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drm/amdgpu: limit visible vram if it's smaller than the BAR

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In some cases the amount of vram may be less than the BAR size,
if so, limit visible vram to the amount of actual vram, not the
BAR size.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2015-12-09 15:36:40 -05:00
parent b70f014d58
commit a1493cd575
2 changed files with 8 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
View File

@ -370,6 +370,10 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev)
adev->mc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
adev->mc.visible_vram_size = adev->mc.aper_size;
/* In case the PCI BAR is larger than the actual amount of vram */
if (adev->mc.visible_vram_size > adev->mc.real_vram_size)
adev->mc.visible_vram_size = adev->mc.real_vram_size;
/* unless the user had overridden it, set the gart
* size equal to the 1024 or vram, whichever is larger.
*/

4
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
View File

@ -476,6 +476,10 @@ static int gmc_v8_0_mc_init(struct amdgpu_device *adev)
adev->mc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
adev->mc.visible_vram_size = adev->mc.aper_size;
/* In case the PCI BAR is larger than the actual amount of vram */
if (adev->mc.visible_vram_size > adev->mc.real_vram_size)
adev->mc.visible_vram_size = adev->mc.real_vram_size;
/* unless the user had overridden it, set the gart
* size equal to the 1024 or vram, whichever is larger.
*/