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/md_var.h> /* geometry translation */ 75 #include <machine/stdarg.h> /* for xpt_print below */ 76 77 #include "opt_cam.h" 78 79 /* Wild guess based on not wanting to grow the stack too much */ 80 #define XPT_PRINT_MAXLEN 512 81 #ifdef PRINTF_BUFR_SIZE 82 #define XPT_PRINT_LEN PRINTF_BUFR_SIZE 83 #else 84 #define XPT_PRINT_LEN 128 85 #endif 86 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large"); 87 88 /* 89 * This is the maximum number of high powered commands (e.g. start unit) 90 * that can be outstanding at a particular time. 91 */ 92 #ifndef CAM_MAX_HIGHPOWER 93 #define CAM_MAX_HIGHPOWER 4 94 #endif 95 96 /* Datastructures internal to the xpt layer */ 97 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 98 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 99 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 100 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 101 102 struct xpt_softc { 103 uint32_t xpt_generation; 104 105 /* number of high powered commands that can go through right now */ 106 struct mtx xpt_highpower_lock; 107 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 108 int num_highpower; 109 110 /* queue for handling async rescan requests. */ 111 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 112 int buses_to_config; 113 int buses_config_done; 114 int announce_nosbuf; 115 116 /* 117 * Registered buses 118 * 119 * N.B., "busses" is an archaic spelling of "buses". In new code 120 * "buses" is preferred. 121 */ 122 TAILQ_HEAD(,cam_eb) xpt_busses; 123 u_int bus_generation; 124 125 int boot_delay; 126 struct callout boot_callout; 127 struct task boot_task; 128 struct root_hold_token xpt_rootmount; 129 130 struct mtx xpt_topo_lock; 131 struct taskqueue *xpt_taskq; 132 }; 133 134 typedef enum { 135 DM_RET_COPY = 0x01, 136 DM_RET_FLAG_MASK = 0x0f, 137 DM_RET_NONE = 0x00, 138 DM_RET_STOP = 0x10, 139 DM_RET_DESCEND = 0x20, 140 DM_RET_ERROR = 0x30, 141 DM_RET_ACTION_MASK = 0xf0 142 } dev_match_ret; 143 144 typedef enum { 145 XPT_DEPTH_BUS, 146 XPT_DEPTH_TARGET, 147 XPT_DEPTH_DEVICE, 148 XPT_DEPTH_PERIPH 149 } xpt_traverse_depth; 150 151 struct xpt_traverse_config { 152 xpt_traverse_depth depth; 153 void *tr_func; 154 void *tr_arg; 155 }; 156 157 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 158 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 159 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 160 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 161 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 162 163 /* Transport layer configuration information */ 164 static struct xpt_softc xsoftc; 165 166 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF); 167 168 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 169 &xsoftc.boot_delay, 0, "Bus registration wait time"); 170 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD, 171 &xsoftc.xpt_generation, 0, "CAM peripheral generation count"); 172 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN, 173 &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements"); 174 175 struct cam_doneq { 176 struct mtx_padalign cam_doneq_mtx; 177 STAILQ_HEAD(, ccb_hdr) cam_doneq; 178 int cam_doneq_sleep; 179 }; 180 181 static struct cam_doneq cam_doneqs[MAXCPU]; 182 static int cam_num_doneqs; 183 static struct proc *cam_proc; 184 185 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 186 &cam_num_doneqs, 0, "Number of completion queues/threads"); 187 188 struct cam_periph *xpt_periph; 189 190 static periph_init_t xpt_periph_init; 191 192 static struct periph_driver xpt_driver = 193 { 194 xpt_periph_init, "xpt", 195 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 196 CAM_PERIPH_DRV_EARLY 197 }; 198 199 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 200 201 static d_open_t xptopen; 202 static d_close_t xptclose; 203 static d_ioctl_t xptioctl; 204 static d_ioctl_t xptdoioctl; 205 206 static struct cdevsw xpt_cdevsw = { 207 .d_version = D_VERSION, 208 .d_flags = 0, 209 .d_open = xptopen, 210 .d_close = xptclose, 211 .d_ioctl = xptioctl, 212 .d_name = "xpt", 213 }; 214 215 /* Storage for debugging datastructures */ 216 struct cam_path *cam_dpath; 217 u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS; 218 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN, 219 &cam_dflags, 0, "Enabled debug flags"); 220 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 221 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN, 222 &cam_debug_delay, 0, "Delay in us after each debug message"); 223 224 /* Our boot-time initialization hook */ 225 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 226 227 static moduledata_t cam_moduledata = { 228 "cam", 229 cam_module_event_handler, 230 NULL 231 }; 232 233 static int xpt_init(void *); 234 235 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 236 MODULE_VERSION(cam, 1); 237 238 239 static void xpt_async_bcast(struct async_list *async_head, 240 u_int32_t async_code, 241 struct cam_path *path, 242 void *async_arg); 243 static path_id_t xptnextfreepathid(void); 244 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 245 static union ccb *xpt_get_ccb(struct cam_periph *periph); 246 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 247 static void xpt_run_allocq(struct cam_periph *periph, int sleep); 248 static void xpt_run_allocq_task(void *context, int pending); 249 static void xpt_run_devq(struct cam_devq *devq); 250 static callout_func_t xpt_release_devq_timeout; 251 static void xpt_release_simq_timeout(void *arg) __unused; 252 static void xpt_acquire_bus(struct cam_eb *bus); 253 static void xpt_release_bus(struct cam_eb *bus); 254 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 255 static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 256 int run_queue); 257 static struct cam_et* 258 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 259 static void xpt_acquire_target(struct cam_et *target); 260 static void xpt_release_target(struct cam_et *target); 261 static struct cam_eb* 262 xpt_find_bus(path_id_t path_id); 263 static struct cam_et* 264 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 265 static struct cam_ed* 266 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 267 static void xpt_config(void *arg); 268 static void xpt_hold_boot_locked(void); 269 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 270 u_int32_t new_priority); 271 static xpt_devicefunc_t xptpassannouncefunc; 272 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 273 static void xptpoll(struct cam_sim *sim); 274 static void camisr_runqueue(void); 275 static void xpt_done_process(struct ccb_hdr *ccb_h); 276 static void xpt_done_td(void *); 277 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 278 u_int num_patterns, struct cam_eb *bus); 279 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 280 u_int num_patterns, 281 struct cam_ed *device); 282 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 283 u_int num_patterns, 284 struct cam_periph *periph); 285 static xpt_busfunc_t xptedtbusfunc; 286 static xpt_targetfunc_t xptedttargetfunc; 287 static xpt_devicefunc_t xptedtdevicefunc; 288 static xpt_periphfunc_t xptedtperiphfunc; 289 static xpt_pdrvfunc_t xptplistpdrvfunc; 290 static xpt_periphfunc_t xptplistperiphfunc; 291 static int xptedtmatch(struct ccb_dev_match *cdm); 292 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 293 static int xptbustraverse(struct cam_eb *start_bus, 294 xpt_busfunc_t *tr_func, void *arg); 295 static int xpttargettraverse(struct cam_eb *bus, 296 struct cam_et *start_target, 297 xpt_targetfunc_t *tr_func, void *arg); 298 static int xptdevicetraverse(struct cam_et *target, 299 struct cam_ed *start_device, 300 xpt_devicefunc_t *tr_func, void *arg); 301 static int xptperiphtraverse(struct cam_ed *device, 302 struct cam_periph *start_periph, 303 xpt_periphfunc_t *tr_func, void *arg); 304 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 305 xpt_pdrvfunc_t *tr_func, void *arg); 306 static int xptpdperiphtraverse(struct periph_driver **pdrv, 307 struct cam_periph *start_periph, 308 xpt_periphfunc_t *tr_func, 309 void *arg); 310 static xpt_busfunc_t xptdefbusfunc; 311 static xpt_targetfunc_t xptdeftargetfunc; 312 static xpt_devicefunc_t xptdefdevicefunc; 313 static xpt_periphfunc_t xptdefperiphfunc; 314 static void xpt_finishconfig_task(void *context, int pending); 315 static void xpt_dev_async_default(u_int32_t async_code, 316 struct cam_eb *bus, 317 struct cam_et *target, 318 struct cam_ed *device, 319 void *async_arg); 320 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 321 struct cam_et *target, 322 lun_id_t lun_id); 323 static xpt_devicefunc_t xptsetasyncfunc; 324 static xpt_busfunc_t xptsetasyncbusfunc; 325 static cam_status xptregister(struct cam_periph *periph, 326 void *arg); 327 static __inline int device_is_queued(struct cam_ed *device); 328 329 static __inline int 330 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 331 { 332 int retval; 333 334 mtx_assert(&devq->send_mtx, MA_OWNED); 335 if ((dev->ccbq.queue.entries > 0) && 336 (dev->ccbq.dev_openings > 0) && 337 (dev->ccbq.queue.qfrozen_cnt == 0)) { 338 /* 339 * The priority of a device waiting for controller 340 * resources is that of the highest priority CCB 341 * enqueued. 342 */ 343 retval = 344 xpt_schedule_dev(&devq->send_queue, 345 &dev->devq_entry, 346 CAMQ_GET_PRIO(&dev->ccbq.queue)); 347 } else { 348 retval = 0; 349 } 350 return (retval); 351 } 352 353 static __inline int 354 device_is_queued(struct cam_ed *device) 355 { 356 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 357 } 358 359 static void 360 xpt_periph_init() 361 { 362 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 363 } 364 365 static int 366 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 367 { 368 369 /* 370 * Only allow read-write access. 371 */ 372 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 373 return(EPERM); 374 375 /* 376 * We don't allow nonblocking access. 377 */ 378 if ((flags & O_NONBLOCK) != 0) { 379 printf("%s: can't do nonblocking access\n", devtoname(dev)); 380 return(ENODEV); 381 } 382 383 return(0); 384 } 385 386 static int 387 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 388 { 389 390 return(0); 391 } 392 393 /* 394 * Don't automatically grab the xpt softc lock here even though this is going 395 * through the xpt device. The xpt device is really just a back door for 396 * accessing other devices and SIMs, so the right thing to do is to grab 397 * the appropriate SIM lock once the bus/SIM is located. 398 */ 399 static int 400 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 401 { 402 int error; 403 404 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 405 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 406 } 407 return (error); 408 } 409 410 static int 411 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 412 { 413 int error; 414 415 error = 0; 416 417 switch(cmd) { 418 /* 419 * For the transport layer CAMIOCOMMAND ioctl, we really only want 420 * to accept CCB types that don't quite make sense to send through a 421 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 422 * in the CAM spec. 423 */ 424 case CAMIOCOMMAND: { 425 union ccb *ccb; 426 union ccb *inccb; 427 struct cam_eb *bus; 428 429 inccb = (union ccb *)addr; 430 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 431 if (inccb->ccb_h.func_code == XPT_SCSI_IO) 432 inccb->csio.bio = NULL; 433 #endif 434 435 if (inccb->ccb_h.flags & CAM_UNLOCKED) 436 return (EINVAL); 437 438 bus = xpt_find_bus(inccb->ccb_h.path_id); 439 if (bus == NULL) 440 return (EINVAL); 441 442 switch (inccb->ccb_h.func_code) { 443 case XPT_SCAN_BUS: 444 case XPT_RESET_BUS: 445 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 446 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 447 xpt_release_bus(bus); 448 return (EINVAL); 449 } 450 break; 451 case XPT_SCAN_TGT: 452 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 453 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 454 xpt_release_bus(bus); 455 return (EINVAL); 456 } 457 break; 458 default: 459 break; 460 } 461 462 switch(inccb->ccb_h.func_code) { 463 case XPT_SCAN_BUS: 464 case XPT_RESET_BUS: 465 case XPT_PATH_INQ: 466 case XPT_ENG_INQ: 467 case XPT_SCAN_LUN: 468 case XPT_SCAN_TGT: 469 470 ccb = xpt_alloc_ccb(); 471 472 /* 473 * Create a path using the bus, target, and lun the 474 * user passed in. 475 */ 476 if (xpt_create_path(&ccb->ccb_h.path, NULL, 477 inccb->ccb_h.path_id, 478 inccb->ccb_h.target_id, 479 inccb->ccb_h.target_lun) != 480 CAM_REQ_CMP){ 481 error = EINVAL; 482 xpt_free_ccb(ccb); 483 break; 484 } 485 /* Ensure all of our fields are correct */ 486 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 487 inccb->ccb_h.pinfo.priority); 488 xpt_merge_ccb(ccb, inccb); 489 xpt_path_lock(ccb->ccb_h.path); 490 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 491 xpt_path_unlock(ccb->ccb_h.path); 492 bcopy(ccb, inccb, sizeof(union ccb)); 493 xpt_free_path(ccb->ccb_h.path); 494 xpt_free_ccb(ccb); 495 break; 496 497 case XPT_DEBUG: { 498 union ccb ccb; 499 500 /* 501 * This is an immediate CCB, so it's okay to 502 * allocate it on the stack. 503 */ 504 505 /* 506 * Create a path using the bus, target, and lun the 507 * user passed in. 508 */ 509 if (xpt_create_path(&ccb.ccb_h.path, NULL, 510 inccb->ccb_h.path_id, 511 inccb->ccb_h.target_id, 512 inccb->ccb_h.target_lun) != 513 CAM_REQ_CMP){ 514 error = EINVAL; 515 break; 516 } 517 /* Ensure all of our fields are correct */ 518 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 519 inccb->ccb_h.pinfo.priority); 520 xpt_merge_ccb(&ccb, inccb); 521 xpt_action(&ccb); 522 bcopy(&ccb, inccb, sizeof(union ccb)); 523 xpt_free_path(ccb.ccb_h.path); 524 break; 525 526 } 527 case XPT_DEV_MATCH: { 528 struct cam_periph_map_info mapinfo; 529 struct cam_path *old_path; 530 531 /* 532 * We can't deal with physical addresses for this 533 * type of transaction. 534 */ 535 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 536 CAM_DATA_VADDR) { 537 error = EINVAL; 538 break; 539 } 540 541 /* 542 * Save this in case the caller had it set to 543 * something in particular. 544 */ 545 old_path = inccb->ccb_h.path; 546 547 /* 548 * We really don't need a path for the matching 549 * code. The path is needed because of the 550 * debugging statements in xpt_action(). They 551 * assume that the CCB has a valid path. 552 */ 553 inccb->ccb_h.path = xpt_periph->path; 554 555 bzero(&mapinfo, sizeof(mapinfo)); 556 557 /* 558 * Map the pattern and match buffers into kernel 559 * virtual address space. 560 */ 561 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS); 562 563 if (error) { 564 inccb->ccb_h.path = old_path; 565 break; 566 } 567 568 /* 569 * This is an immediate CCB, we can send it on directly. 570 */ 571 xpt_action(inccb); 572 573 /* 574 * Map the buffers back into user space. 575 */ 576 cam_periph_unmapmem(inccb, &mapinfo); 577 578 inccb->ccb_h.path = old_path; 579 580 error = 0; 581 break; 582 } 583 default: 584 error = ENOTSUP; 585 break; 586 } 587 xpt_release_bus(bus); 588 break; 589 } 590 /* 591 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 592 * with the periphal driver name and unit name filled in. The other 593 * fields don't really matter as input. The passthrough driver name 594 * ("pass"), and unit number are passed back in the ccb. The current 595 * device generation number, and the index into the device peripheral 596 * driver list, and the status are also passed back. Note that 597 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 598 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 599 * (or rather should be) impossible for the device peripheral driver 600 * list to change since we look at the whole thing in one pass, and 601 * we do it with lock protection. 602 * 603 */ 604 case CAMGETPASSTHRU: { 605 union ccb *ccb; 606 struct cam_periph *periph; 607 struct periph_driver **p_drv; 608 char *name; 609 u_int unit; 610 int base_periph_found; 611 612 ccb = (union ccb *)addr; 613 unit = ccb->cgdl.unit_number; 614 name = ccb->cgdl.periph_name; 615 base_periph_found = 0; 616 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 617 if (ccb->ccb_h.func_code == XPT_SCSI_IO) 618 ccb->csio.bio = NULL; 619 #endif 620 621 /* 622 * Sanity check -- make sure we don't get a null peripheral 623 * driver name. 624 */ 625 if (*ccb->cgdl.periph_name == '\0') { 626 error = EINVAL; 627 break; 628 } 629 630 /* Keep the list from changing while we traverse it */ 631 xpt_lock_buses(); 632 633 /* first find our driver in the list of drivers */ 634 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 635 if (strcmp((*p_drv)->driver_name, name) == 0) 636 break; 637 638 if (*p_drv == NULL) { 639 xpt_unlock_buses(); 640 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 641 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 642 *ccb->cgdl.periph_name = '\0'; 643 ccb->cgdl.unit_number = 0; 644 error = ENOENT; 645 break; 646 } 647 648 /* 649 * Run through every peripheral instance of this driver 650 * and check to see whether it matches the unit passed 651 * in by the user. If it does, get out of the loops and 652 * find the passthrough driver associated with that 653 * peripheral driver. 654 */ 655 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 656 periph = TAILQ_NEXT(periph, unit_links)) { 657 658 if (periph->unit_number == unit) 659 break; 660 } 661 /* 662 * If we found the peripheral driver that the user passed 663 * in, go through all of the peripheral drivers for that 664 * particular device and look for a passthrough driver. 665 */ 666 if (periph != NULL) { 667 struct cam_ed *device; 668 int i; 669 670 base_periph_found = 1; 671 device = periph->path->device; 672 for (i = 0, periph = SLIST_FIRST(&device->periphs); 673 periph != NULL; 674 periph = SLIST_NEXT(periph, periph_links), i++) { 675 /* 676 * Check to see whether we have a 677 * passthrough device or not. 678 */ 679 if (strcmp(periph->periph_name, "pass") == 0) { 680 /* 681 * Fill in the getdevlist fields. 682 */ 683 strlcpy(ccb->cgdl.periph_name, 684 periph->periph_name, 685 sizeof(ccb->cgdl.periph_name)); 686 ccb->cgdl.unit_number = 687 periph->unit_number; 688 if (SLIST_NEXT(periph, periph_links)) 689 ccb->cgdl.status = 690 CAM_GDEVLIST_MORE_DEVS; 691 else 692 ccb->cgdl.status = 693 CAM_GDEVLIST_LAST_DEVICE; 694 ccb->cgdl.generation = 695 device->generation; 696 ccb->cgdl.index = i; 697 /* 698 * Fill in some CCB header fields 699 * that the user may want. 700 */ 701 ccb->ccb_h.path_id = 702 periph->path->bus->path_id; 703 ccb->ccb_h.target_id = 704 periph->path->target->target_id; 705 ccb->ccb_h.target_lun = 706 periph->path->device->lun_id; 707 ccb->ccb_h.status = CAM_REQ_CMP; 708 break; 709 } 710 } 711 } 712 713 /* 714 * If the periph is null here, one of two things has 715 * happened. The first possibility is that we couldn't 716 * find the unit number of the particular peripheral driver 717 * that the user is asking about. e.g. the user asks for 718 * the passthrough driver for "da11". We find the list of 719 * "da" peripherals all right, but there is no unit 11. 720 * The other possibility is that we went through the list 721 * of peripheral drivers attached to the device structure, 722 * but didn't find one with the name "pass". Either way, 723 * we return ENOENT, since we couldn't find something. 724 */ 725 if (periph == NULL) { 726 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 727 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 728 *ccb->cgdl.periph_name = '\0'; 729 ccb->cgdl.unit_number = 0; 730 error = ENOENT; 731 /* 732 * It is unfortunate that this is even necessary, 733 * but there are many, many clueless users out there. 734 * If this is true, the user is looking for the 735 * passthrough driver, but doesn't have one in his 736 * kernel. 737 */ 738 if (base_periph_found == 1) { 739 printf("xptioctl: pass driver is not in the " 740 "kernel\n"); 741 printf("xptioctl: put \"device pass\" in " 742 "your kernel config file\n"); 743 } 744 } 745 xpt_unlock_buses(); 746 break; 747 } 748 default: 749 error = ENOTTY; 750 break; 751 } 752 753 return(error); 754 } 755 756 static int 757 cam_module_event_handler(module_t mod, int what, void *arg) 758 { 759 int error; 760 761 switch (what) { 762 case MOD_LOAD: 763 if ((error = xpt_init(NULL)) != 0) 764 return (error); 765 break; 766 case MOD_UNLOAD: 767 return EBUSY; 768 default: 769 return EOPNOTSUPP; 770 } 771 772 return 0; 773 } 774 775 static struct xpt_proto * 776 xpt_proto_find(cam_proto proto) 777 { 778 struct xpt_proto **pp; 779 780 SET_FOREACH(pp, cam_xpt_proto_set) { 781 if ((*pp)->proto == proto) 782 return *pp; 783 } 784 785 return NULL; 786 } 787 788 static void 789 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 790 { 791 792 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 793 xpt_free_path(done_ccb->ccb_h.path); 794 xpt_free_ccb(done_ccb); 795 } else { 796 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 797 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 798 } 799 xpt_release_boot(); 800 } 801 802 /* thread to handle bus rescans */ 803 static void 804 xpt_scanner_thread(void *dummy) 805 { 806 union ccb *ccb; 807 struct cam_path path; 808 809 xpt_lock_buses(); 810 for (;;) { 811 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 812 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 813 "-", 0); 814 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 815 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 816 xpt_unlock_buses(); 817 818 /* 819 * Since lock can be dropped inside and path freed 820 * by completion callback even before return here, 821 * take our own path copy for reference. 822 */ 823 xpt_copy_path(&path, ccb->ccb_h.path); 824 xpt_path_lock(&path); 825 xpt_action(ccb); 826 xpt_path_unlock(&path); 827 xpt_release_path(&path); 828 829 xpt_lock_buses(); 830 } 831 } 832 } 833 834 void 835 xpt_rescan(union ccb *ccb) 836 { 837 struct ccb_hdr *hdr; 838 839 /* Prepare request */ 840 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 841 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 842 ccb->ccb_h.func_code = XPT_SCAN_BUS; 843 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 844 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 845 ccb->ccb_h.func_code = XPT_SCAN_TGT; 846 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 847 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 848 ccb->ccb_h.func_code = XPT_SCAN_LUN; 849 else { 850 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 851 xpt_free_path(ccb->ccb_h.path); 852 xpt_free_ccb(ccb); 853 return; 854 } 855 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 856 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code, 857 xpt_action_name(ccb->ccb_h.func_code))); 858 859 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 860 ccb->ccb_h.cbfcnp = xpt_rescan_done; 861 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 862 /* Don't make duplicate entries for the same paths. */ 863 xpt_lock_buses(); 864 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 865 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 866 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 867 wakeup(&xsoftc.ccb_scanq); 868 xpt_unlock_buses(); 869 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 870 xpt_free_path(ccb->ccb_h.path); 871 xpt_free_ccb(ccb); 872 return; 873 } 874 } 875 } 876 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 877 xpt_hold_boot_locked(); 878 wakeup(&xsoftc.ccb_scanq); 879 xpt_unlock_buses(); 880 } 881 882 /* Functions accessed by the peripheral drivers */ 883 static int 884 xpt_init(void *dummy) 885 { 886 struct cam_sim *xpt_sim; 887 struct cam_path *path; 888 struct cam_devq *devq; 889 cam_status status; 890 int error, i; 891 892 TAILQ_INIT(&xsoftc.xpt_busses); 893 TAILQ_INIT(&xsoftc.ccb_scanq); 894 STAILQ_INIT(&xsoftc.highpowerq); 895 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 896 897 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 898 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 899 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 900 901 #ifdef CAM_BOOT_DELAY 902 /* 903 * Override this value at compile time to assist our users 904 * who don't use loader to boot a kernel. 905 */ 906 xsoftc.boot_delay = CAM_BOOT_DELAY; 907 #endif 908 909 /* 910 * The xpt layer is, itself, the equivalent of a SIM. 911 * Allow 16 ccbs in the ccb pool for it. This should 912 * give decent parallelism when we probe buses and 913 * perform other XPT functions. 914 */ 915 devq = cam_simq_alloc(16); 916 xpt_sim = cam_sim_alloc(xptaction, 917 xptpoll, 918 "xpt", 919 /*softc*/NULL, 920 /*unit*/0, 921 /*mtx*/NULL, 922 /*max_dev_transactions*/0, 923 /*max_tagged_dev_transactions*/0, 924 devq); 925 if (xpt_sim == NULL) 926 return (ENOMEM); 927 928 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 929 printf("xpt_init: xpt_bus_register failed with status %#x," 930 " failing attach\n", status); 931 return (EINVAL); 932 } 933 934 /* 935 * Looking at the XPT from the SIM layer, the XPT is 936 * the equivalent of a peripheral driver. Allocate 937 * a peripheral driver entry for us. 938 */ 939 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 940 CAM_TARGET_WILDCARD, 941 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 942 printf("xpt_init: xpt_create_path failed with status %#x," 943 " failing attach\n", status); 944 return (EINVAL); 945 } 946 xpt_path_lock(path); 947 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 948 path, NULL, 0, xpt_sim); 949 xpt_path_unlock(path); 950 xpt_free_path(path); 951 952 if (cam_num_doneqs < 1) 953 cam_num_doneqs = 1 + mp_ncpus / 6; 954 else if (cam_num_doneqs > MAXCPU) 955 cam_num_doneqs = MAXCPU; 956 for (i = 0; i < cam_num_doneqs; i++) { 957 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 958 MTX_DEF); 959 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 960 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 961 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 962 if (error != 0) { 963 cam_num_doneqs = i; 964 break; 965 } 966 } 967 if (cam_num_doneqs < 1) { 968 printf("xpt_init: Cannot init completion queues " 969 "- failing attach\n"); 970 return (ENOMEM); 971 } 972 973 /* 974 * Register a callback for when interrupts are enabled. 975 */ 976 config_intrhook_oneshot(xpt_config, NULL); 977 978 return (0); 979 } 980 981 static cam_status 982 xptregister(struct cam_periph *periph, void *arg) 983 { 984 struct cam_sim *xpt_sim; 985 986 if (periph == NULL) { 987 printf("xptregister: periph was NULL!!\n"); 988 return(CAM_REQ_CMP_ERR); 989 } 990 991 xpt_sim = (struct cam_sim *)arg; 992 xpt_sim->softc = periph; 993 xpt_periph = periph; 994 periph->softc = NULL; 995 996 return(CAM_REQ_CMP); 997 } 998 999 int32_t 1000 xpt_add_periph(struct cam_periph *periph) 1001 { 1002 struct cam_ed *device; 1003 int32_t status; 1004 1005 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 1006 device = periph->path->device; 1007 status = CAM_REQ_CMP; 1008 if (device != NULL) { 1009 mtx_lock(&device->target->bus->eb_mtx); 1010 device->generation++; 1011 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 1012 mtx_unlock(&device->target->bus->eb_mtx); 1013 atomic_add_32(&xsoftc.xpt_generation, 1); 1014 } 1015 1016 return (status); 1017 } 1018 1019 void 1020 xpt_remove_periph(struct cam_periph *periph) 1021 { 1022 struct cam_ed *device; 1023 1024 device = periph->path->device; 1025 if (device != NULL) { 1026 mtx_lock(&device->target->bus->eb_mtx); 1027 device->generation++; 1028 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 1029 mtx_unlock(&device->target->bus->eb_mtx); 1030 atomic_add_32(&xsoftc.xpt_generation, 1); 1031 } 1032 } 1033 1034 1035 void 1036 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1037 { 1038 struct cam_path *path = periph->path; 1039 struct xpt_proto *proto; 1040 1041 cam_periph_assert(periph, MA_OWNED); 1042 periph->flags |= CAM_PERIPH_ANNOUNCED; 1043 1044 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1045 periph->periph_name, periph->unit_number, 1046 path->bus->sim->sim_name, 1047 path->bus->sim->unit_number, 1048 path->bus->sim->bus_id, 1049 path->bus->path_id, 1050 path->target->target_id, 1051 (uintmax_t)path->device->lun_id); 1052 printf("%s%d: ", periph->periph_name, periph->unit_number); 1053 proto = xpt_proto_find(path->device->protocol); 1054 if (proto) 1055 proto->ops->announce(path->device); 1056 else 1057 printf("%s%d: Unknown protocol device %d\n", 1058 periph->periph_name, periph->unit_number, 1059 path->device->protocol); 1060 if (path->device->serial_num_len > 0) { 1061 /* Don't wrap the screen - print only the first 60 chars */ 1062 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1063 periph->unit_number, path->device->serial_num); 1064 } 1065 /* Announce transport details. */ 1066 path->bus->xport->ops->announce(periph); 1067 /* Announce command queueing. */ 1068 if (path->device->inq_flags & SID_CmdQue 1069 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1070 printf("%s%d: Command Queueing enabled\n", 1071 periph->periph_name, periph->unit_number); 1072 } 1073 /* Announce caller's details if they've passed in. */ 1074 if (announce_string != NULL) 1075 printf("%s%d: %s\n", periph->periph_name, 1076 periph->unit_number, announce_string); 1077 } 1078 1079 void 1080 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb, 1081 char *announce_string) 1082 { 1083 struct cam_path *path = periph->path; 1084 struct xpt_proto *proto; 1085 1086 cam_periph_assert(periph, MA_OWNED); 1087 periph->flags |= CAM_PERIPH_ANNOUNCED; 1088 1089 /* Fall back to the non-sbuf method if necessary */ 1090 if (xsoftc.announce_nosbuf != 0) { 1091 xpt_announce_periph(periph, announce_string); 1092 return; 1093 } 1094 proto = xpt_proto_find(path->device->protocol); 1095 if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) || 1096 (path->bus->xport->ops->announce_sbuf == NULL)) { 1097 xpt_announce_periph(periph, announce_string); 1098 return; 1099 } 1100 1101 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1102 periph->periph_name, periph->unit_number, 1103 path->bus->sim->sim_name, 1104 path->bus->sim->unit_number, 1105 path->bus->sim->bus_id, 1106 path->bus->path_id, 1107 path->target->target_id, 1108 (uintmax_t)path->device->lun_id); 1109 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number); 1110 1111 if (proto) 1112 proto->ops->announce_sbuf(path->device, sb); 1113 else 1114 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n", 1115 periph->periph_name, periph->unit_number, 1116 path->device->protocol); 1117 if (path->device->serial_num_len > 0) { 1118 /* Don't wrap the screen - print only the first 60 chars */ 1119 sbuf_printf(sb, "%s%d: Serial Number %.60s\n", 1120 periph->periph_name, periph->unit_number, 1121 path->device->serial_num); 1122 } 1123 /* Announce transport details. */ 1124 path->bus->xport->ops->announce_sbuf(periph, sb); 1125 /* Announce command queueing. */ 1126 if (path->device->inq_flags & SID_CmdQue 1127 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1128 sbuf_printf(sb, "%s%d: Command Queueing enabled\n", 1129 periph->periph_name, periph->unit_number); 1130 } 1131 /* Announce caller's details if they've passed in. */ 1132 if (announce_string != NULL) 1133 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name, 1134 periph->unit_number, announce_string); 1135 } 1136 1137 void 1138 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1139 { 1140 if (quirks != 0) { 1141 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1142 periph->unit_number, quirks, bit_string); 1143 } 1144 } 1145 1146 void 1147 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb, 1148 int quirks, char *bit_string) 1149 { 1150 if (xsoftc.announce_nosbuf != 0) { 1151 xpt_announce_quirks(periph, quirks, bit_string); 1152 return; 1153 } 1154 1155 if (quirks != 0) { 1156 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name, 1157 periph->unit_number, quirks, bit_string); 1158 } 1159 } 1160 1161 void 1162 xpt_denounce_periph(struct cam_periph *periph) 1163 { 1164 struct cam_path *path = periph->path; 1165 struct xpt_proto *proto; 1166 1167 cam_periph_assert(periph, MA_OWNED); 1168 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1169 periph->periph_name, periph->unit_number, 1170 path->bus->sim->sim_name, 1171 path->bus->sim->unit_number, 1172 path->bus->sim->bus_id, 1173 path->bus->path_id, 1174 path->target->target_id, 1175 (uintmax_t)path->device->lun_id); 1176 printf("%s%d: ", periph->periph_name, periph->unit_number); 1177 proto = xpt_proto_find(path->device->protocol); 1178 if (proto) 1179 proto->ops->denounce(path->device); 1180 else 1181 printf("%s%d: Unknown protocol device %d\n", 1182 periph->periph_name, periph->unit_number, 1183 path->device->protocol); 1184 if (path->device->serial_num_len > 0) 1185 printf(" s/n %.60s", path->device->serial_num); 1186 printf(" detached\n"); 1187 } 1188 1189 void 1190 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb) 1191 { 1192 struct cam_path *path = periph->path; 1193 struct xpt_proto *proto; 1194 1195 cam_periph_assert(periph, MA_OWNED); 1196 1197 /* Fall back to the non-sbuf method if necessary */ 1198 if (xsoftc.announce_nosbuf != 0) { 1199 xpt_denounce_periph(periph); 1200 return; 1201 } 1202 proto = xpt_proto_find(path->device->protocol); 1203 if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) { 1204 xpt_denounce_periph(periph); 1205 return; 1206 } 1207 1208 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1209 periph->periph_name, periph->unit_number, 1210 path->bus->sim->sim_name, 1211 path->bus->sim->unit_number, 1212 path->bus->sim->bus_id, 1213 path->bus->path_id, 1214 path->target->target_id, 1215 (uintmax_t)path->device->lun_id); 1216 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number); 1217 1218 if (proto) 1219 proto->ops->denounce_sbuf(path->device, sb); 1220 else 1221 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n", 1222 periph->periph_name, periph->unit_number, 1223 path->device->protocol); 1224 if (path->device->serial_num_len > 0) 1225 sbuf_printf(sb, " s/n %.60s", path->device->serial_num); 1226 sbuf_printf(sb, " detached\n"); 1227 } 1228 1229 int 1230 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1231 { 1232 int ret = -1, l, o; 1233 struct ccb_dev_advinfo cdai; 1234 struct scsi_vpd_device_id *did; 1235 struct scsi_vpd_id_descriptor *idd; 1236 1237 xpt_path_assert(path, MA_OWNED); 1238 1239 memset(&cdai, 0, sizeof(cdai)); 1240 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1241 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1242 cdai.flags = CDAI_FLAG_NONE; 1243 cdai.bufsiz = len; 1244 cdai.buf = buf; 1245 1246 if (!strcmp(attr, "GEOM::ident")) 1247 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1248 else if (!strcmp(attr, "GEOM::physpath")) 1249 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1250 else if (strcmp(attr, "GEOM::lunid") == 0 || 1251 strcmp(attr, "GEOM::lunname") == 0) { 1252 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1253 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1254 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT); 1255 if (cdai.buf == NULL) { 1256 ret = ENOMEM; 1257 goto out; 1258 } 1259 } else 1260 goto out; 1261 1262 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1263 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1264 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1265 if (cdai.provsiz == 0) 1266 goto out; 1267 switch(cdai.buftype) { 1268 case CDAI_TYPE_SCSI_DEVID: 1269 did = (struct scsi_vpd_device_id *)cdai.buf; 1270 if (strcmp(attr, "GEOM::lunid") == 0) { 1271 idd = scsi_get_devid(did, cdai.provsiz, 1272 scsi_devid_is_lun_naa); 1273 if (idd == NULL) 1274 idd = scsi_get_devid(did, cdai.provsiz, 1275 scsi_devid_is_lun_eui64); 1276 if (idd == NULL) 1277 idd = scsi_get_devid(did, cdai.provsiz, 1278 scsi_devid_is_lun_uuid); 1279 if (idd == NULL) 1280 idd = scsi_get_devid(did, cdai.provsiz, 1281 scsi_devid_is_lun_md5); 1282 } else 1283 idd = NULL; 1284 1285 if (idd == NULL) 1286 idd = scsi_get_devid(did, cdai.provsiz, 1287 scsi_devid_is_lun_t10); 1288 if (idd == NULL) 1289 idd = scsi_get_devid(did, cdai.provsiz, 1290 scsi_devid_is_lun_name); 1291 if (idd == NULL) 1292 break; 1293 1294 ret = 0; 1295 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == 1296 SVPD_ID_CODESET_ASCII) { 1297 if (idd->length < len) { 1298 for (l = 0; l < idd->length; l++) 1299 buf[l] = idd->identifier[l] ? 1300 idd->identifier[l] : ' '; 1301 buf[l] = 0; 1302 } else 1303 ret = EFAULT; 1304 break; 1305 } 1306 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == 1307 SVPD_ID_CODESET_UTF8) { 1308 l = strnlen(idd->identifier, idd->length); 1309 if (l < len) { 1310 bcopy(idd->identifier, buf, l); 1311 buf[l] = 0; 1312 } else 1313 ret = EFAULT; 1314 break; 1315 } 1316 if ((idd->id_type & SVPD_ID_TYPE_MASK) == 1317 SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) { 1318 if ((idd->length - 2) * 2 + 4 >= len) { 1319 ret = EFAULT; 1320 break; 1321 } 1322 for (l = 2, o = 0; l < idd->length; l++) { 1323 if (l == 6 || l == 8 || l == 10 || l == 12) 1324 o += sprintf(buf + o, "-"); 1325 o += sprintf(buf + o, "%02x", 1326 idd->identifier[l]); 1327 } 1328 break; 1329 } 1330 if (idd->length * 2 < len) { 1331 for (l = 0; l < idd->length; l++) 1332 sprintf(buf + l * 2, "%02x", 1333 idd->identifier[l]); 1334 } else 1335 ret = EFAULT; 1336 break; 1337 default: 1338 if (cdai.provsiz < len) { 1339 cdai.buf[cdai.provsiz] = 0; 1340 ret = 0; 1341 } else 1342 ret = EFAULT; 1343 break; 1344 } 1345 1346 out: 1347 if ((char *)cdai.buf != buf) 1348 free(cdai.buf, M_CAMXPT); 1349 return ret; 1350 } 1351 1352 static dev_match_ret 1353 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1354 struct cam_eb *bus) 1355 { 1356 dev_match_ret retval; 1357 u_int i; 1358 1359 retval = DM_RET_NONE; 1360 1361 /* 1362 * If we aren't given something to match against, that's an error. 1363 */ 1364 if (bus == NULL) 1365 return(DM_RET_ERROR); 1366 1367 /* 1368 * If there are no match entries, then this bus matches no 1369 * matter what. 1370 */ 1371 if ((patterns == NULL) || (num_patterns == 0)) 1372 return(DM_RET_DESCEND | DM_RET_COPY); 1373 1374 for (i = 0; i < num_patterns; i++) { 1375 struct bus_match_pattern *cur_pattern; 1376 1377 /* 1378 * If the pattern in question isn't for a bus node, we 1379 * aren't interested. However, we do indicate to the 1380 * calling routine that we should continue descending the 1381 * tree, since the user wants to match against lower-level 1382 * EDT elements. 1383 */ 1384 if (patterns[i].type != DEV_MATCH_BUS) { 1385 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1386 retval |= DM_RET_DESCEND; 1387 continue; 1388 } 1389 1390 cur_pattern = &patterns[i].pattern.bus_pattern; 1391 1392 /* 1393 * If they want to match any bus node, we give them any 1394 * device node. 1395 */ 1396 if (cur_pattern->flags == BUS_MATCH_ANY) { 1397 /* set the copy flag */ 1398 retval |= DM_RET_COPY; 1399 1400 /* 1401 * If we've already decided on an action, go ahead 1402 * and return. 1403 */ 1404 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1405 return(retval); 1406 } 1407 1408 /* 1409 * Not sure why someone would do this... 1410 */ 1411 if (cur_pattern->flags == BUS_MATCH_NONE) 1412 continue; 1413 1414 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1415 && (cur_pattern->path_id != bus->path_id)) 1416 continue; 1417 1418 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1419 && (cur_pattern->bus_id != bus->sim->bus_id)) 1420 continue; 1421 1422 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1423 && (cur_pattern->unit_number != bus->sim->unit_number)) 1424 continue; 1425 1426 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1427 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1428 DEV_IDLEN) != 0)) 1429 continue; 1430 1431 /* 1432 * If we get to this point, the user definitely wants 1433 * information on this bus. So tell the caller to copy the 1434 * data out. 1435 */ 1436 retval |= DM_RET_COPY; 1437 1438 /* 1439 * If the return action has been set to descend, then we 1440 * know that we've already seen a non-bus matching 1441 * expression, therefore we need to further descend the tree. 1442 * This won't change by continuing around the loop, so we 1443 * go ahead and return. If we haven't seen a non-bus 1444 * matching expression, we keep going around the loop until 1445 * we exhaust the matching expressions. We'll set the stop 1446 * flag once we fall out of the loop. 1447 */ 1448 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1449 return(retval); 1450 } 1451 1452 /* 1453 * If the return action hasn't been set to descend yet, that means 1454 * we haven't seen anything other than bus matching patterns. So 1455 * tell the caller to stop descending the tree -- the user doesn't 1456 * want to match against lower level tree elements. 1457 */ 1458 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1459 retval |= DM_RET_STOP; 1460 1461 return(retval); 1462 } 1463 1464 static dev_match_ret 1465 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1466 struct cam_ed *device) 1467 { 1468 dev_match_ret retval; 1469 u_int i; 1470 1471 retval = DM_RET_NONE; 1472 1473 /* 1474 * If we aren't given something to match against, that's an error. 1475 */ 1476 if (device == NULL) 1477 return(DM_RET_ERROR); 1478 1479 /* 1480 * If there are no match entries, then this device matches no 1481 * matter what. 1482 */ 1483 if ((patterns == NULL) || (num_patterns == 0)) 1484 return(DM_RET_DESCEND | DM_RET_COPY); 1485 1486 for (i = 0; i < num_patterns; i++) { 1487 struct device_match_pattern *cur_pattern; 1488 struct scsi_vpd_device_id *device_id_page; 1489 1490 /* 1491 * If the pattern in question isn't for a device node, we 1492 * aren't interested. 1493 */ 1494 if (patterns[i].type != DEV_MATCH_DEVICE) { 1495 if ((patterns[i].type == DEV_MATCH_PERIPH) 1496 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1497 retval |= DM_RET_DESCEND; 1498 continue; 1499 } 1500 1501 cur_pattern = &patterns[i].pattern.device_pattern; 1502 1503 /* Error out if mutually exclusive options are specified. */ 1504 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1505 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1506 return(DM_RET_ERROR); 1507 1508 /* 1509 * If they want to match any device node, we give them any 1510 * device node. 1511 */ 1512 if (cur_pattern->flags == DEV_MATCH_ANY) 1513 goto copy_dev_node; 1514 1515 /* 1516 * Not sure why someone would do this... 1517 */ 1518 if (cur_pattern->flags == DEV_MATCH_NONE) 1519 continue; 1520 1521 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1522 && (cur_pattern->path_id != device->target->bus->path_id)) 1523 continue; 1524 1525 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1526 && (cur_pattern->target_id != device->target->target_id)) 1527 continue; 1528 1529 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1530 && (cur_pattern->target_lun != device->lun_id)) 1531 continue; 1532 1533 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1534 && (cam_quirkmatch((caddr_t)&device->inq_data, 1535 (caddr_t)&cur_pattern->data.inq_pat, 1536 1, sizeof(cur_pattern->data.inq_pat), 1537 scsi_static_inquiry_match) == NULL)) 1538 continue; 1539 1540 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1541 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1542 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1543 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1544 device->device_id_len 1545 - SVPD_DEVICE_ID_HDR_LEN, 1546 cur_pattern->data.devid_pat.id, 1547 cur_pattern->data.devid_pat.id_len) != 0)) 1548 continue; 1549 1550 copy_dev_node: 1551 /* 1552 * If we get to this point, the user definitely wants 1553 * information on this device. So tell the caller to copy 1554 * the data out. 1555 */ 1556 retval |= DM_RET_COPY; 1557 1558 /* 1559 * If the return action has been set to descend, then we 1560 * know that we've already seen a peripheral matching 1561 * expression, therefore we need to further descend the tree. 1562 * This won't change by continuing around the loop, so we 1563 * go ahead and return. If we haven't seen a peripheral 1564 * matching expression, we keep going around the loop until 1565 * we exhaust the matching expressions. We'll set the stop 1566 * flag once we fall out of the loop. 1567 */ 1568 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1569 return(retval); 1570 } 1571 1572 /* 1573 * If the return action hasn't been set to descend yet, that means 1574 * we haven't seen any peripheral matching patterns. So tell the 1575 * caller to stop descending the tree -- the user doesn't want to 1576 * match against lower level tree elements. 1577 */ 1578 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1579 retval |= DM_RET_STOP; 1580 1581 return(retval); 1582 } 1583 1584 /* 1585 * Match a single peripheral against any number of match patterns. 1586 */ 1587 static dev_match_ret 1588 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1589 struct cam_periph *periph) 1590 { 1591 dev_match_ret retval; 1592 u_int i; 1593 1594 /* 1595 * If we aren't given something to match against, that's an error. 1596 */ 1597 if (periph == NULL) 1598 return(DM_RET_ERROR); 1599 1600 /* 1601 * If there are no match entries, then this peripheral matches no 1602 * matter what. 1603 */ 1604 if ((patterns == NULL) || (num_patterns == 0)) 1605 return(DM_RET_STOP | DM_RET_COPY); 1606 1607 /* 1608 * There aren't any nodes below a peripheral node, so there's no 1609 * reason to descend the tree any further. 1610 */ 1611 retval = DM_RET_STOP; 1612 1613 for (i = 0; i < num_patterns; i++) { 1614 struct periph_match_pattern *cur_pattern; 1615 1616 /* 1617 * If the pattern in question isn't for a peripheral, we 1618 * aren't interested. 1619 */ 1620 if (patterns[i].type != DEV_MATCH_PERIPH) 1621 continue; 1622 1623 cur_pattern = &patterns[i].pattern.periph_pattern; 1624 1625 /* 1626 * If they want to match on anything, then we will do so. 1627 */ 1628 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1629 /* set the copy flag */ 1630 retval |= DM_RET_COPY; 1631 1632 /* 1633 * We've already set the return action to stop, 1634 * since there are no nodes below peripherals in 1635 * the tree. 1636 */ 1637 return(retval); 1638 } 1639 1640 /* 1641 * Not sure why someone would do this... 1642 */ 1643 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1644 continue; 1645 1646 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1647 && (cur_pattern->path_id != periph->path->bus->path_id)) 1648 continue; 1649 1650 /* 1651 * For the target and lun id's, we have to make sure the 1652 * target and lun pointers aren't NULL. The xpt peripheral 1653 * has a wildcard target and device. 1654 */ 1655 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1656 && ((periph->path->target == NULL) 1657 ||(cur_pattern->target_id != periph->path->target->target_id))) 1658 continue; 1659 1660 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1661 && ((periph->path->device == NULL) 1662 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1663 continue; 1664 1665 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1666 && (cur_pattern->unit_number != periph->unit_number)) 1667 continue; 1668 1669 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1670 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1671 DEV_IDLEN) != 0)) 1672 continue; 1673 1674 /* 1675 * If we get to this point, the user definitely wants 1676 * information on this peripheral. So tell the caller to 1677 * copy the data out. 1678 */ 1679 retval |= DM_RET_COPY; 1680 1681 /* 1682 * The return action has already been set to stop, since 1683 * peripherals don't have any nodes below them in the EDT. 1684 */ 1685 return(retval); 1686 } 1687 1688 /* 1689 * If we get to this point, the peripheral that was passed in 1690 * doesn't match any of the patterns. 1691 */ 1692 return(retval); 1693 } 1694 1695 static int 1696 xptedtbusfunc(struct cam_eb *bus, void *arg) 1697 { 1698 struct ccb_dev_match *cdm; 1699 struct cam_et *target; 1700 dev_match_ret retval; 1701 1702 cdm = (struct ccb_dev_match *)arg; 1703 1704 /* 1705 * If our position is for something deeper in the tree, that means 1706 * that we've already seen this node. So, we keep going down. 1707 */ 1708 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1709 && (cdm->pos.cookie.bus == bus) 1710 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1711 && (cdm->pos.cookie.target != NULL)) 1712 retval = DM_RET_DESCEND; 1713 else 1714 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1715 1716 /* 1717 * If we got an error, bail out of the search. 1718 */ 1719 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1720 cdm->status = CAM_DEV_MATCH_ERROR; 1721 return(0); 1722 } 1723 1724 /* 1725 * If the copy flag is set, copy this bus out. 1726 */ 1727 if (retval & DM_RET_COPY) { 1728 int spaceleft, j; 1729 1730 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1731 sizeof(struct dev_match_result)); 1732 1733 /* 1734 * If we don't have enough space to put in another 1735 * match result, save our position and tell the 1736 * user there are more devices to check. 1737 */ 1738 if (spaceleft < sizeof(struct dev_match_result)) { 1739 bzero(&cdm->pos, sizeof(cdm->pos)); 1740 cdm->pos.position_type = 1741 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1742 1743 cdm->pos.cookie.bus = bus; 1744 cdm->pos.generations[CAM_BUS_GENERATION]= 1745 xsoftc.bus_generation; 1746 cdm->status = CAM_DEV_MATCH_MORE; 1747 return(0); 1748 } 1749 j = cdm->num_matches; 1750 cdm->num_matches++; 1751 cdm->matches[j].type = DEV_MATCH_BUS; 1752 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1753 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1754 cdm->matches[j].result.bus_result.unit_number = 1755 bus->sim->unit_number; 1756 strlcpy(cdm->matches[j].result.bus_result.dev_name, 1757 bus->sim->sim_name, 1758 sizeof(cdm->matches[j].result.bus_result.dev_name)); 1759 } 1760 1761 /* 1762 * If the user is only interested in buses, there's no 1763 * reason to descend to the next level in the tree. 1764 */ 1765 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1766 return(1); 1767 1768 /* 1769 * If there is a target generation recorded, check it to 1770 * make sure the target list hasn't changed. 1771 */ 1772 mtx_lock(&bus->eb_mtx); 1773 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1774 && (cdm->pos.cookie.bus == bus) 1775 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1776 && (cdm->pos.cookie.target != NULL)) { 1777 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1778 bus->generation)) { 1779 mtx_unlock(&bus->eb_mtx); 1780 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1781 return (0); 1782 } 1783 target = (struct cam_et *)cdm->pos.cookie.target; 1784 target->refcount++; 1785 } else 1786 target = NULL; 1787 mtx_unlock(&bus->eb_mtx); 1788 1789 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1790 } 1791 1792 static int 1793 xptedttargetfunc(struct cam_et *target, void *arg) 1794 { 1795 struct ccb_dev_match *cdm; 1796 struct cam_eb *bus; 1797 struct cam_ed *device; 1798 1799 cdm = (struct ccb_dev_match *)arg; 1800 bus = target->bus; 1801 1802 /* 1803 * If there is a device list generation recorded, check it to 1804 * make sure the device list hasn't changed. 1805 */ 1806 mtx_lock(&bus->eb_mtx); 1807 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1808 && (cdm->pos.cookie.bus == bus) 1809 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1810 && (cdm->pos.cookie.target == target) 1811 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1812 && (cdm->pos.cookie.device != NULL)) { 1813 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1814 target->generation) { 1815 mtx_unlock(&bus->eb_mtx); 1816 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1817 return(0); 1818 } 1819 device = (struct cam_ed *)cdm->pos.cookie.device; 1820 device->refcount++; 1821 } else 1822 device = NULL; 1823 mtx_unlock(&bus->eb_mtx); 1824 1825 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1826 } 1827 1828 static int 1829 xptedtdevicefunc(struct cam_ed *device, void *arg) 1830 { 1831 struct cam_eb *bus; 1832 struct cam_periph *periph; 1833 struct ccb_dev_match *cdm; 1834 dev_match_ret retval; 1835 1836 cdm = (struct ccb_dev_match *)arg; 1837 bus = device->target->bus; 1838 1839 /* 1840 * If our position is for something deeper in the tree, that means 1841 * that we've already seen this node. So, we keep going down. 1842 */ 1843 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1844 && (cdm->pos.cookie.device == device) 1845 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1846 && (cdm->pos.cookie.periph != NULL)) 1847 retval = DM_RET_DESCEND; 1848 else 1849 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1850 device); 1851 1852 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1853 cdm->status = CAM_DEV_MATCH_ERROR; 1854 return(0); 1855 } 1856 1857 /* 1858 * If the copy flag is set, copy this device out. 1859 */ 1860 if (retval & DM_RET_COPY) { 1861 int spaceleft, j; 1862 1863 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1864 sizeof(struct dev_match_result)); 1865 1866 /* 1867 * If we don't have enough space to put in another 1868 * match result, save our position and tell the 1869 * user there are more devices to check. 1870 */ 1871 if (spaceleft < sizeof(struct dev_match_result)) { 1872 bzero(&cdm->pos, sizeof(cdm->pos)); 1873 cdm->pos.position_type = 1874 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1875 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1876 1877 cdm->pos.cookie.bus = device->target->bus; 1878 cdm->pos.generations[CAM_BUS_GENERATION]= 1879 xsoftc.bus_generation; 1880 cdm->pos.cookie.target = device->target; 1881 cdm->pos.generations[CAM_TARGET_GENERATION] = 1882 device->target->bus->generation; 1883 cdm->pos.cookie.device = device; 1884 cdm->pos.generations[CAM_DEV_GENERATION] = 1885 device->target->generation; 1886 cdm->status = CAM_DEV_MATCH_MORE; 1887 return(0); 1888 } 1889 j = cdm->num_matches; 1890 cdm->num_matches++; 1891 cdm->matches[j].type = DEV_MATCH_DEVICE; 1892 cdm->matches[j].result.device_result.path_id = 1893 device->target->bus->path_id; 1894 cdm->matches[j].result.device_result.target_id = 1895 device->target->target_id; 1896 cdm->matches[j].result.device_result.target_lun = 1897 device->lun_id; 1898 cdm->matches[j].result.device_result.protocol = 1899 device->protocol; 1900 bcopy(&device->inq_data, 1901 &cdm->matches[j].result.device_result.inq_data, 1902 sizeof(struct scsi_inquiry_data)); 1903 bcopy(&device->ident_data, 1904 &cdm->matches[j].result.device_result.ident_data, 1905 sizeof(struct ata_params)); 1906 1907 /* Let the user know whether this device is unconfigured */ 1908 if (device->flags & CAM_DEV_UNCONFIGURED) 1909 cdm->matches[j].result.device_result.flags = 1910 DEV_RESULT_UNCONFIGURED; 1911 else 1912 cdm->matches[j].result.device_result.flags = 1913 DEV_RESULT_NOFLAG; 1914 } 1915 1916 /* 1917 * If the user isn't interested in peripherals, don't descend 1918 * the tree any further. 1919 */ 1920 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1921 return(1); 1922 1923 /* 1924 * If there is a peripheral list generation recorded, make sure 1925 * it hasn't changed. 1926 */ 1927 xpt_lock_buses(); 1928 mtx_lock(&bus->eb_mtx); 1929 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1930 && (cdm->pos.cookie.bus == bus) 1931 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1932 && (cdm->pos.cookie.target == device->target) 1933 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1934 && (cdm->pos.cookie.device == device) 1935 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1936 && (cdm->pos.cookie.periph != NULL)) { 1937 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1938 device->generation) { 1939 mtx_unlock(&bus->eb_mtx); 1940 xpt_unlock_buses(); 1941 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1942 return(0); 1943 } 1944 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1945 periph->refcount++; 1946 } else 1947 periph = NULL; 1948 mtx_unlock(&bus->eb_mtx); 1949 xpt_unlock_buses(); 1950 1951 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1952 } 1953 1954 static int 1955 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1956 { 1957 struct ccb_dev_match *cdm; 1958 dev_match_ret retval; 1959 1960 cdm = (struct ccb_dev_match *)arg; 1961 1962 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1963 1964 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1965 cdm->status = CAM_DEV_MATCH_ERROR; 1966 return(0); 1967 } 1968 1969 /* 1970 * If the copy flag is set, copy this peripheral out. 1971 */ 1972 if (retval & DM_RET_COPY) { 1973 int spaceleft, j; 1974 size_t l; 1975 1976 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1977 sizeof(struct dev_match_result)); 1978 1979 /* 1980 * If we don't have enough space to put in another 1981 * match result, save our position and tell the 1982 * user there are more devices to check. 1983 */ 1984 if (spaceleft < sizeof(struct dev_match_result)) { 1985 bzero(&cdm->pos, sizeof(cdm->pos)); 1986 cdm->pos.position_type = 1987 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1988 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1989 CAM_DEV_POS_PERIPH; 1990 1991 cdm->pos.cookie.bus = periph->path->bus; 1992 cdm->pos.generations[CAM_BUS_GENERATION]= 1993 xsoftc.bus_generation; 1994 cdm->pos.cookie.target = periph->path->target; 1995 cdm->pos.generations[CAM_TARGET_GENERATION] = 1996 periph->path->bus->generation; 1997 cdm->pos.cookie.device = periph->path->device; 1998 cdm->pos.generations[CAM_DEV_GENERATION] = 1999 periph->path->target->generation; 2000 cdm->pos.cookie.periph = periph; 2001 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2002 periph->path->device->generation; 2003 cdm->status = CAM_DEV_MATCH_MORE; 2004 return(0); 2005 } 2006 2007 j = cdm->num_matches; 2008 cdm->num_matches++; 2009 cdm->matches[j].type = DEV_MATCH_PERIPH; 2010 cdm->matches[j].result.periph_result.path_id = 2011 periph->path->bus->path_id; 2012 cdm->matches[j].result.periph_result.target_id = 2013 periph->path->target->target_id; 2014 cdm->matches[j].result.periph_result.target_lun = 2015 periph->path->device->lun_id; 2016 cdm->matches[j].result.periph_result.unit_number = 2017 periph->unit_number; 2018 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2019 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2020 periph->periph_name, l); 2021 } 2022 2023 return(1); 2024 } 2025 2026 static int 2027 xptedtmatch(struct ccb_dev_match *cdm) 2028 { 2029 struct cam_eb *bus; 2030 int ret; 2031 2032 cdm->num_matches = 0; 2033 2034 /* 2035 * Check the bus list generation. If it has changed, the user 2036 * needs to reset everything and start over. 2037 */ 2038 xpt_lock_buses(); 2039 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2040 && (cdm->pos.cookie.bus != NULL)) { 2041 if (cdm->pos.generations[CAM_BUS_GENERATION] != 2042 xsoftc.bus_generation) { 2043 xpt_unlock_buses(); 2044 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2045 return(0); 2046 } 2047 bus = (struct cam_eb *)cdm->pos.cookie.bus; 2048 bus->refcount++; 2049 } else 2050 bus = NULL; 2051 xpt_unlock_buses(); 2052 2053 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 2054 2055 /* 2056 * If we get back 0, that means that we had to stop before fully 2057 * traversing the EDT. It also means that one of the subroutines 2058 * has set the status field to the proper value. If we get back 1, 2059 * we've fully traversed the EDT and copied out any matching entries. 2060 */ 2061 if (ret == 1) 2062 cdm->status = CAM_DEV_MATCH_LAST; 2063 2064 return(ret); 2065 } 2066 2067 static int 2068 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2069 { 2070 struct cam_periph *periph; 2071 struct ccb_dev_match *cdm; 2072 2073 cdm = (struct ccb_dev_match *)arg; 2074 2075 xpt_lock_buses(); 2076 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2077 && (cdm->pos.cookie.pdrv == pdrv) 2078 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2079 && (cdm->pos.cookie.periph != NULL)) { 2080 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2081 (*pdrv)->generation) { 2082 xpt_unlock_buses(); 2083 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2084 return(0); 2085 } 2086 periph = (struct cam_periph *)cdm->pos.cookie.periph; 2087 periph->refcount++; 2088 } else 2089 periph = NULL; 2090 xpt_unlock_buses(); 2091 2092 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 2093 } 2094 2095 static int 2096 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2097 { 2098 struct ccb_dev_match *cdm; 2099 dev_match_ret retval; 2100 2101 cdm = (struct ccb_dev_match *)arg; 2102 2103 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2104 2105 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2106 cdm->status = CAM_DEV_MATCH_ERROR; 2107 return(0); 2108 } 2109 2110 /* 2111 * If the copy flag is set, copy this peripheral out. 2112 */ 2113 if (retval & DM_RET_COPY) { 2114 int spaceleft, j; 2115 size_t l; 2116 2117 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2118 sizeof(struct dev_match_result)); 2119 2120 /* 2121 * If we don't have enough space to put in another 2122 * match result, save our position and tell the 2123 * user there are more devices to check. 2124 */ 2125 if (spaceleft < sizeof(struct dev_match_result)) { 2126 struct periph_driver **pdrv; 2127 2128 pdrv = NULL; 2129 bzero(&cdm->pos, sizeof(cdm->pos)); 2130 cdm->pos.position_type = 2131 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2132 CAM_DEV_POS_PERIPH; 2133 2134 /* 2135 * This may look a bit non-sensical, but it is 2136 * actually quite logical. There are very few 2137 * peripheral drivers, and bloating every peripheral 2138 * structure with a pointer back to its parent 2139 * peripheral driver linker set entry would cost 2140 * more in the long run than doing this quick lookup. 2141 */ 2142 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2143 if (strcmp((*pdrv)->driver_name, 2144 periph->periph_name) == 0) 2145 break; 2146 } 2147 2148 if (*pdrv == NULL) { 2149 cdm->status = CAM_DEV_MATCH_ERROR; 2150 return(0); 2151 } 2152 2153 cdm->pos.cookie.pdrv = pdrv; 2154 /* 2155 * The periph generation slot does double duty, as 2156 * does the periph pointer slot. They are used for 2157 * both edt and pdrv lookups and positioning. 2158 */ 2159 cdm->pos.cookie.periph = periph; 2160 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2161 (*pdrv)->generation; 2162 cdm->status = CAM_DEV_MATCH_MORE; 2163 return(0); 2164 } 2165 2166 j = cdm->num_matches; 2167 cdm->num_matches++; 2168 cdm->matches[j].type = DEV_MATCH_PERIPH; 2169 cdm->matches[j].result.periph_result.path_id = 2170 periph->path->bus->path_id; 2171 2172 /* 2173 * The transport layer peripheral doesn't have a target or 2174 * lun. 2175 */ 2176 if (periph->path->target) 2177 cdm->matches[j].result.periph_result.target_id = 2178 periph->path->target->target_id; 2179 else 2180 cdm->matches[j].result.periph_result.target_id = 2181 CAM_TARGET_WILDCARD; 2182 2183 if (periph->path->device) 2184 cdm->matches[j].result.periph_result.target_lun = 2185 periph->path->device->lun_id; 2186 else 2187 cdm->matches[j].result.periph_result.target_lun = 2188 CAM_LUN_WILDCARD; 2189 2190 cdm->matches[j].result.periph_result.unit_number = 2191 periph->unit_number; 2192 l = sizeof(cdm->matches[j].result.periph_result.periph_name); 2193 strlcpy(cdm->matches[j].result.periph_result.periph_name, 2194 periph->periph_name, l); 2195 } 2196 2197 return(1); 2198 } 2199 2200 static int 2201 xptperiphlistmatch(struct ccb_dev_match *cdm) 2202 { 2203 int ret; 2204 2205 cdm->num_matches = 0; 2206 2207 /* 2208 * At this point in the edt traversal function, we check the bus 2209 * list generation to make sure that no buses have been added or 2210 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2211 * For the peripheral driver list traversal function, however, we 2212 * don't have to worry about new peripheral driver types coming or 2213 * going; they're in a linker set, and therefore can't change 2214 * without a recompile. 2215 */ 2216 2217 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2218 && (cdm->pos.cookie.pdrv != NULL)) 2219 ret = xptpdrvtraverse( 2220 (struct periph_driver **)cdm->pos.cookie.pdrv, 2221 xptplistpdrvfunc, cdm); 2222 else 2223 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2224 2225 /* 2226 * If we get back 0, that means that we had to stop before fully 2227 * traversing the peripheral driver tree. It also means that one of 2228 * the subroutines has set the status field to the proper value. If 2229 * we get back 1, we've fully traversed the EDT and copied out any 2230 * matching entries. 2231 */ 2232 if (ret == 1) 2233 cdm->status = CAM_DEV_MATCH_LAST; 2234 2235 return(ret); 2236 } 2237 2238 static int 2239 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2240 { 2241 struct cam_eb *bus, *next_bus; 2242 int retval; 2243 2244 retval = 1; 2245 if (start_bus) 2246 bus = start_bus; 2247 else { 2248 xpt_lock_buses(); 2249 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2250 if (bus == NULL) { 2251 xpt_unlock_buses(); 2252 return (retval); 2253 } 2254 bus->refcount++; 2255 xpt_unlock_buses(); 2256 } 2257 for (; bus != NULL; bus = next_bus) { 2258 retval = tr_func(bus, arg); 2259 if (retval == 0) { 2260 xpt_release_bus(bus); 2261 break; 2262 } 2263 xpt_lock_buses(); 2264 next_bus = TAILQ_NEXT(bus, links); 2265 if (next_bus) 2266 next_bus->refcount++; 2267 xpt_unlock_buses(); 2268 xpt_release_bus(bus); 2269 } 2270 return(retval); 2271 } 2272 2273 static int 2274 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2275 xpt_targetfunc_t *tr_func, void *arg) 2276 { 2277 struct cam_et *target, *next_target; 2278 int retval; 2279 2280 retval = 1; 2281 if (start_target) 2282 target = start_target; 2283 else { 2284 mtx_lock(&bus->eb_mtx); 2285 target = TAILQ_FIRST(&bus->et_entries); 2286 if (target == NULL) { 2287 mtx_unlock(&bus->eb_mtx); 2288 return (retval); 2289 } 2290 target->refcount++; 2291 mtx_unlock(&bus->eb_mtx); 2292 } 2293 for (; target != NULL; target = next_target) { 2294 retval = tr_func(target, arg); 2295 if (retval == 0) { 2296 xpt_release_target(target); 2297 break; 2298 } 2299 mtx_lock(&bus->eb_mtx); 2300 next_target = TAILQ_NEXT(target, links); 2301 if (next_target) 2302 next_target->refcount++; 2303 mtx_unlock(&bus->eb_mtx); 2304 xpt_release_target(target); 2305 } 2306 return(retval); 2307 } 2308 2309 static int 2310 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2311 xpt_devicefunc_t *tr_func, void *arg) 2312 { 2313 struct cam_eb *bus; 2314 struct cam_ed *device, *next_device; 2315 int retval; 2316 2317 retval = 1; 2318 bus = target->bus; 2319 if (start_device) 2320 device = start_device; 2321 else { 2322 mtx_lock(&bus->eb_mtx); 2323 device = TAILQ_FIRST(&target->ed_entries); 2324 if (device == NULL) { 2325 mtx_unlock(&bus->eb_mtx); 2326 return (retval); 2327 } 2328 device->refcount++; 2329 mtx_unlock(&bus->eb_mtx); 2330 } 2331 for (; device != NULL; device = next_device) { 2332 mtx_lock(&device->device_mtx); 2333 retval = tr_func(device, arg); 2334 mtx_unlock(&device->device_mtx); 2335 if (retval == 0) { 2336 xpt_release_device(device); 2337 break; 2338 } 2339 mtx_lock(&bus->eb_mtx); 2340 next_device = TAILQ_NEXT(device, links); 2341 if (next_device) 2342 next_device->refcount++; 2343 mtx_unlock(&bus->eb_mtx); 2344 xpt_release_device(device); 2345 } 2346 return(retval); 2347 } 2348 2349 static int 2350 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2351 xpt_periphfunc_t *tr_func, void *arg) 2352 { 2353 struct cam_eb *bus; 2354 struct cam_periph *periph, *next_periph; 2355 int retval; 2356 2357 retval = 1; 2358 2359 bus = device->target->bus; 2360 if (start_periph) 2361 periph = start_periph; 2362 else { 2363 xpt_lock_buses(); 2364 mtx_lock(&bus->eb_mtx); 2365 periph = SLIST_FIRST(&device->periphs); 2366 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2367 periph = SLIST_NEXT(periph, periph_links); 2368 if (periph == NULL) { 2369 mtx_unlock(&bus->eb_mtx); 2370 xpt_unlock_buses(); 2371 return (retval); 2372 } 2373 periph->refcount++; 2374 mtx_unlock(&bus->eb_mtx); 2375 xpt_unlock_buses(); 2376 } 2377 for (; periph != NULL; periph = next_periph) { 2378 retval = tr_func(periph, arg); 2379 if (retval == 0) { 2380 cam_periph_release_locked(periph); 2381 break; 2382 } 2383 xpt_lock_buses(); 2384 mtx_lock(&bus->eb_mtx); 2385 next_periph = SLIST_NEXT(periph, periph_links); 2386 while (next_periph != NULL && 2387 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2388 next_periph = SLIST_NEXT(next_periph, periph_links); 2389 if (next_periph) 2390 next_periph->refcount++; 2391 mtx_unlock(&bus->eb_mtx); 2392 xpt_unlock_buses(); 2393 cam_periph_release_locked(periph); 2394 } 2395 return(retval); 2396 } 2397 2398 static int 2399 xptpdrvtraverse(struct periph_driver **start_pdrv, 2400 xpt_pdrvfunc_t *tr_func, void *arg) 2401 { 2402 struct periph_driver **pdrv; 2403 int retval; 2404 2405 retval = 1; 2406 2407 /* 2408 * We don't traverse the peripheral driver list like we do the 2409 * other lists, because it is a linker set, and therefore cannot be 2410 * changed during runtime. If the peripheral driver list is ever 2411 * re-done to be something other than a linker set (i.e. it can 2412 * change while the system is running), the list traversal should 2413 * be modified to work like the other traversal functions. 2414 */ 2415 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2416 *pdrv != NULL; pdrv++) { 2417 retval = tr_func(pdrv, arg); 2418 2419 if (retval == 0) 2420 return(retval); 2421 } 2422 2423 return(retval); 2424 } 2425 2426 static int 2427 xptpdperiphtraverse(struct periph_driver **pdrv, 2428 struct cam_periph *start_periph, 2429 xpt_periphfunc_t *tr_func, void *arg) 2430 { 2431 struct cam_periph *periph, *next_periph; 2432 int retval; 2433 2434 retval = 1; 2435 2436 if (start_periph) 2437 periph = start_periph; 2438 else { 2439 xpt_lock_buses(); 2440 periph = TAILQ_FIRST(&(*pdrv)->units); 2441 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2442 periph = TAILQ_NEXT(periph, unit_links); 2443 if (periph == NULL) { 2444 xpt_unlock_buses(); 2445 return (retval); 2446 } 2447 periph->refcount++; 2448 xpt_unlock_buses(); 2449 } 2450 for (; periph != NULL; periph = next_periph) { 2451 cam_periph_lock(periph); 2452 retval = tr_func(periph, arg); 2453 cam_periph_unlock(periph); 2454 if (retval == 0) { 2455 cam_periph_release(periph); 2456 break; 2457 } 2458 xpt_lock_buses(); 2459 next_periph = TAILQ_NEXT(periph, unit_links); 2460 while (next_periph != NULL && 2461 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2462 next_periph = TAILQ_NEXT(next_periph, unit_links); 2463 if (next_periph) 2464 next_periph->refcount++; 2465 xpt_unlock_buses(); 2466 cam_periph_release(periph); 2467 } 2468 return(retval); 2469 } 2470 2471 static int 2472 xptdefbusfunc(struct cam_eb *bus, void *arg) 2473 { 2474 struct xpt_traverse_config *tr_config; 2475 2476 tr_config = (struct xpt_traverse_config *)arg; 2477 2478 if (tr_config->depth == XPT_DEPTH_BUS) { 2479 xpt_busfunc_t *tr_func; 2480 2481 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2482 2483 return(tr_func(bus, tr_config->tr_arg)); 2484 } else 2485 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2486 } 2487 2488 static int 2489 xptdeftargetfunc(struct cam_et *target, void *arg) 2490 { 2491 struct xpt_traverse_config *tr_config; 2492 2493 tr_config = (struct xpt_traverse_config *)arg; 2494 2495 if (tr_config->depth == XPT_DEPTH_TARGET) { 2496 xpt_targetfunc_t *tr_func; 2497 2498 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2499 2500 return(tr_func(target, tr_config->tr_arg)); 2501 } else 2502 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2503 } 2504 2505 static int 2506 xptdefdevicefunc(struct cam_ed *device, void *arg) 2507 { 2508 struct xpt_traverse_config *tr_config; 2509 2510 tr_config = (struct xpt_traverse_config *)arg; 2511 2512 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2513 xpt_devicefunc_t *tr_func; 2514 2515 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2516 2517 return(tr_func(device, tr_config->tr_arg)); 2518 } else 2519 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2520 } 2521 2522 static int 2523 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2524 { 2525 struct xpt_traverse_config *tr_config; 2526 xpt_periphfunc_t *tr_func; 2527 2528 tr_config = (struct xpt_traverse_config *)arg; 2529 2530 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2531 2532 /* 2533 * Unlike the other default functions, we don't check for depth 2534 * here. The peripheral driver level is the last level in the EDT, 2535 * so if we're here, we should execute the function in question. 2536 */ 2537 return(tr_func(periph, tr_config->tr_arg)); 2538 } 2539 2540 /* 2541 * Execute the given function for every bus in the EDT. 2542 */ 2543 static int 2544 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2545 { 2546 struct xpt_traverse_config tr_config; 2547 2548 tr_config.depth = XPT_DEPTH_BUS; 2549 tr_config.tr_func = tr_func; 2550 tr_config.tr_arg = arg; 2551 2552 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2553 } 2554 2555 /* 2556 * Execute the given function for every device in the EDT. 2557 */ 2558 static int 2559 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2560 { 2561 struct xpt_traverse_config tr_config; 2562 2563 tr_config.depth = XPT_DEPTH_DEVICE; 2564 tr_config.tr_func = tr_func; 2565 tr_config.tr_arg = arg; 2566 2567 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2568 } 2569 2570 static int 2571 xptsetasyncfunc(struct cam_ed *device, void *arg) 2572 { 2573 struct cam_path path; 2574 struct ccb_getdev cgd; 2575 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2576 2577 /* 2578 * Don't report unconfigured devices (Wildcard devs, 2579 * devices only for target mode, device instances 2580 * that have been invalidated but are waiting for 2581 * their last reference count to be released). 2582 */ 2583 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2584 return (1); 2585 2586 xpt_compile_path(&path, 2587 NULL, 2588 device->target->bus->path_id, 2589 device->target->target_id, 2590 device->lun_id); 2591 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2592 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2593 xpt_action((union ccb *)&cgd); 2594 csa->callback(csa->callback_arg, 2595 AC_FOUND_DEVICE, 2596 &path, &cgd); 2597 xpt_release_path(&path); 2598 2599 return(1); 2600 } 2601 2602 static int 2603 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2604 { 2605 struct cam_path path; 2606 struct ccb_pathinq cpi; 2607 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2608 2609 xpt_compile_path(&path, /*periph*/NULL, 2610 bus->path_id, 2611 CAM_TARGET_WILDCARD, 2612 CAM_LUN_WILDCARD); 2613 xpt_path_lock(&path); 2614 xpt_path_inq(&cpi, &path); 2615 csa->callback(csa->callback_arg, 2616 AC_PATH_REGISTERED, 2617 &path, &cpi); 2618 xpt_path_unlock(&path); 2619 xpt_release_path(&path); 2620 2621 return(1); 2622 } 2623 2624 void 2625 xpt_action(union ccb *start_ccb) 2626 { 2627 2628 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, 2629 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code, 2630 xpt_action_name(start_ccb->ccb_h.func_code))); 2631 2632 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2633 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb); 2634 } 2635 2636 void 2637 xpt_action_default(union ccb *start_ccb) 2638 { 2639 struct cam_path *path; 2640 struct cam_sim *sim; 2641 struct mtx *mtx; 2642 2643 path = start_ccb->ccb_h.path; 2644 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2645 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code, 2646 xpt_action_name(start_ccb->ccb_h.func_code))); 2647 2648 switch (start_ccb->ccb_h.func_code) { 2649 case XPT_SCSI_IO: 2650 { 2651 struct cam_ed *device; 2652 2653 /* 2654 * For the sake of compatibility with SCSI-1 2655 * devices that may not understand the identify 2656 * message, we include lun information in the 2657 * second byte of all commands. SCSI-1 specifies 2658 * that luns are a 3 bit value and reserves only 3 2659 * bits for lun information in the CDB. Later 2660 * revisions of the SCSI spec allow for more than 8 2661 * luns, but have deprecated lun information in the 2662 * CDB. So, if the lun won't fit, we must omit. 2663 * 2664 * Also be aware that during initial probing for devices, 2665 * the inquiry information is unknown but initialized to 0. 2666 * This means that this code will be exercised while probing 2667 * devices with an ANSI revision greater than 2. 2668 */ 2669 device = path->device; 2670 if (device->protocol_version <= SCSI_REV_2 2671 && start_ccb->ccb_h.target_lun < 8 2672 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2673 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 /* FALLTHROUGH */ 2691 case XPT_NVME_ADMIN: 2692 /* FALLTHROUGH */ 2693 case XPT_MMC_IO: 2694 /* XXX just like nmve_io? */ 2695 case XPT_RESET_DEV: 2696 case XPT_ENG_EXEC: 2697 case XPT_SMP_IO: 2698 { 2699 struct cam_devq *devq; 2700 2701 devq = path->bus->sim->devq; 2702 mtx_lock(&devq->send_mtx); 2703 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2704 if (xpt_schedule_devq(devq, path->device) != 0) 2705 xpt_run_devq(devq); 2706 mtx_unlock(&devq->send_mtx); 2707 break; 2708 } 2709 case XPT_CALC_GEOMETRY: 2710 /* Filter out garbage */ 2711 if (start_ccb->ccg.block_size == 0 2712 || start_ccb->ccg.volume_size == 0) { 2713 start_ccb->ccg.cylinders = 0; 2714 start_ccb->ccg.heads = 0; 2715 start_ccb->ccg.secs_per_track = 0; 2716 start_ccb->ccb_h.status = CAM_REQ_CMP; 2717 break; 2718 } 2719 #if defined(__sparc64__) 2720 /* 2721 * For sparc64, we may need adjust the geometry of large 2722 * disks in order to fit the limitations of the 16-bit 2723 * fields of the VTOC8 disk label. 2724 */ 2725 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2726 start_ccb->ccb_h.status = CAM_REQ_CMP; 2727 break; 2728 } 2729 #endif 2730 goto call_sim; 2731 case XPT_ABORT: 2732 { 2733 union ccb* abort_ccb; 2734 2735 abort_ccb = start_ccb->cab.abort_ccb; 2736 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2737 struct cam_ed *device; 2738 struct cam_devq *devq; 2739 2740 device = abort_ccb->ccb_h.path->device; 2741 devq = device->sim->devq; 2742 2743 mtx_lock(&devq->send_mtx); 2744 if (abort_ccb->ccb_h.pinfo.index > 0) { 2745 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb); 2746 abort_ccb->ccb_h.status = 2747 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2748 xpt_freeze_devq_device(device, 1); 2749 mtx_unlock(&devq->send_mtx); 2750 xpt_done(abort_ccb); 2751 start_ccb->ccb_h.status = CAM_REQ_CMP; 2752 break; 2753 } 2754 mtx_unlock(&devq->send_mtx); 2755 2756 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2757 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2758 /* 2759 * We've caught this ccb en route to 2760 * the SIM. Flag it for abort and the 2761 * SIM will do so just before starting 2762 * real work on the CCB. 2763 */ 2764 abort_ccb->ccb_h.status = 2765 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2766 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2767 start_ccb->ccb_h.status = CAM_REQ_CMP; 2768 break; 2769 } 2770 } 2771 if (XPT_FC_IS_QUEUED(abort_ccb) 2772 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2773 /* 2774 * It's already completed but waiting 2775 * for our SWI to get to it. 2776 */ 2777 start_ccb->ccb_h.status = CAM_UA_ABORT; 2778 break; 2779 } 2780 /* 2781 * If we weren't able to take care of the abort request 2782 * in the XPT, pass the request down to the SIM for processing. 2783 */ 2784 } 2785 /* FALLTHROUGH */ 2786 case XPT_ACCEPT_TARGET_IO: 2787 case XPT_EN_LUN: 2788 case XPT_IMMED_NOTIFY: 2789 case XPT_NOTIFY_ACK: 2790 case XPT_RESET_BUS: 2791 case XPT_IMMEDIATE_NOTIFY: 2792 case XPT_NOTIFY_ACKNOWLEDGE: 2793 case XPT_GET_SIM_KNOB_OLD: 2794 case XPT_GET_SIM_KNOB: 2795 case XPT_SET_SIM_KNOB: 2796 case XPT_GET_TRAN_SETTINGS: 2797 case XPT_SET_TRAN_SETTINGS: 2798 case XPT_PATH_INQ: 2799 call_sim: 2800 sim = path->bus->sim; 2801 mtx = sim->mtx; 2802 if (mtx && !mtx_owned(mtx)) 2803 mtx_lock(mtx); 2804 else 2805 mtx = NULL; 2806 2807 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2808 ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code)); 2809 (*(sim->sim_action))(sim, start_ccb); 2810 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2811 ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status)); 2812 if (mtx) 2813 mtx_unlock(mtx); 2814 break; 2815 case XPT_PATH_STATS: 2816 start_ccb->cpis.last_reset = path->bus->last_reset; 2817 start_ccb->ccb_h.status = CAM_REQ_CMP; 2818 break; 2819 case XPT_GDEV_TYPE: 2820 { 2821 struct cam_ed *dev; 2822 2823 dev = path->device; 2824 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2825 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2826 } else { 2827 struct ccb_getdev *cgd; 2828 2829 cgd = &start_ccb->cgd; 2830 cgd->protocol = dev->protocol; 2831 cgd->inq_data = dev->inq_data; 2832 cgd->ident_data = dev->ident_data; 2833 cgd->inq_flags = dev->inq_flags; 2834 cgd->ccb_h.status = CAM_REQ_CMP; 2835 cgd->serial_num_len = dev->serial_num_len; 2836 if ((dev->serial_num_len > 0) 2837 && (dev->serial_num != NULL)) 2838 bcopy(dev->serial_num, cgd->serial_num, 2839 dev->serial_num_len); 2840 } 2841 break; 2842 } 2843 case XPT_GDEV_STATS: 2844 { 2845 struct ccb_getdevstats *cgds = &start_ccb->cgds; 2846 struct cam_ed *dev = path->device; 2847 struct cam_eb *bus = path->bus; 2848 struct cam_et *tar = path->target; 2849 struct cam_devq *devq = bus->sim->devq; 2850 2851 mtx_lock(&devq->send_mtx); 2852 cgds->dev_openings = dev->ccbq.dev_openings; 2853 cgds->dev_active = dev->ccbq.dev_active; 2854 cgds->allocated = dev->ccbq.allocated; 2855 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2856 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued; 2857 cgds->last_reset = tar->last_reset; 2858 cgds->maxtags = dev->maxtags; 2859 cgds->mintags = dev->mintags; 2860 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2861 cgds->last_reset = bus->last_reset; 2862 mtx_unlock(&devq->send_mtx); 2863 cgds->ccb_h.status = CAM_REQ_CMP; 2864 break; 2865 } 2866 case XPT_GDEVLIST: 2867 { 2868 struct cam_periph *nperiph; 2869 struct periph_list *periph_head; 2870 struct ccb_getdevlist *cgdl; 2871 u_int i; 2872 struct cam_ed *device; 2873 int found; 2874 2875 2876 found = 0; 2877 2878 /* 2879 * Don't want anyone mucking with our data. 2880 */ 2881 device = path->device; 2882 periph_head = &device->periphs; 2883 cgdl = &start_ccb->cgdl; 2884 2885 /* 2886 * Check and see if the list has changed since the user 2887 * last requested a list member. If so, tell them that the 2888 * list has changed, and therefore they need to start over 2889 * from the beginning. 2890 */ 2891 if ((cgdl->index != 0) && 2892 (cgdl->generation != device->generation)) { 2893 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2894 break; 2895 } 2896 2897 /* 2898 * Traverse the list of peripherals and attempt to find 2899 * the requested peripheral. 2900 */ 2901 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2902 (nperiph != NULL) && (i <= cgdl->index); 2903 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2904 if (i == cgdl->index) { 2905 strlcpy(cgdl->periph_name, 2906 nperiph->periph_name, 2907 sizeof(cgdl->periph_name)); 2908 cgdl->unit_number = nperiph->unit_number; 2909 found = 1; 2910 } 2911 } 2912 if (found == 0) { 2913 cgdl->status = CAM_GDEVLIST_ERROR; 2914 break; 2915 } 2916 2917 if (nperiph == NULL) 2918 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2919 else 2920 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2921 2922 cgdl->index++; 2923 cgdl->generation = device->generation; 2924 2925 cgdl->ccb_h.status = CAM_REQ_CMP; 2926 break; 2927 } 2928 case XPT_DEV_MATCH: 2929 { 2930 dev_pos_type position_type; 2931 struct ccb_dev_match *cdm; 2932 2933 cdm = &start_ccb->cdm; 2934 2935 /* 2936 * There are two ways of getting at information in the EDT. 2937 * The first way is via the primary EDT tree. It starts 2938 * with a list of buses, then a list of targets on a bus, 2939 * then devices/luns on a target, and then peripherals on a 2940 * device/lun. The "other" way is by the peripheral driver 2941 * lists. The peripheral driver lists are organized by 2942 * peripheral driver. (obviously) So it makes sense to 2943 * use the peripheral driver list if the user is looking 2944 * for something like "da1", or all "da" devices. If the 2945 * user is looking for something on a particular bus/target 2946 * or lun, it's generally better to go through the EDT tree. 2947 */ 2948 2949 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2950 position_type = cdm->pos.position_type; 2951 else { 2952 u_int i; 2953 2954 position_type = CAM_DEV_POS_NONE; 2955 2956 for (i = 0; i < cdm->num_patterns; i++) { 2957 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2958 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2959 position_type = CAM_DEV_POS_EDT; 2960 break; 2961 } 2962 } 2963 2964 if (cdm->num_patterns == 0) 2965 position_type = CAM_DEV_POS_EDT; 2966 else if (position_type == CAM_DEV_POS_NONE) 2967 position_type = CAM_DEV_POS_PDRV; 2968 } 2969 2970 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2971 case CAM_DEV_POS_EDT: 2972 xptedtmatch(cdm); 2973 break; 2974 case CAM_DEV_POS_PDRV: 2975 xptperiphlistmatch(cdm); 2976 break; 2977 default: 2978 cdm->status = CAM_DEV_MATCH_ERROR; 2979 break; 2980 } 2981 2982 if (cdm->status == CAM_DEV_MATCH_ERROR) 2983 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2984 else 2985 start_ccb->ccb_h.status = CAM_REQ_CMP; 2986 2987 break; 2988 } 2989 case XPT_SASYNC_CB: 2990 { 2991 struct ccb_setasync *csa; 2992 struct async_node *cur_entry; 2993 struct async_list *async_head; 2994 u_int32_t added; 2995 2996 csa = &start_ccb->csa; 2997 added = csa->event_enable; 2998 async_head = &path->device->asyncs; 2999 3000 /* 3001 * If there is already an entry for us, simply 3002 * update it. 3003 */ 3004 cur_entry = SLIST_FIRST(async_head); 3005 while (cur_entry != NULL) { 3006 if ((cur_entry->callback_arg == csa->callback_arg) 3007 && (cur_entry->callback == csa->callback)) 3008 break; 3009 cur_entry = SLIST_NEXT(cur_entry, links); 3010 } 3011 3012 if (cur_entry != NULL) { 3013 /* 3014 * If the request has no flags set, 3015 * remove the entry. 3016 */ 3017 added &= ~cur_entry->event_enable; 3018 if (csa->event_enable == 0) { 3019 SLIST_REMOVE(async_head, cur_entry, 3020 async_node, links); 3021 xpt_release_device(path->device); 3022 free(cur_entry, M_CAMXPT); 3023 } else { 3024 cur_entry->event_enable = csa->event_enable; 3025 } 3026 csa->event_enable = added; 3027 } else { 3028 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 3029 M_NOWAIT); 3030 if (cur_entry == NULL) { 3031 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 3032 break; 3033 } 3034 cur_entry->event_enable = csa->event_enable; 3035 cur_entry->event_lock = (path->bus->sim->mtx && 3036 mtx_owned(path->bus->sim->mtx)) ? 1 : 0; 3037 cur_entry->callback_arg = csa->callback_arg; 3038 cur_entry->callback = csa->callback; 3039 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3040 xpt_acquire_device(path->device); 3041 } 3042 start_ccb->ccb_h.status = CAM_REQ_CMP; 3043 break; 3044 } 3045 case XPT_REL_SIMQ: 3046 { 3047 struct ccb_relsim *crs; 3048 struct cam_ed *dev; 3049 3050 crs = &start_ccb->crs; 3051 dev = path->device; 3052 if (dev == NULL) { 3053 3054 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3055 break; 3056 } 3057 3058 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3059 3060 /* Don't ever go below one opening */ 3061 if (crs->openings > 0) { 3062 xpt_dev_ccbq_resize(path, crs->openings); 3063 if (bootverbose) { 3064 xpt_print(path, 3065 "number of openings is now %d\n", 3066 crs->openings); 3067 } 3068 } 3069 } 3070 3071 mtx_lock(&dev->sim->devq->send_mtx); 3072 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3073 3074 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3075 3076 /* 3077 * Just extend the old timeout and decrement 3078 * the freeze count so that a single timeout 3079 * is sufficient for releasing the queue. 3080 */ 3081 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3082 callout_stop(&dev->callout); 3083 } else { 3084 3085 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3086 } 3087 3088 callout_reset_sbt(&dev->callout, 3089 SBT_1MS * crs->release_timeout, 0, 3090 xpt_release_devq_timeout, dev, 0); 3091 3092 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3093 3094 } 3095 3096 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3097 3098 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3099 /* 3100 * Decrement the freeze count so that a single 3101 * completion is still sufficient to unfreeze 3102 * the queue. 3103 */ 3104 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3105 } else { 3106 3107 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3108 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3109 } 3110 } 3111 3112 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3113 3114 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3115 || (dev->ccbq.dev_active == 0)) { 3116 3117 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3118 } else { 3119 3120 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3121 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3122 } 3123 } 3124 mtx_unlock(&dev->sim->devq->send_mtx); 3125 3126 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 3127 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 3128 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 3129 start_ccb->ccb_h.status = CAM_REQ_CMP; 3130 break; 3131 } 3132 case XPT_DEBUG: { 3133 struct cam_path *oldpath; 3134 3135 /* Check that all request bits are supported. */ 3136 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 3137 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3138 break; 3139 } 3140 3141 cam_dflags = CAM_DEBUG_NONE; 3142 if (cam_dpath != NULL) { 3143 oldpath = cam_dpath; 3144 cam_dpath = NULL; 3145 xpt_free_path(oldpath); 3146 } 3147 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 3148 if (xpt_create_path(&cam_dpath, NULL, 3149 start_ccb->ccb_h.path_id, 3150 start_ccb->ccb_h.target_id, 3151 start_ccb->ccb_h.target_lun) != 3152 CAM_REQ_CMP) { 3153 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3154 } else { 3155 cam_dflags = start_ccb->cdbg.flags; 3156 start_ccb->ccb_h.status = CAM_REQ_CMP; 3157 xpt_print(cam_dpath, "debugging flags now %x\n", 3158 cam_dflags); 3159 } 3160 } else 3161 start_ccb->ccb_h.status = CAM_REQ_CMP; 3162 break; 3163 } 3164 case XPT_NOOP: 3165 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3166 xpt_freeze_devq(path, 1); 3167 start_ccb->ccb_h.status = CAM_REQ_CMP; 3168 break; 3169 case XPT_REPROBE_LUN: 3170 xpt_async(AC_INQ_CHANGED, path, NULL); 3171 start_ccb->ccb_h.status = CAM_REQ_CMP; 3172 xpt_done(start_ccb); 3173 break; 3174 default: 3175 case XPT_SDEV_TYPE: 3176 case XPT_TERM_IO: 3177 case XPT_ENG_INQ: 3178 /* XXX Implement */ 3179 xpt_print(start_ccb->ccb_h.path, 3180 "%s: CCB type %#x %s not supported\n", __func__, 3181 start_ccb->ccb_h.func_code, 3182 xpt_action_name(start_ccb->ccb_h.func_code)); 3183 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3184 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3185 xpt_done(start_ccb); 3186 } 3187 break; 3188 } 3189 CAM_DEBUG(path, CAM_DEBUG_TRACE, 3190 ("xpt_action_default: func= %#x %s status %#x\n", 3191 start_ccb->ccb_h.func_code, 3192 xpt_action_name(start_ccb->ccb_h.func_code), 3193 start_ccb->ccb_h.status)); 3194 } 3195 3196 /* 3197 * Call the sim poll routine to allow the sim to complete 3198 * any inflight requests, then call camisr_runqueue to 3199 * complete any CCB that the polling completed. 3200 */ 3201 void 3202 xpt_sim_poll(struct cam_sim *sim) 3203 { 3204 struct mtx *mtx; 3205 3206 mtx = sim->mtx; 3207 if (mtx) 3208 mtx_lock(mtx); 3209 (*(sim->sim_poll))(sim); 3210 if (mtx) 3211 mtx_unlock(mtx); 3212 camisr_runqueue(); 3213 } 3214 3215 uint32_t 3216 xpt_poll_setup(union ccb *start_ccb) 3217 { 3218 u_int32_t timeout; 3219 struct cam_sim *sim; 3220 struct cam_devq *devq; 3221 struct cam_ed *dev; 3222 3223 timeout = start_ccb->ccb_h.timeout * 10; 3224 sim = start_ccb->ccb_h.path->bus->sim; 3225 devq = sim->devq; 3226 dev = start_ccb->ccb_h.path->device; 3227 3228 /* 3229 * Steal an opening so that no other queued requests 3230 * can get it before us while we simulate interrupts. 3231 */ 3232 mtx_lock(&devq->send_mtx); 3233 dev->ccbq.dev_openings--; 3234 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3235 (--timeout > 0)) { 3236 mtx_unlock(&devq->send_mtx); 3237 DELAY(100); 3238 xpt_sim_poll(sim); 3239 mtx_lock(&devq->send_mtx); 3240 } 3241 dev->ccbq.dev_openings++; 3242 mtx_unlock(&devq->send_mtx); 3243 3244 return (timeout); 3245 } 3246 3247 void 3248 xpt_pollwait(union ccb *start_ccb, uint32_t timeout) 3249 { 3250 3251 while (--timeout > 0) { 3252 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim); 3253 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3254 != CAM_REQ_INPROG) 3255 break; 3256 DELAY(100); 3257 } 3258 3259 if (timeout == 0) { 3260 /* 3261 * XXX Is it worth adding a sim_timeout entry 3262 * point so we can attempt recovery? If 3263 * this is only used for dumps, I don't think 3264 * it is. 3265 */ 3266 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3267 } 3268 } 3269 3270 void 3271 xpt_polled_action(union ccb *start_ccb) 3272 { 3273 uint32_t timeout; 3274 struct cam_ed *dev; 3275 3276 timeout = start_ccb->ccb_h.timeout * 10; 3277 dev = start_ccb->ccb_h.path->device; 3278 3279 mtx_unlock(&dev->device_mtx); 3280 3281 timeout = xpt_poll_setup(start_ccb); 3282 if (timeout > 0) { 3283 xpt_action(start_ccb); 3284 xpt_pollwait(start_ccb, timeout); 3285 } else { 3286 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3287 } 3288 3289 mtx_lock(&dev->device_mtx); 3290 } 3291 3292 /* 3293 * Schedule a peripheral driver to receive a ccb when its 3294 * target device has space for more transactions. 3295 */ 3296 void 3297 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3298 { 3299 3300 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3301 cam_periph_assert(periph, MA_OWNED); 3302 if (new_priority < periph->scheduled_priority) { 3303 periph->scheduled_priority = new_priority; 3304 xpt_run_allocq(periph, 0); 3305 } 3306 } 3307 3308 3309 /* 3310 * Schedule a device to run on a given queue. 3311 * If the device was inserted as a new entry on the queue, 3312 * return 1 meaning the device queue should be run. If we 3313 * were already queued, implying someone else has already 3314 * started the queue, return 0 so the caller doesn't attempt 3315 * to run the queue. 3316 */ 3317 static int 3318 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3319 u_int32_t new_priority) 3320 { 3321 int retval; 3322 u_int32_t old_priority; 3323 3324 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3325 3326 3327 old_priority = pinfo->priority; 3328 3329 /* 3330 * Are we already queued? 3331 */ 3332 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3333 /* Simply reorder based on new priority */ 3334 if (new_priority < old_priority) { 3335 camq_change_priority(queue, pinfo->index, 3336 new_priority); 3337 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3338 ("changed priority to %d\n", 3339 new_priority)); 3340 retval = 1; 3341 } else 3342 retval = 0; 3343 } else { 3344 /* New entry on the queue */ 3345 if (new_priority < old_priority) 3346 pinfo->priority = new_priority; 3347 3348 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3349 ("Inserting onto queue\n")); 3350 pinfo->generation = ++queue->generation; 3351 camq_insert(queue, pinfo); 3352 retval = 1; 3353 } 3354 return (retval); 3355 } 3356 3357 static void 3358 xpt_run_allocq_task(void *context, int pending) 3359 { 3360 struct cam_periph *periph = context; 3361 3362 cam_periph_lock(periph); 3363 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3364 xpt_run_allocq(periph, 1); 3365 cam_periph_unlock(periph); 3366 cam_periph_release(periph); 3367 } 3368 3369 static void 3370 xpt_run_allocq(struct cam_periph *periph, int sleep) 3371 { 3372 struct cam_ed *device; 3373 union ccb *ccb; 3374 uint32_t prio; 3375 3376 cam_periph_assert(periph, MA_OWNED); 3377 if (periph->periph_allocating) 3378 return; 3379 cam_periph_doacquire(periph); 3380 periph->periph_allocating = 1; 3381 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3382 device = periph->path->device; 3383 ccb = NULL; 3384 restart: 3385 while ((prio = min(periph->scheduled_priority, 3386 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3387 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3388 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3389 3390 if (ccb == NULL && 3391 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3392 if (sleep) { 3393 ccb = xpt_get_ccb(periph); 3394 goto restart; 3395 } 3396 if (periph->flags & CAM_PERIPH_RUN_TASK) 3397 break; 3398 cam_periph_doacquire(periph); 3399 periph->flags |= CAM_PERIPH_RUN_TASK; 3400 taskqueue_enqueue(xsoftc.xpt_taskq, 3401 &periph->periph_run_task); 3402 break; 3403 } 3404 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3405 if (prio == periph->immediate_priority) { 3406 periph->immediate_priority = CAM_PRIORITY_NONE; 3407 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3408 ("waking cam_periph_getccb()\n")); 3409 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3410 periph_links.sle); 3411 wakeup(&periph->ccb_list); 3412 } else { 3413 periph->scheduled_priority = CAM_PRIORITY_NONE; 3414 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3415 ("calling periph_start()\n")); 3416 periph->periph_start(periph, ccb); 3417 } 3418 ccb = NULL; 3419 } 3420 if (ccb != NULL) 3421 xpt_release_ccb(ccb); 3422 periph->periph_allocating = 0; 3423 cam_periph_release_locked(periph); 3424 } 3425 3426 static void 3427 xpt_run_devq(struct cam_devq *devq) 3428 { 3429 struct mtx *mtx; 3430 3431 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3432 3433 devq->send_queue.qfrozen_cnt++; 3434 while ((devq->send_queue.entries > 0) 3435 && (devq->send_openings > 0) 3436 && (devq->send_queue.qfrozen_cnt <= 1)) { 3437 struct cam_ed *device; 3438 union ccb *work_ccb; 3439 struct cam_sim *sim; 3440 struct xpt_proto *proto; 3441 3442 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3443 CAMQ_HEAD); 3444 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3445 ("running device %p\n", device)); 3446 3447 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3448 if (work_ccb == NULL) { 3449 printf("device on run queue with no ccbs???\n"); 3450 continue; 3451 } 3452 3453 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3454 3455 mtx_lock(&xsoftc.xpt_highpower_lock); 3456 if (xsoftc.num_highpower <= 0) { 3457 /* 3458 * We got a high power command, but we 3459 * don't have any available slots. Freeze 3460 * the device queue until we have a slot 3461 * available. 3462 */ 3463 xpt_freeze_devq_device(device, 1); 3464 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3465 highpowerq_entry); 3466 3467 mtx_unlock(&xsoftc.xpt_highpower_lock); 3468 continue; 3469 } else { 3470 /* 3471 * Consume a high power slot while 3472 * this ccb runs. 3473 */ 3474 xsoftc.num_highpower--; 3475 } 3476 mtx_unlock(&xsoftc.xpt_highpower_lock); 3477 } 3478 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3479 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3480 devq->send_openings--; 3481 devq->send_active++; 3482 xpt_schedule_devq(devq, device); 3483 mtx_unlock(&devq->send_mtx); 3484 3485 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3486 /* 3487 * The client wants to freeze the queue 3488 * after this CCB is sent. 3489 */ 3490 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3491 } 3492 3493 /* In Target mode, the peripheral driver knows best... */ 3494 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3495 if ((device->inq_flags & SID_CmdQue) != 0 3496 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3497 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3498 else 3499 /* 3500 * Clear this in case of a retried CCB that 3501 * failed due to a rejected tag. 3502 */ 3503 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3504 } 3505 3506 KASSERT(device == work_ccb->ccb_h.path->device, 3507 ("device (%p) / path->device (%p) mismatch", 3508 device, work_ccb->ccb_h.path->device)); 3509 proto = xpt_proto_find(device->protocol); 3510 if (proto && proto->ops->debug_out) 3511 proto->ops->debug_out(work_ccb); 3512 3513 /* 3514 * Device queues can be shared among multiple SIM instances 3515 * that reside on different buses. Use the SIM from the 3516 * queued device, rather than the one from the calling bus. 3517 */ 3518 sim = device->sim; 3519 mtx = sim->mtx; 3520 if (mtx && !mtx_owned(mtx)) 3521 mtx_lock(mtx); 3522 else 3523 mtx = NULL; 3524 work_ccb->ccb_h.qos.periph_data = cam_iosched_now(); 3525 (*(sim->sim_action))(sim, work_ccb); 3526 if (mtx) 3527 mtx_unlock(mtx); 3528 mtx_lock(&devq->send_mtx); 3529 } 3530 devq->send_queue.qfrozen_cnt--; 3531 } 3532 3533 /* 3534 * This function merges stuff from the slave ccb into the master ccb, while 3535 * keeping important fields in the master ccb constant. 3536 */ 3537 void 3538 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3539 { 3540 3541 /* 3542 * Pull fields that are valid for peripheral drivers to set 3543 * into the master CCB along with the CCB "payload". 3544 */ 3545 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3546 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3547 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3548 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3549 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3550 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3551 } 3552 3553 void 3554 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path, 3555 u_int32_t priority, u_int32_t flags) 3556 { 3557 3558 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3559 ccb_h->pinfo.priority = priority; 3560 ccb_h->path = path; 3561 ccb_h->path_id = path->bus->path_id; 3562 if (path->target) 3563 ccb_h->target_id = path->target->target_id; 3564 else 3565 ccb_h->target_id = CAM_TARGET_WILDCARD; 3566 if (path->device) { 3567 ccb_h->target_lun = path->device->lun_id; 3568 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3569 } else { 3570 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3571 } 3572 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3573 ccb_h->flags = flags; 3574 ccb_h->xflags = 0; 3575 } 3576 3577 void 3578 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3579 { 3580 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0); 3581 } 3582 3583 /* Path manipulation functions */ 3584 cam_status 3585 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3586 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3587 { 3588 struct cam_path *path; 3589 cam_status status; 3590 3591 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3592 3593 if (path == NULL) { 3594 status = CAM_RESRC_UNAVAIL; 3595 return(status); 3596 } 3597 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3598 if (status != CAM_REQ_CMP) { 3599 free(path, M_CAMPATH); 3600 path = NULL; 3601 } 3602 *new_path_ptr = path; 3603 return (status); 3604 } 3605 3606 cam_status 3607 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3608 struct cam_periph *periph, path_id_t path_id, 3609 target_id_t target_id, lun_id_t lun_id) 3610 { 3611 3612 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3613 lun_id)); 3614 } 3615 3616 cam_status 3617 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3618 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3619 { 3620 struct cam_eb *bus; 3621 struct cam_et *target; 3622 struct cam_ed *device; 3623 cam_status status; 3624 3625 status = CAM_REQ_CMP; /* Completed without error */ 3626 target = NULL; /* Wildcarded */ 3627 device = NULL; /* Wildcarded */ 3628 3629 /* 3630 * We will potentially modify the EDT, so block interrupts 3631 * that may attempt to create cam paths. 3632 */ 3633 bus = xpt_find_bus(path_id); 3634 if (bus == NULL) { 3635 status = CAM_PATH_INVALID; 3636 } else { 3637 xpt_lock_buses(); 3638 mtx_lock(&bus->eb_mtx); 3639 target = xpt_find_target(bus, target_id); 3640 if (target == NULL) { 3641 /* Create one */ 3642 struct cam_et *new_target; 3643 3644 new_target = xpt_alloc_target(bus, target_id); 3645 if (new_target == NULL) { 3646 status = CAM_RESRC_UNAVAIL; 3647 } else { 3648 target = new_target; 3649 } 3650 } 3651 xpt_unlock_buses(); 3652 if (target != NULL) { 3653 device = xpt_find_device(target, lun_id); 3654 if (device == NULL) { 3655 /* Create one */ 3656 struct cam_ed *new_device; 3657 3658 new_device = 3659 (*(bus->xport->ops->alloc_device))(bus, 3660 target, 3661 lun_id); 3662 if (new_device == NULL) { 3663 status = CAM_RESRC_UNAVAIL; 3664 } else { 3665 device = new_device; 3666 } 3667 } 3668 } 3669 mtx_unlock(&bus->eb_mtx); 3670 } 3671 3672 /* 3673 * Only touch the user's data if we are successful. 3674 */ 3675 if (status == CAM_REQ_CMP) { 3676 new_path->periph = perph; 3677 new_path->bus = bus; 3678 new_path->target = target; 3679 new_path->device = device; 3680 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3681 } else { 3682 if (device != NULL) 3683 xpt_release_device(device); 3684 if (target != NULL) 3685 xpt_release_target(target); 3686 if (bus != NULL) 3687 xpt_release_bus(bus); 3688 } 3689 return (status); 3690 } 3691 3692 cam_status 3693 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3694 { 3695 struct cam_path *new_path; 3696 3697 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3698 if (new_path == NULL) 3699 return(CAM_RESRC_UNAVAIL); 3700 xpt_copy_path(new_path, path); 3701 *new_path_ptr = new_path; 3702 return (CAM_REQ_CMP); 3703 } 3704 3705 void 3706 xpt_copy_path(struct cam_path *new_path, struct cam_path *path) 3707 { 3708 3709 *new_path = *path; 3710 if (path->bus != NULL) 3711 xpt_acquire_bus(path->bus); 3712 if (path->target != NULL) 3713 xpt_acquire_target(path->target); 3714 if (path->device != NULL) 3715 xpt_acquire_device(path->device); 3716 } 3717 3718 void 3719 xpt_release_path(struct cam_path *path) 3720 { 3721 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3722 if (path->device != NULL) { 3723 xpt_release_device(path->device); 3724 path->device = NULL; 3725 } 3726 if (path->target != NULL) { 3727 xpt_release_target(path->target); 3728 path->target = NULL; 3729 } 3730 if (path->bus != NULL) { 3731 xpt_release_bus(path->bus); 3732 path->bus = NULL; 3733 } 3734 } 3735 3736 void 3737 xpt_free_path(struct cam_path *path) 3738 { 3739 3740 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3741 xpt_release_path(path); 3742 free(path, M_CAMPATH); 3743 } 3744 3745 void 3746 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3747 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3748 { 3749 3750 xpt_lock_buses(); 3751 if (bus_ref) { 3752 if (path->bus) 3753 *bus_ref = path->bus->refcount; 3754 else 3755 *bus_ref = 0; 3756 } 3757 if (periph_ref) { 3758 if (path->periph) 3759 *periph_ref = path->periph->refcount; 3760 else 3761 *periph_ref = 0; 3762 } 3763 xpt_unlock_buses(); 3764 if (target_ref) { 3765 if (path->target) 3766 *target_ref = path->target->refcount; 3767 else 3768 *target_ref = 0; 3769 } 3770 if (device_ref) { 3771 if (path->device) 3772 *device_ref = path->device->refcount; 3773 else 3774 *device_ref = 0; 3775 } 3776 } 3777 3778 /* 3779 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3780 * in path1, 2 for match with wildcards in path2. 3781 */ 3782 int 3783 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3784 { 3785 int retval = 0; 3786 3787 if (path1->bus != path2->bus) { 3788 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3789 retval = 1; 3790 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3791 retval = 2; 3792 else 3793 return (-1); 3794 } 3795 if (path1->target != path2->target) { 3796 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3797 if (retval == 0) 3798 retval = 1; 3799 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3800 retval = 2; 3801 else 3802 return (-1); 3803 } 3804 if (path1->device != path2->device) { 3805 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3806 if (retval == 0) 3807 retval = 1; 3808 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3809 retval = 2; 3810 else 3811 return (-1); 3812 } 3813 return (retval); 3814 } 3815 3816 int 3817 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3818 { 3819 int retval = 0; 3820 3821 if (path->bus != dev->target->bus) { 3822 if (path->bus->path_id == CAM_BUS_WILDCARD) 3823 retval = 1; 3824 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3825 retval = 2; 3826 else 3827 return (-1); 3828 } 3829 if (path->target != dev->target) { 3830 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3831 if (retval == 0) 3832 retval = 1; 3833 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3834 retval = 2; 3835 else 3836 return (-1); 3837 } 3838 if (path->device != dev) { 3839 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3840 if (retval == 0) 3841 retval = 1; 3842 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3843 retval = 2; 3844 else 3845 return (-1); 3846 } 3847 return (retval); 3848 } 3849 3850 void 3851 xpt_print_path(struct cam_path *path) 3852 { 3853 struct sbuf sb; 3854 char buffer[XPT_PRINT_LEN]; 3855 3856 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3857 xpt_path_sbuf(path, &sb); 3858 sbuf_finish(&sb); 3859 printf("%s", sbuf_data(&sb)); 3860 sbuf_delete(&sb); 3861 } 3862 3863 void 3864 xpt_print_device(struct cam_ed *device) 3865 { 3866 3867 if (device == NULL) 3868 printf("(nopath): "); 3869 else { 3870 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3871 device->sim->unit_number, 3872 device->sim->bus_id, 3873 device->target->target_id, 3874 (uintmax_t)device->lun_id); 3875 } 3876 } 3877 3878 void 3879 xpt_print(struct cam_path *path, const char *fmt, ...) 3880 { 3881 va_list ap; 3882 struct sbuf sb; 3883 char buffer[XPT_PRINT_LEN]; 3884 3885 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3886 3887 xpt_path_sbuf(path, &sb); 3888 va_start(ap, fmt); 3889 sbuf_vprintf(&sb, fmt, ap); 3890 va_end(ap); 3891 3892 sbuf_finish(&sb); 3893 printf("%s", sbuf_data(&sb)); 3894 sbuf_delete(&sb); 3895 } 3896 3897 int 3898 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3899 { 3900 struct sbuf sb; 3901 int len; 3902 3903 sbuf_new(&sb, str, str_len, 0); 3904 len = xpt_path_sbuf(path, &sb); 3905 sbuf_finish(&sb); 3906 return (len); 3907 } 3908 3909 int 3910 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb) 3911 { 3912 3913 if (path == NULL) 3914 sbuf_printf(sb, "(nopath): "); 3915 else { 3916 if (path->periph != NULL) 3917 sbuf_printf(sb, "(%s%d:", path->periph->periph_name, 3918 path->periph->unit_number); 3919 else 3920 sbuf_printf(sb, "(noperiph:"); 3921 3922 if (path->bus != NULL) 3923 sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name, 3924 path->bus->sim->unit_number, 3925 path->bus->sim->bus_id); 3926 else 3927 sbuf_printf(sb, "nobus:"); 3928 3929 if (path->target != NULL) 3930 sbuf_printf(sb, "%d:", path->target->target_id); 3931 else 3932 sbuf_printf(sb, "X:"); 3933 3934 if (path->device != NULL) 3935 sbuf_printf(sb, "%jx): ", 3936 (uintmax_t)path->device->lun_id); 3937 else 3938 sbuf_printf(sb, "X): "); 3939 } 3940 3941 return(sbuf_len(sb)); 3942 } 3943 3944 path_id_t 3945 xpt_path_path_id(struct cam_path *path) 3946 { 3947 return(path->bus->path_id); 3948 } 3949 3950 target_id_t 3951 xpt_path_target_id(struct cam_path *path) 3952 { 3953 if (path->target != NULL) 3954 return (path->target->target_id); 3955 else 3956 return (CAM_TARGET_WILDCARD); 3957 } 3958 3959 lun_id_t 3960 xpt_path_lun_id(struct cam_path *path) 3961 { 3962 if (path->device != NULL) 3963 return (path->device->lun_id); 3964 else 3965 return (CAM_LUN_WILDCARD); 3966 } 3967 3968 struct cam_sim * 3969 xpt_path_sim(struct cam_path *path) 3970 { 3971 3972 return (path->bus->sim); 3973 } 3974 3975 struct cam_periph* 3976 xpt_path_periph(struct cam_path *path) 3977 { 3978 3979 return (path->periph); 3980 } 3981 3982 /* 3983 * Release a CAM control block for the caller. Remit the cost of the structure 3984 * to the device referenced by the path. If the this device had no 'credits' 3985 * and peripheral drivers have registered async callbacks for this notification 3986 * call them now. 3987 */ 3988 void 3989 xpt_release_ccb(union ccb *free_ccb) 3990 { 3991 struct cam_ed *device; 3992 struct cam_periph *periph; 3993 3994 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3995 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3996 device = free_ccb->ccb_h.path->device; 3997 periph = free_ccb->ccb_h.path->periph; 3998 3999 xpt_free_ccb(free_ccb); 4000 periph->periph_allocated--; 4001 cam_ccbq_release_opening(&device->ccbq); 4002 xpt_run_allocq(periph, 0); 4003 } 4004 4005 /* Functions accessed by SIM drivers */ 4006 4007 static struct xpt_xport_ops xport_default_ops = { 4008 .alloc_device = xpt_alloc_device_default, 4009 .action = xpt_action_default, 4010 .async = xpt_dev_async_default, 4011 }; 4012 static struct xpt_xport xport_default = { 4013 .xport = XPORT_UNKNOWN, 4014 .name = "unknown", 4015 .ops = &xport_default_ops, 4016 }; 4017 4018 CAM_XPT_XPORT(xport_default); 4019 4020 /* 4021 * A sim structure, listing the SIM entry points and instance 4022 * identification info is passed to xpt_bus_register to hook the SIM 4023 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4024 * for this new bus and places it in the array of buses and assigns 4025 * it a path_id. The path_id may be influenced by "hard wiring" 4026 * information specified by the user. Once interrupt services are 4027 * available, the bus will be probed. 4028 */ 4029 int32_t 4030 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 4031 { 4032 struct cam_eb *new_bus; 4033 struct cam_eb *old_bus; 4034 struct ccb_pathinq cpi; 4035 struct cam_path *path; 4036 cam_status status; 4037 4038 sim->bus_id = bus; 4039 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 4040 M_CAMXPT, M_NOWAIT|M_ZERO); 4041 if (new_bus == NULL) { 4042 /* Couldn't satisfy request */ 4043 return (CAM_RESRC_UNAVAIL); 4044 } 4045 4046 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 4047 TAILQ_INIT(&new_bus->et_entries); 4048 cam_sim_hold(sim); 4049 new_bus->sim = sim; 4050 timevalclear(&new_bus->last_reset); 4051 new_bus->flags = 0; 4052 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4053 new_bus->generation = 0; 4054 4055 xpt_lock_buses(); 4056 sim->path_id = new_bus->path_id = 4057 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4058 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4059 while (old_bus != NULL 4060 && old_bus->path_id < new_bus->path_id) 4061 old_bus = TAILQ_NEXT(old_bus, links); 4062 if (old_bus != NULL) 4063 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4064 else 4065 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4066 xsoftc.bus_generation++; 4067 xpt_unlock_buses(); 4068 4069 /* 4070 * Set a default transport so that a PATH_INQ can be issued to 4071 * the SIM. This will then allow for probing and attaching of 4072 * a more appropriate transport. 4073 */ 4074 new_bus->xport = &xport_default; 4075 4076 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 4077 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4078 if (status != CAM_REQ_CMP) { 4079 xpt_release_bus(new_bus); 4080 return (CAM_RESRC_UNAVAIL); 4081 } 4082 4083 xpt_path_inq(&cpi, path); 4084 4085 if (cpi.ccb_h.status == CAM_REQ_CMP) { 4086 struct xpt_xport **xpt; 4087 4088 SET_FOREACH(xpt, cam_xpt_xport_set) { 4089 if ((*xpt)->xport == cpi.transport) { 4090 new_bus->xport = *xpt; 4091 break; 4092 } 4093 } 4094 if (new_bus->xport == NULL) { 4095 xpt_print(path, 4096 "No transport found for %d\n", cpi.transport); 4097 xpt_release_bus(new_bus); 4098 free(path, M_CAMXPT); 4099 return (CAM_RESRC_UNAVAIL); 4100 } 4101 } 4102 4103 /* Notify interested parties */ 4104 if (sim->path_id != CAM_XPT_PATH_ID) { 4105 4106 xpt_async(AC_PATH_REGISTERED, path, &cpi); 4107 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 4108 union ccb *scan_ccb; 4109 4110 /* Initiate bus rescan. */ 4111 scan_ccb = xpt_alloc_ccb_nowait(); 4112 if (scan_ccb != NULL) { 4113 scan_ccb->ccb_h.path = path; 4114 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 4115 scan_ccb->crcn.flags = 0; 4116 xpt_rescan(scan_ccb); 4117 } else { 4118 xpt_print(path, 4119 "Can't allocate CCB to scan bus\n"); 4120 xpt_free_path(path); 4121 } 4122 } else 4123 xpt_free_path(path); 4124 } else 4125 xpt_free_path(path); 4126 return (CAM_SUCCESS); 4127 } 4128 4129 int32_t 4130 xpt_bus_deregister(path_id_t pathid) 4131 { 4132 struct cam_path bus_path; 4133 cam_status status; 4134 4135 status = xpt_compile_path(&bus_path, NULL, pathid, 4136 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4137 if (status != CAM_REQ_CMP) 4138 return (status); 4139 4140 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4141 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4142 4143 /* Release the reference count held while registered. */ 4144 xpt_release_bus(bus_path.bus); 4145 xpt_release_path(&bus_path); 4146 4147 return (CAM_REQ_CMP); 4148 } 4149 4150 static path_id_t 4151 xptnextfreepathid(void) 4152 { 4153 struct cam_eb *bus; 4154 path_id_t pathid; 4155 const char *strval; 4156 4157 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4158 pathid = 0; 4159 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4160 retry: 4161 /* Find an unoccupied pathid */ 4162 while (bus != NULL && bus->path_id <= pathid) { 4163 if (bus->path_id == pathid) 4164 pathid++; 4165 bus = TAILQ_NEXT(bus, links); 4166 } 4167 4168 /* 4169 * Ensure that this pathid is not reserved for 4170 * a bus that may be registered in the future. 4171 */ 4172 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4173 ++pathid; 4174 /* Start the search over */ 4175 goto retry; 4176 } 4177 return (pathid); 4178 } 4179 4180 static path_id_t 4181 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4182 { 4183 path_id_t pathid; 4184 int i, dunit, val; 4185 char buf[32]; 4186 const char *dname; 4187 4188 pathid = CAM_XPT_PATH_ID; 4189 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4190 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 4191 return (pathid); 4192 i = 0; 4193 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4194 if (strcmp(dname, "scbus")) { 4195 /* Avoid a bit of foot shooting. */ 4196 continue; 4197 } 4198 if (dunit < 0) /* unwired?! */ 4199 continue; 4200 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4201 if (sim_bus == val) { 4202 pathid = dunit; 4203 break; 4204 } 4205 } else if (sim_bus == 0) { 4206 /* Unspecified matches bus 0 */ 4207 pathid = dunit; 4208 break; 4209 } else { 4210 printf("Ambiguous scbus configuration for %s%d " 4211 "bus %d, cannot wire down. The kernel " 4212 "config entry for scbus%d should " 4213 "specify a controller bus.\n" 4214 "Scbus will be assigned dynamically.\n", 4215 sim_name, sim_unit, sim_bus, dunit); 4216 break; 4217 } 4218 } 4219 4220 if (pathid == CAM_XPT_PATH_ID) 4221 pathid = xptnextfreepathid(); 4222 return (pathid); 4223 } 4224 4225 static const char * 4226 xpt_async_string(u_int32_t async_code) 4227 { 4228 4229 switch (async_code) { 4230 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4231 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4232 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4233 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4234 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4235 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4236 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4237 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4238 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4239 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4240 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4241 case AC_CONTRACT: return ("AC_CONTRACT"); 4242 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4243 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4244 } 4245 return ("AC_UNKNOWN"); 4246 } 4247 4248 static int 4249 xpt_async_size(u_int32_t async_code) 4250 { 4251 4252 switch (async_code) { 4253 case AC_BUS_RESET: return (0); 4254 case AC_UNSOL_RESEL: return (0); 4255 case AC_SCSI_AEN: return (0); 4256 case AC_SENT_BDR: return (0); 4257 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4258 case AC_PATH_DEREGISTERED: return (0); 4259 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4260 case AC_LOST_DEVICE: return (0); 4261 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4262 case AC_INQ_CHANGED: return (0); 4263 case AC_GETDEV_CHANGED: return (0); 4264 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4265 case AC_ADVINFO_CHANGED: return (-1); 4266 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4267 } 4268 return (0); 4269 } 4270 4271 static int 4272 xpt_async_process_dev(struct cam_ed *device, void *arg) 4273 { 4274 union ccb *ccb = arg; 4275 struct cam_path *path = ccb->ccb_h.path; 4276 void *async_arg = ccb->casync.async_arg_ptr; 4277 u_int32_t async_code = ccb->casync.async_code; 4278 int relock; 4279 4280 if (path->device != device 4281 && path->device->lun_id != CAM_LUN_WILDCARD 4282 && device->lun_id != CAM_LUN_WILDCARD) 4283 return (1); 4284 4285 /* 4286 * The async callback could free the device. 4287 * If it is a broadcast async, it doesn't hold 4288 * device reference, so take our own reference. 4289 */ 4290 xpt_acquire_device(device); 4291 4292 /* 4293 * If async for specific device is to be delivered to 4294 * the wildcard client, take the specific device lock. 4295 * XXX: We may need a way for client to specify it. 4296 */ 4297 if ((device->lun_id == CAM_LUN_WILDCARD && 4298 path->device->lun_id != CAM_LUN_WILDCARD) || 4299 (device->target->target_id == CAM_TARGET_WILDCARD && 4300 path->target->target_id != CAM_TARGET_WILDCARD) || 4301 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4302 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4303 mtx_unlock(&device->device_mtx); 4304 xpt_path_lock(path); 4305 relock = 1; 4306 } else 4307 relock = 0; 4308 4309 (*(device->target->bus->xport->ops->async))(async_code, 4310 device->target->bus, device->target, device, async_arg); 4311 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4312 4313 if (relock) { 4314 xpt_path_unlock(path); 4315 mtx_lock(&device->device_mtx); 4316 } 4317 xpt_release_device(device); 4318 return (1); 4319 } 4320 4321 static int 4322 xpt_async_process_tgt(struct cam_et *target, void *arg) 4323 { 4324 union ccb *ccb = arg; 4325 struct cam_path *path = ccb->ccb_h.path; 4326 4327 if (path->target != target 4328 && path->target->target_id != CAM_TARGET_WILDCARD 4329 && target->target_id != CAM_TARGET_WILDCARD) 4330 return (1); 4331 4332 if (ccb->casync.async_code == AC_SENT_BDR) { 4333 /* Update our notion of when the last reset occurred */ 4334 microtime(&target->last_reset); 4335 } 4336 4337 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4338 } 4339 4340 static void 4341 xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4342 { 4343 struct cam_eb *bus; 4344 struct cam_path *path; 4345 void *async_arg; 4346 u_int32_t async_code; 4347 4348 path = ccb->ccb_h.path; 4349 async_code = ccb->casync.async_code; 4350 async_arg = ccb->casync.async_arg_ptr; 4351 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4352 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4353 bus = path->bus; 4354 4355 if (async_code == AC_BUS_RESET) { 4356 /* Update our notion of when the last reset occurred */ 4357 microtime(&bus->last_reset); 4358 } 4359 4360 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4361 4362 /* 4363 * If this wasn't a fully wildcarded async, tell all 4364 * clients that want all async events. 4365 */ 4366 if (bus != xpt_periph->path->bus) { 4367 xpt_path_lock(xpt_periph->path); 4368 xpt_async_process_dev(xpt_periph->path->device, ccb); 4369 xpt_path_unlock(xpt_periph->path); 4370 } 4371 4372 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4373 xpt_release_devq(path, 1, TRUE); 4374 else 4375 xpt_release_simq(path->bus->sim, TRUE); 4376 if (ccb->casync.async_arg_size > 0) 4377 free(async_arg, M_CAMXPT); 4378 xpt_free_path(path); 4379 xpt_free_ccb(ccb); 4380 } 4381 4382 static void 4383 xpt_async_bcast(struct async_list *async_head, 4384 u_int32_t async_code, 4385 struct cam_path *path, void *async_arg) 4386 { 4387 struct async_node *cur_entry; 4388 struct mtx *mtx; 4389 4390 cur_entry = SLIST_FIRST(async_head); 4391 while (cur_entry != NULL) { 4392 struct async_node *next_entry; 4393 /* 4394 * Grab the next list entry before we call the current 4395 * entry's callback. This is because the callback function 4396 * can delete its async callback entry. 4397 */ 4398 next_entry = SLIST_NEXT(cur_entry, links); 4399 if ((cur_entry->event_enable & async_code) != 0) { 4400 mtx = cur_entry->event_lock ? 4401 path->device->sim->mtx : NULL; 4402 if (mtx) 4403 mtx_lock(mtx); 4404 cur_entry->callback(cur_entry->callback_arg, 4405 async_code, path, 4406 async_arg); 4407 if (mtx) 4408 mtx_unlock(mtx); 4409 } 4410 cur_entry = next_entry; 4411 } 4412 } 4413 4414 void 4415 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4416 { 4417 union ccb *ccb; 4418 int size; 4419 4420 ccb = xpt_alloc_ccb_nowait(); 4421 if (ccb == NULL) { 4422 xpt_print(path, "Can't allocate CCB to send %s\n", 4423 xpt_async_string(async_code)); 4424 return; 4425 } 4426 4427 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4428 xpt_print(path, "Can't allocate path to send %s\n", 4429 xpt_async_string(async_code)); 4430 xpt_free_ccb(ccb); 4431 return; 4432 } 4433 ccb->ccb_h.path->periph = NULL; 4434 ccb->ccb_h.func_code = XPT_ASYNC; 4435 ccb->ccb_h.cbfcnp = xpt_async_process; 4436 ccb->ccb_h.flags |= CAM_UNLOCKED; 4437 ccb->casync.async_code = async_code; 4438 ccb->casync.async_arg_size = 0; 4439 size = xpt_async_size(async_code); 4440 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 4441 ("xpt_async: func %#x %s aync_code %d %s\n", 4442 ccb->ccb_h.func_code, 4443 xpt_action_name(ccb->ccb_h.func_code), 4444 async_code, 4445 xpt_async_string(async_code))); 4446 if (size > 0 && async_arg != NULL) { 4447 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4448 if (ccb->casync.async_arg_ptr == NULL) { 4449 xpt_print(path, "Can't allocate argument to send %s\n", 4450 xpt_async_string(async_code)); 4451 xpt_free_path(ccb->ccb_h.path); 4452 xpt_free_ccb(ccb); 4453 return; 4454 } 4455 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4456 ccb->casync.async_arg_size = size; 4457 } else if (size < 0) { 4458 ccb->casync.async_arg_ptr = async_arg; 4459 ccb->casync.async_arg_size = size; 4460 } 4461 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4462 xpt_freeze_devq(path, 1); 4463 else 4464 xpt_freeze_simq(path->bus->sim, 1); 4465 xpt_done(ccb); 4466 } 4467 4468 static void 4469 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4470 struct cam_et *target, struct cam_ed *device, 4471 void *async_arg) 4472 { 4473 4474 /* 4475 * We only need to handle events for real devices. 4476 */ 4477 if (target->target_id == CAM_TARGET_WILDCARD 4478 || device->lun_id == CAM_LUN_WILDCARD) 4479 return; 4480 4481 printf("%s called\n", __func__); 4482 } 4483 4484 static uint32_t 4485 xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4486 { 4487 struct cam_devq *devq; 4488 uint32_t freeze; 4489 4490 devq = dev->sim->devq; 4491 mtx_assert(&devq->send_mtx, MA_OWNED); 4492 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4493 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4494 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4495 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4496 /* Remove frozen device from sendq. */ 4497 if (device_is_queued(dev)) 4498 camq_remove(&devq->send_queue, dev->devq_entry.index); 4499 return (freeze); 4500 } 4501 4502 u_int32_t 4503 xpt_freeze_devq(struct cam_path *path, u_int count) 4504 { 4505 struct cam_ed *dev = path->device; 4506 struct cam_devq *devq; 4507 uint32_t freeze; 4508 4509 devq = dev->sim->devq; 4510 mtx_lock(&devq->send_mtx); 4511 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4512 freeze = xpt_freeze_devq_device(dev, count); 4513 mtx_unlock(&devq->send_mtx); 4514 return (freeze); 4515 } 4516 4517 u_int32_t 4518 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4519 { 4520 struct cam_devq *devq; 4521 uint32_t freeze; 4522 4523 devq = sim->devq; 4524 mtx_lock(&devq->send_mtx); 4525 freeze = (devq->send_queue.qfrozen_cnt += count); 4526 mtx_unlock(&devq->send_mtx); 4527 return (freeze); 4528 } 4529 4530 static void 4531 xpt_release_devq_timeout(void *arg) 4532 { 4533 struct cam_ed *dev; 4534 struct cam_devq *devq; 4535 4536 dev = (struct cam_ed *)arg; 4537 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4538 devq = dev->sim->devq; 4539 mtx_assert(&devq->send_mtx, MA_OWNED); 4540 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4541 xpt_run_devq(devq); 4542 } 4543 4544 void 4545 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4546 { 4547 struct cam_ed *dev; 4548 struct cam_devq *devq; 4549 4550 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4551 count, run_queue)); 4552 dev = path->device; 4553 devq = dev->sim->devq; 4554 mtx_lock(&devq->send_mtx); 4555 if (xpt_release_devq_device(dev, count, run_queue)) 4556 xpt_run_devq(dev->sim->devq); 4557 mtx_unlock(&devq->send_mtx); 4558 } 4559 4560 static int 4561 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4562 { 4563 4564 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4565 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4566 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4567 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4568 if (count > dev->ccbq.queue.qfrozen_cnt) { 4569 #ifdef INVARIANTS 4570 printf("xpt_release_devq(): requested %u > present %u\n", 4571 count, dev->ccbq.queue.qfrozen_cnt); 4572 #endif 4573 count = dev->ccbq.queue.qfrozen_cnt; 4574 } 4575 dev->ccbq.queue.qfrozen_cnt -= count; 4576 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4577 /* 4578 * No longer need to wait for a successful 4579 * command completion. 4580 */ 4581 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4582 /* 4583 * Remove any timeouts that might be scheduled 4584 * to release this queue. 4585 */ 4586 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4587 callout_stop(&dev->callout); 4588 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4589 } 4590 /* 4591 * Now that we are unfrozen schedule the 4592 * device so any pending transactions are 4593 * run. 4594 */ 4595 xpt_schedule_devq(dev->sim->devq, dev); 4596 } else 4597 run_queue = 0; 4598 return (run_queue); 4599 } 4600 4601 void 4602 xpt_release_simq(struct cam_sim *sim, int run_queue) 4603 { 4604 struct cam_devq *devq; 4605 4606 devq = sim->devq; 4607 mtx_lock(&devq->send_mtx); 4608 if (devq->send_queue.qfrozen_cnt <= 0) { 4609 #ifdef INVARIANTS 4610 printf("xpt_release_simq: requested 1 > present %u\n", 4611 devq->send_queue.qfrozen_cnt); 4612 #endif 4613 } else 4614 devq->send_queue.qfrozen_cnt--; 4615 if (devq->send_queue.qfrozen_cnt == 0) { 4616 /* 4617 * If there is a timeout scheduled to release this 4618 * sim queue, remove it. The queue frozen count is 4619 * already at 0. 4620 */ 4621 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4622 callout_stop(&sim->callout); 4623 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4624 } 4625 if (run_queue) { 4626 /* 4627 * Now that we are unfrozen run the send queue. 4628 */ 4629 xpt_run_devq(sim->devq); 4630 } 4631 } 4632 mtx_unlock(&devq->send_mtx); 4633 } 4634 4635 /* 4636 * XXX Appears to be unused. 4637 */ 4638 static void 4639 xpt_release_simq_timeout(void *arg) 4640 { 4641 struct cam_sim *sim; 4642 4643 sim = (struct cam_sim *)arg; 4644 xpt_release_simq(sim, /* run_queue */ TRUE); 4645 } 4646 4647 void 4648 xpt_done(union ccb *done_ccb) 4649 { 4650 struct cam_doneq *queue; 4651 int run, hash; 4652 4653 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 4654 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO && 4655 done_ccb->csio.bio != NULL) 4656 biotrack(done_ccb->csio.bio, __func__); 4657 #endif 4658 4659 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4660 ("xpt_done: func= %#x %s status %#x\n", 4661 done_ccb->ccb_h.func_code, 4662 xpt_action_name(done_ccb->ccb_h.func_code), 4663 done_ccb->ccb_h.status)); 4664 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4665 return; 4666 4667 /* Store the time the ccb was in the sim */ 4668 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); 4669 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4670 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4671 queue = &cam_doneqs[hash]; 4672 mtx_lock(&queue->cam_doneq_mtx); 4673 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4674 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4675 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4676 mtx_unlock(&queue->cam_doneq_mtx); 4677 if (run) 4678 wakeup(&queue->cam_doneq); 4679 } 4680 4681 void 4682 xpt_done_direct(union ccb *done_ccb) 4683 { 4684 4685 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4686 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status)); 4687 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4688 return; 4689 4690 /* Store the time the ccb was in the sim */ 4691 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data); 4692 xpt_done_process(&done_ccb->ccb_h); 4693 } 4694 4695 union ccb * 4696 xpt_alloc_ccb() 4697 { 4698 union ccb *new_ccb; 4699 4700 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4701 return (new_ccb); 4702 } 4703 4704 union ccb * 4705 xpt_alloc_ccb_nowait() 4706 { 4707 union ccb *new_ccb; 4708 4709 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4710 return (new_ccb); 4711 } 4712 4713 void 4714 xpt_free_ccb(union ccb *free_ccb) 4715 { 4716 free(free_ccb, M_CAMCCB); 4717 } 4718 4719 4720 4721 /* Private XPT functions */ 4722 4723 /* 4724 * Get a CAM control block for the caller. Charge the structure to the device 4725 * referenced by the path. If we don't have sufficient resources to allocate 4726 * more ccbs, we return NULL. 4727 */ 4728 static union ccb * 4729 xpt_get_ccb_nowait(struct cam_periph *periph) 4730 { 4731 union ccb *new_ccb; 4732 4733 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4734 if (new_ccb == NULL) 4735 return (NULL); 4736 periph->periph_allocated++; 4737 cam_ccbq_take_opening(&periph->path->device->ccbq); 4738 return (new_ccb); 4739 } 4740 4741 static union ccb * 4742 xpt_get_ccb(struct cam_periph *periph) 4743 { 4744 union ccb *new_ccb; 4745 4746 cam_periph_unlock(periph); 4747 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4748 cam_periph_lock(periph); 4749 periph->periph_allocated++; 4750 cam_ccbq_take_opening(&periph->path->device->ccbq); 4751 return (new_ccb); 4752 } 4753 4754 union ccb * 4755 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4756 { 4757 struct ccb_hdr *ccb_h; 4758 4759 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4760 cam_periph_assert(periph, MA_OWNED); 4761 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4762 ccb_h->pinfo.priority != priority) { 4763 if (priority < periph->immediate_priority) { 4764 periph->immediate_priority = priority; 4765 xpt_run_allocq(periph, 0); 4766 } else 4767 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4768 "cgticb", 0); 4769 } 4770 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4771 return ((union ccb *)ccb_h); 4772 } 4773 4774 static void 4775 xpt_acquire_bus(struct cam_eb *bus) 4776 { 4777 4778 xpt_lock_buses(); 4779 bus->refcount++; 4780 xpt_unlock_buses(); 4781 } 4782 4783 static void 4784 xpt_release_bus(struct cam_eb *bus) 4785 { 4786 4787 xpt_lock_buses(); 4788 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4789 if (--bus->refcount > 0) { 4790 xpt_unlock_buses(); 4791 return; 4792 } 4793 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4794 xsoftc.bus_generation++; 4795 xpt_unlock_buses(); 4796 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4797 ("destroying bus, but target list is not empty")); 4798 cam_sim_release(bus->sim); 4799 mtx_destroy(&bus->eb_mtx); 4800 free(bus, M_CAMXPT); 4801 } 4802 4803 static struct cam_et * 4804 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4805 { 4806 struct cam_et *cur_target, *target; 4807 4808 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4809 mtx_assert(&bus->eb_mtx, MA_OWNED); 4810 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4811 M_NOWAIT|M_ZERO); 4812 if (target == NULL) 4813 return (NULL); 4814 4815 TAILQ_INIT(&target->ed_entries); 4816 target->bus = bus; 4817 target->target_id = target_id; 4818 target->refcount = 1; 4819 target->generation = 0; 4820 target->luns = NULL; 4821 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4822 timevalclear(&target->last_reset); 4823 /* 4824 * Hold a reference to our parent bus so it 4825 * will not go away before we do. 4826 */ 4827 bus->refcount++; 4828 4829 /* Insertion sort into our bus's target list */ 4830 cur_target = TAILQ_FIRST(&bus->et_entries); 4831 while (cur_target != NULL && cur_target->target_id < target_id) 4832 cur_target = TAILQ_NEXT(cur_target, links); 4833 if (cur_target != NULL) { 4834 TAILQ_INSERT_BEFORE(cur_target, target, links); 4835 } else { 4836 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4837 } 4838 bus->generation++; 4839 return (target); 4840 } 4841 4842 static void 4843 xpt_acquire_target(struct cam_et *target) 4844 { 4845 struct cam_eb *bus = target->bus; 4846 4847 mtx_lock(&bus->eb_mtx); 4848 target->refcount++; 4849 mtx_unlock(&bus->eb_mtx); 4850 } 4851 4852 static void 4853 xpt_release_target(struct cam_et *target) 4854 { 4855 struct cam_eb *bus = target->bus; 4856 4857 mtx_lock(&bus->eb_mtx); 4858 if (--target->refcount > 0) { 4859 mtx_unlock(&bus->eb_mtx); 4860 return; 4861 } 4862 TAILQ_REMOVE(&bus->et_entries, target, links); 4863 bus->generation++; 4864 mtx_unlock(&bus->eb_mtx); 4865 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4866 ("destroying target, but device list is not empty")); 4867 xpt_release_bus(bus); 4868 mtx_destroy(&target->luns_mtx); 4869 if (target->luns) 4870 free(target->luns, M_CAMXPT); 4871 free(target, M_CAMXPT); 4872 } 4873 4874 static struct cam_ed * 4875 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4876 lun_id_t lun_id) 4877 { 4878 struct cam_ed *device; 4879 4880 device = xpt_alloc_device(bus, target, lun_id); 4881 if (device == NULL) 4882 return (NULL); 4883 4884 device->mintags = 1; 4885 device->maxtags = 1; 4886 return (device); 4887 } 4888 4889 static void 4890 xpt_destroy_device(void *context, int pending) 4891 { 4892 struct cam_ed *device = context; 4893 4894 mtx_lock(&device->device_mtx); 4895 mtx_destroy(&device->device_mtx); 4896 free(device, M_CAMDEV); 4897 } 4898 4899 struct cam_ed * 4900 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4901 { 4902 struct cam_ed *cur_device, *device; 4903 struct cam_devq *devq; 4904 cam_status status; 4905 4906 mtx_assert(&bus->eb_mtx, MA_OWNED); 4907 /* Make space for us in the device queue on our bus */ 4908 devq = bus->sim->devq; 4909 mtx_lock(&devq->send_mtx); 4910 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4911 mtx_unlock(&devq->send_mtx); 4912 if (status != CAM_REQ_CMP) 4913 return (NULL); 4914 4915 device = (struct cam_ed *)malloc(sizeof(*device), 4916 M_CAMDEV, M_NOWAIT|M_ZERO); 4917 if (device == NULL) 4918 return (NULL); 4919 4920 cam_init_pinfo(&device->devq_entry); 4921 device->target = target; 4922 device->lun_id = lun_id; 4923 device->sim = bus->sim; 4924 if (cam_ccbq_init(&device->ccbq, 4925 bus->sim->max_dev_openings) != 0) { 4926 free(device, M_CAMDEV); 4927 return (NULL); 4928 } 4929 SLIST_INIT(&device->asyncs); 4930 SLIST_INIT(&device->periphs); 4931 device->generation = 0; 4932 device->flags = CAM_DEV_UNCONFIGURED; 4933 device->tag_delay_count = 0; 4934 device->tag_saved_openings = 0; 4935 device->refcount = 1; 4936 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4937 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4938 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4939 /* 4940 * Hold a reference to our parent bus so it 4941 * will not go away before we do. 4942 */ 4943 target->refcount++; 4944 4945 cur_device = TAILQ_FIRST(&target->ed_entries); 4946 while (cur_device != NULL && cur_device->lun_id < lun_id) 4947 cur_device = TAILQ_NEXT(cur_device, links); 4948 if (cur_device != NULL) 4949 TAILQ_INSERT_BEFORE(cur_device, device, links); 4950 else 4951 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4952 target->generation++; 4953 return (device); 4954 } 4955 4956 void 4957 xpt_acquire_device(struct cam_ed *device) 4958 { 4959 struct cam_eb *bus = device->target->bus; 4960 4961 mtx_lock(&bus->eb_mtx); 4962 device->refcount++; 4963 mtx_unlock(&bus->eb_mtx); 4964 } 4965 4966 void 4967 xpt_release_device(struct cam_ed *device) 4968 { 4969 struct cam_eb *bus = device->target->bus; 4970 struct cam_devq *devq; 4971 4972 mtx_lock(&bus->eb_mtx); 4973 if (--device->refcount > 0) { 4974 mtx_unlock(&bus->eb_mtx); 4975 return; 4976 } 4977 4978 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4979 device->target->generation++; 4980 mtx_unlock(&bus->eb_mtx); 4981 4982 /* Release our slot in the devq */ 4983 devq = bus->sim->devq; 4984 mtx_lock(&devq->send_mtx); 4985 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4986 mtx_unlock(&devq->send_mtx); 4987 4988 KASSERT(SLIST_EMPTY(&device->periphs), 4989 ("destroying device, but periphs list is not empty")); 4990 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4991 ("destroying device while still queued for ccbs")); 4992 4993 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4994 callout_stop(&device->callout); 4995 4996 xpt_release_target(device->target); 4997 4998 cam_ccbq_fini(&device->ccbq); 4999 /* 5000 * Free allocated memory. free(9) does nothing if the 5001 * supplied pointer is NULL, so it is safe to call without 5002 * checking. 5003 */ 5004 free(device->supported_vpds, M_CAMXPT); 5005 free(device->device_id, M_CAMXPT); 5006 free(device->ext_inq, M_CAMXPT); 5007 free(device->physpath, M_CAMXPT); 5008 free(device->rcap_buf, M_CAMXPT); 5009 free(device->serial_num, M_CAMXPT); 5010 free(device->nvme_data, M_CAMXPT); 5011 free(device->nvme_cdata, M_CAMXPT); 5012 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 5013 } 5014 5015 u_int32_t 5016 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5017 { 5018 int result; 5019 struct cam_ed *dev; 5020 5021 dev = path->device; 5022 mtx_lock(&dev->sim->devq->send_mtx); 5023 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5024 mtx_unlock(&dev->sim->devq->send_mtx); 5025 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5026 || (dev->inq_flags & SID_CmdQue) != 0) 5027 dev->tag_saved_openings = newopenings; 5028 return (result); 5029 } 5030 5031 static struct cam_eb * 5032 xpt_find_bus(path_id_t path_id) 5033 { 5034 struct cam_eb *bus; 5035 5036 xpt_lock_buses(); 5037 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 5038 bus != NULL; 5039 bus = TAILQ_NEXT(bus, links)) { 5040 if (bus->path_id == path_id) { 5041 bus->refcount++; 5042 break; 5043 } 5044 } 5045 xpt_unlock_buses(); 5046 return (bus); 5047 } 5048 5049 static struct cam_et * 5050 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5051 { 5052 struct cam_et *target; 5053 5054 mtx_assert(&bus->eb_mtx, MA_OWNED); 5055 for (target = TAILQ_FIRST(&bus->et_entries); 5056 target != NULL; 5057 target = TAILQ_NEXT(target, links)) { 5058 if (target->target_id == target_id) { 5059 target->refcount++; 5060 break; 5061 } 5062 } 5063 return (target); 5064 } 5065 5066 static struct cam_ed * 5067 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5068 { 5069 struct cam_ed *device; 5070 5071 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 5072 for (device = TAILQ_FIRST(&target->ed_entries); 5073 device != NULL; 5074 device = TAILQ_NEXT(device, links)) { 5075 if (device->lun_id == lun_id) { 5076 device->refcount++; 5077 break; 5078 } 5079 } 5080 return (device); 5081 } 5082 5083 void 5084 xpt_start_tags(struct cam_path *path) 5085 { 5086 struct ccb_relsim crs; 5087 struct cam_ed *device; 5088 struct cam_sim *sim; 5089 int newopenings; 5090 5091 device = path->device; 5092 sim = path->bus->sim; 5093 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5094 xpt_freeze_devq(path, /*count*/1); 5095 device->inq_flags |= SID_CmdQue; 5096 if (device->tag_saved_openings != 0) 5097 newopenings = device->tag_saved_openings; 5098 else 5099 newopenings = min(device->maxtags, 5100 sim->max_tagged_dev_openings); 5101 xpt_dev_ccbq_resize(path, newopenings); 5102 xpt_async(AC_GETDEV_CHANGED, path, NULL); 5103 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 5104 crs.ccb_h.func_code = XPT_REL_SIMQ; 5105 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5106 crs.openings 5107 = crs.release_timeout 5108 = crs.qfrozen_cnt 5109 = 0; 5110 xpt_action((union ccb *)&crs); 5111 } 5112 5113 void 5114 xpt_stop_tags(struct cam_path *path) 5115 { 5116 struct ccb_relsim crs; 5117 struct cam_ed *device; 5118 struct cam_sim *sim; 5119 5120 device = path->device; 5121 sim = path->bus->sim; 5122 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5123 device->tag_delay_count = 0; 5124 xpt_freeze_devq(path, /*count*/1); 5125 device->inq_flags &= ~SID_CmdQue; 5126 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 5127 xpt_async(AC_GETDEV_CHANGED, path, NULL); 5128 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 5129 crs.ccb_h.func_code = XPT_REL_SIMQ; 5130 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5131 crs.openings 5132 = crs.release_timeout 5133 = crs.qfrozen_cnt 5134 = 0; 5135 xpt_action((union ccb *)&crs); 5136 } 5137 5138 /* 5139 * Assume all possible buses are detected by this time, so allow boot 5140 * as soon as they all are scanned. 5141 */ 5142 static void 5143 xpt_boot_delay(void *arg) 5144 { 5145 5146 xpt_release_boot(); 5147 } 5148 5149 /* 5150 * Now that all config hooks have completed, start boot_delay timer, 5151 * waiting for possibly still undetected buses (USB) to appear. 5152 */ 5153 static void 5154 xpt_ch_done(void *arg) 5155 { 5156 5157 callout_init(&xsoftc.boot_callout, 1); 5158 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0, 5159 xpt_boot_delay, NULL, 0); 5160 } 5161 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL); 5162 5163 /* 5164 * Now that interrupts are enabled, go find our devices 5165 */ 5166 static void 5167 xpt_config(void *arg) 5168 { 5169 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 5170 printf("xpt_config: failed to create taskqueue thread.\n"); 5171 5172 /* Setup debugging path */ 5173 if (cam_dflags != CAM_DEBUG_NONE) { 5174 if (xpt_create_path(&cam_dpath, NULL, 5175 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 5176 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 5177 printf("xpt_config: xpt_create_path() failed for debug" 5178 " target %d:%d:%d, debugging disabled\n", 5179 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 5180 cam_dflags = CAM_DEBUG_NONE; 5181 } 5182 } else 5183 cam_dpath = NULL; 5184 5185 periphdriver_init(1); 5186 xpt_hold_boot(); 5187 5188 /* Fire up rescan thread. */ 5189 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 5190 "cam", "scanner")) { 5191 printf("xpt_config: failed to create rescan thread.\n"); 5192 } 5193 } 5194 5195 void 5196 xpt_hold_boot_locked(void) 5197 { 5198 5199 if (xsoftc.buses_to_config++ == 0) 5200 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount); 5201 } 5202 5203 void 5204 xpt_hold_boot(void) 5205 { 5206 5207 xpt_lock_buses(); 5208 xpt_hold_boot_locked(); 5209 xpt_unlock_buses(); 5210 } 5211 5212 void 5213 xpt_release_boot(void) 5214 { 5215 5216 xpt_lock_buses(); 5217 if (--xsoftc.buses_to_config == 0) { 5218 if (xsoftc.buses_config_done == 0) { 5219 xsoftc.buses_config_done = 1; 5220 xsoftc.buses_to_config++; 5221 TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task, 5222 NULL); 5223 taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task); 5224 } else 5225 root_mount_rel(&xsoftc.xpt_rootmount); 5226 } 5227 xpt_unlock_buses(); 5228 } 5229 5230 /* 5231 * If the given device only has one peripheral attached to it, and if that 5232 * peripheral is the passthrough driver, announce it. This insures that the 5233 * user sees some sort of announcement for every peripheral in their system. 5234 */ 5235 static int 5236 xptpassannouncefunc(struct cam_ed *device, void *arg) 5237 { 5238 struct cam_periph *periph; 5239 int i; 5240 5241 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5242 periph = SLIST_NEXT(periph, periph_links), i++); 5243 5244 periph = SLIST_FIRST(&device->periphs); 5245 if ((i == 1) 5246 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5247 xpt_announce_periph(periph, NULL); 5248 5249 return(1); 5250 } 5251 5252 static void 5253 xpt_finishconfig_task(void *context, int pending) 5254 { 5255 5256 periphdriver_init(2); 5257 /* 5258 * Check for devices with no "standard" peripheral driver 5259 * attached. For any devices like that, announce the 5260 * passthrough driver so the user will see something. 5261 */ 5262 if (!bootverbose) 5263 xpt_for_all_devices(xptpassannouncefunc, NULL); 5264 5265 xpt_release_boot(); 5266 } 5267 5268 cam_status 5269 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5270 struct cam_path *path) 5271 { 5272 struct ccb_setasync csa; 5273 cam_status status; 5274 int xptpath = 0; 5275 5276 if (path == NULL) { 5277 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5278 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5279 if (status != CAM_REQ_CMP) 5280 return (status); 5281 xpt_path_lock(path); 5282 xptpath = 1; 5283 } 5284 5285 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5286 csa.ccb_h.func_code = XPT_SASYNC_CB; 5287 csa.event_enable = event; 5288 csa.callback = cbfunc; 5289 csa.callback_arg = cbarg; 5290 xpt_action((union ccb *)&csa); 5291 status = csa.ccb_h.status; 5292 5293 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE, 5294 ("xpt_register_async: func %p\n", cbfunc)); 5295 5296 if (xptpath) { 5297 xpt_path_unlock(path); 5298 xpt_free_path(path); 5299 } 5300 5301 if ((status == CAM_REQ_CMP) && 5302 (csa.event_enable & AC_FOUND_DEVICE)) { 5303 /* 5304 * Get this peripheral up to date with all 5305 * the currently existing devices. 5306 */ 5307 xpt_for_all_devices(xptsetasyncfunc, &csa); 5308 } 5309 if ((status == CAM_REQ_CMP) && 5310 (csa.event_enable & AC_PATH_REGISTERED)) { 5311 /* 5312 * Get this peripheral up to date with all 5313 * the currently existing buses. 5314 */ 5315 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5316 } 5317 5318 return (status); 5319 } 5320 5321 static void 5322 xptaction(struct cam_sim *sim, union ccb *work_ccb) 5323 { 5324 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5325 5326 switch (work_ccb->ccb_h.func_code) { 5327 /* Common cases first */ 5328 case XPT_PATH_INQ: /* Path routing inquiry */ 5329 { 5330 struct ccb_pathinq *cpi; 5331 5332 cpi = &work_ccb->cpi; 5333 cpi->version_num = 1; /* XXX??? */ 5334 cpi->hba_inquiry = 0; 5335 cpi->target_sprt = 0; 5336 cpi->hba_misc = 0; 5337 cpi->hba_eng_cnt = 0; 5338 cpi->max_target = 0; 5339 cpi->max_lun = 0; 5340 cpi->initiator_id = 0; 5341 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5342 strlcpy(cpi->hba_vid, "", HBA_IDLEN); 5343 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5344 cpi->unit_number = sim->unit_number; 5345 cpi->bus_id = sim->bus_id; 5346 cpi->base_transfer_speed = 0; 5347 cpi->protocol = PROTO_UNSPECIFIED; 5348 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5349 cpi->transport = XPORT_UNSPECIFIED; 5350 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5351 cpi->ccb_h.status = CAM_REQ_CMP; 5352 xpt_done(work_ccb); 5353 break; 5354 } 5355 default: 5356 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5357 xpt_done(work_ccb); 5358 break; 5359 } 5360 } 5361 5362 /* 5363 * The xpt as a "controller" has no interrupt sources, so polling 5364 * is a no-op. 5365 */ 5366 static void 5367 xptpoll(struct cam_sim *sim) 5368 { 5369 } 5370 5371 void 5372 xpt_lock_buses(void) 5373 { 5374 mtx_lock(&xsoftc.xpt_topo_lock); 5375 } 5376 5377 void 5378 xpt_unlock_buses(void) 5379 { 5380 mtx_unlock(&xsoftc.xpt_topo_lock); 5381 } 5382 5383 struct mtx * 5384 xpt_path_mtx(struct cam_path *path) 5385 { 5386 5387 return (&path->device->device_mtx); 5388 } 5389 5390 static void 5391 xpt_done_process(struct ccb_hdr *ccb_h) 5392 { 5393 struct cam_sim *sim = NULL; 5394 struct cam_devq *devq = NULL; 5395 struct mtx *mtx = NULL; 5396 5397 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 5398 struct ccb_scsiio *csio; 5399 5400 if (ccb_h->func_code == XPT_SCSI_IO) { 5401 csio = &((union ccb *)ccb_h)->csio; 5402 if (csio->bio != NULL) 5403 biotrack(csio->bio, __func__); 5404 } 5405 #endif 5406 5407 if (ccb_h->flags & CAM_HIGH_POWER) { 5408 struct highpowerlist *hphead; 5409 struct cam_ed *device; 5410 5411 mtx_lock(&xsoftc.xpt_highpower_lock); 5412 hphead = &xsoftc.highpowerq; 5413 5414 device = STAILQ_FIRST(hphead); 5415 5416 /* 5417 * Increment the count since this command is done. 5418 */ 5419 xsoftc.num_highpower++; 5420 5421 /* 5422 * Any high powered commands queued up? 5423 */ 5424 if (device != NULL) { 5425 5426 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5427 mtx_unlock(&xsoftc.xpt_highpower_lock); 5428 5429 mtx_lock(&device->sim->devq->send_mtx); 5430 xpt_release_devq_device(device, 5431 /*count*/1, /*runqueue*/TRUE); 5432 mtx_unlock(&device->sim->devq->send_mtx); 5433 } else 5434 mtx_unlock(&xsoftc.xpt_highpower_lock); 5435 } 5436 5437 /* 5438 * Insulate against a race where the periph is destroyed but CCBs are 5439 * still not all processed. This shouldn't happen, but allows us better 5440 * bug diagnostic when it does. 5441 */ 5442 if (ccb_h->path->bus) 5443 sim = ccb_h->path->bus->sim; 5444 5445 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5446 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request")); 5447 xpt_release_simq(sim, /*run_queue*/FALSE); 5448 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5449 } 5450 5451 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5452 && (ccb_h->status & CAM_DEV_QFRZN)) { 5453 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5454 ccb_h->status &= ~CAM_DEV_QFRZN; 5455 } 5456 5457 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5458 struct cam_ed *dev = ccb_h->path->device; 5459 5460 if (sim) 5461 devq = sim->devq; 5462 KASSERT(devq, ("Periph disappeared with request pending.")); 5463 5464 mtx_lock(&devq->send_mtx); 5465 devq->send_active--; 5466 devq->send_openings++; 5467 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5468 5469 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5470 && (dev->ccbq.dev_active == 0))) { 5471 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5472 xpt_release_devq_device(dev, /*count*/1, 5473 /*run_queue*/FALSE); 5474 } 5475 5476 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5477 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5478 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5479 xpt_release_devq_device(dev, /*count*/1, 5480 /*run_queue*/FALSE); 5481 } 5482 5483 if (!device_is_queued(dev)) 5484 (void)xpt_schedule_devq(devq, dev); 5485 xpt_run_devq(devq); 5486 mtx_unlock(&devq->send_mtx); 5487 5488 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5489 mtx = xpt_path_mtx(ccb_h->path); 5490 mtx_lock(mtx); 5491 5492 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5493 && (--dev->tag_delay_count == 0)) 5494 xpt_start_tags(ccb_h->path); 5495 } 5496 } 5497 5498 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5499 if (mtx == NULL) { 5500 mtx = xpt_path_mtx(ccb_h->path); 5501 mtx_lock(mtx); 5502 } 5503 } else { 5504 if (mtx != NULL) { 5505 mtx_unlock(mtx); 5506 mtx = NULL; 5507 } 5508 } 5509 5510 /* Call the peripheral driver's callback */ 5511 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5512 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5513 if (mtx != NULL) 5514 mtx_unlock(mtx); 5515 } 5516 5517 void 5518 xpt_done_td(void *arg) 5519 { 5520 struct cam_doneq *queue = arg; 5521 struct ccb_hdr *ccb_h; 5522 STAILQ_HEAD(, ccb_hdr) doneq; 5523 5524 STAILQ_INIT(&doneq); 5525 mtx_lock(&queue->cam_doneq_mtx); 5526 while (1) { 5527 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5528 queue->cam_doneq_sleep = 1; 5529 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5530 PRIBIO, "-", 0); 5531 queue->cam_doneq_sleep = 0; 5532 } 5533 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5534 mtx_unlock(&queue->cam_doneq_mtx); 5535 5536 THREAD_NO_SLEEPING(); 5537 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5538 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5539 xpt_done_process(ccb_h); 5540 } 5541 THREAD_SLEEPING_OK(); 5542 5543 mtx_lock(&queue->cam_doneq_mtx); 5544 } 5545 } 5546 5547 static void 5548 camisr_runqueue(void) 5549 { 5550 struct ccb_hdr *ccb_h; 5551 struct cam_doneq *queue; 5552 int i; 5553 5554 /* Process global queues. */ 5555 for (i = 0; i < cam_num_doneqs; i++) { 5556 queue = &cam_doneqs[i]; 5557 mtx_lock(&queue->cam_doneq_mtx); 5558 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5559 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5560 mtx_unlock(&queue->cam_doneq_mtx); 5561 xpt_done_process(ccb_h); 5562 mtx_lock(&queue->cam_doneq_mtx); 5563 } 5564 mtx_unlock(&queue->cam_doneq_mtx); 5565 } 5566 } 5567 5568 struct kv 5569 { 5570 uint32_t v; 5571 const char *name; 5572 }; 5573 5574 static struct kv map[] = { 5575 { XPT_NOOP, "XPT_NOOP" }, 5576 { XPT_SCSI_IO, "XPT_SCSI_IO" }, 5577 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" }, 5578 { XPT_GDEVLIST, "XPT_GDEVLIST" }, 5579 { XPT_PATH_INQ, "XPT_PATH_INQ" }, 5580 { XPT_REL_SIMQ, "XPT_REL_SIMQ" }, 5581 { XPT_SASYNC_CB, "XPT_SASYNC_CB" }, 5582 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" }, 5583 { XPT_SCAN_BUS, "XPT_SCAN_BUS" }, 5584 { XPT_DEV_MATCH, "XPT_DEV_MATCH" }, 5585 { XPT_DEBUG, "XPT_DEBUG" }, 5586 { XPT_PATH_STATS, "XPT_PATH_STATS" }, 5587 { XPT_GDEV_STATS, "XPT_GDEV_STATS" }, 5588 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" }, 5589 { XPT_ASYNC, "XPT_ASYNC" }, 5590 { XPT_ABORT, "XPT_ABORT" }, 5591 { XPT_RESET_BUS, "XPT_RESET_BUS" }, 5592 { XPT_RESET_DEV, "XPT_RESET_DEV" }, 5593 { XPT_TERM_IO, "XPT_TERM_IO" }, 5594 { XPT_SCAN_LUN, "XPT_SCAN_LUN" }, 5595 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" }, 5596 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" }, 5597 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" }, 5598 { XPT_ATA_IO, "XPT_ATA_IO" }, 5599 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" }, 5600 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" }, 5601 { XPT_NVME_IO, "XPT_NVME_IO" }, 5602 { XPT_MMC_IO, "XPT_MMC_IO" }, 5603 { XPT_SMP_IO, "XPT_SMP_IO" }, 5604 { XPT_SCAN_TGT, "XPT_SCAN_TGT" }, 5605 { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" }, 5606 { XPT_ENG_INQ, "XPT_ENG_INQ" }, 5607 { XPT_ENG_EXEC, "XPT_ENG_EXEC" }, 5608 { XPT_EN_LUN, "XPT_EN_LUN" }, 5609 { XPT_TARGET_IO, "XPT_TARGET_IO" }, 5610 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" }, 5611 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" }, 5612 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" }, 5613 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" }, 5614 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" }, 5615 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" }, 5616 { 0, 0 } 5617 }; 5618 5619 const char * 5620 xpt_action_name(uint32_t action) 5621 { 5622 static char buffer[32]; /* Only for unknown messages -- racy */ 5623 struct kv *walker = map; 5624 5625 while (walker->name != NULL) { 5626 if (walker->v == action) 5627 return (walker->name); 5628 walker++; 5629 } 5630 5631 snprintf(buffer, sizeof(buffer), "%#x", action); 5632 return (buffer); 5633 } 5634