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TOMOYO Linux Cross Reference
Linux/include/uapi/scsi/fc/fc_fs.h

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  1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2 /*
  3  * Copyright(c) 2007 Intel Corporation. All rights reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or modify it
  6  * under the terms and conditions of the GNU General Public License,
  7  * version 2, as published by the Free Software Foundation.
  8  *
  9  * This program is distributed in the hope it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 12  * more details.
 13  *
 14  * You should have received a copy of the GNU General Public License along with
 15  * this program; if not, write to the Free Software Foundation, Inc.,
 16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 17  *
 18  * Maintained at www.Open-FCoE.org
 19  */
 20 
 21 #ifndef _FC_FS_H_
 22 #define _FC_FS_H_
 23 
 24 #include <linux/types.h>
 25 
 26 /*
 27  * Fibre Channel Framing and Signalling definitions.
 28  * From T11 FC-FS-2 Rev 0.90 - 9 August 2005.
 29  */
 30 
 31 /*
 32  * Frame header
 33  */
 34 struct fc_frame_header {
 35         __u8          fh_r_ctl; /* routing control */
 36         __u8          fh_d_id[3];       /* Destination ID */
 37 
 38         __u8          fh_cs_ctl;        /* class of service control / pri */
 39         __u8          fh_s_id[3];       /* Source ID */
 40 
 41         __u8          fh_type;          /* see enum fc_fh_type below */
 42         __u8          fh_f_ctl[3];      /* frame control */
 43 
 44         __u8          fh_seq_id;        /* sequence ID */
 45         __u8          fh_df_ctl;        /* data field control */
 46         __be16        fh_seq_cnt;       /* sequence count */
 47 
 48         __be16        fh_ox_id;         /* originator exchange ID */
 49         __be16        fh_rx_id;         /* responder exchange ID */
 50         __be32        fh_parm_offset;   /* parameter or relative offset */
 51 };
 52 
 53 #define FC_FRAME_HEADER_LEN 24  /* expected length of structure */
 54 
 55 #define FC_MAX_PAYLOAD  2112U           /* max payload length in bytes */
 56 #define FC_MIN_MAX_PAYLOAD  256U        /* lower limit on max payload */
 57 
 58 #define FC_MAX_FRAME    (FC_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
 59 #define FC_MIN_MAX_FRAME (FC_MIN_MAX_PAYLOAD + FC_FRAME_HEADER_LEN)
 60 
 61 /*
 62  * fh_r_ctl - Routing control definitions.
 63  */
 64     /*
 65      * FC-4 device_data.
 66      */
 67 enum fc_rctl {
 68         FC_RCTL_DD_UNCAT = 0x00,        /* uncategorized information */
 69         FC_RCTL_DD_SOL_DATA = 0x01,     /* solicited data */
 70         FC_RCTL_DD_UNSOL_CTL = 0x02,    /* unsolicited control */
 71         FC_RCTL_DD_SOL_CTL = 0x03,      /* solicited control or reply */
 72         FC_RCTL_DD_UNSOL_DATA = 0x04,   /* unsolicited data */
 73         FC_RCTL_DD_DATA_DESC = 0x05,    /* data descriptor */
 74         FC_RCTL_DD_UNSOL_CMD = 0x06,    /* unsolicited command */
 75         FC_RCTL_DD_CMD_STATUS = 0x07,   /* command status */
 76 
 77 #define FC_RCTL_ILS_REQ FC_RCTL_DD_UNSOL_CTL    /* ILS request */
 78 #define FC_RCTL_ILS_REP FC_RCTL_DD_SOL_CTL      /* ILS reply */
 79 
 80         /*
 81          * Extended Link_Data
 82          */
 83         FC_RCTL_ELS_REQ = 0x22, /* extended link services request */
 84         FC_RCTL_ELS_REP = 0x23, /* extended link services reply */
 85         FC_RCTL_ELS4_REQ = 0x32, /* FC-4 ELS request */
 86         FC_RCTL_ELS4_REP = 0x33, /* FC-4 ELS reply */
 87         /*
 88          * Optional Extended Headers
 89          */
 90         FC_RCTL_VFTH = 0x50,    /* virtual fabric tagging header */
 91         FC_RCTL_IFRH = 0x51,    /* inter-fabric routing header */
 92         FC_RCTL_ENCH = 0x52,    /* encapsulation header */
 93         /*
 94          * Basic Link Services fh_r_ctl values.
 95          */
 96         FC_RCTL_BA_NOP = 0x80,  /* basic link service NOP */
 97         FC_RCTL_BA_ABTS = 0x81, /* basic link service abort */
 98         FC_RCTL_BA_RMC = 0x82,  /* remove connection */
 99         FC_RCTL_BA_ACC = 0x84,  /* basic accept */
100         FC_RCTL_BA_RJT = 0x85,  /* basic reject */
101         FC_RCTL_BA_PRMT = 0x86, /* dedicated connection preempted */
102         /*
103          * Link Control Information.
104          */
105         FC_RCTL_ACK_1 = 0xc0,   /* acknowledge_1 */
106         FC_RCTL_ACK_0 = 0xc1,   /* acknowledge_0 */
107         FC_RCTL_P_RJT = 0xc2,   /* port reject */
108         FC_RCTL_F_RJT = 0xc3,   /* fabric reject */
109         FC_RCTL_P_BSY = 0xc4,   /* port busy */
110         FC_RCTL_F_BSY = 0xc5,   /* fabric busy to data frame */
111         FC_RCTL_F_BSYL = 0xc6,  /* fabric busy to link control frame */
112         FC_RCTL_LCR = 0xc7,     /* link credit reset */
113         FC_RCTL_END = 0xc9,     /* end */
114 };
115                                     /* incomplete list of definitions */
116 
117 /*
118  * R_CTL names initializer.
119  * Please keep this matching the above definitions.
120  */
121 #define FC_RCTL_NAMES_INIT { \
122         [FC_RCTL_DD_UNCAT] =            "uncat",                        \
123         [FC_RCTL_DD_SOL_DATA] =         "sol data",                     \
124         [FC_RCTL_DD_UNSOL_CTL] =        "unsol ctl",                    \
125         [FC_RCTL_DD_SOL_CTL] =          "sol ctl/reply",                \
126         [FC_RCTL_DD_UNSOL_DATA] =       "unsol data",                   \
127         [FC_RCTL_DD_DATA_DESC] =        "data desc",                    \
128         [FC_RCTL_DD_UNSOL_CMD] =        "unsol cmd",                    \
129         [FC_RCTL_DD_CMD_STATUS] =       "cmd status",                   \
130         [FC_RCTL_ELS_REQ] =             "ELS req",                      \
131         [FC_RCTL_ELS_REP] =             "ELS rep",                      \
132         [FC_RCTL_ELS4_REQ] =            "FC-4 ELS req",                 \
133         [FC_RCTL_ELS4_REP] =            "FC-4 ELS rep",                 \
134         [FC_RCTL_BA_NOP] =              "BLS NOP",                      \
135         [FC_RCTL_BA_ABTS] =             "BLS abort",                    \
136         [FC_RCTL_BA_RMC] =              "BLS remove connection",        \
137         [FC_RCTL_BA_ACC] =              "BLS accept",                   \
138         [FC_RCTL_BA_RJT] =              "BLS reject",                   \
139         [FC_RCTL_BA_PRMT] =             "BLS dedicated connection preempted", \
140         [FC_RCTL_ACK_1] =               "LC ACK_1",                     \
141         [FC_RCTL_ACK_0] =               "LC ACK_0",                     \
142         [FC_RCTL_P_RJT] =               "LC port reject",               \
143         [FC_RCTL_F_RJT] =               "LC fabric reject",             \
144         [FC_RCTL_P_BSY] =               "LC port busy",                 \
145         [FC_RCTL_F_BSY] =               "LC fabric busy to data frame", \
146         [FC_RCTL_F_BSYL] =              "LC fabric busy to link control frame",\
147         [FC_RCTL_LCR] =                 "LC link credit reset",         \
148         [FC_RCTL_END] =                 "LC end",                       \
149 }
150 
151 /*
152  * Well-known fabric addresses.
153  */
154 enum fc_well_known_fid {
155         FC_FID_NONE =           0x000000,       /* No destination */
156         FC_FID_BCAST =          0xffffff,       /* broadcast */
157         FC_FID_FLOGI =          0xfffffe,       /* fabric login */
158         FC_FID_FCTRL =          0xfffffd,       /* fabric controller */
159         FC_FID_DIR_SERV =       0xfffffc,       /* directory server */
160         FC_FID_TIME_SERV =      0xfffffb,       /* time server */
161         FC_FID_MGMT_SERV =      0xfffffa,       /* management server */
162         FC_FID_QOS =            0xfffff9,       /* QoS Facilitator */
163         FC_FID_ALIASES =        0xfffff8,       /* alias server (FC-PH2) */
164         FC_FID_SEC_KEY =        0xfffff7,       /* Security key dist. server */
165         FC_FID_CLOCK =          0xfffff6,       /* clock synch server */
166         FC_FID_MCAST_SERV =     0xfffff5,       /* multicast server */
167 };
168 
169 #define FC_FID_WELL_KNOWN_MAX   0xffffff /* highest well-known fabric ID */
170 #define FC_FID_WELL_KNOWN_BASE  0xfffff5 /* start of well-known fabric ID */
171 
172 /*
173  * Other well-known addresses, outside the above contiguous range.
174  */
175 #define FC_FID_DOM_MGR          0xfffc00        /* domain manager base */
176 
177 /*
178  * Fabric ID bytes.
179  */
180 #define FC_FID_DOMAIN           0
181 #define FC_FID_PORT             1
182 #define FC_FID_LINK             2
183 
184 /*
185  * fh_type codes
186  */
187 enum fc_fh_type {
188         FC_TYPE_BLS =   0x00,   /* basic link service */
189         FC_TYPE_ELS =   0x01,   /* extended link service */
190         FC_TYPE_IP =    0x05,   /* IP over FC, RFC 4338 */
191         FC_TYPE_FCP =   0x08,   /* SCSI FCP */
192         FC_TYPE_CT =    0x20,   /* Fibre Channel Services (FC-CT) */
193         FC_TYPE_ILS =   0x22,   /* internal link service */
194         FC_TYPE_NVME =  0x28,   /* FC-NVME */
195 };
196 
197 /*
198  * FC_TYPE names initializer.
199  * Please keep this matching the above definitions.
200  */
201 #define FC_TYPE_NAMES_INIT {                            \
202         [FC_TYPE_BLS] =         "BLS",                  \
203         [FC_TYPE_ELS] =         "ELS",                  \
204         [FC_TYPE_IP] =          "IP",                   \
205         [FC_TYPE_FCP] =         "FCP",                  \
206         [FC_TYPE_CT] =          "CT",                   \
207         [FC_TYPE_ILS] =         "ILS",                  \
208         [FC_TYPE_NVME] =        "NVME",                 \
209 }
210 
211 /*
212  * Exchange IDs.
213  */
214 #define FC_XID_UNKNOWN  0xffff  /* unknown exchange ID */
215 #define FC_XID_MIN      0x0     /* supported min exchange ID */
216 #define FC_XID_MAX      0xfffe  /* supported max exchange ID */
217 
218 /*
219  * fh_f_ctl - Frame control flags.
220  */
221 #define FC_FC_EX_CTX    (1 << 23)       /* sent by responder to exchange */
222 #define FC_FC_SEQ_CTX   (1 << 22)       /* sent by responder to sequence */
223 #define FC_FC_FIRST_SEQ (1 << 21)       /* first sequence of this exchange */
224 #define FC_FC_LAST_SEQ  (1 << 20)       /* last sequence of this exchange */
225 #define FC_FC_END_SEQ   (1 << 19)       /* last frame of sequence */
226 #define FC_FC_END_CONN  (1 << 18)       /* end of class 1 connection pending */
227 #define FC_FC_RES_B17   (1 << 17)       /* reserved */
228 #define FC_FC_SEQ_INIT  (1 << 16)       /* transfer of sequence initiative */
229 #define FC_FC_X_ID_REASS (1 << 15)      /* exchange ID has been changed */
230 #define FC_FC_X_ID_INVAL (1 << 14)      /* exchange ID invalidated */
231 
232 #define FC_FC_ACK_1     (1 << 12)       /* 13:12 = 1: ACK_1 expected */
233 #define FC_FC_ACK_N     (2 << 12)       /* 13:12 = 2: ACK_N expected */
234 #define FC_FC_ACK_0     (3 << 12)       /* 13:12 = 3: ACK_0 expected */
235 
236 #define FC_FC_RES_B11   (1 << 11)       /* reserved */
237 #define FC_FC_RES_B10   (1 << 10)       /* reserved */
238 #define FC_FC_RETX_SEQ  (1 << 9)        /* retransmitted sequence */
239 #define FC_FC_UNI_TX    (1 << 8)        /* unidirectional transmit (class 1) */
240 #define FC_FC_CONT_SEQ(i) ((i) << 6)
241 #define FC_FC_ABT_SEQ(i) ((i) << 4)
242 #define FC_FC_REL_OFF   (1 << 3)        /* parameter is relative offset */
243 #define FC_FC_RES2      (1 << 2)        /* reserved */
244 #define FC_FC_FILL(i)   ((i) & 3)       /* 1:0: bytes of trailing fill */
245 
246 /*
247  * BA_ACC payload.
248  */
249 struct fc_ba_acc {
250         __u8            ba_seq_id_val;  /* SEQ_ID validity */
251 #define FC_BA_SEQ_ID_VAL 0x80
252         __u8            ba_seq_id;      /* SEQ_ID of seq last deliverable */
253         __u8            ba_resvd[2];    /* reserved */
254         __be16          ba_ox_id;       /* OX_ID for aborted seq or exch */
255         __be16          ba_rx_id;       /* RX_ID for aborted seq or exch */
256         __be16          ba_low_seq_cnt; /* low SEQ_CNT of aborted seq */
257         __be16          ba_high_seq_cnt; /* high SEQ_CNT of aborted seq */
258 };
259 
260 /*
261  * BA_RJT: Basic Reject payload.
262  */
263 struct fc_ba_rjt {
264         __u8            br_resvd;       /* reserved */
265         __u8            br_reason;      /* reason code */
266         __u8            br_explan;      /* reason explanation */
267         __u8            br_vendor;      /* vendor unique code */
268 };
269 
270 /*
271  * BA_RJT reason codes.
272  * From FS-2.
273  */
274 enum fc_ba_rjt_reason {
275         FC_BA_RJT_NONE =        0,      /* in software this means no reject */
276         FC_BA_RJT_INVL_CMD =    0x01,   /* invalid command code */
277         FC_BA_RJT_LOG_ERR =     0x03,   /* logical error */
278         FC_BA_RJT_LOG_BUSY =    0x05,   /* logical busy */
279         FC_BA_RJT_PROTO_ERR =   0x07,   /* protocol error */
280         FC_BA_RJT_UNABLE =      0x09,   /* unable to perform request */
281         FC_BA_RJT_VENDOR =      0xff,   /* vendor-specific (see br_vendor) */
282 };
283 
284 /*
285  * BA_RJT reason code explanations.
286  */
287 enum fc_ba_rjt_explan {
288         FC_BA_RJT_EXP_NONE =    0x00,   /* no additional expanation */
289         FC_BA_RJT_INV_XID =     0x03,   /* invalid OX_ID-RX_ID combination */
290         FC_BA_RJT_ABT =         0x05,   /* sequence aborted, no seq info */
291 };
292 
293 /*
294  * P_RJT or F_RJT: Port Reject or Fabric Reject parameter field.
295  */
296 struct fc_pf_rjt {
297         __u8            rj_action;      /* reserved */
298         __u8            rj_reason;      /* reason code */
299         __u8            rj_resvd;       /* reserved */
300         __u8            rj_vendor;      /* vendor unique code */
301 };
302 
303 /*
304  * P_RJT and F_RJT reject reason codes.
305  */
306 enum fc_pf_rjt_reason {
307         FC_RJT_NONE =           0,      /* non-reject (reserved by standard) */
308         FC_RJT_INVL_DID =       0x01,   /* invalid destination ID */
309         FC_RJT_INVL_SID =       0x02,   /* invalid source ID */
310         FC_RJT_P_UNAV_T =       0x03,   /* port unavailable, temporary */
311         FC_RJT_P_UNAV =         0x04,   /* port unavailable, permanent */
312         FC_RJT_CLS_UNSUP =      0x05,   /* class not supported */
313         FC_RJT_DEL_USAGE =      0x06,   /* delimiter usage error */
314         FC_RJT_TYPE_UNSUP =     0x07,   /* type not supported */
315         FC_RJT_LINK_CTL =       0x08,   /* invalid link control */
316         FC_RJT_R_CTL =          0x09,   /* invalid R_CTL field */
317         FC_RJT_F_CTL =          0x0a,   /* invalid F_CTL field */
318         FC_RJT_OX_ID =          0x0b,   /* invalid originator exchange ID */
319         FC_RJT_RX_ID =          0x0c,   /* invalid responder exchange ID */
320         FC_RJT_SEQ_ID =         0x0d,   /* invalid sequence ID */
321         FC_RJT_DF_CTL =         0x0e,   /* invalid DF_CTL field */
322         FC_RJT_SEQ_CNT =        0x0f,   /* invalid SEQ_CNT field */
323         FC_RJT_PARAM =          0x10,   /* invalid parameter field */
324         FC_RJT_EXCH_ERR =       0x11,   /* exchange error */
325         FC_RJT_PROTO =          0x12,   /* protocol error */
326         FC_RJT_LEN =            0x13,   /* incorrect length */
327         FC_RJT_UNEXP_ACK =      0x14,   /* unexpected ACK */
328         FC_RJT_FAB_CLASS =      0x15,   /* class unsupported by fabric entity */
329         FC_RJT_LOGI_REQ =       0x16,   /* login required */
330         FC_RJT_SEQ_XS =         0x17,   /* excessive sequences attempted */
331         FC_RJT_EXCH_EST =       0x18,   /* unable to establish exchange */
332         FC_RJT_FAB_UNAV =       0x1a,   /* fabric unavailable */
333         FC_RJT_VC_ID =          0x1b,   /* invalid VC_ID (class 4) */
334         FC_RJT_CS_CTL =         0x1c,   /* invalid CS_CTL field */
335         FC_RJT_INSUF_RES =      0x1d,   /* insuff. resources for VC (Class 4) */
336         FC_RJT_INVL_CLS =       0x1f,   /* invalid class of service */
337         FC_RJT_PREEMT_RJT =     0x20,   /* preemption request rejected */
338         FC_RJT_PREEMT_DIS =     0x21,   /* preemption not enabled */
339         FC_RJT_MCAST_ERR =      0x22,   /* multicast error */
340         FC_RJT_MCAST_ET =       0x23,   /* multicast error terminate */
341         FC_RJT_PRLI_REQ =       0x24,   /* process login required */
342         FC_RJT_INVL_ATT =       0x25,   /* invalid attachment */
343         FC_RJT_VENDOR =         0xff,   /* vendor specific reject */
344 };
345 
346 /* default timeout values */
347 
348 #define FC_DEF_E_D_TOV  2000UL
349 #define FC_DEF_R_A_TOV  10000UL
350 
351 #endif /* _FC_FS_H_ */
352 

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