diff options
Diffstat (limited to 'arch/x86_64/pci/mmconfig_64.c')
-rw-r--r-- | arch/x86_64/pci/mmconfig_64.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/arch/x86_64/pci/mmconfig_64.c b/arch/x86_64/pci/mmconfig_64.c deleted file mode 100644 index 4095e4d66a1..00000000000 --- a/arch/x86_64/pci/mmconfig_64.c +++ /dev/null @@ -1,157 +0,0 @@ -/* - * mmconfig.c - Low-level direct PCI config space access via MMCONFIG - * - * This is an 64bit optimized version that always keeps the full mmconfig - * space mapped. This allows lockless config space operation. - */ - -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/acpi.h> -#include <linux/bitmap.h> -#include <asm/e820.h> - -#include "pci.h" - -/* Static virtual mapping of the MMCONFIG aperture */ -struct mmcfg_virt { - struct acpi_mcfg_allocation *cfg; - char __iomem *virt; -}; -static struct mmcfg_virt *pci_mmcfg_virt; - -static char __iomem *get_virt(unsigned int seg, unsigned bus) -{ - struct acpi_mcfg_allocation *cfg; - int cfg_num; - - for (cfg_num = 0; cfg_num < pci_mmcfg_config_num; cfg_num++) { - cfg = pci_mmcfg_virt[cfg_num].cfg; - if (cfg->pci_segment == seg && - (cfg->start_bus_number <= bus) && - (cfg->end_bus_number >= bus)) - return pci_mmcfg_virt[cfg_num].virt; - } - - /* Fall back to type 0 */ - return NULL; -} - -static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn) -{ - char __iomem *addr; - if (seg == 0 && bus < PCI_MMCFG_MAX_CHECK_BUS && - test_bit(32*bus + PCI_SLOT(devfn), pci_mmcfg_fallback_slots)) - return NULL; - addr = get_virt(seg, bus); - if (!addr) - return NULL; - return addr + ((bus << 20) | (devfn << 12)); -} - -static int pci_mmcfg_read(unsigned int seg, unsigned int bus, - unsigned int devfn, int reg, int len, u32 *value) -{ - char __iomem *addr; - - /* Why do we have this when nobody checks it. How about a BUG()!? -AK */ - if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) { - *value = -1; - return -EINVAL; - } - - addr = pci_dev_base(seg, bus, devfn); - if (!addr) - return pci_conf1_read(seg,bus,devfn,reg,len,value); - - switch (len) { - case 1: - *value = mmio_config_readb(addr + reg); - break; - case 2: - *value = mmio_config_readw(addr + reg); - break; - case 4: - *value = mmio_config_readl(addr + reg); - break; - } - - return 0; -} - -static int pci_mmcfg_write(unsigned int seg, unsigned int bus, - unsigned int devfn, int reg, int len, u32 value) -{ - char __iomem *addr; - - /* Why do we have this when nobody checks it. How about a BUG()!? -AK */ - if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) - return -EINVAL; - - addr = pci_dev_base(seg, bus, devfn); - if (!addr) - return pci_conf1_write(seg,bus,devfn,reg,len,value); - - switch (len) { - case 1: - mmio_config_writeb(addr + reg, value); - break; - case 2: - mmio_config_writew(addr + reg, value); - break; - case 4: - mmio_config_writel(addr + reg, value); - break; - } - - return 0; -} - -static struct pci_raw_ops pci_mmcfg = { - .read = pci_mmcfg_read, - .write = pci_mmcfg_write, -}; - -static void __iomem * __init mcfg_ioremap(struct acpi_mcfg_allocation *cfg) -{ - void __iomem *addr; - u32 size; - - size = (cfg->end_bus_number + 1) << 20; - addr = ioremap_nocache(cfg->address, size); - if (addr) { - printk(KERN_INFO "PCI: Using MMCONFIG at %Lx - %Lx\n", - cfg->address, cfg->address + size - 1); - } - return addr; -} - -int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus, - unsigned int devfn) -{ - return pci_dev_base(seg, bus, devfn) != NULL; -} - -int __init pci_mmcfg_arch_init(void) -{ - int i; - pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) * - pci_mmcfg_config_num, GFP_KERNEL); - if (pci_mmcfg_virt == NULL) { - printk(KERN_ERR "PCI: Can not allocate memory for mmconfig structures\n"); - return 0; - } - - for (i = 0; i < pci_mmcfg_config_num; ++i) { - pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i]; - pci_mmcfg_virt[i].virt = mcfg_ioremap(&pci_mmcfg_config[i]); - if (!pci_mmcfg_virt[i].virt) { - printk(KERN_ERR "PCI: Cannot map mmconfig aperture for " - "segment %d\n", - pci_mmcfg_config[i].pci_segment); - return 0; - } - } - raw_pci_ops = &pci_mmcfg; - return 1; -} |