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sys/cam/nvme/nvme_da.c
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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/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 static int nda_nvd_compat = 1; 189 SYSCTL_INT(_kern_cam_nda, OID_AUTO, max_trim, CTLFLAG_RDTUN, 190 &nda_max_trim_entries, NDA_MAX_TRIM_ENTRIES, 191 "Maximum number of BIO_DELETE to send down as a DSM TRIM."); 192 SYSCTL_INT(_kern_cam_nda, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN, 193 &nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing."); 194 SYSCTL_INT(_kern_cam_nda, OID_AUTO, nvd_compat, CTLFLAG_RDTUN, 195 &nda_nvd_compat, 1, "Enable creation of nvd aliases."); 196 197 /* 198 * All NVMe media is non-rotational, so all nvme device instances 199 * share this to implement the sysctl. 200 */ 201 static int nda_rotating_media = 0; 202 203 static struct periph_driver ndadriver = 204 { 205 ndainit, "nda", 206 TAILQ_HEAD_INITIALIZER(ndadriver.units), /* generation */ 0 207 }; 208 209 PERIPHDRIVER_DECLARE(nda, ndadriver); 210 211 static MALLOC_DEFINE(M_NVMEDA, "nvme_da", "nvme_da buffers"); 212 213 /* 214 * nice wrappers. Maybe these belong in nvme_all.c instead of 215 * here, but this is the only place that uses these. Should 216 * we ever grow another NVME periph, we should move them 217 * all there wholesale. 218 */ 219 220 static void 221 nda_nvme_flush(struct nda_softc *softc, struct ccb_nvmeio *nvmeio) 222 { 223 cam_fill_nvmeio(nvmeio, 224 0, /* retries */ 225 ndadone, /* cbfcnp */ 226 CAM_DIR_NONE, /* flags */ 227 NULL, /* data_ptr */ 228 0, /* dxfer_len */ 229 nda_default_timeout * 1000); /* timeout 30s */ 230 nvme_ns_flush_cmd(&nvmeio->cmd, softc->nsid); 231 } 232 233 static void 234 nda_nvme_trim(struct nda_softc *softc, struct ccb_nvmeio *nvmeio, 235 void *payload, uint32_t num_ranges) 236 { 237 cam_fill_nvmeio(nvmeio, 238 0, /* retries */ 239 ndadone, /* cbfcnp */ 240 CAM_DIR_OUT, /* flags */ 241 payload, /* data_ptr */ 242 num_ranges * sizeof(struct nvme_dsm_range), /* dxfer_len */ 243 nda_default_timeout * 1000); /* timeout 30s */ 244 nvme_ns_trim_cmd(&nvmeio->cmd, softc->nsid, num_ranges); 245 } 246 247 static void 248 nda_nvme_write(struct nda_softc *softc, struct ccb_nvmeio *nvmeio, 249 void *payload, uint64_t lba, uint32_t len, uint32_t count) 250 { 251 cam_fill_nvmeio(nvmeio, 252 0, /* retries */ 253 ndadone, /* cbfcnp */ 254 CAM_DIR_OUT, /* flags */ 255 payload, /* data_ptr */ 256 len, /* dxfer_len */ 257 nda_default_timeout * 1000); /* timeout 30s */ 258 nvme_ns_write_cmd(&nvmeio->cmd, softc->nsid, lba, count); 259 } 260 261 static void 262 nda_nvme_rw_bio(struct nda_softc *softc, struct ccb_nvmeio *nvmeio, 263 struct bio *bp, uint32_t rwcmd) 264 { 265 int flags = rwcmd == NVME_OPC_READ ? CAM_DIR_IN : CAM_DIR_OUT; 266 void *payload; 267 uint64_t lba; 268 uint32_t count; 269 270 if (bp->bio_flags & BIO_UNMAPPED) { 271 flags |= CAM_DATA_BIO; 272 payload = bp; 273 } else { 274 payload = bp->bio_data; 275 } 276 277 lba = bp->bio_pblkno; 278 count = bp->bio_bcount / softc->disk->d_sectorsize; 279 280 cam_fill_nvmeio(nvmeio, 281 0, /* retries */ 282 ndadone, /* cbfcnp */ 283 flags, /* flags */ 284 payload, /* data_ptr */ 285 bp->bio_bcount, /* dxfer_len */ 286 nda_default_timeout * 1000); /* timeout 30s */ 287 nvme_ns_rw_cmd(&nvmeio->cmd, rwcmd, softc->nsid, lba, count); 288 } 289 290 static int 291 ndaopen(struct disk *dp) 292 { 293 struct cam_periph *periph; 294 struct nda_softc *softc; 295 int error; 296 297 periph = (struct cam_periph *)dp->d_drv1; 298 if (cam_periph_acquire(periph) != 0) { 299 return(ENXIO); 300 } 301 302 cam_periph_lock(periph); 303 if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) { 304 cam_periph_unlock(periph); 305 cam_periph_release(periph); 306 return (error); 307 } 308 309 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH, 310 ("ndaopen\n")); 311 312 softc = (struct nda_softc *)periph->softc; 313 softc->flags |= NDA_FLAG_OPEN; 314 315 cam_periph_unhold(periph); 316 cam_periph_unlock(periph); 317 return (0); 318 } 319 320 static int 321 ndaclose(struct disk *dp) 322 { 323 struct cam_periph *periph; 324 struct nda_softc *softc; 325 union ccb *ccb; 326 int error; 327 328 periph = (struct cam_periph *)dp->d_drv1; 329 softc = (struct nda_softc *)periph->softc; 330 cam_periph_lock(periph); 331 332 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE | CAM_DEBUG_PERIPH, 333 ("ndaclose\n")); 334 335 if ((softc->flags & NDA_FLAG_DIRTY) != 0 && 336 (periph->flags & CAM_PERIPH_INVALID) == 0 && 337 cam_periph_hold(periph, PRIBIO) == 0) { 338 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 339 nda_nvme_flush(softc, &ccb->nvmeio); 340 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0, 341 /*sense_flags*/0, softc->disk->d_devstat); 342 343 if (error != 0) 344 xpt_print(periph->path, "Synchronize cache failed\n"); 345 else 346 softc->flags &= ~NDA_FLAG_DIRTY; 347 xpt_release_ccb(ccb); 348 cam_periph_unhold(periph); 349 } 350 351 softc->flags &= ~NDA_FLAG_OPEN; 352 353 while (softc->refcount != 0) 354 cam_periph_sleep(periph, &softc->refcount, PRIBIO, "ndaclose", 1); 355 KASSERT(softc->outstanding_cmds == 0, 356 ("nda %d outstanding commands", softc->outstanding_cmds)); 357 cam_periph_unlock(periph); 358 cam_periph_release(periph); 359 return (0); 360 } 361 362 static void 363 ndaschedule(struct cam_periph *periph) 364 { 365 struct nda_softc *softc = (struct nda_softc *)periph->softc; 366 367 if (softc->state != NDA_STATE_NORMAL) 368 return; 369 370 cam_iosched_schedule(softc->cam_iosched, periph); 371 } 372 373 static int 374 ndaioctl(struct disk *dp, u_long cmd, void *data, int fflag, 375 struct thread *td) 376 { 377 struct cam_periph *periph; 378 379 periph = (struct cam_periph *)dp->d_drv1; 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, 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 /* Register our event handlers */ 565 if ((EVENTHANDLER_REGISTER(power_suspend, ndasuspend, 566 NULL, EVENTHANDLER_PRI_LAST)) == NULL) 567 printf("ndainit: power event registration failed!\n"); 568 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, ndashutdown, 569 NULL, SHUTDOWN_PRI_DEFAULT)) == NULL) 570 printf("ndainit: shutdown event registration failed!\n"); 571 } 572 } 573 574 /* 575 * Callback from GEOM, called when it has finished cleaning up its 576 * resources. 577 */ 578 static void 579 ndadiskgonecb(struct disk *dp) 580 { 581 struct cam_periph *periph; 582 583 periph = (struct cam_periph *)dp->d_drv1; 584 585 cam_periph_release(periph); 586 } 587 588 static void 589 ndaoninvalidate(struct cam_periph *periph) 590 { 591 struct nda_softc *softc; 592 593 softc = (struct nda_softc *)periph->softc; 594 595 /* 596 * De-register any async callbacks. 597 */ 598 xpt_register_async(0, ndaasync, periph, periph->path); 599 #ifdef CAM_IO_STATS 600 softc->invalidations++; 601 #endif 602 603 /* 604 * Return all queued I/O with ENXIO. Transactions may be queued up here 605 * for retry (since we are called while there's other transactions 606 * pending). Any requests in the hardware will drain before ndacleanup 607 * is called. 608 */ 609 cam_iosched_flush(softc->cam_iosched, NULL, ENXIO); 610 611 /* 612 * Tell GEOM that we've gone away, we'll get a callback when it is 613 * done cleaning up its resources. 614 */ 615 disk_gone(softc->disk); 616 } 617 618 static void 619 ndacleanup(struct cam_periph *periph) 620 { 621 struct nda_softc *softc; 622 623 softc = (struct nda_softc *)periph->softc; 624 625 cam_periph_unlock(periph); 626 627 cam_iosched_fini(softc->cam_iosched); 628 629 /* 630 * If we can't free the sysctl tree, oh well... 631 */ 632 if ((softc->flags & NDA_FLAG_SCTX_INIT) != 0) { 633 #ifdef CAM_IO_STATS 634 if (sysctl_ctx_free(&softc->sysctl_stats_ctx) != 0) 635 xpt_print(periph->path, 636 "can't remove sysctl stats context\n"); 637 #endif 638 if (sysctl_ctx_free(&softc->sysctl_ctx) != 0) 639 xpt_print(periph->path, 640 "can't remove sysctl context\n"); 641 } 642 643 disk_destroy(softc->disk); 644 free(softc, M_DEVBUF); 645 cam_periph_lock(periph); 646 } 647 648 static void 649 ndaasync(void *callback_arg, u_int32_t code, 650 struct cam_path *path, void *arg) 651 { 652 struct cam_periph *periph; 653 654 periph = (struct cam_periph *)callback_arg; 655 switch (code) { 656 case AC_FOUND_DEVICE: 657 { 658 struct ccb_getdev *cgd; 659 cam_status status; 660 661 cgd = (struct ccb_getdev *)arg; 662 if (cgd == NULL) 663 break; 664 665 if (cgd->protocol != PROTO_NVME) 666 break; 667 668 /* 669 * Allocate a peripheral instance for 670 * this device and start the probe 671 * process. 672 */ 673 status = cam_periph_alloc(ndaregister, ndaoninvalidate, 674 ndacleanup, ndastart, 675 "nda", CAM_PERIPH_BIO, 676 path, ndaasync, 677 AC_FOUND_DEVICE, cgd); 678 679 if (status != CAM_REQ_CMP 680 && status != CAM_REQ_INPROG) 681 printf("ndaasync: Unable to attach to new device " 682 "due to status 0x%x\n", status); 683 break; 684 } 685 case AC_ADVINFO_CHANGED: 686 { 687 uintptr_t buftype; 688 689 buftype = (uintptr_t)arg; 690 if (buftype == CDAI_TYPE_PHYS_PATH) { 691 struct nda_softc *softc; 692 693 softc = periph->softc; 694 disk_attr_changed(softc->disk, "GEOM::physpath", 695 M_NOWAIT); 696 } 697 break; 698 } 699 case AC_LOST_DEVICE: 700 default: 701 break; 702 } 703 cam_periph_async(periph, code, path, arg); 704 } 705 706 static void 707 ndasysctlinit(void *context, int pending) 708 { 709 struct cam_periph *periph; 710 struct nda_softc *softc; 711 char tmpstr[32], tmpstr2[16]; 712 713 periph = (struct cam_periph *)context; 714 715 /* periph was held for us when this task was enqueued */ 716 if ((periph->flags & CAM_PERIPH_INVALID) != 0) { 717 cam_periph_release(periph); 718 return; 719 } 720 721 softc = (struct nda_softc *)periph->softc; 722 snprintf(tmpstr, sizeof(tmpstr), "CAM NDA unit %d", periph->unit_number); 723 snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number); 724 725 sysctl_ctx_init(&softc->sysctl_ctx); 726 softc->flags |= NDA_FLAG_SCTX_INIT; 727 softc->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&softc->sysctl_ctx, 728 SYSCTL_STATIC_CHILDREN(_kern_cam_nda), OID_AUTO, tmpstr2, 729 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, tmpstr, "device_index"); 730 if (softc->sysctl_tree == NULL) { 731 printf("ndasysctlinit: unable to allocate sysctl tree\n"); 732 cam_periph_release(periph); 733 return; 734 } 735 736 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 737 OID_AUTO, "unmapped_io", CTLFLAG_RD, 738 &softc->unmappedio, 0, "Unmapped I/O leaf"); 739 740 SYSCTL_ADD_QUAD(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 741 OID_AUTO, "deletes", CTLFLAG_RD, 742 &softc->deletes, "Number of BIO_DELETE requests"); 743 744 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx, 745 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, 746 "trim_count", CTLFLAG_RD, &softc->trim_count, 747 "Total number of unmap/dsm commands sent"); 748 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx, 749 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, 750 "trim_ranges", CTLFLAG_RD, &softc->trim_ranges, 751 "Total number of ranges in unmap/dsm commands"); 752 SYSCTL_ADD_UQUAD(&softc->sysctl_ctx, 753 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, 754 "trim_lbas", CTLFLAG_RD, &softc->trim_lbas, 755 "Total lbas in the unmap/dsm commands sent"); 756 757 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 758 OID_AUTO, "rotating", CTLFLAG_RD, &nda_rotating_media, 1, 759 "Rotating media"); 760 761 SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 762 OID_AUTO, "flags", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, 763 softc, 0, ndaflagssysctl, "A", 764 "Flags for drive"); 765 766 #ifdef CAM_IO_STATS 767 softc->sysctl_stats_tree = SYSCTL_ADD_NODE(&softc->sysctl_stats_ctx, 768 SYSCTL_CHILDREN(softc->sysctl_tree), OID_AUTO, "stats", 769 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "Statistics"); 770 if (softc->sysctl_stats_tree == NULL) { 771 printf("ndasysctlinit: unable to allocate sysctl tree for stats\n"); 772 cam_periph_release(periph); 773 return; 774 } 775 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx, 776 SYSCTL_CHILDREN(softc->sysctl_stats_tree), 777 OID_AUTO, "timeouts", CTLFLAG_RD, 778 &softc->timeouts, 0, 779 "Device timeouts reported by the SIM"); 780 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx, 781 SYSCTL_CHILDREN(softc->sysctl_stats_tree), 782 OID_AUTO, "errors", CTLFLAG_RD, 783 &softc->errors, 0, 784 "Transport errors reported by the SIM."); 785 SYSCTL_ADD_INT(&softc->sysctl_stats_ctx, 786 SYSCTL_CHILDREN(softc->sysctl_stats_tree), 787 OID_AUTO, "pack_invalidations", CTLFLAG_RD, 788 &softc->invalidations, 0, 789 "Device pack invalidations."); 790 #endif 791 792 #ifdef CAM_TEST_FAILURE 793 SYSCTL_ADD_PROC(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 794 OID_AUTO, "invalidate", CTLTYPE_U64 | CTLFLAG_RW | CTLFLAG_MPSAFE, 795 periph, 0, cam_periph_invalidate_sysctl, "I", 796 "Write 1 to invalidate the drive immediately"); 797 #endif 798 799 cam_iosched_sysctl_init(softc->cam_iosched, &softc->sysctl_ctx, 800 softc->sysctl_tree); 801 802 cam_periph_release(periph); 803 } 804 805 static int 806 ndaflagssysctl(SYSCTL_HANDLER_ARGS) 807 { 808 struct sbuf sbuf; 809 struct nda_softc *softc = arg1; 810 int error; 811 812 sbuf_new_for_sysctl(&sbuf, NULL, 0, req); 813 if (softc->flags != 0) 814 sbuf_printf(&sbuf, "0x%b", (unsigned)softc->flags, NDA_FLAG_STRING); 815 else 816 sbuf_printf(&sbuf, ""); 817 error = sbuf_finish(&sbuf); 818 sbuf_delete(&sbuf); 819 820 return (error); 821 } 822 823 static int 824 ndagetattr(struct bio *bp) 825 { 826 int ret; 827 struct cam_periph *periph; 828 829 if (g_handleattr_int(bp, "GEOM::canspeedup", nda_enable_biospeedup)) 830 return (EJUSTRETURN); 831 832 periph = (struct cam_periph *)bp->bio_disk->d_drv1; 833 cam_periph_lock(periph); 834 ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute, 835 periph->path); 836 cam_periph_unlock(periph); 837 if (ret == 0) 838 bp->bio_completed = bp->bio_length; 839 return ret; 840 } 841 842 static cam_status 843 ndaregister(struct cam_periph *periph, void *arg) 844 { 845 struct nda_softc *softc; 846 struct disk *disk; 847 struct ccb_pathinq cpi; 848 const struct nvme_namespace_data *nsd; 849 const struct nvme_controller_data *cd; 850 char announce_buf[80]; 851 uint8_t flbas_fmt, lbads, vwc_present; 852 u_int maxio; 853 int quirks; 854 855 nsd = nvme_get_identify_ns(periph); 856 cd = nvme_get_identify_cntrl(periph); 857 858 softc = (struct nda_softc *)malloc(sizeof(*softc), M_DEVBUF, 859 M_NOWAIT | M_ZERO); 860 861 if (softc == NULL) { 862 printf("ndaregister: Unable to probe new device. " 863 "Unable to allocate softc\n"); 864 return(CAM_REQ_CMP_ERR); 865 } 866 867 if (cam_iosched_init(&softc->cam_iosched, periph) != 0) { 868 printf("ndaregister: Unable to probe new device. " 869 "Unable to allocate iosched memory\n"); 870 free(softc, M_DEVBUF); 871 return(CAM_REQ_CMP_ERR); 872 } 873 874 /* ident_data parsing */ 875 876 periph->softc = softc; 877 softc->quirks = NDA_Q_NONE; 878 xpt_path_inq(&cpi, periph->path); 879 TASK_INIT(&softc->sysctl_task, 0, ndasysctlinit, periph); 880 881 /* 882 * The name space ID is the lun, save it for later I/O 883 */ 884 softc->nsid = (uint32_t)xpt_path_lun_id(periph->path); 885 886 /* 887 * Register this media as a disk 888 */ 889 (void)cam_periph_acquire(periph); 890 cam_periph_unlock(periph); 891 snprintf(announce_buf, sizeof(announce_buf), 892 "kern.cam.nda.%d.quirks", periph->unit_number); 893 quirks = softc->quirks; 894 TUNABLE_INT_FETCH(announce_buf, &quirks); 895 softc->quirks = quirks; 896 cam_iosched_set_sort_queue(softc->cam_iosched, 0); 897 softc->disk = disk = disk_alloc(); 898 disk->d_rotation_rate = DISK_RR_NON_ROTATING; 899 disk->d_open = ndaopen; 900 disk->d_close = ndaclose; 901 disk->d_strategy = ndastrategy; 902 disk->d_ioctl = ndaioctl; 903 disk->d_getattr = ndagetattr; 904 if (cam_sim_pollable(periph->sim)) 905 disk->d_dump = ndadump; 906 disk->d_gone = ndadiskgonecb; 907 disk->d_name = "nda"; 908 disk->d_drv1 = periph; 909 disk->d_unit = periph->unit_number; 910 maxio = cpi.maxio; /* Honor max I/O size of SIM */ 911 if (maxio == 0) 912 maxio = DFLTPHYS; /* traditional default */ 913 else if (maxio > maxphys) 914 maxio = maxphys; /* for safety */ 915 disk->d_maxsize = maxio; 916 flbas_fmt = (nsd->flbas >> NVME_NS_DATA_FLBAS_FORMAT_SHIFT) & 917 NVME_NS_DATA_FLBAS_FORMAT_MASK; 918 lbads = (nsd->lbaf[flbas_fmt] >> NVME_NS_DATA_LBAF_LBADS_SHIFT) & 919 NVME_NS_DATA_LBAF_LBADS_MASK; 920 disk->d_sectorsize = 1 << lbads; 921 disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze); 922 disk->d_delmaxsize = disk->d_mediasize; 923 disk->d_flags = DISKFLAG_DIRECT_COMPLETION; 924 if (nvme_ctrlr_has_dataset_mgmt(cd)) 925 disk->d_flags |= DISKFLAG_CANDELETE; 926 vwc_present = (cd->vwc >> NVME_CTRLR_DATA_VWC_PRESENT_SHIFT) & 927 NVME_CTRLR_DATA_VWC_PRESENT_MASK; 928 if (vwc_present) 929 disk->d_flags |= DISKFLAG_CANFLUSHCACHE; 930 if ((cpi.hba_misc & PIM_UNMAPPED) != 0) { 931 disk->d_flags |= DISKFLAG_UNMAPPED_BIO; 932 softc->unmappedio = 1; 933 } 934 /* 935 * d_ident and d_descr are both far bigger than the length of either 936 * the serial or model number strings. 937 */ 938 cam_strvis_flag(disk->d_descr, cd->mn, NVME_MODEL_NUMBER_LENGTH, 939 sizeof(disk->d_descr), CAM_STRVIS_FLAG_NONASCII_SPC); 940 941 cam_strvis_flag(disk->d_ident, cd->sn, NVME_SERIAL_NUMBER_LENGTH, 942 sizeof(disk->d_ident), CAM_STRVIS_FLAG_NONASCII_SPC); 943 944 disk->d_hba_vendor = cpi.hba_vendor; 945 disk->d_hba_device = cpi.hba_device; 946 disk->d_hba_subvendor = cpi.hba_subvendor; 947 disk->d_hba_subdevice = cpi.hba_subdevice; 948 snprintf(disk->d_attachment, sizeof(disk->d_attachment), 949 "%s%d", cpi.dev_name, cpi.unit_number); 950 if (((nsd->nsfeat >> NVME_NS_DATA_NSFEAT_NPVALID_SHIFT) & 951 NVME_NS_DATA_NSFEAT_NPVALID_MASK) != 0 && nsd->npwg != 0) 952 disk->d_stripesize = ((nsd->npwg + 1) * disk->d_sectorsize); 953 else 954 disk->d_stripesize = nsd->noiob * disk->d_sectorsize; 955 disk->d_stripeoffset = 0; 956 disk->d_devstat = devstat_new_entry(periph->periph_name, 957 periph->unit_number, disk->d_sectorsize, 958 DEVSTAT_ALL_SUPPORTED, 959 DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport), 960 DEVSTAT_PRIORITY_DISK); 961 /* 962 * Add alias for older nvd drives to ease transition. 963 */ 964 if (nda_nvd_compat) 965 disk_add_alias(disk, "nvd"); 966 967 cam_periph_lock(periph); 968 969 snprintf(announce_buf, sizeof(announce_buf), 970 "%juMB (%ju %u byte sectors)", 971 (uintmax_t)((uintmax_t)disk->d_mediasize / (1024*1024)), 972 (uintmax_t)disk->d_mediasize / disk->d_sectorsize, 973 disk->d_sectorsize); 974 xpt_announce_periph(periph, announce_buf); 975 xpt_announce_quirks(periph, softc->quirks, NDA_Q_BIT_STRING); 976 977 /* 978 * Create our sysctl variables, now that we know 979 * we have successfully attached. 980 */ 981 if (cam_periph_acquire(periph) == 0) 982 taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task); 983 984 /* 985 * Register for device going away and info about the drive 986 * changing (though with NVMe, it can't) 987 */ 988 xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED, 989 ndaasync, periph, periph->path); 990 991 softc->state = NDA_STATE_NORMAL; 992 993 /* 994 * We'll release this reference once GEOM calls us back via 995 * ndadiskgonecb(), telling us that our provider has been freed. 996 */ 997 if (cam_periph_acquire(periph) == 0) 998 disk_create(softc->disk, DISK_VERSION); 999 1000 cam_periph_release_locked(periph); 1001 return(CAM_REQ_CMP); 1002 } 1003 1004 static void 1005 ndastart(struct cam_periph *periph, union ccb *start_ccb) 1006 { 1007 struct nda_softc *softc = (struct nda_softc *)periph->softc; 1008 struct ccb_nvmeio *nvmeio = &start_ccb->nvmeio; 1009 1010 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart\n")); 1011 1012 switch (softc->state) { 1013 case NDA_STATE_NORMAL: 1014 { 1015 struct bio *bp; 1016 1017 bp = cam_iosched_next_bio(softc->cam_iosched); 1018 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart: bio %p\n", bp)); 1019 if (bp == NULL) { 1020 xpt_release_ccb(start_ccb); 1021 break; 1022 } 1023 1024 switch (bp->bio_cmd) { 1025 case BIO_WRITE: 1026 softc->flags |= NDA_FLAG_DIRTY; 1027 /* FALLTHROUGH */ 1028 case BIO_READ: 1029 { 1030 #ifdef CAM_TEST_FAILURE 1031 int fail = 0; 1032 1033 /* 1034 * Support the failure ioctls. If the command is a 1035 * read, and there are pending forced read errors, or 1036 * if a write and pending write errors, then fail this 1037 * operation with EIO. This is useful for testing 1038 * purposes. Also, support having every Nth read fail. 1039 * 1040 * This is a rather blunt tool. 1041 */ 1042 if (bp->bio_cmd == BIO_READ) { 1043 if (softc->force_read_error) { 1044 softc->force_read_error--; 1045 fail = 1; 1046 } 1047 if (softc->periodic_read_error > 0) { 1048 if (++softc->periodic_read_count >= 1049 softc->periodic_read_error) { 1050 softc->periodic_read_count = 0; 1051 fail = 1; 1052 } 1053 } 1054 } else { 1055 if (softc->force_write_error) { 1056 softc->force_write_error--; 1057 fail = 1; 1058 } 1059 } 1060 if (fail) { 1061 biofinish(bp, NULL, EIO); 1062 xpt_release_ccb(start_ccb); 1063 ndaschedule(periph); 1064 return; 1065 } 1066 #endif 1067 KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 || 1068 round_page(bp->bio_bcount + bp->bio_ma_offset) / 1069 PAGE_SIZE == bp->bio_ma_n, 1070 ("Short bio %p", bp)); 1071 nda_nvme_rw_bio(softc, &start_ccb->nvmeio, bp, bp->bio_cmd == BIO_READ ? 1072 NVME_OPC_READ : NVME_OPC_WRITE); 1073 break; 1074 } 1075 case BIO_DELETE: 1076 { 1077 struct nvme_dsm_range *dsm_range, *dsm_end; 1078 struct nda_trim_request *trim; 1079 struct bio *bp1; 1080 int ents; 1081 uint32_t totalcount = 0, ranges = 0; 1082 1083 trim = malloc(sizeof(*trim), M_NVMEDA, M_ZERO | M_NOWAIT); 1084 if (trim == NULL) { 1085 biofinish(bp, NULL, ENOMEM); 1086 xpt_release_ccb(start_ccb); 1087 ndaschedule(periph); 1088 return; 1089 } 1090 TAILQ_INIT(&trim->bps); 1091 bp1 = bp; 1092 ents = min(nitems(trim->dsm), nda_max_trim_entries); 1093 ents = max(ents, 1); 1094 dsm_range = trim->dsm; 1095 dsm_end = dsm_range + ents; 1096 do { 1097 TAILQ_INSERT_TAIL(&trim->bps, bp1, bio_queue); 1098 dsm_range->length = 1099 htole32(bp1->bio_bcount / softc->disk->d_sectorsize); 1100 dsm_range->starting_lba = 1101 htole64(bp1->bio_offset / softc->disk->d_sectorsize); 1102 ranges++; 1103 totalcount += dsm_range->length; 1104 dsm_range++; 1105 if (dsm_range >= dsm_end) 1106 break; 1107 bp1 = cam_iosched_next_trim(softc->cam_iosched); 1108 /* XXX -- Could collapse adjacent ranges, but we don't for now */ 1109 /* XXX -- Could limit based on total payload size */ 1110 } while (bp1 != NULL); 1111 start_ccb->ccb_trim = trim; 1112 nda_nvme_trim(softc, &start_ccb->nvmeio, trim->dsm, 1113 dsm_range - trim->dsm); 1114 start_ccb->ccb_state = NDA_CCB_TRIM; 1115 softc->trim_count++; 1116 softc->trim_ranges += ranges; 1117 softc->trim_lbas += totalcount; 1118 /* 1119 * Note: We can have multiple TRIMs in flight, so we don't call 1120 * cam_iosched_submit_trim(softc->cam_iosched); 1121 * since that forces the I/O scheduler to only schedule one at a time. 1122 * On NVMe drives, this is a performance disaster. 1123 */ 1124 goto out; 1125 } 1126 case BIO_FLUSH: 1127 nda_nvme_flush(softc, nvmeio); 1128 break; 1129 default: 1130 biofinish(bp, NULL, EOPNOTSUPP); 1131 xpt_release_ccb(start_ccb); 1132 ndaschedule(periph); 1133 return; 1134 } 1135 start_ccb->ccb_state = NDA_CCB_BUFFER_IO; 1136 start_ccb->ccb_bp = bp; 1137 out: 1138 start_ccb->ccb_h.flags |= CAM_UNLOCKED; 1139 softc->outstanding_cmds++; 1140 softc->refcount++; /* For submission only */ 1141 cam_periph_unlock(periph); 1142 xpt_action(start_ccb); 1143 cam_periph_lock(periph); 1144 softc->refcount--; /* Submission done */ 1145 1146 /* May have more work to do, so ensure we stay scheduled */ 1147 ndaschedule(periph); 1148 break; 1149 } 1150 } 1151 } 1152 1153 static void 1154 ndadone(struct cam_periph *periph, union ccb *done_ccb) 1155 { 1156 struct nda_softc *softc; 1157 struct ccb_nvmeio *nvmeio = &done_ccb->nvmeio; 1158 struct cam_path *path; 1159 int state; 1160 1161 softc = (struct nda_softc *)periph->softc; 1162 path = done_ccb->ccb_h.path; 1163 1164 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("ndadone\n")); 1165 1166 state = nvmeio->ccb_state & NDA_CCB_TYPE_MASK; 1167 switch (state) { 1168 case NDA_CCB_BUFFER_IO: 1169 case NDA_CCB_TRIM: 1170 { 1171 int error; 1172 1173 cam_periph_lock(periph); 1174 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1175 error = ndaerror(done_ccb, 0, 0); 1176 if (error == ERESTART) { 1177 /* A retry was scheduled, so just return. */ 1178 cam_periph_unlock(periph); 1179 return; 1180 } 1181 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 1182 cam_release_devq(path, 1183 /*relsim_flags*/0, 1184 /*reduction*/0, 1185 /*timeout*/0, 1186 /*getcount_only*/0); 1187 } else { 1188 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 1189 panic("REQ_CMP with QFRZN"); 1190 error = 0; 1191 } 1192 if (state == NDA_CCB_BUFFER_IO) { 1193 struct bio *bp; 1194 1195 bp = (struct bio *)done_ccb->ccb_bp; 1196 bp->bio_error = error; 1197 if (error != 0) { 1198 bp->bio_resid = bp->bio_bcount; 1199 bp->bio_flags |= BIO_ERROR; 1200 } else { 1201 bp->bio_resid = 0; 1202 } 1203 softc->outstanding_cmds--; 1204 1205 /* 1206 * We need to call cam_iosched before we call biodone so that we 1207 * don't measure any activity that happens in the completion 1208 * routine, which in the case of sendfile can be quite 1209 * extensive. 1210 */ 1211 cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb); 1212 xpt_release_ccb(done_ccb); 1213 ndaschedule(periph); 1214 cam_periph_unlock(periph); 1215 biodone(bp); 1216 } else { /* state == NDA_CCB_TRIM */ 1217 struct nda_trim_request *trim; 1218 struct bio *bp1, *bp2; 1219 TAILQ_HEAD(, bio) queue; 1220 1221 trim = nvmeio->ccb_trim; 1222 TAILQ_INIT(&queue); 1223 TAILQ_CONCAT(&queue, &trim->bps, bio_queue); 1224 free(trim, M_NVMEDA); 1225 1226 /* 1227 * Since we can have multiple trims in flight, we don't 1228 * need to call this here. 1229 * cam_iosched_trim_done(softc->cam_iosched); 1230 */ 1231 /* 1232 * The the I/O scheduler that we're finishing the I/O 1233 * so we can keep book. The first one we pass in the CCB 1234 * which has the timing information. The rest we pass in NULL 1235 * so we can keep proper counts. 1236 */ 1237 bp1 = TAILQ_FIRST(&queue); 1238 cam_iosched_bio_complete(softc->cam_iosched, bp1, done_ccb); 1239 xpt_release_ccb(done_ccb); 1240 softc->outstanding_cmds--; 1241 ndaschedule(periph); 1242 cam_periph_unlock(periph); 1243 while ((bp2 = TAILQ_FIRST(&queue)) != NULL) { 1244 TAILQ_REMOVE(&queue, bp2, bio_queue); 1245 bp2->bio_error = error; 1246 if (error != 0) { 1247 bp2->bio_flags |= BIO_ERROR; 1248 bp2->bio_resid = bp1->bio_bcount; 1249 } else 1250 bp2->bio_resid = 0; 1251 if (bp1 != bp2) 1252 cam_iosched_bio_complete(softc->cam_iosched, bp2, NULL); 1253 biodone(bp2); 1254 } 1255 } 1256 return; 1257 } 1258 case NDA_CCB_DUMP: 1259 /* No-op. We're polling */ 1260 return; 1261 case NDA_CCB_PASS: 1262 /* NVME_PASSTHROUGH_CMD runs this CCB and releases it */ 1263 return; 1264 default: 1265 break; 1266 } 1267 xpt_release_ccb(done_ccb); 1268 } 1269 1270 static int 1271 ndaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) 1272 { 1273 #ifdef CAM_IO_STATS 1274 struct nda_softc *softc; 1275 struct cam_periph *periph; 1276 1277 periph = xpt_path_periph(ccb->ccb_h.path); 1278 softc = (struct nda_softc *)periph->softc; 1279 #endif 1280 1281 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1282 case CAM_CMD_TIMEOUT: 1283 #ifdef CAM_IO_STATS 1284 softc->timeouts++; 1285 #endif 1286 break; 1287 case CAM_REQ_ABORTED: 1288 case CAM_REQ_CMP_ERR: 1289 case CAM_REQ_TERMIO: 1290 case CAM_UNREC_HBA_ERROR: 1291 case CAM_DATA_RUN_ERR: 1292 case CAM_ATA_STATUS_ERROR: 1293 #ifdef CAM_IO_STATS 1294 softc->errors++; 1295 #endif 1296 break; 1297 default: 1298 break; 1299 } 1300 1301 return(cam_periph_error(ccb, cam_flags, sense_flags)); 1302 } 1303 1304 /* 1305 * Step through all NDA peripheral drivers, and if the device is still open, 1306 * sync the disk cache to physical media. 1307 */ 1308 static void 1309 ndaflush(void) 1310 { 1311 struct cam_periph *periph; 1312 struct nda_softc *softc; 1313 union ccb *ccb; 1314 int error; 1315 1316 CAM_PERIPH_FOREACH(periph, &ndadriver) { 1317 softc = (struct nda_softc *)periph->softc; 1318 1319 if (SCHEDULER_STOPPED()) { 1320 /* 1321 * If we panicked with the lock held or the periph is not 1322 * open, do not recurse. Otherwise, call ndadump since 1323 * that avoids the sleeping cam_periph_getccb does if no 1324 * CCBs are available. 1325 */ 1326 if (!cam_periph_owned(periph) && 1327 (softc->flags & NDA_FLAG_OPEN)) { 1328 ndadump(softc->disk, NULL, 0, 0); 1329 } 1330 continue; 1331 } 1332 1333 /* 1334 * We only sync the cache if the drive is still open 1335 */ 1336 cam_periph_lock(periph); 1337 if ((softc->flags & NDA_FLAG_OPEN) == 0) { 1338 cam_periph_unlock(periph); 1339 continue; 1340 } 1341 1342 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 1343 nda_nvme_flush(softc, &ccb->nvmeio); 1344 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0, 1345 /*sense_flags*/ SF_NO_RECOVERY | SF_NO_RETRY, 1346 softc->disk->d_devstat); 1347 if (error != 0) 1348 xpt_print(periph->path, "Synchronize cache failed\n"); 1349 xpt_release_ccb(ccb); 1350 cam_periph_unlock(periph); 1351 } 1352 } 1353 1354 static void 1355 ndashutdown(void *arg, int howto) 1356 { 1357 1358 if ((howto & RB_NOSYNC) != 0) 1359 return; 1360 1361 ndaflush(); 1362 } 1363 1364 static void 1365 ndasuspend(void *arg) 1366 { 1367 1368 ndaflush(); 1369 }
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