drm/amdgpu: remove SRIOV VF FB location programming

For SRIOV VF, FB location is programmed by host driver, no need to
program it in guest driver.

v2: squash in unused variable removal
Signed-off-by: Zhigang Luo <Zhigang.Luo@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c

@@ -402,22 +402,6 @@ static void gfxhub_v1_2_xcc_program_invalidation(struct amdgpu_device *adev,
 static int gfxhub_v1_2_xcc_gart_enable(struct amdgpu_device *adev,
 				       uint32_t xcc_mask)
 {
-	int i;
-
-	/*
-	 * MC_VM_FB_LOCATION_BASE/TOP is NULL for VF, because they are
-	 * VF copy registers so vbios post doesn't program them, for
-	 * SRIOV driver need to program them
-	 */
-	if (amdgpu_sriov_vf(adev)) {
-		for_each_inst(i, xcc_mask) {
-			WREG32_SOC15_RLC(GC, GET_INST(GC, i), regMC_VM_FB_LOCATION_BASE,
-				     adev->gmc.vram_start >> 24);
-			WREG32_SOC15_RLC(GC, GET_INST(GC, i), regMC_VM_FB_LOCATION_TOP,
-				     adev->gmc.vram_end >> 24);
-		}
-	}
-
 	/* GART Enable. */
 	gfxhub_v1_2_xcc_init_gart_aperture_regs(adev, xcc_mask);
 	gfxhub_v1_2_xcc_init_system_aperture_regs(adev, xcc_mask);

drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c

@@ -413,18 +413,6 @@ static void mmhub_v1_8_program_invalidation(struct amdgpu_device *adev)
 
 static int mmhub_v1_8_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_8_init_gart_aperture_regs(adev);
 	mmhub_v1_8_init_system_aperture_regs(adev);