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