xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/PCI: MMCONFIG: add lookup function

Browse Source 
This patch factors out the search for an MMCONFIG region, which was
previously implemented in both mmconfig_32 and mmconfig_64.  No functional
change.

Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas
2009-11-13 17:35:04 -07:00
committed by Jesse Barnes
parent 8c57786ad3
commit f6e1d8cc38
4 changed files with 20 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
arch/x86/pci/mmconfig_64.c
View File

@@ -14,28 +14,13 @@
#define PREFIX "PCI: "
static char __iomem *get_virt(unsigned int seg, unsigned bus)
{
struct pci_mmcfg_region *cfg;
list_for_each_entry(cfg, &pci_mmcfg_list, list)
if (cfg->segment == seg &&
(cfg->start_bus <= bus) &&
(cfg->end_bus >= bus))
return cfg->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;
struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
addr = get_virt(seg, bus);
if (!addr)
return NULL;
return addr + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));
if (cfg && cfg->virt)
return cfg->virt + (PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12));
return NULL;
}
static int pci_mmcfg_read(unsigned int seg, unsigned int bus,