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