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sys/cam/cam_xpt.c
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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: releng/8.1/sys/cam/cam_xpt.c 207774 2010-05-08 13:09:36Z mav $"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/systm.h> 36 #include <sys/types.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/time.h> 40 #include <sys/conf.h> 41 #include <sys/fcntl.h> 42 #include <sys/md5.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/taskqueue.h> 46 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 #include <sys/sysctl.h> 50 #include <sys/kthread.h> 51 52 #ifdef PC98 53 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */ 54 #endif 55 56 #include <cam/cam.h> 57 #include <cam/cam_ccb.h> 58 #include <cam/cam_periph.h> 59 #include <cam/cam_queue.h> 60 #include <cam/cam_sim.h> 61 #include <cam/cam_xpt.h> 62 #include <cam/cam_xpt_sim.h> 63 #include <cam/cam_xpt_periph.h> 64 #include <cam/cam_xpt_internal.h> 65 #include <cam/cam_debug.h> 66 67 #include <cam/scsi/scsi_all.h> 68 #include <cam/scsi/scsi_message.h> 69 #include <cam/scsi/scsi_pass.h> 70 #include <machine/stdarg.h> /* for xpt_print below */ 71 #include "opt_cam.h" 72 73 /* 74 * This is the maximum number of high powered commands (e.g. start unit) 75 * that can be outstanding at a particular time. 76 */ 77 #ifndef CAM_MAX_HIGHPOWER 78 #define CAM_MAX_HIGHPOWER 4 79 #endif 80 81 /* Datastructures internal to the xpt layer */ 82 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 83 84 /* Object for defering XPT actions to a taskqueue */ 85 struct xpt_task { 86 struct task task; 87 void *data1; 88 uintptr_t data2; 89 }; 90 91 typedef enum { 92 XPT_FLAG_OPEN = 0x01 93 } xpt_flags; 94 95 struct xpt_softc { 96 xpt_flags flags; 97 u_int32_t xpt_generation; 98 99 /* number of high powered commands that can go through right now */ 100 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 101 int num_highpower; 102 103 /* queue for handling async rescan requests. */ 104 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 105 int buses_to_config; 106 int buses_config_done; 107 108 /* Registered busses */ 109 TAILQ_HEAD(,cam_eb) xpt_busses; 110 u_int bus_generation; 111 112 struct intr_config_hook *xpt_config_hook; 113 114 int boot_delay; 115 struct callout boot_callout; 116 117 struct mtx xpt_topo_lock; 118 struct mtx xpt_lock; 119 }; 120 121 typedef enum { 122 DM_RET_COPY = 0x01, 123 DM_RET_FLAG_MASK = 0x0f, 124 DM_RET_NONE = 0x00, 125 DM_RET_STOP = 0x10, 126 DM_RET_DESCEND = 0x20, 127 DM_RET_ERROR = 0x30, 128 DM_RET_ACTION_MASK = 0xf0 129 } dev_match_ret; 130 131 typedef enum { 132 XPT_DEPTH_BUS, 133 XPT_DEPTH_TARGET, 134 XPT_DEPTH_DEVICE, 135 XPT_DEPTH_PERIPH 136 } xpt_traverse_depth; 137 138 struct xpt_traverse_config { 139 xpt_traverse_depth depth; 140 void *tr_func; 141 void *tr_arg; 142 }; 143 144 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 145 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 146 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 147 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 148 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 149 150 /* Transport layer configuration information */ 151 static struct xpt_softc xsoftc; 152 153 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay); 154 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 155 &xsoftc.boot_delay, 0, "Bus registration wait time"); 156 157 /* Queues for our software interrupt handler */ 158 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 159 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 160 static cam_simq_t cam_simq; 161 static struct mtx cam_simq_lock; 162 163 /* Pointers to software interrupt handlers */ 164 static void *cambio_ih; 165 166 struct cam_periph *xpt_periph; 167 168 static periph_init_t xpt_periph_init; 169 170 static struct periph_driver xpt_driver = 171 { 172 xpt_periph_init, "xpt", 173 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 174 CAM_PERIPH_DRV_EARLY 175 }; 176 177 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 178 179 static d_open_t xptopen; 180 static d_close_t xptclose; 181 static d_ioctl_t xptioctl; 182 183 static struct cdevsw xpt_cdevsw = { 184 .d_version = D_VERSION, 185 .d_flags = 0, 186 .d_open = xptopen, 187 .d_close = xptclose, 188 .d_ioctl = xptioctl, 189 .d_name = "xpt", 190 }; 191 192 /* Storage for debugging datastructures */ 193 #ifdef CAMDEBUG 194 struct cam_path *cam_dpath; 195 u_int32_t cam_dflags; 196 u_int32_t cam_debug_delay; 197 #endif 198 199 /* Our boot-time initialization hook */ 200 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 201 202 static moduledata_t cam_moduledata = { 203 "cam", 204 cam_module_event_handler, 205 NULL 206 }; 207 208 static int xpt_init(void *); 209 210 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 211 MODULE_VERSION(cam, 1); 212 213 214 static void xpt_async_bcast(struct async_list *async_head, 215 u_int32_t async_code, 216 struct cam_path *path, 217 void *async_arg); 218 static path_id_t xptnextfreepathid(void); 219 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 220 static union ccb *xpt_get_ccb(struct cam_ed *device); 221 static void xpt_run_dev_allocq(struct cam_eb *bus); 222 static void xpt_run_dev_sendq(struct cam_eb *bus); 223 static timeout_t xpt_release_devq_timeout; 224 static void xpt_release_simq_timeout(void *arg) __unused; 225 static void xpt_release_bus(struct cam_eb *bus); 226 static void xpt_release_devq_device(struct cam_ed *dev, cam_rl rl, 227 u_int count, int run_queue); 228 static struct cam_et* 229 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 230 static void xpt_release_target(struct cam_et *target); 231 static struct cam_eb* 232 xpt_find_bus(path_id_t path_id); 233 static struct cam_et* 234 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 235 static struct cam_ed* 236 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 237 static void xpt_config(void *arg); 238 static xpt_devicefunc_t xptpassannouncefunc; 239 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 240 static void xptpoll(struct cam_sim *sim); 241 static void camisr(void *); 242 static void camisr_runqueue(void *); 243 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 244 u_int num_patterns, struct cam_eb *bus); 245 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 246 u_int num_patterns, 247 struct cam_ed *device); 248 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 249 u_int num_patterns, 250 struct cam_periph *periph); 251 static xpt_busfunc_t xptedtbusfunc; 252 static xpt_targetfunc_t xptedttargetfunc; 253 static xpt_devicefunc_t xptedtdevicefunc; 254 static xpt_periphfunc_t xptedtperiphfunc; 255 static xpt_pdrvfunc_t xptplistpdrvfunc; 256 static xpt_periphfunc_t xptplistperiphfunc; 257 static int xptedtmatch(struct ccb_dev_match *cdm); 258 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 259 static int xptbustraverse(struct cam_eb *start_bus, 260 xpt_busfunc_t *tr_func, void *arg); 261 static int xpttargettraverse(struct cam_eb *bus, 262 struct cam_et *start_target, 263 xpt_targetfunc_t *tr_func, void *arg); 264 static int xptdevicetraverse(struct cam_et *target, 265 struct cam_ed *start_device, 266 xpt_devicefunc_t *tr_func, void *arg); 267 static int xptperiphtraverse(struct cam_ed *device, 268 struct cam_periph *start_periph, 269 xpt_periphfunc_t *tr_func, void *arg); 270 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 271 xpt_pdrvfunc_t *tr_func, void *arg); 272 static int xptpdperiphtraverse(struct periph_driver **pdrv, 273 struct cam_periph *start_periph, 274 xpt_periphfunc_t *tr_func, 275 void *arg); 276 static xpt_busfunc_t xptdefbusfunc; 277 static xpt_targetfunc_t xptdeftargetfunc; 278 static xpt_devicefunc_t xptdefdevicefunc; 279 static xpt_periphfunc_t xptdefperiphfunc; 280 static void xpt_finishconfig_task(void *context, int pending); 281 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 282 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 283 void *arg); 284 static void xpt_dev_async_default(u_int32_t async_code, 285 struct cam_eb *bus, 286 struct cam_et *target, 287 struct cam_ed *device, 288 void *async_arg); 289 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 290 struct cam_et *target, 291 lun_id_t lun_id); 292 static xpt_devicefunc_t xptsetasyncfunc; 293 static xpt_busfunc_t xptsetasyncbusfunc; 294 static cam_status xptregister(struct cam_periph *periph, 295 void *arg); 296 static __inline int periph_is_queued(struct cam_periph *periph); 297 static __inline int device_is_alloc_queued(struct cam_ed *device); 298 static __inline int device_is_send_queued(struct cam_ed *device); 299 300 static __inline int 301 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 302 { 303 int retval; 304 305 if ((dev->drvq.entries > 0) && 306 (dev->ccbq.devq_openings > 0) && 307 (cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 308 CAMQ_GET_PRIO(&dev->drvq))) == 0)) { 309 /* 310 * The priority of a device waiting for CCB resources 311 * is that of the the highest priority peripheral driver 312 * enqueued. 313 */ 314 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 315 &dev->alloc_ccb_entry.pinfo, 316 CAMQ_GET_PRIO(&dev->drvq)); 317 } else { 318 retval = 0; 319 } 320 321 return (retval); 322 } 323 324 static __inline int 325 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 326 { 327 int retval; 328 329 if ((dev->ccbq.queue.entries > 0) && 330 (dev->ccbq.dev_openings > 0) && 331 (cam_ccbq_frozen_top(&dev->ccbq) == 0)) { 332 /* 333 * The priority of a device waiting for controller 334 * resources is that of the the highest priority CCB 335 * enqueued. 336 */ 337 retval = 338 xpt_schedule_dev(&bus->sim->devq->send_queue, 339 &dev->send_ccb_entry.pinfo, 340 CAMQ_GET_PRIO(&dev->ccbq.queue)); 341 } else { 342 retval = 0; 343 } 344 return (retval); 345 } 346 347 static __inline int 348 periph_is_queued(struct cam_periph *periph) 349 { 350 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 351 } 352 353 static __inline int 354 device_is_alloc_queued(struct cam_ed *device) 355 { 356 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 357 } 358 359 static __inline int 360 device_is_send_queued(struct cam_ed *device) 361 { 362 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 363 } 364 365 static void 366 xpt_periph_init() 367 { 368 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 369 } 370 371 static void 372 xptdone(struct cam_periph *periph, union ccb *done_ccb) 373 { 374 /* Caller will release the CCB */ 375 wakeup(&done_ccb->ccb_h.cbfcnp); 376 } 377 378 static int 379 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 380 { 381 382 /* 383 * Only allow read-write access. 384 */ 385 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 386 return(EPERM); 387 388 /* 389 * We don't allow nonblocking access. 390 */ 391 if ((flags & O_NONBLOCK) != 0) { 392 printf("%s: can't do nonblocking access\n", devtoname(dev)); 393 return(ENODEV); 394 } 395 396 /* Mark ourselves open */ 397 mtx_lock(&xsoftc.xpt_lock); 398 xsoftc.flags |= XPT_FLAG_OPEN; 399 mtx_unlock(&xsoftc.xpt_lock); 400 401 return(0); 402 } 403 404 static int 405 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 406 { 407 408 /* Mark ourselves closed */ 409 mtx_lock(&xsoftc.xpt_lock); 410 xsoftc.flags &= ~XPT_FLAG_OPEN; 411 mtx_unlock(&xsoftc.xpt_lock); 412 413 return(0); 414 } 415 416 /* 417 * Don't automatically grab the xpt softc lock here even though this is going 418 * through the xpt device. The xpt device is really just a back door for 419 * accessing other devices and SIMs, so the right thing to do is to grab 420 * the appropriate SIM lock once the bus/SIM is located. 421 */ 422 static int 423 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 424 { 425 int error; 426 427 error = 0; 428 429 switch(cmd) { 430 /* 431 * For the transport layer CAMIOCOMMAND ioctl, we really only want 432 * to accept CCB types that don't quite make sense to send through a 433 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 434 * in the CAM spec. 435 */ 436 case CAMIOCOMMAND: { 437 union ccb *ccb; 438 union ccb *inccb; 439 struct cam_eb *bus; 440 441 inccb = (union ccb *)addr; 442 443 bus = xpt_find_bus(inccb->ccb_h.path_id); 444 if (bus == NULL) { 445 error = EINVAL; 446 break; 447 } 448 449 switch(inccb->ccb_h.func_code) { 450 case XPT_SCAN_BUS: 451 case XPT_RESET_BUS: 452 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 453 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 454 error = EINVAL; 455 break; 456 } 457 /* FALLTHROUGH */ 458 case XPT_PATH_INQ: 459 case XPT_ENG_INQ: 460 case XPT_SCAN_LUN: 461 462 ccb = xpt_alloc_ccb(); 463 464 CAM_SIM_LOCK(bus->sim); 465 466 /* 467 * Create a path using the bus, target, and lun the 468 * user passed in. 469 */ 470 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 471 inccb->ccb_h.path_id, 472 inccb->ccb_h.target_id, 473 inccb->ccb_h.target_lun) != 474 CAM_REQ_CMP){ 475 error = EINVAL; 476 CAM_SIM_UNLOCK(bus->sim); 477 xpt_free_ccb(ccb); 478 break; 479 } 480 /* Ensure all of our fields are correct */ 481 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 482 inccb->ccb_h.pinfo.priority); 483 xpt_merge_ccb(ccb, inccb); 484 ccb->ccb_h.cbfcnp = xptdone; 485 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 486 bcopy(ccb, inccb, sizeof(union ccb)); 487 xpt_free_path(ccb->ccb_h.path); 488 xpt_free_ccb(ccb); 489 CAM_SIM_UNLOCK(bus->sim); 490 break; 491 492 case XPT_DEBUG: { 493 union ccb ccb; 494 495 /* 496 * This is an immediate CCB, so it's okay to 497 * allocate it on the stack. 498 */ 499 500 CAM_SIM_LOCK(bus->sim); 501 502 /* 503 * Create a path using the bus, target, and lun the 504 * user passed in. 505 */ 506 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 507 inccb->ccb_h.path_id, 508 inccb->ccb_h.target_id, 509 inccb->ccb_h.target_lun) != 510 CAM_REQ_CMP){ 511 error = EINVAL; 512 CAM_SIM_UNLOCK(bus->sim); 513 break; 514 } 515 /* Ensure all of our fields are correct */ 516 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 517 inccb->ccb_h.pinfo.priority); 518 xpt_merge_ccb(&ccb, inccb); 519 ccb.ccb_h.cbfcnp = xptdone; 520 xpt_action(&ccb); 521 CAM_SIM_UNLOCK(bus->sim); 522 bcopy(&ccb, inccb, sizeof(union ccb)); 523 xpt_free_path(ccb.ccb_h.path); 524 break; 525 526 } 527 case XPT_DEV_MATCH: { 528 struct cam_periph_map_info mapinfo; 529 struct cam_path *old_path; 530 531 /* 532 * We can't deal with physical addresses for this 533 * type of transaction. 534 */ 535 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 536 error = EINVAL; 537 break; 538 } 539 540 /* 541 * Save this in case the caller had it set to 542 * something in particular. 543 */ 544 old_path = inccb->ccb_h.path; 545 546 /* 547 * We really don't need a path for the matching 548 * code. The path is needed because of the 549 * debugging statements in xpt_action(). They 550 * assume that the CCB has a valid path. 551 */ 552 inccb->ccb_h.path = xpt_periph->path; 553 554 bzero(&mapinfo, sizeof(mapinfo)); 555 556 /* 557 * Map the pattern and match buffers into kernel 558 * virtual address space. 559 */ 560 error = cam_periph_mapmem(inccb, &mapinfo); 561 562 if (error) { 563 inccb->ccb_h.path = old_path; 564 break; 565 } 566 567 /* 568 * This is an immediate CCB, we can send it on directly. 569 */ 570 xpt_action(inccb); 571 572 /* 573 * Map the buffers back into user space. 574 */ 575 cam_periph_unmapmem(inccb, &mapinfo); 576 577 inccb->ccb_h.path = old_path; 578 579 error = 0; 580 break; 581 } 582 default: 583 error = ENOTSUP; 584 break; 585 } 586 xpt_release_bus(bus); 587 break; 588 } 589 /* 590 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 591 * with the periphal driver name and unit name filled in. The other 592 * fields don't really matter as input. The passthrough driver name 593 * ("pass"), and unit number are passed back in the ccb. The current 594 * device generation number, and the index into the device peripheral 595 * driver list, and the status are also passed back. Note that 596 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 597 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 598 * (or rather should be) impossible for the device peripheral driver 599 * list to change since we look at the whole thing in one pass, and 600 * we do it with lock protection. 601 * 602 */ 603 case CAMGETPASSTHRU: { 604 union ccb *ccb; 605 struct cam_periph *periph; 606 struct periph_driver **p_drv; 607 char *name; 608 u_int unit; 609 u_int cur_generation; 610 int base_periph_found; 611 int splbreaknum; 612 613 ccb = (union ccb *)addr; 614 unit = ccb->cgdl.unit_number; 615 name = ccb->cgdl.periph_name; 616 /* 617 * Every 100 devices, we want to drop our lock protection to 618 * give the software interrupt handler a chance to run. 619 * Most systems won't run into this check, but this should 620 * avoid starvation in the software interrupt handler in 621 * large systems. 622 */ 623 splbreaknum = 100; 624 625 ccb = (union ccb *)addr; 626 627 base_periph_found = 0; 628 629 /* 630 * Sanity check -- make sure we don't get a null peripheral 631 * driver name. 632 */ 633 if (*ccb->cgdl.periph_name == '\0') { 634 error = EINVAL; 635 break; 636 } 637 638 /* Keep the list from changing while we traverse it */ 639 mtx_lock(&xsoftc.xpt_topo_lock); 640 ptstartover: 641 cur_generation = xsoftc.xpt_generation; 642 643 /* first find our driver in the list of drivers */ 644 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 645 if (strcmp((*p_drv)->driver_name, name) == 0) 646 break; 647 648 if (*p_drv == NULL) { 649 mtx_unlock(&xsoftc.xpt_topo_lock); 650 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 651 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 652 *ccb->cgdl.periph_name = '\0'; 653 ccb->cgdl.unit_number = 0; 654 error = ENOENT; 655 break; 656 } 657 658 /* 659 * Run through every peripheral instance of this driver 660 * and check to see whether it matches the unit passed 661 * in by the user. If it does, get out of the loops and 662 * find the passthrough driver associated with that 663 * peripheral driver. 664 */ 665 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 666 periph = TAILQ_NEXT(periph, unit_links)) { 667 668 if (periph->unit_number == unit) { 669 break; 670 } else if (--splbreaknum == 0) { 671 mtx_unlock(&xsoftc.xpt_topo_lock); 672 mtx_lock(&xsoftc.xpt_topo_lock); 673 splbreaknum = 100; 674 if (cur_generation != xsoftc.xpt_generation) 675 goto ptstartover; 676 } 677 } 678 /* 679 * If we found the peripheral driver that the user passed 680 * in, go through all of the peripheral drivers for that 681 * particular device and look for a passthrough driver. 682 */ 683 if (periph != NULL) { 684 struct cam_ed *device; 685 int i; 686 687 base_periph_found = 1; 688 device = periph->path->device; 689 for (i = 0, periph = SLIST_FIRST(&device->periphs); 690 periph != NULL; 691 periph = SLIST_NEXT(periph, periph_links), i++) { 692 /* 693 * Check to see whether we have a 694 * passthrough device or not. 695 */ 696 if (strcmp(periph->periph_name, "pass") == 0) { 697 /* 698 * Fill in the getdevlist fields. 699 */ 700 strcpy(ccb->cgdl.periph_name, 701 periph->periph_name); 702 ccb->cgdl.unit_number = 703 periph->unit_number; 704 if (SLIST_NEXT(periph, periph_links)) 705 ccb->cgdl.status = 706 CAM_GDEVLIST_MORE_DEVS; 707 else 708 ccb->cgdl.status = 709 CAM_GDEVLIST_LAST_DEVICE; 710 ccb->cgdl.generation = 711 device->generation; 712 ccb->cgdl.index = i; 713 /* 714 * Fill in some CCB header fields 715 * that the user may want. 716 */ 717 ccb->ccb_h.path_id = 718 periph->path->bus->path_id; 719 ccb->ccb_h.target_id = 720 periph->path->target->target_id; 721 ccb->ccb_h.target_lun = 722 periph->path->device->lun_id; 723 ccb->ccb_h.status = CAM_REQ_CMP; 724 break; 725 } 726 } 727 } 728 729 /* 730 * If the periph is null here, one of two things has 731 * happened. The first possibility is that we couldn't 732 * find the unit number of the particular peripheral driver 733 * that the user is asking about. e.g. the user asks for 734 * the passthrough driver for "da11". We find the list of 735 * "da" peripherals all right, but there is no unit 11. 736 * The other possibility is that we went through the list 737 * of peripheral drivers attached to the device structure, 738 * but didn't find one with the name "pass". Either way, 739 * we return ENOENT, since we couldn't find something. 740 */ 741 if (periph == NULL) { 742 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 743 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 744 *ccb->cgdl.periph_name = '\0'; 745 ccb->cgdl.unit_number = 0; 746 error = ENOENT; 747 /* 748 * It is unfortunate that this is even necessary, 749 * but there are many, many clueless users out there. 750 * If this is true, the user is looking for the 751 * passthrough driver, but doesn't have one in his 752 * kernel. 753 */ 754 if (base_periph_found == 1) { 755 printf("xptioctl: pass driver is not in the " 756 "kernel\n"); 757 printf("xptioctl: put \"device pass\" in " 758 "your kernel config file\n"); 759 } 760 } 761 mtx_unlock(&xsoftc.xpt_topo_lock); 762 break; 763 } 764 default: 765 error = ENOTTY; 766 break; 767 } 768 769 return(error); 770 } 771 772 static int 773 cam_module_event_handler(module_t mod, int what, void *arg) 774 { 775 int error; 776 777 switch (what) { 778 case MOD_LOAD: 779 if ((error = xpt_init(NULL)) != 0) 780 return (error); 781 break; 782 case MOD_UNLOAD: 783 return EBUSY; 784 default: 785 return EOPNOTSUPP; 786 } 787 788 return 0; 789 } 790 791 static void 792 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 793 { 794 795 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 796 xpt_free_path(done_ccb->ccb_h.path); 797 xpt_free_ccb(done_ccb); 798 } else { 799 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 800 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 801 } 802 xpt_release_boot(); 803 } 804 805 /* thread to handle bus rescans */ 806 static void 807 xpt_scanner_thread(void *dummy) 808 { 809 union ccb *ccb; 810 struct cam_sim *sim; 811 812 xpt_lock_buses(); 813 for (;;) { 814 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 815 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 816 "ccb_scanq", 0); 817 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 818 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 819 xpt_unlock_buses(); 820 821 sim = ccb->ccb_h.path->bus->sim; 822 CAM_SIM_LOCK(sim); 823 xpt_action(ccb); 824 CAM_SIM_UNLOCK(sim); 825 826 xpt_lock_buses(); 827 } 828 } 829 } 830 831 void 832 xpt_rescan(union ccb *ccb) 833 { 834 struct ccb_hdr *hdr; 835 836 /* Prepare request */ 837 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD || 838 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 839 ccb->ccb_h.func_code = XPT_SCAN_BUS; 840 else 841 ccb->ccb_h.func_code = XPT_SCAN_LUN; 842 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 843 ccb->ccb_h.cbfcnp = xpt_rescan_done; 844 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 845 /* Don't make duplicate entries for the same paths. */ 846 xpt_lock_buses(); 847 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 848 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 849 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 850 wakeup(&xsoftc.ccb_scanq); 851 xpt_unlock_buses(); 852 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 853 xpt_free_path(ccb->ccb_h.path); 854 xpt_free_ccb(ccb); 855 return; 856 } 857 } 858 } 859 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 860 xsoftc.buses_to_config++; 861 wakeup(&xsoftc.ccb_scanq); 862 xpt_unlock_buses(); 863 } 864 865 /* Functions accessed by the peripheral drivers */ 866 static int 867 xpt_init(void *dummy) 868 { 869 struct cam_sim *xpt_sim; 870 struct cam_path *path; 871 struct cam_devq *devq; 872 cam_status status; 873 874 TAILQ_INIT(&xsoftc.xpt_busses); 875 TAILQ_INIT(&cam_simq); 876 TAILQ_INIT(&xsoftc.ccb_scanq); 877 STAILQ_INIT(&xsoftc.highpowerq); 878 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 879 880 mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF); 881 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 882 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF); 883 884 /* 885 * The xpt layer is, itself, the equivelent of a SIM. 886 * Allow 16 ccbs in the ccb pool for it. This should 887 * give decent parallelism when we probe busses and 888 * perform other XPT functions. 889 */ 890 devq = cam_simq_alloc(16); 891 xpt_sim = cam_sim_alloc(xptaction, 892 xptpoll, 893 "xpt", 894 /*softc*/NULL, 895 /*unit*/0, 896 /*mtx*/&xsoftc.xpt_lock, 897 /*max_dev_transactions*/0, 898 /*max_tagged_dev_transactions*/0, 899 devq); 900 if (xpt_sim == NULL) 901 return (ENOMEM); 902 903 mtx_lock(&xsoftc.xpt_lock); 904 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 905 mtx_unlock(&xsoftc.xpt_lock); 906 printf("xpt_init: xpt_bus_register failed with status %#x," 907 " failing attach\n", status); 908 return (EINVAL); 909 } 910 911 /* 912 * Looking at the XPT from the SIM layer, the XPT is 913 * the equivelent of a peripheral driver. Allocate 914 * a peripheral driver entry for us. 915 */ 916 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 917 CAM_TARGET_WILDCARD, 918 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 919 mtx_unlock(&xsoftc.xpt_lock); 920 printf("xpt_init: xpt_create_path failed with status %#x," 921 " failing attach\n", status); 922 return (EINVAL); 923 } 924 925 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 926 path, NULL, 0, xpt_sim); 927 xpt_free_path(path); 928 mtx_unlock(&xsoftc.xpt_lock); 929 /* Install our software interrupt handlers */ 930 swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih); 931 /* 932 * Register a callback for when interrupts are enabled. 933 */ 934 xsoftc.xpt_config_hook = 935 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 936 M_CAMXPT, M_NOWAIT | M_ZERO); 937 if (xsoftc.xpt_config_hook == NULL) { 938 printf("xpt_init: Cannot malloc config hook " 939 "- failing attach\n"); 940 return (ENOMEM); 941 } 942 xsoftc.xpt_config_hook->ich_func = xpt_config; 943 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 944 free (xsoftc.xpt_config_hook, M_CAMXPT); 945 printf("xpt_init: config_intrhook_establish failed " 946 "- failing attach\n"); 947 } 948 949 return (0); 950 } 951 952 static cam_status 953 xptregister(struct cam_periph *periph, void *arg) 954 { 955 struct cam_sim *xpt_sim; 956 957 if (periph == NULL) { 958 printf("xptregister: periph was NULL!!\n"); 959 return(CAM_REQ_CMP_ERR); 960 } 961 962 xpt_sim = (struct cam_sim *)arg; 963 xpt_sim->softc = periph; 964 xpt_periph = periph; 965 periph->softc = NULL; 966 967 return(CAM_REQ_CMP); 968 } 969 970 int32_t 971 xpt_add_periph(struct cam_periph *periph) 972 { 973 struct cam_ed *device; 974 int32_t status; 975 struct periph_list *periph_head; 976 977 mtx_assert(periph->sim->mtx, MA_OWNED); 978 979 device = periph->path->device; 980 981 periph_head = &device->periphs; 982 983 status = CAM_REQ_CMP; 984 985 if (device != NULL) { 986 /* 987 * Make room for this peripheral 988 * so it will fit in the queue 989 * when it's scheduled to run 990 */ 991 status = camq_resize(&device->drvq, 992 device->drvq.array_size + 1); 993 994 device->generation++; 995 996 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 997 } 998 999 mtx_lock(&xsoftc.xpt_topo_lock); 1000 xsoftc.xpt_generation++; 1001 mtx_unlock(&xsoftc.xpt_topo_lock); 1002 1003 return (status); 1004 } 1005 1006 void 1007 xpt_remove_periph(struct cam_periph *periph) 1008 { 1009 struct cam_ed *device; 1010 1011 mtx_assert(periph->sim->mtx, MA_OWNED); 1012 1013 device = periph->path->device; 1014 1015 if (device != NULL) { 1016 struct periph_list *periph_head; 1017 1018 periph_head = &device->periphs; 1019 1020 /* Release the slot for this peripheral */ 1021 camq_resize(&device->drvq, device->drvq.array_size - 1); 1022 1023 device->generation++; 1024 1025 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1026 } 1027 1028 mtx_lock(&xsoftc.xpt_topo_lock); 1029 xsoftc.xpt_generation++; 1030 mtx_unlock(&xsoftc.xpt_topo_lock); 1031 } 1032 1033 1034 void 1035 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1036 { 1037 struct cam_path *path = periph->path; 1038 1039 mtx_assert(periph->sim->mtx, MA_OWNED); 1040 1041 printf("%s%d at %s%d bus %d scbus%d target %d lun %d\n", 1042 periph->periph_name, periph->unit_number, 1043 path->bus->sim->sim_name, 1044 path->bus->sim->unit_number, 1045 path->bus->sim->bus_id, 1046 path->bus->path_id, 1047 path->target->target_id, 1048 path->device->lun_id); 1049 printf("%s%d: ", periph->periph_name, periph->unit_number); 1050 if (path->device->protocol == PROTO_SCSI) 1051 scsi_print_inquiry(&path->device->inq_data); 1052 else if (path->device->protocol == PROTO_ATA || 1053 path->device->protocol == PROTO_SATAPM) 1054 ata_print_ident(&path->device->ident_data); 1055 else 1056 printf("Unknown protocol device\n"); 1057 if (bootverbose && path->device->serial_num_len > 0) { 1058 /* Don't wrap the screen - print only the first 60 chars */ 1059 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1060 periph->unit_number, path->device->serial_num); 1061 } 1062 /* Announce transport details. */ 1063 (*(path->bus->xport->announce))(periph); 1064 /* Announce command queueing. */ 1065 if (path->device->inq_flags & SID_CmdQue 1066 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1067 printf("%s%d: Command Queueing enabled\n", 1068 periph->periph_name, periph->unit_number); 1069 } 1070 /* Announce caller's details if they've passed in. */ 1071 if (announce_string != NULL) 1072 printf("%s%d: %s\n", periph->periph_name, 1073 periph->unit_number, announce_string); 1074 } 1075 1076 static dev_match_ret 1077 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1078 struct cam_eb *bus) 1079 { 1080 dev_match_ret retval; 1081 int i; 1082 1083 retval = DM_RET_NONE; 1084 1085 /* 1086 * If we aren't given something to match against, that's an error. 1087 */ 1088 if (bus == NULL) 1089 return(DM_RET_ERROR); 1090 1091 /* 1092 * If there are no match entries, then this bus matches no 1093 * matter what. 1094 */ 1095 if ((patterns == NULL) || (num_patterns == 0)) 1096 return(DM_RET_DESCEND | DM_RET_COPY); 1097 1098 for (i = 0; i < num_patterns; i++) { 1099 struct bus_match_pattern *cur_pattern; 1100 1101 /* 1102 * If the pattern in question isn't for a bus node, we 1103 * aren't interested. However, we do indicate to the 1104 * calling routine that we should continue descending the 1105 * tree, since the user wants to match against lower-level 1106 * EDT elements. 1107 */ 1108 if (patterns[i].type != DEV_MATCH_BUS) { 1109 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1110 retval |= DM_RET_DESCEND; 1111 continue; 1112 } 1113 1114 cur_pattern = &patterns[i].pattern.bus_pattern; 1115 1116 /* 1117 * If they want to match any bus node, we give them any 1118 * device node. 1119 */ 1120 if (cur_pattern->flags == BUS_MATCH_ANY) { 1121 /* set the copy flag */ 1122 retval |= DM_RET_COPY; 1123 1124 /* 1125 * If we've already decided on an action, go ahead 1126 * and return. 1127 */ 1128 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1129 return(retval); 1130 } 1131 1132 /* 1133 * Not sure why someone would do this... 1134 */ 1135 if (cur_pattern->flags == BUS_MATCH_NONE) 1136 continue; 1137 1138 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1139 && (cur_pattern->path_id != bus->path_id)) 1140 continue; 1141 1142 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1143 && (cur_pattern->bus_id != bus->sim->bus_id)) 1144 continue; 1145 1146 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1147 && (cur_pattern->unit_number != bus->sim->unit_number)) 1148 continue; 1149 1150 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1151 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1152 DEV_IDLEN) != 0)) 1153 continue; 1154 1155 /* 1156 * If we get to this point, the user definitely wants 1157 * information on this bus. So tell the caller to copy the 1158 * data out. 1159 */ 1160 retval |= DM_RET_COPY; 1161 1162 /* 1163 * If the return action has been set to descend, then we 1164 * know that we've already seen a non-bus matching 1165 * expression, therefore we need to further descend the tree. 1166 * This won't change by continuing around the loop, so we 1167 * go ahead and return. If we haven't seen a non-bus 1168 * matching expression, we keep going around the loop until 1169 * we exhaust the matching expressions. We'll set the stop 1170 * flag once we fall out of the loop. 1171 */ 1172 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1173 return(retval); 1174 } 1175 1176 /* 1177 * If the return action hasn't been set to descend yet, that means 1178 * we haven't seen anything other than bus matching patterns. So 1179 * tell the caller to stop descending the tree -- the user doesn't 1180 * want to match against lower level tree elements. 1181 */ 1182 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1183 retval |= DM_RET_STOP; 1184 1185 return(retval); 1186 } 1187 1188 static dev_match_ret 1189 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1190 struct cam_ed *device) 1191 { 1192 dev_match_ret retval; 1193 int i; 1194 1195 retval = DM_RET_NONE; 1196 1197 /* 1198 * If we aren't given something to match against, that's an error. 1199 */ 1200 if (device == NULL) 1201 return(DM_RET_ERROR); 1202 1203 /* 1204 * If there are no match entries, then this device matches no 1205 * matter what. 1206 */ 1207 if ((patterns == NULL) || (num_patterns == 0)) 1208 return(DM_RET_DESCEND | DM_RET_COPY); 1209 1210 for (i = 0; i < num_patterns; i++) { 1211 struct device_match_pattern *cur_pattern; 1212 1213 /* 1214 * If the pattern in question isn't for a device node, we 1215 * aren't interested. 1216 */ 1217 if (patterns[i].type != DEV_MATCH_DEVICE) { 1218 if ((patterns[i].type == DEV_MATCH_PERIPH) 1219 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1220 retval |= DM_RET_DESCEND; 1221 continue; 1222 } 1223 1224 cur_pattern = &patterns[i].pattern.device_pattern; 1225 1226 /* 1227 * If they want to match any device node, we give them any 1228 * device node. 1229 */ 1230 if (cur_pattern->flags == DEV_MATCH_ANY) { 1231 /* set the copy flag */ 1232 retval |= DM_RET_COPY; 1233 1234 1235 /* 1236 * If we've already decided on an action, go ahead 1237 * and return. 1238 */ 1239 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1240 return(retval); 1241 } 1242 1243 /* 1244 * Not sure why someone would do this... 1245 */ 1246 if (cur_pattern->flags == DEV_MATCH_NONE) 1247 continue; 1248 1249 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1250 && (cur_pattern->path_id != device->target->bus->path_id)) 1251 continue; 1252 1253 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1254 && (cur_pattern->target_id != device->target->target_id)) 1255 continue; 1256 1257 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1258 && (cur_pattern->target_lun != device->lun_id)) 1259 continue; 1260 1261 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1262 && (cam_quirkmatch((caddr_t)&device->inq_data, 1263 (caddr_t)&cur_pattern->inq_pat, 1264 1, sizeof(cur_pattern->inq_pat), 1265 scsi_static_inquiry_match) == NULL)) 1266 continue; 1267 1268 /* 1269 * If we get to this point, the user definitely wants 1270 * information on this device. So tell the caller to copy 1271 * the 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 peripheral 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 peripheral 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 any peripheral matching patterns. So tell the 1292 * caller to stop descending the tree -- the user doesn't want to 1293 * 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 1301 /* 1302 * Match a single peripheral against any number of match patterns. 1303 */ 1304 static dev_match_ret 1305 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1306 struct cam_periph *periph) 1307 { 1308 dev_match_ret retval; 1309 int i; 1310 1311 /* 1312 * If we aren't given something to match against, that's an error. 1313 */ 1314 if (periph == NULL) 1315 return(DM_RET_ERROR); 1316 1317 /* 1318 * If there are no match entries, then this peripheral matches no 1319 * matter what. 1320 */ 1321 if ((patterns == NULL) || (num_patterns == 0)) 1322 return(DM_RET_STOP | DM_RET_COPY); 1323 1324 /* 1325 * There aren't any nodes below a peripheral node, so there's no 1326 * reason to descend the tree any further. 1327 */ 1328 retval = DM_RET_STOP; 1329 1330 for (i = 0; i < num_patterns; i++) { 1331 struct periph_match_pattern *cur_pattern; 1332 1333 /* 1334 * If the pattern in question isn't for a peripheral, we 1335 * aren't interested. 1336 */ 1337 if (patterns[i].type != DEV_MATCH_PERIPH) 1338 continue; 1339 1340 cur_pattern = &patterns[i].pattern.periph_pattern; 1341 1342 /* 1343 * If they want to match on anything, then we will do so. 1344 */ 1345 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1346 /* set the copy flag */ 1347 retval |= DM_RET_COPY; 1348 1349 /* 1350 * We've already set the return action to stop, 1351 * since there are no nodes below peripherals in 1352 * the tree. 1353 */ 1354 return(retval); 1355 } 1356 1357 /* 1358 * Not sure why someone would do this... 1359 */ 1360 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1361 continue; 1362 1363 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1364 && (cur_pattern->path_id != periph->path->bus->path_id)) 1365 continue; 1366 1367 /* 1368 * For the target and lun id's, we have to make sure the 1369 * target and lun pointers aren't NULL. The xpt peripheral 1370 * has a wildcard target and device. 1371 */ 1372 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1373 && ((periph->path->target == NULL) 1374 ||(cur_pattern->target_id != periph->path->target->target_id))) 1375 continue; 1376 1377 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1378 && ((periph->path->device == NULL) 1379 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1380 continue; 1381 1382 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1383 && (cur_pattern->unit_number != periph->unit_number)) 1384 continue; 1385 1386 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1387 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1388 DEV_IDLEN) != 0)) 1389 continue; 1390 1391 /* 1392 * If we get to this point, the user definitely wants 1393 * information on this peripheral. So tell the caller to 1394 * copy the data out. 1395 */ 1396 retval |= DM_RET_COPY; 1397 1398 /* 1399 * The return action has already been set to stop, since 1400 * peripherals don't have any nodes below them in the EDT. 1401 */ 1402 return(retval); 1403 } 1404 1405 /* 1406 * If we get to this point, the peripheral that was passed in 1407 * doesn't match any of the patterns. 1408 */ 1409 return(retval); 1410 } 1411 1412 static int 1413 xptedtbusfunc(struct cam_eb *bus, void *arg) 1414 { 1415 struct ccb_dev_match *cdm; 1416 dev_match_ret retval; 1417 1418 cdm = (struct ccb_dev_match *)arg; 1419 1420 /* 1421 * If our position is for something deeper in the tree, that means 1422 * that we've already seen this node. So, we keep going down. 1423 */ 1424 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1425 && (cdm->pos.cookie.bus == bus) 1426 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1427 && (cdm->pos.cookie.target != NULL)) 1428 retval = DM_RET_DESCEND; 1429 else 1430 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1431 1432 /* 1433 * If we got an error, bail out of the search. 1434 */ 1435 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1436 cdm->status = CAM_DEV_MATCH_ERROR; 1437 return(0); 1438 } 1439 1440 /* 1441 * If the copy flag is set, copy this bus out. 1442 */ 1443 if (retval & DM_RET_COPY) { 1444 int spaceleft, j; 1445 1446 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1447 sizeof(struct dev_match_result)); 1448 1449 /* 1450 * If we don't have enough space to put in another 1451 * match result, save our position and tell the 1452 * user there are more devices to check. 1453 */ 1454 if (spaceleft < sizeof(struct dev_match_result)) { 1455 bzero(&cdm->pos, sizeof(cdm->pos)); 1456 cdm->pos.position_type = 1457 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1458 1459 cdm->pos.cookie.bus = bus; 1460 cdm->pos.generations[CAM_BUS_GENERATION]= 1461 xsoftc.bus_generation; 1462 cdm->status = CAM_DEV_MATCH_MORE; 1463 return(0); 1464 } 1465 j = cdm->num_matches; 1466 cdm->num_matches++; 1467 cdm->matches[j].type = DEV_MATCH_BUS; 1468 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1469 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1470 cdm->matches[j].result.bus_result.unit_number = 1471 bus->sim->unit_number; 1472 strncpy(cdm->matches[j].result.bus_result.dev_name, 1473 bus->sim->sim_name, DEV_IDLEN); 1474 } 1475 1476 /* 1477 * If the user is only interested in busses, there's no 1478 * reason to descend to the next level in the tree. 1479 */ 1480 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1481 return(1); 1482 1483 /* 1484 * If there is a target generation recorded, check it to 1485 * make sure the target list hasn't changed. 1486 */ 1487 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1488 && (bus == cdm->pos.cookie.bus) 1489 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1490 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1491 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1492 bus->generation)) { 1493 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1494 return(0); 1495 } 1496 1497 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1498 && (cdm->pos.cookie.bus == bus) 1499 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1500 && (cdm->pos.cookie.target != NULL)) 1501 return(xpttargettraverse(bus, 1502 (struct cam_et *)cdm->pos.cookie.target, 1503 xptedttargetfunc, arg)); 1504 else 1505 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1506 } 1507 1508 static int 1509 xptedttargetfunc(struct cam_et *target, void *arg) 1510 { 1511 struct ccb_dev_match *cdm; 1512 1513 cdm = (struct ccb_dev_match *)arg; 1514 1515 /* 1516 * If there is a device list generation recorded, check it to 1517 * make sure the device list hasn't changed. 1518 */ 1519 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1520 && (cdm->pos.cookie.bus == target->bus) 1521 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1522 && (cdm->pos.cookie.target == target) 1523 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1524 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1525 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1526 target->generation)) { 1527 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1528 return(0); 1529 } 1530 1531 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1532 && (cdm->pos.cookie.bus == target->bus) 1533 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1534 && (cdm->pos.cookie.target == target) 1535 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1536 && (cdm->pos.cookie.device != NULL)) 1537 return(xptdevicetraverse(target, 1538 (struct cam_ed *)cdm->pos.cookie.device, 1539 xptedtdevicefunc, arg)); 1540 else 1541 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 1542 } 1543 1544 static int 1545 xptedtdevicefunc(struct cam_ed *device, void *arg) 1546 { 1547 1548 struct ccb_dev_match *cdm; 1549 dev_match_ret retval; 1550 1551 cdm = (struct ccb_dev_match *)arg; 1552 1553 /* 1554 * If our position is for something deeper in the tree, that means 1555 * that we've already seen this node. So, we keep going down. 1556 */ 1557 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1558 && (cdm->pos.cookie.device == device) 1559 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1560 && (cdm->pos.cookie.periph != NULL)) 1561 retval = DM_RET_DESCEND; 1562 else 1563 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1564 device); 1565 1566 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1567 cdm->status = CAM_DEV_MATCH_ERROR; 1568 return(0); 1569 } 1570 1571 /* 1572 * If the copy flag is set, copy this device out. 1573 */ 1574 if (retval & DM_RET_COPY) { 1575 int spaceleft, j; 1576 1577 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1578 sizeof(struct dev_match_result)); 1579 1580 /* 1581 * If we don't have enough space to put in another 1582 * match result, save our position and tell the 1583 * user there are more devices to check. 1584 */ 1585 if (spaceleft < sizeof(struct dev_match_result)) { 1586 bzero(&cdm->pos, sizeof(cdm->pos)); 1587 cdm->pos.position_type = 1588 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1589 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1590 1591 cdm->pos.cookie.bus = device->target->bus; 1592 cdm->pos.generations[CAM_BUS_GENERATION]= 1593 xsoftc.bus_generation; 1594 cdm->pos.cookie.target = device->target; 1595 cdm->pos.generations[CAM_TARGET_GENERATION] = 1596 device->target->bus->generation; 1597 cdm->pos.cookie.device = device; 1598 cdm->pos.generations[CAM_DEV_GENERATION] = 1599 device->target->generation; 1600 cdm->status = CAM_DEV_MATCH_MORE; 1601 return(0); 1602 } 1603 j = cdm->num_matches; 1604 cdm->num_matches++; 1605 cdm->matches[j].type = DEV_MATCH_DEVICE; 1606 cdm->matches[j].result.device_result.path_id = 1607 device->target->bus->path_id; 1608 cdm->matches[j].result.device_result.target_id = 1609 device->target->target_id; 1610 cdm->matches[j].result.device_result.target_lun = 1611 device->lun_id; 1612 cdm->matches[j].result.device_result.protocol = 1613 device->protocol; 1614 bcopy(&device->inq_data, 1615 &cdm->matches[j].result.device_result.inq_data, 1616 sizeof(struct scsi_inquiry_data)); 1617 bcopy(&device->ident_data, 1618 &cdm->matches[j].result.device_result.ident_data, 1619 sizeof(struct ata_params)); 1620 1621 /* Let the user know whether this device is unconfigured */ 1622 if (device->flags & CAM_DEV_UNCONFIGURED) 1623 cdm->matches[j].result.device_result.flags = 1624 DEV_RESULT_UNCONFIGURED; 1625 else 1626 cdm->matches[j].result.device_result.flags = 1627 DEV_RESULT_NOFLAG; 1628 } 1629 1630 /* 1631 * If the user isn't interested in peripherals, don't descend 1632 * the tree any further. 1633 */ 1634 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1635 return(1); 1636 1637 /* 1638 * If there is a peripheral list generation recorded, make sure 1639 * it hasn't changed. 1640 */ 1641 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1642 && (device->target->bus == cdm->pos.cookie.bus) 1643 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1644 && (device->target == cdm->pos.cookie.target) 1645 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1646 && (device == cdm->pos.cookie.device) 1647 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1648 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1649 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1650 device->generation)){ 1651 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1652 return(0); 1653 } 1654 1655 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1656 && (cdm->pos.cookie.bus == device->target->bus) 1657 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1658 && (cdm->pos.cookie.target == device->target) 1659 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1660 && (cdm->pos.cookie.device == device) 1661 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1662 && (cdm->pos.cookie.periph != NULL)) 1663 return(xptperiphtraverse(device, 1664 (struct cam_periph *)cdm->pos.cookie.periph, 1665 xptedtperiphfunc, arg)); 1666 else 1667 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 1668 } 1669 1670 static int 1671 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1672 { 1673 struct ccb_dev_match *cdm; 1674 dev_match_ret retval; 1675 1676 cdm = (struct ccb_dev_match *)arg; 1677 1678 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1679 1680 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1681 cdm->status = CAM_DEV_MATCH_ERROR; 1682 return(0); 1683 } 1684 1685 /* 1686 * If the copy flag is set, copy this peripheral out. 1687 */ 1688 if (retval & DM_RET_COPY) { 1689 int spaceleft, j; 1690 1691 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1692 sizeof(struct dev_match_result)); 1693 1694 /* 1695 * If we don't have enough space to put in another 1696 * match result, save our position and tell the 1697 * user there are more devices to check. 1698 */ 1699 if (spaceleft < sizeof(struct dev_match_result)) { 1700 bzero(&cdm->pos, sizeof(cdm->pos)); 1701 cdm->pos.position_type = 1702 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1703 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1704 CAM_DEV_POS_PERIPH; 1705 1706 cdm->pos.cookie.bus = periph->path->bus; 1707 cdm->pos.generations[CAM_BUS_GENERATION]= 1708 xsoftc.bus_generation; 1709 cdm->pos.cookie.target = periph->path->target; 1710 cdm->pos.generations[CAM_TARGET_GENERATION] = 1711 periph->path->bus->generation; 1712 cdm->pos.cookie.device = periph->path->device; 1713 cdm->pos.generations[CAM_DEV_GENERATION] = 1714 periph->path->target->generation; 1715 cdm->pos.cookie.periph = periph; 1716 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1717 periph->path->device->generation; 1718 cdm->status = CAM_DEV_MATCH_MORE; 1719 return(0); 1720 } 1721 1722 j = cdm->num_matches; 1723 cdm->num_matches++; 1724 cdm->matches[j].type = DEV_MATCH_PERIPH; 1725 cdm->matches[j].result.periph_result.path_id = 1726 periph->path->bus->path_id; 1727 cdm->matches[j].result.periph_result.target_id = 1728 periph->path->target->target_id; 1729 cdm->matches[j].result.periph_result.target_lun = 1730 periph->path->device->lun_id; 1731 cdm->matches[j].result.periph_result.unit_number = 1732 periph->unit_number; 1733 strncpy(cdm->matches[j].result.periph_result.periph_name, 1734 periph->periph_name, DEV_IDLEN); 1735 } 1736 1737 return(1); 1738 } 1739 1740 static int 1741 xptedtmatch(struct ccb_dev_match *cdm) 1742 { 1743 int ret; 1744 1745 cdm->num_matches = 0; 1746 1747 /* 1748 * Check the bus list generation. If it has changed, the user 1749 * needs to reset everything and start over. 1750 */ 1751 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1752 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 1753 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 1754 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1755 return(0); 1756 } 1757 1758 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1759 && (cdm->pos.cookie.bus != NULL)) 1760 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 1761 xptedtbusfunc, cdm); 1762 else 1763 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 1764 1765 /* 1766 * If we get back 0, that means that we had to stop before fully 1767 * traversing the EDT. It also means that one of the subroutines 1768 * has set the status field to the proper value. If we get back 1, 1769 * we've fully traversed the EDT and copied out any matching entries. 1770 */ 1771 if (ret == 1) 1772 cdm->status = CAM_DEV_MATCH_LAST; 1773 1774 return(ret); 1775 } 1776 1777 static int 1778 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1779 { 1780 struct ccb_dev_match *cdm; 1781 1782 cdm = (struct ccb_dev_match *)arg; 1783 1784 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1785 && (cdm->pos.cookie.pdrv == pdrv) 1786 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1787 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1788 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1789 (*pdrv)->generation)) { 1790 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1791 return(0); 1792 } 1793 1794 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1795 && (cdm->pos.cookie.pdrv == pdrv) 1796 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1797 && (cdm->pos.cookie.periph != NULL)) 1798 return(xptpdperiphtraverse(pdrv, 1799 (struct cam_periph *)cdm->pos.cookie.periph, 1800 xptplistperiphfunc, arg)); 1801 else 1802 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 1803 } 1804 1805 static int 1806 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1807 { 1808 struct ccb_dev_match *cdm; 1809 dev_match_ret retval; 1810 1811 cdm = (struct ccb_dev_match *)arg; 1812 1813 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1814 1815 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1816 cdm->status = CAM_DEV_MATCH_ERROR; 1817 return(0); 1818 } 1819 1820 /* 1821 * If the copy flag is set, copy this peripheral out. 1822 */ 1823 if (retval & DM_RET_COPY) { 1824 int spaceleft, j; 1825 1826 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1827 sizeof(struct dev_match_result)); 1828 1829 /* 1830 * If we don't have enough space to put in another 1831 * match result, save our position and tell the 1832 * user there are more devices to check. 1833 */ 1834 if (spaceleft < sizeof(struct dev_match_result)) { 1835 struct periph_driver **pdrv; 1836 1837 pdrv = NULL; 1838 bzero(&cdm->pos, sizeof(cdm->pos)); 1839 cdm->pos.position_type = 1840 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1841 CAM_DEV_POS_PERIPH; 1842 1843 /* 1844 * This may look a bit non-sensical, but it is 1845 * actually quite logical. There are very few 1846 * peripheral drivers, and bloating every peripheral 1847 * structure with a pointer back to its parent 1848 * peripheral driver linker set entry would cost 1849 * more in the long run than doing this quick lookup. 1850 */ 1851 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 1852 if (strcmp((*pdrv)->driver_name, 1853 periph->periph_name) == 0) 1854 break; 1855 } 1856 1857 if (*pdrv == NULL) { 1858 cdm->status = CAM_DEV_MATCH_ERROR; 1859 return(0); 1860 } 1861 1862 cdm->pos.cookie.pdrv = pdrv; 1863 /* 1864 * The periph generation slot does double duty, as 1865 * does the periph pointer slot. They are used for 1866 * both edt and pdrv lookups and positioning. 1867 */ 1868 cdm->pos.cookie.periph = periph; 1869 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1870 (*pdrv)->generation; 1871 cdm->status = CAM_DEV_MATCH_MORE; 1872 return(0); 1873 } 1874 1875 j = cdm->num_matches; 1876 cdm->num_matches++; 1877 cdm->matches[j].type = DEV_MATCH_PERIPH; 1878 cdm->matches[j].result.periph_result.path_id = 1879 periph->path->bus->path_id; 1880 1881 /* 1882 * The transport layer peripheral doesn't have a target or 1883 * lun. 1884 */ 1885 if (periph->path->target) 1886 cdm->matches[j].result.periph_result.target_id = 1887 periph->path->target->target_id; 1888 else 1889 cdm->matches[j].result.periph_result.target_id = -1; 1890 1891 if (periph->path->device) 1892 cdm->matches[j].result.periph_result.target_lun = 1893 periph->path->device->lun_id; 1894 else 1895 cdm->matches[j].result.periph_result.target_lun = -1; 1896 1897 cdm->matches[j].result.periph_result.unit_number = 1898 periph->unit_number; 1899 strncpy(cdm->matches[j].result.periph_result.periph_name, 1900 periph->periph_name, DEV_IDLEN); 1901 } 1902 1903 return(1); 1904 } 1905 1906 static int 1907 xptperiphlistmatch(struct ccb_dev_match *cdm) 1908 { 1909 int ret; 1910 1911 cdm->num_matches = 0; 1912 1913 /* 1914 * At this point in the edt traversal function, we check the bus 1915 * list generation to make sure that no busses have been added or 1916 * removed since the user last sent a XPT_DEV_MATCH ccb through. 1917 * For the peripheral driver list traversal function, however, we 1918 * don't have to worry about new peripheral driver types coming or 1919 * going; they're in a linker set, and therefore can't change 1920 * without a recompile. 1921 */ 1922 1923 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1924 && (cdm->pos.cookie.pdrv != NULL)) 1925 ret = xptpdrvtraverse( 1926 (struct periph_driver **)cdm->pos.cookie.pdrv, 1927 xptplistpdrvfunc, cdm); 1928 else 1929 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 1930 1931 /* 1932 * If we get back 0, that means that we had to stop before fully 1933 * traversing the peripheral driver tree. It also means that one of 1934 * the subroutines has set the status field to the proper value. If 1935 * we get back 1, we've fully traversed the EDT and copied out any 1936 * matching entries. 1937 */ 1938 if (ret == 1) 1939 cdm->status = CAM_DEV_MATCH_LAST; 1940 1941 return(ret); 1942 } 1943 1944 static int 1945 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 1946 { 1947 struct cam_eb *bus, *next_bus; 1948 int retval; 1949 1950 retval = 1; 1951 1952 mtx_lock(&xsoftc.xpt_topo_lock); 1953 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 1954 bus != NULL; 1955 bus = next_bus) { 1956 next_bus = TAILQ_NEXT(bus, links); 1957 1958 mtx_unlock(&xsoftc.xpt_topo_lock); 1959 CAM_SIM_LOCK(bus->sim); 1960 retval = tr_func(bus, arg); 1961 CAM_SIM_UNLOCK(bus->sim); 1962 if (retval == 0) 1963 return(retval); 1964 mtx_lock(&xsoftc.xpt_topo_lock); 1965 } 1966 mtx_unlock(&xsoftc.xpt_topo_lock); 1967 1968 return(retval); 1969 } 1970 1971 int 1972 xpt_sim_opened(struct cam_sim *sim) 1973 { 1974 struct cam_eb *bus; 1975 struct cam_et *target; 1976 struct cam_ed *device; 1977 struct cam_periph *periph; 1978 1979 KASSERT(sim->refcount >= 1, ("sim->refcount >= 1")); 1980 mtx_assert(sim->mtx, MA_OWNED); 1981 1982 mtx_lock(&xsoftc.xpt_topo_lock); 1983 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 1984 if (bus->sim != sim) 1985 continue; 1986 1987 TAILQ_FOREACH(target, &bus->et_entries, links) { 1988 TAILQ_FOREACH(device, &target->ed_entries, links) { 1989 SLIST_FOREACH(periph, &device->periphs, 1990 periph_links) { 1991 if (periph->refcount > 0) { 1992 mtx_unlock(&xsoftc.xpt_topo_lock); 1993 return (1); 1994 } 1995 } 1996 } 1997 } 1998 } 1999 2000 mtx_unlock(&xsoftc.xpt_topo_lock); 2001 return (0); 2002 } 2003 2004 static int 2005 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2006 xpt_targetfunc_t *tr_func, void *arg) 2007 { 2008 struct cam_et *target, *next_target; 2009 int retval; 2010 2011 retval = 1; 2012 for (target = (start_target ? start_target : 2013 TAILQ_FIRST(&bus->et_entries)); 2014 target != NULL; target = next_target) { 2015 2016 next_target = TAILQ_NEXT(target, links); 2017 2018 retval = tr_func(target, arg); 2019 2020 if (retval == 0) 2021 return(retval); 2022 } 2023 2024 return(retval); 2025 } 2026 2027 static int 2028 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2029 xpt_devicefunc_t *tr_func, void *arg) 2030 { 2031 struct cam_ed *device, *next_device; 2032 int retval; 2033 2034 retval = 1; 2035 for (device = (start_device ? start_device : 2036 TAILQ_FIRST(&target->ed_entries)); 2037 device != NULL; 2038 device = next_device) { 2039 2040 next_device = TAILQ_NEXT(device, links); 2041 2042 retval = tr_func(device, arg); 2043 2044 if (retval == 0) 2045 return(retval); 2046 } 2047 2048 return(retval); 2049 } 2050 2051 static int 2052 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2053 xpt_periphfunc_t *tr_func, void *arg) 2054 { 2055 struct cam_periph *periph, *next_periph; 2056 int retval; 2057 2058 retval = 1; 2059 2060 for (periph = (start_periph ? start_periph : 2061 SLIST_FIRST(&device->periphs)); 2062 periph != NULL; 2063 periph = next_periph) { 2064 2065 next_periph = SLIST_NEXT(periph, periph_links); 2066 2067 retval = tr_func(periph, arg); 2068 if (retval == 0) 2069 return(retval); 2070 } 2071 2072 return(retval); 2073 } 2074 2075 static int 2076 xptpdrvtraverse(struct periph_driver **start_pdrv, 2077 xpt_pdrvfunc_t *tr_func, void *arg) 2078 { 2079 struct periph_driver **pdrv; 2080 int retval; 2081 2082 retval = 1; 2083 2084 /* 2085 * We don't traverse the peripheral driver list like we do the 2086 * other lists, because it is a linker set, and therefore cannot be 2087 * changed during runtime. If the peripheral driver list is ever 2088 * re-done to be something other than a linker set (i.e. it can 2089 * change while the system is running), the list traversal should 2090 * be modified to work like the other traversal functions. 2091 */ 2092 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2093 *pdrv != NULL; pdrv++) { 2094 retval = tr_func(pdrv, arg); 2095 2096 if (retval == 0) 2097 return(retval); 2098 } 2099 2100 return(retval); 2101 } 2102 2103 static int 2104 xptpdperiphtraverse(struct periph_driver **pdrv, 2105 struct cam_periph *start_periph, 2106 xpt_periphfunc_t *tr_func, void *arg) 2107 { 2108 struct cam_periph *periph, *next_periph; 2109 int retval; 2110 2111 retval = 1; 2112 2113 for (periph = (start_periph ? start_periph : 2114 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2115 periph = next_periph) { 2116 2117 next_periph = TAILQ_NEXT(periph, unit_links); 2118 2119 retval = tr_func(periph, arg); 2120 if (retval == 0) 2121 return(retval); 2122 } 2123 return(retval); 2124 } 2125 2126 static int 2127 xptdefbusfunc(struct cam_eb *bus, void *arg) 2128 { 2129 struct xpt_traverse_config *tr_config; 2130 2131 tr_config = (struct xpt_traverse_config *)arg; 2132 2133 if (tr_config->depth == XPT_DEPTH_BUS) { 2134 xpt_busfunc_t *tr_func; 2135 2136 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2137 2138 return(tr_func(bus, tr_config->tr_arg)); 2139 } else 2140 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2141 } 2142 2143 static int 2144 xptdeftargetfunc(struct cam_et *target, void *arg) 2145 { 2146 struct xpt_traverse_config *tr_config; 2147 2148 tr_config = (struct xpt_traverse_config *)arg; 2149 2150 if (tr_config->depth == XPT_DEPTH_TARGET) { 2151 xpt_targetfunc_t *tr_func; 2152 2153 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2154 2155 return(tr_func(target, tr_config->tr_arg)); 2156 } else 2157 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2158 } 2159 2160 static int 2161 xptdefdevicefunc(struct cam_ed *device, void *arg) 2162 { 2163 struct xpt_traverse_config *tr_config; 2164 2165 tr_config = (struct xpt_traverse_config *)arg; 2166 2167 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2168 xpt_devicefunc_t *tr_func; 2169 2170 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2171 2172 return(tr_func(device, tr_config->tr_arg)); 2173 } else 2174 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2175 } 2176 2177 static int 2178 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2179 { 2180 struct xpt_traverse_config *tr_config; 2181 xpt_periphfunc_t *tr_func; 2182 2183 tr_config = (struct xpt_traverse_config *)arg; 2184 2185 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2186 2187 /* 2188 * Unlike the other default functions, we don't check for depth 2189 * here. The peripheral driver level is the last level in the EDT, 2190 * so if we're here, we should execute the function in question. 2191 */ 2192 return(tr_func(periph, tr_config->tr_arg)); 2193 } 2194 2195 /* 2196 * Execute the given function for every bus in the EDT. 2197 */ 2198 static int 2199 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2200 { 2201 struct xpt_traverse_config tr_config; 2202 2203 tr_config.depth = XPT_DEPTH_BUS; 2204 tr_config.tr_func = tr_func; 2205 tr_config.tr_arg = arg; 2206 2207 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2208 } 2209 2210 /* 2211 * Execute the given function for every device in the EDT. 2212 */ 2213 static int 2214 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2215 { 2216 struct xpt_traverse_config tr_config; 2217 2218 tr_config.depth = XPT_DEPTH_DEVICE; 2219 tr_config.tr_func = tr_func; 2220 tr_config.tr_arg = arg; 2221 2222 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2223 } 2224 2225 static int 2226 xptsetasyncfunc(struct cam_ed *device, void *arg) 2227 { 2228 struct cam_path path; 2229 struct ccb_getdev cgd; 2230 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2231 2232 /* 2233 * Don't report unconfigured devices (Wildcard devs, 2234 * devices only for target mode, device instances 2235 * that have been invalidated but are waiting for 2236 * their last reference count to be released). 2237 */ 2238 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2239 return (1); 2240 2241 xpt_compile_path(&path, 2242 NULL, 2243 device->target->bus->path_id, 2244 device->target->target_id, 2245 device->lun_id); 2246 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2247 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2248 xpt_action((union ccb *)&cgd); 2249 csa->callback(csa->callback_arg, 2250 AC_FOUND_DEVICE, 2251 &path, &cgd); 2252 xpt_release_path(&path); 2253 2254 return(1); 2255 } 2256 2257 static int 2258 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2259 { 2260 struct cam_path path; 2261 struct ccb_pathinq cpi; 2262 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2263 2264 xpt_compile_path(&path, /*periph*/NULL, 2265 bus->sim->path_id, 2266 CAM_TARGET_WILDCARD, 2267 CAM_LUN_WILDCARD); 2268 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2269 cpi.ccb_h.func_code = XPT_PATH_INQ; 2270 xpt_action((union ccb *)&cpi); 2271 csa->callback(csa->callback_arg, 2272 AC_PATH_REGISTERED, 2273 &path, &cpi); 2274 xpt_release_path(&path); 2275 2276 return(1); 2277 } 2278 2279 void 2280 xpt_action(union ccb *start_ccb) 2281 { 2282 2283 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2284 2285 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2286 /* Compatibility for RL-unaware code. */ 2287 if (CAM_PRIORITY_TO_RL(start_ccb->ccb_h.pinfo.priority) == 0) 2288 start_ccb->ccb_h.pinfo.priority += CAM_PRIORITY_NORMAL - 1; 2289 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2290 } 2291 2292 void 2293 xpt_action_default(union ccb *start_ccb) 2294 { 2295 2296 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2297 2298 2299 switch (start_ccb->ccb_h.func_code) { 2300 case XPT_SCSI_IO: 2301 { 2302 struct cam_ed *device; 2303 #ifdef CAMDEBUG 2304 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2305 struct cam_path *path; 2306 2307 path = start_ccb->ccb_h.path; 2308 #endif 2309 2310 /* 2311 * For the sake of compatibility with SCSI-1 2312 * devices that may not understand the identify 2313 * message, we include lun information in the 2314 * second byte of all commands. SCSI-1 specifies 2315 * that luns are a 3 bit value and reserves only 3 2316 * bits for lun information in the CDB. Later 2317 * revisions of the SCSI spec allow for more than 8 2318 * luns, but have deprecated lun information in the 2319 * CDB. So, if the lun won't fit, we must omit. 2320 * 2321 * Also be aware that during initial probing for devices, 2322 * the inquiry information is unknown but initialized to 0. 2323 * This means that this code will be exercised while probing 2324 * devices with an ANSI revision greater than 2. 2325 */ 2326 device = start_ccb->ccb_h.path->device; 2327 if (device->protocol_version <= SCSI_REV_2 2328 && start_ccb->ccb_h.target_lun < 8 2329 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2330 2331 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2332 start_ccb->ccb_h.target_lun << 5; 2333 } 2334 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2335 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2336 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2337 &path->device->inq_data), 2338 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2339 cdb_str, sizeof(cdb_str)))); 2340 } 2341 /* FALLTHROUGH */ 2342 case XPT_TARGET_IO: 2343 case XPT_CONT_TARGET_IO: 2344 start_ccb->csio.sense_resid = 0; 2345 start_ccb->csio.resid = 0; 2346 /* FALLTHROUGH */ 2347 case XPT_ATA_IO: 2348 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) { 2349 start_ccb->ataio.resid = 0; 2350 } 2351 /* FALLTHROUGH */ 2352 case XPT_RESET_DEV: 2353 case XPT_ENG_EXEC: 2354 { 2355 struct cam_path *path = start_ccb->ccb_h.path; 2356 int frozen; 2357 2358 frozen = cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2359 path->device->sim->devq->alloc_openings += frozen; 2360 if (frozen > 0) 2361 xpt_run_dev_allocq(path->bus); 2362 if (xpt_schedule_dev_sendq(path->bus, path->device)) 2363 xpt_run_dev_sendq(path->bus); 2364 break; 2365 } 2366 case XPT_CALC_GEOMETRY: 2367 { 2368 struct cam_sim *sim; 2369 2370 /* Filter out garbage */ 2371 if (start_ccb->ccg.block_size == 0 2372 || start_ccb->ccg.volume_size == 0) { 2373 start_ccb->ccg.cylinders = 0; 2374 start_ccb->ccg.heads = 0; 2375 start_ccb->ccg.secs_per_track = 0; 2376 start_ccb->ccb_h.status = CAM_REQ_CMP; 2377 break; 2378 } 2379 #ifdef PC98 2380 /* 2381 * In a PC-98 system, geometry translation depens on 2382 * the "real" device geometry obtained from mode page 4. 2383 * SCSI geometry translation is performed in the 2384 * initialization routine of the SCSI BIOS and the result 2385 * stored in host memory. If the translation is available 2386 * in host memory, use it. If not, rely on the default 2387 * translation the device driver performs. 2388 */ 2389 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2390 start_ccb->ccb_h.status = CAM_REQ_CMP; 2391 break; 2392 } 2393 #endif 2394 sim = start_ccb->ccb_h.path->bus->sim; 2395 (*(sim->sim_action))(sim, start_ccb); 2396 break; 2397 } 2398 case XPT_ABORT: 2399 { 2400 union ccb* abort_ccb; 2401 2402 abort_ccb = start_ccb->cab.abort_ccb; 2403 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2404 2405 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2406 struct cam_ccbq *ccbq; 2407 struct cam_ed *device; 2408 2409 device = abort_ccb->ccb_h.path->device; 2410 ccbq = &device->ccbq; 2411 device->sim->devq->alloc_openings -= 2412 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2413 abort_ccb->ccb_h.status = 2414 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2415 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2416 xpt_done(abort_ccb); 2417 start_ccb->ccb_h.status = CAM_REQ_CMP; 2418 break; 2419 } 2420 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2421 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2422 /* 2423 * We've caught this ccb en route to 2424 * the SIM. Flag it for abort and the 2425 * SIM will do so just before starting 2426 * real work on the CCB. 2427 */ 2428 abort_ccb->ccb_h.status = 2429 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2430 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2431 start_ccb->ccb_h.status = CAM_REQ_CMP; 2432 break; 2433 } 2434 } 2435 if (XPT_FC_IS_QUEUED(abort_ccb) 2436 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2437 /* 2438 * It's already completed but waiting 2439 * for our SWI to get to it. 2440 */ 2441 start_ccb->ccb_h.status = CAM_UA_ABORT; 2442 break; 2443 } 2444 /* 2445 * If we weren't able to take care of the abort request 2446 * in the XPT, pass the request down to the SIM for processing. 2447 */ 2448 } 2449 /* FALLTHROUGH */ 2450 case XPT_ACCEPT_TARGET_IO: 2451 case XPT_EN_LUN: 2452 case XPT_IMMED_NOTIFY: 2453 case XPT_NOTIFY_ACK: 2454 case XPT_RESET_BUS: 2455 case XPT_IMMEDIATE_NOTIFY: 2456 case XPT_NOTIFY_ACKNOWLEDGE: 2457 case XPT_GET_SIM_KNOB: 2458 case XPT_SET_SIM_KNOB: 2459 { 2460 struct cam_sim *sim; 2461 2462 sim = start_ccb->ccb_h.path->bus->sim; 2463 (*(sim->sim_action))(sim, start_ccb); 2464 break; 2465 } 2466 case XPT_PATH_INQ: 2467 { 2468 struct cam_sim *sim; 2469 2470 sim = start_ccb->ccb_h.path->bus->sim; 2471 (*(sim->sim_action))(sim, start_ccb); 2472 break; 2473 } 2474 case XPT_PATH_STATS: 2475 start_ccb->cpis.last_reset = 2476 start_ccb->ccb_h.path->bus->last_reset; 2477 start_ccb->ccb_h.status = CAM_REQ_CMP; 2478 break; 2479 case XPT_GDEV_TYPE: 2480 { 2481 struct cam_ed *dev; 2482 2483 dev = start_ccb->ccb_h.path->device; 2484 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2485 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2486 } else { 2487 struct ccb_getdev *cgd; 2488 struct cam_eb *bus; 2489 struct cam_et *tar; 2490 2491 cgd = &start_ccb->cgd; 2492 bus = cgd->ccb_h.path->bus; 2493 tar = cgd->ccb_h.path->target; 2494 cgd->protocol = dev->protocol; 2495 cgd->inq_data = dev->inq_data; 2496 cgd->ident_data = dev->ident_data; 2497 cgd->inq_flags = dev->inq_flags; 2498 cgd->ccb_h.status = CAM_REQ_CMP; 2499 cgd->serial_num_len = dev->serial_num_len; 2500 if ((dev->serial_num_len > 0) 2501 && (dev->serial_num != NULL)) 2502 bcopy(dev->serial_num, cgd->serial_num, 2503 dev->serial_num_len); 2504 } 2505 break; 2506 } 2507 case XPT_GDEV_STATS: 2508 { 2509 struct cam_ed *dev; 2510 2511 dev = start_ccb->ccb_h.path->device; 2512 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2513 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2514 } else { 2515 struct ccb_getdevstats *cgds; 2516 struct cam_eb *bus; 2517 struct cam_et *tar; 2518 2519 cgds = &start_ccb->cgds; 2520 bus = cgds->ccb_h.path->bus; 2521 tar = cgds->ccb_h.path->target; 2522 cgds->dev_openings = dev->ccbq.dev_openings; 2523 cgds->dev_active = dev->ccbq.dev_active; 2524 cgds->devq_openings = dev->ccbq.devq_openings; 2525 cgds->devq_queued = dev->ccbq.queue.entries; 2526 cgds->held = dev->ccbq.held; 2527 cgds->last_reset = tar->last_reset; 2528 cgds->maxtags = dev->maxtags; 2529 cgds->mintags = dev->mintags; 2530 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2531 cgds->last_reset = bus->last_reset; 2532 cgds->ccb_h.status = CAM_REQ_CMP; 2533 } 2534 break; 2535 } 2536 case XPT_GDEVLIST: 2537 { 2538 struct cam_periph *nperiph; 2539 struct periph_list *periph_head; 2540 struct ccb_getdevlist *cgdl; 2541 u_int i; 2542 struct cam_ed *device; 2543 int found; 2544 2545 2546 found = 0; 2547 2548 /* 2549 * Don't want anyone mucking with our data. 2550 */ 2551 device = start_ccb->ccb_h.path->device; 2552 periph_head = &device->periphs; 2553 cgdl = &start_ccb->cgdl; 2554 2555 /* 2556 * Check and see if the list has changed since the user 2557 * last requested a list member. If so, tell them that the 2558 * list has changed, and therefore they need to start over 2559 * from the beginning. 2560 */ 2561 if ((cgdl->index != 0) && 2562 (cgdl->generation != device->generation)) { 2563 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2564 break; 2565 } 2566 2567 /* 2568 * Traverse the list of peripherals and attempt to find 2569 * the requested peripheral. 2570 */ 2571 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2572 (nperiph != NULL) && (i <= cgdl->index); 2573 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2574 if (i == cgdl->index) { 2575 strncpy(cgdl->periph_name, 2576 nperiph->periph_name, 2577 DEV_IDLEN); 2578 cgdl->unit_number = nperiph->unit_number; 2579 found = 1; 2580 } 2581 } 2582 if (found == 0) { 2583 cgdl->status = CAM_GDEVLIST_ERROR; 2584 break; 2585 } 2586 2587 if (nperiph == NULL) 2588 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2589 else 2590 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2591 2592 cgdl->index++; 2593 cgdl->generation = device->generation; 2594 2595 cgdl->ccb_h.status = CAM_REQ_CMP; 2596 break; 2597 } 2598 case XPT_DEV_MATCH: 2599 { 2600 dev_pos_type position_type; 2601 struct ccb_dev_match *cdm; 2602 2603 cdm = &start_ccb->cdm; 2604 2605 /* 2606 * There are two ways of getting at information in the EDT. 2607 * The first way is via the primary EDT tree. It starts 2608 * with a list of busses, then a list of targets on a bus, 2609 * then devices/luns on a target, and then peripherals on a 2610 * device/lun. The "other" way is by the peripheral driver 2611 * lists. The peripheral driver lists are organized by 2612 * peripheral driver. (obviously) So it makes sense to 2613 * use the peripheral driver list if the user is looking 2614 * for something like "da1", or all "da" devices. If the 2615 * user is looking for something on a particular bus/target 2616 * or lun, it's generally better to go through the EDT tree. 2617 */ 2618 2619 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2620 position_type = cdm->pos.position_type; 2621 else { 2622 u_int i; 2623 2624 position_type = CAM_DEV_POS_NONE; 2625 2626 for (i = 0; i < cdm->num_patterns; i++) { 2627 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2628 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2629 position_type = CAM_DEV_POS_EDT; 2630 break; 2631 } 2632 } 2633 2634 if (cdm->num_patterns == 0) 2635 position_type = CAM_DEV_POS_EDT; 2636 else if (position_type == CAM_DEV_POS_NONE) 2637 position_type = CAM_DEV_POS_PDRV; 2638 } 2639 2640 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2641 case CAM_DEV_POS_EDT: 2642 xptedtmatch(cdm); 2643 break; 2644 case CAM_DEV_POS_PDRV: 2645 xptperiphlistmatch(cdm); 2646 break; 2647 default: 2648 cdm->status = CAM_DEV_MATCH_ERROR; 2649 break; 2650 } 2651 2652 if (cdm->status == CAM_DEV_MATCH_ERROR) 2653 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2654 else 2655 start_ccb->ccb_h.status = CAM_REQ_CMP; 2656 2657 break; 2658 } 2659 case XPT_SASYNC_CB: 2660 { 2661 struct ccb_setasync *csa; 2662 struct async_node *cur_entry; 2663 struct async_list *async_head; 2664 u_int32_t added; 2665 2666 csa = &start_ccb->csa; 2667 added = csa->event_enable; 2668 async_head = &csa->ccb_h.path->device->asyncs; 2669 2670 /* 2671 * If there is already an entry for us, simply 2672 * update it. 2673 */ 2674 cur_entry = SLIST_FIRST(async_head); 2675 while (cur_entry != NULL) { 2676 if ((cur_entry->callback_arg == csa->callback_arg) 2677 && (cur_entry->callback == csa->callback)) 2678 break; 2679 cur_entry = SLIST_NEXT(cur_entry, links); 2680 } 2681 2682 if (cur_entry != NULL) { 2683 /* 2684 * If the request has no flags set, 2685 * remove the entry. 2686 */ 2687 added &= ~cur_entry->event_enable; 2688 if (csa->event_enable == 0) { 2689 SLIST_REMOVE(async_head, cur_entry, 2690 async_node, links); 2691 xpt_release_device(csa->ccb_h.path->device); 2692 free(cur_entry, M_CAMXPT); 2693 } else { 2694 cur_entry->event_enable = csa->event_enable; 2695 } 2696 csa->event_enable = added; 2697 } else { 2698 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2699 M_NOWAIT); 2700 if (cur_entry == NULL) { 2701 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2702 break; 2703 } 2704 cur_entry->event_enable = csa->event_enable; 2705 cur_entry->callback_arg = csa->callback_arg; 2706 cur_entry->callback = csa->callback; 2707 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2708 xpt_acquire_device(csa->ccb_h.path->device); 2709 } 2710 start_ccb->ccb_h.status = CAM_REQ_CMP; 2711 break; 2712 } 2713 case XPT_REL_SIMQ: 2714 { 2715 struct ccb_relsim *crs; 2716 struct cam_ed *dev; 2717 2718 crs = &start_ccb->crs; 2719 dev = crs->ccb_h.path->device; 2720 if (dev == NULL) { 2721 2722 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2723 break; 2724 } 2725 2726 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2727 2728 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 2729 /* Don't ever go below one opening */ 2730 if (crs->openings > 0) { 2731 xpt_dev_ccbq_resize(crs->ccb_h.path, 2732 crs->openings); 2733 2734 if (bootverbose) { 2735 xpt_print(crs->ccb_h.path, 2736 "tagged openings now %d\n", 2737 crs->openings); 2738 } 2739 } 2740 } 2741 } 2742 2743 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2744 2745 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2746 2747 /* 2748 * Just extend the old timeout and decrement 2749 * the freeze count so that a single timeout 2750 * is sufficient for releasing the queue. 2751 */ 2752 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2753 callout_stop(&dev->callout); 2754 } else { 2755 2756 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2757 } 2758 2759 callout_reset(&dev->callout, 2760 (crs->release_timeout * hz) / 1000, 2761 xpt_release_devq_timeout, dev); 2762 2763 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2764 2765 } 2766 2767 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2768 2769 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2770 /* 2771 * Decrement the freeze count so that a single 2772 * completion is still sufficient to unfreeze 2773 * the queue. 2774 */ 2775 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2776 } else { 2777 2778 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2779 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2780 } 2781 } 2782 2783 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2784 2785 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2786 || (dev->ccbq.dev_active == 0)) { 2787 2788 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2789 } else { 2790 2791 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2792 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2793 } 2794 } 2795 2796 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 2797 xpt_release_devq_rl(crs->ccb_h.path, /*runlevel*/ 2798 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2799 crs->release_timeout : 0, 2800 /*count*/1, /*run_queue*/TRUE); 2801 } 2802 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt[0]; 2803 start_ccb->ccb_h.status = CAM_REQ_CMP; 2804 break; 2805 } 2806 case XPT_DEBUG: { 2807 #ifdef CAMDEBUG 2808 #ifdef CAM_DEBUG_DELAY 2809 cam_debug_delay = CAM_DEBUG_DELAY; 2810 #endif 2811 cam_dflags = start_ccb->cdbg.flags; 2812 if (cam_dpath != NULL) { 2813 xpt_free_path(cam_dpath); 2814 cam_dpath = NULL; 2815 } 2816 2817 if (cam_dflags != CAM_DEBUG_NONE) { 2818 if (xpt_create_path(&cam_dpath, xpt_periph, 2819 start_ccb->ccb_h.path_id, 2820 start_ccb->ccb_h.target_id, 2821 start_ccb->ccb_h.target_lun) != 2822 CAM_REQ_CMP) { 2823 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2824 cam_dflags = CAM_DEBUG_NONE; 2825 } else { 2826 start_ccb->ccb_h.status = CAM_REQ_CMP; 2827 xpt_print(cam_dpath, "debugging flags now %x\n", 2828 cam_dflags); 2829 } 2830 } else { 2831 cam_dpath = NULL; 2832 start_ccb->ccb_h.status = CAM_REQ_CMP; 2833 } 2834 #else /* !CAMDEBUG */ 2835 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2836 #endif /* CAMDEBUG */ 2837 break; 2838 } 2839 case XPT_FREEZE_QUEUE: 2840 { 2841 struct ccb_relsim *crs = &start_ccb->crs; 2842 2843 xpt_freeze_devq_rl(crs->ccb_h.path, /*runlevel*/ 2844 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2845 crs->release_timeout : 0, /*count*/1); 2846 start_ccb->ccb_h.status = CAM_REQ_CMP; 2847 break; 2848 } 2849 case XPT_NOOP: 2850 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 2851 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 2852 start_ccb->ccb_h.status = CAM_REQ_CMP; 2853 break; 2854 default: 2855 case XPT_SDEV_TYPE: 2856 case XPT_TERM_IO: 2857 case XPT_ENG_INQ: 2858 /* XXX Implement */ 2859 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 2860 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 2861 xpt_done(start_ccb); 2862 } 2863 break; 2864 } 2865 } 2866 2867 void 2868 xpt_polled_action(union ccb *start_ccb) 2869 { 2870 u_int32_t timeout; 2871 struct cam_sim *sim; 2872 struct cam_devq *devq; 2873 struct cam_ed *dev; 2874 2875 2876 timeout = start_ccb->ccb_h.timeout; 2877 sim = start_ccb->ccb_h.path->bus->sim; 2878 devq = sim->devq; 2879 dev = start_ccb->ccb_h.path->device; 2880 2881 mtx_assert(sim->mtx, MA_OWNED); 2882 2883 /* 2884 * Steal an opening so that no other queued requests 2885 * can get it before us while we simulate interrupts. 2886 */ 2887 dev->ccbq.devq_openings--; 2888 dev->ccbq.dev_openings--; 2889 2890 while(((devq != NULL && devq->send_openings <= 0) || 2891 dev->ccbq.dev_openings < 0) && (--timeout > 0)) { 2892 DELAY(1000); 2893 (*(sim->sim_poll))(sim); 2894 camisr_runqueue(&sim->sim_doneq); 2895 } 2896 2897 dev->ccbq.devq_openings++; 2898 dev->ccbq.dev_openings++; 2899 2900 if (timeout != 0) { 2901 xpt_action(start_ccb); 2902 while(--timeout > 0) { 2903 (*(sim->sim_poll))(sim); 2904 camisr_runqueue(&sim->sim_doneq); 2905 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 2906 != CAM_REQ_INPROG) 2907 break; 2908 DELAY(1000); 2909 } 2910 if (timeout == 0) { 2911 /* 2912 * XXX Is it worth adding a sim_timeout entry 2913 * point so we can attempt recovery? If 2914 * this is only used for dumps, I don't think 2915 * it is. 2916 */ 2917 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 2918 } 2919 } else { 2920 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2921 } 2922 } 2923 2924 /* 2925 * Schedule a peripheral driver to receive a ccb when it's 2926 * target device has space for more transactions. 2927 */ 2928 void 2929 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 2930 { 2931 struct cam_ed *device; 2932 int runq = 0; 2933 2934 mtx_assert(perph->sim->mtx, MA_OWNED); 2935 2936 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 2937 device = perph->path->device; 2938 if (periph_is_queued(perph)) { 2939 /* Simply reorder based on new priority */ 2940 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 2941 (" change priority to %d\n", new_priority)); 2942 if (new_priority < perph->pinfo.priority) { 2943 camq_change_priority(&device->drvq, 2944 perph->pinfo.index, 2945 new_priority); 2946 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 2947 } 2948 } else { 2949 /* New entry on the queue */ 2950 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 2951 (" added periph to queue\n")); 2952 perph->pinfo.priority = new_priority; 2953 perph->pinfo.generation = ++device->drvq.generation; 2954 camq_insert(&device->drvq, &perph->pinfo); 2955 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 2956 } 2957 if (runq != 0) { 2958 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 2959 (" calling xpt_run_devq\n")); 2960 xpt_run_dev_allocq(perph->path->bus); 2961 } 2962 } 2963 2964 2965 /* 2966 * Schedule a device to run on a given queue. 2967 * If the device was inserted as a new entry on the queue, 2968 * return 1 meaning the device queue should be run. If we 2969 * were already queued, implying someone else has already 2970 * started the queue, return 0 so the caller doesn't attempt 2971 * to run the queue. 2972 */ 2973 int 2974 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 2975 u_int32_t new_priority) 2976 { 2977 int retval; 2978 u_int32_t old_priority; 2979 2980 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 2981 2982 old_priority = pinfo->priority; 2983 2984 /* 2985 * Are we already queued? 2986 */ 2987 if (pinfo->index != CAM_UNQUEUED_INDEX) { 2988 /* Simply reorder based on new priority */ 2989 if (new_priority < old_priority) { 2990 camq_change_priority(queue, pinfo->index, 2991 new_priority); 2992 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 2993 ("changed priority to %d\n", 2994 new_priority)); 2995 retval = 1; 2996 } else 2997 retval = 0; 2998 } else { 2999 /* New entry on the queue */ 3000 if (new_priority < old_priority) 3001 pinfo->priority = new_priority; 3002 3003 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3004 ("Inserting onto queue\n")); 3005 pinfo->generation = ++queue->generation; 3006 camq_insert(queue, pinfo); 3007 retval = 1; 3008 } 3009 return (retval); 3010 } 3011 3012 static void 3013 xpt_run_dev_allocq(struct cam_eb *bus) 3014 { 3015 struct cam_devq *devq; 3016 3017 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3018 devq = bus->sim->devq; 3019 3020 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3021 (" qfrozen_cnt == 0x%x, entries == %d, " 3022 "openings == %d, active == %d\n", 3023 devq->alloc_queue.qfrozen_cnt[0], 3024 devq->alloc_queue.entries, 3025 devq->alloc_openings, 3026 devq->alloc_active)); 3027 3028 devq->alloc_queue.qfrozen_cnt[0]++; 3029 while ((devq->alloc_queue.entries > 0) 3030 && (devq->alloc_openings > 0) 3031 && (devq->alloc_queue.qfrozen_cnt[0] <= 1)) { 3032 struct cam_ed_qinfo *qinfo; 3033 struct cam_ed *device; 3034 union ccb *work_ccb; 3035 struct cam_periph *drv; 3036 struct camq *drvq; 3037 3038 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3039 CAMQ_HEAD); 3040 device = qinfo->device; 3041 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3042 ("running device %p\n", device)); 3043 3044 drvq = &device->drvq; 3045 3046 #ifdef CAMDEBUG 3047 if (drvq->entries <= 0) { 3048 panic("xpt_run_dev_allocq: " 3049 "Device on queue without any work to do"); 3050 } 3051 #endif 3052 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3053 devq->alloc_openings--; 3054 devq->alloc_active++; 3055 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3056 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3057 drv->pinfo.priority); 3058 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3059 ("calling periph start\n")); 3060 drv->periph_start(drv, work_ccb); 3061 } else { 3062 /* 3063 * Malloc failure in alloc_ccb 3064 */ 3065 /* 3066 * XXX add us to a list to be run from free_ccb 3067 * if we don't have any ccbs active on this 3068 * device queue otherwise we may never get run 3069 * again. 3070 */ 3071 break; 3072 } 3073 3074 /* We may have more work. Attempt to reschedule. */ 3075 xpt_schedule_dev_allocq(bus, device); 3076 } 3077 devq->alloc_queue.qfrozen_cnt[0]--; 3078 } 3079 3080 static void 3081 xpt_run_dev_sendq(struct cam_eb *bus) 3082 { 3083 struct cam_devq *devq; 3084 3085 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3086 3087 devq = bus->sim->devq; 3088 3089 devq->send_queue.qfrozen_cnt[0]++; 3090 while ((devq->send_queue.entries > 0) 3091 && (devq->send_openings > 0) 3092 && (devq->send_queue.qfrozen_cnt[0] <= 1)) { 3093 struct cam_ed_qinfo *qinfo; 3094 struct cam_ed *device; 3095 union ccb *work_ccb; 3096 struct cam_sim *sim; 3097 3098 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3099 CAMQ_HEAD); 3100 device = qinfo->device; 3101 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3102 ("running device %p\n", device)); 3103 3104 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3105 if (work_ccb == NULL) { 3106 printf("device on run queue with no ccbs???\n"); 3107 continue; 3108 } 3109 3110 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3111 3112 mtx_lock(&xsoftc.xpt_lock); 3113 if (xsoftc.num_highpower <= 0) { 3114 /* 3115 * We got a high power command, but we 3116 * don't have any available slots. Freeze 3117 * the device queue until we have a slot 3118 * available. 3119 */ 3120 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3121 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3122 &work_ccb->ccb_h, 3123 xpt_links.stqe); 3124 3125 mtx_unlock(&xsoftc.xpt_lock); 3126 continue; 3127 } else { 3128 /* 3129 * Consume a high power slot while 3130 * this ccb runs. 3131 */ 3132 xsoftc.num_highpower--; 3133 } 3134 mtx_unlock(&xsoftc.xpt_lock); 3135 } 3136 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3137 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3138 3139 devq->send_openings--; 3140 devq->send_active++; 3141 3142 xpt_schedule_dev_sendq(bus, device); 3143 3144 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3145 /* 3146 * The client wants to freeze the queue 3147 * after this CCB is sent. 3148 */ 3149 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3150 } 3151 3152 /* In Target mode, the peripheral driver knows best... */ 3153 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3154 if ((device->inq_flags & SID_CmdQue) != 0 3155 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3156 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3157 else 3158 /* 3159 * Clear this in case of a retried CCB that 3160 * failed due to a rejected tag. 3161 */ 3162 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3163 } 3164 3165 /* 3166 * Device queues can be shared among multiple sim instances 3167 * that reside on different busses. Use the SIM in the queue 3168 * CCB's path, rather than the one in the bus that was passed 3169 * into this function. 3170 */ 3171 sim = work_ccb->ccb_h.path->bus->sim; 3172 (*(sim->sim_action))(sim, work_ccb); 3173 } 3174 devq->send_queue.qfrozen_cnt[0]--; 3175 } 3176 3177 /* 3178 * This function merges stuff from the slave ccb into the master ccb, while 3179 * keeping important fields in the master ccb constant. 3180 */ 3181 void 3182 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3183 { 3184 3185 /* 3186 * Pull fields that are valid for peripheral drivers to set 3187 * into the master CCB along with the CCB "payload". 3188 */ 3189 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3190 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3191 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3192 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3193 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3194 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3195 } 3196 3197 void 3198 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3199 { 3200 3201 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3202 ccb_h->pinfo.priority = priority; 3203 ccb_h->path = path; 3204 ccb_h->path_id = path->bus->path_id; 3205 if (path->target) 3206 ccb_h->target_id = path->target->target_id; 3207 else 3208 ccb_h->target_id = CAM_TARGET_WILDCARD; 3209 if (path->device) { 3210 ccb_h->target_lun = path->device->lun_id; 3211 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3212 } else { 3213 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3214 } 3215 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3216 ccb_h->flags = 0; 3217 } 3218 3219 /* Path manipulation functions */ 3220 cam_status 3221 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3222 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3223 { 3224 struct cam_path *path; 3225 cam_status status; 3226 3227 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3228 3229 if (path == NULL) { 3230 status = CAM_RESRC_UNAVAIL; 3231 return(status); 3232 } 3233 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3234 if (status != CAM_REQ_CMP) { 3235 free(path, M_CAMXPT); 3236 path = NULL; 3237 } 3238 *new_path_ptr = path; 3239 return (status); 3240 } 3241 3242 cam_status 3243 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3244 struct cam_periph *periph, path_id_t path_id, 3245 target_id_t target_id, lun_id_t lun_id) 3246 { 3247 struct cam_path *path; 3248 struct cam_eb *bus = NULL; 3249 cam_status status; 3250 int need_unlock = 0; 3251 3252 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3253 3254 if (path_id != CAM_BUS_WILDCARD) { 3255 bus = xpt_find_bus(path_id); 3256 if (bus != NULL) { 3257 need_unlock = 1; 3258 CAM_SIM_LOCK(bus->sim); 3259 } 3260 } 3261 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3262 if (need_unlock) 3263 CAM_SIM_UNLOCK(bus->sim); 3264 if (status != CAM_REQ_CMP) { 3265 free(path, M_CAMXPT); 3266 path = NULL; 3267 } 3268 *new_path_ptr = path; 3269 return (status); 3270 } 3271 3272 cam_status 3273 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3274 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3275 { 3276 struct cam_eb *bus; 3277 struct cam_et *target; 3278 struct cam_ed *device; 3279 cam_status status; 3280 3281 status = CAM_REQ_CMP; /* Completed without error */ 3282 target = NULL; /* Wildcarded */ 3283 device = NULL; /* Wildcarded */ 3284 3285 /* 3286 * We will potentially modify the EDT, so block interrupts 3287 * that may attempt to create cam paths. 3288 */ 3289 bus = xpt_find_bus(path_id); 3290 if (bus == NULL) { 3291 status = CAM_PATH_INVALID; 3292 } else { 3293 target = xpt_find_target(bus, target_id); 3294 if (target == NULL) { 3295 /* Create one */ 3296 struct cam_et *new_target; 3297 3298 new_target = xpt_alloc_target(bus, target_id); 3299 if (new_target == NULL) { 3300 status = CAM_RESRC_UNAVAIL; 3301 } else { 3302 target = new_target; 3303 } 3304 } 3305 if (target != NULL) { 3306 device = xpt_find_device(target, lun_id); 3307 if (device == NULL) { 3308 /* Create one */ 3309 struct cam_ed *new_device; 3310 3311 new_device = 3312 (*(bus->xport->alloc_device))(bus, 3313 target, 3314 lun_id); 3315 if (new_device == NULL) { 3316 status = CAM_RESRC_UNAVAIL; 3317 } else { 3318 device = new_device; 3319 } 3320 } 3321 } 3322 } 3323 3324 /* 3325 * Only touch the user's data if we are successful. 3326 */ 3327 if (status == CAM_REQ_CMP) { 3328 new_path->periph = perph; 3329 new_path->bus = bus; 3330 new_path->target = target; 3331 new_path->device = device; 3332 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3333 } else { 3334 if (device != NULL) 3335 xpt_release_device(device); 3336 if (target != NULL) 3337 xpt_release_target(target); 3338 if (bus != NULL) 3339 xpt_release_bus(bus); 3340 } 3341 return (status); 3342 } 3343 3344 void 3345 xpt_release_path(struct cam_path *path) 3346 { 3347 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3348 if (path->device != NULL) { 3349 xpt_release_device(path->device); 3350 path->device = NULL; 3351 } 3352 if (path->target != NULL) { 3353 xpt_release_target(path->target); 3354 path->target = NULL; 3355 } 3356 if (path->bus != NULL) { 3357 xpt_release_bus(path->bus); 3358 path->bus = NULL; 3359 } 3360 } 3361 3362 void 3363 xpt_free_path(struct cam_path *path) 3364 { 3365 3366 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3367 xpt_release_path(path); 3368 free(path, M_CAMXPT); 3369 } 3370 3371 3372 /* 3373 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3374 * in path1, 2 for match with wildcards in path2. 3375 */ 3376 int 3377 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3378 { 3379 int retval = 0; 3380 3381 if (path1->bus != path2->bus) { 3382 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3383 retval = 1; 3384 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3385 retval = 2; 3386 else 3387 return (-1); 3388 } 3389 if (path1->target != path2->target) { 3390 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3391 if (retval == 0) 3392 retval = 1; 3393 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3394 retval = 2; 3395 else 3396 return (-1); 3397 } 3398 if (path1->device != path2->device) { 3399 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3400 if (retval == 0) 3401 retval = 1; 3402 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3403 retval = 2; 3404 else 3405 return (-1); 3406 } 3407 return (retval); 3408 } 3409 3410 void 3411 xpt_print_path(struct cam_path *path) 3412 { 3413 3414 if (path == NULL) 3415 printf("(nopath): "); 3416 else { 3417 if (path->periph != NULL) 3418 printf("(%s%d:", path->periph->periph_name, 3419 path->periph->unit_number); 3420 else 3421 printf("(noperiph:"); 3422 3423 if (path->bus != NULL) 3424 printf("%s%d:%d:", path->bus->sim->sim_name, 3425 path->bus->sim->unit_number, 3426 path->bus->sim->bus_id); 3427 else 3428 printf("nobus:"); 3429 3430 if (path->target != NULL) 3431 printf("%d:", path->target->target_id); 3432 else 3433 printf("X:"); 3434 3435 if (path->device != NULL) 3436 printf("%d): ", path->device->lun_id); 3437 else 3438 printf("X): "); 3439 } 3440 } 3441 3442 void 3443 xpt_print(struct cam_path *path, const char *fmt, ...) 3444 { 3445 va_list ap; 3446 xpt_print_path(path); 3447 va_start(ap, fmt); 3448 vprintf(fmt, ap); 3449 va_end(ap); 3450 } 3451 3452 int 3453 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3454 { 3455 struct sbuf sb; 3456 3457 #ifdef INVARIANTS 3458 if (path != NULL && path->bus != NULL) 3459 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3460 #endif 3461 3462 sbuf_new(&sb, str, str_len, 0); 3463 3464 if (path == NULL) 3465 sbuf_printf(&sb, "(nopath): "); 3466 else { 3467 if (path->periph != NULL) 3468 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3469 path->periph->unit_number); 3470 else 3471 sbuf_printf(&sb, "(noperiph:"); 3472 3473 if (path->bus != NULL) 3474 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3475 path->bus->sim->unit_number, 3476 path->bus->sim->bus_id); 3477 else 3478 sbuf_printf(&sb, "nobus:"); 3479 3480 if (path->target != NULL) 3481 sbuf_printf(&sb, "%d:", path->target->target_id); 3482 else 3483 sbuf_printf(&sb, "X:"); 3484 3485 if (path->device != NULL) 3486 sbuf_printf(&sb, "%d): ", path->device->lun_id); 3487 else 3488 sbuf_printf(&sb, "X): "); 3489 } 3490 sbuf_finish(&sb); 3491 3492 return(sbuf_len(&sb)); 3493 } 3494 3495 path_id_t 3496 xpt_path_path_id(struct cam_path *path) 3497 { 3498 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3499 3500 return(path->bus->path_id); 3501 } 3502 3503 target_id_t 3504 xpt_path_target_id(struct cam_path *path) 3505 { 3506 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3507 3508 if (path->target != NULL) 3509 return (path->target->target_id); 3510 else 3511 return (CAM_TARGET_WILDCARD); 3512 } 3513 3514 lun_id_t 3515 xpt_path_lun_id(struct cam_path *path) 3516 { 3517 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3518 3519 if (path->device != NULL) 3520 return (path->device->lun_id); 3521 else 3522 return (CAM_LUN_WILDCARD); 3523 } 3524 3525 struct cam_sim * 3526 xpt_path_sim(struct cam_path *path) 3527 { 3528 3529 return (path->bus->sim); 3530 } 3531 3532 struct cam_periph* 3533 xpt_path_periph(struct cam_path *path) 3534 { 3535 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3536 3537 return (path->periph); 3538 } 3539 3540 /* 3541 * Release a CAM control block for the caller. Remit the cost of the structure 3542 * to the device referenced by the path. If the this device had no 'credits' 3543 * and peripheral drivers have registered async callbacks for this notification 3544 * call them now. 3545 */ 3546 void 3547 xpt_release_ccb(union ccb *free_ccb) 3548 { 3549 struct cam_path *path; 3550 struct cam_ed *device; 3551 struct cam_eb *bus; 3552 struct cam_sim *sim; 3553 3554 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3555 path = free_ccb->ccb_h.path; 3556 device = path->device; 3557 bus = path->bus; 3558 sim = bus->sim; 3559 3560 mtx_assert(sim->mtx, MA_OWNED); 3561 3562 cam_ccbq_release_opening(&device->ccbq); 3563 if (device->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) { 3564 device->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 3565 cam_ccbq_resize(&device->ccbq, 3566 device->ccbq.dev_openings + device->ccbq.dev_active); 3567 } 3568 if (sim->ccb_count > sim->max_ccbs) { 3569 xpt_free_ccb(free_ccb); 3570 sim->ccb_count--; 3571 } else { 3572 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 3573 xpt_links.sle); 3574 } 3575 if (sim->devq == NULL) { 3576 return; 3577 } 3578 sim->devq->alloc_openings++; 3579 sim->devq->alloc_active--; 3580 if (device_is_alloc_queued(device) == 0) 3581 xpt_schedule_dev_allocq(bus, device); 3582 xpt_run_dev_allocq(bus); 3583 } 3584 3585 /* Functions accessed by SIM drivers */ 3586 3587 static struct xpt_xport xport_default = { 3588 .alloc_device = xpt_alloc_device_default, 3589 .action = xpt_action_default, 3590 .async = xpt_dev_async_default, 3591 }; 3592 3593 /* 3594 * A sim structure, listing the SIM entry points and instance 3595 * identification info is passed to xpt_bus_register to hook the SIM 3596 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3597 * for this new bus and places it in the array of busses and assigns 3598 * it a path_id. The path_id may be influenced by "hard wiring" 3599 * information specified by the user. Once interrupt services are 3600 * available, the bus will be probed. 3601 */ 3602 int32_t 3603 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3604 { 3605 struct cam_eb *new_bus; 3606 struct cam_eb *old_bus; 3607 struct ccb_pathinq cpi; 3608 struct cam_path *path; 3609 cam_status status; 3610 3611 mtx_assert(sim->mtx, MA_OWNED); 3612 3613 sim->bus_id = bus; 3614 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3615 M_CAMXPT, M_NOWAIT); 3616 if (new_bus == NULL) { 3617 /* Couldn't satisfy request */ 3618 return (CAM_RESRC_UNAVAIL); 3619 } 3620 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3621 if (path == NULL) { 3622 free(new_bus, M_CAMXPT); 3623 return (CAM_RESRC_UNAVAIL); 3624 } 3625 3626 if (strcmp(sim->sim_name, "xpt") != 0) { 3627 sim->path_id = 3628 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3629 } 3630 3631 TAILQ_INIT(&new_bus->et_entries); 3632 new_bus->path_id = sim->path_id; 3633 cam_sim_hold(sim); 3634 new_bus->sim = sim; 3635 timevalclear(&new_bus->last_reset); 3636 new_bus->flags = 0; 3637 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3638 new_bus->generation = 0; 3639 3640 mtx_lock(&xsoftc.xpt_topo_lock); 3641 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3642 while (old_bus != NULL 3643 && old_bus->path_id < new_bus->path_id) 3644 old_bus = TAILQ_NEXT(old_bus, links); 3645 if (old_bus != NULL) 3646 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3647 else 3648 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3649 xsoftc.bus_generation++; 3650 mtx_unlock(&xsoftc.xpt_topo_lock); 3651 3652 /* 3653 * Set a default transport so that a PATH_INQ can be issued to 3654 * the SIM. This will then allow for probing and attaching of 3655 * a more appropriate transport. 3656 */ 3657 new_bus->xport = &xport_default; 3658 3659 status = xpt_compile_path(path, /*periph*/NULL, sim->path_id, 3660 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3661 if (status != CAM_REQ_CMP) 3662 printf("xpt_compile_path returned %d\n", status); 3663 3664 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3665 cpi.ccb_h.func_code = XPT_PATH_INQ; 3666 xpt_action((union ccb *)&cpi); 3667 3668 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3669 switch (cpi.transport) { 3670 case XPORT_SPI: 3671 case XPORT_SAS: 3672 case XPORT_FC: 3673 case XPORT_USB: 3674 case XPORT_ISCSI: 3675 case XPORT_PPB: 3676 new_bus->xport = scsi_get_xport(); 3677 break; 3678 case XPORT_ATA: 3679 case XPORT_SATA: 3680 new_bus->xport = ata_get_xport(); 3681 break; 3682 default: 3683 new_bus->xport = &xport_default; 3684 break; 3685 } 3686 } 3687 3688 /* Notify interested parties */ 3689 if (sim->path_id != CAM_XPT_PATH_ID) { 3690 union ccb *scan_ccb; 3691 3692 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3693 /* Initiate bus rescan. */ 3694 scan_ccb = xpt_alloc_ccb_nowait(); 3695 scan_ccb->ccb_h.path = path; 3696 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3697 scan_ccb->crcn.flags = 0; 3698 xpt_rescan(scan_ccb); 3699 } else 3700 xpt_free_path(path); 3701 return (CAM_SUCCESS); 3702 } 3703 3704 int32_t 3705 xpt_bus_deregister(path_id_t pathid) 3706 { 3707 struct cam_path bus_path; 3708 cam_status status; 3709 3710 status = xpt_compile_path(&bus_path, NULL, pathid, 3711 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3712 if (status != CAM_REQ_CMP) 3713 return (status); 3714 3715 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3716 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3717 3718 /* Release the reference count held while registered. */ 3719 xpt_release_bus(bus_path.bus); 3720 xpt_release_path(&bus_path); 3721 3722 return (CAM_REQ_CMP); 3723 } 3724 3725 static path_id_t 3726 xptnextfreepathid(void) 3727 { 3728 struct cam_eb *bus; 3729 path_id_t pathid; 3730 const char *strval; 3731 3732 pathid = 0; 3733 mtx_lock(&xsoftc.xpt_topo_lock); 3734 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3735 retry: 3736 /* Find an unoccupied pathid */ 3737 while (bus != NULL && bus->path_id <= pathid) { 3738 if (bus->path_id == pathid) 3739 pathid++; 3740 bus = TAILQ_NEXT(bus, links); 3741 } 3742 mtx_unlock(&xsoftc.xpt_topo_lock); 3743 3744 /* 3745 * Ensure that this pathid is not reserved for 3746 * a bus that may be registered in the future. 3747 */ 3748 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3749 ++pathid; 3750 /* Start the search over */ 3751 mtx_lock(&xsoftc.xpt_topo_lock); 3752 goto retry; 3753 } 3754 return (pathid); 3755 } 3756 3757 static path_id_t 3758 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3759 { 3760 path_id_t pathid; 3761 int i, dunit, val; 3762 char buf[32]; 3763 const char *dname; 3764 3765 pathid = CAM_XPT_PATH_ID; 3766 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3767 i = 0; 3768 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 3769 if (strcmp(dname, "scbus")) { 3770 /* Avoid a bit of foot shooting. */ 3771 continue; 3772 } 3773 if (dunit < 0) /* unwired?! */ 3774 continue; 3775 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 3776 if (sim_bus == val) { 3777 pathid = dunit; 3778 break; 3779 } 3780 } else if (sim_bus == 0) { 3781 /* Unspecified matches bus 0 */ 3782 pathid = dunit; 3783 break; 3784 } else { 3785 printf("Ambiguous scbus configuration for %s%d " 3786 "bus %d, cannot wire down. The kernel " 3787 "config entry for scbus%d should " 3788 "specify a controller bus.\n" 3789 "Scbus will be assigned dynamically.\n", 3790 sim_name, sim_unit, sim_bus, dunit); 3791 break; 3792 } 3793 } 3794 3795 if (pathid == CAM_XPT_PATH_ID) 3796 pathid = xptnextfreepathid(); 3797 return (pathid); 3798 } 3799 3800 void 3801 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 3802 { 3803 struct cam_eb *bus; 3804 struct cam_et *target, *next_target; 3805 struct cam_ed *device, *next_device; 3806 3807 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3808 3809 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 3810 3811 /* 3812 * Most async events come from a CAM interrupt context. In 3813 * a few cases, the error recovery code at the peripheral layer, 3814 * which may run from our SWI or a process context, may signal 3815 * deferred events with a call to xpt_async. 3816 */ 3817 3818 bus = path->bus; 3819 3820 if (async_code == AC_BUS_RESET) { 3821 /* Update our notion of when the last reset occurred */ 3822 microtime(&bus->last_reset); 3823 } 3824 3825 for (target = TAILQ_FIRST(&bus->et_entries); 3826 target != NULL; 3827 target = next_target) { 3828 3829 next_target = TAILQ_NEXT(target, links); 3830 3831 if (path->target != target 3832 && path->target->target_id != CAM_TARGET_WILDCARD 3833 && target->target_id != CAM_TARGET_WILDCARD) 3834 continue; 3835 3836 if (async_code == AC_SENT_BDR) { 3837 /* Update our notion of when the last reset occurred */ 3838 microtime(&path->target->last_reset); 3839 } 3840 3841 for (device = TAILQ_FIRST(&target->ed_entries); 3842 device != NULL; 3843 device = next_device) { 3844 3845 next_device = TAILQ_NEXT(device, links); 3846 3847 if (path->device != device 3848 && path->device->lun_id != CAM_LUN_WILDCARD 3849 && device->lun_id != CAM_LUN_WILDCARD) 3850 continue; 3851 /* 3852 * The async callback could free the device. 3853 * If it is a broadcast async, it doesn't hold 3854 * device reference, so take our own reference. 3855 */ 3856 xpt_acquire_device(device); 3857 (*(bus->xport->async))(async_code, bus, 3858 target, device, 3859 async_arg); 3860 3861 xpt_async_bcast(&device->asyncs, async_code, 3862 path, async_arg); 3863 xpt_release_device(device); 3864 } 3865 } 3866 3867 /* 3868 * If this wasn't a fully wildcarded async, tell all 3869 * clients that want all async events. 3870 */ 3871 if (bus != xpt_periph->path->bus) 3872 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 3873 path, async_arg); 3874 } 3875 3876 static void 3877 xpt_async_bcast(struct async_list *async_head, 3878 u_int32_t async_code, 3879 struct cam_path *path, void *async_arg) 3880 { 3881 struct async_node *cur_entry; 3882 3883 cur_entry = SLIST_FIRST(async_head); 3884 while (cur_entry != NULL) { 3885 struct async_node *next_entry; 3886 /* 3887 * Grab the next list entry before we call the current 3888 * entry's callback. This is because the callback function 3889 * can delete its async callback entry. 3890 */ 3891 next_entry = SLIST_NEXT(cur_entry, links); 3892 if ((cur_entry->event_enable & async_code) != 0) 3893 cur_entry->callback(cur_entry->callback_arg, 3894 async_code, path, 3895 async_arg); 3896 cur_entry = next_entry; 3897 } 3898 } 3899 3900 static void 3901 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 3902 struct cam_et *target, struct cam_ed *device, 3903 void *async_arg) 3904 { 3905 printf("%s called\n", __func__); 3906 } 3907 3908 u_int32_t 3909 xpt_freeze_devq_rl(struct cam_path *path, cam_rl rl, u_int count) 3910 { 3911 struct cam_ed *dev = path->device; 3912 3913 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3914 dev->sim->devq->alloc_openings += 3915 cam_ccbq_freeze(&dev->ccbq, rl, count); 3916 /* Remove frozen device from allocq. */ 3917 if (device_is_alloc_queued(dev) && 3918 cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 3919 CAMQ_GET_PRIO(&dev->drvq)))) { 3920 camq_remove(&dev->sim->devq->alloc_queue, 3921 dev->alloc_ccb_entry.pinfo.index); 3922 } 3923 /* Remove frozen device from sendq. */ 3924 if (device_is_send_queued(dev) && 3925 cam_ccbq_frozen_top(&dev->ccbq)) { 3926 camq_remove(&dev->sim->devq->send_queue, 3927 dev->send_ccb_entry.pinfo.index); 3928 } 3929 return (dev->ccbq.queue.qfrozen_cnt[rl]); 3930 } 3931 3932 u_int32_t 3933 xpt_freeze_devq(struct cam_path *path, u_int count) 3934 { 3935 3936 return (xpt_freeze_devq_rl(path, 0, count)); 3937 } 3938 3939 u_int32_t 3940 xpt_freeze_simq(struct cam_sim *sim, u_int count) 3941 { 3942 3943 mtx_assert(sim->mtx, MA_OWNED); 3944 sim->devq->send_queue.qfrozen_cnt[0] += count; 3945 return (sim->devq->send_queue.qfrozen_cnt[0]); 3946 } 3947 3948 static void 3949 xpt_release_devq_timeout(void *arg) 3950 { 3951 struct cam_ed *device; 3952 3953 device = (struct cam_ed *)arg; 3954 3955 xpt_release_devq_device(device, /*rl*/0, /*count*/1, /*run_queue*/TRUE); 3956 } 3957 3958 void 3959 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 3960 { 3961 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3962 3963 xpt_release_devq_device(path->device, /*rl*/0, count, run_queue); 3964 } 3965 3966 void 3967 xpt_release_devq_rl(struct cam_path *path, cam_rl rl, u_int count, int run_queue) 3968 { 3969 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3970 3971 xpt_release_devq_device(path->device, rl, count, run_queue); 3972 } 3973 3974 static void 3975 xpt_release_devq_device(struct cam_ed *dev, cam_rl rl, u_int count, int run_queue) 3976 { 3977 3978 if (count > dev->ccbq.queue.qfrozen_cnt[rl]) { 3979 #ifdef INVARIANTS 3980 printf("xpt_release_devq(%d): requested %u > present %u\n", 3981 rl, count, dev->ccbq.queue.qfrozen_cnt[rl]); 3982 #endif 3983 count = dev->ccbq.queue.qfrozen_cnt[rl]; 3984 } 3985 dev->sim->devq->alloc_openings -= 3986 cam_ccbq_release(&dev->ccbq, rl, count); 3987 if (cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 3988 CAMQ_GET_PRIO(&dev->drvq))) == 0) { 3989 if (xpt_schedule_dev_allocq(dev->target->bus, dev)) 3990 xpt_run_dev_allocq(dev->target->bus); 3991 } 3992 if (cam_ccbq_frozen_top(&dev->ccbq) == 0) { 3993 /* 3994 * No longer need to wait for a successful 3995 * command completion. 3996 */ 3997 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 3998 /* 3999 * Remove any timeouts that might be scheduled 4000 * to release this queue. 4001 */ 4002 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4003 callout_stop(&dev->callout); 4004 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4005 } 4006 if (run_queue == 0) 4007 return; 4008 /* 4009 * Now that we are unfrozen schedule the 4010 * device so any pending transactions are 4011 * run. 4012 */ 4013 if (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4014 xpt_run_dev_sendq(dev->target->bus); 4015 } 4016 } 4017 4018 void 4019 xpt_release_simq(struct cam_sim *sim, int run_queue) 4020 { 4021 struct camq *sendq; 4022 4023 mtx_assert(sim->mtx, MA_OWNED); 4024 sendq = &(sim->devq->send_queue); 4025 if (sendq->qfrozen_cnt[0] <= 0) { 4026 #ifdef INVARIANTS 4027 printf("xpt_release_simq: requested 1 > present %u\n", 4028 sendq->qfrozen_cnt[0]); 4029 #endif 4030 } else 4031 sendq->qfrozen_cnt[0]--; 4032 if (sendq->qfrozen_cnt[0] == 0) { 4033 /* 4034 * If there is a timeout scheduled to release this 4035 * sim queue, remove it. The queue frozen count is 4036 * already at 0. 4037 */ 4038 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4039 callout_stop(&sim->callout); 4040 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4041 } 4042 if (run_queue) { 4043 struct cam_eb *bus; 4044 4045 /* 4046 * Now that we are unfrozen run the send queue. 4047 */ 4048 bus = xpt_find_bus(sim->path_id); 4049 xpt_run_dev_sendq(bus); 4050 xpt_release_bus(bus); 4051 } 4052 } 4053 } 4054 4055 /* 4056 * XXX Appears to be unused. 4057 */ 4058 static void 4059 xpt_release_simq_timeout(void *arg) 4060 { 4061 struct cam_sim *sim; 4062 4063 sim = (struct cam_sim *)arg; 4064 xpt_release_simq(sim, /* run_queue */ TRUE); 4065 } 4066 4067 void 4068 xpt_done(union ccb *done_ccb) 4069 { 4070 struct cam_sim *sim; 4071 int first; 4072 4073 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4074 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4075 /* 4076 * Queue up the request for handling by our SWI handler 4077 * any of the "non-immediate" type of ccbs. 4078 */ 4079 sim = done_ccb->ccb_h.path->bus->sim; 4080 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4081 sim_links.tqe); 4082 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4083 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4084 mtx_lock(&cam_simq_lock); 4085 first = TAILQ_EMPTY(&cam_simq); 4086 TAILQ_INSERT_TAIL(&cam_simq, sim, links); 4087 mtx_unlock(&cam_simq_lock); 4088 sim->flags |= CAM_SIM_ON_DONEQ; 4089 if (first) 4090 swi_sched(cambio_ih, 0); 4091 } 4092 } 4093 } 4094 4095 union ccb * 4096 xpt_alloc_ccb() 4097 { 4098 union ccb *new_ccb; 4099 4100 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK); 4101 return (new_ccb); 4102 } 4103 4104 union ccb * 4105 xpt_alloc_ccb_nowait() 4106 { 4107 union ccb *new_ccb; 4108 4109 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT); 4110 return (new_ccb); 4111 } 4112 4113 void 4114 xpt_free_ccb(union ccb *free_ccb) 4115 { 4116 free(free_ccb, M_CAMXPT); 4117 } 4118 4119 4120 4121 /* Private XPT functions */ 4122 4123 /* 4124 * Get a CAM control block for the caller. Charge the structure to the device 4125 * referenced by the path. If the this device has no 'credits' then the 4126 * device already has the maximum number of outstanding operations under way 4127 * and we return NULL. If we don't have sufficient resources to allocate more 4128 * ccbs, we also return NULL. 4129 */ 4130 static union ccb * 4131 xpt_get_ccb(struct cam_ed *device) 4132 { 4133 union ccb *new_ccb; 4134 struct cam_sim *sim; 4135 4136 sim = device->sim; 4137 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4138 new_ccb = xpt_alloc_ccb_nowait(); 4139 if (new_ccb == NULL) { 4140 return (NULL); 4141 } 4142 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4143 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4144 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4145 xpt_links.sle); 4146 sim->ccb_count++; 4147 } 4148 cam_ccbq_take_opening(&device->ccbq); 4149 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4150 return (new_ccb); 4151 } 4152 4153 static void 4154 xpt_release_bus(struct cam_eb *bus) 4155 { 4156 4157 if ((--bus->refcount == 0) 4158 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4159 mtx_lock(&xsoftc.xpt_topo_lock); 4160 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4161 xsoftc.bus_generation++; 4162 mtx_unlock(&xsoftc.xpt_topo_lock); 4163 cam_sim_release(bus->sim); 4164 free(bus, M_CAMXPT); 4165 } 4166 } 4167 4168 static struct cam_et * 4169 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4170 { 4171 struct cam_et *target; 4172 4173 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT); 4174 if (target != NULL) { 4175 struct cam_et *cur_target; 4176 4177 TAILQ_INIT(&target->ed_entries); 4178 target->bus = bus; 4179 target->target_id = target_id; 4180 target->refcount = 1; 4181 target->generation = 0; 4182 timevalclear(&target->last_reset); 4183 /* 4184 * Hold a reference to our parent bus so it 4185 * will not go away before we do. 4186 */ 4187 bus->refcount++; 4188 4189 /* Insertion sort into our bus's target list */ 4190 cur_target = TAILQ_FIRST(&bus->et_entries); 4191 while (cur_target != NULL && cur_target->target_id < target_id) 4192 cur_target = TAILQ_NEXT(cur_target, links); 4193 4194 if (cur_target != NULL) { 4195 TAILQ_INSERT_BEFORE(cur_target, target, links); 4196 } else { 4197 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4198 } 4199 bus->generation++; 4200 } 4201 return (target); 4202 } 4203 4204 static void 4205 xpt_release_target(struct cam_et *target) 4206 { 4207 4208 if ((--target->refcount == 0) 4209 && (TAILQ_FIRST(&target->ed_entries) == NULL)) { 4210 TAILQ_REMOVE(&target->bus->et_entries, target, links); 4211 target->bus->generation++; 4212 xpt_release_bus(target->bus); 4213 free(target, M_CAMXPT); 4214 } 4215 } 4216 4217 static struct cam_ed * 4218 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4219 lun_id_t lun_id) 4220 { 4221 struct cam_ed *device, *cur_device; 4222 4223 device = xpt_alloc_device(bus, target, lun_id); 4224 if (device == NULL) 4225 return (NULL); 4226 4227 device->mintags = 1; 4228 device->maxtags = 1; 4229 bus->sim->max_ccbs += device->ccbq.devq_openings; 4230 cur_device = TAILQ_FIRST(&target->ed_entries); 4231 while (cur_device != NULL && cur_device->lun_id < lun_id) 4232 cur_device = TAILQ_NEXT(cur_device, links); 4233 if (cur_device != NULL) { 4234 TAILQ_INSERT_BEFORE(cur_device, device, links); 4235 } else { 4236 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4237 } 4238 target->generation++; 4239 4240 return (device); 4241 } 4242 4243 struct cam_ed * 4244 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4245 { 4246 struct cam_ed *device; 4247 struct cam_devq *devq; 4248 cam_status status; 4249 4250 /* Make space for us in the device queue on our bus */ 4251 devq = bus->sim->devq; 4252 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4253 4254 if (status != CAM_REQ_CMP) { 4255 device = NULL; 4256 } else { 4257 device = (struct cam_ed *)malloc(sizeof(*device), 4258 M_CAMXPT, M_NOWAIT); 4259 } 4260 4261 if (device != NULL) { 4262 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4263 device->alloc_ccb_entry.device = device; 4264 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4265 device->send_ccb_entry.device = device; 4266 device->target = target; 4267 device->lun_id = lun_id; 4268 device->sim = bus->sim; 4269 /* Initialize our queues */ 4270 if (camq_init(&device->drvq, 0) != 0) { 4271 free(device, M_CAMXPT); 4272 return (NULL); 4273 } 4274 if (cam_ccbq_init(&device->ccbq, 4275 bus->sim->max_dev_openings) != 0) { 4276 camq_fini(&device->drvq); 4277 free(device, M_CAMXPT); 4278 return (NULL); 4279 } 4280 SLIST_INIT(&device->asyncs); 4281 SLIST_INIT(&device->periphs); 4282 device->generation = 0; 4283 device->owner = NULL; 4284 device->flags = CAM_DEV_UNCONFIGURED; 4285 device->tag_delay_count = 0; 4286 device->tag_saved_openings = 0; 4287 device->refcount = 1; 4288 callout_init_mtx(&device->callout, bus->sim->mtx, 0); 4289 4290 /* 4291 * Hold a reference to our parent target so it 4292 * will not go away before we do. 4293 */ 4294 target->refcount++; 4295 4296 } 4297 return (device); 4298 } 4299 4300 void 4301 xpt_acquire_device(struct cam_ed *device) 4302 { 4303 4304 device->refcount++; 4305 } 4306 4307 void 4308 xpt_release_device(struct cam_ed *device) 4309 { 4310 4311 if (--device->refcount == 0) { 4312 struct cam_devq *devq; 4313 4314 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4315 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4316 panic("Removing device while still queued for ccbs"); 4317 4318 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4319 callout_stop(&device->callout); 4320 4321 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4322 device->target->generation++; 4323 device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings; 4324 /* Release our slot in the devq */ 4325 devq = device->target->bus->sim->devq; 4326 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4327 camq_fini(&device->drvq); 4328 cam_ccbq_fini(&device->ccbq); 4329 xpt_release_target(device->target); 4330 free(device, M_CAMXPT); 4331 } 4332 } 4333 4334 u_int32_t 4335 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4336 { 4337 int diff; 4338 int result; 4339 struct cam_ed *dev; 4340 4341 dev = path->device; 4342 4343 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4344 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4345 if (result == CAM_REQ_CMP && (diff < 0)) { 4346 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4347 } 4348 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4349 || (dev->inq_flags & SID_CmdQue) != 0) 4350 dev->tag_saved_openings = newopenings; 4351 /* Adjust the global limit */ 4352 dev->sim->max_ccbs += diff; 4353 return (result); 4354 } 4355 4356 static struct cam_eb * 4357 xpt_find_bus(path_id_t path_id) 4358 { 4359 struct cam_eb *bus; 4360 4361 mtx_lock(&xsoftc.xpt_topo_lock); 4362 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4363 bus != NULL; 4364 bus = TAILQ_NEXT(bus, links)) { 4365 if (bus->path_id == path_id) { 4366 bus->refcount++; 4367 break; 4368 } 4369 } 4370 mtx_unlock(&xsoftc.xpt_topo_lock); 4371 return (bus); 4372 } 4373 4374 static struct cam_et * 4375 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4376 { 4377 struct cam_et *target; 4378 4379 for (target = TAILQ_FIRST(&bus->et_entries); 4380 target != NULL; 4381 target = TAILQ_NEXT(target, links)) { 4382 if (target->target_id == target_id) { 4383 target->refcount++; 4384 break; 4385 } 4386 } 4387 return (target); 4388 } 4389 4390 static struct cam_ed * 4391 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4392 { 4393 struct cam_ed *device; 4394 4395 for (device = TAILQ_FIRST(&target->ed_entries); 4396 device != NULL; 4397 device = TAILQ_NEXT(device, links)) { 4398 if (device->lun_id == lun_id) { 4399 device->refcount++; 4400 break; 4401 } 4402 } 4403 return (device); 4404 } 4405 4406 void 4407 xpt_start_tags(struct cam_path *path) 4408 { 4409 struct ccb_relsim crs; 4410 struct cam_ed *device; 4411 struct cam_sim *sim; 4412 int newopenings; 4413 4414 device = path->device; 4415 sim = path->bus->sim; 4416 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4417 xpt_freeze_devq(path, /*count*/1); 4418 device->inq_flags |= SID_CmdQue; 4419 if (device->tag_saved_openings != 0) 4420 newopenings = device->tag_saved_openings; 4421 else 4422 newopenings = min(device->maxtags, 4423 sim->max_tagged_dev_openings); 4424 xpt_dev_ccbq_resize(path, newopenings); 4425 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4426 crs.ccb_h.func_code = XPT_REL_SIMQ; 4427 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4428 crs.openings 4429 = crs.release_timeout 4430 = crs.qfrozen_cnt 4431 = 0; 4432 xpt_action((union ccb *)&crs); 4433 } 4434 4435 void 4436 xpt_stop_tags(struct cam_path *path) 4437 { 4438 struct ccb_relsim crs; 4439 struct cam_ed *device; 4440 struct cam_sim *sim; 4441 4442 device = path->device; 4443 sim = path->bus->sim; 4444 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4445 device->tag_delay_count = 0; 4446 xpt_freeze_devq(path, /*count*/1); 4447 device->inq_flags &= ~SID_CmdQue; 4448 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4449 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4450 crs.ccb_h.func_code = XPT_REL_SIMQ; 4451 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4452 crs.openings 4453 = crs.release_timeout 4454 = crs.qfrozen_cnt 4455 = 0; 4456 xpt_action((union ccb *)&crs); 4457 } 4458 4459 static void 4460 xpt_boot_delay(void *arg) 4461 { 4462 4463 xpt_release_boot(); 4464 } 4465 4466 static void 4467 xpt_config(void *arg) 4468 { 4469 /* 4470 * Now that interrupts are enabled, go find our devices 4471 */ 4472 4473 #ifdef CAMDEBUG 4474 /* Setup debugging flags and path */ 4475 #ifdef CAM_DEBUG_FLAGS 4476 cam_dflags = CAM_DEBUG_FLAGS; 4477 #else /* !CAM_DEBUG_FLAGS */ 4478 cam_dflags = CAM_DEBUG_NONE; 4479 #endif /* CAM_DEBUG_FLAGS */ 4480 #ifdef CAM_DEBUG_BUS 4481 if (cam_dflags != CAM_DEBUG_NONE) { 4482 /* 4483 * Locking is specifically omitted here. No SIMs have 4484 * registered yet, so xpt_create_path will only be searching 4485 * empty lists of targets and devices. 4486 */ 4487 if (xpt_create_path(&cam_dpath, xpt_periph, 4488 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4489 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4490 printf("xpt_config: xpt_create_path() failed for debug" 4491 " target %d:%d:%d, debugging disabled\n", 4492 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4493 cam_dflags = CAM_DEBUG_NONE; 4494 } 4495 } else 4496 cam_dpath = NULL; 4497 #else /* !CAM_DEBUG_BUS */ 4498 cam_dpath = NULL; 4499 #endif /* CAM_DEBUG_BUS */ 4500 #endif /* CAMDEBUG */ 4501 4502 periphdriver_init(1); 4503 xpt_hold_boot(); 4504 callout_init(&xsoftc.boot_callout, 1); 4505 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000, 4506 xpt_boot_delay, NULL); 4507 /* Fire up rescan thread. */ 4508 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) { 4509 printf("xpt_init: failed to create rescan thread\n"); 4510 } 4511 } 4512 4513 void 4514 xpt_hold_boot(void) 4515 { 4516 xpt_lock_buses(); 4517 xsoftc.buses_to_config++; 4518 xpt_unlock_buses(); 4519 } 4520 4521 void 4522 xpt_release_boot(void) 4523 { 4524 xpt_lock_buses(); 4525 xsoftc.buses_to_config--; 4526 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 4527 struct xpt_task *task; 4528 4529 xsoftc.buses_config_done = 1; 4530 xpt_unlock_buses(); 4531 /* Call manually because we don't have any busses */ 4532 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4533 if (task != NULL) { 4534 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4535 taskqueue_enqueue(taskqueue_thread, &task->task); 4536 } 4537 } else 4538 xpt_unlock_buses(); 4539 } 4540 4541 /* 4542 * If the given device only has one peripheral attached to it, and if that 4543 * peripheral is the passthrough driver, announce it. This insures that the 4544 * user sees some sort of announcement for every peripheral in their system. 4545 */ 4546 static int 4547 xptpassannouncefunc(struct cam_ed *device, void *arg) 4548 { 4549 struct cam_periph *periph; 4550 int i; 4551 4552 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 4553 periph = SLIST_NEXT(periph, periph_links), i++); 4554 4555 periph = SLIST_FIRST(&device->periphs); 4556 if ((i == 1) 4557 && (strncmp(periph->periph_name, "pass", 4) == 0)) 4558 xpt_announce_periph(periph, NULL); 4559 4560 return(1); 4561 } 4562 4563 static void 4564 xpt_finishconfig_task(void *context, int pending) 4565 { 4566 4567 periphdriver_init(2); 4568 /* 4569 * Check for devices with no "standard" peripheral driver 4570 * attached. For any devices like that, announce the 4571 * passthrough driver so the user will see something. 4572 */ 4573 xpt_for_all_devices(xptpassannouncefunc, NULL); 4574 4575 /* Release our hook so that the boot can continue. */ 4576 config_intrhook_disestablish(xsoftc.xpt_config_hook); 4577 free(xsoftc.xpt_config_hook, M_CAMXPT); 4578 xsoftc.xpt_config_hook = NULL; 4579 4580 free(context, M_CAMXPT); 4581 } 4582 4583 cam_status 4584 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 4585 struct cam_path *path) 4586 { 4587 struct ccb_setasync csa; 4588 cam_status status; 4589 int xptpath = 0; 4590 4591 if (path == NULL) { 4592 mtx_lock(&xsoftc.xpt_lock); 4593 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 4594 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4595 if (status != CAM_REQ_CMP) { 4596 mtx_unlock(&xsoftc.xpt_lock); 4597 return (status); 4598 } 4599 xptpath = 1; 4600 } 4601 4602 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 4603 csa.ccb_h.func_code = XPT_SASYNC_CB; 4604 csa.event_enable = event; 4605 csa.callback = cbfunc; 4606 csa.callback_arg = cbarg; 4607 xpt_action((union ccb *)&csa); 4608 status = csa.ccb_h.status; 4609 if (xptpath) { 4610 xpt_free_path(path); 4611 mtx_unlock(&xsoftc.xpt_lock); 4612 4613 if ((status == CAM_REQ_CMP) && 4614 (csa.event_enable & AC_FOUND_DEVICE)) { 4615 /* 4616 * Get this peripheral up to date with all 4617 * the currently existing devices. 4618 */ 4619 xpt_for_all_devices(xptsetasyncfunc, &csa); 4620 } 4621 if ((status == CAM_REQ_CMP) && 4622 (csa.event_enable & AC_PATH_REGISTERED)) { 4623 /* 4624 * Get this peripheral up to date with all 4625 * the currently existing busses. 4626 */ 4627 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 4628 } 4629 } 4630 return (status); 4631 } 4632 4633 static void 4634 xptaction(struct cam_sim *sim, union ccb *work_ccb) 4635 { 4636 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 4637 4638 switch (work_ccb->ccb_h.func_code) { 4639 /* Common cases first */ 4640 case XPT_PATH_INQ: /* Path routing inquiry */ 4641 { 4642 struct ccb_pathinq *cpi; 4643 4644 cpi = &work_ccb->cpi; 4645 cpi->version_num = 1; /* XXX??? */ 4646 cpi->hba_inquiry = 0; 4647 cpi->target_sprt = 0; 4648 cpi->hba_misc = 0; 4649 cpi->hba_eng_cnt = 0; 4650 cpi->max_target = 0; 4651 cpi->max_lun = 0; 4652 cpi->initiator_id = 0; 4653 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 4654 strncpy(cpi->hba_vid, "", HBA_IDLEN); 4655 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 4656 cpi->unit_number = sim->unit_number; 4657 cpi->bus_id = sim->bus_id; 4658 cpi->base_transfer_speed = 0; 4659 cpi->protocol = PROTO_UNSPECIFIED; 4660 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 4661 cpi->transport = XPORT_UNSPECIFIED; 4662 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 4663 cpi->ccb_h.status = CAM_REQ_CMP; 4664 xpt_done(work_ccb); 4665 break; 4666 } 4667 default: 4668 work_ccb->ccb_h.status = CAM_REQ_INVALID; 4669 xpt_done(work_ccb); 4670 break; 4671 } 4672 } 4673 4674 /* 4675 * The xpt as a "controller" has no interrupt sources, so polling 4676 * is a no-op. 4677 */ 4678 static void 4679 xptpoll(struct cam_sim *sim) 4680 { 4681 } 4682 4683 void 4684 xpt_lock_buses(void) 4685 { 4686 mtx_lock(&xsoftc.xpt_topo_lock); 4687 } 4688 4689 void 4690 xpt_unlock_buses(void) 4691 { 4692 mtx_unlock(&xsoftc.xpt_topo_lock); 4693 } 4694 4695 static void 4696 camisr(void *dummy) 4697 { 4698 cam_simq_t queue; 4699 struct cam_sim *sim; 4700 4701 mtx_lock(&cam_simq_lock); 4702 TAILQ_INIT(&queue); 4703 while (!TAILQ_EMPTY(&cam_simq)) { 4704 TAILQ_CONCAT(&queue, &cam_simq, links); 4705 mtx_unlock(&cam_simq_lock); 4706 4707 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 4708 TAILQ_REMOVE(&queue, sim, links); 4709 CAM_SIM_LOCK(sim); 4710 sim->flags &= ~CAM_SIM_ON_DONEQ; 4711 camisr_runqueue(&sim->sim_doneq); 4712 CAM_SIM_UNLOCK(sim); 4713 } 4714 mtx_lock(&cam_simq_lock); 4715 } 4716 mtx_unlock(&cam_simq_lock); 4717 } 4718 4719 static void 4720 camisr_runqueue(void *V_queue) 4721 { 4722 cam_isrq_t *queue = V_queue; 4723 struct ccb_hdr *ccb_h; 4724 4725 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 4726 int runq; 4727 4728 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 4729 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 4730 4731 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 4732 ("camisr\n")); 4733 4734 runq = FALSE; 4735 4736 if (ccb_h->flags & CAM_HIGH_POWER) { 4737 struct highpowerlist *hphead; 4738 union ccb *send_ccb; 4739 4740 mtx_lock(&xsoftc.xpt_lock); 4741 hphead = &xsoftc.highpowerq; 4742 4743 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 4744 4745 /* 4746 * Increment the count since this command is done. 4747 */ 4748 xsoftc.num_highpower++; 4749 4750 /* 4751 * Any high powered commands queued up? 4752 */ 4753 if (send_ccb != NULL) { 4754 4755 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 4756 mtx_unlock(&xsoftc.xpt_lock); 4757 4758 xpt_release_devq(send_ccb->ccb_h.path, 4759 /*count*/1, /*runqueue*/TRUE); 4760 } else 4761 mtx_unlock(&xsoftc.xpt_lock); 4762 } 4763 4764 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 4765 struct cam_ed *dev; 4766 4767 dev = ccb_h->path->device; 4768 4769 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 4770 ccb_h->path->bus->sim->devq->send_active--; 4771 ccb_h->path->bus->sim->devq->send_openings++; 4772 runq = TRUE; 4773 4774 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 4775 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 4776 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 4777 && (dev->ccbq.dev_active == 0))) { 4778 xpt_release_devq(ccb_h->path, /*count*/1, 4779 /*run_queue*/FALSE); 4780 } 4781 4782 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4783 && (--dev->tag_delay_count == 0)) 4784 xpt_start_tags(ccb_h->path); 4785 if (!device_is_send_queued(dev)) 4786 xpt_schedule_dev_sendq(ccb_h->path->bus, dev); 4787 } 4788 4789 if (ccb_h->status & CAM_RELEASE_SIMQ) { 4790 xpt_release_simq(ccb_h->path->bus->sim, 4791 /*run_queue*/TRUE); 4792 ccb_h->status &= ~CAM_RELEASE_SIMQ; 4793 runq = FALSE; 4794 } 4795 4796 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 4797 && (ccb_h->status & CAM_DEV_QFRZN)) { 4798 xpt_release_devq(ccb_h->path, /*count*/1, 4799 /*run_queue*/TRUE); 4800 ccb_h->status &= ~CAM_DEV_QFRZN; 4801 } else if (runq) { 4802 xpt_run_dev_sendq(ccb_h->path->bus); 4803 } 4804 4805 /* Call the peripheral driver's callback */ 4806 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 4807 } 4808 }
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