drm/amdgpu: fix the gart table cleared issue for S3

Something writes over the first 8 MB so reserve this
on vega10 until we root cause it.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -607,6 +607,7 @@ struct amdgpu_mc {
 	uint32_t                srbm_soft_reset;
 	struct amdgpu_mode_mc_save save;
 	bool			prt_warning;
+	uint64_t		stolen_size;
 	/* apertures */
 	u64					shared_aperture_start;
 	u64					shared_aperture_end;

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

@@ -1121,7 +1121,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 	/* Change the size here instead of the init above so only lpfn is affected */
 	amdgpu_ttm_set_active_vram_size(adev, adev->mc.visible_vram_size);
 
-	r = amdgpu_bo_create(adev, 256 * 1024, PAGE_SIZE, true,
+	r = amdgpu_bo_create(adev, adev->mc.stolen_size, PAGE_SIZE, true,
 			     AMDGPU_GEM_DOMAIN_VRAM,
 			     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 			     AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,

drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c

@@ -834,6 +834,8 @@ static int gmc_v6_0_sw_init(void *handle)
 
 	adev->mc.mc_mask = 0xffffffffffULL;
 
+	adev->mc.stolen_size = 256 * 1024;
+
 	adev->need_dma32 = false;
 	dma_bits = adev->need_dma32 ? 32 : 40;
 	r = pci_set_dma_mask(adev->pdev, DMA_BIT_MASK(dma_bits));

drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c

@@ -970,6 +970,8 @@ static int gmc_v7_0_sw_init(void *handle)
 	 */
 	adev->mc.mc_mask = 0xffffffffffULL; /* 40 bit MC */
 
+	adev->mc.stolen_size = 256 * 1024;
+
 	/* set DMA mask + need_dma32 flags.
 	 * PCIE - can handle 40-bits.
 	 * IGP - can handle 40-bits

drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c

@@ -1054,6 +1054,8 @@ static int gmc_v8_0_sw_init(void *handle)
 	 */
 	adev->mc.mc_mask = 0xffffffffffULL; /* 40 bit MC */
 
+	adev->mc.stolen_size = 256 * 1024;
+
 	/* set DMA mask + need_dma32 flags.
 	 * PCIE - can handle 40-bits.
 	 * IGP - can handle 40-bits

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -572,6 +572,12 @@ static int gmc_v9_0_sw_init(void *handle)
 	 */
 	adev->mc.mc_mask = 0xffffffffffffULL; /* 48 bit MC */
 
+	/*
+	 * It needs to reserve 8M stolen memory for vega10
+	 * TODO: Figure out how to avoid that...
+	 */
+	adev->mc.stolen_size = 8 * 1024 * 1024;
+
 	/* set DMA mask + need_dma32 flags.
 	 * PCIE - can handle 44-bits.
 	 * IGP - can handle 44-bits