drm/i915, agp/intel: Fix stolen memory size on Sandybridge
New memory control config reg at 0x50 should be used for stolen
memory size detection on Sandybridge.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 281faca..3e658d6 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1099,60 +1099,118 @@
else
overhead = (*aperture_size / 1024) + 4096;
- switch (tmp & INTEL_GMCH_GMS_MASK) {
- case INTEL_855_GMCH_GMS_DISABLED:
- /* XXX: This is what my A1 silicon has. */
- if (IS_GEN6(dev)) {
- stolen = 64 * 1024 * 1024;
- } else {
+ if (IS_GEN6(dev)) {
+ /* SNB has memory control reg at 0x50.w */
+ pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &tmp);
+
+ switch (tmp & SNB_GMCH_GMS_STOLEN_MASK) {
+ case INTEL_855_GMCH_GMS_DISABLED:
DRM_ERROR("video memory is disabled\n");
return -1;
+ case SNB_GMCH_GMS_STOLEN_32M:
+ stolen = 32 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_64M:
+ stolen = 64 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_96M:
+ stolen = 96 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_128M:
+ stolen = 128 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_160M:
+ stolen = 160 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_192M:
+ stolen = 192 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_224M:
+ stolen = 224 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_256M:
+ stolen = 256 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_288M:
+ stolen = 288 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_320M:
+ stolen = 320 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_352M:
+ stolen = 352 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_384M:
+ stolen = 384 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_416M:
+ stolen = 416 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_448M:
+ stolen = 448 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_480M:
+ stolen = 480 * 1024 * 1024;
+ break;
+ case SNB_GMCH_GMS_STOLEN_512M:
+ stolen = 512 * 1024 * 1024;
+ break;
+ default:
+ DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
+ tmp & SNB_GMCH_GMS_STOLEN_MASK);
+ return -1;
}
- break;
- case INTEL_855_GMCH_GMS_STOLEN_1M:
- stolen = 1 * 1024 * 1024;
- break;
- case INTEL_855_GMCH_GMS_STOLEN_4M:
- stolen = 4 * 1024 * 1024;
- break;
- case INTEL_855_GMCH_GMS_STOLEN_8M:
- stolen = 8 * 1024 * 1024;
- break;
- case INTEL_855_GMCH_GMS_STOLEN_16M:
- stolen = 16 * 1024 * 1024;
- break;
- case INTEL_855_GMCH_GMS_STOLEN_32M:
- stolen = 32 * 1024 * 1024;
- break;
- case INTEL_915G_GMCH_GMS_STOLEN_48M:
- stolen = 48 * 1024 * 1024;
- break;
- case INTEL_915G_GMCH_GMS_STOLEN_64M:
- stolen = 64 * 1024 * 1024;
- break;
- case INTEL_GMCH_GMS_STOLEN_128M:
- stolen = 128 * 1024 * 1024;
- break;
- case INTEL_GMCH_GMS_STOLEN_256M:
- stolen = 256 * 1024 * 1024;
- break;
- case INTEL_GMCH_GMS_STOLEN_96M:
- stolen = 96 * 1024 * 1024;
- break;
- case INTEL_GMCH_GMS_STOLEN_160M:
- stolen = 160 * 1024 * 1024;
- break;
- case INTEL_GMCH_GMS_STOLEN_224M:
- stolen = 224 * 1024 * 1024;
- break;
- case INTEL_GMCH_GMS_STOLEN_352M:
- stolen = 352 * 1024 * 1024;
- break;
- default:
- DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
- tmp & INTEL_GMCH_GMS_MASK);
- return -1;
+ } else {
+ switch (tmp & INTEL_GMCH_GMS_MASK) {
+ case INTEL_855_GMCH_GMS_DISABLED:
+ DRM_ERROR("video memory is disabled\n");
+ return -1;
+ case INTEL_855_GMCH_GMS_STOLEN_1M:
+ stolen = 1 * 1024 * 1024;
+ break;
+ case INTEL_855_GMCH_GMS_STOLEN_4M:
+ stolen = 4 * 1024 * 1024;
+ break;
+ case INTEL_855_GMCH_GMS_STOLEN_8M:
+ stolen = 8 * 1024 * 1024;
+ break;
+ case INTEL_855_GMCH_GMS_STOLEN_16M:
+ stolen = 16 * 1024 * 1024;
+ break;
+ case INTEL_855_GMCH_GMS_STOLEN_32M:
+ stolen = 32 * 1024 * 1024;
+ break;
+ case INTEL_915G_GMCH_GMS_STOLEN_48M:
+ stolen = 48 * 1024 * 1024;
+ break;
+ case INTEL_915G_GMCH_GMS_STOLEN_64M:
+ stolen = 64 * 1024 * 1024;
+ break;
+ case INTEL_GMCH_GMS_STOLEN_128M:
+ stolen = 128 * 1024 * 1024;
+ break;
+ case INTEL_GMCH_GMS_STOLEN_256M:
+ stolen = 256 * 1024 * 1024;
+ break;
+ case INTEL_GMCH_GMS_STOLEN_96M:
+ stolen = 96 * 1024 * 1024;
+ break;
+ case INTEL_GMCH_GMS_STOLEN_160M:
+ stolen = 160 * 1024 * 1024;
+ break;
+ case INTEL_GMCH_GMS_STOLEN_224M:
+ stolen = 224 * 1024 * 1024;
+ break;
+ case INTEL_GMCH_GMS_STOLEN_352M:
+ stolen = 352 * 1024 * 1024;
+ break;
+ default:
+ DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
+ tmp & INTEL_GMCH_GMS_MASK);
+ return -1;
+ }
}
+
*preallocated_size = stolen - overhead;
*start = overhead;