drm/amdgpu: Use different gart table parameters for 2-level gart table

If use gart for FB translation, we will squeeze vram into
sysvm aperture. This requires 2 level gart table. Add
page table depth and page table block size parameters
to gmc. This is prepare work to 2-level gart table
construction
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Christian Konig <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -244,6 +244,9 @@ struct amdgpu_gmc {
 	struct amdgpu_xgmi xgmi;
 	struct amdgpu_irq_src	ecc_irq;
 	int noretry;
+
+	uint32_t	vmid0_page_table_block_size;
+	uint32_t	vmid0_page_table_depth;
 };
 
 #define amdgpu_gmc_flush_gpu_tlb(adev, vmid, vmhub, type) ((adev)->gmc.gmc_funcs->flush_gpu_tlb((adev), (vmid), (vmhub), (type)))

drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c

@@ -189,7 +189,10 @@ static void gfxhub_v1_0_enable_system_domain(struct amdgpu_device *adev)
 
 	tmp = RREG32_SOC15(GC, 0, mmVM_CONTEXT0_CNTL);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
-	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
+	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH,
+			adev->gmc.vmid0_page_table_depth);
+	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_BLOCK_SIZE,
+			adev->gmc.vmid0_page_table_block_size);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL,
 			    RETRY_PERMISSION_OR_INVALID_PAGE_FAULT, 0);
 	WREG32_SOC15(GC, 0, mmVM_CONTEXT0_CNTL, tmp);

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

@@ -1363,6 +1363,15 @@ static int gmc_v9_0_gart_init(struct amdgpu_device *adev)
 		WARN(1, "VEGA10 PCIE GART already initialized\n");
 		return 0;
 	}
+
+	if (adev->gmc.xgmi.connected_to_cpu) {
+		adev->gmc.vmid0_page_table_depth = 1;
+		adev->gmc.vmid0_page_table_block_size = 12;
+	} else {
+		adev->gmc.vmid0_page_table_depth = 0;
+		adev->gmc.vmid0_page_table_block_size = 0;
+	}
+
 	/* Initialize common gart structure */
 	r = amdgpu_gart_init(adev);
 	if (r)

drivers/gpu/drm/amd/amdgpu/mmhub_v1_7.c

@@ -198,7 +198,10 @@ static void mmhub_v1_7_enable_system_domain(struct amdgpu_device *adev)
 
 	tmp = RREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_CNTL);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
-	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
+	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH,
+			adev->gmc.vmid0_page_table_depth);
+	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL, PAGE_TABLE_BLOCK_SIZE,
+			adev->gmc.vmid0_page_table_block_size);
 	tmp = REG_SET_FIELD(tmp, VM_CONTEXT0_CNTL,
 			    RETRY_PERMISSION_OR_INVALID_PAGE_FAULT, 0);
 	WREG32_SOC15(MMHUB, 0, regVM_CONTEXT0_CNTL, tmp);