From: Yifan Zha <Yifan.Zha@amd.com>
Date: Tue, 25 Oct 2022 07:47:19 +0000 (+0800)
Subject: drm/amdgpu: Skip program gfxhub_v3_0_3 system aperture registers under SRIOV
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2c763f37d0a08d39c1a0b1318fa82896c31a6c9d;p=linux.git

drm/amdgpu: Skip program gfxhub_v3_0_3 system aperture registers under SRIOV

[Why]
gfxhub_v3_0_3 system aperture registers are removed from RLCG register access range.

[How]
Skip access gfxhub_v3_0_3 system aperture registers under SRIOV VF.
These registers will be programmed on host side.

Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0_3.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0_3.c
index 5d3fffd4929ff..716ae6f2aefed 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0_3.c
@@ -154,6 +154,9 @@ static void gfxhub_v3_0_3_init_system_aperture_regs(struct amdgpu_device *adev)
 {
 	uint64_t value;
 
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	/* Disable AGP. */
 	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_BASE, 0);
 	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_TOP, 0);