drivers/scsi/ibmvscsi/srp.h

   1 /*****************************************************************************/
   2 /* srp.h -- SCSI RDMA Protocol definitions                                   */
   3 /*                                                                           */
   4 /* Written By: Colin Devilbis, IBM Corporation                               */
   5 /*                                                                           */
   6 /* Copyright (C) 2003 IBM Corporation                                        */
   7 /*                                                                           */
   8 /* This program is free software; you can redistribute it and/or modify      */
   9 /* it under the terms of the GNU General Public License as published by      */
  10 /* the Free Software Foundation; either version 2 of the License, or         */
  11 /* (at your option) any later version.                                       */
  12 /*                                                                           */
  13 /* This program is distributed in the hope that it will be useful,           */
  14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of            */
  15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             */
  16 /* GNU General Public License for more details.                              */
  17 /*                                                                           */
  18 /* You should have received a copy of the GNU General Public License         */
  19 /* along with this program; if not, write to the Free Software               */
  20 /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  21 /*                                                                           */
  22 /*                                                                           */
  23 /* This file contains structures and definitions for the SCSI RDMA Protocol  */
  24 /* (SRP) as defined in the T10 standard available at www.t10.org.  This      */
  25 /* file was based on the 16a version of the standard                         */
  26 /*                                                                           */
  27 /*****************************************************************************/
  28 #ifndef SRP_H
  29 #define SRP_H
  30
  31 #define SRP_VERSION "16.a"
  32
  33 #define PACKED __attribute__((packed))
  34
  35 enum srp_types {
  36         SRP_LOGIN_REQ_TYPE = 0x00,
  37         SRP_LOGIN_RSP_TYPE = 0xC0,
  38         SRP_LOGIN_REJ_TYPE = 0xC2,
  39         SRP_I_LOGOUT_TYPE = 0x03,
  40         SRP_T_LOGOUT_TYPE = 0x80,
  41         SRP_TSK_MGMT_TYPE = 0x01,
  42         SRP_CMD_TYPE = 0x02,
  43         SRP_RSP_TYPE = 0xC1,
  44         SRP_CRED_REQ_TYPE = 0x81,
  45         SRP_CRED_RSP_TYPE = 0x41,
  46         SRP_AER_REQ_TYPE = 0x82,
  47         SRP_AER_RSP_TYPE = 0x42
  48 };
  49
  50 enum srp_descriptor_formats {
  51         SRP_NO_BUFFER = 0x00,
  52         SRP_DIRECT_BUFFER = 0x01,
  53         SRP_INDIRECT_BUFFER = 0x02
  54 };
  55
  56 struct memory_descriptor {
  57         u64 virtual_address;
  58         u32 memory_handle;
  59         u32 length;
  60 };
  61
  62 struct indirect_descriptor {
  63         struct memory_descriptor head;
  64         u32 total_length;
  65         struct memory_descriptor list[1] PACKED;
  66 };
  67
  68 struct srp_generic {
  69         u8 type;
  70         u8 reserved1[7];
  71         u64 tag;
  72 };
  73
  74 struct srp_login_req {
  75         u8 type;
  76         u8 reserved1[7];
  77         u64 tag;
  78         u32 max_requested_initiator_to_target_iulen;
  79         u32 reserved2;
  80         u16 required_buffer_formats;
  81         u8 reserved3:6;
  82         u8 multi_channel_action:2;
  83         u8 reserved4;
  84         u32 reserved5;
  85         u8 initiator_port_identifier[16];
  86         u8 target_port_identifier[16];
  87 };
  88
  89 struct srp_login_rsp {
  90         u8 type;
  91         u8 reserved1[3];
  92         u32 request_limit_delta;
  93         u64 tag;
  94         u32 max_initiator_to_target_iulen;
  95         u32 max_target_to_initiator_iulen;
  96         u16 supported_buffer_formats;
  97         u8 reserved2:6;
  98         u8 multi_channel_result:2;
  99         u8 reserved3;
 100         u8 reserved4[24];
 101 };
 102
 103 struct srp_login_rej {
 104         u8 type;
 105         u8 reserved1[3];
 106         u32 reason;
 107         u64 tag;
 108         u64 reserved2;
 109         u16 supported_buffer_formats;
 110         u8 reserved3[6];
 111 };
 112
 113 struct srp_i_logout {
 114         u8 type;
 115         u8 reserved1[7];
 116         u64 tag;
 117 };
 118
 119 struct srp_t_logout {
 120         u8 type;
 121         u8 reserved1[3];
 122         u32 reason;
 123         u64 tag;
 124 };
 125
 126 struct srp_tsk_mgmt {
 127         u8 type;
 128         u8 reserved1[7];
 129         u64 tag;
 130         u32 reserved2;
 131         u64 lun PACKED;
 132         u8 reserved3;
 133         u8 reserved4;
 134         u8 task_mgmt_flags;
 135         u8 reserved5;
 136         u64 managed_task_tag;
 137         u64 reserved6;
 138 };
 139
 140 struct srp_cmd {
 141         u8 type;
 142         u32 reserved1 PACKED;
 143         u8 data_out_format:4;
 144         u8 data_in_format:4;
 145         u8 data_out_count;
 146         u8 data_in_count;
 147         u64 tag;
 148         u32 reserved2;
 149         u64 lun PACKED;
 150         u8 reserved3;
 151         u8 reserved4:5;
 152         u8 task_attribute:3;
 153         u8 reserved5;
 154         u8 additional_cdb_len;
 155         u8 cdb[16];
 156         u8 additional_data[0x100 - 0x30];
 157 };
 158
 159 struct srp_rsp {
 160         u8 type;
 161         u8 reserved1[3];
 162         u32 request_limit_delta;
 163         u64 tag;
 164         u16 reserved2;
 165         u8 reserved3:2;
 166         u8 diunder:1;
 167         u8 diover:1;
 168         u8 dounder:1;
 169         u8 doover:1;
 170         u8 snsvalid:1;
 171         u8 rspvalid:1;
 172         u8 status;
 173         u32 data_in_residual_count;
 174         u32 data_out_residual_count;
 175         u32 sense_data_list_length;
 176         u32 response_data_list_length;
 177         u8 sense_and_response_data[18];
 178 };
 179
 180 struct srp_cred_req {
 181         u8 type;
 182         u8 reserved1[3];
 183         u32 request_limit_delta;
 184         u64 tag;
 185 };
 186
 187 struct srp_cred_rsp {
 188         u8 type;
 189         u8 reserved1[7];
 190         u64 tag;
 191 };
 192
 193 struct srp_aer_req {
 194         u8 type;
 195         u8 reserved1[3];
 196         u32 request_limit_delta;
 197         u64 tag;
 198         u32 reserved2;
 199         u64 lun;
 200         u32 sense_data_list_length;
 201         u32 reserved3;
 202         u8 sense_data[20];
 203 };
 204
 205 struct srp_aer_rsp {
 206         u8 type;
 207         u8 reserved1[7];
 208         u64 tag;
 209 };
 210
 211 union srp_iu {
 212         struct srp_generic generic;
 213         struct srp_login_req login_req;
 214         struct srp_login_rsp login_rsp;
 215         struct srp_login_rej login_rej;
 216         struct srp_i_logout i_logout;
 217         struct srp_t_logout t_logout;
 218         struct srp_tsk_mgmt tsk_mgmt;
 219         struct srp_cmd cmd;
 220         struct srp_rsp rsp;
 221         struct srp_cred_req cred_req;
 222         struct srp_cred_rsp cred_rsp;
 223         struct srp_aer_req aer_req;
 224         struct srp_aer_rsp aer_rsp;
 225 };
 226
 227 #endif