +653,6 @@ 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..264c969 100644 > --- a/drivers/pci/host/pcie-designware.h > +++ b/drivers/pci/host/pcie-designware.h > @@ -27,25 +27,21 @@ struct pcie_port { > u8 root_bus_nr; > void __iomem *dbi_base; > u64 cfg0_base; > - u64 cfg0_mod_base; > void __iomem *va_cfg0_base; > u32 cfg0_size; > u64 cfg1_base; > - u64 cfg1_mod_base; > void __iomem *va_cfg1_base; > u32 cfg1_size; > - u64 io_base; > - u64 io_mod_base; > + resource_size_t io_base; > phys_addr_t io_bus_addr; > u32 io_size; > u64 mem_base; > - 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); 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