cam_xpt.c revision 273308
1/*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: stable/10/sys/cam/cam_xpt.c 273308 2014-10-20 07:29:43Z mav $"); 32 33#include <sys/param.h> 34#include <sys/bus.h> 35#include <sys/systm.h> 36#include <sys/types.h> 37#include <sys/malloc.h> 38#include <sys/kernel.h> 39#include <sys/time.h> 40#include <sys/conf.h> 41#include <sys/fcntl.h> 42#include <sys/interrupt.h> 43#include <sys/proc.h> 44#include <sys/sbuf.h> 45#include <sys/smp.h> 46#include <sys/taskqueue.h> 47 48#include <sys/lock.h> 49#include <sys/mutex.h> 50#include <sys/sysctl.h> 51#include <sys/kthread.h> 52 53#include <cam/cam.h> 54#include <cam/cam_ccb.h> 55#include <cam/cam_periph.h> 56#include <cam/cam_queue.h> 57#include <cam/cam_sim.h> 58#include <cam/cam_xpt.h> 59#include <cam/cam_xpt_sim.h> 60#include <cam/cam_xpt_periph.h> 61#include <cam/cam_xpt_internal.h> 62#include <cam/cam_debug.h> 63#include <cam/cam_compat.h> 64 65#include <cam/scsi/scsi_all.h> 66#include <cam/scsi/scsi_message.h> 67#include <cam/scsi/scsi_pass.h> 68 69#include <machine/md_var.h> /* geometry translation */ 70#include <machine/stdarg.h> /* for xpt_print below */ 71 72#include "opt_cam.h" 73 74/* 75 * This is the maximum number of high powered commands (e.g. start unit) 76 * that can be outstanding at a particular time. 77 */ 78#ifndef CAM_MAX_HIGHPOWER 79#define CAM_MAX_HIGHPOWER 4 80#endif 81 82/* Datastructures internal to the xpt layer */ 83MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 84MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 85MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 86MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 87 88/* Object for defering XPT actions to a taskqueue */ 89struct xpt_task { 90 struct task task; 91 void *data1; 92 uintptr_t data2; 93}; 94 95struct xpt_softc { 96 /* number of high powered commands that can go through right now */ 97 struct mtx xpt_highpower_lock; 98 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 99 int num_highpower; 100 101 /* queue for handling async rescan requests. */ 102 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 103 int buses_to_config; 104 int buses_config_done; 105 106 /* Registered busses */ 107 TAILQ_HEAD(,cam_eb) xpt_busses; 108 u_int bus_generation; 109 110 struct intr_config_hook *xpt_config_hook; 111 112 int boot_delay; 113 struct callout boot_callout; 114 115 struct mtx xpt_topo_lock; 116 struct mtx xpt_lock; 117 struct taskqueue *xpt_taskq; 118}; 119 120typedef enum { 121 DM_RET_COPY = 0x01, 122 DM_RET_FLAG_MASK = 0x0f, 123 DM_RET_NONE = 0x00, 124 DM_RET_STOP = 0x10, 125 DM_RET_DESCEND = 0x20, 126 DM_RET_ERROR = 0x30, 127 DM_RET_ACTION_MASK = 0xf0 128} dev_match_ret; 129 130typedef enum { 131 XPT_DEPTH_BUS, 132 XPT_DEPTH_TARGET, 133 XPT_DEPTH_DEVICE, 134 XPT_DEPTH_PERIPH 135} xpt_traverse_depth; 136 137struct xpt_traverse_config { 138 xpt_traverse_depth depth; 139 void *tr_func; 140 void *tr_arg; 141}; 142 143typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 144typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 145typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 146typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 147typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 148 149/* Transport layer configuration information */ 150static struct xpt_softc xsoftc; 151 152TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay); 153SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 154 &xsoftc.boot_delay, 0, "Bus registration wait time"); 155 156struct cam_doneq { 157 struct mtx_padalign cam_doneq_mtx; 158 STAILQ_HEAD(, ccb_hdr) cam_doneq; 159 int cam_doneq_sleep; 160}; 161 162static struct cam_doneq cam_doneqs[MAXCPU]; 163static int cam_num_doneqs; 164static struct proc *cam_proc; 165 166TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs); 167SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 168 &cam_num_doneqs, 0, "Number of completion queues/threads"); 169 170struct cam_periph *xpt_periph; 171 172static periph_init_t xpt_periph_init; 173 174static struct periph_driver xpt_driver = 175{ 176 xpt_periph_init, "xpt", 177 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 178 CAM_PERIPH_DRV_EARLY 179}; 180 181PERIPHDRIVER_DECLARE(xpt, xpt_driver); 182 183static d_open_t xptopen; 184static d_close_t xptclose; 185static d_ioctl_t xptioctl; 186static d_ioctl_t xptdoioctl; 187 188static struct cdevsw xpt_cdevsw = { 189 .d_version = D_VERSION, 190 .d_flags = 0, 191 .d_open = xptopen, 192 .d_close = xptclose, 193 .d_ioctl = xptioctl, 194 .d_name = "xpt", 195}; 196 197/* Storage for debugging datastructures */ 198struct cam_path *cam_dpath; 199u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 200TUNABLE_INT("kern.cam.dflags", &cam_dflags); 201SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW, 202 &cam_dflags, 0, "Enabled debug flags"); 203u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 204TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay); 205SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW, 206 &cam_debug_delay, 0, "Delay in us after each debug message"); 207 208/* Our boot-time initialization hook */ 209static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 210 211static moduledata_t cam_moduledata = { 212 "cam", 213 cam_module_event_handler, 214 NULL 215}; 216 217static int xpt_init(void *); 218 219DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 220MODULE_VERSION(cam, 1); 221 222 223static void xpt_async_bcast(struct async_list *async_head, 224 u_int32_t async_code, 225 struct cam_path *path, 226 void *async_arg); 227static path_id_t xptnextfreepathid(void); 228static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 229static union ccb *xpt_get_ccb(struct cam_periph *periph); 230static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 231static void xpt_run_allocq(struct cam_periph *periph, int sleep); 232static void xpt_run_allocq_task(void *context, int pending); 233static void xpt_run_devq(struct cam_devq *devq); 234static timeout_t xpt_release_devq_timeout; 235static void xpt_release_simq_timeout(void *arg) __unused; 236static void xpt_acquire_bus(struct cam_eb *bus); 237static void xpt_release_bus(struct cam_eb *bus); 238static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 239static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 240 int run_queue); 241static struct cam_et* 242 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 243static void xpt_acquire_target(struct cam_et *target); 244static void xpt_release_target(struct cam_et *target); 245static struct cam_eb* 246 xpt_find_bus(path_id_t path_id); 247static struct cam_et* 248 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 249static struct cam_ed* 250 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 251static void xpt_config(void *arg); 252static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 253 u_int32_t new_priority); 254static xpt_devicefunc_t xptpassannouncefunc; 255static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 256static void xptpoll(struct cam_sim *sim); 257static void camisr_runqueue(void); 258static void xpt_done_process(struct ccb_hdr *ccb_h); 259static void xpt_done_td(void *); 260static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 261 u_int num_patterns, struct cam_eb *bus); 262static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 263 u_int num_patterns, 264 struct cam_ed *device); 265static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 266 u_int num_patterns, 267 struct cam_periph *periph); 268static xpt_busfunc_t xptedtbusfunc; 269static xpt_targetfunc_t xptedttargetfunc; 270static xpt_devicefunc_t xptedtdevicefunc; 271static xpt_periphfunc_t xptedtperiphfunc; 272static xpt_pdrvfunc_t xptplistpdrvfunc; 273static xpt_periphfunc_t xptplistperiphfunc; 274static int xptedtmatch(struct ccb_dev_match *cdm); 275static int xptperiphlistmatch(struct ccb_dev_match *cdm); 276static int xptbustraverse(struct cam_eb *start_bus, 277 xpt_busfunc_t *tr_func, void *arg); 278static int xpttargettraverse(struct cam_eb *bus, 279 struct cam_et *start_target, 280 xpt_targetfunc_t *tr_func, void *arg); 281static int xptdevicetraverse(struct cam_et *target, 282 struct cam_ed *start_device, 283 xpt_devicefunc_t *tr_func, void *arg); 284static int xptperiphtraverse(struct cam_ed *device, 285 struct cam_periph *start_periph, 286 xpt_periphfunc_t *tr_func, void *arg); 287static int xptpdrvtraverse(struct periph_driver **start_pdrv, 288 xpt_pdrvfunc_t *tr_func, void *arg); 289static int xptpdperiphtraverse(struct periph_driver **pdrv, 290 struct cam_periph *start_periph, 291 xpt_periphfunc_t *tr_func, 292 void *arg); 293static xpt_busfunc_t xptdefbusfunc; 294static xpt_targetfunc_t xptdeftargetfunc; 295static xpt_devicefunc_t xptdefdevicefunc; 296static xpt_periphfunc_t xptdefperiphfunc; 297static void xpt_finishconfig_task(void *context, int pending); 298static void xpt_dev_async_default(u_int32_t async_code, 299 struct cam_eb *bus, 300 struct cam_et *target, 301 struct cam_ed *device, 302 void *async_arg); 303static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 304 struct cam_et *target, 305 lun_id_t lun_id); 306static xpt_devicefunc_t xptsetasyncfunc; 307static xpt_busfunc_t xptsetasyncbusfunc; 308static cam_status xptregister(struct cam_periph *periph, 309 void *arg); 310static __inline int device_is_queued(struct cam_ed *device); 311 312static __inline int 313xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 314{ 315 int retval; 316 317 mtx_assert(&devq->send_mtx, MA_OWNED); 318 if ((dev->ccbq.queue.entries > 0) && 319 (dev->ccbq.dev_openings > 0) && 320 (dev->ccbq.queue.qfrozen_cnt == 0)) { 321 /* 322 * The priority of a device waiting for controller 323 * resources is that of the highest priority CCB 324 * enqueued. 325 */ 326 retval = 327 xpt_schedule_dev(&devq->send_queue, 328 &dev->devq_entry, 329 CAMQ_GET_PRIO(&dev->ccbq.queue)); 330 } else { 331 retval = 0; 332 } 333 return (retval); 334} 335 336static __inline int 337device_is_queued(struct cam_ed *device) 338{ 339 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 340} 341 342static void 343xpt_periph_init() 344{ 345 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 346} 347 348static int 349xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 350{ 351 352 /* 353 * Only allow read-write access. 354 */ 355 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 356 return(EPERM); 357 358 /* 359 * We don't allow nonblocking access. 360 */ 361 if ((flags & O_NONBLOCK) != 0) { 362 printf("%s: can't do nonblocking access\n", devtoname(dev)); 363 return(ENODEV); 364 } 365 366 return(0); 367} 368 369static int 370xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 371{ 372 373 return(0); 374} 375 376/* 377 * Don't automatically grab the xpt softc lock here even though this is going 378 * through the xpt device. The xpt device is really just a back door for 379 * accessing other devices and SIMs, so the right thing to do is to grab 380 * the appropriate SIM lock once the bus/SIM is located. 381 */ 382static int 383xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 384{ 385 int error; 386 387 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 388 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 389 } 390 return (error); 391} 392 393static int 394xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 395{ 396 int error; 397 398 error = 0; 399 400 switch(cmd) { 401 /* 402 * For the transport layer CAMIOCOMMAND ioctl, we really only want 403 * to accept CCB types that don't quite make sense to send through a 404 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 405 * in the CAM spec. 406 */ 407 case CAMIOCOMMAND: { 408 union ccb *ccb; 409 union ccb *inccb; 410 struct cam_eb *bus; 411 412 inccb = (union ccb *)addr; 413 414 bus = xpt_find_bus(inccb->ccb_h.path_id); 415 if (bus == NULL) 416 return (EINVAL); 417 418 switch (inccb->ccb_h.func_code) { 419 case XPT_SCAN_BUS: 420 case XPT_RESET_BUS: 421 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 422 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 423 xpt_release_bus(bus); 424 return (EINVAL); 425 } 426 break; 427 case XPT_SCAN_TGT: 428 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 429 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 430 xpt_release_bus(bus); 431 return (EINVAL); 432 } 433 break; 434 default: 435 break; 436 } 437 438 switch(inccb->ccb_h.func_code) { 439 case XPT_SCAN_BUS: 440 case XPT_RESET_BUS: 441 case XPT_PATH_INQ: 442 case XPT_ENG_INQ: 443 case XPT_SCAN_LUN: 444 case XPT_SCAN_TGT: 445 446 ccb = xpt_alloc_ccb(); 447 448 /* 449 * Create a path using the bus, target, and lun the 450 * user passed in. 451 */ 452 if (xpt_create_path(&ccb->ccb_h.path, NULL, 453 inccb->ccb_h.path_id, 454 inccb->ccb_h.target_id, 455 inccb->ccb_h.target_lun) != 456 CAM_REQ_CMP){ 457 error = EINVAL; 458 xpt_free_ccb(ccb); 459 break; 460 } 461 /* Ensure all of our fields are correct */ 462 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 463 inccb->ccb_h.pinfo.priority); 464 xpt_merge_ccb(ccb, inccb); 465 xpt_path_lock(ccb->ccb_h.path); 466 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 467 xpt_path_unlock(ccb->ccb_h.path); 468 bcopy(ccb, inccb, sizeof(union ccb)); 469 xpt_free_path(ccb->ccb_h.path); 470 xpt_free_ccb(ccb); 471 break; 472 473 case XPT_DEBUG: { 474 union ccb ccb; 475 476 /* 477 * This is an immediate CCB, so it's okay to 478 * allocate it on the stack. 479 */ 480 481 /* 482 * Create a path using the bus, target, and lun the 483 * user passed in. 484 */ 485 if (xpt_create_path(&ccb.ccb_h.path, NULL, 486 inccb->ccb_h.path_id, 487 inccb->ccb_h.target_id, 488 inccb->ccb_h.target_lun) != 489 CAM_REQ_CMP){ 490 error = EINVAL; 491 break; 492 } 493 /* Ensure all of our fields are correct */ 494 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 495 inccb->ccb_h.pinfo.priority); 496 xpt_merge_ccb(&ccb, inccb); 497 xpt_action(&ccb); 498 bcopy(&ccb, inccb, sizeof(union ccb)); 499 xpt_free_path(ccb.ccb_h.path); 500 break; 501 502 } 503 case XPT_DEV_MATCH: { 504 struct cam_periph_map_info mapinfo; 505 struct cam_path *old_path; 506 507 /* 508 * We can't deal with physical addresses for this 509 * type of transaction. 510 */ 511 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 512 CAM_DATA_VADDR) { 513 error = EINVAL; 514 break; 515 } 516 517 /* 518 * Save this in case the caller had it set to 519 * something in particular. 520 */ 521 old_path = inccb->ccb_h.path; 522 523 /* 524 * We really don't need a path for the matching 525 * code. The path is needed because of the 526 * debugging statements in xpt_action(). They 527 * assume that the CCB has a valid path. 528 */ 529 inccb->ccb_h.path = xpt_periph->path; 530 531 bzero(&mapinfo, sizeof(mapinfo)); 532 533 /* 534 * Map the pattern and match buffers into kernel 535 * virtual address space. 536 */ 537 error = cam_periph_mapmem(inccb, &mapinfo); 538 539 if (error) { 540 inccb->ccb_h.path = old_path; 541 break; 542 } 543 544 /* 545 * This is an immediate CCB, we can send it on directly. 546 */ 547 xpt_action(inccb); 548 549 /* 550 * Map the buffers back into user space. 551 */ 552 cam_periph_unmapmem(inccb, &mapinfo); 553 554 inccb->ccb_h.path = old_path; 555 556 error = 0; 557 break; 558 } 559 default: 560 error = ENOTSUP; 561 break; 562 } 563 xpt_release_bus(bus); 564 break; 565 } 566 /* 567 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 568 * with the periphal driver name and unit name filled in. The other 569 * fields don't really matter as input. The passthrough driver name 570 * ("pass"), and unit number are passed back in the ccb. The current 571 * device generation number, and the index into the device peripheral 572 * driver list, and the status are also passed back. Note that 573 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 574 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 575 * (or rather should be) impossible for the device peripheral driver 576 * list to change since we look at the whole thing in one pass, and 577 * we do it with lock protection. 578 * 579 */ 580 case CAMGETPASSTHRU: { 581 union ccb *ccb; 582 struct cam_periph *periph; 583 struct periph_driver **p_drv; 584 char *name; 585 u_int unit; 586 int base_periph_found; 587 588 ccb = (union ccb *)addr; 589 unit = ccb->cgdl.unit_number; 590 name = ccb->cgdl.periph_name; 591 base_periph_found = 0; 592 593 /* 594 * Sanity check -- make sure we don't get a null peripheral 595 * driver name. 596 */ 597 if (*ccb->cgdl.periph_name == '\0') { 598 error = EINVAL; 599 break; 600 } 601 602 /* Keep the list from changing while we traverse it */ 603 xpt_lock_buses(); 604 605 /* first find our driver in the list of drivers */ 606 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 607 if (strcmp((*p_drv)->driver_name, name) == 0) 608 break; 609 610 if (*p_drv == NULL) { 611 xpt_unlock_buses(); 612 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 613 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 614 *ccb->cgdl.periph_name = '\0'; 615 ccb->cgdl.unit_number = 0; 616 error = ENOENT; 617 break; 618 } 619 620 /* 621 * Run through every peripheral instance of this driver 622 * and check to see whether it matches the unit passed 623 * in by the user. If it does, get out of the loops and 624 * find the passthrough driver associated with that 625 * peripheral driver. 626 */ 627 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 628 periph = TAILQ_NEXT(periph, unit_links)) { 629 630 if (periph->unit_number == unit) 631 break; 632 } 633 /* 634 * If we found the peripheral driver that the user passed 635 * in, go through all of the peripheral drivers for that 636 * particular device and look for a passthrough driver. 637 */ 638 if (periph != NULL) { 639 struct cam_ed *device; 640 int i; 641 642 base_periph_found = 1; 643 device = periph->path->device; 644 for (i = 0, periph = SLIST_FIRST(&device->periphs); 645 periph != NULL; 646 periph = SLIST_NEXT(periph, periph_links), i++) { 647 /* 648 * Check to see whether we have a 649 * passthrough device or not. 650 */ 651 if (strcmp(periph->periph_name, "pass") == 0) { 652 /* 653 * Fill in the getdevlist fields. 654 */ 655 strcpy(ccb->cgdl.periph_name, 656 periph->periph_name); 657 ccb->cgdl.unit_number = 658 periph->unit_number; 659 if (SLIST_NEXT(periph, periph_links)) 660 ccb->cgdl.status = 661 CAM_GDEVLIST_MORE_DEVS; 662 else 663 ccb->cgdl.status = 664 CAM_GDEVLIST_LAST_DEVICE; 665 ccb->cgdl.generation = 666 device->generation; 667 ccb->cgdl.index = i; 668 /* 669 * Fill in some CCB header fields 670 * that the user may want. 671 */ 672 ccb->ccb_h.path_id = 673 periph->path->bus->path_id; 674 ccb->ccb_h.target_id = 675 periph->path->target->target_id; 676 ccb->ccb_h.target_lun = 677 periph->path->device->lun_id; 678 ccb->ccb_h.status = CAM_REQ_CMP; 679 break; 680 } 681 } 682 } 683 684 /* 685 * If the periph is null here, one of two things has 686 * happened. The first possibility is that we couldn't 687 * find the unit number of the particular peripheral driver 688 * that the user is asking about. e.g. the user asks for 689 * the passthrough driver for "da11". We find the list of 690 * "da" peripherals all right, but there is no unit 11. 691 * The other possibility is that we went through the list 692 * of peripheral drivers attached to the device structure, 693 * but didn't find one with the name "pass". Either way, 694 * we return ENOENT, since we couldn't find something. 695 */ 696 if (periph == NULL) { 697 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 698 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 699 *ccb->cgdl.periph_name = '\0'; 700 ccb->cgdl.unit_number = 0; 701 error = ENOENT; 702 /* 703 * It is unfortunate that this is even necessary, 704 * but there are many, many clueless users out there. 705 * If this is true, the user is looking for the 706 * passthrough driver, but doesn't have one in his 707 * kernel. 708 */ 709 if (base_periph_found == 1) { 710 printf("xptioctl: pass driver is not in the " 711 "kernel\n"); 712 printf("xptioctl: put \"device pass\" in " 713 "your kernel config file\n"); 714 } 715 } 716 xpt_unlock_buses(); 717 break; 718 } 719 default: 720 error = ENOTTY; 721 break; 722 } 723 724 return(error); 725} 726 727static int 728cam_module_event_handler(module_t mod, int what, void *arg) 729{ 730 int error; 731 732 switch (what) { 733 case MOD_LOAD: 734 if ((error = xpt_init(NULL)) != 0) 735 return (error); 736 break; 737 case MOD_UNLOAD: 738 return EBUSY; 739 default: 740 return EOPNOTSUPP; 741 } 742 743 return 0; 744} 745 746static void 747xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 748{ 749 750 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 751 xpt_free_path(done_ccb->ccb_h.path); 752 xpt_free_ccb(done_ccb); 753 } else { 754 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 755 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 756 } 757 xpt_release_boot(); 758} 759 760/* thread to handle bus rescans */ 761static void 762xpt_scanner_thread(void *dummy) 763{ 764 union ccb *ccb; 765 struct cam_path path; 766 767 xpt_lock_buses(); 768 for (;;) { 769 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 770 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 771 "-", 0); 772 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 773 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 774 xpt_unlock_buses(); 775 776 /* 777 * Since lock can be dropped inside and path freed 778 * by completion callback even before return here, 779 * take our own path copy for reference. 780 */ 781 xpt_copy_path(&path, ccb->ccb_h.path); 782 xpt_path_lock(&path); 783 xpt_action(ccb); 784 xpt_path_unlock(&path); 785 xpt_release_path(&path); 786 787 xpt_lock_buses(); 788 } 789 } 790} 791 792void 793xpt_rescan(union ccb *ccb) 794{ 795 struct ccb_hdr *hdr; 796 797 /* Prepare request */ 798 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 799 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 800 ccb->ccb_h.func_code = XPT_SCAN_BUS; 801 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 802 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 803 ccb->ccb_h.func_code = XPT_SCAN_TGT; 804 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 805 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 806 ccb->ccb_h.func_code = XPT_SCAN_LUN; 807 else { 808 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 809 xpt_free_path(ccb->ccb_h.path); 810 xpt_free_ccb(ccb); 811 return; 812 } 813 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 814 ccb->ccb_h.cbfcnp = xpt_rescan_done; 815 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 816 /* Don't make duplicate entries for the same paths. */ 817 xpt_lock_buses(); 818 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 819 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 820 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 821 wakeup(&xsoftc.ccb_scanq); 822 xpt_unlock_buses(); 823 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 824 xpt_free_path(ccb->ccb_h.path); 825 xpt_free_ccb(ccb); 826 return; 827 } 828 } 829 } 830 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 831 xsoftc.buses_to_config++; 832 wakeup(&xsoftc.ccb_scanq); 833 xpt_unlock_buses(); 834} 835 836/* Functions accessed by the peripheral drivers */ 837static int 838xpt_init(void *dummy) 839{ 840 struct cam_sim *xpt_sim; 841 struct cam_path *path; 842 struct cam_devq *devq; 843 cam_status status; 844 int error, i; 845 846 TAILQ_INIT(&xsoftc.xpt_busses); 847 TAILQ_INIT(&xsoftc.ccb_scanq); 848 STAILQ_INIT(&xsoftc.highpowerq); 849 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 850 851 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 852 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 853 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF); 854 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 855 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 856 857#ifdef CAM_BOOT_DELAY 858 /* 859 * Override this value at compile time to assist our users 860 * who don't use loader to boot a kernel. 861 */ 862 xsoftc.boot_delay = CAM_BOOT_DELAY; 863#endif 864 /* 865 * The xpt layer is, itself, the equivelent of a SIM. 866 * Allow 16 ccbs in the ccb pool for it. This should 867 * give decent parallelism when we probe busses and 868 * perform other XPT functions. 869 */ 870 devq = cam_simq_alloc(16); 871 xpt_sim = cam_sim_alloc(xptaction, 872 xptpoll, 873 "xpt", 874 /*softc*/NULL, 875 /*unit*/0, 876 /*mtx*/&xsoftc.xpt_lock, 877 /*max_dev_transactions*/0, 878 /*max_tagged_dev_transactions*/0, 879 devq); 880 if (xpt_sim == NULL) 881 return (ENOMEM); 882 883 mtx_lock(&xsoftc.xpt_lock); 884 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 885 mtx_unlock(&xsoftc.xpt_lock); 886 printf("xpt_init: xpt_bus_register failed with status %#x," 887 " failing attach\n", status); 888 return (EINVAL); 889 } 890 mtx_unlock(&xsoftc.xpt_lock); 891 892 /* 893 * Looking at the XPT from the SIM layer, the XPT is 894 * the equivelent of a peripheral driver. Allocate 895 * a peripheral driver entry for us. 896 */ 897 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 898 CAM_TARGET_WILDCARD, 899 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 900 mtx_unlock(&xsoftc.xpt_lock); 901 printf("xpt_init: xpt_create_path failed with status %#x," 902 " failing attach\n", status); 903 return (EINVAL); 904 } 905 xpt_path_lock(path); 906 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 907 path, NULL, 0, xpt_sim); 908 xpt_path_unlock(path); 909 xpt_free_path(path); 910 911 if (cam_num_doneqs < 1) 912 cam_num_doneqs = 1 + mp_ncpus / 6; 913 else if (cam_num_doneqs > MAXCPU) 914 cam_num_doneqs = MAXCPU; 915 for (i = 0; i < cam_num_doneqs; i++) { 916 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 917 MTX_DEF); 918 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 919 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 920 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 921 if (error != 0) { 922 cam_num_doneqs = i; 923 break; 924 } 925 } 926 if (cam_num_doneqs < 1) { 927 printf("xpt_init: Cannot init completion queues " 928 "- failing attach\n"); 929 return (ENOMEM); 930 } 931 /* 932 * Register a callback for when interrupts are enabled. 933 */ 934 xsoftc.xpt_config_hook = 935 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 936 M_CAMXPT, M_NOWAIT | M_ZERO); 937 if (xsoftc.xpt_config_hook == NULL) { 938 printf("xpt_init: Cannot malloc config hook " 939 "- failing attach\n"); 940 return (ENOMEM); 941 } 942 xsoftc.xpt_config_hook->ich_func = xpt_config; 943 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 944 free (xsoftc.xpt_config_hook, M_CAMXPT); 945 printf("xpt_init: config_intrhook_establish failed " 946 "- failing attach\n"); 947 } 948 949 return (0); 950} 951 952static cam_status 953xptregister(struct cam_periph *periph, void *arg) 954{ 955 struct cam_sim *xpt_sim; 956 957 if (periph == NULL) { 958 printf("xptregister: periph was NULL!!\n"); 959 return(CAM_REQ_CMP_ERR); 960 } 961 962 xpt_sim = (struct cam_sim *)arg; 963 xpt_sim->softc = periph; 964 xpt_periph = periph; 965 periph->softc = NULL; 966 967 return(CAM_REQ_CMP); 968} 969 970int32_t 971xpt_add_periph(struct cam_periph *periph) 972{ 973 struct cam_ed *device; 974 int32_t status; 975 976 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 977 device = periph->path->device; 978 status = CAM_REQ_CMP; 979 if (device != NULL) { 980 mtx_lock(&device->target->bus->eb_mtx); 981 device->generation++; 982 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 983 mtx_unlock(&device->target->bus->eb_mtx); 984 } 985 986 return (status); 987} 988 989void 990xpt_remove_periph(struct cam_periph *periph) 991{ 992 struct cam_ed *device; 993 994 device = periph->path->device; 995 if (device != NULL) { 996 mtx_lock(&device->target->bus->eb_mtx); 997 device->generation++; 998 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 999 mtx_unlock(&device->target->bus->eb_mtx); 1000 } 1001} 1002 1003 1004void 1005xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1006{ 1007 struct cam_path *path = periph->path; 1008 1009 cam_periph_assert(periph, MA_OWNED); 1010 periph->flags |= CAM_PERIPH_ANNOUNCED; 1011 1012 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1013 periph->periph_name, periph->unit_number, 1014 path->bus->sim->sim_name, 1015 path->bus->sim->unit_number, 1016 path->bus->sim->bus_id, 1017 path->bus->path_id, 1018 path->target->target_id, 1019 (uintmax_t)path->device->lun_id); 1020 printf("%s%d: ", periph->periph_name, periph->unit_number); 1021 if (path->device->protocol == PROTO_SCSI) 1022 scsi_print_inquiry(&path->device->inq_data); 1023 else if (path->device->protocol == PROTO_ATA || 1024 path->device->protocol == PROTO_SATAPM) 1025 ata_print_ident(&path->device->ident_data); 1026 else if (path->device->protocol == PROTO_SEMB) 1027 semb_print_ident( 1028 (struct sep_identify_data *)&path->device->ident_data); 1029 else 1030 printf("Unknown protocol device\n"); 1031 if (path->device->serial_num_len > 0) { 1032 /* Don't wrap the screen - print only the first 60 chars */ 1033 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1034 periph->unit_number, path->device->serial_num); 1035 } 1036 /* Announce transport details. */ 1037 (*(path->bus->xport->announce))(periph); 1038 /* Announce command queueing. */ 1039 if (path->device->inq_flags & SID_CmdQue 1040 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1041 printf("%s%d: Command Queueing enabled\n", 1042 periph->periph_name, periph->unit_number); 1043 } 1044 /* Announce caller's details if they've passed in. */ 1045 if (announce_string != NULL) 1046 printf("%s%d: %s\n", periph->periph_name, 1047 periph->unit_number, announce_string); 1048} 1049 1050void 1051xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1052{ 1053 if (quirks != 0) { 1054 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1055 periph->unit_number, quirks, bit_string); 1056 } 1057} 1058 1059void 1060xpt_denounce_periph(struct cam_periph *periph) 1061{ 1062 struct cam_path *path = periph->path; 1063 1064 cam_periph_assert(periph, MA_OWNED); 1065 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1066 periph->periph_name, periph->unit_number, 1067 path->bus->sim->sim_name, 1068 path->bus->sim->unit_number, 1069 path->bus->sim->bus_id, 1070 path->bus->path_id, 1071 path->target->target_id, 1072 (uintmax_t)path->device->lun_id); 1073 printf("%s%d: ", periph->periph_name, periph->unit_number); 1074 if (path->device->protocol == PROTO_SCSI) 1075 scsi_print_inquiry_short(&path->device->inq_data); 1076 else if (path->device->protocol == PROTO_ATA || 1077 path->device->protocol == PROTO_SATAPM) 1078 ata_print_ident_short(&path->device->ident_data); 1079 else if (path->device->protocol == PROTO_SEMB) 1080 semb_print_ident_short( 1081 (struct sep_identify_data *)&path->device->ident_data); 1082 else 1083 printf("Unknown protocol device"); 1084 if (path->device->serial_num_len > 0) 1085 printf(" s/n %.60s", path->device->serial_num); 1086 printf(" detached\n"); 1087} 1088 1089 1090int 1091xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1092{ 1093 int ret = -1, l; 1094 struct ccb_dev_advinfo cdai; 1095 struct scsi_vpd_id_descriptor *idd; 1096 1097 xpt_path_assert(path, MA_OWNED); 1098 1099 memset(&cdai, 0, sizeof(cdai)); 1100 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1101 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1102 cdai.bufsiz = len; 1103 1104 if (!strcmp(attr, "GEOM::ident")) 1105 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1106 else if (!strcmp(attr, "GEOM::physpath")) 1107 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1108 else if (strcmp(attr, "GEOM::lunid") == 0 || 1109 strcmp(attr, "GEOM::lunname") == 0) { 1110 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1111 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1112 } else 1113 goto out; 1114 1115 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO); 1116 if (cdai.buf == NULL) { 1117 ret = ENOMEM; 1118 goto out; 1119 } 1120 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1121 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1122 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1123 if (cdai.provsiz == 0) 1124 goto out; 1125 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) { 1126 if (strcmp(attr, "GEOM::lunid") == 0) { 1127 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1128 cdai.provsiz, scsi_devid_is_lun_naa); 1129 if (idd == NULL) 1130 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1131 cdai.provsiz, scsi_devid_is_lun_eui64); 1132 } else 1133 idd = NULL; 1134 if (idd == NULL) 1135 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1136 cdai.provsiz, scsi_devid_is_lun_t10); 1137 if (idd == NULL) 1138 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1139 cdai.provsiz, scsi_devid_is_lun_name); 1140 if (idd == NULL) 1141 goto out; 1142 ret = 0; 1143 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII || 1144 (idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) { 1145 l = strnlen(idd->identifier, idd->length); 1146 if (l < len) { 1147 bcopy(idd->identifier, buf, l); 1148 buf[l] = 0; 1149 } else 1150 ret = EFAULT; 1151 } else { 1152 if (idd->length * 2 < len) { 1153 for (l = 0; l < idd->length; l++) 1154 sprintf(buf + l * 2, "%02x", 1155 idd->identifier[l]); 1156 } else 1157 ret = EFAULT; 1158 } 1159 } else { 1160 ret = 0; 1161 if (strlcpy(buf, cdai.buf, len) >= len) 1162 ret = EFAULT; 1163 } 1164 1165out: 1166 if (cdai.buf != NULL) 1167 free(cdai.buf, M_CAMXPT); 1168 return ret; 1169} 1170 1171static dev_match_ret 1172xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1173 struct cam_eb *bus) 1174{ 1175 dev_match_ret retval; 1176 int i; 1177 1178 retval = DM_RET_NONE; 1179 1180 /* 1181 * If we aren't given something to match against, that's an error. 1182 */ 1183 if (bus == NULL) 1184 return(DM_RET_ERROR); 1185 1186 /* 1187 * If there are no match entries, then this bus matches no 1188 * matter what. 1189 */ 1190 if ((patterns == NULL) || (num_patterns == 0)) 1191 return(DM_RET_DESCEND | DM_RET_COPY); 1192 1193 for (i = 0; i < num_patterns; i++) { 1194 struct bus_match_pattern *cur_pattern; 1195 1196 /* 1197 * If the pattern in question isn't for a bus node, we 1198 * aren't interested. However, we do indicate to the 1199 * calling routine that we should continue descending the 1200 * tree, since the user wants to match against lower-level 1201 * EDT elements. 1202 */ 1203 if (patterns[i].type != DEV_MATCH_BUS) { 1204 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1205 retval |= DM_RET_DESCEND; 1206 continue; 1207 } 1208 1209 cur_pattern = &patterns[i].pattern.bus_pattern; 1210 1211 /* 1212 * If they want to match any bus node, we give them any 1213 * device node. 1214 */ 1215 if (cur_pattern->flags == BUS_MATCH_ANY) { 1216 /* set the copy flag */ 1217 retval |= DM_RET_COPY; 1218 1219 /* 1220 * If we've already decided on an action, go ahead 1221 * and return. 1222 */ 1223 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1224 return(retval); 1225 } 1226 1227 /* 1228 * Not sure why someone would do this... 1229 */ 1230 if (cur_pattern->flags == BUS_MATCH_NONE) 1231 continue; 1232 1233 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1234 && (cur_pattern->path_id != bus->path_id)) 1235 continue; 1236 1237 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1238 && (cur_pattern->bus_id != bus->sim->bus_id)) 1239 continue; 1240 1241 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1242 && (cur_pattern->unit_number != bus->sim->unit_number)) 1243 continue; 1244 1245 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1246 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1247 DEV_IDLEN) != 0)) 1248 continue; 1249 1250 /* 1251 * If we get to this point, the user definitely wants 1252 * information on this bus. So tell the caller to copy the 1253 * data out. 1254 */ 1255 retval |= DM_RET_COPY; 1256 1257 /* 1258 * If the return action has been set to descend, then we 1259 * know that we've already seen a non-bus matching 1260 * expression, therefore we need to further descend the tree. 1261 * This won't change by continuing around the loop, so we 1262 * go ahead and return. If we haven't seen a non-bus 1263 * matching expression, we keep going around the loop until 1264 * we exhaust the matching expressions. We'll set the stop 1265 * flag once we fall out of the loop. 1266 */ 1267 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1268 return(retval); 1269 } 1270 1271 /* 1272 * If the return action hasn't been set to descend yet, that means 1273 * we haven't seen anything other than bus matching patterns. So 1274 * tell the caller to stop descending the tree -- the user doesn't 1275 * want to match against lower level tree elements. 1276 */ 1277 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1278 retval |= DM_RET_STOP; 1279 1280 return(retval); 1281} 1282 1283static dev_match_ret 1284xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1285 struct cam_ed *device) 1286{ 1287 dev_match_ret retval; 1288 int i; 1289 1290 retval = DM_RET_NONE; 1291 1292 /* 1293 * If we aren't given something to match against, that's an error. 1294 */ 1295 if (device == NULL) 1296 return(DM_RET_ERROR); 1297 1298 /* 1299 * If there are no match entries, then this device matches no 1300 * matter what. 1301 */ 1302 if ((patterns == NULL) || (num_patterns == 0)) 1303 return(DM_RET_DESCEND | DM_RET_COPY); 1304 1305 for (i = 0; i < num_patterns; i++) { 1306 struct device_match_pattern *cur_pattern; 1307 struct scsi_vpd_device_id *device_id_page; 1308 1309 /* 1310 * If the pattern in question isn't for a device node, we 1311 * aren't interested. 1312 */ 1313 if (patterns[i].type != DEV_MATCH_DEVICE) { 1314 if ((patterns[i].type == DEV_MATCH_PERIPH) 1315 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1316 retval |= DM_RET_DESCEND; 1317 continue; 1318 } 1319 1320 cur_pattern = &patterns[i].pattern.device_pattern; 1321 1322 /* Error out if mutually exclusive options are specified. */ 1323 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1324 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1325 return(DM_RET_ERROR); 1326 1327 /* 1328 * If they want to match any device node, we give them any 1329 * device node. 1330 */ 1331 if (cur_pattern->flags == DEV_MATCH_ANY) 1332 goto copy_dev_node; 1333 1334 /* 1335 * Not sure why someone would do this... 1336 */ 1337 if (cur_pattern->flags == DEV_MATCH_NONE) 1338 continue; 1339 1340 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1341 && (cur_pattern->path_id != device->target->bus->path_id)) 1342 continue; 1343 1344 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1345 && (cur_pattern->target_id != device->target->target_id)) 1346 continue; 1347 1348 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1349 && (cur_pattern->target_lun != device->lun_id)) 1350 continue; 1351 1352 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1353 && (cam_quirkmatch((caddr_t)&device->inq_data, 1354 (caddr_t)&cur_pattern->data.inq_pat, 1355 1, sizeof(cur_pattern->data.inq_pat), 1356 scsi_static_inquiry_match) == NULL)) 1357 continue; 1358 1359 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1360 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1361 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1362 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1363 device->device_id_len 1364 - SVPD_DEVICE_ID_HDR_LEN, 1365 cur_pattern->data.devid_pat.id, 1366 cur_pattern->data.devid_pat.id_len) != 0)) 1367 continue; 1368 1369copy_dev_node: 1370 /* 1371 * If we get to this point, the user definitely wants 1372 * information on this device. So tell the caller to copy 1373 * the data out. 1374 */ 1375 retval |= DM_RET_COPY; 1376 1377 /* 1378 * If the return action has been set to descend, then we 1379 * know that we've already seen a peripheral matching 1380 * expression, therefore we need to further descend the tree. 1381 * This won't change by continuing around the loop, so we 1382 * go ahead and return. If we haven't seen a peripheral 1383 * matching expression, we keep going around the loop until 1384 * we exhaust the matching expressions. We'll set the stop 1385 * flag once we fall out of the loop. 1386 */ 1387 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1388 return(retval); 1389 } 1390 1391 /* 1392 * If the return action hasn't been set to descend yet, that means 1393 * we haven't seen any peripheral matching patterns. So tell the 1394 * caller to stop descending the tree -- the user doesn't want to 1395 * match against lower level tree elements. 1396 */ 1397 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1398 retval |= DM_RET_STOP; 1399 1400 return(retval); 1401} 1402 1403/* 1404 * Match a single peripheral against any number of match patterns. 1405 */ 1406static dev_match_ret 1407xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1408 struct cam_periph *periph) 1409{ 1410 dev_match_ret retval; 1411 int i; 1412 1413 /* 1414 * If we aren't given something to match against, that's an error. 1415 */ 1416 if (periph == NULL) 1417 return(DM_RET_ERROR); 1418 1419 /* 1420 * If there are no match entries, then this peripheral matches no 1421 * matter what. 1422 */ 1423 if ((patterns == NULL) || (num_patterns == 0)) 1424 return(DM_RET_STOP | DM_RET_COPY); 1425 1426 /* 1427 * There aren't any nodes below a peripheral node, so there's no 1428 * reason to descend the tree any further. 1429 */ 1430 retval = DM_RET_STOP; 1431 1432 for (i = 0; i < num_patterns; i++) { 1433 struct periph_match_pattern *cur_pattern; 1434 1435 /* 1436 * If the pattern in question isn't for a peripheral, we 1437 * aren't interested. 1438 */ 1439 if (patterns[i].type != DEV_MATCH_PERIPH) 1440 continue; 1441 1442 cur_pattern = &patterns[i].pattern.periph_pattern; 1443 1444 /* 1445 * If they want to match on anything, then we will do so. 1446 */ 1447 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1448 /* set the copy flag */ 1449 retval |= DM_RET_COPY; 1450 1451 /* 1452 * We've already set the return action to stop, 1453 * since there are no nodes below peripherals in 1454 * the tree. 1455 */ 1456 return(retval); 1457 } 1458 1459 /* 1460 * Not sure why someone would do this... 1461 */ 1462 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1463 continue; 1464 1465 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1466 && (cur_pattern->path_id != periph->path->bus->path_id)) 1467 continue; 1468 1469 /* 1470 * For the target and lun id's, we have to make sure the 1471 * target and lun pointers aren't NULL. The xpt peripheral 1472 * has a wildcard target and device. 1473 */ 1474 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1475 && ((periph->path->target == NULL) 1476 ||(cur_pattern->target_id != periph->path->target->target_id))) 1477 continue; 1478 1479 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1480 && ((periph->path->device == NULL) 1481 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1482 continue; 1483 1484 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1485 && (cur_pattern->unit_number != periph->unit_number)) 1486 continue; 1487 1488 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1489 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1490 DEV_IDLEN) != 0)) 1491 continue; 1492 1493 /* 1494 * If we get to this point, the user definitely wants 1495 * information on this peripheral. So tell the caller to 1496 * copy the data out. 1497 */ 1498 retval |= DM_RET_COPY; 1499 1500 /* 1501 * The return action has already been set to stop, since 1502 * peripherals don't have any nodes below them in the EDT. 1503 */ 1504 return(retval); 1505 } 1506 1507 /* 1508 * If we get to this point, the peripheral that was passed in 1509 * doesn't match any of the patterns. 1510 */ 1511 return(retval); 1512} 1513 1514static int 1515xptedtbusfunc(struct cam_eb *bus, void *arg) 1516{ 1517 struct ccb_dev_match *cdm; 1518 struct cam_et *target; 1519 dev_match_ret retval; 1520 1521 cdm = (struct ccb_dev_match *)arg; 1522 1523 /* 1524 * If our position is for something deeper in the tree, that means 1525 * that we've already seen this node. So, we keep going down. 1526 */ 1527 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1528 && (cdm->pos.cookie.bus == bus) 1529 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1530 && (cdm->pos.cookie.target != NULL)) 1531 retval = DM_RET_DESCEND; 1532 else 1533 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1534 1535 /* 1536 * If we got an error, bail out of the search. 1537 */ 1538 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1539 cdm->status = CAM_DEV_MATCH_ERROR; 1540 return(0); 1541 } 1542 1543 /* 1544 * If the copy flag is set, copy this bus out. 1545 */ 1546 if (retval & DM_RET_COPY) { 1547 int spaceleft, j; 1548 1549 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1550 sizeof(struct dev_match_result)); 1551 1552 /* 1553 * If we don't have enough space to put in another 1554 * match result, save our position and tell the 1555 * user there are more devices to check. 1556 */ 1557 if (spaceleft < sizeof(struct dev_match_result)) { 1558 bzero(&cdm->pos, sizeof(cdm->pos)); 1559 cdm->pos.position_type = 1560 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1561 1562 cdm->pos.cookie.bus = bus; 1563 cdm->pos.generations[CAM_BUS_GENERATION]= 1564 xsoftc.bus_generation; 1565 cdm->status = CAM_DEV_MATCH_MORE; 1566 return(0); 1567 } 1568 j = cdm->num_matches; 1569 cdm->num_matches++; 1570 cdm->matches[j].type = DEV_MATCH_BUS; 1571 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1572 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1573 cdm->matches[j].result.bus_result.unit_number = 1574 bus->sim->unit_number; 1575 strncpy(cdm->matches[j].result.bus_result.dev_name, 1576 bus->sim->sim_name, DEV_IDLEN); 1577 } 1578 1579 /* 1580 * If the user is only interested in busses, there's no 1581 * reason to descend to the next level in the tree. 1582 */ 1583 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1584 return(1); 1585 1586 /* 1587 * If there is a target generation recorded, check it to 1588 * make sure the target list hasn't changed. 1589 */ 1590 mtx_lock(&bus->eb_mtx); 1591 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1592 && (cdm->pos.cookie.bus == bus) 1593 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1594 && (cdm->pos.cookie.target != NULL)) { 1595 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1596 bus->generation)) { 1597 mtx_unlock(&bus->eb_mtx); 1598 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1599 return (0); 1600 } 1601 target = (struct cam_et *)cdm->pos.cookie.target; 1602 target->refcount++; 1603 } else 1604 target = NULL; 1605 mtx_unlock(&bus->eb_mtx); 1606 1607 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1608} 1609 1610static int 1611xptedttargetfunc(struct cam_et *target, void *arg) 1612{ 1613 struct ccb_dev_match *cdm; 1614 struct cam_eb *bus; 1615 struct cam_ed *device; 1616 1617 cdm = (struct ccb_dev_match *)arg; 1618 bus = target->bus; 1619 1620 /* 1621 * If there is a device list generation recorded, check it to 1622 * make sure the device list hasn't changed. 1623 */ 1624 mtx_lock(&bus->eb_mtx); 1625 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1626 && (cdm->pos.cookie.bus == bus) 1627 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1628 && (cdm->pos.cookie.target == target) 1629 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1630 && (cdm->pos.cookie.device != NULL)) { 1631 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1632 target->generation) { 1633 mtx_unlock(&bus->eb_mtx); 1634 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1635 return(0); 1636 } 1637 device = (struct cam_ed *)cdm->pos.cookie.device; 1638 device->refcount++; 1639 } else 1640 device = NULL; 1641 mtx_unlock(&bus->eb_mtx); 1642 1643 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1644} 1645 1646static int 1647xptedtdevicefunc(struct cam_ed *device, void *arg) 1648{ 1649 struct cam_eb *bus; 1650 struct cam_periph *periph; 1651 struct ccb_dev_match *cdm; 1652 dev_match_ret retval; 1653 1654 cdm = (struct ccb_dev_match *)arg; 1655 bus = device->target->bus; 1656 1657 /* 1658 * If our position is for something deeper in the tree, that means 1659 * that we've already seen this node. So, we keep going down. 1660 */ 1661 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1662 && (cdm->pos.cookie.device == device) 1663 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1664 && (cdm->pos.cookie.periph != NULL)) 1665 retval = DM_RET_DESCEND; 1666 else 1667 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1668 device); 1669 1670 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1671 cdm->status = CAM_DEV_MATCH_ERROR; 1672 return(0); 1673 } 1674 1675 /* 1676 * If the copy flag is set, copy this device out. 1677 */ 1678 if (retval & DM_RET_COPY) { 1679 int spaceleft, j; 1680 1681 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1682 sizeof(struct dev_match_result)); 1683 1684 /* 1685 * If we don't have enough space to put in another 1686 * match result, save our position and tell the 1687 * user there are more devices to check. 1688 */ 1689 if (spaceleft < sizeof(struct dev_match_result)) { 1690 bzero(&cdm->pos, sizeof(cdm->pos)); 1691 cdm->pos.position_type = 1692 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1693 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1694 1695 cdm->pos.cookie.bus = device->target->bus; 1696 cdm->pos.generations[CAM_BUS_GENERATION]= 1697 xsoftc.bus_generation; 1698 cdm->pos.cookie.target = device->target; 1699 cdm->pos.generations[CAM_TARGET_GENERATION] = 1700 device->target->bus->generation; 1701 cdm->pos.cookie.device = device; 1702 cdm->pos.generations[CAM_DEV_GENERATION] = 1703 device->target->generation; 1704 cdm->status = CAM_DEV_MATCH_MORE; 1705 return(0); 1706 } 1707 j = cdm->num_matches; 1708 cdm->num_matches++; 1709 cdm->matches[j].type = DEV_MATCH_DEVICE; 1710 cdm->matches[j].result.device_result.path_id = 1711 device->target->bus->path_id; 1712 cdm->matches[j].result.device_result.target_id = 1713 device->target->target_id; 1714 cdm->matches[j].result.device_result.target_lun = 1715 device->lun_id; 1716 cdm->matches[j].result.device_result.protocol = 1717 device->protocol; 1718 bcopy(&device->inq_data, 1719 &cdm->matches[j].result.device_result.inq_data, 1720 sizeof(struct scsi_inquiry_data)); 1721 bcopy(&device->ident_data, 1722 &cdm->matches[j].result.device_result.ident_data, 1723 sizeof(struct ata_params)); 1724 1725 /* Let the user know whether this device is unconfigured */ 1726 if (device->flags & CAM_DEV_UNCONFIGURED) 1727 cdm->matches[j].result.device_result.flags = 1728 DEV_RESULT_UNCONFIGURED; 1729 else 1730 cdm->matches[j].result.device_result.flags = 1731 DEV_RESULT_NOFLAG; 1732 } 1733 1734 /* 1735 * If the user isn't interested in peripherals, don't descend 1736 * the tree any further. 1737 */ 1738 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1739 return(1); 1740 1741 /* 1742 * If there is a peripheral list generation recorded, make sure 1743 * it hasn't changed. 1744 */ 1745 xpt_lock_buses(); 1746 mtx_lock(&bus->eb_mtx); 1747 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1748 && (cdm->pos.cookie.bus == bus) 1749 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1750 && (cdm->pos.cookie.target == device->target) 1751 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1752 && (cdm->pos.cookie.device == device) 1753 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1754 && (cdm->pos.cookie.periph != NULL)) { 1755 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1756 device->generation) { 1757 mtx_unlock(&bus->eb_mtx); 1758 xpt_unlock_buses(); 1759 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1760 return(0); 1761 } 1762 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1763 periph->refcount++; 1764 } else 1765 periph = NULL; 1766 mtx_unlock(&bus->eb_mtx); 1767 xpt_unlock_buses(); 1768 1769 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1770} 1771 1772static int 1773xptedtperiphfunc(struct cam_periph *periph, void *arg) 1774{ 1775 struct ccb_dev_match *cdm; 1776 dev_match_ret retval; 1777 1778 cdm = (struct ccb_dev_match *)arg; 1779 1780 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1781 1782 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1783 cdm->status = CAM_DEV_MATCH_ERROR; 1784 return(0); 1785 } 1786 1787 /* 1788 * If the copy flag is set, copy this peripheral out. 1789 */ 1790 if (retval & DM_RET_COPY) { 1791 int spaceleft, j; 1792 1793 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1794 sizeof(struct dev_match_result)); 1795 1796 /* 1797 * If we don't have enough space to put in another 1798 * match result, save our position and tell the 1799 * user there are more devices to check. 1800 */ 1801 if (spaceleft < sizeof(struct dev_match_result)) { 1802 bzero(&cdm->pos, sizeof(cdm->pos)); 1803 cdm->pos.position_type = 1804 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1805 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1806 CAM_DEV_POS_PERIPH; 1807 1808 cdm->pos.cookie.bus = periph->path->bus; 1809 cdm->pos.generations[CAM_BUS_GENERATION]= 1810 xsoftc.bus_generation; 1811 cdm->pos.cookie.target = periph->path->target; 1812 cdm->pos.generations[CAM_TARGET_GENERATION] = 1813 periph->path->bus->generation; 1814 cdm->pos.cookie.device = periph->path->device; 1815 cdm->pos.generations[CAM_DEV_GENERATION] = 1816 periph->path->target->generation; 1817 cdm->pos.cookie.periph = periph; 1818 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1819 periph->path->device->generation; 1820 cdm->status = CAM_DEV_MATCH_MORE; 1821 return(0); 1822 } 1823 1824 j = cdm->num_matches; 1825 cdm->num_matches++; 1826 cdm->matches[j].type = DEV_MATCH_PERIPH; 1827 cdm->matches[j].result.periph_result.path_id = 1828 periph->path->bus->path_id; 1829 cdm->matches[j].result.periph_result.target_id = 1830 periph->path->target->target_id; 1831 cdm->matches[j].result.periph_result.target_lun = 1832 periph->path->device->lun_id; 1833 cdm->matches[j].result.periph_result.unit_number = 1834 periph->unit_number; 1835 strncpy(cdm->matches[j].result.periph_result.periph_name, 1836 periph->periph_name, DEV_IDLEN); 1837 } 1838 1839 return(1); 1840} 1841 1842static int 1843xptedtmatch(struct ccb_dev_match *cdm) 1844{ 1845 struct cam_eb *bus; 1846 int ret; 1847 1848 cdm->num_matches = 0; 1849 1850 /* 1851 * Check the bus list generation. If it has changed, the user 1852 * needs to reset everything and start over. 1853 */ 1854 xpt_lock_buses(); 1855 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1856 && (cdm->pos.cookie.bus != NULL)) { 1857 if (cdm->pos.generations[CAM_BUS_GENERATION] != 1858 xsoftc.bus_generation) { 1859 xpt_unlock_buses(); 1860 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1861 return(0); 1862 } 1863 bus = (struct cam_eb *)cdm->pos.cookie.bus; 1864 bus->refcount++; 1865 } else 1866 bus = NULL; 1867 xpt_unlock_buses(); 1868 1869 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 1870 1871 /* 1872 * If we get back 0, that means that we had to stop before fully 1873 * traversing the EDT. It also means that one of the subroutines 1874 * has set the status field to the proper value. If we get back 1, 1875 * we've fully traversed the EDT and copied out any matching entries. 1876 */ 1877 if (ret == 1) 1878 cdm->status = CAM_DEV_MATCH_LAST; 1879 1880 return(ret); 1881} 1882 1883static int 1884xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1885{ 1886 struct cam_periph *periph; 1887 struct ccb_dev_match *cdm; 1888 1889 cdm = (struct ccb_dev_match *)arg; 1890 1891 xpt_lock_buses(); 1892 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1893 && (cdm->pos.cookie.pdrv == pdrv) 1894 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1895 && (cdm->pos.cookie.periph != NULL)) { 1896 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1897 (*pdrv)->generation) { 1898 xpt_unlock_buses(); 1899 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1900 return(0); 1901 } 1902 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1903 periph->refcount++; 1904 } else 1905 periph = NULL; 1906 xpt_unlock_buses(); 1907 1908 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 1909} 1910 1911static int 1912xptplistperiphfunc(struct cam_periph *periph, void *arg) 1913{ 1914 struct ccb_dev_match *cdm; 1915 dev_match_ret retval; 1916 1917 cdm = (struct ccb_dev_match *)arg; 1918 1919 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1920 1921 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1922 cdm->status = CAM_DEV_MATCH_ERROR; 1923 return(0); 1924 } 1925 1926 /* 1927 * If the copy flag is set, copy this peripheral out. 1928 */ 1929 if (retval & DM_RET_COPY) { 1930 int spaceleft, j; 1931 1932 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1933 sizeof(struct dev_match_result)); 1934 1935 /* 1936 * If we don't have enough space to put in another 1937 * match result, save our position and tell the 1938 * user there are more devices to check. 1939 */ 1940 if (spaceleft < sizeof(struct dev_match_result)) { 1941 struct periph_driver **pdrv; 1942 1943 pdrv = NULL; 1944 bzero(&cdm->pos, sizeof(cdm->pos)); 1945 cdm->pos.position_type = 1946 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1947 CAM_DEV_POS_PERIPH; 1948 1949 /* 1950 * This may look a bit non-sensical, but it is 1951 * actually quite logical. There are very few 1952 * peripheral drivers, and bloating every peripheral 1953 * structure with a pointer back to its parent 1954 * peripheral driver linker set entry would cost 1955 * more in the long run than doing this quick lookup. 1956 */ 1957 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 1958 if (strcmp((*pdrv)->driver_name, 1959 periph->periph_name) == 0) 1960 break; 1961 } 1962 1963 if (*pdrv == NULL) { 1964 cdm->status = CAM_DEV_MATCH_ERROR; 1965 return(0); 1966 } 1967 1968 cdm->pos.cookie.pdrv = pdrv; 1969 /* 1970 * The periph generation slot does double duty, as 1971 * does the periph pointer slot. They are used for 1972 * both edt and pdrv lookups and positioning. 1973 */ 1974 cdm->pos.cookie.periph = periph; 1975 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1976 (*pdrv)->generation; 1977 cdm->status = CAM_DEV_MATCH_MORE; 1978 return(0); 1979 } 1980 1981 j = cdm->num_matches; 1982 cdm->num_matches++; 1983 cdm->matches[j].type = DEV_MATCH_PERIPH; 1984 cdm->matches[j].result.periph_result.path_id = 1985 periph->path->bus->path_id; 1986 1987 /* 1988 * The transport layer peripheral doesn't have a target or 1989 * lun. 1990 */ 1991 if (periph->path->target) 1992 cdm->matches[j].result.periph_result.target_id = 1993 periph->path->target->target_id; 1994 else 1995 cdm->matches[j].result.periph_result.target_id = 1996 CAM_TARGET_WILDCARD; 1997 1998 if (periph->path->device) 1999 cdm->matches[j].result.periph_result.target_lun = 2000 periph->path->device->lun_id; 2001 else 2002 cdm->matches[j].result.periph_result.target_lun = 2003 CAM_LUN_WILDCARD; 2004 2005 cdm->matches[j].result.periph_result.unit_number = 2006 periph->unit_number; 2007 strncpy(cdm->matches[j].result.periph_result.periph_name, 2008 periph->periph_name, DEV_IDLEN); 2009 } 2010 2011 return(1); 2012} 2013 2014static int 2015xptperiphlistmatch(struct ccb_dev_match *cdm) 2016{ 2017 int ret; 2018 2019 cdm->num_matches = 0; 2020 2021 /* 2022 * At this point in the edt traversal function, we check the bus 2023 * list generation to make sure that no busses have been added or 2024 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2025 * For the peripheral driver list traversal function, however, we 2026 * don't have to worry about new peripheral driver types coming or 2027 * going; they're in a linker set, and therefore can't change 2028 * without a recompile. 2029 */ 2030 2031 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2032 && (cdm->pos.cookie.pdrv != NULL)) 2033 ret = xptpdrvtraverse( 2034 (struct periph_driver **)cdm->pos.cookie.pdrv, 2035 xptplistpdrvfunc, cdm); 2036 else 2037 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2038 2039 /* 2040 * If we get back 0, that means that we had to stop before fully 2041 * traversing the peripheral driver tree. It also means that one of 2042 * the subroutines has set the status field to the proper value. If 2043 * we get back 1, we've fully traversed the EDT and copied out any 2044 * matching entries. 2045 */ 2046 if (ret == 1) 2047 cdm->status = CAM_DEV_MATCH_LAST; 2048 2049 return(ret); 2050} 2051 2052static int 2053xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2054{ 2055 struct cam_eb *bus, *next_bus; 2056 int retval; 2057 2058 retval = 1; 2059 if (start_bus) 2060 bus = start_bus; 2061 else { 2062 xpt_lock_buses(); 2063 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2064 if (bus == NULL) { 2065 xpt_unlock_buses(); 2066 return (retval); 2067 } 2068 bus->refcount++; 2069 xpt_unlock_buses(); 2070 } 2071 for (; bus != NULL; bus = next_bus) { 2072 retval = tr_func(bus, arg); 2073 if (retval == 0) { 2074 xpt_release_bus(bus); 2075 break; 2076 } 2077 xpt_lock_buses(); 2078 next_bus = TAILQ_NEXT(bus, links); 2079 if (next_bus) 2080 next_bus->refcount++; 2081 xpt_unlock_buses(); 2082 xpt_release_bus(bus); 2083 } 2084 return(retval); 2085} 2086 2087static int 2088xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2089 xpt_targetfunc_t *tr_func, void *arg) 2090{ 2091 struct cam_et *target, *next_target; 2092 int retval; 2093 2094 retval = 1; 2095 if (start_target) 2096 target = start_target; 2097 else { 2098 mtx_lock(&bus->eb_mtx); 2099 target = TAILQ_FIRST(&bus->et_entries); 2100 if (target == NULL) { 2101 mtx_unlock(&bus->eb_mtx); 2102 return (retval); 2103 } 2104 target->refcount++; 2105 mtx_unlock(&bus->eb_mtx); 2106 } 2107 for (; target != NULL; target = next_target) { 2108 retval = tr_func(target, arg); 2109 if (retval == 0) { 2110 xpt_release_target(target); 2111 break; 2112 } 2113 mtx_lock(&bus->eb_mtx); 2114 next_target = TAILQ_NEXT(target, links); 2115 if (next_target) 2116 next_target->refcount++; 2117 mtx_unlock(&bus->eb_mtx); 2118 xpt_release_target(target); 2119 } 2120 return(retval); 2121} 2122 2123static int 2124xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2125 xpt_devicefunc_t *tr_func, void *arg) 2126{ 2127 struct cam_eb *bus; 2128 struct cam_ed *device, *next_device; 2129 int retval; 2130 2131 retval = 1; 2132 bus = target->bus; 2133 if (start_device) 2134 device = start_device; 2135 else { 2136 mtx_lock(&bus->eb_mtx); 2137 device = TAILQ_FIRST(&target->ed_entries); 2138 if (device == NULL) { 2139 mtx_unlock(&bus->eb_mtx); 2140 return (retval); 2141 } 2142 device->refcount++; 2143 mtx_unlock(&bus->eb_mtx); 2144 } 2145 for (; device != NULL; device = next_device) { 2146 mtx_lock(&device->device_mtx); 2147 retval = tr_func(device, arg); 2148 mtx_unlock(&device->device_mtx); 2149 if (retval == 0) { 2150 xpt_release_device(device); 2151 break; 2152 } 2153 mtx_lock(&bus->eb_mtx); 2154 next_device = TAILQ_NEXT(device, links); 2155 if (next_device) 2156 next_device->refcount++; 2157 mtx_unlock(&bus->eb_mtx); 2158 xpt_release_device(device); 2159 } 2160 return(retval); 2161} 2162 2163static int 2164xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2165 xpt_periphfunc_t *tr_func, void *arg) 2166{ 2167 struct cam_eb *bus; 2168 struct cam_periph *periph, *next_periph; 2169 int retval; 2170 2171 retval = 1; 2172 2173 bus = device->target->bus; 2174 if (start_periph) 2175 periph = start_periph; 2176 else { 2177 xpt_lock_buses(); 2178 mtx_lock(&bus->eb_mtx); 2179 periph = SLIST_FIRST(&device->periphs); 2180 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2181 periph = SLIST_NEXT(periph, periph_links); 2182 if (periph == NULL) { 2183 mtx_unlock(&bus->eb_mtx); 2184 xpt_unlock_buses(); 2185 return (retval); 2186 } 2187 periph->refcount++; 2188 mtx_unlock(&bus->eb_mtx); 2189 xpt_unlock_buses(); 2190 } 2191 for (; periph != NULL; periph = next_periph) { 2192 retval = tr_func(periph, arg); 2193 if (retval == 0) { 2194 cam_periph_release_locked(periph); 2195 break; 2196 } 2197 xpt_lock_buses(); 2198 mtx_lock(&bus->eb_mtx); 2199 next_periph = SLIST_NEXT(periph, periph_links); 2200 while (next_periph != NULL && 2201 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2202 next_periph = SLIST_NEXT(next_periph, periph_links); 2203 if (next_periph) 2204 next_periph->refcount++; 2205 mtx_unlock(&bus->eb_mtx); 2206 xpt_unlock_buses(); 2207 cam_periph_release_locked(periph); 2208 } 2209 return(retval); 2210} 2211 2212static int 2213xptpdrvtraverse(struct periph_driver **start_pdrv, 2214 xpt_pdrvfunc_t *tr_func, void *arg) 2215{ 2216 struct periph_driver **pdrv; 2217 int retval; 2218 2219 retval = 1; 2220 2221 /* 2222 * We don't traverse the peripheral driver list like we do the 2223 * other lists, because it is a linker set, and therefore cannot be 2224 * changed during runtime. If the peripheral driver list is ever 2225 * re-done to be something other than a linker set (i.e. it can 2226 * change while the system is running), the list traversal should 2227 * be modified to work like the other traversal functions. 2228 */ 2229 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2230 *pdrv != NULL; pdrv++) { 2231 retval = tr_func(pdrv, arg); 2232 2233 if (retval == 0) 2234 return(retval); 2235 } 2236 2237 return(retval); 2238} 2239 2240static int 2241xptpdperiphtraverse(struct periph_driver **pdrv, 2242 struct cam_periph *start_periph, 2243 xpt_periphfunc_t *tr_func, void *arg) 2244{ 2245 struct cam_periph *periph, *next_periph; 2246 int retval; 2247 2248 retval = 1; 2249 2250 if (start_periph) 2251 periph = start_periph; 2252 else { 2253 xpt_lock_buses(); 2254 periph = TAILQ_FIRST(&(*pdrv)->units); 2255 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2256 periph = TAILQ_NEXT(periph, unit_links); 2257 if (periph == NULL) { 2258 xpt_unlock_buses(); 2259 return (retval); 2260 } 2261 periph->refcount++; 2262 xpt_unlock_buses(); 2263 } 2264 for (; periph != NULL; periph = next_periph) { 2265 cam_periph_lock(periph); 2266 retval = tr_func(periph, arg); 2267 cam_periph_unlock(periph); 2268 if (retval == 0) { 2269 cam_periph_release(periph); 2270 break; 2271 } 2272 xpt_lock_buses(); 2273 next_periph = TAILQ_NEXT(periph, unit_links); 2274 while (next_periph != NULL && 2275 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2276 next_periph = TAILQ_NEXT(next_periph, unit_links); 2277 if (next_periph) 2278 next_periph->refcount++; 2279 xpt_unlock_buses(); 2280 cam_periph_release(periph); 2281 } 2282 return(retval); 2283} 2284 2285static int 2286xptdefbusfunc(struct cam_eb *bus, void *arg) 2287{ 2288 struct xpt_traverse_config *tr_config; 2289 2290 tr_config = (struct xpt_traverse_config *)arg; 2291 2292 if (tr_config->depth == XPT_DEPTH_BUS) { 2293 xpt_busfunc_t *tr_func; 2294 2295 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2296 2297 return(tr_func(bus, tr_config->tr_arg)); 2298 } else 2299 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2300} 2301 2302static int 2303xptdeftargetfunc(struct cam_et *target, void *arg) 2304{ 2305 struct xpt_traverse_config *tr_config; 2306 2307 tr_config = (struct xpt_traverse_config *)arg; 2308 2309 if (tr_config->depth == XPT_DEPTH_TARGET) { 2310 xpt_targetfunc_t *tr_func; 2311 2312 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2313 2314 return(tr_func(target, tr_config->tr_arg)); 2315 } else 2316 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2317} 2318 2319static int 2320xptdefdevicefunc(struct cam_ed *device, void *arg) 2321{ 2322 struct xpt_traverse_config *tr_config; 2323 2324 tr_config = (struct xpt_traverse_config *)arg; 2325 2326 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2327 xpt_devicefunc_t *tr_func; 2328 2329 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2330 2331 return(tr_func(device, tr_config->tr_arg)); 2332 } else 2333 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2334} 2335 2336static int 2337xptdefperiphfunc(struct cam_periph *periph, void *arg) 2338{ 2339 struct xpt_traverse_config *tr_config; 2340 xpt_periphfunc_t *tr_func; 2341 2342 tr_config = (struct xpt_traverse_config *)arg; 2343 2344 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2345 2346 /* 2347 * Unlike the other default functions, we don't check for depth 2348 * here. The peripheral driver level is the last level in the EDT, 2349 * so if we're here, we should execute the function in question. 2350 */ 2351 return(tr_func(periph, tr_config->tr_arg)); 2352} 2353 2354/* 2355 * Execute the given function for every bus in the EDT. 2356 */ 2357static int 2358xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2359{ 2360 struct xpt_traverse_config tr_config; 2361 2362 tr_config.depth = XPT_DEPTH_BUS; 2363 tr_config.tr_func = tr_func; 2364 tr_config.tr_arg = arg; 2365 2366 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2367} 2368 2369/* 2370 * Execute the given function for every device in the EDT. 2371 */ 2372static int 2373xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2374{ 2375 struct xpt_traverse_config tr_config; 2376 2377 tr_config.depth = XPT_DEPTH_DEVICE; 2378 tr_config.tr_func = tr_func; 2379 tr_config.tr_arg = arg; 2380 2381 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2382} 2383 2384static int 2385xptsetasyncfunc(struct cam_ed *device, void *arg) 2386{ 2387 struct cam_path path; 2388 struct ccb_getdev cgd; 2389 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2390 2391 /* 2392 * Don't report unconfigured devices (Wildcard devs, 2393 * devices only for target mode, device instances 2394 * that have been invalidated but are waiting for 2395 * their last reference count to be released). 2396 */ 2397 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2398 return (1); 2399 2400 xpt_compile_path(&path, 2401 NULL, 2402 device->target->bus->path_id, 2403 device->target->target_id, 2404 device->lun_id); 2405 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2406 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2407 xpt_action((union ccb *)&cgd); 2408 csa->callback(csa->callback_arg, 2409 AC_FOUND_DEVICE, 2410 &path, &cgd); 2411 xpt_release_path(&path); 2412 2413 return(1); 2414} 2415 2416static int 2417xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2418{ 2419 struct cam_path path; 2420 struct ccb_pathinq cpi; 2421 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2422 2423 xpt_compile_path(&path, /*periph*/NULL, 2424 bus->path_id, 2425 CAM_TARGET_WILDCARD, 2426 CAM_LUN_WILDCARD); 2427 xpt_path_lock(&path); 2428 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2429 cpi.ccb_h.func_code = XPT_PATH_INQ; 2430 xpt_action((union ccb *)&cpi); 2431 csa->callback(csa->callback_arg, 2432 AC_PATH_REGISTERED, 2433 &path, &cpi); 2434 xpt_path_unlock(&path); 2435 xpt_release_path(&path); 2436 2437 return(1); 2438} 2439 2440void 2441xpt_action(union ccb *start_ccb) 2442{ 2443 2444 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2445 2446 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2447 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2448} 2449 2450void 2451xpt_action_default(union ccb *start_ccb) 2452{ 2453 struct cam_path *path; 2454 struct cam_sim *sim; 2455 int lock; 2456 2457 path = start_ccb->ccb_h.path; 2458 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2459 2460 switch (start_ccb->ccb_h.func_code) { 2461 case XPT_SCSI_IO: 2462 { 2463 struct cam_ed *device; 2464 2465 /* 2466 * For the sake of compatibility with SCSI-1 2467 * devices that may not understand the identify 2468 * message, we include lun information in the 2469 * second byte of all commands. SCSI-1 specifies 2470 * that luns are a 3 bit value and reserves only 3 2471 * bits for lun information in the CDB. Later 2472 * revisions of the SCSI spec allow for more than 8 2473 * luns, but have deprecated lun information in the 2474 * CDB. So, if the lun won't fit, we must omit. 2475 * 2476 * Also be aware that during initial probing for devices, 2477 * the inquiry information is unknown but initialized to 0. 2478 * This means that this code will be exercised while probing 2479 * devices with an ANSI revision greater than 2. 2480 */ 2481 device = path->device; 2482 if (device->protocol_version <= SCSI_REV_2 2483 && start_ccb->ccb_h.target_lun < 8 2484 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2485 2486 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2487 start_ccb->ccb_h.target_lun << 5; 2488 } 2489 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2490 } 2491 /* FALLTHROUGH */ 2492 case XPT_TARGET_IO: 2493 case XPT_CONT_TARGET_IO: 2494 start_ccb->csio.sense_resid = 0; 2495 start_ccb->csio.resid = 0; 2496 /* FALLTHROUGH */ 2497 case XPT_ATA_IO: 2498 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2499 start_ccb->ataio.resid = 0; 2500 /* FALLTHROUGH */ 2501 case XPT_RESET_DEV: 2502 case XPT_ENG_EXEC: 2503 case XPT_SMP_IO: 2504 { 2505 struct cam_devq *devq; 2506 2507 devq = path->bus->sim->devq; 2508 mtx_lock(&devq->send_mtx); 2509 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2510 if (xpt_schedule_devq(devq, path->device) != 0) 2511 xpt_run_devq(devq); 2512 mtx_unlock(&devq->send_mtx); 2513 break; 2514 } 2515 case XPT_CALC_GEOMETRY: 2516 /* Filter out garbage */ 2517 if (start_ccb->ccg.block_size == 0 2518 || start_ccb->ccg.volume_size == 0) { 2519 start_ccb->ccg.cylinders = 0; 2520 start_ccb->ccg.heads = 0; 2521 start_ccb->ccg.secs_per_track = 0; 2522 start_ccb->ccb_h.status = CAM_REQ_CMP; 2523 break; 2524 } 2525#if defined(PC98) || defined(__sparc64__) 2526 /* 2527 * In a PC-98 system, geometry translation depens on 2528 * the "real" device geometry obtained from mode page 4. 2529 * SCSI geometry translation is performed in the 2530 * initialization routine of the SCSI BIOS and the result 2531 * stored in host memory. If the translation is available 2532 * in host memory, use it. If not, rely on the default 2533 * translation the device driver performs. 2534 * For sparc64, we may need adjust the geometry of large 2535 * disks in order to fit the limitations of the 16-bit 2536 * fields of the VTOC8 disk label. 2537 */ 2538 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2539 start_ccb->ccb_h.status = CAM_REQ_CMP; 2540 break; 2541 } 2542#endif 2543 goto call_sim; 2544 case XPT_ABORT: 2545 { 2546 union ccb* abort_ccb; 2547 2548 abort_ccb = start_ccb->cab.abort_ccb; 2549 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2550 2551 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2552 struct cam_ccbq *ccbq; 2553 struct cam_ed *device; 2554 2555 device = abort_ccb->ccb_h.path->device; 2556 ccbq = &device->ccbq; 2557 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2558 abort_ccb->ccb_h.status = 2559 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2560 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2561 xpt_done(abort_ccb); 2562 start_ccb->ccb_h.status = CAM_REQ_CMP; 2563 break; 2564 } 2565 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2566 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2567 /* 2568 * We've caught this ccb en route to 2569 * the SIM. Flag it for abort and the 2570 * SIM will do so just before starting 2571 * real work on the CCB. 2572 */ 2573 abort_ccb->ccb_h.status = 2574 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2575 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2576 start_ccb->ccb_h.status = CAM_REQ_CMP; 2577 break; 2578 } 2579 } 2580 if (XPT_FC_IS_QUEUED(abort_ccb) 2581 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2582 /* 2583 * It's already completed but waiting 2584 * for our SWI to get to it. 2585 */ 2586 start_ccb->ccb_h.status = CAM_UA_ABORT; 2587 break; 2588 } 2589 /* 2590 * If we weren't able to take care of the abort request 2591 * in the XPT, pass the request down to the SIM for processing. 2592 */ 2593 } 2594 /* FALLTHROUGH */ 2595 case XPT_ACCEPT_TARGET_IO: 2596 case XPT_EN_LUN: 2597 case XPT_IMMED_NOTIFY: 2598 case XPT_NOTIFY_ACK: 2599 case XPT_RESET_BUS: 2600 case XPT_IMMEDIATE_NOTIFY: 2601 case XPT_NOTIFY_ACKNOWLEDGE: 2602 case XPT_GET_SIM_KNOB: 2603 case XPT_SET_SIM_KNOB: 2604 case XPT_GET_TRAN_SETTINGS: 2605 case XPT_SET_TRAN_SETTINGS: 2606 case XPT_PATH_INQ: 2607call_sim: 2608 sim = path->bus->sim; 2609 lock = (mtx_owned(sim->mtx) == 0); 2610 if (lock) 2611 CAM_SIM_LOCK(sim); 2612 (*(sim->sim_action))(sim, start_ccb); 2613 if (lock) 2614 CAM_SIM_UNLOCK(sim); 2615 break; 2616 case XPT_PATH_STATS: 2617 start_ccb->cpis.last_reset = path->bus->last_reset; 2618 start_ccb->ccb_h.status = CAM_REQ_CMP; 2619 break; 2620 case XPT_GDEV_TYPE: 2621 { 2622 struct cam_ed *dev; 2623 2624 dev = path->device; 2625 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2626 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2627 } else { 2628 struct ccb_getdev *cgd; 2629 2630 cgd = &start_ccb->cgd; 2631 cgd->protocol = dev->protocol; 2632 cgd->inq_data = dev->inq_data; 2633 cgd->ident_data = dev->ident_data; 2634 cgd->inq_flags = dev->inq_flags; 2635 cgd->ccb_h.status = CAM_REQ_CMP; 2636 cgd->serial_num_len = dev->serial_num_len; 2637 if ((dev->serial_num_len > 0) 2638 && (dev->serial_num != NULL)) 2639 bcopy(dev->serial_num, cgd->serial_num, 2640 dev->serial_num_len); 2641 } 2642 break; 2643 } 2644 case XPT_GDEV_STATS: 2645 { 2646 struct cam_ed *dev; 2647 2648 dev = path->device; 2649 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2650 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2651 } else { 2652 struct ccb_getdevstats *cgds; 2653 struct cam_eb *bus; 2654 struct cam_et *tar; 2655 struct cam_devq *devq; 2656 2657 cgds = &start_ccb->cgds; 2658 bus = path->bus; 2659 tar = path->target; 2660 devq = bus->sim->devq; 2661 mtx_lock(&devq->send_mtx); 2662 cgds->dev_openings = dev->ccbq.dev_openings; 2663 cgds->dev_active = dev->ccbq.dev_active; 2664 cgds->allocated = dev->ccbq.allocated; 2665 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2666 cgds->held = cgds->allocated - cgds->dev_active - 2667 cgds->queued; 2668 cgds->last_reset = tar->last_reset; 2669 cgds->maxtags = dev->maxtags; 2670 cgds->mintags = dev->mintags; 2671 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2672 cgds->last_reset = bus->last_reset; 2673 mtx_unlock(&devq->send_mtx); 2674 cgds->ccb_h.status = CAM_REQ_CMP; 2675 } 2676 break; 2677 } 2678 case XPT_GDEVLIST: 2679 { 2680 struct cam_periph *nperiph; 2681 struct periph_list *periph_head; 2682 struct ccb_getdevlist *cgdl; 2683 u_int i; 2684 struct cam_ed *device; 2685 int found; 2686 2687 2688 found = 0; 2689 2690 /* 2691 * Don't want anyone mucking with our data. 2692 */ 2693 device = path->device; 2694 periph_head = &device->periphs; 2695 cgdl = &start_ccb->cgdl; 2696 2697 /* 2698 * Check and see if the list has changed since the user 2699 * last requested a list member. If so, tell them that the 2700 * list has changed, and therefore they need to start over 2701 * from the beginning. 2702 */ 2703 if ((cgdl->index != 0) && 2704 (cgdl->generation != device->generation)) { 2705 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2706 break; 2707 } 2708 2709 /* 2710 * Traverse the list of peripherals and attempt to find 2711 * the requested peripheral. 2712 */ 2713 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2714 (nperiph != NULL) && (i <= cgdl->index); 2715 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2716 if (i == cgdl->index) { 2717 strncpy(cgdl->periph_name, 2718 nperiph->periph_name, 2719 DEV_IDLEN); 2720 cgdl->unit_number = nperiph->unit_number; 2721 found = 1; 2722 } 2723 } 2724 if (found == 0) { 2725 cgdl->status = CAM_GDEVLIST_ERROR; 2726 break; 2727 } 2728 2729 if (nperiph == NULL) 2730 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2731 else 2732 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2733 2734 cgdl->index++; 2735 cgdl->generation = device->generation; 2736 2737 cgdl->ccb_h.status = CAM_REQ_CMP; 2738 break; 2739 } 2740 case XPT_DEV_MATCH: 2741 { 2742 dev_pos_type position_type; 2743 struct ccb_dev_match *cdm; 2744 2745 cdm = &start_ccb->cdm; 2746 2747 /* 2748 * There are two ways of getting at information in the EDT. 2749 * The first way is via the primary EDT tree. It starts 2750 * with a list of busses, then a list of targets on a bus, 2751 * then devices/luns on a target, and then peripherals on a 2752 * device/lun. The "other" way is by the peripheral driver 2753 * lists. The peripheral driver lists are organized by 2754 * peripheral driver. (obviously) So it makes sense to 2755 * use the peripheral driver list if the user is looking 2756 * for something like "da1", or all "da" devices. If the 2757 * user is looking for something on a particular bus/target 2758 * or lun, it's generally better to go through the EDT tree. 2759 */ 2760 2761 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2762 position_type = cdm->pos.position_type; 2763 else { 2764 u_int i; 2765 2766 position_type = CAM_DEV_POS_NONE; 2767 2768 for (i = 0; i < cdm->num_patterns; i++) { 2769 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2770 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2771 position_type = CAM_DEV_POS_EDT; 2772 break; 2773 } 2774 } 2775 2776 if (cdm->num_patterns == 0) 2777 position_type = CAM_DEV_POS_EDT; 2778 else if (position_type == CAM_DEV_POS_NONE) 2779 position_type = CAM_DEV_POS_PDRV; 2780 } 2781 2782 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2783 case CAM_DEV_POS_EDT: 2784 xptedtmatch(cdm); 2785 break; 2786 case CAM_DEV_POS_PDRV: 2787 xptperiphlistmatch(cdm); 2788 break; 2789 default: 2790 cdm->status = CAM_DEV_MATCH_ERROR; 2791 break; 2792 } 2793 2794 if (cdm->status == CAM_DEV_MATCH_ERROR) 2795 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2796 else 2797 start_ccb->ccb_h.status = CAM_REQ_CMP; 2798 2799 break; 2800 } 2801 case XPT_SASYNC_CB: 2802 { 2803 struct ccb_setasync *csa; 2804 struct async_node *cur_entry; 2805 struct async_list *async_head; 2806 u_int32_t added; 2807 2808 csa = &start_ccb->csa; 2809 added = csa->event_enable; 2810 async_head = &path->device->asyncs; 2811 2812 /* 2813 * If there is already an entry for us, simply 2814 * update it. 2815 */ 2816 cur_entry = SLIST_FIRST(async_head); 2817 while (cur_entry != NULL) { 2818 if ((cur_entry->callback_arg == csa->callback_arg) 2819 && (cur_entry->callback == csa->callback)) 2820 break; 2821 cur_entry = SLIST_NEXT(cur_entry, links); 2822 } 2823 2824 if (cur_entry != NULL) { 2825 /* 2826 * If the request has no flags set, 2827 * remove the entry. 2828 */ 2829 added &= ~cur_entry->event_enable; 2830 if (csa->event_enable == 0) { 2831 SLIST_REMOVE(async_head, cur_entry, 2832 async_node, links); 2833 xpt_release_device(path->device); 2834 free(cur_entry, M_CAMXPT); 2835 } else { 2836 cur_entry->event_enable = csa->event_enable; 2837 } 2838 csa->event_enable = added; 2839 } else { 2840 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2841 M_NOWAIT); 2842 if (cur_entry == NULL) { 2843 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2844 break; 2845 } 2846 cur_entry->event_enable = csa->event_enable; 2847 cur_entry->event_lock = 2848 mtx_owned(path->bus->sim->mtx) ? 1 : 0; 2849 cur_entry->callback_arg = csa->callback_arg; 2850 cur_entry->callback = csa->callback; 2851 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2852 xpt_acquire_device(path->device); 2853 } 2854 start_ccb->ccb_h.status = CAM_REQ_CMP; 2855 break; 2856 } 2857 case XPT_REL_SIMQ: 2858 { 2859 struct ccb_relsim *crs; 2860 struct cam_ed *dev; 2861 2862 crs = &start_ccb->crs; 2863 dev = path->device; 2864 if (dev == NULL) { 2865 2866 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2867 break; 2868 } 2869 2870 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2871 2872 /* Don't ever go below one opening */ 2873 if (crs->openings > 0) { 2874 xpt_dev_ccbq_resize(path, crs->openings); 2875 if (bootverbose) { 2876 xpt_print(path, 2877 "number of openings is now %d\n", 2878 crs->openings); 2879 } 2880 } 2881 } 2882 2883 mtx_lock(&dev->sim->devq->send_mtx); 2884 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2885 2886 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2887 2888 /* 2889 * Just extend the old timeout and decrement 2890 * the freeze count so that a single timeout 2891 * is sufficient for releasing the queue. 2892 */ 2893 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2894 callout_stop(&dev->callout); 2895 } else { 2896 2897 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2898 } 2899 2900 callout_reset(&dev->callout, 2901 (crs->release_timeout * hz) / 1000, 2902 xpt_release_devq_timeout, dev); 2903 2904 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2905 2906 } 2907 2908 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2909 2910 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2911 /* 2912 * Decrement the freeze count so that a single 2913 * completion is still sufficient to unfreeze 2914 * the queue. 2915 */ 2916 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2917 } else { 2918 2919 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2920 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2921 } 2922 } 2923 2924 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2925 2926 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2927 || (dev->ccbq.dev_active == 0)) { 2928 2929 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2930 } else { 2931 2932 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2933 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2934 } 2935 } 2936 mtx_unlock(&dev->sim->devq->send_mtx); 2937 2938 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 2939 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 2940 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 2941 start_ccb->ccb_h.status = CAM_REQ_CMP; 2942 break; 2943 } 2944 case XPT_DEBUG: { 2945 struct cam_path *oldpath; 2946 2947 /* Check that all request bits are supported. */ 2948 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 2949 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2950 break; 2951 } 2952 2953 cam_dflags = CAM_DEBUG_NONE; 2954 if (cam_dpath != NULL) { 2955 oldpath = cam_dpath; 2956 cam_dpath = NULL; 2957 xpt_free_path(oldpath); 2958 } 2959 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 2960 if (xpt_create_path(&cam_dpath, NULL, 2961 start_ccb->ccb_h.path_id, 2962 start_ccb->ccb_h.target_id, 2963 start_ccb->ccb_h.target_lun) != 2964 CAM_REQ_CMP) { 2965 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2966 } else { 2967 cam_dflags = start_ccb->cdbg.flags; 2968 start_ccb->ccb_h.status = CAM_REQ_CMP; 2969 xpt_print(cam_dpath, "debugging flags now %x\n", 2970 cam_dflags); 2971 } 2972 } else 2973 start_ccb->ccb_h.status = CAM_REQ_CMP; 2974 break; 2975 } 2976 case XPT_NOOP: 2977 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 2978 xpt_freeze_devq(path, 1); 2979 start_ccb->ccb_h.status = CAM_REQ_CMP; 2980 break; 2981 default: 2982 case XPT_SDEV_TYPE: 2983 case XPT_TERM_IO: 2984 case XPT_ENG_INQ: 2985 /* XXX Implement */ 2986 printf("%s: CCB type %#x not supported\n", __func__, 2987 start_ccb->ccb_h.func_code); 2988 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 2989 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 2990 xpt_done(start_ccb); 2991 } 2992 break; 2993 } 2994} 2995 2996void 2997xpt_polled_action(union ccb *start_ccb) 2998{ 2999 u_int32_t timeout; 3000 struct cam_sim *sim; 3001 struct cam_devq *devq; 3002 struct cam_ed *dev; 3003 3004 timeout = start_ccb->ccb_h.timeout * 10; 3005 sim = start_ccb->ccb_h.path->bus->sim; 3006 devq = sim->devq; 3007 dev = start_ccb->ccb_h.path->device; 3008 3009 mtx_unlock(&dev->device_mtx); 3010 3011 /* 3012 * Steal an opening so that no other queued requests 3013 * can get it before us while we simulate interrupts. 3014 */ 3015 mtx_lock(&devq->send_mtx); 3016 dev->ccbq.dev_openings--; 3017 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3018 (--timeout > 0)) { 3019 mtx_unlock(&devq->send_mtx); 3020 DELAY(100); 3021 CAM_SIM_LOCK(sim); 3022 (*(sim->sim_poll))(sim); 3023 CAM_SIM_UNLOCK(sim); 3024 camisr_runqueue(); 3025 mtx_lock(&devq->send_mtx); 3026 } 3027 dev->ccbq.dev_openings++; 3028 mtx_unlock(&devq->send_mtx); 3029 3030 if (timeout != 0) { 3031 xpt_action(start_ccb); 3032 while(--timeout > 0) { 3033 CAM_SIM_LOCK(sim); 3034 (*(sim->sim_poll))(sim); 3035 CAM_SIM_UNLOCK(sim); 3036 camisr_runqueue(); 3037 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3038 != CAM_REQ_INPROG) 3039 break; 3040 DELAY(100); 3041 } 3042 if (timeout == 0) { 3043 /* 3044 * XXX Is it worth adding a sim_timeout entry 3045 * point so we can attempt recovery? If 3046 * this is only used for dumps, I don't think 3047 * it is. 3048 */ 3049 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3050 } 3051 } else { 3052 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3053 } 3054 3055 mtx_lock(&dev->device_mtx); 3056} 3057 3058/* 3059 * Schedule a peripheral driver to receive a ccb when its 3060 * target device has space for more transactions. 3061 */ 3062void 3063xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3064{ 3065 3066 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3067 cam_periph_assert(periph, MA_OWNED); 3068 if (new_priority < periph->scheduled_priority) { 3069 periph->scheduled_priority = new_priority; 3070 xpt_run_allocq(periph, 0); 3071 } 3072} 3073 3074 3075/* 3076 * Schedule a device to run on a given queue. 3077 * If the device was inserted as a new entry on the queue, 3078 * return 1 meaning the device queue should be run. If we 3079 * were already queued, implying someone else has already 3080 * started the queue, return 0 so the caller doesn't attempt 3081 * to run the queue. 3082 */ 3083static int 3084xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3085 u_int32_t new_priority) 3086{ 3087 int retval; 3088 u_int32_t old_priority; 3089 3090 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3091 3092 old_priority = pinfo->priority; 3093 3094 /* 3095 * Are we already queued? 3096 */ 3097 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3098 /* Simply reorder based on new priority */ 3099 if (new_priority < old_priority) { 3100 camq_change_priority(queue, pinfo->index, 3101 new_priority); 3102 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3103 ("changed priority to %d\n", 3104 new_priority)); 3105 retval = 1; 3106 } else 3107 retval = 0; 3108 } else { 3109 /* New entry on the queue */ 3110 if (new_priority < old_priority) 3111 pinfo->priority = new_priority; 3112 3113 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3114 ("Inserting onto queue\n")); 3115 pinfo->generation = ++queue->generation; 3116 camq_insert(queue, pinfo); 3117 retval = 1; 3118 } 3119 return (retval); 3120} 3121 3122static void 3123xpt_run_allocq_task(void *context, int pending) 3124{ 3125 struct cam_periph *periph = context; 3126 3127 cam_periph_lock(periph); 3128 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3129 xpt_run_allocq(periph, 1); 3130 cam_periph_unlock(periph); 3131 cam_periph_release(periph); 3132} 3133 3134static void 3135xpt_run_allocq(struct cam_periph *periph, int sleep) 3136{ 3137 struct cam_ed *device; 3138 union ccb *ccb; 3139 uint32_t prio; 3140 3141 cam_periph_assert(periph, MA_OWNED); 3142 if (periph->periph_allocating) 3143 return; 3144 periph->periph_allocating = 1; 3145 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3146 device = periph->path->device; 3147 ccb = NULL; 3148restart: 3149 while ((prio = min(periph->scheduled_priority, 3150 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3151 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3152 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3153 3154 if (ccb == NULL && 3155 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3156 if (sleep) { 3157 ccb = xpt_get_ccb(periph); 3158 goto restart; 3159 } 3160 if (periph->flags & CAM_PERIPH_RUN_TASK) 3161 break; 3162 cam_periph_doacquire(periph); 3163 periph->flags |= CAM_PERIPH_RUN_TASK; 3164 taskqueue_enqueue(xsoftc.xpt_taskq, 3165 &periph->periph_run_task); 3166 break; 3167 } 3168 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3169 if (prio == periph->immediate_priority) { 3170 periph->immediate_priority = CAM_PRIORITY_NONE; 3171 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3172 ("waking cam_periph_getccb()\n")); 3173 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3174 periph_links.sle); 3175 wakeup(&periph->ccb_list); 3176 } else { 3177 periph->scheduled_priority = CAM_PRIORITY_NONE; 3178 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3179 ("calling periph_start()\n")); 3180 periph->periph_start(periph, ccb); 3181 } 3182 ccb = NULL; 3183 } 3184 if (ccb != NULL) 3185 xpt_release_ccb(ccb); 3186 periph->periph_allocating = 0; 3187} 3188 3189static void 3190xpt_run_devq(struct cam_devq *devq) 3191{ 3192 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 3193 int lock; 3194 3195 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3196 3197 devq->send_queue.qfrozen_cnt++; 3198 while ((devq->send_queue.entries > 0) 3199 && (devq->send_openings > 0) 3200 && (devq->send_queue.qfrozen_cnt <= 1)) { 3201 struct cam_ed *device; 3202 union ccb *work_ccb; 3203 struct cam_sim *sim; 3204 3205 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3206 CAMQ_HEAD); 3207 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3208 ("running device %p\n", device)); 3209 3210 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3211 if (work_ccb == NULL) { 3212 printf("device on run queue with no ccbs???\n"); 3213 continue; 3214 } 3215 3216 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3217 3218 mtx_lock(&xsoftc.xpt_highpower_lock); 3219 if (xsoftc.num_highpower <= 0) { 3220 /* 3221 * We got a high power command, but we 3222 * don't have any available slots. Freeze 3223 * the device queue until we have a slot 3224 * available. 3225 */ 3226 xpt_freeze_devq_device(device, 1); 3227 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3228 highpowerq_entry); 3229 3230 mtx_unlock(&xsoftc.xpt_highpower_lock); 3231 continue; 3232 } else { 3233 /* 3234 * Consume a high power slot while 3235 * this ccb runs. 3236 */ 3237 xsoftc.num_highpower--; 3238 } 3239 mtx_unlock(&xsoftc.xpt_highpower_lock); 3240 } 3241 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3242 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3243 devq->send_openings--; 3244 devq->send_active++; 3245 xpt_schedule_devq(devq, device); 3246 mtx_unlock(&devq->send_mtx); 3247 3248 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3249 /* 3250 * The client wants to freeze the queue 3251 * after this CCB is sent. 3252 */ 3253 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3254 } 3255 3256 /* In Target mode, the peripheral driver knows best... */ 3257 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3258 if ((device->inq_flags & SID_CmdQue) != 0 3259 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3260 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3261 else 3262 /* 3263 * Clear this in case of a retried CCB that 3264 * failed due to a rejected tag. 3265 */ 3266 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3267 } 3268 3269 switch (work_ccb->ccb_h.func_code) { 3270 case XPT_SCSI_IO: 3271 CAM_DEBUG(work_ccb->ccb_h.path, 3272 CAM_DEBUG_CDB,("%s. CDB: %s\n", 3273 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0], 3274 &device->inq_data), 3275 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes, 3276 cdb_str, sizeof(cdb_str)))); 3277 break; 3278 case XPT_ATA_IO: 3279 CAM_DEBUG(work_ccb->ccb_h.path, 3280 CAM_DEBUG_CDB,("%s. ACB: %s\n", 3281 ata_op_string(&work_ccb->ataio.cmd), 3282 ata_cmd_string(&work_ccb->ataio.cmd, 3283 cdb_str, sizeof(cdb_str)))); 3284 break; 3285 default: 3286 break; 3287 } 3288 3289 /* 3290 * Device queues can be shared among multiple SIM instances 3291 * that reside on different busses. Use the SIM from the 3292 * queued device, rather than the one from the calling bus. 3293 */ 3294 sim = device->sim; 3295 lock = (mtx_owned(sim->mtx) == 0); 3296 if (lock) 3297 CAM_SIM_LOCK(sim); 3298 (*(sim->sim_action))(sim, work_ccb); 3299 if (lock) 3300 CAM_SIM_UNLOCK(sim); 3301 mtx_lock(&devq->send_mtx); 3302 } 3303 devq->send_queue.qfrozen_cnt--; 3304} 3305 3306/* 3307 * This function merges stuff from the slave ccb into the master ccb, while 3308 * keeping important fields in the master ccb constant. 3309 */ 3310void 3311xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3312{ 3313 3314 /* 3315 * Pull fields that are valid for peripheral drivers to set 3316 * into the master CCB along with the CCB "payload". 3317 */ 3318 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3319 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3320 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3321 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3322 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3323 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3324} 3325 3326void 3327xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3328{ 3329 3330 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3331 ccb_h->pinfo.priority = priority; 3332 ccb_h->path = path; 3333 ccb_h->path_id = path->bus->path_id; 3334 if (path->target) 3335 ccb_h->target_id = path->target->target_id; 3336 else 3337 ccb_h->target_id = CAM_TARGET_WILDCARD; 3338 if (path->device) { 3339 ccb_h->target_lun = path->device->lun_id; 3340 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3341 } else { 3342 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3343 } 3344 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3345 ccb_h->flags = 0; 3346 ccb_h->xflags = 0; 3347} 3348 3349/* Path manipulation functions */ 3350cam_status 3351xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3352 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3353{ 3354 struct cam_path *path; 3355 cam_status status; 3356 3357 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3358 3359 if (path == NULL) { 3360 status = CAM_RESRC_UNAVAIL; 3361 return(status); 3362 } 3363 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3364 if (status != CAM_REQ_CMP) { 3365 free(path, M_CAMPATH); 3366 path = NULL; 3367 } 3368 *new_path_ptr = path; 3369 return (status); 3370} 3371 3372cam_status 3373xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3374 struct cam_periph *periph, path_id_t path_id, 3375 target_id_t target_id, lun_id_t lun_id) 3376{ 3377 3378 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3379 lun_id)); 3380} 3381 3382cam_status 3383xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3384 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3385{ 3386 struct cam_eb *bus; 3387 struct cam_et *target; 3388 struct cam_ed *device; 3389 cam_status status; 3390 3391 status = CAM_REQ_CMP; /* Completed without error */ 3392 target = NULL; /* Wildcarded */ 3393 device = NULL; /* Wildcarded */ 3394 3395 /* 3396 * We will potentially modify the EDT, so block interrupts 3397 * that may attempt to create cam paths. 3398 */ 3399 bus = xpt_find_bus(path_id); 3400 if (bus == NULL) { 3401 status = CAM_PATH_INVALID; 3402 } else { 3403 xpt_lock_buses(); 3404 mtx_lock(&bus->eb_mtx); 3405 target = xpt_find_target(bus, target_id); 3406 if (target == NULL) { 3407 /* Create one */ 3408 struct cam_et *new_target; 3409 3410 new_target = xpt_alloc_target(bus, target_id); 3411 if (new_target == NULL) { 3412 status = CAM_RESRC_UNAVAIL; 3413 } else { 3414 target = new_target; 3415 } 3416 } 3417 xpt_unlock_buses(); 3418 if (target != NULL) { 3419 device = xpt_find_device(target, lun_id); 3420 if (device == NULL) { 3421 /* Create one */ 3422 struct cam_ed *new_device; 3423 3424 new_device = 3425 (*(bus->xport->alloc_device))(bus, 3426 target, 3427 lun_id); 3428 if (new_device == NULL) { 3429 status = CAM_RESRC_UNAVAIL; 3430 } else { 3431 device = new_device; 3432 } 3433 } 3434 } 3435 mtx_unlock(&bus->eb_mtx); 3436 } 3437 3438 /* 3439 * Only touch the user's data if we are successful. 3440 */ 3441 if (status == CAM_REQ_CMP) { 3442 new_path->periph = perph; 3443 new_path->bus = bus; 3444 new_path->target = target; 3445 new_path->device = device; 3446 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3447 } else { 3448 if (device != NULL) 3449 xpt_release_device(device); 3450 if (target != NULL) 3451 xpt_release_target(target); 3452 if (bus != NULL) 3453 xpt_release_bus(bus); 3454 } 3455 return (status); 3456} 3457 3458cam_status 3459xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3460{ 3461 struct cam_path *new_path; 3462 3463 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3464 if (new_path == NULL) 3465 return(CAM_RESRC_UNAVAIL); 3466 xpt_copy_path(new_path, path); 3467 *new_path_ptr = new_path; 3468 return (CAM_REQ_CMP); 3469} 3470 3471void 3472xpt_copy_path(struct cam_path *new_path, struct cam_path *path) 3473{ 3474 3475 *new_path = *path; 3476 if (path->bus != NULL) 3477 xpt_acquire_bus(path->bus); 3478 if (path->target != NULL) 3479 xpt_acquire_target(path->target); 3480 if (path->device != NULL) 3481 xpt_acquire_device(path->device); 3482} 3483 3484void 3485xpt_release_path(struct cam_path *path) 3486{ 3487 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3488 if (path->device != NULL) { 3489 xpt_release_device(path->device); 3490 path->device = NULL; 3491 } 3492 if (path->target != NULL) { 3493 xpt_release_target(path->target); 3494 path->target = NULL; 3495 } 3496 if (path->bus != NULL) { 3497 xpt_release_bus(path->bus); 3498 path->bus = NULL; 3499 } 3500} 3501 3502void 3503xpt_free_path(struct cam_path *path) 3504{ 3505 3506 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3507 xpt_release_path(path); 3508 free(path, M_CAMPATH); 3509} 3510 3511void 3512xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3513 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3514{ 3515 3516 xpt_lock_buses(); 3517 if (bus_ref) { 3518 if (path->bus) 3519 *bus_ref = path->bus->refcount; 3520 else 3521 *bus_ref = 0; 3522 } 3523 if (periph_ref) { 3524 if (path->periph) 3525 *periph_ref = path->periph->refcount; 3526 else 3527 *periph_ref = 0; 3528 } 3529 xpt_unlock_buses(); 3530 if (target_ref) { 3531 if (path->target) 3532 *target_ref = path->target->refcount; 3533 else 3534 *target_ref = 0; 3535 } 3536 if (device_ref) { 3537 if (path->device) 3538 *device_ref = path->device->refcount; 3539 else 3540 *device_ref = 0; 3541 } 3542} 3543 3544/* 3545 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3546 * in path1, 2 for match with wildcards in path2. 3547 */ 3548int 3549xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3550{ 3551 int retval = 0; 3552 3553 if (path1->bus != path2->bus) { 3554 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3555 retval = 1; 3556 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3557 retval = 2; 3558 else 3559 return (-1); 3560 } 3561 if (path1->target != path2->target) { 3562 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3563 if (retval == 0) 3564 retval = 1; 3565 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3566 retval = 2; 3567 else 3568 return (-1); 3569 } 3570 if (path1->device != path2->device) { 3571 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3572 if (retval == 0) 3573 retval = 1; 3574 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3575 retval = 2; 3576 else 3577 return (-1); 3578 } 3579 return (retval); 3580} 3581 3582int 3583xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3584{ 3585 int retval = 0; 3586 3587 if (path->bus != dev->target->bus) { 3588 if (path->bus->path_id == CAM_BUS_WILDCARD) 3589 retval = 1; 3590 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3591 retval = 2; 3592 else 3593 return (-1); 3594 } 3595 if (path->target != dev->target) { 3596 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3597 if (retval == 0) 3598 retval = 1; 3599 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3600 retval = 2; 3601 else 3602 return (-1); 3603 } 3604 if (path->device != dev) { 3605 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3606 if (retval == 0) 3607 retval = 1; 3608 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3609 retval = 2; 3610 else 3611 return (-1); 3612 } 3613 return (retval); 3614} 3615 3616void 3617xpt_print_path(struct cam_path *path) 3618{ 3619 3620 if (path == NULL) 3621 printf("(nopath): "); 3622 else { 3623 if (path->periph != NULL) 3624 printf("(%s%d:", path->periph->periph_name, 3625 path->periph->unit_number); 3626 else 3627 printf("(noperiph:"); 3628 3629 if (path->bus != NULL) 3630 printf("%s%d:%d:", path->bus->sim->sim_name, 3631 path->bus->sim->unit_number, 3632 path->bus->sim->bus_id); 3633 else 3634 printf("nobus:"); 3635 3636 if (path->target != NULL) 3637 printf("%d:", path->target->target_id); 3638 else 3639 printf("X:"); 3640 3641 if (path->device != NULL) 3642 printf("%jx): ", (uintmax_t)path->device->lun_id); 3643 else 3644 printf("X): "); 3645 } 3646} 3647 3648void 3649xpt_print_device(struct cam_ed *device) 3650{ 3651 3652 if (device == NULL) 3653 printf("(nopath): "); 3654 else { 3655 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3656 device->sim->unit_number, 3657 device->sim->bus_id, 3658 device->target->target_id, 3659 (uintmax_t)device->lun_id); 3660 } 3661} 3662 3663void 3664xpt_print(struct cam_path *path, const char *fmt, ...) 3665{ 3666 va_list ap; 3667 xpt_print_path(path); 3668 va_start(ap, fmt); 3669 vprintf(fmt, ap); 3670 va_end(ap); 3671} 3672 3673int 3674xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3675{ 3676 struct sbuf sb; 3677 3678 sbuf_new(&sb, str, str_len, 0); 3679 3680 if (path == NULL) 3681 sbuf_printf(&sb, "(nopath): "); 3682 else { 3683 if (path->periph != NULL) 3684 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3685 path->periph->unit_number); 3686 else 3687 sbuf_printf(&sb, "(noperiph:"); 3688 3689 if (path->bus != NULL) 3690 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3691 path->bus->sim->unit_number, 3692 path->bus->sim->bus_id); 3693 else 3694 sbuf_printf(&sb, "nobus:"); 3695 3696 if (path->target != NULL) 3697 sbuf_printf(&sb, "%d:", path->target->target_id); 3698 else 3699 sbuf_printf(&sb, "X:"); 3700 3701 if (path->device != NULL) 3702 sbuf_printf(&sb, "%jx): ", 3703 (uintmax_t)path->device->lun_id); 3704 else 3705 sbuf_printf(&sb, "X): "); 3706 } 3707 sbuf_finish(&sb); 3708 3709 return(sbuf_len(&sb)); 3710} 3711 3712path_id_t 3713xpt_path_path_id(struct cam_path *path) 3714{ 3715 return(path->bus->path_id); 3716} 3717 3718target_id_t 3719xpt_path_target_id(struct cam_path *path) 3720{ 3721 if (path->target != NULL) 3722 return (path->target->target_id); 3723 else 3724 return (CAM_TARGET_WILDCARD); 3725} 3726 3727lun_id_t 3728xpt_path_lun_id(struct cam_path *path) 3729{ 3730 if (path->device != NULL) 3731 return (path->device->lun_id); 3732 else 3733 return (CAM_LUN_WILDCARD); 3734} 3735 3736struct cam_sim * 3737xpt_path_sim(struct cam_path *path) 3738{ 3739 3740 return (path->bus->sim); 3741} 3742 3743struct cam_periph* 3744xpt_path_periph(struct cam_path *path) 3745{ 3746 3747 return (path->periph); 3748} 3749 3750int 3751xpt_path_legacy_ata_id(struct cam_path *path) 3752{ 3753 struct cam_eb *bus; 3754 int bus_id; 3755 3756 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) && 3757 strcmp(path->bus->sim->sim_name, "ahcich") != 0 && 3758 strcmp(path->bus->sim->sim_name, "mvsch") != 0 && 3759 strcmp(path->bus->sim->sim_name, "siisch") != 0) 3760 return (-1); 3761 3762 if (strcmp(path->bus->sim->sim_name, "ata") == 0 && 3763 path->bus->sim->unit_number < 2) { 3764 bus_id = path->bus->sim->unit_number; 3765 } else { 3766 bus_id = 2; 3767 xpt_lock_buses(); 3768 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 3769 if (bus == path->bus) 3770 break; 3771 if ((strcmp(bus->sim->sim_name, "ata") == 0 && 3772 bus->sim->unit_number >= 2) || 3773 strcmp(bus->sim->sim_name, "ahcich") == 0 || 3774 strcmp(bus->sim->sim_name, "mvsch") == 0 || 3775 strcmp(bus->sim->sim_name, "siisch") == 0) 3776 bus_id++; 3777 } 3778 xpt_unlock_buses(); 3779 } 3780 if (path->target != NULL) { 3781 if (path->target->target_id < 2) 3782 return (bus_id * 2 + path->target->target_id); 3783 else 3784 return (-1); 3785 } else 3786 return (bus_id * 2); 3787} 3788 3789/* 3790 * Release a CAM control block for the caller. Remit the cost of the structure 3791 * to the device referenced by the path. If the this device had no 'credits' 3792 * and peripheral drivers have registered async callbacks for this notification 3793 * call them now. 3794 */ 3795void 3796xpt_release_ccb(union ccb *free_ccb) 3797{ 3798 struct cam_ed *device; 3799 struct cam_periph *periph; 3800 3801 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3802 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3803 device = free_ccb->ccb_h.path->device; 3804 periph = free_ccb->ccb_h.path->periph; 3805 3806 xpt_free_ccb(free_ccb); 3807 periph->periph_allocated--; 3808 cam_ccbq_release_opening(&device->ccbq); 3809 xpt_run_allocq(periph, 0); 3810} 3811 3812/* Functions accessed by SIM drivers */ 3813 3814static struct xpt_xport xport_default = { 3815 .alloc_device = xpt_alloc_device_default, 3816 .action = xpt_action_default, 3817 .async = xpt_dev_async_default, 3818}; 3819 3820/* 3821 * A sim structure, listing the SIM entry points and instance 3822 * identification info is passed to xpt_bus_register to hook the SIM 3823 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3824 * for this new bus and places it in the array of busses and assigns 3825 * it a path_id. The path_id may be influenced by "hard wiring" 3826 * information specified by the user. Once interrupt services are 3827 * available, the bus will be probed. 3828 */ 3829int32_t 3830xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3831{ 3832 struct cam_eb *new_bus; 3833 struct cam_eb *old_bus; 3834 struct ccb_pathinq cpi; 3835 struct cam_path *path; 3836 cam_status status; 3837 3838 mtx_assert(sim->mtx, MA_OWNED); 3839 3840 sim->bus_id = bus; 3841 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3842 M_CAMXPT, M_NOWAIT|M_ZERO); 3843 if (new_bus == NULL) { 3844 /* Couldn't satisfy request */ 3845 return (CAM_RESRC_UNAVAIL); 3846 } 3847 3848 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 3849 TAILQ_INIT(&new_bus->et_entries); 3850 cam_sim_hold(sim); 3851 new_bus->sim = sim; 3852 timevalclear(&new_bus->last_reset); 3853 new_bus->flags = 0; 3854 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3855 new_bus->generation = 0; 3856 3857 xpt_lock_buses(); 3858 sim->path_id = new_bus->path_id = 3859 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3860 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3861 while (old_bus != NULL 3862 && old_bus->path_id < new_bus->path_id) 3863 old_bus = TAILQ_NEXT(old_bus, links); 3864 if (old_bus != NULL) 3865 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3866 else 3867 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3868 xsoftc.bus_generation++; 3869 xpt_unlock_buses(); 3870 3871 /* 3872 * Set a default transport so that a PATH_INQ can be issued to 3873 * the SIM. This will then allow for probing and attaching of 3874 * a more appropriate transport. 3875 */ 3876 new_bus->xport = &xport_default; 3877 3878 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 3879 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3880 if (status != CAM_REQ_CMP) { 3881 xpt_release_bus(new_bus); 3882 free(path, M_CAMXPT); 3883 return (CAM_RESRC_UNAVAIL); 3884 } 3885 3886 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3887 cpi.ccb_h.func_code = XPT_PATH_INQ; 3888 xpt_action((union ccb *)&cpi); 3889 3890 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3891 switch (cpi.transport) { 3892 case XPORT_SPI: 3893 case XPORT_SAS: 3894 case XPORT_FC: 3895 case XPORT_USB: 3896 case XPORT_ISCSI: 3897 case XPORT_SRP: 3898 case XPORT_PPB: 3899 new_bus->xport = scsi_get_xport(); 3900 break; 3901 case XPORT_ATA: 3902 case XPORT_SATA: 3903 new_bus->xport = ata_get_xport(); 3904 break; 3905 default: 3906 new_bus->xport = &xport_default; 3907 break; 3908 } 3909 } 3910 3911 /* Notify interested parties */ 3912 if (sim->path_id != CAM_XPT_PATH_ID) { 3913 3914 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3915 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 3916 union ccb *scan_ccb; 3917 3918 /* Initiate bus rescan. */ 3919 scan_ccb = xpt_alloc_ccb_nowait(); 3920 if (scan_ccb != NULL) { 3921 scan_ccb->ccb_h.path = path; 3922 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3923 scan_ccb->crcn.flags = 0; 3924 xpt_rescan(scan_ccb); 3925 } else { 3926 xpt_print(path, 3927 "Can't allocate CCB to scan bus\n"); 3928 xpt_free_path(path); 3929 } 3930 } else 3931 xpt_free_path(path); 3932 } else 3933 xpt_free_path(path); 3934 return (CAM_SUCCESS); 3935} 3936 3937int32_t 3938xpt_bus_deregister(path_id_t pathid) 3939{ 3940 struct cam_path bus_path; 3941 cam_status status; 3942 3943 status = xpt_compile_path(&bus_path, NULL, pathid, 3944 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3945 if (status != CAM_REQ_CMP) 3946 return (status); 3947 3948 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3949 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3950 3951 /* Release the reference count held while registered. */ 3952 xpt_release_bus(bus_path.bus); 3953 xpt_release_path(&bus_path); 3954 3955 return (CAM_REQ_CMP); 3956} 3957 3958static path_id_t 3959xptnextfreepathid(void) 3960{ 3961 struct cam_eb *bus; 3962 path_id_t pathid; 3963 const char *strval; 3964 3965 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 3966 pathid = 0; 3967 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3968retry: 3969 /* Find an unoccupied pathid */ 3970 while (bus != NULL && bus->path_id <= pathid) { 3971 if (bus->path_id == pathid) 3972 pathid++; 3973 bus = TAILQ_NEXT(bus, links); 3974 } 3975 3976 /* 3977 * Ensure that this pathid is not reserved for 3978 * a bus that may be registered in the future. 3979 */ 3980 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3981 ++pathid; 3982 /* Start the search over */ 3983 goto retry; 3984 } 3985 return (pathid); 3986} 3987 3988static path_id_t 3989xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3990{ 3991 path_id_t pathid; 3992 int i, dunit, val; 3993 char buf[32]; 3994 const char *dname; 3995 3996 pathid = CAM_XPT_PATH_ID; 3997 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3998 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 3999 return (pathid); 4000 i = 0; 4001 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4002 if (strcmp(dname, "scbus")) { 4003 /* Avoid a bit of foot shooting. */ 4004 continue; 4005 } 4006 if (dunit < 0) /* unwired?! */ 4007 continue; 4008 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4009 if (sim_bus == val) { 4010 pathid = dunit; 4011 break; 4012 } 4013 } else if (sim_bus == 0) { 4014 /* Unspecified matches bus 0 */ 4015 pathid = dunit; 4016 break; 4017 } else { 4018 printf("Ambiguous scbus configuration for %s%d " 4019 "bus %d, cannot wire down. The kernel " 4020 "config entry for scbus%d should " 4021 "specify a controller bus.\n" 4022 "Scbus will be assigned dynamically.\n", 4023 sim_name, sim_unit, sim_bus, dunit); 4024 break; 4025 } 4026 } 4027 4028 if (pathid == CAM_XPT_PATH_ID) 4029 pathid = xptnextfreepathid(); 4030 return (pathid); 4031} 4032 4033static const char * 4034xpt_async_string(u_int32_t async_code) 4035{ 4036 4037 switch (async_code) { 4038 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4039 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4040 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4041 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4042 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4043 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4044 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4045 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4046 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4047 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4048 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4049 case AC_CONTRACT: return ("AC_CONTRACT"); 4050 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4051 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4052 } 4053 return ("AC_UNKNOWN"); 4054} 4055 4056static int 4057xpt_async_size(u_int32_t async_code) 4058{ 4059 4060 switch (async_code) { 4061 case AC_BUS_RESET: return (0); 4062 case AC_UNSOL_RESEL: return (0); 4063 case AC_SCSI_AEN: return (0); 4064 case AC_SENT_BDR: return (0); 4065 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4066 case AC_PATH_DEREGISTERED: return (0); 4067 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4068 case AC_LOST_DEVICE: return (0); 4069 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4070 case AC_INQ_CHANGED: return (0); 4071 case AC_GETDEV_CHANGED: return (0); 4072 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4073 case AC_ADVINFO_CHANGED: return (-1); 4074 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4075 } 4076 return (0); 4077} 4078 4079static int 4080xpt_async_process_dev(struct cam_ed *device, void *arg) 4081{ 4082 union ccb *ccb = arg; 4083 struct cam_path *path = ccb->ccb_h.path; 4084 void *async_arg = ccb->casync.async_arg_ptr; 4085 u_int32_t async_code = ccb->casync.async_code; 4086 int relock; 4087 4088 if (path->device != device 4089 && path->device->lun_id != CAM_LUN_WILDCARD 4090 && device->lun_id != CAM_LUN_WILDCARD) 4091 return (1); 4092 4093 /* 4094 * The async callback could free the device. 4095 * If it is a broadcast async, it doesn't hold 4096 * device reference, so take our own reference. 4097 */ 4098 xpt_acquire_device(device); 4099 4100 /* 4101 * If async for specific device is to be delivered to 4102 * the wildcard client, take the specific device lock. 4103 * XXX: We may need a way for client to specify it. 4104 */ 4105 if ((device->lun_id == CAM_LUN_WILDCARD && 4106 path->device->lun_id != CAM_LUN_WILDCARD) || 4107 (device->target->target_id == CAM_TARGET_WILDCARD && 4108 path->target->target_id != CAM_TARGET_WILDCARD) || 4109 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4110 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4111 mtx_unlock(&device->device_mtx); 4112 xpt_path_lock(path); 4113 relock = 1; 4114 } else 4115 relock = 0; 4116 4117 (*(device->target->bus->xport->async))(async_code, 4118 device->target->bus, device->target, device, async_arg); 4119 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4120 4121 if (relock) { 4122 xpt_path_unlock(path); 4123 mtx_lock(&device->device_mtx); 4124 } 4125 xpt_release_device(device); 4126 return (1); 4127} 4128 4129static int 4130xpt_async_process_tgt(struct cam_et *target, void *arg) 4131{ 4132 union ccb *ccb = arg; 4133 struct cam_path *path = ccb->ccb_h.path; 4134 4135 if (path->target != target 4136 && path->target->target_id != CAM_TARGET_WILDCARD 4137 && target->target_id != CAM_TARGET_WILDCARD) 4138 return (1); 4139 4140 if (ccb->casync.async_code == AC_SENT_BDR) { 4141 /* Update our notion of when the last reset occurred */ 4142 microtime(&target->last_reset); 4143 } 4144 4145 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4146} 4147 4148static void 4149xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4150{ 4151 struct cam_eb *bus; 4152 struct cam_path *path; 4153 void *async_arg; 4154 u_int32_t async_code; 4155 4156 path = ccb->ccb_h.path; 4157 async_code = ccb->casync.async_code; 4158 async_arg = ccb->casync.async_arg_ptr; 4159 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4160 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4161 bus = path->bus; 4162 4163 if (async_code == AC_BUS_RESET) { 4164 /* Update our notion of when the last reset occurred */ 4165 microtime(&bus->last_reset); 4166 } 4167 4168 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4169 4170 /* 4171 * If this wasn't a fully wildcarded async, tell all 4172 * clients that want all async events. 4173 */ 4174 if (bus != xpt_periph->path->bus) { 4175 xpt_path_lock(xpt_periph->path); 4176 xpt_async_process_dev(xpt_periph->path->device, ccb); 4177 xpt_path_unlock(xpt_periph->path); 4178 } 4179 4180 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4181 xpt_release_devq(path, 1, TRUE); 4182 else 4183 xpt_release_simq(path->bus->sim, TRUE); 4184 if (ccb->casync.async_arg_size > 0) 4185 free(async_arg, M_CAMXPT); 4186 xpt_free_path(path); 4187 xpt_free_ccb(ccb); 4188} 4189 4190static void 4191xpt_async_bcast(struct async_list *async_head, 4192 u_int32_t async_code, 4193 struct cam_path *path, void *async_arg) 4194{ 4195 struct async_node *cur_entry; 4196 int lock; 4197 4198 cur_entry = SLIST_FIRST(async_head); 4199 while (cur_entry != NULL) { 4200 struct async_node *next_entry; 4201 /* 4202 * Grab the next list entry before we call the current 4203 * entry's callback. This is because the callback function 4204 * can delete its async callback entry. 4205 */ 4206 next_entry = SLIST_NEXT(cur_entry, links); 4207 if ((cur_entry->event_enable & async_code) != 0) { 4208 lock = cur_entry->event_lock; 4209 if (lock) 4210 CAM_SIM_LOCK(path->device->sim); 4211 cur_entry->callback(cur_entry->callback_arg, 4212 async_code, path, 4213 async_arg); 4214 if (lock) 4215 CAM_SIM_UNLOCK(path->device->sim); 4216 } 4217 cur_entry = next_entry; 4218 } 4219} 4220 4221void 4222xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4223{ 4224 union ccb *ccb; 4225 int size; 4226 4227 ccb = xpt_alloc_ccb_nowait(); 4228 if (ccb == NULL) { 4229 xpt_print(path, "Can't allocate CCB to send %s\n", 4230 xpt_async_string(async_code)); 4231 return; 4232 } 4233 4234 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4235 xpt_print(path, "Can't allocate path to send %s\n", 4236 xpt_async_string(async_code)); 4237 xpt_free_ccb(ccb); 4238 return; 4239 } 4240 ccb->ccb_h.path->periph = NULL; 4241 ccb->ccb_h.func_code = XPT_ASYNC; 4242 ccb->ccb_h.cbfcnp = xpt_async_process; 4243 ccb->ccb_h.flags |= CAM_UNLOCKED; 4244 ccb->casync.async_code = async_code; 4245 ccb->casync.async_arg_size = 0; 4246 size = xpt_async_size(async_code); 4247 if (size > 0 && async_arg != NULL) { 4248 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4249 if (ccb->casync.async_arg_ptr == NULL) { 4250 xpt_print(path, "Can't allocate argument to send %s\n", 4251 xpt_async_string(async_code)); 4252 xpt_free_path(ccb->ccb_h.path); 4253 xpt_free_ccb(ccb); 4254 return; 4255 } 4256 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4257 ccb->casync.async_arg_size = size; 4258 } else if (size < 0) 4259 ccb->casync.async_arg_size = size; 4260 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4261 xpt_freeze_devq(path, 1); 4262 else 4263 xpt_freeze_simq(path->bus->sim, 1); 4264 xpt_done(ccb); 4265} 4266 4267static void 4268xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4269 struct cam_et *target, struct cam_ed *device, 4270 void *async_arg) 4271{ 4272 4273 /* 4274 * We only need to handle events for real devices. 4275 */ 4276 if (target->target_id == CAM_TARGET_WILDCARD 4277 || device->lun_id == CAM_LUN_WILDCARD) 4278 return; 4279 4280 printf("%s called\n", __func__); 4281} 4282 4283static uint32_t 4284xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4285{ 4286 struct cam_devq *devq; 4287 uint32_t freeze; 4288 4289 devq = dev->sim->devq; 4290 mtx_assert(&devq->send_mtx, MA_OWNED); 4291 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4292 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4293 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4294 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4295 /* Remove frozen device from sendq. */ 4296 if (device_is_queued(dev)) 4297 camq_remove(&devq->send_queue, dev->devq_entry.index); 4298 return (freeze); 4299} 4300 4301u_int32_t 4302xpt_freeze_devq(struct cam_path *path, u_int count) 4303{ 4304 struct cam_ed *dev = path->device; 4305 struct cam_devq *devq; 4306 uint32_t freeze; 4307 4308 devq = dev->sim->devq; 4309 mtx_lock(&devq->send_mtx); 4310 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4311 freeze = xpt_freeze_devq_device(dev, count); 4312 mtx_unlock(&devq->send_mtx); 4313 return (freeze); 4314} 4315 4316u_int32_t 4317xpt_freeze_simq(struct cam_sim *sim, u_int count) 4318{ 4319 struct cam_devq *devq; 4320 uint32_t freeze; 4321 4322 devq = sim->devq; 4323 mtx_lock(&devq->send_mtx); 4324 freeze = (devq->send_queue.qfrozen_cnt += count); 4325 mtx_unlock(&devq->send_mtx); 4326 return (freeze); 4327} 4328 4329static void 4330xpt_release_devq_timeout(void *arg) 4331{ 4332 struct cam_ed *dev; 4333 struct cam_devq *devq; 4334 4335 dev = (struct cam_ed *)arg; 4336 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4337 devq = dev->sim->devq; 4338 mtx_assert(&devq->send_mtx, MA_OWNED); 4339 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4340 xpt_run_devq(devq); 4341} 4342 4343void 4344xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4345{ 4346 struct cam_ed *dev; 4347 struct cam_devq *devq; 4348 4349 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4350 count, run_queue)); 4351 dev = path->device; 4352 devq = dev->sim->devq; 4353 mtx_lock(&devq->send_mtx); 4354 if (xpt_release_devq_device(dev, count, run_queue)) 4355 xpt_run_devq(dev->sim->devq); 4356 mtx_unlock(&devq->send_mtx); 4357} 4358 4359static int 4360xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4361{ 4362 4363 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4364 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4365 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4366 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4367 if (count > dev->ccbq.queue.qfrozen_cnt) { 4368#ifdef INVARIANTS 4369 printf("xpt_release_devq(): requested %u > present %u\n", 4370 count, dev->ccbq.queue.qfrozen_cnt); 4371#endif 4372 count = dev->ccbq.queue.qfrozen_cnt; 4373 } 4374 dev->ccbq.queue.qfrozen_cnt -= count; 4375 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4376 /* 4377 * No longer need to wait for a successful 4378 * command completion. 4379 */ 4380 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4381 /* 4382 * Remove any timeouts that might be scheduled 4383 * to release this queue. 4384 */ 4385 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4386 callout_stop(&dev->callout); 4387 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4388 } 4389 /* 4390 * Now that we are unfrozen schedule the 4391 * device so any pending transactions are 4392 * run. 4393 */ 4394 xpt_schedule_devq(dev->sim->devq, dev); 4395 } else 4396 run_queue = 0; 4397 return (run_queue); 4398} 4399 4400void 4401xpt_release_simq(struct cam_sim *sim, int run_queue) 4402{ 4403 struct cam_devq *devq; 4404 4405 devq = sim->devq; 4406 mtx_lock(&devq->send_mtx); 4407 if (devq->send_queue.qfrozen_cnt <= 0) { 4408#ifdef INVARIANTS 4409 printf("xpt_release_simq: requested 1 > present %u\n", 4410 devq->send_queue.qfrozen_cnt); 4411#endif 4412 } else 4413 devq->send_queue.qfrozen_cnt--; 4414 if (devq->send_queue.qfrozen_cnt == 0) { 4415 /* 4416 * If there is a timeout scheduled to release this 4417 * sim queue, remove it. The queue frozen count is 4418 * already at 0. 4419 */ 4420 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4421 callout_stop(&sim->callout); 4422 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4423 } 4424 if (run_queue) { 4425 /* 4426 * Now that we are unfrozen run the send queue. 4427 */ 4428 xpt_run_devq(sim->devq); 4429 } 4430 } 4431 mtx_unlock(&devq->send_mtx); 4432} 4433 4434/* 4435 * XXX Appears to be unused. 4436 */ 4437static void 4438xpt_release_simq_timeout(void *arg) 4439{ 4440 struct cam_sim *sim; 4441 4442 sim = (struct cam_sim *)arg; 4443 xpt_release_simq(sim, /* run_queue */ TRUE); 4444} 4445 4446void 4447xpt_done(union ccb *done_ccb) 4448{ 4449 struct cam_doneq *queue; 4450 int run, hash; 4451 4452 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4453 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4454 return; 4455 4456 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4457 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4458 queue = &cam_doneqs[hash]; 4459 mtx_lock(&queue->cam_doneq_mtx); 4460 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4461 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4462 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4463 mtx_unlock(&queue->cam_doneq_mtx); 4464 if (run) 4465 wakeup(&queue->cam_doneq); 4466} 4467 4468void 4469xpt_done_direct(union ccb *done_ccb) 4470{ 4471 4472 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n")); 4473 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4474 return; 4475 4476 xpt_done_process(&done_ccb->ccb_h); 4477} 4478 4479union ccb * 4480xpt_alloc_ccb() 4481{ 4482 union ccb *new_ccb; 4483 4484 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4485 return (new_ccb); 4486} 4487 4488union ccb * 4489xpt_alloc_ccb_nowait() 4490{ 4491 union ccb *new_ccb; 4492 4493 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4494 return (new_ccb); 4495} 4496 4497void 4498xpt_free_ccb(union ccb *free_ccb) 4499{ 4500 free(free_ccb, M_CAMCCB); 4501} 4502 4503 4504 4505/* Private XPT functions */ 4506 4507/* 4508 * Get a CAM control block for the caller. Charge the structure to the device 4509 * referenced by the path. If we don't have sufficient resources to allocate 4510 * more ccbs, we return NULL. 4511 */ 4512static union ccb * 4513xpt_get_ccb_nowait(struct cam_periph *periph) 4514{ 4515 union ccb *new_ccb; 4516 4517 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_NOWAIT); 4518 if (new_ccb == NULL) 4519 return (NULL); 4520 periph->periph_allocated++; 4521 cam_ccbq_take_opening(&periph->path->device->ccbq); 4522 return (new_ccb); 4523} 4524 4525static union ccb * 4526xpt_get_ccb(struct cam_periph *periph) 4527{ 4528 union ccb *new_ccb; 4529 4530 cam_periph_unlock(periph); 4531 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_WAITOK); 4532 cam_periph_lock(periph); 4533 periph->periph_allocated++; 4534 cam_ccbq_take_opening(&periph->path->device->ccbq); 4535 return (new_ccb); 4536} 4537 4538union ccb * 4539cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4540{ 4541 struct ccb_hdr *ccb_h; 4542 4543 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4544 cam_periph_assert(periph, MA_OWNED); 4545 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4546 ccb_h->pinfo.priority != priority) { 4547 if (priority < periph->immediate_priority) { 4548 periph->immediate_priority = priority; 4549 xpt_run_allocq(periph, 0); 4550 } else 4551 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4552 "cgticb", 0); 4553 } 4554 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4555 return ((union ccb *)ccb_h); 4556} 4557 4558static void 4559xpt_acquire_bus(struct cam_eb *bus) 4560{ 4561 4562 xpt_lock_buses(); 4563 bus->refcount++; 4564 xpt_unlock_buses(); 4565} 4566 4567static void 4568xpt_release_bus(struct cam_eb *bus) 4569{ 4570 4571 xpt_lock_buses(); 4572 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4573 if (--bus->refcount > 0) { 4574 xpt_unlock_buses(); 4575 return; 4576 } 4577 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4578 xsoftc.bus_generation++; 4579 xpt_unlock_buses(); 4580 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4581 ("destroying bus, but target list is not empty")); 4582 cam_sim_release(bus->sim); 4583 mtx_destroy(&bus->eb_mtx); 4584 free(bus, M_CAMXPT); 4585} 4586 4587static struct cam_et * 4588xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4589{ 4590 struct cam_et *cur_target, *target; 4591 4592 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4593 mtx_assert(&bus->eb_mtx, MA_OWNED); 4594 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4595 M_NOWAIT|M_ZERO); 4596 if (target == NULL) 4597 return (NULL); 4598 4599 TAILQ_INIT(&target->ed_entries); 4600 target->bus = bus; 4601 target->target_id = target_id; 4602 target->refcount = 1; 4603 target->generation = 0; 4604 target->luns = NULL; 4605 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4606 timevalclear(&target->last_reset); 4607 /* 4608 * Hold a reference to our parent bus so it 4609 * will not go away before we do. 4610 */ 4611 bus->refcount++; 4612 4613 /* Insertion sort into our bus's target list */ 4614 cur_target = TAILQ_FIRST(&bus->et_entries); 4615 while (cur_target != NULL && cur_target->target_id < target_id) 4616 cur_target = TAILQ_NEXT(cur_target, links); 4617 if (cur_target != NULL) { 4618 TAILQ_INSERT_BEFORE(cur_target, target, links); 4619 } else { 4620 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4621 } 4622 bus->generation++; 4623 return (target); 4624} 4625 4626static void 4627xpt_acquire_target(struct cam_et *target) 4628{ 4629 struct cam_eb *bus = target->bus; 4630 4631 mtx_lock(&bus->eb_mtx); 4632 target->refcount++; 4633 mtx_unlock(&bus->eb_mtx); 4634} 4635 4636static void 4637xpt_release_target(struct cam_et *target) 4638{ 4639 struct cam_eb *bus = target->bus; 4640 4641 mtx_lock(&bus->eb_mtx); 4642 if (--target->refcount > 0) { 4643 mtx_unlock(&bus->eb_mtx); 4644 return; 4645 } 4646 TAILQ_REMOVE(&bus->et_entries, target, links); 4647 bus->generation++; 4648 mtx_unlock(&bus->eb_mtx); 4649 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4650 ("destroying target, but device list is not empty")); 4651 xpt_release_bus(bus); 4652 mtx_destroy(&target->luns_mtx); 4653 if (target->luns) 4654 free(target->luns, M_CAMXPT); 4655 free(target, M_CAMXPT); 4656} 4657 4658static struct cam_ed * 4659xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4660 lun_id_t lun_id) 4661{ 4662 struct cam_ed *device; 4663 4664 device = xpt_alloc_device(bus, target, lun_id); 4665 if (device == NULL) 4666 return (NULL); 4667 4668 device->mintags = 1; 4669 device->maxtags = 1; 4670 return (device); 4671} 4672 4673static void 4674xpt_destroy_device(void *context, int pending) 4675{ 4676 struct cam_ed *device = context; 4677 4678 mtx_lock(&device->device_mtx); 4679 mtx_destroy(&device->device_mtx); 4680 free(device, M_CAMDEV); 4681} 4682 4683struct cam_ed * 4684xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4685{ 4686 struct cam_ed *cur_device, *device; 4687 struct cam_devq *devq; 4688 cam_status status; 4689 4690 mtx_assert(&bus->eb_mtx, MA_OWNED); 4691 /* Make space for us in the device queue on our bus */ 4692 devq = bus->sim->devq; 4693 mtx_lock(&devq->send_mtx); 4694 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4695 mtx_unlock(&devq->send_mtx); 4696 if (status != CAM_REQ_CMP) 4697 return (NULL); 4698 4699 device = (struct cam_ed *)malloc(sizeof(*device), 4700 M_CAMDEV, M_NOWAIT|M_ZERO); 4701 if (device == NULL) 4702 return (NULL); 4703 4704 cam_init_pinfo(&device->devq_entry); 4705 device->target = target; 4706 device->lun_id = lun_id; 4707 device->sim = bus->sim; 4708 if (cam_ccbq_init(&device->ccbq, 4709 bus->sim->max_dev_openings) != 0) { 4710 free(device, M_CAMDEV); 4711 return (NULL); 4712 } 4713 SLIST_INIT(&device->asyncs); 4714 SLIST_INIT(&device->periphs); 4715 device->generation = 0; 4716 device->flags = CAM_DEV_UNCONFIGURED; 4717 device->tag_delay_count = 0; 4718 device->tag_saved_openings = 0; 4719 device->refcount = 1; 4720 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4721 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4722 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4723 /* 4724 * Hold a reference to our parent bus so it 4725 * will not go away before we do. 4726 */ 4727 target->refcount++; 4728 4729 cur_device = TAILQ_FIRST(&target->ed_entries); 4730 while (cur_device != NULL && cur_device->lun_id < lun_id) 4731 cur_device = TAILQ_NEXT(cur_device, links); 4732 if (cur_device != NULL) 4733 TAILQ_INSERT_BEFORE(cur_device, device, links); 4734 else 4735 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4736 target->generation++; 4737 return (device); 4738} 4739 4740void 4741xpt_acquire_device(struct cam_ed *device) 4742{ 4743 struct cam_eb *bus = device->target->bus; 4744 4745 mtx_lock(&bus->eb_mtx); 4746 device->refcount++; 4747 mtx_unlock(&bus->eb_mtx); 4748} 4749 4750void 4751xpt_release_device(struct cam_ed *device) 4752{ 4753 struct cam_eb *bus = device->target->bus; 4754 struct cam_devq *devq; 4755 4756 mtx_lock(&bus->eb_mtx); 4757 if (--device->refcount > 0) { 4758 mtx_unlock(&bus->eb_mtx); 4759 return; 4760 } 4761 4762 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4763 device->target->generation++; 4764 mtx_unlock(&bus->eb_mtx); 4765 4766 /* Release our slot in the devq */ 4767 devq = bus->sim->devq; 4768 mtx_lock(&devq->send_mtx); 4769 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4770 mtx_unlock(&devq->send_mtx); 4771 4772 KASSERT(SLIST_EMPTY(&device->periphs), 4773 ("destroying device, but periphs list is not empty")); 4774 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4775 ("destroying device while still queued for ccbs")); 4776 4777 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4778 callout_stop(&device->callout); 4779 4780 xpt_release_target(device->target); 4781 4782 cam_ccbq_fini(&device->ccbq); 4783 /* 4784 * Free allocated memory. free(9) does nothing if the 4785 * supplied pointer is NULL, so it is safe to call without 4786 * checking. 4787 */ 4788 free(device->supported_vpds, M_CAMXPT); 4789 free(device->device_id, M_CAMXPT); 4790 free(device->physpath, M_CAMXPT); 4791 free(device->rcap_buf, M_CAMXPT); 4792 free(device->serial_num, M_CAMXPT); 4793 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 4794} 4795 4796u_int32_t 4797xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4798{ 4799 int result; 4800 struct cam_ed *dev; 4801 4802 dev = path->device; 4803 mtx_lock(&dev->sim->devq->send_mtx); 4804 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4805 mtx_unlock(&dev->sim->devq->send_mtx); 4806 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4807 || (dev->inq_flags & SID_CmdQue) != 0) 4808 dev->tag_saved_openings = newopenings; 4809 return (result); 4810} 4811 4812static struct cam_eb * 4813xpt_find_bus(path_id_t path_id) 4814{ 4815 struct cam_eb *bus; 4816 4817 xpt_lock_buses(); 4818 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4819 bus != NULL; 4820 bus = TAILQ_NEXT(bus, links)) { 4821 if (bus->path_id == path_id) { 4822 bus->refcount++; 4823 break; 4824 } 4825 } 4826 xpt_unlock_buses(); 4827 return (bus); 4828} 4829 4830static struct cam_et * 4831xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4832{ 4833 struct cam_et *target; 4834 4835 mtx_assert(&bus->eb_mtx, MA_OWNED); 4836 for (target = TAILQ_FIRST(&bus->et_entries); 4837 target != NULL; 4838 target = TAILQ_NEXT(target, links)) { 4839 if (target->target_id == target_id) { 4840 target->refcount++; 4841 break; 4842 } 4843 } 4844 return (target); 4845} 4846 4847static struct cam_ed * 4848xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4849{ 4850 struct cam_ed *device; 4851 4852 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 4853 for (device = TAILQ_FIRST(&target->ed_entries); 4854 device != NULL; 4855 device = TAILQ_NEXT(device, links)) { 4856 if (device->lun_id == lun_id) { 4857 device->refcount++; 4858 break; 4859 } 4860 } 4861 return (device); 4862} 4863 4864void 4865xpt_start_tags(struct cam_path *path) 4866{ 4867 struct ccb_relsim crs; 4868 struct cam_ed *device; 4869 struct cam_sim *sim; 4870 int newopenings; 4871 4872 device = path->device; 4873 sim = path->bus->sim; 4874 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4875 xpt_freeze_devq(path, /*count*/1); 4876 device->inq_flags |= SID_CmdQue; 4877 if (device->tag_saved_openings != 0) 4878 newopenings = device->tag_saved_openings; 4879 else 4880 newopenings = min(device->maxtags, 4881 sim->max_tagged_dev_openings); 4882 xpt_dev_ccbq_resize(path, newopenings); 4883 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4884 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4885 crs.ccb_h.func_code = XPT_REL_SIMQ; 4886 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4887 crs.openings 4888 = crs.release_timeout 4889 = crs.qfrozen_cnt 4890 = 0; 4891 xpt_action((union ccb *)&crs); 4892} 4893 4894void 4895xpt_stop_tags(struct cam_path *path) 4896{ 4897 struct ccb_relsim crs; 4898 struct cam_ed *device; 4899 struct cam_sim *sim; 4900 4901 device = path->device; 4902 sim = path->bus->sim; 4903 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4904 device->tag_delay_count = 0; 4905 xpt_freeze_devq(path, /*count*/1); 4906 device->inq_flags &= ~SID_CmdQue; 4907 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4908 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4909 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4910 crs.ccb_h.func_code = XPT_REL_SIMQ; 4911 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4912 crs.openings 4913 = crs.release_timeout 4914 = crs.qfrozen_cnt 4915 = 0; 4916 xpt_action((union ccb *)&crs); 4917} 4918 4919static void 4920xpt_boot_delay(void *arg) 4921{ 4922 4923 xpt_release_boot(); 4924} 4925 4926static void 4927xpt_config(void *arg) 4928{ 4929 /* 4930 * Now that interrupts are enabled, go find our devices 4931 */ 4932 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 4933 printf("xpt_config: failed to create taskqueue thread.\n"); 4934 4935 /* Setup debugging path */ 4936 if (cam_dflags != CAM_DEBUG_NONE) { 4937 if (xpt_create_path(&cam_dpath, NULL, 4938 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4939 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4940 printf("xpt_config: xpt_create_path() failed for debug" 4941 " target %d:%d:%d, debugging disabled\n", 4942 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4943 cam_dflags = CAM_DEBUG_NONE; 4944 } 4945 } else 4946 cam_dpath = NULL; 4947 4948 periphdriver_init(1); 4949 xpt_hold_boot(); 4950 callout_init(&xsoftc.boot_callout, 1); 4951 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000, 4952 xpt_boot_delay, NULL); 4953 /* Fire up rescan thread. */ 4954 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 4955 "cam", "scanner")) { 4956 printf("xpt_config: failed to create rescan thread.\n"); 4957 } 4958} 4959 4960void 4961xpt_hold_boot(void) 4962{ 4963 xpt_lock_buses(); 4964 xsoftc.buses_to_config++; 4965 xpt_unlock_buses(); 4966} 4967 4968void 4969xpt_release_boot(void) 4970{ 4971 xpt_lock_buses(); 4972 xsoftc.buses_to_config--; 4973 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 4974 struct xpt_task *task; 4975 4976 xsoftc.buses_config_done = 1; 4977 xpt_unlock_buses(); 4978 /* Call manually because we don't have any busses */ 4979 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4980 if (task != NULL) { 4981 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4982 taskqueue_enqueue(taskqueue_thread, &task->task); 4983 } 4984 } else 4985 xpt_unlock_buses(); 4986} 4987 4988/* 4989 * If the given device only has one peripheral attached to it, and if that 4990 * peripheral is the passthrough driver, announce it. This insures that the 4991 * user sees some sort of announcement for every peripheral in their system. 4992 */ 4993static int 4994xptpassannouncefunc(struct cam_ed *device, void *arg) 4995{ 4996 struct cam_periph *periph; 4997 int i; 4998 4999 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5000 periph = SLIST_NEXT(periph, periph_links), i++); 5001 5002 periph = SLIST_FIRST(&device->periphs); 5003 if ((i == 1) 5004 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5005 xpt_announce_periph(periph, NULL); 5006 5007 return(1); 5008} 5009 5010static void 5011xpt_finishconfig_task(void *context, int pending) 5012{ 5013 5014 periphdriver_init(2); 5015 /* 5016 * Check for devices with no "standard" peripheral driver 5017 * attached. For any devices like that, announce the 5018 * passthrough driver so the user will see something. 5019 */ 5020 if (!bootverbose) 5021 xpt_for_all_devices(xptpassannouncefunc, NULL); 5022 5023 /* Release our hook so that the boot can continue. */ 5024 config_intrhook_disestablish(xsoftc.xpt_config_hook); 5025 free(xsoftc.xpt_config_hook, M_CAMXPT); 5026 xsoftc.xpt_config_hook = NULL; 5027 5028 free(context, M_CAMXPT); 5029} 5030 5031cam_status 5032xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5033 struct cam_path *path) 5034{ 5035 struct ccb_setasync csa; 5036 cam_status status; 5037 int xptpath = 0; 5038 5039 if (path == NULL) { 5040 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5041 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5042 if (status != CAM_REQ_CMP) 5043 return (status); 5044 xpt_path_lock(path); 5045 xptpath = 1; 5046 } 5047 5048 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5049 csa.ccb_h.func_code = XPT_SASYNC_CB; 5050 csa.event_enable = event; 5051 csa.callback = cbfunc; 5052 csa.callback_arg = cbarg; 5053 xpt_action((union ccb *)&csa); 5054 status = csa.ccb_h.status; 5055 5056 if (xptpath) { 5057 xpt_path_unlock(path); 5058 xpt_free_path(path); 5059 } 5060 5061 if ((status == CAM_REQ_CMP) && 5062 (csa.event_enable & AC_FOUND_DEVICE)) { 5063 /* 5064 * Get this peripheral up to date with all 5065 * the currently existing devices. 5066 */ 5067 xpt_for_all_devices(xptsetasyncfunc, &csa); 5068 } 5069 if ((status == CAM_REQ_CMP) && 5070 (csa.event_enable & AC_PATH_REGISTERED)) { 5071 /* 5072 * Get this peripheral up to date with all 5073 * the currently existing busses. 5074 */ 5075 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5076 } 5077 5078 return (status); 5079} 5080 5081static void 5082xptaction(struct cam_sim *sim, union ccb *work_ccb) 5083{ 5084 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5085 5086 switch (work_ccb->ccb_h.func_code) { 5087 /* Common cases first */ 5088 case XPT_PATH_INQ: /* Path routing inquiry */ 5089 { 5090 struct ccb_pathinq *cpi; 5091 5092 cpi = &work_ccb->cpi; 5093 cpi->version_num = 1; /* XXX??? */ 5094 cpi->hba_inquiry = 0; 5095 cpi->target_sprt = 0; 5096 cpi->hba_misc = 0; 5097 cpi->hba_eng_cnt = 0; 5098 cpi->max_target = 0; 5099 cpi->max_lun = 0; 5100 cpi->initiator_id = 0; 5101 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5102 strncpy(cpi->hba_vid, "", HBA_IDLEN); 5103 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5104 cpi->unit_number = sim->unit_number; 5105 cpi->bus_id = sim->bus_id; 5106 cpi->base_transfer_speed = 0; 5107 cpi->protocol = PROTO_UNSPECIFIED; 5108 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5109 cpi->transport = XPORT_UNSPECIFIED; 5110 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5111 cpi->ccb_h.status = CAM_REQ_CMP; 5112 xpt_done(work_ccb); 5113 break; 5114 } 5115 default: 5116 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5117 xpt_done(work_ccb); 5118 break; 5119 } 5120} 5121 5122/* 5123 * The xpt as a "controller" has no interrupt sources, so polling 5124 * is a no-op. 5125 */ 5126static void 5127xptpoll(struct cam_sim *sim) 5128{ 5129} 5130 5131void 5132xpt_lock_buses(void) 5133{ 5134 mtx_lock(&xsoftc.xpt_topo_lock); 5135} 5136 5137void 5138xpt_unlock_buses(void) 5139{ 5140 mtx_unlock(&xsoftc.xpt_topo_lock); 5141} 5142 5143struct mtx * 5144xpt_path_mtx(struct cam_path *path) 5145{ 5146 5147 return (&path->device->device_mtx); 5148} 5149 5150static void 5151xpt_done_process(struct ccb_hdr *ccb_h) 5152{ 5153 struct cam_sim *sim; 5154 struct cam_devq *devq; 5155 struct mtx *mtx = NULL; 5156 5157 if (ccb_h->flags & CAM_HIGH_POWER) { 5158 struct highpowerlist *hphead; 5159 struct cam_ed *device; 5160 5161 mtx_lock(&xsoftc.xpt_highpower_lock); 5162 hphead = &xsoftc.highpowerq; 5163 5164 device = STAILQ_FIRST(hphead); 5165 5166 /* 5167 * Increment the count since this command is done. 5168 */ 5169 xsoftc.num_highpower++; 5170 5171 /* 5172 * Any high powered commands queued up? 5173 */ 5174 if (device != NULL) { 5175 5176 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5177 mtx_unlock(&xsoftc.xpt_highpower_lock); 5178 5179 mtx_lock(&device->sim->devq->send_mtx); 5180 xpt_release_devq_device(device, 5181 /*count*/1, /*runqueue*/TRUE); 5182 mtx_unlock(&device->sim->devq->send_mtx); 5183 } else 5184 mtx_unlock(&xsoftc.xpt_highpower_lock); 5185 } 5186 5187 sim = ccb_h->path->bus->sim; 5188 5189 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5190 xpt_release_simq(sim, /*run_queue*/FALSE); 5191 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5192 } 5193 5194 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5195 && (ccb_h->status & CAM_DEV_QFRZN)) { 5196 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5197 ccb_h->status &= ~CAM_DEV_QFRZN; 5198 } 5199 5200 devq = sim->devq; 5201 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5202 struct cam_ed *dev = ccb_h->path->device; 5203 5204 mtx_lock(&devq->send_mtx); 5205 devq->send_active--; 5206 devq->send_openings++; 5207 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5208 5209 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5210 && (dev->ccbq.dev_active == 0))) { 5211 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5212 xpt_release_devq_device(dev, /*count*/1, 5213 /*run_queue*/FALSE); 5214 } 5215 5216 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5217 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5218 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5219 xpt_release_devq_device(dev, /*count*/1, 5220 /*run_queue*/FALSE); 5221 } 5222 5223 if (!device_is_queued(dev)) 5224 (void)xpt_schedule_devq(devq, dev); 5225 xpt_run_devq(devq); 5226 mtx_unlock(&devq->send_mtx); 5227 5228 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5229 mtx = xpt_path_mtx(ccb_h->path); 5230 mtx_lock(mtx); 5231 5232 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5233 && (--dev->tag_delay_count == 0)) 5234 xpt_start_tags(ccb_h->path); 5235 } 5236 } 5237 5238 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5239 if (mtx == NULL) { 5240 mtx = xpt_path_mtx(ccb_h->path); 5241 mtx_lock(mtx); 5242 } 5243 } else { 5244 if (mtx != NULL) { 5245 mtx_unlock(mtx); 5246 mtx = NULL; 5247 } 5248 } 5249 5250 /* Call the peripheral driver's callback */ 5251 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5252 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5253 if (mtx != NULL) 5254 mtx_unlock(mtx); 5255} 5256 5257void 5258xpt_done_td(void *arg) 5259{ 5260 struct cam_doneq *queue = arg; 5261 struct ccb_hdr *ccb_h; 5262 STAILQ_HEAD(, ccb_hdr) doneq; 5263 5264 STAILQ_INIT(&doneq); 5265 mtx_lock(&queue->cam_doneq_mtx); 5266 while (1) { 5267 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5268 queue->cam_doneq_sleep = 1; 5269 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5270 PRIBIO, "-", 0); 5271 queue->cam_doneq_sleep = 0; 5272 } 5273 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5274 mtx_unlock(&queue->cam_doneq_mtx); 5275 5276 THREAD_NO_SLEEPING(); 5277 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5278 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5279 xpt_done_process(ccb_h); 5280 } 5281 THREAD_SLEEPING_OK(); 5282 5283 mtx_lock(&queue->cam_doneq_mtx); 5284 } 5285} 5286 5287static void 5288camisr_runqueue(void) 5289{ 5290 struct ccb_hdr *ccb_h; 5291 struct cam_doneq *queue; 5292 int i; 5293 5294 /* Process global queues. */ 5295 for (i = 0; i < cam_num_doneqs; i++) { 5296 queue = &cam_doneqs[i]; 5297 mtx_lock(&queue->cam_doneq_mtx); 5298 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5299 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5300 mtx_unlock(&queue->cam_doneq_mtx); 5301 xpt_done_process(ccb_h); 5302 mtx_lock(&queue->cam_doneq_mtx); 5303 } 5304 mtx_unlock(&queue->cam_doneq_mtx); 5305 } 5306} 5307