drivers/infiniband/ulp/srpt/ib_dm_mad.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/ulp/srpt/ib_dm_mad.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/ulp/srpt/ib_dm_mad.h
Extension
.h
Size
4139 bytes
Lines
140
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 ib_dm_hdr {
	u8 reserved[28];
};

/*
 * Structure of management datagram sent by the SRP target implementation.
 * Contains a management datagram header, reliable multi-packet transaction
 * protocol (RMPP) header and ib_dm_hdr. Notes:
 * - The SRP target implementation does not use RMPP or ib_dm_hdr when sending
 *   management datagrams.
 * - The header size must be exactly 64 bytes (IB_MGMT_DEVICE_HDR), since this
 *   is the header size that is passed to ib_create_send_mad() in ib_srpt.c.
 * - The maximum supported size for a management datagram when not using RMPP
 *   is 256 bytes -- 64 bytes header and 192 (IB_MGMT_DEVICE_DATA) bytes data.
 */
struct ib_dm_mad {
	struct ib_mad_hdr mad_hdr;
	struct ib_rmpp_hdr rmpp_hdr;
	struct ib_dm_hdr dm_hdr;
	u8 data[IB_MGMT_DEVICE_DATA];
};

/*
 * IOUnitInfo as defined in section 16.3.3.3 IOUnitInfo of the InfiniBand
 * Architecture Specification.
 */
struct ib_dm_iou_info {
	__be16 change_id;
	u8 max_controllers;
	u8 op_rom;
	u8 controller_list[128];
};

/*
 * IOControllerprofile as defined in section 16.3.3.4 IOControllerProfile of
 * the InfiniBand Architecture Specification.
 */
struct ib_dm_ioc_profile {
	__be64 guid;
	__be32 vendor_id;
	__be32 device_id;
	__be16 device_version;
	__be16 reserved1;
	__be32 subsys_vendor_id;
	__be32 subsys_device_id;
	__be16 io_class;
	__be16 io_subclass;
	__be16 protocol;
	__be16 protocol_version;
	__be16 service_conn;
	__be16 initiators_supported;
	__be16 send_queue_depth;
	u8 reserved2;
	u8 rdma_read_depth;
	__be32 send_size;
	__be32 rdma_size;
	u8 op_cap_mask;
	u8 svc_cap_mask;
	u8 num_svc_entries;
	u8 reserved3[9];
	u8 id_string[64];
};

struct ib_dm_svc_entry {
	u8 name[40];
	__be64 id;
};

/*
 * See also section 16.3.3.5 ServiceEntries in the InfiniBand Architecture
 * Specification. See also section B.7, table B.8 in the T10 SRP r16a document.
 */
struct ib_dm_svc_entries {
	struct ib_dm_svc_entry service_entries[4];
};

#endif

Annotation

Implementation Notes