diff options
Diffstat (limited to 'drivers/pci/controller/pci-thunder-pem.c')
| -rw-r--r-- | drivers/pci/controller/pci-thunder-pem.c | 52 |
1 files changed, 30 insertions, 22 deletions
diff --git a/drivers/pci/controller/pci-thunder-pem.c b/drivers/pci/controller/pci-thunder-pem.c index f127ce8bd4ef..5fa037fb61dc 100644 --- a/drivers/pci/controller/pci-thunder-pem.c +++ b/drivers/pci/controller/pci-thunder-pem.c @@ -6,18 +6,30 @@ #include <linux/bitfield.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/pci.h> #include <linux/of_address.h> #include <linux/of_pci.h> #include <linux/pci-acpi.h> #include <linux/pci-ecam.h> #include <linux/platform_device.h> +#include <linux/io-64-nonatomic-lo-hi.h> #include "../pci.h" +#include "pci-host-common.h" #if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)) #define PEM_CFG_WR 0x28 #define PEM_CFG_RD 0x30 +/* + * Enhanced Configuration Access Mechanism (ECAM) + * + * N.B. This is a non-standard platform-specific ECAM bus shift value. For + * standard values defined in the PCI Express Base Specification see + * include/linux/pci-ecam.h. + */ +#define THUNDER_PCIE_ECAM_BUS_SHIFT 24 + struct thunder_pem_pci { u32 ea_entry[3]; void __iomem *pem_reg_base; @@ -30,10 +42,8 @@ static int thunder_pem_bridge_read(struct pci_bus *bus, unsigned int devfn, struct pci_config_window *cfg = bus->sysdata; struct thunder_pem_pci *pem_pci = (struct thunder_pem_pci *)cfg->priv; - if (devfn != 0 || where >= 2048) { - *val = ~0; + if (devfn != 0 || where >= 2048) return PCIBIOS_DEVICE_NOT_FOUND; - } /* * 32-bit accesses only. Write the address to the low order @@ -314,9 +324,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg, * structure here for the BAR. */ bar4_start = res_pem->start + 0xf00000; - pem_pci->ea_entry[0] = (u32)bar4_start | 2; - pem_pci->ea_entry[1] = (u32)(res_pem->end - bar4_start) & ~3u; - pem_pci->ea_entry[2] = (u32)(bar4_start >> 32); + pem_pci->ea_entry[0] = lower_32_bits(bar4_start) | 2; + pem_pci->ea_entry[1] = lower_32_bits(res_pem->end - bar4_start) & ~3u; + pem_pci->ea_entry[2] = upper_32_bits(bar4_start); cfg->priv = pem_pci; return 0; @@ -324,9 +334,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg, #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) -#define PEM_RES_BASE 0x87e0c0000000UL -#define PEM_NODE_MASK GENMASK(45, 44) -#define PEM_INDX_MASK GENMASK(26, 24) +#define PEM_RES_BASE 0x87e0c0000000ULL +#define PEM_NODE_MASK GENMASK_ULL(45, 44) +#define PEM_INDX_MASK GENMASK_ULL(26, 24) #define PEM_MIN_DOM_IN_NODE 4 #define PEM_MAX_DOM_IN_NODE 10 @@ -391,9 +401,9 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg) * Reserve 64K size PEM specific resources. The full 16M range * size is required for thunder_pem_init() call. */ - res_pem->end = res_pem->start + SZ_64K - 1; + resource_set_size(res_pem, SZ_64K); thunder_pem_reserve_range(dev, root->segment, res_pem); - res_pem->end = res_pem->start + SZ_16M - 1; + resource_set_size(res_pem, SZ_16M); /* Reserve PCI configuration space as well. */ thunder_pem_reserve_range(dev, root->segment, &cfg->res); @@ -402,8 +412,8 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg) return thunder_pem_init(dev, cfg, res_pem); } -struct pci_ecam_ops thunder_pem_ecam_ops = { - .bus_shift = 24, +const struct pci_ecam_ops thunder_pem_ecam_ops = { + .bus_shift = THUNDER_PCIE_ECAM_BUS_SHIFT, .init = thunder_pem_acpi_init, .pci_ops = { .map_bus = pci_ecam_map_bus, @@ -439,8 +449,8 @@ static int thunder_pem_platform_init(struct pci_config_window *cfg) return thunder_pem_init(dev, cfg, res_pem); } -static struct pci_ecam_ops pci_thunder_pem_ops = { - .bus_shift = 24, +static const struct pci_ecam_ops pci_thunder_pem_ops = { + .bus_shift = THUNDER_PCIE_ECAM_BUS_SHIFT, .init = thunder_pem_platform_init, .pci_ops = { .map_bus = pci_ecam_map_bus, @@ -450,22 +460,20 @@ static struct pci_ecam_ops pci_thunder_pem_ops = { }; static const struct of_device_id thunder_pem_of_match[] = { - { .compatible = "cavium,pci-host-thunder-pem" }, + { + .compatible = "cavium,pci-host-thunder-pem", + .data = &pci_thunder_pem_ops, + }, { }, }; -static int thunder_pem_probe(struct platform_device *pdev) -{ - return pci_host_common_probe(pdev, &pci_thunder_pem_ops); -} - static struct platform_driver thunder_pem_driver = { .driver = { .name = KBUILD_MODNAME, .of_match_table = thunder_pem_of_match, .suppress_bind_attrs = true, }, - .probe = thunder_pem_probe, + .probe = pci_host_common_probe, }; builtin_platform_driver(thunder_pem_driver); |