sys/kern/subr_bus.c

   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 1.24 2005/02/17 13:59:36 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                     const char *desc;
1065
1066                     if ((desc = device_get_desc(tmp)) != NULL)
1067                         printf(".%s[%s]", device_get_nameunit(tmp), desc);
1068                     else
1069                         printf(".%s", device_get_nameunit(tmp));
1070                 }
1071                 printf("\n");
1072         }
1073         if (!device_is_quiet(dev))
1074                 device_print_child(bus, dev);
1075         error = DEVICE_ATTACH(dev);
1076         if (error == 0) {
1077                 dev->state = DS_ATTACHED;
1078                 if (bootverbose && !device_is_quiet(dev))
1079                         device_print_child(bus, dev);
1080         } else {
1081                 printf("device_probe_and_attach: %s%d attach returned %d\n",
1082                        dev->driver->name, dev->unit, error);
1083                 /* Unset the class that was set in device_probe_child */
1084                 if (!hasclass)
1085                         device_set_devclass(dev, 0);
1086                 device_set_driver(dev, NULL);
1087                 dev->state = DS_NOTPRESENT;
1088         }
1089
1090         return(error);
1091 }
1092
1093 int
1094 device_detach(device_t dev)
1095 {
1096         int error;
1097
1098         PDEBUG(("%s", DEVICENAME(dev)));
1099         if (dev->state == DS_BUSY)
1100                 return(EBUSY);
1101         if (dev->state != DS_ATTACHED)
1102                 return(0);
1103
1104         if ((error = DEVICE_DETACH(dev)) != 0)
1105                 return(error);
1106         device_printf(dev, "detached\n");
1107         if (dev->parent)
1108                 BUS_CHILD_DETACHED(dev->parent, dev);
1109
1110         if (!(dev->flags & DF_FIXEDCLASS))
1111                 devclass_delete_device(dev->devclass, dev);
1112
1113         dev->state = DS_NOTPRESENT;
1114         device_set_driver(dev, NULL);
1115
1116         return(0);
1117 }
1118
1119 int
1120 device_shutdown(device_t dev)
1121 {
1122         if (dev->state < DS_ATTACHED)
1123                 return 0;
1124         PDEBUG(("%s", DEVICENAME(dev)));
1125         return DEVICE_SHUTDOWN(dev);
1126 }
1127
1128 int
1129 device_set_unit(device_t dev, int unit)
1130 {
1131         devclass_t dc;
1132         int err;
1133
1134         dc = device_get_devclass(dev);
1135         if (unit < dc->maxunit && dc->devices[unit])
1136                 return(EBUSY);
1137         err = devclass_delete_device(dc, dev);
1138         if (err)
1139                 return(err);
1140         dev->unit = unit;
1141         err = devclass_add_device(dc, dev);
1142         return(err);
1143 }
1144
1145 #ifdef DEVICE_SYSCTLS
1146
1147 /*
1148  * Sysctl nodes for devices.
1149  */
1150
1151 SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices");
1152
1153 static int
1154 sysctl_handle_children(SYSCTL_HANDLER_ARGS)
1155 {
1156         device_t dev = arg1;
1157         device_t child;
1158         int first = 1, error = 0;
1159
1160         TAILQ_FOREACH(child, &dev->children, link)
1161                 if (child->nameunit) {
1162                         if (!first) {
1163                                 error = SYSCTL_OUT(req, ",", 1);
1164                                 if (error)
1165                                         return error;
1166                         } else
1167                                 first = 0;
1168                         error = SYSCTL_OUT(req, child->nameunit,
1169                                            strlen(child->nameunit));
1170                         if (error)
1171                                 return(error);
1172                 }
1173
1174         error = SYSCTL_OUT(req, "", 1);
1175
1176         return(error);
1177 }
1178
1179 static int
1180 sysctl_handle_state(SYSCTL_HANDLER_ARGS)
1181 {
1182         device_t dev = arg1;
1183
1184         switch (dev->state) {
1185         case DS_NOTPRESENT:
1186                 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent"));
1187         case DS_ALIVE:
1188                 return SYSCTL_OUT(req, "alive", sizeof("alive"));
1189         case DS_ATTACHED:
1190                 return SYSCTL_OUT(req, "attached", sizeof("attached"));
1191         case DS_BUSY:
1192                 return SYSCTL_OUT(req, "busy", sizeof("busy"));
1193         default:
1194                 return (0);
1195         }
1196 }
1197
1198 static void
1199 device_register_oids(device_t dev)
1200 {
1201         struct sysctl_oid* oid;
1202
1203         oid = &dev->oid[0];
1204         bzero(oid, sizeof(*oid));
1205         oid->oid_parent = &sysctl__hw_devices_children;
1206         oid->oid_number = OID_AUTO;
1207         oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW;
1208         oid->oid_arg1 = &dev->oidlist[0];
1209         oid->oid_arg2 = 0;
1210         oid->oid_name = dev->nameunit;
1211         oid->oid_handler = 0;
1212         oid->oid_fmt = "N";
1213         SLIST_INIT(&dev->oidlist[0]);
1214         sysctl_register_oid(oid);
1215
1216         oid = &dev->oid[1];
1217         bzero(oid, sizeof(*oid));
1218         oid->oid_parent = &dev->oidlist[0];
1219         oid->oid_number = OID_AUTO;
1220         oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD;
1221         oid->oid_arg1 = dev->desc ? dev->desc : "";
1222         oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0;
1223         oid->oid_name = "desc";
1224         oid->oid_handler = sysctl_handle_string;
1225         oid->oid_fmt = "A";
1226         sysctl_register_oid(oid);
1227
1228         oid = &dev->oid[2];
1229         bzero(oid, sizeof(*oid));
1230         oid->oid_parent = &dev->oidlist[0];
1231         oid->oid_number = OID_AUTO;
1232         oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
1233         oid->oid_arg1 = dev;
1234         oid->oid_arg2 = 0;
1235         oid->oid_name = "children";
1236         oid->oid_handler = sysctl_handle_children;
1237         oid->oid_fmt = "A";
1238         sysctl_register_oid(oid);
1239
1240         oid = &dev->oid[3];
1241         bzero(oid, sizeof(*oid));
1242         oid->oid_parent = &dev->oidlist[0];
1243         oid->oid_number = OID_AUTO;
1244         oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD;
1245         oid->oid_arg1 = dev;
1246         oid->oid_arg2 = 0;
1247         oid->oid_name = "state";
1248         oid->oid_handler = sysctl_handle_state;
1249         oid->oid_fmt = "A";
1250         sysctl_register_oid(oid);
1251 }
1252
1253 static void
1254 device_unregister_oids(device_t dev)
1255 {
1256         sysctl_unregister_oid(&dev->oid[0]);
1257         sysctl_unregister_oid(&dev->oid[1]);
1258         sysctl_unregister_oid(&dev->oid[2]);
1259 }
1260
1261 #endif
1262
1263 /*======================================*/
1264 /*
1265  * Access functions for device resources.
1266  */
1267
1268 /* Supplied by config(8) in ioconf.c */
1269 extern struct config_device config_devtab[];
1270 extern int devtab_count;
1271
1272 /* Runtime version */
1273 struct config_device *devtab = config_devtab;
1274
1275 static int
1276 resource_new_name(const char *name, int unit)
1277 {
1278         struct config_device *new;
1279
1280         new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP,
1281                      M_INTWAIT | M_ZERO);
1282         if (new == NULL)
1283                 return(-1);
1284         if (devtab && devtab_count > 0)
1285                 bcopy(devtab, new, devtab_count * sizeof(*new));
1286         new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_INTWAIT);
1287         if (new[devtab_count].name == NULL) {
1288                 free(new, M_TEMP);
1289                 return(-1);
1290         }
1291         strcpy(new[devtab_count].name, name);
1292         new[devtab_count].unit = unit;
1293         new[devtab_count].resource_count = 0;
1294         new[devtab_count].resources = NULL;
1295         if (devtab && devtab != config_devtab)
1296                 free(devtab, M_TEMP);
1297         devtab = new;
1298         return devtab_count++;
1299 }
1300
1301 static int
1302 resource_new_resname(int j, const char *resname, resource_type type)
1303 {
1304         struct config_resource *new;
1305         int i;
1306
1307         i = devtab[j].resource_count;
1308         new = malloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO);
1309         if (new == NULL)
1310                 return(-1);
1311         if (devtab[j].resources && i > 0)
1312                 bcopy(devtab[j].resources, new, i * sizeof(*new));
1313         new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_INTWAIT);
1314         if (new[i].name == NULL) {
1315                 free(new, M_TEMP);
1316                 return(-1);
1317         }
1318         strcpy(new[i].name, resname);
1319         new[i].type = type;
1320         if (devtab[j].resources)
1321                 free(devtab[j].resources, M_TEMP);
1322         devtab[j].resources = new;
1323         devtab[j].resource_count = i + 1;
1324         return(i);
1325 }
1326
1327 static int
1328 resource_match_string(int i, const char *resname, const char *value)
1329 {
1330         int j;
1331         struct config_resource *res;
1332
1333         for (j = 0, res = devtab[i].resources;
1334              j < devtab[i].resource_count; j++, res++)
1335                 if (!strcmp(res->name, resname)
1336                     && res->type == RES_STRING
1337                     && !strcmp(res->u.stringval, value))
1338                         return(j);
1339         return(-1);
1340 }
1341
1342 static int
1343 resource_find(const char *name, int unit, const char *resname,
1344               struct config_resource **result)
1345 {
1346         int i, j;
1347         struct config_resource *res;
1348
1349         /*
1350          * First check specific instances, then generic.
1351          */
1352         for (i = 0; i < devtab_count; i++) {
1353                 if (devtab[i].unit < 0)
1354                         continue;
1355                 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1356                         res = devtab[i].resources;
1357                         for (j = 0; j < devtab[i].resource_count; j++, res++)
1358                                 if (!strcmp(res->name, resname)) {
1359                                         *result = res;
1360                                         return(0);
1361                                 }
1362                 }
1363         }
1364         for (i = 0; i < devtab_count; i++) {
1365                 if (devtab[i].unit >= 0)
1366                         continue;
1367                 /* XXX should this `&& devtab[i].unit == unit' be here? */
1368                 /* XXX if so, then the generic match does nothing */
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         return(ENOENT);
1379 }
1380
1381 int
1382 resource_int_value(const char *name, int unit, const char *resname, int *result)
1383 {
1384         int error;
1385         struct config_resource *res;
1386
1387         if ((error = resource_find(name, unit, resname, &res)) != 0)
1388                 return(error);
1389         if (res->type != RES_INT)
1390                 return(EFTYPE);
1391         *result = res->u.intval;
1392         return(0);
1393 }
1394
1395 int
1396 resource_long_value(const char *name, int unit, const char *resname,
1397                     long *result)
1398 {
1399         int error;
1400         struct config_resource *res;
1401
1402         if ((error = resource_find(name, unit, resname, &res)) != 0)
1403                 return(error);
1404         if (res->type != RES_LONG)
1405                 return(EFTYPE);
1406         *result = res->u.longval;
1407         return(0);
1408 }
1409
1410 int
1411 resource_string_value(const char *name, int unit, const char *resname,
1412                       char **result)
1413 {
1414         int error;
1415         struct config_resource *res;
1416
1417         if ((error = resource_find(name, unit, resname, &res)) != 0)
1418                 return(error);
1419         if (res->type != RES_STRING)
1420                 return(EFTYPE);
1421         *result = res->u.stringval;
1422         return(0);
1423 }
1424
1425 int
1426 resource_query_string(int i, const char *resname, const char *value)
1427 {
1428         if (i < 0)
1429                 i = 0;
1430         else
1431                 i = i + 1;
1432         for (; i < devtab_count; i++)
1433                 if (resource_match_string(i, resname, value) >= 0)
1434                         return(i);
1435         return(-1);
1436 }
1437
1438 int
1439 resource_locate(int i, const char *resname)
1440 {
1441         if (i < 0)
1442                 i = 0;
1443         else
1444                 i = i + 1;
1445         for (; i < devtab_count; i++)
1446                 if (!strcmp(devtab[i].name, resname))
1447                         return(i);
1448         return(-1);
1449 }
1450
1451 int
1452 resource_count(void)
1453 {
1454         return(devtab_count);
1455 }
1456
1457 char *
1458 resource_query_name(int i)
1459 {
1460         return(devtab[i].name);
1461 }
1462
1463 int
1464 resource_query_unit(int i)
1465 {
1466         return(devtab[i].unit);
1467 }
1468
1469 static int
1470 resource_create(const char *name, int unit, const char *resname,
1471                 resource_type type, struct config_resource **result)
1472 {
1473         int i, j;
1474         struct config_resource *res = NULL;
1475
1476         for (i = 0; i < devtab_count; i++)
1477                 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
1478                         res = devtab[i].resources;
1479                         break;
1480                 }
1481         if (res == NULL) {
1482                 i = resource_new_name(name, unit);
1483                 if (i < 0)
1484                         return(ENOMEM);
1485                 res = devtab[i].resources;
1486         }
1487         for (j = 0; j < devtab[i].resource_count; j++, res++)
1488                 if (!strcmp(res->name, resname)) {
1489                         *result = res;
1490                         return(0);
1491                 }
1492         j = resource_new_resname(i, resname, type);
1493         if (j < 0)
1494                 return(ENOMEM);
1495         res = &devtab[i].resources[j];
1496         *result = res;
1497         return(0);
1498 }
1499
1500 int
1501 resource_set_int(const char *name, int unit, const char *resname, int value)
1502 {
1503         int error;
1504         struct config_resource *res;
1505
1506         error = resource_create(name, unit, resname, RES_INT, &res);
1507         if (error)
1508                 return(error);
1509         if (res->type != RES_INT)
1510                 return(EFTYPE);
1511         res->u.intval = value;
1512         return(0);
1513 }
1514
1515 int
1516 resource_set_long(const char *name, int unit, const char *resname, long value)
1517 {
1518         int error;
1519         struct config_resource *res;
1520
1521         error = resource_create(name, unit, resname, RES_LONG, &res);
1522         if (error)
1523                 return(error);
1524         if (res->type != RES_LONG)
1525                 return(EFTYPE);
1526         res->u.longval = value;
1527         return(0);
1528 }
1529
1530 int
1531 resource_set_string(const char *name, int unit, const char *resname,
1532                     const char *value)
1533 {
1534         int error;
1535         struct config_resource *res;
1536
1537         error = resource_create(name, unit, resname, RES_STRING, &res);
1538         if (error)
1539                 return(error);
1540         if (res->type != RES_STRING)
1541                 return(EFTYPE);
1542         if (res->u.stringval)
1543                 free(res->u.stringval, M_TEMP);
1544         res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_INTWAIT);
1545         if (res->u.stringval == NULL)
1546                 return(ENOMEM);
1547         strcpy(res->u.stringval, value);
1548         return(0);
1549 }
1550
1551 static void
1552 resource_cfgload(void *dummy __unused)
1553 {
1554         struct config_resource *res, *cfgres;
1555         int i, j;
1556         int error;
1557         char *name, *resname;
1558         int unit;
1559         resource_type type;
1560         char *stringval;
1561         int config_devtab_count;
1562
1563         config_devtab_count = devtab_count;
1564         devtab = NULL;
1565         devtab_count = 0;
1566
1567         for (i = 0; i < config_devtab_count; i++) {
1568                 name = config_devtab[i].name;
1569                 unit = config_devtab[i].unit;
1570
1571                 for (j = 0; j < config_devtab[i].resource_count; j++) {
1572                         cfgres = config_devtab[i].resources;
1573                         resname = cfgres[j].name;
1574                         type = cfgres[j].type;
1575                         error = resource_create(name, unit, resname, type,
1576                                                 &res);
1577                         if (error) {
1578                                 printf("create resource %s%d: error %d\n",
1579                                         name, unit, error);
1580                                 continue;
1581                         }
1582                         if (res->type != type) {
1583                                 printf("type mismatch %s%d: %d != %d\n",
1584                                         name, unit, res->type, type);
1585                                 continue;
1586                         }
1587                         switch (type) {
1588                         case RES_INT:
1589                                 res->u.intval = cfgres[j].u.intval;
1590                                 break;
1591                         case RES_LONG:
1592                                 res->u.longval = cfgres[j].u.longval;
1593                                 break;
1594                         case RES_STRING:
1595                                 if (res->u.stringval)
1596                                         free(res->u.stringval, M_TEMP);
1597                                 stringval = cfgres[j].u.stringval;
1598                                 res->u.stringval = malloc(strlen(stringval) + 1,
1599                                                           M_TEMP, M_INTWAIT);
1600                                 if (res->u.stringval == NULL)
1601                                         break;
1602                                 strcpy(res->u.stringval, stringval);
1603                                 break;
1604                         default:
1605                                 panic("unknown resource type %d", type);
1606                         }
1607                 }
1608         }
1609 }
1610 SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0)
1611
1612
1613 /*======================================*/
1614 /*
1615  * Some useful method implementations to make life easier for bus drivers.
1616  */
1617
1618 void
1619 resource_list_init(struct resource_list *rl)
1620 {
1621         SLIST_INIT(rl);
1622 }
1623
1624 void
1625 resource_list_free(struct resource_list *rl)
1626 {
1627         struct resource_list_entry *rle;
1628
1629         while ((rle = SLIST_FIRST(rl)) != NULL) {
1630                 if (rle->res)
1631                         panic("resource_list_free: resource entry is busy");
1632                 SLIST_REMOVE_HEAD(rl, link);
1633                 free(rle, M_BUS);
1634         }
1635 }
1636
1637 void
1638 resource_list_add(struct resource_list *rl,
1639                   int type, int rid,
1640                   u_long start, u_long end, u_long count)
1641 {
1642         struct resource_list_entry *rle;
1643
1644         rle = resource_list_find(rl, type, rid);
1645         if (rle == NULL) {
1646                 rle = malloc(sizeof(struct resource_list_entry), M_BUS,
1647                              M_INTWAIT);
1648                 if (!rle)
1649                         panic("resource_list_add: can't record entry");
1650                 SLIST_INSERT_HEAD(rl, rle, link);
1651                 rle->type = type;
1652                 rle->rid = rid;
1653                 rle->res = NULL;
1654         }
1655
1656         if (rle->res)
1657                 panic("resource_list_add: resource entry is busy");
1658
1659         rle->start = start;
1660         rle->end = end;
1661         rle->count = count;
1662 }
1663
1664 struct resource_list_entry*
1665 resource_list_find(struct resource_list *rl,
1666                    int type, int rid)
1667 {
1668         struct resource_list_entry *rle;
1669
1670         SLIST_FOREACH(rle, rl, link)
1671                 if (rle->type == type && rle->rid == rid)
1672                         return(rle);
1673         return(NULL);
1674 }
1675
1676 void
1677 resource_list_delete(struct resource_list *rl,
1678                      int type, int rid)
1679 {
1680         struct resource_list_entry *rle = resource_list_find(rl, type, rid);
1681
1682         if (rle) {
1683                 SLIST_REMOVE(rl, rle, resource_list_entry, link);
1684                 free(rle, M_BUS);
1685         }
1686 }
1687
1688 struct resource *
1689 resource_list_alloc(struct resource_list *rl,
1690                     device_t bus, device_t child,
1691                     int type, int *rid,
1692                     u_long start, u_long end,
1693                     u_long count, u_int flags)
1694 {
1695         struct resource_list_entry *rle = 0;
1696         int passthrough = (device_get_parent(child) != bus);
1697         int isdefault = (start == 0UL && end == ~0UL);
1698
1699         if (passthrough) {
1700                 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
1701                                           type, rid,
1702                                           start, end, count, flags));
1703         }
1704
1705         rle = resource_list_find(rl, type, *rid);
1706
1707         if (!rle)
1708                 return(0);              /* no resource of that type/rid */
1709         if (rle->res)
1710                 panic("resource_list_alloc: resource entry is busy");
1711
1712         if (isdefault) {
1713                 start = rle->start;
1714                 count = max(count, rle->count);
1715                 end = max(rle->end, start + count - 1);
1716         }
1717
1718         rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
1719                                       type, rid, start, end, count, flags);
1720
1721         /*
1722          * Record the new range.
1723          */
1724         if (rle->res) {
1725                 rle->start = rman_get_start(rle->res);
1726                 rle->end = rman_get_end(rle->res);
1727                 rle->count = count;
1728         }
1729
1730         return(rle->res);
1731 }
1732
1733 int
1734 resource_list_release(struct resource_list *rl,
1735                       device_t bus, device_t child,
1736                       int type, int rid, struct resource *res)
1737 {
1738         struct resource_list_entry *rle = 0;
1739         int passthrough = (device_get_parent(child) != bus);
1740         int error;
1741
1742         if (passthrough) {
1743                 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
1744                                             type, rid, res));
1745         }
1746
1747         rle = resource_list_find(rl, type, rid);
1748
1749         if (!rle)
1750                 panic("resource_list_release: can't find resource");
1751         if (!rle->res)
1752                 panic("resource_list_release: resource entry is not busy");
1753
1754         error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
1755                                      type, rid, res);
1756         if (error)
1757                 return(error);
1758
1759         rle->res = NULL;
1760         return(0);
1761 }
1762
1763 int
1764 resource_list_print_type(struct resource_list *rl, const char *name, int type,
1765                          const char *format)
1766 {
1767         struct resource_list_entry *rle;
1768         int printed, retval;
1769
1770         printed = 0;
1771         retval = 0;
1772         /* Yes, this is kinda cheating */
1773         SLIST_FOREACH(rle, rl, link) {
1774                 if (rle->type == type) {
1775                         if (printed == 0)
1776                                 retval += printf(" %s ", name);
1777                         else
1778                                 retval += printf(",");
1779                         printed++;
1780                         retval += printf(format, rle->start);
1781                         if (rle->count > 1) {
1782                                 retval += printf("-");
1783                                 retval += printf(format, rle->start +
1784                                                  rle->count - 1);
1785                         }
1786                 }
1787         }
1788         return(retval);
1789 }
1790
1791 /*
1792  * Call DEVICE_IDENTIFY for each driver.
1793  */
1794 int
1795 bus_generic_probe(device_t dev)
1796 {
1797         devclass_t dc = dev->devclass;
1798         driverlink_t dl;
1799
1800         TAILQ_FOREACH(dl, &dc->drivers, link)
1801                 DEVICE_IDENTIFY(dl->driver, dev);
1802
1803         return(0);
1804 }
1805
1806 int
1807 bus_generic_attach(device_t dev)
1808 {
1809         device_t child;
1810
1811         TAILQ_FOREACH(child, &dev->children, link)
1812                 device_probe_and_attach(child);
1813
1814         return(0);
1815 }
1816
1817 int
1818 bus_generic_detach(device_t dev)
1819 {
1820         device_t child;
1821         int error;
1822
1823         if (dev->state != DS_ATTACHED)
1824                 return(EBUSY);
1825
1826         TAILQ_FOREACH(child, &dev->children, link)
1827                 if ((error = device_detach(child)) != 0)
1828                         return(error);
1829
1830         return 0;
1831 }
1832
1833 int
1834 bus_generic_shutdown(device_t dev)
1835 {
1836         device_t child;
1837
1838         TAILQ_FOREACH(child, &dev->children, link)
1839                 device_shutdown(child);
1840
1841         return(0);
1842 }
1843
1844 int
1845 bus_generic_suspend(device_t dev)
1846 {
1847         int error;
1848         device_t child, child2;
1849
1850         TAILQ_FOREACH(child, &dev->children, link) {
1851                 error = DEVICE_SUSPEND(child);
1852                 if (error) {
1853                         for (child2 = TAILQ_FIRST(&dev->children);
1854                              child2 && child2 != child;
1855                              child2 = TAILQ_NEXT(child2, link))
1856                                 DEVICE_RESUME(child2);
1857                         return(error);
1858                 }
1859         }
1860         return(0);
1861 }
1862
1863 int
1864 bus_generic_resume(device_t dev)
1865 {
1866         device_t child;
1867
1868         TAILQ_FOREACH(child, &dev->children, link)
1869                 DEVICE_RESUME(child);
1870                 /* if resume fails, there's nothing we can usefully do... */
1871
1872         return(0);
1873 }
1874
1875 int
1876 bus_print_child_header(device_t dev, device_t child)
1877 {
1878         int retval = 0;
1879
1880         if (device_get_desc(child))
1881                 retval += device_printf(child, "<%s>", device_get_desc(child));
1882         else
1883                 retval += printf("%s", device_get_nameunit(child));
1884         if (bootverbose) {
1885                 if (child->state != DS_ATTACHED)
1886                         printf(" [tentative]");
1887                 else
1888                         printf(" [attached!]");
1889         }
1890         return(retval);
1891 }
1892
1893 int
1894 bus_print_child_footer(device_t dev, device_t child)
1895 {
1896         return(printf(" on %s\n", device_get_nameunit(dev)));
1897 }
1898
1899 int
1900 bus_generic_print_child(device_t dev, device_t child)
1901 {
1902         int retval = 0;
1903
1904         retval += bus_print_child_header(dev, child);
1905         retval += bus_print_child_footer(dev, child);
1906
1907         return(retval);
1908 }
1909
1910 int
1911 bus_generic_read_ivar(device_t dev, device_t child, int index,
1912                       uintptr_t * result)
1913 {
1914     return(ENOENT);
1915 }
1916
1917 int
1918 bus_generic_write_ivar(device_t dev, device_t child, int index,
1919                        uintptr_t value)
1920 {
1921     return(ENOENT);
1922 }
1923
1924 struct resource_list *
1925 bus_generic_get_resource_list(device_t dev, device_t child)
1926 {
1927     return(NULL);
1928 }
1929
1930 void
1931 bus_generic_driver_added(device_t dev, driver_t *driver)
1932 {
1933         device_t child;
1934
1935         DEVICE_IDENTIFY(driver, dev);
1936         TAILQ_FOREACH(child, &dev->children, link)
1937                 if (child->state == DS_NOTPRESENT)
1938                         device_probe_and_attach(child);
1939 }
1940
1941 int
1942 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
1943                        int flags, driver_intr_t *intr, void *arg,
1944                        void **cookiep)
1945 {
1946         /* Propagate up the bus hierarchy until someone handles it. */
1947         if (dev->parent)
1948                 return(BUS_SETUP_INTR(dev->parent, child, irq, flags,
1949                                       intr, arg, cookiep));
1950         else
1951                 return(EINVAL);
1952 }
1953
1954 int
1955 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
1956                           void *cookie)
1957 {
1958         /* Propagate up the bus hierarchy until someone handles it. */
1959         if (dev->parent)
1960                 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
1961         else
1962                 return(EINVAL);
1963 }
1964
1965 struct resource *
1966 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
1967                            u_long start, u_long end, u_long count, u_int flags)
1968 {
1969         /* Propagate up the bus hierarchy until someone handles it. */
1970         if (dev->parent)
1971                 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
1972                                            start, end, count, flags));
1973         else
1974                 return(NULL);
1975 }
1976
1977 int
1978 bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
1979                              struct resource *r)
1980 {
1981         /* Propagate up the bus hierarchy until someone handles it. */
1982         if (dev->parent)
1983                 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r));
1984         else
1985                 return(EINVAL);
1986 }
1987
1988 int
1989 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
1990                               struct resource *r)
1991 {
1992         /* Propagate up the bus hierarchy until someone handles it. */
1993         if (dev->parent)
1994                 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r));
1995         else
1996                 return(EINVAL);
1997 }
1998
1999 int
2000 bus_generic_deactivate_resource(device_t dev, device_t child, int type,
2001                                 int rid, struct resource *r)
2002 {
2003         /* Propagate up the bus hierarchy until someone handles it. */
2004         if (dev->parent)
2005                 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
2006                                                r));
2007         else
2008                 return(EINVAL);
2009 }
2010
2011 int
2012 bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig,
2013     enum intr_polarity pol)
2014 {
2015         /* Propagate up the bus hierarchy until someone handles it. */
2016         if (dev->parent)
2017                 return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol));
2018         else
2019                 return(EINVAL);
2020 }
2021
2022 int
2023 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid,
2024     u_long *startp, u_long *countp)
2025 {
2026         struct resource_list *rl = NULL;
2027         struct resource_list_entry *rle = NULL;
2028
2029         rl = BUS_GET_RESOURCE_LIST(dev, child);
2030         if (!rl)
2031                 return(EINVAL);
2032
2033         rle = resource_list_find(rl, type, rid);
2034         if (!rle)
2035                 return(ENOENT);
2036
2037         if (startp)
2038                 *startp = rle->start;
2039         if (countp)
2040                 *countp = rle->count;
2041
2042         return(0);
2043 }
2044
2045 int
2046 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid,
2047     u_long start, u_long count)
2048 {
2049         struct resource_list *rl = NULL;
2050
2051         rl = BUS_GET_RESOURCE_LIST(dev, child);
2052         if (!rl)
2053                 return(EINVAL);
2054
2055         resource_list_add(rl, type, rid, start, (start + count - 1), count);
2056
2057         return(0);
2058 }
2059
2060 void
2061 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid)
2062 {
2063         struct resource_list *rl = NULL;
2064
2065         rl = BUS_GET_RESOURCE_LIST(dev, child);
2066         if (!rl)
2067                 return;
2068
2069         resource_list_delete(rl, type, rid);
2070 }
2071
2072 int
2073 bus_generic_rl_release_resource(device_t dev, device_t child, int type,
2074     int rid, struct resource *r)
2075 {
2076         struct resource_list *rl = NULL;
2077
2078         rl = BUS_GET_RESOURCE_LIST(dev, child);
2079         if (!rl)
2080                 return(EINVAL);
2081
2082         return(resource_list_release(rl, dev, child, type, rid, r));
2083 }
2084
2085 struct resource *
2086 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type,
2087     int *rid, u_long start, u_long end, u_long count, u_int flags)
2088 {
2089         struct resource_list *rl = NULL;
2090
2091         rl = BUS_GET_RESOURCE_LIST(dev, child);
2092         if (!rl)
2093                 return(NULL);
2094
2095         return(resource_list_alloc(rl, dev, child, type, rid,
2096             start, end, count, flags));
2097 }
2098
2099 int
2100 bus_generic_child_present(device_t bus, device_t child)
2101 {
2102         return(BUS_CHILD_PRESENT(device_get_parent(bus), bus));
2103 }
2104
2105
2106 /*
2107  * Some convenience functions to make it easier for drivers to use the
2108  * resource-management functions.  All these really do is hide the
2109  * indirection through the parent's method table, making for slightly
2110  * less-wordy code.  In the future, it might make sense for this code
2111  * to maintain some sort of a list of resources allocated by each device.
2112  */
2113 struct resource *
2114 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
2115                    u_long count, u_int flags)
2116 {
2117         if (dev->parent == 0)
2118                 return(0);
2119         return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
2120                                   count, flags));
2121 }
2122
2123 int
2124 bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
2125 {
2126         if (dev->parent == 0)
2127                 return(EINVAL);
2128         return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2129 }
2130
2131 int
2132 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
2133 {
2134         if (dev->parent == 0)
2135                 return(EINVAL);
2136         return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
2137 }
2138
2139 int
2140 bus_release_resource(device_t dev, int type, int rid, struct resource *r)
2141 {
2142         if (dev->parent == 0)
2143                 return(EINVAL);
2144         return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
2145 }
2146
2147 int
2148 bus_setup_intr(device_t dev, struct resource *r, int flags,
2149                driver_intr_t handler, void *arg, void **cookiep)
2150 {
2151         if (dev->parent == 0)
2152                 return(EINVAL);
2153         return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg,
2154                cookiep));
2155 }
2156
2157 int
2158 bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
2159 {
2160         if (dev->parent == 0)
2161                 return(EINVAL);
2162         return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
2163 }
2164
2165 int
2166 bus_set_resource(device_t dev, int type, int rid,
2167                  u_long start, u_long count)
2168 {
2169         return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
2170                                 start, count));
2171 }
2172
2173 int
2174 bus_get_resource(device_t dev, int type, int rid,
2175                  u_long *startp, u_long *countp)
2176 {
2177         return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2178                                 startp, countp));
2179 }
2180
2181 u_long
2182 bus_get_resource_start(device_t dev, int type, int rid)
2183 {
2184         u_long start, count;
2185         int error;
2186
2187         error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2188                                  &start, &count);
2189         if (error)
2190                 return(0);
2191         return(start);
2192 }
2193
2194 u_long
2195 bus_get_resource_count(device_t dev, int type, int rid)
2196 {
2197         u_long start, count;
2198         int error;
2199
2200         error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
2201                                  &start, &count);
2202         if (error)
2203                 return(0);
2204         return(count);
2205 }
2206
2207 void
2208 bus_delete_resource(device_t dev, int type, int rid)
2209 {
2210         BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
2211 }
2212
2213 int
2214 bus_child_present(device_t child)
2215 {
2216         return (BUS_CHILD_PRESENT(device_get_parent(child), child));
2217 }
2218
2219 int
2220 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
2221 {
2222         device_t parent;
2223
2224         parent = device_get_parent(child);
2225         if (parent == NULL) {
2226                 *buf = '\0';
2227                 return (0);
2228         }
2229         return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
2230 }
2231
2232 int
2233 bus_child_location_str(device_t child, char *buf, size_t buflen)
2234 {
2235         device_t parent;
2236
2237         parent = device_get_parent(child);
2238         if (parent == NULL) {
2239                 *buf = '\0';
2240                 return (0);
2241         }
2242         return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
2243 }
2244
2245 static int
2246 root_print_child(device_t dev, device_t child)
2247 {
2248         return(0);
2249 }
2250
2251 static int
2252 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
2253                 void **cookiep)
2254 {
2255         /*
2256          * If an interrupt mapping gets to here something bad has happened.
2257          */
2258         panic("root_setup_intr");
2259 }
2260
2261 /*
2262  * If we get here, assume that the device is permanant and really is
2263  * present in the system.  Removable bus drivers are expected to intercept
2264  * this call long before it gets here.  We return -1 so that drivers that
2265  * really care can check vs -1 or some ERRNO returned higher in the food
2266  * chain.
2267  */
2268 static int
2269 root_child_present(device_t dev, device_t child)
2270 {
2271         return(-1);
2272 }
2273
2274 /*
2275  * XXX NOTE! other defaults may be set in bus_if.m
2276  */
2277 static kobj_method_t root_methods[] = {
2278         /* Device interface */
2279         KOBJMETHOD(device_shutdown,     bus_generic_shutdown),
2280         KOBJMETHOD(device_suspend,      bus_generic_suspend),
2281         KOBJMETHOD(device_resume,       bus_generic_resume),
2282
2283         /* Bus interface */
2284         KOBJMETHOD(bus_print_child,     root_print_child),
2285         KOBJMETHOD(bus_read_ivar,       bus_generic_read_ivar),
2286         KOBJMETHOD(bus_write_ivar,      bus_generic_write_ivar),
2287         KOBJMETHOD(bus_setup_intr,      root_setup_intr),
2288         KOBJMETHOD(bus_child_present,   root_child_present),
2289
2290         { 0, 0 }
2291 };
2292
2293 static driver_t root_driver = {
2294         "root",
2295         root_methods,
2296         1,                      /* no softc */
2297 };
2298
2299 device_t        root_bus;
2300 devclass_t      root_devclass;
2301
2302 static int
2303 root_bus_module_handler(module_t mod, int what, void* arg)
2304 {
2305         switch (what) {
2306         case MOD_LOAD:
2307                 root_bus = make_device(NULL, "root", 0);
2308                 root_bus->desc = "System root bus";
2309                 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
2310                 root_bus->driver = &root_driver;
2311                 root_bus->state = DS_ATTACHED;
2312                 root_devclass = devclass_find_internal("root", NULL, FALSE);
2313                 return(0);
2314
2315         case MOD_SHUTDOWN:
2316                 device_shutdown(root_bus);
2317                 return(0);
2318         default:
2319                 return(0);
2320         }
2321 }
2322
2323 static moduledata_t root_bus_mod = {
2324         "rootbus",
2325         root_bus_module_handler,
2326         0
2327 };
2328 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
2329
2330 void
2331 root_bus_configure(void)
2332 {
2333         device_t dev;
2334
2335         PDEBUG(("."));
2336
2337         TAILQ_FOREACH(dev, &root_bus->children, link)
2338                 device_probe_and_attach(dev);
2339 }
2340
2341 int
2342 driver_module_handler(module_t mod, int what, void *arg)
2343 {
2344         int error;
2345         struct driver_module_data *dmd;
2346         devclass_t bus_devclass;
2347         kobj_class_t driver;
2348         const char *parentname;
2349
2350         dmd = (struct driver_module_data *)arg;
2351         bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE);
2352         error = 0;
2353
2354         switch (what) {
2355         case MOD_LOAD:
2356                 if (dmd->dmd_chainevh)
2357                         error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
2358
2359                 driver = dmd->dmd_driver;
2360                 PDEBUG(("Loading module: driver %s on bus %s",
2361                         DRIVERNAME(driver), dmd->dmd_busname));
2362                 error = devclass_add_driver(bus_devclass, driver);
2363                 if (error)
2364                         break;
2365
2366                 /*
2367                  * If the driver has any base classes, make the
2368                  * devclass inherit from the devclass of the driver's
2369                  * first base class. This will allow the system to
2370                  * search for drivers in both devclasses for children
2371                  * of a device using this driver.
2372                  */
2373                 if (driver->baseclasses)
2374                         parentname = driver->baseclasses[0]->name;
2375                 else
2376                         parentname = NULL;
2377                 *dmd->dmd_devclass = devclass_find_internal(driver->name,
2378                                                             parentname, TRUE);
2379                 break;
2380
2381         case MOD_UNLOAD:
2382                 PDEBUG(("Unloading module: driver %s from bus %s",
2383                         DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname));
2384                 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver);
2385
2386                 if (!error && dmd->dmd_chainevh)
2387                         error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
2388                 break;
2389         }
2390
2391         return (error);
2392 }
2393
2394 #ifdef BUS_DEBUG
2395
2396 /*
2397  * The _short versions avoid iteration by not calling anything that prints
2398  * more than oneliners. I love oneliners.
2399  */
2400
2401 static void
2402 print_device_short(device_t dev, int indent)
2403 {
2404         if (!dev)
2405                 return;
2406
2407         indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
2408                       dev->unit, dev->desc,
2409                       (dev->parent? "":"no "),
2410                       (TAILQ_EMPTY(&dev->children)? "no ":""),
2411                       (dev->flags&DF_ENABLED? "enabled,":"disabled,"),
2412                       (dev->flags&DF_FIXEDCLASS? "fixed,":""),
2413                       (dev->flags&DF_WILDCARD? "wildcard,":""),
2414                       (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
2415                       (dev->ivars? "":"no "),
2416                       (dev->softc? "":"no "),
2417                       dev->busy));
2418 }
2419
2420 static void
2421 print_device(device_t dev, int indent)
2422 {
2423         if (!dev)
2424                 return;
2425
2426         print_device_short(dev, indent);
2427
2428         indentprintf(("Parent:\n"));
2429         print_device_short(dev->parent, indent+1);
2430         indentprintf(("Driver:\n"));
2431         print_driver_short(dev->driver, indent+1);
2432         indentprintf(("Devclass:\n"));
2433         print_devclass_short(dev->devclass, indent+1);
2434 }
2435
2436 /*
2437  * Print the device and all its children (indented).
2438  */
2439 void
2440 print_device_tree_short(device_t dev, int indent)
2441 {
2442         device_t child;
2443
2444         if (!dev)
2445                 return;
2446
2447         print_device_short(dev, indent);
2448
2449         TAILQ_FOREACH(child, &dev->children, link)
2450                 print_device_tree_short(child, indent+1);
2451 }
2452
2453 /*
2454  * Print the device and all its children (indented).
2455  */
2456 void
2457 print_device_tree(device_t dev, int indent)
2458 {
2459         device_t child;
2460
2461         if (!dev)
2462                 return;
2463
2464         print_device(dev, indent);
2465
2466         TAILQ_FOREACH(child, &dev->children, link)
2467                 print_device_tree(child, indent+1);
2468 }
2469
2470 static void
2471 print_driver_short(driver_t *driver, int indent)
2472 {
2473         if (!driver)
2474                 return;
2475
2476         indentprintf(("driver %s: softc size = %d\n",
2477                       driver->name, driver->size));
2478 }
2479
2480 static void
2481 print_driver(driver_t *driver, int indent)
2482 {
2483         if (!driver)
2484                 return;
2485
2486         print_driver_short(driver, indent);
2487 }
2488
2489
2490 static void
2491 print_driver_list(driver_list_t drivers, int indent)
2492 {
2493         driverlink_t driver;
2494
2495         TAILQ_FOREACH(driver, &drivers, link)
2496                 print_driver(driver->driver, indent);
2497 }
2498
2499 static void
2500 print_devclass_short(devclass_t dc, int indent)
2501 {
2502         if (!dc)
2503                 return;
2504
2505         indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
2506 }
2507
2508 static void
2509 print_devclass(devclass_t dc, int indent)
2510 {
2511         int i;
2512
2513         if (!dc)
2514                 return;
2515
2516         print_devclass_short(dc, indent);
2517         indentprintf(("Drivers:\n"));
2518         print_driver_list(dc->drivers, indent+1);
2519
2520         indentprintf(("Devices:\n"));
2521         for (i = 0; i < dc->maxunit; i++)
2522                 if (dc->devices[i])
2523                         print_device(dc->devices[i], indent+1);
2524 }
2525
2526 void
2527 print_devclass_list_short(void)
2528 {
2529         devclass_t dc;
2530
2531         printf("Short listing of devclasses, drivers & devices:\n");
2532         TAILQ_FOREACH(dc, &devclasses, link) {
2533                 print_devclass_short(dc, 0);
2534         }
2535 }
2536
2537 void
2538 print_devclass_list(void)
2539 {
2540         devclass_t dc;
2541
2542         printf("Full listing of devclasses, drivers & devices:\n");
2543         TAILQ_FOREACH(dc, &devclasses, link) {
2544                 print_devclass(dc, 0);
2545         }
2546 }
2547
2548 #endif
2549
2550 /*
2551  * Check to see if a device is disabled via a disabled hint.
2552  */
2553 int
2554 resource_disabled(const char *name, int unit)
2555 {
2556         int error, value;
2557
2558         error = resource_int_value(name, unit, "disabled", &value);
2559         if (error)
2560                return(0);
2561         return(value);
2562 }