subr_bus.c revision 59312
1/*- 2 * Copyright (c) 1997,1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/kern/subr_bus.c 59312 2000-04-17 04:30:48Z imp $ 27 */ 28 29#include "opt_bus.h" 30 31#include <sys/param.h> 32#include <sys/queue.h> 33#include <sys/malloc.h> 34#include <sys/kernel.h> 35#include <sys/module.h> 36#ifdef DEVICE_SYSCTLS 37#include <sys/sysctl.h> 38#endif 39#include <sys/kobj.h> 40#include <sys/bus_private.h> 41#include <sys/systm.h> 42#include <machine/bus.h> 43#include <sys/rman.h> 44#include <machine/stdarg.h> /* for device_printf() */ 45 46MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 47 48#ifdef BUS_DEBUG 49#define PDEBUG(a) (printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n")) 50#define DEVICENAME(d) ((d)? device_get_name(d): "no device") 51#define DRIVERNAME(d) ((d)? d->name : "no driver") 52#define DEVCLANAME(d) ((d)? d->name : "no devclass") 53 54/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 55 * prevent syslog from deleting initial spaces 56 */ 57#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while(0) 58 59static void print_method_list(device_method_t *m, int indent); 60static void print_device_short(device_t dev, int indent); 61static void print_device(device_t dev, int indent); 62void print_device_tree_short(device_t dev, int indent); 63void print_device_tree(device_t dev, int indent); 64static void print_driver_short(driver_t *driver, int indent); 65static void print_driver(driver_t *driver, int indent); 66static void print_driver_list(driver_list_t drivers, int indent); 67static void print_devclass_short(devclass_t dc, int indent); 68static void print_devclass(devclass_t dc, int indent); 69void print_devclass_list_short(void); 70void print_devclass_list(void); 71 72#else 73/* Make the compiler ignore the function calls */ 74#define PDEBUG(a) /* nop */ 75#define DEVICENAME(d) /* nop */ 76#define DRIVERNAME(d) /* nop */ 77#define DEVCLANAME(d) /* nop */ 78 79#define print_method_list(m,i) /* nop */ 80#define print_device_short(d,i) /* nop */ 81#define print_device(d,i) /* nop */ 82#define print_device_tree_short(d,i) /* nop */ 83#define print_device_tree(d,i) /* nop */ 84#define print_driver_short(d,i) /* nop */ 85#define print_driver(d,i) /* nop */ 86#define print_driver_list(d,i) /* nop */ 87#define print_devclass_short(d,i) /* nop */ 88#define print_devclass(d,i) /* nop */ 89#define print_devclass_list_short() /* nop */ 90#define print_devclass_list() /* nop */ 91#endif 92 93#ifdef DEVICE_SYSCTLS 94static void device_register_oids(device_t dev); 95static void device_unregister_oids(device_t dev); 96#endif 97 98kobj_method_t null_methods[] = { 99 { 0, 0 } 100}; 101 102DEFINE_CLASS(null, null_methods, 0); 103 104/* 105 * Devclass implementation 106 */ 107 108static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 109 110static devclass_t 111devclass_find_internal(const char *classname, int create) 112{ 113 devclass_t dc; 114 115 PDEBUG(("looking for %s", classname)); 116 if (!classname) 117 return NULL; 118 119 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 120 if (!strcmp(dc->name, classname)) 121 return dc; 122 123 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 124 if (create) { 125 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 126 M_BUS, M_NOWAIT); 127 if (!dc) 128 return NULL; 129 bzero(dc, sizeof(struct devclass) + strlen(classname) + 1); 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 } 137 138 return dc; 139} 140 141devclass_t 142devclass_create(const char *classname) 143{ 144 return devclass_find_internal(classname, TRUE); 145} 146 147devclass_t 148devclass_find(const char *classname) 149{ 150 return devclass_find_internal(classname, FALSE); 151} 152 153int 154devclass_add_driver(devclass_t dc, driver_t *driver) 155{ 156 driverlink_t dl; 157 int i; 158 159 PDEBUG(("%s", DRIVERNAME(driver))); 160 161 dl = malloc(sizeof *dl, M_BUS, M_NOWAIT); 162 if (!dl) 163 return ENOMEM; 164 bzero(dl, sizeof *dl); 165 166 /* 167 * Compile the driver's methods. 168 */ 169 kobj_class_compile((kobj_class_t) driver); 170 171 /* 172 * Make sure the devclass which the driver is implementing exists. 173 */ 174 devclass_find_internal(driver->name, TRUE); 175 176 dl->driver = driver; 177 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 178 driver->refs++; 179 180 /* 181 * Call BUS_DRIVER_ADDED for any existing busses in this class. 182 */ 183 for (i = 0; i < dc->maxunit; i++) 184 if (dc->devices[i]) 185 BUS_DRIVER_ADDED(dc->devices[i], driver); 186 187 return 0; 188} 189 190int 191devclass_delete_driver(devclass_t busclass, driver_t *driver) 192{ 193 devclass_t dc = devclass_find(driver->name); 194 driverlink_t dl; 195 device_t dev; 196 int i; 197 int error; 198 199 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 200 201 if (!dc) 202 return 0; 203 204 /* 205 * Find the link structure in the bus' list of drivers. 206 */ 207 for (dl = TAILQ_FIRST(&busclass->drivers); dl; 208 dl = TAILQ_NEXT(dl, link)) { 209 if (dl->driver == driver) 210 break; 211 } 212 213 if (!dl) { 214 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 215 return ENOENT; 216 } 217 218 /* 219 * Disassociate from any devices. We iterate through all the 220 * devices in the devclass of the driver and detach any which are 221 * using the driver and which have a parent in the devclass which 222 * we are deleting from. 223 * 224 * Note that since a driver can be in multiple devclasses, we 225 * should not detach devices which are not children of devices in 226 * the affected devclass. 227 */ 228 for (i = 0; i < dc->maxunit; i++) { 229 if (dc->devices[i]) { 230 dev = dc->devices[i]; 231 if (dev->driver == driver 232 && dev->parent && dev->parent->devclass == busclass) { 233 if ((error = device_detach(dev)) != 0) 234 return error; 235 device_set_driver(dev, NULL); 236 } 237 } 238 } 239 240 TAILQ_REMOVE(&busclass->drivers, dl, link); 241 free(dl, M_BUS); 242 243 driver->refs--; 244 if (driver->refs == 0) 245 kobj_class_free((kobj_class_t) driver); 246 247 return 0; 248} 249 250static driverlink_t 251devclass_find_driver_internal(devclass_t dc, const char *classname) 252{ 253 driverlink_t dl; 254 255 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 256 257 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) { 258 if (!strcmp(dl->driver->name, classname)) 259 return dl; 260 } 261 262 PDEBUG(("not found")); 263 return NULL; 264} 265 266driver_t * 267devclass_find_driver(devclass_t dc, const char *classname) 268{ 269 driverlink_t dl; 270 271 dl = devclass_find_driver_internal(dc, classname); 272 if (dl) 273 return dl->driver; 274 else 275 return NULL; 276} 277 278const char * 279devclass_get_name(devclass_t dc) 280{ 281 return dc->name; 282} 283 284device_t 285devclass_get_device(devclass_t dc, int unit) 286{ 287 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 288 return NULL; 289 return dc->devices[unit]; 290} 291 292void * 293devclass_get_softc(devclass_t dc, int unit) 294{ 295 device_t dev; 296 297 dev = devclass_get_device(dc, unit); 298 if (!dev) 299 return (NULL); 300 301 return (device_get_softc(dev)); 302} 303 304int 305devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 306{ 307 int i; 308 int count; 309 device_t *list; 310 311 count = 0; 312 for (i = 0; i < dc->maxunit; i++) 313 if (dc->devices[i]) 314 count++; 315 316 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 317 if (!list) 318 return ENOMEM; 319 bzero(list, count * sizeof(device_t)); 320 321 count = 0; 322 for (i = 0; i < dc->maxunit; i++) 323 if (dc->devices[i]) { 324 list[count] = dc->devices[i]; 325 count++; 326 } 327 328 *devlistp = list; 329 *devcountp = count; 330 331 return 0; 332} 333 334int 335devclass_get_maxunit(devclass_t dc) 336{ 337 return dc->maxunit; 338} 339 340static int 341devclass_alloc_unit(devclass_t dc, int *unitp) 342{ 343 int unit = *unitp; 344 345 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 346 347 /* 348 * If we have been given a wired unit number, check for existing 349 * device. 350 */ 351 if (unit != -1) { 352 if (unit >= 0 && unit < dc->maxunit && dc->devices[unit] != NULL) { 353 if (bootverbose) 354 printf("%s-: %s%d exists, using next available unit number\n", 355 dc->name, dc->name, unit); 356 unit = -1; 357 } 358 } 359 360 /* 361 * We ended up with an unwired device, so let's find the next available 362 * slot for it. 363 */ 364 if (unit == -1) { 365 unit = 0; 366 while (unit < dc->maxunit && dc->devices[unit] != NULL) 367 unit++; 368 } 369 370 /* 371 * We've selected a unit beyond the length of the table, so let's extend 372 * the table to make room for all units up to and including this one. 373 */ 374 if (unit >= dc->maxunit) { 375 device_t *newlist; 376 int newsize; 377 378 newsize = (dc->maxunit ? 2 * dc->maxunit 379 : MINALLOCSIZE / sizeof(device_t)); 380 newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT); 381 if (!newlist) 382 return ENOMEM; 383 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 384 bzero(newlist + dc->maxunit, 385 sizeof(device_t) * (newsize - dc->maxunit)); 386 if (dc->devices) 387 free(dc->devices, M_BUS); 388 dc->devices = newlist; 389 dc->maxunit = newsize; 390 } 391 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 392 393 *unitp = unit; 394 return 0; 395} 396 397static int 398devclass_add_device(devclass_t dc, device_t dev) 399{ 400 int buflen, error; 401 402 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 403 404 buflen = strlen(dc->name) + 5; 405 dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT); 406 if (!dev->nameunit) 407 return ENOMEM; 408 bzero(dev->nameunit, buflen); 409 410 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 411 free(dev->nameunit, M_BUS); 412 dev->nameunit = NULL; 413 return error; 414 } 415 dc->devices[dev->unit] = dev; 416 dev->devclass = dc; 417 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 418 419#ifdef DEVICE_SYSCTLS 420 device_register_oids(dev); 421#endif 422 423 return 0; 424} 425 426static int 427devclass_delete_device(devclass_t dc, device_t dev) 428{ 429 if (!dc || !dev) 430 return 0; 431 432 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 433 434 if (dev->devclass != dc 435 || 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 451static device_t 452make_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) { 460 dc = devclass_find_internal(name, 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_NOWAIT); 469 if (!dev) 470 return 0; 471 bzero(dev, sizeof(struct device)); 472 473 dev->parent = parent; 474 TAILQ_INIT(&dev->children); 475 kobj_init((kobj_t) dev, &null_class); 476 dev->driver = NULL; 477 dev->devclass = NULL; 478 dev->unit = unit; 479 dev->nameunit = NULL; 480 dev->desc = NULL; 481 dev->busy = 0; 482 dev->devflags = 0; 483 dev->flags = DF_ENABLED; 484 dev->order = 0; 485 if (unit == -1) 486 dev->flags |= DF_WILDCARD; 487 if (name) { 488 dev->flags |= DF_FIXEDCLASS; 489 devclass_add_device(dc, dev); 490 } 491 dev->ivars = NULL; 492 dev->softc = NULL; 493 494 dev->state = DS_NOTPRESENT; 495 496 kobj_init((kobj_t) dev, &null_class); 497 498 return dev; 499} 500 501static int 502device_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 514device_t 515device_add_child(device_t dev, const char *name, int unit) 516{ 517 return device_add_child_ordered(dev, 0, name, unit); 518} 519 520device_t 521device_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", 527 name, DEVICENAME(dev), 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 555int 556device_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 free(child, M_BUS); 577 578 return 0; 579} 580 581/* 582 * Find only devices attached to this bus. 583 */ 584device_t 585device_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 600static driverlink_t 601first_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 609static driverlink_t 610next_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 622static int 623device_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 (dl = first_matching_driver(dc, child); 639 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 no higher match 651 * 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 certainly doesn't match. 661 */ 662 if (result > 0) { 663 device_set_driver(child, 0); 664 continue; 665 } 666 667 /* 668 * A priority lower than SUCCESS, remember the best matching 669 * driver. Initialise the value of pri for the first match. 670 */ 671 if (best == 0 || result > pri) { 672 best = dl; 673 pri = result; 674 continue; 675 } 676 } 677 678 /* 679 * If we found a driver, change state and initialise the devclass. 680 */ 681 if (best) { 682 if (!child->devclass) 683 device_set_devclass(child, best->driver->name); 684 device_set_driver(child, best->driver); 685 if (pri < 0) { 686 /* 687 * A bit bogus. Call the probe method again to make sure 688 * that we have the right description. 689 */ 690 DEVICE_PROBE(child); 691 } 692 child->state = DS_ALIVE; 693 return 0; 694 } 695 696 return ENXIO; 697} 698 699device_t 700device_get_parent(device_t dev) 701{ 702 return dev->parent; 703} 704 705int 706device_get_children(device_t dev, device_t **devlistp, int *devcountp) 707{ 708 int count; 709 device_t child; 710 device_t *list; 711 712 count = 0; 713 for (child = TAILQ_FIRST(&dev->children); child; 714 child = TAILQ_NEXT(child, link)) 715 count++; 716 717 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 718 if (!list) 719 return ENOMEM; 720 bzero(list, count * sizeof(device_t)); 721 722 count = 0; 723 for (child = TAILQ_FIRST(&dev->children); child; 724 child = TAILQ_NEXT(child, link)) { 725 list[count] = child; 726 count++; 727 } 728 729 *devlistp = list; 730 *devcountp = count; 731 732 return 0; 733} 734 735driver_t * 736device_get_driver(device_t dev) 737{ 738 return dev->driver; 739} 740 741devclass_t 742device_get_devclass(device_t dev) 743{ 744 return dev->devclass; 745} 746 747const char * 748device_get_name(device_t dev) 749{ 750 if (dev->devclass) 751 return devclass_get_name(dev->devclass); 752 return NULL; 753} 754 755const char * 756device_get_nameunit(device_t dev) 757{ 758 return dev->nameunit; 759} 760 761int 762device_get_unit(device_t dev) 763{ 764 return dev->unit; 765} 766 767const char * 768device_get_desc(device_t dev) 769{ 770 return dev->desc; 771} 772 773u_int32_t 774device_get_flags(device_t dev) 775{ 776 return dev->devflags; 777} 778 779int 780device_print_prettyname(device_t dev) 781{ 782 const char *name = device_get_name(dev); 783 784 if (name == 0) 785 return printf("unknown: "); 786 else 787 return printf("%s%d: ", name, device_get_unit(dev)); 788} 789 790int 791device_printf(device_t dev, const char * fmt, ...) 792{ 793 va_list ap; 794 int retval; 795 796 retval = device_print_prettyname(dev); 797 va_start(ap, fmt); 798 retval += vprintf(fmt, ap); 799 va_end(ap); 800 return retval; 801} 802 803static void 804device_set_desc_internal(device_t dev, const char* desc, int copy) 805{ 806 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 807 free(dev->desc, M_BUS); 808 dev->flags &= ~DF_DESCMALLOCED; 809 dev->desc = NULL; 810 } 811 812 if (copy && desc) { 813 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT); 814 if (dev->desc) { 815 strcpy(dev->desc, desc); 816 dev->flags |= DF_DESCMALLOCED; 817 } 818 } else 819 /* Avoid a -Wcast-qual warning */ 820 dev->desc = (char *)(uintptr_t) desc; 821 822#ifdef DEVICE_SYSCTLS 823 { 824 struct sysctl_oid *oid = &dev->oid[1]; 825 oid->oid_arg1 = dev->desc ? dev->desc : ""; 826 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 827 } 828#endif 829} 830 831void 832device_set_desc(device_t dev, const char* desc) 833{ 834 device_set_desc_internal(dev, desc, FALSE); 835} 836 837void 838device_set_desc_copy(device_t dev, const char* desc) 839{ 840 device_set_desc_internal(dev, desc, TRUE); 841} 842 843void 844device_set_flags(device_t dev, u_int32_t flags) 845{ 846 dev->devflags = flags; 847} 848 849void * 850device_get_softc(device_t dev) 851{ 852 return dev->softc; 853} 854 855void * 856device_get_ivars(device_t dev) 857{ 858 return dev->ivars; 859} 860 861void 862device_set_ivars(device_t dev, void * ivars) 863{ 864 if (!dev) 865 return; 866 867 dev->ivars = ivars; 868 869 return; 870} 871 872device_state_t 873device_get_state(device_t dev) 874{ 875 return dev->state; 876} 877 878void 879device_enable(device_t dev) 880{ 881 dev->flags |= DF_ENABLED; 882} 883 884void 885device_disable(device_t dev) 886{ 887 dev->flags &= ~DF_ENABLED; 888} 889 890void 891device_busy(device_t dev) 892{ 893 if (dev->state < DS_ATTACHED) 894 panic("device_busy: called for unattached device"); 895 if (dev->busy == 0 && dev->parent) 896 device_busy(dev->parent); 897 dev->busy++; 898 dev->state = DS_BUSY; 899} 900 901void 902device_unbusy(device_t dev) 903{ 904 if (dev->state != DS_BUSY) 905 panic("device_unbusy: called for non-busy device"); 906 dev->busy--; 907 if (dev->busy == 0) { 908 if (dev->parent) 909 device_unbusy(dev->parent); 910 dev->state = DS_ATTACHED; 911 } 912} 913 914void 915device_quiet(device_t dev) 916{ 917 dev->flags |= DF_QUIET; 918} 919 920void 921device_verbose(device_t dev) 922{ 923 dev->flags &= ~DF_QUIET; 924} 925 926int 927device_is_quiet(device_t dev) 928{ 929 return (dev->flags & DF_QUIET) != 0; 930} 931 932int 933device_is_enabled(device_t dev) 934{ 935 return (dev->flags & DF_ENABLED) != 0; 936} 937 938int 939device_is_alive(device_t dev) 940{ 941 return dev->state >= DS_ALIVE; 942} 943 944int 945device_set_devclass(device_t dev, const char *classname) 946{ 947 devclass_t dc; 948 949 if (!classname) { 950 if (dev->devclass) 951 devclass_delete_device(dev->devclass, dev); 952 return 0; 953 } 954 955 if (dev->devclass) { 956 printf("device_set_devclass: device class already set\n"); 957 return EINVAL; 958 } 959 960 dc = devclass_find_internal(classname, TRUE); 961 if (!dc) 962 return ENOMEM; 963 964 return devclass_add_device(dc, dev); 965} 966 967int 968device_set_driver(device_t dev, driver_t *driver) 969{ 970 if (dev->state >= DS_ATTACHED) 971 return EBUSY; 972 973 if (dev->driver == driver) 974 return 0; 975 976 if (dev->softc) { 977 free(dev->softc, M_BUS); 978 dev->softc = NULL; 979 } 980 kobj_delete((kobj_t) dev, 0); 981 dev->driver = driver; 982 if (driver) { 983 kobj_init((kobj_t) dev, (kobj_class_t) driver); 984 dev->softc = malloc(driver->size, M_BUS, M_NOWAIT); 985 if (!dev->softc) { 986 kobj_init((kobj_t) dev, &null_class); 987 dev->driver = NULL; 988 return ENOMEM; 989 } 990 bzero(dev->softc, driver->size); 991 } else 992 kobj_init((kobj_t) dev, &null_class); 993 return 0; 994} 995 996int 997device_probe_and_attach(device_t dev) 998{ 999 device_t bus = dev->parent; 1000 int error = 0; 1001 1002 if (dev->state >= DS_ALIVE) 1003 return 0; 1004 1005 if (dev->flags & DF_ENABLED) { 1006 error = device_probe_child(bus, dev); 1007 if (!error) { 1008 if (!device_is_quiet(dev)) 1009 device_print_child(bus, dev); 1010 error = DEVICE_ATTACH(dev); 1011 if (!error) 1012 dev->state = DS_ATTACHED; 1013 else { 1014 printf("device_probe_and_attach: %s%d attach returned %d\n", 1015 dev->driver->name, dev->unit, error); 1016 device_set_driver(dev, NULL); 1017 dev->state = DS_NOTPRESENT; 1018 } 1019 } else { 1020 if (!(dev->flags & DF_DONENOMATCH)) { 1021 BUS_PROBE_NOMATCH(bus, dev); 1022 dev->flags |= DF_DONENOMATCH; 1023 } 1024 } 1025 } else { 1026 if (bootverbose) { 1027 device_print_prettyname(dev); 1028 printf("not probed (disabled)\n"); 1029 } 1030 } 1031 1032 return error; 1033} 1034 1035int 1036device_detach(device_t dev) 1037{ 1038 int error; 1039 1040 PDEBUG(("%s", DEVICENAME(dev))); 1041 if (dev->state == DS_BUSY) 1042 return EBUSY; 1043 if (dev->state != DS_ATTACHED) 1044 return 0; 1045 1046 if ((error = DEVICE_DETACH(dev)) != 0) 1047 return error; 1048 device_printf(dev, "detached\n"); 1049 if (dev->parent) 1050 BUS_CHILD_DETACHED(dev->parent, dev); 1051 1052 if (!(dev->flags & DF_FIXEDCLASS)) 1053 devclass_delete_device(dev->devclass, dev); 1054 1055 dev->state = DS_NOTPRESENT; 1056 device_set_driver(dev, NULL); 1057 1058 return 0; 1059} 1060 1061int 1062device_shutdown(device_t dev) 1063{ 1064 if (dev->state < DS_ATTACHED) 1065 return 0; 1066 return DEVICE_SHUTDOWN(dev); 1067} 1068 1069int 1070device_set_unit(device_t dev, int unit) 1071{ 1072 devclass_t dc; 1073 int err; 1074 1075 dc = device_get_devclass(dev); 1076 if (unit < dc->maxunit && dc->devices[unit]) 1077 return EBUSY; 1078 err = devclass_delete_device(dc, dev); 1079 if (err) 1080 return err; 1081 dev->unit = unit; 1082 err = devclass_add_device(dc, dev); 1083 if (err) 1084 return err; 1085 return 0; 1086} 1087 1088#ifdef DEVICE_SYSCTLS 1089 1090/* 1091 * Sysctl nodes for devices. 1092 */ 1093 1094SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1095 1096static int 1097sysctl_handle_children SYSCTL_HANDLER_ARGS 1098{ 1099 device_t dev = arg1; 1100 device_t child; 1101 int first = 1, error = 0; 1102 1103 for (child = TAILQ_FIRST(&dev->children); child; 1104 child = TAILQ_NEXT(child, link)) { 1105 if (child->nameunit) { 1106 if (!first) { 1107 error = SYSCTL_OUT(req, ",", 1); 1108 if (error) return error; 1109 } else { 1110 first = 0; 1111 } 1112 error = SYSCTL_OUT(req, child->nameunit, strlen(child->nameunit)); 1113 if (error) return error; 1114 } 1115 } 1116 1117 error = SYSCTL_OUT(req, "", 1); 1118 1119 return error; 1120} 1121 1122static int 1123sysctl_handle_state SYSCTL_HANDLER_ARGS 1124{ 1125 device_t dev = arg1; 1126 1127 switch (dev->state) { 1128 case DS_NOTPRESENT: 1129 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1130 case DS_ALIVE: 1131 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1132 case DS_ATTACHED: 1133 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1134 case DS_BUSY: 1135 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1136 } 1137 1138 return 0; 1139} 1140 1141static void 1142device_register_oids(device_t dev) 1143{ 1144 struct sysctl_oid* oid; 1145 1146 oid = &dev->oid[0]; 1147 bzero(oid, sizeof(*oid)); 1148 oid->oid_parent = &sysctl__hw_devices_children; 1149 oid->oid_number = OID_AUTO; 1150 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1151 oid->oid_arg1 = &dev->oidlist[0]; 1152 oid->oid_arg2 = 0; 1153 oid->oid_name = dev->nameunit; 1154 oid->oid_handler = 0; 1155 oid->oid_fmt = "N"; 1156 SLIST_INIT(&dev->oidlist[0]); 1157 sysctl_register_oid(oid); 1158 1159 oid = &dev->oid[1]; 1160 bzero(oid, sizeof(*oid)); 1161 oid->oid_parent = &dev->oidlist[0]; 1162 oid->oid_number = OID_AUTO; 1163 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1164 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1165 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1166 oid->oid_name = "desc"; 1167 oid->oid_handler = sysctl_handle_string; 1168 oid->oid_fmt = "A"; 1169 sysctl_register_oid(oid); 1170 1171 oid = &dev->oid[2]; 1172 bzero(oid, sizeof(*oid)); 1173 oid->oid_parent = &dev->oidlist[0]; 1174 oid->oid_number = OID_AUTO; 1175 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1176 oid->oid_arg1 = dev; 1177 oid->oid_arg2 = 0; 1178 oid->oid_name = "children"; 1179 oid->oid_handler = sysctl_handle_children; 1180 oid->oid_fmt = "A"; 1181 sysctl_register_oid(oid); 1182 1183 oid = &dev->oid[3]; 1184 bzero(oid, sizeof(*oid)); 1185 oid->oid_parent = &dev->oidlist[0]; 1186 oid->oid_number = OID_AUTO; 1187 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1188 oid->oid_arg1 = dev; 1189 oid->oid_arg2 = 0; 1190 oid->oid_name = "state"; 1191 oid->oid_handler = sysctl_handle_state; 1192 oid->oid_fmt = "A"; 1193 sysctl_register_oid(oid); 1194} 1195 1196static void 1197device_unregister_oids(device_t dev) 1198{ 1199 sysctl_unregister_oid(&dev->oid[0]); 1200 sysctl_unregister_oid(&dev->oid[1]); 1201 sysctl_unregister_oid(&dev->oid[2]); 1202} 1203 1204#endif 1205 1206/*======================================*/ 1207/* 1208 * Access functions for device resources. 1209 */ 1210 1211/* Supplied by config(8) in ioconf.c */ 1212extern struct config_device config_devtab[]; 1213extern int devtab_count; 1214 1215/* Runtime version */ 1216struct config_device *devtab = config_devtab; 1217 1218static int 1219resource_new_name(const char *name, int unit) 1220{ 1221 struct config_device *new; 1222 1223 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1224 if (new == NULL) 1225 return -1; 1226 if (devtab && devtab_count > 0) 1227 bcopy(devtab, new, devtab_count * sizeof(*new)); 1228 bzero(&new[devtab_count], sizeof(*new)); 1229 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_NOWAIT); 1230 if (new[devtab_count].name == NULL) { 1231 free(new, M_TEMP); 1232 return -1; 1233 } 1234 strcpy(new[devtab_count].name, name); 1235 new[devtab_count].unit = unit; 1236 new[devtab_count].resource_count = 0; 1237 new[devtab_count].resources = NULL; 1238 devtab = new; 1239 return devtab_count++; 1240} 1241 1242static int 1243resource_new_resname(int j, const char *resname, resource_type type) 1244{ 1245 struct config_resource *new; 1246 int i; 1247 1248 i = devtab[j].resource_count; 1249 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1250 if (new == NULL) 1251 return -1; 1252 if (devtab[j].resources && i > 0) 1253 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1254 bzero(&new[i], sizeof(*new)); 1255 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_NOWAIT); 1256 if (new[i].name == NULL) { 1257 free(new, M_TEMP); 1258 return -1; 1259 } 1260 strcpy(new[i].name, resname); 1261 new[i].type = type; 1262 if (devtab[j].resources) 1263 free(devtab[j].resources, M_TEMP); 1264 devtab[j].resources = new; 1265 devtab[j].resource_count = i + 1; 1266 return i; 1267} 1268 1269static int 1270resource_match_string(int i, const char *resname, const char *value) 1271{ 1272 int j; 1273 struct config_resource *res; 1274 1275 for (j = 0, res = devtab[i].resources; 1276 j < devtab[i].resource_count; j++, res++) 1277 if (!strcmp(res->name, resname) 1278 && res->type == RES_STRING 1279 && !strcmp(res->u.stringval, value)) 1280 return j; 1281 return -1; 1282} 1283 1284static int 1285resource_find(const char *name, int unit, const char *resname, 1286 struct config_resource **result) 1287{ 1288 int i, j; 1289 struct config_resource *res; 1290 1291 /* 1292 * First check specific instances, then generic. 1293 */ 1294 for (i = 0; i < devtab_count; i++) { 1295 if (devtab[i].unit < 0) 1296 continue; 1297 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1298 res = devtab[i].resources; 1299 for (j = 0; j < devtab[i].resource_count; j++, res++) 1300 if (!strcmp(res->name, resname)) { 1301 *result = res; 1302 return 0; 1303 } 1304 } 1305 } 1306 for (i = 0; i < devtab_count; i++) { 1307 if (devtab[i].unit >= 0) 1308 continue; 1309 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1310 /* XXX if so, then the generic match does nothing */ 1311 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1312 res = devtab[i].resources; 1313 for (j = 0; j < devtab[i].resource_count; j++, res++) 1314 if (!strcmp(res->name, resname)) { 1315 *result = res; 1316 return 0; 1317 } 1318 } 1319 } 1320 return ENOENT; 1321} 1322 1323int 1324resource_int_value(const char *name, int unit, const char *resname, int *result) 1325{ 1326 int error; 1327 struct config_resource *res; 1328 1329 if ((error = resource_find(name, unit, resname, &res)) != 0) 1330 return error; 1331 if (res->type != RES_INT) 1332 return EFTYPE; 1333 *result = res->u.intval; 1334 return 0; 1335} 1336 1337int 1338resource_long_value(const char *name, int unit, const char *resname, 1339 long *result) 1340{ 1341 int error; 1342 struct config_resource *res; 1343 1344 if ((error = resource_find(name, unit, resname, &res)) != 0) 1345 return error; 1346 if (res->type != RES_LONG) 1347 return EFTYPE; 1348 *result = res->u.longval; 1349 return 0; 1350} 1351 1352int 1353resource_string_value(const char *name, int unit, const char *resname, 1354 char **result) 1355{ 1356 int error; 1357 struct config_resource *res; 1358 1359 if ((error = resource_find(name, unit, resname, &res)) != 0) 1360 return error; 1361 if (res->type != RES_STRING) 1362 return EFTYPE; 1363 *result = res->u.stringval; 1364 return 0; 1365} 1366 1367int 1368resource_query_string(int i, const char *resname, const char *value) 1369{ 1370 if (i < 0) 1371 i = 0; 1372 else 1373 i = i + 1; 1374 for (; i < devtab_count; i++) 1375 if (resource_match_string(i, resname, value) >= 0) 1376 return i; 1377 return -1; 1378} 1379 1380int 1381resource_locate(int i, const char *resname) 1382{ 1383 if (i < 0) 1384 i = 0; 1385 else 1386 i = i + 1; 1387 for (; i < devtab_count; i++) 1388 if (!strcmp(devtab[i].name, resname)) 1389 return i; 1390 return -1; 1391} 1392 1393int 1394resource_count(void) 1395{ 1396 return devtab_count; 1397} 1398 1399char * 1400resource_query_name(int i) 1401{ 1402 return devtab[i].name; 1403} 1404 1405int 1406resource_query_unit(int i) 1407{ 1408 return devtab[i].unit; 1409} 1410 1411static int 1412resource_create(const char *name, int unit, const char *resname, 1413 resource_type type, struct config_resource **result) 1414{ 1415 int i, j; 1416 struct config_resource *res = NULL; 1417 1418 for (i = 0; i < devtab_count; i++) { 1419 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1420 res = devtab[i].resources; 1421 break; 1422 } 1423 } 1424 if (res == NULL) { 1425 i = resource_new_name(name, unit); 1426 if (i < 0) 1427 return ENOMEM; 1428 res = devtab[i].resources; 1429 } 1430 for (j = 0; j < devtab[i].resource_count; j++, res++) { 1431 if (!strcmp(res->name, resname)) { 1432 *result = res; 1433 return 0; 1434 } 1435 } 1436 j = resource_new_resname(i, resname, type); 1437 if (j < 0) 1438 return ENOMEM; 1439 res = &devtab[i].resources[j]; 1440 *result = res; 1441 return 0; 1442} 1443 1444int 1445resource_set_int(const char *name, int unit, const char *resname, int value) 1446{ 1447 int error; 1448 struct config_resource *res; 1449 1450 error = resource_create(name, unit, resname, RES_INT, &res); 1451 if (error) 1452 return error; 1453 if (res->type != RES_INT) 1454 return EFTYPE; 1455 res->u.intval = value; 1456 return 0; 1457} 1458 1459int 1460resource_set_long(const char *name, int unit, const char *resname, long value) 1461{ 1462 int error; 1463 struct config_resource *res; 1464 1465 error = resource_create(name, unit, resname, RES_LONG, &res); 1466 if (error) 1467 return error; 1468 if (res->type != RES_LONG) 1469 return EFTYPE; 1470 res->u.longval = value; 1471 return 0; 1472} 1473 1474int 1475resource_set_string(const char *name, int unit, const char *resname, 1476 const char *value) 1477{ 1478 int error; 1479 struct config_resource *res; 1480 1481 error = resource_create(name, unit, resname, RES_STRING, &res); 1482 if (error) 1483 return error; 1484 if (res->type != RES_STRING) 1485 return EFTYPE; 1486 if (res->u.stringval) 1487 free(res->u.stringval, M_TEMP); 1488 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_NOWAIT); 1489 if (res->u.stringval == NULL) 1490 return ENOMEM; 1491 strcpy(res->u.stringval, value); 1492 return 0; 1493} 1494 1495 1496static void 1497resource_cfgload(void *dummy __unused) 1498{ 1499 struct config_resource *res, *cfgres; 1500 int i, j; 1501 int error; 1502 char *name, *resname; 1503 int unit; 1504 resource_type type; 1505 char *stringval; 1506 int config_devtab_count; 1507 1508 config_devtab_count = devtab_count; 1509 devtab = NULL; 1510 devtab_count = 0; 1511 1512 for (i = 0; i < config_devtab_count; i++) { 1513 name = config_devtab[i].name; 1514 unit = config_devtab[i].unit; 1515 1516 for (j = 0; j < config_devtab[i].resource_count; j++) { 1517 cfgres = config_devtab[i].resources; 1518 resname = cfgres[j].name; 1519 type = cfgres[j].type; 1520 error = resource_create(name, unit, resname, type, 1521 &res); 1522 if (error) { 1523 printf("create resource %s%d: error %d\n", 1524 name, unit, error); 1525 continue; 1526 } 1527 if (res->type != type) { 1528 printf("type mismatch %s%d: %d != %d\n", 1529 name, unit, res->type, type); 1530 continue; 1531 } 1532 switch (type) { 1533 case RES_INT: 1534 res->u.intval = cfgres[j].u.intval; 1535 break; 1536 case RES_LONG: 1537 res->u.longval = cfgres[j].u.longval; 1538 break; 1539 case RES_STRING: 1540 if (res->u.stringval) 1541 free(res->u.stringval, M_TEMP); 1542 stringval = cfgres[j].u.stringval; 1543 res->u.stringval = malloc(strlen(stringval) + 1, 1544 M_TEMP, M_NOWAIT); 1545 if (res->u.stringval == NULL) 1546 break; 1547 strcpy(res->u.stringval, stringval); 1548 break; 1549 default: 1550 panic("unknown resource type %d\n", type); 1551 } 1552 } 1553 } 1554} 1555SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1556 1557 1558/*======================================*/ 1559/* 1560 * Some useful method implementations to make life easier for bus drivers. 1561 */ 1562 1563void 1564resource_list_init(struct resource_list *rl) 1565{ 1566 SLIST_INIT(rl); 1567} 1568 1569void 1570resource_list_free(struct resource_list *rl) 1571{ 1572 struct resource_list_entry *rle; 1573 1574 while ((rle = SLIST_FIRST(rl)) != NULL) { 1575 if (rle->res) 1576 panic("resource_list_free: resource entry is busy"); 1577 SLIST_REMOVE_HEAD(rl, link); 1578 free(rle, M_BUS); 1579 } 1580} 1581 1582void 1583resource_list_add(struct resource_list *rl, 1584 int type, int rid, 1585 u_long start, u_long end, u_long count) 1586{ 1587 struct resource_list_entry *rle; 1588 1589 rle = resource_list_find(rl, type, rid); 1590 if (!rle) { 1591 rle = malloc(sizeof(struct resource_list_entry), M_BUS, M_NOWAIT); 1592 if (!rle) 1593 panic("resource_list_add: can't record entry"); 1594 SLIST_INSERT_HEAD(rl, rle, link); 1595 rle->type = type; 1596 rle->rid = rid; 1597 rle->res = NULL; 1598 } 1599 1600 if (rle->res) 1601 panic("resource_list_add: resource entry is busy"); 1602 1603 rle->start = start; 1604 rle->end = end; 1605 rle->count = count; 1606} 1607 1608struct resource_list_entry* 1609resource_list_find(struct resource_list *rl, 1610 int type, int rid) 1611{ 1612 struct resource_list_entry *rle; 1613 1614 SLIST_FOREACH(rle, rl, link) 1615 if (rle->type == type && rle->rid == rid) 1616 return rle; 1617 return NULL; 1618} 1619 1620void 1621resource_list_delete(struct resource_list *rl, 1622 int type, int rid) 1623{ 1624 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1625 1626 if (rle) { 1627 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1628 free(rle, M_BUS); 1629 } 1630} 1631 1632struct resource * 1633resource_list_alloc(struct resource_list *rl, 1634 device_t bus, device_t child, 1635 int type, int *rid, 1636 u_long start, u_long end, 1637 u_long count, u_int flags) 1638{ 1639 struct resource_list_entry *rle = 0; 1640 int passthrough = (device_get_parent(child) != bus); 1641 int isdefault = (start == 0UL && end == ~0UL); 1642 1643 if (passthrough) { 1644 return BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1645 type, rid, 1646 start, end, count, flags); 1647 } 1648 1649 rle = resource_list_find(rl, type, *rid); 1650 1651 if (!rle) 1652 return 0; /* no resource of that type/rid */ 1653 if (rle->res) 1654 panic("resource_list_alloc: resource entry is busy"); 1655 1656 if (isdefault) { 1657 start = rle->start; 1658 count = max(count, rle->count); 1659 end = max(rle->end, start + count - 1); 1660 } 1661 1662 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1663 type, rid, start, end, count, flags); 1664 1665 /* 1666 * Record the new range. 1667 */ 1668 if (rle->res) { 1669 rle->start = rman_get_start(rle->res); 1670 rle->end = rman_get_end(rle->res); 1671 rle->count = count; 1672 } 1673 1674 return rle->res; 1675} 1676 1677int 1678resource_list_release(struct resource_list *rl, 1679 device_t bus, device_t child, 1680 int type, int rid, struct resource *res) 1681{ 1682 struct resource_list_entry *rle = 0; 1683 int passthrough = (device_get_parent(child) != bus); 1684 int error; 1685 1686 if (passthrough) { 1687 return BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1688 type, rid, res); 1689 } 1690 1691 rle = resource_list_find(rl, type, rid); 1692 1693 if (!rle) 1694 panic("resource_list_release: can't find resource"); 1695 if (!rle->res) 1696 panic("resource_list_release: resource entry is not busy"); 1697 1698 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1699 type, rid, res); 1700 if (error) 1701 return error; 1702 1703 rle->res = NULL; 1704 return 0; 1705} 1706 1707/* 1708 * Call DEVICE_IDENTIFY for each driver. 1709 */ 1710int 1711bus_generic_probe(device_t dev) 1712{ 1713 devclass_t dc = dev->devclass; 1714 driverlink_t dl; 1715 1716 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) 1717 DEVICE_IDENTIFY(dl->driver, dev); 1718 1719 return 0; 1720} 1721 1722int 1723bus_generic_attach(device_t dev) 1724{ 1725 device_t child; 1726 1727 for (child = TAILQ_FIRST(&dev->children); 1728 child; child = TAILQ_NEXT(child, link)) 1729 device_probe_and_attach(child); 1730 1731 return 0; 1732} 1733 1734int 1735bus_generic_detach(device_t dev) 1736{ 1737 device_t child; 1738 int error; 1739 1740 if (dev->state != DS_ATTACHED) 1741 return EBUSY; 1742 1743 for (child = TAILQ_FIRST(&dev->children); 1744 child; child = TAILQ_NEXT(child, link)) 1745 if ((error = device_detach(child)) != 0) 1746 return error; 1747 1748 return 0; 1749} 1750 1751int 1752bus_generic_shutdown(device_t dev) 1753{ 1754 device_t child; 1755 1756 for (child = TAILQ_FIRST(&dev->children); 1757 child; child = TAILQ_NEXT(child, link)) 1758 device_shutdown(child); 1759 1760 return 0; 1761} 1762 1763int 1764bus_generic_suspend(device_t dev) 1765{ 1766 int error; 1767 device_t child, child2; 1768 1769 for (child = TAILQ_FIRST(&dev->children); 1770 child; child = TAILQ_NEXT(child, link)) { 1771 error = DEVICE_SUSPEND(child); 1772 if (error) { 1773 for (child2 = TAILQ_FIRST(&dev->children); 1774 child2 && child2 != child; 1775 child2 = TAILQ_NEXT(child2, link)) 1776 DEVICE_RESUME(child2); 1777 return (error); 1778 } 1779 } 1780 return 0; 1781} 1782 1783int 1784bus_generic_resume(device_t dev) 1785{ 1786 device_t child; 1787 1788 for (child = TAILQ_FIRST(&dev->children); 1789 child; child = TAILQ_NEXT(child, link)) { 1790 DEVICE_RESUME(child); 1791 /* if resume fails, there's nothing we can usefully do... */ 1792 } 1793 return 0; 1794} 1795 1796int 1797bus_print_child_header (device_t dev, device_t child) 1798{ 1799 int retval = 0; 1800 1801 if (device_get_desc(child)) { 1802 retval += device_printf(child, "<%s>", 1803 device_get_desc(child)); 1804 } else { 1805 retval += printf("%s", device_get_nameunit(child)); 1806 } 1807 1808 return (retval); 1809} 1810 1811int 1812bus_print_child_footer (device_t dev, device_t child) 1813{ 1814 return(printf(" on %s\n", device_get_nameunit(dev))); 1815} 1816 1817int 1818bus_generic_print_child(device_t dev, device_t child) 1819{ 1820 int retval = 0; 1821 1822 retval += bus_print_child_header(dev, child); 1823 retval += bus_print_child_footer(dev, child); 1824 1825 return (retval); 1826} 1827 1828int 1829bus_generic_read_ivar(device_t dev, device_t child, int index, 1830 uintptr_t * result) 1831{ 1832 return ENOENT; 1833} 1834 1835int 1836bus_generic_write_ivar(device_t dev, device_t child, int index, 1837 uintptr_t value) 1838{ 1839 return ENOENT; 1840} 1841 1842void 1843bus_generic_driver_added(device_t dev, driver_t *driver) 1844{ 1845 device_t child; 1846 1847 DEVICE_IDENTIFY(driver, dev); 1848 for (child = TAILQ_FIRST(&dev->children); 1849 child; child = TAILQ_NEXT(child, link)) 1850 if (child->state == DS_NOTPRESENT) 1851 device_probe_and_attach(child); 1852} 1853 1854int 1855bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1856 int flags, driver_intr_t *intr, void *arg, 1857 void **cookiep) 1858{ 1859 /* Propagate up the bus hierarchy until someone handles it. */ 1860 if (dev->parent) 1861 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1862 intr, arg, cookiep)); 1863 else 1864 return (EINVAL); 1865} 1866 1867int 1868bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1869 void *cookie) 1870{ 1871 /* Propagate up the bus hierarchy until someone handles it. */ 1872 if (dev->parent) 1873 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1874 else 1875 return (EINVAL); 1876} 1877 1878struct resource * 1879bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1880 u_long start, u_long end, u_long count, u_int flags) 1881{ 1882 /* Propagate up the bus hierarchy until someone handles it. */ 1883 if (dev->parent) 1884 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1885 start, end, count, flags)); 1886 else 1887 return (NULL); 1888} 1889 1890int 1891bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1892 struct resource *r) 1893{ 1894 /* Propagate up the bus hierarchy until someone handles it. */ 1895 if (dev->parent) 1896 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1897 r)); 1898 else 1899 return (EINVAL); 1900} 1901 1902int 1903bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1904 struct resource *r) 1905{ 1906 /* Propagate up the bus hierarchy until someone handles it. */ 1907 if (dev->parent) 1908 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1909 r)); 1910 else 1911 return (EINVAL); 1912} 1913 1914int 1915bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1916 int rid, struct resource *r) 1917{ 1918 /* Propagate up the bus hierarchy until someone handles it. */ 1919 if (dev->parent) 1920 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1921 r)); 1922 else 1923 return (EINVAL); 1924} 1925 1926/* 1927 * Some convenience functions to make it easier for drivers to use the 1928 * resource-management functions. All these really do is hide the 1929 * indirection through the parent's method table, making for slightly 1930 * less-wordy code. In the future, it might make sense for this code 1931 * to maintain some sort of a list of resources allocated by each device. 1932 */ 1933struct resource * 1934bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 1935 u_long count, u_int flags) 1936{ 1937 if (dev->parent == 0) 1938 return (0); 1939 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 1940 count, flags)); 1941} 1942 1943int 1944bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 1945{ 1946 if (dev->parent == 0) 1947 return (EINVAL); 1948 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 1949} 1950 1951int 1952bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 1953{ 1954 if (dev->parent == 0) 1955 return (EINVAL); 1956 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 1957} 1958 1959int 1960bus_release_resource(device_t dev, int type, int rid, struct resource *r) 1961{ 1962 if (dev->parent == 0) 1963 return (EINVAL); 1964 return (BUS_RELEASE_RESOURCE(dev->parent, dev, 1965 type, rid, r)); 1966} 1967 1968int 1969bus_setup_intr(device_t dev, struct resource *r, int flags, 1970 driver_intr_t handler, void *arg, void **cookiep) 1971{ 1972 if (dev->parent == 0) 1973 return (EINVAL); 1974 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 1975 handler, arg, cookiep)); 1976} 1977 1978int 1979bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 1980{ 1981 if (dev->parent == 0) 1982 return (EINVAL); 1983 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 1984} 1985 1986int 1987bus_set_resource(device_t dev, int type, int rid, 1988 u_long start, u_long count) 1989{ 1990 return BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 1991 start, count); 1992} 1993 1994int 1995bus_get_resource(device_t dev, int type, int rid, 1996 u_long *startp, u_long *countp) 1997{ 1998 return BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 1999 startp, countp); 2000} 2001 2002u_long 2003bus_get_resource_start(device_t dev, int type, int rid) 2004{ 2005 u_long start, count; 2006 int error; 2007 2008 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2009 &start, &count); 2010 if (error) 2011 return 0; 2012 return start; 2013} 2014 2015u_long 2016bus_get_resource_count(device_t dev, int type, int rid) 2017{ 2018 u_long start, count; 2019 int error; 2020 2021 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2022 &start, &count); 2023 if (error) 2024 return 0; 2025 return count; 2026} 2027 2028void 2029bus_delete_resource(device_t dev, int type, int rid) 2030{ 2031 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2032} 2033 2034static int 2035root_print_child(device_t dev, device_t child) 2036{ 2037 return (0); 2038} 2039 2040static int 2041root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2042 void **cookiep) 2043{ 2044 /* 2045 * If an interrupt mapping gets to here something bad has happened. 2046 */ 2047 panic("root_setup_intr"); 2048} 2049 2050static kobj_method_t root_methods[] = { 2051 /* Device interface */ 2052 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2053 KOBJMETHOD(device_suspend, bus_generic_suspend), 2054 KOBJMETHOD(device_resume, bus_generic_resume), 2055 2056 /* Bus interface */ 2057 KOBJMETHOD(bus_print_child, root_print_child), 2058 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2059 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2060 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2061 2062 { 0, 0 } 2063}; 2064 2065static driver_t root_driver = { 2066 "root", 2067 root_methods, 2068 1, /* no softc */ 2069}; 2070 2071device_t root_bus; 2072devclass_t root_devclass; 2073 2074static int 2075root_bus_module_handler(module_t mod, int what, void* arg) 2076{ 2077 switch (what) { 2078 case MOD_LOAD: 2079 kobj_class_compile((kobj_class_t) &root_driver); 2080 root_bus = make_device(NULL, "root", 0); 2081 root_bus->desc = "System root bus"; 2082 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2083 root_bus->driver = &root_driver; 2084 root_bus->state = DS_ATTACHED; 2085 root_devclass = devclass_find_internal("root", FALSE); 2086 return 0; 2087 2088 case MOD_SHUTDOWN: 2089 device_shutdown(root_bus); 2090 return 0; 2091 } 2092 2093 return 0; 2094} 2095 2096static moduledata_t root_bus_mod = { 2097 "rootbus", 2098 root_bus_module_handler, 2099 0 2100}; 2101DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2102 2103void 2104root_bus_configure(void) 2105{ 2106 device_t dev; 2107 2108 PDEBUG((".")); 2109 2110 for (dev = TAILQ_FIRST(&root_bus->children); dev; 2111 dev = TAILQ_NEXT(dev, link)) { 2112 device_probe_and_attach(dev); 2113 } 2114} 2115 2116int 2117driver_module_handler(module_t mod, int what, void *arg) 2118{ 2119 int error, i; 2120 struct driver_module_data *dmd; 2121 devclass_t bus_devclass; 2122 2123 dmd = (struct driver_module_data *)arg; 2124 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2125 error = 0; 2126 2127 switch (what) { 2128 case MOD_LOAD: 2129 if (dmd->dmd_chainevh) 2130 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2131 2132 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2133 PDEBUG(("Loading module: driver %s on bus %s", 2134 DRIVERNAME(dmd->dmd_drivers[i]), 2135 dmd->dmd_busname)); 2136 error = devclass_add_driver(bus_devclass, 2137 dmd->dmd_drivers[i]); 2138 } 2139 if (error) 2140 break; 2141 2142 /* 2143 * The drivers loaded in this way are assumed to all 2144 * implement the same devclass. 2145 */ 2146 *dmd->dmd_devclass = 2147 devclass_find_internal(dmd->dmd_drivers[0]->name, 2148 TRUE); 2149 break; 2150 2151 case MOD_UNLOAD: 2152 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2153 PDEBUG(("Unloading module: driver %s from bus %s", 2154 DRIVERNAME(dmd->dmd_drivers[i]), 2155 dmd->dmd_busname)); 2156 error = devclass_delete_driver(bus_devclass, 2157 dmd->dmd_drivers[i]); 2158 } 2159 2160 if (!error && dmd->dmd_chainevh) 2161 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2162 break; 2163 } 2164 2165 return (error); 2166} 2167 2168#ifdef BUS_DEBUG 2169 2170/* the _short versions avoid iteration by not calling anything that prints 2171 * more than oneliners. I love oneliners. 2172 */ 2173 2174static void 2175print_method_list(device_method_t *m, int indent) 2176{ 2177 int i; 2178 2179 if (!m) 2180 return; 2181 2182 for (i = 0; m->desc; i++, m++) 2183 indentprintf(("method %d: %s, offset=%d\n", 2184 i, m->desc->name, m->desc->offset)); 2185} 2186 2187static void 2188print_device_short(device_t dev, int indent) 2189{ 2190 if (!dev) 2191 return; 2192 2193 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2194 dev->unit, dev->desc, 2195 (dev->parent? "":"no "), 2196 (TAILQ_EMPTY(&dev->children)? "no ":""), 2197 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2198 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2199 (dev->flags&DF_WILDCARD? "wildcard,":""), 2200 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2201 (dev->ivars? "":"no "), 2202 (dev->softc? "":"no "), 2203 dev->busy)); 2204} 2205 2206static void 2207print_device(device_t dev, int indent) 2208{ 2209 if (!dev) 2210 return; 2211 2212 print_device_short(dev, indent); 2213 2214 indentprintf(("Parent:\n")); 2215 print_device_short(dev->parent, indent+1); 2216 indentprintf(("Driver:\n")); 2217 print_driver_short(dev->driver, indent+1); 2218 indentprintf(("Devclass:\n")); 2219 print_devclass_short(dev->devclass, indent+1); 2220} 2221 2222void 2223print_device_tree_short(device_t dev, int indent) 2224/* print the device and all its children (indented) */ 2225{ 2226 device_t child; 2227 2228 if (!dev) 2229 return; 2230 2231 print_device_short(dev, indent); 2232 2233 for (child = TAILQ_FIRST(&dev->children); child; 2234 child = TAILQ_NEXT(child, link)) 2235 print_device_tree_short(child, indent+1); 2236} 2237 2238void 2239print_device_tree(device_t dev, int indent) 2240/* print the device and all its children (indented) */ 2241{ 2242 device_t child; 2243 2244 if (!dev) 2245 return; 2246 2247 print_device(dev, indent); 2248 2249 for (child = TAILQ_FIRST(&dev->children); child; 2250 child = TAILQ_NEXT(child, link)) 2251 print_device_tree(child, indent+1); 2252} 2253 2254static void 2255print_driver_short(driver_t *driver, int indent) 2256{ 2257 if (!driver) 2258 return; 2259 2260 indentprintf(("driver %s: softc size = %d\n", 2261 driver->name, driver->softc)); 2262} 2263 2264static void 2265print_driver(driver_t *driver, int indent) 2266{ 2267 if (!driver) 2268 return; 2269 2270 print_driver_short(driver, indent); 2271 indentprintf(("Methods:\n")); 2272 print_method_list(driver->methods, indent+1); 2273} 2274 2275 2276static void 2277print_driver_list(driver_list_t drivers, int indent) 2278{ 2279 driverlink_t driver; 2280 2281 for (driver = TAILQ_FIRST(&drivers); driver; 2282 driver = TAILQ_NEXT(driver, link)) 2283 print_driver(driver->driver, indent); 2284} 2285 2286static void 2287print_devclass_short(devclass_t dc, int indent) 2288{ 2289 if ( !dc ) 2290 return; 2291 2292 indentprintf(("devclass %s: max units = %d\n", 2293 dc->name, dc->maxunit)); 2294} 2295 2296static void 2297print_devclass(devclass_t dc, int indent) 2298{ 2299 int i; 2300 2301 if ( !dc ) 2302 return; 2303 2304 print_devclass_short(dc, indent); 2305 indentprintf(("Drivers:\n")); 2306 print_driver_list(dc->drivers, indent+1); 2307 2308 indentprintf(("Devices:\n")); 2309 for (i = 0; i < dc->maxunit; i++) 2310 if (dc->devices[i]) 2311 print_device(dc->devices[i], indent+1); 2312} 2313 2314void 2315print_devclass_list_short(void) 2316{ 2317 devclass_t dc; 2318 2319 printf("Short listing of devclasses, drivers & devices:\n"); 2320 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2321 print_devclass_short(dc, 0); 2322} 2323 2324void 2325print_devclass_list(void) 2326{ 2327 devclass_t dc; 2328 2329 printf("Full listing of devclasses, drivers & devices:\n"); 2330 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2331 print_devclass(dc, 0); 2332} 2333 2334#endif 2335