drm/amdgpu: allow variable BO struct creation

Allow allocating BO structures with different structure size
than struct amdgpu_bo.

v2: Check bo_ptr_size in all amdgpu_bo_create() caller.
Signed-off-by: Nirmoy Das <nirmoy.das@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_amdkfd.c

@@ -246,6 +246,7 @@ int amdgpu_amdkfd_alloc_gtt_mem(struct kgd_dev *kgd, size_t size,
 	bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = NULL;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
 	if (cp_mqd_gfx9)
 		bp.flags |= AMDGPU_GEM_CREATE_CP_MQD_GFX9;
@@ -327,6 +328,7 @@ int amdgpu_amdkfd_alloc_gws(struct kgd_dev *kgd, size_t size,
 	bp.flags = AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
 	bp.type = ttm_bo_type_device;
 	bp.resv = NULL;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
 	r = amdgpu_bo_create(adev, &bp, &bo);
 	if (r) {

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

@@ -85,6 +85,8 @@ static void amdgpu_benchmark_move(struct amdgpu_device *adev, unsigned size,
 	bp.flags = 0;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = NULL;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
+
 	n = AMDGPU_BENCHMARK_ITERATIONS;
 	r = amdgpu_bo_create(adev, &bp, &sobj);
 	if (r) {

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

@@ -126,6 +126,8 @@ int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev)
 			AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
 		bp.type = ttm_bo_type_kernel;
 		bp.resv = NULL;
+		bp.bo_ptr_size = sizeof(struct amdgpu_bo);
+
 		r = amdgpu_bo_create(adev, &bp, &adev->gart.bo);
 		if (r) {
 			return r;

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

@@ -71,6 +71,8 @@ int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
 	bp.preferred_domain = initial_domain;
 	bp.flags = flags;
 	bp.domain = initial_domain;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
+
 	r = amdgpu_bo_create(adev, &bp, &bo);
 	if (r)
 		return r;

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

@@ -55,6 +55,8 @@ int amdgpu_gmc_pdb0_alloc(struct amdgpu_device *adev)
 		AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = NULL;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
+
 	r = amdgpu_bo_create(adev, &bp, &adev->gmc.pdb0_bo);
 	if (r)
 		return r;

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

@@ -248,6 +248,7 @@ int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
 	bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = NULL;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
 	if (!*bo_ptr) {
 		r = amdgpu_bo_create(adev, &bp, bo_ptr);
@@ -543,9 +544,10 @@ static int amdgpu_bo_do_create(struct amdgpu_device *adev,
 	if (!amdgpu_bo_validate_size(adev, size, bp->domain))
 		return -ENOMEM;
 
-	*bo_ptr = NULL;
+	BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo));
 
-	bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
+	*bo_ptr = NULL;
+	bo = kzalloc(bp->bo_ptr_size, GFP_KERNEL);
 	if (bo == NULL)
 		return -ENOMEM;
 	drm_gem_private_object_init(adev_to_drm(adev), &bo->tbo.base, size);
@@ -635,6 +637,7 @@ static int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
 		AMDGPU_GEM_CREATE_SHADOW;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = bo->tbo.base.resv;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
 	r = amdgpu_bo_do_create(adev, &bp, &bo->shadow);
 	if (!r) {
@@ -669,6 +672,7 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
 	int r;
 
 	bp->flags = bp->flags & ~AMDGPU_GEM_CREATE_SHADOW;
+
 	r = amdgpu_bo_do_create(adev, bp, bo_ptr);
 	if (r)
 		return r;

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

@@ -40,6 +40,7 @@
 struct amdgpu_bo_param {
 	unsigned long			size;
 	int				byte_align;
+	u32				bo_ptr_size;
 	u32				domain;
 	u32				preferred_domain;
 	u64				flags;

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

@@ -62,6 +62,7 @@ static void amdgpu_do_test_moves(struct amdgpu_device *adev)
 	bp.flags = 0;
 	bp.type = ttm_bo_type_kernel;
 	bp.resv = NULL;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
 	r = amdgpu_bo_create(adev, &bp, &vram_obj);
 	if (r) {

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

@@ -869,6 +869,7 @@ static void amdgpu_vm_bo_param(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 	bp->domain = amdgpu_bo_get_preferred_pin_domain(adev, bp->domain);
 	bp->flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 		AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+	bp->bo_ptr_size = sizeof(struct amdgpu_bo);
 	if (vm->use_cpu_for_update)
 		bp->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 	else if (!vm->root.base.bo || vm->root.base.bo->shadow)