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Diffstat (limited to 'arch/x86_64/pci/mmconfig_64.c')
-rw-r--r--arch/x86_64/pci/mmconfig_64.c157
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;
-}