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/11/sys/cam/cam_xpt.c 350804 2019-08-08 22:16:19Z 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/proc.h> 43#include <sys/sbuf.h> 44#include <sys/smp.h> 45#include <sys/taskqueue.h> 46 47#include <sys/lock.h> 48#include <sys/mutex.h> 49#include <sys/sysctl.h> 50#include <sys/kthread.h> 51 52#include <cam/cam.h> 53#include <cam/cam_ccb.h> 54#include <cam/cam_periph.h> 55#include <cam/cam_queue.h> 56#include <cam/cam_sim.h> 57#include <cam/cam_xpt.h> 58#include <cam/cam_xpt_sim.h> 59#include <cam/cam_xpt_periph.h> 60#include <cam/cam_xpt_internal.h> 61#include <cam/cam_debug.h> 62#include <cam/cam_compat.h> 63 64#include <cam/scsi/scsi_all.h> 65#include <cam/scsi/scsi_message.h> 66#include <cam/scsi/scsi_pass.h> 67 68#include <machine/md_var.h> /* geometry translation */ 69#include <machine/stdarg.h> /* for xpt_print below */ 70 71#include "opt_cam.h" 72 73/* 74 * This is the maximum number of high powered commands (e.g. start unit) 75 * that can be outstanding at a particular time. 76 */ 77#ifndef CAM_MAX_HIGHPOWER 78#define CAM_MAX_HIGHPOWER 4 79#endif 80 81/* Datastructures internal to the xpt layer */ 82MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 83MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 84MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 85MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 86 87/* Object for defering XPT actions to a taskqueue */ 88struct xpt_task { 89 struct task task; 90 void *data1; 91 uintptr_t data2; 92}; 93 94struct xpt_softc { 95 uint32_t xpt_generation; 96 97 /* number of high powered commands that can go through right now */ 98 struct mtx xpt_highpower_lock; 99 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 100 int num_highpower; 101 102 /* queue for handling async rescan requests. */ 103 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 104 int buses_to_config; 105 int buses_config_done; 106 107 /* Registered busses */ 108 TAILQ_HEAD(,cam_eb) xpt_busses; 109 u_int bus_generation; 110 111 struct intr_config_hook *xpt_config_hook; 112 113 int boot_delay; 114 struct callout boot_callout; 115 116 struct mtx xpt_topo_lock; 117 struct mtx xpt_lock; 118 struct taskqueue *xpt_taskq; 119}; 120 121typedef enum { 122 DM_RET_COPY = 0x01, 123 DM_RET_FLAG_MASK = 0x0f, 124 DM_RET_NONE = 0x00, 125 DM_RET_STOP = 0x10, 126 DM_RET_DESCEND = 0x20, 127 DM_RET_ERROR = 0x30, 128 DM_RET_ACTION_MASK = 0xf0 129} dev_match_ret; 130 131typedef enum { 132 XPT_DEPTH_BUS, 133 XPT_DEPTH_TARGET, 134 XPT_DEPTH_DEVICE, 135 XPT_DEPTH_PERIPH 136} xpt_traverse_depth; 137 138struct xpt_traverse_config { 139 xpt_traverse_depth depth; 140 void *tr_func; 141 void *tr_arg; 142}; 143 144typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 145typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 146typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 147typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 148typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 149 150/* Transport layer configuration information */ 151static struct xpt_softc xsoftc; 152 153MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF); 154 155SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 156 &xsoftc.boot_delay, 0, "Bus registration wait time"); 157SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD, 158 &xsoftc.xpt_generation, 0, "CAM peripheral generation count"); 159 160struct cam_doneq { 161 struct mtx_padalign cam_doneq_mtx; 162 STAILQ_HEAD(, ccb_hdr) cam_doneq; 163 int cam_doneq_sleep; 164}; 165 166static struct cam_doneq cam_doneqs[MAXCPU]; 167static int cam_num_doneqs; 168static struct proc *cam_proc; 169 170SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 171 &cam_num_doneqs, 0, "Number of completion queues/threads"); 172 173struct cam_periph *xpt_periph; 174 175static periph_init_t xpt_periph_init; 176 177static struct periph_driver xpt_driver = 178{ 179 xpt_periph_init, "xpt", 180 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 181 CAM_PERIPH_DRV_EARLY 182}; 183 184PERIPHDRIVER_DECLARE(xpt, xpt_driver); 185 186static d_open_t xptopen; 187static d_close_t xptclose; 188static d_ioctl_t xptioctl; 189static d_ioctl_t xptdoioctl; 190 191static struct cdevsw xpt_cdevsw = { 192 .d_version = D_VERSION, 193 .d_flags = 0, 194 .d_open = xptopen, 195 .d_close = xptclose, 196 .d_ioctl = xptioctl, 197 .d_name = "xpt", 198}; 199 200/* Storage for debugging datastructures */ 201struct cam_path *cam_dpath; 202u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 203SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN, 204 &cam_dflags, 0, "Enabled debug flags"); 205u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 206SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN, 207 &cam_debug_delay, 0, "Delay in us after each debug message"); 208 209/* Our boot-time initialization hook */ 210static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 211 212static moduledata_t cam_moduledata = { 213 "cam", 214 cam_module_event_handler, 215 NULL 216}; 217 218static int xpt_init(void *); 219 220DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 221MODULE_VERSION(cam, 1); 222 223 224static void xpt_async_bcast(struct async_list *async_head, 225 u_int32_t async_code, 226 struct cam_path *path, 227 void *async_arg); 228static path_id_t xptnextfreepathid(void); 229static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 230static union ccb *xpt_get_ccb(struct cam_periph *periph); 231static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 232static void xpt_run_allocq(struct cam_periph *periph, int sleep); 233static void xpt_run_allocq_task(void *context, int pending); 234static void xpt_run_devq(struct cam_devq *devq); 235static timeout_t xpt_release_devq_timeout; 236static void xpt_release_simq_timeout(void *arg) __unused; 237static void xpt_acquire_bus(struct cam_eb *bus); 238static void xpt_release_bus(struct cam_eb *bus); 239static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 240static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 241 int run_queue); 242static struct cam_et* 243 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 244static void xpt_acquire_target(struct cam_et *target); 245static void xpt_release_target(struct cam_et *target); 246static struct cam_eb* 247 xpt_find_bus(path_id_t path_id); 248static struct cam_et* 249 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 250static struct cam_ed* 251 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 252static void xpt_config(void *arg); 253static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 254 u_int32_t new_priority); 255static xpt_devicefunc_t xptpassannouncefunc; 256static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 257static void xptpoll(struct cam_sim *sim); 258static void camisr_runqueue(void); 259static void xpt_done_process(struct ccb_hdr *ccb_h); 260static void xpt_done_td(void *); 261static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 262 u_int num_patterns, struct cam_eb *bus); 263static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 264 u_int num_patterns, 265 struct cam_ed *device); 266static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 267 u_int num_patterns, 268 struct cam_periph *periph); 269static xpt_busfunc_t xptedtbusfunc; 270static xpt_targetfunc_t xptedttargetfunc; 271static xpt_devicefunc_t xptedtdevicefunc; 272static xpt_periphfunc_t xptedtperiphfunc; 273static xpt_pdrvfunc_t xptplistpdrvfunc; 274static xpt_periphfunc_t xptplistperiphfunc; 275static int xptedtmatch(struct ccb_dev_match *cdm); 276static int xptperiphlistmatch(struct ccb_dev_match *cdm); 277static int xptbustraverse(struct cam_eb *start_bus, 278 xpt_busfunc_t *tr_func, void *arg); 279static int xpttargettraverse(struct cam_eb *bus, 280 struct cam_et *start_target, 281 xpt_targetfunc_t *tr_func, void *arg); 282static int xptdevicetraverse(struct cam_et *target, 283 struct cam_ed *start_device, 284 xpt_devicefunc_t *tr_func, void *arg); 285static int xptperiphtraverse(struct cam_ed *device, 286 struct cam_periph *start_periph, 287 xpt_periphfunc_t *tr_func, void *arg); 288static int xptpdrvtraverse(struct periph_driver **start_pdrv, 289 xpt_pdrvfunc_t *tr_func, void *arg); 290static int xptpdperiphtraverse(struct periph_driver **pdrv, 291 struct cam_periph *start_periph, 292 xpt_periphfunc_t *tr_func, 293 void *arg); 294static xpt_busfunc_t xptdefbusfunc; 295static xpt_targetfunc_t xptdeftargetfunc; 296static xpt_devicefunc_t xptdefdevicefunc; 297static xpt_periphfunc_t xptdefperiphfunc; 298static void xpt_finishconfig_task(void *context, int pending); 299static void xpt_dev_async_default(u_int32_t async_code, 300 struct cam_eb *bus, 301 struct cam_et *target, 302 struct cam_ed *device, 303 void *async_arg); 304static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 305 struct cam_et *target, 306 lun_id_t lun_id); 307static xpt_devicefunc_t xptsetasyncfunc; 308static xpt_busfunc_t xptsetasyncbusfunc; 309static cam_status xptregister(struct cam_periph *periph, 310 void *arg); 311static const char * xpt_action_name(uint32_t action); 312static __inline int device_is_queued(struct cam_ed *device); 313 314static __inline int 315xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 316{ 317 int retval; 318 319 mtx_assert(&devq->send_mtx, MA_OWNED); 320 if ((dev->ccbq.queue.entries > 0) && 321 (dev->ccbq.dev_openings > 0) && 322 (dev->ccbq.queue.qfrozen_cnt == 0)) { 323 /* 324 * The priority of a device waiting for controller 325 * resources is that of the highest priority CCB 326 * enqueued. 327 */ 328 retval = 329 xpt_schedule_dev(&devq->send_queue, 330 &dev->devq_entry, 331 CAMQ_GET_PRIO(&dev->ccbq.queue)); 332 } else { 333 retval = 0; 334 } 335 return (retval); 336} 337 338static __inline int 339device_is_queued(struct cam_ed *device) 340{ 341 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 342} 343 344static void 345xpt_periph_init() 346{ 347 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 348} 349 350static int 351xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 352{ 353 354 /* 355 * Only allow read-write access. 356 */ 357 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 358 return(EPERM); 359 360 /* 361 * We don't allow nonblocking access. 362 */ 363 if ((flags & O_NONBLOCK) != 0) { 364 printf("%s: can't do nonblocking access\n", devtoname(dev)); 365 return(ENODEV); 366 } 367 368 return(0); 369} 370 371static int 372xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 373{ 374 375 return(0); 376} 377 378/* 379 * Don't automatically grab the xpt softc lock here even though this is going 380 * through the xpt device. The xpt device is really just a back door for 381 * accessing other devices and SIMs, so the right thing to do is to grab 382 * the appropriate SIM lock once the bus/SIM is located. 383 */ 384static int 385xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 386{ 387 int error; 388 389 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 390 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 391 } 392 return (error); 393} 394 395static int 396xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 397{ 398 int error; 399 400 error = 0; 401 402 switch(cmd) { 403 /* 404 * For the transport layer CAMIOCOMMAND ioctl, we really only want 405 * to accept CCB types that don't quite make sense to send through a 406 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 407 * in the CAM spec. 408 */ 409 case CAMIOCOMMAND: { 410 union ccb *ccb; 411 union ccb *inccb; 412 struct cam_eb *bus; 413 414 inccb = (union ccb *)addr; 415 416 if (inccb->ccb_h.flags & CAM_UNLOCKED) 417 return (EINVAL); 418 419 bus = xpt_find_bus(inccb->ccb_h.path_id); 420 if (bus == NULL) 421 return (EINVAL); 422 423 switch (inccb->ccb_h.func_code) { 424 case XPT_SCAN_BUS: 425 case XPT_RESET_BUS: 426 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 427 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 428 xpt_release_bus(bus); 429 return (EINVAL); 430 } 431 break; 432 case XPT_SCAN_TGT: 433 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 434 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 435 xpt_release_bus(bus); 436 return (EINVAL); 437 } 438 break; 439 default: 440 break; 441 } 442 443 switch(inccb->ccb_h.func_code) { 444 case XPT_SCAN_BUS: 445 case XPT_RESET_BUS: 446 case XPT_PATH_INQ: 447 case XPT_ENG_INQ: 448 case XPT_SCAN_LUN: 449 case XPT_SCAN_TGT: 450 451 ccb = xpt_alloc_ccb(); 452 453 /* 454 * Create a path using the bus, target, and lun the 455 * user passed in. 456 */ 457 if (xpt_create_path(&ccb->ccb_h.path, NULL, 458 inccb->ccb_h.path_id, 459 inccb->ccb_h.target_id, 460 inccb->ccb_h.target_lun) != 461 CAM_REQ_CMP){ 462 error = EINVAL; 463 xpt_free_ccb(ccb); 464 break; 465 } 466 /* Ensure all of our fields are correct */ 467 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 468 inccb->ccb_h.pinfo.priority); 469 xpt_merge_ccb(ccb, inccb); 470 xpt_path_lock(ccb->ccb_h.path); 471 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 472 xpt_path_unlock(ccb->ccb_h.path); 473 bcopy(ccb, inccb, sizeof(union ccb)); 474 xpt_free_path(ccb->ccb_h.path); 475 xpt_free_ccb(ccb); 476 break; 477 478 case XPT_DEBUG: { 479 union ccb ccb; 480 481 /* 482 * This is an immediate CCB, so it's okay to 483 * allocate it on the stack. 484 */ 485 486 /* 487 * Create a path using the bus, target, and lun the 488 * user passed in. 489 */ 490 if (xpt_create_path(&ccb.ccb_h.path, NULL, 491 inccb->ccb_h.path_id, 492 inccb->ccb_h.target_id, 493 inccb->ccb_h.target_lun) != 494 CAM_REQ_CMP){ 495 error = EINVAL; 496 break; 497 } 498 /* Ensure all of our fields are correct */ 499 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 500 inccb->ccb_h.pinfo.priority); 501 xpt_merge_ccb(&ccb, inccb); 502 xpt_action(&ccb); 503 bcopy(&ccb, inccb, sizeof(union ccb)); 504 xpt_free_path(ccb.ccb_h.path); 505 break; 506 507 } 508 case XPT_DEV_MATCH: { 509 struct cam_periph_map_info mapinfo; 510 struct cam_path *old_path; 511 512 /* 513 * We can't deal with physical addresses for this 514 * type of transaction. 515 */ 516 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 517 CAM_DATA_VADDR) { 518 error = EINVAL; 519 break; 520 } 521 522 /* 523 * Save this in case the caller had it set to 524 * something in particular. 525 */ 526 old_path = inccb->ccb_h.path; 527 528 /* 529 * We really don't need a path for the matching 530 * code. The path is needed because of the 531 * debugging statements in xpt_action(). They 532 * assume that the CCB has a valid path. 533 */ 534 inccb->ccb_h.path = xpt_periph->path; 535 536 bzero(&mapinfo, sizeof(mapinfo)); 537 538 /* 539 * Map the pattern and match buffers into kernel 540 * virtual address space. 541 */ 542 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS); 543 544 if (error) { 545 inccb->ccb_h.path = old_path; 546 break; 547 } 548 549 /* 550 * This is an immediate CCB, we can send it on directly. 551 */ 552 xpt_action(inccb); 553 554 /* 555 * Map the buffers back into user space. 556 */ 557 cam_periph_unmapmem(inccb, &mapinfo); 558 559 inccb->ccb_h.path = old_path; 560 561 error = 0; 562 break; 563 } 564 default: 565 error = ENOTSUP; 566 break; 567 } 568 xpt_release_bus(bus); 569 break; 570 } 571 /* 572 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 573 * with the periphal driver name and unit name filled in. The other 574 * fields don't really matter as input. The passthrough driver name 575 * ("pass"), and unit number are passed back in the ccb. The current 576 * device generation number, and the index into the device peripheral 577 * driver list, and the status are also passed back. Note that 578 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 579 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 580 * (or rather should be) impossible for the device peripheral driver 581 * list to change since we look at the whole thing in one pass, and 582 * we do it with lock protection. 583 * 584 */ 585 case CAMGETPASSTHRU: { 586 union ccb *ccb; 587 struct cam_periph *periph; 588 struct periph_driver **p_drv; 589 char *name; 590 u_int unit; 591 int base_periph_found; 592 593 ccb = (union ccb *)addr; 594 unit = ccb->cgdl.unit_number; 595 name = ccb->cgdl.periph_name; 596 base_periph_found = 0; 597 598 /* 599 * Sanity check -- make sure we don't get a null peripheral 600 * driver name. 601 */ 602 if (*ccb->cgdl.periph_name == '\0') { 603 error = EINVAL; 604 break; 605 } 606 607 /* Keep the list from changing while we traverse it */ 608 xpt_lock_buses(); 609 610 /* first find our driver in the list of drivers */ 611 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 612 if (strcmp((*p_drv)->driver_name, name) == 0) 613 break; 614 615 if (*p_drv == NULL) { 616 xpt_unlock_buses(); 617 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 618 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 619 *ccb->cgdl.periph_name = '\0'; 620 ccb->cgdl.unit_number = 0; 621 error = ENOENT; 622 break; 623 } 624 625 /* 626 * Run through every peripheral instance of this driver 627 * and check to see whether it matches the unit passed 628 * in by the user. If it does, get out of the loops and 629 * find the passthrough driver associated with that 630 * peripheral driver. 631 */ 632 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 633 periph = TAILQ_NEXT(periph, unit_links)) { 634 635 if (periph->unit_number == unit) 636 break; 637 } 638 /* 639 * If we found the peripheral driver that the user passed 640 * in, go through all of the peripheral drivers for that 641 * particular device and look for a passthrough driver. 642 */ 643 if (periph != NULL) { 644 struct cam_ed *device; 645 int i; 646 647 base_periph_found = 1; 648 device = periph->path->device; 649 for (i = 0, periph = SLIST_FIRST(&device->periphs); 650 periph != NULL; 651 periph = SLIST_NEXT(periph, periph_links), i++) { 652 /* 653 * Check to see whether we have a 654 * passthrough device or not. 655 */ 656 if (strcmp(periph->periph_name, "pass") == 0) { 657 /* 658 * Fill in the getdevlist fields. 659 */ 660 strlcpy(ccb->cgdl.periph_name, 661 periph->periph_name, 662 sizeof(ccb->cgdl.periph_name)); 663 ccb->cgdl.unit_number = 664 periph->unit_number; 665 if (SLIST_NEXT(periph, periph_links)) 666 ccb->cgdl.status = 667 CAM_GDEVLIST_MORE_DEVS; 668 else 669 ccb->cgdl.status = 670 CAM_GDEVLIST_LAST_DEVICE; 671 ccb->cgdl.generation = 672 device->generation; 673 ccb->cgdl.index = i; 674 /* 675 * Fill in some CCB header fields 676 * that the user may want. 677 */ 678 ccb->ccb_h.path_id = 679 periph->path->bus->path_id; 680 ccb->ccb_h.target_id = 681 periph->path->target->target_id; 682 ccb->ccb_h.target_lun = 683 periph->path->device->lun_id; 684 ccb->ccb_h.status = CAM_REQ_CMP; 685 break; 686 } 687 } 688 } 689 690 /* 691 * If the periph is null here, one of two things has 692 * happened. The first possibility is that we couldn't 693 * find the unit number of the particular peripheral driver 694 * that the user is asking about. e.g. the user asks for 695 * the passthrough driver for "da11". We find the list of 696 * "da" peripherals all right, but there is no unit 11. 697 * The other possibility is that we went through the list 698 * of peripheral drivers attached to the device structure, 699 * but didn't find one with the name "pass". Either way, 700 * we return ENOENT, since we couldn't find something. 701 */ 702 if (periph == NULL) { 703 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 704 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 705 *ccb->cgdl.periph_name = '\0'; 706 ccb->cgdl.unit_number = 0; 707 error = ENOENT; 708 /* 709 * It is unfortunate that this is even necessary, 710 * but there are many, many clueless users out there. 711 * If this is true, the user is looking for the 712 * passthrough driver, but doesn't have one in his 713 * kernel. 714 */ 715 if (base_periph_found == 1) { 716 printf("xptioctl: pass driver is not in the " 717 "kernel\n"); 718 printf("xptioctl: put \"device pass\" in " 719 "your kernel config file\n"); 720 } 721 } 722 xpt_unlock_buses(); 723 break; 724 } 725 default: 726 error = ENOTTY; 727 break; 728 } 729 730 return(error); 731} 732 733static int 734cam_module_event_handler(module_t mod, int what, void *arg) 735{ 736 int error; 737 738 switch (what) { 739 case MOD_LOAD: 740 if ((error = xpt_init(NULL)) != 0) 741 return (error); 742 break; 743 case MOD_UNLOAD: 744 return EBUSY; 745 default: 746 return EOPNOTSUPP; 747 } 748 749 return 0; 750} 751 752static struct xpt_proto * 753xpt_proto_find(cam_proto proto) 754{ 755 struct xpt_proto **pp; 756 757 SET_FOREACH(pp, cam_xpt_proto_set) { 758 if ((*pp)->proto == proto) 759 return *pp; 760 } 761 762 return NULL; 763} 764 765static void 766xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 767{ 768 769 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 770 xpt_free_path(done_ccb->ccb_h.path); 771 xpt_free_ccb(done_ccb); 772 } else { 773 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 774 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 775 } 776 xpt_release_boot(); 777} 778 779/* thread to handle bus rescans */ 780static void 781xpt_scanner_thread(void *dummy) 782{ 783 union ccb *ccb; 784 struct cam_path path; 785 786 xpt_lock_buses(); 787 for (;;) { 788 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 789 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 790 "-", 0); 791 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 792 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 793 xpt_unlock_buses(); 794 795 /* 796 * Since lock can be dropped inside and path freed 797 * by completion callback even before return here, 798 * take our own path copy for reference. 799 */ 800 xpt_copy_path(&path, ccb->ccb_h.path); 801 xpt_path_lock(&path); 802 xpt_action(ccb); 803 xpt_path_unlock(&path); 804 xpt_release_path(&path); 805 806 xpt_lock_buses(); 807 } 808 } 809} 810 811void 812xpt_rescan(union ccb *ccb) 813{ 814 struct ccb_hdr *hdr; 815 816 /* Prepare request */ 817 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 818 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 819 ccb->ccb_h.func_code = XPT_SCAN_BUS; 820 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 821 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 822 ccb->ccb_h.func_code = XPT_SCAN_TGT; 823 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 824 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 825 ccb->ccb_h.func_code = XPT_SCAN_LUN; 826 else { 827 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 828 xpt_free_path(ccb->ccb_h.path); 829 xpt_free_ccb(ccb); 830 return; 831 } 832 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 833 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code, 834 xpt_action_name(ccb->ccb_h.func_code))); 835 836 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 837 ccb->ccb_h.cbfcnp = xpt_rescan_done; 838 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 839 /* Don't make duplicate entries for the same paths. */ 840 xpt_lock_buses(); 841 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 842 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 843 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 844 wakeup(&xsoftc.ccb_scanq); 845 xpt_unlock_buses(); 846 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 847 xpt_free_path(ccb->ccb_h.path); 848 xpt_free_ccb(ccb); 849 return; 850 } 851 } 852 } 853 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 854 xsoftc.buses_to_config++; 855 wakeup(&xsoftc.ccb_scanq); 856 xpt_unlock_buses(); 857} 858 859/* Functions accessed by the peripheral drivers */ 860static int 861xpt_init(void *dummy) 862{ 863 struct cam_sim *xpt_sim; 864 struct cam_path *path; 865 struct cam_devq *devq; 866 cam_status status; 867 int error, i; 868 869 TAILQ_INIT(&xsoftc.xpt_busses); 870 TAILQ_INIT(&xsoftc.ccb_scanq); 871 STAILQ_INIT(&xsoftc.highpowerq); 872 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 873 874 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 875 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 876 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 877 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 878 879#ifdef CAM_BOOT_DELAY 880 /* 881 * Override this value at compile time to assist our users 882 * who don't use loader to boot a kernel. 883 */ 884 xsoftc.boot_delay = CAM_BOOT_DELAY; 885#endif 886 /* 887 * The xpt layer is, itself, the equivalent of a SIM. 888 * Allow 16 ccbs in the ccb pool for it. This should 889 * give decent parallelism when we probe busses and 890 * perform other XPT functions. 891 */ 892 devq = cam_simq_alloc(16); 893 xpt_sim = cam_sim_alloc(xptaction, 894 xptpoll, 895 "xpt", 896 /*softc*/NULL, 897 /*unit*/0, 898 /*mtx*/&xsoftc.xpt_lock, 899 /*max_dev_transactions*/0, 900 /*max_tagged_dev_transactions*/0, 901 devq); 902 if (xpt_sim == NULL) 903 return (ENOMEM); 904 905 mtx_lock(&xsoftc.xpt_lock); 906 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 907 mtx_unlock(&xsoftc.xpt_lock); 908 printf("xpt_init: xpt_bus_register failed with status %#x," 909 " failing attach\n", status); 910 return (EINVAL); 911 } 912 mtx_unlock(&xsoftc.xpt_lock); 913 914 /* 915 * Looking at the XPT from the SIM layer, the XPT is 916 * the equivalent of a peripheral driver. Allocate 917 * a peripheral driver entry for us. 918 */ 919 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 920 CAM_TARGET_WILDCARD, 921 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 922 printf("xpt_init: xpt_create_path failed with status %#x," 923 " failing attach\n", status); 924 return (EINVAL); 925 } 926 xpt_path_lock(path); 927 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 928 path, NULL, 0, xpt_sim); 929 xpt_path_unlock(path); 930 xpt_free_path(path); 931 932 if (cam_num_doneqs < 1) 933 cam_num_doneqs = 1 + mp_ncpus / 6; 934 else if (cam_num_doneqs > MAXCPU) 935 cam_num_doneqs = MAXCPU; 936 for (i = 0; i < cam_num_doneqs; i++) { 937 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 938 MTX_DEF); 939 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 940 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 941 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 942 if (error != 0) { 943 cam_num_doneqs = i; 944 break; 945 } 946 } 947 if (cam_num_doneqs < 1) { 948 printf("xpt_init: Cannot init completion queues " 949 "- failing attach\n"); 950 return (ENOMEM); 951 } 952 /* 953 * Register a callback for when interrupts are enabled. 954 */ 955 xsoftc.xpt_config_hook = 956 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 957 M_CAMXPT, M_NOWAIT | M_ZERO); 958 if (xsoftc.xpt_config_hook == NULL) { 959 printf("xpt_init: Cannot malloc config hook " 960 "- failing attach\n"); 961 return (ENOMEM); 962 } 963 xsoftc.xpt_config_hook->ich_func = xpt_config; 964 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 965 free (xsoftc.xpt_config_hook, M_CAMXPT); 966 printf("xpt_init: config_intrhook_establish failed " 967 "- failing attach\n"); 968 } 969 970 return (0); 971} 972 973static cam_status 974xptregister(struct cam_periph *periph, void *arg) 975{ 976 struct cam_sim *xpt_sim; 977 978 if (periph == NULL) { 979 printf("xptregister: periph was NULL!!\n"); 980 return(CAM_REQ_CMP_ERR); 981 } 982 983 xpt_sim = (struct cam_sim *)arg; 984 xpt_sim->softc = periph; 985 xpt_periph = periph; 986 periph->softc = NULL; 987 988 return(CAM_REQ_CMP); 989} 990 991int32_t 992xpt_add_periph(struct cam_periph *periph) 993{ 994 struct cam_ed *device; 995 int32_t status; 996 997 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 998 device = periph->path->device; 999 status = CAM_REQ_CMP; 1000 if (device != NULL) { 1001 mtx_lock(&device->target->bus->eb_mtx); 1002 device->generation++; 1003 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 1004 mtx_unlock(&device->target->bus->eb_mtx); 1005 atomic_add_32(&xsoftc.xpt_generation, 1); 1006 } 1007 1008 return (status); 1009} 1010 1011void 1012xpt_remove_periph(struct cam_periph *periph) 1013{ 1014 struct cam_ed *device; 1015 1016 device = periph->path->device; 1017 if (device != NULL) { 1018 mtx_lock(&device->target->bus->eb_mtx); 1019 device->generation++; 1020 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 1021 mtx_unlock(&device->target->bus->eb_mtx); 1022 atomic_add_32(&xsoftc.xpt_generation, 1); 1023 } 1024} 1025 1026 1027void 1028xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1029{ 1030 struct cam_path *path = periph->path; 1031 struct xpt_proto *proto; 1032 1033 cam_periph_assert(periph, MA_OWNED); 1034 periph->flags |= CAM_PERIPH_ANNOUNCED; 1035 1036 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1037 periph->periph_name, periph->unit_number, 1038 path->bus->sim->sim_name, 1039 path->bus->sim->unit_number, 1040 path->bus->sim->bus_id, 1041 path->bus->path_id, 1042 path->target->target_id, 1043 (uintmax_t)path->device->lun_id); 1044 printf("%s%d: ", periph->periph_name, periph->unit_number); 1045 proto = xpt_proto_find(path->device->protocol); 1046 if (proto) 1047 proto->ops->announce(path->device); 1048 else 1049 printf("%s%d: Unknown protocol device %d\n", 1050 periph->periph_name, periph->unit_number, 1051 path->device->protocol); 1052 if (path->device->serial_num_len > 0) { 1053 /* Don't wrap the screen - print only the first 60 chars */ 1054 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1055 periph->unit_number, path->device->serial_num); 1056 } 1057 /* Announce transport details. */ 1058 path->bus->xport->ops->announce(periph); 1059 /* Announce command queueing. */ 1060 if (path->device->inq_flags & SID_CmdQue 1061 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1062 printf("%s%d: Command Queueing enabled\n", 1063 periph->periph_name, periph->unit_number); 1064 } 1065 /* Announce caller's details if they've passed in. */ 1066 if (announce_string != NULL) 1067 printf("%s%d: %s\n", periph->periph_name, 1068 periph->unit_number, announce_string); 1069} 1070 1071void 1072xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1073{ 1074 if (quirks != 0) { 1075 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1076 periph->unit_number, quirks, bit_string); 1077 } 1078} 1079 1080void 1081xpt_denounce_periph(struct cam_periph *periph) 1082{ 1083 struct cam_path *path = periph->path; 1084 struct xpt_proto *proto; 1085 1086 cam_periph_assert(periph, MA_OWNED); 1087 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1088 periph->periph_name, periph->unit_number, 1089 path->bus->sim->sim_name, 1090 path->bus->sim->unit_number, 1091 path->bus->sim->bus_id, 1092 path->bus->path_id, 1093 path->target->target_id, 1094 (uintmax_t)path->device->lun_id); 1095 printf("%s%d: ", periph->periph_name, periph->unit_number); 1096 proto = xpt_proto_find(path->device->protocol); 1097 if (proto) 1098 proto->ops->denounce(path->device); 1099 else 1100 printf("%s%d: Unknown protocol device %d\n", 1101 periph->periph_name, periph->unit_number, 1102 path->device->protocol); 1103 if (path->device->serial_num_len > 0) 1104 printf(" s/n %.60s", path->device->serial_num); 1105 printf(" detached\n"); 1106} 1107 1108 1109int 1110xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1111{ 1112 int ret = -1, l, o; 1113 struct ccb_dev_advinfo cdai; 1114 struct scsi_vpd_device_id *did; 1115 struct scsi_vpd_id_descriptor *idd; 1116 1117 xpt_path_assert(path, MA_OWNED); 1118 1119 memset(&cdai, 0, sizeof(cdai)); 1120 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1121 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1122 cdai.flags = CDAI_FLAG_NONE; 1123 cdai.bufsiz = len; 1124 cdai.buf = buf; 1125 1126 if (!strcmp(attr, "GEOM::ident")) 1127 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1128 else if (!strcmp(attr, "GEOM::physpath")) 1129 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1130 else if (strcmp(attr, "GEOM::lunid") == 0 || 1131 strcmp(attr, "GEOM::lunname") == 0) { 1132 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1133 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1134 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT); 1135 if (cdai.buf == NULL) { 1136 ret = ENOMEM; 1137 goto out; 1138 } 1139 } else 1140 goto out; 1141 1142 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1143 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1144 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1145 if (cdai.provsiz == 0) 1146 goto out; 1147 switch(cdai.buftype) { 1148 case CDAI_TYPE_SCSI_DEVID: 1149 did = (struct scsi_vpd_device_id *)cdai.buf; 1150 if (strcmp(attr, "GEOM::lunid") == 0) { 1151 idd = scsi_get_devid(did, cdai.provsiz, 1152 scsi_devid_is_lun_naa); 1153 if (idd == NULL) 1154 idd = scsi_get_devid(did, cdai.provsiz, 1155 scsi_devid_is_lun_eui64); 1156 if (idd == NULL) 1157 idd = scsi_get_devid(did, cdai.provsiz, 1158 scsi_devid_is_lun_uuid); 1159 if (idd == NULL) 1160 idd = scsi_get_devid(did, cdai.provsiz, 1161 scsi_devid_is_lun_md5); 1162 } else 1163 idd = NULL; 1164 1165 if (idd == NULL) 1166 idd = scsi_get_devid(did, cdai.provsiz, 1167 scsi_devid_is_lun_t10); 1168 if (idd == NULL) 1169 idd = scsi_get_devid(did, cdai.provsiz, 1170 scsi_devid_is_lun_name); 1171 if (idd == NULL) 1172 break; 1173 1174 ret = 0; 1175 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == 1176 SVPD_ID_CODESET_ASCII) { 1177 if (idd->length < len) { 1178 for (l = 0; l < idd->length; l++) 1179 buf[l] = idd->identifier[l] ? 1180 idd->identifier[l] : ' '; 1181 buf[l] = 0; 1182 } else 1183 ret = EFAULT; 1184 break; 1185 } 1186 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == 1187 SVPD_ID_CODESET_UTF8) { 1188 l = strnlen(idd->identifier, idd->length); 1189 if (l < len) { 1190 bcopy(idd->identifier, buf, l); 1191 buf[l] = 0; 1192 } else 1193 ret = EFAULT; 1194 break; 1195 } 1196 if ((idd->id_type & SVPD_ID_TYPE_MASK) == 1197 SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) { 1198 if ((idd->length - 2) * 2 + 4 >= len) { 1199 ret = EFAULT; 1200 break; 1201 } 1202 for (l = 2, o = 0; l < idd->length; l++) { 1203 if (l == 6 || l == 8 || l == 10 || l == 12) 1204 o += sprintf(buf + o, "-"); 1205 o += sprintf(buf + o, "%02x", 1206 idd->identifier[l]); 1207 } 1208 break; 1209 } 1210 if (idd->length * 2 < len) { 1211 for (l = 0; l < idd->length; l++) 1212 sprintf(buf + l * 2, "%02x", 1213 idd->identifier[l]); 1214 } else 1215 ret = EFAULT; 1216 break; 1217 default: 1218 if (cdai.provsiz < len) { 1219 cdai.buf[cdai.provsiz] = 0; 1220 ret = 0; 1221 } else 1222 ret = EFAULT; 1223 break; 1224 } 1225 1226out: 1227 if ((char *)cdai.buf != buf) 1228 free(cdai.buf, M_CAMXPT); 1229 return ret; 1230} 1231 1232static dev_match_ret 1233xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1234 struct cam_eb *bus) 1235{ 1236 dev_match_ret retval; 1237 u_int i; 1238 1239 retval = DM_RET_NONE; 1240 1241 /* 1242 * If we aren't given something to match against, that's an error. 1243 */ 1244 if (bus == NULL) 1245 return(DM_RET_ERROR); 1246 1247 /* 1248 * If there are no match entries, then this bus matches no 1249 * matter what. 1250 */ 1251 if ((patterns == NULL) || (num_patterns == 0)) 1252 return(DM_RET_DESCEND | DM_RET_COPY); 1253 1254 for (i = 0; i < num_patterns; i++) { 1255 struct bus_match_pattern *cur_pattern; 1256 1257 /* 1258 * If the pattern in question isn't for a bus node, we 1259 * aren't interested. However, we do indicate to the 1260 * calling routine that we should continue descending the 1261 * tree, since the user wants to match against lower-level 1262 * EDT elements. 1263 */ 1264 if (patterns[i].type != DEV_MATCH_BUS) { 1265 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1266 retval |= DM_RET_DESCEND; 1267 continue; 1268 } 1269 1270 cur_pattern = &patterns[i].pattern.bus_pattern; 1271 1272 /* 1273 * If they want to match any bus node, we give them any 1274 * device node. 1275 */ 1276 if (cur_pattern->flags == BUS_MATCH_ANY) { 1277 /* set the copy flag */ 1278 retval |= DM_RET_COPY; 1279 1280 /* 1281 * If we've already decided on an action, go ahead 1282 * and return. 1283 */ 1284 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1285 return(retval); 1286 } 1287 1288 /* 1289 * Not sure why someone would do this... 1290 */ 1291 if (cur_pattern->flags == BUS_MATCH_NONE) 1292 continue; 1293 1294 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1295 && (cur_pattern->path_id != bus->path_id)) 1296 continue; 1297 1298 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1299 && (cur_pattern->bus_id != bus->sim->bus_id)) 1300 continue; 1301 1302 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1303 && (cur_pattern->unit_number != bus->sim->unit_number)) 1304 continue; 1305 1306 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1307 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1308 DEV_IDLEN) != 0)) 1309 continue; 1310 1311 /* 1312 * If we get to this point, the user definitely wants 1313 * information on this bus. So tell the caller to copy the 1314 * data out. 1315 */ 1316 retval |= DM_RET_COPY; 1317 1318 /* 1319 * If the return action has been set to descend, then we 1320 * know that we've already seen a non-bus matching 1321 * expression, therefore we need to further descend the tree. 1322 * This won't change by continuing around the loop, so we 1323 * go ahead and return. If we haven't seen a non-bus 1324 * matching expression, we keep going around the loop until 1325 * we exhaust the matching expressions. We'll set the stop 1326 * flag once we fall out of the loop. 1327 */ 1328 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1329 return(retval); 1330 } 1331 1332 /* 1333 * If the return action hasn't been set to descend yet, that means 1334 * we haven't seen anything other than bus matching patterns. So 1335 * tell the caller to stop descending the tree -- the user doesn't 1336 * want to match against lower level tree elements. 1337 */ 1338 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1339 retval |= DM_RET_STOP; 1340 1341 return(retval); 1342} 1343 1344static dev_match_ret 1345xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1346 struct cam_ed *device) 1347{ 1348 dev_match_ret retval; 1349 u_int i; 1350 1351 retval = DM_RET_NONE; 1352 1353 /* 1354 * If we aren't given something to match against, that's an error. 1355 */ 1356 if (device == NULL) 1357 return(DM_RET_ERROR); 1358 1359 /* 1360 * If there are no match entries, then this device matches no 1361 * matter what. 1362 */ 1363 if ((patterns == NULL) || (num_patterns == 0)) 1364 return(DM_RET_DESCEND | DM_RET_COPY); 1365 1366 for (i = 0; i < num_patterns; i++) { 1367 struct device_match_pattern *cur_pattern; 1368 struct scsi_vpd_device_id *device_id_page; 1369 1370 /* 1371 * If the pattern in question isn't for a device node, we 1372 * aren't interested. 1373 */ 1374 if (patterns[i].type != DEV_MATCH_DEVICE) { 1375 if ((patterns[i].type == DEV_MATCH_PERIPH) 1376 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1377 retval |= DM_RET_DESCEND; 1378 continue; 1379 } 1380 1381 cur_pattern = &patterns[i].pattern.device_pattern; 1382 1383 /* Error out if mutually exclusive options are specified. */ 1384 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1385 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1386 return(DM_RET_ERROR); 1387 1388 /* 1389 * If they want to match any device node, we give them any 1390 * device node. 1391 */ 1392 if (cur_pattern->flags == DEV_MATCH_ANY) 1393 goto copy_dev_node; 1394 1395 /* 1396 * Not sure why someone would do this... 1397 */ 1398 if (cur_pattern->flags == DEV_MATCH_NONE) 1399 continue; 1400 1401 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1402 && (cur_pattern->path_id != device->target->bus->path_id)) 1403 continue; 1404 1405 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1406 && (cur_pattern->target_id != device->target->target_id)) 1407 continue; 1408 1409 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1410 && (cur_pattern->target_lun != device->lun_id)) 1411 continue; 1412 1413 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1414 && (cam_quirkmatch((caddr_t)&device->inq_data, 1415 (caddr_t)&cur_pattern->data.inq_pat, 1416 1, sizeof(cur_pattern->data.inq_pat), 1417 scsi_static_inquiry_match) == NULL)) 1418 continue; 1419 1420 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1421 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1422 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1423 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1424 device->device_id_len 1425 - SVPD_DEVICE_ID_HDR_LEN, 1426 cur_pattern->data.devid_pat.id, 1427 cur_pattern->data.devid_pat.id_len) != 0)) 1428 continue; 1429 1430copy_dev_node: 1431 /* 1432 * If we get to this point, the user definitely wants 1433 * information on this device. So tell the caller to copy 1434 * the data out. 1435 */ 1436 retval |= DM_RET_COPY; 1437 1438 /* 1439 * If the return action has been set to descend, then we 1440 * know that we've already seen a peripheral matching 1441 * expression, therefore we need to further descend the tree. 1442 * This won't change by continuing around the loop, so we 1443 * go ahead and return. If we haven't seen a peripheral 1444 * matching expression, we keep going around the loop until 1445 * we exhaust the matching expressions. We'll set the stop 1446 * flag once we fall out of the loop. 1447 */ 1448 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1449 return(retval); 1450 } 1451 1452 /* 1453 * If the return action hasn't been set to descend yet, that means 1454 * we haven't seen any peripheral matching patterns. So tell the 1455 * caller to stop descending the tree -- the user doesn't want to 1456 * match against lower level tree elements. 1457 */ 1458 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1459 retval |= DM_RET_STOP; 1460 1461 return(retval); 1462} 1463 1464/* 1465 * Match a single peripheral against any number of match patterns. 1466 */ 1467static dev_match_ret 1468xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1469 struct cam_periph *periph) 1470{ 1471 dev_match_ret retval; 1472 u_int i; 1473 1474 /* 1475 * If we aren't given something to match against, that's an error. 1476 */ 1477 if (periph == NULL) 1478 return(DM_RET_ERROR); 1479 1480 /* 1481 * If there are no match entries, then this peripheral matches no 1482 * matter what. 1483 */ 1484 if ((patterns == NULL) || (num_patterns == 0)) 1485 return(DM_RET_STOP | DM_RET_COPY); 1486 1487 /* 1488 * There aren't any nodes below a peripheral node, so there's no 1489 * reason to descend the tree any further. 1490 */ 1491 retval = DM_RET_STOP; 1492 1493 for (i = 0; i < num_patterns; i++) { 1494 struct periph_match_pattern *cur_pattern; 1495 1496 /* 1497 * If the pattern in question isn't for a peripheral, we 1498 * aren't interested. 1499 */ 1500 if (patterns[i].type != DEV_MATCH_PERIPH) 1501 continue; 1502 1503 cur_pattern = &patterns[i].pattern.periph_pattern; 1504 1505 /* 1506 * If they want to match on anything, then we will do so. 1507 */ 1508 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1509 /* set the copy flag */ 1510 retval |= DM_RET_COPY; 1511 1512 /* 1513 * We've already set the return action to stop, 1514 * since there are no nodes below peripherals in 1515 * the tree. 1516 */ 1517 return(retval); 1518 } 1519 1520 /* 1521 * Not sure why someone would do this... 1522 */ 1523 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1524 continue; 1525 1526 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1527 && (cur_pattern->path_id != periph->path->bus->path_id)) 1528 continue; 1529 1530 /* 1531 * For the target and lun id's, we have to make sure the 1532 * target and lun pointers aren't NULL. The xpt peripheral 1533 * has a wildcard target and device. 1534 */ 1535 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1536 && ((periph->path->target == NULL) 1537 ||(cur_pattern->target_id != periph->path->target->target_id))) 1538 continue; 1539 1540 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1541 && ((periph->path->device == NULL) 1542 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1543 continue; 1544 1545 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1546 && (cur_pattern->unit_number != periph->unit_number)) 1547 continue; 1548 1549 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1550 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1551 DEV_IDLEN) != 0)) 1552 continue; 1553 1554 /* 1555 * If we get to this point, the user definitely wants 1556 * information on this peripheral. So tell the caller to 1557 * copy the data out. 1558 */ 1559 retval |= DM_RET_COPY; 1560 1561 /* 1562 * The return action has already been set to stop, since 1563 * peripherals don't have any nodes below them in the EDT. 1564 */ 1565 return(retval); 1566 } 1567 1568 /* 1569 * If we get to this point, the peripheral that was passed in 1570 * doesn't match any of the patterns. 1571 */ 1572 return(retval); 1573} 1574 1575static int 1576xptedtbusfunc(struct cam_eb *bus, void *arg) 1577{ 1578 struct ccb_dev_match *cdm; 1579 struct cam_et *target; 1580 dev_match_ret retval; 1581 1582 cdm = (struct ccb_dev_match *)arg; 1583 1584 /* 1585 * If our position is for something deeper in the tree, that means 1586 * that we've already seen this node. So, we keep going down. 1587 */ 1588 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1589 && (cdm->pos.cookie.bus == bus) 1590 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1591 && (cdm->pos.cookie.target != NULL)) 1592 retval = DM_RET_DESCEND; 1593 else 1594 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1595 1596 /* 1597 * If we got an error, bail out of the search. 1598 */ 1599 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1600 cdm->status = CAM_DEV_MATCH_ERROR; 1601 return(0); 1602 } 1603 1604 /* 1605 * If the copy flag is set, copy this bus out. 1606 */ 1607 if (retval & DM_RET_COPY) { 1608 int spaceleft, j; 1609 1610 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1611 sizeof(struct dev_match_result)); 1612 1613 /* 1614 * If we don't have enough space to put in another 1615 * match result, save our position and tell the 1616 * user there are more devices to check. 1617 */ 1618 if (spaceleft < sizeof(struct dev_match_result)) { 1619 bzero(&cdm->pos, sizeof(cdm->pos)); 1620 cdm->pos.position_type = 1621 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1622 1623 cdm->pos.cookie.bus = bus; 1624 cdm->pos.generations[CAM_BUS_GENERATION]= 1625 xsoftc.bus_generation; 1626 cdm->status = CAM_DEV_MATCH_MORE; 1627 return(0); 1628 } 1629 j = cdm->num_matches; 1630 cdm->num_matches++; 1631 cdm->matches[j].type = DEV_MATCH_BUS; 1632 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1633 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1634 cdm->matches[j].result.bus_result.unit_number = 1635 bus->sim->unit_number; 1636 strlcpy(cdm->matches[j].result.bus_result.dev_name, 1637 bus->sim->sim_name, 1638 sizeof(cdm->matches[j].result.bus_result.dev_name)); 1639 } 1640 1641 /* 1642 * If the user is only interested in busses, there's no 1643 * reason to descend to the next level in the tree. 1644 */ 1645 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1646 return(1); 1647 1648 /* 1649 * If there is a target generation recorded, check it to 1650 * make sure the target list hasn't changed. 1651 */ 1652 mtx_lock(&bus->eb_mtx); 1653 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1654 && (cdm->pos.cookie.bus == bus) 1655 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1656 && (cdm->pos.cookie.target != NULL)) { 1657 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1658 bus->generation)) { 1659 mtx_unlock(&bus->eb_mtx); 1660 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1661 return (0); 1662 } 1663 target = (struct cam_et *)cdm->pos.cookie.target; 1664 target->refcount++; 1665 } else 1666 target = NULL; 1667 mtx_unlock(&bus->eb_mtx); 1668 1669 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1670} 1671 1672static int 1673xptedttargetfunc(struct cam_et *target, void *arg) 1674{ 1675 struct ccb_dev_match *cdm; 1676 struct cam_eb *bus; 1677 struct cam_ed *device; 1678 1679 cdm = (struct ccb_dev_match *)arg; 1680 bus = target->bus; 1681 1682 /* 1683 * If there is a device list generation recorded, check it to 1684 * make sure the device list hasn't changed. 1685 */ 1686 mtx_lock(&bus->eb_mtx); 1687 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1688 && (cdm->pos.cookie.bus == bus) 1689 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1690 && (cdm->pos.cookie.target == target) 1691 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1692 && (cdm->pos.cookie.device != NULL)) { 1693 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1694 target->generation) { 1695 mtx_unlock(&bus->eb_mtx); 1696 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1697 return(0); 1698 } 1699 device = (struct cam_ed *)cdm->pos.cookie.device; 1700 device->refcount++; 1701 } else 1702 device = NULL; 1703 mtx_unlock(&bus->eb_mtx); 1704 1705 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1706} 1707 1708static int 1709xptedtdevicefunc(struct cam_ed *device, void *arg) 1710{ 1711 struct cam_eb *bus; 1712 struct cam_periph *periph; 1713 struct ccb_dev_match *cdm; 1714 dev_match_ret retval; 1715 1716 cdm = (struct ccb_dev_match *)arg; 1717 bus = device->target->bus; 1718 1719 /* 1720 * If our position is for something deeper in the tree, that means 1721 * that we've already seen this node. So, we keep going down. 1722 */ 1723 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1724 && (cdm->pos.cookie.device == device) 1725 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1726 && (cdm->pos.cookie.periph != NULL)) 1727 retval = DM_RET_DESCEND; 1728 else 1729 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1730 device); 1731 1732 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1733 cdm->status = CAM_DEV_MATCH_ERROR; 1734 return(0); 1735 } 1736 1737 /* 1738 * If the copy flag is set, copy this device out. 1739 */ 1740 if (retval & DM_RET_COPY) { 1741 int spaceleft, j; 1742 1743 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1744 sizeof(struct dev_match_result)); 1745 1746 /* 1747 * If we don't have enough space to put in another 1748 * match result, save our position and tell the 1749 * user there are more devices to check. 1750 */ 1751 if (spaceleft < sizeof(struct dev_match_result)) { 1752 bzero(&cdm->pos, sizeof(cdm->pos)); 1753 cdm->pos.position_type = 1754 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1755 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1756 1757 cdm->pos.cookie.bus = device->target->bus; 1758 cdm->pos.generations[CAM_BUS_GENERATION]= 1759 xsoftc.bus_generation; 1760 cdm->pos.cookie.target = device->target; 1761 cdm->pos.generations[CAM_TARGET_GENERATION] = 1762 device->target->bus->generation; 1763 cdm->pos.cookie.device = device; 1764 cdm->pos.generations[CAM_DEV_GENERATION] = 1765 device->target->generation; 1766 cdm->status = CAM_DEV_MATCH_MORE; 1767 return(0); 1768 } 1769 j = cdm->num_matches; 1770 cdm->num_matches++; 1771 cdm->matches[j].type = DEV_MATCH_DEVICE; 1772 cdm->matches[j].result.device_result.path_id = 1773 device->target->bus->path_id; 1774 cdm->matches[j].result.device_result.target_id = 1775 device->target->target_id; 1776 cdm->matches[j].result.device_result.target_lun = 1777 device->lun_id; 1778 cdm->matches[j].result.device_result.protocol = 1779 device->protocol; 1780 bcopy(&device->inq_data, 1781 &cdm->matches[j].result.device_result.inq_data, 1782 sizeof(struct scsi_inquiry_data)); 1783 bcopy(&device->ident_data, 1784 &cdm->matches[j].result.device_result.ident_data, 1785 sizeof(struct ata_params)); 1786 1787 /* Let the user know whether this device is unconfigured */ 1788 if (device->flags & CAM_DEV_UNCONFIGURED) 1789 cdm->matches[j].result.device_result.flags = 1790 DEV_RESULT_UNCONFIGURED; 1791 else 1792 cdm->matches[j].result.device_result.flags = 1793 DEV_RESULT_NOFLAG; 1794 } 1795 1796 /* 1797 * If the user isn't interested in peripherals, don't descend 1798 * the tree any further. 1799 */ 1800 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1801 return(1); 1802 1803 /* 1804 * If there is a peripheral list generation recorded, make sure 1805 * it hasn't changed. 1806 */ 1807 xpt_lock_buses(); 1808 mtx_lock(&bus->eb_mtx); 1809 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1810 && (cdm->pos.cookie.bus == bus) 1811 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1812 && (cdm->pos.cookie.target == device->target) 1813 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1814 && (cdm->pos.cookie.device == device) 1815 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1816 && (cdm->pos.cookie.periph != NULL)) { 1817 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1818 device->generation) { 1819 mtx_unlock(&bus->eb_mtx); 1820 xpt_unlock_buses(); 1821 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1822 return(0); 1823 } 1824 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1825 periph->refcount++; 1826 } else 1827 periph = NULL; 1828 mtx_unlock(&bus->eb_mtx); 1829 xpt_unlock_buses(); 1830 1831 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1832} 1833 1834static int 1835xptedtperiphfunc(struct cam_periph *periph, void *arg) 1836{ 1837 struct ccb_dev_match *cdm; 1838 dev_match_ret retval; 1839 1840 cdm = (struct ccb_dev_match *)arg; 1841 1842 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1843 1844 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1845 cdm->status = CAM_DEV_MATCH_ERROR; 1846 return(0); 1847 } 1848 1849 /* 1850 * If the copy flag is set, copy this peripheral out. 1851 */ 1852 if (retval & DM_RET_COPY) { 1853 int spaceleft, j; 1854 size_t l; 1855 1856 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1857 sizeof(struct dev_match_result)); 1858 1859 /* 1860 * If we don't have enough space to put in another 1861 * match result, save our position and tell the 1862 * user there are more devices to check. 1863 */ 1864 if (spaceleft < sizeof(struct dev_match_result)) { 1865 bzero(&cdm->pos, sizeof(cdm->pos)); 1866 cdm->pos.position_type = 1867 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1868 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1869 CAM_DEV_POS_PERIPH; 1870 1871 cdm->pos.cookie.bus = periph->path->bus; 1872 cdm->pos.generations[CAM_BUS_GENERATION]= 1873 xsoftc.bus_generation; 1874 cdm->pos.cookie.target = periph->path->target; 1875 cdm->pos.generations[CAM_TARGET_GENERATION] = 1876 periph->path->bus->generation; 1877 cdm->pos.cookie.device = periph->path->device; 1878 cdm->pos.generations[CAM_DEV_GENERATION] = 1879 periph->path->target->generation; 1880 cdm->pos.cookie.periph = periph; 1881 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1882 periph->path->device->generation; 1883 cdm->status = CAM_DEV_MATCH_MORE; 1884 return(0); 1885 } 1886 1887 j = cdm->num_matches; 1888 cdm->num_matches++; 1889 cdm->matches[j].type = DEV_MATCH_PERIPH; 1890 cdm->matches[j].result.periph_result.path_id = 1891 periph->path->bus->path_id; 1892 cdm->matches[j].result.periph_result.target_id = 1893 periph->path->target->target_id; 1894 cdm->matches[j].result.periph_result.target_lun = 1895 periph->path->device->lun_id; 1896 cdm->matches[j].result.periph_result.unit_number = 1897 periph->unit_number; 1898 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 1899 strlcpy(cdm->matches[j].result.periph_result.periph_name, 1900 periph->periph_name, l); 1901 } 1902 1903 return(1); 1904} 1905 1906static int 1907xptedtmatch(struct ccb_dev_match *cdm) 1908{ 1909 struct cam_eb *bus; 1910 int ret; 1911 1912 cdm->num_matches = 0; 1913 1914 /* 1915 * Check the bus list generation. If it has changed, the user 1916 * needs to reset everything and start over. 1917 */ 1918 xpt_lock_buses(); 1919 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1920 && (cdm->pos.cookie.bus != NULL)) { 1921 if (cdm->pos.generations[CAM_BUS_GENERATION] != 1922 xsoftc.bus_generation) { 1923 xpt_unlock_buses(); 1924 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1925 return(0); 1926 } 1927 bus = (struct cam_eb *)cdm->pos.cookie.bus; 1928 bus->refcount++; 1929 } else 1930 bus = NULL; 1931 xpt_unlock_buses(); 1932 1933 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 1934 1935 /* 1936 * If we get back 0, that means that we had to stop before fully 1937 * traversing the EDT. It also means that one of the subroutines 1938 * has set the status field to the proper value. If we get back 1, 1939 * we've fully traversed the EDT and copied out any matching entries. 1940 */ 1941 if (ret == 1) 1942 cdm->status = CAM_DEV_MATCH_LAST; 1943 1944 return(ret); 1945} 1946 1947static int 1948xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1949{ 1950 struct cam_periph *periph; 1951 struct ccb_dev_match *cdm; 1952 1953 cdm = (struct ccb_dev_match *)arg; 1954 1955 xpt_lock_buses(); 1956 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1957 && (cdm->pos.cookie.pdrv == pdrv) 1958 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1959 && (cdm->pos.cookie.periph != NULL)) { 1960 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1961 (*pdrv)->generation) { 1962 xpt_unlock_buses(); 1963 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1964 return(0); 1965 } 1966 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1967 periph->refcount++; 1968 } else 1969 periph = NULL; 1970 xpt_unlock_buses(); 1971 1972 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 1973} 1974 1975static int 1976xptplistperiphfunc(struct cam_periph *periph, void *arg) 1977{ 1978 struct ccb_dev_match *cdm; 1979 dev_match_ret retval; 1980 1981 cdm = (struct ccb_dev_match *)arg; 1982 1983 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1984 1985 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1986 cdm->status = CAM_DEV_MATCH_ERROR; 1987 return(0); 1988 } 1989 1990 /* 1991 * If the copy flag is set, copy this peripheral out. 1992 */ 1993 if (retval & DM_RET_COPY) { 1994 int spaceleft, j; 1995 size_t l; 1996 1997 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1998 sizeof(struct dev_match_result)); 1999 2000 /* 2001 * If we don't have enough space to put in another 2002 * match result, save our position and tell the 2003 * user there are more devices to check. 2004 */ 2005 if (spaceleft < sizeof(struct dev_match_result)) { 2006 struct periph_driver **pdrv; 2007 2008 pdrv = NULL; 2009 bzero(&cdm->pos, sizeof(cdm->pos)); 2010 cdm->pos.position_type = 2011 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2012 CAM_DEV_POS_PERIPH; 2013 2014 /* 2015 * This may look a bit non-sensical, but it is 2016 * actually quite logical. There are very few 2017 * peripheral drivers, and bloating every peripheral 2018 * structure with a pointer back to its parent 2019 * peripheral driver linker set entry would cost 2020 * more in the long run than doing this quick lookup. 2021 */ 2022 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2023 if (strcmp((*pdrv)->driver_name, 2024 periph->periph_name) == 0) 2025 break; 2026 } 2027 2028 if (*pdrv == NULL) { 2029 cdm->status = CAM_DEV_MATCH_ERROR; 2030 return(0); 2031 } 2032 2033 cdm->pos.cookie.pdrv = pdrv; 2034 /* 2035 * The periph generation slot does double duty, as 2036 * does the periph pointer slot. They are used for 2037 * both edt and pdrv lookups and positioning. 2038 */ 2039 cdm->pos.cookie.periph = periph; 2040 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2041 (*pdrv)->generation; 2042 cdm->status = CAM_DEV_MATCH_MORE; 2043 return(0); 2044 } 2045 2046 j = cdm->num_matches; 2047 cdm->num_matches++; 2048 cdm->matches[j].type = DEV_MATCH_PERIPH; 2049 cdm->matches[j].result.periph_result.path_id = 2050 periph->path->bus->path_id; 2051 2052 /* 2053 * The transport layer peripheral doesn't have a target or 2054 * lun. 2055 */ 2056 if (periph->path->target) 2057 cdm->matches[j].result.periph_result.target_id = 2058 periph->path->target->target_id; 2059 else 2060 cdm->matches[j].result.periph_result.target_id = 2061 CAM_TARGET_WILDCARD; 2062 2063 if (periph->path->device) 2064 cdm->matches[j].result.periph_result.target_lun = 2065 periph->path->device->lun_id; 2066 else 2067 cdm->matches[j].result.periph_result.target_lun = 2068 CAM_LUN_WILDCARD; 2069 2070 cdm->matches[j].result.periph_result.unit_number = 2071 periph->unit_number; 2072 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2073 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2074 periph->periph_name, l); 2075 } 2076 2077 return(1); 2078} 2079 2080static int 2081xptperiphlistmatch(struct ccb_dev_match *cdm) 2082{ 2083 int ret; 2084 2085 cdm->num_matches = 0; 2086 2087 /* 2088 * At this point in the edt traversal function, we check the bus 2089 * list generation to make sure that no busses have been added or 2090 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2091 * For the peripheral driver list traversal function, however, we 2092 * don't have to worry about new peripheral driver types coming or 2093 * going; they're in a linker set, and therefore can't change 2094 * without a recompile. 2095 */ 2096 2097 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2098 && (cdm->pos.cookie.pdrv != NULL)) 2099 ret = xptpdrvtraverse( 2100 (struct periph_driver **)cdm->pos.cookie.pdrv, 2101 xptplistpdrvfunc, cdm); 2102 else 2103 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2104 2105 /* 2106 * If we get back 0, that means that we had to stop before fully 2107 * traversing the peripheral driver tree. It also means that one of 2108 * the subroutines has set the status field to the proper value. If 2109 * we get back 1, we've fully traversed the EDT and copied out any 2110 * matching entries. 2111 */ 2112 if (ret == 1) 2113 cdm->status = CAM_DEV_MATCH_LAST; 2114 2115 return(ret); 2116} 2117 2118static int 2119xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2120{ 2121 struct cam_eb *bus, *next_bus; 2122 int retval; 2123 2124 retval = 1; 2125 if (start_bus) 2126 bus = start_bus; 2127 else { 2128 xpt_lock_buses(); 2129 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2130 if (bus == NULL) { 2131 xpt_unlock_buses(); 2132 return (retval); 2133 } 2134 bus->refcount++; 2135 xpt_unlock_buses(); 2136 } 2137 for (; bus != NULL; bus = next_bus) { 2138 retval = tr_func(bus, arg); 2139 if (retval == 0) { 2140 xpt_release_bus(bus); 2141 break; 2142 } 2143 xpt_lock_buses(); 2144 next_bus = TAILQ_NEXT(bus, links); 2145 if (next_bus) 2146 next_bus->refcount++; 2147 xpt_unlock_buses(); 2148 xpt_release_bus(bus); 2149 } 2150 return(retval); 2151} 2152 2153static int 2154xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2155 xpt_targetfunc_t *tr_func, void *arg) 2156{ 2157 struct cam_et *target, *next_target; 2158 int retval; 2159 2160 retval = 1; 2161 if (start_target) 2162 target = start_target; 2163 else { 2164 mtx_lock(&bus->eb_mtx); 2165 target = TAILQ_FIRST(&bus->et_entries); 2166 if (target == NULL) { 2167 mtx_unlock(&bus->eb_mtx); 2168 return (retval); 2169 } 2170 target->refcount++; 2171 mtx_unlock(&bus->eb_mtx); 2172 } 2173 for (; target != NULL; target = next_target) { 2174 retval = tr_func(target, arg); 2175 if (retval == 0) { 2176 xpt_release_target(target); 2177 break; 2178 } 2179 mtx_lock(&bus->eb_mtx); 2180 next_target = TAILQ_NEXT(target, links); 2181 if (next_target) 2182 next_target->refcount++; 2183 mtx_unlock(&bus->eb_mtx); 2184 xpt_release_target(target); 2185 } 2186 return(retval); 2187} 2188 2189static int 2190xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2191 xpt_devicefunc_t *tr_func, void *arg) 2192{ 2193 struct cam_eb *bus; 2194 struct cam_ed *device, *next_device; 2195 int retval; 2196 2197 retval = 1; 2198 bus = target->bus; 2199 if (start_device) 2200 device = start_device; 2201 else { 2202 mtx_lock(&bus->eb_mtx); 2203 device = TAILQ_FIRST(&target->ed_entries); 2204 if (device == NULL) { 2205 mtx_unlock(&bus->eb_mtx); 2206 return (retval); 2207 } 2208 device->refcount++; 2209 mtx_unlock(&bus->eb_mtx); 2210 } 2211 for (; device != NULL; device = next_device) { 2212 mtx_lock(&device->device_mtx); 2213 retval = tr_func(device, arg); 2214 mtx_unlock(&device->device_mtx); 2215 if (retval == 0) { 2216 xpt_release_device(device); 2217 break; 2218 } 2219 mtx_lock(&bus->eb_mtx); 2220 next_device = TAILQ_NEXT(device, links); 2221 if (next_device) 2222 next_device->refcount++; 2223 mtx_unlock(&bus->eb_mtx); 2224 xpt_release_device(device); 2225 } 2226 return(retval); 2227} 2228 2229static int 2230xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2231 xpt_periphfunc_t *tr_func, void *arg) 2232{ 2233 struct cam_eb *bus; 2234 struct cam_periph *periph, *next_periph; 2235 int retval; 2236 2237 retval = 1; 2238 2239 bus = device->target->bus; 2240 if (start_periph) 2241 periph = start_periph; 2242 else { 2243 xpt_lock_buses(); 2244 mtx_lock(&bus->eb_mtx); 2245 periph = SLIST_FIRST(&device->periphs); 2246 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2247 periph = SLIST_NEXT(periph, periph_links); 2248 if (periph == NULL) { 2249 mtx_unlock(&bus->eb_mtx); 2250 xpt_unlock_buses(); 2251 return (retval); 2252 } 2253 periph->refcount++; 2254 mtx_unlock(&bus->eb_mtx); 2255 xpt_unlock_buses(); 2256 } 2257 for (; periph != NULL; periph = next_periph) { 2258 retval = tr_func(periph, arg); 2259 if (retval == 0) { 2260 cam_periph_release_locked(periph); 2261 break; 2262 } 2263 xpt_lock_buses(); 2264 mtx_lock(&bus->eb_mtx); 2265 next_periph = SLIST_NEXT(periph, periph_links); 2266 while (next_periph != NULL && 2267 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2268 next_periph = SLIST_NEXT(next_periph, periph_links); 2269 if (next_periph) 2270 next_periph->refcount++; 2271 mtx_unlock(&bus->eb_mtx); 2272 xpt_unlock_buses(); 2273 cam_periph_release_locked(periph); 2274 } 2275 return(retval); 2276} 2277 2278static int 2279xptpdrvtraverse(struct periph_driver **start_pdrv, 2280 xpt_pdrvfunc_t *tr_func, void *arg) 2281{ 2282 struct periph_driver **pdrv; 2283 int retval; 2284 2285 retval = 1; 2286 2287 /* 2288 * We don't traverse the peripheral driver list like we do the 2289 * other lists, because it is a linker set, and therefore cannot be 2290 * changed during runtime. If the peripheral driver list is ever 2291 * re-done to be something other than a linker set (i.e. it can 2292 * change while the system is running), the list traversal should 2293 * be modified to work like the other traversal functions. 2294 */ 2295 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2296 *pdrv != NULL; pdrv++) { 2297 retval = tr_func(pdrv, arg); 2298 2299 if (retval == 0) 2300 return(retval); 2301 } 2302 2303 return(retval); 2304} 2305 2306static int 2307xptpdperiphtraverse(struct periph_driver **pdrv, 2308 struct cam_periph *start_periph, 2309 xpt_periphfunc_t *tr_func, void *arg) 2310{ 2311 struct cam_periph *periph, *next_periph; 2312 int retval; 2313 2314 retval = 1; 2315 2316 if (start_periph) 2317 periph = start_periph; 2318 else { 2319 xpt_lock_buses(); 2320 periph = TAILQ_FIRST(&(*pdrv)->units); 2321 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2322 periph = TAILQ_NEXT(periph, unit_links); 2323 if (periph == NULL) { 2324 xpt_unlock_buses(); 2325 return (retval); 2326 } 2327 periph->refcount++; 2328 xpt_unlock_buses(); 2329 } 2330 for (; periph != NULL; periph = next_periph) { 2331 cam_periph_lock(periph); 2332 retval = tr_func(periph, arg); 2333 cam_periph_unlock(periph); 2334 if (retval == 0) { 2335 cam_periph_release(periph); 2336 break; 2337 } 2338 xpt_lock_buses(); 2339 next_periph = TAILQ_NEXT(periph, unit_links); 2340 while (next_periph != NULL && 2341 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2342 next_periph = TAILQ_NEXT(next_periph, unit_links); 2343 if (next_periph) 2344 next_periph->refcount++; 2345 xpt_unlock_buses(); 2346 cam_periph_release(periph); 2347 } 2348 return(retval); 2349} 2350 2351static int 2352xptdefbusfunc(struct cam_eb *bus, void *arg) 2353{ 2354 struct xpt_traverse_config *tr_config; 2355 2356 tr_config = (struct xpt_traverse_config *)arg; 2357 2358 if (tr_config->depth == XPT_DEPTH_BUS) { 2359 xpt_busfunc_t *tr_func; 2360 2361 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2362 2363 return(tr_func(bus, tr_config->tr_arg)); 2364 } else 2365 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2366} 2367 2368static int 2369xptdeftargetfunc(struct cam_et *target, void *arg) 2370{ 2371 struct xpt_traverse_config *tr_config; 2372 2373 tr_config = (struct xpt_traverse_config *)arg; 2374 2375 if (tr_config->depth == XPT_DEPTH_TARGET) { 2376 xpt_targetfunc_t *tr_func; 2377 2378 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2379 2380 return(tr_func(target, tr_config->tr_arg)); 2381 } else 2382 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2383} 2384 2385static int 2386xptdefdevicefunc(struct cam_ed *device, void *arg) 2387{ 2388 struct xpt_traverse_config *tr_config; 2389 2390 tr_config = (struct xpt_traverse_config *)arg; 2391 2392 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2393 xpt_devicefunc_t *tr_func; 2394 2395 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2396 2397 return(tr_func(device, tr_config->tr_arg)); 2398 } else 2399 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2400} 2401 2402static int 2403xptdefperiphfunc(struct cam_periph *periph, void *arg) 2404{ 2405 struct xpt_traverse_config *tr_config; 2406 xpt_periphfunc_t *tr_func; 2407 2408 tr_config = (struct xpt_traverse_config *)arg; 2409 2410 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2411 2412 /* 2413 * Unlike the other default functions, we don't check for depth 2414 * here. The peripheral driver level is the last level in the EDT, 2415 * so if we're here, we should execute the function in question. 2416 */ 2417 return(tr_func(periph, tr_config->tr_arg)); 2418} 2419 2420/* 2421 * Execute the given function for every bus in the EDT. 2422 */ 2423static int 2424xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2425{ 2426 struct xpt_traverse_config tr_config; 2427 2428 tr_config.depth = XPT_DEPTH_BUS; 2429 tr_config.tr_func = tr_func; 2430 tr_config.tr_arg = arg; 2431 2432 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2433} 2434 2435/* 2436 * Execute the given function for every device in the EDT. 2437 */ 2438static int 2439xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2440{ 2441 struct xpt_traverse_config tr_config; 2442 2443 tr_config.depth = XPT_DEPTH_DEVICE; 2444 tr_config.tr_func = tr_func; 2445 tr_config.tr_arg = arg; 2446 2447 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2448} 2449 2450static int 2451xptsetasyncfunc(struct cam_ed *device, void *arg) 2452{ 2453 struct cam_path path; 2454 struct ccb_getdev cgd; 2455 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2456 2457 /* 2458 * Don't report unconfigured devices (Wildcard devs, 2459 * devices only for target mode, device instances 2460 * that have been invalidated but are waiting for 2461 * their last reference count to be released). 2462 */ 2463 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2464 return (1); 2465 2466 xpt_compile_path(&path, 2467 NULL, 2468 device->target->bus->path_id, 2469 device->target->target_id, 2470 device->lun_id); 2471 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2472 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2473 xpt_action((union ccb *)&cgd); 2474 csa->callback(csa->callback_arg, 2475 AC_FOUND_DEVICE, 2476 &path, &cgd); 2477 xpt_release_path(&path); 2478 2479 return(1); 2480} 2481 2482static int 2483xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2484{ 2485 struct cam_path path; 2486 struct ccb_pathinq cpi; 2487 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2488 2489 xpt_compile_path(&path, /*periph*/NULL, 2490 bus->path_id, 2491 CAM_TARGET_WILDCARD, 2492 CAM_LUN_WILDCARD); 2493 xpt_path_lock(&path); 2494 xpt_path_inq(&cpi, &path); 2495 csa->callback(csa->callback_arg, 2496 AC_PATH_REGISTERED, 2497 &path, &cpi); 2498 xpt_path_unlock(&path); 2499 xpt_release_path(&path); 2500 2501 return(1); 2502} 2503 2504void 2505xpt_action(union ccb *start_ccb) 2506{ 2507 2508 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, 2509 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code, 2510 xpt_action_name(start_ccb->ccb_h.func_code))); 2511 2512 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2513 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb); 2514} 2515 2516void 2517xpt_action_default(union ccb *start_ccb) 2518{ 2519 struct cam_path *path; 2520 struct cam_sim *sim; 2521 struct mtx *mtx; 2522 2523 path = start_ccb->ccb_h.path; 2524 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2525 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code, 2526 xpt_action_name(start_ccb->ccb_h.func_code))); 2527 2528 switch (start_ccb->ccb_h.func_code) { 2529 case XPT_SCSI_IO: 2530 { 2531 struct cam_ed *device; 2532 2533 /* 2534 * For the sake of compatibility with SCSI-1 2535 * devices that may not understand the identify 2536 * message, we include lun information in the 2537 * second byte of all commands. SCSI-1 specifies 2538 * that luns are a 3 bit value and reserves only 3 2539 * bits for lun information in the CDB. Later 2540 * revisions of the SCSI spec allow for more than 8 2541 * luns, but have deprecated lun information in the 2542 * CDB. So, if the lun won't fit, we must omit. 2543 * 2544 * Also be aware that during initial probing for devices, 2545 * the inquiry information is unknown but initialized to 0. 2546 * This means that this code will be exercised while probing 2547 * devices with an ANSI revision greater than 2. 2548 */ 2549 device = path->device; 2550 if (device->protocol_version <= SCSI_REV_2 2551 && start_ccb->ccb_h.target_lun < 8 2552 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2553 2554 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2555 start_ccb->ccb_h.target_lun << 5; 2556 } 2557 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2558 } 2559 /* FALLTHROUGH */ 2560 case XPT_TARGET_IO: 2561 case XPT_CONT_TARGET_IO: 2562 start_ccb->csio.sense_resid = 0; 2563 start_ccb->csio.resid = 0; 2564 /* FALLTHROUGH */ 2565 case XPT_ATA_IO: 2566 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2567 start_ccb->ataio.resid = 0; 2568 /* FALLTHROUGH */ 2569 case XPT_NVME_IO: 2570 /* FALLTHROUGH */ 2571 case XPT_NVME_ADMIN: 2572 /* FALLTHROUGH */ 2573 case XPT_RESET_DEV: 2574 case XPT_ENG_EXEC: 2575 case XPT_SMP_IO: 2576 { 2577 struct cam_devq *devq; 2578 2579 devq = path->bus->sim->devq; 2580 mtx_lock(&devq->send_mtx); 2581 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2582 if (xpt_schedule_devq(devq, path->device) != 0) 2583 xpt_run_devq(devq); 2584 mtx_unlock(&devq->send_mtx); 2585 break; 2586 } 2587 case XPT_CALC_GEOMETRY: 2588 /* Filter out garbage */ 2589 if (start_ccb->ccg.block_size == 0 2590 || start_ccb->ccg.volume_size == 0) { 2591 start_ccb->ccg.cylinders = 0; 2592 start_ccb->ccg.heads = 0; 2593 start_ccb->ccg.secs_per_track = 0; 2594 start_ccb->ccb_h.status = CAM_REQ_CMP; 2595 break; 2596 } 2597#if defined(PC98) || defined(__sparc64__) 2598 /* 2599 * In a PC-98 system, geometry translation depens on 2600 * the "real" device geometry obtained from mode page 4. 2601 * SCSI geometry translation is performed in the 2602 * initialization routine of the SCSI BIOS and the result 2603 * stored in host memory. If the translation is available 2604 * in host memory, use it. If not, rely on the default 2605 * translation the device driver performs. 2606 * For sparc64, we may need adjust the geometry of large 2607 * disks in order to fit the limitations of the 16-bit 2608 * fields of the VTOC8 disk label. 2609 */ 2610 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2611 start_ccb->ccb_h.status = CAM_REQ_CMP; 2612 break; 2613 } 2614#endif 2615 goto call_sim; 2616 case XPT_ABORT: 2617 { 2618 union ccb* abort_ccb; 2619 2620 abort_ccb = start_ccb->cab.abort_ccb; 2621 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2622 struct cam_ed *device; 2623 struct cam_devq *devq; 2624 2625 device = abort_ccb->ccb_h.path->device; 2626 devq = device->sim->devq; 2627 2628 mtx_lock(&devq->send_mtx); 2629 if (abort_ccb->ccb_h.pinfo.index > 0) { 2630 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb); 2631 abort_ccb->ccb_h.status = 2632 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2633 xpt_freeze_devq_device(device, 1); 2634 mtx_unlock(&devq->send_mtx); 2635 xpt_done(abort_ccb); 2636 start_ccb->ccb_h.status = CAM_REQ_CMP; 2637 break; 2638 } 2639 mtx_unlock(&devq->send_mtx); 2640 2641 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2642 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2643 /* 2644 * We've caught this ccb en route to 2645 * the SIM. Flag it for abort and the 2646 * SIM will do so just before starting 2647 * real work on the CCB. 2648 */ 2649 abort_ccb->ccb_h.status = 2650 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2651 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2652 start_ccb->ccb_h.status = CAM_REQ_CMP; 2653 break; 2654 } 2655 } 2656 if (XPT_FC_IS_QUEUED(abort_ccb) 2657 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2658 /* 2659 * It's already completed but waiting 2660 * for our SWI to get to it. 2661 */ 2662 start_ccb->ccb_h.status = CAM_UA_ABORT; 2663 break; 2664 } 2665 /* 2666 * If we weren't able to take care of the abort request 2667 * in the XPT, pass the request down to the SIM for processing. 2668 */ 2669 } 2670 /* FALLTHROUGH */ 2671 case XPT_ACCEPT_TARGET_IO: 2672 case XPT_EN_LUN: 2673 case XPT_IMMED_NOTIFY: 2674 case XPT_NOTIFY_ACK: 2675 case XPT_RESET_BUS: 2676 case XPT_IMMEDIATE_NOTIFY: 2677 case XPT_NOTIFY_ACKNOWLEDGE: 2678 case XPT_GET_SIM_KNOB_OLD: 2679 case XPT_GET_SIM_KNOB: 2680 case XPT_SET_SIM_KNOB: 2681 case XPT_GET_TRAN_SETTINGS: 2682 case XPT_SET_TRAN_SETTINGS: 2683 case XPT_PATH_INQ: 2684call_sim: 2685 sim = path->bus->sim; 2686 mtx = sim->mtx; 2687 if (mtx && !mtx_owned(mtx)) 2688 mtx_lock(mtx); 2689 else 2690 mtx = NULL; 2691 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2692 ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code)); 2693 (*(sim->sim_action))(sim, start_ccb); 2694 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2695 ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status)); 2696 if (mtx) 2697 mtx_unlock(mtx); 2698 break; 2699 case XPT_PATH_STATS: 2700 start_ccb->cpis.last_reset = path->bus->last_reset; 2701 start_ccb->ccb_h.status = CAM_REQ_CMP; 2702 break; 2703 case XPT_GDEV_TYPE: 2704 { 2705 struct cam_ed *dev; 2706 2707 dev = path->device; 2708 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2709 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2710 } else { 2711 struct ccb_getdev *cgd; 2712 2713 cgd = &start_ccb->cgd; 2714 cgd->protocol = dev->protocol; 2715 cgd->inq_data = dev->inq_data; 2716 cgd->ident_data = dev->ident_data; 2717 cgd->inq_flags = dev->inq_flags; 2718 cgd->ccb_h.status = CAM_REQ_CMP; 2719 cgd->serial_num_len = dev->serial_num_len; 2720 if ((dev->serial_num_len > 0) 2721 && (dev->serial_num != NULL)) 2722 bcopy(dev->serial_num, cgd->serial_num, 2723 dev->serial_num_len); 2724 } 2725 break; 2726 } 2727 case XPT_GDEV_STATS: 2728 { 2729 struct ccb_getdevstats *cgds = &start_ccb->cgds; 2730 struct cam_ed *dev = path->device; 2731 struct cam_eb *bus = path->bus; 2732 struct cam_et *tar = path->target; 2733 struct cam_devq *devq = bus->sim->devq; 2734 2735 mtx_lock(&devq->send_mtx); 2736 cgds->dev_openings = dev->ccbq.dev_openings; 2737 cgds->dev_active = dev->ccbq.dev_active; 2738 cgds->allocated = dev->ccbq.allocated; 2739 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2740 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued; 2741 cgds->last_reset = tar->last_reset; 2742 cgds->maxtags = dev->maxtags; 2743 cgds->mintags = dev->mintags; 2744 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2745 cgds->last_reset = bus->last_reset; 2746 mtx_unlock(&devq->send_mtx); 2747 cgds->ccb_h.status = CAM_REQ_CMP; 2748 break; 2749 } 2750 case XPT_GDEVLIST: 2751 { 2752 struct cam_periph *nperiph; 2753 struct periph_list *periph_head; 2754 struct ccb_getdevlist *cgdl; 2755 u_int i; 2756 struct cam_ed *device; 2757 int found; 2758 2759 2760 found = 0; 2761 2762 /* 2763 * Don't want anyone mucking with our data. 2764 */ 2765 device = path->device; 2766 periph_head = &device->periphs; 2767 cgdl = &start_ccb->cgdl; 2768 2769 /* 2770 * Check and see if the list has changed since the user 2771 * last requested a list member. If so, tell them that the 2772 * list has changed, and therefore they need to start over 2773 * from the beginning. 2774 */ 2775 if ((cgdl->index != 0) && 2776 (cgdl->generation != device->generation)) { 2777 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2778 break; 2779 } 2780 2781 /* 2782 * Traverse the list of peripherals and attempt to find 2783 * the requested peripheral. 2784 */ 2785 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2786 (nperiph != NULL) && (i <= cgdl->index); 2787 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2788 if (i == cgdl->index) { 2789 strlcpy(cgdl->periph_name, 2790 nperiph->periph_name, 2791 sizeof(cgdl->periph_name)); 2792 cgdl->unit_number = nperiph->unit_number; 2793 found = 1; 2794 } 2795 } 2796 if (found == 0) { 2797 cgdl->status = CAM_GDEVLIST_ERROR; 2798 break; 2799 } 2800 2801 if (nperiph == NULL) 2802 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2803 else 2804 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2805 2806 cgdl->index++; 2807 cgdl->generation = device->generation; 2808 2809 cgdl->ccb_h.status = CAM_REQ_CMP; 2810 break; 2811 } 2812 case XPT_DEV_MATCH: 2813 { 2814 dev_pos_type position_type; 2815 struct ccb_dev_match *cdm; 2816 2817 cdm = &start_ccb->cdm; 2818 2819 /* 2820 * There are two ways of getting at information in the EDT. 2821 * The first way is via the primary EDT tree. It starts 2822 * with a list of busses, then a list of targets on a bus, 2823 * then devices/luns on a target, and then peripherals on a 2824 * device/lun. The "other" way is by the peripheral driver 2825 * lists. The peripheral driver lists are organized by 2826 * peripheral driver. (obviously) So it makes sense to 2827 * use the peripheral driver list if the user is looking 2828 * for something like "da1", or all "da" devices. If the 2829 * user is looking for something on a particular bus/target 2830 * or lun, it's generally better to go through the EDT tree. 2831 */ 2832 2833 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2834 position_type = cdm->pos.position_type; 2835 else { 2836 u_int i; 2837 2838 position_type = CAM_DEV_POS_NONE; 2839 2840 for (i = 0; i < cdm->num_patterns; i++) { 2841 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2842 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2843 position_type = CAM_DEV_POS_EDT; 2844 break; 2845 } 2846 } 2847 2848 if (cdm->num_patterns == 0) 2849 position_type = CAM_DEV_POS_EDT; 2850 else if (position_type == CAM_DEV_POS_NONE) 2851 position_type = CAM_DEV_POS_PDRV; 2852 } 2853 2854 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2855 case CAM_DEV_POS_EDT: 2856 xptedtmatch(cdm); 2857 break; 2858 case CAM_DEV_POS_PDRV: 2859 xptperiphlistmatch(cdm); 2860 break; 2861 default: 2862 cdm->status = CAM_DEV_MATCH_ERROR; 2863 break; 2864 } 2865 2866 if (cdm->status == CAM_DEV_MATCH_ERROR) 2867 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2868 else 2869 start_ccb->ccb_h.status = CAM_REQ_CMP; 2870 2871 break; 2872 } 2873 case XPT_SASYNC_CB: 2874 { 2875 struct ccb_setasync *csa; 2876 struct async_node *cur_entry; 2877 struct async_list *async_head; 2878 u_int32_t added; 2879 2880 csa = &start_ccb->csa; 2881 added = csa->event_enable; 2882 async_head = &path->device->asyncs; 2883 2884 /* 2885 * If there is already an entry for us, simply 2886 * update it. 2887 */ 2888 cur_entry = SLIST_FIRST(async_head); 2889 while (cur_entry != NULL) { 2890 if ((cur_entry->callback_arg == csa->callback_arg) 2891 && (cur_entry->callback == csa->callback)) 2892 break; 2893 cur_entry = SLIST_NEXT(cur_entry, links); 2894 } 2895 2896 if (cur_entry != NULL) { 2897 /* 2898 * If the request has no flags set, 2899 * remove the entry. 2900 */ 2901 added &= ~cur_entry->event_enable; 2902 if (csa->event_enable == 0) { 2903 SLIST_REMOVE(async_head, cur_entry, 2904 async_node, links); 2905 xpt_release_device(path->device); 2906 free(cur_entry, M_CAMXPT); 2907 } else { 2908 cur_entry->event_enable = csa->event_enable; 2909 } 2910 csa->event_enable = added; 2911 } else { 2912 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2913 M_NOWAIT); 2914 if (cur_entry == NULL) { 2915 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2916 break; 2917 } 2918 cur_entry->event_enable = csa->event_enable; 2919 cur_entry->event_lock = (path->bus->sim->mtx && 2920 mtx_owned(path->bus->sim->mtx)) ? 1 : 0; 2921 cur_entry->callback_arg = csa->callback_arg; 2922 cur_entry->callback = csa->callback; 2923 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2924 xpt_acquire_device(path->device); 2925 } 2926 start_ccb->ccb_h.status = CAM_REQ_CMP; 2927 break; 2928 } 2929 case XPT_REL_SIMQ: 2930 { 2931 struct ccb_relsim *crs; 2932 struct cam_ed *dev; 2933 2934 crs = &start_ccb->crs; 2935 dev = path->device; 2936 if (dev == NULL) { 2937 2938 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2939 break; 2940 } 2941 2942 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2943 2944 /* Don't ever go below one opening */ 2945 if (crs->openings > 0) { 2946 xpt_dev_ccbq_resize(path, crs->openings); 2947 if (bootverbose) { 2948 xpt_print(path, 2949 "number of openings is now %d\n", 2950 crs->openings); 2951 } 2952 } 2953 } 2954 2955 mtx_lock(&dev->sim->devq->send_mtx); 2956 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2957 2958 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2959 2960 /* 2961 * Just extend the old timeout and decrement 2962 * the freeze count so that a single timeout 2963 * is sufficient for releasing the queue. 2964 */ 2965 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2966 callout_stop(&dev->callout); 2967 } else { 2968 2969 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2970 } 2971 2972 callout_reset_sbt(&dev->callout, 2973 SBT_1MS * crs->release_timeout, 0, 2974 xpt_release_devq_timeout, dev, 0); 2975 2976 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2977 2978 } 2979 2980 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2981 2982 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2983 /* 2984 * Decrement the freeze count so that a single 2985 * completion is still sufficient to unfreeze 2986 * the queue. 2987 */ 2988 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2989 } else { 2990 2991 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2992 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2993 } 2994 } 2995 2996 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2997 2998 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2999 || (dev->ccbq.dev_active == 0)) { 3000 3001 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3002 } else { 3003 3004 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3005 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3006 } 3007 } 3008 mtx_unlock(&dev->sim->devq->send_mtx); 3009 3010 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 3011 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 3012 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 3013 start_ccb->ccb_h.status = CAM_REQ_CMP; 3014 break; 3015 } 3016 case XPT_DEBUG: { 3017 struct cam_path *oldpath; 3018 3019 /* Check that all request bits are supported. */ 3020 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 3021 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3022 break; 3023 } 3024 3025 cam_dflags = CAM_DEBUG_NONE; 3026 if (cam_dpath != NULL) { 3027 oldpath = cam_dpath; 3028 cam_dpath = NULL; 3029 xpt_free_path(oldpath); 3030 } 3031 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 3032 if (xpt_create_path(&cam_dpath, NULL, 3033 start_ccb->ccb_h.path_id, 3034 start_ccb->ccb_h.target_id, 3035 start_ccb->ccb_h.target_lun) != 3036 CAM_REQ_CMP) { 3037 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3038 } else { 3039 cam_dflags = start_ccb->cdbg.flags; 3040 start_ccb->ccb_h.status = CAM_REQ_CMP; 3041 xpt_print(cam_dpath, "debugging flags now %x\n", 3042 cam_dflags); 3043 } 3044 } else 3045 start_ccb->ccb_h.status = CAM_REQ_CMP; 3046 break; 3047 } 3048 case XPT_NOOP: 3049 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3050 xpt_freeze_devq(path, 1); 3051 start_ccb->ccb_h.status = CAM_REQ_CMP; 3052 break; 3053 case XPT_REPROBE_LUN: 3054 xpt_async(AC_INQ_CHANGED, path, NULL); 3055 start_ccb->ccb_h.status = CAM_REQ_CMP; 3056 xpt_done(start_ccb); 3057 break; 3058 default: 3059 case XPT_SDEV_TYPE: 3060 case XPT_TERM_IO: 3061 case XPT_ENG_INQ: 3062 /* XXX Implement */ 3063 xpt_print_path(start_ccb->ccb_h.path); 3064 printf("%s: CCB type %#x %s not supported\n", __func__, 3065 start_ccb->ccb_h.func_code, 3066 xpt_action_name(start_ccb->ccb_h.func_code)); 3067 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3068 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3069 xpt_done(start_ccb); 3070 } 3071 break; 3072 } 3073 CAM_DEBUG(path, CAM_DEBUG_TRACE, 3074 ("xpt_action_default: func= %#x %s status %#x\n", 3075 start_ccb->ccb_h.func_code, 3076 xpt_action_name(start_ccb->ccb_h.func_code), 3077 start_ccb->ccb_h.status)); 3078} 3079 3080void 3081xpt_polled_action(union ccb *start_ccb) 3082{ 3083 u_int32_t timeout; 3084 struct cam_sim *sim; 3085 struct cam_devq *devq; 3086 struct cam_ed *dev; 3087 struct mtx *mtx; 3088 3089 timeout = start_ccb->ccb_h.timeout * 10; 3090 sim = start_ccb->ccb_h.path->bus->sim; 3091 devq = sim->devq; 3092 mtx = sim->mtx; 3093 dev = start_ccb->ccb_h.path->device; 3094 3095 mtx_unlock(&dev->device_mtx); 3096 3097 /* 3098 * Steal an opening so that no other queued requests 3099 * can get it before us while we simulate interrupts. 3100 */ 3101 mtx_lock(&devq->send_mtx); 3102 dev->ccbq.dev_openings--; 3103 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3104 (--timeout > 0)) { 3105 mtx_unlock(&devq->send_mtx); 3106 DELAY(100); 3107 if (mtx) 3108 mtx_lock(mtx); 3109 (*(sim->sim_poll))(sim); 3110 if (mtx) 3111 mtx_unlock(mtx); 3112 camisr_runqueue(); 3113 mtx_lock(&devq->send_mtx); 3114 } 3115 dev->ccbq.dev_openings++; 3116 mtx_unlock(&devq->send_mtx); 3117 3118 if (timeout != 0) { 3119 xpt_action(start_ccb); 3120 while(--timeout > 0) { 3121 if (mtx) 3122 mtx_lock(mtx); 3123 (*(sim->sim_poll))(sim); 3124 if (mtx) 3125 mtx_unlock(mtx); 3126 camisr_runqueue(); 3127 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3128 != CAM_REQ_INPROG) 3129 break; 3130 DELAY(100); 3131 } 3132 if (timeout == 0) { 3133 /* 3134 * XXX Is it worth adding a sim_timeout entry 3135 * point so we can attempt recovery? If 3136 * this is only used for dumps, I don't think 3137 * it is. 3138 */ 3139 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3140 } 3141 } else { 3142 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3143 } 3144 3145 mtx_lock(&dev->device_mtx); 3146} 3147 3148/* 3149 * Schedule a peripheral driver to receive a ccb when its 3150 * target device has space for more transactions. 3151 */ 3152void 3153xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3154{ 3155 3156 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3157 cam_periph_assert(periph, MA_OWNED); 3158 if (new_priority < periph->scheduled_priority) { 3159 periph->scheduled_priority = new_priority; 3160 xpt_run_allocq(periph, 0); 3161 } 3162} 3163 3164 3165/* 3166 * Schedule a device to run on a given queue. 3167 * If the device was inserted as a new entry on the queue, 3168 * return 1 meaning the device queue should be run. If we 3169 * were already queued, implying someone else has already 3170 * started the queue, return 0 so the caller doesn't attempt 3171 * to run the queue. 3172 */ 3173static int 3174xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3175 u_int32_t new_priority) 3176{ 3177 int retval; 3178 u_int32_t old_priority; 3179 3180 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3181 3182 old_priority = pinfo->priority; 3183 3184 /* 3185 * Are we already queued? 3186 */ 3187 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3188 /* Simply reorder based on new priority */ 3189 if (new_priority < old_priority) { 3190 camq_change_priority(queue, pinfo->index, 3191 new_priority); 3192 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3193 ("changed priority to %d\n", 3194 new_priority)); 3195 retval = 1; 3196 } else 3197 retval = 0; 3198 } else { 3199 /* New entry on the queue */ 3200 if (new_priority < old_priority) 3201 pinfo->priority = new_priority; 3202 3203 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3204 ("Inserting onto queue\n")); 3205 pinfo->generation = ++queue->generation; 3206 camq_insert(queue, pinfo); 3207 retval = 1; 3208 } 3209 return (retval); 3210} 3211 3212static void 3213xpt_run_allocq_task(void *context, int pending) 3214{ 3215 struct cam_periph *periph = context; 3216 3217 cam_periph_lock(periph); 3218 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3219 xpt_run_allocq(periph, 1); 3220 cam_periph_unlock(periph); 3221 cam_periph_release(periph); 3222} 3223 3224static void 3225xpt_run_allocq(struct cam_periph *periph, int sleep) 3226{ 3227 struct cam_ed *device; 3228 union ccb *ccb; 3229 uint32_t prio; 3230 3231 cam_periph_assert(periph, MA_OWNED); 3232 if (periph->periph_allocating) 3233 return; 3234 periph->periph_allocating = 1; 3235 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3236 device = periph->path->device; 3237 ccb = NULL; 3238restart: 3239 while ((prio = min(periph->scheduled_priority, 3240 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3241 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3242 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3243 3244 if (ccb == NULL && 3245 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3246 if (sleep) { 3247 ccb = xpt_get_ccb(periph); 3248 goto restart; 3249 } 3250 if (periph->flags & CAM_PERIPH_RUN_TASK) 3251 break; 3252 cam_periph_doacquire(periph); 3253 periph->flags |= CAM_PERIPH_RUN_TASK; 3254 taskqueue_enqueue(xsoftc.xpt_taskq, 3255 &periph->periph_run_task); 3256 break; 3257 } 3258 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3259 if (prio == periph->immediate_priority) { 3260 periph->immediate_priority = CAM_PRIORITY_NONE; 3261 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3262 ("waking cam_periph_getccb()\n")); 3263 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3264 periph_links.sle); 3265 wakeup(&periph->ccb_list); 3266 } else { 3267 periph->scheduled_priority = CAM_PRIORITY_NONE; 3268 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3269 ("calling periph_start()\n")); 3270 periph->periph_start(periph, ccb); 3271 } 3272 ccb = NULL; 3273 } 3274 if (ccb != NULL) 3275 xpt_release_ccb(ccb); 3276 periph->periph_allocating = 0; 3277} 3278 3279static void 3280xpt_run_devq(struct cam_devq *devq) 3281{ 3282 struct mtx *mtx; 3283 3284 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3285 3286 devq->send_queue.qfrozen_cnt++; 3287 while ((devq->send_queue.entries > 0) 3288 && (devq->send_openings > 0) 3289 && (devq->send_queue.qfrozen_cnt <= 1)) { 3290 struct cam_ed *device; 3291 union ccb *work_ccb; 3292 struct cam_sim *sim; 3293 struct xpt_proto *proto; 3294 3295 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3296 CAMQ_HEAD); 3297 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3298 ("running device %p\n", device)); 3299 3300 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3301 if (work_ccb == NULL) { 3302 printf("device on run queue with no ccbs???\n"); 3303 continue; 3304 } 3305 3306 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3307 3308 mtx_lock(&xsoftc.xpt_highpower_lock); 3309 if (xsoftc.num_highpower <= 0) { 3310 /* 3311 * We got a high power command, but we 3312 * don't have any available slots. Freeze 3313 * the device queue until we have a slot 3314 * available. 3315 */ 3316 xpt_freeze_devq_device(device, 1); 3317 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3318 highpowerq_entry); 3319 3320 mtx_unlock(&xsoftc.xpt_highpower_lock); 3321 continue; 3322 } else { 3323 /* 3324 * Consume a high power slot while 3325 * this ccb runs. 3326 */ 3327 xsoftc.num_highpower--; 3328 } 3329 mtx_unlock(&xsoftc.xpt_highpower_lock); 3330 } 3331 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3332 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3333 devq->send_openings--; 3334 devq->send_active++; 3335 xpt_schedule_devq(devq, device); 3336 mtx_unlock(&devq->send_mtx); 3337 3338 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3339 /* 3340 * The client wants to freeze the queue 3341 * after this CCB is sent. 3342 */ 3343 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3344 } 3345 3346 /* In Target mode, the peripheral driver knows best... */ 3347 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3348 if ((device->inq_flags & SID_CmdQue) != 0 3349 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3350 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3351 else 3352 /* 3353 * Clear this in case of a retried CCB that 3354 * failed due to a rejected tag. 3355 */ 3356 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3357 } 3358 3359 KASSERT(device == work_ccb->ccb_h.path->device, 3360 ("device (%p) / path->device (%p) mismatch", 3361 device, work_ccb->ccb_h.path->device)); 3362 proto = xpt_proto_find(device->protocol); 3363 if (proto && proto->ops->debug_out) 3364 proto->ops->debug_out(work_ccb); 3365 3366 /* 3367 * Device queues can be shared among multiple SIM instances 3368 * that reside on different busses. Use the SIM from the 3369 * queued device, rather than the one from the calling bus. 3370 */ 3371 sim = device->sim; 3372 mtx = sim->mtx; 3373 if (mtx && !mtx_owned(mtx)) 3374 mtx_lock(mtx); 3375 else 3376 mtx = NULL; 3377 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms 3378 (*(sim->sim_action))(sim, work_ccb); 3379 if (mtx) 3380 mtx_unlock(mtx); 3381 mtx_lock(&devq->send_mtx); 3382 } 3383 devq->send_queue.qfrozen_cnt--; 3384} 3385 3386/* 3387 * This function merges stuff from the slave ccb into the master ccb, while 3388 * keeping important fields in the master ccb constant. 3389 */ 3390void 3391xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3392{ 3393 3394 /* 3395 * Pull fields that are valid for peripheral drivers to set 3396 * into the master CCB along with the CCB "payload". 3397 */ 3398 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3399 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3400 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3401 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3402 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3403 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3404} 3405 3406void 3407xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path, 3408 u_int32_t priority, u_int32_t flags) 3409{ 3410 3411 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3412 ccb_h->pinfo.priority = priority; 3413 ccb_h->path = path; 3414 ccb_h->path_id = path->bus->path_id; 3415 if (path->target) 3416 ccb_h->target_id = path->target->target_id; 3417 else 3418 ccb_h->target_id = CAM_TARGET_WILDCARD; 3419 if (path->device) { 3420 ccb_h->target_lun = path->device->lun_id; 3421 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3422 } else { 3423 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3424 } 3425 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3426 ccb_h->flags = flags; 3427 ccb_h->xflags = 0; 3428} 3429 3430void 3431xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3432{ 3433 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0); 3434} 3435 3436/* Path manipulation functions */ 3437cam_status 3438xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3439 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3440{ 3441 struct cam_path *path; 3442 cam_status status; 3443 3444 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3445 3446 if (path == NULL) { 3447 status = CAM_RESRC_UNAVAIL; 3448 return(status); 3449 } 3450 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3451 if (status != CAM_REQ_CMP) { 3452 free(path, M_CAMPATH); 3453 path = NULL; 3454 } 3455 *new_path_ptr = path; 3456 return (status); 3457} 3458 3459cam_status 3460xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3461 struct cam_periph *periph, path_id_t path_id, 3462 target_id_t target_id, lun_id_t lun_id) 3463{ 3464 3465 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3466 lun_id)); 3467} 3468 3469cam_status 3470xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3471 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3472{ 3473 struct cam_eb *bus; 3474 struct cam_et *target; 3475 struct cam_ed *device; 3476 cam_status status; 3477 3478 status = CAM_REQ_CMP; /* Completed without error */ 3479 target = NULL; /* Wildcarded */ 3480 device = NULL; /* Wildcarded */ 3481 3482 /* 3483 * We will potentially modify the EDT, so block interrupts 3484 * that may attempt to create cam paths. 3485 */ 3486 bus = xpt_find_bus(path_id); 3487 if (bus == NULL) { 3488 status = CAM_PATH_INVALID; 3489 } else { 3490 xpt_lock_buses(); 3491 mtx_lock(&bus->eb_mtx); 3492 target = xpt_find_target(bus, target_id); 3493 if (target == NULL) { 3494 /* Create one */ 3495 struct cam_et *new_target; 3496 3497 new_target = xpt_alloc_target(bus, target_id); 3498 if (new_target == NULL) { 3499 status = CAM_RESRC_UNAVAIL; 3500 } else { 3501 target = new_target; 3502 } 3503 } 3504 xpt_unlock_buses(); 3505 if (target != NULL) { 3506 device = xpt_find_device(target, lun_id); 3507 if (device == NULL) { 3508 /* Create one */ 3509 struct cam_ed *new_device; 3510 3511 new_device = 3512 (*(bus->xport->ops->alloc_device))(bus, 3513 target, 3514 lun_id); 3515 if (new_device == NULL) { 3516 status = CAM_RESRC_UNAVAIL; 3517 } else { 3518 device = new_device; 3519 } 3520 } 3521 } 3522 mtx_unlock(&bus->eb_mtx); 3523 } 3524 3525 /* 3526 * Only touch the user's data if we are successful. 3527 */ 3528 if (status == CAM_REQ_CMP) { 3529 new_path->periph = perph; 3530 new_path->bus = bus; 3531 new_path->target = target; 3532 new_path->device = device; 3533 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3534 } else { 3535 if (device != NULL) 3536 xpt_release_device(device); 3537 if (target != NULL) 3538 xpt_release_target(target); 3539 if (bus != NULL) 3540 xpt_release_bus(bus); 3541 } 3542 return (status); 3543} 3544 3545cam_status 3546xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3547{ 3548 struct cam_path *new_path; 3549 3550 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3551 if (new_path == NULL) 3552 return(CAM_RESRC_UNAVAIL); 3553 xpt_copy_path(new_path, path); 3554 *new_path_ptr = new_path; 3555 return (CAM_REQ_CMP); 3556} 3557 3558void 3559xpt_copy_path(struct cam_path *new_path, struct cam_path *path) 3560{ 3561 3562 *new_path = *path; 3563 if (path->bus != NULL) 3564 xpt_acquire_bus(path->bus); 3565 if (path->target != NULL) 3566 xpt_acquire_target(path->target); 3567 if (path->device != NULL) 3568 xpt_acquire_device(path->device); 3569} 3570 3571void 3572xpt_release_path(struct cam_path *path) 3573{ 3574 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3575 if (path->device != NULL) { 3576 xpt_release_device(path->device); 3577 path->device = NULL; 3578 } 3579 if (path->target != NULL) { 3580 xpt_release_target(path->target); 3581 path->target = NULL; 3582 } 3583 if (path->bus != NULL) { 3584 xpt_release_bus(path->bus); 3585 path->bus = NULL; 3586 } 3587} 3588 3589void 3590xpt_free_path(struct cam_path *path) 3591{ 3592 3593 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3594 xpt_release_path(path); 3595 free(path, M_CAMPATH); 3596} 3597 3598void 3599xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3600 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3601{ 3602 3603 xpt_lock_buses(); 3604 if (bus_ref) { 3605 if (path->bus) 3606 *bus_ref = path->bus->refcount; 3607 else 3608 *bus_ref = 0; 3609 } 3610 if (periph_ref) { 3611 if (path->periph) 3612 *periph_ref = path->periph->refcount; 3613 else 3614 *periph_ref = 0; 3615 } 3616 xpt_unlock_buses(); 3617 if (target_ref) { 3618 if (path->target) 3619 *target_ref = path->target->refcount; 3620 else 3621 *target_ref = 0; 3622 } 3623 if (device_ref) { 3624 if (path->device) 3625 *device_ref = path->device->refcount; 3626 else 3627 *device_ref = 0; 3628 } 3629} 3630 3631/* 3632 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3633 * in path1, 2 for match with wildcards in path2. 3634 */ 3635int 3636xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3637{ 3638 int retval = 0; 3639 3640 if (path1->bus != path2->bus) { 3641 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3642 retval = 1; 3643 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3644 retval = 2; 3645 else 3646 return (-1); 3647 } 3648 if (path1->target != path2->target) { 3649 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3650 if (retval == 0) 3651 retval = 1; 3652 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3653 retval = 2; 3654 else 3655 return (-1); 3656 } 3657 if (path1->device != path2->device) { 3658 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3659 if (retval == 0) 3660 retval = 1; 3661 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3662 retval = 2; 3663 else 3664 return (-1); 3665 } 3666 return (retval); 3667} 3668 3669int 3670xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3671{ 3672 int retval = 0; 3673 3674 if (path->bus != dev->target->bus) { 3675 if (path->bus->path_id == CAM_BUS_WILDCARD) 3676 retval = 1; 3677 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3678 retval = 2; 3679 else 3680 return (-1); 3681 } 3682 if (path->target != dev->target) { 3683 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3684 if (retval == 0) 3685 retval = 1; 3686 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3687 retval = 2; 3688 else 3689 return (-1); 3690 } 3691 if (path->device != dev) { 3692 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3693 if (retval == 0) 3694 retval = 1; 3695 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3696 retval = 2; 3697 else 3698 return (-1); 3699 } 3700 return (retval); 3701} 3702 3703void 3704xpt_print_path(struct cam_path *path) 3705{ 3706 3707 if (path == NULL) 3708 printf("(nopath): "); 3709 else { 3710 if (path->periph != NULL) 3711 printf("(%s%d:", path->periph->periph_name, 3712 path->periph->unit_number); 3713 else 3714 printf("(noperiph:"); 3715 3716 if (path->bus != NULL) 3717 printf("%s%d:%d:", path->bus->sim->sim_name, 3718 path->bus->sim->unit_number, 3719 path->bus->sim->bus_id); 3720 else 3721 printf("nobus:"); 3722 3723 if (path->target != NULL) 3724 printf("%d:", path->target->target_id); 3725 else 3726 printf("X:"); 3727 3728 if (path->device != NULL) 3729 printf("%jx): ", (uintmax_t)path->device->lun_id); 3730 else 3731 printf("X): "); 3732 } 3733} 3734 3735void 3736xpt_print_device(struct cam_ed *device) 3737{ 3738 3739 if (device == NULL) 3740 printf("(nopath): "); 3741 else { 3742 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3743 device->sim->unit_number, 3744 device->sim->bus_id, 3745 device->target->target_id, 3746 (uintmax_t)device->lun_id); 3747 } 3748} 3749 3750void 3751xpt_print(struct cam_path *path, const char *fmt, ...) 3752{ 3753 va_list ap; 3754 xpt_print_path(path); 3755 va_start(ap, fmt); 3756 vprintf(fmt, ap); 3757 va_end(ap); 3758} 3759 3760int 3761xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3762{ 3763 struct sbuf sb; 3764 3765 sbuf_new(&sb, str, str_len, 0); 3766 3767 if (path == NULL) 3768 sbuf_printf(&sb, "(nopath): "); 3769 else { 3770 if (path->periph != NULL) 3771 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3772 path->periph->unit_number); 3773 else 3774 sbuf_printf(&sb, "(noperiph:"); 3775 3776 if (path->bus != NULL) 3777 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3778 path->bus->sim->unit_number, 3779 path->bus->sim->bus_id); 3780 else 3781 sbuf_printf(&sb, "nobus:"); 3782 3783 if (path->target != NULL) 3784 sbuf_printf(&sb, "%d:", path->target->target_id); 3785 else 3786 sbuf_printf(&sb, "X:"); 3787 3788 if (path->device != NULL) 3789 sbuf_printf(&sb, "%jx): ", 3790 (uintmax_t)path->device->lun_id); 3791 else 3792 sbuf_printf(&sb, "X): "); 3793 } 3794 sbuf_finish(&sb); 3795 3796 return(sbuf_len(&sb)); 3797} 3798 3799path_id_t 3800xpt_path_path_id(struct cam_path *path) 3801{ 3802 return(path->bus->path_id); 3803} 3804 3805target_id_t 3806xpt_path_target_id(struct cam_path *path) 3807{ 3808 if (path->target != NULL) 3809 return (path->target->target_id); 3810 else 3811 return (CAM_TARGET_WILDCARD); 3812} 3813 3814lun_id_t 3815xpt_path_lun_id(struct cam_path *path) 3816{ 3817 if (path->device != NULL) 3818 return (path->device->lun_id); 3819 else 3820 return (CAM_LUN_WILDCARD); 3821} 3822 3823struct cam_sim * 3824xpt_path_sim(struct cam_path *path) 3825{ 3826 3827 return (path->bus->sim); 3828} 3829 3830struct cam_periph* 3831xpt_path_periph(struct cam_path *path) 3832{ 3833 3834 return (path->periph); 3835} 3836 3837/* 3838 * Release a CAM control block for the caller. Remit the cost of the structure 3839 * to the device referenced by the path. If the this device had no 'credits' 3840 * and peripheral drivers have registered async callbacks for this notification 3841 * call them now. 3842 */ 3843void 3844xpt_release_ccb(union ccb *free_ccb) 3845{ 3846 struct cam_ed *device; 3847 struct cam_periph *periph; 3848 3849 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3850 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3851 device = free_ccb->ccb_h.path->device; 3852 periph = free_ccb->ccb_h.path->periph; 3853 3854 xpt_free_ccb(free_ccb); 3855 periph->periph_allocated--; 3856 cam_ccbq_release_opening(&device->ccbq); 3857 xpt_run_allocq(periph, 0); 3858} 3859 3860/* Functions accessed by SIM drivers */ 3861 3862static struct xpt_xport_ops xport_default_ops = { 3863 .alloc_device = xpt_alloc_device_default, 3864 .action = xpt_action_default, 3865 .async = xpt_dev_async_default, 3866}; 3867static struct xpt_xport xport_default = { 3868 .xport = XPORT_UNKNOWN, 3869 .name = "unknown", 3870 .ops = &xport_default_ops, 3871}; 3872 3873CAM_XPT_XPORT(xport_default); 3874 3875/* 3876 * A sim structure, listing the SIM entry points and instance 3877 * identification info is passed to xpt_bus_register to hook the SIM 3878 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3879 * for this new bus and places it in the array of busses and assigns 3880 * it a path_id. The path_id may be influenced by "hard wiring" 3881 * information specified by the user. Once interrupt services are 3882 * available, the bus will be probed. 3883 */ 3884int32_t 3885xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3886{ 3887 struct cam_eb *new_bus; 3888 struct cam_eb *old_bus; 3889 struct ccb_pathinq cpi; 3890 struct cam_path *path; 3891 cam_status status; 3892 3893 sim->bus_id = bus; 3894 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3895 M_CAMXPT, M_NOWAIT|M_ZERO); 3896 if (new_bus == NULL) { 3897 /* Couldn't satisfy request */ 3898 return (CAM_RESRC_UNAVAIL); 3899 } 3900 3901 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 3902 TAILQ_INIT(&new_bus->et_entries); 3903 cam_sim_hold(sim); 3904 new_bus->sim = sim; 3905 timevalclear(&new_bus->last_reset); 3906 new_bus->flags = 0; 3907 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3908 new_bus->generation = 0; 3909 3910 xpt_lock_buses(); 3911 sim->path_id = new_bus->path_id = 3912 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3913 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3914 while (old_bus != NULL 3915 && old_bus->path_id < new_bus->path_id) 3916 old_bus = TAILQ_NEXT(old_bus, links); 3917 if (old_bus != NULL) 3918 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3919 else 3920 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3921 xsoftc.bus_generation++; 3922 xpt_unlock_buses(); 3923 3924 /* 3925 * Set a default transport so that a PATH_INQ can be issued to 3926 * the SIM. This will then allow for probing and attaching of 3927 * a more appropriate transport. 3928 */ 3929 new_bus->xport = &xport_default; 3930 3931 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 3932 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3933 if (status != CAM_REQ_CMP) { 3934 xpt_release_bus(new_bus); 3935 return (CAM_RESRC_UNAVAIL); 3936 } 3937 3938 xpt_path_inq(&cpi, path); 3939 3940 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3941 struct xpt_xport **xpt; 3942 3943 SET_FOREACH(xpt, cam_xpt_xport_set) { 3944 if ((*xpt)->xport == cpi.transport) { 3945 new_bus->xport = *xpt; 3946 break; 3947 } 3948 } 3949 if (new_bus->xport == NULL) { 3950 xpt_print_path(path); 3951 printf("No transport found for %d\n", cpi.transport); 3952 xpt_release_bus(new_bus); 3953 free(path, M_CAMXPT); 3954 return (CAM_RESRC_UNAVAIL); 3955 } 3956 } 3957 3958 /* Notify interested parties */ 3959 if (sim->path_id != CAM_XPT_PATH_ID) { 3960 3961 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3962 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 3963 union ccb *scan_ccb; 3964 3965 /* Initiate bus rescan. */ 3966 scan_ccb = xpt_alloc_ccb_nowait(); 3967 if (scan_ccb != NULL) { 3968 scan_ccb->ccb_h.path = path; 3969 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3970 scan_ccb->crcn.flags = 0; 3971 xpt_rescan(scan_ccb); 3972 } else { 3973 xpt_print(path, 3974 "Can't allocate CCB to scan bus\n"); 3975 xpt_free_path(path); 3976 } 3977 } else 3978 xpt_free_path(path); 3979 } else 3980 xpt_free_path(path); 3981 return (CAM_SUCCESS); 3982} 3983 3984int32_t 3985xpt_bus_deregister(path_id_t pathid) 3986{ 3987 struct cam_path bus_path; 3988 cam_status status; 3989 3990 status = xpt_compile_path(&bus_path, NULL, pathid, 3991 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3992 if (status != CAM_REQ_CMP) 3993 return (status); 3994 3995 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3996 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3997 3998 /* Release the reference count held while registered. */ 3999 xpt_release_bus(bus_path.bus); 4000 xpt_release_path(&bus_path); 4001 4002 return (CAM_REQ_CMP); 4003} 4004 4005static path_id_t 4006xptnextfreepathid(void) 4007{ 4008 struct cam_eb *bus; 4009 path_id_t pathid; 4010 const char *strval; 4011 4012 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4013 pathid = 0; 4014 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4015retry: 4016 /* Find an unoccupied pathid */ 4017 while (bus != NULL && bus->path_id <= pathid) { 4018 if (bus->path_id == pathid) 4019 pathid++; 4020 bus = TAILQ_NEXT(bus, links); 4021 } 4022 4023 /* 4024 * Ensure that this pathid is not reserved for 4025 * a bus that may be registered in the future. 4026 */ 4027 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4028 ++pathid; 4029 /* Start the search over */ 4030 goto retry; 4031 } 4032 return (pathid); 4033} 4034 4035static path_id_t 4036xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4037{ 4038 path_id_t pathid; 4039 int i, dunit, val; 4040 char buf[32]; 4041 const char *dname; 4042 4043 pathid = CAM_XPT_PATH_ID; 4044 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4045 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 4046 return (pathid); 4047 i = 0; 4048 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4049 if (strcmp(dname, "scbus")) { 4050 /* Avoid a bit of foot shooting. */ 4051 continue; 4052 } 4053 if (dunit < 0) /* unwired?! */ 4054 continue; 4055 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4056 if (sim_bus == val) { 4057 pathid = dunit; 4058 break; 4059 } 4060 } else if (sim_bus == 0) { 4061 /* Unspecified matches bus 0 */ 4062 pathid = dunit; 4063 break; 4064 } else { 4065 printf("Ambiguous scbus configuration for %s%d " 4066 "bus %d, cannot wire down. The kernel " 4067 "config entry for scbus%d should " 4068 "specify a controller bus.\n" 4069 "Scbus will be assigned dynamically.\n", 4070 sim_name, sim_unit, sim_bus, dunit); 4071 break; 4072 } 4073 } 4074 4075 if (pathid == CAM_XPT_PATH_ID) 4076 pathid = xptnextfreepathid(); 4077 return (pathid); 4078} 4079 4080static const char * 4081xpt_async_string(u_int32_t async_code) 4082{ 4083 4084 switch (async_code) { 4085 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4086 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4087 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4088 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4089 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4090 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4091 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4092 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4093 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4094 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4095 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4096 case AC_CONTRACT: return ("AC_CONTRACT"); 4097 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4098 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4099 } 4100 return ("AC_UNKNOWN"); 4101} 4102 4103static int 4104xpt_async_size(u_int32_t async_code) 4105{ 4106 4107 switch (async_code) { 4108 case AC_BUS_RESET: return (0); 4109 case AC_UNSOL_RESEL: return (0); 4110 case AC_SCSI_AEN: return (0); 4111 case AC_SENT_BDR: return (0); 4112 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4113 case AC_PATH_DEREGISTERED: return (0); 4114 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4115 case AC_LOST_DEVICE: return (0); 4116 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4117 case AC_INQ_CHANGED: return (0); 4118 case AC_GETDEV_CHANGED: return (0); 4119 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4120 case AC_ADVINFO_CHANGED: return (-1); 4121 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4122 } 4123 return (0); 4124} 4125 4126static int 4127xpt_async_process_dev(struct cam_ed *device, void *arg) 4128{ 4129 union ccb *ccb = arg; 4130 struct cam_path *path = ccb->ccb_h.path; 4131 void *async_arg = ccb->casync.async_arg_ptr; 4132 u_int32_t async_code = ccb->casync.async_code; 4133 int relock; 4134 4135 if (path->device != device 4136 && path->device->lun_id != CAM_LUN_WILDCARD 4137 && device->lun_id != CAM_LUN_WILDCARD) 4138 return (1); 4139 4140 /* 4141 * The async callback could free the device. 4142 * If it is a broadcast async, it doesn't hold 4143 * device reference, so take our own reference. 4144 */ 4145 xpt_acquire_device(device); 4146 4147 /* 4148 * If async for specific device is to be delivered to 4149 * the wildcard client, take the specific device lock. 4150 * XXX: We may need a way for client to specify it. 4151 */ 4152 if ((device->lun_id == CAM_LUN_WILDCARD && 4153 path->device->lun_id != CAM_LUN_WILDCARD) || 4154 (device->target->target_id == CAM_TARGET_WILDCARD && 4155 path->target->target_id != CAM_TARGET_WILDCARD) || 4156 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4157 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4158 mtx_unlock(&device->device_mtx); 4159 xpt_path_lock(path); 4160 relock = 1; 4161 } else 4162 relock = 0; 4163 4164 (*(device->target->bus->xport->ops->async))(async_code, 4165 device->target->bus, device->target, device, async_arg); 4166 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4167 4168 if (relock) { 4169 xpt_path_unlock(path); 4170 mtx_lock(&device->device_mtx); 4171 } 4172 xpt_release_device(device); 4173 return (1); 4174} 4175 4176static int 4177xpt_async_process_tgt(struct cam_et *target, void *arg) 4178{ 4179 union ccb *ccb = arg; 4180 struct cam_path *path = ccb->ccb_h.path; 4181 4182 if (path->target != target 4183 && path->target->target_id != CAM_TARGET_WILDCARD 4184 && target->target_id != CAM_TARGET_WILDCARD) 4185 return (1); 4186 4187 if (ccb->casync.async_code == AC_SENT_BDR) { 4188 /* Update our notion of when the last reset occurred */ 4189 microtime(&target->last_reset); 4190 } 4191 4192 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4193} 4194 4195static void 4196xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4197{ 4198 struct cam_eb *bus; 4199 struct cam_path *path; 4200 void *async_arg; 4201 u_int32_t async_code; 4202 4203 path = ccb->ccb_h.path; 4204 async_code = ccb->casync.async_code; 4205 async_arg = ccb->casync.async_arg_ptr; 4206 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4207 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4208 bus = path->bus; 4209 4210 if (async_code == AC_BUS_RESET) { 4211 /* Update our notion of when the last reset occurred */ 4212 microtime(&bus->last_reset); 4213 } 4214 4215 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4216 4217 /* 4218 * If this wasn't a fully wildcarded async, tell all 4219 * clients that want all async events. 4220 */ 4221 if (bus != xpt_periph->path->bus) { 4222 xpt_path_lock(xpt_periph->path); 4223 xpt_async_process_dev(xpt_periph->path->device, ccb); 4224 xpt_path_unlock(xpt_periph->path); 4225 } 4226 4227 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4228 xpt_release_devq(path, 1, TRUE); 4229 else 4230 xpt_release_simq(path->bus->sim, TRUE); 4231 if (ccb->casync.async_arg_size > 0) 4232 free(async_arg, M_CAMXPT); 4233 xpt_free_path(path); 4234 xpt_free_ccb(ccb); 4235} 4236 4237static void 4238xpt_async_bcast(struct async_list *async_head, 4239 u_int32_t async_code, 4240 struct cam_path *path, void *async_arg) 4241{ 4242 struct async_node *cur_entry; 4243 struct mtx *mtx; 4244 4245 cur_entry = SLIST_FIRST(async_head); 4246 while (cur_entry != NULL) { 4247 struct async_node *next_entry; 4248 /* 4249 * Grab the next list entry before we call the current 4250 * entry's callback. This is because the callback function 4251 * can delete its async callback entry. 4252 */ 4253 next_entry = SLIST_NEXT(cur_entry, links); 4254 if ((cur_entry->event_enable & async_code) != 0) { 4255 mtx = cur_entry->event_lock ? 4256 path->device->sim->mtx : NULL; 4257 if (mtx) 4258 mtx_lock(mtx); 4259 cur_entry->callback(cur_entry->callback_arg, 4260 async_code, path, 4261 async_arg); 4262 if (mtx) 4263 mtx_unlock(mtx); 4264 } 4265 cur_entry = next_entry; 4266 } 4267} 4268 4269void 4270xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4271{ 4272 union ccb *ccb; 4273 int size; 4274 4275 ccb = xpt_alloc_ccb_nowait(); 4276 if (ccb == NULL) { 4277 xpt_print(path, "Can't allocate CCB to send %s\n", 4278 xpt_async_string(async_code)); 4279 return; 4280 } 4281 4282 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4283 xpt_print(path, "Can't allocate path to send %s\n", 4284 xpt_async_string(async_code)); 4285 xpt_free_ccb(ccb); 4286 return; 4287 } 4288 ccb->ccb_h.path->periph = NULL; 4289 ccb->ccb_h.func_code = XPT_ASYNC; 4290 ccb->ccb_h.cbfcnp = xpt_async_process; 4291 ccb->ccb_h.flags |= CAM_UNLOCKED; 4292 ccb->casync.async_code = async_code; 4293 ccb->casync.async_arg_size = 0; 4294 size = xpt_async_size(async_code); 4295 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 4296 ("xpt_async: func %#x %s aync_code %d %s\n", 4297 ccb->ccb_h.func_code, 4298 xpt_action_name(ccb->ccb_h.func_code), 4299 async_code, 4300 xpt_async_string(async_code))); 4301 if (size > 0 && async_arg != NULL) { 4302 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4303 if (ccb->casync.async_arg_ptr == NULL) { 4304 xpt_print(path, "Can't allocate argument to send %s\n", 4305 xpt_async_string(async_code)); 4306 xpt_free_path(ccb->ccb_h.path); 4307 xpt_free_ccb(ccb); 4308 return; 4309 } 4310 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4311 ccb->casync.async_arg_size = size; 4312 } else if (size < 0) { 4313 ccb->casync.async_arg_ptr = async_arg; 4314 ccb->casync.async_arg_size = size; 4315 } 4316 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4317 xpt_freeze_devq(path, 1); 4318 else 4319 xpt_freeze_simq(path->bus->sim, 1); 4320 xpt_done(ccb); 4321} 4322 4323static void 4324xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4325 struct cam_et *target, struct cam_ed *device, 4326 void *async_arg) 4327{ 4328 4329 /* 4330 * We only need to handle events for real devices. 4331 */ 4332 if (target->target_id == CAM_TARGET_WILDCARD 4333 || device->lun_id == CAM_LUN_WILDCARD) 4334 return; 4335 4336 printf("%s called\n", __func__); 4337} 4338 4339static uint32_t 4340xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4341{ 4342 struct cam_devq *devq; 4343 uint32_t freeze; 4344 4345 devq = dev->sim->devq; 4346 mtx_assert(&devq->send_mtx, MA_OWNED); 4347 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4348 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4349 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4350 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4351 /* Remove frozen device from sendq. */ 4352 if (device_is_queued(dev)) 4353 camq_remove(&devq->send_queue, dev->devq_entry.index); 4354 return (freeze); 4355} 4356 4357u_int32_t 4358xpt_freeze_devq(struct cam_path *path, u_int count) 4359{ 4360 struct cam_ed *dev = path->device; 4361 struct cam_devq *devq; 4362 uint32_t freeze; 4363 4364 devq = dev->sim->devq; 4365 mtx_lock(&devq->send_mtx); 4366 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4367 freeze = xpt_freeze_devq_device(dev, count); 4368 mtx_unlock(&devq->send_mtx); 4369 return (freeze); 4370} 4371 4372u_int32_t 4373xpt_freeze_simq(struct cam_sim *sim, u_int count) 4374{ 4375 struct cam_devq *devq; 4376 uint32_t freeze; 4377 4378 devq = sim->devq; 4379 mtx_lock(&devq->send_mtx); 4380 freeze = (devq->send_queue.qfrozen_cnt += count); 4381 mtx_unlock(&devq->send_mtx); 4382 return (freeze); 4383} 4384 4385static void 4386xpt_release_devq_timeout(void *arg) 4387{ 4388 struct cam_ed *dev; 4389 struct cam_devq *devq; 4390 4391 dev = (struct cam_ed *)arg; 4392 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4393 devq = dev->sim->devq; 4394 mtx_assert(&devq->send_mtx, MA_OWNED); 4395 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4396 xpt_run_devq(devq); 4397} 4398 4399void 4400xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4401{ 4402 struct cam_ed *dev; 4403 struct cam_devq *devq; 4404 4405 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4406 count, run_queue)); 4407 dev = path->device; 4408 devq = dev->sim->devq; 4409 mtx_lock(&devq->send_mtx); 4410 if (xpt_release_devq_device(dev, count, run_queue)) 4411 xpt_run_devq(dev->sim->devq); 4412 mtx_unlock(&devq->send_mtx); 4413} 4414 4415static int 4416xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4417{ 4418 4419 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4420 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4421 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4422 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4423 if (count > dev->ccbq.queue.qfrozen_cnt) { 4424#ifdef INVARIANTS 4425 printf("xpt_release_devq(): requested %u > present %u\n", 4426 count, dev->ccbq.queue.qfrozen_cnt); 4427#endif 4428 count = dev->ccbq.queue.qfrozen_cnt; 4429 } 4430 dev->ccbq.queue.qfrozen_cnt -= count; 4431 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4432 /* 4433 * No longer need to wait for a successful 4434 * command completion. 4435 */ 4436 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4437 /* 4438 * Remove any timeouts that might be scheduled 4439 * to release this queue. 4440 */ 4441 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4442 callout_stop(&dev->callout); 4443 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4444 } 4445 /* 4446 * Now that we are unfrozen schedule the 4447 * device so any pending transactions are 4448 * run. 4449 */ 4450 xpt_schedule_devq(dev->sim->devq, dev); 4451 } else 4452 run_queue = 0; 4453 return (run_queue); 4454} 4455 4456void 4457xpt_release_simq(struct cam_sim *sim, int run_queue) 4458{ 4459 struct cam_devq *devq; 4460 4461 devq = sim->devq; 4462 mtx_lock(&devq->send_mtx); 4463 if (devq->send_queue.qfrozen_cnt <= 0) { 4464#ifdef INVARIANTS 4465 printf("xpt_release_simq: requested 1 > present %u\n", 4466 devq->send_queue.qfrozen_cnt); 4467#endif 4468 } else 4469 devq->send_queue.qfrozen_cnt--; 4470 if (devq->send_queue.qfrozen_cnt == 0) { 4471 /* 4472 * If there is a timeout scheduled to release this 4473 * sim queue, remove it. The queue frozen count is 4474 * already at 0. 4475 */ 4476 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4477 callout_stop(&sim->callout); 4478 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4479 } 4480 if (run_queue) { 4481 /* 4482 * Now that we are unfrozen run the send queue. 4483 */ 4484 xpt_run_devq(sim->devq); 4485 } 4486 } 4487 mtx_unlock(&devq->send_mtx); 4488} 4489 4490/* 4491 * XXX Appears to be unused. 4492 */ 4493static void 4494xpt_release_simq_timeout(void *arg) 4495{ 4496 struct cam_sim *sim; 4497 4498 sim = (struct cam_sim *)arg; 4499 xpt_release_simq(sim, /* run_queue */ TRUE); 4500} 4501 4502void 4503xpt_done(union ccb *done_ccb) 4504{ 4505 struct cam_doneq *queue; 4506 int run, hash; 4507 4508 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4509 ("xpt_done: func= %#x %s status %#x\n", 4510 done_ccb->ccb_h.func_code, 4511 xpt_action_name(done_ccb->ccb_h.func_code), 4512 done_ccb->ccb_h.status)); 4513 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4514 return; 4515 4516 /* Store the time the ccb was in the sim */ 4517 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data; 4518 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4519 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4520 queue = &cam_doneqs[hash]; 4521 mtx_lock(&queue->cam_doneq_mtx); 4522 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4523 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4524 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4525 mtx_unlock(&queue->cam_doneq_mtx); 4526 if (run) 4527 wakeup(&queue->cam_doneq); 4528} 4529 4530void 4531xpt_done_direct(union ccb *done_ccb) 4532{ 4533 4534 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4535 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status)); 4536 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4537 return; 4538 4539 /* Store the time the ccb was in the sim */ 4540 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data; 4541 xpt_done_process(&done_ccb->ccb_h); 4542} 4543 4544union ccb * 4545xpt_alloc_ccb() 4546{ 4547 union ccb *new_ccb; 4548 4549 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4550 return (new_ccb); 4551} 4552 4553union ccb * 4554xpt_alloc_ccb_nowait() 4555{ 4556 union ccb *new_ccb; 4557 4558 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4559 return (new_ccb); 4560} 4561 4562void 4563xpt_free_ccb(union ccb *free_ccb) 4564{ 4565 free(free_ccb, M_CAMCCB); 4566} 4567 4568 4569 4570/* Private XPT functions */ 4571 4572/* 4573 * Get a CAM control block for the caller. Charge the structure to the device 4574 * referenced by the path. If we don't have sufficient resources to allocate 4575 * more ccbs, we return NULL. 4576 */ 4577static union ccb * 4578xpt_get_ccb_nowait(struct cam_periph *periph) 4579{ 4580 union ccb *new_ccb; 4581 4582 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4583 if (new_ccb == NULL) 4584 return (NULL); 4585 periph->periph_allocated++; 4586 cam_ccbq_take_opening(&periph->path->device->ccbq); 4587 return (new_ccb); 4588} 4589 4590static union ccb * 4591xpt_get_ccb(struct cam_periph *periph) 4592{ 4593 union ccb *new_ccb; 4594 4595 cam_periph_unlock(periph); 4596 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4597 cam_periph_lock(periph); 4598 periph->periph_allocated++; 4599 cam_ccbq_take_opening(&periph->path->device->ccbq); 4600 return (new_ccb); 4601} 4602 4603union ccb * 4604cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4605{ 4606 struct ccb_hdr *ccb_h; 4607 4608 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4609 cam_periph_assert(periph, MA_OWNED); 4610 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4611 ccb_h->pinfo.priority != priority) { 4612 if (priority < periph->immediate_priority) { 4613 periph->immediate_priority = priority; 4614 xpt_run_allocq(periph, 0); 4615 } else 4616 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4617 "cgticb", 0); 4618 } 4619 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4620 return ((union ccb *)ccb_h); 4621} 4622 4623static void 4624xpt_acquire_bus(struct cam_eb *bus) 4625{ 4626 4627 xpt_lock_buses(); 4628 bus->refcount++; 4629 xpt_unlock_buses(); 4630} 4631 4632static void 4633xpt_release_bus(struct cam_eb *bus) 4634{ 4635 4636 xpt_lock_buses(); 4637 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4638 if (--bus->refcount > 0) { 4639 xpt_unlock_buses(); 4640 return; 4641 } 4642 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4643 xsoftc.bus_generation++; 4644 xpt_unlock_buses(); 4645 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4646 ("destroying bus, but target list is not empty")); 4647 cam_sim_release(bus->sim); 4648 mtx_destroy(&bus->eb_mtx); 4649 free(bus, M_CAMXPT); 4650} 4651 4652static struct cam_et * 4653xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4654{ 4655 struct cam_et *cur_target, *target; 4656 4657 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4658 mtx_assert(&bus->eb_mtx, MA_OWNED); 4659 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4660 M_NOWAIT|M_ZERO); 4661 if (target == NULL) 4662 return (NULL); 4663 4664 TAILQ_INIT(&target->ed_entries); 4665 target->bus = bus; 4666 target->target_id = target_id; 4667 target->refcount = 1; 4668 target->generation = 0; 4669 target->luns = NULL; 4670 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4671 timevalclear(&target->last_reset); 4672 /* 4673 * Hold a reference to our parent bus so it 4674 * will not go away before we do. 4675 */ 4676 bus->refcount++; 4677 4678 /* Insertion sort into our bus's target list */ 4679 cur_target = TAILQ_FIRST(&bus->et_entries); 4680 while (cur_target != NULL && cur_target->target_id < target_id) 4681 cur_target = TAILQ_NEXT(cur_target, links); 4682 if (cur_target != NULL) { 4683 TAILQ_INSERT_BEFORE(cur_target, target, links); 4684 } else { 4685 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4686 } 4687 bus->generation++; 4688 return (target); 4689} 4690 4691static void 4692xpt_acquire_target(struct cam_et *target) 4693{ 4694 struct cam_eb *bus = target->bus; 4695 4696 mtx_lock(&bus->eb_mtx); 4697 target->refcount++; 4698 mtx_unlock(&bus->eb_mtx); 4699} 4700 4701static void 4702xpt_release_target(struct cam_et *target) 4703{ 4704 struct cam_eb *bus = target->bus; 4705 4706 mtx_lock(&bus->eb_mtx); 4707 if (--target->refcount > 0) { 4708 mtx_unlock(&bus->eb_mtx); 4709 return; 4710 } 4711 TAILQ_REMOVE(&bus->et_entries, target, links); 4712 bus->generation++; 4713 mtx_unlock(&bus->eb_mtx); 4714 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4715 ("destroying target, but device list is not empty")); 4716 xpt_release_bus(bus); 4717 mtx_destroy(&target->luns_mtx); 4718 if (target->luns) 4719 free(target->luns, M_CAMXPT); 4720 free(target, M_CAMXPT); 4721} 4722 4723static struct cam_ed * 4724xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4725 lun_id_t lun_id) 4726{ 4727 struct cam_ed *device; 4728 4729 device = xpt_alloc_device(bus, target, lun_id); 4730 if (device == NULL) 4731 return (NULL); 4732 4733 device->mintags = 1; 4734 device->maxtags = 1; 4735 return (device); 4736} 4737 4738static void 4739xpt_destroy_device(void *context, int pending) 4740{ 4741 struct cam_ed *device = context; 4742 4743 mtx_lock(&device->device_mtx); 4744 mtx_destroy(&device->device_mtx); 4745 free(device, M_CAMDEV); 4746} 4747 4748struct cam_ed * 4749xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4750{ 4751 struct cam_ed *cur_device, *device; 4752 struct cam_devq *devq; 4753 cam_status status; 4754 4755 mtx_assert(&bus->eb_mtx, MA_OWNED); 4756 /* Make space for us in the device queue on our bus */ 4757 devq = bus->sim->devq; 4758 mtx_lock(&devq->send_mtx); 4759 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4760 mtx_unlock(&devq->send_mtx); 4761 if (status != CAM_REQ_CMP) 4762 return (NULL); 4763 4764 device = (struct cam_ed *)malloc(sizeof(*device), 4765 M_CAMDEV, M_NOWAIT|M_ZERO); 4766 if (device == NULL) 4767 return (NULL); 4768 4769 cam_init_pinfo(&device->devq_entry); 4770 device->target = target; 4771 device->lun_id = lun_id; 4772 device->sim = bus->sim; 4773 if (cam_ccbq_init(&device->ccbq, 4774 bus->sim->max_dev_openings) != 0) { 4775 free(device, M_CAMDEV); 4776 return (NULL); 4777 } 4778 SLIST_INIT(&device->asyncs); 4779 SLIST_INIT(&device->periphs); 4780 device->generation = 0; 4781 device->flags = CAM_DEV_UNCONFIGURED; 4782 device->tag_delay_count = 0; 4783 device->tag_saved_openings = 0; 4784 device->refcount = 1; 4785 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4786 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4787 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4788 /* 4789 * Hold a reference to our parent bus so it 4790 * will not go away before we do. 4791 */ 4792 target->refcount++; 4793 4794 cur_device = TAILQ_FIRST(&target->ed_entries); 4795 while (cur_device != NULL && cur_device->lun_id < lun_id) 4796 cur_device = TAILQ_NEXT(cur_device, links); 4797 if (cur_device != NULL) 4798 TAILQ_INSERT_BEFORE(cur_device, device, links); 4799 else 4800 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4801 target->generation++; 4802 return (device); 4803} 4804 4805void 4806xpt_acquire_device(struct cam_ed *device) 4807{ 4808 struct cam_eb *bus = device->target->bus; 4809 4810 mtx_lock(&bus->eb_mtx); 4811 device->refcount++; 4812 mtx_unlock(&bus->eb_mtx); 4813} 4814 4815void 4816xpt_release_device(struct cam_ed *device) 4817{ 4818 struct cam_eb *bus = device->target->bus; 4819 struct cam_devq *devq; 4820 4821 mtx_lock(&bus->eb_mtx); 4822 if (--device->refcount > 0) { 4823 mtx_unlock(&bus->eb_mtx); 4824 return; 4825 } 4826 4827 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4828 device->target->generation++; 4829 mtx_unlock(&bus->eb_mtx); 4830 4831 /* Release our slot in the devq */ 4832 devq = bus->sim->devq; 4833 mtx_lock(&devq->send_mtx); 4834 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4835 mtx_unlock(&devq->send_mtx); 4836 4837 KASSERT(SLIST_EMPTY(&device->periphs), 4838 ("destroying device, but periphs list is not empty")); 4839 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4840 ("destroying device while still queued for ccbs")); 4841 4842 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4843 callout_stop(&device->callout); 4844 4845 xpt_release_target(device->target); 4846 4847 cam_ccbq_fini(&device->ccbq); 4848 /* 4849 * Free allocated memory. free(9) does nothing if the 4850 * supplied pointer is NULL, so it is safe to call without 4851 * checking. 4852 */ 4853 free(device->supported_vpds, M_CAMXPT); 4854 free(device->device_id, M_CAMXPT); 4855 free(device->ext_inq, M_CAMXPT); 4856 free(device->physpath, M_CAMXPT); 4857 free(device->rcap_buf, M_CAMXPT); 4858 free(device->serial_num, M_CAMXPT); 4859 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 4860} 4861 4862u_int32_t 4863xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4864{ 4865 int result; 4866 struct cam_ed *dev; 4867 4868 dev = path->device; 4869 mtx_lock(&dev->sim->devq->send_mtx); 4870 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4871 mtx_unlock(&dev->sim->devq->send_mtx); 4872 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4873 || (dev->inq_flags & SID_CmdQue) != 0) 4874 dev->tag_saved_openings = newopenings; 4875 return (result); 4876} 4877 4878static struct cam_eb * 4879xpt_find_bus(path_id_t path_id) 4880{ 4881 struct cam_eb *bus; 4882 4883 xpt_lock_buses(); 4884 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4885 bus != NULL; 4886 bus = TAILQ_NEXT(bus, links)) { 4887 if (bus->path_id == path_id) { 4888 bus->refcount++; 4889 break; 4890 } 4891 } 4892 xpt_unlock_buses(); 4893 return (bus); 4894} 4895 4896static struct cam_et * 4897xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4898{ 4899 struct cam_et *target; 4900 4901 mtx_assert(&bus->eb_mtx, MA_OWNED); 4902 for (target = TAILQ_FIRST(&bus->et_entries); 4903 target != NULL; 4904 target = TAILQ_NEXT(target, links)) { 4905 if (target->target_id == target_id) { 4906 target->refcount++; 4907 break; 4908 } 4909 } 4910 return (target); 4911} 4912 4913static struct cam_ed * 4914xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4915{ 4916 struct cam_ed *device; 4917 4918 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 4919 for (device = TAILQ_FIRST(&target->ed_entries); 4920 device != NULL; 4921 device = TAILQ_NEXT(device, links)) { 4922 if (device->lun_id == lun_id) { 4923 device->refcount++; 4924 break; 4925 } 4926 } 4927 return (device); 4928} 4929 4930void 4931xpt_start_tags(struct cam_path *path) 4932{ 4933 struct ccb_relsim crs; 4934 struct cam_ed *device; 4935 struct cam_sim *sim; 4936 int newopenings; 4937 4938 device = path->device; 4939 sim = path->bus->sim; 4940 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4941 xpt_freeze_devq(path, /*count*/1); 4942 device->inq_flags |= SID_CmdQue; 4943 if (device->tag_saved_openings != 0) 4944 newopenings = device->tag_saved_openings; 4945 else 4946 newopenings = min(device->maxtags, 4947 sim->max_tagged_dev_openings); 4948 xpt_dev_ccbq_resize(path, newopenings); 4949 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4950 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4951 crs.ccb_h.func_code = XPT_REL_SIMQ; 4952 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4953 crs.openings 4954 = crs.release_timeout 4955 = crs.qfrozen_cnt 4956 = 0; 4957 xpt_action((union ccb *)&crs); 4958} 4959 4960void 4961xpt_stop_tags(struct cam_path *path) 4962{ 4963 struct ccb_relsim crs; 4964 struct cam_ed *device; 4965 struct cam_sim *sim; 4966 4967 device = path->device; 4968 sim = path->bus->sim; 4969 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4970 device->tag_delay_count = 0; 4971 xpt_freeze_devq(path, /*count*/1); 4972 device->inq_flags &= ~SID_CmdQue; 4973 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4974 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4975 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4976 crs.ccb_h.func_code = XPT_REL_SIMQ; 4977 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4978 crs.openings 4979 = crs.release_timeout 4980 = crs.qfrozen_cnt 4981 = 0; 4982 xpt_action((union ccb *)&crs); 4983} 4984 4985static void 4986xpt_boot_delay(void *arg) 4987{ 4988 4989 xpt_release_boot(); 4990} 4991 4992static void 4993xpt_config(void *arg) 4994{ 4995 /* 4996 * Now that interrupts are enabled, go find our devices 4997 */ 4998 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 4999 printf("xpt_config: failed to create taskqueue thread.\n"); 5000 5001 /* Setup debugging path */ 5002 if (cam_dflags != CAM_DEBUG_NONE) { 5003 if (xpt_create_path(&cam_dpath, NULL, 5004 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 5005 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 5006 printf("xpt_config: xpt_create_path() failed for debug" 5007 " target %d:%d:%d, debugging disabled\n", 5008 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 5009 cam_dflags = CAM_DEBUG_NONE; 5010 } 5011 } else 5012 cam_dpath = NULL; 5013 5014 periphdriver_init(1); 5015 xpt_hold_boot(); 5016 callout_init(&xsoftc.boot_callout, 1); 5017 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0, 5018 xpt_boot_delay, NULL, 0); 5019 /* Fire up rescan thread. */ 5020 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 5021 "cam", "scanner")) { 5022 printf("xpt_config: failed to create rescan thread.\n"); 5023 } 5024} 5025 5026void 5027xpt_hold_boot(void) 5028{ 5029 xpt_lock_buses(); 5030 xsoftc.buses_to_config++; 5031 xpt_unlock_buses(); 5032} 5033 5034void 5035xpt_release_boot(void) 5036{ 5037 xpt_lock_buses(); 5038 xsoftc.buses_to_config--; 5039 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 5040 struct xpt_task *task; 5041 5042 xsoftc.buses_config_done = 1; 5043 xpt_unlock_buses(); 5044 /* Call manually because we don't have any busses */ 5045 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 5046 if (task != NULL) { 5047 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 5048 taskqueue_enqueue(taskqueue_thread, &task->task); 5049 } 5050 } else 5051 xpt_unlock_buses(); 5052} 5053 5054/* 5055 * If the given device only has one peripheral attached to it, and if that 5056 * peripheral is the passthrough driver, announce it. This insures that the 5057 * user sees some sort of announcement for every peripheral in their system. 5058 */ 5059static int 5060xptpassannouncefunc(struct cam_ed *device, void *arg) 5061{ 5062 struct cam_periph *periph; 5063 int i; 5064 5065 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5066 periph = SLIST_NEXT(periph, periph_links), i++); 5067 5068 periph = SLIST_FIRST(&device->periphs); 5069 if ((i == 1) 5070 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5071 xpt_announce_periph(periph, NULL); 5072 5073 return(1); 5074} 5075 5076static void 5077xpt_finishconfig_task(void *context, int pending) 5078{ 5079 5080 periphdriver_init(2); 5081 /* 5082 * Check for devices with no "standard" peripheral driver 5083 * attached. For any devices like that, announce the 5084 * passthrough driver so the user will see something. 5085 */ 5086 if (!bootverbose) 5087 xpt_for_all_devices(xptpassannouncefunc, NULL); 5088 5089 /* Release our hook so that the boot can continue. */ 5090 config_intrhook_disestablish(xsoftc.xpt_config_hook); 5091 free(xsoftc.xpt_config_hook, M_CAMXPT); 5092 xsoftc.xpt_config_hook = NULL; 5093 5094 free(context, M_CAMXPT); 5095} 5096 5097cam_status 5098xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5099 struct cam_path *path) 5100{ 5101 struct ccb_setasync csa; 5102 cam_status status; 5103 int xptpath = 0; 5104 5105 if (path == NULL) { 5106 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5107 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5108 if (status != CAM_REQ_CMP) 5109 return (status); 5110 xpt_path_lock(path); 5111 xptpath = 1; 5112 } 5113 5114 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5115 csa.ccb_h.func_code = XPT_SASYNC_CB; 5116 csa.event_enable = event; 5117 csa.callback = cbfunc; 5118 csa.callback_arg = cbarg; 5119 xpt_action((union ccb *)&csa); 5120 status = csa.ccb_h.status; 5121 5122 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE, 5123 ("xpt_register_async: func %p\n", cbfunc)); 5124 5125 if (xptpath) { 5126 xpt_path_unlock(path); 5127 xpt_free_path(path); 5128 } 5129 5130 if ((status == CAM_REQ_CMP) && 5131 (csa.event_enable & AC_FOUND_DEVICE)) { 5132 /* 5133 * Get this peripheral up to date with all 5134 * the currently existing devices. 5135 */ 5136 xpt_for_all_devices(xptsetasyncfunc, &csa); 5137 } 5138 if ((status == CAM_REQ_CMP) && 5139 (csa.event_enable & AC_PATH_REGISTERED)) { 5140 /* 5141 * Get this peripheral up to date with all 5142 * the currently existing busses. 5143 */ 5144 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5145 } 5146 5147 return (status); 5148} 5149 5150static void 5151xptaction(struct cam_sim *sim, union ccb *work_ccb) 5152{ 5153 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5154 5155 switch (work_ccb->ccb_h.func_code) { 5156 /* Common cases first */ 5157 case XPT_PATH_INQ: /* Path routing inquiry */ 5158 { 5159 struct ccb_pathinq *cpi; 5160 5161 cpi = &work_ccb->cpi; 5162 cpi->version_num = 1; /* XXX??? */ 5163 cpi->hba_inquiry = 0; 5164 cpi->target_sprt = 0; 5165 cpi->hba_misc = 0; 5166 cpi->hba_eng_cnt = 0; 5167 cpi->max_target = 0; 5168 cpi->max_lun = 0; 5169 cpi->initiator_id = 0; 5170 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5171 strlcpy(cpi->hba_vid, "", HBA_IDLEN); 5172 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5173 cpi->unit_number = sim->unit_number; 5174 cpi->bus_id = sim->bus_id; 5175 cpi->base_transfer_speed = 0; 5176 cpi->protocol = PROTO_UNSPECIFIED; 5177 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5178 cpi->transport = XPORT_UNSPECIFIED; 5179 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5180 cpi->ccb_h.status = CAM_REQ_CMP; 5181 xpt_done(work_ccb); 5182 break; 5183 } 5184 default: 5185 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5186 xpt_done(work_ccb); 5187 break; 5188 } 5189} 5190 5191/* 5192 * The xpt as a "controller" has no interrupt sources, so polling 5193 * is a no-op. 5194 */ 5195static void 5196xptpoll(struct cam_sim *sim) 5197{ 5198} 5199 5200void 5201xpt_lock_buses(void) 5202{ 5203 mtx_lock(&xsoftc.xpt_topo_lock); 5204} 5205 5206void 5207xpt_unlock_buses(void) 5208{ 5209 mtx_unlock(&xsoftc.xpt_topo_lock); 5210} 5211 5212struct mtx * 5213xpt_path_mtx(struct cam_path *path) 5214{ 5215 5216 return (&path->device->device_mtx); 5217} 5218 5219static void 5220xpt_done_process(struct ccb_hdr *ccb_h) 5221{ 5222 struct cam_sim *sim; 5223 struct cam_devq *devq; 5224 struct mtx *mtx = NULL; 5225 5226 if (ccb_h->flags & CAM_HIGH_POWER) { 5227 struct highpowerlist *hphead; 5228 struct cam_ed *device; 5229 5230 mtx_lock(&xsoftc.xpt_highpower_lock); 5231 hphead = &xsoftc.highpowerq; 5232 5233 device = STAILQ_FIRST(hphead); 5234 5235 /* 5236 * Increment the count since this command is done. 5237 */ 5238 xsoftc.num_highpower++; 5239 5240 /* 5241 * Any high powered commands queued up? 5242 */ 5243 if (device != NULL) { 5244 5245 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5246 mtx_unlock(&xsoftc.xpt_highpower_lock); 5247 5248 mtx_lock(&device->sim->devq->send_mtx); 5249 xpt_release_devq_device(device, 5250 /*count*/1, /*runqueue*/TRUE); 5251 mtx_unlock(&device->sim->devq->send_mtx); 5252 } else 5253 mtx_unlock(&xsoftc.xpt_highpower_lock); 5254 } 5255 5256 sim = ccb_h->path->bus->sim; 5257 5258 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5259 xpt_release_simq(sim, /*run_queue*/FALSE); 5260 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5261 } 5262 5263 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5264 && (ccb_h->status & CAM_DEV_QFRZN)) { 5265 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5266 ccb_h->status &= ~CAM_DEV_QFRZN; 5267 } 5268 5269 devq = sim->devq; 5270 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5271 struct cam_ed *dev = ccb_h->path->device; 5272 5273 mtx_lock(&devq->send_mtx); 5274 devq->send_active--; 5275 devq->send_openings++; 5276 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5277 5278 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5279 && (dev->ccbq.dev_active == 0))) { 5280 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5281 xpt_release_devq_device(dev, /*count*/1, 5282 /*run_queue*/FALSE); 5283 } 5284 5285 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5286 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5287 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5288 xpt_release_devq_device(dev, /*count*/1, 5289 /*run_queue*/FALSE); 5290 } 5291 5292 if (!device_is_queued(dev)) 5293 (void)xpt_schedule_devq(devq, dev); 5294 xpt_run_devq(devq); 5295 mtx_unlock(&devq->send_mtx); 5296 5297 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5298 mtx = xpt_path_mtx(ccb_h->path); 5299 mtx_lock(mtx); 5300 5301 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5302 && (--dev->tag_delay_count == 0)) 5303 xpt_start_tags(ccb_h->path); 5304 } 5305 } 5306 5307 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5308 if (mtx == NULL) { 5309 mtx = xpt_path_mtx(ccb_h->path); 5310 mtx_lock(mtx); 5311 } 5312 } else { 5313 if (mtx != NULL) { 5314 mtx_unlock(mtx); 5315 mtx = NULL; 5316 } 5317 } 5318 5319 /* Call the peripheral driver's callback */ 5320 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5321 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5322 if (mtx != NULL) 5323 mtx_unlock(mtx); 5324} 5325 5326void 5327xpt_done_td(void *arg) 5328{ 5329 struct cam_doneq *queue = arg; 5330 struct ccb_hdr *ccb_h; 5331 STAILQ_HEAD(, ccb_hdr) doneq; 5332 5333 STAILQ_INIT(&doneq); 5334 mtx_lock(&queue->cam_doneq_mtx); 5335 while (1) { 5336 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5337 queue->cam_doneq_sleep = 1; 5338 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5339 PRIBIO, "-", 0); 5340 queue->cam_doneq_sleep = 0; 5341 } 5342 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5343 mtx_unlock(&queue->cam_doneq_mtx); 5344 5345 THREAD_NO_SLEEPING(); 5346 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5347 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5348 xpt_done_process(ccb_h); 5349 } 5350 THREAD_SLEEPING_OK(); 5351 5352 mtx_lock(&queue->cam_doneq_mtx); 5353 } 5354} 5355 5356static void 5357camisr_runqueue(void) 5358{ 5359 struct ccb_hdr *ccb_h; 5360 struct cam_doneq *queue; 5361 int i; 5362 5363 /* Process global queues. */ 5364 for (i = 0; i < cam_num_doneqs; i++) { 5365 queue = &cam_doneqs[i]; 5366 mtx_lock(&queue->cam_doneq_mtx); 5367 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5368 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5369 mtx_unlock(&queue->cam_doneq_mtx); 5370 xpt_done_process(ccb_h); 5371 mtx_lock(&queue->cam_doneq_mtx); 5372 } 5373 mtx_unlock(&queue->cam_doneq_mtx); 5374 } 5375} 5376 5377struct kv 5378{ 5379 uint32_t v; 5380 const char *name; 5381}; 5382 5383static struct kv map[] = { 5384 { XPT_NOOP, "XPT_NOOP" }, 5385 { XPT_SCSI_IO, "XPT_SCSI_IO" }, 5386 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" }, 5387 { XPT_GDEVLIST, "XPT_GDEVLIST" }, 5388 { XPT_PATH_INQ, "XPT_PATH_INQ" }, 5389 { XPT_REL_SIMQ, "XPT_REL_SIMQ" }, 5390 { XPT_SASYNC_CB, "XPT_SASYNC_CB" }, 5391 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" }, 5392 { XPT_SCAN_BUS, "XPT_SCAN_BUS" }, 5393 { XPT_DEV_MATCH, "XPT_DEV_MATCH" }, 5394 { XPT_DEBUG, "XPT_DEBUG" }, 5395 { XPT_PATH_STATS, "XPT_PATH_STATS" }, 5396 { XPT_GDEV_STATS, "XPT_GDEV_STATS" }, 5397 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" }, 5398 { XPT_ASYNC, "XPT_ASYNC" }, 5399 { XPT_ABORT, "XPT_ABORT" }, 5400 { XPT_RESET_BUS, "XPT_RESET_BUS" }, 5401 { XPT_RESET_DEV, "XPT_RESET_DEV" }, 5402 { XPT_TERM_IO, "XPT_TERM_IO" }, 5403 { XPT_SCAN_LUN, "XPT_SCAN_LUN" }, 5404 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" }, 5405 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" }, 5406 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" }, 5407 { XPT_ATA_IO, "XPT_ATA_IO" }, 5408 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" }, 5409 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" }, 5410 { XPT_NVME_IO, "XPT_NVME_IO" }, 5411 { XPT_MMCSD_IO, "XPT_MMCSD_IO" }, 5412 { XPT_SMP_IO, "XPT_SMP_IO" }, 5413 { XPT_SCAN_TGT, "XPT_SCAN_TGT" }, 5414 { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" }, 5415 { XPT_ENG_INQ, "XPT_ENG_INQ" }, 5416 { XPT_ENG_EXEC, "XPT_ENG_EXEC" }, 5417 { XPT_EN_LUN, "XPT_EN_LUN" }, 5418 { XPT_TARGET_IO, "XPT_TARGET_IO" }, 5419 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" }, 5420 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" }, 5421 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" }, 5422 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" }, 5423 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" }, 5424 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" }, 5425 { 0, 0 } 5426}; 5427 5428static const char * 5429xpt_action_name(uint32_t action) 5430{ 5431 static char buffer[32]; /* Only for unknown messages -- racy */ 5432 struct kv *walker = map; 5433 5434 while (walker->name != NULL) { 5435 if (walker->v == action) 5436 return (walker->name); 5437 walker++; 5438 } 5439 5440 snprintf(buffer, sizeof(buffer), "%#x", action); 5441 return (buffer); 5442} 5443