sys/cam/nvme/nvme_da.c

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