diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2014-01-04 05:28:06 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-01-07 22:36:55 +0400 |
| commit | 545b0a746b79f54a45cd3b595dce67abbf35233f (patch) | |
| tree | da9b8ceb1a94fe321bfd5308d557d2f09533e449 /drivers/char/agp | |
| parent | 5acc4ce44cd0a9cf5dbcfe50085708e9156e0177 (diff) | |
| download | linux-545b0a746b79f54a45cd3b595dce67abbf35233f.tar.xz | |
agp/intel: Support 64-bit GMADR
Per the Intel 915G/915GV/... Chipset spec (document number 301467-005),
GMADR is a standard PCI BAR.
The PCI core reads GMADR at enumeration-time. Use pci_bus_address()
instead of reading it again in the driver. This works correctly for both
32-bit and 64-bit BARs. The spec above only mentions 32-bit GMADR, but
Yinghai's patch (link below) indicates some devices have a 64-bit GMADR.
[bhelgaas: reworked starting from http://lkml.kernel.org/r/1385851238-21085-13-git-send-email-yinghai@kernel.org]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/char/agp')
| -rw-r--r-- | drivers/char/agp/intel-agp.h | 4 | ||||
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 12 |
2 files changed, 6 insertions, 10 deletions
diff --git a/drivers/char/agp/intel-agp.h b/drivers/char/agp/intel-agp.h index 1042c1b90376..0bf5590fd0f9 100644 --- a/drivers/char/agp/intel-agp.h +++ b/drivers/char/agp/intel-agp.h @@ -55,7 +55,7 @@ #define INTEL_I860_ERRSTS 0xc8 /* Intel i810 registers */ -#define I810_GMADDR 0x10 +#define I810_GMADR_BAR 0 #define I810_MMADDR 0x14 #define I810_PTE_BASE 0x10000 #define I810_PTE_MAIN_UNCACHED 0x00000000 @@ -113,7 +113,7 @@ #define INTEL_I850_ERRSTS 0xc8 /* intel 915G registers */ -#define I915_GMADDR 0x18 +#define I915_GMADR_BAR 2 #define I915_MMADDR 0x10 #define I915_PTEADDR 0x1C #define I915_GMCH_GMS_STOLEN_48M (0x6 << 4) diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 54202ffcf467..560f66bffebb 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -608,9 +608,8 @@ static bool intel_gtt_can_wc(void) static int intel_gtt_init(void) { - u32 gma_addr; u32 gtt_map_size; - int ret; + int ret, bar; ret = intel_private.driver->setup(); if (ret != 0) @@ -660,14 +659,11 @@ static int intel_gtt_init(void) } if (INTEL_GTT_GEN <= 2) - pci_read_config_dword(intel_private.pcidev, I810_GMADDR, - &gma_addr); + bar = I810_GMADR_BAR; else - pci_read_config_dword(intel_private.pcidev, I915_GMADDR, - &gma_addr); - - intel_private.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK); + bar = I915_GMADR_BAR; + intel_private.gma_bus_addr = pci_bus_address(intel_private.pcidev, bar); return 0; } |