LXR linux/include/scsi/fc/fc

   1/*
   2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
   3 *
   4 * This program is free software; you can redistribute it and/or modify it
   5 * under the terms and conditions of the GNU General Public License,
   6 * version 2, as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope it will be useful, but WITHOUT
   9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11 * more details.
  12 *
  13 * You should have received a copy of the GNU General Public License along with
  14 * this program; if not, write to the Free Software Foundation, Inc.,
  15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  16 *
  17 * Maintained at www.Open-FCoE.org
  18 */
  19
  20#ifndef _FC_FS_H_
  21#define _FC_FS_H_
  22
  23#include <linux/types.h>
  24
  25/*
  26 * Fibre Channel Framing and Signalling definitions.
  27 * From T11 FC-FS-2 Rev 0.90 - 9 August 2005.
  28 */
  29
  30/*
  31 * Frame header
  32 */
  33struct fc_frame_header {
  34        __u8          fh_r_ctl; /* routing control */
  35        __u8          fh_d_id[3];       /* Destination ID */
  36
  37        __u8          fh_cs_ctl;        /* class of service control / pri */
  38        __u8          fh_s_id[3];       /* Source ID */
  39
  40        __u8          fh_type;          /* see enum fc_fh_type below */
  41        __u8          fh_f_ctl[3];      /* frame control */
  42
  43        __u8          fh_seq_id;        /* sequence ID */
  44        __u8          fh_df_ctl;        /* data field control */
  45        __be16        fh_seq_cnt;       /* sequence count */
  46
  47        __be16        fh_ox_id;         /* originator exchange ID */
  48        __be16        fh_rx_id;         /* responder exchange ID */
  49        __be32        fh_parm_offset;   /* parameter or relative offset */
  50};
  51
  52#define FC_FRAME_HEADER_LEN 24  /* expected length of structure */
  53
  54#define FC_MAX_PAYLOAD  2112U           /* max payload length in bytes */
  55#define FC_MIN_MAX_PAYLOAD  256U        /* lower limit on max payload */
  56
  57#define FC_MAX_FRAME    (FC_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
  58#define FC_MIN_MAX_FRAME (FC_MIN_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
  59
  60/*
  61 * fh_r_ctl - Routing control definitions.
  62 */
  63    /*
  64     * FC-4 device_data.
  65     */
  66enum fc_rctl {
  67        FC_RCTL_DD_UNCAT = 0x00,        /* uncategorized information */
  68        FC_RCTL_DD_SOL_DATA = 0x01,     /* solicited data */
  69        FC_RCTL_DD_UNSOL_CTL = 0x02,    /* unsolicited control */
  70        FC_RCTL_DD_SOL_CTL = 0x03,      /* solicited control or reply */
  71        FC_RCTL_DD_UNSOL_DATA = 0x04,   /* unsolicited data */
  72        FC_RCTL_DD_DATA_DESC = 0x05,    /* data descriptor */
  73        FC_RCTL_DD_UNSOL_CMD = 0x06,    /* unsolicited command */
  74        FC_RCTL_DD_CMD_STATUS = 0x07,   /* command status */
  75
  76#define FC_RCTL_ILS_REQ FC_RCTL_DD_UNSOL_CTL    /* ILS request */
  77#define FC_RCTL_ILS_REP FC_RCTL_DD_SOL_CTL      /* ILS reply */
  78
  79        /*
  80         * Extended Link_Data
  81         */
  82        FC_RCTL_ELS_REQ = 0x22, /* extended link services request */
  83        FC_RCTL_ELS_REP = 0x23, /* extended link services reply */
  84        FC_RCTL_ELS4_REQ = 0x32, /* FC-4 ELS request */
  85        FC_RCTL_ELS4_REP = 0x33, /* FC-4 ELS reply */
  86        /*
  87         * Optional Extended Headers
  88         */
  89        FC_RCTL_VFTH = 0x50,    /* virtual fabric tagging header */
  90        FC_RCTL_IFRH = 0x51,    /* inter-fabric routing header */
  91        FC_RCTL_ENCH = 0x52,    /* encapsulation header */
  92        /*
  93         * Basic Link Services fh_r_ctl values.
  94         */
  95        FC_RCTL_BA_NOP = 0x80,  /* basic link service NOP */
  96        FC_RCTL_BA_ABTS = 0x81, /* basic link service abort */
  97        FC_RCTL_BA_RMC = 0x82,  /* remove connection */
  98        FC_RCTL_BA_ACC = 0x84,  /* basic accept */
  99        FC_RCTL_BA_RJT = 0x85,  /* basic reject */
 100        FC_RCTL_BA_PRMT = 0x86, /* dedicated connection preempted */
 101        /*
 102         * Link Control Information.
 103         */
 104        FC_RCTL_ACK_1 = 0xc0,   /* acknowledge_1 */
 105        FC_RCTL_ACK_0 = 0xc1,   /* acknowledge_0 */
 106        FC_RCTL_P_RJT = 0xc2,   /* port reject */
 107        FC_RCTL_F_RJT = 0xc3,   /* fabric reject */
 108        FC_RCTL_P_BSY = 0xc4,   /* port busy */
 109        FC_RCTL_F_BSY = 0xc5,   /* fabric busy to data frame */
 110        FC_RCTL_F_BSYL = 0xc6,  /* fabric busy to link control frame */
 111        FC_RCTL_LCR = 0xc7,     /* link credit reset */
 112        FC_RCTL_END = 0xc9,     /* end */
 113};
 114                                    /* incomplete list of definitions */
 115
 116/*
 117 * R_CTL names initializer.
 118 * Please keep this matching the above definitions.
 119 */
 120#define FC_RCTL_NAMES_INIT { \
 121        [FC_RCTL_DD_UNCAT] =            "uncat",                        \
 122        [FC_RCTL_DD_SOL_DATA] =         "sol data",                     \
 123        [FC_RCTL_DD_UNSOL_CTL] =        "unsol ctl",                    \
 124        [FC_RCTL_DD_SOL_CTL] =          "sol ctl/reply",                \
 125        [FC_RCTL_DD_UNSOL_DATA] =       "unsol data",                   \
 126        [FC_RCTL_DD_DATA_DESC] =        "data desc",                    \
 127        [FC_RCTL_DD_UNSOL_CMD] =        "unsol cmd",                    \
 128        [FC_RCTL_DD_CMD_STATUS] =       "cmd status",                   \
 129        [FC_RCTL_ELS_REQ] =             "ELS req",                      \
 130        [FC_RCTL_ELS_REP] =             "ELS rep",                      \
 131        [FC_RCTL_ELS4_REQ] =            "FC-4 ELS req",                 \
 132        [FC_RCTL_ELS4_REP] =            "FC-4 ELS rep",                 \
 133        [FC_RCTL_BA_NOP] =              "BLS NOP",                      \
 134        [FC_RCTL_BA_ABTS] =             "BLS abort",                    \
 135        [FC_RCTL_BA_RMC] =              "BLS remove connection",        \
 136        [FC_RCTL_BA_ACC] =              "BLS accept",                   \
 137        [FC_RCTL_BA_RJT] =              "BLS reject",                   \
 138        [FC_RCTL_BA_PRMT] =             "BLS dedicated connection preempted", \
 139        [FC_RCTL_ACK_1] =               "LC ACK_1",                     \
 140        [FC_RCTL_ACK_0] =               "LC ACK_0",                     \
 141        [FC_RCTL_P_RJT] =               "LC port reject",               \
 142        [FC_RCTL_F_RJT] =               "LC fabric reject",             \
 143        [FC_RCTL_P_BSY] =               "LC port busy",                 \
 144        [FC_RCTL_F_BSY] =               "LC fabric busy to data frame", \
 145        [FC_RCTL_F_BSYL] =              "LC fabric busy to link control frame",\
 146        [FC_RCTL_LCR] =                 "LC link credit reset",         \
 147        [FC_RCTL_END] =                 "LC end",                       \
 148}
 149
 150/*
 151 * Well-known fabric addresses.
 152 */
 153enum fc_well_known_fid {
 154        FC_FID_NONE =           0x000000,       /* No destination */
 155        FC_FID_BCAST =          0xffffff,       /* broadcast */
 156        FC_FID_FLOGI =          0xfffffe,       /* fabric login */
 157        FC_FID_FCTRL =          0xfffffd,       /* fabric controller */
 158        FC_FID_DIR_SERV =       0xfffffc,       /* directory server */
 159        FC_FID_TIME_SERV =      0xfffffb,       /* time server */
 160        FC_FID_MGMT_SERV =      0xfffffa,       /* management server */
 161        FC_FID_QOS =            0xfffff9,       /* QoS Facilitator */
 162        FC_FID_ALIASES =        0xfffff8,       /* alias server (FC-PH2) */
 163        FC_FID_SEC_KEY =        0xfffff7,       /* Security key dist. server */
 164        FC_FID_CLOCK =          0xfffff6,       /* clock synch server */
 165        FC_FID_MCAST_SERV =     0xfffff5,       /* multicast server */
 166};
 167
 168#define FC_FID_WELL_KNOWN_MAX   0xffffff /* highest well-known fabric ID */
 169#define FC_FID_WELL_KNOWN_BASE  0xfffff5 /* start of well-known fabric ID */
 170
 171/*
 172 * Other well-known addresses, outside the above contiguous range.
 173 */
 174#define FC_FID_DOM_MGR          0xfffc00        /* domain manager base */
 175
 176/*
 177 * Fabric ID bytes.
 178 */
 179#define FC_FID_DOMAIN           0
 180#define FC_FID_PORT             1
 181#define FC_FID_LINK             2
 182
 183/*
 184 * fh_type codes
 185 */
 186enum fc_fh_type {
 187        FC_TYPE_BLS =   0x00,   /* basic link service */
 188        FC_TYPE_ELS =   0x01,   /* extended link service */
 189        FC_TYPE_IP =    0x05,   /* IP over FC, RFC 4338 */
 190        FC_TYPE_FCP =   0x08,   /* SCSI FCP */
 191        FC_TYPE_CT =    0x20,   /* Fibre Channel Services (FC-CT) */
 192        FC_TYPE_ILS =   0x22,   /* internal link service */
 193};
 194
 195/*
 196 * FC_TYPE names initializer.
 197 * Please keep this matching the above definitions.
 198 */
 199#define FC_TYPE_NAMES_INIT {                            \
 200        [FC_TYPE_BLS] =         "BLS",                  \
 201        [FC_TYPE_ELS] =         "ELS",                  \
 202        [FC_TYPE_IP] =          "IP",                   \
 203        [FC_TYPE_FCP] =         "FCP",                  \
 204        [FC_TYPE_CT] =          "CT",                   \
 205        [FC_TYPE_ILS] =         "ILS",                  \
 206}
 207
 208/*
 209 * Exchange IDs.
 210 */
 211#define FC_XID_UNKNOWN  0xffff  /* unknown exchange ID */
 212#define FC_XID_MIN      0x0     /* supported min exchange ID */
 213#define FC_XID_MAX      0xfffe  /* supported max exchange ID */
 214
 215/*
 216 * fh_f_ctl - Frame control flags.
 217 */
 218#define FC_FC_EX_CTX    (1 << 23)       /* sent by responder to exchange */
 219#define FC_FC_SEQ_CTX   (1 << 22)       /* sent by responder to sequence */
 220#define FC_FC_FIRST_SEQ (1 << 21)       /* first sequence of this exchange */
 221#define FC_FC_LAST_SEQ  (1 << 20)       /* last sequence of this exchange */
 222#define FC_FC_END_SEQ   (1 << 19)       /* last frame of sequence */
 223#define FC_FC_END_CONN  (1 << 18)       /* end of class 1 connection pending */
 224#define FC_FC_RES_B17   (1 << 17)       /* reserved */
 225#define FC_FC_SEQ_INIT  (1 << 16)       /* transfer of sequence initiative */
 226#define FC_FC_X_ID_REASS (1 << 15)      /* exchange ID has been changed */
 227#define FC_FC_X_ID_INVAL (1 << 14)      /* exchange ID invalidated */
 228
 229#define FC_FC_ACK_1     (1 << 12)       /* 13:12 = 1: ACK_1 expected */
 230#define FC_FC_ACK_N     (2 << 12)       /* 13:12 = 2: ACK_N expected */
 231#define FC_FC_ACK_0     (3 << 12)       /* 13:12 = 3: ACK_0 expected */
 232
 233#define FC_FC_RES_B11   (1 << 11)       /* reserved */
 234#define FC_FC_RES_B10   (1 << 10)       /* reserved */
 235#define FC_FC_RETX_SEQ  (1 << 9)        /* retransmitted sequence */
 236#define FC_FC_UNI_TX    (1 << 8)        /* unidirectional transmit (class 1) */
 237#define FC_FC_CONT_SEQ(i) ((i) << 6)
 238#define FC_FC_ABT_SEQ(i) ((i) << 4)
 239#define FC_FC_REL_OFF   (1 << 3)        /* parameter is relative offset */
 240#define FC_FC_RES2      (1 << 2)        /* reserved */
 241#define FC_FC_FILL(i)   ((i) & 3)       /* 1:0: bytes of trailing fill */
 242
 243/*
 244 * BA_ACC payload.
 245 */
 246struct fc_ba_acc {
 247        __u8            ba_seq_id_val;  /* SEQ_ID validity */
 248#define FC_BA_SEQ_ID_VAL 0x80
 249        __u8            ba_seq_id;      /* SEQ_ID of seq last deliverable */
 250        __u8            ba_resvd[2];    /* reserved */
 251        __be16          ba_ox_id;       /* OX_ID for aborted seq or exch */
 252        __be16          ba_rx_id;       /* RX_ID for aborted seq or exch */
 253        __be16          ba_low_seq_cnt; /* low SEQ_CNT of aborted seq */
 254        __be16          ba_high_seq_cnt; /* high SEQ_CNT of aborted seq */
 255};
 256
 257/*
 258 * BA_RJT: Basic Reject payload.
 259 */
 260struct fc_ba_rjt {
 261        __u8            br_resvd;       /* reserved */
 262        __u8            br_reason;      /* reason code */
 263        __u8            br_explan;      /* reason explanation */
 264        __u8            br_vendor;      /* vendor unique code */
 265};
 266
 267/*
 268 * BA_RJT reason codes.
 269 * From FS-2.
 270 */
 271enum fc_ba_rjt_reason {
 272        FC_BA_RJT_NONE =        0,      /* in software this means no reject */
 273        FC_BA_RJT_INVL_CMD =    0x01,   /* invalid command code */
 274        FC_BA_RJT_LOG_ERR =     0x03,   /* logical error */
 275        FC_BA_RJT_LOG_BUSY =    0x05,   /* logical busy */
 276        FC_BA_RJT_PROTO_ERR =   0x07,   /* protocol error */
 277        FC_BA_RJT_UNABLE =      0x09,   /* unable to perform request */
 278        FC_BA_RJT_VENDOR =      0xff,   /* vendor-specific (see br_vendor) */
 279};
 280
 281/*
 282 * BA_RJT reason code explanations.
 283 */
 284enum fc_ba_rjt_explan {
 285        FC_BA_RJT_EXP_NONE =    0x00,   /* no additional expanation */
 286        FC_BA_RJT_INV_XID =     0x03,   /* invalid OX_ID-RX_ID combination */
 287        FC_BA_RJT_ABT =         0x05,   /* sequence aborted, no seq info */
 288};
 289
 290/*
 291 * P_RJT or F_RJT: Port Reject or Fabric Reject parameter field.
 292 */
 293struct fc_pf_rjt {
 294        __u8            rj_action;      /* reserved */
 295        __u8            rj_reason;      /* reason code */
 296        __u8            rj_resvd;       /* reserved */
 297        __u8            rj_vendor;      /* vendor unique code */
 298};
 299
 300/*
 301 * P_RJT and F_RJT reject reason codes.
 302 */
 303enum fc_pf_rjt_reason {
 304        FC_RJT_NONE =           0,      /* non-reject (reserved by standard) */
 305        FC_RJT_INVL_DID =       0x01,   /* invalid destination ID */
 306        FC_RJT_INVL_SID =       0x02,   /* invalid source ID */
 307        FC_RJT_P_UNAV_T =       0x03,   /* port unavailable, temporary */
 308        FC_RJT_P_UNAV =         0x04,   /* port unavailable, permanent */
 309        FC_RJT_CLS_UNSUP =      0x05,   /* class not supported */
 310        FC_RJT_DEL_USAGE =      0x06,   /* delimiter usage error */
 311        FC_RJT_TYPE_UNSUP =     0x07,   /* type not supported */
 312        FC_RJT_LINK_CTL =       0x08,   /* invalid link control */
 313        FC_RJT_R_CTL =          0x09,   /* invalid R_CTL field */
 314        FC_RJT_F_CTL =          0x0a,   /* invalid F_CTL field */
 315        FC_RJT_OX_ID =          0x0b,   /* invalid originator exchange ID */
 316        FC_RJT_RX_ID =          0x0c,   /* invalid responder exchange ID */
 317        FC_RJT_SEQ_ID =         0x0d,   /* invalid sequence ID */
 318        FC_RJT_DF_CTL =         0x0e,   /* invalid DF_CTL field */
 319        FC_RJT_SEQ_CNT =        0x0f,   /* invalid SEQ_CNT field */
 320        FC_RJT_PARAM =          0x10,   /* invalid parameter field */
 321        FC_RJT_EXCH_ERR =       0x11,   /* exchange error */
 322        FC_RJT_PROTO =          0x12,   /* protocol error */
 323        FC_RJT_LEN =            0x13,   /* incorrect length */
 324        FC_RJT_UNEXP_ACK =      0x14,   /* unexpected ACK */
 325        FC_RJT_FAB_CLASS =      0x15,   /* class unsupported by fabric entity */
 326        FC_RJT_LOGI_REQ =       0x16,   /* login required */
 327        FC_RJT_SEQ_XS =         0x17,   /* excessive sequences attempted */
 328        FC_RJT_EXCH_EST =       0x18,   /* unable to establish exchange */
 329        FC_RJT_FAB_UNAV =       0x1a,   /* fabric unavailable */
 330        FC_RJT_VC_ID =          0x1b,   /* invalid VC_ID (class 4) */
 331        FC_RJT_CS_CTL =         0x1c,   /* invalid CS_CTL field */
 332        FC_RJT_INSUF_RES =      0x1d,   /* insuff. resources for VC (Class 4) */
 333        FC_RJT_INVL_CLS =       0x1f,   /* invalid class of service */
 334        FC_RJT_PREEMT_RJT =     0x20,   /* preemption request rejected */
 335        FC_RJT_PREEMT_DIS =     0x21,   /* preemption not enabled */
 336        FC_RJT_MCAST_ERR =      0x22,   /* multicast error */
 337        FC_RJT_MCAST_ET =       0x23,   /* multicast error terminate */
 338        FC_RJT_PRLI_REQ =       0x24,   /* process login required */
 339        FC_RJT_INVL_ATT =       0x25,   /* invalid attachment */
 340        FC_RJT_VENDOR =         0xff,   /* vendor specific reject */
 341};
 342
 343/* default timeout values */
 344
 345#define FC_DEF_E_D_TOV  2000UL
 346#define FC_DEF_R_A_TOV  10000UL
 347
 348#endif /* _FC_FS_H_ */
 349