1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2012 Garrett D'Amore <garrett@damore.org>. All rights reserved. 24 * Copyright 2012 Alexey Zaytsev <alexey.zaytsev@gmail.com> All rights reserved. 25 * Copyright 2016 Nexenta Systems, Inc. All rights reserved. 26 * Copyright 2017 The MathWorks, Inc. All rights reserved. 27 * Copyright 2019 Western Digital Corporation. 28 * Copyright 2020 Joyent, Inc. 29 * Copyright 2022 OmniOS Community Edition (OmniOSce) Association. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/ksynch.h> 34 #include <sys/kmem.h> 35 #include <sys/file.h> 36 #include <sys/errno.h> 37 #include <sys/open.h> 38 #include <sys/buf.h> 39 #include <sys/uio.h> 40 #include <sys/aio_req.h> 41 #include <sys/cred.h> 42 #include <sys/modctl.h> 43 #include <sys/cmlb.h> 44 #include <sys/conf.h> 45 #include <sys/devops.h> 46 #include <sys/list.h> 47 #include <sys/sysmacros.h> 48 #include <sys/dkio.h> 49 #include <sys/dkioc_free_util.h> 50 #include <sys/vtoc.h> 51 #include <sys/scsi/scsi.h> /* for DTYPE_DIRECT */ 52 #include <sys/kstat.h> 53 #include <sys/fs/dv_node.h> 54 #include <sys/ddi.h> 55 #include <sys/sunddi.h> 56 #include <sys/note.h> 57 #include <sys/blkdev.h> 58 #include <sys/scsi/impl/inquiry.h> 59 #include <sys/taskq.h> 60 #include <sys/taskq_impl.h> 61 #include <sys/disp.h> 62 #include <sys/sysevent/eventdefs.h> 63 #include <sys/sysevent/dev.h> 64 65 /* 66 * blkdev is a driver which provides a lot of the common functionality 67 * a block device driver may need and helps by removing code which 68 * is frequently duplicated in block device drivers. 69 * 70 * Within this driver all the struct cb_ops functions required for a 71 * block device driver are written with appropriate call back functions 72 * to be provided by the parent driver. 73 * 74 * To use blkdev, a driver needs to: 75 * 1. Create a bd_ops_t structure which has the call back operations 76 * blkdev will use. 77 * 2. Create a handle by calling bd_alloc_handle(). One of the 78 * arguments to this function is the bd_ops_t. 79 * 3. Call bd_attach_handle(). This will instantiate a blkdev device 80 * as a child device node of the calling driver. 81 * 82 * A parent driver is not restricted to just allocating and attaching a 83 * single instance, it may attach as many as it wishes. For each handle 84 * attached, appropriate entries in /dev/[r]dsk are created. 85 * 86 * The bd_ops_t routines that a parent of blkdev need to provide are: 87 * 88 * o_drive_info: Provide information to blkdev such as how many I/O queues 89 * to create and the size of those queues. Also some device 90 * specifics such as EUI, vendor, product, model, serial 91 * number .... 92 * 93 * o_media_info: Provide information about the media. Eg size and block size. 94 * 95 * o_devid_init: Creates and initializes the device id. Typically calls 96 * ddi_devid_init(). 97 * 98 * o_sync_cache: Issues a device appropriate command to flush any write 99 * caches. 100 * 101 * o_read: Read data as described by bd_xfer_t argument. 102 * 103 * o_write: Write data as described by bd_xfer_t argument. 104 * 105 * o_free_space: Free the space described by bd_xfer_t argument (optional). 106 * 107 * Queues 108 * ------ 109 * Part of the drive_info data is a queue count. blkdev will create 110 * "queue count" number of waitq/runq pairs. Each waitq/runq pair 111 * operates independently. As an I/O is scheduled up to the parent 112 * driver via o_read or o_write its queue number is given. If the 113 * parent driver supports multiple hardware queues it can then select 114 * where to submit the I/O request. 115 * 116 * Currently blkdev uses a simplistic round-robin queue selection method. 117 * It has the advantage that it is lockless. In the future it will be 118 * worthwhile reviewing this strategy for something which prioritizes queues 119 * depending on how busy they are. 120 * 121 * Each waitq/runq pair is protected by its mutex (q_iomutex). Incoming 122 * I/O requests are initially added to the waitq. They are taken off the 123 * waitq, added to the runq and submitted, providing the runq is less 124 * than the qsize as specified in the drive_info. As an I/O request 125 * completes, the parent driver is required to call bd_xfer_done(), which 126 * will remove the I/O request from the runq and pass I/O completion 127 * status up the stack. 128 * 129 * Locks 130 * ----- 131 * There are 5 instance global locks d_ocmutex, d_ksmutex, d_errmutex, 132 * d_statemutex and d_dle_mutex. As well a q_iomutex per waitq/runq pair. 133 * 134 * Lock Hierarchy 135 * -------------- 136 * The only two locks which may be held simultaneously are q_iomutex and 137 * d_ksmutex. In all cases q_iomutex must be acquired before d_ksmutex. 138 */ 139 140 #define BD_MAXPART 64 141 #define BDINST(dev) (getminor(dev) / BD_MAXPART) 142 #define BDPART(dev) (getminor(dev) % BD_MAXPART) 143 144 typedef struct bd bd_t; 145 typedef struct bd_xfer_impl bd_xfer_impl_t; 146 typedef struct bd_queue bd_queue_t; 147 148 typedef enum { 149 BD_DLE_PENDING = 1 << 0, 150 BD_DLE_RUNNING = 1 << 1 151 } bd_dle_state_t; 152 153 struct bd { 154 void *d_private; 155 dev_info_t *d_dip; 156 kmutex_t d_ocmutex; /* open/close */ 157 kmutex_t d_ksmutex; /* kstat */ 158 kmutex_t d_errmutex; 159 kmutex_t d_statemutex; 160 kcondvar_t d_statecv; 161 enum dkio_state d_state; 162 cmlb_handle_t d_cmlbh; 163 unsigned d_open_lyr[BD_MAXPART]; /* open count */ 164 uint64_t d_open_excl; /* bit mask indexed by partition */ 165 uint64_t d_open_reg[OTYPCNT]; /* bit mask */ 166 uint64_t d_io_counter; 167 168 uint32_t d_qcount; 169 uint32_t d_qactive; 170 uint32_t d_maxxfer; 171 uint32_t d_blkshift; 172 uint32_t d_pblkshift; 173 uint64_t d_numblks; 174 ddi_devid_t d_devid; 175 176 uint64_t d_max_free_seg; 177 uint64_t d_max_free_blks; 178 uint64_t d_max_free_seg_blks; 179 uint64_t d_free_align; 180 181 kmem_cache_t *d_cache; 182 bd_queue_t *d_queues; 183 kstat_t *d_ksp; 184 kstat_io_t *d_kiop; 185 kstat_t *d_errstats; 186 struct bd_errstats *d_kerr; 187 188 boolean_t d_rdonly; 189 boolean_t d_ssd; 190 boolean_t d_removable; 191 boolean_t d_hotpluggable; 192 boolean_t d_use_dma; 193 194 ddi_dma_attr_t d_dma; 195 bd_ops_t d_ops; 196 bd_handle_t d_handle; 197 198 kmutex_t d_dle_mutex; 199 taskq_ent_t d_dle_ent; 200 bd_dle_state_t d_dle_state; 201 }; 202 203 struct bd_handle { 204 bd_ops_t h_ops; 205 ddi_dma_attr_t *h_dma; 206 dev_info_t *h_parent; 207 dev_info_t *h_child; 208 void *h_private; 209 bd_t *h_bd; 210 char *h_name; 211 char h_addr[30]; /* enough for w%0.16x,%X */ 212 }; 213 214 struct bd_xfer_impl { 215 bd_xfer_t i_public; 216 list_node_t i_linkage; 217 bd_t *i_bd; 218 buf_t *i_bp; 219 bd_queue_t *i_bq; 220 uint_t i_num_win; 221 uint_t i_cur_win; 222 off_t i_offset; 223 int (*i_func)(void *, bd_xfer_t *); 224 uint32_t i_blkshift; 225 size_t i_len; 226 size_t i_resid; 227 }; 228 229 struct bd_queue { 230 kmutex_t q_iomutex; 231 uint32_t q_qsize; 232 uint32_t q_qactive; 233 list_t q_runq; 234 list_t q_waitq; 235 }; 236 237 #define i_dmah i_public.x_dmah 238 #define i_dmac i_public.x_dmac 239 #define i_ndmac i_public.x_ndmac 240 #define i_kaddr i_public.x_kaddr 241 #define i_nblks i_public.x_nblks 242 #define i_blkno i_public.x_blkno 243 #define i_flags i_public.x_flags 244 #define i_qnum i_public.x_qnum 245 #define i_dfl i_public.x_dfl 246 247 #define CAN_FREESPACE(bd) \ 248 (((bd)->d_ops.o_free_space == NULL) ? B_FALSE : B_TRUE) 249 250 /* 251 * Private prototypes. 252 */ 253 254 static void bd_prop_update_inqstring(dev_info_t *, char *, char *, size_t); 255 static void bd_create_inquiry_props(dev_info_t *, bd_drive_t *); 256 static void bd_create_errstats(bd_t *, int, bd_drive_t *); 257 static void bd_destroy_errstats(bd_t *); 258 static void bd_errstats_setstr(kstat_named_t *, char *, size_t, char *); 259 static void bd_init_errstats(bd_t *, bd_drive_t *); 260 static void bd_fini_errstats(bd_t *); 261 262 static int bd_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); 263 static int bd_attach(dev_info_t *, ddi_attach_cmd_t); 264 static int bd_detach(dev_info_t *, ddi_detach_cmd_t); 265 266 static int bd_open(dev_t *, int, int, cred_t *); 267 static int bd_close(dev_t, int, int, cred_t *); 268 static int bd_strategy(struct buf *); 269 static int bd_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); 270 static int bd_dump(dev_t, caddr_t, daddr_t, int); 271 static int bd_read(dev_t, struct uio *, cred_t *); 272 static int bd_write(dev_t, struct uio *, cred_t *); 273 static int bd_aread(dev_t, struct aio_req *, cred_t *); 274 static int bd_awrite(dev_t, struct aio_req *, cred_t *); 275 static int bd_prop_op(dev_t, dev_info_t *, ddi_prop_op_t, int, char *, 276 caddr_t, int *); 277 278 static int bd_tg_rdwr(dev_info_t *, uchar_t, void *, diskaddr_t, size_t, 279 void *); 280 static int bd_tg_getinfo(dev_info_t *, int, void *, void *); 281 static int bd_xfer_ctor(void *, void *, int); 282 static void bd_xfer_dtor(void *, void *); 283 static void bd_sched(bd_t *, bd_queue_t *); 284 static void bd_submit(bd_t *, bd_xfer_impl_t *); 285 static void bd_runq_exit(bd_xfer_impl_t *, int); 286 static void bd_update_state(bd_t *); 287 static int bd_check_state(bd_t *, enum dkio_state *); 288 static int bd_flush_write_cache(bd_t *, struct dk_callback *); 289 static int bd_check_uio(dev_t, struct uio *); 290 static int bd_free_space(dev_t, bd_t *, dkioc_free_list_t *); 291 292 struct cmlb_tg_ops bd_tg_ops = { 293 TG_DK_OPS_VERSION_1, 294 bd_tg_rdwr, 295 bd_tg_getinfo, 296 }; 297 298 static struct cb_ops bd_cb_ops = { 299 bd_open, /* open */ 300 bd_close, /* close */ 301 bd_strategy, /* strategy */ 302 nodev, /* print */ 303 bd_dump, /* dump */ 304 bd_read, /* read */ 305 bd_write, /* write */ 306 bd_ioctl, /* ioctl */ 307 nodev, /* devmap */ 308 nodev, /* mmap */ 309 nodev, /* segmap */ 310 nochpoll, /* poll */ 311 bd_prop_op, /* cb_prop_op */ 312 0, /* streamtab */ 313 D_64BIT | D_MP, /* Driver comaptibility flag */ 314 CB_REV, /* cb_rev */ 315 bd_aread, /* async read */ 316 bd_awrite /* async write */ 317 }; 318 319 struct dev_ops bd_dev_ops = { 320 DEVO_REV, /* devo_rev, */ 321 0, /* refcnt */ 322 bd_getinfo, /* getinfo */ 323 nulldev, /* identify */ 324 nulldev, /* probe */ 325 bd_attach, /* attach */ 326 bd_detach, /* detach */ 327 nodev, /* reset */ 328 &bd_cb_ops, /* driver operations */ 329 NULL, /* bus operations */ 330 NULL, /* power */ 331 ddi_quiesce_not_needed, /* quiesce */ 332 }; 333 334 static struct modldrv modldrv = { 335 &mod_driverops, 336 "Generic Block Device", 337 &bd_dev_ops, 338 }; 339 340 static struct modlinkage modlinkage = { 341 MODREV_1, { &modldrv, NULL } 342 }; 343 344 static void *bd_state; 345 static krwlock_t bd_lock; 346 static taskq_t *bd_taskq; 347 348 int 349 _init(void) 350 { 351 char taskq_name[TASKQ_NAMELEN]; 352 const char *name; 353 int rv; 354 355 rv = ddi_soft_state_init(&bd_state, sizeof (struct bd), 2); 356 if (rv != DDI_SUCCESS) 357 return (rv); 358 359 name = mod_modname(&modlinkage); 360 (void) snprintf(taskq_name, sizeof (taskq_name), "%s_taskq", name); 361 bd_taskq = taskq_create(taskq_name, 1, minclsyspri, 0, 0, 0); 362 if (bd_taskq == NULL) { 363 cmn_err(CE_WARN, "%s: unable to create %s", name, taskq_name); 364 ddi_soft_state_fini(&bd_state); 365 return (DDI_FAILURE); 366 } 367 368 rw_init(&bd_lock, NULL, RW_DRIVER, NULL); 369 370 rv = mod_install(&modlinkage); 371 if (rv != DDI_SUCCESS) { 372 rw_destroy(&bd_lock); 373 taskq_destroy(bd_taskq); 374 ddi_soft_state_fini(&bd_state); 375 } 376 return (rv); 377 } 378 379 int 380 _fini(void) 381 { 382 int rv; 383 384 rv = mod_remove(&modlinkage); 385 if (rv == DDI_SUCCESS) { 386 rw_destroy(&bd_lock); 387 taskq_destroy(bd_taskq); 388 ddi_soft_state_fini(&bd_state); 389 } 390 return (rv); 391 } 392 393 int 394 _info(struct modinfo *modinfop) 395 { 396 return (mod_info(&modlinkage, modinfop)); 397 } 398 399 static int 400 bd_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **resultp) 401 { 402 bd_t *bd; 403 minor_t inst; 404 405 _NOTE(ARGUNUSED(dip)); 406 407 inst = BDINST((dev_t)arg); 408 409 switch (cmd) { 410 case DDI_INFO_DEVT2DEVINFO: 411 bd = ddi_get_soft_state(bd_state, inst); 412 if (bd == NULL) { 413 return (DDI_FAILURE); 414 } 415 *resultp = (void *)bd->d_dip; 416 break; 417 418 case DDI_INFO_DEVT2INSTANCE: 419 *resultp = (void *)(intptr_t)inst; 420 break; 421 422 default: 423 return (DDI_FAILURE); 424 } 425 return (DDI_SUCCESS); 426 } 427 428 static void 429 bd_prop_update_inqstring(dev_info_t *dip, char *name, char *data, size_t len) 430 { 431 int ilen; 432 char *data_string; 433 434 ilen = scsi_ascii_inquiry_len(data, len); 435 ASSERT3U(ilen, <=, len); 436 if (ilen <= 0) 437 return; 438 /* ensure null termination */ 439 data_string = kmem_zalloc(ilen + 1, KM_SLEEP); 440 bcopy(data, data_string, ilen); 441 (void) ndi_prop_update_string(DDI_DEV_T_NONE, dip, name, data_string); 442 kmem_free(data_string, ilen + 1); 443 } 444 445 static void 446 bd_create_inquiry_props(dev_info_t *dip, bd_drive_t *drive) 447 { 448 if (drive->d_vendor_len > 0) 449 bd_prop_update_inqstring(dip, INQUIRY_VENDOR_ID, 450 drive->d_vendor, drive->d_vendor_len); 451 452 if (drive->d_product_len > 0) 453 bd_prop_update_inqstring(dip, INQUIRY_PRODUCT_ID, 454 drive->d_product, drive->d_product_len); 455 456 if (drive->d_serial_len > 0) 457 bd_prop_update_inqstring(dip, INQUIRY_SERIAL_NO, 458 drive->d_serial, drive->d_serial_len); 459 460 if (drive->d_revision_len > 0) 461 bd_prop_update_inqstring(dip, INQUIRY_REVISION_ID, 462 drive->d_revision, drive->d_revision_len); 463 } 464 465 static void 466 bd_create_errstats(bd_t *bd, int inst, bd_drive_t *drive) 467 { 468 char ks_module[KSTAT_STRLEN]; 469 char ks_name[KSTAT_STRLEN]; 470 int ndata = sizeof (struct bd_errstats) / sizeof (kstat_named_t); 471 472 if (bd->d_errstats != NULL) 473 return; 474 475 (void) snprintf(ks_module, sizeof (ks_module), "%serr", 476 ddi_driver_name(bd->d_dip)); 477 (void) snprintf(ks_name, sizeof (ks_name), "%s%d,err", 478 ddi_driver_name(bd->d_dip), inst); 479 480 bd->d_errstats = kstat_create(ks_module, inst, ks_name, "device_error", 481 KSTAT_TYPE_NAMED, ndata, KSTAT_FLAG_PERSISTENT); 482 483 mutex_init(&bd->d_errmutex, NULL, MUTEX_DRIVER, NULL); 484 if (bd->d_errstats == NULL) { 485 /* 486 * Even if we cannot create the kstat, we create a 487 * scratch kstat. The reason for this is to ensure 488 * that we can update the kstat all of the time, 489 * without adding an extra branch instruction. 490 */ 491 bd->d_kerr = kmem_zalloc(sizeof (struct bd_errstats), 492 KM_SLEEP); 493 } else { 494 bd->d_errstats->ks_lock = &bd->d_errmutex; 495 bd->d_kerr = (struct bd_errstats *)bd->d_errstats->ks_data; 496 } 497 498 kstat_named_init(&bd->d_kerr->bd_softerrs, "Soft Errors", 499 KSTAT_DATA_UINT32); 500 kstat_named_init(&bd->d_kerr->bd_harderrs, "Hard Errors", 501 KSTAT_DATA_UINT32); 502 kstat_named_init(&bd->d_kerr->bd_transerrs, "Transport Errors", 503 KSTAT_DATA_UINT32); 504 505 if (drive->d_model_len > 0) { 506 kstat_named_init(&bd->d_kerr->bd_model, "Model", 507 KSTAT_DATA_STRING); 508 } else { 509 kstat_named_init(&bd->d_kerr->bd_vid, "Vendor", 510 KSTAT_DATA_STRING); 511 kstat_named_init(&bd->d_kerr->bd_pid, "Product", 512 KSTAT_DATA_STRING); 513 } 514 515 kstat_named_init(&bd->d_kerr->bd_revision, "Revision", 516 KSTAT_DATA_STRING); 517 kstat_named_init(&bd->d_kerr->bd_serial, "Serial No", 518 KSTAT_DATA_STRING); 519 kstat_named_init(&bd->d_kerr->bd_capacity, "Size", 520 KSTAT_DATA_ULONGLONG); 521 kstat_named_init(&bd->d_kerr->bd_rq_media_err, "Media Error", 522 KSTAT_DATA_UINT32); 523 kstat_named_init(&bd->d_kerr->bd_rq_ntrdy_err, "Device Not Ready", 524 KSTAT_DATA_UINT32); 525 kstat_named_init(&bd->d_kerr->bd_rq_nodev_err, "No Device", 526 KSTAT_DATA_UINT32); 527 kstat_named_init(&bd->d_kerr->bd_rq_recov_err, "Recoverable", 528 KSTAT_DATA_UINT32); 529 kstat_named_init(&bd->d_kerr->bd_rq_illrq_err, "Illegal Request", 530 KSTAT_DATA_UINT32); 531 kstat_named_init(&bd->d_kerr->bd_rq_pfa_err, 532 "Predictive Failure Analysis", KSTAT_DATA_UINT32); 533 534 bd->d_errstats->ks_private = bd; 535 536 kstat_install(bd->d_errstats); 537 bd_init_errstats(bd, drive); 538 } 539 540 static void 541 bd_destroy_errstats(bd_t *bd) 542 { 543 if (bd->d_errstats != NULL) { 544 bd_fini_errstats(bd); 545 kstat_delete(bd->d_errstats); 546 bd->d_errstats = NULL; 547 } else { 548 kmem_free(bd->d_kerr, sizeof (struct bd_errstats)); 549 bd->d_kerr = NULL; 550 mutex_destroy(&bd->d_errmutex); 551 } 552 } 553 554 static void 555 bd_errstats_setstr(kstat_named_t *k, char *str, size_t len, char *alt) 556 { 557 char *tmp; 558 size_t km_len; 559 560 if (KSTAT_NAMED_STR_PTR(k) == NULL) { 561 if (len > 0) 562 km_len = strnlen(str, len); 563 else if (alt != NULL) 564 km_len = strlen(alt); 565 else 566 return; 567 568 tmp = kmem_alloc(km_len + 1, KM_SLEEP); 569 bcopy(len > 0 ? str : alt, tmp, km_len); 570 tmp[km_len] = '\0'; 571 572 kstat_named_setstr(k, tmp); 573 } 574 } 575 576 static void 577 bd_errstats_clrstr(kstat_named_t *k) 578 { 579 if (KSTAT_NAMED_STR_PTR(k) == NULL) 580 return; 581 582 kmem_free(KSTAT_NAMED_STR_PTR(k), KSTAT_NAMED_STR_BUFLEN(k)); 583 kstat_named_setstr(k, NULL); 584 } 585 586 static void 587 bd_init_errstats(bd_t *bd, bd_drive_t *drive) 588 { 589 struct bd_errstats *est = bd->d_kerr; 590 591 mutex_enter(&bd->d_errmutex); 592 593 if (drive->d_model_len > 0 && 594 KSTAT_NAMED_STR_PTR(&est->bd_model) == NULL) { 595 bd_errstats_setstr(&est->bd_model, drive->d_model, 596 drive->d_model_len, NULL); 597 } else { 598 bd_errstats_setstr(&est->bd_vid, drive->d_vendor, 599 drive->d_vendor_len, "Unknown "); 600 bd_errstats_setstr(&est->bd_pid, drive->d_product, 601 drive->d_product_len, "Unknown "); 602 } 603 604 bd_errstats_setstr(&est->bd_revision, drive->d_revision, 605 drive->d_revision_len, "0001"); 606 bd_errstats_setstr(&est->bd_serial, drive->d_serial, 607 drive->d_serial_len, "0 "); 608 609 mutex_exit(&bd->d_errmutex); 610 } 611 612 static void 613 bd_fini_errstats(bd_t *bd) 614 { 615 struct bd_errstats *est = bd->d_kerr; 616 617 mutex_enter(&bd->d_errmutex); 618 619 bd_errstats_clrstr(&est->bd_model); 620 bd_errstats_clrstr(&est->bd_vid); 621 bd_errstats_clrstr(&est->bd_pid); 622 bd_errstats_clrstr(&est->bd_revision); 623 bd_errstats_clrstr(&est->bd_serial); 624 625 mutex_exit(&bd->d_errmutex); 626 } 627 628 static void 629 bd_queues_free(bd_t *bd) 630 { 631 uint32_t i; 632 633 for (i = 0; i < bd->d_qcount; i++) { 634 bd_queue_t *bq = &bd->d_queues[i]; 635 636 mutex_destroy(&bq->q_iomutex); 637 list_destroy(&bq->q_waitq); 638 list_destroy(&bq->q_runq); 639 } 640 641 kmem_free(bd->d_queues, sizeof (*bd->d_queues) * bd->d_qcount); 642 } 643 644 static int 645 bd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 646 { 647 int inst; 648 bd_handle_t hdl; 649 bd_t *bd; 650 bd_drive_t drive; 651 uint32_t i; 652 int rv; 653 char name[16]; 654 char kcache[32]; 655 656 switch (cmd) { 657 case DDI_ATTACH: 658 break; 659 case DDI_RESUME: 660 /* We don't do anything native for suspend/resume */ 661 return (DDI_SUCCESS); 662 default: 663 return (DDI_FAILURE); 664 } 665 666 inst = ddi_get_instance(dip); 667 hdl = ddi_get_parent_data(dip); 668 669 (void) snprintf(name, sizeof (name), "%s%d", 670 ddi_driver_name(dip), ddi_get_instance(dip)); 671 (void) snprintf(kcache, sizeof (kcache), "%s_xfer", name); 672 673 if (hdl == NULL) { 674 cmn_err(CE_WARN, "%s: missing parent data!", name); 675 return (DDI_FAILURE); 676 } 677 678 if (ddi_soft_state_zalloc(bd_state, inst) != DDI_SUCCESS) { 679 cmn_err(CE_WARN, "%s: unable to zalloc soft state!", name); 680 return (DDI_FAILURE); 681 } 682 bd = ddi_get_soft_state(bd_state, inst); 683 684 if (hdl->h_dma) { 685 bd->d_dma = *(hdl->h_dma); 686 bd->d_dma.dma_attr_granular = 687 max(DEV_BSIZE, bd->d_dma.dma_attr_granular); 688 bd->d_use_dma = B_TRUE; 689 690 if (bd->d_maxxfer && 691 (bd->d_maxxfer != bd->d_dma.dma_attr_maxxfer)) { 692 cmn_err(CE_WARN, 693 "%s: inconsistent maximum transfer size!", 694 name); 695 /* We force it */ 696 bd->d_maxxfer = bd->d_dma.dma_attr_maxxfer; 697 } else { 698 bd->d_maxxfer = bd->d_dma.dma_attr_maxxfer; 699 } 700 } else { 701 bd->d_use_dma = B_FALSE; 702 if (bd->d_maxxfer == 0) { 703 bd->d_maxxfer = 1024 * 1024; 704 } 705 } 706 bd->d_ops = hdl->h_ops; 707 bd->d_private = hdl->h_private; 708 bd->d_blkshift = DEV_BSHIFT; /* 512 bytes, to start */ 709 710 if (bd->d_maxxfer % DEV_BSIZE) { 711 cmn_err(CE_WARN, "%s: maximum transfer misaligned!", name); 712 bd->d_maxxfer &= ~(DEV_BSIZE - 1); 713 } 714 if (bd->d_maxxfer < DEV_BSIZE) { 715 cmn_err(CE_WARN, "%s: maximum transfer size too small!", name); 716 ddi_soft_state_free(bd_state, inst); 717 return (DDI_FAILURE); 718 } 719 720 bd->d_dip = dip; 721 bd->d_handle = hdl; 722 hdl->h_bd = bd; 723 ddi_set_driver_private(dip, bd); 724 725 mutex_init(&bd->d_ksmutex, NULL, MUTEX_DRIVER, NULL); 726 mutex_init(&bd->d_ocmutex, NULL, MUTEX_DRIVER, NULL); 727 mutex_init(&bd->d_statemutex, NULL, MUTEX_DRIVER, NULL); 728 cv_init(&bd->d_statecv, NULL, CV_DRIVER, NULL); 729 mutex_init(&bd->d_dle_mutex, NULL, MUTEX_DRIVER, NULL); 730 bd->d_dle_state = 0; 731 732 bd->d_cache = kmem_cache_create(kcache, sizeof (bd_xfer_impl_t), 8, 733 bd_xfer_ctor, bd_xfer_dtor, NULL, bd, NULL, 0); 734 735 bd->d_ksp = kstat_create(ddi_driver_name(dip), inst, NULL, "disk", 736 KSTAT_TYPE_IO, 1, KSTAT_FLAG_PERSISTENT); 737 if (bd->d_ksp != NULL) { 738 bd->d_ksp->ks_lock = &bd->d_ksmutex; 739 kstat_install(bd->d_ksp); 740 bd->d_kiop = bd->d_ksp->ks_data; 741 } else { 742 /* 743 * Even if we cannot create the kstat, we create a 744 * scratch kstat. The reason for this is to ensure 745 * that we can update the kstat all of the time, 746 * without adding an extra branch instruction. 747 */ 748 bd->d_kiop = kmem_zalloc(sizeof (kstat_io_t), KM_SLEEP); 749 } 750 751 cmlb_alloc_handle(&bd->d_cmlbh); 752 753 bd->d_state = DKIO_NONE; 754 755 bzero(&drive, sizeof (drive)); 756 /* 757 * Default to one queue, and no restrictions on free space requests 758 * (if driver provides method) parent driver can override. 759 */ 760 drive.d_qcount = 1; 761 drive.d_free_align = 1; 762 bd->d_ops.o_drive_info(bd->d_private, &drive); 763 764 /* 765 * Several checks to make sure o_drive_info() didn't return bad 766 * values: 767 * 768 * There must be at least one queue 769 */ 770 if (drive.d_qcount == 0) 771 goto fail_drive_info; 772 773 /* FREE/UNMAP/TRIM alignment needs to be at least 1 block */ 774 if (drive.d_free_align == 0) 775 goto fail_drive_info; 776 777 /* 778 * If d_max_free_blks is not unlimited (not 0), then we cannot allow 779 * an unlimited segment size. It is however permissible to not impose 780 * a limit on the total number of blocks freed while limiting the 781 * amount allowed in an individual segment. 782 */ 783 if ((drive.d_max_free_blks > 0 && drive.d_max_free_seg_blks == 0)) 784 goto fail_drive_info; 785 786 /* 787 * If a limit is set on d_max_free_blks (by the above check, we know 788 * if there's a limit on d_max_free_blks, d_max_free_seg_blks cannot 789 * be unlimited), it cannot be smaller than the limit on an individual 790 * segment. 791 */ 792 if ((drive.d_max_free_blks > 0 && 793 drive.d_max_free_seg_blks > drive.d_max_free_blks)) { 794 goto fail_drive_info; 795 } 796 797 bd->d_qcount = drive.d_qcount; 798 bd->d_removable = drive.d_removable; 799 bd->d_hotpluggable = drive.d_hotpluggable; 800 801 if (drive.d_maxxfer && drive.d_maxxfer < bd->d_maxxfer) 802 bd->d_maxxfer = drive.d_maxxfer; 803 804 bd->d_free_align = drive.d_free_align; 805 bd->d_max_free_seg = drive.d_max_free_seg; 806 bd->d_max_free_blks = drive.d_max_free_blks; 807 bd->d_max_free_seg_blks = drive.d_max_free_seg_blks; 808 809 bd_create_inquiry_props(dip, &drive); 810 bd_create_errstats(bd, inst, &drive); 811 bd_update_state(bd); 812 813 bd->d_queues = kmem_alloc(sizeof (*bd->d_queues) * bd->d_qcount, 814 KM_SLEEP); 815 for (i = 0; i < bd->d_qcount; i++) { 816 bd_queue_t *bq = &bd->d_queues[i]; 817 818 bq->q_qsize = drive.d_qsize; 819 bq->q_qactive = 0; 820 mutex_init(&bq->q_iomutex, NULL, MUTEX_DRIVER, NULL); 821 822 list_create(&bq->q_waitq, sizeof (bd_xfer_impl_t), 823 offsetof(struct bd_xfer_impl, i_linkage)); 824 list_create(&bq->q_runq, sizeof (bd_xfer_impl_t), 825 offsetof(struct bd_xfer_impl, i_linkage)); 826 } 827 828 rv = cmlb_attach(dip, &bd_tg_ops, DTYPE_DIRECT, 829 bd->d_removable, bd->d_hotpluggable, 830 /*LINTED: E_BAD_PTR_CAST_ALIGN*/ 831 *(uint64_t *)drive.d_eui64 != 0 ? DDI_NT_BLOCK_BLKDEV : 832 drive.d_lun >= 0 ? DDI_NT_BLOCK_CHAN : DDI_NT_BLOCK, 833 CMLB_FAKE_LABEL_ONE_PARTITION, bd->d_cmlbh, 0); 834 if (rv != 0) { 835 goto fail_cmlb_attach; 836 } 837 838 if (bd->d_ops.o_devid_init != NULL) { 839 rv = bd->d_ops.o_devid_init(bd->d_private, dip, &bd->d_devid); 840 if (rv == DDI_SUCCESS) { 841 if (ddi_devid_register(dip, bd->d_devid) != 842 DDI_SUCCESS) { 843 cmn_err(CE_WARN, 844 "%s: unable to register devid", name); 845 } 846 } 847 } 848 849 /* 850 * Add a zero-length attribute to tell the world we support 851 * kernel ioctls (for layered drivers). Also set up properties 852 * used by HAL to identify removable media. 853 */ 854 (void) ddi_prop_create(DDI_DEV_T_NONE, dip, DDI_PROP_CANSLEEP, 855 DDI_KERNEL_IOCTL, NULL, 0); 856 if (bd->d_removable) { 857 (void) ddi_prop_create(DDI_DEV_T_NONE, dip, DDI_PROP_CANSLEEP, 858 "removable-media", NULL, 0); 859 } 860 if (bd->d_hotpluggable) { 861 (void) ddi_prop_create(DDI_DEV_T_NONE, dip, DDI_PROP_CANSLEEP, 862 "hotpluggable", NULL, 0); 863 } 864 865 ddi_report_dev(dip); 866 867 return (DDI_SUCCESS); 868 869 fail_cmlb_attach: 870 bd_queues_free(bd); 871 bd_destroy_errstats(bd); 872 873 fail_drive_info: 874 cmlb_free_handle(&bd->d_cmlbh); 875 876 if (bd->d_ksp != NULL) { 877 kstat_delete(bd->d_ksp); 878 bd->d_ksp = NULL; 879 } else { 880 kmem_free(bd->d_kiop, sizeof (kstat_io_t)); 881 } 882 883 kmem_cache_destroy(bd->d_cache); 884 cv_destroy(&bd->d_statecv); 885 mutex_destroy(&bd->d_statemutex); 886 mutex_destroy(&bd->d_ocmutex); 887 mutex_destroy(&bd->d_ksmutex); 888 mutex_destroy(&bd->d_dle_mutex); 889 ddi_soft_state_free(bd_state, inst); 890 return (DDI_FAILURE); 891 } 892 893 static int 894 bd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 895 { 896 bd_t *bd; 897 898 bd = ddi_get_driver_private(dip); 899 900 switch (cmd) { 901 case DDI_DETACH: 902 break; 903 case DDI_SUSPEND: 904 /* We don't suspend, but our parent does */ 905 return (DDI_SUCCESS); 906 default: 907 return (DDI_FAILURE); 908 } 909 910 if (bd->d_ksp != NULL) { 911 kstat_delete(bd->d_ksp); 912 bd->d_ksp = NULL; 913 } else { 914 kmem_free(bd->d_kiop, sizeof (kstat_io_t)); 915 } 916 917 bd_destroy_errstats(bd); 918 cmlb_detach(bd->d_cmlbh, 0); 919 cmlb_free_handle(&bd->d_cmlbh); 920 if (bd->d_devid) 921 ddi_devid_free(bd->d_devid); 922 kmem_cache_destroy(bd->d_cache); 923 mutex_destroy(&bd->d_ksmutex); 924 mutex_destroy(&bd->d_ocmutex); 925 mutex_destroy(&bd->d_statemutex); 926 cv_destroy(&bd->d_statecv); 927 mutex_destroy(&bd->d_dle_mutex); 928 bd_queues_free(bd); 929 ddi_soft_state_free(bd_state, ddi_get_instance(dip)); 930 return (DDI_SUCCESS); 931 } 932 933 static int 934 bd_xfer_ctor(void *buf, void *arg, int kmflag) 935 { 936 bd_xfer_impl_t *xi; 937 bd_t *bd = arg; 938 int (*dcb)(caddr_t); 939 940 if (kmflag == KM_PUSHPAGE || kmflag == KM_SLEEP) { 941 dcb = DDI_DMA_SLEEP; 942 } else { 943 dcb = DDI_DMA_DONTWAIT; 944 } 945 946 xi = buf; 947 bzero(xi, sizeof (*xi)); 948 xi->i_bd = bd; 949 950 if (bd->d_use_dma) { 951 if (ddi_dma_alloc_handle(bd->d_dip, &bd->d_dma, dcb, NULL, 952 &xi->i_dmah) != DDI_SUCCESS) { 953 return (-1); 954 } 955 } 956 957 return (0); 958 } 959 960 static void 961 bd_xfer_dtor(void *buf, void *arg) 962 { 963 bd_xfer_impl_t *xi = buf; 964 965 _NOTE(ARGUNUSED(arg)); 966 967 if (xi->i_dmah) 968 ddi_dma_free_handle(&xi->i_dmah); 969 xi->i_dmah = NULL; 970 } 971 972 static bd_xfer_impl_t * 973 bd_xfer_alloc(bd_t *bd, struct buf *bp, int (*func)(void *, bd_xfer_t *), 974 int kmflag) 975 { 976 bd_xfer_impl_t *xi; 977 int rv = 0; 978 int status; 979 unsigned dir; 980 int (*cb)(caddr_t); 981 size_t len; 982 uint32_t shift; 983 984 if (kmflag == KM_SLEEP) { 985 cb = DDI_DMA_SLEEP; 986 } else { 987 cb = DDI_DMA_DONTWAIT; 988 } 989 990 xi = kmem_cache_alloc(bd->d_cache, kmflag); 991 if (xi == NULL) { 992 bioerror(bp, ENOMEM); 993 return (NULL); 994 } 995 996 ASSERT(bp); 997 998 xi->i_bp = bp; 999 xi->i_func = func; 1000 xi->i_blkno = bp->b_lblkno >> (bd->d_blkshift - DEV_BSHIFT); 1001 1002 if (bp->b_bcount == 0) { 1003 xi->i_len = 0; 1004 xi->i_nblks = 0; 1005 xi->i_kaddr = NULL; 1006 xi->i_resid = 0; 1007 xi->i_num_win = 0; 1008 goto done; 1009 } 1010 1011 if (bp->b_flags & B_READ) { 1012 dir = DDI_DMA_READ; 1013 xi->i_func = bd->d_ops.o_read; 1014 } else { 1015 dir = DDI_DMA_WRITE; 1016 xi->i_func = bd->d_ops.o_write; 1017 } 1018 1019 shift = bd->d_blkshift; 1020 xi->i_blkshift = shift; 1021 1022 if (!bd->d_use_dma) { 1023 bp_mapin(bp); 1024 rv = 0; 1025 xi->i_offset = 0; 1026 xi->i_num_win = 1027 (bp->b_bcount + (bd->d_maxxfer - 1)) / bd->d_maxxfer; 1028 xi->i_cur_win = 0; 1029 xi->i_len = min(bp->b_bcount, bd->d_maxxfer); 1030 xi->i_nblks = xi->i_len >> shift; 1031 xi->i_kaddr = bp->b_un.b_addr; 1032 xi->i_resid = bp->b_bcount; 1033 } else { 1034 1035 /* 1036 * We have to use consistent DMA if the address is misaligned. 1037 */ 1038 if (((bp->b_flags & (B_PAGEIO | B_REMAPPED)) != B_PAGEIO) && 1039 ((uintptr_t)bp->b_un.b_addr & 0x7)) { 1040 dir |= DDI_DMA_CONSISTENT | DDI_DMA_PARTIAL; 1041 } else { 1042 dir |= DDI_DMA_STREAMING | DDI_DMA_PARTIAL; 1043 } 1044 1045 status = ddi_dma_buf_bind_handle(xi->i_dmah, bp, dir, cb, 1046 NULL, &xi->i_dmac, &xi->i_ndmac); 1047 switch (status) { 1048 case DDI_DMA_MAPPED: 1049 xi->i_num_win = 1; 1050 xi->i_cur_win = 0; 1051 xi->i_offset = 0; 1052 xi->i_len = bp->b_bcount; 1053 xi->i_nblks = xi->i_len >> shift; 1054 xi->i_resid = bp->b_bcount; 1055 rv = 0; 1056 break; 1057 case DDI_DMA_PARTIAL_MAP: 1058 xi->i_cur_win = 0; 1059 1060 if ((ddi_dma_numwin(xi->i_dmah, &xi->i_num_win) != 1061 DDI_SUCCESS) || 1062 (ddi_dma_getwin(xi->i_dmah, 0, &xi->i_offset, 1063 &len, &xi->i_dmac, &xi->i_ndmac) != 1064 DDI_SUCCESS) || 1065 (P2PHASE(len, (1U << shift)) != 0)) { 1066 (void) ddi_dma_unbind_handle(xi->i_dmah); 1067 rv = EFAULT; 1068 goto done; 1069 } 1070 xi->i_len = len; 1071 xi->i_nblks = xi->i_len >> shift; 1072 xi->i_resid = bp->b_bcount; 1073 rv = 0; 1074 break; 1075 case DDI_DMA_NORESOURCES: 1076 rv = EAGAIN; 1077 goto done; 1078 case DDI_DMA_TOOBIG: 1079 rv = EINVAL; 1080 goto done; 1081 case DDI_DMA_NOMAPPING: 1082 case DDI_DMA_INUSE: 1083 default: 1084 rv = EFAULT; 1085 goto done; 1086 } 1087 } 1088 1089 done: 1090 if (rv != 0) { 1091 kmem_cache_free(bd->d_cache, xi); 1092 bioerror(bp, rv); 1093 return (NULL); 1094 } 1095 1096 return (xi); 1097 } 1098 1099 static void 1100 bd_xfer_free(bd_xfer_impl_t *xi) 1101 { 1102 if (xi->i_dmah) { 1103 (void) ddi_dma_unbind_handle(xi->i_dmah); 1104 } 1105 if (xi->i_dfl != NULL) { 1106 dfl_free((dkioc_free_list_t *)xi->i_dfl); 1107 xi->i_dfl = NULL; 1108 } 1109 kmem_cache_free(xi->i_bd->d_cache, xi); 1110 } 1111 1112 static int 1113 bd_open(dev_t *devp, int flag, int otyp, cred_t *credp) 1114 { 1115 dev_t dev = *devp; 1116 bd_t *bd; 1117 minor_t part; 1118 minor_t inst; 1119 uint64_t mask; 1120 boolean_t ndelay; 1121 int rv; 1122 diskaddr_t nblks; 1123 diskaddr_t lba; 1124 1125 _NOTE(ARGUNUSED(credp)); 1126 1127 part = BDPART(dev); 1128 inst = BDINST(dev); 1129 1130 if (otyp >= OTYPCNT) 1131 return (EINVAL); 1132 1133 ndelay = (flag & (FNDELAY | FNONBLOCK)) ? B_TRUE : B_FALSE; 1134 1135 /* 1136 * Block any DR events from changing the set of registered 1137 * devices while we function. 1138 */ 1139 rw_enter(&bd_lock, RW_READER); 1140 if ((bd = ddi_get_soft_state(bd_state, inst)) == NULL) { 1141 rw_exit(&bd_lock); 1142 return (ENXIO); 1143 } 1144 1145 mutex_enter(&bd->d_ocmutex); 1146 1147 ASSERT(part < 64); 1148 mask = (1U << part); 1149 1150 bd_update_state(bd); 1151 1152 if (cmlb_validate(bd->d_cmlbh, 0, 0) != 0) { 1153 1154 /* non-blocking opens are allowed to succeed */ 1155 if (!ndelay) { 1156 rv = ENXIO; 1157 goto done; 1158 } 1159 } else if (cmlb_partinfo(bd->d_cmlbh, part, &nblks, &lba, 1160 NULL, NULL, 0) == 0) { 1161 1162 /* 1163 * We read the partinfo, verify valid ranges. If the 1164 * partition is invalid, and we aren't blocking or 1165 * doing a raw access, then fail. (Non-blocking and 1166 * raw accesses can still succeed to allow a disk with 1167 * bad partition data to opened by format and fdisk.) 1168 */ 1169 if ((!nblks) && ((!ndelay) || (otyp != OTYP_CHR))) { 1170 rv = ENXIO; 1171 goto done; 1172 } 1173 } else if (!ndelay) { 1174 /* 1175 * cmlb_partinfo failed -- invalid partition or no 1176 * disk label. 1177 */ 1178 rv = ENXIO; 1179 goto done; 1180 } 1181 1182 if ((flag & FWRITE) && bd->d_rdonly) { 1183 rv = EROFS; 1184 goto done; 1185 } 1186 1187 if ((bd->d_open_excl) & (mask)) { 1188 rv = EBUSY; 1189 goto done; 1190 } 1191 if (flag & FEXCL) { 1192 if (bd->d_open_lyr[part]) { 1193 rv = EBUSY; 1194 goto done; 1195 } 1196 for (int i = 0; i < OTYP_LYR; i++) { 1197 if (bd->d_open_reg[i] & mask) { 1198 rv = EBUSY; 1199 goto done; 1200 } 1201 } 1202 } 1203 1204 if (otyp == OTYP_LYR) { 1205 bd->d_open_lyr[part]++; 1206 } else { 1207 bd->d_open_reg[otyp] |= mask; 1208 } 1209 if (flag & FEXCL) { 1210 bd->d_open_excl |= mask; 1211 } 1212 1213 rv = 0; 1214 done: 1215 mutex_exit(&bd->d_ocmutex); 1216 rw_exit(&bd_lock); 1217 1218 return (rv); 1219 } 1220 1221 static int 1222 bd_close(dev_t dev, int flag, int otyp, cred_t *credp) 1223 { 1224 bd_t *bd; 1225 minor_t inst; 1226 minor_t part; 1227 uint64_t mask; 1228 boolean_t last = B_TRUE; 1229 1230 _NOTE(ARGUNUSED(flag)); 1231 _NOTE(ARGUNUSED(credp)); 1232 1233 part = BDPART(dev); 1234 inst = BDINST(dev); 1235 1236 ASSERT(part < 64); 1237 mask = (1U << part); 1238 1239 rw_enter(&bd_lock, RW_READER); 1240 1241 if ((bd = ddi_get_soft_state(bd_state, inst)) == NULL) { 1242 rw_exit(&bd_lock); 1243 return (ENXIO); 1244 } 1245 1246 mutex_enter(&bd->d_ocmutex); 1247 if (bd->d_open_excl & mask) { 1248 bd->d_open_excl &= ~mask; 1249 } 1250 if (otyp == OTYP_LYR) { 1251 bd->d_open_lyr[part]--; 1252 } else { 1253 bd->d_open_reg[otyp] &= ~mask; 1254 } 1255 for (int i = 0; i < 64; i++) { 1256 if (bd->d_open_lyr[part]) { 1257 last = B_FALSE; 1258 } 1259 } 1260 for (int i = 0; last && (i < OTYP_LYR); i++) { 1261 if (bd->d_open_reg[i]) { 1262 last = B_FALSE; 1263 } 1264 } 1265 mutex_exit(&bd->d_ocmutex); 1266 1267 if (last) { 1268 cmlb_invalidate(bd->d_cmlbh, 0); 1269 } 1270 rw_exit(&bd_lock); 1271 1272 return (0); 1273 } 1274 1275 static int 1276 bd_dump(dev_t dev, caddr_t caddr, daddr_t blkno, int nblk) 1277 { 1278 minor_t inst; 1279 minor_t part; 1280 diskaddr_t pstart; 1281 diskaddr_t psize; 1282 bd_t *bd; 1283 bd_xfer_impl_t *xi; 1284 buf_t *bp; 1285 int rv; 1286 uint32_t shift; 1287 daddr_t d_blkno; 1288 int d_nblk; 1289 1290 rw_enter(&bd_lock, RW_READER); 1291 1292 part = BDPART(dev); 1293 inst = BDINST(dev); 1294 1295 if ((bd = ddi_get_soft_state(bd_state, inst)) == NULL) { 1296 rw_exit(&bd_lock); 1297 return (ENXIO); 1298 } 1299 shift = bd->d_blkshift; 1300 d_blkno = blkno >> (shift - DEV_BSHIFT); 1301 d_nblk = nblk >> (shift - DEV_BSHIFT); 1302 /* 1303 * do cmlb, but do it synchronously unless we already have the 1304 * partition (which we probably should.) 1305 */ 1306 if (cmlb_partinfo(bd->d_cmlbh, part, &psize, &pstart, NULL, NULL, 1307 (void *)1)) { 1308 rw_exit(&bd_lock); 1309 return (ENXIO); 1310 } 1311 1312 if ((d_blkno + d_nblk) > psize) { 1313 rw_exit(&bd_lock); 1314 return (EINVAL); 1315 } 1316 bp = getrbuf(KM_NOSLEEP); 1317 if (bp == NULL) { 1318 rw_exit(&bd_lock); 1319 return (ENOMEM); 1320 } 1321 1322 bp->b_bcount = nblk << DEV_BSHIFT; 1323 bp->b_resid = bp->b_bcount; 1324 bp->b_lblkno = blkno; 1325 bp->b_un.b_addr = caddr; 1326 1327 xi = bd_xfer_alloc(bd, bp, bd->d_ops.o_write, KM_NOSLEEP); 1328 if (xi == NULL) { 1329 rw_exit(&bd_lock); 1330 freerbuf(bp); 1331 return (ENOMEM); 1332 } 1333 xi->i_blkno = d_blkno + pstart; 1334 xi->i_flags = BD_XFER_POLL; 1335 bd_submit(bd, xi); 1336 rw_exit(&bd_lock); 1337 1338 /* 1339 * Generally, we should have run this entirely synchronously 1340 * at this point and the biowait call should be a no-op. If 1341 * it didn't happen this way, it's a bug in the underlying 1342 * driver not honoring BD_XFER_POLL. 1343 */ 1344 (void) biowait(bp); 1345 rv = geterror(bp); 1346 freerbuf(bp); 1347 return (rv); 1348 } 1349 1350 void 1351 bd_minphys(struct buf *bp) 1352 { 1353 minor_t inst; 1354 bd_t *bd; 1355 inst = BDINST(bp->b_edev); 1356 1357 bd = ddi_get_soft_state(bd_state, inst); 1358 1359 /* 1360 * In a non-debug kernel, bd_strategy will catch !bd as 1361 * well, and will fail nicely. 1362 */ 1363 ASSERT(bd); 1364 1365 if (bp->b_bcount > bd->d_maxxfer) 1366 bp->b_bcount = bd->d_maxxfer; 1367 } 1368 1369 static int 1370 bd_check_uio(dev_t dev, struct uio *uio) 1371 { 1372 bd_t *bd; 1373 uint32_t shift; 1374 1375 if ((bd = ddi_get_soft_state(bd_state, BDINST(dev))) == NULL) { 1376 return (ENXIO); 1377 } 1378 1379 shift = bd->d_blkshift; 1380 if ((P2PHASE(uio->uio_loffset, (1U << shift)) != 0) || 1381 (P2PHASE(uio->uio_iov->iov_len, (1U << shift)) != 0)) { 1382 return (EINVAL); 1383 } 1384 1385 return (0); 1386 } 1387 1388 static int 1389 bd_read(dev_t dev, struct uio *uio, cred_t *credp) 1390 { 1391 _NOTE(ARGUNUSED(credp)); 1392 int ret = bd_check_uio(dev, uio); 1393 if (ret != 0) { 1394 return (ret); 1395 } 1396 return (physio(bd_strategy, NULL, dev, B_READ, bd_minphys, uio)); 1397 } 1398 1399 static int 1400 bd_write(dev_t dev, struct uio *uio, cred_t *credp) 1401 { 1402 _NOTE(ARGUNUSED(credp)); 1403 int ret = bd_check_uio(dev, uio); 1404 if (ret != 0) { 1405 return (ret); 1406 } 1407 return (physio(bd_strategy, NULL, dev, B_WRITE, bd_minphys, uio)); 1408 } 1409 1410 static int 1411 bd_aread(dev_t dev, struct aio_req *aio, cred_t *credp) 1412 { 1413 _NOTE(ARGUNUSED(credp)); 1414 int ret = bd_check_uio(dev, aio->aio_uio); 1415 if (ret != 0) { 1416 return (ret); 1417 } 1418 return (aphysio(bd_strategy, anocancel, dev, B_READ, bd_minphys, aio)); 1419 } 1420 1421 static int 1422 bd_awrite(dev_t dev, struct aio_req *aio, cred_t *credp) 1423 { 1424 _NOTE(ARGUNUSED(credp)); 1425 int ret = bd_check_uio(dev, aio->aio_uio); 1426 if (ret != 0) { 1427 return (ret); 1428 } 1429 return (aphysio(bd_strategy, anocancel, dev, B_WRITE, bd_minphys, aio)); 1430 } 1431 1432 static int 1433 bd_strategy(struct buf *bp) 1434 { 1435 minor_t inst; 1436 minor_t part; 1437 bd_t *bd; 1438 diskaddr_t p_lba; 1439 diskaddr_t p_nblks; 1440 diskaddr_t b_nblks; 1441 bd_xfer_impl_t *xi; 1442 uint32_t shift; 1443 int (*func)(void *, bd_xfer_t *); 1444 diskaddr_t lblkno; 1445 1446 part = BDPART(bp->b_edev); 1447 inst = BDINST(bp->b_edev); 1448 1449 ASSERT(bp); 1450 1451 bp->b_resid = bp->b_bcount; 1452 1453 if ((bd = ddi_get_soft_state(bd_state, inst)) == NULL) { 1454 bioerror(bp, ENXIO); 1455 biodone(bp); 1456 return (0); 1457 } 1458 1459 if (cmlb_partinfo(bd->d_cmlbh, part, &p_nblks, &p_lba, 1460 NULL, NULL, 0)) { 1461 bioerror(bp, ENXIO); 1462 biodone(bp); 1463 return (0); 1464 } 1465 1466 shift = bd->d_blkshift; 1467 lblkno = bp->b_lblkno >> (shift - DEV_BSHIFT); 1468 if ((P2PHASE(bp->b_lblkno, (1U << (shift - DEV_BSHIFT))) != 0) || 1469 (P2PHASE(bp->b_bcount, (1U << shift)) != 0) || 1470 (lblkno > p_nblks)) { 1471 bioerror(bp, EINVAL); 1472 biodone(bp); 1473 return (0); 1474 } 1475 b_nblks = bp->b_bcount >> shift; 1476 if ((lblkno == p_nblks) || (bp->b_bcount == 0)) { 1477 biodone(bp); 1478 return (0); 1479 } 1480 1481 if ((b_nblks + lblkno) > p_nblks) { 1482 bp->b_resid = ((lblkno + b_nblks - p_nblks) << shift); 1483 bp->b_bcount -= bp->b_resid; 1484 } else { 1485 bp->b_resid = 0; 1486 } 1487 func = (bp->b_flags & B_READ) ? bd->d_ops.o_read : bd->d_ops.o_write; 1488 1489 xi = bd_xfer_alloc(bd, bp, func, KM_NOSLEEP); 1490 if (xi == NULL) { 1491 xi = bd_xfer_alloc(bd, bp, func, KM_PUSHPAGE); 1492 } 1493 if (xi == NULL) { 1494 /* bd_request_alloc will have done bioerror */ 1495 biodone(bp); 1496 return (0); 1497 } 1498 xi->i_blkno = lblkno + p_lba; 1499 1500 bd_submit(bd, xi); 1501 1502 return (0); 1503 } 1504 1505 static int 1506 bd_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *credp, int *rvalp) 1507 { 1508 minor_t inst; 1509 uint16_t part; 1510 bd_t *bd; 1511 void *ptr = (void *)arg; 1512 int rv; 1513 1514 part = BDPART(dev); 1515 inst = BDINST(dev); 1516 1517 if ((bd = ddi_get_soft_state(bd_state, inst)) == NULL) { 1518 return (ENXIO); 1519 } 1520 1521 rv = cmlb_ioctl(bd->d_cmlbh, dev, cmd, arg, flag, credp, rvalp, 0); 1522 if (rv != ENOTTY) 1523 return (rv); 1524 1525 if (rvalp != NULL) { 1526 /* the return value of the ioctl is 0 by default */ 1527 *rvalp = 0; 1528 } 1529 1530 switch (cmd) { 1531 case DKIOCGMEDIAINFO: { 1532 struct dk_minfo minfo; 1533 1534 /* make sure our state information is current */ 1535 bd_update_state(bd); 1536 bzero(&minfo, sizeof (minfo)); 1537 minfo.dki_media_type = DK_FIXED_DISK; 1538 minfo.dki_lbsize = (1U << bd->d_blkshift); 1539 minfo.dki_capacity = bd->d_numblks; 1540 if (ddi_copyout(&minfo, ptr, sizeof (minfo), flag)) { 1541 return (EFAULT); 1542 } 1543 return (0); 1544 } 1545 case DKIOCGMEDIAINFOEXT: { 1546 struct dk_minfo_ext miext; 1547 size_t len; 1548 1549 /* make sure our state information is current */ 1550 bd_update_state(bd); 1551 bzero(&miext, sizeof (miext)); 1552 miext.dki_media_type = DK_FIXED_DISK; 1553 miext.dki_lbsize = (1U << bd->d_blkshift); 1554 miext.dki_pbsize = (1U << bd->d_pblkshift); 1555 miext.dki_capacity = bd->d_numblks; 1556 1557 switch (ddi_model_convert_from(flag & FMODELS)) { 1558 case DDI_MODEL_ILP32: 1559 len = sizeof (struct dk_minfo_ext32); 1560 break; 1561 default: 1562 len = sizeof (struct dk_minfo_ext); 1563 break; 1564 } 1565 1566 if (ddi_copyout(&miext, ptr, len, flag)) { 1567 return (EFAULT); 1568 } 1569 return (0); 1570 } 1571 case DKIOCINFO: { 1572 struct dk_cinfo cinfo; 1573 bzero(&cinfo, sizeof (cinfo)); 1574 cinfo.dki_ctype = DKC_BLKDEV; 1575 cinfo.dki_cnum = ddi_get_instance(ddi_get_parent(bd->d_dip)); 1576 (void) snprintf(cinfo.dki_cname, sizeof (cinfo.dki_cname), 1577 "%s", ddi_driver_name(ddi_get_parent(bd->d_dip))); 1578 (void) snprintf(cinfo.dki_dname, sizeof (cinfo.dki_dname), 1579 "%s", ddi_driver_name(bd->d_dip)); 1580 cinfo.dki_unit = inst; 1581 cinfo.dki_flags = DKI_FMTVOL; 1582 cinfo.dki_partition = part; 1583 cinfo.dki_maxtransfer = bd->d_maxxfer / DEV_BSIZE; 1584 cinfo.dki_addr = 0; 1585 cinfo.dki_slave = 0; 1586 cinfo.dki_space = 0; 1587 cinfo.dki_prio = 0; 1588 cinfo.dki_vec = 0; 1589 if (ddi_copyout(&cinfo, ptr, sizeof (cinfo), flag)) { 1590 return (EFAULT); 1591 } 1592 return (0); 1593 } 1594 case DKIOCREMOVABLE: { 1595 int i; 1596 i = bd->d_removable ? 1 : 0; 1597 if (ddi_copyout(&i, ptr, sizeof (i), flag)) { 1598 return (EFAULT); 1599 } 1600 return (0); 1601 } 1602 case DKIOCHOTPLUGGABLE: { 1603 int i; 1604 i = bd->d_hotpluggable ? 1 : 0; 1605 if (ddi_copyout(&i, ptr, sizeof (i), flag)) { 1606 return (EFAULT); 1607 } 1608 return (0); 1609 } 1610 case DKIOCREADONLY: { 1611 int i; 1612 i = bd->d_rdonly ? 1 : 0; 1613 if (ddi_copyout(&i, ptr, sizeof (i), flag)) { 1614 return (EFAULT); 1615 } 1616 return (0); 1617 } 1618 case DKIOCSOLIDSTATE: { 1619 int i; 1620 i = bd->d_ssd ? 1 : 0; 1621 if (ddi_copyout(&i, ptr, sizeof (i), flag)) { 1622 return (EFAULT); 1623 } 1624 return (0); 1625 } 1626 case DKIOCSTATE: { 1627 enum dkio_state state; 1628 if (ddi_copyin(ptr, &state, sizeof (state), flag)) { 1629 return (EFAULT); 1630 } 1631 if ((rv = bd_check_state(bd, &state)) != 0) { 1632 return (rv); 1633 } 1634 if (ddi_copyout(&state, ptr, sizeof (state), flag)) { 1635 return (EFAULT); 1636 } 1637 return (0); 1638 } 1639 case DKIOCFLUSHWRITECACHE: { 1640 struct dk_callback *dkc = NULL; 1641 1642 if (flag & FKIOCTL) 1643 dkc = (void *)arg; 1644 1645 rv = bd_flush_write_cache(bd, dkc); 1646 return (rv); 1647 } 1648 case DKIOCFREE: { 1649 dkioc_free_list_t *dfl = NULL; 1650 1651 /* 1652 * Check free space support early to avoid copyin/allocation 1653 * when unnecessary. 1654 */ 1655 if (!CAN_FREESPACE(bd)) 1656 return (ENOTSUP); 1657 1658 rv = dfl_copyin(ptr, &dfl, flag, KM_SLEEP); 1659 if (rv != 0) 1660 return (rv); 1661 1662 /* 1663 * bd_free_space() consumes 'dfl'. bd_free_space() will 1664 * call dfl_iter() which will normally try to pass dfl through 1665 * to bd_free_space_cb() which attaches dfl to the bd_xfer_t 1666 * that is then queued for the underlying driver. Once the 1667 * driver processes the request, the bd_xfer_t instance is 1668 * disposed of, including any attached dkioc_free_list_t. 1669 * 1670 * If dfl cannot be processed by the underlying driver due to 1671 * size or alignment requirements of the driver, dfl_iter() 1672 * will replace dfl with one or more new dkioc_free_list_t 1673 * instances with the correct alignment and sizes for the driver 1674 * (and free the original dkioc_free_list_t). 1675 */ 1676 rv = bd_free_space(dev, bd, dfl); 1677 return (rv); 1678 } 1679 1680 case DKIOC_CANFREE: { 1681 boolean_t supported = CAN_FREESPACE(bd); 1682 1683 if (ddi_copyout(&supported, (void *)arg, sizeof (supported), 1684 flag) != 0) { 1685 return (EFAULT); 1686 } 1687 1688 return (0); 1689 } 1690 1691 default: 1692 break; 1693 1694 } 1695 return (ENOTTY); 1696 } 1697 1698 static int 1699 bd_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int mod_flags, 1700 char *name, caddr_t valuep, int *lengthp) 1701 { 1702 bd_t *bd; 1703 1704 bd = ddi_get_soft_state(bd_state, ddi_get_instance(dip)); 1705 if (bd == NULL) 1706 return (ddi_prop_op(dev, dip, prop_op, mod_flags, 1707 name, valuep, lengthp)); 1708 1709 return (cmlb_prop_op(bd->d_cmlbh, dev, dip, prop_op, mod_flags, name, 1710 valuep, lengthp, BDPART(dev), 0)); 1711 } 1712 1713 1714 static int 1715 bd_tg_rdwr(dev_info_t *dip, uchar_t cmd, void *bufaddr, diskaddr_t start, 1716 size_t length, void *tg_cookie) 1717 { 1718 bd_t *bd; 1719 buf_t *bp; 1720 bd_xfer_impl_t *xi; 1721 int rv; 1722 int (*func)(void *, bd_xfer_t *); 1723 int kmflag; 1724 1725 /* 1726 * If we are running in polled mode (such as during dump(9e) 1727 * execution), then we cannot sleep for kernel allocations. 1728 */ 1729 kmflag = tg_cookie ? KM_NOSLEEP : KM_SLEEP; 1730 1731 bd = ddi_get_soft_state(bd_state, ddi_get_instance(dip)); 1732 1733 if (P2PHASE(length, (1U << bd->d_blkshift)) != 0) { 1734 /* We can only transfer whole blocks at a time! */ 1735 return (EINVAL); 1736 } 1737 1738 if ((bp = getrbuf(kmflag)) == NULL) { 1739 return (ENOMEM); 1740 } 1741 1742 switch (cmd) { 1743 case TG_READ: 1744 bp->b_flags = B_READ; 1745 func = bd->d_ops.o_read; 1746 break; 1747 case TG_WRITE: 1748 bp->b_flags = B_WRITE; 1749 func = bd->d_ops.o_write; 1750 break; 1751 default: 1752 freerbuf(bp); 1753 return (EINVAL); 1754 } 1755 1756 bp->b_un.b_addr = bufaddr; 1757 bp->b_bcount = length; 1758 xi = bd_xfer_alloc(bd, bp, func, kmflag); 1759 if (xi == NULL) { 1760 rv = geterror(bp); 1761 freerbuf(bp); 1762 return (rv); 1763 } 1764 xi->i_flags = tg_cookie ? BD_XFER_POLL : 0; 1765 xi->i_blkno = start; 1766 bd_submit(bd, xi); 1767 (void) biowait(bp); 1768 rv = geterror(bp); 1769 freerbuf(bp); 1770 1771 return (rv); 1772 } 1773 1774 static int 1775 bd_tg_getinfo(dev_info_t *dip, int cmd, void *arg, void *tg_cookie) 1776 { 1777 bd_t *bd; 1778 1779 _NOTE(ARGUNUSED(tg_cookie)); 1780 bd = ddi_get_soft_state(bd_state, ddi_get_instance(dip)); 1781 1782 switch (cmd) { 1783 case TG_GETPHYGEOM: 1784 case TG_GETVIRTGEOM: 1785 /* 1786 * We don't have any "geometry" as such, let cmlb 1787 * fabricate something. 1788 */ 1789 return (ENOTTY); 1790 1791 case TG_GETCAPACITY: 1792 bd_update_state(bd); 1793 *(diskaddr_t *)arg = bd->d_numblks; 1794 return (0); 1795 1796 case TG_GETBLOCKSIZE: 1797 *(uint32_t *)arg = (1U << bd->d_blkshift); 1798 return (0); 1799 1800 case TG_GETATTR: 1801 /* 1802 * It turns out that cmlb really doesn't do much for 1803 * non-writable media, but lets make the information 1804 * available for it in case it does more in the 1805 * future. (The value is currently used for 1806 * triggering special behavior for CD-ROMs.) 1807 */ 1808 bd_update_state(bd); 1809 ((tg_attribute_t *)arg)->media_is_writable = 1810 bd->d_rdonly ? B_FALSE : B_TRUE; 1811 ((tg_attribute_t *)arg)->media_is_solid_state = bd->d_ssd; 1812 ((tg_attribute_t *)arg)->media_is_rotational = B_FALSE; 1813 return (0); 1814 1815 default: 1816 return (EINVAL); 1817 } 1818 } 1819 1820 1821 static void 1822 bd_sched(bd_t *bd, bd_queue_t *bq) 1823 { 1824 bd_xfer_impl_t *xi; 1825 struct buf *bp; 1826 int rv; 1827 1828 mutex_enter(&bq->q_iomutex); 1829 1830 while ((bq->q_qactive < bq->q_qsize) && 1831 ((xi = list_remove_head(&bq->q_waitq)) != NULL)) { 1832 mutex_enter(&bd->d_ksmutex); 1833 kstat_waitq_to_runq(bd->d_kiop); 1834 mutex_exit(&bd->d_ksmutex); 1835 1836 bq->q_qactive++; 1837 list_insert_tail(&bq->q_runq, xi); 1838 1839 /* 1840 * Submit the job to the driver. We drop the I/O mutex 1841 * so that we can deal with the case where the driver 1842 * completion routine calls back into us synchronously. 1843 */ 1844 1845 mutex_exit(&bq->q_iomutex); 1846 1847 rv = xi->i_func(bd->d_private, &xi->i_public); 1848 if (rv != 0) { 1849 bp = xi->i_bp; 1850 bioerror(bp, rv); 1851 biodone(bp); 1852 1853 atomic_inc_32(&bd->d_kerr->bd_transerrs.value.ui32); 1854 1855 mutex_enter(&bq->q_iomutex); 1856 1857 mutex_enter(&bd->d_ksmutex); 1858 kstat_runq_exit(bd->d_kiop); 1859 mutex_exit(&bd->d_ksmutex); 1860 1861 bq->q_qactive--; 1862 list_remove(&bq->q_runq, xi); 1863 bd_xfer_free(xi); 1864 } else { 1865 mutex_enter(&bq->q_iomutex); 1866 } 1867 } 1868 1869 mutex_exit(&bq->q_iomutex); 1870 } 1871 1872 static void 1873 bd_submit(bd_t *bd, bd_xfer_impl_t *xi) 1874 { 1875 uint64_t nv = atomic_inc_64_nv(&bd->d_io_counter); 1876 unsigned q = nv % bd->d_qcount; 1877 bd_queue_t *bq = &bd->d_queues[q]; 1878 1879 xi->i_bq = bq; 1880 xi->i_qnum = q; 1881 1882 mutex_enter(&bq->q_iomutex); 1883 1884 list_insert_tail(&bq->q_waitq, xi); 1885 1886 mutex_enter(&bd->d_ksmutex); 1887 kstat_waitq_enter(bd->d_kiop); 1888 mutex_exit(&bd->d_ksmutex); 1889 1890 mutex_exit(&bq->q_iomutex); 1891 1892 bd_sched(bd, bq); 1893 } 1894 1895 static void 1896 bd_runq_exit(bd_xfer_impl_t *xi, int err) 1897 { 1898 bd_t *bd = xi->i_bd; 1899 buf_t *bp = xi->i_bp; 1900 bd_queue_t *bq = xi->i_bq; 1901 1902 mutex_enter(&bq->q_iomutex); 1903 bq->q_qactive--; 1904 1905 mutex_enter(&bd->d_ksmutex); 1906 kstat_runq_exit(bd->d_kiop); 1907 mutex_exit(&bd->d_ksmutex); 1908 1909 list_remove(&bq->q_runq, xi); 1910 mutex_exit(&bq->q_iomutex); 1911 1912 if (err == 0) { 1913 if (bp->b_flags & B_READ) { 1914 atomic_inc_uint(&bd->d_kiop->reads); 1915 atomic_add_64((uint64_t *)&bd->d_kiop->nread, 1916 bp->b_bcount - xi->i_resid); 1917 } else { 1918 atomic_inc_uint(&bd->d_kiop->writes); 1919 atomic_add_64((uint64_t *)&bd->d_kiop->nwritten, 1920 bp->b_bcount - xi->i_resid); 1921 } 1922 } 1923 bd_sched(bd, bq); 1924 } 1925 1926 static void 1927 bd_dle_sysevent_task(void *arg) 1928 { 1929 nvlist_t *attr = NULL; 1930 char *path = NULL; 1931 bd_t *bd = arg; 1932 dev_info_t *dip = bd->d_dip; 1933 size_t n; 1934 1935 mutex_enter(&bd->d_dle_mutex); 1936 bd->d_dle_state &= ~BD_DLE_PENDING; 1937 bd->d_dle_state |= BD_DLE_RUNNING; 1938 mutex_exit(&bd->d_dle_mutex); 1939 1940 dev_err(dip, CE_NOTE, "!dynamic LUN expansion"); 1941 1942 if (nvlist_alloc(&attr, NV_UNIQUE_NAME_TYPE, KM_SLEEP) != 0) { 1943 mutex_enter(&bd->d_dle_mutex); 1944 bd->d_dle_state &= ~(BD_DLE_RUNNING|BD_DLE_PENDING); 1945 mutex_exit(&bd->d_dle_mutex); 1946 return; 1947 } 1948 1949 path = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 1950 1951 n = snprintf(path, MAXPATHLEN, "/devices"); 1952 (void) ddi_pathname(dip, path + n); 1953 n = strlen(path); 1954 n += snprintf(path + n, MAXPATHLEN - n, ":x"); 1955 1956 for (;;) { 1957 /* 1958 * On receipt of this event, the ZFS sysevent module will scan 1959 * active zpools for child vdevs matching this physical path. 1960 * In order to catch both whole disk pools and those with an 1961 * EFI boot partition, generate separate sysevents for minor 1962 * node 'a' and 'b'. (By comparison, io/scsi/targets/sd.c sends 1963 * events for just 'a') 1964 */ 1965 for (char c = 'a'; c < 'c'; c++) { 1966 path[n - 1] = c; 1967 1968 if (nvlist_add_string(attr, DEV_PHYS_PATH, path) != 0) 1969 break; 1970 1971 (void) ddi_log_sysevent(dip, DDI_VENDOR_SUNW, 1972 EC_DEV_STATUS, ESC_DEV_DLE, attr, NULL, DDI_SLEEP); 1973 } 1974 1975 mutex_enter(&bd->d_dle_mutex); 1976 if ((bd->d_dle_state & BD_DLE_PENDING) == 0) { 1977 bd->d_dle_state &= ~BD_DLE_RUNNING; 1978 mutex_exit(&bd->d_dle_mutex); 1979 break; 1980 } 1981 bd->d_dle_state &= ~BD_DLE_PENDING; 1982 mutex_exit(&bd->d_dle_mutex); 1983 } 1984 1985 nvlist_free(attr); 1986 kmem_free(path, MAXPATHLEN); 1987 } 1988 1989 static void 1990 bd_update_state(bd_t *bd) 1991 { 1992 enum dkio_state state = DKIO_INSERTED; 1993 boolean_t docmlb = B_FALSE; 1994 bd_media_t media; 1995 1996 bzero(&media, sizeof (media)); 1997 1998 mutex_enter(&bd->d_statemutex); 1999 if (bd->d_ops.o_media_info(bd->d_private, &media) != 0) { 2000 bd->d_numblks = 0; 2001 state = DKIO_EJECTED; 2002 goto done; 2003 } 2004 2005 if ((media.m_blksize < 512) || 2006 (!ISP2(media.m_blksize)) || 2007 (P2PHASE(bd->d_maxxfer, media.m_blksize))) { 2008 dev_err(bd->d_dip, CE_WARN, "Invalid media block size (%d)", 2009 media.m_blksize); 2010 /* 2011 * We can't use the media, treat it as not present. 2012 */ 2013 state = DKIO_EJECTED; 2014 bd->d_numblks = 0; 2015 goto done; 2016 } 2017 2018 if (((1U << bd->d_blkshift) != media.m_blksize) || 2019 (bd->d_numblks != media.m_nblks)) { 2020 /* Device size changed */ 2021 docmlb = B_TRUE; 2022 } 2023 2024 bd->d_blkshift = ddi_ffs(media.m_blksize) - 1; 2025 bd->d_pblkshift = bd->d_blkshift; 2026 bd->d_numblks = media.m_nblks; 2027 bd->d_rdonly = media.m_readonly; 2028 bd->d_ssd = media.m_solidstate; 2029 2030 /* 2031 * Only use the supplied physical block size if it is non-zero, 2032 * greater or equal to the block size, and a power of 2. Ignore it 2033 * if not, it's just informational and we can still use the media. 2034 */ 2035 if ((media.m_pblksize != 0) && 2036 (media.m_pblksize >= media.m_blksize) && 2037 (ISP2(media.m_pblksize))) 2038 bd->d_pblkshift = ddi_ffs(media.m_pblksize) - 1; 2039 2040 done: 2041 if (state != bd->d_state) { 2042 bd->d_state = state; 2043 cv_broadcast(&bd->d_statecv); 2044 docmlb = B_TRUE; 2045 } 2046 mutex_exit(&bd->d_statemutex); 2047 2048 bd->d_kerr->bd_capacity.value.ui64 = bd->d_numblks << bd->d_blkshift; 2049 2050 if (docmlb) { 2051 if (state == DKIO_INSERTED) { 2052 (void) cmlb_validate(bd->d_cmlbh, 0, 0); 2053 2054 mutex_enter(&bd->d_dle_mutex); 2055 /* 2056 * If there is already an event pending, there's 2057 * nothing to do; we coalesce multiple events. 2058 */ 2059 if ((bd->d_dle_state & BD_DLE_PENDING) == 0) { 2060 if ((bd->d_dle_state & BD_DLE_RUNNING) == 0) { 2061 taskq_dispatch_ent(bd_taskq, 2062 bd_dle_sysevent_task, bd, 0, 2063 &bd->d_dle_ent); 2064 } 2065 bd->d_dle_state |= BD_DLE_PENDING; 2066 } 2067 mutex_exit(&bd->d_dle_mutex); 2068 } else { 2069 cmlb_invalidate(bd->d_cmlbh, 0); 2070 } 2071 } 2072 } 2073 2074 static int 2075 bd_check_state(bd_t *bd, enum dkio_state *state) 2076 { 2077 clock_t when; 2078 2079 for (;;) { 2080 2081 bd_update_state(bd); 2082 2083 mutex_enter(&bd->d_statemutex); 2084 2085 if (bd->d_state != *state) { 2086 *state = bd->d_state; 2087 mutex_exit(&bd->d_statemutex); 2088 break; 2089 } 2090 2091 when = drv_usectohz(1000000); 2092 if (cv_reltimedwait_sig(&bd->d_statecv, &bd->d_statemutex, 2093 when, TR_CLOCK_TICK) == 0) { 2094 mutex_exit(&bd->d_statemutex); 2095 return (EINTR); 2096 } 2097 2098 mutex_exit(&bd->d_statemutex); 2099 } 2100 2101 return (0); 2102 } 2103 2104 static int 2105 bd_flush_write_cache_done(struct buf *bp) 2106 { 2107 struct dk_callback *dc = (void *)bp->b_private; 2108 2109 (*dc->dkc_callback)(dc->dkc_cookie, geterror(bp)); 2110 kmem_free(dc, sizeof (*dc)); 2111 freerbuf(bp); 2112 return (0); 2113 } 2114 2115 static int 2116 bd_flush_write_cache(bd_t *bd, struct dk_callback *dkc) 2117 { 2118 buf_t *bp; 2119 struct dk_callback *dc; 2120 bd_xfer_impl_t *xi; 2121 int rv; 2122 2123 if (bd->d_ops.o_sync_cache == NULL) { 2124 return (ENOTSUP); 2125 } 2126 if ((bp = getrbuf(KM_SLEEP)) == NULL) { 2127 return (ENOMEM); 2128 } 2129 bp->b_resid = 0; 2130 bp->b_bcount = 0; 2131 2132 xi = bd_xfer_alloc(bd, bp, bd->d_ops.o_sync_cache, KM_SLEEP); 2133 if (xi == NULL) { 2134 rv = geterror(bp); 2135 freerbuf(bp); 2136 return (rv); 2137 } 2138 2139 /* Make an asynchronous flush, but only if there is a callback */ 2140 if (dkc != NULL && dkc->dkc_callback != NULL) { 2141 /* Make a private copy of the callback structure */ 2142 dc = kmem_alloc(sizeof (*dc), KM_SLEEP); 2143 *dc = *dkc; 2144 bp->b_private = dc; 2145 bp->b_iodone = bd_flush_write_cache_done; 2146 2147 bd_submit(bd, xi); 2148 return (0); 2149 } 2150 2151 /* In case there is no callback, perform a synchronous flush */ 2152 bd_submit(bd, xi); 2153 (void) biowait(bp); 2154 rv = geterror(bp); 2155 freerbuf(bp); 2156 2157 return (rv); 2158 } 2159 2160 static int 2161 bd_free_space_done(struct buf *bp) 2162 { 2163 freerbuf(bp); 2164 return (0); 2165 } 2166 2167 static int 2168 bd_free_space_cb(dkioc_free_list_t *dfl, void *arg, int kmflag) 2169 { 2170 bd_t *bd = arg; 2171 buf_t *bp = NULL; 2172 bd_xfer_impl_t *xi = NULL; 2173 boolean_t sync = DFL_ISSYNC(dfl) ? B_TRUE : B_FALSE; 2174 int rv = 0; 2175 2176 bp = getrbuf(KM_SLEEP); 2177 bp->b_resid = 0; 2178 bp->b_bcount = 0; 2179 bp->b_lblkno = 0; 2180 2181 xi = bd_xfer_alloc(bd, bp, bd->d_ops.o_free_space, kmflag); 2182 xi->i_dfl = dfl; 2183 2184 if (!sync) { 2185 bp->b_iodone = bd_free_space_done; 2186 bd_submit(bd, xi); 2187 return (0); 2188 } 2189 2190 xi->i_flags |= BD_XFER_POLL; 2191 bd_submit(bd, xi); 2192 2193 (void) biowait(bp); 2194 rv = geterror(bp); 2195 freerbuf(bp); 2196 2197 return (rv); 2198 } 2199 2200 static int 2201 bd_free_space(dev_t dev, bd_t *bd, dkioc_free_list_t *dfl) 2202 { 2203 diskaddr_t p_len, p_offset; 2204 uint64_t offset_bytes, len_bytes; 2205 minor_t part = BDPART(dev); 2206 const uint_t bshift = bd->d_blkshift; 2207 dkioc_free_info_t dfi = { 2208 .dfi_bshift = bshift, 2209 .dfi_align = bd->d_free_align << bshift, 2210 .dfi_max_bytes = bd->d_max_free_blks << bshift, 2211 .dfi_max_ext = bd->d_max_free_seg, 2212 .dfi_max_ext_bytes = bd->d_max_free_seg_blks << bshift, 2213 }; 2214 2215 if (cmlb_partinfo(bd->d_cmlbh, part, &p_len, &p_offset, NULL, 2216 NULL, 0) != 0) { 2217 dfl_free(dfl); 2218 return (ENXIO); 2219 } 2220 2221 /* 2222 * bd_ioctl created our own copy of dfl, so we can modify as 2223 * necessary 2224 */ 2225 offset_bytes = (uint64_t)p_offset << bshift; 2226 len_bytes = (uint64_t)p_len << bshift; 2227 2228 dfl->dfl_offset += offset_bytes; 2229 if (dfl->dfl_offset < offset_bytes) { 2230 dfl_free(dfl); 2231 return (EOVERFLOW); 2232 } 2233 2234 return (dfl_iter(dfl, &dfi, offset_bytes + len_bytes, bd_free_space_cb, 2235 bd, KM_SLEEP)); 2236 } 2237 2238 /* 2239 * Nexus support. 2240 */ 2241 int 2242 bd_bus_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_ctl_enum_t ctlop, 2243 void *arg, void *result) 2244 { 2245 bd_handle_t hdl; 2246 2247 switch (ctlop) { 2248 case DDI_CTLOPS_REPORTDEV: 2249 cmn_err(CE_CONT, "?Block device: %s@%s, %s%d\n", 2250 ddi_node_name(rdip), ddi_get_name_addr(rdip), 2251 ddi_driver_name(rdip), ddi_get_instance(rdip)); 2252 return (DDI_SUCCESS); 2253 2254 case DDI_CTLOPS_INITCHILD: 2255 hdl = ddi_get_parent_data((dev_info_t *)arg); 2256 if (hdl == NULL) { 2257 return (DDI_NOT_WELL_FORMED); 2258 } 2259 ddi_set_name_addr((dev_info_t *)arg, hdl->h_addr); 2260 return (DDI_SUCCESS); 2261 2262 case DDI_CTLOPS_UNINITCHILD: 2263 ddi_set_name_addr((dev_info_t *)arg, NULL); 2264 ndi_prop_remove_all((dev_info_t *)arg); 2265 return (DDI_SUCCESS); 2266 2267 default: 2268 return (ddi_ctlops(dip, rdip, ctlop, arg, result)); 2269 } 2270 } 2271 2272 /* 2273 * Functions for device drivers. 2274 */ 2275 bd_handle_t 2276 bd_alloc_handle(void *private, bd_ops_t *ops, ddi_dma_attr_t *dma, int kmflag) 2277 { 2278 bd_handle_t hdl; 2279 2280 switch (ops->o_version) { 2281 case BD_OPS_VERSION_0: 2282 case BD_OPS_VERSION_1: 2283 case BD_OPS_VERSION_2: 2284 break; 2285 2286 default: 2287 /* Unsupported version */ 2288 return (NULL); 2289 } 2290 2291 hdl = kmem_zalloc(sizeof (*hdl), kmflag); 2292 if (hdl == NULL) { 2293 return (NULL); 2294 } 2295 2296 switch (ops->o_version) { 2297 case BD_OPS_VERSION_2: 2298 hdl->h_ops.o_free_space = ops->o_free_space; 2299 /*FALLTHRU*/ 2300 case BD_OPS_VERSION_1: 2301 case BD_OPS_VERSION_0: 2302 hdl->h_ops.o_drive_info = ops->o_drive_info; 2303 hdl->h_ops.o_media_info = ops->o_media_info; 2304 hdl->h_ops.o_devid_init = ops->o_devid_init; 2305 hdl->h_ops.o_sync_cache = ops->o_sync_cache; 2306 hdl->h_ops.o_read = ops->o_read; 2307 hdl->h_ops.o_write = ops->o_write; 2308 break; 2309 } 2310 2311 hdl->h_dma = dma; 2312 hdl->h_private = private; 2313 2314 return (hdl); 2315 } 2316 2317 void 2318 bd_free_handle(bd_handle_t hdl) 2319 { 2320 kmem_free(hdl, sizeof (*hdl)); 2321 } 2322 2323 int 2324 bd_attach_handle(dev_info_t *dip, bd_handle_t hdl) 2325 { 2326 dev_info_t *child; 2327 bd_drive_t drive = { 0 }; 2328 2329 /* 2330 * It's not an error if bd_attach_handle() is called on a handle that 2331 * already is attached. We just ignore the request to attach and return. 2332 * This way drivers using blkdev don't have to keep track about blkdev 2333 * state, they can just call this function to make sure it attached. 2334 */ 2335 if (hdl->h_child != NULL) { 2336 return (DDI_SUCCESS); 2337 } 2338 2339 /* if drivers don't override this, make it assume none */ 2340 drive.d_lun = -1; 2341 hdl->h_ops.o_drive_info(hdl->h_private, &drive); 2342 2343 hdl->h_parent = dip; 2344 hdl->h_name = "blkdev"; 2345 2346 /*LINTED: E_BAD_PTR_CAST_ALIGN*/ 2347 if (*(uint64_t *)drive.d_eui64 != 0) { 2348 if (drive.d_lun >= 0) { 2349 (void) snprintf(hdl->h_addr, sizeof (hdl->h_addr), 2350 "w%02X%02X%02X%02X%02X%02X%02X%02X,%X", 2351 drive.d_eui64[0], drive.d_eui64[1], 2352 drive.d_eui64[2], drive.d_eui64[3], 2353 drive.d_eui64[4], drive.d_eui64[5], 2354 drive.d_eui64[6], drive.d_eui64[7], drive.d_lun); 2355 } else { 2356 (void) snprintf(hdl->h_addr, sizeof (hdl->h_addr), 2357 "w%02X%02X%02X%02X%02X%02X%02X%02X", 2358 drive.d_eui64[0], drive.d_eui64[1], 2359 drive.d_eui64[2], drive.d_eui64[3], 2360 drive.d_eui64[4], drive.d_eui64[5], 2361 drive.d_eui64[6], drive.d_eui64[7]); 2362 } 2363 } else { 2364 if (drive.d_lun >= 0) { 2365 (void) snprintf(hdl->h_addr, sizeof (hdl->h_addr), 2366 "%X,%X", drive.d_target, drive.d_lun); 2367 } else { 2368 (void) snprintf(hdl->h_addr, sizeof (hdl->h_addr), 2369 "%X", drive.d_target); 2370 } 2371 } 2372 2373 if (ndi_devi_alloc(dip, hdl->h_name, (pnode_t)DEVI_SID_NODEID, 2374 &child) != NDI_SUCCESS) { 2375 cmn_err(CE_WARN, "%s%d: unable to allocate node %s@%s", 2376 ddi_driver_name(dip), ddi_get_instance(dip), 2377 "blkdev", hdl->h_addr); 2378 return (DDI_FAILURE); 2379 } 2380 2381 ddi_set_parent_data(child, hdl); 2382 hdl->h_child = child; 2383 2384 if (ndi_devi_online(child, 0) != NDI_SUCCESS) { 2385 cmn_err(CE_WARN, "%s%d: failed bringing node %s@%s online", 2386 ddi_driver_name(dip), ddi_get_instance(dip), 2387 hdl->h_name, hdl->h_addr); 2388 (void) ndi_devi_free(child); 2389 hdl->h_child = NULL; 2390 return (DDI_FAILURE); 2391 } 2392 2393 return (DDI_SUCCESS); 2394 } 2395 2396 int 2397 bd_detach_handle(bd_handle_t hdl) 2398 { 2399 int circ; 2400 int rv; 2401 char *devnm; 2402 2403 /* 2404 * It's not an error if bd_detach_handle() is called on a handle that 2405 * already is detached. We just ignore the request to detach and return. 2406 * This way drivers using blkdev don't have to keep track about blkdev 2407 * state, they can just call this function to make sure it detached. 2408 */ 2409 if (hdl->h_child == NULL) { 2410 return (DDI_SUCCESS); 2411 } 2412 ndi_devi_enter(hdl->h_parent, &circ); 2413 if (i_ddi_node_state(hdl->h_child) < DS_INITIALIZED) { 2414 rv = ddi_remove_child(hdl->h_child, 0); 2415 } else { 2416 devnm = kmem_alloc(MAXNAMELEN + 1, KM_SLEEP); 2417 (void) ddi_deviname(hdl->h_child, devnm); 2418 (void) devfs_clean(hdl->h_parent, devnm + 1, DV_CLEAN_FORCE); 2419 rv = ndi_devi_unconfig_one(hdl->h_parent, devnm + 1, NULL, 2420 NDI_DEVI_REMOVE | NDI_UNCONFIG); 2421 kmem_free(devnm, MAXNAMELEN + 1); 2422 } 2423 if (rv == 0) { 2424 hdl->h_child = NULL; 2425 } 2426 2427 ndi_devi_exit(hdl->h_parent, circ); 2428 return (rv == NDI_SUCCESS ? DDI_SUCCESS : DDI_FAILURE); 2429 } 2430 2431 void 2432 bd_xfer_done(bd_xfer_t *xfer, int err) 2433 { 2434 bd_xfer_impl_t *xi = (void *)xfer; 2435 buf_t *bp = xi->i_bp; 2436 int rv = DDI_SUCCESS; 2437 bd_t *bd = xi->i_bd; 2438 size_t len; 2439 2440 if (err != 0) { 2441 bd_runq_exit(xi, err); 2442 atomic_inc_32(&bd->d_kerr->bd_harderrs.value.ui32); 2443 2444 bp->b_resid += xi->i_resid; 2445 bd_xfer_free(xi); 2446 bioerror(bp, err); 2447 biodone(bp); 2448 return; 2449 } 2450 2451 xi->i_cur_win++; 2452 xi->i_resid -= xi->i_len; 2453 2454 if (xi->i_resid == 0) { 2455 /* Job completed succcessfully! */ 2456 bd_runq_exit(xi, 0); 2457 2458 bd_xfer_free(xi); 2459 biodone(bp); 2460 return; 2461 } 2462 2463 xi->i_blkno += xi->i_nblks; 2464 2465 if (bd->d_use_dma) { 2466 /* More transfer still pending... advance to next DMA window. */ 2467 rv = ddi_dma_getwin(xi->i_dmah, xi->i_cur_win, 2468 &xi->i_offset, &len, &xi->i_dmac, &xi->i_ndmac); 2469 } else { 2470 /* Advance memory window. */ 2471 xi->i_kaddr += xi->i_len; 2472 xi->i_offset += xi->i_len; 2473 len = min(bp->b_bcount - xi->i_offset, bd->d_maxxfer); 2474 } 2475 2476 2477 if ((rv != DDI_SUCCESS) || 2478 (P2PHASE(len, (1U << xi->i_blkshift)) != 0)) { 2479 bd_runq_exit(xi, EFAULT); 2480 2481 bp->b_resid += xi->i_resid; 2482 bd_xfer_free(xi); 2483 bioerror(bp, EFAULT); 2484 biodone(bp); 2485 return; 2486 } 2487 xi->i_len = len; 2488 xi->i_nblks = len >> xi->i_blkshift; 2489 2490 /* Submit next window to hardware. */ 2491 rv = xi->i_func(bd->d_private, &xi->i_public); 2492 if (rv != 0) { 2493 bd_runq_exit(xi, rv); 2494 2495 atomic_inc_32(&bd->d_kerr->bd_transerrs.value.ui32); 2496 2497 bp->b_resid += xi->i_resid; 2498 bd_xfer_free(xi); 2499 bioerror(bp, rv); 2500 biodone(bp); 2501 } 2502 } 2503 2504 void 2505 bd_error(bd_xfer_t *xfer, int error) 2506 { 2507 bd_xfer_impl_t *xi = (void *)xfer; 2508 bd_t *bd = xi->i_bd; 2509 2510 switch (error) { 2511 case BD_ERR_MEDIA: 2512 atomic_inc_32(&bd->d_kerr->bd_rq_media_err.value.ui32); 2513 break; 2514 case BD_ERR_NTRDY: 2515 atomic_inc_32(&bd->d_kerr->bd_rq_ntrdy_err.value.ui32); 2516 break; 2517 case BD_ERR_NODEV: 2518 atomic_inc_32(&bd->d_kerr->bd_rq_nodev_err.value.ui32); 2519 break; 2520 case BD_ERR_RECOV: 2521 atomic_inc_32(&bd->d_kerr->bd_rq_recov_err.value.ui32); 2522 break; 2523 case BD_ERR_ILLRQ: 2524 atomic_inc_32(&bd->d_kerr->bd_rq_illrq_err.value.ui32); 2525 break; 2526 case BD_ERR_PFA: 2527 atomic_inc_32(&bd->d_kerr->bd_rq_pfa_err.value.ui32); 2528 break; 2529 default: 2530 cmn_err(CE_PANIC, "bd_error: unknown error type %d", error); 2531 break; 2532 } 2533 } 2534 2535 void 2536 bd_state_change(bd_handle_t hdl) 2537 { 2538 bd_t *bd; 2539 2540 if ((bd = hdl->h_bd) != NULL) { 2541 bd_update_state(bd); 2542 } 2543 } 2544 2545 void 2546 bd_mod_init(struct dev_ops *devops) 2547 { 2548 static struct bus_ops bd_bus_ops = { 2549 BUSO_REV, /* busops_rev */ 2550 nullbusmap, /* bus_map */ 2551 NULL, /* bus_get_intrspec (OBSOLETE) */ 2552 NULL, /* bus_add_intrspec (OBSOLETE) */ 2553 NULL, /* bus_remove_intrspec (OBSOLETE) */ 2554 i_ddi_map_fault, /* bus_map_fault */ 2555 NULL, /* bus_dma_map (OBSOLETE) */ 2556 ddi_dma_allochdl, /* bus_dma_allochdl */ 2557 ddi_dma_freehdl, /* bus_dma_freehdl */ 2558 ddi_dma_bindhdl, /* bus_dma_bindhdl */ 2559 ddi_dma_unbindhdl, /* bus_dma_unbindhdl */ 2560 ddi_dma_flush, /* bus_dma_flush */ 2561 ddi_dma_win, /* bus_dma_win */ 2562 ddi_dma_mctl, /* bus_dma_ctl */ 2563 bd_bus_ctl, /* bus_ctl */ 2564 ddi_bus_prop_op, /* bus_prop_op */ 2565 NULL, /* bus_get_eventcookie */ 2566 NULL, /* bus_add_eventcall */ 2567 NULL, /* bus_remove_eventcall */ 2568 NULL, /* bus_post_event */ 2569 NULL, /* bus_intr_ctl (OBSOLETE) */ 2570 NULL, /* bus_config */ 2571 NULL, /* bus_unconfig */ 2572 NULL, /* bus_fm_init */ 2573 NULL, /* bus_fm_fini */ 2574 NULL, /* bus_fm_access_enter */ 2575 NULL, /* bus_fm_access_exit */ 2576 NULL, /* bus_power */ 2577 NULL, /* bus_intr_op */ 2578 }; 2579 2580 devops->devo_bus_ops = &bd_bus_ops; 2581 2582 /* 2583 * NB: The device driver is free to supply its own 2584 * character entry device support. 2585 */ 2586 } 2587 2588 void 2589 bd_mod_fini(struct dev_ops *devops) 2590 { 2591 devops->devo_bus_ops = NULL; 2592 } 2593