Commit 40ad3e54 authored by Yifan Zha's avatar Yifan Zha Committed by Alex Deucher
Browse files

drm/amdgpu: Skip the VRAM base offset on SRIOV 



[Why]
As VF cannot read MMMC_VM_FB_OFFSET with L1 Policy(read 0xffffffff).
It leads to driver get the incorrect vram base offset.

[How]
Since SR-IOV is dGPU only, skip reading this register and set the
fb_offest to 0.

Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarYifan Zha <Yifan.Zha@amd.com>
Signed-off-by: default avatarHorace Chen <horace.chen@amd.com>
Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5818eae5

drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c

+4 −1
Original line number Diff line number Diff line
@@ -649,6 +649,9 @@ static void gmc_v11_0_vram_gtt_location(struct amdgpu_device *adev, 
	amdgpu_gmc_gart_location(adev, mc);



	/* base offset of vram pages */

	if (amdgpu_sriov_vf(adev))

		adev->vm_manager.vram_base_offset = 0;

	else

		adev->vm_manager.vram_base_offset = adev->mmhub.funcs->get_mc_fb_offset(adev);

}