subr_bus.c revision 58136
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: head/sys/kern/subr_bus.c 58136 2000-03-16 09:32:59Z n_hibma $ 27 */ 28 29#include "opt_bus.h" 30 31#include <sys/param.h> 32#include <sys/queue.h> 33#include <sys/malloc.h> 34#include <sys/kernel.h> 35#include <sys/module.h> 36#ifdef DEVICE_SYSCTLS 37#include <sys/sysctl.h> 38#endif 39#include <sys/bus_private.h> 40#include <sys/systm.h> 41#include <machine/bus.h> 42#include <sys/rman.h> 43#include <machine/stdarg.h> /* for device_printf() */ 44 45MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 46 47#ifdef BUS_DEBUG 48#define PDEBUG(a) (printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n")) 49#define DEVICENAME(d) ((d)? device_get_name(d): "no device") 50#define DRIVERNAME(d) ((d)? d->name : "no driver") 51#define DEVCLANAME(d) ((d)? d->name : "no devclass") 52 53/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 54 * prevent syslog from deleting initial spaces 55 */ 56#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while(0) 57 58static void print_method_list(device_method_t *m, int indent); 59static void print_device_ops(device_ops_t ops, int indent); 60static void print_device_short(device_t dev, int indent); 61static void print_device(device_t dev, int indent); 62void print_device_tree_short(device_t dev, int indent); 63void print_device_tree(device_t dev, int indent); 64static void print_driver_short(driver_t *driver, int indent); 65static void print_driver(driver_t *driver, int indent); 66static void print_driver_list(driver_list_t drivers, int indent); 67static void print_devclass_short(devclass_t dc, int indent); 68static void print_devclass(devclass_t dc, int indent); 69void print_devclass_list_short(void); 70void print_devclass_list(void); 71 72#else 73/* Make the compiler ignore the function calls */ 74#define PDEBUG(a) /* nop */ 75#define DEVICENAME(d) /* nop */ 76#define DRIVERNAME(d) /* nop */ 77#define DEVCLANAME(d) /* nop */ 78 79#define print_method_list(m,i) /* nop */ 80#define print_device_ops(o,i) /* nop */ 81#define print_device_short(d,i) /* nop */ 82#define print_device(d,i) /* nop */ 83#define print_device_tree_short(d,i) /* nop */ 84#define print_device_tree(d,i) /* nop */ 85#define print_driver_short(d,i) /* nop */ 86#define print_driver(d,i) /* nop */ 87#define print_driver_list(d,i) /* nop */ 88#define print_devclass_short(d,i) /* nop */ 89#define print_devclass(d,i) /* nop */ 90#define print_devclass_list_short() /* nop */ 91#define print_devclass_list() /* nop */ 92#endif 93 94#ifdef DEVICE_SYSCTLS 95static void device_register_oids(device_t dev); 96static void device_unregister_oids(device_t dev); 97#endif 98 99/* 100 * Method table handling 101 */ 102static int error_method(void); 103static int next_method_offset = 1; 104 105LIST_HEAD(methodlist, method) methods; 106struct method { 107 LIST_ENTRY(method) link; /* linked list of methods */ 108 int offset; /* offset in method table */ 109 int refs; /* count of device_op_desc users */ 110 devop_t deflt; /* default implementation */ 111 char* name; /* unique name of method */ 112}; 113 114static void 115register_method(struct device_op_desc *desc) 116{ 117 struct method* m; 118 119 if (desc->method) { 120 desc->method->refs++; 121 return; 122 } 123 124 /* 125 * Make sure that desc->deflt is always valid to simplify dispatch. 126 */ 127 if (!desc->deflt) 128 desc->deflt = error_method; 129 130 for (m = LIST_FIRST(&methods); m; m = LIST_NEXT(m, link)) { 131 if (!strcmp(m->name, desc->name)) { 132 desc->offset = m->offset; 133 desc->method = m; 134 m->refs++; 135 PDEBUG(("method %p has the same name, %s, with offset %d", 136 (void *)m, desc->name, desc->offset)); 137 return; 138 } 139 } 140 141 m = (struct method *) malloc(sizeof(struct method) 142 + strlen(desc->name) + 1, 143 M_BUS, M_NOWAIT); 144 if (!m) 145 panic("register_method: out of memory"); 146 bzero(m, sizeof(struct method) + strlen(desc->name) + 1); 147 m->offset = next_method_offset++; 148 m->refs = 1; 149 m->deflt = desc->deflt; 150 m->name = (char*) (m + 1); 151 strcpy(m->name, desc->name); 152 LIST_INSERT_HEAD(&methods, m, link); 153 154 desc->offset = m->offset; 155 desc->method = m; 156} 157 158static void 159unregister_method(struct device_op_desc *desc) 160{ 161 struct method *m = desc->method; 162 m->refs--; 163 if (m->refs == 0) { 164 PDEBUG(("method %s, reached refcount 0", desc->name)); 165 LIST_REMOVE(m, link); 166 free(m, M_BUS); 167 desc->method = 0; 168 } 169} 170 171static int error_method(void) 172{ 173 return ENXIO; 174} 175 176static struct device_ops null_ops = { 177 1, 178 { error_method } 179}; 180 181static void 182compile_methods(driver_t *driver) 183{ 184 device_ops_t ops; 185 struct device_method *m; 186 struct method *cm; 187 int i; 188 189 /* 190 * First register any methods which need it. 191 */ 192 for (i = 0, m = driver->methods; m->desc; i++, m++) 193 register_method(m->desc); 194 195 /* 196 * Then allocate the compiled op table. 197 */ 198 ops = malloc(sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t), 199 M_BUS, M_NOWAIT); 200 if (!ops) 201 panic("compile_methods: out of memory"); 202 bzero(ops, sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t)); 203 204 ops->maxoffset = next_method_offset; 205 /* Fill in default methods and then overwrite with driver methods */ 206 for (i = 0; i < next_method_offset; i++) 207 ops->methods[i] = error_method; 208 for (cm = LIST_FIRST(&methods); cm; cm = LIST_NEXT(cm, link)) { 209 if (cm->deflt) 210 ops->methods[cm->offset] = cm->deflt; 211 } 212 for (i = 0, m = driver->methods; m->desc; i++, m++) 213 ops->methods[m->desc->offset] = m->func; 214 PDEBUG(("%s has %d method%s, wasting %d bytes", 215 DRIVERNAME(driver), i, (i==1?"":"s"), 216 (next_method_offset-i)*sizeof(devop_t))); 217 218 driver->ops = ops; 219} 220 221static void 222free_methods(driver_t *driver) 223{ 224 int i; 225 struct device_method *m; 226 227 /* 228 * Unregister any methods which are no longer used. 229 */ 230 for (i = 0, m = driver->methods; m->desc; i++, m++) 231 unregister_method(m->desc); 232 233 /* 234 * Free memory and clean up. 235 */ 236 free(driver->ops, M_BUS); 237 driver->ops = 0; 238} 239 240/* 241 * Devclass implementation 242 */ 243 244static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 245 246static devclass_t 247devclass_find_internal(const char *classname, int create) 248{ 249 devclass_t dc; 250 251 PDEBUG(("looking for %s", classname)); 252 if (!classname) 253 return NULL; 254 255 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 256 if (!strcmp(dc->name, classname)) 257 return dc; 258 259 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 260 if (create) { 261 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 262 M_BUS, M_NOWAIT); 263 if (!dc) 264 return NULL; 265 bzero(dc, sizeof(struct devclass) + strlen(classname) + 1); 266 dc->name = (char*) (dc + 1); 267 strcpy(dc->name, classname); 268 dc->devices = NULL; 269 dc->maxunit = 0; 270 TAILQ_INIT(&dc->drivers); 271 TAILQ_INSERT_TAIL(&devclasses, dc, link); 272 } 273 274 return dc; 275} 276 277devclass_t 278devclass_create(const char *classname) 279{ 280 return devclass_find_internal(classname, TRUE); 281} 282 283devclass_t 284devclass_find(const char *classname) 285{ 286 return devclass_find_internal(classname, FALSE); 287} 288 289int 290devclass_add_driver(devclass_t dc, driver_t *driver) 291{ 292 driverlink_t dl; 293 int i; 294 295 PDEBUG(("%s", DRIVERNAME(driver))); 296 297 dl = malloc(sizeof *dl, M_BUS, M_NOWAIT); 298 if (!dl) 299 return ENOMEM; 300 bzero(dl, sizeof *dl); 301 302 /* 303 * Compile the driver's methods. 304 */ 305 if (!driver->ops) 306 compile_methods(driver); 307 308 /* 309 * Make sure the devclass which the driver is implementing exists. 310 */ 311 devclass_find_internal(driver->name, TRUE); 312 313 dl->driver = driver; 314 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 315 driver->refs++; 316 317 /* 318 * Call BUS_DRIVER_ADDED for any existing busses in this class. 319 */ 320 for (i = 0; i < dc->maxunit; i++) 321 if (dc->devices[i]) 322 BUS_DRIVER_ADDED(dc->devices[i], driver); 323 324 return 0; 325} 326 327int 328devclass_delete_driver(devclass_t busclass, driver_t *driver) 329{ 330 devclass_t dc = devclass_find(driver->name); 331 driverlink_t dl; 332 device_t dev; 333 int i; 334 int error; 335 336 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 337 338 if (!dc) 339 return 0; 340 341 /* 342 * Find the link structure in the bus' list of drivers. 343 */ 344 for (dl = TAILQ_FIRST(&busclass->drivers); dl; 345 dl = TAILQ_NEXT(dl, link)) { 346 if (dl->driver == driver) 347 break; 348 } 349 350 if (!dl) { 351 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 352 return ENOENT; 353 } 354 355 /* 356 * Disassociate from any devices. We iterate through all the 357 * devices in the devclass of the driver and detach any which are 358 * using the driver and which have a parent in the devclass which 359 * we are deleting from. 360 * 361 * Note that since a driver can be in multiple devclasses, we 362 * should not detach devices which are not children of devices in 363 * the affected devclass. 364 */ 365 for (i = 0; i < dc->maxunit; i++) { 366 if (dc->devices[i]) { 367 dev = dc->devices[i]; 368 if (dev->driver == driver 369 && dev->parent && dev->parent->devclass == busclass) { 370 if ((error = device_detach(dev)) != 0) 371 return error; 372 device_set_driver(dev, NULL); 373 } 374 } 375 } 376 377 TAILQ_REMOVE(&busclass->drivers, dl, link); 378 free(dl, M_BUS); 379 380 driver->refs--; 381 if (driver->refs == 0) 382 free_methods(driver); 383 384 return 0; 385} 386 387static driverlink_t 388devclass_find_driver_internal(devclass_t dc, const char *classname) 389{ 390 driverlink_t dl; 391 392 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 393 394 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) { 395 if (!strcmp(dl->driver->name, classname)) 396 return dl; 397 } 398 399 PDEBUG(("not found")); 400 return NULL; 401} 402 403driver_t * 404devclass_find_driver(devclass_t dc, const char *classname) 405{ 406 driverlink_t dl; 407 408 dl = devclass_find_driver_internal(dc, classname); 409 if (dl) 410 return dl->driver; 411 else 412 return NULL; 413} 414 415const char * 416devclass_get_name(devclass_t dc) 417{ 418 return dc->name; 419} 420 421device_t 422devclass_get_device(devclass_t dc, int unit) 423{ 424 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 425 return NULL; 426 return dc->devices[unit]; 427} 428 429void * 430devclass_get_softc(devclass_t dc, int unit) 431{ 432 device_t dev; 433 434 dev = devclass_get_device(dc, unit); 435 if (!dev) 436 return (NULL); 437 438 return (device_get_softc(dev)); 439} 440 441int 442devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 443{ 444 int i; 445 int count; 446 device_t *list; 447 448 count = 0; 449 for (i = 0; i < dc->maxunit; i++) 450 if (dc->devices[i]) 451 count++; 452 453 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 454 if (!list) 455 return ENOMEM; 456 bzero(list, count * sizeof(device_t)); 457 458 count = 0; 459 for (i = 0; i < dc->maxunit; i++) 460 if (dc->devices[i]) { 461 list[count] = dc->devices[i]; 462 count++; 463 } 464 465 *devlistp = list; 466 *devcountp = count; 467 468 return 0; 469} 470 471int 472devclass_get_maxunit(devclass_t dc) 473{ 474 return dc->maxunit; 475} 476 477static int 478devclass_alloc_unit(devclass_t dc, int *unitp) 479{ 480 int unit = *unitp; 481 482 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 483 484 /* 485 * If we have been given a wired unit number, check for existing 486 * device. 487 */ 488 if (unit != -1) { 489 if (unit >= 0 && unit < dc->maxunit && dc->devices[unit] != NULL) { 490 if (bootverbose) 491 printf("%s-: %s%d exists, using next available unit number\n", 492 dc->name, dc->name, unit); 493 unit = -1; 494 } 495 } 496 497 /* 498 * We ended up with an unwired device, so let's find the next available 499 * slot for it. 500 */ 501 if (unit == -1) { 502 unit = 0; 503 while (unit < dc->maxunit && dc->devices[unit] != NULL) 504 unit++; 505 } 506 507 /* 508 * We've selected a unit beyond the length of the table, so let's extend 509 * the table to make room for all units up to and including this one. 510 */ 511 if (unit >= dc->maxunit) { 512 device_t *newlist; 513 int newsize; 514 515 newsize = (dc->maxunit ? 2 * dc->maxunit 516 : MINALLOCSIZE / sizeof(device_t)); 517 newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT); 518 if (!newlist) 519 return ENOMEM; 520 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 521 bzero(newlist + dc->maxunit, 522 sizeof(device_t) * (newsize - dc->maxunit)); 523 if (dc->devices) 524 free(dc->devices, M_BUS); 525 dc->devices = newlist; 526 dc->maxunit = newsize; 527 } 528 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 529 530 *unitp = unit; 531 return 0; 532} 533 534static int 535devclass_add_device(devclass_t dc, device_t dev) 536{ 537 int buflen, error; 538 539 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 540 541 buflen = strlen(dc->name) + 5; 542 dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT); 543 if (!dev->nameunit) 544 return ENOMEM; 545 bzero(dev->nameunit, buflen); 546 547 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 548 free(dev->nameunit, M_BUS); 549 dev->nameunit = NULL; 550 return error; 551 } 552 dc->devices[dev->unit] = dev; 553 dev->devclass = dc; 554 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 555 556#ifdef DEVICE_SYSCTLS 557 device_register_oids(dev); 558#endif 559 560 return 0; 561} 562 563static int 564devclass_delete_device(devclass_t dc, device_t dev) 565{ 566 if (!dc || !dev) 567 return 0; 568 569 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 570 571 if (dev->devclass != dc 572 || dc->devices[dev->unit] != dev) 573 panic("devclass_delete_device: inconsistent device class"); 574 dc->devices[dev->unit] = NULL; 575 if (dev->flags & DF_WILDCARD) 576 dev->unit = -1; 577 dev->devclass = NULL; 578 free(dev->nameunit, M_BUS); 579 dev->nameunit = NULL; 580 581#ifdef DEVICE_SYSCTLS 582 device_unregister_oids(dev); 583#endif 584 585 return 0; 586} 587 588static device_t 589make_device(device_t parent, const char *name, int unit) 590{ 591 device_t dev; 592 devclass_t dc; 593 594 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 595 596 if (name) { 597 dc = devclass_find_internal(name, TRUE); 598 if (!dc) { 599 printf("make_device: can't find device class %s\n", name); 600 return NULL; 601 } 602 } else 603 dc = NULL; 604 605 dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT); 606 if (!dev) 607 return 0; 608 bzero(dev, sizeof(struct device)); 609 610 dev->parent = parent; 611 TAILQ_INIT(&dev->children); 612 dev->ops = &null_ops; 613 dev->driver = NULL; 614 dev->devclass = NULL; 615 dev->unit = unit; 616 dev->nameunit = NULL; 617 dev->desc = NULL; 618 dev->busy = 0; 619 dev->devflags = 0; 620 dev->flags = DF_ENABLED; 621 dev->order = 0; 622 if (unit == -1) 623 dev->flags |= DF_WILDCARD; 624 if (name) { 625 dev->flags |= DF_FIXEDCLASS; 626 devclass_add_device(dc, dev); 627 } 628 dev->ivars = NULL; 629 dev->softc = NULL; 630 631 dev->state = DS_NOTPRESENT; 632 633 return dev; 634} 635 636static int 637device_print_child(device_t dev, device_t child) 638{ 639 int retval = 0; 640 641 if (device_is_alive(child)) { 642 retval += BUS_PRINT_CHILD(dev, child); 643 } else 644 retval += device_printf(child, " not found\n"); 645 646 return (retval); 647} 648 649device_t 650device_add_child(device_t dev, const char *name, int unit) 651{ 652 return device_add_child_ordered(dev, 0, name, unit); 653} 654 655device_t 656device_add_child_ordered(device_t dev, int order, const char *name, int unit) 657{ 658 device_t child; 659 device_t place; 660 661 PDEBUG(("%s at %s with order %d as unit %d", 662 name, DEVICENAME(dev), order, unit)); 663 664 child = make_device(dev, name, unit); 665 if (child == NULL) 666 return child; 667 child->order = order; 668 669 TAILQ_FOREACH(place, &dev->children, link) 670 if (place->order > order) 671 break; 672 673 if (place) { 674 /* 675 * The device 'place' is the first device whose order is 676 * greater than the new child. 677 */ 678 TAILQ_INSERT_BEFORE(place, child, link); 679 } else { 680 /* 681 * The new child's order is greater or equal to the order of 682 * any existing device. Add the child to the tail of the list. 683 */ 684 TAILQ_INSERT_TAIL(&dev->children, child, link); 685 } 686 687 return child; 688} 689 690int 691device_delete_child(device_t dev, device_t child) 692{ 693 int error; 694 device_t grandchild; 695 696 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 697 698 /* remove children first */ 699 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 700 error = device_delete_child(child, grandchild); 701 if (error) 702 return error; 703 } 704 705 if ((error = device_detach(child)) != 0) 706 return error; 707 if (child->devclass) 708 devclass_delete_device(child->devclass, child); 709 TAILQ_REMOVE(&dev->children, child, link); 710 device_set_desc(child, NULL); 711 free(child, M_BUS); 712 713 return 0; 714} 715 716/* 717 * Find only devices attached to this bus. 718 */ 719device_t 720device_find_child(device_t dev, const char *classname, int unit) 721{ 722 devclass_t dc; 723 device_t child; 724 725 dc = devclass_find(classname); 726 if (!dc) 727 return NULL; 728 729 child = devclass_get_device(dc, unit); 730 if (child && child->parent == dev) 731 return child; 732 return NULL; 733} 734 735static driverlink_t 736first_matching_driver(devclass_t dc, device_t dev) 737{ 738 if (dev->devclass) 739 return devclass_find_driver_internal(dc, dev->devclass->name); 740 else 741 return TAILQ_FIRST(&dc->drivers); 742} 743 744static driverlink_t 745next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 746{ 747 if (dev->devclass) { 748 driverlink_t dl; 749 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 750 if (!strcmp(dev->devclass->name, dl->driver->name)) 751 return dl; 752 return NULL; 753 } else 754 return TAILQ_NEXT(last, link); 755} 756 757static int 758device_probe_child(device_t dev, device_t child) 759{ 760 devclass_t dc; 761 driverlink_t best = 0; 762 driverlink_t dl; 763 int result, pri = 0; 764 int hasclass = (child->devclass != 0); 765 766 dc = dev->devclass; 767 if (!dc) 768 panic("device_probe_child: parent device has no devclass"); 769 770 if (child->state == DS_ALIVE) 771 return 0; 772 773 for (dl = first_matching_driver(dc, child); 774 dl; 775 dl = next_matching_driver(dc, child, dl)) { 776 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 777 device_set_driver(child, dl->driver); 778 if (!hasclass) 779 device_set_devclass(child, dl->driver->name); 780 result = DEVICE_PROBE(child); 781 if (!hasclass) 782 device_set_devclass(child, 0); 783 784 /* 785 * If the driver returns SUCCESS, there can be no higher match 786 * for this device. 787 */ 788 if (result == 0) { 789 best = dl; 790 pri = 0; 791 break; 792 } 793 794 /* 795 * The driver returned an error so it certainly doesn't match. 796 */ 797 if (result > 0) { 798 device_set_driver(child, 0); 799 continue; 800 } 801 802 /* 803 * A priority lower than SUCCESS, remember the best matching 804 * driver. Initialise the value of pri for the first match. 805 */ 806 if (best == 0 || result > pri) { 807 best = dl; 808 pri = result; 809 continue; 810 } 811 } 812 813 /* 814 * If we found a driver, change state and initialise the devclass. 815 */ 816 if (best) { 817 if (!child->devclass) 818 device_set_devclass(child, best->driver->name); 819 device_set_driver(child, best->driver); 820 if (pri < 0) { 821 /* 822 * A bit bogus. Call the probe method again to make sure 823 * that we have the right description. 824 */ 825 DEVICE_PROBE(child); 826 } 827 child->state = DS_ALIVE; 828 return 0; 829 } 830 831 return ENXIO; 832} 833 834device_t 835device_get_parent(device_t dev) 836{ 837 return dev->parent; 838} 839 840int 841device_get_children(device_t dev, device_t **devlistp, int *devcountp) 842{ 843 int count; 844 device_t child; 845 device_t *list; 846 847 count = 0; 848 for (child = TAILQ_FIRST(&dev->children); child; 849 child = TAILQ_NEXT(child, link)) 850 count++; 851 852 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 853 if (!list) 854 return ENOMEM; 855 bzero(list, count * sizeof(device_t)); 856 857 count = 0; 858 for (child = TAILQ_FIRST(&dev->children); child; 859 child = TAILQ_NEXT(child, link)) { 860 list[count] = child; 861 count++; 862 } 863 864 *devlistp = list; 865 *devcountp = count; 866 867 return 0; 868} 869 870driver_t * 871device_get_driver(device_t dev) 872{ 873 return dev->driver; 874} 875 876devclass_t 877device_get_devclass(device_t dev) 878{ 879 return dev->devclass; 880} 881 882const char * 883device_get_name(device_t dev) 884{ 885 if (dev->devclass) 886 return devclass_get_name(dev->devclass); 887 return NULL; 888} 889 890const char * 891device_get_nameunit(device_t dev) 892{ 893 return dev->nameunit; 894} 895 896int 897device_get_unit(device_t dev) 898{ 899 return dev->unit; 900} 901 902const char * 903device_get_desc(device_t dev) 904{ 905 return dev->desc; 906} 907 908u_int32_t 909device_get_flags(device_t dev) 910{ 911 return dev->devflags; 912} 913 914int 915device_print_prettyname(device_t dev) 916{ 917 const char *name = device_get_name(dev); 918 919 if (name == 0) 920 return printf("unknown: "); 921 else 922 return printf("%s%d: ", name, device_get_unit(dev)); 923} 924 925int 926device_printf(device_t dev, const char * fmt, ...) 927{ 928 va_list ap; 929 int retval; 930 931 retval = device_print_prettyname(dev); 932 va_start(ap, fmt); 933 retval += vprintf(fmt, ap); 934 va_end(ap); 935 return retval; 936} 937 938static void 939device_set_desc_internal(device_t dev, const char* desc, int copy) 940{ 941 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 942 free(dev->desc, M_BUS); 943 dev->flags &= ~DF_DESCMALLOCED; 944 dev->desc = NULL; 945 } 946 947 if (copy && desc) { 948 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT); 949 if (dev->desc) { 950 strcpy(dev->desc, desc); 951 dev->flags |= DF_DESCMALLOCED; 952 } 953 } else 954 /* Avoid a -Wcast-qual warning */ 955 dev->desc = (char *)(uintptr_t) desc; 956 957#ifdef DEVICE_SYSCTLS 958 { 959 struct sysctl_oid *oid = &dev->oid[1]; 960 oid->oid_arg1 = dev->desc ? dev->desc : ""; 961 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 962 } 963#endif 964} 965 966void 967device_set_desc(device_t dev, const char* desc) 968{ 969 device_set_desc_internal(dev, desc, FALSE); 970} 971 972void 973device_set_desc_copy(device_t dev, const char* desc) 974{ 975 device_set_desc_internal(dev, desc, TRUE); 976} 977 978void 979device_set_flags(device_t dev, u_int32_t flags) 980{ 981 dev->devflags = flags; 982} 983 984void * 985device_get_softc(device_t dev) 986{ 987 return dev->softc; 988} 989 990void * 991device_get_ivars(device_t dev) 992{ 993 return dev->ivars; 994} 995 996void 997device_set_ivars(device_t dev, void * ivars) 998{ 999 if (!dev) 1000 return; 1001 1002 dev->ivars = ivars; 1003 1004 return; 1005} 1006 1007device_state_t 1008device_get_state(device_t dev) 1009{ 1010 return dev->state; 1011} 1012 1013void 1014device_enable(device_t dev) 1015{ 1016 dev->flags |= DF_ENABLED; 1017} 1018 1019void 1020device_disable(device_t dev) 1021{ 1022 dev->flags &= ~DF_ENABLED; 1023} 1024 1025void 1026device_busy(device_t dev) 1027{ 1028 if (dev->state < DS_ATTACHED) 1029 panic("device_busy: called for unattached device"); 1030 if (dev->busy == 0 && dev->parent) 1031 device_busy(dev->parent); 1032 dev->busy++; 1033 dev->state = DS_BUSY; 1034} 1035 1036void 1037device_unbusy(device_t dev) 1038{ 1039 if (dev->state != DS_BUSY) 1040 panic("device_unbusy: called for non-busy device"); 1041 dev->busy--; 1042 if (dev->busy == 0) { 1043 if (dev->parent) 1044 device_unbusy(dev->parent); 1045 dev->state = DS_ATTACHED; 1046 } 1047} 1048 1049void 1050device_quiet(device_t dev) 1051{ 1052 dev->flags |= DF_QUIET; 1053} 1054 1055void 1056device_verbose(device_t dev) 1057{ 1058 dev->flags &= ~DF_QUIET; 1059} 1060 1061int 1062device_is_quiet(device_t dev) 1063{ 1064 return (dev->flags & DF_QUIET) != 0; 1065} 1066 1067int 1068device_is_enabled(device_t dev) 1069{ 1070 return (dev->flags & DF_ENABLED) != 0; 1071} 1072 1073int 1074device_is_alive(device_t dev) 1075{ 1076 return dev->state >= DS_ALIVE; 1077} 1078 1079int 1080device_set_devclass(device_t dev, const char *classname) 1081{ 1082 devclass_t dc; 1083 1084 if (!classname) { 1085 if (dev->devclass) 1086 devclass_delete_device(dev->devclass, dev); 1087 return 0; 1088 } 1089 1090 if (dev->devclass) { 1091 printf("device_set_devclass: device class already set\n"); 1092 return EINVAL; 1093 } 1094 1095 dc = devclass_find_internal(classname, TRUE); 1096 if (!dc) 1097 return ENOMEM; 1098 1099 return devclass_add_device(dc, dev); 1100} 1101 1102int 1103device_set_driver(device_t dev, driver_t *driver) 1104{ 1105 if (dev->state >= DS_ATTACHED) 1106 return EBUSY; 1107 1108 if (dev->driver == driver) 1109 return 0; 1110 1111 if (dev->softc) { 1112 free(dev->softc, M_BUS); 1113 dev->softc = NULL; 1114 } 1115 dev->ops = &null_ops; 1116 dev->driver = driver; 1117 if (driver) { 1118 dev->ops = driver->ops; 1119 dev->softc = malloc(driver->softc, M_BUS, M_NOWAIT); 1120 if (!dev->softc) { 1121 dev->ops = &null_ops; 1122 dev->driver = NULL; 1123 return ENOMEM; 1124 } 1125 bzero(dev->softc, driver->softc); 1126 } 1127 return 0; 1128} 1129 1130int 1131device_probe_and_attach(device_t dev) 1132{ 1133 device_t bus = dev->parent; 1134 int error = 0; 1135 1136 if (dev->state >= DS_ALIVE) 1137 return 0; 1138 1139 if (dev->flags & DF_ENABLED) { 1140 error = device_probe_child(bus, dev); 1141 if (!error) { 1142 if (!device_is_quiet(dev)) 1143 device_print_child(bus, dev); 1144 error = DEVICE_ATTACH(dev); 1145 if (!error) 1146 dev->state = DS_ATTACHED; 1147 else { 1148 printf("device_probe_and_attach: %s%d attach returned %d\n", 1149 dev->driver->name, dev->unit, error); 1150 device_set_driver(dev, NULL); 1151 dev->state = DS_NOTPRESENT; 1152 } 1153 } else { 1154 if (!(dev->flags & DF_DONENOMATCH)) { 1155 BUS_PROBE_NOMATCH(bus, dev); 1156 dev->flags |= DF_DONENOMATCH; 1157 } 1158 } 1159 } else { 1160 if (bootverbose) { 1161 device_print_prettyname(dev); 1162 printf("not probed (disabled)\n"); 1163 } 1164 } 1165 1166 return error; 1167} 1168 1169int 1170device_detach(device_t dev) 1171{ 1172 int error; 1173 1174 PDEBUG(("%s", DEVICENAME(dev))); 1175 if (dev->state == DS_BUSY) 1176 return EBUSY; 1177 if (dev->state != DS_ATTACHED) 1178 return 0; 1179 1180 if ((error = DEVICE_DETACH(dev)) != 0) 1181 return error; 1182 if (dev->parent) 1183 BUS_CHILD_DETACHED(dev->parent, dev); 1184 1185 if (!(dev->flags & DF_FIXEDCLASS)) 1186 devclass_delete_device(dev->devclass, dev); 1187 1188 dev->state = DS_NOTPRESENT; 1189 device_set_driver(dev, NULL); 1190 1191 return 0; 1192} 1193 1194int 1195device_shutdown(device_t dev) 1196{ 1197 if (dev->state < DS_ATTACHED) 1198 return 0; 1199 return DEVICE_SHUTDOWN(dev); 1200} 1201 1202#ifdef DEVICE_SYSCTLS 1203 1204/* 1205 * Sysctl nodes for devices. 1206 */ 1207 1208SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1209 1210static int 1211sysctl_handle_children SYSCTL_HANDLER_ARGS 1212{ 1213 device_t dev = arg1; 1214 device_t child; 1215 int first = 1, error = 0; 1216 1217 for (child = TAILQ_FIRST(&dev->children); child; 1218 child = TAILQ_NEXT(child, link)) { 1219 if (child->nameunit) { 1220 if (!first) { 1221 error = SYSCTL_OUT(req, ",", 1); 1222 if (error) return error; 1223 } else { 1224 first = 0; 1225 } 1226 error = SYSCTL_OUT(req, child->nameunit, strlen(child->nameunit)); 1227 if (error) return error; 1228 } 1229 } 1230 1231 error = SYSCTL_OUT(req, "", 1); 1232 1233 return error; 1234} 1235 1236static int 1237sysctl_handle_state SYSCTL_HANDLER_ARGS 1238{ 1239 device_t dev = arg1; 1240 1241 switch (dev->state) { 1242 case DS_NOTPRESENT: 1243 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1244 case DS_ALIVE: 1245 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1246 case DS_ATTACHED: 1247 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1248 case DS_BUSY: 1249 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1250 } 1251 1252 return 0; 1253} 1254 1255static void 1256device_register_oids(device_t dev) 1257{ 1258 struct sysctl_oid* oid; 1259 1260 oid = &dev->oid[0]; 1261 bzero(oid, sizeof(*oid)); 1262 oid->oid_parent = &sysctl__hw_devices_children; 1263 oid->oid_number = OID_AUTO; 1264 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1265 oid->oid_arg1 = &dev->oidlist[0]; 1266 oid->oid_arg2 = 0; 1267 oid->oid_name = dev->nameunit; 1268 oid->oid_handler = 0; 1269 oid->oid_fmt = "N"; 1270 SLIST_INIT(&dev->oidlist[0]); 1271 sysctl_register_oid(oid); 1272 1273 oid = &dev->oid[1]; 1274 bzero(oid, sizeof(*oid)); 1275 oid->oid_parent = &dev->oidlist[0]; 1276 oid->oid_number = OID_AUTO; 1277 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1278 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1279 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1280 oid->oid_name = "desc"; 1281 oid->oid_handler = sysctl_handle_string; 1282 oid->oid_fmt = "A"; 1283 sysctl_register_oid(oid); 1284 1285 oid = &dev->oid[2]; 1286 bzero(oid, sizeof(*oid)); 1287 oid->oid_parent = &dev->oidlist[0]; 1288 oid->oid_number = OID_AUTO; 1289 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1290 oid->oid_arg1 = dev; 1291 oid->oid_arg2 = 0; 1292 oid->oid_name = "children"; 1293 oid->oid_handler = sysctl_handle_children; 1294 oid->oid_fmt = "A"; 1295 sysctl_register_oid(oid); 1296 1297 oid = &dev->oid[3]; 1298 bzero(oid, sizeof(*oid)); 1299 oid->oid_parent = &dev->oidlist[0]; 1300 oid->oid_number = OID_AUTO; 1301 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1302 oid->oid_arg1 = dev; 1303 oid->oid_arg2 = 0; 1304 oid->oid_name = "state"; 1305 oid->oid_handler = sysctl_handle_state; 1306 oid->oid_fmt = "A"; 1307 sysctl_register_oid(oid); 1308} 1309 1310static void 1311device_unregister_oids(device_t dev) 1312{ 1313 sysctl_unregister_oid(&dev->oid[0]); 1314 sysctl_unregister_oid(&dev->oid[1]); 1315 sysctl_unregister_oid(&dev->oid[2]); 1316} 1317 1318#endif 1319 1320/*======================================*/ 1321/* 1322 * Access functions for device resources. 1323 */ 1324 1325/* Supplied by config(8) in ioconf.c */ 1326extern struct config_device config_devtab[]; 1327extern int devtab_count; 1328 1329/* Runtime version */ 1330struct config_device *devtab = config_devtab; 1331 1332static int 1333resource_new_name(const char *name, int unit) 1334{ 1335 struct config_device *new; 1336 1337 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1338 if (new == NULL) 1339 return -1; 1340 if (devtab && devtab_count > 0) 1341 bcopy(devtab, new, devtab_count * sizeof(*new)); 1342 bzero(&new[devtab_count], sizeof(*new)); 1343 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_NOWAIT); 1344 if (new[devtab_count].name == NULL) { 1345 free(new, M_TEMP); 1346 return -1; 1347 } 1348 strcpy(new[devtab_count].name, name); 1349 new[devtab_count].unit = unit; 1350 new[devtab_count].resource_count = 0; 1351 new[devtab_count].resources = NULL; 1352 devtab = new; 1353 return devtab_count++; 1354} 1355 1356static int 1357resource_new_resname(int j, const char *resname, resource_type type) 1358{ 1359 struct config_resource *new; 1360 int i; 1361 1362 i = devtab[j].resource_count; 1363 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1364 if (new == NULL) 1365 return -1; 1366 if (devtab[j].resources && i > 0) 1367 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1368 bzero(&new[i], sizeof(*new)); 1369 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_NOWAIT); 1370 if (new[i].name == NULL) { 1371 free(new, M_TEMP); 1372 return -1; 1373 } 1374 strcpy(new[i].name, resname); 1375 new[i].type = type; 1376 if (devtab[j].resources) 1377 free(devtab[j].resources, M_TEMP); 1378 devtab[j].resources = new; 1379 devtab[j].resource_count = i + 1; 1380 return i; 1381} 1382 1383static int 1384resource_match_string(int i, const char *resname, const char *value) 1385{ 1386 int j; 1387 struct config_resource *res; 1388 1389 for (j = 0, res = devtab[i].resources; 1390 j < devtab[i].resource_count; j++, res++) 1391 if (!strcmp(res->name, resname) 1392 && res->type == RES_STRING 1393 && !strcmp(res->u.stringval, value)) 1394 return j; 1395 return -1; 1396} 1397 1398static int 1399resource_find(const char *name, int unit, const char *resname, 1400 struct config_resource **result) 1401{ 1402 int i, j; 1403 struct config_resource *res; 1404 1405 /* 1406 * First check specific instances, then generic. 1407 */ 1408 for (i = 0; i < devtab_count; i++) { 1409 if (devtab[i].unit < 0) 1410 continue; 1411 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1412 res = devtab[i].resources; 1413 for (j = 0; j < devtab[i].resource_count; j++, res++) 1414 if (!strcmp(res->name, resname)) { 1415 *result = res; 1416 return 0; 1417 } 1418 } 1419 } 1420 for (i = 0; i < devtab_count; i++) { 1421 if (devtab[i].unit >= 0) 1422 continue; 1423 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1424 /* XXX if so, then the generic match does nothing */ 1425 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1426 res = devtab[i].resources; 1427 for (j = 0; j < devtab[i].resource_count; j++, res++) 1428 if (!strcmp(res->name, resname)) { 1429 *result = res; 1430 return 0; 1431 } 1432 } 1433 } 1434 return ENOENT; 1435} 1436 1437int 1438resource_int_value(const char *name, int unit, const char *resname, int *result) 1439{ 1440 int error; 1441 struct config_resource *res; 1442 1443 if ((error = resource_find(name, unit, resname, &res)) != 0) 1444 return error; 1445 if (res->type != RES_INT) 1446 return EFTYPE; 1447 *result = res->u.intval; 1448 return 0; 1449} 1450 1451int 1452resource_long_value(const char *name, int unit, const char *resname, 1453 long *result) 1454{ 1455 int error; 1456 struct config_resource *res; 1457 1458 if ((error = resource_find(name, unit, resname, &res)) != 0) 1459 return error; 1460 if (res->type != RES_LONG) 1461 return EFTYPE; 1462 *result = res->u.longval; 1463 return 0; 1464} 1465 1466int 1467resource_string_value(const char *name, int unit, const char *resname, 1468 char **result) 1469{ 1470 int error; 1471 struct config_resource *res; 1472 1473 if ((error = resource_find(name, unit, resname, &res)) != 0) 1474 return error; 1475 if (res->type != RES_STRING) 1476 return EFTYPE; 1477 *result = res->u.stringval; 1478 return 0; 1479} 1480 1481int 1482resource_query_string(int i, const char *resname, const char *value) 1483{ 1484 if (i < 0) 1485 i = 0; 1486 else 1487 i = i + 1; 1488 for (; i < devtab_count; i++) 1489 if (resource_match_string(i, resname, value) >= 0) 1490 return i; 1491 return -1; 1492} 1493 1494int 1495resource_locate(int i, const char *resname) 1496{ 1497 if (i < 0) 1498 i = 0; 1499 else 1500 i = i + 1; 1501 for (; i < devtab_count; i++) 1502 if (!strcmp(devtab[i].name, resname)) 1503 return i; 1504 return -1; 1505} 1506 1507int 1508resource_count(void) 1509{ 1510 return devtab_count; 1511} 1512 1513char * 1514resource_query_name(int i) 1515{ 1516 return devtab[i].name; 1517} 1518 1519int 1520resource_query_unit(int i) 1521{ 1522 return devtab[i].unit; 1523} 1524 1525static int 1526resource_create(const char *name, int unit, const char *resname, 1527 resource_type type, struct config_resource **result) 1528{ 1529 int i, j; 1530 struct config_resource *res = NULL; 1531 1532 for (i = 0; i < devtab_count; i++) { 1533 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1534 res = devtab[i].resources; 1535 break; 1536 } 1537 } 1538 if (res == NULL) { 1539 i = resource_new_name(name, unit); 1540 if (i < 0) 1541 return ENOMEM; 1542 res = devtab[i].resources; 1543 } 1544 for (j = 0; j < devtab[i].resource_count; j++, res++) { 1545 if (!strcmp(res->name, resname)) { 1546 *result = res; 1547 return 0; 1548 } 1549 } 1550 j = resource_new_resname(i, resname, type); 1551 if (j < 0) 1552 return ENOMEM; 1553 res = &devtab[i].resources[j]; 1554 *result = res; 1555 return 0; 1556} 1557 1558int 1559resource_set_int(const char *name, int unit, const char *resname, int value) 1560{ 1561 int error; 1562 struct config_resource *res; 1563 1564 error = resource_create(name, unit, resname, RES_INT, &res); 1565 if (error) 1566 return error; 1567 if (res->type != RES_INT) 1568 return EFTYPE; 1569 res->u.intval = value; 1570 return 0; 1571} 1572 1573int 1574resource_set_long(const char *name, int unit, const char *resname, long value) 1575{ 1576 int error; 1577 struct config_resource *res; 1578 1579 error = resource_create(name, unit, resname, RES_LONG, &res); 1580 if (error) 1581 return error; 1582 if (res->type != RES_LONG) 1583 return EFTYPE; 1584 res->u.longval = value; 1585 return 0; 1586} 1587 1588int 1589resource_set_string(const char *name, int unit, const char *resname, 1590 const char *value) 1591{ 1592 int error; 1593 struct config_resource *res; 1594 1595 error = resource_create(name, unit, resname, RES_STRING, &res); 1596 if (error) 1597 return error; 1598 if (res->type != RES_STRING) 1599 return EFTYPE; 1600 if (res->u.stringval) 1601 free(res->u.stringval, M_TEMP); 1602 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_NOWAIT); 1603 if (res->u.stringval == NULL) 1604 return ENOMEM; 1605 strcpy(res->u.stringval, value); 1606 return 0; 1607} 1608 1609 1610static void 1611resource_cfgload(void *dummy __unused) 1612{ 1613 struct config_resource *res, *cfgres; 1614 int i, j; 1615 int error; 1616 char *name, *resname; 1617 int unit; 1618 resource_type type; 1619 char *stringval; 1620 int config_devtab_count; 1621 1622 config_devtab_count = devtab_count; 1623 devtab = NULL; 1624 devtab_count = 0; 1625 1626 for (i = 0; i < config_devtab_count; i++) { 1627 name = config_devtab[i].name; 1628 unit = config_devtab[i].unit; 1629 1630 for (j = 0; j < config_devtab[i].resource_count; j++) { 1631 cfgres = config_devtab[i].resources; 1632 resname = cfgres[j].name; 1633 type = cfgres[j].type; 1634 error = resource_create(name, unit, resname, type, 1635 &res); 1636 if (error) { 1637 printf("create resource %s%d: error %d\n", 1638 name, unit, error); 1639 continue; 1640 } 1641 if (res->type != type) { 1642 printf("type mismatch %s%d: %d != %d\n", 1643 name, unit, res->type, type); 1644 continue; 1645 } 1646 switch (type) { 1647 case RES_INT: 1648 res->u.intval = cfgres[j].u.intval; 1649 break; 1650 case RES_LONG: 1651 res->u.longval = cfgres[j].u.longval; 1652 break; 1653 case RES_STRING: 1654 if (res->u.stringval) 1655 free(res->u.stringval, M_TEMP); 1656 stringval = cfgres[j].u.stringval; 1657 res->u.stringval = malloc(strlen(stringval) + 1, 1658 M_TEMP, M_NOWAIT); 1659 if (res->u.stringval == NULL) 1660 break; 1661 strcpy(res->u.stringval, stringval); 1662 break; 1663 default: 1664 panic("unknown resource type %d\n", type); 1665 } 1666 } 1667 } 1668} 1669SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1670 1671 1672/*======================================*/ 1673/* 1674 * Some useful method implementations to make life easier for bus drivers. 1675 */ 1676 1677void 1678resource_list_init(struct resource_list *rl) 1679{ 1680 SLIST_INIT(rl); 1681} 1682 1683void 1684resource_list_free(struct resource_list *rl) 1685{ 1686 struct resource_list_entry *rle; 1687 1688 while ((rle = SLIST_FIRST(rl)) != NULL) { 1689 if (rle->res) 1690 panic("resource_list_free: resource entry is busy"); 1691 SLIST_REMOVE_HEAD(rl, link); 1692 free(rle, M_BUS); 1693 } 1694} 1695 1696void 1697resource_list_add(struct resource_list *rl, 1698 int type, int rid, 1699 u_long start, u_long end, u_long count) 1700{ 1701 struct resource_list_entry *rle; 1702 1703 rle = resource_list_find(rl, type, rid); 1704 if (!rle) { 1705 rle = malloc(sizeof(struct resource_list_entry), M_BUS, M_NOWAIT); 1706 if (!rle) 1707 panic("resource_list_add: can't record entry"); 1708 SLIST_INSERT_HEAD(rl, rle, link); 1709 rle->type = type; 1710 rle->rid = rid; 1711 rle->res = NULL; 1712 } 1713 1714 if (rle->res) 1715 panic("resource_list_add: resource entry is busy"); 1716 1717 rle->start = start; 1718 rle->end = end; 1719 rle->count = count; 1720} 1721 1722struct resource_list_entry* 1723resource_list_find(struct resource_list *rl, 1724 int type, int rid) 1725{ 1726 struct resource_list_entry *rle; 1727 1728 SLIST_FOREACH(rle, rl, link) 1729 if (rle->type == type && rle->rid == rid) 1730 return rle; 1731 return NULL; 1732} 1733 1734void 1735resource_list_delete(struct resource_list *rl, 1736 int type, int rid) 1737{ 1738 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1739 1740 if (rle) { 1741 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1742 free(rle, M_BUS); 1743 } 1744} 1745 1746struct resource * 1747resource_list_alloc(struct resource_list *rl, 1748 device_t bus, device_t child, 1749 int type, int *rid, 1750 u_long start, u_long end, 1751 u_long count, u_int flags) 1752{ 1753 struct resource_list_entry *rle = 0; 1754 int passthrough = (device_get_parent(child) != bus); 1755 int isdefault = (start == 0UL && end == ~0UL); 1756 1757 if (passthrough) { 1758 return BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1759 type, rid, 1760 start, end, count, flags); 1761 } 1762 1763 rle = resource_list_find(rl, type, *rid); 1764 1765 if (!rle) 1766 return 0; /* no resource of that type/rid */ 1767 if (rle->res) 1768 panic("resource_list_alloc: resource entry is busy"); 1769 1770 if (isdefault) { 1771 start = rle->start; 1772 count = max(count, rle->count); 1773 end = max(rle->end, start + count - 1); 1774 } 1775 1776 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1777 type, rid, start, end, count, flags); 1778 1779 /* 1780 * Record the new range. 1781 */ 1782 if (rle->res) { 1783 rle->start = rman_get_start(rle->res); 1784 rle->end = rman_get_end(rle->res); 1785 rle->count = count; 1786 } 1787 1788 return rle->res; 1789} 1790 1791int 1792resource_list_release(struct resource_list *rl, 1793 device_t bus, device_t child, 1794 int type, int rid, struct resource *res) 1795{ 1796 struct resource_list_entry *rle = 0; 1797 int passthrough = (device_get_parent(child) != bus); 1798 int error; 1799 1800 if (passthrough) { 1801 return BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1802 type, rid, res); 1803 } 1804 1805 rle = resource_list_find(rl, type, rid); 1806 1807 if (!rle) 1808 panic("resource_list_release: can't find resource"); 1809 if (!rle->res) 1810 panic("resource_list_release: resource entry is not busy"); 1811 1812 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1813 type, rid, res); 1814 if (error) 1815 return error; 1816 1817 rle->res = NULL; 1818 return 0; 1819} 1820 1821/* 1822 * Call DEVICE_IDENTIFY for each driver. 1823 */ 1824int 1825bus_generic_probe(device_t dev) 1826{ 1827 devclass_t dc = dev->devclass; 1828 driverlink_t dl; 1829 1830 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) 1831 DEVICE_IDENTIFY(dl->driver, dev); 1832 1833 return 0; 1834} 1835 1836int 1837bus_generic_attach(device_t dev) 1838{ 1839 device_t child; 1840 1841 for (child = TAILQ_FIRST(&dev->children); 1842 child; child = TAILQ_NEXT(child, link)) 1843 device_probe_and_attach(child); 1844 1845 return 0; 1846} 1847 1848int 1849bus_generic_detach(device_t dev) 1850{ 1851 device_t child; 1852 int error; 1853 1854 if (dev->state != DS_ATTACHED) 1855 return EBUSY; 1856 1857 for (child = TAILQ_FIRST(&dev->children); 1858 child; child = TAILQ_NEXT(child, link)) 1859 if ((error = device_detach(child)) != 0) 1860 return error; 1861 1862 return 0; 1863} 1864 1865int 1866bus_generic_shutdown(device_t dev) 1867{ 1868 device_t child; 1869 1870 for (child = TAILQ_FIRST(&dev->children); 1871 child; child = TAILQ_NEXT(child, link)) 1872 device_shutdown(child); 1873 1874 return 0; 1875} 1876 1877int 1878bus_generic_suspend(device_t dev) 1879{ 1880 int error; 1881 device_t child, child2; 1882 1883 for (child = TAILQ_FIRST(&dev->children); 1884 child; child = TAILQ_NEXT(child, link)) { 1885 error = DEVICE_SUSPEND(child); 1886 if (error) { 1887 for (child2 = TAILQ_FIRST(&dev->children); 1888 child2 && child2 != child; 1889 child2 = TAILQ_NEXT(child2, link)) 1890 DEVICE_RESUME(child2); 1891 return (error); 1892 } 1893 } 1894 return 0; 1895} 1896 1897int 1898bus_generic_resume(device_t dev) 1899{ 1900 device_t child; 1901 1902 for (child = TAILQ_FIRST(&dev->children); 1903 child; child = TAILQ_NEXT(child, link)) { 1904 DEVICE_RESUME(child); 1905 /* if resume fails, there's nothing we can usefully do... */ 1906 } 1907 return 0; 1908} 1909 1910int 1911bus_print_child_header (device_t dev, device_t child) 1912{ 1913 int retval = 0; 1914 1915 if (device_get_desc(child)) { 1916 retval += device_printf(child, "<%s>", 1917 device_get_desc(child)); 1918 } else { 1919 retval += printf("%s", device_get_nameunit(child)); 1920 } 1921 1922 return (retval); 1923} 1924 1925int 1926bus_print_child_footer (device_t dev, device_t child) 1927{ 1928 return(printf(" on %s\n", device_get_nameunit(dev))); 1929} 1930 1931int 1932bus_generic_print_child(device_t dev, device_t child) 1933{ 1934 int retval = 0; 1935 1936 retval += bus_print_child_header(dev, child); 1937 retval += bus_print_child_footer(dev, child); 1938 1939 return (retval); 1940} 1941 1942int 1943bus_generic_read_ivar(device_t dev, device_t child, int index, 1944 uintptr_t * result) 1945{ 1946 return ENOENT; 1947} 1948 1949int 1950bus_generic_write_ivar(device_t dev, device_t child, int index, 1951 uintptr_t value) 1952{ 1953 return ENOENT; 1954} 1955 1956void 1957bus_generic_driver_added(device_t dev, driver_t *driver) 1958{ 1959 device_t child; 1960 1961 DEVICE_IDENTIFY(driver, dev); 1962 for (child = TAILQ_FIRST(&dev->children); 1963 child; child = TAILQ_NEXT(child, link)) 1964 if (child->state == DS_NOTPRESENT) 1965 device_probe_and_attach(child); 1966} 1967 1968int 1969bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1970 int flags, driver_intr_t *intr, void *arg, 1971 void **cookiep) 1972{ 1973 /* Propagate up the bus hierarchy until someone handles it. */ 1974 if (dev->parent) 1975 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1976 intr, arg, cookiep)); 1977 else 1978 return (EINVAL); 1979} 1980 1981int 1982bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1983 void *cookie) 1984{ 1985 /* Propagate up the bus hierarchy until someone handles it. */ 1986 if (dev->parent) 1987 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1988 else 1989 return (EINVAL); 1990} 1991 1992struct resource * 1993bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1994 u_long start, u_long end, u_long count, u_int flags) 1995{ 1996 /* Propagate up the bus hierarchy until someone handles it. */ 1997 if (dev->parent) 1998 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1999 start, end, count, flags)); 2000 else 2001 return (NULL); 2002} 2003 2004int 2005bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2006 struct resource *r) 2007{ 2008 /* Propagate up the bus hierarchy until someone handles it. */ 2009 if (dev->parent) 2010 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 2011 r)); 2012 else 2013 return (EINVAL); 2014} 2015 2016int 2017bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2018 struct resource *r) 2019{ 2020 /* Propagate up the bus hierarchy until someone handles it. */ 2021 if (dev->parent) 2022 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 2023 r)); 2024 else 2025 return (EINVAL); 2026} 2027 2028int 2029bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2030 int rid, struct resource *r) 2031{ 2032 /* Propagate up the bus hierarchy until someone handles it. */ 2033 if (dev->parent) 2034 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2035 r)); 2036 else 2037 return (EINVAL); 2038} 2039 2040/* 2041 * Some convenience functions to make it easier for drivers to use the 2042 * resource-management functions. All these really do is hide the 2043 * indirection through the parent's method table, making for slightly 2044 * less-wordy code. In the future, it might make sense for this code 2045 * to maintain some sort of a list of resources allocated by each device. 2046 */ 2047struct resource * 2048bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2049 u_long count, u_int flags) 2050{ 2051 if (dev->parent == 0) 2052 return (0); 2053 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2054 count, flags)); 2055} 2056 2057int 2058bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2059{ 2060 if (dev->parent == 0) 2061 return (EINVAL); 2062 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2063} 2064 2065int 2066bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2067{ 2068 if (dev->parent == 0) 2069 return (EINVAL); 2070 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2071} 2072 2073int 2074bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2075{ 2076 if (dev->parent == 0) 2077 return (EINVAL); 2078 return (BUS_RELEASE_RESOURCE(dev->parent, dev, 2079 type, rid, r)); 2080} 2081 2082int 2083bus_setup_intr(device_t dev, struct resource *r, int flags, 2084 driver_intr_t handler, void *arg, void **cookiep) 2085{ 2086 if (dev->parent == 0) 2087 return (EINVAL); 2088 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 2089 handler, arg, cookiep)); 2090} 2091 2092int 2093bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2094{ 2095 if (dev->parent == 0) 2096 return (EINVAL); 2097 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2098} 2099 2100int 2101bus_set_resource(device_t dev, int type, int rid, 2102 u_long start, u_long count) 2103{ 2104 return BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2105 start, count); 2106} 2107 2108int 2109bus_get_resource(device_t dev, int type, int rid, 2110 u_long *startp, u_long *countp) 2111{ 2112 return BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2113 startp, countp); 2114} 2115 2116u_long 2117bus_get_resource_start(device_t dev, int type, int rid) 2118{ 2119 u_long start, count; 2120 int error; 2121 2122 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2123 &start, &count); 2124 if (error) 2125 return 0; 2126 return start; 2127} 2128 2129u_long 2130bus_get_resource_count(device_t dev, int type, int rid) 2131{ 2132 u_long start, count; 2133 int error; 2134 2135 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2136 &start, &count); 2137 if (error) 2138 return 0; 2139 return count; 2140} 2141 2142void 2143bus_delete_resource(device_t dev, int type, int rid) 2144{ 2145 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2146} 2147 2148static int 2149root_print_child(device_t dev, device_t child) 2150{ 2151 return (0); 2152} 2153 2154static int 2155root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2156 void **cookiep) 2157{ 2158 /* 2159 * If an interrupt mapping gets to here something bad has happened. 2160 */ 2161 panic("root_setup_intr"); 2162} 2163 2164static device_method_t root_methods[] = { 2165 /* Device interface */ 2166 DEVMETHOD(device_shutdown, bus_generic_shutdown), 2167 DEVMETHOD(device_suspend, bus_generic_suspend), 2168 DEVMETHOD(device_resume, bus_generic_resume), 2169 2170 /* Bus interface */ 2171 DEVMETHOD(bus_print_child, root_print_child), 2172 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 2173 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), 2174 DEVMETHOD(bus_setup_intr, root_setup_intr), 2175 2176 { 0, 0 } 2177}; 2178 2179static driver_t root_driver = { 2180 "root", 2181 root_methods, 2182 1, /* no softc */ 2183}; 2184 2185device_t root_bus; 2186devclass_t root_devclass; 2187 2188static int 2189root_bus_module_handler(module_t mod, int what, void* arg) 2190{ 2191 switch (what) { 2192 case MOD_LOAD: 2193 compile_methods(&root_driver); 2194 root_bus = make_device(NULL, "root", 0); 2195 root_bus->desc = "System root bus"; 2196 root_bus->ops = root_driver.ops; 2197 root_bus->driver = &root_driver; 2198 root_bus->state = DS_ATTACHED; 2199 root_devclass = devclass_find_internal("root", FALSE); 2200 return 0; 2201 2202 case MOD_SHUTDOWN: 2203 device_shutdown(root_bus); 2204 return 0; 2205 } 2206 2207 return 0; 2208} 2209 2210static moduledata_t root_bus_mod = { 2211 "rootbus", 2212 root_bus_module_handler, 2213 0 2214}; 2215DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2216 2217void 2218root_bus_configure(void) 2219{ 2220 device_t dev; 2221 2222 PDEBUG((".")); 2223 2224 for (dev = TAILQ_FIRST(&root_bus->children); dev; 2225 dev = TAILQ_NEXT(dev, link)) { 2226 device_probe_and_attach(dev); 2227 } 2228} 2229 2230int 2231driver_module_handler(module_t mod, int what, void *arg) 2232{ 2233 int error, i; 2234 struct driver_module_data *dmd; 2235 devclass_t bus_devclass; 2236 2237 dmd = (struct driver_module_data *)arg; 2238 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2239 error = 0; 2240 2241 switch (what) { 2242 case MOD_LOAD: 2243 if (dmd->dmd_chainevh) 2244 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2245 2246 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2247 PDEBUG(("Loading module: driver %s on bus %s", 2248 DRIVERNAME(dmd->dmd_drivers[i]), 2249 dmd->dmd_busname)); 2250 error = devclass_add_driver(bus_devclass, 2251 dmd->dmd_drivers[i]); 2252 } 2253 if (error) 2254 break; 2255 2256 /* 2257 * The drivers loaded in this way are assumed to all 2258 * implement the same devclass. 2259 */ 2260 *dmd->dmd_devclass = 2261 devclass_find_internal(dmd->dmd_drivers[0]->name, 2262 TRUE); 2263 break; 2264 2265 case MOD_UNLOAD: 2266 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2267 PDEBUG(("Unloading module: driver %s from bus %s", 2268 DRIVERNAME(dmd->dmd_drivers[i]), 2269 dmd->dmd_busname)); 2270 error = devclass_delete_driver(bus_devclass, 2271 dmd->dmd_drivers[i]); 2272 } 2273 2274 if (!error && dmd->dmd_chainevh) 2275 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2276 break; 2277 } 2278 2279 return (error); 2280} 2281 2282#ifdef BUS_DEBUG 2283 2284/* the _short versions avoid iteration by not calling anything that prints 2285 * more than oneliners. I love oneliners. 2286 */ 2287 2288static void 2289print_method_list(device_method_t *m, int indent) 2290{ 2291 int i; 2292 2293 if (!m) 2294 return; 2295 2296 for (i = 0; m->desc; i++, m++) 2297 indentprintf(("method %d: %s, offset=%d\n", 2298 i, m->desc->name, m->desc->offset)); 2299} 2300 2301static void 2302print_device_ops(device_ops_t ops, int indent) 2303{ 2304 int i; 2305 int count = 0; 2306 2307 if (!ops) 2308 return; 2309 2310 /* we present a list of the methods that are pointing to the 2311 * error_method, but ignore the 0'th elements; it is always 2312 * error_method. 2313 */ 2314 for (i = 1; i < ops->maxoffset; i++) { 2315 if (ops->methods[i] == error_method) { 2316 if (count == 0) 2317 indentprintf(("error_method:")); 2318 printf(" %d", i); 2319 count++; 2320 } 2321 } 2322 if (count) 2323 printf("\n"); 2324 2325 indentprintf(("(%d method%s, %d valid, %d error_method%s)\n", 2326 ops->maxoffset-1, (ops->maxoffset-1 == 1? "":"s"), 2327 ops->maxoffset-1-count, 2328 count, (count == 1? "":"'s"))); 2329} 2330 2331static void 2332print_device_short(device_t dev, int indent) 2333{ 2334 if (!dev) 2335 return; 2336 2337 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2338 dev->unit, dev->desc, 2339 (dev->parent? "":"no "), 2340 (TAILQ_EMPTY(&dev->children)? "no ":""), 2341 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2342 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2343 (dev->flags&DF_WILDCARD? "wildcard,":""), 2344 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2345 (dev->ivars? "":"no "), 2346 (dev->softc? "":"no "), 2347 dev->busy)); 2348} 2349 2350static void 2351print_device(device_t dev, int indent) 2352{ 2353 if (!dev) 2354 return; 2355 2356 print_device_short(dev, indent); 2357 2358 indentprintf(("Parent:\n")); 2359 print_device_short(dev->parent, indent+1); 2360 indentprintf(("Methods:\n")); 2361 print_device_ops(dev->ops, indent+1); 2362 indentprintf(("Driver:\n")); 2363 print_driver_short(dev->driver, indent+1); 2364 indentprintf(("Devclass:\n")); 2365 print_devclass_short(dev->devclass, indent+1); 2366} 2367 2368void 2369print_device_tree_short(device_t dev, int indent) 2370/* print the device and all its children (indented) */ 2371{ 2372 device_t child; 2373 2374 if (!dev) 2375 return; 2376 2377 print_device_short(dev, indent); 2378 2379 for (child = TAILQ_FIRST(&dev->children); child; 2380 child = TAILQ_NEXT(child, link)) 2381 print_device_tree_short(child, indent+1); 2382} 2383 2384void 2385print_device_tree(device_t dev, int indent) 2386/* print the device and all its children (indented) */ 2387{ 2388 device_t child; 2389 2390 if (!dev) 2391 return; 2392 2393 print_device(dev, indent); 2394 2395 for (child = TAILQ_FIRST(&dev->children); child; 2396 child = TAILQ_NEXT(child, link)) 2397 print_device_tree(child, indent+1); 2398} 2399 2400static void 2401print_driver_short(driver_t *driver, int indent) 2402{ 2403 if (!driver) 2404 return; 2405 2406 indentprintf(("driver %s: softc size = %d\n", 2407 driver->name, driver->softc)); 2408} 2409 2410static void 2411print_driver(driver_t *driver, int indent) 2412{ 2413 if (!driver) 2414 return; 2415 2416 print_driver_short(driver, indent); 2417 indentprintf(("Methods:\n")); 2418 print_method_list(driver->methods, indent+1); 2419 indentprintf(("Operations:\n")); 2420 print_device_ops(driver->ops, indent+1); 2421} 2422 2423 2424static void 2425print_driver_list(driver_list_t drivers, int indent) 2426{ 2427 driverlink_t driver; 2428 2429 for (driver = TAILQ_FIRST(&drivers); driver; 2430 driver = TAILQ_NEXT(driver, link)) 2431 print_driver(driver->driver, indent); 2432} 2433 2434static void 2435print_devclass_short(devclass_t dc, int indent) 2436{ 2437 if ( !dc ) 2438 return; 2439 2440 indentprintf(("devclass %s: max units = %d\n", 2441 dc->name, dc->maxunit)); 2442} 2443 2444static void 2445print_devclass(devclass_t dc, int indent) 2446{ 2447 int i; 2448 2449 if ( !dc ) 2450 return; 2451 2452 print_devclass_short(dc, indent); 2453 indentprintf(("Drivers:\n")); 2454 print_driver_list(dc->drivers, indent+1); 2455 2456 indentprintf(("Devices:\n")); 2457 for (i = 0; i < dc->maxunit; i++) 2458 if (dc->devices[i]) 2459 print_device(dc->devices[i], indent+1); 2460} 2461 2462void 2463print_devclass_list_short(void) 2464{ 2465 devclass_t dc; 2466 2467 printf("Short listing of devclasses, drivers & devices:\n"); 2468 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2469 print_devclass_short(dc, 0); 2470} 2471 2472void 2473print_devclass_list(void) 2474{ 2475 devclass_t dc; 2476 2477 printf("Full listing of devclasses, drivers & devices:\n"); 2478 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2479 print_devclass(dc, 0); 2480} 2481 2482#endif 2483