1 /*- 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include "opt_printf.h" 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/bio.h> 37 #include <sys/bus.h> 38 #include <sys/systm.h> 39 #include <sys/types.h> 40 #include <sys/malloc.h> 41 #include <sys/kernel.h> 42 #include <sys/time.h> 43 #include <sys/conf.h> 44 #include <sys/fcntl.h> 45 #include <sys/interrupt.h> 46 #include <sys/proc.h> 47 #include <sys/sbuf.h> 48 #include <sys/smp.h> 49 #include <sys/taskqueue.h> 50 51 #include <sys/lock.h> 52 #include <sys/mutex.h> 53 #include <sys/sysctl.h> 54 #include <sys/kthread.h> 55 56 #include <cam/cam.h> 57 #include <cam/cam_ccb.h> 58 #include <cam/cam_periph.h> 59 #include <cam/cam_queue.h> 60 #include <cam/cam_sim.h> 61 #include <cam/cam_xpt.h> 62 #include <cam/cam_xpt_sim.h> 63 #include <cam/cam_xpt_periph.h> 64 #include <cam/cam_xpt_internal.h> 65 #include <cam/cam_debug.h> 66 #include <cam/cam_compat.h> 67 68 #include <cam/scsi/scsi_all.h> 69 #include <cam/scsi/scsi_message.h> 70 #include <cam/scsi/scsi_pass.h> 71 72 #include <machine/md_var.h> /* geometry translation */ 73 #include <machine/stdarg.h> /* for xpt_print below */ 74 75 #include "opt_cam.h" 76 77 /* Wild guess based on not wanting to grow the stack too much */ 78 #define XPT_PRINT_MAXLEN 512 79 #ifdef PRINTF_BUFR_SIZE 80 #define XPT_PRINT_LEN PRINTF_BUFR_SIZE 81 #else 82 #define XPT_PRINT_LEN 128 83 #endif 84 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large"); 85 86 /* 87 * This is the maximum number of high powered commands (e.g. start unit) 88 * that can be outstanding at a particular time. 89 */ 90 #ifndef CAM_MAX_HIGHPOWER 91 #define CAM_MAX_HIGHPOWER 4 92 #endif 93 94 /* Datastructures internal to the xpt layer */ 95 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 96 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices"); 97 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs"); 98 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths"); 99 100 /* Object for defering XPT actions to a taskqueue */ 101 struct xpt_task { 102 struct task task; 103 void *data1; 104 uintptr_t data2; 105 }; 106 107 struct xpt_softc { 108 uint32_t xpt_generation; 109 110 /* number of high powered commands that can go through right now */ 111 struct mtx xpt_highpower_lock; 112 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq; 113 int num_highpower; 114 115 /* queue for handling async rescan requests. */ 116 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 117 int buses_to_config; 118 int buses_config_done; 119 120 /* 121 * Registered buses 122 * 123 * N.B., "busses" is an archaic spelling of "buses". In new code 124 * "buses" is preferred. 125 */ 126 TAILQ_HEAD(,cam_eb) xpt_busses; 127 u_int bus_generation; 128 129 struct intr_config_hook *xpt_config_hook; 130 131 int boot_delay; 132 struct callout boot_callout; 133 134 struct mtx xpt_topo_lock; 135 struct mtx xpt_lock; 136 struct taskqueue *xpt_taskq; 137 }; 138 139 typedef enum { 140 DM_RET_COPY = 0x01, 141 DM_RET_FLAG_MASK = 0x0f, 142 DM_RET_NONE = 0x00, 143 DM_RET_STOP = 0x10, 144 DM_RET_DESCEND = 0x20, 145 DM_RET_ERROR = 0x30, 146 DM_RET_ACTION_MASK = 0xf0 147 } dev_match_ret; 148 149 typedef enum { 150 XPT_DEPTH_BUS, 151 XPT_DEPTH_TARGET, 152 XPT_DEPTH_DEVICE, 153 XPT_DEPTH_PERIPH 154 } xpt_traverse_depth; 155 156 struct xpt_traverse_config { 157 xpt_traverse_depth depth; 158 void *tr_func; 159 void *tr_arg; 160 }; 161 162 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 163 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 164 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 165 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 166 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 167 168 /* Transport layer configuration information */ 169 static struct xpt_softc xsoftc; 170 171 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF); 172 173 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN, 174 &xsoftc.boot_delay, 0, "Bus registration wait time"); 175 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD, 176 &xsoftc.xpt_generation, 0, "CAM peripheral generation count"); 177 178 struct cam_doneq { 179 struct mtx_padalign cam_doneq_mtx; 180 STAILQ_HEAD(, ccb_hdr) cam_doneq; 181 int cam_doneq_sleep; 182 }; 183 184 static struct cam_doneq cam_doneqs[MAXCPU]; 185 static int cam_num_doneqs; 186 static struct proc *cam_proc; 187 188 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN, 189 &cam_num_doneqs, 0, "Number of completion queues/threads"); 190 191 struct cam_periph *xpt_periph; 192 193 static periph_init_t xpt_periph_init; 194 195 static struct periph_driver xpt_driver = 196 { 197 xpt_periph_init, "xpt", 198 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0, 199 CAM_PERIPH_DRV_EARLY 200 }; 201 202 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 203 204 static d_open_t xptopen; 205 static d_close_t xptclose; 206 static d_ioctl_t xptioctl; 207 static d_ioctl_t xptdoioctl; 208 209 static struct cdevsw xpt_cdevsw = { 210 .d_version = D_VERSION, 211 .d_flags = 0, 212 .d_open = xptopen, 213 .d_close = xptclose, 214 .d_ioctl = xptioctl, 215 .d_name = "xpt", 216 }; 217 218 /* Storage for debugging datastructures */ 219 struct cam_path *cam_dpath; 220 u_int32_t cam_dflags = CAM_DEBUG_FLAGS; 221 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN, 222 &cam_dflags, 0, "Enabled debug flags"); 223 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY; 224 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN, 225 &cam_debug_delay, 0, "Delay in us after each debug message"); 226 227 /* Our boot-time initialization hook */ 228 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 229 230 static moduledata_t cam_moduledata = { 231 "cam", 232 cam_module_event_handler, 233 NULL 234 }; 235 236 static int xpt_init(void *); 237 238 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 239 MODULE_VERSION(cam, 1); 240 241 242 static void xpt_async_bcast(struct async_list *async_head, 243 u_int32_t async_code, 244 struct cam_path *path, 245 void *async_arg); 246 static path_id_t xptnextfreepathid(void); 247 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 248 static union ccb *xpt_get_ccb(struct cam_periph *periph); 249 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph); 250 static void xpt_run_allocq(struct cam_periph *periph, int sleep); 251 static void xpt_run_allocq_task(void *context, int pending); 252 static void xpt_run_devq(struct cam_devq *devq); 253 static timeout_t xpt_release_devq_timeout; 254 static void xpt_release_simq_timeout(void *arg) __unused; 255 static void xpt_acquire_bus(struct cam_eb *bus); 256 static void xpt_release_bus(struct cam_eb *bus); 257 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count); 258 static int xpt_release_devq_device(struct cam_ed *dev, u_int count, 259 int run_queue); 260 static struct cam_et* 261 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 262 static void xpt_acquire_target(struct cam_et *target); 263 static void xpt_release_target(struct cam_et *target); 264 static struct cam_eb* 265 xpt_find_bus(path_id_t path_id); 266 static struct cam_et* 267 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 268 static struct cam_ed* 269 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 270 static void xpt_config(void *arg); 271 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 272 u_int32_t new_priority); 273 static xpt_devicefunc_t xptpassannouncefunc; 274 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 275 static void xptpoll(struct cam_sim *sim); 276 static void camisr_runqueue(void); 277 static void xpt_done_process(struct ccb_hdr *ccb_h); 278 static void xpt_done_td(void *); 279 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 280 u_int num_patterns, struct cam_eb *bus); 281 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 282 u_int num_patterns, 283 struct cam_ed *device); 284 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 285 u_int num_patterns, 286 struct cam_periph *periph); 287 static xpt_busfunc_t xptedtbusfunc; 288 static xpt_targetfunc_t xptedttargetfunc; 289 static xpt_devicefunc_t xptedtdevicefunc; 290 static xpt_periphfunc_t xptedtperiphfunc; 291 static xpt_pdrvfunc_t xptplistpdrvfunc; 292 static xpt_periphfunc_t xptplistperiphfunc; 293 static int xptedtmatch(struct ccb_dev_match *cdm); 294 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 295 static int xptbustraverse(struct cam_eb *start_bus, 296 xpt_busfunc_t *tr_func, void *arg); 297 static int xpttargettraverse(struct cam_eb *bus, 298 struct cam_et *start_target, 299 xpt_targetfunc_t *tr_func, void *arg); 300 static int xptdevicetraverse(struct cam_et *target, 301 struct cam_ed *start_device, 302 xpt_devicefunc_t *tr_func, void *arg); 303 static int xptperiphtraverse(struct cam_ed *device, 304 struct cam_periph *start_periph, 305 xpt_periphfunc_t *tr_func, void *arg); 306 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 307 xpt_pdrvfunc_t *tr_func, void *arg); 308 static int xptpdperiphtraverse(struct periph_driver **pdrv, 309 struct cam_periph *start_periph, 310 xpt_periphfunc_t *tr_func, 311 void *arg); 312 static xpt_busfunc_t xptdefbusfunc; 313 static xpt_targetfunc_t xptdeftargetfunc; 314 static xpt_devicefunc_t xptdefdevicefunc; 315 static xpt_periphfunc_t xptdefperiphfunc; 316 static void xpt_finishconfig_task(void *context, int pending); 317 static void xpt_dev_async_default(u_int32_t async_code, 318 struct cam_eb *bus, 319 struct cam_et *target, 320 struct cam_ed *device, 321 void *async_arg); 322 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus, 323 struct cam_et *target, 324 lun_id_t lun_id); 325 static xpt_devicefunc_t xptsetasyncfunc; 326 static xpt_busfunc_t xptsetasyncbusfunc; 327 static cam_status xptregister(struct cam_periph *periph, 328 void *arg); 329 static const char * xpt_action_name(uint32_t action); 330 static __inline int device_is_queued(struct cam_ed *device); 331 332 static __inline int 333 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev) 334 { 335 int retval; 336 337 mtx_assert(&devq->send_mtx, MA_OWNED); 338 if ((dev->ccbq.queue.entries > 0) && 339 (dev->ccbq.dev_openings > 0) && 340 (dev->ccbq.queue.qfrozen_cnt == 0)) { 341 /* 342 * The priority of a device waiting for controller 343 * resources is that of the highest priority CCB 344 * enqueued. 345 */ 346 retval = 347 xpt_schedule_dev(&devq->send_queue, 348 &dev->devq_entry, 349 CAMQ_GET_PRIO(&dev->ccbq.queue)); 350 } else { 351 retval = 0; 352 } 353 return (retval); 354 } 355 356 static __inline int 357 device_is_queued(struct cam_ed *device) 358 { 359 return (device->devq_entry.index != CAM_UNQUEUED_INDEX); 360 } 361 362 static void 363 xpt_periph_init() 364 { 365 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 366 } 367 368 static int 369 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td) 370 { 371 372 /* 373 * Only allow read-write access. 374 */ 375 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 376 return(EPERM); 377 378 /* 379 * We don't allow nonblocking access. 380 */ 381 if ((flags & O_NONBLOCK) != 0) { 382 printf("%s: can't do nonblocking access\n", devtoname(dev)); 383 return(ENODEV); 384 } 385 386 return(0); 387 } 388 389 static int 390 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td) 391 { 392 393 return(0); 394 } 395 396 /* 397 * Don't automatically grab the xpt softc lock here even though this is going 398 * through the xpt device. The xpt device is really just a back door for 399 * accessing other devices and SIMs, so the right thing to do is to grab 400 * the appropriate SIM lock once the bus/SIM is located. 401 */ 402 static int 403 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 404 { 405 int error; 406 407 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) { 408 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl); 409 } 410 return (error); 411 } 412 413 static int 414 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 415 { 416 int error; 417 418 error = 0; 419 420 switch(cmd) { 421 /* 422 * For the transport layer CAMIOCOMMAND ioctl, we really only want 423 * to accept CCB types that don't quite make sense to send through a 424 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 425 * in the CAM spec. 426 */ 427 case CAMIOCOMMAND: { 428 union ccb *ccb; 429 union ccb *inccb; 430 struct cam_eb *bus; 431 432 inccb = (union ccb *)addr; 433 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 434 if (inccb->ccb_h.func_code == XPT_SCSI_IO) 435 inccb->csio.bio = NULL; 436 #endif 437 438 if (inccb->ccb_h.flags & CAM_UNLOCKED) 439 return (EINVAL); 440 441 bus = xpt_find_bus(inccb->ccb_h.path_id); 442 if (bus == NULL) 443 return (EINVAL); 444 445 switch (inccb->ccb_h.func_code) { 446 case XPT_SCAN_BUS: 447 case XPT_RESET_BUS: 448 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD || 449 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 450 xpt_release_bus(bus); 451 return (EINVAL); 452 } 453 break; 454 case XPT_SCAN_TGT: 455 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD || 456 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) { 457 xpt_release_bus(bus); 458 return (EINVAL); 459 } 460 break; 461 default: 462 break; 463 } 464 465 switch(inccb->ccb_h.func_code) { 466 case XPT_SCAN_BUS: 467 case XPT_RESET_BUS: 468 case XPT_PATH_INQ: 469 case XPT_ENG_INQ: 470 case XPT_SCAN_LUN: 471 case XPT_SCAN_TGT: 472 473 ccb = xpt_alloc_ccb(); 474 475 /* 476 * Create a path using the bus, target, and lun the 477 * user passed in. 478 */ 479 if (xpt_create_path(&ccb->ccb_h.path, NULL, 480 inccb->ccb_h.path_id, 481 inccb->ccb_h.target_id, 482 inccb->ccb_h.target_lun) != 483 CAM_REQ_CMP){ 484 error = EINVAL; 485 xpt_free_ccb(ccb); 486 break; 487 } 488 /* Ensure all of our fields are correct */ 489 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 490 inccb->ccb_h.pinfo.priority); 491 xpt_merge_ccb(ccb, inccb); 492 xpt_path_lock(ccb->ccb_h.path); 493 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 494 xpt_path_unlock(ccb->ccb_h.path); 495 bcopy(ccb, inccb, sizeof(union ccb)); 496 xpt_free_path(ccb->ccb_h.path); 497 xpt_free_ccb(ccb); 498 break; 499 500 case XPT_DEBUG: { 501 union ccb ccb; 502 503 /* 504 * This is an immediate CCB, so it's okay to 505 * allocate it on the stack. 506 */ 507 508 /* 509 * Create a path using the bus, target, and lun the 510 * user passed in. 511 */ 512 if (xpt_create_path(&ccb.ccb_h.path, NULL, 513 inccb->ccb_h.path_id, 514 inccb->ccb_h.target_id, 515 inccb->ccb_h.target_lun) != 516 CAM_REQ_CMP){ 517 error = EINVAL; 518 break; 519 } 520 /* Ensure all of our fields are correct */ 521 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 522 inccb->ccb_h.pinfo.priority); 523 xpt_merge_ccb(&ccb, inccb); 524 xpt_action(&ccb); 525 bcopy(&ccb, inccb, sizeof(union ccb)); 526 xpt_free_path(ccb.ccb_h.path); 527 break; 528 529 } 530 case XPT_DEV_MATCH: { 531 struct cam_periph_map_info mapinfo; 532 struct cam_path *old_path; 533 534 /* 535 * We can't deal with physical addresses for this 536 * type of transaction. 537 */ 538 if ((inccb->ccb_h.flags & CAM_DATA_MASK) != 539 CAM_DATA_VADDR) { 540 error = EINVAL; 541 break; 542 } 543 544 /* 545 * Save this in case the caller had it set to 546 * something in particular. 547 */ 548 old_path = inccb->ccb_h.path; 549 550 /* 551 * We really don't need a path for the matching 552 * code. The path is needed because of the 553 * debugging statements in xpt_action(). They 554 * assume that the CCB has a valid path. 555 */ 556 inccb->ccb_h.path = xpt_periph->path; 557 558 bzero(&mapinfo, sizeof(mapinfo)); 559 560 /* 561 * Map the pattern and match buffers into kernel 562 * virtual address space. 563 */ 564 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS); 565 566 if (error) { 567 inccb->ccb_h.path = old_path; 568 break; 569 } 570 571 /* 572 * This is an immediate CCB, we can send it on directly. 573 */ 574 xpt_action(inccb); 575 576 /* 577 * Map the buffers back into user space. 578 */ 579 cam_periph_unmapmem(inccb, &mapinfo); 580 581 inccb->ccb_h.path = old_path; 582 583 error = 0; 584 break; 585 } 586 default: 587 error = ENOTSUP; 588 break; 589 } 590 xpt_release_bus(bus); 591 break; 592 } 593 /* 594 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 595 * with the periphal driver name and unit name filled in. The other 596 * fields don't really matter as input. The passthrough driver name 597 * ("pass"), and unit number are passed back in the ccb. The current 598 * device generation number, and the index into the device peripheral 599 * driver list, and the status are also passed back. Note that 600 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 601 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 602 * (or rather should be) impossible for the device peripheral driver 603 * list to change since we look at the whole thing in one pass, and 604 * we do it with lock protection. 605 * 606 */ 607 case CAMGETPASSTHRU: { 608 union ccb *ccb; 609 struct cam_periph *periph; 610 struct periph_driver **p_drv; 611 char *name; 612 u_int unit; 613 int base_periph_found; 614 615 ccb = (union ccb *)addr; 616 unit = ccb->cgdl.unit_number; 617 name = ccb->cgdl.periph_name; 618 base_periph_found = 0; 619 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 620 if (ccb->ccb_h.func_code == XPT_SCSI_IO) 621 ccb->csio.bio = NULL; 622 #endif 623 624 /* 625 * Sanity check -- make sure we don't get a null peripheral 626 * driver name. 627 */ 628 if (*ccb->cgdl.periph_name == '\0') { 629 error = EINVAL; 630 break; 631 } 632 633 /* Keep the list from changing while we traverse it */ 634 xpt_lock_buses(); 635 636 /* first find our driver in the list of drivers */ 637 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) 638 if (strcmp((*p_drv)->driver_name, name) == 0) 639 break; 640 641 if (*p_drv == NULL) { 642 xpt_unlock_buses(); 643 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 644 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 645 *ccb->cgdl.periph_name = '\0'; 646 ccb->cgdl.unit_number = 0; 647 error = ENOENT; 648 break; 649 } 650 651 /* 652 * Run through every peripheral instance of this driver 653 * and check to see whether it matches the unit passed 654 * in by the user. If it does, get out of the loops and 655 * find the passthrough driver associated with that 656 * peripheral driver. 657 */ 658 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 659 periph = TAILQ_NEXT(periph, unit_links)) { 660 661 if (periph->unit_number == unit) 662 break; 663 } 664 /* 665 * If we found the peripheral driver that the user passed 666 * in, go through all of the peripheral drivers for that 667 * particular device and look for a passthrough driver. 668 */ 669 if (periph != NULL) { 670 struct cam_ed *device; 671 int i; 672 673 base_periph_found = 1; 674 device = periph->path->device; 675 for (i = 0, periph = SLIST_FIRST(&device->periphs); 676 periph != NULL; 677 periph = SLIST_NEXT(periph, periph_links), i++) { 678 /* 679 * Check to see whether we have a 680 * passthrough device or not. 681 */ 682 if (strcmp(periph->periph_name, "pass") == 0) { 683 /* 684 * Fill in the getdevlist fields. 685 */ 686 strcpy(ccb->cgdl.periph_name, 687 periph->periph_name); 688 ccb->cgdl.unit_number = 689 periph->unit_number; 690 if (SLIST_NEXT(periph, periph_links)) 691 ccb->cgdl.status = 692 CAM_GDEVLIST_MORE_DEVS; 693 else 694 ccb->cgdl.status = 695 CAM_GDEVLIST_LAST_DEVICE; 696 ccb->cgdl.generation = 697 device->generation; 698 ccb->cgdl.index = i; 699 /* 700 * Fill in some CCB header fields 701 * that the user may want. 702 */ 703 ccb->ccb_h.path_id = 704 periph->path->bus->path_id; 705 ccb->ccb_h.target_id = 706 periph->path->target->target_id; 707 ccb->ccb_h.target_lun = 708 periph->path->device->lun_id; 709 ccb->ccb_h.status = CAM_REQ_CMP; 710 break; 711 } 712 } 713 } 714 715 /* 716 * If the periph is null here, one of two things has 717 * happened. The first possibility is that we couldn't 718 * find the unit number of the particular peripheral driver 719 * that the user is asking about. e.g. the user asks for 720 * the passthrough driver for "da11". We find the list of 721 * "da" peripherals all right, but there is no unit 11. 722 * The other possibility is that we went through the list 723 * of peripheral drivers attached to the device structure, 724 * but didn't find one with the name "pass". Either way, 725 * we return ENOENT, since we couldn't find something. 726 */ 727 if (periph == NULL) { 728 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 729 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 730 *ccb->cgdl.periph_name = '\0'; 731 ccb->cgdl.unit_number = 0; 732 error = ENOENT; 733 /* 734 * It is unfortunate that this is even necessary, 735 * but there are many, many clueless users out there. 736 * If this is true, the user is looking for the 737 * passthrough driver, but doesn't have one in his 738 * kernel. 739 */ 740 if (base_periph_found == 1) { 741 printf("xptioctl: pass driver is not in the " 742 "kernel\n"); 743 printf("xptioctl: put \"device pass\" in " 744 "your kernel config file\n"); 745 } 746 } 747 xpt_unlock_buses(); 748 break; 749 } 750 default: 751 error = ENOTTY; 752 break; 753 } 754 755 return(error); 756 } 757 758 static int 759 cam_module_event_handler(module_t mod, int what, void *arg) 760 { 761 int error; 762 763 switch (what) { 764 case MOD_LOAD: 765 if ((error = xpt_init(NULL)) != 0) 766 return (error); 767 break; 768 case MOD_UNLOAD: 769 return EBUSY; 770 default: 771 return EOPNOTSUPP; 772 } 773 774 return 0; 775 } 776 777 static struct xpt_proto * 778 xpt_proto_find(cam_proto proto) 779 { 780 struct xpt_proto **pp; 781 782 SET_FOREACH(pp, cam_xpt_proto_set) { 783 if ((*pp)->proto == proto) 784 return *pp; 785 } 786 787 return NULL; 788 } 789 790 static void 791 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb) 792 { 793 794 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) { 795 xpt_free_path(done_ccb->ccb_h.path); 796 xpt_free_ccb(done_ccb); 797 } else { 798 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1; 799 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb); 800 } 801 xpt_release_boot(); 802 } 803 804 /* thread to handle bus rescans */ 805 static void 806 xpt_scanner_thread(void *dummy) 807 { 808 union ccb *ccb; 809 struct cam_path path; 810 811 xpt_lock_buses(); 812 for (;;) { 813 if (TAILQ_EMPTY(&xsoftc.ccb_scanq)) 814 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO, 815 "-", 0); 816 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 817 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 818 xpt_unlock_buses(); 819 820 /* 821 * Since lock can be dropped inside and path freed 822 * by completion callback even before return here, 823 * take our own path copy for reference. 824 */ 825 xpt_copy_path(&path, ccb->ccb_h.path); 826 xpt_path_lock(&path); 827 xpt_action(ccb); 828 xpt_path_unlock(&path); 829 xpt_release_path(&path); 830 831 xpt_lock_buses(); 832 } 833 } 834 } 835 836 void 837 xpt_rescan(union ccb *ccb) 838 { 839 struct ccb_hdr *hdr; 840 841 /* Prepare request */ 842 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD && 843 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 844 ccb->ccb_h.func_code = XPT_SCAN_BUS; 845 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 846 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD) 847 ccb->ccb_h.func_code = XPT_SCAN_TGT; 848 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD && 849 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD) 850 ccb->ccb_h.func_code = XPT_SCAN_LUN; 851 else { 852 xpt_print(ccb->ccb_h.path, "illegal scan path\n"); 853 xpt_free_path(ccb->ccb_h.path); 854 xpt_free_ccb(ccb); 855 return; 856 } 857 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 858 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code, 859 xpt_action_name(ccb->ccb_h.func_code))); 860 861 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp; 862 ccb->ccb_h.cbfcnp = xpt_rescan_done; 863 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT); 864 /* Don't make duplicate entries for the same paths. */ 865 xpt_lock_buses(); 866 if (ccb->ccb_h.ppriv_ptr1 == NULL) { 867 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 868 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 869 wakeup(&xsoftc.ccb_scanq); 870 xpt_unlock_buses(); 871 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 872 xpt_free_path(ccb->ccb_h.path); 873 xpt_free_ccb(ccb); 874 return; 875 } 876 } 877 } 878 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 879 xsoftc.buses_to_config++; 880 wakeup(&xsoftc.ccb_scanq); 881 xpt_unlock_buses(); 882 } 883 884 /* Functions accessed by the peripheral drivers */ 885 static int 886 xpt_init(void *dummy) 887 { 888 struct cam_sim *xpt_sim; 889 struct cam_path *path; 890 struct cam_devq *devq; 891 cam_status status; 892 int error, i; 893 894 TAILQ_INIT(&xsoftc.xpt_busses); 895 TAILQ_INIT(&xsoftc.ccb_scanq); 896 STAILQ_INIT(&xsoftc.highpowerq); 897 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 898 899 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF); 900 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF); 901 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK, 902 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq); 903 904 #ifdef CAM_BOOT_DELAY 905 /* 906 * Override this value at compile time to assist our users 907 * who don't use loader to boot a kernel. 908 */ 909 xsoftc.boot_delay = CAM_BOOT_DELAY; 910 #endif 911 /* 912 * The xpt layer is, itself, the equivalent of a SIM. 913 * Allow 16 ccbs in the ccb pool for it. This should 914 * give decent parallelism when we probe buses and 915 * perform other XPT functions. 916 */ 917 devq = cam_simq_alloc(16); 918 xpt_sim = cam_sim_alloc(xptaction, 919 xptpoll, 920 "xpt", 921 /*softc*/NULL, 922 /*unit*/0, 923 /*mtx*/&xsoftc.xpt_lock, 924 /*max_dev_transactions*/0, 925 /*max_tagged_dev_transactions*/0, 926 devq); 927 if (xpt_sim == NULL) 928 return (ENOMEM); 929 930 mtx_lock(&xsoftc.xpt_lock); 931 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) { 932 mtx_unlock(&xsoftc.xpt_lock); 933 printf("xpt_init: xpt_bus_register failed with status %#x," 934 " failing attach\n", status); 935 return (EINVAL); 936 } 937 mtx_unlock(&xsoftc.xpt_lock); 938 939 /* 940 * Looking at the XPT from the SIM layer, the XPT is 941 * the equivalent of a peripheral driver. Allocate 942 * a peripheral driver entry for us. 943 */ 944 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 945 CAM_TARGET_WILDCARD, 946 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 947 printf("xpt_init: xpt_create_path failed with status %#x," 948 " failing attach\n", status); 949 return (EINVAL); 950 } 951 xpt_path_lock(path); 952 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 953 path, NULL, 0, xpt_sim); 954 xpt_path_unlock(path); 955 xpt_free_path(path); 956 957 if (cam_num_doneqs < 1) 958 cam_num_doneqs = 1 + mp_ncpus / 6; 959 else if (cam_num_doneqs > MAXCPU) 960 cam_num_doneqs = MAXCPU; 961 for (i = 0; i < cam_num_doneqs; i++) { 962 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL, 963 MTX_DEF); 964 STAILQ_INIT(&cam_doneqs[i].cam_doneq); 965 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i], 966 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i); 967 if (error != 0) { 968 cam_num_doneqs = i; 969 break; 970 } 971 } 972 if (cam_num_doneqs < 1) { 973 printf("xpt_init: Cannot init completion queues " 974 "- failing attach\n"); 975 return (ENOMEM); 976 } 977 /* 978 * Register a callback for when interrupts are enabled. 979 */ 980 xsoftc.xpt_config_hook = 981 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 982 M_CAMXPT, M_NOWAIT | M_ZERO); 983 if (xsoftc.xpt_config_hook == NULL) { 984 printf("xpt_init: Cannot malloc config hook " 985 "- failing attach\n"); 986 return (ENOMEM); 987 } 988 xsoftc.xpt_config_hook->ich_func = xpt_config; 989 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 990 free (xsoftc.xpt_config_hook, M_CAMXPT); 991 printf("xpt_init: config_intrhook_establish failed " 992 "- failing attach\n"); 993 } 994 995 return (0); 996 } 997 998 static cam_status 999 xptregister(struct cam_periph *periph, void *arg) 1000 { 1001 struct cam_sim *xpt_sim; 1002 1003 if (periph == NULL) { 1004 printf("xptregister: periph was NULL!!\n"); 1005 return(CAM_REQ_CMP_ERR); 1006 } 1007 1008 xpt_sim = (struct cam_sim *)arg; 1009 xpt_sim->softc = periph; 1010 xpt_periph = periph; 1011 periph->softc = NULL; 1012 1013 return(CAM_REQ_CMP); 1014 } 1015 1016 int32_t 1017 xpt_add_periph(struct cam_periph *periph) 1018 { 1019 struct cam_ed *device; 1020 int32_t status; 1021 1022 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph); 1023 device = periph->path->device; 1024 status = CAM_REQ_CMP; 1025 if (device != NULL) { 1026 mtx_lock(&device->target->bus->eb_mtx); 1027 device->generation++; 1028 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links); 1029 mtx_unlock(&device->target->bus->eb_mtx); 1030 atomic_add_32(&xsoftc.xpt_generation, 1); 1031 } 1032 1033 return (status); 1034 } 1035 1036 void 1037 xpt_remove_periph(struct cam_periph *periph) 1038 { 1039 struct cam_ed *device; 1040 1041 device = periph->path->device; 1042 if (device != NULL) { 1043 mtx_lock(&device->target->bus->eb_mtx); 1044 device->generation++; 1045 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links); 1046 mtx_unlock(&device->target->bus->eb_mtx); 1047 atomic_add_32(&xsoftc.xpt_generation, 1); 1048 } 1049 } 1050 1051 1052 void 1053 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1054 { 1055 struct cam_path *path = periph->path; 1056 struct xpt_proto *proto; 1057 1058 cam_periph_assert(periph, MA_OWNED); 1059 periph->flags |= CAM_PERIPH_ANNOUNCED; 1060 1061 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1062 periph->periph_name, periph->unit_number, 1063 path->bus->sim->sim_name, 1064 path->bus->sim->unit_number, 1065 path->bus->sim->bus_id, 1066 path->bus->path_id, 1067 path->target->target_id, 1068 (uintmax_t)path->device->lun_id); 1069 printf("%s%d: ", periph->periph_name, periph->unit_number); 1070 proto = xpt_proto_find(path->device->protocol); 1071 if (proto) 1072 proto->ops->announce(path->device); 1073 else 1074 printf("%s%d: Unknown protocol device %d\n", 1075 periph->periph_name, periph->unit_number, 1076 path->device->protocol); 1077 if (path->device->serial_num_len > 0) { 1078 /* Don't wrap the screen - print only the first 60 chars */ 1079 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1080 periph->unit_number, path->device->serial_num); 1081 } 1082 /* Announce transport details. */ 1083 path->bus->xport->ops->announce(periph); 1084 /* Announce command queueing. */ 1085 if (path->device->inq_flags & SID_CmdQue 1086 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1087 printf("%s%d: Command Queueing enabled\n", 1088 periph->periph_name, periph->unit_number); 1089 } 1090 /* Announce caller's details if they've passed in. */ 1091 if (announce_string != NULL) 1092 printf("%s%d: %s\n", periph->periph_name, 1093 periph->unit_number, announce_string); 1094 } 1095 1096 void 1097 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string) 1098 { 1099 if (quirks != 0) { 1100 printf("%s%d: quirks=0x%b\n", periph->periph_name, 1101 periph->unit_number, quirks, bit_string); 1102 } 1103 } 1104 1105 void 1106 xpt_denounce_periph(struct cam_periph *periph) 1107 { 1108 struct cam_path *path = periph->path; 1109 struct xpt_proto *proto; 1110 1111 cam_periph_assert(periph, MA_OWNED); 1112 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n", 1113 periph->periph_name, periph->unit_number, 1114 path->bus->sim->sim_name, 1115 path->bus->sim->unit_number, 1116 path->bus->sim->bus_id, 1117 path->bus->path_id, 1118 path->target->target_id, 1119 (uintmax_t)path->device->lun_id); 1120 printf("%s%d: ", periph->periph_name, periph->unit_number); 1121 proto = xpt_proto_find(path->device->protocol); 1122 if (proto) 1123 proto->ops->denounce(path->device); 1124 else 1125 printf("%s%d: Unknown protocol device %d\n", 1126 periph->periph_name, periph->unit_number, 1127 path->device->protocol); 1128 if (path->device->serial_num_len > 0) 1129 printf(" s/n %.60s", path->device->serial_num); 1130 printf(" detached\n"); 1131 } 1132 1133 1134 int 1135 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path) 1136 { 1137 int ret = -1, l, o; 1138 struct ccb_dev_advinfo cdai; 1139 struct scsi_vpd_id_descriptor *idd; 1140 1141 xpt_path_assert(path, MA_OWNED); 1142 1143 memset(&cdai, 0, sizeof(cdai)); 1144 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL); 1145 cdai.ccb_h.func_code = XPT_DEV_ADVINFO; 1146 cdai.flags = CDAI_FLAG_NONE; 1147 cdai.bufsiz = len; 1148 1149 if (!strcmp(attr, "GEOM::ident")) 1150 cdai.buftype = CDAI_TYPE_SERIAL_NUM; 1151 else if (!strcmp(attr, "GEOM::physpath")) 1152 cdai.buftype = CDAI_TYPE_PHYS_PATH; 1153 else if (strcmp(attr, "GEOM::lunid") == 0 || 1154 strcmp(attr, "GEOM::lunname") == 0) { 1155 cdai.buftype = CDAI_TYPE_SCSI_DEVID; 1156 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN; 1157 } else 1158 goto out; 1159 1160 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO); 1161 if (cdai.buf == NULL) { 1162 ret = ENOMEM; 1163 goto out; 1164 } 1165 xpt_action((union ccb *)&cdai); /* can only be synchronous */ 1166 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0) 1167 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE); 1168 if (cdai.provsiz == 0) 1169 goto out; 1170 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) { 1171 if (strcmp(attr, "GEOM::lunid") == 0) { 1172 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1173 cdai.provsiz, scsi_devid_is_lun_naa); 1174 if (idd == NULL) 1175 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1176 cdai.provsiz, scsi_devid_is_lun_eui64); 1177 if (idd == NULL) 1178 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1179 cdai.provsiz, scsi_devid_is_lun_uuid); 1180 if (idd == NULL) 1181 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1182 cdai.provsiz, scsi_devid_is_lun_md5); 1183 } else 1184 idd = NULL; 1185 if (idd == NULL) 1186 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1187 cdai.provsiz, scsi_devid_is_lun_t10); 1188 if (idd == NULL) 1189 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf, 1190 cdai.provsiz, scsi_devid_is_lun_name); 1191 if (idd == NULL) 1192 goto out; 1193 ret = 0; 1194 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) { 1195 if (idd->length < len) { 1196 for (l = 0; l < idd->length; l++) 1197 buf[l] = idd->identifier[l] ? 1198 idd->identifier[l] : ' '; 1199 buf[l] = 0; 1200 } else 1201 ret = EFAULT; 1202 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) { 1203 l = strnlen(idd->identifier, idd->length); 1204 if (l < len) { 1205 bcopy(idd->identifier, buf, l); 1206 buf[l] = 0; 1207 } else 1208 ret = EFAULT; 1209 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID 1210 && idd->identifier[0] == 0x10) { 1211 if ((idd->length - 2) * 2 + 4 < len) { 1212 for (l = 2, o = 0; l < idd->length; l++) { 1213 if (l == 6 || l == 8 || l == 10 || l == 12) 1214 o += sprintf(buf + o, "-"); 1215 o += sprintf(buf + o, "%02x", 1216 idd->identifier[l]); 1217 } 1218 } else 1219 ret = EFAULT; 1220 } else { 1221 if (idd->length * 2 < len) { 1222 for (l = 0; l < idd->length; l++) 1223 sprintf(buf + l * 2, "%02x", 1224 idd->identifier[l]); 1225 } else 1226 ret = EFAULT; 1227 } 1228 } else { 1229 ret = 0; 1230 if (strlcpy(buf, cdai.buf, len) >= len) 1231 ret = EFAULT; 1232 } 1233 1234 out: 1235 if (cdai.buf != NULL) 1236 free(cdai.buf, M_CAMXPT); 1237 return ret; 1238 } 1239 1240 static dev_match_ret 1241 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1242 struct cam_eb *bus) 1243 { 1244 dev_match_ret retval; 1245 u_int i; 1246 1247 retval = DM_RET_NONE; 1248 1249 /* 1250 * If we aren't given something to match against, that's an error. 1251 */ 1252 if (bus == NULL) 1253 return(DM_RET_ERROR); 1254 1255 /* 1256 * If there are no match entries, then this bus matches no 1257 * matter what. 1258 */ 1259 if ((patterns == NULL) || (num_patterns == 0)) 1260 return(DM_RET_DESCEND | DM_RET_COPY); 1261 1262 for (i = 0; i < num_patterns; i++) { 1263 struct bus_match_pattern *cur_pattern; 1264 1265 /* 1266 * If the pattern in question isn't for a bus node, we 1267 * aren't interested. However, we do indicate to the 1268 * calling routine that we should continue descending the 1269 * tree, since the user wants to match against lower-level 1270 * EDT elements. 1271 */ 1272 if (patterns[i].type != DEV_MATCH_BUS) { 1273 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1274 retval |= DM_RET_DESCEND; 1275 continue; 1276 } 1277 1278 cur_pattern = &patterns[i].pattern.bus_pattern; 1279 1280 /* 1281 * If they want to match any bus node, we give them any 1282 * device node. 1283 */ 1284 if (cur_pattern->flags == BUS_MATCH_ANY) { 1285 /* set the copy flag */ 1286 retval |= DM_RET_COPY; 1287 1288 /* 1289 * If we've already decided on an action, go ahead 1290 * and return. 1291 */ 1292 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1293 return(retval); 1294 } 1295 1296 /* 1297 * Not sure why someone would do this... 1298 */ 1299 if (cur_pattern->flags == BUS_MATCH_NONE) 1300 continue; 1301 1302 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1303 && (cur_pattern->path_id != bus->path_id)) 1304 continue; 1305 1306 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1307 && (cur_pattern->bus_id != bus->sim->bus_id)) 1308 continue; 1309 1310 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1311 && (cur_pattern->unit_number != bus->sim->unit_number)) 1312 continue; 1313 1314 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1315 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1316 DEV_IDLEN) != 0)) 1317 continue; 1318 1319 /* 1320 * If we get to this point, the user definitely wants 1321 * information on this bus. So tell the caller to copy the 1322 * data out. 1323 */ 1324 retval |= DM_RET_COPY; 1325 1326 /* 1327 * If the return action has been set to descend, then we 1328 * know that we've already seen a non-bus matching 1329 * expression, therefore we need to further descend the tree. 1330 * This won't change by continuing around the loop, so we 1331 * go ahead and return. If we haven't seen a non-bus 1332 * matching expression, we keep going around the loop until 1333 * we exhaust the matching expressions. We'll set the stop 1334 * flag once we fall out of the loop. 1335 */ 1336 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1337 return(retval); 1338 } 1339 1340 /* 1341 * If the return action hasn't been set to descend yet, that means 1342 * we haven't seen anything other than bus matching patterns. So 1343 * tell the caller to stop descending the tree -- the user doesn't 1344 * want to match against lower level tree elements. 1345 */ 1346 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1347 retval |= DM_RET_STOP; 1348 1349 return(retval); 1350 } 1351 1352 static dev_match_ret 1353 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1354 struct cam_ed *device) 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 (device == NULL) 1365 return(DM_RET_ERROR); 1366 1367 /* 1368 * If there are no match entries, then this device 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 device_match_pattern *cur_pattern; 1376 struct scsi_vpd_device_id *device_id_page; 1377 1378 /* 1379 * If the pattern in question isn't for a device node, we 1380 * aren't interested. 1381 */ 1382 if (patterns[i].type != DEV_MATCH_DEVICE) { 1383 if ((patterns[i].type == DEV_MATCH_PERIPH) 1384 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1385 retval |= DM_RET_DESCEND; 1386 continue; 1387 } 1388 1389 cur_pattern = &patterns[i].pattern.device_pattern; 1390 1391 /* Error out if mutually exclusive options are specified. */ 1392 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1393 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID)) 1394 return(DM_RET_ERROR); 1395 1396 /* 1397 * If they want to match any device node, we give them any 1398 * device node. 1399 */ 1400 if (cur_pattern->flags == DEV_MATCH_ANY) 1401 goto copy_dev_node; 1402 1403 /* 1404 * Not sure why someone would do this... 1405 */ 1406 if (cur_pattern->flags == DEV_MATCH_NONE) 1407 continue; 1408 1409 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1410 && (cur_pattern->path_id != device->target->bus->path_id)) 1411 continue; 1412 1413 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1414 && (cur_pattern->target_id != device->target->target_id)) 1415 continue; 1416 1417 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1418 && (cur_pattern->target_lun != device->lun_id)) 1419 continue; 1420 1421 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1422 && (cam_quirkmatch((caddr_t)&device->inq_data, 1423 (caddr_t)&cur_pattern->data.inq_pat, 1424 1, sizeof(cur_pattern->data.inq_pat), 1425 scsi_static_inquiry_match) == NULL)) 1426 continue; 1427 1428 device_id_page = (struct scsi_vpd_device_id *)device->device_id; 1429 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0) 1430 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN 1431 || scsi_devid_match((uint8_t *)device_id_page->desc_list, 1432 device->device_id_len 1433 - SVPD_DEVICE_ID_HDR_LEN, 1434 cur_pattern->data.devid_pat.id, 1435 cur_pattern->data.devid_pat.id_len) != 0)) 1436 continue; 1437 1438 copy_dev_node: 1439 /* 1440 * If we get to this point, the user definitely wants 1441 * information on this device. So tell the caller to copy 1442 * the data out. 1443 */ 1444 retval |= DM_RET_COPY; 1445 1446 /* 1447 * If the return action has been set to descend, then we 1448 * know that we've already seen a peripheral matching 1449 * expression, therefore we need to further descend the tree. 1450 * This won't change by continuing around the loop, so we 1451 * go ahead and return. If we haven't seen a peripheral 1452 * matching expression, we keep going around the loop until 1453 * we exhaust the matching expressions. We'll set the stop 1454 * flag once we fall out of the loop. 1455 */ 1456 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1457 return(retval); 1458 } 1459 1460 /* 1461 * If the return action hasn't been set to descend yet, that means 1462 * we haven't seen any peripheral matching patterns. So tell the 1463 * caller to stop descending the tree -- the user doesn't want to 1464 * match against lower level tree elements. 1465 */ 1466 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1467 retval |= DM_RET_STOP; 1468 1469 return(retval); 1470 } 1471 1472 /* 1473 * Match a single peripheral against any number of match patterns. 1474 */ 1475 static dev_match_ret 1476 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1477 struct cam_periph *periph) 1478 { 1479 dev_match_ret retval; 1480 u_int i; 1481 1482 /* 1483 * If we aren't given something to match against, that's an error. 1484 */ 1485 if (periph == NULL) 1486 return(DM_RET_ERROR); 1487 1488 /* 1489 * If there are no match entries, then this peripheral matches no 1490 * matter what. 1491 */ 1492 if ((patterns == NULL) || (num_patterns == 0)) 1493 return(DM_RET_STOP | DM_RET_COPY); 1494 1495 /* 1496 * There aren't any nodes below a peripheral node, so there's no 1497 * reason to descend the tree any further. 1498 */ 1499 retval = DM_RET_STOP; 1500 1501 for (i = 0; i < num_patterns; i++) { 1502 struct periph_match_pattern *cur_pattern; 1503 1504 /* 1505 * If the pattern in question isn't for a peripheral, we 1506 * aren't interested. 1507 */ 1508 if (patterns[i].type != DEV_MATCH_PERIPH) 1509 continue; 1510 1511 cur_pattern = &patterns[i].pattern.periph_pattern; 1512 1513 /* 1514 * If they want to match on anything, then we will do so. 1515 */ 1516 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1517 /* set the copy flag */ 1518 retval |= DM_RET_COPY; 1519 1520 /* 1521 * We've already set the return action to stop, 1522 * since there are no nodes below peripherals in 1523 * the tree. 1524 */ 1525 return(retval); 1526 } 1527 1528 /* 1529 * Not sure why someone would do this... 1530 */ 1531 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1532 continue; 1533 1534 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1535 && (cur_pattern->path_id != periph->path->bus->path_id)) 1536 continue; 1537 1538 /* 1539 * For the target and lun id's, we have to make sure the 1540 * target and lun pointers aren't NULL. The xpt peripheral 1541 * has a wildcard target and device. 1542 */ 1543 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1544 && ((periph->path->target == NULL) 1545 ||(cur_pattern->target_id != periph->path->target->target_id))) 1546 continue; 1547 1548 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1549 && ((periph->path->device == NULL) 1550 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1551 continue; 1552 1553 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1554 && (cur_pattern->unit_number != periph->unit_number)) 1555 continue; 1556 1557 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1558 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1559 DEV_IDLEN) != 0)) 1560 continue; 1561 1562 /* 1563 * If we get to this point, the user definitely wants 1564 * information on this peripheral. So tell the caller to 1565 * copy the data out. 1566 */ 1567 retval |= DM_RET_COPY; 1568 1569 /* 1570 * The return action has already been set to stop, since 1571 * peripherals don't have any nodes below them in the EDT. 1572 */ 1573 return(retval); 1574 } 1575 1576 /* 1577 * If we get to this point, the peripheral that was passed in 1578 * doesn't match any of the patterns. 1579 */ 1580 return(retval); 1581 } 1582 1583 static int 1584 xptedtbusfunc(struct cam_eb *bus, void *arg) 1585 { 1586 struct ccb_dev_match *cdm; 1587 struct cam_et *target; 1588 dev_match_ret retval; 1589 1590 cdm = (struct ccb_dev_match *)arg; 1591 1592 /* 1593 * If our position is for something deeper in the tree, that means 1594 * that we've already seen this node. So, we keep going down. 1595 */ 1596 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1597 && (cdm->pos.cookie.bus == bus) 1598 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1599 && (cdm->pos.cookie.target != NULL)) 1600 retval = DM_RET_DESCEND; 1601 else 1602 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1603 1604 /* 1605 * If we got an error, bail out of the search. 1606 */ 1607 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1608 cdm->status = CAM_DEV_MATCH_ERROR; 1609 return(0); 1610 } 1611 1612 /* 1613 * If the copy flag is set, copy this bus out. 1614 */ 1615 if (retval & DM_RET_COPY) { 1616 int spaceleft, j; 1617 1618 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1619 sizeof(struct dev_match_result)); 1620 1621 /* 1622 * If we don't have enough space to put in another 1623 * match result, save our position and tell the 1624 * user there are more devices to check. 1625 */ 1626 if (spaceleft < sizeof(struct dev_match_result)) { 1627 bzero(&cdm->pos, sizeof(cdm->pos)); 1628 cdm->pos.position_type = 1629 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1630 1631 cdm->pos.cookie.bus = bus; 1632 cdm->pos.generations[CAM_BUS_GENERATION]= 1633 xsoftc.bus_generation; 1634 cdm->status = CAM_DEV_MATCH_MORE; 1635 return(0); 1636 } 1637 j = cdm->num_matches; 1638 cdm->num_matches++; 1639 cdm->matches[j].type = DEV_MATCH_BUS; 1640 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1641 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1642 cdm->matches[j].result.bus_result.unit_number = 1643 bus->sim->unit_number; 1644 strncpy(cdm->matches[j].result.bus_result.dev_name, 1645 bus->sim->sim_name, DEV_IDLEN); 1646 } 1647 1648 /* 1649 * If the user is only interested in buses, there's no 1650 * reason to descend to the next level in the tree. 1651 */ 1652 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1653 return(1); 1654 1655 /* 1656 * If there is a target generation recorded, check it to 1657 * make sure the target list hasn't changed. 1658 */ 1659 mtx_lock(&bus->eb_mtx); 1660 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1661 && (cdm->pos.cookie.bus == bus) 1662 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1663 && (cdm->pos.cookie.target != NULL)) { 1664 if ((cdm->pos.generations[CAM_TARGET_GENERATION] != 1665 bus->generation)) { 1666 mtx_unlock(&bus->eb_mtx); 1667 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1668 return (0); 1669 } 1670 target = (struct cam_et *)cdm->pos.cookie.target; 1671 target->refcount++; 1672 } else 1673 target = NULL; 1674 mtx_unlock(&bus->eb_mtx); 1675 1676 return (xpttargettraverse(bus, target, xptedttargetfunc, arg)); 1677 } 1678 1679 static int 1680 xptedttargetfunc(struct cam_et *target, void *arg) 1681 { 1682 struct ccb_dev_match *cdm; 1683 struct cam_eb *bus; 1684 struct cam_ed *device; 1685 1686 cdm = (struct ccb_dev_match *)arg; 1687 bus = target->bus; 1688 1689 /* 1690 * If there is a device list generation recorded, check it to 1691 * make sure the device list hasn't changed. 1692 */ 1693 mtx_lock(&bus->eb_mtx); 1694 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1695 && (cdm->pos.cookie.bus == bus) 1696 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1697 && (cdm->pos.cookie.target == target) 1698 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1699 && (cdm->pos.cookie.device != NULL)) { 1700 if (cdm->pos.generations[CAM_DEV_GENERATION] != 1701 target->generation) { 1702 mtx_unlock(&bus->eb_mtx); 1703 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1704 return(0); 1705 } 1706 device = (struct cam_ed *)cdm->pos.cookie.device; 1707 device->refcount++; 1708 } else 1709 device = NULL; 1710 mtx_unlock(&bus->eb_mtx); 1711 1712 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg)); 1713 } 1714 1715 static int 1716 xptedtdevicefunc(struct cam_ed *device, void *arg) 1717 { 1718 struct cam_eb *bus; 1719 struct cam_periph *periph; 1720 struct ccb_dev_match *cdm; 1721 dev_match_ret retval; 1722 1723 cdm = (struct ccb_dev_match *)arg; 1724 bus = device->target->bus; 1725 1726 /* 1727 * If our position is for something deeper in the tree, that means 1728 * that we've already seen this node. So, we keep going down. 1729 */ 1730 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1731 && (cdm->pos.cookie.device == device) 1732 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1733 && (cdm->pos.cookie.periph != NULL)) 1734 retval = DM_RET_DESCEND; 1735 else 1736 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1737 device); 1738 1739 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1740 cdm->status = CAM_DEV_MATCH_ERROR; 1741 return(0); 1742 } 1743 1744 /* 1745 * If the copy flag is set, copy this device out. 1746 */ 1747 if (retval & DM_RET_COPY) { 1748 int spaceleft, j; 1749 1750 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1751 sizeof(struct dev_match_result)); 1752 1753 /* 1754 * If we don't have enough space to put in another 1755 * match result, save our position and tell the 1756 * user there are more devices to check. 1757 */ 1758 if (spaceleft < sizeof(struct dev_match_result)) { 1759 bzero(&cdm->pos, sizeof(cdm->pos)); 1760 cdm->pos.position_type = 1761 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1762 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 1763 1764 cdm->pos.cookie.bus = device->target->bus; 1765 cdm->pos.generations[CAM_BUS_GENERATION]= 1766 xsoftc.bus_generation; 1767 cdm->pos.cookie.target = device->target; 1768 cdm->pos.generations[CAM_TARGET_GENERATION] = 1769 device->target->bus->generation; 1770 cdm->pos.cookie.device = device; 1771 cdm->pos.generations[CAM_DEV_GENERATION] = 1772 device->target->generation; 1773 cdm->status = CAM_DEV_MATCH_MORE; 1774 return(0); 1775 } 1776 j = cdm->num_matches; 1777 cdm->num_matches++; 1778 cdm->matches[j].type = DEV_MATCH_DEVICE; 1779 cdm->matches[j].result.device_result.path_id = 1780 device->target->bus->path_id; 1781 cdm->matches[j].result.device_result.target_id = 1782 device->target->target_id; 1783 cdm->matches[j].result.device_result.target_lun = 1784 device->lun_id; 1785 cdm->matches[j].result.device_result.protocol = 1786 device->protocol; 1787 bcopy(&device->inq_data, 1788 &cdm->matches[j].result.device_result.inq_data, 1789 sizeof(struct scsi_inquiry_data)); 1790 bcopy(&device->ident_data, 1791 &cdm->matches[j].result.device_result.ident_data, 1792 sizeof(struct ata_params)); 1793 1794 /* Let the user know whether this device is unconfigured */ 1795 if (device->flags & CAM_DEV_UNCONFIGURED) 1796 cdm->matches[j].result.device_result.flags = 1797 DEV_RESULT_UNCONFIGURED; 1798 else 1799 cdm->matches[j].result.device_result.flags = 1800 DEV_RESULT_NOFLAG; 1801 } 1802 1803 /* 1804 * If the user isn't interested in peripherals, don't descend 1805 * the tree any further. 1806 */ 1807 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1808 return(1); 1809 1810 /* 1811 * If there is a peripheral list generation recorded, make sure 1812 * it hasn't changed. 1813 */ 1814 xpt_lock_buses(); 1815 mtx_lock(&bus->eb_mtx); 1816 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1817 && (cdm->pos.cookie.bus == bus) 1818 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1819 && (cdm->pos.cookie.target == device->target) 1820 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1821 && (cdm->pos.cookie.device == device) 1822 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1823 && (cdm->pos.cookie.periph != NULL)) { 1824 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1825 device->generation) { 1826 mtx_unlock(&bus->eb_mtx); 1827 xpt_unlock_buses(); 1828 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1829 return(0); 1830 } 1831 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1832 periph->refcount++; 1833 } else 1834 periph = NULL; 1835 mtx_unlock(&bus->eb_mtx); 1836 xpt_unlock_buses(); 1837 1838 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg)); 1839 } 1840 1841 static int 1842 xptedtperiphfunc(struct cam_periph *periph, void *arg) 1843 { 1844 struct ccb_dev_match *cdm; 1845 dev_match_ret retval; 1846 1847 cdm = (struct ccb_dev_match *)arg; 1848 1849 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1850 1851 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1852 cdm->status = CAM_DEV_MATCH_ERROR; 1853 return(0); 1854 } 1855 1856 /* 1857 * If the copy flag is set, copy this peripheral out. 1858 */ 1859 if (retval & DM_RET_COPY) { 1860 int spaceleft, j; 1861 1862 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1863 sizeof(struct dev_match_result)); 1864 1865 /* 1866 * If we don't have enough space to put in another 1867 * match result, save our position and tell the 1868 * user there are more devices to check. 1869 */ 1870 if (spaceleft < sizeof(struct dev_match_result)) { 1871 bzero(&cdm->pos, sizeof(cdm->pos)); 1872 cdm->pos.position_type = 1873 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 1874 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 1875 CAM_DEV_POS_PERIPH; 1876 1877 cdm->pos.cookie.bus = periph->path->bus; 1878 cdm->pos.generations[CAM_BUS_GENERATION]= 1879 xsoftc.bus_generation; 1880 cdm->pos.cookie.target = periph->path->target; 1881 cdm->pos.generations[CAM_TARGET_GENERATION] = 1882 periph->path->bus->generation; 1883 cdm->pos.cookie.device = periph->path->device; 1884 cdm->pos.generations[CAM_DEV_GENERATION] = 1885 periph->path->target->generation; 1886 cdm->pos.cookie.periph = periph; 1887 cdm->pos.generations[CAM_PERIPH_GENERATION] = 1888 periph->path->device->generation; 1889 cdm->status = CAM_DEV_MATCH_MORE; 1890 return(0); 1891 } 1892 1893 j = cdm->num_matches; 1894 cdm->num_matches++; 1895 cdm->matches[j].type = DEV_MATCH_PERIPH; 1896 cdm->matches[j].result.periph_result.path_id = 1897 periph->path->bus->path_id; 1898 cdm->matches[j].result.periph_result.target_id = 1899 periph->path->target->target_id; 1900 cdm->matches[j].result.periph_result.target_lun = 1901 periph->path->device->lun_id; 1902 cdm->matches[j].result.periph_result.unit_number = 1903 periph->unit_number; 1904 strncpy(cdm->matches[j].result.periph_result.periph_name, 1905 periph->periph_name, DEV_IDLEN); 1906 } 1907 1908 return(1); 1909 } 1910 1911 static int 1912 xptedtmatch(struct ccb_dev_match *cdm) 1913 { 1914 struct cam_eb *bus; 1915 int ret; 1916 1917 cdm->num_matches = 0; 1918 1919 /* 1920 * Check the bus list generation. If it has changed, the user 1921 * needs to reset everything and start over. 1922 */ 1923 xpt_lock_buses(); 1924 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1925 && (cdm->pos.cookie.bus != NULL)) { 1926 if (cdm->pos.generations[CAM_BUS_GENERATION] != 1927 xsoftc.bus_generation) { 1928 xpt_unlock_buses(); 1929 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1930 return(0); 1931 } 1932 bus = (struct cam_eb *)cdm->pos.cookie.bus; 1933 bus->refcount++; 1934 } else 1935 bus = NULL; 1936 xpt_unlock_buses(); 1937 1938 ret = xptbustraverse(bus, xptedtbusfunc, cdm); 1939 1940 /* 1941 * If we get back 0, that means that we had to stop before fully 1942 * traversing the EDT. It also means that one of the subroutines 1943 * has set the status field to the proper value. If we get back 1, 1944 * we've fully traversed the EDT and copied out any matching entries. 1945 */ 1946 if (ret == 1) 1947 cdm->status = CAM_DEV_MATCH_LAST; 1948 1949 return(ret); 1950 } 1951 1952 static int 1953 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 1954 { 1955 struct cam_periph *periph; 1956 struct ccb_dev_match *cdm; 1957 1958 cdm = (struct ccb_dev_match *)arg; 1959 1960 xpt_lock_buses(); 1961 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 1962 && (cdm->pos.cookie.pdrv == pdrv) 1963 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1964 && (cdm->pos.cookie.periph != NULL)) { 1965 if (cdm->pos.generations[CAM_PERIPH_GENERATION] != 1966 (*pdrv)->generation) { 1967 xpt_unlock_buses(); 1968 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1969 return(0); 1970 } 1971 periph = (struct cam_periph *)cdm->pos.cookie.periph; 1972 periph->refcount++; 1973 } else 1974 periph = NULL; 1975 xpt_unlock_buses(); 1976 1977 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg)); 1978 } 1979 1980 static int 1981 xptplistperiphfunc(struct cam_periph *periph, void *arg) 1982 { 1983 struct ccb_dev_match *cdm; 1984 dev_match_ret retval; 1985 1986 cdm = (struct ccb_dev_match *)arg; 1987 1988 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 1989 1990 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1991 cdm->status = CAM_DEV_MATCH_ERROR; 1992 return(0); 1993 } 1994 1995 /* 1996 * If the copy flag is set, copy this peripheral out. 1997 */ 1998 if (retval & DM_RET_COPY) { 1999 int spaceleft, j; 2000 2001 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2002 sizeof(struct dev_match_result)); 2003 2004 /* 2005 * If we don't have enough space to put in another 2006 * match result, save our position and tell the 2007 * user there are more devices to check. 2008 */ 2009 if (spaceleft < sizeof(struct dev_match_result)) { 2010 struct periph_driver **pdrv; 2011 2012 pdrv = NULL; 2013 bzero(&cdm->pos, sizeof(cdm->pos)); 2014 cdm->pos.position_type = 2015 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2016 CAM_DEV_POS_PERIPH; 2017 2018 /* 2019 * This may look a bit non-sensical, but it is 2020 * actually quite logical. There are very few 2021 * peripheral drivers, and bloating every peripheral 2022 * structure with a pointer back to its parent 2023 * peripheral driver linker set entry would cost 2024 * more in the long run than doing this quick lookup. 2025 */ 2026 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2027 if (strcmp((*pdrv)->driver_name, 2028 periph->periph_name) == 0) 2029 break; 2030 } 2031 2032 if (*pdrv == NULL) { 2033 cdm->status = CAM_DEV_MATCH_ERROR; 2034 return(0); 2035 } 2036 2037 cdm->pos.cookie.pdrv = pdrv; 2038 /* 2039 * The periph generation slot does double duty, as 2040 * does the periph pointer slot. They are used for 2041 * both edt and pdrv lookups and positioning. 2042 */ 2043 cdm->pos.cookie.periph = periph; 2044 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2045 (*pdrv)->generation; 2046 cdm->status = CAM_DEV_MATCH_MORE; 2047 return(0); 2048 } 2049 2050 j = cdm->num_matches; 2051 cdm->num_matches++; 2052 cdm->matches[j].type = DEV_MATCH_PERIPH; 2053 cdm->matches[j].result.periph_result.path_id = 2054 periph->path->bus->path_id; 2055 2056 /* 2057 * The transport layer peripheral doesn't have a target or 2058 * lun. 2059 */ 2060 if (periph->path->target) 2061 cdm->matches[j].result.periph_result.target_id = 2062 periph->path->target->target_id; 2063 else 2064 cdm->matches[j].result.periph_result.target_id = 2065 CAM_TARGET_WILDCARD; 2066 2067 if (periph->path->device) 2068 cdm->matches[j].result.periph_result.target_lun = 2069 periph->path->device->lun_id; 2070 else 2071 cdm->matches[j].result.periph_result.target_lun = 2072 CAM_LUN_WILDCARD; 2073 2074 cdm->matches[j].result.periph_result.unit_number = 2075 periph->unit_number; 2076 strncpy(cdm->matches[j].result.periph_result.periph_name, 2077 periph->periph_name, DEV_IDLEN); 2078 } 2079 2080 return(1); 2081 } 2082 2083 static int 2084 xptperiphlistmatch(struct ccb_dev_match *cdm) 2085 { 2086 int ret; 2087 2088 cdm->num_matches = 0; 2089 2090 /* 2091 * At this point in the edt traversal function, we check the bus 2092 * list generation to make sure that no buses have been added or 2093 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2094 * For the peripheral driver list traversal function, however, we 2095 * don't have to worry about new peripheral driver types coming or 2096 * going; they're in a linker set, and therefore can't change 2097 * without a recompile. 2098 */ 2099 2100 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2101 && (cdm->pos.cookie.pdrv != NULL)) 2102 ret = xptpdrvtraverse( 2103 (struct periph_driver **)cdm->pos.cookie.pdrv, 2104 xptplistpdrvfunc, cdm); 2105 else 2106 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2107 2108 /* 2109 * If we get back 0, that means that we had to stop before fully 2110 * traversing the peripheral driver tree. It also means that one of 2111 * the subroutines has set the status field to the proper value. If 2112 * we get back 1, we've fully traversed the EDT and copied out any 2113 * matching entries. 2114 */ 2115 if (ret == 1) 2116 cdm->status = CAM_DEV_MATCH_LAST; 2117 2118 return(ret); 2119 } 2120 2121 static int 2122 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2123 { 2124 struct cam_eb *bus, *next_bus; 2125 int retval; 2126 2127 retval = 1; 2128 if (start_bus) 2129 bus = start_bus; 2130 else { 2131 xpt_lock_buses(); 2132 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 2133 if (bus == NULL) { 2134 xpt_unlock_buses(); 2135 return (retval); 2136 } 2137 bus->refcount++; 2138 xpt_unlock_buses(); 2139 } 2140 for (; bus != NULL; bus = next_bus) { 2141 retval = tr_func(bus, arg); 2142 if (retval == 0) { 2143 xpt_release_bus(bus); 2144 break; 2145 } 2146 xpt_lock_buses(); 2147 next_bus = TAILQ_NEXT(bus, links); 2148 if (next_bus) 2149 next_bus->refcount++; 2150 xpt_unlock_buses(); 2151 xpt_release_bus(bus); 2152 } 2153 return(retval); 2154 } 2155 2156 static int 2157 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2158 xpt_targetfunc_t *tr_func, void *arg) 2159 { 2160 struct cam_et *target, *next_target; 2161 int retval; 2162 2163 retval = 1; 2164 if (start_target) 2165 target = start_target; 2166 else { 2167 mtx_lock(&bus->eb_mtx); 2168 target = TAILQ_FIRST(&bus->et_entries); 2169 if (target == NULL) { 2170 mtx_unlock(&bus->eb_mtx); 2171 return (retval); 2172 } 2173 target->refcount++; 2174 mtx_unlock(&bus->eb_mtx); 2175 } 2176 for (; target != NULL; target = next_target) { 2177 retval = tr_func(target, arg); 2178 if (retval == 0) { 2179 xpt_release_target(target); 2180 break; 2181 } 2182 mtx_lock(&bus->eb_mtx); 2183 next_target = TAILQ_NEXT(target, links); 2184 if (next_target) 2185 next_target->refcount++; 2186 mtx_unlock(&bus->eb_mtx); 2187 xpt_release_target(target); 2188 } 2189 return(retval); 2190 } 2191 2192 static int 2193 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2194 xpt_devicefunc_t *tr_func, void *arg) 2195 { 2196 struct cam_eb *bus; 2197 struct cam_ed *device, *next_device; 2198 int retval; 2199 2200 retval = 1; 2201 bus = target->bus; 2202 if (start_device) 2203 device = start_device; 2204 else { 2205 mtx_lock(&bus->eb_mtx); 2206 device = TAILQ_FIRST(&target->ed_entries); 2207 if (device == NULL) { 2208 mtx_unlock(&bus->eb_mtx); 2209 return (retval); 2210 } 2211 device->refcount++; 2212 mtx_unlock(&bus->eb_mtx); 2213 } 2214 for (; device != NULL; device = next_device) { 2215 mtx_lock(&device->device_mtx); 2216 retval = tr_func(device, arg); 2217 mtx_unlock(&device->device_mtx); 2218 if (retval == 0) { 2219 xpt_release_device(device); 2220 break; 2221 } 2222 mtx_lock(&bus->eb_mtx); 2223 next_device = TAILQ_NEXT(device, links); 2224 if (next_device) 2225 next_device->refcount++; 2226 mtx_unlock(&bus->eb_mtx); 2227 xpt_release_device(device); 2228 } 2229 return(retval); 2230 } 2231 2232 static int 2233 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2234 xpt_periphfunc_t *tr_func, void *arg) 2235 { 2236 struct cam_eb *bus; 2237 struct cam_periph *periph, *next_periph; 2238 int retval; 2239 2240 retval = 1; 2241 2242 bus = device->target->bus; 2243 if (start_periph) 2244 periph = start_periph; 2245 else { 2246 xpt_lock_buses(); 2247 mtx_lock(&bus->eb_mtx); 2248 periph = SLIST_FIRST(&device->periphs); 2249 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2250 periph = SLIST_NEXT(periph, periph_links); 2251 if (periph == NULL) { 2252 mtx_unlock(&bus->eb_mtx); 2253 xpt_unlock_buses(); 2254 return (retval); 2255 } 2256 periph->refcount++; 2257 mtx_unlock(&bus->eb_mtx); 2258 xpt_unlock_buses(); 2259 } 2260 for (; periph != NULL; periph = next_periph) { 2261 retval = tr_func(periph, arg); 2262 if (retval == 0) { 2263 cam_periph_release_locked(periph); 2264 break; 2265 } 2266 xpt_lock_buses(); 2267 mtx_lock(&bus->eb_mtx); 2268 next_periph = SLIST_NEXT(periph, periph_links); 2269 while (next_periph != NULL && 2270 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2271 next_periph = SLIST_NEXT(next_periph, periph_links); 2272 if (next_periph) 2273 next_periph->refcount++; 2274 mtx_unlock(&bus->eb_mtx); 2275 xpt_unlock_buses(); 2276 cam_periph_release_locked(periph); 2277 } 2278 return(retval); 2279 } 2280 2281 static int 2282 xptpdrvtraverse(struct periph_driver **start_pdrv, 2283 xpt_pdrvfunc_t *tr_func, void *arg) 2284 { 2285 struct periph_driver **pdrv; 2286 int retval; 2287 2288 retval = 1; 2289 2290 /* 2291 * We don't traverse the peripheral driver list like we do the 2292 * other lists, because it is a linker set, and therefore cannot be 2293 * changed during runtime. If the peripheral driver list is ever 2294 * re-done to be something other than a linker set (i.e. it can 2295 * change while the system is running), the list traversal should 2296 * be modified to work like the other traversal functions. 2297 */ 2298 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2299 *pdrv != NULL; pdrv++) { 2300 retval = tr_func(pdrv, arg); 2301 2302 if (retval == 0) 2303 return(retval); 2304 } 2305 2306 return(retval); 2307 } 2308 2309 static int 2310 xptpdperiphtraverse(struct periph_driver **pdrv, 2311 struct cam_periph *start_periph, 2312 xpt_periphfunc_t *tr_func, void *arg) 2313 { 2314 struct cam_periph *periph, *next_periph; 2315 int retval; 2316 2317 retval = 1; 2318 2319 if (start_periph) 2320 periph = start_periph; 2321 else { 2322 xpt_lock_buses(); 2323 periph = TAILQ_FIRST(&(*pdrv)->units); 2324 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0) 2325 periph = TAILQ_NEXT(periph, unit_links); 2326 if (periph == NULL) { 2327 xpt_unlock_buses(); 2328 return (retval); 2329 } 2330 periph->refcount++; 2331 xpt_unlock_buses(); 2332 } 2333 for (; periph != NULL; periph = next_periph) { 2334 cam_periph_lock(periph); 2335 retval = tr_func(periph, arg); 2336 cam_periph_unlock(periph); 2337 if (retval == 0) { 2338 cam_periph_release(periph); 2339 break; 2340 } 2341 xpt_lock_buses(); 2342 next_periph = TAILQ_NEXT(periph, unit_links); 2343 while (next_periph != NULL && 2344 (next_periph->flags & CAM_PERIPH_FREE) != 0) 2345 next_periph = TAILQ_NEXT(next_periph, unit_links); 2346 if (next_periph) 2347 next_periph->refcount++; 2348 xpt_unlock_buses(); 2349 cam_periph_release(periph); 2350 } 2351 return(retval); 2352 } 2353 2354 static int 2355 xptdefbusfunc(struct cam_eb *bus, void *arg) 2356 { 2357 struct xpt_traverse_config *tr_config; 2358 2359 tr_config = (struct xpt_traverse_config *)arg; 2360 2361 if (tr_config->depth == XPT_DEPTH_BUS) { 2362 xpt_busfunc_t *tr_func; 2363 2364 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2365 2366 return(tr_func(bus, tr_config->tr_arg)); 2367 } else 2368 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2369 } 2370 2371 static int 2372 xptdeftargetfunc(struct cam_et *target, void *arg) 2373 { 2374 struct xpt_traverse_config *tr_config; 2375 2376 tr_config = (struct xpt_traverse_config *)arg; 2377 2378 if (tr_config->depth == XPT_DEPTH_TARGET) { 2379 xpt_targetfunc_t *tr_func; 2380 2381 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2382 2383 return(tr_func(target, tr_config->tr_arg)); 2384 } else 2385 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2386 } 2387 2388 static int 2389 xptdefdevicefunc(struct cam_ed *device, void *arg) 2390 { 2391 struct xpt_traverse_config *tr_config; 2392 2393 tr_config = (struct xpt_traverse_config *)arg; 2394 2395 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2396 xpt_devicefunc_t *tr_func; 2397 2398 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2399 2400 return(tr_func(device, tr_config->tr_arg)); 2401 } else 2402 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2403 } 2404 2405 static int 2406 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2407 { 2408 struct xpt_traverse_config *tr_config; 2409 xpt_periphfunc_t *tr_func; 2410 2411 tr_config = (struct xpt_traverse_config *)arg; 2412 2413 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2414 2415 /* 2416 * Unlike the other default functions, we don't check for depth 2417 * here. The peripheral driver level is the last level in the EDT, 2418 * so if we're here, we should execute the function in question. 2419 */ 2420 return(tr_func(periph, tr_config->tr_arg)); 2421 } 2422 2423 /* 2424 * Execute the given function for every bus in the EDT. 2425 */ 2426 static int 2427 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2428 { 2429 struct xpt_traverse_config tr_config; 2430 2431 tr_config.depth = XPT_DEPTH_BUS; 2432 tr_config.tr_func = tr_func; 2433 tr_config.tr_arg = arg; 2434 2435 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2436 } 2437 2438 /* 2439 * Execute the given function for every device in the EDT. 2440 */ 2441 static int 2442 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2443 { 2444 struct xpt_traverse_config tr_config; 2445 2446 tr_config.depth = XPT_DEPTH_DEVICE; 2447 tr_config.tr_func = tr_func; 2448 tr_config.tr_arg = arg; 2449 2450 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2451 } 2452 2453 static int 2454 xptsetasyncfunc(struct cam_ed *device, void *arg) 2455 { 2456 struct cam_path path; 2457 struct ccb_getdev cgd; 2458 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2459 2460 /* 2461 * Don't report unconfigured devices (Wildcard devs, 2462 * devices only for target mode, device instances 2463 * that have been invalidated but are waiting for 2464 * their last reference count to be released). 2465 */ 2466 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2467 return (1); 2468 2469 xpt_compile_path(&path, 2470 NULL, 2471 device->target->bus->path_id, 2472 device->target->target_id, 2473 device->lun_id); 2474 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL); 2475 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2476 xpt_action((union ccb *)&cgd); 2477 csa->callback(csa->callback_arg, 2478 AC_FOUND_DEVICE, 2479 &path, &cgd); 2480 xpt_release_path(&path); 2481 2482 return(1); 2483 } 2484 2485 static int 2486 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2487 { 2488 struct cam_path path; 2489 struct ccb_pathinq cpi; 2490 struct ccb_setasync *csa = (struct ccb_setasync *)arg; 2491 2492 xpt_compile_path(&path, /*periph*/NULL, 2493 bus->path_id, 2494 CAM_TARGET_WILDCARD, 2495 CAM_LUN_WILDCARD); 2496 xpt_path_lock(&path); 2497 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL); 2498 cpi.ccb_h.func_code = XPT_PATH_INQ; 2499 xpt_action((union ccb *)&cpi); 2500 csa->callback(csa->callback_arg, 2501 AC_PATH_REGISTERED, 2502 &path, &cpi); 2503 xpt_path_unlock(&path); 2504 xpt_release_path(&path); 2505 2506 return(1); 2507 } 2508 2509 void 2510 xpt_action(union ccb *start_ccb) 2511 { 2512 2513 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, 2514 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code, 2515 xpt_action_name(start_ccb->ccb_h.func_code))); 2516 2517 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2518 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb); 2519 } 2520 2521 void 2522 xpt_action_default(union ccb *start_ccb) 2523 { 2524 struct cam_path *path; 2525 struct cam_sim *sim; 2526 int lock; 2527 2528 path = start_ccb->ccb_h.path; 2529 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2530 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code, 2531 xpt_action_name(start_ccb->ccb_h.func_code))); 2532 2533 switch (start_ccb->ccb_h.func_code) { 2534 case XPT_SCSI_IO: 2535 { 2536 struct cam_ed *device; 2537 2538 /* 2539 * For the sake of compatibility with SCSI-1 2540 * devices that may not understand the identify 2541 * message, we include lun information in the 2542 * second byte of all commands. SCSI-1 specifies 2543 * that luns are a 3 bit value and reserves only 3 2544 * bits for lun information in the CDB. Later 2545 * revisions of the SCSI spec allow for more than 8 2546 * luns, but have deprecated lun information in the 2547 * CDB. So, if the lun won't fit, we must omit. 2548 * 2549 * Also be aware that during initial probing for devices, 2550 * the inquiry information is unknown but initialized to 0. 2551 * This means that this code will be exercised while probing 2552 * devices with an ANSI revision greater than 2. 2553 */ 2554 device = path->device; 2555 if (device->protocol_version <= SCSI_REV_2 2556 && start_ccb->ccb_h.target_lun < 8 2557 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2558 2559 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2560 start_ccb->ccb_h.target_lun << 5; 2561 } 2562 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2563 } 2564 /* FALLTHROUGH */ 2565 case XPT_TARGET_IO: 2566 case XPT_CONT_TARGET_IO: 2567 start_ccb->csio.sense_resid = 0; 2568 start_ccb->csio.resid = 0; 2569 /* FALLTHROUGH */ 2570 case XPT_ATA_IO: 2571 if (start_ccb->ccb_h.func_code == XPT_ATA_IO) 2572 start_ccb->ataio.resid = 0; 2573 /* FALLTHROUGH */ 2574 case XPT_NVME_IO: 2575 if (start_ccb->ccb_h.func_code == XPT_NVME_IO) 2576 start_ccb->nvmeio.resid = 0; 2577 /* FALLTHROUGH */ 2578 case XPT_RESET_DEV: 2579 case XPT_ENG_EXEC: 2580 case XPT_SMP_IO: 2581 { 2582 struct cam_devq *devq; 2583 2584 devq = path->bus->sim->devq; 2585 mtx_lock(&devq->send_mtx); 2586 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2587 if (xpt_schedule_devq(devq, path->device) != 0) 2588 xpt_run_devq(devq); 2589 mtx_unlock(&devq->send_mtx); 2590 break; 2591 } 2592 case XPT_CALC_GEOMETRY: 2593 /* Filter out garbage */ 2594 if (start_ccb->ccg.block_size == 0 2595 || start_ccb->ccg.volume_size == 0) { 2596 start_ccb->ccg.cylinders = 0; 2597 start_ccb->ccg.heads = 0; 2598 start_ccb->ccg.secs_per_track = 0; 2599 start_ccb->ccb_h.status = CAM_REQ_CMP; 2600 break; 2601 } 2602 #if defined(__sparc64__) 2603 /* 2604 * For sparc64, we may need adjust the geometry of large 2605 * disks in order to fit the limitations of the 16-bit 2606 * fields of the VTOC8 disk label. 2607 */ 2608 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2609 start_ccb->ccb_h.status = CAM_REQ_CMP; 2610 break; 2611 } 2612 #endif 2613 goto call_sim; 2614 case XPT_ABORT: 2615 { 2616 union ccb* abort_ccb; 2617 2618 abort_ccb = start_ccb->cab.abort_ccb; 2619 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2620 struct cam_ed *device; 2621 struct cam_devq *devq; 2622 2623 device = abort_ccb->ccb_h.path->device; 2624 devq = device->sim->devq; 2625 2626 mtx_lock(&devq->send_mtx); 2627 if (abort_ccb->ccb_h.pinfo.index > 0) { 2628 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb); 2629 abort_ccb->ccb_h.status = 2630 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2631 xpt_freeze_devq_device(device, 1); 2632 mtx_unlock(&devq->send_mtx); 2633 xpt_done(abort_ccb); 2634 start_ccb->ccb_h.status = CAM_REQ_CMP; 2635 break; 2636 } 2637 mtx_unlock(&devq->send_mtx); 2638 2639 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2640 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2641 /* 2642 * We've caught this ccb en route to 2643 * the SIM. Flag it for abort and the 2644 * SIM will do so just before starting 2645 * real work on the CCB. 2646 */ 2647 abort_ccb->ccb_h.status = 2648 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2649 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2650 start_ccb->ccb_h.status = CAM_REQ_CMP; 2651 break; 2652 } 2653 } 2654 if (XPT_FC_IS_QUEUED(abort_ccb) 2655 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2656 /* 2657 * It's already completed but waiting 2658 * for our SWI to get to it. 2659 */ 2660 start_ccb->ccb_h.status = CAM_UA_ABORT; 2661 break; 2662 } 2663 /* 2664 * If we weren't able to take care of the abort request 2665 * in the XPT, pass the request down to the SIM for processing. 2666 */ 2667 } 2668 /* FALLTHROUGH */ 2669 case XPT_ACCEPT_TARGET_IO: 2670 case XPT_EN_LUN: 2671 case XPT_IMMED_NOTIFY: 2672 case XPT_NOTIFY_ACK: 2673 case XPT_RESET_BUS: 2674 case XPT_IMMEDIATE_NOTIFY: 2675 case XPT_NOTIFY_ACKNOWLEDGE: 2676 case XPT_GET_SIM_KNOB_OLD: 2677 case XPT_GET_SIM_KNOB: 2678 case XPT_SET_SIM_KNOB: 2679 case XPT_GET_TRAN_SETTINGS: 2680 case XPT_SET_TRAN_SETTINGS: 2681 case XPT_PATH_INQ: 2682 call_sim: 2683 sim = path->bus->sim; 2684 lock = (mtx_owned(sim->mtx) == 0); 2685 if (lock) 2686 CAM_SIM_LOCK(sim); 2687 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2688 ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code)); 2689 (*(sim->sim_action))(sim, start_ccb); 2690 CAM_DEBUG(path, CAM_DEBUG_TRACE, 2691 ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status)); 2692 if (lock) 2693 CAM_SIM_UNLOCK(sim); 2694 break; 2695 case XPT_PATH_STATS: 2696 start_ccb->cpis.last_reset = path->bus->last_reset; 2697 start_ccb->ccb_h.status = CAM_REQ_CMP; 2698 break; 2699 case XPT_GDEV_TYPE: 2700 { 2701 struct cam_ed *dev; 2702 2703 dev = path->device; 2704 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2705 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2706 } else { 2707 struct ccb_getdev *cgd; 2708 2709 cgd = &start_ccb->cgd; 2710 cgd->protocol = dev->protocol; 2711 cgd->inq_data = dev->inq_data; 2712 cgd->ident_data = dev->ident_data; 2713 cgd->inq_flags = dev->inq_flags; 2714 cgd->nvme_data = dev->nvme_data; 2715 cgd->nvme_cdata = dev->nvme_cdata; 2716 cgd->ccb_h.status = CAM_REQ_CMP; 2717 cgd->serial_num_len = dev->serial_num_len; 2718 if ((dev->serial_num_len > 0) 2719 && (dev->serial_num != NULL)) 2720 bcopy(dev->serial_num, cgd->serial_num, 2721 dev->serial_num_len); 2722 } 2723 break; 2724 } 2725 case XPT_GDEV_STATS: 2726 { 2727 struct cam_ed *dev; 2728 2729 dev = path->device; 2730 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2731 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2732 } else { 2733 struct ccb_getdevstats *cgds; 2734 struct cam_eb *bus; 2735 struct cam_et *tar; 2736 struct cam_devq *devq; 2737 2738 cgds = &start_ccb->cgds; 2739 bus = path->bus; 2740 tar = path->target; 2741 devq = bus->sim->devq; 2742 mtx_lock(&devq->send_mtx); 2743 cgds->dev_openings = dev->ccbq.dev_openings; 2744 cgds->dev_active = dev->ccbq.dev_active; 2745 cgds->allocated = dev->ccbq.allocated; 2746 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq); 2747 cgds->held = cgds->allocated - cgds->dev_active - 2748 cgds->queued; 2749 cgds->last_reset = tar->last_reset; 2750 cgds->maxtags = dev->maxtags; 2751 cgds->mintags = dev->mintags; 2752 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2753 cgds->last_reset = bus->last_reset; 2754 mtx_unlock(&devq->send_mtx); 2755 cgds->ccb_h.status = CAM_REQ_CMP; 2756 } 2757 break; 2758 } 2759 case XPT_GDEVLIST: 2760 { 2761 struct cam_periph *nperiph; 2762 struct periph_list *periph_head; 2763 struct ccb_getdevlist *cgdl; 2764 u_int i; 2765 struct cam_ed *device; 2766 int found; 2767 2768 2769 found = 0; 2770 2771 /* 2772 * Don't want anyone mucking with our data. 2773 */ 2774 device = path->device; 2775 periph_head = &device->periphs; 2776 cgdl = &start_ccb->cgdl; 2777 2778 /* 2779 * Check and see if the list has changed since the user 2780 * last requested a list member. If so, tell them that the 2781 * list has changed, and therefore they need to start over 2782 * from the beginning. 2783 */ 2784 if ((cgdl->index != 0) && 2785 (cgdl->generation != device->generation)) { 2786 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2787 break; 2788 } 2789 2790 /* 2791 * Traverse the list of peripherals and attempt to find 2792 * the requested peripheral. 2793 */ 2794 for (nperiph = SLIST_FIRST(periph_head), i = 0; 2795 (nperiph != NULL) && (i <= cgdl->index); 2796 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 2797 if (i == cgdl->index) { 2798 strncpy(cgdl->periph_name, 2799 nperiph->periph_name, 2800 DEV_IDLEN); 2801 cgdl->unit_number = nperiph->unit_number; 2802 found = 1; 2803 } 2804 } 2805 if (found == 0) { 2806 cgdl->status = CAM_GDEVLIST_ERROR; 2807 break; 2808 } 2809 2810 if (nperiph == NULL) 2811 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2812 else 2813 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2814 2815 cgdl->index++; 2816 cgdl->generation = device->generation; 2817 2818 cgdl->ccb_h.status = CAM_REQ_CMP; 2819 break; 2820 } 2821 case XPT_DEV_MATCH: 2822 { 2823 dev_pos_type position_type; 2824 struct ccb_dev_match *cdm; 2825 2826 cdm = &start_ccb->cdm; 2827 2828 /* 2829 * There are two ways of getting at information in the EDT. 2830 * The first way is via the primary EDT tree. It starts 2831 * with a list of buses, then a list of targets on a bus, 2832 * then devices/luns on a target, and then peripherals on a 2833 * device/lun. The "other" way is by the peripheral driver 2834 * lists. The peripheral driver lists are organized by 2835 * peripheral driver. (obviously) So it makes sense to 2836 * use the peripheral driver list if the user is looking 2837 * for something like "da1", or all "da" devices. If the 2838 * user is looking for something on a particular bus/target 2839 * or lun, it's generally better to go through the EDT tree. 2840 */ 2841 2842 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2843 position_type = cdm->pos.position_type; 2844 else { 2845 u_int i; 2846 2847 position_type = CAM_DEV_POS_NONE; 2848 2849 for (i = 0; i < cdm->num_patterns; i++) { 2850 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2851 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2852 position_type = CAM_DEV_POS_EDT; 2853 break; 2854 } 2855 } 2856 2857 if (cdm->num_patterns == 0) 2858 position_type = CAM_DEV_POS_EDT; 2859 else if (position_type == CAM_DEV_POS_NONE) 2860 position_type = CAM_DEV_POS_PDRV; 2861 } 2862 2863 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2864 case CAM_DEV_POS_EDT: 2865 xptedtmatch(cdm); 2866 break; 2867 case CAM_DEV_POS_PDRV: 2868 xptperiphlistmatch(cdm); 2869 break; 2870 default: 2871 cdm->status = CAM_DEV_MATCH_ERROR; 2872 break; 2873 } 2874 2875 if (cdm->status == CAM_DEV_MATCH_ERROR) 2876 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2877 else 2878 start_ccb->ccb_h.status = CAM_REQ_CMP; 2879 2880 break; 2881 } 2882 case XPT_SASYNC_CB: 2883 { 2884 struct ccb_setasync *csa; 2885 struct async_node *cur_entry; 2886 struct async_list *async_head; 2887 u_int32_t added; 2888 2889 csa = &start_ccb->csa; 2890 added = csa->event_enable; 2891 async_head = &path->device->asyncs; 2892 2893 /* 2894 * If there is already an entry for us, simply 2895 * update it. 2896 */ 2897 cur_entry = SLIST_FIRST(async_head); 2898 while (cur_entry != NULL) { 2899 if ((cur_entry->callback_arg == csa->callback_arg) 2900 && (cur_entry->callback == csa->callback)) 2901 break; 2902 cur_entry = SLIST_NEXT(cur_entry, links); 2903 } 2904 2905 if (cur_entry != NULL) { 2906 /* 2907 * If the request has no flags set, 2908 * remove the entry. 2909 */ 2910 added &= ~cur_entry->event_enable; 2911 if (csa->event_enable == 0) { 2912 SLIST_REMOVE(async_head, cur_entry, 2913 async_node, links); 2914 xpt_release_device(path->device); 2915 free(cur_entry, M_CAMXPT); 2916 } else { 2917 cur_entry->event_enable = csa->event_enable; 2918 } 2919 csa->event_enable = added; 2920 } else { 2921 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT, 2922 M_NOWAIT); 2923 if (cur_entry == NULL) { 2924 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 2925 break; 2926 } 2927 cur_entry->event_enable = csa->event_enable; 2928 cur_entry->event_lock = 2929 mtx_owned(path->bus->sim->mtx) ? 1 : 0; 2930 cur_entry->callback_arg = csa->callback_arg; 2931 cur_entry->callback = csa->callback; 2932 SLIST_INSERT_HEAD(async_head, cur_entry, links); 2933 xpt_acquire_device(path->device); 2934 } 2935 start_ccb->ccb_h.status = CAM_REQ_CMP; 2936 break; 2937 } 2938 case XPT_REL_SIMQ: 2939 { 2940 struct ccb_relsim *crs; 2941 struct cam_ed *dev; 2942 2943 crs = &start_ccb->crs; 2944 dev = path->device; 2945 if (dev == NULL) { 2946 2947 crs->ccb_h.status = CAM_DEV_NOT_THERE; 2948 break; 2949 } 2950 2951 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 2952 2953 /* Don't ever go below one opening */ 2954 if (crs->openings > 0) { 2955 xpt_dev_ccbq_resize(path, crs->openings); 2956 if (bootverbose) { 2957 xpt_print(path, 2958 "number of openings is now %d\n", 2959 crs->openings); 2960 } 2961 } 2962 } 2963 2964 mtx_lock(&dev->sim->devq->send_mtx); 2965 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 2966 2967 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 2968 2969 /* 2970 * Just extend the old timeout and decrement 2971 * the freeze count so that a single timeout 2972 * is sufficient for releasing the queue. 2973 */ 2974 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2975 callout_stop(&dev->callout); 2976 } else { 2977 2978 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 2979 } 2980 2981 callout_reset_sbt(&dev->callout, 2982 SBT_1MS * crs->release_timeout, 0, 2983 xpt_release_devq_timeout, dev, 0); 2984 2985 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 2986 2987 } 2988 2989 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 2990 2991 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 2992 /* 2993 * Decrement the freeze count so that a single 2994 * completion is still sufficient to unfreeze 2995 * the queue. 2996 */ 2997 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 2998 } else { 2999 3000 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3001 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3002 } 3003 } 3004 3005 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3006 3007 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3008 || (dev->ccbq.dev_active == 0)) { 3009 3010 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3011 } else { 3012 3013 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3014 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3015 } 3016 } 3017 mtx_unlock(&dev->sim->devq->send_mtx); 3018 3019 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) 3020 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE); 3021 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt; 3022 start_ccb->ccb_h.status = CAM_REQ_CMP; 3023 break; 3024 } 3025 case XPT_DEBUG: { 3026 struct cam_path *oldpath; 3027 3028 /* Check that all request bits are supported. */ 3029 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) { 3030 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3031 break; 3032 } 3033 3034 cam_dflags = CAM_DEBUG_NONE; 3035 if (cam_dpath != NULL) { 3036 oldpath = cam_dpath; 3037 cam_dpath = NULL; 3038 xpt_free_path(oldpath); 3039 } 3040 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) { 3041 if (xpt_create_path(&cam_dpath, NULL, 3042 start_ccb->ccb_h.path_id, 3043 start_ccb->ccb_h.target_id, 3044 start_ccb->ccb_h.target_lun) != 3045 CAM_REQ_CMP) { 3046 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3047 } else { 3048 cam_dflags = start_ccb->cdbg.flags; 3049 start_ccb->ccb_h.status = CAM_REQ_CMP; 3050 xpt_print(cam_dpath, "debugging flags now %x\n", 3051 cam_dflags); 3052 } 3053 } else 3054 start_ccb->ccb_h.status = CAM_REQ_CMP; 3055 break; 3056 } 3057 case XPT_NOOP: 3058 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3059 xpt_freeze_devq(path, 1); 3060 start_ccb->ccb_h.status = CAM_REQ_CMP; 3061 break; 3062 case XPT_REPROBE_LUN: 3063 xpt_async(AC_INQ_CHANGED, path, NULL); 3064 start_ccb->ccb_h.status = CAM_REQ_CMP; 3065 xpt_done(start_ccb); 3066 break; 3067 default: 3068 case XPT_SDEV_TYPE: 3069 case XPT_TERM_IO: 3070 case XPT_ENG_INQ: 3071 /* XXX Implement */ 3072 xpt_print(start_ccb->ccb_h.path, 3073 "%s: CCB type %#x %s not supported\n", __func__, 3074 start_ccb->ccb_h.func_code, 3075 xpt_action_name(start_ccb->ccb_h.func_code)); 3076 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3077 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) { 3078 xpt_done(start_ccb); 3079 } 3080 break; 3081 } 3082 CAM_DEBUG(path, CAM_DEBUG_TRACE, 3083 ("xpt_action_default: func= %#x %s status %#x\n", 3084 start_ccb->ccb_h.func_code, 3085 xpt_action_name(start_ccb->ccb_h.func_code), 3086 start_ccb->ccb_h.status)); 3087 } 3088 3089 void 3090 xpt_polled_action(union ccb *start_ccb) 3091 { 3092 u_int32_t timeout; 3093 struct cam_sim *sim; 3094 struct cam_devq *devq; 3095 struct cam_ed *dev; 3096 3097 timeout = start_ccb->ccb_h.timeout * 10; 3098 sim = start_ccb->ccb_h.path->bus->sim; 3099 devq = sim->devq; 3100 dev = start_ccb->ccb_h.path->device; 3101 3102 mtx_unlock(&dev->device_mtx); 3103 3104 /* 3105 * Steal an opening so that no other queued requests 3106 * can get it before us while we simulate interrupts. 3107 */ 3108 mtx_lock(&devq->send_mtx); 3109 dev->ccbq.dev_openings--; 3110 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) && 3111 (--timeout > 0)) { 3112 mtx_unlock(&devq->send_mtx); 3113 DELAY(100); 3114 CAM_SIM_LOCK(sim); 3115 (*(sim->sim_poll))(sim); 3116 CAM_SIM_UNLOCK(sim); 3117 camisr_runqueue(); 3118 mtx_lock(&devq->send_mtx); 3119 } 3120 dev->ccbq.dev_openings++; 3121 mtx_unlock(&devq->send_mtx); 3122 3123 if (timeout != 0) { 3124 xpt_action(start_ccb); 3125 while(--timeout > 0) { 3126 CAM_SIM_LOCK(sim); 3127 (*(sim->sim_poll))(sim); 3128 CAM_SIM_UNLOCK(sim); 3129 camisr_runqueue(); 3130 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3131 != CAM_REQ_INPROG) 3132 break; 3133 DELAY(100); 3134 } 3135 if (timeout == 0) { 3136 /* 3137 * XXX Is it worth adding a sim_timeout entry 3138 * point so we can attempt recovery? If 3139 * this is only used for dumps, I don't think 3140 * it is. 3141 */ 3142 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3143 } 3144 } else { 3145 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3146 } 3147 3148 mtx_lock(&dev->device_mtx); 3149 } 3150 3151 /* 3152 * Schedule a peripheral driver to receive a ccb when its 3153 * target device has space for more transactions. 3154 */ 3155 void 3156 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority) 3157 { 3158 3159 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3160 cam_periph_assert(periph, MA_OWNED); 3161 if (new_priority < periph->scheduled_priority) { 3162 periph->scheduled_priority = new_priority; 3163 xpt_run_allocq(periph, 0); 3164 } 3165 } 3166 3167 3168 /* 3169 * Schedule a device to run on a given queue. 3170 * If the device was inserted as a new entry on the queue, 3171 * return 1 meaning the device queue should be run. If we 3172 * were already queued, implying someone else has already 3173 * started the queue, return 0 so the caller doesn't attempt 3174 * to run the queue. 3175 */ 3176 static int 3177 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3178 u_int32_t new_priority) 3179 { 3180 int retval; 3181 u_int32_t old_priority; 3182 3183 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3184 3185 old_priority = pinfo->priority; 3186 3187 /* 3188 * Are we already queued? 3189 */ 3190 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3191 /* Simply reorder based on new priority */ 3192 if (new_priority < old_priority) { 3193 camq_change_priority(queue, pinfo->index, 3194 new_priority); 3195 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3196 ("changed priority to %d\n", 3197 new_priority)); 3198 retval = 1; 3199 } else 3200 retval = 0; 3201 } else { 3202 /* New entry on the queue */ 3203 if (new_priority < old_priority) 3204 pinfo->priority = new_priority; 3205 3206 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3207 ("Inserting onto queue\n")); 3208 pinfo->generation = ++queue->generation; 3209 camq_insert(queue, pinfo); 3210 retval = 1; 3211 } 3212 return (retval); 3213 } 3214 3215 static void 3216 xpt_run_allocq_task(void *context, int pending) 3217 { 3218 struct cam_periph *periph = context; 3219 3220 cam_periph_lock(periph); 3221 periph->flags &= ~CAM_PERIPH_RUN_TASK; 3222 xpt_run_allocq(periph, 1); 3223 cam_periph_unlock(periph); 3224 cam_periph_release(periph); 3225 } 3226 3227 static void 3228 xpt_run_allocq(struct cam_periph *periph, int sleep) 3229 { 3230 struct cam_ed *device; 3231 union ccb *ccb; 3232 uint32_t prio; 3233 3234 cam_periph_assert(periph, MA_OWNED); 3235 if (periph->periph_allocating) 3236 return; 3237 periph->periph_allocating = 1; 3238 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph)); 3239 device = periph->path->device; 3240 ccb = NULL; 3241 restart: 3242 while ((prio = min(periph->scheduled_priority, 3243 periph->immediate_priority)) != CAM_PRIORITY_NONE && 3244 (periph->periph_allocated - (ccb != NULL ? 1 : 0) < 3245 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) { 3246 3247 if (ccb == NULL && 3248 (ccb = xpt_get_ccb_nowait(periph)) == NULL) { 3249 if (sleep) { 3250 ccb = xpt_get_ccb(periph); 3251 goto restart; 3252 } 3253 if (periph->flags & CAM_PERIPH_RUN_TASK) 3254 break; 3255 cam_periph_doacquire(periph); 3256 periph->flags |= CAM_PERIPH_RUN_TASK; 3257 taskqueue_enqueue(xsoftc.xpt_taskq, 3258 &periph->periph_run_task); 3259 break; 3260 } 3261 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio); 3262 if (prio == periph->immediate_priority) { 3263 periph->immediate_priority = CAM_PRIORITY_NONE; 3264 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3265 ("waking cam_periph_getccb()\n")); 3266 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h, 3267 periph_links.sle); 3268 wakeup(&periph->ccb_list); 3269 } else { 3270 periph->scheduled_priority = CAM_PRIORITY_NONE; 3271 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3272 ("calling periph_start()\n")); 3273 periph->periph_start(periph, ccb); 3274 } 3275 ccb = NULL; 3276 } 3277 if (ccb != NULL) 3278 xpt_release_ccb(ccb); 3279 periph->periph_allocating = 0; 3280 } 3281 3282 static void 3283 xpt_run_devq(struct cam_devq *devq) 3284 { 3285 int lock; 3286 3287 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n")); 3288 3289 devq->send_queue.qfrozen_cnt++; 3290 while ((devq->send_queue.entries > 0) 3291 && (devq->send_openings > 0) 3292 && (devq->send_queue.qfrozen_cnt <= 1)) { 3293 struct cam_ed *device; 3294 union ccb *work_ccb; 3295 struct cam_sim *sim; 3296 struct xpt_proto *proto; 3297 3298 device = (struct cam_ed *)camq_remove(&devq->send_queue, 3299 CAMQ_HEAD); 3300 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3301 ("running device %p\n", device)); 3302 3303 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3304 if (work_ccb == NULL) { 3305 printf("device on run queue with no ccbs???\n"); 3306 continue; 3307 } 3308 3309 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3310 3311 mtx_lock(&xsoftc.xpt_highpower_lock); 3312 if (xsoftc.num_highpower <= 0) { 3313 /* 3314 * We got a high power command, but we 3315 * don't have any available slots. Freeze 3316 * the device queue until we have a slot 3317 * available. 3318 */ 3319 xpt_freeze_devq_device(device, 1); 3320 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device, 3321 highpowerq_entry); 3322 3323 mtx_unlock(&xsoftc.xpt_highpower_lock); 3324 continue; 3325 } else { 3326 /* 3327 * Consume a high power slot while 3328 * this ccb runs. 3329 */ 3330 xsoftc.num_highpower--; 3331 } 3332 mtx_unlock(&xsoftc.xpt_highpower_lock); 3333 } 3334 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3335 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3336 devq->send_openings--; 3337 devq->send_active++; 3338 xpt_schedule_devq(devq, device); 3339 mtx_unlock(&devq->send_mtx); 3340 3341 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) { 3342 /* 3343 * The client wants to freeze the queue 3344 * after this CCB is sent. 3345 */ 3346 xpt_freeze_devq(work_ccb->ccb_h.path, 1); 3347 } 3348 3349 /* In Target mode, the peripheral driver knows best... */ 3350 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3351 if ((device->inq_flags & SID_CmdQue) != 0 3352 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3353 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3354 else 3355 /* 3356 * Clear this in case of a retried CCB that 3357 * failed due to a rejected tag. 3358 */ 3359 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3360 } 3361 3362 KASSERT(device == work_ccb->ccb_h.path->device, 3363 ("device (%p) / path->device (%p) mismatch", 3364 device, work_ccb->ccb_h.path->device)); 3365 proto = xpt_proto_find(device->protocol); 3366 if (proto && proto->ops->debug_out) 3367 proto->ops->debug_out(work_ccb); 3368 3369 /* 3370 * Device queues can be shared among multiple SIM instances 3371 * that reside on different buses. Use the SIM from the 3372 * queued device, rather than the one from the calling bus. 3373 */ 3374 sim = device->sim; 3375 lock = (mtx_owned(sim->mtx) == 0); 3376 if (lock) 3377 CAM_SIM_LOCK(sim); 3378 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms 3379 (*(sim->sim_action))(sim, work_ccb); 3380 if (lock) 3381 CAM_SIM_UNLOCK(sim); 3382 mtx_lock(&devq->send_mtx); 3383 } 3384 devq->send_queue.qfrozen_cnt--; 3385 } 3386 3387 /* 3388 * This function merges stuff from the slave ccb into the master ccb, while 3389 * keeping important fields in the master ccb constant. 3390 */ 3391 void 3392 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3393 { 3394 3395 /* 3396 * Pull fields that are valid for peripheral drivers to set 3397 * into the master CCB along with the CCB "payload". 3398 */ 3399 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3400 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3401 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3402 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3403 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3404 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3405 } 3406 3407 void 3408 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path, 3409 u_int32_t priority, u_int32_t flags) 3410 { 3411 3412 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3413 ccb_h->pinfo.priority = priority; 3414 ccb_h->path = path; 3415 ccb_h->path_id = path->bus->path_id; 3416 if (path->target) 3417 ccb_h->target_id = path->target->target_id; 3418 else 3419 ccb_h->target_id = CAM_TARGET_WILDCARD; 3420 if (path->device) { 3421 ccb_h->target_lun = path->device->lun_id; 3422 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3423 } else { 3424 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3425 } 3426 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3427 ccb_h->flags = flags; 3428 ccb_h->xflags = 0; 3429 } 3430 3431 void 3432 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3433 { 3434 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0); 3435 } 3436 3437 /* Path manipulation functions */ 3438 cam_status 3439 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3440 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3441 { 3442 struct cam_path *path; 3443 cam_status status; 3444 3445 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3446 3447 if (path == NULL) { 3448 status = CAM_RESRC_UNAVAIL; 3449 return(status); 3450 } 3451 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3452 if (status != CAM_REQ_CMP) { 3453 free(path, M_CAMPATH); 3454 path = NULL; 3455 } 3456 *new_path_ptr = path; 3457 return (status); 3458 } 3459 3460 cam_status 3461 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3462 struct cam_periph *periph, path_id_t path_id, 3463 target_id_t target_id, lun_id_t lun_id) 3464 { 3465 3466 return (xpt_create_path(new_path_ptr, periph, path_id, target_id, 3467 lun_id)); 3468 } 3469 3470 cam_status 3471 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3472 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3473 { 3474 struct cam_eb *bus; 3475 struct cam_et *target; 3476 struct cam_ed *device; 3477 cam_status status; 3478 3479 status = CAM_REQ_CMP; /* Completed without error */ 3480 target = NULL; /* Wildcarded */ 3481 device = NULL; /* Wildcarded */ 3482 3483 /* 3484 * We will potentially modify the EDT, so block interrupts 3485 * that may attempt to create cam paths. 3486 */ 3487 bus = xpt_find_bus(path_id); 3488 if (bus == NULL) { 3489 status = CAM_PATH_INVALID; 3490 } else { 3491 xpt_lock_buses(); 3492 mtx_lock(&bus->eb_mtx); 3493 target = xpt_find_target(bus, target_id); 3494 if (target == NULL) { 3495 /* Create one */ 3496 struct cam_et *new_target; 3497 3498 new_target = xpt_alloc_target(bus, target_id); 3499 if (new_target == NULL) { 3500 status = CAM_RESRC_UNAVAIL; 3501 } else { 3502 target = new_target; 3503 } 3504 } 3505 xpt_unlock_buses(); 3506 if (target != NULL) { 3507 device = xpt_find_device(target, lun_id); 3508 if (device == NULL) { 3509 /* Create one */ 3510 struct cam_ed *new_device; 3511 3512 new_device = 3513 (*(bus->xport->ops->alloc_device))(bus, 3514 target, 3515 lun_id); 3516 if (new_device == NULL) { 3517 status = CAM_RESRC_UNAVAIL; 3518 } else { 3519 device = new_device; 3520 } 3521 } 3522 } 3523 mtx_unlock(&bus->eb_mtx); 3524 } 3525 3526 /* 3527 * Only touch the user's data if we are successful. 3528 */ 3529 if (status == CAM_REQ_CMP) { 3530 new_path->periph = perph; 3531 new_path->bus = bus; 3532 new_path->target = target; 3533 new_path->device = device; 3534 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3535 } else { 3536 if (device != NULL) 3537 xpt_release_device(device); 3538 if (target != NULL) 3539 xpt_release_target(target); 3540 if (bus != NULL) 3541 xpt_release_bus(bus); 3542 } 3543 return (status); 3544 } 3545 3546 cam_status 3547 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path) 3548 { 3549 struct cam_path *new_path; 3550 3551 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT); 3552 if (new_path == NULL) 3553 return(CAM_RESRC_UNAVAIL); 3554 xpt_copy_path(new_path, path); 3555 *new_path_ptr = new_path; 3556 return (CAM_REQ_CMP); 3557 } 3558 3559 void 3560 xpt_copy_path(struct cam_path *new_path, struct cam_path *path) 3561 { 3562 3563 *new_path = *path; 3564 if (path->bus != NULL) 3565 xpt_acquire_bus(path->bus); 3566 if (path->target != NULL) 3567 xpt_acquire_target(path->target); 3568 if (path->device != NULL) 3569 xpt_acquire_device(path->device); 3570 } 3571 3572 void 3573 xpt_release_path(struct cam_path *path) 3574 { 3575 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3576 if (path->device != NULL) { 3577 xpt_release_device(path->device); 3578 path->device = NULL; 3579 } 3580 if (path->target != NULL) { 3581 xpt_release_target(path->target); 3582 path->target = NULL; 3583 } 3584 if (path->bus != NULL) { 3585 xpt_release_bus(path->bus); 3586 path->bus = NULL; 3587 } 3588 } 3589 3590 void 3591 xpt_free_path(struct cam_path *path) 3592 { 3593 3594 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3595 xpt_release_path(path); 3596 free(path, M_CAMPATH); 3597 } 3598 3599 void 3600 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 3601 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref) 3602 { 3603 3604 xpt_lock_buses(); 3605 if (bus_ref) { 3606 if (path->bus) 3607 *bus_ref = path->bus->refcount; 3608 else 3609 *bus_ref = 0; 3610 } 3611 if (periph_ref) { 3612 if (path->periph) 3613 *periph_ref = path->periph->refcount; 3614 else 3615 *periph_ref = 0; 3616 } 3617 xpt_unlock_buses(); 3618 if (target_ref) { 3619 if (path->target) 3620 *target_ref = path->target->refcount; 3621 else 3622 *target_ref = 0; 3623 } 3624 if (device_ref) { 3625 if (path->device) 3626 *device_ref = path->device->refcount; 3627 else 3628 *device_ref = 0; 3629 } 3630 } 3631 3632 /* 3633 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3634 * in path1, 2 for match with wildcards in path2. 3635 */ 3636 int 3637 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3638 { 3639 int retval = 0; 3640 3641 if (path1->bus != path2->bus) { 3642 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3643 retval = 1; 3644 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3645 retval = 2; 3646 else 3647 return (-1); 3648 } 3649 if (path1->target != path2->target) { 3650 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3651 if (retval == 0) 3652 retval = 1; 3653 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3654 retval = 2; 3655 else 3656 return (-1); 3657 } 3658 if (path1->device != path2->device) { 3659 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3660 if (retval == 0) 3661 retval = 1; 3662 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3663 retval = 2; 3664 else 3665 return (-1); 3666 } 3667 return (retval); 3668 } 3669 3670 int 3671 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev) 3672 { 3673 int retval = 0; 3674 3675 if (path->bus != dev->target->bus) { 3676 if (path->bus->path_id == CAM_BUS_WILDCARD) 3677 retval = 1; 3678 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD) 3679 retval = 2; 3680 else 3681 return (-1); 3682 } 3683 if (path->target != dev->target) { 3684 if (path->target->target_id == CAM_TARGET_WILDCARD) { 3685 if (retval == 0) 3686 retval = 1; 3687 } else if (dev->target->target_id == CAM_TARGET_WILDCARD) 3688 retval = 2; 3689 else 3690 return (-1); 3691 } 3692 if (path->device != dev) { 3693 if (path->device->lun_id == CAM_LUN_WILDCARD) { 3694 if (retval == 0) 3695 retval = 1; 3696 } else if (dev->lun_id == CAM_LUN_WILDCARD) 3697 retval = 2; 3698 else 3699 return (-1); 3700 } 3701 return (retval); 3702 } 3703 3704 void 3705 xpt_print_path(struct cam_path *path) 3706 { 3707 struct sbuf sb; 3708 char buffer[XPT_PRINT_LEN]; 3709 3710 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3711 xpt_path_sbuf(path, &sb); 3712 sbuf_finish(&sb); 3713 printf("%s", sbuf_data(&sb)); 3714 sbuf_delete(&sb); 3715 } 3716 3717 void 3718 xpt_print_device(struct cam_ed *device) 3719 { 3720 3721 if (device == NULL) 3722 printf("(nopath): "); 3723 else { 3724 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name, 3725 device->sim->unit_number, 3726 device->sim->bus_id, 3727 device->target->target_id, 3728 (uintmax_t)device->lun_id); 3729 } 3730 } 3731 3732 void 3733 xpt_print(struct cam_path *path, const char *fmt, ...) 3734 { 3735 va_list ap; 3736 struct sbuf sb; 3737 char buffer[XPT_PRINT_LEN]; 3738 3739 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN); 3740 3741 xpt_path_sbuf(path, &sb); 3742 va_start(ap, fmt); 3743 sbuf_vprintf(&sb, fmt, ap); 3744 va_end(ap); 3745 3746 sbuf_finish(&sb); 3747 printf("%s", sbuf_data(&sb)); 3748 sbuf_delete(&sb); 3749 } 3750 3751 int 3752 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 3753 { 3754 struct sbuf sb; 3755 int len; 3756 3757 sbuf_new(&sb, str, str_len, 0); 3758 len = xpt_path_sbuf(path, &sb); 3759 sbuf_finish(&sb); 3760 return (len); 3761 } 3762 3763 int 3764 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb) 3765 { 3766 3767 if (path == NULL) 3768 sbuf_printf(sb, "(nopath): "); 3769 else { 3770 if (path->periph != NULL) 3771 sbuf_printf(sb, "(%s%d:", path->periph->periph_name, 3772 path->periph->unit_number); 3773 else 3774 sbuf_printf(sb, "(noperiph:"); 3775 3776 if (path->bus != NULL) 3777 sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name, 3778 path->bus->sim->unit_number, 3779 path->bus->sim->bus_id); 3780 else 3781 sbuf_printf(sb, "nobus:"); 3782 3783 if (path->target != NULL) 3784 sbuf_printf(sb, "%d:", path->target->target_id); 3785 else 3786 sbuf_printf(sb, "X:"); 3787 3788 if (path->device != NULL) 3789 sbuf_printf(sb, "%jx): ", 3790 (uintmax_t)path->device->lun_id); 3791 else 3792 sbuf_printf(sb, "X): "); 3793 } 3794 3795 return(sbuf_len(sb)); 3796 } 3797 3798 path_id_t 3799 xpt_path_path_id(struct cam_path *path) 3800 { 3801 return(path->bus->path_id); 3802 } 3803 3804 target_id_t 3805 xpt_path_target_id(struct cam_path *path) 3806 { 3807 if (path->target != NULL) 3808 return (path->target->target_id); 3809 else 3810 return (CAM_TARGET_WILDCARD); 3811 } 3812 3813 lun_id_t 3814 xpt_path_lun_id(struct cam_path *path) 3815 { 3816 if (path->device != NULL) 3817 return (path->device->lun_id); 3818 else 3819 return (CAM_LUN_WILDCARD); 3820 } 3821 3822 struct cam_sim * 3823 xpt_path_sim(struct cam_path *path) 3824 { 3825 3826 return (path->bus->sim); 3827 } 3828 3829 struct cam_periph* 3830 xpt_path_periph(struct cam_path *path) 3831 { 3832 3833 return (path->periph); 3834 } 3835 3836 /* 3837 * Release a CAM control block for the caller. Remit the cost of the structure 3838 * to the device referenced by the path. If the this device had no 'credits' 3839 * and peripheral drivers have registered async callbacks for this notification 3840 * call them now. 3841 */ 3842 void 3843 xpt_release_ccb(union ccb *free_ccb) 3844 { 3845 struct cam_ed *device; 3846 struct cam_periph *periph; 3847 3848 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3849 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED); 3850 device = free_ccb->ccb_h.path->device; 3851 periph = free_ccb->ccb_h.path->periph; 3852 3853 xpt_free_ccb(free_ccb); 3854 periph->periph_allocated--; 3855 cam_ccbq_release_opening(&device->ccbq); 3856 xpt_run_allocq(periph, 0); 3857 } 3858 3859 /* Functions accessed by SIM drivers */ 3860 3861 static struct xpt_xport_ops xport_default_ops = { 3862 .alloc_device = xpt_alloc_device_default, 3863 .action = xpt_action_default, 3864 .async = xpt_dev_async_default, 3865 }; 3866 static struct xpt_xport xport_default = { 3867 .xport = XPORT_UNKNOWN, 3868 .name = "unknown", 3869 .ops = &xport_default_ops, 3870 }; 3871 3872 CAM_XPT_XPORT(xport_default); 3873 3874 /* 3875 * A sim structure, listing the SIM entry points and instance 3876 * identification info is passed to xpt_bus_register to hook the SIM 3877 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3878 * for this new bus and places it in the array of buses and assigns 3879 * it a path_id. The path_id may be influenced by "hard wiring" 3880 * information specified by the user. Once interrupt services are 3881 * available, the bus will be probed. 3882 */ 3883 int32_t 3884 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus) 3885 { 3886 struct cam_eb *new_bus; 3887 struct cam_eb *old_bus; 3888 struct ccb_pathinq cpi; 3889 struct cam_path *path; 3890 cam_status status; 3891 3892 mtx_assert(sim->mtx, MA_OWNED); 3893 3894 sim->bus_id = bus; 3895 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3896 M_CAMXPT, M_NOWAIT|M_ZERO); 3897 if (new_bus == NULL) { 3898 /* Couldn't satisfy request */ 3899 return (CAM_RESRC_UNAVAIL); 3900 } 3901 3902 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF); 3903 TAILQ_INIT(&new_bus->et_entries); 3904 cam_sim_hold(sim); 3905 new_bus->sim = sim; 3906 timevalclear(&new_bus->last_reset); 3907 new_bus->flags = 0; 3908 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3909 new_bus->generation = 0; 3910 3911 xpt_lock_buses(); 3912 sim->path_id = new_bus->path_id = 3913 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3914 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 3915 while (old_bus != NULL 3916 && old_bus->path_id < new_bus->path_id) 3917 old_bus = TAILQ_NEXT(old_bus, links); 3918 if (old_bus != NULL) 3919 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3920 else 3921 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 3922 xsoftc.bus_generation++; 3923 xpt_unlock_buses(); 3924 3925 /* 3926 * Set a default transport so that a PATH_INQ can be issued to 3927 * the SIM. This will then allow for probing and attaching of 3928 * a more appropriate transport. 3929 */ 3930 new_bus->xport = &xport_default; 3931 3932 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id, 3933 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3934 if (status != CAM_REQ_CMP) { 3935 xpt_release_bus(new_bus); 3936 free(path, M_CAMXPT); 3937 return (CAM_RESRC_UNAVAIL); 3938 } 3939 3940 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL); 3941 cpi.ccb_h.func_code = XPT_PATH_INQ; 3942 xpt_action((union ccb *)&cpi); 3943 3944 if (cpi.ccb_h.status == CAM_REQ_CMP) { 3945 struct xpt_xport **xpt; 3946 3947 SET_FOREACH(xpt, cam_xpt_xport_set) { 3948 if ((*xpt)->xport == cpi.transport) { 3949 new_bus->xport = *xpt; 3950 break; 3951 } 3952 } 3953 if (new_bus->xport == NULL) { 3954 xpt_print(path, 3955 "No transport found for %d\n", cpi.transport); 3956 xpt_release_bus(new_bus); 3957 free(path, M_CAMXPT); 3958 return (CAM_RESRC_UNAVAIL); 3959 } 3960 } 3961 3962 /* Notify interested parties */ 3963 if (sim->path_id != CAM_XPT_PATH_ID) { 3964 3965 xpt_async(AC_PATH_REGISTERED, path, &cpi); 3966 if ((cpi.hba_misc & PIM_NOSCAN) == 0) { 3967 union ccb *scan_ccb; 3968 3969 /* Initiate bus rescan. */ 3970 scan_ccb = xpt_alloc_ccb_nowait(); 3971 if (scan_ccb != NULL) { 3972 scan_ccb->ccb_h.path = path; 3973 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS; 3974 scan_ccb->crcn.flags = 0; 3975 xpt_rescan(scan_ccb); 3976 } else { 3977 xpt_print(path, 3978 "Can't allocate CCB to scan bus\n"); 3979 xpt_free_path(path); 3980 } 3981 } else 3982 xpt_free_path(path); 3983 } else 3984 xpt_free_path(path); 3985 return (CAM_SUCCESS); 3986 } 3987 3988 int32_t 3989 xpt_bus_deregister(path_id_t pathid) 3990 { 3991 struct cam_path bus_path; 3992 cam_status status; 3993 3994 status = xpt_compile_path(&bus_path, NULL, pathid, 3995 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3996 if (status != CAM_REQ_CMP) 3997 return (status); 3998 3999 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4000 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4001 4002 /* Release the reference count held while registered. */ 4003 xpt_release_bus(bus_path.bus); 4004 xpt_release_path(&bus_path); 4005 4006 return (CAM_REQ_CMP); 4007 } 4008 4009 static path_id_t 4010 xptnextfreepathid(void) 4011 { 4012 struct cam_eb *bus; 4013 path_id_t pathid; 4014 const char *strval; 4015 4016 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4017 pathid = 0; 4018 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4019 retry: 4020 /* Find an unoccupied pathid */ 4021 while (bus != NULL && bus->path_id <= pathid) { 4022 if (bus->path_id == pathid) 4023 pathid++; 4024 bus = TAILQ_NEXT(bus, links); 4025 } 4026 4027 /* 4028 * Ensure that this pathid is not reserved for 4029 * a bus that may be registered in the future. 4030 */ 4031 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4032 ++pathid; 4033 /* Start the search over */ 4034 goto retry; 4035 } 4036 return (pathid); 4037 } 4038 4039 static path_id_t 4040 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4041 { 4042 path_id_t pathid; 4043 int i, dunit, val; 4044 char buf[32]; 4045 const char *dname; 4046 4047 pathid = CAM_XPT_PATH_ID; 4048 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4049 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0) 4050 return (pathid); 4051 i = 0; 4052 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) { 4053 if (strcmp(dname, "scbus")) { 4054 /* Avoid a bit of foot shooting. */ 4055 continue; 4056 } 4057 if (dunit < 0) /* unwired?! */ 4058 continue; 4059 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4060 if (sim_bus == val) { 4061 pathid = dunit; 4062 break; 4063 } 4064 } else if (sim_bus == 0) { 4065 /* Unspecified matches bus 0 */ 4066 pathid = dunit; 4067 break; 4068 } else { 4069 printf("Ambiguous scbus configuration for %s%d " 4070 "bus %d, cannot wire down. The kernel " 4071 "config entry for scbus%d should " 4072 "specify a controller bus.\n" 4073 "Scbus will be assigned dynamically.\n", 4074 sim_name, sim_unit, sim_bus, dunit); 4075 break; 4076 } 4077 } 4078 4079 if (pathid == CAM_XPT_PATH_ID) 4080 pathid = xptnextfreepathid(); 4081 return (pathid); 4082 } 4083 4084 static const char * 4085 xpt_async_string(u_int32_t async_code) 4086 { 4087 4088 switch (async_code) { 4089 case AC_BUS_RESET: return ("AC_BUS_RESET"); 4090 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL"); 4091 case AC_SCSI_AEN: return ("AC_SCSI_AEN"); 4092 case AC_SENT_BDR: return ("AC_SENT_BDR"); 4093 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED"); 4094 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED"); 4095 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE"); 4096 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE"); 4097 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG"); 4098 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED"); 4099 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED"); 4100 case AC_CONTRACT: return ("AC_CONTRACT"); 4101 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED"); 4102 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION"); 4103 } 4104 return ("AC_UNKNOWN"); 4105 } 4106 4107 static int 4108 xpt_async_size(u_int32_t async_code) 4109 { 4110 4111 switch (async_code) { 4112 case AC_BUS_RESET: return (0); 4113 case AC_UNSOL_RESEL: return (0); 4114 case AC_SCSI_AEN: return (0); 4115 case AC_SENT_BDR: return (0); 4116 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq)); 4117 case AC_PATH_DEREGISTERED: return (0); 4118 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev)); 4119 case AC_LOST_DEVICE: return (0); 4120 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings)); 4121 case AC_INQ_CHANGED: return (0); 4122 case AC_GETDEV_CHANGED: return (0); 4123 case AC_CONTRACT: return (sizeof(struct ac_contract)); 4124 case AC_ADVINFO_CHANGED: return (-1); 4125 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio)); 4126 } 4127 return (0); 4128 } 4129 4130 static int 4131 xpt_async_process_dev(struct cam_ed *device, void *arg) 4132 { 4133 union ccb *ccb = arg; 4134 struct cam_path *path = ccb->ccb_h.path; 4135 void *async_arg = ccb->casync.async_arg_ptr; 4136 u_int32_t async_code = ccb->casync.async_code; 4137 int relock; 4138 4139 if (path->device != device 4140 && path->device->lun_id != CAM_LUN_WILDCARD 4141 && device->lun_id != CAM_LUN_WILDCARD) 4142 return (1); 4143 4144 /* 4145 * The async callback could free the device. 4146 * If it is a broadcast async, it doesn't hold 4147 * device reference, so take our own reference. 4148 */ 4149 xpt_acquire_device(device); 4150 4151 /* 4152 * If async for specific device is to be delivered to 4153 * the wildcard client, take the specific device lock. 4154 * XXX: We may need a way for client to specify it. 4155 */ 4156 if ((device->lun_id == CAM_LUN_WILDCARD && 4157 path->device->lun_id != CAM_LUN_WILDCARD) || 4158 (device->target->target_id == CAM_TARGET_WILDCARD && 4159 path->target->target_id != CAM_TARGET_WILDCARD) || 4160 (device->target->bus->path_id == CAM_BUS_WILDCARD && 4161 path->target->bus->path_id != CAM_BUS_WILDCARD)) { 4162 mtx_unlock(&device->device_mtx); 4163 xpt_path_lock(path); 4164 relock = 1; 4165 } else 4166 relock = 0; 4167 4168 (*(device->target->bus->xport->ops->async))(async_code, 4169 device->target->bus, device->target, device, async_arg); 4170 xpt_async_bcast(&device->asyncs, async_code, path, async_arg); 4171 4172 if (relock) { 4173 xpt_path_unlock(path); 4174 mtx_lock(&device->device_mtx); 4175 } 4176 xpt_release_device(device); 4177 return (1); 4178 } 4179 4180 static int 4181 xpt_async_process_tgt(struct cam_et *target, void *arg) 4182 { 4183 union ccb *ccb = arg; 4184 struct cam_path *path = ccb->ccb_h.path; 4185 4186 if (path->target != target 4187 && path->target->target_id != CAM_TARGET_WILDCARD 4188 && target->target_id != CAM_TARGET_WILDCARD) 4189 return (1); 4190 4191 if (ccb->casync.async_code == AC_SENT_BDR) { 4192 /* Update our notion of when the last reset occurred */ 4193 microtime(&target->last_reset); 4194 } 4195 4196 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb)); 4197 } 4198 4199 static void 4200 xpt_async_process(struct cam_periph *periph, union ccb *ccb) 4201 { 4202 struct cam_eb *bus; 4203 struct cam_path *path; 4204 void *async_arg; 4205 u_int32_t async_code; 4206 4207 path = ccb->ccb_h.path; 4208 async_code = ccb->casync.async_code; 4209 async_arg = ccb->casync.async_arg_ptr; 4210 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO, 4211 ("xpt_async(%s)\n", xpt_async_string(async_code))); 4212 bus = path->bus; 4213 4214 if (async_code == AC_BUS_RESET) { 4215 /* Update our notion of when the last reset occurred */ 4216 microtime(&bus->last_reset); 4217 } 4218 4219 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb); 4220 4221 /* 4222 * If this wasn't a fully wildcarded async, tell all 4223 * clients that want all async events. 4224 */ 4225 if (bus != xpt_periph->path->bus) { 4226 xpt_path_lock(xpt_periph->path); 4227 xpt_async_process_dev(xpt_periph->path->device, ccb); 4228 xpt_path_unlock(xpt_periph->path); 4229 } 4230 4231 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4232 xpt_release_devq(path, 1, TRUE); 4233 else 4234 xpt_release_simq(path->bus->sim, TRUE); 4235 if (ccb->casync.async_arg_size > 0) 4236 free(async_arg, M_CAMXPT); 4237 xpt_free_path(path); 4238 xpt_free_ccb(ccb); 4239 } 4240 4241 static void 4242 xpt_async_bcast(struct async_list *async_head, 4243 u_int32_t async_code, 4244 struct cam_path *path, void *async_arg) 4245 { 4246 struct async_node *cur_entry; 4247 int lock; 4248 4249 cur_entry = SLIST_FIRST(async_head); 4250 while (cur_entry != NULL) { 4251 struct async_node *next_entry; 4252 /* 4253 * Grab the next list entry before we call the current 4254 * entry's callback. This is because the callback function 4255 * can delete its async callback entry. 4256 */ 4257 next_entry = SLIST_NEXT(cur_entry, links); 4258 if ((cur_entry->event_enable & async_code) != 0) { 4259 lock = cur_entry->event_lock; 4260 if (lock) 4261 CAM_SIM_LOCK(path->device->sim); 4262 cur_entry->callback(cur_entry->callback_arg, 4263 async_code, path, 4264 async_arg); 4265 if (lock) 4266 CAM_SIM_UNLOCK(path->device->sim); 4267 } 4268 cur_entry = next_entry; 4269 } 4270 } 4271 4272 void 4273 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4274 { 4275 union ccb *ccb; 4276 int size; 4277 4278 ccb = xpt_alloc_ccb_nowait(); 4279 if (ccb == NULL) { 4280 xpt_print(path, "Can't allocate CCB to send %s\n", 4281 xpt_async_string(async_code)); 4282 return; 4283 } 4284 4285 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) { 4286 xpt_print(path, "Can't allocate path to send %s\n", 4287 xpt_async_string(async_code)); 4288 xpt_free_ccb(ccb); 4289 return; 4290 } 4291 ccb->ccb_h.path->periph = NULL; 4292 ccb->ccb_h.func_code = XPT_ASYNC; 4293 ccb->ccb_h.cbfcnp = xpt_async_process; 4294 ccb->ccb_h.flags |= CAM_UNLOCKED; 4295 ccb->casync.async_code = async_code; 4296 ccb->casync.async_arg_size = 0; 4297 size = xpt_async_size(async_code); 4298 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, 4299 ("xpt_async: func %#x %s aync_code %d %s\n", 4300 ccb->ccb_h.func_code, 4301 xpt_action_name(ccb->ccb_h.func_code), 4302 async_code, 4303 xpt_async_string(async_code))); 4304 if (size > 0 && async_arg != NULL) { 4305 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT); 4306 if (ccb->casync.async_arg_ptr == NULL) { 4307 xpt_print(path, "Can't allocate argument to send %s\n", 4308 xpt_async_string(async_code)); 4309 xpt_free_path(ccb->ccb_h.path); 4310 xpt_free_ccb(ccb); 4311 return; 4312 } 4313 memcpy(ccb->casync.async_arg_ptr, async_arg, size); 4314 ccb->casync.async_arg_size = size; 4315 } else if (size < 0) { 4316 ccb->casync.async_arg_ptr = async_arg; 4317 ccb->casync.async_arg_size = size; 4318 } 4319 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD) 4320 xpt_freeze_devq(path, 1); 4321 else 4322 xpt_freeze_simq(path->bus->sim, 1); 4323 xpt_done(ccb); 4324 } 4325 4326 static void 4327 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus, 4328 struct cam_et *target, struct cam_ed *device, 4329 void *async_arg) 4330 { 4331 4332 /* 4333 * We only need to handle events for real devices. 4334 */ 4335 if (target->target_id == CAM_TARGET_WILDCARD 4336 || device->lun_id == CAM_LUN_WILDCARD) 4337 return; 4338 4339 printf("%s called\n", __func__); 4340 } 4341 4342 static uint32_t 4343 xpt_freeze_devq_device(struct cam_ed *dev, u_int count) 4344 { 4345 struct cam_devq *devq; 4346 uint32_t freeze; 4347 4348 devq = dev->sim->devq; 4349 mtx_assert(&devq->send_mtx, MA_OWNED); 4350 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4351 ("xpt_freeze_devq_device(%d) %u->%u\n", count, 4352 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count)); 4353 freeze = (dev->ccbq.queue.qfrozen_cnt += count); 4354 /* Remove frozen device from sendq. */ 4355 if (device_is_queued(dev)) 4356 camq_remove(&devq->send_queue, dev->devq_entry.index); 4357 return (freeze); 4358 } 4359 4360 u_int32_t 4361 xpt_freeze_devq(struct cam_path *path, u_int count) 4362 { 4363 struct cam_ed *dev = path->device; 4364 struct cam_devq *devq; 4365 uint32_t freeze; 4366 4367 devq = dev->sim->devq; 4368 mtx_lock(&devq->send_mtx); 4369 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count)); 4370 freeze = xpt_freeze_devq_device(dev, count); 4371 mtx_unlock(&devq->send_mtx); 4372 return (freeze); 4373 } 4374 4375 u_int32_t 4376 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4377 { 4378 struct cam_devq *devq; 4379 uint32_t freeze; 4380 4381 devq = sim->devq; 4382 mtx_lock(&devq->send_mtx); 4383 freeze = (devq->send_queue.qfrozen_cnt += count); 4384 mtx_unlock(&devq->send_mtx); 4385 return (freeze); 4386 } 4387 4388 static void 4389 xpt_release_devq_timeout(void *arg) 4390 { 4391 struct cam_ed *dev; 4392 struct cam_devq *devq; 4393 4394 dev = (struct cam_ed *)arg; 4395 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n")); 4396 devq = dev->sim->devq; 4397 mtx_assert(&devq->send_mtx, MA_OWNED); 4398 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE)) 4399 xpt_run_devq(devq); 4400 } 4401 4402 void 4403 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4404 { 4405 struct cam_ed *dev; 4406 struct cam_devq *devq; 4407 4408 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n", 4409 count, run_queue)); 4410 dev = path->device; 4411 devq = dev->sim->devq; 4412 mtx_lock(&devq->send_mtx); 4413 if (xpt_release_devq_device(dev, count, run_queue)) 4414 xpt_run_devq(dev->sim->devq); 4415 mtx_unlock(&devq->send_mtx); 4416 } 4417 4418 static int 4419 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4420 { 4421 4422 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED); 4423 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, 4424 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue, 4425 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count)); 4426 if (count > dev->ccbq.queue.qfrozen_cnt) { 4427 #ifdef INVARIANTS 4428 printf("xpt_release_devq(): requested %u > present %u\n", 4429 count, dev->ccbq.queue.qfrozen_cnt); 4430 #endif 4431 count = dev->ccbq.queue.qfrozen_cnt; 4432 } 4433 dev->ccbq.queue.qfrozen_cnt -= count; 4434 if (dev->ccbq.queue.qfrozen_cnt == 0) { 4435 /* 4436 * No longer need to wait for a successful 4437 * command completion. 4438 */ 4439 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4440 /* 4441 * Remove any timeouts that might be scheduled 4442 * to release this queue. 4443 */ 4444 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4445 callout_stop(&dev->callout); 4446 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4447 } 4448 /* 4449 * Now that we are unfrozen schedule the 4450 * device so any pending transactions are 4451 * run. 4452 */ 4453 xpt_schedule_devq(dev->sim->devq, dev); 4454 } else 4455 run_queue = 0; 4456 return (run_queue); 4457 } 4458 4459 void 4460 xpt_release_simq(struct cam_sim *sim, int run_queue) 4461 { 4462 struct cam_devq *devq; 4463 4464 devq = sim->devq; 4465 mtx_lock(&devq->send_mtx); 4466 if (devq->send_queue.qfrozen_cnt <= 0) { 4467 #ifdef INVARIANTS 4468 printf("xpt_release_simq: requested 1 > present %u\n", 4469 devq->send_queue.qfrozen_cnt); 4470 #endif 4471 } else 4472 devq->send_queue.qfrozen_cnt--; 4473 if (devq->send_queue.qfrozen_cnt == 0) { 4474 /* 4475 * If there is a timeout scheduled to release this 4476 * sim queue, remove it. The queue frozen count is 4477 * already at 0. 4478 */ 4479 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4480 callout_stop(&sim->callout); 4481 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4482 } 4483 if (run_queue) { 4484 /* 4485 * Now that we are unfrozen run the send queue. 4486 */ 4487 xpt_run_devq(sim->devq); 4488 } 4489 } 4490 mtx_unlock(&devq->send_mtx); 4491 } 4492 4493 /* 4494 * XXX Appears to be unused. 4495 */ 4496 static void 4497 xpt_release_simq_timeout(void *arg) 4498 { 4499 struct cam_sim *sim; 4500 4501 sim = (struct cam_sim *)arg; 4502 xpt_release_simq(sim, /* run_queue */ TRUE); 4503 } 4504 4505 void 4506 xpt_done(union ccb *done_ccb) 4507 { 4508 struct cam_doneq *queue; 4509 int run, hash; 4510 4511 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 4512 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO && 4513 done_ccb->csio.bio != NULL) 4514 biotrack(done_ccb->csio.bio, __func__); 4515 #endif 4516 4517 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4518 ("xpt_done: func= %#x %s status %#x\n", 4519 done_ccb->ccb_h.func_code, 4520 xpt_action_name(done_ccb->ccb_h.func_code), 4521 done_ccb->ccb_h.status)); 4522 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4523 return; 4524 4525 /* Store the time the ccb was in the sim */ 4526 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data; 4527 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id + 4528 done_ccb->ccb_h.target_lun) % cam_num_doneqs; 4529 queue = &cam_doneqs[hash]; 4530 mtx_lock(&queue->cam_doneq_mtx); 4531 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq)); 4532 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe); 4533 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4534 mtx_unlock(&queue->cam_doneq_mtx); 4535 if (run) 4536 wakeup(&queue->cam_doneq); 4537 } 4538 4539 void 4540 xpt_done_direct(union ccb *done_ccb) 4541 { 4542 4543 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4544 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status)); 4545 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0) 4546 return; 4547 4548 /* Store the time the ccb was in the sim */ 4549 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data; 4550 xpt_done_process(&done_ccb->ccb_h); 4551 } 4552 4553 union ccb * 4554 xpt_alloc_ccb() 4555 { 4556 union ccb *new_ccb; 4557 4558 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4559 return (new_ccb); 4560 } 4561 4562 union ccb * 4563 xpt_alloc_ccb_nowait() 4564 { 4565 union ccb *new_ccb; 4566 4567 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4568 return (new_ccb); 4569 } 4570 4571 void 4572 xpt_free_ccb(union ccb *free_ccb) 4573 { 4574 free(free_ccb, M_CAMCCB); 4575 } 4576 4577 4578 4579 /* Private XPT functions */ 4580 4581 /* 4582 * Get a CAM control block for the caller. Charge the structure to the device 4583 * referenced by the path. If we don't have sufficient resources to allocate 4584 * more ccbs, we return NULL. 4585 */ 4586 static union ccb * 4587 xpt_get_ccb_nowait(struct cam_periph *periph) 4588 { 4589 union ccb *new_ccb; 4590 4591 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT); 4592 if (new_ccb == NULL) 4593 return (NULL); 4594 periph->periph_allocated++; 4595 cam_ccbq_take_opening(&periph->path->device->ccbq); 4596 return (new_ccb); 4597 } 4598 4599 static union ccb * 4600 xpt_get_ccb(struct cam_periph *periph) 4601 { 4602 union ccb *new_ccb; 4603 4604 cam_periph_unlock(periph); 4605 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK); 4606 cam_periph_lock(periph); 4607 periph->periph_allocated++; 4608 cam_ccbq_take_opening(&periph->path->device->ccbq); 4609 return (new_ccb); 4610 } 4611 4612 union ccb * 4613 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority) 4614 { 4615 struct ccb_hdr *ccb_h; 4616 4617 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n")); 4618 cam_periph_assert(periph, MA_OWNED); 4619 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL || 4620 ccb_h->pinfo.priority != priority) { 4621 if (priority < periph->immediate_priority) { 4622 periph->immediate_priority = priority; 4623 xpt_run_allocq(periph, 0); 4624 } else 4625 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO, 4626 "cgticb", 0); 4627 } 4628 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle); 4629 return ((union ccb *)ccb_h); 4630 } 4631 4632 static void 4633 xpt_acquire_bus(struct cam_eb *bus) 4634 { 4635 4636 xpt_lock_buses(); 4637 bus->refcount++; 4638 xpt_unlock_buses(); 4639 } 4640 4641 static void 4642 xpt_release_bus(struct cam_eb *bus) 4643 { 4644 4645 xpt_lock_buses(); 4646 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1")); 4647 if (--bus->refcount > 0) { 4648 xpt_unlock_buses(); 4649 return; 4650 } 4651 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4652 xsoftc.bus_generation++; 4653 xpt_unlock_buses(); 4654 KASSERT(TAILQ_EMPTY(&bus->et_entries), 4655 ("destroying bus, but target list is not empty")); 4656 cam_sim_release(bus->sim); 4657 mtx_destroy(&bus->eb_mtx); 4658 free(bus, M_CAMXPT); 4659 } 4660 4661 static struct cam_et * 4662 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4663 { 4664 struct cam_et *cur_target, *target; 4665 4666 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED); 4667 mtx_assert(&bus->eb_mtx, MA_OWNED); 4668 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, 4669 M_NOWAIT|M_ZERO); 4670 if (target == NULL) 4671 return (NULL); 4672 4673 TAILQ_INIT(&target->ed_entries); 4674 target->bus = bus; 4675 target->target_id = target_id; 4676 target->refcount = 1; 4677 target->generation = 0; 4678 target->luns = NULL; 4679 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF); 4680 timevalclear(&target->last_reset); 4681 /* 4682 * Hold a reference to our parent bus so it 4683 * will not go away before we do. 4684 */ 4685 bus->refcount++; 4686 4687 /* Insertion sort into our bus's target list */ 4688 cur_target = TAILQ_FIRST(&bus->et_entries); 4689 while (cur_target != NULL && cur_target->target_id < target_id) 4690 cur_target = TAILQ_NEXT(cur_target, links); 4691 if (cur_target != NULL) { 4692 TAILQ_INSERT_BEFORE(cur_target, target, links); 4693 } else { 4694 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4695 } 4696 bus->generation++; 4697 return (target); 4698 } 4699 4700 static void 4701 xpt_acquire_target(struct cam_et *target) 4702 { 4703 struct cam_eb *bus = target->bus; 4704 4705 mtx_lock(&bus->eb_mtx); 4706 target->refcount++; 4707 mtx_unlock(&bus->eb_mtx); 4708 } 4709 4710 static void 4711 xpt_release_target(struct cam_et *target) 4712 { 4713 struct cam_eb *bus = target->bus; 4714 4715 mtx_lock(&bus->eb_mtx); 4716 if (--target->refcount > 0) { 4717 mtx_unlock(&bus->eb_mtx); 4718 return; 4719 } 4720 TAILQ_REMOVE(&bus->et_entries, target, links); 4721 bus->generation++; 4722 mtx_unlock(&bus->eb_mtx); 4723 KASSERT(TAILQ_EMPTY(&target->ed_entries), 4724 ("destroying target, but device list is not empty")); 4725 xpt_release_bus(bus); 4726 mtx_destroy(&target->luns_mtx); 4727 if (target->luns) 4728 free(target->luns, M_CAMXPT); 4729 free(target, M_CAMXPT); 4730 } 4731 4732 static struct cam_ed * 4733 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target, 4734 lun_id_t lun_id) 4735 { 4736 struct cam_ed *device; 4737 4738 device = xpt_alloc_device(bus, target, lun_id); 4739 if (device == NULL) 4740 return (NULL); 4741 4742 device->mintags = 1; 4743 device->maxtags = 1; 4744 return (device); 4745 } 4746 4747 static void 4748 xpt_destroy_device(void *context, int pending) 4749 { 4750 struct cam_ed *device = context; 4751 4752 mtx_lock(&device->device_mtx); 4753 mtx_destroy(&device->device_mtx); 4754 free(device, M_CAMDEV); 4755 } 4756 4757 struct cam_ed * 4758 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4759 { 4760 struct cam_ed *cur_device, *device; 4761 struct cam_devq *devq; 4762 cam_status status; 4763 4764 mtx_assert(&bus->eb_mtx, MA_OWNED); 4765 /* Make space for us in the device queue on our bus */ 4766 devq = bus->sim->devq; 4767 mtx_lock(&devq->send_mtx); 4768 status = cam_devq_resize(devq, devq->send_queue.array_size + 1); 4769 mtx_unlock(&devq->send_mtx); 4770 if (status != CAM_REQ_CMP) 4771 return (NULL); 4772 4773 device = (struct cam_ed *)malloc(sizeof(*device), 4774 M_CAMDEV, M_NOWAIT|M_ZERO); 4775 if (device == NULL) 4776 return (NULL); 4777 4778 cam_init_pinfo(&device->devq_entry); 4779 device->target = target; 4780 device->lun_id = lun_id; 4781 device->sim = bus->sim; 4782 if (cam_ccbq_init(&device->ccbq, 4783 bus->sim->max_dev_openings) != 0) { 4784 free(device, M_CAMDEV); 4785 return (NULL); 4786 } 4787 SLIST_INIT(&device->asyncs); 4788 SLIST_INIT(&device->periphs); 4789 device->generation = 0; 4790 device->flags = CAM_DEV_UNCONFIGURED; 4791 device->tag_delay_count = 0; 4792 device->tag_saved_openings = 0; 4793 device->refcount = 1; 4794 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF); 4795 callout_init_mtx(&device->callout, &devq->send_mtx, 0); 4796 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device); 4797 /* 4798 * Hold a reference to our parent bus so it 4799 * will not go away before we do. 4800 */ 4801 target->refcount++; 4802 4803 cur_device = TAILQ_FIRST(&target->ed_entries); 4804 while (cur_device != NULL && cur_device->lun_id < lun_id) 4805 cur_device = TAILQ_NEXT(cur_device, links); 4806 if (cur_device != NULL) 4807 TAILQ_INSERT_BEFORE(cur_device, device, links); 4808 else 4809 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4810 target->generation++; 4811 return (device); 4812 } 4813 4814 void 4815 xpt_acquire_device(struct cam_ed *device) 4816 { 4817 struct cam_eb *bus = device->target->bus; 4818 4819 mtx_lock(&bus->eb_mtx); 4820 device->refcount++; 4821 mtx_unlock(&bus->eb_mtx); 4822 } 4823 4824 void 4825 xpt_release_device(struct cam_ed *device) 4826 { 4827 struct cam_eb *bus = device->target->bus; 4828 struct cam_devq *devq; 4829 4830 mtx_lock(&bus->eb_mtx); 4831 if (--device->refcount > 0) { 4832 mtx_unlock(&bus->eb_mtx); 4833 return; 4834 } 4835 4836 TAILQ_REMOVE(&device->target->ed_entries, device,links); 4837 device->target->generation++; 4838 mtx_unlock(&bus->eb_mtx); 4839 4840 /* Release our slot in the devq */ 4841 devq = bus->sim->devq; 4842 mtx_lock(&devq->send_mtx); 4843 cam_devq_resize(devq, devq->send_queue.array_size - 1); 4844 mtx_unlock(&devq->send_mtx); 4845 4846 KASSERT(SLIST_EMPTY(&device->periphs), 4847 ("destroying device, but periphs list is not empty")); 4848 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX, 4849 ("destroying device while still queued for ccbs")); 4850 4851 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4852 callout_stop(&device->callout); 4853 4854 xpt_release_target(device->target); 4855 4856 cam_ccbq_fini(&device->ccbq); 4857 /* 4858 * Free allocated memory. free(9) does nothing if the 4859 * supplied pointer is NULL, so it is safe to call without 4860 * checking. 4861 */ 4862 free(device->supported_vpds, M_CAMXPT); 4863 free(device->device_id, M_CAMXPT); 4864 free(device->ext_inq, M_CAMXPT); 4865 free(device->physpath, M_CAMXPT); 4866 free(device->rcap_buf, M_CAMXPT); 4867 free(device->serial_num, M_CAMXPT); 4868 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task); 4869 } 4870 4871 u_int32_t 4872 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4873 { 4874 int result; 4875 struct cam_ed *dev; 4876 4877 dev = path->device; 4878 mtx_lock(&dev->sim->devq->send_mtx); 4879 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4880 mtx_unlock(&dev->sim->devq->send_mtx); 4881 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 4882 || (dev->inq_flags & SID_CmdQue) != 0) 4883 dev->tag_saved_openings = newopenings; 4884 return (result); 4885 } 4886 4887 static struct cam_eb * 4888 xpt_find_bus(path_id_t path_id) 4889 { 4890 struct cam_eb *bus; 4891 4892 xpt_lock_buses(); 4893 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4894 bus != NULL; 4895 bus = TAILQ_NEXT(bus, links)) { 4896 if (bus->path_id == path_id) { 4897 bus->refcount++; 4898 break; 4899 } 4900 } 4901 xpt_unlock_buses(); 4902 return (bus); 4903 } 4904 4905 static struct cam_et * 4906 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4907 { 4908 struct cam_et *target; 4909 4910 mtx_assert(&bus->eb_mtx, MA_OWNED); 4911 for (target = TAILQ_FIRST(&bus->et_entries); 4912 target != NULL; 4913 target = TAILQ_NEXT(target, links)) { 4914 if (target->target_id == target_id) { 4915 target->refcount++; 4916 break; 4917 } 4918 } 4919 return (target); 4920 } 4921 4922 static struct cam_ed * 4923 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4924 { 4925 struct cam_ed *device; 4926 4927 mtx_assert(&target->bus->eb_mtx, MA_OWNED); 4928 for (device = TAILQ_FIRST(&target->ed_entries); 4929 device != NULL; 4930 device = TAILQ_NEXT(device, links)) { 4931 if (device->lun_id == lun_id) { 4932 device->refcount++; 4933 break; 4934 } 4935 } 4936 return (device); 4937 } 4938 4939 void 4940 xpt_start_tags(struct cam_path *path) 4941 { 4942 struct ccb_relsim crs; 4943 struct cam_ed *device; 4944 struct cam_sim *sim; 4945 int newopenings; 4946 4947 device = path->device; 4948 sim = path->bus->sim; 4949 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4950 xpt_freeze_devq(path, /*count*/1); 4951 device->inq_flags |= SID_CmdQue; 4952 if (device->tag_saved_openings != 0) 4953 newopenings = device->tag_saved_openings; 4954 else 4955 newopenings = min(device->maxtags, 4956 sim->max_tagged_dev_openings); 4957 xpt_dev_ccbq_resize(path, newopenings); 4958 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4959 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4960 crs.ccb_h.func_code = XPT_REL_SIMQ; 4961 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4962 crs.openings 4963 = crs.release_timeout 4964 = crs.qfrozen_cnt 4965 = 0; 4966 xpt_action((union ccb *)&crs); 4967 } 4968 4969 void 4970 xpt_stop_tags(struct cam_path *path) 4971 { 4972 struct ccb_relsim crs; 4973 struct cam_ed *device; 4974 struct cam_sim *sim; 4975 4976 device = path->device; 4977 sim = path->bus->sim; 4978 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 4979 device->tag_delay_count = 0; 4980 xpt_freeze_devq(path, /*count*/1); 4981 device->inq_flags &= ~SID_CmdQue; 4982 xpt_dev_ccbq_resize(path, sim->max_dev_openings); 4983 xpt_async(AC_GETDEV_CHANGED, path, NULL); 4984 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL); 4985 crs.ccb_h.func_code = XPT_REL_SIMQ; 4986 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 4987 crs.openings 4988 = crs.release_timeout 4989 = crs.qfrozen_cnt 4990 = 0; 4991 xpt_action((union ccb *)&crs); 4992 } 4993 4994 static void 4995 xpt_boot_delay(void *arg) 4996 { 4997 4998 xpt_release_boot(); 4999 } 5000 5001 static void 5002 xpt_config(void *arg) 5003 { 5004 /* 5005 * Now that interrupts are enabled, go find our devices 5006 */ 5007 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq")) 5008 printf("xpt_config: failed to create taskqueue thread.\n"); 5009 5010 /* Setup debugging path */ 5011 if (cam_dflags != CAM_DEBUG_NONE) { 5012 if (xpt_create_path(&cam_dpath, NULL, 5013 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 5014 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 5015 printf("xpt_config: xpt_create_path() failed for debug" 5016 " target %d:%d:%d, debugging disabled\n", 5017 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 5018 cam_dflags = CAM_DEBUG_NONE; 5019 } 5020 } else 5021 cam_dpath = NULL; 5022 5023 periphdriver_init(1); 5024 xpt_hold_boot(); 5025 callout_init(&xsoftc.boot_callout, 1); 5026 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0, 5027 xpt_boot_delay, NULL, 0); 5028 /* Fire up rescan thread. */ 5029 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0, 5030 "cam", "scanner")) { 5031 printf("xpt_config: failed to create rescan thread.\n"); 5032 } 5033 } 5034 5035 void 5036 xpt_hold_boot(void) 5037 { 5038 xpt_lock_buses(); 5039 xsoftc.buses_to_config++; 5040 xpt_unlock_buses(); 5041 } 5042 5043 void 5044 xpt_release_boot(void) 5045 { 5046 xpt_lock_buses(); 5047 xsoftc.buses_to_config--; 5048 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) { 5049 struct xpt_task *task; 5050 5051 xsoftc.buses_config_done = 1; 5052 xpt_unlock_buses(); 5053 /* Call manually because we don't have any buses */ 5054 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT); 5055 if (task != NULL) { 5056 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 5057 taskqueue_enqueue(taskqueue_thread, &task->task); 5058 } 5059 } else 5060 xpt_unlock_buses(); 5061 } 5062 5063 /* 5064 * If the given device only has one peripheral attached to it, and if that 5065 * peripheral is the passthrough driver, announce it. This insures that the 5066 * user sees some sort of announcement for every peripheral in their system. 5067 */ 5068 static int 5069 xptpassannouncefunc(struct cam_ed *device, void *arg) 5070 { 5071 struct cam_periph *periph; 5072 int i; 5073 5074 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5075 periph = SLIST_NEXT(periph, periph_links), i++); 5076 5077 periph = SLIST_FIRST(&device->periphs); 5078 if ((i == 1) 5079 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5080 xpt_announce_periph(periph, NULL); 5081 5082 return(1); 5083 } 5084 5085 static void 5086 xpt_finishconfig_task(void *context, int pending) 5087 { 5088 5089 periphdriver_init(2); 5090 /* 5091 * Check for devices with no "standard" peripheral driver 5092 * attached. For any devices like that, announce the 5093 * passthrough driver so the user will see something. 5094 */ 5095 if (!bootverbose) 5096 xpt_for_all_devices(xptpassannouncefunc, NULL); 5097 5098 /* Release our hook so that the boot can continue. */ 5099 config_intrhook_disestablish(xsoftc.xpt_config_hook); 5100 free(xsoftc.xpt_config_hook, M_CAMXPT); 5101 xsoftc.xpt_config_hook = NULL; 5102 5103 free(context, M_CAMXPT); 5104 } 5105 5106 cam_status 5107 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 5108 struct cam_path *path) 5109 { 5110 struct ccb_setasync csa; 5111 cam_status status; 5112 int xptpath = 0; 5113 5114 if (path == NULL) { 5115 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 5116 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5117 if (status != CAM_REQ_CMP) 5118 return (status); 5119 xpt_path_lock(path); 5120 xptpath = 1; 5121 } 5122 5123 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL); 5124 csa.ccb_h.func_code = XPT_SASYNC_CB; 5125 csa.event_enable = event; 5126 csa.callback = cbfunc; 5127 csa.callback_arg = cbarg; 5128 xpt_action((union ccb *)&csa); 5129 status = csa.ccb_h.status; 5130 5131 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE, 5132 ("xpt_register_async: func %p\n", cbfunc)); 5133 5134 if (xptpath) { 5135 xpt_path_unlock(path); 5136 xpt_free_path(path); 5137 } 5138 5139 if ((status == CAM_REQ_CMP) && 5140 (csa.event_enable & AC_FOUND_DEVICE)) { 5141 /* 5142 * Get this peripheral up to date with all 5143 * the currently existing devices. 5144 */ 5145 xpt_for_all_devices(xptsetasyncfunc, &csa); 5146 } 5147 if ((status == CAM_REQ_CMP) && 5148 (csa.event_enable & AC_PATH_REGISTERED)) { 5149 /* 5150 * Get this peripheral up to date with all 5151 * the currently existing buses. 5152 */ 5153 xpt_for_all_busses(xptsetasyncbusfunc, &csa); 5154 } 5155 5156 return (status); 5157 } 5158 5159 static void 5160 xptaction(struct cam_sim *sim, union ccb *work_ccb) 5161 { 5162 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5163 5164 switch (work_ccb->ccb_h.func_code) { 5165 /* Common cases first */ 5166 case XPT_PATH_INQ: /* Path routing inquiry */ 5167 { 5168 struct ccb_pathinq *cpi; 5169 5170 cpi = &work_ccb->cpi; 5171 cpi->version_num = 1; /* XXX??? */ 5172 cpi->hba_inquiry = 0; 5173 cpi->target_sprt = 0; 5174 cpi->hba_misc = 0; 5175 cpi->hba_eng_cnt = 0; 5176 cpi->max_target = 0; 5177 cpi->max_lun = 0; 5178 cpi->initiator_id = 0; 5179 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5180 strlcpy(cpi->hba_vid, "", HBA_IDLEN); 5181 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5182 cpi->unit_number = sim->unit_number; 5183 cpi->bus_id = sim->bus_id; 5184 cpi->base_transfer_speed = 0; 5185 cpi->protocol = PROTO_UNSPECIFIED; 5186 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 5187 cpi->transport = XPORT_UNSPECIFIED; 5188 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 5189 cpi->ccb_h.status = CAM_REQ_CMP; 5190 xpt_done(work_ccb); 5191 break; 5192 } 5193 default: 5194 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5195 xpt_done(work_ccb); 5196 break; 5197 } 5198 } 5199 5200 /* 5201 * The xpt as a "controller" has no interrupt sources, so polling 5202 * is a no-op. 5203 */ 5204 static void 5205 xptpoll(struct cam_sim *sim) 5206 { 5207 } 5208 5209 void 5210 xpt_lock_buses(void) 5211 { 5212 mtx_lock(&xsoftc.xpt_topo_lock); 5213 } 5214 5215 void 5216 xpt_unlock_buses(void) 5217 { 5218 mtx_unlock(&xsoftc.xpt_topo_lock); 5219 } 5220 5221 struct mtx * 5222 xpt_path_mtx(struct cam_path *path) 5223 { 5224 5225 return (&path->device->device_mtx); 5226 } 5227 5228 static void 5229 xpt_done_process(struct ccb_hdr *ccb_h) 5230 { 5231 struct cam_sim *sim; 5232 struct cam_devq *devq; 5233 struct mtx *mtx = NULL; 5234 5235 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING) 5236 struct ccb_scsiio *csio; 5237 5238 if (ccb_h->func_code == XPT_SCSI_IO) { 5239 csio = &((union ccb *)ccb_h)->csio; 5240 if (csio->bio != NULL) 5241 biotrack(csio->bio, __func__); 5242 } 5243 #endif 5244 5245 if (ccb_h->flags & CAM_HIGH_POWER) { 5246 struct highpowerlist *hphead; 5247 struct cam_ed *device; 5248 5249 mtx_lock(&xsoftc.xpt_highpower_lock); 5250 hphead = &xsoftc.highpowerq; 5251 5252 device = STAILQ_FIRST(hphead); 5253 5254 /* 5255 * Increment the count since this command is done. 5256 */ 5257 xsoftc.num_highpower++; 5258 5259 /* 5260 * Any high powered commands queued up? 5261 */ 5262 if (device != NULL) { 5263 5264 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry); 5265 mtx_unlock(&xsoftc.xpt_highpower_lock); 5266 5267 mtx_lock(&device->sim->devq->send_mtx); 5268 xpt_release_devq_device(device, 5269 /*count*/1, /*runqueue*/TRUE); 5270 mtx_unlock(&device->sim->devq->send_mtx); 5271 } else 5272 mtx_unlock(&xsoftc.xpt_highpower_lock); 5273 } 5274 5275 sim = ccb_h->path->bus->sim; 5276 5277 if (ccb_h->status & CAM_RELEASE_SIMQ) { 5278 xpt_release_simq(sim, /*run_queue*/FALSE); 5279 ccb_h->status &= ~CAM_RELEASE_SIMQ; 5280 } 5281 5282 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 5283 && (ccb_h->status & CAM_DEV_QFRZN)) { 5284 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); 5285 ccb_h->status &= ~CAM_DEV_QFRZN; 5286 } 5287 5288 devq = sim->devq; 5289 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 5290 struct cam_ed *dev = ccb_h->path->device; 5291 5292 mtx_lock(&devq->send_mtx); 5293 devq->send_active--; 5294 devq->send_openings++; 5295 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5296 5297 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5298 && (dev->ccbq.dev_active == 0))) { 5299 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY; 5300 xpt_release_devq_device(dev, /*count*/1, 5301 /*run_queue*/FALSE); 5302 } 5303 5304 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5305 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) { 5306 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 5307 xpt_release_devq_device(dev, /*count*/1, 5308 /*run_queue*/FALSE); 5309 } 5310 5311 if (!device_is_queued(dev)) 5312 (void)xpt_schedule_devq(devq, dev); 5313 xpt_run_devq(devq); 5314 mtx_unlock(&devq->send_mtx); 5315 5316 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) { 5317 mtx = xpt_path_mtx(ccb_h->path); 5318 mtx_lock(mtx); 5319 5320 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5321 && (--dev->tag_delay_count == 0)) 5322 xpt_start_tags(ccb_h->path); 5323 } 5324 } 5325 5326 if ((ccb_h->flags & CAM_UNLOCKED) == 0) { 5327 if (mtx == NULL) { 5328 mtx = xpt_path_mtx(ccb_h->path); 5329 mtx_lock(mtx); 5330 } 5331 } else { 5332 if (mtx != NULL) { 5333 mtx_unlock(mtx); 5334 mtx = NULL; 5335 } 5336 } 5337 5338 /* Call the peripheral driver's callback */ 5339 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5340 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 5341 if (mtx != NULL) 5342 mtx_unlock(mtx); 5343 } 5344 5345 void 5346 xpt_done_td(void *arg) 5347 { 5348 struct cam_doneq *queue = arg; 5349 struct ccb_hdr *ccb_h; 5350 STAILQ_HEAD(, ccb_hdr) doneq; 5351 5352 STAILQ_INIT(&doneq); 5353 mtx_lock(&queue->cam_doneq_mtx); 5354 while (1) { 5355 while (STAILQ_EMPTY(&queue->cam_doneq)) { 5356 queue->cam_doneq_sleep = 1; 5357 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx, 5358 PRIBIO, "-", 0); 5359 queue->cam_doneq_sleep = 0; 5360 } 5361 STAILQ_CONCAT(&doneq, &queue->cam_doneq); 5362 mtx_unlock(&queue->cam_doneq_mtx); 5363 5364 THREAD_NO_SLEEPING(); 5365 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) { 5366 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe); 5367 xpt_done_process(ccb_h); 5368 } 5369 THREAD_SLEEPING_OK(); 5370 5371 mtx_lock(&queue->cam_doneq_mtx); 5372 } 5373 } 5374 5375 static void 5376 camisr_runqueue(void) 5377 { 5378 struct ccb_hdr *ccb_h; 5379 struct cam_doneq *queue; 5380 int i; 5381 5382 /* Process global queues. */ 5383 for (i = 0; i < cam_num_doneqs; i++) { 5384 queue = &cam_doneqs[i]; 5385 mtx_lock(&queue->cam_doneq_mtx); 5386 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) { 5387 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe); 5388 mtx_unlock(&queue->cam_doneq_mtx); 5389 xpt_done_process(ccb_h); 5390 mtx_lock(&queue->cam_doneq_mtx); 5391 } 5392 mtx_unlock(&queue->cam_doneq_mtx); 5393 } 5394 } 5395 5396 struct kv 5397 { 5398 uint32_t v; 5399 const char *name; 5400 }; 5401 5402 static struct kv map[] = { 5403 { XPT_NOOP, "XPT_NOOP" }, 5404 { XPT_SCSI_IO, "XPT_SCSI_IO" }, 5405 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" }, 5406 { XPT_GDEVLIST, "XPT_GDEVLIST" }, 5407 { XPT_PATH_INQ, "XPT_PATH_INQ" }, 5408 { XPT_REL_SIMQ, "XPT_REL_SIMQ" }, 5409 { XPT_SASYNC_CB, "XPT_SASYNC_CB" }, 5410 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" }, 5411 { XPT_SCAN_BUS, "XPT_SCAN_BUS" }, 5412 { XPT_DEV_MATCH, "XPT_DEV_MATCH" }, 5413 { XPT_DEBUG, "XPT_DEBUG" }, 5414 { XPT_PATH_STATS, "XPT_PATH_STATS" }, 5415 { XPT_GDEV_STATS, "XPT_GDEV_STATS" }, 5416 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" }, 5417 { XPT_ASYNC, "XPT_ASYNC" }, 5418 { XPT_ABORT, "XPT_ABORT" }, 5419 { XPT_RESET_BUS, "XPT_RESET_BUS" }, 5420 { XPT_RESET_DEV, "XPT_RESET_DEV" }, 5421 { XPT_TERM_IO, "XPT_TERM_IO" }, 5422 { XPT_SCAN_LUN, "XPT_SCAN_LUN" }, 5423 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" }, 5424 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" }, 5425 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" }, 5426 { XPT_ATA_IO, "XPT_ATA_IO" }, 5427 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" }, 5428 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" }, 5429 { XPT_NVME_IO, "XPT_NVME_IO" }, 5430 { XPT_MMCSD_IO, "XPT_MMCSD_IO" }, 5431 { XPT_SMP_IO, "XPT_SMP_IO" }, 5432 { XPT_SCAN_TGT, "XPT_SCAN_TGT" }, 5433 { XPT_ENG_INQ, "XPT_ENG_INQ" }, 5434 { XPT_ENG_EXEC, "XPT_ENG_EXEC" }, 5435 { XPT_EN_LUN, "XPT_EN_LUN" }, 5436 { XPT_TARGET_IO, "XPT_TARGET_IO" }, 5437 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" }, 5438 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" }, 5439 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" }, 5440 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" }, 5441 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" }, 5442 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" }, 5443 { 0, 0 } 5444 }; 5445 5446 static const char * 5447 xpt_action_name(uint32_t action) 5448 { 5449 static char buffer[32]; /* Only for unknown messages -- racy */ 5450 struct kv *walker = map; 5451 5452 while (walker->name != NULL) { 5453 if (walker->v == action) 5454 return (walker->name); 5455 walker++; 5456 } 5457 5458 snprintf(buffer, sizeof(buffer), "%#x", action); 5459 return (buffer); 5460 } 5461