drivers/scsi/ibmvscsi/viosrp.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 IBM RPA (RS/6000        */
  24 /* platform architecture) implementation of the SRP (SCSI RDMA Protocol)     */
  25 /* standard.  SRP is used on IBM iSeries and pSeries platforms to send SCSI  */
  26 /* commands between logical partitions.                                      */
  27 /*                                                                           */
  28 /* SRP Information Units (IUs) are sent on a "Command/Response Queue" (CRQ)  */
  29 /* between partitions.  The definitions in this file are architected,        */
  30 /* and cannot be changed without breaking compatibility with other versions  */
  31 /* of Linux and other operating systems (AIX, OS/400) that talk this protocol*/
  32 /* between logical partitions                                                */
  33 /*****************************************************************************/
  34 #ifndef VIOSRP_H
  35 #define VIOSRP_H
  36 #include <scsi/srp.h>
  37
  38 #define SRP_VERSION "16.a"
  39 #define SRP_MAX_IU_LEN  256
  40 #define SRP_MAX_LOC_LEN 32
  41
  42 union srp_iu {
  43         struct srp_login_req login_req;
  44         struct srp_login_rsp login_rsp;
  45         struct srp_login_rej login_rej;
  46         struct srp_i_logout i_logout;
  47         struct srp_t_logout t_logout;
  48         struct srp_tsk_mgmt tsk_mgmt;
  49         struct srp_cmd cmd;
  50         struct srp_rsp rsp;
  51         u8 reserved[SRP_MAX_IU_LEN];
  52 };
  53
  54 enum viosrp_crq_formats {
  55         VIOSRP_SRP_FORMAT = 0x01,
  56         VIOSRP_MAD_FORMAT = 0x02,
  57         VIOSRP_OS400_FORMAT = 0x03,
  58         VIOSRP_AIX_FORMAT = 0x04,
  59         VIOSRP_LINUX_FORMAT = 0x06,
  60         VIOSRP_INLINE_FORMAT = 0x07
  61 };
  62
  63 enum viosrp_crq_status {
  64         VIOSRP_OK = 0x0,
  65         VIOSRP_NONRECOVERABLE_ERR = 0x1,
  66         VIOSRP_VIOLATES_MAX_XFER = 0x2,
  67         VIOSRP_PARTNER_PANIC = 0x3,
  68         VIOSRP_DEVICE_BUSY = 0x8,
  69         VIOSRP_ADAPTER_FAIL = 0x10,
  70         VIOSRP_OK2 = 0x99,
  71 };
  72
  73 struct viosrp_crq {
  74         u8 valid;               /* used by RPA */
  75         u8 format;              /* SCSI vs out-of-band */
  76         u8 reserved;
  77         u8 status;              /* non-scsi failure? (e.g. DMA failure) */
  78         __be16 timeout;         /* in seconds */
  79         __be16 IU_length;               /* in bytes */
  80         __be64 IU_data_ptr;     /* the TCE for transferring data */
  81 };
  82
  83 /* MADs are Management requests above and beyond the IUs defined in the SRP
  84  * standard.
  85  */
  86 enum viosrp_mad_types {
  87         VIOSRP_EMPTY_IU_TYPE = 0x01,
  88         VIOSRP_ERROR_LOG_TYPE = 0x02,
  89         VIOSRP_ADAPTER_INFO_TYPE = 0x03,
  90         VIOSRP_HOST_CONFIG_TYPE = 0x04,
  91         VIOSRP_CAPABILITIES_TYPE = 0x05,
  92         VIOSRP_ENABLE_FAST_FAIL = 0x08,
  93 };
  94
  95 enum viosrp_mad_status {
  96         VIOSRP_MAD_SUCCESS = 0x00,
  97         VIOSRP_MAD_NOT_SUPPORTED = 0xF1,
  98         VIOSRP_MAD_FAILED = 0xF7,
  99 };
 100
 101 enum viosrp_capability_type {
 102         MIGRATION_CAPABILITIES = 0x01,
 103         RESERVATION_CAPABILITIES = 0x02,
 104 };
 105
 106 enum viosrp_capability_support {
 107         SERVER_DOES_NOT_SUPPORTS_CAP = 0x0,
 108         SERVER_SUPPORTS_CAP = 0x01,
 109         SERVER_CAP_DATA = 0x02,
 110 };
 111
 112 enum viosrp_reserve_type {
 113         CLIENT_RESERVE_SCSI_2 = 0x01,
 114 };
 115
 116 enum viosrp_capability_flag {
 117         CLIENT_MIGRATED = 0x01,
 118         CLIENT_RECONNECT = 0x02,
 119         CAP_LIST_SUPPORTED = 0x04,
 120         CAP_LIST_DATA = 0x08,
 121 };
 122
 123 /*
 124  * Common MAD header
 125  */
 126 struct mad_common {
 127         __be32 type;
 128         __be16 status;
 129         __be16 length;
 130         __be64 tag;
 131 };
 132
 133 /*
 134  * All SRP (and MAD) requests normally flow from the
 135  * client to the server.  There is no way for the server to send
 136  * an asynchronous message back to the client.  The Empty IU is used
 137  * to hang out a meaningless request to the server so that it can respond
 138  * asynchrouously with something like a SCSI AER
 139  */
 140 struct viosrp_empty_iu {
 141         struct mad_common common;
 142         __be64 buffer;
 143         __be32 port;
 144 };
 145
 146 struct viosrp_error_log {
 147         struct mad_common common;
 148         __be64 buffer;
 149 };
 150
 151 struct viosrp_adapter_info {
 152         struct mad_common common;
 153         __be64 buffer;
 154 };
 155
 156 struct viosrp_host_config {
 157         struct mad_common common;
 158         __be64 buffer;
 159 };
 160
 161 struct viosrp_fast_fail {
 162         struct mad_common common;
 163 };
 164
 165 struct viosrp_capabilities {
 166         struct mad_common common;
 167         __be64 buffer;
 168 };
 169
 170 struct mad_capability_common {
 171         __be32 cap_type;
 172         __be16 length;
 173         __be16 server_support;
 174 };
 175
 176 struct mad_reserve_cap {
 177         struct mad_capability_common common;
 178         __be32 type;
 179 };
 180
 181 struct mad_migration_cap {
 182         struct mad_capability_common common;
 183         __be32 ecl;
 184 };
 185
 186 struct capabilities{
 187         __be32 flags;
 188         char name[SRP_MAX_LOC_LEN];
 189         char loc[SRP_MAX_LOC_LEN];
 190         struct mad_migration_cap migration;
 191         struct mad_reserve_cap reserve;
 192 };
 193
 194 union mad_iu {
 195         struct viosrp_empty_iu empty_iu;
 196         struct viosrp_error_log error_log;
 197         struct viosrp_adapter_info adapter_info;
 198         struct viosrp_host_config host_config;
 199         struct viosrp_fast_fail fast_fail;
 200         struct viosrp_capabilities capabilities;
 201 };
 202
 203 union viosrp_iu {
 204         union srp_iu srp;
 205         union mad_iu mad;
 206 };
 207
 208 struct mad_adapter_info_data {
 209         char srp_version[8];
 210         char partition_name[96];
 211         __be32 partition_number;
 212         __be32 mad_version;
 213         __be32 os_type;
 214         __be32 port_max_txu[8]; /* per-port maximum transfer */
 215 };
 216
 217 #endif