drivers/infiniband/core/rdma_core.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/core/rdma_core.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/core/rdma_core.h
Extension
.h
Size
6822 bytes
Lines
200
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct uverbs_api_ioctl_method {
	int(__rcu *handler)(struct uverbs_attr_bundle *attrs);
	DECLARE_BITMAP(attr_mandatory, UVERBS_API_ATTR_BKEY_LEN);
	u16 bundle_size;
	u8 use_stack:1;
	u8 driver_method:1;
	u8 disabled:1;
	u8 has_udata:1;
	u8 key_bitmap_len;
	u8 destroy_bkey;
};

struct uverbs_api_write_method {
	int (*handler)(struct uverbs_attr_bundle *attrs);
	u8 disabled:1;
	u8 is_ex:1;
	u8 has_udata:1;
	u8 has_resp:1;
	u8 req_size;
	u8 resp_size;
};

struct uverbs_api_attr {
	struct uverbs_attr_spec spec;
};

struct uverbs_api {
	/* radix tree contains struct uverbs_api_* pointers */
	struct radix_tree_root radix;
	enum rdma_driver_id driver_id;

	unsigned int num_write;
	unsigned int num_write_ex;
	struct uverbs_api_write_method notsupp_method;
	const struct uverbs_api_write_method **write_methods;
	const struct uverbs_api_write_method **write_ex_methods;
};

/*
 * Get an uverbs_api_object that corresponds to the given object_id.
 * Note:
 * -ENOMSG means that any object is allowed to match during lookup.
 */
static inline const struct uverbs_api_object *
uapi_get_object(struct uverbs_api *uapi, u16 object_id)
{
	const struct uverbs_api_object *res;

	if (object_id == UVERBS_IDR_ANY_OBJECT)
		return ERR_PTR(-ENOMSG);

	res = radix_tree_lookup(&uapi->radix, uapi_key_obj(object_id));
	if (!res)
		return ERR_PTR(-ENOENT);

	return res;
}

char *uapi_key_format(char *S, unsigned int key);
struct uverbs_api *uverbs_alloc_api(struct ib_device *ibdev);
void uverbs_disassociate_api_pre(struct ib_uverbs_device *uverbs_dev);
void uverbs_disassociate_api(struct uverbs_api *uapi);
void uverbs_destroy_api(struct uverbs_api *uapi);
void uapi_compute_bundle_size(struct uverbs_api_ioctl_method *method_elm,
			      unsigned int num_attrs);
void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile);

extern const struct uapi_definition uverbs_def_obj_async_fd[];
extern const struct uapi_definition uverbs_def_obj_counters[];
extern const struct uapi_definition uverbs_def_obj_cq[];
extern const struct uapi_definition uverbs_def_obj_device[];
extern const struct uapi_definition uverbs_def_obj_dm[];
extern const struct uapi_definition uverbs_def_obj_dmabuf[];
extern const struct uapi_definition uverbs_def_obj_dmah[];
extern const struct uapi_definition uverbs_def_obj_flow_action[];
extern const struct uapi_definition uverbs_def_obj_intf[];
extern const struct uapi_definition uverbs_def_obj_mr[];
extern const struct uapi_definition uverbs_def_obj_qp[];
extern const struct uapi_definition uverbs_def_obj_srq[];
extern const struct uapi_definition uverbs_def_obj_wq[];
extern const struct uapi_definition uverbs_def_write_intf[];

static inline const struct uverbs_api_write_method *
uapi_get_method(const struct uverbs_api *uapi, u32 command)
{
	u32 cmd_idx = command & IB_USER_VERBS_CMD_COMMAND_MASK;

	if (command & ~(u32)(IB_USER_VERBS_CMD_FLAG_EXTENDED |
			     IB_USER_VERBS_CMD_COMMAND_MASK))
		return ERR_PTR(-EINVAL);

Annotation

Implementation Notes