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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/8.0/sys/cam/cam_xpt.c 197318 2009-09-18 20:35:05Z ken $"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/systm.h> 36 #include <sys/types.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/time.h> 40 #include <sys/conf.h> 41 #include <sys/fcntl.h> 42 #include <sys/md5.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/taskqueue.h> 46 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 #include <sys/sysctl.h> 50 #include <sys/kthread.h> 51 52 #ifdef PC98 53 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */ 54 #endif 55 56 #include <cam/cam.h> 57 #include <cam/cam_ccb.h> 58 #include <cam/cam_periph.h> 59 #include <cam/cam_queue.h> 60 #include <cam/cam_sim.h> 61 #include <cam/cam_xpt.h> 62 #include <cam/cam_xpt_sim.h> 63 #include <cam/cam_xpt_periph.h> 64 #include <cam/cam_xpt_internal.h> 65 #include <cam/cam_debug.h> 66 67 #include <cam/scsi/scsi_all.h> 68 #include <cam/scsi/scsi_message.h> 69 #include <cam/scsi/scsi_pass.h> 70 #include <machine/stdarg.h> /* for xpt_print below */ 71 #include "opt_cam.h" 72 73 /* 74 * This is the maximum number of high powered commands (e.g. start unit) 75 * that can be outstanding at a particular time. 76 */ 77 #ifndef CAM_MAX_HIGHPOWER 78 #define CAM_MAX_HIGHPOWER 4 79 #endif 80 81 /* Datastructures internal to the xpt layer */ 82 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 83 84 /* Object for defering XPT actions to a taskqueue */ 85 struct xpt_task { 86 struct task task; 87 void *data1; 88 uintptr_t data2; 89 }; 90 91 typedef enum { 92 XPT_FLAG_OPEN = 0x01 93 } xpt_flags; 94 95 struct xpt_softc { 96 xpt_flags flags; 97 u_int32_t xpt_generation; 98 99 /* number of high powered commands that can go through right now */ 100 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 101 int num_highpower; 102 103 /* queue for handling async rescan requests. */ 104 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 105 106 /* Registered busses */ 107 TAILQ_HEAD(,cam_eb) xpt_busses; 108 u_int bus_generation; 109 110 struct intr_config_hook *xpt_config_hook; 111 112 struct mtx xpt_topo_lock; 113 struct mtx xpt_lock; 114 }; 115 116 typedef enum { 117 DM_RET_COPY = 0x01, 118 DM_RET_FLAG_MASK = 0x0f, 119 DM_RET_NONE = 0x00, 120 DM_RET_STOP = 0x10, 121 DM_RET_DESCEND = 0x20, 122 DM_RET_ERROR = 0x30, 123 DM_RET_ACTION_MASK = 0xf0 124 } dev_match_ret; 125 126 typedef enum { 127 XPT_DEPTH_BUS, 128 XPT_DEPTH_TARGET, 129 XPT_DEPTH_DEVICE, 130 XPT_DEPTH_PERIPH 131 } xpt_traverse_depth; 132 133 struct xpt_traverse_config { 134 xpt_traverse_depth depth; 135 void *tr_func; 136 void *tr_arg; 137 }; 138 139 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 140 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 141 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 142 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 143 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 144 145 /* Transport layer configuration information */ 146 static struct xpt_softc xsoftc; 147 148 /* Queues for our software interrupt handler */ 149 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 150 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 151 static cam_simq_t cam_simq; 152 static struct mtx cam_simq_lock; 153 154 /* Pointers to software interrupt handlers */ 155 static void *cambio_ih; 156 157 struct cam_periph *xpt_periph; 158 159 static periph_init_t xpt_periph_init; 160 161 static struct periph_driver xpt_driver = 162 { 163 xpt_periph_init, "xpt", 164 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 165 }; 166 167 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 168 169 static d_open_t xptopen; 170 static d_close_t xptclose; 171 static d_ioctl_t xptioctl; 172 173 static struct cdevsw xpt_cdevsw = { 174 .d_version = D_VERSION, 175 .d_flags = 0, 176 .d_open = xptopen, 177 .d_close = xptclose, 178 .d_ioctl = xptioctl, 179 .d_name = "xpt", 180 }; 181 182 /* Storage for debugging datastructures */ 183 #ifdef CAMDEBUG 184 struct cam_path *cam_dpath; 185 u_int32_t cam_dflags; 186 u_int32_t cam_debug_delay; 187 #endif 188 189 /* Our boot-time initialization hook */ 190 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 191 192 static moduledata_t cam_moduledata = { 193 "cam", 194 cam_module_event_handler, 195 NULL 196 }; 197 198 static int xpt_init(void *); 199 200 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 201 MODULE_VERSION(cam, 1); 202 203 204 static void xpt_async_bcast(struct async_list *async_head, 205 u_int32_t async_code, 206 struct cam_path *path, 207 void *async_arg); 208 static path_id_t xptnextfreepathid(void); 209 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 210 static union ccb *xpt_get_ccb(struct cam_ed *device); 211 static void xpt_run_dev_allocq(struct cam_eb *bus); 212 static timeout_t xpt_release_devq_timeout; 213 static void xpt_release_simq_timeout(void *arg) __unused; 214 static void xpt_release_bus(struct cam_eb *bus); 215 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 216 int run_queue); 217 static struct cam_et* 218 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 219 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 220 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 221 struct cam_ed *device); 222 static struct cam_eb* 223 xpt_find_bus(path_id_t path_id); 224 static struct cam_et* 225 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 226 static struct cam_ed* 227 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 228 static xpt_busfunc_t xptconfigbuscountfunc; 229 static xpt_busfunc_t xptconfigfunc; 230 static void xpt_config(void *arg); 231 static xpt_devicefunc_t xptpassannouncefunc; 232 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 233 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 234 static void xptpoll(struct cam_sim *sim); 235 static void camisr(void *); 236 static void camisr_runqueue(void *); 237 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 238 u_int num_patterns, struct cam_eb *bus); 239 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 240 u_int num_patterns, 241 struct cam_ed *device); 242 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 243 u_int num_patterns, 244 struct cam_periph *periph); 245 static xpt_busfunc_t xptedtbusfunc; 246 static xpt_targetfunc_t xptedttargetfunc; 247 static xpt_devicefunc_t xptedtdevicefunc; 248 static xpt_periphfunc_t xptedtperiphfunc; 249 static xpt_pdrvfunc_t xptplistpdrvfunc; 250 static xpt_periphfunc_t xptplistperiphfunc; 251 static int xptedtmatch(struct ccb_dev_match *cdm); 252 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 253 static int xptbustraverse(struct cam_eb *start_bus, 254 xpt_busfunc_t *tr_func, void *arg); 255 static int xpttargettraverse(struct cam_eb *bus, 256 struct cam_et *start_target, 257 xpt_targetfunc_t *tr_func, void *arg); 258 static int xptdevicetraverse(struct cam_et *target, 259 struct cam_ed *start_device, 260 xpt_devicefunc_t *tr_func, void *arg); 261 static int xptperiphtraverse(struct cam_ed *device, 262 struct cam_periph *start_periph, 263 xpt_periphfunc_t *tr_func, void *arg); 264 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 265 xpt_pdrvfunc_t *tr_func, void *arg); 266 static int xptpdperiphtraverse(struct periph_driver **pdrv, 267 struct cam_periph *start_periph, 268 xpt_periphfunc_t *tr_func, 269 void *arg); 270 static xpt_busfunc_t xptdefbusfunc; 271 static xpt_targetfunc_t xptdeftargetfunc; 272 static xpt_devicefunc_t xptdefdevicefunc; 273 static xpt_periphfunc_t xptdefperiphfunc; 274 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 275 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 276 void *arg); 277 static void xpt_dev_async_default(u_int32_t async_code, 278 struct cam_eb *bus, 279 struct cam_et *target, 280 struct cam_ed *device, 281 void *async_arg); 282 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 283 struct cam_et *target, 284 lun_id_t lun_id); 285 static xpt_devicefunc_t xptsetasyncfunc; 286 static xpt_busfunc_t xptsetasyncbusfunc; 287 static cam_status xptregister(struct cam_periph *periph, 288 void *arg); 289 static void xpt_start_tags(struct cam_path *path); 290 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 291 struct cam_ed *dev); 292 static __inline int periph_is_queued(struct cam_periph *periph); 293 static __inline int device_is_alloc_queued(struct cam_ed *device); 294 static __inline int device_is_send_queued(struct cam_ed *device); 295 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 296 297 static __inline int 298 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 299 { 300 int retval; 301 302 if (dev->ccbq.devq_openings > 0) { 303 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 304 cam_ccbq_resize(&dev->ccbq, 305 dev->ccbq.dev_openings 306 + dev->ccbq.dev_active); 307 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 308 } 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_HEAD(&dev->drvq)->priority); 317 } else { 318 retval = 0; 319 } 320 321 return (retval); 322 } 323 324 static __inline int 325 periph_is_queued(struct cam_periph *periph) 326 { 327 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 328 } 329 330 static __inline int 331 device_is_alloc_queued(struct cam_ed *device) 332 { 333 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 334 } 335 336 static __inline int 337 device_is_send_queued(struct cam_ed *device) 338 { 339 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 340 } 341 342 static __inline int 343 dev_allocq_is_runnable(struct cam_devq *devq) 344 { 345 /* 346 * Have work to do. 347 * Have space to do more work. 348 * Allowed to do work. 349 */ 350 return ((devq->alloc_queue.qfrozen_cnt == 0) 351 && (devq->alloc_queue.entries > 0) 352 && (devq->alloc_openings > 0)); 353 } 354 355 static void 356 xpt_periph_init() 357 { 358 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 359 } 360 361 static void 362 xptdone(struct cam_periph *periph, union ccb *done_ccb) 363 { 364 /* Caller will release the CCB */ 365 wakeup(&done_ccb->ccb_h.cbfcnp); 366 } 367 368 static int 369 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 370 { 371 372 /* 373 * Only allow read-write access. 374 */ 375 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 376 return(EPERM); 377 378 /* 379 * We don't allow nonblocking access. 380 */ 381 if ((flags & O_NONBLOCK) != 0) { 382 printf("%s: can't do nonblocking access\n", devtoname(dev)); 383 return(ENODEV); 384 } 385 386 /* Mark ourselves open */ 387 mtx_lock(&xsoftc.xpt_lock); 388 xsoftc.flags |= XPT_FLAG_OPEN; 389 mtx_unlock(&xsoftc.xpt_lock); 390 391 return(0); 392 } 393 394 static int 395 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 396 { 397 398 /* Mark ourselves closed */ 399 mtx_lock(&xsoftc.xpt_lock); 400 xsoftc.flags &= ~XPT_FLAG_OPEN; 401 mtx_unlock(&xsoftc.xpt_lock); 402 403 return(0); 404 } 405 406 /* 407 * Don't automatically grab the xpt softc lock here even though this is going 408 * through the xpt device. The xpt device is really just a back door for 409 * accessing other devices and SIMs, so the right thing to do is to grab 410 * the appropriate SIM lock once the bus/SIM is located. 411 */ 412 static int 413 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 414 { 415 int error; 416 417 error = 0; 418 419 switch(cmd) { 420 /* 421 * For the transport layer CAMIOCOMMAND ioctl, we really only want 422 * to accept CCB types that don't quite make sense to send through a 423 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 424 * in the CAM spec. 425 */ 426 case CAMIOCOMMAND: { 427 union ccb *ccb; 428 union ccb *inccb; 429 struct cam_eb *bus; 430 431 inccb = (union ccb *)addr; 432 433 bus = xpt_find_bus(inccb->ccb_h.path_id); 434 if (bus == NULL) { 435 error = EINVAL; 436 break; 437 } 438 439 switch(inccb->ccb_h.func_code) { 440 case XPT_SCAN_BUS: 441 case XPT_RESET_BUS: 442 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 443 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 444 error = EINVAL; 445 break; 446 } 447 /* FALLTHROUGH */ 448 case XPT_PATH_INQ: 449 case XPT_ENG_INQ: 450 case XPT_SCAN_LUN: 451 452 ccb = xpt_alloc_ccb(); 453 454 CAM_SIM_LOCK(bus->sim); 455 456 /* 457 * Create a path using the bus, target, and lun the 458 * user passed in. 459 */ 460 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 461 inccb->ccb_h.path_id, 462 inccb->ccb_h.target_id, 463 inccb->ccb_h.target_lun) != 464 CAM_REQ_CMP){ 465 error = EINVAL; 466 CAM_SIM_UNLOCK(bus->sim); 467 xpt_free_ccb(ccb); 468 break; 469 } 470 /* Ensure all of our fields are correct */ 471 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 472 inccb->ccb_h.pinfo.priority); 473 xpt_merge_ccb(ccb, inccb); 474 ccb->ccb_h.cbfcnp = xptdone; 475 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 476 bcopy(ccb, inccb, sizeof(union ccb)); 477 xpt_free_path(ccb->ccb_h.path); 478 xpt_free_ccb(ccb); 479 CAM_SIM_UNLOCK(bus->sim); 480 break; 481 482 case XPT_DEBUG: { 483 union ccb ccb; 484 485 /* 486 * This is an immediate CCB, so it's okay to 487 * allocate it on the stack. 488 */ 489 490 CAM_SIM_LOCK(bus->sim); 491 492 /* 493 * Create a path using the bus, target, and lun the 494 * user passed in. 495 */ 496 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 497 inccb->ccb_h.path_id, 498 inccb->ccb_h.target_id, 499 inccb->ccb_h.target_lun) != 500 CAM_REQ_CMP){ 501 error = EINVAL; 502 CAM_SIM_UNLOCK(bus->sim); 503 break; 504 } 505 /* Ensure all of our fields are correct */ 506 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 507 inccb->ccb_h.pinfo.priority); 508 xpt_merge_ccb(&ccb, inccb); 509 ccb.ccb_h.cbfcnp = xptdone; 510 xpt_action(&ccb); 511 CAM_SIM_UNLOCK(bus->sim); 512 bcopy(&ccb, inccb, sizeof(union ccb)); 513 xpt_free_path(ccb.ccb_h.path); 514 break; 515 516 } 517 case XPT_DEV_MATCH: { 518 struct cam_periph_map_info mapinfo; 519 struct cam_path *old_path; 520 521 /* 522 * We can't deal with physical addresses for this 523 * type of transaction. 524 */ 525 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 526 error = EINVAL; 527 break; 528 } 529 530 /* 531 * Save this in case the caller had it set to 532 * something in particular. 533 */ 534 old_path = inccb->ccb_h.path; 535 536 /* 537 * We really don't need a path for the matching 538 * code. The path is needed because of the 539 * debugging statements in xpt_action(). They 540 * assume that the CCB has a valid path. 541 */ 542 inccb->ccb_h.path = xpt_periph->path; 543 544 bzero(&mapinfo, sizeof(mapinfo)); 545 546 /* 547 * Map the pattern and match buffers into kernel 548 * virtual address space. 549 */ 550 error = cam_periph_mapmem(inccb, &mapinfo); 551 552 if (error) { 553 inccb->ccb_h.path = old_path; 554 break; 555 } 556 557 /* 558 * This is an immediate CCB, we can send it on directly. 559 */ 560 xpt_action(inccb); 561 562 /* 563 * Map the buffers back into user space. 564 */ 565 cam_periph_unmapmem(inccb, &mapinfo); 566 567 inccb->ccb_h.path = old_path; 568 569 error = 0; 570 break; 571 } 572 default: 573 error = ENOTSUP; 574 break; 575 } 576 xpt_release_bus(bus); 577 break; 578 } 579 /* 580 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 581 * with the periphal driver name and unit name filled in. The other 582 * fields don't really matter as input. The passthrough driver name 583 * ("pass"), and unit number are passed back in the ccb. The current 584 * device generation number, and the index into the device peripheral 585 * driver list, and the status are also passed back. Note that 586 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 587 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 588 * (or rather should be) impossible for the device peripheral driver 589 * list to change since we look at the whole thing in one pass, and 590 * we do it with lock protection. 591 * 592 */ 593 case CAMGETPASSTHRU: { 594 union ccb *ccb; 595 struct cam_periph *periph; 596 struct periph_driver **p_drv; 597 char *name; 598 u_int unit; 599 u_int cur_generation; 600 int base_periph_found; 601 int splbreaknum; 602 603 ccb = (union ccb *)addr; 604 unit = ccb->cgdl.unit_number; 605 name = ccb->cgdl.periph_name; 606 /* 607 * Every 100 devices, we want to drop our lock protection to 608 * give the software interrupt handler a chance to run. 609 * Most systems won't run into this check, but this should 610 * avoid starvation in the software interrupt handler in 611 * large systems. 612 */ 613 splbreaknum = 100; 614 615 ccb = (union ccb *)addr; 616 617 base_periph_found = 0; 618 619 /* 620 * Sanity check -- make sure we don't get a null peripheral 621 * driver name. 622 */ 623 if (*ccb->cgdl.periph_name == '\0') { 624 error = EINVAL; 625 break; 626 } 627 628 /* Keep the list from changing while we traverse it */ 629 mtx_lock(&xsoftc.xpt_topo_lock); 630 ptstartover: 631 cur_generation = xsoftc.xpt_generation; 632 633 /* first find our driver in the list of drivers */ 634 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 635 if (strcmp((*p_drv)->driver_name, name) == 0) 636 break; 637 638 if (*p_drv == NULL) { 639 mtx_unlock(&xsoftc.xpt_topo_lock); 640 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 641 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 642 *ccb->cgdl.periph_name = '\0'; 643 ccb->cgdl.unit_number = 0; 644 error = ENOENT; 645 break; 646 } 647 648 /* 649 * Run through every peripheral instance of this driver 650 * and check to see whether it matches the unit passed 651 * in by the user. If it does, get out of the loops and 652 * find the passthrough driver associated with that 653 * peripheral driver. 654 */ 655 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 656 periph = TAILQ_NEXT(periph, unit_links)) { 657 658 if (periph->unit_number == unit) { 659 break; 660 } else if (--splbreaknum == 0) { 661 mtx_unlock(&xsoftc.xpt_topo_lock); 662 mtx_lock(&xsoftc.xpt_topo_lock); 663 splbreaknum = 100; 664 if (cur_generation != xsoftc.xpt_generation) 665 goto ptstartover; 666 } 667 } 668 /* 669 * If we found the peripheral driver that the user passed 670 * in, go through all of the peripheral drivers for that 671 * particular device and look for a passthrough driver. 672 */ 673 if (periph != NULL) { 674 struct cam_ed *device; 675 int i; 676 677 base_periph_found = 1; 678 device = periph->path->device; 679 for (i = 0, periph = SLIST_FIRST(&device->periphs); 680 periph != NULL; 681 periph = SLIST_NEXT(periph, periph_links), i++) { 682 /* 683 * Check to see whether we have a 684 * passthrough device or not. 685 */ 686 if (strcmp(periph->periph_name, "pass") == 0) { 687 /* 688 * Fill in the getdevlist fields. 689 */ 690 strcpy(ccb->cgdl.periph_name, 691 periph->periph_name); 692 ccb->cgdl.unit_number = 693 periph->unit_number; 694 if (SLIST_NEXT(periph, periph_links)) 695 ccb->cgdl.status = 696 CAM_GDEVLIST_MORE_DEVS; 697 else 698 ccb->cgdl.status = 699 CAM_GDEVLIST_LAST_DEVICE; 700 ccb->cgdl.generation = 701 device->generation; 702 ccb->cgdl.index = i; 703 /* 704 * Fill in some CCB header fields 705 * that the user may want. 706 */ 707 ccb->ccb_h.path_id = 708 periph->path->bus->path_id; 709 ccb->ccb_h.target_id = 710 periph->path->target->target_id; 711 ccb->ccb_h.target_lun = 712 periph->path->device->lun_id; 713 ccb->ccb_h.status = CAM_REQ_CMP; 714 break; 715 } 716 } 717 } 718 719 /* 720 * If the periph is null here, one of two things has 721 * happened. The first possibility is that we couldn't 722 * find the unit number of the particular peripheral driver 723 * that the user is asking about. e.g. the user asks for 724 * the passthrough driver for "da11". We find the list of 725 * "da" peripherals all right, but there is no unit 11. 726 * The other possibility is that we went through the list 727 * of peripheral drivers attached to the device structure, 728 * but didn't find one with the name "pass". Either way, 729 * we return ENOENT, since we couldn't find something. 730 */ 731 if (periph == NULL) { 732 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 733 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 734 *ccb->cgdl.periph_name = '\0'; 735 ccb->cgdl.unit_number = 0; 736 error = ENOENT; 737 /* 738 * It is unfortunate that this is even necessary, 739 * but there are many, many clueless users out there. 740 * If this is true, the user is looking for the 741 * passthrough driver, but doesn't have one in his 742 * kernel. 743 */ 744 if (base_periph_found == 1) { 745 printf("xptioctl: pass driver is not in the " 746 "kernel\n"); 747 printf("xptioctl: put \"device pass\" in " 748 "your kernel config file\n"); 749 } 750 } 751 mtx_unlock(&xsoftc.xpt_topo_lock); 752 break; 753 } 754 default: 755 error = ENOTTY; 756 break; 757 } 758 759 return(error); 760 } 761 762 static int 763 cam_module_event_handler(module_t mod, int what, void *arg) 764 { 765 int error; 766 767 switch (what) { 768 case MOD_LOAD: 769 if ((error = xpt_init(NULL)) != 0) 770 return (error); 771 break; 772 case MOD_UNLOAD: 773 return EBUSY; 774 default: 775 return EOPNOTSUPP; 776 } 777 778 return 0; 779 } 780 781 /* thread to handle bus rescans */ 782 static void 783 xpt_scanner_thread(void *dummy) 784 { 785 cam_isrq_t queue; 786 union ccb *ccb; 787 struct cam_sim *sim; 788 789 for (;;) { 790 /* 791 * Wait for a rescan request to come in. When it does, splice 792 * it onto a queue from local storage so that the xpt lock 793 * doesn't need to be held while the requests are being 794 * processed. 795 */ 796 xpt_lock_buses(); 797 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 798 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 799 "ccb_scanq", 0); 800 TAILQ_INIT(&queue); 801 TAILQ_CONCAT(&queue, &xsoftc.ccb_scanq, sim_links.tqe); 802 xpt_unlock_buses(); 803 804 while ((ccb = (union ccb *)TAILQ_FIRST(&queue)) != NULL) { 805 TAILQ_REMOVE(&queue, &ccb->ccb_h, sim_links.tqe); 806 807 sim = ccb->ccb_h.path->bus->sim; 808 CAM_SIM_LOCK(sim); 809 810 if( ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD ) 811 ccb->ccb_h.func_code = XPT_SCAN_BUS; 812 else 813 ccb->ccb_h.func_code = XPT_SCAN_LUN; 814 ccb->ccb_h.cbfcnp = xptdone; 815 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1); 816 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 817 xpt_free_path(ccb->ccb_h.path); 818 xpt_free_ccb(ccb); 819 CAM_SIM_UNLOCK(sim); 820 } 821 } 822 } 823 824 void 825 xpt_rescan(union ccb *ccb) 826 { 827 struct ccb_hdr *hdr; 828 829 /* 830 * Don't make duplicate entries for the same paths. 831 */ 832 xpt_lock_buses(); 833 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 834 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 835 wakeup(&xsoftc.ccb_scanq); 836 xpt_unlock_buses(); 837 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 838 xpt_free_path(ccb->ccb_h.path); 839 xpt_free_ccb(ccb); 840 return; 841 } 842 } 843 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 844 wakeup(&xsoftc.ccb_scanq); 845 xpt_unlock_buses(); 846 } 847 848 /* Functions accessed by the peripheral drivers */ 849 static int 850 xpt_init(void *dummy) 851 { 852 struct cam_sim *xpt_sim; 853 struct cam_path *path; 854 struct cam_devq *devq; 855 cam_status status; 856 857 TAILQ_INIT(&xsoftc.xpt_busses); 858 TAILQ_INIT(&cam_simq); 859 TAILQ_INIT(&xsoftc.ccb_scanq); 860 STAILQ_INIT(&xsoftc.highpowerq); 861 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 862 863 mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF); 864 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 865 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF); 866 867 /* 868 * The xpt layer is, itself, the equivelent of a SIM. 869 * Allow 16 ccbs in the ccb pool for it. This should 870 * give decent parallelism when we probe busses and 871 * perform other XPT functions. 872 */ 873 devq = cam_simq_alloc(16); 874 xpt_sim = cam_sim_alloc(xptaction, 875 xptpoll, 876 "xpt", 877 /*softc*/NULL, 878 /*unit*/0, 879 /*mtx*/&xsoftc.xpt_lock, 880 /*max_dev_transactions*/0, 881 /*max_tagged_dev_transactions*/0, 882 devq); 883 if (xpt_sim == NULL) 884 return (ENOMEM); 885 886 xpt_sim->max_ccbs = 16; 887 888 mtx_lock(&xsoftc.xpt_lock); 889 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 890 printf("xpt_init: xpt_bus_register failed with status %#x," 891 " failing attach\n", status); 892 return (EINVAL); 893 } 894 895 /* 896 * Looking at the XPT from the SIM layer, the XPT is 897 * the equivelent of a peripheral driver. Allocate 898 * a peripheral driver entry for us. 899 */ 900 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 901 CAM_TARGET_WILDCARD, 902 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 903 printf("xpt_init: xpt_create_path failed with status %#x," 904 " failing attach\n", status); 905 return (EINVAL); 906 } 907 908 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 909 path, NULL, 0, xpt_sim); 910 xpt_free_path(path); 911 mtx_unlock(&xsoftc.xpt_lock); 912 913 /* 914 * Register a callback for when interrupts are enabled. 915 */ 916 xsoftc.xpt_config_hook = 917 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 918 M_CAMXPT, M_NOWAIT | M_ZERO); 919 if (xsoftc.xpt_config_hook == NULL) { 920 printf("xpt_init: Cannot malloc config hook " 921 "- failing attach\n"); 922 return (ENOMEM); 923 } 924 925 xsoftc.xpt_config_hook->ich_func = xpt_config; 926 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 927 free (xsoftc.xpt_config_hook, M_CAMXPT); 928 printf("xpt_init: config_intrhook_establish failed " 929 "- failing attach\n"); 930 } 931 932 /* fire up rescan thread */ 933 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) { 934 printf("xpt_init: failed to create rescan thread\n"); 935 } 936 /* Install our software interrupt handlers */ 937 swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih); 938 939 return (0); 940 } 941 942 static cam_status 943 xptregister(struct cam_periph *periph, void *arg) 944 { 945 struct cam_sim *xpt_sim; 946 947 if (periph == NULL) { 948 printf("xptregister: periph was NULL!!\n"); 949 return(CAM_REQ_CMP_ERR); 950 } 951 952 xpt_sim = (struct cam_sim *)arg; 953 xpt_sim->softc = periph; 954 xpt_periph = periph; 955 periph->softc = NULL; 956 957 return(CAM_REQ_CMP); 958 } 959 960 int32_t 961 xpt_add_periph(struct cam_periph *periph) 962 { 963 struct cam_ed *device; 964 int32_t status; 965 struct periph_list *periph_head; 966 967 mtx_assert(periph->sim->mtx, MA_OWNED); 968 969 device = periph->path->device; 970 971 periph_head = &device->periphs; 972 973 status = CAM_REQ_CMP; 974 975 if (device != NULL) { 976 /* 977 * Make room for this peripheral 978 * so it will fit in the queue 979 * when it's scheduled to run 980 */ 981 status = camq_resize(&device->drvq, 982 device->drvq.array_size + 1); 983 984 device->generation++; 985 986 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 987 } 988 989 mtx_lock(&xsoftc.xpt_topo_lock); 990 xsoftc.xpt_generation++; 991 mtx_unlock(&xsoftc.xpt_topo_lock); 992 993 return (status); 994 } 995 996 void 997 xpt_remove_periph(struct cam_periph *periph) 998 { 999 struct cam_ed *device; 1000 1001 mtx_assert(periph->sim->mtx, MA_OWNED); 1002 1003 device = periph->path->device; 1004 1005 if (device != NULL) { 1006 struct periph_list *periph_head; 1007 1008 periph_head = &device->periphs; 1009 1010 /* Release the slot for this peripheral */ 1011 camq_resize(&device->drvq, device->drvq.array_size - 1); 1012 1013 device->generation++; 1014 1015 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1016 } 1017 1018 mtx_lock(&xsoftc.xpt_topo_lock); 1019 xsoftc.xpt_generation++; 1020 mtx_unlock(&xsoftc.xpt_topo_lock); 1021 } 1022 1023 1024 void 1025 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1026 { 1027 struct ccb_pathinq cpi; 1028 struct ccb_trans_settings cts; 1029 struct cam_path *path; 1030 u_int speed; 1031 u_int freq; 1032 u_int mb; 1033 1034 mtx_assert(periph->sim->mtx, MA_OWNED); 1035 1036 path = periph->path; 1037 /* 1038 * To ensure that this is printed in one piece, 1039 * mask out CAM interrupts. 1040 */ 1041 printf("%s%d at %s%d bus %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->target->target_id, 1047 path->device->lun_id); 1048 printf("%s%d: ", periph->periph_name, periph->unit_number); 1049 if (path->device->protocol == PROTO_SCSI) 1050 scsi_print_inquiry(&path->device->inq_data); 1051 else if (path->device->protocol == PROTO_ATA || 1052 path->device->protocol == PROTO_SATAPM) 1053 ata_print_ident(&path->device->ident_data); 1054 else 1055 printf("Unknown protocol device\n"); 1056 if (bootverbose && path->device->serial_num_len > 0) { 1057 /* Don't wrap the screen - print only the first 60 chars */ 1058 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1059 periph->unit_number, path->device->serial_num); 1060 } 1061 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1062 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1063 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1064 xpt_action((union ccb*)&cts); 1065 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1066 return; 1067 } 1068 1069 /* Ask the SIM for its base transfer speed */ 1070 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1071 cpi.ccb_h.func_code = XPT_PATH_INQ; 1072 xpt_action((union ccb *)&cpi); 1073 1074 speed = cpi.base_transfer_speed; 1075 freq = 0; 1076 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1077 struct ccb_trans_settings_spi *spi; 1078 1079 spi = &cts.xport_specific.spi; 1080 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1081 && spi->sync_offset != 0) { 1082 freq = scsi_calc_syncsrate(spi->sync_period); 1083 speed = freq; 1084 } 1085 1086 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1087 speed *= (0x01 << spi->bus_width); 1088 } 1089 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1090 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1091 if (fc->valid & CTS_FC_VALID_SPEED) 1092 speed = fc->bitrate; 1093 } 1094 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { 1095 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; 1096 if (sas->valid & CTS_SAS_VALID_SPEED) 1097 speed = sas->bitrate; 1098 } 1099 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SATA) { 1100 struct ccb_trans_settings_sata *sata = &cts.xport_specific.sata; 1101 if (sata->valid & CTS_SATA_VALID_SPEED) 1102 speed = sata->bitrate; 1103 } 1104 1105 mb = speed / 1000; 1106 if (mb > 0) 1107 printf("%s%d: %d.%03dMB/s transfers", 1108 periph->periph_name, periph->unit_number, 1109 mb, speed % 1000); 1110 else 1111 printf("%s%d: %dKB/s transfers", periph->periph_name, 1112 periph->unit_number, speed); 1113 /* Report additional information about SPI connections */ 1114 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1115 struct ccb_trans_settings_spi *spi; 1116 1117 spi = &cts.xport_specific.spi; 1118 if (freq != 0) { 1119 printf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1120 freq % 1000, 1121 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1122 ? " DT" : "", 1123 spi->sync_offset); 1124 } 1125 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1126 && spi->bus_width > 0) { 1127 if (freq != 0) { 1128 printf(", "); 1129 } else { 1130 printf(" ("); 1131 } 1132 printf("%dbit)", 8 * (0x01 << spi->bus_width)); 1133 } else if (freq != 0) { 1134 printf(")"); 1135 } 1136 } 1137 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1138 struct ccb_trans_settings_fc *fc; 1139 1140 fc = &cts.xport_specific.fc; 1141 if (fc->valid & CTS_FC_VALID_WWNN) 1142 printf(" WWNN 0x%llx", (long long) fc->wwnn); 1143 if (fc->valid & CTS_FC_VALID_WWPN) 1144 printf(" WWPN 0x%llx", (long long) fc->wwpn); 1145 if (fc->valid & CTS_FC_VALID_PORT) 1146 printf(" PortID 0x%x", fc->port); 1147 } 1148 1149 if (path->device->inq_flags & SID_CmdQue 1150 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1151 printf("\n%s%d: Command Queueing enabled", 1152 periph->periph_name, periph->unit_number); 1153 } 1154 printf("\n"); 1155 1156 /* 1157 * We only want to print the caller's announce string if they've 1158 * passed one in.. 1159 */ 1160 if (announce_string != NULL) 1161 printf("%s%d: %s\n", periph->periph_name, 1162 periph->unit_number, announce_string); 1163 } 1164 1165 static dev_match_ret 1166 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1167 struct cam_eb *bus) 1168 { 1169 dev_match_ret retval; 1170 int i; 1171 1172 retval = DM_RET_NONE; 1173 1174 /* 1175 * If we aren't given something to match against, that's an error. 1176 */ 1177 if (bus == NULL) 1178 return(DM_RET_ERROR); 1179 1180 /* 1181 * If there are no match entries, then this bus matches no 1182 * matter what. 1183 */ 1184 if ((patterns == NULL) || (num_patterns == 0)) 1185 return(DM_RET_DESCEND | DM_RET_COPY); 1186 1187 for (i = 0; i < num_patterns; i++) { 1188 struct bus_match_pattern *cur_pattern; 1189 1190 /* 1191 * If the pattern in question isn't for a bus node, we 1192 * aren't interested. However, we do indicate to the 1193 * calling routine that we should continue descending the 1194 * tree, since the user wants to match against lower-level 1195 * EDT elements. 1196 */ 1197 if (patterns[i].type != DEV_MATCH_BUS) { 1198 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1199 retval |= DM_RET_DESCEND; 1200 continue; 1201 } 1202 1203 cur_pattern = &patterns[i].pattern.bus_pattern; 1204 1205 /* 1206 * If they want to match any bus node, we give them any 1207 * device node. 1208 */ 1209 if (cur_pattern->flags == BUS_MATCH_ANY) { 1210 /* set the copy flag */ 1211 retval |= DM_RET_COPY; 1212 1213 /* 1214 * If we've already decided on an action, go ahead 1215 * and return. 1216 */ 1217 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1218 return(retval); 1219 } 1220 1221 /* 1222 * Not sure why someone would do this... 1223 */ 1224 if (cur_pattern->flags == BUS_MATCH_NONE) 1225 continue; 1226 1227 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1228 && (cur_pattern->path_id != bus->path_id)) 1229 continue; 1230 1231 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1232 && (cur_pattern->bus_id != bus->sim->bus_id)) 1233 continue; 1234 1235 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1236 && (cur_pattern->unit_number != bus->sim->unit_number)) 1237 continue; 1238 1239 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1240 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1241 DEV_IDLEN) != 0)) 1242 continue; 1243 1244 /* 1245 * If we get to this point, the user definitely wants 1246 * information on this bus. So tell the caller to copy the 1247 * data out. 1248 */ 1249 retval |= DM_RET_COPY; 1250 1251 /* 1252 * If the return action has been set to descend, then we 1253 * know that we've already seen a non-bus matching 1254 * expression, therefore we need to further descend the tree. 1255 * This won't change by continuing around the loop, so we 1256 * go ahead and return. If we haven't seen a non-bus 1257 * matching expression, we keep going around the loop until 1258 * we exhaust the matching expressions. We'll set the stop 1259 * flag once we fall out of the loop. 1260 */ 1261 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1262 return(retval); 1263 } 1264 1265 /* 1266 * If the return action hasn't been set to descend yet, that means 1267 * we haven't seen anything other than bus matching patterns. So 1268 * tell the caller to stop descending the tree -- the user doesn't 1269 * want to match against lower level tree elements. 1270 */ 1271 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1272 retval |= DM_RET_STOP; 1273 1274 return(retval); 1275 } 1276 1277 static dev_match_ret 1278 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1279 struct cam_ed *device) 1280 { 1281 dev_match_ret retval; 1282 int i; 1283 1284 retval = DM_RET_NONE; 1285 1286 /* 1287 * If we aren't given something to match against, that's an error. 1288 */ 1289 if (device == NULL) 1290 return(DM_RET_ERROR); 1291 1292 /* 1293 * If there are no match entries, then this device matches no 1294 * matter what. 1295 */ 1296 if ((patterns == NULL) || (num_patterns == 0)) 1297 return(DM_RET_DESCEND | DM_RET_COPY); 1298 1299 for (i = 0; i < num_patterns; i++) { 1300 struct device_match_pattern *cur_pattern; 1301 1302 /* 1303 * If the pattern in question isn't for a device node, we 1304 * aren't interested. 1305 */ 1306 if (patterns[i].type != DEV_MATCH_DEVICE) { 1307 if ((patterns[i].type == DEV_MATCH_PERIPH) 1308 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1309 retval |= DM_RET_DESCEND; 1310 continue; 1311 } 1312 1313 cur_pattern = &patterns[i].pattern.device_pattern; 1314 1315 /* 1316 * If they want to match any device node, we give them any 1317 * device node. 1318 */ 1319 if (cur_pattern->flags == DEV_MATCH_ANY) { 1320 /* set the copy flag */ 1321 retval |= DM_RET_COPY; 1322 1323 1324 /* 1325 * If we've already decided on an action, go ahead 1326 * and return. 1327 */ 1328 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1329 return(retval); 1330 } 1331 1332 /* 1333 * Not sure why someone would do this... 1334 */ 1335 if (cur_pattern->flags == DEV_MATCH_NONE) 1336 continue; 1337 1338 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1339 && (cur_pattern->path_id != device->target->bus->path_id)) 1340 continue; 1341 1342 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1343 && (cur_pattern->target_id != device->target->target_id)) 1344 continue; 1345 1346 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1347 && (cur_pattern->target_lun != device->lun_id)) 1348 continue; 1349 1350 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1351 && (cam_quirkmatch((caddr_t)&device->inq_data, 1352 (caddr_t)&cur_pattern->inq_pat, 1353 1, sizeof(cur_pattern->inq_pat), 1354 scsi_static_inquiry_match) == NULL)) 1355 continue; 1356 1357 /* 1358 * If we get to this point, the user definitely wants 1359 * information on this device. So tell the caller to copy 1360 * the data out. 1361 */ 1362 retval |= DM_RET_COPY; 1363 1364 /* 1365 * If the return action has been set to descend, then we 1366 * know that we've already seen a peripheral matching 1367 * expression, therefore we need to further descend the tree. 1368 * This won't change by continuing around the loop, so we 1369 * go ahead and return. If we haven't seen a peripheral 1370 * matching expression, we keep going around the loop until 1371 * we exhaust the matching expressions. We'll set the stop 1372 * flag once we fall out of the loop. 1373 */ 1374 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1375 return(retval); 1376 } 1377 1378 /* 1379 * If the return action hasn't been set to descend yet, that means 1380 * we haven't seen any peripheral matching patterns. So tell the 1381 * caller to stop descending the tree -- the user doesn't want to 1382 * match against lower level tree elements. 1383 */ 1384 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1385 retval |= DM_RET_STOP; 1386 1387 return(retval); 1388 } 1389 1390 /* 1391 * Match a single peripheral against any number of match patterns. 1392 */ 1393 static dev_match_ret 1394 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1395 struct cam_periph *periph) 1396 { 1397 dev_match_ret retval; 1398 int i; 1399 1400 /* 1401 * If we aren't given something to match against, that's an error. 1402 */ 1403 if (periph == NULL) 1404 return(DM_RET_ERROR); 1405 1406 /* 1407 * If there are no match entries, then this peripheral matches no 1408 * matter what. 1409 */ 1410 if ((patterns == NULL) || (num_patterns == 0)) 1411 return(DM_RET_STOP | DM_RET_COPY); 1412 1413 /* 1414 * There aren't any nodes below a peripheral node, so there's no 1415 * reason to descend the tree any further. 1416 */ 1417 retval = DM_RET_STOP; 1418 1419 for (i = 0; i < num_patterns; i++) { 1420 struct periph_match_pattern *cur_pattern; 1421 1422 /* 1423 * If the pattern in question isn't for a peripheral, we 1424 * aren't interested. 1425 */ 1426 if (patterns[i].type != DEV_MATCH_PERIPH) 1427 continue; 1428 1429 cur_pattern = &patterns[i].pattern.periph_pattern; 1430 1431 /* 1432 * If they want to match on anything, then we will do so. 1433 */ 1434 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1435 /* set the copy flag */ 1436 retval |= DM_RET_COPY; 1437 1438 /* 1439 * We've already set the return action to stop, 1440 * since there are no nodes below peripherals in 1441 * the tree. 1442 */ 1443 return(retval); 1444 } 1445 1446 /* 1447 * Not sure why someone would do this... 1448 */ 1449 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1450 continue; 1451 1452 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1453 && (cur_pattern->path_id != periph->path->bus->path_id)) 1454 continue; 1455 1456 /* 1457 * For the target and lun id's, we have to make sure the 1458 * target and lun pointers aren't NULL. The xpt peripheral 1459 * has a wildcard target and device. 1460 */ 1461 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1462 && ((periph->path->target == NULL) 1463 ||(cur_pattern->target_id != periph->path->target->target_id))) 1464 continue; 1465 1466 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1467 && ((periph->path->device == NULL) 1468 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1469 continue; 1470 1471 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1472 && (cur_pattern->unit_number != periph->unit_number)) 1473 continue; 1474 1475 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1476 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1477 DEV_IDLEN) != 0)) 1478 continue; 1479 1480 /* 1481 * If we get to this point, the user definitely wants 1482 * information on this peripheral. So tell the caller to 1483 * copy the data out. 1484 */ 1485 retval |= DM_RET_COPY; 1486 1487 /* 1488 * The return action has already been set to stop, since 1489 * peripherals don't have any nodes below them in the EDT. 1490 */ 1491 return(retval); 1492 } 1493 1494 /* 1495 * If we get to this point, the peripheral that was passed in 1496 * doesn't match any of the patterns. 1497 */ 1498 return(retval); 1499 } 1500 1501 static int 1502 xptedtbusfunc(struct cam_eb *bus, void *arg) 1503 { 1504 struct ccb_dev_match *cdm; 1505 dev_match_ret retval; 1506 1507 cdm = (struct ccb_dev_match *)arg; 1508 1509 /* 1510 * If our position is for something deeper in the tree, that means 1511 * that we've already seen this node. So, we keep going down. 1512 */ 1513 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1514 && (cdm->pos.cookie.bus == bus) 1515 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1516 && (cdm->pos.cookie.target != NULL)) 1517 retval = DM_RET_DESCEND; 1518 else 1519 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1520 1521 /* 1522 * If we got an error, bail out of the search. 1523 */ 1524 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1525 cdm->status = CAM_DEV_MATCH_ERROR; 1526 return(0); 1527 } 1528 1529 /* 1530 * If the copy flag is set, copy this bus out. 1531 */ 1532 if (retval & DM_RET_COPY) { 1533 int spaceleft, j; 1534 1535 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1536 sizeof(struct dev_match_result)); 1537 1538 /* 1539 * If we don't have enough space to put in another 1540 * match result, save our position and tell the 1541 * user there are more devices to check. 1542 */ 1543 if (spaceleft < sizeof(struct dev_match_result)) { 1544 bzero(&cdm->pos, sizeof(cdm->pos)); 1545 cdm->pos.position_type = 1546 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1547 1548 cdm->pos.cookie.bus = bus; 1549 cdm->pos.generations[CAM_BUS_GENERATION]= 1550 xsoftc.bus_generation; 1551 cdm->status = CAM_DEV_MATCH_MORE; 1552 return(0); 1553 } 1554 j = cdm->num_matches; 1555 cdm->num_matches++; 1556 cdm->matches[j].type = DEV_MATCH_BUS; 1557 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1558 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1559 cdm->matches[j].result.bus_result.unit_number = 1560 bus->sim->unit_number; 1561 strncpy(cdm->matches[j].result.bus_result.dev_name, 1562 bus->sim->sim_name, DEV_IDLEN); 1563 } 1564 1565 /* 1566 * If the user is only interested in busses, there's no 1567 * reason to descend to the next level in the tree. 1568 */ 1569 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1570 return(1); 1571 1572 /* 1573 * If there is a target generation recorded, check it to 1574 * make sure the target list hasn't changed. 1575 */ 1576 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1577 && (bus == cdm->pos.cookie.bus) 1578 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1579 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1580 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1581 bus->generation)) { 1582 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1583 return(0); 1584 } 1585 1586 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1587 && (cdm->pos.cookie.bus == bus) 1588 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1589 && (cdm->pos.cookie.target != NULL)) 1590 return(xpttargettraverse(bus, 1591 (struct cam_et *)cdm->pos.cookie.target, 1592 xptedttargetfunc, arg)); 1593 else 1594 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1595 } 1596 1597 static int 1598 xptedttargetfunc(struct cam_et *target, void *arg) 1599 { 1600 struct ccb_dev_match *cdm; 1601 1602 cdm = (struct ccb_dev_match *)arg; 1603 1604 /* 1605 * If there is a device list generation recorded, check it to 1606 * make sure the device list hasn't changed. 1607 */ 1608 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1609 && (cdm->pos.cookie.bus == target->bus) 1610 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1611 && (cdm->pos.cookie.target == target) 1612 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1613 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1614 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1615 target->generation)) { 1616 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1617 return(0); 1618 } 1619 1620 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1621 && (cdm->pos.cookie.bus == target->bus) 1622 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1623 && (cdm->pos.cookie.target == target) 1624 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1625 && (cdm->pos.cookie.device != NULL)) 1626 return(xptdevicetraverse(target, 1627 (struct cam_ed *)cdm->pos.cookie.device, 1628 xptedtdevicefunc, arg)); 1629 else 1630 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 1631 } 1632 1633 static int 1634 xptedtdevicefunc(struct cam_ed *device, void *arg) 1635 { 1636 1637 struct ccb_dev_match *cdm; 1638 dev_match_ret retval; 1639 1640 cdm = (struct ccb_dev_match *)arg; 1641 1642 /* 1643 * If our position is for something deeper in the tree, that means 1644 * that we've already seen this node. So, we keep going down. 1645 */ 1646 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1647 && (cdm->pos.cookie.device == device) 1648 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1649 && (cdm->pos.cookie.periph != NULL)) 1650 retval = DM_RET_DESCEND; 1651 else 1652 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1653 device); 1654 1655 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1656 cdm->status = CAM_DEV_MATCH_ERROR; 1657 return(0); 1658 } 1659 1660 /* 1661 * If the copy flag is set, copy this device out. 1662 */ 1663 if (retval & DM_RET_COPY) { 1664 int spaceleft, j; 1665 1666 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1667 sizeof(struct dev_match_result)); 1668 1669 /* 1670 * If we don't have enough space to put in another 1671 * match result, save our position and tell the 1672 * user there are more devices to check. 1673 */ 1674 if (spaceleft < sizeof(struct dev_match_result)) { 1675 bzero(&cdm->pos, sizeof(cdm->pos)); 1676 cdm->pos.position_type = 1677 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1678 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1679 1680 cdm->pos.cookie.bus = device->target->bus; 1681 cdm->pos.generations[CAM_BUS_GENERATION]= 1682 xsoftc.bus_generation; 1683 cdm->pos.cookie.target = device->target; 1684 cdm->pos.generations[CAM_TARGET_GENERATION] = 1685 device->target->bus->generation; 1686 cdm->pos.cookie.device = device; 1687 cdm->pos.generations[CAM_DEV_GENERATION] = 1688 device->target->generation; 1689 cdm->status = CAM_DEV_MATCH_MORE; 1690 return(0); 1691 } 1692 j = cdm->num_matches; 1693 cdm->num_matches++; 1694 cdm->matches[j].type = DEV_MATCH_DEVICE; 1695 cdm->matches[j].result.device_result.path_id = 1696 device->target->bus->path_id; 1697 cdm->matches[j].result.device_result.target_id = 1698 device->target->target_id; 1699 cdm->matches[j].result.device_result.target_lun = 1700 device->lun_id; 1701 cdm->matches[j].result.device_result.protocol = 1702 device->protocol; 1703 bcopy(&device->inq_data, 1704 &cdm->matches[j].result.device_result.inq_data, 1705 sizeof(struct scsi_inquiry_data)); 1706 bcopy(&device->ident_data, 1707 &cdm->matches[j].result.device_result.ident_data, 1708 sizeof(struct ata_params)); 1709 1710 /* Let the user know whether this device is unconfigured */ 1711 if (device->flags & CAM_DEV_UNCONFIGURED) 1712 cdm->matches[j].result.device_result.flags = 1713 DEV_RESULT_UNCONFIGURED; 1714 else 1715 cdm->matches[j].result.device_result.flags = 1716 DEV_RESULT_NOFLAG; 1717 } 1718 1719 /* 1720 * If the user isn't interested in peripherals, don't descend 1721 * the tree any further. 1722 */ 1723 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1724 return(1); 1725 1726 /* 1727 * If there is a peripheral list generation recorded, make sure 1728 * it hasn't changed. 1729 */ 1730 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1731 && (device->target->bus == cdm->pos.cookie.bus) 1732 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1733 && (device->target == cdm->pos.cookie.target) 1734 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1735 && (device == cdm->pos.cookie.device) 1736 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1737 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1738 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1739 device->generation)){ 1740 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1741 return(0); 1742 } 1743 1744 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1745 && (cdm->pos.cookie.bus == device->target->bus) 1746 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1747 && (cdm->pos.cookie.target == device->target) 1748 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1749 && (cdm->pos.cookie.device == device) 1750 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1751 && (cdm->pos.cookie.periph != NULL)) 1752 return(xptperiphtraverse(device, 1753 (struct cam_periph *)cdm->pos.cookie.periph, 1754 xptedtperiphfunc, arg)); 1755 else 1756 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 1757 } 1758 1759 static int 1760 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1761 { 1762 struct ccb_dev_match *cdm; 1763 dev_match_ret retval; 1764 1765 cdm = (struct ccb_dev_match *)arg; 1766 1767 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1768 1769 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1770 cdm->status = CAM_DEV_MATCH_ERROR; 1771 return(0); 1772 } 1773 1774 /* 1775 * If the copy flag is set, copy this peripheral out. 1776 */ 1777 if (retval & DM_RET_COPY) { 1778 int spaceleft, j; 1779 1780 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1781 sizeof(struct dev_match_result)); 1782 1783 /* 1784 * If we don't have enough space to put in another 1785 * match result, save our position and tell the 1786 * user there are more devices to check. 1787 */ 1788 if (spaceleft < sizeof(struct dev_match_result)) { 1789 bzero(&cdm->pos, sizeof(cdm->pos)); 1790 cdm->pos.position_type = 1791 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1792 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1793 CAM_DEV_POS_PERIPH; 1794 1795 cdm->pos.cookie.bus = periph->path->bus; 1796 cdm->pos.generations[CAM_BUS_GENERATION]= 1797 xsoftc.bus_generation; 1798 cdm->pos.cookie.target = periph->path->target; 1799 cdm->pos.generations[CAM_TARGET_GENERATION] = 1800 periph->path->bus->generation; 1801 cdm->pos.cookie.device = periph->path->device; 1802 cdm->pos.generations[CAM_DEV_GENERATION] = 1803 periph->path->target->generation; 1804 cdm->pos.cookie.periph = periph; 1805 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1806 periph->path->device->generation; 1807 cdm->status = CAM_DEV_MATCH_MORE; 1808 return(0); 1809 } 1810 1811 j = cdm->num_matches; 1812 cdm->num_matches++; 1813 cdm->matches[j].type = DEV_MATCH_PERIPH; 1814 cdm->matches[j].result.periph_result.path_id = 1815 periph->path->bus->path_id; 1816 cdm->matches[j].result.periph_result.target_id = 1817 periph->path->target->target_id; 1818 cdm->matches[j].result.periph_result.target_lun = 1819 periph->path->device->lun_id; 1820 cdm->matches[j].result.periph_result.unit_number = 1821 periph->unit_number; 1822 strncpy(cdm->matches[j].result.periph_result.periph_name, 1823 periph->periph_name, DEV_IDLEN); 1824 } 1825 1826 return(1); 1827 } 1828 1829 static int 1830 xptedtmatch(struct ccb_dev_match *cdm) 1831 { 1832 int ret; 1833 1834 cdm->num_matches = 0; 1835 1836 /* 1837 * Check the bus list generation. If it has changed, the user 1838 * needs to reset everything and start over. 1839 */ 1840 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1841 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 1842 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 1843 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1844 return(0); 1845 } 1846 1847 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1848 && (cdm->pos.cookie.bus != NULL)) 1849 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 1850 xptedtbusfunc, cdm); 1851 else 1852 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 1853 1854 /* 1855 * If we get back 0, that means that we had to stop before fully 1856 * traversing the EDT. It also means that one of the subroutines 1857 * has set the status field to the proper value. If we get back 1, 1858 * we've fully traversed the EDT and copied out any matching entries. 1859 */ 1860 if (ret == 1) 1861 cdm->status = CAM_DEV_MATCH_LAST; 1862 1863 return(ret); 1864 } 1865 1866 static int 1867 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1868 { 1869 struct ccb_dev_match *cdm; 1870 1871 cdm = (struct ccb_dev_match *)arg; 1872 1873 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1874 && (cdm->pos.cookie.pdrv == pdrv) 1875 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1876 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1877 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1878 (*pdrv)->generation)) { 1879 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1880 return(0); 1881 } 1882 1883 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1884 && (cdm->pos.cookie.pdrv == pdrv) 1885 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1886 && (cdm->pos.cookie.periph != NULL)) 1887 return(xptpdperiphtraverse(pdrv, 1888 (struct cam_periph *)cdm->pos.cookie.periph, 1889 xptplistperiphfunc, arg)); 1890 else 1891 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 1892 } 1893 1894 static int 1895 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1896 { 1897 struct ccb_dev_match *cdm; 1898 dev_match_ret retval; 1899 1900 cdm = (struct ccb_dev_match *)arg; 1901 1902 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1903 1904 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1905 cdm->status = CAM_DEV_MATCH_ERROR; 1906 return(0); 1907 } 1908 1909 /* 1910 * If the copy flag is set, copy this peripheral out. 1911 */ 1912 if (retval & DM_RET_COPY) { 1913 int spaceleft, j; 1914 1915 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1916 sizeof(struct dev_match_result)); 1917 1918 /* 1919 * If we don't have enough space to put in another 1920 * match result, save our position and tell the 1921 * user there are more devices to check. 1922 */ 1923 if (spaceleft < sizeof(struct dev_match_result)) { 1924 struct periph_driver **pdrv; 1925 1926 pdrv = NULL; 1927 bzero(&cdm->pos, sizeof(cdm->pos)); 1928 cdm->pos.position_type = 1929 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1930 CAM_DEV_POS_PERIPH; 1931 1932 /* 1933 * This may look a bit non-sensical, but it is 1934 * actually quite logical. There are very few 1935 * peripheral drivers, and bloating every peripheral 1936 * structure with a pointer back to its parent 1937 * peripheral driver linker set entry would cost 1938 * more in the long run than doing this quick lookup. 1939 */ 1940 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 1941 if (strcmp((*pdrv)->driver_name, 1942 periph->periph_name) == 0) 1943 break; 1944 } 1945 1946 if (*pdrv == NULL) { 1947 cdm->status = CAM_DEV_MATCH_ERROR; 1948 return(0); 1949 } 1950 1951 cdm->pos.cookie.pdrv = pdrv; 1952 /* 1953 * The periph generation slot does double duty, as 1954 * does the periph pointer slot. They are used for 1955 * both edt and pdrv lookups and positioning. 1956 */ 1957 cdm->pos.cookie.periph = periph; 1958 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1959 (*pdrv)->generation; 1960 cdm->status = CAM_DEV_MATCH_MORE; 1961 return(0); 1962 } 1963 1964 j = cdm->num_matches; 1965 cdm->num_matches++; 1966 cdm->matches[j].type = DEV_MATCH_PERIPH; 1967 cdm->matches[j].result.periph_result.path_id = 1968 periph->path->bus->path_id; 1969 1970 /* 1971 * The transport layer peripheral doesn't have a target or 1972 * lun. 1973 */ 1974 if (periph->path->target) 1975 cdm->matches[j].result.periph_result.target_id = 1976 periph->path->target->target_id; 1977 else 1978 cdm->matches[j].result.periph_result.target_id = -1; 1979 1980 if (periph->path->device) 1981 cdm->matches[j].result.periph_result.target_lun = 1982 periph->path->device->lun_id; 1983 else 1984 cdm->matches[j].result.periph_result.target_lun = -1; 1985 1986 cdm->matches[j].result.periph_result.unit_number = 1987 periph->unit_number; 1988 strncpy(cdm->matches[j].result.periph_result.periph_name, 1989 periph->periph_name, DEV_IDLEN); 1990 } 1991 1992 return(1); 1993 } 1994 1995 static int 1996 xptperiphlistmatch(struct ccb_dev_match *cdm) 1997 { 1998 int ret; 1999 2000 cdm->num_matches = 0; 2001 2002 /* 2003 * At this point in the edt traversal function, we check the bus 2004 * list generation to make sure that no busses have been added or 2005 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2006 * For the peripheral driver list traversal function, however, we 2007 * don't have to worry about new peripheral driver types coming or 2008 * going; they're in a linker set, and therefore can't change 2009 * without a recompile. 2010 */ 2011 2012 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2013 && (cdm->pos.cookie.pdrv != NULL)) 2014 ret = xptpdrvtraverse( 2015 (struct periph_driver **)cdm->pos.cookie.pdrv, 2016 xptplistpdrvfunc, cdm); 2017 else 2018 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2019 2020 /* 2021 * If we get back 0, that means that we had to stop before fully 2022 * traversing the peripheral driver tree. It also means that one of 2023 * the subroutines has set the status field to the proper value. If 2024 * we get back 1, we've fully traversed the EDT and copied out any 2025 * matching entries. 2026 */ 2027 if (ret == 1) 2028 cdm->status = CAM_DEV_MATCH_LAST; 2029 2030 return(ret); 2031 } 2032 2033 static int 2034 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2035 { 2036 struct cam_eb *bus, *next_bus; 2037 int retval; 2038 2039 retval = 1; 2040 2041 mtx_lock(&xsoftc.xpt_topo_lock); 2042 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2043 bus != NULL; 2044 bus = next_bus) { 2045 next_bus = TAILQ_NEXT(bus, links); 2046 2047 mtx_unlock(&xsoftc.xpt_topo_lock); 2048 CAM_SIM_LOCK(bus->sim); 2049 retval = tr_func(bus, arg); 2050 CAM_SIM_UNLOCK(bus->sim); 2051 if (retval == 0) 2052 return(retval); 2053 mtx_lock(&xsoftc.xpt_topo_lock); 2054 } 2055 mtx_unlock(&xsoftc.xpt_topo_lock); 2056 2057 return(retval); 2058 } 2059 2060 int 2061 xpt_sim_opened(struct cam_sim *sim) 2062 { 2063 struct cam_eb *bus; 2064 struct cam_et *target; 2065 struct cam_ed *device; 2066 struct cam_periph *periph; 2067 2068 KASSERT(sim->refcount >= 1, ("sim->refcount >= 1")); 2069 mtx_assert(sim->mtx, MA_OWNED); 2070 2071 mtx_lock(&xsoftc.xpt_topo_lock); 2072 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 2073 if (bus->sim != sim) 2074 continue; 2075 2076 TAILQ_FOREACH(target, &bus->et_entries, links) { 2077 TAILQ_FOREACH(device, &target->ed_entries, links) { 2078 SLIST_FOREACH(periph, &device->periphs, 2079 periph_links) { 2080 if (periph->refcount > 0) { 2081 mtx_unlock(&xsoftc.xpt_topo_lock); 2082 return (1); 2083 } 2084 } 2085 } 2086 } 2087 } 2088 2089 mtx_unlock(&xsoftc.xpt_topo_lock); 2090 return (0); 2091 } 2092 2093 static int 2094 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2095 xpt_targetfunc_t *tr_func, void *arg) 2096 { 2097 struct cam_et *target, *next_target; 2098 int retval; 2099 2100 retval = 1; 2101 for (target = (start_target ? start_target : 2102 TAILQ_FIRST(&bus->et_entries)); 2103 target != NULL; target = next_target) { 2104 2105 next_target = TAILQ_NEXT(target, links); 2106 2107 retval = tr_func(target, arg); 2108 2109 if (retval == 0) 2110 return(retval); 2111 } 2112 2113 return(retval); 2114 } 2115 2116 static int 2117 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2118 xpt_devicefunc_t *tr_func, void *arg) 2119 { 2120 struct cam_ed *device, *next_device; 2121 int retval; 2122 2123 retval = 1; 2124 for (device = (start_device ? start_device : 2125 TAILQ_FIRST(&target->ed_entries)); 2126 device != NULL; 2127 device = next_device) { 2128 2129 next_device = TAILQ_NEXT(device, links); 2130 2131 retval = tr_func(device, arg); 2132 2133 if (retval == 0) 2134 return(retval); 2135 } 2136 2137 return(retval); 2138 } 2139 2140 static int 2141 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2142 xpt_periphfunc_t *tr_func, void *arg) 2143 { 2144 struct cam_periph *periph, *next_periph; 2145 int retval; 2146 2147 retval = 1; 2148 2149 for (periph = (start_periph ? start_periph : 2150 SLIST_FIRST(&device->periphs)); 2151 periph != NULL; 2152 periph = next_periph) { 2153 2154 next_periph = SLIST_NEXT(periph, periph_links); 2155 2156 retval = tr_func(periph, arg); 2157 if (retval == 0) 2158 return(retval); 2159 } 2160 2161 return(retval); 2162 } 2163 2164 static int 2165 xptpdrvtraverse(struct periph_driver **start_pdrv, 2166 xpt_pdrvfunc_t *tr_func, void *arg) 2167 { 2168 struct periph_driver **pdrv; 2169 int retval; 2170 2171 retval = 1; 2172 2173 /* 2174 * We don't traverse the peripheral driver list like we do the 2175 * other lists, because it is a linker set, and therefore cannot be 2176 * changed during runtime. If the peripheral driver list is ever 2177 * re-done to be something other than a linker set (i.e. it can 2178 * change while the system is running), the list traversal should 2179 * be modified to work like the other traversal functions. 2180 */ 2181 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2182 *pdrv != NULL; pdrv++) { 2183 retval = tr_func(pdrv, arg); 2184 2185 if (retval == 0) 2186 return(retval); 2187 } 2188 2189 return(retval); 2190 } 2191 2192 static int 2193 xptpdperiphtraverse(struct periph_driver **pdrv, 2194 struct cam_periph *start_periph, 2195 xpt_periphfunc_t *tr_func, void *arg) 2196 { 2197 struct cam_periph *periph, *next_periph; 2198 int retval; 2199 2200 retval = 1; 2201 2202 for (periph = (start_periph ? start_periph : 2203 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2204 periph = next_periph) { 2205 2206 next_periph = TAILQ_NEXT(periph, unit_links); 2207 2208 retval = tr_func(periph, arg); 2209 if (retval == 0) 2210 return(retval); 2211 } 2212 return(retval); 2213 } 2214 2215 static int 2216 xptdefbusfunc(struct cam_eb *bus, void *arg) 2217 { 2218 struct xpt_traverse_config *tr_config; 2219 2220 tr_config = (struct xpt_traverse_config *)arg; 2221 2222 if (tr_config->depth == XPT_DEPTH_BUS) { 2223 xpt_busfunc_t *tr_func; 2224 2225 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2226 2227 return(tr_func(bus, tr_config->tr_arg)); 2228 } else 2229 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2230 } 2231 2232 static int 2233 xptdeftargetfunc(struct cam_et *target, void *arg) 2234 { 2235 struct xpt_traverse_config *tr_config; 2236 2237 tr_config = (struct xpt_traverse_config *)arg; 2238 2239 if (tr_config->depth == XPT_DEPTH_TARGET) { 2240 xpt_targetfunc_t *tr_func; 2241 2242 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2243 2244 return(tr_func(target, tr_config->tr_arg)); 2245 } else 2246 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2247 } 2248 2249 static int 2250 xptdefdevicefunc(struct cam_ed *device, void *arg) 2251 { 2252 struct xpt_traverse_config *tr_config; 2253 2254 tr_config = (struct xpt_traverse_config *)arg; 2255 2256 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2257 xpt_devicefunc_t *tr_func; 2258 2259 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2260 2261 return(tr_func(device, tr_config->tr_arg)); 2262 } else 2263 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2264 } 2265 2266 static int 2267 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2268 { 2269 struct xpt_traverse_config *tr_config; 2270 xpt_periphfunc_t *tr_func; 2271 2272 tr_config = (struct xpt_traverse_config *)arg; 2273 2274 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2275 2276 /* 2277 * Unlike the other default functions, we don't check for depth 2278 * here. The peripheral driver level is the last level in the EDT, 2279 * so if we're here, we should execute the function in question. 2280 */ 2281 return(tr_func(periph, tr_config->tr_arg)); 2282 } 2283 2284 /* 2285 * Execute the given function for every bus in the EDT. 2286 */ 2287 static int 2288 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2289 { 2290 struct xpt_traverse_config tr_config; 2291 2292 tr_config.depth = XPT_DEPTH_BUS; 2293 tr_config.tr_func = tr_func; 2294 tr_config.tr_arg = arg; 2295 2296 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2297 } 2298 2299 /* 2300 * Execute the given function for every device in the EDT. 2301 */ 2302 static int 2303 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2304 { 2305 struct xpt_traverse_config tr_config; 2306 2307 tr_config.depth = XPT_DEPTH_DEVICE; 2308 tr_config.tr_func = tr_func; 2309 tr_config.tr_arg = arg; 2310 2311 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2312 } 2313 2314 static int 2315 xptsetasyncfunc(struct cam_ed *device, void *arg) 2316 { 2317 struct cam_path path; 2318 struct ccb_getdev cgd; 2319 struct async_node *cur_entry; 2320 2321 cur_entry = (struct async_node *)arg; 2322 2323 /* 2324 * Don't report unconfigured devices (Wildcard devs, 2325 * devices only for target mode, device instances 2326 * that have been invalidated but are waiting for 2327 * their last reference count to be released). 2328 */ 2329 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2330 return (1); 2331 2332 xpt_compile_path(&path, 2333 NULL, 2334 device->target->bus->path_id, 2335 device->target->target_id, 2336 device->lun_id); 2337 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2338 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2339 xpt_action((union ccb *)&cgd); 2340 cur_entry->callback(cur_entry->callback_arg, 2341 AC_FOUND_DEVICE, 2342 &path, &cgd); 2343 xpt_release_path(&path); 2344 2345 return(1); 2346 } 2347 2348 static int 2349 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2350 { 2351 struct cam_path path; 2352 struct ccb_pathinq cpi; 2353 struct async_node *cur_entry; 2354 2355 cur_entry = (struct async_node *)arg; 2356 2357 xpt_compile_path(&path, /*periph*/NULL, 2358 bus->sim->path_id, 2359 CAM_TARGET_WILDCARD, 2360 CAM_LUN_WILDCARD); 2361 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2362 cpi.ccb_h.func_code = XPT_PATH_INQ; 2363 xpt_action((union ccb *)&cpi); 2364 cur_entry->callback(cur_entry->callback_arg, 2365 AC_PATH_REGISTERED, 2366 &path, &cpi); 2367 xpt_release_path(&path); 2368 2369 return(1); 2370 } 2371 2372 static void 2373 xpt_action_sasync_cb(void *context, int pending) 2374 { 2375 struct async_node *cur_entry; 2376 struct xpt_task *task; 2377 uint32_t added; 2378 2379 task = (struct xpt_task *)context; 2380 cur_entry = (struct async_node *)task->data1; 2381 added = task->data2; 2382 2383 if ((added & AC_FOUND_DEVICE) != 0) { 2384 /* 2385 * Get this peripheral up to date with all 2386 * the currently existing devices. 2387 */ 2388 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2389 } 2390 if ((added & AC_PATH_REGISTERED) != 0) { 2391 /* 2392 * Get this peripheral up to date with all 2393 * the currently existing busses. 2394 */ 2395 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2396 } 2397 2398 free(task, M_CAMXPT); 2399 } 2400 2401 void 2402 xpt_action(union ccb *start_ccb) 2403 { 2404 2405 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2406 2407 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2408 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2409 } 2410 2411 void 2412 xpt_action_default(union ccb *start_ccb) 2413 { 2414 2415 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2416 2417 2418 switch (start_ccb->ccb_h.func_code) { 2419 case XPT_SCSI_IO: 2420 { 2421 struct cam_ed *device; 2422 #ifdef CAMDEBUG 2423 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2424 struct cam_path *path; 2425 2426 path = start_ccb->ccb_h.path; 2427 #endif 2428 2429 /* 2430 * For the sake of compatibility with SCSI-1 2431 * devices that may not understand the identify 2432 * message, we include lun information in the 2433 * second byte of all commands. SCSI-1 specifies 2434 * that luns are a 3 bit value and reserves only 3 2435 * bits for lun information in the CDB. Later 2436 * revisions of the SCSI spec allow for more than 8 2437 * luns, but have deprecated lun information in the 2438 * CDB. So, if the lun won't fit, we must omit. 2439 * 2440 * Also be aware that during initial probing for devices, 2441 * the inquiry information is unknown but initialized to 0. 2442 * This means that this code will be exercised while probing 2443 * devices with an ANSI revision greater than 2. 2444 */ 2445 device = start_ccb->ccb_h.path->device; 2446 if (device->protocol_version <= SCSI_REV_2 2447 && start_ccb->ccb_h.target_lun < 8 2448 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2449 2450 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2451 start_ccb->ccb_h.target_lun << 5; 2452 } 2453 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2454 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2455 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2456 &path->device->inq_data), 2457 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2458 cdb_str, sizeof(cdb_str)))); 2459 } 2460 /* FALLTHROUGH */ 2461 case XPT_TARGET_IO: 2462 case XPT_CONT_TARGET_IO: 2463 start_ccb->csio.sense_resid = 0; 2464 start_ccb->csio.resid = 0; 2465 /* FALLTHROUGH */ 2466 case XPT_ATA_IO: 2467 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) { 2468 start_ccb->ataio.resid = 0; 2469 } 2470 case XPT_RESET_DEV: 2471 case XPT_ENG_EXEC: 2472 { 2473 struct cam_path *path; 2474 int runq; 2475 2476 path = start_ccb->ccb_h.path; 2477 2478 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2479 if (path->device->qfrozen_cnt == 0) 2480 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2481 else 2482 runq = 0; 2483 if (runq != 0) 2484 xpt_run_dev_sendq(path->bus); 2485 break; 2486 } 2487 case XPT_CALC_GEOMETRY: 2488 { 2489 struct cam_sim *sim; 2490 2491 /* Filter out garbage */ 2492 if (start_ccb->ccg.block_size == 0 2493 || start_ccb->ccg.volume_size == 0) { 2494 start_ccb->ccg.cylinders = 0; 2495 start_ccb->ccg.heads = 0; 2496 start_ccb->ccg.secs_per_track = 0; 2497 start_ccb->ccb_h.status = CAM_REQ_CMP; 2498 break; 2499 } 2500 #ifdef PC98 2501 /* 2502 * In a PC-98 system, geometry translation depens on 2503 * the "real" device geometry obtained from mode page 4. 2504 * SCSI geometry translation is performed in the 2505 * initialization routine of the SCSI BIOS and the result 2506 * stored in host memory. If the translation is available 2507 * in host memory, use it. If not, rely on the default 2508 * translation the device driver performs. 2509 */ 2510 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2511 start_ccb->ccb_h.status = CAM_REQ_CMP; 2512 break; 2513 } 2514 #endif 2515 sim = start_ccb->ccb_h.path->bus->sim; 2516 (*(sim->sim_action))(sim, start_ccb); 2517 break; 2518 } 2519 case XPT_ABORT: 2520 { 2521 union ccb* abort_ccb; 2522 2523 abort_ccb = start_ccb->cab.abort_ccb; 2524 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2525 2526 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2527 struct cam_ccbq *ccbq; 2528 2529 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2530 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2531 abort_ccb->ccb_h.status = 2532 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2533 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2534 xpt_done(abort_ccb); 2535 start_ccb->ccb_h.status = CAM_REQ_CMP; 2536 break; 2537 } 2538 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2539 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2540 /* 2541 * We've caught this ccb en route to 2542 * the SIM. Flag it for abort and the 2543 * SIM will do so just before starting 2544 * real work on the CCB. 2545 */ 2546 abort_ccb->ccb_h.status = 2547 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2548 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2549 start_ccb->ccb_h.status = CAM_REQ_CMP; 2550 break; 2551 } 2552 } 2553 if (XPT_FC_IS_QUEUED(abort_ccb) 2554 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2555 /* 2556 * It's already completed but waiting 2557 * for our SWI to get to it. 2558 */ 2559 start_ccb->ccb_h.status = CAM_UA_ABORT; 2560 break; 2561 } 2562 /* 2563 * If we weren't able to take care of the abort request 2564 * in the XPT, pass the request down to the SIM for processing. 2565 */ 2566 } 2567 /* FALLTHROUGH */ 2568 case XPT_ACCEPT_TARGET_IO: 2569 case XPT_EN_LUN: 2570 case XPT_IMMED_NOTIFY: 2571 case XPT_NOTIFY_ACK: 2572 case XPT_RESET_BUS: 2573 case XPT_IMMEDIATE_NOTIFY: 2574 case XPT_NOTIFY_ACKNOWLEDGE: 2575 case XPT_GET_SIM_KNOB: 2576 case XPT_SET_SIM_KNOB: 2577 { 2578 struct cam_sim *sim; 2579 2580 sim = start_ccb->ccb_h.path->bus->sim; 2581 (*(sim->sim_action))(sim, start_ccb); 2582 break; 2583 } 2584 case XPT_PATH_INQ: 2585 { 2586 struct cam_sim *sim; 2587 2588 sim = start_ccb->ccb_h.path->bus->sim; 2589 (*(sim->sim_action))(sim, start_ccb); 2590 break; 2591 } 2592 case XPT_PATH_STATS: 2593 start_ccb->cpis.last_reset = 2594 start_ccb->ccb_h.path->bus->last_reset; 2595 start_ccb->ccb_h.status = CAM_REQ_CMP; 2596 break; 2597 case XPT_GDEV_TYPE: 2598 { 2599 struct cam_ed *dev; 2600 2601 dev = start_ccb->ccb_h.path->device; 2602 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2603 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2604 } else { 2605 struct ccb_getdev *cgd; 2606 struct cam_eb *bus; 2607 struct cam_et *tar; 2608 2609 cgd = &start_ccb->cgd; 2610 bus = cgd->ccb_h.path->bus; 2611 tar = cgd->ccb_h.path->target; 2612 cgd->protocol = dev->protocol; 2613 cgd->inq_data = dev->inq_data; 2614 cgd->ident_data = dev->ident_data; 2615 cgd->ccb_h.status = CAM_REQ_CMP; 2616 cgd->serial_num_len = dev->serial_num_len; 2617 if ((dev->serial_num_len > 0) 2618 && (dev->serial_num != NULL)) 2619 bcopy(dev->serial_num, cgd->serial_num, 2620 dev->serial_num_len); 2621 } 2622 break; 2623 } 2624 case XPT_GDEV_STATS: 2625 { 2626 struct cam_ed *dev; 2627 2628 dev = start_ccb->ccb_h.path->device; 2629 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2630 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2631 } else { 2632 struct ccb_getdevstats *cgds; 2633 struct cam_eb *bus; 2634 struct cam_et *tar; 2635 2636 cgds = &start_ccb->cgds; 2637 bus = cgds->ccb_h.path->bus; 2638 tar = cgds->ccb_h.path->target; 2639 cgds->dev_openings = dev->ccbq.dev_openings; 2640 cgds->dev_active = dev->ccbq.dev_active; 2641 cgds->devq_openings = dev->ccbq.devq_openings; 2642 cgds->devq_queued = dev->ccbq.queue.entries; 2643 cgds->held = dev->ccbq.held; 2644 cgds->last_reset = tar->last_reset; 2645 cgds->maxtags = dev->maxtags; 2646 cgds->mintags = dev->mintags; 2647 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2648 cgds->last_reset = bus->last_reset; 2649 cgds->ccb_h.status = CAM_REQ_CMP; 2650 } 2651 break; 2652 } 2653 case XPT_GDEVLIST: 2654 { 2655 struct cam_periph *nperiph; 2656 struct periph_list *periph_head; 2657 struct ccb_getdevlist *cgdl; 2658 u_int i; 2659 struct cam_ed *device; 2660 int found; 2661 2662 2663 found = 0; 2664 2665 /* 2666 * Don't want anyone mucking with our data. 2667 */ 2668 device = start_ccb->ccb_h.path->device; 2669 periph_head = &device->periphs; 2670 cgdl = &start_ccb->cgdl; 2671 2672 /* 2673 * Check and see if the list has changed since the user 2674 * last requested a list member. If so, tell them that the 2675 * list has changed, and therefore they need to start over 2676 * from the beginning. 2677 */ 2678 if ((cgdl->index != 0) && 2679 (cgdl->generation != device->generation)) { 2680 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2681 break; 2682 } 2683 2684 /* 2685 * Traverse the list of peripherals and attempt to find 2686 * the requested peripheral. 2687 */ 2688 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2689 (nperiph != NULL) && (i <= cgdl->index); 2690 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2691 if (i == cgdl->index) { 2692 strncpy(cgdl->periph_name, 2693 nperiph->periph_name, 2694 DEV_IDLEN); 2695 cgdl->unit_number = nperiph->unit_number; 2696 found = 1; 2697 } 2698 } 2699 if (found == 0) { 2700 cgdl->status = CAM_GDEVLIST_ERROR; 2701 break; 2702 } 2703 2704 if (nperiph == NULL) 2705 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2706 else 2707 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2708 2709 cgdl->index++; 2710 cgdl->generation = device->generation; 2711 2712 cgdl->ccb_h.status = CAM_REQ_CMP; 2713 break; 2714 } 2715 case XPT_DEV_MATCH: 2716 { 2717 dev_pos_type position_type; 2718 struct ccb_dev_match *cdm; 2719 2720 cdm = &start_ccb->cdm; 2721 2722 /* 2723 * There are two ways of getting at information in the EDT. 2724 * The first way is via the primary EDT tree. It starts 2725 * with a list of busses, then a list of targets on a bus, 2726 * then devices/luns on a target, and then peripherals on a 2727 * device/lun. The "other" way is by the peripheral driver 2728 * lists. The peripheral driver lists are organized by 2729 * peripheral driver. (obviously) So it makes sense to 2730 * use the peripheral driver list if the user is looking 2731 * for something like "da1", or all "da" devices. If the 2732 * user is looking for something on a particular bus/target 2733 * or lun, it's generally better to go through the EDT tree. 2734 */ 2735 2736 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2737 position_type = cdm->pos.position_type; 2738 else { 2739 u_int i; 2740 2741 position_type = CAM_DEV_POS_NONE; 2742 2743 for (i = 0; i < cdm->num_patterns; i++) { 2744 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2745 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2746 position_type = CAM_DEV_POS_EDT; 2747 break; 2748 } 2749 } 2750 2751 if (cdm->num_patterns == 0) 2752 position_type = CAM_DEV_POS_EDT; 2753 else if (position_type == CAM_DEV_POS_NONE) 2754 position_type = CAM_DEV_POS_PDRV; 2755 } 2756 2757 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2758 case CAM_DEV_POS_EDT: 2759 xptedtmatch(cdm); 2760 break; 2761 case CAM_DEV_POS_PDRV: 2762 xptperiphlistmatch(cdm); 2763 break; 2764 default: 2765 cdm->status = CAM_DEV_MATCH_ERROR; 2766 break; 2767 } 2768 2769 if (cdm->status == CAM_DEV_MATCH_ERROR) 2770 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2771 else 2772 start_ccb->ccb_h.status = CAM_REQ_CMP; 2773 2774 break; 2775 } 2776 case XPT_SASYNC_CB: 2777 { 2778 struct ccb_setasync *csa; 2779 struct async_node *cur_entry; 2780 struct async_list *async_head; 2781 u_int32_t added; 2782 2783 csa = &start_ccb->csa; 2784 added = csa->event_enable; 2785 async_head = &csa->ccb_h.path->device->asyncs; 2786 2787 /* 2788 * If there is already an entry for us, simply 2789 * update it. 2790 */ 2791 cur_entry = SLIST_FIRST(async_head); 2792 while (cur_entry != NULL) { 2793 if ((cur_entry->callback_arg == csa->callback_arg) 2794 && (cur_entry->callback == csa->callback)) 2795 break; 2796 cur_entry = SLIST_NEXT(cur_entry, links); 2797 } 2798 2799 if (cur_entry != NULL) { 2800 /* 2801 * If the request has no flags set, 2802 * remove the entry. 2803 */ 2804 added &= ~cur_entry->event_enable; 2805 if (csa->event_enable == 0) { 2806 SLIST_REMOVE(async_head, cur_entry, 2807 async_node, links); 2808 csa->ccb_h.path->device->refcount--; 2809 free(cur_entry, M_CAMXPT); 2810 } else { 2811 cur_entry->event_enable = csa->event_enable; 2812 } 2813 } else { 2814 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2815 M_NOWAIT); 2816 if (cur_entry == NULL) { 2817 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2818 break; 2819 } 2820 cur_entry->event_enable = csa->event_enable; 2821 cur_entry->callback_arg = csa->callback_arg; 2822 cur_entry->callback = csa->callback; 2823 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2824 csa->ccb_h.path->device->refcount++; 2825 } 2826 2827 /* 2828 * Need to decouple this operation via a taqskqueue so that 2829 * the locking doesn't become a mess. 2830 */ 2831 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 2832 struct xpt_task *task; 2833 2834 task = malloc(sizeof(struct xpt_task), M_CAMXPT, 2835 M_NOWAIT); 2836 if (task == NULL) { 2837 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2838 break; 2839 } 2840 2841 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 2842 task->data1 = cur_entry; 2843 task->data2 = added; 2844 taskqueue_enqueue(taskqueue_thread, &task->task); 2845 } 2846 2847 start_ccb->ccb_h.status = CAM_REQ_CMP; 2848 break; 2849 } 2850 case XPT_REL_SIMQ: 2851 { 2852 struct ccb_relsim *crs; 2853 struct cam_ed *dev; 2854 2855 crs = &start_ccb->crs; 2856 dev = crs->ccb_h.path->device; 2857 if (dev == NULL) { 2858 2859 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2860 break; 2861 } 2862 2863 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2864 2865 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 2866 /* Don't ever go below one opening */ 2867 if (crs->openings > 0) { 2868 xpt_dev_ccbq_resize(crs->ccb_h.path, 2869 crs->openings); 2870 2871 if (bootverbose) { 2872 xpt_print(crs->ccb_h.path, 2873 "tagged openings now %d\n", 2874 crs->openings); 2875 } 2876 } 2877 } 2878 } 2879 2880 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2881 2882 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2883 2884 /* 2885 * Just extend the old timeout and decrement 2886 * the freeze count so that a single timeout 2887 * is sufficient for releasing the queue. 2888 */ 2889 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2890 callout_stop(&dev->callout); 2891 } else { 2892 2893 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2894 } 2895 2896 callout_reset(&dev->callout, 2897 (crs->release_timeout * hz) / 1000, 2898 xpt_release_devq_timeout, dev); 2899 2900 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2901 2902 } 2903 2904 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2905 2906 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2907 /* 2908 * Decrement the freeze count so that a single 2909 * completion is still sufficient to unfreeze 2910 * the queue. 2911 */ 2912 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2913 } else { 2914 2915 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2916 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2917 } 2918 } 2919 2920 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2921 2922 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2923 || (dev->ccbq.dev_active == 0)) { 2924 2925 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2926 } else { 2927 2928 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2929 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2930 } 2931 } 2932 2933 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 2934 2935 xpt_release_devq(crs->ccb_h.path, /*count*/1, 2936 /*run_queue*/TRUE); 2937 } 2938 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 2939 start_ccb->ccb_h.status = CAM_REQ_CMP; 2940 break; 2941 } 2942 case XPT_DEBUG: { 2943 #ifdef CAMDEBUG 2944 #ifdef CAM_DEBUG_DELAY 2945 cam_debug_delay = CAM_DEBUG_DELAY; 2946 #endif 2947 cam_dflags = start_ccb->cdbg.flags; 2948 if (cam_dpath != NULL) { 2949 xpt_free_path(cam_dpath); 2950 cam_dpath = NULL; 2951 } 2952 2953 if (cam_dflags != CAM_DEBUG_NONE) { 2954 if (xpt_create_path(&cam_dpath, xpt_periph, 2955 start_ccb->ccb_h.path_id, 2956 start_ccb->ccb_h.target_id, 2957 start_ccb->ccb_h.target_lun) != 2958 CAM_REQ_CMP) { 2959 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2960 cam_dflags = CAM_DEBUG_NONE; 2961 } else { 2962 start_ccb->ccb_h.status = CAM_REQ_CMP; 2963 xpt_print(cam_dpath, "debugging flags now %x\n", 2964 cam_dflags); 2965 } 2966 } else { 2967 cam_dpath = NULL; 2968 start_ccb->ccb_h.status = CAM_REQ_CMP; 2969 } 2970 #else /* !CAMDEBUG */ 2971 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2972 #endif /* CAMDEBUG */ 2973 break; 2974 } 2975 case XPT_NOOP: 2976 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 2977 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 2978 start_ccb->ccb_h.status = CAM_REQ_CMP; 2979 break; 2980 default: 2981 case XPT_SDEV_TYPE: 2982 case XPT_TERM_IO: 2983 case XPT_ENG_INQ: 2984 /* XXX Implement */ 2985 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 2986 break; 2987 } 2988 } 2989 2990 void 2991 xpt_polled_action(union ccb *start_ccb) 2992 { 2993 u_int32_t timeout; 2994 struct cam_sim *sim; 2995 struct cam_devq *devq; 2996 struct cam_ed *dev; 2997 2998 2999 timeout = start_ccb->ccb_h.timeout; 3000 sim = start_ccb->ccb_h.path->bus->sim; 3001 devq = sim->devq; 3002 dev = start_ccb->ccb_h.path->device; 3003 3004 mtx_assert(sim->mtx, MA_OWNED); 3005 3006 /* 3007 * Steal an opening so that no other queued requests 3008 * can get it before us while we simulate interrupts. 3009 */ 3010 dev->ccbq.devq_openings--; 3011 dev->ccbq.dev_openings--; 3012 3013 while(((devq != NULL && devq->send_openings <= 0) || 3014 dev->ccbq.dev_openings < 0) && (--timeout > 0)) { 3015 DELAY(1000); 3016 (*(sim->sim_poll))(sim); 3017 camisr_runqueue(&sim->sim_doneq); 3018 } 3019 3020 dev->ccbq.devq_openings++; 3021 dev->ccbq.dev_openings++; 3022 3023 if (timeout != 0) { 3024 xpt_action(start_ccb); 3025 while(--timeout > 0) { 3026 (*(sim->sim_poll))(sim); 3027 camisr_runqueue(&sim->sim_doneq); 3028 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3029 != CAM_REQ_INPROG) 3030 break; 3031 DELAY(1000); 3032 } 3033 if (timeout == 0) { 3034 /* 3035 * XXX Is it worth adding a sim_timeout entry 3036 * point so we can attempt recovery? If 3037 * this is only used for dumps, I don't think 3038 * it is. 3039 */ 3040 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3041 } 3042 } else { 3043 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3044 } 3045 } 3046 3047 /* 3048 * Schedule a peripheral driver to receive a ccb when it's 3049 * target device has space for more transactions. 3050 */ 3051 void 3052 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3053 { 3054 struct cam_ed *device; 3055 int runq; 3056 3057 mtx_assert(perph->sim->mtx, MA_OWNED); 3058 3059 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3060 device = perph->path->device; 3061 if (periph_is_queued(perph)) { 3062 /* Simply reorder based on new priority */ 3063 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3064 (" change priority to %d\n", new_priority)); 3065 if (new_priority < perph->pinfo.priority) { 3066 camq_change_priority(&device->drvq, 3067 perph->pinfo.index, 3068 new_priority); 3069 } 3070 runq = 0; 3071 } else { 3072 /* New entry on the queue */ 3073 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3074 (" added periph to queue\n")); 3075 perph->pinfo.priority = new_priority; 3076 perph->pinfo.generation = ++device->drvq.generation; 3077 camq_insert(&device->drvq, &perph->pinfo); 3078 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3079 } 3080 if (runq != 0) { 3081 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3082 (" calling xpt_run_devq\n")); 3083 xpt_run_dev_allocq(perph->path->bus); 3084 } 3085 } 3086 3087 3088 /* 3089 * Schedule a device to run on a given queue. 3090 * If the device was inserted as a new entry on the queue, 3091 * return 1 meaning the device queue should be run. If we 3092 * were already queued, implying someone else has already 3093 * started the queue, return 0 so the caller doesn't attempt 3094 * to run the queue. 3095 */ 3096 int 3097 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3098 u_int32_t new_priority) 3099 { 3100 int retval; 3101 u_int32_t old_priority; 3102 3103 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3104 3105 old_priority = pinfo->priority; 3106 3107 /* 3108 * Are we already queued? 3109 */ 3110 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3111 /* Simply reorder based on new priority */ 3112 if (new_priority < old_priority) { 3113 camq_change_priority(queue, pinfo->index, 3114 new_priority); 3115 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3116 ("changed priority to %d\n", 3117 new_priority)); 3118 } 3119 retval = 0; 3120 } else { 3121 /* New entry on the queue */ 3122 if (new_priority < old_priority) 3123 pinfo->priority = new_priority; 3124 3125 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3126 ("Inserting onto queue\n")); 3127 pinfo->generation = ++queue->generation; 3128 camq_insert(queue, pinfo); 3129 retval = 1; 3130 } 3131 return (retval); 3132 } 3133 3134 static void 3135 xpt_run_dev_allocq(struct cam_eb *bus) 3136 { 3137 struct cam_devq *devq; 3138 3139 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3140 devq = bus->sim->devq; 3141 3142 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3143 (" qfrozen_cnt == 0x%x, entries == %d, " 3144 "openings == %d, active == %d\n", 3145 devq->alloc_queue.qfrozen_cnt, 3146 devq->alloc_queue.entries, 3147 devq->alloc_openings, 3148 devq->alloc_active)); 3149 3150 devq->alloc_queue.qfrozen_cnt++; 3151 while ((devq->alloc_queue.entries > 0) 3152 && (devq->alloc_openings > 0) 3153 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3154 struct cam_ed_qinfo *qinfo; 3155 struct cam_ed *device; 3156 union ccb *work_ccb; 3157 struct cam_periph *drv; 3158 struct camq *drvq; 3159 3160 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3161 CAMQ_HEAD); 3162 device = qinfo->device; 3163 3164 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3165 ("running device %p\n", device)); 3166 3167 drvq = &device->drvq; 3168 3169 #ifdef CAMDEBUG 3170 if (drvq->entries <= 0) { 3171 panic("xpt_run_dev_allocq: " 3172 "Device on queue without any work to do"); 3173 } 3174 #endif 3175 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3176 devq->alloc_openings--; 3177 devq->alloc_active++; 3178 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3179 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3180 drv->pinfo.priority); 3181 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3182 ("calling periph start\n")); 3183 drv->periph_start(drv, work_ccb); 3184 } else { 3185 /* 3186 * Malloc failure in alloc_ccb 3187 */ 3188 /* 3189 * XXX add us to a list to be run from free_ccb 3190 * if we don't have any ccbs active on this 3191 * device queue otherwise we may never get run 3192 * again. 3193 */ 3194 break; 3195 } 3196 3197 if (drvq->entries > 0) { 3198 /* We have more work. Attempt to reschedule */ 3199 xpt_schedule_dev_allocq(bus, device); 3200 } 3201 } 3202 devq->alloc_queue.qfrozen_cnt--; 3203 } 3204 3205 void 3206 xpt_run_dev_sendq(struct cam_eb *bus) 3207 { 3208 struct cam_devq *devq; 3209 3210 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3211 3212 devq = bus->sim->devq; 3213 3214 devq->send_queue.qfrozen_cnt++; 3215 while ((devq->send_queue.entries > 0) 3216 && (devq->send_openings > 0)) { 3217 struct cam_ed_qinfo *qinfo; 3218 struct cam_ed *device; 3219 union ccb *work_ccb; 3220 struct cam_sim *sim; 3221 3222 if (devq->send_queue.qfrozen_cnt > 1) { 3223 break; 3224 } 3225 3226 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3227 CAMQ_HEAD); 3228 device = qinfo->device; 3229 3230 /* 3231 * If the device has been "frozen", don't attempt 3232 * to run it. 3233 */ 3234 if (device->qfrozen_cnt > 0) { 3235 continue; 3236 } 3237 3238 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3239 ("running device %p\n", device)); 3240 3241 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3242 if (work_ccb == NULL) { 3243 printf("device on run queue with no ccbs???\n"); 3244 continue; 3245 } 3246 3247 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3248 3249 mtx_lock(&xsoftc.xpt_lock); 3250 if (xsoftc.num_highpower <= 0) { 3251 /* 3252 * We got a high power command, but we 3253 * don't have any available slots. Freeze 3254 * the device queue until we have a slot 3255 * available. 3256 */ 3257 device->qfrozen_cnt++; 3258 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3259 &work_ccb->ccb_h, 3260 xpt_links.stqe); 3261 3262 mtx_unlock(&xsoftc.xpt_lock); 3263 continue; 3264 } else { 3265 /* 3266 * Consume a high power slot while 3267 * this ccb runs. 3268 */ 3269 xsoftc.num_highpower--; 3270 } 3271 mtx_unlock(&xsoftc.xpt_lock); 3272 } 3273 devq->active_dev = device; 3274 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3275 3276 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3277 3278 devq->send_openings--; 3279 devq->send_active++; 3280 3281 if (device->ccbq.queue.entries > 0) 3282 xpt_schedule_dev_sendq(bus, device); 3283 3284 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3285 /* 3286 * The client wants to freeze the queue 3287 * after this CCB is sent. 3288 */ 3289 device->qfrozen_cnt++; 3290 } 3291 3292 /* In Target mode, the peripheral driver knows best... */ 3293 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3294 if ((device->inq_flags & SID_CmdQue) != 0 3295 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3296 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3297 else 3298 /* 3299 * Clear this in case of a retried CCB that 3300 * failed due to a rejected tag. 3301 */ 3302 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3303 } 3304 3305 /* 3306 * Device queues can be shared among multiple sim instances 3307 * that reside on different busses. Use the SIM in the queue 3308 * CCB's path, rather than the one in the bus that was passed 3309 * into this function. 3310 */ 3311 sim = work_ccb->ccb_h.path->bus->sim; 3312 (*(sim->sim_action))(sim, work_ccb); 3313 3314 devq->active_dev = NULL; 3315 } 3316 devq->send_queue.qfrozen_cnt--; 3317 } 3318 3319 /* 3320 * This function merges stuff from the slave ccb into the master ccb, while 3321 * keeping important fields in the master ccb constant. 3322 */ 3323 void 3324 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3325 { 3326 3327 /* 3328 * Pull fields that are valid for peripheral drivers to set 3329 * into the master CCB along with the CCB "payload". 3330 */ 3331 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3332 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3333 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3334 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3335 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3336 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3337 } 3338 3339 void 3340 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3341 { 3342 3343 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3344 ccb_h->pinfo.priority = priority; 3345 ccb_h->path = path; 3346 ccb_h->path_id = path->bus->path_id; 3347 if (path->target) 3348 ccb_h->target_id = path->target->target_id; 3349 else 3350 ccb_h->target_id = CAM_TARGET_WILDCARD; 3351 if (path->device) { 3352 ccb_h->target_lun = path->device->lun_id; 3353 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3354 } else { 3355 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3356 } 3357 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3358 ccb_h->flags = 0; 3359 } 3360 3361 /* Path manipulation functions */ 3362 cam_status 3363 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3364 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3365 { 3366 struct cam_path *path; 3367 cam_status status; 3368 3369 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3370 3371 if (path == NULL) { 3372 status = CAM_RESRC_UNAVAIL; 3373 return(status); 3374 } 3375 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3376 if (status != CAM_REQ_CMP) { 3377 free(path, M_CAMXPT); 3378 path = NULL; 3379 } 3380 *new_path_ptr = path; 3381 return (status); 3382 } 3383 3384 cam_status 3385 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3386 struct cam_periph *periph, path_id_t path_id, 3387 target_id_t target_id, lun_id_t lun_id) 3388 { 3389 struct cam_path *path; 3390 struct cam_eb *bus = NULL; 3391 cam_status status; 3392 int need_unlock = 0; 3393 3394 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3395 3396 if (path_id != CAM_BUS_WILDCARD) { 3397 bus = xpt_find_bus(path_id); 3398 if (bus != NULL) { 3399 need_unlock = 1; 3400 CAM_SIM_LOCK(bus->sim); 3401 } 3402 } 3403 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3404 if (need_unlock) 3405 CAM_SIM_UNLOCK(bus->sim); 3406 if (status != CAM_REQ_CMP) { 3407 free(path, M_CAMXPT); 3408 path = NULL; 3409 } 3410 *new_path_ptr = path; 3411 return (status); 3412 } 3413 3414 cam_status 3415 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3416 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3417 { 3418 struct cam_eb *bus; 3419 struct cam_et *target; 3420 struct cam_ed *device; 3421 cam_status status; 3422 3423 status = CAM_REQ_CMP; /* Completed without error */ 3424 target = NULL; /* Wildcarded */ 3425 device = NULL; /* Wildcarded */ 3426 3427 /* 3428 * We will potentially modify the EDT, so block interrupts 3429 * that may attempt to create cam paths. 3430 */ 3431 bus = xpt_find_bus(path_id); 3432 if (bus == NULL) { 3433 status = CAM_PATH_INVALID; 3434 } else { 3435 target = xpt_find_target(bus, target_id); 3436 if (target == NULL) { 3437 /* Create one */ 3438 struct cam_et *new_target; 3439 3440 new_target = xpt_alloc_target(bus, target_id); 3441 if (new_target == NULL) { 3442 status = CAM_RESRC_UNAVAIL; 3443 } else { 3444 target = new_target; 3445 } 3446 } 3447 if (target != NULL) { 3448 device = xpt_find_device(target, lun_id); 3449 if (device == NULL) { 3450 /* Create one */ 3451 struct cam_ed *new_device; 3452 3453 new_device = 3454 (*(bus->xport->alloc_device))(bus, 3455 target, 3456 lun_id); 3457 if (new_device == NULL) { 3458 status = CAM_RESRC_UNAVAIL; 3459 } else { 3460 device = new_device; 3461 } 3462 } 3463 } 3464 } 3465 3466 /* 3467 * Only touch the user's data if we are successful. 3468 */ 3469 if (status == CAM_REQ_CMP) { 3470 new_path->periph = perph; 3471 new_path->bus = bus; 3472 new_path->target = target; 3473 new_path->device = device; 3474 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3475 } else { 3476 if (device != NULL) 3477 xpt_release_device(bus, target, device); 3478 if (target != NULL) 3479 xpt_release_target(bus, target); 3480 if (bus != NULL) 3481 xpt_release_bus(bus); 3482 } 3483 return (status); 3484 } 3485 3486 void 3487 xpt_release_path(struct cam_path *path) 3488 { 3489 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3490 if (path->device != NULL) { 3491 xpt_release_device(path->bus, path->target, path->device); 3492 path->device = NULL; 3493 } 3494 if (path->target != NULL) { 3495 xpt_release_target(path->bus, path->target); 3496 path->target = NULL; 3497 } 3498 if (path->bus != NULL) { 3499 xpt_release_bus(path->bus); 3500 path->bus = NULL; 3501 } 3502 } 3503 3504 void 3505 xpt_free_path(struct cam_path *path) 3506 { 3507 3508 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3509 xpt_release_path(path); 3510 free(path, M_CAMXPT); 3511 } 3512 3513 3514 /* 3515 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3516 * in path1, 2 for match with wildcards in path2. 3517 */ 3518 int 3519 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3520 { 3521 int retval = 0; 3522 3523 if (path1->bus != path2->bus) { 3524 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3525 retval = 1; 3526 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3527 retval = 2; 3528 else 3529 return (-1); 3530 } 3531 if (path1->target != path2->target) { 3532 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3533 if (retval == 0) 3534 retval = 1; 3535 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3536 retval = 2; 3537 else 3538 return (-1); 3539 } 3540 if (path1->device != path2->device) { 3541 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3542 if (retval == 0) 3543 retval = 1; 3544 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3545 retval = 2; 3546 else 3547 return (-1); 3548 } 3549 return (retval); 3550 } 3551 3552 void 3553 xpt_print_path(struct cam_path *path) 3554 { 3555 3556 if (path == NULL) 3557 printf("(nopath): "); 3558 else { 3559 if (path->periph != NULL) 3560 printf("(%s%d:", path->periph->periph_name, 3561 path->periph->unit_number); 3562 else 3563 printf("(noperiph:"); 3564 3565 if (path->bus != NULL) 3566 printf("%s%d:%d:", path->bus->sim->sim_name, 3567 path->bus->sim->unit_number, 3568 path->bus->sim->bus_id); 3569 else 3570 printf("nobus:"); 3571 3572 if (path->target != NULL) 3573 printf("%d:", path->target->target_id); 3574 else 3575 printf("X:"); 3576 3577 if (path->device != NULL) 3578 printf("%d): ", path->device->lun_id); 3579 else 3580 printf("X): "); 3581 } 3582 } 3583 3584 void 3585 xpt_print(struct cam_path *path, const char *fmt, ...) 3586 { 3587 va_list ap; 3588 xpt_print_path(path); 3589 va_start(ap, fmt); 3590 vprintf(fmt, ap); 3591 va_end(ap); 3592 } 3593 3594 int 3595 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3596 { 3597 struct sbuf sb; 3598 3599 #ifdef INVARIANTS 3600 if (path != NULL && path->bus != NULL) 3601 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3602 #endif 3603 3604 sbuf_new(&sb, str, str_len, 0); 3605 3606 if (path == NULL) 3607 sbuf_printf(&sb, "(nopath): "); 3608 else { 3609 if (path->periph != NULL) 3610 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3611 path->periph->unit_number); 3612 else 3613 sbuf_printf(&sb, "(noperiph:"); 3614 3615 if (path->bus != NULL) 3616 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3617 path->bus->sim->unit_number, 3618 path->bus->sim->bus_id); 3619 else 3620 sbuf_printf(&sb, "nobus:"); 3621 3622 if (path->target != NULL) 3623 sbuf_printf(&sb, "%d:", path->target->target_id); 3624 else 3625 sbuf_printf(&sb, "X:"); 3626 3627 if (path->device != NULL) 3628 sbuf_printf(&sb, "%d): ", path->device->lun_id); 3629 else 3630 sbuf_printf(&sb, "X): "); 3631 } 3632 sbuf_finish(&sb); 3633 3634 return(sbuf_len(&sb)); 3635 } 3636 3637 path_id_t 3638 xpt_path_path_id(struct cam_path *path) 3639 { 3640 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3641 3642 return(path->bus->path_id); 3643 } 3644 3645 target_id_t 3646 xpt_path_target_id(struct cam_path *path) 3647 { 3648 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3649 3650 if (path->target != NULL) 3651 return (path->target->target_id); 3652 else 3653 return (CAM_TARGET_WILDCARD); 3654 } 3655 3656 lun_id_t 3657 xpt_path_lun_id(struct cam_path *path) 3658 { 3659 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3660 3661 if (path->device != NULL) 3662 return (path->device->lun_id); 3663 else 3664 return (CAM_LUN_WILDCARD); 3665 } 3666 3667 struct cam_sim * 3668 xpt_path_sim(struct cam_path *path) 3669 { 3670 3671 return (path->bus->sim); 3672 } 3673 3674 struct cam_periph* 3675 xpt_path_periph(struct cam_path *path) 3676 { 3677 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3678 3679 return (path->periph); 3680 } 3681 3682 /* 3683 * Release a CAM control block for the caller. Remit the cost of the structure 3684 * to the device referenced by the path. If the this device had no 'credits' 3685 * and peripheral drivers have registered async callbacks for this notification 3686 * call them now. 3687 */ 3688 void 3689 xpt_release_ccb(union ccb *free_ccb) 3690 { 3691 struct cam_path *path; 3692 struct cam_ed *device; 3693 struct cam_eb *bus; 3694 struct cam_sim *sim; 3695 3696 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3697 path = free_ccb->ccb_h.path; 3698 device = path->device; 3699 bus = path->bus; 3700 sim = bus->sim; 3701 3702 mtx_assert(sim->mtx, MA_OWNED); 3703 3704 cam_ccbq_release_opening(&device->ccbq); 3705 if (sim->ccb_count > sim->max_ccbs) { 3706 xpt_free_ccb(free_ccb); 3707 sim->ccb_count--; 3708 } else { 3709 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 3710 xpt_links.sle); 3711 } 3712 if (sim->devq == NULL) { 3713 return; 3714 } 3715 sim->devq->alloc_openings++; 3716 sim->devq->alloc_active--; 3717 /* XXX Turn this into an inline function - xpt_run_device?? */ 3718 if ((device_is_alloc_queued(device) == 0) 3719 && (device->drvq.entries > 0)) { 3720 xpt_schedule_dev_allocq(bus, device); 3721 } 3722 if (dev_allocq_is_runnable(sim->devq)) 3723 xpt_run_dev_allocq(bus); 3724 } 3725 3726 /* Functions accessed by SIM drivers */ 3727 3728 static struct xpt_xport xport_default = { 3729 .alloc_device = xpt_alloc_device_default, 3730 .action = xpt_action_default, 3731 .async = xpt_dev_async_default, 3732 }; 3733 3734 /* 3735 * A sim structure, listing the SIM entry points and instance 3736 * identification info is passed to xpt_bus_register to hook the SIM 3737 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3738 * for this new bus and places it in the array of busses and assigns 3739 * it a path_id. The path_id may be influenced by "hard wiring" 3740 * information specified by the user. Once interrupt services are 3741 * available, the bus will be probed. 3742 */ 3743 int32_t 3744 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3745 { 3746 struct cam_eb *new_bus; 3747 struct cam_eb *old_bus; 3748 struct ccb_pathinq cpi; 3749 struct cam_path path; 3750 cam_status status; 3751 3752 mtx_assert(sim->mtx, MA_OWNED); 3753 3754 sim->bus_id = bus; 3755 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3756 M_CAMXPT, M_NOWAIT); 3757 if (new_bus == NULL) { 3758 /* Couldn't satisfy request */ 3759 return (CAM_RESRC_UNAVAIL); 3760 } 3761 3762 if (strcmp(sim->sim_name, "xpt") != 0) { 3763 sim->path_id = 3764 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3765 } 3766 3767 TAILQ_INIT(&new_bus->et_entries); 3768 new_bus->path_id = sim->path_id; 3769 cam_sim_hold(sim); 3770 new_bus->sim = sim; 3771 timevalclear(&new_bus->last_reset); 3772 new_bus->flags = 0; 3773 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3774 new_bus->generation = 0; 3775 3776 mtx_lock(&xsoftc.xpt_topo_lock); 3777 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3778 while (old_bus != NULL 3779 && old_bus->path_id < new_bus->path_id) 3780 old_bus = TAILQ_NEXT(old_bus, links); 3781 if (old_bus != NULL) 3782 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3783 else 3784 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3785 xsoftc.bus_generation++; 3786 mtx_unlock(&xsoftc.xpt_topo_lock); 3787 3788 /* 3789 * Set a default transport so that a PATH_INQ can be issued to 3790 * the SIM. This will then allow for probing and attaching of 3791 * a more appropriate transport. 3792 */ 3793 new_bus->xport = &xport_default; 3794 3795 bzero(&path, sizeof(path)); 3796 status = xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 3797 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3798 if (status != CAM_REQ_CMP) 3799 printf("xpt_compile_path returned %d\n", status); 3800 3801 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 3802 cpi.ccb_h.func_code = XPT_PATH_INQ; 3803 xpt_action((union ccb *)&cpi); 3804 3805 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3806 switch (cpi.transport) { 3807 case XPORT_SPI: 3808 case XPORT_SAS: 3809 case XPORT_FC: 3810 case XPORT_USB: 3811 case XPORT_ISCSI: 3812 case XPORT_PPB: 3813 new_bus->xport = scsi_get_xport(); 3814 break; 3815 case XPORT_ATA: 3816 case XPORT_SATA: 3817 new_bus->xport = ata_get_xport(); 3818 break; 3819 default: 3820 new_bus->xport = &xport_default; 3821 break; 3822 } 3823 } 3824 3825 /* Notify interested parties */ 3826 if (sim->path_id != CAM_XPT_PATH_ID) { 3827 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 3828 } 3829 xpt_release_path(&path); 3830 return (CAM_SUCCESS); 3831 } 3832 3833 int32_t 3834 xpt_bus_deregister(path_id_t pathid) 3835 { 3836 struct cam_path bus_path; 3837 cam_status status; 3838 3839 status = xpt_compile_path(&bus_path, NULL, pathid, 3840 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3841 if (status != CAM_REQ_CMP) 3842 return (status); 3843 3844 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3845 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3846 3847 /* Release the reference count held while registered. */ 3848 xpt_release_bus(bus_path.bus); 3849 xpt_release_path(&bus_path); 3850 3851 return (CAM_REQ_CMP); 3852 } 3853 3854 static path_id_t 3855 xptnextfreepathid(void) 3856 { 3857 struct cam_eb *bus; 3858 path_id_t pathid; 3859 const char *strval; 3860 3861 pathid = 0; 3862 mtx_lock(&xsoftc.xpt_topo_lock); 3863 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3864 retry: 3865 /* Find an unoccupied pathid */ 3866 while (bus != NULL && bus->path_id <= pathid) { 3867 if (bus->path_id == pathid) 3868 pathid++; 3869 bus = TAILQ_NEXT(bus, links); 3870 } 3871 mtx_unlock(&xsoftc.xpt_topo_lock); 3872 3873 /* 3874 * Ensure that this pathid is not reserved for 3875 * a bus that may be registered in the future. 3876 */ 3877 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3878 ++pathid; 3879 /* Start the search over */ 3880 mtx_lock(&xsoftc.xpt_topo_lock); 3881 goto retry; 3882 } 3883 return (pathid); 3884 } 3885 3886 static path_id_t 3887 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3888 { 3889 path_id_t pathid; 3890 int i, dunit, val; 3891 char buf[32]; 3892 const char *dname; 3893 3894 pathid = CAM_XPT_PATH_ID; 3895 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3896 i = 0; 3897 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 3898 if (strcmp(dname, "scbus")) { 3899 /* Avoid a bit of foot shooting. */ 3900 continue; 3901 } 3902 if (dunit < 0) /* unwired?! */ 3903 continue; 3904 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 3905 if (sim_bus == val) { 3906 pathid = dunit; 3907 break; 3908 } 3909 } else if (sim_bus == 0) { 3910 /* Unspecified matches bus 0 */ 3911 pathid = dunit; 3912 break; 3913 } else { 3914 printf("Ambiguous scbus configuration for %s%d " 3915 "bus %d, cannot wire down. The kernel " 3916 "config entry for scbus%d should " 3917 "specify a controller bus.\n" 3918 "Scbus will be assigned dynamically.\n", 3919 sim_name, sim_unit, sim_bus, dunit); 3920 break; 3921 } 3922 } 3923 3924 if (pathid == CAM_XPT_PATH_ID) 3925 pathid = xptnextfreepathid(); 3926 return (pathid); 3927 } 3928 3929 void 3930 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 3931 { 3932 struct cam_eb *bus; 3933 struct cam_et *target, *next_target; 3934 struct cam_ed *device, *next_device; 3935 3936 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3937 3938 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 3939 3940 /* 3941 * Most async events come from a CAM interrupt context. In 3942 * a few cases, the error recovery code at the peripheral layer, 3943 * which may run from our SWI or a process context, may signal 3944 * deferred events with a call to xpt_async. 3945 */ 3946 3947 bus = path->bus; 3948 3949 if (async_code == AC_BUS_RESET) { 3950 /* Update our notion of when the last reset occurred */ 3951 microtime(&bus->last_reset); 3952 } 3953 3954 for (target = TAILQ_FIRST(&bus->et_entries); 3955 target != NULL; 3956 target = next_target) { 3957 3958 next_target = TAILQ_NEXT(target, links); 3959 3960 if (path->target != target 3961 && path->target->target_id != CAM_TARGET_WILDCARD 3962 && target->target_id != CAM_TARGET_WILDCARD) 3963 continue; 3964 3965 if (async_code == AC_SENT_BDR) { 3966 /* Update our notion of when the last reset occurred */ 3967 microtime(&path->target->last_reset); 3968 } 3969 3970 for (device = TAILQ_FIRST(&target->ed_entries); 3971 device != NULL; 3972 device = next_device) { 3973 3974 next_device = TAILQ_NEXT(device, links); 3975 3976 if (path->device != device 3977 && path->device->lun_id != CAM_LUN_WILDCARD 3978 && device->lun_id != CAM_LUN_WILDCARD) 3979 continue; 3980 3981 (*(bus->xport->async))(async_code, bus, 3982 target, device, 3983 async_arg); 3984 3985 xpt_async_bcast(&device->asyncs, async_code, 3986 path, async_arg); 3987 } 3988 } 3989 3990 /* 3991 * If this wasn't a fully wildcarded async, tell all 3992 * clients that want all async events. 3993 */ 3994 if (bus != xpt_periph->path->bus) 3995 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 3996 path, async_arg); 3997 } 3998 3999 static void 4000 xpt_async_bcast(struct async_list *async_head, 4001 u_int32_t async_code, 4002 struct cam_path *path, void *async_arg) 4003 { 4004 struct async_node *cur_entry; 4005 4006 cur_entry = SLIST_FIRST(async_head); 4007 while (cur_entry != NULL) { 4008 struct async_node *next_entry; 4009 /* 4010 * Grab the next list entry before we call the current 4011 * entry's callback. This is because the callback function 4012 * can delete its async callback entry. 4013 */ 4014 next_entry = SLIST_NEXT(cur_entry, links); 4015 if ((cur_entry->event_enable & async_code) != 0) 4016 cur_entry->callback(cur_entry->callback_arg, 4017 async_code, path, 4018 async_arg); 4019 cur_entry = next_entry; 4020 } 4021 } 4022 4023 static void 4024 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4025 struct cam_et *target, struct cam_ed *device, 4026 void *async_arg) 4027 { 4028 printf("xpt_dev_async called\n"); 4029 } 4030 4031 u_int32_t 4032 xpt_freeze_devq(struct cam_path *path, u_int count) 4033 { 4034 struct ccb_hdr *ccbh; 4035 4036 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4037 4038 path->device->qfrozen_cnt += count; 4039 4040 /* 4041 * Mark the last CCB in the queue as needing 4042 * to be requeued if the driver hasn't 4043 * changed it's state yet. This fixes a race 4044 * where a ccb is just about to be queued to 4045 * a controller driver when it's interrupt routine 4046 * freezes the queue. To completly close the 4047 * hole, controller drives must check to see 4048 * if a ccb's status is still CAM_REQ_INPROG 4049 * just before they queue 4050 * the CCB. See ahc_action/ahc_freeze_devq for 4051 * an example. 4052 */ 4053 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4054 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4055 ccbh->status = CAM_REQUEUE_REQ; 4056 return (path->device->qfrozen_cnt); 4057 } 4058 4059 u_int32_t 4060 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4061 { 4062 mtx_assert(sim->mtx, MA_OWNED); 4063 4064 sim->devq->send_queue.qfrozen_cnt += count; 4065 if (sim->devq->active_dev != NULL) { 4066 struct ccb_hdr *ccbh; 4067 4068 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4069 ccb_hdr_tailq); 4070 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4071 ccbh->status = CAM_REQUEUE_REQ; 4072 } 4073 return (sim->devq->send_queue.qfrozen_cnt); 4074 } 4075 4076 static void 4077 xpt_release_devq_timeout(void *arg) 4078 { 4079 struct cam_ed *device; 4080 4081 device = (struct cam_ed *)arg; 4082 4083 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4084 } 4085 4086 void 4087 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4088 { 4089 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4090 4091 xpt_release_devq_device(path->device, count, run_queue); 4092 } 4093 4094 static void 4095 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4096 { 4097 int rundevq; 4098 4099 rundevq = 0; 4100 if (dev->qfrozen_cnt > 0) { 4101 4102 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4103 dev->qfrozen_cnt -= count; 4104 if (dev->qfrozen_cnt == 0) { 4105 4106 /* 4107 * No longer need to wait for a successful 4108 * command completion. 4109 */ 4110 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4111 4112 /* 4113 * Remove any timeouts that might be scheduled 4114 * to release this queue. 4115 */ 4116 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4117 callout_stop(&dev->callout); 4118 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4119 } 4120 4121 /* 4122 * Now that we are unfrozen schedule the 4123 * device so any pending transactions are 4124 * run. 4125 */ 4126 if ((dev->ccbq.queue.entries > 0) 4127 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4128 && (run_queue != 0)) { 4129 rundevq = 1; 4130 } 4131 } 4132 } 4133 if (rundevq != 0) 4134 xpt_run_dev_sendq(dev->target->bus); 4135 } 4136 4137 void 4138 xpt_release_simq(struct cam_sim *sim, int run_queue) 4139 { 4140 struct camq *sendq; 4141 4142 mtx_assert(sim->mtx, MA_OWNED); 4143 4144 sendq = &(sim->devq->send_queue); 4145 if (sendq->qfrozen_cnt > 0) { 4146 4147 sendq->qfrozen_cnt--; 4148 if (sendq->qfrozen_cnt == 0) { 4149 struct cam_eb *bus; 4150 4151 /* 4152 * If there is a timeout scheduled to release this 4153 * sim queue, remove it. The queue frozen count is 4154 * already at 0. 4155 */ 4156 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4157 callout_stop(&sim->callout); 4158 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4159 } 4160 bus = xpt_find_bus(sim->path_id); 4161 4162 if (run_queue) { 4163 /* 4164 * Now that we are unfrozen run the send queue. 4165 */ 4166 xpt_run_dev_sendq(bus); 4167 } 4168 xpt_release_bus(bus); 4169 } 4170 } 4171 } 4172 4173 /* 4174 * XXX Appears to be unused. 4175 */ 4176 static void 4177 xpt_release_simq_timeout(void *arg) 4178 { 4179 struct cam_sim *sim; 4180 4181 sim = (struct cam_sim *)arg; 4182 xpt_release_simq(sim, /* run_queue */ TRUE); 4183 } 4184 4185 void 4186 xpt_done(union ccb *done_ccb) 4187 { 4188 struct cam_sim *sim; 4189 4190 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4191 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4192 /* 4193 * Queue up the request for handling by our SWI handler 4194 * any of the "non-immediate" type of ccbs. 4195 */ 4196 sim = done_ccb->ccb_h.path->bus->sim; 4197 switch (done_ccb->ccb_h.path->periph->type) { 4198 case CAM_PERIPH_BIO: 4199 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4200 sim_links.tqe); 4201 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4202 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4203 mtx_lock(&cam_simq_lock); 4204 TAILQ_INSERT_TAIL(&cam_simq, sim, 4205 links); 4206 sim->flags |= CAM_SIM_ON_DONEQ; 4207 mtx_unlock(&cam_simq_lock); 4208 } 4209 if ((done_ccb->ccb_h.path->periph->flags & 4210 CAM_PERIPH_POLLED) == 0) 4211 swi_sched(cambio_ih, 0); 4212 break; 4213 default: 4214 panic("unknown periph type %d", 4215 done_ccb->ccb_h.path->periph->type); 4216 } 4217 } 4218 } 4219 4220 union ccb * 4221 xpt_alloc_ccb() 4222 { 4223 union ccb *new_ccb; 4224 4225 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK); 4226 return (new_ccb); 4227 } 4228 4229 union ccb * 4230 xpt_alloc_ccb_nowait() 4231 { 4232 union ccb *new_ccb; 4233 4234 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT); 4235 return (new_ccb); 4236 } 4237 4238 void 4239 xpt_free_ccb(union ccb *free_ccb) 4240 { 4241 free(free_ccb, M_CAMXPT); 4242 } 4243 4244 4245 4246 /* Private XPT functions */ 4247 4248 /* 4249 * Get a CAM control block for the caller. Charge the structure to the device 4250 * referenced by the path. If the this device has no 'credits' then the 4251 * device already has the maximum number of outstanding operations under way 4252 * and we return NULL. If we don't have sufficient resources to allocate more 4253 * ccbs, we also return NULL. 4254 */ 4255 static union ccb * 4256 xpt_get_ccb(struct cam_ed *device) 4257 { 4258 union ccb *new_ccb; 4259 struct cam_sim *sim; 4260 4261 sim = device->sim; 4262 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4263 new_ccb = xpt_alloc_ccb_nowait(); 4264 if (new_ccb == NULL) { 4265 return (NULL); 4266 } 4267 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4268 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4269 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4270 xpt_links.sle); 4271 sim->ccb_count++; 4272 } 4273 cam_ccbq_take_opening(&device->ccbq); 4274 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4275 return (new_ccb); 4276 } 4277 4278 static void 4279 xpt_release_bus(struct cam_eb *bus) 4280 { 4281 4282 if ((--bus->refcount == 0) 4283 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4284 mtx_lock(&xsoftc.xpt_topo_lock); 4285 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4286 xsoftc.bus_generation++; 4287 mtx_unlock(&xsoftc.xpt_topo_lock); 4288 cam_sim_release(bus->sim); 4289 free(bus, M_CAMXPT); 4290 } 4291 } 4292 4293 static struct cam_et * 4294 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4295 { 4296 struct cam_et *target; 4297 4298 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT); 4299 if (target != NULL) { 4300 struct cam_et *cur_target; 4301 4302 TAILQ_INIT(&target->ed_entries); 4303 target->bus = bus; 4304 target->target_id = target_id; 4305 target->refcount = 1; 4306 target->generation = 0; 4307 timevalclear(&target->last_reset); 4308 /* 4309 * Hold a reference to our parent bus so it 4310 * will not go away before we do. 4311 */ 4312 bus->refcount++; 4313 4314 /* Insertion sort into our bus's target list */ 4315 cur_target = TAILQ_FIRST(&bus->et_entries); 4316 while (cur_target != NULL && cur_target->target_id < target_id) 4317 cur_target = TAILQ_NEXT(cur_target, links); 4318 4319 if (cur_target != NULL) { 4320 TAILQ_INSERT_BEFORE(cur_target, target, links); 4321 } else { 4322 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4323 } 4324 bus->generation++; 4325 } 4326 return (target); 4327 } 4328 4329 static void 4330 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4331 { 4332 4333 if ((--target->refcount == 0) 4334 && (TAILQ_FIRST(&target->ed_entries) == NULL)) { 4335 TAILQ_REMOVE(&bus->et_entries, target, links); 4336 bus->generation++; 4337 free(target, M_CAMXPT); 4338 xpt_release_bus(bus); 4339 } 4340 } 4341 4342 static struct cam_ed * 4343 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4344 lun_id_t lun_id) 4345 { 4346 struct cam_ed *device, *cur_device; 4347 4348 device = xpt_alloc_device(bus, target, lun_id); 4349 if (device == NULL) 4350 return (NULL); 4351 4352 device->mintags = 1; 4353 device->maxtags = 1; 4354 bus->sim->max_ccbs = device->ccbq.devq_openings; 4355 cur_device = TAILQ_FIRST(&target->ed_entries); 4356 while (cur_device != NULL && cur_device->lun_id < lun_id) 4357 cur_device = TAILQ_NEXT(cur_device, links); 4358 if (cur_device != NULL) { 4359 TAILQ_INSERT_BEFORE(cur_device, device, links); 4360 } else { 4361 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4362 } 4363 target->generation++; 4364 4365 return (device); 4366 } 4367 4368 struct cam_ed * 4369 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4370 { 4371 struct cam_ed *device; 4372 struct cam_devq *devq; 4373 cam_status status; 4374 4375 /* Make space for us in the device queue on our bus */ 4376 devq = bus->sim->devq; 4377 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4378 4379 if (status != CAM_REQ_CMP) { 4380 device = NULL; 4381 } else { 4382 device = (struct cam_ed *)malloc(sizeof(*device), 4383 M_CAMXPT, M_NOWAIT); 4384 } 4385 4386 if (device != NULL) { 4387 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4388 device->alloc_ccb_entry.device = device; 4389 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4390 device->send_ccb_entry.device = device; 4391 device->target = target; 4392 device->lun_id = lun_id; 4393 device->sim = bus->sim; 4394 /* Initialize our queues */ 4395 if (camq_init(&device->drvq, 0) != 0) { 4396 free(device, M_CAMXPT); 4397 return (NULL); 4398 } 4399 if (cam_ccbq_init(&device->ccbq, 4400 bus->sim->max_dev_openings) != 0) { 4401 camq_fini(&device->drvq); 4402 free(device, M_CAMXPT); 4403 return (NULL); 4404 } 4405 SLIST_INIT(&device->asyncs); 4406 SLIST_INIT(&device->periphs); 4407 device->generation = 0; 4408 device->owner = NULL; 4409 device->qfrozen_cnt = 0; 4410 device->flags = CAM_DEV_UNCONFIGURED; 4411 device->tag_delay_count = 0; 4412 device->tag_saved_openings = 0; 4413 device->refcount = 1; 4414 if (bus->sim->flags & CAM_SIM_MPSAFE) 4415 callout_init_mtx(&device->callout, bus->sim->mtx, 0); 4416 else 4417 callout_init_mtx(&device->callout, &Giant, 0); 4418 4419 /* 4420 * Hold a reference to our parent target so it 4421 * will not go away before we do. 4422 */ 4423 target->refcount++; 4424 4425 } 4426 return (device); 4427 } 4428 4429 static void 4430 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4431 struct cam_ed *device) 4432 { 4433 4434 if ((--device->refcount == 0) 4435 && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) { 4436 struct cam_devq *devq; 4437 4438 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4439 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4440 panic("Removing device while still queued for ccbs"); 4441 4442 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4443 callout_stop(&device->callout); 4444 4445 TAILQ_REMOVE(&target->ed_entries, device,links); 4446 target->generation++; 4447 bus->sim->max_ccbs -= device->ccbq.devq_openings; 4448 /* Release our slot in the devq */ 4449 devq = bus->sim->devq; 4450 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4451 camq_fini(&device->drvq); 4452 camq_fini(&device->ccbq.queue); 4453 free(device, M_CAMXPT); 4454 xpt_release_target(bus, target); 4455 } 4456 } 4457 4458 u_int32_t 4459 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4460 { 4461 int diff; 4462 int result; 4463 struct cam_ed *dev; 4464 4465 dev = path->device; 4466 4467 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4468 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4469 if (result == CAM_REQ_CMP && (diff < 0)) { 4470 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4471 } 4472 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4473 || (dev->inq_flags & SID_CmdQue) != 0) 4474 dev->tag_saved_openings = newopenings; 4475 /* Adjust the global limit */ 4476 dev->sim->max_ccbs += diff; 4477 return (result); 4478 } 4479 4480 static struct cam_eb * 4481 xpt_find_bus(path_id_t path_id) 4482 { 4483 struct cam_eb *bus; 4484 4485 mtx_lock(&xsoftc.xpt_topo_lock); 4486 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4487 bus != NULL; 4488 bus = TAILQ_NEXT(bus, links)) { 4489 if (bus->path_id == path_id) { 4490 bus->refcount++; 4491 break; 4492 } 4493 } 4494 mtx_unlock(&xsoftc.xpt_topo_lock); 4495 return (bus); 4496 } 4497 4498 static struct cam_et * 4499 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4500 { 4501 struct cam_et *target; 4502 4503 for (target = TAILQ_FIRST(&bus->et_entries); 4504 target != NULL; 4505 target = TAILQ_NEXT(target, links)) { 4506 if (target->target_id == target_id) { 4507 target->refcount++; 4508 break; 4509 } 4510 } 4511 return (target); 4512 } 4513 4514 static struct cam_ed * 4515 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4516 { 4517 struct cam_ed *device; 4518 4519 for (device = TAILQ_FIRST(&target->ed_entries); 4520 device != NULL; 4521 device = TAILQ_NEXT(device, links)) { 4522 if (device->lun_id == lun_id) { 4523 device->refcount++; 4524 break; 4525 } 4526 } 4527 return (device); 4528 } 4529 4530 static void 4531 xpt_start_tags(struct cam_path *path) 4532 { 4533 struct ccb_relsim crs; 4534 struct cam_ed *device; 4535 struct cam_sim *sim; 4536 int newopenings; 4537 4538 device = path->device; 4539 sim = path->bus->sim; 4540 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4541 xpt_freeze_devq(path, /*count*/1); 4542 device->inq_flags |= SID_CmdQue; 4543 if (device->tag_saved_openings != 0) 4544 newopenings = device->tag_saved_openings; 4545 else 4546 newopenings = min(device->maxtags, 4547 sim->max_tagged_dev_openings); 4548 xpt_dev_ccbq_resize(path, newopenings); 4549 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 4550 crs.ccb_h.func_code = XPT_REL_SIMQ; 4551 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4552 crs.openings 4553 = crs.release_timeout 4554 = crs.qfrozen_cnt 4555 = 0; 4556 xpt_action((union ccb *)&crs); 4557 } 4558 4559 static int busses_to_config; 4560 static int busses_to_reset; 4561 4562 static int 4563 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 4564 { 4565 4566 mtx_assert(bus->sim->mtx, MA_OWNED); 4567 4568 if (bus->path_id != CAM_XPT_PATH_ID) { 4569 struct cam_path path; 4570 struct ccb_pathinq cpi; 4571 int can_negotiate; 4572 4573 busses_to_config++; 4574 xpt_compile_path(&path, NULL, bus->path_id, 4575 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4576 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4577 cpi.ccb_h.func_code = XPT_PATH_INQ; 4578 xpt_action((union ccb *)&cpi); 4579 can_negotiate = cpi.hba_inquiry; 4580 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 4581 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 4582 && can_negotiate) 4583 busses_to_reset++; 4584 xpt_release_path(&path); 4585 } 4586 4587 return(1); 4588 } 4589 4590 static int 4591 xptconfigfunc(struct cam_eb *bus, void *arg) 4592 { 4593 struct cam_path *path; 4594 union ccb *work_ccb; 4595 4596 mtx_assert(bus->sim->mtx, MA_OWNED); 4597 4598 if (bus->path_id != CAM_XPT_PATH_ID) { 4599 cam_status status; 4600 int can_negotiate; 4601 4602 work_ccb = xpt_alloc_ccb_nowait(); 4603 if (work_ccb == NULL) { 4604 busses_to_config--; 4605 xpt_finishconfig(xpt_periph, NULL); 4606 return(0); 4607 } 4608 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 4609 CAM_TARGET_WILDCARD, 4610 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 4611 printf("xptconfigfunc: xpt_create_path failed with " 4612 "status %#x for bus %d\n", status, bus->path_id); 4613 printf("xptconfigfunc: halting bus configuration\n"); 4614 xpt_free_ccb(work_ccb); 4615 busses_to_config--; 4616 xpt_finishconfig(xpt_periph, NULL); 4617 return(0); 4618 } 4619 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 4620 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4621 xpt_action(work_ccb); 4622 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4623 printf("xptconfigfunc: CPI failed on bus %d " 4624 "with status %d\n", bus->path_id, 4625 work_ccb->ccb_h.status); 4626 xpt_finishconfig(xpt_periph, work_ccb); 4627 return(1); 4628 } 4629 4630 can_negotiate = work_ccb->cpi.hba_inquiry; 4631 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 4632 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 4633 && (can_negotiate != 0)) { 4634 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 4635 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 4636 work_ccb->ccb_h.cbfcnp = NULL; 4637 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 4638 ("Resetting Bus\n")); 4639 xpt_action(work_ccb); 4640 xpt_finishconfig(xpt_periph, work_ccb); 4641 } else { 4642 /* Act as though we performed a successful BUS RESET */ 4643 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 4644 xpt_finishconfig(xpt_periph, work_ccb); 4645 } 4646 } 4647 4648 return(1); 4649 } 4650 4651 static void 4652 xpt_config(void *arg) 4653 { 4654 /* 4655 * Now that interrupts are enabled, go find our devices 4656 */ 4657 4658 #ifdef CAMDEBUG 4659 /* Setup debugging flags and path */ 4660 #ifdef CAM_DEBUG_FLAGS 4661 cam_dflags = CAM_DEBUG_FLAGS; 4662 #else /* !CAM_DEBUG_FLAGS */ 4663 cam_dflags = CAM_DEBUG_NONE; 4664 #endif /* CAM_DEBUG_FLAGS */ 4665 #ifdef CAM_DEBUG_BUS 4666 if (cam_dflags != CAM_DEBUG_NONE) { 4667 /* 4668 * Locking is specifically omitted here. No SIMs have 4669 * registered yet, so xpt_create_path will only be searching 4670 * empty lists of targets and devices. 4671 */ 4672 if (xpt_create_path(&cam_dpath, xpt_periph, 4673 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4674 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4675 printf("xpt_config: xpt_create_path() failed for debug" 4676 " target %d:%d:%d, debugging disabled\n", 4677 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4678 cam_dflags = CAM_DEBUG_NONE; 4679 } 4680 } else 4681 cam_dpath = NULL; 4682 #else /* !CAM_DEBUG_BUS */ 4683 cam_dpath = NULL; 4684 #endif /* CAM_DEBUG_BUS */ 4685 #endif /* CAMDEBUG */ 4686 4687 /* 4688 * Scan all installed busses. 4689 */ 4690 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 4691 4692 if (busses_to_config == 0) { 4693 /* Call manually because we don't have any busses */ 4694 xpt_finishconfig(xpt_periph, NULL); 4695 } else { 4696 if (busses_to_reset > 0 && scsi_delay >= 2000) { 4697 printf("Waiting %d seconds for SCSI " 4698 "devices to settle\n", scsi_delay/1000); 4699 } 4700 xpt_for_all_busses(xptconfigfunc, NULL); 4701 } 4702 } 4703 4704 /* 4705 * If the given device only has one peripheral attached to it, and if that 4706 * peripheral is the passthrough driver, announce it. This insures that the 4707 * user sees some sort of announcement for every peripheral in their system. 4708 */ 4709 static int 4710 xptpassannouncefunc(struct cam_ed *device, void *arg) 4711 { 4712 struct cam_periph *periph; 4713 int i; 4714 4715 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 4716 periph = SLIST_NEXT(periph, periph_links), i++); 4717 4718 periph = SLIST_FIRST(&device->periphs); 4719 if ((i == 1) 4720 && (strncmp(periph->periph_name, "pass", 4) == 0)) 4721 xpt_announce_periph(periph, NULL); 4722 4723 return(1); 4724 } 4725 4726 static void 4727 xpt_finishconfig_task(void *context, int pending) 4728 { 4729 struct periph_driver **p_drv; 4730 int i; 4731 4732 if (busses_to_config == 0) { 4733 /* Register all the peripheral drivers */ 4734 /* XXX This will have to change when we have loadable modules */ 4735 p_drv = periph_drivers; 4736 for (i = 0; p_drv[i] != NULL; i++) { 4737 (*p_drv[i]->init)(); 4738 } 4739 4740 /* 4741 * Check for devices with no "standard" peripheral driver 4742 * attached. For any devices like that, announce the 4743 * passthrough driver so the user will see something. 4744 */ 4745 xpt_for_all_devices(xptpassannouncefunc, NULL); 4746 4747 /* Release our hook so that the boot can continue. */ 4748 config_intrhook_disestablish(xsoftc.xpt_config_hook); 4749 free(xsoftc.xpt_config_hook, M_CAMXPT); 4750 xsoftc.xpt_config_hook = NULL; 4751 } 4752 4753 free(context, M_CAMXPT); 4754 } 4755 4756 static void 4757 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 4758 { 4759 struct xpt_task *task; 4760 4761 if (done_ccb != NULL) { 4762 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4763 ("xpt_finishconfig\n")); 4764 switch(done_ccb->ccb_h.func_code) { 4765 case XPT_RESET_BUS: 4766 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 4767 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 4768 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 4769 done_ccb->crcn.flags = 0; 4770 xpt_action(done_ccb); 4771 return; 4772 } 4773 /* FALLTHROUGH */ 4774 case XPT_SCAN_BUS: 4775 default: 4776 xpt_free_path(done_ccb->ccb_h.path); 4777 busses_to_config--; 4778 break; 4779 } 4780 } 4781 4782 if (busses_to_config == 0) { 4783 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4784 if (task != NULL) { 4785 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4786 taskqueue_enqueue(taskqueue_thread, &task->task); 4787 } 4788 } 4789 4790 if (done_ccb != NULL) 4791 xpt_free_ccb(done_ccb); 4792 } 4793 4794 cam_status 4795 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 4796 struct cam_path *path) 4797 { 4798 struct ccb_setasync csa; 4799 cam_status status; 4800 int xptpath = 0; 4801 4802 if (path == NULL) { 4803 mtx_lock(&xsoftc.xpt_lock); 4804 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 4805 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4806 if (status != CAM_REQ_CMP) { 4807 mtx_unlock(&xsoftc.xpt_lock); 4808 return (status); 4809 } 4810 xptpath = 1; 4811 } 4812 4813 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 4814 csa.ccb_h.func_code = XPT_SASYNC_CB; 4815 csa.event_enable = event; 4816 csa.callback = cbfunc; 4817 csa.callback_arg = cbarg; 4818 xpt_action((union ccb *)&csa); 4819 status = csa.ccb_h.status; 4820 if (xptpath) { 4821 xpt_free_path(path); 4822 mtx_unlock(&xsoftc.xpt_lock); 4823 } 4824 return (status); 4825 } 4826 4827 static void 4828 xptaction(struct cam_sim *sim, union ccb *work_ccb) 4829 { 4830 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 4831 4832 switch (work_ccb->ccb_h.func_code) { 4833 /* Common cases first */ 4834 case XPT_PATH_INQ: /* Path routing inquiry */ 4835 { 4836 struct ccb_pathinq *cpi; 4837 4838 cpi = &work_ccb->cpi; 4839 cpi->version_num = 1; /* XXX??? */ 4840 cpi->hba_inquiry = 0; 4841 cpi->target_sprt = 0; 4842 cpi->hba_misc = 0; 4843 cpi->hba_eng_cnt = 0; 4844 cpi->max_target = 0; 4845 cpi->max_lun = 0; 4846 cpi->initiator_id = 0; 4847 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 4848 strncpy(cpi->hba_vid, "", HBA_IDLEN); 4849 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 4850 cpi->unit_number = sim->unit_number; 4851 cpi->bus_id = sim->bus_id; 4852 cpi->base_transfer_speed = 0; 4853 cpi->protocol = PROTO_UNSPECIFIED; 4854 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 4855 cpi->transport = XPORT_UNSPECIFIED; 4856 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 4857 cpi->ccb_h.status = CAM_REQ_CMP; 4858 xpt_done(work_ccb); 4859 break; 4860 } 4861 default: 4862 work_ccb->ccb_h.status = CAM_REQ_INVALID; 4863 xpt_done(work_ccb); 4864 break; 4865 } 4866 } 4867 4868 /* 4869 * The xpt as a "controller" has no interrupt sources, so polling 4870 * is a no-op. 4871 */ 4872 static void 4873 xptpoll(struct cam_sim *sim) 4874 { 4875 } 4876 4877 void 4878 xpt_lock_buses(void) 4879 { 4880 mtx_lock(&xsoftc.xpt_topo_lock); 4881 } 4882 4883 void 4884 xpt_unlock_buses(void) 4885 { 4886 mtx_unlock(&xsoftc.xpt_topo_lock); 4887 } 4888 4889 static void 4890 camisr(void *dummy) 4891 { 4892 cam_simq_t queue; 4893 struct cam_sim *sim; 4894 4895 mtx_lock(&cam_simq_lock); 4896 TAILQ_INIT(&queue); 4897 TAILQ_CONCAT(&queue, &cam_simq, links); 4898 mtx_unlock(&cam_simq_lock); 4899 4900 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 4901 TAILQ_REMOVE(&queue, sim, links); 4902 CAM_SIM_LOCK(sim); 4903 sim->flags &= ~CAM_SIM_ON_DONEQ; 4904 camisr_runqueue(&sim->sim_doneq); 4905 CAM_SIM_UNLOCK(sim); 4906 } 4907 } 4908 4909 static void 4910 camisr_runqueue(void *V_queue) 4911 { 4912 cam_isrq_t *queue = V_queue; 4913 struct ccb_hdr *ccb_h; 4914 4915 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 4916 int runq; 4917 4918 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 4919 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 4920 4921 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 4922 ("camisr\n")); 4923 4924 runq = FALSE; 4925 4926 if (ccb_h->flags & CAM_HIGH_POWER) { 4927 struct highpowerlist *hphead; 4928 union ccb *send_ccb; 4929 4930 mtx_lock(&xsoftc.xpt_lock); 4931 hphead = &xsoftc.highpowerq; 4932 4933 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 4934 4935 /* 4936 * Increment the count since this command is done. 4937 */ 4938 xsoftc.num_highpower++; 4939 4940 /* 4941 * Any high powered commands queued up? 4942 */ 4943 if (send_ccb != NULL) { 4944 4945 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 4946 mtx_unlock(&xsoftc.xpt_lock); 4947 4948 xpt_release_devq(send_ccb->ccb_h.path, 4949 /*count*/1, /*runqueue*/TRUE); 4950 } else 4951 mtx_unlock(&xsoftc.xpt_lock); 4952 } 4953 4954 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 4955 struct cam_ed *dev; 4956 4957 dev = ccb_h->path->device; 4958 4959 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 4960 ccb_h->path->bus->sim->devq->send_active--; 4961 ccb_h->path->bus->sim->devq->send_openings++; 4962 4963 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 4964 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 4965 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 4966 && (dev->ccbq.dev_active == 0))) { 4967 4968 xpt_release_devq(ccb_h->path, /*count*/1, 4969 /*run_queue*/TRUE); 4970 } 4971 4972 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4973 && (--dev->tag_delay_count == 0)) 4974 xpt_start_tags(ccb_h->path); 4975 4976 if ((dev->ccbq.queue.entries > 0) 4977 && (dev->qfrozen_cnt == 0) 4978 && (device_is_send_queued(dev) == 0)) { 4979 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 4980 dev); 4981 } 4982 } 4983 4984 if (ccb_h->status & CAM_RELEASE_SIMQ) { 4985 xpt_release_simq(ccb_h->path->bus->sim, 4986 /*run_queue*/TRUE); 4987 ccb_h->status &= ~CAM_RELEASE_SIMQ; 4988 runq = FALSE; 4989 } 4990 4991 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 4992 && (ccb_h->status & CAM_DEV_QFRZN)) { 4993 xpt_release_devq(ccb_h->path, /*count*/1, 4994 /*run_queue*/TRUE); 4995 ccb_h->status &= ~CAM_DEV_QFRZN; 4996 } else if (runq) { 4997 xpt_run_dev_sendq(ccb_h->path->bus); 4998 } 4999 5000 /* Call the peripheral driver's callback */ 5001 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5002 } 5003 } 5004
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