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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("$FreeBSD$"); 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 void 1103 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1104 { 1105 if (quirks != 0) { 1106 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1107 periph->unit_number, quirks, bit_string); 1108 } 1109 } 1110 1111 static dev_match_ret 1112 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1113 struct cam_eb *bus) 1114 { 1115 dev_match_ret retval; 1116 int i; 1117 1118 retval = DM_RET_NONE; 1119 1120 /* 1121 * If we aren't given something to match against, that's an error. 1122 */ 1123 if (bus == NULL) 1124 return(DM_RET_ERROR); 1125 1126 /* 1127 * If there are no match entries, then this bus matches no 1128 * matter what. 1129 */ 1130 if ((patterns == NULL) || (num_patterns == 0)) 1131 return(DM_RET_DESCEND | DM_RET_COPY); 1132 1133 for (i = 0; i < num_patterns; i++) { 1134 struct bus_match_pattern *cur_pattern; 1135 1136 /* 1137 * If the pattern in question isn't for a bus node, we 1138 * aren't interested. However, we do indicate to the 1139 * calling routine that we should continue descending the 1140 * tree, since the user wants to match against lower-level 1141 * EDT elements. 1142 */ 1143 if (patterns[i].type != DEV_MATCH_BUS) { 1144 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1145 retval |= DM_RET_DESCEND; 1146 continue; 1147 } 1148 1149 cur_pattern = &patterns[i].pattern.bus_pattern; 1150 1151 /* 1152 * If they want to match any bus node, we give them any 1153 * device node. 1154 */ 1155 if (cur_pattern->flags == BUS_MATCH_ANY) { 1156 /* set the copy flag */ 1157 retval |= DM_RET_COPY; 1158 1159 /* 1160 * If we've already decided on an action, go ahead 1161 * and return. 1162 */ 1163 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1164 return(retval); 1165 } 1166 1167 /* 1168 * Not sure why someone would do this... 1169 */ 1170 if (cur_pattern->flags == BUS_MATCH_NONE) 1171 continue; 1172 1173 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1174 && (cur_pattern->path_id != bus->path_id)) 1175 continue; 1176 1177 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1178 && (cur_pattern->bus_id != bus->sim->bus_id)) 1179 continue; 1180 1181 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1182 && (cur_pattern->unit_number != bus->sim->unit_number)) 1183 continue; 1184 1185 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1186 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1187 DEV_IDLEN) != 0)) 1188 continue; 1189 1190 /* 1191 * If we get to this point, the user definitely wants 1192 * information on this bus. So tell the caller to copy the 1193 * data out. 1194 */ 1195 retval |= DM_RET_COPY; 1196 1197 /* 1198 * If the return action has been set to descend, then we 1199 * know that we've already seen a non-bus matching 1200 * expression, therefore we need to further descend the tree. 1201 * This won't change by continuing around the loop, so we 1202 * go ahead and return. If we haven't seen a non-bus 1203 * matching expression, we keep going around the loop until 1204 * we exhaust the matching expressions. We'll set the stop 1205 * flag once we fall out of the loop. 1206 */ 1207 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1208 return(retval); 1209 } 1210 1211 /* 1212 * If the return action hasn't been set to descend yet, that means 1213 * we haven't seen anything other than bus matching patterns. So 1214 * tell the caller to stop descending the tree -- the user doesn't 1215 * want to match against lower level tree elements. 1216 */ 1217 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1218 retval |= DM_RET_STOP; 1219 1220 return(retval); 1221 } 1222 1223 static dev_match_ret 1224 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1225 struct cam_ed *device) 1226 { 1227 dev_match_ret retval; 1228 int i; 1229 1230 retval = DM_RET_NONE; 1231 1232 /* 1233 * If we aren't given something to match against, that's an error. 1234 */ 1235 if (device == NULL) 1236 return(DM_RET_ERROR); 1237 1238 /* 1239 * If there are no match entries, then this device matches no 1240 * matter what. 1241 */ 1242 if ((patterns == NULL) || (num_patterns == 0)) 1243 return(DM_RET_DESCEND | DM_RET_COPY); 1244 1245 for (i = 0; i < num_patterns; i++) { 1246 struct device_match_pattern *cur_pattern; 1247 1248 /* 1249 * If the pattern in question isn't for a device node, we 1250 * aren't interested. 1251 */ 1252 if (patterns[i].type != DEV_MATCH_DEVICE) { 1253 if ((patterns[i].type == DEV_MATCH_PERIPH) 1254 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1255 retval |= DM_RET_DESCEND; 1256 continue; 1257 } 1258 1259 cur_pattern = &patterns[i].pattern.device_pattern; 1260 1261 /* 1262 * If they want to match any device node, we give them any 1263 * device node. 1264 */ 1265 if (cur_pattern->flags == DEV_MATCH_ANY) { 1266 /* set the copy flag */ 1267 retval |= DM_RET_COPY; 1268 1269 1270 /* 1271 * If we've already decided on an action, go ahead 1272 * and return. 1273 */ 1274 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1275 return(retval); 1276 } 1277 1278 /* 1279 * Not sure why someone would do this... 1280 */ 1281 if (cur_pattern->flags == DEV_MATCH_NONE) 1282 continue; 1283 1284 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1285 && (cur_pattern->path_id != device->target->bus->path_id)) 1286 continue; 1287 1288 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1289 && (cur_pattern->target_id != device->target->target_id)) 1290 continue; 1291 1292 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1293 && (cur_pattern->target_lun != device->lun_id)) 1294 continue; 1295 1296 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1297 && (cam_quirkmatch((caddr_t)&device->inq_data, 1298 (caddr_t)&cur_pattern->inq_pat, 1299 1, sizeof(cur_pattern->inq_pat), 1300 scsi_static_inquiry_match) == NULL)) 1301 continue; 1302 1303 /* 1304 * If we get to this point, the user definitely wants 1305 * information on this device. So tell the caller to copy 1306 * the data out. 1307 */ 1308 retval |= DM_RET_COPY; 1309 1310 /* 1311 * If the return action has been set to descend, then we 1312 * know that we've already seen a peripheral matching 1313 * expression, therefore we need to further descend the tree. 1314 * This won't change by continuing around the loop, so we 1315 * go ahead and return. If we haven't seen a peripheral 1316 * matching expression, we keep going around the loop until 1317 * we exhaust the matching expressions. We'll set the stop 1318 * flag once we fall out of the loop. 1319 */ 1320 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1321 return(retval); 1322 } 1323 1324 /* 1325 * If the return action hasn't been set to descend yet, that means 1326 * we haven't seen any peripheral matching patterns. So tell the 1327 * caller to stop descending the tree -- the user doesn't want to 1328 * match against lower level tree elements. 1329 */ 1330 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1331 retval |= DM_RET_STOP; 1332 1333 return(retval); 1334 } 1335 1336 /* 1337 * Match a single peripheral against any number of match patterns. 1338 */ 1339 static dev_match_ret 1340 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1341 struct cam_periph *periph) 1342 { 1343 dev_match_ret retval; 1344 int i; 1345 1346 /* 1347 * If we aren't given something to match against, that's an error. 1348 */ 1349 if (periph == NULL) 1350 return(DM_RET_ERROR); 1351 1352 /* 1353 * If there are no match entries, then this peripheral matches no 1354 * matter what. 1355 */ 1356 if ((patterns == NULL) || (num_patterns == 0)) 1357 return(DM_RET_STOP | DM_RET_COPY); 1358 1359 /* 1360 * There aren't any nodes below a peripheral node, so there's no 1361 * reason to descend the tree any further. 1362 */ 1363 retval = DM_RET_STOP; 1364 1365 for (i = 0; i < num_patterns; i++) { 1366 struct periph_match_pattern *cur_pattern; 1367 1368 /* 1369 * If the pattern in question isn't for a peripheral, we 1370 * aren't interested. 1371 */ 1372 if (patterns[i].type != DEV_MATCH_PERIPH) 1373 continue; 1374 1375 cur_pattern = &patterns[i].pattern.periph_pattern; 1376 1377 /* 1378 * If they want to match on anything, then we will do so. 1379 */ 1380 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1381 /* set the copy flag */ 1382 retval |= DM_RET_COPY; 1383 1384 /* 1385 * We've already set the return action to stop, 1386 * since there are no nodes below peripherals in 1387 * the tree. 1388 */ 1389 return(retval); 1390 } 1391 1392 /* 1393 * Not sure why someone would do this... 1394 */ 1395 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1396 continue; 1397 1398 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1399 && (cur_pattern->path_id != periph->path->bus->path_id)) 1400 continue; 1401 1402 /* 1403 * For the target and lun id's, we have to make sure the 1404 * target and lun pointers aren't NULL. The xpt peripheral 1405 * has a wildcard target and device. 1406 */ 1407 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1408 && ((periph->path->target == NULL) 1409 ||(cur_pattern->target_id != periph->path->target->target_id))) 1410 continue; 1411 1412 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1413 && ((periph->path->device == NULL) 1414 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1415 continue; 1416 1417 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1418 && (cur_pattern->unit_number != periph->unit_number)) 1419 continue; 1420 1421 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1422 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1423 DEV_IDLEN) != 0)) 1424 continue; 1425 1426 /* 1427 * If we get to this point, the user definitely wants 1428 * information on this peripheral. So tell the caller to 1429 * copy the data out. 1430 */ 1431 retval |= DM_RET_COPY; 1432 1433 /* 1434 * The return action has already been set to stop, since 1435 * peripherals don't have any nodes below them in the EDT. 1436 */ 1437 return(retval); 1438 } 1439 1440 /* 1441 * If we get to this point, the peripheral that was passed in 1442 * doesn't match any of the patterns. 1443 */ 1444 return(retval); 1445 } 1446 1447 static int 1448 xptedtbusfunc(struct cam_eb *bus, void *arg) 1449 { 1450 struct ccb_dev_match *cdm; 1451 dev_match_ret retval; 1452 1453 cdm = (struct ccb_dev_match *)arg; 1454 1455 /* 1456 * If our position is for something deeper in the tree, that means 1457 * that we've already seen this node. So, we keep going down. 1458 */ 1459 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1460 && (cdm->pos.cookie.bus == bus) 1461 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1462 && (cdm->pos.cookie.target != NULL)) 1463 retval = DM_RET_DESCEND; 1464 else 1465 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1466 1467 /* 1468 * If we got an error, bail out of the search. 1469 */ 1470 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1471 cdm->status = CAM_DEV_MATCH_ERROR; 1472 return(0); 1473 } 1474 1475 /* 1476 * If the copy flag is set, copy this bus out. 1477 */ 1478 if (retval & DM_RET_COPY) { 1479 int spaceleft, j; 1480 1481 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1482 sizeof(struct dev_match_result)); 1483 1484 /* 1485 * If we don't have enough space to put in another 1486 * match result, save our position and tell the 1487 * user there are more devices to check. 1488 */ 1489 if (spaceleft < sizeof(struct dev_match_result)) { 1490 bzero(&cdm->pos, sizeof(cdm->pos)); 1491 cdm->pos.position_type = 1492 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1493 1494 cdm->pos.cookie.bus = bus; 1495 cdm->pos.generations[CAM_BUS_GENERATION]= 1496 xsoftc.bus_generation; 1497 cdm->status = CAM_DEV_MATCH_MORE; 1498 return(0); 1499 } 1500 j = cdm->num_matches; 1501 cdm->num_matches++; 1502 cdm->matches[j].type = DEV_MATCH_BUS; 1503 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1504 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1505 cdm->matches[j].result.bus_result.unit_number = 1506 bus->sim->unit_number; 1507 strncpy(cdm->matches[j].result.bus_result.dev_name, 1508 bus->sim->sim_name, DEV_IDLEN); 1509 } 1510 1511 /* 1512 * If the user is only interested in busses, there's no 1513 * reason to descend to the next level in the tree. 1514 */ 1515 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1516 return(1); 1517 1518 /* 1519 * If there is a target generation recorded, check it to 1520 * make sure the target list hasn't changed. 1521 */ 1522 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1523 && (bus == cdm->pos.cookie.bus) 1524 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1525 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1526 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1527 bus->generation)) { 1528 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1529 return(0); 1530 } 1531 1532 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1533 && (cdm->pos.cookie.bus == bus) 1534 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1535 && (cdm->pos.cookie.target != NULL)) 1536 return(xpttargettraverse(bus, 1537 (struct cam_et *)cdm->pos.cookie.target, 1538 xptedttargetfunc, arg)); 1539 else 1540 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1541 } 1542 1543 static int 1544 xptedttargetfunc(struct cam_et *target, void *arg) 1545 { 1546 struct ccb_dev_match *cdm; 1547 1548 cdm = (struct ccb_dev_match *)arg; 1549 1550 /* 1551 * If there is a device list generation recorded, check it to 1552 * make sure the device list hasn't changed. 1553 */ 1554 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1555 && (cdm->pos.cookie.bus == target->bus) 1556 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1557 && (cdm->pos.cookie.target == target) 1558 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1559 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1560 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1561 target->generation)) { 1562 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1563 return(0); 1564 } 1565 1566 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1567 && (cdm->pos.cookie.bus == target->bus) 1568 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1569 && (cdm->pos.cookie.target == target) 1570 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1571 && (cdm->pos.cookie.device != NULL)) 1572 return(xptdevicetraverse(target, 1573 (struct cam_ed *)cdm->pos.cookie.device, 1574 xptedtdevicefunc, arg)); 1575 else 1576 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 1577 } 1578 1579 static int 1580 xptedtdevicefunc(struct cam_ed *device, void *arg) 1581 { 1582 1583 struct ccb_dev_match *cdm; 1584 dev_match_ret retval; 1585 1586 cdm = (struct ccb_dev_match *)arg; 1587 1588 /* 1589 * If our position is for something deeper in the tree, that means 1590 * that we've already seen this node. So, we keep going down. 1591 */ 1592 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1593 && (cdm->pos.cookie.device == device) 1594 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1595 && (cdm->pos.cookie.periph != NULL)) 1596 retval = DM_RET_DESCEND; 1597 else 1598 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1599 device); 1600 1601 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1602 cdm->status = CAM_DEV_MATCH_ERROR; 1603 return(0); 1604 } 1605 1606 /* 1607 * If the copy flag is set, copy this device out. 1608 */ 1609 if (retval & DM_RET_COPY) { 1610 int spaceleft, j; 1611 1612 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1613 sizeof(struct dev_match_result)); 1614 1615 /* 1616 * If we don't have enough space to put in another 1617 * match result, save our position and tell the 1618 * user there are more devices to check. 1619 */ 1620 if (spaceleft < sizeof(struct dev_match_result)) { 1621 bzero(&cdm->pos, sizeof(cdm->pos)); 1622 cdm->pos.position_type = 1623 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1624 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1625 1626 cdm->pos.cookie.bus = device->target->bus; 1627 cdm->pos.generations[CAM_BUS_GENERATION]= 1628 xsoftc.bus_generation; 1629 cdm->pos.cookie.target = device->target; 1630 cdm->pos.generations[CAM_TARGET_GENERATION] = 1631 device->target->bus->generation; 1632 cdm->pos.cookie.device = device; 1633 cdm->pos.generations[CAM_DEV_GENERATION] = 1634 device->target->generation; 1635 cdm->status = CAM_DEV_MATCH_MORE; 1636 return(0); 1637 } 1638 j = cdm->num_matches; 1639 cdm->num_matches++; 1640 cdm->matches[j].type = DEV_MATCH_DEVICE; 1641 cdm->matches[j].result.device_result.path_id = 1642 device->target->bus->path_id; 1643 cdm->matches[j].result.device_result.target_id = 1644 device->target->target_id; 1645 cdm->matches[j].result.device_result.target_lun = 1646 device->lun_id; 1647 cdm->matches[j].result.device_result.protocol = 1648 device->protocol; 1649 bcopy(&device->inq_data, 1650 &cdm->matches[j].result.device_result.inq_data, 1651 sizeof(struct scsi_inquiry_data)); 1652 bcopy(&device->ident_data, 1653 &cdm->matches[j].result.device_result.ident_data, 1654 sizeof(struct ata_params)); 1655 1656 /* Let the user know whether this device is unconfigured */ 1657 if (device->flags & CAM_DEV_UNCONFIGURED) 1658 cdm->matches[j].result.device_result.flags = 1659 DEV_RESULT_UNCONFIGURED; 1660 else 1661 cdm->matches[j].result.device_result.flags = 1662 DEV_RESULT_NOFLAG; 1663 } 1664 1665 /* 1666 * If the user isn't interested in peripherals, don't descend 1667 * the tree any further. 1668 */ 1669 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1670 return(1); 1671 1672 /* 1673 * If there is a peripheral list generation recorded, make sure 1674 * it hasn't changed. 1675 */ 1676 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1677 && (device->target->bus == cdm->pos.cookie.bus) 1678 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1679 && (device->target == cdm->pos.cookie.target) 1680 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1681 && (device == cdm->pos.cookie.device) 1682 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1683 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1684 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1685 device->generation)){ 1686 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1687 return(0); 1688 } 1689 1690 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1691 && (cdm->pos.cookie.bus == device->target->bus) 1692 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1693 && (cdm->pos.cookie.target == device->target) 1694 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1695 && (cdm->pos.cookie.device == device) 1696 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1697 && (cdm->pos.cookie.periph != NULL)) 1698 return(xptperiphtraverse(device, 1699 (struct cam_periph *)cdm->pos.cookie.periph, 1700 xptedtperiphfunc, arg)); 1701 else 1702 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 1703 } 1704 1705 static int 1706 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1707 { 1708 struct ccb_dev_match *cdm; 1709 dev_match_ret retval; 1710 1711 cdm = (struct ccb_dev_match *)arg; 1712 1713 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1714 1715 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1716 cdm->status = CAM_DEV_MATCH_ERROR; 1717 return(0); 1718 } 1719 1720 /* 1721 * If the copy flag is set, copy this peripheral out. 1722 */ 1723 if (retval & DM_RET_COPY) { 1724 int spaceleft, j; 1725 1726 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1727 sizeof(struct dev_match_result)); 1728 1729 /* 1730 * If we don't have enough space to put in another 1731 * match result, save our position and tell the 1732 * user there are more devices to check. 1733 */ 1734 if (spaceleft < sizeof(struct dev_match_result)) { 1735 bzero(&cdm->pos, sizeof(cdm->pos)); 1736 cdm->pos.position_type = 1737 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1738 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1739 CAM_DEV_POS_PERIPH; 1740 1741 cdm->pos.cookie.bus = periph->path->bus; 1742 cdm->pos.generations[CAM_BUS_GENERATION]= 1743 xsoftc.bus_generation; 1744 cdm->pos.cookie.target = periph->path->target; 1745 cdm->pos.generations[CAM_TARGET_GENERATION] = 1746 periph->path->bus->generation; 1747 cdm->pos.cookie.device = periph->path->device; 1748 cdm->pos.generations[CAM_DEV_GENERATION] = 1749 periph->path->target->generation; 1750 cdm->pos.cookie.periph = periph; 1751 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1752 periph->path->device->generation; 1753 cdm->status = CAM_DEV_MATCH_MORE; 1754 return(0); 1755 } 1756 1757 j = cdm->num_matches; 1758 cdm->num_matches++; 1759 cdm->matches[j].type = DEV_MATCH_PERIPH; 1760 cdm->matches[j].result.periph_result.path_id = 1761 periph->path->bus->path_id; 1762 cdm->matches[j].result.periph_result.target_id = 1763 periph->path->target->target_id; 1764 cdm->matches[j].result.periph_result.target_lun = 1765 periph->path->device->lun_id; 1766 cdm->matches[j].result.periph_result.unit_number = 1767 periph->unit_number; 1768 strncpy(cdm->matches[j].result.periph_result.periph_name, 1769 periph->periph_name, DEV_IDLEN); 1770 } 1771 1772 return(1); 1773 } 1774 1775 static int 1776 xptedtmatch(struct ccb_dev_match *cdm) 1777 { 1778 int ret; 1779 1780 cdm->num_matches = 0; 1781 1782 /* 1783 * Check the bus list generation. If it has changed, the user 1784 * needs to reset everything and start over. 1785 */ 1786 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1787 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 1788 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 1789 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1790 return(0); 1791 } 1792 1793 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1794 && (cdm->pos.cookie.bus != NULL)) 1795 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 1796 xptedtbusfunc, cdm); 1797 else 1798 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 1799 1800 /* 1801 * If we get back 0, that means that we had to stop before fully 1802 * traversing the EDT. It also means that one of the subroutines 1803 * has set the status field to the proper value. If we get back 1, 1804 * we've fully traversed the EDT and copied out any matching entries. 1805 */ 1806 if (ret == 1) 1807 cdm->status = CAM_DEV_MATCH_LAST; 1808 1809 return(ret); 1810 } 1811 1812 static int 1813 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1814 { 1815 struct ccb_dev_match *cdm; 1816 1817 cdm = (struct ccb_dev_match *)arg; 1818 1819 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1820 && (cdm->pos.cookie.pdrv == pdrv) 1821 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1822 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 1823 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1824 (*pdrv)->generation)) { 1825 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1826 return(0); 1827 } 1828 1829 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1830 && (cdm->pos.cookie.pdrv == pdrv) 1831 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1832 && (cdm->pos.cookie.periph != NULL)) 1833 return(xptpdperiphtraverse(pdrv, 1834 (struct cam_periph *)cdm->pos.cookie.periph, 1835 xptplistperiphfunc, arg)); 1836 else 1837 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 1838 } 1839 1840 static int 1841 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1842 { 1843 struct ccb_dev_match *cdm; 1844 dev_match_ret retval; 1845 1846 cdm = (struct ccb_dev_match *)arg; 1847 1848 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1849 1850 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1851 cdm->status = CAM_DEV_MATCH_ERROR; 1852 return(0); 1853 } 1854 1855 /* 1856 * If the copy flag is set, copy this peripheral out. 1857 */ 1858 if (retval & DM_RET_COPY) { 1859 int spaceleft, j; 1860 1861 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1862 sizeof(struct dev_match_result)); 1863 1864 /* 1865 * If we don't have enough space to put in another 1866 * match result, save our position and tell the 1867 * user there are more devices to check. 1868 */ 1869 if (spaceleft < sizeof(struct dev_match_result)) { 1870 struct periph_driver **pdrv; 1871 1872 pdrv = NULL; 1873 bzero(&cdm->pos, sizeof(cdm->pos)); 1874 cdm->pos.position_type = 1875 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 1876 CAM_DEV_POS_PERIPH; 1877 1878 /* 1879 * This may look a bit non-sensical, but it is 1880 * actually quite logical. There are very few 1881 * peripheral drivers, and bloating every peripheral 1882 * structure with a pointer back to its parent 1883 * peripheral driver linker set entry would cost 1884 * more in the long run than doing this quick lookup. 1885 */ 1886 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 1887 if (strcmp((*pdrv)->driver_name, 1888 periph->periph_name) == 0) 1889 break; 1890 } 1891 1892 if (*pdrv == NULL) { 1893 cdm->status = CAM_DEV_MATCH_ERROR; 1894 return(0); 1895 } 1896 1897 cdm->pos.cookie.pdrv = pdrv; 1898 /* 1899 * The periph generation slot does double duty, as 1900 * does the periph pointer slot. They are used for 1901 * both edt and pdrv lookups and positioning. 1902 */ 1903 cdm->pos.cookie.periph = periph; 1904 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1905 (*pdrv)->generation; 1906 cdm->status = CAM_DEV_MATCH_MORE; 1907 return(0); 1908 } 1909 1910 j = cdm->num_matches; 1911 cdm->num_matches++; 1912 cdm->matches[j].type = DEV_MATCH_PERIPH; 1913 cdm->matches[j].result.periph_result.path_id = 1914 periph->path->bus->path_id; 1915 1916 /* 1917 * The transport layer peripheral doesn't have a target or 1918 * lun. 1919 */ 1920 if (periph->path->target) 1921 cdm->matches[j].result.periph_result.target_id = 1922 periph->path->target->target_id; 1923 else 1924 cdm->matches[j].result.periph_result.target_id = -1; 1925 1926 if (periph->path->device) 1927 cdm->matches[j].result.periph_result.target_lun = 1928 periph->path->device->lun_id; 1929 else 1930 cdm->matches[j].result.periph_result.target_lun = -1; 1931 1932 cdm->matches[j].result.periph_result.unit_number = 1933 periph->unit_number; 1934 strncpy(cdm->matches[j].result.periph_result.periph_name, 1935 periph->periph_name, DEV_IDLEN); 1936 } 1937 1938 return(1); 1939 } 1940 1941 static int 1942 xptperiphlistmatch(struct ccb_dev_match *cdm) 1943 { 1944 int ret; 1945 1946 cdm->num_matches = 0; 1947 1948 /* 1949 * At this point in the edt traversal function, we check the bus 1950 * list generation to make sure that no busses have been added or 1951 * removed since the user last sent a XPT_DEV_MATCH ccb through. 1952 * For the peripheral driver list traversal function, however, we 1953 * don't have to worry about new peripheral driver types coming or 1954 * going; they're in a linker set, and therefore can't change 1955 * without a recompile. 1956 */ 1957 1958 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1959 && (cdm->pos.cookie.pdrv != NULL)) 1960 ret = xptpdrvtraverse( 1961 (struct periph_driver **)cdm->pos.cookie.pdrv, 1962 xptplistpdrvfunc, cdm); 1963 else 1964 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 1965 1966 /* 1967 * If we get back 0, that means that we had to stop before fully 1968 * traversing the peripheral driver tree. It also means that one of 1969 * the subroutines has set the status field to the proper value. If 1970 * we get back 1, we've fully traversed the EDT and copied out any 1971 * matching entries. 1972 */ 1973 if (ret == 1) 1974 cdm->status = CAM_DEV_MATCH_LAST; 1975 1976 return(ret); 1977 } 1978 1979 static int 1980 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 1981 { 1982 struct cam_eb *bus, *next_bus; 1983 int retval; 1984 1985 retval = 1; 1986 1987 mtx_lock(&xsoftc.xpt_topo_lock); 1988 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 1989 bus != NULL; 1990 bus = next_bus) { 1991 1992 bus->refcount++; 1993 1994 /* 1995 * XXX The locking here is obviously very complex. We 1996 * should work to simplify it. 1997 */ 1998 mtx_unlock(&xsoftc.xpt_topo_lock); 1999 CAM_SIM_LOCK(bus->sim); 2000 retval = tr_func(bus, arg); 2001 CAM_SIM_UNLOCK(bus->sim); 2002 2003 mtx_lock(&xsoftc.xpt_topo_lock); 2004 next_bus = TAILQ_NEXT(bus, links); 2005 mtx_unlock(&xsoftc.xpt_topo_lock); 2006 2007 xpt_release_bus(bus); 2008 2009 if (retval == 0) 2010 return(retval); 2011 mtx_lock(&xsoftc.xpt_topo_lock); 2012 } 2013 mtx_unlock(&xsoftc.xpt_topo_lock); 2014 2015 return(retval); 2016 } 2017 2018 int 2019 xpt_sim_opened(struct cam_sim *sim) 2020 { 2021 struct cam_eb *bus; 2022 struct cam_et *target; 2023 struct cam_ed *device; 2024 struct cam_periph *periph; 2025 2026 KASSERT(sim->refcount >= 1, ("sim->refcount >= 1")); 2027 mtx_assert(sim->mtx, MA_OWNED); 2028 2029 mtx_lock(&xsoftc.xpt_topo_lock); 2030 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 2031 if (bus->sim != sim) 2032 continue; 2033 2034 TAILQ_FOREACH(target, &bus->et_entries, links) { 2035 TAILQ_FOREACH(device, &target->ed_entries, links) { 2036 SLIST_FOREACH(periph, &device->periphs, 2037 periph_links) { 2038 if (periph->refcount > 0) { 2039 mtx_unlock(&xsoftc.xpt_topo_lock); 2040 return (1); 2041 } 2042 } 2043 } 2044 } 2045 } 2046 2047 mtx_unlock(&xsoftc.xpt_topo_lock); 2048 return (0); 2049 } 2050 2051 static int 2052 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2053 xpt_targetfunc_t *tr_func, void *arg) 2054 { 2055 struct cam_et *target, *next_target; 2056 int retval; 2057 2058 retval = 1; 2059 for (target = (start_target ? start_target : 2060 TAILQ_FIRST(&bus->et_entries)); 2061 target != NULL; target = next_target) { 2062 2063 target->refcount++; 2064 2065 retval = tr_func(target, arg); 2066 2067 next_target = TAILQ_NEXT(target, links); 2068 2069 xpt_release_target(target); 2070 2071 if (retval == 0) 2072 return(retval); 2073 } 2074 2075 return(retval); 2076 } 2077 2078 static int 2079 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2080 xpt_devicefunc_t *tr_func, void *arg) 2081 { 2082 struct cam_ed *device, *next_device; 2083 int retval; 2084 2085 retval = 1; 2086 for (device = (start_device ? start_device : 2087 TAILQ_FIRST(&target->ed_entries)); 2088 device != NULL; 2089 device = next_device) { 2090 2091 /* 2092 * Hold a reference so the current device does not go away 2093 * on us. 2094 */ 2095 device->refcount++; 2096 2097 retval = tr_func(device, arg); 2098 2099 /* 2100 * Grab our next pointer before we release the current 2101 * device. 2102 */ 2103 next_device = TAILQ_NEXT(device, links); 2104 2105 xpt_release_device(device); 2106 2107 if (retval == 0) 2108 return(retval); 2109 } 2110 2111 return(retval); 2112 } 2113 2114 static int 2115 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2116 xpt_periphfunc_t *tr_func, void *arg) 2117 { 2118 struct cam_periph *periph, *next_periph; 2119 int retval; 2120 2121 retval = 1; 2122 2123 xpt_lock_buses(); 2124 for (periph = (start_periph ? start_periph : 2125 SLIST_FIRST(&device->periphs)); 2126 periph != NULL; 2127 periph = next_periph) { 2128 2129 2130 /* 2131 * In this case, we want to show peripherals that have been 2132 * invalidated, but not peripherals that are scheduled to 2133 * be freed. So instead of calling cam_periph_acquire(), 2134 * which will fail if the periph has been invalidated, we 2135 * just check for the free flag here. If it is free, we 2136 * skip to the next periph. 2137 */ 2138 if (periph->flags & CAM_PERIPH_FREE) { 2139 next_periph = SLIST_NEXT(periph, periph_links); 2140 continue; 2141 } 2142 2143 /* 2144 * Acquire a reference to this periph while we call the 2145 * traversal function, so it can't go away. 2146 */ 2147 periph->refcount++; 2148 2149 xpt_unlock_buses(); 2150 2151 retval = tr_func(periph, arg); 2152 2153 /* 2154 * We need the lock for list traversal. 2155 */ 2156 xpt_lock_buses(); 2157 2158 /* 2159 * Grab the next peripheral before we release this one, so 2160 * our next pointer is still valid. 2161 */ 2162 next_periph = SLIST_NEXT(periph, periph_links); 2163 2164 cam_periph_release_locked_buses(periph); 2165 2166 if (retval == 0) 2167 goto bailout_done; 2168 } 2169 2170 bailout_done: 2171 2172 xpt_unlock_buses(); 2173 2174 return(retval); 2175 } 2176 2177 static int 2178 xptpdrvtraverse(struct periph_driver **start_pdrv, 2179 xpt_pdrvfunc_t *tr_func, void *arg) 2180 { 2181 struct periph_driver **pdrv; 2182 int retval; 2183 2184 retval = 1; 2185 2186 /* 2187 * We don't traverse the peripheral driver list like we do the 2188 * other lists, because it is a linker set, and therefore cannot be 2189 * changed during runtime. If the peripheral driver list is ever 2190 * re-done to be something other than a linker set (i.e. it can 2191 * change while the system is running), the list traversal should 2192 * be modified to work like the other traversal functions. 2193 */ 2194 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2195 *pdrv != NULL; pdrv++) { 2196 retval = tr_func(pdrv, arg); 2197 2198 if (retval == 0) 2199 return(retval); 2200 } 2201 2202 return(retval); 2203 } 2204 2205 static int 2206 xptpdperiphtraverse(struct periph_driver **pdrv, 2207 struct cam_periph *start_periph, 2208 xpt_periphfunc_t *tr_func, void *arg) 2209 { 2210 struct cam_periph *periph, *next_periph; 2211 int retval; 2212 2213 retval = 1; 2214 2215 xpt_lock_buses(); 2216 for (periph = (start_periph ? start_periph : 2217 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2218 periph = next_periph) { 2219 2220 2221 /* 2222 * In this case, we want to show peripherals that have been 2223 * invalidated, but not peripherals that are scheduled to 2224 * be freed. So instead of calling cam_periph_acquire(), 2225 * which will fail if the periph has been invalidated, we 2226 * just check for the free flag here. If it is free, we 2227 * skip to the next periph. 2228 */ 2229 if (periph->flags & CAM_PERIPH_FREE) { 2230 next_periph = TAILQ_NEXT(periph, unit_links); 2231 continue; 2232 } 2233 2234 /* 2235 * Acquire a reference to this periph while we call the 2236 * traversal function, so it can't go away. 2237 */ 2238 periph->refcount++; 2239 2240 /* 2241 * XXX KDM we have the toplogy lock here, but in 2242 * xptperiphtraverse(), we drop it before calling the 2243 * traversal function. Which is correct? 2244 */ 2245 retval = tr_func(periph, arg); 2246 2247 /* 2248 * Grab the next peripheral before we release this one, so 2249 * our next pointer is still valid. 2250 */ 2251 next_periph = TAILQ_NEXT(periph, unit_links); 2252 2253 cam_periph_release_locked_buses(periph); 2254 2255 if (retval == 0) 2256 goto bailout_done; 2257 } 2258 bailout_done: 2259 2260 xpt_unlock_buses(); 2261 2262 return(retval); 2263 } 2264 2265 static int 2266 xptdefbusfunc(struct cam_eb *bus, void *arg) 2267 { 2268 struct xpt_traverse_config *tr_config; 2269 2270 tr_config = (struct xpt_traverse_config *)arg; 2271 2272 if (tr_config->depth == XPT_DEPTH_BUS) { 2273 xpt_busfunc_t *tr_func; 2274 2275 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2276 2277 return(tr_func(bus, tr_config->tr_arg)); 2278 } else 2279 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2280 } 2281 2282 static int 2283 xptdeftargetfunc(struct cam_et *target, void *arg) 2284 { 2285 struct xpt_traverse_config *tr_config; 2286 2287 tr_config = (struct xpt_traverse_config *)arg; 2288 2289 if (tr_config->depth == XPT_DEPTH_TARGET) { 2290 xpt_targetfunc_t *tr_func; 2291 2292 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2293 2294 return(tr_func(target, tr_config->tr_arg)); 2295 } else 2296 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2297 } 2298 2299 static int 2300 xptdefdevicefunc(struct cam_ed *device, void *arg) 2301 { 2302 struct xpt_traverse_config *tr_config; 2303 2304 tr_config = (struct xpt_traverse_config *)arg; 2305 2306 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2307 xpt_devicefunc_t *tr_func; 2308 2309 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2310 2311 return(tr_func(device, tr_config->tr_arg)); 2312 } else 2313 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2314 } 2315 2316 static int 2317 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2318 { 2319 struct xpt_traverse_config *tr_config; 2320 xpt_periphfunc_t *tr_func; 2321 2322 tr_config = (struct xpt_traverse_config *)arg; 2323 2324 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2325 2326 /* 2327 * Unlike the other default functions, we don't check for depth 2328 * here. The peripheral driver level is the last level in the EDT, 2329 * so if we're here, we should execute the function in question. 2330 */ 2331 return(tr_func(periph, tr_config->tr_arg)); 2332 } 2333 2334 /* 2335 * Execute the given function for every bus in the EDT. 2336 */ 2337 static int 2338 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2339 { 2340 struct xpt_traverse_config tr_config; 2341 2342 tr_config.depth = XPT_DEPTH_BUS; 2343 tr_config.tr_func = tr_func; 2344 tr_config.tr_arg = arg; 2345 2346 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2347 } 2348 2349 /* 2350 * Execute the given function for every device in the EDT. 2351 */ 2352 static int 2353 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2354 { 2355 struct xpt_traverse_config tr_config; 2356 2357 tr_config.depth = XPT_DEPTH_DEVICE; 2358 tr_config.tr_func = tr_func; 2359 tr_config.tr_arg = arg; 2360 2361 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2362 } 2363 2364 static int 2365 xptsetasyncfunc(struct cam_ed *device, void *arg) 2366 { 2367 struct cam_path path; 2368 struct ccb_getdev cgd; 2369 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2370 2371 /* 2372 * Don't report unconfigured devices (Wildcard devs, 2373 * devices only for target mode, device instances 2374 * that have been invalidated but are waiting for 2375 * their last reference count to be released). 2376 */ 2377 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2378 return (1); 2379 2380 xpt_compile_path(&path, 2381 NULL, 2382 device->target->bus->path_id, 2383 device->target->target_id, 2384 device->lun_id); 2385 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2386 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2387 xpt_action((union ccb *)&cgd); 2388 csa->callback(csa->callback_arg, 2389 AC_FOUND_DEVICE, 2390 &path, &cgd); 2391 xpt_release_path(&path); 2392 2393 return(1); 2394 } 2395 2396 static int 2397 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2398 { 2399 struct cam_path path; 2400 struct ccb_pathinq cpi; 2401 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2402 2403 xpt_compile_path(&path, /*periph*/NULL, 2404 bus->sim->path_id, 2405 CAM_TARGET_WILDCARD, 2406 CAM_LUN_WILDCARD); 2407 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2408 cpi.ccb_h.func_code = XPT_PATH_INQ; 2409 xpt_action((union ccb *)&cpi); 2410 csa->callback(csa->callback_arg, 2411 AC_PATH_REGISTERED, 2412 &path, &cpi); 2413 xpt_release_path(&path); 2414 2415 return(1); 2416 } 2417 2418 void 2419 xpt_action(union ccb *start_ccb) 2420 { 2421 2422 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2423 2424 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2425 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb); 2426 } 2427 2428 void 2429 xpt_action_default(union ccb *start_ccb) 2430 { 2431 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2432 struct cam_path *path; 2433 2434 path = start_ccb->ccb_h.path; 2435 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n")); 2436 2437 switch (start_ccb->ccb_h.func_code) { 2438 case XPT_SCSI_IO: 2439 { 2440 struct cam_ed *device; 2441 2442 /* 2443 * For the sake of compatibility with SCSI-1 2444 * devices that may not understand the identify 2445 * message, we include lun information in the 2446 * second byte of all commands. SCSI-1 specifies 2447 * that luns are a 3 bit value and reserves only 3 2448 * bits for lun information in the CDB. Later 2449 * revisions of the SCSI spec allow for more than 8 2450 * luns, but have deprecated lun information in the 2451 * CDB. So, if the lun won't fit, we must omit. 2452 * 2453 * Also be aware that during initial probing for devices, 2454 * the inquiry information is unknown but initialized to 0. 2455 * This means that this code will be exercised while probing 2456 * devices with an ANSI revision greater than 2. 2457 */ 2458 device = path->device; 2459 if (device->protocol_version <= SCSI_REV_2 2460 && start_ccb->ccb_h.target_lun < 8 2461 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2462 2463 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2464 start_ccb->ccb_h.target_lun << 5; 2465 } 2466 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2467 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2468 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2469 &path->device->inq_data), 2470 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2471 cdb_str, sizeof(cdb_str)))); 2472 } 2473 /* FALLTHROUGH */ 2474 case XPT_TARGET_IO: 2475 case XPT_CONT_TARGET_IO: 2476 start_ccb->csio.sense_resid = 0; 2477 start_ccb->csio.resid = 0; 2478 /* FALLTHROUGH */ 2479 case XPT_ATA_IO: 2480 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) { 2481 start_ccb->ataio.resid = 0; 2482 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. ACB: %s\n", 2483 ata_op_string(&start_ccb->ataio.cmd), 2484 ata_cmd_string(&start_ccb->ataio.cmd, 2485 cdb_str, sizeof(cdb_str)))); 2486 } 2487 /* FALLTHROUGH */ 2488 case XPT_RESET_DEV: 2489 case XPT_ENG_EXEC: 2490 { 2491 int frozen; 2492 2493 frozen = cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2494 path->device->sim->devq->alloc_openings += frozen; 2495 if (frozen > 0) 2496 xpt_run_dev_allocq(path->bus); 2497 if (xpt_schedule_dev_sendq(path->bus, path->device)) 2498 xpt_run_dev_sendq(path->bus); 2499 break; 2500 } 2501 case XPT_CALC_GEOMETRY: 2502 { 2503 struct cam_sim *sim; 2504 2505 /* Filter out garbage */ 2506 if (start_ccb->ccg.block_size == 0 2507 || start_ccb->ccg.volume_size == 0) { 2508 start_ccb->ccg.cylinders = 0; 2509 start_ccb->ccg.heads = 0; 2510 start_ccb->ccg.secs_per_track = 0; 2511 start_ccb->ccb_h.status = CAM_REQ_CMP; 2512 break; 2513 } 2514 #if defined(PC98) || defined(__sparc64__) 2515 /* 2516 * In a PC-98 system, geometry translation depens on 2517 * the "real" device geometry obtained from mode page 4. 2518 * SCSI geometry translation is performed in the 2519 * initialization routine of the SCSI BIOS and the result 2520 * stored in host memory. If the translation is available 2521 * in host memory, use it. If not, rely on the default 2522 * translation the device driver performs. 2523 * For sparc64, we may need adjust the geometry of large 2524 * disks in order to fit the limitations of the 16-bit 2525 * fields of the VTOC8 disk label. 2526 */ 2527 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2528 start_ccb->ccb_h.status = CAM_REQ_CMP; 2529 break; 2530 } 2531 #endif 2532 sim = path->bus->sim; 2533 (*(sim->sim_action))(sim, start_ccb); 2534 break; 2535 } 2536 case XPT_ABORT: 2537 { 2538 union ccb* abort_ccb; 2539 2540 abort_ccb = start_ccb->cab.abort_ccb; 2541 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2542 2543 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2544 struct cam_ccbq *ccbq; 2545 struct cam_ed *device; 2546 2547 device = abort_ccb->ccb_h.path->device; 2548 ccbq = &device->ccbq; 2549 device->sim->devq->alloc_openings -= 2550 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2551 abort_ccb->ccb_h.status = 2552 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2553 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2554 xpt_done(abort_ccb); 2555 start_ccb->ccb_h.status = CAM_REQ_CMP; 2556 break; 2557 } 2558 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2559 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2560 /* 2561 * We've caught this ccb en route to 2562 * the SIM. Flag it for abort and the 2563 * SIM will do so just before starting 2564 * real work on the CCB. 2565 */ 2566 abort_ccb->ccb_h.status = 2567 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2568 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2569 start_ccb->ccb_h.status = CAM_REQ_CMP; 2570 break; 2571 } 2572 } 2573 if (XPT_FC_IS_QUEUED(abort_ccb) 2574 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2575 /* 2576 * It's already completed but waiting 2577 * for our SWI to get to it. 2578 */ 2579 start_ccb->ccb_h.status = CAM_UA_ABORT; 2580 break; 2581 } 2582 /* 2583 * If we weren't able to take care of the abort request 2584 * in the XPT, pass the request down to the SIM for processing. 2585 */ 2586 } 2587 /* FALLTHROUGH */ 2588 case XPT_ACCEPT_TARGET_IO: 2589 case XPT_EN_LUN: 2590 case XPT_IMMED_NOTIFY: 2591 case XPT_NOTIFY_ACK: 2592 case XPT_RESET_BUS: 2593 case XPT_IMMEDIATE_NOTIFY: 2594 case XPT_NOTIFY_ACKNOWLEDGE: 2595 case XPT_GET_SIM_KNOB: 2596 case XPT_SET_SIM_KNOB: 2597 { 2598 struct cam_sim *sim; 2599 2600 sim = path->bus->sim; 2601 (*(sim->sim_action))(sim, start_ccb); 2602 break; 2603 } 2604 case XPT_PATH_INQ: 2605 { 2606 struct cam_sim *sim; 2607 2608 sim = path->bus->sim; 2609 (*(sim->sim_action))(sim, start_ccb); 2610 break; 2611 } 2612 case XPT_PATH_STATS: 2613 start_ccb->cpis.last_reset = path->bus->last_reset; 2614 start_ccb->ccb_h.status = CAM_REQ_CMP; 2615 break; 2616 case XPT_GDEV_TYPE: 2617 { 2618 struct cam_ed *dev; 2619 2620 dev = path->device; 2621 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2622 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2623 } else { 2624 struct ccb_getdev *cgd; 2625 2626 cgd = &start_ccb->cgd; 2627 cgd->protocol = dev->protocol; 2628 cgd->inq_data = dev->inq_data; 2629 cgd->ident_data = dev->ident_data; 2630 cgd->inq_flags = dev->inq_flags; 2631 cgd->ccb_h.status = CAM_REQ_CMP; 2632 cgd->serial_num_len = dev->serial_num_len; 2633 if ((dev->serial_num_len > 0) 2634 && (dev->serial_num != NULL)) 2635 bcopy(dev->serial_num, cgd->serial_num, 2636 dev->serial_num_len); 2637 } 2638 break; 2639 } 2640 case XPT_GDEV_STATS: 2641 { 2642 struct cam_ed *dev; 2643 2644 dev = path->device; 2645 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2646 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2647 } else { 2648 struct ccb_getdevstats *cgds; 2649 struct cam_eb *bus; 2650 struct cam_et *tar; 2651 2652 cgds = &start_ccb->cgds; 2653 bus = path->bus; 2654 tar = path->target; 2655 cgds->dev_openings = dev->ccbq.dev_openings; 2656 cgds->dev_active = dev->ccbq.dev_active; 2657 cgds->devq_openings = dev->ccbq.devq_openings; 2658 cgds->devq_queued = dev->ccbq.queue.entries; 2659 cgds->held = dev->ccbq.held; 2660 cgds->last_reset = tar->last_reset; 2661 cgds->maxtags = dev->maxtags; 2662 cgds->mintags = dev->mintags; 2663 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2664 cgds->last_reset = bus->last_reset; 2665 cgds->ccb_h.status = CAM_REQ_CMP; 2666 } 2667 break; 2668 } 2669 case XPT_GDEVLIST: 2670 { 2671 struct cam_periph *nperiph; 2672 struct periph_list *periph_head; 2673 struct ccb_getdevlist *cgdl; 2674 u_int i; 2675 struct cam_ed *device; 2676 int found; 2677 2678 2679 found = 0; 2680 2681 /* 2682 * Don't want anyone mucking with our data. 2683 */ 2684 device = path->device; 2685 periph_head = &device->periphs; 2686 cgdl = &start_ccb->cgdl; 2687 2688 /* 2689 * Check and see if the list has changed since the user 2690 * last requested a list member. If so, tell them that the 2691 * list has changed, and therefore they need to start over 2692 * from the beginning. 2693 */ 2694 if ((cgdl->index != 0) && 2695 (cgdl->generation != device->generation)) { 2696 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2697 break; 2698 } 2699 2700 /* 2701 * Traverse the list of peripherals and attempt to find 2702 * the requested peripheral. 2703 */ 2704 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2705 (nperiph != NULL) && (i <= cgdl->index); 2706 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2707 if (i == cgdl->index) { 2708 strncpy(cgdl->periph_name, 2709 nperiph->periph_name, 2710 DEV_IDLEN); 2711 cgdl->unit_number = nperiph->unit_number; 2712 found = 1; 2713 } 2714 } 2715 if (found == 0) { 2716 cgdl->status = CAM_GDEVLIST_ERROR; 2717 break; 2718 } 2719 2720 if (nperiph == NULL) 2721 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2722 else 2723 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2724 2725 cgdl->index++; 2726 cgdl->generation = device->generation; 2727 2728 cgdl->ccb_h.status = CAM_REQ_CMP; 2729 break; 2730 } 2731 case XPT_DEV_MATCH: 2732 { 2733 dev_pos_type position_type; 2734 struct ccb_dev_match *cdm; 2735 2736 cdm = &start_ccb->cdm; 2737 2738 /* 2739 * There are two ways of getting at information in the EDT. 2740 * The first way is via the primary EDT tree. It starts 2741 * with a list of busses, then a list of targets on a bus, 2742 * then devices/luns on a target, and then peripherals on a 2743 * device/lun. The "other" way is by the peripheral driver 2744 * lists. The peripheral driver lists are organized by 2745 * peripheral driver. (obviously) So it makes sense to 2746 * use the peripheral driver list if the user is looking 2747 * for something like "da1", or all "da" devices. If the 2748 * user is looking for something on a particular bus/target 2749 * or lun, it's generally better to go through the EDT tree. 2750 */ 2751 2752 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2753 position_type = cdm->pos.position_type; 2754 else { 2755 u_int i; 2756 2757 position_type = CAM_DEV_POS_NONE; 2758 2759 for (i = 0; i < cdm->num_patterns; i++) { 2760 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2761 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2762 position_type = CAM_DEV_POS_EDT; 2763 break; 2764 } 2765 } 2766 2767 if (cdm->num_patterns == 0) 2768 position_type = CAM_DEV_POS_EDT; 2769 else if (position_type == CAM_DEV_POS_NONE) 2770 position_type = CAM_DEV_POS_PDRV; 2771 } 2772 2773 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2774 case CAM_DEV_POS_EDT: 2775 xptedtmatch(cdm); 2776 break; 2777 case CAM_DEV_POS_PDRV: 2778 xptperiphlistmatch(cdm); 2779 break; 2780 default: 2781 cdm->status = CAM_DEV_MATCH_ERROR; 2782 break; 2783 } 2784 2785 if (cdm->status == CAM_DEV_MATCH_ERROR) 2786 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2787 else 2788 start_ccb->ccb_h.status = CAM_REQ_CMP; 2789 2790 break; 2791 } 2792 case XPT_SASYNC_CB: 2793 { 2794 struct ccb_setasync *csa; 2795 struct async_node *cur_entry; 2796 struct async_list *async_head; 2797 u_int32_t added; 2798 2799 csa = &start_ccb->csa; 2800 added = csa->event_enable; 2801 async_head = &path->device->asyncs; 2802 2803 /* 2804 * If there is already an entry for us, simply 2805 * update it. 2806 */ 2807 cur_entry = SLIST_FIRST(async_head); 2808 while (cur_entry != NULL) { 2809 if ((cur_entry->callback_arg == csa->callback_arg) 2810 && (cur_entry->callback == csa->callback)) 2811 break; 2812 cur_entry = SLIST_NEXT(cur_entry, links); 2813 } 2814 2815 if (cur_entry != NULL) { 2816 /* 2817 * If the request has no flags set, 2818 * remove the entry. 2819 */ 2820 added &= ~cur_entry->event_enable; 2821 if (csa->event_enable == 0) { 2822 SLIST_REMOVE(async_head, cur_entry, 2823 async_node, links); 2824 xpt_release_device(path->device); 2825 free(cur_entry, M_CAMXPT); 2826 } else { 2827 cur_entry->event_enable = csa->event_enable; 2828 } 2829 csa->event_enable = added; 2830 } else { 2831 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2832 M_NOWAIT); 2833 if (cur_entry == NULL) { 2834 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2835 break; 2836 } 2837 cur_entry->event_enable = csa->event_enable; 2838 cur_entry->callback_arg = csa->callback_arg; 2839 cur_entry->callback = csa->callback; 2840 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2841 xpt_acquire_device(path->device); 2842 } 2843 start_ccb->ccb_h.status = CAM_REQ_CMP; 2844 break; 2845 } 2846 case XPT_REL_SIMQ: 2847 { 2848 struct ccb_relsim *crs; 2849 struct cam_ed *dev; 2850 2851 crs = &start_ccb->crs; 2852 dev = path->device; 2853 if (dev == NULL) { 2854 2855 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2856 break; 2857 } 2858 2859 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2860 2861 /* Don't ever go below one opening */ 2862 if (crs->openings > 0) { 2863 xpt_dev_ccbq_resize(path, crs->openings); 2864 if (bootverbose) { 2865 xpt_print(path, 2866 "number of openings is now %d\n", 2867 crs->openings); 2868 } 2869 } 2870 } 2871 2872 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2873 2874 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2875 2876 /* 2877 * Just extend the old timeout and decrement 2878 * the freeze count so that a single timeout 2879 * is sufficient for releasing the queue. 2880 */ 2881 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2882 callout_stop(&dev->callout); 2883 } else { 2884 2885 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2886 } 2887 2888 callout_reset(&dev->callout, 2889 (crs->release_timeout * hz) / 1000, 2890 xpt_release_devq_timeout, dev); 2891 2892 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2893 2894 } 2895 2896 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2897 2898 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2899 /* 2900 * Decrement the freeze count so that a single 2901 * completion is still sufficient to unfreeze 2902 * the queue. 2903 */ 2904 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2905 } else { 2906 2907 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 2908 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2909 } 2910 } 2911 2912 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 2913 2914 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 2915 || (dev->ccbq.dev_active == 0)) { 2916 2917 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2918 } else { 2919 2920 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 2921 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2922 } 2923 } 2924 2925 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 2926 xpt_release_devq_rl(path, /*runlevel*/ 2927 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2928 crs->release_timeout : 0, 2929 /*count*/1, /*run_queue*/TRUE); 2930 } 2931 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt[0]; 2932 start_ccb->ccb_h.status = CAM_REQ_CMP; 2933 break; 2934 } 2935 case XPT_DEBUG: { 2936 /* Check that all request bits are supported. */ 2937 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 2938 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 2939 break; 2940 } 2941 2942 cam_dflags = start_ccb->cdbg.flags; 2943 if (cam_dpath != NULL) { 2944 xpt_free_path(cam_dpath); 2945 cam_dpath = NULL; 2946 } 2947 if (cam_dflags != CAM_DEBUG_NONE) { 2948 if (xpt_create_path(&cam_dpath, xpt_periph, 2949 start_ccb->ccb_h.path_id, 2950 start_ccb->ccb_h.target_id, 2951 start_ccb->ccb_h.target_lun) != 2952 CAM_REQ_CMP) { 2953 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 2954 cam_dflags = CAM_DEBUG_NONE; 2955 } else { 2956 start_ccb->ccb_h.status = CAM_REQ_CMP; 2957 xpt_print(cam_dpath, "debugging flags now %x\n", 2958 cam_dflags); 2959 } 2960 } else { 2961 cam_dpath = NULL; 2962 start_ccb->ccb_h.status = CAM_REQ_CMP; 2963 } 2964 break; 2965 } 2966 case XPT_FREEZE_QUEUE: 2967 { 2968 struct ccb_relsim *crs = &start_ccb->crs; 2969 2970 xpt_freeze_devq_rl(path, /*runlevel*/ 2971 (crs->release_flags & RELSIM_RELEASE_RUNLEVEL) ? 2972 crs->release_timeout : 0, /*count*/1); 2973 start_ccb->ccb_h.status = CAM_REQ_CMP; 2974 break; 2975 } 2976 case XPT_NOOP: 2977 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 2978 xpt_freeze_devq(path, 1); 2979 start_ccb->ccb_h.status = CAM_REQ_CMP; 2980 break; 2981 default: 2982 case XPT_SDEV_TYPE: 2983 case XPT_TERM_IO: 2984 case XPT_ENG_INQ: 2985 /* XXX Implement */ 2986 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 2987 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 2988 xpt_done(start_ccb); 2989 } 2990 break; 2991 } 2992 } 2993 2994 void 2995 xpt_polled_action(union ccb *start_ccb) 2996 { 2997 u_int32_t timeout; 2998 struct cam_sim *sim; 2999 struct cam_devq *devq; 3000 struct cam_ed *dev; 3001 3002 3003 timeout = start_ccb->ccb_h.timeout * 10; 3004 sim = start_ccb->ccb_h.path->bus->sim; 3005 devq = sim->devq; 3006 dev = start_ccb->ccb_h.path->device; 3007 3008 mtx_assert(sim->mtx, MA_OWNED); 3009 3010 /* Don't use ISR for this SIM while polling. */ 3011 sim->flags |= CAM_SIM_POLLED; 3012 3013 /* 3014 * Steal an opening so that no other queued requests 3015 * can get it before us while we simulate interrupts. 3016 */ 3017 dev->ccbq.devq_openings--; 3018 dev->ccbq.dev_openings--; 3019 3020 while(((devq != NULL && devq->send_openings <= 0) || 3021 dev->ccbq.dev_openings < 0) && (--timeout > 0)) { 3022 DELAY(100); 3023 (*(sim->sim_poll))(sim); 3024 camisr_runqueue(&sim->sim_doneq); 3025 } 3026 3027 dev->ccbq.devq_openings++; 3028 dev->ccbq.dev_openings++; 3029 3030 if (timeout != 0) { 3031 xpt_action(start_ccb); 3032 while(--timeout > 0) { 3033 (*(sim->sim_poll))(sim); 3034 camisr_runqueue(&sim->sim_doneq); 3035 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3036 != CAM_REQ_INPROG) 3037 break; 3038 DELAY(100); 3039 } 3040 if (timeout == 0) { 3041 /* 3042 * XXX Is it worth adding a sim_timeout entry 3043 * point so we can attempt recovery? If 3044 * this is only used for dumps, I don't think 3045 * it is. 3046 */ 3047 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3048 } 3049 } else { 3050 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3051 } 3052 3053 /* We will use CAM ISR for this SIM again. */ 3054 sim->flags &= ~CAM_SIM_POLLED; 3055 } 3056 3057 /* 3058 * Schedule a peripheral driver to receive a ccb when it's 3059 * target device has space for more transactions. 3060 */ 3061 void 3062 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3063 { 3064 struct cam_ed *device; 3065 int runq = 0; 3066 3067 mtx_assert(perph->sim->mtx, MA_OWNED); 3068 3069 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3070 device = perph->path->device; 3071 if (periph_is_queued(perph)) { 3072 /* Simply reorder based on new priority */ 3073 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3074 (" change priority to %d\n", new_priority)); 3075 if (new_priority < perph->pinfo.priority) { 3076 camq_change_priority(&device->drvq, 3077 perph->pinfo.index, 3078 new_priority); 3079 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3080 } 3081 } else { 3082 /* New entry on the queue */ 3083 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3084 (" added periph to queue\n")); 3085 perph->pinfo.priority = new_priority; 3086 perph->pinfo.generation = ++device->drvq.generation; 3087 camq_insert(&device->drvq, &perph->pinfo); 3088 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3089 } 3090 if (runq != 0) { 3091 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3092 (" calling xpt_run_devq\n")); 3093 xpt_run_dev_allocq(perph->path->bus); 3094 } 3095 } 3096 3097 3098 /* 3099 * Schedule a device to run on a given queue. 3100 * If the device was inserted as a new entry on the queue, 3101 * return 1 meaning the device queue should be run. If we 3102 * were already queued, implying someone else has already 3103 * started the queue, return 0 so the caller doesn't attempt 3104 * to run the queue. 3105 */ 3106 int 3107 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3108 u_int32_t new_priority) 3109 { 3110 int retval; 3111 u_int32_t old_priority; 3112 3113 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3114 3115 old_priority = pinfo->priority; 3116 3117 /* 3118 * Are we already queued? 3119 */ 3120 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3121 /* Simply reorder based on new priority */ 3122 if (new_priority < old_priority) { 3123 camq_change_priority(queue, pinfo->index, 3124 new_priority); 3125 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3126 ("changed priority to %d\n", 3127 new_priority)); 3128 retval = 1; 3129 } else 3130 retval = 0; 3131 } else { 3132 /* New entry on the queue */ 3133 if (new_priority < old_priority) 3134 pinfo->priority = new_priority; 3135 3136 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3137 ("Inserting onto queue\n")); 3138 pinfo->generation = ++queue->generation; 3139 camq_insert(queue, pinfo); 3140 retval = 1; 3141 } 3142 return (retval); 3143 } 3144 3145 static void 3146 xpt_run_dev_allocq(struct cam_eb *bus) 3147 { 3148 struct cam_devq *devq; 3149 3150 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3151 devq = bus->sim->devq; 3152 3153 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3154 (" qfrozen_cnt == 0x%x, entries == %d, " 3155 "openings == %d, active == %d\n", 3156 devq->alloc_queue.qfrozen_cnt[0], 3157 devq->alloc_queue.entries, 3158 devq->alloc_openings, 3159 devq->alloc_active)); 3160 3161 devq->alloc_queue.qfrozen_cnt[0]++; 3162 while ((devq->alloc_queue.entries > 0) 3163 && (devq->alloc_openings > 0) 3164 && (devq->alloc_queue.qfrozen_cnt[0] <= 1)) { 3165 struct cam_ed_qinfo *qinfo; 3166 struct cam_ed *device; 3167 union ccb *work_ccb; 3168 struct cam_periph *drv; 3169 struct camq *drvq; 3170 3171 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3172 CAMQ_HEAD); 3173 device = qinfo->device; 3174 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3175 ("running device %p\n", device)); 3176 3177 drvq = &device->drvq; 3178 KASSERT(drvq->entries > 0, ("xpt_run_dev_allocq: " 3179 "Device on queue without any work to do")); 3180 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3181 devq->alloc_openings--; 3182 devq->alloc_active++; 3183 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3184 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3185 drv->pinfo.priority); 3186 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3187 ("calling periph start\n")); 3188 drv->periph_start(drv, work_ccb); 3189 } else { 3190 /* 3191 * Malloc failure in alloc_ccb 3192 */ 3193 /* 3194 * XXX add us to a list to be run from free_ccb 3195 * if we don't have any ccbs active on this 3196 * device queue otherwise we may never get run 3197 * again. 3198 */ 3199 break; 3200 } 3201 3202 /* We may have more work. Attempt to reschedule. */ 3203 xpt_schedule_dev_allocq(bus, device); 3204 } 3205 devq->alloc_queue.qfrozen_cnt[0]--; 3206 } 3207 3208 static void 3209 xpt_run_dev_sendq(struct cam_eb *bus) 3210 { 3211 struct cam_devq *devq; 3212 3213 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3214 3215 devq = bus->sim->devq; 3216 3217 devq->send_queue.qfrozen_cnt[0]++; 3218 while ((devq->send_queue.entries > 0) 3219 && (devq->send_openings > 0) 3220 && (devq->send_queue.qfrozen_cnt[0] <= 1)) { 3221 struct cam_ed_qinfo *qinfo; 3222 struct cam_ed *device; 3223 union ccb *work_ccb; 3224 struct cam_sim *sim; 3225 3226 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3227 CAMQ_HEAD); 3228 device = qinfo->device; 3229 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3230 ("running device %p\n", device)); 3231 3232 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3233 if (work_ccb == NULL) { 3234 printf("device on run queue with no ccbs???\n"); 3235 continue; 3236 } 3237 3238 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3239 3240 mtx_lock(&xsoftc.xpt_lock); 3241 if (xsoftc.num_highpower <= 0) { 3242 /* 3243 * We got a high power command, but we 3244 * don't have any available slots. Freeze 3245 * the device queue until we have a slot 3246 * available. 3247 */ 3248 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3249 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3250 &work_ccb->ccb_h, 3251 xpt_links.stqe); 3252 3253 mtx_unlock(&xsoftc.xpt_lock); 3254 continue; 3255 } else { 3256 /* 3257 * Consume a high power slot while 3258 * this ccb runs. 3259 */ 3260 xsoftc.num_highpower--; 3261 } 3262 mtx_unlock(&xsoftc.xpt_lock); 3263 } 3264 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3265 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3266 3267 devq->send_openings--; 3268 devq->send_active++; 3269 3270 xpt_schedule_dev_sendq(bus, device); 3271 3272 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3273 /* 3274 * The client wants to freeze the queue 3275 * after this CCB is sent. 3276 */ 3277 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3278 } 3279 3280 /* In Target mode, the peripheral driver knows best... */ 3281 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3282 if ((device->inq_flags & SID_CmdQue) != 0 3283 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3284 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3285 else 3286 /* 3287 * Clear this in case of a retried CCB that 3288 * failed due to a rejected tag. 3289 */ 3290 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3291 } 3292 3293 /* 3294 * Device queues can be shared among multiple sim instances 3295 * that reside on different busses. Use the SIM in the queue 3296 * CCB's path, rather than the one in the bus that was passed 3297 * into this function. 3298 */ 3299 sim = work_ccb->ccb_h.path->bus->sim; 3300 (*(sim->sim_action))(sim, work_ccb); 3301 } 3302 devq->send_queue.qfrozen_cnt[0]--; 3303 } 3304 3305 /* 3306 * This function merges stuff from the slave ccb into the master ccb, while 3307 * keeping important fields in the master ccb constant. 3308 */ 3309 void 3310 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3311 { 3312 3313 /* 3314 * Pull fields that are valid for peripheral drivers to set 3315 * into the master CCB along with the CCB "payload". 3316 */ 3317 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3318 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3319 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3320 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3321 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3322 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3323 } 3324 3325 void 3326 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3327 { 3328 3329 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3330 ccb_h->pinfo.priority = priority; 3331 ccb_h->path = path; 3332 ccb_h->path_id = path->bus->path_id; 3333 if (path->target) 3334 ccb_h->target_id = path->target->target_id; 3335 else 3336 ccb_h->target_id = CAM_TARGET_WILDCARD; 3337 if (path->device) { 3338 ccb_h->target_lun = path->device->lun_id; 3339 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3340 } else { 3341 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3342 } 3343 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3344 ccb_h->flags = 0; 3345 } 3346 3347 /* Path manipulation functions */ 3348 cam_status 3349 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3350 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3351 { 3352 struct cam_path *path; 3353 cam_status status; 3354 3355 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3356 3357 if (path == NULL) { 3358 status = CAM_RESRC_UNAVAIL; 3359 return(status); 3360 } 3361 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3362 if (status != CAM_REQ_CMP) { 3363 free(path, M_CAMXPT); 3364 path = NULL; 3365 } 3366 *new_path_ptr = path; 3367 return (status); 3368 } 3369 3370 cam_status 3371 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3372 struct cam_periph *periph, path_id_t path_id, 3373 target_id_t target_id, lun_id_t lun_id) 3374 { 3375 struct cam_path *path; 3376 struct cam_eb *bus = NULL; 3377 cam_status status; 3378 int need_unlock = 0; 3379 3380 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3381 3382 if (path_id != CAM_BUS_WILDCARD) { 3383 bus = xpt_find_bus(path_id); 3384 if (bus != NULL) { 3385 need_unlock = 1; 3386 CAM_SIM_LOCK(bus->sim); 3387 } 3388 } 3389 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3390 if (need_unlock) { 3391 CAM_SIM_UNLOCK(bus->sim); 3392 xpt_release_bus(bus); 3393 } 3394 if (status != CAM_REQ_CMP) { 3395 free(path, M_CAMXPT); 3396 path = NULL; 3397 } 3398 *new_path_ptr = path; 3399 return (status); 3400 } 3401 3402 cam_status 3403 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3404 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3405 { 3406 struct cam_eb *bus; 3407 struct cam_et *target; 3408 struct cam_ed *device; 3409 cam_status status; 3410 3411 status = CAM_REQ_CMP; /* Completed without error */ 3412 target = NULL; /* Wildcarded */ 3413 device = NULL; /* Wildcarded */ 3414 3415 /* 3416 * We will potentially modify the EDT, so block interrupts 3417 * that may attempt to create cam paths. 3418 */ 3419 bus = xpt_find_bus(path_id); 3420 if (bus == NULL) { 3421 status = CAM_PATH_INVALID; 3422 } else { 3423 target = xpt_find_target(bus, target_id); 3424 if (target == NULL) { 3425 /* Create one */ 3426 struct cam_et *new_target; 3427 3428 new_target = xpt_alloc_target(bus, target_id); 3429 if (new_target == NULL) { 3430 status = CAM_RESRC_UNAVAIL; 3431 } else { 3432 target = new_target; 3433 } 3434 } 3435 if (target != NULL) { 3436 device = xpt_find_device(target, lun_id); 3437 if (device == NULL) { 3438 /* Create one */ 3439 struct cam_ed *new_device; 3440 3441 new_device = 3442 (*(bus->xport->alloc_device))(bus, 3443 target, 3444 lun_id); 3445 if (new_device == NULL) { 3446 status = CAM_RESRC_UNAVAIL; 3447 } else { 3448 device = new_device; 3449 } 3450 } 3451 } 3452 } 3453 3454 /* 3455 * Only touch the user's data if we are successful. 3456 */ 3457 if (status == CAM_REQ_CMP) { 3458 new_path->periph = perph; 3459 new_path->bus = bus; 3460 new_path->target = target; 3461 new_path->device = device; 3462 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3463 } else { 3464 if (device != NULL) 3465 xpt_release_device(device); 3466 if (target != NULL) 3467 xpt_release_target(target); 3468 if (bus != NULL) 3469 xpt_release_bus(bus); 3470 } 3471 return (status); 3472 } 3473 3474 void 3475 xpt_release_path(struct cam_path *path) 3476 { 3477 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3478 if (path->device != NULL) { 3479 xpt_release_device(path->device); 3480 path->device = NULL; 3481 } 3482 if (path->target != NULL) { 3483 xpt_release_target(path->target); 3484 path->target = NULL; 3485 } 3486 if (path->bus != NULL) { 3487 xpt_release_bus(path->bus); 3488 path->bus = NULL; 3489 } 3490 } 3491 3492 void 3493 xpt_free_path(struct cam_path *path) 3494 { 3495 3496 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3497 xpt_release_path(path); 3498 free(path, M_CAMXPT); 3499 } 3500 3501 void 3502 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3503 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3504 { 3505 3506 mtx_lock(&xsoftc.xpt_topo_lock); 3507 if (bus_ref) { 3508 if (path->bus) 3509 *bus_ref = path->bus->refcount; 3510 else 3511 *bus_ref = 0; 3512 } 3513 mtx_unlock(&xsoftc.xpt_topo_lock); 3514 if (periph_ref) { 3515 if (path->periph) 3516 *periph_ref = path->periph->refcount; 3517 else 3518 *periph_ref = 0; 3519 } 3520 if (target_ref) { 3521 if (path->target) 3522 *target_ref = path->target->refcount; 3523 else 3524 *target_ref = 0; 3525 } 3526 if (device_ref) { 3527 if (path->device) 3528 *device_ref = path->device->refcount; 3529 else 3530 *device_ref = 0; 3531 } 3532 } 3533 3534 /* 3535 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3536 * in path1, 2 for match with wildcards in path2. 3537 */ 3538 int 3539 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3540 { 3541 int retval = 0; 3542 3543 if (path1->bus != path2->bus) { 3544 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3545 retval = 1; 3546 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3547 retval = 2; 3548 else 3549 return (-1); 3550 } 3551 if (path1->target != path2->target) { 3552 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3553 if (retval == 0) 3554 retval = 1; 3555 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3556 retval = 2; 3557 else 3558 return (-1); 3559 } 3560 if (path1->device != path2->device) { 3561 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3562 if (retval == 0) 3563 retval = 1; 3564 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3565 retval = 2; 3566 else 3567 return (-1); 3568 } 3569 return (retval); 3570 } 3571 3572 void 3573 xpt_print_path(struct cam_path *path) 3574 { 3575 3576 if (path == NULL) 3577 printf("(nopath): "); 3578 else { 3579 if (path->periph != NULL) 3580 printf("(%s%d:", path->periph->periph_name, 3581 path->periph->unit_number); 3582 else 3583 printf("(noperiph:"); 3584 3585 if (path->bus != NULL) 3586 printf("%s%d:%d:", path->bus->sim->sim_name, 3587 path->bus->sim->unit_number, 3588 path->bus->sim->bus_id); 3589 else 3590 printf("nobus:"); 3591 3592 if (path->target != NULL) 3593 printf("%d:", path->target->target_id); 3594 else 3595 printf("X:"); 3596 3597 if (path->device != NULL) 3598 printf("%d): ", path->device->lun_id); 3599 else 3600 printf("X): "); 3601 } 3602 } 3603 3604 void 3605 xpt_print(struct cam_path *path, const char *fmt, ...) 3606 { 3607 va_list ap; 3608 xpt_print_path(path); 3609 va_start(ap, fmt); 3610 vprintf(fmt, ap); 3611 va_end(ap); 3612 } 3613 3614 int 3615 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3616 { 3617 struct sbuf sb; 3618 3619 #ifdef INVARIANTS 3620 if (path != NULL && path->bus != NULL) 3621 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3622 #endif 3623 3624 sbuf_new(&sb, str, str_len, 0); 3625 3626 if (path == NULL) 3627 sbuf_printf(&sb, "(nopath): "); 3628 else { 3629 if (path->periph != NULL) 3630 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 3631 path->periph->unit_number); 3632 else 3633 sbuf_printf(&sb, "(noperiph:"); 3634 3635 if (path->bus != NULL) 3636 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 3637 path->bus->sim->unit_number, 3638 path->bus->sim->bus_id); 3639 else 3640 sbuf_printf(&sb, "nobus:"); 3641 3642 if (path->target != NULL) 3643 sbuf_printf(&sb, "%d:", path->target->target_id); 3644 else 3645 sbuf_printf(&sb, "X:"); 3646 3647 if (path->device != NULL) 3648 sbuf_printf(&sb, "%d): ", path->device->lun_id); 3649 else 3650 sbuf_printf(&sb, "X): "); 3651 } 3652 sbuf_finish(&sb); 3653 3654 return(sbuf_len(&sb)); 3655 } 3656 3657 path_id_t 3658 xpt_path_path_id(struct cam_path *path) 3659 { 3660 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3661 3662 return(path->bus->path_id); 3663 } 3664 3665 target_id_t 3666 xpt_path_target_id(struct cam_path *path) 3667 { 3668 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3669 3670 if (path->target != NULL) 3671 return (path->target->target_id); 3672 else 3673 return (CAM_TARGET_WILDCARD); 3674 } 3675 3676 lun_id_t 3677 xpt_path_lun_id(struct cam_path *path) 3678 { 3679 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3680 3681 if (path->device != NULL) 3682 return (path->device->lun_id); 3683 else 3684 return (CAM_LUN_WILDCARD); 3685 } 3686 3687 struct cam_sim * 3688 xpt_path_sim(struct cam_path *path) 3689 { 3690 3691 return (path->bus->sim); 3692 } 3693 3694 struct cam_periph* 3695 xpt_path_periph(struct cam_path *path) 3696 { 3697 mtx_assert(path->bus->sim->mtx, MA_OWNED); 3698 3699 return (path->periph); 3700 } 3701 3702 int 3703 xpt_path_legacy_ata_id(struct cam_path *path) 3704 { 3705 struct cam_eb *bus; 3706 int bus_id; 3707 3708 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) && 3709 strcmp(path->bus->sim->sim_name, "ahcich") != 0 && 3710 strcmp(path->bus->sim->sim_name, "mvsch") != 0 && 3711 strcmp(path->bus->sim->sim_name, "siisch") != 0) 3712 return (-1); 3713 3714 if (strcmp(path->bus->sim->sim_name, "ata") == 0 && 3715 path->bus->sim->unit_number < 2) { 3716 bus_id = path->bus->sim->unit_number; 3717 } else { 3718 bus_id = 2; 3719 xpt_lock_buses(); 3720 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 3721 if (bus == path->bus) 3722 break; 3723 if ((strcmp(bus->sim->sim_name, "ata") == 0 && 3724 bus->sim->unit_number >= 2) || 3725 strcmp(bus->sim->sim_name, "ahcich") == 0 || 3726 strcmp(bus->sim->sim_name, "mvsch") == 0 || 3727 strcmp(bus->sim->sim_name, "siisch") == 0) 3728 bus_id++; 3729 } 3730 xpt_unlock_buses(); 3731 } 3732 if (path->target != NULL) { 3733 if (path->target->target_id < 2) 3734 return (bus_id * 2 + path->target->target_id); 3735 else 3736 return (-1); 3737 } else 3738 return (bus_id * 2); 3739 } 3740 3741 /* 3742 * Release a CAM control block for the caller. Remit the cost of the structure 3743 * to the device referenced by the path. If the this device had no 'credits' 3744 * and peripheral drivers have registered async callbacks for this notification 3745 * call them now. 3746 */ 3747 void 3748 xpt_release_ccb(union ccb *free_ccb) 3749 { 3750 struct cam_path *path; 3751 struct cam_ed *device; 3752 struct cam_eb *bus; 3753 struct cam_sim *sim; 3754 3755 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3756 path = free_ccb->ccb_h.path; 3757 device = path->device; 3758 bus = path->bus; 3759 sim = bus->sim; 3760 3761 mtx_assert(sim->mtx, MA_OWNED); 3762 3763 cam_ccbq_release_opening(&device->ccbq); 3764 if (device->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) { 3765 device->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 3766 cam_ccbq_resize(&device->ccbq, 3767 device->ccbq.dev_openings + device->ccbq.dev_active); 3768 } 3769 if (sim->ccb_count > sim->max_ccbs) { 3770 xpt_free_ccb(free_ccb); 3771 sim->ccb_count--; 3772 } else { 3773 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 3774 xpt_links.sle); 3775 } 3776 if (sim->devq == NULL) { 3777 return; 3778 } 3779 sim->devq->alloc_openings++; 3780 sim->devq->alloc_active--; 3781 if (device_is_alloc_queued(device) == 0) 3782 xpt_schedule_dev_allocq(bus, device); 3783 xpt_run_dev_allocq(bus); 3784 } 3785 3786 /* Functions accessed by SIM drivers */ 3787 3788 static struct xpt_xport xport_default = { 3789 .alloc_device = xpt_alloc_device_default, 3790 .action = xpt_action_default, 3791 .async = xpt_dev_async_default, 3792 }; 3793 3794 /* 3795 * A sim structure, listing the SIM entry points and instance 3796 * identification info is passed to xpt_bus_register to hook the SIM 3797 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3798 * for this new bus and places it in the array of busses and assigns 3799 * it a path_id. The path_id may be influenced by "hard wiring" 3800 * information specified by the user. Once interrupt services are 3801 * available, the bus will be probed. 3802 */ 3803 int32_t 3804 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3805 { 3806 struct cam_eb *new_bus; 3807 struct cam_eb *old_bus; 3808 struct ccb_pathinq cpi; 3809 struct cam_path *path; 3810 cam_status status; 3811 3812 mtx_assert(sim->mtx, MA_OWNED); 3813 3814 sim->bus_id = bus; 3815 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3816 M_CAMXPT, M_NOWAIT); 3817 if (new_bus == NULL) { 3818 /* Couldn't satisfy request */ 3819 return (CAM_RESRC_UNAVAIL); 3820 } 3821 path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT); 3822 if (path == NULL) { 3823 free(new_bus, M_CAMXPT); 3824 return (CAM_RESRC_UNAVAIL); 3825 } 3826 3827 if (strcmp(sim->sim_name, "xpt") != 0) { 3828 sim->path_id = 3829 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3830 } 3831 3832 TAILQ_INIT(&new_bus->et_entries); 3833 new_bus->path_id = sim->path_id; 3834 cam_sim_hold(sim); 3835 new_bus->sim = sim; 3836 timevalclear(&new_bus->last_reset); 3837 new_bus->flags = 0; 3838 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3839 new_bus->generation = 0; 3840 3841 mtx_lock(&xsoftc.xpt_topo_lock); 3842 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3843 while (old_bus != NULL 3844 && old_bus->path_id < new_bus->path_id) 3845 old_bus = TAILQ_NEXT(old_bus, links); 3846 if (old_bus != NULL) 3847 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3848 else 3849 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3850 xsoftc.bus_generation++; 3851 mtx_unlock(&xsoftc.xpt_topo_lock); 3852 3853 /* 3854 * Set a default transport so that a PATH_INQ can be issued to 3855 * the SIM. This will then allow for probing and attaching of 3856 * a more appropriate transport. 3857 */ 3858 new_bus->xport = &xport_default; 3859 3860 status = xpt_compile_path(path, /*periph*/NULL, sim->path_id, 3861 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3862 if (status != CAM_REQ_CMP) 3863 printf("xpt_compile_path returned %d\n", status); 3864 3865 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3866 cpi.ccb_h.func_code = XPT_PATH_INQ; 3867 xpt_action((union ccb *)&cpi); 3868 3869 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3870 switch (cpi.transport) { 3871 case XPORT_SPI: 3872 case XPORT_SAS: 3873 case XPORT_FC: 3874 case XPORT_USB: 3875 case XPORT_ISCSI: 3876 case XPORT_PPB: 3877 new_bus->xport = scsi_get_xport(); 3878 break; 3879 case XPORT_ATA: 3880 case XPORT_SATA: 3881 new_bus->xport = ata_get_xport(); 3882 break; 3883 default: 3884 new_bus->xport = &xport_default; 3885 break; 3886 } 3887 } 3888 3889 /* Notify interested parties */ 3890 if (sim->path_id != CAM_XPT_PATH_ID) { 3891 union ccb *scan_ccb; 3892 3893 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3894 /* Initiate bus rescan. */ 3895 scan_ccb = xpt_alloc_ccb_nowait(); 3896 scan_ccb->ccb_h.path = path; 3897 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3898 scan_ccb->crcn.flags = 0; 3899 xpt_rescan(scan_ccb); 3900 } else 3901 xpt_free_path(path); 3902 return (CAM_SUCCESS); 3903 } 3904 3905 int32_t 3906 xpt_bus_deregister(path_id_t pathid) 3907 { 3908 struct cam_path bus_path; 3909 cam_status status; 3910 3911 status = xpt_compile_path(&bus_path, NULL, pathid, 3912 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3913 if (status != CAM_REQ_CMP) 3914 return (status); 3915 3916 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 3917 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 3918 3919 /* Release the reference count held while registered. */ 3920 xpt_release_bus(bus_path.bus); 3921 xpt_release_path(&bus_path); 3922 3923 return (CAM_REQ_CMP); 3924 } 3925 3926 static path_id_t 3927 xptnextfreepathid(void) 3928 { 3929 struct cam_eb *bus; 3930 path_id_t pathid; 3931 const char *strval; 3932 3933 pathid = 0; 3934 mtx_lock(&xsoftc.xpt_topo_lock); 3935 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3936 retry: 3937 /* Find an unoccupied pathid */ 3938 while (bus != NULL && bus->path_id <= pathid) { 3939 if (bus->path_id == pathid) 3940 pathid++; 3941 bus = TAILQ_NEXT(bus, links); 3942 } 3943 mtx_unlock(&xsoftc.xpt_topo_lock); 3944 3945 /* 3946 * Ensure that this pathid is not reserved for 3947 * a bus that may be registered in the future. 3948 */ 3949 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 3950 ++pathid; 3951 /* Start the search over */ 3952 mtx_lock(&xsoftc.xpt_topo_lock); 3953 goto retry; 3954 } 3955 return (pathid); 3956 } 3957 3958 static path_id_t 3959 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 3960 { 3961 path_id_t pathid; 3962 int i, dunit, val; 3963 char buf[32]; 3964 const char *dname; 3965 3966 pathid = CAM_XPT_PATH_ID; 3967 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 3968 i = 0; 3969 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 3970 if (strcmp(dname, "scbus")) { 3971 /* Avoid a bit of foot shooting. */ 3972 continue; 3973 } 3974 if (dunit < 0) /* unwired?! */ 3975 continue; 3976 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 3977 if (sim_bus == val) { 3978 pathid = dunit; 3979 break; 3980 } 3981 } else if (sim_bus == 0) { 3982 /* Unspecified matches bus 0 */ 3983 pathid = dunit; 3984 break; 3985 } else { 3986 printf("Ambiguous scbus configuration for %s%d " 3987 "bus %d, cannot wire down. The kernel " 3988 "config entry for scbus%d should " 3989 "specify a controller bus.\n" 3990 "Scbus will be assigned dynamically.\n", 3991 sim_name, sim_unit, sim_bus, dunit); 3992 break; 3993 } 3994 } 3995 3996 if (pathid == CAM_XPT_PATH_ID) 3997 pathid = xptnextfreepathid(); 3998 return (pathid); 3999 } 4000 4001 static const char * 4002 xpt_async_string(u_int32_t async_code) 4003 { 4004 4005 switch (async_code) { 4006 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4007 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4008 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4009 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4010 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4011 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4012 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4013 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4014 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4015 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4016 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4017 case AC_CONTRACT: return ("AC_CONTRACT"); 4018 } 4019 return ("AC_UNKNOWN"); 4020 } 4021 4022 void 4023 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4024 { 4025 struct cam_eb *bus; 4026 struct cam_et *target, *next_target; 4027 struct cam_ed *device, *next_device; 4028 4029 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4030 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4031 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4032 4033 /* 4034 * Most async events come from a CAM interrupt context. In 4035 * a few cases, the error recovery code at the peripheral layer, 4036 * which may run from our SWI or a process context, may signal 4037 * deferred events with a call to xpt_async. 4038 */ 4039 4040 bus = path->bus; 4041 4042 if (async_code == AC_BUS_RESET) { 4043 /* Update our notion of when the last reset occurred */ 4044 microtime(&bus->last_reset); 4045 } 4046 4047 for (target = TAILQ_FIRST(&bus->et_entries); 4048 target != NULL; 4049 target = next_target) { 4050 4051 next_target = TAILQ_NEXT(target, links); 4052 4053 if (path->target != target 4054 && path->target->target_id != CAM_TARGET_WILDCARD 4055 && target->target_id != CAM_TARGET_WILDCARD) 4056 continue; 4057 4058 if (async_code == AC_SENT_BDR) { 4059 /* Update our notion of when the last reset occurred */ 4060 microtime(&path->target->last_reset); 4061 } 4062 4063 for (device = TAILQ_FIRST(&target->ed_entries); 4064 device != NULL; 4065 device = next_device) { 4066 4067 next_device = TAILQ_NEXT(device, links); 4068 4069 if (path->device != device 4070 && path->device->lun_id != CAM_LUN_WILDCARD 4071 && device->lun_id != CAM_LUN_WILDCARD) 4072 continue; 4073 /* 4074 * The async callback could free the device. 4075 * If it is a broadcast async, it doesn't hold 4076 * device reference, so take our own reference. 4077 */ 4078 xpt_acquire_device(device); 4079 (*(bus->xport->async))(async_code, bus, 4080 target, device, 4081 async_arg); 4082 4083 xpt_async_bcast(&device->asyncs, async_code, 4084 path, async_arg); 4085 xpt_release_device(device); 4086 } 4087 } 4088 4089 /* 4090 * If this wasn't a fully wildcarded async, tell all 4091 * clients that want all async events. 4092 */ 4093 if (bus != xpt_periph->path->bus) 4094 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4095 path, async_arg); 4096 } 4097 4098 static void 4099 xpt_async_bcast(struct async_list *async_head, 4100 u_int32_t async_code, 4101 struct cam_path *path, void *async_arg) 4102 { 4103 struct async_node *cur_entry; 4104 4105 cur_entry = SLIST_FIRST(async_head); 4106 while (cur_entry != NULL) { 4107 struct async_node *next_entry; 4108 /* 4109 * Grab the next list entry before we call the current 4110 * entry's callback. This is because the callback function 4111 * can delete its async callback entry. 4112 */ 4113 next_entry = SLIST_NEXT(cur_entry, links); 4114 if ((cur_entry->event_enable & async_code) != 0) 4115 cur_entry->callback(cur_entry->callback_arg, 4116 async_code, path, 4117 async_arg); 4118 cur_entry = next_entry; 4119 } 4120 } 4121 4122 static void 4123 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4124 struct cam_et *target, struct cam_ed *device, 4125 void *async_arg) 4126 { 4127 printf("%s called\n", __func__); 4128 } 4129 4130 u_int32_t 4131 xpt_freeze_devq_rl(struct cam_path *path, cam_rl rl, u_int count) 4132 { 4133 struct cam_ed *dev = path->device; 4134 4135 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4136 dev->sim->devq->alloc_openings += 4137 cam_ccbq_freeze(&dev->ccbq, rl, count); 4138 /* Remove frozen device from allocq. */ 4139 if (device_is_alloc_queued(dev) && 4140 cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 4141 CAMQ_GET_PRIO(&dev->drvq)))) { 4142 camq_remove(&dev->sim->devq->alloc_queue, 4143 dev->alloc_ccb_entry.pinfo.index); 4144 } 4145 /* Remove frozen device from sendq. */ 4146 if (device_is_send_queued(dev) && 4147 cam_ccbq_frozen_top(&dev->ccbq)) { 4148 camq_remove(&dev->sim->devq->send_queue, 4149 dev->send_ccb_entry.pinfo.index); 4150 } 4151 return (dev->ccbq.queue.qfrozen_cnt[rl]); 4152 } 4153 4154 u_int32_t 4155 xpt_freeze_devq(struct cam_path *path, u_int count) 4156 { 4157 4158 return (xpt_freeze_devq_rl(path, 0, count)); 4159 } 4160 4161 u_int32_t 4162 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4163 { 4164 4165 mtx_assert(sim->mtx, MA_OWNED); 4166 sim->devq->send_queue.qfrozen_cnt[0] += count; 4167 return (sim->devq->send_queue.qfrozen_cnt[0]); 4168 } 4169 4170 static void 4171 xpt_release_devq_timeout(void *arg) 4172 { 4173 struct cam_ed *device; 4174 4175 device = (struct cam_ed *)arg; 4176 4177 xpt_release_devq_device(device, /*rl*/0, /*count*/1, /*run_queue*/TRUE); 4178 } 4179 4180 void 4181 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4182 { 4183 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4184 4185 xpt_release_devq_device(path->device, /*rl*/0, count, run_queue); 4186 } 4187 4188 void 4189 xpt_release_devq_rl(struct cam_path *path, cam_rl rl, u_int count, int run_queue) 4190 { 4191 mtx_assert(path->bus->sim->mtx, MA_OWNED); 4192 4193 xpt_release_devq_device(path->device, rl, count, run_queue); 4194 } 4195 4196 static void 4197 xpt_release_devq_device(struct cam_ed *dev, cam_rl rl, u_int count, int run_queue) 4198 { 4199 4200 if (count > dev->ccbq.queue.qfrozen_cnt[rl]) { 4201 #ifdef INVARIANTS 4202 printf("xpt_release_devq(%d): requested %u > present %u\n", 4203 rl, count, dev->ccbq.queue.qfrozen_cnt[rl]); 4204 #endif 4205 count = dev->ccbq.queue.qfrozen_cnt[rl]; 4206 } 4207 dev->sim->devq->alloc_openings -= 4208 cam_ccbq_release(&dev->ccbq, rl, count); 4209 if (cam_ccbq_frozen(&dev->ccbq, CAM_PRIORITY_TO_RL( 4210 CAMQ_GET_PRIO(&dev->drvq))) == 0) { 4211 if (xpt_schedule_dev_allocq(dev->target->bus, dev)) 4212 xpt_run_dev_allocq(dev->target->bus); 4213 } 4214 if (cam_ccbq_frozen_top(&dev->ccbq) == 0) { 4215 /* 4216 * No longer need to wait for a successful 4217 * command completion. 4218 */ 4219 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4220 /* 4221 * Remove any timeouts that might be scheduled 4222 * to release this queue. 4223 */ 4224 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4225 callout_stop(&dev->callout); 4226 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4227 } 4228 if (run_queue == 0) 4229 return; 4230 /* 4231 * Now that we are unfrozen schedule the 4232 * device so any pending transactions are 4233 * run. 4234 */ 4235 if (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4236 xpt_run_dev_sendq(dev->target->bus); 4237 } 4238 } 4239 4240 void 4241 xpt_release_simq(struct cam_sim *sim, int run_queue) 4242 { 4243 struct camq *sendq; 4244 4245 mtx_assert(sim->mtx, MA_OWNED); 4246 sendq = &(sim->devq->send_queue); 4247 if (sendq->qfrozen_cnt[0] <= 0) { 4248 #ifdef INVARIANTS 4249 printf("xpt_release_simq: requested 1 > present %u\n", 4250 sendq->qfrozen_cnt[0]); 4251 #endif 4252 } else 4253 sendq->qfrozen_cnt[0]--; 4254 if (sendq->qfrozen_cnt[0] == 0) { 4255 /* 4256 * If there is a timeout scheduled to release this 4257 * sim queue, remove it. The queue frozen count is 4258 * already at 0. 4259 */ 4260 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4261 callout_stop(&sim->callout); 4262 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4263 } 4264 if (run_queue) { 4265 struct cam_eb *bus; 4266 4267 /* 4268 * Now that we are unfrozen run the send queue. 4269 */ 4270 bus = xpt_find_bus(sim->path_id); 4271 xpt_run_dev_sendq(bus); 4272 xpt_release_bus(bus); 4273 } 4274 } 4275 } 4276 4277 /* 4278 * XXX Appears to be unused. 4279 */ 4280 static void 4281 xpt_release_simq_timeout(void *arg) 4282 { 4283 struct cam_sim *sim; 4284 4285 sim = (struct cam_sim *)arg; 4286 xpt_release_simq(sim, /* run_queue */ TRUE); 4287 } 4288 4289 void 4290 xpt_done(union ccb *done_ccb) 4291 { 4292 struct cam_sim *sim; 4293 int first; 4294 4295 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4296 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4297 /* 4298 * Queue up the request for handling by our SWI handler 4299 * any of the "non-immediate" type of ccbs. 4300 */ 4301 sim = done_ccb->ccb_h.path->bus->sim; 4302 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4303 sim_links.tqe); 4304 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4305 if ((sim->flags & (CAM_SIM_ON_DONEQ | CAM_SIM_POLLED | 4306 CAM_SIM_BATCH)) == 0) { 4307 mtx_lock(&cam_simq_lock); 4308 first = TAILQ_EMPTY(&cam_simq); 4309 TAILQ_INSERT_TAIL(&cam_simq, sim, links); 4310 mtx_unlock(&cam_simq_lock); 4311 sim->flags |= CAM_SIM_ON_DONEQ; 4312 if (first) 4313 swi_sched(cambio_ih, 0); 4314 } 4315 } 4316 } 4317 4318 void 4319 xpt_batch_start(struct cam_sim *sim) 4320 { 4321 4322 KASSERT((sim->flags & CAM_SIM_BATCH) == 0, ("Batch flag already set")); 4323 sim->flags |= CAM_SIM_BATCH; 4324 } 4325 4326 void 4327 xpt_batch_done(struct cam_sim *sim) 4328 { 4329 4330 KASSERT((sim->flags & CAM_SIM_BATCH) != 0, ("Batch flag was not set")); 4331 sim->flags &= ~CAM_SIM_BATCH; 4332 if (!TAILQ_EMPTY(&sim->sim_doneq) && 4333 (sim->flags & CAM_SIM_ON_DONEQ) == 0) 4334 camisr_runqueue(&sim->sim_doneq); 4335 } 4336 4337 union ccb * 4338 xpt_alloc_ccb() 4339 { 4340 union ccb *new_ccb; 4341 4342 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK); 4343 return (new_ccb); 4344 } 4345 4346 union ccb * 4347 xpt_alloc_ccb_nowait() 4348 { 4349 union ccb *new_ccb; 4350 4351 new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT); 4352 return (new_ccb); 4353 } 4354 4355 void 4356 xpt_free_ccb(union ccb *free_ccb) 4357 { 4358 free(free_ccb, M_CAMXPT); 4359 } 4360 4361 4362 4363 /* Private XPT functions */ 4364 4365 /* 4366 * Get a CAM control block for the caller. Charge the structure to the device 4367 * referenced by the path. If the this device has no 'credits' then the 4368 * device already has the maximum number of outstanding operations under way 4369 * and we return NULL. If we don't have sufficient resources to allocate more 4370 * ccbs, we also return NULL. 4371 */ 4372 static union ccb * 4373 xpt_get_ccb(struct cam_ed *device) 4374 { 4375 union ccb *new_ccb; 4376 struct cam_sim *sim; 4377 4378 sim = device->sim; 4379 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4380 new_ccb = xpt_alloc_ccb_nowait(); 4381 if (new_ccb == NULL) { 4382 return (NULL); 4383 } 4384 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4385 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4386 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4387 xpt_links.sle); 4388 sim->ccb_count++; 4389 } 4390 cam_ccbq_take_opening(&device->ccbq); 4391 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4392 return (new_ccb); 4393 } 4394 4395 static void 4396 xpt_release_bus(struct cam_eb *bus) 4397 { 4398 4399 mtx_lock(&xsoftc.xpt_topo_lock); 4400 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4401 if ((--bus->refcount == 0) 4402 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4403 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4404 xsoftc.bus_generation++; 4405 mtx_unlock(&xsoftc.xpt_topo_lock); 4406 cam_sim_release(bus->sim); 4407 free(bus, M_CAMXPT); 4408 } else 4409 mtx_unlock(&xsoftc.xpt_topo_lock); 4410 } 4411 4412 static struct cam_et * 4413 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4414 { 4415 struct cam_et *target; 4416 4417 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT); 4418 if (target != NULL) { 4419 struct cam_et *cur_target; 4420 4421 TAILQ_INIT(&target->ed_entries); 4422 target->bus = bus; 4423 target->target_id = target_id; 4424 target->refcount = 1; 4425 target->generation = 0; 4426 target->luns = NULL; 4427 timevalclear(&target->last_reset); 4428 /* 4429 * Hold a reference to our parent bus so it 4430 * will not go away before we do. 4431 */ 4432 mtx_lock(&xsoftc.xpt_topo_lock); 4433 bus->refcount++; 4434 mtx_unlock(&xsoftc.xpt_topo_lock); 4435 4436 /* Insertion sort into our bus's target list */ 4437 cur_target = TAILQ_FIRST(&bus->et_entries); 4438 while (cur_target != NULL && cur_target->target_id < target_id) 4439 cur_target = TAILQ_NEXT(cur_target, links); 4440 4441 if (cur_target != NULL) { 4442 TAILQ_INSERT_BEFORE(cur_target, target, links); 4443 } else { 4444 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4445 } 4446 bus->generation++; 4447 } 4448 return (target); 4449 } 4450 4451 static void 4452 xpt_release_target(struct cam_et *target) 4453 { 4454 4455 if (target->refcount == 1) { 4456 if (TAILQ_FIRST(&target->ed_entries) == NULL) { 4457 TAILQ_REMOVE(&target->bus->et_entries, target, links); 4458 target->bus->generation++; 4459 xpt_release_bus(target->bus); 4460 if (target->luns) 4461 free(target->luns, M_CAMXPT); 4462 free(target, M_CAMXPT); 4463 } 4464 } else 4465 target->refcount--; 4466 } 4467 4468 static struct cam_ed * 4469 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4470 lun_id_t lun_id) 4471 { 4472 struct cam_ed *device, *cur_device; 4473 4474 device = xpt_alloc_device(bus, target, lun_id); 4475 if (device == NULL) 4476 return (NULL); 4477 4478 device->mintags = 1; 4479 device->maxtags = 1; 4480 bus->sim->max_ccbs += device->ccbq.devq_openings; 4481 cur_device = TAILQ_FIRST(&target->ed_entries); 4482 while (cur_device != NULL && cur_device->lun_id < lun_id) 4483 cur_device = TAILQ_NEXT(cur_device, links); 4484 if (cur_device != NULL) { 4485 TAILQ_INSERT_BEFORE(cur_device, device, links); 4486 } else { 4487 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4488 } 4489 target->generation++; 4490 4491 return (device); 4492 } 4493 4494 struct cam_ed * 4495 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4496 { 4497 struct cam_ed *device; 4498 struct cam_devq *devq; 4499 cam_status status; 4500 4501 /* Make space for us in the device queue on our bus */ 4502 devq = bus->sim->devq; 4503 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4504 4505 if (status != CAM_REQ_CMP) { 4506 device = NULL; 4507 } else { 4508 device = (struct cam_ed *)malloc(sizeof(*device), 4509 M_CAMXPT, M_NOWAIT|M_ZERO); 4510 } 4511 4512 if (device != NULL) { 4513 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4514 device->alloc_ccb_entry.device = device; 4515 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4516 device->send_ccb_entry.device = device; 4517 device->target = target; 4518 device->lun_id = lun_id; 4519 device->sim = bus->sim; 4520 /* Initialize our queues */ 4521 if (camq_init(&device->drvq, 0) != 0) { 4522 free(device, M_CAMXPT); 4523 return (NULL); 4524 } 4525 if (cam_ccbq_init(&device->ccbq, 4526 bus->sim->max_dev_openings) != 0) { 4527 camq_fini(&device->drvq); 4528 free(device, M_CAMXPT); 4529 return (NULL); 4530 } 4531 SLIST_INIT(&device->asyncs); 4532 SLIST_INIT(&device->periphs); 4533 device->generation = 0; 4534 device->owner = NULL; 4535 device->flags = CAM_DEV_UNCONFIGURED; 4536 device->tag_delay_count = 0; 4537 device->tag_saved_openings = 0; 4538 device->refcount = 1; 4539 callout_init_mtx(&device->callout, bus->sim->mtx, 0); 4540 4541 /* 4542 * Hold a reference to our parent target so it 4543 * will not go away before we do. 4544 */ 4545 target->refcount++; 4546 4547 } 4548 return (device); 4549 } 4550 4551 void 4552 xpt_acquire_device(struct cam_ed *device) 4553 { 4554 4555 device->refcount++; 4556 } 4557 4558 void 4559 xpt_release_device(struct cam_ed *device) 4560 { 4561 4562 if (device->refcount == 1) { 4563 struct cam_devq *devq; 4564 4565 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4566 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4567 panic("Removing device while still queued for ccbs"); 4568 4569 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4570 callout_stop(&device->callout); 4571 4572 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4573 device->target->generation++; 4574 device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings; 4575 /* Release our slot in the devq */ 4576 devq = device->target->bus->sim->devq; 4577 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4578 camq_fini(&device->drvq); 4579 cam_ccbq_fini(&device->ccbq); 4580 /* 4581 * Free allocated memory. free(9) does nothing if the 4582 * supplied pointer is NULL, so it is safe to call without 4583 * checking. 4584 */ 4585 free(device->supported_vpds, M_CAMXPT); 4586 free(device->serial_num, M_CAMXPT); 4587 4588 xpt_release_target(device->target); 4589 free(device, M_CAMXPT); 4590 } else 4591 device->refcount--; 4592 } 4593 4594 u_int32_t 4595 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4596 { 4597 int diff; 4598 int result; 4599 struct cam_ed *dev; 4600 4601 dev = path->device; 4602 4603 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4604 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4605 if (result == CAM_REQ_CMP && (diff < 0)) { 4606 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4607 } 4608 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4609 || (dev->inq_flags & SID_CmdQue) != 0) 4610 dev->tag_saved_openings = newopenings; 4611 /* Adjust the global limit */ 4612 dev->sim->max_ccbs += diff; 4613 return (result); 4614 } 4615 4616 static struct cam_eb * 4617 xpt_find_bus(path_id_t path_id) 4618 { 4619 struct cam_eb *bus; 4620 4621 mtx_lock(&xsoftc.xpt_topo_lock); 4622 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4623 bus != NULL; 4624 bus = TAILQ_NEXT(bus, links)) { 4625 if (bus->path_id == path_id) { 4626 bus->refcount++; 4627 break; 4628 } 4629 } 4630 mtx_unlock(&xsoftc.xpt_topo_lock); 4631 return (bus); 4632 } 4633 4634 static struct cam_et * 4635 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4636 { 4637 struct cam_et *target; 4638 4639 for (target = TAILQ_FIRST(&bus->et_entries); 4640 target != NULL; 4641 target = TAILQ_NEXT(target, links)) { 4642 if (target->target_id == target_id) { 4643 target->refcount++; 4644 break; 4645 } 4646 } 4647 return (target); 4648 } 4649 4650 static struct cam_ed * 4651 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4652 { 4653 struct cam_ed *device; 4654 4655 for (device = TAILQ_FIRST(&target->ed_entries); 4656 device != NULL; 4657 device = TAILQ_NEXT(device, links)) { 4658 if (device->lun_id == lun_id) { 4659 device->refcount++; 4660 break; 4661 } 4662 } 4663 return (device); 4664 } 4665 4666 void 4667 xpt_start_tags(struct cam_path *path) 4668 { 4669 struct ccb_relsim crs; 4670 struct cam_ed *device; 4671 struct cam_sim *sim; 4672 int newopenings; 4673 4674 device = path->device; 4675 sim = path->bus->sim; 4676 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4677 xpt_freeze_devq(path, /*count*/1); 4678 device->inq_flags |= SID_CmdQue; 4679 if (device->tag_saved_openings != 0) 4680 newopenings = device->tag_saved_openings; 4681 else 4682 newopenings = min(device->maxtags, 4683 sim->max_tagged_dev_openings); 4684 xpt_dev_ccbq_resize(path, newopenings); 4685 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4686 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4687 crs.ccb_h.func_code = XPT_REL_SIMQ; 4688 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4689 crs.openings 4690 = crs.release_timeout 4691 = crs.qfrozen_cnt 4692 = 0; 4693 xpt_action((union ccb *)&crs); 4694 } 4695 4696 void 4697 xpt_stop_tags(struct cam_path *path) 4698 { 4699 struct ccb_relsim crs; 4700 struct cam_ed *device; 4701 struct cam_sim *sim; 4702 4703 device = path->device; 4704 sim = path->bus->sim; 4705 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4706 device->tag_delay_count = 0; 4707 xpt_freeze_devq(path, /*count*/1); 4708 device->inq_flags &= ~SID_CmdQue; 4709 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4710 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4711 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4712 crs.ccb_h.func_code = XPT_REL_SIMQ; 4713 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4714 crs.openings 4715 = crs.release_timeout 4716 = crs.qfrozen_cnt 4717 = 0; 4718 xpt_action((union ccb *)&crs); 4719 } 4720 4721 static void 4722 xpt_boot_delay(void *arg) 4723 { 4724 4725 xpt_release_boot(); 4726 } 4727 4728 static void 4729 xpt_config(void *arg) 4730 { 4731 /* 4732 * Now that interrupts are enabled, go find our devices 4733 */ 4734 4735 /* Setup debugging path */ 4736 if (cam_dflags != CAM_DEBUG_NONE) { 4737 /* 4738 * Locking is specifically omitted here. No SIMs have 4739 * registered yet, so xpt_create_path will only be searching 4740 * empty lists of targets and devices. 4741 */ 4742 if (xpt_create_path(&cam_dpath, xpt_periph, 4743 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 4744 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 4745 printf("xpt_config: xpt_create_path() failed for debug" 4746 " target %d:%d:%d, debugging disabled\n", 4747 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 4748 cam_dflags = CAM_DEBUG_NONE; 4749 } 4750 } else 4751 cam_dpath = NULL; 4752 4753 periphdriver_init(1); 4754 xpt_hold_boot(); 4755 callout_init(&xsoftc.boot_callout, 1); 4756 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000, 4757 xpt_boot_delay, NULL); 4758 /* Fire up rescan thread. */ 4759 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) { 4760 printf("xpt_init: failed to create rescan thread\n"); 4761 } 4762 } 4763 4764 void 4765 xpt_hold_boot(void) 4766 { 4767 xpt_lock_buses(); 4768 xsoftc.buses_to_config++; 4769 xpt_unlock_buses(); 4770 } 4771 4772 void 4773 xpt_release_boot(void) 4774 { 4775 xpt_lock_buses(); 4776 xsoftc.buses_to_config--; 4777 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 4778 struct xpt_task *task; 4779 4780 xsoftc.buses_config_done = 1; 4781 xpt_unlock_buses(); 4782 /* Call manually because we don't have any busses */ 4783 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 4784 if (task != NULL) { 4785 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 4786 taskqueue_enqueue(taskqueue_thread, &task->task); 4787 } 4788 } else 4789 xpt_unlock_buses(); 4790 } 4791 4792 /* 4793 * If the given device only has one peripheral attached to it, and if that 4794 * peripheral is the passthrough driver, announce it. This insures that the 4795 * user sees some sort of announcement for every peripheral in their system. 4796 */ 4797 static int 4798 xptpassannouncefunc(struct cam_ed *device, void *arg) 4799 { 4800 struct cam_periph *periph; 4801 int i; 4802 4803 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 4804 periph = SLIST_NEXT(periph, periph_links), i++); 4805 4806 periph = SLIST_FIRST(&device->periphs); 4807 if ((i == 1) 4808 && (strncmp(periph->periph_name, "pass", 4) == 0)) 4809 xpt_announce_periph(periph, NULL); 4810 4811 return(1); 4812 } 4813 4814 static void 4815 xpt_finishconfig_task(void *context, int pending) 4816 { 4817 4818 periphdriver_init(2); 4819 /* 4820 * Check for devices with no "standard" peripheral driver 4821 * attached. For any devices like that, announce the 4822 * passthrough driver so the user will see something. 4823 */ 4824 xpt_for_all_devices(xptpassannouncefunc, NULL); 4825 4826 /* Release our hook so that the boot can continue. */ 4827 config_intrhook_disestablish(xsoftc.xpt_config_hook); 4828 free(xsoftc.xpt_config_hook, M_CAMXPT); 4829 xsoftc.xpt_config_hook = NULL; 4830 4831 free(context, M_CAMXPT); 4832 } 4833 4834 cam_status 4835 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 4836 struct cam_path *path) 4837 { 4838 struct ccb_setasync csa; 4839 cam_status status; 4840 int xptpath = 0; 4841 4842 if (path == NULL) { 4843 mtx_lock(&xsoftc.xpt_lock); 4844 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 4845 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4846 if (status != CAM_REQ_CMP) { 4847 mtx_unlock(&xsoftc.xpt_lock); 4848 return (status); 4849 } 4850 xptpath = 1; 4851 } 4852 4853 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 4854 csa.ccb_h.func_code = XPT_SASYNC_CB; 4855 csa.event_enable = event; 4856 csa.callback = cbfunc; 4857 csa.callback_arg = cbarg; 4858 xpt_action((union ccb *)&csa); 4859 status = csa.ccb_h.status; 4860 if (xptpath) { 4861 xpt_free_path(path); 4862 mtx_unlock(&xsoftc.xpt_lock); 4863 4864 if ((status == CAM_REQ_CMP) && 4865 (csa.event_enable & AC_FOUND_DEVICE)) { 4866 /* 4867 * Get this peripheral up to date with all 4868 * the currently existing devices. 4869 */ 4870 xpt_for_all_devices(xptsetasyncfunc, &csa); 4871 } 4872 if ((status == CAM_REQ_CMP) && 4873 (csa.event_enable & AC_PATH_REGISTERED)) { 4874 /* 4875 * Get this peripheral up to date with all 4876 * the currently existing busses. 4877 */ 4878 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 4879 } 4880 } 4881 return (status); 4882 } 4883 4884 static void 4885 xptaction(struct cam_sim *sim, union ccb *work_ccb) 4886 { 4887 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 4888 4889 switch (work_ccb->ccb_h.func_code) { 4890 /* Common cases first */ 4891 case XPT_PATH_INQ: /* Path routing inquiry */ 4892 { 4893 struct ccb_pathinq *cpi; 4894 4895 cpi = &work_ccb->cpi; 4896 cpi->version_num = 1; /* XXX??? */ 4897 cpi->hba_inquiry = 0; 4898 cpi->target_sprt = 0; 4899 cpi->hba_misc = 0; 4900 cpi->hba_eng_cnt = 0; 4901 cpi->max_target = 0; 4902 cpi->max_lun = 0; 4903 cpi->initiator_id = 0; 4904 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 4905 strncpy(cpi->hba_vid, "", HBA_IDLEN); 4906 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 4907 cpi->unit_number = sim->unit_number; 4908 cpi->bus_id = sim->bus_id; 4909 cpi->base_transfer_speed = 0; 4910 cpi->protocol = PROTO_UNSPECIFIED; 4911 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 4912 cpi->transport = XPORT_UNSPECIFIED; 4913 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 4914 cpi->ccb_h.status = CAM_REQ_CMP; 4915 xpt_done(work_ccb); 4916 break; 4917 } 4918 default: 4919 work_ccb->ccb_h.status = CAM_REQ_INVALID; 4920 xpt_done(work_ccb); 4921 break; 4922 } 4923 } 4924 4925 /* 4926 * The xpt as a "controller" has no interrupt sources, so polling 4927 * is a no-op. 4928 */ 4929 static void 4930 xptpoll(struct cam_sim *sim) 4931 { 4932 } 4933 4934 void 4935 xpt_lock_buses(void) 4936 { 4937 mtx_lock(&xsoftc.xpt_topo_lock); 4938 } 4939 4940 void 4941 xpt_unlock_buses(void) 4942 { 4943 mtx_unlock(&xsoftc.xpt_topo_lock); 4944 } 4945 4946 static void 4947 camisr(void *dummy) 4948 { 4949 cam_simq_t queue; 4950 struct cam_sim *sim; 4951 4952 mtx_lock(&cam_simq_lock); 4953 TAILQ_INIT(&queue); 4954 while (!TAILQ_EMPTY(&cam_simq)) { 4955 TAILQ_CONCAT(&queue, &cam_simq, links); 4956 mtx_unlock(&cam_simq_lock); 4957 4958 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 4959 TAILQ_REMOVE(&queue, sim, links); 4960 CAM_SIM_LOCK(sim); 4961 camisr_runqueue(&sim->sim_doneq); 4962 sim->flags &= ~CAM_SIM_ON_DONEQ; 4963 CAM_SIM_UNLOCK(sim); 4964 } 4965 mtx_lock(&cam_simq_lock); 4966 } 4967 mtx_unlock(&cam_simq_lock); 4968 } 4969 4970 static void 4971 camisr_runqueue(void *V_queue) 4972 { 4973 cam_isrq_t *queue = V_queue; 4974 struct ccb_hdr *ccb_h; 4975 4976 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 4977 int runq; 4978 4979 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 4980 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 4981 4982 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 4983 ("camisr\n")); 4984 4985 runq = FALSE; 4986 4987 if (ccb_h->flags & CAM_HIGH_POWER) { 4988 struct highpowerlist *hphead; 4989 union ccb *send_ccb; 4990 4991 mtx_lock(&xsoftc.xpt_lock); 4992 hphead = &xsoftc.highpowerq; 4993 4994 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 4995 4996 /* 4997 * Increment the count since this command is done. 4998 */ 4999 xsoftc.num_highpower++; 5000 5001 /* 5002 * Any high powered commands queued up? 5003 */ 5004 if (send_ccb != NULL) { 5005 5006 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 5007 mtx_unlock(&xsoftc.xpt_lock); 5008 5009 xpt_release_devq(send_ccb->ccb_h.path, 5010 /*count*/1, /*runqueue*/TRUE); 5011 } else 5012 mtx_unlock(&xsoftc.xpt_lock); 5013 } 5014 5015 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5016 struct cam_ed *dev; 5017 5018 dev = ccb_h->path->device; 5019 5020 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5021 ccb_h->path->bus->sim->devq->send_active--; 5022 ccb_h->path->bus->sim->devq->send_openings++; 5023 runq = TRUE; 5024 5025 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5026 && (dev->ccbq.dev_active == 0))) { 5027 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5028 xpt_release_devq(ccb_h->path, /*count*/1, 5029 /*run_queue*/FALSE); 5030 } 5031 5032 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5033 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5034 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5035 xpt_release_devq(ccb_h->path, /*count*/1, 5036 /*run_queue*/FALSE); 5037 } 5038 5039 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5040 && (--dev->tag_delay_count == 0)) 5041 xpt_start_tags(ccb_h->path); 5042 if (!device_is_send_queued(dev)) 5043 xpt_schedule_dev_sendq(ccb_h->path->bus, dev); 5044 } 5045 5046 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5047 xpt_release_simq(ccb_h->path->bus->sim, 5048 /*run_queue*/TRUE); 5049 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5050 runq = FALSE; 5051 } 5052 5053 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5054 && (ccb_h->status & CAM_DEV_QFRZN)) { 5055 xpt_release_devq(ccb_h->path, /*count*/1, 5056 /*run_queue*/TRUE); 5057 ccb_h->status &= ~CAM_DEV_QFRZN; 5058 } else if (runq) { 5059 xpt_run_dev_sendq(ccb_h->path->bus); 5060 } 5061 5062 /* Call the peripheral driver's callback */ 5063 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5064 } 5065 }
Cache object: 9ab33605461fb601be9f8f026e02a3a7
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