diff options
| author | Christian König <christian.koenig@amd.com> | 2016-11-04 13:23:41 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-01-27 12:20:44 -0500 |
| commit | f39093059b2f2998198ab1f7a4e0a92e177f0d66 (patch) | |
| tree | c72ed4475ea1c35709c83417c0bf8615c6d424eb /drivers/gpu | |
| parent | 8485b5e1876b46d7c4f63a2cfcec2ee30362a207 (diff) | |
drm/amdgpu: access stolen VRAM directly on KV/KB (v2)
We don't need to use the PCI BAR on APUs. This allows us to access
the full VRAM directly without being limited by the BAR size.
v2: squash in 64bit shift fix
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c index 273b16fb9459..8d05e0c4e3d7 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c @@ -375,9 +375,16 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev) /* size in MB on si */ adev->mc.mc_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL; adev->mc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL; - adev->mc.visible_vram_size = adev->mc.aper_size; + +#ifdef CONFIG_X86_64 + if (adev->flags & AMD_IS_APU) { + adev->mc.aper_base = ((u64)RREG32(mmMC_VM_FB_OFFSET)) << 22; + adev->mc.aper_size = adev->mc.real_vram_size; + } +#endif /* In case the PCI BAR is larger than the actual amount of vram */ + adev->mc.visible_vram_size = adev->mc.aper_size; if (adev->mc.visible_vram_size > adev->mc.real_vram_size) adev->mc.visible_vram_size = adev->mc.real_vram_size; |