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1 /*
2  * Definitions for the NVM Express interface
3  * Copyright (c) 2011, Intel Corporation.
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 
19 #ifndef _LINUX_NVME_H
20 #define _LINUX_NVME_H
21 
22 #include <linux/types.h>
23 
24 struct nvme_bar {
25 	__u64			cap;	/* Controller Capabilities */
26 	__u32			vs;	/* Version */
27 	__u32			intms;	/* Interrupt Mask Set */
28 	__u32			intmc;	/* Interrupt Mask Clear */
29 	__u32			cc;	/* Controller Configuration */
30 	__u32			rsvd1;	/* Reserved */
31 	__u32			csts;	/* Controller Status */
32 	__u32			rsvd2;	/* Reserved */
33 	__u32			aqa;	/* Admin Queue Attributes */
34 	__u64			asq;	/* Admin SQ Base Address */
35 	__u64			acq;	/* Admin CQ Base Address */
36 };
37 
38 #define NVME_CAP_TIMEOUT(cap)	(((cap) >> 24) & 0xff)
39 #define NVME_CAP_STRIDE(cap)	(((cap) >> 32) & 0xf)
40 
41 enum {
42 	NVME_CC_ENABLE		= 1 << 0,
43 	NVME_CC_CSS_NVM		= 0 << 4,
44 	NVME_CC_MPS_SHIFT	= 7,
45 	NVME_CC_ARB_RR		= 0 << 11,
46 	NVME_CC_ARB_WRRU	= 1 << 11,
47 	NVME_CC_ARB_VS		= 7 << 11,
48 	NVME_CC_SHN_NONE	= 0 << 14,
49 	NVME_CC_SHN_NORMAL	= 1 << 14,
50 	NVME_CC_SHN_ABRUPT	= 2 << 14,
51 	NVME_CC_IOSQES		= 6 << 16,
52 	NVME_CC_IOCQES		= 4 << 20,
53 	NVME_CSTS_RDY		= 1 << 0,
54 	NVME_CSTS_CFS		= 1 << 1,
55 	NVME_CSTS_SHST_NORMAL	= 0 << 2,
56 	NVME_CSTS_SHST_OCCUR	= 1 << 2,
57 	NVME_CSTS_SHST_CMPLT	= 2 << 2,
58 };
59 
60 struct nvme_id_power_state {
61 	__le16			max_power;	/* centiwatts */
62 	__u16			rsvd2;
63 	__le32			entry_lat;	/* microseconds */
64 	__le32			exit_lat;	/* microseconds */
65 	__u8			read_tput;
66 	__u8			read_lat;
67 	__u8			write_tput;
68 	__u8			write_lat;
69 	__u8			rsvd16[16];
70 };
71 
72 #define NVME_VS(major, minor)	(major << 16 | minor)
73 
74 struct nvme_id_ctrl {
75 	__le16			vid;
76 	__le16			ssvid;
77 	char			sn[20];
78 	char			mn[40];
79 	char			fr[8];
80 	__u8			rab;
81 	__u8			ieee[3];
82 	__u8			mic;
83 	__u8			mdts;
84 	__u8			rsvd78[178];
85 	__le16			oacs;
86 	__u8			acl;
87 	__u8			aerl;
88 	__u8			frmw;
89 	__u8			lpa;
90 	__u8			elpe;
91 	__u8			npss;
92 	__u8			rsvd264[248];
93 	__u8			sqes;
94 	__u8			cqes;
95 	__u8			rsvd514[2];
96 	__le32			nn;
97 	__le16			oncs;
98 	__le16			fuses;
99 	__u8			fna;
100 	__u8			vwc;
101 	__le16			awun;
102 	__le16			awupf;
103 	__u8			rsvd530[1518];
104 	struct nvme_id_power_state	psd[32];
105 	__u8			vs[1024];
106 };
107 
108 struct nvme_lbaf {
109 	__le16			ms;
110 	__u8			ds;
111 	__u8			rp;
112 };
113 
114 struct nvme_id_ns {
115 	__le64			nsze;
116 	__le64			ncap;
117 	__le64			nuse;
118 	__u8			nsfeat;
119 	__u8			nlbaf;
120 	__u8			flbas;
121 	__u8			mc;
122 	__u8			dpc;
123 	__u8			dps;
124 	__u8			rsvd30[98];
125 	struct nvme_lbaf	lbaf[16];
126 	__u8			rsvd192[192];
127 	__u8			vs[3712];
128 };
129 
130 enum {
131 	NVME_NS_FEAT_THIN	= 1 << 0,
132 	NVME_LBAF_RP_BEST	= 0,
133 	NVME_LBAF_RP_BETTER	= 1,
134 	NVME_LBAF_RP_GOOD	= 2,
135 	NVME_LBAF_RP_DEGRADED	= 3,
136 };
137 
138 struct nvme_lba_range_type {
139 	__u8			type;
140 	__u8			attributes;
141 	__u8			rsvd2[14];
142 	__u64			slba;
143 	__u64			nlb;
144 	__u8			guid[16];
145 	__u8			rsvd48[16];
146 };
147 
148 enum {
149 	NVME_LBART_TYPE_FS	= 0x01,
150 	NVME_LBART_TYPE_RAID	= 0x02,
151 	NVME_LBART_TYPE_CACHE	= 0x03,
152 	NVME_LBART_TYPE_SWAP	= 0x04,
153 
154 	NVME_LBART_ATTRIB_TEMP	= 1 << 0,
155 	NVME_LBART_ATTRIB_HIDE	= 1 << 1,
156 };
157 
158 /* I/O commands */
159 
160 enum nvme_opcode {
161 	nvme_cmd_flush		= 0x00,
162 	nvme_cmd_write		= 0x01,
163 	nvme_cmd_read		= 0x02,
164 	nvme_cmd_write_uncor	= 0x04,
165 	nvme_cmd_compare	= 0x05,
166 	nvme_cmd_dsm		= 0x09,
167 };
168 
169 struct nvme_common_command {
170 	__u8			opcode;
171 	__u8			flags;
172 	__u16			command_id;
173 	__le32			nsid;
174 	__u32			cdw2[2];
175 	__le64			metadata;
176 	__le64			prp1;
177 	__le64			prp2;
178 	__u32			cdw10[6];
179 };
180 
181 struct nvme_rw_command {
182 	__u8			opcode;
183 	__u8			flags;
184 	__u16			command_id;
185 	__le32			nsid;
186 	__u64			rsvd2;
187 	__le64			metadata;
188 	__le64			prp1;
189 	__le64			prp2;
190 	__le64			slba;
191 	__le16			length;
192 	__le16			control;
193 	__le32			dsmgmt;
194 	__le32			reftag;
195 	__le16			apptag;
196 	__le16			appmask;
197 };
198 
199 enum {
200 	NVME_RW_LR			= 1 << 15,
201 	NVME_RW_FUA			= 1 << 14,
202 	NVME_RW_DSM_FREQ_UNSPEC		= 0,
203 	NVME_RW_DSM_FREQ_TYPICAL	= 1,
204 	NVME_RW_DSM_FREQ_RARE		= 2,
205 	NVME_RW_DSM_FREQ_READS		= 3,
206 	NVME_RW_DSM_FREQ_WRITES		= 4,
207 	NVME_RW_DSM_FREQ_RW		= 5,
208 	NVME_RW_DSM_FREQ_ONCE		= 6,
209 	NVME_RW_DSM_FREQ_PREFETCH	= 7,
210 	NVME_RW_DSM_FREQ_TEMP		= 8,
211 	NVME_RW_DSM_LATENCY_NONE	= 0 << 4,
212 	NVME_RW_DSM_LATENCY_IDLE	= 1 << 4,
213 	NVME_RW_DSM_LATENCY_NORM	= 2 << 4,
214 	NVME_RW_DSM_LATENCY_LOW		= 3 << 4,
215 	NVME_RW_DSM_SEQ_REQ		= 1 << 6,
216 	NVME_RW_DSM_COMPRESSED		= 1 << 7,
217 };
218 
219 /* Admin commands */
220 
221 enum nvme_admin_opcode {
222 	nvme_admin_delete_sq		= 0x00,
223 	nvme_admin_create_sq		= 0x01,
224 	nvme_admin_get_log_page		= 0x02,
225 	nvme_admin_delete_cq		= 0x04,
226 	nvme_admin_create_cq		= 0x05,
227 	nvme_admin_identify		= 0x06,
228 	nvme_admin_abort_cmd		= 0x08,
229 	nvme_admin_set_features		= 0x09,
230 	nvme_admin_get_features		= 0x0a,
231 	nvme_admin_async_event		= 0x0c,
232 	nvme_admin_activate_fw		= 0x10,
233 	nvme_admin_download_fw		= 0x11,
234 	nvme_admin_format_nvm		= 0x80,
235 	nvme_admin_security_send	= 0x81,
236 	nvme_admin_security_recv	= 0x82,
237 };
238 
239 enum {
240 	NVME_QUEUE_PHYS_CONTIG	= (1 << 0),
241 	NVME_CQ_IRQ_ENABLED	= (1 << 1),
242 	NVME_SQ_PRIO_URGENT	= (0 << 1),
243 	NVME_SQ_PRIO_HIGH	= (1 << 1),
244 	NVME_SQ_PRIO_MEDIUM	= (2 << 1),
245 	NVME_SQ_PRIO_LOW	= (3 << 1),
246 	NVME_FEAT_ARBITRATION	= 0x01,
247 	NVME_FEAT_POWER_MGMT	= 0x02,
248 	NVME_FEAT_LBA_RANGE	= 0x03,
249 	NVME_FEAT_TEMP_THRESH	= 0x04,
250 	NVME_FEAT_ERR_RECOVERY	= 0x05,
251 	NVME_FEAT_VOLATILE_WC	= 0x06,
252 	NVME_FEAT_NUM_QUEUES	= 0x07,
253 	NVME_FEAT_IRQ_COALESCE	= 0x08,
254 	NVME_FEAT_IRQ_CONFIG	= 0x09,
255 	NVME_FEAT_WRITE_ATOMIC	= 0x0a,
256 	NVME_FEAT_ASYNC_EVENT	= 0x0b,
257 	NVME_FEAT_SW_PROGRESS	= 0x0c,
258 };
259 
260 struct nvme_identify {
261 	__u8			opcode;
262 	__u8			flags;
263 	__u16			command_id;
264 	__le32			nsid;
265 	__u64			rsvd2[2];
266 	__le64			prp1;
267 	__le64			prp2;
268 	__le32			cns;
269 	__u32			rsvd11[5];
270 };
271 
272 struct nvme_features {
273 	__u8			opcode;
274 	__u8			flags;
275 	__u16			command_id;
276 	__le32			nsid;
277 	__u64			rsvd2[2];
278 	__le64			prp1;
279 	__le64			prp2;
280 	__le32			fid;
281 	__le32			dword11;
282 	__u32			rsvd12[4];
283 };
284 
285 struct nvme_create_cq {
286 	__u8			opcode;
287 	__u8			flags;
288 	__u16			command_id;
289 	__u32			rsvd1[5];
290 	__le64			prp1;
291 	__u64			rsvd8;
292 	__le16			cqid;
293 	__le16			qsize;
294 	__le16			cq_flags;
295 	__le16			irq_vector;
296 	__u32			rsvd12[4];
297 };
298 
299 struct nvme_create_sq {
300 	__u8			opcode;
301 	__u8			flags;
302 	__u16			command_id;
303 	__u32			rsvd1[5];
304 	__le64			prp1;
305 	__u64			rsvd8;
306 	__le16			sqid;
307 	__le16			qsize;
308 	__le16			sq_flags;
309 	__le16			cqid;
310 	__u32			rsvd12[4];
311 };
312 
313 struct nvme_delete_queue {
314 	__u8			opcode;
315 	__u8			flags;
316 	__u16			command_id;
317 	__u32			rsvd1[9];
318 	__le16			qid;
319 	__u16			rsvd10;
320 	__u32			rsvd11[5];
321 };
322 
323 struct nvme_download_firmware {
324 	__u8			opcode;
325 	__u8			flags;
326 	__u16			command_id;
327 	__u32			rsvd1[5];
328 	__le64			prp1;
329 	__le64			prp2;
330 	__le32			numd;
331 	__le32			offset;
332 	__u32			rsvd12[4];
333 };
334 
335 struct nvme_command {
336 	union {
337 		struct nvme_common_command common;
338 		struct nvme_rw_command rw;
339 		struct nvme_identify identify;
340 		struct nvme_features features;
341 		struct nvme_create_cq create_cq;
342 		struct nvme_create_sq create_sq;
343 		struct nvme_delete_queue delete_queue;
344 		struct nvme_download_firmware dlfw;
345 	};
346 };
347 
348 enum {
349 	NVME_SC_SUCCESS			= 0x0,
350 	NVME_SC_INVALID_OPCODE		= 0x1,
351 	NVME_SC_INVALID_FIELD		= 0x2,
352 	NVME_SC_CMDID_CONFLICT		= 0x3,
353 	NVME_SC_DATA_XFER_ERROR		= 0x4,
354 	NVME_SC_POWER_LOSS		= 0x5,
355 	NVME_SC_INTERNAL		= 0x6,
356 	NVME_SC_ABORT_REQ		= 0x7,
357 	NVME_SC_ABORT_QUEUE		= 0x8,
358 	NVME_SC_FUSED_FAIL		= 0x9,
359 	NVME_SC_FUSED_MISSING		= 0xa,
360 	NVME_SC_INVALID_NS		= 0xb,
361 	NVME_SC_LBA_RANGE		= 0x80,
362 	NVME_SC_CAP_EXCEEDED		= 0x81,
363 	NVME_SC_NS_NOT_READY		= 0x82,
364 	NVME_SC_CQ_INVALID		= 0x100,
365 	NVME_SC_QID_INVALID		= 0x101,
366 	NVME_SC_QUEUE_SIZE		= 0x102,
367 	NVME_SC_ABORT_LIMIT		= 0x103,
368 	NVME_SC_ABORT_MISSING		= 0x104,
369 	NVME_SC_ASYNC_LIMIT		= 0x105,
370 	NVME_SC_FIRMWARE_SLOT		= 0x106,
371 	NVME_SC_FIRMWARE_IMAGE		= 0x107,
372 	NVME_SC_INVALID_VECTOR		= 0x108,
373 	NVME_SC_INVALID_LOG_PAGE	= 0x109,
374 	NVME_SC_INVALID_FORMAT		= 0x10a,
375 	NVME_SC_BAD_ATTRIBUTES		= 0x180,
376 	NVME_SC_WRITE_FAULT		= 0x280,
377 	NVME_SC_READ_ERROR		= 0x281,
378 	NVME_SC_GUARD_CHECK		= 0x282,
379 	NVME_SC_APPTAG_CHECK		= 0x283,
380 	NVME_SC_REFTAG_CHECK		= 0x284,
381 	NVME_SC_COMPARE_FAILED		= 0x285,
382 	NVME_SC_ACCESS_DENIED		= 0x286,
383 };
384 
385 struct nvme_completion {
386 	__le32	result;		/* Used by admin commands to return data */
387 	__u32	rsvd;
388 	__le16	sq_head;	/* how much of this queue may be reclaimed */
389 	__le16	sq_id;		/* submission queue that generated this entry */
390 	__u16	command_id;	/* of the command which completed */
391 	__le16	status;		/* did the command fail, and if so, why? */
392 };
393 
394 struct nvme_user_io {
395 	__u8	opcode;
396 	__u8	flags;
397 	__u16	control;
398 	__u16	nblocks;
399 	__u16	rsvd;
400 	__u64	metadata;
401 	__u64	addr;
402 	__u64	slba;
403 	__u32	dsmgmt;
404 	__u32	reftag;
405 	__u16	apptag;
406 	__u16	appmask;
407 };
408 
409 struct nvme_admin_cmd {
410 	__u8	opcode;
411 	__u8	flags;
412 	__u16	rsvd1;
413 	__u32	nsid;
414 	__u32	cdw2;
415 	__u32	cdw3;
416 	__u64	metadata;
417 	__u64	addr;
418 	__u32	metadata_len;
419 	__u32	data_len;
420 	__u32	cdw10;
421 	__u32	cdw11;
422 	__u32	cdw12;
423 	__u32	cdw13;
424 	__u32	cdw14;
425 	__u32	cdw15;
426 	__u32	timeout_ms;
427 	__u32	result;
428 };
429 
430 #define NVME_IOCTL_ID		_IO('N', 0x40)
431 #define NVME_IOCTL_ADMIN_CMD	_IOWR('N', 0x41, struct nvme_admin_cmd)
432 #define NVME_IOCTL_SUBMIT_IO	_IOW('N', 0x42, struct nvme_user_io)
433 
434 #endif /* _LINUX_NVME_H */
435