1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2016 Avago Technologies. All rights reserved.
4 */
5
6/*
7 * This file contains definitions relative to FC-NVME-2 r1.08
8 * (T11-2019-00210-v004).
9 */
10
11#ifndef _NVME_FC_H
12#define _NVME_FC_H 1
13
14#include <uapi/scsi/fc/fc_fs.h>
15
16#define NVME_CMD_FORMAT_ID 0xFD
17#define NVME_CMD_FC_ID FC_TYPE_NVME
18
19/* FC-NVME Cmd IU Flags */
20enum {
21 FCNVME_CMD_FLAGS_DIRMASK = 0x03,
22 FCNVME_CMD_FLAGS_WRITE = (1 << 0),
23 FCNVME_CMD_FLAGS_READ = (1 << 1),
24
25 FCNVME_CMD_FLAGS_PICWP = (1 << 2),
26};
27
28enum {
29 FCNVME_CMD_CAT_MASK = 0x0F,
30 FCNVME_CMD_CAT_ADMINQ = 0x01,
31 FCNVME_CMD_CAT_CSSMASK = 0x07,
32 FCNVME_CMD_CAT_CSSFLAG = 0x08,
33};
34
35static inline __u8 fccmnd_set_cat_admin(__u8 rsv_cat)
36{
37 return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_ADMINQ;
38}
39
40static inline __u8 fccmnd_set_cat_css(__u8 rsv_cat, __u8 css)
41{
42 return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_CSSFLAG |
43 (css & FCNVME_CMD_CAT_CSSMASK);
44}
45
46struct nvme_fc_cmd_iu {
47 __u8 format_id;
48 __u8 fc_id;
49 __be16 iu_len;
50 __u8 rsvd4[2];
51 __u8 rsv_cat;
52 __u8 flags;
53 __be64 connection_id;
54 __be32 csn;
55 __be32 data_len;
56 struct nvme_command sqe;
57 __u8 dps;
58 __u8 lbads;
59 __be16 ms;
60 __be32 rsvd92;
61};
62
63#define NVME_FC_SIZEOF_ZEROS_RSP 12
64
65enum {
66 FCNVME_SC_SUCCESS = 0,
67 FCNVME_SC_INVALID_FIELD = 1,
68 /* reserved 2 */
69 FCNVME_SC_ILL_CONN_PARAMS = 3,
70};
71
72struct nvme_fc_ersp_iu {
73 __u8 ersp_result;
74 __u8 rsvd1;
75 __be16 iu_len;
76 __be32 rsn;
77 __be32 xfrd_len;
78 __be32 rsvd12;
79 struct nvme_completion cqe;
80 /* for now - no additional payload */
81};
82
83
84#define FCNVME_NVME_SR_OPCODE 0x01
85#define FCNVME_NVME_SR_RSP_OPCODE 0x02
86
87struct nvme_fc_nvme_sr_iu {
88 __u8 fc_id;
89 __u8 opcode;
90 __u8 rsvd2;
91 __u8 retry_rctl;
92 __be32 rsvd4;
93};
94
95
96enum {
97 FCNVME_SRSTAT_ACC = 0x0,
98 /* reserved 0x1 */
99 /* reserved 0x2 */
100 FCNVME_SRSTAT_LOGICAL_ERR = 0x3,
101 FCNVME_SRSTAT_INV_QUALIF = 0x4,
102 FCNVME_SRSTAT_UNABL2PERFORM = 0x9,
103};
104
105struct nvme_fc_nvme_sr_rsp_iu {
106 __u8 fc_id;
107 __u8 opcode;
108 __u8 rsvd2;
109 __u8 status;
110 __be32 rsvd4;
111};
112
113
114/* FC-NVME Link Services - LS cmd values (w0 bits 31:24) */
115enum {
116 FCNVME_LS_RSVD = 0,
117 FCNVME_LS_RJT = 1,
118 FCNVME_LS_ACC = 2,
119 FCNVME_LS_CREATE_ASSOCIATION = 3, /* Create Association */
120 FCNVME_LS_CREATE_CONNECTION = 4, /* Create I/O Connection */
121 FCNVME_LS_DISCONNECT_ASSOC = 5, /* Disconnect Association */
122 FCNVME_LS_DISCONNECT_CONN = 6, /* Disconnect Connection */
123};
124
125/* FC-NVME Link Service Descriptors */
126enum {
127 FCNVME_LSDESC_RSVD = 0x0,
128 FCNVME_LSDESC_RQST = 0x1,
129 FCNVME_LSDESC_RJT = 0x2,
130 FCNVME_LSDESC_CREATE_ASSOC_CMD = 0x3,
131 FCNVME_LSDESC_CREATE_CONN_CMD = 0x4,
132 FCNVME_LSDESC_DISCONN_CMD = 0x5,
133 FCNVME_LSDESC_CONN_ID = 0x6,
134 FCNVME_LSDESC_ASSOC_ID = 0x7,
135};
136
137
138/* ********** start of Link Service Descriptors ********** */
139
140
141/*
142 * fills in length of a descriptor. Struture minus descriptor header
143 */
144static inline __be32 fcnvme_lsdesc_len(size_t sz)
145{
146 return cpu_to_be32(sz - (2 * sizeof(u32)));
147}
148
149struct fcnvme_ls_rqst_w0 {
150 u8 ls_cmd; /* FCNVME_LS_xxx */
151 u8 zeros[3];
152};
153
154/* FCNVME_LSDESC_RQST */
155struct fcnvme_lsdesc_rqst {
156 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
157 __be32 desc_len;
158 struct fcnvme_ls_rqst_w0 w0;
159 __be32 rsvd12;
160};
161
162/* FC-NVME LS RJT reason_code values */
163enum fcnvme_ls_rjt_reason {
164 FCNVME_RJT_RC_NONE = 0,
165 /* no reason - not to be sent */
166
167 FCNVME_RJT_RC_INVAL = 0x01,
168 /* invalid NVMe_LS command code */
169
170 FCNVME_RJT_RC_LOGIC = 0x03,
171 /* logical error */
172
173 FCNVME_RJT_RC_UNAB = 0x09,
174 /* unable to perform command request */
175
176 FCNVME_RJT_RC_UNSUP = 0x0b,
177 /* command not supported */
178
179 FCNVME_RJT_RC_INV_ASSOC = 0x40,
180 /* Invalid Association ID */
181
182 FCNVME_RJT_RC_INV_CONN = 0x41,
183 /* Invalid Connection ID */
184
185 FCNVME_RJT_RC_INV_PARAM = 0x42,
186 /* Invalid Parameters */
187
188 FCNVME_RJT_RC_INSUF_RES = 0x43,
189 /* Insufficient Resources */
190
191 FCNVME_RJT_RC_VENDOR = 0xff,
192 /* vendor specific error */
193};
194
195/* FC-NVME LS RJT reason_explanation values */
196enum fcnvme_ls_rjt_explan {
197 FCNVME_RJT_EXP_NONE = 0x00,
198 /* No additional explanation */
199
200 FCNVME_RJT_EXP_OXID_RXID = 0x17,
201 /* invalid OX_ID-RX_ID combination */
202
203 FCNVME_RJT_EXP_UNAB_DATA = 0x2a,
204 /* unable to supply requested data */
205
206 FCNVME_RJT_EXP_INV_LEN = 0x2d,
207 /* Invalid payload length */
208
209 FCNVME_RJT_EXP_INV_ERSP_RAT = 0x40,
210 /* Invalid NVMe_ERSP Ratio */
211
212 FCNVME_RJT_EXP_INV_CTLR_ID = 0x41,
213 /* Invalid Controller ID */
214
215 FCNVME_RJT_EXP_INV_QUEUE_ID = 0x42,
216 /* Invalid Queue ID */
217
218 FCNVME_RJT_EXP_INV_SQSIZE = 0x43,
219 /* Invalid Submission Queue Size */
220
221 FCNVME_RJT_EXP_INV_HOSTID = 0x44,
222 /* Invalid HOST ID */
223
224 FCNVME_RJT_EXP_INV_HOSTNQN = 0x45,
225 /* Invalid HOSTNQN */
226
227 FCNVME_RJT_EXP_INV_SUBNQN = 0x46,
228 /* Invalid SUBNQN */
229};
230
231/* FCNVME_LSDESC_RJT */
232struct fcnvme_lsdesc_rjt {
233 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
234 __be32 desc_len;
235 u8 rsvd8;
236
237 /*
238 * Reject reason and explanaction codes are generic
239 * to ELs's from LS-3.
240 */
241 u8 reason_code; /* fcnvme_ls_rjt_reason */
242 u8 reason_explanation; /* fcnvme_ls_rjt_explan */
243
244 u8 vendor;
245 __be32 rsvd12;
246};
247
248
249#define FCNVME_ASSOC_HOSTNQN_LEN 256
250#define FCNVME_ASSOC_SUBNQN_LEN 256
251
252/* FCNVME_LSDESC_CREATE_ASSOC_CMD */
253struct fcnvme_lsdesc_cr_assoc_cmd {
254 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
255 __be32 desc_len;
256 __be16 ersp_ratio;
257 __be16 rsvd10;
258 __be32 rsvd12[9];
259 __be16 cntlid;
260 __be16 sqsize;
261 __be32 rsvd52;
262 uuid_t hostid;
263 u8 hostnqn[FCNVME_ASSOC_HOSTNQN_LEN];
264 u8 subnqn[FCNVME_ASSOC_SUBNQN_LEN];
265 __be32 rsvd584[108]; /* pad to 1016 bytes,
266 * which makes overall LS rqst
267 * payload 1024 bytes
268 */
269};
270
271#define FCNVME_LSDESC_CRA_CMD_DESC_MINLEN \
272 offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, rsvd584)
273
274#define FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN \
275 (FCNVME_LSDESC_CRA_CMD_DESC_MINLEN - \
276 offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, ersp_ratio))
277
278
279
280/* FCNVME_LSDESC_CREATE_CONN_CMD */
281struct fcnvme_lsdesc_cr_conn_cmd {
282 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
283 __be32 desc_len;
284 __be16 ersp_ratio;
285 __be16 rsvd10;
286 __be32 rsvd12[9];
287 __be16 qid;
288 __be16 sqsize;
289 __be32 rsvd52;
290};
291
292/* FCNVME_LSDESC_DISCONN_CMD */
293struct fcnvme_lsdesc_disconn_cmd {
294 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
295 __be32 desc_len;
296 __be32 rsvd8[4];
297};
298
299/* FCNVME_LSDESC_CONN_ID */
300struct fcnvme_lsdesc_conn_id {
301 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
302 __be32 desc_len;
303 __be64 connection_id;
304};
305
306/* FCNVME_LSDESC_ASSOC_ID */
307struct fcnvme_lsdesc_assoc_id {
308 __be32 desc_tag; /* FCNVME_LSDESC_xxx */
309 __be32 desc_len;
310 __be64 association_id;
311};
312
313/* r_ctl values */
314enum {
315 FCNVME_RS_RCTL_CMND = 0x6,
316 FCNVME_RS_RCTL_DATA = 0x1,
317 FCNVME_RS_RCTL_CONF = 0x3,
318 FCNVME_RS_RCTL_SR = 0x9,
319 FCNVME_RS_RCTL_XFER_RDY = 0x5,
320 FCNVME_RS_RCTL_RSP = 0x7,
321 FCNVME_RS_RCTL_ERSP = 0x8,
322 FCNVME_RS_RCTL_SR_RSP = 0xA,
323};
324
325
326/* ********** start of Link Services ********** */
327
328
329/* FCNVME_LS_RJT */
330struct fcnvme_ls_rjt {
331 struct fcnvme_ls_rqst_w0 w0;
332 __be32 desc_list_len;
333 struct fcnvme_lsdesc_rqst rqst;
334 struct fcnvme_lsdesc_rjt rjt;
335};
336
337/* FCNVME_LS_ACC */
338struct fcnvme_ls_acc_hdr {
339 struct fcnvme_ls_rqst_w0 w0;
340 __be32 desc_list_len;
341 struct fcnvme_lsdesc_rqst rqst;
342 /*
343 * Followed by cmd-specific ACCEPT descriptors, see xxx_acc
344 * definitions below
345 */
346};
347
348/* FCNVME_LS_CREATE_ASSOCIATION */
349struct fcnvme_ls_cr_assoc_rqst {
350 struct fcnvme_ls_rqst_w0 w0;
351 __be32 desc_list_len;
352 struct fcnvme_lsdesc_cr_assoc_cmd assoc_cmd;
353};
354
355#define FCNVME_LSDESC_CRA_RQST_MINLEN \
356 (offsetof(struct fcnvme_ls_cr_assoc_rqst, assoc_cmd) + \
357 FCNVME_LSDESC_CRA_CMD_DESC_MINLEN)
358
359#define FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN \
360 FCNVME_LSDESC_CRA_CMD_DESC_MINLEN
361
362
363struct fcnvme_ls_cr_assoc_acc {
364 struct fcnvme_ls_acc_hdr hdr;
365 struct fcnvme_lsdesc_assoc_id associd;
366 struct fcnvme_lsdesc_conn_id connectid;
367};
368
369
370/* FCNVME_LS_CREATE_CONNECTION */
371struct fcnvme_ls_cr_conn_rqst {
372 struct fcnvme_ls_rqst_w0 w0;
373 __be32 desc_list_len;
374 struct fcnvme_lsdesc_assoc_id associd;
375 struct fcnvme_lsdesc_cr_conn_cmd connect_cmd;
376};
377
378struct fcnvme_ls_cr_conn_acc {
379 struct fcnvme_ls_acc_hdr hdr;
380 struct fcnvme_lsdesc_conn_id connectid;
381};
382
383/* FCNVME_LS_DISCONNECT_ASSOC */
384struct fcnvme_ls_disconnect_assoc_rqst {
385 struct fcnvme_ls_rqst_w0 w0;
386 __be32 desc_list_len;
387 struct fcnvme_lsdesc_assoc_id associd;
388 struct fcnvme_lsdesc_disconn_cmd discon_cmd;
389};
390
391struct fcnvme_ls_disconnect_assoc_acc {
392 struct fcnvme_ls_acc_hdr hdr;
393};
394
395
396/* FCNVME_LS_DISCONNECT_CONN */
397struct fcnvme_ls_disconnect_conn_rqst {
398 struct fcnvme_ls_rqst_w0 w0;
399 __be32 desc_list_len;
400 struct fcnvme_lsdesc_assoc_id associd;
401 struct fcnvme_lsdesc_conn_id connectid;
402};
403
404struct fcnvme_ls_disconnect_conn_acc {
405 struct fcnvme_ls_acc_hdr hdr;
406};
407
408
409/*
410 * Default R_A_TOV is pulled in from fc_fs.h but needs conversion
411 * from ms to seconds for our use.
412 */
413#define FC_TWO_TIMES_R_A_TOV (2 * (FC_DEF_R_A_TOV / 1000))
414#define NVME_FC_LS_TIMEOUT_SEC FC_TWO_TIMES_R_A_TOV
415#define NVME_FC_TGTOP_TIMEOUT_SEC FC_TWO_TIMES_R_A_TOV
416
417/*
418 * TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
419 * the string is allowed to be specified with or without a "0x" prefix
420 * infront of the <16hexdigits>. Without is considered the "min" string
421 * and with is considered the "max" string. The hexdigits may be upper
422 * or lower case.
423 * Note: FC-NVME-2 standard requires a "0x" prefix.
424 */
425#define NVME_FC_TRADDR_NNLEN 3 /* "?n-" */
426#define NVME_FC_TRADDR_OXNNLEN 5 /* "?n-0x" */
427#define NVME_FC_TRADDR_HEXNAMELEN 16
428#define NVME_FC_TRADDR_MINLENGTH \
429 (2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
430#define NVME_FC_TRADDR_MAXLENGTH \
431 (2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
432#define NVME_FC_TRADDR_MIN_PN_OFFSET \
433 (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
434#define NVME_FC_TRADDR_MAX_PN_OFFSET \
435 (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
436
437
438#endif /* _NVME_FC_H */
439

source code of linux/include/linux/nvme-fc.h