1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2015 Netflix, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer,
11 * without modification, immediately at the beginning of the file.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * Derived from ata_da.c:
28 * Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
29 */
30
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33
34 #ifdef _KERNEL
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/bio.h>
38 #include <sys/sysctl.h>
39 #include <sys/taskqueue.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/conf.h>
43 #include <sys/devicestat.h>
44 #include <sys/eventhandler.h>
45 #include <sys/malloc.h>
46 #include <sys/cons.h>
47 #include <sys/proc.h>
48 #include <sys/reboot.h>
49 #include <sys/sbuf.h>
50 #include <geom/geom.h>
51 #include <geom/geom_disk.h>
52 #endif /* _KERNEL */
53
54 #ifndef _KERNEL
55 #include <stdio.h>
56 #include <string.h>
57 #endif /* _KERNEL */
58
59 #include <cam/cam.h>
60 #include <cam/cam_ccb.h>
61 #include <cam/cam_periph.h>
62 #include <cam/cam_xpt_periph.h>
63 #include <cam/cam_sim.h>
64 #include <cam/cam_iosched.h>
65
66 #include <cam/nvme/nvme_all.h>
67
68 typedef enum {
69 NDA_STATE_NORMAL
70 } nda_state;
71
72 typedef enum {
73 NDA_FLAG_OPEN = 0x0001,
74 NDA_FLAG_DIRTY = 0x0002,
75 NDA_FLAG_SCTX_INIT = 0x0004,
76 } nda_flags;
77 #define NDA_FLAG_STRING \
78 "\020" \
79 "\001OPEN" \
80 "\002DIRTY" \
81 "\003SCTX_INIT"
82
83 typedef enum {
84 NDA_Q_4K = 0x01,
85 NDA_Q_NONE = 0x00,
86 } nda_quirks;
87
88 #define NDA_Q_BIT_STRING \
89 "\020" \
90 "\001Bit 0"
91
92 typedef enum {
93 NDA_CCB_BUFFER_IO = 0x01,
94 NDA_CCB_DUMP = 0x02,
95 NDA_CCB_TRIM = 0x03,
96 NDA_CCB_PASS = 0x04,
97 NDA_CCB_TYPE_MASK = 0x0F,
98 } nda_ccb_state;
99
100 /* Offsets into our private area for storing information */
101 #define ccb_state ccb_h.ppriv_field0
102 #define ccb_bp ccb_h.ppriv_ptr1 /* For NDA_CCB_BUFFER_IO */
103 #define ccb_trim ccb_h.ppriv_ptr1 /* For NDA_CCB_TRIM */
104
105 struct nda_softc {
106 struct cam_iosched_softc *cam_iosched;
107 int outstanding_cmds; /* Number of active commands */
108 int refcount; /* Active xpt_action() calls */
109 nda_state state;
110 nda_flags flags;
111 nda_quirks quirks;
112 int unmappedio;
113 quad_t deletes;
114 uint32_t nsid; /* Namespace ID for this nda device */
115 struct disk *disk;
116 struct task sysctl_task;
117 struct sysctl_ctx_list sysctl_ctx;
118 struct sysctl_oid *sysctl_tree;
119 uint64_t trim_count;
120 uint64_t trim_ranges;
121 uint64_t trim_lbas;
122 #ifdef CAM_TEST_FAILURE
123 int force_read_error;
124 int force_write_error;
125 int periodic_read_error;
126 int periodic_read_count;
127 #endif
128 #ifdef CAM_IO_STATS
129 struct sysctl_ctx_list sysctl_stats_ctx;
130 struct sysctl_oid *sysctl_stats_tree;
131 u_int timeouts;
132 u_int errors;
133 u_int invalidations;
134 #endif
135 };
136
137 struct nda_trim_request {
138 struct nvme_dsm_range dsm[NVME_MAX_DSM_TRIM / sizeof(struct nvme_dsm_range)];
139 TAILQ_HEAD(, bio) bps;
140 };
141 _Static_assert(NVME_MAX_DSM_TRIM % sizeof(struct nvme_dsm_range) == 0,
142 "NVME_MAX_DSM_TRIM must be an integral number of ranges");
143
144 /* Need quirk table */
145
146 static disk_ioctl_t ndaioctl;
147 static disk_strategy_t ndastrategy;
148 static dumper_t ndadump;
149 static periph_init_t ndainit;
150 static void ndaasync(void *callback_arg, u_int32_t code,
151 struct cam_path *path, void *arg);
152 static void ndasysctlinit(void *context, int pending);
153 static int ndaflagssysctl(SYSCTL_HANDLER_ARGS);
154 static periph_ctor_t ndaregister;
155 static periph_dtor_t ndacleanup;
156 static periph_start_t ndastart;
157 static periph_oninv_t ndaoninvalidate;
158 static void ndadone(struct cam_periph *periph,
159 union ccb *done_ccb);
160 static int ndaerror(union ccb *ccb, u_int32_t cam_flags,
161 u_int32_t sense_flags);
162 static void ndashutdown(void *arg, int howto);
163 static void ndasuspend(void *arg);
164
165 #ifndef NDA_DEFAULT_SEND_ORDERED
166 #define NDA_DEFAULT_SEND_ORDERED 1
167 #endif
168 #ifndef NDA_DEFAULT_TIMEOUT
169 #define NDA_DEFAULT_TIMEOUT 30 /* Timeout in seconds */
170 #endif
171 #ifndef NDA_DEFAULT_RETRY
172 #define NDA_DEFAULT_RETRY 4
173 #endif
174 #ifndef NDA_MAX_TRIM_ENTRIES
175 #define NDA_MAX_TRIM_ENTRIES (NVME_MAX_DSM_TRIM / sizeof(struct nvme_dsm_range))/* Number of DSM trims to use, max 256 */
176 #endif
177
178 static SYSCTL_NODE(_kern_cam, OID_AUTO, nda, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
179 "CAM Direct Access Disk driver");
180
181 //static int nda_retry_count = NDA_DEFAULT_RETRY;
182 static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED;
183 static int nda_default_timeout = NDA_DEFAULT_TIMEOUT;
184 static int nda_max_trim_entries = NDA_MAX_TRIM_ENTRIES;
185 static int nda_enable_biospeedup = 1;
186 static int nda_nvd_compat = 1;
187 SYSCTL_INT(_kern_cam_nda, OID_AUTO, max_trim, CTLFLAG_RDTUN,
188 &nda_max_trim_entries, NDA_MAX_TRIM_ENTRIES,
189 "Maximum number of BIO_DELETE to send down as a DSM TRIM.");
190 SYSCTL_INT(_kern_cam_nda, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN,
191 &nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing.");
192 SYSCTL_INT(_kern_cam_nda, OID_AUTO, nvd_compat, CTLFLAG_RDTUN,
193 &nda_nvd_compat, 1, "Enable creation of nvd aliases.");
194
195 /*
196 * All NVMe media is non-rotational, so all nvme device instances
197 * share this to implement the sysctl.
198 */
199 static int nda_rotating_media = 0;
200
201 static struct periph_driver ndadriver =
202 {
203 ndainit, "nda",
204 TAILQ_HEAD_INITIALIZER(ndadriver.units), /* generation */ 0
205 };
206
207 PERIPHDRIVER_DECLARE(nda, ndadriver);
208
209 static MALLOC_DEFINE(M_NVMEDA, "nvme_da", "nvme_da buffers");
210
211 /*
212 * nice wrappers. Maybe these belong in nvme_all.c instead of
213 * here, but this is the only place that uses these. Should
214 * we ever grow another NVME periph, we should move them
215 * all there wholesale.
216 */
217
218 static void
nda_nvme_flush(struct nda_softc * softc,struct ccb_nvmeio * nvmeio)219 nda_nvme_flush(struct nda_softc *softc, struct ccb_nvmeio *nvmeio)
220 {
221 cam_fill_nvmeio(nvmeio,
222 0, /* retries */
223 ndadone, /* cbfcnp */
224 CAM_DIR_NONE, /* flags */
225 NULL, /* data_ptr */
226 0, /* dxfer_len */
227 nda_default_timeout * 1000); /* timeout 30s */
228 nvme_ns_flush_cmd(&nvmeio->cmd, softc->nsid);
229 }
230
231 static void
nda_nvme_trim(struct nda_softc * softc,struct ccb_nvmeio * nvmeio,void * payload,uint32_t num_ranges)232 nda_nvme_trim(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
233 void *payload, uint32_t num_ranges)
234 {
235 cam_fill_nvmeio(nvmeio,
236 0, /* retries */
237 ndadone, /* cbfcnp */
238 CAM_DIR_OUT, /* flags */
239 payload, /* data_ptr */
240 num_ranges * sizeof(struct nvme_dsm_range), /* dxfer_len */
241 nda_default_timeout * 1000); /* timeout 30s */
242 nvme_ns_trim_cmd(&nvmeio->cmd, softc->nsid, num_ranges);
243 }
244
245 static void
nda_nvme_write(struct nda_softc * softc,struct ccb_nvmeio * nvmeio,void * payload,uint64_t lba,uint32_t len,uint32_t count)246 nda_nvme_write(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
247 void *payload, uint64_t lba, uint32_t len, uint32_t count)
248 {
249 cam_fill_nvmeio(nvmeio,
250 0, /* retries */
251 ndadone, /* cbfcnp */
252 CAM_DIR_OUT, /* flags */
253 payload, /* data_ptr */
254 len, /* dxfer_len */
255 nda_default_timeout * 1000); /* timeout 30s */
256 nvme_ns_write_cmd(&nvmeio->cmd, softc->nsid, lba, count);
257 }
258
259 static void
nda_nvme_rw_bio(struct nda_softc * softc,struct ccb_nvmeio * nvmeio,struct bio * bp,uint32_t rwcmd)260 nda_nvme_rw_bio(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
261 struct bio *bp, uint32_t rwcmd)
262 {
263 int flags = rwcmd == NVME_OPC_READ ? CAM_DIR_IN : CAM_DIR_OUT;
264 void *payload;
265 uint64_t lba;
266 uint32_t count;
267
268 if (bp->bio_flags & BIO_UNMAPPED) {
269 flags |= CAM_DATA_BIO;
270 payload = bp;
271 } else {
272 payload = bp->bio_data;
273 }
274
275 lba = bp->bio_pblkno;
276 count = bp->bio_bcount / softc->disk->d_sectorsize;
277
278 cam_fill_nvmeio(nvmeio,
279 0, /* retries */
280 ndadone, /* cbfcnp */
281 flags, /* flags */
282 payload, /* data_ptr */
283 bp->bio_bcount, /* dxfer_len */
284 nda_default_timeout * 1000); /* timeout 30s */
285 nvme_ns_rw_cmd(&nvmeio->cmd, rwcmd, softc->nsid, lba, count);
286 }
287
288 static int
ndaopen(struct disk * dp)289 ndaopen(struct disk *dp)
290 {
291 struct cam_periph *periph;
292 struct nda_softc *softc;
293 int error;
294
295 periph = (struct cam_periph *)dp->d_drv1;
296 if (cam_periph_acquire(periph) != 0) {
297 return(ENXIO);
298 }
299
300 cam_periph_lock(periph);
301 if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
302 cam_periph_unlock(periph);
303 cam_periph_release(periph);
304 return (error);
305 }
306
307 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH,
308 ("ndaopen\n"));
309
310 softc = (struct nda_softc *)periph->softc;
311 softc->flags |= NDA_FLAG_OPEN;
312
313 cam_periph_unhold(periph);
314 cam_periph_unlock(periph);
315 return (0);
316 }
317
318 static int
ndaclose(struct disk * dp)319 ndaclose(struct disk *dp)
320 {
321 struct cam_periph *periph;
322 struct nda_softc *softc;
323 union ccb *ccb;
324 int error;
325
326 periph = (struct cam_periph *)dp->d_drv1;
327 softc = (struct nda_softc *)periph->softc;
328 cam_periph_lock(periph);
329
330 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH,
331 ("ndaclose\n"));
332
333 if ((softc->flags & NDA_FLAG_DIRTY) != 0 &&
334 (periph->flags & CAM_PERIPH_INVALID) == 0 &&
335 cam_periph_hold(periph, PRIBIO) == 0) {
336 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
337 nda_nvme_flush(softc, &ccb->nvmeio);
338 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0,
339 /*sense_flags*/0, softc->disk->d_devstat);
340
341 if (error != 0)
342 xpt_print(periph->path, "Synchronize cache failed\n");
343 else
344 softc->flags &= ~NDA_FLAG_DIRTY;
345 xpt_release_ccb(ccb);
346 cam_periph_unhold(periph);
347 }
348
349 softc->flags &= ~NDA_FLAG_OPEN;
350
351 while (softc->refcount != 0)
352 cam_periph_sleep(periph, &softc->refcount, PRIBIO, "ndaclose", 1);
353 KASSERT(softc->outstanding_cmds == 0,
354 ("nda %d outstanding commands", softc->outstanding_cmds));
355 cam_periph_unlock(periph);
356 cam_periph_release(periph);
357 return (0);
358 }
359
360 static void
ndaschedule(struct cam_periph * periph)361 ndaschedule(struct cam_periph *periph)
362 {
363 struct nda_softc *softc = (struct nda_softc *)periph->softc;
364
365 if (softc->state != NDA_STATE_NORMAL)
366 return;
367
368 cam_iosched_schedule(softc->cam_iosched, periph);
369 }
370
371 static int
ndaioctl(struct disk * dp,u_long cmd,void * data,int fflag,struct thread * td)372 ndaioctl(struct disk *dp, u_long cmd, void *data, int fflag,
373 struct thread *td)
374 {
375 struct cam_periph *periph;
376
377 periph = (struct cam_periph *)dp->d_drv1;
378
379 switch (cmd) {
380 case NVME_IO_TEST:
381 case NVME_BIO_TEST:
382 /*
383 * These don't map well to the underlying CCBs, so
384 * they are usupported via CAM.
385 */
386 return (ENOTTY);
387 case NVME_GET_NSID:
388 {
389 struct nvme_get_nsid *gnsid = (struct nvme_get_nsid *)data;
390 struct ccb_pathinq cpi;
391
392 xpt_path_inq(&cpi, periph->path);
393 strncpy(gnsid->cdev, cpi.xport_specific.nvme.dev_name,
394 sizeof(gnsid->cdev));
395 gnsid->nsid = cpi.xport_specific.nvme.nsid;
396 return (0);
397 }
398 case NVME_PASSTHROUGH_CMD:
399 {
400 struct nvme_pt_command *pt;
401 union ccb *ccb;
402 struct cam_periph_map_info mapinfo;
403 u_int maxmap = dp->d_maxsize;
404 int error;
405
406 /*
407 * Create a NVME_IO CCB to do the passthrough command.
408 */
409 pt = (struct nvme_pt_command *)data;
410 ccb = xpt_alloc_ccb();
411 xpt_setup_ccb(&ccb->ccb_h, periph->path, CAM_PRIORITY_NORMAL);
412 ccb->ccb_state = NDA_CCB_PASS;
413 cam_fill_nvmeio(&ccb->nvmeio,
414 0, /* Retries */
415 ndadone,
416 (pt->is_read ? CAM_DIR_IN : CAM_DIR_OUT) | CAM_DATA_VADDR,
417 pt->buf,
418 pt->len,
419 nda_default_timeout * 1000);
420 memcpy(&ccb->nvmeio.cmd, &pt->cmd, sizeof(pt->cmd));
421
422 /*
423 * Wire the user memory in this request for the I/O
424 */
425 memset(&mapinfo, 0, sizeof(mapinfo));
426 error = cam_periph_mapmem(ccb, &mapinfo, maxmap);
427 if (error)
428 goto out;
429
430 /*
431 * Lock the periph and run the command.
432 */
433 cam_periph_lock(periph);
434 cam_periph_runccb(ccb, NULL, CAM_RETRY_SELTO,
435 SF_RETRY_UA | SF_NO_PRINT, NULL);
436
437 /*
438 * Tear down mapping and return status.
439 */
440 cam_periph_unlock(periph);
441 cam_periph_unmapmem(ccb, &mapinfo);
442 error = (ccb->ccb_h.status == CAM_REQ_CMP) ? 0 : EIO;
443 out:
444 cam_periph_lock(periph);
445 xpt_release_ccb(ccb);
446 cam_periph_unlock(periph);
447 return (error);
448 }
449 default:
450 break;
451 }
452 return (ENOTTY);
453 }
454
455 /*
456 * Actually translate the requested transfer into one the physical driver
457 * can understand. The transfer is described by a buf and will include
458 * only one physical transfer.
459 */
460 static void
ndastrategy(struct bio * bp)461 ndastrategy(struct bio *bp)
462 {
463 struct cam_periph *periph;
464 struct nda_softc *softc;
465
466 periph = (struct cam_periph *)bp->bio_disk->d_drv1;
467 softc = (struct nda_softc *)periph->softc;
468
469 cam_periph_lock(periph);
470
471 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastrategy(%p)\n", bp));
472
473 /*
474 * If the device has been made invalid, error out
475 */
476 if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
477 cam_periph_unlock(periph);
478 biofinish(bp, NULL, ENXIO);
479 return;
480 }
481
482 if (bp->bio_cmd == BIO_DELETE)
483 softc->deletes++;
484
485 /*
486 * Place it in the queue of disk activities for this disk
487 */
488 cam_iosched_queue_work(softc->cam_iosched, bp);
489
490 /*
491 * Schedule ourselves for performing the work.
492 */
493 ndaschedule(periph);
494 cam_periph_unlock(periph);
495
496 return;
497 }
498
499 static int
ndadump(void * arg,void * virtual,off_t offset,size_t length)500 ndadump(void *arg, void *virtual, off_t offset, size_t length)
501 {
502 struct cam_periph *periph;
503 struct nda_softc *softc;
504 u_int secsize;
505 struct ccb_nvmeio nvmeio;
506 struct disk *dp;
507 uint64_t lba;
508 uint32_t count;
509 int error = 0;
510
511 dp = arg;
512 periph = dp->d_drv1;
513 softc = (struct nda_softc *)periph->softc;
514 secsize = softc->disk->d_sectorsize;
515 lba = offset / secsize;
516 count = length / secsize;
517
518 if ((periph->flags & CAM_PERIPH_INVALID) != 0)
519 return (ENXIO);
520
521 /* xpt_get_ccb returns a zero'd allocation for the ccb, mimic that here */
522 memset(&nvmeio, 0, sizeof(nvmeio));
523 if (length > 0) {
524 xpt_setup_ccb(&nvmeio.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
525 nvmeio.ccb_state = NDA_CCB_DUMP;
526 nda_nvme_write(softc, &nvmeio, virtual, lba, length, count);
527 error = cam_periph_runccb((union ccb *)&nvmeio, cam_periph_error,
528 0, SF_NO_RECOVERY | SF_NO_RETRY, NULL);
529 if (error != 0)
530 printf("Aborting dump due to I/O error %d.\n", error);
531
532 return (error);
533 }
534
535 /* Flush */
536 xpt_setup_ccb(&nvmeio.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
537
538 nvmeio.ccb_state = NDA_CCB_DUMP;
539 nda_nvme_flush(softc, &nvmeio);
540 error = cam_periph_runccb((union ccb *)&nvmeio, cam_periph_error,
541 0, SF_NO_RECOVERY | SF_NO_RETRY, NULL);
542 if (error != 0)
543 xpt_print(periph->path, "flush cmd failed\n");
544 return (error);
545 }
546
547 static void
ndainit(void)548 ndainit(void)
549 {
550 cam_status status;
551
552 /*
553 * Install a global async callback. This callback will
554 * receive async callbacks like "new device found".
555 */
556 status = xpt_register_async(AC_FOUND_DEVICE, ndaasync, NULL, NULL);
557
558 if (status != CAM_REQ_CMP) {
559 printf("nda: Failed to attach master async callback "
560 "due to status 0x%x!\n", status);
561 } else if (nda_send_ordered) {
562 /* Register our event handlers */
563 if ((EVENTHANDLER_REGISTER(power_suspend, ndasuspend,
564 NULL, EVENTHANDLER_PRI_LAST)) == NULL)
565 printf("ndainit: power event registration failed!\n");
566 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, ndashutdown,
567 NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
568 printf("ndainit: shutdown event registration failed!\n");
569 }
570 }
571
572 /*
573 * Callback from GEOM, called when it has finished cleaning up its
574 * resources.
575 */
576 static void
ndadiskgonecb(struct disk * dp)577 ndadiskgonecb(struct disk *dp)
578 {
579 struct cam_periph *periph;
580
581 periph = (struct cam_periph *)dp->d_drv1;
582
583 cam_periph_release(periph);
584 }
585
586 static void
ndaoninvalidate(struct cam_periph * periph)587 ndaoninvalidate(struct cam_periph *periph)
588 {
589 struct nda_softc *softc;
590
591 softc = (struct nda_softc *)periph->softc;
592
593 /*
594 * De-register any async callbacks.
595 */
596 xpt_register_async(0, ndaasync, periph, periph->path);
597 #ifdef CAM_IO_STATS
598 softc->invalidations++;
599 #endif
600
601 /*
602 * Return all queued I/O with ENXIO.
603 * XXX Handle any transactions queued to the card
604 * with XPT_ABORT_CCB.
605 */
606 cam_iosched_flush(softc->cam_iosched, NULL, ENXIO);
607
608 disk_gone(softc->disk);
609 }
610
611 static void
ndacleanup(struct cam_periph * periph)612 ndacleanup(struct cam_periph *periph)
613 {
614 struct nda_softc *softc;
615
616 softc = (struct nda_softc *)periph->softc;
617
618 cam_periph_unlock(periph);
619
620 cam_iosched_fini(softc->cam_iosched);
621
622 /*
623 * If we can't free the sysctl tree, oh well...
624 */
625 if ((softc->flags & NDA_FLAG_SCTX_INIT) != 0) {
626 #ifdef CAM_IO_STATS
627 if (sysctl_ctx_free(&softc->sysctl_stats_ctx) != 0)
628 xpt_print(periph->path,
629 "can't remove sysctl stats context\n");
630 #endif
631 if (sysctl_ctx_free(&softc->sysctl_ctx) != 0)
632 xpt_print(periph->path,
633 "can't remove sysctl context\n");
634 }
635
636 disk_destroy(softc->disk);
637 free(softc, M_DEVBUF);
638 cam_periph_lock(periph);
639 }
640
641 static void
ndaasync(void * callback_arg,u_int32_t code,struct cam_path * path,void * arg)642 ndaasync(void *callback_arg, u_int32_t code,
643 struct cam_path *path, void *arg)
644 {
645 struct cam_periph *periph;
646
647 periph = (struct cam_periph *)callback_arg;
648 switch (code) {
649 case AC_FOUND_DEVICE:
650 {
651 struct ccb_getdev *cgd;
652 cam_status status;
653
654 cgd = (struct ccb_getdev *)arg;
655 if (cgd == NULL)
656 break;
657
658 if (cgd->protocol != PROTO_NVME)
659 break;
660
661 /*
662 * Allocate a peripheral instance for
663 * this device and start the probe
664 * process.
665 */
666 status = cam_periph_alloc(ndaregister, ndaoninvalidate,
667 ndacleanup, ndastart,
668 "nda", CAM_PERIPH_BIO,
669 path, ndaasync,
670 AC_FOUND_DEVICE, cgd);
671
672 if (status != CAM_REQ_CMP
673 && status != CAM_REQ_INPROG)
674 printf("ndaasync: Unable to attach to new device "
675 "due to status 0x%x\n", status);
676 break;
677 }
678 case AC_ADVINFO_CHANGED:
679 {
680 uintptr_t buftype;
681
682 buftype = (uintptr_t)arg;
683 if (buftype == CDAI_TYPE_PHYS_PATH) {
684 struct nda_softc *softc;
685
686 softc = periph->softc;
687 disk_attr_changed(softc->disk, "GEOM::physpath",
688 M_NOWAIT);
689 }
690 break;
691 }
692 case AC_LOST_DEVICE:
693 default:
694 cam_periph_async(periph, code, path, arg);
695 break;
696 }
697 }
698
699 static void
ndasysctlinit(void * context,int pending)700 ndasysctlinit(void *context, int pending)
701 {
702 struct cam_periph *periph;
703 struct nda_softc *softc;
704 char tmpstr[32], tmpstr2[16];
705
706 periph = (struct cam_periph *)context;
707
708 /* periph was held for us when this task was enqueued */
709 if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
710 cam_periph_release(periph);
711 return;
712 }
713
714 softc = (struct nda_softc *)periph->softc;
715 snprintf(tmpstr, sizeof(tmpstr), "CAM NDA unit %d", periph->unit_number);
716 snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
717
718 sysctl_ctx_init(&softc->sysctl_ctx);
719 softc->flags |= NDA_FLAG_SCTX_INIT;
720 softc->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&softc->sysctl_ctx,
721 SYSCTL_STATIC_CHILDREN(_kern_cam_nda), OID_AUTO, tmpstr2,
722 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr, "device_index");
723 if (softc->sysctl_tree == NULL) {
724 printf("ndasysctlinit: unable to allocate sysctl tree\n");
725 cam_periph_release(periph);
726 return;
727 }
728
729 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
730 OID_AUTO, "unmapped_io", CTLFLAG_RD,
731 &softc->unmappedio, 0, "Unmapped I/O leaf");
732
733 SYSCTL_ADD_QUAD(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
734 OID_AUTO, "deletes", CTLFLAG_RD,
735 &softc->deletes, "Number of BIO_DELETE requests");
736
737 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx,
738 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
739 "trim_count", CTLFLAG_RD, &softc->trim_count,
740 "Total number of unmap/dsm commands sent");
741 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx,
742 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
743 "trim_ranges", CTLFLAG_RD, &softc->trim_ranges,
744 "Total number of ranges in unmap/dsm commands");
745 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx,
746 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
747 "trim_lbas", CTLFLAG_RD, &softc->trim_lbas,
748 "Total lbas in the unmap/dsm commands sent");
749
750 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
751 OID_AUTO, "rotating", CTLFLAG_RD, &nda_rotating_media, 1,
752 "Rotating media");
753
754 SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
755 OID_AUTO, "flags", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
756 softc, 0, ndaflagssysctl, "A",
757 "Flags for drive");
758
759 #ifdef CAM_IO_STATS
760 softc->sysctl_stats_tree = SYSCTL_ADD_NODE(&softc->sysctl_stats_ctx,
761 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, "stats",
762 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "Statistics");
763 if (softc->sysctl_stats_tree == NULL) {
764 printf("ndasysctlinit: unable to allocate sysctl tree for stats\n");
765 cam_periph_release(periph);
766 return;
767 }
768 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
769 SYSCTL_CHILDREN(softc->sysctl_stats_tree),
770 OID_AUTO, "timeouts", CTLFLAG_RD,
771 &softc->timeouts, 0,
772 "Device timeouts reported by the SIM");
773 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
774 SYSCTL_CHILDREN(softc->sysctl_stats_tree),
775 OID_AUTO, "errors", CTLFLAG_RD,
776 &softc->errors, 0,
777 "Transport errors reported by the SIM.");
778 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
779 SYSCTL_CHILDREN(softc->sysctl_stats_tree),
780 OID_AUTO, "pack_invalidations", CTLFLAG_RD,
781 &softc->invalidations, 0,
782 "Device pack invalidations.");
783 #endif
784
785 #ifdef CAM_TEST_FAILURE
786 SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
787 OID_AUTO, "invalidate", CTLTYPE_U64 | CTLFLAG_RW | CTLFLAG_MPSAFE,
788 periph, 0, cam_periph_invalidate_sysctl, "I",
789 "Write 1 to invalidate the drive immediately");
790 #endif
791
792 cam_iosched_sysctl_init(softc->cam_iosched, &softc->sysctl_ctx,
793 softc->sysctl_tree);
794
795 cam_periph_release(periph);
796 }
797
798 static int
ndaflagssysctl(SYSCTL_HANDLER_ARGS)799 ndaflagssysctl(SYSCTL_HANDLER_ARGS)
800 {
801 struct sbuf sbuf;
802 struct nda_softc *softc = arg1;
803 int error;
804
805 sbuf_new_for_sysctl(&sbuf, NULL, 0, req);
806 if (softc->flags != 0)
807 sbuf_printf(&sbuf, "0x%b", (unsigned)softc->flags, NDA_FLAG_STRING);
808 else
809 sbuf_printf(&sbuf, "0");
810 error = sbuf_finish(&sbuf);
811 sbuf_delete(&sbuf);
812
813 return (error);
814 }
815
816 static int
ndagetattr(struct bio * bp)817 ndagetattr(struct bio *bp)
818 {
819 int ret;
820 struct cam_periph *periph;
821
822 if (g_handleattr_int(bp, "GEOM::canspeedup", nda_enable_biospeedup))
823 return (EJUSTRETURN);
824
825 periph = (struct cam_periph *)bp->bio_disk->d_drv1;
826 cam_periph_lock(periph);
827 ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute,
828 periph->path);
829 cam_periph_unlock(periph);
830 if (ret == 0)
831 bp->bio_completed = bp->bio_length;
832 return ret;
833 }
834
835 static cam_status
ndaregister(struct cam_periph * periph,void * arg)836 ndaregister(struct cam_periph *periph, void *arg)
837 {
838 struct nda_softc *softc;
839 struct disk *disk;
840 struct ccb_pathinq cpi;
841 const struct nvme_namespace_data *nsd;
842 const struct nvme_controller_data *cd;
843 char announce_buf[80];
844 uint8_t flbas_fmt, lbads, vwc_present;
845 u_int maxio;
846 int quirks;
847
848 nsd = nvme_get_identify_ns(periph);
849 cd = nvme_get_identify_cntrl(periph);
850
851 softc = (struct nda_softc *)malloc(sizeof(*softc), M_DEVBUF,
852 M_NOWAIT | M_ZERO);
853
854 if (softc == NULL) {
855 printf("ndaregister: Unable to probe new device. "
856 "Unable to allocate softc\n");
857 return(CAM_REQ_CMP_ERR);
858 }
859
860 if (cam_iosched_init(&softc->cam_iosched, periph) != 0) {
861 printf("ndaregister: Unable to probe new device. "
862 "Unable to allocate iosched memory\n");
863 free(softc, M_DEVBUF);
864 return(CAM_REQ_CMP_ERR);
865 }
866
867 /* ident_data parsing */
868
869 periph->softc = softc;
870 softc->quirks = NDA_Q_NONE;
871 xpt_path_inq(&cpi, periph->path);
872 TASK_INIT(&softc->sysctl_task, 0, ndasysctlinit, periph);
873
874 /*
875 * The name space ID is the lun, save it for later I/O
876 */
877 softc->nsid = (uint32_t)xpt_path_lun_id(periph->path);
878
879 /*
880 * Register this media as a disk
881 */
882 (void)cam_periph_acquire(periph);
883 cam_periph_unlock(periph);
884 snprintf(announce_buf, sizeof(announce_buf),
885 "kern.cam.nda.%d.quirks", periph->unit_number);
886 quirks = softc->quirks;
887 TUNABLE_INT_FETCH(announce_buf, &quirks);
888 softc->quirks = quirks;
889 cam_iosched_set_sort_queue(softc->cam_iosched, 0);
890 softc->disk = disk = disk_alloc();
891 disk->d_rotation_rate = DISK_RR_NON_ROTATING;
892 disk->d_open = ndaopen;
893 disk->d_close = ndaclose;
894 disk->d_strategy = ndastrategy;
895 disk->d_ioctl = ndaioctl;
896 disk->d_getattr = ndagetattr;
897 if (cam_sim_pollable(periph->sim))
898 disk->d_dump = ndadump;
899 disk->d_gone = ndadiskgonecb;
900 disk->d_name = "nda";
901 disk->d_drv1 = periph;
902 disk->d_unit = periph->unit_number;
903 maxio = cpi.maxio; /* Honor max I/O size of SIM */
904 if (maxio == 0)
905 maxio = DFLTPHYS; /* traditional default */
906 else if (maxio > maxphys)
907 maxio = maxphys; /* for safety */
908 disk->d_maxsize = maxio;
909 flbas_fmt = (nsd->flbas >> NVME_NS_DATA_FLBAS_FORMAT_SHIFT) &
910 NVME_NS_DATA_FLBAS_FORMAT_MASK;
911 lbads = (nsd->lbaf[flbas_fmt] >> NVME_NS_DATA_LBAF_LBADS_SHIFT) &
912 NVME_NS_DATA_LBAF_LBADS_MASK;
913 disk->d_sectorsize = 1 << lbads;
914 disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze);
915 disk->d_delmaxsize = disk->d_mediasize;
916 disk->d_flags = DISKFLAG_DIRECT_COMPLETION;
917 if (nvme_ctrlr_has_dataset_mgmt(cd))
918 disk->d_flags |= DISKFLAG_CANDELETE;
919 vwc_present = (cd->vwc >> NVME_CTRLR_DATA_VWC_PRESENT_SHIFT) &
920 NVME_CTRLR_DATA_VWC_PRESENT_MASK;
921 if (vwc_present)
922 disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
923 if ((cpi.hba_misc & PIM_UNMAPPED) != 0) {
924 disk->d_flags |= DISKFLAG_UNMAPPED_BIO;
925 softc->unmappedio = 1;
926 }
927 /*
928 * d_ident and d_descr are both far bigger than the length of either
929 * the serial or model number strings.
930 */
931 cam_strvis_flag(disk->d_descr, cd->mn, NVME_MODEL_NUMBER_LENGTH,
932 sizeof(disk->d_descr), CAM_STRVIS_FLAG_NONASCII_SPC);
933
934 cam_strvis_flag(disk->d_ident, cd->sn, NVME_SERIAL_NUMBER_LENGTH,
935 sizeof(disk->d_ident), CAM_STRVIS_FLAG_NONASCII_SPC);
936
937 disk->d_hba_vendor = cpi.hba_vendor;
938 disk->d_hba_device = cpi.hba_device;
939 disk->d_hba_subvendor = cpi.hba_subvendor;
940 disk->d_hba_subdevice = cpi.hba_subdevice;
941 snprintf(disk->d_attachment, sizeof(disk->d_attachment),
942 "%s%d", cpi.dev_name, cpi.unit_number);
943 if (((nsd->nsfeat >> NVME_NS_DATA_NSFEAT_NPVALID_SHIFT) &
944 NVME_NS_DATA_NSFEAT_NPVALID_MASK) != 0 && nsd->npwg != 0)
945 disk->d_stripesize = ((nsd->npwg + 1) * disk->d_sectorsize);
946 else
947 disk->d_stripesize = nsd->noiob * disk->d_sectorsize;
948 disk->d_stripeoffset = 0;
949 disk->d_devstat = devstat_new_entry(periph->periph_name,
950 periph->unit_number, disk->d_sectorsize,
951 DEVSTAT_ALL_SUPPORTED,
952 DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport),
953 DEVSTAT_PRIORITY_DISK);
954 /*
955 * Add alias for older nvd drives to ease transition.
956 */
957 if (nda_nvd_compat)
958 disk_add_alias(disk, "nvd");
959
960 cam_periph_lock(periph);
961
962 snprintf(announce_buf, sizeof(announce_buf),
963 "%juMB (%ju %u byte sectors)",
964 (uintmax_t)((uintmax_t)disk->d_mediasize / (1024*1024)),
965 (uintmax_t)disk->d_mediasize / disk->d_sectorsize,
966 disk->d_sectorsize);
967 xpt_announce_periph(periph, announce_buf);
968 xpt_announce_quirks(periph, softc->quirks, NDA_Q_BIT_STRING);
969
970 /*
971 * Create our sysctl variables, now that we know
972 * we have successfully attached.
973 */
974 if (cam_periph_acquire(periph) == 0)
975 taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task);
976
977 /*
978 * Register for device going away and info about the drive
979 * changing (though with NVMe, it can't)
980 */
981 xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED,
982 ndaasync, periph, periph->path);
983
984 softc->state = NDA_STATE_NORMAL;
985
986 /*
987 * We'll release this reference once GEOM calls us back via
988 * ndadiskgonecb(), telling us that our provider has been freed.
989 */
990 if (cam_periph_acquire(periph) == 0)
991 disk_create(softc->disk, DISK_VERSION);
992
993 cam_periph_release_locked(periph);
994 return(CAM_REQ_CMP);
995 }
996
997 static void
ndastart(struct cam_periph * periph,union ccb * start_ccb)998 ndastart(struct cam_periph *periph, union ccb *start_ccb)
999 {
1000 struct nda_softc *softc = (struct nda_softc *)periph->softc;
1001 struct ccb_nvmeio *nvmeio = &start_ccb->nvmeio;
1002
1003 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart\n"));
1004
1005 switch (softc->state) {
1006 case NDA_STATE_NORMAL:
1007 {
1008 struct bio *bp;
1009
1010 bp = cam_iosched_next_bio(softc->cam_iosched);
1011 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart: bio %p\n", bp));
1012 if (bp == NULL) {
1013 xpt_release_ccb(start_ccb);
1014 break;
1015 }
1016
1017 switch (bp->bio_cmd) {
1018 case BIO_WRITE:
1019 softc->flags |= NDA_FLAG_DIRTY;
1020 /* FALLTHROUGH */
1021 case BIO_READ:
1022 {
1023 #ifdef CAM_TEST_FAILURE
1024 int fail = 0;
1025
1026 /*
1027 * Support the failure ioctls. If the command is a
1028 * read, and there are pending forced read errors, or
1029 * if a write and pending write errors, then fail this
1030 * operation with EIO. This is useful for testing
1031 * purposes. Also, support having every Nth read fail.
1032 *
1033 * This is a rather blunt tool.
1034 */
1035 if (bp->bio_cmd == BIO_READ) {
1036 if (softc->force_read_error) {
1037 softc->force_read_error--;
1038 fail = 1;
1039 }
1040 if (softc->periodic_read_error > 0) {
1041 if (++softc->periodic_read_count >=
1042 softc->periodic_read_error) {
1043 softc->periodic_read_count = 0;
1044 fail = 1;
1045 }
1046 }
1047 } else {
1048 if (softc->force_write_error) {
1049 softc->force_write_error--;
1050 fail = 1;
1051 }
1052 }
1053 if (fail) {
1054 biofinish(bp, NULL, EIO);
1055 xpt_release_ccb(start_ccb);
1056 ndaschedule(periph);
1057 return;
1058 }
1059 #endif
1060 KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 ||
1061 round_page(bp->bio_bcount + bp->bio_ma_offset) /
1062 PAGE_SIZE == bp->bio_ma_n,
1063 ("Short bio %p", bp));
1064 nda_nvme_rw_bio(softc, &start_ccb->nvmeio, bp, bp->bio_cmd == BIO_READ ?
1065 NVME_OPC_READ : NVME_OPC_WRITE);
1066 break;
1067 }
1068 case BIO_DELETE:
1069 {
1070 struct nvme_dsm_range *dsm_range, *dsm_end;
1071 struct nda_trim_request *trim;
1072 struct bio *bp1;
1073 int ents;
1074 uint32_t totalcount = 0, ranges = 0;
1075
1076 trim = malloc(sizeof(*trim), M_NVMEDA, M_ZERO | M_NOWAIT);
1077 if (trim == NULL) {
1078 biofinish(bp, NULL, ENOMEM);
1079 xpt_release_ccb(start_ccb);
1080 ndaschedule(periph);
1081 return;
1082 }
1083 TAILQ_INIT(&trim->bps);
1084 bp1 = bp;
1085 ents = min(nitems(trim->dsm), nda_max_trim_entries);
1086 ents = max(ents, 1);
1087 dsm_range = trim->dsm;
1088 dsm_end = dsm_range + ents;
1089 do {
1090 TAILQ_INSERT_TAIL(&trim->bps, bp1, bio_queue);
1091 dsm_range->length =
1092 htole32(bp1->bio_bcount / softc->disk->d_sectorsize);
1093 dsm_range->starting_lba =
1094 htole64(bp1->bio_offset / softc->disk->d_sectorsize);
1095 ranges++;
1096 totalcount += dsm_range->length;
1097 dsm_range++;
1098 if (dsm_range >= dsm_end)
1099 break;
1100 bp1 = cam_iosched_next_trim(softc->cam_iosched);
1101 /* XXX -- Could collapse adjacent ranges, but we don't for now */
1102 /* XXX -- Could limit based on total payload size */
1103 } while (bp1 != NULL);
1104 start_ccb->ccb_trim = trim;
1105 nda_nvme_trim(softc, &start_ccb->nvmeio, trim->dsm,
1106 dsm_range - trim->dsm);
1107 start_ccb->ccb_state = NDA_CCB_TRIM;
1108 softc->trim_count++;
1109 softc->trim_ranges += ranges;
1110 softc->trim_lbas += totalcount;
1111 /*
1112 * Note: We can have multiple TRIMs in flight, so we don't call
1113 * cam_iosched_submit_trim(softc->cam_iosched);
1114 * since that forces the I/O scheduler to only schedule one at a time.
1115 * On NVMe drives, this is a performance disaster.
1116 */
1117 goto out;
1118 }
1119 case BIO_FLUSH:
1120 nda_nvme_flush(softc, nvmeio);
1121 break;
1122 default:
1123 biofinish(bp, NULL, EOPNOTSUPP);
1124 xpt_release_ccb(start_ccb);
1125 ndaschedule(periph);
1126 return;
1127 }
1128 start_ccb->ccb_state = NDA_CCB_BUFFER_IO;
1129 start_ccb->ccb_bp = bp;
1130 out:
1131 start_ccb->ccb_h.flags |= CAM_UNLOCKED;
1132 softc->outstanding_cmds++;
1133 softc->refcount++; /* For submission only */
1134 cam_periph_unlock(periph);
1135 xpt_action(start_ccb);
1136 cam_periph_lock(periph);
1137 softc->refcount--; /* Submission done */
1138
1139 /* May have more work to do, so ensure we stay scheduled */
1140 ndaschedule(periph);
1141 break;
1142 }
1143 }
1144 }
1145
1146 static void
ndadone(struct cam_periph * periph,union ccb * done_ccb)1147 ndadone(struct cam_periph *periph, union ccb *done_ccb)
1148 {
1149 struct nda_softc *softc;
1150 struct ccb_nvmeio *nvmeio = &done_ccb->nvmeio;
1151 struct cam_path *path;
1152 int state;
1153
1154 softc = (struct nda_softc *)periph->softc;
1155 path = done_ccb->ccb_h.path;
1156
1157 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("ndadone\n"));
1158
1159 state = nvmeio->ccb_state & NDA_CCB_TYPE_MASK;
1160 switch (state) {
1161 case NDA_CCB_BUFFER_IO:
1162 case NDA_CCB_TRIM:
1163 {
1164 int error;
1165
1166 cam_periph_lock(periph);
1167 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1168 error = ndaerror(done_ccb, 0, 0);
1169 if (error == ERESTART) {
1170 /* A retry was scheduled, so just return. */
1171 cam_periph_unlock(periph);
1172 return;
1173 }
1174 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1175 cam_release_devq(path,
1176 /*relsim_flags*/0,
1177 /*reduction*/0,
1178 /*timeout*/0,
1179 /*getcount_only*/0);
1180 } else {
1181 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1182 panic("REQ_CMP with QFRZN");
1183 error = 0;
1184 }
1185 if (state == NDA_CCB_BUFFER_IO) {
1186 struct bio *bp;
1187
1188 bp = (struct bio *)done_ccb->ccb_bp;
1189 bp->bio_error = error;
1190 if (error != 0) {
1191 bp->bio_resid = bp->bio_bcount;
1192 bp->bio_flags |= BIO_ERROR;
1193 } else {
1194 bp->bio_resid = 0;
1195 }
1196 softc->outstanding_cmds--;
1197
1198 /*
1199 * We need to call cam_iosched before we call biodone so that we
1200 * don't measure any activity that happens in the completion
1201 * routine, which in the case of sendfile can be quite
1202 * extensive.
1203 */
1204 cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb);
1205 xpt_release_ccb(done_ccb);
1206 ndaschedule(periph);
1207 cam_periph_unlock(periph);
1208 biodone(bp);
1209 } else { /* state == NDA_CCB_TRIM */
1210 struct nda_trim_request *trim;
1211 struct bio *bp1, *bp2;
1212 TAILQ_HEAD(, bio) queue;
1213
1214 trim = nvmeio->ccb_trim;
1215 TAILQ_INIT(&queue);
1216 TAILQ_CONCAT(&queue, &trim->bps, bio_queue);
1217 free(trim, M_NVMEDA);
1218
1219 /*
1220 * Since we can have multiple trims in flight, we don't
1221 * need to call this here.
1222 * cam_iosched_trim_done(softc->cam_iosched);
1223 */
1224 /*
1225 * The the I/O scheduler that we're finishing the I/O
1226 * so we can keep book. The first one we pass in the CCB
1227 * which has the timing information. The rest we pass in NULL
1228 * so we can keep proper counts.
1229 */
1230 bp1 = TAILQ_FIRST(&queue);
1231 cam_iosched_bio_complete(softc->cam_iosched, bp1, done_ccb);
1232 xpt_release_ccb(done_ccb);
1233 softc->outstanding_cmds--;
1234 ndaschedule(periph);
1235 cam_periph_unlock(periph);
1236 while ((bp2 = TAILQ_FIRST(&queue)) != NULL) {
1237 TAILQ_REMOVE(&queue, bp2, bio_queue);
1238 bp2->bio_error = error;
1239 if (error != 0) {
1240 bp2->bio_flags |= BIO_ERROR;
1241 bp2->bio_resid = bp1->bio_bcount;
1242 } else
1243 bp2->bio_resid = 0;
1244 if (bp1 != bp2)
1245 cam_iosched_bio_complete(softc->cam_iosched, bp2, NULL);
1246 biodone(bp2);
1247 }
1248 }
1249 return;
1250 }
1251 case NDA_CCB_DUMP:
1252 /* No-op. We're polling */
1253 return;
1254 case NDA_CCB_PASS:
1255 /* NVME_PASSTHROUGH_CMD runs this CCB and releases it */
1256 return;
1257 default:
1258 break;
1259 }
1260 xpt_release_ccb(done_ccb);
1261 }
1262
1263 static int
ndaerror(union ccb * ccb,u_int32_t cam_flags,u_int32_t sense_flags)1264 ndaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1265 {
1266 #ifdef CAM_IO_STATS
1267 struct nda_softc *softc;
1268 struct cam_periph *periph;
1269
1270 periph = xpt_path_periph(ccb->ccb_h.path);
1271 softc = (struct nda_softc *)periph->softc;
1272 #endif
1273
1274 switch (ccb->ccb_h.status & CAM_STATUS_MASK) {
1275 case CAM_CMD_TIMEOUT:
1276 #ifdef CAM_IO_STATS
1277 softc->timeouts++;
1278 #endif
1279 break;
1280 case CAM_REQ_ABORTED:
1281 case CAM_REQ_CMP_ERR:
1282 case CAM_REQ_TERMIO:
1283 case CAM_UNREC_HBA_ERROR:
1284 case CAM_DATA_RUN_ERR:
1285 case CAM_ATA_STATUS_ERROR:
1286 #ifdef CAM_IO_STATS
1287 softc->errors++;
1288 #endif
1289 break;
1290 default:
1291 break;
1292 }
1293
1294 return(cam_periph_error(ccb, cam_flags, sense_flags));
1295 }
1296
1297 /*
1298 * Step through all NDA peripheral drivers, and if the device is still open,
1299 * sync the disk cache to physical media.
1300 */
1301 static void
ndaflush(void)1302 ndaflush(void)
1303 {
1304 struct cam_periph *periph;
1305 struct nda_softc *softc;
1306 union ccb *ccb;
1307 int error;
1308
1309 CAM_PERIPH_FOREACH(periph, &ndadriver) {
1310 softc = (struct nda_softc *)periph->softc;
1311
1312 if (SCHEDULER_STOPPED()) {
1313 /*
1314 * If we panicked with the lock held or the periph is not
1315 * open, do not recurse. Otherwise, call ndadump since
1316 * that avoids the sleeping cam_periph_getccb does if no
1317 * CCBs are available.
1318 */
1319 if (!cam_periph_owned(periph) &&
1320 (softc->flags & NDA_FLAG_OPEN)) {
1321 ndadump(softc->disk, NULL, 0, 0);
1322 }
1323 continue;
1324 }
1325
1326 /*
1327 * We only sync the cache if the drive is still open
1328 */
1329 cam_periph_lock(periph);
1330 if ((softc->flags & NDA_FLAG_OPEN) == 0) {
1331 cam_periph_unlock(periph);
1332 continue;
1333 }
1334
1335 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1336 nda_nvme_flush(softc, &ccb->nvmeio);
1337 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0,
1338 /*sense_flags*/ SF_NO_RECOVERY | SF_NO_RETRY,
1339 softc->disk->d_devstat);
1340 if (error != 0)
1341 xpt_print(periph->path, "Synchronize cache failed\n");
1342 xpt_release_ccb(ccb);
1343 cam_periph_unlock(periph);
1344 }
1345 }
1346
1347 static void
ndashutdown(void * arg,int howto)1348 ndashutdown(void *arg, int howto)
1349 {
1350
1351 if ((howto & RB_NOSYNC) != 0)
1352 return;
1353
1354 ndaflush();
1355 }
1356
1357 static void
ndasuspend(void * arg)1358 ndasuspend(void *arg)
1359 {
1360
1361 ndaflush();
1362 }
1363