1 /*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/systm.h> 36 #include <sys/types.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/time.h> 40 #include <sys/conf.h> 41 #include <sys/fcntl.h> 42 #include <sys/interrupt.h> 43 #include <sys/sbuf.h> 44 #include <sys/taskqueue.h> 45 46 #include <sys/lock.h> 47 #include <sys/mutex.h> 48 #include <sys/sysctl.h> 49 #include <sys/kthread.h> 50 51 #include <cam/cam.h> 52 #include <cam/cam_ccb.h> 53 #include <cam/cam_periph.h> 54 #include <cam/cam_queue.h> 55 #include <cam/cam_sim.h> 56 #include <cam/cam_xpt.h> 57 #include <cam/cam_xpt_sim.h> 58 #include <cam/cam_xpt_periph.h> 59 #include <cam/cam_xpt_internal.h> 60 #include <cam/cam_debug.h> 61 #include <cam/cam_compat.h> 62 63 #include <cam/scsi/scsi_all.h> 64 #include <cam/scsi/scsi_message.h> 65 #include <cam/scsi/scsi_pass.h> 66 67 #include <machine/md_var.h> /* geometry translation */ 68 #include <machine/stdarg.h> /* for xpt_print below */ 69 70 #include "opt_cam.h" 71 72 /* 73 * This is the maximum number of high powered commands (e.g. start unit) 74 * that can be outstanding at a particular time. 75 */ 76 #ifndef CAM_MAX_HIGHPOWER 77 #define CAM_MAX_HIGHPOWER 4 78 #endif 79 80 /* Datastructures internal to the xpt layer */ 81 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 82 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 83 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 84 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 85 86 /* Object for defering XPT actions to a taskqueue */ 87 struct xpt_task { 88 struct task task; 89 void *data1; 90 uintptr_t data2; 91 }; 92 93 typedef enum { 94 XPT_FLAG_OPEN = 0x01 95 } xpt_flags; 96 97 struct xpt_softc { 98 xpt_flags flags; 99 u_int32_t xpt_generation; 100 101 /* number of high powered commands that can go through right now */ 102 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 103 int num_highpower; 104 105 /* queue for handling async rescan requests. */ 106 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 107 int buses_to_config; 108 int buses_config_done; 109 110 /* Registered busses */ 111 TAILQ_HEAD(,cam_eb) xpt_busses; 112 u_int bus_generation; 113 114 struct intr_config_hook *xpt_config_hook; 115 116 int boot_delay; 117 struct callout boot_callout; 118 119 struct mtx xpt_topo_lock; 120 struct mtx xpt_lock; 121 }; 122 123 typedef enum { 124 DM_RET_COPY = 0x01, 125 DM_RET_FLAG_MASK = 0x0f, 126 DM_RET_NONE = 0x00, 127 DM_RET_STOP = 0x10, 128 DM_RET_DESCEND = 0x20, 129 DM_RET_ERROR = 0x30, 130 DM_RET_ACTION_MASK = 0xf0 131 } dev_match_ret; 132 133 typedef enum { 134 XPT_DEPTH_BUS, 135 XPT_DEPTH_TARGET, 136 XPT_DEPTH_DEVICE, 137 XPT_DEPTH_PERIPH 138 } xpt_traverse_depth; 139 140 struct xpt_traverse_config { 141 xpt_traverse_depth depth; 142 void *tr_func; 143 void *tr_arg; 144 }; 145 146 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 147 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 148 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 149 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 150 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 151 152 /* Transport layer configuration information */ 153 static struct xpt_softc xsoftc; 154 155 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay); 156 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 157 &xsoftc.boot_delay, 0, "Bus registration wait time"); 158 159 /* Queues for our software interrupt handler */ 160 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 161 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 162 static cam_simq_t cam_simq; 163 static struct mtx cam_simq_lock; 164 165 /* Pointers to software interrupt handlers */ 166 static void *cambio_ih; 167 168 struct cam_periph *xpt_periph; 169 170 static periph_init_t xpt_periph_init; 171 172 static struct periph_driver xpt_driver = 173 { 174 xpt_periph_init, "xpt", 175 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 176 CAM_PERIPH_DRV_EARLY 177 }; 178 179 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 180 181 static d_open_t xptopen; 182 static d_close_t xptclose; 183 static d_ioctl_t xptioctl; 184 static d_ioctl_t xptdoioctl; 185 186 static struct cdevsw xpt_cdevsw = { 187 .d_version = D_VERSION, 188 .d_flags = 0, 189 .d_open = xptopen, 190 .d_close = xptclose, 191 .d_ioctl = xptioctl, 192 .d_name = "xpt", 193 }; 194 195 /* Storage for debugging datastructures */ 196 struct cam_path *cam_dpath; 197 u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 198 TUNABLE_INT("kern.cam.dflags", &cam_dflags); 199 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW, 200 &cam_dflags, 0, "Enabled debug flags"); 201 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 202 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay); 203 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW, 204 &cam_debug_delay, 0, "Delay in us after each debug message"); 205 206 /* Our boot-time initialization hook */ 207 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 208 209 static moduledata_t cam_moduledata = { 210 "cam", 211 cam_module_event_handler, 212 NULL 213 }; 214 215 static int xpt_init(void *); 216 217 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 218 MODULE_VERSION(cam, 1); 219 220 221 static void xpt_async_bcast(struct async_list *async_head, 222 u_int32_t async_code, 223 struct cam_path *path, 224 void *async_arg); 225 static path_id_t xptnextfreepathid(void); 226 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 227 static union ccb *xpt_get_ccb(struct cam_ed *device); 228 static void xpt_run_dev_allocq(struct cam_ed *device); 229 static void xpt_run_devq(struct cam_devq *devq); 230 static timeout_t xpt_release_devq_timeout; 231 static void xpt_release_simq_timeout(void *arg) __unused; 232 static void xpt_release_bus(struct cam_eb *bus); 233 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 234 int run_queue); 235 static struct cam_et* 236 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 237 static void xpt_release_target(struct cam_et *target); 238 static struct cam_eb* 239 xpt_find_bus(path_id_t path_id); 240 static struct cam_et* 241 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 242 static struct cam_ed* 243 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 244 static void xpt_config(void *arg); 245 static xpt_devicefunc_t xptpassannouncefunc; 246 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 247 static void xptpoll(struct cam_sim *sim); 248 static void camisr(void *); 249 static void camisr_runqueue(void *); 250 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 251 u_int num_patterns, struct cam_eb *bus); 252 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 253 u_int num_patterns, 254 struct cam_ed *device); 255 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 256 u_int num_patterns, 257 struct cam_periph *periph); 258 static xpt_busfunc_t xptedtbusfunc; 259 static xpt_targetfunc_t xptedttargetfunc; 260 static xpt_devicefunc_t xptedtdevicefunc; 261 static xpt_periphfunc_t xptedtperiphfunc; 262 static xpt_pdrvfunc_t xptplistpdrvfunc; 263 static xpt_periphfunc_t xptplistperiphfunc; 264 static int xptedtmatch(struct ccb_dev_match *cdm); 265 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 266 static int xptbustraverse(struct cam_eb *start_bus, 267 xpt_busfunc_t *tr_func, void *arg); 268 static int xpttargettraverse(struct cam_eb *bus, 269 struct cam_et *start_target, 270 xpt_targetfunc_t *tr_func, void *arg); 271 static int xptdevicetraverse(struct cam_et *target, 272 struct cam_ed *start_device, 273 xpt_devicefunc_t *tr_func, void *arg); 274 static int xptperiphtraverse(struct cam_ed *device, 275 struct cam_periph *start_periph, 276 xpt_periphfunc_t *tr_func, void *arg); 277 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 278 xpt_pdrvfunc_t *tr_func, void *arg); 279 static int xptpdperiphtraverse(struct periph_driver **pdrv, 280 struct cam_periph *start_periph, 281 xpt_periphfunc_t *tr_func, 282 void *arg); 283 static xpt_busfunc_t xptdefbusfunc; 284 static xpt_targetfunc_t xptdeftargetfunc; 285 static xpt_devicefunc_t xptdefdevicefunc; 286 static xpt_periphfunc_t xptdefperiphfunc; 287 static void xpt_finishconfig_task(void *context, int pending); 288 static void xpt_dev_async_default(u_int32_t async_code, 289 struct cam_eb *bus, 290 struct cam_et *target, 291 struct cam_ed *device, 292 void *async_arg); 293 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 294 struct cam_et *target, 295 lun_id_t lun_id); 296 static xpt_devicefunc_t xptsetasyncfunc; 297 static xpt_busfunc_t xptsetasyncbusfunc; 298 static cam_status xptregister(struct cam_periph *periph, 299 void *arg); 300 static __inline int periph_is_queued(struct cam_periph *periph); 301 static __inline int device_is_queued(struct cam_ed *device); 302 303 static __inline int 304 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 305 { 306 int retval; 307 308 if ((dev->ccbq.queue.entries > 0) && 309 (dev->ccbq.dev_openings > 0) && 310 (dev->ccbq.queue.qfrozen_cnt == 0)) { 311 /* 312 * The priority of a device waiting for controller 313 * resources is that of the highest priority CCB 314 * enqueued. 315 */ 316 retval = 317 xpt_schedule_dev(&devq->send_queue, 318 &dev->devq_entry.pinfo, 319 CAMQ_GET_PRIO(&dev->ccbq.queue)); 320 } else { 321 retval = 0; 322 } 323 return (retval); 324 } 325 326 static __inline int 327 periph_is_queued(struct cam_periph *periph) 328 { 329 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 330 } 331 332 static __inline int 333 device_is_queued(struct cam_ed *device) 334 { 335 return (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX); 336 } 337 338 static void 339 xpt_periph_init() 340 { 341 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 342 } 343 344 static void 345 xptdone(struct cam_periph *periph, union ccb *done_ccb) 346 { 347 /* Caller will release the CCB */ 348 wakeup(&done_ccb->ccb_h.cbfcnp); 349 } 350 351 static int 352 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 353 { 354 355 /* 356 * Only allow read-write access. 357 */ 358 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 359 return(EPERM); 360 361 /* 362 * We don't allow nonblocking access. 363 */ 364 if ((flags & O_NONBLOCK) != 0) { 365 printf("%s: can't do nonblocking access\n", devtoname(dev)); 366 return(ENODEV); 367 } 368 369 /* Mark ourselves open */ 370 mtx_lock(&xsoftc.xpt_lock); 371 xsoftc.flags |= XPT_FLAG_OPEN; 372 mtx_unlock(&xsoftc.xpt_lock); 373 374 return(0); 375 } 376 377 static int 378 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 379 { 380 381 /* Mark ourselves closed */ 382 mtx_lock(&xsoftc.xpt_lock); 383 xsoftc.flags &= ~XPT_FLAG_OPEN; 384 mtx_unlock(&xsoftc.xpt_lock); 385 386 return(0); 387 } 388 389 /* 390 * Don't automatically grab the xpt softc lock here even though this is going 391 * through the xpt device. The xpt device is really just a back door for 392 * accessing other devices and SIMs, so the right thing to do is to grab 393 * the appropriate SIM lock once the bus/SIM is located. 394 */ 395 static int 396 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 397 { 398 int error; 399 400 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 401 error = cam_compat_ioctl(dev, &cmd, &addr, &flag, td); 402 if (error == EAGAIN) 403 return (xptdoioctl(dev, cmd, addr, flag, td)); 404 } 405 return (error); 406 } 407 408 static int 409 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 410 { 411 int error; 412 413 error = 0; 414 415 switch(cmd) { 416 /* 417 * For the transport layer CAMIOCOMMAND ioctl, we really only want 418 * to accept CCB types that don't quite make sense to send through a 419 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 420 * in the CAM spec. 421 */ 422 case CAMIOCOMMAND: { 423 union ccb *ccb; 424 union ccb *inccb; 425 struct cam_eb *bus; 426 427 inccb = (union ccb *)addr; 428 429 bus = xpt_find_bus(inccb->ccb_h.path_id); 430 if (bus == NULL) 431 return (EINVAL); 432 433 switch (inccb->ccb_h.func_code) { 434 case XPT_SCAN_BUS: 435 case XPT_RESET_BUS: 436 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 437 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 438 xpt_release_bus(bus); 439 return (EINVAL); 440 } 441 break; 442 case XPT_SCAN_TGT: 443 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 444 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 445 xpt_release_bus(bus); 446 return (EINVAL); 447 } 448 break; 449 default: 450 break; 451 } 452 453 switch(inccb->ccb_h.func_code) { 454 case XPT_SCAN_BUS: 455 case XPT_RESET_BUS: 456 case XPT_PATH_INQ: 457 case XPT_ENG_INQ: 458 case XPT_SCAN_LUN: 459 case XPT_SCAN_TGT: 460 461 ccb = xpt_alloc_ccb(); 462 463 CAM_SIM_LOCK(bus->sim); 464 465 /* 466 * Create a path using the bus, target, and lun the 467 * user passed in. 468 */ 469 if (xpt_create_path(&ccb->ccb_h.path, NULL, 470 inccb->ccb_h.path_id, 471 inccb->ccb_h.target_id, 472 inccb->ccb_h.target_lun) != 473 CAM_REQ_CMP){ 474 error = EINVAL; 475 CAM_SIM_UNLOCK(bus->sim); 476 xpt_free_ccb(ccb); 477 break; 478 } 479 /* Ensure all of our fields are correct */ 480 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 481 inccb->ccb_h.pinfo.priority); 482 xpt_merge_ccb(ccb, inccb); 483 ccb->ccb_h.cbfcnp = xptdone; 484 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 485 bcopy(ccb, inccb, sizeof(union ccb)); 486 xpt_free_path(ccb->ccb_h.path); 487 xpt_free_ccb(ccb); 488 CAM_SIM_UNLOCK(bus->sim); 489 break; 490 491 case XPT_DEBUG: { 492 union ccb ccb; 493 494 /* 495 * This is an immediate CCB, so it's okay to 496 * allocate it on the stack. 497 */ 498 499 CAM_SIM_LOCK(bus->sim); 500 501 /* 502 * Create a path using the bus, target, and lun the 503 * user passed in. 504 */ 505 if (xpt_create_path(&ccb.ccb_h.path, NULL, 506 inccb->ccb_h.path_id, 507 inccb->ccb_h.target_id, 508 inccb->ccb_h.target_lun) != 509 CAM_REQ_CMP){ 510 error = EINVAL; 511 CAM_SIM_UNLOCK(bus->sim); 512 break; 513 } 514 /* Ensure all of our fields are correct */ 515 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 516 inccb->ccb_h.pinfo.priority); 517 xpt_merge_ccb(&ccb, inccb); 518 ccb.ccb_h.cbfcnp = xptdone; 519 xpt_action(&ccb); 520 bcopy(&ccb, inccb, sizeof(union ccb)); 521 xpt_free_path(ccb.ccb_h.path); 522 CAM_SIM_UNLOCK(bus->sim); 523 break; 524 525 } 526 case XPT_DEV_MATCH: { 527 struct cam_periph_map_info mapinfo; 528 struct cam_path *old_path; 529 530 /* 531 * We can't deal with physical addresses for this 532 * type of transaction. 533 */ 534 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 535 CAM_DATA_VADDR) { 536 error = EINVAL; 537 break; 538 } 539 540 /* 541 * Save this in case the caller had it set to 542 * something in particular. 543 */ 544 old_path = inccb->ccb_h.path; 545 546 /* 547 * We really don't need a path for the matching 548 * code. The path is needed because of the 549 * debugging statements in xpt_action(). They 550 * assume that the CCB has a valid path. 551 */ 552 inccb->ccb_h.path = xpt_periph->path; 553 554 bzero(&mapinfo, sizeof(mapinfo)); 555 556 /* 557 * Map the pattern and match buffers into kernel 558 * virtual address space. 559 */ 560 error = cam_periph_mapmem(inccb, &mapinfo); 561 562 if (error) { 563 inccb->ccb_h.path = old_path; 564 break; 565 } 566 567 /* 568 * This is an immediate CCB, we can send it on directly. 569 */ 570 CAM_SIM_LOCK(xpt_path_sim(xpt_periph->path)); 571 xpt_action(inccb); 572 CAM_SIM_UNLOCK(xpt_path_sim(xpt_periph->path)); 573 574 /* 575 * Map the buffers back into user space. 576 */ 577 cam_periph_unmapmem(inccb, &mapinfo); 578 579 inccb->ccb_h.path = old_path; 580 581 error = 0; 582 break; 583 } 584 default: 585 error = ENOTSUP; 586 break; 587 } 588 xpt_release_bus(bus); 589 break; 590 } 591 /* 592 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 593 * with the periphal driver name and unit name filled in. The other 594 * fields don't really matter as input. The passthrough driver name 595 * ("pass"), and unit number are passed back in the ccb. The current 596 * device generation number, and the index into the device peripheral 597 * driver list, and the status are also passed back. Note that 598 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 599 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 600 * (or rather should be) impossible for the device peripheral driver 601 * list to change since we look at the whole thing in one pass, and 602 * we do it with lock protection. 603 * 604 */ 605 case CAMGETPASSTHRU: { 606 union ccb *ccb; 607 struct cam_periph *periph; 608 struct periph_driver **p_drv; 609 char *name; 610 u_int unit; 611 u_int cur_generation; 612 int base_periph_found; 613 int splbreaknum; 614 615 ccb = (union ccb *)addr; 616 unit = ccb->cgdl.unit_number; 617 name = ccb->cgdl.periph_name; 618 /* 619 * Every 100 devices, we want to drop our lock protection to 620 * give the software interrupt handler a chance to run. 621 * Most systems won't run into this check, but this should 622 * avoid starvation in the software interrupt handler in 623 * large systems. 624 */ 625 splbreaknum = 100; 626 627 ccb = (union ccb *)addr; 628 629 base_periph_found = 0; 630 631 /* 632 * Sanity check -- make sure we don't get a null peripheral 633 * driver name. 634 */ 635 if (*ccb->cgdl.periph_name == '\0') { 636 error = EINVAL; 637 break; 638 } 639 640 /* Keep the list from changing while we traverse it */ 641 xpt_lock_buses(); 642 ptstartover: 643 cur_generation = xsoftc.xpt_generation; 644 645 /* first find our driver in the list of drivers */ 646 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 647 if (strcmp((*p_drv)->driver_name, name) == 0) 648 break; 649 650 if (*p_drv == NULL) { 651 xpt_unlock_buses(); 652 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 653 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 654 *ccb->cgdl.periph_name = '\0'; 655 ccb->cgdl.unit_number = 0; 656 error = ENOENT; 657 break; 658 } 659 660 /* 661 * Run through every peripheral instance of this driver 662 * and check to see whether it matches the unit passed 663 * in by the user. If it does, get out of the loops and 664 * find the passthrough driver associated with that 665 * peripheral driver. 666 */ 667 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 668 periph = TAILQ_NEXT(periph, unit_links)) { 669 670 if (periph->unit_number == unit) { 671 break; 672 } else if (--splbreaknum == 0) { 673 xpt_unlock_buses(); 674 xpt_lock_buses(); 675 splbreaknum = 100; 676 if (cur_generation != xsoftc.xpt_generation) 677 goto ptstartover; 678 } 679 } 680 /* 681 * If we found the peripheral driver that the user passed 682 * in, go through all of the peripheral drivers for that 683 * particular device and look for a passthrough driver. 684 */ 685 if (periph != NULL) { 686 struct cam_ed *device; 687 int i; 688 689 base_periph_found = 1; 690 device = periph->path->device; 691 for (i = 0, periph = SLIST_FIRST(&device->periphs); 692 periph != NULL; 693 periph = SLIST_NEXT(periph, periph_links), i++) { 694 /* 695 * Check to see whether we have a 696 * passthrough device or not. 697 */ 698 if (strcmp(periph->periph_name, "pass") == 0) { 699 /* 700 * Fill in the getdevlist fields. 701 */ 702 strcpy(ccb->cgdl.periph_name, 703 periph->periph_name); 704 ccb->cgdl.unit_number = 705 periph->unit_number; 706 if (SLIST_NEXT(periph, periph_links)) 707 ccb->cgdl.status = 708 CAM_GDEVLIST_MORE_DEVS; 709 else 710 ccb->cgdl.status = 711 CAM_GDEVLIST_LAST_DEVICE; 712 ccb->cgdl.generation = 713 device->generation; 714 ccb->cgdl.index = i; 715 /* 716 * Fill in some CCB header fields 717 * that the user may want. 718 */ 719 ccb->ccb_h.path_id = 720 periph->path->bus->path_id; 721 ccb->ccb_h.target_id = 722 periph->path->target->target_id; 723 ccb->ccb_h.target_lun = 724 periph->path->device->lun_id; 725 ccb->ccb_h.status = CAM_REQ_CMP; 726 break; 727 } 728 } 729 } 730 731 /* 732 * If the periph is null here, one of two things has 733 * happened. The first possibility is that we couldn't 734 * find the unit number of the particular peripheral driver 735 * that the user is asking about. e.g. the user asks for 736 * the passthrough driver for "da11". We find the list of 737 * "da" peripherals all right, but there is no unit 11. 738 * The other possibility is that we went through the list 739 * of peripheral drivers attached to the device structure, 740 * but didn't find one with the name "pass". Either way, 741 * we return ENOENT, since we couldn't find something. 742 */ 743 if (periph == NULL) { 744 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 745 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 746 *ccb->cgdl.periph_name = '\0'; 747 ccb->cgdl.unit_number = 0; 748 error = ENOENT; 749 /* 750 * It is unfortunate that this is even necessary, 751 * but there are many, many clueless users out there. 752 * If this is true, the user is looking for the 753 * passthrough driver, but doesn't have one in his 754 * kernel. 755 */ 756 if (base_periph_found == 1) { 757 printf("xptioctl: pass driver is not in the " 758 "kernel\n"); 759 printf("xptioctl: put \"device pass\" in " 760 "your kernel config file\n"); 761 } 762 } 763 xpt_unlock_buses(); 764 break; 765 } 766 default: 767 error = ENOTTY; 768 break; 769 } 770 771 return(error); 772 } 773 774 static int 775 cam_module_event_handler(module_t mod, int what, void *arg) 776 { 777 int error; 778 779 switch (what) { 780 case MOD_LOAD: 781 if ((error = xpt_init(NULL)) != 0) 782 return (error); 783 break; 784 case MOD_UNLOAD: 785 return EBUSY; 786 default: 787 return EOPNOTSUPP; 788 } 789 790 return 0; 791 } 792 793 static void 794 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 795 { 796 797 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 798 xpt_free_path(done_ccb->ccb_h.path); 799 xpt_free_ccb(done_ccb); 800 } else { 801 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 802 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 803 } 804 xpt_release_boot(); 805 } 806 807 /* thread to handle bus rescans */ 808 static void 809 xpt_scanner_thread(void *dummy) 810 { 811 union ccb *ccb; 812 struct cam_sim *sim; 813 814 xpt_lock_buses(); 815 for (;;) { 816 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 817 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 818 "ccb_scanq", 0); 819 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 820 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 821 xpt_unlock_buses(); 822 823 sim = ccb->ccb_h.path->bus->sim; 824 CAM_SIM_LOCK(sim); 825 xpt_action(ccb); 826 CAM_SIM_UNLOCK(sim); 827 828 xpt_lock_buses(); 829 } 830 } 831 } 832 833 void 834 xpt_rescan(union ccb *ccb) 835 { 836 struct ccb_hdr *hdr; 837 838 /* Prepare request */ 839 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 840 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 841 ccb->ccb_h.func_code = XPT_SCAN_BUS; 842 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 843 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 844 ccb->ccb_h.func_code = XPT_SCAN_TGT; 845 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 846 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 847 ccb->ccb_h.func_code = XPT_SCAN_LUN; 848 else { 849 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 850 xpt_free_path(ccb->ccb_h.path); 851 xpt_free_ccb(ccb); 852 return; 853 } 854 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 855 ccb->ccb_h.cbfcnp = xpt_rescan_done; 856 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 857 /* Don't make duplicate entries for the same paths. */ 858 xpt_lock_buses(); 859 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 860 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 861 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 862 wakeup(&xsoftc.ccb_scanq); 863 xpt_unlock_buses(); 864 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 865 xpt_free_path(ccb->ccb_h.path); 866 xpt_free_ccb(ccb); 867 return; 868 } 869 } 870 } 871 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 872 xsoftc.buses_to_config++; 873 wakeup(&xsoftc.ccb_scanq); 874 xpt_unlock_buses(); 875 } 876 877 /* Functions accessed by the peripheral drivers */ 878 static int 879 xpt_init(void *dummy) 880 { 881 struct cam_sim *xpt_sim; 882 struct cam_path *path; 883 struct cam_devq *devq; 884 cam_status status; 885 886 TAILQ_INIT(&xsoftc.xpt_busses); 887 TAILQ_INIT(&cam_simq); 888 TAILQ_INIT(&xsoftc.ccb_scanq); 889 STAILQ_INIT(&xsoftc.highpowerq); 890 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 891 892 mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF); 893 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 894 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF); 895 896 #ifdef CAM_BOOT_DELAY 897 /* 898 * Override this value at compile time to assist our users 899 * who don't use loader to boot a kernel. 900 */ 901 xsoftc.boot_delay = CAM_BOOT_DELAY; 902 #endif 903 /* 904 * The xpt layer is, itself, the equivelent of a SIM. 905 * Allow 16 ccbs in the ccb pool for it. This should 906 * give decent parallelism when we probe busses and 907 * perform other XPT functions. 908 */ 909 devq = cam_simq_alloc(16); 910 xpt_sim = cam_sim_alloc(xptaction, 911 xptpoll, 912 "xpt", 913 /*softc*/NULL, 914 /*unit*/0, 915 /*mtx*/&xsoftc.xpt_lock, 916 /*max_dev_transactions*/0, 917 /*max_tagged_dev_transactions*/0, 918 devq); 919 if (xpt_sim == NULL) 920 return (ENOMEM); 921 922 mtx_lock(&xsoftc.xpt_lock); 923 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 924 mtx_unlock(&xsoftc.xpt_lock); 925 printf("xpt_init: xpt_bus_register failed with status %#x," 926 " failing attach\n", status); 927 return (EINVAL); 928 } 929 930 /* 931 * Looking at the XPT from the SIM layer, the XPT is 932 * the equivelent of a peripheral driver. Allocate 933 * a peripheral driver entry for us. 934 */ 935 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 936 CAM_TARGET_WILDCARD, 937 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 938 mtx_unlock(&xsoftc.xpt_lock); 939 printf("xpt_init: xpt_create_path failed with status %#x," 940 " failing attach\n", status); 941 return (EINVAL); 942 } 943 944 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 945 path, NULL, 0, xpt_sim); 946 xpt_free_path(path); 947 mtx_unlock(&xsoftc.xpt_lock); 948 /* Install our software interrupt handlers */ 949 swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih); 950 /* 951 * Register a callback for when interrupts are enabled. 952 */ 953 xsoftc.xpt_config_hook = 954 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 955 M_CAMXPT, M_NOWAIT | M_ZERO); 956 if (xsoftc.xpt_config_hook == NULL) { 957 printf("xpt_init: Cannot malloc config hook " 958 "- failing attach\n"); 959 return (ENOMEM); 960 } 961 xsoftc.xpt_config_hook->ich_func = xpt_config; 962 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 963 free (xsoftc.xpt_config_hook, M_CAMXPT); 964 printf("xpt_init: config_intrhook_establish failed " 965 "- failing attach\n"); 966 } 967 968 return (0); 969 } 970 971 static cam_status 972 xptregister(struct cam_periph *periph, void *arg) 973 { 974 struct cam_sim *xpt_sim; 975 976 if (periph == NULL) { 977 printf("xptregister: periph was NULL!!\n"); 978 return(CAM_REQ_CMP_ERR); 979 } 980 981 xpt_sim = (struct cam_sim *)arg; 982 xpt_sim->softc = periph; 983 xpt_periph = periph; 984 periph->softc = NULL; 985 986 return(CAM_REQ_CMP); 987 } 988 989 int32_t 990 xpt_add_periph(struct cam_periph *periph) 991 { 992 struct cam_ed *device; 993 int32_t status; 994 struct periph_list *periph_head; 995 996 mtx_assert(periph->sim->mtx, MA_OWNED); 997 998 device = periph->path->device; 999 1000 periph_head = &device->periphs; 1001 1002 status = CAM_REQ_CMP; 1003 1004 if (device != NULL) { 1005 /* 1006 * Make room for this peripheral 1007 * so it will fit in the queue 1008 * when it's scheduled to run 1009 */ 1010 status = camq_resize(&device->drvq, 1011 device->drvq.array_size + 1); 1012 1013 device->generation++; 1014 1015 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1016 } 1017 1018 xpt_lock_buses(); 1019 xsoftc.xpt_generation++; 1020 xpt_unlock_buses(); 1021 1022 return (status); 1023 } 1024 1025 void 1026 xpt_remove_periph(struct cam_periph *periph, int topology_lock_held) 1027 { 1028 struct cam_ed *device; 1029 1030 mtx_assert(periph->sim->mtx, MA_OWNED); 1031 1032 device = periph->path->device; 1033 1034 if (device != NULL) { 1035 struct periph_list *periph_head; 1036 1037 periph_head = &device->periphs; 1038 1039 /* Release the slot for this peripheral */ 1040 camq_resize(&device->drvq, device->drvq.array_size - 1); 1041 1042 device->generation++; 1043 1044 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1045 } 1046 1047 if (topology_lock_held == 0) 1048 xpt_lock_buses(); 1049 1050 xsoftc.xpt_generation++; 1051 1052 if (topology_lock_held == 0) 1053 xpt_unlock_buses(); 1054 } 1055 1056 1057 void 1058 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1059 { 1060 struct cam_path *path = periph->path; 1061 1062 mtx_assert(periph->sim->mtx, MA_OWNED); 1063 1064 printf("%s%d at %s%d bus %d scbus%d target %d lun %d\n", 1065 periph->periph_name, periph->unit_number, 1066 path->bus->sim->sim_name, 1067 path->bus->sim->unit_number, 1068 path->bus->sim->bus_id, 1069 path->bus->path_id, 1070 path->target->target_id, 1071 path->device->lun_id); 1072 printf("%s%d: ", periph->periph_name, periph->unit_number); 1073 if (path->device->protocol == PROTO_SCSI) 1074 scsi_print_inquiry(&path->device->inq_data); 1075 else if (path->device->protocol == PROTO_ATA || 1076 path->device->protocol == PROTO_SATAPM) 1077 ata_print_ident(&path->device->ident_data); 1078 else if (path->device->protocol == PROTO_SEMB) 1079 semb_print_ident( 1080 (struct sep_identify_data *)&path->device->ident_data); 1081 else 1082 printf("Unknown protocol device\n"); 1083 if (bootverbose && path->device->serial_num_len > 0) { 1084 /* Don't wrap the screen - print only the first 60 chars */ 1085 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1086 periph->unit_number, path->device->serial_num); 1087 } 1088 /* Announce transport details. */ 1089 (*(path->bus->xport->announce))(periph); 1090 /* Announce command queueing. */ 1091 if (path->device->inq_flags & SID_CmdQue 1092 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1093 printf("%s%d: Command Queueing enabled\n", 1094 periph->periph_name, periph->unit_number); 1095 } 1096 /* Announce caller's details if they've passed in. */ 1097 if (announce_string != NULL) 1098 printf("%s%d: %s\n", periph->periph_name, 1099 periph->unit_number, announce_string); 1100 } 1101 1102 void 1103 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1104 { 1105 if (quirks != 0) { 1106 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1107 periph->unit_number, quirks, bit_string); 1108 } 1109 } 1110 1111 int 1112 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1113 { 1114 int ret = -1, l; 1115 struct ccb_dev_advinfo cdai; 1116 struct scsi_vpd_id_descriptor *idd; 1117 1118 mtx_assert(path->bus->sim->mtx, MA_OWNED); 1119 1120 memset(&cdai, 0, sizeof(cdai)); 1121 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1122 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1123 cdai.bufsiz = len; 1124 1125 if (!strcmp(attr, "GEOM::ident")) 1126 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1127 else if (!strcmp(attr, "GEOM::physpath")) 1128 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1129 else if (!strcmp(attr, "GEOM::lunid")) { 1130 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1131 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1132 } else 1133 goto out; 1134 1135 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO); 1136 if (cdai.buf == NULL) { 1137 ret = ENOMEM; 1138 goto out; 1139 } 1140 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1141 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1142 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1143 if (cdai.provsiz == 0) 1144 goto out; 1145 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) { 1146 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1147 cdai.provsiz, scsi_devid_is_lun_naa); 1148 if (idd == NULL) 1149 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1150 cdai.provsiz, scsi_devid_is_lun_eui64); 1151 if (idd == NULL) 1152 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1153 cdai.provsiz, scsi_devid_is_lun_t10); 1154 if (idd == NULL) 1155 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1156 cdai.provsiz, scsi_devid_is_lun_name); 1157 if (idd == NULL) 1158 goto out; 1159 ret = 0; 1160 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII || 1161 (idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) { 1162 l = strnlen(idd->identifier, idd->length); 1163 if (l < len) { 1164 bcopy(idd->identifier, buf, l); 1165 buf[l] = 0; 1166 } else 1167 ret = EFAULT; 1168 } else { 1169 if (idd->length * 2 < len) { 1170 for (l = 0; l < idd->length; l++) 1171 sprintf(buf + l * 2, "%02x", 1172 idd->identifier[l]); 1173 } else 1174 ret = EFAULT; 1175 } 1176 } else { 1177 ret = 0; 1178 if (strlcpy(buf, cdai.buf, len) >= len) 1179 ret = EFAULT; 1180 } 1181 1182 out: 1183 if (cdai.buf != NULL) 1184 free(cdai.buf, M_CAMXPT); 1185 return ret; 1186 } 1187 1188 static dev_match_ret 1189 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1190 struct cam_eb *bus) 1191 { 1192 dev_match_ret retval; 1193 int i; 1194 1195 retval = DM_RET_NONE; 1196 1197 /* 1198 * If we aren't given something to match against, that's an error. 1199 */ 1200 if (bus == NULL) 1201 return(DM_RET_ERROR); 1202 1203 /* 1204 * If there are no match entries, then this bus matches no 1205 * matter what. 1206 */ 1207 if ((patterns == NULL) || (num_patterns == 0)) 1208 return(DM_RET_DESCEND | DM_RET_COPY); 1209 1210 for (i = 0; i < num_patterns; i++) { 1211 struct bus_match_pattern *cur_pattern; 1212 1213 /* 1214 * If the pattern in question isn't for a bus node, we 1215 * aren't interested. However, we do indicate to the 1216 * calling routine that we should continue descending the 1217 * tree, since the user wants to match against lower-level 1218 * EDT elements. 1219 */ 1220 if (patterns[i].type != DEV_MATCH_BUS) { 1221 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1222 retval |= DM_RET_DESCEND; 1223 continue; 1224 } 1225 1226 cur_pattern = &patterns[i].pattern.bus_pattern; 1227 1228 /* 1229 * If they want to match any bus node, we give them any 1230 * device node. 1231 */ 1232 if (cur_pattern->flags == BUS_MATCH_ANY) { 1233 /* set the copy flag */ 1234 retval |= DM_RET_COPY; 1235 1236 /* 1237 * If we've already decided on an action, go ahead 1238 * and return. 1239 */ 1240 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1241 return(retval); 1242 } 1243 1244 /* 1245 * Not sure why someone would do this... 1246 */ 1247 if (cur_pattern->flags == BUS_MATCH_NONE) 1248 continue; 1249 1250 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1251 && (cur_pattern->path_id != bus->path_id)) 1252 continue; 1253 1254 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1255 && (cur_pattern->bus_id != bus->sim->bus_id)) 1256 continue; 1257 1258 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1259 && (cur_pattern->unit_number != bus->sim->unit_number)) 1260 continue; 1261 1262 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1263 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1264 DEV_IDLEN) != 0)) 1265 continue; 1266 1267 /* 1268 * If we get to this point, the user definitely wants 1269 * information on this bus. So tell the caller to copy the 1270 * data out. 1271 */ 1272 retval |= DM_RET_COPY; 1273 1274 /* 1275 * If the return action has been set to descend, then we 1276 * know that we've already seen a non-bus matching 1277 * expression, therefore we need to further descend the tree. 1278 * This won't change by continuing around the loop, so we 1279 * go ahead and return. If we haven't seen a non-bus 1280 * matching expression, we keep going around the loop until 1281 * we exhaust the matching expressions. We'll set the stop 1282 * flag once we fall out of the loop. 1283 */ 1284 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1285 return(retval); 1286 } 1287 1288 /* 1289 * If the return action hasn't been set to descend yet, that means 1290 * we haven't seen anything other than bus matching patterns. So 1291 * tell the caller to stop descending the tree -- the user doesn't 1292 * want to match against lower level tree elements. 1293 */ 1294 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1295 retval |= DM_RET_STOP; 1296 1297 return(retval); 1298 } 1299 1300 static dev_match_ret 1301 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1302 struct cam_ed *device) 1303 { 1304 dev_match_ret retval; 1305 int i; 1306 1307 retval = DM_RET_NONE; 1308 1309 /* 1310 * If we aren't given something to match against, that's an error. 1311 */ 1312 if (device == NULL) 1313 return(DM_RET_ERROR); 1314 1315 /* 1316 * If there are no match entries, then this device matches no 1317 * matter what. 1318 */ 1319 if ((patterns == NULL) || (num_patterns == 0)) 1320 return(DM_RET_DESCEND | DM_RET_COPY); 1321 1322 for (i = 0; i < num_patterns; i++) { 1323 struct device_match_pattern *cur_pattern; 1324 struct scsi_vpd_device_id *device_id_page; 1325 1326 /* 1327 * If the pattern in question isn't for a device node, we 1328 * aren't interested. 1329 */ 1330 if (patterns[i].type != DEV_MATCH_DEVICE) { 1331 if ((patterns[i].type == DEV_MATCH_PERIPH) 1332 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1333 retval |= DM_RET_DESCEND; 1334 continue; 1335 } 1336 1337 cur_pattern = &patterns[i].pattern.device_pattern; 1338 1339 /* Error out if mutually exclusive options are specified. */ 1340 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1341 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1342 return(DM_RET_ERROR); 1343 1344 /* 1345 * If they want to match any device node, we give them any 1346 * device node. 1347 */ 1348 if (cur_pattern->flags == DEV_MATCH_ANY) 1349 goto copy_dev_node; 1350 1351 /* 1352 * Not sure why someone would do this... 1353 */ 1354 if (cur_pattern->flags == DEV_MATCH_NONE) 1355 continue; 1356 1357 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1358 && (cur_pattern->path_id != device->target->bus->path_id)) 1359 continue; 1360 1361 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1362 && (cur_pattern->target_id != device->target->target_id)) 1363 continue; 1364 1365 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1366 && (cur_pattern->target_lun != device->lun_id)) 1367 continue; 1368 1369 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1370 && (cam_quirkmatch((caddr_t)&device->inq_data, 1371 (caddr_t)&cur_pattern->data.inq_pat, 1372 1, sizeof(cur_pattern->data.inq_pat), 1373 scsi_static_inquiry_match) == NULL)) 1374 continue; 1375 1376 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1377 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1378 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1379 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1380 device->device_id_len 1381 - SVPD_DEVICE_ID_HDR_LEN, 1382 cur_pattern->data.devid_pat.id, 1383 cur_pattern->data.devid_pat.id_len) != 0)) 1384 continue; 1385 1386 copy_dev_node: 1387 /* 1388 * If we get to this point, the user definitely wants 1389 * information on this device. So tell the caller to copy 1390 * the data out. 1391 */ 1392 retval |= DM_RET_COPY; 1393 1394 /* 1395 * If the return action has been set to descend, then we 1396 * know that we've already seen a peripheral matching 1397 * expression, therefore we need to further descend the tree. 1398 * This won't change by continuing around the loop, so we 1399 * go ahead and return. If we haven't seen a peripheral 1400 * matching expression, we keep going around the loop until 1401 * we exhaust the matching expressions. We'll set the stop 1402 * flag once we fall out of the loop. 1403 */ 1404 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1405 return(retval); 1406 } 1407 1408 /* 1409 * If the return action hasn't been set to descend yet, that means 1410 * we haven't seen any peripheral matching patterns. So tell the 1411 * caller to stop descending the tree -- the user doesn't want to 1412 * match against lower level tree elements. 1413 */ 1414 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1415 retval |= DM_RET_STOP; 1416 1417 return(retval); 1418 } 1419 1420 /* 1421 * Match a single peripheral against any number of match patterns. 1422 */ 1423 static dev_match_ret 1424 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1425 struct cam_periph *periph) 1426 { 1427 dev_match_ret retval; 1428 int i; 1429 1430 /* 1431 * If we aren't given something to match against, that's an error. 1432 */ 1433 if (periph == NULL) 1434 return(DM_RET_ERROR); 1435 1436 /* 1437 * If there are no match entries, then this peripheral matches no 1438 * matter what. 1439 */ 1440 if ((patterns == NULL) || (num_patterns == 0)) 1441 return(DM_RET_STOP | DM_RET_COPY); 1442 1443 /* 1444 * There aren't any nodes below a peripheral node, so there's no 1445 * reason to descend the tree any further. 1446 */ 1447 retval = DM_RET_STOP; 1448 1449 for (i = 0; i < num_patterns; i++) { 1450 struct periph_match_pattern *cur_pattern; 1451 1452 /* 1453 * If the pattern in question isn't for a peripheral, we 1454 * aren't interested. 1455 */ 1456 if (patterns[i].type != DEV_MATCH_PERIPH) 1457 continue; 1458 1459 cur_pattern = &patterns[i].pattern.periph_pattern; 1460 1461 /* 1462 * If they want to match on anything, then we will do so. 1463 */ 1464 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1465 /* set the copy flag */ 1466 retval |= DM_RET_COPY; 1467 1468 /* 1469 * We've already set the return action to stop, 1470 * since there are no nodes below peripherals in 1471 * the tree. 1472 */ 1473 return(retval); 1474 } 1475 1476 /* 1477 * Not sure why someone would do this... 1478 */ 1479 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1480 continue; 1481 1482 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1483 && (cur_pattern->path_id != periph->path->bus->path_id)) 1484 continue; 1485 1486 /* 1487 * For the target and lun id's, we have to make sure the 1488 * target and lun pointers aren't NULL. The xpt peripheral 1489 * has a wildcard target and device. 1490 */ 1491 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1492 && ((periph->path->target == NULL) 1493 ||(cur_pattern->target_id != periph->path->target->target_id))) 1494 continue; 1495 1496 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1497 && ((periph->path->device == NULL) 1498 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1499 continue; 1500 1501 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1502 && (cur_pattern->unit_number != periph->unit_number)) 1503 continue; 1504 1505 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1506 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1507 DEV_IDLEN) != 0)) 1508 continue; 1509 1510 /* 1511 * If we get to this point, the user definitely wants 1512 * information on this peripheral. So tell the caller to 1513 * copy the data out. 1514 */ 1515 retval |= DM_RET_COPY; 1516 1517 /* 1518 * The return action has already been set to stop, since 1519 * peripherals don't have any nodes below them in the EDT. 1520 */ 1521 return(retval); 1522 } 1523 1524 /* 1525 * If we get to this point, the peripheral that was passed in 1526 * doesn't match any of the patterns. 1527 */ 1528 return(retval); 1529 } 1530 1531 static int 1532 xptedtbusfunc(struct cam_eb *bus, void *arg) 1533 { 1534 struct ccb_dev_match *cdm; 1535 dev_match_ret retval; 1536 1537 cdm = (struct ccb_dev_match *)arg; 1538 1539 /* 1540 * If our position is for something deeper in the tree, that means 1541 * that we've already seen this node. So, we keep going down. 1542 */ 1543 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1544 && (cdm->pos.cookie.bus == bus) 1545 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1546 && (cdm->pos.cookie.target != NULL)) 1547 retval = DM_RET_DESCEND; 1548 else 1549 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1550 1551 /* 1552 * If we got an error, bail out of the search. 1553 */ 1554 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1555 cdm->status = CAM_DEV_MATCH_ERROR; 1556 return(0); 1557 } 1558 1559 /* 1560 * If the copy flag is set, copy this bus out. 1561 */ 1562 if (retval & DM_RET_COPY) { 1563 int spaceleft, j; 1564 1565 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1566 sizeof(struct dev_match_result)); 1567 1568 /* 1569 * If we don't have enough space to put in another 1570 * match result, save our position and tell the 1571 * user there are more devices to check. 1572 */ 1573 if (spaceleft < sizeof(struct dev_match_result)) { 1574 bzero(&cdm->pos, sizeof(cdm->pos)); 1575 cdm->pos.position_type = 1576 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1577 1578 cdm->pos.cookie.bus = bus; 1579 cdm->pos.generations[CAM_BUS_GENERATION]= 1580 xsoftc.bus_generation; 1581 cdm->status = CAM_DEV_MATCH_MORE; 1582 return(0); 1583 } 1584 j = cdm->num_matches; 1585 cdm->num_matches++; 1586 cdm->matches[j].type = DEV_MATCH_BUS; 1587 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1588 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1589 cdm->matches[j].result.bus_result.unit_number = 1590 bus->sim->unit_number; 1591 strncpy(cdm->matches[j].result.bus_result.dev_name, 1592 bus->sim->sim_name, DEV_IDLEN); 1593 } 1594 1595 /* 1596 * If the user is only interested in busses, there's no 1597 * reason to descend to the next level in the tree. 1598 */ 1599 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1600 return(1); 1601 1602 /* 1603 * If there is a target generation recorded, check it to 1604 * make sure the target list hasn't changed. 1605 */ 1606 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1607 && (bus == cdm->pos.cookie.bus) 1608 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1609 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1610 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1611 bus->generation)) { 1612 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1613 return(0); 1614 } 1615 1616 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1617 && (cdm->pos.cookie.bus == bus) 1618 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1619 && (cdm->pos.cookie.target != NULL)) 1620 return(xpttargettraverse(bus, 1621 (struct cam_et *)cdm->pos.cookie.target, 1622 xptedttargetfunc, arg)); 1623 else 1624 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1625 } 1626 1627 static int 1628 xptedttargetfunc(struct cam_et *target, void *arg) 1629 { 1630 struct ccb_dev_match *cdm; 1631 1632 cdm = (struct ccb_dev_match *)arg; 1633 1634 /* 1635 * If there is a device list generation recorded, check it to 1636 * make sure the device list hasn't changed. 1637 */ 1638 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1639 && (cdm->pos.cookie.bus == target->bus) 1640 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1641 && (cdm->pos.cookie.target == target) 1642 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1643 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1644 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1645 target->generation)) { 1646 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1647 return(0); 1648 } 1649 1650 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1651 && (cdm->pos.cookie.bus == target->bus) 1652 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1653 && (cdm->pos.cookie.target == target) 1654 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1655 && (cdm->pos.cookie.device != NULL)) 1656 return(xptdevicetraverse(target, 1657 (struct cam_ed *)cdm->pos.cookie.device, 1658 xptedtdevicefunc, arg)); 1659 else 1660 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 1661 } 1662 1663 static int 1664 xptedtdevicefunc(struct cam_ed *device, void *arg) 1665 { 1666 1667 struct ccb_dev_match *cdm; 1668 dev_match_ret retval; 1669 1670 cdm = (struct ccb_dev_match *)arg; 1671 1672 /* 1673 * If our position is for something deeper in the tree, that means 1674 * that we've already seen this node. So, we keep going down. 1675 */ 1676 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1677 && (cdm->pos.cookie.device == device) 1678 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1679 && (cdm->pos.cookie.periph != NULL)) 1680 retval = DM_RET_DESCEND; 1681 else 1682 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1683 device); 1684 1685 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1686 cdm->status = CAM_DEV_MATCH_ERROR; 1687 return(0); 1688 } 1689 1690 /* 1691 * If the copy flag is set, copy this device out. 1692 */ 1693 if (retval & DM_RET_COPY) { 1694 int spaceleft, j; 1695 1696 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1697 sizeof(struct dev_match_result)); 1698 1699 /* 1700 * If we don't have enough space to put in another 1701 * match result, save our position and tell the 1702 * user there are more devices to check. 1703 */ 1704 if (spaceleft < sizeof(struct dev_match_result)) { 1705 bzero(&cdm->pos, sizeof(cdm->pos)); 1706 cdm->pos.position_type = 1707 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1708 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1709 1710 cdm->pos.cookie.bus = device->target->bus; 1711 cdm->pos.generations[CAM_BUS_GENERATION]= 1712 xsoftc.bus_generation; 1713 cdm->pos.cookie.target = device->target; 1714 cdm->pos.generations[CAM_TARGET_GENERATION] = 1715 device->target->bus->generation; 1716 cdm->pos.cookie.device = device; 1717 cdm->pos.generations[CAM_DEV_GENERATION] = 1718 device->target->generation; 1719 cdm->status = CAM_DEV_MATCH_MORE; 1720 return(0); 1721 } 1722 j = cdm->num_matches; 1723 cdm->num_matches++; 1724 cdm->matches[j].type = DEV_MATCH_DEVICE; 1725 cdm->matches[j].result.device_result.path_id = 1726 device->target->bus->path_id; 1727 cdm->matches[j].result.device_result.target_id = 1728 device->target->target_id; 1729 cdm->matches[j].result.device_result.target_lun = 1730 device->lun_id; 1731 cdm->matches[j].result.device_result.protocol = 1732 device->protocol; 1733 bcopy(&device->inq_data, 1734 &cdm->matches[j].result.device_result.inq_data, 1735 sizeof(struct scsi_inquiry_data)); 1736 bcopy(&device->ident_data, 1737 &cdm->matches[j].result.device_result.ident_data, 1738 sizeof(struct ata_params)); 1739 1740 /* Let the user know whether this device is unconfigured */ 1741 if (device->flags & CAM_DEV_UNCONFIGURED) 1742 cdm->matches[j].result.device_result.flags = 1743 DEV_RESULT_UNCONFIGURED; 1744 else 1745 cdm->matches[j].result.device_result.flags = 1746 DEV_RESULT_NOFLAG; 1747 } 1748 1749 /* 1750 * If the user isn't interested in peripherals, don't descend 1751 * the tree any further. 1752 */ 1753 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1754 return(1); 1755 1756 /* 1757 * If there is a peripheral list generation recorded, make sure 1758 * it hasn't changed. 1759 */ 1760 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1761 && (device->target->bus == cdm->pos.cookie.bus) 1762 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1763 && (device->target == cdm->pos.cookie.target) 1764 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1765 && (device == cdm->pos.cookie.device) 1766 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1767 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1768 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1769 device->generation)){ 1770 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1771 return(0); 1772 } 1773 1774 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1775 && (cdm->pos.cookie.bus == device->target->bus) 1776 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1777 && (cdm->pos.cookie.target == device->target) 1778 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1779 && (cdm->pos.cookie.device == device) 1780 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1781 && (cdm->pos.cookie.periph != NULL)) 1782 return(xptperiphtraverse(device, 1783 (struct cam_periph *)cdm->pos.cookie.periph, 1784 xptedtperiphfunc, arg)); 1785 else 1786 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 1787 } 1788 1789 static int 1790 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1791 { 1792 struct ccb_dev_match *cdm; 1793 dev_match_ret retval; 1794 1795 cdm = (struct ccb_dev_match *)arg; 1796 1797 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1798 1799 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1800 cdm->status = CAM_DEV_MATCH_ERROR; 1801 return(0); 1802 } 1803 1804 /* 1805 * If the copy flag is set, copy this peripheral out. 1806 */ 1807 if (retval & DM_RET_COPY) { 1808 int spaceleft, j; 1809 1810 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1811 sizeof(struct dev_match_result)); 1812 1813 /* 1814 * If we don't have enough space to put in another 1815 * match result, save our position and tell the 1816 * user there are more devices to check. 1817 */ 1818 if (spaceleft < sizeof(struct dev_match_result)) { 1819 bzero(&cdm->pos, sizeof(cdm->pos)); 1820 cdm->pos.position_type = 1821 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1822 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1823 CAM_DEV_POS_PERIPH; 1824 1825 cdm->pos.cookie.bus = periph->path->bus; 1826 cdm->pos.generations[CAM_BUS_GENERATION]= 1827 xsoftc.bus_generation; 1828 cdm->pos.cookie.target = periph->path->target; 1829 cdm->pos.generations[CAM_TARGET_GENERATION] = 1830 periph->path->bus->generation; 1831 cdm->pos.cookie.device = periph->path->device; 1832 cdm->pos.generations[CAM_DEV_GENERATION] = 1833 periph->path->target->generation; 1834 cdm->pos.cookie.periph = periph; 1835 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1836 periph->path->device->generation; 1837 cdm->status = CAM_DEV_MATCH_MORE; 1838 return(0); 1839 } 1840 1841 j = cdm->num_matches; 1842 cdm->num_matches++; 1843 cdm->matches[j].type = DEV_MATCH_PERIPH; 1844 cdm->matches[j].result.periph_result.path_id = 1845 periph->path->bus->path_id; 1846 cdm->matches[j].result.periph_result.target_id = 1847 periph->path->target->target_id; 1848 cdm->matches[j].result.periph_result.target_lun = 1849 periph->path->device->lun_id; 1850 cdm->matches[j].result.periph_result.unit_number = 1851 periph->unit_number; 1852 strncpy(cdm->matches[j].result.periph_result.periph_name, 1853 periph->periph_name, DEV_IDLEN); 1854 } 1855 1856 return(1); 1857 } 1858 1859 static int 1860 xptedtmatch(struct ccb_dev_match *cdm) 1861 { 1862 int ret; 1863 1864 cdm->num_matches = 0; 1865 1866 /* 1867 * Check the bus list generation. If it has changed, the user 1868 * needs to reset everything and start over. 1869 */ 1870 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1871 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 1872 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 1873 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1874 return(0); 1875 } 1876 1877 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1878 && (cdm->pos.cookie.bus != NULL)) 1879 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 1880 xptedtbusfunc, cdm); 1881 else 1882 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 1883 1884 /* 1885 * If we get back 0, that means that we had to stop before fully 1886 * traversing the EDT. It also means that one of the subroutines 1887 * has set the status field to the proper value. If we get back 1, 1888 * we've fully traversed the EDT and copied out any matching entries. 1889 */ 1890 if (ret == 1) 1891 cdm->status = CAM_DEV_MATCH_LAST; 1892 1893 return(ret); 1894 } 1895 1896 static int 1897 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1898 { 1899 struct ccb_dev_match *cdm; 1900 1901 cdm = (struct ccb_dev_match *)arg; 1902 1903 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1904 && (cdm->pos.cookie.pdrv == pdrv) 1905 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1906 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1907 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1908 (*pdrv)->generation)) { 1909 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1910 return(0); 1911 } 1912 1913 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1914 && (cdm->pos.cookie.pdrv == pdrv) 1915 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1916 && (cdm->pos.cookie.periph != NULL)) 1917 return(xptpdperiphtraverse(pdrv, 1918 (struct cam_periph *)cdm->pos.cookie.periph, 1919 xptplistperiphfunc, arg)); 1920 else 1921 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 1922 } 1923 1924 static int 1925 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1926 { 1927 struct ccb_dev_match *cdm; 1928 dev_match_ret retval; 1929 1930 cdm = (struct ccb_dev_match *)arg; 1931 1932 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1933 1934 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1935 cdm->status = CAM_DEV_MATCH_ERROR; 1936 return(0); 1937 } 1938 1939 /* 1940 * If the copy flag is set, copy this peripheral out. 1941 */ 1942 if (retval & DM_RET_COPY) { 1943 int spaceleft, j; 1944 1945 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1946 sizeof(struct dev_match_result)); 1947 1948 /* 1949 * If we don't have enough space to put in another 1950 * match result, save our position and tell the 1951 * user there are more devices to check. 1952 */ 1953 if (spaceleft < sizeof(struct dev_match_result)) { 1954 struct periph_driver **pdrv; 1955 1956 pdrv = NULL; 1957 bzero(&cdm->pos, sizeof(cdm->pos)); 1958 cdm->pos.position_type = 1959 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1960 CAM_DEV_POS_PERIPH; 1961 1962 /* 1963 * This may look a bit non-sensical, but it is 1964 * actually quite logical. There are very few 1965 * peripheral drivers, and bloating every peripheral 1966 * structure with a pointer back to its parent 1967 * peripheral driver linker set entry would cost 1968 * more in the long run than doing this quick lookup. 1969 */ 1970 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 1971 if (strcmp((*pdrv)->driver_name, 1972 periph->periph_name) == 0) 1973 break; 1974 } 1975 1976 if (*pdrv == NULL) { 1977 cdm->status = CAM_DEV_MATCH_ERROR; 1978 return(0); 1979 } 1980 1981 cdm->pos.cookie.pdrv = pdrv; 1982 /* 1983 * The periph generation slot does double duty, as 1984 * does the periph pointer slot. They are used for 1985 * both edt and pdrv lookups and positioning. 1986 */ 1987 cdm->pos.cookie.periph = periph; 1988 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1989 (*pdrv)->generation; 1990 cdm->status = CAM_DEV_MATCH_MORE; 1991 return(0); 1992 } 1993 1994 j = cdm->num_matches; 1995 cdm->num_matches++; 1996 cdm->matches[j].type = DEV_MATCH_PERIPH; 1997 cdm->matches[j].result.periph_result.path_id = 1998 periph->path->bus->path_id; 1999 2000 /* 2001 * The transport layer peripheral doesn't have a target or 2002 * lun. 2003 */ 2004 if (periph->path->target) 2005 cdm->matches[j].result.periph_result.target_id = 2006 periph->path->target->target_id; 2007 else 2008 cdm->matches[j].result.periph_result.target_id = -1; 2009 2010 if (periph->path->device) 2011 cdm->matches[j].result.periph_result.target_lun = 2012 periph->path->device->lun_id; 2013 else 2014 cdm->matches[j].result.periph_result.target_lun = -1; 2015 2016 cdm->matches[j].result.periph_result.unit_number = 2017 periph->unit_number; 2018 strncpy(cdm->matches[j].result.periph_result.periph_name, 2019 periph->periph_name, DEV_IDLEN); 2020 } 2021 2022 return(1); 2023 } 2024 2025 static int 2026 xptperiphlistmatch(struct ccb_dev_match *cdm) 2027 { 2028 int ret; 2029 2030 cdm->num_matches = 0; 2031 2032 /* 2033 * At this point in the edt traversal function, we check the bus 2034 * list generation to make sure that no busses have been added or 2035 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2036 * For the peripheral driver list traversal function, however, we 2037 * don't have to worry about new peripheral driver types coming or 2038 * going; they're in a linker set, and therefore can't change 2039 * without a recompile. 2040 */ 2041 2042 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2043 && (cdm->pos.cookie.pdrv != NULL)) 2044 ret = xptpdrvtraverse( 2045 (struct periph_driver **)cdm->pos.cookie.pdrv, 2046 xptplistpdrvfunc, cdm); 2047 else 2048 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2049 2050 /* 2051 * If we get back 0, that means that we had to stop before fully 2052 * traversing the peripheral driver tree. It also means that one of 2053 * the subroutines has set the status field to the proper value. If 2054 * we get back 1, we've fully traversed the EDT and copied out any 2055 * matching entries. 2056 */ 2057 if (ret == 1) 2058 cdm->status = CAM_DEV_MATCH_LAST; 2059 2060 return(ret); 2061 } 2062 2063 static int 2064 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2065 { 2066 struct cam_eb *bus, *next_bus; 2067 int retval; 2068 2069 retval = 1; 2070 2071 xpt_lock_buses(); 2072 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2073 bus != NULL; 2074 bus = next_bus) { 2075 2076 bus->refcount++; 2077 2078 /* 2079 * XXX The locking here is obviously very complex. We 2080 * should work to simplify it. 2081 */ 2082 xpt_unlock_buses(); 2083 CAM_SIM_LOCK(bus->sim); 2084 retval = tr_func(bus, arg); 2085 CAM_SIM_UNLOCK(bus->sim); 2086 2087 xpt_lock_buses(); 2088 next_bus = TAILQ_NEXT(bus, links); 2089 xpt_unlock_buses(); 2090 2091 xpt_release_bus(bus); 2092 2093 if (retval == 0) 2094 return(retval); 2095 xpt_lock_buses(); 2096 } 2097 xpt_unlock_buses(); 2098 2099 return(retval); 2100 } 2101 2102 static int 2103 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2104 xpt_targetfunc_t *tr_func, void *arg) 2105 { 2106 struct cam_et *target, *next_target; 2107 int retval; 2108 2109 mtx_assert(bus->sim->mtx, MA_OWNED); 2110 retval = 1; 2111 for (target = (start_target ? start_target : 2112 TAILQ_FIRST(&bus->et_entries)); 2113 target != NULL; target = next_target) { 2114 2115 target->refcount++; 2116 2117 retval = tr_func(target, arg); 2118 2119 next_target = TAILQ_NEXT(target, links); 2120 2121 xpt_release_target(target); 2122 2123 if (retval == 0) 2124 return(retval); 2125 } 2126 2127 return(retval); 2128 } 2129 2130 static int 2131 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2132 xpt_devicefunc_t *tr_func, void *arg) 2133 { 2134 struct cam_ed *device, *next_device; 2135 int retval; 2136 2137 mtx_assert(target->bus->sim->mtx, MA_OWNED); 2138 retval = 1; 2139 for (device = (start_device ? start_device : 2140 TAILQ_FIRST(&target->ed_entries)); 2141 device != NULL; 2142 device = next_device) { 2143 2144 /* 2145 * Hold a reference so the current device does not go away 2146 * on us. 2147 */ 2148 device->refcount++; 2149 2150 retval = tr_func(device, arg); 2151 2152 /* 2153 * Grab our next pointer before we release the current 2154 * device. 2155 */ 2156 next_device = TAILQ_NEXT(device, links); 2157 2158 xpt_release_device(device); 2159 2160 if (retval == 0) 2161 return(retval); 2162 } 2163 2164 return(retval); 2165 } 2166 2167 static int 2168 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2169 xpt_periphfunc_t *tr_func, void *arg) 2170 { 2171 struct cam_periph *periph, *next_periph; 2172 int retval; 2173 2174 retval = 1; 2175 2176 mtx_assert(device->sim->mtx, MA_OWNED); 2177 xpt_lock_buses(); 2178 for (periph = (start_periph ? start_periph : 2179 SLIST_FIRST(&device->periphs)); 2180 periph != NULL; 2181 periph = next_periph) { 2182 2183 2184 /* 2185 * In this case, we want to show peripherals that have been 2186 * invalidated, but not peripherals that are scheduled to 2187 * be freed. So instead of calling cam_periph_acquire(), 2188 * which will fail if the periph has been invalidated, we 2189 * just check for the free flag here. If it is in the 2190 * process of being freed, we skip to the next periph. 2191 */ 2192 if (periph->flags & CAM_PERIPH_FREE) { 2193 next_periph = SLIST_NEXT(periph, periph_links); 2194 continue; 2195 } 2196 2197 /* 2198 * Acquire a reference to this periph while we call the 2199 * traversal function, so it can't go away. 2200 */ 2201 periph->refcount++; 2202 2203 retval = tr_func(periph, arg); 2204 2205 /* 2206 * Grab the next peripheral before we release this one, so 2207 * our next pointer is still valid. 2208 */ 2209 next_periph = SLIST_NEXT(periph, periph_links); 2210 2211 cam_periph_release_locked_buses(periph); 2212 2213 if (retval == 0) 2214 goto bailout_done; 2215 } 2216 2217 bailout_done: 2218 2219 xpt_unlock_buses(); 2220 2221 return(retval); 2222 } 2223 2224 static int 2225 xptpdrvtraverse(struct periph_driver **start_pdrv, 2226 xpt_pdrvfunc_t *tr_func, void *arg) 2227 { 2228 struct periph_driver **pdrv; 2229 int retval; 2230 2231 retval = 1; 2232 2233 /* 2234 * We don't traverse the peripheral driver list like we do the 2235 * other lists, because it is a linker set, and therefore cannot be 2236 * changed during runtime. If the peripheral driver list is ever 2237 * re-done to be something other than a linker set (i.e. it can 2238 * change while the system is running), the list traversal should 2239 * be modified to work like the other traversal functions. 2240 */ 2241 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2242 *pdrv != NULL; pdrv++) { 2243 retval = tr_func(pdrv, arg); 2244 2245 if (retval == 0) 2246 return(retval); 2247 } 2248 2249 return(retval); 2250 } 2251 2252 static int 2253 xptpdperiphtraverse(struct periph_driver **pdrv, 2254 struct cam_periph *start_periph, 2255 xpt_periphfunc_t *tr_func, void *arg) 2256 { 2257 struct cam_periph *periph, *next_periph; 2258 struct cam_sim *sim; 2259 int retval; 2260 2261 retval = 1; 2262 2263 xpt_lock_buses(); 2264 for (periph = (start_periph ? start_periph : 2265 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2266 periph = next_periph) { 2267 2268 2269 /* 2270 * In this case, we want to show peripherals that have been 2271 * invalidated, but not peripherals that are scheduled to 2272 * be freed. So instead of calling cam_periph_acquire(), 2273 * which will fail if the periph has been invalidated, we 2274 * just check for the free flag here. If it is free, we 2275 * skip to the next periph. 2276 */ 2277 if (periph->flags & CAM_PERIPH_FREE) { 2278 next_periph = TAILQ_NEXT(periph, unit_links); 2279 continue; 2280 } 2281 2282 /* 2283 * Acquire a reference to this periph while we call the 2284 * traversal function, so it can't go away. 2285 */ 2286 periph->refcount++; 2287 sim = periph->sim; 2288 xpt_unlock_buses(); 2289 CAM_SIM_LOCK(sim); 2290 xpt_lock_buses(); 2291 retval = tr_func(periph, arg); 2292 2293 /* 2294 * Grab the next peripheral before we release this one, so 2295 * our next pointer is still valid. 2296 */ 2297 next_periph = TAILQ_NEXT(periph, unit_links); 2298 2299 cam_periph_release_locked_buses(periph); 2300 CAM_SIM_UNLOCK(sim); 2301 2302 if (retval == 0) 2303 goto bailout_done; 2304 } 2305 bailout_done: 2306 2307 xpt_unlock_buses(); 2308 2309 return(retval); 2310 } 2311 2312 static int 2313 xptdefbusfunc(struct cam_eb *bus, void *arg) 2314 { 2315 struct xpt_traverse_config *tr_config; 2316 2317 tr_config = (struct xpt_traverse_config *)arg; 2318 2319 if (tr_config->depth == XPT_DEPTH_BUS) { 2320 xpt_busfunc_t *tr_func; 2321 2322 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2323 2324 return(tr_func(bus, tr_config->tr_arg)); 2325 } else 2326 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2327 } 2328 2329 static int 2330 xptdeftargetfunc(struct cam_et *target, void *arg) 2331 { 2332 struct xpt_traverse_config *tr_config; 2333 2334 tr_config = (struct xpt_traverse_config *)arg; 2335 2336 if (tr_config->depth == XPT_DEPTH_TARGET) { 2337 xpt_targetfunc_t *tr_func; 2338 2339 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2340 2341 return(tr_func(target, tr_config->tr_arg)); 2342 } else 2343 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2344 } 2345 2346 static int 2347 xptdefdevicefunc(struct cam_ed *device, void *arg) 2348 { 2349 struct xpt_traverse_config *tr_config; 2350 2351 tr_config = (struct xpt_traverse_config *)arg; 2352 2353 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2354 xpt_devicefunc_t *tr_func; 2355 2356 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2357 2358 return(tr_func(device, tr_config->tr_arg)); 2359 } else 2360 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2361 } 2362 2363 static int 2364 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2365 { 2366 struct xpt_traverse_config *tr_config; 2367 xpt_periphfunc_t *tr_func; 2368 2369 tr_config = (struct xpt_traverse_config *)arg; 2370 2371 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2372 2373 /* 2374 * Unlike the other default functions, we don't check for depth 2375 * here. The peripheral driver level is the last level in the EDT, 2376 * so if we're here, we should execute the function in question. 2377 */ 2378 return(tr_func(periph, tr_config->tr_arg)); 2379 } 2380 2381 /* 2382 * Execute the given function for every bus in the EDT. 2383 */ 2384 static int 2385 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2386 { 2387 struct xpt_traverse_config tr_config; 2388 2389 tr_config.depth = XPT_DEPTH_BUS; 2390 tr_config.tr_func = tr_func; 2391 tr_config.tr_arg = arg; 2392 2393 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2394 } 2395 2396 /* 2397 * Execute the given function for every device in the EDT. 2398 */ 2399 static int 2400 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2401 { 2402 struct xpt_traverse_config tr_config; 2403 2404 tr_config.depth = XPT_DEPTH_DEVICE; 2405 tr_config.tr_func = tr_func; 2406 tr_config.tr_arg = arg; 2407 2408 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2409 } 2410 2411 static int 2412 xptsetasyncfunc(struct cam_ed *device, void *arg) 2413 { 2414 struct cam_path path; 2415 struct ccb_getdev cgd; 2416 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2417 2418 /* 2419 * Don't report unconfigured devices (Wildcard devs, 2420 * devices only for target mode, device instances 2421 * that have been invalidated but are waiting for 2422 * their last reference count to be released). 2423 */ 2424 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2425 return (1); 2426 2427 xpt_compile_path(&path, 2428 NULL, 2429 device->target->bus->path_id, 2430 device->target->target_id, 2431 device->lun_id); 2432 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2433 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2434 xpt_action((union ccb *)&cgd); 2435 csa->callback(csa->callback_arg, 2436 AC_FOUND_DEVICE, 2437 &path, &cgd); 2438 xpt_release_path(&path); 2439 2440 return(1); 2441 } 2442 2443 static int 2444 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2445 { 2446 struct cam_path path; 2447 struct ccb_pathinq cpi; 2448 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2449 2450 xpt_compile_path(&path, /*periph*/NULL, 2451 bus->sim->path_id, 2452 CAM_TARGET_WILDCARD, 2453 CAM_LUN_WILDCARD); 2454 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2455 cpi.ccb_h.func_code = XPT_PATH_INQ; 2456 xpt_action((union ccb *)&cpi); 2457 csa->callback(csa->callback_arg, 2458 AC_PATH_REGISTERED, 2459 &path, &cpi); 2460 xpt_release_path(&path); 2461 2462 return(1); 2463 } 2464 2465 void 2466 xpt_action(union ccb *start_ccb) 2467 { 2468 2469 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2470 2471 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2472 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2473 } 2474 2475 void 2476 xpt_action_default(union ccb *start_ccb) 2477 { 2478 struct cam_path *path; 2479 2480 path = start_ccb->ccb_h.path; 2481 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2482 2483 switch (start_ccb->ccb_h.func_code) { 2484 case XPT_SCSI_IO: 2485 { 2486 struct cam_ed *device; 2487 2488 /* 2489 * For the sake of compatibility with SCSI-1 2490 * devices that may not understand the identify 2491 * message, we include lun information in the 2492 * second byte of all commands. SCSI-1 specifies 2493 * that luns are a 3 bit value and reserves only 3 2494 * bits for lun information in the CDB. Later 2495 * revisions of the SCSI spec allow for more than 8 2496 * luns, but have deprecated lun information in the 2497 * CDB. So, if the lun won't fit, we must omit. 2498 * 2499 * Also be aware that during initial probing for devices, 2500 * the inquiry information is unknown but initialized to 0. 2501 * This means that this code will be exercised while probing 2502 * devices with an ANSI revision greater than 2. 2503 */ 2504 device = path->device; 2505 if (device->protocol_version <= SCSI_REV_2 2506 && start_ccb->ccb_h.target_lun < 8 2507 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2508 2509 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2510 start_ccb->ccb_h.target_lun << 5; 2511 } 2512 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2513 } 2514 /* FALLTHROUGH */ 2515 case XPT_TARGET_IO: 2516 case XPT_CONT_TARGET_IO: 2517 start_ccb->csio.sense_resid = 0; 2518 start_ccb->csio.resid = 0; 2519 /* FALLTHROUGH */ 2520 case XPT_ATA_IO: 2521 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2522 start_ccb->ataio.resid = 0; 2523 /* FALLTHROUGH */ 2524 case XPT_RESET_DEV: 2525 case XPT_ENG_EXEC: 2526 case XPT_SMP_IO: 2527 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2528 if (xpt_schedule_devq(path->bus->sim->devq, path->device)) 2529 xpt_run_devq(path->bus->sim->devq); 2530 break; 2531 case XPT_CALC_GEOMETRY: 2532 { 2533 struct cam_sim *sim; 2534 2535 /* Filter out garbage */ 2536 if (start_ccb->ccg.block_size == 0 2537 || start_ccb->ccg.volume_size == 0) { 2538 start_ccb->ccg.cylinders = 0; 2539 start_ccb->ccg.heads = 0; 2540 start_ccb->ccg.secs_per_track = 0; 2541 start_ccb->ccb_h.status = CAM_REQ_CMP; 2542 break; 2543 } 2544 #if defined(PC98) || defined(__sparc64__) 2545 /* 2546 * In a PC-98 system, geometry translation depens on 2547 * the "real" device geometry obtained from mode page 4. 2548 * SCSI geometry translation is performed in the 2549 * initialization routine of the SCSI BIOS and the result 2550 * stored in host memory. If the translation is available 2551 * in host memory, use it. If not, rely on the default 2552 * translation the device driver performs. 2553 * For sparc64, we may need adjust the geometry of large 2554 * disks in order to fit the limitations of the 16-bit 2555 * fields of the VTOC8 disk label. 2556 */ 2557 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2558 start_ccb->ccb_h.status = CAM_REQ_CMP; 2559 break; 2560 } 2561 #endif 2562 sim = path->bus->sim; 2563 (*(sim->sim_action))(sim, start_ccb); 2564 break; 2565 } 2566 case XPT_ABORT: 2567 { 2568 union ccb* abort_ccb; 2569 2570 abort_ccb = start_ccb->cab.abort_ccb; 2571 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2572 2573 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2574 struct cam_ccbq *ccbq; 2575 struct cam_ed *device; 2576 2577 device = abort_ccb->ccb_h.path->device; 2578 ccbq = &device->ccbq; 2579 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2580 abort_ccb->ccb_h.status = 2581 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2582 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2583 xpt_done(abort_ccb); 2584 start_ccb->ccb_h.status = CAM_REQ_CMP; 2585 break; 2586 } 2587 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2588 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2589 /* 2590 * We've caught this ccb en route to 2591 * the SIM. Flag it for abort and the 2592 * SIM will do so just before starting 2593 * real work on the CCB. 2594 */ 2595 abort_ccb->ccb_h.status = 2596 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2597 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2598 start_ccb->ccb_h.status = CAM_REQ_CMP; 2599 break; 2600 } 2601 } 2602 if (XPT_FC_IS_QUEUED(abort_ccb) 2603 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2604 /* 2605 * It's already completed but waiting 2606 * for our SWI to get to it. 2607 */ 2608 start_ccb->ccb_h.status = CAM_UA_ABORT; 2609 break; 2610 } 2611 /* 2612 * If we weren't able to take care of the abort request 2613 * in the XPT, pass the request down to the SIM for processing. 2614 */ 2615 } 2616 /* FALLTHROUGH */ 2617 case XPT_ACCEPT_TARGET_IO: 2618 case XPT_EN_LUN: 2619 case XPT_IMMED_NOTIFY: 2620 case XPT_NOTIFY_ACK: 2621 case XPT_RESET_BUS: 2622 case XPT_IMMEDIATE_NOTIFY: 2623 case XPT_NOTIFY_ACKNOWLEDGE: 2624 case XPT_GET_SIM_KNOB: 2625 case XPT_SET_SIM_KNOB: 2626 { 2627 struct cam_sim *sim; 2628 2629 sim = path->bus->sim; 2630 (*(sim->sim_action))(sim, start_ccb); 2631 break; 2632 } 2633 case XPT_PATH_INQ: 2634 { 2635 struct cam_sim *sim; 2636 2637 sim = path->bus->sim; 2638 (*(sim->sim_action))(sim, start_ccb); 2639 break; 2640 } 2641 case XPT_PATH_STATS: 2642 start_ccb->cpis.last_reset = path->bus->last_reset; 2643 start_ccb->ccb_h.status = CAM_REQ_CMP; 2644 break; 2645 case XPT_GDEV_TYPE: 2646 { 2647 struct cam_ed *dev; 2648 2649 dev = path->device; 2650 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2651 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2652 } else { 2653 struct ccb_getdev *cgd; 2654 2655 cgd = &start_ccb->cgd; 2656 cgd->protocol = dev->protocol; 2657 cgd->inq_data = dev->inq_data; 2658 cgd->ident_data = dev->ident_data; 2659 cgd->inq_flags = dev->inq_flags; 2660 cgd->ccb_h.status = CAM_REQ_CMP; 2661 cgd->serial_num_len = dev->serial_num_len; 2662 if ((dev->serial_num_len > 0) 2663 && (dev->serial_num != NULL)) 2664 bcopy(dev->serial_num, cgd->serial_num, 2665 dev->serial_num_len); 2666 } 2667 break; 2668 } 2669 case XPT_GDEV_STATS: 2670 { 2671 struct cam_ed *dev; 2672 2673 dev = path->device; 2674 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2675 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2676 } else { 2677 struct ccb_getdevstats *cgds; 2678 struct cam_eb *bus; 2679 struct cam_et *tar; 2680 2681 cgds = &start_ccb->cgds; 2682 bus = path->bus; 2683 tar = path->target; 2684 cgds->dev_openings = dev->ccbq.dev_openings; 2685 cgds->dev_active = dev->ccbq.dev_active; 2686 cgds->devq_openings = dev->ccbq.devq_openings; 2687 cgds->devq_queued = dev->ccbq.queue.entries; 2688 cgds->held = dev->ccbq.held; 2689 cgds->last_reset = tar->last_reset; 2690 cgds->maxtags = dev->maxtags; 2691 cgds->mintags = dev->mintags; 2692 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2693 cgds->last_reset = bus->last_reset; 2694 cgds->ccb_h.status = CAM_REQ_CMP; 2695 } 2696 break; 2697 } 2698 case XPT_GDEVLIST: 2699 { 2700 struct cam_periph *nperiph; 2701 struct periph_list *periph_head; 2702 struct ccb_getdevlist *cgdl; 2703 u_int i; 2704 struct cam_ed *device; 2705 int found; 2706 2707 2708 found = 0; 2709 2710 /* 2711 * Don't want anyone mucking with our data. 2712 */ 2713 device = path->device; 2714 periph_head = &device->periphs; 2715 cgdl = &start_ccb->cgdl; 2716 2717 /* 2718 * Check and see if the list has changed since the user 2719 * last requested a list member. If so, tell them that the 2720 * list has changed, and therefore they need to start over 2721 * from the beginning. 2722 */ 2723 if ((cgdl->index != 0) && 2724 (cgdl->generation != device->generation)) { 2725 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2726 break; 2727 } 2728 2729 /* 2730 * Traverse the list of peripherals and attempt to find 2731 * the requested peripheral. 2732 */ 2733 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2734 (nperiph != NULL) && (i <= cgdl->index); 2735 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2736 if (i == cgdl->index) { 2737 strncpy(cgdl->periph_name, 2738 nperiph->periph_name, 2739 DEV_IDLEN); 2740 cgdl->unit_number = nperiph->unit_number; 2741 found = 1; 2742 } 2743 } 2744 if (found == 0) { 2745 cgdl->status = CAM_GDEVLIST_ERROR; 2746 break; 2747 } 2748 2749 if (nperiph == NULL) 2750 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2751 else 2752 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2753 2754 cgdl->index++; 2755 cgdl->generation = device->generation; 2756 2757 cgdl->ccb_h.status = CAM_REQ_CMP; 2758 break; 2759 } 2760 case XPT_DEV_MATCH: 2761 { 2762 dev_pos_type position_type; 2763 struct ccb_dev_match *cdm; 2764 2765 cdm = &start_ccb->cdm; 2766 2767 /* 2768 * There are two ways of getting at information in the EDT. 2769 * The first way is via the primary EDT tree. It starts 2770 * with a list of busses, then a list of targets on a bus, 2771 * then devices/luns on a target, and then peripherals on a 2772 * device/lun. The "other" way is by the peripheral driver 2773 * lists. The peripheral driver lists are organized by 2774 * peripheral driver. (obviously) So it makes sense to 2775 * use the peripheral driver list if the user is looking 2776 * for something like "da1", or all "da" devices. If the 2777 * user is looking for something on a particular bus/target 2778 * or lun, it's generally better to go through the EDT tree. 2779 */ 2780 2781 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2782 position_type = cdm->pos.position_type; 2783 else { 2784 u_int i; 2785 2786 position_type = CAM_DEV_POS_NONE; 2787 2788 for (i = 0; i < cdm->num_patterns; i++) { 2789 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2790 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2791 position_type = CAM_DEV_POS_EDT; 2792 break; 2793 } 2794 } 2795 2796 if (cdm->num_patterns == 0) 2797 position_type = CAM_DEV_POS_EDT; 2798 else if (position_type == CAM_DEV_POS_NONE) 2799 position_type = CAM_DEV_POS_PDRV; 2800 } 2801 2802 /* 2803 * Note that we drop the SIM lock here, because the EDT 2804 * traversal code needs to do its own locking. 2805 */ 2806 CAM_SIM_UNLOCK(xpt_path_sim(cdm->ccb_h.path)); 2807 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2808 case CAM_DEV_POS_EDT: 2809 xptedtmatch(cdm); 2810 break; 2811 case CAM_DEV_POS_PDRV: 2812 xptperiphlistmatch(cdm); 2813 break; 2814 default: 2815 cdm->status = CAM_DEV_MATCH_ERROR; 2816 break; 2817 } 2818 CAM_SIM_LOCK(xpt_path_sim(cdm->ccb_h.path)); 2819 2820 if (cdm->status == CAM_DEV_MATCH_ERROR) 2821 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2822 else 2823 start_ccb->ccb_h.status = CAM_REQ_CMP; 2824 2825 break; 2826 } 2827 case XPT_SASYNC_CB: 2828 { 2829 struct ccb_setasync *csa; 2830 struct async_node *cur_entry; 2831 struct async_list *async_head; 2832 u_int32_t added; 2833 2834 csa = &start_ccb->csa; 2835 added = csa->event_enable; 2836 async_head = &path->device->asyncs; 2837 2838 /* 2839 * If there is already an entry for us, simply 2840 * update it. 2841 */ 2842 cur_entry = SLIST_FIRST(async_head); 2843 while (cur_entry != NULL) { 2844 if ((cur_entry->callback_arg == csa->callback_arg) 2845 && (cur_entry->callback == csa->callback)) 2846 break; 2847 cur_entry = SLIST_NEXT(cur_entry, links); 2848 } 2849 2850 if (cur_entry != NULL) { 2851 /* 2852 * If the request has no flags set, 2853 * remove the entry. 2854 */ 2855 added &= ~cur_entry->event_enable; 2856 if (csa->event_enable == 0) { 2857 SLIST_REMOVE(async_head, cur_entry, 2858 async_node, links); 2859 xpt_release_device(path->device); 2860 free(cur_entry, M_CAMXPT); 2861 } else { 2862 cur_entry->event_enable = csa->event_enable; 2863 } 2864 csa->event_enable = added; 2865 } else { 2866 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2867 M_NOWAIT); 2868 if (cur_entry == NULL) { 2869 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2870 break; 2871 } 2872 cur_entry->event_enable = csa->event_enable; 2873 cur_entry->callback_arg = csa->callback_arg; 2874 cur_entry->callback = csa->callback; 2875 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2876 xpt_acquire_device(path->device); 2877 } 2878 start_ccb->ccb_h.status = CAM_REQ_CMP; 2879 break; 2880 } 2881 case XPT_REL_SIMQ: 2882 { 2883 struct ccb_relsim *crs; 2884 struct cam_ed *dev; 2885 2886 crs = &start_ccb->crs; 2887 dev = path->device; 2888 if (dev == NULL) { 2889 2890 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2891 break; 2892 } 2893 2894 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2895 2896 /* Don't ever go below one opening */ 2897 if (crs->openings > 0) { 2898 xpt_dev_ccbq_resize(path, crs->openings); 2899 if (bootverbose) { 2900 xpt_print(path, 2901 "number of openings is now %d\n", 2902 crs->openings); 2903 } 2904 } 2905 } 2906 2907 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2908 2909 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2910 2911 /* 2912 * Just extend the old timeout and decrement 2913 * the freeze count so that a single timeout 2914 * is sufficient for releasing the queue. 2915 */ 2916 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2917 callout_stop(&dev->callout); 2918 } else { 2919 2920 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2921 } 2922 2923 callout_reset(&dev->callout, 2924 (crs->release_timeout * hz) / 1000, 2925 xpt_release_devq_timeout, dev); 2926 2927 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2928 2929 } 2930 2931 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2932 2933 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2934 /* 2935 * Decrement the freeze count so that a single 2936 * completion is still sufficient to unfreeze 2937 * the queue. 2938 */ 2939 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2940 } else { 2941 2942 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2943 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2944 } 2945 } 2946 2947 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2948 2949 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2950 || (dev->ccbq.dev_active == 0)) { 2951 2952 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2953 } else { 2954 2955 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2956 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2957 } 2958 } 2959 2960 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 2961 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 2962 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 2963 start_ccb->ccb_h.status = CAM_REQ_CMP; 2964 break; 2965 } 2966 case XPT_DEBUG: { 2967 struct cam_path *oldpath; 2968 struct cam_sim *oldsim; 2969 2970 /* Check that all request bits are supported. */ 2971 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 2972 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2973 break; 2974 } 2975 2976 cam_dflags = CAM_DEBUG_NONE; 2977 if (cam_dpath != NULL) { 2978 /* To release the old path we must hold proper lock. */ 2979 oldpath = cam_dpath; 2980 cam_dpath = NULL; 2981 oldsim = xpt_path_sim(oldpath); 2982 CAM_SIM_UNLOCK(xpt_path_sim(start_ccb->ccb_h.path)); 2983 CAM_SIM_LOCK(oldsim); 2984 xpt_free_path(oldpath); 2985 CAM_SIM_UNLOCK(oldsim); 2986 CAM_SIM_LOCK(xpt_path_sim(start_ccb->ccb_h.path)); 2987 } 2988 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 2989 if (xpt_create_path(&cam_dpath, NULL, 2990 start_ccb->ccb_h.path_id, 2991 start_ccb->ccb_h.target_id, 2992 start_ccb->ccb_h.target_lun) != 2993 CAM_REQ_CMP) { 2994 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2995 } else { 2996 cam_dflags = start_ccb->cdbg.flags; 2997 start_ccb->ccb_h.status = CAM_REQ_CMP; 2998 xpt_print(cam_dpath, "debugging flags now %x\n", 2999 cam_dflags); 3000 } 3001 } else 3002 start_ccb->ccb_h.status = CAM_REQ_CMP; 3003 break; 3004 } 3005 case XPT_NOOP: 3006 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3007 xpt_freeze_devq(path, 1); 3008 start_ccb->ccb_h.status = CAM_REQ_CMP; 3009 break; 3010 default: 3011 case XPT_SDEV_TYPE: 3012 case XPT_TERM_IO: 3013 case XPT_ENG_INQ: 3014 /* XXX Implement */ 3015 printf("%s: CCB type %#x not supported\n", __func__, 3016 start_ccb->ccb_h.func_code); 3017 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3018 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3019 xpt_done(start_ccb); 3020 } 3021 break; 3022 } 3023 } 3024 3025 void 3026 xpt_polled_action(union ccb *start_ccb) 3027 { 3028 u_int32_t timeout; 3029 struct cam_sim *sim; 3030 struct cam_devq *devq; 3031 struct cam_ed *dev; 3032 3033 3034 timeout = start_ccb->ccb_h.timeout * 10; 3035 sim = start_ccb->ccb_h.path->bus->sim; 3036 devq = sim->devq; 3037 dev = start_ccb->ccb_h.path->device; 3038 3039 mtx_assert(sim->mtx, MA_OWNED); 3040 3041 /* Don't use ISR for this SIM while polling. */ 3042 sim->flags |= CAM_SIM_POLLED; 3043 3044 /* 3045 * Steal an opening so that no other queued requests 3046 * can get it before us while we simulate interrupts. 3047 */ 3048 dev->ccbq.devq_openings--; 3049 dev->ccbq.dev_openings--; 3050 3051 while(((devq != NULL && devq->send_openings <= 0) || 3052 dev->ccbq.dev_openings < 0) && (--timeout > 0)) { 3053 DELAY(100); 3054 (*(sim->sim_poll))(sim); 3055 camisr_runqueue(&sim->sim_doneq); 3056 } 3057 3058 dev->ccbq.devq_openings++; 3059 dev->ccbq.dev_openings++; 3060 3061 if (timeout != 0) { 3062 xpt_action(start_ccb); 3063 while(--timeout > 0) { 3064 (*(sim->sim_poll))(sim); 3065 camisr_runqueue(&sim->sim_doneq); 3066 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3067 != CAM_REQ_INPROG) 3068 break; 3069 DELAY(100); 3070 } 3071 if (timeout == 0) { 3072 /* 3073 * XXX Is it worth adding a sim_timeout entry 3074 * point so we can attempt recovery? If 3075 * this is only used for dumps, I don't think 3076 * it is. 3077 */ 3078 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3079 } 3080 } else { 3081 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3082 } 3083 3084 /* We will use CAM ISR for this SIM again. */ 3085 sim->flags &= ~CAM_SIM_POLLED; 3086 } 3087 3088 /* 3089 * Schedule a peripheral driver to receive a ccb when it's 3090 * target device has space for more transactions. 3091 */ 3092 void 3093 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3094 { 3095 struct cam_ed *device; 3096 int runq = 0; 3097 3098 mtx_assert(perph->sim->mtx, MA_OWNED); 3099 3100 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3101 device = perph->path->device; 3102 if (periph_is_queued(perph)) { 3103 /* Simply reorder based on new priority */ 3104 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3105 (" change priority to %d\n", new_priority)); 3106 if (new_priority < perph->pinfo.priority) { 3107 camq_change_priority(&device->drvq, 3108 perph->pinfo.index, 3109 new_priority); 3110 runq = 1; 3111 } 3112 } else { 3113 /* New entry on the queue */ 3114 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3115 (" added periph to queue\n")); 3116 perph->pinfo.priority = new_priority; 3117 perph->pinfo.generation = ++device->drvq.generation; 3118 camq_insert(&device->drvq, &perph->pinfo); 3119 runq = 1; 3120 } 3121 if (runq != 0) { 3122 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3123 (" calling xpt_run_dev_allocq\n")); 3124 xpt_run_dev_allocq(device); 3125 } 3126 } 3127 3128 3129 /* 3130 * Schedule a device to run on a given queue. 3131 * If the device was inserted as a new entry on the queue, 3132 * return 1 meaning the device queue should be run. If we 3133 * were already queued, implying someone else has already 3134 * started the queue, return 0 so the caller doesn't attempt 3135 * to run the queue. 3136 */ 3137 int 3138 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3139 u_int32_t new_priority) 3140 { 3141 int retval; 3142 u_int32_t old_priority; 3143 3144 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3145 3146 old_priority = pinfo->priority; 3147 3148 /* 3149 * Are we already queued? 3150 */ 3151 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3152 /* Simply reorder based on new priority */ 3153 if (new_priority < old_priority) { 3154 camq_change_priority(queue, pinfo->index, 3155 new_priority); 3156 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3157 ("changed priority to %d\n", 3158 new_priority)); 3159 retval = 1; 3160 } else 3161 retval = 0; 3162 } else { 3163 /* New entry on the queue */ 3164 if (new_priority < old_priority) 3165 pinfo->priority = new_priority; 3166 3167 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3168 ("Inserting onto queue\n")); 3169 pinfo->generation = ++queue->generation; 3170 camq_insert(queue, pinfo); 3171 retval = 1; 3172 } 3173 return (retval); 3174 } 3175 3176 static void 3177 xpt_run_dev_allocq(struct cam_ed *device) 3178 { 3179 struct camq *drvq; 3180 3181 if (device->ccbq.devq_allocating) 3182 return; 3183 device->ccbq.devq_allocating = 1; 3184 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq(%p)\n", device)); 3185 drvq = &device->drvq; 3186 while ((drvq->entries > 0) && 3187 (device->ccbq.devq_openings > 0 || 3188 CAMQ_GET_PRIO(drvq) <= CAM_PRIORITY_OOB) && 3189 (device->ccbq.queue.qfrozen_cnt == 0)) { 3190 union ccb *work_ccb; 3191 struct cam_periph *drv; 3192 3193 KASSERT(drvq->entries > 0, ("xpt_run_dev_allocq: " 3194 "Device on queue without any work to do")); 3195 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3196 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3197 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3198 drv->pinfo.priority); 3199 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3200 ("calling periph start\n")); 3201 drv->periph_start(drv, work_ccb); 3202 } else { 3203 /* 3204 * Malloc failure in alloc_ccb 3205 */ 3206 /* 3207 * XXX add us to a list to be run from free_ccb 3208 * if we don't have any ccbs active on this 3209 * device queue otherwise we may never get run 3210 * again. 3211 */ 3212 break; 3213 } 3214 } 3215 device->ccbq.devq_allocating = 0; 3216 } 3217 3218 static void 3219 xpt_run_devq(struct cam_devq *devq) 3220 { 3221 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 3222 3223 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3224 3225 devq->send_queue.qfrozen_cnt++; 3226 while ((devq->send_queue.entries > 0) 3227 && (devq->send_openings > 0) 3228 && (devq->send_queue.qfrozen_cnt <= 1)) { 3229 struct cam_ed_qinfo *qinfo; 3230 struct cam_ed *device; 3231 union ccb *work_ccb; 3232 struct cam_sim *sim; 3233 3234 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3235 CAMQ_HEAD); 3236 device = qinfo->device; 3237 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3238 ("running device %p\n", device)); 3239 3240 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3241 if (work_ccb == NULL) { 3242 printf("device on run queue with no ccbs???\n"); 3243 continue; 3244 } 3245 3246 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3247 3248 mtx_lock(&xsoftc.xpt_lock); 3249 if (xsoftc.num_highpower <= 0) { 3250 /* 3251 * We got a high power command, but we 3252 * don't have any available slots. Freeze 3253 * the device queue until we have a slot 3254 * available. 3255 */ 3256 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3257 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3258 &work_ccb->ccb_h, 3259 xpt_links.stqe); 3260 3261 mtx_unlock(&xsoftc.xpt_lock); 3262 continue; 3263 } else { 3264 /* 3265 * Consume a high power slot while 3266 * this ccb runs. 3267 */ 3268 xsoftc.num_highpower--; 3269 } 3270 mtx_unlock(&xsoftc.xpt_lock); 3271 } 3272 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3273 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3274 3275 devq->send_openings--; 3276 devq->send_active++; 3277 3278 xpt_schedule_devq(devq, device); 3279 3280 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3281 /* 3282 * The client wants to freeze the queue 3283 * after this CCB is sent. 3284 */ 3285 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3286 } 3287 3288 /* In Target mode, the peripheral driver knows best... */ 3289 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3290 if ((device->inq_flags & SID_CmdQue) != 0 3291 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3292 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3293 else 3294 /* 3295 * Clear this in case of a retried CCB that 3296 * failed due to a rejected tag. 3297 */ 3298 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3299 } 3300 3301 switch (work_ccb->ccb_h.func_code) { 3302 case XPT_SCSI_IO: 3303 CAM_DEBUG(work_ccb->ccb_h.path, 3304 CAM_DEBUG_CDB,("%s. CDB: %s\n", 3305 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0], 3306 &device->inq_data), 3307 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes, 3308 cdb_str, sizeof(cdb_str)))); 3309 break; 3310 case XPT_ATA_IO: 3311 CAM_DEBUG(work_ccb->ccb_h.path, 3312 CAM_DEBUG_CDB,("%s. ACB: %s\n", 3313 ata_op_string(&work_ccb->ataio.cmd), 3314 ata_cmd_string(&work_ccb->ataio.cmd, 3315 cdb_str, sizeof(cdb_str)))); 3316 break; 3317 default: 3318 break; 3319 } 3320 3321 /* 3322 * Device queues can be shared among multiple sim instances 3323 * that reside on different busses. Use the SIM in the queue 3324 * CCB's path, rather than the one in the bus that was passed 3325 * into this function. 3326 */ 3327 sim = work_ccb->ccb_h.path->bus->sim; 3328 (*(sim->sim_action))(sim, work_ccb); 3329 } 3330 devq->send_queue.qfrozen_cnt--; 3331 } 3332 3333 /* 3334 * This function merges stuff from the slave ccb into the master ccb, while 3335 * keeping important fields in the master ccb constant. 3336 */ 3337 void 3338 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3339 { 3340 3341 /* 3342 * Pull fields that are valid for peripheral drivers to set 3343 * into the master CCB along with the CCB "payload". 3344 */ 3345 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3346 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3347 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3348 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3349 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3350 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3351 } 3352 3353 void 3354 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3355 { 3356 3357 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3358 ccb_h->pinfo.priority = priority; 3359 ccb_h->path = path; 3360 ccb_h->path_id = path->bus->path_id; 3361 if (path->target) 3362 ccb_h->target_id = path->target->target_id; 3363 else 3364 ccb_h->target_id = CAM_TARGET_WILDCARD; 3365 if (path->device) { 3366 ccb_h->target_lun = path->device->lun_id; 3367 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3368 } else { 3369 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3370 } 3371 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3372 ccb_h->flags = 0; 3373 } 3374 3375 /* Path manipulation functions */ 3376 cam_status 3377 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3378 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3379 { 3380 struct cam_path *path; 3381 cam_status status; 3382 3383 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3384 3385 if (path == NULL) { 3386 status = CAM_RESRC_UNAVAIL; 3387 return(status); 3388 } 3389 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3390 if (status != CAM_REQ_CMP) { 3391 free(path, M_CAMPATH); 3392 path = NULL; 3393 } 3394 *new_path_ptr = path; 3395 return (status); 3396 } 3397 3398 cam_status 3399 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3400 struct cam_periph *periph, path_id_t path_id, 3401 target_id_t target_id, lun_id_t lun_id) 3402 { 3403 struct cam_path *path; 3404 struct cam_eb *bus = NULL; 3405 cam_status status; 3406 3407 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_WAITOK); 3408 3409 bus = xpt_find_bus(path_id); 3410 if (bus != NULL) 3411 CAM_SIM_LOCK(bus->sim); 3412 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3413 if (bus != NULL) { 3414 CAM_SIM_UNLOCK(bus->sim); 3415 xpt_release_bus(bus); 3416 } 3417 if (status != CAM_REQ_CMP) { 3418 free(path, M_CAMPATH); 3419 path = NULL; 3420 } 3421 *new_path_ptr = path; 3422 return (status); 3423 } 3424 3425 cam_status 3426 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3427 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3428 { 3429 struct cam_eb *bus; 3430 struct cam_et *target; 3431 struct cam_ed *device; 3432 cam_status status; 3433 3434 status = CAM_REQ_CMP; /* Completed without error */ 3435 target = NULL; /* Wildcarded */ 3436 device = NULL; /* Wildcarded */ 3437 3438 /* 3439 * We will potentially modify the EDT, so block interrupts 3440 * that may attempt to create cam paths. 3441 */ 3442 bus = xpt_find_bus(path_id); 3443 if (bus == NULL) { 3444 status = CAM_PATH_INVALID; 3445 } else { 3446 target = xpt_find_target(bus, target_id); 3447 if (target == NULL) { 3448 /* Create one */ 3449 struct cam_et *new_target; 3450 3451 new_target = xpt_alloc_target(bus, target_id); 3452 if (new_target == NULL) { 3453 status = CAM_RESRC_UNAVAIL; 3454 } else { 3455 target = new_target; 3456 } 3457 } 3458 if (target != NULL) { 3459 device = xpt_find_device(target, lun_id); 3460 if (device == NULL) { 3461 /* Create one */ 3462 struct cam_ed *new_device; 3463 3464 new_device = 3465 (*(bus->xport->alloc_device))(bus, 3466 target, 3467 lun_id); 3468 if (new_device == NULL) { 3469 status = CAM_RESRC_UNAVAIL; 3470 } else { 3471 device = new_device; 3472 } 3473 } 3474 } 3475 } 3476 3477 /* 3478 * Only touch the user's data if we are successful. 3479 */ 3480 if (status == CAM_REQ_CMP) { 3481 new_path->periph = perph; 3482 new_path->bus = bus; 3483 new_path->target = target; 3484 new_path->device = device; 3485 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3486 } else { 3487 if (device != NULL) 3488 xpt_release_device(device); 3489 if (target != NULL) 3490 xpt_release_target(target); 3491 if (bus != NULL) 3492 xpt_release_bus(bus); 3493 } 3494 return (status); 3495 } 3496 3497 void 3498 xpt_release_path(struct cam_path *path) 3499 { 3500 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3501 if (path->device != NULL) { 3502 xpt_release_device(path->device); 3503 path->device = NULL; 3504 } 3505 if (path->target != NULL) { 3506 xpt_release_target(path->target); 3507 path->target = NULL; 3508 } 3509 if (path->bus != NULL) { 3510 xpt_release_bus(path->bus); 3511 path->bus = NULL; 3512 } 3513 } 3514 3515 void 3516 xpt_free_path(struct cam_path *path) 3517 { 3518 3519 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3520 xpt_release_path(path); 3521 free(path, M_CAMPATH); 3522 } 3523 3524 void 3525 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3526 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3527 { 3528 3529 xpt_lock_buses(); 3530 if (bus_ref) { 3531 if (path->bus) 3532 *bus_ref = path->bus->refcount; 3533 else 3534 *bus_ref = 0; 3535 } 3536 if (periph_ref) { 3537 if (path->periph) 3538 *periph_ref = path->periph->refcount; 3539 else 3540 *periph_ref = 0; 3541 } 3542 xpt_unlock_buses(); 3543 if (target_ref) { 3544 if (path->target) 3545 *target_ref = path->target->refcount; 3546 else 3547 *target_ref = 0; 3548 } 3549 if (device_ref) { 3550 if (path->device) 3551 *device_ref = path->device->refcount; 3552 else 3553 *device_ref = 0; 3554 } 3555 } 3556 3557 /* 3558 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3559 * in path1, 2 for match with wildcards in path2. 3560 */ 3561 int 3562 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3563 { 3564 int retval = 0; 3565 3566 if (path1->bus != path2->bus) { 3567 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3568 retval = 1; 3569 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3570 retval = 2; 3571 else 3572 return (-1); 3573 } 3574 if (path1->target != path2->target) { 3575 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3576 if (retval == 0) 3577 retval = 1; 3578 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3579 retval = 2; 3580 else 3581 return (-1); 3582 } 3583 if (path1->device != path2->device) { 3584 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3585 if (retval == 0) 3586 retval = 1; 3587 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3588 retval = 2; 3589 else 3590 return (-1); 3591 } 3592 return (retval); 3593 } 3594 3595 void 3596 xpt_print_path(struct cam_path *path) 3597 { 3598 3599 if (path == NULL) 3600 printf("(nopath): "); 3601 else { 3602 if (path->periph != NULL) 3603 printf("(%s%d:", path->periph->periph_name, 3604 path->periph->unit_number); 3605 else 3606 printf("(noperiph:"); 3607 3608 if (path->bus != NULL) 3609 printf("%s%d:%d:", path->bus->sim->sim_name, 3610 path->bus->sim->unit_number, 3611 path->bus->sim->bus_id); 3612 else 3613 printf("nobus:"); 3614 3615 if (path->target != NULL) 3616 printf("%d:", path->target->target_id); 3617 else 3618 printf("X:"); 3619 3620 if (path->device != NULL) 3621 printf("%d): ", path->device->lun_id); 3622 else 3623 printf("X): "); 3624 } 3625 } 3626 3627 void 3628 xpt_print(struct cam_path *path, const char *fmt, ...) 3629 { 3630 va_list ap; 3631 xpt_print_path(path); 3632 va_start(ap, fmt); 3633 vprintf(fmt, ap); 3634 va_end(ap); 3635 } 3636 3637 int 3638 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3639 { 3640 struct sbuf sb; 3641 3642 #ifdef INVARIANTS 3643 if (path != NULL && path->bus != NULL) 3644 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3645 #endif 3646 3647 sbuf_new(&sb, str, str_len, 0); 3648 3649 if (path == NULL) 3650 sbuf_printf(&sb, "(nopath): "); 3651 else { 3652 if (path->periph != NULL) 3653 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3654 path->periph->unit_number); 3655 else 3656 sbuf_printf(&sb, "(noperiph:"); 3657 3658 if (path->bus != NULL) 3659 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3660 path->bus->sim->unit_number, 3661 path->bus->sim->bus_id); 3662 else 3663 sbuf_printf(&sb, "nobus:"); 3664 3665 if (path->target != NULL) 3666 sbuf_printf(&sb, "%d:", path->target->target_id); 3667 else 3668 sbuf_printf(&sb, "X:"); 3669 3670 if (path->device != NULL) 3671 sbuf_printf(&sb, "%d): ", path->device->lun_id); 3672 else 3673 sbuf_printf(&sb, "X): "); 3674 } 3675 sbuf_finish(&sb); 3676 3677 return(sbuf_len(&sb)); 3678 } 3679 3680 path_id_t 3681 xpt_path_path_id(struct cam_path *path) 3682 { 3683 return(path->bus->path_id); 3684 } 3685 3686 target_id_t 3687 xpt_path_target_id(struct cam_path *path) 3688 { 3689 if (path->target != NULL) 3690 return (path->target->target_id); 3691 else 3692 return (CAM_TARGET_WILDCARD); 3693 } 3694 3695 lun_id_t 3696 xpt_path_lun_id(struct cam_path *path) 3697 { 3698 if (path->device != NULL) 3699 return (path->device->lun_id); 3700 else 3701 return (CAM_LUN_WILDCARD); 3702 } 3703 3704 struct cam_sim * 3705 xpt_path_sim(struct cam_path *path) 3706 { 3707 3708 return (path->bus->sim); 3709 } 3710 3711 struct cam_periph* 3712 xpt_path_periph(struct cam_path *path) 3713 { 3714 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3715 3716 return (path->periph); 3717 } 3718 3719 int 3720 xpt_path_legacy_ata_id(struct cam_path *path) 3721 { 3722 struct cam_eb *bus; 3723 int bus_id; 3724 3725 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) && 3726 strcmp(path->bus->sim->sim_name, "ahcich") != 0 && 3727 strcmp(path->bus->sim->sim_name, "mvsch") != 0 && 3728 strcmp(path->bus->sim->sim_name, "siisch") != 0) 3729 return (-1); 3730 3731 if (strcmp(path->bus->sim->sim_name, "ata") == 0 && 3732 path->bus->sim->unit_number < 2) { 3733 bus_id = path->bus->sim->unit_number; 3734 } else { 3735 bus_id = 2; 3736 xpt_lock_buses(); 3737 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 3738 if (bus == path->bus) 3739 break; 3740 if ((strcmp(bus->sim->sim_name, "ata") == 0 && 3741 bus->sim->unit_number >= 2) || 3742 strcmp(bus->sim->sim_name, "ahcich") == 0 || 3743 strcmp(bus->sim->sim_name, "mvsch") == 0 || 3744 strcmp(bus->sim->sim_name, "siisch") == 0) 3745 bus_id++; 3746 } 3747 xpt_unlock_buses(); 3748 } 3749 if (path->target != NULL) { 3750 if (path->target->target_id < 2) 3751 return (bus_id * 2 + path->target->target_id); 3752 else 3753 return (-1); 3754 } else 3755 return (bus_id * 2); 3756 } 3757 3758 /* 3759 * Release a CAM control block for the caller. Remit the cost of the structure 3760 * to the device referenced by the path. If the this device had no 'credits' 3761 * and peripheral drivers have registered async callbacks for this notification 3762 * call them now. 3763 */ 3764 void 3765 xpt_release_ccb(union ccb *free_ccb) 3766 { 3767 struct cam_path *path; 3768 struct cam_ed *device; 3769 struct cam_eb *bus; 3770 struct cam_sim *sim; 3771 3772 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3773 path = free_ccb->ccb_h.path; 3774 device = path->device; 3775 bus = path->bus; 3776 sim = bus->sim; 3777 3778 mtx_assert(sim->mtx, MA_OWNED); 3779 3780 cam_ccbq_release_opening(&device->ccbq); 3781 if (device->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) { 3782 device->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 3783 cam_ccbq_resize(&device->ccbq, 3784 device->ccbq.dev_openings + device->ccbq.dev_active); 3785 } 3786 if (sim->ccb_count > sim->max_ccbs) { 3787 xpt_free_ccb(free_ccb); 3788 sim->ccb_count--; 3789 } else { 3790 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 3791 xpt_links.sle); 3792 } 3793 xpt_run_dev_allocq(device); 3794 } 3795 3796 /* Functions accessed by SIM drivers */ 3797 3798 static struct xpt_xport xport_default = { 3799 .alloc_device = xpt_alloc_device_default, 3800 .action = xpt_action_default, 3801 .async = xpt_dev_async_default, 3802 }; 3803 3804 /* 3805 * A sim structure, listing the SIM entry points and instance 3806 * identification info is passed to xpt_bus_register to hook the SIM 3807 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3808 * for this new bus and places it in the array of busses and assigns 3809 * it a path_id. The path_id may be influenced by "hard wiring" 3810 * information specified by the user. Once interrupt services are 3811 * available, the bus will be probed. 3812 */ 3813 int32_t 3814 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3815 { 3816 struct cam_eb *new_bus; 3817 struct cam_eb *old_bus; 3818 struct ccb_pathinq cpi; 3819 struct cam_path *path; 3820 cam_status status; 3821 3822 mtx_assert(sim->mtx, MA_OWNED); 3823 3824 sim->bus_id = bus; 3825 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3826 M_CAMXPT, M_NOWAIT); 3827 if (new_bus == NULL) { 3828 /* Couldn't satisfy request */ 3829 return (CAM_RESRC_UNAVAIL); 3830 } 3831 if (strcmp(sim->sim_name, "xpt") != 0) { 3832 sim->path_id = 3833 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3834 } 3835 3836 TAILQ_INIT(&new_bus->et_entries); 3837 new_bus->path_id = sim->path_id; 3838 cam_sim_hold(sim); 3839 new_bus->sim = sim; 3840 timevalclear(&new_bus->last_reset); 3841 new_bus->flags = 0; 3842 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3843 new_bus->generation = 0; 3844 3845 xpt_lock_buses(); 3846 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3847 while (old_bus != NULL 3848 && old_bus->path_id < new_bus->path_id) 3849 old_bus = TAILQ_NEXT(old_bus, links); 3850 if (old_bus != NULL) 3851 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3852 else 3853 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3854 xsoftc.bus_generation++; 3855 xpt_unlock_buses(); 3856 3857 /* 3858 * Set a default transport so that a PATH_INQ can be issued to 3859 * the SIM. This will then allow for probing and attaching of 3860 * a more appropriate transport. 3861 */ 3862 new_bus->xport = &xport_default; 3863 3864 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 3865 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3866 if (status != CAM_REQ_CMP) { 3867 xpt_release_bus(new_bus); 3868 free(path, M_CAMXPT); 3869 return (CAM_RESRC_UNAVAIL); 3870 } 3871 3872 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3873 cpi.ccb_h.func_code = XPT_PATH_INQ; 3874 xpt_action((union ccb *)&cpi); 3875 3876 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3877 switch (cpi.transport) { 3878 case XPORT_SPI: 3879 case XPORT_SAS: 3880 case XPORT_FC: 3881 case XPORT_USB: 3882 case XPORT_ISCSI: 3883 case XPORT_PPB: 3884 new_bus->xport = scsi_get_xport(); 3885 break; 3886 case XPORT_ATA: 3887 case XPORT_SATA: 3888 new_bus->xport = ata_get_xport(); 3889 break; 3890 default: 3891 new_bus->xport = &xport_default; 3892 break; 3893 } 3894 } 3895 3896 /* Notify interested parties */ 3897 if (sim->path_id != CAM_XPT_PATH_ID) { 3898 union ccb *scan_ccb; 3899 3900 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3901 /* Initiate bus rescan. */ 3902 scan_ccb = xpt_alloc_ccb_nowait(); 3903 scan_ccb->ccb_h.path = path; 3904 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3905 scan_ccb->crcn.flags = 0; 3906 xpt_rescan(scan_ccb); 3907 } else 3908 xpt_free_path(path); 3909 return (CAM_SUCCESS); 3910 } 3911 3912 int32_t 3913 xpt_bus_deregister(path_id_t pathid) 3914 { 3915 struct cam_path bus_path; 3916 cam_status status; 3917 3918 status = xpt_compile_path(&bus_path, NULL, pathid, 3919 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3920 if (status != CAM_REQ_CMP) 3921 return (status); 3922 3923 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3924 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3925 3926 /* Release the reference count held while registered. */ 3927 xpt_release_bus(bus_path.bus); 3928 xpt_release_path(&bus_path); 3929 3930 return (CAM_REQ_CMP); 3931 } 3932 3933 static path_id_t 3934 xptnextfreepathid(void) 3935 { 3936 struct cam_eb *bus; 3937 path_id_t pathid; 3938 const char *strval; 3939 3940 pathid = 0; 3941 xpt_lock_buses(); 3942 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3943 retry: 3944 /* Find an unoccupied pathid */ 3945 while (bus != NULL && bus->path_id <= pathid) { 3946 if (bus->path_id == pathid) 3947 pathid++; 3948 bus = TAILQ_NEXT(bus, links); 3949 } 3950 xpt_unlock_buses(); 3951 3952 /* 3953 * Ensure that this pathid is not reserved for 3954 * a bus that may be registered in the future. 3955 */ 3956 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3957 ++pathid; 3958 /* Start the search over */ 3959 xpt_lock_buses(); 3960 goto retry; 3961 } 3962 return (pathid); 3963 } 3964 3965 static path_id_t 3966 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3967 { 3968 path_id_t pathid; 3969 int i, dunit, val; 3970 char buf[32]; 3971 const char *dname; 3972 3973 pathid = CAM_XPT_PATH_ID; 3974 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3975 i = 0; 3976 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 3977 if (strcmp(dname, "scbus")) { 3978 /* Avoid a bit of foot shooting. */ 3979 continue; 3980 } 3981 if (dunit < 0) /* unwired?! */ 3982 continue; 3983 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 3984 if (sim_bus == val) { 3985 pathid = dunit; 3986 break; 3987 } 3988 } else if (sim_bus == 0) { 3989 /* Unspecified matches bus 0 */ 3990 pathid = dunit; 3991 break; 3992 } else { 3993 printf("Ambiguous scbus configuration for %s%d " 3994 "bus %d, cannot wire down. The kernel " 3995 "config entry for scbus%d should " 3996 "specify a controller bus.\n" 3997 "Scbus will be assigned dynamically.\n", 3998 sim_name, sim_unit, sim_bus, dunit); 3999 break; 4000 } 4001 } 4002 4003 if (pathid == CAM_XPT_PATH_ID) 4004 pathid = xptnextfreepathid(); 4005 return (pathid); 4006 } 4007 4008 static const char * 4009 xpt_async_string(u_int32_t async_code) 4010 { 4011 4012 switch (async_code) { 4013 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4014 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4015 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4016 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4017 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4018 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4019 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4020 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4021 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4022 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4023 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4024 case AC_CONTRACT: return ("AC_CONTRACT"); 4025 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4026 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4027 } 4028 return ("AC_UNKNOWN"); 4029 } 4030 4031 void 4032 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4033 { 4034 struct cam_eb *bus; 4035 struct cam_et *target, *next_target; 4036 struct cam_ed *device, *next_device; 4037 4038 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4039 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4040 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4041 4042 /* 4043 * Most async events come from a CAM interrupt context. In 4044 * a few cases, the error recovery code at the peripheral layer, 4045 * which may run from our SWI or a process context, may signal 4046 * deferred events with a call to xpt_async. 4047 */ 4048 4049 bus = path->bus; 4050 4051 if (async_code == AC_BUS_RESET) { 4052 /* Update our notion of when the last reset occurred */ 4053 microtime(&bus->last_reset); 4054 } 4055 4056 for (target = TAILQ_FIRST(&bus->et_entries); 4057 target != NULL; 4058 target = next_target) { 4059 4060 next_target = TAILQ_NEXT(target, links); 4061 4062 if (path->target != target 4063 && path->target->target_id != CAM_TARGET_WILDCARD 4064 && target->target_id != CAM_TARGET_WILDCARD) 4065 continue; 4066 4067 if (async_code == AC_SENT_BDR) { 4068 /* Update our notion of when the last reset occurred */ 4069 microtime(&path->target->last_reset); 4070 } 4071 4072 for (device = TAILQ_FIRST(&target->ed_entries); 4073 device != NULL; 4074 device = next_device) { 4075 4076 next_device = TAILQ_NEXT(device, links); 4077 4078 if (path->device != device 4079 && path->device->lun_id != CAM_LUN_WILDCARD 4080 && device->lun_id != CAM_LUN_WILDCARD) 4081 continue; 4082 /* 4083 * The async callback could free the device. 4084 * If it is a broadcast async, it doesn't hold 4085 * device reference, so take our own reference. 4086 */ 4087 xpt_acquire_device(device); 4088 (*(bus->xport->async))(async_code, bus, 4089 target, device, 4090 async_arg); 4091 4092 xpt_async_bcast(&device->asyncs, async_code, 4093 path, async_arg); 4094 xpt_release_device(device); 4095 } 4096 } 4097 4098 /* 4099 * If this wasn't a fully wildcarded async, tell all 4100 * clients that want all async events. 4101 */ 4102 if (bus != xpt_periph->path->bus) 4103 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4104 path, async_arg); 4105 } 4106 4107 static void 4108 xpt_async_bcast(struct async_list *async_head, 4109 u_int32_t async_code, 4110 struct cam_path *path, void *async_arg) 4111 { 4112 struct async_node *cur_entry; 4113 4114 cur_entry = SLIST_FIRST(async_head); 4115 while (cur_entry != NULL) { 4116 struct async_node *next_entry; 4117 /* 4118 * Grab the next list entry before we call the current 4119 * entry's callback. This is because the callback function 4120 * can delete its async callback entry. 4121 */ 4122 next_entry = SLIST_NEXT(cur_entry, links); 4123 if ((cur_entry->event_enable & async_code) != 0) 4124 cur_entry->callback(cur_entry->callback_arg, 4125 async_code, path, 4126 async_arg); 4127 cur_entry = next_entry; 4128 } 4129 } 4130 4131 static void 4132 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4133 struct cam_et *target, struct cam_ed *device, 4134 void *async_arg) 4135 { 4136 printf("%s called\n", __func__); 4137 } 4138 4139 u_int32_t 4140 xpt_freeze_devq(struct cam_path *path, u_int count) 4141 { 4142 struct cam_ed *dev = path->device; 4143 4144 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4145 dev->ccbq.queue.qfrozen_cnt += count; 4146 /* Remove frozen device from sendq. */ 4147 if (device_is_queued(dev)) { 4148 camq_remove(&dev->sim->devq->send_queue, 4149 dev->devq_entry.pinfo.index); 4150 } 4151 return (dev->ccbq.queue.qfrozen_cnt); 4152 } 4153 4154 u_int32_t 4155 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4156 { 4157 4158 mtx_assert(sim->mtx, MA_OWNED); 4159 sim->devq->send_queue.qfrozen_cnt += count; 4160 return (sim->devq->send_queue.qfrozen_cnt); 4161 } 4162 4163 static void 4164 xpt_release_devq_timeout(void *arg) 4165 { 4166 struct cam_ed *device; 4167 4168 device = (struct cam_ed *)arg; 4169 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4170 } 4171 4172 void 4173 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4174 { 4175 4176 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4177 xpt_release_devq_device(path->device, count, run_queue); 4178 } 4179 4180 void 4181 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4182 { 4183 4184 if (count > dev->ccbq.queue.qfrozen_cnt) { 4185 #ifdef INVARIANTS 4186 printf("xpt_release_devq(): requested %u > present %u\n", 4187 count, dev->ccbq.queue.qfrozen_cnt); 4188 #endif 4189 count = dev->ccbq.queue.qfrozen_cnt; 4190 } 4191 dev->ccbq.queue.qfrozen_cnt -= count; 4192 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4193 /* 4194 * No longer need to wait for a successful 4195 * command completion. 4196 */ 4197 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4198 /* 4199 * Remove any timeouts that might be scheduled 4200 * to release this queue. 4201 */ 4202 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4203 callout_stop(&dev->callout); 4204 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4205 } 4206 xpt_run_dev_allocq(dev); 4207 if (run_queue == 0) 4208 return; 4209 /* 4210 * Now that we are unfrozen schedule the 4211 * device so any pending transactions are 4212 * run. 4213 */ 4214 if (xpt_schedule_devq(dev->sim->devq, dev)) 4215 xpt_run_devq(dev->sim->devq); 4216 } 4217 } 4218 4219 void 4220 xpt_release_simq(struct cam_sim *sim, int run_queue) 4221 { 4222 struct camq *sendq; 4223 4224 mtx_assert(sim->mtx, MA_OWNED); 4225 sendq = &(sim->devq->send_queue); 4226 if (sendq->qfrozen_cnt <= 0) { 4227 #ifdef INVARIANTS 4228 printf("xpt_release_simq: requested 1 > present %u\n", 4229 sendq->qfrozen_cnt); 4230 #endif 4231 } else 4232 sendq->qfrozen_cnt--; 4233 if (sendq->qfrozen_cnt == 0) { 4234 /* 4235 * If there is a timeout scheduled to release this 4236 * sim queue, remove it. The queue frozen count is 4237 * already at 0. 4238 */ 4239 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4240 callout_stop(&sim->callout); 4241 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4242 } 4243 if (run_queue) { 4244 /* 4245 * Now that we are unfrozen run the send queue. 4246 */ 4247 xpt_run_devq(sim->devq); 4248 } 4249 } 4250 } 4251 4252 /* 4253 * XXX Appears to be unused. 4254 */ 4255 static void 4256 xpt_release_simq_timeout(void *arg) 4257 { 4258 struct cam_sim *sim; 4259 4260 sim = (struct cam_sim *)arg; 4261 xpt_release_simq(sim, /* run_queue */ TRUE); 4262 } 4263 4264 void 4265 xpt_done(union ccb *done_ccb) 4266 { 4267 struct cam_sim *sim; 4268 int first; 4269 4270 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4271 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4272 /* 4273 * Queue up the request for handling by our SWI handler 4274 * any of the "non-immediate" type of ccbs. 4275 */ 4276 sim = done_ccb->ccb_h.path->bus->sim; 4277 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4278 sim_links.tqe); 4279 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4280 if ((sim->flags & (CAM_SIM_ON_DONEQ | CAM_SIM_POLLED | 4281 CAM_SIM_BATCH)) == 0) { 4282 mtx_lock(&cam_simq_lock); 4283 first = TAILQ_EMPTY(&cam_simq); 4284 TAILQ_INSERT_TAIL(&cam_simq, sim, links); 4285 mtx_unlock(&cam_simq_lock); 4286 sim->flags |= CAM_SIM_ON_DONEQ; 4287 if (first) 4288 swi_sched(cambio_ih, 0); 4289 } 4290 } 4291 } 4292 4293 void 4294 xpt_batch_start(struct cam_sim *sim) 4295 { 4296 4297 KASSERT((sim->flags & CAM_SIM_BATCH) == 0, ("Batch flag already set")); 4298 sim->flags |= CAM_SIM_BATCH; 4299 } 4300 4301 void 4302 xpt_batch_done(struct cam_sim *sim) 4303 { 4304 4305 KASSERT((sim->flags & CAM_SIM_BATCH) != 0, ("Batch flag was not set")); 4306 sim->flags &= ~CAM_SIM_BATCH; 4307 if (!TAILQ_EMPTY(&sim->sim_doneq) && 4308 (sim->flags & CAM_SIM_ON_DONEQ) == 0) 4309 camisr_runqueue(&sim->sim_doneq); 4310 } 4311 4312 union ccb * 4313 xpt_alloc_ccb() 4314 { 4315 union ccb *new_ccb; 4316 4317 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4318 return (new_ccb); 4319 } 4320 4321 union ccb * 4322 xpt_alloc_ccb_nowait() 4323 { 4324 union ccb *new_ccb; 4325 4326 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4327 return (new_ccb); 4328 } 4329 4330 void 4331 xpt_free_ccb(union ccb *free_ccb) 4332 { 4333 free(free_ccb, M_CAMCCB); 4334 } 4335 4336 4337 4338 /* Private XPT functions */ 4339 4340 /* 4341 * Get a CAM control block for the caller. Charge the structure to the device 4342 * referenced by the path. If the this device has no 'credits' then the 4343 * device already has the maximum number of outstanding operations under way 4344 * and we return NULL. If we don't have sufficient resources to allocate more 4345 * ccbs, we also return NULL. 4346 */ 4347 static union ccb * 4348 xpt_get_ccb(struct cam_ed *device) 4349 { 4350 union ccb *new_ccb; 4351 struct cam_sim *sim; 4352 4353 sim = device->sim; 4354 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4355 new_ccb = xpt_alloc_ccb_nowait(); 4356 if (new_ccb == NULL) { 4357 return (NULL); 4358 } 4359 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4360 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4361 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4362 xpt_links.sle); 4363 sim->ccb_count++; 4364 } 4365 cam_ccbq_take_opening(&device->ccbq); 4366 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4367 return (new_ccb); 4368 } 4369 4370 static void 4371 xpt_release_bus(struct cam_eb *bus) 4372 { 4373 4374 xpt_lock_buses(); 4375 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4376 if (--bus->refcount > 0) { 4377 xpt_unlock_buses(); 4378 return; 4379 } 4380 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4381 ("refcount is zero, but target list is not empty")); 4382 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4383 xsoftc.bus_generation++; 4384 xpt_unlock_buses(); 4385 cam_sim_release(bus->sim); 4386 free(bus, M_CAMXPT); 4387 } 4388 4389 static struct cam_et * 4390 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4391 { 4392 struct cam_et *cur_target, *target; 4393 4394 mtx_assert(bus->sim->mtx, MA_OWNED); 4395 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4396 M_NOWAIT|M_ZERO); 4397 if (target == NULL) 4398 return (NULL); 4399 4400 TAILQ_INIT(&target->ed_entries); 4401 target->bus = bus; 4402 target->target_id = target_id; 4403 target->refcount = 1; 4404 target->generation = 0; 4405 target->luns = NULL; 4406 timevalclear(&target->last_reset); 4407 /* 4408 * Hold a reference to our parent bus so it 4409 * will not go away before we do. 4410 */ 4411 xpt_lock_buses(); 4412 bus->refcount++; 4413 xpt_unlock_buses(); 4414 4415 /* Insertion sort into our bus's target list */ 4416 cur_target = TAILQ_FIRST(&bus->et_entries); 4417 while (cur_target != NULL && cur_target->target_id < target_id) 4418 cur_target = TAILQ_NEXT(cur_target, links); 4419 if (cur_target != NULL) { 4420 TAILQ_INSERT_BEFORE(cur_target, target, links); 4421 } else { 4422 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4423 } 4424 bus->generation++; 4425 return (target); 4426 } 4427 4428 static void 4429 xpt_release_target(struct cam_et *target) 4430 { 4431 4432 mtx_assert(target->bus->sim->mtx, MA_OWNED); 4433 if (--target->refcount > 0) 4434 return; 4435 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4436 ("refcount is zero, but device list is not empty")); 4437 TAILQ_REMOVE(&target->bus->et_entries, target, links); 4438 target->bus->generation++; 4439 xpt_release_bus(target->bus); 4440 if (target->luns) 4441 free(target->luns, M_CAMXPT); 4442 free(target, M_CAMXPT); 4443 } 4444 4445 static struct cam_ed * 4446 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4447 lun_id_t lun_id) 4448 { 4449 struct cam_ed *device; 4450 4451 device = xpt_alloc_device(bus, target, lun_id); 4452 if (device == NULL) 4453 return (NULL); 4454 4455 device->mintags = 1; 4456 device->maxtags = 1; 4457 bus->sim->max_ccbs += device->ccbq.devq_openings; 4458 return (device); 4459 } 4460 4461 struct cam_ed * 4462 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4463 { 4464 struct cam_ed *cur_device, *device; 4465 struct cam_devq *devq; 4466 cam_status status; 4467 4468 mtx_assert(target->bus->sim->mtx, MA_OWNED); 4469 /* Make space for us in the device queue on our bus */ 4470 devq = bus->sim->devq; 4471 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4472 if (status != CAM_REQ_CMP) 4473 return (NULL); 4474 4475 device = (struct cam_ed *)malloc(sizeof(*device), 4476 M_CAMDEV, M_NOWAIT|M_ZERO); 4477 if (device == NULL) 4478 return (NULL); 4479 4480 cam_init_pinfo(&device->devq_entry.pinfo); 4481 device->devq_entry.device = device; 4482 device->target = target; 4483 device->lun_id = lun_id; 4484 device->sim = bus->sim; 4485 /* Initialize our queues */ 4486 if (camq_init(&device->drvq, 0) != 0) { 4487 free(device, M_CAMDEV); 4488 return (NULL); 4489 } 4490 if (cam_ccbq_init(&device->ccbq, 4491 bus->sim->max_dev_openings) != 0) { 4492 camq_fini(&device->drvq); 4493 free(device, M_CAMDEV); 4494 return (NULL); 4495 } 4496 SLIST_INIT(&device->asyncs); 4497 SLIST_INIT(&device->periphs); 4498 device->generation = 0; 4499 device->flags = CAM_DEV_UNCONFIGURED; 4500 device->tag_delay_count = 0; 4501 device->tag_saved_openings = 0; 4502 device->refcount = 1; 4503 callout_init_mtx(&device->callout, bus->sim->mtx, 0); 4504 4505 cur_device = TAILQ_FIRST(&target->ed_entries); 4506 while (cur_device != NULL && cur_device->lun_id < lun_id) 4507 cur_device = TAILQ_NEXT(cur_device, links); 4508 if (cur_device != NULL) 4509 TAILQ_INSERT_BEFORE(cur_device, device, links); 4510 else 4511 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4512 target->refcount++; 4513 target->generation++; 4514 return (device); 4515 } 4516 4517 void 4518 xpt_acquire_device(struct cam_ed *device) 4519 { 4520 4521 mtx_assert(device->sim->mtx, MA_OWNED); 4522 device->refcount++; 4523 } 4524 4525 void 4526 xpt_release_device(struct cam_ed *device) 4527 { 4528 struct cam_devq *devq; 4529 4530 mtx_assert(device->sim->mtx, MA_OWNED); 4531 if (--device->refcount > 0) 4532 return; 4533 4534 KASSERT(SLIST_EMPTY(&device->periphs), 4535 ("refcount is zero, but periphs list is not empty")); 4536 if (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4537 panic("Removing device while still queued for ccbs"); 4538 4539 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4540 callout_stop(&device->callout); 4541 4542 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4543 device->target->generation++; 4544 device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings; 4545 /* Release our slot in the devq */ 4546 devq = device->target->bus->sim->devq; 4547 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4548 camq_fini(&device->drvq); 4549 cam_ccbq_fini(&device->ccbq); 4550 /* 4551 * Free allocated memory. free(9) does nothing if the 4552 * supplied pointer is NULL, so it is safe to call without 4553 * checking. 4554 */ 4555 free(device->supported_vpds, M_CAMXPT); 4556 free(device->device_id, M_CAMXPT); 4557 free(device->physpath, M_CAMXPT); 4558 free(device->rcap_buf, M_CAMXPT); 4559 free(device->serial_num, M_CAMXPT); 4560 4561 xpt_release_target(device->target); 4562 free(device, M_CAMDEV); 4563 } 4564 4565 u_int32_t 4566 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4567 { 4568 int diff; 4569 int result; 4570 struct cam_ed *dev; 4571 4572 dev = path->device; 4573 4574 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4575 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4576 if (result == CAM_REQ_CMP && (diff < 0)) { 4577 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4578 } 4579 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4580 || (dev->inq_flags & SID_CmdQue) != 0) 4581 dev->tag_saved_openings = newopenings; 4582 /* Adjust the global limit */ 4583 dev->sim->max_ccbs += diff; 4584 return (result); 4585 } 4586 4587 static struct cam_eb * 4588 xpt_find_bus(path_id_t path_id) 4589 { 4590 struct cam_eb *bus; 4591 4592 xpt_lock_buses(); 4593 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4594 bus != NULL; 4595 bus = TAILQ_NEXT(bus, links)) { 4596 if (bus->path_id == path_id) { 4597 bus->refcount++; 4598 break; 4599 } 4600 } 4601 xpt_unlock_buses(); 4602 return (bus); 4603 } 4604 4605 static struct cam_et * 4606 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4607 { 4608 struct cam_et *target; 4609 4610 mtx_assert(bus->sim->mtx, MA_OWNED); 4611 for (target = TAILQ_FIRST(&bus->et_entries); 4612 target != NULL; 4613 target = TAILQ_NEXT(target, links)) { 4614 if (target->target_id == target_id) { 4615 target->refcount++; 4616 break; 4617 } 4618 } 4619 return (target); 4620 } 4621 4622 static struct cam_ed * 4623 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4624 { 4625 struct cam_ed *device; 4626 4627 mtx_assert(target->bus->sim->mtx, MA_OWNED); 4628 for (device = TAILQ_FIRST(&target->ed_entries); 4629 device != NULL; 4630 device = TAILQ_NEXT(device, links)) { 4631 if (device->lun_id == lun_id) { 4632 device->refcount++; 4633 break; 4634 } 4635 } 4636 return (device); 4637 } 4638 4639 void 4640 xpt_start_tags(struct cam_path *path) 4641 { 4642 struct ccb_relsim crs; 4643 struct cam_ed *device; 4644 struct cam_sim *sim; 4645 int newopenings; 4646 4647 device = path->device; 4648 sim = path->bus->sim; 4649 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4650 xpt_freeze_devq(path, /*count*/1); 4651 device->inq_flags |= SID_CmdQue; 4652 if (device->tag_saved_openings != 0) 4653 newopenings = device->tag_saved_openings; 4654 else 4655 newopenings = min(device->maxtags, 4656 sim->max_tagged_dev_openings); 4657 xpt_dev_ccbq_resize(path, newopenings); 4658 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4659 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4660 crs.ccb_h.func_code = XPT_REL_SIMQ; 4661 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4662 crs.openings 4663 = crs.release_timeout 4664 = crs.qfrozen_cnt 4665 = 0; 4666 xpt_action((union ccb *)&crs); 4667 } 4668 4669 void 4670 xpt_stop_tags(struct cam_path *path) 4671 { 4672 struct ccb_relsim crs; 4673 struct cam_ed *device; 4674 struct cam_sim *sim; 4675 4676 device = path->device; 4677 sim = path->bus->sim; 4678 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4679 device->tag_delay_count = 0; 4680 xpt_freeze_devq(path, /*count*/1); 4681 device->inq_flags &= ~SID_CmdQue; 4682 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4683 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4684 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4685 crs.ccb_h.func_code = XPT_REL_SIMQ; 4686 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4687 crs.openings 4688 = crs.release_timeout 4689 = crs.qfrozen_cnt 4690 = 0; 4691 xpt_action((union ccb *)&crs); 4692 } 4693 4694 static void 4695 xpt_boot_delay(void *arg) 4696 { 4697 4698 xpt_release_boot(); 4699 } 4700 4701 static void 4702 xpt_config(void *arg) 4703 { 4704 /* 4705 * Now that interrupts are enabled, go find our devices 4706 */ 4707 4708 /* Setup debugging path */ 4709 if (cam_dflags != CAM_DEBUG_NONE) { 4710 if (xpt_create_path_unlocked(&cam_dpath, NULL, 4711 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4712 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4713 printf("xpt_config: xpt_create_path() failed for debug" 4714 " target %d:%d:%d, debugging disabled\n", 4715 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4716 cam_dflags = CAM_DEBUG_NONE; 4717 } 4718 } else 4719 cam_dpath = NULL; 4720 4721 periphdriver_init(1); 4722 xpt_hold_boot(); 4723 callout_init(&xsoftc.boot_callout, 1); 4724 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000, 4725 xpt_boot_delay, NULL); 4726 /* Fire up rescan thread. */ 4727 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) { 4728 printf("xpt_config: failed to create rescan thread.\n"); 4729 } 4730 } 4731 4732 void 4733 xpt_hold_boot(void) 4734 { 4735 xpt_lock_buses(); 4736 xsoftc.buses_to_config++; 4737 xpt_unlock_buses(); 4738 } 4739 4740 void 4741 xpt_release_boot(void) 4742 { 4743 xpt_lock_buses(); 4744 xsoftc.buses_to_config--; 4745 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 4746 struct xpt_task *task; 4747 4748 xsoftc.buses_config_done = 1; 4749 xpt_unlock_buses(); 4750 /* Call manually because we don't have any busses */ 4751 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4752 if (task != NULL) { 4753 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4754 taskqueue_enqueue(taskqueue_thread, &task->task); 4755 } 4756 } else 4757 xpt_unlock_buses(); 4758 } 4759 4760 /* 4761 * If the given device only has one peripheral attached to it, and if that 4762 * peripheral is the passthrough driver, announce it. This insures that the 4763 * user sees some sort of announcement for every peripheral in their system. 4764 */ 4765 static int 4766 xptpassannouncefunc(struct cam_ed *device, void *arg) 4767 { 4768 struct cam_periph *periph; 4769 int i; 4770 4771 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 4772 periph = SLIST_NEXT(periph, periph_links), i++); 4773 4774 periph = SLIST_FIRST(&device->periphs); 4775 if ((i == 1) 4776 && (strncmp(periph->periph_name, "pass", 4) == 0)) 4777 xpt_announce_periph(periph, NULL); 4778 4779 return(1); 4780 } 4781 4782 static void 4783 xpt_finishconfig_task(void *context, int pending) 4784 { 4785 4786 periphdriver_init(2); 4787 /* 4788 * Check for devices with no "standard" peripheral driver 4789 * attached. For any devices like that, announce the 4790 * passthrough driver so the user will see something. 4791 */ 4792 if (!bootverbose) 4793 xpt_for_all_devices(xptpassannouncefunc, NULL); 4794 4795 /* Release our hook so that the boot can continue. */ 4796 config_intrhook_disestablish(xsoftc.xpt_config_hook); 4797 free(xsoftc.xpt_config_hook, M_CAMXPT); 4798 xsoftc.xpt_config_hook = NULL; 4799 4800 free(context, M_CAMXPT); 4801 } 4802 4803 cam_status 4804 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 4805 struct cam_path *path) 4806 { 4807 struct ccb_setasync csa; 4808 cam_status status; 4809 int xptpath = 0; 4810 4811 if (path == NULL) { 4812 mtx_lock(&xsoftc.xpt_lock); 4813 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 4814 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4815 if (status != CAM_REQ_CMP) { 4816 mtx_unlock(&xsoftc.xpt_lock); 4817 return (status); 4818 } 4819 xptpath = 1; 4820 } 4821 4822 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 4823 csa.ccb_h.func_code = XPT_SASYNC_CB; 4824 csa.event_enable = event; 4825 csa.callback = cbfunc; 4826 csa.callback_arg = cbarg; 4827 xpt_action((union ccb *)&csa); 4828 status = csa.ccb_h.status; 4829 4830 if (xptpath) { 4831 xpt_free_path(path); 4832 mtx_unlock(&xsoftc.xpt_lock); 4833 } 4834 4835 if ((status == CAM_REQ_CMP) && 4836 (csa.event_enable & AC_FOUND_DEVICE)) { 4837 /* 4838 * Get this peripheral up to date with all 4839 * the currently existing devices. 4840 */ 4841 xpt_for_all_devices(xptsetasyncfunc, &csa); 4842 } 4843 if ((status == CAM_REQ_CMP) && 4844 (csa.event_enable & AC_PATH_REGISTERED)) { 4845 /* 4846 * Get this peripheral up to date with all 4847 * the currently existing busses. 4848 */ 4849 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 4850 } 4851 4852 return (status); 4853 } 4854 4855 static void 4856 xptaction(struct cam_sim *sim, union ccb *work_ccb) 4857 { 4858 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 4859 4860 switch (work_ccb->ccb_h.func_code) { 4861 /* Common cases first */ 4862 case XPT_PATH_INQ: /* Path routing inquiry */ 4863 { 4864 struct ccb_pathinq *cpi; 4865 4866 cpi = &work_ccb->cpi; 4867 cpi->version_num = 1; /* XXX??? */ 4868 cpi->hba_inquiry = 0; 4869 cpi->target_sprt = 0; 4870 cpi->hba_misc = 0; 4871 cpi->hba_eng_cnt = 0; 4872 cpi->max_target = 0; 4873 cpi->max_lun = 0; 4874 cpi->initiator_id = 0; 4875 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 4876 strncpy(cpi->hba_vid, "", HBA_IDLEN); 4877 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 4878 cpi->unit_number = sim->unit_number; 4879 cpi->bus_id = sim->bus_id; 4880 cpi->base_transfer_speed = 0; 4881 cpi->protocol = PROTO_UNSPECIFIED; 4882 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 4883 cpi->transport = XPORT_UNSPECIFIED; 4884 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 4885 cpi->ccb_h.status = CAM_REQ_CMP; 4886 xpt_done(work_ccb); 4887 break; 4888 } 4889 default: 4890 work_ccb->ccb_h.status = CAM_REQ_INVALID; 4891 xpt_done(work_ccb); 4892 break; 4893 } 4894 } 4895 4896 /* 4897 * The xpt as a "controller" has no interrupt sources, so polling 4898 * is a no-op. 4899 */ 4900 static void 4901 xptpoll(struct cam_sim *sim) 4902 { 4903 } 4904 4905 void 4906 xpt_lock_buses(void) 4907 { 4908 mtx_lock(&xsoftc.xpt_topo_lock); 4909 } 4910 4911 void 4912 xpt_unlock_buses(void) 4913 { 4914 mtx_unlock(&xsoftc.xpt_topo_lock); 4915 } 4916 4917 static void 4918 camisr(void *dummy) 4919 { 4920 cam_simq_t queue; 4921 struct cam_sim *sim; 4922 4923 mtx_lock(&cam_simq_lock); 4924 TAILQ_INIT(&queue); 4925 while (!TAILQ_EMPTY(&cam_simq)) { 4926 TAILQ_CONCAT(&queue, &cam_simq, links); 4927 mtx_unlock(&cam_simq_lock); 4928 4929 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 4930 TAILQ_REMOVE(&queue, sim, links); 4931 CAM_SIM_LOCK(sim); 4932 camisr_runqueue(&sim->sim_doneq); 4933 sim->flags &= ~CAM_SIM_ON_DONEQ; 4934 CAM_SIM_UNLOCK(sim); 4935 } 4936 mtx_lock(&cam_simq_lock); 4937 } 4938 mtx_unlock(&cam_simq_lock); 4939 } 4940 4941 static void 4942 camisr_runqueue(void *V_queue) 4943 { 4944 cam_isrq_t *queue = V_queue; 4945 struct ccb_hdr *ccb_h; 4946 4947 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 4948 int runq; 4949 4950 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 4951 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 4952 4953 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 4954 ("camisr\n")); 4955 4956 runq = FALSE; 4957 4958 if (ccb_h->flags & CAM_HIGH_POWER) { 4959 struct highpowerlist *hphead; 4960 union ccb *send_ccb; 4961 4962 mtx_lock(&xsoftc.xpt_lock); 4963 hphead = &xsoftc.highpowerq; 4964 4965 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 4966 4967 /* 4968 * Increment the count since this command is done. 4969 */ 4970 xsoftc.num_highpower++; 4971 4972 /* 4973 * Any high powered commands queued up? 4974 */ 4975 if (send_ccb != NULL) { 4976 4977 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 4978 mtx_unlock(&xsoftc.xpt_lock); 4979 4980 xpt_release_devq(send_ccb->ccb_h.path, 4981 /*count*/1, /*runqueue*/TRUE); 4982 } else 4983 mtx_unlock(&xsoftc.xpt_lock); 4984 } 4985 4986 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 4987 struct cam_ed *dev; 4988 4989 dev = ccb_h->path->device; 4990 4991 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 4992 ccb_h->path->bus->sim->devq->send_active--; 4993 ccb_h->path->bus->sim->devq->send_openings++; 4994 runq = TRUE; 4995 4996 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 4997 && (dev->ccbq.dev_active == 0))) { 4998 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 4999 xpt_release_devq(ccb_h->path, /*count*/1, 5000 /*run_queue*/FALSE); 5001 } 5002 5003 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5004 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5005 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5006 xpt_release_devq(ccb_h->path, /*count*/1, 5007 /*run_queue*/FALSE); 5008 } 5009 5010 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5011 && (--dev->tag_delay_count == 0)) 5012 xpt_start_tags(ccb_h->path); 5013 if (!device_is_queued(dev)) { 5014 (void)xpt_schedule_devq( 5015 ccb_h->path->bus->sim->devq, dev); 5016 } 5017 } 5018 5019 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5020 xpt_release_simq(ccb_h->path->bus->sim, 5021 /*run_queue*/TRUE); 5022 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5023 runq = FALSE; 5024 } 5025 5026 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5027 && (ccb_h->status & CAM_DEV_QFRZN)) { 5028 xpt_release_devq(ccb_h->path, /*count*/1, 5029 /*run_queue*/TRUE); 5030 ccb_h->status &= ~CAM_DEV_QFRZN; 5031 } else if (runq) { 5032 xpt_run_devq(ccb_h->path->bus->sim->devq); 5033 } 5034 5035 /* Call the peripheral driver's callback */ 5036 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5037 } 5038 } 5039