RE: [PATCH 3/5] drm/amdgpu: remove sriov vf mmhub system aperture and fb location programming

["Liu, Shaoyun" <Shaoyun.Liu@xxxxxxx>]

[AMD Official Use Only]

Looks ok to me .

-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Zhigang Luo
Sent: Thursday, June 3, 2021 10:13 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Luo, Zhigang <Zhigang.Luo@xxxxxxx>
Subject: [PATCH 3/5] drm/amdgpu: remove sriov vf mmhub system aperture and fb location programming

host driver programmed mmhub system aperture and fb location for vf, no need to program in guest side.

Signed-off-by: Zhigang Luo <zhigang.luo@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c
index 998e674f9369..f5f7181f9af5 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c
@@ -111,6 +111,9 @@ static void mmhub_v1_7_init_system_aperture_regs(struct amdgpu_device *adev)
 	WREG32_SOC15(MMHUB, 0, regMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
 	WREG32_SOC15(MMHUB, 0, regMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);
 
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	/* Program the system aperture low logical page number. */
 	WREG32_SOC15(MMHUB, 0, regMC_VM_SYSTEM_APERTURE_LOW_ADDR,
 		     min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18); @@ -129,8 +132,6 @@ static void mmhub_v1_7_init_system_aperture_regs(struct amdgpu_device *adev)
 		WREG32_SOC15(MMHUB, 0, regMC_VM_SYSTEM_APERTURE_LOW_ADDR, 0x3FFFFFFF);
 		WREG32_SOC15(MMHUB, 0, regMC_VM_SYSTEM_APERTURE_HIGH_ADDR, 0);
 	}
-	if (amdgpu_sriov_vf(adev))
-		return;
 
 	/* Set default page address. */
 	value = amdgpu_gmc_vram_mc2pa(adev, adev->vram_scratch.gpu_addr); @@ -331,18 +332,6 @@ static void mmhub_v1_7_program_invalidation(struct amdgpu_device *adev)
 
 static int mmhub_v1_7_gart_enable(struct amdgpu_device *adev)  {
-	if (amdgpu_sriov_vf(adev)) {
-		/*
-		 * MC_VM_FB_LOCATION_BASE/TOP is NULL for VF, becuase they are
-		 * VF copy registers so vbios post doesn't program them, for
-		 * SRIOV driver need to program them
-		 */
-		WREG32_SOC15(MMHUB, 0, regMC_VM_FB_LOCATION_BASE,
-			     adev->gmc.vram_start >> 24);
-		WREG32_SOC15(MMHUB, 0, regMC_VM_FB_LOCATION_TOP,
-			     adev->gmc.vram_end >> 24);
-	}
-
 	/* GART Enable. */
 	mmhub_v1_7_init_gart_aperture_regs(adev);
 	mmhub_v1_7_init_system_aperture_regs(adev);
--
2.17.1

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