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 1.16 2004/04/01 08:41:24 joerg 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 #ifdef DEVICE_SYSCTLS 38 #include <sys/sysctl.h> 39 #endif 40 #include <sys/kobj.h> 41 #include <sys/bus_private.h> 42 #include <sys/systm.h> 43 #include <machine/bus.h> 44 #include <sys/rman.h> 45 #include <machine/stdarg.h> /* for device_printf() */ 46 47 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 48 49 #ifdef BUS_DEBUG 50 #define PDEBUG(a) (printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n")) 51 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 52 #define DRIVERNAME(d) ((d)? d->name : "no driver") 53 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 54 55 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 56 * prevent syslog from deleting initial spaces 57 */ 58 #define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while(0) 59 60 static void print_device_short(device_t dev, int indent); 61 static void print_device(device_t dev, int indent); 62 void print_device_tree_short(device_t dev, int indent); 63 void print_device_tree(device_t dev, int indent); 64 static void print_driver_short(driver_t *driver, int indent); 65 static void print_driver(driver_t *driver, int indent); 66 static void print_driver_list(driver_list_t drivers, int indent); 67 static void print_devclass_short(devclass_t dc, int indent); 68 static void print_devclass(devclass_t dc, int indent); 69 void print_devclass_list_short(void); 70 void 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_device_short(d,i) /* nop */ 80 #define print_device(d,i) /* nop */ 81 #define print_device_tree_short(d,i) /* nop */ 82 #define print_device_tree(d,i) /* nop */ 83 #define print_driver_short(d,i) /* nop */ 84 #define print_driver(d,i) /* nop */ 85 #define print_driver_list(d,i) /* nop */ 86 #define print_devclass_short(d,i) /* nop */ 87 #define print_devclass(d,i) /* nop */ 88 #define print_devclass_list_short() /* nop */ 89 #define print_devclass_list() /* nop */ 90 #endif 91 92 #ifdef DEVICE_SYSCTLS 93 static void device_register_oids(device_t dev); 94 static void device_unregister_oids(device_t dev); 95 #endif 96 97 kobj_method_t null_methods[] = { 98 { 0, 0 } 99 }; 100 101 DEFINE_CLASS(null, null_methods, 0); 102 103 /* 104 * Devclass implementation 105 */ 106 107 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 108 109 static devclass_t 110 devclass_find_internal(const char *classname, int create) 111 { 112 devclass_t dc; 113 114 PDEBUG(("looking for %s", classname)); 115 if (classname == NULL) 116 return(NULL); 117 118 TAILQ_FOREACH(dc, &devclasses, link) 119 if (!strcmp(dc->name, classname)) 120 return(dc); 121 122 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 123 if (create) { 124 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 125 M_BUS, M_INTWAIT | M_ZERO); 126 if (!dc) 127 return NULL; 128 dc->name = (char*) (dc + 1); 129 strcpy(dc->name, classname); 130 dc->devices = NULL; 131 dc->maxunit = 0; 132 TAILQ_INIT(&dc->drivers); 133 TAILQ_INSERT_TAIL(&devclasses, dc, link); 134 } 135 136 return(dc); 137 } 138 139 devclass_t 140 devclass_create(const char *classname) 141 { 142 return(devclass_find_internal(classname, TRUE)); 143 } 144 145 devclass_t 146 devclass_find(const char *classname) 147 { 148 return(devclass_find_internal(classname, FALSE)); 149 } 150 151 int 152 devclass_add_driver(devclass_t dc, driver_t *driver) 153 { 154 driverlink_t dl; 155 int i; 156 157 PDEBUG(("%s", DRIVERNAME(driver))); 158 159 dl = malloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 160 if (!dl) 161 return(ENOMEM); 162 163 /* 164 * Compile the driver's methods. Also increase the reference count 165 * so that the class doesn't get freed when the last instance 166 * goes. This means we can safely use static methods and avoids a 167 * double-free in devclass_delete_driver. 168 */ 169 kobj_class_instantiate(driver); 170 171 /* 172 * Make sure the devclass which the driver is implementing exists. 173 */ 174 devclass_find_internal(driver->name, TRUE); 175 176 dl->driver = driver; 177 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 178 179 /* 180 * Call BUS_DRIVER_ADDED for any existing busses in this class. 181 */ 182 for (i = 0; i < dc->maxunit; i++) 183 if (dc->devices[i]) 184 BUS_DRIVER_ADDED(dc->devices[i], driver); 185 186 return(0); 187 } 188 189 int 190 devclass_delete_driver(devclass_t busclass, driver_t *driver) 191 { 192 devclass_t dc = devclass_find(driver->name); 193 driverlink_t dl; 194 device_t dev; 195 int i; 196 int error; 197 198 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 199 200 if (!dc) 201 return(0); 202 203 /* 204 * Find the link structure in the bus' list of drivers. 205 */ 206 TAILQ_FOREACH(dl, &busclass->drivers, link) 207 if (dl->driver == driver) 208 break; 209 210 if (!dl) { 211 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 212 return(ENOENT); 213 } 214 215 /* 216 * Disassociate from any devices. We iterate through all the 217 * devices in the devclass of the driver and detach any which are 218 * using the driver and which have a parent in the devclass which 219 * we are deleting from. 220 * 221 * Note that since a driver can be in multiple devclasses, we 222 * should not detach devices which are not children of devices in 223 * the affected devclass. 224 */ 225 for (i = 0; i < dc->maxunit; i++) 226 if (dc->devices[i]) { 227 dev = dc->devices[i]; 228 if (dev->driver == driver && dev->parent && 229 dev->parent->devclass == busclass) { 230 if ((error = device_detach(dev)) != 0) 231 return(error); 232 device_set_driver(dev, NULL); 233 } 234 } 235 236 TAILQ_REMOVE(&busclass->drivers, dl, link); 237 free(dl, M_BUS); 238 239 kobj_class_uninstantiate(driver); 240 241 return(0); 242 } 243 244 static driverlink_t 245 devclass_find_driver_internal(devclass_t dc, const char *classname) 246 { 247 driverlink_t dl; 248 249 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 250 251 TAILQ_FOREACH(dl, &dc->drivers, link) 252 if (!strcmp(dl->driver->name, classname)) 253 return(dl); 254 255 PDEBUG(("not found")); 256 return(NULL); 257 } 258 259 driver_t * 260 devclass_find_driver(devclass_t dc, const char *classname) 261 { 262 driverlink_t dl; 263 264 dl = devclass_find_driver_internal(dc, classname); 265 if (dl) 266 return(dl->driver); 267 else 268 return(NULL); 269 } 270 271 const char * 272 devclass_get_name(devclass_t dc) 273 { 274 return(dc->name); 275 } 276 277 device_t 278 devclass_get_device(devclass_t dc, int unit) 279 { 280 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 281 return(NULL); 282 return(dc->devices[unit]); 283 } 284 285 void * 286 devclass_get_softc(devclass_t dc, int unit) 287 { 288 device_t dev; 289 290 dev = devclass_get_device(dc, unit); 291 if (!dev) 292 return(NULL); 293 294 return(device_get_softc(dev)); 295 } 296 297 int 298 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 299 { 300 int i; 301 int count; 302 device_t *list; 303 304 count = 0; 305 for (i = 0; i < dc->maxunit; i++) 306 if (dc->devices[i]) 307 count++; 308 309 list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 310 if (list == NULL) 311 return(ENOMEM); 312 313 count = 0; 314 for (i = 0; i < dc->maxunit; i++) 315 if (dc->devices[i]) { 316 list[count] = dc->devices[i]; 317 count++; 318 } 319 320 *devlistp = list; 321 *devcountp = count; 322 323 return(0); 324 } 325 326 int 327 devclass_get_maxunit(devclass_t dc) 328 { 329 return(dc->maxunit); 330 } 331 332 static int 333 devclass_alloc_unit(devclass_t dc, int *unitp) 334 { 335 int unit = *unitp; 336 337 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 338 339 /* If we have been given a wired unit number, check for existing device */ 340 if (unit != -1) { 341 if (unit >= 0 && unit < dc->maxunit && 342 dc->devices[unit] != NULL) { 343 if (bootverbose) 344 printf("%s-: %s%d exists, using next available unit number\n", 345 dc->name, dc->name, unit); 346 /* find the next available slot */ 347 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 348 ; 349 } 350 } else { 351 /* Unwired device, find the next available slot for it */ 352 unit = 0; 353 while (unit < dc->maxunit && dc->devices[unit] != NULL) 354 unit++; 355 } 356 357 /* 358 * We've selected a unit beyond the length of the table, so let's 359 * extend the table to make room for all units up to and including 360 * this one. 361 */ 362 if (unit >= dc->maxunit) { 363 device_t *newlist; 364 int newsize; 365 366 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 367 newlist = malloc(sizeof(device_t) * newsize, M_BUS, 368 M_INTWAIT | M_ZERO); 369 if (newlist == NULL) 370 return(ENOMEM); 371 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 372 if (dc->devices) 373 free(dc->devices, M_BUS); 374 dc->devices = newlist; 375 dc->maxunit = newsize; 376 } 377 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 378 379 *unitp = unit; 380 return(0); 381 } 382 383 static int 384 devclass_add_device(devclass_t dc, device_t dev) 385 { 386 int buflen, error; 387 388 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 389 390 buflen = strlen(dc->name) + 5; 391 dev->nameunit = malloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 392 if (!dev->nameunit) 393 return(ENOMEM); 394 395 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 396 free(dev->nameunit, M_BUS); 397 dev->nameunit = NULL; 398 return(error); 399 } 400 dc->devices[dev->unit] = dev; 401 dev->devclass = dc; 402 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 403 404 #ifdef DEVICE_SYSCTLS 405 device_register_oids(dev); 406 #endif 407 408 return(0); 409 } 410 411 static int 412 devclass_delete_device(devclass_t dc, device_t dev) 413 { 414 if (!dc || !dev) 415 return(0); 416 417 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 418 419 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 420 panic("devclass_delete_device: inconsistent device class"); 421 dc->devices[dev->unit] = NULL; 422 if (dev->flags & DF_WILDCARD) 423 dev->unit = -1; 424 dev->devclass = NULL; 425 free(dev->nameunit, M_BUS); 426 dev->nameunit = NULL; 427 428 #ifdef DEVICE_SYSCTLS 429 device_unregister_oids(dev); 430 #endif 431 432 return(0); 433 } 434 435 static device_t 436 make_device(device_t parent, const char *name, int unit) 437 { 438 device_t dev; 439 devclass_t dc; 440 441 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 442 443 if (name != NULL) { 444 dc = devclass_find_internal(name, TRUE); 445 if (!dc) { 446 printf("make_device: can't find device class %s\n", name); 447 return(NULL); 448 } 449 } else 450 dc = NULL; 451 452 dev = malloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); 453 if (!dev) 454 return(0); 455 456 dev->parent = parent; 457 TAILQ_INIT(&dev->children); 458 kobj_init((kobj_t) dev, &null_class); 459 dev->driver = NULL; 460 dev->devclass = NULL; 461 dev->unit = unit; 462 dev->nameunit = NULL; 463 dev->desc = NULL; 464 dev->busy = 0; 465 dev->devflags = 0; 466 dev->flags = DF_ENABLED; 467 dev->order = 0; 468 if (unit == -1) 469 dev->flags |= DF_WILDCARD; 470 if (name) { 471 dev->flags |= DF_FIXEDCLASS; 472 if (devclass_add_device(dc, dev) != 0) { 473 kobj_delete((kobj_t)dev, M_BUS); 474 return(NULL); 475 } 476 } 477 dev->ivars = NULL; 478 dev->softc = NULL; 479 480 dev->state = DS_NOTPRESENT; 481 482 return(dev); 483 } 484 485 static int 486 device_print_child(device_t dev, device_t child) 487 { 488 int retval = 0; 489 490 if (device_is_alive(child)) 491 retval += BUS_PRINT_CHILD(dev, child); 492 else 493 retval += device_printf(child, " not found\n"); 494 495 return(retval); 496 } 497 498 device_t 499 device_add_child(device_t dev, const char *name, int unit) 500 { 501 return device_add_child_ordered(dev, 0, name, unit); 502 } 503 504 device_t 505 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 506 { 507 device_t child; 508 device_t place; 509 510 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 511 order, unit)); 512 513 child = make_device(dev, name, unit); 514 if (child == NULL) 515 return child; 516 child->order = order; 517 518 TAILQ_FOREACH(place, &dev->children, link) 519 if (place->order > order) 520 break; 521 522 if (place) { 523 /* 524 * The device 'place' is the first device whose order is 525 * greater than the new child. 526 */ 527 TAILQ_INSERT_BEFORE(place, child, link); 528 } else { 529 /* 530 * The new child's order is greater or equal to the order of 531 * any existing device. Add the child to the tail of the list. 532 */ 533 TAILQ_INSERT_TAIL(&dev->children, child, link); 534 } 535 536 return(child); 537 } 538 539 int 540 device_delete_child(device_t dev, device_t child) 541 { 542 int error; 543 device_t grandchild; 544 545 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 546 547 /* remove children first */ 548 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 549 error = device_delete_child(child, grandchild); 550 if (error) 551 return(error); 552 } 553 554 if ((error = device_detach(child)) != 0) 555 return(error); 556 if (child->devclass) 557 devclass_delete_device(child->devclass, child); 558 TAILQ_REMOVE(&dev->children, child, link); 559 device_set_desc(child, NULL); 560 kobj_delete((kobj_t)child, M_BUS); 561 562 return(0); 563 } 564 565 /* 566 * Find only devices attached to this bus. 567 */ 568 device_t 569 device_find_child(device_t dev, const char *classname, int unit) 570 { 571 devclass_t dc; 572 device_t child; 573 574 dc = devclass_find(classname); 575 if (!dc) 576 return(NULL); 577 578 child = devclass_get_device(dc, unit); 579 if (child && child->parent == dev) 580 return(child); 581 return(NULL); 582 } 583 584 static driverlink_t 585 first_matching_driver(devclass_t dc, device_t dev) 586 { 587 if (dev->devclass) 588 return(devclass_find_driver_internal(dc, dev->devclass->name)); 589 else 590 return(TAILQ_FIRST(&dc->drivers)); 591 } 592 593 static driverlink_t 594 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 595 { 596 if (dev->devclass) { 597 driverlink_t dl; 598 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 599 if (!strcmp(dev->devclass->name, dl->driver->name)) 600 return(dl); 601 return(NULL); 602 } else 603 return(TAILQ_NEXT(last, link)); 604 } 605 606 static int 607 device_probe_child(device_t dev, device_t child) 608 { 609 devclass_t dc; 610 driverlink_t best = 0; 611 driverlink_t dl; 612 int result, pri = 0; 613 int hasclass = (child->devclass != 0); 614 615 dc = dev->devclass; 616 if (!dc) 617 panic("device_probe_child: parent device has no devclass"); 618 619 if (child->state == DS_ALIVE) 620 return(0); 621 622 for (dl = first_matching_driver(dc, child); dl; 623 dl = next_matching_driver(dc, child, dl)) { 624 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 625 device_set_driver(child, dl->driver); 626 if (!hasclass) 627 device_set_devclass(child, dl->driver->name); 628 result = DEVICE_PROBE(child); 629 if (!hasclass) 630 device_set_devclass(child, 0); 631 632 /* 633 * If the driver returns SUCCESS, there can be no higher match 634 * for this device. 635 */ 636 if (result == 0) { 637 best = dl; 638 pri = 0; 639 break; 640 } 641 642 /* 643 * The driver returned an error so it certainly doesn't match. 644 */ 645 if (result > 0) { 646 device_set_driver(child, 0); 647 continue; 648 } 649 650 /* 651 * A priority lower than SUCCESS, remember the best matching 652 * driver. Initialise the value of pri for the first match. 653 */ 654 if (best == 0 || result > pri) { 655 best = dl; 656 pri = result; 657 continue; 658 } 659 } 660 661 /* 662 * If we found a driver, change state and initialise the devclass. 663 */ 664 if (best) { 665 if (!child->devclass) 666 device_set_devclass(child, best->driver->name); 667 device_set_driver(child, best->driver); 668 if (pri < 0) { 669 /* 670 * A bit bogus. Call the probe method again to make 671 * sure that we have the right description. 672 */ 673 DEVICE_PROBE(child); 674 } 675 child->state = DS_ALIVE; 676 return(0); 677 } 678 679 return(ENXIO); 680 } 681 682 device_t 683 device_get_parent(device_t dev) 684 { 685 return dev->parent; 686 } 687 688 int 689 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 690 { 691 int count; 692 device_t child; 693 device_t *list; 694 695 count = 0; 696 TAILQ_FOREACH(child, &dev->children, link) 697 count++; 698 699 list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 700 if (!list) 701 return(ENOMEM); 702 703 count = 0; 704 TAILQ_FOREACH(child, &dev->children, link) { 705 list[count] = child; 706 count++; 707 } 708 709 *devlistp = list; 710 *devcountp = count; 711 712 return(0); 713 } 714 715 driver_t * 716 device_get_driver(device_t dev) 717 { 718 return(dev->driver); 719 } 720 721 devclass_t 722 device_get_devclass(device_t dev) 723 { 724 return(dev->devclass); 725 } 726 727 const char * 728 device_get_name(device_t dev) 729 { 730 if (dev->devclass) 731 return devclass_get_name(dev->devclass); 732 return(NULL); 733 } 734 735 const char * 736 device_get_nameunit(device_t dev) 737 { 738 return(dev->nameunit); 739 } 740 741 int 742 device_get_unit(device_t dev) 743 { 744 return(dev->unit); 745 } 746 747 const char * 748 device_get_desc(device_t dev) 749 { 750 return(dev->desc); 751 } 752 753 uint32_t 754 device_get_flags(device_t dev) 755 { 756 return(dev->devflags); 757 } 758 759 int 760 device_print_prettyname(device_t dev) 761 { 762 const char *name = device_get_name(dev); 763 764 if (name == 0) 765 return printf("unknown: "); 766 else 767 return printf("%s%d: ", name, device_get_unit(dev)); 768 } 769 770 int 771 device_printf(device_t dev, const char * fmt, ...) 772 { 773 __va_list ap; 774 int retval; 775 776 retval = device_print_prettyname(dev); 777 __va_start(ap, fmt); 778 retval += vprintf(fmt, ap); 779 __va_end(ap); 780 return retval; 781 } 782 783 static void 784 device_set_desc_internal(device_t dev, const char* desc, int copy) 785 { 786 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 787 free(dev->desc, M_BUS); 788 dev->flags &= ~DF_DESCMALLOCED; 789 dev->desc = NULL; 790 } 791 792 if (copy && desc) { 793 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 794 if (dev->desc) { 795 strcpy(dev->desc, desc); 796 dev->flags |= DF_DESCMALLOCED; 797 } 798 } else 799 /* Avoid a -Wcast-qual warning */ 800 dev->desc = (char *)(uintptr_t) desc; 801 802 #ifdef DEVICE_SYSCTLS 803 { 804 struct sysctl_oid *oid = &dev->oid[1]; 805 oid->oid_arg1 = dev->desc ? dev->desc : ""; 806 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 807 } 808 #endif 809 } 810 811 void 812 device_set_desc(device_t dev, const char* desc) 813 { 814 device_set_desc_internal(dev, desc, FALSE); 815 } 816 817 void 818 device_set_desc_copy(device_t dev, const char* desc) 819 { 820 device_set_desc_internal(dev, desc, TRUE); 821 } 822 823 void 824 device_set_flags(device_t dev, uint32_t flags) 825 { 826 dev->devflags = flags; 827 } 828 829 void * 830 device_get_softc(device_t dev) 831 { 832 return dev->softc; 833 } 834 835 void 836 device_set_softc(device_t dev, void *softc) 837 { 838 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 839 free(dev->softc, M_BUS); 840 dev->softc = softc; 841 if (dev->softc) 842 dev->flags |= DF_EXTERNALSOFTC; 843 else 844 dev->flags &= ~DF_EXTERNALSOFTC; 845 } 846 847 void * 848 device_get_ivars(device_t dev) 849 { 850 return dev->ivars; 851 } 852 853 void 854 device_set_ivars(device_t dev, void * ivars) 855 { 856 if (!dev) 857 return; 858 859 dev->ivars = ivars; 860 } 861 862 device_state_t 863 device_get_state(device_t dev) 864 { 865 return(dev->state); 866 } 867 868 void 869 device_enable(device_t dev) 870 { 871 dev->flags |= DF_ENABLED; 872 } 873 874 void 875 device_disable(device_t dev) 876 { 877 dev->flags &= ~DF_ENABLED; 878 } 879 880 /* 881 * YYY cannot block 882 */ 883 void 884 device_busy(device_t dev) 885 { 886 if (dev->state < DS_ATTACHED) 887 panic("device_busy: called for unattached device"); 888 if (dev->busy == 0 && dev->parent) 889 device_busy(dev->parent); 890 dev->busy++; 891 dev->state = DS_BUSY; 892 } 893 894 /* 895 * YYY cannot block 896 */ 897 void 898 device_unbusy(device_t dev) 899 { 900 if (dev->state != DS_BUSY) 901 panic("device_unbusy: called for non-busy device"); 902 dev->busy--; 903 if (dev->busy == 0) { 904 if (dev->parent) 905 device_unbusy(dev->parent); 906 dev->state = DS_ATTACHED; 907 } 908 } 909 910 void 911 device_quiet(device_t dev) 912 { 913 dev->flags |= DF_QUIET; 914 } 915 916 void 917 device_verbose(device_t dev) 918 { 919 dev->flags &= ~DF_QUIET; 920 } 921 922 int 923 device_is_quiet(device_t dev) 924 { 925 return((dev->flags & DF_QUIET) != 0); 926 } 927 928 int 929 device_is_enabled(device_t dev) 930 { 931 return((dev->flags & DF_ENABLED) != 0); 932 } 933 934 int 935 device_is_alive(device_t dev) 936 { 937 return(dev->state >= DS_ALIVE); 938 } 939 940 int 941 device_is_attached(device_t dev) 942 { 943 return(dev->state >= DS_ATTACHED); 944 } 945 946 int 947 device_set_devclass(device_t dev, const char *classname) 948 { 949 devclass_t dc; 950 951 if (!classname) { 952 if (dev->devclass) 953 devclass_delete_device(dev->devclass, dev); 954 return(0); 955 } 956 957 if (dev->devclass) { 958 printf("device_set_devclass: device class already set\n"); 959 return(EINVAL); 960 } 961 962 dc = devclass_find_internal(classname, TRUE); 963 if (!dc) 964 return(ENOMEM); 965 966 return(devclass_add_device(dc, dev)); 967 } 968 969 int 970 device_set_driver(device_t dev, driver_t *driver) 971 { 972 if (dev->state >= DS_ATTACHED) 973 return(EBUSY); 974 975 if (dev->driver == driver) 976 return(0); 977 978 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 979 free(dev->softc, M_BUS); 980 dev->softc = NULL; 981 } 982 kobj_delete((kobj_t) dev, 0); 983 dev->driver = driver; 984 if (driver) { 985 kobj_init((kobj_t) dev, (kobj_class_t) driver); 986 if (!(dev->flags & DF_EXTERNALSOFTC)) { 987 dev->softc = malloc(driver->size, M_BUS, 988 M_INTWAIT | M_ZERO); 989 if (!dev->softc) { 990 kobj_delete((kobj_t)dev, 0); 991 kobj_init((kobj_t) dev, &null_class); 992 dev->driver = NULL; 993 return(ENOMEM); 994 } 995 } 996 } else 997 kobj_init((kobj_t) dev, &null_class); 998 return(0); 999 } 1000 1001 int 1002 device_probe_and_attach(device_t dev) 1003 { 1004 device_t bus = dev->parent; 1005 int error = 0; 1006 int hasclass = (dev->devclass != 0); 1007 1008 if (dev->state >= DS_ALIVE) 1009 return(0); 1010 1011 if ((dev->flags & DF_ENABLED) == 0) { 1012 if (bootverbose) { 1013 device_print_prettyname(dev); 1014 printf("not probed (disabled)\n"); 1015 } 1016 return(0); 1017 } 1018 1019 error = device_probe_child(bus, dev); 1020 if (error) { 1021 if (!(dev->flags & DF_DONENOMATCH)) { 1022 BUS_PROBE_NOMATCH(bus, dev); 1023 dev->flags |= DF_DONENOMATCH; 1024 } 1025 return(error); 1026 } 1027 1028 if (!device_is_quiet(dev)) 1029 device_print_child(bus, dev); 1030 error = DEVICE_ATTACH(dev); 1031 if (!error) 1032 dev->state = DS_ATTACHED; 1033 else { 1034 printf("device_probe_and_attach: %s%d attach returned %d\n", 1035 dev->driver->name, dev->unit, error); 1036 /* Unset the class that was set in device_probe_child */ 1037 if (!hasclass) 1038 device_set_devclass(dev, 0); 1039 device_set_driver(dev, NULL); 1040 dev->state = DS_NOTPRESENT; 1041 } 1042 1043 return(error); 1044 } 1045 1046 int 1047 device_detach(device_t dev) 1048 { 1049 int error; 1050 1051 PDEBUG(("%s", DEVICENAME(dev))); 1052 if (dev->state == DS_BUSY) 1053 return(EBUSY); 1054 if (dev->state != DS_ATTACHED) 1055 return(0); 1056 1057 if ((error = DEVICE_DETACH(dev)) != 0) 1058 return(error); 1059 device_printf(dev, "detached\n"); 1060 if (dev->parent) 1061 BUS_CHILD_DETACHED(dev->parent, dev); 1062 1063 if (!(dev->flags & DF_FIXEDCLASS)) 1064 devclass_delete_device(dev->devclass, dev); 1065 1066 dev->state = DS_NOTPRESENT; 1067 device_set_driver(dev, NULL); 1068 1069 return(0); 1070 } 1071 1072 int 1073 device_shutdown(device_t dev) 1074 { 1075 if (dev->state < DS_ATTACHED) 1076 return 0; 1077 return DEVICE_SHUTDOWN(dev); 1078 } 1079 1080 int 1081 device_set_unit(device_t dev, int unit) 1082 { 1083 devclass_t dc; 1084 int err; 1085 1086 dc = device_get_devclass(dev); 1087 if (unit < dc->maxunit && dc->devices[unit]) 1088 return(EBUSY); 1089 err = devclass_delete_device(dc, dev); 1090 if (err) 1091 return(err); 1092 dev->unit = unit; 1093 err = devclass_add_device(dc, dev); 1094 return(err); 1095 } 1096 1097 #ifdef DEVICE_SYSCTLS 1098 1099 /* 1100 * Sysctl nodes for devices. 1101 */ 1102 1103 SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1104 1105 static int 1106 sysctl_handle_children(SYSCTL_HANDLER_ARGS) 1107 { 1108 device_t dev = arg1; 1109 device_t child; 1110 int first = 1, error = 0; 1111 1112 TAILQ_FOREACH(child, &dev->children, link) 1113 if (child->nameunit) { 1114 if (!first) { 1115 error = SYSCTL_OUT(req, ",", 1); 1116 if (error) 1117 return error; 1118 } else 1119 first = 0; 1120 error = SYSCTL_OUT(req, child->nameunit, 1121 strlen(child->nameunit)); 1122 if (error) 1123 return(error); 1124 } 1125 1126 error = SYSCTL_OUT(req, "", 1); 1127 1128 return(error); 1129 } 1130 1131 static int 1132 sysctl_handle_state(SYSCTL_HANDLER_ARGS) 1133 { 1134 device_t dev = arg1; 1135 1136 switch (dev->state) { 1137 case DS_NOTPRESENT: 1138 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1139 case DS_ALIVE: 1140 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1141 case DS_ATTACHED: 1142 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1143 case DS_BUSY: 1144 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1145 default: 1146 return (0); 1147 } 1148 } 1149 1150 static void 1151 device_register_oids(device_t dev) 1152 { 1153 struct sysctl_oid* oid; 1154 1155 oid = &dev->oid[0]; 1156 bzero(oid, sizeof(*oid)); 1157 oid->oid_parent = &sysctl__hw_devices_children; 1158 oid->oid_number = OID_AUTO; 1159 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1160 oid->oid_arg1 = &dev->oidlist[0]; 1161 oid->oid_arg2 = 0; 1162 oid->oid_name = dev->nameunit; 1163 oid->oid_handler = 0; 1164 oid->oid_fmt = "N"; 1165 SLIST_INIT(&dev->oidlist[0]); 1166 sysctl_register_oid(oid); 1167 1168 oid = &dev->oid[1]; 1169 bzero(oid, sizeof(*oid)); 1170 oid->oid_parent = &dev->oidlist[0]; 1171 oid->oid_number = OID_AUTO; 1172 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1173 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1174 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1175 oid->oid_name = "desc"; 1176 oid->oid_handler = sysctl_handle_string; 1177 oid->oid_fmt = "A"; 1178 sysctl_register_oid(oid); 1179 1180 oid = &dev->oid[2]; 1181 bzero(oid, sizeof(*oid)); 1182 oid->oid_parent = &dev->oidlist[0]; 1183 oid->oid_number = OID_AUTO; 1184 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1185 oid->oid_arg1 = dev; 1186 oid->oid_arg2 = 0; 1187 oid->oid_name = "children"; 1188 oid->oid_handler = sysctl_handle_children; 1189 oid->oid_fmt = "A"; 1190 sysctl_register_oid(oid); 1191 1192 oid = &dev->oid[3]; 1193 bzero(oid, sizeof(*oid)); 1194 oid->oid_parent = &dev->oidlist[0]; 1195 oid->oid_number = OID_AUTO; 1196 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1197 oid->oid_arg1 = dev; 1198 oid->oid_arg2 = 0; 1199 oid->oid_name = "state"; 1200 oid->oid_handler = sysctl_handle_state; 1201 oid->oid_fmt = "A"; 1202 sysctl_register_oid(oid); 1203 } 1204 1205 static void 1206 device_unregister_oids(device_t dev) 1207 { 1208 sysctl_unregister_oid(&dev->oid[0]); 1209 sysctl_unregister_oid(&dev->oid[1]); 1210 sysctl_unregister_oid(&dev->oid[2]); 1211 } 1212 1213 #endif 1214 1215 /*======================================*/ 1216 /* 1217 * Access functions for device resources. 1218 */ 1219 1220 /* Supplied by config(8) in ioconf.c */ 1221 extern struct config_device config_devtab[]; 1222 extern int devtab_count; 1223 1224 /* Runtime version */ 1225 struct config_device *devtab = config_devtab; 1226 1227 static int 1228 resource_new_name(const char *name, int unit) 1229 { 1230 struct config_device *new; 1231 1232 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, 1233 M_INTWAIT | M_ZERO); 1234 if (new == NULL) 1235 return(-1); 1236 if (devtab && devtab_count > 0) 1237 bcopy(devtab, new, devtab_count * sizeof(*new)); 1238 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 1239 if (new[devtab_count].name == NULL) { 1240 free(new, M_TEMP); 1241 return(-1); 1242 } 1243 strcpy(new[devtab_count].name, name); 1244 new[devtab_count].unit = unit; 1245 new[devtab_count].resource_count = 0; 1246 new[devtab_count].resources = NULL; 1247 devtab = new; 1248 return devtab_count++; 1249 } 1250 1251 static int 1252 resource_new_resname(int j, const char *resname, resource_type type) 1253 { 1254 struct config_resource *new; 1255 int i; 1256 1257 i = devtab[j].resource_count; 1258 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 1259 if (new == NULL) 1260 return(-1); 1261 if (devtab[j].resources && i > 0) 1262 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1263 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 1264 if (new[i].name == NULL) { 1265 free(new, M_TEMP); 1266 return(-1); 1267 } 1268 strcpy(new[i].name, resname); 1269 new[i].type = type; 1270 if (devtab[j].resources) 1271 free(devtab[j].resources, M_TEMP); 1272 devtab[j].resources = new; 1273 devtab[j].resource_count = i + 1; 1274 return(i); 1275 } 1276 1277 static int 1278 resource_match_string(int i, const char *resname, const char *value) 1279 { 1280 int j; 1281 struct config_resource *res; 1282 1283 for (j = 0, res = devtab[i].resources; 1284 j < devtab[i].resource_count; j++, res++) 1285 if (!strcmp(res->name, resname) 1286 && res->type == RES_STRING 1287 && !strcmp(res->u.stringval, value)) 1288 return(j); 1289 return(-1); 1290 } 1291 1292 static int 1293 resource_find(const char *name, int unit, const char *resname, 1294 struct config_resource **result) 1295 { 1296 int i, j; 1297 struct config_resource *res; 1298 1299 /* 1300 * First check specific instances, then generic. 1301 */ 1302 for (i = 0; i < devtab_count; i++) { 1303 if (devtab[i].unit < 0) 1304 continue; 1305 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1306 res = devtab[i].resources; 1307 for (j = 0; j < devtab[i].resource_count; j++, res++) 1308 if (!strcmp(res->name, resname)) { 1309 *result = res; 1310 return(0); 1311 } 1312 } 1313 } 1314 for (i = 0; i < devtab_count; i++) { 1315 if (devtab[i].unit >= 0) 1316 continue; 1317 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1318 /* XXX if so, then the generic match does nothing */ 1319 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1320 res = devtab[i].resources; 1321 for (j = 0; j < devtab[i].resource_count; j++, res++) 1322 if (!strcmp(res->name, resname)) { 1323 *result = res; 1324 return(0); 1325 } 1326 } 1327 } 1328 return(ENOENT); 1329 } 1330 1331 int 1332 resource_int_value(const char *name, int unit, const char *resname, int *result) 1333 { 1334 int error; 1335 struct config_resource *res; 1336 1337 if ((error = resource_find(name, unit, resname, &res)) != 0) 1338 return(error); 1339 if (res->type != RES_INT) 1340 return(EFTYPE); 1341 *result = res->u.intval; 1342 return(0); 1343 } 1344 1345 int 1346 resource_long_value(const char *name, int unit, const char *resname, 1347 long *result) 1348 { 1349 int error; 1350 struct config_resource *res; 1351 1352 if ((error = resource_find(name, unit, resname, &res)) != 0) 1353 return(error); 1354 if (res->type != RES_LONG) 1355 return(EFTYPE); 1356 *result = res->u.longval; 1357 return(0); 1358 } 1359 1360 int 1361 resource_string_value(const char *name, int unit, const char *resname, 1362 char **result) 1363 { 1364 int error; 1365 struct config_resource *res; 1366 1367 if ((error = resource_find(name, unit, resname, &res)) != 0) 1368 return(error); 1369 if (res->type != RES_STRING) 1370 return(EFTYPE); 1371 *result = res->u.stringval; 1372 return(0); 1373 } 1374 1375 int 1376 resource_query_string(int i, const char *resname, const char *value) 1377 { 1378 if (i < 0) 1379 i = 0; 1380 else 1381 i = i + 1; 1382 for (; i < devtab_count; i++) 1383 if (resource_match_string(i, resname, value) >= 0) 1384 return(i); 1385 return(-1); 1386 } 1387 1388 int 1389 resource_locate(int i, const char *resname) 1390 { 1391 if (i < 0) 1392 i = 0; 1393 else 1394 i = i + 1; 1395 for (; i < devtab_count; i++) 1396 if (!strcmp(devtab[i].name, resname)) 1397 return(i); 1398 return(-1); 1399 } 1400 1401 int 1402 resource_count(void) 1403 { 1404 return(devtab_count); 1405 } 1406 1407 char * 1408 resource_query_name(int i) 1409 { 1410 return(devtab[i].name); 1411 } 1412 1413 int 1414 resource_query_unit(int i) 1415 { 1416 return(devtab[i].unit); 1417 } 1418 1419 static int 1420 resource_create(const char *name, int unit, const char *resname, 1421 resource_type type, struct config_resource **result) 1422 { 1423 int i, j; 1424 struct config_resource *res = NULL; 1425 1426 for (i = 0; i < devtab_count; i++) 1427 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1428 res = devtab[i].resources; 1429 break; 1430 } 1431 if (res == NULL) { 1432 i = resource_new_name(name, unit); 1433 if (i < 0) 1434 return(ENOMEM); 1435 res = devtab[i].resources; 1436 } 1437 for (j = 0; j < devtab[i].resource_count; j++, res++) 1438 if (!strcmp(res->name, resname)) { 1439 *result = res; 1440 return(0); 1441 } 1442 j = resource_new_resname(i, resname, type); 1443 if (j < 0) 1444 return(ENOMEM); 1445 res = &devtab[i].resources[j]; 1446 *result = res; 1447 return(0); 1448 } 1449 1450 int 1451 resource_set_int(const char *name, int unit, const char *resname, int value) 1452 { 1453 int error; 1454 struct config_resource *res; 1455 1456 error = resource_create(name, unit, resname, RES_INT, &res); 1457 if (error) 1458 return(error); 1459 if (res->type != RES_INT) 1460 return(EFTYPE); 1461 res->u.intval = value; 1462 return(0); 1463 } 1464 1465 int 1466 resource_set_long(const char *name, int unit, const char *resname, long value) 1467 { 1468 int error; 1469 struct config_resource *res; 1470 1471 error = resource_create(name, unit, resname, RES_LONG, &res); 1472 if (error) 1473 return(error); 1474 if (res->type != RES_LONG) 1475 return(EFTYPE); 1476 res->u.longval = value; 1477 return(0); 1478 } 1479 1480 int 1481 resource_set_string(const char *name, int unit, const char *resname, 1482 const char *value) 1483 { 1484 int error; 1485 struct config_resource *res; 1486 1487 error = resource_create(name, unit, resname, RES_STRING, &res); 1488 if (error) 1489 return(error); 1490 if (res->type != RES_STRING) 1491 return(EFTYPE); 1492 if (res->u.stringval) 1493 free(res->u.stringval, M_TEMP); 1494 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 1495 if (res->u.stringval == NULL) 1496 return(ENOMEM); 1497 strcpy(res->u.stringval, value); 1498 return(0); 1499 } 1500 1501 static void 1502 resource_cfgload(void *dummy __unused) 1503 { 1504 struct config_resource *res, *cfgres; 1505 int i, j; 1506 int error; 1507 char *name, *resname; 1508 int unit; 1509 resource_type type; 1510 char *stringval; 1511 int config_devtab_count; 1512 1513 config_devtab_count = devtab_count; 1514 devtab = NULL; 1515 devtab_count = 0; 1516 1517 for (i = 0; i < config_devtab_count; i++) { 1518 name = config_devtab[i].name; 1519 unit = config_devtab[i].unit; 1520 1521 for (j = 0; j < config_devtab[i].resource_count; j++) { 1522 cfgres = config_devtab[i].resources; 1523 resname = cfgres[j].name; 1524 type = cfgres[j].type; 1525 error = resource_create(name, unit, resname, type, 1526 &res); 1527 if (error) { 1528 printf("create resource %s%d: error %d\n", 1529 name, unit, error); 1530 continue; 1531 } 1532 if (res->type != type) { 1533 printf("type mismatch %s%d: %d != %d\n", 1534 name, unit, res->type, type); 1535 continue; 1536 } 1537 switch (type) { 1538 case RES_INT: 1539 res->u.intval = cfgres[j].u.intval; 1540 break; 1541 case RES_LONG: 1542 res->u.longval = cfgres[j].u.longval; 1543 break; 1544 case RES_STRING: 1545 if (res->u.stringval) 1546 free(res->u.stringval, M_TEMP); 1547 stringval = cfgres[j].u.stringval; 1548 res->u.stringval = malloc(strlen(stringval) + 1, 1549 M_TEMP, M_INTWAIT); 1550 if (res->u.stringval == NULL) 1551 break; 1552 strcpy(res->u.stringval, stringval); 1553 break; 1554 default: 1555 panic("unknown resource type %d\n", type); 1556 } 1557 } 1558 } 1559 } 1560 SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1561 1562 1563 /*======================================*/ 1564 /* 1565 * Some useful method implementations to make life easier for bus drivers. 1566 */ 1567 1568 void 1569 resource_list_init(struct resource_list *rl) 1570 { 1571 SLIST_INIT(rl); 1572 } 1573 1574 void 1575 resource_list_free(struct resource_list *rl) 1576 { 1577 struct resource_list_entry *rle; 1578 1579 while ((rle = SLIST_FIRST(rl)) != NULL) { 1580 if (rle->res) 1581 panic("resource_list_free: resource entry is busy"); 1582 SLIST_REMOVE_HEAD(rl, link); 1583 free(rle, M_BUS); 1584 } 1585 } 1586 1587 void 1588 resource_list_add(struct resource_list *rl, 1589 int type, int rid, 1590 u_long start, u_long end, u_long count) 1591 { 1592 struct resource_list_entry *rle; 1593 1594 rle = resource_list_find(rl, type, rid); 1595 if (rle == NULL) { 1596 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1597 M_INTWAIT); 1598 if (!rle) 1599 panic("resource_list_add: can't record entry"); 1600 SLIST_INSERT_HEAD(rl, rle, link); 1601 rle->type = type; 1602 rle->rid = rid; 1603 rle->res = NULL; 1604 } 1605 1606 if (rle->res) 1607 panic("resource_list_add: resource entry is busy"); 1608 1609 rle->start = start; 1610 rle->end = end; 1611 rle->count = count; 1612 } 1613 1614 struct resource_list_entry* 1615 resource_list_find(struct resource_list *rl, 1616 int type, int rid) 1617 { 1618 struct resource_list_entry *rle; 1619 1620 SLIST_FOREACH(rle, rl, link) 1621 if (rle->type == type && rle->rid == rid) 1622 return(rle); 1623 return(NULL); 1624 } 1625 1626 void 1627 resource_list_delete(struct resource_list *rl, 1628 int type, int rid) 1629 { 1630 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1631 1632 if (rle) { 1633 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1634 free(rle, M_BUS); 1635 } 1636 } 1637 1638 struct resource * 1639 resource_list_alloc(struct resource_list *rl, 1640 device_t bus, device_t child, 1641 int type, int *rid, 1642 u_long start, u_long end, 1643 u_long count, u_int flags) 1644 { 1645 struct resource_list_entry *rle = 0; 1646 int passthrough = (device_get_parent(child) != bus); 1647 int isdefault = (start == 0UL && end == ~0UL); 1648 1649 if (passthrough) { 1650 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1651 type, rid, 1652 start, end, count, flags)); 1653 } 1654 1655 rle = resource_list_find(rl, type, *rid); 1656 1657 if (!rle) 1658 return(0); /* no resource of that type/rid */ 1659 if (rle->res) 1660 panic("resource_list_alloc: resource entry is busy"); 1661 1662 if (isdefault) { 1663 start = rle->start; 1664 count = max(count, rle->count); 1665 end = max(rle->end, start + count - 1); 1666 } 1667 1668 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1669 type, rid, start, end, count, flags); 1670 1671 /* 1672 * Record the new range. 1673 */ 1674 if (rle->res) { 1675 rle->start = rman_get_start(rle->res); 1676 rle->end = rman_get_end(rle->res); 1677 rle->count = count; 1678 } 1679 1680 return(rle->res); 1681 } 1682 1683 int 1684 resource_list_release(struct resource_list *rl, 1685 device_t bus, device_t child, 1686 int type, int rid, struct resource *res) 1687 { 1688 struct resource_list_entry *rle = 0; 1689 int passthrough = (device_get_parent(child) != bus); 1690 int error; 1691 1692 if (passthrough) { 1693 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1694 type, rid, res)); 1695 } 1696 1697 rle = resource_list_find(rl, type, rid); 1698 1699 if (!rle) 1700 panic("resource_list_release: can't find resource"); 1701 if (!rle->res) 1702 panic("resource_list_release: resource entry is not busy"); 1703 1704 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1705 type, rid, res); 1706 if (error) 1707 return(error); 1708 1709 rle->res = NULL; 1710 return(0); 1711 } 1712 1713 int 1714 resource_list_print_type(struct resource_list *rl, const char *name, int type, 1715 const char *format) 1716 { 1717 struct resource_list_entry *rle; 1718 int printed, retval; 1719 1720 printed = 0; 1721 retval = 0; 1722 /* Yes, this is kinda cheating */ 1723 SLIST_FOREACH(rle, rl, link) { 1724 if (rle->type == type) { 1725 if (printed == 0) 1726 retval += printf(" %s ", name); 1727 else 1728 retval += printf(","); 1729 printed++; 1730 retval += printf(format, rle->start); 1731 if (rle->count > 1) { 1732 retval += printf("-"); 1733 retval += printf(format, rle->start + 1734 rle->count - 1); 1735 } 1736 } 1737 } 1738 return(retval); 1739 } 1740 1741 /* 1742 * Call DEVICE_IDENTIFY for each driver. 1743 */ 1744 int 1745 bus_generic_probe(device_t dev) 1746 { 1747 devclass_t dc = dev->devclass; 1748 driverlink_t dl; 1749 1750 TAILQ_FOREACH(dl, &dc->drivers, link) 1751 DEVICE_IDENTIFY(dl->driver, dev); 1752 1753 return(0); 1754 } 1755 1756 int 1757 bus_generic_attach(device_t dev) 1758 { 1759 device_t child; 1760 1761 TAILQ_FOREACH(child, &dev->children, link) 1762 device_probe_and_attach(child); 1763 1764 return(0); 1765 } 1766 1767 int 1768 bus_generic_detach(device_t dev) 1769 { 1770 device_t child; 1771 int error; 1772 1773 if (dev->state != DS_ATTACHED) 1774 return(EBUSY); 1775 1776 TAILQ_FOREACH(child, &dev->children, link) 1777 if ((error = device_detach(child)) != 0) 1778 return(error); 1779 1780 return 0; 1781 } 1782 1783 int 1784 bus_generic_shutdown(device_t dev) 1785 { 1786 device_t child; 1787 1788 TAILQ_FOREACH(child, &dev->children, link) 1789 device_shutdown(child); 1790 1791 return(0); 1792 } 1793 1794 int 1795 bus_generic_suspend(device_t dev) 1796 { 1797 int error; 1798 device_t child, child2; 1799 1800 TAILQ_FOREACH(child, &dev->children, link) { 1801 error = DEVICE_SUSPEND(child); 1802 if (error) { 1803 for (child2 = TAILQ_FIRST(&dev->children); 1804 child2 && child2 != child; 1805 child2 = TAILQ_NEXT(child2, link)) 1806 DEVICE_RESUME(child2); 1807 return(error); 1808 } 1809 } 1810 return(0); 1811 } 1812 1813 int 1814 bus_generic_resume(device_t dev) 1815 { 1816 device_t child; 1817 1818 TAILQ_FOREACH(child, &dev->children, link) 1819 DEVICE_RESUME(child); 1820 /* if resume fails, there's nothing we can usefully do... */ 1821 1822 return(0); 1823 } 1824 1825 int 1826 bus_print_child_header(device_t dev, device_t child) 1827 { 1828 int retval = 0; 1829 1830 if (device_get_desc(child)) 1831 retval += device_printf(child, "<%s>", device_get_desc(child)); 1832 else 1833 retval += printf("%s", device_get_nameunit(child)); 1834 1835 return(retval); 1836 } 1837 1838 int 1839 bus_print_child_footer(device_t dev, device_t child) 1840 { 1841 return(printf(" on %s\n", device_get_nameunit(dev))); 1842 } 1843 1844 int 1845 bus_generic_print_child(device_t dev, device_t child) 1846 { 1847 int retval = 0; 1848 1849 retval += bus_print_child_header(dev, child); 1850 retval += bus_print_child_footer(dev, child); 1851 1852 return(retval); 1853 } 1854 1855 int 1856 bus_generic_read_ivar(device_t dev, device_t child, int index, 1857 uintptr_t * result) 1858 { 1859 return(ENOENT); 1860 } 1861 1862 int 1863 bus_generic_write_ivar(device_t dev, device_t child, int index, 1864 uintptr_t value) 1865 { 1866 return(ENOENT); 1867 } 1868 1869 struct resource_list * 1870 bus_generic_get_resource_list(device_t dev, device_t child) 1871 { 1872 return(NULL); 1873 } 1874 1875 void 1876 bus_generic_driver_added(device_t dev, driver_t *driver) 1877 { 1878 device_t child; 1879 1880 DEVICE_IDENTIFY(driver, dev); 1881 TAILQ_FOREACH(child, &dev->children, link) 1882 if (child->state == DS_NOTPRESENT) 1883 device_probe_and_attach(child); 1884 } 1885 1886 int 1887 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1888 int flags, driver_intr_t *intr, void *arg, 1889 void **cookiep) 1890 { 1891 /* Propagate up the bus hierarchy until someone handles it. */ 1892 if (dev->parent) 1893 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 1894 intr, arg, cookiep)); 1895 else 1896 return(EINVAL); 1897 } 1898 1899 int 1900 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1901 void *cookie) 1902 { 1903 /* Propagate up the bus hierarchy until someone handles it. */ 1904 if (dev->parent) 1905 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1906 else 1907 return(EINVAL); 1908 } 1909 1910 struct resource * 1911 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1912 u_long start, u_long end, u_long count, u_int flags) 1913 { 1914 /* Propagate up the bus hierarchy until someone handles it. */ 1915 if (dev->parent) 1916 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1917 start, end, count, flags)); 1918 else 1919 return(NULL); 1920 } 1921 1922 int 1923 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1924 struct resource *r) 1925 { 1926 /* Propagate up the bus hierarchy until someone handles it. */ 1927 if (dev->parent) 1928 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 1929 else 1930 return(EINVAL); 1931 } 1932 1933 int 1934 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1935 struct resource *r) 1936 { 1937 /* Propagate up the bus hierarchy until someone handles it. */ 1938 if (dev->parent) 1939 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 1940 else 1941 return(EINVAL); 1942 } 1943 1944 int 1945 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1946 int rid, struct resource *r) 1947 { 1948 /* Propagate up the bus hierarchy until someone handles it. */ 1949 if (dev->parent) 1950 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1951 r)); 1952 else 1953 return(EINVAL); 1954 } 1955 1956 int 1957 bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, 1958 enum intr_polarity pol) 1959 { 1960 /* Propagate up the bus hierarchy until someone handles it. */ 1961 if (dev->parent) 1962 return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); 1963 else 1964 return(EINVAL); 1965 } 1966 1967 int 1968 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 1969 u_long *startp, u_long *countp) 1970 { 1971 struct resource_list *rl = NULL; 1972 struct resource_list_entry *rle = NULL; 1973 1974 rl = BUS_GET_RESOURCE_LIST(dev, child); 1975 if (!rl) 1976 return(EINVAL); 1977 1978 rle = resource_list_find(rl, type, rid); 1979 if (!rle) 1980 return(ENOENT); 1981 1982 if (startp) 1983 *startp = rle->start; 1984 if (countp) 1985 *countp = rle->count; 1986 1987 return(0); 1988 } 1989 1990 int 1991 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 1992 u_long start, u_long count) 1993 { 1994 struct resource_list *rl = NULL; 1995 1996 rl = BUS_GET_RESOURCE_LIST(dev, child); 1997 if (!rl) 1998 return(EINVAL); 1999 2000 resource_list_add(rl, type, rid, start, (start + count - 1), count); 2001 2002 return(0); 2003 } 2004 2005 void 2006 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2007 { 2008 struct resource_list *rl = NULL; 2009 2010 rl = BUS_GET_RESOURCE_LIST(dev, child); 2011 if (!rl) 2012 return; 2013 2014 resource_list_delete(rl, type, rid); 2015 } 2016 2017 int 2018 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2019 int rid, struct resource *r) 2020 { 2021 struct resource_list *rl = NULL; 2022 2023 rl = BUS_GET_RESOURCE_LIST(dev, child); 2024 if (!rl) 2025 return(EINVAL); 2026 2027 return(resource_list_release(rl, dev, child, type, rid, r)); 2028 } 2029 2030 struct resource * 2031 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2032 int *rid, u_long start, u_long end, u_long count, u_int flags) 2033 { 2034 struct resource_list *rl = NULL; 2035 2036 rl = BUS_GET_RESOURCE_LIST(dev, child); 2037 if (!rl) 2038 return(NULL); 2039 2040 return(resource_list_alloc(rl, dev, child, type, rid, 2041 start, end, count, flags)); 2042 } 2043 2044 int 2045 bus_generic_child_present(device_t bus, device_t child) 2046 { 2047 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2048 } 2049 2050 2051 /* 2052 * Some convenience functions to make it easier for drivers to use the 2053 * resource-management functions. All these really do is hide the 2054 * indirection through the parent's method table, making for slightly 2055 * less-wordy code. In the future, it might make sense for this code 2056 * to maintain some sort of a list of resources allocated by each device. 2057 */ 2058 struct resource * 2059 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2060 u_long count, u_int flags) 2061 { 2062 if (dev->parent == 0) 2063 return(0); 2064 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2065 count, flags)); 2066 } 2067 2068 int 2069 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2070 { 2071 if (dev->parent == 0) 2072 return(EINVAL); 2073 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2074 } 2075 2076 int 2077 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2078 { 2079 if (dev->parent == 0) 2080 return(EINVAL); 2081 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2082 } 2083 2084 int 2085 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2086 { 2087 if (dev->parent == 0) 2088 return(EINVAL); 2089 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2090 } 2091 2092 int 2093 bus_setup_intr(device_t dev, struct resource *r, int flags, 2094 driver_intr_t handler, void *arg, void **cookiep) 2095 { 2096 if (dev->parent == 0) 2097 return(EINVAL); 2098 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2099 cookiep)); 2100 } 2101 2102 int 2103 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2104 { 2105 if (dev->parent == 0) 2106 return(EINVAL); 2107 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2108 } 2109 2110 int 2111 bus_set_resource(device_t dev, int type, int rid, 2112 u_long start, u_long count) 2113 { 2114 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2115 start, count)); 2116 } 2117 2118 int 2119 bus_get_resource(device_t dev, int type, int rid, 2120 u_long *startp, u_long *countp) 2121 { 2122 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2123 startp, countp)); 2124 } 2125 2126 u_long 2127 bus_get_resource_start(device_t dev, int type, int rid) 2128 { 2129 u_long start, count; 2130 int error; 2131 2132 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2133 &start, &count); 2134 if (error) 2135 return(0); 2136 return(start); 2137 } 2138 2139 u_long 2140 bus_get_resource_count(device_t dev, int type, int rid) 2141 { 2142 u_long start, count; 2143 int error; 2144 2145 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2146 &start, &count); 2147 if (error) 2148 return(0); 2149 return(count); 2150 } 2151 2152 void 2153 bus_delete_resource(device_t dev, int type, int rid) 2154 { 2155 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2156 } 2157 2158 int 2159 bus_child_present(device_t child) 2160 { 2161 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2162 } 2163 2164 int 2165 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2166 { 2167 device_t parent; 2168 2169 parent = device_get_parent(child); 2170 if (parent == NULL) { 2171 *buf = '\0'; 2172 return (0); 2173 } 2174 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2175 } 2176 2177 int 2178 bus_child_location_str(device_t child, char *buf, size_t buflen) 2179 { 2180 device_t parent; 2181 2182 parent = device_get_parent(child); 2183 if (parent == NULL) { 2184 *buf = '\0'; 2185 return (0); 2186 } 2187 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2188 } 2189 2190 static int 2191 root_print_child(device_t dev, device_t child) 2192 { 2193 return(0); 2194 } 2195 2196 static int 2197 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2198 void **cookiep) 2199 { 2200 /* 2201 * If an interrupt mapping gets to here something bad has happened. 2202 */ 2203 panic("root_setup_intr"); 2204 } 2205 2206 /* 2207 * If we get here, assume that the device is permanant and really is 2208 * present in the system. Removable bus drivers are expected to intercept 2209 * this call long before it gets here. We return -1 so that drivers that 2210 * really care can check vs -1 or some ERRNO returned higher in the food 2211 * chain. 2212 */ 2213 static int 2214 root_child_present(device_t dev, device_t child) 2215 { 2216 return(-1); 2217 } 2218 2219 /* 2220 * XXX NOTE! other defaults may be set in bus_if.m 2221 */ 2222 static kobj_method_t root_methods[] = { 2223 /* Device interface */ 2224 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2225 KOBJMETHOD(device_suspend, bus_generic_suspend), 2226 KOBJMETHOD(device_resume, bus_generic_resume), 2227 2228 /* Bus interface */ 2229 KOBJMETHOD(bus_print_child, root_print_child), 2230 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2231 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2232 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2233 KOBJMETHOD(bus_child_present, root_child_present), 2234 2235 { 0, 0 } 2236 }; 2237 2238 static driver_t root_driver = { 2239 "root", 2240 root_methods, 2241 1, /* no softc */ 2242 }; 2243 2244 device_t root_bus; 2245 devclass_t root_devclass; 2246 2247 static int 2248 root_bus_module_handler(module_t mod, int what, void* arg) 2249 { 2250 switch (what) { 2251 case MOD_LOAD: 2252 root_bus = make_device(NULL, "root", 0); 2253 root_bus->desc = "System root bus"; 2254 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2255 root_bus->driver = &root_driver; 2256 root_bus->state = DS_ATTACHED; 2257 root_devclass = devclass_find_internal("root", FALSE); 2258 return(0); 2259 2260 case MOD_SHUTDOWN: 2261 device_shutdown(root_bus); 2262 return(0); 2263 default: 2264 return(0); 2265 } 2266 } 2267 2268 static moduledata_t root_bus_mod = { 2269 "rootbus", 2270 root_bus_module_handler, 2271 0 2272 }; 2273 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2274 2275 void 2276 root_bus_configure(void) 2277 { 2278 device_t dev; 2279 2280 PDEBUG((".")); 2281 2282 TAILQ_FOREACH(dev, &root_bus->children, link) 2283 device_probe_and_attach(dev); 2284 } 2285 2286 int 2287 driver_module_handler(module_t mod, int what, void *arg) 2288 { 2289 int error, i; 2290 struct driver_module_data *dmd; 2291 devclass_t bus_devclass; 2292 2293 dmd = (struct driver_module_data *)arg; 2294 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2295 error = 0; 2296 2297 switch (what) { 2298 case MOD_LOAD: 2299 if (dmd->dmd_chainevh) 2300 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2301 2302 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2303 PDEBUG(("Loading module: driver %s on bus %s", 2304 DRIVERNAME(dmd->dmd_drivers[i]), 2305 dmd->dmd_busname)); 2306 error = devclass_add_driver(bus_devclass, 2307 dmd->dmd_drivers[i]); 2308 } 2309 if (error) 2310 break; 2311 2312 /* 2313 * The drivers loaded in this way are assumed to all 2314 * implement the same devclass. 2315 */ 2316 *dmd->dmd_devclass = 2317 devclass_find_internal(dmd->dmd_drivers[0]->name, 2318 TRUE); 2319 break; 2320 2321 case MOD_UNLOAD: 2322 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2323 PDEBUG(("Unloading module: driver %s from bus %s", 2324 DRIVERNAME(dmd->dmd_drivers[i]), 2325 dmd->dmd_busname)); 2326 error = devclass_delete_driver(bus_devclass, 2327 dmd->dmd_drivers[i]); 2328 } 2329 2330 if (!error && dmd->dmd_chainevh) 2331 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2332 break; 2333 } 2334 2335 return (error); 2336 } 2337 2338 #ifdef BUS_DEBUG 2339 2340 /* 2341 * The _short versions avoid iteration by not calling anything that prints 2342 * more than oneliners. I love oneliners. 2343 */ 2344 2345 static void 2346 print_device_short(device_t dev, int indent) 2347 { 2348 if (!dev) 2349 return; 2350 2351 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2352 dev->unit, dev->desc, 2353 (dev->parent? "":"no "), 2354 (TAILQ_EMPTY(&dev->children)? "no ":""), 2355 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2356 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2357 (dev->flags&DF_WILDCARD? "wildcard,":""), 2358 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2359 (dev->ivars? "":"no "), 2360 (dev->softc? "":"no "), 2361 dev->busy)); 2362 } 2363 2364 static void 2365 print_device(device_t dev, int indent) 2366 { 2367 if (!dev) 2368 return; 2369 2370 print_device_short(dev, indent); 2371 2372 indentprintf(("Parent:\n")); 2373 print_device_short(dev->parent, indent+1); 2374 indentprintf(("Driver:\n")); 2375 print_driver_short(dev->driver, indent+1); 2376 indentprintf(("Devclass:\n")); 2377 print_devclass_short(dev->devclass, indent+1); 2378 } 2379 2380 /* 2381 * Print the device and all its children (indented). 2382 */ 2383 void 2384 print_device_tree_short(device_t dev, int indent) 2385 { 2386 device_t child; 2387 2388 if (!dev) 2389 return; 2390 2391 print_device_short(dev, indent); 2392 2393 TAILQ_FOREACH(child, &dev->children, link) 2394 print_device_tree_short(child, indent+1); 2395 } 2396 2397 /* 2398 * Print the device and all its children (indented). 2399 */ 2400 void 2401 print_device_tree(device_t dev, int indent) 2402 { 2403 device_t child; 2404 2405 if (!dev) 2406 return; 2407 2408 print_device(dev, indent); 2409 2410 TAILQ_FOREACH(child, &dev->children, link) 2411 print_device_tree(child, indent+1); 2412 } 2413 2414 static void 2415 print_driver_short(driver_t *driver, int indent) 2416 { 2417 if (!driver) 2418 return; 2419 2420 indentprintf(("driver %s: softc size = %d\n", 2421 driver->name, driver->size)); 2422 } 2423 2424 static void 2425 print_driver(driver_t *driver, int indent) 2426 { 2427 if (!driver) 2428 return; 2429 2430 print_driver_short(driver, indent); 2431 } 2432 2433 2434 static void 2435 print_driver_list(driver_list_t drivers, int indent) 2436 { 2437 driverlink_t driver; 2438 2439 TAILQ_FOREACH(driver, &drivers, link) 2440 print_driver(driver->driver, indent); 2441 } 2442 2443 static void 2444 print_devclass_short(devclass_t dc, int indent) 2445 { 2446 if (!dc) 2447 return; 2448 2449 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2450 } 2451 2452 static void 2453 print_devclass(devclass_t dc, int indent) 2454 { 2455 int i; 2456 2457 if (!dc) 2458 return; 2459 2460 print_devclass_short(dc, indent); 2461 indentprintf(("Drivers:\n")); 2462 print_driver_list(dc->drivers, indent+1); 2463 2464 indentprintf(("Devices:\n")); 2465 for (i = 0; i < dc->maxunit; i++) 2466 if (dc->devices[i]) 2467 print_device(dc->devices[i], indent+1); 2468 } 2469 2470 void 2471 print_devclass_list_short(void) 2472 { 2473 devclass_t dc; 2474 2475 printf("Short listing of devclasses, drivers & devices:\n"); 2476 TAILQ_FOREACH(dc, &devclasses, link) { 2477 print_devclass_short(dc, 0); 2478 } 2479 } 2480 2481 void 2482 print_devclass_list(void) 2483 { 2484 devclass_t dc; 2485 2486 printf("Full listing of devclasses, drivers & devices:\n"); 2487 TAILQ_FOREACH(dc, &devclasses, link) { 2488 print_devclass(dc, 0); 2489 } 2490 } 2491 2492 #endif 2493 2494 /* 2495 * Check to see if a device is disabled via a disabled hint. 2496 */ 2497 int 2498 resource_disabled(const char *name, int unit) 2499 { 2500 int error, value; 2501 2502 error = resource_int_value(name, unit, "disabled", &value); 2503 if (error) 2504 return(0); 2505 return(value); 2506 } 2507