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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 * 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 */
21struct 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 */
54enum 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 */
141enum 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 */
174enum 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 */
236struct 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 */
250struct 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 */
261enum 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 */
274enum 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 */
283struct 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 */
293enum 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_ */