diff options
| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2009-11-14 03:35:04 +0300 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-11-25 02:30:36 +0300 |
| commit | f6e1d8cc38b3776038fb15d3acc82ed8bb552f82 (patch) | |
| tree | d6ff3745b8f3843bad4cf284e653e38ba3b0a693 /arch/x86/pci | |
| parent | 8c57786ad3d921713c7ad8e44132aa537a1d0fec (diff) | |
| download | linux-f6e1d8cc38b3776038fb15d3acc82ed8bb552f82.tar.xz | |
x86/PCI: MMCONFIG: add lookup function
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>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/mmconfig-shared.c | 12 | ||||
| -rw-r--r-- | arch/x86/pci/mmconfig_32.c | 11 | ||||
| -rw-r--r-- | arch/x86/pci/mmconfig_64.c | 23 |
3 files changed, 19 insertions, 27 deletions
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c index 71d69b88fa33..b19d1e54201e 100644 --- a/arch/x86/pci/mmconfig-shared.c +++ b/arch/x86/pci/mmconfig-shared.c @@ -97,6 +97,18 @@ static __init struct pci_mmcfg_region *pci_mmconfig_add(int segment, int start, return new; } +struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus) +{ + struct pci_mmcfg_region *cfg; + + list_for_each_entry(cfg, &pci_mmcfg_list, list) + if (cfg->segment == segment && + cfg->start_bus <= bus && bus <= cfg->end_bus) + return cfg; + + return NULL; +} + static const char __init *pci_mmcfg_e7520(void) { u32 win; diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c index c04523e09649..90d5fd476ed4 100644 --- a/arch/x86/pci/mmconfig_32.c +++ b/arch/x86/pci/mmconfig_32.c @@ -27,15 +27,10 @@ static int mmcfg_last_accessed_cpu; */ static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn) { - struct pci_mmcfg_region *cfg; + struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus); - list_for_each_entry(cfg, &pci_mmcfg_list, list) - if (cfg->segment == seg && - (cfg->start_bus <= bus) && - (cfg->end_bus >= bus)) - return cfg->address; - - /* Fall back to type 0 */ + if (cfg) + return cfg->address; return 0; } diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c index cfa6cdb6d262..e783841bd1d7 100644 --- a/arch/x86/pci/mmconfig_64.c +++ b/arch/x86/pci/mmconfig_64.c @@ -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, |