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sys/cam/cam_xpt.c
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1 /*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD: releng/8.4/sys/cam/cam_xpt.c 246432 2013-02-06 18:41:12Z mav $"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/systm.h> 36 #include <sys/types.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/time.h> 40 #include <sys/conf.h> 41 #include <sys/fcntl.h> 42 #include <sys/reboot.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/taskqueue.h> 46 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 #include <sys/sysctl.h> 50 #include <sys/kthread.h> 51 52 #include <cam/cam.h> 53 #include <cam/cam_ccb.h> 54 #include <cam/cam_periph.h> 55 #include <cam/cam_queue.h> 56 #include <cam/cam_sim.h> 57 #include <cam/cam_xpt.h> 58 #include <cam/cam_xpt_sim.h> 59 #include <cam/cam_xpt_periph.h> 60 #include <cam/cam_xpt_internal.h> 61 #include <cam/cam_debug.h> 62 63 #include <cam/scsi/scsi_all.h> 64 #include <cam/scsi/scsi_message.h> 65 #include <cam/scsi/scsi_pass.h> 66 67 #include <machine/md_var.h> /* geometry translation */ 68 #include <machine/stdarg.h> /* for xpt_print below */ 69 70 #include "opt_cam.h" 71 72 /* 73 * This is the maximum number of high powered commands (e.g. start unit) 74 * that can be outstanding at a particular time. 75 */ 76 #ifndef CAM_MAX_HIGHPOWER 77 #define CAM_MAX_HIGHPOWER 4 78 #endif 79 80 /* Datastructures internal to the xpt layer */ 81 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 82 83 /* Object for defering XPT actions to a taskqueue */ 84 struct xpt_task { 85 struct task task; 86 void *data1; 87 uintptr_t data2; 88 }; 89 90 typedef enum { 91 XPT_FLAG_OPEN = 0x01 92 } xpt_flags; 93 94 struct xpt_softc { 95 xpt_flags flags; 96 u_int32_t xpt_generation; 97 98 /* number of high powered commands that can go through right now */ 99 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 100 int num_highpower; 101 102 /* queue for handling async rescan requests. */ 103 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 104 int buses_to_config; 105 int buses_config_done; 106 107 /* Registered busses */ 108 TAILQ_HEAD(,cam_eb) xpt_busses; 109 u_int bus_generation; 110 111 struct intr_config_hook *xpt_config_hook; 112 113 int boot_delay; 114 struct callout boot_callout; 115 116 struct mtx xpt_topo_lock; 117 struct mtx xpt_lock; 118 }; 119 120 typedef enum { 121 DM_RET_COPY = 0x01, 122 DM_RET_FLAG_MASK = 0x0f, 123 DM_RET_NONE = 0x00, 124 DM_RET_STOP = 0x10, 125 DM_RET_DESCEND = 0x20, 126 DM_RET_ERROR = 0x30, 127 DM_RET_ACTION_MASK = 0xf0 128 } dev_match_ret; 129 130 typedef enum { 131 XPT_DEPTH_BUS, 132 XPT_DEPTH_TARGET, 133 XPT_DEPTH_DEVICE, 134 XPT_DEPTH_PERIPH 135 } xpt_traverse_depth; 136 137 struct xpt_traverse_config { 138 xpt_traverse_depth depth; 139 void *tr_func; 140 void *tr_arg; 141 }; 142 143 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 144 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 145 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 146 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 147 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 148 149 /* Transport layer configuration information */ 150 static struct xpt_softc xsoftc; 151 152 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay); 153 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 154 &xsoftc.boot_delay, 0, "Bus registration wait time"); 155 156 /* Queues for our software interrupt handler */ 157 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 158 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 159 static cam_simq_t cam_simq; 160 static struct mtx cam_simq_lock; 161 162 /* Pointers to software interrupt handlers */ 163 static void *cambio_ih; 164 165 struct cam_periph *xpt_periph; 166 167 static periph_init_t xpt_periph_init; 168 169 static struct periph_driver xpt_driver = 170 { 171 xpt_periph_init, "xpt", 172 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 173 CAM_PERIPH_DRV_EARLY 174 }; 175 176 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 177 178 static d_open_t xptopen; 179 static d_close_t xptclose; 180 static d_ioctl_t xptioctl; 181 182 static struct cdevsw xpt_cdevsw = { 183 .d_version = D_VERSION, 184 .d_flags = 0, 185 .d_open = xptopen, 186 .d_close = xptclose, 187 .d_ioctl = xptioctl, 188 .d_name = "xpt", 189 }; 190 191 /* Storage for debugging datastructures */ 192 struct cam_path *cam_dpath; 193 u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 194 TUNABLE_INT("kern.cam.dflags", &cam_dflags); 195 SYSCTL_INT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW, 196 &cam_dflags, 0, "Enabled debug flags"); 197 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 198 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay); 199 SYSCTL_INT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW, 200 &cam_debug_delay, 0, "Delay in us after each debug message"); 201 202 /* Our boot-time initialization hook */ 203 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 204 205 static moduledata_t cam_moduledata = { 206 "cam", 207 cam_module_event_handler, 208 NULL 209 }; 210 211 static int xpt_init(void *); 212 213 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 214 MODULE_VERSION(cam, 1); 215 216 217 static void xpt_async_bcast(struct async_list *async_head, 218 u_int32_t async_code, 219 struct cam_path *path, 220 void *async_arg); 221 static path_id_t xptnextfreepathid(void); 222 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 223 static union ccb *xpt_get_ccb(struct cam_ed *device); 224 static void xpt_run_dev_allocq(struct cam_eb *bus); 225 static void xpt_run_dev_sendq(struct cam_eb *bus); 226 static timeout_t xpt_release_devq_timeout; 227 static void xpt_release_simq_timeout(void *arg) __unused; 228 static void xpt_release_bus(struct cam_eb *bus); 229 static void xpt_release_devq_device(struct cam_ed *dev, cam_rl rl, 230 u_int count, int run_queue); 231 static struct cam_et* 232 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 233 static void xpt_release_target(struct cam_et *target); 234 static struct cam_eb* 235 xpt_find_bus(path_id_t path_id); 236 static struct cam_et* 237 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 238 static struct cam_ed* 239 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 240 static void xpt_config(void *arg); 241 static xpt_devicefunc_t xptpassannouncefunc; 242 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 243 static void xptpoll(struct cam_sim *sim); 244 static void camisr(void *); 245 static void camisr_runqueue(void *); 246 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 247 u_int num_patterns, struct cam_eb *bus); 248 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 249 u_int num_patterns, 250 struct cam_ed *device); 251 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 252 u_int num_patterns, 253 struct cam_periph *periph); 254 static xpt_busfunc_t xptedtbusfunc; 255 static xpt_targetfunc_t xptedttargetfunc; 256 static xpt_devicefunc_t xptedtdevicefunc; 257 static xpt_periphfunc_t xptedtperiphfunc; 258 static xpt_pdrvfunc_t xptplistpdrvfunc; 259 static xpt_periphfunc_t xptplistperiphfunc; 260 static int xptedtmatch(struct ccb_dev_match *cdm); 261 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 262 static int xptbustraverse(struct cam_eb *start_bus, 263 xpt_busfunc_t *tr_func, void *arg); 264 static int xpttargettraverse(struct cam_eb *bus, 265 struct cam_et *start_target, 266 xpt_targetfunc_t *tr_func, void *arg); 267 static int xptdevicetraverse(struct cam_et *target, 268 struct cam_ed *start_device, 269 xpt_devicefunc_t *tr_func, void *arg); 270 static int xptperiphtraverse(struct cam_ed *device, 271 struct cam_periph *start_periph, 272 xpt_periphfunc_t *tr_func, void *arg); 273 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 274 xpt_pdrvfunc_t *tr_func, void *arg); 275 static int xptpdperiphtraverse(struct periph_driver **pdrv, 276 struct cam_periph *start_periph, 277 xpt_periphfunc_t *tr_func, 278 void *arg); 279 static xpt_busfunc_t xptdefbusfunc; 280 static xpt_targetfunc_t xptdeftargetfunc; 281 static xpt_devicefunc_t xptdefdevicefunc; 282 static xpt_periphfunc_t xptdefperiphfunc; 283 static void xpt_finishconfig_task(void *context, int pending); 284 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 285 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 286 void *arg); 287 static void xpt_dev_async_default(u_int32_t async_code, 288 struct cam_eb *bus, 289 struct cam_et *target, 290 struct cam_ed *device, 291 void *async_arg); 292 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 293 struct cam_et *target, 294 lun_id_t lun_id); 295 static xpt_devicefunc_t xptsetasyncfunc; 296 static xpt_busfunc_t xptsetasyncbusfunc; 297 static cam_status xptregister(struct cam_periph *periph, 298 void *arg); 299 static __inline int periph_is_queued(struct cam_periph *periph); 300 static __inline int device_is_alloc_queued(struct cam_ed *device); 301 static __inline int device_is_send_queued(struct cam_ed *device); 302 303 static __inline int 304 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 305 { 306 int retval; 307 308 if ((dev->drvq.entries > 0) && 309 (dev->ccbq.devq_openings > 0) && 310 (cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 311 CAMQ_GET_PRIO(&dev->drvq))) == 0)) { 312 /* 313 * The priority of a device waiting for CCB resources 314 * is that of the highest priority peripheral driver 315 * enqueued. 316 */ 317 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 318 &dev->alloc_ccb_entry.pinfo, 319 CAMQ_GET_PRIO(&dev->drvq)); 320 } else { 321 retval = 0; 322 } 323 324 return (retval); 325 } 326 327 static __inline int 328 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 329 { 330 int retval; 331 332 if ((dev->ccbq.queue.entries > 0) && 333 (dev->ccbq.dev_openings > 0) && 334 (cam_ccbq_frozen_top(&dev->ccbq) == 0)) { 335 /* 336 * The priority of a device waiting for controller 337 * resources is that of the highest priority CCB 338 * enqueued. 339 */ 340 retval = 341 xpt_schedule_dev(&bus->sim->devq->send_queue, 342 &dev->send_ccb_entry.pinfo, 343 CAMQ_GET_PRIO(&dev->ccbq.queue)); 344 } else { 345 retval = 0; 346 } 347 return (retval); 348 } 349 350 static __inline int 351 periph_is_queued(struct cam_periph *periph) 352 { 353 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 354 } 355 356 static __inline int 357 device_is_alloc_queued(struct cam_ed *device) 358 { 359 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 360 } 361 362 static __inline int 363 device_is_send_queued(struct cam_ed *device) 364 { 365 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 366 } 367 368 static void 369 xpt_periph_init() 370 { 371 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 372 } 373 374 static void 375 xptdone(struct cam_periph *periph, union ccb *done_ccb) 376 { 377 /* Caller will release the CCB */ 378 wakeup(&done_ccb->ccb_h.cbfcnp); 379 } 380 381 static int 382 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 383 { 384 385 /* 386 * Only allow read-write access. 387 */ 388 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 389 return(EPERM); 390 391 /* 392 * We don't allow nonblocking access. 393 */ 394 if ((flags & O_NONBLOCK) != 0) { 395 printf("%s: can't do nonblocking access\n", devtoname(dev)); 396 return(ENODEV); 397 } 398 399 /* Mark ourselves open */ 400 mtx_lock(&xsoftc.xpt_lock); 401 xsoftc.flags |= XPT_FLAG_OPEN; 402 mtx_unlock(&xsoftc.xpt_lock); 403 404 return(0); 405 } 406 407 static int 408 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 409 { 410 411 /* Mark ourselves closed */ 412 mtx_lock(&xsoftc.xpt_lock); 413 xsoftc.flags &= ~XPT_FLAG_OPEN; 414 mtx_unlock(&xsoftc.xpt_lock); 415 416 return(0); 417 } 418 419 /* 420 * Don't automatically grab the xpt softc lock here even though this is going 421 * through the xpt device. The xpt device is really just a back door for 422 * accessing other devices and SIMs, so the right thing to do is to grab 423 * the appropriate SIM lock once the bus/SIM is located. 424 */ 425 static int 426 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 427 { 428 int error; 429 430 error = 0; 431 432 switch(cmd) { 433 /* 434 * For the transport layer CAMIOCOMMAND ioctl, we really only want 435 * to accept CCB types that don't quite make sense to send through a 436 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 437 * in the CAM spec. 438 */ 439 case CAMIOCOMMAND: { 440 union ccb *ccb; 441 union ccb *inccb; 442 struct cam_eb *bus; 443 444 inccb = (union ccb *)addr; 445 446 bus = xpt_find_bus(inccb->ccb_h.path_id); 447 if (bus == NULL) 448 return (EINVAL); 449 450 switch (inccb->ccb_h.func_code) { 451 case XPT_SCAN_BUS: 452 case XPT_RESET_BUS: 453 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 454 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 455 xpt_release_bus(bus); 456 return (EINVAL); 457 } 458 break; 459 case XPT_SCAN_TGT: 460 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 461 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 462 xpt_release_bus(bus); 463 return (EINVAL); 464 } 465 break; 466 default: 467 break; 468 } 469 470 switch(inccb->ccb_h.func_code) { 471 case XPT_SCAN_BUS: 472 case XPT_RESET_BUS: 473 case XPT_PATH_INQ: 474 case XPT_ENG_INQ: 475 case XPT_SCAN_LUN: 476 case XPT_SCAN_TGT: 477 478 ccb = xpt_alloc_ccb(); 479 480 CAM_SIM_LOCK(bus->sim); 481 482 /* 483 * Create a path using the bus, target, and lun the 484 * user passed in. 485 */ 486 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 487 inccb->ccb_h.path_id, 488 inccb->ccb_h.target_id, 489 inccb->ccb_h.target_lun) != 490 CAM_REQ_CMP){ 491 error = EINVAL; 492 CAM_SIM_UNLOCK(bus->sim); 493 xpt_free_ccb(ccb); 494 break; 495 } 496 /* Ensure all of our fields are correct */ 497 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 498 inccb->ccb_h.pinfo.priority); 499 xpt_merge_ccb(ccb, inccb); 500 ccb->ccb_h.cbfcnp = xptdone; 501 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 502 bcopy(ccb, inccb, sizeof(union ccb)); 503 xpt_free_path(ccb->ccb_h.path); 504 xpt_free_ccb(ccb); 505 CAM_SIM_UNLOCK(bus->sim); 506 break; 507 508 case XPT_DEBUG: { 509 union ccb ccb; 510 511 /* 512 * This is an immediate CCB, so it's okay to 513 * allocate it on the stack. 514 */ 515 516 CAM_SIM_LOCK(bus->sim); 517 518 /* 519 * Create a path using the bus, target, and lun the 520 * user passed in. 521 */ 522 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 523 inccb->ccb_h.path_id, 524 inccb->ccb_h.target_id, 525 inccb->ccb_h.target_lun) != 526 CAM_REQ_CMP){ 527 error = EINVAL; 528 CAM_SIM_UNLOCK(bus->sim); 529 break; 530 } 531 /* Ensure all of our fields are correct */ 532 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 533 inccb->ccb_h.pinfo.priority); 534 xpt_merge_ccb(&ccb, inccb); 535 ccb.ccb_h.cbfcnp = xptdone; 536 xpt_action(&ccb); 537 CAM_SIM_UNLOCK(bus->sim); 538 bcopy(&ccb, inccb, sizeof(union ccb)); 539 xpt_free_path(ccb.ccb_h.path); 540 break; 541 542 } 543 case XPT_DEV_MATCH: { 544 struct cam_periph_map_info mapinfo; 545 struct cam_path *old_path; 546 547 /* 548 * We can't deal with physical addresses for this 549 * type of transaction. 550 */ 551 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 552 error = EINVAL; 553 break; 554 } 555 556 /* 557 * Save this in case the caller had it set to 558 * something in particular. 559 */ 560 old_path = inccb->ccb_h.path; 561 562 /* 563 * We really don't need a path for the matching 564 * code. The path is needed because of the 565 * debugging statements in xpt_action(). They 566 * assume that the CCB has a valid path. 567 */ 568 inccb->ccb_h.path = xpt_periph->path; 569 570 bzero(&mapinfo, sizeof(mapinfo)); 571 572 /* 573 * Map the pattern and match buffers into kernel 574 * virtual address space. 575 */ 576 error = cam_periph_mapmem(inccb, &mapinfo); 577 578 if (error) { 579 inccb->ccb_h.path = old_path; 580 break; 581 } 582 583 /* 584 * This is an immediate CCB, we can send it on directly. 585 */ 586 xpt_action(inccb); 587 588 /* 589 * Map the buffers back into user space. 590 */ 591 cam_periph_unmapmem(inccb, &mapinfo); 592 593 inccb->ccb_h.path = old_path; 594 595 error = 0; 596 break; 597 } 598 default: 599 error = ENOTSUP; 600 break; 601 } 602 xpt_release_bus(bus); 603 break; 604 } 605 /* 606 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 607 * with the periphal driver name and unit name filled in. The other 608 * fields don't really matter as input. The passthrough driver name 609 * ("pass"), and unit number are passed back in the ccb. The current 610 * device generation number, and the index into the device peripheral 611 * driver list, and the status are also passed back. Note that 612 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 613 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 614 * (or rather should be) impossible for the device peripheral driver 615 * list to change since we look at the whole thing in one pass, and 616 * we do it with lock protection. 617 * 618 */ 619 case CAMGETPASSTHRU: { 620 union ccb *ccb; 621 struct cam_periph *periph; 622 struct periph_driver **p_drv; 623 char *name; 624 u_int unit; 625 u_int cur_generation; 626 int base_periph_found; 627 int splbreaknum; 628 629 ccb = (union ccb *)addr; 630 unit = ccb->cgdl.unit_number; 631 name = ccb->cgdl.periph_name; 632 /* 633 * Every 100 devices, we want to drop our lock protection to 634 * give the software interrupt handler a chance to run. 635 * Most systems won't run into this check, but this should 636 * avoid starvation in the software interrupt handler in 637 * large systems. 638 */ 639 splbreaknum = 100; 640 641 ccb = (union ccb *)addr; 642 643 base_periph_found = 0; 644 645 /* 646 * Sanity check -- make sure we don't get a null peripheral 647 * driver name. 648 */ 649 if (*ccb->cgdl.periph_name == '\0') { 650 error = EINVAL; 651 break; 652 } 653 654 /* Keep the list from changing while we traverse it */ 655 mtx_lock(&xsoftc.xpt_topo_lock); 656 ptstartover: 657 cur_generation = xsoftc.xpt_generation; 658 659 /* first find our driver in the list of drivers */ 660 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 661 if (strcmp((*p_drv)->driver_name, name) == 0) 662 break; 663 664 if (*p_drv == NULL) { 665 mtx_unlock(&xsoftc.xpt_topo_lock); 666 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 667 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 668 *ccb->cgdl.periph_name = '\0'; 669 ccb->cgdl.unit_number = 0; 670 error = ENOENT; 671 break; 672 } 673 674 /* 675 * Run through every peripheral instance of this driver 676 * and check to see whether it matches the unit passed 677 * in by the user. If it does, get out of the loops and 678 * find the passthrough driver associated with that 679 * peripheral driver. 680 */ 681 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 682 periph = TAILQ_NEXT(periph, unit_links)) { 683 684 if (periph->unit_number == unit) { 685 break; 686 } else if (--splbreaknum == 0) { 687 mtx_unlock(&xsoftc.xpt_topo_lock); 688 mtx_lock(&xsoftc.xpt_topo_lock); 689 splbreaknum = 100; 690 if (cur_generation != xsoftc.xpt_generation) 691 goto ptstartover; 692 } 693 } 694 /* 695 * If we found the peripheral driver that the user passed 696 * in, go through all of the peripheral drivers for that 697 * particular device and look for a passthrough driver. 698 */ 699 if (periph != NULL) { 700 struct cam_ed *device; 701 int i; 702 703 base_periph_found = 1; 704 device = periph->path->device; 705 for (i = 0, periph = SLIST_FIRST(&device->periphs); 706 periph != NULL; 707 periph = SLIST_NEXT(periph, periph_links), i++) { 708 /* 709 * Check to see whether we have a 710 * passthrough device or not. 711 */ 712 if (strcmp(periph->periph_name, "pass") == 0) { 713 /* 714 * Fill in the getdevlist fields. 715 */ 716 strcpy(ccb->cgdl.periph_name, 717 periph->periph_name); 718 ccb->cgdl.unit_number = 719 periph->unit_number; 720 if (SLIST_NEXT(periph, periph_links)) 721 ccb->cgdl.status = 722 CAM_GDEVLIST_MORE_DEVS; 723 else 724 ccb->cgdl.status = 725 CAM_GDEVLIST_LAST_DEVICE; 726 ccb->cgdl.generation = 727 device->generation; 728 ccb->cgdl.index = i; 729 /* 730 * Fill in some CCB header fields 731 * that the user may want. 732 */ 733 ccb->ccb_h.path_id = 734 periph->path->bus->path_id; 735 ccb->ccb_h.target_id = 736 periph->path->target->target_id; 737 ccb->ccb_h.target_lun = 738 periph->path->device->lun_id; 739 ccb->ccb_h.status = CAM_REQ_CMP; 740 break; 741 } 742 } 743 } 744 745 /* 746 * If the periph is null here, one of two things has 747 * happened. The first possibility is that we couldn't 748 * find the unit number of the particular peripheral driver 749 * that the user is asking about. e.g. the user asks for 750 * the passthrough driver for "da11". We find the list of 751 * "da" peripherals all right, but there is no unit 11. 752 * The other possibility is that we went through the list 753 * of peripheral drivers attached to the device structure, 754 * but didn't find one with the name "pass". Either way, 755 * we return ENOENT, since we couldn't find something. 756 */ 757 if (periph == NULL) { 758 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 759 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 760 *ccb->cgdl.periph_name = '\0'; 761 ccb->cgdl.unit_number = 0; 762 error = ENOENT; 763 /* 764 * It is unfortunate that this is even necessary, 765 * but there are many, many clueless users out there. 766 * If this is true, the user is looking for the 767 * passthrough driver, but doesn't have one in his 768 * kernel. 769 */ 770 if (base_periph_found == 1) { 771 printf("xptioctl: pass driver is not in the " 772 "kernel\n"); 773 printf("xptioctl: put \"device pass\" in " 774 "your kernel config file\n"); 775 } 776 } 777 mtx_unlock(&xsoftc.xpt_topo_lock); 778 break; 779 } 780 default: 781 error = ENOTTY; 782 break; 783 } 784 785 return(error); 786 } 787 788 static int 789 cam_module_event_handler(module_t mod, int what, void *arg) 790 { 791 int error; 792 793 switch (what) { 794 case MOD_LOAD: 795 if ((error = xpt_init(NULL)) != 0) 796 return (error); 797 break; 798 case MOD_UNLOAD: 799 return EBUSY; 800 default: 801 return EOPNOTSUPP; 802 } 803 804 return 0; 805 } 806 807 static void 808 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 809 { 810 811 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 812 xpt_free_path(done_ccb->ccb_h.path); 813 xpt_free_ccb(done_ccb); 814 } else { 815 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 816 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 817 } 818 xpt_release_boot(); 819 } 820 821 /* thread to handle bus rescans */ 822 static void 823 xpt_scanner_thread(void *dummy) 824 { 825 union ccb *ccb; 826 struct cam_sim *sim; 827 828 xpt_lock_buses(); 829 for (;;) { 830 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 831 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 832 "ccb_scanq", 0); 833 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 834 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 835 xpt_unlock_buses(); 836 837 sim = ccb->ccb_h.path->bus->sim; 838 CAM_SIM_LOCK(sim); 839 xpt_action(ccb); 840 CAM_SIM_UNLOCK(sim); 841 842 xpt_lock_buses(); 843 } 844 } 845 } 846 847 void 848 xpt_rescan(union ccb *ccb) 849 { 850 struct ccb_hdr *hdr; 851 852 /* Prepare request */ 853 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 854 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 855 ccb->ccb_h.func_code = XPT_SCAN_BUS; 856 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 857 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 858 ccb->ccb_h.func_code = XPT_SCAN_TGT; 859 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 860 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 861 ccb->ccb_h.func_code = XPT_SCAN_LUN; 862 else { 863 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 864 xpt_free_path(ccb->ccb_h.path); 865 xpt_free_ccb(ccb); 866 return; 867 } 868 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 869 ccb->ccb_h.cbfcnp = xpt_rescan_done; 870 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 871 /* Don't make duplicate entries for the same paths. */ 872 xpt_lock_buses(); 873 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 874 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 875 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 876 wakeup(&xsoftc.ccb_scanq); 877 xpt_unlock_buses(); 878 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 879 xpt_free_path(ccb->ccb_h.path); 880 xpt_free_ccb(ccb); 881 return; 882 } 883 } 884 } 885 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 886 xsoftc.buses_to_config++; 887 wakeup(&xsoftc.ccb_scanq); 888 xpt_unlock_buses(); 889 } 890 891 /* Functions accessed by the peripheral drivers */ 892 static int 893 xpt_init(void *dummy) 894 { 895 struct cam_sim *xpt_sim; 896 struct cam_path *path; 897 struct cam_devq *devq; 898 cam_status status; 899 900 TAILQ_INIT(&xsoftc.xpt_busses); 901 TAILQ_INIT(&cam_simq); 902 TAILQ_INIT(&xsoftc.ccb_scanq); 903 STAILQ_INIT(&xsoftc.highpowerq); 904 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 905 906 mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF); 907 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 908 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF); 909 910 /* 911 * The xpt layer is, itself, the equivelent of a SIM. 912 * Allow 16 ccbs in the ccb pool for it. This should 913 * give decent parallelism when we probe busses and 914 * perform other XPT functions. 915 */ 916 devq = cam_simq_alloc(16); 917 xpt_sim = cam_sim_alloc(xptaction, 918 xptpoll, 919 "xpt", 920 /*softc*/NULL, 921 /*unit*/0, 922 /*mtx*/&xsoftc.xpt_lock, 923 /*max_dev_transactions*/0, 924 /*max_tagged_dev_transactions*/0, 925 devq); 926 if (xpt_sim == NULL) 927 return (ENOMEM); 928 929 mtx_lock(&xsoftc.xpt_lock); 930 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 931 mtx_unlock(&xsoftc.xpt_lock); 932 printf("xpt_init: xpt_bus_register failed with status %#x," 933 " failing attach\n", status); 934 return (EINVAL); 935 } 936 937 /* 938 * Looking at the XPT from the SIM layer, the XPT is 939 * the equivelent of a peripheral driver. Allocate 940 * a peripheral driver entry for us. 941 */ 942 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 943 CAM_TARGET_WILDCARD, 944 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 945 mtx_unlock(&xsoftc.xpt_lock); 946 printf("xpt_init: xpt_create_path failed with status %#x," 947 " failing attach\n", status); 948 return (EINVAL); 949 } 950 951 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 952 path, NULL, 0, xpt_sim); 953 xpt_free_path(path); 954 mtx_unlock(&xsoftc.xpt_lock); 955 /* Install our software interrupt handlers */ 956 swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih); 957 /* 958 * Register a callback for when interrupts are enabled. 959 */ 960 xsoftc.xpt_config_hook = 961 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 962 M_CAMXPT, M_NOWAIT | M_ZERO); 963 if (xsoftc.xpt_config_hook == NULL) { 964 printf("xpt_init: Cannot malloc config hook " 965 "- failing attach\n"); 966 return (ENOMEM); 967 } 968 xsoftc.xpt_config_hook->ich_func = xpt_config; 969 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 970 free (xsoftc.xpt_config_hook, M_CAMXPT); 971 printf("xpt_init: config_intrhook_establish failed " 972 "- failing attach\n"); 973 } 974 975 return (0); 976 } 977 978 static cam_status 979 xptregister(struct cam_periph *periph, void *arg) 980 { 981 struct cam_sim *xpt_sim; 982 983 if (periph == NULL) { 984 printf("xptregister: periph was NULL!!\n"); 985 return(CAM_REQ_CMP_ERR); 986 } 987 988 xpt_sim = (struct cam_sim *)arg; 989 xpt_sim->softc = periph; 990 xpt_periph = periph; 991 periph->softc = NULL; 992 993 return(CAM_REQ_CMP); 994 } 995 996 int32_t 997 xpt_add_periph(struct cam_periph *periph) 998 { 999 struct cam_ed *device; 1000 int32_t status; 1001 struct periph_list *periph_head; 1002 1003 mtx_assert(periph->sim->mtx, MA_OWNED); 1004 1005 device = periph->path->device; 1006 1007 periph_head = &device->periphs; 1008 1009 status = CAM_REQ_CMP; 1010 1011 if (device != NULL) { 1012 /* 1013 * Make room for this peripheral 1014 * so it will fit in the queue 1015 * when it's scheduled to run 1016 */ 1017 status = camq_resize(&device->drvq, 1018 device->drvq.array_size + 1); 1019 1020 device->generation++; 1021 1022 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1023 } 1024 1025 mtx_lock(&xsoftc.xpt_topo_lock); 1026 xsoftc.xpt_generation++; 1027 mtx_unlock(&xsoftc.xpt_topo_lock); 1028 1029 return (status); 1030 } 1031 1032 void 1033 xpt_remove_periph(struct cam_periph *periph) 1034 { 1035 struct cam_ed *device; 1036 1037 mtx_assert(periph->sim->mtx, MA_OWNED); 1038 1039 device = periph->path->device; 1040 1041 if (device != NULL) { 1042 struct periph_list *periph_head; 1043 1044 periph_head = &device->periphs; 1045 1046 /* Release the slot for this peripheral */ 1047 camq_resize(&device->drvq, device->drvq.array_size - 1); 1048 1049 device->generation++; 1050 1051 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1052 } 1053 1054 mtx_lock(&xsoftc.xpt_topo_lock); 1055 xsoftc.xpt_generation++; 1056 mtx_unlock(&xsoftc.xpt_topo_lock); 1057 } 1058 1059 1060 void 1061 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1062 { 1063 struct cam_path *path = periph->path; 1064 1065 mtx_assert(periph->sim->mtx, MA_OWNED); 1066 1067 printf("%s%d at %s%d bus %d scbus%d target %d lun %d\n", 1068 periph->periph_name, periph->unit_number, 1069 path->bus->sim->sim_name, 1070 path->bus->sim->unit_number, 1071 path->bus->sim->bus_id, 1072 path->bus->path_id, 1073 path->target->target_id, 1074 path->device->lun_id); 1075 printf("%s%d: ", periph->periph_name, periph->unit_number); 1076 if (path->device->protocol == PROTO_SCSI) 1077 scsi_print_inquiry(&path->device->inq_data); 1078 else if (path->device->protocol == PROTO_ATA || 1079 path->device->protocol == PROTO_SATAPM) 1080 ata_print_ident(&path->device->ident_data); 1081 else 1082 printf("Unknown protocol device\n"); 1083 if (bootverbose && path->device->serial_num_len > 0) { 1084 /* Don't wrap the screen - print only the first 60 chars */ 1085 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1086 periph->unit_number, path->device->serial_num); 1087 } 1088 /* Announce transport details. */ 1089 (*(path->bus->xport->announce))(periph); 1090 /* Announce command queueing. */ 1091 if (path->device->inq_flags & SID_CmdQue 1092 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1093 printf("%s%d: Command Queueing enabled\n", 1094 periph->periph_name, periph->unit_number); 1095 } 1096 /* Announce caller's details if they've passed in. */ 1097 if (announce_string != NULL) 1098 printf("%s%d: %s\n", periph->periph_name, 1099 periph->unit_number, announce_string); 1100 } 1101 1102 static dev_match_ret 1103 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1104 struct cam_eb *bus) 1105 { 1106 dev_match_ret retval; 1107 int i; 1108 1109 retval = DM_RET_NONE; 1110 1111 /* 1112 * If we aren't given something to match against, that's an error. 1113 */ 1114 if (bus == NULL) 1115 return(DM_RET_ERROR); 1116 1117 /* 1118 * If there are no match entries, then this bus matches no 1119 * matter what. 1120 */ 1121 if ((patterns == NULL) || (num_patterns == 0)) 1122 return(DM_RET_DESCEND | DM_RET_COPY); 1123 1124 for (i = 0; i < num_patterns; i++) { 1125 struct bus_match_pattern *cur_pattern; 1126 1127 /* 1128 * If the pattern in question isn't for a bus node, we 1129 * aren't interested. However, we do indicate to the 1130 * calling routine that we should continue descending the 1131 * tree, since the user wants to match against lower-level 1132 * EDT elements. 1133 */ 1134 if (patterns[i].type != DEV_MATCH_BUS) { 1135 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1136 retval |= DM_RET_DESCEND; 1137 continue; 1138 } 1139 1140 cur_pattern = &patterns[i].pattern.bus_pattern; 1141 1142 /* 1143 * If they want to match any bus node, we give them any 1144 * device node. 1145 */ 1146 if (cur_pattern->flags == BUS_MATCH_ANY) { 1147 /* set the copy flag */ 1148 retval |= DM_RET_COPY; 1149 1150 /* 1151 * If we've already decided on an action, go ahead 1152 * and return. 1153 */ 1154 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1155 return(retval); 1156 } 1157 1158 /* 1159 * Not sure why someone would do this... 1160 */ 1161 if (cur_pattern->flags == BUS_MATCH_NONE) 1162 continue; 1163 1164 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1165 && (cur_pattern->path_id != bus->path_id)) 1166 continue; 1167 1168 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1169 && (cur_pattern->bus_id != bus->sim->bus_id)) 1170 continue; 1171 1172 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1173 && (cur_pattern->unit_number != bus->sim->unit_number)) 1174 continue; 1175 1176 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1177 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1178 DEV_IDLEN) != 0)) 1179 continue; 1180 1181 /* 1182 * If we get to this point, the user definitely wants 1183 * information on this bus. So tell the caller to copy the 1184 * data out. 1185 */ 1186 retval |= DM_RET_COPY; 1187 1188 /* 1189 * If the return action has been set to descend, then we 1190 * know that we've already seen a non-bus matching 1191 * expression, therefore we need to further descend the tree. 1192 * This won't change by continuing around the loop, so we 1193 * go ahead and return. If we haven't seen a non-bus 1194 * matching expression, we keep going around the loop until 1195 * we exhaust the matching expressions. We'll set the stop 1196 * flag once we fall out of the loop. 1197 */ 1198 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1199 return(retval); 1200 } 1201 1202 /* 1203 * If the return action hasn't been set to descend yet, that means 1204 * we haven't seen anything other than bus matching patterns. So 1205 * tell the caller to stop descending the tree -- the user doesn't 1206 * want to match against lower level tree elements. 1207 */ 1208 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1209 retval |= DM_RET_STOP; 1210 1211 return(retval); 1212 } 1213 1214 static dev_match_ret 1215 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1216 struct cam_ed *device) 1217 { 1218 dev_match_ret retval; 1219 int i; 1220 1221 retval = DM_RET_NONE; 1222 1223 /* 1224 * If we aren't given something to match against, that's an error. 1225 */ 1226 if (device == NULL) 1227 return(DM_RET_ERROR); 1228 1229 /* 1230 * If there are no match entries, then this device matches no 1231 * matter what. 1232 */ 1233 if ((patterns == NULL) || (num_patterns == 0)) 1234 return(DM_RET_DESCEND | DM_RET_COPY); 1235 1236 for (i = 0; i < num_patterns; i++) { 1237 struct device_match_pattern *cur_pattern; 1238 1239 /* 1240 * If the pattern in question isn't for a device node, we 1241 * aren't interested. 1242 */ 1243 if (patterns[i].type != DEV_MATCH_DEVICE) { 1244 if ((patterns[i].type == DEV_MATCH_PERIPH) 1245 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1246 retval |= DM_RET_DESCEND; 1247 continue; 1248 } 1249 1250 cur_pattern = &patterns[i].pattern.device_pattern; 1251 1252 /* 1253 * If they want to match any device node, we give them any 1254 * device node. 1255 */ 1256 if (cur_pattern->flags == DEV_MATCH_ANY) { 1257 /* set the copy flag */ 1258 retval |= DM_RET_COPY; 1259 1260 1261 /* 1262 * If we've already decided on an action, go ahead 1263 * and return. 1264 */ 1265 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1266 return(retval); 1267 } 1268 1269 /* 1270 * Not sure why someone would do this... 1271 */ 1272 if (cur_pattern->flags == DEV_MATCH_NONE) 1273 continue; 1274 1275 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1276 && (cur_pattern->path_id != device->target->bus->path_id)) 1277 continue; 1278 1279 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1280 && (cur_pattern->target_id != device->target->target_id)) 1281 continue; 1282 1283 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1284 && (cur_pattern->target_lun != device->lun_id)) 1285 continue; 1286 1287 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1288 && (cam_quirkmatch((caddr_t)&device->inq_data, 1289 (caddr_t)&cur_pattern->inq_pat, 1290 1, sizeof(cur_pattern->inq_pat), 1291 scsi_static_inquiry_match) == NULL)) 1292 continue; 1293 1294 /* 1295 * If we get to this point, the user definitely wants 1296 * information on this device. So tell the caller to copy 1297 * the data out. 1298 */ 1299 retval |= DM_RET_COPY; 1300 1301 /* 1302 * If the return action has been set to descend, then we 1303 * know that we've already seen a peripheral matching 1304 * expression, therefore we need to further descend the tree. 1305 * This won't change by continuing around the loop, so we 1306 * go ahead and return. If we haven't seen a peripheral 1307 * matching expression, we keep going around the loop until 1308 * we exhaust the matching expressions. We'll set the stop 1309 * flag once we fall out of the loop. 1310 */ 1311 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1312 return(retval); 1313 } 1314 1315 /* 1316 * If the return action hasn't been set to descend yet, that means 1317 * we haven't seen any peripheral matching patterns. So tell the 1318 * caller to stop descending the tree -- the user doesn't want to 1319 * match against lower level tree elements. 1320 */ 1321 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1322 retval |= DM_RET_STOP; 1323 1324 return(retval); 1325 } 1326 1327 /* 1328 * Match a single peripheral against any number of match patterns. 1329 */ 1330 static dev_match_ret 1331 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1332 struct cam_periph *periph) 1333 { 1334 dev_match_ret retval; 1335 int i; 1336 1337 /* 1338 * If we aren't given something to match against, that's an error. 1339 */ 1340 if (periph == NULL) 1341 return(DM_RET_ERROR); 1342 1343 /* 1344 * If there are no match entries, then this peripheral matches no 1345 * matter what. 1346 */ 1347 if ((patterns == NULL) || (num_patterns == 0)) 1348 return(DM_RET_STOP | DM_RET_COPY); 1349 1350 /* 1351 * There aren't any nodes below a peripheral node, so there's no 1352 * reason to descend the tree any further. 1353 */ 1354 retval = DM_RET_STOP; 1355 1356 for (i = 0; i < num_patterns; i++) { 1357 struct periph_match_pattern *cur_pattern; 1358 1359 /* 1360 * If the pattern in question isn't for a peripheral, we 1361 * aren't interested. 1362 */ 1363 if (patterns[i].type != DEV_MATCH_PERIPH) 1364 continue; 1365 1366 cur_pattern = &patterns[i].pattern.periph_pattern; 1367 1368 /* 1369 * If they want to match on anything, then we will do so. 1370 */ 1371 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1372 /* set the copy flag */ 1373 retval |= DM_RET_COPY; 1374 1375 /* 1376 * We've already set the return action to stop, 1377 * since there are no nodes below peripherals in 1378 * the tree. 1379 */ 1380 return(retval); 1381 } 1382 1383 /* 1384 * Not sure why someone would do this... 1385 */ 1386 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1387 continue; 1388 1389 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1390 && (cur_pattern->path_id != periph->path->bus->path_id)) 1391 continue; 1392 1393 /* 1394 * For the target and lun id's, we have to make sure the 1395 * target and lun pointers aren't NULL. The xpt peripheral 1396 * has a wildcard target and device. 1397 */ 1398 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1399 && ((periph->path->target == NULL) 1400 ||(cur_pattern->target_id != periph->path->target->target_id))) 1401 continue; 1402 1403 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1404 && ((periph->path->device == NULL) 1405 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1406 continue; 1407 1408 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1409 && (cur_pattern->unit_number != periph->unit_number)) 1410 continue; 1411 1412 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1413 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1414 DEV_IDLEN) != 0)) 1415 continue; 1416 1417 /* 1418 * If we get to this point, the user definitely wants 1419 * information on this peripheral. So tell the caller to 1420 * copy the data out. 1421 */ 1422 retval |= DM_RET_COPY; 1423 1424 /* 1425 * The return action has already been set to stop, since 1426 * peripherals don't have any nodes below them in the EDT. 1427 */ 1428 return(retval); 1429 } 1430 1431 /* 1432 * If we get to this point, the peripheral that was passed in 1433 * doesn't match any of the patterns. 1434 */ 1435 return(retval); 1436 } 1437 1438 static int 1439 xptedtbusfunc(struct cam_eb *bus, void *arg) 1440 { 1441 struct ccb_dev_match *cdm; 1442 dev_match_ret retval; 1443 1444 cdm = (struct ccb_dev_match *)arg; 1445 1446 /* 1447 * If our position is for something deeper in the tree, that means 1448 * that we've already seen this node. So, we keep going down. 1449 */ 1450 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1451 && (cdm->pos.cookie.bus == bus) 1452 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1453 && (cdm->pos.cookie.target != NULL)) 1454 retval = DM_RET_DESCEND; 1455 else 1456 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1457 1458 /* 1459 * If we got an error, bail out of the search. 1460 */ 1461 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1462 cdm->status = CAM_DEV_MATCH_ERROR; 1463 return(0); 1464 } 1465 1466 /* 1467 * If the copy flag is set, copy this bus out. 1468 */ 1469 if (retval & DM_RET_COPY) { 1470 int spaceleft, j; 1471 1472 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1473 sizeof(struct dev_match_result)); 1474 1475 /* 1476 * If we don't have enough space to put in another 1477 * match result, save our position and tell the 1478 * user there are more devices to check. 1479 */ 1480 if (spaceleft < sizeof(struct dev_match_result)) { 1481 bzero(&cdm->pos, sizeof(cdm->pos)); 1482 cdm->pos.position_type = 1483 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1484 1485 cdm->pos.cookie.bus = bus; 1486 cdm->pos.generations[CAM_BUS_GENERATION]= 1487 xsoftc.bus_generation; 1488 cdm->status = CAM_DEV_MATCH_MORE; 1489 return(0); 1490 } 1491 j = cdm->num_matches; 1492 cdm->num_matches++; 1493 cdm->matches[j].type = DEV_MATCH_BUS; 1494 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1495 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1496 cdm->matches[j].result.bus_result.unit_number = 1497 bus->sim->unit_number; 1498 strncpy(cdm->matches[j].result.bus_result.dev_name, 1499 bus->sim->sim_name, DEV_IDLEN); 1500 } 1501 1502 /* 1503 * If the user is only interested in busses, there's no 1504 * reason to descend to the next level in the tree. 1505 */ 1506 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1507 return(1); 1508 1509 /* 1510 * If there is a target generation recorded, check it to 1511 * make sure the target list hasn't changed. 1512 */ 1513 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1514 && (bus == cdm->pos.cookie.bus) 1515 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1516 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1517 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1518 bus->generation)) { 1519 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1520 return(0); 1521 } 1522 1523 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1524 && (cdm->pos.cookie.bus == bus) 1525 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1526 && (cdm->pos.cookie.target != NULL)) 1527 return(xpttargettraverse(bus, 1528 (struct cam_et *)cdm->pos.cookie.target, 1529 xptedttargetfunc, arg)); 1530 else 1531 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1532 } 1533 1534 static int 1535 xptedttargetfunc(struct cam_et *target, void *arg) 1536 { 1537 struct ccb_dev_match *cdm; 1538 1539 cdm = (struct ccb_dev_match *)arg; 1540 1541 /* 1542 * If there is a device list generation recorded, check it to 1543 * make sure the device list hasn't changed. 1544 */ 1545 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1546 && (cdm->pos.cookie.bus == target->bus) 1547 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1548 && (cdm->pos.cookie.target == target) 1549 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1550 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1551 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1552 target->generation)) { 1553 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1554 return(0); 1555 } 1556 1557 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1558 && (cdm->pos.cookie.bus == target->bus) 1559 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1560 && (cdm->pos.cookie.target == target) 1561 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1562 && (cdm->pos.cookie.device != NULL)) 1563 return(xptdevicetraverse(target, 1564 (struct cam_ed *)cdm->pos.cookie.device, 1565 xptedtdevicefunc, arg)); 1566 else 1567 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 1568 } 1569 1570 static int 1571 xptedtdevicefunc(struct cam_ed *device, void *arg) 1572 { 1573 1574 struct ccb_dev_match *cdm; 1575 dev_match_ret retval; 1576 1577 cdm = (struct ccb_dev_match *)arg; 1578 1579 /* 1580 * If our position is for something deeper in the tree, that means 1581 * that we've already seen this node. So, we keep going down. 1582 */ 1583 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1584 && (cdm->pos.cookie.device == device) 1585 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1586 && (cdm->pos.cookie.periph != NULL)) 1587 retval = DM_RET_DESCEND; 1588 else 1589 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1590 device); 1591 1592 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1593 cdm->status = CAM_DEV_MATCH_ERROR; 1594 return(0); 1595 } 1596 1597 /* 1598 * If the copy flag is set, copy this device out. 1599 */ 1600 if (retval & DM_RET_COPY) { 1601 int spaceleft, j; 1602 1603 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1604 sizeof(struct dev_match_result)); 1605 1606 /* 1607 * If we don't have enough space to put in another 1608 * match result, save our position and tell the 1609 * user there are more devices to check. 1610 */ 1611 if (spaceleft < sizeof(struct dev_match_result)) { 1612 bzero(&cdm->pos, sizeof(cdm->pos)); 1613 cdm->pos.position_type = 1614 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1615 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1616 1617 cdm->pos.cookie.bus = device->target->bus; 1618 cdm->pos.generations[CAM_BUS_GENERATION]= 1619 xsoftc.bus_generation; 1620 cdm->pos.cookie.target = device->target; 1621 cdm->pos.generations[CAM_TARGET_GENERATION] = 1622 device->target->bus->generation; 1623 cdm->pos.cookie.device = device; 1624 cdm->pos.generations[CAM_DEV_GENERATION] = 1625 device->target->generation; 1626 cdm->status = CAM_DEV_MATCH_MORE; 1627 return(0); 1628 } 1629 j = cdm->num_matches; 1630 cdm->num_matches++; 1631 cdm->matches[j].type = DEV_MATCH_DEVICE; 1632 cdm->matches[j].result.device_result.path_id = 1633 device->target->bus->path_id; 1634 cdm->matches[j].result.device_result.target_id = 1635 device->target->target_id; 1636 cdm->matches[j].result.device_result.target_lun = 1637 device->lun_id; 1638 cdm->matches[j].result.device_result.protocol = 1639 device->protocol; 1640 bcopy(&device->inq_data, 1641 &cdm->matches[j].result.device_result.inq_data, 1642 sizeof(struct scsi_inquiry_data)); 1643 bcopy(&device->ident_data, 1644 &cdm->matches[j].result.device_result.ident_data, 1645 sizeof(struct ata_params)); 1646 1647 /* Let the user know whether this device is unconfigured */ 1648 if (device->flags & CAM_DEV_UNCONFIGURED) 1649 cdm->matches[j].result.device_result.flags = 1650 DEV_RESULT_UNCONFIGURED; 1651 else 1652 cdm->matches[j].result.device_result.flags = 1653 DEV_RESULT_NOFLAG; 1654 } 1655 1656 /* 1657 * If the user isn't interested in peripherals, don't descend 1658 * the tree any further. 1659 */ 1660 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1661 return(1); 1662 1663 /* 1664 * If there is a peripheral list generation recorded, make sure 1665 * it hasn't changed. 1666 */ 1667 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1668 && (device->target->bus == cdm->pos.cookie.bus) 1669 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1670 && (device->target == cdm->pos.cookie.target) 1671 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1672 && (device == cdm->pos.cookie.device) 1673 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1674 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1675 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1676 device->generation)){ 1677 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1678 return(0); 1679 } 1680 1681 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1682 && (cdm->pos.cookie.bus == device->target->bus) 1683 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1684 && (cdm->pos.cookie.target == device->target) 1685 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1686 && (cdm->pos.cookie.device == device) 1687 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1688 && (cdm->pos.cookie.periph != NULL)) 1689 return(xptperiphtraverse(device, 1690 (struct cam_periph *)cdm->pos.cookie.periph, 1691 xptedtperiphfunc, arg)); 1692 else 1693 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 1694 } 1695 1696 static int 1697 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1698 { 1699 struct ccb_dev_match *cdm; 1700 dev_match_ret retval; 1701 1702 cdm = (struct ccb_dev_match *)arg; 1703 1704 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1705 1706 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1707 cdm->status = CAM_DEV_MATCH_ERROR; 1708 return(0); 1709 } 1710 1711 /* 1712 * If the copy flag is set, copy this peripheral out. 1713 */ 1714 if (retval & DM_RET_COPY) { 1715 int spaceleft, j; 1716 1717 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1718 sizeof(struct dev_match_result)); 1719 1720 /* 1721 * If we don't have enough space to put in another 1722 * match result, save our position and tell the 1723 * user there are more devices to check. 1724 */ 1725 if (spaceleft < sizeof(struct dev_match_result)) { 1726 bzero(&cdm->pos, sizeof(cdm->pos)); 1727 cdm->pos.position_type = 1728 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1729 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1730 CAM_DEV_POS_PERIPH; 1731 1732 cdm->pos.cookie.bus = periph->path->bus; 1733 cdm->pos.generations[CAM_BUS_GENERATION]= 1734 xsoftc.bus_generation; 1735 cdm->pos.cookie.target = periph->path->target; 1736 cdm->pos.generations[CAM_TARGET_GENERATION] = 1737 periph->path->bus->generation; 1738 cdm->pos.cookie.device = periph->path->device; 1739 cdm->pos.generations[CAM_DEV_GENERATION] = 1740 periph->path->target->generation; 1741 cdm->pos.cookie.periph = periph; 1742 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1743 periph->path->device->generation; 1744 cdm->status = CAM_DEV_MATCH_MORE; 1745 return(0); 1746 } 1747 1748 j = cdm->num_matches; 1749 cdm->num_matches++; 1750 cdm->matches[j].type = DEV_MATCH_PERIPH; 1751 cdm->matches[j].result.periph_result.path_id = 1752 periph->path->bus->path_id; 1753 cdm->matches[j].result.periph_result.target_id = 1754 periph->path->target->target_id; 1755 cdm->matches[j].result.periph_result.target_lun = 1756 periph->path->device->lun_id; 1757 cdm->matches[j].result.periph_result.unit_number = 1758 periph->unit_number; 1759 strncpy(cdm->matches[j].result.periph_result.periph_name, 1760 periph->periph_name, DEV_IDLEN); 1761 } 1762 1763 return(1); 1764 } 1765 1766 static int 1767 xptedtmatch(struct ccb_dev_match *cdm) 1768 { 1769 int ret; 1770 1771 cdm->num_matches = 0; 1772 1773 /* 1774 * Check the bus list generation. If it has changed, the user 1775 * needs to reset everything and start over. 1776 */ 1777 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1778 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 1779 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 1780 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1781 return(0); 1782 } 1783 1784 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1785 && (cdm->pos.cookie.bus != NULL)) 1786 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 1787 xptedtbusfunc, cdm); 1788 else 1789 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 1790 1791 /* 1792 * If we get back 0, that means that we had to stop before fully 1793 * traversing the EDT. It also means that one of the subroutines 1794 * has set the status field to the proper value. If we get back 1, 1795 * we've fully traversed the EDT and copied out any matching entries. 1796 */ 1797 if (ret == 1) 1798 cdm->status = CAM_DEV_MATCH_LAST; 1799 1800 return(ret); 1801 } 1802 1803 static int 1804 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1805 { 1806 struct ccb_dev_match *cdm; 1807 1808 cdm = (struct ccb_dev_match *)arg; 1809 1810 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1811 && (cdm->pos.cookie.pdrv == pdrv) 1812 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1813 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1814 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1815 (*pdrv)->generation)) { 1816 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1817 return(0); 1818 } 1819 1820 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1821 && (cdm->pos.cookie.pdrv == pdrv) 1822 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1823 && (cdm->pos.cookie.periph != NULL)) 1824 return(xptpdperiphtraverse(pdrv, 1825 (struct cam_periph *)cdm->pos.cookie.periph, 1826 xptplistperiphfunc, arg)); 1827 else 1828 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 1829 } 1830 1831 static int 1832 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1833 { 1834 struct ccb_dev_match *cdm; 1835 dev_match_ret retval; 1836 1837 cdm = (struct ccb_dev_match *)arg; 1838 1839 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1840 1841 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1842 cdm->status = CAM_DEV_MATCH_ERROR; 1843 return(0); 1844 } 1845 1846 /* 1847 * If the copy flag is set, copy this peripheral out. 1848 */ 1849 if (retval & DM_RET_COPY) { 1850 int spaceleft, j; 1851 1852 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1853 sizeof(struct dev_match_result)); 1854 1855 /* 1856 * If we don't have enough space to put in another 1857 * match result, save our position and tell the 1858 * user there are more devices to check. 1859 */ 1860 if (spaceleft < sizeof(struct dev_match_result)) { 1861 struct periph_driver **pdrv; 1862 1863 pdrv = NULL; 1864 bzero(&cdm->pos, sizeof(cdm->pos)); 1865 cdm->pos.position_type = 1866 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1867 CAM_DEV_POS_PERIPH; 1868 1869 /* 1870 * This may look a bit non-sensical, but it is 1871 * actually quite logical. There are very few 1872 * peripheral drivers, and bloating every peripheral 1873 * structure with a pointer back to its parent 1874 * peripheral driver linker set entry would cost 1875 * more in the long run than doing this quick lookup. 1876 */ 1877 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 1878 if (strcmp((*pdrv)->driver_name, 1879 periph->periph_name) == 0) 1880 break; 1881 } 1882 1883 if (*pdrv == NULL) { 1884 cdm->status = CAM_DEV_MATCH_ERROR; 1885 return(0); 1886 } 1887 1888 cdm->pos.cookie.pdrv = pdrv; 1889 /* 1890 * The periph generation slot does double duty, as 1891 * does the periph pointer slot. They are used for 1892 * both edt and pdrv lookups and positioning. 1893 */ 1894 cdm->pos.cookie.periph = periph; 1895 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1896 (*pdrv)->generation; 1897 cdm->status = CAM_DEV_MATCH_MORE; 1898 return(0); 1899 } 1900 1901 j = cdm->num_matches; 1902 cdm->num_matches++; 1903 cdm->matches[j].type = DEV_MATCH_PERIPH; 1904 cdm->matches[j].result.periph_result.path_id = 1905 periph->path->bus->path_id; 1906 1907 /* 1908 * The transport layer peripheral doesn't have a target or 1909 * lun. 1910 */ 1911 if (periph->path->target) 1912 cdm->matches[j].result.periph_result.target_id = 1913 periph->path->target->target_id; 1914 else 1915 cdm->matches[j].result.periph_result.target_id = -1; 1916 1917 if (periph->path->device) 1918 cdm->matches[j].result.periph_result.target_lun = 1919 periph->path->device->lun_id; 1920 else 1921 cdm->matches[j].result.periph_result.target_lun = -1; 1922 1923 cdm->matches[j].result.periph_result.unit_number = 1924 periph->unit_number; 1925 strncpy(cdm->matches[j].result.periph_result.periph_name, 1926 periph->periph_name, DEV_IDLEN); 1927 } 1928 1929 return(1); 1930 } 1931 1932 static int 1933 xptperiphlistmatch(struct ccb_dev_match *cdm) 1934 { 1935 int ret; 1936 1937 cdm->num_matches = 0; 1938 1939 /* 1940 * At this point in the edt traversal function, we check the bus 1941 * list generation to make sure that no busses have been added or 1942 * removed since the user last sent a XPT_DEV_MATCH ccb through. 1943 * For the peripheral driver list traversal function, however, we 1944 * don't have to worry about new peripheral driver types coming or 1945 * going; they're in a linker set, and therefore can't change 1946 * without a recompile. 1947 */ 1948 1949 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1950 && (cdm->pos.cookie.pdrv != NULL)) 1951 ret = xptpdrvtraverse( 1952 (struct periph_driver **)cdm->pos.cookie.pdrv, 1953 xptplistpdrvfunc, cdm); 1954 else 1955 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 1956 1957 /* 1958 * If we get back 0, that means that we had to stop before fully 1959 * traversing the peripheral driver tree. It also means that one of 1960 * the subroutines has set the status field to the proper value. If 1961 * we get back 1, we've fully traversed the EDT and copied out any 1962 * matching entries. 1963 */ 1964 if (ret == 1) 1965 cdm->status = CAM_DEV_MATCH_LAST; 1966 1967 return(ret); 1968 } 1969 1970 static int 1971 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 1972 { 1973 struct cam_eb *bus, *next_bus; 1974 int retval; 1975 1976 retval = 1; 1977 1978 mtx_lock(&xsoftc.xpt_topo_lock); 1979 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 1980 bus != NULL; 1981 bus = next_bus) { 1982 1983 bus->refcount++; 1984 1985 /* 1986 * XXX The locking here is obviously very complex. We 1987 * should work to simplify it. 1988 */ 1989 mtx_unlock(&xsoftc.xpt_topo_lock); 1990 CAM_SIM_LOCK(bus->sim); 1991 retval = tr_func(bus, arg); 1992 CAM_SIM_UNLOCK(bus->sim); 1993 1994 mtx_lock(&xsoftc.xpt_topo_lock); 1995 next_bus = TAILQ_NEXT(bus, links); 1996 mtx_unlock(&xsoftc.xpt_topo_lock); 1997 1998 xpt_release_bus(bus); 1999 2000 if (retval == 0) 2001 return(retval); 2002 mtx_lock(&xsoftc.xpt_topo_lock); 2003 } 2004 mtx_unlock(&xsoftc.xpt_topo_lock); 2005 2006 return(retval); 2007 } 2008 2009 int 2010 xpt_sim_opened(struct cam_sim *sim) 2011 { 2012 struct cam_eb *bus; 2013 struct cam_et *target; 2014 struct cam_ed *device; 2015 struct cam_periph *periph; 2016 2017 KASSERT(sim->refcount >= 1, ("sim->refcount >= 1")); 2018 mtx_assert(sim->mtx, MA_OWNED); 2019 2020 mtx_lock(&xsoftc.xpt_topo_lock); 2021 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 2022 if (bus->sim != sim) 2023 continue; 2024 2025 TAILQ_FOREACH(target, &bus->et_entries, links) { 2026 TAILQ_FOREACH(device, &target->ed_entries, links) { 2027 SLIST_FOREACH(periph, &device->periphs, 2028 periph_links) { 2029 if (periph->refcount > 0) { 2030 mtx_unlock(&xsoftc.xpt_topo_lock); 2031 return (1); 2032 } 2033 } 2034 } 2035 } 2036 } 2037 2038 mtx_unlock(&xsoftc.xpt_topo_lock); 2039 return (0); 2040 } 2041 2042 static int 2043 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2044 xpt_targetfunc_t *tr_func, void *arg) 2045 { 2046 struct cam_et *target, *next_target; 2047 int retval; 2048 2049 retval = 1; 2050 for (target = (start_target ? start_target : 2051 TAILQ_FIRST(&bus->et_entries)); 2052 target != NULL; target = next_target) { 2053 2054 target->refcount++; 2055 2056 retval = tr_func(target, arg); 2057 2058 next_target = TAILQ_NEXT(target, links); 2059 2060 xpt_release_target(target); 2061 2062 if (retval == 0) 2063 return(retval); 2064 } 2065 2066 return(retval); 2067 } 2068 2069 static int 2070 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2071 xpt_devicefunc_t *tr_func, void *arg) 2072 { 2073 struct cam_ed *device, *next_device; 2074 int retval; 2075 2076 retval = 1; 2077 for (device = (start_device ? start_device : 2078 TAILQ_FIRST(&target->ed_entries)); 2079 device != NULL; 2080 device = next_device) { 2081 2082 /* 2083 * Hold a reference so the current device does not go away 2084 * on us. 2085 */ 2086 device->refcount++; 2087 2088 retval = tr_func(device, arg); 2089 2090 /* 2091 * Grab our next pointer before we release the current 2092 * device. 2093 */ 2094 next_device = TAILQ_NEXT(device, links); 2095 2096 xpt_release_device(device); 2097 2098 if (retval == 0) 2099 return(retval); 2100 } 2101 2102 return(retval); 2103 } 2104 2105 static int 2106 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2107 xpt_periphfunc_t *tr_func, void *arg) 2108 { 2109 struct cam_periph *periph, *next_periph; 2110 int retval; 2111 2112 retval = 1; 2113 2114 xpt_lock_buses(); 2115 for (periph = (start_periph ? start_periph : 2116 SLIST_FIRST(&device->periphs)); 2117 periph != NULL; 2118 periph = next_periph) { 2119 2120 2121 /* 2122 * In this case, we want to show peripherals that have been 2123 * invalidated, but not peripherals that are scheduled to 2124 * be freed. So instead of calling cam_periph_acquire(), 2125 * which will fail if the periph has been invalidated, we 2126 * just check for the free flag here. If it is free, we 2127 * skip to the next periph. 2128 */ 2129 if (periph->flags & CAM_PERIPH_FREE) { 2130 next_periph = SLIST_NEXT(periph, periph_links); 2131 continue; 2132 } 2133 2134 /* 2135 * Acquire a reference to this periph while we call the 2136 * traversal function, so it can't go away. 2137 */ 2138 periph->refcount++; 2139 2140 xpt_unlock_buses(); 2141 2142 retval = tr_func(periph, arg); 2143 2144 /* 2145 * We need the lock for list traversal. 2146 */ 2147 xpt_lock_buses(); 2148 2149 /* 2150 * Grab the next peripheral before we release this one, so 2151 * our next pointer is still valid. 2152 */ 2153 next_periph = SLIST_NEXT(periph, periph_links); 2154 2155 cam_periph_release_locked_buses(periph); 2156 2157 if (retval == 0) 2158 goto bailout_done; 2159 } 2160 2161 bailout_done: 2162 2163 xpt_unlock_buses(); 2164 2165 return(retval); 2166 } 2167 2168 static int 2169 xptpdrvtraverse(struct periph_driver **start_pdrv, 2170 xpt_pdrvfunc_t *tr_func, void *arg) 2171 { 2172 struct periph_driver **pdrv; 2173 int retval; 2174 2175 retval = 1; 2176 2177 /* 2178 * We don't traverse the peripheral driver list like we do the 2179 * other lists, because it is a linker set, and therefore cannot be 2180 * changed during runtime. If the peripheral driver list is ever 2181 * re-done to be something other than a linker set (i.e. it can 2182 * change while the system is running), the list traversal should 2183 * be modified to work like the other traversal functions. 2184 */ 2185 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2186 *pdrv != NULL; pdrv++) { 2187 retval = tr_func(pdrv, arg); 2188 2189 if (retval == 0) 2190 return(retval); 2191 } 2192 2193 return(retval); 2194 } 2195 2196 static int 2197 xptpdperiphtraverse(struct periph_driver **pdrv, 2198 struct cam_periph *start_periph, 2199 xpt_periphfunc_t *tr_func, void *arg) 2200 { 2201 struct cam_periph *periph, *next_periph; 2202 int retval; 2203 2204 retval = 1; 2205 2206 xpt_lock_buses(); 2207 for (periph = (start_periph ? start_periph : 2208 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2209 periph = next_periph) { 2210 2211 2212 /* 2213 * In this case, we want to show peripherals that have been 2214 * invalidated, but not peripherals that are scheduled to 2215 * be freed. So instead of calling cam_periph_acquire(), 2216 * which will fail if the periph has been invalidated, we 2217 * just check for the free flag here. If it is free, we 2218 * skip to the next periph. 2219 */ 2220 if (periph->flags & CAM_PERIPH_FREE) { 2221 next_periph = TAILQ_NEXT(periph, unit_links); 2222 continue; 2223 } 2224 2225 /* 2226 * Acquire a reference to this periph while we call the 2227 * traversal function, so it can't go away. 2228 */ 2229 periph->refcount++; 2230 2231 /* 2232 * XXX KDM we have the toplogy lock here, but in 2233 * xptperiphtraverse(), we drop it before calling the 2234 * traversal function. Which is correct? 2235 */ 2236 retval = tr_func(periph, arg); 2237 2238 /* 2239 * Grab the next peripheral before we release this one, so 2240 * our next pointer is still valid. 2241 */ 2242 next_periph = TAILQ_NEXT(periph, unit_links); 2243 2244 cam_periph_release_locked_buses(periph); 2245 2246 if (retval == 0) 2247 goto bailout_done; 2248 } 2249 bailout_done: 2250 2251 xpt_unlock_buses(); 2252 2253 return(retval); 2254 } 2255 2256 static int 2257 xptdefbusfunc(struct cam_eb *bus, void *arg) 2258 { 2259 struct xpt_traverse_config *tr_config; 2260 2261 tr_config = (struct xpt_traverse_config *)arg; 2262 2263 if (tr_config->depth == XPT_DEPTH_BUS) { 2264 xpt_busfunc_t *tr_func; 2265 2266 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2267 2268 return(tr_func(bus, tr_config->tr_arg)); 2269 } else 2270 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2271 } 2272 2273 static int 2274 xptdeftargetfunc(struct cam_et *target, void *arg) 2275 { 2276 struct xpt_traverse_config *tr_config; 2277 2278 tr_config = (struct xpt_traverse_config *)arg; 2279 2280 if (tr_config->depth == XPT_DEPTH_TARGET) { 2281 xpt_targetfunc_t *tr_func; 2282 2283 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2284 2285 return(tr_func(target, tr_config->tr_arg)); 2286 } else 2287 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2288 } 2289 2290 static int 2291 xptdefdevicefunc(struct cam_ed *device, void *arg) 2292 { 2293 struct xpt_traverse_config *tr_config; 2294 2295 tr_config = (struct xpt_traverse_config *)arg; 2296 2297 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2298 xpt_devicefunc_t *tr_func; 2299 2300 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2301 2302 return(tr_func(device, tr_config->tr_arg)); 2303 } else 2304 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2305 } 2306 2307 static int 2308 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2309 { 2310 struct xpt_traverse_config *tr_config; 2311 xpt_periphfunc_t *tr_func; 2312 2313 tr_config = (struct xpt_traverse_config *)arg; 2314 2315 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2316 2317 /* 2318 * Unlike the other default functions, we don't check for depth 2319 * here. The peripheral driver level is the last level in the EDT, 2320 * so if we're here, we should execute the function in question. 2321 */ 2322 return(tr_func(periph, tr_config->tr_arg)); 2323 } 2324 2325 /* 2326 * Execute the given function for every bus in the EDT. 2327 */ 2328 static int 2329 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2330 { 2331 struct xpt_traverse_config tr_config; 2332 2333 tr_config.depth = XPT_DEPTH_BUS; 2334 tr_config.tr_func = tr_func; 2335 tr_config.tr_arg = arg; 2336 2337 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2338 } 2339 2340 /* 2341 * Execute the given function for every device in the EDT. 2342 */ 2343 static int 2344 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2345 { 2346 struct xpt_traverse_config tr_config; 2347 2348 tr_config.depth = XPT_DEPTH_DEVICE; 2349 tr_config.tr_func = tr_func; 2350 tr_config.tr_arg = arg; 2351 2352 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2353 } 2354 2355 static int 2356 xptsetasyncfunc(struct cam_ed *device, void *arg) 2357 { 2358 struct cam_path path; 2359 struct ccb_getdev cgd; 2360 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2361 2362 /* 2363 * Don't report unconfigured devices (Wildcard devs, 2364 * devices only for target mode, device instances 2365 * that have been invalidated but are waiting for 2366 * their last reference count to be released). 2367 */ 2368 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2369 return (1); 2370 2371 xpt_compile_path(&path, 2372 NULL, 2373 device->target->bus->path_id, 2374 device->target->target_id, 2375 device->lun_id); 2376 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2377 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2378 xpt_action((union ccb *)&cgd); 2379 csa->callback(csa->callback_arg, 2380 AC_FOUND_DEVICE, 2381 &path, &cgd); 2382 xpt_release_path(&path); 2383 2384 return(1); 2385 } 2386 2387 static int 2388 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2389 { 2390 struct cam_path path; 2391 struct ccb_pathinq cpi; 2392 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2393 2394 xpt_compile_path(&path, /*periph*/NULL, 2395 bus->sim->path_id, 2396 CAM_TARGET_WILDCARD, 2397 CAM_LUN_WILDCARD); 2398 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2399 cpi.ccb_h.func_code = XPT_PATH_INQ; 2400 xpt_action((union ccb *)&cpi); 2401 csa->callback(csa->callback_arg, 2402 AC_PATH_REGISTERED, 2403 &path, &cpi); 2404 xpt_release_path(&path); 2405 2406 return(1); 2407 } 2408 2409 void 2410 xpt_action(union ccb *start_ccb) 2411 { 2412 2413 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2414 2415 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2416 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2417 } 2418 2419 void 2420 xpt_action_default(union ccb *start_ccb) 2421 { 2422 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2423 struct cam_path *path; 2424 2425 path = start_ccb->ccb_h.path; 2426 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2427 2428 switch (start_ccb->ccb_h.func_code) { 2429 case XPT_SCSI_IO: 2430 { 2431 struct cam_ed *device; 2432 2433 /* 2434 * For the sake of compatibility with SCSI-1 2435 * devices that may not understand the identify 2436 * message, we include lun information in the 2437 * second byte of all commands. SCSI-1 specifies 2438 * that luns are a 3 bit value and reserves only 3 2439 * bits for lun information in the CDB. Later 2440 * revisions of the SCSI spec allow for more than 8 2441 * luns, but have deprecated lun information in the 2442 * CDB. So, if the lun won't fit, we must omit. 2443 * 2444 * Also be aware that during initial probing for devices, 2445 * the inquiry information is unknown but initialized to 0. 2446 * This means that this code will be exercised while probing 2447 * devices with an ANSI revision greater than 2. 2448 */ 2449 device = path->device; 2450 if (device->protocol_version <= SCSI_REV_2 2451 && start_ccb->ccb_h.target_lun < 8 2452 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2453 2454 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2455 start_ccb->ccb_h.target_lun << 5; 2456 } 2457 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2458 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2459 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2460 &path->device->inq_data), 2461 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2462 cdb_str, sizeof(cdb_str)))); 2463 } 2464 /* FALLTHROUGH */ 2465 case XPT_TARGET_IO: 2466 case XPT_CONT_TARGET_IO: 2467 start_ccb->csio.sense_resid = 0; 2468 start_ccb->csio.resid = 0; 2469 /* FALLTHROUGH */ 2470 case XPT_ATA_IO: 2471 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) { 2472 start_ccb->ataio.resid = 0; 2473 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. ACB: %s\n", 2474 ata_op_string(&start_ccb->ataio.cmd), 2475 ata_cmd_string(&start_ccb->ataio.cmd, 2476 cdb_str, sizeof(cdb_str)))); 2477 } 2478 /* FALLTHROUGH */ 2479 case XPT_RESET_DEV: 2480 case XPT_ENG_EXEC: 2481 { 2482 int frozen; 2483 2484 frozen = cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2485 path->device->sim->devq->alloc_openings += frozen; 2486 if (frozen > 0) 2487 xpt_run_dev_allocq(path->bus); 2488 if (xpt_schedule_dev_sendq(path->bus, path->device)) 2489 xpt_run_dev_sendq(path->bus); 2490 break; 2491 } 2492 case XPT_CALC_GEOMETRY: 2493 { 2494 struct cam_sim *sim; 2495 2496 /* Filter out garbage */ 2497 if (start_ccb->ccg.block_size == 0 2498 || start_ccb->ccg.volume_size == 0) { 2499 start_ccb->ccg.cylinders = 0; 2500 start_ccb->ccg.heads = 0; 2501 start_ccb->ccg.secs_per_track = 0; 2502 start_ccb->ccb_h.status = CAM_REQ_CMP; 2503 break; 2504 } 2505 #if defined(PC98) || defined(__sparc64__) 2506 /* 2507 * In a PC-98 system, geometry translation depens on 2508 * the "real" device geometry obtained from mode page 4. 2509 * SCSI geometry translation is performed in the 2510 * initialization routine of the SCSI BIOS and the result 2511 * stored in host memory. If the translation is available 2512 * in host memory, use it. If not, rely on the default 2513 * translation the device driver performs. 2514 * For sparc64, we may need adjust the geometry of large 2515 * disks in order to fit the limitations of the 16-bit 2516 * fields of the VTOC8 disk label. 2517 */ 2518 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2519 start_ccb->ccb_h.status = CAM_REQ_CMP; 2520 break; 2521 } 2522 #endif 2523 sim = path->bus->sim; 2524 (*(sim->sim_action))(sim, start_ccb); 2525 break; 2526 } 2527 case XPT_ABORT: 2528 { 2529 union ccb* abort_ccb; 2530 2531 abort_ccb = start_ccb->cab.abort_ccb; 2532 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2533 2534 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2535 struct cam_ccbq *ccbq; 2536 struct cam_ed *device; 2537 2538 device = abort_ccb->ccb_h.path->device; 2539 ccbq = &device->ccbq; 2540 device->sim->devq->alloc_openings -= 2541 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2542 abort_ccb->ccb_h.status = 2543 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2544 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2545 xpt_done(abort_ccb); 2546 start_ccb->ccb_h.status = CAM_REQ_CMP; 2547 break; 2548 } 2549 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2550 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2551 /* 2552 * We've caught this ccb en route to 2553 * the SIM. Flag it for abort and the 2554 * SIM will do so just before starting 2555 * real work on the CCB. 2556 */ 2557 abort_ccb->ccb_h.status = 2558 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2559 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2560 start_ccb->ccb_h.status = CAM_REQ_CMP; 2561 break; 2562 } 2563 } 2564 if (XPT_FC_IS_QUEUED(abort_ccb) 2565 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2566 /* 2567 * It's already completed but waiting 2568 * for our SWI to get to it. 2569 */ 2570 start_ccb->ccb_h.status = CAM_UA_ABORT; 2571 break; 2572 } 2573 /* 2574 * If we weren't able to take care of the abort request 2575 * in the XPT, pass the request down to the SIM for processing. 2576 */ 2577 } 2578 /* FALLTHROUGH */ 2579 case XPT_ACCEPT_TARGET_IO: 2580 case XPT_EN_LUN: 2581 case XPT_IMMED_NOTIFY: 2582 case XPT_NOTIFY_ACK: 2583 case XPT_RESET_BUS: 2584 case XPT_IMMEDIATE_NOTIFY: 2585 case XPT_NOTIFY_ACKNOWLEDGE: 2586 case XPT_GET_SIM_KNOB: 2587 case XPT_SET_SIM_KNOB: 2588 { 2589 struct cam_sim *sim; 2590 2591 sim = path->bus->sim; 2592 (*(sim->sim_action))(sim, start_ccb); 2593 break; 2594 } 2595 case XPT_PATH_INQ: 2596 { 2597 struct cam_sim *sim; 2598 2599 sim = path->bus->sim; 2600 (*(sim->sim_action))(sim, start_ccb); 2601 break; 2602 } 2603 case XPT_PATH_STATS: 2604 start_ccb->cpis.last_reset = path->bus->last_reset; 2605 start_ccb->ccb_h.status = CAM_REQ_CMP; 2606 break; 2607 case XPT_GDEV_TYPE: 2608 { 2609 struct cam_ed *dev; 2610 2611 dev = path->device; 2612 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2613 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2614 } else { 2615 struct ccb_getdev *cgd; 2616 2617 cgd = &start_ccb->cgd; 2618 cgd->protocol = dev->protocol; 2619 cgd->inq_data = dev->inq_data; 2620 cgd->ident_data = dev->ident_data; 2621 cgd->inq_flags = dev->inq_flags; 2622 cgd->ccb_h.status = CAM_REQ_CMP; 2623 cgd->serial_num_len = dev->serial_num_len; 2624 if ((dev->serial_num_len > 0) 2625 && (dev->serial_num != NULL)) 2626 bcopy(dev->serial_num, cgd->serial_num, 2627 dev->serial_num_len); 2628 } 2629 break; 2630 } 2631 case XPT_GDEV_STATS: 2632 { 2633 struct cam_ed *dev; 2634 2635 dev = path->device; 2636 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2637 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2638 } else { 2639 struct ccb_getdevstats *cgds; 2640 struct cam_eb *bus; 2641 struct cam_et *tar; 2642 2643 cgds = &start_ccb->cgds; 2644 bus = path->bus; 2645 tar = path->target; 2646 cgds->dev_openings = dev->ccbq.dev_openings; 2647 cgds->dev_active = dev->ccbq.dev_active; 2648 cgds->devq_openings = dev->ccbq.devq_openings; 2649 cgds->devq_queued = dev->ccbq.queue.entries; 2650 cgds->held = dev->ccbq.held; 2651 cgds->last_reset = tar->last_reset; 2652 cgds->maxtags = dev->maxtags; 2653 cgds->mintags = dev->mintags; 2654 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2655 cgds->last_reset = bus->last_reset; 2656 cgds->ccb_h.status = CAM_REQ_CMP; 2657 } 2658 break; 2659 } 2660 case XPT_GDEVLIST: 2661 { 2662 struct cam_periph *nperiph; 2663 struct periph_list *periph_head; 2664 struct ccb_getdevlist *cgdl; 2665 u_int i; 2666 struct cam_ed *device; 2667 int found; 2668 2669 2670 found = 0; 2671 2672 /* 2673 * Don't want anyone mucking with our data. 2674 */ 2675 device = path->device; 2676 periph_head = &device->periphs; 2677 cgdl = &start_ccb->cgdl; 2678 2679 /* 2680 * Check and see if the list has changed since the user 2681 * last requested a list member. If so, tell them that the 2682 * list has changed, and therefore they need to start over 2683 * from the beginning. 2684 */ 2685 if ((cgdl->index != 0) && 2686 (cgdl->generation != device->generation)) { 2687 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2688 break; 2689 } 2690 2691 /* 2692 * Traverse the list of peripherals and attempt to find 2693 * the requested peripheral. 2694 */ 2695 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2696 (nperiph != NULL) && (i <= cgdl->index); 2697 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2698 if (i == cgdl->index) { 2699 strncpy(cgdl->periph_name, 2700 nperiph->periph_name, 2701 DEV_IDLEN); 2702 cgdl->unit_number = nperiph->unit_number; 2703 found = 1; 2704 } 2705 } 2706 if (found == 0) { 2707 cgdl->status = CAM_GDEVLIST_ERROR; 2708 break; 2709 } 2710 2711 if (nperiph == NULL) 2712 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2713 else 2714 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2715 2716 cgdl->index++; 2717 cgdl->generation = device->generation; 2718 2719 cgdl->ccb_h.status = CAM_REQ_CMP; 2720 break; 2721 } 2722 case XPT_DEV_MATCH: 2723 { 2724 dev_pos_type position_type; 2725 struct ccb_dev_match *cdm; 2726 2727 cdm = &start_ccb->cdm; 2728 2729 /* 2730 * There are two ways of getting at information in the EDT. 2731 * The first way is via the primary EDT tree. It starts 2732 * with a list of busses, then a list of targets on a bus, 2733 * then devices/luns on a target, and then peripherals on a 2734 * device/lun. The "other" way is by the peripheral driver 2735 * lists. The peripheral driver lists are organized by 2736 * peripheral driver. (obviously) So it makes sense to 2737 * use the peripheral driver list if the user is looking 2738 * for something like "da1", or all "da" devices. If the 2739 * user is looking for something on a particular bus/target 2740 * or lun, it's generally better to go through the EDT tree. 2741 */ 2742 2743 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2744 position_type = cdm->pos.position_type; 2745 else { 2746 u_int i; 2747 2748 position_type = CAM_DEV_POS_NONE; 2749 2750 for (i = 0; i < cdm->num_patterns; i++) { 2751 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2752 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2753 position_type = CAM_DEV_POS_EDT; 2754 break; 2755 } 2756 } 2757 2758 if (cdm->num_patterns == 0) 2759 position_type = CAM_DEV_POS_EDT; 2760 else if (position_type == CAM_DEV_POS_NONE) 2761 position_type = CAM_DEV_POS_PDRV; 2762 } 2763 2764 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2765 case CAM_DEV_POS_EDT: 2766 xptedtmatch(cdm); 2767 break; 2768 case CAM_DEV_POS_PDRV: 2769 xptperiphlistmatch(cdm); 2770 break; 2771 default: 2772 cdm->status = CAM_DEV_MATCH_ERROR; 2773 break; 2774 } 2775 2776 if (cdm->status == CAM_DEV_MATCH_ERROR) 2777 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2778 else 2779 start_ccb->ccb_h.status = CAM_REQ_CMP; 2780 2781 break; 2782 } 2783 case XPT_SASYNC_CB: 2784 { 2785 struct ccb_setasync *csa; 2786 struct async_node *cur_entry; 2787 struct async_list *async_head; 2788 u_int32_t added; 2789 2790 csa = &start_ccb->csa; 2791 added = csa->event_enable; 2792 async_head = &path->device->asyncs; 2793 2794 /* 2795 * If there is already an entry for us, simply 2796 * update it. 2797 */ 2798 cur_entry = SLIST_FIRST(async_head); 2799 while (cur_entry != NULL) { 2800 if ((cur_entry->callback_arg == csa->callback_arg) 2801 && (cur_entry->callback == csa->callback)) 2802 break; 2803 cur_entry = SLIST_NEXT(cur_entry, links); 2804 } 2805 2806 if (cur_entry != NULL) { 2807 /* 2808 * If the request has no flags set, 2809 * remove the entry. 2810 */ 2811 added &= ~cur_entry->event_enable; 2812 if (csa->event_enable == 0) { 2813 SLIST_REMOVE(async_head, cur_entry, 2814 async_node, links); 2815 xpt_release_device(path->device); 2816 free(cur_entry, M_CAMXPT); 2817 } else { 2818 cur_entry->event_enable = csa->event_enable; 2819 } 2820 csa->event_enable = added; 2821 } else { 2822 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2823 M_NOWAIT); 2824 if (cur_entry == NULL) { 2825 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2826 break; 2827 } 2828 cur_entry->event_enable = csa->event_enable; 2829 cur_entry->callback_arg = csa->callback_arg; 2830 cur_entry->callback = csa->callback; 2831 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2832 xpt_acquire_device(path->device); 2833 } 2834 start_ccb->ccb_h.status = CAM_REQ_CMP; 2835 break; 2836 } 2837 case XPT_REL_SIMQ: 2838 { 2839 struct ccb_relsim *crs; 2840 struct cam_ed *dev; 2841 2842 crs = &start_ccb->crs; 2843 dev = path->device; 2844 if (dev == NULL) { 2845 2846 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2847 break; 2848 } 2849 2850 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2851 2852 /* Don't ever go below one opening */ 2853 if (crs->openings > 0) { 2854 xpt_dev_ccbq_resize(path, crs->openings); 2855 if (bootverbose) { 2856 xpt_print(path, 2857 "number of openings is now %d\n", 2858 crs->openings); 2859 } 2860 } 2861 } 2862 2863 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2864 2865 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2866 2867 /* 2868 * Just extend the old timeout and decrement 2869 * the freeze count so that a single timeout 2870 * is sufficient for releasing the queue. 2871 */ 2872 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2873 callout_stop(&dev->callout); 2874 } else { 2875 2876 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2877 } 2878 2879 callout_reset(&dev->callout, 2880 (crs->release_timeout * hz) / 1000, 2881 xpt_release_devq_timeout, dev); 2882 2883 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2884 2885 } 2886 2887 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2888 2889 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2890 /* 2891 * Decrement the freeze count so that a single 2892 * completion is still sufficient to unfreeze 2893 * the queue. 2894 */ 2895 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2896 } else { 2897 2898 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2899 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2900 } 2901 } 2902 2903 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2904 2905 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2906 || (dev->ccbq.dev_active == 0)) { 2907 2908 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2909 } else { 2910 2911 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2912 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2913 } 2914 } 2915 2916 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 2917 xpt_release_devq_rl(path, /*runlevel*/ 2918 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2919 crs->release_timeout : 0, 2920 /*count*/1, /*run_queue*/TRUE); 2921 } 2922 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt[0]; 2923 start_ccb->ccb_h.status = CAM_REQ_CMP; 2924 break; 2925 } 2926 case XPT_DEBUG: { 2927 /* Check that all request bits are supported. */ 2928 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 2929 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2930 break; 2931 } 2932 2933 cam_dflags = start_ccb->cdbg.flags; 2934 if (cam_dpath != NULL) { 2935 xpt_free_path(cam_dpath); 2936 cam_dpath = NULL; 2937 } 2938 if (cam_dflags != CAM_DEBUG_NONE) { 2939 if (xpt_create_path(&cam_dpath, xpt_periph, 2940 start_ccb->ccb_h.path_id, 2941 start_ccb->ccb_h.target_id, 2942 start_ccb->ccb_h.target_lun) != 2943 CAM_REQ_CMP) { 2944 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2945 cam_dflags = CAM_DEBUG_NONE; 2946 } else { 2947 start_ccb->ccb_h.status = CAM_REQ_CMP; 2948 xpt_print(cam_dpath, "debugging flags now %x\n", 2949 cam_dflags); 2950 } 2951 } else { 2952 cam_dpath = NULL; 2953 start_ccb->ccb_h.status = CAM_REQ_CMP; 2954 } 2955 break; 2956 } 2957 case XPT_FREEZE_QUEUE: 2958 { 2959 struct ccb_relsim *crs = &start_ccb->crs; 2960 2961 xpt_freeze_devq_rl(path, /*runlevel*/ 2962 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2963 crs->release_timeout : 0, /*count*/1); 2964 start_ccb->ccb_h.status = CAM_REQ_CMP; 2965 break; 2966 } 2967 case XPT_NOOP: 2968 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 2969 xpt_freeze_devq(path, 1); 2970 start_ccb->ccb_h.status = CAM_REQ_CMP; 2971 break; 2972 default: 2973 case XPT_SDEV_TYPE: 2974 case XPT_TERM_IO: 2975 case XPT_ENG_INQ: 2976 /* XXX Implement */ 2977 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 2978 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 2979 xpt_done(start_ccb); 2980 } 2981 break; 2982 } 2983 } 2984 2985 void 2986 xpt_polled_action(union ccb *start_ccb) 2987 { 2988 u_int32_t timeout; 2989 struct cam_sim *sim; 2990 struct cam_devq *devq; 2991 struct cam_ed *dev; 2992 2993 2994 timeout = start_ccb->ccb_h.timeout * 10; 2995 sim = start_ccb->ccb_h.path->bus->sim; 2996 devq = sim->devq; 2997 dev = start_ccb->ccb_h.path->device; 2998 2999 mtx_assert(sim->mtx, MA_OWNED); 3000 3001 /* Don't use ISR for this SIM while polling. */ 3002 sim->flags |= CAM_SIM_POLLED; 3003 3004 /* 3005 * Steal an opening so that no other queued requests 3006 * can get it before us while we simulate interrupts. 3007 */ 3008 dev->ccbq.devq_openings--; 3009 dev->ccbq.dev_openings--; 3010 3011 while(((devq != NULL && devq->send_openings <= 0) || 3012 dev->ccbq.dev_openings < 0) && (--timeout > 0)) { 3013 DELAY(100); 3014 (*(sim->sim_poll))(sim); 3015 camisr_runqueue(&sim->sim_doneq); 3016 } 3017 3018 dev->ccbq.devq_openings++; 3019 dev->ccbq.dev_openings++; 3020 3021 if (timeout != 0) { 3022 xpt_action(start_ccb); 3023 while(--timeout > 0) { 3024 (*(sim->sim_poll))(sim); 3025 camisr_runqueue(&sim->sim_doneq); 3026 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3027 != CAM_REQ_INPROG) 3028 break; 3029 DELAY(100); 3030 } 3031 if (timeout == 0) { 3032 /* 3033 * XXX Is it worth adding a sim_timeout entry 3034 * point so we can attempt recovery? If 3035 * this is only used for dumps, I don't think 3036 * it is. 3037 */ 3038 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3039 } 3040 } else { 3041 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3042 } 3043 3044 /* We will use CAM ISR for this SIM again. */ 3045 sim->flags &= ~CAM_SIM_POLLED; 3046 } 3047 3048 /* 3049 * Schedule a peripheral driver to receive a ccb when it's 3050 * target device has space for more transactions. 3051 */ 3052 void 3053 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3054 { 3055 struct cam_ed *device; 3056 int runq = 0; 3057 3058 mtx_assert(perph->sim->mtx, MA_OWNED); 3059 3060 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3061 device = perph->path->device; 3062 if (periph_is_queued(perph)) { 3063 /* Simply reorder based on new priority */ 3064 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3065 (" change priority to %d\n", new_priority)); 3066 if (new_priority < perph->pinfo.priority) { 3067 camq_change_priority(&device->drvq, 3068 perph->pinfo.index, 3069 new_priority); 3070 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3071 } 3072 } else { 3073 /* New entry on the queue */ 3074 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3075 (" added periph to queue\n")); 3076 perph->pinfo.priority = new_priority; 3077 perph->pinfo.generation = ++device->drvq.generation; 3078 camq_insert(&device->drvq, &perph->pinfo); 3079 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3080 } 3081 if (runq != 0) { 3082 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3083 (" calling xpt_run_devq\n")); 3084 xpt_run_dev_allocq(perph->path->bus); 3085 } 3086 } 3087 3088 3089 /* 3090 * Schedule a device to run on a given queue. 3091 * If the device was inserted as a new entry on the queue, 3092 * return 1 meaning the device queue should be run. If we 3093 * were already queued, implying someone else has already 3094 * started the queue, return 0 so the caller doesn't attempt 3095 * to run the queue. 3096 */ 3097 int 3098 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3099 u_int32_t new_priority) 3100 { 3101 int retval; 3102 u_int32_t old_priority; 3103 3104 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3105 3106 old_priority = pinfo->priority; 3107 3108 /* 3109 * Are we already queued? 3110 */ 3111 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3112 /* Simply reorder based on new priority */ 3113 if (new_priority < old_priority) { 3114 camq_change_priority(queue, pinfo->index, 3115 new_priority); 3116 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3117 ("changed priority to %d\n", 3118 new_priority)); 3119 retval = 1; 3120 } else 3121 retval = 0; 3122 } else { 3123 /* New entry on the queue */ 3124 if (new_priority < old_priority) 3125 pinfo->priority = new_priority; 3126 3127 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3128 ("Inserting onto queue\n")); 3129 pinfo->generation = ++queue->generation; 3130 camq_insert(queue, pinfo); 3131 retval = 1; 3132 } 3133 return (retval); 3134 } 3135 3136 static void 3137 xpt_run_dev_allocq(struct cam_eb *bus) 3138 { 3139 struct cam_devq *devq; 3140 3141 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3142 devq = bus->sim->devq; 3143 3144 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3145 (" qfrozen_cnt == 0x%x, entries == %d, " 3146 "openings == %d, active == %d\n", 3147 devq->alloc_queue.qfrozen_cnt[0], 3148 devq->alloc_queue.entries, 3149 devq->alloc_openings, 3150 devq->alloc_active)); 3151 3152 devq->alloc_queue.qfrozen_cnt[0]++; 3153 while ((devq->alloc_queue.entries > 0) 3154 && (devq->alloc_openings > 0) 3155 && (devq->alloc_queue.qfrozen_cnt[0] <= 1)) { 3156 struct cam_ed_qinfo *qinfo; 3157 struct cam_ed *device; 3158 union ccb *work_ccb; 3159 struct cam_periph *drv; 3160 struct camq *drvq; 3161 3162 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3163 CAMQ_HEAD); 3164 device = qinfo->device; 3165 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3166 ("running device %p\n", device)); 3167 3168 drvq = &device->drvq; 3169 KASSERT(drvq->entries > 0, ("xpt_run_dev_allocq: " 3170 "Device on queue without any work to do")); 3171 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3172 devq->alloc_openings--; 3173 devq->alloc_active++; 3174 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3175 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3176 drv->pinfo.priority); 3177 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3178 ("calling periph start\n")); 3179 drv->periph_start(drv, work_ccb); 3180 } else { 3181 /* 3182 * Malloc failure in alloc_ccb 3183 */ 3184 /* 3185 * XXX add us to a list to be run from free_ccb 3186 * if we don't have any ccbs active on this 3187 * device queue otherwise we may never get run 3188 * again. 3189 */ 3190 break; 3191 } 3192 3193 /* We may have more work. Attempt to reschedule. */ 3194 xpt_schedule_dev_allocq(bus, device); 3195 } 3196 devq->alloc_queue.qfrozen_cnt[0]--; 3197 } 3198 3199 static void 3200 xpt_run_dev_sendq(struct cam_eb *bus) 3201 { 3202 struct cam_devq *devq; 3203 3204 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3205 3206 devq = bus->sim->devq; 3207 3208 devq->send_queue.qfrozen_cnt[0]++; 3209 while ((devq->send_queue.entries > 0) 3210 && (devq->send_openings > 0) 3211 && (devq->send_queue.qfrozen_cnt[0] <= 1)) { 3212 struct cam_ed_qinfo *qinfo; 3213 struct cam_ed *device; 3214 union ccb *work_ccb; 3215 struct cam_sim *sim; 3216 3217 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3218 CAMQ_HEAD); 3219 device = qinfo->device; 3220 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3221 ("running device %p\n", device)); 3222 3223 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3224 if (work_ccb == NULL) { 3225 printf("device on run queue with no ccbs???\n"); 3226 continue; 3227 } 3228 3229 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3230 3231 mtx_lock(&xsoftc.xpt_lock); 3232 if (xsoftc.num_highpower <= 0) { 3233 /* 3234 * We got a high power command, but we 3235 * don't have any available slots. Freeze 3236 * the device queue until we have a slot 3237 * available. 3238 */ 3239 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3240 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3241 &work_ccb->ccb_h, 3242 xpt_links.stqe); 3243 3244 mtx_unlock(&xsoftc.xpt_lock); 3245 continue; 3246 } else { 3247 /* 3248 * Consume a high power slot while 3249 * this ccb runs. 3250 */ 3251 xsoftc.num_highpower--; 3252 } 3253 mtx_unlock(&xsoftc.xpt_lock); 3254 } 3255 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3256 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3257 3258 devq->send_openings--; 3259 devq->send_active++; 3260 3261 xpt_schedule_dev_sendq(bus, device); 3262 3263 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3264 /* 3265 * The client wants to freeze the queue 3266 * after this CCB is sent. 3267 */ 3268 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3269 } 3270 3271 /* In Target mode, the peripheral driver knows best... */ 3272 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3273 if ((device->inq_flags & SID_CmdQue) != 0 3274 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3275 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3276 else 3277 /* 3278 * Clear this in case of a retried CCB that 3279 * failed due to a rejected tag. 3280 */ 3281 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3282 } 3283 3284 /* 3285 * Device queues can be shared among multiple sim instances 3286 * that reside on different busses. Use the SIM in the queue 3287 * CCB's path, rather than the one in the bus that was passed 3288 * into this function. 3289 */ 3290 sim = work_ccb->ccb_h.path->bus->sim; 3291 (*(sim->sim_action))(sim, work_ccb); 3292 } 3293 devq->send_queue.qfrozen_cnt[0]--; 3294 } 3295 3296 /* 3297 * This function merges stuff from the slave ccb into the master ccb, while 3298 * keeping important fields in the master ccb constant. 3299 */ 3300 void 3301 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3302 { 3303 3304 /* 3305 * Pull fields that are valid for peripheral drivers to set 3306 * into the master CCB along with the CCB "payload". 3307 */ 3308 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3309 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3310 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3311 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3312 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3313 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3314 } 3315 3316 void 3317 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3318 { 3319 3320 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3321 ccb_h->pinfo.priority = priority; 3322 ccb_h->path = path; 3323 ccb_h->path_id = path->bus->path_id; 3324 if (path->target) 3325 ccb_h->target_id = path->target->target_id; 3326 else 3327 ccb_h->target_id = CAM_TARGET_WILDCARD; 3328 if (path->device) { 3329 ccb_h->target_lun = path->device->lun_id; 3330 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3331 } else { 3332 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3333 } 3334 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3335 ccb_h->flags = 0; 3336 } 3337 3338 /* Path manipulation functions */ 3339 cam_status 3340 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3341 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3342 { 3343 struct cam_path *path; 3344 cam_status status; 3345 3346 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3347 3348 if (path == NULL) { 3349 status = CAM_RESRC_UNAVAIL; 3350 return(status); 3351 } 3352 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3353 if (status != CAM_REQ_CMP) { 3354 free(path, M_CAMXPT); 3355 path = NULL; 3356 } 3357 *new_path_ptr = path; 3358 return (status); 3359 } 3360 3361 cam_status 3362 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3363 struct cam_periph *periph, path_id_t path_id, 3364 target_id_t target_id, lun_id_t lun_id) 3365 { 3366 struct cam_path *path; 3367 struct cam_eb *bus = NULL; 3368 cam_status status; 3369 int need_unlock = 0; 3370 3371 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3372 3373 if (path_id != CAM_BUS_WILDCARD) { 3374 bus = xpt_find_bus(path_id); 3375 if (bus != NULL) { 3376 need_unlock = 1; 3377 CAM_SIM_LOCK(bus->sim); 3378 } 3379 } 3380 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3381 if (need_unlock) { 3382 CAM_SIM_UNLOCK(bus->sim); 3383 xpt_release_bus(bus); 3384 } 3385 if (status != CAM_REQ_CMP) { 3386 free(path, M_CAMXPT); 3387 path = NULL; 3388 } 3389 *new_path_ptr = path; 3390 return (status); 3391 } 3392 3393 cam_status 3394 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3395 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3396 { 3397 struct cam_eb *bus; 3398 struct cam_et *target; 3399 struct cam_ed *device; 3400 cam_status status; 3401 3402 status = CAM_REQ_CMP; /* Completed without error */ 3403 target = NULL; /* Wildcarded */ 3404 device = NULL; /* Wildcarded */ 3405 3406 /* 3407 * We will potentially modify the EDT, so block interrupts 3408 * that may attempt to create cam paths. 3409 */ 3410 bus = xpt_find_bus(path_id); 3411 if (bus == NULL) { 3412 status = CAM_PATH_INVALID; 3413 } else { 3414 target = xpt_find_target(bus, target_id); 3415 if (target == NULL) { 3416 /* Create one */ 3417 struct cam_et *new_target; 3418 3419 new_target = xpt_alloc_target(bus, target_id); 3420 if (new_target == NULL) { 3421 status = CAM_RESRC_UNAVAIL; 3422 } else { 3423 target = new_target; 3424 } 3425 } 3426 if (target != NULL) { 3427 device = xpt_find_device(target, lun_id); 3428 if (device == NULL) { 3429 /* Create one */ 3430 struct cam_ed *new_device; 3431 3432 new_device = 3433 (*(bus->xport->alloc_device))(bus, 3434 target, 3435 lun_id); 3436 if (new_device == NULL) { 3437 status = CAM_RESRC_UNAVAIL; 3438 } else { 3439 device = new_device; 3440 } 3441 } 3442 } 3443 } 3444 3445 /* 3446 * Only touch the user's data if we are successful. 3447 */ 3448 if (status == CAM_REQ_CMP) { 3449 new_path->periph = perph; 3450 new_path->bus = bus; 3451 new_path->target = target; 3452 new_path->device = device; 3453 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3454 } else { 3455 if (device != NULL) 3456 xpt_release_device(device); 3457 if (target != NULL) 3458 xpt_release_target(target); 3459 if (bus != NULL) 3460 xpt_release_bus(bus); 3461 } 3462 return (status); 3463 } 3464 3465 void 3466 xpt_release_path(struct cam_path *path) 3467 { 3468 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3469 if (path->device != NULL) { 3470 xpt_release_device(path->device); 3471 path->device = NULL; 3472 } 3473 if (path->target != NULL) { 3474 xpt_release_target(path->target); 3475 path->target = NULL; 3476 } 3477 if (path->bus != NULL) { 3478 xpt_release_bus(path->bus); 3479 path->bus = NULL; 3480 } 3481 } 3482 3483 void 3484 xpt_free_path(struct cam_path *path) 3485 { 3486 3487 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3488 xpt_release_path(path); 3489 free(path, M_CAMXPT); 3490 } 3491 3492 void 3493 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3494 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3495 { 3496 3497 mtx_lock(&xsoftc.xpt_topo_lock); 3498 if (bus_ref) { 3499 if (path->bus) 3500 *bus_ref = path->bus->refcount; 3501 else 3502 *bus_ref = 0; 3503 } 3504 mtx_unlock(&xsoftc.xpt_topo_lock); 3505 if (periph_ref) { 3506 if (path->periph) 3507 *periph_ref = path->periph->refcount; 3508 else 3509 *periph_ref = 0; 3510 } 3511 if (target_ref) { 3512 if (path->target) 3513 *target_ref = path->target->refcount; 3514 else 3515 *target_ref = 0; 3516 } 3517 if (device_ref) { 3518 if (path->device) 3519 *device_ref = path->device->refcount; 3520 else 3521 *device_ref = 0; 3522 } 3523 } 3524 3525 /* 3526 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3527 * in path1, 2 for match with wildcards in path2. 3528 */ 3529 int 3530 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3531 { 3532 int retval = 0; 3533 3534 if (path1->bus != path2->bus) { 3535 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3536 retval = 1; 3537 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3538 retval = 2; 3539 else 3540 return (-1); 3541 } 3542 if (path1->target != path2->target) { 3543 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3544 if (retval == 0) 3545 retval = 1; 3546 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3547 retval = 2; 3548 else 3549 return (-1); 3550 } 3551 if (path1->device != path2->device) { 3552 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3553 if (retval == 0) 3554 retval = 1; 3555 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3556 retval = 2; 3557 else 3558 return (-1); 3559 } 3560 return (retval); 3561 } 3562 3563 void 3564 xpt_print_path(struct cam_path *path) 3565 { 3566 3567 if (path == NULL) 3568 printf("(nopath): "); 3569 else { 3570 if (path->periph != NULL) 3571 printf("(%s%d:", path->periph->periph_name, 3572 path->periph->unit_number); 3573 else 3574 printf("(noperiph:"); 3575 3576 if (path->bus != NULL) 3577 printf("%s%d:%d:", path->bus->sim->sim_name, 3578 path->bus->sim->unit_number, 3579 path->bus->sim->bus_id); 3580 else 3581 printf("nobus:"); 3582 3583 if (path->target != NULL) 3584 printf("%d:", path->target->target_id); 3585 else 3586 printf("X:"); 3587 3588 if (path->device != NULL) 3589 printf("%d): ", path->device->lun_id); 3590 else 3591 printf("X): "); 3592 } 3593 } 3594 3595 void 3596 xpt_print(struct cam_path *path, const char *fmt, ...) 3597 { 3598 va_list ap; 3599 xpt_print_path(path); 3600 va_start(ap, fmt); 3601 vprintf(fmt, ap); 3602 va_end(ap); 3603 } 3604 3605 int 3606 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3607 { 3608 struct sbuf sb; 3609 3610 #ifdef INVARIANTS 3611 if (path != NULL && path->bus != NULL) 3612 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3613 #endif 3614 3615 sbuf_new(&sb, str, str_len, 0); 3616 3617 if (path == NULL) 3618 sbuf_printf(&sb, "(nopath): "); 3619 else { 3620 if (path->periph != NULL) 3621 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3622 path->periph->unit_number); 3623 else 3624 sbuf_printf(&sb, "(noperiph:"); 3625 3626 if (path->bus != NULL) 3627 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3628 path->bus->sim->unit_number, 3629 path->bus->sim->bus_id); 3630 else 3631 sbuf_printf(&sb, "nobus:"); 3632 3633 if (path->target != NULL) 3634 sbuf_printf(&sb, "%d:", path->target->target_id); 3635 else 3636 sbuf_printf(&sb, "X:"); 3637 3638 if (path->device != NULL) 3639 sbuf_printf(&sb, "%d): ", path->device->lun_id); 3640 else 3641 sbuf_printf(&sb, "X): "); 3642 } 3643 sbuf_finish(&sb); 3644 3645 return(sbuf_len(&sb)); 3646 } 3647 3648 path_id_t 3649 xpt_path_path_id(struct cam_path *path) 3650 { 3651 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3652 3653 return(path->bus->path_id); 3654 } 3655 3656 target_id_t 3657 xpt_path_target_id(struct cam_path *path) 3658 { 3659 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3660 3661 if (path->target != NULL) 3662 return (path->target->target_id); 3663 else 3664 return (CAM_TARGET_WILDCARD); 3665 } 3666 3667 lun_id_t 3668 xpt_path_lun_id(struct cam_path *path) 3669 { 3670 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3671 3672 if (path->device != NULL) 3673 return (path->device->lun_id); 3674 else 3675 return (CAM_LUN_WILDCARD); 3676 } 3677 3678 struct cam_sim * 3679 xpt_path_sim(struct cam_path *path) 3680 { 3681 3682 return (path->bus->sim); 3683 } 3684 3685 struct cam_periph* 3686 xpt_path_periph(struct cam_path *path) 3687 { 3688 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3689 3690 return (path->periph); 3691 } 3692 3693 int 3694 xpt_path_legacy_ata_id(struct cam_path *path) 3695 { 3696 struct cam_eb *bus; 3697 int bus_id; 3698 3699 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) && 3700 strcmp(path->bus->sim->sim_name, "ahcich") != 0 && 3701 strcmp(path->bus->sim->sim_name, "mvsch") != 0 && 3702 strcmp(path->bus->sim->sim_name, "siisch") != 0) 3703 return (-1); 3704 3705 if (strcmp(path->bus->sim->sim_name, "ata") == 0 && 3706 path->bus->sim->unit_number < 2) { 3707 bus_id = path->bus->sim->unit_number; 3708 } else { 3709 bus_id = 2; 3710 xpt_lock_buses(); 3711 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 3712 if (bus == path->bus) 3713 break; 3714 if ((strcmp(bus->sim->sim_name, "ata") == 0 && 3715 bus->sim->unit_number >= 2) || 3716 strcmp(bus->sim->sim_name, "ahcich") == 0 || 3717 strcmp(bus->sim->sim_name, "mvsch") == 0 || 3718 strcmp(bus->sim->sim_name, "siisch") == 0) 3719 bus_id++; 3720 } 3721 xpt_unlock_buses(); 3722 } 3723 if (path->target != NULL) { 3724 if (path->target->target_id < 2) 3725 return (bus_id * 2 + path->target->target_id); 3726 else 3727 return (-1); 3728 } else 3729 return (bus_id * 2); 3730 } 3731 3732 /* 3733 * Release a CAM control block for the caller. Remit the cost of the structure 3734 * to the device referenced by the path. If the this device had no 'credits' 3735 * and peripheral drivers have registered async callbacks for this notification 3736 * call them now. 3737 */ 3738 void 3739 xpt_release_ccb(union ccb *free_ccb) 3740 { 3741 struct cam_path *path; 3742 struct cam_ed *device; 3743 struct cam_eb *bus; 3744 struct cam_sim *sim; 3745 3746 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3747 path = free_ccb->ccb_h.path; 3748 device = path->device; 3749 bus = path->bus; 3750 sim = bus->sim; 3751 3752 mtx_assert(sim->mtx, MA_OWNED); 3753 3754 cam_ccbq_release_opening(&device->ccbq); 3755 if (device->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) { 3756 device->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 3757 cam_ccbq_resize(&device->ccbq, 3758 device->ccbq.dev_openings + device->ccbq.dev_active); 3759 } 3760 if (sim->ccb_count > sim->max_ccbs) { 3761 xpt_free_ccb(free_ccb); 3762 sim->ccb_count--; 3763 } else { 3764 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 3765 xpt_links.sle); 3766 } 3767 if (sim->devq == NULL) { 3768 return; 3769 } 3770 sim->devq->alloc_openings++; 3771 sim->devq->alloc_active--; 3772 if (device_is_alloc_queued(device) == 0) 3773 xpt_schedule_dev_allocq(bus, device); 3774 xpt_run_dev_allocq(bus); 3775 } 3776 3777 /* Functions accessed by SIM drivers */ 3778 3779 static struct xpt_xport xport_default = { 3780 .alloc_device = xpt_alloc_device_default, 3781 .action = xpt_action_default, 3782 .async = xpt_dev_async_default, 3783 }; 3784 3785 /* 3786 * A sim structure, listing the SIM entry points and instance 3787 * identification info is passed to xpt_bus_register to hook the SIM 3788 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3789 * for this new bus and places it in the array of busses and assigns 3790 * it a path_id. The path_id may be influenced by "hard wiring" 3791 * information specified by the user. Once interrupt services are 3792 * available, the bus will be probed. 3793 */ 3794 int32_t 3795 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3796 { 3797 struct cam_eb *new_bus; 3798 struct cam_eb *old_bus; 3799 struct ccb_pathinq cpi; 3800 struct cam_path *path; 3801 cam_status status; 3802 3803 mtx_assert(sim->mtx, MA_OWNED); 3804 3805 sim->bus_id = bus; 3806 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3807 M_CAMXPT, M_NOWAIT); 3808 if (new_bus == NULL) { 3809 /* Couldn't satisfy request */ 3810 return (CAM_RESRC_UNAVAIL); 3811 } 3812 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3813 if (path == NULL) { 3814 free(new_bus, M_CAMXPT); 3815 return (CAM_RESRC_UNAVAIL); 3816 } 3817 3818 if (strcmp(sim->sim_name, "xpt") != 0) { 3819 sim->path_id = 3820 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3821 } 3822 3823 TAILQ_INIT(&new_bus->et_entries); 3824 new_bus->path_id = sim->path_id; 3825 cam_sim_hold(sim); 3826 new_bus->sim = sim; 3827 timevalclear(&new_bus->last_reset); 3828 new_bus->flags = 0; 3829 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3830 new_bus->generation = 0; 3831 3832 mtx_lock(&xsoftc.xpt_topo_lock); 3833 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3834 while (old_bus != NULL 3835 && old_bus->path_id < new_bus->path_id) 3836 old_bus = TAILQ_NEXT(old_bus, links); 3837 if (old_bus != NULL) 3838 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3839 else 3840 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3841 xsoftc.bus_generation++; 3842 mtx_unlock(&xsoftc.xpt_topo_lock); 3843 3844 /* 3845 * Set a default transport so that a PATH_INQ can be issued to 3846 * the SIM. This will then allow for probing and attaching of 3847 * a more appropriate transport. 3848 */ 3849 new_bus->xport = &xport_default; 3850 3851 status = xpt_compile_path(path, /*periph*/NULL, sim->path_id, 3852 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3853 if (status != CAM_REQ_CMP) 3854 printf("xpt_compile_path returned %d\n", status); 3855 3856 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3857 cpi.ccb_h.func_code = XPT_PATH_INQ; 3858 xpt_action((union ccb *)&cpi); 3859 3860 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3861 switch (cpi.transport) { 3862 case XPORT_SPI: 3863 case XPORT_SAS: 3864 case XPORT_FC: 3865 case XPORT_USB: 3866 case XPORT_ISCSI: 3867 case XPORT_PPB: 3868 new_bus->xport = scsi_get_xport(); 3869 break; 3870 case XPORT_ATA: 3871 case XPORT_SATA: 3872 new_bus->xport = ata_get_xport(); 3873 break; 3874 default: 3875 new_bus->xport = &xport_default; 3876 break; 3877 } 3878 } 3879 3880 /* Notify interested parties */ 3881 if (sim->path_id != CAM_XPT_PATH_ID) { 3882 union ccb *scan_ccb; 3883 3884 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3885 /* Initiate bus rescan. */ 3886 scan_ccb = xpt_alloc_ccb_nowait(); 3887 scan_ccb->ccb_h.path = path; 3888 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3889 scan_ccb->crcn.flags = 0; 3890 xpt_rescan(scan_ccb); 3891 } else 3892 xpt_free_path(path); 3893 return (CAM_SUCCESS); 3894 } 3895 3896 int32_t 3897 xpt_bus_deregister(path_id_t pathid) 3898 { 3899 struct cam_path bus_path; 3900 cam_status status; 3901 3902 status = xpt_compile_path(&bus_path, NULL, pathid, 3903 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3904 if (status != CAM_REQ_CMP) 3905 return (status); 3906 3907 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3908 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3909 3910 /* Release the reference count held while registered. */ 3911 xpt_release_bus(bus_path.bus); 3912 xpt_release_path(&bus_path); 3913 3914 return (CAM_REQ_CMP); 3915 } 3916 3917 static path_id_t 3918 xptnextfreepathid(void) 3919 { 3920 struct cam_eb *bus; 3921 path_id_t pathid; 3922 const char *strval; 3923 3924 pathid = 0; 3925 mtx_lock(&xsoftc.xpt_topo_lock); 3926 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3927 retry: 3928 /* Find an unoccupied pathid */ 3929 while (bus != NULL && bus->path_id <= pathid) { 3930 if (bus->path_id == pathid) 3931 pathid++; 3932 bus = TAILQ_NEXT(bus, links); 3933 } 3934 mtx_unlock(&xsoftc.xpt_topo_lock); 3935 3936 /* 3937 * Ensure that this pathid is not reserved for 3938 * a bus that may be registered in the future. 3939 */ 3940 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3941 ++pathid; 3942 /* Start the search over */ 3943 mtx_lock(&xsoftc.xpt_topo_lock); 3944 goto retry; 3945 } 3946 return (pathid); 3947 } 3948 3949 static path_id_t 3950 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3951 { 3952 path_id_t pathid; 3953 int i, dunit, val; 3954 char buf[32]; 3955 const char *dname; 3956 3957 pathid = CAM_XPT_PATH_ID; 3958 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3959 i = 0; 3960 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 3961 if (strcmp(dname, "scbus")) { 3962 /* Avoid a bit of foot shooting. */ 3963 continue; 3964 } 3965 if (dunit < 0) /* unwired?! */ 3966 continue; 3967 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 3968 if (sim_bus == val) { 3969 pathid = dunit; 3970 break; 3971 } 3972 } else if (sim_bus == 0) { 3973 /* Unspecified matches bus 0 */ 3974 pathid = dunit; 3975 break; 3976 } else { 3977 printf("Ambiguous scbus configuration for %s%d " 3978 "bus %d, cannot wire down. The kernel " 3979 "config entry for scbus%d should " 3980 "specify a controller bus.\n" 3981 "Scbus will be assigned dynamically.\n", 3982 sim_name, sim_unit, sim_bus, dunit); 3983 break; 3984 } 3985 } 3986 3987 if (pathid == CAM_XPT_PATH_ID) 3988 pathid = xptnextfreepathid(); 3989 return (pathid); 3990 } 3991 3992 static const char * 3993 xpt_async_string(u_int32_t async_code) 3994 { 3995 3996 switch (async_code) { 3997 case AC_BUS_RESET: return ("AC_BUS_RESET"); 3998 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 3999 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4000 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4001 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4002 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4003 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4004 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4005 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4006 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4007 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4008 case AC_CONTRACT: return ("AC_CONTRACT"); 4009 } 4010 return ("AC_UNKNOWN"); 4011 } 4012 4013 void 4014 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4015 { 4016 struct cam_eb *bus; 4017 struct cam_et *target, *next_target; 4018 struct cam_ed *device, *next_device; 4019 4020 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4021 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4022 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4023 4024 /* 4025 * Most async events come from a CAM interrupt context. In 4026 * a few cases, the error recovery code at the peripheral layer, 4027 * which may run from our SWI or a process context, may signal 4028 * deferred events with a call to xpt_async. 4029 */ 4030 4031 bus = path->bus; 4032 4033 if (async_code == AC_BUS_RESET) { 4034 /* Update our notion of when the last reset occurred */ 4035 microtime(&bus->last_reset); 4036 } 4037 4038 for (target = TAILQ_FIRST(&bus->et_entries); 4039 target != NULL; 4040 target = next_target) { 4041 4042 next_target = TAILQ_NEXT(target, links); 4043 4044 if (path->target != target 4045 && path->target->target_id != CAM_TARGET_WILDCARD 4046 && target->target_id != CAM_TARGET_WILDCARD) 4047 continue; 4048 4049 if (async_code == AC_SENT_BDR) { 4050 /* Update our notion of when the last reset occurred */ 4051 microtime(&path->target->last_reset); 4052 } 4053 4054 for (device = TAILQ_FIRST(&target->ed_entries); 4055 device != NULL; 4056 device = next_device) { 4057 4058 next_device = TAILQ_NEXT(device, links); 4059 4060 if (path->device != device 4061 && path->device->lun_id != CAM_LUN_WILDCARD 4062 && device->lun_id != CAM_LUN_WILDCARD) 4063 continue; 4064 /* 4065 * The async callback could free the device. 4066 * If it is a broadcast async, it doesn't hold 4067 * device reference, so take our own reference. 4068 */ 4069 xpt_acquire_device(device); 4070 (*(bus->xport->async))(async_code, bus, 4071 target, device, 4072 async_arg); 4073 4074 xpt_async_bcast(&device->asyncs, async_code, 4075 path, async_arg); 4076 xpt_release_device(device); 4077 } 4078 } 4079 4080 /* 4081 * If this wasn't a fully wildcarded async, tell all 4082 * clients that want all async events. 4083 */ 4084 if (bus != xpt_periph->path->bus) 4085 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4086 path, async_arg); 4087 } 4088 4089 static void 4090 xpt_async_bcast(struct async_list *async_head, 4091 u_int32_t async_code, 4092 struct cam_path *path, void *async_arg) 4093 { 4094 struct async_node *cur_entry; 4095 4096 cur_entry = SLIST_FIRST(async_head); 4097 while (cur_entry != NULL) { 4098 struct async_node *next_entry; 4099 /* 4100 * Grab the next list entry before we call the current 4101 * entry's callback. This is because the callback function 4102 * can delete its async callback entry. 4103 */ 4104 next_entry = SLIST_NEXT(cur_entry, links); 4105 if ((cur_entry->event_enable & async_code) != 0) 4106 cur_entry->callback(cur_entry->callback_arg, 4107 async_code, path, 4108 async_arg); 4109 cur_entry = next_entry; 4110 } 4111 } 4112 4113 static void 4114 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4115 struct cam_et *target, struct cam_ed *device, 4116 void *async_arg) 4117 { 4118 printf("%s called\n", __func__); 4119 } 4120 4121 u_int32_t 4122 xpt_freeze_devq_rl(struct cam_path *path, cam_rl rl, u_int count) 4123 { 4124 struct cam_ed *dev = path->device; 4125 4126 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4127 dev->sim->devq->alloc_openings += 4128 cam_ccbq_freeze(&dev->ccbq, rl, count); 4129 /* Remove frozen device from allocq. */ 4130 if (device_is_alloc_queued(dev) && 4131 cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 4132 CAMQ_GET_PRIO(&dev->drvq)))) { 4133 camq_remove(&dev->sim->devq->alloc_queue, 4134 dev->alloc_ccb_entry.pinfo.index); 4135 } 4136 /* Remove frozen device from sendq. */ 4137 if (device_is_send_queued(dev) && 4138 cam_ccbq_frozen_top(&dev->ccbq)) { 4139 camq_remove(&dev->sim->devq->send_queue, 4140 dev->send_ccb_entry.pinfo.index); 4141 } 4142 return (dev->ccbq.queue.qfrozen_cnt[rl]); 4143 } 4144 4145 u_int32_t 4146 xpt_freeze_devq(struct cam_path *path, u_int count) 4147 { 4148 4149 return (xpt_freeze_devq_rl(path, 0, count)); 4150 } 4151 4152 u_int32_t 4153 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4154 { 4155 4156 mtx_assert(sim->mtx, MA_OWNED); 4157 sim->devq->send_queue.qfrozen_cnt[0] += count; 4158 return (sim->devq->send_queue.qfrozen_cnt[0]); 4159 } 4160 4161 static void 4162 xpt_release_devq_timeout(void *arg) 4163 { 4164 struct cam_ed *device; 4165 4166 device = (struct cam_ed *)arg; 4167 4168 xpt_release_devq_device(device, /*rl*/0, /*count*/1, /*run_queue*/TRUE); 4169 } 4170 4171 void 4172 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4173 { 4174 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4175 4176 xpt_release_devq_device(path->device, /*rl*/0, count, run_queue); 4177 } 4178 4179 void 4180 xpt_release_devq_rl(struct cam_path *path, cam_rl rl, u_int count, int run_queue) 4181 { 4182 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4183 4184 xpt_release_devq_device(path->device, rl, count, run_queue); 4185 } 4186 4187 static void 4188 xpt_release_devq_device(struct cam_ed *dev, cam_rl rl, u_int count, int run_queue) 4189 { 4190 4191 if (count > dev->ccbq.queue.qfrozen_cnt[rl]) { 4192 #ifdef INVARIANTS 4193 printf("xpt_release_devq(%d): requested %u > present %u\n", 4194 rl, count, dev->ccbq.queue.qfrozen_cnt[rl]); 4195 #endif 4196 count = dev->ccbq.queue.qfrozen_cnt[rl]; 4197 } 4198 dev->sim->devq->alloc_openings -= 4199 cam_ccbq_release(&dev->ccbq, rl, count); 4200 if (cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 4201 CAMQ_GET_PRIO(&dev->drvq))) == 0) { 4202 if (xpt_schedule_dev_allocq(dev->target->bus, dev)) 4203 xpt_run_dev_allocq(dev->target->bus); 4204 } 4205 if (cam_ccbq_frozen_top(&dev->ccbq) == 0) { 4206 /* 4207 * No longer need to wait for a successful 4208 * command completion. 4209 */ 4210 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4211 /* 4212 * Remove any timeouts that might be scheduled 4213 * to release this queue. 4214 */ 4215 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4216 callout_stop(&dev->callout); 4217 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4218 } 4219 if (run_queue == 0) 4220 return; 4221 /* 4222 * Now that we are unfrozen schedule the 4223 * device so any pending transactions are 4224 * run. 4225 */ 4226 if (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4227 xpt_run_dev_sendq(dev->target->bus); 4228 } 4229 } 4230 4231 void 4232 xpt_release_simq(struct cam_sim *sim, int run_queue) 4233 { 4234 struct camq *sendq; 4235 4236 mtx_assert(sim->mtx, MA_OWNED); 4237 sendq = &(sim->devq->send_queue); 4238 if (sendq->qfrozen_cnt[0] <= 0) { 4239 #ifdef INVARIANTS 4240 printf("xpt_release_simq: requested 1 > present %u\n", 4241 sendq->qfrozen_cnt[0]); 4242 #endif 4243 } else 4244 sendq->qfrozen_cnt[0]--; 4245 if (sendq->qfrozen_cnt[0] == 0) { 4246 /* 4247 * If there is a timeout scheduled to release this 4248 * sim queue, remove it. The queue frozen count is 4249 * already at 0. 4250 */ 4251 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4252 callout_stop(&sim->callout); 4253 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4254 } 4255 if (run_queue) { 4256 struct cam_eb *bus; 4257 4258 /* 4259 * Now that we are unfrozen run the send queue. 4260 */ 4261 bus = xpt_find_bus(sim->path_id); 4262 xpt_run_dev_sendq(bus); 4263 xpt_release_bus(bus); 4264 } 4265 } 4266 } 4267 4268 /* 4269 * XXX Appears to be unused. 4270 */ 4271 static void 4272 xpt_release_simq_timeout(void *arg) 4273 { 4274 struct cam_sim *sim; 4275 4276 sim = (struct cam_sim *)arg; 4277 xpt_release_simq(sim, /* run_queue */ TRUE); 4278 } 4279 4280 void 4281 xpt_done(union ccb *done_ccb) 4282 { 4283 struct cam_sim *sim; 4284 int first; 4285 4286 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4287 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4288 /* 4289 * Queue up the request for handling by our SWI handler 4290 * any of the "non-immediate" type of ccbs. 4291 */ 4292 sim = done_ccb->ccb_h.path->bus->sim; 4293 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4294 sim_links.tqe); 4295 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4296 if ((sim->flags & (CAM_SIM_ON_DONEQ | CAM_SIM_POLLED | 4297 CAM_SIM_BATCH)) == 0) { 4298 mtx_lock(&cam_simq_lock); 4299 first = TAILQ_EMPTY(&cam_simq); 4300 TAILQ_INSERT_TAIL(&cam_simq, sim, links); 4301 mtx_unlock(&cam_simq_lock); 4302 sim->flags |= CAM_SIM_ON_DONEQ; 4303 if (first) 4304 swi_sched(cambio_ih, 0); 4305 } 4306 } 4307 } 4308 4309 void 4310 xpt_batch_start(struct cam_sim *sim) 4311 { 4312 4313 KASSERT((sim->flags & CAM_SIM_BATCH) == 0, ("Batch flag already set")); 4314 sim->flags |= CAM_SIM_BATCH; 4315 } 4316 4317 void 4318 xpt_batch_done(struct cam_sim *sim) 4319 { 4320 4321 KASSERT((sim->flags & CAM_SIM_BATCH) != 0, ("Batch flag was not set")); 4322 sim->flags &= ~CAM_SIM_BATCH; 4323 if (!TAILQ_EMPTY(&sim->sim_doneq) && 4324 (sim->flags & CAM_SIM_ON_DONEQ) == 0) 4325 camisr_runqueue(&sim->sim_doneq); 4326 } 4327 4328 union ccb * 4329 xpt_alloc_ccb() 4330 { 4331 union ccb *new_ccb; 4332 4333 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK); 4334 return (new_ccb); 4335 } 4336 4337 union ccb * 4338 xpt_alloc_ccb_nowait() 4339 { 4340 union ccb *new_ccb; 4341 4342 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT); 4343 return (new_ccb); 4344 } 4345 4346 void 4347 xpt_free_ccb(union ccb *free_ccb) 4348 { 4349 free(free_ccb, M_CAMXPT); 4350 } 4351 4352 4353 4354 /* Private XPT functions */ 4355 4356 /* 4357 * Get a CAM control block for the caller. Charge the structure to the device 4358 * referenced by the path. If the this device has no 'credits' then the 4359 * device already has the maximum number of outstanding operations under way 4360 * and we return NULL. If we don't have sufficient resources to allocate more 4361 * ccbs, we also return NULL. 4362 */ 4363 static union ccb * 4364 xpt_get_ccb(struct cam_ed *device) 4365 { 4366 union ccb *new_ccb; 4367 struct cam_sim *sim; 4368 4369 sim = device->sim; 4370 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4371 new_ccb = xpt_alloc_ccb_nowait(); 4372 if (new_ccb == NULL) { 4373 return (NULL); 4374 } 4375 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4376 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4377 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4378 xpt_links.sle); 4379 sim->ccb_count++; 4380 } 4381 cam_ccbq_take_opening(&device->ccbq); 4382 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4383 return (new_ccb); 4384 } 4385 4386 static void 4387 xpt_release_bus(struct cam_eb *bus) 4388 { 4389 4390 mtx_lock(&xsoftc.xpt_topo_lock); 4391 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4392 if ((--bus->refcount == 0) 4393 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4394 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4395 xsoftc.bus_generation++; 4396 mtx_unlock(&xsoftc.xpt_topo_lock); 4397 cam_sim_release(bus->sim); 4398 free(bus, M_CAMXPT); 4399 } else 4400 mtx_unlock(&xsoftc.xpt_topo_lock); 4401 } 4402 4403 static struct cam_et * 4404 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4405 { 4406 struct cam_et *target; 4407 4408 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT); 4409 if (target != NULL) { 4410 struct cam_et *cur_target; 4411 4412 TAILQ_INIT(&target->ed_entries); 4413 target->bus = bus; 4414 target->target_id = target_id; 4415 target->refcount = 1; 4416 target->generation = 0; 4417 target->luns = NULL; 4418 timevalclear(&target->last_reset); 4419 /* 4420 * Hold a reference to our parent bus so it 4421 * will not go away before we do. 4422 */ 4423 mtx_lock(&xsoftc.xpt_topo_lock); 4424 bus->refcount++; 4425 mtx_unlock(&xsoftc.xpt_topo_lock); 4426 4427 /* Insertion sort into our bus's target list */ 4428 cur_target = TAILQ_FIRST(&bus->et_entries); 4429 while (cur_target != NULL && cur_target->target_id < target_id) 4430 cur_target = TAILQ_NEXT(cur_target, links); 4431 4432 if (cur_target != NULL) { 4433 TAILQ_INSERT_BEFORE(cur_target, target, links); 4434 } else { 4435 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4436 } 4437 bus->generation++; 4438 } 4439 return (target); 4440 } 4441 4442 static void 4443 xpt_release_target(struct cam_et *target) 4444 { 4445 4446 if (target->refcount == 1) { 4447 if (TAILQ_FIRST(&target->ed_entries) == NULL) { 4448 TAILQ_REMOVE(&target->bus->et_entries, target, links); 4449 target->bus->generation++; 4450 xpt_release_bus(target->bus); 4451 if (target->luns) 4452 free(target->luns, M_CAMXPT); 4453 free(target, M_CAMXPT); 4454 } 4455 } else 4456 target->refcount--; 4457 } 4458 4459 static struct cam_ed * 4460 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4461 lun_id_t lun_id) 4462 { 4463 struct cam_ed *device, *cur_device; 4464 4465 device = xpt_alloc_device(bus, target, lun_id); 4466 if (device == NULL) 4467 return (NULL); 4468 4469 device->mintags = 1; 4470 device->maxtags = 1; 4471 bus->sim->max_ccbs += device->ccbq.devq_openings; 4472 cur_device = TAILQ_FIRST(&target->ed_entries); 4473 while (cur_device != NULL && cur_device->lun_id < lun_id) 4474 cur_device = TAILQ_NEXT(cur_device, links); 4475 if (cur_device != NULL) { 4476 TAILQ_INSERT_BEFORE(cur_device, device, links); 4477 } else { 4478 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4479 } 4480 target->generation++; 4481 4482 return (device); 4483 } 4484 4485 struct cam_ed * 4486 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4487 { 4488 struct cam_ed *device; 4489 struct cam_devq *devq; 4490 cam_status status; 4491 4492 /* Make space for us in the device queue on our bus */ 4493 devq = bus->sim->devq; 4494 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4495 4496 if (status != CAM_REQ_CMP) { 4497 device = NULL; 4498 } else { 4499 device = (struct cam_ed *)malloc(sizeof(*device), 4500 M_CAMXPT, M_NOWAIT); 4501 } 4502 4503 if (device != NULL) { 4504 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4505 device->alloc_ccb_entry.device = device; 4506 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4507 device->send_ccb_entry.device = device; 4508 device->target = target; 4509 device->lun_id = lun_id; 4510 device->sim = bus->sim; 4511 /* Initialize our queues */ 4512 if (camq_init(&device->drvq, 0) != 0) { 4513 free(device, M_CAMXPT); 4514 return (NULL); 4515 } 4516 if (cam_ccbq_init(&device->ccbq, 4517 bus->sim->max_dev_openings) != 0) { 4518 camq_fini(&device->drvq); 4519 free(device, M_CAMXPT); 4520 return (NULL); 4521 } 4522 SLIST_INIT(&device->asyncs); 4523 SLIST_INIT(&device->periphs); 4524 device->generation = 0; 4525 device->owner = NULL; 4526 device->flags = CAM_DEV_UNCONFIGURED; 4527 device->tag_delay_count = 0; 4528 device->tag_saved_openings = 0; 4529 device->refcount = 1; 4530 callout_init_mtx(&device->callout, bus->sim->mtx, 0); 4531 4532 /* 4533 * Hold a reference to our parent target so it 4534 * will not go away before we do. 4535 */ 4536 target->refcount++; 4537 4538 } 4539 return (device); 4540 } 4541 4542 void 4543 xpt_acquire_device(struct cam_ed *device) 4544 { 4545 4546 device->refcount++; 4547 } 4548 4549 void 4550 xpt_release_device(struct cam_ed *device) 4551 { 4552 4553 if (device->refcount == 1) { 4554 struct cam_devq *devq; 4555 4556 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4557 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4558 panic("Removing device while still queued for ccbs"); 4559 4560 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4561 callout_stop(&device->callout); 4562 4563 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4564 device->target->generation++; 4565 device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings; 4566 /* Release our slot in the devq */ 4567 devq = device->target->bus->sim->devq; 4568 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4569 camq_fini(&device->drvq); 4570 cam_ccbq_fini(&device->ccbq); 4571 xpt_release_target(device->target); 4572 free(device, M_CAMXPT); 4573 } else 4574 device->refcount--; 4575 } 4576 4577 u_int32_t 4578 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4579 { 4580 int diff; 4581 int result; 4582 struct cam_ed *dev; 4583 4584 dev = path->device; 4585 4586 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4587 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4588 if (result == CAM_REQ_CMP && (diff < 0)) { 4589 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4590 } 4591 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4592 || (dev->inq_flags & SID_CmdQue) != 0) 4593 dev->tag_saved_openings = newopenings; 4594 /* Adjust the global limit */ 4595 dev->sim->max_ccbs += diff; 4596 return (result); 4597 } 4598 4599 static struct cam_eb * 4600 xpt_find_bus(path_id_t path_id) 4601 { 4602 struct cam_eb *bus; 4603 4604 mtx_lock(&xsoftc.xpt_topo_lock); 4605 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4606 bus != NULL; 4607 bus = TAILQ_NEXT(bus, links)) { 4608 if (bus->path_id == path_id) { 4609 bus->refcount++; 4610 break; 4611 } 4612 } 4613 mtx_unlock(&xsoftc.xpt_topo_lock); 4614 return (bus); 4615 } 4616 4617 static struct cam_et * 4618 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4619 { 4620 struct cam_et *target; 4621 4622 for (target = TAILQ_FIRST(&bus->et_entries); 4623 target != NULL; 4624 target = TAILQ_NEXT(target, links)) { 4625 if (target->target_id == target_id) { 4626 target->refcount++; 4627 break; 4628 } 4629 } 4630 return (target); 4631 } 4632 4633 static struct cam_ed * 4634 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4635 { 4636 struct cam_ed *device; 4637 4638 for (device = TAILQ_FIRST(&target->ed_entries); 4639 device != NULL; 4640 device = TAILQ_NEXT(device, links)) { 4641 if (device->lun_id == lun_id) { 4642 device->refcount++; 4643 break; 4644 } 4645 } 4646 return (device); 4647 } 4648 4649 void 4650 xpt_start_tags(struct cam_path *path) 4651 { 4652 struct ccb_relsim crs; 4653 struct cam_ed *device; 4654 struct cam_sim *sim; 4655 int newopenings; 4656 4657 device = path->device; 4658 sim = path->bus->sim; 4659 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4660 xpt_freeze_devq(path, /*count*/1); 4661 device->inq_flags |= SID_CmdQue; 4662 if (device->tag_saved_openings != 0) 4663 newopenings = device->tag_saved_openings; 4664 else 4665 newopenings = min(device->maxtags, 4666 sim->max_tagged_dev_openings); 4667 xpt_dev_ccbq_resize(path, newopenings); 4668 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4669 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4670 crs.ccb_h.func_code = XPT_REL_SIMQ; 4671 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4672 crs.openings 4673 = crs.release_timeout 4674 = crs.qfrozen_cnt 4675 = 0; 4676 xpt_action((union ccb *)&crs); 4677 } 4678 4679 void 4680 xpt_stop_tags(struct cam_path *path) 4681 { 4682 struct ccb_relsim crs; 4683 struct cam_ed *device; 4684 struct cam_sim *sim; 4685 4686 device = path->device; 4687 sim = path->bus->sim; 4688 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4689 device->tag_delay_count = 0; 4690 xpt_freeze_devq(path, /*count*/1); 4691 device->inq_flags &= ~SID_CmdQue; 4692 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4693 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4694 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4695 crs.ccb_h.func_code = XPT_REL_SIMQ; 4696 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4697 crs.openings 4698 = crs.release_timeout 4699 = crs.qfrozen_cnt 4700 = 0; 4701 xpt_action((union ccb *)&crs); 4702 } 4703 4704 static void 4705 xpt_boot_delay(void *arg) 4706 { 4707 4708 xpt_release_boot(); 4709 } 4710 4711 static void 4712 xpt_config(void *arg) 4713 { 4714 /* 4715 * Now that interrupts are enabled, go find our devices 4716 */ 4717 4718 /* Setup debugging path */ 4719 if (cam_dflags != CAM_DEBUG_NONE) { 4720 /* 4721 * Locking is specifically omitted here. No SIMs have 4722 * registered yet, so xpt_create_path will only be searching 4723 * empty lists of targets and devices. 4724 */ 4725 if (xpt_create_path(&cam_dpath, xpt_periph, 4726 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4727 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4728 printf("xpt_config: xpt_create_path() failed for debug" 4729 " target %d:%d:%d, debugging disabled\n", 4730 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4731 cam_dflags = CAM_DEBUG_NONE; 4732 } 4733 } else 4734 cam_dpath = NULL; 4735 4736 periphdriver_init(1); 4737 xpt_hold_boot(); 4738 callout_init(&xsoftc.boot_callout, 1); 4739 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000, 4740 xpt_boot_delay, NULL); 4741 /* Fire up rescan thread. */ 4742 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) { 4743 printf("xpt_init: failed to create rescan thread\n"); 4744 } 4745 } 4746 4747 void 4748 xpt_hold_boot(void) 4749 { 4750 xpt_lock_buses(); 4751 xsoftc.buses_to_config++; 4752 xpt_unlock_buses(); 4753 } 4754 4755 void 4756 xpt_release_boot(void) 4757 { 4758 xpt_lock_buses(); 4759 xsoftc.buses_to_config--; 4760 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 4761 struct xpt_task *task; 4762 4763 xsoftc.buses_config_done = 1; 4764 xpt_unlock_buses(); 4765 /* Call manually because we don't have any busses */ 4766 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4767 if (task != NULL) { 4768 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4769 taskqueue_enqueue(taskqueue_thread, &task->task); 4770 } 4771 } else 4772 xpt_unlock_buses(); 4773 } 4774 4775 /* 4776 * If the given device only has one peripheral attached to it, and if that 4777 * peripheral is the passthrough driver, announce it. This insures that the 4778 * user sees some sort of announcement for every peripheral in their system. 4779 */ 4780 static int 4781 xptpassannouncefunc(struct cam_ed *device, void *arg) 4782 { 4783 struct cam_periph *periph; 4784 int i; 4785 4786 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 4787 periph = SLIST_NEXT(periph, periph_links), i++); 4788 4789 periph = SLIST_FIRST(&device->periphs); 4790 if ((i == 1) 4791 && (strncmp(periph->periph_name, "pass", 4) == 0)) 4792 xpt_announce_periph(periph, NULL); 4793 4794 return(1); 4795 } 4796 4797 static void 4798 xpt_finishconfig_task(void *context, int pending) 4799 { 4800 4801 periphdriver_init(2); 4802 /* 4803 * Check for devices with no "standard" peripheral driver 4804 * attached. For any devices like that, announce the 4805 * passthrough driver so the user will see something. 4806 */ 4807 xpt_for_all_devices(xptpassannouncefunc, NULL); 4808 4809 /* Release our hook so that the boot can continue. */ 4810 config_intrhook_disestablish(xsoftc.xpt_config_hook); 4811 free(xsoftc.xpt_config_hook, M_CAMXPT); 4812 xsoftc.xpt_config_hook = NULL; 4813 4814 free(context, M_CAMXPT); 4815 } 4816 4817 cam_status 4818 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 4819 struct cam_path *path) 4820 { 4821 struct ccb_setasync csa; 4822 cam_status status; 4823 int xptpath = 0; 4824 4825 if (path == NULL) { 4826 mtx_lock(&xsoftc.xpt_lock); 4827 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 4828 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4829 if (status != CAM_REQ_CMP) { 4830 mtx_unlock(&xsoftc.xpt_lock); 4831 return (status); 4832 } 4833 xptpath = 1; 4834 } 4835 4836 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 4837 csa.ccb_h.func_code = XPT_SASYNC_CB; 4838 csa.event_enable = event; 4839 csa.callback = cbfunc; 4840 csa.callback_arg = cbarg; 4841 xpt_action((union ccb *)&csa); 4842 status = csa.ccb_h.status; 4843 if (xptpath) { 4844 xpt_free_path(path); 4845 mtx_unlock(&xsoftc.xpt_lock); 4846 4847 if ((status == CAM_REQ_CMP) && 4848 (csa.event_enable & AC_FOUND_DEVICE)) { 4849 /* 4850 * Get this peripheral up to date with all 4851 * the currently existing devices. 4852 */ 4853 xpt_for_all_devices(xptsetasyncfunc, &csa); 4854 } 4855 if ((status == CAM_REQ_CMP) && 4856 (csa.event_enable & AC_PATH_REGISTERED)) { 4857 /* 4858 * Get this peripheral up to date with all 4859 * the currently existing busses. 4860 */ 4861 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 4862 } 4863 } 4864 return (status); 4865 } 4866 4867 static void 4868 xptaction(struct cam_sim *sim, union ccb *work_ccb) 4869 { 4870 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 4871 4872 switch (work_ccb->ccb_h.func_code) { 4873 /* Common cases first */ 4874 case XPT_PATH_INQ: /* Path routing inquiry */ 4875 { 4876 struct ccb_pathinq *cpi; 4877 4878 cpi = &work_ccb->cpi; 4879 cpi->version_num = 1; /* XXX??? */ 4880 cpi->hba_inquiry = 0; 4881 cpi->target_sprt = 0; 4882 cpi->hba_misc = 0; 4883 cpi->hba_eng_cnt = 0; 4884 cpi->max_target = 0; 4885 cpi->max_lun = 0; 4886 cpi->initiator_id = 0; 4887 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 4888 strncpy(cpi->hba_vid, "", HBA_IDLEN); 4889 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 4890 cpi->unit_number = sim->unit_number; 4891 cpi->bus_id = sim->bus_id; 4892 cpi->base_transfer_speed = 0; 4893 cpi->protocol = PROTO_UNSPECIFIED; 4894 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 4895 cpi->transport = XPORT_UNSPECIFIED; 4896 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 4897 cpi->ccb_h.status = CAM_REQ_CMP; 4898 xpt_done(work_ccb); 4899 break; 4900 } 4901 default: 4902 work_ccb->ccb_h.status = CAM_REQ_INVALID; 4903 xpt_done(work_ccb); 4904 break; 4905 } 4906 } 4907 4908 /* 4909 * The xpt as a "controller" has no interrupt sources, so polling 4910 * is a no-op. 4911 */ 4912 static void 4913 xptpoll(struct cam_sim *sim) 4914 { 4915 } 4916 4917 void 4918 xpt_lock_buses(void) 4919 { 4920 mtx_lock(&xsoftc.xpt_topo_lock); 4921 } 4922 4923 void 4924 xpt_unlock_buses(void) 4925 { 4926 mtx_unlock(&xsoftc.xpt_topo_lock); 4927 } 4928 4929 static void 4930 camisr(void *dummy) 4931 { 4932 cam_simq_t queue; 4933 struct cam_sim *sim; 4934 4935 mtx_lock(&cam_simq_lock); 4936 TAILQ_INIT(&queue); 4937 while (!TAILQ_EMPTY(&cam_simq)) { 4938 TAILQ_CONCAT(&queue, &cam_simq, links); 4939 mtx_unlock(&cam_simq_lock); 4940 4941 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 4942 TAILQ_REMOVE(&queue, sim, links); 4943 CAM_SIM_LOCK(sim); 4944 camisr_runqueue(&sim->sim_doneq); 4945 sim->flags &= ~CAM_SIM_ON_DONEQ; 4946 CAM_SIM_UNLOCK(sim); 4947 } 4948 mtx_lock(&cam_simq_lock); 4949 } 4950 mtx_unlock(&cam_simq_lock); 4951 } 4952 4953 static void 4954 camisr_runqueue(void *V_queue) 4955 { 4956 cam_isrq_t *queue = V_queue; 4957 struct ccb_hdr *ccb_h; 4958 4959 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 4960 int runq; 4961 4962 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 4963 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 4964 4965 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 4966 ("camisr\n")); 4967 4968 runq = FALSE; 4969 4970 if (ccb_h->flags & CAM_HIGH_POWER) { 4971 struct highpowerlist *hphead; 4972 union ccb *send_ccb; 4973 4974 mtx_lock(&xsoftc.xpt_lock); 4975 hphead = &xsoftc.highpowerq; 4976 4977 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 4978 4979 /* 4980 * Increment the count since this command is done. 4981 */ 4982 xsoftc.num_highpower++; 4983 4984 /* 4985 * Any high powered commands queued up? 4986 */ 4987 if (send_ccb != NULL) { 4988 4989 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 4990 mtx_unlock(&xsoftc.xpt_lock); 4991 4992 xpt_release_devq(send_ccb->ccb_h.path, 4993 /*count*/1, /*runqueue*/TRUE); 4994 } else 4995 mtx_unlock(&xsoftc.xpt_lock); 4996 } 4997 4998 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 4999 struct cam_ed *dev; 5000 5001 dev = ccb_h->path->device; 5002 5003 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5004 ccb_h->path->bus->sim->devq->send_active--; 5005 ccb_h->path->bus->sim->devq->send_openings++; 5006 runq = TRUE; 5007 5008 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5009 && (dev->ccbq.dev_active == 0))) { 5010 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5011 xpt_release_devq(ccb_h->path, /*count*/1, 5012 /*run_queue*/FALSE); 5013 } 5014 5015 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5016 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5017 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5018 xpt_release_devq(ccb_h->path, /*count*/1, 5019 /*run_queue*/FALSE); 5020 } 5021 5022 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5023 && (--dev->tag_delay_count == 0)) 5024 xpt_start_tags(ccb_h->path); 5025 if (!device_is_send_queued(dev)) 5026 xpt_schedule_dev_sendq(ccb_h->path->bus, dev); 5027 } 5028 5029 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5030 xpt_release_simq(ccb_h->path->bus->sim, 5031 /*run_queue*/TRUE); 5032 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5033 runq = FALSE; 5034 } 5035 5036 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5037 && (ccb_h->status & CAM_DEV_QFRZN)) { 5038 xpt_release_devq(ccb_h->path, /*count*/1, 5039 /*run_queue*/TRUE); 5040 ccb_h->status &= ~CAM_DEV_QFRZN; 5041 } else if (runq) { 5042 xpt_run_dev_sendq(ccb_h->path->bus); 5043 } 5044 5045 /* Call the peripheral driver's callback */ 5046 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5047 } 5048 }
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