drm/amdgpu: Make max_pfn 64-bit

With 4-level page tables the maximum VM size is 256TB. That's 64G
pages, which can't be represented in 32-bit.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@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_vm.c

@@ -336,7 +336,7 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 			struct amdgpu_vm *vm,
 			uint64_t saddr, uint64_t size)
 {
-	unsigned last_pfn;
+	uint64_t last_pfn;
 	uint64_t eaddr;
 
 	/* validate the parameters */
@@ -346,7 +346,7 @@ int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 	eaddr = saddr + size - 1;
 	last_pfn = eaddr / AMDGPU_GPU_PAGE_SIZE;
 	if (last_pfn >= adev->vm_manager.max_pfn) {
-		dev_err(adev->dev, "va above limit (0x%08X >= 0x%08X)\n",
+		dev_err(adev->dev, "va above limit (0x%08llX >= 0x%08llX)\n",
 			last_pfn, adev->vm_manager.max_pfn);
 		return -EINVAL;
 	}

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

@@ -153,7 +153,7 @@ struct amdgpu_vm_manager {
 	u64					fence_context;
 	unsigned				seqno[AMDGPU_MAX_RINGS];
 
-	uint32_t				max_pfn;
+	uint64_t				max_pfn;
 	uint32_t				num_level;
 	/* vram base address for page table entry  */
 	u64					vram_base_offset;

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

@@ -227,8 +227,9 @@ int gfxhub_v1_0_gart_enable(struct amdgpu_device *adev)
 		WREG32(SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32) + i*2, 0);
 		WREG32(SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32) + i*2, 0);
 		WREG32(SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32) + i*2,
-				adev->vm_manager.max_pfn - 1);
-		WREG32(SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32) + i*2, 0);
+			lower_32_bits(adev->vm_manager.max_pfn - 1));
+		WREG32(SOC15_REG_OFFSET(GC, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32) + i*2,
+			upper_32_bits(adev->vm_manager.max_pfn - 1));
 	}
 
 

drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c

@@ -247,8 +247,9 @@ int mmhub_v1_0_gart_enable(struct amdgpu_device *adev)
 		WREG32(SOC15_REG_OFFSET(MMHUB, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32) + i*2, 0);
 		WREG32(SOC15_REG_OFFSET(MMHUB, 0, mmVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32) + i*2, 0);
 		WREG32(SOC15_REG_OFFSET(MMHUB, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32) + i*2,
-				adev->vm_manager.max_pfn - 1);
-		WREG32(SOC15_REG_OFFSET(MMHUB, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32) + i*2, 0);
+			lower_32_bits(adev->vm_manager.max_pfn - 1));
+		WREG32(SOC15_REG_OFFSET(MMHUB, 0, mmVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32) + i*2,
+			upper_32_bits(adev->vm_manager.max_pfn - 1));
 	}
 
 	return 0;