subr_bus.c revision 47537
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 * $Id: subr_bus.c,v 1.26 1999/05/22 14:57:15 dfr Exp $ 27 */ 28 29#include <sys/param.h> 30#include <sys/queue.h> 31#include <sys/malloc.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/sysctl.h> 35#include <sys/bus_private.h> 36#include <sys/systm.h> 37#include <machine/bus.h> 38#include <sys/rman.h> 39#include <machine/stdarg.h> /* for device_printf() */ 40 41#include "opt_bus.h" 42 43#ifdef BUS_DEBUG 44#define PDEBUG(a) (printf(__FUNCTION__ ":%d: ", __LINE__), printf a, printf("\n")) 45#define DEVICENAME(d) ((d)? device_get_name(d): "no device") 46#define DRIVERNAME(d) ((d)? d->name : "no driver") 47#define DEVCLANAME(d) ((d)? d->name : "no devclass") 48 49/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 50 * prevent syslog from deleting initial spaces 51 */ 52#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while(0) 53 54static void print_method_list(device_method_t *m, int indent); 55static void print_device_ops(device_ops_t ops, int indent); 56static void print_device_short(device_t dev, int indent); 57static void print_device(device_t dev, int indent); 58void print_device_tree_short(device_t dev, int indent); 59void print_device_tree(device_t dev, int indent); 60static void print_driver_short(driver_t *driver, int indent); 61static void print_driver(driver_t *driver, int indent); 62static void print_driver_list(driver_list_t drivers, int indent); 63static void print_devclass_short(devclass_t dc, int indent); 64static void print_devclass(devclass_t dc, int indent); 65void print_devclass_list_short(void); 66void print_devclass_list(void); 67 68#else 69/* Make the compiler ignore the function calls */ 70#define PDEBUG(a) /* nop */ 71#define DEVICENAME(d) /* nop */ 72#define DRIVERNAME(d) /* nop */ 73#define DEVCLANAME(d) /* nop */ 74 75#define print_method_list(m,i) /* nop */ 76#define print_device_ops(o,i) /* nop */ 77#define print_device_short(d,i) /* nop */ 78#define print_device(d,i) /* nop */ 79#define print_device_tree_short(d,i) /* nop */ 80#define print_device_tree(d,i) /* nop */ 81#define print_driver_short(d,i) /* nop */ 82#define print_driver(d,i) /* nop */ 83#define print_driver_list(d,i) /* nop */ 84#define print_devclass_short(d,i) /* nop */ 85#define print_devclass(d,i) /* nop */ 86#define print_devclass_list_short() /* nop */ 87#define print_devclass_list() /* nop */ 88#endif 89 90#ifdef DEVICE_SYSCTLS 91static void device_register_oids(device_t dev); 92static void device_unregister_oids(device_t dev); 93#endif 94 95/* 96 * Method table handling 97 */ 98static int error_method(void); 99static int next_method_offset = 1; 100 101LIST_HEAD(methodlist, method) methods; 102struct method { 103 LIST_ENTRY(method) link; /* linked list of methods */ 104 int offset; /* offset in method table */ 105 int refs; /* count of device_op_desc users */ 106 devop_t deflt; /* default implementation */ 107 char* name; /* unique name of method */ 108}; 109 110static void 111register_method(struct device_op_desc *desc) 112{ 113 struct method* m; 114 115 if (desc->method) { 116 desc->method->refs++; 117 return; 118 } 119 120 /* 121 * Make sure that desc->deflt is always valid to simplify dispatch. 122 */ 123 if (!desc->deflt) 124 desc->deflt = error_method; 125 126 for (m = LIST_FIRST(&methods); m; m = LIST_NEXT(m, link)) { 127 if (!strcmp(m->name, desc->name)) { 128 desc->offset = m->offset; 129 desc->method = m; 130 m->refs++; 131 PDEBUG(("methods %x has the same name, %s, with offset %d", 132 m, desc->name, desc->offset)); 133 return; 134 } 135 } 136 137 m = (struct method *) malloc(sizeof(struct method) 138 + strlen(desc->name) + 1, 139 M_DEVBUF, M_NOWAIT); 140 if (!m) 141 panic("register_method: out of memory"); 142 bzero(m, sizeof(struct method) + strlen(desc->name) + 1); 143 m->offset = next_method_offset++; 144 m->refs = 1; 145 m->deflt = desc->deflt; 146 m->name = (char*) (m + 1); 147 strcpy(m->name, desc->name); 148 LIST_INSERT_HEAD(&methods, m, link); 149 150 desc->offset = m->offset; 151 desc->method = m; 152} 153 154static void 155unregister_method(struct device_op_desc *desc) 156{ 157 struct method *m = desc->method; 158 m->refs--; 159 if (m->refs == 0) { 160 LIST_REMOVE(m, link); 161 free(m, M_DEVBUF); 162 } 163 desc->method = 0; 164} 165 166static int error_method(void) 167{ 168 return ENXIO; 169} 170 171static struct device_ops null_ops = { 172 1, 173 { error_method } 174}; 175 176static void 177compile_methods(driver_t *driver) 178{ 179 device_ops_t ops; 180 struct device_method *m; 181 struct method *cm; 182 int i; 183 184 /* 185 * First register any methods which need it. 186 */ 187 for (i = 0, m = driver->methods; m->desc; i++, m++) 188 register_method(m->desc); 189 190 /* 191 * Then allocate the compiled op table. 192 */ 193 ops = malloc(sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t), 194 M_DEVBUF, M_NOWAIT); 195 if (!ops) 196 panic("compile_methods: out of memory"); 197 bzero(ops, sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t)); 198 199 ops->maxoffset = next_method_offset; 200 /* Fill in default methods and then overwrite with driver methods */ 201 for (i = 0; i < next_method_offset; i++) 202 ops->methods[i] = error_method; 203 for (cm = LIST_FIRST(&methods); cm; cm = LIST_NEXT(cm, link)) { 204 if (cm->deflt) 205 ops->methods[cm->offset] = cm->deflt; 206 } 207 for (i = 0, m = driver->methods; m->desc; i++, m++) 208 ops->methods[m->desc->offset] = m->func; 209 PDEBUG(("%s has %d method%s, wasting %d bytes", 210 DRIVERNAME(driver), i, (i==1?"":"s"), 211 (next_method_offset-i)*sizeof(devop_t))); 212 213 driver->ops = ops; 214} 215 216static void 217free_methods(driver_t *driver) 218{ 219 int i; 220 struct device_method *m; 221 222 /* 223 * Unregister any methods which are no longer used. 224 */ 225 for (i = 0, m = driver->methods; m->desc; i++, m++) 226 unregister_method(m->desc); 227 228 /* 229 * Free memory and clean up. 230 */ 231 free(driver->ops, M_DEVBUF); 232 driver->ops = 0; 233} 234 235/* 236 * Devclass implementation 237 */ 238 239static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 240 241static devclass_t 242devclass_find_internal(const char *classname, int create) 243{ 244 devclass_t dc; 245 246 PDEBUG(("looking for %s", classname)); 247 if (!classname) 248 return NULL; 249 250 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 251 if (!strcmp(dc->name, classname)) 252 return dc; 253 254 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 255 if (create) { 256 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 257 M_DEVBUF, M_NOWAIT); 258 if (!dc) 259 return NULL; 260 bzero(dc, sizeof(struct devclass) + strlen(classname) + 1); 261 dc->name = (char*) (dc + 1); 262 strcpy(dc->name, classname); 263 dc->devices = NULL; 264 dc->maxunit = 0; 265 dc->nextunit = 0; 266 TAILQ_INIT(&dc->drivers); 267 TAILQ_INSERT_TAIL(&devclasses, dc, link); 268 } 269 270 return dc; 271} 272 273devclass_t 274devclass_find(const char *classname) 275{ 276 return devclass_find_internal(classname, FALSE); 277} 278 279int 280devclass_add_driver(devclass_t dc, driver_t *driver) 281{ 282 driverlink_t dl; 283 int i; 284 285 PDEBUG(("%s", DRIVERNAME(driver))); 286 287 dl = malloc(sizeof *dl, M_DEVBUF, M_NOWAIT); 288 if (!dl) 289 return ENOMEM; 290 bzero(dl, sizeof *dl); 291 292 /* 293 * Compile the driver's methods. 294 */ 295 if (!driver->ops) 296 compile_methods(driver); 297 298 /* 299 * Make sure the devclass which the driver is implementing exists. 300 */ 301 devclass_find_internal(driver->name, TRUE); 302 303 dl->driver = driver; 304 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 305 driver->refs++; 306 307 /* 308 * Call BUS_DRIVER_ADDED for any existing busses in this class. 309 */ 310 for (i = 0; i < dc->maxunit; i++) 311 if (dc->devices[i]) 312 BUS_DRIVER_ADDED(dc->devices[i], driver); 313 314 return 0; 315} 316 317int 318devclass_delete_driver(devclass_t busclass, driver_t *driver) 319{ 320 devclass_t dc = devclass_find(driver->name); 321 driverlink_t dl; 322 device_t dev; 323 int i; 324 int error; 325 326 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 327 328 if (!dc) 329 return 0; 330 331 /* 332 * Find the link structure in the bus' list of drivers. 333 */ 334 for (dl = TAILQ_FIRST(&busclass->drivers); dl; 335 dl = TAILQ_NEXT(dl, link)) { 336 if (dl->driver == driver) 337 break; 338 } 339 340 if (!dl) { 341 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 342 return ENOENT; 343 } 344 345 /* 346 * Disassociate from any devices. We iterate through all the 347 * devices in the devclass of the driver and detach any which are 348 * using the driver and which have a parent in the devclass which 349 * we are deleting from. 350 * 351 * Note that since a driver can be in multiple devclasses, we 352 * should not detach devices which are not children of devices in 353 * the affected devclass. 354 */ 355 for (i = 0; i < dc->maxunit; i++) { 356 if (dc->devices[i]) { 357 dev = dc->devices[i]; 358 if (dev->driver == driver 359 && dev->parent && dev->parent->devclass == busclass) { 360 if ((error = device_detach(dev)) != 0) 361 return error; 362 device_set_driver(dev, NULL); 363 } 364 } 365 } 366 367 TAILQ_REMOVE(&busclass->drivers, dl, link); 368 free(dl, M_DEVBUF); 369 370 driver->refs--; 371 if (driver->refs == 0) 372 free_methods(driver); 373 374 return 0; 375} 376 377static driverlink_t 378devclass_find_driver_internal(devclass_t dc, const char *classname) 379{ 380 driverlink_t dl; 381 382 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 383 384 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) { 385 if (!strcmp(dl->driver->name, classname)) 386 return dl; 387 } 388 389 PDEBUG(("not found")); 390 return NULL; 391} 392 393driver_t * 394devclass_find_driver(devclass_t dc, const char *classname) 395{ 396 driverlink_t dl; 397 398 dl = devclass_find_driver_internal(dc, classname); 399 if (dl) 400 return dl->driver; 401 else 402 return NULL; 403} 404 405const char * 406devclass_get_name(devclass_t dc) 407{ 408 return dc->name; 409} 410 411device_t 412devclass_get_device(devclass_t dc, int unit) 413{ 414 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 415 return NULL; 416 return dc->devices[unit]; 417} 418 419void * 420devclass_get_softc(devclass_t dc, int unit) 421{ 422 device_t dev; 423 424 if (unit < 0 || unit >= dc->maxunit) 425 return NULL; 426 dev = dc->devices[unit]; 427 if (!dev || dev->state < DS_ATTACHED) 428 return NULL; 429 return dev->softc; 430} 431 432int 433devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 434{ 435 int i; 436 int count; 437 device_t *list; 438 439 count = 0; 440 for (i = 0; i < dc->maxunit; i++) 441 if (dc->devices[i]) 442 count++; 443 444 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 445 if (!list) 446 return ENOMEM; 447 bzero(list, count * sizeof(device_t)); 448 449 count = 0; 450 for (i = 0; i < dc->maxunit; i++) 451 if (dc->devices[i]) { 452 list[count] = dc->devices[i]; 453 count++; 454 } 455 456 *devlistp = list; 457 *devcountp = count; 458 459 return 0; 460} 461 462int 463devclass_get_maxunit(devclass_t dc) 464{ 465 return dc->maxunit; 466} 467 468static int 469devclass_alloc_unit(devclass_t dc, int *unitp) 470{ 471 int unit = *unitp; 472 473 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 474 475 /* 476 * If we have been given a wired unit number, check for existing 477 * device. 478 */ 479 if (unit != -1) { 480 device_t dev; 481 dev = devclass_get_device(dc, unit); 482 if (dev) { 483 printf("devclass_alloc_unit: %s%d already exists, using next available unit number\n", dc->name, unit); 484 unit = -1; 485 } 486 } 487 488 if (unit == -1) { 489 unit = dc->nextunit; 490 dc->nextunit++; 491 } else if (dc->nextunit <= unit) 492 dc->nextunit = unit + 1; 493 494 if (unit >= dc->maxunit) { 495 device_t *newlist; 496 int newsize; 497 498 newsize = (dc->maxunit ? 2 * dc->maxunit 499 : MINALLOCSIZE / sizeof(device_t)); 500 newlist = malloc(sizeof(device_t) * newsize, M_DEVBUF, M_NOWAIT); 501 if (!newlist) 502 return ENOMEM; 503 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 504 bzero(newlist + dc->maxunit, 505 sizeof(device_t) * (newsize - dc->maxunit)); 506 if (dc->devices) 507 free(dc->devices, M_DEVBUF); 508 dc->devices = newlist; 509 dc->maxunit = newsize; 510 } 511 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 512 513 *unitp = unit; 514 return 0; 515} 516 517static int 518devclass_add_device(devclass_t dc, device_t dev) 519{ 520 int buflen, error; 521 522 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 523 524 buflen = strlen(dc->name) + 5; 525 dev->nameunit = malloc(buflen, M_DEVBUF, M_NOWAIT); 526 if (!dev->nameunit) 527 return ENOMEM; 528 bzero(dev->nameunit, buflen); 529 530 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 531 free(dev->nameunit, M_DEVBUF); 532 dev->nameunit = NULL; 533 return error; 534 } 535 dc->devices[dev->unit] = dev; 536 dev->devclass = dc; 537 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 538 539#ifdef DEVICE_SYSCTLS 540 device_register_oids(dev); 541#endif 542 543 return 0; 544} 545 546static int 547devclass_delete_device(devclass_t dc, device_t dev) 548{ 549 if (!dc || !dev) 550 return 0; 551 552 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 553 554 if (dev->devclass != dc 555 || dc->devices[dev->unit] != dev) 556 panic("devclass_delete_device: inconsistent device class"); 557 dc->devices[dev->unit] = NULL; 558 if (dev->flags & DF_WILDCARD) 559 dev->unit = -1; 560 dev->devclass = NULL; 561 free(dev->nameunit, M_DEVBUF); 562 dev->nameunit = NULL; 563 while (dc->nextunit > 0 && dc->devices[dc->nextunit - 1] == NULL) 564 dc->nextunit--; 565 566#ifdef DEVICE_SYSCTLS 567 device_unregister_oids(dev); 568#endif 569 570 return 0; 571} 572 573static device_t 574make_device(device_t parent, const char *name, 575 int unit, void *ivars) 576{ 577 device_t dev; 578 devclass_t dc; 579 580 PDEBUG(("%s at %s as unit %d with%s ivars", 581 name, DEVICENAME(parent), unit, (ivars? "":"out"))); 582 583 if (name) { 584 dc = devclass_find_internal(name, TRUE); 585 if (!dc) { 586 printf("make_device: can't find device class %s\n", name); 587 return NULL; 588 } 589 } else 590 dc = NULL; 591 592 dev = malloc(sizeof(struct device), M_DEVBUF, M_NOWAIT); 593 if (!dev) 594 return 0; 595 bzero(dev, sizeof(struct device)); 596 597 dev->parent = parent; 598 TAILQ_INIT(&dev->children); 599 dev->ops = &null_ops; 600 dev->driver = NULL; 601 dev->devclass = NULL; 602 dev->unit = unit; 603 dev->nameunit = NULL; 604 dev->desc = NULL; 605 dev->busy = 0; 606 dev->flags = DF_ENABLED; 607 if (unit == -1) 608 dev->flags |= DF_WILDCARD; 609 if (name) { 610 dev->flags |= DF_FIXEDCLASS; 611 devclass_add_device(dc, dev); 612 } 613 dev->ivars = ivars; 614 dev->softc = NULL; 615 616 dev->state = DS_NOTPRESENT; 617 618 return dev; 619} 620 621static void 622device_print_child(device_t dev, device_t child) 623{ 624 printf("%s%d", device_get_name(child), device_get_unit(child)); 625 if (device_is_alive(child)) { 626 if (device_get_desc(child)) 627 printf(": <%s>", device_get_desc(child)); 628 BUS_PRINT_CHILD(dev, child); 629 } else 630 printf(" not found"); 631 printf("\n"); 632} 633 634device_t 635device_add_child(device_t dev, const char *name, int unit, void *ivars) 636{ 637 device_t child; 638 639 PDEBUG(("%s at %s as unit %d with%s ivars", 640 name, DEVICENAME(dev), unit, (ivars? "":"out"))); 641 642 child = make_device(dev, name, unit, ivars); 643 644 if (child) 645 TAILQ_INSERT_TAIL(&dev->children, child, link); 646 else 647 PDEBUG(("%s failed", name)); 648 649 return child; 650} 651 652device_t 653device_add_child_after(device_t dev, device_t place, const char *name, 654 int unit, void *ivars) 655{ 656 device_t child; 657 658 PDEBUG(("%s at %s after %s as unit %d with%s ivars", 659 name, DEVICENAME(dev), DEVICENAME(place), unit, (ivars? "":"out"))); 660 661 child = make_device(dev, name, unit, ivars); 662 if (child == NULL) 663 return child; 664 665 if (place) { 666 TAILQ_INSERT_AFTER(&dev->children, place, child, link); 667 } else { 668 TAILQ_INSERT_HEAD(&dev->children, child, link); 669 } 670 671 return child; 672} 673 674int 675device_delete_child(device_t dev, device_t child) 676{ 677 int error; 678 device_t grandchild; 679 680 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 681 682 /* remove children first */ 683 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 684 error = device_delete_child(child, grandchild); 685 if (error) 686 return error; 687 } 688 689 if ((error = device_detach(child)) != 0) 690 return error; 691 if (child->devclass) 692 devclass_delete_device(child->devclass, child); 693 TAILQ_REMOVE(&dev->children, child, link); 694 device_set_desc(child, NULL); 695 free(child, M_DEVBUF); 696 697 return 0; 698} 699 700/* 701 * Find only devices attached to this bus. 702 */ 703device_t 704device_find_child(device_t dev, const char *classname, int unit) 705{ 706 devclass_t dc; 707 device_t child; 708 709 dc = devclass_find(classname); 710 if (!dc) 711 return NULL; 712 713 child = devclass_get_device(dc, unit); 714 if (child && child->parent == dev) 715 return child; 716 return NULL; 717} 718 719static driverlink_t 720first_matching_driver(devclass_t dc, device_t dev) 721{ 722 if (dev->devclass) 723 return devclass_find_driver_internal(dc, dev->devclass->name); 724 else 725 return TAILQ_FIRST(&dc->drivers); 726} 727 728static driverlink_t 729next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 730{ 731 if (dev->devclass) { 732 driverlink_t dl; 733 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 734 if (!strcmp(dev->devclass->name, dl->driver->name)) 735 return dl; 736 return NULL; 737 } else 738 return TAILQ_NEXT(last, link); 739} 740 741static int 742device_probe_child(device_t dev, device_t child) 743{ 744 devclass_t dc; 745 driverlink_t best = 0; 746 driverlink_t dl; 747 int result, pri = 0; 748 749 dc = dev->devclass; 750 if (dc == NULL) 751 panic("device_probe_child: parent device has no devclass"); 752 753 if (child->state == DS_ALIVE) 754 return 0; 755 756 for (dl = first_matching_driver(dc, child); 757 dl; 758 dl = next_matching_driver(dc, child, dl)) { 759 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 760 device_set_driver(child, dl->driver); 761 result = DEVICE_PROBE(child); 762 763 /* 764 * If the driver returns SUCCESS, there can be no higher match 765 * for this device. 766 */ 767 if (result == 0) { 768 best = dl; 769 pri = 0; 770 break; 771 } 772 773 /* 774 * The driver returned an error so it certainly doesn't match. 775 */ 776 if (result > 0) 777 continue; 778 779 /* 780 * A priority lower than SUCCESS, remember the best matching 781 * driver. Initialise the value of pri for the first match. 782 */ 783 if (best == 0 || result > pri) { 784 best = dl; 785 pri = result; 786 continue; 787 } 788 } 789 790 /* 791 * If we found a driver, change state and initialise the devclass. 792 */ 793 if (best) { 794 if (!child->devclass) 795 device_set_devclass(child, best->driver->name); 796 device_set_driver(child, best->driver); 797 if (pri < 0) { 798 /* 799 * A bit bogus. Call the probe method again to make sure 800 * that we have the right description. 801 */ 802 DEVICE_PROBE(child); 803 } 804 child->state = DS_ALIVE; 805 return 0; 806 } 807 808 return ENXIO; 809} 810 811device_t 812device_get_parent(device_t dev) 813{ 814 return dev->parent; 815} 816 817int 818device_get_children(device_t dev, device_t **devlistp, int *devcountp) 819{ 820 int count; 821 device_t child; 822 device_t *list; 823 824 count = 0; 825 for (child = TAILQ_FIRST(&dev->children); child; 826 child = TAILQ_NEXT(child, link)) 827 count++; 828 829 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 830 if (!list) 831 return ENOMEM; 832 bzero(list, count * sizeof(device_t)); 833 834 count = 0; 835 for (child = TAILQ_FIRST(&dev->children); child; 836 child = TAILQ_NEXT(child, link)) { 837 list[count] = child; 838 count++; 839 } 840 841 *devlistp = list; 842 *devcountp = count; 843 844 return 0; 845} 846 847driver_t * 848device_get_driver(device_t dev) 849{ 850 return dev->driver; 851} 852 853devclass_t 854device_get_devclass(device_t dev) 855{ 856 return dev->devclass; 857} 858 859const char * 860device_get_name(device_t dev) 861{ 862 if (dev->devclass) 863 return devclass_get_name(dev->devclass); 864 return NULL; 865} 866 867const char * 868device_get_nameunit(device_t dev) 869{ 870 return dev->nameunit; 871} 872 873int 874device_get_unit(device_t dev) 875{ 876 return dev->unit; 877} 878 879const char * 880device_get_desc(device_t dev) 881{ 882 return dev->desc; 883} 884 885void 886device_print_prettyname(device_t dev) 887{ 888 const char *name = device_get_name(dev); 889 890 if (name == 0) 891 name = "(no driver assigned)"; 892 printf("%s%d: ", name, device_get_unit(dev)); 893} 894 895void 896device_printf(device_t dev, const char * fmt, ...) 897{ 898 va_list ap; 899 900 device_print_prettyname(dev); 901 va_start(ap, fmt); 902 vprintf(fmt, ap); 903 va_end(ap); 904} 905 906static void 907device_set_desc_internal(device_t dev, const char* desc, int copy) 908{ 909 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 910 free(dev->desc, M_DEVBUF); 911 dev->flags &= ~DF_DESCMALLOCED; 912 dev->desc = NULL; 913 } 914 915 if (copy && desc) { 916 dev->desc = malloc(strlen(desc) + 1, M_DEVBUF, M_NOWAIT); 917 if (dev->desc) { 918 strcpy(dev->desc, desc); 919 dev->flags |= DF_DESCMALLOCED; 920 } 921 } else 922 /* Avoid a -Wcast-qual warning */ 923 dev->desc = (char *)(uintptr_t) desc; 924 925#ifdef DEVICE_SYSCTLS 926 { 927 struct sysctl_oid *oid = &dev->oid[1]; 928 oid->oid_arg1 = dev->desc ? dev->desc : ""; 929 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 930 } 931#endif 932} 933 934void 935device_set_desc(device_t dev, const char* desc) 936{ 937 device_set_desc_internal(dev, desc, FALSE); 938} 939 940void 941device_set_desc_copy(device_t dev, const char* desc) 942{ 943 device_set_desc_internal(dev, desc, TRUE); 944} 945 946void * 947device_get_softc(device_t dev) 948{ 949 return dev->softc; 950} 951 952void * 953device_get_ivars(device_t dev) 954{ 955 return dev->ivars; 956} 957 958device_state_t 959device_get_state(device_t dev) 960{ 961 return dev->state; 962} 963 964void 965device_enable(device_t dev) 966{ 967 dev->flags |= DF_ENABLED; 968} 969 970void 971device_disable(device_t dev) 972{ 973 dev->flags &= ~DF_ENABLED; 974} 975 976void 977device_busy(device_t dev) 978{ 979 if (dev->state < DS_ATTACHED) 980 panic("device_busy: called for unattached device"); 981 if (dev->busy == 0 && dev->parent) 982 device_busy(dev->parent); 983 dev->busy++; 984 dev->state = DS_BUSY; 985} 986 987void 988device_unbusy(device_t dev) 989{ 990 if (dev->state != DS_BUSY) 991 panic("device_unbusy: called for non-busy device"); 992 dev->busy--; 993 if (dev->busy == 0) { 994 if (dev->parent) 995 device_unbusy(dev->parent); 996 dev->state = DS_ATTACHED; 997 } 998} 999 1000void 1001device_quiet(device_t dev) 1002{ 1003 dev->flags |= DF_QUIET; 1004} 1005 1006void 1007device_verbose(device_t dev) 1008{ 1009 dev->flags &= ~DF_QUIET; 1010} 1011 1012int 1013device_is_quiet(device_t dev) 1014{ 1015 return (dev->flags & DF_QUIET) != 0; 1016} 1017 1018int 1019device_is_enabled(device_t dev) 1020{ 1021 return (dev->flags & DF_ENABLED) != 0; 1022} 1023 1024int 1025device_is_alive(device_t dev) 1026{ 1027 return dev->state >= DS_ALIVE; 1028} 1029 1030int 1031device_set_devclass(device_t dev, const char *classname) 1032{ 1033 devclass_t dc; 1034 1035 if (dev->devclass) { 1036 printf("device_set_devclass: device class already set\n"); 1037 return EINVAL; 1038 } 1039 1040 dc = devclass_find_internal(classname, TRUE); 1041 if (!dc) 1042 return ENOMEM; 1043 1044 return devclass_add_device(dc, dev); 1045} 1046 1047int 1048device_set_driver(device_t dev, driver_t *driver) 1049{ 1050 if (dev->state >= DS_ATTACHED) 1051 return EBUSY; 1052 1053 if (dev->driver == driver) 1054 return 0; 1055 1056 if (dev->softc) { 1057 free(dev->softc, M_DEVBUF); 1058 dev->softc = NULL; 1059 } 1060 dev->ops = &null_ops; 1061 dev->driver = driver; 1062 if (driver) { 1063 dev->ops = driver->ops; 1064 dev->softc = malloc(driver->softc, M_DEVBUF, M_NOWAIT); 1065 if (!dev->softc) { 1066 dev->ops = &null_ops; 1067 dev->driver = NULL; 1068 return ENOMEM; 1069 } 1070 bzero(dev->softc, driver->softc); 1071 } 1072 return 0; 1073} 1074 1075int 1076device_probe_and_attach(device_t dev) 1077{ 1078 device_t bus = dev->parent; 1079 int error = 0; 1080 1081 if (dev->state >= DS_ALIVE) 1082 return 0; 1083 1084 if (dev->flags & DF_ENABLED) { 1085 error = device_probe_child(bus, dev); 1086 if (!error) { 1087 if (!device_is_quiet(dev)) 1088 device_print_child(bus, dev); 1089 error = DEVICE_ATTACH(dev); 1090 if (!error) 1091 dev->state = DS_ATTACHED; 1092 else { 1093 printf("device_probe_and_attach: %s%d attach returned %d\n", 1094 dev->driver->name, dev->unit, error); 1095 device_set_driver(dev, NULL); 1096 dev->state = DS_NOTPRESENT; 1097 } 1098 } 1099 } else { 1100 device_print_prettyname(dev); 1101 printf("not probed (disabled)\n"); 1102 } 1103 1104 return error; 1105} 1106 1107int 1108device_detach(device_t dev) 1109{ 1110 int error; 1111 1112 PDEBUG(("%s", DEVICENAME(dev))); 1113 if (dev->state == DS_BUSY) 1114 return EBUSY; 1115 if (dev->state != DS_ATTACHED) 1116 return 0; 1117 1118 if ((error = DEVICE_DETACH(dev)) != 0) 1119 return error; 1120 if (dev->parent) 1121 BUS_CHILD_DETACHED(dev->parent, dev); 1122 1123 if (!(dev->flags & DF_FIXEDCLASS)) 1124 devclass_delete_device(dev->devclass, dev); 1125 1126 dev->state = DS_NOTPRESENT; 1127 device_set_driver(dev, NULL); 1128 1129 return 0; 1130} 1131 1132int 1133device_shutdown(device_t dev) 1134{ 1135 if (dev->state < DS_ATTACHED) 1136 return 0; 1137 return DEVICE_SHUTDOWN(dev); 1138} 1139 1140#ifdef DEVICE_SYSCTLS 1141 1142/* 1143 * Sysctl nodes for devices. 1144 */ 1145 1146SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1147 1148static int 1149sysctl_handle_children SYSCTL_HANDLER_ARGS 1150{ 1151 device_t dev = arg1; 1152 device_t child; 1153 int first = 1, error = 0; 1154 1155 for (child = TAILQ_FIRST(&dev->children); child; 1156 child = TAILQ_NEXT(child, link)) { 1157 if (child->nameunit) { 1158 if (!first) { 1159 error = SYSCTL_OUT(req, ",", 1); 1160 if (error) return error; 1161 } else { 1162 first = 0; 1163 } 1164 error = SYSCTL_OUT(req, child->nameunit, strlen(child->nameunit)); 1165 if (error) return error; 1166 } 1167 } 1168 1169 error = SYSCTL_OUT(req, "", 1); 1170 1171 return error; 1172} 1173 1174static int 1175sysctl_handle_state SYSCTL_HANDLER_ARGS 1176{ 1177 device_t dev = arg1; 1178 1179 switch (dev->state) { 1180 case DS_NOTPRESENT: 1181 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1182 case DS_ALIVE: 1183 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1184 case DS_ATTACHED: 1185 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1186 case DS_BUSY: 1187 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1188 } 1189 1190 return 0; 1191} 1192 1193static void 1194device_register_oids(device_t dev) 1195{ 1196 struct sysctl_oid* oid; 1197 1198 oid = &dev->oid[0]; 1199 bzero(oid, sizeof(*oid)); 1200 oid->oid_parent = &sysctl__hw_devices_children; 1201 oid->oid_number = OID_AUTO; 1202 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1203 oid->oid_arg1 = &dev->oidlist[0]; 1204 oid->oid_arg2 = 0; 1205 oid->oid_name = dev->nameunit; 1206 oid->oid_handler = 0; 1207 oid->oid_fmt = "N"; 1208 SLIST_INIT(&dev->oidlist[0]); 1209 sysctl_register_oid(oid); 1210 1211 oid = &dev->oid[1]; 1212 bzero(oid, sizeof(*oid)); 1213 oid->oid_parent = &dev->oidlist[0]; 1214 oid->oid_number = OID_AUTO; 1215 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1216 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1217 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1218 oid->oid_name = "desc"; 1219 oid->oid_handler = sysctl_handle_string; 1220 oid->oid_fmt = "A"; 1221 sysctl_register_oid(oid); 1222 1223 oid = &dev->oid[2]; 1224 bzero(oid, sizeof(*oid)); 1225 oid->oid_parent = &dev->oidlist[0]; 1226 oid->oid_number = OID_AUTO; 1227 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1228 oid->oid_arg1 = dev; 1229 oid->oid_arg2 = 0; 1230 oid->oid_name = "children"; 1231 oid->oid_handler = sysctl_handle_children; 1232 oid->oid_fmt = "A"; 1233 sysctl_register_oid(oid); 1234 1235 oid = &dev->oid[3]; 1236 bzero(oid, sizeof(*oid)); 1237 oid->oid_parent = &dev->oidlist[0]; 1238 oid->oid_number = OID_AUTO; 1239 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1240 oid->oid_arg1 = dev; 1241 oid->oid_arg2 = 0; 1242 oid->oid_name = "state"; 1243 oid->oid_handler = sysctl_handle_state; 1244 oid->oid_fmt = "A"; 1245 sysctl_register_oid(oid); 1246} 1247 1248static void 1249device_unregister_oids(device_t dev) 1250{ 1251 sysctl_unregister_oid(&dev->oid[0]); 1252 sysctl_unregister_oid(&dev->oid[1]); 1253 sysctl_unregister_oid(&dev->oid[2]); 1254} 1255 1256#endif 1257 1258/*======================================*/ 1259/* 1260 * Access functions for device resources. 1261 */ 1262 1263/* Supplied by config(8) in ioconf.c */ 1264extern struct config_device config_devtab[]; 1265extern int devtab_count; 1266 1267/* Runtime version */ 1268struct config_device *devtab = config_devtab; 1269 1270static int 1271resource_new_name(char *name, int unit) 1272{ 1273 struct config_device *new; 1274 1275 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1276 if (new == NULL) 1277 return -1; 1278 if (devtab && devtab_count > 0) 1279 bcopy(devtab, new, devtab_count * sizeof(*new)); 1280 bzero(&new[devtab_count], sizeof(*new)); 1281 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_NOWAIT); 1282 if (new[devtab_count].name == NULL) { 1283 free(new, M_TEMP); 1284 return -1; 1285 } 1286 strcpy(new[devtab_count].name, name); 1287 new[devtab_count].unit = unit; 1288 new[devtab_count].resource_count = 0; 1289 new[devtab_count].resources = NULL; 1290 devtab = new; 1291 return devtab_count++; 1292} 1293 1294static int 1295resource_new_resname(int j, char *resname, resource_type type) 1296{ 1297 struct config_resource *new; 1298 int i; 1299 1300 i = devtab[j].resource_count; 1301 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1302 if (new == NULL) 1303 return -1; 1304 if (devtab[j].resources && i > 0) 1305 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1306 bzero(&new[i], sizeof(*new)); 1307 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_NOWAIT); 1308 if (new[i].name == NULL) { 1309 free(new, M_TEMP); 1310 return -1; 1311 } 1312 strcpy(new[i].name, resname); 1313 new[i].type = type; 1314 if (devtab[j].resources) 1315 free(devtab[j].resources, M_TEMP); 1316 devtab[j].resources = new; 1317 devtab[j].resource_count = i + 1; 1318 return i; 1319} 1320 1321static int 1322resource_match_string(int i, char *resname, char *value) 1323{ 1324 int j; 1325 struct config_resource *res; 1326 1327 for (j = 0, res = devtab[i].resources; 1328 j < devtab[i].resource_count; j++, res++) 1329 if (!strcmp(res->name, resname) 1330 && res->type == RES_STRING 1331 && !strcmp(res->u.stringval, value)) 1332 return j; 1333 return -1; 1334} 1335 1336static int 1337resource_find(const char *name, int unit, char *resname, 1338 struct config_resource **result) 1339{ 1340 int i, j; 1341 struct config_resource *res; 1342 1343 /* 1344 * First check specific instances, then generic. 1345 */ 1346 for (i = 0; i < devtab_count; i++) { 1347 if (devtab[i].unit < 0) 1348 continue; 1349 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1350 res = devtab[i].resources; 1351 for (j = 0; j < devtab[i].resource_count; j++, res++) 1352 if (!strcmp(res->name, resname)) { 1353 *result = res; 1354 return 0; 1355 } 1356 } 1357 } 1358 for (i = 0; i < devtab_count; i++) { 1359 if (devtab[i].unit >= 0) 1360 continue; 1361 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1362 /* XXX if so, then the generic match does nothing */ 1363 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1364 res = devtab[i].resources; 1365 for (j = 0; j < devtab[i].resource_count; j++, res++) 1366 if (!strcmp(res->name, resname)) { 1367 *result = res; 1368 return 0; 1369 } 1370 } 1371 } 1372 return ENOENT; 1373} 1374 1375int 1376resource_int_value(const char *name, int unit, char *resname, int *result) 1377{ 1378 int error; 1379 struct config_resource *res; 1380 1381 if ((error = resource_find(name, unit, resname, &res)) != 0) 1382 return error; 1383 if (res->type != RES_INT) 1384 return EFTYPE; 1385 *result = res->u.intval; 1386 return 0; 1387} 1388 1389int 1390resource_long_value(const char *name, int unit, char *resname, long *result) 1391{ 1392 int error; 1393 struct config_resource *res; 1394 1395 if ((error = resource_find(name, unit, resname, &res)) != 0) 1396 return error; 1397 if (res->type != RES_LONG) 1398 return EFTYPE; 1399 *result = res->u.longval; 1400 return 0; 1401} 1402 1403int 1404resource_string_value(const char *name, int unit, char *resname, char **result) 1405{ 1406 int error; 1407 struct config_resource *res; 1408 1409 if ((error = resource_find(name, unit, resname, &res)) != 0) 1410 return error; 1411 if (res->type != RES_STRING) 1412 return EFTYPE; 1413 *result = res->u.stringval; 1414 return 0; 1415} 1416 1417int 1418resource_query_string(int i, char *resname, char *value) 1419{ 1420 if (i < 0) 1421 i = 0; 1422 else 1423 i = i + 1; 1424 for (; i < devtab_count; i++) 1425 if (resource_match_string(i, resname, value) >= 0) 1426 return i; 1427 return -1; 1428} 1429 1430int 1431resource_locate(int i, char *resname) 1432{ 1433 if (i < 0) 1434 i = 0; 1435 else 1436 i = i + 1; 1437 for (; i < devtab_count; i++) 1438 if (!strcmp(devtab[i].name, resname)) 1439 return i; 1440 return -1; 1441} 1442 1443int 1444resource_count(void) 1445{ 1446 return devtab_count; 1447} 1448 1449char * 1450resource_query_name(int i) 1451{ 1452 return devtab[i].name; 1453} 1454 1455int 1456resource_query_unit(int i) 1457{ 1458 return devtab[i].unit; 1459} 1460 1461static int 1462resource_create(char *name, int unit, char *resname, resource_type type, 1463 struct config_resource **result) 1464{ 1465 int i, j; 1466 struct config_resource *res = NULL; 1467 1468 for (i = 0; i < devtab_count; i++) { 1469 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1470 res = devtab[i].resources; 1471 break; 1472 } 1473 } 1474 if (res == NULL) { 1475 i = resource_new_name(name, unit); 1476 if (i < 0) 1477 return ENOMEM; 1478 res = devtab[i].resources; 1479 } 1480 for (j = 0; j < devtab[i].resource_count; j++, res++) { 1481 if (!strcmp(res->name, resname)) { 1482 *result = res; 1483 return 0; 1484 } 1485 } 1486 j = resource_new_resname(i, resname, type); 1487 if (j < 0) 1488 return ENOMEM; 1489 res = &devtab[i].resources[j]; 1490 *result = res; 1491 return 0; 1492} 1493 1494int 1495resource_set_int(char *name, int unit, char *resname, int value) 1496{ 1497 int error; 1498 struct config_resource *res; 1499 1500 error = resource_create(name, unit, resname, RES_INT, &res); 1501 if (error) 1502 return error; 1503 if (res->type != RES_INT) 1504 return EFTYPE; 1505 res->u.intval = value; 1506 return 0; 1507} 1508 1509int 1510resource_set_long(char *name, int unit, char *resname, long value) 1511{ 1512 int error; 1513 struct config_resource *res; 1514 1515 error = resource_create(name, unit, resname, RES_LONG, &res); 1516 if (error) 1517 return error; 1518 if (res->type != RES_LONG) 1519 return EFTYPE; 1520 res->u.longval = value; 1521 return 0; 1522} 1523 1524int 1525resource_set_string(char *name, int unit, char *resname, char *value) 1526{ 1527 int error; 1528 struct config_resource *res; 1529 1530 error = resource_create(name, unit, resname, RES_STRING, &res); 1531 if (error) 1532 return error; 1533 if (res->type != RES_STRING) 1534 return EFTYPE; 1535 if (res->u.stringval) 1536 free(res->u.stringval, M_TEMP); 1537 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_NOWAIT); 1538 if (res->u.stringval == NULL) 1539 return ENOMEM; 1540 strcpy(res->u.stringval, value); 1541 return 0; 1542} 1543 1544 1545static void 1546resource_cfgload(void *dummy __unused) 1547{ 1548 struct config_resource *res, *cfgres; 1549 int i, j; 1550 int error; 1551 char *name, *resname; 1552 int unit; 1553 resource_type type; 1554 char *stringval; 1555 int config_devtab_count; 1556 1557 config_devtab_count = devtab_count; 1558 devtab = NULL; 1559 devtab_count = 0; 1560 1561 for (i = 0; i < config_devtab_count; i++) { 1562 name = config_devtab[i].name; 1563 unit = config_devtab[i].unit; 1564 1565 for (j = 0; j < config_devtab[i].resource_count; j++) { 1566 cfgres = config_devtab[i].resources; 1567 resname = cfgres[j].name; 1568 type = cfgres[j].type; 1569 error = resource_create(name, unit, resname, type, 1570 &res); 1571 if (error) { 1572 printf("create resource %s%d: error %d\n", 1573 name, unit, error); 1574 continue; 1575 } 1576 if (res->type != type) { 1577 printf("type mismatch %s%d: %d != %d\n", 1578 name, unit, res->type, type); 1579 continue; 1580 } 1581 switch (type) { 1582 case RES_INT: 1583 res->u.intval = cfgres[j].u.intval; 1584 break; 1585 case RES_LONG: 1586 res->u.longval = cfgres[j].u.longval; 1587 break; 1588 case RES_STRING: 1589 if (res->u.stringval) 1590 free(res->u.stringval, M_TEMP); 1591 stringval = cfgres[j].u.stringval; 1592 res->u.stringval = malloc(strlen(stringval) + 1, 1593 M_TEMP, M_NOWAIT); 1594 if (res->u.stringval == NULL) 1595 break; 1596 strcpy(res->u.stringval, stringval); 1597 break; 1598 default: 1599 panic("unknown resource type %d\n", type); 1600 } 1601 } 1602 } 1603} 1604SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1605 1606 1607/*======================================*/ 1608/* 1609 * Some useful method implementations to make life easier for bus drivers. 1610 */ 1611 1612void 1613resource_list_init(struct resource_list *rl) 1614{ 1615 SLIST_INIT(rl); 1616} 1617 1618void 1619resource_list_free(struct resource_list *rl) 1620{ 1621 struct resource_list_entry *rle; 1622 1623 while ((rle = SLIST_FIRST(rl)) != NULL) { 1624 if (rle->res) 1625 panic("resource_list_free: resource entry is busy"); 1626 SLIST_REMOVE_HEAD(rl, link); 1627 free(rle, M_DEVBUF); 1628 } 1629} 1630 1631void 1632resource_list_add(struct resource_list *rl, 1633 int type, int rid, 1634 u_long start, u_long end, u_long count) 1635{ 1636 struct resource_list_entry *rle; 1637 1638 rle = resource_list_find(rl, type, rid); 1639 if (!rle) { 1640 rle = malloc(sizeof(struct resource_list_entry), M_DEVBUF, M_NOWAIT); 1641 if (!rle) 1642 panic("resource_list_add: can't record entry"); 1643 SLIST_INSERT_HEAD(rl, rle, link); 1644 rle->type = type; 1645 rle->rid = rid; 1646 rle->res = NULL; 1647 } 1648 1649 if (rle->res) 1650 panic("resource_list_add: resource entry is busy"); 1651 1652 rle->start = start; 1653 rle->end = end; 1654 rle->count = count; 1655} 1656 1657struct resource_list_entry* 1658resource_list_find(struct resource_list *rl, 1659 int type, int rid) 1660{ 1661 struct resource_list_entry *rle; 1662 1663 SLIST_FOREACH(rle, rl, link) 1664 if (rle->type == type && rle->rid == rid) 1665 return rle; 1666 return NULL; 1667} 1668 1669void 1670resource_list_remove(struct resource_list *rl, 1671 int type, int rid) 1672{ 1673 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1674 1675 if (rle) { 1676 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1677 free(rle, M_DEVBUF); 1678 } 1679} 1680 1681struct resource * 1682resource_list_alloc(device_t bus, device_t child, 1683 int type, int *rid, 1684 u_long start, u_long end, 1685 u_long count, u_int flags) 1686{ 1687 struct resource_list *rl; 1688 struct resource_list_entry *rle = 0; 1689 int passthrough = (device_get_parent(child) != bus); 1690 int isdefault = (start == 0UL && end == ~0UL); 1691 1692 if (passthrough) { 1693 return BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1694 type, rid, 1695 start, end, count, flags); 1696 } 1697 1698 rl = device_get_ivars(child); 1699 rle = resource_list_find(rl, type, *rid); 1700 1701 if (!rle) 1702 return 0; /* no resource of that type/rid */ 1703 if (rle->res) 1704 panic("resource_list_alloc: resource entry is busy"); 1705 1706 if (isdefault) { 1707 start = rle->start; 1708 count = max(count, rle->count); 1709 end = max(rle->end, start + count - 1); 1710 } 1711 1712 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1713 type, rid, start, end, count, flags); 1714 1715 /* 1716 * Record the new range. 1717 */ 1718 if (rle->res) { 1719 rle->start = rman_get_start(rle->res); 1720 rle->end = rman_get_end(rle->res); 1721 rle->count = count; 1722 } 1723 1724 return rle->res; 1725} 1726 1727int 1728resource_list_release(device_t bus, device_t child, 1729 int type, int rid, struct resource *res) 1730{ 1731 struct resource_list *rl; 1732 struct resource_list_entry *rle = 0; 1733 int passthrough = (device_get_parent(child) != bus); 1734 int error; 1735 1736 if (passthrough) { 1737 return BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1738 type, rid, res); 1739 } 1740 1741 rl = device_get_ivars(child); 1742 rle = resource_list_find(rl, type, rid); 1743 1744 if (!rle) 1745 panic("resource_list_release: can't find resource"); 1746 if (!rle->res) 1747 panic("resource_list_release: resource entry is not busy"); 1748 1749 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1750 type, rid, res); 1751 if (error) 1752 return error; 1753 1754 rle->res = NULL; 1755 return 0; 1756} 1757 1758/* 1759 * Call DEVICE_IDENTIFY for each driver. 1760 */ 1761int 1762bus_generic_probe(device_t dev) 1763{ 1764 devclass_t dc = dev->devclass; 1765 driverlink_t dl; 1766 1767 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) 1768 DEVICE_IDENTIFY(dl->driver, dev); 1769 1770 return 0; 1771} 1772 1773int 1774bus_generic_attach(device_t dev) 1775{ 1776 device_t child; 1777 1778 for (child = TAILQ_FIRST(&dev->children); 1779 child; child = TAILQ_NEXT(child, link)) 1780 device_probe_and_attach(child); 1781 1782 return 0; 1783} 1784 1785int 1786bus_generic_detach(device_t dev) 1787{ 1788 device_t child; 1789 int error; 1790 1791 if (dev->state != DS_ATTACHED) 1792 return EBUSY; 1793 1794 for (child = TAILQ_FIRST(&dev->children); 1795 child; child = TAILQ_NEXT(child, link)) 1796 if ((error = device_detach(child)) != 0) 1797 return error; 1798 1799 return 0; 1800} 1801 1802int 1803bus_generic_shutdown(device_t dev) 1804{ 1805 device_t child; 1806 1807 for (child = TAILQ_FIRST(&dev->children); 1808 child; child = TAILQ_NEXT(child, link)) 1809 device_shutdown(child); 1810 1811 return 0; 1812} 1813 1814int 1815bus_generic_suspend(device_t dev) 1816{ 1817 int error; 1818 device_t child, child2; 1819 1820 for (child = TAILQ_FIRST(&dev->children); 1821 child; child = TAILQ_NEXT(child, link)) { 1822 error = DEVICE_SUSPEND(child); 1823 if (error) { 1824 for (child2 = TAILQ_FIRST(&dev->children); 1825 child2 && child2 != child; 1826 child2 = TAILQ_NEXT(child2, link)) 1827 DEVICE_RESUME(child2); 1828 return (error); 1829 } 1830 } 1831 return 0; 1832} 1833 1834int 1835bus_generic_resume(device_t dev) 1836{ 1837 device_t child; 1838 1839 for (child = TAILQ_FIRST(&dev->children); 1840 child; child = TAILQ_NEXT(child, link)) { 1841 DEVICE_RESUME(child); 1842 /* if resume fails, there's nothing we can usefully do... */ 1843 } 1844 return 0; 1845} 1846 1847void 1848bus_generic_print_child(device_t dev, device_t child) 1849{ 1850 printf(" on %s%d", device_get_name(dev), device_get_unit(dev)); 1851} 1852 1853int 1854bus_generic_read_ivar(device_t dev, device_t child, int index, 1855 uintptr_t * result) 1856{ 1857 return ENOENT; 1858} 1859 1860int 1861bus_generic_write_ivar(device_t dev, device_t child, int index, 1862 uintptr_t value) 1863{ 1864 return ENOENT; 1865} 1866 1867void 1868bus_generic_driver_added(device_t dev, driver_t *driver) 1869{ 1870 device_t child; 1871 1872 for (child = TAILQ_FIRST(&dev->children); 1873 child; child = TAILQ_NEXT(child, link)) 1874 if (child->state == DS_NOTPRESENT) 1875 device_probe_and_attach(child); 1876} 1877 1878int 1879bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1880 int flags, driver_intr_t *intr, void *arg, 1881 void **cookiep) 1882{ 1883 /* Propagate up the bus hierarchy until someone handles it. */ 1884 if (dev->parent) 1885 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1886 intr, arg, cookiep)); 1887 else 1888 return (EINVAL); 1889} 1890 1891int 1892bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1893 void *cookie) 1894{ 1895 /* Propagate up the bus hierarchy until someone handles it. */ 1896 if (dev->parent) 1897 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1898 else 1899 return (EINVAL); 1900} 1901 1902struct resource * 1903bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1904 u_long start, u_long end, u_long count, u_int flags) 1905{ 1906 /* Propagate up the bus hierarchy until someone handles it. */ 1907 if (dev->parent) 1908 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1909 start, end, count, flags)); 1910 else 1911 return (NULL); 1912} 1913 1914int 1915bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1916 struct resource *r) 1917{ 1918 /* Propagate up the bus hierarchy until someone handles it. */ 1919 if (dev->parent) 1920 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1921 r)); 1922 else 1923 return (EINVAL); 1924} 1925 1926int 1927bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1928 struct resource *r) 1929{ 1930 /* Propagate up the bus hierarchy until someone handles it. */ 1931 if (dev->parent) 1932 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1933 r)); 1934 else 1935 return (EINVAL); 1936} 1937 1938int 1939bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1940 int rid, struct resource *r) 1941{ 1942 /* Propagate up the bus hierarchy until someone handles it. */ 1943 if (dev->parent) 1944 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1945 r)); 1946 else 1947 return (EINVAL); 1948} 1949 1950/* 1951 * Some convenience functions to make it easier for drivers to use the 1952 * resource-management functions. All these really do is hide the 1953 * indirection through the parent's method table, making for slightly 1954 * less-wordy code. In the future, it might make sense for this code 1955 * to maintain some sort of a list of resources allocated by each device. 1956 */ 1957struct resource * 1958bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 1959 u_long count, u_int flags) 1960{ 1961 if (dev->parent == 0) 1962 return (0); 1963 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 1964 count, flags)); 1965} 1966 1967int 1968bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 1969{ 1970 if (dev->parent == 0) 1971 return (EINVAL); 1972 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 1973} 1974 1975int 1976bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 1977{ 1978 if (dev->parent == 0) 1979 return (EINVAL); 1980 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 1981} 1982 1983int 1984bus_release_resource(device_t dev, int type, int rid, struct resource *r) 1985{ 1986 if (dev->parent == 0) 1987 return (EINVAL); 1988 return (BUS_RELEASE_RESOURCE(dev->parent, dev, 1989 type, rid, r)); 1990} 1991 1992int 1993bus_setup_intr(device_t dev, struct resource *r, int flags, 1994 driver_intr_t handler, void *arg, void **cookiep) 1995{ 1996 if (dev->parent == 0) 1997 return (EINVAL); 1998 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 1999 handler, arg, cookiep)); 2000} 2001 2002int 2003bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2004{ 2005 if (dev->parent == 0) 2006 return (EINVAL); 2007 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2008} 2009 2010static void 2011root_print_child(device_t dev, device_t child) 2012{ 2013} 2014 2015static int 2016root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2017 void **cookiep) 2018{ 2019 /* 2020 * If an interrupt mapping gets to here something bad has happened. 2021 */ 2022 panic("root_setup_intr"); 2023} 2024 2025static device_method_t root_methods[] = { 2026 /* Device interface */ 2027 DEVMETHOD(device_shutdown, bus_generic_shutdown), 2028 DEVMETHOD(device_suspend, bus_generic_suspend), 2029 DEVMETHOD(device_resume, bus_generic_resume), 2030 2031 /* Bus interface */ 2032 DEVMETHOD(bus_print_child, root_print_child), 2033 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 2034 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), 2035 DEVMETHOD(bus_setup_intr, root_setup_intr), 2036 2037 { 0, 0 } 2038}; 2039 2040static driver_t root_driver = { 2041 "root", 2042 root_methods, 2043 1, /* no softc */ 2044}; 2045 2046device_t root_bus; 2047devclass_t root_devclass; 2048 2049static int 2050root_bus_module_handler(module_t mod, int what, void* arg) 2051{ 2052 switch (what) { 2053 case MOD_LOAD: 2054 compile_methods(&root_driver); 2055 root_bus = make_device(NULL, "root", 0, NULL); 2056 root_bus->desc = "System root bus"; 2057 root_bus->ops = root_driver.ops; 2058 root_bus->driver = &root_driver; 2059 root_bus->state = DS_ATTACHED; 2060 root_devclass = devclass_find_internal("root", FALSE); 2061 return 0; 2062 2063 case MOD_SHUTDOWN: 2064 device_shutdown(root_bus); 2065 return 0; 2066 } 2067 2068 return 0; 2069} 2070 2071static moduledata_t root_bus_mod = { 2072 "rootbus", 2073 root_bus_module_handler, 2074 0 2075}; 2076DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2077 2078void 2079root_bus_configure(void) 2080{ 2081 device_t dev; 2082 2083 PDEBUG((".")); 2084 2085 for (dev = TAILQ_FIRST(&root_bus->children); dev; 2086 dev = TAILQ_NEXT(dev, link)) { 2087 device_probe_and_attach(dev); 2088 } 2089} 2090 2091int 2092driver_module_handler(module_t mod, int what, void *arg) 2093{ 2094 int error, i; 2095 struct driver_module_data *dmd; 2096 devclass_t bus_devclass; 2097 2098 dmd = (struct driver_module_data *)arg; 2099 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2100 error = 0; 2101 2102 switch (what) { 2103 case MOD_LOAD: 2104 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2105 PDEBUG(("Loading module: driver %s on bus %s", 2106 DRIVERNAME(dmd->dmd_drivers[i]), 2107 dmd->dmd_busname)); 2108 error = devclass_add_driver(bus_devclass, 2109 dmd->dmd_drivers[i]); 2110 } 2111 if (error) 2112 break; 2113 2114 /* 2115 * The drivers loaded in this way are assumed to all 2116 * implement the same devclass. 2117 */ 2118 *dmd->dmd_devclass = 2119 devclass_find_internal(dmd->dmd_drivers[0]->name, 2120 TRUE); 2121 break; 2122 2123 case MOD_UNLOAD: 2124 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2125 PDEBUG(("Unloading module: driver %s from bus %s", 2126 DRIVERNAME(dmd->dmd_drivers[i]), 2127 dmd->dmd_busname)); 2128 error = devclass_delete_driver(bus_devclass, 2129 dmd->dmd_drivers[i]); 2130 } 2131 break; 2132 } 2133 2134 if (!error && dmd->dmd_chainevh) 2135 error = dmd->dmd_chainevh(mod, what, dmd->dmd_chainarg); 2136 return (error); 2137} 2138 2139#ifdef BUS_DEBUG 2140 2141/* the _short versions avoid iteration by not calling anything that prints 2142 * more than oneliners. I love oneliners. 2143 */ 2144 2145static void 2146print_method_list(device_method_t *m, int indent) 2147{ 2148 int i; 2149 2150 if (!m) 2151 return; 2152 2153 for (i = 0; m->desc; i++, m++) 2154 indentprintf(("method %d: %s, offset=%d\n", 2155 i, m->desc->name, m->desc->offset)); 2156} 2157 2158static void 2159print_device_ops(device_ops_t ops, int indent) 2160{ 2161 int i; 2162 int count = 0; 2163 2164 if (!ops) 2165 return; 2166 2167 /* we present a list of the methods that are pointing to the 2168 * error_method, but ignore the 0'th elements; it is always 2169 * error_method. 2170 */ 2171 for (i = 1; i < ops->maxoffset; i++) { 2172 if (ops->methods[i] == error_method) { 2173 if (count == 0) 2174 indentprintf(("error_method:")); 2175 printf(" %d", i); 2176 count++; 2177 } 2178 } 2179 if (count) 2180 printf("\n"); 2181 2182 indentprintf(("(%d method%s, %d valid, %d error_method%s)\n", 2183 ops->maxoffset-1, (ops->maxoffset-1 == 1? "":"s"), 2184 ops->maxoffset-1-count, 2185 count, (count == 1? "":"'s"))); 2186} 2187 2188static void 2189print_device_short(device_t dev, int indent) 2190{ 2191 if (!dev) 2192 return; 2193 2194 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%sivars,%ssoftc,busy=%d\n", 2195 dev->unit, dev->desc, 2196 (dev->parent? "":"no "), 2197 (TAILQ_EMPTY(&dev->children)? "no ":""), 2198 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2199 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2200 (dev->flags&DF_WILDCARD? "wildcard,":""), 2201 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2202 (dev->ivars? "":"no "), 2203 (dev->softc? "":"no "), 2204 dev->busy)); 2205} 2206 2207static void 2208print_device(device_t dev, int indent) 2209{ 2210 if (!dev) 2211 return; 2212 2213 print_device_short(dev, indent); 2214 2215 indentprintf(("Parent:\n")); 2216 print_device_short(dev->parent, indent+1); 2217 indentprintf(("Methods:\n")); 2218 print_device_ops(dev->ops, indent+1); 2219 indentprintf(("Driver:\n")); 2220 print_driver_short(dev->driver, indent+1); 2221 indentprintf(("Devclass:\n")); 2222 print_devclass_short(dev->devclass, indent+1); 2223} 2224 2225void 2226print_device_tree_short(device_t dev, int indent) 2227/* print the device and all its children (indented) */ 2228{ 2229 device_t child; 2230 2231 if (!dev) 2232 return; 2233 2234 print_device_short(dev, indent); 2235 2236 for (child = TAILQ_FIRST(&dev->children); child; 2237 child = TAILQ_NEXT(child, link)) 2238 print_device_tree_short(child, indent+1); 2239} 2240 2241void 2242print_device_tree(device_t dev, int indent) 2243/* print the device and all its children (indented) */ 2244{ 2245 device_t child; 2246 2247 if (!dev) 2248 return; 2249 2250 print_device(dev, indent); 2251 2252 for (child = TAILQ_FIRST(&dev->children); child; 2253 child = TAILQ_NEXT(child, link)) 2254 print_device_tree(child, indent+1); 2255} 2256 2257static void 2258print_driver_short(driver_t *driver, int indent) 2259{ 2260 if (!driver) 2261 return; 2262 2263 indentprintf(("driver %s: type = %s%s%s%s, softc size = %d\n", 2264 driver->name, 2265 /* yes, I know this looks silly, but going to bed at 2266 * two o'clock and having to get up at 7:30 again is silly 2267 * as well. As is sticking your head in a bucket of water. 2268 */ 2269 (driver->type == DRIVER_TYPE_TTY? "tty":""), 2270 (driver->type == DRIVER_TYPE_BIO? "bio":""), 2271 (driver->type == DRIVER_TYPE_NET? "net":""), 2272 (driver->type == DRIVER_TYPE_MISC? "misc":""), 2273 driver->softc)); 2274} 2275 2276static void 2277print_driver(driver_t *driver, int indent) 2278{ 2279 if (!driver) 2280 return; 2281 2282 print_driver_short(driver, indent); 2283 indentprintf(("Methods:\n")); 2284 print_method_list(driver->methods, indent+1); 2285 indentprintf(("Operations:\n")); 2286 print_device_ops(driver->ops, indent+1); 2287} 2288 2289 2290static void 2291print_driver_list(driver_list_t drivers, int indent) 2292{ 2293 driver_t *driver; 2294 2295 for (driver = TAILQ_FIRST(&drivers); driver; 2296 driver = TAILQ_NEXT(driver, link)) 2297 print_driver(driver, indent); 2298} 2299 2300static void 2301print_devclass_short(devclass_t dc, int indent) 2302{ 2303 if ( !dc ) 2304 return; 2305 2306 indentprintf(("devclass %s: max units = %d, next unit = %d\n", 2307 dc->name, dc->maxunit, dc->nextunit)); 2308} 2309 2310static void 2311print_devclass(devclass_t dc, int indent) 2312{ 2313 int i; 2314 2315 if ( !dc ) 2316 return; 2317 2318 print_devclass_short(dc, indent); 2319 indentprintf(("Drivers:\n")); 2320 print_driver_list(dc->drivers, indent+1); 2321 2322 indentprintf(("Devices:\n")); 2323 for (i = 0; i < dc->maxunit; i++) 2324 if (dc->devices[i]) 2325 print_device(dc->devices[i], indent+1); 2326} 2327 2328void 2329print_devclass_list_short(void) 2330{ 2331 devclass_t dc; 2332 2333 printf("Short listing of devclasses, drivers & devices:\n"); 2334 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2335 print_devclass_short(dc, 0); 2336} 2337 2338void 2339print_devclass_list(void) 2340{ 2341 devclass_t dc; 2342 2343 printf("Full listing of devclasses, drivers & devices:\n"); 2344 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2345 print_devclass(dc, 0); 2346} 2347 2348#endif 2349