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