agp/intel: Use pci_bus_address() to get GTTADR bus address
Per the Intel 915G/915GV/... Chipset spec (document number 301467-005), GTTADR is a standard PCI BAR. The PCI core reads GTTADR 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 GTTADR, but we should still use the standard interface. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -115,7 +115,7 @@
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/* intel 915G registers */
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#define I915_GMADR_BAR 2
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#define I915_MMADR_BAR 0
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#define I915_PTEADDR 0x1C
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#define I915_PTE_BAR 3
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#define I915_GMCH_GMS_STOLEN_48M (0x6 << 4)
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#define I915_GMCH_GMS_STOLEN_64M (0x7 << 4)
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#define G33_GMCH_GMS_STOLEN_128M (0x8 << 4)
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@ -1102,7 +1102,7 @@ static void i965_write_entry(dma_addr_t addr,
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static int i9xx_setup(void)
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{
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u32 reg_addr, gtt_addr;
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u32 reg_addr;
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int size = KB(512);
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reg_addr = pci_bus_address(intel_private.pcidev, I915_MMADR_BAR);
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@ -1113,9 +1113,8 @@ static int i9xx_setup(void)
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switch (INTEL_GTT_GEN) {
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case 3:
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pci_read_config_dword(intel_private.pcidev,
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I915_PTEADDR, >t_addr);
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intel_private.gtt_phys_addr = gtt_addr;
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intel_private.gtt_phys_addr =
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pci_bus_address(intel_private.pcidev, I915_PTE_BAR);
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break;
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case 5:
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intel_private.gtt_phys_addr = reg_addr + MB(2);
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