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- #ifndef _GPXE_IB_PACKET_H
- #define _GPXE_IB_PACKET_H
-
- /** @file
- *
- * Infiniband packet format
- *
- */
-
- struct ib_device;
- struct ib_queue_pair;
- struct ib_address_vector;
- struct io_buffer;
-
- /** Half of an Infiniband Global Identifier */
- struct ib_gid_half {
- uint8_t bytes[8];
- };
-
- /** An Infiniband Global Identifier */
- struct ib_gid {
- union {
- uint8_t bytes[16];
- uint16_t words[8];
- uint32_t dwords[4];
- struct ib_gid_half half[2];
- } u;
- };
-
- /** An Infiniband Local Route Header */
- struct ib_local_route_header {
- /** Virtual lane and link version */
- uint8_t vl__lver;
- /** Service level and next link header */
- uint8_t sl__lnh;
- /** Destination LID */
- uint16_t dlid;
- /** Packet length */
- uint16_t length;
- /** Source LID */
- uint16_t slid;
- } __attribute__ (( packed ));
-
- /** Infiniband virtual lanes */
- enum ib_vl {
- IB_VL_DEFAULT = 0,
- IB_VL_SMP = 15,
- };
-
- /** An Infiniband Link Next Header value */
- enum ib_lnh {
- IB_LNH_RAW = 0,
- IB_LNH_IPv6 = 1,
- IB_LNH_BTH = 2,
- IB_LNH_GRH = 3
- };
-
- /** Default Infiniband LID */
- #define IB_LID_NONE 0xffff
-
- /** Test for multicast LID */
- #define IB_LID_MULTICAST( lid ) ( ( (lid) >= 0xc000 ) && ( (lid) <= 0xfffe ) )
-
- /** An Infiniband Global Route Header */
- struct ib_global_route_header {
- /** IP version, traffic class, and flow label
- *
- * 4 bits : Version of the GRH
- * 8 bits : Traffic class
- * 20 bits : Flow label
- */
- uint32_t ipver__tclass__flowlabel;
- /** Payload length */
- uint16_t paylen;
- /** Next header */
- uint8_t nxthdr;
- /** Hop limit */
- uint8_t hoplmt;
- /** Source GID */
- struct ib_gid sgid;
- /** Destiniation GID */
- struct ib_gid dgid;
- } __attribute__ (( packed ));
-
- #define IB_GRH_IPVER_IPv6 0x06
- #define IB_GRH_NXTHDR_IBA 0x1b
-
- /** An Infiniband Base Transport Header */
- struct ib_base_transport_header {
- /** Opcode */
- uint8_t opcode;
- /** Transport header version, pad count, migration and solicitation */
- uint8_t se__m__padcnt__tver;
- /** Partition key */
- uint16_t pkey;
- /** Destination queue pair */
- uint32_t dest_qp;
- /** Packet sequence number and acknowledge request */
- uint32_t ack__psn;
- } __attribute__ (( packed ));
-
- /** An Infiniband BTH opcode */
- enum ib_bth_opcode {
- BTH_OPCODE_UD_SEND = 0x64,
- };
-
- /** Default Infiniband partition key */
- #define IB_PKEY_NONE 0xffff
-
- /** Subnet management queue pair number */
- #define IB_QPN_SMP 0
-
- /** An Infiniband Datagram Extended Transport Header */
- struct ib_datagram_extended_transport_header {
- /** Queue key */
- uint32_t qkey;
- /** Source queue pair */
- uint32_t src_qp;
- } __attribute__ (( packed ));
-
- /** All known IB header formats */
- union ib_headers {
- struct ib_local_route_header lrh;
- struct {
- struct ib_local_route_header lrh;
- struct ib_global_route_header grh;
- struct ib_base_transport_header bth;
- struct ib_datagram_extended_transport_header deth;
- } __attribute__ (( packed )) lrh__grh__bth__deth;
- struct {
- struct ib_local_route_header lrh;
- struct ib_base_transport_header bth;
- struct ib_datagram_extended_transport_header deth;
- } __attribute__ (( packed )) lrh__bth__deth;
- } __attribute__ (( packed ));
-
- /** Maximum size required for IB headers */
- #define IB_MAX_HEADER_SIZE sizeof ( union ib_headers )
-
- extern int ib_push ( struct ib_device *ibdev, struct io_buffer *iobuf,
- struct ib_queue_pair *qp, size_t payload_len,
- const struct ib_address_vector *av );
- extern int ib_pull ( struct ib_device *ibdev, struct io_buffer *iobuf,
- struct ib_queue_pair **qp, size_t *payload_len,
- struct ib_address_vector *av );
-
- #endif /* _GPXE_IB_PACKET_H */
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