drm/amdgpu: move validation of the VM size into the VM code

This moves validation of the VM size parameter into amdgpu_vm_adjust_size().
Signed-off-by: Christian König <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_device.c

@@ -1187,22 +1187,8 @@ static void amdgpu_check_vm_size(struct amdgpu_device *adev)
 	if (amdgpu_vm_size < 1) {
 		dev_warn(adev->dev, "VM size (%d) too small, min is 1GB\n",
 			 amdgpu_vm_size);
-		goto def_value;
+		amdgpu_vm_size = -1;
 	}
-
-	/*
-	 * Max GPUVM size for Cayman, SI, CI VI are 40 bits.
-	 */
-	if (amdgpu_vm_size > 1024) {
-		dev_warn(adev->dev, "VM size (%d) too large, max is 1TB\n",
-			 amdgpu_vm_size);
-		goto def_value;
-	}
-
-	return;
-
-def_value:
-	amdgpu_vm_size = -1;
 }
 
 /**

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

@@ -2580,13 +2580,22 @@ static uint32_t amdgpu_vm_get_block_size(uint64_t vm_size)
  * @vm_size: the default vm size if it's set auto
  */
 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t vm_size,
-			   uint32_t fragment_size_default, unsigned max_level)
+			   uint32_t fragment_size_default, unsigned max_level,
+			   unsigned max_bits)
 {
 	uint64_t tmp;
 
 	/* adjust vm size first */
-	if (amdgpu_vm_size != -1)
+	if (amdgpu_vm_size != -1) {
+		unsigned max_size = 1 << (max_bits - 30);
+
 		vm_size = amdgpu_vm_size;
+		if (vm_size > max_size) {
+			dev_warn(adev->dev, "VM size (%d) too large, max is %u GB\n",
+				 amdgpu_vm_size, max_size);
+			vm_size = max_size;
+		}
+	}
 
 	adev->vm_manager.max_pfn = (uint64_t)vm_size << 18;
 

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

@@ -325,7 +325,8 @@ struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
 		      struct amdgpu_bo_va *bo_va);
 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t vm_size,
-			   uint32_t fragment_size_default, unsigned max_level);
+			   uint32_t fragment_size_default, unsigned max_level,
+			   unsigned max_bits);
 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
 				  struct amdgpu_job *job);

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

@@ -832,7 +832,7 @@ static int gmc_v6_0_sw_init(void *handle)
 	if (r)
 		return r;
 
-	amdgpu_vm_adjust_size(adev, 64, 9, 1);
+	amdgpu_vm_adjust_size(adev, 64, 9, 1, 40);
 
 	adev->mc.mc_mask = 0xffffffffffULL;
 

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

@@ -971,7 +971,7 @@ static int gmc_v7_0_sw_init(void *handle)
 	 * Currently set to 4GB ((1 << 20) 4k pages).
 	 * Max GPUVM size for cayman and SI is 40 bits.
 	 */
-	amdgpu_vm_adjust_size(adev, 64, 9, 1);
+	amdgpu_vm_adjust_size(adev, 64, 9, 1, 40);
 
 	/* Set the internal MC address mask
 	 * This is the max address of the GPU's

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

@@ -1068,7 +1068,7 @@ static int gmc_v8_0_sw_init(void *handle)
 	 * Currently set to 4GB ((1 << 20) 4k pages).
 	 * Max GPUVM size for cayman and SI is 40 bits.
 	 */
-	amdgpu_vm_adjust_size(adev, 64, 9, 1);
+	amdgpu_vm_adjust_size(adev, 64, 9, 1, 40);
 
 	/* Set the internal MC address mask
 	 * This is the max address of the GPU's

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

@@ -770,10 +770,10 @@ static int gmc_v9_0_sw_init(void *handle)
 	case CHIP_RAVEN:
 		adev->mc.vram_type = AMDGPU_VRAM_TYPE_UNKNOWN;
 		if (adev->rev_id == 0x0 || adev->rev_id == 0x1)
-			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3);
+			amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
 		else
 			/* vm_size is 64GB for legacy 2-level page support */
-			amdgpu_vm_adjust_size(adev, 64, 9, 1);
+			amdgpu_vm_adjust_size(adev, 64, 9, 1, 48);
 		break;
 	case CHIP_VEGA10:
 		/* XXX Don't know how to get VRAM type yet. */
@@ -783,7 +783,7 @@ static int gmc_v9_0_sw_init(void *handle)
 		 * vm size is 256TB (48bit), maximum size of Vega10,
 		 * block size 512 (9bit)
 		 */
-		amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3);
+		amdgpu_vm_adjust_size(adev, 256 * 1024, 9, 3, 48);
 		break;
 	default:
 		break;