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 1.27 2005/06/27 12:24:46 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("%s:%d: ", __func__, __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, const char *parentname, 111 int create) 112 { 113 devclass_t dc; 114 115 PDEBUG(("looking for %s", classname)); 116 if (classname == NULL) 117 return(NULL); 118 119 TAILQ_FOREACH(dc, &devclasses, link) 120 if (!strcmp(dc->name, classname)) 121 break; 122 123 if (create && !dc) { 124 PDEBUG(("creating %s", classname)); 125 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 126 M_BUS, M_INTWAIT | M_ZERO); 127 if (!dc) 128 return(NULL); 129 dc->parent = NULL; 130 dc->name = (char*) (dc + 1); 131 strcpy(dc->name, classname); 132 dc->devices = NULL; 133 dc->maxunit = 0; 134 TAILQ_INIT(&dc->drivers); 135 TAILQ_INSERT_TAIL(&devclasses, dc, link); 136 } 137 if (parentname && dc && !dc->parent) 138 dc->parent = devclass_find_internal(parentname, NULL, FALSE); 139 140 return(dc); 141 } 142 143 devclass_t 144 devclass_create(const char *classname) 145 { 146 return(devclass_find_internal(classname, NULL, TRUE)); 147 } 148 149 devclass_t 150 devclass_find(const char *classname) 151 { 152 return(devclass_find_internal(classname, NULL, FALSE)); 153 } 154 155 int 156 devclass_add_driver(devclass_t dc, driver_t *driver) 157 { 158 driverlink_t dl; 159 int i; 160 161 PDEBUG(("%s", DRIVERNAME(driver))); 162 163 dl = malloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 164 if (!dl) 165 return(ENOMEM); 166 167 /* 168 * Compile the driver's methods. Also increase the reference count 169 * so that the class doesn't get freed when the last instance 170 * goes. This means we can safely use static methods and avoids a 171 * double-free in devclass_delete_driver. 172 */ 173 kobj_class_instantiate(driver); 174 175 /* 176 * Make sure the devclass which the driver is implementing exists. 177 */ 178 devclass_find_internal(driver->name, NULL, TRUE); 179 180 dl->driver = driver; 181 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 182 183 /* 184 * Call BUS_DRIVER_ADDED for any existing busses in this class. 185 */ 186 for (i = 0; i < dc->maxunit; i++) 187 if (dc->devices[i]) 188 BUS_DRIVER_ADDED(dc->devices[i], driver); 189 190 return(0); 191 } 192 193 int 194 devclass_delete_driver(devclass_t busclass, driver_t *driver) 195 { 196 devclass_t dc = devclass_find(driver->name); 197 driverlink_t dl; 198 device_t dev; 199 int i; 200 int error; 201 202 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 203 204 if (!dc) 205 return(0); 206 207 /* 208 * Find the link structure in the bus' list of drivers. 209 */ 210 TAILQ_FOREACH(dl, &busclass->drivers, link) 211 if (dl->driver == driver) 212 break; 213 214 if (!dl) { 215 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 216 return(ENOENT); 217 } 218 219 /* 220 * Disassociate from any devices. We iterate through all the 221 * devices in the devclass of the driver and detach any which are 222 * using the driver and which have a parent in the devclass which 223 * we are deleting from. 224 * 225 * Note that since a driver can be in multiple devclasses, we 226 * should not detach devices which are not children of devices in 227 * the affected devclass. 228 */ 229 for (i = 0; i < dc->maxunit; i++) 230 if (dc->devices[i]) { 231 dev = dc->devices[i]; 232 if (dev->driver == driver && dev->parent && 233 dev->parent->devclass == busclass) { 234 if ((error = device_detach(dev)) != 0) 235 return(error); 236 device_set_driver(dev, NULL); 237 } 238 } 239 240 TAILQ_REMOVE(&busclass->drivers, dl, link); 241 free(dl, M_BUS); 242 243 kobj_class_uninstantiate(driver); 244 245 return(0); 246 } 247 248 static driverlink_t 249 devclass_find_driver_internal(devclass_t dc, const char *classname) 250 { 251 driverlink_t dl; 252 253 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 254 255 TAILQ_FOREACH(dl, &dc->drivers, link) 256 if (!strcmp(dl->driver->name, classname)) 257 return(dl); 258 259 PDEBUG(("not found")); 260 return(NULL); 261 } 262 263 kobj_class_t 264 devclass_find_driver(devclass_t dc, const char *classname) 265 { 266 driverlink_t dl; 267 268 dl = devclass_find_driver_internal(dc, classname); 269 if (dl) 270 return(dl->driver); 271 else 272 return(NULL); 273 } 274 275 const char * 276 devclass_get_name(devclass_t dc) 277 { 278 return(dc->name); 279 } 280 281 device_t 282 devclass_get_device(devclass_t dc, int unit) 283 { 284 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 285 return(NULL); 286 return(dc->devices[unit]); 287 } 288 289 void * 290 devclass_get_softc(devclass_t dc, int unit) 291 { 292 device_t dev; 293 294 dev = devclass_get_device(dc, unit); 295 if (!dev) 296 return(NULL); 297 298 return(device_get_softc(dev)); 299 } 300 301 int 302 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 303 { 304 int i; 305 int count; 306 device_t *list; 307 308 count = 0; 309 for (i = 0; i < dc->maxunit; i++) 310 if (dc->devices[i]) 311 count++; 312 313 list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 314 if (list == NULL) 315 return(ENOMEM); 316 317 count = 0; 318 for (i = 0; i < dc->maxunit; i++) 319 if (dc->devices[i]) { 320 list[count] = dc->devices[i]; 321 count++; 322 } 323 324 *devlistp = list; 325 *devcountp = count; 326 327 return(0); 328 } 329 330 int 331 devclass_get_maxunit(devclass_t dc) 332 { 333 return(dc->maxunit); 334 } 335 336 void 337 devclass_set_parent(devclass_t dc, devclass_t pdc) 338 { 339 dc->parent = pdc; 340 } 341 342 devclass_t 343 devclass_get_parent(devclass_t dc) 344 { 345 return(dc->parent); 346 } 347 348 static int 349 devclass_alloc_unit(devclass_t dc, int *unitp) 350 { 351 int unit = *unitp; 352 353 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 354 355 /* If we have been given a wired unit number, check for existing device */ 356 if (unit != -1) { 357 if (unit >= 0 && unit < dc->maxunit && 358 dc->devices[unit] != NULL) { 359 if (bootverbose) 360 printf("%s-: %s%d exists, using next available unit number\n", 361 dc->name, dc->name, unit); 362 /* find the next available slot */ 363 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 364 ; 365 } 366 } else { 367 /* Unwired device, find the next available slot for it */ 368 unit = 0; 369 while (unit < dc->maxunit && dc->devices[unit] != NULL) 370 unit++; 371 } 372 373 /* 374 * We've selected a unit beyond the length of the table, so let's 375 * extend the table to make room for all units up to and including 376 * this one. 377 */ 378 if (unit >= dc->maxunit) { 379 device_t *newlist; 380 int newsize; 381 382 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 383 newlist = malloc(sizeof(device_t) * newsize, M_BUS, 384 M_INTWAIT | M_ZERO); 385 if (newlist == NULL) 386 return(ENOMEM); 387 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 388 if (dc->devices) 389 free(dc->devices, M_BUS); 390 dc->devices = newlist; 391 dc->maxunit = newsize; 392 } 393 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 394 395 *unitp = unit; 396 return(0); 397 } 398 399 static int 400 devclass_add_device(devclass_t dc, device_t dev) 401 { 402 int buflen, error; 403 404 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 405 406 buflen = strlen(dc->name) + 5; 407 dev->nameunit = malloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 408 if (!dev->nameunit) 409 return(ENOMEM); 410 411 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 412 free(dev->nameunit, M_BUS); 413 dev->nameunit = NULL; 414 return(error); 415 } 416 dc->devices[dev->unit] = dev; 417 dev->devclass = dc; 418 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 419 420 #ifdef DEVICE_SYSCTLS 421 device_register_oids(dev); 422 #endif 423 424 return(0); 425 } 426 427 static int 428 devclass_delete_device(devclass_t dc, device_t dev) 429 { 430 if (!dc || !dev) 431 return(0); 432 433 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 434 435 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 436 panic("devclass_delete_device: inconsistent device class"); 437 dc->devices[dev->unit] = NULL; 438 if (dev->flags & DF_WILDCARD) 439 dev->unit = -1; 440 dev->devclass = NULL; 441 free(dev->nameunit, M_BUS); 442 dev->nameunit = NULL; 443 444 #ifdef DEVICE_SYSCTLS 445 device_unregister_oids(dev); 446 #endif 447 448 return(0); 449 } 450 451 static device_t 452 make_device(device_t parent, const char *name, int unit) 453 { 454 device_t dev; 455 devclass_t dc; 456 457 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 458 459 if (name != NULL) { 460 dc = devclass_find_internal(name, NULL, TRUE); 461 if (!dc) { 462 printf("make_device: can't find device class %s\n", name); 463 return(NULL); 464 } 465 } else 466 dc = NULL; 467 468 dev = malloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); 469 if (!dev) 470 return(0); 471 472 dev->parent = parent; 473 TAILQ_INIT(&dev->children); 474 kobj_init((kobj_t) dev, &null_class); 475 dev->driver = NULL; 476 dev->devclass = NULL; 477 dev->unit = unit; 478 dev->nameunit = NULL; 479 dev->desc = NULL; 480 dev->busy = 0; 481 dev->devflags = 0; 482 dev->flags = DF_ENABLED; 483 dev->order = 0; 484 if (unit == -1) 485 dev->flags |= DF_WILDCARD; 486 if (name) { 487 dev->flags |= DF_FIXEDCLASS; 488 if (devclass_add_device(dc, dev) != 0) { 489 kobj_delete((kobj_t)dev, M_BUS); 490 return(NULL); 491 } 492 } 493 dev->ivars = NULL; 494 dev->softc = NULL; 495 496 dev->state = DS_NOTPRESENT; 497 498 return(dev); 499 } 500 501 static int 502 device_print_child(device_t dev, device_t child) 503 { 504 int retval = 0; 505 506 if (device_is_alive(child)) 507 retval += BUS_PRINT_CHILD(dev, child); 508 else 509 retval += device_printf(child, " not found\n"); 510 511 return(retval); 512 } 513 514 device_t 515 device_add_child(device_t dev, const char *name, int unit) 516 { 517 return device_add_child_ordered(dev, 0, name, unit); 518 } 519 520 device_t 521 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 522 { 523 device_t child; 524 device_t place; 525 526 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 527 order, unit)); 528 529 child = make_device(dev, name, unit); 530 if (child == NULL) 531 return child; 532 child->order = order; 533 534 TAILQ_FOREACH(place, &dev->children, link) 535 if (place->order > order) 536 break; 537 538 if (place) { 539 /* 540 * The device 'place' is the first device whose order is 541 * greater than the new child. 542 */ 543 TAILQ_INSERT_BEFORE(place, child, link); 544 } else { 545 /* 546 * The new child's order is greater or equal to the order of 547 * any existing device. Add the child to the tail of the list. 548 */ 549 TAILQ_INSERT_TAIL(&dev->children, child, link); 550 } 551 552 return(child); 553 } 554 555 int 556 device_delete_child(device_t dev, device_t child) 557 { 558 int error; 559 device_t grandchild; 560 561 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 562 563 /* remove children first */ 564 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 565 error = device_delete_child(child, grandchild); 566 if (error) 567 return(error); 568 } 569 570 if ((error = device_detach(child)) != 0) 571 return(error); 572 if (child->devclass) 573 devclass_delete_device(child->devclass, child); 574 TAILQ_REMOVE(&dev->children, child, link); 575 device_set_desc(child, NULL); 576 kobj_delete((kobj_t)child, M_BUS); 577 578 return(0); 579 } 580 581 /* 582 * Find only devices attached to this bus. 583 */ 584 device_t 585 device_find_child(device_t dev, const char *classname, int unit) 586 { 587 devclass_t dc; 588 device_t child; 589 590 dc = devclass_find(classname); 591 if (!dc) 592 return(NULL); 593 594 child = devclass_get_device(dc, unit); 595 if (child && child->parent == dev) 596 return(child); 597 return(NULL); 598 } 599 600 static driverlink_t 601 first_matching_driver(devclass_t dc, device_t dev) 602 { 603 if (dev->devclass) 604 return(devclass_find_driver_internal(dc, dev->devclass->name)); 605 else 606 return(TAILQ_FIRST(&dc->drivers)); 607 } 608 609 static driverlink_t 610 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 611 { 612 if (dev->devclass) { 613 driverlink_t dl; 614 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 615 if (!strcmp(dev->devclass->name, dl->driver->name)) 616 return(dl); 617 return(NULL); 618 } else 619 return(TAILQ_NEXT(last, link)); 620 } 621 622 static int 623 device_probe_child(device_t dev, device_t child) 624 { 625 devclass_t dc; 626 driverlink_t best = 0; 627 driverlink_t dl; 628 int result, pri = 0; 629 int hasclass = (child->devclass != 0); 630 631 dc = dev->devclass; 632 if (!dc) 633 panic("device_probe_child: parent device has no devclass"); 634 635 if (child->state == DS_ALIVE) 636 return(0); 637 638 for (; dc; dc = dc->parent) { 639 for (dl = first_matching_driver(dc, child); dl; 640 dl = next_matching_driver(dc, child, dl)) { 641 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 642 device_set_driver(child, dl->driver); 643 if (!hasclass) 644 device_set_devclass(child, dl->driver->name); 645 result = DEVICE_PROBE(child); 646 if (!hasclass) 647 device_set_devclass(child, 0); 648 649 /* 650 * If the driver returns SUCCESS, there can be 651 * no higher match for this device. 652 */ 653 if (result == 0) { 654 best = dl; 655 pri = 0; 656 break; 657 } 658 659 /* 660 * The driver returned an error so it 661 * certainly doesn't match. 662 */ 663 if (result > 0) { 664 device_set_driver(child, 0); 665 continue; 666 } 667 668 /* 669 * A priority lower than SUCCESS, remember the 670 * best matching driver. Initialise the value 671 * of pri for the first match. 672 */ 673 if (best == 0 || result > pri) { 674 best = dl; 675 pri = result; 676 continue; 677 } 678 } 679 /* 680 * If we have unambiguous match in this devclass, 681 * don't look in the parent. 682 */ 683 if (best && pri == 0) 684 break; 685 } 686 687 /* 688 * If we found a driver, change state and initialise the devclass. 689 */ 690 if (best) { 691 if (!child->devclass) 692 device_set_devclass(child, best->driver->name); 693 device_set_driver(child, best->driver); 694 if (pri < 0) { 695 /* 696 * A bit bogus. Call the probe method again to make 697 * sure that we have the right description. 698 */ 699 DEVICE_PROBE(child); 700 } 701 child->state = DS_ALIVE; 702 return(0); 703 } 704 705 return(ENXIO); 706 } 707 708 device_t 709 device_get_parent(device_t dev) 710 { 711 return dev->parent; 712 } 713 714 int 715 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 716 { 717 int count; 718 device_t child; 719 device_t *list; 720 721 count = 0; 722 TAILQ_FOREACH(child, &dev->children, link) 723 count++; 724 725 list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 726 if (!list) 727 return(ENOMEM); 728 729 count = 0; 730 TAILQ_FOREACH(child, &dev->children, link) { 731 list[count] = child; 732 count++; 733 } 734 735 *devlistp = list; 736 *devcountp = count; 737 738 return(0); 739 } 740 741 driver_t * 742 device_get_driver(device_t dev) 743 { 744 return(dev->driver); 745 } 746 747 devclass_t 748 device_get_devclass(device_t dev) 749 { 750 return(dev->devclass); 751 } 752 753 const char * 754 device_get_name(device_t dev) 755 { 756 if (dev->devclass) 757 return devclass_get_name(dev->devclass); 758 return(NULL); 759 } 760 761 const char * 762 device_get_nameunit(device_t dev) 763 { 764 return(dev->nameunit); 765 } 766 767 int 768 device_get_unit(device_t dev) 769 { 770 return(dev->unit); 771 } 772 773 const char * 774 device_get_desc(device_t dev) 775 { 776 return(dev->desc); 777 } 778 779 uint32_t 780 device_get_flags(device_t dev) 781 { 782 return(dev->devflags); 783 } 784 785 int 786 device_print_prettyname(device_t dev) 787 { 788 const char *name = device_get_name(dev); 789 790 if (name == 0) 791 return printf("unknown: "); 792 else 793 return printf("%s%d: ", name, device_get_unit(dev)); 794 } 795 796 int 797 device_printf(device_t dev, const char * fmt, ...) 798 { 799 __va_list ap; 800 int retval; 801 802 retval = device_print_prettyname(dev); 803 __va_start(ap, fmt); 804 retval += vprintf(fmt, ap); 805 __va_end(ap); 806 return retval; 807 } 808 809 static void 810 device_set_desc_internal(device_t dev, const char* desc, int copy) 811 { 812 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 813 free(dev->desc, M_BUS); 814 dev->flags &= ~DF_DESCMALLOCED; 815 dev->desc = NULL; 816 } 817 818 if (copy && desc) { 819 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 820 if (dev->desc) { 821 strcpy(dev->desc, desc); 822 dev->flags |= DF_DESCMALLOCED; 823 } 824 } else 825 /* Avoid a -Wcast-qual warning */ 826 dev->desc = (char *)(uintptr_t) desc; 827 828 #ifdef DEVICE_SYSCTLS 829 { 830 struct sysctl_oid *oid = &dev->oid[1]; 831 oid->oid_arg1 = dev->desc ? dev->desc : ""; 832 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 833 } 834 #endif 835 } 836 837 void 838 device_set_desc(device_t dev, const char* desc) 839 { 840 device_set_desc_internal(dev, desc, FALSE); 841 } 842 843 void 844 device_set_desc_copy(device_t dev, const char* desc) 845 { 846 device_set_desc_internal(dev, desc, TRUE); 847 } 848 849 void 850 device_set_flags(device_t dev, uint32_t flags) 851 { 852 dev->devflags = flags; 853 } 854 855 void * 856 device_get_softc(device_t dev) 857 { 858 return dev->softc; 859 } 860 861 void 862 device_set_softc(device_t dev, void *softc) 863 { 864 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 865 free(dev->softc, M_BUS); 866 dev->softc = softc; 867 if (dev->softc) 868 dev->flags |= DF_EXTERNALSOFTC; 869 else 870 dev->flags &= ~DF_EXTERNALSOFTC; 871 } 872 873 void * 874 device_get_ivars(device_t dev) 875 { 876 return dev->ivars; 877 } 878 879 void 880 device_set_ivars(device_t dev, void * ivars) 881 { 882 if (!dev) 883 return; 884 885 dev->ivars = ivars; 886 } 887 888 device_state_t 889 device_get_state(device_t dev) 890 { 891 return(dev->state); 892 } 893 894 void 895 device_enable(device_t dev) 896 { 897 dev->flags |= DF_ENABLED; 898 } 899 900 void 901 device_disable(device_t dev) 902 { 903 dev->flags &= ~DF_ENABLED; 904 } 905 906 /* 907 * YYY cannot block 908 */ 909 void 910 device_busy(device_t dev) 911 { 912 if (dev->state < DS_ATTACHED) 913 panic("device_busy: called for unattached device"); 914 if (dev->busy == 0 && dev->parent) 915 device_busy(dev->parent); 916 dev->busy++; 917 dev->state = DS_BUSY; 918 } 919 920 /* 921 * YYY cannot block 922 */ 923 void 924 device_unbusy(device_t dev) 925 { 926 if (dev->state != DS_BUSY) 927 panic("device_unbusy: called for non-busy device"); 928 dev->busy--; 929 if (dev->busy == 0) { 930 if (dev->parent) 931 device_unbusy(dev->parent); 932 dev->state = DS_ATTACHED; 933 } 934 } 935 936 void 937 device_quiet(device_t dev) 938 { 939 dev->flags |= DF_QUIET; 940 } 941 942 void 943 device_verbose(device_t dev) 944 { 945 dev->flags &= ~DF_QUIET; 946 } 947 948 int 949 device_is_quiet(device_t dev) 950 { 951 return((dev->flags & DF_QUIET) != 0); 952 } 953 954 int 955 device_is_enabled(device_t dev) 956 { 957 return((dev->flags & DF_ENABLED) != 0); 958 } 959 960 int 961 device_is_alive(device_t dev) 962 { 963 return(dev->state >= DS_ALIVE); 964 } 965 966 int 967 device_is_attached(device_t dev) 968 { 969 return(dev->state >= DS_ATTACHED); 970 } 971 972 int 973 device_set_devclass(device_t dev, const char *classname) 974 { 975 devclass_t dc; 976 977 if (!classname) { 978 if (dev->devclass) 979 devclass_delete_device(dev->devclass, dev); 980 return(0); 981 } 982 983 if (dev->devclass) { 984 printf("device_set_devclass: device class already set\n"); 985 return(EINVAL); 986 } 987 988 dc = devclass_find_internal(classname, NULL, TRUE); 989 if (!dc) 990 return(ENOMEM); 991 992 return(devclass_add_device(dc, dev)); 993 } 994 995 int 996 device_set_driver(device_t dev, driver_t *driver) 997 { 998 if (dev->state >= DS_ATTACHED) 999 return(EBUSY); 1000 1001 if (dev->driver == driver) 1002 return(0); 1003 1004 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1005 free(dev->softc, M_BUS); 1006 dev->softc = NULL; 1007 } 1008 kobj_delete((kobj_t) dev, 0); 1009 dev->driver = driver; 1010 if (driver) { 1011 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1012 if (!(dev->flags & DF_EXTERNALSOFTC)) { 1013 dev->softc = malloc(driver->size, M_BUS, 1014 M_INTWAIT | M_ZERO); 1015 if (!dev->softc) { 1016 kobj_delete((kobj_t)dev, 0); 1017 kobj_init((kobj_t) dev, &null_class); 1018 dev->driver = NULL; 1019 return(ENOMEM); 1020 } 1021 } 1022 } else 1023 kobj_init((kobj_t) dev, &null_class); 1024 return(0); 1025 } 1026 1027 int 1028 device_probe_and_attach(device_t dev) 1029 { 1030 device_t bus = dev->parent; 1031 int error = 0; 1032 int hasclass = (dev->devclass != 0); 1033 1034 if (dev->state >= DS_ALIVE) 1035 return(0); 1036 1037 if ((dev->flags & DF_ENABLED) == 0) { 1038 if (bootverbose) { 1039 device_print_prettyname(dev); 1040 printf("not probed (disabled)\n"); 1041 } 1042 return(0); 1043 } 1044 1045 error = device_probe_child(bus, dev); 1046 if (error) { 1047 if (!(dev->flags & DF_DONENOMATCH)) { 1048 BUS_PROBE_NOMATCH(bus, dev); 1049 dev->flags |= DF_DONENOMATCH; 1050 } 1051 return(error); 1052 } 1053 1054 /* 1055 * Output the exact device chain prior to the attach in case the 1056 * system locks up during attach, and generate the full info after 1057 * the attach so correct irq and other information is displayed. 1058 */ 1059 if (bootverbose && !device_is_quiet(dev)) { 1060 device_t tmp; 1061 1062 printf("%s", device_get_nameunit(dev)); 1063 for (tmp = dev->parent; tmp; tmp = tmp->parent) 1064 printf(".%s", device_get_nameunit(tmp)); 1065 printf("\n"); 1066 } 1067 if (!device_is_quiet(dev)) 1068 device_print_child(bus, dev); 1069 error = DEVICE_ATTACH(dev); 1070 if (error == 0) { 1071 dev->state = DS_ATTACHED; 1072 if (bootverbose && !device_is_quiet(dev)) 1073 device_print_child(bus, dev); 1074 } else { 1075 printf("device_probe_and_attach: %s%d attach returned %d\n", 1076 dev->driver->name, dev->unit, error); 1077 /* Unset the class that was set in device_probe_child */ 1078 if (!hasclass) 1079 device_set_devclass(dev, 0); 1080 device_set_driver(dev, NULL); 1081 dev->state = DS_NOTPRESENT; 1082 } 1083 1084 return(error); 1085 } 1086 1087 int 1088 device_detach(device_t dev) 1089 { 1090 int error; 1091 1092 PDEBUG(("%s", DEVICENAME(dev))); 1093 if (dev->state == DS_BUSY) 1094 return(EBUSY); 1095 if (dev->state != DS_ATTACHED) 1096 return(0); 1097 1098 if ((error = DEVICE_DETACH(dev)) != 0) 1099 return(error); 1100 device_printf(dev, "detached\n"); 1101 if (dev->parent) 1102 BUS_CHILD_DETACHED(dev->parent, dev); 1103 1104 if (!(dev->flags & DF_FIXEDCLASS)) 1105 devclass_delete_device(dev->devclass, dev); 1106 1107 dev->state = DS_NOTPRESENT; 1108 device_set_driver(dev, NULL); 1109 1110 return(0); 1111 } 1112 1113 int 1114 device_shutdown(device_t dev) 1115 { 1116 if (dev->state < DS_ATTACHED) 1117 return 0; 1118 PDEBUG(("%s", DEVICENAME(dev))); 1119 return DEVICE_SHUTDOWN(dev); 1120 } 1121 1122 int 1123 device_set_unit(device_t dev, int unit) 1124 { 1125 devclass_t dc; 1126 int err; 1127 1128 dc = device_get_devclass(dev); 1129 if (unit < dc->maxunit && dc->devices[unit]) 1130 return(EBUSY); 1131 err = devclass_delete_device(dc, dev); 1132 if (err) 1133 return(err); 1134 dev->unit = unit; 1135 err = devclass_add_device(dc, dev); 1136 return(err); 1137 } 1138 1139 #ifdef DEVICE_SYSCTLS 1140 1141 /* 1142 * Sysctl nodes for devices. 1143 */ 1144 1145 SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1146 1147 static int 1148 sysctl_handle_children(SYSCTL_HANDLER_ARGS) 1149 { 1150 device_t dev = arg1; 1151 device_t child; 1152 int first = 1, error = 0; 1153 1154 TAILQ_FOREACH(child, &dev->children, link) 1155 if (child->nameunit) { 1156 if (!first) { 1157 error = SYSCTL_OUT(req, ",", 1); 1158 if (error) 1159 return error; 1160 } else 1161 first = 0; 1162 error = SYSCTL_OUT(req, child->nameunit, 1163 strlen(child->nameunit)); 1164 if (error) 1165 return(error); 1166 } 1167 1168 error = SYSCTL_OUT(req, "", 1); 1169 1170 return(error); 1171 } 1172 1173 static int 1174 sysctl_handle_state(SYSCTL_HANDLER_ARGS) 1175 { 1176 device_t dev = arg1; 1177 1178 switch (dev->state) { 1179 case DS_NOTPRESENT: 1180 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1181 case DS_ALIVE: 1182 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1183 case DS_ATTACHED: 1184 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1185 case DS_BUSY: 1186 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1187 default: 1188 return (0); 1189 } 1190 } 1191 1192 static void 1193 device_register_oids(device_t dev) 1194 { 1195 struct sysctl_oid* oid; 1196 1197 oid = &dev->oid[0]; 1198 bzero(oid, sizeof(*oid)); 1199 oid->oid_parent = &sysctl__hw_devices_children; 1200 oid->oid_number = OID_AUTO; 1201 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1202 oid->oid_arg1 = &dev->oidlist[0]; 1203 oid->oid_arg2 = 0; 1204 oid->oid_name = dev->nameunit; 1205 oid->oid_handler = 0; 1206 oid->oid_fmt = "N"; 1207 SLIST_INIT(&dev->oidlist[0]); 1208 sysctl_register_oid(oid); 1209 1210 oid = &dev->oid[1]; 1211 bzero(oid, sizeof(*oid)); 1212 oid->oid_parent = &dev->oidlist[0]; 1213 oid->oid_number = OID_AUTO; 1214 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1215 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1216 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1217 oid->oid_name = "desc"; 1218 oid->oid_handler = sysctl_handle_string; 1219 oid->oid_fmt = "A"; 1220 sysctl_register_oid(oid); 1221 1222 oid = &dev->oid[2]; 1223 bzero(oid, sizeof(*oid)); 1224 oid->oid_parent = &dev->oidlist[0]; 1225 oid->oid_number = OID_AUTO; 1226 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1227 oid->oid_arg1 = dev; 1228 oid->oid_arg2 = 0; 1229 oid->oid_name = "children"; 1230 oid->oid_handler = sysctl_handle_children; 1231 oid->oid_fmt = "A"; 1232 sysctl_register_oid(oid); 1233 1234 oid = &dev->oid[3]; 1235 bzero(oid, sizeof(*oid)); 1236 oid->oid_parent = &dev->oidlist[0]; 1237 oid->oid_number = OID_AUTO; 1238 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1239 oid->oid_arg1 = dev; 1240 oid->oid_arg2 = 0; 1241 oid->oid_name = "state"; 1242 oid->oid_handler = sysctl_handle_state; 1243 oid->oid_fmt = "A"; 1244 sysctl_register_oid(oid); 1245 } 1246 1247 static void 1248 device_unregister_oids(device_t dev) 1249 { 1250 sysctl_unregister_oid(&dev->oid[0]); 1251 sysctl_unregister_oid(&dev->oid[1]); 1252 sysctl_unregister_oid(&dev->oid[2]); 1253 } 1254 1255 #endif 1256 1257 /*======================================*/ 1258 /* 1259 * Access functions for device resources. 1260 */ 1261 1262 /* Supplied by config(8) in ioconf.c */ 1263 extern struct config_device config_devtab[]; 1264 extern int devtab_count; 1265 1266 /* Runtime version */ 1267 struct config_device *devtab = config_devtab; 1268 1269 static int 1270 resource_new_name(const char *name, int unit) 1271 { 1272 struct config_device *new; 1273 1274 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, 1275 M_INTWAIT | M_ZERO); 1276 if (new == NULL) 1277 return(-1); 1278 if (devtab && devtab_count > 0) 1279 bcopy(devtab, new, devtab_count * sizeof(*new)); 1280 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 1281 if (new[devtab_count].name == NULL) { 1282 free(new, M_TEMP); 1283 return(-1); 1284 } 1285 strcpy(new[devtab_count].name, name); 1286 new[devtab_count].unit = unit; 1287 new[devtab_count].resource_count = 0; 1288 new[devtab_count].resources = NULL; 1289 if (devtab && devtab != config_devtab) 1290 free(devtab, M_TEMP); 1291 devtab = new; 1292 return devtab_count++; 1293 } 1294 1295 static int 1296 resource_new_resname(int j, const char *resname, resource_type type) 1297 { 1298 struct config_resource *new; 1299 int i; 1300 1301 i = devtab[j].resource_count; 1302 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 1303 if (new == NULL) 1304 return(-1); 1305 if (devtab[j].resources && i > 0) 1306 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1307 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 1308 if (new[i].name == NULL) { 1309 free(new, M_TEMP); 1310 return(-1); 1311 } 1312 strcpy(new[i].name, resname); 1313 new[i].type = type; 1314 if (devtab[j].resources) 1315 free(devtab[j].resources, M_TEMP); 1316 devtab[j].resources = new; 1317 devtab[j].resource_count = i + 1; 1318 return(i); 1319 } 1320 1321 static int 1322 resource_match_string(int i, const char *resname, const char *value) 1323 { 1324 int j; 1325 struct config_resource *res; 1326 1327 for (j = 0, res = devtab[i].resources; 1328 j < devtab[i].resource_count; j++, res++) 1329 if (!strcmp(res->name, resname) 1330 && res->type == RES_STRING 1331 && !strcmp(res->u.stringval, value)) 1332 return(j); 1333 return(-1); 1334 } 1335 1336 static int 1337 resource_find(const char *name, int unit, const char *resname, 1338 struct config_resource **result) 1339 { 1340 int i, j; 1341 struct config_resource *res; 1342 1343 /* 1344 * First check specific instances, then generic. 1345 */ 1346 for (i = 0; i < devtab_count; i++) { 1347 if (devtab[i].unit < 0) 1348 continue; 1349 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1350 res = devtab[i].resources; 1351 for (j = 0; j < devtab[i].resource_count; j++, res++) 1352 if (!strcmp(res->name, resname)) { 1353 *result = res; 1354 return(0); 1355 } 1356 } 1357 } 1358 for (i = 0; i < devtab_count; i++) { 1359 if (devtab[i].unit >= 0) 1360 continue; 1361 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1362 /* XXX if so, then the generic match does nothing */ 1363 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1364 res = devtab[i].resources; 1365 for (j = 0; j < devtab[i].resource_count; j++, res++) 1366 if (!strcmp(res->name, resname)) { 1367 *result = res; 1368 return(0); 1369 } 1370 } 1371 } 1372 return(ENOENT); 1373 } 1374 1375 int 1376 resource_int_value(const char *name, int unit, const char *resname, int *result) 1377 { 1378 int error; 1379 struct config_resource *res; 1380 1381 if ((error = resource_find(name, unit, resname, &res)) != 0) 1382 return(error); 1383 if (res->type != RES_INT) 1384 return(EFTYPE); 1385 *result = res->u.intval; 1386 return(0); 1387 } 1388 1389 int 1390 resource_long_value(const char *name, int unit, const char *resname, 1391 long *result) 1392 { 1393 int error; 1394 struct config_resource *res; 1395 1396 if ((error = resource_find(name, unit, resname, &res)) != 0) 1397 return(error); 1398 if (res->type != RES_LONG) 1399 return(EFTYPE); 1400 *result = res->u.longval; 1401 return(0); 1402 } 1403 1404 int 1405 resource_string_value(const char *name, int unit, const char *resname, 1406 char **result) 1407 { 1408 int error; 1409 struct config_resource *res; 1410 1411 if ((error = resource_find(name, unit, resname, &res)) != 0) 1412 return(error); 1413 if (res->type != RES_STRING) 1414 return(EFTYPE); 1415 *result = res->u.stringval; 1416 return(0); 1417 } 1418 1419 int 1420 resource_query_string(int i, const char *resname, const char *value) 1421 { 1422 if (i < 0) 1423 i = 0; 1424 else 1425 i = i + 1; 1426 for (; i < devtab_count; i++) 1427 if (resource_match_string(i, resname, value) >= 0) 1428 return(i); 1429 return(-1); 1430 } 1431 1432 int 1433 resource_locate(int i, const char *resname) 1434 { 1435 if (i < 0) 1436 i = 0; 1437 else 1438 i = i + 1; 1439 for (; i < devtab_count; i++) 1440 if (!strcmp(devtab[i].name, resname)) 1441 return(i); 1442 return(-1); 1443 } 1444 1445 int 1446 resource_count(void) 1447 { 1448 return(devtab_count); 1449 } 1450 1451 char * 1452 resource_query_name(int i) 1453 { 1454 return(devtab[i].name); 1455 } 1456 1457 int 1458 resource_query_unit(int i) 1459 { 1460 return(devtab[i].unit); 1461 } 1462 1463 static int 1464 resource_create(const char *name, int unit, const char *resname, 1465 resource_type type, struct config_resource **result) 1466 { 1467 int i, j; 1468 struct config_resource *res = NULL; 1469 1470 for (i = 0; i < devtab_count; i++) 1471 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1472 res = devtab[i].resources; 1473 break; 1474 } 1475 if (res == NULL) { 1476 i = resource_new_name(name, unit); 1477 if (i < 0) 1478 return(ENOMEM); 1479 res = devtab[i].resources; 1480 } 1481 for (j = 0; j < devtab[i].resource_count; j++, res++) 1482 if (!strcmp(res->name, resname)) { 1483 *result = res; 1484 return(0); 1485 } 1486 j = resource_new_resname(i, resname, type); 1487 if (j < 0) 1488 return(ENOMEM); 1489 res = &devtab[i].resources[j]; 1490 *result = res; 1491 return(0); 1492 } 1493 1494 int 1495 resource_set_int(const char *name, int unit, const char *resname, int value) 1496 { 1497 int error; 1498 struct config_resource *res; 1499 1500 error = resource_create(name, unit, resname, RES_INT, &res); 1501 if (error) 1502 return(error); 1503 if (res->type != RES_INT) 1504 return(EFTYPE); 1505 res->u.intval = value; 1506 return(0); 1507 } 1508 1509 int 1510 resource_set_long(const char *name, int unit, const char *resname, long value) 1511 { 1512 int error; 1513 struct config_resource *res; 1514 1515 error = resource_create(name, unit, resname, RES_LONG, &res); 1516 if (error) 1517 return(error); 1518 if (res->type != RES_LONG) 1519 return(EFTYPE); 1520 res->u.longval = value; 1521 return(0); 1522 } 1523 1524 int 1525 resource_set_string(const char *name, int unit, const char *resname, 1526 const char *value) 1527 { 1528 int error; 1529 struct config_resource *res; 1530 1531 error = resource_create(name, unit, resname, RES_STRING, &res); 1532 if (error) 1533 return(error); 1534 if (res->type != RES_STRING) 1535 return(EFTYPE); 1536 if (res->u.stringval) 1537 free(res->u.stringval, M_TEMP); 1538 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 1539 if (res->u.stringval == NULL) 1540 return(ENOMEM); 1541 strcpy(res->u.stringval, value); 1542 return(0); 1543 } 1544 1545 static void 1546 resource_cfgload(void *dummy __unused) 1547 { 1548 struct config_resource *res, *cfgres; 1549 int i, j; 1550 int error; 1551 char *name, *resname; 1552 int unit; 1553 resource_type type; 1554 char *stringval; 1555 int config_devtab_count; 1556 1557 config_devtab_count = devtab_count; 1558 devtab = NULL; 1559 devtab_count = 0; 1560 1561 for (i = 0; i < config_devtab_count; i++) { 1562 name = config_devtab[i].name; 1563 unit = config_devtab[i].unit; 1564 1565 for (j = 0; j < config_devtab[i].resource_count; j++) { 1566 cfgres = config_devtab[i].resources; 1567 resname = cfgres[j].name; 1568 type = cfgres[j].type; 1569 error = resource_create(name, unit, resname, type, 1570 &res); 1571 if (error) { 1572 printf("create resource %s%d: error %d\n", 1573 name, unit, error); 1574 continue; 1575 } 1576 if (res->type != type) { 1577 printf("type mismatch %s%d: %d != %d\n", 1578 name, unit, res->type, type); 1579 continue; 1580 } 1581 switch (type) { 1582 case RES_INT: 1583 res->u.intval = cfgres[j].u.intval; 1584 break; 1585 case RES_LONG: 1586 res->u.longval = cfgres[j].u.longval; 1587 break; 1588 case RES_STRING: 1589 if (res->u.stringval) 1590 free(res->u.stringval, M_TEMP); 1591 stringval = cfgres[j].u.stringval; 1592 res->u.stringval = malloc(strlen(stringval) + 1, 1593 M_TEMP, M_INTWAIT); 1594 if (res->u.stringval == NULL) 1595 break; 1596 strcpy(res->u.stringval, stringval); 1597 break; 1598 default: 1599 panic("unknown resource type %d", type); 1600 } 1601 } 1602 } 1603 } 1604 SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1605 1606 1607 /*======================================*/ 1608 /* 1609 * Some useful method implementations to make life easier for bus drivers. 1610 */ 1611 1612 void 1613 resource_list_init(struct resource_list *rl) 1614 { 1615 SLIST_INIT(rl); 1616 } 1617 1618 void 1619 resource_list_free(struct resource_list *rl) 1620 { 1621 struct resource_list_entry *rle; 1622 1623 while ((rle = SLIST_FIRST(rl)) != NULL) { 1624 if (rle->res) 1625 panic("resource_list_free: resource entry is busy"); 1626 SLIST_REMOVE_HEAD(rl, link); 1627 free(rle, M_BUS); 1628 } 1629 } 1630 1631 void 1632 resource_list_add(struct resource_list *rl, 1633 int type, int rid, 1634 u_long start, u_long end, u_long count) 1635 { 1636 struct resource_list_entry *rle; 1637 1638 rle = resource_list_find(rl, type, rid); 1639 if (rle == NULL) { 1640 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1641 M_INTWAIT); 1642 if (!rle) 1643 panic("resource_list_add: can't record entry"); 1644 SLIST_INSERT_HEAD(rl, rle, link); 1645 rle->type = type; 1646 rle->rid = rid; 1647 rle->res = NULL; 1648 } 1649 1650 if (rle->res) 1651 panic("resource_list_add: resource entry is busy"); 1652 1653 rle->start = start; 1654 rle->end = end; 1655 rle->count = count; 1656 } 1657 1658 struct resource_list_entry* 1659 resource_list_find(struct resource_list *rl, 1660 int type, int rid) 1661 { 1662 struct resource_list_entry *rle; 1663 1664 SLIST_FOREACH(rle, rl, link) 1665 if (rle->type == type && rle->rid == rid) 1666 return(rle); 1667 return(NULL); 1668 } 1669 1670 void 1671 resource_list_delete(struct resource_list *rl, 1672 int type, int rid) 1673 { 1674 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1675 1676 if (rle) { 1677 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1678 free(rle, M_BUS); 1679 } 1680 } 1681 1682 struct resource * 1683 resource_list_alloc(struct resource_list *rl, 1684 device_t bus, device_t child, 1685 int type, int *rid, 1686 u_long start, u_long end, 1687 u_long count, u_int flags) 1688 { 1689 struct resource_list_entry *rle = 0; 1690 int passthrough = (device_get_parent(child) != bus); 1691 int isdefault = (start == 0UL && end == ~0UL); 1692 1693 if (passthrough) { 1694 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1695 type, rid, 1696 start, end, count, flags)); 1697 } 1698 1699 rle = resource_list_find(rl, type, *rid); 1700 1701 if (!rle) 1702 return(0); /* no resource of that type/rid */ 1703 if (rle->res) 1704 panic("resource_list_alloc: resource entry is busy"); 1705 1706 if (isdefault) { 1707 start = rle->start; 1708 count = max(count, rle->count); 1709 end = max(rle->end, start + count - 1); 1710 } 1711 1712 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1713 type, rid, start, end, count, flags); 1714 1715 /* 1716 * Record the new range. 1717 */ 1718 if (rle->res) { 1719 rle->start = rman_get_start(rle->res); 1720 rle->end = rman_get_end(rle->res); 1721 rle->count = count; 1722 } 1723 1724 return(rle->res); 1725 } 1726 1727 int 1728 resource_list_release(struct resource_list *rl, 1729 device_t bus, device_t child, 1730 int type, int rid, struct resource *res) 1731 { 1732 struct resource_list_entry *rle = 0; 1733 int passthrough = (device_get_parent(child) != bus); 1734 int error; 1735 1736 if (passthrough) { 1737 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1738 type, rid, res)); 1739 } 1740 1741 rle = resource_list_find(rl, type, rid); 1742 1743 if (!rle) 1744 panic("resource_list_release: can't find resource"); 1745 if (!rle->res) 1746 panic("resource_list_release: resource entry is not busy"); 1747 1748 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1749 type, rid, res); 1750 if (error) 1751 return(error); 1752 1753 rle->res = NULL; 1754 return(0); 1755 } 1756 1757 int 1758 resource_list_print_type(struct resource_list *rl, const char *name, int type, 1759 const char *format) 1760 { 1761 struct resource_list_entry *rle; 1762 int printed, retval; 1763 1764 printed = 0; 1765 retval = 0; 1766 /* Yes, this is kinda cheating */ 1767 SLIST_FOREACH(rle, rl, link) { 1768 if (rle->type == type) { 1769 if (printed == 0) 1770 retval += printf(" %s ", name); 1771 else 1772 retval += printf(","); 1773 printed++; 1774 retval += printf(format, rle->start); 1775 if (rle->count > 1) { 1776 retval += printf("-"); 1777 retval += printf(format, rle->start + 1778 rle->count - 1); 1779 } 1780 } 1781 } 1782 return(retval); 1783 } 1784 1785 /* 1786 * Call DEVICE_IDENTIFY for each driver. 1787 */ 1788 int 1789 bus_generic_probe(device_t dev) 1790 { 1791 devclass_t dc = dev->devclass; 1792 driverlink_t dl; 1793 1794 TAILQ_FOREACH(dl, &dc->drivers, link) 1795 DEVICE_IDENTIFY(dl->driver, dev); 1796 1797 return(0); 1798 } 1799 1800 int 1801 bus_generic_attach(device_t dev) 1802 { 1803 device_t child; 1804 1805 TAILQ_FOREACH(child, &dev->children, link) 1806 device_probe_and_attach(child); 1807 1808 return(0); 1809 } 1810 1811 int 1812 bus_generic_detach(device_t dev) 1813 { 1814 device_t child; 1815 int error; 1816 1817 if (dev->state != DS_ATTACHED) 1818 return(EBUSY); 1819 1820 TAILQ_FOREACH(child, &dev->children, link) 1821 if ((error = device_detach(child)) != 0) 1822 return(error); 1823 1824 return 0; 1825 } 1826 1827 int 1828 bus_generic_shutdown(device_t dev) 1829 { 1830 device_t child; 1831 1832 TAILQ_FOREACH(child, &dev->children, link) 1833 device_shutdown(child); 1834 1835 return(0); 1836 } 1837 1838 int 1839 bus_generic_suspend(device_t dev) 1840 { 1841 int error; 1842 device_t child, child2; 1843 1844 TAILQ_FOREACH(child, &dev->children, link) { 1845 error = DEVICE_SUSPEND(child); 1846 if (error) { 1847 for (child2 = TAILQ_FIRST(&dev->children); 1848 child2 && child2 != child; 1849 child2 = TAILQ_NEXT(child2, link)) 1850 DEVICE_RESUME(child2); 1851 return(error); 1852 } 1853 } 1854 return(0); 1855 } 1856 1857 int 1858 bus_generic_resume(device_t dev) 1859 { 1860 device_t child; 1861 1862 TAILQ_FOREACH(child, &dev->children, link) 1863 DEVICE_RESUME(child); 1864 /* if resume fails, there's nothing we can usefully do... */ 1865 1866 return(0); 1867 } 1868 1869 int 1870 bus_print_child_header(device_t dev, device_t child) 1871 { 1872 int retval = 0; 1873 1874 if (device_get_desc(child)) 1875 retval += device_printf(child, "<%s>", device_get_desc(child)); 1876 else 1877 retval += printf("%s", device_get_nameunit(child)); 1878 if (bootverbose) { 1879 if (child->state != DS_ATTACHED) 1880 printf(" [tentative]"); 1881 else 1882 printf(" [attached!]"); 1883 } 1884 return(retval); 1885 } 1886 1887 int 1888 bus_print_child_footer(device_t dev, device_t child) 1889 { 1890 return(printf(" on %s\n", device_get_nameunit(dev))); 1891 } 1892 1893 int 1894 bus_generic_print_child(device_t dev, device_t child) 1895 { 1896 int retval = 0; 1897 1898 retval += bus_print_child_header(dev, child); 1899 retval += bus_print_child_footer(dev, child); 1900 1901 return(retval); 1902 } 1903 1904 int 1905 bus_generic_read_ivar(device_t dev, device_t child, int index, 1906 uintptr_t * result) 1907 { 1908 return(ENOENT); 1909 } 1910 1911 int 1912 bus_generic_write_ivar(device_t dev, device_t child, int index, 1913 uintptr_t value) 1914 { 1915 return(ENOENT); 1916 } 1917 1918 struct resource_list * 1919 bus_generic_get_resource_list(device_t dev, device_t child) 1920 { 1921 return(NULL); 1922 } 1923 1924 void 1925 bus_generic_driver_added(device_t dev, driver_t *driver) 1926 { 1927 device_t child; 1928 1929 DEVICE_IDENTIFY(driver, dev); 1930 TAILQ_FOREACH(child, &dev->children, link) 1931 if (child->state == DS_NOTPRESENT) 1932 device_probe_and_attach(child); 1933 } 1934 1935 int 1936 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1937 int flags, driver_intr_t *intr, void *arg, 1938 void **cookiep, lwkt_serialize_t serializer) 1939 { 1940 /* Propagate up the bus hierarchy until someone handles it. */ 1941 if (dev->parent) 1942 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 1943 intr, arg, cookiep, serializer)); 1944 else 1945 return(EINVAL); 1946 } 1947 1948 int 1949 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1950 void *cookie) 1951 { 1952 /* Propagate up the bus hierarchy until someone handles it. */ 1953 if (dev->parent) 1954 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1955 else 1956 return(EINVAL); 1957 } 1958 1959 int 1960 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 1961 { 1962 if (dev->parent) 1963 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 1964 else 1965 return(0); 1966 } 1967 1968 void 1969 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 1970 { 1971 if (dev->parent) 1972 BUS_ENABLE_INTR(dev->parent, child, cookie); 1973 } 1974 1975 struct resource * 1976 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1977 u_long start, u_long end, u_long count, u_int flags) 1978 { 1979 /* Propagate up the bus hierarchy until someone handles it. */ 1980 if (dev->parent) 1981 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1982 start, end, count, flags)); 1983 else 1984 return(NULL); 1985 } 1986 1987 int 1988 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1989 struct resource *r) 1990 { 1991 /* Propagate up the bus hierarchy until someone handles it. */ 1992 if (dev->parent) 1993 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 1994 else 1995 return(EINVAL); 1996 } 1997 1998 int 1999 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2000 struct resource *r) 2001 { 2002 /* Propagate up the bus hierarchy until someone handles it. */ 2003 if (dev->parent) 2004 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 2005 else 2006 return(EINVAL); 2007 } 2008 2009 int 2010 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2011 int rid, struct resource *r) 2012 { 2013 /* Propagate up the bus hierarchy until someone handles it. */ 2014 if (dev->parent) 2015 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2016 r)); 2017 else 2018 return(EINVAL); 2019 } 2020 2021 int 2022 bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, 2023 enum intr_polarity pol) 2024 { 2025 /* Propagate up the bus hierarchy until someone handles it. */ 2026 if (dev->parent) 2027 return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); 2028 else 2029 return(EINVAL); 2030 } 2031 2032 int 2033 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2034 u_long *startp, u_long *countp) 2035 { 2036 struct resource_list *rl = NULL; 2037 struct resource_list_entry *rle = NULL; 2038 2039 rl = BUS_GET_RESOURCE_LIST(dev, child); 2040 if (!rl) 2041 return(EINVAL); 2042 2043 rle = resource_list_find(rl, type, rid); 2044 if (!rle) 2045 return(ENOENT); 2046 2047 if (startp) 2048 *startp = rle->start; 2049 if (countp) 2050 *countp = rle->count; 2051 2052 return(0); 2053 } 2054 2055 int 2056 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2057 u_long start, u_long count) 2058 { 2059 struct resource_list *rl = NULL; 2060 2061 rl = BUS_GET_RESOURCE_LIST(dev, child); 2062 if (!rl) 2063 return(EINVAL); 2064 2065 resource_list_add(rl, type, rid, start, (start + count - 1), count); 2066 2067 return(0); 2068 } 2069 2070 void 2071 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2072 { 2073 struct resource_list *rl = NULL; 2074 2075 rl = BUS_GET_RESOURCE_LIST(dev, child); 2076 if (!rl) 2077 return; 2078 2079 resource_list_delete(rl, type, rid); 2080 } 2081 2082 int 2083 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2084 int rid, struct resource *r) 2085 { 2086 struct resource_list *rl = NULL; 2087 2088 rl = BUS_GET_RESOURCE_LIST(dev, child); 2089 if (!rl) 2090 return(EINVAL); 2091 2092 return(resource_list_release(rl, dev, child, type, rid, r)); 2093 } 2094 2095 struct resource * 2096 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2097 int *rid, u_long start, u_long end, u_long count, u_int flags) 2098 { 2099 struct resource_list *rl = NULL; 2100 2101 rl = BUS_GET_RESOURCE_LIST(dev, child); 2102 if (!rl) 2103 return(NULL); 2104 2105 return(resource_list_alloc(rl, dev, child, type, rid, 2106 start, end, count, flags)); 2107 } 2108 2109 int 2110 bus_generic_child_present(device_t bus, device_t child) 2111 { 2112 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2113 } 2114 2115 2116 /* 2117 * Some convenience functions to make it easier for drivers to use the 2118 * resource-management functions. All these really do is hide the 2119 * indirection through the parent's method table, making for slightly 2120 * less-wordy code. In the future, it might make sense for this code 2121 * to maintain some sort of a list of resources allocated by each device. 2122 */ 2123 struct resource * 2124 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2125 u_long count, u_int flags) 2126 { 2127 if (dev->parent == 0) 2128 return(0); 2129 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2130 count, flags)); 2131 } 2132 2133 int 2134 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2135 { 2136 if (dev->parent == 0) 2137 return(EINVAL); 2138 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2139 } 2140 2141 int 2142 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2143 { 2144 if (dev->parent == 0) 2145 return(EINVAL); 2146 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2147 } 2148 2149 int 2150 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2151 { 2152 if (dev->parent == 0) 2153 return(EINVAL); 2154 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2155 } 2156 2157 int 2158 bus_setup_intr(device_t dev, struct resource *r, int flags, 2159 driver_intr_t handler, void *arg, 2160 void **cookiep, lwkt_serialize_t serializer) 2161 { 2162 if (dev->parent == 0) 2163 return(EINVAL); 2164 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2165 cookiep, serializer)); 2166 } 2167 2168 int 2169 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2170 { 2171 if (dev->parent == 0) 2172 return(EINVAL); 2173 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2174 } 2175 2176 void 2177 bus_enable_intr(device_t dev, void *cookie) 2178 { 2179 if (dev->parent) 2180 BUS_ENABLE_INTR(dev->parent, dev, cookie); 2181 } 2182 2183 int 2184 bus_disable_intr(device_t dev, void *cookie) 2185 { 2186 if (dev->parent) 2187 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 2188 else 2189 return(0); 2190 } 2191 2192 int 2193 bus_set_resource(device_t dev, int type, int rid, 2194 u_long start, u_long count) 2195 { 2196 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2197 start, count)); 2198 } 2199 2200 int 2201 bus_get_resource(device_t dev, int type, int rid, 2202 u_long *startp, u_long *countp) 2203 { 2204 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2205 startp, countp)); 2206 } 2207 2208 u_long 2209 bus_get_resource_start(device_t dev, int type, int rid) 2210 { 2211 u_long start, count; 2212 int error; 2213 2214 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2215 &start, &count); 2216 if (error) 2217 return(0); 2218 return(start); 2219 } 2220 2221 u_long 2222 bus_get_resource_count(device_t dev, int type, int rid) 2223 { 2224 u_long start, count; 2225 int error; 2226 2227 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2228 &start, &count); 2229 if (error) 2230 return(0); 2231 return(count); 2232 } 2233 2234 void 2235 bus_delete_resource(device_t dev, int type, int rid) 2236 { 2237 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2238 } 2239 2240 int 2241 bus_child_present(device_t child) 2242 { 2243 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2244 } 2245 2246 int 2247 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2248 { 2249 device_t parent; 2250 2251 parent = device_get_parent(child); 2252 if (parent == NULL) { 2253 *buf = '\0'; 2254 return (0); 2255 } 2256 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2257 } 2258 2259 int 2260 bus_child_location_str(device_t child, char *buf, size_t buflen) 2261 { 2262 device_t parent; 2263 2264 parent = device_get_parent(child); 2265 if (parent == NULL) { 2266 *buf = '\0'; 2267 return (0); 2268 } 2269 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2270 } 2271 2272 static int 2273 root_print_child(device_t dev, device_t child) 2274 { 2275 return(0); 2276 } 2277 2278 static int 2279 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2280 void **cookiep, lwkt_serialize_t serializer) 2281 { 2282 /* 2283 * If an interrupt mapping gets to here something bad has happened. 2284 */ 2285 panic("root_setup_intr"); 2286 } 2287 2288 /* 2289 * If we get here, assume that the device is permanant and really is 2290 * present in the system. Removable bus drivers are expected to intercept 2291 * this call long before it gets here. We return -1 so that drivers that 2292 * really care can check vs -1 or some ERRNO returned higher in the food 2293 * chain. 2294 */ 2295 static int 2296 root_child_present(device_t dev, device_t child) 2297 { 2298 return(-1); 2299 } 2300 2301 /* 2302 * XXX NOTE! other defaults may be set in bus_if.m 2303 */ 2304 static kobj_method_t root_methods[] = { 2305 /* Device interface */ 2306 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2307 KOBJMETHOD(device_suspend, bus_generic_suspend), 2308 KOBJMETHOD(device_resume, bus_generic_resume), 2309 2310 /* Bus interface */ 2311 KOBJMETHOD(bus_print_child, root_print_child), 2312 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2313 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2314 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2315 KOBJMETHOD(bus_child_present, root_child_present), 2316 2317 { 0, 0 } 2318 }; 2319 2320 static driver_t root_driver = { 2321 "root", 2322 root_methods, 2323 1, /* no softc */ 2324 }; 2325 2326 device_t root_bus; 2327 devclass_t root_devclass; 2328 2329 static int 2330 root_bus_module_handler(module_t mod, int what, void* arg) 2331 { 2332 switch (what) { 2333 case MOD_LOAD: 2334 root_bus = make_device(NULL, "root", 0); 2335 root_bus->desc = "System root bus"; 2336 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2337 root_bus->driver = &root_driver; 2338 root_bus->state = DS_ATTACHED; 2339 root_devclass = devclass_find_internal("root", NULL, FALSE); 2340 return(0); 2341 2342 case MOD_SHUTDOWN: 2343 device_shutdown(root_bus); 2344 return(0); 2345 default: 2346 return(0); 2347 } 2348 } 2349 2350 static moduledata_t root_bus_mod = { 2351 "rootbus", 2352 root_bus_module_handler, 2353 0 2354 }; 2355 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2356 2357 void 2358 root_bus_configure(void) 2359 { 2360 device_t dev; 2361 2362 PDEBUG((".")); 2363 2364 TAILQ_FOREACH(dev, &root_bus->children, link) 2365 device_probe_and_attach(dev); 2366 } 2367 2368 int 2369 driver_module_handler(module_t mod, int what, void *arg) 2370 { 2371 int error; 2372 struct driver_module_data *dmd; 2373 devclass_t bus_devclass; 2374 kobj_class_t driver; 2375 const char *parentname; 2376 2377 dmd = (struct driver_module_data *)arg; 2378 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 2379 error = 0; 2380 2381 switch (what) { 2382 case MOD_LOAD: 2383 if (dmd->dmd_chainevh) 2384 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2385 2386 driver = dmd->dmd_driver; 2387 PDEBUG(("Loading module: driver %s on bus %s", 2388 DRIVERNAME(driver), dmd->dmd_busname)); 2389 error = devclass_add_driver(bus_devclass, driver); 2390 if (error) 2391 break; 2392 2393 /* 2394 * If the driver has any base classes, make the 2395 * devclass inherit from the devclass of the driver's 2396 * first base class. This will allow the system to 2397 * search for drivers in both devclasses for children 2398 * of a device using this driver. 2399 */ 2400 if (driver->baseclasses) 2401 parentname = driver->baseclasses[0]->name; 2402 else 2403 parentname = NULL; 2404 *dmd->dmd_devclass = devclass_find_internal(driver->name, 2405 parentname, TRUE); 2406 break; 2407 2408 case MOD_UNLOAD: 2409 PDEBUG(("Unloading module: driver %s from bus %s", 2410 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 2411 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 2412 2413 if (!error && dmd->dmd_chainevh) 2414 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2415 break; 2416 } 2417 2418 return (error); 2419 } 2420 2421 #ifdef BUS_DEBUG 2422 2423 /* 2424 * The _short versions avoid iteration by not calling anything that prints 2425 * more than oneliners. I love oneliners. 2426 */ 2427 2428 static void 2429 print_device_short(device_t dev, int indent) 2430 { 2431 if (!dev) 2432 return; 2433 2434 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2435 dev->unit, dev->desc, 2436 (dev->parent? "":"no "), 2437 (TAILQ_EMPTY(&dev->children)? "no ":""), 2438 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2439 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2440 (dev->flags&DF_WILDCARD? "wildcard,":""), 2441 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2442 (dev->ivars? "":"no "), 2443 (dev->softc? "":"no "), 2444 dev->busy)); 2445 } 2446 2447 static void 2448 print_device(device_t dev, int indent) 2449 { 2450 if (!dev) 2451 return; 2452 2453 print_device_short(dev, indent); 2454 2455 indentprintf(("Parent:\n")); 2456 print_device_short(dev->parent, indent+1); 2457 indentprintf(("Driver:\n")); 2458 print_driver_short(dev->driver, indent+1); 2459 indentprintf(("Devclass:\n")); 2460 print_devclass_short(dev->devclass, indent+1); 2461 } 2462 2463 /* 2464 * Print the device and all its children (indented). 2465 */ 2466 void 2467 print_device_tree_short(device_t dev, int indent) 2468 { 2469 device_t child; 2470 2471 if (!dev) 2472 return; 2473 2474 print_device_short(dev, indent); 2475 2476 TAILQ_FOREACH(child, &dev->children, link) 2477 print_device_tree_short(child, indent+1); 2478 } 2479 2480 /* 2481 * Print the device and all its children (indented). 2482 */ 2483 void 2484 print_device_tree(device_t dev, int indent) 2485 { 2486 device_t child; 2487 2488 if (!dev) 2489 return; 2490 2491 print_device(dev, indent); 2492 2493 TAILQ_FOREACH(child, &dev->children, link) 2494 print_device_tree(child, indent+1); 2495 } 2496 2497 static void 2498 print_driver_short(driver_t *driver, int indent) 2499 { 2500 if (!driver) 2501 return; 2502 2503 indentprintf(("driver %s: softc size = %d\n", 2504 driver->name, driver->size)); 2505 } 2506 2507 static void 2508 print_driver(driver_t *driver, int indent) 2509 { 2510 if (!driver) 2511 return; 2512 2513 print_driver_short(driver, indent); 2514 } 2515 2516 2517 static void 2518 print_driver_list(driver_list_t drivers, int indent) 2519 { 2520 driverlink_t driver; 2521 2522 TAILQ_FOREACH(driver, &drivers, link) 2523 print_driver(driver->driver, indent); 2524 } 2525 2526 static void 2527 print_devclass_short(devclass_t dc, int indent) 2528 { 2529 if (!dc) 2530 return; 2531 2532 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2533 } 2534 2535 static void 2536 print_devclass(devclass_t dc, int indent) 2537 { 2538 int i; 2539 2540 if (!dc) 2541 return; 2542 2543 print_devclass_short(dc, indent); 2544 indentprintf(("Drivers:\n")); 2545 print_driver_list(dc->drivers, indent+1); 2546 2547 indentprintf(("Devices:\n")); 2548 for (i = 0; i < dc->maxunit; i++) 2549 if (dc->devices[i]) 2550 print_device(dc->devices[i], indent+1); 2551 } 2552 2553 void 2554 print_devclass_list_short(void) 2555 { 2556 devclass_t dc; 2557 2558 printf("Short listing of devclasses, drivers & devices:\n"); 2559 TAILQ_FOREACH(dc, &devclasses, link) { 2560 print_devclass_short(dc, 0); 2561 } 2562 } 2563 2564 void 2565 print_devclass_list(void) 2566 { 2567 devclass_t dc; 2568 2569 printf("Full listing of devclasses, drivers & devices:\n"); 2570 TAILQ_FOREACH(dc, &devclasses, link) { 2571 print_devclass(dc, 0); 2572 } 2573 } 2574 2575 #endif 2576 2577 /* 2578 * Check to see if a device is disabled via a disabled hint. 2579 */ 2580 int 2581 resource_disabled(const char *name, int unit) 2582 { 2583 int error, value; 2584 2585 error = resource_int_value(name, unit, "disabled", &value); 2586 if (error) 2587 return(0); 2588 return(value); 2589 } 2590