C++ (Cpp) ttm_eu_reserve_buffers Examples

Example #1

int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm)
{
	int r;
	struct amdgpu_bo_va *bo_va;
	struct ww_acquire_ctx ticket;
	struct list_head list;
	struct amdgpu_bo_list_entry pd;
	struct ttm_validate_buffer csa_tv;

	INIT_LIST_HEAD(&list);
	INIT_LIST_HEAD(&csa_tv.head);
	csa_tv.bo = &adev->virt.csa_obj->tbo;
	csa_tv.shared = true;

	list_add(&csa_tv.head, &list);
	amdgpu_vm_get_pd_bo(vm, &list, &pd);

	r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
	if (r) {
		DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
		return r;
	}

	bo_va = amdgpu_vm_bo_add(adev, vm, adev->virt.csa_obj);
	if (!bo_va) {
		ttm_eu_backoff_reservation(&ticket, &list);
		DRM_ERROR("failed to create bo_va for static CSA\n");
		return -ENOMEM;
	}

	r = amdgpu_vm_alloc_pts(adev, bo_va->vm, AMDGPU_CSA_VADDR,
				   AMDGPU_CSA_SIZE);
	if (r) {
		DRM_ERROR("failed to allocate pts for static CSA, err=%d\n", r);
		amdgpu_vm_bo_rmv(adev, bo_va);
		ttm_eu_backoff_reservation(&ticket, &list);
		return r;
	}

	r = amdgpu_vm_bo_map(adev, bo_va, AMDGPU_CSA_VADDR, 0,AMDGPU_CSA_SIZE,
						AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
						AMDGPU_PTE_EXECUTABLE);

	if (r) {
		DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
		amdgpu_vm_bo_rmv(adev, bo_va);
		ttm_eu_backoff_reservation(&ticket, &list);
		return r;
	}

	vm->csa_bo_va = bo_va;
	ttm_eu_backoff_reservation(&ticket, &list);
	return 0;
}

Example #2

File: virtgpu_ioctl.c Project: 020gzh/linux

static int virtio_gpu_object_list_validate(struct ww_acquire_ctx *ticket,
					   struct list_head *head)
{
	struct ttm_validate_buffer *buf;
	struct ttm_buffer_object *bo;
	struct virtio_gpu_object *qobj;
	int ret;

	ret = ttm_eu_reserve_buffers(ticket, head, true, NULL);
	if (ret != 0)
		return ret;

	list_for_each_entry(buf, head, head) {
		bo = buf->bo;
		qobj = container_of(bo, struct virtio_gpu_object, tbo);
		ret = ttm_bo_validate(bo, &qobj->placement, false, false);
		if (ret) {
			ttm_eu_backoff_reservation(ticket, head);
			return ret;
		}
	}