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  */
  54 struct 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  */
  69 struct 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 */