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 1.29 2005/10/30 04:41:15 dillon 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 device_t 156 devclass_find_unit(const char *classname, int unit) 157 { 158 devclass_t dc; 159 160 if ((dc = devclass_find(classname)) != NULL) 161 return(devclass_get_device(dc, unit)); 162 return (NULL); 163 } 164 165 int 166 devclass_add_driver(devclass_t dc, driver_t *driver) 167 { 168 driverlink_t dl; 169 device_t dev; 170 int i; 171 172 PDEBUG(("%s", DRIVERNAME(driver))); 173 174 dl = malloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 175 if (!dl) 176 return(ENOMEM); 177 178 /* 179 * Compile the driver's methods. Also increase the reference count 180 * so that the class doesn't get freed when the last instance 181 * goes. This means we can safely use static methods and avoids a 182 * double-free in devclass_delete_driver. 183 */ 184 kobj_class_instantiate(driver); 185 186 /* 187 * Make sure the devclass which the driver is implementing exists. 188 */ 189 devclass_find_internal(driver->name, NULL, TRUE); 190 191 dl->driver = driver; 192 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 193 194 /* 195 * Call BUS_DRIVER_ADDED for any existing busses in this class, 196 * but only if the bus has already been attached (otherwise we 197 * might probe too early). 198 * 199 * This is what will cause a newly loaded module to be associated 200 * with hardware. bus_generic_driver_added() is typically what ends 201 * up being called. 202 */ 203 for (i = 0; i < dc->maxunit; i++) { 204 if ((dev = dc->devices[i]) != NULL) { 205 if (dev->state == DS_ATTACHED) 206 BUS_DRIVER_ADDED(dev, driver); 207 } 208 } 209 210 return(0); 211 } 212 213 int 214 devclass_delete_driver(devclass_t busclass, driver_t *driver) 215 { 216 devclass_t dc = devclass_find(driver->name); 217 driverlink_t dl; 218 device_t dev; 219 int i; 220 int error; 221 222 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 223 224 if (!dc) 225 return(0); 226 227 /* 228 * Find the link structure in the bus' list of drivers. 229 */ 230 TAILQ_FOREACH(dl, &busclass->drivers, link) 231 if (dl->driver == driver) 232 break; 233 234 if (!dl) { 235 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 236 return(ENOENT); 237 } 238 239 /* 240 * Disassociate from any devices. We iterate through all the 241 * devices in the devclass of the driver and detach any which are 242 * using the driver and which have a parent in the devclass which 243 * we are deleting from. 244 * 245 * Note that since a driver can be in multiple devclasses, we 246 * should not detach devices which are not children of devices in 247 * the affected devclass. 248 */ 249 for (i = 0; i < dc->maxunit; i++) 250 if (dc->devices[i]) { 251 dev = dc->devices[i]; 252 if (dev->driver == driver && dev->parent && 253 dev->parent->devclass == busclass) { 254 if ((error = device_detach(dev)) != 0) 255 return(error); 256 device_set_driver(dev, NULL); 257 } 258 } 259 260 TAILQ_REMOVE(&busclass->drivers, dl, link); 261 free(dl, M_BUS); 262 263 kobj_class_uninstantiate(driver); 264 265 return(0); 266 } 267 268 static driverlink_t 269 devclass_find_driver_internal(devclass_t dc, const char *classname) 270 { 271 driverlink_t dl; 272 273 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 274 275 TAILQ_FOREACH(dl, &dc->drivers, link) 276 if (!strcmp(dl->driver->name, classname)) 277 return(dl); 278 279 PDEBUG(("not found")); 280 return(NULL); 281 } 282 283 kobj_class_t 284 devclass_find_driver(devclass_t dc, const char *classname) 285 { 286 driverlink_t dl; 287 288 dl = devclass_find_driver_internal(dc, classname); 289 if (dl) 290 return(dl->driver); 291 else 292 return(NULL); 293 } 294 295 const char * 296 devclass_get_name(devclass_t dc) 297 { 298 return(dc->name); 299 } 300 301 device_t 302 devclass_get_device(devclass_t dc, int unit) 303 { 304 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 305 return(NULL); 306 return(dc->devices[unit]); 307 } 308 309 void * 310 devclass_get_softc(devclass_t dc, int unit) 311 { 312 device_t dev; 313 314 dev = devclass_get_device(dc, unit); 315 if (!dev) 316 return(NULL); 317 318 return(device_get_softc(dev)); 319 } 320 321 int 322 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 323 { 324 int i; 325 int count; 326 device_t *list; 327 328 count = 0; 329 for (i = 0; i < dc->maxunit; i++) 330 if (dc->devices[i]) 331 count++; 332 333 list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 334 if (list == NULL) 335 return(ENOMEM); 336 337 count = 0; 338 for (i = 0; i < dc->maxunit; i++) 339 if (dc->devices[i]) { 340 list[count] = dc->devices[i]; 341 count++; 342 } 343 344 *devlistp = list; 345 *devcountp = count; 346 347 return(0); 348 } 349 350 int 351 devclass_get_maxunit(devclass_t dc) 352 { 353 return(dc->maxunit); 354 } 355 356 void 357 devclass_set_parent(devclass_t dc, devclass_t pdc) 358 { 359 dc->parent = pdc; 360 } 361 362 devclass_t 363 devclass_get_parent(devclass_t dc) 364 { 365 return(dc->parent); 366 } 367 368 static int 369 devclass_alloc_unit(devclass_t dc, int *unitp) 370 { 371 int unit = *unitp; 372 373 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 374 375 /* If we have been given a wired unit number, check for existing device */ 376 if (unit != -1) { 377 if (unit >= 0 && unit < dc->maxunit && 378 dc->devices[unit] != NULL) { 379 if (bootverbose) 380 printf("%s-: %s%d exists, using next available unit number\n", 381 dc->name, dc->name, unit); 382 /* find the next available slot */ 383 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 384 ; 385 } 386 } else { 387 /* Unwired device, find the next available slot for it */ 388 unit = 0; 389 while (unit < dc->maxunit && dc->devices[unit] != NULL) 390 unit++; 391 } 392 393 /* 394 * We've selected a unit beyond the length of the table, so let's 395 * extend the table to make room for all units up to and including 396 * this one. 397 */ 398 if (unit >= dc->maxunit) { 399 device_t *newlist; 400 int newsize; 401 402 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 403 newlist = malloc(sizeof(device_t) * newsize, M_BUS, 404 M_INTWAIT | M_ZERO); 405 if (newlist == NULL) 406 return(ENOMEM); 407 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 408 if (dc->devices) 409 free(dc->devices, M_BUS); 410 dc->devices = newlist; 411 dc->maxunit = newsize; 412 } 413 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 414 415 *unitp = unit; 416 return(0); 417 } 418 419 static int 420 devclass_add_device(devclass_t dc, device_t dev) 421 { 422 int buflen, error; 423 424 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 425 426 buflen = strlen(dc->name) + 5; 427 dev->nameunit = malloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 428 if (!dev->nameunit) 429 return(ENOMEM); 430 431 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 432 free(dev->nameunit, M_BUS); 433 dev->nameunit = NULL; 434 return(error); 435 } 436 dc->devices[dev->unit] = dev; 437 dev->devclass = dc; 438 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 439 440 #ifdef DEVICE_SYSCTLS 441 device_register_oids(dev); 442 #endif 443 444 return(0); 445 } 446 447 static int 448 devclass_delete_device(devclass_t dc, device_t dev) 449 { 450 if (!dc || !dev) 451 return(0); 452 453 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 454 455 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 456 panic("devclass_delete_device: inconsistent device class"); 457 dc->devices[dev->unit] = NULL; 458 if (dev->flags & DF_WILDCARD) 459 dev->unit = -1; 460 dev->devclass = NULL; 461 free(dev->nameunit, M_BUS); 462 dev->nameunit = NULL; 463 464 #ifdef DEVICE_SYSCTLS 465 device_unregister_oids(dev); 466 #endif 467 468 return(0); 469 } 470 471 static device_t 472 make_device(device_t parent, const char *name, int unit) 473 { 474 device_t dev; 475 devclass_t dc; 476 477 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 478 479 if (name != NULL) { 480 dc = devclass_find_internal(name, NULL, TRUE); 481 if (!dc) { 482 printf("make_device: can't find device class %s\n", name); 483 return(NULL); 484 } 485 } else 486 dc = NULL; 487 488 dev = malloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); 489 if (!dev) 490 return(0); 491 492 dev->parent = parent; 493 TAILQ_INIT(&dev->children); 494 kobj_init((kobj_t) dev, &null_class); 495 dev->driver = NULL; 496 dev->devclass = NULL; 497 dev->unit = unit; 498 dev->nameunit = NULL; 499 dev->desc = NULL; 500 dev->busy = 0; 501 dev->devflags = 0; 502 dev->flags = DF_ENABLED; 503 dev->order = 0; 504 if (unit == -1) 505 dev->flags |= DF_WILDCARD; 506 if (name) { 507 dev->flags |= DF_FIXEDCLASS; 508 if (devclass_add_device(dc, dev) != 0) { 509 kobj_delete((kobj_t)dev, M_BUS); 510 return(NULL); 511 } 512 } 513 dev->ivars = NULL; 514 dev->softc = NULL; 515 516 dev->state = DS_NOTPRESENT; 517 518 return(dev); 519 } 520 521 static int 522 device_print_child(device_t dev, device_t child) 523 { 524 int retval = 0; 525 526 if (device_is_alive(child)) 527 retval += BUS_PRINT_CHILD(dev, child); 528 else 529 retval += device_printf(child, " not found\n"); 530 531 return(retval); 532 } 533 534 device_t 535 device_add_child(device_t dev, const char *name, int unit) 536 { 537 return device_add_child_ordered(dev, 0, name, unit); 538 } 539 540 device_t 541 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 542 { 543 device_t child; 544 device_t place; 545 546 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 547 order, unit)); 548 549 child = make_device(dev, name, unit); 550 if (child == NULL) 551 return child; 552 child->order = order; 553 554 TAILQ_FOREACH(place, &dev->children, link) 555 if (place->order > order) 556 break; 557 558 if (place) { 559 /* 560 * The device 'place' is the first device whose order is 561 * greater than the new child. 562 */ 563 TAILQ_INSERT_BEFORE(place, child, link); 564 } else { 565 /* 566 * The new child's order is greater or equal to the order of 567 * any existing device. Add the child to the tail of the list. 568 */ 569 TAILQ_INSERT_TAIL(&dev->children, child, link); 570 } 571 572 return(child); 573 } 574 575 int 576 device_delete_child(device_t dev, device_t child) 577 { 578 int error; 579 device_t grandchild; 580 581 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 582 583 /* remove children first */ 584 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 585 error = device_delete_child(child, grandchild); 586 if (error) 587 return(error); 588 } 589 590 if ((error = device_detach(child)) != 0) 591 return(error); 592 if (child->devclass) 593 devclass_delete_device(child->devclass, child); 594 TAILQ_REMOVE(&dev->children, child, link); 595 device_set_desc(child, NULL); 596 kobj_delete((kobj_t)child, M_BUS); 597 598 return(0); 599 } 600 601 /* 602 * Find only devices attached to this bus. 603 */ 604 device_t 605 device_find_child(device_t dev, const char *classname, int unit) 606 { 607 devclass_t dc; 608 device_t child; 609 610 dc = devclass_find(classname); 611 if (!dc) 612 return(NULL); 613 614 child = devclass_get_device(dc, unit); 615 if (child && child->parent == dev) 616 return(child); 617 return(NULL); 618 } 619 620 static driverlink_t 621 first_matching_driver(devclass_t dc, device_t dev) 622 { 623 if (dev->devclass) 624 return(devclass_find_driver_internal(dc, dev->devclass->name)); 625 else 626 return(TAILQ_FIRST(&dc->drivers)); 627 } 628 629 static driverlink_t 630 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 631 { 632 if (dev->devclass) { 633 driverlink_t dl; 634 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 635 if (!strcmp(dev->devclass->name, dl->driver->name)) 636 return(dl); 637 return(NULL); 638 } else 639 return(TAILQ_NEXT(last, link)); 640 } 641 642 static int 643 device_probe_child(device_t dev, device_t child) 644 { 645 devclass_t dc; 646 driverlink_t best = 0; 647 driverlink_t dl; 648 int result, pri = 0; 649 int hasclass = (child->devclass != 0); 650 651 dc = dev->devclass; 652 if (!dc) 653 panic("device_probe_child: parent device has no devclass"); 654 655 if (child->state == DS_ALIVE) 656 return(0); 657 658 for (; dc; dc = dc->parent) { 659 for (dl = first_matching_driver(dc, child); dl; 660 dl = next_matching_driver(dc, child, dl)) { 661 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 662 device_set_driver(child, dl->driver); 663 if (!hasclass) 664 device_set_devclass(child, dl->driver->name); 665 result = DEVICE_PROBE(child); 666 if (!hasclass) 667 device_set_devclass(child, 0); 668 669 /* 670 * If the driver returns SUCCESS, there can be 671 * no higher match for this device. 672 */ 673 if (result == 0) { 674 best = dl; 675 pri = 0; 676 break; 677 } 678 679 /* 680 * The driver returned an error so it 681 * certainly doesn't match. 682 */ 683 if (result > 0) { 684 device_set_driver(child, 0); 685 continue; 686 } 687 688 /* 689 * A priority lower than SUCCESS, remember the 690 * best matching driver. Initialise the value 691 * of pri for the first match. 692 */ 693 if (best == 0 || result > pri) { 694 best = dl; 695 pri = result; 696 continue; 697 } 698 } 699 /* 700 * If we have unambiguous match in this devclass, 701 * don't look in the parent. 702 */ 703 if (best && pri == 0) 704 break; 705 } 706 707 /* 708 * If we found a driver, change state and initialise the devclass. 709 */ 710 if (best) { 711 if (!child->devclass) 712 device_set_devclass(child, best->driver->name); 713 device_set_driver(child, best->driver); 714 if (pri < 0) { 715 /* 716 * A bit bogus. Call the probe method again to make 717 * sure that we have the right description. 718 */ 719 DEVICE_PROBE(child); 720 } 721 child->state = DS_ALIVE; 722 return(0); 723 } 724 725 return(ENXIO); 726 } 727 728 device_t 729 device_get_parent(device_t dev) 730 { 731 return dev->parent; 732 } 733 734 int 735 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 736 { 737 int count; 738 device_t child; 739 device_t *list; 740 741 count = 0; 742 TAILQ_FOREACH(child, &dev->children, link) 743 count++; 744 745 list = malloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 746 if (!list) 747 return(ENOMEM); 748 749 count = 0; 750 TAILQ_FOREACH(child, &dev->children, link) { 751 list[count] = child; 752 count++; 753 } 754 755 *devlistp = list; 756 *devcountp = count; 757 758 return(0); 759 } 760 761 driver_t * 762 device_get_driver(device_t dev) 763 { 764 return(dev->driver); 765 } 766 767 devclass_t 768 device_get_devclass(device_t dev) 769 { 770 return(dev->devclass); 771 } 772 773 const char * 774 device_get_name(device_t dev) 775 { 776 if (dev->devclass) 777 return devclass_get_name(dev->devclass); 778 return(NULL); 779 } 780 781 const char * 782 device_get_nameunit(device_t dev) 783 { 784 return(dev->nameunit); 785 } 786 787 int 788 device_get_unit(device_t dev) 789 { 790 return(dev->unit); 791 } 792 793 const char * 794 device_get_desc(device_t dev) 795 { 796 return(dev->desc); 797 } 798 799 uint32_t 800 device_get_flags(device_t dev) 801 { 802 return(dev->devflags); 803 } 804 805 int 806 device_print_prettyname(device_t dev) 807 { 808 const char *name = device_get_name(dev); 809 810 if (name == 0) 811 return printf("unknown: "); 812 else 813 return printf("%s%d: ", name, device_get_unit(dev)); 814 } 815 816 int 817 device_printf(device_t dev, const char * fmt, ...) 818 { 819 __va_list ap; 820 int retval; 821 822 retval = device_print_prettyname(dev); 823 __va_start(ap, fmt); 824 retval += vprintf(fmt, ap); 825 __va_end(ap); 826 return retval; 827 } 828 829 static void 830 device_set_desc_internal(device_t dev, const char* desc, int copy) 831 { 832 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 833 free(dev->desc, M_BUS); 834 dev->flags &= ~DF_DESCMALLOCED; 835 dev->desc = NULL; 836 } 837 838 if (copy && desc) { 839 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 840 if (dev->desc) { 841 strcpy(dev->desc, desc); 842 dev->flags |= DF_DESCMALLOCED; 843 } 844 } else 845 /* Avoid a -Wcast-qual warning */ 846 dev->desc = (char *)(uintptr_t) desc; 847 848 #ifdef DEVICE_SYSCTLS 849 { 850 struct sysctl_oid *oid = &dev->oid[1]; 851 oid->oid_arg1 = dev->desc ? dev->desc : ""; 852 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 853 } 854 #endif 855 } 856 857 void 858 device_set_desc(device_t dev, const char* desc) 859 { 860 device_set_desc_internal(dev, desc, FALSE); 861 } 862 863 void 864 device_set_desc_copy(device_t dev, const char* desc) 865 { 866 device_set_desc_internal(dev, desc, TRUE); 867 } 868 869 void 870 device_set_flags(device_t dev, uint32_t flags) 871 { 872 dev->devflags = flags; 873 } 874 875 void * 876 device_get_softc(device_t dev) 877 { 878 return dev->softc; 879 } 880 881 void 882 device_set_softc(device_t dev, void *softc) 883 { 884 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 885 free(dev->softc, M_BUS); 886 dev->softc = softc; 887 if (dev->softc) 888 dev->flags |= DF_EXTERNALSOFTC; 889 else 890 dev->flags &= ~DF_EXTERNALSOFTC; 891 } 892 893 void * 894 device_get_ivars(device_t dev) 895 { 896 return dev->ivars; 897 } 898 899 void 900 device_set_ivars(device_t dev, void * ivars) 901 { 902 if (!dev) 903 return; 904 905 dev->ivars = ivars; 906 } 907 908 device_state_t 909 device_get_state(device_t dev) 910 { 911 return(dev->state); 912 } 913 914 void 915 device_enable(device_t dev) 916 { 917 dev->flags |= DF_ENABLED; 918 } 919 920 void 921 device_disable(device_t dev) 922 { 923 dev->flags &= ~DF_ENABLED; 924 } 925 926 /* 927 * YYY cannot block 928 */ 929 void 930 device_busy(device_t dev) 931 { 932 if (dev->state < DS_ATTACHED) 933 panic("device_busy: called for unattached device"); 934 if (dev->busy == 0 && dev->parent) 935 device_busy(dev->parent); 936 dev->busy++; 937 dev->state = DS_BUSY; 938 } 939 940 /* 941 * YYY cannot block 942 */ 943 void 944 device_unbusy(device_t dev) 945 { 946 if (dev->state != DS_BUSY) 947 panic("device_unbusy: called for non-busy device"); 948 dev->busy--; 949 if (dev->busy == 0) { 950 if (dev->parent) 951 device_unbusy(dev->parent); 952 dev->state = DS_ATTACHED; 953 } 954 } 955 956 void 957 device_quiet(device_t dev) 958 { 959 dev->flags |= DF_QUIET; 960 } 961 962 void 963 device_verbose(device_t dev) 964 { 965 dev->flags &= ~DF_QUIET; 966 } 967 968 int 969 device_is_quiet(device_t dev) 970 { 971 return((dev->flags & DF_QUIET) != 0); 972 } 973 974 int 975 device_is_enabled(device_t dev) 976 { 977 return((dev->flags & DF_ENABLED) != 0); 978 } 979 980 int 981 device_is_alive(device_t dev) 982 { 983 return(dev->state >= DS_ALIVE); 984 } 985 986 int 987 device_is_attached(device_t dev) 988 { 989 return(dev->state >= DS_ATTACHED); 990 } 991 992 int 993 device_set_devclass(device_t dev, const char *classname) 994 { 995 devclass_t dc; 996 997 if (!classname) { 998 if (dev->devclass) 999 devclass_delete_device(dev->devclass, dev); 1000 return(0); 1001 } 1002 1003 if (dev->devclass) { 1004 printf("device_set_devclass: device class already set\n"); 1005 return(EINVAL); 1006 } 1007 1008 dc = devclass_find_internal(classname, NULL, TRUE); 1009 if (!dc) 1010 return(ENOMEM); 1011 1012 return(devclass_add_device(dc, dev)); 1013 } 1014 1015 int 1016 device_set_driver(device_t dev, driver_t *driver) 1017 { 1018 if (dev->state >= DS_ATTACHED) 1019 return(EBUSY); 1020 1021 if (dev->driver == driver) 1022 return(0); 1023 1024 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1025 free(dev->softc, M_BUS); 1026 dev->softc = NULL; 1027 } 1028 kobj_delete((kobj_t) dev, 0); 1029 dev->driver = driver; 1030 if (driver) { 1031 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1032 if (!(dev->flags & DF_EXTERNALSOFTC)) { 1033 dev->softc = malloc(driver->size, M_BUS, 1034 M_INTWAIT | M_ZERO); 1035 if (!dev->softc) { 1036 kobj_delete((kobj_t)dev, 0); 1037 kobj_init((kobj_t) dev, &null_class); 1038 dev->driver = NULL; 1039 return(ENOMEM); 1040 } 1041 } 1042 } else 1043 kobj_init((kobj_t) dev, &null_class); 1044 return(0); 1045 } 1046 1047 int 1048 device_probe_and_attach(device_t dev) 1049 { 1050 device_t bus = dev->parent; 1051 int error = 0; 1052 int hasclass = (dev->devclass != 0); 1053 1054 if (dev->state >= DS_ALIVE) 1055 return(0); 1056 1057 if ((dev->flags & DF_ENABLED) == 0) { 1058 if (bootverbose) { 1059 device_print_prettyname(dev); 1060 printf("not probed (disabled)\n"); 1061 } 1062 return(0); 1063 } 1064 1065 error = device_probe_child(bus, dev); 1066 if (error) { 1067 if (!(dev->flags & DF_DONENOMATCH)) { 1068 BUS_PROBE_NOMATCH(bus, dev); 1069 dev->flags |= DF_DONENOMATCH; 1070 } 1071 return(error); 1072 } 1073 1074 /* 1075 * Output the exact device chain prior to the attach in case the 1076 * system locks up during attach, and generate the full info after 1077 * the attach so correct irq and other information is displayed. 1078 */ 1079 if (bootverbose && !device_is_quiet(dev)) { 1080 device_t tmp; 1081 1082 printf("%s", device_get_nameunit(dev)); 1083 for (tmp = dev->parent; tmp; tmp = tmp->parent) 1084 printf(".%s", device_get_nameunit(tmp)); 1085 printf("\n"); 1086 } 1087 if (!device_is_quiet(dev)) 1088 device_print_child(bus, dev); 1089 error = DEVICE_ATTACH(dev); 1090 if (error == 0) { 1091 dev->state = DS_ATTACHED; 1092 if (bootverbose && !device_is_quiet(dev)) 1093 device_print_child(bus, dev); 1094 } else { 1095 printf("device_probe_and_attach: %s%d attach returned %d\n", 1096 dev->driver->name, dev->unit, error); 1097 /* Unset the class that was set in device_probe_child */ 1098 if (!hasclass) 1099 device_set_devclass(dev, 0); 1100 device_set_driver(dev, NULL); 1101 dev->state = DS_NOTPRESENT; 1102 } 1103 1104 return(error); 1105 } 1106 1107 int 1108 device_detach(device_t dev) 1109 { 1110 int error; 1111 1112 PDEBUG(("%s", DEVICENAME(dev))); 1113 if (dev->state == DS_BUSY) 1114 return(EBUSY); 1115 if (dev->state != DS_ATTACHED) 1116 return(0); 1117 1118 if ((error = DEVICE_DETACH(dev)) != 0) 1119 return(error); 1120 device_printf(dev, "detached\n"); 1121 if (dev->parent) 1122 BUS_CHILD_DETACHED(dev->parent, dev); 1123 1124 if (!(dev->flags & DF_FIXEDCLASS)) 1125 devclass_delete_device(dev->devclass, dev); 1126 1127 dev->state = DS_NOTPRESENT; 1128 device_set_driver(dev, NULL); 1129 1130 return(0); 1131 } 1132 1133 int 1134 device_shutdown(device_t dev) 1135 { 1136 if (dev->state < DS_ATTACHED) 1137 return 0; 1138 PDEBUG(("%s", DEVICENAME(dev))); 1139 return DEVICE_SHUTDOWN(dev); 1140 } 1141 1142 int 1143 device_set_unit(device_t dev, int unit) 1144 { 1145 devclass_t dc; 1146 int err; 1147 1148 dc = device_get_devclass(dev); 1149 if (unit < dc->maxunit && dc->devices[unit]) 1150 return(EBUSY); 1151 err = devclass_delete_device(dc, dev); 1152 if (err) 1153 return(err); 1154 dev->unit = unit; 1155 err = devclass_add_device(dc, dev); 1156 return(err); 1157 } 1158 1159 #ifdef DEVICE_SYSCTLS 1160 1161 /* 1162 * Sysctl nodes for devices. 1163 */ 1164 1165 SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1166 1167 static int 1168 sysctl_handle_children(SYSCTL_HANDLER_ARGS) 1169 { 1170 device_t dev = arg1; 1171 device_t child; 1172 int first = 1, error = 0; 1173 1174 TAILQ_FOREACH(child, &dev->children, link) 1175 if (child->nameunit) { 1176 if (!first) { 1177 error = SYSCTL_OUT(req, ",", 1); 1178 if (error) 1179 return error; 1180 } else 1181 first = 0; 1182 error = SYSCTL_OUT(req, child->nameunit, 1183 strlen(child->nameunit)); 1184 if (error) 1185 return(error); 1186 } 1187 1188 error = SYSCTL_OUT(req, "", 1); 1189 1190 return(error); 1191 } 1192 1193 static int 1194 sysctl_handle_state(SYSCTL_HANDLER_ARGS) 1195 { 1196 device_t dev = arg1; 1197 1198 switch (dev->state) { 1199 case DS_NOTPRESENT: 1200 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1201 case DS_ALIVE: 1202 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1203 case DS_ATTACHED: 1204 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1205 case DS_BUSY: 1206 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1207 default: 1208 return (0); 1209 } 1210 } 1211 1212 static void 1213 device_register_oids(device_t dev) 1214 { 1215 struct sysctl_oid* oid; 1216 1217 oid = &dev->oid[0]; 1218 bzero(oid, sizeof(*oid)); 1219 oid->oid_parent = &sysctl__hw_devices_children; 1220 oid->oid_number = OID_AUTO; 1221 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1222 oid->oid_arg1 = &dev->oidlist[0]; 1223 oid->oid_arg2 = 0; 1224 oid->oid_name = dev->nameunit; 1225 oid->oid_handler = 0; 1226 oid->oid_fmt = "N"; 1227 SLIST_INIT(&dev->oidlist[0]); 1228 sysctl_register_oid(oid); 1229 1230 oid = &dev->oid[1]; 1231 bzero(oid, sizeof(*oid)); 1232 oid->oid_parent = &dev->oidlist[0]; 1233 oid->oid_number = OID_AUTO; 1234 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1235 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1236 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1237 oid->oid_name = "desc"; 1238 oid->oid_handler = sysctl_handle_string; 1239 oid->oid_fmt = "A"; 1240 sysctl_register_oid(oid); 1241 1242 oid = &dev->oid[2]; 1243 bzero(oid, sizeof(*oid)); 1244 oid->oid_parent = &dev->oidlist[0]; 1245 oid->oid_number = OID_AUTO; 1246 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1247 oid->oid_arg1 = dev; 1248 oid->oid_arg2 = 0; 1249 oid->oid_name = "children"; 1250 oid->oid_handler = sysctl_handle_children; 1251 oid->oid_fmt = "A"; 1252 sysctl_register_oid(oid); 1253 1254 oid = &dev->oid[3]; 1255 bzero(oid, sizeof(*oid)); 1256 oid->oid_parent = &dev->oidlist[0]; 1257 oid->oid_number = OID_AUTO; 1258 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1259 oid->oid_arg1 = dev; 1260 oid->oid_arg2 = 0; 1261 oid->oid_name = "state"; 1262 oid->oid_handler = sysctl_handle_state; 1263 oid->oid_fmt = "A"; 1264 sysctl_register_oid(oid); 1265 } 1266 1267 static void 1268 device_unregister_oids(device_t dev) 1269 { 1270 sysctl_unregister_oid(&dev->oid[0]); 1271 sysctl_unregister_oid(&dev->oid[1]); 1272 sysctl_unregister_oid(&dev->oid[2]); 1273 } 1274 1275 #endif 1276 1277 /*======================================*/ 1278 /* 1279 * Access functions for device resources. 1280 */ 1281 1282 /* Supplied by config(8) in ioconf.c */ 1283 extern struct config_device config_devtab[]; 1284 extern int devtab_count; 1285 1286 /* Runtime version */ 1287 struct config_device *devtab = config_devtab; 1288 1289 static int 1290 resource_new_name(const char *name, int unit) 1291 { 1292 struct config_device *new; 1293 1294 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, 1295 M_INTWAIT | M_ZERO); 1296 if (new == NULL) 1297 return(-1); 1298 if (devtab && devtab_count > 0) 1299 bcopy(devtab, new, devtab_count * sizeof(*new)); 1300 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 1301 if (new[devtab_count].name == NULL) { 1302 free(new, M_TEMP); 1303 return(-1); 1304 } 1305 strcpy(new[devtab_count].name, name); 1306 new[devtab_count].unit = unit; 1307 new[devtab_count].resource_count = 0; 1308 new[devtab_count].resources = NULL; 1309 if (devtab && devtab != config_devtab) 1310 free(devtab, M_TEMP); 1311 devtab = new; 1312 return devtab_count++; 1313 } 1314 1315 static int 1316 resource_new_resname(int j, const char *resname, resource_type type) 1317 { 1318 struct config_resource *new; 1319 int i; 1320 1321 i = devtab[j].resource_count; 1322 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 1323 if (new == NULL) 1324 return(-1); 1325 if (devtab[j].resources && i > 0) 1326 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1327 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 1328 if (new[i].name == NULL) { 1329 free(new, M_TEMP); 1330 return(-1); 1331 } 1332 strcpy(new[i].name, resname); 1333 new[i].type = type; 1334 if (devtab[j].resources) 1335 free(devtab[j].resources, M_TEMP); 1336 devtab[j].resources = new; 1337 devtab[j].resource_count = i + 1; 1338 return(i); 1339 } 1340 1341 static int 1342 resource_match_string(int i, const char *resname, const char *value) 1343 { 1344 int j; 1345 struct config_resource *res; 1346 1347 for (j = 0, res = devtab[i].resources; 1348 j < devtab[i].resource_count; j++, res++) 1349 if (!strcmp(res->name, resname) 1350 && res->type == RES_STRING 1351 && !strcmp(res->u.stringval, value)) 1352 return(j); 1353 return(-1); 1354 } 1355 1356 static int 1357 resource_find(const char *name, int unit, const char *resname, 1358 struct config_resource **result) 1359 { 1360 int i, j; 1361 struct config_resource *res; 1362 1363 /* 1364 * First check specific instances, then generic. 1365 */ 1366 for (i = 0; i < devtab_count; i++) { 1367 if (devtab[i].unit < 0) 1368 continue; 1369 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1370 res = devtab[i].resources; 1371 for (j = 0; j < devtab[i].resource_count; j++, res++) 1372 if (!strcmp(res->name, resname)) { 1373 *result = res; 1374 return(0); 1375 } 1376 } 1377 } 1378 for (i = 0; i < devtab_count; i++) { 1379 if (devtab[i].unit >= 0) 1380 continue; 1381 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1382 /* XXX if so, then the generic match does nothing */ 1383 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1384 res = devtab[i].resources; 1385 for (j = 0; j < devtab[i].resource_count; j++, res++) 1386 if (!strcmp(res->name, resname)) { 1387 *result = res; 1388 return(0); 1389 } 1390 } 1391 } 1392 return(ENOENT); 1393 } 1394 1395 int 1396 resource_int_value(const char *name, int unit, const char *resname, int *result) 1397 { 1398 int error; 1399 struct config_resource *res; 1400 1401 if ((error = resource_find(name, unit, resname, &res)) != 0) 1402 return(error); 1403 if (res->type != RES_INT) 1404 return(EFTYPE); 1405 *result = res->u.intval; 1406 return(0); 1407 } 1408 1409 int 1410 resource_long_value(const char *name, int unit, const char *resname, 1411 long *result) 1412 { 1413 int error; 1414 struct config_resource *res; 1415 1416 if ((error = resource_find(name, unit, resname, &res)) != 0) 1417 return(error); 1418 if (res->type != RES_LONG) 1419 return(EFTYPE); 1420 *result = res->u.longval; 1421 return(0); 1422 } 1423 1424 int 1425 resource_string_value(const char *name, int unit, const char *resname, 1426 char **result) 1427 { 1428 int error; 1429 struct config_resource *res; 1430 1431 if ((error = resource_find(name, unit, resname, &res)) != 0) 1432 return(error); 1433 if (res->type != RES_STRING) 1434 return(EFTYPE); 1435 *result = res->u.stringval; 1436 return(0); 1437 } 1438 1439 int 1440 resource_query_string(int i, const char *resname, const char *value) 1441 { 1442 if (i < 0) 1443 i = 0; 1444 else 1445 i = i + 1; 1446 for (; i < devtab_count; i++) 1447 if (resource_match_string(i, resname, value) >= 0) 1448 return(i); 1449 return(-1); 1450 } 1451 1452 int 1453 resource_locate(int i, const char *resname) 1454 { 1455 if (i < 0) 1456 i = 0; 1457 else 1458 i = i + 1; 1459 for (; i < devtab_count; i++) 1460 if (!strcmp(devtab[i].name, resname)) 1461 return(i); 1462 return(-1); 1463 } 1464 1465 int 1466 resource_count(void) 1467 { 1468 return(devtab_count); 1469 } 1470 1471 char * 1472 resource_query_name(int i) 1473 { 1474 return(devtab[i].name); 1475 } 1476 1477 int 1478 resource_query_unit(int i) 1479 { 1480 return(devtab[i].unit); 1481 } 1482 1483 static int 1484 resource_create(const char *name, int unit, const char *resname, 1485 resource_type type, struct config_resource **result) 1486 { 1487 int i, j; 1488 struct config_resource *res = NULL; 1489 1490 for (i = 0; i < devtab_count; i++) 1491 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1492 res = devtab[i].resources; 1493 break; 1494 } 1495 if (res == NULL) { 1496 i = resource_new_name(name, unit); 1497 if (i < 0) 1498 return(ENOMEM); 1499 res = devtab[i].resources; 1500 } 1501 for (j = 0; j < devtab[i].resource_count; j++, res++) 1502 if (!strcmp(res->name, resname)) { 1503 *result = res; 1504 return(0); 1505 } 1506 j = resource_new_resname(i, resname, type); 1507 if (j < 0) 1508 return(ENOMEM); 1509 res = &devtab[i].resources[j]; 1510 *result = res; 1511 return(0); 1512 } 1513 1514 int 1515 resource_set_int(const char *name, int unit, const char *resname, int value) 1516 { 1517 int error; 1518 struct config_resource *res; 1519 1520 error = resource_create(name, unit, resname, RES_INT, &res); 1521 if (error) 1522 return(error); 1523 if (res->type != RES_INT) 1524 return(EFTYPE); 1525 res->u.intval = value; 1526 return(0); 1527 } 1528 1529 int 1530 resource_set_long(const char *name, int unit, const char *resname, long value) 1531 { 1532 int error; 1533 struct config_resource *res; 1534 1535 error = resource_create(name, unit, resname, RES_LONG, &res); 1536 if (error) 1537 return(error); 1538 if (res->type != RES_LONG) 1539 return(EFTYPE); 1540 res->u.longval = value; 1541 return(0); 1542 } 1543 1544 int 1545 resource_set_string(const char *name, int unit, const char *resname, 1546 const char *value) 1547 { 1548 int error; 1549 struct config_resource *res; 1550 1551 error = resource_create(name, unit, resname, RES_STRING, &res); 1552 if (error) 1553 return(error); 1554 if (res->type != RES_STRING) 1555 return(EFTYPE); 1556 if (res->u.stringval) 1557 free(res->u.stringval, M_TEMP); 1558 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 1559 if (res->u.stringval == NULL) 1560 return(ENOMEM); 1561 strcpy(res->u.stringval, value); 1562 return(0); 1563 } 1564 1565 static void 1566 resource_cfgload(void *dummy __unused) 1567 { 1568 struct config_resource *res, *cfgres; 1569 int i, j; 1570 int error; 1571 char *name, *resname; 1572 int unit; 1573 resource_type type; 1574 char *stringval; 1575 int config_devtab_count; 1576 1577 config_devtab_count = devtab_count; 1578 devtab = NULL; 1579 devtab_count = 0; 1580 1581 for (i = 0; i < config_devtab_count; i++) { 1582 name = config_devtab[i].name; 1583 unit = config_devtab[i].unit; 1584 1585 for (j = 0; j < config_devtab[i].resource_count; j++) { 1586 cfgres = config_devtab[i].resources; 1587 resname = cfgres[j].name; 1588 type = cfgres[j].type; 1589 error = resource_create(name, unit, resname, type, 1590 &res); 1591 if (error) { 1592 printf("create resource %s%d: error %d\n", 1593 name, unit, error); 1594 continue; 1595 } 1596 if (res->type != type) { 1597 printf("type mismatch %s%d: %d != %d\n", 1598 name, unit, res->type, type); 1599 continue; 1600 } 1601 switch (type) { 1602 case RES_INT: 1603 res->u.intval = cfgres[j].u.intval; 1604 break; 1605 case RES_LONG: 1606 res->u.longval = cfgres[j].u.longval; 1607 break; 1608 case RES_STRING: 1609 if (res->u.stringval) 1610 free(res->u.stringval, M_TEMP); 1611 stringval = cfgres[j].u.stringval; 1612 res->u.stringval = malloc(strlen(stringval) + 1, 1613 M_TEMP, M_INTWAIT); 1614 if (res->u.stringval == NULL) 1615 break; 1616 strcpy(res->u.stringval, stringval); 1617 break; 1618 default: 1619 panic("unknown resource type %d", type); 1620 } 1621 } 1622 } 1623 } 1624 SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1625 1626 1627 /*======================================*/ 1628 /* 1629 * Some useful method implementations to make life easier for bus drivers. 1630 */ 1631 1632 void 1633 resource_list_init(struct resource_list *rl) 1634 { 1635 SLIST_INIT(rl); 1636 } 1637 1638 void 1639 resource_list_free(struct resource_list *rl) 1640 { 1641 struct resource_list_entry *rle; 1642 1643 while ((rle = SLIST_FIRST(rl)) != NULL) { 1644 if (rle->res) 1645 panic("resource_list_free: resource entry is busy"); 1646 SLIST_REMOVE_HEAD(rl, link); 1647 free(rle, M_BUS); 1648 } 1649 } 1650 1651 void 1652 resource_list_add(struct resource_list *rl, 1653 int type, int rid, 1654 u_long start, u_long end, u_long count) 1655 { 1656 struct resource_list_entry *rle; 1657 1658 rle = resource_list_find(rl, type, rid); 1659 if (rle == NULL) { 1660 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1661 M_INTWAIT); 1662 if (!rle) 1663 panic("resource_list_add: can't record entry"); 1664 SLIST_INSERT_HEAD(rl, rle, link); 1665 rle->type = type; 1666 rle->rid = rid; 1667 rle->res = NULL; 1668 } 1669 1670 if (rle->res) 1671 panic("resource_list_add: resource entry is busy"); 1672 1673 rle->start = start; 1674 rle->end = end; 1675 rle->count = count; 1676 } 1677 1678 struct resource_list_entry* 1679 resource_list_find(struct resource_list *rl, 1680 int type, int rid) 1681 { 1682 struct resource_list_entry *rle; 1683 1684 SLIST_FOREACH(rle, rl, link) 1685 if (rle->type == type && rle->rid == rid) 1686 return(rle); 1687 return(NULL); 1688 } 1689 1690 void 1691 resource_list_delete(struct resource_list *rl, 1692 int type, int rid) 1693 { 1694 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1695 1696 if (rle) { 1697 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1698 free(rle, M_BUS); 1699 } 1700 } 1701 1702 struct resource * 1703 resource_list_alloc(struct resource_list *rl, 1704 device_t bus, device_t child, 1705 int type, int *rid, 1706 u_long start, u_long end, 1707 u_long count, u_int flags) 1708 { 1709 struct resource_list_entry *rle = 0; 1710 int passthrough = (device_get_parent(child) != bus); 1711 int isdefault = (start == 0UL && end == ~0UL); 1712 1713 if (passthrough) { 1714 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1715 type, rid, 1716 start, end, count, flags)); 1717 } 1718 1719 rle = resource_list_find(rl, type, *rid); 1720 1721 if (!rle) 1722 return(0); /* no resource of that type/rid */ 1723 if (rle->res) 1724 panic("resource_list_alloc: resource entry is busy"); 1725 1726 if (isdefault) { 1727 start = rle->start; 1728 count = max(count, rle->count); 1729 end = max(rle->end, start + count - 1); 1730 } 1731 1732 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1733 type, rid, start, end, count, flags); 1734 1735 /* 1736 * Record the new range. 1737 */ 1738 if (rle->res) { 1739 rle->start = rman_get_start(rle->res); 1740 rle->end = rman_get_end(rle->res); 1741 rle->count = count; 1742 } 1743 1744 return(rle->res); 1745 } 1746 1747 int 1748 resource_list_release(struct resource_list *rl, 1749 device_t bus, device_t child, 1750 int type, int rid, struct resource *res) 1751 { 1752 struct resource_list_entry *rle = 0; 1753 int passthrough = (device_get_parent(child) != bus); 1754 int error; 1755 1756 if (passthrough) { 1757 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1758 type, rid, res)); 1759 } 1760 1761 rle = resource_list_find(rl, type, rid); 1762 1763 if (!rle) 1764 panic("resource_list_release: can't find resource"); 1765 if (!rle->res) 1766 panic("resource_list_release: resource entry is not busy"); 1767 1768 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1769 type, rid, res); 1770 if (error) 1771 return(error); 1772 1773 rle->res = NULL; 1774 return(0); 1775 } 1776 1777 int 1778 resource_list_print_type(struct resource_list *rl, const char *name, int type, 1779 const char *format) 1780 { 1781 struct resource_list_entry *rle; 1782 int printed, retval; 1783 1784 printed = 0; 1785 retval = 0; 1786 /* Yes, this is kinda cheating */ 1787 SLIST_FOREACH(rle, rl, link) { 1788 if (rle->type == type) { 1789 if (printed == 0) 1790 retval += printf(" %s ", name); 1791 else 1792 retval += printf(","); 1793 printed++; 1794 retval += printf(format, rle->start); 1795 if (rle->count > 1) { 1796 retval += printf("-"); 1797 retval += printf(format, rle->start + 1798 rle->count - 1); 1799 } 1800 } 1801 } 1802 return(retval); 1803 } 1804 1805 /* 1806 * Generic driver/device identify functions. These will install a device 1807 * rendezvous point under the parent using the same name as the driver 1808 * name, which will at a later time be probed and attached. 1809 * 1810 * These functions are used when the parent does not 'scan' its bus for 1811 * matching devices, or for the particular devices using these functions, 1812 * or when the device is a pseudo or synthesized device (such as can be 1813 * found under firewire and ppbus). 1814 */ 1815 int 1816 bus_generic_identify(driver_t *driver, device_t parent) 1817 { 1818 if (parent->state == DS_ATTACHED) 1819 return (0); 1820 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); 1821 return (0); 1822 } 1823 1824 int 1825 bus_generic_identify_sameunit(driver_t *driver, device_t parent) 1826 { 1827 if (parent->state == DS_ATTACHED) 1828 return (0); 1829 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); 1830 return (0); 1831 } 1832 1833 /* 1834 * Call DEVICE_IDENTIFY for each driver. 1835 */ 1836 int 1837 bus_generic_probe(device_t dev) 1838 { 1839 devclass_t dc = dev->devclass; 1840 driverlink_t dl; 1841 1842 TAILQ_FOREACH(dl, &dc->drivers, link) { 1843 DEVICE_IDENTIFY(dl->driver, dev); 1844 } 1845 1846 return(0); 1847 } 1848 1849 /* 1850 * This is an aweful hack due to the isa bus and autoconf code not 1851 * probing the ISA devices until after everything else has configured. 1852 * The ISA bus did a dummy attach long ago so we have to set it back 1853 * to an earlier state so the probe thinks its the initial probe and 1854 * not a bus rescan. 1855 * 1856 * XXX remove by properly defering the ISA bus scan. 1857 */ 1858 int 1859 bus_generic_probe_hack(device_t dev) 1860 { 1861 if (dev->state == DS_ATTACHED) { 1862 dev->state = DS_ALIVE; 1863 bus_generic_probe(dev); 1864 dev->state = DS_ATTACHED; 1865 } 1866 return (0); 1867 } 1868 1869 int 1870 bus_generic_attach(device_t dev) 1871 { 1872 device_t child; 1873 1874 TAILQ_FOREACH(child, &dev->children, link) { 1875 device_probe_and_attach(child); 1876 } 1877 1878 return(0); 1879 } 1880 1881 int 1882 bus_generic_detach(device_t dev) 1883 { 1884 device_t child; 1885 int error; 1886 1887 if (dev->state != DS_ATTACHED) 1888 return(EBUSY); 1889 1890 TAILQ_FOREACH(child, &dev->children, link) 1891 if ((error = device_detach(child)) != 0) 1892 return(error); 1893 1894 return 0; 1895 } 1896 1897 int 1898 bus_generic_shutdown(device_t dev) 1899 { 1900 device_t child; 1901 1902 TAILQ_FOREACH(child, &dev->children, link) 1903 device_shutdown(child); 1904 1905 return(0); 1906 } 1907 1908 int 1909 bus_generic_suspend(device_t dev) 1910 { 1911 int error; 1912 device_t child, child2; 1913 1914 TAILQ_FOREACH(child, &dev->children, link) { 1915 error = DEVICE_SUSPEND(child); 1916 if (error) { 1917 for (child2 = TAILQ_FIRST(&dev->children); 1918 child2 && child2 != child; 1919 child2 = TAILQ_NEXT(child2, link)) 1920 DEVICE_RESUME(child2); 1921 return(error); 1922 } 1923 } 1924 return(0); 1925 } 1926 1927 int 1928 bus_generic_resume(device_t dev) 1929 { 1930 device_t child; 1931 1932 TAILQ_FOREACH(child, &dev->children, link) 1933 DEVICE_RESUME(child); 1934 /* if resume fails, there's nothing we can usefully do... */ 1935 1936 return(0); 1937 } 1938 1939 int 1940 bus_print_child_header(device_t dev, device_t child) 1941 { 1942 int retval = 0; 1943 1944 if (device_get_desc(child)) 1945 retval += device_printf(child, "<%s>", device_get_desc(child)); 1946 else 1947 retval += printf("%s", device_get_nameunit(child)); 1948 if (bootverbose) { 1949 if (child->state != DS_ATTACHED) 1950 printf(" [tentative]"); 1951 else 1952 printf(" [attached!]"); 1953 } 1954 return(retval); 1955 } 1956 1957 int 1958 bus_print_child_footer(device_t dev, device_t child) 1959 { 1960 return(printf(" on %s\n", device_get_nameunit(dev))); 1961 } 1962 1963 device_t 1964 bus_generic_add_child(device_t dev, device_t child, int order, 1965 const char *name, int unit) 1966 { 1967 if (dev->parent) 1968 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); 1969 else 1970 dev = device_add_child_ordered(child, order, name, unit); 1971 return(dev); 1972 1973 } 1974 1975 int 1976 bus_generic_print_child(device_t dev, device_t child) 1977 { 1978 int retval = 0; 1979 1980 retval += bus_print_child_header(dev, child); 1981 retval += bus_print_child_footer(dev, child); 1982 1983 return(retval); 1984 } 1985 1986 int 1987 bus_generic_read_ivar(device_t dev, device_t child, int index, 1988 uintptr_t * result) 1989 { 1990 int error; 1991 1992 if (dev->parent) 1993 error = BUS_READ_IVAR(dev->parent, child, index, result); 1994 else 1995 error = ENOENT; 1996 return (error); 1997 } 1998 1999 int 2000 bus_generic_write_ivar(device_t dev, device_t child, int index, 2001 uintptr_t value) 2002 { 2003 int error; 2004 2005 if (dev->parent) 2006 error = BUS_WRITE_IVAR(dev->parent, child, index, value); 2007 else 2008 error = ENOENT; 2009 return (error); 2010 } 2011 2012 struct resource_list * 2013 bus_generic_get_resource_list(device_t dev, device_t child) 2014 { 2015 struct resource_list *rl; 2016 2017 if (dev->parent) 2018 rl = BUS_GET_RESOURCE_LIST(dev->parent, child); 2019 else 2020 rl = NULL; 2021 return (rl); 2022 } 2023 2024 void 2025 bus_generic_driver_added(device_t dev, driver_t *driver) 2026 { 2027 device_t child; 2028 2029 DEVICE_IDENTIFY(driver, dev); 2030 TAILQ_FOREACH(child, &dev->children, link) { 2031 if (child->state == DS_NOTPRESENT) 2032 device_probe_and_attach(child); 2033 } 2034 } 2035 2036 int 2037 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 2038 int flags, driver_intr_t *intr, void *arg, 2039 void **cookiep, lwkt_serialize_t serializer) 2040 { 2041 /* Propagate up the bus hierarchy until someone handles it. */ 2042 if (dev->parent) 2043 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 2044 intr, arg, cookiep, serializer)); 2045 else 2046 return(EINVAL); 2047 } 2048 2049 int 2050 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 2051 void *cookie) 2052 { 2053 /* Propagate up the bus hierarchy until someone handles it. */ 2054 if (dev->parent) 2055 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 2056 else 2057 return(EINVAL); 2058 } 2059 2060 int 2061 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 2062 { 2063 if (dev->parent) 2064 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 2065 else 2066 return(0); 2067 } 2068 2069 void 2070 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 2071 { 2072 if (dev->parent) 2073 BUS_ENABLE_INTR(dev->parent, child, cookie); 2074 } 2075 2076 int 2077 bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, 2078 enum intr_polarity pol) 2079 { 2080 /* Propagate up the bus hierarchy until someone handles it. */ 2081 if (dev->parent) 2082 return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); 2083 else 2084 return(EINVAL); 2085 } 2086 2087 struct resource * 2088 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 2089 u_long start, u_long end, u_long count, u_int flags) 2090 { 2091 /* Propagate up the bus hierarchy until someone handles it. */ 2092 if (dev->parent) 2093 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 2094 start, end, count, flags)); 2095 else 2096 return(NULL); 2097 } 2098 2099 int 2100 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2101 struct resource *r) 2102 { 2103 /* Propagate up the bus hierarchy until someone handles it. */ 2104 if (dev->parent) 2105 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 2106 else 2107 return(EINVAL); 2108 } 2109 2110 int 2111 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2112 struct resource *r) 2113 { 2114 /* Propagate up the bus hierarchy until someone handles it. */ 2115 if (dev->parent) 2116 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 2117 else 2118 return(EINVAL); 2119 } 2120 2121 int 2122 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2123 int rid, struct resource *r) 2124 { 2125 /* Propagate up the bus hierarchy until someone handles it. */ 2126 if (dev->parent) 2127 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2128 r)); 2129 else 2130 return(EINVAL); 2131 } 2132 2133 int 2134 bus_generic_get_resource(device_t dev, device_t child, int type, int rid, 2135 u_long *startp, u_long *countp) 2136 { 2137 int error; 2138 2139 error = ENOENT; 2140 if (dev->parent) { 2141 error = BUS_GET_RESOURCE(dev->parent, child, type, rid, 2142 startp, countp); 2143 } 2144 return (error); 2145 } 2146 2147 int 2148 bus_generic_set_resource(device_t dev, device_t child, int type, int rid, 2149 u_long start, u_long count) 2150 { 2151 int error; 2152 2153 error = EINVAL; 2154 if (dev->parent) { 2155 error = BUS_SET_RESOURCE(dev->parent, child, type, rid, 2156 start, count); 2157 } 2158 return (error); 2159 } 2160 2161 void 2162 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) 2163 { 2164 if (dev->parent) 2165 BUS_DELETE_RESOURCE(dev, child, type, rid); 2166 } 2167 2168 int 2169 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2170 u_long *startp, u_long *countp) 2171 { 2172 struct resource_list *rl = NULL; 2173 struct resource_list_entry *rle = NULL; 2174 2175 rl = BUS_GET_RESOURCE_LIST(dev, child); 2176 if (!rl) 2177 return(EINVAL); 2178 2179 rle = resource_list_find(rl, type, rid); 2180 if (!rle) 2181 return(ENOENT); 2182 2183 if (startp) 2184 *startp = rle->start; 2185 if (countp) 2186 *countp = rle->count; 2187 2188 return(0); 2189 } 2190 2191 int 2192 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2193 u_long start, u_long count) 2194 { 2195 struct resource_list *rl = NULL; 2196 2197 rl = BUS_GET_RESOURCE_LIST(dev, child); 2198 if (!rl) 2199 return(EINVAL); 2200 2201 resource_list_add(rl, type, rid, start, (start + count - 1), count); 2202 2203 return(0); 2204 } 2205 2206 void 2207 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2208 { 2209 struct resource_list *rl = NULL; 2210 2211 rl = BUS_GET_RESOURCE_LIST(dev, child); 2212 if (!rl) 2213 return; 2214 2215 resource_list_delete(rl, type, rid); 2216 } 2217 2218 int 2219 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2220 int rid, struct resource *r) 2221 { 2222 struct resource_list *rl = NULL; 2223 2224 rl = BUS_GET_RESOURCE_LIST(dev, child); 2225 if (!rl) 2226 return(EINVAL); 2227 2228 return(resource_list_release(rl, dev, child, type, rid, r)); 2229 } 2230 2231 struct resource * 2232 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2233 int *rid, u_long start, u_long end, u_long count, u_int flags) 2234 { 2235 struct resource_list *rl = NULL; 2236 2237 rl = BUS_GET_RESOURCE_LIST(dev, child); 2238 if (!rl) 2239 return(NULL); 2240 2241 return(resource_list_alloc(rl, dev, child, type, rid, 2242 start, end, count, flags)); 2243 } 2244 2245 int 2246 bus_generic_child_present(device_t bus, device_t child) 2247 { 2248 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2249 } 2250 2251 2252 /* 2253 * Some convenience functions to make it easier for drivers to use the 2254 * resource-management functions. All these really do is hide the 2255 * indirection through the parent's method table, making for slightly 2256 * less-wordy code. In the future, it might make sense for this code 2257 * to maintain some sort of a list of resources allocated by each device. 2258 */ 2259 struct resource * 2260 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2261 u_long count, u_int flags) 2262 { 2263 if (dev->parent == 0) 2264 return(0); 2265 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2266 count, flags)); 2267 } 2268 2269 int 2270 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2271 { 2272 if (dev->parent == 0) 2273 return(EINVAL); 2274 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2275 } 2276 2277 int 2278 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2279 { 2280 if (dev->parent == 0) 2281 return(EINVAL); 2282 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2283 } 2284 2285 int 2286 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2287 { 2288 if (dev->parent == 0) 2289 return(EINVAL); 2290 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2291 } 2292 2293 int 2294 bus_setup_intr(device_t dev, struct resource *r, int flags, 2295 driver_intr_t handler, void *arg, 2296 void **cookiep, lwkt_serialize_t serializer) 2297 { 2298 if (dev->parent == 0) 2299 return(EINVAL); 2300 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2301 cookiep, serializer)); 2302 } 2303 2304 int 2305 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2306 { 2307 if (dev->parent == 0) 2308 return(EINVAL); 2309 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2310 } 2311 2312 void 2313 bus_enable_intr(device_t dev, void *cookie) 2314 { 2315 if (dev->parent) 2316 BUS_ENABLE_INTR(dev->parent, dev, cookie); 2317 } 2318 2319 int 2320 bus_disable_intr(device_t dev, void *cookie) 2321 { 2322 if (dev->parent) 2323 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 2324 else 2325 return(0); 2326 } 2327 2328 int 2329 bus_set_resource(device_t dev, int type, int rid, 2330 u_long start, u_long count) 2331 { 2332 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2333 start, count)); 2334 } 2335 2336 int 2337 bus_get_resource(device_t dev, int type, int rid, 2338 u_long *startp, u_long *countp) 2339 { 2340 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2341 startp, countp)); 2342 } 2343 2344 u_long 2345 bus_get_resource_start(device_t dev, int type, int rid) 2346 { 2347 u_long start, count; 2348 int error; 2349 2350 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2351 &start, &count); 2352 if (error) 2353 return(0); 2354 return(start); 2355 } 2356 2357 u_long 2358 bus_get_resource_count(device_t dev, int type, int rid) 2359 { 2360 u_long start, count; 2361 int error; 2362 2363 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2364 &start, &count); 2365 if (error) 2366 return(0); 2367 return(count); 2368 } 2369 2370 void 2371 bus_delete_resource(device_t dev, int type, int rid) 2372 { 2373 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2374 } 2375 2376 int 2377 bus_child_present(device_t child) 2378 { 2379 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2380 } 2381 2382 int 2383 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2384 { 2385 device_t parent; 2386 2387 parent = device_get_parent(child); 2388 if (parent == NULL) { 2389 *buf = '\0'; 2390 return (0); 2391 } 2392 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2393 } 2394 2395 int 2396 bus_child_location_str(device_t child, char *buf, size_t buflen) 2397 { 2398 device_t parent; 2399 2400 parent = device_get_parent(child); 2401 if (parent == NULL) { 2402 *buf = '\0'; 2403 return (0); 2404 } 2405 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2406 } 2407 2408 static int 2409 root_print_child(device_t dev, device_t child) 2410 { 2411 return(0); 2412 } 2413 2414 static int 2415 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2416 void **cookiep, lwkt_serialize_t serializer) 2417 { 2418 /* 2419 * If an interrupt mapping gets to here something bad has happened. 2420 */ 2421 panic("root_setup_intr"); 2422 } 2423 2424 /* 2425 * If we get here, assume that the device is permanant and really is 2426 * present in the system. Removable bus drivers are expected to intercept 2427 * this call long before it gets here. We return -1 so that drivers that 2428 * really care can check vs -1 or some ERRNO returned higher in the food 2429 * chain. 2430 */ 2431 static int 2432 root_child_present(device_t dev, device_t child) 2433 { 2434 return(-1); 2435 } 2436 2437 /* 2438 * XXX NOTE! other defaults may be set in bus_if.m 2439 */ 2440 static kobj_method_t root_methods[] = { 2441 /* Device interface */ 2442 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2443 KOBJMETHOD(device_suspend, bus_generic_suspend), 2444 KOBJMETHOD(device_resume, bus_generic_resume), 2445 2446 /* Bus interface */ 2447 KOBJMETHOD(bus_add_child, bus_generic_add_child), 2448 KOBJMETHOD(bus_print_child, root_print_child), 2449 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2450 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2451 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2452 KOBJMETHOD(bus_child_present, root_child_present), 2453 2454 { 0, 0 } 2455 }; 2456 2457 static driver_t root_driver = { 2458 "root", 2459 root_methods, 2460 1, /* no softc */ 2461 }; 2462 2463 device_t root_bus; 2464 devclass_t root_devclass; 2465 2466 static int 2467 root_bus_module_handler(module_t mod, int what, void* arg) 2468 { 2469 switch (what) { 2470 case MOD_LOAD: 2471 root_bus = make_device(NULL, "root", 0); 2472 root_bus->desc = "System root bus"; 2473 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2474 root_bus->driver = &root_driver; 2475 root_bus->state = DS_ALIVE; 2476 root_devclass = devclass_find_internal("root", NULL, FALSE); 2477 return(0); 2478 2479 case MOD_SHUTDOWN: 2480 device_shutdown(root_bus); 2481 return(0); 2482 default: 2483 return(0); 2484 } 2485 } 2486 2487 static moduledata_t root_bus_mod = { 2488 "rootbus", 2489 root_bus_module_handler, 2490 0 2491 }; 2492 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2493 2494 void 2495 root_bus_configure(void) 2496 { 2497 device_t dev; 2498 2499 PDEBUG((".")); 2500 2501 /* 2502 * handle device_identify based device attachments to the root_bus 2503 * (typically nexus). 2504 */ 2505 bus_generic_probe(root_bus); 2506 2507 /* 2508 * Probe and attach the devices under root_bus. 2509 */ 2510 TAILQ_FOREACH(dev, &root_bus->children, link) { 2511 device_probe_and_attach(dev); 2512 } 2513 root_bus->state = DS_ATTACHED; 2514 } 2515 2516 int 2517 driver_module_handler(module_t mod, int what, void *arg) 2518 { 2519 int error; 2520 struct driver_module_data *dmd; 2521 devclass_t bus_devclass; 2522 kobj_class_t driver; 2523 const char *parentname; 2524 2525 dmd = (struct driver_module_data *)arg; 2526 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 2527 error = 0; 2528 2529 switch (what) { 2530 case MOD_LOAD: 2531 if (dmd->dmd_chainevh) 2532 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2533 2534 driver = dmd->dmd_driver; 2535 PDEBUG(("Loading module: driver %s on bus %s", 2536 DRIVERNAME(driver), dmd->dmd_busname)); 2537 error = devclass_add_driver(bus_devclass, driver); 2538 if (error) 2539 break; 2540 2541 /* 2542 * If the driver has any base classes, make the 2543 * devclass inherit from the devclass of the driver's 2544 * first base class. This will allow the system to 2545 * search for drivers in both devclasses for children 2546 * of a device using this driver. 2547 */ 2548 if (driver->baseclasses) 2549 parentname = driver->baseclasses[0]->name; 2550 else 2551 parentname = NULL; 2552 *dmd->dmd_devclass = devclass_find_internal(driver->name, 2553 parentname, TRUE); 2554 break; 2555 2556 case MOD_UNLOAD: 2557 PDEBUG(("Unloading module: driver %s from bus %s", 2558 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 2559 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 2560 2561 if (!error && dmd->dmd_chainevh) 2562 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2563 break; 2564 } 2565 2566 return (error); 2567 } 2568 2569 #ifdef BUS_DEBUG 2570 2571 /* 2572 * The _short versions avoid iteration by not calling anything that prints 2573 * more than oneliners. I love oneliners. 2574 */ 2575 2576 static void 2577 print_device_short(device_t dev, int indent) 2578 { 2579 if (!dev) 2580 return; 2581 2582 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2583 dev->unit, dev->desc, 2584 (dev->parent? "":"no "), 2585 (TAILQ_EMPTY(&dev->children)? "no ":""), 2586 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2587 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2588 (dev->flags&DF_WILDCARD? "wildcard,":""), 2589 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2590 (dev->ivars? "":"no "), 2591 (dev->softc? "":"no "), 2592 dev->busy)); 2593 } 2594 2595 static void 2596 print_device(device_t dev, int indent) 2597 { 2598 if (!dev) 2599 return; 2600 2601 print_device_short(dev, indent); 2602 2603 indentprintf(("Parent:\n")); 2604 print_device_short(dev->parent, indent+1); 2605 indentprintf(("Driver:\n")); 2606 print_driver_short(dev->driver, indent+1); 2607 indentprintf(("Devclass:\n")); 2608 print_devclass_short(dev->devclass, indent+1); 2609 } 2610 2611 /* 2612 * Print the device and all its children (indented). 2613 */ 2614 void 2615 print_device_tree_short(device_t dev, int indent) 2616 { 2617 device_t child; 2618 2619 if (!dev) 2620 return; 2621 2622 print_device_short(dev, indent); 2623 2624 TAILQ_FOREACH(child, &dev->children, link) 2625 print_device_tree_short(child, indent+1); 2626 } 2627 2628 /* 2629 * Print the device and all its children (indented). 2630 */ 2631 void 2632 print_device_tree(device_t dev, int indent) 2633 { 2634 device_t child; 2635 2636 if (!dev) 2637 return; 2638 2639 print_device(dev, indent); 2640 2641 TAILQ_FOREACH(child, &dev->children, link) 2642 print_device_tree(child, indent+1); 2643 } 2644 2645 static void 2646 print_driver_short(driver_t *driver, int indent) 2647 { 2648 if (!driver) 2649 return; 2650 2651 indentprintf(("driver %s: softc size = %d\n", 2652 driver->name, driver->size)); 2653 } 2654 2655 static void 2656 print_driver(driver_t *driver, int indent) 2657 { 2658 if (!driver) 2659 return; 2660 2661 print_driver_short(driver, indent); 2662 } 2663 2664 2665 static void 2666 print_driver_list(driver_list_t drivers, int indent) 2667 { 2668 driverlink_t driver; 2669 2670 TAILQ_FOREACH(driver, &drivers, link) 2671 print_driver(driver->driver, indent); 2672 } 2673 2674 static void 2675 print_devclass_short(devclass_t dc, int indent) 2676 { 2677 if (!dc) 2678 return; 2679 2680 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2681 } 2682 2683 static void 2684 print_devclass(devclass_t dc, int indent) 2685 { 2686 int i; 2687 2688 if (!dc) 2689 return; 2690 2691 print_devclass_short(dc, indent); 2692 indentprintf(("Drivers:\n")); 2693 print_driver_list(dc->drivers, indent+1); 2694 2695 indentprintf(("Devices:\n")); 2696 for (i = 0; i < dc->maxunit; i++) 2697 if (dc->devices[i]) 2698 print_device(dc->devices[i], indent+1); 2699 } 2700 2701 void 2702 print_devclass_list_short(void) 2703 { 2704 devclass_t dc; 2705 2706 printf("Short listing of devclasses, drivers & devices:\n"); 2707 TAILQ_FOREACH(dc, &devclasses, link) { 2708 print_devclass_short(dc, 0); 2709 } 2710 } 2711 2712 void 2713 print_devclass_list(void) 2714 { 2715 devclass_t dc; 2716 2717 printf("Full listing of devclasses, drivers & devices:\n"); 2718 TAILQ_FOREACH(dc, &devclasses, link) { 2719 print_devclass(dc, 0); 2720 } 2721 } 2722 2723 #endif 2724 2725 /* 2726 * Check to see if a device is disabled via a disabled hint. 2727 */ 2728 int 2729 resource_disabled(const char *name, int unit) 2730 { 2731 int error, value; 2732 2733 error = resource_int_value(name, unit, "disabled", &value); 2734 if (error) 2735 return(0); 2736 return(value); 2737 } 2738