diff options
| -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; |