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sys/cam/cam_xpt.c
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1 /*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD: releng/11.2/sys/cam/cam_xpt.c 330926 2018-03-14 09:57:58Z tijl $"); 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/proc.h> 44 #include <sys/sbuf.h> 45 #include <sys/smp.h> 46 #include <sys/taskqueue.h> 47 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 #include <sys/sysctl.h> 51 #include <sys/kthread.h> 52 53 #include <cam/cam.h> 54 #include <cam/cam_ccb.h> 55 #include <cam/cam_periph.h> 56 #include <cam/cam_queue.h> 57 #include <cam/cam_sim.h> 58 #include <cam/cam_xpt.h> 59 #include <cam/cam_xpt_sim.h> 60 #include <cam/cam_xpt_periph.h> 61 #include <cam/cam_xpt_internal.h> 62 #include <cam/cam_debug.h> 63 #include <cam/cam_compat.h> 64 65 #include <cam/scsi/scsi_all.h> 66 #include <cam/scsi/scsi_message.h> 67 #include <cam/scsi/scsi_pass.h> 68 69 #include <machine/md_var.h> /* geometry translation */ 70 #include <machine/stdarg.h> /* for xpt_print below */ 71 72 #include "opt_cam.h" 73 74 /* 75 * This is the maximum number of high powered commands (e.g. start unit) 76 * that can be outstanding at a particular time. 77 */ 78 #ifndef CAM_MAX_HIGHPOWER 79 #define CAM_MAX_HIGHPOWER 4 80 #endif 81 82 /* Datastructures internal to the xpt layer */ 83 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 84 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 85 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 86 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 87 88 /* Object for defering XPT actions to a taskqueue */ 89 struct xpt_task { 90 struct task task; 91 void *data1; 92 uintptr_t data2; 93 }; 94 95 struct xpt_softc { 96 uint32_t xpt_generation; 97 98 /* number of high powered commands that can go through right now */ 99 struct mtx xpt_highpower_lock; 100 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 101 int num_highpower; 102 103 /* queue for handling async rescan requests. */ 104 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 105 int buses_to_config; 106 int buses_config_done; 107 108 /* Registered busses */ 109 TAILQ_HEAD(,cam_eb) xpt_busses; 110 u_int bus_generation; 111 112 struct intr_config_hook *xpt_config_hook; 113 114 int boot_delay; 115 struct callout boot_callout; 116 117 struct mtx xpt_topo_lock; 118 struct mtx xpt_lock; 119 struct taskqueue *xpt_taskq; 120 }; 121 122 typedef enum { 123 DM_RET_COPY = 0x01, 124 DM_RET_FLAG_MASK = 0x0f, 125 DM_RET_NONE = 0x00, 126 DM_RET_STOP = 0x10, 127 DM_RET_DESCEND = 0x20, 128 DM_RET_ERROR = 0x30, 129 DM_RET_ACTION_MASK = 0xf0 130 } dev_match_ret; 131 132 typedef enum { 133 XPT_DEPTH_BUS, 134 XPT_DEPTH_TARGET, 135 XPT_DEPTH_DEVICE, 136 XPT_DEPTH_PERIPH 137 } xpt_traverse_depth; 138 139 struct xpt_traverse_config { 140 xpt_traverse_depth depth; 141 void *tr_func; 142 void *tr_arg; 143 }; 144 145 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 146 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 147 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 148 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 149 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 150 151 /* Transport layer configuration information */ 152 static struct xpt_softc xsoftc; 153 154 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF); 155 156 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 157 &xsoftc.boot_delay, 0, "Bus registration wait time"); 158 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD, 159 &xsoftc.xpt_generation, 0, "CAM peripheral generation count"); 160 161 struct cam_doneq { 162 struct mtx_padalign cam_doneq_mtx; 163 STAILQ_HEAD(, ccb_hdr) cam_doneq; 164 int cam_doneq_sleep; 165 }; 166 167 static struct cam_doneq cam_doneqs[MAXCPU]; 168 static int cam_num_doneqs; 169 static struct proc *cam_proc; 170 171 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 172 &cam_num_doneqs, 0, "Number of completion queues/threads"); 173 174 struct cam_periph *xpt_periph; 175 176 static periph_init_t xpt_periph_init; 177 178 static struct periph_driver xpt_driver = 179 { 180 xpt_periph_init, "xpt", 181 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 182 CAM_PERIPH_DRV_EARLY 183 }; 184 185 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 186 187 static d_open_t xptopen; 188 static d_close_t xptclose; 189 static d_ioctl_t xptioctl; 190 static d_ioctl_t xptdoioctl; 191 192 static struct cdevsw xpt_cdevsw = { 193 .d_version = D_VERSION, 194 .d_flags = 0, 195 .d_open = xptopen, 196 .d_close = xptclose, 197 .d_ioctl = xptioctl, 198 .d_name = "xpt", 199 }; 200 201 /* Storage for debugging datastructures */ 202 struct cam_path *cam_dpath; 203 u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 204 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN, 205 &cam_dflags, 0, "Enabled debug flags"); 206 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 207 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN, 208 &cam_debug_delay, 0, "Delay in us after each debug message"); 209 210 /* Our boot-time initialization hook */ 211 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 212 213 static moduledata_t cam_moduledata = { 214 "cam", 215 cam_module_event_handler, 216 NULL 217 }; 218 219 static int xpt_init(void *); 220 221 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 222 MODULE_VERSION(cam, 1); 223 224 225 static void xpt_async_bcast(struct async_list *async_head, 226 u_int32_t async_code, 227 struct cam_path *path, 228 void *async_arg); 229 static path_id_t xptnextfreepathid(void); 230 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 231 static union ccb *xpt_get_ccb(struct cam_periph *periph); 232 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 233 static void xpt_run_allocq(struct cam_periph *periph, int sleep); 234 static void xpt_run_allocq_task(void *context, int pending); 235 static void xpt_run_devq(struct cam_devq *devq); 236 static timeout_t xpt_release_devq_timeout; 237 static void xpt_release_simq_timeout(void *arg) __unused; 238 static void xpt_acquire_bus(struct cam_eb *bus); 239 static void xpt_release_bus(struct cam_eb *bus); 240 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 241 static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 242 int run_queue); 243 static struct cam_et* 244 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 245 static void xpt_acquire_target(struct cam_et *target); 246 static void xpt_release_target(struct cam_et *target); 247 static struct cam_eb* 248 xpt_find_bus(path_id_t path_id); 249 static struct cam_et* 250 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 251 static struct cam_ed* 252 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 253 static void xpt_config(void *arg); 254 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 255 u_int32_t new_priority); 256 static xpt_devicefunc_t xptpassannouncefunc; 257 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 258 static void xptpoll(struct cam_sim *sim); 259 static void camisr_runqueue(void); 260 static void xpt_done_process(struct ccb_hdr *ccb_h); 261 static void xpt_done_td(void *); 262 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 263 u_int num_patterns, struct cam_eb *bus); 264 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 265 u_int num_patterns, 266 struct cam_ed *device); 267 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 268 u_int num_patterns, 269 struct cam_periph *periph); 270 static xpt_busfunc_t xptedtbusfunc; 271 static xpt_targetfunc_t xptedttargetfunc; 272 static xpt_devicefunc_t xptedtdevicefunc; 273 static xpt_periphfunc_t xptedtperiphfunc; 274 static xpt_pdrvfunc_t xptplistpdrvfunc; 275 static xpt_periphfunc_t xptplistperiphfunc; 276 static int xptedtmatch(struct ccb_dev_match *cdm); 277 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 278 static int xptbustraverse(struct cam_eb *start_bus, 279 xpt_busfunc_t *tr_func, void *arg); 280 static int xpttargettraverse(struct cam_eb *bus, 281 struct cam_et *start_target, 282 xpt_targetfunc_t *tr_func, void *arg); 283 static int xptdevicetraverse(struct cam_et *target, 284 struct cam_ed *start_device, 285 xpt_devicefunc_t *tr_func, void *arg); 286 static int xptperiphtraverse(struct cam_ed *device, 287 struct cam_periph *start_periph, 288 xpt_periphfunc_t *tr_func, void *arg); 289 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 290 xpt_pdrvfunc_t *tr_func, void *arg); 291 static int xptpdperiphtraverse(struct periph_driver **pdrv, 292 struct cam_periph *start_periph, 293 xpt_periphfunc_t *tr_func, 294 void *arg); 295 static xpt_busfunc_t xptdefbusfunc; 296 static xpt_targetfunc_t xptdeftargetfunc; 297 static xpt_devicefunc_t xptdefdevicefunc; 298 static xpt_periphfunc_t xptdefperiphfunc; 299 static void xpt_finishconfig_task(void *context, int pending); 300 static void xpt_dev_async_default(u_int32_t async_code, 301 struct cam_eb *bus, 302 struct cam_et *target, 303 struct cam_ed *device, 304 void *async_arg); 305 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 306 struct cam_et *target, 307 lun_id_t lun_id); 308 static xpt_devicefunc_t xptsetasyncfunc; 309 static xpt_busfunc_t xptsetasyncbusfunc; 310 static cam_status xptregister(struct cam_periph *periph, 311 void *arg); 312 static const char * xpt_action_name(uint32_t action); 313 static __inline int device_is_queued(struct cam_ed *device); 314 315 static __inline int 316 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 317 { 318 int retval; 319 320 mtx_assert(&devq->send_mtx, MA_OWNED); 321 if ((dev->ccbq.queue.entries > 0) && 322 (dev->ccbq.dev_openings > 0) && 323 (dev->ccbq.queue.qfrozen_cnt == 0)) { 324 /* 325 * The priority of a device waiting for controller 326 * resources is that of the highest priority CCB 327 * enqueued. 328 */ 329 retval = 330 xpt_schedule_dev(&devq->send_queue, 331 &dev->devq_entry, 332 CAMQ_GET_PRIO(&dev->ccbq.queue)); 333 } else { 334 retval = 0; 335 } 336 return (retval); 337 } 338 339 static __inline int 340 device_is_queued(struct cam_ed *device) 341 { 342 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 343 } 344 345 static void 346 xpt_periph_init() 347 { 348 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 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 return(0); 370 } 371 372 static int 373 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 374 { 375 376 return(0); 377 } 378 379 /* 380 * Don't automatically grab the xpt softc lock here even though this is going 381 * through the xpt device. The xpt device is really just a back door for 382 * accessing other devices and SIMs, so the right thing to do is to grab 383 * the appropriate SIM lock once the bus/SIM is located. 384 */ 385 static int 386 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 387 { 388 int error; 389 390 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 391 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 392 } 393 return (error); 394 } 395 396 static int 397 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 398 { 399 int error; 400 401 error = 0; 402 403 switch(cmd) { 404 /* 405 * For the transport layer CAMIOCOMMAND ioctl, we really only want 406 * to accept CCB types that don't quite make sense to send through a 407 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 408 * in the CAM spec. 409 */ 410 case CAMIOCOMMAND: { 411 union ccb *ccb; 412 union ccb *inccb; 413 struct cam_eb *bus; 414 415 inccb = (union ccb *)addr; 416 417 if (inccb->ccb_h.flags & CAM_UNLOCKED) 418 return (EINVAL); 419 420 bus = xpt_find_bus(inccb->ccb_h.path_id); 421 if (bus == NULL) 422 return (EINVAL); 423 424 switch (inccb->ccb_h.func_code) { 425 case XPT_SCAN_BUS: 426 case XPT_RESET_BUS: 427 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 428 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 429 xpt_release_bus(bus); 430 return (EINVAL); 431 } 432 break; 433 case XPT_SCAN_TGT: 434 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 435 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 436 xpt_release_bus(bus); 437 return (EINVAL); 438 } 439 break; 440 default: 441 break; 442 } 443 444 switch(inccb->ccb_h.func_code) { 445 case XPT_SCAN_BUS: 446 case XPT_RESET_BUS: 447 case XPT_PATH_INQ: 448 case XPT_ENG_INQ: 449 case XPT_SCAN_LUN: 450 case XPT_SCAN_TGT: 451 452 ccb = xpt_alloc_ccb(); 453 454 /* 455 * Create a path using the bus, target, and lun the 456 * user passed in. 457 */ 458 if (xpt_create_path(&ccb->ccb_h.path, NULL, 459 inccb->ccb_h.path_id, 460 inccb->ccb_h.target_id, 461 inccb->ccb_h.target_lun) != 462 CAM_REQ_CMP){ 463 error = EINVAL; 464 xpt_free_ccb(ccb); 465 break; 466 } 467 /* Ensure all of our fields are correct */ 468 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 469 inccb->ccb_h.pinfo.priority); 470 xpt_merge_ccb(ccb, inccb); 471 xpt_path_lock(ccb->ccb_h.path); 472 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 473 xpt_path_unlock(ccb->ccb_h.path); 474 bcopy(ccb, inccb, sizeof(union ccb)); 475 xpt_free_path(ccb->ccb_h.path); 476 xpt_free_ccb(ccb); 477 break; 478 479 case XPT_DEBUG: { 480 union ccb ccb; 481 482 /* 483 * This is an immediate CCB, so it's okay to 484 * allocate it on the stack. 485 */ 486 487 /* 488 * Create a path using the bus, target, and lun the 489 * user passed in. 490 */ 491 if (xpt_create_path(&ccb.ccb_h.path, NULL, 492 inccb->ccb_h.path_id, 493 inccb->ccb_h.target_id, 494 inccb->ccb_h.target_lun) != 495 CAM_REQ_CMP){ 496 error = EINVAL; 497 break; 498 } 499 /* Ensure all of our fields are correct */ 500 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 501 inccb->ccb_h.pinfo.priority); 502 xpt_merge_ccb(&ccb, inccb); 503 xpt_action(&ccb); 504 bcopy(&ccb, inccb, sizeof(union ccb)); 505 xpt_free_path(ccb.ccb_h.path); 506 break; 507 508 } 509 case XPT_DEV_MATCH: { 510 struct cam_periph_map_info mapinfo; 511 struct cam_path *old_path; 512 513 /* 514 * We can't deal with physical addresses for this 515 * type of transaction. 516 */ 517 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 518 CAM_DATA_VADDR) { 519 error = EINVAL; 520 break; 521 } 522 523 /* 524 * Save this in case the caller had it set to 525 * something in particular. 526 */ 527 old_path = inccb->ccb_h.path; 528 529 /* 530 * We really don't need a path for the matching 531 * code. The path is needed because of the 532 * debugging statements in xpt_action(). They 533 * assume that the CCB has a valid path. 534 */ 535 inccb->ccb_h.path = xpt_periph->path; 536 537 bzero(&mapinfo, sizeof(mapinfo)); 538 539 /* 540 * Map the pattern and match buffers into kernel 541 * virtual address space. 542 */ 543 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS); 544 545 if (error) { 546 inccb->ccb_h.path = old_path; 547 break; 548 } 549 550 /* 551 * This is an immediate CCB, we can send it on directly. 552 */ 553 xpt_action(inccb); 554 555 /* 556 * Map the buffers back into user space. 557 */ 558 cam_periph_unmapmem(inccb, &mapinfo); 559 560 inccb->ccb_h.path = old_path; 561 562 error = 0; 563 break; 564 } 565 default: 566 error = ENOTSUP; 567 break; 568 } 569 xpt_release_bus(bus); 570 break; 571 } 572 /* 573 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 574 * with the periphal driver name and unit name filled in. The other 575 * fields don't really matter as input. The passthrough driver name 576 * ("pass"), and unit number are passed back in the ccb. The current 577 * device generation number, and the index into the device peripheral 578 * driver list, and the status are also passed back. Note that 579 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 580 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 581 * (or rather should be) impossible for the device peripheral driver 582 * list to change since we look at the whole thing in one pass, and 583 * we do it with lock protection. 584 * 585 */ 586 case CAMGETPASSTHRU: { 587 union ccb *ccb; 588 struct cam_periph *periph; 589 struct periph_driver **p_drv; 590 char *name; 591 u_int unit; 592 int base_periph_found; 593 594 ccb = (union ccb *)addr; 595 unit = ccb->cgdl.unit_number; 596 name = ccb->cgdl.periph_name; 597 base_periph_found = 0; 598 599 /* 600 * Sanity check -- make sure we don't get a null peripheral 601 * driver name. 602 */ 603 if (*ccb->cgdl.periph_name == '\0') { 604 error = EINVAL; 605 break; 606 } 607 608 /* Keep the list from changing while we traverse it */ 609 xpt_lock_buses(); 610 611 /* first find our driver in the list of drivers */ 612 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 613 if (strcmp((*p_drv)->driver_name, name) == 0) 614 break; 615 616 if (*p_drv == NULL) { 617 xpt_unlock_buses(); 618 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 619 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 620 *ccb->cgdl.periph_name = '\0'; 621 ccb->cgdl.unit_number = 0; 622 error = ENOENT; 623 break; 624 } 625 626 /* 627 * Run through every peripheral instance of this driver 628 * and check to see whether it matches the unit passed 629 * in by the user. If it does, get out of the loops and 630 * find the passthrough driver associated with that 631 * peripheral driver. 632 */ 633 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 634 periph = TAILQ_NEXT(periph, unit_links)) { 635 636 if (periph->unit_number == unit) 637 break; 638 } 639 /* 640 * If we found the peripheral driver that the user passed 641 * in, go through all of the peripheral drivers for that 642 * particular device and look for a passthrough driver. 643 */ 644 if (periph != NULL) { 645 struct cam_ed *device; 646 int i; 647 648 base_periph_found = 1; 649 device = periph->path->device; 650 for (i = 0, periph = SLIST_FIRST(&device->periphs); 651 periph != NULL; 652 periph = SLIST_NEXT(periph, periph_links), i++) { 653 /* 654 * Check to see whether we have a 655 * passthrough device or not. 656 */ 657 if (strcmp(periph->periph_name, "pass") == 0) { 658 /* 659 * Fill in the getdevlist fields. 660 */ 661 strlcpy(ccb->cgdl.periph_name, 662 periph->periph_name, 663 sizeof(ccb->cgdl.periph_name)); 664 ccb->cgdl.unit_number = 665 periph->unit_number; 666 if (SLIST_NEXT(periph, periph_links)) 667 ccb->cgdl.status = 668 CAM_GDEVLIST_MORE_DEVS; 669 else 670 ccb->cgdl.status = 671 CAM_GDEVLIST_LAST_DEVICE; 672 ccb->cgdl.generation = 673 device->generation; 674 ccb->cgdl.index = i; 675 /* 676 * Fill in some CCB header fields 677 * that the user may want. 678 */ 679 ccb->ccb_h.path_id = 680 periph->path->bus->path_id; 681 ccb->ccb_h.target_id = 682 periph->path->target->target_id; 683 ccb->ccb_h.target_lun = 684 periph->path->device->lun_id; 685 ccb->ccb_h.status = CAM_REQ_CMP; 686 break; 687 } 688 } 689 } 690 691 /* 692 * If the periph is null here, one of two things has 693 * happened. The first possibility is that we couldn't 694 * find the unit number of the particular peripheral driver 695 * that the user is asking about. e.g. the user asks for 696 * the passthrough driver for "da11". We find the list of 697 * "da" peripherals all right, but there is no unit 11. 698 * The other possibility is that we went through the list 699 * of peripheral drivers attached to the device structure, 700 * but didn't find one with the name "pass". Either way, 701 * we return ENOENT, since we couldn't find something. 702 */ 703 if (periph == NULL) { 704 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 705 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 706 *ccb->cgdl.periph_name = '\0'; 707 ccb->cgdl.unit_number = 0; 708 error = ENOENT; 709 /* 710 * It is unfortunate that this is even necessary, 711 * but there are many, many clueless users out there. 712 * If this is true, the user is looking for the 713 * passthrough driver, but doesn't have one in his 714 * kernel. 715 */ 716 if (base_periph_found == 1) { 717 printf("xptioctl: pass driver is not in the " 718 "kernel\n"); 719 printf("xptioctl: put \"device pass\" in " 720 "your kernel config file\n"); 721 } 722 } 723 xpt_unlock_buses(); 724 break; 725 } 726 default: 727 error = ENOTTY; 728 break; 729 } 730 731 return(error); 732 } 733 734 static int 735 cam_module_event_handler(module_t mod, int what, void *arg) 736 { 737 int error; 738 739 switch (what) { 740 case MOD_LOAD: 741 if ((error = xpt_init(NULL)) != 0) 742 return (error); 743 break; 744 case MOD_UNLOAD: 745 return EBUSY; 746 default: 747 return EOPNOTSUPP; 748 } 749 750 return 0; 751 } 752 753 static struct xpt_proto * 754 xpt_proto_find(cam_proto proto) 755 { 756 struct xpt_proto **pp; 757 758 SET_FOREACH(pp, cam_xpt_proto_set) { 759 if ((*pp)->proto == proto) 760 return *pp; 761 } 762 763 return NULL; 764 } 765 766 static void 767 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 768 { 769 770 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 771 xpt_free_path(done_ccb->ccb_h.path); 772 xpt_free_ccb(done_ccb); 773 } else { 774 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 775 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 776 } 777 xpt_release_boot(); 778 } 779 780 /* thread to handle bus rescans */ 781 static void 782 xpt_scanner_thread(void *dummy) 783 { 784 union ccb *ccb; 785 struct cam_path path; 786 787 xpt_lock_buses(); 788 for (;;) { 789 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 790 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 791 "-", 0); 792 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 793 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 794 xpt_unlock_buses(); 795 796 /* 797 * Since lock can be dropped inside and path freed 798 * by completion callback even before return here, 799 * take our own path copy for reference. 800 */ 801 xpt_copy_path(&path, ccb->ccb_h.path); 802 xpt_path_lock(&path); 803 xpt_action(ccb); 804 xpt_path_unlock(&path); 805 xpt_release_path(&path); 806 807 xpt_lock_buses(); 808 } 809 } 810 } 811 812 void 813 xpt_rescan(union ccb *ccb) 814 { 815 struct ccb_hdr *hdr; 816 817 /* Prepare request */ 818 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 819 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 820 ccb->ccb_h.func_code = XPT_SCAN_BUS; 821 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 822 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 823 ccb->ccb_h.func_code = XPT_SCAN_TGT; 824 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 825 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 826 ccb->ccb_h.func_code = XPT_SCAN_LUN; 827 else { 828 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 829 xpt_free_path(ccb->ccb_h.path); 830 xpt_free_ccb(ccb); 831 return; 832 } 833 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 834 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code, 835 xpt_action_name(ccb->ccb_h.func_code))); 836 837 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 838 ccb->ccb_h.cbfcnp = xpt_rescan_done; 839 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 840 /* Don't make duplicate entries for the same paths. */ 841 xpt_lock_buses(); 842 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 843 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 844 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 845 wakeup(&xsoftc.ccb_scanq); 846 xpt_unlock_buses(); 847 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 848 xpt_free_path(ccb->ccb_h.path); 849 xpt_free_ccb(ccb); 850 return; 851 } 852 } 853 } 854 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 855 xsoftc.buses_to_config++; 856 wakeup(&xsoftc.ccb_scanq); 857 xpt_unlock_buses(); 858 } 859 860 /* Functions accessed by the peripheral drivers */ 861 static int 862 xpt_init(void *dummy) 863 { 864 struct cam_sim *xpt_sim; 865 struct cam_path *path; 866 struct cam_devq *devq; 867 cam_status status; 868 int error, i; 869 870 TAILQ_INIT(&xsoftc.xpt_busses); 871 TAILQ_INIT(&xsoftc.ccb_scanq); 872 STAILQ_INIT(&xsoftc.highpowerq); 873 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 874 875 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 876 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 877 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 878 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 879 880 #ifdef CAM_BOOT_DELAY 881 /* 882 * Override this value at compile time to assist our users 883 * who don't use loader to boot a kernel. 884 */ 885 xsoftc.boot_delay = CAM_BOOT_DELAY; 886 #endif 887 /* 888 * The xpt layer is, itself, the equivalent of a SIM. 889 * Allow 16 ccbs in the ccb pool for it. This should 890 * give decent parallelism when we probe busses and 891 * perform other XPT functions. 892 */ 893 devq = cam_simq_alloc(16); 894 xpt_sim = cam_sim_alloc(xptaction, 895 xptpoll, 896 "xpt", 897 /*softc*/NULL, 898 /*unit*/0, 899 /*mtx*/&xsoftc.xpt_lock, 900 /*max_dev_transactions*/0, 901 /*max_tagged_dev_transactions*/0, 902 devq); 903 if (xpt_sim == NULL) 904 return (ENOMEM); 905 906 mtx_lock(&xsoftc.xpt_lock); 907 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 908 mtx_unlock(&xsoftc.xpt_lock); 909 printf("xpt_init: xpt_bus_register failed with status %#x," 910 " failing attach\n", status); 911 return (EINVAL); 912 } 913 mtx_unlock(&xsoftc.xpt_lock); 914 915 /* 916 * Looking at the XPT from the SIM layer, the XPT is 917 * the equivalent of a peripheral driver. Allocate 918 * a peripheral driver entry for us. 919 */ 920 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 921 CAM_TARGET_WILDCARD, 922 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 923 printf("xpt_init: xpt_create_path failed with status %#x," 924 " failing attach\n", status); 925 return (EINVAL); 926 } 927 xpt_path_lock(path); 928 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 929 path, NULL, 0, xpt_sim); 930 xpt_path_unlock(path); 931 xpt_free_path(path); 932 933 if (cam_num_doneqs < 1) 934 cam_num_doneqs = 1 + mp_ncpus / 6; 935 else if (cam_num_doneqs > MAXCPU) 936 cam_num_doneqs = MAXCPU; 937 for (i = 0; i < cam_num_doneqs; i++) { 938 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 939 MTX_DEF); 940 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 941 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 942 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 943 if (error != 0) { 944 cam_num_doneqs = i; 945 break; 946 } 947 } 948 if (cam_num_doneqs < 1) { 949 printf("xpt_init: Cannot init completion queues " 950 "- failing attach\n"); 951 return (ENOMEM); 952 } 953 /* 954 * Register a callback for when interrupts are enabled. 955 */ 956 xsoftc.xpt_config_hook = 957 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 958 M_CAMXPT, M_NOWAIT | M_ZERO); 959 if (xsoftc.xpt_config_hook == NULL) { 960 printf("xpt_init: Cannot malloc config hook " 961 "- failing attach\n"); 962 return (ENOMEM); 963 } 964 xsoftc.xpt_config_hook->ich_func = xpt_config; 965 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 966 free (xsoftc.xpt_config_hook, M_CAMXPT); 967 printf("xpt_init: config_intrhook_establish failed " 968 "- failing attach\n"); 969 } 970 971 return (0); 972 } 973 974 static cam_status 975 xptregister(struct cam_periph *periph, void *arg) 976 { 977 struct cam_sim *xpt_sim; 978 979 if (periph == NULL) { 980 printf("xptregister: periph was NULL!!\n"); 981 return(CAM_REQ_CMP_ERR); 982 } 983 984 xpt_sim = (struct cam_sim *)arg; 985 xpt_sim->softc = periph; 986 xpt_periph = periph; 987 periph->softc = NULL; 988 989 return(CAM_REQ_CMP); 990 } 991 992 int32_t 993 xpt_add_periph(struct cam_periph *periph) 994 { 995 struct cam_ed *device; 996 int32_t status; 997 998 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 999 device = periph->path->device; 1000 status = CAM_REQ_CMP; 1001 if (device != NULL) { 1002 mtx_lock(&device->target->bus->eb_mtx); 1003 device->generation++; 1004 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 1005 mtx_unlock(&device->target->bus->eb_mtx); 1006 atomic_add_32(&xsoftc.xpt_generation, 1); 1007 } 1008 1009 return (status); 1010 } 1011 1012 void 1013 xpt_remove_periph(struct cam_periph *periph) 1014 { 1015 struct cam_ed *device; 1016 1017 device = periph->path->device; 1018 if (device != NULL) { 1019 mtx_lock(&device->target->bus->eb_mtx); 1020 device->generation++; 1021 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 1022 mtx_unlock(&device->target->bus->eb_mtx); 1023 atomic_add_32(&xsoftc.xpt_generation, 1); 1024 } 1025 } 1026 1027 1028 void 1029 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1030 { 1031 struct cam_path *path = periph->path; 1032 struct xpt_proto *proto; 1033 1034 cam_periph_assert(periph, MA_OWNED); 1035 periph->flags |= CAM_PERIPH_ANNOUNCED; 1036 1037 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1038 periph->periph_name, periph->unit_number, 1039 path->bus->sim->sim_name, 1040 path->bus->sim->unit_number, 1041 path->bus->sim->bus_id, 1042 path->bus->path_id, 1043 path->target->target_id, 1044 (uintmax_t)path->device->lun_id); 1045 printf("%s%d: ", periph->periph_name, periph->unit_number); 1046 proto = xpt_proto_find(path->device->protocol); 1047 if (proto) 1048 proto->ops->announce(path->device); 1049 else 1050 printf("%s%d: Unknown protocol device %d\n", 1051 periph->periph_name, periph->unit_number, 1052 path->device->protocol); 1053 if (path->device->serial_num_len > 0) { 1054 /* Don't wrap the screen - print only the first 60 chars */ 1055 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1056 periph->unit_number, path->device->serial_num); 1057 } 1058 /* Announce transport details. */ 1059 path->bus->xport->ops->announce(periph); 1060 /* Announce command queueing. */ 1061 if (path->device->inq_flags & SID_CmdQue 1062 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1063 printf("%s%d: Command Queueing enabled\n", 1064 periph->periph_name, periph->unit_number); 1065 } 1066 /* Announce caller's details if they've passed in. */ 1067 if (announce_string != NULL) 1068 printf("%s%d: %s\n", periph->periph_name, 1069 periph->unit_number, announce_string); 1070 } 1071 1072 void 1073 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1074 { 1075 if (quirks != 0) { 1076 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1077 periph->unit_number, quirks, bit_string); 1078 } 1079 } 1080 1081 void 1082 xpt_denounce_periph(struct cam_periph *periph) 1083 { 1084 struct cam_path *path = periph->path; 1085 struct xpt_proto *proto; 1086 1087 cam_periph_assert(periph, MA_OWNED); 1088 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1089 periph->periph_name, periph->unit_number, 1090 path->bus->sim->sim_name, 1091 path->bus->sim->unit_number, 1092 path->bus->sim->bus_id, 1093 path->bus->path_id, 1094 path->target->target_id, 1095 (uintmax_t)path->device->lun_id); 1096 printf("%s%d: ", periph->periph_name, periph->unit_number); 1097 proto = xpt_proto_find(path->device->protocol); 1098 if (proto) 1099 proto->ops->denounce(path->device); 1100 else 1101 printf("%s%d: Unknown protocol device %d\n", 1102 periph->periph_name, periph->unit_number, 1103 path->device->protocol); 1104 if (path->device->serial_num_len > 0) 1105 printf(" s/n %.60s", path->device->serial_num); 1106 printf(" detached\n"); 1107 } 1108 1109 1110 int 1111 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1112 { 1113 int ret = -1, l, o; 1114 struct ccb_dev_advinfo cdai; 1115 struct scsi_vpd_id_descriptor *idd; 1116 1117 xpt_path_assert(path, MA_OWNED); 1118 1119 memset(&cdai, 0, sizeof(cdai)); 1120 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1121 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1122 cdai.flags = CDAI_FLAG_NONE; 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") == 0 || 1130 strcmp(attr, "GEOM::lunname") == 0) { 1131 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1132 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1133 } else 1134 goto out; 1135 1136 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO); 1137 if (cdai.buf == NULL) { 1138 ret = ENOMEM; 1139 goto out; 1140 } 1141 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1142 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1143 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1144 if (cdai.provsiz == 0) 1145 goto out; 1146 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) { 1147 if (strcmp(attr, "GEOM::lunid") == 0) { 1148 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1149 cdai.provsiz, scsi_devid_is_lun_naa); 1150 if (idd == NULL) 1151 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1152 cdai.provsiz, scsi_devid_is_lun_eui64); 1153 if (idd == NULL) 1154 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1155 cdai.provsiz, scsi_devid_is_lun_uuid); 1156 if (idd == NULL) 1157 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1158 cdai.provsiz, scsi_devid_is_lun_md5); 1159 } else 1160 idd = NULL; 1161 if (idd == NULL) 1162 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1163 cdai.provsiz, scsi_devid_is_lun_t10); 1164 if (idd == NULL) 1165 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1166 cdai.provsiz, scsi_devid_is_lun_name); 1167 if (idd == NULL) 1168 goto out; 1169 ret = 0; 1170 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) { 1171 if (idd->length < len) { 1172 for (l = 0; l < idd->length; l++) 1173 buf[l] = idd->identifier[l] ? 1174 idd->identifier[l] : ' '; 1175 buf[l] = 0; 1176 } else 1177 ret = EFAULT; 1178 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) { 1179 l = strnlen(idd->identifier, idd->length); 1180 if (l < len) { 1181 bcopy(idd->identifier, buf, l); 1182 buf[l] = 0; 1183 } else 1184 ret = EFAULT; 1185 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID 1186 && idd->identifier[0] == 0x10) { 1187 if ((idd->length - 2) * 2 + 4 < len) { 1188 for (l = 2, o = 0; l < idd->length; l++) { 1189 if (l == 6 || l == 8 || l == 10 || l == 12) 1190 o += sprintf(buf + o, "-"); 1191 o += sprintf(buf + o, "%02x", 1192 idd->identifier[l]); 1193 } 1194 } else 1195 ret = EFAULT; 1196 } else { 1197 if (idd->length * 2 < len) { 1198 for (l = 0; l < idd->length; l++) 1199 sprintf(buf + l * 2, "%02x", 1200 idd->identifier[l]); 1201 } else 1202 ret = EFAULT; 1203 } 1204 } else { 1205 ret = 0; 1206 if (strlcpy(buf, cdai.buf, len) >= len) 1207 ret = EFAULT; 1208 } 1209 1210 out: 1211 if (cdai.buf != NULL) 1212 free(cdai.buf, M_CAMXPT); 1213 return ret; 1214 } 1215 1216 static dev_match_ret 1217 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1218 struct cam_eb *bus) 1219 { 1220 dev_match_ret retval; 1221 u_int i; 1222 1223 retval = DM_RET_NONE; 1224 1225 /* 1226 * If we aren't given something to match against, that's an error. 1227 */ 1228 if (bus == NULL) 1229 return(DM_RET_ERROR); 1230 1231 /* 1232 * If there are no match entries, then this bus matches no 1233 * matter what. 1234 */ 1235 if ((patterns == NULL) || (num_patterns == 0)) 1236 return(DM_RET_DESCEND | DM_RET_COPY); 1237 1238 for (i = 0; i < num_patterns; i++) { 1239 struct bus_match_pattern *cur_pattern; 1240 1241 /* 1242 * If the pattern in question isn't for a bus node, we 1243 * aren't interested. However, we do indicate to the 1244 * calling routine that we should continue descending the 1245 * tree, since the user wants to match against lower-level 1246 * EDT elements. 1247 */ 1248 if (patterns[i].type != DEV_MATCH_BUS) { 1249 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1250 retval |= DM_RET_DESCEND; 1251 continue; 1252 } 1253 1254 cur_pattern = &patterns[i].pattern.bus_pattern; 1255 1256 /* 1257 * If they want to match any bus node, we give them any 1258 * device node. 1259 */ 1260 if (cur_pattern->flags == BUS_MATCH_ANY) { 1261 /* set the copy flag */ 1262 retval |= DM_RET_COPY; 1263 1264 /* 1265 * If we've already decided on an action, go ahead 1266 * and return. 1267 */ 1268 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1269 return(retval); 1270 } 1271 1272 /* 1273 * Not sure why someone would do this... 1274 */ 1275 if (cur_pattern->flags == BUS_MATCH_NONE) 1276 continue; 1277 1278 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1279 && (cur_pattern->path_id != bus->path_id)) 1280 continue; 1281 1282 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1283 && (cur_pattern->bus_id != bus->sim->bus_id)) 1284 continue; 1285 1286 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1287 && (cur_pattern->unit_number != bus->sim->unit_number)) 1288 continue; 1289 1290 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1291 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1292 DEV_IDLEN) != 0)) 1293 continue; 1294 1295 /* 1296 * If we get to this point, the user definitely wants 1297 * information on this bus. So tell the caller to copy the 1298 * data out. 1299 */ 1300 retval |= DM_RET_COPY; 1301 1302 /* 1303 * If the return action has been set to descend, then we 1304 * know that we've already seen a non-bus matching 1305 * expression, therefore we need to further descend the tree. 1306 * This won't change by continuing around the loop, so we 1307 * go ahead and return. If we haven't seen a non-bus 1308 * matching expression, we keep going around the loop until 1309 * we exhaust the matching expressions. We'll set the stop 1310 * flag once we fall out of the loop. 1311 */ 1312 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1313 return(retval); 1314 } 1315 1316 /* 1317 * If the return action hasn't been set to descend yet, that means 1318 * we haven't seen anything other than bus matching patterns. So 1319 * tell the caller to stop descending the tree -- the user doesn't 1320 * want to match against lower level tree elements. 1321 */ 1322 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1323 retval |= DM_RET_STOP; 1324 1325 return(retval); 1326 } 1327 1328 static dev_match_ret 1329 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1330 struct cam_ed *device) 1331 { 1332 dev_match_ret retval; 1333 u_int i; 1334 1335 retval = DM_RET_NONE; 1336 1337 /* 1338 * If we aren't given something to match against, that's an error. 1339 */ 1340 if (device == NULL) 1341 return(DM_RET_ERROR); 1342 1343 /* 1344 * If there are no match entries, then this device matches no 1345 * matter what. 1346 */ 1347 if ((patterns == NULL) || (num_patterns == 0)) 1348 return(DM_RET_DESCEND | DM_RET_COPY); 1349 1350 for (i = 0; i < num_patterns; i++) { 1351 struct device_match_pattern *cur_pattern; 1352 struct scsi_vpd_device_id *device_id_page; 1353 1354 /* 1355 * If the pattern in question isn't for a device node, we 1356 * aren't interested. 1357 */ 1358 if (patterns[i].type != DEV_MATCH_DEVICE) { 1359 if ((patterns[i].type == DEV_MATCH_PERIPH) 1360 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1361 retval |= DM_RET_DESCEND; 1362 continue; 1363 } 1364 1365 cur_pattern = &patterns[i].pattern.device_pattern; 1366 1367 /* Error out if mutually exclusive options are specified. */ 1368 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1369 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1370 return(DM_RET_ERROR); 1371 1372 /* 1373 * If they want to match any device node, we give them any 1374 * device node. 1375 */ 1376 if (cur_pattern->flags == DEV_MATCH_ANY) 1377 goto copy_dev_node; 1378 1379 /* 1380 * Not sure why someone would do this... 1381 */ 1382 if (cur_pattern->flags == DEV_MATCH_NONE) 1383 continue; 1384 1385 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1386 && (cur_pattern->path_id != device->target->bus->path_id)) 1387 continue; 1388 1389 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1390 && (cur_pattern->target_id != device->target->target_id)) 1391 continue; 1392 1393 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1394 && (cur_pattern->target_lun != device->lun_id)) 1395 continue; 1396 1397 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1398 && (cam_quirkmatch((caddr_t)&device->inq_data, 1399 (caddr_t)&cur_pattern->data.inq_pat, 1400 1, sizeof(cur_pattern->data.inq_pat), 1401 scsi_static_inquiry_match) == NULL)) 1402 continue; 1403 1404 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1405 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1406 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1407 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1408 device->device_id_len 1409 - SVPD_DEVICE_ID_HDR_LEN, 1410 cur_pattern->data.devid_pat.id, 1411 cur_pattern->data.devid_pat.id_len) != 0)) 1412 continue; 1413 1414 copy_dev_node: 1415 /* 1416 * If we get to this point, the user definitely wants 1417 * information on this device. So tell the caller to copy 1418 * the data out. 1419 */ 1420 retval |= DM_RET_COPY; 1421 1422 /* 1423 * If the return action has been set to descend, then we 1424 * know that we've already seen a peripheral matching 1425 * expression, therefore we need to further descend the tree. 1426 * This won't change by continuing around the loop, so we 1427 * go ahead and return. If we haven't seen a peripheral 1428 * matching expression, we keep going around the loop until 1429 * we exhaust the matching expressions. We'll set the stop 1430 * flag once we fall out of the loop. 1431 */ 1432 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1433 return(retval); 1434 } 1435 1436 /* 1437 * If the return action hasn't been set to descend yet, that means 1438 * we haven't seen any peripheral matching patterns. So tell the 1439 * caller to stop descending the tree -- the user doesn't want to 1440 * match against lower level tree elements. 1441 */ 1442 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1443 retval |= DM_RET_STOP; 1444 1445 return(retval); 1446 } 1447 1448 /* 1449 * Match a single peripheral against any number of match patterns. 1450 */ 1451 static dev_match_ret 1452 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1453 struct cam_periph *periph) 1454 { 1455 dev_match_ret retval; 1456 u_int i; 1457 1458 /* 1459 * If we aren't given something to match against, that's an error. 1460 */ 1461 if (periph == NULL) 1462 return(DM_RET_ERROR); 1463 1464 /* 1465 * If there are no match entries, then this peripheral matches no 1466 * matter what. 1467 */ 1468 if ((patterns == NULL) || (num_patterns == 0)) 1469 return(DM_RET_STOP | DM_RET_COPY); 1470 1471 /* 1472 * There aren't any nodes below a peripheral node, so there's no 1473 * reason to descend the tree any further. 1474 */ 1475 retval = DM_RET_STOP; 1476 1477 for (i = 0; i < num_patterns; i++) { 1478 struct periph_match_pattern *cur_pattern; 1479 1480 /* 1481 * If the pattern in question isn't for a peripheral, we 1482 * aren't interested. 1483 */ 1484 if (patterns[i].type != DEV_MATCH_PERIPH) 1485 continue; 1486 1487 cur_pattern = &patterns[i].pattern.periph_pattern; 1488 1489 /* 1490 * If they want to match on anything, then we will do so. 1491 */ 1492 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1493 /* set the copy flag */ 1494 retval |= DM_RET_COPY; 1495 1496 /* 1497 * We've already set the return action to stop, 1498 * since there are no nodes below peripherals in 1499 * the tree. 1500 */ 1501 return(retval); 1502 } 1503 1504 /* 1505 * Not sure why someone would do this... 1506 */ 1507 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1508 continue; 1509 1510 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1511 && (cur_pattern->path_id != periph->path->bus->path_id)) 1512 continue; 1513 1514 /* 1515 * For the target and lun id's, we have to make sure the 1516 * target and lun pointers aren't NULL. The xpt peripheral 1517 * has a wildcard target and device. 1518 */ 1519 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1520 && ((periph->path->target == NULL) 1521 ||(cur_pattern->target_id != periph->path->target->target_id))) 1522 continue; 1523 1524 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1525 && ((periph->path->device == NULL) 1526 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1527 continue; 1528 1529 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1530 && (cur_pattern->unit_number != periph->unit_number)) 1531 continue; 1532 1533 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1534 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1535 DEV_IDLEN) != 0)) 1536 continue; 1537 1538 /* 1539 * If we get to this point, the user definitely wants 1540 * information on this peripheral. So tell the caller to 1541 * copy the data out. 1542 */ 1543 retval |= DM_RET_COPY; 1544 1545 /* 1546 * The return action has already been set to stop, since 1547 * peripherals don't have any nodes below them in the EDT. 1548 */ 1549 return(retval); 1550 } 1551 1552 /* 1553 * If we get to this point, the peripheral that was passed in 1554 * doesn't match any of the patterns. 1555 */ 1556 return(retval); 1557 } 1558 1559 static int 1560 xptedtbusfunc(struct cam_eb *bus, void *arg) 1561 { 1562 struct ccb_dev_match *cdm; 1563 struct cam_et *target; 1564 dev_match_ret retval; 1565 1566 cdm = (struct ccb_dev_match *)arg; 1567 1568 /* 1569 * If our position is for something deeper in the tree, that means 1570 * that we've already seen this node. So, we keep going down. 1571 */ 1572 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1573 && (cdm->pos.cookie.bus == bus) 1574 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1575 && (cdm->pos.cookie.target != NULL)) 1576 retval = DM_RET_DESCEND; 1577 else 1578 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1579 1580 /* 1581 * If we got an error, bail out of the search. 1582 */ 1583 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1584 cdm->status = CAM_DEV_MATCH_ERROR; 1585 return(0); 1586 } 1587 1588 /* 1589 * If the copy flag is set, copy this bus out. 1590 */ 1591 if (retval & DM_RET_COPY) { 1592 int spaceleft, j; 1593 1594 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1595 sizeof(struct dev_match_result)); 1596 1597 /* 1598 * If we don't have enough space to put in another 1599 * match result, save our position and tell the 1600 * user there are more devices to check. 1601 */ 1602 if (spaceleft < sizeof(struct dev_match_result)) { 1603 bzero(&cdm->pos, sizeof(cdm->pos)); 1604 cdm->pos.position_type = 1605 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1606 1607 cdm->pos.cookie.bus = bus; 1608 cdm->pos.generations[CAM_BUS_GENERATION]= 1609 xsoftc.bus_generation; 1610 cdm->status = CAM_DEV_MATCH_MORE; 1611 return(0); 1612 } 1613 j = cdm->num_matches; 1614 cdm->num_matches++; 1615 cdm->matches[j].type = DEV_MATCH_BUS; 1616 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1617 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1618 cdm->matches[j].result.bus_result.unit_number = 1619 bus->sim->unit_number; 1620 strlcpy(cdm->matches[j].result.bus_result.dev_name, 1621 bus->sim->sim_name, 1622 sizeof(cdm->matches[j].result.bus_result.dev_name)); 1623 } 1624 1625 /* 1626 * If the user is only interested in busses, there's no 1627 * reason to descend to the next level in the tree. 1628 */ 1629 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1630 return(1); 1631 1632 /* 1633 * If there is a target generation recorded, check it to 1634 * make sure the target list hasn't changed. 1635 */ 1636 mtx_lock(&bus->eb_mtx); 1637 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1638 && (cdm->pos.cookie.bus == bus) 1639 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1640 && (cdm->pos.cookie.target != NULL)) { 1641 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1642 bus->generation)) { 1643 mtx_unlock(&bus->eb_mtx); 1644 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1645 return (0); 1646 } 1647 target = (struct cam_et *)cdm->pos.cookie.target; 1648 target->refcount++; 1649 } else 1650 target = NULL; 1651 mtx_unlock(&bus->eb_mtx); 1652 1653 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1654 } 1655 1656 static int 1657 xptedttargetfunc(struct cam_et *target, void *arg) 1658 { 1659 struct ccb_dev_match *cdm; 1660 struct cam_eb *bus; 1661 struct cam_ed *device; 1662 1663 cdm = (struct ccb_dev_match *)arg; 1664 bus = target->bus; 1665 1666 /* 1667 * If there is a device list generation recorded, check it to 1668 * make sure the device list hasn't changed. 1669 */ 1670 mtx_lock(&bus->eb_mtx); 1671 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1672 && (cdm->pos.cookie.bus == bus) 1673 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1674 && (cdm->pos.cookie.target == target) 1675 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1676 && (cdm->pos.cookie.device != NULL)) { 1677 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1678 target->generation) { 1679 mtx_unlock(&bus->eb_mtx); 1680 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1681 return(0); 1682 } 1683 device = (struct cam_ed *)cdm->pos.cookie.device; 1684 device->refcount++; 1685 } else 1686 device = NULL; 1687 mtx_unlock(&bus->eb_mtx); 1688 1689 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1690 } 1691 1692 static int 1693 xptedtdevicefunc(struct cam_ed *device, void *arg) 1694 { 1695 struct cam_eb *bus; 1696 struct cam_periph *periph; 1697 struct ccb_dev_match *cdm; 1698 dev_match_ret retval; 1699 1700 cdm = (struct ccb_dev_match *)arg; 1701 bus = device->target->bus; 1702 1703 /* 1704 * If our position is for something deeper in the tree, that means 1705 * that we've already seen this node. So, we keep going down. 1706 */ 1707 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1708 && (cdm->pos.cookie.device == device) 1709 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1710 && (cdm->pos.cookie.periph != NULL)) 1711 retval = DM_RET_DESCEND; 1712 else 1713 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1714 device); 1715 1716 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1717 cdm->status = CAM_DEV_MATCH_ERROR; 1718 return(0); 1719 } 1720 1721 /* 1722 * If the copy flag is set, copy this device out. 1723 */ 1724 if (retval & DM_RET_COPY) { 1725 int spaceleft, j; 1726 1727 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1728 sizeof(struct dev_match_result)); 1729 1730 /* 1731 * If we don't have enough space to put in another 1732 * match result, save our position and tell the 1733 * user there are more devices to check. 1734 */ 1735 if (spaceleft < sizeof(struct dev_match_result)) { 1736 bzero(&cdm->pos, sizeof(cdm->pos)); 1737 cdm->pos.position_type = 1738 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1739 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1740 1741 cdm->pos.cookie.bus = device->target->bus; 1742 cdm->pos.generations[CAM_BUS_GENERATION]= 1743 xsoftc.bus_generation; 1744 cdm->pos.cookie.target = device->target; 1745 cdm->pos.generations[CAM_TARGET_GENERATION] = 1746 device->target->bus->generation; 1747 cdm->pos.cookie.device = device; 1748 cdm->pos.generations[CAM_DEV_GENERATION] = 1749 device->target->generation; 1750 cdm->status = CAM_DEV_MATCH_MORE; 1751 return(0); 1752 } 1753 j = cdm->num_matches; 1754 cdm->num_matches++; 1755 cdm->matches[j].type = DEV_MATCH_DEVICE; 1756 cdm->matches[j].result.device_result.path_id = 1757 device->target->bus->path_id; 1758 cdm->matches[j].result.device_result.target_id = 1759 device->target->target_id; 1760 cdm->matches[j].result.device_result.target_lun = 1761 device->lun_id; 1762 cdm->matches[j].result.device_result.protocol = 1763 device->protocol; 1764 bcopy(&device->inq_data, 1765 &cdm->matches[j].result.device_result.inq_data, 1766 sizeof(struct scsi_inquiry_data)); 1767 bcopy(&device->ident_data, 1768 &cdm->matches[j].result.device_result.ident_data, 1769 sizeof(struct ata_params)); 1770 1771 /* Let the user know whether this device is unconfigured */ 1772 if (device->flags & CAM_DEV_UNCONFIGURED) 1773 cdm->matches[j].result.device_result.flags = 1774 DEV_RESULT_UNCONFIGURED; 1775 else 1776 cdm->matches[j].result.device_result.flags = 1777 DEV_RESULT_NOFLAG; 1778 } 1779 1780 /* 1781 * If the user isn't interested in peripherals, don't descend 1782 * the tree any further. 1783 */ 1784 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1785 return(1); 1786 1787 /* 1788 * If there is a peripheral list generation recorded, make sure 1789 * it hasn't changed. 1790 */ 1791 xpt_lock_buses(); 1792 mtx_lock(&bus->eb_mtx); 1793 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1794 && (cdm->pos.cookie.bus == bus) 1795 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1796 && (cdm->pos.cookie.target == device->target) 1797 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1798 && (cdm->pos.cookie.device == device) 1799 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1800 && (cdm->pos.cookie.periph != NULL)) { 1801 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1802 device->generation) { 1803 mtx_unlock(&bus->eb_mtx); 1804 xpt_unlock_buses(); 1805 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1806 return(0); 1807 } 1808 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1809 periph->refcount++; 1810 } else 1811 periph = NULL; 1812 mtx_unlock(&bus->eb_mtx); 1813 xpt_unlock_buses(); 1814 1815 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1816 } 1817 1818 static int 1819 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1820 { 1821 struct ccb_dev_match *cdm; 1822 dev_match_ret retval; 1823 1824 cdm = (struct ccb_dev_match *)arg; 1825 1826 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1827 1828 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1829 cdm->status = CAM_DEV_MATCH_ERROR; 1830 return(0); 1831 } 1832 1833 /* 1834 * If the copy flag is set, copy this peripheral out. 1835 */ 1836 if (retval & DM_RET_COPY) { 1837 int spaceleft, j; 1838 size_t l; 1839 1840 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1841 sizeof(struct dev_match_result)); 1842 1843 /* 1844 * If we don't have enough space to put in another 1845 * match result, save our position and tell the 1846 * user there are more devices to check. 1847 */ 1848 if (spaceleft < sizeof(struct dev_match_result)) { 1849 bzero(&cdm->pos, sizeof(cdm->pos)); 1850 cdm->pos.position_type = 1851 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1852 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1853 CAM_DEV_POS_PERIPH; 1854 1855 cdm->pos.cookie.bus = periph->path->bus; 1856 cdm->pos.generations[CAM_BUS_GENERATION]= 1857 xsoftc.bus_generation; 1858 cdm->pos.cookie.target = periph->path->target; 1859 cdm->pos.generations[CAM_TARGET_GENERATION] = 1860 periph->path->bus->generation; 1861 cdm->pos.cookie.device = periph->path->device; 1862 cdm->pos.generations[CAM_DEV_GENERATION] = 1863 periph->path->target->generation; 1864 cdm->pos.cookie.periph = periph; 1865 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1866 periph->path->device->generation; 1867 cdm->status = CAM_DEV_MATCH_MORE; 1868 return(0); 1869 } 1870 1871 j = cdm->num_matches; 1872 cdm->num_matches++; 1873 cdm->matches[j].type = DEV_MATCH_PERIPH; 1874 cdm->matches[j].result.periph_result.path_id = 1875 periph->path->bus->path_id; 1876 cdm->matches[j].result.periph_result.target_id = 1877 periph->path->target->target_id; 1878 cdm->matches[j].result.periph_result.target_lun = 1879 periph->path->device->lun_id; 1880 cdm->matches[j].result.periph_result.unit_number = 1881 periph->unit_number; 1882 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 1883 strlcpy(cdm->matches[j].result.periph_result.periph_name, 1884 periph->periph_name, l); 1885 } 1886 1887 return(1); 1888 } 1889 1890 static int 1891 xptedtmatch(struct ccb_dev_match *cdm) 1892 { 1893 struct cam_eb *bus; 1894 int ret; 1895 1896 cdm->num_matches = 0; 1897 1898 /* 1899 * Check the bus list generation. If it has changed, the user 1900 * needs to reset everything and start over. 1901 */ 1902 xpt_lock_buses(); 1903 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1904 && (cdm->pos.cookie.bus != NULL)) { 1905 if (cdm->pos.generations[CAM_BUS_GENERATION] != 1906 xsoftc.bus_generation) { 1907 xpt_unlock_buses(); 1908 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1909 return(0); 1910 } 1911 bus = (struct cam_eb *)cdm->pos.cookie.bus; 1912 bus->refcount++; 1913 } else 1914 bus = NULL; 1915 xpt_unlock_buses(); 1916 1917 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 1918 1919 /* 1920 * If we get back 0, that means that we had to stop before fully 1921 * traversing the EDT. It also means that one of the subroutines 1922 * has set the status field to the proper value. If we get back 1, 1923 * we've fully traversed the EDT and copied out any matching entries. 1924 */ 1925 if (ret == 1) 1926 cdm->status = CAM_DEV_MATCH_LAST; 1927 1928 return(ret); 1929 } 1930 1931 static int 1932 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1933 { 1934 struct cam_periph *periph; 1935 struct ccb_dev_match *cdm; 1936 1937 cdm = (struct ccb_dev_match *)arg; 1938 1939 xpt_lock_buses(); 1940 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1941 && (cdm->pos.cookie.pdrv == pdrv) 1942 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1943 && (cdm->pos.cookie.periph != NULL)) { 1944 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1945 (*pdrv)->generation) { 1946 xpt_unlock_buses(); 1947 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1948 return(0); 1949 } 1950 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1951 periph->refcount++; 1952 } else 1953 periph = NULL; 1954 xpt_unlock_buses(); 1955 1956 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 1957 } 1958 1959 static int 1960 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1961 { 1962 struct ccb_dev_match *cdm; 1963 dev_match_ret retval; 1964 1965 cdm = (struct ccb_dev_match *)arg; 1966 1967 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1968 1969 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1970 cdm->status = CAM_DEV_MATCH_ERROR; 1971 return(0); 1972 } 1973 1974 /* 1975 * If the copy flag is set, copy this peripheral out. 1976 */ 1977 if (retval & DM_RET_COPY) { 1978 int spaceleft, j; 1979 size_t l; 1980 1981 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1982 sizeof(struct dev_match_result)); 1983 1984 /* 1985 * If we don't have enough space to put in another 1986 * match result, save our position and tell the 1987 * user there are more devices to check. 1988 */ 1989 if (spaceleft < sizeof(struct dev_match_result)) { 1990 struct periph_driver **pdrv; 1991 1992 pdrv = NULL; 1993 bzero(&cdm->pos, sizeof(cdm->pos)); 1994 cdm->pos.position_type = 1995 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1996 CAM_DEV_POS_PERIPH; 1997 1998 /* 1999 * This may look a bit non-sensical, but it is 2000 * actually quite logical. There are very few 2001 * peripheral drivers, and bloating every peripheral 2002 * structure with a pointer back to its parent 2003 * peripheral driver linker set entry would cost 2004 * more in the long run than doing this quick lookup. 2005 */ 2006 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2007 if (strcmp((*pdrv)->driver_name, 2008 periph->periph_name) == 0) 2009 break; 2010 } 2011 2012 if (*pdrv == NULL) { 2013 cdm->status = CAM_DEV_MATCH_ERROR; 2014 return(0); 2015 } 2016 2017 cdm->pos.cookie.pdrv = pdrv; 2018 /* 2019 * The periph generation slot does double duty, as 2020 * does the periph pointer slot. They are used for 2021 * both edt and pdrv lookups and positioning. 2022 */ 2023 cdm->pos.cookie.periph = periph; 2024 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2025 (*pdrv)->generation; 2026 cdm->status = CAM_DEV_MATCH_MORE; 2027 return(0); 2028 } 2029 2030 j = cdm->num_matches; 2031 cdm->num_matches++; 2032 cdm->matches[j].type = DEV_MATCH_PERIPH; 2033 cdm->matches[j].result.periph_result.path_id = 2034 periph->path->bus->path_id; 2035 2036 /* 2037 * The transport layer peripheral doesn't have a target or 2038 * lun. 2039 */ 2040 if (periph->path->target) 2041 cdm->matches[j].result.periph_result.target_id = 2042 periph->path->target->target_id; 2043 else 2044 cdm->matches[j].result.periph_result.target_id = 2045 CAM_TARGET_WILDCARD; 2046 2047 if (periph->path->device) 2048 cdm->matches[j].result.periph_result.target_lun = 2049 periph->path->device->lun_id; 2050 else 2051 cdm->matches[j].result.periph_result.target_lun = 2052 CAM_LUN_WILDCARD; 2053 2054 cdm->matches[j].result.periph_result.unit_number = 2055 periph->unit_number; 2056 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2057 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2058 periph->periph_name, l); 2059 } 2060 2061 return(1); 2062 } 2063 2064 static int 2065 xptperiphlistmatch(struct ccb_dev_match *cdm) 2066 { 2067 int ret; 2068 2069 cdm->num_matches = 0; 2070 2071 /* 2072 * At this point in the edt traversal function, we check the bus 2073 * list generation to make sure that no busses have been added or 2074 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2075 * For the peripheral driver list traversal function, however, we 2076 * don't have to worry about new peripheral driver types coming or 2077 * going; they're in a linker set, and therefore can't change 2078 * without a recompile. 2079 */ 2080 2081 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2082 && (cdm->pos.cookie.pdrv != NULL)) 2083 ret = xptpdrvtraverse( 2084 (struct periph_driver **)cdm->pos.cookie.pdrv, 2085 xptplistpdrvfunc, cdm); 2086 else 2087 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2088 2089 /* 2090 * If we get back 0, that means that we had to stop before fully 2091 * traversing the peripheral driver tree. It also means that one of 2092 * the subroutines has set the status field to the proper value. If 2093 * we get back 1, we've fully traversed the EDT and copied out any 2094 * matching entries. 2095 */ 2096 if (ret == 1) 2097 cdm->status = CAM_DEV_MATCH_LAST; 2098 2099 return(ret); 2100 } 2101 2102 static int 2103 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2104 { 2105 struct cam_eb *bus, *next_bus; 2106 int retval; 2107 2108 retval = 1; 2109 if (start_bus) 2110 bus = start_bus; 2111 else { 2112 xpt_lock_buses(); 2113 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2114 if (bus == NULL) { 2115 xpt_unlock_buses(); 2116 return (retval); 2117 } 2118 bus->refcount++; 2119 xpt_unlock_buses(); 2120 } 2121 for (; bus != NULL; bus = next_bus) { 2122 retval = tr_func(bus, arg); 2123 if (retval == 0) { 2124 xpt_release_bus(bus); 2125 break; 2126 } 2127 xpt_lock_buses(); 2128 next_bus = TAILQ_NEXT(bus, links); 2129 if (next_bus) 2130 next_bus->refcount++; 2131 xpt_unlock_buses(); 2132 xpt_release_bus(bus); 2133 } 2134 return(retval); 2135 } 2136 2137 static int 2138 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2139 xpt_targetfunc_t *tr_func, void *arg) 2140 { 2141 struct cam_et *target, *next_target; 2142 int retval; 2143 2144 retval = 1; 2145 if (start_target) 2146 target = start_target; 2147 else { 2148 mtx_lock(&bus->eb_mtx); 2149 target = TAILQ_FIRST(&bus->et_entries); 2150 if (target == NULL) { 2151 mtx_unlock(&bus->eb_mtx); 2152 return (retval); 2153 } 2154 target->refcount++; 2155 mtx_unlock(&bus->eb_mtx); 2156 } 2157 for (; target != NULL; target = next_target) { 2158 retval = tr_func(target, arg); 2159 if (retval == 0) { 2160 xpt_release_target(target); 2161 break; 2162 } 2163 mtx_lock(&bus->eb_mtx); 2164 next_target = TAILQ_NEXT(target, links); 2165 if (next_target) 2166 next_target->refcount++; 2167 mtx_unlock(&bus->eb_mtx); 2168 xpt_release_target(target); 2169 } 2170 return(retval); 2171 } 2172 2173 static int 2174 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2175 xpt_devicefunc_t *tr_func, void *arg) 2176 { 2177 struct cam_eb *bus; 2178 struct cam_ed *device, *next_device; 2179 int retval; 2180 2181 retval = 1; 2182 bus = target->bus; 2183 if (start_device) 2184 device = start_device; 2185 else { 2186 mtx_lock(&bus->eb_mtx); 2187 device = TAILQ_FIRST(&target->ed_entries); 2188 if (device == NULL) { 2189 mtx_unlock(&bus->eb_mtx); 2190 return (retval); 2191 } 2192 device->refcount++; 2193 mtx_unlock(&bus->eb_mtx); 2194 } 2195 for (; device != NULL; device = next_device) { 2196 mtx_lock(&device->device_mtx); 2197 retval = tr_func(device, arg); 2198 mtx_unlock(&device->device_mtx); 2199 if (retval == 0) { 2200 xpt_release_device(device); 2201 break; 2202 } 2203 mtx_lock(&bus->eb_mtx); 2204 next_device = TAILQ_NEXT(device, links); 2205 if (next_device) 2206 next_device->refcount++; 2207 mtx_unlock(&bus->eb_mtx); 2208 xpt_release_device(device); 2209 } 2210 return(retval); 2211 } 2212 2213 static int 2214 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2215 xpt_periphfunc_t *tr_func, void *arg) 2216 { 2217 struct cam_eb *bus; 2218 struct cam_periph *periph, *next_periph; 2219 int retval; 2220 2221 retval = 1; 2222 2223 bus = device->target->bus; 2224 if (start_periph) 2225 periph = start_periph; 2226 else { 2227 xpt_lock_buses(); 2228 mtx_lock(&bus->eb_mtx); 2229 periph = SLIST_FIRST(&device->periphs); 2230 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2231 periph = SLIST_NEXT(periph, periph_links); 2232 if (periph == NULL) { 2233 mtx_unlock(&bus->eb_mtx); 2234 xpt_unlock_buses(); 2235 return (retval); 2236 } 2237 periph->refcount++; 2238 mtx_unlock(&bus->eb_mtx); 2239 xpt_unlock_buses(); 2240 } 2241 for (; periph != NULL; periph = next_periph) { 2242 retval = tr_func(periph, arg); 2243 if (retval == 0) { 2244 cam_periph_release_locked(periph); 2245 break; 2246 } 2247 xpt_lock_buses(); 2248 mtx_lock(&bus->eb_mtx); 2249 next_periph = SLIST_NEXT(periph, periph_links); 2250 while (next_periph != NULL && 2251 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2252 next_periph = SLIST_NEXT(next_periph, periph_links); 2253 if (next_periph) 2254 next_periph->refcount++; 2255 mtx_unlock(&bus->eb_mtx); 2256 xpt_unlock_buses(); 2257 cam_periph_release_locked(periph); 2258 } 2259 return(retval); 2260 } 2261 2262 static int 2263 xptpdrvtraverse(struct periph_driver **start_pdrv, 2264 xpt_pdrvfunc_t *tr_func, void *arg) 2265 { 2266 struct periph_driver **pdrv; 2267 int retval; 2268 2269 retval = 1; 2270 2271 /* 2272 * We don't traverse the peripheral driver list like we do the 2273 * other lists, because it is a linker set, and therefore cannot be 2274 * changed during runtime. If the peripheral driver list is ever 2275 * re-done to be something other than a linker set (i.e. it can 2276 * change while the system is running), the list traversal should 2277 * be modified to work like the other traversal functions. 2278 */ 2279 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2280 *pdrv != NULL; pdrv++) { 2281 retval = tr_func(pdrv, arg); 2282 2283 if (retval == 0) 2284 return(retval); 2285 } 2286 2287 return(retval); 2288 } 2289 2290 static int 2291 xptpdperiphtraverse(struct periph_driver **pdrv, 2292 struct cam_periph *start_periph, 2293 xpt_periphfunc_t *tr_func, void *arg) 2294 { 2295 struct cam_periph *periph, *next_periph; 2296 int retval; 2297 2298 retval = 1; 2299 2300 if (start_periph) 2301 periph = start_periph; 2302 else { 2303 xpt_lock_buses(); 2304 periph = TAILQ_FIRST(&(*pdrv)->units); 2305 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2306 periph = TAILQ_NEXT(periph, unit_links); 2307 if (periph == NULL) { 2308 xpt_unlock_buses(); 2309 return (retval); 2310 } 2311 periph->refcount++; 2312 xpt_unlock_buses(); 2313 } 2314 for (; periph != NULL; periph = next_periph) { 2315 cam_periph_lock(periph); 2316 retval = tr_func(periph, arg); 2317 cam_periph_unlock(periph); 2318 if (retval == 0) { 2319 cam_periph_release(periph); 2320 break; 2321 } 2322 xpt_lock_buses(); 2323 next_periph = TAILQ_NEXT(periph, unit_links); 2324 while (next_periph != NULL && 2325 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2326 next_periph = TAILQ_NEXT(next_periph, unit_links); 2327 if (next_periph) 2328 next_periph->refcount++; 2329 xpt_unlock_buses(); 2330 cam_periph_release(periph); 2331 } 2332 return(retval); 2333 } 2334 2335 static int 2336 xptdefbusfunc(struct cam_eb *bus, void *arg) 2337 { 2338 struct xpt_traverse_config *tr_config; 2339 2340 tr_config = (struct xpt_traverse_config *)arg; 2341 2342 if (tr_config->depth == XPT_DEPTH_BUS) { 2343 xpt_busfunc_t *tr_func; 2344 2345 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2346 2347 return(tr_func(bus, tr_config->tr_arg)); 2348 } else 2349 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2350 } 2351 2352 static int 2353 xptdeftargetfunc(struct cam_et *target, void *arg) 2354 { 2355 struct xpt_traverse_config *tr_config; 2356 2357 tr_config = (struct xpt_traverse_config *)arg; 2358 2359 if (tr_config->depth == XPT_DEPTH_TARGET) { 2360 xpt_targetfunc_t *tr_func; 2361 2362 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2363 2364 return(tr_func(target, tr_config->tr_arg)); 2365 } else 2366 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2367 } 2368 2369 static int 2370 xptdefdevicefunc(struct cam_ed *device, void *arg) 2371 { 2372 struct xpt_traverse_config *tr_config; 2373 2374 tr_config = (struct xpt_traverse_config *)arg; 2375 2376 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2377 xpt_devicefunc_t *tr_func; 2378 2379 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2380 2381 return(tr_func(device, tr_config->tr_arg)); 2382 } else 2383 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2384 } 2385 2386 static int 2387 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2388 { 2389 struct xpt_traverse_config *tr_config; 2390 xpt_periphfunc_t *tr_func; 2391 2392 tr_config = (struct xpt_traverse_config *)arg; 2393 2394 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2395 2396 /* 2397 * Unlike the other default functions, we don't check for depth 2398 * here. The peripheral driver level is the last level in the EDT, 2399 * so if we're here, we should execute the function in question. 2400 */ 2401 return(tr_func(periph, tr_config->tr_arg)); 2402 } 2403 2404 /* 2405 * Execute the given function for every bus in the EDT. 2406 */ 2407 static int 2408 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2409 { 2410 struct xpt_traverse_config tr_config; 2411 2412 tr_config.depth = XPT_DEPTH_BUS; 2413 tr_config.tr_func = tr_func; 2414 tr_config.tr_arg = arg; 2415 2416 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2417 } 2418 2419 /* 2420 * Execute the given function for every device in the EDT. 2421 */ 2422 static int 2423 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2424 { 2425 struct xpt_traverse_config tr_config; 2426 2427 tr_config.depth = XPT_DEPTH_DEVICE; 2428 tr_config.tr_func = tr_func; 2429 tr_config.tr_arg = arg; 2430 2431 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2432 } 2433 2434 static int 2435 xptsetasyncfunc(struct cam_ed *device, void *arg) 2436 { 2437 struct cam_path path; 2438 struct ccb_getdev cgd; 2439 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2440 2441 /* 2442 * Don't report unconfigured devices (Wildcard devs, 2443 * devices only for target mode, device instances 2444 * that have been invalidated but are waiting for 2445 * their last reference count to be released). 2446 */ 2447 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2448 return (1); 2449 2450 xpt_compile_path(&path, 2451 NULL, 2452 device->target->bus->path_id, 2453 device->target->target_id, 2454 device->lun_id); 2455 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2456 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2457 xpt_action((union ccb *)&cgd); 2458 csa->callback(csa->callback_arg, 2459 AC_FOUND_DEVICE, 2460 &path, &cgd); 2461 xpt_release_path(&path); 2462 2463 return(1); 2464 } 2465 2466 static int 2467 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2468 { 2469 struct cam_path path; 2470 struct ccb_pathinq cpi; 2471 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2472 2473 xpt_compile_path(&path, /*periph*/NULL, 2474 bus->path_id, 2475 CAM_TARGET_WILDCARD, 2476 CAM_LUN_WILDCARD); 2477 xpt_path_lock(&path); 2478 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2479 cpi.ccb_h.func_code = XPT_PATH_INQ; 2480 xpt_action((union ccb *)&cpi); 2481 csa->callback(csa->callback_arg, 2482 AC_PATH_REGISTERED, 2483 &path, &cpi); 2484 xpt_path_unlock(&path); 2485 xpt_release_path(&path); 2486 2487 return(1); 2488 } 2489 2490 void 2491 xpt_action(union ccb *start_ccb) 2492 { 2493 2494 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, 2495 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code, 2496 xpt_action_name(start_ccb->ccb_h.func_code))); 2497 2498 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2499 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb); 2500 } 2501 2502 void 2503 xpt_action_default(union ccb *start_ccb) 2504 { 2505 struct cam_path *path; 2506 struct cam_sim *sim; 2507 struct mtx *mtx; 2508 2509 path = start_ccb->ccb_h.path; 2510 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2511 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code, 2512 xpt_action_name(start_ccb->ccb_h.func_code))); 2513 2514 switch (start_ccb->ccb_h.func_code) { 2515 case XPT_SCSI_IO: 2516 { 2517 struct cam_ed *device; 2518 2519 /* 2520 * For the sake of compatibility with SCSI-1 2521 * devices that may not understand the identify 2522 * message, we include lun information in the 2523 * second byte of all commands. SCSI-1 specifies 2524 * that luns are a 3 bit value and reserves only 3 2525 * bits for lun information in the CDB. Later 2526 * revisions of the SCSI spec allow for more than 8 2527 * luns, but have deprecated lun information in the 2528 * CDB. So, if the lun won't fit, we must omit. 2529 * 2530 * Also be aware that during initial probing for devices, 2531 * the inquiry information is unknown but initialized to 0. 2532 * This means that this code will be exercised while probing 2533 * devices with an ANSI revision greater than 2. 2534 */ 2535 device = path->device; 2536 if (device->protocol_version <= SCSI_REV_2 2537 && start_ccb->ccb_h.target_lun < 8 2538 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2539 2540 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2541 start_ccb->ccb_h.target_lun << 5; 2542 } 2543 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2544 } 2545 /* FALLTHROUGH */ 2546 case XPT_TARGET_IO: 2547 case XPT_CONT_TARGET_IO: 2548 start_ccb->csio.sense_resid = 0; 2549 start_ccb->csio.resid = 0; 2550 /* FALLTHROUGH */ 2551 case XPT_ATA_IO: 2552 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2553 start_ccb->ataio.resid = 0; 2554 /* FALLTHROUGH */ 2555 case XPT_NVME_IO: 2556 /* FALLTHROUGH */ 2557 case XPT_NVME_ADMIN: 2558 /* FALLTHROUGH */ 2559 case XPT_RESET_DEV: 2560 case XPT_ENG_EXEC: 2561 case XPT_SMP_IO: 2562 { 2563 struct cam_devq *devq; 2564 2565 devq = path->bus->sim->devq; 2566 mtx_lock(&devq->send_mtx); 2567 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2568 if (xpt_schedule_devq(devq, path->device) != 0) 2569 xpt_run_devq(devq); 2570 mtx_unlock(&devq->send_mtx); 2571 break; 2572 } 2573 case XPT_CALC_GEOMETRY: 2574 /* Filter out garbage */ 2575 if (start_ccb->ccg.block_size == 0 2576 || start_ccb->ccg.volume_size == 0) { 2577 start_ccb->ccg.cylinders = 0; 2578 start_ccb->ccg.heads = 0; 2579 start_ccb->ccg.secs_per_track = 0; 2580 start_ccb->ccb_h.status = CAM_REQ_CMP; 2581 break; 2582 } 2583 #if defined(PC98) || defined(__sparc64__) 2584 /* 2585 * In a PC-98 system, geometry translation depens on 2586 * the "real" device geometry obtained from mode page 4. 2587 * SCSI geometry translation is performed in the 2588 * initialization routine of the SCSI BIOS and the result 2589 * stored in host memory. If the translation is available 2590 * in host memory, use it. If not, rely on the default 2591 * translation the device driver performs. 2592 * For sparc64, we may need adjust the geometry of large 2593 * disks in order to fit the limitations of the 16-bit 2594 * fields of the VTOC8 disk label. 2595 */ 2596 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2597 start_ccb->ccb_h.status = CAM_REQ_CMP; 2598 break; 2599 } 2600 #endif 2601 goto call_sim; 2602 case XPT_ABORT: 2603 { 2604 union ccb* abort_ccb; 2605 2606 abort_ccb = start_ccb->cab.abort_ccb; 2607 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2608 struct cam_ed *device; 2609 struct cam_devq *devq; 2610 2611 device = abort_ccb->ccb_h.path->device; 2612 devq = device->sim->devq; 2613 2614 mtx_lock(&devq->send_mtx); 2615 if (abort_ccb->ccb_h.pinfo.index > 0) { 2616 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb); 2617 abort_ccb->ccb_h.status = 2618 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2619 xpt_freeze_devq_device(device, 1); 2620 mtx_unlock(&devq->send_mtx); 2621 xpt_done(abort_ccb); 2622 start_ccb->ccb_h.status = CAM_REQ_CMP; 2623 break; 2624 } 2625 mtx_unlock(&devq->send_mtx); 2626 2627 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2628 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2629 /* 2630 * We've caught this ccb en route to 2631 * the SIM. Flag it for abort and the 2632 * SIM will do so just before starting 2633 * real work on the CCB. 2634 */ 2635 abort_ccb->ccb_h.status = 2636 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2637 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2638 start_ccb->ccb_h.status = CAM_REQ_CMP; 2639 break; 2640 } 2641 } 2642 if (XPT_FC_IS_QUEUED(abort_ccb) 2643 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2644 /* 2645 * It's already completed but waiting 2646 * for our SWI to get to it. 2647 */ 2648 start_ccb->ccb_h.status = CAM_UA_ABORT; 2649 break; 2650 } 2651 /* 2652 * If we weren't able to take care of the abort request 2653 * in the XPT, pass the request down to the SIM for processing. 2654 */ 2655 } 2656 /* FALLTHROUGH */ 2657 case XPT_ACCEPT_TARGET_IO: 2658 case XPT_EN_LUN: 2659 case XPT_IMMED_NOTIFY: 2660 case XPT_NOTIFY_ACK: 2661 case XPT_RESET_BUS: 2662 case XPT_IMMEDIATE_NOTIFY: 2663 case XPT_NOTIFY_ACKNOWLEDGE: 2664 case XPT_GET_SIM_KNOB_OLD: 2665 case XPT_GET_SIM_KNOB: 2666 case XPT_SET_SIM_KNOB: 2667 case XPT_GET_TRAN_SETTINGS: 2668 case XPT_SET_TRAN_SETTINGS: 2669 case XPT_PATH_INQ: 2670 call_sim: 2671 sim = path->bus->sim; 2672 mtx = sim->mtx; 2673 if (mtx && !mtx_owned(mtx)) 2674 mtx_lock(mtx); 2675 else 2676 mtx = NULL; 2677 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2678 ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code)); 2679 (*(sim->sim_action))(sim, start_ccb); 2680 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2681 ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status)); 2682 if (mtx) 2683 mtx_unlock(mtx); 2684 break; 2685 case XPT_PATH_STATS: 2686 start_ccb->cpis.last_reset = path->bus->last_reset; 2687 start_ccb->ccb_h.status = CAM_REQ_CMP; 2688 break; 2689 case XPT_GDEV_TYPE: 2690 { 2691 struct cam_ed *dev; 2692 2693 dev = path->device; 2694 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2695 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2696 } else { 2697 struct ccb_getdev *cgd; 2698 2699 cgd = &start_ccb->cgd; 2700 cgd->protocol = dev->protocol; 2701 cgd->inq_data = dev->inq_data; 2702 cgd->ident_data = dev->ident_data; 2703 cgd->inq_flags = dev->inq_flags; 2704 cgd->ccb_h.status = CAM_REQ_CMP; 2705 cgd->serial_num_len = dev->serial_num_len; 2706 if ((dev->serial_num_len > 0) 2707 && (dev->serial_num != NULL)) 2708 bcopy(dev->serial_num, cgd->serial_num, 2709 dev->serial_num_len); 2710 } 2711 break; 2712 } 2713 case XPT_GDEV_STATS: 2714 { 2715 struct ccb_getdevstats *cgds = &start_ccb->cgds; 2716 struct cam_ed *dev = path->device; 2717 struct cam_eb *bus = path->bus; 2718 struct cam_et *tar = path->target; 2719 struct cam_devq *devq = bus->sim->devq; 2720 2721 mtx_lock(&devq->send_mtx); 2722 cgds->dev_openings = dev->ccbq.dev_openings; 2723 cgds->dev_active = dev->ccbq.dev_active; 2724 cgds->allocated = dev->ccbq.allocated; 2725 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2726 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued; 2727 cgds->last_reset = tar->last_reset; 2728 cgds->maxtags = dev->maxtags; 2729 cgds->mintags = dev->mintags; 2730 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2731 cgds->last_reset = bus->last_reset; 2732 mtx_unlock(&devq->send_mtx); 2733 cgds->ccb_h.status = CAM_REQ_CMP; 2734 break; 2735 } 2736 case XPT_GDEVLIST: 2737 { 2738 struct cam_periph *nperiph; 2739 struct periph_list *periph_head; 2740 struct ccb_getdevlist *cgdl; 2741 u_int i; 2742 struct cam_ed *device; 2743 int found; 2744 2745 2746 found = 0; 2747 2748 /* 2749 * Don't want anyone mucking with our data. 2750 */ 2751 device = path->device; 2752 periph_head = &device->periphs; 2753 cgdl = &start_ccb->cgdl; 2754 2755 /* 2756 * Check and see if the list has changed since the user 2757 * last requested a list member. If so, tell them that the 2758 * list has changed, and therefore they need to start over 2759 * from the beginning. 2760 */ 2761 if ((cgdl->index != 0) && 2762 (cgdl->generation != device->generation)) { 2763 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2764 break; 2765 } 2766 2767 /* 2768 * Traverse the list of peripherals and attempt to find 2769 * the requested peripheral. 2770 */ 2771 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2772 (nperiph != NULL) && (i <= cgdl->index); 2773 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2774 if (i == cgdl->index) { 2775 strlcpy(cgdl->periph_name, 2776 nperiph->periph_name, 2777 sizeof(cgdl->periph_name)); 2778 cgdl->unit_number = nperiph->unit_number; 2779 found = 1; 2780 } 2781 } 2782 if (found == 0) { 2783 cgdl->status = CAM_GDEVLIST_ERROR; 2784 break; 2785 } 2786 2787 if (nperiph == NULL) 2788 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2789 else 2790 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2791 2792 cgdl->index++; 2793 cgdl->generation = device->generation; 2794 2795 cgdl->ccb_h.status = CAM_REQ_CMP; 2796 break; 2797 } 2798 case XPT_DEV_MATCH: 2799 { 2800 dev_pos_type position_type; 2801 struct ccb_dev_match *cdm; 2802 2803 cdm = &start_ccb->cdm; 2804 2805 /* 2806 * There are two ways of getting at information in the EDT. 2807 * The first way is via the primary EDT tree. It starts 2808 * with a list of busses, then a list of targets on a bus, 2809 * then devices/luns on a target, and then peripherals on a 2810 * device/lun. The "other" way is by the peripheral driver 2811 * lists. The peripheral driver lists are organized by 2812 * peripheral driver. (obviously) So it makes sense to 2813 * use the peripheral driver list if the user is looking 2814 * for something like "da1", or all "da" devices. If the 2815 * user is looking for something on a particular bus/target 2816 * or lun, it's generally better to go through the EDT tree. 2817 */ 2818 2819 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2820 position_type = cdm->pos.position_type; 2821 else { 2822 u_int i; 2823 2824 position_type = CAM_DEV_POS_NONE; 2825 2826 for (i = 0; i < cdm->num_patterns; i++) { 2827 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2828 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2829 position_type = CAM_DEV_POS_EDT; 2830 break; 2831 } 2832 } 2833 2834 if (cdm->num_patterns == 0) 2835 position_type = CAM_DEV_POS_EDT; 2836 else if (position_type == CAM_DEV_POS_NONE) 2837 position_type = CAM_DEV_POS_PDRV; 2838 } 2839 2840 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2841 case CAM_DEV_POS_EDT: 2842 xptedtmatch(cdm); 2843 break; 2844 case CAM_DEV_POS_PDRV: 2845 xptperiphlistmatch(cdm); 2846 break; 2847 default: 2848 cdm->status = CAM_DEV_MATCH_ERROR; 2849 break; 2850 } 2851 2852 if (cdm->status == CAM_DEV_MATCH_ERROR) 2853 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2854 else 2855 start_ccb->ccb_h.status = CAM_REQ_CMP; 2856 2857 break; 2858 } 2859 case XPT_SASYNC_CB: 2860 { 2861 struct ccb_setasync *csa; 2862 struct async_node *cur_entry; 2863 struct async_list *async_head; 2864 u_int32_t added; 2865 2866 csa = &start_ccb->csa; 2867 added = csa->event_enable; 2868 async_head = &path->device->asyncs; 2869 2870 /* 2871 * If there is already an entry for us, simply 2872 * update it. 2873 */ 2874 cur_entry = SLIST_FIRST(async_head); 2875 while (cur_entry != NULL) { 2876 if ((cur_entry->callback_arg == csa->callback_arg) 2877 && (cur_entry->callback == csa->callback)) 2878 break; 2879 cur_entry = SLIST_NEXT(cur_entry, links); 2880 } 2881 2882 if (cur_entry != NULL) { 2883 /* 2884 * If the request has no flags set, 2885 * remove the entry. 2886 */ 2887 added &= ~cur_entry->event_enable; 2888 if (csa->event_enable == 0) { 2889 SLIST_REMOVE(async_head, cur_entry, 2890 async_node, links); 2891 xpt_release_device(path->device); 2892 free(cur_entry, M_CAMXPT); 2893 } else { 2894 cur_entry->event_enable = csa->event_enable; 2895 } 2896 csa->event_enable = added; 2897 } else { 2898 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2899 M_NOWAIT); 2900 if (cur_entry == NULL) { 2901 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2902 break; 2903 } 2904 cur_entry->event_enable = csa->event_enable; 2905 cur_entry->event_lock = (path->bus->sim->mtx && 2906 mtx_owned(path->bus->sim->mtx)) ? 1 : 0; 2907 cur_entry->callback_arg = csa->callback_arg; 2908 cur_entry->callback = csa->callback; 2909 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2910 xpt_acquire_device(path->device); 2911 } 2912 start_ccb->ccb_h.status = CAM_REQ_CMP; 2913 break; 2914 } 2915 case XPT_REL_SIMQ: 2916 { 2917 struct ccb_relsim *crs; 2918 struct cam_ed *dev; 2919 2920 crs = &start_ccb->crs; 2921 dev = path->device; 2922 if (dev == NULL) { 2923 2924 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2925 break; 2926 } 2927 2928 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2929 2930 /* Don't ever go below one opening */ 2931 if (crs->openings > 0) { 2932 xpt_dev_ccbq_resize(path, crs->openings); 2933 if (bootverbose) { 2934 xpt_print(path, 2935 "number of openings is now %d\n", 2936 crs->openings); 2937 } 2938 } 2939 } 2940 2941 mtx_lock(&dev->sim->devq->send_mtx); 2942 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2943 2944 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2945 2946 /* 2947 * Just extend the old timeout and decrement 2948 * the freeze count so that a single timeout 2949 * is sufficient for releasing the queue. 2950 */ 2951 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2952 callout_stop(&dev->callout); 2953 } else { 2954 2955 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2956 } 2957 2958 callout_reset_sbt(&dev->callout, 2959 SBT_1MS * crs->release_timeout, 0, 2960 xpt_release_devq_timeout, dev, 0); 2961 2962 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2963 2964 } 2965 2966 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2967 2968 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2969 /* 2970 * Decrement the freeze count so that a single 2971 * completion is still sufficient to unfreeze 2972 * the queue. 2973 */ 2974 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2975 } else { 2976 2977 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2978 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2979 } 2980 } 2981 2982 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2983 2984 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2985 || (dev->ccbq.dev_active == 0)) { 2986 2987 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2988 } else { 2989 2990 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2991 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2992 } 2993 } 2994 mtx_unlock(&dev->sim->devq->send_mtx); 2995 2996 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 2997 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 2998 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 2999 start_ccb->ccb_h.status = CAM_REQ_CMP; 3000 break; 3001 } 3002 case XPT_DEBUG: { 3003 struct cam_path *oldpath; 3004 3005 /* Check that all request bits are supported. */ 3006 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 3007 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3008 break; 3009 } 3010 3011 cam_dflags = CAM_DEBUG_NONE; 3012 if (cam_dpath != NULL) { 3013 oldpath = cam_dpath; 3014 cam_dpath = NULL; 3015 xpt_free_path(oldpath); 3016 } 3017 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 3018 if (xpt_create_path(&cam_dpath, NULL, 3019 start_ccb->ccb_h.path_id, 3020 start_ccb->ccb_h.target_id, 3021 start_ccb->ccb_h.target_lun) != 3022 CAM_REQ_CMP) { 3023 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3024 } else { 3025 cam_dflags = start_ccb->cdbg.flags; 3026 start_ccb->ccb_h.status = CAM_REQ_CMP; 3027 xpt_print(cam_dpath, "debugging flags now %x\n", 3028 cam_dflags); 3029 } 3030 } else 3031 start_ccb->ccb_h.status = CAM_REQ_CMP; 3032 break; 3033 } 3034 case XPT_NOOP: 3035 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3036 xpt_freeze_devq(path, 1); 3037 start_ccb->ccb_h.status = CAM_REQ_CMP; 3038 break; 3039 case XPT_REPROBE_LUN: 3040 xpt_async(AC_INQ_CHANGED, path, NULL); 3041 start_ccb->ccb_h.status = CAM_REQ_CMP; 3042 xpt_done(start_ccb); 3043 break; 3044 default: 3045 case XPT_SDEV_TYPE: 3046 case XPT_TERM_IO: 3047 case XPT_ENG_INQ: 3048 /* XXX Implement */ 3049 xpt_print_path(start_ccb->ccb_h.path); 3050 printf("%s: CCB type %#x %s not supported\n", __func__, 3051 start_ccb->ccb_h.func_code, 3052 xpt_action_name(start_ccb->ccb_h.func_code)); 3053 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3054 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3055 xpt_done(start_ccb); 3056 } 3057 break; 3058 } 3059 CAM_DEBUG(path, CAM_DEBUG_TRACE, 3060 ("xpt_action_default: func= %#x %s status %#x\n", 3061 start_ccb->ccb_h.func_code, 3062 xpt_action_name(start_ccb->ccb_h.func_code), 3063 start_ccb->ccb_h.status)); 3064 } 3065 3066 void 3067 xpt_polled_action(union ccb *start_ccb) 3068 { 3069 u_int32_t timeout; 3070 struct cam_sim *sim; 3071 struct cam_devq *devq; 3072 struct cam_ed *dev; 3073 struct mtx *mtx; 3074 3075 timeout = start_ccb->ccb_h.timeout * 10; 3076 sim = start_ccb->ccb_h.path->bus->sim; 3077 devq = sim->devq; 3078 mtx = sim->mtx; 3079 dev = start_ccb->ccb_h.path->device; 3080 3081 mtx_unlock(&dev->device_mtx); 3082 3083 /* 3084 * Steal an opening so that no other queued requests 3085 * can get it before us while we simulate interrupts. 3086 */ 3087 mtx_lock(&devq->send_mtx); 3088 dev->ccbq.dev_openings--; 3089 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3090 (--timeout > 0)) { 3091 mtx_unlock(&devq->send_mtx); 3092 DELAY(100); 3093 if (mtx) 3094 mtx_lock(mtx); 3095 (*(sim->sim_poll))(sim); 3096 if (mtx) 3097 mtx_unlock(mtx); 3098 camisr_runqueue(); 3099 mtx_lock(&devq->send_mtx); 3100 } 3101 dev->ccbq.dev_openings++; 3102 mtx_unlock(&devq->send_mtx); 3103 3104 if (timeout != 0) { 3105 xpt_action(start_ccb); 3106 while(--timeout > 0) { 3107 if (mtx) 3108 mtx_lock(mtx); 3109 (*(sim->sim_poll))(sim); 3110 if (mtx) 3111 mtx_unlock(mtx); 3112 camisr_runqueue(); 3113 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3114 != CAM_REQ_INPROG) 3115 break; 3116 DELAY(100); 3117 } 3118 if (timeout == 0) { 3119 /* 3120 * XXX Is it worth adding a sim_timeout entry 3121 * point so we can attempt recovery? If 3122 * this is only used for dumps, I don't think 3123 * it is. 3124 */ 3125 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3126 } 3127 } else { 3128 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3129 } 3130 3131 mtx_lock(&dev->device_mtx); 3132 } 3133 3134 /* 3135 * Schedule a peripheral driver to receive a ccb when its 3136 * target device has space for more transactions. 3137 */ 3138 void 3139 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3140 { 3141 3142 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3143 cam_periph_assert(periph, MA_OWNED); 3144 if (new_priority < periph->scheduled_priority) { 3145 periph->scheduled_priority = new_priority; 3146 xpt_run_allocq(periph, 0); 3147 } 3148 } 3149 3150 3151 /* 3152 * Schedule a device to run on a given queue. 3153 * If the device was inserted as a new entry on the queue, 3154 * return 1 meaning the device queue should be run. If we 3155 * were already queued, implying someone else has already 3156 * started the queue, return 0 so the caller doesn't attempt 3157 * to run the queue. 3158 */ 3159 static int 3160 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3161 u_int32_t new_priority) 3162 { 3163 int retval; 3164 u_int32_t old_priority; 3165 3166 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3167 3168 old_priority = pinfo->priority; 3169 3170 /* 3171 * Are we already queued? 3172 */ 3173 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3174 /* Simply reorder based on new priority */ 3175 if (new_priority < old_priority) { 3176 camq_change_priority(queue, pinfo->index, 3177 new_priority); 3178 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3179 ("changed priority to %d\n", 3180 new_priority)); 3181 retval = 1; 3182 } else 3183 retval = 0; 3184 } else { 3185 /* New entry on the queue */ 3186 if (new_priority < old_priority) 3187 pinfo->priority = new_priority; 3188 3189 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3190 ("Inserting onto queue\n")); 3191 pinfo->generation = ++queue->generation; 3192 camq_insert(queue, pinfo); 3193 retval = 1; 3194 } 3195 return (retval); 3196 } 3197 3198 static void 3199 xpt_run_allocq_task(void *context, int pending) 3200 { 3201 struct cam_periph *periph = context; 3202 3203 cam_periph_lock(periph); 3204 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3205 xpt_run_allocq(periph, 1); 3206 cam_periph_unlock(periph); 3207 cam_periph_release(periph); 3208 } 3209 3210 static void 3211 xpt_run_allocq(struct cam_periph *periph, int sleep) 3212 { 3213 struct cam_ed *device; 3214 union ccb *ccb; 3215 uint32_t prio; 3216 3217 cam_periph_assert(periph, MA_OWNED); 3218 if (periph->periph_allocating) 3219 return; 3220 periph->periph_allocating = 1; 3221 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3222 device = periph->path->device; 3223 ccb = NULL; 3224 restart: 3225 while ((prio = min(periph->scheduled_priority, 3226 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3227 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3228 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3229 3230 if (ccb == NULL && 3231 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3232 if (sleep) { 3233 ccb = xpt_get_ccb(periph); 3234 goto restart; 3235 } 3236 if (periph->flags & CAM_PERIPH_RUN_TASK) 3237 break; 3238 cam_periph_doacquire(periph); 3239 periph->flags |= CAM_PERIPH_RUN_TASK; 3240 taskqueue_enqueue(xsoftc.xpt_taskq, 3241 &periph->periph_run_task); 3242 break; 3243 } 3244 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3245 if (prio == periph->immediate_priority) { 3246 periph->immediate_priority = CAM_PRIORITY_NONE; 3247 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3248 ("waking cam_periph_getccb()\n")); 3249 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3250 periph_links.sle); 3251 wakeup(&periph->ccb_list); 3252 } else { 3253 periph->scheduled_priority = CAM_PRIORITY_NONE; 3254 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3255 ("calling periph_start()\n")); 3256 periph->periph_start(periph, ccb); 3257 } 3258 ccb = NULL; 3259 } 3260 if (ccb != NULL) 3261 xpt_release_ccb(ccb); 3262 periph->periph_allocating = 0; 3263 } 3264 3265 static void 3266 xpt_run_devq(struct cam_devq *devq) 3267 { 3268 struct mtx *mtx; 3269 3270 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3271 3272 devq->send_queue.qfrozen_cnt++; 3273 while ((devq->send_queue.entries > 0) 3274 && (devq->send_openings > 0) 3275 && (devq->send_queue.qfrozen_cnt <= 1)) { 3276 struct cam_ed *device; 3277 union ccb *work_ccb; 3278 struct cam_sim *sim; 3279 struct xpt_proto *proto; 3280 3281 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3282 CAMQ_HEAD); 3283 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3284 ("running device %p\n", device)); 3285 3286 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3287 if (work_ccb == NULL) { 3288 printf("device on run queue with no ccbs???\n"); 3289 continue; 3290 } 3291 3292 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3293 3294 mtx_lock(&xsoftc.xpt_highpower_lock); 3295 if (xsoftc.num_highpower <= 0) { 3296 /* 3297 * We got a high power command, but we 3298 * don't have any available slots. Freeze 3299 * the device queue until we have a slot 3300 * available. 3301 */ 3302 xpt_freeze_devq_device(device, 1); 3303 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3304 highpowerq_entry); 3305 3306 mtx_unlock(&xsoftc.xpt_highpower_lock); 3307 continue; 3308 } else { 3309 /* 3310 * Consume a high power slot while 3311 * this ccb runs. 3312 */ 3313 xsoftc.num_highpower--; 3314 } 3315 mtx_unlock(&xsoftc.xpt_highpower_lock); 3316 } 3317 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3318 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3319 devq->send_openings--; 3320 devq->send_active++; 3321 xpt_schedule_devq(devq, device); 3322 mtx_unlock(&devq->send_mtx); 3323 3324 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3325 /* 3326 * The client wants to freeze the queue 3327 * after this CCB is sent. 3328 */ 3329 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3330 } 3331 3332 /* In Target mode, the peripheral driver knows best... */ 3333 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3334 if ((device->inq_flags & SID_CmdQue) != 0 3335 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3336 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3337 else 3338 /* 3339 * Clear this in case of a retried CCB that 3340 * failed due to a rejected tag. 3341 */ 3342 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3343 } 3344 3345 KASSERT(device == work_ccb->ccb_h.path->device, 3346 ("device (%p) / path->device (%p) mismatch", 3347 device, work_ccb->ccb_h.path->device)); 3348 proto = xpt_proto_find(device->protocol); 3349 if (proto && proto->ops->debug_out) 3350 proto->ops->debug_out(work_ccb); 3351 3352 /* 3353 * Device queues can be shared among multiple SIM instances 3354 * that reside on different busses. Use the SIM from the 3355 * queued device, rather than the one from the calling bus. 3356 */ 3357 sim = device->sim; 3358 mtx = sim->mtx; 3359 if (mtx && !mtx_owned(mtx)) 3360 mtx_lock(mtx); 3361 else 3362 mtx = NULL; 3363 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms 3364 (*(sim->sim_action))(sim, work_ccb); 3365 if (mtx) 3366 mtx_unlock(mtx); 3367 mtx_lock(&devq->send_mtx); 3368 } 3369 devq->send_queue.qfrozen_cnt--; 3370 } 3371 3372 /* 3373 * This function merges stuff from the slave ccb into the master ccb, while 3374 * keeping important fields in the master ccb constant. 3375 */ 3376 void 3377 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3378 { 3379 3380 /* 3381 * Pull fields that are valid for peripheral drivers to set 3382 * into the master CCB along with the CCB "payload". 3383 */ 3384 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3385 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3386 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3387 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3388 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3389 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3390 } 3391 3392 void 3393 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path, 3394 u_int32_t priority, u_int32_t flags) 3395 { 3396 3397 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3398 ccb_h->pinfo.priority = priority; 3399 ccb_h->path = path; 3400 ccb_h->path_id = path->bus->path_id; 3401 if (path->target) 3402 ccb_h->target_id = path->target->target_id; 3403 else 3404 ccb_h->target_id = CAM_TARGET_WILDCARD; 3405 if (path->device) { 3406 ccb_h->target_lun = path->device->lun_id; 3407 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3408 } else { 3409 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3410 } 3411 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3412 ccb_h->flags = flags; 3413 ccb_h->xflags = 0; 3414 } 3415 3416 void 3417 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3418 { 3419 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0); 3420 } 3421 3422 /* Path manipulation functions */ 3423 cam_status 3424 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3425 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3426 { 3427 struct cam_path *path; 3428 cam_status status; 3429 3430 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3431 3432 if (path == NULL) { 3433 status = CAM_RESRC_UNAVAIL; 3434 return(status); 3435 } 3436 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3437 if (status != CAM_REQ_CMP) { 3438 free(path, M_CAMPATH); 3439 path = NULL; 3440 } 3441 *new_path_ptr = path; 3442 return (status); 3443 } 3444 3445 cam_status 3446 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3447 struct cam_periph *periph, path_id_t path_id, 3448 target_id_t target_id, lun_id_t lun_id) 3449 { 3450 3451 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3452 lun_id)); 3453 } 3454 3455 cam_status 3456 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3457 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3458 { 3459 struct cam_eb *bus; 3460 struct cam_et *target; 3461 struct cam_ed *device; 3462 cam_status status; 3463 3464 status = CAM_REQ_CMP; /* Completed without error */ 3465 target = NULL; /* Wildcarded */ 3466 device = NULL; /* Wildcarded */ 3467 3468 /* 3469 * We will potentially modify the EDT, so block interrupts 3470 * that may attempt to create cam paths. 3471 */ 3472 bus = xpt_find_bus(path_id); 3473 if (bus == NULL) { 3474 status = CAM_PATH_INVALID; 3475 } else { 3476 xpt_lock_buses(); 3477 mtx_lock(&bus->eb_mtx); 3478 target = xpt_find_target(bus, target_id); 3479 if (target == NULL) { 3480 /* Create one */ 3481 struct cam_et *new_target; 3482 3483 new_target = xpt_alloc_target(bus, target_id); 3484 if (new_target == NULL) { 3485 status = CAM_RESRC_UNAVAIL; 3486 } else { 3487 target = new_target; 3488 } 3489 } 3490 xpt_unlock_buses(); 3491 if (target != NULL) { 3492 device = xpt_find_device(target, lun_id); 3493 if (device == NULL) { 3494 /* Create one */ 3495 struct cam_ed *new_device; 3496 3497 new_device = 3498 (*(bus->xport->ops->alloc_device))(bus, 3499 target, 3500 lun_id); 3501 if (new_device == NULL) { 3502 status = CAM_RESRC_UNAVAIL; 3503 } else { 3504 device = new_device; 3505 } 3506 } 3507 } 3508 mtx_unlock(&bus->eb_mtx); 3509 } 3510 3511 /* 3512 * Only touch the user's data if we are successful. 3513 */ 3514 if (status == CAM_REQ_CMP) { 3515 new_path->periph = perph; 3516 new_path->bus = bus; 3517 new_path->target = target; 3518 new_path->device = device; 3519 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3520 } else { 3521 if (device != NULL) 3522 xpt_release_device(device); 3523 if (target != NULL) 3524 xpt_release_target(target); 3525 if (bus != NULL) 3526 xpt_release_bus(bus); 3527 } 3528 return (status); 3529 } 3530 3531 cam_status 3532 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3533 { 3534 struct cam_path *new_path; 3535 3536 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3537 if (new_path == NULL) 3538 return(CAM_RESRC_UNAVAIL); 3539 xpt_copy_path(new_path, path); 3540 *new_path_ptr = new_path; 3541 return (CAM_REQ_CMP); 3542 } 3543 3544 void 3545 xpt_copy_path(struct cam_path *new_path, struct cam_path *path) 3546 { 3547 3548 *new_path = *path; 3549 if (path->bus != NULL) 3550 xpt_acquire_bus(path->bus); 3551 if (path->target != NULL) 3552 xpt_acquire_target(path->target); 3553 if (path->device != NULL) 3554 xpt_acquire_device(path->device); 3555 } 3556 3557 void 3558 xpt_release_path(struct cam_path *path) 3559 { 3560 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3561 if (path->device != NULL) { 3562 xpt_release_device(path->device); 3563 path->device = NULL; 3564 } 3565 if (path->target != NULL) { 3566 xpt_release_target(path->target); 3567 path->target = NULL; 3568 } 3569 if (path->bus != NULL) { 3570 xpt_release_bus(path->bus); 3571 path->bus = NULL; 3572 } 3573 } 3574 3575 void 3576 xpt_free_path(struct cam_path *path) 3577 { 3578 3579 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3580 xpt_release_path(path); 3581 free(path, M_CAMPATH); 3582 } 3583 3584 void 3585 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3586 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3587 { 3588 3589 xpt_lock_buses(); 3590 if (bus_ref) { 3591 if (path->bus) 3592 *bus_ref = path->bus->refcount; 3593 else 3594 *bus_ref = 0; 3595 } 3596 if (periph_ref) { 3597 if (path->periph) 3598 *periph_ref = path->periph->refcount; 3599 else 3600 *periph_ref = 0; 3601 } 3602 xpt_unlock_buses(); 3603 if (target_ref) { 3604 if (path->target) 3605 *target_ref = path->target->refcount; 3606 else 3607 *target_ref = 0; 3608 } 3609 if (device_ref) { 3610 if (path->device) 3611 *device_ref = path->device->refcount; 3612 else 3613 *device_ref = 0; 3614 } 3615 } 3616 3617 /* 3618 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3619 * in path1, 2 for match with wildcards in path2. 3620 */ 3621 int 3622 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3623 { 3624 int retval = 0; 3625 3626 if (path1->bus != path2->bus) { 3627 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3628 retval = 1; 3629 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3630 retval = 2; 3631 else 3632 return (-1); 3633 } 3634 if (path1->target != path2->target) { 3635 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3636 if (retval == 0) 3637 retval = 1; 3638 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3639 retval = 2; 3640 else 3641 return (-1); 3642 } 3643 if (path1->device != path2->device) { 3644 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3645 if (retval == 0) 3646 retval = 1; 3647 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3648 retval = 2; 3649 else 3650 return (-1); 3651 } 3652 return (retval); 3653 } 3654 3655 int 3656 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3657 { 3658 int retval = 0; 3659 3660 if (path->bus != dev->target->bus) { 3661 if (path->bus->path_id == CAM_BUS_WILDCARD) 3662 retval = 1; 3663 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3664 retval = 2; 3665 else 3666 return (-1); 3667 } 3668 if (path->target != dev->target) { 3669 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3670 if (retval == 0) 3671 retval = 1; 3672 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3673 retval = 2; 3674 else 3675 return (-1); 3676 } 3677 if (path->device != dev) { 3678 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3679 if (retval == 0) 3680 retval = 1; 3681 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3682 retval = 2; 3683 else 3684 return (-1); 3685 } 3686 return (retval); 3687 } 3688 3689 void 3690 xpt_print_path(struct cam_path *path) 3691 { 3692 3693 if (path == NULL) 3694 printf("(nopath): "); 3695 else { 3696 if (path->periph != NULL) 3697 printf("(%s%d:", path->periph->periph_name, 3698 path->periph->unit_number); 3699 else 3700 printf("(noperiph:"); 3701 3702 if (path->bus != NULL) 3703 printf("%s%d:%d:", path->bus->sim->sim_name, 3704 path->bus->sim->unit_number, 3705 path->bus->sim->bus_id); 3706 else 3707 printf("nobus:"); 3708 3709 if (path->target != NULL) 3710 printf("%d:", path->target->target_id); 3711 else 3712 printf("X:"); 3713 3714 if (path->device != NULL) 3715 printf("%jx): ", (uintmax_t)path->device->lun_id); 3716 else 3717 printf("X): "); 3718 } 3719 } 3720 3721 void 3722 xpt_print_device(struct cam_ed *device) 3723 { 3724 3725 if (device == NULL) 3726 printf("(nopath): "); 3727 else { 3728 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3729 device->sim->unit_number, 3730 device->sim->bus_id, 3731 device->target->target_id, 3732 (uintmax_t)device->lun_id); 3733 } 3734 } 3735 3736 void 3737 xpt_print(struct cam_path *path, const char *fmt, ...) 3738 { 3739 va_list ap; 3740 xpt_print_path(path); 3741 va_start(ap, fmt); 3742 vprintf(fmt, ap); 3743 va_end(ap); 3744 } 3745 3746 int 3747 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3748 { 3749 struct sbuf sb; 3750 3751 sbuf_new(&sb, str, str_len, 0); 3752 3753 if (path == NULL) 3754 sbuf_printf(&sb, "(nopath): "); 3755 else { 3756 if (path->periph != NULL) 3757 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3758 path->periph->unit_number); 3759 else 3760 sbuf_printf(&sb, "(noperiph:"); 3761 3762 if (path->bus != NULL) 3763 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3764 path->bus->sim->unit_number, 3765 path->bus->sim->bus_id); 3766 else 3767 sbuf_printf(&sb, "nobus:"); 3768 3769 if (path->target != NULL) 3770 sbuf_printf(&sb, "%d:", path->target->target_id); 3771 else 3772 sbuf_printf(&sb, "X:"); 3773 3774 if (path->device != NULL) 3775 sbuf_printf(&sb, "%jx): ", 3776 (uintmax_t)path->device->lun_id); 3777 else 3778 sbuf_printf(&sb, "X): "); 3779 } 3780 sbuf_finish(&sb); 3781 3782 return(sbuf_len(&sb)); 3783 } 3784 3785 path_id_t 3786 xpt_path_path_id(struct cam_path *path) 3787 { 3788 return(path->bus->path_id); 3789 } 3790 3791 target_id_t 3792 xpt_path_target_id(struct cam_path *path) 3793 { 3794 if (path->target != NULL) 3795 return (path->target->target_id); 3796 else 3797 return (CAM_TARGET_WILDCARD); 3798 } 3799 3800 lun_id_t 3801 xpt_path_lun_id(struct cam_path *path) 3802 { 3803 if (path->device != NULL) 3804 return (path->device->lun_id); 3805 else 3806 return (CAM_LUN_WILDCARD); 3807 } 3808 3809 struct cam_sim * 3810 xpt_path_sim(struct cam_path *path) 3811 { 3812 3813 return (path->bus->sim); 3814 } 3815 3816 struct cam_periph* 3817 xpt_path_periph(struct cam_path *path) 3818 { 3819 3820 return (path->periph); 3821 } 3822 3823 /* 3824 * Release a CAM control block for the caller. Remit the cost of the structure 3825 * to the device referenced by the path. If the this device had no 'credits' 3826 * and peripheral drivers have registered async callbacks for this notification 3827 * call them now. 3828 */ 3829 void 3830 xpt_release_ccb(union ccb *free_ccb) 3831 { 3832 struct cam_ed *device; 3833 struct cam_periph *periph; 3834 3835 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3836 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3837 device = free_ccb->ccb_h.path->device; 3838 periph = free_ccb->ccb_h.path->periph; 3839 3840 xpt_free_ccb(free_ccb); 3841 periph->periph_allocated--; 3842 cam_ccbq_release_opening(&device->ccbq); 3843 xpt_run_allocq(periph, 0); 3844 } 3845 3846 /* Functions accessed by SIM drivers */ 3847 3848 static struct xpt_xport_ops xport_default_ops = { 3849 .alloc_device = xpt_alloc_device_default, 3850 .action = xpt_action_default, 3851 .async = xpt_dev_async_default, 3852 }; 3853 static struct xpt_xport xport_default = { 3854 .xport = XPORT_UNKNOWN, 3855 .name = "unknown", 3856 .ops = &xport_default_ops, 3857 }; 3858 3859 CAM_XPT_XPORT(xport_default); 3860 3861 /* 3862 * A sim structure, listing the SIM entry points and instance 3863 * identification info is passed to xpt_bus_register to hook the SIM 3864 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3865 * for this new bus and places it in the array of busses and assigns 3866 * it a path_id. The path_id may be influenced by "hard wiring" 3867 * information specified by the user. Once interrupt services are 3868 * available, the bus will be probed. 3869 */ 3870 int32_t 3871 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3872 { 3873 struct cam_eb *new_bus; 3874 struct cam_eb *old_bus; 3875 struct ccb_pathinq cpi; 3876 struct cam_path *path; 3877 cam_status status; 3878 3879 sim->bus_id = bus; 3880 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3881 M_CAMXPT, M_NOWAIT|M_ZERO); 3882 if (new_bus == NULL) { 3883 /* Couldn't satisfy request */ 3884 return (CAM_RESRC_UNAVAIL); 3885 } 3886 3887 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 3888 TAILQ_INIT(&new_bus->et_entries); 3889 cam_sim_hold(sim); 3890 new_bus->sim = sim; 3891 timevalclear(&new_bus->last_reset); 3892 new_bus->flags = 0; 3893 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3894 new_bus->generation = 0; 3895 3896 xpt_lock_buses(); 3897 sim->path_id = new_bus->path_id = 3898 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3899 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3900 while (old_bus != NULL 3901 && old_bus->path_id < new_bus->path_id) 3902 old_bus = TAILQ_NEXT(old_bus, links); 3903 if (old_bus != NULL) 3904 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3905 else 3906 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3907 xsoftc.bus_generation++; 3908 xpt_unlock_buses(); 3909 3910 /* 3911 * Set a default transport so that a PATH_INQ can be issued to 3912 * the SIM. This will then allow for probing and attaching of 3913 * a more appropriate transport. 3914 */ 3915 new_bus->xport = &xport_default; 3916 3917 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 3918 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3919 if (status != CAM_REQ_CMP) { 3920 xpt_release_bus(new_bus); 3921 return (CAM_RESRC_UNAVAIL); 3922 } 3923 3924 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3925 cpi.ccb_h.func_code = XPT_PATH_INQ; 3926 xpt_action((union ccb *)&cpi); 3927 3928 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3929 struct xpt_xport **xpt; 3930 3931 SET_FOREACH(xpt, cam_xpt_xport_set) { 3932 if ((*xpt)->xport == cpi.transport) { 3933 new_bus->xport = *xpt; 3934 break; 3935 } 3936 } 3937 if (new_bus->xport == NULL) { 3938 xpt_print_path(path); 3939 printf("No transport found for %d\n", cpi.transport); 3940 xpt_release_bus(new_bus); 3941 free(path, M_CAMXPT); 3942 return (CAM_RESRC_UNAVAIL); 3943 } 3944 } 3945 3946 /* Notify interested parties */ 3947 if (sim->path_id != CAM_XPT_PATH_ID) { 3948 3949 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3950 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 3951 union ccb *scan_ccb; 3952 3953 /* Initiate bus rescan. */ 3954 scan_ccb = xpt_alloc_ccb_nowait(); 3955 if (scan_ccb != NULL) { 3956 scan_ccb->ccb_h.path = path; 3957 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3958 scan_ccb->crcn.flags = 0; 3959 xpt_rescan(scan_ccb); 3960 } else { 3961 xpt_print(path, 3962 "Can't allocate CCB to scan bus\n"); 3963 xpt_free_path(path); 3964 } 3965 } else 3966 xpt_free_path(path); 3967 } else 3968 xpt_free_path(path); 3969 return (CAM_SUCCESS); 3970 } 3971 3972 int32_t 3973 xpt_bus_deregister(path_id_t pathid) 3974 { 3975 struct cam_path bus_path; 3976 cam_status status; 3977 3978 status = xpt_compile_path(&bus_path, NULL, pathid, 3979 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3980 if (status != CAM_REQ_CMP) 3981 return (status); 3982 3983 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3984 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3985 3986 /* Release the reference count held while registered. */ 3987 xpt_release_bus(bus_path.bus); 3988 xpt_release_path(&bus_path); 3989 3990 return (CAM_REQ_CMP); 3991 } 3992 3993 static path_id_t 3994 xptnextfreepathid(void) 3995 { 3996 struct cam_eb *bus; 3997 path_id_t pathid; 3998 const char *strval; 3999 4000 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4001 pathid = 0; 4002 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4003 retry: 4004 /* Find an unoccupied pathid */ 4005 while (bus != NULL && bus->path_id <= pathid) { 4006 if (bus->path_id == pathid) 4007 pathid++; 4008 bus = TAILQ_NEXT(bus, links); 4009 } 4010 4011 /* 4012 * Ensure that this pathid is not reserved for 4013 * a bus that may be registered in the future. 4014 */ 4015 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4016 ++pathid; 4017 /* Start the search over */ 4018 goto retry; 4019 } 4020 return (pathid); 4021 } 4022 4023 static path_id_t 4024 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4025 { 4026 path_id_t pathid; 4027 int i, dunit, val; 4028 char buf[32]; 4029 const char *dname; 4030 4031 pathid = CAM_XPT_PATH_ID; 4032 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4033 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 4034 return (pathid); 4035 i = 0; 4036 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4037 if (strcmp(dname, "scbus")) { 4038 /* Avoid a bit of foot shooting. */ 4039 continue; 4040 } 4041 if (dunit < 0) /* unwired?! */ 4042 continue; 4043 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4044 if (sim_bus == val) { 4045 pathid = dunit; 4046 break; 4047 } 4048 } else if (sim_bus == 0) { 4049 /* Unspecified matches bus 0 */ 4050 pathid = dunit; 4051 break; 4052 } else { 4053 printf("Ambiguous scbus configuration for %s%d " 4054 "bus %d, cannot wire down. The kernel " 4055 "config entry for scbus%d should " 4056 "specify a controller bus.\n" 4057 "Scbus will be assigned dynamically.\n", 4058 sim_name, sim_unit, sim_bus, dunit); 4059 break; 4060 } 4061 } 4062 4063 if (pathid == CAM_XPT_PATH_ID) 4064 pathid = xptnextfreepathid(); 4065 return (pathid); 4066 } 4067 4068 static const char * 4069 xpt_async_string(u_int32_t async_code) 4070 { 4071 4072 switch (async_code) { 4073 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4074 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4075 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4076 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4077 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4078 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4079 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4080 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4081 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4082 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4083 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4084 case AC_CONTRACT: return ("AC_CONTRACT"); 4085 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4086 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4087 } 4088 return ("AC_UNKNOWN"); 4089 } 4090 4091 static int 4092 xpt_async_size(u_int32_t async_code) 4093 { 4094 4095 switch (async_code) { 4096 case AC_BUS_RESET: return (0); 4097 case AC_UNSOL_RESEL: return (0); 4098 case AC_SCSI_AEN: return (0); 4099 case AC_SENT_BDR: return (0); 4100 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4101 case AC_PATH_DEREGISTERED: return (0); 4102 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4103 case AC_LOST_DEVICE: return (0); 4104 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4105 case AC_INQ_CHANGED: return (0); 4106 case AC_GETDEV_CHANGED: return (0); 4107 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4108 case AC_ADVINFO_CHANGED: return (-1); 4109 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4110 } 4111 return (0); 4112 } 4113 4114 static int 4115 xpt_async_process_dev(struct cam_ed *device, void *arg) 4116 { 4117 union ccb *ccb = arg; 4118 struct cam_path *path = ccb->ccb_h.path; 4119 void *async_arg = ccb->casync.async_arg_ptr; 4120 u_int32_t async_code = ccb->casync.async_code; 4121 int relock; 4122 4123 if (path->device != device 4124 && path->device->lun_id != CAM_LUN_WILDCARD 4125 && device->lun_id != CAM_LUN_WILDCARD) 4126 return (1); 4127 4128 /* 4129 * The async callback could free the device. 4130 * If it is a broadcast async, it doesn't hold 4131 * device reference, so take our own reference. 4132 */ 4133 xpt_acquire_device(device); 4134 4135 /* 4136 * If async for specific device is to be delivered to 4137 * the wildcard client, take the specific device lock. 4138 * XXX: We may need a way for client to specify it. 4139 */ 4140 if ((device->lun_id == CAM_LUN_WILDCARD && 4141 path->device->lun_id != CAM_LUN_WILDCARD) || 4142 (device->target->target_id == CAM_TARGET_WILDCARD && 4143 path->target->target_id != CAM_TARGET_WILDCARD) || 4144 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4145 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4146 mtx_unlock(&device->device_mtx); 4147 xpt_path_lock(path); 4148 relock = 1; 4149 } else 4150 relock = 0; 4151 4152 (*(device->target->bus->xport->ops->async))(async_code, 4153 device->target->bus, device->target, device, async_arg); 4154 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4155 4156 if (relock) { 4157 xpt_path_unlock(path); 4158 mtx_lock(&device->device_mtx); 4159 } 4160 xpt_release_device(device); 4161 return (1); 4162 } 4163 4164 static int 4165 xpt_async_process_tgt(struct cam_et *target, void *arg) 4166 { 4167 union ccb *ccb = arg; 4168 struct cam_path *path = ccb->ccb_h.path; 4169 4170 if (path->target != target 4171 && path->target->target_id != CAM_TARGET_WILDCARD 4172 && target->target_id != CAM_TARGET_WILDCARD) 4173 return (1); 4174 4175 if (ccb->casync.async_code == AC_SENT_BDR) { 4176 /* Update our notion of when the last reset occurred */ 4177 microtime(&target->last_reset); 4178 } 4179 4180 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4181 } 4182 4183 static void 4184 xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4185 { 4186 struct cam_eb *bus; 4187 struct cam_path *path; 4188 void *async_arg; 4189 u_int32_t async_code; 4190 4191 path = ccb->ccb_h.path; 4192 async_code = ccb->casync.async_code; 4193 async_arg = ccb->casync.async_arg_ptr; 4194 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4195 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4196 bus = path->bus; 4197 4198 if (async_code == AC_BUS_RESET) { 4199 /* Update our notion of when the last reset occurred */ 4200 microtime(&bus->last_reset); 4201 } 4202 4203 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4204 4205 /* 4206 * If this wasn't a fully wildcarded async, tell all 4207 * clients that want all async events. 4208 */ 4209 if (bus != xpt_periph->path->bus) { 4210 xpt_path_lock(xpt_periph->path); 4211 xpt_async_process_dev(xpt_periph->path->device, ccb); 4212 xpt_path_unlock(xpt_periph->path); 4213 } 4214 4215 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4216 xpt_release_devq(path, 1, TRUE); 4217 else 4218 xpt_release_simq(path->bus->sim, TRUE); 4219 if (ccb->casync.async_arg_size > 0) 4220 free(async_arg, M_CAMXPT); 4221 xpt_free_path(path); 4222 xpt_free_ccb(ccb); 4223 } 4224 4225 static void 4226 xpt_async_bcast(struct async_list *async_head, 4227 u_int32_t async_code, 4228 struct cam_path *path, void *async_arg) 4229 { 4230 struct async_node *cur_entry; 4231 struct mtx *mtx; 4232 4233 cur_entry = SLIST_FIRST(async_head); 4234 while (cur_entry != NULL) { 4235 struct async_node *next_entry; 4236 /* 4237 * Grab the next list entry before we call the current 4238 * entry's callback. This is because the callback function 4239 * can delete its async callback entry. 4240 */ 4241 next_entry = SLIST_NEXT(cur_entry, links); 4242 if ((cur_entry->event_enable & async_code) != 0) { 4243 mtx = cur_entry->event_lock ? 4244 path->device->sim->mtx : NULL; 4245 if (mtx) 4246 mtx_lock(mtx); 4247 cur_entry->callback(cur_entry->callback_arg, 4248 async_code, path, 4249 async_arg); 4250 if (mtx) 4251 mtx_unlock(mtx); 4252 } 4253 cur_entry = next_entry; 4254 } 4255 } 4256 4257 void 4258 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4259 { 4260 union ccb *ccb; 4261 int size; 4262 4263 ccb = xpt_alloc_ccb_nowait(); 4264 if (ccb == NULL) { 4265 xpt_print(path, "Can't allocate CCB to send %s\n", 4266 xpt_async_string(async_code)); 4267 return; 4268 } 4269 4270 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4271 xpt_print(path, "Can't allocate path to send %s\n", 4272 xpt_async_string(async_code)); 4273 xpt_free_ccb(ccb); 4274 return; 4275 } 4276 ccb->ccb_h.path->periph = NULL; 4277 ccb->ccb_h.func_code = XPT_ASYNC; 4278 ccb->ccb_h.cbfcnp = xpt_async_process; 4279 ccb->ccb_h.flags |= CAM_UNLOCKED; 4280 ccb->casync.async_code = async_code; 4281 ccb->casync.async_arg_size = 0; 4282 size = xpt_async_size(async_code); 4283 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 4284 ("xpt_async: func %#x %s aync_code %d %s\n", 4285 ccb->ccb_h.func_code, 4286 xpt_action_name(ccb->ccb_h.func_code), 4287 async_code, 4288 xpt_async_string(async_code))); 4289 if (size > 0 && async_arg != NULL) { 4290 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4291 if (ccb->casync.async_arg_ptr == NULL) { 4292 xpt_print(path, "Can't allocate argument to send %s\n", 4293 xpt_async_string(async_code)); 4294 xpt_free_path(ccb->ccb_h.path); 4295 xpt_free_ccb(ccb); 4296 return; 4297 } 4298 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4299 ccb->casync.async_arg_size = size; 4300 } else if (size < 0) { 4301 ccb->casync.async_arg_ptr = async_arg; 4302 ccb->casync.async_arg_size = size; 4303 } 4304 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4305 xpt_freeze_devq(path, 1); 4306 else 4307 xpt_freeze_simq(path->bus->sim, 1); 4308 xpt_done(ccb); 4309 } 4310 4311 static void 4312 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4313 struct cam_et *target, struct cam_ed *device, 4314 void *async_arg) 4315 { 4316 4317 /* 4318 * We only need to handle events for real devices. 4319 */ 4320 if (target->target_id == CAM_TARGET_WILDCARD 4321 || device->lun_id == CAM_LUN_WILDCARD) 4322 return; 4323 4324 printf("%s called\n", __func__); 4325 } 4326 4327 static uint32_t 4328 xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4329 { 4330 struct cam_devq *devq; 4331 uint32_t freeze; 4332 4333 devq = dev->sim->devq; 4334 mtx_assert(&devq->send_mtx, MA_OWNED); 4335 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4336 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4337 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4338 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4339 /* Remove frozen device from sendq. */ 4340 if (device_is_queued(dev)) 4341 camq_remove(&devq->send_queue, dev->devq_entry.index); 4342 return (freeze); 4343 } 4344 4345 u_int32_t 4346 xpt_freeze_devq(struct cam_path *path, u_int count) 4347 { 4348 struct cam_ed *dev = path->device; 4349 struct cam_devq *devq; 4350 uint32_t freeze; 4351 4352 devq = dev->sim->devq; 4353 mtx_lock(&devq->send_mtx); 4354 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4355 freeze = xpt_freeze_devq_device(dev, count); 4356 mtx_unlock(&devq->send_mtx); 4357 return (freeze); 4358 } 4359 4360 u_int32_t 4361 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4362 { 4363 struct cam_devq *devq; 4364 uint32_t freeze; 4365 4366 devq = sim->devq; 4367 mtx_lock(&devq->send_mtx); 4368 freeze = (devq->send_queue.qfrozen_cnt += count); 4369 mtx_unlock(&devq->send_mtx); 4370 return (freeze); 4371 } 4372 4373 static void 4374 xpt_release_devq_timeout(void *arg) 4375 { 4376 struct cam_ed *dev; 4377 struct cam_devq *devq; 4378 4379 dev = (struct cam_ed *)arg; 4380 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4381 devq = dev->sim->devq; 4382 mtx_assert(&devq->send_mtx, MA_OWNED); 4383 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4384 xpt_run_devq(devq); 4385 } 4386 4387 void 4388 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4389 { 4390 struct cam_ed *dev; 4391 struct cam_devq *devq; 4392 4393 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4394 count, run_queue)); 4395 dev = path->device; 4396 devq = dev->sim->devq; 4397 mtx_lock(&devq->send_mtx); 4398 if (xpt_release_devq_device(dev, count, run_queue)) 4399 xpt_run_devq(dev->sim->devq); 4400 mtx_unlock(&devq->send_mtx); 4401 } 4402 4403 static int 4404 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4405 { 4406 4407 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4408 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4409 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4410 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4411 if (count > dev->ccbq.queue.qfrozen_cnt) { 4412 #ifdef INVARIANTS 4413 printf("xpt_release_devq(): requested %u > present %u\n", 4414 count, dev->ccbq.queue.qfrozen_cnt); 4415 #endif 4416 count = dev->ccbq.queue.qfrozen_cnt; 4417 } 4418 dev->ccbq.queue.qfrozen_cnt -= count; 4419 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4420 /* 4421 * No longer need to wait for a successful 4422 * command completion. 4423 */ 4424 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4425 /* 4426 * Remove any timeouts that might be scheduled 4427 * to release this queue. 4428 */ 4429 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4430 callout_stop(&dev->callout); 4431 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4432 } 4433 /* 4434 * Now that we are unfrozen schedule the 4435 * device so any pending transactions are 4436 * run. 4437 */ 4438 xpt_schedule_devq(dev->sim->devq, dev); 4439 } else 4440 run_queue = 0; 4441 return (run_queue); 4442 } 4443 4444 void 4445 xpt_release_simq(struct cam_sim *sim, int run_queue) 4446 { 4447 struct cam_devq *devq; 4448 4449 devq = sim->devq; 4450 mtx_lock(&devq->send_mtx); 4451 if (devq->send_queue.qfrozen_cnt <= 0) { 4452 #ifdef INVARIANTS 4453 printf("xpt_release_simq: requested 1 > present %u\n", 4454 devq->send_queue.qfrozen_cnt); 4455 #endif 4456 } else 4457 devq->send_queue.qfrozen_cnt--; 4458 if (devq->send_queue.qfrozen_cnt == 0) { 4459 /* 4460 * If there is a timeout scheduled to release this 4461 * sim queue, remove it. The queue frozen count is 4462 * already at 0. 4463 */ 4464 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4465 callout_stop(&sim->callout); 4466 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4467 } 4468 if (run_queue) { 4469 /* 4470 * Now that we are unfrozen run the send queue. 4471 */ 4472 xpt_run_devq(sim->devq); 4473 } 4474 } 4475 mtx_unlock(&devq->send_mtx); 4476 } 4477 4478 /* 4479 * XXX Appears to be unused. 4480 */ 4481 static void 4482 xpt_release_simq_timeout(void *arg) 4483 { 4484 struct cam_sim *sim; 4485 4486 sim = (struct cam_sim *)arg; 4487 xpt_release_simq(sim, /* run_queue */ TRUE); 4488 } 4489 4490 void 4491 xpt_done(union ccb *done_ccb) 4492 { 4493 struct cam_doneq *queue; 4494 int run, hash; 4495 4496 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4497 ("xpt_done: func= %#x %s status %#x\n", 4498 done_ccb->ccb_h.func_code, 4499 xpt_action_name(done_ccb->ccb_h.func_code), 4500 done_ccb->ccb_h.status)); 4501 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4502 return; 4503 4504 /* Store the time the ccb was in the sim */ 4505 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data; 4506 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4507 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4508 queue = &cam_doneqs[hash]; 4509 mtx_lock(&queue->cam_doneq_mtx); 4510 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4511 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4512 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4513 mtx_unlock(&queue->cam_doneq_mtx); 4514 if (run) 4515 wakeup(&queue->cam_doneq); 4516 } 4517 4518 void 4519 xpt_done_direct(union ccb *done_ccb) 4520 { 4521 4522 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4523 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status)); 4524 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4525 return; 4526 4527 /* Store the time the ccb was in the sim */ 4528 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data; 4529 xpt_done_process(&done_ccb->ccb_h); 4530 } 4531 4532 union ccb * 4533 xpt_alloc_ccb() 4534 { 4535 union ccb *new_ccb; 4536 4537 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4538 return (new_ccb); 4539 } 4540 4541 union ccb * 4542 xpt_alloc_ccb_nowait() 4543 { 4544 union ccb *new_ccb; 4545 4546 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4547 return (new_ccb); 4548 } 4549 4550 void 4551 xpt_free_ccb(union ccb *free_ccb) 4552 { 4553 free(free_ccb, M_CAMCCB); 4554 } 4555 4556 4557 4558 /* Private XPT functions */ 4559 4560 /* 4561 * Get a CAM control block for the caller. Charge the structure to the device 4562 * referenced by the path. If we don't have sufficient resources to allocate 4563 * more ccbs, we return NULL. 4564 */ 4565 static union ccb * 4566 xpt_get_ccb_nowait(struct cam_periph *periph) 4567 { 4568 union ccb *new_ccb; 4569 4570 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4571 if (new_ccb == NULL) 4572 return (NULL); 4573 periph->periph_allocated++; 4574 cam_ccbq_take_opening(&periph->path->device->ccbq); 4575 return (new_ccb); 4576 } 4577 4578 static union ccb * 4579 xpt_get_ccb(struct cam_periph *periph) 4580 { 4581 union ccb *new_ccb; 4582 4583 cam_periph_unlock(periph); 4584 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4585 cam_periph_lock(periph); 4586 periph->periph_allocated++; 4587 cam_ccbq_take_opening(&periph->path->device->ccbq); 4588 return (new_ccb); 4589 } 4590 4591 union ccb * 4592 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4593 { 4594 struct ccb_hdr *ccb_h; 4595 4596 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4597 cam_periph_assert(periph, MA_OWNED); 4598 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4599 ccb_h->pinfo.priority != priority) { 4600 if (priority < periph->immediate_priority) { 4601 periph->immediate_priority = priority; 4602 xpt_run_allocq(periph, 0); 4603 } else 4604 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4605 "cgticb", 0); 4606 } 4607 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4608 return ((union ccb *)ccb_h); 4609 } 4610 4611 static void 4612 xpt_acquire_bus(struct cam_eb *bus) 4613 { 4614 4615 xpt_lock_buses(); 4616 bus->refcount++; 4617 xpt_unlock_buses(); 4618 } 4619 4620 static void 4621 xpt_release_bus(struct cam_eb *bus) 4622 { 4623 4624 xpt_lock_buses(); 4625 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4626 if (--bus->refcount > 0) { 4627 xpt_unlock_buses(); 4628 return; 4629 } 4630 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4631 xsoftc.bus_generation++; 4632 xpt_unlock_buses(); 4633 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4634 ("destroying bus, but target list is not empty")); 4635 cam_sim_release(bus->sim); 4636 mtx_destroy(&bus->eb_mtx); 4637 free(bus, M_CAMXPT); 4638 } 4639 4640 static struct cam_et * 4641 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4642 { 4643 struct cam_et *cur_target, *target; 4644 4645 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4646 mtx_assert(&bus->eb_mtx, MA_OWNED); 4647 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4648 M_NOWAIT|M_ZERO); 4649 if (target == NULL) 4650 return (NULL); 4651 4652 TAILQ_INIT(&target->ed_entries); 4653 target->bus = bus; 4654 target->target_id = target_id; 4655 target->refcount = 1; 4656 target->generation = 0; 4657 target->luns = NULL; 4658 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4659 timevalclear(&target->last_reset); 4660 /* 4661 * Hold a reference to our parent bus so it 4662 * will not go away before we do. 4663 */ 4664 bus->refcount++; 4665 4666 /* Insertion sort into our bus's target list */ 4667 cur_target = TAILQ_FIRST(&bus->et_entries); 4668 while (cur_target != NULL && cur_target->target_id < target_id) 4669 cur_target = TAILQ_NEXT(cur_target, links); 4670 if (cur_target != NULL) { 4671 TAILQ_INSERT_BEFORE(cur_target, target, links); 4672 } else { 4673 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4674 } 4675 bus->generation++; 4676 return (target); 4677 } 4678 4679 static void 4680 xpt_acquire_target(struct cam_et *target) 4681 { 4682 struct cam_eb *bus = target->bus; 4683 4684 mtx_lock(&bus->eb_mtx); 4685 target->refcount++; 4686 mtx_unlock(&bus->eb_mtx); 4687 } 4688 4689 static void 4690 xpt_release_target(struct cam_et *target) 4691 { 4692 struct cam_eb *bus = target->bus; 4693 4694 mtx_lock(&bus->eb_mtx); 4695 if (--target->refcount > 0) { 4696 mtx_unlock(&bus->eb_mtx); 4697 return; 4698 } 4699 TAILQ_REMOVE(&bus->et_entries, target, links); 4700 bus->generation++; 4701 mtx_unlock(&bus->eb_mtx); 4702 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4703 ("destroying target, but device list is not empty")); 4704 xpt_release_bus(bus); 4705 mtx_destroy(&target->luns_mtx); 4706 if (target->luns) 4707 free(target->luns, M_CAMXPT); 4708 free(target, M_CAMXPT); 4709 } 4710 4711 static struct cam_ed * 4712 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4713 lun_id_t lun_id) 4714 { 4715 struct cam_ed *device; 4716 4717 device = xpt_alloc_device(bus, target, lun_id); 4718 if (device == NULL) 4719 return (NULL); 4720 4721 device->mintags = 1; 4722 device->maxtags = 1; 4723 return (device); 4724 } 4725 4726 static void 4727 xpt_destroy_device(void *context, int pending) 4728 { 4729 struct cam_ed *device = context; 4730 4731 mtx_lock(&device->device_mtx); 4732 mtx_destroy(&device->device_mtx); 4733 free(device, M_CAMDEV); 4734 } 4735 4736 struct cam_ed * 4737 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4738 { 4739 struct cam_ed *cur_device, *device; 4740 struct cam_devq *devq; 4741 cam_status status; 4742 4743 mtx_assert(&bus->eb_mtx, MA_OWNED); 4744 /* Make space for us in the device queue on our bus */ 4745 devq = bus->sim->devq; 4746 mtx_lock(&devq->send_mtx); 4747 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4748 mtx_unlock(&devq->send_mtx); 4749 if (status != CAM_REQ_CMP) 4750 return (NULL); 4751 4752 device = (struct cam_ed *)malloc(sizeof(*device), 4753 M_CAMDEV, M_NOWAIT|M_ZERO); 4754 if (device == NULL) 4755 return (NULL); 4756 4757 cam_init_pinfo(&device->devq_entry); 4758 device->target = target; 4759 device->lun_id = lun_id; 4760 device->sim = bus->sim; 4761 if (cam_ccbq_init(&device->ccbq, 4762 bus->sim->max_dev_openings) != 0) { 4763 free(device, M_CAMDEV); 4764 return (NULL); 4765 } 4766 SLIST_INIT(&device->asyncs); 4767 SLIST_INIT(&device->periphs); 4768 device->generation = 0; 4769 device->flags = CAM_DEV_UNCONFIGURED; 4770 device->tag_delay_count = 0; 4771 device->tag_saved_openings = 0; 4772 device->refcount = 1; 4773 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4774 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4775 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4776 /* 4777 * Hold a reference to our parent bus so it 4778 * will not go away before we do. 4779 */ 4780 target->refcount++; 4781 4782 cur_device = TAILQ_FIRST(&target->ed_entries); 4783 while (cur_device != NULL && cur_device->lun_id < lun_id) 4784 cur_device = TAILQ_NEXT(cur_device, links); 4785 if (cur_device != NULL) 4786 TAILQ_INSERT_BEFORE(cur_device, device, links); 4787 else 4788 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4789 target->generation++; 4790 return (device); 4791 } 4792 4793 void 4794 xpt_acquire_device(struct cam_ed *device) 4795 { 4796 struct cam_eb *bus = device->target->bus; 4797 4798 mtx_lock(&bus->eb_mtx); 4799 device->refcount++; 4800 mtx_unlock(&bus->eb_mtx); 4801 } 4802 4803 void 4804 xpt_release_device(struct cam_ed *device) 4805 { 4806 struct cam_eb *bus = device->target->bus; 4807 struct cam_devq *devq; 4808 4809 mtx_lock(&bus->eb_mtx); 4810 if (--device->refcount > 0) { 4811 mtx_unlock(&bus->eb_mtx); 4812 return; 4813 } 4814 4815 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4816 device->target->generation++; 4817 mtx_unlock(&bus->eb_mtx); 4818 4819 /* Release our slot in the devq */ 4820 devq = bus->sim->devq; 4821 mtx_lock(&devq->send_mtx); 4822 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4823 mtx_unlock(&devq->send_mtx); 4824 4825 KASSERT(SLIST_EMPTY(&device->periphs), 4826 ("destroying device, but periphs list is not empty")); 4827 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4828 ("destroying device while still queued for ccbs")); 4829 4830 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4831 callout_stop(&device->callout); 4832 4833 xpt_release_target(device->target); 4834 4835 cam_ccbq_fini(&device->ccbq); 4836 /* 4837 * Free allocated memory. free(9) does nothing if the 4838 * supplied pointer is NULL, so it is safe to call without 4839 * checking. 4840 */ 4841 free(device->supported_vpds, M_CAMXPT); 4842 free(device->device_id, M_CAMXPT); 4843 free(device->ext_inq, M_CAMXPT); 4844 free(device->physpath, M_CAMXPT); 4845 free(device->rcap_buf, M_CAMXPT); 4846 free(device->serial_num, M_CAMXPT); 4847 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 4848 } 4849 4850 u_int32_t 4851 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4852 { 4853 int result; 4854 struct cam_ed *dev; 4855 4856 dev = path->device; 4857 mtx_lock(&dev->sim->devq->send_mtx); 4858 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4859 mtx_unlock(&dev->sim->devq->send_mtx); 4860 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4861 || (dev->inq_flags & SID_CmdQue) != 0) 4862 dev->tag_saved_openings = newopenings; 4863 return (result); 4864 } 4865 4866 static struct cam_eb * 4867 xpt_find_bus(path_id_t path_id) 4868 { 4869 struct cam_eb *bus; 4870 4871 xpt_lock_buses(); 4872 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4873 bus != NULL; 4874 bus = TAILQ_NEXT(bus, links)) { 4875 if (bus->path_id == path_id) { 4876 bus->refcount++; 4877 break; 4878 } 4879 } 4880 xpt_unlock_buses(); 4881 return (bus); 4882 } 4883 4884 static struct cam_et * 4885 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4886 { 4887 struct cam_et *target; 4888 4889 mtx_assert(&bus->eb_mtx, MA_OWNED); 4890 for (target = TAILQ_FIRST(&bus->et_entries); 4891 target != NULL; 4892 target = TAILQ_NEXT(target, links)) { 4893 if (target->target_id == target_id) { 4894 target->refcount++; 4895 break; 4896 } 4897 } 4898 return (target); 4899 } 4900 4901 static struct cam_ed * 4902 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4903 { 4904 struct cam_ed *device; 4905 4906 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 4907 for (device = TAILQ_FIRST(&target->ed_entries); 4908 device != NULL; 4909 device = TAILQ_NEXT(device, links)) { 4910 if (device->lun_id == lun_id) { 4911 device->refcount++; 4912 break; 4913 } 4914 } 4915 return (device); 4916 } 4917 4918 void 4919 xpt_start_tags(struct cam_path *path) 4920 { 4921 struct ccb_relsim crs; 4922 struct cam_ed *device; 4923 struct cam_sim *sim; 4924 int newopenings; 4925 4926 device = path->device; 4927 sim = path->bus->sim; 4928 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4929 xpt_freeze_devq(path, /*count*/1); 4930 device->inq_flags |= SID_CmdQue; 4931 if (device->tag_saved_openings != 0) 4932 newopenings = device->tag_saved_openings; 4933 else 4934 newopenings = min(device->maxtags, 4935 sim->max_tagged_dev_openings); 4936 xpt_dev_ccbq_resize(path, newopenings); 4937 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4938 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4939 crs.ccb_h.func_code = XPT_REL_SIMQ; 4940 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4941 crs.openings 4942 = crs.release_timeout 4943 = crs.qfrozen_cnt 4944 = 0; 4945 xpt_action((union ccb *)&crs); 4946 } 4947 4948 void 4949 xpt_stop_tags(struct cam_path *path) 4950 { 4951 struct ccb_relsim crs; 4952 struct cam_ed *device; 4953 struct cam_sim *sim; 4954 4955 device = path->device; 4956 sim = path->bus->sim; 4957 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4958 device->tag_delay_count = 0; 4959 xpt_freeze_devq(path, /*count*/1); 4960 device->inq_flags &= ~SID_CmdQue; 4961 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4962 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4963 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4964 crs.ccb_h.func_code = XPT_REL_SIMQ; 4965 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4966 crs.openings 4967 = crs.release_timeout 4968 = crs.qfrozen_cnt 4969 = 0; 4970 xpt_action((union ccb *)&crs); 4971 } 4972 4973 static void 4974 xpt_boot_delay(void *arg) 4975 { 4976 4977 xpt_release_boot(); 4978 } 4979 4980 static void 4981 xpt_config(void *arg) 4982 { 4983 /* 4984 * Now that interrupts are enabled, go find our devices 4985 */ 4986 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 4987 printf("xpt_config: failed to create taskqueue thread.\n"); 4988 4989 /* Setup debugging path */ 4990 if (cam_dflags != CAM_DEBUG_NONE) { 4991 if (xpt_create_path(&cam_dpath, NULL, 4992 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4993 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4994 printf("xpt_config: xpt_create_path() failed for debug" 4995 " target %d:%d:%d, debugging disabled\n", 4996 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4997 cam_dflags = CAM_DEBUG_NONE; 4998 } 4999 } else 5000 cam_dpath = NULL; 5001 5002 periphdriver_init(1); 5003 xpt_hold_boot(); 5004 callout_init(&xsoftc.boot_callout, 1); 5005 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0, 5006 xpt_boot_delay, NULL, 0); 5007 /* Fire up rescan thread. */ 5008 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 5009 "cam", "scanner")) { 5010 printf("xpt_config: failed to create rescan thread.\n"); 5011 } 5012 } 5013 5014 void 5015 xpt_hold_boot(void) 5016 { 5017 xpt_lock_buses(); 5018 xsoftc.buses_to_config++; 5019 xpt_unlock_buses(); 5020 } 5021 5022 void 5023 xpt_release_boot(void) 5024 { 5025 xpt_lock_buses(); 5026 xsoftc.buses_to_config--; 5027 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 5028 struct xpt_task *task; 5029 5030 xsoftc.buses_config_done = 1; 5031 xpt_unlock_buses(); 5032 /* Call manually because we don't have any busses */ 5033 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 5034 if (task != NULL) { 5035 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 5036 taskqueue_enqueue(taskqueue_thread, &task->task); 5037 } 5038 } else 5039 xpt_unlock_buses(); 5040 } 5041 5042 /* 5043 * If the given device only has one peripheral attached to it, and if that 5044 * peripheral is the passthrough driver, announce it. This insures that the 5045 * user sees some sort of announcement for every peripheral in their system. 5046 */ 5047 static int 5048 xptpassannouncefunc(struct cam_ed *device, void *arg) 5049 { 5050 struct cam_periph *periph; 5051 int i; 5052 5053 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5054 periph = SLIST_NEXT(periph, periph_links), i++); 5055 5056 periph = SLIST_FIRST(&device->periphs); 5057 if ((i == 1) 5058 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5059 xpt_announce_periph(periph, NULL); 5060 5061 return(1); 5062 } 5063 5064 static void 5065 xpt_finishconfig_task(void *context, int pending) 5066 { 5067 5068 periphdriver_init(2); 5069 /* 5070 * Check for devices with no "standard" peripheral driver 5071 * attached. For any devices like that, announce the 5072 * passthrough driver so the user will see something. 5073 */ 5074 if (!bootverbose) 5075 xpt_for_all_devices(xptpassannouncefunc, NULL); 5076 5077 /* Release our hook so that the boot can continue. */ 5078 config_intrhook_disestablish(xsoftc.xpt_config_hook); 5079 free(xsoftc.xpt_config_hook, M_CAMXPT); 5080 xsoftc.xpt_config_hook = NULL; 5081 5082 free(context, M_CAMXPT); 5083 } 5084 5085 cam_status 5086 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5087 struct cam_path *path) 5088 { 5089 struct ccb_setasync csa; 5090 cam_status status; 5091 int xptpath = 0; 5092 5093 if (path == NULL) { 5094 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5095 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5096 if (status != CAM_REQ_CMP) 5097 return (status); 5098 xpt_path_lock(path); 5099 xptpath = 1; 5100 } 5101 5102 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5103 csa.ccb_h.func_code = XPT_SASYNC_CB; 5104 csa.event_enable = event; 5105 csa.callback = cbfunc; 5106 csa.callback_arg = cbarg; 5107 xpt_action((union ccb *)&csa); 5108 status = csa.ccb_h.status; 5109 5110 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE, 5111 ("xpt_register_async: func %p\n", cbfunc)); 5112 5113 if (xptpath) { 5114 xpt_path_unlock(path); 5115 xpt_free_path(path); 5116 } 5117 5118 if ((status == CAM_REQ_CMP) && 5119 (csa.event_enable & AC_FOUND_DEVICE)) { 5120 /* 5121 * Get this peripheral up to date with all 5122 * the currently existing devices. 5123 */ 5124 xpt_for_all_devices(xptsetasyncfunc, &csa); 5125 } 5126 if ((status == CAM_REQ_CMP) && 5127 (csa.event_enable & AC_PATH_REGISTERED)) { 5128 /* 5129 * Get this peripheral up to date with all 5130 * the currently existing busses. 5131 */ 5132 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5133 } 5134 5135 return (status); 5136 } 5137 5138 static void 5139 xptaction(struct cam_sim *sim, union ccb *work_ccb) 5140 { 5141 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5142 5143 switch (work_ccb->ccb_h.func_code) { 5144 /* Common cases first */ 5145 case XPT_PATH_INQ: /* Path routing inquiry */ 5146 { 5147 struct ccb_pathinq *cpi; 5148 5149 cpi = &work_ccb->cpi; 5150 cpi->version_num = 1; /* XXX??? */ 5151 cpi->hba_inquiry = 0; 5152 cpi->target_sprt = 0; 5153 cpi->hba_misc = 0; 5154 cpi->hba_eng_cnt = 0; 5155 cpi->max_target = 0; 5156 cpi->max_lun = 0; 5157 cpi->initiator_id = 0; 5158 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5159 strlcpy(cpi->hba_vid, "", HBA_IDLEN); 5160 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5161 cpi->unit_number = sim->unit_number; 5162 cpi->bus_id = sim->bus_id; 5163 cpi->base_transfer_speed = 0; 5164 cpi->protocol = PROTO_UNSPECIFIED; 5165 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5166 cpi->transport = XPORT_UNSPECIFIED; 5167 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5168 cpi->ccb_h.status = CAM_REQ_CMP; 5169 xpt_done(work_ccb); 5170 break; 5171 } 5172 default: 5173 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5174 xpt_done(work_ccb); 5175 break; 5176 } 5177 } 5178 5179 /* 5180 * The xpt as a "controller" has no interrupt sources, so polling 5181 * is a no-op. 5182 */ 5183 static void 5184 xptpoll(struct cam_sim *sim) 5185 { 5186 } 5187 5188 void 5189 xpt_lock_buses(void) 5190 { 5191 mtx_lock(&xsoftc.xpt_topo_lock); 5192 } 5193 5194 void 5195 xpt_unlock_buses(void) 5196 { 5197 mtx_unlock(&xsoftc.xpt_topo_lock); 5198 } 5199 5200 struct mtx * 5201 xpt_path_mtx(struct cam_path *path) 5202 { 5203 5204 return (&path->device->device_mtx); 5205 } 5206 5207 static void 5208 xpt_done_process(struct ccb_hdr *ccb_h) 5209 { 5210 struct cam_sim *sim; 5211 struct cam_devq *devq; 5212 struct mtx *mtx = NULL; 5213 5214 if (ccb_h->flags & CAM_HIGH_POWER) { 5215 struct highpowerlist *hphead; 5216 struct cam_ed *device; 5217 5218 mtx_lock(&xsoftc.xpt_highpower_lock); 5219 hphead = &xsoftc.highpowerq; 5220 5221 device = STAILQ_FIRST(hphead); 5222 5223 /* 5224 * Increment the count since this command is done. 5225 */ 5226 xsoftc.num_highpower++; 5227 5228 /* 5229 * Any high powered commands queued up? 5230 */ 5231 if (device != NULL) { 5232 5233 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5234 mtx_unlock(&xsoftc.xpt_highpower_lock); 5235 5236 mtx_lock(&device->sim->devq->send_mtx); 5237 xpt_release_devq_device(device, 5238 /*count*/1, /*runqueue*/TRUE); 5239 mtx_unlock(&device->sim->devq->send_mtx); 5240 } else 5241 mtx_unlock(&xsoftc.xpt_highpower_lock); 5242 } 5243 5244 sim = ccb_h->path->bus->sim; 5245 5246 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5247 xpt_release_simq(sim, /*run_queue*/FALSE); 5248 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5249 } 5250 5251 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5252 && (ccb_h->status & CAM_DEV_QFRZN)) { 5253 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5254 ccb_h->status &= ~CAM_DEV_QFRZN; 5255 } 5256 5257 devq = sim->devq; 5258 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5259 struct cam_ed *dev = ccb_h->path->device; 5260 5261 mtx_lock(&devq->send_mtx); 5262 devq->send_active--; 5263 devq->send_openings++; 5264 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5265 5266 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5267 && (dev->ccbq.dev_active == 0))) { 5268 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5269 xpt_release_devq_device(dev, /*count*/1, 5270 /*run_queue*/FALSE); 5271 } 5272 5273 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5274 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5275 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5276 xpt_release_devq_device(dev, /*count*/1, 5277 /*run_queue*/FALSE); 5278 } 5279 5280 if (!device_is_queued(dev)) 5281 (void)xpt_schedule_devq(devq, dev); 5282 xpt_run_devq(devq); 5283 mtx_unlock(&devq->send_mtx); 5284 5285 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5286 mtx = xpt_path_mtx(ccb_h->path); 5287 mtx_lock(mtx); 5288 5289 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5290 && (--dev->tag_delay_count == 0)) 5291 xpt_start_tags(ccb_h->path); 5292 } 5293 } 5294 5295 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5296 if (mtx == NULL) { 5297 mtx = xpt_path_mtx(ccb_h->path); 5298 mtx_lock(mtx); 5299 } 5300 } else { 5301 if (mtx != NULL) { 5302 mtx_unlock(mtx); 5303 mtx = NULL; 5304 } 5305 } 5306 5307 /* Call the peripheral driver's callback */ 5308 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5309 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5310 if (mtx != NULL) 5311 mtx_unlock(mtx); 5312 } 5313 5314 void 5315 xpt_done_td(void *arg) 5316 { 5317 struct cam_doneq *queue = arg; 5318 struct ccb_hdr *ccb_h; 5319 STAILQ_HEAD(, ccb_hdr) doneq; 5320 5321 STAILQ_INIT(&doneq); 5322 mtx_lock(&queue->cam_doneq_mtx); 5323 while (1) { 5324 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5325 queue->cam_doneq_sleep = 1; 5326 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5327 PRIBIO, "-", 0); 5328 queue->cam_doneq_sleep = 0; 5329 } 5330 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5331 mtx_unlock(&queue->cam_doneq_mtx); 5332 5333 THREAD_NO_SLEEPING(); 5334 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5335 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5336 xpt_done_process(ccb_h); 5337 } 5338 THREAD_SLEEPING_OK(); 5339 5340 mtx_lock(&queue->cam_doneq_mtx); 5341 } 5342 } 5343 5344 static void 5345 camisr_runqueue(void) 5346 { 5347 struct ccb_hdr *ccb_h; 5348 struct cam_doneq *queue; 5349 int i; 5350 5351 /* Process global queues. */ 5352 for (i = 0; i < cam_num_doneqs; i++) { 5353 queue = &cam_doneqs[i]; 5354 mtx_lock(&queue->cam_doneq_mtx); 5355 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5356 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5357 mtx_unlock(&queue->cam_doneq_mtx); 5358 xpt_done_process(ccb_h); 5359 mtx_lock(&queue->cam_doneq_mtx); 5360 } 5361 mtx_unlock(&queue->cam_doneq_mtx); 5362 } 5363 } 5364 5365 struct kv 5366 { 5367 uint32_t v; 5368 const char *name; 5369 }; 5370 5371 static struct kv map[] = { 5372 { XPT_NOOP, "XPT_NOOP" }, 5373 { XPT_SCSI_IO, "XPT_SCSI_IO" }, 5374 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" }, 5375 { XPT_GDEVLIST, "XPT_GDEVLIST" }, 5376 { XPT_PATH_INQ, "XPT_PATH_INQ" }, 5377 { XPT_REL_SIMQ, "XPT_REL_SIMQ" }, 5378 { XPT_SASYNC_CB, "XPT_SASYNC_CB" }, 5379 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" }, 5380 { XPT_SCAN_BUS, "XPT_SCAN_BUS" }, 5381 { XPT_DEV_MATCH, "XPT_DEV_MATCH" }, 5382 { XPT_DEBUG, "XPT_DEBUG" }, 5383 { XPT_PATH_STATS, "XPT_PATH_STATS" }, 5384 { XPT_GDEV_STATS, "XPT_GDEV_STATS" }, 5385 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" }, 5386 { XPT_ASYNC, "XPT_ASYNC" }, 5387 { XPT_ABORT, "XPT_ABORT" }, 5388 { XPT_RESET_BUS, "XPT_RESET_BUS" }, 5389 { XPT_RESET_DEV, "XPT_RESET_DEV" }, 5390 { XPT_TERM_IO, "XPT_TERM_IO" }, 5391 { XPT_SCAN_LUN, "XPT_SCAN_LUN" }, 5392 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" }, 5393 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" }, 5394 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" }, 5395 { XPT_ATA_IO, "XPT_ATA_IO" }, 5396 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" }, 5397 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" }, 5398 { XPT_NVME_IO, "XPT_NVME_IO" }, 5399 { XPT_MMCSD_IO, "XPT_MMCSD_IO" }, 5400 { XPT_SMP_IO, "XPT_SMP_IO" }, 5401 { XPT_SCAN_TGT, "XPT_SCAN_TGT" }, 5402 { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" }, 5403 { XPT_ENG_INQ, "XPT_ENG_INQ" }, 5404 { XPT_ENG_EXEC, "XPT_ENG_EXEC" }, 5405 { XPT_EN_LUN, "XPT_EN_LUN" }, 5406 { XPT_TARGET_IO, "XPT_TARGET_IO" }, 5407 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" }, 5408 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" }, 5409 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" }, 5410 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" }, 5411 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" }, 5412 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" }, 5413 { 0, 0 } 5414 }; 5415 5416 static const char * 5417 xpt_action_name(uint32_t action) 5418 { 5419 static char buffer[32]; /* Only for unknown messages -- racy */ 5420 struct kv *walker = map; 5421 5422 while (walker->name != NULL) { 5423 if (walker->v == action) 5424 return (walker->name); 5425 walker++; 5426 } 5427 5428 snprintf(buffer, sizeof(buffer), "%#x", action); 5429 return (buffer); 5430 }
Cache object: 19eac8c39dd0ca7e10cb32ebadca169b
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