include/uapi/scsi/fc/fc_fs.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright(c) 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Maintained at www.Open-FCoE.org
   6  */
   7
   8 #ifndef _FC_FS_H_
   9 #define _FC_FS_H_
  10
  11 #include <linux/types.h>
  12
  13 /*
  14  * Fibre Channel Framing and Signalling definitions.
  15  * From T11 FC-FS-2 Rev 0.90 - 9 August 2005.
  16  */
  17
  18 /*
  19  * Frame header
  20  */
  21 struct fc_frame_header {
  22         __u8          fh_r_ctl; /* routing control */
  23         __u8          fh_d_id[3];       /* Destination ID */
  24
  25         __u8          fh_cs_ctl;        /* class of service control / pri */
  26         __u8          fh_s_id[3];       /* Source ID */
  27
  28         __u8          fh_type;          /* see enum fc_fh_type below */
  29         __u8          fh_f_ctl[3];      /* frame control */
  30
  31         __u8          fh_seq_id;        /* sequence ID */
  32         __u8          fh_df_ctl;        /* data field control */
  33         __be16        fh_seq_cnt;       /* sequence count */
  34
  35         __be16        fh_ox_id;         /* originator exchange ID */
  36         __be16        fh_rx_id;         /* responder exchange ID */
  37         __be32        fh_parm_offset;   /* parameter or relative offset */
  38 };
  39
  40 #define FC_FRAME_HEADER_LEN 24  /* expected length of structure */
  41
  42 #define FC_MAX_PAYLOAD  2112U           /* max payload length in bytes */
  43 #define FC_MIN_MAX_PAYLOAD  256U        /* lower limit on max payload */
  44
  45 #define FC_MAX_FRAME    (FC_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
  46 #define FC_MIN_MAX_FRAME (FC_MIN_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
  47
  48 /*
  49  * fh_r_ctl - Routing control definitions.
  50  */
  51     /*
  52      * FC-4 device_data.
  53      */
  54 enum fc_rctl {
  55         FC_RCTL_DD_UNCAT = 0x00,        /* uncategorized information */
  56         FC_RCTL_DD_SOL_DATA = 0x01,     /* solicited data */
  57         FC_RCTL_DD_UNSOL_CTL = 0x02,    /* unsolicited control */
  58         FC_RCTL_DD_SOL_CTL = 0x03,      /* solicited control or reply */
  59         FC_RCTL_DD_UNSOL_DATA = 0x04,   /* unsolicited data */
  60         FC_RCTL_DD_DATA_DESC = 0x05,    /* data descriptor */
  61         FC_RCTL_DD_UNSOL_CMD = 0x06,    /* unsolicited command */
  62         FC_RCTL_DD_CMD_STATUS = 0x07,   /* command status */
  63
  64 #define FC_RCTL_ILS_REQ FC_RCTL_DD_UNSOL_CTL    /* ILS request */
  65 #define FC_RCTL_ILS_REP FC_RCTL_DD_SOL_CTL      /* ILS reply */
  66
  67         /*
  68          * Extended Link_Data
  69          */
  70         FC_RCTL_ELS_REQ = 0x22, /* extended link services request */
  71         FC_RCTL_ELS_REP = 0x23, /* extended link services reply */
  72         FC_RCTL_ELS4_REQ = 0x32, /* FC-4 ELS request */
  73         FC_RCTL_ELS4_REP = 0x33, /* FC-4 ELS reply */
  74         /*
  75          * Optional Extended Headers
  76          */
  77         FC_RCTL_VFTH = 0x50,    /* virtual fabric tagging header */
  78         FC_RCTL_IFRH = 0x51,    /* inter-fabric routing header */
  79         FC_RCTL_ENCH = 0x52,    /* encapsulation header */
  80         /*
  81          * Basic Link Services fh_r_ctl values.
  82          */
  83         FC_RCTL_BA_NOP = 0x80,  /* basic link service NOP */
  84         FC_RCTL_BA_ABTS = 0x81, /* basic link service abort */
  85         FC_RCTL_BA_RMC = 0x82,  /* remove connection */
  86         FC_RCTL_BA_ACC = 0x84,  /* basic accept */
  87         FC_RCTL_BA_RJT = 0x85,  /* basic reject */
  88         FC_RCTL_BA_PRMT = 0x86, /* dedicated connection preempted */
  89         /*
  90          * Link Control Information.
  91          */
  92         FC_RCTL_ACK_1 = 0xc0,   /* acknowledge_1 */
  93         FC_RCTL_ACK_0 = 0xc1,   /* acknowledge_0 */
  94         FC_RCTL_P_RJT = 0xc2,   /* port reject */
  95         FC_RCTL_F_RJT = 0xc3,   /* fabric reject */
  96         FC_RCTL_P_BSY = 0xc4,   /* port busy */
  97         FC_RCTL_F_BSY = 0xc5,   /* fabric busy to data frame */
  98         FC_RCTL_F_BSYL = 0xc6,  /* fabric busy to link control frame */
  99         FC_RCTL_LCR = 0xc7,     /* link credit reset */
 100         FC_RCTL_END = 0xc9,     /* end */
 101 };
 102                                     /* incomplete list of definitions */
 103
 104 /*
 105  * R_CTL names initializer.
 106  * Please keep this matching the above definitions.
 107  */
 108 #define FC_RCTL_NAMES_INIT { \
 109         [FC_RCTL_DD_UNCAT] =            "uncat",                        \
 110         [FC_RCTL_DD_SOL_DATA] =         "sol data",                     \
 111         [FC_RCTL_DD_UNSOL_CTL] =        "unsol ctl",                    \
 112         [FC_RCTL_DD_SOL_CTL] =          "sol ctl/reply",                \
 113         [FC_RCTL_DD_UNSOL_DATA] =       "unsol data",                   \
 114         [FC_RCTL_DD_DATA_DESC] =        "data desc",                    \
 115         [FC_RCTL_DD_UNSOL_CMD] =        "unsol cmd",                    \
 116         [FC_RCTL_DD_CMD_STATUS] =       "cmd status",                   \
 117         [FC_RCTL_ELS_REQ] =             "ELS req",                      \
 118         [FC_RCTL_ELS_REP] =             "ELS rep",                      \
 119         [FC_RCTL_ELS4_REQ] =            "FC-4 ELS req",                 \
 120         [FC_RCTL_ELS4_REP] =            "FC-4 ELS rep",                 \
 121         [FC_RCTL_BA_NOP] =              "BLS NOP",                      \
 122         [FC_RCTL_BA_ABTS] =             "BLS abort",                    \
 123         [FC_RCTL_BA_RMC] =              "BLS remove connection",        \
 124         [FC_RCTL_BA_ACC] =              "BLS accept",                   \
 125         [FC_RCTL_BA_RJT] =              "BLS reject",                   \
 126         [FC_RCTL_BA_PRMT] =             "BLS dedicated connection preempted", \
 127         [FC_RCTL_ACK_1] =               "LC ACK_1",                     \
 128         [FC_RCTL_ACK_0] =               "LC ACK_0",                     \
 129         [FC_RCTL_P_RJT] =               "LC port reject",               \
 130         [FC_RCTL_F_RJT] =               "LC fabric reject",             \
 131         [FC_RCTL_P_BSY] =               "LC port busy",                 \
 132         [FC_RCTL_F_BSY] =               "LC fabric busy to data frame", \
 133         [FC_RCTL_F_BSYL] =              "LC fabric busy to link control frame",\
 134         [FC_RCTL_LCR] =                 "LC link credit reset",         \
 135         [FC_RCTL_END] =                 "LC end",                       \
 136 }
 137
 138 /*
 139  * Well-known fabric addresses.
 140  */
 141 enum fc_well_known_fid {
 142         FC_FID_NONE =           0x000000,       /* No destination */
 143         FC_FID_BCAST =          0xffffff,       /* broadcast */
 144         FC_FID_FLOGI =          0xfffffe,       /* fabric login */
 145         FC_FID_FCTRL =          0xfffffd,       /* fabric controller */
 146         FC_FID_DIR_SERV =       0xfffffc,       /* directory server */
 147         FC_FID_TIME_SERV =      0xfffffb,       /* time server */
 148         FC_FID_MGMT_SERV =      0xfffffa,       /* management server */
 149         FC_FID_QOS =            0xfffff9,       /* QoS Facilitator */
 150         FC_FID_ALIASES =        0xfffff8,       /* alias server (FC-PH2) */
 151         FC_FID_SEC_KEY =        0xfffff7,       /* Security key dist. server */
 152         FC_FID_CLOCK =          0xfffff6,       /* clock synch server */
 153         FC_FID_MCAST_SERV =     0xfffff5,       /* multicast server */
 154 };
 155
 156 #define FC_FID_WELL_KNOWN_MAX   0xffffff /* highest well-known fabric ID */
 157 #define FC_FID_WELL_KNOWN_BASE  0xfffff5 /* start of well-known fabric ID */
 158
 159 /*
 160  * Other well-known addresses, outside the above contiguous range.
 161  */
 162 #define FC_FID_DOM_MGR          0xfffc00        /* domain manager base */
 163
 164 /*
 165  * Fabric ID bytes.
 166  */
 167 #define FC_FID_DOMAIN           0
 168 #define FC_FID_PORT             1
 169 #define FC_FID_LINK             2
 170
 171 /*
 172  * fh_type codes
 173  */
 174 enum fc_fh_type {
 175         FC_TYPE_BLS =   0x00,   /* basic link service */
 176         FC_TYPE_ELS =   0x01,   /* extended link service */
 177         FC_TYPE_IP =    0x05,   /* IP over FC, RFC 4338 */
 178         FC_TYPE_FCP =   0x08,   /* SCSI FCP */
 179         FC_TYPE_CT =    0x20,   /* Fibre Channel Services (FC-CT) */
 180         FC_TYPE_ILS =   0x22,   /* internal link service */
 181         FC_TYPE_NVME =  0x28,   /* FC-NVME */
 182 };
 183
 184 /*
 185  * FC_TYPE names initializer.
 186  * Please keep this matching the above definitions.
 187  */
 188 #define FC_TYPE_NAMES_INIT {                            \
 189         [FC_TYPE_BLS] =         "BLS",                  \
 190         [FC_TYPE_ELS] =         "ELS",                  \
 191         [FC_TYPE_IP] =          "IP",                   \
 192         [FC_TYPE_FCP] =         "FCP",                  \
 193         [FC_TYPE_CT] =          "CT",                   \
 194         [FC_TYPE_ILS] =         "ILS",                  \
 195         [FC_TYPE_NVME] =        "NVME",                 \
 196 }
 197
 198 /*
 199  * Exchange IDs.
 200  */
 201 #define FC_XID_UNKNOWN  0xffff  /* unknown exchange ID */
 202 #define FC_XID_MIN      0x0     /* supported min exchange ID */
 203 #define FC_XID_MAX      0xfffe  /* supported max exchange ID */
 204
 205 /*
 206  * fh_f_ctl - Frame control flags.
 207  */
 208 #define FC_FC_EX_CTX    (1 << 23)       /* sent by responder to exchange */
 209 #define FC_FC_SEQ_CTX   (1 << 22)       /* sent by responder to sequence */
 210 #define FC_FC_FIRST_SEQ (1 << 21)       /* first sequence of this exchange */
 211 #define FC_FC_LAST_SEQ  (1 << 20)       /* last sequence of this exchange */
 212 #define FC_FC_END_SEQ   (1 << 19)       /* last frame of sequence */
 213 #define FC_FC_END_CONN  (1 << 18)       /* end of class 1 connection pending */
 214 #define FC_FC_RES_B17   (1 << 17)       /* reserved */
 215 #define FC_FC_SEQ_INIT  (1 << 16)       /* transfer of sequence initiative */
 216 #define FC_FC_X_ID_REASS (1 << 15)      /* exchange ID has been changed */
 217 #define FC_FC_X_ID_INVAL (1 << 14)      /* exchange ID invalidated */
 218
 219 #define FC_FC_ACK_1     (1 << 12)       /* 13:12 = 1: ACK_1 expected */
 220 #define FC_FC_ACK_N     (2 << 12)       /* 13:12 = 2: ACK_N expected */
 221 #define FC_FC_ACK_0     (3 << 12)       /* 13:12 = 3: ACK_0 expected */
 222
 223 #define FC_FC_RES_B11   (1 << 11)       /* reserved */
 224 #define FC_FC_RES_B10   (1 << 10)       /* reserved */
 225 #define FC_FC_RETX_SEQ  (1 << 9)        /* retransmitted sequence */
 226 #define FC_FC_UNI_TX    (1 << 8)        /* unidirectional transmit (class 1) */
 227 #define FC_FC_CONT_SEQ(i) ((i) << 6)
 228 #define FC_FC_ABT_SEQ(i) ((i) << 4)
 229 #define FC_FC_REL_OFF   (1 << 3)        /* parameter is relative offset */
 230 #define FC_FC_RES2      (1 << 2)        /* reserved */
 231 #define FC_FC_FILL(i)   ((i) & 3)       /* 1:0: bytes of trailing fill */
 232
 233 /*
 234  * BA_ACC payload.
 235  */
 236 struct fc_ba_acc {
 237         __u8            ba_seq_id_val;  /* SEQ_ID validity */
 238 #define FC_BA_SEQ_ID_VAL 0x80
 239         __u8            ba_seq_id;      /* SEQ_ID of seq last deliverable */
 240         __u8            ba_resvd[2];    /* reserved */
 241         __be16          ba_ox_id;       /* OX_ID for aborted seq or exch */
 242         __be16          ba_rx_id;       /* RX_ID for aborted seq or exch */
 243         __be16          ba_low_seq_cnt; /* low SEQ_CNT of aborted seq */
 244         __be16          ba_high_seq_cnt; /* high SEQ_CNT of aborted seq */
 245 };
 246
 247 /*
 248  * BA_RJT: Basic Reject payload.
 249  */
 250 struct fc_ba_rjt {
 251         __u8            br_resvd;       /* reserved */
 252         __u8            br_reason;      /* reason code */
 253         __u8            br_explan;      /* reason explanation */
 254         __u8            br_vendor;      /* vendor unique code */
 255 };
 256
 257 /*
 258  * BA_RJT reason codes.
 259  * From FS-2.
 260  */
 261 enum fc_ba_rjt_reason {
 262         FC_BA_RJT_NONE =        0,      /* in software this means no reject */
 263         FC_BA_RJT_INVL_CMD =    0x01,   /* invalid command code */
 264         FC_BA_RJT_LOG_ERR =     0x03,   /* logical error */
 265         FC_BA_RJT_LOG_BUSY =    0x05,   /* logical busy */
 266         FC_BA_RJT_PROTO_ERR =   0x07,   /* protocol error */
 267         FC_BA_RJT_UNABLE =      0x09,   /* unable to perform request */
 268         FC_BA_RJT_VENDOR =      0xff,   /* vendor-specific (see br_vendor) */
 269 };
 270
 271 /*
 272  * BA_RJT reason code explanations.
 273  */
 274 enum fc_ba_rjt_explan {
 275         FC_BA_RJT_EXP_NONE =    0x00,   /* no additional expanation */
 276         FC_BA_RJT_INV_XID =     0x03,   /* invalid OX_ID-RX_ID combination */
 277         FC_BA_RJT_ABT =         0x05,   /* sequence aborted, no seq info */
 278 };
 279
 280 /*
 281  * P_RJT or F_RJT: Port Reject or Fabric Reject parameter field.
 282  */
 283 struct fc_pf_rjt {
 284         __u8            rj_action;      /* reserved */
 285         __u8            rj_reason;      /* reason code */
 286         __u8            rj_resvd;       /* reserved */
 287         __u8            rj_vendor;      /* vendor unique code */
 288 };
 289
 290 /*
 291  * P_RJT and F_RJT reject reason codes.
 292  */
 293 enum fc_pf_rjt_reason {
 294         FC_RJT_NONE =           0,      /* non-reject (reserved by standard) */
 295         FC_RJT_INVL_DID =       0x01,   /* invalid destination ID */
 296         FC_RJT_INVL_SID =       0x02,   /* invalid source ID */
 297         FC_RJT_P_UNAV_T =       0x03,   /* port unavailable, temporary */
 298         FC_RJT_P_UNAV =         0x04,   /* port unavailable, permanent */
 299         FC_RJT_CLS_UNSUP =      0x05,   /* class not supported */
 300         FC_RJT_DEL_USAGE =      0x06,   /* delimiter usage error */
 301         FC_RJT_TYPE_UNSUP =     0x07,   /* type not supported */
 302         FC_RJT_LINK_CTL =       0x08,   /* invalid link control */
 303         FC_RJT_R_CTL =          0x09,   /* invalid R_CTL field */
 304         FC_RJT_F_CTL =          0x0a,   /* invalid F_CTL field */
 305         FC_RJT_OX_ID =          0x0b,   /* invalid originator exchange ID */
 306         FC_RJT_RX_ID =          0x0c,   /* invalid responder exchange ID */
 307         FC_RJT_SEQ_ID =         0x0d,   /* invalid sequence ID */
 308         FC_RJT_DF_CTL =         0x0e,   /* invalid DF_CTL field */
 309         FC_RJT_SEQ_CNT =        0x0f,   /* invalid SEQ_CNT field */
 310         FC_RJT_PARAM =          0x10,   /* invalid parameter field */
 311         FC_RJT_EXCH_ERR =       0x11,   /* exchange error */
 312         FC_RJT_PROTO =          0x12,   /* protocol error */
 313         FC_RJT_LEN =            0x13,   /* incorrect length */
 314         FC_RJT_UNEXP_ACK =      0x14,   /* unexpected ACK */
 315         FC_RJT_FAB_CLASS =      0x15,   /* class unsupported by fabric entity */
 316         FC_RJT_LOGI_REQ =       0x16,   /* login required */
 317         FC_RJT_SEQ_XS =         0x17,   /* excessive sequences attempted */
 318         FC_RJT_EXCH_EST =       0x18,   /* unable to establish exchange */
 319         FC_RJT_FAB_UNAV =       0x1a,   /* fabric unavailable */
 320         FC_RJT_VC_ID =          0x1b,   /* invalid VC_ID (class 4) */
 321         FC_RJT_CS_CTL =         0x1c,   /* invalid CS_CTL field */
 322         FC_RJT_INSUF_RES =      0x1d,   /* insuff. resources for VC (Class 4) */
 323         FC_RJT_INVL_CLS =       0x1f,   /* invalid class of service */
 324         FC_RJT_PREEMT_RJT =     0x20,   /* preemption request rejected */
 325         FC_RJT_PREEMT_DIS =     0x21,   /* preemption not enabled */
 326         FC_RJT_MCAST_ERR =      0x22,   /* multicast error */
 327         FC_RJT_MCAST_ET =       0x23,   /* multicast error terminate */
 328         FC_RJT_PRLI_REQ =       0x24,   /* process login required */
 329         FC_RJT_INVL_ATT =       0x25,   /* invalid attachment */
 330         FC_RJT_VENDOR =         0xff,   /* vendor specific reject */
 331 };
 332
 333 /* default timeout values */
 334
 335 #define FC_DEF_E_D_TOV  2000UL
 336 #define FC_DEF_R_A_TOV  10000UL
 337
 338 #endif /* _FC_FS_H_ */