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 67typedef enum { 68 NDA_STATE_NORMAL 69} nda_state; 70 71typedef 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 82typedef 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 91typedef 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 104struct 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 136struct 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 145static disk_ioctl_t ndaioctl; 146static disk_strategy_t ndastrategy; 147static dumper_t ndadump; 148static periph_init_t ndainit; 149static void ndaasync(void *callback_arg, uint32_t code, 150 struct cam_path *path, void *arg); 151static void ndasysctlinit(void *context, int pending); 152static int ndaflagssysctl(SYSCTL_HANDLER_ARGS); 153static periph_ctor_t ndaregister; 154static periph_dtor_t ndacleanup; 155static periph_start_t ndastart; 156static periph_oninv_t ndaoninvalidate; 157static void ndadone(struct cam_periph *periph, 158 union ccb *done_ccb); 159static int ndaerror(union ccb *ccb, uint32_t cam_flags, 160 uint32_t sense_flags); 161static void ndashutdown(void *arg, int howto); 162static 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 177static 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; 181static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED; 182static int nda_default_timeout = NDA_DEFAULT_TIMEOUT; 183static int nda_max_trim_entries = NDA_MAX_TRIM_ENTRIES; 184static int nda_enable_biospeedup = 1; 185static int nda_nvd_compat = 1; 186SYSCTL_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."); 189SYSCTL_INT(_kern_cam_nda, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN, 190 &nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing."); 191SYSCTL_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 */ 198static int nda_rotating_media = 0; 199 200static struct periph_driver ndadriver = 201{ 202 ndainit, "nda", 203 TAILQ_HEAD_INITIALIZER(ndadriver.units), /* generation */ 0 204}; 205 206PERIPHDRIVER_DECLARE(nda, ndadriver); 207 208static 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 217static void 218nda_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 230static void 231nda_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 244static void 245nda_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 258static void 259nda_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 287static int 288ndaopen(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 317static int 318ndaclose(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 359static void 360ndaschedule(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 370static int 371ndaioctl(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; 443out: 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 */ 460static void 461ndastrategy(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 499static int 500ndadump(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 547static void 548ndainit(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 */ 576static void 577ndadiskgonecb(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 586static void 587ndaoninvalidate(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 616static void 617ndacleanup(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 646static void 647ndaasync(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 704static void 705ndasysctlinit(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 803static int 804ndaflagssysctl(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 821static int 822ndagetattr(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 840static cam_status 841ndaregister(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 if (cam_iosched_init(&softc->cam_iosched, periph) != 0) { 866 printf("ndaregister: Unable to probe new device. " 867 "Unable to allocate iosched memory\n"); 868 free(softc, M_DEVBUF); 869 return(CAM_REQ_CMP_ERR); 870 } 871 872 /* ident_data parsing */ 873 874 periph->softc = softc; 875 softc->quirks = NDA_Q_NONE; 876 xpt_path_inq(&cpi, periph->path); 877 TASK_INIT(&softc->sysctl_task, 0, ndasysctlinit, periph); 878 879 /* 880 * The name space ID is the lun, save it for later I/O 881 */ 882 softc->nsid = (uint32_t)xpt_path_lun_id(periph->path); 883 884 /* 885 * Register this media as a disk 886 */ 887 (void)cam_periph_acquire(periph); 888 cam_periph_unlock(periph); 889 snprintf(announce_buf, sizeof(announce_buf), 890 "kern.cam.nda.%d.quirks", periph->unit_number); 891 quirks = softc->quirks; 892 TUNABLE_INT_FETCH(announce_buf, &quirks); 893 softc->quirks = quirks; 894 cam_iosched_set_sort_queue(softc->cam_iosched, 0); 895 softc->disk = disk = disk_alloc(); 896 disk->d_rotation_rate = DISK_RR_NON_ROTATING; 897 disk->d_open = ndaopen; 898 disk->d_close = ndaclose; 899 disk->d_strategy = ndastrategy; 900 disk->d_ioctl = ndaioctl; 901 disk->d_getattr = ndagetattr; 902 if (cam_sim_pollable(periph->sim)) 903 disk->d_dump = ndadump; 904 disk->d_gone = ndadiskgonecb; 905 disk->d_name = "nda"; 906 disk->d_drv1 = periph; 907 disk->d_unit = periph->unit_number; 908 maxio = cpi.maxio; /* Honor max I/O size of SIM */ 909 if (maxio == 0) 910 maxio = DFLTPHYS; /* traditional default */ 911 else if (maxio > maxphys) 912 maxio = maxphys; /* for safety */ 913 disk->d_maxsize = maxio; 914 flbas_fmt = NVMEV(NVME_NS_DATA_FLBAS_FORMAT, nsd->flbas); 915 lbads = NVMEV(NVME_NS_DATA_LBAF_LBADS, nsd->lbaf[flbas_fmt]); 916 disk->d_sectorsize = 1 << lbads; 917 disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze); 918 disk->d_delmaxsize = disk->d_mediasize; 919 disk->d_flags = DISKFLAG_DIRECT_COMPLETION; 920 if (nvme_ctrlr_has_dataset_mgmt(cd)) 921 disk->d_flags |= DISKFLAG_CANDELETE; 922 vwc_present = NVMEV(NVME_CTRLR_DATA_VWC_PRESENT, cd->vwc); 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_flag(disk->d_descr, cd->mn, NVME_MODEL_NUMBER_LENGTH, 934 sizeof(disk->d_descr), CAM_STRVIS_FLAG_NONASCII_SPC); 935 936 cam_strvis_flag(disk->d_ident, cd->sn, NVME_SERIAL_NUMBER_LENGTH, 937 sizeof(disk->d_ident), CAM_STRVIS_FLAG_NONASCII_SPC); 938 939 disk->d_hba_vendor = cpi.hba_vendor; 940 disk->d_hba_device = cpi.hba_device; 941 disk->d_hba_subvendor = cpi.hba_subvendor; 942 disk->d_hba_subdevice = cpi.hba_subdevice; 943 snprintf(disk->d_attachment, sizeof(disk->d_attachment), 944 "%s%d", cpi.dev_name, cpi.unit_number); 945 if (NVMEV(NVME_NS_DATA_NSFEAT_NPVALID, nsd->nsfeat) != 0 && 946 nsd->npwg != 0) 947 disk->d_stripesize = ((nsd->npwg + 1) * disk->d_sectorsize); 948 else 949 disk->d_stripesize = nsd->noiob * disk->d_sectorsize; 950 disk->d_stripeoffset = 0; 951 disk->d_devstat = devstat_new_entry(periph->periph_name, 952 periph->unit_number, disk->d_sectorsize, 953 DEVSTAT_ALL_SUPPORTED, 954 DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport), 955 DEVSTAT_PRIORITY_DISK); 956 /* 957 * Add alias for older nvd drives to ease transition. 958 */ 959 if (nda_nvd_compat) 960 disk_add_alias(disk, "nvd"); 961 962 cam_periph_lock(periph); 963 964 snprintf(announce_buf, sizeof(announce_buf), 965 "%juMB (%ju %u byte sectors)", 966 (uintmax_t)((uintmax_t)disk->d_mediasize / (1024*1024)), 967 (uintmax_t)disk->d_mediasize / disk->d_sectorsize, 968 disk->d_sectorsize); 969 xpt_announce_periph(periph, announce_buf); 970 xpt_announce_quirks(periph, softc->quirks, NDA_Q_BIT_STRING); 971 972 /* 973 * Create our sysctl variables, now that we know 974 * we have successfully attached. 975 */ 976 if (cam_periph_acquire(periph) == 0) 977 taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task); 978 979 /* 980 * Register for device going away and info about the drive 981 * changing (though with NVMe, it can't) 982 */ 983 xpt_register_async(AC_LOST_DEVICE | AC_ADVINFO_CHANGED, 984 ndaasync, periph, periph->path); 985 986 softc->state = NDA_STATE_NORMAL; 987 988 /* 989 * We'll release this reference once GEOM calls us back via 990 * ndadiskgonecb(), telling us that our provider has been freed. 991 */ 992 if (cam_periph_acquire(periph) == 0) 993 disk_create(softc->disk, DISK_VERSION); 994 995 cam_periph_release_locked(periph); 996 return(CAM_REQ_CMP); 997} 998 999static void 1000ndastart(struct cam_periph *periph, union ccb *start_ccb) 1001{ 1002 struct nda_softc *softc = (struct nda_softc *)periph->softc; 1003 struct ccb_nvmeio *nvmeio = &start_ccb->nvmeio; 1004 1005 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart\n")); 1006 1007 switch (softc->state) { 1008 case NDA_STATE_NORMAL: 1009 { 1010 struct bio *bp; 1011 1012 bp = cam_iosched_next_bio(softc->cam_iosched); 1013 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("ndastart: bio %p\n", bp)); 1014 if (bp == NULL) { 1015 xpt_release_ccb(start_ccb); 1016 break; 1017 } 1018 1019 switch (bp->bio_cmd) { 1020 case BIO_WRITE: 1021 softc->flags |= NDA_FLAG_DIRTY; 1022 /* FALLTHROUGH */ 1023 case BIO_READ: 1024 { 1025#ifdef CAM_TEST_FAILURE 1026 int fail = 0; 1027 1028 /* 1029 * Support the failure ioctls. If the command is a 1030 * read, and there are pending forced read errors, or 1031 * if a write and pending write errors, then fail this 1032 * operation with EIO. This is useful for testing 1033 * purposes. Also, support having every Nth read fail. 1034 * 1035 * This is a rather blunt tool. 1036 */ 1037 if (bp->bio_cmd == BIO_READ) { 1038 if (softc->force_read_error) { 1039 softc->force_read_error--; 1040 fail = 1; 1041 } 1042 if (softc->periodic_read_error > 0) { 1043 if (++softc->periodic_read_count >= 1044 softc->periodic_read_error) { 1045 softc->periodic_read_count = 0; 1046 fail = 1; 1047 } 1048 } 1049 } else { 1050 if (softc->force_write_error) { 1051 softc->force_write_error--; 1052 fail = 1; 1053 } 1054 } 1055 if (fail) { 1056 biofinish(bp, NULL, EIO); 1057 xpt_release_ccb(start_ccb); 1058 ndaschedule(periph); 1059 return; 1060 } 1061#endif 1062 KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 || 1063 round_page(bp->bio_bcount + bp->bio_ma_offset) / 1064 PAGE_SIZE == bp->bio_ma_n, 1065 ("Short bio %p", bp)); 1066 nda_nvme_rw_bio(softc, &start_ccb->nvmeio, bp, bp->bio_cmd == BIO_READ ? 1067 NVME_OPC_READ : NVME_OPC_WRITE); 1068 break; 1069 } 1070 case BIO_DELETE: 1071 { 1072 struct nvme_dsm_range *dsm_range, *dsm_end; 1073 struct nda_trim_request *trim; 1074 struct bio *bp1; 1075 int ents; 1076 uint32_t totalcount = 0, ranges = 0; 1077 1078 trim = malloc(sizeof(*trim), M_NVMEDA, M_ZERO | M_NOWAIT); 1079 if (trim == NULL) { 1080 /* 1081 * We have to drop the periph lock when 1082 * returning ENOMEM. g_io_deliver treats these 1083 * request differently and will recursively call 1084 * the start routine which causes us to get into 1085 * ndastrategy with the periph lock held, 1086 * leading to a panic when its acquired again. 1087 */ 1088 cam_periph_unlock(periph); 1089 biofinish(bp, NULL, ENOMEM); 1090 cam_periph_lock(periph); 1091 xpt_release_ccb(start_ccb); 1092 ndaschedule(periph); 1093 return; 1094 } 1095 TAILQ_INIT(&trim->bps); 1096 bp1 = bp; 1097 ents = min(nitems(trim->dsm), nda_max_trim_entries); 1098 ents = max(ents, 1); 1099 dsm_range = trim->dsm; 1100 dsm_end = dsm_range + ents; 1101 do { 1102 TAILQ_INSERT_TAIL(&trim->bps, bp1, bio_queue); 1103 dsm_range->length = 1104 htole32(bp1->bio_bcount / softc->disk->d_sectorsize); 1105 dsm_range->starting_lba = 1106 htole64(bp1->bio_offset / softc->disk->d_sectorsize); 1107 ranges++; 1108 totalcount += dsm_range->length; 1109 dsm_range++; 1110 if (dsm_range >= dsm_end) 1111 break; 1112 bp1 = cam_iosched_next_trim(softc->cam_iosched); 1113 /* XXX -- Could collapse adjacent ranges, but we don't for now */ 1114 /* XXX -- Could limit based on total payload size */ 1115 } while (bp1 != NULL); 1116 start_ccb->ccb_trim = trim; 1117 nda_nvme_trim(softc, &start_ccb->nvmeio, trim->dsm, 1118 dsm_range - trim->dsm); 1119 start_ccb->ccb_state = NDA_CCB_TRIM; 1120 softc->trim_count++; 1121 softc->trim_ranges += ranges; 1122 softc->trim_lbas += totalcount; 1123 /* 1124 * Note: We can have multiple TRIMs in flight, so we don't call 1125 * cam_iosched_submit_trim(softc->cam_iosched); 1126 * since that forces the I/O scheduler to only schedule one at a time. 1127 * On NVMe drives, this is a performance disaster. 1128 */ 1129 goto out; 1130 } 1131 case BIO_FLUSH: 1132 nda_nvme_flush(softc, nvmeio); 1133 break; 1134 default: 1135 biofinish(bp, NULL, EOPNOTSUPP); 1136 xpt_release_ccb(start_ccb); 1137 ndaschedule(periph); 1138 return; 1139 } 1140 start_ccb->ccb_state = NDA_CCB_BUFFER_IO; 1141 start_ccb->ccb_bp = bp; 1142out: 1143 start_ccb->ccb_h.flags |= CAM_UNLOCKED; 1144 softc->outstanding_cmds++; 1145 softc->refcount++; /* For submission only */ 1146 cam_periph_unlock(periph); 1147 xpt_action(start_ccb); 1148 cam_periph_lock(periph); 1149 softc->refcount--; /* Submission done */ 1150 1151 /* May have more work to do, so ensure we stay scheduled */ 1152 ndaschedule(periph); 1153 break; 1154 } 1155 } 1156} 1157 1158static void 1159ndadone(struct cam_periph *periph, union ccb *done_ccb) 1160{ 1161 struct nda_softc *softc; 1162 struct ccb_nvmeio *nvmeio = &done_ccb->nvmeio; 1163 struct cam_path *path; 1164 int state; 1165 1166 softc = (struct nda_softc *)periph->softc; 1167 path = done_ccb->ccb_h.path; 1168 1169 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("ndadone\n")); 1170 1171 state = nvmeio->ccb_state & NDA_CCB_TYPE_MASK; 1172 switch (state) { 1173 case NDA_CCB_BUFFER_IO: 1174 case NDA_CCB_TRIM: 1175 { 1176 int error; 1177 1178 cam_periph_lock(periph); 1179 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1180 error = ndaerror(done_ccb, 0, 0); 1181 if (error == ERESTART) { 1182 /* A retry was scheduled, so just return. */ 1183 cam_periph_unlock(periph); 1184 return; 1185 } 1186 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 1187 cam_release_devq(path, 1188 /*relsim_flags*/0, 1189 /*reduction*/0, 1190 /*timeout*/0, 1191 /*getcount_only*/0); 1192 } else { 1193 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 1194 panic("REQ_CMP with QFRZN"); 1195 error = 0; 1196 } 1197 if (state == NDA_CCB_BUFFER_IO) { 1198 struct bio *bp; 1199 1200 bp = (struct bio *)done_ccb->ccb_bp; 1201 bp->bio_error = error; 1202 if (error != 0) { 1203 bp->bio_resid = bp->bio_bcount; 1204 bp->bio_flags |= BIO_ERROR; 1205 } else { 1206 bp->bio_resid = 0; 1207 } 1208 softc->outstanding_cmds--; 1209 1210 /* 1211 * We need to call cam_iosched before we call biodone so that we 1212 * don't measure any activity that happens in the completion 1213 * routine, which in the case of sendfile can be quite 1214 * extensive. 1215 */ 1216 cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb); 1217 xpt_release_ccb(done_ccb); 1218 ndaschedule(periph); 1219 cam_periph_unlock(periph); 1220 biodone(bp); 1221 } else { /* state == NDA_CCB_TRIM */ 1222 struct nda_trim_request *trim; 1223 struct bio *bp1, *bp2; 1224 TAILQ_HEAD(, bio) queue; 1225 1226 trim = nvmeio->ccb_trim; 1227 TAILQ_INIT(&queue); 1228 TAILQ_CONCAT(&queue, &trim->bps, bio_queue); 1229 free(trim, M_NVMEDA); 1230 1231 /* 1232 * Since we can have multiple trims in flight, we don't 1233 * need to call this here. 1234 * cam_iosched_trim_done(softc->cam_iosched); 1235 */ 1236 /* 1237 * The the I/O scheduler that we're finishing the I/O 1238 * so we can keep book. The first one we pass in the CCB 1239 * which has the timing information. The rest we pass in NULL 1240 * so we can keep proper counts. 1241 */ 1242 bp1 = TAILQ_FIRST(&queue); 1243 cam_iosched_bio_complete(softc->cam_iosched, bp1, done_ccb); 1244 xpt_release_ccb(done_ccb); 1245 softc->outstanding_cmds--; 1246 ndaschedule(periph); 1247 cam_periph_unlock(periph); 1248 while ((bp2 = TAILQ_FIRST(&queue)) != NULL) { 1249 TAILQ_REMOVE(&queue, bp2, bio_queue); 1250 bp2->bio_error = error; 1251 if (error != 0) { 1252 bp2->bio_flags |= BIO_ERROR; 1253 bp2->bio_resid = bp1->bio_bcount; 1254 } else 1255 bp2->bio_resid = 0; 1256 if (bp1 != bp2) 1257 cam_iosched_bio_complete(softc->cam_iosched, bp2, NULL); 1258 biodone(bp2); 1259 } 1260 } 1261 return; 1262 } 1263 case NDA_CCB_DUMP: 1264 /* No-op. We're polling */ 1265 return; 1266 case NDA_CCB_PASS: 1267 /* NVME_PASSTHROUGH_CMD runs this CCB and releases it */ 1268 return; 1269 default: 1270 break; 1271 } 1272 xpt_release_ccb(done_ccb); 1273} 1274 1275static int 1276ndaerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags) 1277{ 1278#ifdef CAM_IO_STATS 1279 struct nda_softc *softc; 1280 struct cam_periph *periph; 1281 1282 periph = xpt_path_periph(ccb->ccb_h.path); 1283 softc = (struct nda_softc *)periph->softc; 1284#endif 1285 1286 switch (ccb->ccb_h.status & CAM_STATUS_MASK) { 1287 case CAM_CMD_TIMEOUT: 1288#ifdef CAM_IO_STATS 1289 softc->timeouts++; 1290#endif 1291 break; 1292 case CAM_REQ_CMP_ERR: 1293 case CAM_NVME_STATUS_ERROR: 1294#ifdef CAM_IO_STATS 1295 softc->errors++; 1296#endif 1297 break; 1298 default: 1299 break; 1300 } 1301 1302 return(cam_periph_error(ccb, cam_flags, sense_flags)); 1303} 1304 1305/* 1306 * Step through all NDA peripheral drivers, and if the device is still open, 1307 * sync the disk cache to physical media. 1308 */ 1309static void 1310ndaflush(void) 1311{ 1312 struct cam_periph *periph; 1313 struct nda_softc *softc; 1314 union ccb *ccb; 1315 int error; 1316 1317 CAM_PERIPH_FOREACH(periph, &ndadriver) { 1318 softc = (struct nda_softc *)periph->softc; 1319 1320 if (SCHEDULER_STOPPED()) { 1321 /* 1322 * If we panicked with the lock held or the periph is not 1323 * open, do not recurse. Otherwise, call ndadump since 1324 * that avoids the sleeping cam_periph_getccb does if no 1325 * CCBs are available. 1326 */ 1327 if (!cam_periph_owned(periph) && 1328 (softc->flags & NDA_FLAG_OPEN)) { 1329 ndadump(softc->disk, NULL, 0, 0); 1330 } 1331 continue; 1332 } 1333 1334 /* 1335 * We only sync the cache if the drive is still open 1336 */ 1337 cam_periph_lock(periph); 1338 if ((softc->flags & NDA_FLAG_OPEN) == 0) { 1339 cam_periph_unlock(periph); 1340 continue; 1341 } 1342 1343 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL); 1344 nda_nvme_flush(softc, &ccb->nvmeio); 1345 error = cam_periph_runccb(ccb, ndaerror, /*cam_flags*/0, 1346 /*sense_flags*/ SF_NO_RECOVERY | SF_NO_RETRY, 1347 softc->disk->d_devstat); 1348 if (error != 0) 1349 xpt_print(periph->path, "Synchronize cache failed\n"); 1350 xpt_release_ccb(ccb); 1351 cam_periph_unlock(periph); 1352 } 1353} 1354 1355static void 1356ndashutdown(void *arg, int howto) 1357{ 1358 1359 if ((howto & RB_NOSYNC) != 0) 1360 return; 1361 1362 ndaflush(); 1363} 1364 1365static void 1366ndasuspend(void *arg) 1367{ 1368 1369 ndaflush(); 1370} 1371