diff options
| author | Oak Zeng <Oak.Zeng@amd.com> | 2020-09-15 14:47:30 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-03-23 22:58:32 -0400 |
| commit | 6e93ef8b6884172a36728d0a3018b406541f34af (patch) | |
| tree | 727c9a73bd7c79bfdbd2c7fb2358cc769abda1e3 /drivers/gpu/drm/amd/amdgpu | |
| parent | f1dc12ca56b25a37559e82c294be1250ed5858e4 (diff) | |
drm/amdgpu: Modify comments of vram_start/end
Modify the comment to reflect the fact that, if
use GART for vram address translation for vmid0,
[vram_start, vram_end] will be placed inside SYSVM
aperture, together with GART.
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Christian Konig <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h index 11c6977c0b35..f1a21e110610 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h @@ -190,10 +190,13 @@ struct amdgpu_gmc { u64 gart_end; /* Frame buffer aperture of this GPU device. Different from * fb_start (see below), this only covers the local GPU device. - * Driver get fb_start from MC_VM_FB_LOCATION_BASE (set by vbios) - * and calculate vram_start of this local device by adding an - * offset inside the XGMI hive. - * Under VMID0, logical address == MC address + * If use FB aperture to access FB, driver get fb_start from + * MC_VM_FB_LOCATION_BASE (set by vbios) and calculate vram_start + * of this local device by adding an offset inside the XGMI hive. + * If use GART table for VMID0 FB access, driver finds a hole in + * VMID0's virtual address space to place the SYSVM aperture inside + * which the first part is vram and the second part is gart (covering + * sram) */ u64 vram_start; u64 vram_end; |