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root/include/rdma/ib_pack.h

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DEFINITIONS

This source file includes following definitions.
  1. IB_OPCODE
  2. IB_OPCODE
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/*
 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef IB_PACK_H
#define IB_PACK_H

#include <rdma/ib_verbs.h>

enum {
        IB_LRH_BYTES  = 8,
        IB_GRH_BYTES  = 40,
        IB_BTH_BYTES  = 12,
        IB_DETH_BYTES = 8
};

struct ib_field {
        size_t struct_offset_bytes;
        size_t struct_size_bytes;
        int    offset_words;
        int    offset_bits;
        int    size_bits;
        char  *field_name;
};

#define RESERVED \
        .field_name          = "reserved"

/*
 * This macro cleans up the definitions of constants for BTH opcodes.
 * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY,
 * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives
 * the correct value.
 *
 * In short, user code should use the constants defined using the
 * macro rather than worrying about adding together other constants.
*/
#define IB_OPCODE(transport, op) \
        IB_OPCODE_ ## transport ## _ ## op = \
                IB_OPCODE_ ## transport + IB_OPCODE_ ## op

enum {
        /* transport types -- just used to define real constants */
        IB_OPCODE_RC                                = 0x00,
        IB_OPCODE_UC                                = 0x20,
        IB_OPCODE_RD                                = 0x40,
        IB_OPCODE_UD                                = 0x60,

        /* operations -- just used to define real constants */
        IB_OPCODE_SEND_FIRST                        = 0x00,
        IB_OPCODE_SEND_MIDDLE                       = 0x01,
        IB_OPCODE_SEND_LAST                         = 0x02,
        IB_OPCODE_SEND_LAST_WITH_IMMEDIATE          = 0x03,
        IB_OPCODE_SEND_ONLY                         = 0x04,
        IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE          = 0x05,
        IB_OPCODE_RDMA_WRITE_FIRST                  = 0x06,
        IB_OPCODE_RDMA_WRITE_MIDDLE                 = 0x07,
        IB_OPCODE_RDMA_WRITE_LAST                   = 0x08,
        IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE    = 0x09,
        IB_OPCODE_RDMA_WRITE_ONLY                   = 0x0a,
        IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE    = 0x0b,
        IB_OPCODE_RDMA_READ_REQUEST                 = 0x0c,
        IB_OPCODE_RDMA_READ_RESPONSE_FIRST          = 0x0d,
        IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE         = 0x0e,
        IB_OPCODE_RDMA_READ_RESPONSE_LAST           = 0x0f,
        IB_OPCODE_RDMA_READ_RESPONSE_ONLY           = 0x10,
        IB_OPCODE_ACKNOWLEDGE                       = 0x11,
        IB_OPCODE_ATOMIC_ACKNOWLEDGE                = 0x12,
        IB_OPCODE_COMPARE_SWAP                      = 0x13,
        IB_OPCODE_FETCH_ADD                         = 0x14,

        /* real constants follow -- see comment about above IB_OPCODE()
           macro for more details */

        /* RC */
        IB_OPCODE(RC, SEND_FIRST),
        IB_OPCODE(RC, SEND_MIDDLE),
        IB_OPCODE(RC, SEND_LAST),
        IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
        IB_OPCODE(RC, SEND_ONLY),
        IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
        IB_OPCODE(RC, RDMA_WRITE_FIRST),
        IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
        IB_OPCODE(RC, RDMA_WRITE_LAST),
        IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
        IB_OPCODE(RC, RDMA_WRITE_ONLY),
        IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
        IB_OPCODE(RC, RDMA_READ_REQUEST),
        IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
        IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
        IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
        IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
        IB_OPCODE(RC, ACKNOWLEDGE),
        IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
        IB_OPCODE(RC, COMPARE_SWAP),
        IB_OPCODE(RC, FETCH_ADD),

        /* UC */
        IB_OPCODE(UC, SEND_FIRST),
        IB_OPCODE(UC, SEND_MIDDLE),
        IB_OPCODE(UC, SEND_LAST),
        IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
        IB_OPCODE(UC, SEND_ONLY),
        IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
        IB_OPCODE(UC, RDMA_WRITE_FIRST),
        IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
        IB_OPCODE(UC, RDMA_WRITE_LAST),
        IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
        IB_OPCODE(UC, RDMA_WRITE_ONLY),
        IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),

        /* RD */
        IB_OPCODE(RD, SEND_FIRST),
        IB_OPCODE(RD, SEND_MIDDLE),
        IB_OPCODE(RD, SEND_LAST),
        IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
        IB_OPCODE(RD, SEND_ONLY),
        IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
        IB_OPCODE(RD, RDMA_WRITE_FIRST),
        IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
        IB_OPCODE(RD, RDMA_WRITE_LAST),
        IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
        IB_OPCODE(RD, RDMA_WRITE_ONLY),
        IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
        IB_OPCODE(RD, RDMA_READ_REQUEST),
        IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
        IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
        IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
        IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
        IB_OPCODE(RD, ACKNOWLEDGE),
        IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
        IB_OPCODE(RD, COMPARE_SWAP),
        IB_OPCODE(RD, FETCH_ADD),

        /* UD */
        IB_OPCODE(UD, SEND_ONLY),
        IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
};

enum {
        IB_LNH_RAW        = 0,
        IB_LNH_IP         = 1,
        IB_LNH_IBA_LOCAL  = 2,
        IB_LNH_IBA_GLOBAL = 3
};

struct ib_unpacked_lrh {
        u8        virtual_lane;
        u8        link_version;
        u8        service_level;
        u8        link_next_header;
        __be16    destination_lid;
        __be16    packet_length;
        __be16    source_lid;
};

struct ib_unpacked_grh {
        u8           ip_version;
        u8           traffic_class;
        __be32       flow_label;
        __be16       payload_length;
        u8           next_header;
        u8           hop_limit;
        union ib_gid source_gid;
        union ib_gid destination_gid;
};

struct ib_unpacked_bth {
        u8           opcode;
        u8           solicited_event;
        u8           mig_req;
        u8           pad_count;
        u8           transport_header_version;
        __be16       pkey;
        __be32       destination_qpn;
        u8           ack_req;
        __be32       psn;
};

struct ib_unpacked_deth {
        __be32       qkey;
        __be32       source_qpn;
};

struct ib_ud_header {
        struct ib_unpacked_lrh  lrh;
        int                     grh_present;
        struct ib_unpacked_grh  grh;
        struct ib_unpacked_bth  bth;
        struct ib_unpacked_deth deth;
        int                     immediate_present;
        __be32                  immediate_data;
};

void ib_pack(const struct ib_field        *desc,
             int                           desc_len,
             void                         *structure,
             void                         *buf);

void ib_unpack(const struct ib_field        *desc,
               int                           desc_len,
               void                         *buf,
               void                         *structure);

void ib_ud_header_init(int                 payload_bytes,
                       int                 grh_present,
                       struct ib_ud_header *header);

int ib_ud_header_pack(struct ib_ud_header *header,
                      void                *buf);

int ib_ud_header_unpack(void                *buf,
                        struct ib_ud_header *header);

#endif /* IB_PACK_H */

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