subr_bus.c revision 49706
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 1.35 1999/08/11 22:55:39 peter 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 %p has the same name, %s, with offset %d", 132 (void *)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 desc->method = 0; 163 } 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_create(const char *classname) 275{ 276 return devclass_find_internal(classname, TRUE); 277} 278 279devclass_t 280devclass_find(const char *classname) 281{ 282 return devclass_find_internal(classname, FALSE); 283} 284 285int 286devclass_add_driver(devclass_t dc, driver_t *driver) 287{ 288 driverlink_t dl; 289 int i; 290 291 PDEBUG(("%s", DRIVERNAME(driver))); 292 293 dl = malloc(sizeof *dl, M_DEVBUF, M_NOWAIT); 294 if (!dl) 295 return ENOMEM; 296 bzero(dl, sizeof *dl); 297 298 /* 299 * Compile the driver's methods. 300 */ 301 if (!driver->ops) 302 compile_methods(driver); 303 304 /* 305 * Make sure the devclass which the driver is implementing exists. 306 */ 307 devclass_find_internal(driver->name, TRUE); 308 309 dl->driver = driver; 310 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 311 driver->refs++; 312 313 /* 314 * Call BUS_DRIVER_ADDED for any existing busses in this class. 315 */ 316 for (i = 0; i < dc->maxunit; i++) 317 if (dc->devices[i]) 318 BUS_DRIVER_ADDED(dc->devices[i], driver); 319 320 return 0; 321} 322 323int 324devclass_delete_driver(devclass_t busclass, driver_t *driver) 325{ 326 devclass_t dc = devclass_find(driver->name); 327 driverlink_t dl; 328 device_t dev; 329 int i; 330 int error; 331 332 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 333 334 if (!dc) 335 return 0; 336 337 /* 338 * Find the link structure in the bus' list of drivers. 339 */ 340 for (dl = TAILQ_FIRST(&busclass->drivers); dl; 341 dl = TAILQ_NEXT(dl, link)) { 342 if (dl->driver == driver) 343 break; 344 } 345 346 if (!dl) { 347 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 348 return ENOENT; 349 } 350 351 /* 352 * Disassociate from any devices. We iterate through all the 353 * devices in the devclass of the driver and detach any which are 354 * using the driver and which have a parent in the devclass which 355 * we are deleting from. 356 * 357 * Note that since a driver can be in multiple devclasses, we 358 * should not detach devices which are not children of devices in 359 * the affected devclass. 360 */ 361 for (i = 0; i < dc->maxunit; i++) { 362 if (dc->devices[i]) { 363 dev = dc->devices[i]; 364 if (dev->driver == driver 365 && dev->parent && dev->parent->devclass == busclass) { 366 if ((error = device_detach(dev)) != 0) 367 return error; 368 device_set_driver(dev, NULL); 369 } 370 } 371 } 372 373 TAILQ_REMOVE(&busclass->drivers, dl, link); 374 free(dl, M_DEVBUF); 375 376 driver->refs--; 377 if (driver->refs == 0) 378 free_methods(driver); 379 380 return 0; 381} 382 383static driverlink_t 384devclass_find_driver_internal(devclass_t dc, const char *classname) 385{ 386 driverlink_t dl; 387 388 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 389 390 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) { 391 if (!strcmp(dl->driver->name, classname)) 392 return dl; 393 } 394 395 PDEBUG(("not found")); 396 return NULL; 397} 398 399driver_t * 400devclass_find_driver(devclass_t dc, const char *classname) 401{ 402 driverlink_t dl; 403 404 dl = devclass_find_driver_internal(dc, classname); 405 if (dl) 406 return dl->driver; 407 else 408 return NULL; 409} 410 411const char * 412devclass_get_name(devclass_t dc) 413{ 414 return dc->name; 415} 416 417device_t 418devclass_get_device(devclass_t dc, int unit) 419{ 420 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 421 return NULL; 422 return dc->devices[unit]; 423} 424 425void * 426devclass_get_softc(devclass_t dc, int unit) 427{ 428 device_t dev; 429 430 if (unit < 0 || unit >= dc->maxunit) 431 return NULL; 432 dev = dc->devices[unit]; 433 if (!dev || dev->state < DS_ATTACHED) 434 return NULL; 435 return dev->softc; 436} 437 438int 439devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 440{ 441 int i; 442 int count; 443 device_t *list; 444 445 count = 0; 446 for (i = 0; i < dc->maxunit; i++) 447 if (dc->devices[i]) 448 count++; 449 450 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 451 if (!list) 452 return ENOMEM; 453 bzero(list, count * sizeof(device_t)); 454 455 count = 0; 456 for (i = 0; i < dc->maxunit; i++) 457 if (dc->devices[i]) { 458 list[count] = dc->devices[i]; 459 count++; 460 } 461 462 *devlistp = list; 463 *devcountp = count; 464 465 return 0; 466} 467 468int 469devclass_get_maxunit(devclass_t dc) 470{ 471 return dc->maxunit; 472} 473 474static int 475devclass_alloc_unit(devclass_t dc, int *unitp) 476{ 477 int unit = *unitp; 478 479 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 480 481 /* 482 * If we have been given a wired unit number, check for existing 483 * device. 484 */ 485 if (unit != -1) { 486 device_t dev; 487 dev = devclass_get_device(dc, unit); 488 if (dev) { 489 printf("devclass_alloc_unit: %s%d already exists, using next available unit number\n", dc->name, unit); 490 unit = -1; 491 } 492 } 493 494 if (unit == -1) { 495 unit = dc->nextunit; 496 dc->nextunit++; 497 } else if (dc->nextunit <= unit) 498 dc->nextunit = unit + 1; 499 500 if (unit >= dc->maxunit) { 501 device_t *newlist; 502 int newsize; 503 504 newsize = (dc->maxunit ? 2 * dc->maxunit 505 : MINALLOCSIZE / sizeof(device_t)); 506 newlist = malloc(sizeof(device_t) * newsize, M_DEVBUF, M_NOWAIT); 507 if (!newlist) 508 return ENOMEM; 509 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 510 bzero(newlist + dc->maxunit, 511 sizeof(device_t) * (newsize - dc->maxunit)); 512 if (dc->devices) 513 free(dc->devices, M_DEVBUF); 514 dc->devices = newlist; 515 dc->maxunit = newsize; 516 } 517 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 518 519 *unitp = unit; 520 return 0; 521} 522 523static int 524devclass_add_device(devclass_t dc, device_t dev) 525{ 526 int buflen, error; 527 528 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 529 530 buflen = strlen(dc->name) + 5; 531 dev->nameunit = malloc(buflen, M_DEVBUF, M_NOWAIT); 532 if (!dev->nameunit) 533 return ENOMEM; 534 bzero(dev->nameunit, buflen); 535 536 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 537 free(dev->nameunit, M_DEVBUF); 538 dev->nameunit = NULL; 539 return error; 540 } 541 dc->devices[dev->unit] = dev; 542 dev->devclass = dc; 543 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 544 545#ifdef DEVICE_SYSCTLS 546 device_register_oids(dev); 547#endif 548 549 return 0; 550} 551 552static int 553devclass_delete_device(devclass_t dc, device_t dev) 554{ 555 if (!dc || !dev) 556 return 0; 557 558 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 559 560 if (dev->devclass != dc 561 || dc->devices[dev->unit] != dev) 562 panic("devclass_delete_device: inconsistent device class"); 563 dc->devices[dev->unit] = NULL; 564 if (dev->flags & DF_WILDCARD) 565 dev->unit = -1; 566 dev->devclass = NULL; 567 free(dev->nameunit, M_DEVBUF); 568 dev->nameunit = NULL; 569 while (dc->nextunit > 0 && dc->devices[dc->nextunit - 1] == NULL) 570 dc->nextunit--; 571 572#ifdef DEVICE_SYSCTLS 573 device_unregister_oids(dev); 574#endif 575 576 return 0; 577} 578 579static device_t 580make_device(device_t parent, const char *name, 581 int unit, void *ivars) 582{ 583 device_t dev; 584 devclass_t dc; 585 586 PDEBUG(("%s at %s as unit %d with%s ivars", 587 name, DEVICENAME(parent), unit, (ivars? "":"out"))); 588 589 if (name) { 590 dc = devclass_find_internal(name, TRUE); 591 if (!dc) { 592 printf("make_device: can't find device class %s\n", name); 593 return NULL; 594 } 595 } else 596 dc = NULL; 597 598 dev = malloc(sizeof(struct device), M_DEVBUF, M_NOWAIT); 599 if (!dev) 600 return 0; 601 bzero(dev, sizeof(struct device)); 602 603 dev->parent = parent; 604 TAILQ_INIT(&dev->children); 605 dev->ops = &null_ops; 606 dev->driver = NULL; 607 dev->devclass = NULL; 608 dev->unit = unit; 609 dev->nameunit = NULL; 610 dev->desc = NULL; 611 dev->busy = 0; 612 dev->flags = DF_ENABLED; 613 dev->order = 0; 614 if (unit == -1) 615 dev->flags |= DF_WILDCARD; 616 if (name) { 617 dev->flags |= DF_FIXEDCLASS; 618 devclass_add_device(dc, dev); 619 } 620 dev->ivars = ivars; 621 dev->softc = NULL; 622 623 dev->state = DS_NOTPRESENT; 624 625 return dev; 626} 627 628static int 629device_print_child(device_t dev, device_t child) 630{ 631 int retval = 0; 632 633 if (device_is_alive(child)) { 634 retval += BUS_PRINT_CHILD(dev, child); 635 } else 636 retval += device_printf(child, " not found\n"); 637 638 return (retval); 639} 640 641device_t 642device_add_child(device_t dev, const char *name, int unit, void *ivars) 643{ 644 return device_add_child_ordered(dev, 0, name, unit, ivars); 645} 646 647device_t 648device_add_child_ordered(device_t dev, int order, 649 const char *name, int unit, void *ivars) 650{ 651 device_t child; 652 device_t place; 653 654 PDEBUG(("%s at %s with order %d as unit %d with%s ivars", 655 name, DEVICENAME(dev), order, unit, (ivars? "":"out"))); 656 657 child = make_device(dev, name, unit, ivars); 658 if (child == NULL) 659 return child; 660 child->order = order; 661 662 TAILQ_FOREACH(place, &dev->children, link) 663 if (place->order > order) 664 break; 665 666 if (place) { 667 /* 668 * The device 'place' is the first device whose order is 669 * greater than the new child. 670 */ 671 TAILQ_INSERT_BEFORE(place, child, link); 672 } else { 673 /* 674 * The new child's order is greater or equal to the order of 675 * any existing device. Add the child to the tail of the list. 676 */ 677 TAILQ_INSERT_TAIL(&dev->children, child, link); 678 } 679 680 return child; 681} 682 683int 684device_delete_child(device_t dev, device_t child) 685{ 686 int error; 687 device_t grandchild; 688 689 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 690 691 /* remove children first */ 692 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 693 error = device_delete_child(child, grandchild); 694 if (error) 695 return error; 696 } 697 698 if ((error = device_detach(child)) != 0) 699 return error; 700 if (child->devclass) 701 devclass_delete_device(child->devclass, child); 702 TAILQ_REMOVE(&dev->children, child, link); 703 device_set_desc(child, NULL); 704 free(child, M_DEVBUF); 705 706 return 0; 707} 708 709/* 710 * Find only devices attached to this bus. 711 */ 712device_t 713device_find_child(device_t dev, const char *classname, int unit) 714{ 715 devclass_t dc; 716 device_t child; 717 718 dc = devclass_find(classname); 719 if (!dc) 720 return NULL; 721 722 child = devclass_get_device(dc, unit); 723 if (child && child->parent == dev) 724 return child; 725 return NULL; 726} 727 728static driverlink_t 729first_matching_driver(devclass_t dc, device_t dev) 730{ 731 if (dev->devclass) 732 return devclass_find_driver_internal(dc, dev->devclass->name); 733 else 734 return TAILQ_FIRST(&dc->drivers); 735} 736 737static driverlink_t 738next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 739{ 740 if (dev->devclass) { 741 driverlink_t dl; 742 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 743 if (!strcmp(dev->devclass->name, dl->driver->name)) 744 return dl; 745 return NULL; 746 } else 747 return TAILQ_NEXT(last, link); 748} 749 750static int 751device_probe_child(device_t dev, device_t child) 752{ 753 devclass_t dc; 754 driverlink_t best = 0; 755 driverlink_t dl; 756 int result, pri = 0; 757 758 dc = dev->devclass; 759 if (dc == NULL) 760 panic("device_probe_child: parent device has no devclass"); 761 762 if (child->state == DS_ALIVE) 763 return 0; 764 765 for (dl = first_matching_driver(dc, child); 766 dl; 767 dl = next_matching_driver(dc, child, dl)) { 768 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 769 device_set_driver(child, dl->driver); 770 result = DEVICE_PROBE(child); 771 772 /* 773 * If the driver returns SUCCESS, there can be no higher match 774 * for this device. 775 */ 776 if (result == 0) { 777 best = dl; 778 pri = 0; 779 break; 780 } 781 782 /* 783 * The driver returned an error so it certainly doesn't match. 784 */ 785 if (result > 0) 786 continue; 787 788 /* 789 * A priority lower than SUCCESS, remember the best matching 790 * driver. Initialise the value of pri for the first match. 791 */ 792 if (best == 0 || result > pri) { 793 best = dl; 794 pri = result; 795 continue; 796 } 797 } 798 799 /* 800 * If we found a driver, change state and initialise the devclass. 801 */ 802 if (best) { 803 if (!child->devclass) 804 device_set_devclass(child, best->driver->name); 805 device_set_driver(child, best->driver); 806 if (pri < 0) { 807 /* 808 * A bit bogus. Call the probe method again to make sure 809 * that we have the right description. 810 */ 811 DEVICE_PROBE(child); 812 } 813 child->state = DS_ALIVE; 814 return 0; 815 } 816 817 return ENXIO; 818} 819 820device_t 821device_get_parent(device_t dev) 822{ 823 return dev->parent; 824} 825 826int 827device_get_children(device_t dev, device_t **devlistp, int *devcountp) 828{ 829 int count; 830 device_t child; 831 device_t *list; 832 833 count = 0; 834 for (child = TAILQ_FIRST(&dev->children); child; 835 child = TAILQ_NEXT(child, link)) 836 count++; 837 838 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT); 839 if (!list) 840 return ENOMEM; 841 bzero(list, count * sizeof(device_t)); 842 843 count = 0; 844 for (child = TAILQ_FIRST(&dev->children); child; 845 child = TAILQ_NEXT(child, link)) { 846 list[count] = child; 847 count++; 848 } 849 850 *devlistp = list; 851 *devcountp = count; 852 853 return 0; 854} 855 856driver_t * 857device_get_driver(device_t dev) 858{ 859 return dev->driver; 860} 861 862devclass_t 863device_get_devclass(device_t dev) 864{ 865 return dev->devclass; 866} 867 868const char * 869device_get_name(device_t dev) 870{ 871 if (dev->devclass) 872 return devclass_get_name(dev->devclass); 873 return NULL; 874} 875 876const char * 877device_get_nameunit(device_t dev) 878{ 879 return dev->nameunit; 880} 881 882int 883device_get_unit(device_t dev) 884{ 885 return dev->unit; 886} 887 888const char * 889device_get_desc(device_t dev) 890{ 891 return dev->desc; 892} 893 894int 895device_print_prettyname(device_t dev) 896{ 897 const char *name = device_get_name(dev); 898 899 if (name == 0) 900 name = "(no driver assigned)"; 901 return(printf("%s%d: ", name, device_get_unit(dev))); 902} 903 904int 905device_printf(device_t dev, const char * fmt, ...) 906{ 907 va_list ap; 908 int retval; 909 910 retval = device_print_prettyname(dev); 911 va_start(ap, fmt); 912 retval += vprintf(fmt, ap); 913 va_end(ap); 914 return retval; 915} 916 917static void 918device_set_desc_internal(device_t dev, const char* desc, int copy) 919{ 920 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 921 free(dev->desc, M_DEVBUF); 922 dev->flags &= ~DF_DESCMALLOCED; 923 dev->desc = NULL; 924 } 925 926 if (copy && desc) { 927 dev->desc = malloc(strlen(desc) + 1, M_DEVBUF, M_NOWAIT); 928 if (dev->desc) { 929 strcpy(dev->desc, desc); 930 dev->flags |= DF_DESCMALLOCED; 931 } 932 } else 933 /* Avoid a -Wcast-qual warning */ 934 dev->desc = (char *)(uintptr_t) desc; 935 936#ifdef DEVICE_SYSCTLS 937 { 938 struct sysctl_oid *oid = &dev->oid[1]; 939 oid->oid_arg1 = dev->desc ? dev->desc : ""; 940 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 941 } 942#endif 943} 944 945void 946device_set_desc(device_t dev, const char* desc) 947{ 948 device_set_desc_internal(dev, desc, FALSE); 949} 950 951void 952device_set_desc_copy(device_t dev, const char* desc) 953{ 954 device_set_desc_internal(dev, desc, TRUE); 955} 956 957void * 958device_get_softc(device_t dev) 959{ 960 return dev->softc; 961} 962 963void * 964device_get_ivars(device_t dev) 965{ 966 return dev->ivars; 967} 968 969device_state_t 970device_get_state(device_t dev) 971{ 972 return dev->state; 973} 974 975void 976device_enable(device_t dev) 977{ 978 dev->flags |= DF_ENABLED; 979} 980 981void 982device_disable(device_t dev) 983{ 984 dev->flags &= ~DF_ENABLED; 985} 986 987void 988device_busy(device_t dev) 989{ 990 if (dev->state < DS_ATTACHED) 991 panic("device_busy: called for unattached device"); 992 if (dev->busy == 0 && dev->parent) 993 device_busy(dev->parent); 994 dev->busy++; 995 dev->state = DS_BUSY; 996} 997 998void 999device_unbusy(device_t dev) 1000{ 1001 if (dev->state != DS_BUSY) 1002 panic("device_unbusy: called for non-busy device"); 1003 dev->busy--; 1004 if (dev->busy == 0) { 1005 if (dev->parent) 1006 device_unbusy(dev->parent); 1007 dev->state = DS_ATTACHED; 1008 } 1009} 1010 1011void 1012device_quiet(device_t dev) 1013{ 1014 dev->flags |= DF_QUIET; 1015} 1016 1017void 1018device_verbose(device_t dev) 1019{ 1020 dev->flags &= ~DF_QUIET; 1021} 1022 1023int 1024device_is_quiet(device_t dev) 1025{ 1026 return (dev->flags & DF_QUIET) != 0; 1027} 1028 1029int 1030device_is_enabled(device_t dev) 1031{ 1032 return (dev->flags & DF_ENABLED) != 0; 1033} 1034 1035int 1036device_is_alive(device_t dev) 1037{ 1038 return dev->state >= DS_ALIVE; 1039} 1040 1041int 1042device_set_devclass(device_t dev, const char *classname) 1043{ 1044 devclass_t dc; 1045 1046 if (dev->devclass) { 1047 printf("device_set_devclass: device class already set\n"); 1048 return EINVAL; 1049 } 1050 1051 dc = devclass_find_internal(classname, TRUE); 1052 if (!dc) 1053 return ENOMEM; 1054 1055 return devclass_add_device(dc, dev); 1056} 1057 1058int 1059device_set_driver(device_t dev, driver_t *driver) 1060{ 1061 if (dev->state >= DS_ATTACHED) 1062 return EBUSY; 1063 1064 if (dev->driver == driver) 1065 return 0; 1066 1067 if (dev->softc) { 1068 free(dev->softc, M_DEVBUF); 1069 dev->softc = NULL; 1070 } 1071 dev->ops = &null_ops; 1072 dev->driver = driver; 1073 if (driver) { 1074 dev->ops = driver->ops; 1075 dev->softc = malloc(driver->softc, M_DEVBUF, M_NOWAIT); 1076 if (!dev->softc) { 1077 dev->ops = &null_ops; 1078 dev->driver = NULL; 1079 return ENOMEM; 1080 } 1081 bzero(dev->softc, driver->softc); 1082 } 1083 return 0; 1084} 1085 1086int 1087device_probe_and_attach(device_t dev) 1088{ 1089 device_t bus = dev->parent; 1090 int error = 0; 1091 1092 if (dev->state >= DS_ALIVE) 1093 return 0; 1094 1095 if (dev->flags & DF_ENABLED) { 1096 error = device_probe_child(bus, dev); 1097 if (!error) { 1098 if (!device_is_quiet(dev)) 1099 device_print_child(bus, dev); 1100 error = DEVICE_ATTACH(dev); 1101 if (!error) 1102 dev->state = DS_ATTACHED; 1103 else { 1104 printf("device_probe_and_attach: %s%d attach returned %d\n", 1105 dev->driver->name, dev->unit, error); 1106 device_set_driver(dev, NULL); 1107 dev->state = DS_NOTPRESENT; 1108 } 1109 } else { 1110 BUS_PROBE_NOMATCH(bus, dev); 1111 } 1112 } else { 1113 device_print_prettyname(dev); 1114 printf("not probed (disabled)\n"); 1115 } 1116 1117 return error; 1118} 1119 1120int 1121device_detach(device_t dev) 1122{ 1123 int error; 1124 1125 PDEBUG(("%s", DEVICENAME(dev))); 1126 if (dev->state == DS_BUSY) 1127 return EBUSY; 1128 if (dev->state != DS_ATTACHED) 1129 return 0; 1130 1131 if ((error = DEVICE_DETACH(dev)) != 0) 1132 return error; 1133 if (dev->parent) 1134 BUS_CHILD_DETACHED(dev->parent, dev); 1135 1136 if (!(dev->flags & DF_FIXEDCLASS)) 1137 devclass_delete_device(dev->devclass, dev); 1138 1139 dev->state = DS_NOTPRESENT; 1140 device_set_driver(dev, NULL); 1141 1142 return 0; 1143} 1144 1145int 1146device_shutdown(device_t dev) 1147{ 1148 if (dev->state < DS_ATTACHED) 1149 return 0; 1150 return DEVICE_SHUTDOWN(dev); 1151} 1152 1153#ifdef DEVICE_SYSCTLS 1154 1155/* 1156 * Sysctl nodes for devices. 1157 */ 1158 1159SYSCTL_NODE(_hw, OID_AUTO, devices, CTLFLAG_RW, 0, "A list of all devices"); 1160 1161static int 1162sysctl_handle_children SYSCTL_HANDLER_ARGS 1163{ 1164 device_t dev = arg1; 1165 device_t child; 1166 int first = 1, error = 0; 1167 1168 for (child = TAILQ_FIRST(&dev->children); child; 1169 child = TAILQ_NEXT(child, link)) { 1170 if (child->nameunit) { 1171 if (!first) { 1172 error = SYSCTL_OUT(req, ",", 1); 1173 if (error) return error; 1174 } else { 1175 first = 0; 1176 } 1177 error = SYSCTL_OUT(req, child->nameunit, strlen(child->nameunit)); 1178 if (error) return error; 1179 } 1180 } 1181 1182 error = SYSCTL_OUT(req, "", 1); 1183 1184 return error; 1185} 1186 1187static int 1188sysctl_handle_state SYSCTL_HANDLER_ARGS 1189{ 1190 device_t dev = arg1; 1191 1192 switch (dev->state) { 1193 case DS_NOTPRESENT: 1194 return SYSCTL_OUT(req, "notpresent", sizeof("notpresent")); 1195 case DS_ALIVE: 1196 return SYSCTL_OUT(req, "alive", sizeof("alive")); 1197 case DS_ATTACHED: 1198 return SYSCTL_OUT(req, "attached", sizeof("attached")); 1199 case DS_BUSY: 1200 return SYSCTL_OUT(req, "busy", sizeof("busy")); 1201 } 1202 1203 return 0; 1204} 1205 1206static void 1207device_register_oids(device_t dev) 1208{ 1209 struct sysctl_oid* oid; 1210 1211 oid = &dev->oid[0]; 1212 bzero(oid, sizeof(*oid)); 1213 oid->oid_parent = &sysctl__hw_devices_children; 1214 oid->oid_number = OID_AUTO; 1215 oid->oid_kind = CTLTYPE_NODE | CTLFLAG_RW; 1216 oid->oid_arg1 = &dev->oidlist[0]; 1217 oid->oid_arg2 = 0; 1218 oid->oid_name = dev->nameunit; 1219 oid->oid_handler = 0; 1220 oid->oid_fmt = "N"; 1221 SLIST_INIT(&dev->oidlist[0]); 1222 sysctl_register_oid(oid); 1223 1224 oid = &dev->oid[1]; 1225 bzero(oid, sizeof(*oid)); 1226 oid->oid_parent = &dev->oidlist[0]; 1227 oid->oid_number = OID_AUTO; 1228 oid->oid_kind = CTLTYPE_STRING | CTLFLAG_RD; 1229 oid->oid_arg1 = dev->desc ? dev->desc : ""; 1230 oid->oid_arg2 = dev->desc ? strlen(dev->desc) : 0; 1231 oid->oid_name = "desc"; 1232 oid->oid_handler = sysctl_handle_string; 1233 oid->oid_fmt = "A"; 1234 sysctl_register_oid(oid); 1235 1236 oid = &dev->oid[2]; 1237 bzero(oid, sizeof(*oid)); 1238 oid->oid_parent = &dev->oidlist[0]; 1239 oid->oid_number = OID_AUTO; 1240 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1241 oid->oid_arg1 = dev; 1242 oid->oid_arg2 = 0; 1243 oid->oid_name = "children"; 1244 oid->oid_handler = sysctl_handle_children; 1245 oid->oid_fmt = "A"; 1246 sysctl_register_oid(oid); 1247 1248 oid = &dev->oid[3]; 1249 bzero(oid, sizeof(*oid)); 1250 oid->oid_parent = &dev->oidlist[0]; 1251 oid->oid_number = OID_AUTO; 1252 oid->oid_kind = CTLTYPE_INT | CTLFLAG_RD; 1253 oid->oid_arg1 = dev; 1254 oid->oid_arg2 = 0; 1255 oid->oid_name = "state"; 1256 oid->oid_handler = sysctl_handle_state; 1257 oid->oid_fmt = "A"; 1258 sysctl_register_oid(oid); 1259} 1260 1261static void 1262device_unregister_oids(device_t dev) 1263{ 1264 sysctl_unregister_oid(&dev->oid[0]); 1265 sysctl_unregister_oid(&dev->oid[1]); 1266 sysctl_unregister_oid(&dev->oid[2]); 1267} 1268 1269#endif 1270 1271/*======================================*/ 1272/* 1273 * Access functions for device resources. 1274 */ 1275 1276/* Supplied by config(8) in ioconf.c */ 1277extern struct config_device config_devtab[]; 1278extern int devtab_count; 1279 1280/* Runtime version */ 1281struct config_device *devtab = config_devtab; 1282 1283static int 1284resource_new_name(char *name, int unit) 1285{ 1286 struct config_device *new; 1287 1288 new = malloc((devtab_count + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1289 if (new == NULL) 1290 return -1; 1291 if (devtab && devtab_count > 0) 1292 bcopy(devtab, new, devtab_count * sizeof(*new)); 1293 bzero(&new[devtab_count], sizeof(*new)); 1294 new[devtab_count].name = malloc(strlen(name) + 1, M_TEMP, M_NOWAIT); 1295 if (new[devtab_count].name == NULL) { 1296 free(new, M_TEMP); 1297 return -1; 1298 } 1299 strcpy(new[devtab_count].name, name); 1300 new[devtab_count].unit = unit; 1301 new[devtab_count].resource_count = 0; 1302 new[devtab_count].resources = NULL; 1303 devtab = new; 1304 return devtab_count++; 1305} 1306 1307static int 1308resource_new_resname(int j, char *resname, resource_type type) 1309{ 1310 struct config_resource *new; 1311 int i; 1312 1313 i = devtab[j].resource_count; 1314 new = malloc((i + 1) * sizeof(*new), M_TEMP, M_NOWAIT); 1315 if (new == NULL) 1316 return -1; 1317 if (devtab[j].resources && i > 0) 1318 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1319 bzero(&new[i], sizeof(*new)); 1320 new[i].name = malloc(strlen(resname) + 1, M_TEMP, M_NOWAIT); 1321 if (new[i].name == NULL) { 1322 free(new, M_TEMP); 1323 return -1; 1324 } 1325 strcpy(new[i].name, resname); 1326 new[i].type = type; 1327 if (devtab[j].resources) 1328 free(devtab[j].resources, M_TEMP); 1329 devtab[j].resources = new; 1330 devtab[j].resource_count = i + 1; 1331 return i; 1332} 1333 1334static int 1335resource_match_string(int i, char *resname, char *value) 1336{ 1337 int j; 1338 struct config_resource *res; 1339 1340 for (j = 0, res = devtab[i].resources; 1341 j < devtab[i].resource_count; j++, res++) 1342 if (!strcmp(res->name, resname) 1343 && res->type == RES_STRING 1344 && !strcmp(res->u.stringval, value)) 1345 return j; 1346 return -1; 1347} 1348 1349static int 1350resource_find(const char *name, int unit, char *resname, 1351 struct config_resource **result) 1352{ 1353 int i, j; 1354 struct config_resource *res; 1355 1356 /* 1357 * First check specific instances, then generic. 1358 */ 1359 for (i = 0; i < devtab_count; i++) { 1360 if (devtab[i].unit < 0) 1361 continue; 1362 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1363 res = devtab[i].resources; 1364 for (j = 0; j < devtab[i].resource_count; j++, res++) 1365 if (!strcmp(res->name, resname)) { 1366 *result = res; 1367 return 0; 1368 } 1369 } 1370 } 1371 for (i = 0; i < devtab_count; i++) { 1372 if (devtab[i].unit >= 0) 1373 continue; 1374 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1375 /* XXX if so, then the generic match does nothing */ 1376 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 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 1388int 1389resource_int_value(const char *name, int unit, char *resname, int *result) 1390{ 1391 int error; 1392 struct config_resource *res; 1393 1394 if ((error = resource_find(name, unit, resname, &res)) != 0) 1395 return error; 1396 if (res->type != RES_INT) 1397 return EFTYPE; 1398 *result = res->u.intval; 1399 return 0; 1400} 1401 1402int 1403resource_long_value(const char *name, int unit, char *resname, long *result) 1404{ 1405 int error; 1406 struct config_resource *res; 1407 1408 if ((error = resource_find(name, unit, resname, &res)) != 0) 1409 return error; 1410 if (res->type != RES_LONG) 1411 return EFTYPE; 1412 *result = res->u.longval; 1413 return 0; 1414} 1415 1416int 1417resource_string_value(const char *name, int unit, char *resname, char **result) 1418{ 1419 int error; 1420 struct config_resource *res; 1421 1422 if ((error = resource_find(name, unit, resname, &res)) != 0) 1423 return error; 1424 if (res->type != RES_STRING) 1425 return EFTYPE; 1426 *result = res->u.stringval; 1427 return 0; 1428} 1429 1430int 1431resource_query_string(int i, char *resname, char *value) 1432{ 1433 if (i < 0) 1434 i = 0; 1435 else 1436 i = i + 1; 1437 for (; i < devtab_count; i++) 1438 if (resource_match_string(i, resname, value) >= 0) 1439 return i; 1440 return -1; 1441} 1442 1443int 1444resource_locate(int i, char *resname) 1445{ 1446 if (i < 0) 1447 i = 0; 1448 else 1449 i = i + 1; 1450 for (; i < devtab_count; i++) 1451 if (!strcmp(devtab[i].name, resname)) 1452 return i; 1453 return -1; 1454} 1455 1456int 1457resource_count(void) 1458{ 1459 return devtab_count; 1460} 1461 1462char * 1463resource_query_name(int i) 1464{ 1465 return devtab[i].name; 1466} 1467 1468int 1469resource_query_unit(int i) 1470{ 1471 return devtab[i].unit; 1472} 1473 1474static int 1475resource_create(char *name, int unit, char *resname, resource_type type, 1476 struct config_resource **result) 1477{ 1478 int i, j; 1479 struct config_resource *res = NULL; 1480 1481 for (i = 0; i < devtab_count; i++) { 1482 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1483 res = devtab[i].resources; 1484 break; 1485 } 1486 } 1487 if (res == NULL) { 1488 i = resource_new_name(name, unit); 1489 if (i < 0) 1490 return ENOMEM; 1491 res = devtab[i].resources; 1492 } 1493 for (j = 0; j < devtab[i].resource_count; j++, res++) { 1494 if (!strcmp(res->name, resname)) { 1495 *result = res; 1496 return 0; 1497 } 1498 } 1499 j = resource_new_resname(i, resname, type); 1500 if (j < 0) 1501 return ENOMEM; 1502 res = &devtab[i].resources[j]; 1503 *result = res; 1504 return 0; 1505} 1506 1507int 1508resource_set_int(char *name, int unit, char *resname, int value) 1509{ 1510 int error; 1511 struct config_resource *res; 1512 1513 error = resource_create(name, unit, resname, RES_INT, &res); 1514 if (error) 1515 return error; 1516 if (res->type != RES_INT) 1517 return EFTYPE; 1518 res->u.intval = value; 1519 return 0; 1520} 1521 1522int 1523resource_set_long(char *name, int unit, char *resname, long value) 1524{ 1525 int error; 1526 struct config_resource *res; 1527 1528 error = resource_create(name, unit, resname, RES_LONG, &res); 1529 if (error) 1530 return error; 1531 if (res->type != RES_LONG) 1532 return EFTYPE; 1533 res->u.longval = value; 1534 return 0; 1535} 1536 1537int 1538resource_set_string(char *name, int unit, char *resname, char *value) 1539{ 1540 int error; 1541 struct config_resource *res; 1542 1543 error = resource_create(name, unit, resname, RES_STRING, &res); 1544 if (error) 1545 return error; 1546 if (res->type != RES_STRING) 1547 return EFTYPE; 1548 if (res->u.stringval) 1549 free(res->u.stringval, M_TEMP); 1550 res->u.stringval = malloc(strlen(value) + 1, M_TEMP, M_NOWAIT); 1551 if (res->u.stringval == NULL) 1552 return ENOMEM; 1553 strcpy(res->u.stringval, value); 1554 return 0; 1555} 1556 1557 1558static void 1559resource_cfgload(void *dummy __unused) 1560{ 1561 struct config_resource *res, *cfgres; 1562 int i, j; 1563 int error; 1564 char *name, *resname; 1565 int unit; 1566 resource_type type; 1567 char *stringval; 1568 int config_devtab_count; 1569 1570 config_devtab_count = devtab_count; 1571 devtab = NULL; 1572 devtab_count = 0; 1573 1574 for (i = 0; i < config_devtab_count; i++) { 1575 name = config_devtab[i].name; 1576 unit = config_devtab[i].unit; 1577 1578 for (j = 0; j < config_devtab[i].resource_count; j++) { 1579 cfgres = config_devtab[i].resources; 1580 resname = cfgres[j].name; 1581 type = cfgres[j].type; 1582 error = resource_create(name, unit, resname, type, 1583 &res); 1584 if (error) { 1585 printf("create resource %s%d: error %d\n", 1586 name, unit, error); 1587 continue; 1588 } 1589 if (res->type != type) { 1590 printf("type mismatch %s%d: %d != %d\n", 1591 name, unit, res->type, type); 1592 continue; 1593 } 1594 switch (type) { 1595 case RES_INT: 1596 res->u.intval = cfgres[j].u.intval; 1597 break; 1598 case RES_LONG: 1599 res->u.longval = cfgres[j].u.longval; 1600 break; 1601 case RES_STRING: 1602 if (res->u.stringval) 1603 free(res->u.stringval, M_TEMP); 1604 stringval = cfgres[j].u.stringval; 1605 res->u.stringval = malloc(strlen(stringval) + 1, 1606 M_TEMP, M_NOWAIT); 1607 if (res->u.stringval == NULL) 1608 break; 1609 strcpy(res->u.stringval, stringval); 1610 break; 1611 default: 1612 panic("unknown resource type %d\n", type); 1613 } 1614 } 1615 } 1616} 1617SYSINIT(cfgload, SI_SUB_KMEM, SI_ORDER_ANY + 50, resource_cfgload, 0) 1618 1619 1620/*======================================*/ 1621/* 1622 * Some useful method implementations to make life easier for bus drivers. 1623 */ 1624 1625void 1626resource_list_init(struct resource_list *rl) 1627{ 1628 SLIST_INIT(rl); 1629} 1630 1631void 1632resource_list_free(struct resource_list *rl) 1633{ 1634 struct resource_list_entry *rle; 1635 1636 while ((rle = SLIST_FIRST(rl)) != NULL) { 1637 if (rle->res) 1638 panic("resource_list_free: resource entry is busy"); 1639 SLIST_REMOVE_HEAD(rl, link); 1640 free(rle, M_DEVBUF); 1641 } 1642} 1643 1644void 1645resource_list_add(struct resource_list *rl, 1646 int type, int rid, 1647 u_long start, u_long end, u_long count) 1648{ 1649 struct resource_list_entry *rle; 1650 1651 rle = resource_list_find(rl, type, rid); 1652 if (!rle) { 1653 rle = malloc(sizeof(struct resource_list_entry), M_DEVBUF, M_NOWAIT); 1654 if (!rle) 1655 panic("resource_list_add: can't record entry"); 1656 SLIST_INSERT_HEAD(rl, rle, link); 1657 rle->type = type; 1658 rle->rid = rid; 1659 rle->res = NULL; 1660 } 1661 1662 if (rle->res) 1663 panic("resource_list_add: resource entry is busy"); 1664 1665 rle->start = start; 1666 rle->end = end; 1667 rle->count = count; 1668} 1669 1670struct resource_list_entry* 1671resource_list_find(struct resource_list *rl, 1672 int type, int rid) 1673{ 1674 struct resource_list_entry *rle; 1675 1676 SLIST_FOREACH(rle, rl, link) 1677 if (rle->type == type && rle->rid == rid) 1678 return rle; 1679 return NULL; 1680} 1681 1682void 1683resource_list_delete(struct resource_list *rl, 1684 int type, int rid) 1685{ 1686 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1687 1688 if (rle) { 1689 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1690 free(rle, M_DEVBUF); 1691 } 1692} 1693 1694struct resource * 1695resource_list_alloc(device_t bus, device_t child, 1696 int type, int *rid, 1697 u_long start, u_long end, 1698 u_long count, u_int flags) 1699{ 1700 struct resource_list *rl; 1701 struct resource_list_entry *rle = 0; 1702 int passthrough = (device_get_parent(child) != bus); 1703 int isdefault = (start == 0UL && end == ~0UL); 1704 1705 if (passthrough) { 1706 return BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1707 type, rid, 1708 start, end, count, flags); 1709 } 1710 1711 rl = device_get_ivars(child); 1712 rle = resource_list_find(rl, type, *rid); 1713 1714 if (!rle) 1715 return 0; /* no resource of that type/rid */ 1716 if (rle->res) 1717 panic("resource_list_alloc: resource entry is busy"); 1718 1719 if (isdefault) { 1720 start = rle->start; 1721 count = max(count, rle->count); 1722 end = max(rle->end, start + count - 1); 1723 } 1724 1725 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1726 type, rid, start, end, count, flags); 1727 1728 /* 1729 * Record the new range. 1730 */ 1731 if (rle->res) { 1732 rle->start = rman_get_start(rle->res); 1733 rle->end = rman_get_end(rle->res); 1734 rle->count = count; 1735 } 1736 1737 return rle->res; 1738} 1739 1740int 1741resource_list_release(device_t bus, device_t child, 1742 int type, int rid, struct resource *res) 1743{ 1744 struct resource_list *rl; 1745 struct resource_list_entry *rle = 0; 1746 int passthrough = (device_get_parent(child) != bus); 1747 int error; 1748 1749 if (passthrough) { 1750 return BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1751 type, rid, res); 1752 } 1753 1754 rl = device_get_ivars(child); 1755 rle = resource_list_find(rl, type, rid); 1756 1757 if (!rle) 1758 panic("resource_list_release: can't find resource"); 1759 if (!rle->res) 1760 panic("resource_list_release: resource entry is not busy"); 1761 1762 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1763 type, rid, res); 1764 if (error) 1765 return error; 1766 1767 rle->res = NULL; 1768 return 0; 1769} 1770 1771/* 1772 * Call DEVICE_IDENTIFY for each driver. 1773 */ 1774int 1775bus_generic_probe(device_t dev) 1776{ 1777 devclass_t dc = dev->devclass; 1778 driverlink_t dl; 1779 1780 for (dl = TAILQ_FIRST(&dc->drivers); dl; dl = TAILQ_NEXT(dl, link)) 1781 DEVICE_IDENTIFY(dl->driver, dev); 1782 1783 return 0; 1784} 1785 1786int 1787bus_generic_attach(device_t dev) 1788{ 1789 device_t child; 1790 1791 for (child = TAILQ_FIRST(&dev->children); 1792 child; child = TAILQ_NEXT(child, link)) 1793 device_probe_and_attach(child); 1794 1795 return 0; 1796} 1797 1798int 1799bus_generic_detach(device_t dev) 1800{ 1801 device_t child; 1802 int error; 1803 1804 if (dev->state != DS_ATTACHED) 1805 return EBUSY; 1806 1807 for (child = TAILQ_FIRST(&dev->children); 1808 child; child = TAILQ_NEXT(child, link)) 1809 if ((error = device_detach(child)) != 0) 1810 return error; 1811 1812 return 0; 1813} 1814 1815int 1816bus_generic_shutdown(device_t dev) 1817{ 1818 device_t child; 1819 1820 for (child = TAILQ_FIRST(&dev->children); 1821 child; child = TAILQ_NEXT(child, link)) 1822 device_shutdown(child); 1823 1824 return 0; 1825} 1826 1827int 1828bus_generic_suspend(device_t dev) 1829{ 1830 int error; 1831 device_t child, child2; 1832 1833 for (child = TAILQ_FIRST(&dev->children); 1834 child; child = TAILQ_NEXT(child, link)) { 1835 error = DEVICE_SUSPEND(child); 1836 if (error) { 1837 for (child2 = TAILQ_FIRST(&dev->children); 1838 child2 && child2 != child; 1839 child2 = TAILQ_NEXT(child2, link)) 1840 DEVICE_RESUME(child2); 1841 return (error); 1842 } 1843 } 1844 return 0; 1845} 1846 1847int 1848bus_generic_resume(device_t dev) 1849{ 1850 device_t child; 1851 1852 for (child = TAILQ_FIRST(&dev->children); 1853 child; child = TAILQ_NEXT(child, link)) { 1854 DEVICE_RESUME(child); 1855 /* if resume fails, there's nothing we can usefully do... */ 1856 } 1857 return 0; 1858} 1859 1860int 1861bus_print_child_header (device_t dev, device_t child) 1862{ 1863 int retval = 0; 1864 1865 if (device_get_desc(child)) { 1866 retval += device_printf(child, "<%s>", 1867 device_get_desc(child)); 1868 } else { 1869 retval += printf("%s", device_get_nameunit(child)); 1870 } 1871 1872 return (retval); 1873} 1874 1875int 1876bus_print_child_footer (device_t dev, device_t child) 1877{ 1878 return(printf(" on %s\n", device_get_nameunit(dev))); 1879} 1880 1881int 1882bus_generic_print_child(device_t dev, device_t child) 1883{ 1884 int retval = 0; 1885 1886 retval += bus_print_child_header(dev, child); 1887 retval += bus_print_child_footer(dev, child); 1888 1889 return (retval); 1890} 1891 1892int 1893bus_generic_read_ivar(device_t dev, device_t child, int index, 1894 uintptr_t * result) 1895{ 1896 return ENOENT; 1897} 1898 1899int 1900bus_generic_write_ivar(device_t dev, device_t child, int index, 1901 uintptr_t value) 1902{ 1903 return ENOENT; 1904} 1905 1906void 1907bus_generic_driver_added(device_t dev, driver_t *driver) 1908{ 1909 device_t child; 1910 1911 for (child = TAILQ_FIRST(&dev->children); 1912 child; child = TAILQ_NEXT(child, link)) 1913 if (child->state == DS_NOTPRESENT) 1914 device_probe_and_attach(child); 1915} 1916 1917int 1918bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1919 int flags, driver_intr_t *intr, void *arg, 1920 void **cookiep) 1921{ 1922 /* Propagate up the bus hierarchy until someone handles it. */ 1923 if (dev->parent) 1924 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1925 intr, arg, cookiep)); 1926 else 1927 return (EINVAL); 1928} 1929 1930int 1931bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1932 void *cookie) 1933{ 1934 /* Propagate up the bus hierarchy until someone handles it. */ 1935 if (dev->parent) 1936 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1937 else 1938 return (EINVAL); 1939} 1940 1941struct resource * 1942bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1943 u_long start, u_long end, u_long count, u_int flags) 1944{ 1945 /* Propagate up the bus hierarchy until someone handles it. */ 1946 if (dev->parent) 1947 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1948 start, end, count, flags)); 1949 else 1950 return (NULL); 1951} 1952 1953int 1954bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1955 struct resource *r) 1956{ 1957 /* Propagate up the bus hierarchy until someone handles it. */ 1958 if (dev->parent) 1959 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1960 r)); 1961 else 1962 return (EINVAL); 1963} 1964 1965int 1966bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1967 struct resource *r) 1968{ 1969 /* Propagate up the bus hierarchy until someone handles it. */ 1970 if (dev->parent) 1971 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1972 r)); 1973 else 1974 return (EINVAL); 1975} 1976 1977int 1978bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1979 int rid, struct resource *r) 1980{ 1981 /* Propagate up the bus hierarchy until someone handles it. */ 1982 if (dev->parent) 1983 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1984 r)); 1985 else 1986 return (EINVAL); 1987} 1988 1989/* 1990 * Some convenience functions to make it easier for drivers to use the 1991 * resource-management functions. All these really do is hide the 1992 * indirection through the parent's method table, making for slightly 1993 * less-wordy code. In the future, it might make sense for this code 1994 * to maintain some sort of a list of resources allocated by each device. 1995 */ 1996struct resource * 1997bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 1998 u_long count, u_int flags) 1999{ 2000 if (dev->parent == 0) 2001 return (0); 2002 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2003 count, flags)); 2004} 2005 2006int 2007bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2008{ 2009 if (dev->parent == 0) 2010 return (EINVAL); 2011 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2012} 2013 2014int 2015bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2016{ 2017 if (dev->parent == 0) 2018 return (EINVAL); 2019 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2020} 2021 2022int 2023bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2024{ 2025 if (dev->parent == 0) 2026 return (EINVAL); 2027 return (BUS_RELEASE_RESOURCE(dev->parent, dev, 2028 type, rid, r)); 2029} 2030 2031int 2032bus_setup_intr(device_t dev, struct resource *r, int flags, 2033 driver_intr_t handler, void *arg, void **cookiep) 2034{ 2035 if (dev->parent == 0) 2036 return (EINVAL); 2037 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 2038 handler, arg, cookiep)); 2039} 2040 2041int 2042bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2043{ 2044 if (dev->parent == 0) 2045 return (EINVAL); 2046 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2047} 2048 2049static int 2050root_print_child(device_t dev, device_t child) 2051{ 2052 return (0); 2053} 2054 2055static int 2056root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2057 void **cookiep) 2058{ 2059 /* 2060 * If an interrupt mapping gets to here something bad has happened. 2061 */ 2062 panic("root_setup_intr"); 2063} 2064 2065static device_method_t root_methods[] = { 2066 /* Device interface */ 2067 DEVMETHOD(device_shutdown, bus_generic_shutdown), 2068 DEVMETHOD(device_suspend, bus_generic_suspend), 2069 DEVMETHOD(device_resume, bus_generic_resume), 2070 2071 /* Bus interface */ 2072 DEVMETHOD(bus_print_child, root_print_child), 2073 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), 2074 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), 2075 DEVMETHOD(bus_setup_intr, root_setup_intr), 2076 2077 { 0, 0 } 2078}; 2079 2080static driver_t root_driver = { 2081 "root", 2082 root_methods, 2083 1, /* no softc */ 2084}; 2085 2086device_t root_bus; 2087devclass_t root_devclass; 2088 2089static int 2090root_bus_module_handler(module_t mod, int what, void* arg) 2091{ 2092 switch (what) { 2093 case MOD_LOAD: 2094 compile_methods(&root_driver); 2095 root_bus = make_device(NULL, "root", 0, NULL); 2096 root_bus->desc = "System root bus"; 2097 root_bus->ops = root_driver.ops; 2098 root_bus->driver = &root_driver; 2099 root_bus->state = DS_ATTACHED; 2100 root_devclass = devclass_find_internal("root", FALSE); 2101 return 0; 2102 2103 case MOD_SHUTDOWN: 2104 device_shutdown(root_bus); 2105 return 0; 2106 } 2107 2108 return 0; 2109} 2110 2111static moduledata_t root_bus_mod = { 2112 "rootbus", 2113 root_bus_module_handler, 2114 0 2115}; 2116DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2117 2118void 2119root_bus_configure(void) 2120{ 2121 device_t dev; 2122 2123 PDEBUG((".")); 2124 2125 for (dev = TAILQ_FIRST(&root_bus->children); dev; 2126 dev = TAILQ_NEXT(dev, link)) { 2127 device_probe_and_attach(dev); 2128 } 2129} 2130 2131int 2132driver_module_handler(module_t mod, int what, void *arg) 2133{ 2134 int error, i; 2135 struct driver_module_data *dmd; 2136 devclass_t bus_devclass; 2137 2138 dmd = (struct driver_module_data *)arg; 2139 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2140 error = 0; 2141 2142 switch (what) { 2143 case MOD_LOAD: 2144 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2145 PDEBUG(("Loading module: driver %s on bus %s", 2146 DRIVERNAME(dmd->dmd_drivers[i]), 2147 dmd->dmd_busname)); 2148 error = devclass_add_driver(bus_devclass, 2149 dmd->dmd_drivers[i]); 2150 } 2151 if (error) 2152 break; 2153 2154 /* 2155 * The drivers loaded in this way are assumed to all 2156 * implement the same devclass. 2157 */ 2158 *dmd->dmd_devclass = 2159 devclass_find_internal(dmd->dmd_drivers[0]->name, 2160 TRUE); 2161 break; 2162 2163 case MOD_UNLOAD: 2164 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2165 PDEBUG(("Unloading module: driver %s from bus %s", 2166 DRIVERNAME(dmd->dmd_drivers[i]), 2167 dmd->dmd_busname)); 2168 error = devclass_delete_driver(bus_devclass, 2169 dmd->dmd_drivers[i]); 2170 } 2171 break; 2172 } 2173 2174 if (!error && dmd->dmd_chainevh) 2175 error = dmd->dmd_chainevh(mod, what, dmd->dmd_chainarg); 2176 return (error); 2177} 2178 2179#ifdef BUS_DEBUG 2180 2181/* the _short versions avoid iteration by not calling anything that prints 2182 * more than oneliners. I love oneliners. 2183 */ 2184 2185static void 2186print_method_list(device_method_t *m, int indent) 2187{ 2188 int i; 2189 2190 if (!m) 2191 return; 2192 2193 for (i = 0; m->desc; i++, m++) 2194 indentprintf(("method %d: %s, offset=%d\n", 2195 i, m->desc->name, m->desc->offset)); 2196} 2197 2198static void 2199print_device_ops(device_ops_t ops, int indent) 2200{ 2201 int i; 2202 int count = 0; 2203 2204 if (!ops) 2205 return; 2206 2207 /* we present a list of the methods that are pointing to the 2208 * error_method, but ignore the 0'th elements; it is always 2209 * error_method. 2210 */ 2211 for (i = 1; i < ops->maxoffset; i++) { 2212 if (ops->methods[i] == error_method) { 2213 if (count == 0) 2214 indentprintf(("error_method:")); 2215 printf(" %d", i); 2216 count++; 2217 } 2218 } 2219 if (count) 2220 printf("\n"); 2221 2222 indentprintf(("(%d method%s, %d valid, %d error_method%s)\n", 2223 ops->maxoffset-1, (ops->maxoffset-1 == 1? "":"s"), 2224 ops->maxoffset-1-count, 2225 count, (count == 1? "":"'s"))); 2226} 2227 2228static void 2229print_device_short(device_t dev, int indent) 2230{ 2231 if (!dev) 2232 return; 2233 2234 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2235 dev->unit, dev->desc, 2236 (dev->parent? "":"no "), 2237 (TAILQ_EMPTY(&dev->children)? "no ":""), 2238 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2239 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2240 (dev->flags&DF_WILDCARD? "wildcard,":""), 2241 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2242 (dev->ivars? "":"no "), 2243 (dev->softc? "":"no "), 2244 dev->busy)); 2245} 2246 2247static void 2248print_device(device_t dev, int indent) 2249{ 2250 if (!dev) 2251 return; 2252 2253 print_device_short(dev, indent); 2254 2255 indentprintf(("Parent:\n")); 2256 print_device_short(dev->parent, indent+1); 2257 indentprintf(("Methods:\n")); 2258 print_device_ops(dev->ops, indent+1); 2259 indentprintf(("Driver:\n")); 2260 print_driver_short(dev->driver, indent+1); 2261 indentprintf(("Devclass:\n")); 2262 print_devclass_short(dev->devclass, indent+1); 2263} 2264 2265void 2266print_device_tree_short(device_t dev, int indent) 2267/* print the device and all its children (indented) */ 2268{ 2269 device_t child; 2270 2271 if (!dev) 2272 return; 2273 2274 print_device_short(dev, indent); 2275 2276 for (child = TAILQ_FIRST(&dev->children); child; 2277 child = TAILQ_NEXT(child, link)) 2278 print_device_tree_short(child, indent+1); 2279} 2280 2281void 2282print_device_tree(device_t dev, int indent) 2283/* print the device and all its children (indented) */ 2284{ 2285 device_t child; 2286 2287 if (!dev) 2288 return; 2289 2290 print_device(dev, indent); 2291 2292 for (child = TAILQ_FIRST(&dev->children); child; 2293 child = TAILQ_NEXT(child, link)) 2294 print_device_tree(child, indent+1); 2295} 2296 2297static void 2298print_driver_short(driver_t *driver, int indent) 2299{ 2300 if (!driver) 2301 return; 2302 2303 indentprintf(("driver %s: softc size = %d\n", 2304 driver->name, driver->softc)); 2305} 2306 2307static void 2308print_driver(driver_t *driver, int indent) 2309{ 2310 if (!driver) 2311 return; 2312 2313 print_driver_short(driver, indent); 2314 indentprintf(("Methods:\n")); 2315 print_method_list(driver->methods, indent+1); 2316 indentprintf(("Operations:\n")); 2317 print_device_ops(driver->ops, indent+1); 2318} 2319 2320 2321static void 2322print_driver_list(driver_list_t drivers, int indent) 2323{ 2324 driverlink_t driver; 2325 2326 for (driver = TAILQ_FIRST(&drivers); driver; 2327 driver = TAILQ_NEXT(driver, link)) 2328 print_driver(driver->driver, indent); 2329} 2330 2331static void 2332print_devclass_short(devclass_t dc, int indent) 2333{ 2334 if ( !dc ) 2335 return; 2336 2337 indentprintf(("devclass %s: max units = %d, next unit = %d\n", 2338 dc->name, dc->maxunit, dc->nextunit)); 2339} 2340 2341static void 2342print_devclass(devclass_t dc, int indent) 2343{ 2344 int i; 2345 2346 if ( !dc ) 2347 return; 2348 2349 print_devclass_short(dc, indent); 2350 indentprintf(("Drivers:\n")); 2351 print_driver_list(dc->drivers, indent+1); 2352 2353 indentprintf(("Devices:\n")); 2354 for (i = 0; i < dc->maxunit; i++) 2355 if (dc->devices[i]) 2356 print_device(dc->devices[i], indent+1); 2357} 2358 2359void 2360print_devclass_list_short(void) 2361{ 2362 devclass_t dc; 2363 2364 printf("Short listing of devclasses, drivers & devices:\n"); 2365 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2366 print_devclass_short(dc, 0); 2367} 2368 2369void 2370print_devclass_list(void) 2371{ 2372 devclass_t dc; 2373 2374 printf("Full listing of devclasses, drivers & devices:\n"); 2375 for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link)) 2376 print_devclass(dc, 0); 2377} 2378 2379#endif 2380