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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/8.2/sys/cam/cam_xpt.c 215173 2010-11-12 11:22:59Z brucec $"); 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/reboot.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 xpt_lock_buses(); 2114 for (periph = (start_periph ? start_periph : 2115 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2116 periph = next_periph) { 2117 2118 next_periph = TAILQ_NEXT(periph, unit_links); 2119 2120 retval = tr_func(periph, arg); 2121 if (retval == 0) { 2122 xpt_unlock_buses(); 2123 return(retval); 2124 } 2125 } 2126 xpt_unlock_buses(); 2127 return(retval); 2128 } 2129 2130 static int 2131 xptdefbusfunc(struct cam_eb *bus, void *arg) 2132 { 2133 struct xpt_traverse_config *tr_config; 2134 2135 tr_config = (struct xpt_traverse_config *)arg; 2136 2137 if (tr_config->depth == XPT_DEPTH_BUS) { 2138 xpt_busfunc_t *tr_func; 2139 2140 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2141 2142 return(tr_func(bus, tr_config->tr_arg)); 2143 } else 2144 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2145 } 2146 2147 static int 2148 xptdeftargetfunc(struct cam_et *target, void *arg) 2149 { 2150 struct xpt_traverse_config *tr_config; 2151 2152 tr_config = (struct xpt_traverse_config *)arg; 2153 2154 if (tr_config->depth == XPT_DEPTH_TARGET) { 2155 xpt_targetfunc_t *tr_func; 2156 2157 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2158 2159 return(tr_func(target, tr_config->tr_arg)); 2160 } else 2161 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2162 } 2163 2164 static int 2165 xptdefdevicefunc(struct cam_ed *device, void *arg) 2166 { 2167 struct xpt_traverse_config *tr_config; 2168 2169 tr_config = (struct xpt_traverse_config *)arg; 2170 2171 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2172 xpt_devicefunc_t *tr_func; 2173 2174 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2175 2176 return(tr_func(device, tr_config->tr_arg)); 2177 } else 2178 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2179 } 2180 2181 static int 2182 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2183 { 2184 struct xpt_traverse_config *tr_config; 2185 xpt_periphfunc_t *tr_func; 2186 2187 tr_config = (struct xpt_traverse_config *)arg; 2188 2189 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2190 2191 /* 2192 * Unlike the other default functions, we don't check for depth 2193 * here. The peripheral driver level is the last level in the EDT, 2194 * so if we're here, we should execute the function in question. 2195 */ 2196 return(tr_func(periph, tr_config->tr_arg)); 2197 } 2198 2199 /* 2200 * Execute the given function for every bus in the EDT. 2201 */ 2202 static int 2203 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2204 { 2205 struct xpt_traverse_config tr_config; 2206 2207 tr_config.depth = XPT_DEPTH_BUS; 2208 tr_config.tr_func = tr_func; 2209 tr_config.tr_arg = arg; 2210 2211 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2212 } 2213 2214 /* 2215 * Execute the given function for every device in the EDT. 2216 */ 2217 static int 2218 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2219 { 2220 struct xpt_traverse_config tr_config; 2221 2222 tr_config.depth = XPT_DEPTH_DEVICE; 2223 tr_config.tr_func = tr_func; 2224 tr_config.tr_arg = arg; 2225 2226 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2227 } 2228 2229 static int 2230 xptsetasyncfunc(struct cam_ed *device, void *arg) 2231 { 2232 struct cam_path path; 2233 struct ccb_getdev cgd; 2234 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2235 2236 /* 2237 * Don't report unconfigured devices (Wildcard devs, 2238 * devices only for target mode, device instances 2239 * that have been invalidated but are waiting for 2240 * their last reference count to be released). 2241 */ 2242 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2243 return (1); 2244 2245 xpt_compile_path(&path, 2246 NULL, 2247 device->target->bus->path_id, 2248 device->target->target_id, 2249 device->lun_id); 2250 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2251 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2252 xpt_action((union ccb *)&cgd); 2253 csa->callback(csa->callback_arg, 2254 AC_FOUND_DEVICE, 2255 &path, &cgd); 2256 xpt_release_path(&path); 2257 2258 return(1); 2259 } 2260 2261 static int 2262 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2263 { 2264 struct cam_path path; 2265 struct ccb_pathinq cpi; 2266 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2267 2268 xpt_compile_path(&path, /*periph*/NULL, 2269 bus->sim->path_id, 2270 CAM_TARGET_WILDCARD, 2271 CAM_LUN_WILDCARD); 2272 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2273 cpi.ccb_h.func_code = XPT_PATH_INQ; 2274 xpt_action((union ccb *)&cpi); 2275 csa->callback(csa->callback_arg, 2276 AC_PATH_REGISTERED, 2277 &path, &cpi); 2278 xpt_release_path(&path); 2279 2280 return(1); 2281 } 2282 2283 void 2284 xpt_action(union ccb *start_ccb) 2285 { 2286 2287 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2288 2289 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2290 /* Compatibility for RL-unaware code. */ 2291 if (CAM_PRIORITY_TO_RL(start_ccb->ccb_h.pinfo.priority) == 0) 2292 start_ccb->ccb_h.pinfo.priority += CAM_PRIORITY_NORMAL - 1; 2293 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2294 } 2295 2296 void 2297 xpt_action_default(union ccb *start_ccb) 2298 { 2299 2300 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2301 2302 switch (start_ccb->ccb_h.func_code) { 2303 case XPT_SCSI_IO: 2304 { 2305 struct cam_ed *device; 2306 #ifdef CAMDEBUG 2307 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2308 struct cam_path *path; 2309 2310 path = start_ccb->ccb_h.path; 2311 #endif 2312 2313 /* 2314 * For the sake of compatibility with SCSI-1 2315 * devices that may not understand the identify 2316 * message, we include lun information in the 2317 * second byte of all commands. SCSI-1 specifies 2318 * that luns are a 3 bit value and reserves only 3 2319 * bits for lun information in the CDB. Later 2320 * revisions of the SCSI spec allow for more than 8 2321 * luns, but have deprecated lun information in the 2322 * CDB. So, if the lun won't fit, we must omit. 2323 * 2324 * Also be aware that during initial probing for devices, 2325 * the inquiry information is unknown but initialized to 0. 2326 * This means that this code will be exercised while probing 2327 * devices with an ANSI revision greater than 2. 2328 */ 2329 device = start_ccb->ccb_h.path->device; 2330 if (device->protocol_version <= SCSI_REV_2 2331 && start_ccb->ccb_h.target_lun < 8 2332 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2333 2334 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2335 start_ccb->ccb_h.target_lun << 5; 2336 } 2337 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2338 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2339 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2340 &path->device->inq_data), 2341 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2342 cdb_str, sizeof(cdb_str)))); 2343 } 2344 /* FALLTHROUGH */ 2345 case XPT_TARGET_IO: 2346 case XPT_CONT_TARGET_IO: 2347 start_ccb->csio.sense_resid = 0; 2348 start_ccb->csio.resid = 0; 2349 /* FALLTHROUGH */ 2350 case XPT_ATA_IO: 2351 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) { 2352 start_ccb->ataio.resid = 0; 2353 } 2354 /* FALLTHROUGH */ 2355 case XPT_RESET_DEV: 2356 case XPT_ENG_EXEC: 2357 { 2358 struct cam_path *path = start_ccb->ccb_h.path; 2359 int frozen; 2360 2361 frozen = cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2362 path->device->sim->devq->alloc_openings += frozen; 2363 if (frozen > 0) 2364 xpt_run_dev_allocq(path->bus); 2365 if (xpt_schedule_dev_sendq(path->bus, path->device)) 2366 xpt_run_dev_sendq(path->bus); 2367 break; 2368 } 2369 case XPT_CALC_GEOMETRY: 2370 { 2371 struct cam_sim *sim; 2372 2373 /* Filter out garbage */ 2374 if (start_ccb->ccg.block_size == 0 2375 || start_ccb->ccg.volume_size == 0) { 2376 start_ccb->ccg.cylinders = 0; 2377 start_ccb->ccg.heads = 0; 2378 start_ccb->ccg.secs_per_track = 0; 2379 start_ccb->ccb_h.status = CAM_REQ_CMP; 2380 break; 2381 } 2382 #ifdef PC98 2383 /* 2384 * In a PC-98 system, geometry translation depens on 2385 * the "real" device geometry obtained from mode page 4. 2386 * SCSI geometry translation is performed in the 2387 * initialization routine of the SCSI BIOS and the result 2388 * stored in host memory. If the translation is available 2389 * in host memory, use it. If not, rely on the default 2390 * translation the device driver performs. 2391 */ 2392 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2393 start_ccb->ccb_h.status = CAM_REQ_CMP; 2394 break; 2395 } 2396 #endif 2397 sim = start_ccb->ccb_h.path->bus->sim; 2398 (*(sim->sim_action))(sim, start_ccb); 2399 break; 2400 } 2401 case XPT_ABORT: 2402 { 2403 union ccb* abort_ccb; 2404 2405 abort_ccb = start_ccb->cab.abort_ccb; 2406 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2407 2408 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2409 struct cam_ccbq *ccbq; 2410 struct cam_ed *device; 2411 2412 device = abort_ccb->ccb_h.path->device; 2413 ccbq = &device->ccbq; 2414 device->sim->devq->alloc_openings -= 2415 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2416 abort_ccb->ccb_h.status = 2417 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2418 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2419 xpt_done(abort_ccb); 2420 start_ccb->ccb_h.status = CAM_REQ_CMP; 2421 break; 2422 } 2423 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2424 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2425 /* 2426 * We've caught this ccb en route to 2427 * the SIM. Flag it for abort and the 2428 * SIM will do so just before starting 2429 * real work on the CCB. 2430 */ 2431 abort_ccb->ccb_h.status = 2432 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2433 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2434 start_ccb->ccb_h.status = CAM_REQ_CMP; 2435 break; 2436 } 2437 } 2438 if (XPT_FC_IS_QUEUED(abort_ccb) 2439 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2440 /* 2441 * It's already completed but waiting 2442 * for our SWI to get to it. 2443 */ 2444 start_ccb->ccb_h.status = CAM_UA_ABORT; 2445 break; 2446 } 2447 /* 2448 * If we weren't able to take care of the abort request 2449 * in the XPT, pass the request down to the SIM for processing. 2450 */ 2451 } 2452 /* FALLTHROUGH */ 2453 case XPT_ACCEPT_TARGET_IO: 2454 case XPT_EN_LUN: 2455 case XPT_IMMED_NOTIFY: 2456 case XPT_NOTIFY_ACK: 2457 case XPT_RESET_BUS: 2458 case XPT_IMMEDIATE_NOTIFY: 2459 case XPT_NOTIFY_ACKNOWLEDGE: 2460 case XPT_GET_SIM_KNOB: 2461 case XPT_SET_SIM_KNOB: 2462 { 2463 struct cam_sim *sim; 2464 2465 sim = start_ccb->ccb_h.path->bus->sim; 2466 (*(sim->sim_action))(sim, start_ccb); 2467 break; 2468 } 2469 case XPT_PATH_INQ: 2470 { 2471 struct cam_sim *sim; 2472 2473 sim = start_ccb->ccb_h.path->bus->sim; 2474 (*(sim->sim_action))(sim, start_ccb); 2475 break; 2476 } 2477 case XPT_PATH_STATS: 2478 start_ccb->cpis.last_reset = 2479 start_ccb->ccb_h.path->bus->last_reset; 2480 start_ccb->ccb_h.status = CAM_REQ_CMP; 2481 break; 2482 case XPT_GDEV_TYPE: 2483 { 2484 struct cam_ed *dev; 2485 2486 dev = start_ccb->ccb_h.path->device; 2487 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2488 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2489 } else { 2490 struct ccb_getdev *cgd; 2491 struct cam_eb *bus; 2492 struct cam_et *tar; 2493 2494 cgd = &start_ccb->cgd; 2495 bus = cgd->ccb_h.path->bus; 2496 tar = cgd->ccb_h.path->target; 2497 cgd->protocol = dev->protocol; 2498 cgd->inq_data = dev->inq_data; 2499 cgd->ident_data = dev->ident_data; 2500 cgd->inq_flags = dev->inq_flags; 2501 cgd->ccb_h.status = CAM_REQ_CMP; 2502 cgd->serial_num_len = dev->serial_num_len; 2503 if ((dev->serial_num_len > 0) 2504 && (dev->serial_num != NULL)) 2505 bcopy(dev->serial_num, cgd->serial_num, 2506 dev->serial_num_len); 2507 } 2508 break; 2509 } 2510 case XPT_GDEV_STATS: 2511 { 2512 struct cam_ed *dev; 2513 2514 dev = start_ccb->ccb_h.path->device; 2515 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2516 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2517 } else { 2518 struct ccb_getdevstats *cgds; 2519 struct cam_eb *bus; 2520 struct cam_et *tar; 2521 2522 cgds = &start_ccb->cgds; 2523 bus = cgds->ccb_h.path->bus; 2524 tar = cgds->ccb_h.path->target; 2525 cgds->dev_openings = dev->ccbq.dev_openings; 2526 cgds->dev_active = dev->ccbq.dev_active; 2527 cgds->devq_openings = dev->ccbq.devq_openings; 2528 cgds->devq_queued = dev->ccbq.queue.entries; 2529 cgds->held = dev->ccbq.held; 2530 cgds->last_reset = tar->last_reset; 2531 cgds->maxtags = dev->maxtags; 2532 cgds->mintags = dev->mintags; 2533 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2534 cgds->last_reset = bus->last_reset; 2535 cgds->ccb_h.status = CAM_REQ_CMP; 2536 } 2537 break; 2538 } 2539 case XPT_GDEVLIST: 2540 { 2541 struct cam_periph *nperiph; 2542 struct periph_list *periph_head; 2543 struct ccb_getdevlist *cgdl; 2544 u_int i; 2545 struct cam_ed *device; 2546 int found; 2547 2548 2549 found = 0; 2550 2551 /* 2552 * Don't want anyone mucking with our data. 2553 */ 2554 device = start_ccb->ccb_h.path->device; 2555 periph_head = &device->periphs; 2556 cgdl = &start_ccb->cgdl; 2557 2558 /* 2559 * Check and see if the list has changed since the user 2560 * last requested a list member. If so, tell them that the 2561 * list has changed, and therefore they need to start over 2562 * from the beginning. 2563 */ 2564 if ((cgdl->index != 0) && 2565 (cgdl->generation != device->generation)) { 2566 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2567 break; 2568 } 2569 2570 /* 2571 * Traverse the list of peripherals and attempt to find 2572 * the requested peripheral. 2573 */ 2574 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2575 (nperiph != NULL) && (i <= cgdl->index); 2576 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2577 if (i == cgdl->index) { 2578 strncpy(cgdl->periph_name, 2579 nperiph->periph_name, 2580 DEV_IDLEN); 2581 cgdl->unit_number = nperiph->unit_number; 2582 found = 1; 2583 } 2584 } 2585 if (found == 0) { 2586 cgdl->status = CAM_GDEVLIST_ERROR; 2587 break; 2588 } 2589 2590 if (nperiph == NULL) 2591 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2592 else 2593 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2594 2595 cgdl->index++; 2596 cgdl->generation = device->generation; 2597 2598 cgdl->ccb_h.status = CAM_REQ_CMP; 2599 break; 2600 } 2601 case XPT_DEV_MATCH: 2602 { 2603 dev_pos_type position_type; 2604 struct ccb_dev_match *cdm; 2605 2606 cdm = &start_ccb->cdm; 2607 2608 /* 2609 * There are two ways of getting at information in the EDT. 2610 * The first way is via the primary EDT tree. It starts 2611 * with a list of busses, then a list of targets on a bus, 2612 * then devices/luns on a target, and then peripherals on a 2613 * device/lun. The "other" way is by the peripheral driver 2614 * lists. The peripheral driver lists are organized by 2615 * peripheral driver. (obviously) So it makes sense to 2616 * use the peripheral driver list if the user is looking 2617 * for something like "da1", or all "da" devices. If the 2618 * user is looking for something on a particular bus/target 2619 * or lun, it's generally better to go through the EDT tree. 2620 */ 2621 2622 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2623 position_type = cdm->pos.position_type; 2624 else { 2625 u_int i; 2626 2627 position_type = CAM_DEV_POS_NONE; 2628 2629 for (i = 0; i < cdm->num_patterns; i++) { 2630 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2631 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2632 position_type = CAM_DEV_POS_EDT; 2633 break; 2634 } 2635 } 2636 2637 if (cdm->num_patterns == 0) 2638 position_type = CAM_DEV_POS_EDT; 2639 else if (position_type == CAM_DEV_POS_NONE) 2640 position_type = CAM_DEV_POS_PDRV; 2641 } 2642 2643 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2644 case CAM_DEV_POS_EDT: 2645 xptedtmatch(cdm); 2646 break; 2647 case CAM_DEV_POS_PDRV: 2648 xptperiphlistmatch(cdm); 2649 break; 2650 default: 2651 cdm->status = CAM_DEV_MATCH_ERROR; 2652 break; 2653 } 2654 2655 if (cdm->status == CAM_DEV_MATCH_ERROR) 2656 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2657 else 2658 start_ccb->ccb_h.status = CAM_REQ_CMP; 2659 2660 break; 2661 } 2662 case XPT_SASYNC_CB: 2663 { 2664 struct ccb_setasync *csa; 2665 struct async_node *cur_entry; 2666 struct async_list *async_head; 2667 u_int32_t added; 2668 2669 csa = &start_ccb->csa; 2670 added = csa->event_enable; 2671 async_head = &csa->ccb_h.path->device->asyncs; 2672 2673 /* 2674 * If there is already an entry for us, simply 2675 * update it. 2676 */ 2677 cur_entry = SLIST_FIRST(async_head); 2678 while (cur_entry != NULL) { 2679 if ((cur_entry->callback_arg == csa->callback_arg) 2680 && (cur_entry->callback == csa->callback)) 2681 break; 2682 cur_entry = SLIST_NEXT(cur_entry, links); 2683 } 2684 2685 if (cur_entry != NULL) { 2686 /* 2687 * If the request has no flags set, 2688 * remove the entry. 2689 */ 2690 added &= ~cur_entry->event_enable; 2691 if (csa->event_enable == 0) { 2692 SLIST_REMOVE(async_head, cur_entry, 2693 async_node, links); 2694 xpt_release_device(csa->ccb_h.path->device); 2695 free(cur_entry, M_CAMXPT); 2696 } else { 2697 cur_entry->event_enable = csa->event_enable; 2698 } 2699 csa->event_enable = added; 2700 } else { 2701 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2702 M_NOWAIT); 2703 if (cur_entry == NULL) { 2704 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2705 break; 2706 } 2707 cur_entry->event_enable = csa->event_enable; 2708 cur_entry->callback_arg = csa->callback_arg; 2709 cur_entry->callback = csa->callback; 2710 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2711 xpt_acquire_device(csa->ccb_h.path->device); 2712 } 2713 start_ccb->ccb_h.status = CAM_REQ_CMP; 2714 break; 2715 } 2716 case XPT_REL_SIMQ: 2717 { 2718 struct ccb_relsim *crs; 2719 struct cam_ed *dev; 2720 2721 crs = &start_ccb->crs; 2722 dev = crs->ccb_h.path->device; 2723 if (dev == NULL) { 2724 2725 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2726 break; 2727 } 2728 2729 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2730 2731 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 2732 /* Don't ever go below one opening */ 2733 if (crs->openings > 0) { 2734 xpt_dev_ccbq_resize(crs->ccb_h.path, 2735 crs->openings); 2736 2737 if (bootverbose) { 2738 xpt_print(crs->ccb_h.path, 2739 "tagged openings now %d\n", 2740 crs->openings); 2741 } 2742 } 2743 } 2744 } 2745 2746 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2747 2748 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2749 2750 /* 2751 * Just extend the old timeout and decrement 2752 * the freeze count so that a single timeout 2753 * is sufficient for releasing the queue. 2754 */ 2755 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2756 callout_stop(&dev->callout); 2757 } else { 2758 2759 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2760 } 2761 2762 callout_reset(&dev->callout, 2763 (crs->release_timeout * hz) / 1000, 2764 xpt_release_devq_timeout, dev); 2765 2766 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2767 2768 } 2769 2770 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2771 2772 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2773 /* 2774 * Decrement the freeze count so that a single 2775 * completion is still sufficient to unfreeze 2776 * the queue. 2777 */ 2778 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2779 } else { 2780 2781 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2782 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2783 } 2784 } 2785 2786 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2787 2788 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2789 || (dev->ccbq.dev_active == 0)) { 2790 2791 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2792 } else { 2793 2794 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2795 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2796 } 2797 } 2798 2799 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 2800 xpt_release_devq_rl(crs->ccb_h.path, /*runlevel*/ 2801 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2802 crs->release_timeout : 0, 2803 /*count*/1, /*run_queue*/TRUE); 2804 } 2805 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt[0]; 2806 start_ccb->ccb_h.status = CAM_REQ_CMP; 2807 break; 2808 } 2809 case XPT_DEBUG: { 2810 #ifdef CAMDEBUG 2811 #ifdef CAM_DEBUG_DELAY 2812 cam_debug_delay = CAM_DEBUG_DELAY; 2813 #endif 2814 cam_dflags = start_ccb->cdbg.flags; 2815 if (cam_dpath != NULL) { 2816 xpt_free_path(cam_dpath); 2817 cam_dpath = NULL; 2818 } 2819 2820 if (cam_dflags != CAM_DEBUG_NONE) { 2821 if (xpt_create_path(&cam_dpath, xpt_periph, 2822 start_ccb->ccb_h.path_id, 2823 start_ccb->ccb_h.target_id, 2824 start_ccb->ccb_h.target_lun) != 2825 CAM_REQ_CMP) { 2826 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2827 cam_dflags = CAM_DEBUG_NONE; 2828 } else { 2829 start_ccb->ccb_h.status = CAM_REQ_CMP; 2830 xpt_print(cam_dpath, "debugging flags now %x\n", 2831 cam_dflags); 2832 } 2833 } else { 2834 cam_dpath = NULL; 2835 start_ccb->ccb_h.status = CAM_REQ_CMP; 2836 } 2837 #else /* !CAMDEBUG */ 2838 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2839 #endif /* CAMDEBUG */ 2840 break; 2841 } 2842 case XPT_FREEZE_QUEUE: 2843 { 2844 struct ccb_relsim *crs = &start_ccb->crs; 2845 2846 xpt_freeze_devq_rl(crs->ccb_h.path, /*runlevel*/ 2847 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2848 crs->release_timeout : 0, /*count*/1); 2849 start_ccb->ccb_h.status = CAM_REQ_CMP; 2850 break; 2851 } 2852 case XPT_NOOP: 2853 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 2854 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 2855 start_ccb->ccb_h.status = CAM_REQ_CMP; 2856 break; 2857 default: 2858 case XPT_SDEV_TYPE: 2859 case XPT_TERM_IO: 2860 case XPT_ENG_INQ: 2861 /* XXX Implement */ 2862 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 2863 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 2864 xpt_done(start_ccb); 2865 } 2866 break; 2867 } 2868 } 2869 2870 void 2871 xpt_polled_action(union ccb *start_ccb) 2872 { 2873 u_int32_t timeout; 2874 struct cam_sim *sim; 2875 struct cam_devq *devq; 2876 struct cam_ed *dev; 2877 2878 2879 timeout = start_ccb->ccb_h.timeout * 10; 2880 sim = start_ccb->ccb_h.path->bus->sim; 2881 devq = sim->devq; 2882 dev = start_ccb->ccb_h.path->device; 2883 2884 mtx_assert(sim->mtx, MA_OWNED); 2885 2886 /* 2887 * Steal an opening so that no other queued requests 2888 * can get it before us while we simulate interrupts. 2889 */ 2890 dev->ccbq.devq_openings--; 2891 dev->ccbq.dev_openings--; 2892 2893 while(((devq != NULL && devq->send_openings <= 0) || 2894 dev->ccbq.dev_openings < 0) && (--timeout > 0)) { 2895 DELAY(100); 2896 (*(sim->sim_poll))(sim); 2897 camisr_runqueue(&sim->sim_doneq); 2898 } 2899 2900 dev->ccbq.devq_openings++; 2901 dev->ccbq.dev_openings++; 2902 2903 if (timeout != 0) { 2904 xpt_action(start_ccb); 2905 while(--timeout > 0) { 2906 (*(sim->sim_poll))(sim); 2907 camisr_runqueue(&sim->sim_doneq); 2908 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 2909 != CAM_REQ_INPROG) 2910 break; 2911 DELAY(100); 2912 } 2913 if (timeout == 0) { 2914 /* 2915 * XXX Is it worth adding a sim_timeout entry 2916 * point so we can attempt recovery? If 2917 * this is only used for dumps, I don't think 2918 * it is. 2919 */ 2920 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 2921 } 2922 } else { 2923 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2924 } 2925 } 2926 2927 /* 2928 * Schedule a peripheral driver to receive a ccb when it's 2929 * target device has space for more transactions. 2930 */ 2931 void 2932 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 2933 { 2934 struct cam_ed *device; 2935 int runq = 0; 2936 2937 mtx_assert(perph->sim->mtx, MA_OWNED); 2938 2939 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 2940 device = perph->path->device; 2941 if (periph_is_queued(perph)) { 2942 /* Simply reorder based on new priority */ 2943 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 2944 (" change priority to %d\n", new_priority)); 2945 if (new_priority < perph->pinfo.priority) { 2946 camq_change_priority(&device->drvq, 2947 perph->pinfo.index, 2948 new_priority); 2949 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 2950 } 2951 } else { 2952 /* New entry on the queue */ 2953 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 2954 (" added periph to queue\n")); 2955 perph->pinfo.priority = new_priority; 2956 perph->pinfo.generation = ++device->drvq.generation; 2957 camq_insert(&device->drvq, &perph->pinfo); 2958 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 2959 } 2960 if (runq != 0) { 2961 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 2962 (" calling xpt_run_devq\n")); 2963 xpt_run_dev_allocq(perph->path->bus); 2964 } 2965 } 2966 2967 2968 /* 2969 * Schedule a device to run on a given queue. 2970 * If the device was inserted as a new entry on the queue, 2971 * return 1 meaning the device queue should be run. If we 2972 * were already queued, implying someone else has already 2973 * started the queue, return 0 so the caller doesn't attempt 2974 * to run the queue. 2975 */ 2976 int 2977 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 2978 u_int32_t new_priority) 2979 { 2980 int retval; 2981 u_int32_t old_priority; 2982 2983 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 2984 2985 old_priority = pinfo->priority; 2986 2987 /* 2988 * Are we already queued? 2989 */ 2990 if (pinfo->index != CAM_UNQUEUED_INDEX) { 2991 /* Simply reorder based on new priority */ 2992 if (new_priority < old_priority) { 2993 camq_change_priority(queue, pinfo->index, 2994 new_priority); 2995 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 2996 ("changed priority to %d\n", 2997 new_priority)); 2998 retval = 1; 2999 } else 3000 retval = 0; 3001 } else { 3002 /* New entry on the queue */ 3003 if (new_priority < old_priority) 3004 pinfo->priority = new_priority; 3005 3006 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3007 ("Inserting onto queue\n")); 3008 pinfo->generation = ++queue->generation; 3009 camq_insert(queue, pinfo); 3010 retval = 1; 3011 } 3012 return (retval); 3013 } 3014 3015 static void 3016 xpt_run_dev_allocq(struct cam_eb *bus) 3017 { 3018 struct cam_devq *devq; 3019 3020 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3021 devq = bus->sim->devq; 3022 3023 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3024 (" qfrozen_cnt == 0x%x, entries == %d, " 3025 "openings == %d, active == %d\n", 3026 devq->alloc_queue.qfrozen_cnt[0], 3027 devq->alloc_queue.entries, 3028 devq->alloc_openings, 3029 devq->alloc_active)); 3030 3031 devq->alloc_queue.qfrozen_cnt[0]++; 3032 while ((devq->alloc_queue.entries > 0) 3033 && (devq->alloc_openings > 0) 3034 && (devq->alloc_queue.qfrozen_cnt[0] <= 1)) { 3035 struct cam_ed_qinfo *qinfo; 3036 struct cam_ed *device; 3037 union ccb *work_ccb; 3038 struct cam_periph *drv; 3039 struct camq *drvq; 3040 3041 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3042 CAMQ_HEAD); 3043 device = qinfo->device; 3044 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3045 ("running device %p\n", device)); 3046 3047 drvq = &device->drvq; 3048 3049 #ifdef CAMDEBUG 3050 if (drvq->entries <= 0) { 3051 panic("xpt_run_dev_allocq: " 3052 "Device on queue without any work to do"); 3053 } 3054 #endif 3055 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3056 devq->alloc_openings--; 3057 devq->alloc_active++; 3058 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3059 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3060 drv->pinfo.priority); 3061 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3062 ("calling periph start\n")); 3063 drv->periph_start(drv, work_ccb); 3064 } else { 3065 /* 3066 * Malloc failure in alloc_ccb 3067 */ 3068 /* 3069 * XXX add us to a list to be run from free_ccb 3070 * if we don't have any ccbs active on this 3071 * device queue otherwise we may never get run 3072 * again. 3073 */ 3074 break; 3075 } 3076 3077 /* We may have more work. Attempt to reschedule. */ 3078 xpt_schedule_dev_allocq(bus, device); 3079 } 3080 devq->alloc_queue.qfrozen_cnt[0]--; 3081 } 3082 3083 static void 3084 xpt_run_dev_sendq(struct cam_eb *bus) 3085 { 3086 struct cam_devq *devq; 3087 3088 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3089 3090 devq = bus->sim->devq; 3091 3092 devq->send_queue.qfrozen_cnt[0]++; 3093 while ((devq->send_queue.entries > 0) 3094 && (devq->send_openings > 0) 3095 && (devq->send_queue.qfrozen_cnt[0] <= 1)) { 3096 struct cam_ed_qinfo *qinfo; 3097 struct cam_ed *device; 3098 union ccb *work_ccb; 3099 struct cam_sim *sim; 3100 3101 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3102 CAMQ_HEAD); 3103 device = qinfo->device; 3104 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3105 ("running device %p\n", device)); 3106 3107 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3108 if (work_ccb == NULL) { 3109 printf("device on run queue with no ccbs???\n"); 3110 continue; 3111 } 3112 3113 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3114 3115 mtx_lock(&xsoftc.xpt_lock); 3116 if (xsoftc.num_highpower <= 0) { 3117 /* 3118 * We got a high power command, but we 3119 * don't have any available slots. Freeze 3120 * the device queue until we have a slot 3121 * available. 3122 */ 3123 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3124 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3125 &work_ccb->ccb_h, 3126 xpt_links.stqe); 3127 3128 mtx_unlock(&xsoftc.xpt_lock); 3129 continue; 3130 } else { 3131 /* 3132 * Consume a high power slot while 3133 * this ccb runs. 3134 */ 3135 xsoftc.num_highpower--; 3136 } 3137 mtx_unlock(&xsoftc.xpt_lock); 3138 } 3139 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3140 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3141 3142 devq->send_openings--; 3143 devq->send_active++; 3144 3145 xpt_schedule_dev_sendq(bus, device); 3146 3147 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3148 /* 3149 * The client wants to freeze the queue 3150 * after this CCB is sent. 3151 */ 3152 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3153 } 3154 3155 /* In Target mode, the peripheral driver knows best... */ 3156 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3157 if ((device->inq_flags & SID_CmdQue) != 0 3158 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3159 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3160 else 3161 /* 3162 * Clear this in case of a retried CCB that 3163 * failed due to a rejected tag. 3164 */ 3165 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3166 } 3167 3168 /* 3169 * Device queues can be shared among multiple sim instances 3170 * that reside on different busses. Use the SIM in the queue 3171 * CCB's path, rather than the one in the bus that was passed 3172 * into this function. 3173 */ 3174 sim = work_ccb->ccb_h.path->bus->sim; 3175 (*(sim->sim_action))(sim, work_ccb); 3176 } 3177 devq->send_queue.qfrozen_cnt[0]--; 3178 } 3179 3180 /* 3181 * This function merges stuff from the slave ccb into the master ccb, while 3182 * keeping important fields in the master ccb constant. 3183 */ 3184 void 3185 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3186 { 3187 3188 /* 3189 * Pull fields that are valid for peripheral drivers to set 3190 * into the master CCB along with the CCB "payload". 3191 */ 3192 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3193 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3194 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3195 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3196 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3197 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3198 } 3199 3200 void 3201 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3202 { 3203 3204 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3205 ccb_h->pinfo.priority = priority; 3206 ccb_h->path = path; 3207 ccb_h->path_id = path->bus->path_id; 3208 if (path->target) 3209 ccb_h->target_id = path->target->target_id; 3210 else 3211 ccb_h->target_id = CAM_TARGET_WILDCARD; 3212 if (path->device) { 3213 ccb_h->target_lun = path->device->lun_id; 3214 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3215 } else { 3216 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3217 } 3218 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3219 ccb_h->flags = 0; 3220 } 3221 3222 /* Path manipulation functions */ 3223 cam_status 3224 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3225 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3226 { 3227 struct cam_path *path; 3228 cam_status status; 3229 3230 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3231 3232 if (path == NULL) { 3233 status = CAM_RESRC_UNAVAIL; 3234 return(status); 3235 } 3236 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3237 if (status != CAM_REQ_CMP) { 3238 free(path, M_CAMXPT); 3239 path = NULL; 3240 } 3241 *new_path_ptr = path; 3242 return (status); 3243 } 3244 3245 cam_status 3246 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3247 struct cam_periph *periph, path_id_t path_id, 3248 target_id_t target_id, lun_id_t lun_id) 3249 { 3250 struct cam_path *path; 3251 struct cam_eb *bus = NULL; 3252 cam_status status; 3253 int need_unlock = 0; 3254 3255 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3256 3257 if (path_id != CAM_BUS_WILDCARD) { 3258 bus = xpt_find_bus(path_id); 3259 if (bus != NULL) { 3260 need_unlock = 1; 3261 CAM_SIM_LOCK(bus->sim); 3262 } 3263 } 3264 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3265 if (need_unlock) 3266 CAM_SIM_UNLOCK(bus->sim); 3267 if (status != CAM_REQ_CMP) { 3268 free(path, M_CAMXPT); 3269 path = NULL; 3270 } 3271 *new_path_ptr = path; 3272 return (status); 3273 } 3274 3275 cam_status 3276 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3277 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3278 { 3279 struct cam_eb *bus; 3280 struct cam_et *target; 3281 struct cam_ed *device; 3282 cam_status status; 3283 3284 status = CAM_REQ_CMP; /* Completed without error */ 3285 target = NULL; /* Wildcarded */ 3286 device = NULL; /* Wildcarded */ 3287 3288 /* 3289 * We will potentially modify the EDT, so block interrupts 3290 * that may attempt to create cam paths. 3291 */ 3292 bus = xpt_find_bus(path_id); 3293 if (bus == NULL) { 3294 status = CAM_PATH_INVALID; 3295 } else { 3296 target = xpt_find_target(bus, target_id); 3297 if (target == NULL) { 3298 /* Create one */ 3299 struct cam_et *new_target; 3300 3301 new_target = xpt_alloc_target(bus, target_id); 3302 if (new_target == NULL) { 3303 status = CAM_RESRC_UNAVAIL; 3304 } else { 3305 target = new_target; 3306 } 3307 } 3308 if (target != NULL) { 3309 device = xpt_find_device(target, lun_id); 3310 if (device == NULL) { 3311 /* Create one */ 3312 struct cam_ed *new_device; 3313 3314 new_device = 3315 (*(bus->xport->alloc_device))(bus, 3316 target, 3317 lun_id); 3318 if (new_device == NULL) { 3319 status = CAM_RESRC_UNAVAIL; 3320 } else { 3321 device = new_device; 3322 } 3323 } 3324 } 3325 } 3326 3327 /* 3328 * Only touch the user's data if we are successful. 3329 */ 3330 if (status == CAM_REQ_CMP) { 3331 new_path->periph = perph; 3332 new_path->bus = bus; 3333 new_path->target = target; 3334 new_path->device = device; 3335 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3336 } else { 3337 if (device != NULL) 3338 xpt_release_device(device); 3339 if (target != NULL) 3340 xpt_release_target(target); 3341 if (bus != NULL) 3342 xpt_release_bus(bus); 3343 } 3344 return (status); 3345 } 3346 3347 void 3348 xpt_release_path(struct cam_path *path) 3349 { 3350 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3351 if (path->device != NULL) { 3352 xpt_release_device(path->device); 3353 path->device = NULL; 3354 } 3355 if (path->target != NULL) { 3356 xpt_release_target(path->target); 3357 path->target = NULL; 3358 } 3359 if (path->bus != NULL) { 3360 xpt_release_bus(path->bus); 3361 path->bus = NULL; 3362 } 3363 } 3364 3365 void 3366 xpt_free_path(struct cam_path *path) 3367 { 3368 3369 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3370 xpt_release_path(path); 3371 free(path, M_CAMXPT); 3372 } 3373 3374 3375 /* 3376 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3377 * in path1, 2 for match with wildcards in path2. 3378 */ 3379 int 3380 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3381 { 3382 int retval = 0; 3383 3384 if (path1->bus != path2->bus) { 3385 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3386 retval = 1; 3387 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3388 retval = 2; 3389 else 3390 return (-1); 3391 } 3392 if (path1->target != path2->target) { 3393 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3394 if (retval == 0) 3395 retval = 1; 3396 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3397 retval = 2; 3398 else 3399 return (-1); 3400 } 3401 if (path1->device != path2->device) { 3402 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3403 if (retval == 0) 3404 retval = 1; 3405 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3406 retval = 2; 3407 else 3408 return (-1); 3409 } 3410 return (retval); 3411 } 3412 3413 void 3414 xpt_print_path(struct cam_path *path) 3415 { 3416 3417 if (path == NULL) 3418 printf("(nopath): "); 3419 else { 3420 if (path->periph != NULL) 3421 printf("(%s%d:", path->periph->periph_name, 3422 path->periph->unit_number); 3423 else 3424 printf("(noperiph:"); 3425 3426 if (path->bus != NULL) 3427 printf("%s%d:%d:", path->bus->sim->sim_name, 3428 path->bus->sim->unit_number, 3429 path->bus->sim->bus_id); 3430 else 3431 printf("nobus:"); 3432 3433 if (path->target != NULL) 3434 printf("%d:", path->target->target_id); 3435 else 3436 printf("X:"); 3437 3438 if (path->device != NULL) 3439 printf("%d): ", path->device->lun_id); 3440 else 3441 printf("X): "); 3442 } 3443 } 3444 3445 void 3446 xpt_print(struct cam_path *path, const char *fmt, ...) 3447 { 3448 va_list ap; 3449 xpt_print_path(path); 3450 va_start(ap, fmt); 3451 vprintf(fmt, ap); 3452 va_end(ap); 3453 } 3454 3455 int 3456 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3457 { 3458 struct sbuf sb; 3459 3460 #ifdef INVARIANTS 3461 if (path != NULL && path->bus != NULL) 3462 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3463 #endif 3464 3465 sbuf_new(&sb, str, str_len, 0); 3466 3467 if (path == NULL) 3468 sbuf_printf(&sb, "(nopath): "); 3469 else { 3470 if (path->periph != NULL) 3471 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3472 path->periph->unit_number); 3473 else 3474 sbuf_printf(&sb, "(noperiph:"); 3475 3476 if (path->bus != NULL) 3477 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3478 path->bus->sim->unit_number, 3479 path->bus->sim->bus_id); 3480 else 3481 sbuf_printf(&sb, "nobus:"); 3482 3483 if (path->target != NULL) 3484 sbuf_printf(&sb, "%d:", path->target->target_id); 3485 else 3486 sbuf_printf(&sb, "X:"); 3487 3488 if (path->device != NULL) 3489 sbuf_printf(&sb, "%d): ", path->device->lun_id); 3490 else 3491 sbuf_printf(&sb, "X): "); 3492 } 3493 sbuf_finish(&sb); 3494 3495 return(sbuf_len(&sb)); 3496 } 3497 3498 path_id_t 3499 xpt_path_path_id(struct cam_path *path) 3500 { 3501 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3502 3503 return(path->bus->path_id); 3504 } 3505 3506 target_id_t 3507 xpt_path_target_id(struct cam_path *path) 3508 { 3509 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3510 3511 if (path->target != NULL) 3512 return (path->target->target_id); 3513 else 3514 return (CAM_TARGET_WILDCARD); 3515 } 3516 3517 lun_id_t 3518 xpt_path_lun_id(struct cam_path *path) 3519 { 3520 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3521 3522 if (path->device != NULL) 3523 return (path->device->lun_id); 3524 else 3525 return (CAM_LUN_WILDCARD); 3526 } 3527 3528 struct cam_sim * 3529 xpt_path_sim(struct cam_path *path) 3530 { 3531 3532 return (path->bus->sim); 3533 } 3534 3535 struct cam_periph* 3536 xpt_path_periph(struct cam_path *path) 3537 { 3538 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3539 3540 return (path->periph); 3541 } 3542 3543 /* 3544 * Release a CAM control block for the caller. Remit the cost of the structure 3545 * to the device referenced by the path. If the this device had no 'credits' 3546 * and peripheral drivers have registered async callbacks for this notification 3547 * call them now. 3548 */ 3549 void 3550 xpt_release_ccb(union ccb *free_ccb) 3551 { 3552 struct cam_path *path; 3553 struct cam_ed *device; 3554 struct cam_eb *bus; 3555 struct cam_sim *sim; 3556 3557 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3558 path = free_ccb->ccb_h.path; 3559 device = path->device; 3560 bus = path->bus; 3561 sim = bus->sim; 3562 3563 mtx_assert(sim->mtx, MA_OWNED); 3564 3565 cam_ccbq_release_opening(&device->ccbq); 3566 if (device->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) { 3567 device->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 3568 cam_ccbq_resize(&device->ccbq, 3569 device->ccbq.dev_openings + device->ccbq.dev_active); 3570 } 3571 if (sim->ccb_count > sim->max_ccbs) { 3572 xpt_free_ccb(free_ccb); 3573 sim->ccb_count--; 3574 } else { 3575 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 3576 xpt_links.sle); 3577 } 3578 if (sim->devq == NULL) { 3579 return; 3580 } 3581 sim->devq->alloc_openings++; 3582 sim->devq->alloc_active--; 3583 if (device_is_alloc_queued(device) == 0) 3584 xpt_schedule_dev_allocq(bus, device); 3585 xpt_run_dev_allocq(bus); 3586 } 3587 3588 /* Functions accessed by SIM drivers */ 3589 3590 static struct xpt_xport xport_default = { 3591 .alloc_device = xpt_alloc_device_default, 3592 .action = xpt_action_default, 3593 .async = xpt_dev_async_default, 3594 }; 3595 3596 /* 3597 * A sim structure, listing the SIM entry points and instance 3598 * identification info is passed to xpt_bus_register to hook the SIM 3599 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3600 * for this new bus and places it in the array of busses and assigns 3601 * it a path_id. The path_id may be influenced by "hard wiring" 3602 * information specified by the user. Once interrupt services are 3603 * available, the bus will be probed. 3604 */ 3605 int32_t 3606 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3607 { 3608 struct cam_eb *new_bus; 3609 struct cam_eb *old_bus; 3610 struct ccb_pathinq cpi; 3611 struct cam_path *path; 3612 cam_status status; 3613 3614 mtx_assert(sim->mtx, MA_OWNED); 3615 3616 sim->bus_id = bus; 3617 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3618 M_CAMXPT, M_NOWAIT); 3619 if (new_bus == NULL) { 3620 /* Couldn't satisfy request */ 3621 return (CAM_RESRC_UNAVAIL); 3622 } 3623 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3624 if (path == NULL) { 3625 free(new_bus, M_CAMXPT); 3626 return (CAM_RESRC_UNAVAIL); 3627 } 3628 3629 if (strcmp(sim->sim_name, "xpt") != 0) { 3630 sim->path_id = 3631 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3632 } 3633 3634 TAILQ_INIT(&new_bus->et_entries); 3635 new_bus->path_id = sim->path_id; 3636 cam_sim_hold(sim); 3637 new_bus->sim = sim; 3638 timevalclear(&new_bus->last_reset); 3639 new_bus->flags = 0; 3640 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3641 new_bus->generation = 0; 3642 3643 mtx_lock(&xsoftc.xpt_topo_lock); 3644 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3645 while (old_bus != NULL 3646 && old_bus->path_id < new_bus->path_id) 3647 old_bus = TAILQ_NEXT(old_bus, links); 3648 if (old_bus != NULL) 3649 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3650 else 3651 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3652 xsoftc.bus_generation++; 3653 mtx_unlock(&xsoftc.xpt_topo_lock); 3654 3655 /* 3656 * Set a default transport so that a PATH_INQ can be issued to 3657 * the SIM. This will then allow for probing and attaching of 3658 * a more appropriate transport. 3659 */ 3660 new_bus->xport = &xport_default; 3661 3662 status = xpt_compile_path(path, /*periph*/NULL, sim->path_id, 3663 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3664 if (status != CAM_REQ_CMP) 3665 printf("xpt_compile_path returned %d\n", status); 3666 3667 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3668 cpi.ccb_h.func_code = XPT_PATH_INQ; 3669 xpt_action((union ccb *)&cpi); 3670 3671 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3672 switch (cpi.transport) { 3673 case XPORT_SPI: 3674 case XPORT_SAS: 3675 case XPORT_FC: 3676 case XPORT_USB: 3677 case XPORT_ISCSI: 3678 case XPORT_PPB: 3679 new_bus->xport = scsi_get_xport(); 3680 break; 3681 case XPORT_ATA: 3682 case XPORT_SATA: 3683 new_bus->xport = ata_get_xport(); 3684 break; 3685 default: 3686 new_bus->xport = &xport_default; 3687 break; 3688 } 3689 } 3690 3691 /* Notify interested parties */ 3692 if (sim->path_id != CAM_XPT_PATH_ID) { 3693 union ccb *scan_ccb; 3694 3695 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3696 /* Initiate bus rescan. */ 3697 scan_ccb = xpt_alloc_ccb_nowait(); 3698 scan_ccb->ccb_h.path = path; 3699 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3700 scan_ccb->crcn.flags = 0; 3701 xpt_rescan(scan_ccb); 3702 } else 3703 xpt_free_path(path); 3704 return (CAM_SUCCESS); 3705 } 3706 3707 int32_t 3708 xpt_bus_deregister(path_id_t pathid) 3709 { 3710 struct cam_path bus_path; 3711 cam_status status; 3712 3713 status = xpt_compile_path(&bus_path, NULL, pathid, 3714 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3715 if (status != CAM_REQ_CMP) 3716 return (status); 3717 3718 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3719 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3720 3721 /* Release the reference count held while registered. */ 3722 xpt_release_bus(bus_path.bus); 3723 xpt_release_path(&bus_path); 3724 3725 return (CAM_REQ_CMP); 3726 } 3727 3728 static path_id_t 3729 xptnextfreepathid(void) 3730 { 3731 struct cam_eb *bus; 3732 path_id_t pathid; 3733 const char *strval; 3734 3735 pathid = 0; 3736 mtx_lock(&xsoftc.xpt_topo_lock); 3737 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3738 retry: 3739 /* Find an unoccupied pathid */ 3740 while (bus != NULL && bus->path_id <= pathid) { 3741 if (bus->path_id == pathid) 3742 pathid++; 3743 bus = TAILQ_NEXT(bus, links); 3744 } 3745 mtx_unlock(&xsoftc.xpt_topo_lock); 3746 3747 /* 3748 * Ensure that this pathid is not reserved for 3749 * a bus that may be registered in the future. 3750 */ 3751 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3752 ++pathid; 3753 /* Start the search over */ 3754 mtx_lock(&xsoftc.xpt_topo_lock); 3755 goto retry; 3756 } 3757 return (pathid); 3758 } 3759 3760 static path_id_t 3761 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3762 { 3763 path_id_t pathid; 3764 int i, dunit, val; 3765 char buf[32]; 3766 const char *dname; 3767 3768 pathid = CAM_XPT_PATH_ID; 3769 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3770 i = 0; 3771 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 3772 if (strcmp(dname, "scbus")) { 3773 /* Avoid a bit of foot shooting. */ 3774 continue; 3775 } 3776 if (dunit < 0) /* unwired?! */ 3777 continue; 3778 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 3779 if (sim_bus == val) { 3780 pathid = dunit; 3781 break; 3782 } 3783 } else if (sim_bus == 0) { 3784 /* Unspecified matches bus 0 */ 3785 pathid = dunit; 3786 break; 3787 } else { 3788 printf("Ambiguous scbus configuration for %s%d " 3789 "bus %d, cannot wire down. The kernel " 3790 "config entry for scbus%d should " 3791 "specify a controller bus.\n" 3792 "Scbus will be assigned dynamically.\n", 3793 sim_name, sim_unit, sim_bus, dunit); 3794 break; 3795 } 3796 } 3797 3798 if (pathid == CAM_XPT_PATH_ID) 3799 pathid = xptnextfreepathid(); 3800 return (pathid); 3801 } 3802 3803 void 3804 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 3805 { 3806 struct cam_eb *bus; 3807 struct cam_et *target, *next_target; 3808 struct cam_ed *device, *next_device; 3809 3810 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3811 3812 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 3813 3814 /* 3815 * Most async events come from a CAM interrupt context. In 3816 * a few cases, the error recovery code at the peripheral layer, 3817 * which may run from our SWI or a process context, may signal 3818 * deferred events with a call to xpt_async. 3819 */ 3820 3821 bus = path->bus; 3822 3823 if (async_code == AC_BUS_RESET) { 3824 /* Update our notion of when the last reset occurred */ 3825 microtime(&bus->last_reset); 3826 } 3827 3828 for (target = TAILQ_FIRST(&bus->et_entries); 3829 target != NULL; 3830 target = next_target) { 3831 3832 next_target = TAILQ_NEXT(target, links); 3833 3834 if (path->target != target 3835 && path->target->target_id != CAM_TARGET_WILDCARD 3836 && target->target_id != CAM_TARGET_WILDCARD) 3837 continue; 3838 3839 if (async_code == AC_SENT_BDR) { 3840 /* Update our notion of when the last reset occurred */ 3841 microtime(&path->target->last_reset); 3842 } 3843 3844 for (device = TAILQ_FIRST(&target->ed_entries); 3845 device != NULL; 3846 device = next_device) { 3847 3848 next_device = TAILQ_NEXT(device, links); 3849 3850 if (path->device != device 3851 && path->device->lun_id != CAM_LUN_WILDCARD 3852 && device->lun_id != CAM_LUN_WILDCARD) 3853 continue; 3854 /* 3855 * The async callback could free the device. 3856 * If it is a broadcast async, it doesn't hold 3857 * device reference, so take our own reference. 3858 */ 3859 xpt_acquire_device(device); 3860 (*(bus->xport->async))(async_code, bus, 3861 target, device, 3862 async_arg); 3863 3864 xpt_async_bcast(&device->asyncs, async_code, 3865 path, async_arg); 3866 xpt_release_device(device); 3867 } 3868 } 3869 3870 /* 3871 * If this wasn't a fully wildcarded async, tell all 3872 * clients that want all async events. 3873 */ 3874 if (bus != xpt_periph->path->bus) 3875 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 3876 path, async_arg); 3877 } 3878 3879 static void 3880 xpt_async_bcast(struct async_list *async_head, 3881 u_int32_t async_code, 3882 struct cam_path *path, void *async_arg) 3883 { 3884 struct async_node *cur_entry; 3885 3886 cur_entry = SLIST_FIRST(async_head); 3887 while (cur_entry != NULL) { 3888 struct async_node *next_entry; 3889 /* 3890 * Grab the next list entry before we call the current 3891 * entry's callback. This is because the callback function 3892 * can delete its async callback entry. 3893 */ 3894 next_entry = SLIST_NEXT(cur_entry, links); 3895 if ((cur_entry->event_enable & async_code) != 0) 3896 cur_entry->callback(cur_entry->callback_arg, 3897 async_code, path, 3898 async_arg); 3899 cur_entry = next_entry; 3900 } 3901 } 3902 3903 static void 3904 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 3905 struct cam_et *target, struct cam_ed *device, 3906 void *async_arg) 3907 { 3908 printf("%s called\n", __func__); 3909 } 3910 3911 u_int32_t 3912 xpt_freeze_devq_rl(struct cam_path *path, cam_rl rl, u_int count) 3913 { 3914 struct cam_ed *dev = path->device; 3915 3916 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3917 dev->sim->devq->alloc_openings += 3918 cam_ccbq_freeze(&dev->ccbq, rl, count); 3919 /* Remove frozen device from allocq. */ 3920 if (device_is_alloc_queued(dev) && 3921 cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 3922 CAMQ_GET_PRIO(&dev->drvq)))) { 3923 camq_remove(&dev->sim->devq->alloc_queue, 3924 dev->alloc_ccb_entry.pinfo.index); 3925 } 3926 /* Remove frozen device from sendq. */ 3927 if (device_is_send_queued(dev) && 3928 cam_ccbq_frozen_top(&dev->ccbq)) { 3929 camq_remove(&dev->sim->devq->send_queue, 3930 dev->send_ccb_entry.pinfo.index); 3931 } 3932 return (dev->ccbq.queue.qfrozen_cnt[rl]); 3933 } 3934 3935 u_int32_t 3936 xpt_freeze_devq(struct cam_path *path, u_int count) 3937 { 3938 3939 return (xpt_freeze_devq_rl(path, 0, count)); 3940 } 3941 3942 u_int32_t 3943 xpt_freeze_simq(struct cam_sim *sim, u_int count) 3944 { 3945 3946 mtx_assert(sim->mtx, MA_OWNED); 3947 sim->devq->send_queue.qfrozen_cnt[0] += count; 3948 return (sim->devq->send_queue.qfrozen_cnt[0]); 3949 } 3950 3951 static void 3952 xpt_release_devq_timeout(void *arg) 3953 { 3954 struct cam_ed *device; 3955 3956 device = (struct cam_ed *)arg; 3957 3958 xpt_release_devq_device(device, /*rl*/0, /*count*/1, /*run_queue*/TRUE); 3959 } 3960 3961 void 3962 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 3963 { 3964 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3965 3966 xpt_release_devq_device(path->device, /*rl*/0, count, run_queue); 3967 } 3968 3969 void 3970 xpt_release_devq_rl(struct cam_path *path, cam_rl rl, u_int count, int run_queue) 3971 { 3972 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3973 3974 xpt_release_devq_device(path->device, rl, count, run_queue); 3975 } 3976 3977 static void 3978 xpt_release_devq_device(struct cam_ed *dev, cam_rl rl, u_int count, int run_queue) 3979 { 3980 3981 if (count > dev->ccbq.queue.qfrozen_cnt[rl]) { 3982 #ifdef INVARIANTS 3983 printf("xpt_release_devq(%d): requested %u > present %u\n", 3984 rl, count, dev->ccbq.queue.qfrozen_cnt[rl]); 3985 #endif 3986 count = dev->ccbq.queue.qfrozen_cnt[rl]; 3987 } 3988 dev->sim->devq->alloc_openings -= 3989 cam_ccbq_release(&dev->ccbq, rl, count); 3990 if (cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 3991 CAMQ_GET_PRIO(&dev->drvq))) == 0) { 3992 if (xpt_schedule_dev_allocq(dev->target->bus, dev)) 3993 xpt_run_dev_allocq(dev->target->bus); 3994 } 3995 if (cam_ccbq_frozen_top(&dev->ccbq) == 0) { 3996 /* 3997 * No longer need to wait for a successful 3998 * command completion. 3999 */ 4000 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4001 /* 4002 * Remove any timeouts that might be scheduled 4003 * to release this queue. 4004 */ 4005 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4006 callout_stop(&dev->callout); 4007 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4008 } 4009 if (run_queue == 0) 4010 return; 4011 /* 4012 * Now that we are unfrozen schedule the 4013 * device so any pending transactions are 4014 * run. 4015 */ 4016 if (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4017 xpt_run_dev_sendq(dev->target->bus); 4018 } 4019 } 4020 4021 void 4022 xpt_release_simq(struct cam_sim *sim, int run_queue) 4023 { 4024 struct camq *sendq; 4025 4026 mtx_assert(sim->mtx, MA_OWNED); 4027 sendq = &(sim->devq->send_queue); 4028 if (sendq->qfrozen_cnt[0] <= 0) { 4029 #ifdef INVARIANTS 4030 printf("xpt_release_simq: requested 1 > present %u\n", 4031 sendq->qfrozen_cnt[0]); 4032 #endif 4033 } else 4034 sendq->qfrozen_cnt[0]--; 4035 if (sendq->qfrozen_cnt[0] == 0) { 4036 /* 4037 * If there is a timeout scheduled to release this 4038 * sim queue, remove it. The queue frozen count is 4039 * already at 0. 4040 */ 4041 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4042 callout_stop(&sim->callout); 4043 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4044 } 4045 if (run_queue) { 4046 struct cam_eb *bus; 4047 4048 /* 4049 * Now that we are unfrozen run the send queue. 4050 */ 4051 bus = xpt_find_bus(sim->path_id); 4052 xpt_run_dev_sendq(bus); 4053 xpt_release_bus(bus); 4054 } 4055 } 4056 } 4057 4058 /* 4059 * XXX Appears to be unused. 4060 */ 4061 static void 4062 xpt_release_simq_timeout(void *arg) 4063 { 4064 struct cam_sim *sim; 4065 4066 sim = (struct cam_sim *)arg; 4067 xpt_release_simq(sim, /* run_queue */ TRUE); 4068 } 4069 4070 void 4071 xpt_done(union ccb *done_ccb) 4072 { 4073 struct cam_sim *sim; 4074 int first; 4075 4076 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4077 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4078 /* 4079 * Queue up the request for handling by our SWI handler 4080 * any of the "non-immediate" type of ccbs. 4081 */ 4082 sim = done_ccb->ccb_h.path->bus->sim; 4083 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4084 sim_links.tqe); 4085 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4086 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4087 mtx_lock(&cam_simq_lock); 4088 first = TAILQ_EMPTY(&cam_simq); 4089 TAILQ_INSERT_TAIL(&cam_simq, sim, links); 4090 mtx_unlock(&cam_simq_lock); 4091 sim->flags |= CAM_SIM_ON_DONEQ; 4092 if (first) 4093 swi_sched(cambio_ih, 0); 4094 } 4095 } 4096 } 4097 4098 union ccb * 4099 xpt_alloc_ccb() 4100 { 4101 union ccb *new_ccb; 4102 4103 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK); 4104 return (new_ccb); 4105 } 4106 4107 union ccb * 4108 xpt_alloc_ccb_nowait() 4109 { 4110 union ccb *new_ccb; 4111 4112 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT); 4113 return (new_ccb); 4114 } 4115 4116 void 4117 xpt_free_ccb(union ccb *free_ccb) 4118 { 4119 free(free_ccb, M_CAMXPT); 4120 } 4121 4122 4123 4124 /* Private XPT functions */ 4125 4126 /* 4127 * Get a CAM control block for the caller. Charge the structure to the device 4128 * referenced by the path. If the this device has no 'credits' then the 4129 * device already has the maximum number of outstanding operations under way 4130 * and we return NULL. If we don't have sufficient resources to allocate more 4131 * ccbs, we also return NULL. 4132 */ 4133 static union ccb * 4134 xpt_get_ccb(struct cam_ed *device) 4135 { 4136 union ccb *new_ccb; 4137 struct cam_sim *sim; 4138 4139 sim = device->sim; 4140 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4141 new_ccb = xpt_alloc_ccb_nowait(); 4142 if (new_ccb == NULL) { 4143 return (NULL); 4144 } 4145 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4146 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4147 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4148 xpt_links.sle); 4149 sim->ccb_count++; 4150 } 4151 cam_ccbq_take_opening(&device->ccbq); 4152 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4153 return (new_ccb); 4154 } 4155 4156 static void 4157 xpt_release_bus(struct cam_eb *bus) 4158 { 4159 4160 if ((--bus->refcount == 0) 4161 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4162 mtx_lock(&xsoftc.xpt_topo_lock); 4163 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4164 xsoftc.bus_generation++; 4165 mtx_unlock(&xsoftc.xpt_topo_lock); 4166 cam_sim_release(bus->sim); 4167 free(bus, M_CAMXPT); 4168 } 4169 } 4170 4171 static struct cam_et * 4172 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4173 { 4174 struct cam_et *target; 4175 4176 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT); 4177 if (target != NULL) { 4178 struct cam_et *cur_target; 4179 4180 TAILQ_INIT(&target->ed_entries); 4181 target->bus = bus; 4182 target->target_id = target_id; 4183 target->refcount = 1; 4184 target->generation = 0; 4185 timevalclear(&target->last_reset); 4186 /* 4187 * Hold a reference to our parent bus so it 4188 * will not go away before we do. 4189 */ 4190 bus->refcount++; 4191 4192 /* Insertion sort into our bus's target list */ 4193 cur_target = TAILQ_FIRST(&bus->et_entries); 4194 while (cur_target != NULL && cur_target->target_id < target_id) 4195 cur_target = TAILQ_NEXT(cur_target, links); 4196 4197 if (cur_target != NULL) { 4198 TAILQ_INSERT_BEFORE(cur_target, target, links); 4199 } else { 4200 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4201 } 4202 bus->generation++; 4203 } 4204 return (target); 4205 } 4206 4207 static void 4208 xpt_release_target(struct cam_et *target) 4209 { 4210 4211 if ((--target->refcount == 0) 4212 && (TAILQ_FIRST(&target->ed_entries) == NULL)) { 4213 TAILQ_REMOVE(&target->bus->et_entries, target, links); 4214 target->bus->generation++; 4215 xpt_release_bus(target->bus); 4216 free(target, M_CAMXPT); 4217 } 4218 } 4219 4220 static struct cam_ed * 4221 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4222 lun_id_t lun_id) 4223 { 4224 struct cam_ed *device, *cur_device; 4225 4226 device = xpt_alloc_device(bus, target, lun_id); 4227 if (device == NULL) 4228 return (NULL); 4229 4230 device->mintags = 1; 4231 device->maxtags = 1; 4232 bus->sim->max_ccbs += device->ccbq.devq_openings; 4233 cur_device = TAILQ_FIRST(&target->ed_entries); 4234 while (cur_device != NULL && cur_device->lun_id < lun_id) 4235 cur_device = TAILQ_NEXT(cur_device, links); 4236 if (cur_device != NULL) { 4237 TAILQ_INSERT_BEFORE(cur_device, device, links); 4238 } else { 4239 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4240 } 4241 target->generation++; 4242 4243 return (device); 4244 } 4245 4246 struct cam_ed * 4247 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4248 { 4249 struct cam_ed *device; 4250 struct cam_devq *devq; 4251 cam_status status; 4252 4253 /* Make space for us in the device queue on our bus */ 4254 devq = bus->sim->devq; 4255 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4256 4257 if (status != CAM_REQ_CMP) { 4258 device = NULL; 4259 } else { 4260 device = (struct cam_ed *)malloc(sizeof(*device), 4261 M_CAMXPT, M_NOWAIT); 4262 } 4263 4264 if (device != NULL) { 4265 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4266 device->alloc_ccb_entry.device = device; 4267 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4268 device->send_ccb_entry.device = device; 4269 device->target = target; 4270 device->lun_id = lun_id; 4271 device->sim = bus->sim; 4272 /* Initialize our queues */ 4273 if (camq_init(&device->drvq, 0) != 0) { 4274 free(device, M_CAMXPT); 4275 return (NULL); 4276 } 4277 if (cam_ccbq_init(&device->ccbq, 4278 bus->sim->max_dev_openings) != 0) { 4279 camq_fini(&device->drvq); 4280 free(device, M_CAMXPT); 4281 return (NULL); 4282 } 4283 SLIST_INIT(&device->asyncs); 4284 SLIST_INIT(&device->periphs); 4285 device->generation = 0; 4286 device->owner = NULL; 4287 device->flags = CAM_DEV_UNCONFIGURED; 4288 device->tag_delay_count = 0; 4289 device->tag_saved_openings = 0; 4290 device->refcount = 1; 4291 callout_init_mtx(&device->callout, bus->sim->mtx, 0); 4292 4293 /* 4294 * Hold a reference to our parent target so it 4295 * will not go away before we do. 4296 */ 4297 target->refcount++; 4298 4299 } 4300 return (device); 4301 } 4302 4303 void 4304 xpt_acquire_device(struct cam_ed *device) 4305 { 4306 4307 device->refcount++; 4308 } 4309 4310 void 4311 xpt_release_device(struct cam_ed *device) 4312 { 4313 4314 if (--device->refcount == 0) { 4315 struct cam_devq *devq; 4316 4317 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4318 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4319 panic("Removing device while still queued for ccbs"); 4320 4321 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4322 callout_stop(&device->callout); 4323 4324 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4325 device->target->generation++; 4326 device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings; 4327 /* Release our slot in the devq */ 4328 devq = device->target->bus->sim->devq; 4329 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4330 camq_fini(&device->drvq); 4331 cam_ccbq_fini(&device->ccbq); 4332 xpt_release_target(device->target); 4333 free(device, M_CAMXPT); 4334 } 4335 } 4336 4337 u_int32_t 4338 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4339 { 4340 int diff; 4341 int result; 4342 struct cam_ed *dev; 4343 4344 dev = path->device; 4345 4346 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4347 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4348 if (result == CAM_REQ_CMP && (diff < 0)) { 4349 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4350 } 4351 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4352 || (dev->inq_flags & SID_CmdQue) != 0) 4353 dev->tag_saved_openings = newopenings; 4354 /* Adjust the global limit */ 4355 dev->sim->max_ccbs += diff; 4356 return (result); 4357 } 4358 4359 static struct cam_eb * 4360 xpt_find_bus(path_id_t path_id) 4361 { 4362 struct cam_eb *bus; 4363 4364 mtx_lock(&xsoftc.xpt_topo_lock); 4365 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4366 bus != NULL; 4367 bus = TAILQ_NEXT(bus, links)) { 4368 if (bus->path_id == path_id) { 4369 bus->refcount++; 4370 break; 4371 } 4372 } 4373 mtx_unlock(&xsoftc.xpt_topo_lock); 4374 return (bus); 4375 } 4376 4377 static struct cam_et * 4378 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4379 { 4380 struct cam_et *target; 4381 4382 for (target = TAILQ_FIRST(&bus->et_entries); 4383 target != NULL; 4384 target = TAILQ_NEXT(target, links)) { 4385 if (target->target_id == target_id) { 4386 target->refcount++; 4387 break; 4388 } 4389 } 4390 return (target); 4391 } 4392 4393 static struct cam_ed * 4394 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4395 { 4396 struct cam_ed *device; 4397 4398 for (device = TAILQ_FIRST(&target->ed_entries); 4399 device != NULL; 4400 device = TAILQ_NEXT(device, links)) { 4401 if (device->lun_id == lun_id) { 4402 device->refcount++; 4403 break; 4404 } 4405 } 4406 return (device); 4407 } 4408 4409 void 4410 xpt_start_tags(struct cam_path *path) 4411 { 4412 struct ccb_relsim crs; 4413 struct cam_ed *device; 4414 struct cam_sim *sim; 4415 int newopenings; 4416 4417 device = path->device; 4418 sim = path->bus->sim; 4419 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4420 xpt_freeze_devq(path, /*count*/1); 4421 device->inq_flags |= SID_CmdQue; 4422 if (device->tag_saved_openings != 0) 4423 newopenings = device->tag_saved_openings; 4424 else 4425 newopenings = min(device->maxtags, 4426 sim->max_tagged_dev_openings); 4427 xpt_dev_ccbq_resize(path, newopenings); 4428 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4429 crs.ccb_h.func_code = XPT_REL_SIMQ; 4430 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4431 crs.openings 4432 = crs.release_timeout 4433 = crs.qfrozen_cnt 4434 = 0; 4435 xpt_action((union ccb *)&crs); 4436 } 4437 4438 void 4439 xpt_stop_tags(struct cam_path *path) 4440 { 4441 struct ccb_relsim crs; 4442 struct cam_ed *device; 4443 struct cam_sim *sim; 4444 4445 device = path->device; 4446 sim = path->bus->sim; 4447 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4448 device->tag_delay_count = 0; 4449 xpt_freeze_devq(path, /*count*/1); 4450 device->inq_flags &= ~SID_CmdQue; 4451 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4452 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4453 crs.ccb_h.func_code = XPT_REL_SIMQ; 4454 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4455 crs.openings 4456 = crs.release_timeout 4457 = crs.qfrozen_cnt 4458 = 0; 4459 xpt_action((union ccb *)&crs); 4460 } 4461 4462 static void 4463 xpt_boot_delay(void *arg) 4464 { 4465 4466 xpt_release_boot(); 4467 } 4468 4469 static void 4470 xpt_config(void *arg) 4471 { 4472 /* 4473 * Now that interrupts are enabled, go find our devices 4474 */ 4475 4476 #ifdef CAMDEBUG 4477 /* Setup debugging flags and path */ 4478 #ifdef CAM_DEBUG_FLAGS 4479 cam_dflags = CAM_DEBUG_FLAGS; 4480 #else /* !CAM_DEBUG_FLAGS */ 4481 cam_dflags = CAM_DEBUG_NONE; 4482 #endif /* CAM_DEBUG_FLAGS */ 4483 #ifdef CAM_DEBUG_BUS 4484 if (cam_dflags != CAM_DEBUG_NONE) { 4485 /* 4486 * Locking is specifically omitted here. No SIMs have 4487 * registered yet, so xpt_create_path will only be searching 4488 * empty lists of targets and devices. 4489 */ 4490 if (xpt_create_path(&cam_dpath, xpt_periph, 4491 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4492 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4493 printf("xpt_config: xpt_create_path() failed for debug" 4494 " target %d:%d:%d, debugging disabled\n", 4495 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4496 cam_dflags = CAM_DEBUG_NONE; 4497 } 4498 } else 4499 cam_dpath = NULL; 4500 #else /* !CAM_DEBUG_BUS */ 4501 cam_dpath = NULL; 4502 #endif /* CAM_DEBUG_BUS */ 4503 #endif /* CAMDEBUG */ 4504 4505 periphdriver_init(1); 4506 xpt_hold_boot(); 4507 callout_init(&xsoftc.boot_callout, 1); 4508 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000, 4509 xpt_boot_delay, NULL); 4510 /* Fire up rescan thread. */ 4511 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) { 4512 printf("xpt_init: failed to create rescan thread\n"); 4513 } 4514 } 4515 4516 void 4517 xpt_hold_boot(void) 4518 { 4519 xpt_lock_buses(); 4520 xsoftc.buses_to_config++; 4521 xpt_unlock_buses(); 4522 } 4523 4524 void 4525 xpt_release_boot(void) 4526 { 4527 xpt_lock_buses(); 4528 xsoftc.buses_to_config--; 4529 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 4530 struct xpt_task *task; 4531 4532 xsoftc.buses_config_done = 1; 4533 xpt_unlock_buses(); 4534 /* Call manually because we don't have any busses */ 4535 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4536 if (task != NULL) { 4537 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4538 taskqueue_enqueue(taskqueue_thread, &task->task); 4539 } 4540 } else 4541 xpt_unlock_buses(); 4542 } 4543 4544 /* 4545 * If the given device only has one peripheral attached to it, and if that 4546 * peripheral is the passthrough driver, announce it. This insures that the 4547 * user sees some sort of announcement for every peripheral in their system. 4548 */ 4549 static int 4550 xptpassannouncefunc(struct cam_ed *device, void *arg) 4551 { 4552 struct cam_periph *periph; 4553 int i; 4554 4555 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 4556 periph = SLIST_NEXT(periph, periph_links), i++); 4557 4558 periph = SLIST_FIRST(&device->periphs); 4559 if ((i == 1) 4560 && (strncmp(periph->periph_name, "pass", 4) == 0)) 4561 xpt_announce_periph(periph, NULL); 4562 4563 return(1); 4564 } 4565 4566 static void 4567 xpt_finishconfig_task(void *context, int pending) 4568 { 4569 4570 periphdriver_init(2); 4571 /* 4572 * Check for devices with no "standard" peripheral driver 4573 * attached. For any devices like that, announce the 4574 * passthrough driver so the user will see something. 4575 */ 4576 xpt_for_all_devices(xptpassannouncefunc, NULL); 4577 4578 /* Release our hook so that the boot can continue. */ 4579 config_intrhook_disestablish(xsoftc.xpt_config_hook); 4580 free(xsoftc.xpt_config_hook, M_CAMXPT); 4581 xsoftc.xpt_config_hook = NULL; 4582 4583 free(context, M_CAMXPT); 4584 } 4585 4586 cam_status 4587 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 4588 struct cam_path *path) 4589 { 4590 struct ccb_setasync csa; 4591 cam_status status; 4592 int xptpath = 0; 4593 4594 if (path == NULL) { 4595 mtx_lock(&xsoftc.xpt_lock); 4596 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 4597 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4598 if (status != CAM_REQ_CMP) { 4599 mtx_unlock(&xsoftc.xpt_lock); 4600 return (status); 4601 } 4602 xptpath = 1; 4603 } 4604 4605 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 4606 csa.ccb_h.func_code = XPT_SASYNC_CB; 4607 csa.event_enable = event; 4608 csa.callback = cbfunc; 4609 csa.callback_arg = cbarg; 4610 xpt_action((union ccb *)&csa); 4611 status = csa.ccb_h.status; 4612 if (xptpath) { 4613 xpt_free_path(path); 4614 mtx_unlock(&xsoftc.xpt_lock); 4615 4616 if ((status == CAM_REQ_CMP) && 4617 (csa.event_enable & AC_FOUND_DEVICE)) { 4618 /* 4619 * Get this peripheral up to date with all 4620 * the currently existing devices. 4621 */ 4622 xpt_for_all_devices(xptsetasyncfunc, &csa); 4623 } 4624 if ((status == CAM_REQ_CMP) && 4625 (csa.event_enable & AC_PATH_REGISTERED)) { 4626 /* 4627 * Get this peripheral up to date with all 4628 * the currently existing busses. 4629 */ 4630 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 4631 } 4632 } 4633 return (status); 4634 } 4635 4636 static void 4637 xptaction(struct cam_sim *sim, union ccb *work_ccb) 4638 { 4639 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 4640 4641 switch (work_ccb->ccb_h.func_code) { 4642 /* Common cases first */ 4643 case XPT_PATH_INQ: /* Path routing inquiry */ 4644 { 4645 struct ccb_pathinq *cpi; 4646 4647 cpi = &work_ccb->cpi; 4648 cpi->version_num = 1; /* XXX??? */ 4649 cpi->hba_inquiry = 0; 4650 cpi->target_sprt = 0; 4651 cpi->hba_misc = 0; 4652 cpi->hba_eng_cnt = 0; 4653 cpi->max_target = 0; 4654 cpi->max_lun = 0; 4655 cpi->initiator_id = 0; 4656 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 4657 strncpy(cpi->hba_vid, "", HBA_IDLEN); 4658 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 4659 cpi->unit_number = sim->unit_number; 4660 cpi->bus_id = sim->bus_id; 4661 cpi->base_transfer_speed = 0; 4662 cpi->protocol = PROTO_UNSPECIFIED; 4663 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 4664 cpi->transport = XPORT_UNSPECIFIED; 4665 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 4666 cpi->ccb_h.status = CAM_REQ_CMP; 4667 xpt_done(work_ccb); 4668 break; 4669 } 4670 default: 4671 work_ccb->ccb_h.status = CAM_REQ_INVALID; 4672 xpt_done(work_ccb); 4673 break; 4674 } 4675 } 4676 4677 /* 4678 * The xpt as a "controller" has no interrupt sources, so polling 4679 * is a no-op. 4680 */ 4681 static void 4682 xptpoll(struct cam_sim *sim) 4683 { 4684 } 4685 4686 void 4687 xpt_lock_buses(void) 4688 { 4689 mtx_lock(&xsoftc.xpt_topo_lock); 4690 } 4691 4692 void 4693 xpt_unlock_buses(void) 4694 { 4695 mtx_unlock(&xsoftc.xpt_topo_lock); 4696 } 4697 4698 static void 4699 camisr(void *dummy) 4700 { 4701 cam_simq_t queue; 4702 struct cam_sim *sim; 4703 4704 mtx_lock(&cam_simq_lock); 4705 TAILQ_INIT(&queue); 4706 while (!TAILQ_EMPTY(&cam_simq)) { 4707 TAILQ_CONCAT(&queue, &cam_simq, links); 4708 mtx_unlock(&cam_simq_lock); 4709 4710 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 4711 TAILQ_REMOVE(&queue, sim, links); 4712 CAM_SIM_LOCK(sim); 4713 sim->flags &= ~CAM_SIM_ON_DONEQ; 4714 camisr_runqueue(&sim->sim_doneq); 4715 CAM_SIM_UNLOCK(sim); 4716 } 4717 mtx_lock(&cam_simq_lock); 4718 } 4719 mtx_unlock(&cam_simq_lock); 4720 } 4721 4722 static void 4723 camisr_runqueue(void *V_queue) 4724 { 4725 cam_isrq_t *queue = V_queue; 4726 struct ccb_hdr *ccb_h; 4727 4728 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 4729 int runq; 4730 4731 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 4732 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 4733 4734 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 4735 ("camisr\n")); 4736 4737 runq = FALSE; 4738 4739 if (ccb_h->flags & CAM_HIGH_POWER) { 4740 struct highpowerlist *hphead; 4741 union ccb *send_ccb; 4742 4743 mtx_lock(&xsoftc.xpt_lock); 4744 hphead = &xsoftc.highpowerq; 4745 4746 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 4747 4748 /* 4749 * Increment the count since this command is done. 4750 */ 4751 xsoftc.num_highpower++; 4752 4753 /* 4754 * Any high powered commands queued up? 4755 */ 4756 if (send_ccb != NULL) { 4757 4758 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 4759 mtx_unlock(&xsoftc.xpt_lock); 4760 4761 xpt_release_devq(send_ccb->ccb_h.path, 4762 /*count*/1, /*runqueue*/TRUE); 4763 } else 4764 mtx_unlock(&xsoftc.xpt_lock); 4765 } 4766 4767 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 4768 struct cam_ed *dev; 4769 4770 dev = ccb_h->path->device; 4771 4772 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 4773 ccb_h->path->bus->sim->devq->send_active--; 4774 ccb_h->path->bus->sim->devq->send_openings++; 4775 runq = TRUE; 4776 4777 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 4778 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 4779 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 4780 && (dev->ccbq.dev_active == 0))) { 4781 xpt_release_devq(ccb_h->path, /*count*/1, 4782 /*run_queue*/FALSE); 4783 } 4784 4785 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4786 && (--dev->tag_delay_count == 0)) 4787 xpt_start_tags(ccb_h->path); 4788 if (!device_is_send_queued(dev)) 4789 xpt_schedule_dev_sendq(ccb_h->path->bus, dev); 4790 } 4791 4792 if (ccb_h->status & CAM_RELEASE_SIMQ) { 4793 xpt_release_simq(ccb_h->path->bus->sim, 4794 /*run_queue*/TRUE); 4795 ccb_h->status &= ~CAM_RELEASE_SIMQ; 4796 runq = FALSE; 4797 } 4798 4799 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 4800 && (ccb_h->status & CAM_DEV_QFRZN)) { 4801 xpt_release_devq(ccb_h->path, /*count*/1, 4802 /*run_queue*/TRUE); 4803 ccb_h->status &= ~CAM_DEV_QFRZN; 4804 } else if (runq) { 4805 xpt_run_dev_sendq(ccb_h->path->bus); 4806 } 4807 4808 /* Call the peripheral driver's callback */ 4809 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 4810 } 4811 }
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