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 * $FreeBSD$ 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 46 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 47 48 #ifdef BUS_DEBUG 49 #include <sys/sysctl.h> 50 51 static int bus_debug = 1; 52 SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0, "Debug bus code"); 53 54 #define PDEBUG(a) if (bus_debug) {printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n");} 55 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 56 #define DRIVERNAME(d) ((d)? d->name : "no driver") 57 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 58 59 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 60 * prevent syslog from deleting initial spaces 61 */ 62 #define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while(0) 63 64 static void print_device_short(device_t dev, int indent); 65 static void print_device(device_t dev, int indent); 66 void print_device_tree_short(device_t dev, int indent); 67 void print_device_tree(device_t dev, int indent); 68 static void print_driver_short(driver_t *driver, int indent); 69 static void print_driver(driver_t *driver, int indent); 70 static void print_driver_list(driver_list_t drivers, int indent); 71 static void print_devclass_short(devclass_t dc, int indent); 72 static void print_devclass(devclass_t dc, int indent); 73 void print_devclass_list_short(void); 74 void print_devclass_list(void); 75 76 #else 77 /* Make the compiler ignore the function calls */ 78 #define PDEBUG(a) /* nop */ 79 #define DEVICENAME(d) /* nop */ 80 #define DRIVERNAME(d) /* nop */ 81 #define DEVCLANAME(d) /* nop */ 82 83 #define print_device_short(d,i) /* nop */ 84 #define print_device(d,i) /* nop */ 85 #define print_device_tree_short(d,i) /* nop */ 86 #define print_device_tree(d,i) /* nop */ 87 #define print_driver_short(d,i) /* nop */ 88 #define print_driver(d,i) /* nop */ 89 #define print_driver_list(d,i) /* nop */ 90 #define print_devclass_short(d,i) /* nop */ 91 #define print_devclass(d,i) /* nop */ 92 #define print_devclass_list_short() /* nop */ 93 #define print_devclass_list() /* nop */ 94 #endif 95 96 #ifdef DEVICE_SYSCTLS 97 static void device_register_oids(device_t dev); 98 static void device_unregister_oids(device_t dev); 99 #endif 100 101 extern char static_hints[]; 102 static int hints_loaded; 103 104 kobj_method_t null_methods[] = { 105 { 0, 0 } 106 }; 107 108 DEFINE_CLASS(null, null_methods, 0); 109 110 /* 111 * Devclass implementation 112 */ 113 114 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 115 116 static devclass_t 117 devclass_find_internal(const char *classname, int create) 118 { 119 devclass_t dc; 120 121 PDEBUG(("looking for %s", classname)); 122 if (!classname) 123 return NULL; 124 125 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 126 if (!strcmp(dc->name, classname)) 127 return dc; 128 129 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 130 if (create) { 131 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 132 M_BUS, M_NOWAIT); 133 if (!dc) 134 return NULL; 135 bzero(dc, sizeof(struct devclass) + strlen(classname) + 1); 136 dc->name = (char*) (dc + 1); 137 strcpy(dc->name, classname); 138 dc->devices = NULL; 139 dc->maxunit = 0; 140 TAILQ_INIT(&dc->drivers); 141 TAILQ_INSERT_TAIL(&devclasses, dc, link); 142 } 143 144 return dc; 145 } 146 147 devclass_t 148 devclass_create(const char *classname) 149 { 150 return devclass_find_internal(classname, TRUE); 151 } 152 153 devclass_t 154 devclass_find(const char *classname) 155 { 156 return devclass_find_internal(classname, FALSE); 157 } 158 159 int 160 devclass_add_driver(devclass_t dc, driver_t *driver) 161 { 162 driverlink_t dl; 163 int i; 164 165 PDEBUG(("%s", DRIVERNAME(driver))); 166 167 dl = malloc(sizeof *dl, M_BUS, M_NOWAIT); 168 if (!dl) 169 return ENOMEM; 170 bzero(dl, sizeof *dl); 171 172 /* 173 * Compile the driver's methods. Also increase the reference count 174 * so that the class doesn't get freed when the last instance 175 * goes. This means we can safely use static methods and avoids a 176 * double-free in devclass_delete_driver. 177 */ 178 kobj_class_compile((kobj_class_t) driver); 179 180 /* 181 * Make sure the devclass which the driver is implementing exists. 182 */ 183 devclass_find_internal(driver->name, TRUE); 184 185 dl->driver = driver; 186 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 187 driver->refs++; 188 189 /* 190 * Call BUS_DRIVER_ADDED for any existing busses in this class. 191 */ 192 for (i = 0; i < dc->maxunit; i++) 193 if (dc->devices[i]) 194 BUS_DRIVER_ADDED(dc->devices[i], driver); 195 196 return 0; 197 } 198 199 int 200 devclass_delete_driver(devclass_t busclass, driver_t *driver) 201 { 202 devclass_t dc = devclass_find(driver->name); 203 driverlink_t dl; 204 device_t dev; 205 int i; 206 int error; 207 208 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 209 210 if (!dc) 211 return 0; 212 213 /* 214 * Find the link structure in the bus' list of drivers. 215 */ 216 for (dl = TAILQ_FIRST(&busclass->drivers); dl; 217 dl = TAILQ_NEXT(dl, link)) { 218 if (dl->driver == driver) 219 break; 220 } 221 222 if (!dl) { 223 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 224 return ENOENT; 225 } 226 227 /* 228 * Disassociate from any devices. We iterate through all the 229 * devices in the devclass of the driver and detach any which are 230 * using the driver and which have a parent in the devclass which 231 * we are deleting from. 232 * 233 * Note that since a driver can be in multiple devclasses, we 234 * should not detach devices which are not children of devices in 235 * the affected devclass. 236 */ 237 for (i = 0; i < dc->maxunit; i++) { 238 if (dc->devices[i]) { 239 dev = dc->devices[i]; 240 if (dev->driver == driver 241 && dev->parent && dev->parent->devclass == busclass) { 242 if ((error = device_detach(dev)) != 0) 243 return error; 244 device_set_driver(dev, NULL); 245 } 246 } 247 } 248 249 TAILQ_REMOVE(&busclass->drivers, dl, link); 250 free(dl, M_BUS); 251 252 driver->refs--; 253 if (driver->refs == 0) 254 kobj_class_free((kobj_class_t) driver); 255 256 return 0; 257 } 258 259 static driverlink_t 260 devclass_find_driver_internal(devclass_t dc, const char *classname) 261 { 262 driverlink_t dl; 263 264 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 265 266 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) { 267 if (!strcmp(dl->driver->name, classname)) 268 return dl; 269 } 270 271 PDEBUG(("not found")); 272 return NULL; 273 } 274 275 driver_t * 276 devclass_find_driver(devclass_t dc, const char *classname) 277 { 278 driverlink_t dl; 279 280 dl = devclass_find_driver_internal(dc, classname); 281 if (dl) 282 return dl->driver; 283 else 284 return NULL; 285 } 286 287 const char * 288 devclass_get_name(devclass_t dc) 289 { 290 return dc->name; 291 } 292 293 device_t 294 devclass_get_device(devclass_t dc, int unit) 295 { 296 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 297 return NULL; 298 return dc->devices[unit]; 299 } 300 301 void * 302 devclass_get_softc(devclass_t dc, int unit) 303 { 304 device_t dev; 305 306 dev = devclass_get_device(dc, unit); 307 if (!dev) 308 return (NULL); 309 310 return (device_get_softc(dev)); 311 } 312 313 int 314 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 315 { 316 int i; 317 int count; 318 device_t *list; 319 320 count = 0; 321 for (i = 0; i < dc->maxunit; i++) 322 if (dc->devices[i]) 323 count++; 324 325 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 326 if (!list) 327 return ENOMEM; 328 bzero(list, count * sizeof(device_t)); 329 330 count = 0; 331 for (i = 0; i < dc->maxunit; i++) 332 if (dc->devices[i]) { 333 list[count] = dc->devices[i]; 334 count++; 335 } 336 337 *devlistp = list; 338 *devcountp = count; 339 340 return 0; 341 } 342 343 int 344 devclass_get_maxunit(devclass_t dc) 345 { 346 return dc->maxunit; 347 } 348 349 static int 350 devclass_alloc_unit(devclass_t dc, int *unitp) 351 { 352 int unit = *unitp; 353 354 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 355 356 /* If we have been given a wired unit number, check for existing device */ 357 if (unit != -1) { 358 if (unit >= 0 && unit < dc->maxunit && 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 } 367 else { 368 /* Unwired device, find the next available slot for it */ 369 unit = 0; 370 while (unit < dc->maxunit && dc->devices[unit] != NULL) 371 unit++; 372 } 373 374 /* 375 * We've selected a unit beyond the length of the table, so let's extend 376 * the table to make room for all units up to and including 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, M_NOWAIT); 384 if (!newlist) 385 return ENOMEM; 386 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 387 bzero(newlist + dc->maxunit, 388 sizeof(device_t) * (newsize - dc->maxunit)); 389 if (dc->devices) 390 free(dc->devices, M_BUS); 391 dc->devices = newlist; 392 dc->maxunit = newsize; 393 } 394 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 395 396 *unitp = unit; 397 return 0; 398 } 399 400 static int 401 devclass_add_device(devclass_t dc, device_t dev) 402 { 403 int buflen, error; 404 405 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 406 407 buflen = strlen(dc->name) + 5; 408 dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT); 409 if (!dev->nameunit) 410 return ENOMEM; 411 bzero(dev->nameunit, buflen); 412 413 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 414 free(dev->nameunit, M_BUS); 415 dev->nameunit = NULL; 416 return error; 417 } 418 dc->devices[dev->unit] = dev; 419 dev->devclass = dc; 420 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 421 422 #ifdef DEVICE_SYSCTLS 423 device_register_oids(dev); 424 #endif 425 426 return 0; 427 } 428 429 static int 430 devclass_delete_device(devclass_t dc, device_t dev) 431 { 432 if (!dc || !dev) 433 return 0; 434 435 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 436 437 if (dev->devclass != dc 438 || dc->devices[dev->unit] != dev) 439 panic("devclass_delete_device: inconsistent device class"); 440 dc->devices[dev->unit] = NULL; 441 if (dev->flags & DF_WILDCARD) 442 dev->unit = -1; 443 dev->devclass = NULL; 444 free(dev->nameunit, M_BUS); 445 dev->nameunit = NULL; 446 447 #ifdef DEVICE_SYSCTLS 448 device_unregister_oids(dev); 449 #endif 450 451 return 0; 452 } 453 454 static device_t 455 make_device(device_t parent, const char *name, int unit) 456 { 457 device_t dev; 458 devclass_t dc; 459 460 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 461 462 if (name) { 463 dc = devclass_find_internal(name, TRUE); 464 if (!dc) { 465 printf("make_device: can't find device class %s\n", name); 466 return NULL; 467 } 468 } else 469 dc = NULL; 470 471 dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT); 472 if (!dev) 473 return 0; 474 bzero(dev, sizeof(struct device)); 475 476 dev->parent = parent; 477 TAILQ_INIT(&dev->children); 478 kobj_init((kobj_t) dev, &null_class); 479 dev->driver = NULL; 480 dev->devclass = NULL; 481 dev->unit = unit; 482 dev->nameunit = NULL; 483 dev->desc = NULL; 484 dev->busy = 0; 485 dev->devflags = 0; 486 dev->flags = DF_ENABLED; 487 dev->order = 0; 488 if (unit == -1) 489 dev->flags |= DF_WILDCARD; 490 if (name) { 491 dev->flags |= DF_FIXEDCLASS; 492 devclass_add_device(dc, dev); 493 } 494 dev->ivars = NULL; 495 dev->softc = NULL; 496 497 dev->state = DS_NOTPRESENT; 498 499 kobj_init((kobj_t) dev, &null_class); 500 501 return dev; 502 } 503 504 static int 505 device_print_child(device_t dev, device_t child) 506 { 507 int retval = 0; 508 509 if (device_is_alive(child)) { 510 retval += BUS_PRINT_CHILD(dev, child); 511 } else 512 retval += device_printf(child, " not found\n"); 513 514 return (retval); 515 } 516 517 device_t 518 device_add_child(device_t dev, const char *name, int unit) 519 { 520 return device_add_child_ordered(dev, 0, name, unit); 521 } 522 523 device_t 524 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 525 { 526 device_t child; 527 device_t place; 528 529 PDEBUG(("%s at %s with order %d as unit %d", 530 name, DEVICENAME(dev), order, unit)); 531 532 child = make_device(dev, name, unit); 533 if (child == NULL) 534 return child; 535 child->order = order; 536 537 TAILQ_FOREACH(place, &dev->children, link) 538 if (place->order > order) 539 break; 540 541 if (place) { 542 /* 543 * The device 'place' is the first device whose order is 544 * greater than the new child. 545 */ 546 TAILQ_INSERT_BEFORE(place, child, link); 547 } else { 548 /* 549 * The new child's order is greater or equal to the order of 550 * any existing device. Add the child to the tail of the list. 551 */ 552 TAILQ_INSERT_TAIL(&dev->children, child, link); 553 } 554 555 return child; 556 } 557 558 int 559 device_delete_child(device_t dev, device_t child) 560 { 561 int error; 562 device_t grandchild; 563 564 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 565 566 /* remove children first */ 567 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 568 error = device_delete_child(child, grandchild); 569 if (error) 570 return error; 571 } 572 573 if ((error = device_detach(child)) != 0) 574 return error; 575 if (child->devclass) 576 devclass_delete_device(child->devclass, child); 577 TAILQ_REMOVE(&dev->children, child, link); 578 device_set_desc(child, NULL); 579 free(child, M_BUS); 580 581 return 0; 582 } 583 584 /* 585 * Find only devices attached to this bus. 586 */ 587 device_t 588 device_find_child(device_t dev, const char *classname, int unit) 589 { 590 devclass_t dc; 591 device_t child; 592 593 dc = devclass_find(classname); 594 if (!dc) 595 return NULL; 596 597 child = devclass_get_device(dc, unit); 598 if (child && child->parent == dev) 599 return child; 600 return NULL; 601 } 602 603 static driverlink_t 604 first_matching_driver(devclass_t dc, device_t dev) 605 { 606 if (dev->devclass) 607 return devclass_find_driver_internal(dc, dev->devclass->name); 608 else 609 return TAILQ_FIRST(&dc->drivers); 610 } 611 612 static driverlink_t 613 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 614 { 615 if (dev->devclass) { 616 driverlink_t dl; 617 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 618 if (!strcmp(dev->devclass->name, dl->driver->name)) 619 return dl; 620 return NULL; 621 } else 622 return TAILQ_NEXT(last, link); 623 } 624 625 static int 626 device_probe_child(device_t dev, device_t child) 627 { 628 devclass_t dc; 629 driverlink_t best = 0; 630 driverlink_t dl; 631 int result, pri = 0; 632 int hasclass = (child->devclass != 0); 633 634 dc = dev->devclass; 635 if (!dc) 636 panic("device_probe_child: parent device has no devclass"); 637 638 if (child->state == DS_ALIVE) 639 return 0; 640 641 for (dl = first_matching_driver(dc, child); 642 dl; 643 dl = next_matching_driver(dc, child, dl)) { 644 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 645 device_set_driver(child, dl->driver); 646 if (!hasclass) 647 device_set_devclass(child, dl->driver->name); 648 result = DEVICE_PROBE(child); 649 if (!hasclass) 650 device_set_devclass(child, 0); 651 652 /* 653 * If the driver returns SUCCESS, there can be no higher match 654 * for this device. 655 */ 656 if (result == 0) { 657 best = dl; 658 pri = 0; 659 break; 660 } 661 662 /* 663 * The driver returned an error so it certainly doesn't match. 664 */ 665 if (result > 0) { 666 device_set_driver(child, 0); 667 continue; 668 } 669 670 /* 671 * A priority lower than SUCCESS, remember the best matching 672 * driver. Initialise the value of pri for the first match. 673 */ 674 if (best == 0 || result > pri) { 675 best = dl; 676 pri = result; 677 continue; 678 } 679 } 680 681 /* 682 * If we found a driver, change state and initialise the devclass. 683 */ 684 if (best) { 685 if (!child->devclass) 686 device_set_devclass(child, best->driver->name); 687 device_set_driver(child, best->driver); 688 if (pri < 0) { 689 /* 690 * A bit bogus. Call the probe method again to make sure 691 * that we have the right description. 692 */ 693 DEVICE_PROBE(child); 694 } 695 child->state = DS_ALIVE; 696 return 0; 697 } 698 699 return ENXIO; 700 } 701 702 device_t 703 device_get_parent(device_t dev) 704 { 705 return dev->parent; 706 } 707 708 int 709 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 710 { 711 int count; 712 device_t child; 713 device_t *list; 714 715 count = 0; 716 for (child = TAILQ_FIRST(&dev->children); child; 717 child = TAILQ_NEXT(child, link)) 718 count++; 719 720 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 721 if (!list) 722 return ENOMEM; 723 bzero(list, count * sizeof(device_t)); 724 725 count = 0; 726 for (child = TAILQ_FIRST(&dev->children); child; 727 child = TAILQ_NEXT(child, link)) { 728 list[count] = child; 729 count++; 730 } 731 732 *devlistp = list; 733 *devcountp = count; 734 735 return 0; 736 } 737 738 driver_t * 739 device_get_driver(device_t dev) 740 { 741 return dev->driver; 742 } 743 744 devclass_t 745 device_get_devclass(device_t dev) 746 { 747 return dev->devclass; 748 } 749 750 const char * 751 device_get_name(device_t dev) 752 { 753 if (dev->devclass) 754 return devclass_get_name(dev->devclass); 755 return NULL; 756 } 757 758 const char * 759 device_get_nameunit(device_t dev) 760 { 761 return dev->nameunit; 762 } 763 764 int 765 device_get_unit(device_t dev) 766 { 767 return dev->unit; 768 } 769 770 const char * 771 device_get_desc(device_t dev) 772 { 773 return dev->desc; 774 } 775 776 u_int32_t 777 device_get_flags(device_t dev) 778 { 779 return dev->devflags; 780 } 781 782 int 783 device_print_prettyname(device_t dev) 784 { 785 const char *name = device_get_name(dev); 786 787 if (name == 0) 788 return printf("unknown: "); 789 else 790 return printf("%s%d: ", name, device_get_unit(dev)); 791 } 792 793 int 794 device_printf(device_t dev, const char * fmt, ...) 795 { 796 va_list ap; 797 int retval; 798 799 retval = device_print_prettyname(dev); 800 va_start(ap, fmt); 801 retval += vprintf(fmt, ap); 802 va_end(ap); 803 return retval; 804 } 805 806 static void 807 device_set_desc_internal(device_t dev, const char* desc, int copy) 808 { 809 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 810 free(dev->desc, M_BUS); 811 dev->flags &= ~DF_DESCMALLOCED; 812 dev->desc = NULL; 813 } 814 815 if (copy && desc) { 816 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT); 817 if (dev->desc) { 818 strcpy(dev->desc, desc); 819 dev->flags |= DF_DESCMALLOCED; 820 } 821 } else 822 /* Avoid a -Wcast-qual warning */ 823 dev->desc = (char *)(uintptr_t) desc; 824 825 #ifdef DEVICE_SYSCTLS 826 { 827 struct sysctl_oid *oid = &dev->oid[1]; 828 oid->oid_arg1 = dev->desc ? dev->desc : ""; 829 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 830 } 831 #endif 832 } 833 834 void 835 device_set_desc(device_t dev, const char* desc) 836 { 837 device_set_desc_internal(dev, desc, FALSE); 838 } 839 840 void 841 device_set_desc_copy(device_t dev, const char* desc) 842 { 843 device_set_desc_internal(dev, desc, TRUE); 844 } 845 846 void 847 device_set_flags(device_t dev, u_int32_t flags) 848 { 849 dev->devflags = flags; 850 } 851 852 void * 853 device_get_softc(device_t dev) 854 { 855 return dev->softc; 856 } 857 858 void 859 device_set_softc(device_t dev, void *softc) 860 { 861 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 862 free(dev->softc, M_BUS); 863 dev->softc = softc; 864 if (dev->softc) 865 dev->flags |= DF_EXTERNALSOFTC; 866 else 867 dev->flags &= ~DF_EXTERNALSOFTC; 868 } 869 870 void * 871 device_get_ivars(device_t dev) 872 { 873 return dev->ivars; 874 } 875 876 void 877 device_set_ivars(device_t dev, void * ivars) 878 { 879 if (!dev) 880 return; 881 882 dev->ivars = ivars; 883 884 return; 885 } 886 887 device_state_t 888 device_get_state(device_t dev) 889 { 890 return dev->state; 891 } 892 893 void 894 device_enable(device_t dev) 895 { 896 dev->flags |= DF_ENABLED; 897 } 898 899 void 900 device_disable(device_t dev) 901 { 902 dev->flags &= ~DF_ENABLED; 903 } 904 905 void 906 device_busy(device_t dev) 907 { 908 if (dev->state < DS_ATTACHED) 909 panic("device_busy: called for unattached device"); 910 if (dev->busy == 0 && dev->parent) 911 device_busy(dev->parent); 912 dev->busy++; 913 dev->state = DS_BUSY; 914 } 915 916 void 917 device_unbusy(device_t dev) 918 { 919 if (dev->state != DS_BUSY) 920 panic("device_unbusy: called for non-busy device"); 921 dev->busy--; 922 if (dev->busy == 0) { 923 if (dev->parent) 924 device_unbusy(dev->parent); 925 dev->state = DS_ATTACHED; 926 } 927 } 928 929 void 930 device_quiet(device_t dev) 931 { 932 dev->flags |= DF_QUIET; 933 } 934 935 void 936 device_verbose(device_t dev) 937 { 938 dev->flags &= ~DF_QUIET; 939 } 940 941 int 942 device_is_quiet(device_t dev) 943 { 944 return (dev->flags & DF_QUIET) != 0; 945 } 946 947 int 948 device_is_enabled(device_t dev) 949 { 950 return (dev->flags & DF_ENABLED) != 0; 951 } 952 953 int 954 device_is_alive(device_t dev) 955 { 956 return dev->state >= DS_ALIVE; 957 } 958 959 int 960 device_set_devclass(device_t dev, const char *classname) 961 { 962 devclass_t dc; 963 964 if (!classname) { 965 if (dev->devclass) 966 devclass_delete_device(dev->devclass, dev); 967 return 0; 968 } 969 970 if (dev->devclass) { 971 printf("device_set_devclass: device class already set\n"); 972 return EINVAL; 973 } 974 975 dc = devclass_find_internal(classname, TRUE); 976 if (!dc) 977 return ENOMEM; 978 979 return devclass_add_device(dc, dev); 980 } 981 982 int 983 device_set_driver(device_t dev, driver_t *driver) 984 { 985 if (dev->state >= DS_ATTACHED) 986 return EBUSY; 987 988 if (dev->driver == driver) 989 return 0; 990 991 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 992 free(dev->softc, M_BUS); 993 dev->softc = NULL; 994 } 995 kobj_delete((kobj_t) dev, 0); 996 dev->driver = driver; 997 if (driver) { 998 kobj_init((kobj_t) dev, (kobj_class_t) driver); 999 if (!(dev->flags & DF_EXTERNALSOFTC)) { 1000 dev->softc = malloc(driver->size, M_BUS, M_NOWAIT); 1001 if (!dev->softc) { 1002 kobj_init((kobj_t) dev, &null_class); 1003 dev->driver = NULL; 1004 return ENOMEM; 1005 } 1006 bzero(dev->softc, driver->size); 1007 } 1008 } else 1009 kobj_init((kobj_t) dev, &null_class); 1010 return 0; 1011 } 1012 1013 int 1014 device_probe_and_attach(device_t dev) 1015 { 1016 device_t bus = dev->parent; 1017 int error = 0; 1018 1019 if (dev->state >= DS_ALIVE) 1020 return 0; 1021 1022 if (dev->flags & DF_ENABLED) { 1023 error = device_probe_child(bus, dev); 1024 if (!error) { 1025 if (!device_is_quiet(dev)) 1026 device_print_child(bus, dev); 1027 error = DEVICE_ATTACH(dev); 1028 if (!error) 1029 dev->state = DS_ATTACHED; 1030 else { 1031 printf("device_probe_and_attach: %s%d attach returned %d\n", 1032 dev->driver->name, dev->unit, error); 1033 device_set_driver(dev, NULL); 1034 dev->state = DS_NOTPRESENT; 1035 } 1036 } else { 1037 if (!(dev->flags & DF_DONENOMATCH)) { 1038 BUS_PROBE_NOMATCH(bus, dev); 1039 dev->flags |= DF_DONENOMATCH; 1040 } 1041 } 1042 } else { 1043 if (bootverbose) { 1044 device_print_prettyname(dev); 1045 printf("not probed (disabled)\n"); 1046 } 1047 } 1048 1049 return error; 1050 } 1051 1052 int 1053 device_detach(device_t dev) 1054 { 1055 int error; 1056 1057 PDEBUG(("%s", DEVICENAME(dev))); 1058 if (dev->state == DS_BUSY) 1059 return EBUSY; 1060 if (dev->state != DS_ATTACHED) 1061 return 0; 1062 1063 if ((error = DEVICE_DETACH(dev)) != 0) 1064 return error; 1065 device_printf(dev, "detached\n"); 1066 if (dev->parent) 1067 BUS_CHILD_DETACHED(dev->parent, dev); 1068 1069 if (!(dev->flags & DF_FIXEDCLASS)) 1070 devclass_delete_device(dev->devclass, dev); 1071 1072 dev->state = DS_NOTPRESENT; 1073 device_set_driver(dev, NULL); 1074 1075 return 0; 1076 } 1077 1078 int 1079 device_shutdown(device_t dev) 1080 { 1081 if (dev->state < DS_ATTACHED) 1082 return 0; 1083 return DEVICE_SHUTDOWN(dev); 1084 } 1085 1086 int 1087 device_set_unit(device_t dev, int unit) 1088 { 1089 devclass_t dc; 1090 int err; 1091 1092 dc = device_get_devclass(dev); 1093 if (unit < dc->maxunit && dc->devices[unit]) 1094 return EBUSY; 1095 err = devclass_delete_device(dc, dev); 1096 if (err) 1097 return err; 1098 dev->unit = unit; 1099 err = devclass_add_device(dc, dev); 1100 if (err) 1101 return err; 1102 return 0; 1103 } 1104 1105 #ifdef DEVICE_SYSCTLS 1106 1107 /* 1108 * Sysctl nodes for devices. 1109 */ 1110 1111 SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1112 1113 static int 1114 sysctl_handle_children(SYSCTL_HANDLER_ARGS) 1115 { 1116 device_t dev = arg1; 1117 device_t child; 1118 int first = 1, error = 0; 1119 1120 for (child = TAILQ_FIRST(&dev->children); child; 1121 child = TAILQ_NEXT(child, link)) { 1122 if (child->nameunit) { 1123 if (!first) { 1124 error = SYSCTL_OUT(req, ",", 1); 1125 if (error) return error; 1126 } else { 1127 first = 0; 1128 } 1129 error = SYSCTL_OUT(req, child->nameunit, strlen(child->nameunit)); 1130 if (error) return error; 1131 } 1132 } 1133 1134 error = SYSCTL_OUT(req, "", 1); 1135 1136 return error; 1137 } 1138 1139 static int 1140 sysctl_handle_state(SYSCTL_HANDLER_ARGS) 1141 { 1142 device_t dev = arg1; 1143 1144 switch (dev->state) { 1145 case DS_NOTPRESENT: 1146 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1147 case DS_ALIVE: 1148 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1149 case DS_ATTACHED: 1150 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1151 case DS_BUSY: 1152 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1153 } 1154 1155 return 0; 1156 } 1157 1158 static void 1159 device_register_oids(device_t dev) 1160 { 1161 struct sysctl_oid* oid; 1162 1163 oid = &dev->oid[0]; 1164 bzero(oid, sizeof(*oid)); 1165 oid->oid_parent = &sysctl__hw_devices_children; 1166 oid->oid_number = OID_AUTO; 1167 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1168 oid->oid_arg1 = &dev->oidlist[0]; 1169 oid->oid_arg2 = 0; 1170 oid->oid_name = dev->nameunit; 1171 oid->oid_handler = 0; 1172 oid->oid_fmt = "N"; 1173 SLIST_INIT(&dev->oidlist[0]); 1174 sysctl_register_oid(oid); 1175 1176 oid = &dev->oid[1]; 1177 bzero(oid, sizeof(*oid)); 1178 oid->oid_parent = &dev->oidlist[0]; 1179 oid->oid_number = OID_AUTO; 1180 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1181 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1182 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1183 oid->oid_name = "desc"; 1184 oid->oid_handler = sysctl_handle_string; 1185 oid->oid_fmt = "A"; 1186 sysctl_register_oid(oid); 1187 1188 oid = &dev->oid[2]; 1189 bzero(oid, sizeof(*oid)); 1190 oid->oid_parent = &dev->oidlist[0]; 1191 oid->oid_number = OID_AUTO; 1192 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1193 oid->oid_arg1 = dev; 1194 oid->oid_arg2 = 0; 1195 oid->oid_name = "children"; 1196 oid->oid_handler = sysctl_handle_children; 1197 oid->oid_fmt = "A"; 1198 sysctl_register_oid(oid); 1199 1200 oid = &dev->oid[3]; 1201 bzero(oid, sizeof(*oid)); 1202 oid->oid_parent = &dev->oidlist[0]; 1203 oid->oid_number = OID_AUTO; 1204 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1205 oid->oid_arg1 = dev; 1206 oid->oid_arg2 = 0; 1207 oid->oid_name = "state"; 1208 oid->oid_handler = sysctl_handle_state; 1209 oid->oid_fmt = "A"; 1210 sysctl_register_oid(oid); 1211 } 1212 1213 static void 1214 device_unregister_oids(device_t dev) 1215 { 1216 sysctl_unregister_oid(&dev->oid[0]); 1217 sysctl_unregister_oid(&dev->oid[1]); 1218 sysctl_unregister_oid(&dev->oid[2]); 1219 } 1220 1221 #endif 1222 1223 /*======================================*/ 1224 /* 1225 * Access functions for device resources. 1226 */ 1227 1228 /* Runtime version */ 1229 static struct config_device *devtab; 1230 static int devtab_count = 0; 1231 1232 static int 1233 resource_new_name(const char *name, int unit) 1234 { 1235 struct config_device *new; 1236 1237 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1238 if (new == NULL) 1239 return -1; 1240 if (devtab && devtab_count > 0) 1241 bcopy(devtab, new, devtab_count * sizeof(*new)); 1242 bzero(&new[devtab_count], sizeof(*new)); 1243 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_NOWAIT); 1244 if (new[devtab_count].name == NULL) { 1245 free(new, M_TEMP); 1246 return -1; 1247 } 1248 strcpy(new[devtab_count].name, name); 1249 new[devtab_count].unit = unit; 1250 new[devtab_count].resource_count = 0; 1251 new[devtab_count].resources = NULL; 1252 devtab = new; 1253 return devtab_count++; 1254 } 1255 1256 static int 1257 resource_new_resname(int j, const char *resname, resource_type type) 1258 { 1259 struct config_resource *new; 1260 int i; 1261 1262 i = devtab[j].resource_count; 1263 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1264 if (new == NULL) 1265 return -1; 1266 if (devtab[j].resources && i > 0) 1267 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1268 bzero(&new[i], sizeof(*new)); 1269 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_NOWAIT); 1270 if (new[i].name == NULL) { 1271 free(new, M_TEMP); 1272 return -1; 1273 } 1274 strcpy(new[i].name, resname); 1275 new[i].type = type; 1276 if (devtab[j].resources) 1277 free(devtab[j].resources, M_TEMP); 1278 devtab[j].resources = new; 1279 devtab[j].resource_count = i + 1; 1280 return i; 1281 } 1282 1283 static int 1284 resource_match_string(int i, const char *resname, const char *value) 1285 { 1286 int j; 1287 struct config_resource *res; 1288 1289 for (j = 0, res = devtab[i].resources; 1290 j < devtab[i].resource_count; j++, res++) 1291 if (!strcmp(res->name, resname) 1292 && res->type == RES_STRING 1293 && !strcmp(res->u.stringval, value)) 1294 return j; 1295 return -1; 1296 } 1297 1298 static int 1299 resource_find_hard(const char *cp, const char *name, int unit, 1300 const char *resname, struct config_resource **result) 1301 { 1302 char match[256]; 1303 int matchlen; 1304 char *op; 1305 long val; 1306 1307 snprintf(match, sizeof(match), "hint.%s.%d.%s=", name, unit, resname); 1308 matchlen = strlen(match); 1309 while (cp) { 1310 if (strncmp(match, cp, matchlen) == 0) 1311 break; 1312 while (*cp != '\0') 1313 cp++; 1314 cp++; 1315 if (*cp == '\0') { 1316 cp = NULL; 1317 break; 1318 } 1319 } 1320 if (cp) 1321 cp += matchlen; /* skip over name and '=' */ 1322 else 1323 return ENOENT; 1324 val = strtoul(cp, &op, 0); 1325 if (*cp != '\0' && *op == '\0') { 1326 (*result)->type = RES_INT; 1327 (*result)->u.intval = val; 1328 } else { 1329 (*result)->type = RES_STRING; 1330 (*result)->u.stringval = cp; 1331 } 1332 return 0; 1333 } 1334 1335 static int 1336 resource_find(const char *name, int unit, const char *resname, 1337 struct config_resource **result) 1338 { 1339 int i, j; 1340 struct config_resource *res; 1341 1342 if (!hints_loaded) { 1343 /* First specific, then generic. Dynamic over static. */ 1344 i = resource_find_hard(kern_envp, name, unit, resname, result); 1345 if (i == 0) 1346 return 0; 1347 i = resource_find_hard(static_hints, name, unit, resname, 1348 result); 1349 if (i == 0) 1350 return 0; 1351 i = resource_find_hard(kern_envp, name, -1, resname, result); 1352 if (i == 0) 1353 return 0; 1354 i = resource_find_hard(static_hints, name, -1, resname, result); 1355 return i; 1356 } 1357 1358 /* 1359 * First check specific instances, then generic. 1360 */ 1361 for (i = 0; i < devtab_count; i++) { 1362 if (devtab[i].unit < 0) 1363 continue; 1364 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1365 res = devtab[i].resources; 1366 for (j = 0; j < devtab[i].resource_count; j++, res++) 1367 if (!strcmp(res->name, resname)) { 1368 *result = res; 1369 return 0; 1370 } 1371 } 1372 } 1373 for (i = 0; i < devtab_count; i++) { 1374 if (devtab[i].unit >= 0) 1375 continue; 1376 if (!strcmp(devtab[i].name, name)) { 1377 res = devtab[i].resources; 1378 for (j = 0; j < devtab[i].resource_count; j++, res++) 1379 if (!strcmp(res->name, resname)) { 1380 *result = res; 1381 return 0; 1382 } 1383 } 1384 } 1385 return ENOENT; 1386 } 1387 1388 int 1389 resource_int_value(const char *name, int unit, const char *resname, int *result) 1390 { 1391 struct config_resource tmpres; 1392 struct config_resource *res; 1393 int error; 1394 1395 res = &tmpres; 1396 if ((error = resource_find(name, unit, resname, &res)) != 0) 1397 return error; 1398 if (res->type != RES_INT) 1399 return EFTYPE; 1400 *result = res->u.intval; 1401 return 0; 1402 } 1403 1404 int 1405 resource_long_value(const char *name, int unit, const char *resname, 1406 long *result) 1407 { 1408 struct config_resource tmpres; 1409 struct config_resource *res; 1410 int error; 1411 1412 res = &tmpres; 1413 if ((error = resource_find(name, unit, resname, &res)) != 0) 1414 return error; 1415 if (res->type != RES_LONG) 1416 return EFTYPE; 1417 *result = res->u.longval; 1418 return 0; 1419 } 1420 1421 int 1422 resource_string_value(const char *name, int unit, const char *resname, 1423 char **result) 1424 { 1425 struct config_resource tmpres; 1426 struct config_resource *res; 1427 int error; 1428 1429 res = &tmpres; 1430 if ((error = resource_find(name, unit, resname, &res)) != 0) 1431 return error; 1432 if (res->type != RES_STRING) 1433 return EFTYPE; 1434 *result = res->u.stringval; 1435 return 0; 1436 } 1437 1438 int 1439 resource_query_string(int i, const char *resname, const char *value) 1440 { 1441 if (i < 0) 1442 i = 0; 1443 else 1444 i = i + 1; 1445 for (; i < devtab_count; i++) 1446 if (resource_match_string(i, resname, value) >= 0) 1447 return i; 1448 return -1; 1449 } 1450 1451 int 1452 resource_locate(int i, const char *resname) 1453 { 1454 if (i < 0) 1455 i = 0; 1456 else 1457 i = i + 1; 1458 for (; i < devtab_count; i++) 1459 if (!strcmp(devtab[i].name, resname)) 1460 return i; 1461 return -1; 1462 } 1463 1464 int 1465 resource_count(void) 1466 { 1467 return devtab_count; 1468 } 1469 1470 char * 1471 resource_query_name(int i) 1472 { 1473 return devtab[i].name; 1474 } 1475 1476 int 1477 resource_query_unit(int i) 1478 { 1479 return devtab[i].unit; 1480 } 1481 1482 static int 1483 resource_create(const char *name, int unit, const char *resname, 1484 resource_type type, struct config_resource **result) 1485 { 1486 int i, j; 1487 struct config_resource *res = NULL; 1488 1489 for (i = 0; i < devtab_count; i++) { 1490 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1491 res = devtab[i].resources; 1492 break; 1493 } 1494 } 1495 if (res == NULL) { 1496 i = resource_new_name(name, unit); 1497 if (i < 0) 1498 return ENOMEM; 1499 res = devtab[i].resources; 1500 } 1501 for (j = 0; j < devtab[i].resource_count; j++, res++) { 1502 if (!strcmp(res->name, resname)) { 1503 *result = res; 1504 return 0; 1505 } 1506 } 1507 j = resource_new_resname(i, resname, type); 1508 if (j < 0) 1509 return ENOMEM; 1510 res = &devtab[i].resources[j]; 1511 *result = res; 1512 return 0; 1513 } 1514 1515 int 1516 resource_set_int(const char *name, int unit, const char *resname, int value) 1517 { 1518 int error; 1519 struct config_resource *res; 1520 1521 error = resource_create(name, unit, resname, RES_INT, &res); 1522 if (error) 1523 return error; 1524 if (res->type != RES_INT) 1525 return EFTYPE; 1526 res->u.intval = value; 1527 return 0; 1528 } 1529 1530 int 1531 resource_set_long(const char *name, int unit, const char *resname, long value) 1532 { 1533 int error; 1534 struct config_resource *res; 1535 1536 error = resource_create(name, unit, resname, RES_LONG, &res); 1537 if (error) 1538 return error; 1539 if (res->type != RES_LONG) 1540 return EFTYPE; 1541 res->u.longval = value; 1542 return 0; 1543 } 1544 1545 int 1546 resource_set_string(const char *name, int unit, const char *resname, 1547 const char *value) 1548 { 1549 int error; 1550 struct config_resource *res; 1551 1552 error = resource_create(name, unit, resname, RES_STRING, &res); 1553 if (error) 1554 return error; 1555 if (res->type != RES_STRING) 1556 return EFTYPE; 1557 if (res->u.stringval) 1558 free(res->u.stringval, M_TEMP); 1559 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_NOWAIT); 1560 if (res->u.stringval == NULL) 1561 return ENOMEM; 1562 strcpy(res->u.stringval, value); 1563 return 0; 1564 } 1565 1566 /* 1567 * We use the identify routine to get the hints for all the other devices. 1568 * Strings that are all digits or begin with 0x are integers. 1569 * 1570 * hint.aha.0.bus_speedup=1 1571 * hint.aha.1.irq=10 1572 * hint.wl.0.netid=PLUG 1573 * hint.wl.1.netid=XYZZY 1574 */ 1575 static void 1576 hint_load(char *cp) 1577 { 1578 char *ep, *op, *walker; 1579 int len; 1580 int val; 1581 char name[20]; 1582 int unit; 1583 char resname[255]; 1584 1585 for (ep = cp; *ep != '=' && *ep != '\0'; ep++) 1586 ; 1587 len = ep - cp; 1588 if (*ep == '=') 1589 ep++; 1590 if (strncmp(cp, "hint.", 5) != 0) 1591 return; 1592 walker = cp; 1593 walker += 5; 1594 op = walker; 1595 while (*walker && *walker != '.') 1596 walker++; 1597 if (*walker != '.') 1598 return; 1599 if (walker - op > sizeof(name)) 1600 return; 1601 strncpy(name, op, walker - op); 1602 name[walker - op] = '\0'; 1603 walker++; 1604 op = walker; 1605 while (*walker && *walker != '.') 1606 walker++; 1607 if (*walker != '.') 1608 return; 1609 unit = strtoul(op, &walker, 0); 1610 if (*walker != '.') 1611 return; 1612 walker++; 1613 op = walker; 1614 while (*walker && *walker != '=') 1615 walker++; 1616 if (*walker != '=') 1617 return; 1618 if (walker - op > sizeof(resname)) 1619 return; 1620 strncpy(resname, op, walker - op); 1621 resname[walker - op] = '\0'; 1622 walker++; 1623 if (walker != ep) 1624 return; 1625 if (bootverbose) 1626 printf("Setting %s %d %s to ", name, unit, resname); 1627 val = strtoul(ep, &op, 0); 1628 if (*ep != '\0' && *op == '\0') { 1629 resource_set_int(name, unit, resname, val); 1630 if (bootverbose) 1631 printf("%d (int)\n", val); 1632 } else { 1633 resource_set_string(name, unit, resname, ep); 1634 if (bootverbose) 1635 printf("%s (string)\n", ep); 1636 } 1637 } 1638 1639 1640 static void 1641 hints_load(void *dummy __unused) 1642 { 1643 char *cp; 1644 1645 cp = static_hints; 1646 while (cp) { 1647 hint_load(cp); 1648 while (*cp != '\0') 1649 cp++; 1650 cp++; 1651 if (*cp == '\0') 1652 break; 1653 } 1654 cp = kern_envp; 1655 while (cp) { 1656 hint_load(cp); 1657 while (*cp != '\0') 1658 cp++; 1659 cp++; 1660 if (*cp == '\0') 1661 break; 1662 } 1663 hints_loaded++; 1664 } 1665 SYSINIT(cfghints, SI_SUB_KMEM, SI_ORDER_ANY + 60, hints_load, 0) 1666 1667 /*======================================*/ 1668 /* 1669 * Some useful method implementations to make life easier for bus drivers. 1670 */ 1671 1672 void 1673 resource_list_init(struct resource_list *rl) 1674 { 1675 SLIST_INIT(rl); 1676 } 1677 1678 void 1679 resource_list_free(struct resource_list *rl) 1680 { 1681 struct resource_list_entry *rle; 1682 1683 while ((rle = SLIST_FIRST(rl)) != NULL) { 1684 if (rle->res) 1685 panic("resource_list_free: resource entry is busy"); 1686 SLIST_REMOVE_HEAD(rl, link); 1687 free(rle, M_BUS); 1688 } 1689 } 1690 1691 void 1692 resource_list_add(struct resource_list *rl, 1693 int type, int rid, 1694 u_long start, u_long end, u_long count) 1695 { 1696 struct resource_list_entry *rle; 1697 1698 rle = resource_list_find(rl, type, rid); 1699 if (!rle) { 1700 rle = malloc(sizeof(struct resource_list_entry), M_BUS, M_NOWAIT); 1701 if (!rle) 1702 panic("resource_list_add: can't record entry"); 1703 SLIST_INSERT_HEAD(rl, rle, link); 1704 rle->type = type; 1705 rle->rid = rid; 1706 rle->res = NULL; 1707 } 1708 1709 if (rle->res) 1710 panic("resource_list_add: resource entry is busy"); 1711 1712 rle->start = start; 1713 rle->end = end; 1714 rle->count = count; 1715 } 1716 1717 struct resource_list_entry* 1718 resource_list_find(struct resource_list *rl, 1719 int type, int rid) 1720 { 1721 struct resource_list_entry *rle; 1722 1723 SLIST_FOREACH(rle, rl, link) 1724 if (rle->type == type && rle->rid == rid) 1725 return rle; 1726 return NULL; 1727 } 1728 1729 void 1730 resource_list_delete(struct resource_list *rl, 1731 int type, int rid) 1732 { 1733 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1734 1735 if (rle) { 1736 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1737 free(rle, M_BUS); 1738 } 1739 } 1740 1741 struct resource * 1742 resource_list_alloc(struct resource_list *rl, 1743 device_t bus, device_t child, 1744 int type, int *rid, 1745 u_long start, u_long end, 1746 u_long count, u_int flags) 1747 { 1748 struct resource_list_entry *rle = 0; 1749 int passthrough = (device_get_parent(child) != bus); 1750 int isdefault = (start == 0UL && end == ~0UL); 1751 1752 if (passthrough) { 1753 return BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1754 type, rid, 1755 start, end, count, flags); 1756 } 1757 1758 rle = resource_list_find(rl, type, *rid); 1759 1760 if (!rle) 1761 return 0; /* no resource of that type/rid */ 1762 if (rle->res) 1763 panic("resource_list_alloc: resource entry is busy"); 1764 1765 if (isdefault) { 1766 start = rle->start; 1767 count = max(count, rle->count); 1768 end = max(rle->end, start + count - 1); 1769 } 1770 1771 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1772 type, rid, start, end, count, flags); 1773 1774 /* 1775 * Record the new range. 1776 */ 1777 if (rle->res) { 1778 rle->start = rman_get_start(rle->res); 1779 rle->end = rman_get_end(rle->res); 1780 rle->count = count; 1781 } 1782 1783 return rle->res; 1784 } 1785 1786 int 1787 resource_list_release(struct resource_list *rl, 1788 device_t bus, device_t child, 1789 int type, int rid, struct resource *res) 1790 { 1791 struct resource_list_entry *rle = 0; 1792 int passthrough = (device_get_parent(child) != bus); 1793 int error; 1794 1795 if (passthrough) { 1796 return BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1797 type, rid, res); 1798 } 1799 1800 rle = resource_list_find(rl, type, rid); 1801 1802 if (!rle) 1803 panic("resource_list_release: can't find resource"); 1804 if (!rle->res) 1805 panic("resource_list_release: resource entry is not busy"); 1806 1807 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1808 type, rid, res); 1809 if (error) 1810 return error; 1811 1812 rle->res = NULL; 1813 return 0; 1814 } 1815 1816 /* 1817 * Call DEVICE_IDENTIFY for each driver. 1818 */ 1819 int 1820 bus_generic_probe(device_t dev) 1821 { 1822 devclass_t dc = dev->devclass; 1823 driverlink_t dl; 1824 1825 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) 1826 DEVICE_IDENTIFY(dl->driver, dev); 1827 1828 return 0; 1829 } 1830 1831 int 1832 bus_generic_attach(device_t dev) 1833 { 1834 device_t child; 1835 1836 for (child = TAILQ_FIRST(&dev->children); 1837 child; child = TAILQ_NEXT(child, link)) 1838 device_probe_and_attach(child); 1839 1840 return 0; 1841 } 1842 1843 int 1844 bus_generic_detach(device_t dev) 1845 { 1846 device_t child; 1847 int error; 1848 1849 if (dev->state != DS_ATTACHED) 1850 return EBUSY; 1851 1852 for (child = TAILQ_FIRST(&dev->children); 1853 child; child = TAILQ_NEXT(child, link)) 1854 if ((error = device_detach(child)) != 0) 1855 return error; 1856 1857 return 0; 1858 } 1859 1860 int 1861 bus_generic_shutdown(device_t dev) 1862 { 1863 device_t child; 1864 1865 for (child = TAILQ_FIRST(&dev->children); 1866 child; child = TAILQ_NEXT(child, link)) 1867 device_shutdown(child); 1868 1869 return 0; 1870 } 1871 1872 int 1873 bus_generic_suspend(device_t dev) 1874 { 1875 int error; 1876 device_t child, child2; 1877 1878 for (child = TAILQ_FIRST(&dev->children); 1879 child; child = TAILQ_NEXT(child, link)) { 1880 error = DEVICE_SUSPEND(child); 1881 if (error) { 1882 for (child2 = TAILQ_FIRST(&dev->children); 1883 child2 && child2 != child; 1884 child2 = TAILQ_NEXT(child2, link)) 1885 DEVICE_RESUME(child2); 1886 return (error); 1887 } 1888 } 1889 return 0; 1890 } 1891 1892 int 1893 bus_generic_resume(device_t dev) 1894 { 1895 device_t child; 1896 1897 for (child = TAILQ_FIRST(&dev->children); 1898 child; child = TAILQ_NEXT(child, link)) { 1899 DEVICE_RESUME(child); 1900 /* if resume fails, there's nothing we can usefully do... */ 1901 } 1902 return 0; 1903 } 1904 1905 int 1906 bus_print_child_header (device_t dev, device_t child) 1907 { 1908 int retval = 0; 1909 1910 if (device_get_desc(child)) { 1911 retval += device_printf(child, "<%s>", 1912 device_get_desc(child)); 1913 } else { 1914 retval += printf("%s", device_get_nameunit(child)); 1915 } 1916 1917 return (retval); 1918 } 1919 1920 int 1921 bus_print_child_footer (device_t dev, device_t child) 1922 { 1923 return(printf(" on %s\n", device_get_nameunit(dev))); 1924 } 1925 1926 int 1927 bus_generic_print_child(device_t dev, device_t child) 1928 { 1929 int retval = 0; 1930 1931 retval += bus_print_child_header(dev, child); 1932 retval += bus_print_child_footer(dev, child); 1933 1934 return (retval); 1935 } 1936 1937 int 1938 bus_generic_read_ivar(device_t dev, device_t child, int index, 1939 uintptr_t * result) 1940 { 1941 return ENOENT; 1942 } 1943 1944 int 1945 bus_generic_write_ivar(device_t dev, device_t child, int index, 1946 uintptr_t value) 1947 { 1948 return ENOENT; 1949 } 1950 1951 void 1952 bus_generic_driver_added(device_t dev, driver_t *driver) 1953 { 1954 device_t child; 1955 1956 DEVICE_IDENTIFY(driver, dev); 1957 for (child = TAILQ_FIRST(&dev->children); 1958 child; child = TAILQ_NEXT(child, link)) 1959 if (child->state == DS_NOTPRESENT) 1960 device_probe_and_attach(child); 1961 } 1962 1963 int 1964 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1965 int flags, driver_intr_t *intr, void *arg, 1966 void **cookiep) 1967 { 1968 /* Propagate up the bus hierarchy until someone handles it. */ 1969 if (dev->parent) 1970 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1971 intr, arg, cookiep)); 1972 else 1973 return (EINVAL); 1974 } 1975 1976 int 1977 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1978 void *cookie) 1979 { 1980 /* Propagate up the bus hierarchy until someone handles it. */ 1981 if (dev->parent) 1982 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1983 else 1984 return (EINVAL); 1985 } 1986 1987 struct resource * 1988 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1989 u_long start, u_long end, u_long count, u_int flags) 1990 { 1991 /* Propagate up the bus hierarchy until someone handles it. */ 1992 if (dev->parent) 1993 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1994 start, end, count, flags)); 1995 else 1996 return (NULL); 1997 } 1998 1999 int 2000 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2001 struct resource *r) 2002 { 2003 /* Propagate up the bus hierarchy until someone handles it. */ 2004 if (dev->parent) 2005 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 2006 r)); 2007 else 2008 return (EINVAL); 2009 } 2010 2011 int 2012 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2013 struct resource *r) 2014 { 2015 /* Propagate up the bus hierarchy until someone handles it. */ 2016 if (dev->parent) 2017 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 2018 r)); 2019 else 2020 return (EINVAL); 2021 } 2022 2023 int 2024 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2025 int rid, struct resource *r) 2026 { 2027 /* Propagate up the bus hierarchy until someone handles it. */ 2028 if (dev->parent) 2029 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2030 r)); 2031 else 2032 return (EINVAL); 2033 } 2034 2035 /* 2036 * Some convenience functions to make it easier for drivers to use the 2037 * resource-management functions. All these really do is hide the 2038 * indirection through the parent's method table, making for slightly 2039 * less-wordy code. In the future, it might make sense for this code 2040 * to maintain some sort of a list of resources allocated by each device. 2041 */ 2042 struct resource * 2043 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2044 u_long count, u_int flags) 2045 { 2046 if (dev->parent == 0) 2047 return (0); 2048 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2049 count, flags)); 2050 } 2051 2052 int 2053 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2054 { 2055 if (dev->parent == 0) 2056 return (EINVAL); 2057 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2058 } 2059 2060 int 2061 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2062 { 2063 if (dev->parent == 0) 2064 return (EINVAL); 2065 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2066 } 2067 2068 int 2069 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2070 { 2071 if (dev->parent == 0) 2072 return (EINVAL); 2073 return (BUS_RELEASE_RESOURCE(dev->parent, dev, 2074 type, rid, r)); 2075 } 2076 2077 int 2078 bus_setup_intr(device_t dev, struct resource *r, int flags, 2079 driver_intr_t handler, void *arg, void **cookiep) 2080 { 2081 if (dev->parent == 0) 2082 return (EINVAL); 2083 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 2084 handler, arg, cookiep)); 2085 } 2086 2087 int 2088 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2089 { 2090 if (dev->parent == 0) 2091 return (EINVAL); 2092 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2093 } 2094 2095 int 2096 bus_set_resource(device_t dev, int type, int rid, 2097 u_long start, u_long count) 2098 { 2099 return BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2100 start, count); 2101 } 2102 2103 int 2104 bus_get_resource(device_t dev, int type, int rid, 2105 u_long *startp, u_long *countp) 2106 { 2107 return BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2108 startp, countp); 2109 } 2110 2111 u_long 2112 bus_get_resource_start(device_t dev, int type, int rid) 2113 { 2114 u_long start, count; 2115 int error; 2116 2117 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2118 &start, &count); 2119 if (error) 2120 return 0; 2121 return start; 2122 } 2123 2124 u_long 2125 bus_get_resource_count(device_t dev, int type, int rid) 2126 { 2127 u_long start, count; 2128 int error; 2129 2130 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2131 &start, &count); 2132 if (error) 2133 return 0; 2134 return count; 2135 } 2136 2137 void 2138 bus_delete_resource(device_t dev, int type, int rid) 2139 { 2140 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2141 } 2142 2143 static int 2144 root_print_child(device_t dev, device_t child) 2145 { 2146 return (0); 2147 } 2148 2149 static int 2150 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2151 void **cookiep) 2152 { 2153 /* 2154 * If an interrupt mapping gets to here something bad has happened. 2155 */ 2156 panic("root_setup_intr"); 2157 } 2158 2159 static kobj_method_t root_methods[] = { 2160 /* Device interface */ 2161 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2162 KOBJMETHOD(device_suspend, bus_generic_suspend), 2163 KOBJMETHOD(device_resume, bus_generic_resume), 2164 2165 /* Bus interface */ 2166 KOBJMETHOD(bus_print_child, root_print_child), 2167 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2168 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2169 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2170 2171 { 0, 0 } 2172 }; 2173 2174 static driver_t root_driver = { 2175 "root", 2176 root_methods, 2177 1, /* no softc */ 2178 }; 2179 2180 device_t root_bus; 2181 devclass_t root_devclass; 2182 2183 static int 2184 root_bus_module_handler(module_t mod, int what, void* arg) 2185 { 2186 switch (what) { 2187 case MOD_LOAD: 2188 kobj_class_compile((kobj_class_t) &root_driver); 2189 root_bus = make_device(NULL, "root", 0); 2190 root_bus->desc = "System root bus"; 2191 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2192 root_bus->driver = &root_driver; 2193 root_bus->state = DS_ATTACHED; 2194 root_devclass = devclass_find_internal("root", FALSE); 2195 return 0; 2196 2197 case MOD_SHUTDOWN: 2198 device_shutdown(root_bus); 2199 return 0; 2200 } 2201 2202 return 0; 2203 } 2204 2205 static moduledata_t root_bus_mod = { 2206 "rootbus", 2207 root_bus_module_handler, 2208 0 2209 }; 2210 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2211 2212 void 2213 root_bus_configure(void) 2214 { 2215 device_t dev; 2216 2217 PDEBUG((".")); 2218 2219 for (dev = TAILQ_FIRST(&root_bus->children); dev; 2220 dev = TAILQ_NEXT(dev, link)) { 2221 device_probe_and_attach(dev); 2222 } 2223 } 2224 2225 int 2226 driver_module_handler(module_t mod, int what, void *arg) 2227 { 2228 int error, i; 2229 struct driver_module_data *dmd; 2230 devclass_t bus_devclass; 2231 2232 dmd = (struct driver_module_data *)arg; 2233 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2234 error = 0; 2235 2236 switch (what) { 2237 case MOD_LOAD: 2238 if (dmd->dmd_chainevh) 2239 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2240 2241 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2242 PDEBUG(("Loading module: driver %s on bus %s", 2243 DRIVERNAME(dmd->dmd_drivers[i]), 2244 dmd->dmd_busname)); 2245 error = devclass_add_driver(bus_devclass, 2246 dmd->dmd_drivers[i]); 2247 } 2248 if (error) 2249 break; 2250 2251 /* 2252 * The drivers loaded in this way are assumed to all 2253 * implement the same devclass. 2254 */ 2255 *dmd->dmd_devclass = 2256 devclass_find_internal(dmd->dmd_drivers[0]->name, 2257 TRUE); 2258 break; 2259 2260 case MOD_UNLOAD: 2261 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2262 PDEBUG(("Unloading module: driver %s from bus %s", 2263 DRIVERNAME(dmd->dmd_drivers[i]), 2264 dmd->dmd_busname)); 2265 error = devclass_delete_driver(bus_devclass, 2266 dmd->dmd_drivers[i]); 2267 } 2268 2269 if (!error && dmd->dmd_chainevh) 2270 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2271 break; 2272 } 2273 2274 return (error); 2275 } 2276 2277 #ifdef BUS_DEBUG 2278 2279 /* the _short versions avoid iteration by not calling anything that prints 2280 * more than oneliners. I love oneliners. 2281 */ 2282 2283 static void 2284 print_device_short(device_t dev, int indent) 2285 { 2286 if (!dev) 2287 return; 2288 2289 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2290 dev->unit, dev->desc, 2291 (dev->parent? "":"no "), 2292 (TAILQ_EMPTY(&dev->children)? "no ":""), 2293 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2294 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2295 (dev->flags&DF_WILDCARD? "wildcard,":""), 2296 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2297 (dev->ivars? "":"no "), 2298 (dev->softc? "":"no "), 2299 dev->busy)); 2300 } 2301 2302 static void 2303 print_device(device_t dev, int indent) 2304 { 2305 if (!dev) 2306 return; 2307 2308 print_device_short(dev, indent); 2309 2310 indentprintf(("Parent:\n")); 2311 print_device_short(dev->parent, indent+1); 2312 indentprintf(("Driver:\n")); 2313 print_driver_short(dev->driver, indent+1); 2314 indentprintf(("Devclass:\n")); 2315 print_devclass_short(dev->devclass, indent+1); 2316 } 2317 2318 void 2319 print_device_tree_short(device_t dev, int indent) 2320 /* print the device and all its children (indented) */ 2321 { 2322 device_t child; 2323 2324 if (!dev) 2325 return; 2326 2327 print_device_short(dev, indent); 2328 2329 for (child = TAILQ_FIRST(&dev->children); child; 2330 child = TAILQ_NEXT(child, link)) 2331 print_device_tree_short(child, indent+1); 2332 } 2333 2334 void 2335 print_device_tree(device_t dev, int indent) 2336 /* print the device and all its children (indented) */ 2337 { 2338 device_t child; 2339 2340 if (!dev) 2341 return; 2342 2343 print_device(dev, indent); 2344 2345 for (child = TAILQ_FIRST(&dev->children); child; 2346 child = TAILQ_NEXT(child, link)) 2347 print_device_tree(child, indent+1); 2348 } 2349 2350 static void 2351 print_driver_short(driver_t *driver, int indent) 2352 { 2353 if (!driver) 2354 return; 2355 2356 indentprintf(("driver %s: softc size = %d\n", 2357 driver->name, driver->size)); 2358 } 2359 2360 static void 2361 print_driver(driver_t *driver, int indent) 2362 { 2363 if (!driver) 2364 return; 2365 2366 print_driver_short(driver, indent); 2367 } 2368 2369 2370 static void 2371 print_driver_list(driver_list_t drivers, int indent) 2372 { 2373 driverlink_t driver; 2374 2375 for (driver = TAILQ_FIRST(&drivers); driver; 2376 driver = TAILQ_NEXT(driver, link)) 2377 print_driver(driver->driver, indent); 2378 } 2379 2380 static void 2381 print_devclass_short(devclass_t dc, int indent) 2382 { 2383 if ( !dc ) 2384 return; 2385 2386 indentprintf(("devclass %s: max units = %d\n", 2387 dc->name, dc->maxunit)); 2388 } 2389 2390 static void 2391 print_devclass(devclass_t dc, int indent) 2392 { 2393 int i; 2394 2395 if ( !dc ) 2396 return; 2397 2398 print_devclass_short(dc, indent); 2399 indentprintf(("Drivers:\n")); 2400 print_driver_list(dc->drivers, indent+1); 2401 2402 indentprintf(("Devices:\n")); 2403 for (i = 0; i < dc->maxunit; i++) 2404 if (dc->devices[i]) 2405 print_device(dc->devices[i], indent+1); 2406 } 2407 2408 void 2409 print_devclass_list_short(void) 2410 { 2411 devclass_t dc; 2412 2413 printf("Short listing of devclasses, drivers & devices:\n"); 2414 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2415 print_devclass_short(dc, 0); 2416 } 2417 2418 void 2419 print_devclass_list(void) 2420 { 2421 devclass_t dc; 2422 2423 printf("Full listing of devclasses, drivers & devices:\n"); 2424 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2425 print_devclass(dc, 0); 2426 } 2427 2428 #endif 2429