From b0a3bbf947f6ed690336cec1f6cde2a30d082dbb Mon Sep 17 00:00:00 2001
From: Gavin Wan <Gavin.Wan@amd.com>
Date: Mon, 3 Apr 2023 17:49:41 -0400
Subject: [PATCH] drm/amdgpu: Skip using MC FB Offset when APU flag is set for
SRIOV.
The MC_VM_FB_OFFSET is PF only register. It cannot be read on VF.
So, the driver should not use MC_VM_FB_OFFSET address to set the
address of dev->gmc.aper_base.
Signed-off-by: Gavin Wan <Gavin.Wan@amd.com>
Reviewed-by: Zhigang Luo <zhigang.luo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 1653d77df3ba3..58bcd1e1f1b6e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1644,7 +1644,8 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev)
*/
/* check whether both host-gpu and gpu-gpu xgmi links exist */
- if (((adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev)) ||
+ if ((!amdgpu_sriov_vf(adev) &&
+ (adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev)) ||
(adev->gmc.xgmi.supported &&
adev->gmc.xgmi.connected_to_cpu)) {
adev->gmc.aper_base =
--
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