LXR linux/include/scsi/iser.h

   1/*
   2 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32#ifndef ISCSI_ISER_H
  33#define ISCSI_ISER_H
  34
  35#define ISER_ZBVA_NOT_SUP               0x80
  36#define ISER_SEND_W_INV_NOT_SUP         0x40
  37#define ISERT_ZBVA_NOT_USED             0x80
  38#define ISERT_SEND_W_INV_NOT_USED       0x40
  39
  40#define ISCSI_CTRL      0x10
  41#define ISER_HELLO      0x20
  42#define ISER_HELLORPLY  0x30
  43
  44#define ISER_VER        0x10
  45#define ISER_WSV        0x08
  46#define ISER_RSV        0x04
  47
  48/**
  49 * struct iser_cm_hdr - iSER CM header (from iSER Annex A12)
  50 *
  51 * @flags:        flags support (zbva, send_w_inv)
  52 * @rsvd:         reserved
  53 */
  54struct iser_cm_hdr {
  55        u8      flags;
  56        u8      rsvd[3];
  57} __packed;
  58
  59/**
  60 * struct iser_ctrl - iSER header of iSCSI control PDU
  61 *
  62 * @flags:        opcode and read/write valid bits
  63 * @rsvd:         reserved
  64 * @write_stag:   write rkey
  65 * @write_va:     write virtual address
  66 * @reaf_stag:    read rkey
  67 * @read_va:      read virtual address
  68 */
  69struct iser_ctrl {
  70        u8      flags;
  71        u8      rsvd[3];
  72        __be32  write_stag;
  73        __be64  write_va;
  74        __be32  read_stag;
  75        __be64  read_va;
  76} __packed;
  77
  78#endif /* ISCSI_ISER_H */
  79