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#ifndef _GPXE_IB_PACKET_H
#define _GPXE_IB_PACKET_H
/** @file
*
* Infiniband packet format
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
struct ib_device;
struct ib_queue_pair;
struct ib_address_vector;
struct io_buffer;
/** Half of an Infiniband Global Identifier */
struct ib_gid_half {
union {
uint8_t bytes[8];
uint16_t words[4];
uint32_t dwords[2];
} u;
};
/** 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,
};
/** 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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