summaryrefslogtreecommitdiff
path: root/include/linux/nvme-fc.h
blob: e8c30b39bb27f72ac73a3ed0dc6d3aad46cfbe86 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2016 Avago Technologies.  All rights reserved.
 */

/*
 * This file contains definitions relative to FC-NVME-2 r1.06
 * (T11-2019-00210-v001).
 */

#ifndef _NVME_FC_H
#define _NVME_FC_H 1

#include <uapi/scsi/fc/fc_fs.h>

#define NVME_CMD_FORMAT_ID		0xFD
#define NVME_CMD_FC_ID			FC_TYPE_NVME

/* FC-NVME Cmd IU Flags */
enum {
	FCNVME_CMD_FLAGS_DIRMASK	= 0x03,
	FCNVME_CMD_FLAGS_WRITE		= (1 << 0),
	FCNVME_CMD_FLAGS_READ		= (1 << 1),

	FCNVME_CMD_FLAGS_PICWP		= (1 << 2),
};

enum {
	FCNVME_CMD_CAT_MASK		= 0x0F,
	FCNVME_CMD_CAT_ADMINQ		= 0x01,
	FCNVME_CMD_CAT_CSSMASK		= 0x07,
	FCNVME_CMD_CAT_CSSFLAG		= 0x08,
};

static inline __u8 fccmnd_set_cat_admin(__u8 rsv_cat)
{
	return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_ADMINQ;
}

static inline __u8 fccmnd_set_cat_css(__u8 rsv_cat, __u8 css)
{
	return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_CSSFLAG |
		(css & FCNVME_CMD_CAT_CSSMASK);
}

struct nvme_fc_cmd_iu {
	__u8			format_id;
	__u8			fc_id;
	__be16			iu_len;
	__u8			rsvd4[2];
	__u8			rsv_cat;
	__u8			flags;
	__be64			connection_id;
	__be32			csn;
	__be32			data_len;
	struct nvme_command	sqe;
	__u8			dps;
	__u8			lbads;
	__be16			ms;
	__be32			rsvd92;
};

#define NVME_FC_SIZEOF_ZEROS_RSP	12

enum {
	FCNVME_SC_SUCCESS		= 0,
	FCNVME_SC_INVALID_FIELD		= 1,
	/* reserved			  2 */
	FCNVME_SC_ILL_CONN_PARAMS	= 3,
};

struct nvme_fc_ersp_iu {
	__u8			ersp_result;
	__u8			rsvd1;
	__be16			iu_len;
	__be32			rsn;
	__be32			xfrd_len;
	__be32			rsvd12;
	struct nvme_completion	cqe;
	/* for now - no additional payload */
};


#define FCNVME_NVME_SR_OPCODE	0x01

struct nvme_fc_nvme_sr_iu {
	__u8			fc_id;
	__u8			opcode;
	__u8			rsvd2;
	__u8			retry_rctl;
	__be32			rsvd4;
};


enum {
	FCNVME_SRSTAT_ACC		= 0x0,
	FCNVME_SRSTAT_INV_FCID		= 0x1,
	/* reserved			  0x2 */
	FCNVME_SRSTAT_LOGICAL_ERR	= 0x3,
	FCNVME_SRSTAT_INV_QUALIF	= 0x4,
	FCNVME_SRSTAT_UNABL2PERFORM	= 0x9,
};

struct nvme_fc_nvme_sr_rsp_iu {
	__u8			fc_id;
	__u8			opcode;
	__u8			rsvd2;
	__u8			status;
	__be32			rsvd4;
};


/* FC-NVME Link Services - LS cmd values (w0 bits 31:24) */
enum {
	FCNVME_LS_RSVD			= 0,
	FCNVME_LS_RJT			= 1,
	FCNVME_LS_ACC			= 2,
	FCNVME_LS_CREATE_ASSOCIATION	= 3,	/* Create Association */
	FCNVME_LS_CREATE_CONNECTION	= 4,	/* Create I/O Connection */
	FCNVME_LS_DISCONNECT_ASSOC	= 5,	/* Disconnect Association */
	FCNVME_LS_DISCONNECT_CONN	= 6,	/* Disconnect Connection */
};

/* FC-NVME Link Service Descriptors */
enum {
	FCNVME_LSDESC_RSVD		= 0x0,
	FCNVME_LSDESC_RQST		= 0x1,
	FCNVME_LSDESC_RJT		= 0x2,
	FCNVME_LSDESC_CREATE_ASSOC_CMD	= 0x3,
	FCNVME_LSDESC_CREATE_CONN_CMD	= 0x4,
	FCNVME_LSDESC_DISCONN_CMD	= 0x5,
	FCNVME_LSDESC_CONN_ID		= 0x6,
	FCNVME_LSDESC_ASSOC_ID		= 0x7,
};


/* ********** start of Link Service Descriptors ********** */


/*
 * fills in length of a descriptor. Struture minus descriptor header
 */
static inline __be32 fcnvme_lsdesc_len(size_t sz)
{
	return cpu_to_be32(sz - (2 * sizeof(u32)));
}

struct fcnvme_ls_rqst_w0 {
	u8	ls_cmd;			/* FCNVME_LS_xxx */
	u8	zeros[3];
};

/* FCNVME_LSDESC_RQST */
struct fcnvme_lsdesc_rqst {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	struct fcnvme_ls_rqst_w0	w0;
	__be32	rsvd12;
};

/* FC-NVME LS RJT reason_code values */
enum fcnvme_ls_rjt_reason {
	FCNVME_RJT_RC_NONE		= 0,
	/* no reason - not to be sent */

	FCNVME_RJT_RC_INVAL		= 0x01,
	/* invalid NVMe_LS command code */

	FCNVME_RJT_RC_LOGIC		= 0x03,
	/* logical error */

	FCNVME_RJT_RC_UNAB		= 0x09,
	/* unable to perform command request */

	FCNVME_RJT_RC_UNSUP		= 0x0b,
	/* command not supported */

	FCNVME_RJT_RC_INV_ASSOC		= 0x40,
	/* Invalid Association ID */

	FCNVME_RJT_RC_INV_CONN		= 0x41,
	/* Invalid Connection ID */

	FCNVME_RJT_RC_INV_PARAM		= 0x42,
	/* Invalid Parameters */

	FCNVME_RJT_RC_INSUF_RES		= 0x43,
	/* Insufficient Resources */

	FCNVME_RJT_RC_VENDOR		= 0xff,
	/* vendor specific error */
};

/* FC-NVME LS RJT reason_explanation values */
enum fcnvme_ls_rjt_explan {
	FCNVME_RJT_EXP_NONE		= 0x00,
	/* No additional explanation */

	FCNVME_RJT_EXP_OXID_RXID	= 0x17,
	/* invalid OX_ID-RX_ID combination */

	FCNVME_RJT_EXP_UNAB_DATA	= 0x2a,
	/* unable to supply requested data */

	FCNVME_RJT_EXP_INV_LEN		= 0x2d,
	/* Invalid payload length */

	FCNVME_RJT_EXP_INV_ERSP_RAT	= 0x40,
	/* Invalid NVMe_ERSP Ratio */

	FCNVME_RJT_EXP_INV_CTLR_ID	= 0x41,
	/* Invalid Controller ID */

	FCNVME_RJT_EXP_INV_QUEUE_ID	= 0x42,
	/* Invalid Queue ID */

	FCNVME_RJT_EXP_INV_SQSIZE	= 0x43,
	/* Invalid Submission Queue Size */

	FCNVME_RJT_EXP_INV_HOSTID	= 0x44,
	/* Invalid HOST ID */

	FCNVME_RJT_EXP_INV_HOSTNQN	= 0x45,
	/* Invalid HOSTNQN */

	FCNVME_RJT_EXP_INV_SUBNQN	= 0x46,
	/* Invalid SUBNQN */
};

/* FCNVME_LSDESC_RJT */
struct fcnvme_lsdesc_rjt {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	u8	rsvd8;

	/*
	 * Reject reason and explanaction codes are generic
	 * to ELs's from LS-3.
	 */
	u8	reason_code;		/* fcnvme_ls_rjt_reason */
	u8	reason_explanation;	/* fcnvme_ls_rjt_explan */

	u8	vendor;
	__be32	rsvd12;
};


#define FCNVME_ASSOC_HOSTNQN_LEN	256
#define FCNVME_ASSOC_SUBNQN_LEN		256

/* FCNVME_LSDESC_CREATE_ASSOC_CMD */
struct fcnvme_lsdesc_cr_assoc_cmd {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	__be16	ersp_ratio;
	__be16	rsvd10;
	__be32	rsvd12[9];
	__be16	cntlid;
	__be16	sqsize;
	__be32	rsvd52;
	uuid_t	hostid;
	u8	hostnqn[FCNVME_ASSOC_HOSTNQN_LEN];
	u8	subnqn[FCNVME_ASSOC_SUBNQN_LEN];
	__be32	rsvd584[108];		/* pad to 1016 bytes,
					 * which makes overall LS rqst
					 * payload 1024 bytes
					 */
};

#define FCNVME_LSDESC_CRA_CMD_DESC_MINLEN	\
		offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, rsvd584)

#define FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN	\
		(FCNVME_LSDESC_CRA_CMD_DESC_MINLEN - \
		 offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, ersp_ratio))



/* FCNVME_LSDESC_CREATE_CONN_CMD */
struct fcnvme_lsdesc_cr_conn_cmd {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	__be16	ersp_ratio;
	__be16	rsvd10;
	__be32	rsvd12[9];
	__be16	qid;
	__be16	sqsize;
	__be32  rsvd52;
};

/* FCNVME_LSDESC_DISCONN_CMD */
struct fcnvme_lsdesc_disconn_cmd {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	__be32	rsvd8[4];
};

/* FCNVME_LSDESC_CONN_ID */
struct fcnvme_lsdesc_conn_id {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	__be64	connection_id;
};

/* FCNVME_LSDESC_ASSOC_ID */
struct fcnvme_lsdesc_assoc_id {
	__be32	desc_tag;		/* FCNVME_LSDESC_xxx */
	__be32	desc_len;
	__be64	association_id;
};

/* r_ctl values */
enum {
	FCNVME_RS_RCTL_CMND		= 0x6,
	FCNVME_RS_RCTL_DATA		= 0x1,
	FCNVME_RS_RCTL_CONF		= 0x3,
	FCNVME_RS_RCTL_SR		= 0x9,
	FCNVME_RS_RCTL_XFER_RDY		= 0x5,
	FCNVME_RS_RCTL_RSP		= 0x7,
	FCNVME_RS_RCTL_ERSP		= 0x8,
	FCNVME_RS_RCTL_SR_RSP		= 0xA,
};


/* ********** start of Link Services ********** */


/* FCNVME_LS_RJT */
struct fcnvme_ls_rjt {
	struct fcnvme_ls_rqst_w0		w0;
	__be32					desc_list_len;
	struct fcnvme_lsdesc_rqst		rqst;
	struct fcnvme_lsdesc_rjt		rjt;
};

/* FCNVME_LS_ACC */
struct fcnvme_ls_acc_hdr {
	struct fcnvme_ls_rqst_w0		w0;
	__be32					desc_list_len;
	struct fcnvme_lsdesc_rqst		rqst;
	/*
	 * Followed by cmd-specific ACCEPT descriptors, see xxx_acc
	 * definitions below
	 */
};

/* FCNVME_LS_CREATE_ASSOCIATION */
struct fcnvme_ls_cr_assoc_rqst {
	struct fcnvme_ls_rqst_w0		w0;
	__be32					desc_list_len;
	struct fcnvme_lsdesc_cr_assoc_cmd	assoc_cmd;
};

#define FCNVME_LSDESC_CRA_RQST_MINLEN	\
		(offsetof(struct fcnvme_ls_cr_assoc_rqst, assoc_cmd) + \
			FCNVME_LSDESC_CRA_CMD_DESC_MINLEN)

#define FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN	\
		FCNVME_LSDESC_CRA_CMD_DESC_MINLEN


struct fcnvme_ls_cr_assoc_acc {
	struct fcnvme_ls_acc_hdr		hdr;
	struct fcnvme_lsdesc_assoc_id		associd;
	struct fcnvme_lsdesc_conn_id		connectid;
};


/* FCNVME_LS_CREATE_CONNECTION */
struct fcnvme_ls_cr_conn_rqst {
	struct fcnvme_ls_rqst_w0		w0;
	__be32					desc_list_len;
	struct fcnvme_lsdesc_assoc_id		associd;
	struct fcnvme_lsdesc_cr_conn_cmd	connect_cmd;
};

struct fcnvme_ls_cr_conn_acc {
	struct fcnvme_ls_acc_hdr		hdr;
	struct fcnvme_lsdesc_conn_id		connectid;
};

/* FCNVME_LS_DISCONNECT_ASSOC */
struct fcnvme_ls_disconnect_assoc_rqst {
	struct fcnvme_ls_rqst_w0		w0;
	__be32					desc_list_len;
	struct fcnvme_lsdesc_assoc_id		associd;
	struct fcnvme_lsdesc_disconn_cmd	discon_cmd;
};

struct fcnvme_ls_disconnect_assoc_acc {
	struct fcnvme_ls_acc_hdr		hdr;
};


/* FCNVME_LS_DISCONNECT_CONN */
struct fcnvme_ls_disconnect_conn_rqst {
	struct fcnvme_ls_rqst_w0		w0;
	__be32					desc_list_len;
	struct fcnvme_lsdesc_assoc_id		associd;
	struct fcnvme_lsdesc_disconn_cmd	connectid;
};

struct fcnvme_ls_disconnect_conn_acc {
	struct fcnvme_ls_acc_hdr		hdr;
};


/*
 * Default R_A_TOV is pulled in from fc_fs.h but needs conversion
 * from ms to seconds for our use.
 */
#define FC_TWO_TIMES_R_A_TOV		(2 * (FC_DEF_R_A_TOV / 1000))
#define NVME_FC_LS_TIMEOUT_SEC		FC_TWO_TIMES_R_A_TOV
#define NVME_FC_TGTOP_TIMEOUT_SEC	FC_TWO_TIMES_R_A_TOV

/*
 * TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
 * the string is allowed to be specified with or without a "0x" prefix
 * infront of the <16hexdigits>.  Without is considered the "min" string
 * and with is considered the "max" string. The hexdigits may be upper
 * or lower case.
 * Note: FC-NVME-2 standard requires a "0x" prefix.
 */
#define NVME_FC_TRADDR_NNLEN		3	/* "?n-" */
#define NVME_FC_TRADDR_OXNNLEN		5	/* "?n-0x" */
#define NVME_FC_TRADDR_HEXNAMELEN	16
#define NVME_FC_TRADDR_MINLENGTH	\
		(2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
#define NVME_FC_TRADDR_MAXLENGTH	\
		(2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
#define NVME_FC_TRADDR_MIN_PN_OFFSET	\
		(NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
#define NVME_FC_TRADDR_MAX_PN_OFFSET	\
		(NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)


#endif /* _NVME_FC_H */