From: Gabriele Paoloni Date: Thu, 8 Oct 2015 19:27:48 +0000 (-0500) Subject: PCI: designware: Simplify dw_pcie_cfg_read/write() interfaces X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4c45852f494dab827291c656ee9e12f3f4ee64d6;p=linux-beck.git PCI: designware: Simplify dw_pcie_cfg_read/write() interfaces Callers of dw_pcie_cfg_read() and dw_pcie_cfg_write() previously had to split the address into "addr" and "where". The callees assumed "addr" was 32-bit aligned (with zeros in the low two bits) and they used only the low two bits of "where". Accept the entire address in "addr" and drop the now-redundant "where" argument. As an example, this replaces this: int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val) *val = readb(addr + (where & 1)); with this: int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val) *val = readb(addr): [bhelgaas: changelog, split access size change to separate patch] Signed-off-by: Gabriele Paoloni Signed-off-by: Bjorn Helgaas --- diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c index f9f468d9a819..01095e1160a4 100644 --- a/drivers/pci/host/pci-exynos.c +++ b/drivers/pci/host/pci-exynos.c @@ -454,7 +454,7 @@ static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, int ret; exynos_pcie_sideband_dbi_r_mode(pp, true); - ret = dw_pcie_cfg_read(pp->dbi_base + (where & ~0x3), where, size, val); + ret = dw_pcie_cfg_read(pp->dbi_base + where, size, val); exynos_pcie_sideband_dbi_r_mode(pp, false); return ret; } @@ -465,8 +465,7 @@ static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, int ret; exynos_pcie_sideband_dbi_w_mode(pp, true); - ret = dw_pcie_cfg_write(pp->dbi_base + (where & ~0x3), - where, size, val); + ret = dw_pcie_cfg_write(pp->dbi_base + where, size, val); exynos_pcie_sideband_dbi_w_mode(pp, false); return ret; } diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c index 3cf55cdb7f87..0146b4121d49 100644 --- a/drivers/pci/host/pci-keystone-dw.c +++ b/drivers/pci/host/pci-keystone-dw.c @@ -398,7 +398,7 @@ int ks_dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, addr = ks_pcie_cfg_setup(ks_pcie, bus_num, devfn); - return dw_pcie_cfg_read(addr + (where & ~0x3), where, size, val); + return dw_pcie_cfg_read(addr + where, size, val); } int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, @@ -410,7 +410,7 @@ int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, addr = ks_pcie_cfg_setup(ks_pcie, bus_num, devfn); - return dw_pcie_cfg_write(addr + (where & ~0x3), where, size, val); + return dw_pcie_cfg_write(addr + where, size, val); } /** diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index 451f01e145c2..759cd0a50910 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -80,14 +80,14 @@ static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys) return sys->private_data; } -int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val) +int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val) { if (size == 4) *val = readl(addr); else if (size == 2) - *val = readw(addr + (where & 2)); + *val = readw(addr); else if (size == 1) - *val = readb(addr + (where & 1)); + *val = readb(addr); else { *val = 0; return PCIBIOS_BAD_REGISTER_NUMBER; @@ -96,14 +96,14 @@ int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val) return PCIBIOS_SUCCESSFUL; } -int dw_pcie_cfg_write(void __iomem *addr, int where, int size, u32 val) +int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val) { if (size == 4) writel(val, addr); else if (size == 2) - writew(val, addr + (where & 2)); + writew(val, addr); else if (size == 1) - writeb(val, addr + (where & 3)); + writeb(val, addr); else return PCIBIOS_BAD_REGISTER_NUMBER; @@ -134,8 +134,7 @@ static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, if (pp->ops->rd_own_conf) ret = pp->ops->rd_own_conf(pp, where, size, val); else - ret = dw_pcie_cfg_read(pp->dbi_base + (where & ~0x3), where, - size, val); + ret = dw_pcie_cfg_read(pp->dbi_base + where, size, val); return ret; } @@ -148,8 +147,7 @@ static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, if (pp->ops->wr_own_conf) ret = pp->ops->wr_own_conf(pp, where, size, val); else - ret = dw_pcie_cfg_write(pp->dbi_base + (where & ~0x3), where, - size, val); + ret = dw_pcie_cfg_write(pp->dbi_base + where, size, val); return ret; } @@ -585,13 +583,12 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, u32 devfn, int where, int size, u32 *val) { int ret, type; - u32 address, busdev, cfg_size; + u32 busdev, cfg_size; u64 cpu_addr; void __iomem *va_cfg_base; busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) | PCIE_ATU_FUNC(PCI_FUNC(devfn)); - address = where & ~0x3; if (bus->parent->number == pp->root_bus_nr) { type = PCIE_ATU_TYPE_CFG0; @@ -608,7 +605,7 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0, type, cpu_addr, busdev, cfg_size); - ret = dw_pcie_cfg_read(va_cfg_base + address, where, size, val); + ret = dw_pcie_cfg_read(va_cfg_base + where, size, val); dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0, PCIE_ATU_TYPE_IO, pp->io_mod_base, pp->io_bus_addr, pp->io_size); @@ -620,13 +617,12 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, u32 devfn, int where, int size, u32 val) { int ret, type; - u32 address, busdev, cfg_size; + u32 busdev, cfg_size; u64 cpu_addr; void __iomem *va_cfg_base; busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) | PCIE_ATU_FUNC(PCI_FUNC(devfn)); - address = where & ~0x3; if (bus->parent->number == pp->root_bus_nr) { type = PCIE_ATU_TYPE_CFG0; @@ -643,7 +639,7 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus, dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0, type, cpu_addr, busdev, cfg_size); - ret = dw_pcie_cfg_write(va_cfg_base + address, where, size, val); + ret = dw_pcie_cfg_write(va_cfg_base + where, size, val); dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0, PCIE_ATU_TYPE_IO, pp->io_mod_base, pp->io_bus_addr, pp->io_size); diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h index 35123d9362c5..e7b3279c3ff0 100644 --- a/drivers/pci/host/pcie-designware.h +++ b/drivers/pci/host/pcie-designware.h @@ -76,8 +76,8 @@ struct pcie_host_ops { int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip); }; -int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val); -int dw_pcie_cfg_write(void __iomem *addr, int where, int size, u32 val); +int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val); +int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val); irqreturn_t 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); diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c index 0754ea3ef7ea..b95b7563c052 100644 --- a/drivers/pci/host/pcie-spear13xx.c +++ b/drivers/pci/host/pcie-spear13xx.c @@ -163,14 +163,12 @@ static int spear13xx_pcie_establish_link(struct pcie_port *pp) * default value in capability register is 512 bytes. So force * it to 128 here. */ - dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, - 0, 2, &val); + dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, &val); val &= ~PCI_EXP_DEVCTL_READRQ; - dw_pcie_cfg_write(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, - 0, 2, val); + dw_pcie_cfg_write(pp->dbi_base + exp_cap_off + PCI_EXP_DEVCTL, 2, val); - dw_pcie_cfg_write(pp->dbi_base + PCI_VENDOR_ID, 0, 2, 0x104A); - dw_pcie_cfg_write(pp->dbi_base + PCI_VENDOR_ID, 2, 2, 0xCD80); + dw_pcie_cfg_write(pp->dbi_base + PCI_VENDOR_ID, 2, 0x104A); + dw_pcie_cfg_write(pp->dbi_base + PCI_DEVICE_ID, 2, 0xCD80); /* * if is_gen1 is set then handle it, so that some buggy card @@ -178,21 +176,21 @@ static int spear13xx_pcie_establish_link(struct pcie_port *pp) */ if (spear13xx_pcie->is_gen1) { dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCAP, - 0, 4, &val); + 4, &val); if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) { val &= ~((u32)PCI_EXP_LNKCAP_SLS); val |= PCI_EXP_LNKCAP_SLS_2_5GB; dw_pcie_cfg_write(pp->dbi_base + exp_cap_off + - PCI_EXP_LNKCAP, 0, 4, val); + PCI_EXP_LNKCAP, 4, val); } dw_pcie_cfg_read(pp->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2, - 0, 2, &val); + 2, &val); if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) { val &= ~((u32)PCI_EXP_LNKCAP_SLS); val |= PCI_EXP_LNKCAP_SLS_2_5GB; dw_pcie_cfg_write(pp->dbi_base + exp_cap_off + - PCI_EXP_LNKCTL2, 0, 2, val); + PCI_EXP_LNKCTL2, 2, val); } }