usb.c revision 1.168.2.1
1 /* $NetBSD: usb.c,v 1.168.2.1 2018/03/29 11:20:03 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002, 2008, 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at 9 * Carlstedt Research & Technology and Matthew R. Green (mrg (at) eterna.com.au). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * USB specifications and other documentation can be found at 35 * http://www.usb.org/developers/docs/ and 36 * http://www.usb.org/developers/devclass_docs/ 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.168.2.1 2018/03/29 11:20:03 pgoyette Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_usb.h" 44 #include "opt_compat_netbsd.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/kmem.h> 51 #include <sys/device.h> 52 #include <sys/kthread.h> 53 #include <sys/proc.h> 54 #include <sys/conf.h> 55 #include <sys/fcntl.h> 56 #include <sys/poll.h> 57 #include <sys/select.h> 58 #include <sys/vnode.h> 59 #include <sys/signalvar.h> 60 #include <sys/intr.h> 61 #include <sys/module.h> 62 #include <sys/mutex.h> 63 #include <sys/bus.h> 64 #include <sys/once.h> 65 #include <sys/atomic.h> 66 #include <sys/sysctl.h> 67 #include <sys/compat_stub.h> 68 69 #include <dev/usb/usb.h> 70 #include <dev/usb/usbdi.h> 71 #include <dev/usb/usbdi_util.h> 72 #include <dev/usb/usbdivar.h> 73 #include <dev/usb/usb_verbose.h> 74 #include <dev/usb/usb_quirks.h> 75 #include <dev/usb/usbhist.h> 76 77 #if defined(USB_DEBUG) 78 79 #ifndef USBHIST_SIZE 80 #define USBHIST_SIZE 50000 81 #endif 82 83 static struct kern_history_ent usbhistbuf[USBHIST_SIZE]; 84 USBHIST_DEFINE(usbhist) = KERNHIST_INITIALIZER(usbhist, usbhistbuf); 85 86 #endif 87 88 #define USB_DEV_MINOR 255 89 90 #ifdef USB_DEBUG 91 /* 92 * 0 - do usual exploration 93 * 1 - do not use timeout exploration 94 * >1 - do no exploration 95 */ 96 int usb_noexplore = 0; 97 98 int usbdebug = 0; 99 SYSCTL_SETUP(sysctl_hw_usb_setup, "sysctl hw.usb setup") 100 { 101 int err; 102 const struct sysctlnode *rnode; 103 const struct sysctlnode *cnode; 104 105 err = sysctl_createv(clog, 0, NULL, &rnode, 106 CTLFLAG_PERMANENT, CTLTYPE_NODE, "usb", 107 SYSCTL_DESCR("usb global controls"), 108 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); 109 110 if (err) 111 goto fail; 112 113 /* control debugging printfs */ 114 err = sysctl_createv(clog, 0, &rnode, &cnode, 115 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 116 "debug", SYSCTL_DESCR("Enable debugging output"), 117 NULL, 0, &usbdebug, sizeof(usbdebug), CTL_CREATE, CTL_EOL); 118 if (err) 119 goto fail; 120 121 return; 122 fail: 123 aprint_error("%s: sysctl_createv failed (err = %d)\n", __func__, err); 124 } 125 #else 126 #define usb_noexplore 0 127 #endif 128 129 #define DPRINTF(FMT,A,B,C,D) USBHIST_LOG(usbdebug,FMT,A,B,C,D) 130 #define DPRINTFN(N,FMT,A,B,C,D) USBHIST_LOGN(usbdebug,N,FMT,A,B,C,D) 131 132 struct usb_softc { 133 #if 0 134 device_t sc_dev; /* base device */ 135 #endif 136 struct usbd_bus *sc_bus; /* USB controller */ 137 struct usbd_port sc_port; /* dummy port for root hub */ 138 139 struct lwp *sc_event_thread; 140 141 char sc_dying; 142 }; 143 144 struct usb_taskq { 145 TAILQ_HEAD(, usb_task) tasks; 146 kmutex_t lock; 147 kcondvar_t cv; 148 struct lwp *task_thread_lwp; 149 const char *name; 150 }; 151 152 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 153 154 dev_type_open(usbopen); 155 dev_type_close(usbclose); 156 dev_type_read(usbread); 157 dev_type_ioctl(usbioctl); 158 dev_type_poll(usbpoll); 159 dev_type_kqfilter(usbkqfilter); 160 161 const struct cdevsw usb_cdevsw = { 162 .d_open = usbopen, 163 .d_close = usbclose, 164 .d_read = usbread, 165 .d_write = nowrite, 166 .d_ioctl = usbioctl, 167 .d_stop = nostop, 168 .d_tty = notty, 169 .d_poll = usbpoll, 170 .d_mmap = nommap, 171 .d_kqfilter = usbkqfilter, 172 .d_discard = nodiscard, 173 .d_flag = D_OTHER 174 }; 175 176 Static void usb_discover(struct usb_softc *); 177 Static void usb_create_event_thread(device_t); 178 Static void usb_event_thread(void *); 179 Static void usb_task_thread(void *); 180 181 #define USB_MAX_EVENTS 100 182 struct usb_event_q { 183 struct usb_event ue; 184 SIMPLEQ_ENTRY(usb_event_q) next; 185 }; 186 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 187 SIMPLEQ_HEAD_INITIALIZER(usb_events); 188 Static int usb_nevents = 0; 189 Static struct selinfo usb_selevent; 190 Static kmutex_t usb_event_lock; 191 Static kcondvar_t usb_event_cv; 192 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 193 Static void *usb_async_sih; 194 Static int usb_dev_open = 0; 195 Static struct usb_event *usb_alloc_event(void); 196 Static void usb_free_event(struct usb_event *); 197 Static void usb_add_event(int, struct usb_event *); 198 Static int usb_get_next_event(struct usb_event *); 199 Static void usb_async_intr(void *); 200 Static void usb_soft_intr(void *); 201 202 Static const char *usbrev_str[] = USBREV_STR; 203 204 static int usb_match(device_t, cfdata_t, void *); 205 static void usb_attach(device_t, device_t, void *); 206 static int usb_detach(device_t, int); 207 static int usb_activate(device_t, enum devact); 208 static void usb_childdet(device_t, device_t); 209 static int usb_once_init(void); 210 static void usb_doattach(device_t); 211 212 extern struct cfdriver usb_cd; 213 214 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 215 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 216 DVF_DETACH_SHUTDOWN); 217 218 static const char *taskq_names[] = USB_TASKQ_NAMES; 219 220 int 221 usb_match(device_t parent, cfdata_t match, void *aux) 222 { 223 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 224 225 return UMATCH_GENERIC; 226 } 227 228 void 229 usb_attach(device_t parent, device_t self, void *aux) 230 { 231 static ONCE_DECL(init_control); 232 struct usb_softc *sc = device_private(self); 233 int usbrev; 234 235 sc->sc_bus = aux; 236 usbrev = sc->sc_bus->ub_revision; 237 238 aprint_naive("\n"); 239 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 240 switch (usbrev) { 241 case USBREV_1_0: 242 case USBREV_1_1: 243 case USBREV_2_0: 244 case USBREV_3_0: 245 break; 246 default: 247 aprint_error(", not supported\n"); 248 sc->sc_dying = 1; 249 return; 250 } 251 aprint_normal("\n"); 252 253 /* XXX we should have our own level */ 254 sc->sc_bus->ub_soft = softint_establish(SOFTINT_USB | SOFTINT_MPSAFE, 255 usb_soft_intr, sc->sc_bus); 256 if (sc->sc_bus->ub_soft == NULL) { 257 aprint_error("%s: can't register softintr\n", 258 device_xname(self)); 259 sc->sc_dying = 1; 260 return; 261 } 262 263 sc->sc_bus->ub_methods->ubm_getlock(sc->sc_bus, &sc->sc_bus->ub_lock); 264 KASSERT(sc->sc_bus->ub_lock != NULL); 265 266 RUN_ONCE(&init_control, usb_once_init); 267 config_interrupts(self, usb_doattach); 268 } 269 270 static int 271 usb_once_init(void) 272 { 273 struct usb_taskq *taskq; 274 int i; 275 276 USBHIST_LINK_STATIC(usbhist); 277 278 selinit(&usb_selevent); 279 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 280 cv_init(&usb_event_cv, "usbrea"); 281 282 for (i = 0; i < USB_NUM_TASKQS; i++) { 283 taskq = &usb_taskq[i]; 284 285 TAILQ_INIT(&taskq->tasks); 286 /* 287 * Since USB task methods usb_{add,rem}_task are callable 288 * from any context, we have to make this lock a spinlock. 289 */ 290 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 291 cv_init(&taskq->cv, "usbtsk"); 292 taskq->name = taskq_names[i]; 293 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 294 usb_task_thread, taskq, &taskq->task_thread_lwp, 295 "%s", taskq->name)) { 296 printf("unable to create task thread: %s\n", taskq->name); 297 panic("usb_create_event_thread task"); 298 } 299 /* 300 * XXX we should make sure these threads are alive before 301 * end up using them in usb_doattach(). 302 */ 303 } 304 return 0; 305 } 306 307 static void 308 usb_doattach(device_t self) 309 { 310 struct usb_softc *sc = device_private(self); 311 struct usbd_device *dev; 312 usbd_status err; 313 int speed; 314 struct usb_event *ue; 315 316 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 317 318 sc->sc_bus->ub_usbctl = self; 319 sc->sc_port.up_power = USB_MAX_POWER; 320 321 switch (sc->sc_bus->ub_revision) { 322 case USBREV_1_0: 323 case USBREV_1_1: 324 speed = USB_SPEED_FULL; 325 break; 326 case USBREV_2_0: 327 speed = USB_SPEED_HIGH; 328 break; 329 case USBREV_3_0: 330 speed = USB_SPEED_SUPER; 331 break; 332 default: 333 panic("usb_doattach"); 334 } 335 336 cv_init(&sc->sc_bus->ub_needsexplore_cv, "usbevt"); 337 338 ue = usb_alloc_event(); 339 ue->u.ue_ctrlr.ue_bus = device_unit(self); 340 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 341 342 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 343 &sc->sc_port); 344 if (!err) { 345 dev = sc->sc_port.up_dev; 346 if (dev->ud_hub == NULL) { 347 sc->sc_dying = 1; 348 aprint_error("%s: root device is not a hub\n", 349 device_xname(self)); 350 return; 351 } 352 sc->sc_bus->ub_roothub = dev; 353 usb_create_event_thread(self); 354 #if 1 355 /* 356 * Turning this code off will delay attachment of USB devices 357 * until the USB event thread is running, which means that 358 * the keyboard will not work until after cold boot. 359 */ 360 if (cold && (device_cfdata(self)->cf_flags & 1)) 361 dev->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 362 #endif 363 } else { 364 aprint_error("%s: root hub problem, error=%s\n", 365 device_xname(self), usbd_errstr(err)); 366 sc->sc_dying = 1; 367 } 368 369 config_pending_incr(self); 370 371 if (!pmf_device_register(self, NULL, NULL)) 372 aprint_error_dev(self, "couldn't establish power handler\n"); 373 374 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 375 usb_async_intr, NULL); 376 377 return; 378 } 379 380 void 381 usb_create_event_thread(device_t self) 382 { 383 struct usb_softc *sc = device_private(self); 384 385 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 386 usb_event_thread, sc, &sc->sc_event_thread, 387 "%s", device_xname(self))) { 388 printf("%s: unable to create event thread for\n", 389 device_xname(self)); 390 panic("usb_create_event_thread"); 391 } 392 } 393 394 /* 395 * Add a task to be performed by the task thread. This function can be 396 * called from any context and the task will be executed in a process 397 * context ASAP. 398 */ 399 void 400 usb_add_task(struct usbd_device *dev, struct usb_task *task, int queue) 401 { 402 struct usb_taskq *taskq; 403 404 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 405 406 KASSERT(0 <= queue); 407 KASSERT(queue < USB_NUM_TASKQS); 408 taskq = &usb_taskq[queue]; 409 mutex_enter(&taskq->lock); 410 if (atomic_cas_uint(&task->queue, USB_NUM_TASKQS, queue) == 411 USB_NUM_TASKQS) { 412 DPRINTFN(2, "task=%#jx", (uintptr_t)task, 0, 0, 0); 413 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 414 cv_signal(&taskq->cv); 415 } else { 416 DPRINTFN(2, "task=%#jx on q", (uintptr_t)task, 0, 0, 0); 417 } 418 mutex_exit(&taskq->lock); 419 } 420 421 /* 422 * XXX This does not wait for completion! Most uses need such an 423 * operation. Urgh... 424 */ 425 void 426 usb_rem_task(struct usbd_device *dev, struct usb_task *task) 427 { 428 unsigned queue; 429 430 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 431 432 while ((queue = task->queue) != USB_NUM_TASKQS) { 433 struct usb_taskq *taskq = &usb_taskq[queue]; 434 mutex_enter(&taskq->lock); 435 if (__predict_true(task->queue == queue)) { 436 TAILQ_REMOVE(&taskq->tasks, task, next); 437 task->queue = USB_NUM_TASKQS; 438 mutex_exit(&taskq->lock); 439 break; 440 } 441 mutex_exit(&taskq->lock); 442 } 443 } 444 445 void 446 usb_event_thread(void *arg) 447 { 448 struct usb_softc *sc = arg; 449 450 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 451 452 /* 453 * In case this controller is a companion controller to an 454 * EHCI controller we need to wait until the EHCI controller 455 * has grabbed the port. 456 * XXX It would be nicer to do this with a tsleep(), but I don't 457 * know how to synchronize the creation of the threads so it 458 * will work. 459 */ 460 usb_delay_ms(sc->sc_bus, 500); 461 462 /* Make sure first discover does something. */ 463 mutex_enter(sc->sc_bus->ub_lock); 464 sc->sc_bus->ub_needsexplore = 1; 465 usb_discover(sc); 466 mutex_exit(sc->sc_bus->ub_lock); 467 config_pending_decr(sc->sc_bus->ub_usbctl); 468 469 mutex_enter(sc->sc_bus->ub_lock); 470 while (!sc->sc_dying) { 471 if (usb_noexplore < 2) 472 usb_discover(sc); 473 474 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 475 sc->sc_bus->ub_lock, usb_noexplore ? 0 : hz * 60); 476 477 DPRINTFN(2, "sc %#jx woke up", (uintptr_t)sc, 0, 0, 0); 478 } 479 sc->sc_event_thread = NULL; 480 481 /* In case parent is waiting for us to exit. */ 482 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 483 mutex_exit(sc->sc_bus->ub_lock); 484 485 DPRINTF("sc %#jx exit", (uintptr_t)sc, 0, 0, 0); 486 kthread_exit(0); 487 } 488 489 void 490 usb_task_thread(void *arg) 491 { 492 struct usb_task *task; 493 struct usb_taskq *taskq; 494 bool mpsafe; 495 496 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 497 498 taskq = arg; 499 DPRINTF("start taskq %#jx", (uintptr_t)taskq, 0, 0, 0); 500 501 mutex_enter(&taskq->lock); 502 for (;;) { 503 task = TAILQ_FIRST(&taskq->tasks); 504 if (task == NULL) { 505 cv_wait(&taskq->cv, &taskq->lock); 506 task = TAILQ_FIRST(&taskq->tasks); 507 } 508 DPRINTFN(2, "woke up task=%#jx", (uintptr_t)task, 0, 0, 0); 509 if (task != NULL) { 510 mpsafe = ISSET(task->flags, USB_TASKQ_MPSAFE); 511 TAILQ_REMOVE(&taskq->tasks, task, next); 512 task->queue = USB_NUM_TASKQS; 513 mutex_exit(&taskq->lock); 514 515 if (!mpsafe) 516 KERNEL_LOCK(1, curlwp); 517 task->fun(task->arg); 518 /* Can't dereference task after this point. */ 519 if (!mpsafe) 520 KERNEL_UNLOCK_ONE(curlwp); 521 522 mutex_enter(&taskq->lock); 523 } 524 } 525 mutex_exit(&taskq->lock); 526 } 527 528 int 529 usbctlprint(void *aux, const char *pnp) 530 { 531 /* only "usb"es can attach to host controllers */ 532 if (pnp) 533 aprint_normal("usb at %s", pnp); 534 535 return UNCONF; 536 } 537 538 int 539 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 540 { 541 int unit = minor(dev); 542 struct usb_softc *sc; 543 544 if (unit == USB_DEV_MINOR) { 545 if (usb_dev_open) 546 return EBUSY; 547 usb_dev_open = 1; 548 mutex_enter(proc_lock); 549 usb_async_proc = 0; 550 mutex_exit(proc_lock); 551 return 0; 552 } 553 554 sc = device_lookup_private(&usb_cd, unit); 555 if (!sc) 556 return ENXIO; 557 558 if (sc->sc_dying) 559 return EIO; 560 561 return 0; 562 } 563 564 int 565 usbread(dev_t dev, struct uio *uio, int flag) 566 { 567 struct usb_event *ue; 568 struct usb_event_old *ueo = NULL; /* XXXGCC */ 569 int useold = 0; 570 int error, n; 571 572 if (minor(dev) != USB_DEV_MINOR) 573 return ENXIO; 574 575 switch (uio->uio_resid) { 576 case sizeof(struct usb_event_old): 577 ueo = kmem_zalloc(sizeof(struct usb_event_old), KM_SLEEP); 578 useold = 1; 579 /* FALLTHRU */ 580 case sizeof(struct usb_event): 581 ue = usb_alloc_event(); 582 break; 583 default: 584 return EINVAL; 585 } 586 587 error = 0; 588 mutex_enter(&usb_event_lock); 589 for (;;) { 590 n = usb_get_next_event(ue); 591 if (n != 0) 592 break; 593 if (flag & IO_NDELAY) { 594 error = EWOULDBLOCK; 595 break; 596 } 597 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 598 if (error) 599 break; 600 } 601 mutex_exit(&usb_event_lock); 602 if (!error) { 603 if (useold) { /* copy fields to old struct */ 604 error = (*usb30_copy_to_old)(ue, ueo, uio); 605 if (error == ENOSYS) 606 error = EINVAL; 607 608 if (!error) 609 error = uiomove((void *)ueo, sizeof(*ueo), uio); 610 } else 611 error = uiomove((void *)ue, sizeof(*ue), uio); 612 } 613 usb_free_event(ue); 614 if (ueo) 615 kmem_free(ueo, sizeof(struct usb_event_old)); 616 617 return error; 618 } 619 620 int 621 usbclose(dev_t dev, int flag, int mode, 622 struct lwp *l) 623 { 624 int unit = minor(dev); 625 626 if (unit == USB_DEV_MINOR) { 627 mutex_enter(proc_lock); 628 usb_async_proc = 0; 629 mutex_exit(proc_lock); 630 usb_dev_open = 0; 631 } 632 633 return 0; 634 } 635 636 int 637 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 638 { 639 struct usb_softc *sc; 640 int unit = minor(devt); 641 642 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 643 644 if (unit == USB_DEV_MINOR) { 645 switch (cmd) { 646 case FIONBIO: 647 /* All handled in the upper FS layer. */ 648 return 0; 649 650 case FIOASYNC: 651 mutex_enter(proc_lock); 652 if (*(int *)data) 653 usb_async_proc = l->l_proc; 654 else 655 usb_async_proc = 0; 656 mutex_exit(proc_lock); 657 return 0; 658 659 default: 660 return EINVAL; 661 } 662 } 663 664 sc = device_lookup_private(&usb_cd, unit); 665 666 if (sc->sc_dying) 667 return EIO; 668 669 int error = 0; 670 DPRINTF("cmd %#jx", cmd, 0, 0, 0); 671 switch (cmd) { 672 #ifdef USB_DEBUG 673 case USB_SETDEBUG: 674 if (!(flag & FWRITE)) 675 return EBADF; 676 usbdebug = ((*(int *)data) & 0x000000ff); 677 break; 678 #endif /* USB_DEBUG */ 679 case USB_REQUEST: 680 { 681 struct usb_ctl_request *ur = (void *)data; 682 int len = UGETW(ur->ucr_request.wLength); 683 struct iovec iov; 684 struct uio uio; 685 void *ptr = 0; 686 int addr = ur->ucr_addr; 687 usbd_status err; 688 689 if (!(flag & FWRITE)) { 690 error = EBADF; 691 goto fail; 692 } 693 694 DPRINTF("USB_REQUEST addr=%jd len=%jd", addr, len, 0, 0); 695 if (len < 0 || len > 32768) { 696 error = EINVAL; 697 goto fail; 698 } 699 if (addr < 0 || addr >= USB_MAX_DEVICES) { 700 error = EINVAL; 701 goto fail; 702 } 703 size_t dindex = usb_addr2dindex(addr); 704 if (sc->sc_bus->ub_devices[dindex] == NULL) { 705 error = EINVAL; 706 goto fail; 707 } 708 if (len != 0) { 709 iov.iov_base = (void *)ur->ucr_data; 710 iov.iov_len = len; 711 uio.uio_iov = &iov; 712 uio.uio_iovcnt = 1; 713 uio.uio_resid = len; 714 uio.uio_offset = 0; 715 uio.uio_rw = 716 ur->ucr_request.bmRequestType & UT_READ ? 717 UIO_READ : UIO_WRITE; 718 uio.uio_vmspace = l->l_proc->p_vmspace; 719 ptr = kmem_alloc(len, KM_SLEEP); 720 if (uio.uio_rw == UIO_WRITE) { 721 error = uiomove(ptr, len, &uio); 722 if (error) 723 goto ret; 724 } 725 } 726 err = usbd_do_request_flags(sc->sc_bus->ub_devices[dindex], 727 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 728 USBD_DEFAULT_TIMEOUT); 729 if (err) { 730 error = EIO; 731 goto ret; 732 } 733 if (len > ur->ucr_actlen) 734 len = ur->ucr_actlen; 735 if (len != 0) { 736 if (uio.uio_rw == UIO_READ) { 737 error = uiomove(ptr, len, &uio); 738 if (error) 739 goto ret; 740 } 741 } 742 ret: 743 if (ptr) { 744 len = UGETW(ur->ucr_request.wLength); 745 kmem_free(ptr, len); 746 } 747 break; 748 } 749 750 case USB_DEVICEINFO: 751 { 752 struct usbd_device *dev; 753 struct usb_device_info *di = (void *)data; 754 int addr = di->udi_addr; 755 756 if (addr < 0 || addr >= USB_MAX_DEVICES) { 757 error = EINVAL; 758 goto fail; 759 } 760 size_t dindex = usb_addr2dindex(addr); 761 if ((dev = sc->sc_bus->ub_devices[dindex]) == NULL) { 762 error = ENXIO; 763 goto fail; 764 } 765 usbd_fill_deviceinfo(dev, di, 1); 766 break; 767 } 768 769 case USB_DEVICEINFO_OLD: 770 { 771 struct usbd_device *dev; 772 struct usb_device_info_old *di = (void *)data; 773 int addr = di->udi_addr; 774 775 if (addr < 1 || addr >= USB_MAX_DEVICES) { 776 error = EINVAL; 777 goto fail; 778 } 779 size_t dindex = usb_addr2dindex(addr); 780 if ((dev = sc->sc_bus->ub_devices[dindex]) == NULL) { 781 error = ENXIO; 782 goto fail; 783 } 784 error = (*usbd30_fill_deviceinfo_old)(dev, di, 1); 785 if (error == ENOSYS) 786 error = EINVAL; 787 if (error) 788 goto fail; 789 } 790 791 case USB_DEVICESTATS: 792 *(struct usb_device_stats *)data = sc->sc_bus->ub_stats; 793 break; 794 795 default: 796 error = EINVAL; 797 } 798 799 fail: 800 801 DPRINTF("... done (error = %jd)", error, 0, 0, 0); 802 803 return error; 804 } 805 806 int 807 usbpoll(dev_t dev, int events, struct lwp *l) 808 { 809 int revents, mask; 810 811 if (minor(dev) == USB_DEV_MINOR) { 812 revents = 0; 813 mask = POLLIN | POLLRDNORM; 814 815 mutex_enter(&usb_event_lock); 816 if (events & mask && usb_nevents > 0) 817 revents |= events & mask; 818 if (revents == 0 && events & mask) 819 selrecord(l, &usb_selevent); 820 mutex_exit(&usb_event_lock); 821 822 return revents; 823 } else { 824 return 0; 825 } 826 } 827 828 static void 829 filt_usbrdetach(struct knote *kn) 830 { 831 832 mutex_enter(&usb_event_lock); 833 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 834 mutex_exit(&usb_event_lock); 835 } 836 837 static int 838 filt_usbread(struct knote *kn, long hint) 839 { 840 841 if (usb_nevents == 0) 842 return 0; 843 844 kn->kn_data = sizeof(struct usb_event); 845 return 1; 846 } 847 848 static const struct filterops usbread_filtops = { 849 .f_isfd = 1, 850 .f_attach = NULL, 851 .f_detach = filt_usbrdetach, 852 .f_event = filt_usbread, 853 }; 854 855 int 856 usbkqfilter(dev_t dev, struct knote *kn) 857 { 858 struct klist *klist; 859 860 switch (kn->kn_filter) { 861 case EVFILT_READ: 862 if (minor(dev) != USB_DEV_MINOR) 863 return 1; 864 klist = &usb_selevent.sel_klist; 865 kn->kn_fop = &usbread_filtops; 866 break; 867 868 default: 869 return EINVAL; 870 } 871 872 kn->kn_hook = NULL; 873 874 mutex_enter(&usb_event_lock); 875 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 876 mutex_exit(&usb_event_lock); 877 878 return 0; 879 } 880 881 /* Explore device tree from the root. */ 882 Static void 883 usb_discover(struct usb_softc *sc) 884 { 885 886 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 887 888 KASSERT(mutex_owned(sc->sc_bus->ub_lock)); 889 890 if (usb_noexplore > 1) 891 return; 892 /* 893 * We need mutual exclusion while traversing the device tree, 894 * but this is guaranteed since this function is only called 895 * from the event thread for the controller. 896 * 897 * Also, we now have sc_bus->ub_lock held. 898 */ 899 while (sc->sc_bus->ub_needsexplore && !sc->sc_dying) { 900 sc->sc_bus->ub_needsexplore = 0; 901 mutex_exit(sc->sc_bus->ub_lock); 902 sc->sc_bus->ub_roothub->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 903 mutex_enter(sc->sc_bus->ub_lock); 904 } 905 } 906 907 void 908 usb_needs_explore(struct usbd_device *dev) 909 { 910 911 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 912 913 mutex_enter(dev->ud_bus->ub_lock); 914 dev->ud_bus->ub_needsexplore = 1; 915 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 916 mutex_exit(dev->ud_bus->ub_lock); 917 } 918 919 void 920 usb_needs_reattach(struct usbd_device *dev) 921 { 922 923 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 924 925 mutex_enter(dev->ud_bus->ub_lock); 926 dev->ud_powersrc->up_reattach = 1; 927 dev->ud_bus->ub_needsexplore = 1; 928 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 929 mutex_exit(dev->ud_bus->ub_lock); 930 } 931 932 /* Called at with usb_event_lock held. */ 933 int 934 usb_get_next_event(struct usb_event *ue) 935 { 936 struct usb_event_q *ueq; 937 938 KASSERT(mutex_owned(&usb_event_lock)); 939 940 if (usb_nevents <= 0) 941 return 0; 942 ueq = SIMPLEQ_FIRST(&usb_events); 943 #ifdef DIAGNOSTIC 944 if (ueq == NULL) { 945 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 946 usb_nevents = 0; 947 return 0; 948 } 949 #endif 950 if (ue) 951 *ue = ueq->ue; 952 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 953 usb_free_event((struct usb_event *)(void *)ueq); 954 usb_nevents--; 955 return 1; 956 } 957 958 void 959 usbd_add_dev_event(int type, struct usbd_device *udev) 960 { 961 struct usb_event *ue = usb_alloc_event(); 962 963 usbd_fill_deviceinfo(udev, &ue->u.ue_device, false); 964 usb_add_event(type, ue); 965 } 966 967 void 968 usbd_add_drv_event(int type, struct usbd_device *udev, device_t dev) 969 { 970 struct usb_event *ue = usb_alloc_event(); 971 972 ue->u.ue_driver.ue_cookie = udev->ud_cookie; 973 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 974 sizeof(ue->u.ue_driver.ue_devname)); 975 usb_add_event(type, ue); 976 } 977 978 Static struct usb_event * 979 usb_alloc_event(void) 980 { 981 /* Yes, this is right; we allocate enough so that we can use it later */ 982 return kmem_zalloc(sizeof(struct usb_event_q), KM_SLEEP); 983 } 984 985 Static void 986 usb_free_event(struct usb_event *uep) 987 { 988 kmem_free(uep, sizeof(struct usb_event_q)); 989 } 990 991 Static void 992 usb_add_event(int type, struct usb_event *uep) 993 { 994 struct usb_event_q *ueq; 995 struct timeval thetime; 996 997 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 998 999 microtime(&thetime); 1000 /* Don't want to wait here with usb_event_lock held */ 1001 ueq = (struct usb_event_q *)(void *)uep; 1002 ueq->ue = *uep; 1003 ueq->ue.ue_type = type; 1004 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 1005 1006 mutex_enter(&usb_event_lock); 1007 if (++usb_nevents >= USB_MAX_EVENTS) { 1008 /* Too many queued events, drop an old one. */ 1009 DPRINTF("event dropped", 0, 0, 0, 0); 1010 (void)usb_get_next_event(0); 1011 } 1012 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 1013 cv_signal(&usb_event_cv); 1014 selnotify(&usb_selevent, 0, 0); 1015 if (usb_async_proc != NULL) { 1016 kpreempt_disable(); 1017 softint_schedule(usb_async_sih); 1018 kpreempt_enable(); 1019 } 1020 mutex_exit(&usb_event_lock); 1021 } 1022 1023 Static void 1024 usb_async_intr(void *cookie) 1025 { 1026 proc_t *proc; 1027 1028 mutex_enter(proc_lock); 1029 if ((proc = usb_async_proc) != NULL) 1030 psignal(proc, SIGIO); 1031 mutex_exit(proc_lock); 1032 } 1033 1034 Static void 1035 usb_soft_intr(void *arg) 1036 { 1037 struct usbd_bus *bus = arg; 1038 1039 mutex_enter(bus->ub_lock); 1040 bus->ub_methods->ubm_softint(bus); 1041 mutex_exit(bus->ub_lock); 1042 } 1043 1044 void 1045 usb_schedsoftintr(struct usbd_bus *bus) 1046 { 1047 1048 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 1049 1050 DPRINTFN(10, "polling=%jd", bus->ub_usepolling, 0, 0, 0); 1051 1052 if (bus->ub_usepolling) { 1053 bus->ub_methods->ubm_softint(bus); 1054 } else { 1055 kpreempt_disable(); 1056 softint_schedule(bus->ub_soft); 1057 kpreempt_enable(); 1058 } 1059 } 1060 1061 int 1062 usb_activate(device_t self, enum devact act) 1063 { 1064 struct usb_softc *sc = device_private(self); 1065 1066 switch (act) { 1067 case DVACT_DEACTIVATE: 1068 sc->sc_dying = 1; 1069 return 0; 1070 default: 1071 return EOPNOTSUPP; 1072 } 1073 } 1074 1075 void 1076 usb_childdet(device_t self, device_t child) 1077 { 1078 int i; 1079 struct usb_softc *sc = device_private(self); 1080 struct usbd_device *dev; 1081 1082 if ((dev = sc->sc_port.up_dev) == NULL || dev->ud_subdevlen == 0) 1083 return; 1084 1085 for (i = 0; i < dev->ud_subdevlen; i++) 1086 if (dev->ud_subdevs[i] == child) 1087 dev->ud_subdevs[i] = NULL; 1088 } 1089 1090 int 1091 usb_detach(device_t self, int flags) 1092 { 1093 struct usb_softc *sc = device_private(self); 1094 struct usb_event *ue; 1095 int rc; 1096 1097 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 1098 1099 /* Make all devices disconnect. */ 1100 if (sc->sc_port.up_dev != NULL && 1101 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1102 return rc; 1103 1104 pmf_device_deregister(self); 1105 /* Kill off event thread. */ 1106 sc->sc_dying = 1; 1107 while (sc->sc_event_thread != NULL) { 1108 mutex_enter(sc->sc_bus->ub_lock); 1109 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 1110 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 1111 sc->sc_bus->ub_lock, hz * 60); 1112 mutex_exit(sc->sc_bus->ub_lock); 1113 } 1114 DPRINTF("event thread dead", 0, 0, 0, 0); 1115 1116 if (sc->sc_bus->ub_soft != NULL) { 1117 softint_disestablish(sc->sc_bus->ub_soft); 1118 sc->sc_bus->ub_soft = NULL; 1119 } 1120 1121 ue = usb_alloc_event(); 1122 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1123 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1124 1125 cv_destroy(&sc->sc_bus->ub_needsexplore_cv); 1126 1127 return 0; 1128 } 1129
Indexes created Mon Sep 29 03:10:08 GMT 2025