include/uapi/rdma/hfi/hfi1_user.h

Source file repositories/reference/linux-study-clean/include/uapi/rdma/hfi/hfi1_user.h

File Facts

System
Linux kernel
Corpus path
include/uapi/rdma/hfi/hfi1_user.h
Extension
.h
Size
9298 bytes
Lines
269
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hfi1_sdma_comp_entry {
	__u32 status;
	__u32 errcode;
};

/*
 * Device status and notifications from driver to user-space.
 */
struct hfi1_status {
	__aligned_u64 dev;      /* device/hw status bits */
	__aligned_u64 port;     /* port state and status bits */
	char freezemsg[];
};

enum sdma_req_opcode {
	EXPECTED = 0,
	EAGER
};

#define HFI1_SDMA_REQ_VERSION_MASK 0xF
#define HFI1_SDMA_REQ_VERSION_SHIFT 0x0
#define HFI1_SDMA_REQ_OPCODE_MASK 0xF
#define HFI1_SDMA_REQ_OPCODE_SHIFT 0x4
#define HFI1_SDMA_REQ_IOVCNT_MASK 0xFF
#define HFI1_SDMA_REQ_IOVCNT_SHIFT 0x8

struct sdma_req_info {
	/*
	 * bits 0-3 - version (currently unused)
	 * bits 4-7 - opcode (enum sdma_req_opcode)
	 * bits 8-15 - io vector count
	 */
	__u16 ctrl;
	/*
	 * Number of fragments contained in this request.
	 * User-space has already computed how many
	 * fragment-sized packet the user buffer will be
	 * split into.
	 */
	__u16 npkts;
	/*
	 * Size of each fragment the user buffer will be
	 * split into.
	 */
	__u16 fragsize;
	/*
	 * Index of the slot in the SDMA completion ring
	 * this request should be using. User-space is
	 * in charge of managing its own ring.
	 */
	__u16 comp_idx;
} __attribute__((__packed__));

/*
 * SW KDETH header.
 * swdata is SW defined portion.
 */
struct hfi1_kdeth_header {
	__le32 ver_tid_offset;
	__le16 jkey;
	__le16 hcrc;
	__le32 swdata[7];
}  __attribute__((__packed__));

/*
 * Structure describing the headers that User space uses. The
 * structure above is a subset of this one.
 */
struct hfi1_pkt_header {
	__le16 pbc[4];
	__be16 lrh[4];
	__be32 bth[3];
	struct hfi1_kdeth_header kdeth;
}  __attribute__((__packed__));


/*
 * The list of usermode accessible registers.
 */
enum hfi1_ureg {
	/* (RO)  DMA RcvHdr to be used next. */
	ur_rcvhdrtail = 0,
	/* (RW)  RcvHdr entry to be processed next by host. */
	ur_rcvhdrhead = 1,
	/* (RO)  Index of next Eager index to use. */
	ur_rcvegrindextail = 2,
	/* (RW)  Eager TID to be processed next */
	ur_rcvegrindexhead = 3,
	/* (RO)  Receive Eager Offset Tail */
	ur_rcvegroffsettail = 4,

Annotation

Implementation Notes