1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2015 Netflix, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * Derived from ata_da.c: 28 * Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org> 29 */ 30 31 #include <sys/param.h> 32 33 #ifdef _KERNEL 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bio.h> 37 #include <sys/sysctl.h> 38 #include <sys/taskqueue.h> 39 #include <sys/lock.h> 40 #include <sys/mutex.h> 41 #include <sys/conf.h> 42 #include <sys/devicestat.h> 43 #include <sys/eventhandler.h> 44 #include <sys/malloc.h> 45 #include <sys/cons.h> 46 #include <sys/proc.h> 47 #include <sys/reboot.h> 48 #include <sys/sbuf.h> 49 #include <geom/geom.h> 50 #include <geom/geom_disk.h> 51 #endif /* _KERNEL */ 52 53 #ifndef _KERNEL 54 #include <stdio.h> 55 #include <string.h> 56 #endif /* _KERNEL */ 57 58 #include <cam/cam.h> 59 #include <cam/cam_ccb.h> 60 #include <cam/cam_periph.h> 61 #include <cam/cam_xpt_periph.h> 62 #include <cam/cam_sim.h> 63 #include <cam/cam_iosched.h> 64 65 #include <cam/nvme/nvme_all.h> 66 67 typedef enum { 68 NDA_STATE_NORMAL 69 } nda_state; 70 71 typedef enum { 72 NDA_FLAG_OPEN = 0x0001, 73 NDA_FLAG_DIRTY = 0x0002, 74 NDA_FLAG_SCTX_INIT = 0x0004, 75 } nda_flags; 76 #define NDA_FLAG_STRING \ 77 "\020" \ 78 "\001OPEN" \ 79 "\002DIRTY" \ 80 "\003SCTX_INIT" 81 82 typedef enum { 83 NDA_Q_4K = 0x01, 84 NDA_Q_NONE = 0x00, 85 } nda_quirks; 86 87 #define NDA_Q_BIT_STRING \ 88 "\020" \ 89 "\001Bit 0" 90 91 typedef enum { 92 NDA_CCB_BUFFER_IO = 0x01, 93 NDA_CCB_DUMP = 0x02, 94 NDA_CCB_TRIM = 0x03, 95 NDA_CCB_PASS = 0x04, 96 NDA_CCB_TYPE_MASK = 0x0F, 97 } nda_ccb_state; 98 99 /* Offsets into our private area for storing information */ 100 #define ccb_state ccb_h.ppriv_field0 101 #define ccb_bp ccb_h.ppriv_ptr1 /* For NDA_CCB_BUFFER_IO */ 102 #define ccb_trim ccb_h.ppriv_ptr1 /* For NDA_CCB_TRIM */ 103 104 struct nda_softc { 105 struct cam_iosched_softc *cam_iosched; 106 int outstanding_cmds; /* Number of active commands */ 107 int refcount; /* Active xpt_action() calls */ 108 nda_state state; 109 nda_flags flags; 110 nda_quirks quirks; 111 int unmappedio; 112 quad_t deletes; 113 uint32_t nsid; /* Namespace ID for this nda device */ 114 struct disk *disk; 115 struct task sysctl_task; 116 struct sysctl_ctx_list sysctl_ctx; 117 struct sysctl_oid *sysctl_tree; 118 uint64_t trim_count; 119 uint64_t trim_ranges; 120 uint64_t trim_lbas; 121 #ifdef CAM_TEST_FAILURE 122 int force_read_error; 123 int force_write_error; 124 int periodic_read_error; 125 int periodic_read_count; 126 #endif 127 #ifdef CAM_IO_STATS 128 struct sysctl_ctx_list sysctl_stats_ctx; 129 struct sysctl_oid *sysctl_stats_tree; 130 u_int timeouts; 131 u_int errors; 132 u_int invalidations; 133 #endif 134 }; 135 136 struct nda_trim_request { 137 struct nvme_dsm_range dsm[NVME_MAX_DSM_TRIM / sizeof(struct nvme_dsm_range)]; 138 TAILQ_HEAD(, bio) bps; 139 }; 140 _Static_assert(NVME_MAX_DSM_TRIM % sizeof(struct nvme_dsm_range) == 0, 141 "NVME_MAX_DSM_TRIM must be an integral number of ranges"); 142 143 /* Need quirk table */ 144 145 static disk_ioctl_t ndaioctl; 146 static disk_strategy_t ndastrategy; 147 static dumper_t ndadump; 148 static periph_init_t ndainit; 149 static void ndaasync(void *callback_arg, uint32_t code, 150 struct cam_path *path, void *arg); 151 static void ndasysctlinit(void *context, int pending); 152 static int ndaflagssysctl(SYSCTL_HANDLER_ARGS); 153 static periph_ctor_t ndaregister; 154 static periph_dtor_t ndacleanup; 155 static periph_start_t ndastart; 156 static periph_oninv_t ndaoninvalidate; 157 static void ndadone(struct cam_periph *periph, 158 union ccb *done_ccb); 159 static int ndaerror(union ccb *ccb, uint32_t cam_flags, 160 uint32_t sense_flags); 161 static void ndashutdown(void *arg, int howto); 162 static void ndasuspend(void *arg); 163 164 #ifndef NDA_DEFAULT_SEND_ORDERED 165 #define NDA_DEFAULT_SEND_ORDERED 1 166 #endif 167 #ifndef NDA_DEFAULT_TIMEOUT 168 #define NDA_DEFAULT_TIMEOUT 30 /* Timeout in seconds */ 169 #endif 170 #ifndef NDA_DEFAULT_RETRY 171 #define NDA_DEFAULT_RETRY 4 172 #endif 173 #ifndef NDA_MAX_TRIM_ENTRIES 174 #define NDA_MAX_TRIM_ENTRIES (NVME_MAX_DSM_TRIM / sizeof(struct nvme_dsm_range))/* Number of DSM trims to use, max 256 */ 175 #endif 176 177 static SYSCTL_NODE(_kern_cam, OID_AUTO, nda, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 178 "CAM Direct Access Disk driver"); 179 180 //static int nda_retry_count = NDA_DEFAULT_RETRY; 181 static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED; 182 static int nda_default_timeout = NDA_DEFAULT_TIMEOUT; 183 static int nda_max_trim_entries = NDA_MAX_TRIM_ENTRIES; 184 static int nda_enable_biospeedup = 1; 185 static int nda_nvd_compat = 1; 186 SYSCTL_INT(_kern_cam_nda, OID_AUTO, max_trim, CTLFLAG_RDTUN, 187 &nda_max_trim_entries, NDA_MAX_TRIM_ENTRIES, 188 "Maximum number of BIO_DELETE to send down as a DSM TRIM."); 189 SYSCTL_INT(_kern_cam_nda, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN, 190 &nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing."); 191 SYSCTL_INT(_kern_cam_nda, OID_AUTO, nvd_compat, CTLFLAG_RDTUN, 192 &nda_nvd_compat, 1, "Enable creation of nvd aliases."); 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 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 336 nda_nvme_flush(softc, &ccb->nvmeio); 337 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0, 338 /*sense_flags*/0, softc->disk->d_devstat); 339 340 if (error != 0) 341 xpt_print(periph->path, "Synchronize cache failed\n"); 342 else 343 softc->flags &= ~NDA_FLAG_DIRTY; 344 xpt_release_ccb(ccb); 345 cam_periph_unhold(periph); 346 } 347 348 softc->flags &= ~NDA_FLAG_OPEN; 349 350 while (softc->refcount != 0) 351 cam_periph_sleep(periph, &softc->refcount, PRIBIO, "ndaclose", 1); 352 KASSERT(softc->outstanding_cmds == 0, 353 ("nda %d outstanding commands", softc->outstanding_cmds)); 354 cam_periph_unlock(periph); 355 cam_periph_release(periph); 356 return (0); 357 } 358 359 static void 360 ndaschedule(struct cam_periph *periph) 361 { 362 struct nda_softc *softc = (struct nda_softc *)periph->softc; 363 364 if (softc->state != NDA_STATE_NORMAL) 365 return; 366 367 cam_iosched_schedule(softc->cam_iosched, periph); 368 } 369 370 static int 371 ndaioctl(struct disk *dp, u_long cmd, void *data, int fflag, 372 struct thread *td) 373 { 374 struct cam_periph *periph; 375 376 periph = (struct cam_periph *)dp->d_drv1; 377 378 switch (cmd) { 379 case NVME_IO_TEST: 380 case NVME_BIO_TEST: 381 /* 382 * These don't map well to the underlying CCBs, so 383 * they are usupported via CAM. 384 */ 385 return (ENOTTY); 386 case NVME_GET_NSID: 387 { 388 struct nvme_get_nsid *gnsid = (struct nvme_get_nsid *)data; 389 struct ccb_pathinq cpi; 390 391 xpt_path_inq(&cpi, periph->path); 392 strncpy(gnsid->cdev, cpi.xport_specific.nvme.dev_name, 393 sizeof(gnsid->cdev)); 394 gnsid->nsid = cpi.xport_specific.nvme.nsid; 395 return (0); 396 } 397 case NVME_PASSTHROUGH_CMD: 398 { 399 struct nvme_pt_command *pt; 400 union ccb *ccb; 401 struct cam_periph_map_info mapinfo; 402 u_int maxmap = dp->d_maxsize; 403 int error; 404 405 /* 406 * Create a NVME_IO CCB to do the passthrough command. 407 */ 408 pt = (struct nvme_pt_command *)data; 409 ccb = xpt_alloc_ccb(); 410 xpt_setup_ccb(&ccb->ccb_h, periph->path, CAM_PRIORITY_NORMAL); 411 ccb->ccb_state = NDA_CCB_PASS; 412 cam_fill_nvmeio(&ccb->nvmeio, 413 0, /* Retries */ 414 ndadone, 415 (pt->is_read ? CAM_DIR_IN : CAM_DIR_OUT) | CAM_DATA_VADDR, 416 pt->buf, 417 pt->len, 418 nda_default_timeout * 1000); 419 memcpy(&ccb->nvmeio.cmd, &pt->cmd, sizeof(pt->cmd)); 420 421 /* 422 * Wire the user memory in this request for the I/O 423 */ 424 memset(&mapinfo, 0, sizeof(mapinfo)); 425 error = cam_periph_mapmem(ccb, &mapinfo, maxmap); 426 if (error) 427 goto out; 428 429 /* 430 * Lock the periph and run the command. 431 */ 432 cam_periph_lock(periph); 433 cam_periph_runccb(ccb, NULL, CAM_RETRY_SELTO, 434 SF_RETRY_UA | SF_NO_PRINT, NULL); 435 436 /* 437 * Tear down mapping and return status. 438 */ 439 cam_periph_unlock(periph); 440 error = cam_periph_unmapmem(ccb, &mapinfo); 441 if (!cam_ccb_success(ccb)) 442 error = EIO; 443 out: 444 cam_periph_lock(periph); 445 xpt_release_ccb(ccb); 446 cam_periph_unlock(periph); 447 return (error); 448 } 449 default: 450 break; 451 } 452 return (ENOTTY); 453 } 454 455 /* 456 * Actually translate the requested transfer into one the physical driver 457 * can understand. The transfer is described by a buf and will include 458 * only one physical transfer. 459 */ 460 static void 461 ndastrategy(struct bio *bp) 462 { 463 struct cam_periph *periph; 464 struct nda_softc *softc; 465 466 periph = (struct cam_periph *)bp->bio_disk->d_drv1; 467 softc = (struct nda_softc *)periph->softc; 468 469 cam_periph_lock(periph); 470 471 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastrategy(%p)\n", bp)); 472 473 /* 474 * If the device has been made invalid, error out 475 */ 476 if ((periph->flags & CAM_PERIPH_INVALID) != 0) { 477 cam_periph_unlock(periph); 478 biofinish(bp, NULL, ENXIO); 479 return; 480 } 481 482 if (bp->bio_cmd == BIO_DELETE) 483 softc->deletes++; 484 485 /* 486 * Place it in the queue of disk activities for this disk 487 */ 488 cam_iosched_queue_work(softc->cam_iosched, bp); 489 490 /* 491 * Schedule ourselves for performing the work. 492 */ 493 ndaschedule(periph); 494 cam_periph_unlock(periph); 495 496 return; 497 } 498 499 static int 500 ndadump(void *arg, void *virtual, off_t offset, size_t length) 501 { 502 struct cam_periph *periph; 503 struct nda_softc *softc; 504 u_int secsize; 505 struct ccb_nvmeio nvmeio; 506 struct disk *dp; 507 uint64_t lba; 508 uint32_t count; 509 int error = 0; 510 511 dp = arg; 512 periph = dp->d_drv1; 513 softc = (struct nda_softc *)periph->softc; 514 secsize = softc->disk->d_sectorsize; 515 lba = offset / secsize; 516 count = length / secsize; 517 518 if ((periph->flags & CAM_PERIPH_INVALID) != 0) 519 return (ENXIO); 520 521 /* xpt_get_ccb returns a zero'd allocation for the ccb, mimic that here */ 522 memset(&nvmeio, 0, sizeof(nvmeio)); 523 if (length > 0) { 524 xpt_setup_ccb(&nvmeio.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 525 nvmeio.ccb_state = NDA_CCB_DUMP; 526 nda_nvme_write(softc, &nvmeio, virtual, lba, length, count); 527 error = cam_periph_runccb((union ccb *)&nvmeio, cam_periph_error, 528 0, SF_NO_RECOVERY | SF_NO_RETRY, NULL); 529 if (error != 0) 530 printf("Aborting dump due to I/O error %d.\n", error); 531 532 return (error); 533 } 534 535 /* Flush */ 536 xpt_setup_ccb(&nvmeio.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 537 538 nvmeio.ccb_state = NDA_CCB_DUMP; 539 nda_nvme_flush(softc, &nvmeio); 540 error = cam_periph_runccb((union ccb *)&nvmeio, cam_periph_error, 541 0, SF_NO_RECOVERY | SF_NO_RETRY, NULL); 542 if (error != 0) 543 xpt_print(periph->path, "flush cmd failed\n"); 544 return (error); 545 } 546 547 static void 548 ndainit(void) 549 { 550 cam_status status; 551 552 /* 553 * Install a global async callback. This callback will 554 * receive async callbacks like "new device found". 555 */ 556 status = xpt_register_async(AC_FOUND_DEVICE, ndaasync, NULL, NULL); 557 558 if (status != CAM_REQ_CMP) { 559 printf("nda: Failed to attach master async callback " 560 "due to status 0x%x!\n", status); 561 } else if (nda_send_ordered) { 562 /* Register our event handlers */ 563 if ((EVENTHANDLER_REGISTER(power_suspend, ndasuspend, 564 NULL, EVENTHANDLER_PRI_LAST)) == NULL) 565 printf("ndainit: power event registration failed!\n"); 566 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, ndashutdown, 567 NULL, SHUTDOWN_PRI_DEFAULT)) == NULL) 568 printf("ndainit: shutdown event registration failed!\n"); 569 } 570 } 571 572 /* 573 * Callback from GEOM, called when it has finished cleaning up its 574 * resources. 575 */ 576 static void 577 ndadiskgonecb(struct disk *dp) 578 { 579 struct cam_periph *periph; 580 581 periph = (struct cam_periph *)dp->d_drv1; 582 583 cam_periph_release(periph); 584 } 585 586 static void 587 ndaoninvalidate(struct cam_periph *periph) 588 { 589 struct nda_softc *softc; 590 591 softc = (struct nda_softc *)periph->softc; 592 593 /* 594 * De-register any async callbacks. 595 */ 596 xpt_register_async(0, ndaasync, periph, periph->path); 597 #ifdef CAM_IO_STATS 598 softc->invalidations++; 599 #endif 600 601 /* 602 * Return all queued I/O with ENXIO. Transactions may be queued up here 603 * for retry (since we are called while there's other transactions 604 * pending). Any requests in the hardware will drain before ndacleanup 605 * is called. 606 */ 607 cam_iosched_flush(softc->cam_iosched, NULL, ENXIO); 608 609 /* 610 * Tell GEOM that we've gone away, we'll get a callback when it is 611 * done cleaning up its resources. 612 */ 613 disk_gone(softc->disk); 614 } 615 616 static void 617 ndacleanup(struct cam_periph *periph) 618 { 619 struct nda_softc *softc; 620 621 softc = (struct nda_softc *)periph->softc; 622 623 cam_periph_unlock(periph); 624 625 cam_iosched_fini(softc->cam_iosched); 626 627 /* 628 * If we can't free the sysctl tree, oh well... 629 */ 630 if ((softc->flags & NDA_FLAG_SCTX_INIT) != 0) { 631 #ifdef CAM_IO_STATS 632 if (sysctl_ctx_free(&softc->sysctl_stats_ctx) != 0) 633 xpt_print(periph->path, 634 "can't remove sysctl stats context\n"); 635 #endif 636 if (sysctl_ctx_free(&softc->sysctl_ctx) != 0) 637 xpt_print(periph->path, 638 "can't remove sysctl context\n"); 639 } 640 641 disk_destroy(softc->disk); 642 free(softc, M_DEVBUF); 643 cam_periph_lock(periph); 644 } 645 646 static void 647 ndaasync(void *callback_arg, uint32_t code, 648 struct cam_path *path, void *arg) 649 { 650 struct cam_periph *periph; 651 652 periph = (struct cam_periph *)callback_arg; 653 switch (code) { 654 case AC_FOUND_DEVICE: 655 { 656 struct ccb_getdev *cgd; 657 cam_status status; 658 659 cgd = (struct ccb_getdev *)arg; 660 if (cgd == NULL) 661 break; 662 663 if (cgd->protocol != PROTO_NVME) 664 break; 665 666 /* 667 * Allocate a peripheral instance for 668 * this device and start the probe 669 * process. 670 */ 671 status = cam_periph_alloc(ndaregister, ndaoninvalidate, 672 ndacleanup, ndastart, 673 "nda", CAM_PERIPH_BIO, 674 path, ndaasync, 675 AC_FOUND_DEVICE, cgd); 676 677 if (status != CAM_REQ_CMP 678 && status != CAM_REQ_INPROG) 679 printf("ndaasync: Unable to attach to new device " 680 "due to status 0x%x\n", status); 681 break; 682 } 683 case AC_ADVINFO_CHANGED: 684 { 685 uintptr_t buftype; 686 687 buftype = (uintptr_t)arg; 688 if (buftype == CDAI_TYPE_PHYS_PATH) { 689 struct nda_softc *softc; 690 691 softc = periph->softc; 692 disk_attr_changed(softc->disk, "GEOM::physpath", 693 M_NOWAIT); 694 } 695 break; 696 } 697 case AC_LOST_DEVICE: 698 default: 699 break; 700 } 701 cam_periph_async(periph, code, path, arg); 702 } 703 704 static void 705 ndasysctlinit(void *context, int pending) 706 { 707 struct cam_periph *periph; 708 struct nda_softc *softc; 709 char tmpstr[32], tmpstr2[16]; 710 711 periph = (struct cam_periph *)context; 712 713 /* periph was held for us when this task was enqueued */ 714 if ((periph->flags & CAM_PERIPH_INVALID) != 0) { 715 cam_periph_release(periph); 716 return; 717 } 718 719 softc = (struct nda_softc *)periph->softc; 720 snprintf(tmpstr, sizeof(tmpstr), "CAM NDA unit %d", periph->unit_number); 721 snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number); 722 723 sysctl_ctx_init(&softc->sysctl_ctx); 724 softc->flags |= NDA_FLAG_SCTX_INIT; 725 softc->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&softc->sysctl_ctx, 726 SYSCTL_STATIC_CHILDREN(_kern_cam_nda), OID_AUTO, tmpstr2, 727 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr, "device_index"); 728 if (softc->sysctl_tree == NULL) { 729 printf("ndasysctlinit: unable to allocate sysctl tree\n"); 730 cam_periph_release(periph); 731 return; 732 } 733 734 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 735 OID_AUTO, "unmapped_io", CTLFLAG_RD, 736 &softc->unmappedio, 0, "Unmapped I/O leaf"); 737 738 SYSCTL_ADD_QUAD(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 739 OID_AUTO, "deletes", CTLFLAG_RD, 740 &softc->deletes, "Number of BIO_DELETE requests"); 741 742 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx, 743 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, 744 "trim_count", CTLFLAG_RD, &softc->trim_count, 745 "Total number of unmap/dsm commands sent"); 746 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx, 747 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, 748 "trim_ranges", CTLFLAG_RD, &softc->trim_ranges, 749 "Total number of ranges in unmap/dsm commands"); 750 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx, 751 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, 752 "trim_lbas", CTLFLAG_RD, &softc->trim_lbas, 753 "Total lbas in the unmap/dsm commands sent"); 754 755 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 756 OID_AUTO, "rotating", CTLFLAG_RD, &nda_rotating_media, 1, 757 "Rotating media"); 758 759 SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 760 OID_AUTO, "flags", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, 761 softc, 0, ndaflagssysctl, "A", 762 "Flags for drive"); 763 764 #ifdef CAM_IO_STATS 765 softc->sysctl_stats_tree = SYSCTL_ADD_NODE(&softc->sysctl_stats_ctx, 766 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, "stats", 767 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "Statistics"); 768 if (softc->sysctl_stats_tree == NULL) { 769 printf("ndasysctlinit: unable to allocate sysctl tree for stats\n"); 770 cam_periph_release(periph); 771 return; 772 } 773 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx, 774 SYSCTL_CHILDREN(softc->sysctl_stats_tree), 775 OID_AUTO, "timeouts", CTLFLAG_RD, 776 &softc->timeouts, 0, 777 "Device timeouts reported by the SIM"); 778 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx, 779 SYSCTL_CHILDREN(softc->sysctl_stats_tree), 780 OID_AUTO, "errors", CTLFLAG_RD, 781 &softc->errors, 0, 782 "Transport errors reported by the SIM."); 783 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx, 784 SYSCTL_CHILDREN(softc->sysctl_stats_tree), 785 OID_AUTO, "pack_invalidations", CTLFLAG_RD, 786 &softc->invalidations, 0, 787 "Device pack invalidations."); 788 #endif 789 790 #ifdef CAM_TEST_FAILURE 791 SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 792 OID_AUTO, "invalidate", CTLTYPE_U64 | CTLFLAG_RW | CTLFLAG_MPSAFE, 793 periph, 0, cam_periph_invalidate_sysctl, "I", 794 "Write 1 to invalidate the drive immediately"); 795 #endif 796 797 cam_iosched_sysctl_init(softc->cam_iosched, &softc->sysctl_ctx, 798 softc->sysctl_tree); 799 800 cam_periph_release(periph); 801 } 802 803 static int 804 ndaflagssysctl(SYSCTL_HANDLER_ARGS) 805 { 806 struct sbuf sbuf; 807 struct nda_softc *softc = arg1; 808 int error; 809 810 sbuf_new_for_sysctl(&sbuf, NULL, 0, req); 811 if (softc->flags != 0) 812 sbuf_printf(&sbuf, "0x%b", (unsigned)softc->flags, NDA_FLAG_STRING); 813 else 814 sbuf_putc(&sbuf, '0'); 815 error = sbuf_finish(&sbuf); 816 sbuf_delete(&sbuf); 817 818 return (error); 819 } 820 821 static int 822 ndagetattr(struct bio *bp) 823 { 824 int ret; 825 struct cam_periph *periph; 826 827 if (g_handleattr_int(bp, "GEOM::canspeedup", nda_enable_biospeedup)) 828 return (EJUSTRETURN); 829 830 periph = (struct cam_periph *)bp->bio_disk->d_drv1; 831 cam_periph_lock(periph); 832 ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute, 833 periph->path); 834 cam_periph_unlock(periph); 835 if (ret == 0) 836 bp->bio_completed = bp->bio_length; 837 return ret; 838 } 839 840 static cam_status 841 ndaregister(struct cam_periph *periph, void *arg) 842 { 843 struct nda_softc *softc; 844 struct disk *disk; 845 struct ccb_pathinq cpi; 846 const struct nvme_namespace_data *nsd; 847 const struct nvme_controller_data *cd; 848 char announce_buf[80]; 849 uint8_t flbas_fmt, lbads, vwc_present; 850 u_int maxio; 851 int quirks; 852 853 nsd = nvme_get_identify_ns(periph); 854 cd = nvme_get_identify_cntrl(periph); 855 856 softc = (struct nda_softc *)malloc(sizeof(*softc), M_DEVBUF, 857 M_NOWAIT | M_ZERO); 858 859 if (softc == NULL) { 860 printf("ndaregister: Unable to probe new device. " 861 "Unable to allocate softc\n"); 862 return(CAM_REQ_CMP_ERR); 863 } 864 865 /* ident_data parsing */ 866 867 periph->softc = softc; 868 softc->quirks = NDA_Q_NONE; 869 xpt_path_inq(&cpi, periph->path); 870 TASK_INIT(&softc->sysctl_task, 0, ndasysctlinit, periph); 871 872 /* 873 * The name space ID is the lun, save it for later I/O 874 */ 875 softc->nsid = (uint32_t)xpt_path_lun_id(periph->path); 876 877 /* 878 * Register this media as a disk 879 */ 880 (void)cam_periph_acquire(periph); 881 cam_periph_unlock(periph); 882 snprintf(announce_buf, sizeof(announce_buf), 883 "kern.cam.nda.%d.quirks", periph->unit_number); 884 quirks = softc->quirks; 885 TUNABLE_INT_FETCH(announce_buf, &quirks); 886 softc->quirks = quirks; 887 softc->disk = disk = disk_alloc(); 888 disk->d_rotation_rate = DISK_RR_NON_ROTATING; 889 disk->d_open = ndaopen; 890 disk->d_close = ndaclose; 891 disk->d_strategy = ndastrategy; 892 disk->d_ioctl = ndaioctl; 893 disk->d_getattr = ndagetattr; 894 if (cam_sim_pollable(periph->sim)) 895 disk->d_dump = ndadump; 896 disk->d_gone = ndadiskgonecb; 897 disk->d_name = "nda"; 898 disk->d_drv1 = periph; 899 disk->d_unit = periph->unit_number; 900 maxio = cpi.maxio; /* Honor max I/O size of SIM */ 901 if (maxio == 0) 902 maxio = DFLTPHYS; /* traditional default */ 903 else if (maxio > maxphys) 904 maxio = maxphys; /* for safety */ 905 disk->d_maxsize = maxio; 906 flbas_fmt = NVMEV(NVME_NS_DATA_FLBAS_FORMAT, nsd->flbas); 907 lbads = NVMEV(NVME_NS_DATA_LBAF_LBADS, nsd->lbaf[flbas_fmt]); 908 disk->d_sectorsize = 1 << lbads; 909 disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze); 910 disk->d_delmaxsize = disk->d_mediasize; 911 disk->d_flags = DISKFLAG_DIRECT_COMPLETION; 912 if (nvme_ctrlr_has_dataset_mgmt(cd)) 913 disk->d_flags |= DISKFLAG_CANDELETE; 914 vwc_present = NVMEV(NVME_CTRLR_DATA_VWC_PRESENT, cd->vwc); 915 if (vwc_present) 916 disk->d_flags |= DISKFLAG_CANFLUSHCACHE; 917 if ((cpi.hba_misc & PIM_UNMAPPED) != 0) { 918 disk->d_flags |= DISKFLAG_UNMAPPED_BIO; 919 softc->unmappedio = 1; 920 } 921 /* 922 * d_ident and d_descr are both far bigger than the length of either 923 * the serial or model number strings. 924 */ 925 cam_strvis_flag(disk->d_descr, cd->mn, NVME_MODEL_NUMBER_LENGTH, 926 sizeof(disk->d_descr), CAM_STRVIS_FLAG_NONASCII_SPC); 927 928 cam_strvis_flag(disk->d_ident, cd->sn, NVME_SERIAL_NUMBER_LENGTH, 929 sizeof(disk->d_ident), CAM_STRVIS_FLAG_NONASCII_SPC); 930 931 disk->d_hba_vendor = cpi.hba_vendor; 932 disk->d_hba_device = cpi.hba_device; 933 disk->d_hba_subvendor = cpi.hba_subvendor; 934 disk->d_hba_subdevice = cpi.hba_subdevice; 935 snprintf(disk->d_attachment, sizeof(disk->d_attachment), 936 "%s%d", cpi.dev_name, cpi.unit_number); 937 if (NVMEV(NVME_NS_DATA_NSFEAT_NPVALID, nsd->nsfeat) != 0 && 938 nsd->npwg != 0) 939 disk->d_stripesize = ((nsd->npwg + 1) * disk->d_sectorsize); 940 else 941 disk->d_stripesize = nsd->noiob * disk->d_sectorsize; 942 disk->d_stripeoffset = 0; 943 disk->d_devstat = devstat_new_entry(periph->periph_name, 944 periph->unit_number, disk->d_sectorsize, 945 DEVSTAT_ALL_SUPPORTED, 946 DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport), 947 DEVSTAT_PRIORITY_DISK); 948 949 if (cam_iosched_init(&softc->cam_iosched, periph, disk, 950 ndaschedule) != 0) { 951 printf("ndaregister: Unable to probe new device. " 952 "Unable to allocate iosched memory\n"); 953 free(softc, M_DEVBUF); 954 return(CAM_REQ_CMP_ERR); 955 } 956 cam_iosched_set_sort_queue(softc->cam_iosched, 0); 957 958 /* 959 * Add alias for older nvd drives to ease transition. 960 */ 961 if (nda_nvd_compat) 962 disk_add_alias(disk, "nvd"); 963 964 cam_periph_lock(periph); 965 966 snprintf(announce_buf, sizeof(announce_buf), 967 "%juMB (%ju %u byte sectors)", 968 (uintmax_t)((uintmax_t)disk->d_mediasize / (1024*1024)), 969 (uintmax_t)disk->d_mediasize / disk->d_sectorsize, 970 disk->d_sectorsize); 971 xpt_announce_periph(periph, announce_buf); 972 xpt_announce_quirks(periph, softc->quirks, NDA_Q_BIT_STRING); 973 974 /* 975 * Create our sysctl variables, now that we know 976 * we have successfully attached. 977 */ 978 if (cam_periph_acquire(periph) == 0) 979 taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task); 980 981 /* 982 * Register for device going away and info about the drive 983 * changing (though with NVMe, it can't) 984 */ 985 xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED, 986 ndaasync, periph, periph->path); 987 988 softc->state = NDA_STATE_NORMAL; 989 990 /* 991 * We'll release this reference once GEOM calls us back via 992 * ndadiskgonecb(), telling us that our provider has been freed. 993 */ 994 if (cam_periph_acquire(periph) == 0) 995 disk_create(softc->disk, DISK_VERSION); 996 997 cam_periph_release_locked(periph); 998 return(CAM_REQ_CMP); 999 } 1000 1001 static void 1002 ndastart(struct cam_periph *periph, union ccb *start_ccb) 1003 { 1004 struct nda_softc *softc = (struct nda_softc *)periph->softc; 1005 struct ccb_nvmeio *nvmeio = &start_ccb->nvmeio; 1006 1007 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart\n")); 1008 1009 switch (softc->state) { 1010 case NDA_STATE_NORMAL: 1011 { 1012 struct bio *bp; 1013 1014 bp = cam_iosched_next_bio(softc->cam_iosched); 1015 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart: bio %p\n", bp)); 1016 if (bp == NULL) { 1017 xpt_release_ccb(start_ccb); 1018 break; 1019 } 1020 1021 switch (bp->bio_cmd) { 1022 case BIO_WRITE: 1023 softc->flags |= NDA_FLAG_DIRTY; 1024 /* FALLTHROUGH */ 1025 case BIO_READ: 1026 { 1027 #ifdef CAM_TEST_FAILURE 1028 int fail = 0; 1029 1030 /* 1031 * Support the failure ioctls. If the command is a 1032 * read, and there are pending forced read errors, or 1033 * if a write and pending write errors, then fail this 1034 * operation with EIO. This is useful for testing 1035 * purposes. Also, support having every Nth read fail. 1036 * 1037 * This is a rather blunt tool. 1038 */ 1039 if (bp->bio_cmd == BIO_READ) { 1040 if (softc->force_read_error) { 1041 softc->force_read_error--; 1042 fail = 1; 1043 } 1044 if (softc->periodic_read_error > 0) { 1045 if (++softc->periodic_read_count >= 1046 softc->periodic_read_error) { 1047 softc->periodic_read_count = 0; 1048 fail = 1; 1049 } 1050 } 1051 } else { 1052 if (softc->force_write_error) { 1053 softc->force_write_error--; 1054 fail = 1; 1055 } 1056 } 1057 if (fail) { 1058 biofinish(bp, NULL, EIO); 1059 xpt_release_ccb(start_ccb); 1060 ndaschedule(periph); 1061 return; 1062 } 1063 #endif 1064 KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 || 1065 round_page(bp->bio_bcount + bp->bio_ma_offset) / 1066 PAGE_SIZE == bp->bio_ma_n, 1067 ("Short bio %p", bp)); 1068 nda_nvme_rw_bio(softc, &start_ccb->nvmeio, bp, bp->bio_cmd == BIO_READ ? 1069 NVME_OPC_READ : NVME_OPC_WRITE); 1070 break; 1071 } 1072 case BIO_DELETE: 1073 { 1074 struct nvme_dsm_range *dsm_range, *dsm_end; 1075 struct nda_trim_request *trim; 1076 struct bio *bp1; 1077 int ents; 1078 uint32_t totalcount = 0, ranges = 0; 1079 1080 trim = malloc(sizeof(*trim), M_NVMEDA, M_ZERO | M_NOWAIT); 1081 if (trim == NULL) { 1082 /* 1083 * We have to drop the periph lock when 1084 * returning ENOMEM. g_io_deliver treats these 1085 * request differently and will recursively call 1086 * the start routine which causes us to get into 1087 * ndastrategy with the periph lock held, 1088 * leading to a panic when its acquired again. 1089 */ 1090 cam_periph_unlock(periph); 1091 biofinish(bp, NULL, ENOMEM); 1092 cam_periph_lock(periph); 1093 xpt_release_ccb(start_ccb); 1094 ndaschedule(periph); 1095 return; 1096 } 1097 TAILQ_INIT(&trim->bps); 1098 bp1 = bp; 1099 ents = min(nitems(trim->dsm), nda_max_trim_entries); 1100 ents = max(ents, 1); 1101 dsm_range = trim->dsm; 1102 dsm_end = dsm_range + ents; 1103 do { 1104 TAILQ_INSERT_TAIL(&trim->bps, bp1, bio_queue); 1105 dsm_range->length = 1106 htole32(bp1->bio_bcount / softc->disk->d_sectorsize); 1107 dsm_range->starting_lba = 1108 htole64(bp1->bio_offset / softc->disk->d_sectorsize); 1109 ranges++; 1110 totalcount += dsm_range->length; 1111 dsm_range++; 1112 if (dsm_range >= dsm_end) 1113 break; 1114 bp1 = cam_iosched_next_trim(softc->cam_iosched); 1115 /* XXX -- Could collapse adjacent ranges, but we don't for now */ 1116 /* XXX -- Could limit based on total payload size */ 1117 } while (bp1 != NULL); 1118 start_ccb->ccb_trim = trim; 1119 nda_nvme_trim(softc, &start_ccb->nvmeio, trim->dsm, 1120 dsm_range - trim->dsm); 1121 start_ccb->ccb_state = NDA_CCB_TRIM; 1122 softc->trim_count++; 1123 softc->trim_ranges += ranges; 1124 softc->trim_lbas += totalcount; 1125 /* 1126 * Note: We can have multiple TRIMs in flight, so we don't call 1127 * cam_iosched_submit_trim(softc->cam_iosched); 1128 * since that forces the I/O scheduler to only schedule one at a time. 1129 * On NVMe drives, this is a performance disaster. 1130 */ 1131 goto out; 1132 } 1133 case BIO_FLUSH: 1134 nda_nvme_flush(softc, nvmeio); 1135 break; 1136 default: 1137 biofinish(bp, NULL, EOPNOTSUPP); 1138 xpt_release_ccb(start_ccb); 1139 ndaschedule(periph); 1140 return; 1141 } 1142 start_ccb->ccb_state = NDA_CCB_BUFFER_IO; 1143 start_ccb->ccb_bp = bp; 1144 out: 1145 start_ccb->ccb_h.flags |= CAM_UNLOCKED; 1146 softc->outstanding_cmds++; 1147 softc->refcount++; /* For submission only */ 1148 cam_periph_unlock(periph); 1149 xpt_action(start_ccb); 1150 cam_periph_lock(periph); 1151 softc->refcount--; /* Submission done */ 1152 1153 /* May have more work to do, so ensure we stay scheduled */ 1154 ndaschedule(periph); 1155 break; 1156 } 1157 } 1158 } 1159 1160 static void 1161 ndadone(struct cam_periph *periph, union ccb *done_ccb) 1162 { 1163 struct nda_softc *softc; 1164 struct ccb_nvmeio *nvmeio = &done_ccb->nvmeio; 1165 struct cam_path *path; 1166 int state; 1167 1168 softc = (struct nda_softc *)periph->softc; 1169 path = done_ccb->ccb_h.path; 1170 1171 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("ndadone\n")); 1172 1173 state = nvmeio->ccb_state & NDA_CCB_TYPE_MASK; 1174 switch (state) { 1175 case NDA_CCB_BUFFER_IO: 1176 case NDA_CCB_TRIM: 1177 { 1178 int error; 1179 1180 cam_periph_lock(periph); 1181 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1182 error = ndaerror(done_ccb, 0, 0); 1183 if (error == ERESTART) { 1184 /* A retry was scheduled, so just return. */ 1185 cam_periph_unlock(periph); 1186 return; 1187 } 1188 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 1189 cam_release_devq(path, 1190 /*relsim_flags*/0, 1191 /*reduction*/0, 1192 /*timeout*/0, 1193 /*getcount_only*/0); 1194 } else { 1195 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 1196 panic("REQ_CMP with QFRZN"); 1197 error = 0; 1198 } 1199 if (state == NDA_CCB_BUFFER_IO) { 1200 struct bio *bp; 1201 1202 bp = (struct bio *)done_ccb->ccb_bp; 1203 bp->bio_error = error; 1204 if (error != 0) { 1205 bp->bio_resid = bp->bio_bcount; 1206 bp->bio_flags |= BIO_ERROR; 1207 } else { 1208 bp->bio_resid = 0; 1209 } 1210 softc->outstanding_cmds--; 1211 1212 /* 1213 * We need to call cam_iosched before we call biodone so that we 1214 * don't measure any activity that happens in the completion 1215 * routine, which in the case of sendfile can be quite 1216 * extensive. 1217 */ 1218 cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb); 1219 xpt_release_ccb(done_ccb); 1220 ndaschedule(periph); 1221 cam_periph_unlock(periph); 1222 biodone(bp); 1223 } else { /* state == NDA_CCB_TRIM */ 1224 struct nda_trim_request *trim; 1225 struct bio *bp1, *bp2; 1226 TAILQ_HEAD(, bio) queue; 1227 1228 trim = nvmeio->ccb_trim; 1229 TAILQ_INIT(&queue); 1230 TAILQ_CONCAT(&queue, &trim->bps, bio_queue); 1231 free(trim, M_NVMEDA); 1232 1233 /* 1234 * Since we can have multiple trims in flight, we don't 1235 * need to call this here. 1236 * cam_iosched_trim_done(softc->cam_iosched); 1237 */ 1238 /* 1239 * The the I/O scheduler that we're finishing the I/O 1240 * so we can keep book. The first one we pass in the CCB 1241 * which has the timing information. The rest we pass in NULL 1242 * so we can keep proper counts. 1243 */ 1244 bp1 = TAILQ_FIRST(&queue); 1245 cam_iosched_bio_complete(softc->cam_iosched, bp1, done_ccb); 1246 xpt_release_ccb(done_ccb); 1247 softc->outstanding_cmds--; 1248 ndaschedule(periph); 1249 cam_periph_unlock(periph); 1250 while ((bp2 = TAILQ_FIRST(&queue)) != NULL) { 1251 TAILQ_REMOVE(&queue, bp2, bio_queue); 1252 bp2->bio_error = error; 1253 if (error != 0) { 1254 bp2->bio_flags |= BIO_ERROR; 1255 bp2->bio_resid = bp1->bio_bcount; 1256 } else 1257 bp2->bio_resid = 0; 1258 if (bp1 != bp2) 1259 cam_iosched_bio_complete(softc->cam_iosched, bp2, NULL); 1260 biodone(bp2); 1261 } 1262 } 1263 return; 1264 } 1265 case NDA_CCB_DUMP: 1266 /* No-op. We're polling */ 1267 return; 1268 case NDA_CCB_PASS: 1269 /* NVME_PASSTHROUGH_CMD runs this CCB and releases it */ 1270 return; 1271 default: 1272 break; 1273 } 1274 xpt_release_ccb(done_ccb); 1275 } 1276 1277 static int 1278 ndaerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags) 1279 { 1280 #ifdef CAM_IO_STATS 1281 struct nda_softc *softc; 1282 struct cam_periph *periph; 1283 1284 periph = xpt_path_periph(ccb->ccb_h.path); 1285 softc = (struct nda_softc *)periph->softc; 1286 #endif 1287 1288 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1289 case CAM_CMD_TIMEOUT: 1290 #ifdef CAM_IO_STATS 1291 softc->timeouts++; 1292 #endif 1293 break; 1294 case CAM_REQ_CMP_ERR: 1295 case CAM_NVME_STATUS_ERROR: 1296 #ifdef CAM_IO_STATS 1297 softc->errors++; 1298 #endif 1299 break; 1300 default: 1301 break; 1302 } 1303 1304 return(cam_periph_error(ccb, cam_flags, sense_flags)); 1305 } 1306 1307 /* 1308 * Step through all NDA peripheral drivers, and if the device is still open, 1309 * sync the disk cache to physical media. 1310 */ 1311 static void 1312 ndaflush(void) 1313 { 1314 struct cam_periph *periph; 1315 struct nda_softc *softc; 1316 union ccb *ccb; 1317 int error; 1318 1319 CAM_PERIPH_FOREACH(periph, &ndadriver) { 1320 softc = (struct nda_softc *)periph->softc; 1321 1322 if (SCHEDULER_STOPPED()) { 1323 /* 1324 * If we panicked with the lock held or the periph is not 1325 * open, do not recurse. Otherwise, call ndadump since 1326 * that avoids the sleeping cam_periph_getccb does if no 1327 * CCBs are available. 1328 */ 1329 if (!cam_periph_owned(periph) && 1330 (softc->flags & NDA_FLAG_OPEN)) { 1331 ndadump(softc->disk, NULL, 0, 0); 1332 } 1333 continue; 1334 } 1335 1336 /* 1337 * We only sync the cache if the drive is still open 1338 */ 1339 cam_periph_lock(periph); 1340 if ((softc->flags & NDA_FLAG_OPEN) == 0) { 1341 cam_periph_unlock(periph); 1342 continue; 1343 } 1344 1345 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 1346 nda_nvme_flush(softc, &ccb->nvmeio); 1347 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0, 1348 /*sense_flags*/ SF_NO_RECOVERY | SF_NO_RETRY, 1349 softc->disk->d_devstat); 1350 if (error != 0) 1351 xpt_print(periph->path, "Synchronize cache failed\n"); 1352 xpt_release_ccb(ccb); 1353 cam_periph_unlock(periph); 1354 } 1355 } 1356 1357 static void 1358 ndashutdown(void *arg, int howto) 1359 { 1360 1361 if ((howto & RB_NOSYNC) != 0) 1362 return; 1363 1364 ndaflush(); 1365 } 1366 1367 static void 1368 ndasuspend(void *arg) 1369 { 1370 1371 ndaflush(); 1372 } 1373