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sys/cam/cam_xpt.c
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1 /*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * 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/proc.h> 48 #include <sys/sbuf.h> 49 #include <sys/smp.h> 50 #include <sys/taskqueue.h> 51 52 #include <sys/lock.h> 53 #include <sys/mutex.h> 54 #include <sys/sysctl.h> 55 #include <sys/kthread.h> 56 57 #include <cam/cam.h> 58 #include <cam/cam_ccb.h> 59 #include <cam/cam_iosched.h> 60 #include <cam/cam_periph.h> 61 #include <cam/cam_queue.h> 62 #include <cam/cam_sim.h> 63 #include <cam/cam_xpt.h> 64 #include <cam/cam_xpt_sim.h> 65 #include <cam/cam_xpt_periph.h> 66 #include <cam/cam_xpt_internal.h> 67 #include <cam/cam_debug.h> 68 #include <cam/cam_compat.h> 69 70 #include <cam/scsi/scsi_all.h> 71 #include <cam/scsi/scsi_message.h> 72 #include <cam/scsi/scsi_pass.h> 73 74 #include <machine/stdarg.h> /* for xpt_print below */ 75 76 #include "opt_cam.h" 77 78 /* Wild guess based on not wanting to grow the stack too much */ 79 #define XPT_PRINT_MAXLEN 512 80 #ifdef PRINTF_BUFR_SIZE 81 #define XPT_PRINT_LEN PRINTF_BUFR_SIZE 82 #else 83 #define XPT_PRINT_LEN 128 84 #endif 85 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large"); 86 87 /* 88 * This is the maximum number of high powered commands (e.g. start unit) 89 * that can be outstanding at a particular time. 90 */ 91 #ifndef CAM_MAX_HIGHPOWER 92 #define CAM_MAX_HIGHPOWER 4 93 #endif 94 95 /* Datastructures internal to the xpt layer */ 96 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 97 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 98 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 99 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 100 101 struct xpt_softc { 102 uint32_t xpt_generation; 103 104 /* number of high powered commands that can go through right now */ 105 struct mtx xpt_highpower_lock; 106 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 107 int num_highpower; 108 109 /* queue for handling async rescan requests. */ 110 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 111 int buses_to_config; 112 int buses_config_done; 113 int announce_nosbuf; 114 115 /* 116 * Registered buses 117 * 118 * N.B., "busses" is an archaic spelling of "buses". In new code 119 * "buses" is preferred. 120 */ 121 TAILQ_HEAD(,cam_eb) xpt_busses; 122 u_int bus_generation; 123 124 int boot_delay; 125 struct callout boot_callout; 126 struct task boot_task; 127 struct root_hold_token xpt_rootmount; 128 129 struct mtx xpt_topo_lock; 130 struct taskqueue *xpt_taskq; 131 }; 132 133 typedef enum { 134 DM_RET_COPY = 0x01, 135 DM_RET_FLAG_MASK = 0x0f, 136 DM_RET_NONE = 0x00, 137 DM_RET_STOP = 0x10, 138 DM_RET_DESCEND = 0x20, 139 DM_RET_ERROR = 0x30, 140 DM_RET_ACTION_MASK = 0xf0 141 } dev_match_ret; 142 143 typedef enum { 144 XPT_DEPTH_BUS, 145 XPT_DEPTH_TARGET, 146 XPT_DEPTH_DEVICE, 147 XPT_DEPTH_PERIPH 148 } xpt_traverse_depth; 149 150 struct xpt_traverse_config { 151 xpt_traverse_depth depth; 152 void *tr_func; 153 void *tr_arg; 154 }; 155 156 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 157 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 158 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 159 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 160 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 161 162 /* Transport layer configuration information */ 163 static struct xpt_softc xsoftc; 164 165 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF); 166 167 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 168 &xsoftc.boot_delay, 0, "Bus registration wait time"); 169 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD, 170 &xsoftc.xpt_generation, 0, "CAM peripheral generation count"); 171 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN, 172 &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements"); 173 174 struct cam_doneq { 175 struct mtx_padalign cam_doneq_mtx; 176 STAILQ_HEAD(, ccb_hdr) cam_doneq; 177 int cam_doneq_sleep; 178 }; 179 180 static struct cam_doneq cam_doneqs[MAXCPU]; 181 static u_int __read_mostly cam_num_doneqs; 182 static struct proc *cam_proc; 183 184 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 185 &cam_num_doneqs, 0, "Number of completion queues/threads"); 186 187 struct cam_periph *xpt_periph; 188 189 static periph_init_t xpt_periph_init; 190 191 static struct periph_driver xpt_driver = 192 { 193 xpt_periph_init, "xpt", 194 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 195 CAM_PERIPH_DRV_EARLY 196 }; 197 198 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 199 200 static d_open_t xptopen; 201 static d_close_t xptclose; 202 static d_ioctl_t xptioctl; 203 static d_ioctl_t xptdoioctl; 204 205 static struct cdevsw xpt_cdevsw = { 206 .d_version = D_VERSION, 207 .d_flags = 0, 208 .d_open = xptopen, 209 .d_close = xptclose, 210 .d_ioctl = xptioctl, 211 .d_name = "xpt", 212 }; 213 214 /* Storage for debugging datastructures */ 215 struct cam_path *cam_dpath; 216 u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS; 217 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN, 218 &cam_dflags, 0, "Enabled debug flags"); 219 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 220 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN, 221 &cam_debug_delay, 0, "Delay in us after each debug message"); 222 223 /* Our boot-time initialization hook */ 224 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 225 226 static moduledata_t cam_moduledata = { 227 "cam", 228 cam_module_event_handler, 229 NULL 230 }; 231 232 static int xpt_init(void *); 233 234 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 235 MODULE_VERSION(cam, 1); 236 237 static void xpt_async_bcast(struct async_list *async_head, 238 u_int32_t async_code, 239 struct cam_path *path, 240 void *async_arg); 241 static path_id_t xptnextfreepathid(void); 242 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 243 static union ccb *xpt_get_ccb(struct cam_periph *periph); 244 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 245 static void xpt_run_allocq(struct cam_periph *periph, int sleep); 246 static void xpt_run_allocq_task(void *context, int pending); 247 static void xpt_run_devq(struct cam_devq *devq); 248 static callout_func_t xpt_release_devq_timeout; 249 static void xpt_acquire_bus(struct cam_eb *bus); 250 static void xpt_release_bus(struct cam_eb *bus); 251 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 252 static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 253 int run_queue); 254 static struct cam_et* 255 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 256 static void xpt_acquire_target(struct cam_et *target); 257 static void xpt_release_target(struct cam_et *target); 258 static struct cam_eb* 259 xpt_find_bus(path_id_t path_id); 260 static struct cam_et* 261 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 262 static struct cam_ed* 263 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 264 static void xpt_config(void *arg); 265 static void xpt_hold_boot_locked(void); 266 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 267 u_int32_t new_priority); 268 static xpt_devicefunc_t xptpassannouncefunc; 269 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 270 static void xptpoll(struct cam_sim *sim); 271 static void camisr_runqueue(void); 272 static void xpt_done_process(struct ccb_hdr *ccb_h); 273 static void xpt_done_td(void *); 274 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 275 u_int num_patterns, struct cam_eb *bus); 276 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 277 u_int num_patterns, 278 struct cam_ed *device); 279 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 280 u_int num_patterns, 281 struct cam_periph *periph); 282 static xpt_busfunc_t xptedtbusfunc; 283 static xpt_targetfunc_t xptedttargetfunc; 284 static xpt_devicefunc_t xptedtdevicefunc; 285 static xpt_periphfunc_t xptedtperiphfunc; 286 static xpt_pdrvfunc_t xptplistpdrvfunc; 287 static xpt_periphfunc_t xptplistperiphfunc; 288 static int xptedtmatch(struct ccb_dev_match *cdm); 289 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 290 static int xptbustraverse(struct cam_eb *start_bus, 291 xpt_busfunc_t *tr_func, void *arg); 292 static int xpttargettraverse(struct cam_eb *bus, 293 struct cam_et *start_target, 294 xpt_targetfunc_t *tr_func, void *arg); 295 static int xptdevicetraverse(struct cam_et *target, 296 struct cam_ed *start_device, 297 xpt_devicefunc_t *tr_func, void *arg); 298 static int xptperiphtraverse(struct cam_ed *device, 299 struct cam_periph *start_periph, 300 xpt_periphfunc_t *tr_func, void *arg); 301 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 302 xpt_pdrvfunc_t *tr_func, void *arg); 303 static int xptpdperiphtraverse(struct periph_driver **pdrv, 304 struct cam_periph *start_periph, 305 xpt_periphfunc_t *tr_func, 306 void *arg); 307 static xpt_busfunc_t xptdefbusfunc; 308 static xpt_targetfunc_t xptdeftargetfunc; 309 static xpt_devicefunc_t xptdefdevicefunc; 310 static xpt_periphfunc_t xptdefperiphfunc; 311 static void xpt_finishconfig_task(void *context, int pending); 312 static void xpt_dev_async_default(u_int32_t async_code, 313 struct cam_eb *bus, 314 struct cam_et *target, 315 struct cam_ed *device, 316 void *async_arg); 317 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 318 struct cam_et *target, 319 lun_id_t lun_id); 320 static xpt_devicefunc_t xptsetasyncfunc; 321 static xpt_busfunc_t xptsetasyncbusfunc; 322 static cam_status xptregister(struct cam_periph *periph, 323 void *arg); 324 325 static __inline int 326 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 327 { 328 int retval; 329 330 mtx_assert(&devq->send_mtx, MA_OWNED); 331 if ((dev->ccbq.queue.entries > 0) && 332 (dev->ccbq.dev_openings > 0) && 333 (dev->ccbq.queue.qfrozen_cnt == 0)) { 334 /* 335 * The priority of a device waiting for controller 336 * resources is that of the highest priority CCB 337 * enqueued. 338 */ 339 retval = 340 xpt_schedule_dev(&devq->send_queue, 341 &dev->devq_entry, 342 CAMQ_GET_PRIO(&dev->ccbq.queue)); 343 } else { 344 retval = 0; 345 } 346 return (retval); 347 } 348 349 static __inline int 350 device_is_queued(struct cam_ed *device) 351 { 352 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 353 } 354 355 static void 356 xpt_periph_init(void) 357 { 358 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 359 } 360 361 static int 362 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 363 { 364 365 /* 366 * Only allow read-write access. 367 */ 368 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 369 return(EPERM); 370 371 /* 372 * We don't allow nonblocking access. 373 */ 374 if ((flags & O_NONBLOCK) != 0) { 375 printf("%s: can't do nonblocking access\n", devtoname(dev)); 376 return(ENODEV); 377 } 378 379 return(0); 380 } 381 382 static int 383 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 384 { 385 386 return(0); 387 } 388 389 /* 390 * Don't automatically grab the xpt softc lock here even though this is going 391 * through the xpt device. The xpt device is really just a back door for 392 * accessing other devices and SIMs, so the right thing to do is to grab 393 * the appropriate SIM lock once the bus/SIM is located. 394 */ 395 static int 396 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 397 { 398 int error; 399 400 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 401 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 402 } 403 return (error); 404 } 405 406 static int 407 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 408 { 409 int error; 410 411 error = 0; 412 413 switch(cmd) { 414 /* 415 * For the transport layer CAMIOCOMMAND ioctl, we really only want 416 * to accept CCB types that don't quite make sense to send through a 417 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 418 * in the CAM spec. 419 */ 420 case CAMIOCOMMAND: { 421 union ccb *ccb; 422 union ccb *inccb; 423 struct cam_eb *bus; 424 425 inccb = (union ccb *)addr; 426 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 427 if (inccb->ccb_h.func_code == XPT_SCSI_IO) 428 inccb->csio.bio = NULL; 429 #endif 430 431 if (inccb->ccb_h.flags & CAM_UNLOCKED) 432 return (EINVAL); 433 434 bus = xpt_find_bus(inccb->ccb_h.path_id); 435 if (bus == NULL) 436 return (EINVAL); 437 438 switch (inccb->ccb_h.func_code) { 439 case XPT_SCAN_BUS: 440 case XPT_RESET_BUS: 441 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 442 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 443 xpt_release_bus(bus); 444 return (EINVAL); 445 } 446 break; 447 case XPT_SCAN_TGT: 448 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 449 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 450 xpt_release_bus(bus); 451 return (EINVAL); 452 } 453 break; 454 default: 455 break; 456 } 457 458 switch(inccb->ccb_h.func_code) { 459 case XPT_SCAN_BUS: 460 case XPT_RESET_BUS: 461 case XPT_PATH_INQ: 462 case XPT_ENG_INQ: 463 case XPT_SCAN_LUN: 464 case XPT_SCAN_TGT: 465 466 ccb = xpt_alloc_ccb(); 467 468 /* 469 * Create a path using the bus, target, and lun the 470 * user passed in. 471 */ 472 if (xpt_create_path(&ccb->ccb_h.path, NULL, 473 inccb->ccb_h.path_id, 474 inccb->ccb_h.target_id, 475 inccb->ccb_h.target_lun) != 476 CAM_REQ_CMP){ 477 error = EINVAL; 478 xpt_free_ccb(ccb); 479 break; 480 } 481 /* Ensure all of our fields are correct */ 482 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 483 inccb->ccb_h.pinfo.priority); 484 xpt_merge_ccb(ccb, inccb); 485 xpt_path_lock(ccb->ccb_h.path); 486 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 487 xpt_path_unlock(ccb->ccb_h.path); 488 bcopy(ccb, inccb, sizeof(union ccb)); 489 xpt_free_path(ccb->ccb_h.path); 490 xpt_free_ccb(ccb); 491 break; 492 493 case XPT_DEBUG: { 494 union ccb ccb; 495 496 /* 497 * This is an immediate CCB, so it's okay to 498 * allocate it on the stack. 499 */ 500 501 /* 502 * Create a path using the bus, target, and lun the 503 * user passed in. 504 */ 505 if (xpt_create_path(&ccb.ccb_h.path, NULL, 506 inccb->ccb_h.path_id, 507 inccb->ccb_h.target_id, 508 inccb->ccb_h.target_lun) != 509 CAM_REQ_CMP){ 510 error = EINVAL; 511 break; 512 } 513 /* Ensure all of our fields are correct */ 514 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 515 inccb->ccb_h.pinfo.priority); 516 xpt_merge_ccb(&ccb, inccb); 517 xpt_action(&ccb); 518 bcopy(&ccb, inccb, sizeof(union ccb)); 519 xpt_free_path(ccb.ccb_h.path); 520 break; 521 } 522 case XPT_DEV_MATCH: { 523 struct cam_periph_map_info mapinfo; 524 struct cam_path *old_path; 525 526 /* 527 * We can't deal with physical addresses for this 528 * type of transaction. 529 */ 530 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 531 CAM_DATA_VADDR) { 532 error = EINVAL; 533 break; 534 } 535 536 /* 537 * Save this in case the caller had it set to 538 * something in particular. 539 */ 540 old_path = inccb->ccb_h.path; 541 542 /* 543 * We really don't need a path for the matching 544 * code. The path is needed because of the 545 * debugging statements in xpt_action(). They 546 * assume that the CCB has a valid path. 547 */ 548 inccb->ccb_h.path = xpt_periph->path; 549 550 bzero(&mapinfo, sizeof(mapinfo)); 551 552 /* 553 * Map the pattern and match buffers into kernel 554 * virtual address space. 555 */ 556 error = cam_periph_mapmem(inccb, &mapinfo, maxphys); 557 558 if (error) { 559 inccb->ccb_h.path = old_path; 560 break; 561 } 562 563 /* 564 * This is an immediate CCB, we can send it on directly. 565 */ 566 xpt_action(inccb); 567 568 /* 569 * Map the buffers back into user space. 570 */ 571 cam_periph_unmapmem(inccb, &mapinfo); 572 573 inccb->ccb_h.path = old_path; 574 575 error = 0; 576 break; 577 } 578 default: 579 error = ENOTSUP; 580 break; 581 } 582 xpt_release_bus(bus); 583 break; 584 } 585 /* 586 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 587 * with the periphal driver name and unit name filled in. The other 588 * fields don't really matter as input. The passthrough driver name 589 * ("pass"), and unit number are passed back in the ccb. The current 590 * device generation number, and the index into the device peripheral 591 * driver list, and the status are also passed back. Note that 592 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 593 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 594 * (or rather should be) impossible for the device peripheral driver 595 * list to change since we look at the whole thing in one pass, and 596 * we do it with lock protection. 597 * 598 */ 599 case CAMGETPASSTHRU: { 600 union ccb *ccb; 601 struct cam_periph *periph; 602 struct periph_driver **p_drv; 603 char *name; 604 u_int unit; 605 int base_periph_found; 606 607 ccb = (union ccb *)addr; 608 unit = ccb->cgdl.unit_number; 609 name = ccb->cgdl.periph_name; 610 base_periph_found = 0; 611 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 612 if (ccb->ccb_h.func_code == XPT_SCSI_IO) 613 ccb->csio.bio = NULL; 614 #endif 615 616 /* 617 * Sanity check -- make sure we don't get a null peripheral 618 * driver name. 619 */ 620 if (*ccb->cgdl.periph_name == '\0') { 621 error = EINVAL; 622 break; 623 } 624 625 /* Keep the list from changing while we traverse it */ 626 xpt_lock_buses(); 627 628 /* first find our driver in the list of drivers */ 629 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 630 if (strcmp((*p_drv)->driver_name, name) == 0) 631 break; 632 633 if (*p_drv == NULL) { 634 xpt_unlock_buses(); 635 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 636 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 637 *ccb->cgdl.periph_name = '\0'; 638 ccb->cgdl.unit_number = 0; 639 error = ENOENT; 640 break; 641 } 642 643 /* 644 * Run through every peripheral instance of this driver 645 * and check to see whether it matches the unit passed 646 * in by the user. If it does, get out of the loops and 647 * find the passthrough driver associated with that 648 * peripheral driver. 649 */ 650 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 651 periph = TAILQ_NEXT(periph, unit_links)) { 652 if (periph->unit_number == unit) 653 break; 654 } 655 /* 656 * If we found the peripheral driver that the user passed 657 * in, go through all of the peripheral drivers for that 658 * particular device and look for a passthrough driver. 659 */ 660 if (periph != NULL) { 661 struct cam_ed *device; 662 int i; 663 664 base_periph_found = 1; 665 device = periph->path->device; 666 for (i = 0, periph = SLIST_FIRST(&device->periphs); 667 periph != NULL; 668 periph = SLIST_NEXT(periph, periph_links), i++) { 669 /* 670 * Check to see whether we have a 671 * passthrough device or not. 672 */ 673 if (strcmp(periph->periph_name, "pass") == 0) { 674 /* 675 * Fill in the getdevlist fields. 676 */ 677 strlcpy(ccb->cgdl.periph_name, 678 periph->periph_name, 679 sizeof(ccb->cgdl.periph_name)); 680 ccb->cgdl.unit_number = 681 periph->unit_number; 682 if (SLIST_NEXT(periph, periph_links)) 683 ccb->cgdl.status = 684 CAM_GDEVLIST_MORE_DEVS; 685 else 686 ccb->cgdl.status = 687 CAM_GDEVLIST_LAST_DEVICE; 688 ccb->cgdl.generation = 689 device->generation; 690 ccb->cgdl.index = i; 691 /* 692 * Fill in some CCB header fields 693 * that the user may want. 694 */ 695 ccb->ccb_h.path_id = 696 periph->path->bus->path_id; 697 ccb->ccb_h.target_id = 698 periph->path->target->target_id; 699 ccb->ccb_h.target_lun = 700 periph->path->device->lun_id; 701 ccb->ccb_h.status = CAM_REQ_CMP; 702 break; 703 } 704 } 705 } 706 707 /* 708 * If the periph is null here, one of two things has 709 * happened. The first possibility is that we couldn't 710 * find the unit number of the particular peripheral driver 711 * that the user is asking about. e.g. the user asks for 712 * the passthrough driver for "da11". We find the list of 713 * "da" peripherals all right, but there is no unit 11. 714 * The other possibility is that we went through the list 715 * of peripheral drivers attached to the device structure, 716 * but didn't find one with the name "pass". Either way, 717 * we return ENOENT, since we couldn't find something. 718 */ 719 if (periph == NULL) { 720 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 721 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 722 *ccb->cgdl.periph_name = '\0'; 723 ccb->cgdl.unit_number = 0; 724 error = ENOENT; 725 /* 726 * It is unfortunate that this is even necessary, 727 * but there are many, many clueless users out there. 728 * If this is true, the user is looking for the 729 * passthrough driver, but doesn't have one in his 730 * kernel. 731 */ 732 if (base_periph_found == 1) { 733 printf("xptioctl: pass driver is not in the " 734 "kernel\n"); 735 printf("xptioctl: put \"device pass\" in " 736 "your kernel config file\n"); 737 } 738 } 739 xpt_unlock_buses(); 740 break; 741 } 742 default: 743 error = ENOTTY; 744 break; 745 } 746 747 return(error); 748 } 749 750 static int 751 cam_module_event_handler(module_t mod, int what, void *arg) 752 { 753 int error; 754 755 switch (what) { 756 case MOD_LOAD: 757 if ((error = xpt_init(NULL)) != 0) 758 return (error); 759 break; 760 case MOD_UNLOAD: 761 return EBUSY; 762 default: 763 return EOPNOTSUPP; 764 } 765 766 return 0; 767 } 768 769 static struct xpt_proto * 770 xpt_proto_find(cam_proto proto) 771 { 772 struct xpt_proto **pp; 773 774 SET_FOREACH(pp, cam_xpt_proto_set) { 775 if ((*pp)->proto == proto) 776 return *pp; 777 } 778 779 return NULL; 780 } 781 782 static void 783 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 784 { 785 786 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 787 xpt_free_path(done_ccb->ccb_h.path); 788 xpt_free_ccb(done_ccb); 789 } else { 790 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 791 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 792 } 793 xpt_release_boot(); 794 } 795 796 /* thread to handle bus rescans */ 797 static void 798 xpt_scanner_thread(void *dummy) 799 { 800 union ccb *ccb; 801 struct mtx *mtx; 802 struct cam_ed *device; 803 804 xpt_lock_buses(); 805 for (;;) { 806 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 807 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 808 "-", 0); 809 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 810 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 811 xpt_unlock_buses(); 812 813 /* 814 * We need to lock the device's mutex which we use as 815 * the path mutex. We can't do it directly because the 816 * cam_path in the ccb may wind up going away because 817 * the path lock may be dropped and the path retired in 818 * the completion callback. We do this directly to keep 819 * the reference counts in cam_path sane. We also have 820 * to copy the device pointer because ccb_h.path may 821 * be freed in the callback. 822 */ 823 mtx = xpt_path_mtx(ccb->ccb_h.path); 824 device = ccb->ccb_h.path->device; 825 xpt_acquire_device(device); 826 mtx_lock(mtx); 827 xpt_action(ccb); 828 mtx_unlock(mtx); 829 xpt_release_device(device); 830 831 xpt_lock_buses(); 832 } 833 } 834 } 835 836 void 837 xpt_rescan(union ccb *ccb) 838 { 839 struct ccb_hdr *hdr; 840 841 /* Prepare request */ 842 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 843 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 844 ccb->ccb_h.func_code = XPT_SCAN_BUS; 845 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 846 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 847 ccb->ccb_h.func_code = XPT_SCAN_TGT; 848 else 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_LUN; 851 else { 852 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 853 xpt_free_path(ccb->ccb_h.path); 854 xpt_free_ccb(ccb); 855 return; 856 } 857 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 858 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code, 859 xpt_action_name(ccb->ccb_h.func_code))); 860 861 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 862 ccb->ccb_h.cbfcnp = xpt_rescan_done; 863 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 864 /* Don't make duplicate entries for the same paths. */ 865 xpt_lock_buses(); 866 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 867 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 868 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 869 wakeup(&xsoftc.ccb_scanq); 870 xpt_unlock_buses(); 871 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 872 xpt_free_path(ccb->ccb_h.path); 873 xpt_free_ccb(ccb); 874 return; 875 } 876 } 877 } 878 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 879 xpt_hold_boot_locked(); 880 wakeup(&xsoftc.ccb_scanq); 881 xpt_unlock_buses(); 882 } 883 884 /* Functions accessed by the peripheral drivers */ 885 static int 886 xpt_init(void *dummy) 887 { 888 struct cam_sim *xpt_sim; 889 struct cam_path *path; 890 struct cam_devq *devq; 891 cam_status status; 892 int error, i; 893 894 TAILQ_INIT(&xsoftc.xpt_busses); 895 TAILQ_INIT(&xsoftc.ccb_scanq); 896 STAILQ_INIT(&xsoftc.highpowerq); 897 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 898 899 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 900 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 901 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 902 903 #ifdef CAM_BOOT_DELAY 904 /* 905 * Override this value at compile time to assist our users 906 * who don't use loader to boot a kernel. 907 */ 908 xsoftc.boot_delay = CAM_BOOT_DELAY; 909 #endif 910 911 /* 912 * The xpt layer is, itself, the equivalent of a SIM. 913 * Allow 16 ccbs in the ccb pool for it. This should 914 * give decent parallelism when we probe buses and 915 * perform other XPT functions. 916 */ 917 devq = cam_simq_alloc(16); 918 xpt_sim = cam_sim_alloc(xptaction, 919 xptpoll, 920 "xpt", 921 /*softc*/NULL, 922 /*unit*/0, 923 /*mtx*/NULL, 924 /*max_dev_transactions*/0, 925 /*max_tagged_dev_transactions*/0, 926 devq); 927 if (xpt_sim == NULL) 928 return (ENOMEM); 929 930 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 931 printf("xpt_init: xpt_bus_register failed with status %#x," 932 " failing attach\n", status); 933 return (EINVAL); 934 } 935 936 /* 937 * Looking at the XPT from the SIM layer, the XPT is 938 * the equivalent of a peripheral driver. Allocate 939 * a peripheral driver entry for us. 940 */ 941 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 942 CAM_TARGET_WILDCARD, 943 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 944 printf("xpt_init: xpt_create_path failed with status %#x," 945 " failing attach\n", status); 946 return (EINVAL); 947 } 948 xpt_path_lock(path); 949 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 950 path, NULL, 0, xpt_sim); 951 xpt_path_unlock(path); 952 xpt_free_path(path); 953 954 if (cam_num_doneqs < 1) 955 cam_num_doneqs = 1 + mp_ncpus / 6; 956 else if (cam_num_doneqs > MAXCPU) 957 cam_num_doneqs = MAXCPU; 958 for (i = 0; i < cam_num_doneqs; i++) { 959 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 960 MTX_DEF); 961 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 962 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 963 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 964 if (error != 0) { 965 cam_num_doneqs = i; 966 break; 967 } 968 } 969 if (cam_num_doneqs < 1) { 970 printf("xpt_init: Cannot init completion queues " 971 "- failing attach\n"); 972 return (ENOMEM); 973 } 974 975 /* 976 * Register a callback for when interrupts are enabled. 977 */ 978 config_intrhook_oneshot(xpt_config, NULL); 979 980 return (0); 981 } 982 983 static cam_status 984 xptregister(struct cam_periph *periph, void *arg) 985 { 986 struct cam_sim *xpt_sim; 987 988 if (periph == NULL) { 989 printf("xptregister: periph was NULL!!\n"); 990 return(CAM_REQ_CMP_ERR); 991 } 992 993 xpt_sim = (struct cam_sim *)arg; 994 xpt_sim->softc = periph; 995 xpt_periph = periph; 996 periph->softc = NULL; 997 998 return(CAM_REQ_CMP); 999 } 1000 1001 int32_t 1002 xpt_add_periph(struct cam_periph *periph) 1003 { 1004 struct cam_ed *device; 1005 int32_t status; 1006 1007 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 1008 device = periph->path->device; 1009 status = CAM_REQ_CMP; 1010 if (device != NULL) { 1011 mtx_lock(&device->target->bus->eb_mtx); 1012 device->generation++; 1013 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 1014 mtx_unlock(&device->target->bus->eb_mtx); 1015 atomic_add_32(&xsoftc.xpt_generation, 1); 1016 } 1017 1018 return (status); 1019 } 1020 1021 void 1022 xpt_remove_periph(struct cam_periph *periph) 1023 { 1024 struct cam_ed *device; 1025 1026 device = periph->path->device; 1027 if (device != NULL) { 1028 mtx_lock(&device->target->bus->eb_mtx); 1029 device->generation++; 1030 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 1031 mtx_unlock(&device->target->bus->eb_mtx); 1032 atomic_add_32(&xsoftc.xpt_generation, 1); 1033 } 1034 } 1035 1036 void 1037 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1038 { 1039 struct cam_path *path = periph->path; 1040 struct xpt_proto *proto; 1041 1042 cam_periph_assert(periph, MA_OWNED); 1043 periph->flags |= CAM_PERIPH_ANNOUNCED; 1044 1045 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1046 periph->periph_name, periph->unit_number, 1047 path->bus->sim->sim_name, 1048 path->bus->sim->unit_number, 1049 path->bus->sim->bus_id, 1050 path->bus->path_id, 1051 path->target->target_id, 1052 (uintmax_t)path->device->lun_id); 1053 printf("%s%d: ", periph->periph_name, periph->unit_number); 1054 proto = xpt_proto_find(path->device->protocol); 1055 if (proto) 1056 proto->ops->announce(path->device); 1057 else 1058 printf("%s%d: Unknown protocol device %d\n", 1059 periph->periph_name, periph->unit_number, 1060 path->device->protocol); 1061 if (path->device->serial_num_len > 0) { 1062 /* Don't wrap the screen - print only the first 60 chars */ 1063 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1064 periph->unit_number, path->device->serial_num); 1065 } 1066 /* Announce transport details. */ 1067 path->bus->xport->ops->announce(periph); 1068 /* Announce command queueing. */ 1069 if (path->device->inq_flags & SID_CmdQue 1070 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1071 printf("%s%d: Command Queueing enabled\n", 1072 periph->periph_name, periph->unit_number); 1073 } 1074 /* Announce caller's details if they've passed in. */ 1075 if (announce_string != NULL) 1076 printf("%s%d: %s\n", periph->periph_name, 1077 periph->unit_number, announce_string); 1078 } 1079 1080 void 1081 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb, 1082 char *announce_string) 1083 { 1084 struct cam_path *path = periph->path; 1085 struct xpt_proto *proto; 1086 1087 cam_periph_assert(periph, MA_OWNED); 1088 periph->flags |= CAM_PERIPH_ANNOUNCED; 1089 1090 /* Fall back to the non-sbuf method if necessary */ 1091 if (xsoftc.announce_nosbuf != 0) { 1092 xpt_announce_periph(periph, announce_string); 1093 return; 1094 } 1095 proto = xpt_proto_find(path->device->protocol); 1096 if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) || 1097 (path->bus->xport->ops->announce_sbuf == NULL)) { 1098 xpt_announce_periph(periph, announce_string); 1099 return; 1100 } 1101 1102 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1103 periph->periph_name, periph->unit_number, 1104 path->bus->sim->sim_name, 1105 path->bus->sim->unit_number, 1106 path->bus->sim->bus_id, 1107 path->bus->path_id, 1108 path->target->target_id, 1109 (uintmax_t)path->device->lun_id); 1110 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number); 1111 1112 if (proto) 1113 proto->ops->announce_sbuf(path->device, sb); 1114 else 1115 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n", 1116 periph->periph_name, periph->unit_number, 1117 path->device->protocol); 1118 if (path->device->serial_num_len > 0) { 1119 /* Don't wrap the screen - print only the first 60 chars */ 1120 sbuf_printf(sb, "%s%d: Serial Number %.60s\n", 1121 periph->periph_name, periph->unit_number, 1122 path->device->serial_num); 1123 } 1124 /* Announce transport details. */ 1125 path->bus->xport->ops->announce_sbuf(periph, sb); 1126 /* Announce command queueing. */ 1127 if (path->device->inq_flags & SID_CmdQue 1128 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1129 sbuf_printf(sb, "%s%d: Command Queueing enabled\n", 1130 periph->periph_name, periph->unit_number); 1131 } 1132 /* Announce caller's details if they've passed in. */ 1133 if (announce_string != NULL) 1134 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name, 1135 periph->unit_number, announce_string); 1136 } 1137 1138 void 1139 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1140 { 1141 if (quirks != 0) { 1142 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1143 periph->unit_number, quirks, bit_string); 1144 } 1145 } 1146 1147 void 1148 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb, 1149 int quirks, char *bit_string) 1150 { 1151 if (xsoftc.announce_nosbuf != 0) { 1152 xpt_announce_quirks(periph, quirks, bit_string); 1153 return; 1154 } 1155 1156 if (quirks != 0) { 1157 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name, 1158 periph->unit_number, quirks, bit_string); 1159 } 1160 } 1161 1162 void 1163 xpt_denounce_periph(struct cam_periph *periph) 1164 { 1165 struct cam_path *path = periph->path; 1166 struct xpt_proto *proto; 1167 1168 cam_periph_assert(periph, MA_OWNED); 1169 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1170 periph->periph_name, periph->unit_number, 1171 path->bus->sim->sim_name, 1172 path->bus->sim->unit_number, 1173 path->bus->sim->bus_id, 1174 path->bus->path_id, 1175 path->target->target_id, 1176 (uintmax_t)path->device->lun_id); 1177 printf("%s%d: ", periph->periph_name, periph->unit_number); 1178 proto = xpt_proto_find(path->device->protocol); 1179 if (proto) 1180 proto->ops->denounce(path->device); 1181 else 1182 printf("%s%d: Unknown protocol device %d\n", 1183 periph->periph_name, periph->unit_number, 1184 path->device->protocol); 1185 if (path->device->serial_num_len > 0) 1186 printf(" s/n %.60s", path->device->serial_num); 1187 printf(" detached\n"); 1188 } 1189 1190 void 1191 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb) 1192 { 1193 struct cam_path *path = periph->path; 1194 struct xpt_proto *proto; 1195 1196 cam_periph_assert(periph, MA_OWNED); 1197 1198 /* Fall back to the non-sbuf method if necessary */ 1199 if (xsoftc.announce_nosbuf != 0) { 1200 xpt_denounce_periph(periph); 1201 return; 1202 } 1203 proto = xpt_proto_find(path->device->protocol); 1204 if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) { 1205 xpt_denounce_periph(periph); 1206 return; 1207 } 1208 1209 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1210 periph->periph_name, periph->unit_number, 1211 path->bus->sim->sim_name, 1212 path->bus->sim->unit_number, 1213 path->bus->sim->bus_id, 1214 path->bus->path_id, 1215 path->target->target_id, 1216 (uintmax_t)path->device->lun_id); 1217 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number); 1218 1219 if (proto) 1220 proto->ops->denounce_sbuf(path->device, sb); 1221 else 1222 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n", 1223 periph->periph_name, periph->unit_number, 1224 path->device->protocol); 1225 if (path->device->serial_num_len > 0) 1226 sbuf_printf(sb, " s/n %.60s", path->device->serial_num); 1227 sbuf_printf(sb, " detached\n"); 1228 } 1229 1230 int 1231 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1232 { 1233 int ret = -1, l, o; 1234 struct ccb_dev_advinfo cdai; 1235 struct scsi_vpd_device_id *did; 1236 struct scsi_vpd_id_descriptor *idd; 1237 1238 xpt_path_assert(path, MA_OWNED); 1239 1240 memset(&cdai, 0, sizeof(cdai)); 1241 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1242 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1243 cdai.flags = CDAI_FLAG_NONE; 1244 cdai.bufsiz = len; 1245 cdai.buf = buf; 1246 1247 if (!strcmp(attr, "GEOM::ident")) 1248 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1249 else if (!strcmp(attr, "GEOM::physpath")) 1250 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1251 else if (strcmp(attr, "GEOM::lunid") == 0 || 1252 strcmp(attr, "GEOM::lunname") == 0) { 1253 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1254 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1255 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT); 1256 if (cdai.buf == NULL) { 1257 ret = ENOMEM; 1258 goto out; 1259 } 1260 } else 1261 goto out; 1262 1263 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1264 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1265 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1266 if (cdai.provsiz == 0) 1267 goto out; 1268 switch(cdai.buftype) { 1269 case CDAI_TYPE_SCSI_DEVID: 1270 did = (struct scsi_vpd_device_id *)cdai.buf; 1271 if (strcmp(attr, "GEOM::lunid") == 0) { 1272 idd = scsi_get_devid(did, cdai.provsiz, 1273 scsi_devid_is_lun_naa); 1274 if (idd == NULL) 1275 idd = scsi_get_devid(did, cdai.provsiz, 1276 scsi_devid_is_lun_eui64); 1277 if (idd == NULL) 1278 idd = scsi_get_devid(did, cdai.provsiz, 1279 scsi_devid_is_lun_uuid); 1280 if (idd == NULL) 1281 idd = scsi_get_devid(did, cdai.provsiz, 1282 scsi_devid_is_lun_md5); 1283 } else 1284 idd = NULL; 1285 1286 if (idd == NULL) 1287 idd = scsi_get_devid(did, cdai.provsiz, 1288 scsi_devid_is_lun_t10); 1289 if (idd == NULL) 1290 idd = scsi_get_devid(did, cdai.provsiz, 1291 scsi_devid_is_lun_name); 1292 if (idd == NULL) 1293 break; 1294 1295 ret = 0; 1296 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == 1297 SVPD_ID_CODESET_ASCII) { 1298 if (idd->length < len) { 1299 for (l = 0; l < idd->length; l++) 1300 buf[l] = idd->identifier[l] ? 1301 idd->identifier[l] : ' '; 1302 buf[l] = 0; 1303 } else 1304 ret = EFAULT; 1305 break; 1306 } 1307 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == 1308 SVPD_ID_CODESET_UTF8) { 1309 l = strnlen(idd->identifier, idd->length); 1310 if (l < len) { 1311 bcopy(idd->identifier, buf, l); 1312 buf[l] = 0; 1313 } else 1314 ret = EFAULT; 1315 break; 1316 } 1317 if ((idd->id_type & SVPD_ID_TYPE_MASK) == 1318 SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) { 1319 if ((idd->length - 2) * 2 + 4 >= len) { 1320 ret = EFAULT; 1321 break; 1322 } 1323 for (l = 2, o = 0; l < idd->length; l++) { 1324 if (l == 6 || l == 8 || l == 10 || l == 12) 1325 o += sprintf(buf + o, "-"); 1326 o += sprintf(buf + o, "%02x", 1327 idd->identifier[l]); 1328 } 1329 break; 1330 } 1331 if (idd->length * 2 < len) { 1332 for (l = 0; l < idd->length; l++) 1333 sprintf(buf + l * 2, "%02x", 1334 idd->identifier[l]); 1335 } else 1336 ret = EFAULT; 1337 break; 1338 default: 1339 if (cdai.provsiz < len) { 1340 cdai.buf[cdai.provsiz] = 0; 1341 ret = 0; 1342 } else 1343 ret = EFAULT; 1344 break; 1345 } 1346 1347 out: 1348 if ((char *)cdai.buf != buf) 1349 free(cdai.buf, M_CAMXPT); 1350 return ret; 1351 } 1352 1353 static dev_match_ret 1354 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1355 struct cam_eb *bus) 1356 { 1357 dev_match_ret retval; 1358 u_int i; 1359 1360 retval = DM_RET_NONE; 1361 1362 /* 1363 * If we aren't given something to match against, that's an error. 1364 */ 1365 if (bus == NULL) 1366 return(DM_RET_ERROR); 1367 1368 /* 1369 * If there are no match entries, then this bus matches no 1370 * matter what. 1371 */ 1372 if ((patterns == NULL) || (num_patterns == 0)) 1373 return(DM_RET_DESCEND | DM_RET_COPY); 1374 1375 for (i = 0; i < num_patterns; i++) { 1376 struct bus_match_pattern *cur_pattern; 1377 1378 /* 1379 * If the pattern in question isn't for a bus node, we 1380 * aren't interested. However, we do indicate to the 1381 * calling routine that we should continue descending the 1382 * tree, since the user wants to match against lower-level 1383 * EDT elements. 1384 */ 1385 if (patterns[i].type != DEV_MATCH_BUS) { 1386 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1387 retval |= DM_RET_DESCEND; 1388 continue; 1389 } 1390 1391 cur_pattern = &patterns[i].pattern.bus_pattern; 1392 1393 /* 1394 * If they want to match any bus node, we give them any 1395 * device node. 1396 */ 1397 if (cur_pattern->flags == BUS_MATCH_ANY) { 1398 /* set the copy flag */ 1399 retval |= DM_RET_COPY; 1400 1401 /* 1402 * If we've already decided on an action, go ahead 1403 * and return. 1404 */ 1405 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1406 return(retval); 1407 } 1408 1409 /* 1410 * Not sure why someone would do this... 1411 */ 1412 if (cur_pattern->flags == BUS_MATCH_NONE) 1413 continue; 1414 1415 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1416 && (cur_pattern->path_id != bus->path_id)) 1417 continue; 1418 1419 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1420 && (cur_pattern->bus_id != bus->sim->bus_id)) 1421 continue; 1422 1423 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1424 && (cur_pattern->unit_number != bus->sim->unit_number)) 1425 continue; 1426 1427 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1428 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1429 DEV_IDLEN) != 0)) 1430 continue; 1431 1432 /* 1433 * If we get to this point, the user definitely wants 1434 * information on this bus. So tell the caller to copy the 1435 * data out. 1436 */ 1437 retval |= DM_RET_COPY; 1438 1439 /* 1440 * If the return action has been set to descend, then we 1441 * know that we've already seen a non-bus matching 1442 * expression, therefore we need to further descend the tree. 1443 * This won't change by continuing around the loop, so we 1444 * go ahead and return. If we haven't seen a non-bus 1445 * matching expression, we keep going around the loop until 1446 * we exhaust the matching expressions. We'll set the stop 1447 * flag once we fall out of the loop. 1448 */ 1449 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1450 return(retval); 1451 } 1452 1453 /* 1454 * If the return action hasn't been set to descend yet, that means 1455 * we haven't seen anything other than bus matching patterns. So 1456 * tell the caller to stop descending the tree -- the user doesn't 1457 * want to match against lower level tree elements. 1458 */ 1459 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1460 retval |= DM_RET_STOP; 1461 1462 return(retval); 1463 } 1464 1465 static dev_match_ret 1466 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1467 struct cam_ed *device) 1468 { 1469 dev_match_ret retval; 1470 u_int i; 1471 1472 retval = DM_RET_NONE; 1473 1474 /* 1475 * If we aren't given something to match against, that's an error. 1476 */ 1477 if (device == NULL) 1478 return(DM_RET_ERROR); 1479 1480 /* 1481 * If there are no match entries, then this device matches no 1482 * matter what. 1483 */ 1484 if ((patterns == NULL) || (num_patterns == 0)) 1485 return(DM_RET_DESCEND | DM_RET_COPY); 1486 1487 for (i = 0; i < num_patterns; i++) { 1488 struct device_match_pattern *cur_pattern; 1489 struct scsi_vpd_device_id *device_id_page; 1490 1491 /* 1492 * If the pattern in question isn't for a device node, we 1493 * aren't interested. 1494 */ 1495 if (patterns[i].type != DEV_MATCH_DEVICE) { 1496 if ((patterns[i].type == DEV_MATCH_PERIPH) 1497 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1498 retval |= DM_RET_DESCEND; 1499 continue; 1500 } 1501 1502 cur_pattern = &patterns[i].pattern.device_pattern; 1503 1504 /* Error out if mutually exclusive options are specified. */ 1505 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1506 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1507 return(DM_RET_ERROR); 1508 1509 /* 1510 * If they want to match any device node, we give them any 1511 * device node. 1512 */ 1513 if (cur_pattern->flags == DEV_MATCH_ANY) 1514 goto copy_dev_node; 1515 1516 /* 1517 * Not sure why someone would do this... 1518 */ 1519 if (cur_pattern->flags == DEV_MATCH_NONE) 1520 continue; 1521 1522 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1523 && (cur_pattern->path_id != device->target->bus->path_id)) 1524 continue; 1525 1526 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1527 && (cur_pattern->target_id != device->target->target_id)) 1528 continue; 1529 1530 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1531 && (cur_pattern->target_lun != device->lun_id)) 1532 continue; 1533 1534 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1535 && (cam_quirkmatch((caddr_t)&device->inq_data, 1536 (caddr_t)&cur_pattern->data.inq_pat, 1537 1, sizeof(cur_pattern->data.inq_pat), 1538 scsi_static_inquiry_match) == NULL)) 1539 continue; 1540 1541 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1542 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1543 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1544 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1545 device->device_id_len 1546 - SVPD_DEVICE_ID_HDR_LEN, 1547 cur_pattern->data.devid_pat.id, 1548 cur_pattern->data.devid_pat.id_len) != 0)) 1549 continue; 1550 1551 copy_dev_node: 1552 /* 1553 * If we get to this point, the user definitely wants 1554 * information on this device. So tell the caller to copy 1555 * the data out. 1556 */ 1557 retval |= DM_RET_COPY; 1558 1559 /* 1560 * If the return action has been set to descend, then we 1561 * know that we've already seen a peripheral matching 1562 * expression, therefore we need to further descend the tree. 1563 * This won't change by continuing around the loop, so we 1564 * go ahead and return. If we haven't seen a peripheral 1565 * matching expression, we keep going around the loop until 1566 * we exhaust the matching expressions. We'll set the stop 1567 * flag once we fall out of the loop. 1568 */ 1569 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1570 return(retval); 1571 } 1572 1573 /* 1574 * If the return action hasn't been set to descend yet, that means 1575 * we haven't seen any peripheral matching patterns. So tell the 1576 * caller to stop descending the tree -- the user doesn't want to 1577 * match against lower level tree elements. 1578 */ 1579 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1580 retval |= DM_RET_STOP; 1581 1582 return(retval); 1583 } 1584 1585 /* 1586 * Match a single peripheral against any number of match patterns. 1587 */ 1588 static dev_match_ret 1589 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1590 struct cam_periph *periph) 1591 { 1592 dev_match_ret retval; 1593 u_int i; 1594 1595 /* 1596 * If we aren't given something to match against, that's an error. 1597 */ 1598 if (periph == NULL) 1599 return(DM_RET_ERROR); 1600 1601 /* 1602 * If there are no match entries, then this peripheral matches no 1603 * matter what. 1604 */ 1605 if ((patterns == NULL) || (num_patterns == 0)) 1606 return(DM_RET_STOP | DM_RET_COPY); 1607 1608 /* 1609 * There aren't any nodes below a peripheral node, so there's no 1610 * reason to descend the tree any further. 1611 */ 1612 retval = DM_RET_STOP; 1613 1614 for (i = 0; i < num_patterns; i++) { 1615 struct periph_match_pattern *cur_pattern; 1616 1617 /* 1618 * If the pattern in question isn't for a peripheral, we 1619 * aren't interested. 1620 */ 1621 if (patterns[i].type != DEV_MATCH_PERIPH) 1622 continue; 1623 1624 cur_pattern = &patterns[i].pattern.periph_pattern; 1625 1626 /* 1627 * If they want to match on anything, then we will do so. 1628 */ 1629 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1630 /* set the copy flag */ 1631 retval |= DM_RET_COPY; 1632 1633 /* 1634 * We've already set the return action to stop, 1635 * since there are no nodes below peripherals in 1636 * the tree. 1637 */ 1638 return(retval); 1639 } 1640 1641 /* 1642 * Not sure why someone would do this... 1643 */ 1644 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1645 continue; 1646 1647 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1648 && (cur_pattern->path_id != periph->path->bus->path_id)) 1649 continue; 1650 1651 /* 1652 * For the target and lun id's, we have to make sure the 1653 * target and lun pointers aren't NULL. The xpt peripheral 1654 * has a wildcard target and device. 1655 */ 1656 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1657 && ((periph->path->target == NULL) 1658 ||(cur_pattern->target_id != periph->path->target->target_id))) 1659 continue; 1660 1661 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1662 && ((periph->path->device == NULL) 1663 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1664 continue; 1665 1666 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1667 && (cur_pattern->unit_number != periph->unit_number)) 1668 continue; 1669 1670 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1671 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1672 DEV_IDLEN) != 0)) 1673 continue; 1674 1675 /* 1676 * If we get to this point, the user definitely wants 1677 * information on this peripheral. So tell the caller to 1678 * copy the data out. 1679 */ 1680 retval |= DM_RET_COPY; 1681 1682 /* 1683 * The return action has already been set to stop, since 1684 * peripherals don't have any nodes below them in the EDT. 1685 */ 1686 return(retval); 1687 } 1688 1689 /* 1690 * If we get to this point, the peripheral that was passed in 1691 * doesn't match any of the patterns. 1692 */ 1693 return(retval); 1694 } 1695 1696 static int 1697 xptedtbusfunc(struct cam_eb *bus, void *arg) 1698 { 1699 struct ccb_dev_match *cdm; 1700 struct cam_et *target; 1701 dev_match_ret retval; 1702 1703 cdm = (struct ccb_dev_match *)arg; 1704 1705 /* 1706 * If our position is for something deeper in the tree, that means 1707 * that we've already seen this node. So, we keep going down. 1708 */ 1709 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1710 && (cdm->pos.cookie.bus == bus) 1711 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1712 && (cdm->pos.cookie.target != NULL)) 1713 retval = DM_RET_DESCEND; 1714 else 1715 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1716 1717 /* 1718 * If we got an error, bail out of the search. 1719 */ 1720 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1721 cdm->status = CAM_DEV_MATCH_ERROR; 1722 return(0); 1723 } 1724 1725 /* 1726 * If the copy flag is set, copy this bus out. 1727 */ 1728 if (retval & DM_RET_COPY) { 1729 int spaceleft, j; 1730 1731 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1732 sizeof(struct dev_match_result)); 1733 1734 /* 1735 * If we don't have enough space to put in another 1736 * match result, save our position and tell the 1737 * user there are more devices to check. 1738 */ 1739 if (spaceleft < sizeof(struct dev_match_result)) { 1740 bzero(&cdm->pos, sizeof(cdm->pos)); 1741 cdm->pos.position_type = 1742 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1743 1744 cdm->pos.cookie.bus = bus; 1745 cdm->pos.generations[CAM_BUS_GENERATION]= 1746 xsoftc.bus_generation; 1747 cdm->status = CAM_DEV_MATCH_MORE; 1748 return(0); 1749 } 1750 j = cdm->num_matches; 1751 cdm->num_matches++; 1752 cdm->matches[j].type = DEV_MATCH_BUS; 1753 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1754 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1755 cdm->matches[j].result.bus_result.unit_number = 1756 bus->sim->unit_number; 1757 strlcpy(cdm->matches[j].result.bus_result.dev_name, 1758 bus->sim->sim_name, 1759 sizeof(cdm->matches[j].result.bus_result.dev_name)); 1760 } 1761 1762 /* 1763 * If the user is only interested in buses, there's no 1764 * reason to descend to the next level in the tree. 1765 */ 1766 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1767 return(1); 1768 1769 /* 1770 * If there is a target generation recorded, check it to 1771 * make sure the target list hasn't changed. 1772 */ 1773 mtx_lock(&bus->eb_mtx); 1774 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1775 && (cdm->pos.cookie.bus == bus) 1776 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1777 && (cdm->pos.cookie.target != NULL)) { 1778 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1779 bus->generation)) { 1780 mtx_unlock(&bus->eb_mtx); 1781 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1782 return (0); 1783 } 1784 target = (struct cam_et *)cdm->pos.cookie.target; 1785 target->refcount++; 1786 } else 1787 target = NULL; 1788 mtx_unlock(&bus->eb_mtx); 1789 1790 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1791 } 1792 1793 static int 1794 xptedttargetfunc(struct cam_et *target, void *arg) 1795 { 1796 struct ccb_dev_match *cdm; 1797 struct cam_eb *bus; 1798 struct cam_ed *device; 1799 1800 cdm = (struct ccb_dev_match *)arg; 1801 bus = target->bus; 1802 1803 /* 1804 * If there is a device list generation recorded, check it to 1805 * make sure the device list hasn't changed. 1806 */ 1807 mtx_lock(&bus->eb_mtx); 1808 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1809 && (cdm->pos.cookie.bus == bus) 1810 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1811 && (cdm->pos.cookie.target == target) 1812 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1813 && (cdm->pos.cookie.device != NULL)) { 1814 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1815 target->generation) { 1816 mtx_unlock(&bus->eb_mtx); 1817 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1818 return(0); 1819 } 1820 device = (struct cam_ed *)cdm->pos.cookie.device; 1821 device->refcount++; 1822 } else 1823 device = NULL; 1824 mtx_unlock(&bus->eb_mtx); 1825 1826 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1827 } 1828 1829 static int 1830 xptedtdevicefunc(struct cam_ed *device, void *arg) 1831 { 1832 struct cam_eb *bus; 1833 struct cam_periph *periph; 1834 struct ccb_dev_match *cdm; 1835 dev_match_ret retval; 1836 1837 cdm = (struct ccb_dev_match *)arg; 1838 bus = device->target->bus; 1839 1840 /* 1841 * If our position is for something deeper in the tree, that means 1842 * that we've already seen this node. So, we keep going down. 1843 */ 1844 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1845 && (cdm->pos.cookie.device == device) 1846 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1847 && (cdm->pos.cookie.periph != NULL)) 1848 retval = DM_RET_DESCEND; 1849 else 1850 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1851 device); 1852 1853 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1854 cdm->status = CAM_DEV_MATCH_ERROR; 1855 return(0); 1856 } 1857 1858 /* 1859 * If the copy flag is set, copy this device out. 1860 */ 1861 if (retval & DM_RET_COPY) { 1862 int spaceleft, j; 1863 1864 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1865 sizeof(struct dev_match_result)); 1866 1867 /* 1868 * If we don't have enough space to put in another 1869 * match result, save our position and tell the 1870 * user there are more devices to check. 1871 */ 1872 if (spaceleft < sizeof(struct dev_match_result)) { 1873 bzero(&cdm->pos, sizeof(cdm->pos)); 1874 cdm->pos.position_type = 1875 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1876 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1877 1878 cdm->pos.cookie.bus = device->target->bus; 1879 cdm->pos.generations[CAM_BUS_GENERATION]= 1880 xsoftc.bus_generation; 1881 cdm->pos.cookie.target = device->target; 1882 cdm->pos.generations[CAM_TARGET_GENERATION] = 1883 device->target->bus->generation; 1884 cdm->pos.cookie.device = device; 1885 cdm->pos.generations[CAM_DEV_GENERATION] = 1886 device->target->generation; 1887 cdm->status = CAM_DEV_MATCH_MORE; 1888 return(0); 1889 } 1890 j = cdm->num_matches; 1891 cdm->num_matches++; 1892 cdm->matches[j].type = DEV_MATCH_DEVICE; 1893 cdm->matches[j].result.device_result.path_id = 1894 device->target->bus->path_id; 1895 cdm->matches[j].result.device_result.target_id = 1896 device->target->target_id; 1897 cdm->matches[j].result.device_result.target_lun = 1898 device->lun_id; 1899 cdm->matches[j].result.device_result.protocol = 1900 device->protocol; 1901 bcopy(&device->inq_data, 1902 &cdm->matches[j].result.device_result.inq_data, 1903 sizeof(struct scsi_inquiry_data)); 1904 bcopy(&device->ident_data, 1905 &cdm->matches[j].result.device_result.ident_data, 1906 sizeof(struct ata_params)); 1907 1908 /* Let the user know whether this device is unconfigured */ 1909 if (device->flags & CAM_DEV_UNCONFIGURED) 1910 cdm->matches[j].result.device_result.flags = 1911 DEV_RESULT_UNCONFIGURED; 1912 else 1913 cdm->matches[j].result.device_result.flags = 1914 DEV_RESULT_NOFLAG; 1915 } 1916 1917 /* 1918 * If the user isn't interested in peripherals, don't descend 1919 * the tree any further. 1920 */ 1921 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1922 return(1); 1923 1924 /* 1925 * If there is a peripheral list generation recorded, make sure 1926 * it hasn't changed. 1927 */ 1928 xpt_lock_buses(); 1929 mtx_lock(&bus->eb_mtx); 1930 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1931 && (cdm->pos.cookie.bus == bus) 1932 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1933 && (cdm->pos.cookie.target == device->target) 1934 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1935 && (cdm->pos.cookie.device == device) 1936 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1937 && (cdm->pos.cookie.periph != NULL)) { 1938 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1939 device->generation) { 1940 mtx_unlock(&bus->eb_mtx); 1941 xpt_unlock_buses(); 1942 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1943 return(0); 1944 } 1945 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1946 periph->refcount++; 1947 } else 1948 periph = NULL; 1949 mtx_unlock(&bus->eb_mtx); 1950 xpt_unlock_buses(); 1951 1952 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1953 } 1954 1955 static int 1956 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1957 { 1958 struct ccb_dev_match *cdm; 1959 dev_match_ret retval; 1960 1961 cdm = (struct ccb_dev_match *)arg; 1962 1963 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1964 1965 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1966 cdm->status = CAM_DEV_MATCH_ERROR; 1967 return(0); 1968 } 1969 1970 /* 1971 * If the copy flag is set, copy this peripheral out. 1972 */ 1973 if (retval & DM_RET_COPY) { 1974 int spaceleft, j; 1975 size_t l; 1976 1977 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1978 sizeof(struct dev_match_result)); 1979 1980 /* 1981 * If we don't have enough space to put in another 1982 * match result, save our position and tell the 1983 * user there are more devices to check. 1984 */ 1985 if (spaceleft < sizeof(struct dev_match_result)) { 1986 bzero(&cdm->pos, sizeof(cdm->pos)); 1987 cdm->pos.position_type = 1988 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1989 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1990 CAM_DEV_POS_PERIPH; 1991 1992 cdm->pos.cookie.bus = periph->path->bus; 1993 cdm->pos.generations[CAM_BUS_GENERATION]= 1994 xsoftc.bus_generation; 1995 cdm->pos.cookie.target = periph->path->target; 1996 cdm->pos.generations[CAM_TARGET_GENERATION] = 1997 periph->path->bus->generation; 1998 cdm->pos.cookie.device = periph->path->device; 1999 cdm->pos.generations[CAM_DEV_GENERATION] = 2000 periph->path->target->generation; 2001 cdm->pos.cookie.periph = periph; 2002 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2003 periph->path->device->generation; 2004 cdm->status = CAM_DEV_MATCH_MORE; 2005 return(0); 2006 } 2007 2008 j = cdm->num_matches; 2009 cdm->num_matches++; 2010 cdm->matches[j].type = DEV_MATCH_PERIPH; 2011 cdm->matches[j].result.periph_result.path_id = 2012 periph->path->bus->path_id; 2013 cdm->matches[j].result.periph_result.target_id = 2014 periph->path->target->target_id; 2015 cdm->matches[j].result.periph_result.target_lun = 2016 periph->path->device->lun_id; 2017 cdm->matches[j].result.periph_result.unit_number = 2018 periph->unit_number; 2019 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2020 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2021 periph->periph_name, l); 2022 } 2023 2024 return(1); 2025 } 2026 2027 static int 2028 xptedtmatch(struct ccb_dev_match *cdm) 2029 { 2030 struct cam_eb *bus; 2031 int ret; 2032 2033 cdm->num_matches = 0; 2034 2035 /* 2036 * Check the bus list generation. If it has changed, the user 2037 * needs to reset everything and start over. 2038 */ 2039 xpt_lock_buses(); 2040 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2041 && (cdm->pos.cookie.bus != NULL)) { 2042 if (cdm->pos.generations[CAM_BUS_GENERATION] != 2043 xsoftc.bus_generation) { 2044 xpt_unlock_buses(); 2045 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2046 return(0); 2047 } 2048 bus = (struct cam_eb *)cdm->pos.cookie.bus; 2049 bus->refcount++; 2050 } else 2051 bus = NULL; 2052 xpt_unlock_buses(); 2053 2054 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 2055 2056 /* 2057 * If we get back 0, that means that we had to stop before fully 2058 * traversing the EDT. It also means that one of the subroutines 2059 * has set the status field to the proper value. If we get back 1, 2060 * we've fully traversed the EDT and copied out any matching entries. 2061 */ 2062 if (ret == 1) 2063 cdm->status = CAM_DEV_MATCH_LAST; 2064 2065 return(ret); 2066 } 2067 2068 static int 2069 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2070 { 2071 struct cam_periph *periph; 2072 struct ccb_dev_match *cdm; 2073 2074 cdm = (struct ccb_dev_match *)arg; 2075 2076 xpt_lock_buses(); 2077 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2078 && (cdm->pos.cookie.pdrv == pdrv) 2079 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2080 && (cdm->pos.cookie.periph != NULL)) { 2081 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2082 (*pdrv)->generation) { 2083 xpt_unlock_buses(); 2084 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2085 return(0); 2086 } 2087 periph = (struct cam_periph *)cdm->pos.cookie.periph; 2088 periph->refcount++; 2089 } else 2090 periph = NULL; 2091 xpt_unlock_buses(); 2092 2093 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 2094 } 2095 2096 static int 2097 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2098 { 2099 struct ccb_dev_match *cdm; 2100 dev_match_ret retval; 2101 2102 cdm = (struct ccb_dev_match *)arg; 2103 2104 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2105 2106 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2107 cdm->status = CAM_DEV_MATCH_ERROR; 2108 return(0); 2109 } 2110 2111 /* 2112 * If the copy flag is set, copy this peripheral out. 2113 */ 2114 if (retval & DM_RET_COPY) { 2115 int spaceleft, j; 2116 size_t l; 2117 2118 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2119 sizeof(struct dev_match_result)); 2120 2121 /* 2122 * If we don't have enough space to put in another 2123 * match result, save our position and tell the 2124 * user there are more devices to check. 2125 */ 2126 if (spaceleft < sizeof(struct dev_match_result)) { 2127 struct periph_driver **pdrv; 2128 2129 pdrv = NULL; 2130 bzero(&cdm->pos, sizeof(cdm->pos)); 2131 cdm->pos.position_type = 2132 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2133 CAM_DEV_POS_PERIPH; 2134 2135 /* 2136 * This may look a bit non-sensical, but it is 2137 * actually quite logical. There are very few 2138 * peripheral drivers, and bloating every peripheral 2139 * structure with a pointer back to its parent 2140 * peripheral driver linker set entry would cost 2141 * more in the long run than doing this quick lookup. 2142 */ 2143 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2144 if (strcmp((*pdrv)->driver_name, 2145 periph->periph_name) == 0) 2146 break; 2147 } 2148 2149 if (*pdrv == NULL) { 2150 cdm->status = CAM_DEV_MATCH_ERROR; 2151 return(0); 2152 } 2153 2154 cdm->pos.cookie.pdrv = pdrv; 2155 /* 2156 * The periph generation slot does double duty, as 2157 * does the periph pointer slot. They are used for 2158 * both edt and pdrv lookups and positioning. 2159 */ 2160 cdm->pos.cookie.periph = periph; 2161 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2162 (*pdrv)->generation; 2163 cdm->status = CAM_DEV_MATCH_MORE; 2164 return(0); 2165 } 2166 2167 j = cdm->num_matches; 2168 cdm->num_matches++; 2169 cdm->matches[j].type = DEV_MATCH_PERIPH; 2170 cdm->matches[j].result.periph_result.path_id = 2171 periph->path->bus->path_id; 2172 2173 /* 2174 * The transport layer peripheral doesn't have a target or 2175 * lun. 2176 */ 2177 if (periph->path->target) 2178 cdm->matches[j].result.periph_result.target_id = 2179 periph->path->target->target_id; 2180 else 2181 cdm->matches[j].result.periph_result.target_id = 2182 CAM_TARGET_WILDCARD; 2183 2184 if (periph->path->device) 2185 cdm->matches[j].result.periph_result.target_lun = 2186 periph->path->device->lun_id; 2187 else 2188 cdm->matches[j].result.periph_result.target_lun = 2189 CAM_LUN_WILDCARD; 2190 2191 cdm->matches[j].result.periph_result.unit_number = 2192 periph->unit_number; 2193 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2194 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2195 periph->periph_name, l); 2196 } 2197 2198 return(1); 2199 } 2200 2201 static int 2202 xptperiphlistmatch(struct ccb_dev_match *cdm) 2203 { 2204 int ret; 2205 2206 cdm->num_matches = 0; 2207 2208 /* 2209 * At this point in the edt traversal function, we check the bus 2210 * list generation to make sure that no buses have been added or 2211 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2212 * For the peripheral driver list traversal function, however, we 2213 * don't have to worry about new peripheral driver types coming or 2214 * going; they're in a linker set, and therefore can't change 2215 * without a recompile. 2216 */ 2217 2218 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2219 && (cdm->pos.cookie.pdrv != NULL)) 2220 ret = xptpdrvtraverse( 2221 (struct periph_driver **)cdm->pos.cookie.pdrv, 2222 xptplistpdrvfunc, cdm); 2223 else 2224 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2225 2226 /* 2227 * If we get back 0, that means that we had to stop before fully 2228 * traversing the peripheral driver tree. It also means that one of 2229 * the subroutines has set the status field to the proper value. If 2230 * we get back 1, we've fully traversed the EDT and copied out any 2231 * matching entries. 2232 */ 2233 if (ret == 1) 2234 cdm->status = CAM_DEV_MATCH_LAST; 2235 2236 return(ret); 2237 } 2238 2239 static int 2240 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2241 { 2242 struct cam_eb *bus, *next_bus; 2243 int retval; 2244 2245 retval = 1; 2246 if (start_bus) 2247 bus = start_bus; 2248 else { 2249 xpt_lock_buses(); 2250 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2251 if (bus == NULL) { 2252 xpt_unlock_buses(); 2253 return (retval); 2254 } 2255 bus->refcount++; 2256 xpt_unlock_buses(); 2257 } 2258 for (; bus != NULL; bus = next_bus) { 2259 retval = tr_func(bus, arg); 2260 if (retval == 0) { 2261 xpt_release_bus(bus); 2262 break; 2263 } 2264 xpt_lock_buses(); 2265 next_bus = TAILQ_NEXT(bus, links); 2266 if (next_bus) 2267 next_bus->refcount++; 2268 xpt_unlock_buses(); 2269 xpt_release_bus(bus); 2270 } 2271 return(retval); 2272 } 2273 2274 static int 2275 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2276 xpt_targetfunc_t *tr_func, void *arg) 2277 { 2278 struct cam_et *target, *next_target; 2279 int retval; 2280 2281 retval = 1; 2282 if (start_target) 2283 target = start_target; 2284 else { 2285 mtx_lock(&bus->eb_mtx); 2286 target = TAILQ_FIRST(&bus->et_entries); 2287 if (target == NULL) { 2288 mtx_unlock(&bus->eb_mtx); 2289 return (retval); 2290 } 2291 target->refcount++; 2292 mtx_unlock(&bus->eb_mtx); 2293 } 2294 for (; target != NULL; target = next_target) { 2295 retval = tr_func(target, arg); 2296 if (retval == 0) { 2297 xpt_release_target(target); 2298 break; 2299 } 2300 mtx_lock(&bus->eb_mtx); 2301 next_target = TAILQ_NEXT(target, links); 2302 if (next_target) 2303 next_target->refcount++; 2304 mtx_unlock(&bus->eb_mtx); 2305 xpt_release_target(target); 2306 } 2307 return(retval); 2308 } 2309 2310 static int 2311 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2312 xpt_devicefunc_t *tr_func, void *arg) 2313 { 2314 struct cam_eb *bus; 2315 struct cam_ed *device, *next_device; 2316 int retval; 2317 2318 retval = 1; 2319 bus = target->bus; 2320 if (start_device) 2321 device = start_device; 2322 else { 2323 mtx_lock(&bus->eb_mtx); 2324 device = TAILQ_FIRST(&target->ed_entries); 2325 if (device == NULL) { 2326 mtx_unlock(&bus->eb_mtx); 2327 return (retval); 2328 } 2329 device->refcount++; 2330 mtx_unlock(&bus->eb_mtx); 2331 } 2332 for (; device != NULL; device = next_device) { 2333 mtx_lock(&device->device_mtx); 2334 retval = tr_func(device, arg); 2335 mtx_unlock(&device->device_mtx); 2336 if (retval == 0) { 2337 xpt_release_device(device); 2338 break; 2339 } 2340 mtx_lock(&bus->eb_mtx); 2341 next_device = TAILQ_NEXT(device, links); 2342 if (next_device) 2343 next_device->refcount++; 2344 mtx_unlock(&bus->eb_mtx); 2345 xpt_release_device(device); 2346 } 2347 return(retval); 2348 } 2349 2350 static int 2351 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2352 xpt_periphfunc_t *tr_func, void *arg) 2353 { 2354 struct cam_eb *bus; 2355 struct cam_periph *periph, *next_periph; 2356 int retval; 2357 2358 retval = 1; 2359 2360 bus = device->target->bus; 2361 if (start_periph) 2362 periph = start_periph; 2363 else { 2364 xpt_lock_buses(); 2365 mtx_lock(&bus->eb_mtx); 2366 periph = SLIST_FIRST(&device->periphs); 2367 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2368 periph = SLIST_NEXT(periph, periph_links); 2369 if (periph == NULL) { 2370 mtx_unlock(&bus->eb_mtx); 2371 xpt_unlock_buses(); 2372 return (retval); 2373 } 2374 periph->refcount++; 2375 mtx_unlock(&bus->eb_mtx); 2376 xpt_unlock_buses(); 2377 } 2378 for (; periph != NULL; periph = next_periph) { 2379 retval = tr_func(periph, arg); 2380 if (retval == 0) { 2381 cam_periph_release_locked(periph); 2382 break; 2383 } 2384 xpt_lock_buses(); 2385 mtx_lock(&bus->eb_mtx); 2386 next_periph = SLIST_NEXT(periph, periph_links); 2387 while (next_periph != NULL && 2388 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2389 next_periph = SLIST_NEXT(next_periph, periph_links); 2390 if (next_periph) 2391 next_periph->refcount++; 2392 mtx_unlock(&bus->eb_mtx); 2393 xpt_unlock_buses(); 2394 cam_periph_release_locked(periph); 2395 } 2396 return(retval); 2397 } 2398 2399 static int 2400 xptpdrvtraverse(struct periph_driver **start_pdrv, 2401 xpt_pdrvfunc_t *tr_func, void *arg) 2402 { 2403 struct periph_driver **pdrv; 2404 int retval; 2405 2406 retval = 1; 2407 2408 /* 2409 * We don't traverse the peripheral driver list like we do the 2410 * other lists, because it is a linker set, and therefore cannot be 2411 * changed during runtime. If the peripheral driver list is ever 2412 * re-done to be something other than a linker set (i.e. it can 2413 * change while the system is running), the list traversal should 2414 * be modified to work like the other traversal functions. 2415 */ 2416 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2417 *pdrv != NULL; pdrv++) { 2418 retval = tr_func(pdrv, arg); 2419 2420 if (retval == 0) 2421 return(retval); 2422 } 2423 2424 return(retval); 2425 } 2426 2427 static int 2428 xptpdperiphtraverse(struct periph_driver **pdrv, 2429 struct cam_periph *start_periph, 2430 xpt_periphfunc_t *tr_func, void *arg) 2431 { 2432 struct cam_periph *periph, *next_periph; 2433 int retval; 2434 2435 retval = 1; 2436 2437 if (start_periph) 2438 periph = start_periph; 2439 else { 2440 xpt_lock_buses(); 2441 periph = TAILQ_FIRST(&(*pdrv)->units); 2442 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2443 periph = TAILQ_NEXT(periph, unit_links); 2444 if (periph == NULL) { 2445 xpt_unlock_buses(); 2446 return (retval); 2447 } 2448 periph->refcount++; 2449 xpt_unlock_buses(); 2450 } 2451 for (; periph != NULL; periph = next_periph) { 2452 cam_periph_lock(periph); 2453 retval = tr_func(periph, arg); 2454 cam_periph_unlock(periph); 2455 if (retval == 0) { 2456 cam_periph_release(periph); 2457 break; 2458 } 2459 xpt_lock_buses(); 2460 next_periph = TAILQ_NEXT(periph, unit_links); 2461 while (next_periph != NULL && 2462 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2463 next_periph = TAILQ_NEXT(next_periph, unit_links); 2464 if (next_periph) 2465 next_periph->refcount++; 2466 xpt_unlock_buses(); 2467 cam_periph_release(periph); 2468 } 2469 return(retval); 2470 } 2471 2472 static int 2473 xptdefbusfunc(struct cam_eb *bus, void *arg) 2474 { 2475 struct xpt_traverse_config *tr_config; 2476 2477 tr_config = (struct xpt_traverse_config *)arg; 2478 2479 if (tr_config->depth == XPT_DEPTH_BUS) { 2480 xpt_busfunc_t *tr_func; 2481 2482 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2483 2484 return(tr_func(bus, tr_config->tr_arg)); 2485 } else 2486 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2487 } 2488 2489 static int 2490 xptdeftargetfunc(struct cam_et *target, void *arg) 2491 { 2492 struct xpt_traverse_config *tr_config; 2493 2494 tr_config = (struct xpt_traverse_config *)arg; 2495 2496 if (tr_config->depth == XPT_DEPTH_TARGET) { 2497 xpt_targetfunc_t *tr_func; 2498 2499 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2500 2501 return(tr_func(target, tr_config->tr_arg)); 2502 } else 2503 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2504 } 2505 2506 static int 2507 xptdefdevicefunc(struct cam_ed *device, void *arg) 2508 { 2509 struct xpt_traverse_config *tr_config; 2510 2511 tr_config = (struct xpt_traverse_config *)arg; 2512 2513 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2514 xpt_devicefunc_t *tr_func; 2515 2516 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2517 2518 return(tr_func(device, tr_config->tr_arg)); 2519 } else 2520 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2521 } 2522 2523 static int 2524 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2525 { 2526 struct xpt_traverse_config *tr_config; 2527 xpt_periphfunc_t *tr_func; 2528 2529 tr_config = (struct xpt_traverse_config *)arg; 2530 2531 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2532 2533 /* 2534 * Unlike the other default functions, we don't check for depth 2535 * here. The peripheral driver level is the last level in the EDT, 2536 * so if we're here, we should execute the function in question. 2537 */ 2538 return(tr_func(periph, tr_config->tr_arg)); 2539 } 2540 2541 /* 2542 * Execute the given function for every bus in the EDT. 2543 */ 2544 static int 2545 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2546 { 2547 struct xpt_traverse_config tr_config; 2548 2549 tr_config.depth = XPT_DEPTH_BUS; 2550 tr_config.tr_func = tr_func; 2551 tr_config.tr_arg = arg; 2552 2553 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2554 } 2555 2556 /* 2557 * Execute the given function for every device in the EDT. 2558 */ 2559 static int 2560 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2561 { 2562 struct xpt_traverse_config tr_config; 2563 2564 tr_config.depth = XPT_DEPTH_DEVICE; 2565 tr_config.tr_func = tr_func; 2566 tr_config.tr_arg = arg; 2567 2568 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2569 } 2570 2571 static int 2572 xptsetasyncfunc(struct cam_ed *device, void *arg) 2573 { 2574 struct cam_path path; 2575 struct ccb_getdev cgd; 2576 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2577 2578 /* 2579 * Don't report unconfigured devices (Wildcard devs, 2580 * devices only for target mode, device instances 2581 * that have been invalidated but are waiting for 2582 * their last reference count to be released). 2583 */ 2584 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2585 return (1); 2586 2587 xpt_compile_path(&path, 2588 NULL, 2589 device->target->bus->path_id, 2590 device->target->target_id, 2591 device->lun_id); 2592 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2593 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2594 xpt_action((union ccb *)&cgd); 2595 csa->callback(csa->callback_arg, 2596 AC_FOUND_DEVICE, 2597 &path, &cgd); 2598 xpt_release_path(&path); 2599 2600 return(1); 2601 } 2602 2603 static int 2604 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2605 { 2606 struct cam_path path; 2607 struct ccb_pathinq cpi; 2608 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2609 2610 xpt_compile_path(&path, /*periph*/NULL, 2611 bus->path_id, 2612 CAM_TARGET_WILDCARD, 2613 CAM_LUN_WILDCARD); 2614 xpt_path_lock(&path); 2615 xpt_path_inq(&cpi, &path); 2616 csa->callback(csa->callback_arg, 2617 AC_PATH_REGISTERED, 2618 &path, &cpi); 2619 xpt_path_unlock(&path); 2620 xpt_release_path(&path); 2621 2622 return(1); 2623 } 2624 2625 void 2626 xpt_action(union ccb *start_ccb) 2627 { 2628 2629 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, 2630 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code, 2631 xpt_action_name(start_ccb->ccb_h.func_code))); 2632 2633 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2634 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb); 2635 } 2636 2637 void 2638 xpt_action_default(union ccb *start_ccb) 2639 { 2640 struct cam_path *path; 2641 struct cam_sim *sim; 2642 struct mtx *mtx; 2643 2644 path = start_ccb->ccb_h.path; 2645 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2646 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code, 2647 xpt_action_name(start_ccb->ccb_h.func_code))); 2648 2649 switch (start_ccb->ccb_h.func_code) { 2650 case XPT_SCSI_IO: 2651 { 2652 struct cam_ed *device; 2653 2654 /* 2655 * For the sake of compatibility with SCSI-1 2656 * devices that may not understand the identify 2657 * message, we include lun information in the 2658 * second byte of all commands. SCSI-1 specifies 2659 * that luns are a 3 bit value and reserves only 3 2660 * bits for lun information in the CDB. Later 2661 * revisions of the SCSI spec allow for more than 8 2662 * luns, but have deprecated lun information in the 2663 * CDB. So, if the lun won't fit, we must omit. 2664 * 2665 * Also be aware that during initial probing for devices, 2666 * the inquiry information is unknown but initialized to 0. 2667 * This means that this code will be exercised while probing 2668 * devices with an ANSI revision greater than 2. 2669 */ 2670 device = path->device; 2671 if (device->protocol_version <= SCSI_REV_2 2672 && start_ccb->ccb_h.target_lun < 8 2673 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2674 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2675 start_ccb->ccb_h.target_lun << 5; 2676 } 2677 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2678 } 2679 /* FALLTHROUGH */ 2680 case XPT_TARGET_IO: 2681 case XPT_CONT_TARGET_IO: 2682 start_ccb->csio.sense_resid = 0; 2683 start_ccb->csio.resid = 0; 2684 /* FALLTHROUGH */ 2685 case XPT_ATA_IO: 2686 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2687 start_ccb->ataio.resid = 0; 2688 /* FALLTHROUGH */ 2689 case XPT_NVME_IO: 2690 case XPT_NVME_ADMIN: 2691 case XPT_MMC_IO: 2692 case XPT_RESET_DEV: 2693 case XPT_ENG_EXEC: 2694 case XPT_SMP_IO: 2695 { 2696 struct cam_devq *devq; 2697 2698 devq = path->bus->sim->devq; 2699 mtx_lock(&devq->send_mtx); 2700 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2701 if (xpt_schedule_devq(devq, path->device) != 0) 2702 xpt_run_devq(devq); 2703 mtx_unlock(&devq->send_mtx); 2704 break; 2705 } 2706 case XPT_CALC_GEOMETRY: 2707 /* Filter out garbage */ 2708 if (start_ccb->ccg.block_size == 0 2709 || start_ccb->ccg.volume_size == 0) { 2710 start_ccb->ccg.cylinders = 0; 2711 start_ccb->ccg.heads = 0; 2712 start_ccb->ccg.secs_per_track = 0; 2713 start_ccb->ccb_h.status = CAM_REQ_CMP; 2714 break; 2715 } 2716 goto call_sim; 2717 case XPT_ABORT: 2718 { 2719 union ccb* abort_ccb; 2720 2721 abort_ccb = start_ccb->cab.abort_ccb; 2722 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2723 struct cam_ed *device; 2724 struct cam_devq *devq; 2725 2726 device = abort_ccb->ccb_h.path->device; 2727 devq = device->sim->devq; 2728 2729 mtx_lock(&devq->send_mtx); 2730 if (abort_ccb->ccb_h.pinfo.index > 0) { 2731 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb); 2732 abort_ccb->ccb_h.status = 2733 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2734 xpt_freeze_devq_device(device, 1); 2735 mtx_unlock(&devq->send_mtx); 2736 xpt_done(abort_ccb); 2737 start_ccb->ccb_h.status = CAM_REQ_CMP; 2738 break; 2739 } 2740 mtx_unlock(&devq->send_mtx); 2741 2742 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2743 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2744 /* 2745 * We've caught this ccb en route to 2746 * the SIM. Flag it for abort and the 2747 * SIM will do so just before starting 2748 * real work on the CCB. 2749 */ 2750 abort_ccb->ccb_h.status = 2751 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2752 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2753 start_ccb->ccb_h.status = CAM_REQ_CMP; 2754 break; 2755 } 2756 } 2757 if (XPT_FC_IS_QUEUED(abort_ccb) 2758 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2759 /* 2760 * It's already completed but waiting 2761 * for our SWI to get to it. 2762 */ 2763 start_ccb->ccb_h.status = CAM_UA_ABORT; 2764 break; 2765 } 2766 /* 2767 * If we weren't able to take care of the abort request 2768 * in the XPT, pass the request down to the SIM for processing. 2769 */ 2770 } 2771 /* FALLTHROUGH */ 2772 case XPT_ACCEPT_TARGET_IO: 2773 case XPT_EN_LUN: 2774 case XPT_IMMED_NOTIFY: 2775 case XPT_NOTIFY_ACK: 2776 case XPT_RESET_BUS: 2777 case XPT_IMMEDIATE_NOTIFY: 2778 case XPT_NOTIFY_ACKNOWLEDGE: 2779 case XPT_GET_SIM_KNOB_OLD: 2780 case XPT_GET_SIM_KNOB: 2781 case XPT_SET_SIM_KNOB: 2782 case XPT_GET_TRAN_SETTINGS: 2783 case XPT_SET_TRAN_SETTINGS: 2784 case XPT_PATH_INQ: 2785 call_sim: 2786 sim = path->bus->sim; 2787 mtx = sim->mtx; 2788 if (mtx && !mtx_owned(mtx)) 2789 mtx_lock(mtx); 2790 else 2791 mtx = NULL; 2792 2793 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2794 ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code)); 2795 (*(sim->sim_action))(sim, start_ccb); 2796 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2797 ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status)); 2798 if (mtx) 2799 mtx_unlock(mtx); 2800 break; 2801 case XPT_PATH_STATS: 2802 start_ccb->cpis.last_reset = path->bus->last_reset; 2803 start_ccb->ccb_h.status = CAM_REQ_CMP; 2804 break; 2805 case XPT_GDEV_TYPE: 2806 { 2807 struct cam_ed *dev; 2808 2809 dev = path->device; 2810 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2811 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2812 } else { 2813 struct ccb_getdev *cgd; 2814 2815 cgd = &start_ccb->cgd; 2816 cgd->protocol = dev->protocol; 2817 cgd->inq_data = dev->inq_data; 2818 cgd->ident_data = dev->ident_data; 2819 cgd->inq_flags = dev->inq_flags; 2820 cgd->ccb_h.status = CAM_REQ_CMP; 2821 cgd->serial_num_len = dev->serial_num_len; 2822 if ((dev->serial_num_len > 0) 2823 && (dev->serial_num != NULL)) 2824 bcopy(dev->serial_num, cgd->serial_num, 2825 dev->serial_num_len); 2826 } 2827 break; 2828 } 2829 case XPT_GDEV_STATS: 2830 { 2831 struct ccb_getdevstats *cgds = &start_ccb->cgds; 2832 struct cam_ed *dev = path->device; 2833 struct cam_eb *bus = path->bus; 2834 struct cam_et *tar = path->target; 2835 struct cam_devq *devq = bus->sim->devq; 2836 2837 mtx_lock(&devq->send_mtx); 2838 cgds->dev_openings = dev->ccbq.dev_openings; 2839 cgds->dev_active = dev->ccbq.dev_active; 2840 cgds->allocated = dev->ccbq.allocated; 2841 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2842 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued; 2843 cgds->last_reset = tar->last_reset; 2844 cgds->maxtags = dev->maxtags; 2845 cgds->mintags = dev->mintags; 2846 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2847 cgds->last_reset = bus->last_reset; 2848 mtx_unlock(&devq->send_mtx); 2849 cgds->ccb_h.status = CAM_REQ_CMP; 2850 break; 2851 } 2852 case XPT_GDEVLIST: 2853 { 2854 struct cam_periph *nperiph; 2855 struct periph_list *periph_head; 2856 struct ccb_getdevlist *cgdl; 2857 u_int i; 2858 struct cam_ed *device; 2859 int found; 2860 2861 found = 0; 2862 2863 /* 2864 * Don't want anyone mucking with our data. 2865 */ 2866 device = path->device; 2867 periph_head = &device->periphs; 2868 cgdl = &start_ccb->cgdl; 2869 2870 /* 2871 * Check and see if the list has changed since the user 2872 * last requested a list member. If so, tell them that the 2873 * list has changed, and therefore they need to start over 2874 * from the beginning. 2875 */ 2876 if ((cgdl->index != 0) && 2877 (cgdl->generation != device->generation)) { 2878 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2879 break; 2880 } 2881 2882 /* 2883 * Traverse the list of peripherals and attempt to find 2884 * the requested peripheral. 2885 */ 2886 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2887 (nperiph != NULL) && (i <= cgdl->index); 2888 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2889 if (i == cgdl->index) { 2890 strlcpy(cgdl->periph_name, 2891 nperiph->periph_name, 2892 sizeof(cgdl->periph_name)); 2893 cgdl->unit_number = nperiph->unit_number; 2894 found = 1; 2895 } 2896 } 2897 if (found == 0) { 2898 cgdl->status = CAM_GDEVLIST_ERROR; 2899 break; 2900 } 2901 2902 if (nperiph == NULL) 2903 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2904 else 2905 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2906 2907 cgdl->index++; 2908 cgdl->generation = device->generation; 2909 2910 cgdl->ccb_h.status = CAM_REQ_CMP; 2911 break; 2912 } 2913 case XPT_DEV_MATCH: 2914 { 2915 dev_pos_type position_type; 2916 struct ccb_dev_match *cdm; 2917 2918 cdm = &start_ccb->cdm; 2919 2920 /* 2921 * There are two ways of getting at information in the EDT. 2922 * The first way is via the primary EDT tree. It starts 2923 * with a list of buses, then a list of targets on a bus, 2924 * then devices/luns on a target, and then peripherals on a 2925 * device/lun. The "other" way is by the peripheral driver 2926 * lists. The peripheral driver lists are organized by 2927 * peripheral driver. (obviously) So it makes sense to 2928 * use the peripheral driver list if the user is looking 2929 * for something like "da1", or all "da" devices. If the 2930 * user is looking for something on a particular bus/target 2931 * or lun, it's generally better to go through the EDT tree. 2932 */ 2933 2934 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2935 position_type = cdm->pos.position_type; 2936 else { 2937 u_int i; 2938 2939 position_type = CAM_DEV_POS_NONE; 2940 2941 for (i = 0; i < cdm->num_patterns; i++) { 2942 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2943 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2944 position_type = CAM_DEV_POS_EDT; 2945 break; 2946 } 2947 } 2948 2949 if (cdm->num_patterns == 0) 2950 position_type = CAM_DEV_POS_EDT; 2951 else if (position_type == CAM_DEV_POS_NONE) 2952 position_type = CAM_DEV_POS_PDRV; 2953 } 2954 2955 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2956 case CAM_DEV_POS_EDT: 2957 xptedtmatch(cdm); 2958 break; 2959 case CAM_DEV_POS_PDRV: 2960 xptperiphlistmatch(cdm); 2961 break; 2962 default: 2963 cdm->status = CAM_DEV_MATCH_ERROR; 2964 break; 2965 } 2966 2967 if (cdm->status == CAM_DEV_MATCH_ERROR) 2968 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2969 else 2970 start_ccb->ccb_h.status = CAM_REQ_CMP; 2971 2972 break; 2973 } 2974 case XPT_SASYNC_CB: 2975 { 2976 struct ccb_setasync *csa; 2977 struct async_node *cur_entry; 2978 struct async_list *async_head; 2979 u_int32_t added; 2980 2981 csa = &start_ccb->csa; 2982 added = csa->event_enable; 2983 async_head = &path->device->asyncs; 2984 2985 /* 2986 * If there is already an entry for us, simply 2987 * update it. 2988 */ 2989 cur_entry = SLIST_FIRST(async_head); 2990 while (cur_entry != NULL) { 2991 if ((cur_entry->callback_arg == csa->callback_arg) 2992 && (cur_entry->callback == csa->callback)) 2993 break; 2994 cur_entry = SLIST_NEXT(cur_entry, links); 2995 } 2996 2997 if (cur_entry != NULL) { 2998 /* 2999 * If the request has no flags set, 3000 * remove the entry. 3001 */ 3002 added &= ~cur_entry->event_enable; 3003 if (csa->event_enable == 0) { 3004 SLIST_REMOVE(async_head, cur_entry, 3005 async_node, links); 3006 xpt_release_device(path->device); 3007 free(cur_entry, M_CAMXPT); 3008 } else { 3009 cur_entry->event_enable = csa->event_enable; 3010 } 3011 csa->event_enable = added; 3012 } else { 3013 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 3014 M_NOWAIT); 3015 if (cur_entry == NULL) { 3016 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 3017 break; 3018 } 3019 cur_entry->event_enable = csa->event_enable; 3020 cur_entry->event_lock = (path->bus->sim->mtx && 3021 mtx_owned(path->bus->sim->mtx)) ? 1 : 0; 3022 cur_entry->callback_arg = csa->callback_arg; 3023 cur_entry->callback = csa->callback; 3024 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3025 xpt_acquire_device(path->device); 3026 } 3027 start_ccb->ccb_h.status = CAM_REQ_CMP; 3028 break; 3029 } 3030 case XPT_REL_SIMQ: 3031 { 3032 struct ccb_relsim *crs; 3033 struct cam_ed *dev; 3034 3035 crs = &start_ccb->crs; 3036 dev = path->device; 3037 if (dev == NULL) { 3038 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3039 break; 3040 } 3041 3042 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3043 /* Don't ever go below one opening */ 3044 if (crs->openings > 0) { 3045 xpt_dev_ccbq_resize(path, crs->openings); 3046 if (bootverbose) { 3047 xpt_print(path, 3048 "number of openings is now %d\n", 3049 crs->openings); 3050 } 3051 } 3052 } 3053 3054 mtx_lock(&dev->sim->devq->send_mtx); 3055 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3056 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3057 /* 3058 * Just extend the old timeout and decrement 3059 * the freeze count so that a single timeout 3060 * is sufficient for releasing the queue. 3061 */ 3062 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3063 callout_stop(&dev->callout); 3064 } else { 3065 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3066 } 3067 3068 callout_reset_sbt(&dev->callout, 3069 SBT_1MS * crs->release_timeout, 0, 3070 xpt_release_devq_timeout, dev, 0); 3071 3072 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3073 } 3074 3075 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3076 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3077 /* 3078 * Decrement the freeze count so that a single 3079 * completion is still sufficient to unfreeze 3080 * the queue. 3081 */ 3082 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3083 } else { 3084 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3085 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3086 } 3087 } 3088 3089 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3090 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3091 || (dev->ccbq.dev_active == 0)) { 3092 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3093 } else { 3094 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3095 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3096 } 3097 } 3098 mtx_unlock(&dev->sim->devq->send_mtx); 3099 3100 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 3101 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 3102 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 3103 start_ccb->ccb_h.status = CAM_REQ_CMP; 3104 break; 3105 } 3106 case XPT_DEBUG: { 3107 struct cam_path *oldpath; 3108 3109 /* Check that all request bits are supported. */ 3110 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 3111 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3112 break; 3113 } 3114 3115 cam_dflags = CAM_DEBUG_NONE; 3116 if (cam_dpath != NULL) { 3117 oldpath = cam_dpath; 3118 cam_dpath = NULL; 3119 xpt_free_path(oldpath); 3120 } 3121 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 3122 if (xpt_create_path(&cam_dpath, NULL, 3123 start_ccb->ccb_h.path_id, 3124 start_ccb->ccb_h.target_id, 3125 start_ccb->ccb_h.target_lun) != 3126 CAM_REQ_CMP) { 3127 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3128 } else { 3129 cam_dflags = start_ccb->cdbg.flags; 3130 start_ccb->ccb_h.status = CAM_REQ_CMP; 3131 xpt_print(cam_dpath, "debugging flags now %x\n", 3132 cam_dflags); 3133 } 3134 } else 3135 start_ccb->ccb_h.status = CAM_REQ_CMP; 3136 break; 3137 } 3138 case XPT_NOOP: 3139 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3140 xpt_freeze_devq(path, 1); 3141 start_ccb->ccb_h.status = CAM_REQ_CMP; 3142 break; 3143 case XPT_REPROBE_LUN: 3144 xpt_async(AC_INQ_CHANGED, path, NULL); 3145 start_ccb->ccb_h.status = CAM_REQ_CMP; 3146 xpt_done(start_ccb); 3147 break; 3148 case XPT_ASYNC: 3149 start_ccb->ccb_h.status = CAM_REQ_CMP; 3150 xpt_done(start_ccb); 3151 break; 3152 default: 3153 case XPT_SDEV_TYPE: 3154 case XPT_TERM_IO: 3155 case XPT_ENG_INQ: 3156 /* XXX Implement */ 3157 xpt_print(start_ccb->ccb_h.path, 3158 "%s: CCB type %#x %s not supported\n", __func__, 3159 start_ccb->ccb_h.func_code, 3160 xpt_action_name(start_ccb->ccb_h.func_code)); 3161 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3162 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3163 xpt_done(start_ccb); 3164 } 3165 break; 3166 } 3167 CAM_DEBUG(path, CAM_DEBUG_TRACE, 3168 ("xpt_action_default: func= %#x %s status %#x\n", 3169 start_ccb->ccb_h.func_code, 3170 xpt_action_name(start_ccb->ccb_h.func_code), 3171 start_ccb->ccb_h.status)); 3172 } 3173 3174 /* 3175 * Call the sim poll routine to allow the sim to complete 3176 * any inflight requests, then call camisr_runqueue to 3177 * complete any CCB that the polling completed. 3178 */ 3179 void 3180 xpt_sim_poll(struct cam_sim *sim) 3181 { 3182 struct mtx *mtx; 3183 3184 mtx = sim->mtx; 3185 if (mtx) 3186 mtx_lock(mtx); 3187 (*(sim->sim_poll))(sim); 3188 if (mtx) 3189 mtx_unlock(mtx); 3190 camisr_runqueue(); 3191 } 3192 3193 uint32_t 3194 xpt_poll_setup(union ccb *start_ccb) 3195 { 3196 u_int32_t timeout; 3197 struct cam_sim *sim; 3198 struct cam_devq *devq; 3199 struct cam_ed *dev; 3200 3201 timeout = start_ccb->ccb_h.timeout * 10; 3202 sim = start_ccb->ccb_h.path->bus->sim; 3203 devq = sim->devq; 3204 dev = start_ccb->ccb_h.path->device; 3205 3206 /* 3207 * Steal an opening so that no other queued requests 3208 * can get it before us while we simulate interrupts. 3209 */ 3210 mtx_lock(&devq->send_mtx); 3211 dev->ccbq.dev_openings--; 3212 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3213 (--timeout > 0)) { 3214 mtx_unlock(&devq->send_mtx); 3215 DELAY(100); 3216 xpt_sim_poll(sim); 3217 mtx_lock(&devq->send_mtx); 3218 } 3219 dev->ccbq.dev_openings++; 3220 mtx_unlock(&devq->send_mtx); 3221 3222 return (timeout); 3223 } 3224 3225 void 3226 xpt_pollwait(union ccb *start_ccb, uint32_t timeout) 3227 { 3228 3229 while (--timeout > 0) { 3230 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim); 3231 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3232 != CAM_REQ_INPROG) 3233 break; 3234 DELAY(100); 3235 } 3236 3237 if (timeout == 0) { 3238 /* 3239 * XXX Is it worth adding a sim_timeout entry 3240 * point so we can attempt recovery? If 3241 * this is only used for dumps, I don't think 3242 * it is. 3243 */ 3244 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3245 } 3246 } 3247 3248 void 3249 xpt_polled_action(union ccb *start_ccb) 3250 { 3251 uint32_t timeout; 3252 struct cam_ed *dev; 3253 3254 timeout = start_ccb->ccb_h.timeout * 10; 3255 dev = start_ccb->ccb_h.path->device; 3256 3257 mtx_unlock(&dev->device_mtx); 3258 3259 timeout = xpt_poll_setup(start_ccb); 3260 if (timeout > 0) { 3261 xpt_action(start_ccb); 3262 xpt_pollwait(start_ccb, timeout); 3263 } else { 3264 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3265 } 3266 3267 mtx_lock(&dev->device_mtx); 3268 } 3269 3270 /* 3271 * Schedule a peripheral driver to receive a ccb when its 3272 * target device has space for more transactions. 3273 */ 3274 void 3275 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3276 { 3277 3278 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3279 cam_periph_assert(periph, MA_OWNED); 3280 if (new_priority < periph->scheduled_priority) { 3281 periph->scheduled_priority = new_priority; 3282 xpt_run_allocq(periph, 0); 3283 } 3284 } 3285 3286 /* 3287 * Schedule a device to run on a given queue. 3288 * If the device was inserted as a new entry on the queue, 3289 * return 1 meaning the device queue should be run. If we 3290 * were already queued, implying someone else has already 3291 * started the queue, return 0 so the caller doesn't attempt 3292 * to run the queue. 3293 */ 3294 static int 3295 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3296 u_int32_t new_priority) 3297 { 3298 int retval; 3299 u_int32_t old_priority; 3300 3301 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3302 3303 old_priority = pinfo->priority; 3304 3305 /* 3306 * Are we already queued? 3307 */ 3308 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3309 /* Simply reorder based on new priority */ 3310 if (new_priority < old_priority) { 3311 camq_change_priority(queue, pinfo->index, 3312 new_priority); 3313 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3314 ("changed priority to %d\n", 3315 new_priority)); 3316 retval = 1; 3317 } else 3318 retval = 0; 3319 } else { 3320 /* New entry on the queue */ 3321 if (new_priority < old_priority) 3322 pinfo->priority = new_priority; 3323 3324 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3325 ("Inserting onto queue\n")); 3326 pinfo->generation = ++queue->generation; 3327 camq_insert(queue, pinfo); 3328 retval = 1; 3329 } 3330 return (retval); 3331 } 3332 3333 static void 3334 xpt_run_allocq_task(void *context, int pending) 3335 { 3336 struct cam_periph *periph = context; 3337 3338 cam_periph_lock(periph); 3339 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3340 xpt_run_allocq(periph, 1); 3341 cam_periph_unlock(periph); 3342 cam_periph_release(periph); 3343 } 3344 3345 static void 3346 xpt_run_allocq(struct cam_periph *periph, int sleep) 3347 { 3348 struct cam_ed *device; 3349 union ccb *ccb; 3350 uint32_t prio; 3351 3352 cam_periph_assert(periph, MA_OWNED); 3353 if (periph->periph_allocating) 3354 return; 3355 cam_periph_doacquire(periph); 3356 periph->periph_allocating = 1; 3357 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3358 device = periph->path->device; 3359 ccb = NULL; 3360 restart: 3361 while ((prio = min(periph->scheduled_priority, 3362 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3363 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3364 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3365 if (ccb == NULL && 3366 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3367 if (sleep) { 3368 ccb = xpt_get_ccb(periph); 3369 goto restart; 3370 } 3371 if (periph->flags & CAM_PERIPH_RUN_TASK) 3372 break; 3373 cam_periph_doacquire(periph); 3374 periph->flags |= CAM_PERIPH_RUN_TASK; 3375 taskqueue_enqueue(xsoftc.xpt_taskq, 3376 &periph->periph_run_task); 3377 break; 3378 } 3379 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3380 if (prio == periph->immediate_priority) { 3381 periph->immediate_priority = CAM_PRIORITY_NONE; 3382 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3383 ("waking cam_periph_getccb()\n")); 3384 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3385 periph_links.sle); 3386 wakeup(&periph->ccb_list); 3387 } else { 3388 periph->scheduled_priority = CAM_PRIORITY_NONE; 3389 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3390 ("calling periph_start()\n")); 3391 periph->periph_start(periph, ccb); 3392 } 3393 ccb = NULL; 3394 } 3395 if (ccb != NULL) 3396 xpt_release_ccb(ccb); 3397 periph->periph_allocating = 0; 3398 cam_periph_release_locked(periph); 3399 } 3400 3401 static void 3402 xpt_run_devq(struct cam_devq *devq) 3403 { 3404 struct mtx *mtx; 3405 3406 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3407 3408 devq->send_queue.qfrozen_cnt++; 3409 while ((devq->send_queue.entries > 0) 3410 && (devq->send_openings > 0) 3411 && (devq->send_queue.qfrozen_cnt <= 1)) { 3412 struct cam_ed *device; 3413 union ccb *work_ccb; 3414 struct cam_sim *sim; 3415 struct xpt_proto *proto; 3416 3417 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3418 CAMQ_HEAD); 3419 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3420 ("running device %p\n", device)); 3421 3422 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3423 if (work_ccb == NULL) { 3424 printf("device on run queue with no ccbs???\n"); 3425 continue; 3426 } 3427 3428 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3429 mtx_lock(&xsoftc.xpt_highpower_lock); 3430 if (xsoftc.num_highpower <= 0) { 3431 /* 3432 * We got a high power command, but we 3433 * don't have any available slots. Freeze 3434 * the device queue until we have a slot 3435 * available. 3436 */ 3437 xpt_freeze_devq_device(device, 1); 3438 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3439 highpowerq_entry); 3440 3441 mtx_unlock(&xsoftc.xpt_highpower_lock); 3442 continue; 3443 } else { 3444 /* 3445 * Consume a high power slot while 3446 * this ccb runs. 3447 */ 3448 xsoftc.num_highpower--; 3449 } 3450 mtx_unlock(&xsoftc.xpt_highpower_lock); 3451 } 3452 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3453 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3454 devq->send_openings--; 3455 devq->send_active++; 3456 xpt_schedule_devq(devq, device); 3457 mtx_unlock(&devq->send_mtx); 3458 3459 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3460 /* 3461 * The client wants to freeze the queue 3462 * after this CCB is sent. 3463 */ 3464 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3465 } 3466 3467 /* In Target mode, the peripheral driver knows best... */ 3468 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3469 if ((device->inq_flags & SID_CmdQue) != 0 3470 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3471 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3472 else 3473 /* 3474 * Clear this in case of a retried CCB that 3475 * failed due to a rejected tag. 3476 */ 3477 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3478 } 3479 3480 KASSERT(device == work_ccb->ccb_h.path->device, 3481 ("device (%p) / path->device (%p) mismatch", 3482 device, work_ccb->ccb_h.path->device)); 3483 proto = xpt_proto_find(device->protocol); 3484 if (proto && proto->ops->debug_out) 3485 proto->ops->debug_out(work_ccb); 3486 3487 /* 3488 * Device queues can be shared among multiple SIM instances 3489 * that reside on different buses. Use the SIM from the 3490 * queued device, rather than the one from the calling bus. 3491 */ 3492 sim = device->sim; 3493 mtx = sim->mtx; 3494 if (mtx && !mtx_owned(mtx)) 3495 mtx_lock(mtx); 3496 else 3497 mtx = NULL; 3498 work_ccb->ccb_h.qos.periph_data = cam_iosched_now(); 3499 (*(sim->sim_action))(sim, work_ccb); 3500 if (mtx) 3501 mtx_unlock(mtx); 3502 mtx_lock(&devq->send_mtx); 3503 } 3504 devq->send_queue.qfrozen_cnt--; 3505 } 3506 3507 /* 3508 * This function merges stuff from the src ccb into the dst ccb, while keeping 3509 * important fields in the dst ccb constant. 3510 */ 3511 void 3512 xpt_merge_ccb(union ccb *dst_ccb, union ccb *src_ccb) 3513 { 3514 3515 /* 3516 * Pull fields that are valid for peripheral drivers to set 3517 * into the dst CCB along with the CCB "payload". 3518 */ 3519 dst_ccb->ccb_h.retry_count = src_ccb->ccb_h.retry_count; 3520 dst_ccb->ccb_h.func_code = src_ccb->ccb_h.func_code; 3521 dst_ccb->ccb_h.timeout = src_ccb->ccb_h.timeout; 3522 dst_ccb->ccb_h.flags = src_ccb->ccb_h.flags; 3523 bcopy(&(&src_ccb->ccb_h)[1], &(&dst_ccb->ccb_h)[1], 3524 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3525 } 3526 3527 void 3528 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path, 3529 u_int32_t priority, u_int32_t flags) 3530 { 3531 3532 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3533 ccb_h->pinfo.priority = priority; 3534 ccb_h->path = path; 3535 ccb_h->path_id = path->bus->path_id; 3536 if (path->target) 3537 ccb_h->target_id = path->target->target_id; 3538 else 3539 ccb_h->target_id = CAM_TARGET_WILDCARD; 3540 if (path->device) { 3541 ccb_h->target_lun = path->device->lun_id; 3542 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3543 } else { 3544 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3545 } 3546 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3547 ccb_h->flags = flags; 3548 ccb_h->xflags = 0; 3549 } 3550 3551 void 3552 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3553 { 3554 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0); 3555 } 3556 3557 /* Path manipulation functions */ 3558 cam_status 3559 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3560 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3561 { 3562 struct cam_path *path; 3563 cam_status status; 3564 3565 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3566 3567 if (path == NULL) { 3568 status = CAM_RESRC_UNAVAIL; 3569 return(status); 3570 } 3571 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3572 if (status != CAM_REQ_CMP) { 3573 free(path, M_CAMPATH); 3574 path = NULL; 3575 } 3576 *new_path_ptr = path; 3577 return (status); 3578 } 3579 3580 cam_status 3581 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3582 struct cam_periph *periph, path_id_t path_id, 3583 target_id_t target_id, lun_id_t lun_id) 3584 { 3585 3586 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3587 lun_id)); 3588 } 3589 3590 cam_status 3591 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3592 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3593 { 3594 struct cam_eb *bus; 3595 struct cam_et *target; 3596 struct cam_ed *device; 3597 cam_status status; 3598 3599 status = CAM_REQ_CMP; /* Completed without error */ 3600 target = NULL; /* Wildcarded */ 3601 device = NULL; /* Wildcarded */ 3602 3603 /* 3604 * We will potentially modify the EDT, so block interrupts 3605 * that may attempt to create cam paths. 3606 */ 3607 bus = xpt_find_bus(path_id); 3608 if (bus == NULL) { 3609 status = CAM_PATH_INVALID; 3610 } else { 3611 xpt_lock_buses(); 3612 mtx_lock(&bus->eb_mtx); 3613 target = xpt_find_target(bus, target_id); 3614 if (target == NULL) { 3615 /* Create one */ 3616 struct cam_et *new_target; 3617 3618 new_target = xpt_alloc_target(bus, target_id); 3619 if (new_target == NULL) { 3620 status = CAM_RESRC_UNAVAIL; 3621 } else { 3622 target = new_target; 3623 } 3624 } 3625 xpt_unlock_buses(); 3626 if (target != NULL) { 3627 device = xpt_find_device(target, lun_id); 3628 if (device == NULL) { 3629 /* Create one */ 3630 struct cam_ed *new_device; 3631 3632 new_device = 3633 (*(bus->xport->ops->alloc_device))(bus, 3634 target, 3635 lun_id); 3636 if (new_device == NULL) { 3637 status = CAM_RESRC_UNAVAIL; 3638 } else { 3639 device = new_device; 3640 } 3641 } 3642 } 3643 mtx_unlock(&bus->eb_mtx); 3644 } 3645 3646 /* 3647 * Only touch the user's data if we are successful. 3648 */ 3649 if (status == CAM_REQ_CMP) { 3650 new_path->periph = perph; 3651 new_path->bus = bus; 3652 new_path->target = target; 3653 new_path->device = device; 3654 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3655 } else { 3656 if (device != NULL) 3657 xpt_release_device(device); 3658 if (target != NULL) 3659 xpt_release_target(target); 3660 if (bus != NULL) 3661 xpt_release_bus(bus); 3662 } 3663 return (status); 3664 } 3665 3666 cam_status 3667 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3668 { 3669 struct cam_path *new_path; 3670 3671 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3672 if (new_path == NULL) 3673 return(CAM_RESRC_UNAVAIL); 3674 *new_path = *path; 3675 if (path->bus != NULL) 3676 xpt_acquire_bus(path->bus); 3677 if (path->target != NULL) 3678 xpt_acquire_target(path->target); 3679 if (path->device != NULL) 3680 xpt_acquire_device(path->device); 3681 *new_path_ptr = new_path; 3682 return (CAM_REQ_CMP); 3683 } 3684 3685 void 3686 xpt_release_path(struct cam_path *path) 3687 { 3688 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3689 if (path->device != NULL) { 3690 xpt_release_device(path->device); 3691 path->device = NULL; 3692 } 3693 if (path->target != NULL) { 3694 xpt_release_target(path->target); 3695 path->target = NULL; 3696 } 3697 if (path->bus != NULL) { 3698 xpt_release_bus(path->bus); 3699 path->bus = NULL; 3700 } 3701 } 3702 3703 void 3704 xpt_free_path(struct cam_path *path) 3705 { 3706 3707 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3708 xpt_release_path(path); 3709 free(path, M_CAMPATH); 3710 } 3711 3712 void 3713 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3714 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3715 { 3716 3717 xpt_lock_buses(); 3718 if (bus_ref) { 3719 if (path->bus) 3720 *bus_ref = path->bus->refcount; 3721 else 3722 *bus_ref = 0; 3723 } 3724 if (periph_ref) { 3725 if (path->periph) 3726 *periph_ref = path->periph->refcount; 3727 else 3728 *periph_ref = 0; 3729 } 3730 xpt_unlock_buses(); 3731 if (target_ref) { 3732 if (path->target) 3733 *target_ref = path->target->refcount; 3734 else 3735 *target_ref = 0; 3736 } 3737 if (device_ref) { 3738 if (path->device) 3739 *device_ref = path->device->refcount; 3740 else 3741 *device_ref = 0; 3742 } 3743 } 3744 3745 /* 3746 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3747 * in path1, 2 for match with wildcards in path2. 3748 */ 3749 int 3750 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3751 { 3752 int retval = 0; 3753 3754 if (path1->bus != path2->bus) { 3755 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3756 retval = 1; 3757 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3758 retval = 2; 3759 else 3760 return (-1); 3761 } 3762 if (path1->target != path2->target) { 3763 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3764 if (retval == 0) 3765 retval = 1; 3766 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3767 retval = 2; 3768 else 3769 return (-1); 3770 } 3771 if (path1->device != path2->device) { 3772 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3773 if (retval == 0) 3774 retval = 1; 3775 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3776 retval = 2; 3777 else 3778 return (-1); 3779 } 3780 return (retval); 3781 } 3782 3783 int 3784 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3785 { 3786 int retval = 0; 3787 3788 if (path->bus != dev->target->bus) { 3789 if (path->bus->path_id == CAM_BUS_WILDCARD) 3790 retval = 1; 3791 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3792 retval = 2; 3793 else 3794 return (-1); 3795 } 3796 if (path->target != dev->target) { 3797 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3798 if (retval == 0) 3799 retval = 1; 3800 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3801 retval = 2; 3802 else 3803 return (-1); 3804 } 3805 if (path->device != dev) { 3806 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3807 if (retval == 0) 3808 retval = 1; 3809 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3810 retval = 2; 3811 else 3812 return (-1); 3813 } 3814 return (retval); 3815 } 3816 3817 void 3818 xpt_print_path(struct cam_path *path) 3819 { 3820 struct sbuf sb; 3821 char buffer[XPT_PRINT_LEN]; 3822 3823 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3824 xpt_path_sbuf(path, &sb); 3825 sbuf_finish(&sb); 3826 printf("%s", sbuf_data(&sb)); 3827 sbuf_delete(&sb); 3828 } 3829 3830 void 3831 xpt_print_device(struct cam_ed *device) 3832 { 3833 3834 if (device == NULL) 3835 printf("(nopath): "); 3836 else { 3837 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3838 device->sim->unit_number, 3839 device->sim->bus_id, 3840 device->target->target_id, 3841 (uintmax_t)device->lun_id); 3842 } 3843 } 3844 3845 void 3846 xpt_print(struct cam_path *path, const char *fmt, ...) 3847 { 3848 va_list ap; 3849 struct sbuf sb; 3850 char buffer[XPT_PRINT_LEN]; 3851 3852 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3853 3854 xpt_path_sbuf(path, &sb); 3855 va_start(ap, fmt); 3856 sbuf_vprintf(&sb, fmt, ap); 3857 va_end(ap); 3858 3859 sbuf_finish(&sb); 3860 printf("%s", sbuf_data(&sb)); 3861 sbuf_delete(&sb); 3862 } 3863 3864 int 3865 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3866 { 3867 struct sbuf sb; 3868 int len; 3869 3870 sbuf_new(&sb, str, str_len, 0); 3871 len = xpt_path_sbuf(path, &sb); 3872 sbuf_finish(&sb); 3873 return (len); 3874 } 3875 3876 int 3877 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb) 3878 { 3879 3880 if (path == NULL) 3881 sbuf_printf(sb, "(nopath): "); 3882 else { 3883 if (path->periph != NULL) 3884 sbuf_printf(sb, "(%s%d:", path->periph->periph_name, 3885 path->periph->unit_number); 3886 else 3887 sbuf_printf(sb, "(noperiph:"); 3888 3889 if (path->bus != NULL) 3890 sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name, 3891 path->bus->sim->unit_number, 3892 path->bus->sim->bus_id); 3893 else 3894 sbuf_printf(sb, "nobus:"); 3895 3896 if (path->target != NULL) 3897 sbuf_printf(sb, "%d:", path->target->target_id); 3898 else 3899 sbuf_printf(sb, "X:"); 3900 3901 if (path->device != NULL) 3902 sbuf_printf(sb, "%jx): ", 3903 (uintmax_t)path->device->lun_id); 3904 else 3905 sbuf_printf(sb, "X): "); 3906 } 3907 3908 return(sbuf_len(sb)); 3909 } 3910 3911 path_id_t 3912 xpt_path_path_id(struct cam_path *path) 3913 { 3914 return(path->bus->path_id); 3915 } 3916 3917 target_id_t 3918 xpt_path_target_id(struct cam_path *path) 3919 { 3920 if (path->target != NULL) 3921 return (path->target->target_id); 3922 else 3923 return (CAM_TARGET_WILDCARD); 3924 } 3925 3926 lun_id_t 3927 xpt_path_lun_id(struct cam_path *path) 3928 { 3929 if (path->device != NULL) 3930 return (path->device->lun_id); 3931 else 3932 return (CAM_LUN_WILDCARD); 3933 } 3934 3935 struct cam_sim * 3936 xpt_path_sim(struct cam_path *path) 3937 { 3938 3939 return (path->bus->sim); 3940 } 3941 3942 struct cam_periph* 3943 xpt_path_periph(struct cam_path *path) 3944 { 3945 3946 return (path->periph); 3947 } 3948 3949 /* 3950 * Release a CAM control block for the caller. Remit the cost of the structure 3951 * to the device referenced by the path. If the this device had no 'credits' 3952 * and peripheral drivers have registered async callbacks for this notification 3953 * call them now. 3954 */ 3955 void 3956 xpt_release_ccb(union ccb *free_ccb) 3957 { 3958 struct cam_ed *device; 3959 struct cam_periph *periph; 3960 3961 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3962 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3963 device = free_ccb->ccb_h.path->device; 3964 periph = free_ccb->ccb_h.path->periph; 3965 3966 xpt_free_ccb(free_ccb); 3967 periph->periph_allocated--; 3968 cam_ccbq_release_opening(&device->ccbq); 3969 xpt_run_allocq(periph, 0); 3970 } 3971 3972 /* Functions accessed by SIM drivers */ 3973 3974 static struct xpt_xport_ops xport_default_ops = { 3975 .alloc_device = xpt_alloc_device_default, 3976 .action = xpt_action_default, 3977 .async = xpt_dev_async_default, 3978 }; 3979 static struct xpt_xport xport_default = { 3980 .xport = XPORT_UNKNOWN, 3981 .name = "unknown", 3982 .ops = &xport_default_ops, 3983 }; 3984 3985 CAM_XPT_XPORT(xport_default); 3986 3987 /* 3988 * A sim structure, listing the SIM entry points and instance 3989 * identification info is passed to xpt_bus_register to hook the SIM 3990 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3991 * for this new bus and places it in the array of buses and assigns 3992 * it a path_id. The path_id may be influenced by "hard wiring" 3993 * information specified by the user. Once interrupt services are 3994 * available, the bus will be probed. 3995 */ 3996 int32_t 3997 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3998 { 3999 struct cam_eb *new_bus; 4000 struct cam_eb *old_bus; 4001 struct ccb_pathinq cpi; 4002 struct cam_path *path; 4003 cam_status status; 4004 4005 sim->bus_id = bus; 4006 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 4007 M_CAMXPT, M_NOWAIT|M_ZERO); 4008 if (new_bus == NULL) { 4009 /* Couldn't satisfy request */ 4010 return (CAM_RESRC_UNAVAIL); 4011 } 4012 4013 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 4014 TAILQ_INIT(&new_bus->et_entries); 4015 cam_sim_hold(sim); 4016 new_bus->sim = sim; 4017 timevalclear(&new_bus->last_reset); 4018 new_bus->flags = 0; 4019 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4020 new_bus->generation = 0; 4021 4022 xpt_lock_buses(); 4023 sim->path_id = new_bus->path_id = 4024 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4025 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4026 while (old_bus != NULL 4027 && old_bus->path_id < new_bus->path_id) 4028 old_bus = TAILQ_NEXT(old_bus, links); 4029 if (old_bus != NULL) 4030 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4031 else 4032 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4033 xsoftc.bus_generation++; 4034 xpt_unlock_buses(); 4035 4036 /* 4037 * Set a default transport so that a PATH_INQ can be issued to 4038 * the SIM. This will then allow for probing and attaching of 4039 * a more appropriate transport. 4040 */ 4041 new_bus->xport = &xport_default; 4042 4043 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 4044 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4045 if (status != CAM_REQ_CMP) { 4046 xpt_release_bus(new_bus); 4047 return (CAM_RESRC_UNAVAIL); 4048 } 4049 4050 xpt_path_inq(&cpi, path); 4051 4052 if (cpi.ccb_h.status == CAM_REQ_CMP) { 4053 struct xpt_xport **xpt; 4054 4055 SET_FOREACH(xpt, cam_xpt_xport_set) { 4056 if ((*xpt)->xport == cpi.transport) { 4057 new_bus->xport = *xpt; 4058 break; 4059 } 4060 } 4061 if (new_bus->xport == NULL) { 4062 xpt_print(path, 4063 "No transport found for %d\n", cpi.transport); 4064 xpt_release_bus(new_bus); 4065 free(path, M_CAMXPT); 4066 return (CAM_RESRC_UNAVAIL); 4067 } 4068 } 4069 4070 /* Notify interested parties */ 4071 if (sim->path_id != CAM_XPT_PATH_ID) { 4072 xpt_async(AC_PATH_REGISTERED, path, &cpi); 4073 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 4074 union ccb *scan_ccb; 4075 4076 /* Initiate bus rescan. */ 4077 scan_ccb = xpt_alloc_ccb_nowait(); 4078 if (scan_ccb != NULL) { 4079 scan_ccb->ccb_h.path = path; 4080 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 4081 scan_ccb->crcn.flags = 0; 4082 xpt_rescan(scan_ccb); 4083 } else { 4084 xpt_print(path, 4085 "Can't allocate CCB to scan bus\n"); 4086 xpt_free_path(path); 4087 } 4088 } else 4089 xpt_free_path(path); 4090 } else 4091 xpt_free_path(path); 4092 return (CAM_SUCCESS); 4093 } 4094 4095 int32_t 4096 xpt_bus_deregister(path_id_t pathid) 4097 { 4098 struct cam_path bus_path; 4099 cam_status status; 4100 4101 status = xpt_compile_path(&bus_path, NULL, pathid, 4102 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4103 if (status != CAM_REQ_CMP) 4104 return (status); 4105 4106 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4107 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4108 4109 /* Release the reference count held while registered. */ 4110 xpt_release_bus(bus_path.bus); 4111 xpt_release_path(&bus_path); 4112 4113 return (CAM_REQ_CMP); 4114 } 4115 4116 static path_id_t 4117 xptnextfreepathid(void) 4118 { 4119 struct cam_eb *bus; 4120 path_id_t pathid; 4121 const char *strval; 4122 4123 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4124 pathid = 0; 4125 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4126 retry: 4127 /* Find an unoccupied pathid */ 4128 while (bus != NULL && bus->path_id <= pathid) { 4129 if (bus->path_id == pathid) 4130 pathid++; 4131 bus = TAILQ_NEXT(bus, links); 4132 } 4133 4134 /* 4135 * Ensure that this pathid is not reserved for 4136 * a bus that may be registered in the future. 4137 */ 4138 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4139 ++pathid; 4140 /* Start the search over */ 4141 goto retry; 4142 } 4143 return (pathid); 4144 } 4145 4146 static path_id_t 4147 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4148 { 4149 path_id_t pathid; 4150 int i, dunit, val; 4151 char buf[32]; 4152 const char *dname; 4153 4154 pathid = CAM_XPT_PATH_ID; 4155 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4156 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 4157 return (pathid); 4158 i = 0; 4159 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4160 if (strcmp(dname, "scbus")) { 4161 /* Avoid a bit of foot shooting. */ 4162 continue; 4163 } 4164 if (dunit < 0) /* unwired?! */ 4165 continue; 4166 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4167 if (sim_bus == val) { 4168 pathid = dunit; 4169 break; 4170 } 4171 } else if (sim_bus == 0) { 4172 /* Unspecified matches bus 0 */ 4173 pathid = dunit; 4174 break; 4175 } else { 4176 printf("Ambiguous scbus configuration for %s%d " 4177 "bus %d, cannot wire down. The kernel " 4178 "config entry for scbus%d should " 4179 "specify a controller bus.\n" 4180 "Scbus will be assigned dynamically.\n", 4181 sim_name, sim_unit, sim_bus, dunit); 4182 break; 4183 } 4184 } 4185 4186 if (pathid == CAM_XPT_PATH_ID) 4187 pathid = xptnextfreepathid(); 4188 return (pathid); 4189 } 4190 4191 static const char * 4192 xpt_async_string(u_int32_t async_code) 4193 { 4194 4195 switch (async_code) { 4196 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4197 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4198 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4199 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4200 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4201 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4202 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4203 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4204 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4205 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4206 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4207 case AC_CONTRACT: return ("AC_CONTRACT"); 4208 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4209 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4210 } 4211 return ("AC_UNKNOWN"); 4212 } 4213 4214 static int 4215 xpt_async_size(u_int32_t async_code) 4216 { 4217 4218 switch (async_code) { 4219 case AC_BUS_RESET: return (0); 4220 case AC_UNSOL_RESEL: return (0); 4221 case AC_SCSI_AEN: return (0); 4222 case AC_SENT_BDR: return (0); 4223 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4224 case AC_PATH_DEREGISTERED: return (0); 4225 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4226 case AC_LOST_DEVICE: return (0); 4227 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4228 case AC_INQ_CHANGED: return (0); 4229 case AC_GETDEV_CHANGED: return (0); 4230 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4231 case AC_ADVINFO_CHANGED: return (-1); 4232 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4233 } 4234 return (0); 4235 } 4236 4237 static int 4238 xpt_async_process_dev(struct cam_ed *device, void *arg) 4239 { 4240 union ccb *ccb = arg; 4241 struct cam_path *path = ccb->ccb_h.path; 4242 void *async_arg = ccb->casync.async_arg_ptr; 4243 u_int32_t async_code = ccb->casync.async_code; 4244 int relock; 4245 4246 if (path->device != device 4247 && path->device->lun_id != CAM_LUN_WILDCARD 4248 && device->lun_id != CAM_LUN_WILDCARD) 4249 return (1); 4250 4251 /* 4252 * The async callback could free the device. 4253 * If it is a broadcast async, it doesn't hold 4254 * device reference, so take our own reference. 4255 */ 4256 xpt_acquire_device(device); 4257 4258 /* 4259 * If async for specific device is to be delivered to 4260 * the wildcard client, take the specific device lock. 4261 * XXX: We may need a way for client to specify it. 4262 */ 4263 if ((device->lun_id == CAM_LUN_WILDCARD && 4264 path->device->lun_id != CAM_LUN_WILDCARD) || 4265 (device->target->target_id == CAM_TARGET_WILDCARD && 4266 path->target->target_id != CAM_TARGET_WILDCARD) || 4267 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4268 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4269 mtx_unlock(&device->device_mtx); 4270 xpt_path_lock(path); 4271 relock = 1; 4272 } else 4273 relock = 0; 4274 4275 (*(device->target->bus->xport->ops->async))(async_code, 4276 device->target->bus, device->target, device, async_arg); 4277 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4278 4279 if (relock) { 4280 xpt_path_unlock(path); 4281 mtx_lock(&device->device_mtx); 4282 } 4283 xpt_release_device(device); 4284 return (1); 4285 } 4286 4287 static int 4288 xpt_async_process_tgt(struct cam_et *target, void *arg) 4289 { 4290 union ccb *ccb = arg; 4291 struct cam_path *path = ccb->ccb_h.path; 4292 4293 if (path->target != target 4294 && path->target->target_id != CAM_TARGET_WILDCARD 4295 && target->target_id != CAM_TARGET_WILDCARD) 4296 return (1); 4297 4298 if (ccb->casync.async_code == AC_SENT_BDR) { 4299 /* Update our notion of when the last reset occurred */ 4300 microtime(&target->last_reset); 4301 } 4302 4303 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4304 } 4305 4306 static void 4307 xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4308 { 4309 struct cam_eb *bus; 4310 struct cam_path *path; 4311 void *async_arg; 4312 u_int32_t async_code; 4313 4314 path = ccb->ccb_h.path; 4315 async_code = ccb->casync.async_code; 4316 async_arg = ccb->casync.async_arg_ptr; 4317 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4318 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4319 bus = path->bus; 4320 4321 if (async_code == AC_BUS_RESET) { 4322 /* Update our notion of when the last reset occurred */ 4323 microtime(&bus->last_reset); 4324 } 4325 4326 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4327 4328 /* 4329 * If this wasn't a fully wildcarded async, tell all 4330 * clients that want all async events. 4331 */ 4332 if (bus != xpt_periph->path->bus) { 4333 xpt_path_lock(xpt_periph->path); 4334 xpt_async_process_dev(xpt_periph->path->device, ccb); 4335 xpt_path_unlock(xpt_periph->path); 4336 } 4337 4338 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4339 xpt_release_devq(path, 1, TRUE); 4340 else 4341 xpt_release_simq(path->bus->sim, TRUE); 4342 if (ccb->casync.async_arg_size > 0) 4343 free(async_arg, M_CAMXPT); 4344 xpt_free_path(path); 4345 xpt_free_ccb(ccb); 4346 } 4347 4348 static void 4349 xpt_async_bcast(struct async_list *async_head, 4350 u_int32_t async_code, 4351 struct cam_path *path, void *async_arg) 4352 { 4353 struct async_node *cur_entry; 4354 struct mtx *mtx; 4355 4356 cur_entry = SLIST_FIRST(async_head); 4357 while (cur_entry != NULL) { 4358 struct async_node *next_entry; 4359 /* 4360 * Grab the next list entry before we call the current 4361 * entry's callback. This is because the callback function 4362 * can delete its async callback entry. 4363 */ 4364 next_entry = SLIST_NEXT(cur_entry, links); 4365 if ((cur_entry->event_enable & async_code) != 0) { 4366 mtx = cur_entry->event_lock ? 4367 path->device->sim->mtx : NULL; 4368 if (mtx) 4369 mtx_lock(mtx); 4370 cur_entry->callback(cur_entry->callback_arg, 4371 async_code, path, 4372 async_arg); 4373 if (mtx) 4374 mtx_unlock(mtx); 4375 } 4376 cur_entry = next_entry; 4377 } 4378 } 4379 4380 void 4381 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4382 { 4383 union ccb *ccb; 4384 int size; 4385 4386 ccb = xpt_alloc_ccb_nowait(); 4387 if (ccb == NULL) { 4388 xpt_print(path, "Can't allocate CCB to send %s\n", 4389 xpt_async_string(async_code)); 4390 return; 4391 } 4392 4393 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4394 xpt_print(path, "Can't allocate path to send %s\n", 4395 xpt_async_string(async_code)); 4396 xpt_free_ccb(ccb); 4397 return; 4398 } 4399 ccb->ccb_h.path->periph = NULL; 4400 ccb->ccb_h.func_code = XPT_ASYNC; 4401 ccb->ccb_h.cbfcnp = xpt_async_process; 4402 ccb->ccb_h.flags |= CAM_UNLOCKED; 4403 ccb->casync.async_code = async_code; 4404 ccb->casync.async_arg_size = 0; 4405 size = xpt_async_size(async_code); 4406 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 4407 ("xpt_async: func %#x %s aync_code %d %s\n", 4408 ccb->ccb_h.func_code, 4409 xpt_action_name(ccb->ccb_h.func_code), 4410 async_code, 4411 xpt_async_string(async_code))); 4412 if (size > 0 && async_arg != NULL) { 4413 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4414 if (ccb->casync.async_arg_ptr == NULL) { 4415 xpt_print(path, "Can't allocate argument to send %s\n", 4416 xpt_async_string(async_code)); 4417 xpt_free_path(ccb->ccb_h.path); 4418 xpt_free_ccb(ccb); 4419 return; 4420 } 4421 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4422 ccb->casync.async_arg_size = size; 4423 } else if (size < 0) { 4424 ccb->casync.async_arg_ptr = async_arg; 4425 ccb->casync.async_arg_size = size; 4426 } 4427 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4428 xpt_freeze_devq(path, 1); 4429 else 4430 xpt_freeze_simq(path->bus->sim, 1); 4431 xpt_action(ccb); 4432 } 4433 4434 static void 4435 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4436 struct cam_et *target, struct cam_ed *device, 4437 void *async_arg) 4438 { 4439 4440 /* 4441 * We only need to handle events for real devices. 4442 */ 4443 if (target->target_id == CAM_TARGET_WILDCARD 4444 || device->lun_id == CAM_LUN_WILDCARD) 4445 return; 4446 4447 printf("%s called\n", __func__); 4448 } 4449 4450 static uint32_t 4451 xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4452 { 4453 struct cam_devq *devq; 4454 uint32_t freeze; 4455 4456 devq = dev->sim->devq; 4457 mtx_assert(&devq->send_mtx, MA_OWNED); 4458 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4459 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4460 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4461 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4462 /* Remove frozen device from sendq. */ 4463 if (device_is_queued(dev)) 4464 camq_remove(&devq->send_queue, dev->devq_entry.index); 4465 return (freeze); 4466 } 4467 4468 u_int32_t 4469 xpt_freeze_devq(struct cam_path *path, u_int count) 4470 { 4471 struct cam_ed *dev = path->device; 4472 struct cam_devq *devq; 4473 uint32_t freeze; 4474 4475 devq = dev->sim->devq; 4476 mtx_lock(&devq->send_mtx); 4477 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4478 freeze = xpt_freeze_devq_device(dev, count); 4479 mtx_unlock(&devq->send_mtx); 4480 return (freeze); 4481 } 4482 4483 u_int32_t 4484 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4485 { 4486 struct cam_devq *devq; 4487 uint32_t freeze; 4488 4489 devq = sim->devq; 4490 mtx_lock(&devq->send_mtx); 4491 freeze = (devq->send_queue.qfrozen_cnt += count); 4492 mtx_unlock(&devq->send_mtx); 4493 return (freeze); 4494 } 4495 4496 static void 4497 xpt_release_devq_timeout(void *arg) 4498 { 4499 struct cam_ed *dev; 4500 struct cam_devq *devq; 4501 4502 dev = (struct cam_ed *)arg; 4503 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4504 devq = dev->sim->devq; 4505 mtx_assert(&devq->send_mtx, MA_OWNED); 4506 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4507 xpt_run_devq(devq); 4508 } 4509 4510 void 4511 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4512 { 4513 struct cam_ed *dev; 4514 struct cam_devq *devq; 4515 4516 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4517 count, run_queue)); 4518 dev = path->device; 4519 devq = dev->sim->devq; 4520 mtx_lock(&devq->send_mtx); 4521 if (xpt_release_devq_device(dev, count, run_queue)) 4522 xpt_run_devq(dev->sim->devq); 4523 mtx_unlock(&devq->send_mtx); 4524 } 4525 4526 static int 4527 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4528 { 4529 4530 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4531 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4532 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4533 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4534 if (count > dev->ccbq.queue.qfrozen_cnt) { 4535 #ifdef INVARIANTS 4536 printf("xpt_release_devq(): requested %u > present %u\n", 4537 count, dev->ccbq.queue.qfrozen_cnt); 4538 #endif 4539 count = dev->ccbq.queue.qfrozen_cnt; 4540 } 4541 dev->ccbq.queue.qfrozen_cnt -= count; 4542 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4543 /* 4544 * No longer need to wait for a successful 4545 * command completion. 4546 */ 4547 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4548 /* 4549 * Remove any timeouts that might be scheduled 4550 * to release this queue. 4551 */ 4552 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4553 callout_stop(&dev->callout); 4554 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4555 } 4556 /* 4557 * Now that we are unfrozen schedule the 4558 * device so any pending transactions are 4559 * run. 4560 */ 4561 xpt_schedule_devq(dev->sim->devq, dev); 4562 } else 4563 run_queue = 0; 4564 return (run_queue); 4565 } 4566 4567 void 4568 xpt_release_simq(struct cam_sim *sim, int run_queue) 4569 { 4570 struct cam_devq *devq; 4571 4572 devq = sim->devq; 4573 mtx_lock(&devq->send_mtx); 4574 if (devq->send_queue.qfrozen_cnt <= 0) { 4575 #ifdef INVARIANTS 4576 printf("xpt_release_simq: requested 1 > present %u\n", 4577 devq->send_queue.qfrozen_cnt); 4578 #endif 4579 } else 4580 devq->send_queue.qfrozen_cnt--; 4581 if (devq->send_queue.qfrozen_cnt == 0) { 4582 /* 4583 * If there is a timeout scheduled to release this 4584 * sim queue, remove it. The queue frozen count is 4585 * already at 0. 4586 */ 4587 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4588 callout_stop(&sim->callout); 4589 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4590 } 4591 if (run_queue) { 4592 /* 4593 * Now that we are unfrozen run the send queue. 4594 */ 4595 xpt_run_devq(sim->devq); 4596 } 4597 } 4598 mtx_unlock(&devq->send_mtx); 4599 } 4600 4601 void 4602 xpt_done(union ccb *done_ccb) 4603 { 4604 struct cam_doneq *queue; 4605 int run, hash; 4606 4607 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 4608 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO && 4609 done_ccb->csio.bio != NULL) 4610 biotrack(done_ccb->csio.bio, __func__); 4611 #endif 4612 4613 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4614 ("xpt_done: func= %#x %s status %#x\n", 4615 done_ccb->ccb_h.func_code, 4616 xpt_action_name(done_ccb->ccb_h.func_code), 4617 done_ccb->ccb_h.status)); 4618 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4619 return; 4620 4621 /* Store the time the ccb was in the sim */ 4622 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); 4623 hash = (u_int)(done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4624 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4625 queue = &cam_doneqs[hash]; 4626 mtx_lock(&queue->cam_doneq_mtx); 4627 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4628 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4629 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4630 mtx_unlock(&queue->cam_doneq_mtx); 4631 if (run) 4632 wakeup(&queue->cam_doneq); 4633 } 4634 4635 void 4636 xpt_done_direct(union ccb *done_ccb) 4637 { 4638 4639 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4640 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status)); 4641 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4642 return; 4643 4644 /* Store the time the ccb was in the sim */ 4645 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); 4646 xpt_done_process(&done_ccb->ccb_h); 4647 } 4648 4649 union ccb * 4650 xpt_alloc_ccb(void) 4651 { 4652 union ccb *new_ccb; 4653 4654 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4655 return (new_ccb); 4656 } 4657 4658 union ccb * 4659 xpt_alloc_ccb_nowait(void) 4660 { 4661 union ccb *new_ccb; 4662 4663 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4664 return (new_ccb); 4665 } 4666 4667 void 4668 xpt_free_ccb(union ccb *free_ccb) 4669 { 4670 free(free_ccb, M_CAMCCB); 4671 } 4672 4673 /* Private XPT functions */ 4674 4675 /* 4676 * Get a CAM control block for the caller. Charge the structure to the device 4677 * referenced by the path. If we don't have sufficient resources to allocate 4678 * more ccbs, we return NULL. 4679 */ 4680 static union ccb * 4681 xpt_get_ccb_nowait(struct cam_periph *periph) 4682 { 4683 union ccb *new_ccb; 4684 4685 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4686 if (new_ccb == NULL) 4687 return (NULL); 4688 periph->periph_allocated++; 4689 cam_ccbq_take_opening(&periph->path->device->ccbq); 4690 return (new_ccb); 4691 } 4692 4693 static union ccb * 4694 xpt_get_ccb(struct cam_periph *periph) 4695 { 4696 union ccb *new_ccb; 4697 4698 cam_periph_unlock(periph); 4699 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4700 cam_periph_lock(periph); 4701 periph->periph_allocated++; 4702 cam_ccbq_take_opening(&periph->path->device->ccbq); 4703 return (new_ccb); 4704 } 4705 4706 union ccb * 4707 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4708 { 4709 struct ccb_hdr *ccb_h; 4710 4711 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4712 cam_periph_assert(periph, MA_OWNED); 4713 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4714 ccb_h->pinfo.priority != priority) { 4715 if (priority < periph->immediate_priority) { 4716 periph->immediate_priority = priority; 4717 xpt_run_allocq(periph, 0); 4718 } else 4719 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4720 "cgticb", 0); 4721 } 4722 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4723 return ((union ccb *)ccb_h); 4724 } 4725 4726 static void 4727 xpt_acquire_bus(struct cam_eb *bus) 4728 { 4729 4730 xpt_lock_buses(); 4731 bus->refcount++; 4732 xpt_unlock_buses(); 4733 } 4734 4735 static void 4736 xpt_release_bus(struct cam_eb *bus) 4737 { 4738 4739 xpt_lock_buses(); 4740 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4741 if (--bus->refcount > 0) { 4742 xpt_unlock_buses(); 4743 return; 4744 } 4745 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4746 xsoftc.bus_generation++; 4747 xpt_unlock_buses(); 4748 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4749 ("destroying bus, but target list is not empty")); 4750 cam_sim_release(bus->sim); 4751 mtx_destroy(&bus->eb_mtx); 4752 free(bus, M_CAMXPT); 4753 } 4754 4755 static struct cam_et * 4756 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4757 { 4758 struct cam_et *cur_target, *target; 4759 4760 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4761 mtx_assert(&bus->eb_mtx, MA_OWNED); 4762 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4763 M_NOWAIT|M_ZERO); 4764 if (target == NULL) 4765 return (NULL); 4766 4767 TAILQ_INIT(&target->ed_entries); 4768 target->bus = bus; 4769 target->target_id = target_id; 4770 target->refcount = 1; 4771 target->generation = 0; 4772 target->luns = NULL; 4773 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4774 timevalclear(&target->last_reset); 4775 /* 4776 * Hold a reference to our parent bus so it 4777 * will not go away before we do. 4778 */ 4779 bus->refcount++; 4780 4781 /* Insertion sort into our bus's target list */ 4782 cur_target = TAILQ_FIRST(&bus->et_entries); 4783 while (cur_target != NULL && cur_target->target_id < target_id) 4784 cur_target = TAILQ_NEXT(cur_target, links); 4785 if (cur_target != NULL) { 4786 TAILQ_INSERT_BEFORE(cur_target, target, links); 4787 } else { 4788 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4789 } 4790 bus->generation++; 4791 return (target); 4792 } 4793 4794 static void 4795 xpt_acquire_target(struct cam_et *target) 4796 { 4797 struct cam_eb *bus = target->bus; 4798 4799 mtx_lock(&bus->eb_mtx); 4800 target->refcount++; 4801 mtx_unlock(&bus->eb_mtx); 4802 } 4803 4804 static void 4805 xpt_release_target(struct cam_et *target) 4806 { 4807 struct cam_eb *bus = target->bus; 4808 4809 mtx_lock(&bus->eb_mtx); 4810 if (--target->refcount > 0) { 4811 mtx_unlock(&bus->eb_mtx); 4812 return; 4813 } 4814 TAILQ_REMOVE(&bus->et_entries, target, links); 4815 bus->generation++; 4816 mtx_unlock(&bus->eb_mtx); 4817 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4818 ("destroying target, but device list is not empty")); 4819 xpt_release_bus(bus); 4820 mtx_destroy(&target->luns_mtx); 4821 if (target->luns) 4822 free(target->luns, M_CAMXPT); 4823 free(target, M_CAMXPT); 4824 } 4825 4826 static struct cam_ed * 4827 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4828 lun_id_t lun_id) 4829 { 4830 struct cam_ed *device; 4831 4832 device = xpt_alloc_device(bus, target, lun_id); 4833 if (device == NULL) 4834 return (NULL); 4835 4836 device->mintags = 1; 4837 device->maxtags = 1; 4838 return (device); 4839 } 4840 4841 static void 4842 xpt_destroy_device(void *context, int pending) 4843 { 4844 struct cam_ed *device = context; 4845 4846 mtx_lock(&device->device_mtx); 4847 mtx_destroy(&device->device_mtx); 4848 free(device, M_CAMDEV); 4849 } 4850 4851 struct cam_ed * 4852 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4853 { 4854 struct cam_ed *cur_device, *device; 4855 struct cam_devq *devq; 4856 cam_status status; 4857 4858 mtx_assert(&bus->eb_mtx, MA_OWNED); 4859 /* Make space for us in the device queue on our bus */ 4860 devq = bus->sim->devq; 4861 mtx_lock(&devq->send_mtx); 4862 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4863 mtx_unlock(&devq->send_mtx); 4864 if (status != CAM_REQ_CMP) 4865 return (NULL); 4866 4867 device = (struct cam_ed *)malloc(sizeof(*device), 4868 M_CAMDEV, M_NOWAIT|M_ZERO); 4869 if (device == NULL) 4870 return (NULL); 4871 4872 cam_init_pinfo(&device->devq_entry); 4873 device->target = target; 4874 device->lun_id = lun_id; 4875 device->sim = bus->sim; 4876 if (cam_ccbq_init(&device->ccbq, 4877 bus->sim->max_dev_openings) != 0) { 4878 free(device, M_CAMDEV); 4879 return (NULL); 4880 } 4881 SLIST_INIT(&device->asyncs); 4882 SLIST_INIT(&device->periphs); 4883 device->generation = 0; 4884 device->flags = CAM_DEV_UNCONFIGURED; 4885 device->tag_delay_count = 0; 4886 device->tag_saved_openings = 0; 4887 device->refcount = 1; 4888 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4889 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4890 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4891 /* 4892 * Hold a reference to our parent bus so it 4893 * will not go away before we do. 4894 */ 4895 target->refcount++; 4896 4897 cur_device = TAILQ_FIRST(&target->ed_entries); 4898 while (cur_device != NULL && cur_device->lun_id < lun_id) 4899 cur_device = TAILQ_NEXT(cur_device, links); 4900 if (cur_device != NULL) 4901 TAILQ_INSERT_BEFORE(cur_device, device, links); 4902 else 4903 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4904 target->generation++; 4905 return (device); 4906 } 4907 4908 void 4909 xpt_acquire_device(struct cam_ed *device) 4910 { 4911 struct cam_eb *bus = device->target->bus; 4912 4913 mtx_lock(&bus->eb_mtx); 4914 device->refcount++; 4915 mtx_unlock(&bus->eb_mtx); 4916 } 4917 4918 void 4919 xpt_release_device(struct cam_ed *device) 4920 { 4921 struct cam_eb *bus = device->target->bus; 4922 struct cam_devq *devq; 4923 4924 mtx_lock(&bus->eb_mtx); 4925 if (--device->refcount > 0) { 4926 mtx_unlock(&bus->eb_mtx); 4927 return; 4928 } 4929 4930 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4931 device->target->generation++; 4932 mtx_unlock(&bus->eb_mtx); 4933 4934 /* Release our slot in the devq */ 4935 devq = bus->sim->devq; 4936 mtx_lock(&devq->send_mtx); 4937 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4938 4939 KASSERT(SLIST_EMPTY(&device->periphs), 4940 ("destroying device, but periphs list is not empty")); 4941 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4942 ("destroying device while still queued for ccbs")); 4943 4944 /* The send_mtx must be held when accessing the callout */ 4945 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4946 callout_stop(&device->callout); 4947 4948 mtx_unlock(&devq->send_mtx); 4949 4950 xpt_release_target(device->target); 4951 4952 cam_ccbq_fini(&device->ccbq); 4953 /* 4954 * Free allocated memory. free(9) does nothing if the 4955 * supplied pointer is NULL, so it is safe to call without 4956 * checking. 4957 */ 4958 free(device->supported_vpds, M_CAMXPT); 4959 free(device->device_id, M_CAMXPT); 4960 free(device->ext_inq, M_CAMXPT); 4961 free(device->physpath, M_CAMXPT); 4962 free(device->rcap_buf, M_CAMXPT); 4963 free(device->serial_num, M_CAMXPT); 4964 free(device->nvme_data, M_CAMXPT); 4965 free(device->nvme_cdata, M_CAMXPT); 4966 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 4967 } 4968 4969 u_int32_t 4970 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4971 { 4972 int result; 4973 struct cam_ed *dev; 4974 4975 dev = path->device; 4976 mtx_lock(&dev->sim->devq->send_mtx); 4977 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4978 mtx_unlock(&dev->sim->devq->send_mtx); 4979 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4980 || (dev->inq_flags & SID_CmdQue) != 0) 4981 dev->tag_saved_openings = newopenings; 4982 return (result); 4983 } 4984 4985 static struct cam_eb * 4986 xpt_find_bus(path_id_t path_id) 4987 { 4988 struct cam_eb *bus; 4989 4990 xpt_lock_buses(); 4991 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4992 bus != NULL; 4993 bus = TAILQ_NEXT(bus, links)) { 4994 if (bus->path_id == path_id) { 4995 bus->refcount++; 4996 break; 4997 } 4998 } 4999 xpt_unlock_buses(); 5000 return (bus); 5001 } 5002 5003 static struct cam_et * 5004 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5005 { 5006 struct cam_et *target; 5007 5008 mtx_assert(&bus->eb_mtx, MA_OWNED); 5009 for (target = TAILQ_FIRST(&bus->et_entries); 5010 target != NULL; 5011 target = TAILQ_NEXT(target, links)) { 5012 if (target->target_id == target_id) { 5013 target->refcount++; 5014 break; 5015 } 5016 } 5017 return (target); 5018 } 5019 5020 static struct cam_ed * 5021 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5022 { 5023 struct cam_ed *device; 5024 5025 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 5026 for (device = TAILQ_FIRST(&target->ed_entries); 5027 device != NULL; 5028 device = TAILQ_NEXT(device, links)) { 5029 if (device->lun_id == lun_id) { 5030 device->refcount++; 5031 break; 5032 } 5033 } 5034 return (device); 5035 } 5036 5037 void 5038 xpt_start_tags(struct cam_path *path) 5039 { 5040 struct ccb_relsim crs; 5041 struct cam_ed *device; 5042 struct cam_sim *sim; 5043 int newopenings; 5044 5045 device = path->device; 5046 sim = path->bus->sim; 5047 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5048 xpt_freeze_devq(path, /*count*/1); 5049 device->inq_flags |= SID_CmdQue; 5050 if (device->tag_saved_openings != 0) 5051 newopenings = device->tag_saved_openings; 5052 else 5053 newopenings = min(device->maxtags, 5054 sim->max_tagged_dev_openings); 5055 xpt_dev_ccbq_resize(path, newopenings); 5056 xpt_async(AC_GETDEV_CHANGED, path, NULL); 5057 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 5058 crs.ccb_h.func_code = XPT_REL_SIMQ; 5059 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5060 crs.openings 5061 = crs.release_timeout 5062 = crs.qfrozen_cnt 5063 = 0; 5064 xpt_action((union ccb *)&crs); 5065 } 5066 5067 void 5068 xpt_stop_tags(struct cam_path *path) 5069 { 5070 struct ccb_relsim crs; 5071 struct cam_ed *device; 5072 struct cam_sim *sim; 5073 5074 device = path->device; 5075 sim = path->bus->sim; 5076 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5077 device->tag_delay_count = 0; 5078 xpt_freeze_devq(path, /*count*/1); 5079 device->inq_flags &= ~SID_CmdQue; 5080 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 5081 xpt_async(AC_GETDEV_CHANGED, path, NULL); 5082 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 5083 crs.ccb_h.func_code = XPT_REL_SIMQ; 5084 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5085 crs.openings 5086 = crs.release_timeout 5087 = crs.qfrozen_cnt 5088 = 0; 5089 xpt_action((union ccb *)&crs); 5090 } 5091 5092 /* 5093 * Assume all possible buses are detected by this time, so allow boot 5094 * as soon as they all are scanned. 5095 */ 5096 static void 5097 xpt_boot_delay(void *arg) 5098 { 5099 5100 xpt_release_boot(); 5101 } 5102 5103 /* 5104 * Now that all config hooks have completed, start boot_delay timer, 5105 * waiting for possibly still undetected buses (USB) to appear. 5106 */ 5107 static void 5108 xpt_ch_done(void *arg) 5109 { 5110 5111 callout_init(&xsoftc.boot_callout, 1); 5112 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0, 5113 xpt_boot_delay, NULL, 0); 5114 } 5115 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL); 5116 5117 /* 5118 * Now that interrupts are enabled, go find our devices 5119 */ 5120 static void 5121 xpt_config(void *arg) 5122 { 5123 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 5124 printf("xpt_config: failed to create taskqueue thread.\n"); 5125 5126 /* Setup debugging path */ 5127 if (cam_dflags != CAM_DEBUG_NONE) { 5128 if (xpt_create_path(&cam_dpath, NULL, 5129 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 5130 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 5131 printf("xpt_config: xpt_create_path() failed for debug" 5132 " target %d:%d:%d, debugging disabled\n", 5133 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 5134 cam_dflags = CAM_DEBUG_NONE; 5135 } 5136 } else 5137 cam_dpath = NULL; 5138 5139 periphdriver_init(1); 5140 xpt_hold_boot(); 5141 5142 /* Fire up rescan thread. */ 5143 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 5144 "cam", "scanner")) { 5145 printf("xpt_config: failed to create rescan thread.\n"); 5146 } 5147 } 5148 5149 void 5150 xpt_hold_boot_locked(void) 5151 { 5152 5153 if (xsoftc.buses_to_config++ == 0) 5154 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount); 5155 } 5156 5157 void 5158 xpt_hold_boot(void) 5159 { 5160 5161 xpt_lock_buses(); 5162 xpt_hold_boot_locked(); 5163 xpt_unlock_buses(); 5164 } 5165 5166 void 5167 xpt_release_boot(void) 5168 { 5169 5170 xpt_lock_buses(); 5171 if (--xsoftc.buses_to_config == 0) { 5172 if (xsoftc.buses_config_done == 0) { 5173 xsoftc.buses_config_done = 1; 5174 xsoftc.buses_to_config++; 5175 TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task, 5176 NULL); 5177 taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task); 5178 } else 5179 root_mount_rel(&xsoftc.xpt_rootmount); 5180 } 5181 xpt_unlock_buses(); 5182 } 5183 5184 /* 5185 * If the given device only has one peripheral attached to it, and if that 5186 * peripheral is the passthrough driver, announce it. This insures that the 5187 * user sees some sort of announcement for every peripheral in their system. 5188 */ 5189 static int 5190 xptpassannouncefunc(struct cam_ed *device, void *arg) 5191 { 5192 struct cam_periph *periph; 5193 int i; 5194 5195 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5196 periph = SLIST_NEXT(periph, periph_links), i++); 5197 5198 periph = SLIST_FIRST(&device->periphs); 5199 if ((i == 1) 5200 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5201 xpt_announce_periph(periph, NULL); 5202 5203 return(1); 5204 } 5205 5206 static void 5207 xpt_finishconfig_task(void *context, int pending) 5208 { 5209 5210 periphdriver_init(2); 5211 /* 5212 * Check for devices with no "standard" peripheral driver 5213 * attached. For any devices like that, announce the 5214 * passthrough driver so the user will see something. 5215 */ 5216 if (!bootverbose) 5217 xpt_for_all_devices(xptpassannouncefunc, NULL); 5218 5219 xpt_release_boot(); 5220 } 5221 5222 cam_status 5223 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5224 struct cam_path *path) 5225 { 5226 struct ccb_setasync csa; 5227 cam_status status; 5228 int xptpath = 0; 5229 5230 if (path == NULL) { 5231 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5232 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5233 if (status != CAM_REQ_CMP) 5234 return (status); 5235 xpt_path_lock(path); 5236 xptpath = 1; 5237 } 5238 5239 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5240 csa.ccb_h.func_code = XPT_SASYNC_CB; 5241 csa.event_enable = event; 5242 csa.callback = cbfunc; 5243 csa.callback_arg = cbarg; 5244 xpt_action((union ccb *)&csa); 5245 status = csa.ccb_h.status; 5246 5247 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE, 5248 ("xpt_register_async: func %p\n", cbfunc)); 5249 5250 if (xptpath) { 5251 xpt_path_unlock(path); 5252 xpt_free_path(path); 5253 } 5254 5255 if ((status == CAM_REQ_CMP) && 5256 (csa.event_enable & AC_FOUND_DEVICE)) { 5257 /* 5258 * Get this peripheral up to date with all 5259 * the currently existing devices. 5260 */ 5261 xpt_for_all_devices(xptsetasyncfunc, &csa); 5262 } 5263 if ((status == CAM_REQ_CMP) && 5264 (csa.event_enable & AC_PATH_REGISTERED)) { 5265 /* 5266 * Get this peripheral up to date with all 5267 * the currently existing buses. 5268 */ 5269 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5270 } 5271 5272 return (status); 5273 } 5274 5275 static void 5276 xptaction(struct cam_sim *sim, union ccb *work_ccb) 5277 { 5278 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5279 5280 switch (work_ccb->ccb_h.func_code) { 5281 /* Common cases first */ 5282 case XPT_PATH_INQ: /* Path routing inquiry */ 5283 { 5284 struct ccb_pathinq *cpi; 5285 5286 cpi = &work_ccb->cpi; 5287 cpi->version_num = 1; /* XXX??? */ 5288 cpi->hba_inquiry = 0; 5289 cpi->target_sprt = 0; 5290 cpi->hba_misc = 0; 5291 cpi->hba_eng_cnt = 0; 5292 cpi->max_target = 0; 5293 cpi->max_lun = 0; 5294 cpi->initiator_id = 0; 5295 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5296 strlcpy(cpi->hba_vid, "", HBA_IDLEN); 5297 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5298 cpi->unit_number = sim->unit_number; 5299 cpi->bus_id = sim->bus_id; 5300 cpi->base_transfer_speed = 0; 5301 cpi->protocol = PROTO_UNSPECIFIED; 5302 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5303 cpi->transport = XPORT_UNSPECIFIED; 5304 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5305 cpi->ccb_h.status = CAM_REQ_CMP; 5306 break; 5307 } 5308 default: 5309 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5310 break; 5311 } 5312 xpt_done(work_ccb); 5313 } 5314 5315 /* 5316 * The xpt as a "controller" has no interrupt sources, so polling 5317 * is a no-op. 5318 */ 5319 static void 5320 xptpoll(struct cam_sim *sim) 5321 { 5322 } 5323 5324 void 5325 xpt_lock_buses(void) 5326 { 5327 mtx_lock(&xsoftc.xpt_topo_lock); 5328 } 5329 5330 void 5331 xpt_unlock_buses(void) 5332 { 5333 mtx_unlock(&xsoftc.xpt_topo_lock); 5334 } 5335 5336 struct mtx * 5337 xpt_path_mtx(struct cam_path *path) 5338 { 5339 5340 return (&path->device->device_mtx); 5341 } 5342 5343 static void 5344 xpt_done_process(struct ccb_hdr *ccb_h) 5345 { 5346 struct cam_sim *sim = NULL; 5347 struct cam_devq *devq = NULL; 5348 struct mtx *mtx = NULL; 5349 5350 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 5351 struct ccb_scsiio *csio; 5352 5353 if (ccb_h->func_code == XPT_SCSI_IO) { 5354 csio = &((union ccb *)ccb_h)->csio; 5355 if (csio->bio != NULL) 5356 biotrack(csio->bio, __func__); 5357 } 5358 #endif 5359 5360 if (ccb_h->flags & CAM_HIGH_POWER) { 5361 struct highpowerlist *hphead; 5362 struct cam_ed *device; 5363 5364 mtx_lock(&xsoftc.xpt_highpower_lock); 5365 hphead = &xsoftc.highpowerq; 5366 5367 device = STAILQ_FIRST(hphead); 5368 5369 /* 5370 * Increment the count since this command is done. 5371 */ 5372 xsoftc.num_highpower++; 5373 5374 /* 5375 * Any high powered commands queued up? 5376 */ 5377 if (device != NULL) { 5378 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5379 mtx_unlock(&xsoftc.xpt_highpower_lock); 5380 5381 mtx_lock(&device->sim->devq->send_mtx); 5382 xpt_release_devq_device(device, 5383 /*count*/1, /*runqueue*/TRUE); 5384 mtx_unlock(&device->sim->devq->send_mtx); 5385 } else 5386 mtx_unlock(&xsoftc.xpt_highpower_lock); 5387 } 5388 5389 /* 5390 * Insulate against a race where the periph is destroyed but CCBs are 5391 * still not all processed. This shouldn't happen, but allows us better 5392 * bug diagnostic when it does. 5393 */ 5394 if (ccb_h->path->bus) 5395 sim = ccb_h->path->bus->sim; 5396 5397 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5398 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request")); 5399 xpt_release_simq(sim, /*run_queue*/FALSE); 5400 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5401 } 5402 5403 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5404 && (ccb_h->status & CAM_DEV_QFRZN)) { 5405 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5406 ccb_h->status &= ~CAM_DEV_QFRZN; 5407 } 5408 5409 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5410 struct cam_ed *dev = ccb_h->path->device; 5411 5412 if (sim) 5413 devq = sim->devq; 5414 KASSERT(devq, ("Periph disappeared with CCB %p %s request pending.", 5415 ccb_h, xpt_action_name(ccb_h->func_code))); 5416 5417 mtx_lock(&devq->send_mtx); 5418 devq->send_active--; 5419 devq->send_openings++; 5420 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5421 5422 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5423 && (dev->ccbq.dev_active == 0))) { 5424 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5425 xpt_release_devq_device(dev, /*count*/1, 5426 /*run_queue*/FALSE); 5427 } 5428 5429 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5430 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5431 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5432 xpt_release_devq_device(dev, /*count*/1, 5433 /*run_queue*/FALSE); 5434 } 5435 5436 if (!device_is_queued(dev)) 5437 (void)xpt_schedule_devq(devq, dev); 5438 xpt_run_devq(devq); 5439 mtx_unlock(&devq->send_mtx); 5440 5441 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5442 mtx = xpt_path_mtx(ccb_h->path); 5443 mtx_lock(mtx); 5444 5445 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5446 && (--dev->tag_delay_count == 0)) 5447 xpt_start_tags(ccb_h->path); 5448 } 5449 } 5450 5451 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5452 if (mtx == NULL) { 5453 mtx = xpt_path_mtx(ccb_h->path); 5454 mtx_lock(mtx); 5455 } 5456 } else { 5457 if (mtx != NULL) { 5458 mtx_unlock(mtx); 5459 mtx = NULL; 5460 } 5461 } 5462 5463 /* Call the peripheral driver's callback */ 5464 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5465 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5466 if (mtx != NULL) 5467 mtx_unlock(mtx); 5468 } 5469 5470 void 5471 xpt_done_td(void *arg) 5472 { 5473 struct cam_doneq *queue = arg; 5474 struct ccb_hdr *ccb_h; 5475 STAILQ_HEAD(, ccb_hdr) doneq; 5476 5477 STAILQ_INIT(&doneq); 5478 mtx_lock(&queue->cam_doneq_mtx); 5479 while (1) { 5480 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5481 queue->cam_doneq_sleep = 1; 5482 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5483 PRIBIO, "-", 0); 5484 queue->cam_doneq_sleep = 0; 5485 } 5486 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5487 mtx_unlock(&queue->cam_doneq_mtx); 5488 5489 THREAD_NO_SLEEPING(); 5490 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5491 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5492 xpt_done_process(ccb_h); 5493 } 5494 THREAD_SLEEPING_OK(); 5495 5496 mtx_lock(&queue->cam_doneq_mtx); 5497 } 5498 } 5499 5500 static void 5501 camisr_runqueue(void) 5502 { 5503 struct ccb_hdr *ccb_h; 5504 struct cam_doneq *queue; 5505 int i; 5506 5507 /* Process global queues. */ 5508 for (i = 0; i < cam_num_doneqs; i++) { 5509 queue = &cam_doneqs[i]; 5510 mtx_lock(&queue->cam_doneq_mtx); 5511 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5512 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5513 mtx_unlock(&queue->cam_doneq_mtx); 5514 xpt_done_process(ccb_h); 5515 mtx_lock(&queue->cam_doneq_mtx); 5516 } 5517 mtx_unlock(&queue->cam_doneq_mtx); 5518 } 5519 } 5520 5521 struct kv 5522 { 5523 uint32_t v; 5524 const char *name; 5525 }; 5526 5527 static struct kv map[] = { 5528 { XPT_NOOP, "XPT_NOOP" }, 5529 { XPT_SCSI_IO, "XPT_SCSI_IO" }, 5530 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" }, 5531 { XPT_GDEVLIST, "XPT_GDEVLIST" }, 5532 { XPT_PATH_INQ, "XPT_PATH_INQ" }, 5533 { XPT_REL_SIMQ, "XPT_REL_SIMQ" }, 5534 { XPT_SASYNC_CB, "XPT_SASYNC_CB" }, 5535 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" }, 5536 { XPT_SCAN_BUS, "XPT_SCAN_BUS" }, 5537 { XPT_DEV_MATCH, "XPT_DEV_MATCH" }, 5538 { XPT_DEBUG, "XPT_DEBUG" }, 5539 { XPT_PATH_STATS, "XPT_PATH_STATS" }, 5540 { XPT_GDEV_STATS, "XPT_GDEV_STATS" }, 5541 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" }, 5542 { XPT_ASYNC, "XPT_ASYNC" }, 5543 { XPT_ABORT, "XPT_ABORT" }, 5544 { XPT_RESET_BUS, "XPT_RESET_BUS" }, 5545 { XPT_RESET_DEV, "XPT_RESET_DEV" }, 5546 { XPT_TERM_IO, "XPT_TERM_IO" }, 5547 { XPT_SCAN_LUN, "XPT_SCAN_LUN" }, 5548 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" }, 5549 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" }, 5550 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" }, 5551 { XPT_ATA_IO, "XPT_ATA_IO" }, 5552 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" }, 5553 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" }, 5554 { XPT_NVME_IO, "XPT_NVME_IO" }, 5555 { XPT_MMC_IO, "XPT_MMC_IO" }, 5556 { XPT_SMP_IO, "XPT_SMP_IO" }, 5557 { XPT_SCAN_TGT, "XPT_SCAN_TGT" }, 5558 { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" }, 5559 { XPT_ENG_INQ, "XPT_ENG_INQ" }, 5560 { XPT_ENG_EXEC, "XPT_ENG_EXEC" }, 5561 { XPT_EN_LUN, "XPT_EN_LUN" }, 5562 { XPT_TARGET_IO, "XPT_TARGET_IO" }, 5563 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" }, 5564 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" }, 5565 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" }, 5566 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" }, 5567 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" }, 5568 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" }, 5569 { 0, 0 } 5570 }; 5571 5572 const char * 5573 xpt_action_name(uint32_t action) 5574 { 5575 static char buffer[32]; /* Only for unknown messages -- racy */ 5576 struct kv *walker = map; 5577 5578 while (walker->name != NULL) { 5579 if (walker->v == action) 5580 return (walker->name); 5581 walker++; 5582 } 5583 5584 snprintf(buffer, sizeof(buffer), "%#x", action); 5585 return (buffer); 5586 }
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