Revert "drm/amdgpu/gmc11: enable AGP aperture"

This reverts commit 2cfe34e1.
Enable AGP aperture cause SDMA page fault for gfx11.0.2,
so temp disable AGP aperture until SDMA FW resolved this.
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Jack Gui <Jack.Gui@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0.c

@@ -154,11 +154,10 @@ static void gfxhub_v3_0_init_system_aperture_regs(struct amdgpu_device *adev)
 {
 	uint64_t value;
 
-	/* Program the AGP BAR */
+	/* Disable AGP. */
 	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_BASE, 0);
-	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
-	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);
-
+	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_TOP, 0);
+	WREG32_SOC15(GC, 0, regGCMC_VM_AGP_BOT, 0x00FFFFFF);
 
 	/* Program the system aperture low logical page number. */
 	WREG32_SOC15(GC, 0, regGCMC_VM_SYSTEM_APERTURE_LOW_ADDR,

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

@@ -611,7 +611,6 @@ static void gmc_v11_0_vram_gtt_location(struct amdgpu_device *adev,
 
 	amdgpu_gmc_vram_location(adev, &adev->gmc, base);
 	amdgpu_gmc_gart_location(adev, mc);
-	amdgpu_gmc_agp_location(adev, mc);
 
 	/* base offset of vram pages */
 	adev->vm_manager.vram_base_offset = adev->mmhub.funcs->get_mc_fb_offset(adev);

drivers/gpu/drm/amd/amdgpu/mmhub_v3_0.c

@@ -169,10 +169,10 @@ static void mmhub_v3_0_init_system_aperture_regs(struct amdgpu_device *adev)
 	uint64_t value;
 	uint32_t tmp;
 
-	/* Program the AGP BAR */
+	/* Disable AGP. */
 	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BASE, 0);
-	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
-	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);
+	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, 0);
+	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, 0x00FFFFFF);
 
 	if (!amdgpu_sriov_vf(adev)) {
 		/*

drivers/gpu/drm/amd/amdgpu/mmhub_v3_0_2.c

@@ -162,10 +162,10 @@ static void mmhub_v3_0_2_init_system_aperture_regs(struct amdgpu_device *adev)
 	uint64_t value;
 	uint32_t tmp;
 
-	/* Program the AGP BAR */
+	/* Disable AGP. */
 	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BASE, 0);
-	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, adev->gmc.agp_start >> 24);
-	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, adev->gmc.agp_end >> 24);
+	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_TOP, 0);
+	WREG32_SOC15(MMHUB, 0, regMMMC_VM_AGP_BOT, 0x00FFFFFF);
 
 	if (!amdgpu_sriov_vf(adev)) {
 		/*