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| author | dean gaudet <dean@arctic.org> | 2007-08-10 22:30:59 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-11 15:58:12 -0700 |
| commit | 3320ad994afb2c44ad34b3b34c3c5cf0da297331 (patch) | |
| tree | 7eb9c73a0513f96a7af3c598cd3103cbf4da5043 /arch/i386/pci/mmconfig.c | |
| parent | 9535239f6bc99f68e0cfae44505ad402b53ed24c (diff) | |
| download | op-kernel-dev-3320ad994afb2c44ad34b3b34c3c5cf0da297331.zip op-kernel-dev-3320ad994afb2c44ad34b3b34c3c5cf0da297331.tar.gz | |
x86: Work around mmio config space quirk on AMD Fam10h
Some broken devices have been discovered to require %al/%ax/%eax registers
for MMIO config space accesses. Modify mmconfig.c to use these registers
explicitly (rather than modify the global readb/writeb/etc inlines).
AK: also changed i386 to always use eax
AK: moved change to extended space probing to different patch
AK: reworked with inlines according to Linus' requirements.
AK: improve comments.
Signed-off-by: dean gaudet <dean@arctic.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386/pci/mmconfig.c')
| -rw-r--r-- | arch/i386/pci/mmconfig.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c index bb1afd9..0d46b7a 100644 --- a/arch/i386/pci/mmconfig.c +++ b/arch/i386/pci/mmconfig.c @@ -82,16 +82,15 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus, switch (len) { case 1: - *value = readb(mmcfg_virt_addr + reg); + *value = mmio_config_readb(mmcfg_virt_addr + reg); break; case 2: - *value = readw(mmcfg_virt_addr + reg); + *value = mmio_config_readw(mmcfg_virt_addr + reg); break; case 4: - *value = readl(mmcfg_virt_addr + reg); + *value = mmio_config_readl(mmcfg_virt_addr + reg); break; } - spin_unlock_irqrestore(&pci_config_lock, flags); return 0; @@ -116,16 +115,15 @@ static int pci_mmcfg_write(unsigned int seg, unsigned int bus, switch (len) { case 1: - writeb(value, mmcfg_virt_addr + reg); + mmio_config_writeb(mmcfg_virt_addr, value); break; case 2: - writew(value, mmcfg_virt_addr + reg); + mmio_config_writew(mmcfg_virt_addr, value); break; case 4: - writel(value, mmcfg_virt_addr + reg); + mmio_config_writel(mmcfg_virt_addr, value); break; } - spin_unlock_irqrestore(&pci_config_lock, flags); return 0; |
