1 /*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5 * 6 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 7 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions, and the following disclaimer, 15 * without modification, immediately at the beginning of the file. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include "opt_printf.h" 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/bio.h> 39 #include <sys/bus.h> 40 #include <sys/systm.h> 41 #include <sys/types.h> 42 #include <sys/malloc.h> 43 #include <sys/kernel.h> 44 #include <sys/time.h> 45 #include <sys/conf.h> 46 #include <sys/fcntl.h> 47 #include <sys/interrupt.h> 48 #include <sys/proc.h> 49 #include <sys/sbuf.h> 50 #include <sys/smp.h> 51 #include <sys/taskqueue.h> 52 53 #include <sys/lock.h> 54 #include <sys/mutex.h> 55 #include <sys/sysctl.h> 56 #include <sys/kthread.h> 57 58 #include <cam/cam.h> 59 #include <cam/cam_ccb.h> 60 #include <cam/cam_iosched.h> 61 #include <cam/cam_periph.h> 62 #include <cam/cam_queue.h> 63 #include <cam/cam_sim.h> 64 #include <cam/cam_xpt.h> 65 #include <cam/cam_xpt_sim.h> 66 #include <cam/cam_xpt_periph.h> 67 #include <cam/cam_xpt_internal.h> 68 #include <cam/cam_debug.h> 69 #include <cam/cam_compat.h> 70 71 #include <cam/scsi/scsi_all.h> 72 #include <cam/scsi/scsi_message.h> 73 #include <cam/scsi/scsi_pass.h> 74 75 #include <machine/md_var.h> /* geometry translation */ 76 #include <machine/stdarg.h> /* for xpt_print below */ 77 78 #include "opt_cam.h" 79 80 /* Wild guess based on not wanting to grow the stack too much */ 81 #define XPT_PRINT_MAXLEN 512 82 #ifdef PRINTF_BUFR_SIZE 83 #define XPT_PRINT_LEN PRINTF_BUFR_SIZE 84 #else 85 #define XPT_PRINT_LEN 128 86 #endif 87 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large"); 88 89 /* 90 * This is the maximum number of high powered commands (e.g. start unit) 91 * that can be outstanding at a particular time. 92 */ 93 #ifndef CAM_MAX_HIGHPOWER 94 #define CAM_MAX_HIGHPOWER 4 95 #endif 96 97 /* Datastructures internal to the xpt layer */ 98 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 99 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 100 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 101 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 102 103 /* Object for defering XPT actions to a taskqueue */ 104 struct xpt_task { 105 struct task task; 106 void *data1; 107 uintptr_t data2; 108 }; 109 110 struct xpt_softc { 111 uint32_t xpt_generation; 112 113 /* number of high powered commands that can go through right now */ 114 struct mtx xpt_highpower_lock; 115 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 116 int num_highpower; 117 118 /* queue for handling async rescan requests. */ 119 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 120 int buses_to_config; 121 int buses_config_done; 122 int announce_nosbuf; 123 124 /* 125 * Registered buses 126 * 127 * N.B., "busses" is an archaic spelling of "buses". In new code 128 * "buses" is preferred. 129 */ 130 TAILQ_HEAD(,cam_eb) xpt_busses; 131 u_int bus_generation; 132 133 struct intr_config_hook *xpt_config_hook; 134 135 int boot_delay; 136 struct callout boot_callout; 137 138 struct mtx xpt_topo_lock; 139 struct mtx xpt_lock; 140 struct taskqueue *xpt_taskq; 141 }; 142 143 typedef enum { 144 DM_RET_COPY = 0x01, 145 DM_RET_FLAG_MASK = 0x0f, 146 DM_RET_NONE = 0x00, 147 DM_RET_STOP = 0x10, 148 DM_RET_DESCEND = 0x20, 149 DM_RET_ERROR = 0x30, 150 DM_RET_ACTION_MASK = 0xf0 151 } dev_match_ret; 152 153 typedef enum { 154 XPT_DEPTH_BUS, 155 XPT_DEPTH_TARGET, 156 XPT_DEPTH_DEVICE, 157 XPT_DEPTH_PERIPH 158 } xpt_traverse_depth; 159 160 struct xpt_traverse_config { 161 xpt_traverse_depth depth; 162 void *tr_func; 163 void *tr_arg; 164 }; 165 166 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 167 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 168 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 169 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 170 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 171 172 /* Transport layer configuration information */ 173 static struct xpt_softc xsoftc; 174 175 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF); 176 177 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 178 &xsoftc.boot_delay, 0, "Bus registration wait time"); 179 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD, 180 &xsoftc.xpt_generation, 0, "CAM peripheral generation count"); 181 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN, 182 &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements"); 183 184 struct cam_doneq { 185 struct mtx_padalign cam_doneq_mtx; 186 STAILQ_HEAD(, ccb_hdr) cam_doneq; 187 int cam_doneq_sleep; 188 }; 189 190 static struct cam_doneq cam_doneqs[MAXCPU]; 191 static int cam_num_doneqs; 192 static struct proc *cam_proc; 193 194 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 195 &cam_num_doneqs, 0, "Number of completion queues/threads"); 196 197 struct cam_periph *xpt_periph; 198 199 static periph_init_t xpt_periph_init; 200 201 static struct periph_driver xpt_driver = 202 { 203 xpt_periph_init, "xpt", 204 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 205 CAM_PERIPH_DRV_EARLY 206 }; 207 208 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 209 210 static d_open_t xptopen; 211 static d_close_t xptclose; 212 static d_ioctl_t xptioctl; 213 static d_ioctl_t xptdoioctl; 214 215 static struct cdevsw xpt_cdevsw = { 216 .d_version = D_VERSION, 217 .d_flags = 0, 218 .d_open = xptopen, 219 .d_close = xptclose, 220 .d_ioctl = xptioctl, 221 .d_name = "xpt", 222 }; 223 224 /* Storage for debugging datastructures */ 225 struct cam_path *cam_dpath; 226 u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 227 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN, 228 &cam_dflags, 0, "Enabled debug flags"); 229 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 230 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN, 231 &cam_debug_delay, 0, "Delay in us after each debug message"); 232 233 /* Our boot-time initialization hook */ 234 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 235 236 static moduledata_t cam_moduledata = { 237 "cam", 238 cam_module_event_handler, 239 NULL 240 }; 241 242 static int xpt_init(void *); 243 244 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 245 MODULE_VERSION(cam, 1); 246 247 248 static void xpt_async_bcast(struct async_list *async_head, 249 u_int32_t async_code, 250 struct cam_path *path, 251 void *async_arg); 252 static path_id_t xptnextfreepathid(void); 253 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 254 static union ccb *xpt_get_ccb(struct cam_periph *periph); 255 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 256 static void xpt_run_allocq(struct cam_periph *periph, int sleep); 257 static void xpt_run_allocq_task(void *context, int pending); 258 static void xpt_run_devq(struct cam_devq *devq); 259 static timeout_t xpt_release_devq_timeout; 260 static void xpt_release_simq_timeout(void *arg) __unused; 261 static void xpt_acquire_bus(struct cam_eb *bus); 262 static void xpt_release_bus(struct cam_eb *bus); 263 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 264 static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 265 int run_queue); 266 static struct cam_et* 267 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 268 static void xpt_acquire_target(struct cam_et *target); 269 static void xpt_release_target(struct cam_et *target); 270 static struct cam_eb* 271 xpt_find_bus(path_id_t path_id); 272 static struct cam_et* 273 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 274 static struct cam_ed* 275 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 276 static void xpt_config(void *arg); 277 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 278 u_int32_t new_priority); 279 static xpt_devicefunc_t xptpassannouncefunc; 280 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 281 static void xptpoll(struct cam_sim *sim); 282 static void camisr_runqueue(void); 283 static void xpt_done_process(struct ccb_hdr *ccb_h); 284 static void xpt_done_td(void *); 285 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 286 u_int num_patterns, struct cam_eb *bus); 287 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 288 u_int num_patterns, 289 struct cam_ed *device); 290 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 291 u_int num_patterns, 292 struct cam_periph *periph); 293 static xpt_busfunc_t xptedtbusfunc; 294 static xpt_targetfunc_t xptedttargetfunc; 295 static xpt_devicefunc_t xptedtdevicefunc; 296 static xpt_periphfunc_t xptedtperiphfunc; 297 static xpt_pdrvfunc_t xptplistpdrvfunc; 298 static xpt_periphfunc_t xptplistperiphfunc; 299 static int xptedtmatch(struct ccb_dev_match *cdm); 300 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 301 static int xptbustraverse(struct cam_eb *start_bus, 302 xpt_busfunc_t *tr_func, void *arg); 303 static int xpttargettraverse(struct cam_eb *bus, 304 struct cam_et *start_target, 305 xpt_targetfunc_t *tr_func, void *arg); 306 static int xptdevicetraverse(struct cam_et *target, 307 struct cam_ed *start_device, 308 xpt_devicefunc_t *tr_func, void *arg); 309 static int xptperiphtraverse(struct cam_ed *device, 310 struct cam_periph *start_periph, 311 xpt_periphfunc_t *tr_func, void *arg); 312 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 313 xpt_pdrvfunc_t *tr_func, void *arg); 314 static int xptpdperiphtraverse(struct periph_driver **pdrv, 315 struct cam_periph *start_periph, 316 xpt_periphfunc_t *tr_func, 317 void *arg); 318 static xpt_busfunc_t xptdefbusfunc; 319 static xpt_targetfunc_t xptdeftargetfunc; 320 static xpt_devicefunc_t xptdefdevicefunc; 321 static xpt_periphfunc_t xptdefperiphfunc; 322 static void xpt_finishconfig_task(void *context, int pending); 323 static void xpt_dev_async_default(u_int32_t async_code, 324 struct cam_eb *bus, 325 struct cam_et *target, 326 struct cam_ed *device, 327 void *async_arg); 328 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 329 struct cam_et *target, 330 lun_id_t lun_id); 331 static xpt_devicefunc_t xptsetasyncfunc; 332 static xpt_busfunc_t xptsetasyncbusfunc; 333 static cam_status xptregister(struct cam_periph *periph, 334 void *arg); 335 static __inline int device_is_queued(struct cam_ed *device); 336 337 static __inline int 338 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 339 { 340 int retval; 341 342 mtx_assert(&devq->send_mtx, MA_OWNED); 343 if ((dev->ccbq.queue.entries > 0) && 344 (dev->ccbq.dev_openings > 0) && 345 (dev->ccbq.queue.qfrozen_cnt == 0)) { 346 /* 347 * The priority of a device waiting for controller 348 * resources is that of the highest priority CCB 349 * enqueued. 350 */ 351 retval = 352 xpt_schedule_dev(&devq->send_queue, 353 &dev->devq_entry, 354 CAMQ_GET_PRIO(&dev->ccbq.queue)); 355 } else { 356 retval = 0; 357 } 358 return (retval); 359 } 360 361 static __inline int 362 device_is_queued(struct cam_ed *device) 363 { 364 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 365 } 366 367 static void 368 xpt_periph_init() 369 { 370 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 371 } 372 373 static int 374 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 375 { 376 377 /* 378 * Only allow read-write access. 379 */ 380 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 381 return(EPERM); 382 383 /* 384 * We don't allow nonblocking access. 385 */ 386 if ((flags & O_NONBLOCK) != 0) { 387 printf("%s: can't do nonblocking access\n", devtoname(dev)); 388 return(ENODEV); 389 } 390 391 return(0); 392 } 393 394 static int 395 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 396 { 397 398 return(0); 399 } 400 401 /* 402 * Don't automatically grab the xpt softc lock here even though this is going 403 * through the xpt device. The xpt device is really just a back door for 404 * accessing other devices and SIMs, so the right thing to do is to grab 405 * the appropriate SIM lock once the bus/SIM is located. 406 */ 407 static int 408 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 409 { 410 int error; 411 412 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 413 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 414 } 415 return (error); 416 } 417 418 static int 419 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 420 { 421 int error; 422 423 error = 0; 424 425 switch(cmd) { 426 /* 427 * For the transport layer CAMIOCOMMAND ioctl, we really only want 428 * to accept CCB types that don't quite make sense to send through a 429 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 430 * in the CAM spec. 431 */ 432 case CAMIOCOMMAND: { 433 union ccb *ccb; 434 union ccb *inccb; 435 struct cam_eb *bus; 436 437 inccb = (union ccb *)addr; 438 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 439 if (inccb->ccb_h.func_code == XPT_SCSI_IO) 440 inccb->csio.bio = NULL; 441 #endif 442 443 if (inccb->ccb_h.flags & CAM_UNLOCKED) 444 return (EINVAL); 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 /* 481 * Create a path using the bus, target, and lun the 482 * user passed in. 483 */ 484 if (xpt_create_path(&ccb->ccb_h.path, NULL, 485 inccb->ccb_h.path_id, 486 inccb->ccb_h.target_id, 487 inccb->ccb_h.target_lun) != 488 CAM_REQ_CMP){ 489 error = EINVAL; 490 xpt_free_ccb(ccb); 491 break; 492 } 493 /* Ensure all of our fields are correct */ 494 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 495 inccb->ccb_h.pinfo.priority); 496 xpt_merge_ccb(ccb, inccb); 497 xpt_path_lock(ccb->ccb_h.path); 498 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 499 xpt_path_unlock(ccb->ccb_h.path); 500 bcopy(ccb, inccb, sizeof(union ccb)); 501 xpt_free_path(ccb->ccb_h.path); 502 xpt_free_ccb(ccb); 503 break; 504 505 case XPT_DEBUG: { 506 union ccb ccb; 507 508 /* 509 * This is an immediate CCB, so it's okay to 510 * allocate it on the stack. 511 */ 512 513 /* 514 * Create a path using the bus, target, and lun the 515 * user passed in. 516 */ 517 if (xpt_create_path(&ccb.ccb_h.path, NULL, 518 inccb->ccb_h.path_id, 519 inccb->ccb_h.target_id, 520 inccb->ccb_h.target_lun) != 521 CAM_REQ_CMP){ 522 error = EINVAL; 523 break; 524 } 525 /* Ensure all of our fields are correct */ 526 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 527 inccb->ccb_h.pinfo.priority); 528 xpt_merge_ccb(&ccb, inccb); 529 xpt_action(&ccb); 530 bcopy(&ccb, inccb, sizeof(union ccb)); 531 xpt_free_path(ccb.ccb_h.path); 532 break; 533 534 } 535 case XPT_DEV_MATCH: { 536 struct cam_periph_map_info mapinfo; 537 struct cam_path *old_path; 538 539 /* 540 * We can't deal with physical addresses for this 541 * type of transaction. 542 */ 543 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 544 CAM_DATA_VADDR) { 545 error = EINVAL; 546 break; 547 } 548 549 /* 550 * Save this in case the caller had it set to 551 * something in particular. 552 */ 553 old_path = inccb->ccb_h.path; 554 555 /* 556 * We really don't need a path for the matching 557 * code. The path is needed because of the 558 * debugging statements in xpt_action(). They 559 * assume that the CCB has a valid path. 560 */ 561 inccb->ccb_h.path = xpt_periph->path; 562 563 bzero(&mapinfo, sizeof(mapinfo)); 564 565 /* 566 * Map the pattern and match buffers into kernel 567 * virtual address space. 568 */ 569 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS); 570 571 if (error) { 572 inccb->ccb_h.path = old_path; 573 break; 574 } 575 576 /* 577 * This is an immediate CCB, we can send it on directly. 578 */ 579 xpt_action(inccb); 580 581 /* 582 * Map the buffers back into user space. 583 */ 584 cam_periph_unmapmem(inccb, &mapinfo); 585 586 inccb->ccb_h.path = old_path; 587 588 error = 0; 589 break; 590 } 591 default: 592 error = ENOTSUP; 593 break; 594 } 595 xpt_release_bus(bus); 596 break; 597 } 598 /* 599 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 600 * with the periphal driver name and unit name filled in. The other 601 * fields don't really matter as input. The passthrough driver name 602 * ("pass"), and unit number are passed back in the ccb. The current 603 * device generation number, and the index into the device peripheral 604 * driver list, and the status are also passed back. Note that 605 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 606 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 607 * (or rather should be) impossible for the device peripheral driver 608 * list to change since we look at the whole thing in one pass, and 609 * we do it with lock protection. 610 * 611 */ 612 case CAMGETPASSTHRU: { 613 union ccb *ccb; 614 struct cam_periph *periph; 615 struct periph_driver **p_drv; 616 char *name; 617 u_int unit; 618 int base_periph_found; 619 620 ccb = (union ccb *)addr; 621 unit = ccb->cgdl.unit_number; 622 name = ccb->cgdl.periph_name; 623 base_periph_found = 0; 624 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 625 if (ccb->ccb_h.func_code == XPT_SCSI_IO) 626 ccb->csio.bio = NULL; 627 #endif 628 629 /* 630 * Sanity check -- make sure we don't get a null peripheral 631 * driver name. 632 */ 633 if (*ccb->cgdl.periph_name == '\0') { 634 error = EINVAL; 635 break; 636 } 637 638 /* Keep the list from changing while we traverse it */ 639 xpt_lock_buses(); 640 641 /* first find our driver in the list of drivers */ 642 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 643 if (strcmp((*p_drv)->driver_name, name) == 0) 644 break; 645 646 if (*p_drv == NULL) { 647 xpt_unlock_buses(); 648 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 649 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 650 *ccb->cgdl.periph_name = '\0'; 651 ccb->cgdl.unit_number = 0; 652 error = ENOENT; 653 break; 654 } 655 656 /* 657 * Run through every peripheral instance of this driver 658 * and check to see whether it matches the unit passed 659 * in by the user. If it does, get out of the loops and 660 * find the passthrough driver associated with that 661 * peripheral driver. 662 */ 663 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 664 periph = TAILQ_NEXT(periph, unit_links)) { 665 666 if (periph->unit_number == unit) 667 break; 668 } 669 /* 670 * If we found the peripheral driver that the user passed 671 * in, go through all of the peripheral drivers for that 672 * particular device and look for a passthrough driver. 673 */ 674 if (periph != NULL) { 675 struct cam_ed *device; 676 int i; 677 678 base_periph_found = 1; 679 device = periph->path->device; 680 for (i = 0, periph = SLIST_FIRST(&device->periphs); 681 periph != NULL; 682 periph = SLIST_NEXT(periph, periph_links), i++) { 683 /* 684 * Check to see whether we have a 685 * passthrough device or not. 686 */ 687 if (strcmp(periph->periph_name, "pass") == 0) { 688 /* 689 * Fill in the getdevlist fields. 690 */ 691 strlcpy(ccb->cgdl.periph_name, 692 periph->periph_name, 693 sizeof(ccb->cgdl.periph_name)); 694 ccb->cgdl.unit_number = 695 periph->unit_number; 696 if (SLIST_NEXT(periph, periph_links)) 697 ccb->cgdl.status = 698 CAM_GDEVLIST_MORE_DEVS; 699 else 700 ccb->cgdl.status = 701 CAM_GDEVLIST_LAST_DEVICE; 702 ccb->cgdl.generation = 703 device->generation; 704 ccb->cgdl.index = i; 705 /* 706 * Fill in some CCB header fields 707 * that the user may want. 708 */ 709 ccb->ccb_h.path_id = 710 periph->path->bus->path_id; 711 ccb->ccb_h.target_id = 712 periph->path->target->target_id; 713 ccb->ccb_h.target_lun = 714 periph->path->device->lun_id; 715 ccb->ccb_h.status = CAM_REQ_CMP; 716 break; 717 } 718 } 719 } 720 721 /* 722 * If the periph is null here, one of two things has 723 * happened. The first possibility is that we couldn't 724 * find the unit number of the particular peripheral driver 725 * that the user is asking about. e.g. the user asks for 726 * the passthrough driver for "da11". We find the list of 727 * "da" peripherals all right, but there is no unit 11. 728 * The other possibility is that we went through the list 729 * of peripheral drivers attached to the device structure, 730 * but didn't find one with the name "pass". Either way, 731 * we return ENOENT, since we couldn't find something. 732 */ 733 if (periph == NULL) { 734 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 735 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 736 *ccb->cgdl.periph_name = '\0'; 737 ccb->cgdl.unit_number = 0; 738 error = ENOENT; 739 /* 740 * It is unfortunate that this is even necessary, 741 * but there are many, many clueless users out there. 742 * If this is true, the user is looking for the 743 * passthrough driver, but doesn't have one in his 744 * kernel. 745 */ 746 if (base_periph_found == 1) { 747 printf("xptioctl: pass driver is not in the " 748 "kernel\n"); 749 printf("xptioctl: put \"device pass\" in " 750 "your kernel config file\n"); 751 } 752 } 753 xpt_unlock_buses(); 754 break; 755 } 756 default: 757 error = ENOTTY; 758 break; 759 } 760 761 return(error); 762 } 763 764 static int 765 cam_module_event_handler(module_t mod, int what, void *arg) 766 { 767 int error; 768 769 switch (what) { 770 case MOD_LOAD: 771 if ((error = xpt_init(NULL)) != 0) 772 return (error); 773 break; 774 case MOD_UNLOAD: 775 return EBUSY; 776 default: 777 return EOPNOTSUPP; 778 } 779 780 return 0; 781 } 782 783 static struct xpt_proto * 784 xpt_proto_find(cam_proto proto) 785 { 786 struct xpt_proto **pp; 787 788 SET_FOREACH(pp, cam_xpt_proto_set) { 789 if ((*pp)->proto == proto) 790 return *pp; 791 } 792 793 return NULL; 794 } 795 796 static void 797 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 798 { 799 800 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 801 xpt_free_path(done_ccb->ccb_h.path); 802 xpt_free_ccb(done_ccb); 803 } else { 804 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 805 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 806 } 807 xpt_release_boot(); 808 } 809 810 /* thread to handle bus rescans */ 811 static void 812 xpt_scanner_thread(void *dummy) 813 { 814 union ccb *ccb; 815 struct cam_path path; 816 817 xpt_lock_buses(); 818 for (;;) { 819 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 820 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 821 "-", 0); 822 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 823 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 824 xpt_unlock_buses(); 825 826 /* 827 * Since lock can be dropped inside and path freed 828 * by completion callback even before return here, 829 * take our own path copy for reference. 830 */ 831 xpt_copy_path(&path, ccb->ccb_h.path); 832 xpt_path_lock(&path); 833 xpt_action(ccb); 834 xpt_path_unlock(&path); 835 xpt_release_path(&path); 836 837 xpt_lock_buses(); 838 } 839 } 840 } 841 842 void 843 xpt_rescan(union ccb *ccb) 844 { 845 struct ccb_hdr *hdr; 846 847 /* Prepare request */ 848 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 849 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 850 ccb->ccb_h.func_code = XPT_SCAN_BUS; 851 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 852 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 853 ccb->ccb_h.func_code = XPT_SCAN_TGT; 854 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 855 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 856 ccb->ccb_h.func_code = XPT_SCAN_LUN; 857 else { 858 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 859 xpt_free_path(ccb->ccb_h.path); 860 xpt_free_ccb(ccb); 861 return; 862 } 863 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 864 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code, 865 xpt_action_name(ccb->ccb_h.func_code))); 866 867 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 868 ccb->ccb_h.cbfcnp = xpt_rescan_done; 869 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 870 /* Don't make duplicate entries for the same paths. */ 871 xpt_lock_buses(); 872 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 873 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 874 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 875 wakeup(&xsoftc.ccb_scanq); 876 xpt_unlock_buses(); 877 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 878 xpt_free_path(ccb->ccb_h.path); 879 xpt_free_ccb(ccb); 880 return; 881 } 882 } 883 } 884 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 885 xsoftc.buses_to_config++; 886 wakeup(&xsoftc.ccb_scanq); 887 xpt_unlock_buses(); 888 } 889 890 /* Functions accessed by the peripheral drivers */ 891 static int 892 xpt_init(void *dummy) 893 { 894 struct cam_sim *xpt_sim; 895 struct cam_path *path; 896 struct cam_devq *devq; 897 cam_status status; 898 int error, i; 899 900 TAILQ_INIT(&xsoftc.xpt_busses); 901 TAILQ_INIT(&xsoftc.ccb_scanq); 902 STAILQ_INIT(&xsoftc.highpowerq); 903 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 904 905 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 906 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 907 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 908 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 909 910 #ifdef CAM_BOOT_DELAY 911 /* 912 * Override this value at compile time to assist our users 913 * who don't use loader to boot a kernel. 914 */ 915 xsoftc.boot_delay = CAM_BOOT_DELAY; 916 #endif 917 /* 918 * The xpt layer is, itself, the equivalent of a SIM. 919 * Allow 16 ccbs in the ccb pool for it. This should 920 * give decent parallelism when we probe buses and 921 * perform other XPT functions. 922 */ 923 devq = cam_simq_alloc(16); 924 xpt_sim = cam_sim_alloc(xptaction, 925 xptpoll, 926 "xpt", 927 /*softc*/NULL, 928 /*unit*/0, 929 /*mtx*/&xsoftc.xpt_lock, 930 /*max_dev_transactions*/0, 931 /*max_tagged_dev_transactions*/0, 932 devq); 933 if (xpt_sim == NULL) 934 return (ENOMEM); 935 936 mtx_lock(&xsoftc.xpt_lock); 937 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 938 mtx_unlock(&xsoftc.xpt_lock); 939 printf("xpt_init: xpt_bus_register failed with status %#x," 940 " failing attach\n", status); 941 return (EINVAL); 942 } 943 mtx_unlock(&xsoftc.xpt_lock); 944 945 /* 946 * Looking at the XPT from the SIM layer, the XPT is 947 * the equivalent of a peripheral driver. Allocate 948 * a peripheral driver entry for us. 949 */ 950 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 951 CAM_TARGET_WILDCARD, 952 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 953 printf("xpt_init: xpt_create_path failed with status %#x," 954 " failing attach\n", status); 955 return (EINVAL); 956 } 957 xpt_path_lock(path); 958 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 959 path, NULL, 0, xpt_sim); 960 xpt_path_unlock(path); 961 xpt_free_path(path); 962 963 if (cam_num_doneqs < 1) 964 cam_num_doneqs = 1 + mp_ncpus / 6; 965 else if (cam_num_doneqs > MAXCPU) 966 cam_num_doneqs = MAXCPU; 967 for (i = 0; i < cam_num_doneqs; i++) { 968 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 969 MTX_DEF); 970 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 971 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 972 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 973 if (error != 0) { 974 cam_num_doneqs = i; 975 break; 976 } 977 } 978 if (cam_num_doneqs < 1) { 979 printf("xpt_init: Cannot init completion queues " 980 "- failing attach\n"); 981 return (ENOMEM); 982 } 983 /* 984 * Register a callback for when interrupts are enabled. 985 */ 986 xsoftc.xpt_config_hook = 987 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 988 M_CAMXPT, M_NOWAIT | M_ZERO); 989 if (xsoftc.xpt_config_hook == NULL) { 990 printf("xpt_init: Cannot malloc config hook " 991 "- failing attach\n"); 992 return (ENOMEM); 993 } 994 xsoftc.xpt_config_hook->ich_func = xpt_config; 995 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 996 free (xsoftc.xpt_config_hook, M_CAMXPT); 997 printf("xpt_init: config_intrhook_establish failed " 998 "- failing attach\n"); 999 } 1000 1001 return (0); 1002 } 1003 1004 static cam_status 1005 xptregister(struct cam_periph *periph, void *arg) 1006 { 1007 struct cam_sim *xpt_sim; 1008 1009 if (periph == NULL) { 1010 printf("xptregister: periph was NULL!!\n"); 1011 return(CAM_REQ_CMP_ERR); 1012 } 1013 1014 xpt_sim = (struct cam_sim *)arg; 1015 xpt_sim->softc = periph; 1016 xpt_periph = periph; 1017 periph->softc = NULL; 1018 1019 return(CAM_REQ_CMP); 1020 } 1021 1022 int32_t 1023 xpt_add_periph(struct cam_periph *periph) 1024 { 1025 struct cam_ed *device; 1026 int32_t status; 1027 1028 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 1029 device = periph->path->device; 1030 status = CAM_REQ_CMP; 1031 if (device != NULL) { 1032 mtx_lock(&device->target->bus->eb_mtx); 1033 device->generation++; 1034 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 1035 mtx_unlock(&device->target->bus->eb_mtx); 1036 atomic_add_32(&xsoftc.xpt_generation, 1); 1037 } 1038 1039 return (status); 1040 } 1041 1042 void 1043 xpt_remove_periph(struct cam_periph *periph) 1044 { 1045 struct cam_ed *device; 1046 1047 device = periph->path->device; 1048 if (device != NULL) { 1049 mtx_lock(&device->target->bus->eb_mtx); 1050 device->generation++; 1051 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 1052 mtx_unlock(&device->target->bus->eb_mtx); 1053 atomic_add_32(&xsoftc.xpt_generation, 1); 1054 } 1055 } 1056 1057 1058 void 1059 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1060 { 1061 struct cam_path *path = periph->path; 1062 struct xpt_proto *proto; 1063 1064 cam_periph_assert(periph, MA_OWNED); 1065 periph->flags |= CAM_PERIPH_ANNOUNCED; 1066 1067 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\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 (uintmax_t)path->device->lun_id); 1075 printf("%s%d: ", periph->periph_name, periph->unit_number); 1076 proto = xpt_proto_find(path->device->protocol); 1077 if (proto) 1078 proto->ops->announce(path->device); 1079 else 1080 printf("%s%d: Unknown protocol device %d\n", 1081 periph->periph_name, periph->unit_number, 1082 path->device->protocol); 1083 if (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->ops->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_periph_sbuf(struct cam_periph *periph, struct sbuf *sb, 1104 char *announce_string) 1105 { 1106 struct cam_path *path = periph->path; 1107 struct xpt_proto *proto; 1108 1109 cam_periph_assert(periph, MA_OWNED); 1110 periph->flags |= CAM_PERIPH_ANNOUNCED; 1111 1112 /* Fall back to the non-sbuf method if necessary */ 1113 if (xsoftc.announce_nosbuf != 0) { 1114 xpt_announce_periph(periph, announce_string); 1115 return; 1116 } 1117 proto = xpt_proto_find(path->device->protocol); 1118 if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) || 1119 (path->bus->xport->ops->announce_sbuf == NULL)) { 1120 xpt_announce_periph(periph, announce_string); 1121 return; 1122 } 1123 1124 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1125 periph->periph_name, periph->unit_number, 1126 path->bus->sim->sim_name, 1127 path->bus->sim->unit_number, 1128 path->bus->sim->bus_id, 1129 path->bus->path_id, 1130 path->target->target_id, 1131 (uintmax_t)path->device->lun_id); 1132 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number); 1133 1134 if (proto) 1135 proto->ops->announce_sbuf(path->device, sb); 1136 else 1137 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n", 1138 periph->periph_name, periph->unit_number, 1139 path->device->protocol); 1140 if (path->device->serial_num_len > 0) { 1141 /* Don't wrap the screen - print only the first 60 chars */ 1142 sbuf_printf(sb, "%s%d: Serial Number %.60s\n", 1143 periph->periph_name, periph->unit_number, 1144 path->device->serial_num); 1145 } 1146 /* Announce transport details. */ 1147 path->bus->xport->ops->announce_sbuf(periph, sb); 1148 /* Announce command queueing. */ 1149 if (path->device->inq_flags & SID_CmdQue 1150 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1151 sbuf_printf(sb, "%s%d: Command Queueing enabled\n", 1152 periph->periph_name, periph->unit_number); 1153 } 1154 /* Announce caller's details if they've passed in. */ 1155 if (announce_string != NULL) 1156 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name, 1157 periph->unit_number, announce_string); 1158 } 1159 1160 void 1161 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1162 { 1163 if (quirks != 0) { 1164 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1165 periph->unit_number, quirks, bit_string); 1166 } 1167 } 1168 1169 void 1170 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb, 1171 int quirks, char *bit_string) 1172 { 1173 if (xsoftc.announce_nosbuf != 0) { 1174 xpt_announce_quirks(periph, quirks, bit_string); 1175 return; 1176 } 1177 1178 if (quirks != 0) { 1179 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name, 1180 periph->unit_number, quirks, bit_string); 1181 } 1182 } 1183 1184 void 1185 xpt_denounce_periph(struct cam_periph *periph) 1186 { 1187 struct cam_path *path = periph->path; 1188 struct xpt_proto *proto; 1189 1190 cam_periph_assert(periph, MA_OWNED); 1191 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1192 periph->periph_name, periph->unit_number, 1193 path->bus->sim->sim_name, 1194 path->bus->sim->unit_number, 1195 path->bus->sim->bus_id, 1196 path->bus->path_id, 1197 path->target->target_id, 1198 (uintmax_t)path->device->lun_id); 1199 printf("%s%d: ", periph->periph_name, periph->unit_number); 1200 proto = xpt_proto_find(path->device->protocol); 1201 if (proto) 1202 proto->ops->denounce(path->device); 1203 else 1204 printf("%s%d: Unknown protocol device %d\n", 1205 periph->periph_name, periph->unit_number, 1206 path->device->protocol); 1207 if (path->device->serial_num_len > 0) 1208 printf(" s/n %.60s", path->device->serial_num); 1209 printf(" detached\n"); 1210 } 1211 1212 void 1213 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb) 1214 { 1215 struct cam_path *path = periph->path; 1216 struct xpt_proto *proto; 1217 1218 cam_periph_assert(periph, MA_OWNED); 1219 1220 /* Fall back to the non-sbuf method if necessary */ 1221 if (xsoftc.announce_nosbuf != 0) { 1222 xpt_denounce_periph(periph); 1223 return; 1224 } 1225 proto = xpt_proto_find(path->device->protocol); 1226 if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) { 1227 xpt_denounce_periph(periph); 1228 return; 1229 } 1230 1231 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1232 periph->periph_name, periph->unit_number, 1233 path->bus->sim->sim_name, 1234 path->bus->sim->unit_number, 1235 path->bus->sim->bus_id, 1236 path->bus->path_id, 1237 path->target->target_id, 1238 (uintmax_t)path->device->lun_id); 1239 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number); 1240 1241 if (proto) 1242 proto->ops->denounce_sbuf(path->device, sb); 1243 else 1244 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n", 1245 periph->periph_name, periph->unit_number, 1246 path->device->protocol); 1247 if (path->device->serial_num_len > 0) 1248 sbuf_printf(sb, " s/n %.60s", path->device->serial_num); 1249 sbuf_printf(sb, " detached\n"); 1250 } 1251 1252 int 1253 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1254 { 1255 int ret = -1, l, o; 1256 struct ccb_dev_advinfo cdai; 1257 struct scsi_vpd_id_descriptor *idd; 1258 1259 xpt_path_assert(path, MA_OWNED); 1260 1261 memset(&cdai, 0, sizeof(cdai)); 1262 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1263 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1264 cdai.flags = CDAI_FLAG_NONE; 1265 cdai.bufsiz = len; 1266 1267 if (!strcmp(attr, "GEOM::ident")) 1268 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1269 else if (!strcmp(attr, "GEOM::physpath")) 1270 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1271 else if (strcmp(attr, "GEOM::lunid") == 0 || 1272 strcmp(attr, "GEOM::lunname") == 0) { 1273 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1274 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1275 } else 1276 goto out; 1277 1278 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO); 1279 if (cdai.buf == NULL) { 1280 ret = ENOMEM; 1281 goto out; 1282 } 1283 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1284 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1285 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1286 if (cdai.provsiz == 0) 1287 goto out; 1288 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) { 1289 if (strcmp(attr, "GEOM::lunid") == 0) { 1290 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1291 cdai.provsiz, scsi_devid_is_lun_naa); 1292 if (idd == NULL) 1293 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1294 cdai.provsiz, scsi_devid_is_lun_eui64); 1295 if (idd == NULL) 1296 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1297 cdai.provsiz, scsi_devid_is_lun_uuid); 1298 if (idd == NULL) 1299 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1300 cdai.provsiz, scsi_devid_is_lun_md5); 1301 } else 1302 idd = NULL; 1303 if (idd == NULL) 1304 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1305 cdai.provsiz, scsi_devid_is_lun_t10); 1306 if (idd == NULL) 1307 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1308 cdai.provsiz, scsi_devid_is_lun_name); 1309 if (idd == NULL) 1310 goto out; 1311 ret = 0; 1312 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) { 1313 if (idd->length < len) { 1314 for (l = 0; l < idd->length; l++) 1315 buf[l] = idd->identifier[l] ? 1316 idd->identifier[l] : ' '; 1317 buf[l] = 0; 1318 } else 1319 ret = EFAULT; 1320 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) { 1321 l = strnlen(idd->identifier, idd->length); 1322 if (l < len) { 1323 bcopy(idd->identifier, buf, l); 1324 buf[l] = 0; 1325 } else 1326 ret = EFAULT; 1327 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID 1328 && idd->identifier[0] == 0x10) { 1329 if ((idd->length - 2) * 2 + 4 < len) { 1330 for (l = 2, o = 0; l < idd->length; l++) { 1331 if (l == 6 || l == 8 || l == 10 || l == 12) 1332 o += sprintf(buf + o, "-"); 1333 o += sprintf(buf + o, "%02x", 1334 idd->identifier[l]); 1335 } 1336 } else 1337 ret = EFAULT; 1338 } else { 1339 if (idd->length * 2 < len) { 1340 for (l = 0; l < idd->length; l++) 1341 sprintf(buf + l * 2, "%02x", 1342 idd->identifier[l]); 1343 } else 1344 ret = EFAULT; 1345 } 1346 } else { 1347 ret = 0; 1348 if (strlcpy(buf, cdai.buf, len) >= len) 1349 ret = EFAULT; 1350 } 1351 1352 out: 1353 if (cdai.buf != NULL) 1354 free(cdai.buf, M_CAMXPT); 1355 return ret; 1356 } 1357 1358 static dev_match_ret 1359 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1360 struct cam_eb *bus) 1361 { 1362 dev_match_ret retval; 1363 u_int i; 1364 1365 retval = DM_RET_NONE; 1366 1367 /* 1368 * If we aren't given something to match against, that's an error. 1369 */ 1370 if (bus == NULL) 1371 return(DM_RET_ERROR); 1372 1373 /* 1374 * If there are no match entries, then this bus matches no 1375 * matter what. 1376 */ 1377 if ((patterns == NULL) || (num_patterns == 0)) 1378 return(DM_RET_DESCEND | DM_RET_COPY); 1379 1380 for (i = 0; i < num_patterns; i++) { 1381 struct bus_match_pattern *cur_pattern; 1382 1383 /* 1384 * If the pattern in question isn't for a bus node, we 1385 * aren't interested. However, we do indicate to the 1386 * calling routine that we should continue descending the 1387 * tree, since the user wants to match against lower-level 1388 * EDT elements. 1389 */ 1390 if (patterns[i].type != DEV_MATCH_BUS) { 1391 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1392 retval |= DM_RET_DESCEND; 1393 continue; 1394 } 1395 1396 cur_pattern = &patterns[i].pattern.bus_pattern; 1397 1398 /* 1399 * If they want to match any bus node, we give them any 1400 * device node. 1401 */ 1402 if (cur_pattern->flags == BUS_MATCH_ANY) { 1403 /* set the copy flag */ 1404 retval |= DM_RET_COPY; 1405 1406 /* 1407 * If we've already decided on an action, go ahead 1408 * and return. 1409 */ 1410 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1411 return(retval); 1412 } 1413 1414 /* 1415 * Not sure why someone would do this... 1416 */ 1417 if (cur_pattern->flags == BUS_MATCH_NONE) 1418 continue; 1419 1420 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1421 && (cur_pattern->path_id != bus->path_id)) 1422 continue; 1423 1424 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1425 && (cur_pattern->bus_id != bus->sim->bus_id)) 1426 continue; 1427 1428 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1429 && (cur_pattern->unit_number != bus->sim->unit_number)) 1430 continue; 1431 1432 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1433 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1434 DEV_IDLEN) != 0)) 1435 continue; 1436 1437 /* 1438 * If we get to this point, the user definitely wants 1439 * information on this bus. So tell the caller to copy the 1440 * data out. 1441 */ 1442 retval |= DM_RET_COPY; 1443 1444 /* 1445 * If the return action has been set to descend, then we 1446 * know that we've already seen a non-bus matching 1447 * expression, therefore we need to further descend the tree. 1448 * This won't change by continuing around the loop, so we 1449 * go ahead and return. If we haven't seen a non-bus 1450 * matching expression, we keep going around the loop until 1451 * we exhaust the matching expressions. We'll set the stop 1452 * flag once we fall out of the loop. 1453 */ 1454 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1455 return(retval); 1456 } 1457 1458 /* 1459 * If the return action hasn't been set to descend yet, that means 1460 * we haven't seen anything other than bus matching patterns. So 1461 * tell the caller to stop descending the tree -- the user doesn't 1462 * want to match against lower level tree elements. 1463 */ 1464 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1465 retval |= DM_RET_STOP; 1466 1467 return(retval); 1468 } 1469 1470 static dev_match_ret 1471 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1472 struct cam_ed *device) 1473 { 1474 dev_match_ret retval; 1475 u_int i; 1476 1477 retval = DM_RET_NONE; 1478 1479 /* 1480 * If we aren't given something to match against, that's an error. 1481 */ 1482 if (device == NULL) 1483 return(DM_RET_ERROR); 1484 1485 /* 1486 * If there are no match entries, then this device matches no 1487 * matter what. 1488 */ 1489 if ((patterns == NULL) || (num_patterns == 0)) 1490 return(DM_RET_DESCEND | DM_RET_COPY); 1491 1492 for (i = 0; i < num_patterns; i++) { 1493 struct device_match_pattern *cur_pattern; 1494 struct scsi_vpd_device_id *device_id_page; 1495 1496 /* 1497 * If the pattern in question isn't for a device node, we 1498 * aren't interested. 1499 */ 1500 if (patterns[i].type != DEV_MATCH_DEVICE) { 1501 if ((patterns[i].type == DEV_MATCH_PERIPH) 1502 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1503 retval |= DM_RET_DESCEND; 1504 continue; 1505 } 1506 1507 cur_pattern = &patterns[i].pattern.device_pattern; 1508 1509 /* Error out if mutually exclusive options are specified. */ 1510 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1511 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1512 return(DM_RET_ERROR); 1513 1514 /* 1515 * If they want to match any device node, we give them any 1516 * device node. 1517 */ 1518 if (cur_pattern->flags == DEV_MATCH_ANY) 1519 goto copy_dev_node; 1520 1521 /* 1522 * Not sure why someone would do this... 1523 */ 1524 if (cur_pattern->flags == DEV_MATCH_NONE) 1525 continue; 1526 1527 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1528 && (cur_pattern->path_id != device->target->bus->path_id)) 1529 continue; 1530 1531 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1532 && (cur_pattern->target_id != device->target->target_id)) 1533 continue; 1534 1535 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1536 && (cur_pattern->target_lun != device->lun_id)) 1537 continue; 1538 1539 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1540 && (cam_quirkmatch((caddr_t)&device->inq_data, 1541 (caddr_t)&cur_pattern->data.inq_pat, 1542 1, sizeof(cur_pattern->data.inq_pat), 1543 scsi_static_inquiry_match) == NULL)) 1544 continue; 1545 1546 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1547 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1548 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1549 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1550 device->device_id_len 1551 - SVPD_DEVICE_ID_HDR_LEN, 1552 cur_pattern->data.devid_pat.id, 1553 cur_pattern->data.devid_pat.id_len) != 0)) 1554 continue; 1555 1556 copy_dev_node: 1557 /* 1558 * If we get to this point, the user definitely wants 1559 * information on this device. So tell the caller to copy 1560 * the data out. 1561 */ 1562 retval |= DM_RET_COPY; 1563 1564 /* 1565 * If the return action has been set to descend, then we 1566 * know that we've already seen a peripheral matching 1567 * expression, therefore we need to further descend the tree. 1568 * This won't change by continuing around the loop, so we 1569 * go ahead and return. If we haven't seen a peripheral 1570 * matching expression, we keep going around the loop until 1571 * we exhaust the matching expressions. We'll set the stop 1572 * flag once we fall out of the loop. 1573 */ 1574 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1575 return(retval); 1576 } 1577 1578 /* 1579 * If the return action hasn't been set to descend yet, that means 1580 * we haven't seen any peripheral matching patterns. So tell the 1581 * caller to stop descending the tree -- the user doesn't want to 1582 * match against lower level tree elements. 1583 */ 1584 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1585 retval |= DM_RET_STOP; 1586 1587 return(retval); 1588 } 1589 1590 /* 1591 * Match a single peripheral against any number of match patterns. 1592 */ 1593 static dev_match_ret 1594 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1595 struct cam_periph *periph) 1596 { 1597 dev_match_ret retval; 1598 u_int i; 1599 1600 /* 1601 * If we aren't given something to match against, that's an error. 1602 */ 1603 if (periph == NULL) 1604 return(DM_RET_ERROR); 1605 1606 /* 1607 * If there are no match entries, then this peripheral matches no 1608 * matter what. 1609 */ 1610 if ((patterns == NULL) || (num_patterns == 0)) 1611 return(DM_RET_STOP | DM_RET_COPY); 1612 1613 /* 1614 * There aren't any nodes below a peripheral node, so there's no 1615 * reason to descend the tree any further. 1616 */ 1617 retval = DM_RET_STOP; 1618 1619 for (i = 0; i < num_patterns; i++) { 1620 struct periph_match_pattern *cur_pattern; 1621 1622 /* 1623 * If the pattern in question isn't for a peripheral, we 1624 * aren't interested. 1625 */ 1626 if (patterns[i].type != DEV_MATCH_PERIPH) 1627 continue; 1628 1629 cur_pattern = &patterns[i].pattern.periph_pattern; 1630 1631 /* 1632 * If they want to match on anything, then we will do so. 1633 */ 1634 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1635 /* set the copy flag */ 1636 retval |= DM_RET_COPY; 1637 1638 /* 1639 * We've already set the return action to stop, 1640 * since there are no nodes below peripherals in 1641 * the tree. 1642 */ 1643 return(retval); 1644 } 1645 1646 /* 1647 * Not sure why someone would do this... 1648 */ 1649 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1650 continue; 1651 1652 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1653 && (cur_pattern->path_id != periph->path->bus->path_id)) 1654 continue; 1655 1656 /* 1657 * For the target and lun id's, we have to make sure the 1658 * target and lun pointers aren't NULL. The xpt peripheral 1659 * has a wildcard target and device. 1660 */ 1661 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1662 && ((periph->path->target == NULL) 1663 ||(cur_pattern->target_id != periph->path->target->target_id))) 1664 continue; 1665 1666 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1667 && ((periph->path->device == NULL) 1668 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1669 continue; 1670 1671 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1672 && (cur_pattern->unit_number != periph->unit_number)) 1673 continue; 1674 1675 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1676 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1677 DEV_IDLEN) != 0)) 1678 continue; 1679 1680 /* 1681 * If we get to this point, the user definitely wants 1682 * information on this peripheral. So tell the caller to 1683 * copy the data out. 1684 */ 1685 retval |= DM_RET_COPY; 1686 1687 /* 1688 * The return action has already been set to stop, since 1689 * peripherals don't have any nodes below them in the EDT. 1690 */ 1691 return(retval); 1692 } 1693 1694 /* 1695 * If we get to this point, the peripheral that was passed in 1696 * doesn't match any of the patterns. 1697 */ 1698 return(retval); 1699 } 1700 1701 static int 1702 xptedtbusfunc(struct cam_eb *bus, void *arg) 1703 { 1704 struct ccb_dev_match *cdm; 1705 struct cam_et *target; 1706 dev_match_ret retval; 1707 1708 cdm = (struct ccb_dev_match *)arg; 1709 1710 /* 1711 * If our position is for something deeper in the tree, that means 1712 * that we've already seen this node. So, we keep going down. 1713 */ 1714 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1715 && (cdm->pos.cookie.bus == bus) 1716 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1717 && (cdm->pos.cookie.target != NULL)) 1718 retval = DM_RET_DESCEND; 1719 else 1720 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1721 1722 /* 1723 * If we got an error, bail out of the search. 1724 */ 1725 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1726 cdm->status = CAM_DEV_MATCH_ERROR; 1727 return(0); 1728 } 1729 1730 /* 1731 * If the copy flag is set, copy this bus out. 1732 */ 1733 if (retval & DM_RET_COPY) { 1734 int spaceleft, j; 1735 1736 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1737 sizeof(struct dev_match_result)); 1738 1739 /* 1740 * If we don't have enough space to put in another 1741 * match result, save our position and tell the 1742 * user there are more devices to check. 1743 */ 1744 if (spaceleft < sizeof(struct dev_match_result)) { 1745 bzero(&cdm->pos, sizeof(cdm->pos)); 1746 cdm->pos.position_type = 1747 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1748 1749 cdm->pos.cookie.bus = bus; 1750 cdm->pos.generations[CAM_BUS_GENERATION]= 1751 xsoftc.bus_generation; 1752 cdm->status = CAM_DEV_MATCH_MORE; 1753 return(0); 1754 } 1755 j = cdm->num_matches; 1756 cdm->num_matches++; 1757 cdm->matches[j].type = DEV_MATCH_BUS; 1758 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1759 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1760 cdm->matches[j].result.bus_result.unit_number = 1761 bus->sim->unit_number; 1762 strlcpy(cdm->matches[j].result.bus_result.dev_name, 1763 bus->sim->sim_name, 1764 sizeof(cdm->matches[j].result.bus_result.dev_name)); 1765 } 1766 1767 /* 1768 * If the user is only interested in buses, there's no 1769 * reason to descend to the next level in the tree. 1770 */ 1771 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1772 return(1); 1773 1774 /* 1775 * If there is a target generation recorded, check it to 1776 * make sure the target list hasn't changed. 1777 */ 1778 mtx_lock(&bus->eb_mtx); 1779 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1780 && (cdm->pos.cookie.bus == bus) 1781 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1782 && (cdm->pos.cookie.target != NULL)) { 1783 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1784 bus->generation)) { 1785 mtx_unlock(&bus->eb_mtx); 1786 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1787 return (0); 1788 } 1789 target = (struct cam_et *)cdm->pos.cookie.target; 1790 target->refcount++; 1791 } else 1792 target = NULL; 1793 mtx_unlock(&bus->eb_mtx); 1794 1795 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1796 } 1797 1798 static int 1799 xptedttargetfunc(struct cam_et *target, void *arg) 1800 { 1801 struct ccb_dev_match *cdm; 1802 struct cam_eb *bus; 1803 struct cam_ed *device; 1804 1805 cdm = (struct ccb_dev_match *)arg; 1806 bus = target->bus; 1807 1808 /* 1809 * If there is a device list generation recorded, check it to 1810 * make sure the device list hasn't changed. 1811 */ 1812 mtx_lock(&bus->eb_mtx); 1813 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1814 && (cdm->pos.cookie.bus == bus) 1815 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1816 && (cdm->pos.cookie.target == target) 1817 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1818 && (cdm->pos.cookie.device != NULL)) { 1819 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1820 target->generation) { 1821 mtx_unlock(&bus->eb_mtx); 1822 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1823 return(0); 1824 } 1825 device = (struct cam_ed *)cdm->pos.cookie.device; 1826 device->refcount++; 1827 } else 1828 device = NULL; 1829 mtx_unlock(&bus->eb_mtx); 1830 1831 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1832 } 1833 1834 static int 1835 xptedtdevicefunc(struct cam_ed *device, void *arg) 1836 { 1837 struct cam_eb *bus; 1838 struct cam_periph *periph; 1839 struct ccb_dev_match *cdm; 1840 dev_match_ret retval; 1841 1842 cdm = (struct ccb_dev_match *)arg; 1843 bus = device->target->bus; 1844 1845 /* 1846 * If our position is for something deeper in the tree, that means 1847 * that we've already seen this node. So, we keep going down. 1848 */ 1849 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1850 && (cdm->pos.cookie.device == device) 1851 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1852 && (cdm->pos.cookie.periph != NULL)) 1853 retval = DM_RET_DESCEND; 1854 else 1855 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1856 device); 1857 1858 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1859 cdm->status = CAM_DEV_MATCH_ERROR; 1860 return(0); 1861 } 1862 1863 /* 1864 * If the copy flag is set, copy this device out. 1865 */ 1866 if (retval & DM_RET_COPY) { 1867 int spaceleft, j; 1868 1869 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1870 sizeof(struct dev_match_result)); 1871 1872 /* 1873 * If we don't have enough space to put in another 1874 * match result, save our position and tell the 1875 * user there are more devices to check. 1876 */ 1877 if (spaceleft < sizeof(struct dev_match_result)) { 1878 bzero(&cdm->pos, sizeof(cdm->pos)); 1879 cdm->pos.position_type = 1880 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1881 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1882 1883 cdm->pos.cookie.bus = device->target->bus; 1884 cdm->pos.generations[CAM_BUS_GENERATION]= 1885 xsoftc.bus_generation; 1886 cdm->pos.cookie.target = device->target; 1887 cdm->pos.generations[CAM_TARGET_GENERATION] = 1888 device->target->bus->generation; 1889 cdm->pos.cookie.device = device; 1890 cdm->pos.generations[CAM_DEV_GENERATION] = 1891 device->target->generation; 1892 cdm->status = CAM_DEV_MATCH_MORE; 1893 return(0); 1894 } 1895 j = cdm->num_matches; 1896 cdm->num_matches++; 1897 cdm->matches[j].type = DEV_MATCH_DEVICE; 1898 cdm->matches[j].result.device_result.path_id = 1899 device->target->bus->path_id; 1900 cdm->matches[j].result.device_result.target_id = 1901 device->target->target_id; 1902 cdm->matches[j].result.device_result.target_lun = 1903 device->lun_id; 1904 cdm->matches[j].result.device_result.protocol = 1905 device->protocol; 1906 bcopy(&device->inq_data, 1907 &cdm->matches[j].result.device_result.inq_data, 1908 sizeof(struct scsi_inquiry_data)); 1909 bcopy(&device->ident_data, 1910 &cdm->matches[j].result.device_result.ident_data, 1911 sizeof(struct ata_params)); 1912 bcopy(&device->mmc_ident_data, 1913 &cdm->matches[j].result.device_result.mmc_ident_data, 1914 sizeof(struct mmc_params)); 1915 1916 /* Let the user know whether this device is unconfigured */ 1917 if (device->flags & CAM_DEV_UNCONFIGURED) 1918 cdm->matches[j].result.device_result.flags = 1919 DEV_RESULT_UNCONFIGURED; 1920 else 1921 cdm->matches[j].result.device_result.flags = 1922 DEV_RESULT_NOFLAG; 1923 } 1924 1925 /* 1926 * If the user isn't interested in peripherals, don't descend 1927 * the tree any further. 1928 */ 1929 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1930 return(1); 1931 1932 /* 1933 * If there is a peripheral list generation recorded, make sure 1934 * it hasn't changed. 1935 */ 1936 xpt_lock_buses(); 1937 mtx_lock(&bus->eb_mtx); 1938 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1939 && (cdm->pos.cookie.bus == bus) 1940 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1941 && (cdm->pos.cookie.target == device->target) 1942 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1943 && (cdm->pos.cookie.device == device) 1944 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1945 && (cdm->pos.cookie.periph != NULL)) { 1946 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1947 device->generation) { 1948 mtx_unlock(&bus->eb_mtx); 1949 xpt_unlock_buses(); 1950 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1951 return(0); 1952 } 1953 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1954 periph->refcount++; 1955 } else 1956 periph = NULL; 1957 mtx_unlock(&bus->eb_mtx); 1958 xpt_unlock_buses(); 1959 1960 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1961 } 1962 1963 static int 1964 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1965 { 1966 struct ccb_dev_match *cdm; 1967 dev_match_ret retval; 1968 1969 cdm = (struct ccb_dev_match *)arg; 1970 1971 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1972 1973 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1974 cdm->status = CAM_DEV_MATCH_ERROR; 1975 return(0); 1976 } 1977 1978 /* 1979 * If the copy flag is set, copy this peripheral out. 1980 */ 1981 if (retval & DM_RET_COPY) { 1982 int spaceleft, j; 1983 size_t l; 1984 1985 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1986 sizeof(struct dev_match_result)); 1987 1988 /* 1989 * If we don't have enough space to put in another 1990 * match result, save our position and tell the 1991 * user there are more devices to check. 1992 */ 1993 if (spaceleft < sizeof(struct dev_match_result)) { 1994 bzero(&cdm->pos, sizeof(cdm->pos)); 1995 cdm->pos.position_type = 1996 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1997 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1998 CAM_DEV_POS_PERIPH; 1999 2000 cdm->pos.cookie.bus = periph->path->bus; 2001 cdm->pos.generations[CAM_BUS_GENERATION]= 2002 xsoftc.bus_generation; 2003 cdm->pos.cookie.target = periph->path->target; 2004 cdm->pos.generations[CAM_TARGET_GENERATION] = 2005 periph->path->bus->generation; 2006 cdm->pos.cookie.device = periph->path->device; 2007 cdm->pos.generations[CAM_DEV_GENERATION] = 2008 periph->path->target->generation; 2009 cdm->pos.cookie.periph = periph; 2010 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2011 periph->path->device->generation; 2012 cdm->status = CAM_DEV_MATCH_MORE; 2013 return(0); 2014 } 2015 2016 j = cdm->num_matches; 2017 cdm->num_matches++; 2018 cdm->matches[j].type = DEV_MATCH_PERIPH; 2019 cdm->matches[j].result.periph_result.path_id = 2020 periph->path->bus->path_id; 2021 cdm->matches[j].result.periph_result.target_id = 2022 periph->path->target->target_id; 2023 cdm->matches[j].result.periph_result.target_lun = 2024 periph->path->device->lun_id; 2025 cdm->matches[j].result.periph_result.unit_number = 2026 periph->unit_number; 2027 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2028 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2029 periph->periph_name, l); 2030 } 2031 2032 return(1); 2033 } 2034 2035 static int 2036 xptedtmatch(struct ccb_dev_match *cdm) 2037 { 2038 struct cam_eb *bus; 2039 int ret; 2040 2041 cdm->num_matches = 0; 2042 2043 /* 2044 * Check the bus list generation. If it has changed, the user 2045 * needs to reset everything and start over. 2046 */ 2047 xpt_lock_buses(); 2048 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2049 && (cdm->pos.cookie.bus != NULL)) { 2050 if (cdm->pos.generations[CAM_BUS_GENERATION] != 2051 xsoftc.bus_generation) { 2052 xpt_unlock_buses(); 2053 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2054 return(0); 2055 } 2056 bus = (struct cam_eb *)cdm->pos.cookie.bus; 2057 bus->refcount++; 2058 } else 2059 bus = NULL; 2060 xpt_unlock_buses(); 2061 2062 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 2063 2064 /* 2065 * If we get back 0, that means that we had to stop before fully 2066 * traversing the EDT. It also means that one of the subroutines 2067 * has set the status field to the proper value. If we get back 1, 2068 * we've fully traversed the EDT and copied out any matching entries. 2069 */ 2070 if (ret == 1) 2071 cdm->status = CAM_DEV_MATCH_LAST; 2072 2073 return(ret); 2074 } 2075 2076 static int 2077 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2078 { 2079 struct cam_periph *periph; 2080 struct ccb_dev_match *cdm; 2081 2082 cdm = (struct ccb_dev_match *)arg; 2083 2084 xpt_lock_buses(); 2085 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2086 && (cdm->pos.cookie.pdrv == pdrv) 2087 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2088 && (cdm->pos.cookie.periph != NULL)) { 2089 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2090 (*pdrv)->generation) { 2091 xpt_unlock_buses(); 2092 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2093 return(0); 2094 } 2095 periph = (struct cam_periph *)cdm->pos.cookie.periph; 2096 periph->refcount++; 2097 } else 2098 periph = NULL; 2099 xpt_unlock_buses(); 2100 2101 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 2102 } 2103 2104 static int 2105 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2106 { 2107 struct ccb_dev_match *cdm; 2108 dev_match_ret retval; 2109 2110 cdm = (struct ccb_dev_match *)arg; 2111 2112 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2113 2114 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2115 cdm->status = CAM_DEV_MATCH_ERROR; 2116 return(0); 2117 } 2118 2119 /* 2120 * If the copy flag is set, copy this peripheral out. 2121 */ 2122 if (retval & DM_RET_COPY) { 2123 int spaceleft, j; 2124 size_t l; 2125 2126 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2127 sizeof(struct dev_match_result)); 2128 2129 /* 2130 * If we don't have enough space to put in another 2131 * match result, save our position and tell the 2132 * user there are more devices to check. 2133 */ 2134 if (spaceleft < sizeof(struct dev_match_result)) { 2135 struct periph_driver **pdrv; 2136 2137 pdrv = NULL; 2138 bzero(&cdm->pos, sizeof(cdm->pos)); 2139 cdm->pos.position_type = 2140 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2141 CAM_DEV_POS_PERIPH; 2142 2143 /* 2144 * This may look a bit non-sensical, but it is 2145 * actually quite logical. There are very few 2146 * peripheral drivers, and bloating every peripheral 2147 * structure with a pointer back to its parent 2148 * peripheral driver linker set entry would cost 2149 * more in the long run than doing this quick lookup. 2150 */ 2151 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2152 if (strcmp((*pdrv)->driver_name, 2153 periph->periph_name) == 0) 2154 break; 2155 } 2156 2157 if (*pdrv == NULL) { 2158 cdm->status = CAM_DEV_MATCH_ERROR; 2159 return(0); 2160 } 2161 2162 cdm->pos.cookie.pdrv = pdrv; 2163 /* 2164 * The periph generation slot does double duty, as 2165 * does the periph pointer slot. They are used for 2166 * both edt and pdrv lookups and positioning. 2167 */ 2168 cdm->pos.cookie.periph = periph; 2169 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2170 (*pdrv)->generation; 2171 cdm->status = CAM_DEV_MATCH_MORE; 2172 return(0); 2173 } 2174 2175 j = cdm->num_matches; 2176 cdm->num_matches++; 2177 cdm->matches[j].type = DEV_MATCH_PERIPH; 2178 cdm->matches[j].result.periph_result.path_id = 2179 periph->path->bus->path_id; 2180 2181 /* 2182 * The transport layer peripheral doesn't have a target or 2183 * lun. 2184 */ 2185 if (periph->path->target) 2186 cdm->matches[j].result.periph_result.target_id = 2187 periph->path->target->target_id; 2188 else 2189 cdm->matches[j].result.periph_result.target_id = 2190 CAM_TARGET_WILDCARD; 2191 2192 if (periph->path->device) 2193 cdm->matches[j].result.periph_result.target_lun = 2194 periph->path->device->lun_id; 2195 else 2196 cdm->matches[j].result.periph_result.target_lun = 2197 CAM_LUN_WILDCARD; 2198 2199 cdm->matches[j].result.periph_result.unit_number = 2200 periph->unit_number; 2201 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2202 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2203 periph->periph_name, l); 2204 } 2205 2206 return(1); 2207 } 2208 2209 static int 2210 xptperiphlistmatch(struct ccb_dev_match *cdm) 2211 { 2212 int ret; 2213 2214 cdm->num_matches = 0; 2215 2216 /* 2217 * At this point in the edt traversal function, we check the bus 2218 * list generation to make sure that no buses have been added or 2219 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2220 * For the peripheral driver list traversal function, however, we 2221 * don't have to worry about new peripheral driver types coming or 2222 * going; they're in a linker set, and therefore can't change 2223 * without a recompile. 2224 */ 2225 2226 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2227 && (cdm->pos.cookie.pdrv != NULL)) 2228 ret = xptpdrvtraverse( 2229 (struct periph_driver **)cdm->pos.cookie.pdrv, 2230 xptplistpdrvfunc, cdm); 2231 else 2232 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2233 2234 /* 2235 * If we get back 0, that means that we had to stop before fully 2236 * traversing the peripheral driver tree. It also means that one of 2237 * the subroutines has set the status field to the proper value. If 2238 * we get back 1, we've fully traversed the EDT and copied out any 2239 * matching entries. 2240 */ 2241 if (ret == 1) 2242 cdm->status = CAM_DEV_MATCH_LAST; 2243 2244 return(ret); 2245 } 2246 2247 static int 2248 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2249 { 2250 struct cam_eb *bus, *next_bus; 2251 int retval; 2252 2253 retval = 1; 2254 if (start_bus) 2255 bus = start_bus; 2256 else { 2257 xpt_lock_buses(); 2258 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2259 if (bus == NULL) { 2260 xpt_unlock_buses(); 2261 return (retval); 2262 } 2263 bus->refcount++; 2264 xpt_unlock_buses(); 2265 } 2266 for (; bus != NULL; bus = next_bus) { 2267 retval = tr_func(bus, arg); 2268 if (retval == 0) { 2269 xpt_release_bus(bus); 2270 break; 2271 } 2272 xpt_lock_buses(); 2273 next_bus = TAILQ_NEXT(bus, links); 2274 if (next_bus) 2275 next_bus->refcount++; 2276 xpt_unlock_buses(); 2277 xpt_release_bus(bus); 2278 } 2279 return(retval); 2280 } 2281 2282 static int 2283 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2284 xpt_targetfunc_t *tr_func, void *arg) 2285 { 2286 struct cam_et *target, *next_target; 2287 int retval; 2288 2289 retval = 1; 2290 if (start_target) 2291 target = start_target; 2292 else { 2293 mtx_lock(&bus->eb_mtx); 2294 target = TAILQ_FIRST(&bus->et_entries); 2295 if (target == NULL) { 2296 mtx_unlock(&bus->eb_mtx); 2297 return (retval); 2298 } 2299 target->refcount++; 2300 mtx_unlock(&bus->eb_mtx); 2301 } 2302 for (; target != NULL; target = next_target) { 2303 retval = tr_func(target, arg); 2304 if (retval == 0) { 2305 xpt_release_target(target); 2306 break; 2307 } 2308 mtx_lock(&bus->eb_mtx); 2309 next_target = TAILQ_NEXT(target, links); 2310 if (next_target) 2311 next_target->refcount++; 2312 mtx_unlock(&bus->eb_mtx); 2313 xpt_release_target(target); 2314 } 2315 return(retval); 2316 } 2317 2318 static int 2319 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2320 xpt_devicefunc_t *tr_func, void *arg) 2321 { 2322 struct cam_eb *bus; 2323 struct cam_ed *device, *next_device; 2324 int retval; 2325 2326 retval = 1; 2327 bus = target->bus; 2328 if (start_device) 2329 device = start_device; 2330 else { 2331 mtx_lock(&bus->eb_mtx); 2332 device = TAILQ_FIRST(&target->ed_entries); 2333 if (device == NULL) { 2334 mtx_unlock(&bus->eb_mtx); 2335 return (retval); 2336 } 2337 device->refcount++; 2338 mtx_unlock(&bus->eb_mtx); 2339 } 2340 for (; device != NULL; device = next_device) { 2341 mtx_lock(&device->device_mtx); 2342 retval = tr_func(device, arg); 2343 mtx_unlock(&device->device_mtx); 2344 if (retval == 0) { 2345 xpt_release_device(device); 2346 break; 2347 } 2348 mtx_lock(&bus->eb_mtx); 2349 next_device = TAILQ_NEXT(device, links); 2350 if (next_device) 2351 next_device->refcount++; 2352 mtx_unlock(&bus->eb_mtx); 2353 xpt_release_device(device); 2354 } 2355 return(retval); 2356 } 2357 2358 static int 2359 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2360 xpt_periphfunc_t *tr_func, void *arg) 2361 { 2362 struct cam_eb *bus; 2363 struct cam_periph *periph, *next_periph; 2364 int retval; 2365 2366 retval = 1; 2367 2368 bus = device->target->bus; 2369 if (start_periph) 2370 periph = start_periph; 2371 else { 2372 xpt_lock_buses(); 2373 mtx_lock(&bus->eb_mtx); 2374 periph = SLIST_FIRST(&device->periphs); 2375 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2376 periph = SLIST_NEXT(periph, periph_links); 2377 if (periph == NULL) { 2378 mtx_unlock(&bus->eb_mtx); 2379 xpt_unlock_buses(); 2380 return (retval); 2381 } 2382 periph->refcount++; 2383 mtx_unlock(&bus->eb_mtx); 2384 xpt_unlock_buses(); 2385 } 2386 for (; periph != NULL; periph = next_periph) { 2387 retval = tr_func(periph, arg); 2388 if (retval == 0) { 2389 cam_periph_release_locked(periph); 2390 break; 2391 } 2392 xpt_lock_buses(); 2393 mtx_lock(&bus->eb_mtx); 2394 next_periph = SLIST_NEXT(periph, periph_links); 2395 while (next_periph != NULL && 2396 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2397 next_periph = SLIST_NEXT(next_periph, periph_links); 2398 if (next_periph) 2399 next_periph->refcount++; 2400 mtx_unlock(&bus->eb_mtx); 2401 xpt_unlock_buses(); 2402 cam_periph_release_locked(periph); 2403 } 2404 return(retval); 2405 } 2406 2407 static int 2408 xptpdrvtraverse(struct periph_driver **start_pdrv, 2409 xpt_pdrvfunc_t *tr_func, void *arg) 2410 { 2411 struct periph_driver **pdrv; 2412 int retval; 2413 2414 retval = 1; 2415 2416 /* 2417 * We don't traverse the peripheral driver list like we do the 2418 * other lists, because it is a linker set, and therefore cannot be 2419 * changed during runtime. If the peripheral driver list is ever 2420 * re-done to be something other than a linker set (i.e. it can 2421 * change while the system is running), the list traversal should 2422 * be modified to work like the other traversal functions. 2423 */ 2424 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2425 *pdrv != NULL; pdrv++) { 2426 retval = tr_func(pdrv, arg); 2427 2428 if (retval == 0) 2429 return(retval); 2430 } 2431 2432 return(retval); 2433 } 2434 2435 static int 2436 xptpdperiphtraverse(struct periph_driver **pdrv, 2437 struct cam_periph *start_periph, 2438 xpt_periphfunc_t *tr_func, void *arg) 2439 { 2440 struct cam_periph *periph, *next_periph; 2441 int retval; 2442 2443 retval = 1; 2444 2445 if (start_periph) 2446 periph = start_periph; 2447 else { 2448 xpt_lock_buses(); 2449 periph = TAILQ_FIRST(&(*pdrv)->units); 2450 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2451 periph = TAILQ_NEXT(periph, unit_links); 2452 if (periph == NULL) { 2453 xpt_unlock_buses(); 2454 return (retval); 2455 } 2456 periph->refcount++; 2457 xpt_unlock_buses(); 2458 } 2459 for (; periph != NULL; periph = next_periph) { 2460 cam_periph_lock(periph); 2461 retval = tr_func(periph, arg); 2462 cam_periph_unlock(periph); 2463 if (retval == 0) { 2464 cam_periph_release(periph); 2465 break; 2466 } 2467 xpt_lock_buses(); 2468 next_periph = TAILQ_NEXT(periph, unit_links); 2469 while (next_periph != NULL && 2470 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2471 next_periph = TAILQ_NEXT(next_periph, unit_links); 2472 if (next_periph) 2473 next_periph->refcount++; 2474 xpt_unlock_buses(); 2475 cam_periph_release(periph); 2476 } 2477 return(retval); 2478 } 2479 2480 static int 2481 xptdefbusfunc(struct cam_eb *bus, void *arg) 2482 { 2483 struct xpt_traverse_config *tr_config; 2484 2485 tr_config = (struct xpt_traverse_config *)arg; 2486 2487 if (tr_config->depth == XPT_DEPTH_BUS) { 2488 xpt_busfunc_t *tr_func; 2489 2490 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2491 2492 return(tr_func(bus, tr_config->tr_arg)); 2493 } else 2494 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2495 } 2496 2497 static int 2498 xptdeftargetfunc(struct cam_et *target, void *arg) 2499 { 2500 struct xpt_traverse_config *tr_config; 2501 2502 tr_config = (struct xpt_traverse_config *)arg; 2503 2504 if (tr_config->depth == XPT_DEPTH_TARGET) { 2505 xpt_targetfunc_t *tr_func; 2506 2507 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2508 2509 return(tr_func(target, tr_config->tr_arg)); 2510 } else 2511 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2512 } 2513 2514 static int 2515 xptdefdevicefunc(struct cam_ed *device, void *arg) 2516 { 2517 struct xpt_traverse_config *tr_config; 2518 2519 tr_config = (struct xpt_traverse_config *)arg; 2520 2521 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2522 xpt_devicefunc_t *tr_func; 2523 2524 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2525 2526 return(tr_func(device, tr_config->tr_arg)); 2527 } else 2528 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2529 } 2530 2531 static int 2532 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2533 { 2534 struct xpt_traverse_config *tr_config; 2535 xpt_periphfunc_t *tr_func; 2536 2537 tr_config = (struct xpt_traverse_config *)arg; 2538 2539 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2540 2541 /* 2542 * Unlike the other default functions, we don't check for depth 2543 * here. The peripheral driver level is the last level in the EDT, 2544 * so if we're here, we should execute the function in question. 2545 */ 2546 return(tr_func(periph, tr_config->tr_arg)); 2547 } 2548 2549 /* 2550 * Execute the given function for every bus in the EDT. 2551 */ 2552 static int 2553 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2554 { 2555 struct xpt_traverse_config tr_config; 2556 2557 tr_config.depth = XPT_DEPTH_BUS; 2558 tr_config.tr_func = tr_func; 2559 tr_config.tr_arg = arg; 2560 2561 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2562 } 2563 2564 /* 2565 * Execute the given function for every device in the EDT. 2566 */ 2567 static int 2568 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2569 { 2570 struct xpt_traverse_config tr_config; 2571 2572 tr_config.depth = XPT_DEPTH_DEVICE; 2573 tr_config.tr_func = tr_func; 2574 tr_config.tr_arg = arg; 2575 2576 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2577 } 2578 2579 static int 2580 xptsetasyncfunc(struct cam_ed *device, void *arg) 2581 { 2582 struct cam_path path; 2583 struct ccb_getdev cgd; 2584 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2585 2586 /* 2587 * Don't report unconfigured devices (Wildcard devs, 2588 * devices only for target mode, device instances 2589 * that have been invalidated but are waiting for 2590 * their last reference count to be released). 2591 */ 2592 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2593 return (1); 2594 2595 xpt_compile_path(&path, 2596 NULL, 2597 device->target->bus->path_id, 2598 device->target->target_id, 2599 device->lun_id); 2600 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2601 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2602 xpt_action((union ccb *)&cgd); 2603 csa->callback(csa->callback_arg, 2604 AC_FOUND_DEVICE, 2605 &path, &cgd); 2606 xpt_release_path(&path); 2607 2608 return(1); 2609 } 2610 2611 static int 2612 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2613 { 2614 struct cam_path path; 2615 struct ccb_pathinq cpi; 2616 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2617 2618 xpt_compile_path(&path, /*periph*/NULL, 2619 bus->path_id, 2620 CAM_TARGET_WILDCARD, 2621 CAM_LUN_WILDCARD); 2622 xpt_path_lock(&path); 2623 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2624 cpi.ccb_h.func_code = XPT_PATH_INQ; 2625 xpt_action((union ccb *)&cpi); 2626 csa->callback(csa->callback_arg, 2627 AC_PATH_REGISTERED, 2628 &path, &cpi); 2629 xpt_path_unlock(&path); 2630 xpt_release_path(&path); 2631 2632 return(1); 2633 } 2634 2635 void 2636 xpt_action(union ccb *start_ccb) 2637 { 2638 2639 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, 2640 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code, 2641 xpt_action_name(start_ccb->ccb_h.func_code))); 2642 2643 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2644 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb); 2645 } 2646 2647 void 2648 xpt_action_default(union ccb *start_ccb) 2649 { 2650 struct cam_path *path; 2651 struct cam_sim *sim; 2652 struct mtx *mtx; 2653 2654 path = start_ccb->ccb_h.path; 2655 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2656 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code, 2657 xpt_action_name(start_ccb->ccb_h.func_code))); 2658 2659 switch (start_ccb->ccb_h.func_code) { 2660 case XPT_SCSI_IO: 2661 { 2662 struct cam_ed *device; 2663 2664 /* 2665 * For the sake of compatibility with SCSI-1 2666 * devices that may not understand the identify 2667 * message, we include lun information in the 2668 * second byte of all commands. SCSI-1 specifies 2669 * that luns are a 3 bit value and reserves only 3 2670 * bits for lun information in the CDB. Later 2671 * revisions of the SCSI spec allow for more than 8 2672 * luns, but have deprecated lun information in the 2673 * CDB. So, if the lun won't fit, we must omit. 2674 * 2675 * Also be aware that during initial probing for devices, 2676 * the inquiry information is unknown but initialized to 0. 2677 * This means that this code will be exercised while probing 2678 * devices with an ANSI revision greater than 2. 2679 */ 2680 device = path->device; 2681 if (device->protocol_version <= SCSI_REV_2 2682 && start_ccb->ccb_h.target_lun < 8 2683 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2684 2685 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2686 start_ccb->ccb_h.target_lun << 5; 2687 } 2688 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2689 } 2690 /* FALLTHROUGH */ 2691 case XPT_TARGET_IO: 2692 case XPT_CONT_TARGET_IO: 2693 start_ccb->csio.sense_resid = 0; 2694 start_ccb->csio.resid = 0; 2695 /* FALLTHROUGH */ 2696 case XPT_ATA_IO: 2697 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2698 start_ccb->ataio.resid = 0; 2699 /* FALLTHROUGH */ 2700 case XPT_NVME_IO: 2701 /* FALLTHROUGH */ 2702 case XPT_NVME_ADMIN: 2703 /* FALLTHROUGH */ 2704 case XPT_MMC_IO: 2705 /* XXX just like nmve_io? */ 2706 case XPT_RESET_DEV: 2707 case XPT_ENG_EXEC: 2708 case XPT_SMP_IO: 2709 { 2710 struct cam_devq *devq; 2711 2712 devq = path->bus->sim->devq; 2713 mtx_lock(&devq->send_mtx); 2714 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2715 if (xpt_schedule_devq(devq, path->device) != 0) 2716 xpt_run_devq(devq); 2717 mtx_unlock(&devq->send_mtx); 2718 break; 2719 } 2720 case XPT_CALC_GEOMETRY: 2721 /* Filter out garbage */ 2722 if (start_ccb->ccg.block_size == 0 2723 || start_ccb->ccg.volume_size == 0) { 2724 start_ccb->ccg.cylinders = 0; 2725 start_ccb->ccg.heads = 0; 2726 start_ccb->ccg.secs_per_track = 0; 2727 start_ccb->ccb_h.status = CAM_REQ_CMP; 2728 break; 2729 } 2730 #if defined(__sparc64__) 2731 /* 2732 * For sparc64, we may need adjust the geometry of large 2733 * disks in order to fit the limitations of the 16-bit 2734 * fields of the VTOC8 disk label. 2735 */ 2736 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2737 start_ccb->ccb_h.status = CAM_REQ_CMP; 2738 break; 2739 } 2740 #endif 2741 goto call_sim; 2742 case XPT_ABORT: 2743 { 2744 union ccb* abort_ccb; 2745 2746 abort_ccb = start_ccb->cab.abort_ccb; 2747 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2748 struct cam_ed *device; 2749 struct cam_devq *devq; 2750 2751 device = abort_ccb->ccb_h.path->device; 2752 devq = device->sim->devq; 2753 2754 mtx_lock(&devq->send_mtx); 2755 if (abort_ccb->ccb_h.pinfo.index > 0) { 2756 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb); 2757 abort_ccb->ccb_h.status = 2758 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2759 xpt_freeze_devq_device(device, 1); 2760 mtx_unlock(&devq->send_mtx); 2761 xpt_done(abort_ccb); 2762 start_ccb->ccb_h.status = CAM_REQ_CMP; 2763 break; 2764 } 2765 mtx_unlock(&devq->send_mtx); 2766 2767 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2768 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2769 /* 2770 * We've caught this ccb en route to 2771 * the SIM. Flag it for abort and the 2772 * SIM will do so just before starting 2773 * real work on the CCB. 2774 */ 2775 abort_ccb->ccb_h.status = 2776 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2777 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2778 start_ccb->ccb_h.status = CAM_REQ_CMP; 2779 break; 2780 } 2781 } 2782 if (XPT_FC_IS_QUEUED(abort_ccb) 2783 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2784 /* 2785 * It's already completed but waiting 2786 * for our SWI to get to it. 2787 */ 2788 start_ccb->ccb_h.status = CAM_UA_ABORT; 2789 break; 2790 } 2791 /* 2792 * If we weren't able to take care of the abort request 2793 * in the XPT, pass the request down to the SIM for processing. 2794 */ 2795 } 2796 /* FALLTHROUGH */ 2797 case XPT_ACCEPT_TARGET_IO: 2798 case XPT_EN_LUN: 2799 case XPT_IMMED_NOTIFY: 2800 case XPT_NOTIFY_ACK: 2801 case XPT_RESET_BUS: 2802 case XPT_IMMEDIATE_NOTIFY: 2803 case XPT_NOTIFY_ACKNOWLEDGE: 2804 case XPT_GET_SIM_KNOB_OLD: 2805 case XPT_GET_SIM_KNOB: 2806 case XPT_SET_SIM_KNOB: 2807 case XPT_GET_TRAN_SETTINGS: 2808 case XPT_SET_TRAN_SETTINGS: 2809 case XPT_PATH_INQ: 2810 call_sim: 2811 sim = path->bus->sim; 2812 mtx = sim->mtx; 2813 if (mtx && !mtx_owned(mtx)) 2814 mtx_lock(mtx); 2815 else 2816 mtx = NULL; 2817 2818 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2819 ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code)); 2820 (*(sim->sim_action))(sim, start_ccb); 2821 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2822 ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status)); 2823 if (mtx) 2824 mtx_unlock(mtx); 2825 break; 2826 case XPT_PATH_STATS: 2827 start_ccb->cpis.last_reset = path->bus->last_reset; 2828 start_ccb->ccb_h.status = CAM_REQ_CMP; 2829 break; 2830 case XPT_GDEV_TYPE: 2831 { 2832 struct cam_ed *dev; 2833 2834 dev = path->device; 2835 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2836 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2837 } else { 2838 struct ccb_getdev *cgd; 2839 2840 cgd = &start_ccb->cgd; 2841 cgd->protocol = dev->protocol; 2842 cgd->inq_data = dev->inq_data; 2843 cgd->ident_data = dev->ident_data; 2844 cgd->inq_flags = dev->inq_flags; 2845 cgd->ccb_h.status = CAM_REQ_CMP; 2846 cgd->serial_num_len = dev->serial_num_len; 2847 if ((dev->serial_num_len > 0) 2848 && (dev->serial_num != NULL)) 2849 bcopy(dev->serial_num, cgd->serial_num, 2850 dev->serial_num_len); 2851 } 2852 break; 2853 } 2854 case XPT_GDEV_STATS: 2855 { 2856 struct ccb_getdevstats *cgds = &start_ccb->cgds; 2857 struct cam_ed *dev = path->device; 2858 struct cam_eb *bus = path->bus; 2859 struct cam_et *tar = path->target; 2860 struct cam_devq *devq = bus->sim->devq; 2861 2862 mtx_lock(&devq->send_mtx); 2863 cgds->dev_openings = dev->ccbq.dev_openings; 2864 cgds->dev_active = dev->ccbq.dev_active; 2865 cgds->allocated = dev->ccbq.allocated; 2866 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2867 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued; 2868 cgds->last_reset = tar->last_reset; 2869 cgds->maxtags = dev->maxtags; 2870 cgds->mintags = dev->mintags; 2871 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2872 cgds->last_reset = bus->last_reset; 2873 mtx_unlock(&devq->send_mtx); 2874 cgds->ccb_h.status = CAM_REQ_CMP; 2875 break; 2876 } 2877 case XPT_GDEVLIST: 2878 { 2879 struct cam_periph *nperiph; 2880 struct periph_list *periph_head; 2881 struct ccb_getdevlist *cgdl; 2882 u_int i; 2883 struct cam_ed *device; 2884 int found; 2885 2886 2887 found = 0; 2888 2889 /* 2890 * Don't want anyone mucking with our data. 2891 */ 2892 device = path->device; 2893 periph_head = &device->periphs; 2894 cgdl = &start_ccb->cgdl; 2895 2896 /* 2897 * Check and see if the list has changed since the user 2898 * last requested a list member. If so, tell them that the 2899 * list has changed, and therefore they need to start over 2900 * from the beginning. 2901 */ 2902 if ((cgdl->index != 0) && 2903 (cgdl->generation != device->generation)) { 2904 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2905 break; 2906 } 2907 2908 /* 2909 * Traverse the list of peripherals and attempt to find 2910 * the requested peripheral. 2911 */ 2912 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2913 (nperiph != NULL) && (i <= cgdl->index); 2914 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2915 if (i == cgdl->index) { 2916 strlcpy(cgdl->periph_name, 2917 nperiph->periph_name, 2918 sizeof(cgdl->periph_name)); 2919 cgdl->unit_number = nperiph->unit_number; 2920 found = 1; 2921 } 2922 } 2923 if (found == 0) { 2924 cgdl->status = CAM_GDEVLIST_ERROR; 2925 break; 2926 } 2927 2928 if (nperiph == NULL) 2929 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2930 else 2931 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2932 2933 cgdl->index++; 2934 cgdl->generation = device->generation; 2935 2936 cgdl->ccb_h.status = CAM_REQ_CMP; 2937 break; 2938 } 2939 case XPT_DEV_MATCH: 2940 { 2941 dev_pos_type position_type; 2942 struct ccb_dev_match *cdm; 2943 2944 cdm = &start_ccb->cdm; 2945 2946 /* 2947 * There are two ways of getting at information in the EDT. 2948 * The first way is via the primary EDT tree. It starts 2949 * with a list of buses, then a list of targets on a bus, 2950 * then devices/luns on a target, and then peripherals on a 2951 * device/lun. The "other" way is by the peripheral driver 2952 * lists. The peripheral driver lists are organized by 2953 * peripheral driver. (obviously) So it makes sense to 2954 * use the peripheral driver list if the user is looking 2955 * for something like "da1", or all "da" devices. If the 2956 * user is looking for something on a particular bus/target 2957 * or lun, it's generally better to go through the EDT tree. 2958 */ 2959 2960 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2961 position_type = cdm->pos.position_type; 2962 else { 2963 u_int i; 2964 2965 position_type = CAM_DEV_POS_NONE; 2966 2967 for (i = 0; i < cdm->num_patterns; i++) { 2968 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2969 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2970 position_type = CAM_DEV_POS_EDT; 2971 break; 2972 } 2973 } 2974 2975 if (cdm->num_patterns == 0) 2976 position_type = CAM_DEV_POS_EDT; 2977 else if (position_type == CAM_DEV_POS_NONE) 2978 position_type = CAM_DEV_POS_PDRV; 2979 } 2980 2981 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2982 case CAM_DEV_POS_EDT: 2983 xptedtmatch(cdm); 2984 break; 2985 case CAM_DEV_POS_PDRV: 2986 xptperiphlistmatch(cdm); 2987 break; 2988 default: 2989 cdm->status = CAM_DEV_MATCH_ERROR; 2990 break; 2991 } 2992 2993 if (cdm->status == CAM_DEV_MATCH_ERROR) 2994 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2995 else 2996 start_ccb->ccb_h.status = CAM_REQ_CMP; 2997 2998 break; 2999 } 3000 case XPT_SASYNC_CB: 3001 { 3002 struct ccb_setasync *csa; 3003 struct async_node *cur_entry; 3004 struct async_list *async_head; 3005 u_int32_t added; 3006 3007 csa = &start_ccb->csa; 3008 added = csa->event_enable; 3009 async_head = &path->device->asyncs; 3010 3011 /* 3012 * If there is already an entry for us, simply 3013 * update it. 3014 */ 3015 cur_entry = SLIST_FIRST(async_head); 3016 while (cur_entry != NULL) { 3017 if ((cur_entry->callback_arg == csa->callback_arg) 3018 && (cur_entry->callback == csa->callback)) 3019 break; 3020 cur_entry = SLIST_NEXT(cur_entry, links); 3021 } 3022 3023 if (cur_entry != NULL) { 3024 /* 3025 * If the request has no flags set, 3026 * remove the entry. 3027 */ 3028 added &= ~cur_entry->event_enable; 3029 if (csa->event_enable == 0) { 3030 SLIST_REMOVE(async_head, cur_entry, 3031 async_node, links); 3032 xpt_release_device(path->device); 3033 free(cur_entry, M_CAMXPT); 3034 } else { 3035 cur_entry->event_enable = csa->event_enable; 3036 } 3037 csa->event_enable = added; 3038 } else { 3039 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 3040 M_NOWAIT); 3041 if (cur_entry == NULL) { 3042 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 3043 break; 3044 } 3045 cur_entry->event_enable = csa->event_enable; 3046 cur_entry->event_lock = (path->bus->sim->mtx && 3047 mtx_owned(path->bus->sim->mtx)) ? 1 : 0; 3048 cur_entry->callback_arg = csa->callback_arg; 3049 cur_entry->callback = csa->callback; 3050 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3051 xpt_acquire_device(path->device); 3052 } 3053 start_ccb->ccb_h.status = CAM_REQ_CMP; 3054 break; 3055 } 3056 case XPT_REL_SIMQ: 3057 { 3058 struct ccb_relsim *crs; 3059 struct cam_ed *dev; 3060 3061 crs = &start_ccb->crs; 3062 dev = path->device; 3063 if (dev == NULL) { 3064 3065 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3066 break; 3067 } 3068 3069 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3070 3071 /* Don't ever go below one opening */ 3072 if (crs->openings > 0) { 3073 xpt_dev_ccbq_resize(path, crs->openings); 3074 if (bootverbose) { 3075 xpt_print(path, 3076 "number of openings is now %d\n", 3077 crs->openings); 3078 } 3079 } 3080 } 3081 3082 mtx_lock(&dev->sim->devq->send_mtx); 3083 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3084 3085 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3086 3087 /* 3088 * Just extend the old timeout and decrement 3089 * the freeze count so that a single timeout 3090 * is sufficient for releasing the queue. 3091 */ 3092 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3093 callout_stop(&dev->callout); 3094 } else { 3095 3096 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3097 } 3098 3099 callout_reset_sbt(&dev->callout, 3100 SBT_1MS * crs->release_timeout, 0, 3101 xpt_release_devq_timeout, dev, 0); 3102 3103 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3104 3105 } 3106 3107 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3108 3109 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3110 /* 3111 * Decrement the freeze count so that a single 3112 * completion is still sufficient to unfreeze 3113 * the queue. 3114 */ 3115 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3116 } else { 3117 3118 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3119 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3120 } 3121 } 3122 3123 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3124 3125 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3126 || (dev->ccbq.dev_active == 0)) { 3127 3128 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3129 } else { 3130 3131 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3132 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3133 } 3134 } 3135 mtx_unlock(&dev->sim->devq->send_mtx); 3136 3137 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 3138 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 3139 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 3140 start_ccb->ccb_h.status = CAM_REQ_CMP; 3141 break; 3142 } 3143 case XPT_DEBUG: { 3144 struct cam_path *oldpath; 3145 3146 /* Check that all request bits are supported. */ 3147 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 3148 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3149 break; 3150 } 3151 3152 cam_dflags = CAM_DEBUG_NONE; 3153 if (cam_dpath != NULL) { 3154 oldpath = cam_dpath; 3155 cam_dpath = NULL; 3156 xpt_free_path(oldpath); 3157 } 3158 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 3159 if (xpt_create_path(&cam_dpath, NULL, 3160 start_ccb->ccb_h.path_id, 3161 start_ccb->ccb_h.target_id, 3162 start_ccb->ccb_h.target_lun) != 3163 CAM_REQ_CMP) { 3164 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3165 } else { 3166 cam_dflags = start_ccb->cdbg.flags; 3167 start_ccb->ccb_h.status = CAM_REQ_CMP; 3168 xpt_print(cam_dpath, "debugging flags now %x\n", 3169 cam_dflags); 3170 } 3171 } else 3172 start_ccb->ccb_h.status = CAM_REQ_CMP; 3173 break; 3174 } 3175 case XPT_NOOP: 3176 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3177 xpt_freeze_devq(path, 1); 3178 start_ccb->ccb_h.status = CAM_REQ_CMP; 3179 break; 3180 case XPT_REPROBE_LUN: 3181 xpt_async(AC_INQ_CHANGED, path, NULL); 3182 start_ccb->ccb_h.status = CAM_REQ_CMP; 3183 xpt_done(start_ccb); 3184 break; 3185 default: 3186 case XPT_SDEV_TYPE: 3187 case XPT_TERM_IO: 3188 case XPT_ENG_INQ: 3189 /* XXX Implement */ 3190 xpt_print(start_ccb->ccb_h.path, 3191 "%s: CCB type %#x %s not supported\n", __func__, 3192 start_ccb->ccb_h.func_code, 3193 xpt_action_name(start_ccb->ccb_h.func_code)); 3194 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3195 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3196 xpt_done(start_ccb); 3197 } 3198 break; 3199 } 3200 CAM_DEBUG(path, CAM_DEBUG_TRACE, 3201 ("xpt_action_default: func= %#x %s status %#x\n", 3202 start_ccb->ccb_h.func_code, 3203 xpt_action_name(start_ccb->ccb_h.func_code), 3204 start_ccb->ccb_h.status)); 3205 } 3206 3207 void 3208 xpt_polled_action(union ccb *start_ccb) 3209 { 3210 u_int32_t timeout; 3211 struct cam_sim *sim; 3212 struct cam_devq *devq; 3213 struct cam_ed *dev; 3214 struct mtx *mtx; 3215 3216 timeout = start_ccb->ccb_h.timeout * 10; 3217 sim = start_ccb->ccb_h.path->bus->sim; 3218 devq = sim->devq; 3219 mtx = sim->mtx; 3220 dev = start_ccb->ccb_h.path->device; 3221 3222 mtx_unlock(&dev->device_mtx); 3223 3224 /* 3225 * Steal an opening so that no other queued requests 3226 * can get it before us while we simulate interrupts. 3227 */ 3228 mtx_lock(&devq->send_mtx); 3229 dev->ccbq.dev_openings--; 3230 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3231 (--timeout > 0)) { 3232 mtx_unlock(&devq->send_mtx); 3233 DELAY(100); 3234 if (mtx) 3235 mtx_lock(mtx); 3236 (*(sim->sim_poll))(sim); 3237 if (mtx) 3238 mtx_unlock(mtx); 3239 camisr_runqueue(); 3240 mtx_lock(&devq->send_mtx); 3241 } 3242 dev->ccbq.dev_openings++; 3243 mtx_unlock(&devq->send_mtx); 3244 3245 if (timeout != 0) { 3246 xpt_action(start_ccb); 3247 while(--timeout > 0) { 3248 if (mtx) 3249 mtx_lock(mtx); 3250 (*(sim->sim_poll))(sim); 3251 if (mtx) 3252 mtx_unlock(mtx); 3253 camisr_runqueue(); 3254 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3255 != CAM_REQ_INPROG) 3256 break; 3257 DELAY(100); 3258 } 3259 if (timeout == 0) { 3260 /* 3261 * XXX Is it worth adding a sim_timeout entry 3262 * point so we can attempt recovery? If 3263 * this is only used for dumps, I don't think 3264 * it is. 3265 */ 3266 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3267 } 3268 } else { 3269 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3270 } 3271 3272 mtx_lock(&dev->device_mtx); 3273 } 3274 3275 /* 3276 * Schedule a peripheral driver to receive a ccb when its 3277 * target device has space for more transactions. 3278 */ 3279 void 3280 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3281 { 3282 3283 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3284 cam_periph_assert(periph, MA_OWNED); 3285 if (new_priority < periph->scheduled_priority) { 3286 periph->scheduled_priority = new_priority; 3287 xpt_run_allocq(periph, 0); 3288 } 3289 } 3290 3291 3292 /* 3293 * Schedule a device to run on a given queue. 3294 * If the device was inserted as a new entry on the queue, 3295 * return 1 meaning the device queue should be run. If we 3296 * were already queued, implying someone else has already 3297 * started the queue, return 0 so the caller doesn't attempt 3298 * to run the queue. 3299 */ 3300 static int 3301 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3302 u_int32_t new_priority) 3303 { 3304 int retval; 3305 u_int32_t old_priority; 3306 3307 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3308 3309 old_priority = pinfo->priority; 3310 3311 /* 3312 * Are we already queued? 3313 */ 3314 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3315 /* Simply reorder based on new priority */ 3316 if (new_priority < old_priority) { 3317 camq_change_priority(queue, pinfo->index, 3318 new_priority); 3319 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3320 ("changed priority to %d\n", 3321 new_priority)); 3322 retval = 1; 3323 } else 3324 retval = 0; 3325 } else { 3326 /* New entry on the queue */ 3327 if (new_priority < old_priority) 3328 pinfo->priority = new_priority; 3329 3330 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3331 ("Inserting onto queue\n")); 3332 pinfo->generation = ++queue->generation; 3333 camq_insert(queue, pinfo); 3334 retval = 1; 3335 } 3336 return (retval); 3337 } 3338 3339 static void 3340 xpt_run_allocq_task(void *context, int pending) 3341 { 3342 struct cam_periph *periph = context; 3343 3344 cam_periph_lock(periph); 3345 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3346 xpt_run_allocq(periph, 1); 3347 cam_periph_unlock(periph); 3348 cam_periph_release(periph); 3349 } 3350 3351 static void 3352 xpt_run_allocq(struct cam_periph *periph, int sleep) 3353 { 3354 struct cam_ed *device; 3355 union ccb *ccb; 3356 uint32_t prio; 3357 3358 cam_periph_assert(periph, MA_OWNED); 3359 if (periph->periph_allocating) 3360 return; 3361 periph->periph_allocating = 1; 3362 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3363 device = periph->path->device; 3364 ccb = NULL; 3365 restart: 3366 while ((prio = min(periph->scheduled_priority, 3367 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3368 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3369 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3370 3371 if (ccb == NULL && 3372 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3373 if (sleep) { 3374 ccb = xpt_get_ccb(periph); 3375 goto restart; 3376 } 3377 if (periph->flags & CAM_PERIPH_RUN_TASK) 3378 break; 3379 cam_periph_doacquire(periph); 3380 periph->flags |= CAM_PERIPH_RUN_TASK; 3381 taskqueue_enqueue(xsoftc.xpt_taskq, 3382 &periph->periph_run_task); 3383 break; 3384 } 3385 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3386 if (prio == periph->immediate_priority) { 3387 periph->immediate_priority = CAM_PRIORITY_NONE; 3388 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3389 ("waking cam_periph_getccb()\n")); 3390 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3391 periph_links.sle); 3392 wakeup(&periph->ccb_list); 3393 } else { 3394 periph->scheduled_priority = CAM_PRIORITY_NONE; 3395 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3396 ("calling periph_start()\n")); 3397 periph->periph_start(periph, ccb); 3398 } 3399 ccb = NULL; 3400 } 3401 if (ccb != NULL) 3402 xpt_release_ccb(ccb); 3403 periph->periph_allocating = 0; 3404 } 3405 3406 static void 3407 xpt_run_devq(struct cam_devq *devq) 3408 { 3409 struct mtx *mtx; 3410 3411 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3412 3413 devq->send_queue.qfrozen_cnt++; 3414 while ((devq->send_queue.entries > 0) 3415 && (devq->send_openings > 0) 3416 && (devq->send_queue.qfrozen_cnt <= 1)) { 3417 struct cam_ed *device; 3418 union ccb *work_ccb; 3419 struct cam_sim *sim; 3420 struct xpt_proto *proto; 3421 3422 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3423 CAMQ_HEAD); 3424 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3425 ("running device %p\n", device)); 3426 3427 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3428 if (work_ccb == NULL) { 3429 printf("device on run queue with no ccbs???\n"); 3430 continue; 3431 } 3432 3433 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3434 3435 mtx_lock(&xsoftc.xpt_highpower_lock); 3436 if (xsoftc.num_highpower <= 0) { 3437 /* 3438 * We got a high power command, but we 3439 * don't have any available slots. Freeze 3440 * the device queue until we have a slot 3441 * available. 3442 */ 3443 xpt_freeze_devq_device(device, 1); 3444 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3445 highpowerq_entry); 3446 3447 mtx_unlock(&xsoftc.xpt_highpower_lock); 3448 continue; 3449 } else { 3450 /* 3451 * Consume a high power slot while 3452 * this ccb runs. 3453 */ 3454 xsoftc.num_highpower--; 3455 } 3456 mtx_unlock(&xsoftc.xpt_highpower_lock); 3457 } 3458 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3459 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3460 devq->send_openings--; 3461 devq->send_active++; 3462 xpt_schedule_devq(devq, device); 3463 mtx_unlock(&devq->send_mtx); 3464 3465 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3466 /* 3467 * The client wants to freeze the queue 3468 * after this CCB is sent. 3469 */ 3470 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3471 } 3472 3473 /* In Target mode, the peripheral driver knows best... */ 3474 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3475 if ((device->inq_flags & SID_CmdQue) != 0 3476 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3477 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3478 else 3479 /* 3480 * Clear this in case of a retried CCB that 3481 * failed due to a rejected tag. 3482 */ 3483 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3484 } 3485 3486 KASSERT(device == work_ccb->ccb_h.path->device, 3487 ("device (%p) / path->device (%p) mismatch", 3488 device, work_ccb->ccb_h.path->device)); 3489 proto = xpt_proto_find(device->protocol); 3490 if (proto && proto->ops->debug_out) 3491 proto->ops->debug_out(work_ccb); 3492 3493 /* 3494 * Device queues can be shared among multiple SIM instances 3495 * that reside on different buses. Use the SIM from the 3496 * queued device, rather than the one from the calling bus. 3497 */ 3498 sim = device->sim; 3499 mtx = sim->mtx; 3500 if (mtx && !mtx_owned(mtx)) 3501 mtx_lock(mtx); 3502 else 3503 mtx = NULL; 3504 work_ccb->ccb_h.qos.periph_data = cam_iosched_now(); 3505 (*(sim->sim_action))(sim, work_ccb); 3506 if (mtx) 3507 mtx_unlock(mtx); 3508 mtx_lock(&devq->send_mtx); 3509 } 3510 devq->send_queue.qfrozen_cnt--; 3511 } 3512 3513 /* 3514 * This function merges stuff from the slave ccb into the master ccb, while 3515 * keeping important fields in the master ccb constant. 3516 */ 3517 void 3518 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3519 { 3520 3521 /* 3522 * Pull fields that are valid for peripheral drivers to set 3523 * into the master CCB along with the CCB "payload". 3524 */ 3525 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3526 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3527 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3528 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3529 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3530 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3531 } 3532 3533 void 3534 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path, 3535 u_int32_t priority, u_int32_t flags) 3536 { 3537 3538 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3539 ccb_h->pinfo.priority = priority; 3540 ccb_h->path = path; 3541 ccb_h->path_id = path->bus->path_id; 3542 if (path->target) 3543 ccb_h->target_id = path->target->target_id; 3544 else 3545 ccb_h->target_id = CAM_TARGET_WILDCARD; 3546 if (path->device) { 3547 ccb_h->target_lun = path->device->lun_id; 3548 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3549 } else { 3550 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3551 } 3552 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3553 ccb_h->flags = flags; 3554 ccb_h->xflags = 0; 3555 } 3556 3557 void 3558 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3559 { 3560 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0); 3561 } 3562 3563 /* Path manipulation functions */ 3564 cam_status 3565 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3566 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3567 { 3568 struct cam_path *path; 3569 cam_status status; 3570 3571 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3572 3573 if (path == NULL) { 3574 status = CAM_RESRC_UNAVAIL; 3575 return(status); 3576 } 3577 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3578 if (status != CAM_REQ_CMP) { 3579 free(path, M_CAMPATH); 3580 path = NULL; 3581 } 3582 *new_path_ptr = path; 3583 return (status); 3584 } 3585 3586 cam_status 3587 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3588 struct cam_periph *periph, path_id_t path_id, 3589 target_id_t target_id, lun_id_t lun_id) 3590 { 3591 3592 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3593 lun_id)); 3594 } 3595 3596 cam_status 3597 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3598 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3599 { 3600 struct cam_eb *bus; 3601 struct cam_et *target; 3602 struct cam_ed *device; 3603 cam_status status; 3604 3605 status = CAM_REQ_CMP; /* Completed without error */ 3606 target = NULL; /* Wildcarded */ 3607 device = NULL; /* Wildcarded */ 3608 3609 /* 3610 * We will potentially modify the EDT, so block interrupts 3611 * that may attempt to create cam paths. 3612 */ 3613 bus = xpt_find_bus(path_id); 3614 if (bus == NULL) { 3615 status = CAM_PATH_INVALID; 3616 } else { 3617 xpt_lock_buses(); 3618 mtx_lock(&bus->eb_mtx); 3619 target = xpt_find_target(bus, target_id); 3620 if (target == NULL) { 3621 /* Create one */ 3622 struct cam_et *new_target; 3623 3624 new_target = xpt_alloc_target(bus, target_id); 3625 if (new_target == NULL) { 3626 status = CAM_RESRC_UNAVAIL; 3627 } else { 3628 target = new_target; 3629 } 3630 } 3631 xpt_unlock_buses(); 3632 if (target != NULL) { 3633 device = xpt_find_device(target, lun_id); 3634 if (device == NULL) { 3635 /* Create one */ 3636 struct cam_ed *new_device; 3637 3638 new_device = 3639 (*(bus->xport->ops->alloc_device))(bus, 3640 target, 3641 lun_id); 3642 if (new_device == NULL) { 3643 status = CAM_RESRC_UNAVAIL; 3644 } else { 3645 device = new_device; 3646 } 3647 } 3648 } 3649 mtx_unlock(&bus->eb_mtx); 3650 } 3651 3652 /* 3653 * Only touch the user's data if we are successful. 3654 */ 3655 if (status == CAM_REQ_CMP) { 3656 new_path->periph = perph; 3657 new_path->bus = bus; 3658 new_path->target = target; 3659 new_path->device = device; 3660 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3661 } else { 3662 if (device != NULL) 3663 xpt_release_device(device); 3664 if (target != NULL) 3665 xpt_release_target(target); 3666 if (bus != NULL) 3667 xpt_release_bus(bus); 3668 } 3669 return (status); 3670 } 3671 3672 cam_status 3673 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3674 { 3675 struct cam_path *new_path; 3676 3677 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3678 if (new_path == NULL) 3679 return(CAM_RESRC_UNAVAIL); 3680 xpt_copy_path(new_path, path); 3681 *new_path_ptr = new_path; 3682 return (CAM_REQ_CMP); 3683 } 3684 3685 void 3686 xpt_copy_path(struct cam_path *new_path, struct cam_path *path) 3687 { 3688 3689 *new_path = *path; 3690 if (path->bus != NULL) 3691 xpt_acquire_bus(path->bus); 3692 if (path->target != NULL) 3693 xpt_acquire_target(path->target); 3694 if (path->device != NULL) 3695 xpt_acquire_device(path->device); 3696 } 3697 3698 void 3699 xpt_release_path(struct cam_path *path) 3700 { 3701 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3702 if (path->device != NULL) { 3703 xpt_release_device(path->device); 3704 path->device = NULL; 3705 } 3706 if (path->target != NULL) { 3707 xpt_release_target(path->target); 3708 path->target = NULL; 3709 } 3710 if (path->bus != NULL) { 3711 xpt_release_bus(path->bus); 3712 path->bus = NULL; 3713 } 3714 } 3715 3716 void 3717 xpt_free_path(struct cam_path *path) 3718 { 3719 3720 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3721 xpt_release_path(path); 3722 free(path, M_CAMPATH); 3723 } 3724 3725 void 3726 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3727 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3728 { 3729 3730 xpt_lock_buses(); 3731 if (bus_ref) { 3732 if (path->bus) 3733 *bus_ref = path->bus->refcount; 3734 else 3735 *bus_ref = 0; 3736 } 3737 if (periph_ref) { 3738 if (path->periph) 3739 *periph_ref = path->periph->refcount; 3740 else 3741 *periph_ref = 0; 3742 } 3743 xpt_unlock_buses(); 3744 if (target_ref) { 3745 if (path->target) 3746 *target_ref = path->target->refcount; 3747 else 3748 *target_ref = 0; 3749 } 3750 if (device_ref) { 3751 if (path->device) 3752 *device_ref = path->device->refcount; 3753 else 3754 *device_ref = 0; 3755 } 3756 } 3757 3758 /* 3759 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3760 * in path1, 2 for match with wildcards in path2. 3761 */ 3762 int 3763 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3764 { 3765 int retval = 0; 3766 3767 if (path1->bus != path2->bus) { 3768 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3769 retval = 1; 3770 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3771 retval = 2; 3772 else 3773 return (-1); 3774 } 3775 if (path1->target != path2->target) { 3776 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3777 if (retval == 0) 3778 retval = 1; 3779 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3780 retval = 2; 3781 else 3782 return (-1); 3783 } 3784 if (path1->device != path2->device) { 3785 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3786 if (retval == 0) 3787 retval = 1; 3788 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3789 retval = 2; 3790 else 3791 return (-1); 3792 } 3793 return (retval); 3794 } 3795 3796 int 3797 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3798 { 3799 int retval = 0; 3800 3801 if (path->bus != dev->target->bus) { 3802 if (path->bus->path_id == CAM_BUS_WILDCARD) 3803 retval = 1; 3804 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3805 retval = 2; 3806 else 3807 return (-1); 3808 } 3809 if (path->target != dev->target) { 3810 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3811 if (retval == 0) 3812 retval = 1; 3813 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3814 retval = 2; 3815 else 3816 return (-1); 3817 } 3818 if (path->device != dev) { 3819 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3820 if (retval == 0) 3821 retval = 1; 3822 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3823 retval = 2; 3824 else 3825 return (-1); 3826 } 3827 return (retval); 3828 } 3829 3830 void 3831 xpt_print_path(struct cam_path *path) 3832 { 3833 struct sbuf sb; 3834 char buffer[XPT_PRINT_LEN]; 3835 3836 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3837 xpt_path_sbuf(path, &sb); 3838 sbuf_finish(&sb); 3839 printf("%s", sbuf_data(&sb)); 3840 sbuf_delete(&sb); 3841 } 3842 3843 void 3844 xpt_print_device(struct cam_ed *device) 3845 { 3846 3847 if (device == NULL) 3848 printf("(nopath): "); 3849 else { 3850 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3851 device->sim->unit_number, 3852 device->sim->bus_id, 3853 device->target->target_id, 3854 (uintmax_t)device->lun_id); 3855 } 3856 } 3857 3858 void 3859 xpt_print(struct cam_path *path, const char *fmt, ...) 3860 { 3861 va_list ap; 3862 struct sbuf sb; 3863 char buffer[XPT_PRINT_LEN]; 3864 3865 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3866 3867 xpt_path_sbuf(path, &sb); 3868 va_start(ap, fmt); 3869 sbuf_vprintf(&sb, fmt, ap); 3870 va_end(ap); 3871 3872 sbuf_finish(&sb); 3873 printf("%s", sbuf_data(&sb)); 3874 sbuf_delete(&sb); 3875 } 3876 3877 int 3878 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3879 { 3880 struct sbuf sb; 3881 int len; 3882 3883 sbuf_new(&sb, str, str_len, 0); 3884 len = xpt_path_sbuf(path, &sb); 3885 sbuf_finish(&sb); 3886 return (len); 3887 } 3888 3889 int 3890 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb) 3891 { 3892 3893 if (path == NULL) 3894 sbuf_printf(sb, "(nopath): "); 3895 else { 3896 if (path->periph != NULL) 3897 sbuf_printf(sb, "(%s%d:", path->periph->periph_name, 3898 path->periph->unit_number); 3899 else 3900 sbuf_printf(sb, "(noperiph:"); 3901 3902 if (path->bus != NULL) 3903 sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name, 3904 path->bus->sim->unit_number, 3905 path->bus->sim->bus_id); 3906 else 3907 sbuf_printf(sb, "nobus:"); 3908 3909 if (path->target != NULL) 3910 sbuf_printf(sb, "%d:", path->target->target_id); 3911 else 3912 sbuf_printf(sb, "X:"); 3913 3914 if (path->device != NULL) 3915 sbuf_printf(sb, "%jx): ", 3916 (uintmax_t)path->device->lun_id); 3917 else 3918 sbuf_printf(sb, "X): "); 3919 } 3920 3921 return(sbuf_len(sb)); 3922 } 3923 3924 path_id_t 3925 xpt_path_path_id(struct cam_path *path) 3926 { 3927 return(path->bus->path_id); 3928 } 3929 3930 target_id_t 3931 xpt_path_target_id(struct cam_path *path) 3932 { 3933 if (path->target != NULL) 3934 return (path->target->target_id); 3935 else 3936 return (CAM_TARGET_WILDCARD); 3937 } 3938 3939 lun_id_t 3940 xpt_path_lun_id(struct cam_path *path) 3941 { 3942 if (path->device != NULL) 3943 return (path->device->lun_id); 3944 else 3945 return (CAM_LUN_WILDCARD); 3946 } 3947 3948 struct cam_sim * 3949 xpt_path_sim(struct cam_path *path) 3950 { 3951 3952 return (path->bus->sim); 3953 } 3954 3955 struct cam_periph* 3956 xpt_path_periph(struct cam_path *path) 3957 { 3958 3959 return (path->periph); 3960 } 3961 3962 /* 3963 * Release a CAM control block for the caller. Remit the cost of the structure 3964 * to the device referenced by the path. If the this device had no 'credits' 3965 * and peripheral drivers have registered async callbacks for this notification 3966 * call them now. 3967 */ 3968 void 3969 xpt_release_ccb(union ccb *free_ccb) 3970 { 3971 struct cam_ed *device; 3972 struct cam_periph *periph; 3973 3974 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3975 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3976 device = free_ccb->ccb_h.path->device; 3977 periph = free_ccb->ccb_h.path->periph; 3978 3979 xpt_free_ccb(free_ccb); 3980 periph->periph_allocated--; 3981 cam_ccbq_release_opening(&device->ccbq); 3982 xpt_run_allocq(periph, 0); 3983 } 3984 3985 /* Functions accessed by SIM drivers */ 3986 3987 static struct xpt_xport_ops xport_default_ops = { 3988 .alloc_device = xpt_alloc_device_default, 3989 .action = xpt_action_default, 3990 .async = xpt_dev_async_default, 3991 }; 3992 static struct xpt_xport xport_default = { 3993 .xport = XPORT_UNKNOWN, 3994 .name = "unknown", 3995 .ops = &xport_default_ops, 3996 }; 3997 3998 CAM_XPT_XPORT(xport_default); 3999 4000 /* 4001 * A sim structure, listing the SIM entry points and instance 4002 * identification info is passed to xpt_bus_register to hook the SIM 4003 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4004 * for this new bus and places it in the array of buses and assigns 4005 * it a path_id. The path_id may be influenced by "hard wiring" 4006 * information specified by the user. Once interrupt services are 4007 * available, the bus will be probed. 4008 */ 4009 int32_t 4010 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 4011 { 4012 struct cam_eb *new_bus; 4013 struct cam_eb *old_bus; 4014 struct ccb_pathinq cpi; 4015 struct cam_path *path; 4016 cam_status status; 4017 4018 sim->bus_id = bus; 4019 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 4020 M_CAMXPT, M_NOWAIT|M_ZERO); 4021 if (new_bus == NULL) { 4022 /* Couldn't satisfy request */ 4023 return (CAM_RESRC_UNAVAIL); 4024 } 4025 4026 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 4027 TAILQ_INIT(&new_bus->et_entries); 4028 cam_sim_hold(sim); 4029 new_bus->sim = sim; 4030 timevalclear(&new_bus->last_reset); 4031 new_bus->flags = 0; 4032 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4033 new_bus->generation = 0; 4034 4035 xpt_lock_buses(); 4036 sim->path_id = new_bus->path_id = 4037 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4038 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4039 while (old_bus != NULL 4040 && old_bus->path_id < new_bus->path_id) 4041 old_bus = TAILQ_NEXT(old_bus, links); 4042 if (old_bus != NULL) 4043 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4044 else 4045 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4046 xsoftc.bus_generation++; 4047 xpt_unlock_buses(); 4048 4049 /* 4050 * Set a default transport so that a PATH_INQ can be issued to 4051 * the SIM. This will then allow for probing and attaching of 4052 * a more appropriate transport. 4053 */ 4054 new_bus->xport = &xport_default; 4055 4056 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 4057 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4058 if (status != CAM_REQ_CMP) { 4059 xpt_release_bus(new_bus); 4060 return (CAM_RESRC_UNAVAIL); 4061 } 4062 4063 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 4064 cpi.ccb_h.func_code = XPT_PATH_INQ; 4065 xpt_action((union ccb *)&cpi); 4066 4067 if (cpi.ccb_h.status == CAM_REQ_CMP) { 4068 struct xpt_xport **xpt; 4069 4070 SET_FOREACH(xpt, cam_xpt_xport_set) { 4071 if ((*xpt)->xport == cpi.transport) { 4072 new_bus->xport = *xpt; 4073 break; 4074 } 4075 } 4076 if (new_bus->xport == NULL) { 4077 xpt_print(path, 4078 "No transport found for %d\n", cpi.transport); 4079 xpt_release_bus(new_bus); 4080 free(path, M_CAMXPT); 4081 return (CAM_RESRC_UNAVAIL); 4082 } 4083 } 4084 4085 /* Notify interested parties */ 4086 if (sim->path_id != CAM_XPT_PATH_ID) { 4087 4088 xpt_async(AC_PATH_REGISTERED, path, &cpi); 4089 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 4090 union ccb *scan_ccb; 4091 4092 /* Initiate bus rescan. */ 4093 scan_ccb = xpt_alloc_ccb_nowait(); 4094 if (scan_ccb != NULL) { 4095 scan_ccb->ccb_h.path = path; 4096 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 4097 scan_ccb->crcn.flags = 0; 4098 xpt_rescan(scan_ccb); 4099 } else { 4100 xpt_print(path, 4101 "Can't allocate CCB to scan bus\n"); 4102 xpt_free_path(path); 4103 } 4104 } else 4105 xpt_free_path(path); 4106 } else 4107 xpt_free_path(path); 4108 return (CAM_SUCCESS); 4109 } 4110 4111 int32_t 4112 xpt_bus_deregister(path_id_t pathid) 4113 { 4114 struct cam_path bus_path; 4115 cam_status status; 4116 4117 status = xpt_compile_path(&bus_path, NULL, pathid, 4118 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4119 if (status != CAM_REQ_CMP) 4120 return (status); 4121 4122 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4123 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4124 4125 /* Release the reference count held while registered. */ 4126 xpt_release_bus(bus_path.bus); 4127 xpt_release_path(&bus_path); 4128 4129 return (CAM_REQ_CMP); 4130 } 4131 4132 static path_id_t 4133 xptnextfreepathid(void) 4134 { 4135 struct cam_eb *bus; 4136 path_id_t pathid; 4137 const char *strval; 4138 4139 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4140 pathid = 0; 4141 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4142 retry: 4143 /* Find an unoccupied pathid */ 4144 while (bus != NULL && bus->path_id <= pathid) { 4145 if (bus->path_id == pathid) 4146 pathid++; 4147 bus = TAILQ_NEXT(bus, links); 4148 } 4149 4150 /* 4151 * Ensure that this pathid is not reserved for 4152 * a bus that may be registered in the future. 4153 */ 4154 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4155 ++pathid; 4156 /* Start the search over */ 4157 goto retry; 4158 } 4159 return (pathid); 4160 } 4161 4162 static path_id_t 4163 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4164 { 4165 path_id_t pathid; 4166 int i, dunit, val; 4167 char buf[32]; 4168 const char *dname; 4169 4170 pathid = CAM_XPT_PATH_ID; 4171 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4172 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 4173 return (pathid); 4174 i = 0; 4175 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4176 if (strcmp(dname, "scbus")) { 4177 /* Avoid a bit of foot shooting. */ 4178 continue; 4179 } 4180 if (dunit < 0) /* unwired?! */ 4181 continue; 4182 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4183 if (sim_bus == val) { 4184 pathid = dunit; 4185 break; 4186 } 4187 } else if (sim_bus == 0) { 4188 /* Unspecified matches bus 0 */ 4189 pathid = dunit; 4190 break; 4191 } else { 4192 printf("Ambiguous scbus configuration for %s%d " 4193 "bus %d, cannot wire down. The kernel " 4194 "config entry for scbus%d should " 4195 "specify a controller bus.\n" 4196 "Scbus will be assigned dynamically.\n", 4197 sim_name, sim_unit, sim_bus, dunit); 4198 break; 4199 } 4200 } 4201 4202 if (pathid == CAM_XPT_PATH_ID) 4203 pathid = xptnextfreepathid(); 4204 return (pathid); 4205 } 4206 4207 static const char * 4208 xpt_async_string(u_int32_t async_code) 4209 { 4210 4211 switch (async_code) { 4212 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4213 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4214 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4215 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4216 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4217 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4218 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4219 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4220 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4221 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4222 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4223 case AC_CONTRACT: return ("AC_CONTRACT"); 4224 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4225 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4226 } 4227 return ("AC_UNKNOWN"); 4228 } 4229 4230 static int 4231 xpt_async_size(u_int32_t async_code) 4232 { 4233 4234 switch (async_code) { 4235 case AC_BUS_RESET: return (0); 4236 case AC_UNSOL_RESEL: return (0); 4237 case AC_SCSI_AEN: return (0); 4238 case AC_SENT_BDR: return (0); 4239 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4240 case AC_PATH_DEREGISTERED: return (0); 4241 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4242 case AC_LOST_DEVICE: return (0); 4243 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4244 case AC_INQ_CHANGED: return (0); 4245 case AC_GETDEV_CHANGED: return (0); 4246 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4247 case AC_ADVINFO_CHANGED: return (-1); 4248 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4249 } 4250 return (0); 4251 } 4252 4253 static int 4254 xpt_async_process_dev(struct cam_ed *device, void *arg) 4255 { 4256 union ccb *ccb = arg; 4257 struct cam_path *path = ccb->ccb_h.path; 4258 void *async_arg = ccb->casync.async_arg_ptr; 4259 u_int32_t async_code = ccb->casync.async_code; 4260 int relock; 4261 4262 if (path->device != device 4263 && path->device->lun_id != CAM_LUN_WILDCARD 4264 && device->lun_id != CAM_LUN_WILDCARD) 4265 return (1); 4266 4267 /* 4268 * The async callback could free the device. 4269 * If it is a broadcast async, it doesn't hold 4270 * device reference, so take our own reference. 4271 */ 4272 xpt_acquire_device(device); 4273 4274 /* 4275 * If async for specific device is to be delivered to 4276 * the wildcard client, take the specific device lock. 4277 * XXX: We may need a way for client to specify it. 4278 */ 4279 if ((device->lun_id == CAM_LUN_WILDCARD && 4280 path->device->lun_id != CAM_LUN_WILDCARD) || 4281 (device->target->target_id == CAM_TARGET_WILDCARD && 4282 path->target->target_id != CAM_TARGET_WILDCARD) || 4283 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4284 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4285 mtx_unlock(&device->device_mtx); 4286 xpt_path_lock(path); 4287 relock = 1; 4288 } else 4289 relock = 0; 4290 4291 (*(device->target->bus->xport->ops->async))(async_code, 4292 device->target->bus, device->target, device, async_arg); 4293 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4294 4295 if (relock) { 4296 xpt_path_unlock(path); 4297 mtx_lock(&device->device_mtx); 4298 } 4299 xpt_release_device(device); 4300 return (1); 4301 } 4302 4303 static int 4304 xpt_async_process_tgt(struct cam_et *target, void *arg) 4305 { 4306 union ccb *ccb = arg; 4307 struct cam_path *path = ccb->ccb_h.path; 4308 4309 if (path->target != target 4310 && path->target->target_id != CAM_TARGET_WILDCARD 4311 && target->target_id != CAM_TARGET_WILDCARD) 4312 return (1); 4313 4314 if (ccb->casync.async_code == AC_SENT_BDR) { 4315 /* Update our notion of when the last reset occurred */ 4316 microtime(&target->last_reset); 4317 } 4318 4319 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4320 } 4321 4322 static void 4323 xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4324 { 4325 struct cam_eb *bus; 4326 struct cam_path *path; 4327 void *async_arg; 4328 u_int32_t async_code; 4329 4330 path = ccb->ccb_h.path; 4331 async_code = ccb->casync.async_code; 4332 async_arg = ccb->casync.async_arg_ptr; 4333 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4334 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4335 bus = path->bus; 4336 4337 if (async_code == AC_BUS_RESET) { 4338 /* Update our notion of when the last reset occurred */ 4339 microtime(&bus->last_reset); 4340 } 4341 4342 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4343 4344 /* 4345 * If this wasn't a fully wildcarded async, tell all 4346 * clients that want all async events. 4347 */ 4348 if (bus != xpt_periph->path->bus) { 4349 xpt_path_lock(xpt_periph->path); 4350 xpt_async_process_dev(xpt_periph->path->device, ccb); 4351 xpt_path_unlock(xpt_periph->path); 4352 } 4353 4354 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4355 xpt_release_devq(path, 1, TRUE); 4356 else 4357 xpt_release_simq(path->bus->sim, TRUE); 4358 if (ccb->casync.async_arg_size > 0) 4359 free(async_arg, M_CAMXPT); 4360 xpt_free_path(path); 4361 xpt_free_ccb(ccb); 4362 } 4363 4364 static void 4365 xpt_async_bcast(struct async_list *async_head, 4366 u_int32_t async_code, 4367 struct cam_path *path, void *async_arg) 4368 { 4369 struct async_node *cur_entry; 4370 struct mtx *mtx; 4371 4372 cur_entry = SLIST_FIRST(async_head); 4373 while (cur_entry != NULL) { 4374 struct async_node *next_entry; 4375 /* 4376 * Grab the next list entry before we call the current 4377 * entry's callback. This is because the callback function 4378 * can delete its async callback entry. 4379 */ 4380 next_entry = SLIST_NEXT(cur_entry, links); 4381 if ((cur_entry->event_enable & async_code) != 0) { 4382 mtx = cur_entry->event_lock ? 4383 path->device->sim->mtx : NULL; 4384 if (mtx) 4385 mtx_lock(mtx); 4386 cur_entry->callback(cur_entry->callback_arg, 4387 async_code, path, 4388 async_arg); 4389 if (mtx) 4390 mtx_unlock(mtx); 4391 } 4392 cur_entry = next_entry; 4393 } 4394 } 4395 4396 void 4397 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4398 { 4399 union ccb *ccb; 4400 int size; 4401 4402 ccb = xpt_alloc_ccb_nowait(); 4403 if (ccb == NULL) { 4404 xpt_print(path, "Can't allocate CCB to send %s\n", 4405 xpt_async_string(async_code)); 4406 return; 4407 } 4408 4409 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4410 xpt_print(path, "Can't allocate path to send %s\n", 4411 xpt_async_string(async_code)); 4412 xpt_free_ccb(ccb); 4413 return; 4414 } 4415 ccb->ccb_h.path->periph = NULL; 4416 ccb->ccb_h.func_code = XPT_ASYNC; 4417 ccb->ccb_h.cbfcnp = xpt_async_process; 4418 ccb->ccb_h.flags |= CAM_UNLOCKED; 4419 ccb->casync.async_code = async_code; 4420 ccb->casync.async_arg_size = 0; 4421 size = xpt_async_size(async_code); 4422 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 4423 ("xpt_async: func %#x %s aync_code %d %s\n", 4424 ccb->ccb_h.func_code, 4425 xpt_action_name(ccb->ccb_h.func_code), 4426 async_code, 4427 xpt_async_string(async_code))); 4428 if (size > 0 && async_arg != NULL) { 4429 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4430 if (ccb->casync.async_arg_ptr == NULL) { 4431 xpt_print(path, "Can't allocate argument to send %s\n", 4432 xpt_async_string(async_code)); 4433 xpt_free_path(ccb->ccb_h.path); 4434 xpt_free_ccb(ccb); 4435 return; 4436 } 4437 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4438 ccb->casync.async_arg_size = size; 4439 } else if (size < 0) { 4440 ccb->casync.async_arg_ptr = async_arg; 4441 ccb->casync.async_arg_size = size; 4442 } 4443 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4444 xpt_freeze_devq(path, 1); 4445 else 4446 xpt_freeze_simq(path->bus->sim, 1); 4447 xpt_done(ccb); 4448 } 4449 4450 static void 4451 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4452 struct cam_et *target, struct cam_ed *device, 4453 void *async_arg) 4454 { 4455 4456 /* 4457 * We only need to handle events for real devices. 4458 */ 4459 if (target->target_id == CAM_TARGET_WILDCARD 4460 || device->lun_id == CAM_LUN_WILDCARD) 4461 return; 4462 4463 printf("%s called\n", __func__); 4464 } 4465 4466 static uint32_t 4467 xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4468 { 4469 struct cam_devq *devq; 4470 uint32_t freeze; 4471 4472 devq = dev->sim->devq; 4473 mtx_assert(&devq->send_mtx, MA_OWNED); 4474 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4475 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4476 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4477 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4478 /* Remove frozen device from sendq. */ 4479 if (device_is_queued(dev)) 4480 camq_remove(&devq->send_queue, dev->devq_entry.index); 4481 return (freeze); 4482 } 4483 4484 u_int32_t 4485 xpt_freeze_devq(struct cam_path *path, u_int count) 4486 { 4487 struct cam_ed *dev = path->device; 4488 struct cam_devq *devq; 4489 uint32_t freeze; 4490 4491 devq = dev->sim->devq; 4492 mtx_lock(&devq->send_mtx); 4493 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4494 freeze = xpt_freeze_devq_device(dev, count); 4495 mtx_unlock(&devq->send_mtx); 4496 return (freeze); 4497 } 4498 4499 u_int32_t 4500 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4501 { 4502 struct cam_devq *devq; 4503 uint32_t freeze; 4504 4505 devq = sim->devq; 4506 mtx_lock(&devq->send_mtx); 4507 freeze = (devq->send_queue.qfrozen_cnt += count); 4508 mtx_unlock(&devq->send_mtx); 4509 return (freeze); 4510 } 4511 4512 static void 4513 xpt_release_devq_timeout(void *arg) 4514 { 4515 struct cam_ed *dev; 4516 struct cam_devq *devq; 4517 4518 dev = (struct cam_ed *)arg; 4519 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4520 devq = dev->sim->devq; 4521 mtx_assert(&devq->send_mtx, MA_OWNED); 4522 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4523 xpt_run_devq(devq); 4524 } 4525 4526 void 4527 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4528 { 4529 struct cam_ed *dev; 4530 struct cam_devq *devq; 4531 4532 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4533 count, run_queue)); 4534 dev = path->device; 4535 devq = dev->sim->devq; 4536 mtx_lock(&devq->send_mtx); 4537 if (xpt_release_devq_device(dev, count, run_queue)) 4538 xpt_run_devq(dev->sim->devq); 4539 mtx_unlock(&devq->send_mtx); 4540 } 4541 4542 static int 4543 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4544 { 4545 4546 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4547 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4548 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4549 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4550 if (count > dev->ccbq.queue.qfrozen_cnt) { 4551 #ifdef INVARIANTS 4552 printf("xpt_release_devq(): requested %u > present %u\n", 4553 count, dev->ccbq.queue.qfrozen_cnt); 4554 #endif 4555 count = dev->ccbq.queue.qfrozen_cnt; 4556 } 4557 dev->ccbq.queue.qfrozen_cnt -= count; 4558 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4559 /* 4560 * No longer need to wait for a successful 4561 * command completion. 4562 */ 4563 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4564 /* 4565 * Remove any timeouts that might be scheduled 4566 * to release this queue. 4567 */ 4568 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4569 callout_stop(&dev->callout); 4570 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4571 } 4572 /* 4573 * Now that we are unfrozen schedule the 4574 * device so any pending transactions are 4575 * run. 4576 */ 4577 xpt_schedule_devq(dev->sim->devq, dev); 4578 } else 4579 run_queue = 0; 4580 return (run_queue); 4581 } 4582 4583 void 4584 xpt_release_simq(struct cam_sim *sim, int run_queue) 4585 { 4586 struct cam_devq *devq; 4587 4588 devq = sim->devq; 4589 mtx_lock(&devq->send_mtx); 4590 if (devq->send_queue.qfrozen_cnt <= 0) { 4591 #ifdef INVARIANTS 4592 printf("xpt_release_simq: requested 1 > present %u\n", 4593 devq->send_queue.qfrozen_cnt); 4594 #endif 4595 } else 4596 devq->send_queue.qfrozen_cnt--; 4597 if (devq->send_queue.qfrozen_cnt == 0) { 4598 /* 4599 * If there is a timeout scheduled to release this 4600 * sim queue, remove it. The queue frozen count is 4601 * already at 0. 4602 */ 4603 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4604 callout_stop(&sim->callout); 4605 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4606 } 4607 if (run_queue) { 4608 /* 4609 * Now that we are unfrozen run the send queue. 4610 */ 4611 xpt_run_devq(sim->devq); 4612 } 4613 } 4614 mtx_unlock(&devq->send_mtx); 4615 } 4616 4617 /* 4618 * XXX Appears to be unused. 4619 */ 4620 static void 4621 xpt_release_simq_timeout(void *arg) 4622 { 4623 struct cam_sim *sim; 4624 4625 sim = (struct cam_sim *)arg; 4626 xpt_release_simq(sim, /* run_queue */ TRUE); 4627 } 4628 4629 void 4630 xpt_done(union ccb *done_ccb) 4631 { 4632 struct cam_doneq *queue; 4633 int run, hash; 4634 4635 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 4636 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO && 4637 done_ccb->csio.bio != NULL) 4638 biotrack(done_ccb->csio.bio, __func__); 4639 #endif 4640 4641 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4642 ("xpt_done: func= %#x %s status %#x\n", 4643 done_ccb->ccb_h.func_code, 4644 xpt_action_name(done_ccb->ccb_h.func_code), 4645 done_ccb->ccb_h.status)); 4646 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4647 return; 4648 4649 /* Store the time the ccb was in the sim */ 4650 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); 4651 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4652 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4653 queue = &cam_doneqs[hash]; 4654 mtx_lock(&queue->cam_doneq_mtx); 4655 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4656 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4657 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4658 mtx_unlock(&queue->cam_doneq_mtx); 4659 if (run) 4660 wakeup(&queue->cam_doneq); 4661 } 4662 4663 void 4664 xpt_done_direct(union ccb *done_ccb) 4665 { 4666 4667 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4668 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status)); 4669 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4670 return; 4671 4672 /* Store the time the ccb was in the sim */ 4673 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); 4674 xpt_done_process(&done_ccb->ccb_h); 4675 } 4676 4677 union ccb * 4678 xpt_alloc_ccb() 4679 { 4680 union ccb *new_ccb; 4681 4682 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4683 return (new_ccb); 4684 } 4685 4686 union ccb * 4687 xpt_alloc_ccb_nowait() 4688 { 4689 union ccb *new_ccb; 4690 4691 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4692 return (new_ccb); 4693 } 4694 4695 void 4696 xpt_free_ccb(union ccb *free_ccb) 4697 { 4698 free(free_ccb, M_CAMCCB); 4699 } 4700 4701 4702 4703 /* Private XPT functions */ 4704 4705 /* 4706 * Get a CAM control block for the caller. Charge the structure to the device 4707 * referenced by the path. If we don't have sufficient resources to allocate 4708 * more ccbs, we return NULL. 4709 */ 4710 static union ccb * 4711 xpt_get_ccb_nowait(struct cam_periph *periph) 4712 { 4713 union ccb *new_ccb; 4714 4715 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4716 if (new_ccb == NULL) 4717 return (NULL); 4718 periph->periph_allocated++; 4719 cam_ccbq_take_opening(&periph->path->device->ccbq); 4720 return (new_ccb); 4721 } 4722 4723 static union ccb * 4724 xpt_get_ccb(struct cam_periph *periph) 4725 { 4726 union ccb *new_ccb; 4727 4728 cam_periph_unlock(periph); 4729 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4730 cam_periph_lock(periph); 4731 periph->periph_allocated++; 4732 cam_ccbq_take_opening(&periph->path->device->ccbq); 4733 return (new_ccb); 4734 } 4735 4736 union ccb * 4737 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4738 { 4739 struct ccb_hdr *ccb_h; 4740 4741 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4742 cam_periph_assert(periph, MA_OWNED); 4743 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4744 ccb_h->pinfo.priority != priority) { 4745 if (priority < periph->immediate_priority) { 4746 periph->immediate_priority = priority; 4747 xpt_run_allocq(periph, 0); 4748 } else 4749 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4750 "cgticb", 0); 4751 } 4752 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4753 return ((union ccb *)ccb_h); 4754 } 4755 4756 static void 4757 xpt_acquire_bus(struct cam_eb *bus) 4758 { 4759 4760 xpt_lock_buses(); 4761 bus->refcount++; 4762 xpt_unlock_buses(); 4763 } 4764 4765 static void 4766 xpt_release_bus(struct cam_eb *bus) 4767 { 4768 4769 xpt_lock_buses(); 4770 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4771 if (--bus->refcount > 0) { 4772 xpt_unlock_buses(); 4773 return; 4774 } 4775 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4776 xsoftc.bus_generation++; 4777 xpt_unlock_buses(); 4778 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4779 ("destroying bus, but target list is not empty")); 4780 cam_sim_release(bus->sim); 4781 mtx_destroy(&bus->eb_mtx); 4782 free(bus, M_CAMXPT); 4783 } 4784 4785 static struct cam_et * 4786 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4787 { 4788 struct cam_et *cur_target, *target; 4789 4790 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4791 mtx_assert(&bus->eb_mtx, MA_OWNED); 4792 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4793 M_NOWAIT|M_ZERO); 4794 if (target == NULL) 4795 return (NULL); 4796 4797 TAILQ_INIT(&target->ed_entries); 4798 target->bus = bus; 4799 target->target_id = target_id; 4800 target->refcount = 1; 4801 target->generation = 0; 4802 target->luns = NULL; 4803 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4804 timevalclear(&target->last_reset); 4805 /* 4806 * Hold a reference to our parent bus so it 4807 * will not go away before we do. 4808 */ 4809 bus->refcount++; 4810 4811 /* Insertion sort into our bus's target list */ 4812 cur_target = TAILQ_FIRST(&bus->et_entries); 4813 while (cur_target != NULL && cur_target->target_id < target_id) 4814 cur_target = TAILQ_NEXT(cur_target, links); 4815 if (cur_target != NULL) { 4816 TAILQ_INSERT_BEFORE(cur_target, target, links); 4817 } else { 4818 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4819 } 4820 bus->generation++; 4821 return (target); 4822 } 4823 4824 static void 4825 xpt_acquire_target(struct cam_et *target) 4826 { 4827 struct cam_eb *bus = target->bus; 4828 4829 mtx_lock(&bus->eb_mtx); 4830 target->refcount++; 4831 mtx_unlock(&bus->eb_mtx); 4832 } 4833 4834 static void 4835 xpt_release_target(struct cam_et *target) 4836 { 4837 struct cam_eb *bus = target->bus; 4838 4839 mtx_lock(&bus->eb_mtx); 4840 if (--target->refcount > 0) { 4841 mtx_unlock(&bus->eb_mtx); 4842 return; 4843 } 4844 TAILQ_REMOVE(&bus->et_entries, target, links); 4845 bus->generation++; 4846 mtx_unlock(&bus->eb_mtx); 4847 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4848 ("destroying target, but device list is not empty")); 4849 xpt_release_bus(bus); 4850 mtx_destroy(&target->luns_mtx); 4851 if (target->luns) 4852 free(target->luns, M_CAMXPT); 4853 free(target, M_CAMXPT); 4854 } 4855 4856 static struct cam_ed * 4857 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4858 lun_id_t lun_id) 4859 { 4860 struct cam_ed *device; 4861 4862 device = xpt_alloc_device(bus, target, lun_id); 4863 if (device == NULL) 4864 return (NULL); 4865 4866 device->mintags = 1; 4867 device->maxtags = 1; 4868 return (device); 4869 } 4870 4871 static void 4872 xpt_destroy_device(void *context, int pending) 4873 { 4874 struct cam_ed *device = context; 4875 4876 mtx_lock(&device->device_mtx); 4877 mtx_destroy(&device->device_mtx); 4878 free(device, M_CAMDEV); 4879 } 4880 4881 struct cam_ed * 4882 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4883 { 4884 struct cam_ed *cur_device, *device; 4885 struct cam_devq *devq; 4886 cam_status status; 4887 4888 mtx_assert(&bus->eb_mtx, MA_OWNED); 4889 /* Make space for us in the device queue on our bus */ 4890 devq = bus->sim->devq; 4891 mtx_lock(&devq->send_mtx); 4892 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4893 mtx_unlock(&devq->send_mtx); 4894 if (status != CAM_REQ_CMP) 4895 return (NULL); 4896 4897 device = (struct cam_ed *)malloc(sizeof(*device), 4898 M_CAMDEV, M_NOWAIT|M_ZERO); 4899 if (device == NULL) 4900 return (NULL); 4901 4902 cam_init_pinfo(&device->devq_entry); 4903 device->target = target; 4904 device->lun_id = lun_id; 4905 device->sim = bus->sim; 4906 if (cam_ccbq_init(&device->ccbq, 4907 bus->sim->max_dev_openings) != 0) { 4908 free(device, M_CAMDEV); 4909 return (NULL); 4910 } 4911 SLIST_INIT(&device->asyncs); 4912 SLIST_INIT(&device->periphs); 4913 device->generation = 0; 4914 device->flags = CAM_DEV_UNCONFIGURED; 4915 device->tag_delay_count = 0; 4916 device->tag_saved_openings = 0; 4917 device->refcount = 1; 4918 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4919 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4920 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4921 /* 4922 * Hold a reference to our parent bus so it 4923 * will not go away before we do. 4924 */ 4925 target->refcount++; 4926 4927 cur_device = TAILQ_FIRST(&target->ed_entries); 4928 while (cur_device != NULL && cur_device->lun_id < lun_id) 4929 cur_device = TAILQ_NEXT(cur_device, links); 4930 if (cur_device != NULL) 4931 TAILQ_INSERT_BEFORE(cur_device, device, links); 4932 else 4933 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4934 target->generation++; 4935 return (device); 4936 } 4937 4938 void 4939 xpt_acquire_device(struct cam_ed *device) 4940 { 4941 struct cam_eb *bus = device->target->bus; 4942 4943 mtx_lock(&bus->eb_mtx); 4944 device->refcount++; 4945 mtx_unlock(&bus->eb_mtx); 4946 } 4947 4948 void 4949 xpt_release_device(struct cam_ed *device) 4950 { 4951 struct cam_eb *bus = device->target->bus; 4952 struct cam_devq *devq; 4953 4954 mtx_lock(&bus->eb_mtx); 4955 if (--device->refcount > 0) { 4956 mtx_unlock(&bus->eb_mtx); 4957 return; 4958 } 4959 4960 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4961 device->target->generation++; 4962 mtx_unlock(&bus->eb_mtx); 4963 4964 /* Release our slot in the devq */ 4965 devq = bus->sim->devq; 4966 mtx_lock(&devq->send_mtx); 4967 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4968 mtx_unlock(&devq->send_mtx); 4969 4970 KASSERT(SLIST_EMPTY(&device->periphs), 4971 ("destroying device, but periphs list is not empty")); 4972 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4973 ("destroying device while still queued for ccbs")); 4974 4975 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4976 callout_stop(&device->callout); 4977 4978 xpt_release_target(device->target); 4979 4980 cam_ccbq_fini(&device->ccbq); 4981 /* 4982 * Free allocated memory. free(9) does nothing if the 4983 * supplied pointer is NULL, so it is safe to call without 4984 * checking. 4985 */ 4986 free(device->supported_vpds, M_CAMXPT); 4987 free(device->device_id, M_CAMXPT); 4988 free(device->ext_inq, M_CAMXPT); 4989 free(device->physpath, M_CAMXPT); 4990 free(device->rcap_buf, M_CAMXPT); 4991 free(device->serial_num, M_CAMXPT); 4992 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 4993 } 4994 4995 u_int32_t 4996 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4997 { 4998 int result; 4999 struct cam_ed *dev; 5000 5001 dev = path->device; 5002 mtx_lock(&dev->sim->devq->send_mtx); 5003 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5004 mtx_unlock(&dev->sim->devq->send_mtx); 5005 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5006 || (dev->inq_flags & SID_CmdQue) != 0) 5007 dev->tag_saved_openings = newopenings; 5008 return (result); 5009 } 5010 5011 static struct cam_eb * 5012 xpt_find_bus(path_id_t path_id) 5013 { 5014 struct cam_eb *bus; 5015 5016 xpt_lock_buses(); 5017 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 5018 bus != NULL; 5019 bus = TAILQ_NEXT(bus, links)) { 5020 if (bus->path_id == path_id) { 5021 bus->refcount++; 5022 break; 5023 } 5024 } 5025 xpt_unlock_buses(); 5026 return (bus); 5027 } 5028 5029 static struct cam_et * 5030 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5031 { 5032 struct cam_et *target; 5033 5034 mtx_assert(&bus->eb_mtx, MA_OWNED); 5035 for (target = TAILQ_FIRST(&bus->et_entries); 5036 target != NULL; 5037 target = TAILQ_NEXT(target, links)) { 5038 if (target->target_id == target_id) { 5039 target->refcount++; 5040 break; 5041 } 5042 } 5043 return (target); 5044 } 5045 5046 static struct cam_ed * 5047 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5048 { 5049 struct cam_ed *device; 5050 5051 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 5052 for (device = TAILQ_FIRST(&target->ed_entries); 5053 device != NULL; 5054 device = TAILQ_NEXT(device, links)) { 5055 if (device->lun_id == lun_id) { 5056 device->refcount++; 5057 break; 5058 } 5059 } 5060 return (device); 5061 } 5062 5063 void 5064 xpt_start_tags(struct cam_path *path) 5065 { 5066 struct ccb_relsim crs; 5067 struct cam_ed *device; 5068 struct cam_sim *sim; 5069 int newopenings; 5070 5071 device = path->device; 5072 sim = path->bus->sim; 5073 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5074 xpt_freeze_devq(path, /*count*/1); 5075 device->inq_flags |= SID_CmdQue; 5076 if (device->tag_saved_openings != 0) 5077 newopenings = device->tag_saved_openings; 5078 else 5079 newopenings = min(device->maxtags, 5080 sim->max_tagged_dev_openings); 5081 xpt_dev_ccbq_resize(path, newopenings); 5082 xpt_async(AC_GETDEV_CHANGED, path, NULL); 5083 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 5084 crs.ccb_h.func_code = XPT_REL_SIMQ; 5085 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5086 crs.openings 5087 = crs.release_timeout 5088 = crs.qfrozen_cnt 5089 = 0; 5090 xpt_action((union ccb *)&crs); 5091 } 5092 5093 void 5094 xpt_stop_tags(struct cam_path *path) 5095 { 5096 struct ccb_relsim crs; 5097 struct cam_ed *device; 5098 struct cam_sim *sim; 5099 5100 device = path->device; 5101 sim = path->bus->sim; 5102 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5103 device->tag_delay_count = 0; 5104 xpt_freeze_devq(path, /*count*/1); 5105 device->inq_flags &= ~SID_CmdQue; 5106 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 5107 xpt_async(AC_GETDEV_CHANGED, path, NULL); 5108 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 5109 crs.ccb_h.func_code = XPT_REL_SIMQ; 5110 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5111 crs.openings 5112 = crs.release_timeout 5113 = crs.qfrozen_cnt 5114 = 0; 5115 xpt_action((union ccb *)&crs); 5116 } 5117 5118 static void 5119 xpt_boot_delay(void *arg) 5120 { 5121 5122 xpt_release_boot(); 5123 } 5124 5125 static void 5126 xpt_config(void *arg) 5127 { 5128 /* 5129 * Now that interrupts are enabled, go find our devices 5130 */ 5131 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 5132 printf("xpt_config: failed to create taskqueue thread.\n"); 5133 5134 /* Setup debugging path */ 5135 if (cam_dflags != CAM_DEBUG_NONE) { 5136 if (xpt_create_path(&cam_dpath, NULL, 5137 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 5138 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 5139 printf("xpt_config: xpt_create_path() failed for debug" 5140 " target %d:%d:%d, debugging disabled\n", 5141 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 5142 cam_dflags = CAM_DEBUG_NONE; 5143 } 5144 } else 5145 cam_dpath = NULL; 5146 5147 periphdriver_init(1); 5148 xpt_hold_boot(); 5149 callout_init(&xsoftc.boot_callout, 1); 5150 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0, 5151 xpt_boot_delay, NULL, 0); 5152 /* Fire up rescan thread. */ 5153 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 5154 "cam", "scanner")) { 5155 printf("xpt_config: failed to create rescan thread.\n"); 5156 } 5157 } 5158 5159 void 5160 xpt_hold_boot(void) 5161 { 5162 xpt_lock_buses(); 5163 xsoftc.buses_to_config++; 5164 xpt_unlock_buses(); 5165 } 5166 5167 void 5168 xpt_release_boot(void) 5169 { 5170 xpt_lock_buses(); 5171 xsoftc.buses_to_config--; 5172 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 5173 struct xpt_task *task; 5174 5175 xsoftc.buses_config_done = 1; 5176 xpt_unlock_buses(); 5177 /* Call manually because we don't have any buses */ 5178 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 5179 if (task != NULL) { 5180 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 5181 taskqueue_enqueue(taskqueue_thread, &task->task); 5182 } 5183 } else 5184 xpt_unlock_buses(); 5185 } 5186 5187 /* 5188 * If the given device only has one peripheral attached to it, and if that 5189 * peripheral is the passthrough driver, announce it. This insures that the 5190 * user sees some sort of announcement for every peripheral in their system. 5191 */ 5192 static int 5193 xptpassannouncefunc(struct cam_ed *device, void *arg) 5194 { 5195 struct cam_periph *periph; 5196 int i; 5197 5198 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5199 periph = SLIST_NEXT(periph, periph_links), i++); 5200 5201 periph = SLIST_FIRST(&device->periphs); 5202 if ((i == 1) 5203 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5204 xpt_announce_periph(periph, NULL); 5205 5206 return(1); 5207 } 5208 5209 static void 5210 xpt_finishconfig_task(void *context, int pending) 5211 { 5212 5213 periphdriver_init(2); 5214 /* 5215 * Check for devices with no "standard" peripheral driver 5216 * attached. For any devices like that, announce the 5217 * passthrough driver so the user will see something. 5218 */ 5219 if (!bootverbose) 5220 xpt_for_all_devices(xptpassannouncefunc, NULL); 5221 5222 /* Release our hook so that the boot can continue. */ 5223 config_intrhook_disestablish(xsoftc.xpt_config_hook); 5224 free(xsoftc.xpt_config_hook, M_CAMXPT); 5225 xsoftc.xpt_config_hook = NULL; 5226 5227 free(context, M_CAMXPT); 5228 } 5229 5230 cam_status 5231 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5232 struct cam_path *path) 5233 { 5234 struct ccb_setasync csa; 5235 cam_status status; 5236 int xptpath = 0; 5237 5238 if (path == NULL) { 5239 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5240 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5241 if (status != CAM_REQ_CMP) 5242 return (status); 5243 xpt_path_lock(path); 5244 xptpath = 1; 5245 } 5246 5247 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5248 csa.ccb_h.func_code = XPT_SASYNC_CB; 5249 csa.event_enable = event; 5250 csa.callback = cbfunc; 5251 csa.callback_arg = cbarg; 5252 xpt_action((union ccb *)&csa); 5253 status = csa.ccb_h.status; 5254 5255 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE, 5256 ("xpt_register_async: func %p\n", cbfunc)); 5257 5258 if (xptpath) { 5259 xpt_path_unlock(path); 5260 xpt_free_path(path); 5261 } 5262 5263 if ((status == CAM_REQ_CMP) && 5264 (csa.event_enable & AC_FOUND_DEVICE)) { 5265 /* 5266 * Get this peripheral up to date with all 5267 * the currently existing devices. 5268 */ 5269 xpt_for_all_devices(xptsetasyncfunc, &csa); 5270 } 5271 if ((status == CAM_REQ_CMP) && 5272 (csa.event_enable & AC_PATH_REGISTERED)) { 5273 /* 5274 * Get this peripheral up to date with all 5275 * the currently existing buses. 5276 */ 5277 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5278 } 5279 5280 return (status); 5281 } 5282 5283 static void 5284 xptaction(struct cam_sim *sim, union ccb *work_ccb) 5285 { 5286 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5287 5288 switch (work_ccb->ccb_h.func_code) { 5289 /* Common cases first */ 5290 case XPT_PATH_INQ: /* Path routing inquiry */ 5291 { 5292 struct ccb_pathinq *cpi; 5293 5294 cpi = &work_ccb->cpi; 5295 cpi->version_num = 1; /* XXX??? */ 5296 cpi->hba_inquiry = 0; 5297 cpi->target_sprt = 0; 5298 cpi->hba_misc = 0; 5299 cpi->hba_eng_cnt = 0; 5300 cpi->max_target = 0; 5301 cpi->max_lun = 0; 5302 cpi->initiator_id = 0; 5303 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5304 strlcpy(cpi->hba_vid, "", HBA_IDLEN); 5305 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5306 cpi->unit_number = sim->unit_number; 5307 cpi->bus_id = sim->bus_id; 5308 cpi->base_transfer_speed = 0; 5309 cpi->protocol = PROTO_UNSPECIFIED; 5310 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5311 cpi->transport = XPORT_UNSPECIFIED; 5312 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5313 cpi->ccb_h.status = CAM_REQ_CMP; 5314 xpt_done(work_ccb); 5315 break; 5316 } 5317 default: 5318 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5319 xpt_done(work_ccb); 5320 break; 5321 } 5322 } 5323 5324 /* 5325 * The xpt as a "controller" has no interrupt sources, so polling 5326 * is a no-op. 5327 */ 5328 static void 5329 xptpoll(struct cam_sim *sim) 5330 { 5331 } 5332 5333 void 5334 xpt_lock_buses(void) 5335 { 5336 mtx_lock(&xsoftc.xpt_topo_lock); 5337 } 5338 5339 void 5340 xpt_unlock_buses(void) 5341 { 5342 mtx_unlock(&xsoftc.xpt_topo_lock); 5343 } 5344 5345 struct mtx * 5346 xpt_path_mtx(struct cam_path *path) 5347 { 5348 5349 return (&path->device->device_mtx); 5350 } 5351 5352 static void 5353 xpt_done_process(struct ccb_hdr *ccb_h) 5354 { 5355 struct cam_sim *sim; 5356 struct cam_devq *devq; 5357 struct mtx *mtx = NULL; 5358 5359 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 5360 struct ccb_scsiio *csio; 5361 5362 if (ccb_h->func_code == XPT_SCSI_IO) { 5363 csio = &((union ccb *)ccb_h)->csio; 5364 if (csio->bio != NULL) 5365 biotrack(csio->bio, __func__); 5366 } 5367 #endif 5368 5369 if (ccb_h->flags & CAM_HIGH_POWER) { 5370 struct highpowerlist *hphead; 5371 struct cam_ed *device; 5372 5373 mtx_lock(&xsoftc.xpt_highpower_lock); 5374 hphead = &xsoftc.highpowerq; 5375 5376 device = STAILQ_FIRST(hphead); 5377 5378 /* 5379 * Increment the count since this command is done. 5380 */ 5381 xsoftc.num_highpower++; 5382 5383 /* 5384 * Any high powered commands queued up? 5385 */ 5386 if (device != NULL) { 5387 5388 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5389 mtx_unlock(&xsoftc.xpt_highpower_lock); 5390 5391 mtx_lock(&device->sim->devq->send_mtx); 5392 xpt_release_devq_device(device, 5393 /*count*/1, /*runqueue*/TRUE); 5394 mtx_unlock(&device->sim->devq->send_mtx); 5395 } else 5396 mtx_unlock(&xsoftc.xpt_highpower_lock); 5397 } 5398 5399 sim = ccb_h->path->bus->sim; 5400 5401 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5402 xpt_release_simq(sim, /*run_queue*/FALSE); 5403 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5404 } 5405 5406 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5407 && (ccb_h->status & CAM_DEV_QFRZN)) { 5408 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5409 ccb_h->status &= ~CAM_DEV_QFRZN; 5410 } 5411 5412 devq = sim->devq; 5413 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5414 struct cam_ed *dev = ccb_h->path->device; 5415 5416 mtx_lock(&devq->send_mtx); 5417 devq->send_active--; 5418 devq->send_openings++; 5419 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5420 5421 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5422 && (dev->ccbq.dev_active == 0))) { 5423 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5424 xpt_release_devq_device(dev, /*count*/1, 5425 /*run_queue*/FALSE); 5426 } 5427 5428 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5429 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5430 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5431 xpt_release_devq_device(dev, /*count*/1, 5432 /*run_queue*/FALSE); 5433 } 5434 5435 if (!device_is_queued(dev)) 5436 (void)xpt_schedule_devq(devq, dev); 5437 xpt_run_devq(devq); 5438 mtx_unlock(&devq->send_mtx); 5439 5440 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5441 mtx = xpt_path_mtx(ccb_h->path); 5442 mtx_lock(mtx); 5443 5444 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5445 && (--dev->tag_delay_count == 0)) 5446 xpt_start_tags(ccb_h->path); 5447 } 5448 } 5449 5450 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5451 if (mtx == NULL) { 5452 mtx = xpt_path_mtx(ccb_h->path); 5453 mtx_lock(mtx); 5454 } 5455 } else { 5456 if (mtx != NULL) { 5457 mtx_unlock(mtx); 5458 mtx = NULL; 5459 } 5460 } 5461 5462 /* Call the peripheral driver's callback */ 5463 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5464 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5465 if (mtx != NULL) 5466 mtx_unlock(mtx); 5467 } 5468 5469 void 5470 xpt_done_td(void *arg) 5471 { 5472 struct cam_doneq *queue = arg; 5473 struct ccb_hdr *ccb_h; 5474 STAILQ_HEAD(, ccb_hdr) doneq; 5475 5476 STAILQ_INIT(&doneq); 5477 mtx_lock(&queue->cam_doneq_mtx); 5478 while (1) { 5479 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5480 queue->cam_doneq_sleep = 1; 5481 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5482 PRIBIO, "-", 0); 5483 queue->cam_doneq_sleep = 0; 5484 } 5485 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5486 mtx_unlock(&queue->cam_doneq_mtx); 5487 5488 THREAD_NO_SLEEPING(); 5489 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5490 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5491 xpt_done_process(ccb_h); 5492 } 5493 THREAD_SLEEPING_OK(); 5494 5495 mtx_lock(&queue->cam_doneq_mtx); 5496 } 5497 } 5498 5499 static void 5500 camisr_runqueue(void) 5501 { 5502 struct ccb_hdr *ccb_h; 5503 struct cam_doneq *queue; 5504 int i; 5505 5506 /* Process global queues. */ 5507 for (i = 0; i < cam_num_doneqs; i++) { 5508 queue = &cam_doneqs[i]; 5509 mtx_lock(&queue->cam_doneq_mtx); 5510 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5511 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5512 mtx_unlock(&queue->cam_doneq_mtx); 5513 xpt_done_process(ccb_h); 5514 mtx_lock(&queue->cam_doneq_mtx); 5515 } 5516 mtx_unlock(&queue->cam_doneq_mtx); 5517 } 5518 } 5519 5520 struct kv 5521 { 5522 uint32_t v; 5523 const char *name; 5524 }; 5525 5526 static struct kv map[] = { 5527 { XPT_NOOP, "XPT_NOOP" }, 5528 { XPT_SCSI_IO, "XPT_SCSI_IO" }, 5529 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" }, 5530 { XPT_GDEVLIST, "XPT_GDEVLIST" }, 5531 { XPT_PATH_INQ, "XPT_PATH_INQ" }, 5532 { XPT_REL_SIMQ, "XPT_REL_SIMQ" }, 5533 { XPT_SASYNC_CB, "XPT_SASYNC_CB" }, 5534 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" }, 5535 { XPT_SCAN_BUS, "XPT_SCAN_BUS" }, 5536 { XPT_DEV_MATCH, "XPT_DEV_MATCH" }, 5537 { XPT_DEBUG, "XPT_DEBUG" }, 5538 { XPT_PATH_STATS, "XPT_PATH_STATS" }, 5539 { XPT_GDEV_STATS, "XPT_GDEV_STATS" }, 5540 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" }, 5541 { XPT_ASYNC, "XPT_ASYNC" }, 5542 { XPT_ABORT, "XPT_ABORT" }, 5543 { XPT_RESET_BUS, "XPT_RESET_BUS" }, 5544 { XPT_RESET_DEV, "XPT_RESET_DEV" }, 5545 { XPT_TERM_IO, "XPT_TERM_IO" }, 5546 { XPT_SCAN_LUN, "XPT_SCAN_LUN" }, 5547 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" }, 5548 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" }, 5549 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" }, 5550 { XPT_ATA_IO, "XPT_ATA_IO" }, 5551 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" }, 5552 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" }, 5553 { XPT_NVME_IO, "XPT_NVME_IO" }, 5554 { XPT_MMC_IO, "XPT_MMC_IO" }, 5555 { XPT_SMP_IO, "XPT_SMP_IO" }, 5556 { XPT_SCAN_TGT, "XPT_SCAN_TGT" }, 5557 { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" }, 5558 { XPT_ENG_INQ, "XPT_ENG_INQ" }, 5559 { XPT_ENG_EXEC, "XPT_ENG_EXEC" }, 5560 { XPT_EN_LUN, "XPT_EN_LUN" }, 5561 { XPT_TARGET_IO, "XPT_TARGET_IO" }, 5562 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" }, 5563 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" }, 5564 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" }, 5565 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" }, 5566 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" }, 5567 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" }, 5568 { 0, 0 } 5569 }; 5570 5571 const char * 5572 xpt_action_name(uint32_t action) 5573 { 5574 static char buffer[32]; /* Only for unknown messages -- racy */ 5575 struct kv *walker = map; 5576 5577 while (walker->name != NULL) { 5578 if (walker->v == action) 5579 return (walker->name); 5580 walker++; 5581 } 5582 5583 snprintf(buffer, sizeof(buffer), "%#x", action); 5584 return (buffer); 5585 } 5586