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         uint32_t                nsid;                   /* Namespace ID for this nda device */
 109         struct disk             *disk;
 110         struct task             sysctl_task;
 111         struct sysctl_ctx_list  sysctl_ctx;
 112         struct sysctl_oid       *sysctl_tree;
 113         uint64_t                trim_count;
 114         uint64_t                trim_ranges;
 115         uint64_t                trim_lbas;
 116 #ifdef CAM_TEST_FAILURE
 117         int                     force_read_error;
 118         int                     force_write_error;
 119         int                     periodic_read_error;
 120         int                     periodic_read_count;
 121 #endif
 122 #ifdef CAM_IO_STATS
 123         struct sysctl_ctx_list  sysctl_stats_ctx;
 124         struct sysctl_oid       *sysctl_stats_tree;
 125         u_int                   timeouts;
 126         u_int                   errors;
 127         u_int                   invalidations;
 128 #endif
 129 };
 130
 131 struct nda_trim_request {
 132         struct nvme_dsm_range   dsm[NVME_MAX_DSM_TRIM / sizeof(struct nvme_dsm_range)];
 133         TAILQ_HEAD(, bio) bps;
 134 };
 135 _Static_assert(NVME_MAX_DSM_TRIM % sizeof(struct nvme_dsm_range) == 0,
 136     "NVME_MAX_DSM_TRIM must be an integral number of ranges");
 137
 138 /* Need quirk table */
 139
 140 static  disk_strategy_t ndastrategy;
 141 static  dumper_t        ndadump;
 142 static  periph_init_t   ndainit;
 143 static  void            ndaasync(void *callback_arg, u_int32_t code,
 144                                 struct cam_path *path, void *arg);
 145 static  void            ndasysctlinit(void *context, int pending);
 146 static  periph_ctor_t   ndaregister;
 147 static  periph_dtor_t   ndacleanup;
 148 static  periph_start_t  ndastart;
 149 static  periph_oninv_t  ndaoninvalidate;
 150 static  void            ndadone(struct cam_periph *periph,
 151                                union ccb *done_ccb);
 152 static  int             ndaerror(union ccb *ccb, u_int32_t cam_flags,
 153                                 u_int32_t sense_flags);
 154 static void             ndashutdown(void *arg, int howto);
 155 static void             ndasuspend(void *arg);
 156
 157 #ifndef NDA_DEFAULT_SEND_ORDERED
 158 #define NDA_DEFAULT_SEND_ORDERED        1
 159 #endif
 160 #ifndef NDA_DEFAULT_TIMEOUT
 161 #define NDA_DEFAULT_TIMEOUT 30  /* Timeout in seconds */
 162 #endif
 163 #ifndef NDA_DEFAULT_RETRY
 164 #define NDA_DEFAULT_RETRY       4
 165 #endif
 166 #ifndef NDA_MAX_TRIM_ENTRIES
 167 #define NDA_MAX_TRIM_ENTRIES  (NVME_MAX_DSM_TRIM / sizeof(struct nvme_dsm_range))/* Number of DSM trims to use, max 256 */
 168 #endif
 169
 170 static SYSCTL_NODE(_kern_cam, OID_AUTO, nda, CTLFLAG_RD, 0,
 171             "CAM Direct Access Disk driver");
 172
 173 //static int nda_retry_count = NDA_DEFAULT_RETRY;
 174 static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED;
 175 static int nda_default_timeout = NDA_DEFAULT_TIMEOUT;
 176 static int nda_max_trim_entries = NDA_MAX_TRIM_ENTRIES;
 177 SYSCTL_INT(_kern_cam_nda, OID_AUTO, max_trim, CTLFLAG_RDTUN,
 178     &nda_max_trim_entries, NDA_MAX_TRIM_ENTRIES,
 179     "Maximum number of BIO_DELETE to send down as a DSM TRIM.");
 180
 181 /*
 182  * All NVMe media is non-rotational, so all nvme device instances
 183  * share this to implement the sysctl.
 184  */
 185 static int nda_rotating_media = 0;
 186
 187 static struct periph_driver ndadriver =
 188 {
 189         ndainit, "nda",
 190         TAILQ_HEAD_INITIALIZER(ndadriver.units), /* generation */ 0
 191 };
 192
 193 PERIPHDRIVER_DECLARE(nda, ndadriver);
 194
 195 static MALLOC_DEFINE(M_NVMEDA, "nvme_da", "nvme_da buffers");
 196
 197 /*
 198  * nice wrappers. Maybe these belong in nvme_all.c instead of
 199  * here, but this is the only place that uses these. Should
 200  * we ever grow another NVME periph, we should move them
 201  * all there wholesale.
 202  */
 203
 204 static void
 205 nda_nvme_flush(struct nda_softc *softc, struct ccb_nvmeio *nvmeio)
 206 {
 207         cam_fill_nvmeio(nvmeio,
 208             0,                  /* retries */
 209             ndadone,            /* cbfcnp */
 210             CAM_DIR_NONE,       /* flags */
 211             NULL,               /* data_ptr */
 212             0,                  /* dxfer_len */
 213             nda_default_timeout * 1000); /* timeout 30s */
 214         nvme_ns_flush_cmd(&nvmeio->cmd, softc->nsid);
 215 }
 216
 217 static void
 218 nda_nvme_trim(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
 219     void *payload, uint32_t num_ranges)
 220 {
 221         cam_fill_nvmeio(nvmeio,
 222             0,                  /* retries */
 223             ndadone,            /* cbfcnp */
 224             CAM_DIR_OUT,        /* flags */
 225             payload,            /* data_ptr */
 226             num_ranges * sizeof(struct nvme_dsm_range), /* dxfer_len */
 227             nda_default_timeout * 1000); /* timeout 30s */
 228         nvme_ns_trim_cmd(&nvmeio->cmd, softc->nsid, num_ranges);
 229 }
 230
 231 static void
 232 nda_nvme_write(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
 233     void *payload, uint64_t lba, uint32_t len, uint32_t count)
 234 {
 235         cam_fill_nvmeio(nvmeio,
 236             0,                  /* retries */
 237             ndadone,            /* cbfcnp */
 238             CAM_DIR_OUT,        /* flags */
 239             payload,            /* data_ptr */
 240             len,                /* dxfer_len */
 241             nda_default_timeout * 1000); /* timeout 30s */
 242         nvme_ns_write_cmd(&nvmeio->cmd, softc->nsid, lba, count);
 243 }
 244
 245 static void
 246 nda_nvme_rw_bio(struct nda_softc *softc, struct ccb_nvmeio *nvmeio,
 247     struct bio *bp, uint32_t rwcmd)
 248 {
 249         int flags = rwcmd == NVME_OPC_READ ? CAM_DIR_IN : CAM_DIR_OUT;
 250         void *payload;
 251         uint64_t lba;
 252         uint32_t count;
 253
 254         if (bp->bio_flags & BIO_UNMAPPED) {
 255                 flags |= CAM_DATA_BIO;
 256                 payload = bp;
 257         } else {
 258                 payload = bp->bio_data;
 259         }
 260
 261         lba = bp->bio_pblkno;
 262         count = bp->bio_bcount / softc->disk->d_sectorsize;
 263
 264         cam_fill_nvmeio(nvmeio,
 265             0,                  /* retries */
 266             ndadone,            /* cbfcnp */
 267             flags,              /* flags */
 268             payload,            /* data_ptr */
 269             bp->bio_bcount,     /* dxfer_len */
 270             nda_default_timeout * 1000); /* timeout 30s */
 271         nvme_ns_rw_cmd(&nvmeio->cmd, rwcmd, softc->nsid, lba, count);
 272 }
 273
 274 static int
 275 ndaopen(struct disk *dp)
 276 {
 277         struct cam_periph *periph;
 278         struct nda_softc *softc;
 279         int error;
 280
 281         periph = (struct cam_periph *)dp->d_drv1;
 282         if (cam_periph_acquire(periph) != 0) {
 283                 return(ENXIO);
 284         }
 285
 286         cam_periph_lock(periph);
 287         if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
 288                 cam_periph_unlock(periph);
 289                 cam_periph_release(periph);
 290                 return (error);
 291         }
 292
 293         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH,
 294             ("ndaopen\n"));
 295
 296         softc = (struct nda_softc *)periph->softc;
 297         softc->flags |= NDA_FLAG_OPEN;
 298
 299         cam_periph_unhold(periph);
 300         cam_periph_unlock(periph);
 301         return (0);
 302 }
 303
 304 static int
 305 ndaclose(struct disk *dp)
 306 {
 307         struct  cam_periph *periph;
 308         struct  nda_softc *softc;
 309         union ccb *ccb;
 310         int error;
 311
 312         periph = (struct cam_periph *)dp->d_drv1;
 313         softc = (struct nda_softc *)periph->softc;
 314         cam_periph_lock(periph);
 315
 316         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH,
 317             ("ndaclose\n"));
 318
 319         if ((softc->flags & NDA_FLAG_DIRTY) != 0 &&
 320             (periph->flags & CAM_PERIPH_INVALID) == 0 &&
 321             cam_periph_hold(periph, PRIBIO) == 0) {
 322
 323                 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 324                 nda_nvme_flush(softc, &ccb->nvmeio);
 325                 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0,
 326                     /*sense_flags*/0, softc->disk->d_devstat);
 327
 328                 if (error != 0)
 329                         xpt_print(periph->path, "Synchronize cache failed\n");
 330                 else
 331                         softc->flags &= ~NDA_FLAG_DIRTY;
 332                 xpt_release_ccb(ccb);
 333                 cam_periph_unhold(periph);
 334         }
 335
 336         softc->flags &= ~NDA_FLAG_OPEN;
 337
 338         while (softc->refcount != 0)
 339                 cam_periph_sleep(periph, &softc->refcount, PRIBIO, "ndaclose", 1);
 340         KASSERT(softc->outstanding_cmds == 0,
 341             ("nda %d outstanding commands", softc->outstanding_cmds));
 342         cam_periph_unlock(periph);
 343         cam_periph_release(periph);
 344         return (0);
 345 }
 346
 347 static void
 348 ndaschedule(struct cam_periph *periph)
 349 {
 350         struct nda_softc *softc = (struct nda_softc *)periph->softc;
 351
 352         if (softc->state != NDA_STATE_NORMAL)
 353                 return;
 354
 355         cam_iosched_schedule(softc->cam_iosched, periph);
 356 }
 357
 358 /*
 359  * Actually translate the requested transfer into one the physical driver
 360  * can understand.  The transfer is described by a buf and will include
 361  * only one physical transfer.
 362  */
 363 static void
 364 ndastrategy(struct bio *bp)
 365 {
 366         struct cam_periph *periph;
 367         struct nda_softc *softc;
 368
 369         periph = (struct cam_periph *)bp->bio_disk->d_drv1;
 370         softc = (struct nda_softc *)periph->softc;
 371
 372         cam_periph_lock(periph);
 373
 374         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastrategy(%p)\n", bp));
 375
 376         /*
 377          * If the device has been made invalid, error out
 378          */
 379         if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
 380                 cam_periph_unlock(periph);
 381                 biofinish(bp, NULL, ENXIO);
 382                 return;
 383         }
 384
 385         if (bp->bio_cmd == BIO_DELETE)
 386                 softc->deletes++;
 387
 388         /*
 389          * Place it in the queue of disk activities for this disk
 390          */
 391         cam_iosched_queue_work(softc->cam_iosched, bp);
 392
 393         /*
 394          * Schedule ourselves for performing the work.
 395          */
 396         ndaschedule(periph);
 397         cam_periph_unlock(periph);
 398
 399         return;
 400 }
 401
 402 static int
 403 ndadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
 404 {
 405         struct      cam_periph *periph;
 406         struct      nda_softc *softc;
 407         u_int       secsize;
 408         struct ccb_nvmeio nvmeio;
 409         struct      disk *dp;
 410         uint64_t    lba;
 411         uint32_t    count;
 412         int         error = 0;
 413
 414         dp = arg;
 415         periph = dp->d_drv1;
 416         softc = (struct nda_softc *)periph->softc;
 417         secsize = softc->disk->d_sectorsize;
 418         lba = offset / secsize;
 419         count = length / secsize;
 420
 421         if ((periph->flags & CAM_PERIPH_INVALID) != 0)
 422                 return (ENXIO);
 423
 424         /* xpt_get_ccb returns a zero'd allocation for the ccb, mimic that here */
 425         memset(&nvmeio, 0, sizeof(nvmeio));
 426         if (length > 0) {
 427                 xpt_setup_ccb(&nvmeio.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 428                 nvmeio.ccb_state = NDA_CCB_DUMP;
 429                 nda_nvme_write(softc, &nvmeio, virtual, lba, length, count);
 430                 error = cam_periph_runccb((union ccb *)&nvmeio, cam_periph_error,
 431                     0, SF_NO_RECOVERY | SF_NO_RETRY, NULL);
 432                 if (error != 0)
 433                         printf("Aborting dump due to I/O error %d.\n", error);
 434
 435                 return (error);
 436         }
 437
 438         /* Flush */
 439         xpt_setup_ccb(&nvmeio.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 440
 441         nvmeio.ccb_state = NDA_CCB_DUMP;
 442         nda_nvme_flush(softc, &nvmeio);
 443         error = cam_periph_runccb((union ccb *)&nvmeio, cam_periph_error,
 444             0, SF_NO_RECOVERY | SF_NO_RETRY, NULL);
 445         if (error != 0)
 446                 xpt_print(periph->path, "flush cmd failed\n");
 447         return (error);
 448 }
 449
 450 static void
 451 ndainit(void)
 452 {
 453         cam_status status;
 454
 455         /*
 456          * Install a global async callback.  This callback will
 457          * receive async callbacks like "new device found".
 458          */
 459         status = xpt_register_async(AC_FOUND_DEVICE, ndaasync, NULL, NULL);
 460
 461         if (status != CAM_REQ_CMP) {
 462                 printf("nda: Failed to attach master async callback "
 463                        "due to status 0x%x!\n", status);
 464         } else if (nda_send_ordered) {
 465
 466                 /* Register our event handlers */
 467                 if ((EVENTHANDLER_REGISTER(power_suspend, ndasuspend,
 468                                            NULL, EVENTHANDLER_PRI_LAST)) == NULL)
 469                     printf("ndainit: power event registration failed!\n");
 470                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, ndashutdown,
 471                                            NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
 472                     printf("ndainit: shutdown event registration failed!\n");
 473         }
 474 }
 475
 476 /*
 477  * Callback from GEOM, called when it has finished cleaning up its
 478  * resources.
 479  */
 480 static void
 481 ndadiskgonecb(struct disk *dp)
 482 {
 483         struct cam_periph *periph;
 484
 485         periph = (struct cam_periph *)dp->d_drv1;
 486
 487         cam_periph_release(periph);
 488 }
 489
 490 static void
 491 ndaoninvalidate(struct cam_periph *periph)
 492 {
 493         struct nda_softc *softc;
 494
 495         softc = (struct nda_softc *)periph->softc;
 496
 497         /*
 498          * De-register any async callbacks.
 499          */
 500         xpt_register_async(0, ndaasync, periph, periph->path);
 501 #ifdef CAM_IO_STATS
 502         softc->invalidations++;
 503 #endif
 504
 505         /*
 506          * Return all queued I/O with ENXIO.
 507          * XXX Handle any transactions queued to the card
 508          *     with XPT_ABORT_CCB.
 509          */
 510         cam_iosched_flush(softc->cam_iosched, NULL, ENXIO);
 511
 512         disk_gone(softc->disk);
 513 }
 514
 515 static void
 516 ndacleanup(struct cam_periph *periph)
 517 {
 518         struct nda_softc *softc;
 519
 520         softc = (struct nda_softc *)periph->softc;
 521
 522         cam_periph_unlock(periph);
 523
 524         cam_iosched_fini(softc->cam_iosched);
 525
 526         /*
 527          * If we can't free the sysctl tree, oh well...
 528          */
 529         if ((softc->flags & NDA_FLAG_SCTX_INIT) != 0) {
 530 #ifdef CAM_IO_STATS
 531                 if (sysctl_ctx_free(&softc->sysctl_stats_ctx) != 0)
 532                         xpt_print(periph->path,
 533                             "can't remove sysctl stats context\n");
 534 #endif
 535                 if (sysctl_ctx_free(&softc->sysctl_ctx) != 0)
 536                         xpt_print(periph->path,
 537                             "can't remove sysctl context\n");
 538         }
 539
 540         disk_destroy(softc->disk);
 541         free(softc, M_DEVBUF);
 542         cam_periph_lock(periph);
 543 }
 544
 545 static void
 546 ndaasync(void *callback_arg, u_int32_t code,
 547         struct cam_path *path, void *arg)
 548 {
 549         struct cam_periph *periph;
 550
 551         periph = (struct cam_periph *)callback_arg;
 552         switch (code) {
 553         case AC_FOUND_DEVICE:
 554         {
 555                 struct ccb_getdev *cgd;
 556                 cam_status status;
 557
 558                 cgd = (struct ccb_getdev *)arg;
 559                 if (cgd == NULL)
 560                         break;
 561
 562                 if (cgd->protocol != PROTO_NVME)
 563                         break;
 564
 565                 /*
 566                  * Allocate a peripheral instance for
 567                  * this device and start the probe
 568                  * process.
 569                  */
 570                 status = cam_periph_alloc(ndaregister, ndaoninvalidate,
 571                                           ndacleanup, ndastart,
 572                                           "nda", CAM_PERIPH_BIO,
 573                                           path, ndaasync,
 574                                           AC_FOUND_DEVICE, cgd);
 575
 576                 if (status != CAM_REQ_CMP
 577                  && status != CAM_REQ_INPROG)
 578                         printf("ndaasync: Unable to attach to new device "
 579                                 "due to status 0x%x\n", status);
 580                 break;
 581         }
 582         case AC_ADVINFO_CHANGED:
 583         {
 584                 uintptr_t buftype;
 585
 586                 buftype = (uintptr_t)arg;
 587                 if (buftype == CDAI_TYPE_PHYS_PATH) {
 588                         struct nda_softc *softc;
 589
 590                         softc = periph->softc;
 591                         disk_attr_changed(softc->disk, "GEOM::physpath",
 592                                           M_NOWAIT);
 593                 }
 594                 break;
 595         }
 596         case AC_LOST_DEVICE:
 597         default:
 598                 cam_periph_async(periph, code, path, arg);
 599                 break;
 600         }
 601 }
 602
 603 static void
 604 ndasysctlinit(void *context, int pending)
 605 {
 606         struct cam_periph *periph;
 607         struct nda_softc *softc;
 608         char tmpstr[32], tmpstr2[16];
 609
 610         periph = (struct cam_periph *)context;
 611
 612         /* periph was held for us when this task was enqueued */
 613         if ((periph->flags & CAM_PERIPH_INVALID) != 0) {
 614                 cam_periph_release(periph);
 615                 return;
 616         }
 617
 618         softc = (struct nda_softc *)periph->softc;
 619         snprintf(tmpstr, sizeof(tmpstr), "CAM NDA unit %d", periph->unit_number);
 620         snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
 621
 622         sysctl_ctx_init(&softc->sysctl_ctx);
 623         softc->flags |= NDA_FLAG_SCTX_INIT;
 624         softc->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&softc->sysctl_ctx,
 625                 SYSCTL_STATIC_CHILDREN(_kern_cam_nda), OID_AUTO, tmpstr2,
 626                 CTLFLAG_RD, 0, tmpstr, "device_index");
 627         if (softc->sysctl_tree == NULL) {
 628                 printf("ndasysctlinit: unable to allocate sysctl tree\n");
 629                 cam_periph_release(periph);
 630                 return;
 631         }
 632
 633         SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
 634             OID_AUTO, "unmapped_io", CTLFLAG_RD,
 635             &softc->unmappedio, 0, "Unmapped I/O leaf");
 636
 637         SYSCTL_ADD_QUAD(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
 638             OID_AUTO, "deletes", CTLFLAG_RD,
 639             &softc->deletes, "Number of BIO_DELETE requests");
 640
 641         SYSCTL_ADD_UQUAD(&softc->sysctl_ctx,
 642                 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
 643                 "trim_count", CTLFLAG_RD, &softc->trim_count,
 644                 "Total number of unmap/dsm commands sent");
 645         SYSCTL_ADD_UQUAD(&softc->sysctl_ctx,
 646                 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
 647                 "trim_ranges", CTLFLAG_RD, &softc->trim_ranges,
 648                 "Total number of ranges in unmap/dsm commands");
 649         SYSCTL_ADD_UQUAD(&softc->sysctl_ctx,
 650                 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO,
 651                 "trim_lbas", CTLFLAG_RD, &softc->trim_lbas,
 652                 "Total lbas in the unmap/dsm commands sent");
 653
 654         SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
 655             OID_AUTO, "rotating", CTLFLAG_RD, &nda_rotating_media, 1,
 656             "Rotating media");
 657
 658 #ifdef CAM_IO_STATS
 659         softc->sysctl_stats_tree = SYSCTL_ADD_NODE(&softc->sysctl_stats_ctx,
 660                 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, "stats",
 661                 CTLFLAG_RD, 0, "Statistics");
 662         if (softc->sysctl_stats_tree == NULL) {
 663                 printf("ndasysctlinit: unable to allocate sysctl tree for stats\n");
 664                 cam_periph_release(periph);
 665                 return;
 666         }
 667         SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
 668                 SYSCTL_CHILDREN(softc->sysctl_stats_tree),
 669                 OID_AUTO, "timeouts", CTLFLAG_RD,
 670                 &softc->timeouts, 0,
 671                 "Device timeouts reported by the SIM");
 672         SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
 673                 SYSCTL_CHILDREN(softc->sysctl_stats_tree),
 674                 OID_AUTO, "errors", CTLFLAG_RD,
 675                 &softc->errors, 0,
 676                 "Transport errors reported by the SIM.");
 677         SYSCTL_ADD_INT(&softc->sysctl_stats_ctx,
 678                 SYSCTL_CHILDREN(softc->sysctl_stats_tree),
 679                 OID_AUTO, "pack_invalidations", CTLFLAG_RD,
 680                 &softc->invalidations, 0,
 681                 "Device pack invalidations.");
 682 #endif
 683
 684 #ifdef CAM_TEST_FAILURE
 685         SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree),
 686                 OID_AUTO, "invalidate", CTLTYPE_U64 | CTLFLAG_RW | CTLFLAG_MPSAFE,
 687                 periph, 0, cam_periph_invalidate_sysctl, "I",
 688                 "Write 1 to invalidate the drive immediately");
 689 #endif
 690
 691         cam_iosched_sysctl_init(softc->cam_iosched, &softc->sysctl_ctx,
 692             softc->sysctl_tree);
 693
 694         cam_periph_release(periph);
 695 }
 696
 697 static int
 698 ndagetattr(struct bio *bp)
 699 {
 700         int ret;
 701         struct cam_periph *periph;
 702
 703         periph = (struct cam_periph *)bp->bio_disk->d_drv1;
 704         cam_periph_lock(periph);
 705         ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute,
 706             periph->path);
 707         cam_periph_unlock(periph);
 708         if (ret == 0)
 709                 bp->bio_completed = bp->bio_length;
 710         return ret;
 711 }
 712
 713 static cam_status
 714 ndaregister(struct cam_periph *periph, void *arg)
 715 {
 716         struct nda_softc *softc;
 717         struct disk *disk;
 718         struct ccb_pathinq cpi;
 719         const struct nvme_namespace_data *nsd;
 720         const struct nvme_controller_data *cd;
 721         char   announce_buf[80];
 722         uint8_t flbas_fmt, lbads, vwc_present;
 723         u_int maxio;
 724         int quirks;
 725
 726         nsd = nvme_get_identify_ns(periph);
 727         cd = nvme_get_identify_cntrl(periph);
 728
 729         softc = (struct nda_softc *)malloc(sizeof(*softc), M_DEVBUF,
 730             M_NOWAIT | M_ZERO);
 731
 732         if (softc == NULL) {
 733                 printf("ndaregister: Unable to probe new device. "
 734                     "Unable to allocate softc\n");
 735                 return(CAM_REQ_CMP_ERR);
 736         }
 737
 738         if (cam_iosched_init(&softc->cam_iosched, periph) != 0) {
 739                 printf("ndaregister: Unable to probe new device. "
 740                        "Unable to allocate iosched memory\n");
 741                 free(softc, M_DEVBUF);
 742                 return(CAM_REQ_CMP_ERR);
 743         }
 744
 745         /* ident_data parsing */
 746
 747         periph->softc = softc;
 748
 749         softc->quirks = NDA_Q_NONE;
 750
 751         xpt_path_inq(&cpi, periph->path);
 752
 753         TASK_INIT(&softc->sysctl_task, 0, ndasysctlinit, periph);
 754
 755         /*
 756          * The name space ID is the lun, save it for later I/O
 757          */
 758         softc->nsid = (uint32_t)xpt_path_lun_id(periph->path);
 759
 760         /*
 761          * Register this media as a disk
 762          */
 763         (void)cam_periph_hold(periph, PRIBIO);
 764         cam_periph_unlock(periph);
 765         snprintf(announce_buf, sizeof(announce_buf),
 766             "kern.cam.nda.%d.quirks", periph->unit_number);
 767         quirks = softc->quirks;
 768         TUNABLE_INT_FETCH(announce_buf, &quirks);
 769         softc->quirks = quirks;
 770         cam_iosched_set_sort_queue(softc->cam_iosched, 0);
 771         softc->disk = disk = disk_alloc();
 772         disk->d_rotation_rate = DISK_RR_NON_ROTATING;
 773         disk->d_open = ndaopen;
 774         disk->d_close = ndaclose;
 775         disk->d_strategy = ndastrategy;
 776         disk->d_getattr = ndagetattr;
 777         disk->d_dump = ndadump;
 778         disk->d_gone = ndadiskgonecb;
 779         disk->d_name = "nda";
 780         disk->d_drv1 = periph;
 781         disk->d_unit = periph->unit_number;
 782         maxio = cpi.maxio;              /* Honor max I/O size of SIM */
 783         if (maxio == 0)
 784                 maxio = DFLTPHYS;       /* traditional default */
 785         else if (maxio > MAXPHYS)
 786                 maxio = MAXPHYS;        /* for safety */
 787         disk->d_maxsize = maxio;
 788         flbas_fmt = (nsd->flbas >> NVME_NS_DATA_FLBAS_FORMAT_SHIFT) &
 789                 NVME_NS_DATA_FLBAS_FORMAT_MASK;
 790         lbads = (nsd->lbaf[flbas_fmt] >> NVME_NS_DATA_LBAF_LBADS_SHIFT) &
 791                 NVME_NS_DATA_LBAF_LBADS_MASK;
 792         disk->d_sectorsize = 1 << lbads;
 793         disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze);
 794         disk->d_delmaxsize = disk->d_mediasize;
 795         disk->d_flags = DISKFLAG_DIRECT_COMPLETION;
 796         if (nvme_ctrlr_has_dataset_mgmt(cd))
 797                 disk->d_flags |= DISKFLAG_CANDELETE;
 798         vwc_present = (cd->vwc >> NVME_CTRLR_DATA_VWC_PRESENT_SHIFT) &
 799                 NVME_CTRLR_DATA_VWC_PRESENT_MASK;
 800         if (vwc_present)
 801                 disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
 802         if ((cpi.hba_misc & PIM_UNMAPPED) != 0) {
 803                 disk->d_flags |= DISKFLAG_UNMAPPED_BIO;
 804                 softc->unmappedio = 1;
 805         }
 806         /*
 807          * d_ident and d_descr are both far bigger than the length of either
 808          *  the serial or model number strings.
 809          */
 810         cam_strvis(disk->d_descr, cd->mn,
 811             sizeof(disk->d_descr), NVME_MODEL_NUMBER_LENGTH);
 812         cam_strvis(disk->d_ident, cd->sn,
 813             sizeof(disk->d_ident), NVME_SERIAL_NUMBER_LENGTH);
 814         disk->d_hba_vendor = cpi.hba_vendor;
 815         disk->d_hba_device = cpi.hba_device;
 816         disk->d_hba_subvendor = cpi.hba_subvendor;
 817         disk->d_hba_subdevice = cpi.hba_subdevice;
 818         snprintf(disk->d_attachment, sizeof(disk->d_attachment),
 819             "%s%d", cpi.dev_name, cpi.unit_number);
 820         disk->d_stripesize = disk->d_sectorsize;
 821         disk->d_stripeoffset = 0;
 822         disk->d_devstat = devstat_new_entry(periph->periph_name,
 823             periph->unit_number, disk->d_sectorsize,
 824             DEVSTAT_ALL_SUPPORTED,
 825             DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport),
 826             DEVSTAT_PRIORITY_DISK);
 827         /*
 828          * Add alias for older nvd drives to ease transition.
 829          */
 830         /* disk_add_alias(disk, "nvd"); Have reports of this causing problems */
 831
 832         /*
 833          * Acquire a reference to the periph before we register with GEOM.
 834          * We'll release this reference once GEOM calls us back (via
 835          * ndadiskgonecb()) telling us that our provider has been freed.
 836          */
 837         if (cam_periph_acquire(periph) != 0) {
 838                 xpt_print(periph->path, "%s: lost periph during "
 839                           "registration!\n", __func__);
 840                 cam_periph_lock(periph);
 841                 return (CAM_REQ_CMP_ERR);
 842         }
 843         disk_create(softc->disk, DISK_VERSION);
 844         cam_periph_lock(periph);
 845         cam_periph_unhold(periph);
 846
 847         snprintf(announce_buf, sizeof(announce_buf),
 848                 "%juMB (%ju %u byte sectors)",
 849             (uintmax_t)((uintmax_t)disk->d_mediasize / (1024*1024)),
 850                 (uintmax_t)disk->d_mediasize / disk->d_sectorsize,
 851                 disk->d_sectorsize);
 852         xpt_announce_periph(periph, announce_buf);
 853         xpt_announce_quirks(periph, softc->quirks, NDA_Q_BIT_STRING);
 854
 855         /*
 856          * Create our sysctl variables, now that we know
 857          * we have successfully attached.
 858          */
 859         if (cam_periph_acquire(periph) == 0)
 860                 taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task);
 861
 862         /*
 863          * Register for device going away and info about the drive
 864          * changing (though with NVMe, it can't)
 865          */
 866         xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED,
 867             ndaasync, periph, periph->path);
 868
 869         softc->state = NDA_STATE_NORMAL;
 870         return(CAM_REQ_CMP);
 871 }
 872
 873 static void
 874 ndastart(struct cam_periph *periph, union ccb *start_ccb)
 875 {
 876         struct nda_softc *softc = (struct nda_softc *)periph->softc;
 877         struct ccb_nvmeio *nvmeio = &start_ccb->nvmeio;
 878
 879         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart\n"));
 880
 881         switch (softc->state) {
 882         case NDA_STATE_NORMAL:
 883         {
 884                 struct bio *bp;
 885
 886                 bp = cam_iosched_next_bio(softc->cam_iosched);
 887                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart: bio %p\n", bp));
 888                 if (bp == NULL) {
 889                         xpt_release_ccb(start_ccb);
 890                         break;
 891                 }
 892
 893                 switch (bp->bio_cmd) {
 894                 case BIO_WRITE:
 895                         softc->flags |= NDA_FLAG_DIRTY;
 896                         /* FALLTHROUGH */
 897                 case BIO_READ:
 898                 {
 899 #ifdef CAM_TEST_FAILURE
 900                         int fail = 0;
 901
 902                         /*
 903                          * Support the failure ioctls.  If the command is a
 904                          * read, and there are pending forced read errors, or
 905                          * if a write and pending write errors, then fail this
 906                          * operation with EIO.  This is useful for testing
 907                          * purposes.  Also, support having every Nth read fail.
 908                          *
 909                          * This is a rather blunt tool.
 910                          */
 911                         if (bp->bio_cmd == BIO_READ) {
 912                                 if (softc->force_read_error) {
 913                                         softc->force_read_error--;
 914                                         fail = 1;
 915                                 }
 916                                 if (softc->periodic_read_error > 0) {
 917                                         if (++softc->periodic_read_count >=
 918                                             softc->periodic_read_error) {
 919                                                 softc->periodic_read_count = 0;
 920                                                 fail = 1;
 921                                         }
 922                                 }
 923                         } else {
 924                                 if (softc->force_write_error) {
 925                                         softc->force_write_error--;
 926                                         fail = 1;
 927                                 }
 928                         }
 929                         if (fail) {
 930                                 biofinish(bp, NULL, EIO);
 931                                 xpt_release_ccb(start_ccb);
 932                                 ndaschedule(periph);
 933                                 return;
 934                         }
 935 #endif
 936                         KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 ||
 937                             round_page(bp->bio_bcount + bp->bio_ma_offset) /
 938                             PAGE_SIZE == bp->bio_ma_n,
 939                             ("Short bio %p", bp));
 940                         nda_nvme_rw_bio(softc, &start_ccb->nvmeio, bp, bp->bio_cmd == BIO_READ ?
 941                             NVME_OPC_READ : NVME_OPC_WRITE);
 942                         break;
 943                 }
 944                 case BIO_DELETE:
 945                 {
 946                         struct nvme_dsm_range *dsm_range, *dsm_end;
 947                         struct nda_trim_request *trim;
 948                         struct bio *bp1;
 949                         int ents;
 950                         uint32_t totalcount = 0, ranges = 0;
 951
 952                         trim = malloc(sizeof(*trim), M_NVMEDA, M_ZERO | M_NOWAIT);
 953                         if (trim == NULL) {
 954                                 biofinish(bp, NULL, ENOMEM);
 955                                 xpt_release_ccb(start_ccb);
 956                                 ndaschedule(periph);
 957                                 return;
 958                         }
 959                         TAILQ_INIT(&trim->bps);
 960                         bp1 = bp;
 961                         ents = min(nitems(trim->dsm), nda_max_trim_entries);
 962                         dsm_range = trim->dsm;
 963                         dsm_end = dsm_range + ents;
 964                         do {
 965                                 TAILQ_INSERT_TAIL(&trim->bps, bp1, bio_queue);
 966                                 dsm_range->length =
 967                                     htole32(bp1->bio_bcount / softc->disk->d_sectorsize);
 968                                 dsm_range->starting_lba =
 969                                     htole64(bp1->bio_offset / softc->disk->d_sectorsize);
 970                                 ranges++;
 971                                 totalcount += dsm_range->length;
 972                                 dsm_range++;
 973                                 if (dsm_range >= dsm_end)
 974                                         break;
 975                                 bp1 = cam_iosched_next_trim(softc->cam_iosched);
 976                                 /* XXX -- Could collapse adjacent ranges, but we don't for now */
 977                                 /* XXX -- Could limit based on total payload size */
 978                         } while (bp1 != NULL);
 979                         start_ccb->ccb_trim = trim;
 980                         nda_nvme_trim(softc, &start_ccb->nvmeio, trim->dsm,
 981                             dsm_range - trim->dsm);
 982                         start_ccb->ccb_state = NDA_CCB_TRIM;
 983                         softc->trim_count++;
 984                         softc->trim_ranges += ranges;
 985                         softc->trim_lbas += totalcount;
 986                         /*
 987                          * Note: We can have multiple TRIMs in flight, so we don't call
 988                          * cam_iosched_submit_trim(softc->cam_iosched);
 989                          * since that forces the I/O scheduler to only schedule one at a time.
 990                          * On NVMe drives, this is a performance disaster.
 991                          */
 992                         goto out;
 993                 }
 994                 case BIO_FLUSH:
 995                         nda_nvme_flush(softc, nvmeio);
 996                         break;
 997                 }
 998                 start_ccb->ccb_state = NDA_CCB_BUFFER_IO;
 999                 start_ccb->ccb_bp = bp;
1000 out:
1001                 start_ccb->ccb_h.flags |= CAM_UNLOCKED;
1002                 softc->outstanding_cmds++;
1003                 softc->refcount++;                      /* For submission only */
1004                 cam_periph_unlock(periph);
1005                 xpt_action(start_ccb);
1006                 cam_periph_lock(periph);
1007                 softc->refcount--;                      /* Submission done */
1008
1009                 /* May have more work to do, so ensure we stay scheduled */
1010                 ndaschedule(periph);
1011                 break;
1012                 }
1013         }
1014 }
1015
1016 static void
1017 ndadone(struct cam_periph *periph, union ccb *done_ccb)
1018 {
1019         struct nda_softc *softc;
1020         struct ccb_nvmeio *nvmeio = &done_ccb->nvmeio;
1021         struct cam_path *path;
1022         int state;
1023
1024         softc = (struct nda_softc *)periph->softc;
1025         path = done_ccb->ccb_h.path;
1026
1027         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("ndadone\n"));
1028
1029         state = nvmeio->ccb_state & NDA_CCB_TYPE_MASK;
1030         switch (state) {
1031         case NDA_CCB_BUFFER_IO:
1032         case NDA_CCB_TRIM:
1033         {
1034                 int error;
1035
1036                 cam_periph_lock(periph);
1037                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1038                         error = ndaerror(done_ccb, 0, 0);
1039                         if (error == ERESTART) {
1040                                 /* A retry was scheduled, so just return. */
1041                                 cam_periph_unlock(periph);
1042                                 return;
1043                         }
1044                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1045                                 cam_release_devq(path,
1046                                                  /*relsim_flags*/0,
1047                                                  /*reduction*/0,
1048                                                  /*timeout*/0,
1049                                                  /*getcount_only*/0);
1050                 } else {
1051                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1052                                 panic("REQ_CMP with QFRZN");
1053                         error = 0;
1054                 }
1055                 if (state == NDA_CCB_BUFFER_IO) {
1056                         struct bio *bp;
1057
1058                         bp = (struct bio *)done_ccb->ccb_bp;
1059                         bp->bio_error = error;
1060                         if (error != 0) {
1061                                 bp->bio_resid = bp->bio_bcount;
1062                                 bp->bio_flags |= BIO_ERROR;
1063                         } else {
1064                                 bp->bio_resid = 0;
1065                         }
1066                         softc->outstanding_cmds--;
1067
1068                         /*
1069                          * We need to call cam_iosched before we call biodone so that we
1070                          * don't measure any activity that happens in the completion
1071                          * routine, which in the case of sendfile can be quite
1072                          * extensive.
1073                          */
1074                         cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb);
1075                         xpt_release_ccb(done_ccb);
1076                         ndaschedule(periph);
1077                         cam_periph_unlock(periph);
1078                         biodone(bp);
1079                 } else { /* state == NDA_CCB_TRIM */
1080                         struct nda_trim_request *trim;
1081                         struct bio *bp1, *bp2;
1082                         TAILQ_HEAD(, bio) queue;
1083
1084                         trim = nvmeio->ccb_trim;
1085                         TAILQ_INIT(&queue);
1086                         TAILQ_CONCAT(&queue, &trim->bps, bio_queue);
1087                         free(trim, M_NVMEDA);
1088
1089                         /*
1090                          * Since we can have multiple trims in flight, we don't
1091                          * need to call this here.
1092                          * cam_iosched_trim_done(softc->cam_iosched);
1093                          */
1094                         /*
1095                          * The the I/O scheduler that we're finishing the I/O
1096                          * so we can keep book. The first one we pass in the CCB
1097                          * which has the timing information. The rest we pass in NULL
1098                          * so we can keep proper counts.
1099                          */
1100                         bp1 = TAILQ_FIRST(&queue);
1101                         cam_iosched_bio_complete(softc->cam_iosched, bp1, done_ccb);
1102                         xpt_release_ccb(done_ccb);
1103                         softc->outstanding_cmds--;
1104                         ndaschedule(periph);
1105                         cam_periph_unlock(periph);
1106                         while ((bp2 = TAILQ_FIRST(&queue)) != NULL) {
1107                                 TAILQ_REMOVE(&queue, bp2, bio_queue);
1108                                 bp2->bio_error = error;
1109                                 if (error != 0) {
1110                                         bp2->bio_flags |= BIO_ERROR;
1111                                         bp2->bio_resid = bp1->bio_bcount;
1112                                 } else
1113                                         bp2->bio_resid = 0;
1114                                 if (bp1 != bp2)
1115                                         cam_iosched_bio_complete(softc->cam_iosched, bp2, NULL);
1116                                 biodone(bp2);
1117                         }
1118                 }
1119                 return;
1120         }
1121         case NDA_CCB_DUMP:
1122                 /* No-op.  We're polling */
1123                 return;
1124         default:
1125                 break;
1126         }
1127         xpt_release_ccb(done_ccb);
1128 }
1129
1130 static int
1131 ndaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1132 {
1133         struct nda_softc *softc;
1134         struct cam_periph *periph;
1135
1136         periph = xpt_path_periph(ccb->ccb_h.path);
1137         softc = (struct nda_softc *)periph->softc;
1138
1139         switch (ccb->ccb_h.status & CAM_STATUS_MASK) {
1140         case CAM_CMD_TIMEOUT:
1141 #ifdef CAM_IO_STATS
1142                 softc->timeouts++;
1143 #endif
1144                 break;
1145         case CAM_REQ_ABORTED:
1146         case CAM_REQ_CMP_ERR:
1147         case CAM_REQ_TERMIO:
1148         case CAM_UNREC_HBA_ERROR:
1149         case CAM_DATA_RUN_ERR:
1150         case CAM_ATA_STATUS_ERROR:
1151 #ifdef CAM_IO_STATS
1152                 softc->errors++;
1153 #endif
1154                 break;
1155         default:
1156                 break;
1157         }
1158
1159         return(cam_periph_error(ccb, cam_flags, sense_flags));
1160 }
1161
1162 /*
1163  * Step through all NDA peripheral drivers, and if the device is still open,
1164  * sync the disk cache to physical media.
1165  */
1166 static void
1167 ndaflush(void)
1168 {
1169         struct cam_periph *periph;
1170         struct nda_softc *softc;
1171         union ccb *ccb;
1172         int error;
1173
1174         CAM_PERIPH_FOREACH(periph, &ndadriver) {
1175                 softc = (struct nda_softc *)periph->softc;
1176
1177                 if (SCHEDULER_STOPPED()) {
1178                         /*
1179                          * If we paniced with the lock held or the periph is not
1180                          * open, do not recurse.  Otherwise, call ndadump since
1181                          * that avoids the sleeping cam_periph_getccb does if no
1182                          * CCBs are available.
1183                          */
1184                         if (!cam_periph_owned(periph) &&
1185                             (softc->flags & NDA_FLAG_OPEN)) {
1186                                 ndadump(softc->disk, NULL, 0, 0, 0);
1187                         }
1188                         continue;
1189                 }
1190
1191                 /*
1192                  * We only sync the cache if the drive is still open
1193                  */
1194                 cam_periph_lock(periph);
1195                 if ((softc->flags & NDA_FLAG_OPEN) == 0) {
1196                         cam_periph_unlock(periph);
1197                         continue;
1198                 }
1199
1200                 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1201                 nda_nvme_flush(softc, &ccb->nvmeio);
1202                 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0,
1203                     /*sense_flags*/ SF_NO_RECOVERY | SF_NO_RETRY,
1204                     softc->disk->d_devstat);
1205                 if (error != 0)
1206                         xpt_print(periph->path, "Synchronize cache failed\n");
1207                 xpt_release_ccb(ccb);
1208                 cam_periph_unlock(periph);
1209         }
1210 }
1211
1212 static void
1213 ndashutdown(void *arg, int howto)
1214 {
1215
1216         ndaflush();
1217 }
1218
1219 static void
1220 ndasuspend(void *arg)
1221 {
1222
1223         ndaflush();
1224 }