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https://github.com/ipxe/ipxe
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663904a7bc
Not all Infiniband cards have embedded subnet management agents. Split out the code that communicates with such an embedded SMA into a separate ib_smc.c file, and have drivers call ib_smc_update() explicitly when they suspect that the answers given by the embedded SMA may have changed.
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
#ifndef _GPXE_IB_PACKET_H
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#define _GPXE_IB_PACKET_H
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/** @file
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*
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* Infiniband packet format
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*
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*/
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/** Half of an Infiniband Global Identifier */
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struct ib_gid_half {
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uint8_t bytes[8];
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};
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/** An Infiniband Global Identifier */
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struct ib_gid {
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union {
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uint8_t bytes[16];
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uint16_t words[8];
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uint32_t dwords[4];
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struct ib_gid_half half[2];
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} u;
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};
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/** An Infiniband Local Route Header */
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struct ib_local_route_header {
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/** Virtual lane and link version */
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uint8_t vl__lver;
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/** Service level and next link header */
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uint8_t sl__lnh;
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/** Destination LID */
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uint16_t dlid;
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/** Packet length */
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uint16_t length;
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/** Source LID */
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uint16_t slid;
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} __attribute__ (( packed ));
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/** Infiniband virtual lanes */
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enum ib_vl {
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IB_VL_DEFAULT = 0,
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IB_VL_SMP = 15,
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};
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/** An Infiniband Link Next Header value */
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enum ib_lnh {
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IB_LNH_RAW = 0,
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IB_LNH_IPv6 = 1,
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IB_LNH_BTH = 2,
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IB_LNH_GRH = 3
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};
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/** Default Infiniband LID */
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#define IB_LID_NONE 0xffff
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/** An Infiniband Global Route Header */
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struct ib_global_route_header {
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/** IP version, traffic class, and flow label
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*
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* 4 bits : Version of the GRH
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* 8 bits : Traffic class
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* 20 bits : Flow label
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*/
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uint32_t ipver__tclass__flowlabel;
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/** Payload length */
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uint16_t paylen;
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/** Next header */
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uint8_t nxthdr;
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/** Hop limit */
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uint8_t hoplmt;
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/** Source GID */
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struct ib_gid sgid;
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/** Destiniation GID */
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struct ib_gid dgid;
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} __attribute__ (( packed ));
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#define IB_GRH_IPVER_IPv6 0x06
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#define IB_GRH_NXTHDR_IBA 0x1b
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#define IB_GRH_HOPLMT_MAX 0xff
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/** An Infiniband Base Transport Header */
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struct ib_base_transport_header {
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/** Opcode */
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uint8_t opcode;
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/** Transport header version, pad count, migration and solicitation */
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uint8_t se__m__padcnt__tver;
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/** Partition key */
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uint16_t pkey;
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/** Destination queue pair */
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uint32_t dest_qp;
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/** Packet sequence number and acknowledge request */
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uint32_t ack__psn;
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} __attribute__ (( packed ));
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/** An Infiniband BTH opcode */
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enum ib_bth_opcode {
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BTH_OPCODE_UD_SEND = 0x64,
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};
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/** Default Infiniband partition key */
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#define IB_PKEY_NONE 0xffff
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/** Subnet management queue pair number */
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#define IB_QPN_SMP 0
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/** An Infiniband Datagram Extended Transport Header */
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struct ib_datagram_extended_transport_header {
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/** Queue key */
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uint32_t qkey;
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/** Source queue pair */
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uint32_t src_qp;
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} __attribute__ (( packed ));
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#endif /* _GPXE_IB_PACKET_H */
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