| #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 */ |