1 /* 2 * Copyright (c) 1997,1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/kern/subr_bus.c,v 1.54.2.9 2002/10/10 15:13:32 jhb Exp $ 27 * $DragonFly: src/sys/kern/subr_bus.c,v 1.46 2008/10/03 00:26:21 hasso Exp $ 28 */ 29 30 #include "opt_bus.h" 31 32 #include <sys/param.h> 33 #include <sys/queue.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/kobj.h> 38 #include <sys/bus_private.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/rman.h> 43 #include <sys/device.h> 44 #include <sys/lock.h> 45 #include <sys/conf.h> 46 #include <sys/selinfo.h> 47 #include <sys/uio.h> 48 #include <sys/filio.h> 49 #include <sys/poll.h> 50 #include <sys/signalvar.h> 51 52 #include <machine/stdarg.h> /* for device_printf() */ 53 54 #include <sys/thread2.h> 55 56 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 57 58 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 59 60 #ifdef BUS_DEBUG 61 #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n")) 62 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 63 #define DRIVERNAME(d) ((d)? d->name : "no driver") 64 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 65 66 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 67 * prevent syslog from deleting initial spaces 68 */ 69 #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0) 70 71 static void print_device_short(device_t dev, int indent); 72 static void print_device(device_t dev, int indent); 73 void print_device_tree_short(device_t dev, int indent); 74 void print_device_tree(device_t dev, int indent); 75 static void print_driver_short(driver_t *driver, int indent); 76 static void print_driver(driver_t *driver, int indent); 77 static void print_driver_list(driver_list_t drivers, int indent); 78 static void print_devclass_short(devclass_t dc, int indent); 79 static void print_devclass(devclass_t dc, int indent); 80 void print_devclass_list_short(void); 81 void print_devclass_list(void); 82 83 #else 84 /* Make the compiler ignore the function calls */ 85 #define PDEBUG(a) /* nop */ 86 #define DEVICENAME(d) /* nop */ 87 #define DRIVERNAME(d) /* nop */ 88 #define DEVCLANAME(d) /* nop */ 89 90 #define print_device_short(d,i) /* nop */ 91 #define print_device(d,i) /* nop */ 92 #define print_device_tree_short(d,i) /* nop */ 93 #define print_device_tree(d,i) /* nop */ 94 #define print_driver_short(d,i) /* nop */ 95 #define print_driver(d,i) /* nop */ 96 #define print_driver_list(d,i) /* nop */ 97 #define print_devclass_short(d,i) /* nop */ 98 #define print_devclass(d,i) /* nop */ 99 #define print_devclass_list_short() /* nop */ 100 #define print_devclass_list() /* nop */ 101 #endif 102 103 static void device_attach_async(device_t dev); 104 static void device_attach_thread(void *arg); 105 static int device_doattach(device_t dev); 106 107 static int do_async_attach = 0; 108 static int numasyncthreads; 109 TUNABLE_INT("kern.do_async_attach", &do_async_attach); 110 111 /* 112 * /dev/devctl implementation 113 */ 114 115 /* 116 * This design allows only one reader for /dev/devctl. This is not desirable 117 * in the long run, but will get a lot of hair out of this implementation. 118 * Maybe we should make this device a clonable device. 119 * 120 * Also note: we specifically do not attach a device to the device_t tree 121 * to avoid potential chicken and egg problems. One could argue that all 122 * of this belongs to the root node. One could also further argue that the 123 * sysctl interface that we have not might more properly be an ioctl 124 * interface, but at this stage of the game, I'm not inclined to rock that 125 * boat. 126 * 127 * I'm also not sure that the SIGIO support is done correctly or not, as 128 * I copied it from a driver that had SIGIO support that likely hasn't been 129 * tested since 3.4 or 2.2.8! 130 */ 131 132 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 133 static int devctl_disable = 0; 134 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 135 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0, 136 sysctl_devctl_disable, "I", "devctl disable"); 137 138 #define CDEV_MAJOR 188 139 140 static d_open_t devopen; 141 static d_close_t devclose; 142 static d_read_t devread; 143 static d_ioctl_t devioctl; 144 static d_poll_t devpoll; 145 146 static struct dev_ops devctl_ops = { 147 { "devctl", CDEV_MAJOR, 0 }, 148 .d_open = devopen, 149 .d_close = devclose, 150 .d_read = devread, 151 .d_ioctl = devioctl, 152 .d_poll = devpoll, 153 }; 154 155 struct dev_event_info 156 { 157 char *dei_data; 158 TAILQ_ENTRY(dev_event_info) dei_link; 159 }; 160 161 TAILQ_HEAD(devq, dev_event_info); 162 163 static struct dev_softc 164 { 165 int inuse; 166 int nonblock; 167 struct lock lock; 168 struct selinfo sel; 169 struct devq devq; 170 struct proc *async_proc; 171 } devsoftc; 172 173 static void 174 devinit(void) 175 { 176 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl"); 177 lockinit(&devsoftc.lock, "dev mtx", 0, 0); 178 TAILQ_INIT(&devsoftc.devq); 179 } 180 181 static int 182 devopen(struct dev_open_args *ap) 183 { 184 if (devsoftc.inuse) 185 return (EBUSY); 186 /* move to init */ 187 devsoftc.inuse = 1; 188 devsoftc.nonblock = 0; 189 devsoftc.async_proc = NULL; 190 return (0); 191 } 192 193 static int 194 devclose(struct dev_close_args *ap) 195 { 196 devsoftc.inuse = 0; 197 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 198 wakeup(&devsoftc); 199 lockmgr(&devsoftc.lock, LK_RELEASE); 200 201 return (0); 202 } 203 204 /* 205 * The read channel for this device is used to report changes to 206 * userland in realtime. We are required to free the data as well as 207 * the n1 object because we allocate them separately. Also note that 208 * we return one record at a time. If you try to read this device a 209 * character at a time, you will lose the rest of the data. Listening 210 * programs are expected to cope. 211 */ 212 static int 213 devread(struct dev_read_args *ap) 214 { 215 struct uio *uio = ap->a_uio; 216 struct dev_event_info *n1; 217 int rv; 218 219 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 220 while (TAILQ_EMPTY(&devsoftc.devq)) { 221 if (devsoftc.nonblock) { 222 lockmgr(&devsoftc.lock, LK_RELEASE); 223 return (EAGAIN); 224 } 225 tsleep_interlock(&devsoftc, PCATCH); 226 lockmgr(&devsoftc.lock, LK_RELEASE); 227 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0); 228 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 229 if (rv) { 230 /* 231 * Need to translate ERESTART to EINTR here? -- jake 232 */ 233 lockmgr(&devsoftc.lock, LK_RELEASE); 234 return (rv); 235 } 236 } 237 n1 = TAILQ_FIRST(&devsoftc.devq); 238 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 239 lockmgr(&devsoftc.lock, LK_RELEASE); 240 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 241 kfree(n1->dei_data, M_BUS); 242 kfree(n1, M_BUS); 243 return (rv); 244 } 245 246 static int 247 devioctl(struct dev_ioctl_args *ap) 248 { 249 switch (ap->a_cmd) { 250 251 case FIONBIO: 252 if (*(int*)ap->a_data) 253 devsoftc.nonblock = 1; 254 else 255 devsoftc.nonblock = 0; 256 return (0); 257 case FIOASYNC: 258 if (*(int*)ap->a_data) 259 devsoftc.async_proc = curproc; 260 else 261 devsoftc.async_proc = NULL; 262 return (0); 263 264 /* (un)Support for other fcntl() calls. */ 265 case FIOCLEX: 266 case FIONCLEX: 267 case FIONREAD: 268 case FIOSETOWN: 269 case FIOGETOWN: 270 default: 271 break; 272 } 273 return (ENOTTY); 274 } 275 276 static int 277 devpoll(struct dev_poll_args *ap) 278 { 279 int revents = 0; 280 281 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 282 if (ap->a_events & (POLLIN | POLLRDNORM)) { 283 if (!TAILQ_EMPTY(&devsoftc.devq)) 284 revents = ap->a_events & (POLLIN | POLLRDNORM); 285 else 286 selrecord(curthread, &devsoftc.sel); 287 } 288 lockmgr(&devsoftc.lock, LK_RELEASE); 289 290 ap->a_events = revents; 291 return (0); 292 } 293 294 /** 295 * @brief Return whether the userland process is running 296 */ 297 boolean_t 298 devctl_process_running(void) 299 { 300 return (devsoftc.inuse == 1); 301 } 302 303 /** 304 * @brief Queue data to be read from the devctl device 305 * 306 * Generic interface to queue data to the devctl device. It is 307 * assumed that @p data is properly formatted. It is further assumed 308 * that @p data is allocated using the M_BUS malloc type. 309 */ 310 void 311 devctl_queue_data(char *data) 312 { 313 struct dev_event_info *n1 = NULL; 314 struct proc *p; 315 316 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT); 317 if (n1 == NULL) 318 return; 319 n1->dei_data = data; 320 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 321 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 322 wakeup(&devsoftc); 323 lockmgr(&devsoftc.lock, LK_RELEASE); 324 get_mplock(); /* XXX */ 325 selwakeup(&devsoftc.sel); 326 rel_mplock(); /* XXX */ 327 p = devsoftc.async_proc; 328 if (p != NULL) 329 ksignal(p, SIGIO); 330 } 331 332 /** 333 * @brief Send a 'notification' to userland, using standard ways 334 */ 335 void 336 devctl_notify(const char *system, const char *subsystem, const char *type, 337 const char *data) 338 { 339 int len = 0; 340 char *msg; 341 342 if (system == NULL) 343 return; /* BOGUS! Must specify system. */ 344 if (subsystem == NULL) 345 return; /* BOGUS! Must specify subsystem. */ 346 if (type == NULL) 347 return; /* BOGUS! Must specify type. */ 348 len += strlen(" system=") + strlen(system); 349 len += strlen(" subsystem=") + strlen(subsystem); 350 len += strlen(" type=") + strlen(type); 351 /* add in the data message plus newline. */ 352 if (data != NULL) 353 len += strlen(data); 354 len += 3; /* '!', '\n', and NUL */ 355 msg = kmalloc(len, M_BUS, M_NOWAIT); 356 if (msg == NULL) 357 return; /* Drop it on the floor */ 358 if (data != NULL) 359 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n", 360 system, subsystem, type, data); 361 else 362 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n", 363 system, subsystem, type); 364 devctl_queue_data(msg); 365 } 366 367 /* 368 * Common routine that tries to make sending messages as easy as possible. 369 * We allocate memory for the data, copy strings into that, but do not 370 * free it unless there's an error. The dequeue part of the driver should 371 * free the data. We don't send data when the device is disabled. We do 372 * send data, even when we have no listeners, because we wish to avoid 373 * races relating to startup and restart of listening applications. 374 * 375 * devaddq is designed to string together the type of event, with the 376 * object of that event, plus the plug and play info and location info 377 * for that event. This is likely most useful for devices, but less 378 * useful for other consumers of this interface. Those should use 379 * the devctl_queue_data() interface instead. 380 */ 381 static void 382 devaddq(const char *type, const char *what, device_t dev) 383 { 384 char *data = NULL; 385 char *loc = NULL; 386 char *pnp = NULL; 387 const char *parstr; 388 389 if (devctl_disable) 390 return; 391 data = kmalloc(1024, M_BUS, M_NOWAIT); 392 if (data == NULL) 393 goto bad; 394 395 /* get the bus specific location of this device */ 396 loc = kmalloc(1024, M_BUS, M_NOWAIT); 397 if (loc == NULL) 398 goto bad; 399 *loc = '\0'; 400 bus_child_location_str(dev, loc, 1024); 401 402 /* Get the bus specific pnp info of this device */ 403 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 404 if (pnp == NULL) 405 goto bad; 406 *pnp = '\0'; 407 bus_child_pnpinfo_str(dev, pnp, 1024); 408 409 /* Get the parent of this device, or / if high enough in the tree. */ 410 if (device_get_parent(dev) == NULL) 411 parstr = "."; /* Or '/' ? */ 412 else 413 parstr = device_get_nameunit(device_get_parent(dev)); 414 /* String it all together. */ 415 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp, 416 parstr); 417 kfree(loc, M_BUS); 418 kfree(pnp, M_BUS); 419 devctl_queue_data(data); 420 return; 421 bad: 422 kfree(pnp, M_BUS); 423 kfree(loc, M_BUS); 424 kfree(data, M_BUS); 425 return; 426 } 427 428 /* 429 * A device was added to the tree. We are called just after it successfully 430 * attaches (that is, probe and attach success for this device). No call 431 * is made if a device is merely parented into the tree. See devnomatch 432 * if probe fails. If attach fails, no notification is sent (but maybe 433 * we should have a different message for this). 434 */ 435 static void 436 devadded(device_t dev) 437 { 438 char *pnp = NULL; 439 char *tmp = NULL; 440 441 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 442 if (pnp == NULL) 443 goto fail; 444 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 445 if (tmp == NULL) 446 goto fail; 447 *pnp = '\0'; 448 bus_child_pnpinfo_str(dev, pnp, 1024); 449 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 450 devaddq("+", tmp, dev); 451 fail: 452 if (pnp != NULL) 453 kfree(pnp, M_BUS); 454 if (tmp != NULL) 455 kfree(tmp, M_BUS); 456 return; 457 } 458 459 /* 460 * A device was removed from the tree. We are called just before this 461 * happens. 462 */ 463 static void 464 devremoved(device_t dev) 465 { 466 char *pnp = NULL; 467 char *tmp = NULL; 468 469 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 470 if (pnp == NULL) 471 goto fail; 472 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 473 if (tmp == NULL) 474 goto fail; 475 *pnp = '\0'; 476 bus_child_pnpinfo_str(dev, pnp, 1024); 477 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 478 devaddq("-", tmp, dev); 479 fail: 480 if (pnp != NULL) 481 kfree(pnp, M_BUS); 482 if (tmp != NULL) 483 kfree(tmp, M_BUS); 484 return; 485 } 486 487 /* 488 * Called when there's no match for this device. This is only called 489 * the first time that no match happens, so we don't keep getitng this 490 * message. Should that prove to be undesirable, we can change it. 491 * This is called when all drivers that can attach to a given bus 492 * decline to accept this device. Other errrors may not be detected. 493 */ 494 static void 495 devnomatch(device_t dev) 496 { 497 devaddq("?", "", dev); 498 } 499 500 static int 501 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 502 { 503 struct dev_event_info *n1; 504 int dis, error; 505 506 dis = devctl_disable; 507 error = sysctl_handle_int(oidp, &dis, 0, req); 508 if (error || !req->newptr) 509 return (error); 510 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 511 devctl_disable = dis; 512 if (dis) { 513 while (!TAILQ_EMPTY(&devsoftc.devq)) { 514 n1 = TAILQ_FIRST(&devsoftc.devq); 515 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 516 kfree(n1->dei_data, M_BUS); 517 kfree(n1, M_BUS); 518 } 519 } 520 lockmgr(&devsoftc.lock, LK_RELEASE); 521 return (0); 522 } 523 524 /* End of /dev/devctl code */ 525 526 TAILQ_HEAD(,device) bus_data_devices; 527 static int bus_data_generation = 1; 528 529 kobj_method_t null_methods[] = { 530 { 0, 0 } 531 }; 532 533 DEFINE_CLASS(null, null_methods, 0); 534 535 /* 536 * Devclass implementation 537 */ 538 539 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 540 541 static devclass_t 542 devclass_find_internal(const char *classname, const char *parentname, 543 int create) 544 { 545 devclass_t dc; 546 547 PDEBUG(("looking for %s", classname)); 548 if (classname == NULL) 549 return(NULL); 550 551 TAILQ_FOREACH(dc, &devclasses, link) 552 if (!strcmp(dc->name, classname)) 553 break; 554 555 if (create && !dc) { 556 PDEBUG(("creating %s", classname)); 557 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1, 558 M_BUS, M_INTWAIT | M_ZERO); 559 if (!dc) 560 return(NULL); 561 dc->parent = NULL; 562 dc->name = (char*) (dc + 1); 563 strcpy(dc->name, classname); 564 dc->devices = NULL; 565 dc->maxunit = 0; 566 TAILQ_INIT(&dc->drivers); 567 TAILQ_INSERT_TAIL(&devclasses, dc, link); 568 569 bus_data_generation_update(); 570 571 } 572 if (parentname && dc && !dc->parent) 573 dc->parent = devclass_find_internal(parentname, NULL, FALSE); 574 575 return(dc); 576 } 577 578 devclass_t 579 devclass_create(const char *classname) 580 { 581 return(devclass_find_internal(classname, NULL, TRUE)); 582 } 583 584 devclass_t 585 devclass_find(const char *classname) 586 { 587 return(devclass_find_internal(classname, NULL, FALSE)); 588 } 589 590 device_t 591 devclass_find_unit(const char *classname, int unit) 592 { 593 devclass_t dc; 594 595 if ((dc = devclass_find(classname)) != NULL) 596 return(devclass_get_device(dc, unit)); 597 return (NULL); 598 } 599 600 int 601 devclass_add_driver(devclass_t dc, driver_t *driver) 602 { 603 driverlink_t dl; 604 device_t dev; 605 int i; 606 607 PDEBUG(("%s", DRIVERNAME(driver))); 608 609 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 610 if (!dl) 611 return(ENOMEM); 612 613 /* 614 * Compile the driver's methods. Also increase the reference count 615 * so that the class doesn't get freed when the last instance 616 * goes. This means we can safely use static methods and avoids a 617 * double-free in devclass_delete_driver. 618 */ 619 kobj_class_instantiate(driver); 620 621 /* 622 * Make sure the devclass which the driver is implementing exists. 623 */ 624 devclass_find_internal(driver->name, NULL, TRUE); 625 626 dl->driver = driver; 627 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 628 629 /* 630 * Call BUS_DRIVER_ADDED for any existing busses in this class, 631 * but only if the bus has already been attached (otherwise we 632 * might probe too early). 633 * 634 * This is what will cause a newly loaded module to be associated 635 * with hardware. bus_generic_driver_added() is typically what ends 636 * up being called. 637 */ 638 for (i = 0; i < dc->maxunit; i++) { 639 if ((dev = dc->devices[i]) != NULL) { 640 if (dev->state >= DS_ATTACHED) 641 BUS_DRIVER_ADDED(dev, driver); 642 } 643 } 644 645 bus_data_generation_update(); 646 return(0); 647 } 648 649 int 650 devclass_delete_driver(devclass_t busclass, driver_t *driver) 651 { 652 devclass_t dc = devclass_find(driver->name); 653 driverlink_t dl; 654 device_t dev; 655 int i; 656 int error; 657 658 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 659 660 if (!dc) 661 return(0); 662 663 /* 664 * Find the link structure in the bus' list of drivers. 665 */ 666 TAILQ_FOREACH(dl, &busclass->drivers, link) 667 if (dl->driver == driver) 668 break; 669 670 if (!dl) { 671 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 672 return(ENOENT); 673 } 674 675 /* 676 * Disassociate from any devices. We iterate through all the 677 * devices in the devclass of the driver and detach any which are 678 * using the driver and which have a parent in the devclass which 679 * we are deleting from. 680 * 681 * Note that since a driver can be in multiple devclasses, we 682 * should not detach devices which are not children of devices in 683 * the affected devclass. 684 */ 685 for (i = 0; i < dc->maxunit; i++) 686 if (dc->devices[i]) { 687 dev = dc->devices[i]; 688 if (dev->driver == driver && dev->parent && 689 dev->parent->devclass == busclass) { 690 if ((error = device_detach(dev)) != 0) 691 return(error); 692 device_set_driver(dev, NULL); 693 } 694 } 695 696 TAILQ_REMOVE(&busclass->drivers, dl, link); 697 kfree(dl, M_BUS); 698 699 kobj_class_uninstantiate(driver); 700 701 bus_data_generation_update(); 702 return(0); 703 } 704 705 static driverlink_t 706 devclass_find_driver_internal(devclass_t dc, const char *classname) 707 { 708 driverlink_t dl; 709 710 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 711 712 TAILQ_FOREACH(dl, &dc->drivers, link) 713 if (!strcmp(dl->driver->name, classname)) 714 return(dl); 715 716 PDEBUG(("not found")); 717 return(NULL); 718 } 719 720 kobj_class_t 721 devclass_find_driver(devclass_t dc, const char *classname) 722 { 723 driverlink_t dl; 724 725 dl = devclass_find_driver_internal(dc, classname); 726 if (dl) 727 return(dl->driver); 728 else 729 return(NULL); 730 } 731 732 const char * 733 devclass_get_name(devclass_t dc) 734 { 735 return(dc->name); 736 } 737 738 device_t 739 devclass_get_device(devclass_t dc, int unit) 740 { 741 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 742 return(NULL); 743 return(dc->devices[unit]); 744 } 745 746 void * 747 devclass_get_softc(devclass_t dc, int unit) 748 { 749 device_t dev; 750 751 dev = devclass_get_device(dc, unit); 752 if (!dev) 753 return(NULL); 754 755 return(device_get_softc(dev)); 756 } 757 758 int 759 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 760 { 761 int i; 762 int count; 763 device_t *list; 764 765 count = 0; 766 for (i = 0; i < dc->maxunit; i++) 767 if (dc->devices[i]) 768 count++; 769 770 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 771 if (list == NULL) 772 return(ENOMEM); 773 774 count = 0; 775 for (i = 0; i < dc->maxunit; i++) 776 if (dc->devices[i]) { 777 list[count] = dc->devices[i]; 778 count++; 779 } 780 781 *devlistp = list; 782 *devcountp = count; 783 784 return(0); 785 } 786 787 /** 788 * @brief Get a list of drivers in the devclass 789 * 790 * An array containing a list of pointers to all the drivers in the 791 * given devclass is allocated and returned in @p *listp. The number 792 * of drivers in the array is returned in @p *countp. The caller should 793 * free the array using @c free(p, M_TEMP). 794 * 795 * @param dc the devclass to examine 796 * @param listp gives location for array pointer return value 797 * @param countp gives location for number of array elements 798 * return value 799 * 800 * @retval 0 success 801 * @retval ENOMEM the array allocation failed 802 */ 803 int 804 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp) 805 { 806 driverlink_t dl; 807 driver_t **list; 808 int count; 809 810 count = 0; 811 TAILQ_FOREACH(dl, &dc->drivers, link) 812 count++; 813 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT); 814 if (list == NULL) 815 return (ENOMEM); 816 817 count = 0; 818 TAILQ_FOREACH(dl, &dc->drivers, link) { 819 list[count] = dl->driver; 820 count++; 821 } 822 *listp = list; 823 *countp = count; 824 825 return (0); 826 } 827 828 /** 829 * @brief Get the number of devices in a devclass 830 * 831 * @param dc the devclass to examine 832 */ 833 int 834 devclass_get_count(devclass_t dc) 835 { 836 int count, i; 837 838 count = 0; 839 for (i = 0; i < dc->maxunit; i++) 840 if (dc->devices[i]) 841 count++; 842 return (count); 843 } 844 845 int 846 devclass_get_maxunit(devclass_t dc) 847 { 848 return(dc->maxunit); 849 } 850 851 void 852 devclass_set_parent(devclass_t dc, devclass_t pdc) 853 { 854 dc->parent = pdc; 855 } 856 857 devclass_t 858 devclass_get_parent(devclass_t dc) 859 { 860 return(dc->parent); 861 } 862 863 static int 864 devclass_alloc_unit(devclass_t dc, int *unitp) 865 { 866 int unit = *unitp; 867 868 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 869 870 /* If we have been given a wired unit number, check for existing device */ 871 if (unit != -1) { 872 if (unit >= 0 && unit < dc->maxunit && 873 dc->devices[unit] != NULL) { 874 if (bootverbose) 875 kprintf("%s-: %s%d exists, using next available unit number\n", 876 dc->name, dc->name, unit); 877 /* find the next available slot */ 878 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 879 ; 880 } 881 } else { 882 /* Unwired device, find the next available slot for it */ 883 unit = 0; 884 while (unit < dc->maxunit && dc->devices[unit] != NULL) 885 unit++; 886 } 887 888 /* 889 * We've selected a unit beyond the length of the table, so let's 890 * extend the table to make room for all units up to and including 891 * this one. 892 */ 893 if (unit >= dc->maxunit) { 894 device_t *newlist; 895 int newsize; 896 897 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 898 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS, 899 M_INTWAIT | M_ZERO); 900 if (newlist == NULL) 901 return(ENOMEM); 902 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 903 if (dc->devices) 904 kfree(dc->devices, M_BUS); 905 dc->devices = newlist; 906 dc->maxunit = newsize; 907 } 908 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 909 910 *unitp = unit; 911 return(0); 912 } 913 914 static int 915 devclass_add_device(devclass_t dc, device_t dev) 916 { 917 int buflen, error; 918 919 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 920 921 buflen = strlen(dc->name) + 5; 922 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 923 if (!dev->nameunit) 924 return(ENOMEM); 925 926 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 927 kfree(dev->nameunit, M_BUS); 928 dev->nameunit = NULL; 929 return(error); 930 } 931 dc->devices[dev->unit] = dev; 932 dev->devclass = dc; 933 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 934 935 return(0); 936 } 937 938 static int 939 devclass_delete_device(devclass_t dc, device_t dev) 940 { 941 if (!dc || !dev) 942 return(0); 943 944 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 945 946 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 947 panic("devclass_delete_device: inconsistent device class"); 948 dc->devices[dev->unit] = NULL; 949 if (dev->flags & DF_WILDCARD) 950 dev->unit = -1; 951 dev->devclass = NULL; 952 kfree(dev->nameunit, M_BUS); 953 dev->nameunit = NULL; 954 955 return(0); 956 } 957 958 static device_t 959 make_device(device_t parent, const char *name, int unit) 960 { 961 device_t dev; 962 devclass_t dc; 963 964 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 965 966 if (name != NULL) { 967 dc = devclass_find_internal(name, NULL, TRUE); 968 if (!dc) { 969 kprintf("make_device: can't find device class %s\n", name); 970 return(NULL); 971 } 972 } else 973 dc = NULL; 974 975 dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); 976 if (!dev) 977 return(0); 978 979 dev->parent = parent; 980 TAILQ_INIT(&dev->children); 981 kobj_init((kobj_t) dev, &null_class); 982 dev->driver = NULL; 983 dev->devclass = NULL; 984 dev->unit = unit; 985 dev->nameunit = NULL; 986 dev->desc = NULL; 987 dev->busy = 0; 988 dev->devflags = 0; 989 dev->flags = DF_ENABLED; 990 dev->order = 0; 991 if (unit == -1) 992 dev->flags |= DF_WILDCARD; 993 if (name) { 994 dev->flags |= DF_FIXEDCLASS; 995 if (devclass_add_device(dc, dev) != 0) { 996 kobj_delete((kobj_t)dev, M_BUS); 997 return(NULL); 998 } 999 } 1000 dev->ivars = NULL; 1001 dev->softc = NULL; 1002 1003 dev->state = DS_NOTPRESENT; 1004 1005 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 1006 bus_data_generation_update(); 1007 1008 return(dev); 1009 } 1010 1011 static int 1012 device_print_child(device_t dev, device_t child) 1013 { 1014 int retval = 0; 1015 1016 if (device_is_alive(child)) 1017 retval += BUS_PRINT_CHILD(dev, child); 1018 else 1019 retval += device_printf(child, " not found\n"); 1020 1021 return(retval); 1022 } 1023 1024 device_t 1025 device_add_child(device_t dev, const char *name, int unit) 1026 { 1027 return device_add_child_ordered(dev, 0, name, unit); 1028 } 1029 1030 device_t 1031 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 1032 { 1033 device_t child; 1034 device_t place; 1035 1036 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 1037 order, unit)); 1038 1039 child = make_device(dev, name, unit); 1040 if (child == NULL) 1041 return child; 1042 child->order = order; 1043 1044 TAILQ_FOREACH(place, &dev->children, link) 1045 if (place->order > order) 1046 break; 1047 1048 if (place) { 1049 /* 1050 * The device 'place' is the first device whose order is 1051 * greater than the new child. 1052 */ 1053 TAILQ_INSERT_BEFORE(place, child, link); 1054 } else { 1055 /* 1056 * The new child's order is greater or equal to the order of 1057 * any existing device. Add the child to the tail of the list. 1058 */ 1059 TAILQ_INSERT_TAIL(&dev->children, child, link); 1060 } 1061 1062 bus_data_generation_update(); 1063 return(child); 1064 } 1065 1066 int 1067 device_delete_child(device_t dev, device_t child) 1068 { 1069 int error; 1070 device_t grandchild; 1071 1072 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 1073 1074 /* remove children first */ 1075 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 1076 error = device_delete_child(child, grandchild); 1077 if (error) 1078 return(error); 1079 } 1080 1081 if ((error = device_detach(child)) != 0) 1082 return(error); 1083 if (child->devclass) 1084 devclass_delete_device(child->devclass, child); 1085 TAILQ_REMOVE(&dev->children, child, link); 1086 TAILQ_REMOVE(&bus_data_devices, child, devlink); 1087 device_set_desc(child, NULL); 1088 kobj_delete((kobj_t)child, M_BUS); 1089 1090 bus_data_generation_update(); 1091 return(0); 1092 } 1093 1094 /** 1095 * @brief Find a device given a unit number 1096 * 1097 * This is similar to devclass_get_devices() but only searches for 1098 * devices which have @p dev as a parent. 1099 * 1100 * @param dev the parent device to search 1101 * @param unit the unit number to search for. If the unit is -1, 1102 * return the first child of @p dev which has name 1103 * @p classname (that is, the one with the lowest unit.) 1104 * 1105 * @returns the device with the given unit number or @c 1106 * NULL if there is no such device 1107 */ 1108 device_t 1109 device_find_child(device_t dev, const char *classname, int unit) 1110 { 1111 devclass_t dc; 1112 device_t child; 1113 1114 dc = devclass_find(classname); 1115 if (!dc) 1116 return(NULL); 1117 1118 if (unit != -1) { 1119 child = devclass_get_device(dc, unit); 1120 if (child && child->parent == dev) 1121 return (child); 1122 } else { 1123 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) { 1124 child = devclass_get_device(dc, unit); 1125 if (child && child->parent == dev) 1126 return (child); 1127 } 1128 } 1129 return(NULL); 1130 } 1131 1132 static driverlink_t 1133 first_matching_driver(devclass_t dc, device_t dev) 1134 { 1135 if (dev->devclass) 1136 return(devclass_find_driver_internal(dc, dev->devclass->name)); 1137 else 1138 return(TAILQ_FIRST(&dc->drivers)); 1139 } 1140 1141 static driverlink_t 1142 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1143 { 1144 if (dev->devclass) { 1145 driverlink_t dl; 1146 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1147 if (!strcmp(dev->devclass->name, dl->driver->name)) 1148 return(dl); 1149 return(NULL); 1150 } else 1151 return(TAILQ_NEXT(last, link)); 1152 } 1153 1154 static int 1155 device_probe_child(device_t dev, device_t child) 1156 { 1157 devclass_t dc; 1158 driverlink_t best = 0; 1159 driverlink_t dl; 1160 int result, pri = 0; 1161 int hasclass = (child->devclass != 0); 1162 1163 dc = dev->devclass; 1164 if (!dc) 1165 panic("device_probe_child: parent device has no devclass"); 1166 1167 if (child->state == DS_ALIVE) 1168 return(0); 1169 1170 for (; dc; dc = dc->parent) { 1171 for (dl = first_matching_driver(dc, child); dl; 1172 dl = next_matching_driver(dc, child, dl)) { 1173 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1174 device_set_driver(child, dl->driver); 1175 if (!hasclass) 1176 device_set_devclass(child, dl->driver->name); 1177 result = DEVICE_PROBE(child); 1178 if (!hasclass) 1179 device_set_devclass(child, 0); 1180 1181 /* 1182 * If the driver returns SUCCESS, there can be 1183 * no higher match for this device. 1184 */ 1185 if (result == 0) { 1186 best = dl; 1187 pri = 0; 1188 break; 1189 } 1190 1191 /* 1192 * The driver returned an error so it 1193 * certainly doesn't match. 1194 */ 1195 if (result > 0) { 1196 device_set_driver(child, 0); 1197 continue; 1198 } 1199 1200 /* 1201 * A priority lower than SUCCESS, remember the 1202 * best matching driver. Initialise the value 1203 * of pri for the first match. 1204 */ 1205 if (best == 0 || result > pri) { 1206 best = dl; 1207 pri = result; 1208 continue; 1209 } 1210 } 1211 /* 1212 * If we have unambiguous match in this devclass, 1213 * don't look in the parent. 1214 */ 1215 if (best && pri == 0) 1216 break; 1217 } 1218 1219 /* 1220 * If we found a driver, change state and initialise the devclass. 1221 */ 1222 if (best) { 1223 if (!child->devclass) 1224 device_set_devclass(child, best->driver->name); 1225 device_set_driver(child, best->driver); 1226 if (pri < 0) { 1227 /* 1228 * A bit bogus. Call the probe method again to make 1229 * sure that we have the right description. 1230 */ 1231 DEVICE_PROBE(child); 1232 } 1233 1234 bus_data_generation_update(); 1235 child->state = DS_ALIVE; 1236 return(0); 1237 } 1238 1239 return(ENXIO); 1240 } 1241 1242 device_t 1243 device_get_parent(device_t dev) 1244 { 1245 return dev->parent; 1246 } 1247 1248 int 1249 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1250 { 1251 int count; 1252 device_t child; 1253 device_t *list; 1254 1255 count = 0; 1256 TAILQ_FOREACH(child, &dev->children, link) 1257 count++; 1258 1259 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 1260 if (!list) 1261 return(ENOMEM); 1262 1263 count = 0; 1264 TAILQ_FOREACH(child, &dev->children, link) { 1265 list[count] = child; 1266 count++; 1267 } 1268 1269 *devlistp = list; 1270 *devcountp = count; 1271 1272 return(0); 1273 } 1274 1275 driver_t * 1276 device_get_driver(device_t dev) 1277 { 1278 return(dev->driver); 1279 } 1280 1281 devclass_t 1282 device_get_devclass(device_t dev) 1283 { 1284 return(dev->devclass); 1285 } 1286 1287 const char * 1288 device_get_name(device_t dev) 1289 { 1290 if (dev->devclass) 1291 return devclass_get_name(dev->devclass); 1292 return(NULL); 1293 } 1294 1295 const char * 1296 device_get_nameunit(device_t dev) 1297 { 1298 return(dev->nameunit); 1299 } 1300 1301 int 1302 device_get_unit(device_t dev) 1303 { 1304 return(dev->unit); 1305 } 1306 1307 const char * 1308 device_get_desc(device_t dev) 1309 { 1310 return(dev->desc); 1311 } 1312 1313 uint32_t 1314 device_get_flags(device_t dev) 1315 { 1316 return(dev->devflags); 1317 } 1318 1319 int 1320 device_print_prettyname(device_t dev) 1321 { 1322 const char *name = device_get_name(dev); 1323 1324 if (name == 0) 1325 return kprintf("unknown: "); 1326 else 1327 return kprintf("%s%d: ", name, device_get_unit(dev)); 1328 } 1329 1330 int 1331 device_printf(device_t dev, const char * fmt, ...) 1332 { 1333 __va_list ap; 1334 int retval; 1335 1336 retval = device_print_prettyname(dev); 1337 __va_start(ap, fmt); 1338 retval += kvprintf(fmt, ap); 1339 __va_end(ap); 1340 return retval; 1341 } 1342 1343 static void 1344 device_set_desc_internal(device_t dev, const char* desc, int copy) 1345 { 1346 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1347 kfree(dev->desc, M_BUS); 1348 dev->flags &= ~DF_DESCMALLOCED; 1349 dev->desc = NULL; 1350 } 1351 1352 if (copy && desc) { 1353 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 1354 if (dev->desc) { 1355 strcpy(dev->desc, desc); 1356 dev->flags |= DF_DESCMALLOCED; 1357 } 1358 } else { 1359 /* Avoid a -Wcast-qual warning */ 1360 dev->desc = (char *)(uintptr_t) desc; 1361 } 1362 1363 bus_data_generation_update(); 1364 } 1365 1366 void 1367 device_set_desc(device_t dev, const char* desc) 1368 { 1369 device_set_desc_internal(dev, desc, FALSE); 1370 } 1371 1372 void 1373 device_set_desc_copy(device_t dev, const char* desc) 1374 { 1375 device_set_desc_internal(dev, desc, TRUE); 1376 } 1377 1378 void 1379 device_set_flags(device_t dev, uint32_t flags) 1380 { 1381 dev->devflags = flags; 1382 } 1383 1384 void * 1385 device_get_softc(device_t dev) 1386 { 1387 return dev->softc; 1388 } 1389 1390 void 1391 device_set_softc(device_t dev, void *softc) 1392 { 1393 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1394 kfree(dev->softc, M_BUS); 1395 dev->softc = softc; 1396 if (dev->softc) 1397 dev->flags |= DF_EXTERNALSOFTC; 1398 else 1399 dev->flags &= ~DF_EXTERNALSOFTC; 1400 } 1401 1402 void 1403 device_set_async_attach(device_t dev, int enable) 1404 { 1405 if (enable) 1406 dev->flags |= DF_ASYNCPROBE; 1407 else 1408 dev->flags &= ~DF_ASYNCPROBE; 1409 } 1410 1411 void * 1412 device_get_ivars(device_t dev) 1413 { 1414 return dev->ivars; 1415 } 1416 1417 void 1418 device_set_ivars(device_t dev, void * ivars) 1419 { 1420 if (!dev) 1421 return; 1422 1423 dev->ivars = ivars; 1424 } 1425 1426 device_state_t 1427 device_get_state(device_t dev) 1428 { 1429 return(dev->state); 1430 } 1431 1432 void 1433 device_enable(device_t dev) 1434 { 1435 dev->flags |= DF_ENABLED; 1436 } 1437 1438 void 1439 device_disable(device_t dev) 1440 { 1441 dev->flags &= ~DF_ENABLED; 1442 } 1443 1444 /* 1445 * YYY cannot block 1446 */ 1447 void 1448 device_busy(device_t dev) 1449 { 1450 if (dev->state < DS_ATTACHED) 1451 panic("device_busy: called for unattached device"); 1452 if (dev->busy == 0 && dev->parent) 1453 device_busy(dev->parent); 1454 dev->busy++; 1455 dev->state = DS_BUSY; 1456 } 1457 1458 /* 1459 * YYY cannot block 1460 */ 1461 void 1462 device_unbusy(device_t dev) 1463 { 1464 if (dev->state != DS_BUSY) 1465 panic("device_unbusy: called for non-busy device"); 1466 dev->busy--; 1467 if (dev->busy == 0) { 1468 if (dev->parent) 1469 device_unbusy(dev->parent); 1470 dev->state = DS_ATTACHED; 1471 } 1472 } 1473 1474 void 1475 device_quiet(device_t dev) 1476 { 1477 dev->flags |= DF_QUIET; 1478 } 1479 1480 void 1481 device_verbose(device_t dev) 1482 { 1483 dev->flags &= ~DF_QUIET; 1484 } 1485 1486 int 1487 device_is_quiet(device_t dev) 1488 { 1489 return((dev->flags & DF_QUIET) != 0); 1490 } 1491 1492 int 1493 device_is_enabled(device_t dev) 1494 { 1495 return((dev->flags & DF_ENABLED) != 0); 1496 } 1497 1498 int 1499 device_is_alive(device_t dev) 1500 { 1501 return(dev->state >= DS_ALIVE); 1502 } 1503 1504 int 1505 device_is_attached(device_t dev) 1506 { 1507 return(dev->state >= DS_ATTACHED); 1508 } 1509 1510 int 1511 device_set_devclass(device_t dev, const char *classname) 1512 { 1513 devclass_t dc; 1514 int error; 1515 1516 if (!classname) { 1517 if (dev->devclass) 1518 devclass_delete_device(dev->devclass, dev); 1519 return(0); 1520 } 1521 1522 if (dev->devclass) { 1523 kprintf("device_set_devclass: device class already set\n"); 1524 return(EINVAL); 1525 } 1526 1527 dc = devclass_find_internal(classname, NULL, TRUE); 1528 if (!dc) 1529 return(ENOMEM); 1530 1531 error = devclass_add_device(dc, dev); 1532 1533 bus_data_generation_update(); 1534 return(error); 1535 } 1536 1537 int 1538 device_set_driver(device_t dev, driver_t *driver) 1539 { 1540 if (dev->state >= DS_ATTACHED) 1541 return(EBUSY); 1542 1543 if (dev->driver == driver) 1544 return(0); 1545 1546 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1547 kfree(dev->softc, M_BUS); 1548 dev->softc = NULL; 1549 } 1550 kobj_delete((kobj_t) dev, 0); 1551 dev->driver = driver; 1552 if (driver) { 1553 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1554 if (!(dev->flags & DF_EXTERNALSOFTC)) { 1555 dev->softc = kmalloc(driver->size, M_BUS, 1556 M_INTWAIT | M_ZERO); 1557 if (!dev->softc) { 1558 kobj_delete((kobj_t)dev, 0); 1559 kobj_init((kobj_t) dev, &null_class); 1560 dev->driver = NULL; 1561 return(ENOMEM); 1562 } 1563 } 1564 } else { 1565 kobj_init((kobj_t) dev, &null_class); 1566 } 1567 1568 bus_data_generation_update(); 1569 return(0); 1570 } 1571 1572 int 1573 device_probe_and_attach(device_t dev) 1574 { 1575 device_t bus = dev->parent; 1576 int error = 0; 1577 1578 if (dev->state >= DS_ALIVE) 1579 return(0); 1580 1581 if ((dev->flags & DF_ENABLED) == 0) { 1582 if (bootverbose) { 1583 device_print_prettyname(dev); 1584 kprintf("not probed (disabled)\n"); 1585 } 1586 return(0); 1587 } 1588 1589 error = device_probe_child(bus, dev); 1590 if (error) { 1591 if (!(dev->flags & DF_DONENOMATCH)) { 1592 BUS_PROBE_NOMATCH(bus, dev); 1593 devnomatch(dev); 1594 dev->flags |= DF_DONENOMATCH; 1595 } 1596 return(error); 1597 } 1598 1599 /* 1600 * Output the exact device chain prior to the attach in case the 1601 * system locks up during attach, and generate the full info after 1602 * the attach so correct irq and other information is displayed. 1603 */ 1604 if (bootverbose && !device_is_quiet(dev)) { 1605 device_t tmp; 1606 1607 kprintf("%s", device_get_nameunit(dev)); 1608 for (tmp = dev->parent; tmp; tmp = tmp->parent) 1609 kprintf(".%s", device_get_nameunit(tmp)); 1610 kprintf("\n"); 1611 } 1612 if (!device_is_quiet(dev)) 1613 device_print_child(bus, dev); 1614 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) { 1615 kprintf("%s: probing asynchronously\n", 1616 device_get_nameunit(dev)); 1617 dev->state = DS_INPROGRESS; 1618 device_attach_async(dev); 1619 error = 0; 1620 } else { 1621 error = device_doattach(dev); 1622 } 1623 return(error); 1624 } 1625 1626 /* 1627 * Device is known to be alive, do the attach asynchronously. 1628 * 1629 * The MP lock is held by all threads. 1630 */ 1631 static void 1632 device_attach_async(device_t dev) 1633 { 1634 thread_t td; 1635 1636 atomic_add_int(&numasyncthreads, 1); 1637 lwkt_create(device_attach_thread, dev, &td, NULL, 1638 0, 0, (dev->desc ? dev->desc : "devattach")); 1639 } 1640 1641 static void 1642 device_attach_thread(void *arg) 1643 { 1644 device_t dev = arg; 1645 1646 (void)device_doattach(dev); 1647 atomic_subtract_int(&numasyncthreads, 1); 1648 wakeup(&numasyncthreads); 1649 } 1650 1651 /* 1652 * Device is known to be alive, do the attach (synchronous or asynchronous) 1653 */ 1654 static int 1655 device_doattach(device_t dev) 1656 { 1657 device_t bus = dev->parent; 1658 int hasclass = (dev->devclass != 0); 1659 int error; 1660 1661 error = DEVICE_ATTACH(dev); 1662 if (error == 0) { 1663 dev->state = DS_ATTACHED; 1664 if (bootverbose && !device_is_quiet(dev)) 1665 device_print_child(bus, dev); 1666 devadded(dev); 1667 } else { 1668 kprintf("device_probe_and_attach: %s%d attach returned %d\n", 1669 dev->driver->name, dev->unit, error); 1670 /* Unset the class that was set in device_probe_child */ 1671 if (!hasclass) 1672 device_set_devclass(dev, 0); 1673 device_set_driver(dev, NULL); 1674 dev->state = DS_NOTPRESENT; 1675 } 1676 return(error); 1677 } 1678 1679 int 1680 device_detach(device_t dev) 1681 { 1682 int error; 1683 1684 PDEBUG(("%s", DEVICENAME(dev))); 1685 if (dev->state == DS_BUSY) 1686 return(EBUSY); 1687 if (dev->state != DS_ATTACHED) 1688 return(0); 1689 1690 if ((error = DEVICE_DETACH(dev)) != 0) 1691 return(error); 1692 devremoved(dev); 1693 device_printf(dev, "detached\n"); 1694 if (dev->parent) 1695 BUS_CHILD_DETACHED(dev->parent, dev); 1696 1697 if (!(dev->flags & DF_FIXEDCLASS)) 1698 devclass_delete_device(dev->devclass, dev); 1699 1700 dev->state = DS_NOTPRESENT; 1701 device_set_driver(dev, NULL); 1702 1703 return(0); 1704 } 1705 1706 int 1707 device_shutdown(device_t dev) 1708 { 1709 if (dev->state < DS_ATTACHED) 1710 return 0; 1711 PDEBUG(("%s", DEVICENAME(dev))); 1712 return DEVICE_SHUTDOWN(dev); 1713 } 1714 1715 int 1716 device_set_unit(device_t dev, int unit) 1717 { 1718 devclass_t dc; 1719 int err; 1720 1721 dc = device_get_devclass(dev); 1722 if (unit < dc->maxunit && dc->devices[unit]) 1723 return(EBUSY); 1724 err = devclass_delete_device(dc, dev); 1725 if (err) 1726 return(err); 1727 dev->unit = unit; 1728 err = devclass_add_device(dc, dev); 1729 if (err) 1730 return(err); 1731 1732 bus_data_generation_update(); 1733 return(0); 1734 } 1735 1736 /*======================================*/ 1737 /* 1738 * Access functions for device resources. 1739 */ 1740 1741 /* Supplied by config(8) in ioconf.c */ 1742 extern struct config_device config_devtab[]; 1743 extern int devtab_count; 1744 1745 /* Runtime version */ 1746 struct config_device *devtab = config_devtab; 1747 1748 static int 1749 resource_new_name(const char *name, int unit) 1750 { 1751 struct config_device *new; 1752 1753 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP, 1754 M_INTWAIT | M_ZERO); 1755 if (new == NULL) 1756 return(-1); 1757 if (devtab && devtab_count > 0) 1758 bcopy(devtab, new, devtab_count * sizeof(*new)); 1759 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 1760 if (new[devtab_count].name == NULL) { 1761 kfree(new, M_TEMP); 1762 return(-1); 1763 } 1764 strcpy(new[devtab_count].name, name); 1765 new[devtab_count].unit = unit; 1766 new[devtab_count].resource_count = 0; 1767 new[devtab_count].resources = NULL; 1768 if (devtab && devtab != config_devtab) 1769 kfree(devtab, M_TEMP); 1770 devtab = new; 1771 return devtab_count++; 1772 } 1773 1774 static int 1775 resource_new_resname(int j, const char *resname, resource_type type) 1776 { 1777 struct config_resource *new; 1778 int i; 1779 1780 i = devtab[j].resource_count; 1781 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 1782 if (new == NULL) 1783 return(-1); 1784 if (devtab[j].resources && i > 0) 1785 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1786 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 1787 if (new[i].name == NULL) { 1788 kfree(new, M_TEMP); 1789 return(-1); 1790 } 1791 strcpy(new[i].name, resname); 1792 new[i].type = type; 1793 if (devtab[j].resources) 1794 kfree(devtab[j].resources, M_TEMP); 1795 devtab[j].resources = new; 1796 devtab[j].resource_count = i + 1; 1797 return(i); 1798 } 1799 1800 static int 1801 resource_match_string(int i, const char *resname, const char *value) 1802 { 1803 int j; 1804 struct config_resource *res; 1805 1806 for (j = 0, res = devtab[i].resources; 1807 j < devtab[i].resource_count; j++, res++) 1808 if (!strcmp(res->name, resname) 1809 && res->type == RES_STRING 1810 && !strcmp(res->u.stringval, value)) 1811 return(j); 1812 return(-1); 1813 } 1814 1815 static int 1816 resource_find(const char *name, int unit, const char *resname, 1817 struct config_resource **result) 1818 { 1819 int i, j; 1820 struct config_resource *res; 1821 1822 /* 1823 * First check specific instances, then generic. 1824 */ 1825 for (i = 0; i < devtab_count; i++) { 1826 if (devtab[i].unit < 0) 1827 continue; 1828 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1829 res = devtab[i].resources; 1830 for (j = 0; j < devtab[i].resource_count; j++, res++) 1831 if (!strcmp(res->name, resname)) { 1832 *result = res; 1833 return(0); 1834 } 1835 } 1836 } 1837 for (i = 0; i < devtab_count; i++) { 1838 if (devtab[i].unit >= 0) 1839 continue; 1840 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1841 /* XXX if so, then the generic match does nothing */ 1842 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1843 res = devtab[i].resources; 1844 for (j = 0; j < devtab[i].resource_count; j++, res++) 1845 if (!strcmp(res->name, resname)) { 1846 *result = res; 1847 return(0); 1848 } 1849 } 1850 } 1851 return(ENOENT); 1852 } 1853 1854 int 1855 resource_int_value(const char *name, int unit, const char *resname, int *result) 1856 { 1857 int error; 1858 struct config_resource *res; 1859 1860 if ((error = resource_find(name, unit, resname, &res)) != 0) 1861 return(error); 1862 if (res->type != RES_INT) 1863 return(EFTYPE); 1864 *result = res->u.intval; 1865 return(0); 1866 } 1867 1868 int 1869 resource_long_value(const char *name, int unit, const char *resname, 1870 long *result) 1871 { 1872 int error; 1873 struct config_resource *res; 1874 1875 if ((error = resource_find(name, unit, resname, &res)) != 0) 1876 return(error); 1877 if (res->type != RES_LONG) 1878 return(EFTYPE); 1879 *result = res->u.longval; 1880 return(0); 1881 } 1882 1883 int 1884 resource_string_value(const char *name, int unit, const char *resname, 1885 char **result) 1886 { 1887 int error; 1888 struct config_resource *res; 1889 1890 if ((error = resource_find(name, unit, resname, &res)) != 0) 1891 return(error); 1892 if (res->type != RES_STRING) 1893 return(EFTYPE); 1894 *result = res->u.stringval; 1895 return(0); 1896 } 1897 1898 int 1899 resource_query_string(int i, const char *resname, const char *value) 1900 { 1901 if (i < 0) 1902 i = 0; 1903 else 1904 i = i + 1; 1905 for (; i < devtab_count; i++) 1906 if (resource_match_string(i, resname, value) >= 0) 1907 return(i); 1908 return(-1); 1909 } 1910 1911 int 1912 resource_locate(int i, const char *resname) 1913 { 1914 if (i < 0) 1915 i = 0; 1916 else 1917 i = i + 1; 1918 for (; i < devtab_count; i++) 1919 if (!strcmp(devtab[i].name, resname)) 1920 return(i); 1921 return(-1); 1922 } 1923 1924 int 1925 resource_count(void) 1926 { 1927 return(devtab_count); 1928 } 1929 1930 char * 1931 resource_query_name(int i) 1932 { 1933 return(devtab[i].name); 1934 } 1935 1936 int 1937 resource_query_unit(int i) 1938 { 1939 return(devtab[i].unit); 1940 } 1941 1942 static int 1943 resource_create(const char *name, int unit, const char *resname, 1944 resource_type type, struct config_resource **result) 1945 { 1946 int i, j; 1947 struct config_resource *res = NULL; 1948 1949 for (i = 0; i < devtab_count; i++) 1950 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1951 res = devtab[i].resources; 1952 break; 1953 } 1954 if (res == NULL) { 1955 i = resource_new_name(name, unit); 1956 if (i < 0) 1957 return(ENOMEM); 1958 res = devtab[i].resources; 1959 } 1960 for (j = 0; j < devtab[i].resource_count; j++, res++) 1961 if (!strcmp(res->name, resname)) { 1962 *result = res; 1963 return(0); 1964 } 1965 j = resource_new_resname(i, resname, type); 1966 if (j < 0) 1967 return(ENOMEM); 1968 res = &devtab[i].resources[j]; 1969 *result = res; 1970 return(0); 1971 } 1972 1973 int 1974 resource_set_int(const char *name, int unit, const char *resname, int value) 1975 { 1976 int error; 1977 struct config_resource *res; 1978 1979 error = resource_create(name, unit, resname, RES_INT, &res); 1980 if (error) 1981 return(error); 1982 if (res->type != RES_INT) 1983 return(EFTYPE); 1984 res->u.intval = value; 1985 return(0); 1986 } 1987 1988 int 1989 resource_set_long(const char *name, int unit, const char *resname, long value) 1990 { 1991 int error; 1992 struct config_resource *res; 1993 1994 error = resource_create(name, unit, resname, RES_LONG, &res); 1995 if (error) 1996 return(error); 1997 if (res->type != RES_LONG) 1998 return(EFTYPE); 1999 res->u.longval = value; 2000 return(0); 2001 } 2002 2003 int 2004 resource_set_string(const char *name, int unit, const char *resname, 2005 const char *value) 2006 { 2007 int error; 2008 struct config_resource *res; 2009 2010 error = resource_create(name, unit, resname, RES_STRING, &res); 2011 if (error) 2012 return(error); 2013 if (res->type != RES_STRING) 2014 return(EFTYPE); 2015 if (res->u.stringval) 2016 kfree(res->u.stringval, M_TEMP); 2017 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 2018 if (res->u.stringval == NULL) 2019 return(ENOMEM); 2020 strcpy(res->u.stringval, value); 2021 return(0); 2022 } 2023 2024 static void 2025 resource_cfgload(void *dummy __unused) 2026 { 2027 struct config_resource *res, *cfgres; 2028 int i, j; 2029 int error; 2030 char *name, *resname; 2031 int unit; 2032 resource_type type; 2033 char *stringval; 2034 int config_devtab_count; 2035 2036 config_devtab_count = devtab_count; 2037 devtab = NULL; 2038 devtab_count = 0; 2039 2040 for (i = 0; i < config_devtab_count; i++) { 2041 name = config_devtab[i].name; 2042 unit = config_devtab[i].unit; 2043 2044 for (j = 0; j < config_devtab[i].resource_count; j++) { 2045 cfgres = config_devtab[i].resources; 2046 resname = cfgres[j].name; 2047 type = cfgres[j].type; 2048 error = resource_create(name, unit, resname, type, 2049 &res); 2050 if (error) { 2051 kprintf("create resource %s%d: error %d\n", 2052 name, unit, error); 2053 continue; 2054 } 2055 if (res->type != type) { 2056 kprintf("type mismatch %s%d: %d != %d\n", 2057 name, unit, res->type, type); 2058 continue; 2059 } 2060 switch (type) { 2061 case RES_INT: 2062 res->u.intval = cfgres[j].u.intval; 2063 break; 2064 case RES_LONG: 2065 res->u.longval = cfgres[j].u.longval; 2066 break; 2067 case RES_STRING: 2068 if (res->u.stringval) 2069 kfree(res->u.stringval, M_TEMP); 2070 stringval = cfgres[j].u.stringval; 2071 res->u.stringval = kmalloc(strlen(stringval) + 1, 2072 M_TEMP, M_INTWAIT); 2073 if (res->u.stringval == NULL) 2074 break; 2075 strcpy(res->u.stringval, stringval); 2076 break; 2077 default: 2078 panic("unknown resource type %d", type); 2079 } 2080 } 2081 } 2082 } 2083 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0) 2084 2085 2086 /*======================================*/ 2087 /* 2088 * Some useful method implementations to make life easier for bus drivers. 2089 */ 2090 2091 void 2092 resource_list_init(struct resource_list *rl) 2093 { 2094 SLIST_INIT(rl); 2095 } 2096 2097 void 2098 resource_list_free(struct resource_list *rl) 2099 { 2100 struct resource_list_entry *rle; 2101 2102 while ((rle = SLIST_FIRST(rl)) != NULL) { 2103 if (rle->res) 2104 panic("resource_list_free: resource entry is busy"); 2105 SLIST_REMOVE_HEAD(rl, link); 2106 kfree(rle, M_BUS); 2107 } 2108 } 2109 2110 void 2111 resource_list_add(struct resource_list *rl, 2112 int type, int rid, 2113 u_long start, u_long end, u_long count) 2114 { 2115 struct resource_list_entry *rle; 2116 2117 rle = resource_list_find(rl, type, rid); 2118 if (rle == NULL) { 2119 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS, 2120 M_INTWAIT); 2121 if (!rle) 2122 panic("resource_list_add: can't record entry"); 2123 SLIST_INSERT_HEAD(rl, rle, link); 2124 rle->type = type; 2125 rle->rid = rid; 2126 rle->res = NULL; 2127 } 2128 2129 if (rle->res) 2130 panic("resource_list_add: resource entry is busy"); 2131 2132 rle->start = start; 2133 rle->end = end; 2134 rle->count = count; 2135 } 2136 2137 struct resource_list_entry* 2138 resource_list_find(struct resource_list *rl, 2139 int type, int rid) 2140 { 2141 struct resource_list_entry *rle; 2142 2143 SLIST_FOREACH(rle, rl, link) 2144 if (rle->type == type && rle->rid == rid) 2145 return(rle); 2146 return(NULL); 2147 } 2148 2149 void 2150 resource_list_delete(struct resource_list *rl, 2151 int type, int rid) 2152 { 2153 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 2154 2155 if (rle) { 2156 if (rle->res != NULL) 2157 panic("resource_list_delete: resource has not been released"); 2158 SLIST_REMOVE(rl, rle, resource_list_entry, link); 2159 kfree(rle, M_BUS); 2160 } 2161 } 2162 2163 struct resource * 2164 resource_list_alloc(struct resource_list *rl, 2165 device_t bus, device_t child, 2166 int type, int *rid, 2167 u_long start, u_long end, 2168 u_long count, u_int flags) 2169 { 2170 struct resource_list_entry *rle = 0; 2171 int passthrough = (device_get_parent(child) != bus); 2172 int isdefault = (start == 0UL && end == ~0UL); 2173 2174 if (passthrough) { 2175 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2176 type, rid, 2177 start, end, count, flags)); 2178 } 2179 2180 rle = resource_list_find(rl, type, *rid); 2181 2182 if (!rle) 2183 return(0); /* no resource of that type/rid */ 2184 2185 if (rle->res) 2186 panic("resource_list_alloc: resource entry is busy"); 2187 2188 if (isdefault) { 2189 start = rle->start; 2190 count = max(count, rle->count); 2191 end = max(rle->end, start + count - 1); 2192 } 2193 2194 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2195 type, rid, start, end, count, flags); 2196 2197 /* 2198 * Record the new range. 2199 */ 2200 if (rle->res) { 2201 rle->start = rman_get_start(rle->res); 2202 rle->end = rman_get_end(rle->res); 2203 rle->count = count; 2204 } 2205 2206 return(rle->res); 2207 } 2208 2209 int 2210 resource_list_release(struct resource_list *rl, 2211 device_t bus, device_t child, 2212 int type, int rid, struct resource *res) 2213 { 2214 struct resource_list_entry *rle = 0; 2215 int passthrough = (device_get_parent(child) != bus); 2216 int error; 2217 2218 if (passthrough) { 2219 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2220 type, rid, res)); 2221 } 2222 2223 rle = resource_list_find(rl, type, rid); 2224 2225 if (!rle) 2226 panic("resource_list_release: can't find resource"); 2227 if (!rle->res) 2228 panic("resource_list_release: resource entry is not busy"); 2229 2230 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2231 type, rid, res); 2232 if (error) 2233 return(error); 2234 2235 rle->res = NULL; 2236 return(0); 2237 } 2238 2239 int 2240 resource_list_print_type(struct resource_list *rl, const char *name, int type, 2241 const char *format) 2242 { 2243 struct resource_list_entry *rle; 2244 int printed, retval; 2245 2246 printed = 0; 2247 retval = 0; 2248 /* Yes, this is kinda cheating */ 2249 SLIST_FOREACH(rle, rl, link) { 2250 if (rle->type == type) { 2251 if (printed == 0) 2252 retval += kprintf(" %s ", name); 2253 else 2254 retval += kprintf(","); 2255 printed++; 2256 retval += kprintf(format, rle->start); 2257 if (rle->count > 1) { 2258 retval += kprintf("-"); 2259 retval += kprintf(format, rle->start + 2260 rle->count - 1); 2261 } 2262 } 2263 } 2264 return(retval); 2265 } 2266 2267 /* 2268 * Generic driver/device identify functions. These will install a device 2269 * rendezvous point under the parent using the same name as the driver 2270 * name, which will at a later time be probed and attached. 2271 * 2272 * These functions are used when the parent does not 'scan' its bus for 2273 * matching devices, or for the particular devices using these functions, 2274 * or when the device is a pseudo or synthesized device (such as can be 2275 * found under firewire and ppbus). 2276 */ 2277 int 2278 bus_generic_identify(driver_t *driver, device_t parent) 2279 { 2280 if (parent->state == DS_ATTACHED) 2281 return (0); 2282 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); 2283 return (0); 2284 } 2285 2286 int 2287 bus_generic_identify_sameunit(driver_t *driver, device_t parent) 2288 { 2289 if (parent->state == DS_ATTACHED) 2290 return (0); 2291 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); 2292 return (0); 2293 } 2294 2295 /* 2296 * Call DEVICE_IDENTIFY for each driver. 2297 */ 2298 int 2299 bus_generic_probe(device_t dev) 2300 { 2301 devclass_t dc = dev->devclass; 2302 driverlink_t dl; 2303 2304 TAILQ_FOREACH(dl, &dc->drivers, link) { 2305 DEVICE_IDENTIFY(dl->driver, dev); 2306 } 2307 2308 return(0); 2309 } 2310 2311 /* 2312 * This is an aweful hack due to the isa bus and autoconf code not 2313 * probing the ISA devices until after everything else has configured. 2314 * The ISA bus did a dummy attach long ago so we have to set it back 2315 * to an earlier state so the probe thinks its the initial probe and 2316 * not a bus rescan. 2317 * 2318 * XXX remove by properly defering the ISA bus scan. 2319 */ 2320 int 2321 bus_generic_probe_hack(device_t dev) 2322 { 2323 if (dev->state == DS_ATTACHED) { 2324 dev->state = DS_ALIVE; 2325 bus_generic_probe(dev); 2326 dev->state = DS_ATTACHED; 2327 } 2328 return (0); 2329 } 2330 2331 int 2332 bus_generic_attach(device_t dev) 2333 { 2334 device_t child; 2335 2336 TAILQ_FOREACH(child, &dev->children, link) { 2337 device_probe_and_attach(child); 2338 } 2339 2340 return(0); 2341 } 2342 2343 int 2344 bus_generic_detach(device_t dev) 2345 { 2346 device_t child; 2347 int error; 2348 2349 if (dev->state != DS_ATTACHED) 2350 return(EBUSY); 2351 2352 TAILQ_FOREACH(child, &dev->children, link) 2353 if ((error = device_detach(child)) != 0) 2354 return(error); 2355 2356 return 0; 2357 } 2358 2359 int 2360 bus_generic_shutdown(device_t dev) 2361 { 2362 device_t child; 2363 2364 TAILQ_FOREACH(child, &dev->children, link) 2365 device_shutdown(child); 2366 2367 return(0); 2368 } 2369 2370 int 2371 bus_generic_suspend(device_t dev) 2372 { 2373 int error; 2374 device_t child, child2; 2375 2376 TAILQ_FOREACH(child, &dev->children, link) { 2377 error = DEVICE_SUSPEND(child); 2378 if (error) { 2379 for (child2 = TAILQ_FIRST(&dev->children); 2380 child2 && child2 != child; 2381 child2 = TAILQ_NEXT(child2, link)) 2382 DEVICE_RESUME(child2); 2383 return(error); 2384 } 2385 } 2386 return(0); 2387 } 2388 2389 int 2390 bus_generic_resume(device_t dev) 2391 { 2392 device_t child; 2393 2394 TAILQ_FOREACH(child, &dev->children, link) 2395 DEVICE_RESUME(child); 2396 /* if resume fails, there's nothing we can usefully do... */ 2397 2398 return(0); 2399 } 2400 2401 int 2402 bus_print_child_header(device_t dev, device_t child) 2403 { 2404 int retval = 0; 2405 2406 if (device_get_desc(child)) 2407 retval += device_printf(child, "<%s>", device_get_desc(child)); 2408 else 2409 retval += kprintf("%s", device_get_nameunit(child)); 2410 if (bootverbose) { 2411 if (child->state != DS_ATTACHED) 2412 kprintf(" [tentative]"); 2413 else 2414 kprintf(" [attached!]"); 2415 } 2416 return(retval); 2417 } 2418 2419 int 2420 bus_print_child_footer(device_t dev, device_t child) 2421 { 2422 return(kprintf(" on %s\n", device_get_nameunit(dev))); 2423 } 2424 2425 device_t 2426 bus_generic_add_child(device_t dev, device_t child, int order, 2427 const char *name, int unit) 2428 { 2429 if (dev->parent) 2430 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); 2431 else 2432 dev = device_add_child_ordered(child, order, name, unit); 2433 return(dev); 2434 2435 } 2436 2437 int 2438 bus_generic_print_child(device_t dev, device_t child) 2439 { 2440 int retval = 0; 2441 2442 retval += bus_print_child_header(dev, child); 2443 retval += bus_print_child_footer(dev, child); 2444 2445 return(retval); 2446 } 2447 2448 int 2449 bus_generic_read_ivar(device_t dev, device_t child, int index, 2450 uintptr_t * result) 2451 { 2452 int error; 2453 2454 if (dev->parent) 2455 error = BUS_READ_IVAR(dev->parent, child, index, result); 2456 else 2457 error = ENOENT; 2458 return (error); 2459 } 2460 2461 int 2462 bus_generic_write_ivar(device_t dev, device_t child, int index, 2463 uintptr_t value) 2464 { 2465 int error; 2466 2467 if (dev->parent) 2468 error = BUS_WRITE_IVAR(dev->parent, child, index, value); 2469 else 2470 error = ENOENT; 2471 return (error); 2472 } 2473 2474 /* 2475 * Resource list are used for iterations, do not recurse. 2476 */ 2477 struct resource_list * 2478 bus_generic_get_resource_list(device_t dev, device_t child) 2479 { 2480 return (NULL); 2481 } 2482 2483 void 2484 bus_generic_driver_added(device_t dev, driver_t *driver) 2485 { 2486 device_t child; 2487 2488 DEVICE_IDENTIFY(driver, dev); 2489 TAILQ_FOREACH(child, &dev->children, link) { 2490 if (child->state == DS_NOTPRESENT) 2491 device_probe_and_attach(child); 2492 } 2493 } 2494 2495 int 2496 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 2497 int flags, driver_intr_t *intr, void *arg, 2498 void **cookiep, lwkt_serialize_t serializer) 2499 { 2500 /* Propagate up the bus hierarchy until someone handles it. */ 2501 if (dev->parent) 2502 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 2503 intr, arg, cookiep, serializer)); 2504 else 2505 return(EINVAL); 2506 } 2507 2508 int 2509 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 2510 void *cookie) 2511 { 2512 /* Propagate up the bus hierarchy until someone handles it. */ 2513 if (dev->parent) 2514 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 2515 else 2516 return(EINVAL); 2517 } 2518 2519 int 2520 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 2521 { 2522 if (dev->parent) 2523 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 2524 else 2525 return(0); 2526 } 2527 2528 void 2529 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 2530 { 2531 if (dev->parent) 2532 BUS_ENABLE_INTR(dev->parent, child, cookie); 2533 } 2534 2535 int 2536 bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, 2537 enum intr_polarity pol) 2538 { 2539 /* Propagate up the bus hierarchy until someone handles it. */ 2540 if (dev->parent) 2541 return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); 2542 else 2543 return(EINVAL); 2544 } 2545 2546 struct resource * 2547 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 2548 u_long start, u_long end, u_long count, u_int flags) 2549 { 2550 /* Propagate up the bus hierarchy until someone handles it. */ 2551 if (dev->parent) 2552 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 2553 start, end, count, flags)); 2554 else 2555 return(NULL); 2556 } 2557 2558 int 2559 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2560 struct resource *r) 2561 { 2562 /* Propagate up the bus hierarchy until someone handles it. */ 2563 if (dev->parent) 2564 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 2565 else 2566 return(EINVAL); 2567 } 2568 2569 int 2570 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2571 struct resource *r) 2572 { 2573 /* Propagate up the bus hierarchy until someone handles it. */ 2574 if (dev->parent) 2575 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 2576 else 2577 return(EINVAL); 2578 } 2579 2580 int 2581 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2582 int rid, struct resource *r) 2583 { 2584 /* Propagate up the bus hierarchy until someone handles it. */ 2585 if (dev->parent) 2586 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2587 r)); 2588 else 2589 return(EINVAL); 2590 } 2591 2592 int 2593 bus_generic_get_resource(device_t dev, device_t child, int type, int rid, 2594 u_long *startp, u_long *countp) 2595 { 2596 int error; 2597 2598 error = ENOENT; 2599 if (dev->parent) { 2600 error = BUS_GET_RESOURCE(dev->parent, child, type, rid, 2601 startp, countp); 2602 } 2603 return (error); 2604 } 2605 2606 int 2607 bus_generic_set_resource(device_t dev, device_t child, int type, int rid, 2608 u_long start, u_long count) 2609 { 2610 int error; 2611 2612 error = EINVAL; 2613 if (dev->parent) { 2614 error = BUS_SET_RESOURCE(dev->parent, child, type, rid, 2615 start, count); 2616 } 2617 return (error); 2618 } 2619 2620 void 2621 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) 2622 { 2623 if (dev->parent) 2624 BUS_DELETE_RESOURCE(dev, child, type, rid); 2625 } 2626 2627 int 2628 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2629 u_long *startp, u_long *countp) 2630 { 2631 struct resource_list *rl = NULL; 2632 struct resource_list_entry *rle = NULL; 2633 2634 rl = BUS_GET_RESOURCE_LIST(dev, child); 2635 if (!rl) 2636 return(EINVAL); 2637 2638 rle = resource_list_find(rl, type, rid); 2639 if (!rle) 2640 return(ENOENT); 2641 2642 if (startp) 2643 *startp = rle->start; 2644 if (countp) 2645 *countp = rle->count; 2646 2647 return(0); 2648 } 2649 2650 int 2651 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2652 u_long start, u_long count) 2653 { 2654 struct resource_list *rl = NULL; 2655 2656 rl = BUS_GET_RESOURCE_LIST(dev, child); 2657 if (!rl) 2658 return(EINVAL); 2659 2660 resource_list_add(rl, type, rid, start, (start + count - 1), count); 2661 2662 return(0); 2663 } 2664 2665 void 2666 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2667 { 2668 struct resource_list *rl = NULL; 2669 2670 rl = BUS_GET_RESOURCE_LIST(dev, child); 2671 if (!rl) 2672 return; 2673 2674 resource_list_delete(rl, type, rid); 2675 } 2676 2677 int 2678 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2679 int rid, struct resource *r) 2680 { 2681 struct resource_list *rl = NULL; 2682 2683 rl = BUS_GET_RESOURCE_LIST(dev, child); 2684 if (!rl) 2685 return(EINVAL); 2686 2687 return(resource_list_release(rl, dev, child, type, rid, r)); 2688 } 2689 2690 struct resource * 2691 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2692 int *rid, u_long start, u_long end, u_long count, u_int flags) 2693 { 2694 struct resource_list *rl = NULL; 2695 2696 rl = BUS_GET_RESOURCE_LIST(dev, child); 2697 if (!rl) 2698 return(NULL); 2699 2700 return(resource_list_alloc(rl, dev, child, type, rid, 2701 start, end, count, flags)); 2702 } 2703 2704 int 2705 bus_generic_child_present(device_t bus, device_t child) 2706 { 2707 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2708 } 2709 2710 2711 /* 2712 * Some convenience functions to make it easier for drivers to use the 2713 * resource-management functions. All these really do is hide the 2714 * indirection through the parent's method table, making for slightly 2715 * less-wordy code. In the future, it might make sense for this code 2716 * to maintain some sort of a list of resources allocated by each device. 2717 */ 2718 int 2719 bus_alloc_resources(device_t dev, struct resource_spec *rs, 2720 struct resource **res) 2721 { 2722 int i; 2723 2724 for (i = 0; rs[i].type != -1; i++) 2725 res[i] = NULL; 2726 for (i = 0; rs[i].type != -1; i++) { 2727 res[i] = bus_alloc_resource_any(dev, 2728 rs[i].type, &rs[i].rid, rs[i].flags); 2729 if (res[i] == NULL) { 2730 bus_release_resources(dev, rs, res); 2731 return (ENXIO); 2732 } 2733 } 2734 return (0); 2735 } 2736 2737 void 2738 bus_release_resources(device_t dev, const struct resource_spec *rs, 2739 struct resource **res) 2740 { 2741 int i; 2742 2743 for (i = 0; rs[i].type != -1; i++) 2744 if (res[i] != NULL) { 2745 bus_release_resource( 2746 dev, rs[i].type, rs[i].rid, res[i]); 2747 res[i] = NULL; 2748 } 2749 } 2750 2751 struct resource * 2752 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2753 u_long count, u_int flags) 2754 { 2755 if (dev->parent == 0) 2756 return(0); 2757 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2758 count, flags)); 2759 } 2760 2761 int 2762 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2763 { 2764 if (dev->parent == 0) 2765 return(EINVAL); 2766 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2767 } 2768 2769 int 2770 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2771 { 2772 if (dev->parent == 0) 2773 return(EINVAL); 2774 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2775 } 2776 2777 int 2778 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2779 { 2780 if (dev->parent == 0) 2781 return(EINVAL); 2782 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2783 } 2784 2785 int 2786 bus_setup_intr(device_t dev, struct resource *r, int flags, 2787 driver_intr_t handler, void *arg, 2788 void **cookiep, lwkt_serialize_t serializer) 2789 { 2790 if (dev->parent == 0) 2791 return(EINVAL); 2792 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2793 cookiep, serializer)); 2794 } 2795 2796 int 2797 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2798 { 2799 if (dev->parent == 0) 2800 return(EINVAL); 2801 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2802 } 2803 2804 void 2805 bus_enable_intr(device_t dev, void *cookie) 2806 { 2807 if (dev->parent) 2808 BUS_ENABLE_INTR(dev->parent, dev, cookie); 2809 } 2810 2811 int 2812 bus_disable_intr(device_t dev, void *cookie) 2813 { 2814 if (dev->parent) 2815 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 2816 else 2817 return(0); 2818 } 2819 2820 int 2821 bus_set_resource(device_t dev, int type, int rid, 2822 u_long start, u_long count) 2823 { 2824 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2825 start, count)); 2826 } 2827 2828 int 2829 bus_get_resource(device_t dev, int type, int rid, 2830 u_long *startp, u_long *countp) 2831 { 2832 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2833 startp, countp)); 2834 } 2835 2836 u_long 2837 bus_get_resource_start(device_t dev, int type, int rid) 2838 { 2839 u_long start, count; 2840 int error; 2841 2842 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2843 &start, &count); 2844 if (error) 2845 return(0); 2846 return(start); 2847 } 2848 2849 u_long 2850 bus_get_resource_count(device_t dev, int type, int rid) 2851 { 2852 u_long start, count; 2853 int error; 2854 2855 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2856 &start, &count); 2857 if (error) 2858 return(0); 2859 return(count); 2860 } 2861 2862 void 2863 bus_delete_resource(device_t dev, int type, int rid) 2864 { 2865 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2866 } 2867 2868 int 2869 bus_child_present(device_t child) 2870 { 2871 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2872 } 2873 2874 int 2875 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2876 { 2877 device_t parent; 2878 2879 parent = device_get_parent(child); 2880 if (parent == NULL) { 2881 *buf = '\0'; 2882 return (0); 2883 } 2884 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2885 } 2886 2887 int 2888 bus_child_location_str(device_t child, char *buf, size_t buflen) 2889 { 2890 device_t parent; 2891 2892 parent = device_get_parent(child); 2893 if (parent == NULL) { 2894 *buf = '\0'; 2895 return (0); 2896 } 2897 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2898 } 2899 2900 static int 2901 root_print_child(device_t dev, device_t child) 2902 { 2903 return(0); 2904 } 2905 2906 static int 2907 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2908 void **cookiep, lwkt_serialize_t serializer) 2909 { 2910 /* 2911 * If an interrupt mapping gets to here something bad has happened. 2912 */ 2913 panic("root_setup_intr"); 2914 } 2915 2916 /* 2917 * If we get here, assume that the device is permanant and really is 2918 * present in the system. Removable bus drivers are expected to intercept 2919 * this call long before it gets here. We return -1 so that drivers that 2920 * really care can check vs -1 or some ERRNO returned higher in the food 2921 * chain. 2922 */ 2923 static int 2924 root_child_present(device_t dev, device_t child) 2925 { 2926 return(-1); 2927 } 2928 2929 /* 2930 * XXX NOTE! other defaults may be set in bus_if.m 2931 */ 2932 static kobj_method_t root_methods[] = { 2933 /* Device interface */ 2934 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2935 KOBJMETHOD(device_suspend, bus_generic_suspend), 2936 KOBJMETHOD(device_resume, bus_generic_resume), 2937 2938 /* Bus interface */ 2939 KOBJMETHOD(bus_add_child, bus_generic_add_child), 2940 KOBJMETHOD(bus_print_child, root_print_child), 2941 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2942 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2943 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2944 KOBJMETHOD(bus_child_present, root_child_present), 2945 2946 { 0, 0 } 2947 }; 2948 2949 static driver_t root_driver = { 2950 "root", 2951 root_methods, 2952 1, /* no softc */ 2953 }; 2954 2955 device_t root_bus; 2956 devclass_t root_devclass; 2957 2958 static int 2959 root_bus_module_handler(module_t mod, int what, void* arg) 2960 { 2961 switch (what) { 2962 case MOD_LOAD: 2963 TAILQ_INIT(&bus_data_devices); 2964 root_bus = make_device(NULL, "root", 0); 2965 root_bus->desc = "System root bus"; 2966 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2967 root_bus->driver = &root_driver; 2968 root_bus->state = DS_ALIVE; 2969 root_devclass = devclass_find_internal("root", NULL, FALSE); 2970 devinit(); 2971 return(0); 2972 2973 case MOD_SHUTDOWN: 2974 device_shutdown(root_bus); 2975 return(0); 2976 default: 2977 return(0); 2978 } 2979 } 2980 2981 static moduledata_t root_bus_mod = { 2982 "rootbus", 2983 root_bus_module_handler, 2984 0 2985 }; 2986 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2987 2988 void 2989 root_bus_configure(void) 2990 { 2991 int warncount; 2992 device_t dev; 2993 2994 PDEBUG((".")); 2995 2996 /* 2997 * handle device_identify based device attachments to the root_bus 2998 * (typically nexus). 2999 */ 3000 bus_generic_probe(root_bus); 3001 3002 /* 3003 * Probe and attach the devices under root_bus. 3004 */ 3005 TAILQ_FOREACH(dev, &root_bus->children, link) { 3006 device_probe_and_attach(dev); 3007 } 3008 3009 /* 3010 * Wait for all asynchronous attaches to complete. If we don't 3011 * our legacy ISA bus scan could steal device unit numbers or 3012 * even I/O ports. 3013 */ 3014 warncount = 10; 3015 if (numasyncthreads) 3016 kprintf("Waiting for async drivers to attach\n"); 3017 while (numasyncthreads > 0) { 3018 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK) 3019 --warncount; 3020 if (warncount == 0) { 3021 kprintf("Warning: Still waiting for %d " 3022 "drivers to attach\n", numasyncthreads); 3023 } else if (warncount == -30) { 3024 kprintf("Giving up on %d drivers\n", numasyncthreads); 3025 break; 3026 } 3027 } 3028 root_bus->state = DS_ATTACHED; 3029 } 3030 3031 int 3032 driver_module_handler(module_t mod, int what, void *arg) 3033 { 3034 int error; 3035 struct driver_module_data *dmd; 3036 devclass_t bus_devclass; 3037 kobj_class_t driver; 3038 const char *parentname; 3039 3040 dmd = (struct driver_module_data *)arg; 3041 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 3042 error = 0; 3043 3044 switch (what) { 3045 case MOD_LOAD: 3046 if (dmd->dmd_chainevh) 3047 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3048 3049 driver = dmd->dmd_driver; 3050 PDEBUG(("Loading module: driver %s on bus %s", 3051 DRIVERNAME(driver), dmd->dmd_busname)); 3052 3053 /* 3054 * If the driver has any base classes, make the 3055 * devclass inherit from the devclass of the driver's 3056 * first base class. This will allow the system to 3057 * search for drivers in both devclasses for children 3058 * of a device using this driver. 3059 */ 3060 if (driver->baseclasses) 3061 parentname = driver->baseclasses[0]->name; 3062 else 3063 parentname = NULL; 3064 *dmd->dmd_devclass = devclass_find_internal(driver->name, 3065 parentname, TRUE); 3066 3067 error = devclass_add_driver(bus_devclass, driver); 3068 if (error) 3069 break; 3070 break; 3071 3072 case MOD_UNLOAD: 3073 PDEBUG(("Unloading module: driver %s from bus %s", 3074 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 3075 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 3076 3077 if (!error && dmd->dmd_chainevh) 3078 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3079 break; 3080 } 3081 3082 return (error); 3083 } 3084 3085 #ifdef BUS_DEBUG 3086 3087 /* 3088 * The _short versions avoid iteration by not calling anything that prints 3089 * more than oneliners. I love oneliners. 3090 */ 3091 3092 static void 3093 print_device_short(device_t dev, int indent) 3094 { 3095 if (!dev) 3096 return; 3097 3098 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 3099 dev->unit, dev->desc, 3100 (dev->parent? "":"no "), 3101 (TAILQ_EMPTY(&dev->children)? "no ":""), 3102 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 3103 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 3104 (dev->flags&DF_WILDCARD? "wildcard,":""), 3105 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 3106 (dev->ivars? "":"no "), 3107 (dev->softc? "":"no "), 3108 dev->busy)); 3109 } 3110 3111 static void 3112 print_device(device_t dev, int indent) 3113 { 3114 if (!dev) 3115 return; 3116 3117 print_device_short(dev, indent); 3118 3119 indentprintf(("Parent:\n")); 3120 print_device_short(dev->parent, indent+1); 3121 indentprintf(("Driver:\n")); 3122 print_driver_short(dev->driver, indent+1); 3123 indentprintf(("Devclass:\n")); 3124 print_devclass_short(dev->devclass, indent+1); 3125 } 3126 3127 /* 3128 * Print the device and all its children (indented). 3129 */ 3130 void 3131 print_device_tree_short(device_t dev, int indent) 3132 { 3133 device_t child; 3134 3135 if (!dev) 3136 return; 3137 3138 print_device_short(dev, indent); 3139 3140 TAILQ_FOREACH(child, &dev->children, link) 3141 print_device_tree_short(child, indent+1); 3142 } 3143 3144 /* 3145 * Print the device and all its children (indented). 3146 */ 3147 void 3148 print_device_tree(device_t dev, int indent) 3149 { 3150 device_t child; 3151 3152 if (!dev) 3153 return; 3154 3155 print_device(dev, indent); 3156 3157 TAILQ_FOREACH(child, &dev->children, link) 3158 print_device_tree(child, indent+1); 3159 } 3160 3161 static void 3162 print_driver_short(driver_t *driver, int indent) 3163 { 3164 if (!driver) 3165 return; 3166 3167 indentprintf(("driver %s: softc size = %d\n", 3168 driver->name, driver->size)); 3169 } 3170 3171 static void 3172 print_driver(driver_t *driver, int indent) 3173 { 3174 if (!driver) 3175 return; 3176 3177 print_driver_short(driver, indent); 3178 } 3179 3180 3181 static void 3182 print_driver_list(driver_list_t drivers, int indent) 3183 { 3184 driverlink_t driver; 3185 3186 TAILQ_FOREACH(driver, &drivers, link) 3187 print_driver(driver->driver, indent); 3188 } 3189 3190 static void 3191 print_devclass_short(devclass_t dc, int indent) 3192 { 3193 if (!dc) 3194 return; 3195 3196 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 3197 } 3198 3199 static void 3200 print_devclass(devclass_t dc, int indent) 3201 { 3202 int i; 3203 3204 if (!dc) 3205 return; 3206 3207 print_devclass_short(dc, indent); 3208 indentprintf(("Drivers:\n")); 3209 print_driver_list(dc->drivers, indent+1); 3210 3211 indentprintf(("Devices:\n")); 3212 for (i = 0; i < dc->maxunit; i++) 3213 if (dc->devices[i]) 3214 print_device(dc->devices[i], indent+1); 3215 } 3216 3217 void 3218 print_devclass_list_short(void) 3219 { 3220 devclass_t dc; 3221 3222 kprintf("Short listing of devclasses, drivers & devices:\n"); 3223 TAILQ_FOREACH(dc, &devclasses, link) { 3224 print_devclass_short(dc, 0); 3225 } 3226 } 3227 3228 void 3229 print_devclass_list(void) 3230 { 3231 devclass_t dc; 3232 3233 kprintf("Full listing of devclasses, drivers & devices:\n"); 3234 TAILQ_FOREACH(dc, &devclasses, link) { 3235 print_devclass(dc, 0); 3236 } 3237 } 3238 3239 #endif 3240 3241 /* 3242 * Check to see if a device is disabled via a disabled hint. 3243 */ 3244 int 3245 resource_disabled(const char *name, int unit) 3246 { 3247 int error, value; 3248 3249 error = resource_int_value(name, unit, "disabled", &value); 3250 if (error) 3251 return(0); 3252 return(value); 3253 } 3254 3255 /* 3256 * User-space access to the device tree. 3257 * 3258 * We implement a small set of nodes: 3259 * 3260 * hw.bus Single integer read method to obtain the 3261 * current generation count. 3262 * hw.bus.devices Reads the entire device tree in flat space. 3263 * hw.bus.rman Resource manager interface 3264 * 3265 * We might like to add the ability to scan devclasses and/or drivers to 3266 * determine what else is currently loaded/available. 3267 */ 3268 3269 static int 3270 sysctl_bus(SYSCTL_HANDLER_ARGS) 3271 { 3272 struct u_businfo ubus; 3273 3274 ubus.ub_version = BUS_USER_VERSION; 3275 ubus.ub_generation = bus_data_generation; 3276 3277 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 3278 } 3279 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 3280 "bus-related data"); 3281 3282 static int 3283 sysctl_devices(SYSCTL_HANDLER_ARGS) 3284 { 3285 int *name = (int *)arg1; 3286 u_int namelen = arg2; 3287 int index; 3288 struct device *dev; 3289 struct u_device udev; /* XXX this is a bit big */ 3290 int error; 3291 3292 if (namelen != 2) 3293 return (EINVAL); 3294 3295 if (bus_data_generation_check(name[0])) 3296 return (EINVAL); 3297 3298 index = name[1]; 3299 3300 /* 3301 * Scan the list of devices, looking for the requested index. 3302 */ 3303 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 3304 if (index-- == 0) 3305 break; 3306 } 3307 if (dev == NULL) 3308 return (ENOENT); 3309 3310 /* 3311 * Populate the return array. 3312 */ 3313 bzero(&udev, sizeof(udev)); 3314 udev.dv_handle = (uintptr_t)dev; 3315 udev.dv_parent = (uintptr_t)dev->parent; 3316 if (dev->nameunit != NULL) 3317 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 3318 if (dev->desc != NULL) 3319 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 3320 if (dev->driver != NULL && dev->driver->name != NULL) 3321 strlcpy(udev.dv_drivername, dev->driver->name, 3322 sizeof(udev.dv_drivername)); 3323 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 3324 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 3325 udev.dv_devflags = dev->devflags; 3326 udev.dv_flags = dev->flags; 3327 udev.dv_state = dev->state; 3328 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 3329 return (error); 3330 } 3331 3332 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 3333 "system device tree"); 3334 3335 int 3336 bus_data_generation_check(int generation) 3337 { 3338 if (generation != bus_data_generation) 3339 return (1); 3340 3341 /* XXX generate optimised lists here? */ 3342 return (0); 3343 } 3344 3345 void 3346 bus_data_generation_update(void) 3347 { 3348 bus_data_generation++; 3349 } 3350