1 /* $NetBSD: subr_autoconf.c,v 1.92 2004/10/15 04:38:37 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 2000 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the 18 * NetBSD Project. See http://www.NetBSD.org/ for 19 * information about NetBSD. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * --(license Id: LICENSE.proto,v 1.1 2000/06/13 21:40:26 cgd Exp )-- 35 */ 36 37 /* 38 * Copyright (c) 1992, 1993 39 * The Regents of the University of California. All rights reserved. 40 * 41 * This software was developed by the Computer Systems Engineering group 42 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 43 * contributed to Berkeley. 44 * 45 * All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Lawrence Berkeley Laboratories. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Header: subr_autoconf.c,v 1.12 93/02/01 19:31:48 torek Exp (LBL) 75 * 76 * @(#)subr_autoconf.c 8.3 (Berkeley) 5/17/94 77 */ 78 79 #include <sys/cdefs.h> 80 __KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.92 2004/10/15 04:38:37 thorpej Exp $"); 81 82 #include "opt_ddb.h" 83 84 #include <sys/param.h> 85 #include <sys/device.h> 86 #include <sys/malloc.h> 87 #include <sys/systm.h> 88 #include <sys/kernel.h> 89 #include <sys/errno.h> 90 #include <sys/proc.h> 91 #include <sys/reboot.h> 92 #include <machine/limits.h> 93 94 #include "opt_userconf.h" 95 #ifdef USERCONF 96 #include <sys/userconf.h> 97 #endif 98 99 /* 100 * Autoconfiguration subroutines. 101 */ 102 103 /* 104 * ioconf.c exports exactly two names: cfdata and cfroots. All system 105 * devices and drivers are found via these tables. 106 */ 107 extern struct cfdata cfdata[]; 108 extern const short cfroots[]; 109 110 /* 111 * List of all cfdriver structures. We use this to detect duplicates 112 * when other cfdrivers are loaded. 113 */ 114 struct cfdriverlist allcfdrivers = LIST_HEAD_INITIALIZER(&allcfdrivers); 115 extern struct cfdriver * const cfdriver_list_initial[]; 116 117 /* 118 * Initial list of cfattach's. 119 */ 120 extern const struct cfattachinit cfattachinit[]; 121 122 /* 123 * List of cfdata tables. We always have one such list -- the one 124 * built statically when the kernel was configured. 125 */ 126 struct cftablelist allcftables; 127 static struct cftable initcftable; 128 129 /* 130 * Database of device properties. 131 */ 132 propdb_t dev_propdb; 133 134 #define ROOT ((struct device *)NULL) 135 136 struct matchinfo { 137 cfmatch_t fn; 138 cfmatch_loc_t fn_loc; 139 struct device *parent; 140 const locdesc_t *ldesc; 141 void *aux; 142 struct cfdata *match; 143 int pri; 144 }; 145 146 static char *number(char *, int); 147 static void mapply(struct matchinfo *, struct cfdata *); 148 149 struct deferred_config { 150 TAILQ_ENTRY(deferred_config) dc_queue; 151 struct device *dc_dev; 152 void (*dc_func)(struct device *); 153 }; 154 155 TAILQ_HEAD(deferred_config_head, deferred_config); 156 157 struct deferred_config_head deferred_config_queue; 158 struct deferred_config_head interrupt_config_queue; 159 160 static void config_process_deferred(struct deferred_config_head *, 161 struct device *); 162 163 /* Hooks to finalize configuration once all real devices have been found. */ 164 struct finalize_hook { 165 TAILQ_ENTRY(finalize_hook) f_list; 166 int (*f_func)(struct device *); 167 struct device *f_dev; 168 }; 169 static TAILQ_HEAD(, finalize_hook) config_finalize_list; 170 static int config_finalize_done; 171 172 /* list of all devices */ 173 struct devicelist alldevs; 174 175 __volatile int config_pending; /* semaphore for mountroot */ 176 177 #define STREQ(s1, s2) \ 178 (*(s1) == *(s2) && strcmp((s1), (s2)) == 0) 179 180 static int config_initialized; /* config_init() has been called. */ 181 182 static int config_do_twiddle; 183 184 /* 185 * Initialize the autoconfiguration data structures. Normally this 186 * is done by configure(), but some platforms need to do this very 187 * early (to e.g. initialize the console). 188 */ 189 void 190 config_init(void) 191 { 192 const struct cfattachinit *cfai; 193 int i, j; 194 195 if (config_initialized) 196 return; 197 198 /* allcfdrivers is statically initialized. */ 199 for (i = 0; cfdriver_list_initial[i] != NULL; i++) { 200 if (config_cfdriver_attach(cfdriver_list_initial[i]) != 0) 201 panic("configure: duplicate `%s' drivers", 202 cfdriver_list_initial[i]->cd_name); 203 } 204 205 for (cfai = &cfattachinit[0]; cfai->cfai_name != NULL; cfai++) { 206 for (j = 0; cfai->cfai_list[j] != NULL; j++) { 207 if (config_cfattach_attach(cfai->cfai_name, 208 cfai->cfai_list[j]) != 0) 209 panic("configure: duplicate `%s' attachment " 210 "of `%s' driver", 211 cfai->cfai_list[j]->ca_name, 212 cfai->cfai_name); 213 } 214 } 215 216 TAILQ_INIT(&allcftables); 217 initcftable.ct_cfdata = cfdata; 218 TAILQ_INSERT_TAIL(&allcftables, &initcftable, ct_list); 219 220 TAILQ_INIT(&deferred_config_queue); 221 TAILQ_INIT(&interrupt_config_queue); 222 TAILQ_INIT(&config_finalize_list); 223 TAILQ_INIT(&alldevs); 224 225 config_initialized = 1; 226 } 227 228 /* 229 * Configure the system's hardware. 230 */ 231 void 232 configure(void) 233 { 234 int errcnt; 235 236 /* Initialize data structures. */ 237 config_init(); 238 239 /* Initialize the device property database. */ 240 dev_propdb = propdb_create("device properties"); 241 if (dev_propdb == NULL) 242 panic("unable to create device property database"); 243 244 #ifdef USERCONF 245 if (boothowto & RB_USERCONF) 246 user_config(); 247 #endif 248 249 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 250 config_do_twiddle = 1; 251 printf_nolog("Detecting hardware..."); 252 } 253 254 /* 255 * Do the machine-dependent portion of autoconfiguration. This 256 * sets the configuration machinery here in motion by "finding" 257 * the root bus. When this function returns, we expect interrupts 258 * to be enabled. 259 */ 260 cpu_configure(); 261 262 /* 263 * Now that we've found all the hardware, start the real time 264 * and statistics clocks. 265 */ 266 initclocks(); 267 268 cold = 0; /* clocks are running, we're warm now! */ 269 270 /* 271 * Now callback to finish configuration for devices which want 272 * to do this once interrupts are enabled. 273 */ 274 config_process_deferred(&interrupt_config_queue, NULL); 275 276 errcnt = aprint_get_error_count(); 277 if ((boothowto & (AB_QUIET|AB_SILENT)) != 0 && 278 (boothowto & AB_VERBOSE) == 0) { 279 if (config_do_twiddle) { 280 config_do_twiddle = 0; 281 printf_nolog("done.\n"); 282 } 283 if (errcnt != 0) { 284 printf("WARNING: %d error%s while detecting hardware; " 285 "check system log.\n", errcnt, 286 errcnt == 1 ? "" : "s"); 287 } 288 } 289 } 290 291 /* 292 * Add a cfdriver to the system. 293 */ 294 int 295 config_cfdriver_attach(struct cfdriver *cd) 296 { 297 struct cfdriver *lcd; 298 299 /* Make sure this driver isn't already in the system. */ 300 LIST_FOREACH(lcd, &allcfdrivers, cd_list) { 301 if (STREQ(lcd->cd_name, cd->cd_name)) 302 return (EEXIST); 303 } 304 305 LIST_INIT(&cd->cd_attach); 306 LIST_INSERT_HEAD(&allcfdrivers, cd, cd_list); 307 308 return (0); 309 } 310 311 /* 312 * Remove a cfdriver from the system. 313 */ 314 int 315 config_cfdriver_detach(struct cfdriver *cd) 316 { 317 int i; 318 319 /* Make sure there are no active instances. */ 320 for (i = 0; i < cd->cd_ndevs; i++) { 321 if (cd->cd_devs[i] != NULL) 322 return (EBUSY); 323 } 324 325 /* ...and no attachments loaded. */ 326 if (LIST_EMPTY(&cd->cd_attach) == 0) 327 return (EBUSY); 328 329 LIST_REMOVE(cd, cd_list); 330 331 KASSERT(cd->cd_devs == NULL); 332 333 return (0); 334 } 335 336 /* 337 * Look up a cfdriver by name. 338 */ 339 struct cfdriver * 340 config_cfdriver_lookup(const char *name) 341 { 342 struct cfdriver *cd; 343 344 LIST_FOREACH(cd, &allcfdrivers, cd_list) { 345 if (STREQ(cd->cd_name, name)) 346 return (cd); 347 } 348 349 return (NULL); 350 } 351 352 /* 353 * Add a cfattach to the specified driver. 354 */ 355 int 356 config_cfattach_attach(const char *driver, struct cfattach *ca) 357 { 358 struct cfattach *lca; 359 struct cfdriver *cd; 360 361 cd = config_cfdriver_lookup(driver); 362 if (cd == NULL) 363 return (ESRCH); 364 365 /* Make sure this attachment isn't already on this driver. */ 366 LIST_FOREACH(lca, &cd->cd_attach, ca_list) { 367 if (STREQ(lca->ca_name, ca->ca_name)) 368 return (EEXIST); 369 } 370 371 LIST_INSERT_HEAD(&cd->cd_attach, ca, ca_list); 372 373 return (0); 374 } 375 376 /* 377 * Remove a cfattach from the specified driver. 378 */ 379 int 380 config_cfattach_detach(const char *driver, struct cfattach *ca) 381 { 382 struct cfdriver *cd; 383 struct device *dev; 384 int i; 385 386 cd = config_cfdriver_lookup(driver); 387 if (cd == NULL) 388 return (ESRCH); 389 390 /* Make sure there are no active instances. */ 391 for (i = 0; i < cd->cd_ndevs; i++) { 392 if ((dev = cd->cd_devs[i]) == NULL) 393 continue; 394 if (dev->dv_cfattach == ca) 395 return (EBUSY); 396 } 397 398 LIST_REMOVE(ca, ca_list); 399 400 return (0); 401 } 402 403 /* 404 * Look up a cfattach by name. 405 */ 406 static struct cfattach * 407 config_cfattach_lookup_cd(struct cfdriver *cd, const char *atname) 408 { 409 struct cfattach *ca; 410 411 LIST_FOREACH(ca, &cd->cd_attach, ca_list) { 412 if (STREQ(ca->ca_name, atname)) 413 return (ca); 414 } 415 416 return (NULL); 417 } 418 419 /* 420 * Look up a cfattach by driver/attachment name. 421 */ 422 struct cfattach * 423 config_cfattach_lookup(const char *name, const char *atname) 424 { 425 struct cfdriver *cd; 426 427 cd = config_cfdriver_lookup(name); 428 if (cd == NULL) 429 return (NULL); 430 431 return (config_cfattach_lookup_cd(cd, atname)); 432 } 433 434 /* 435 * Apply the matching function and choose the best. This is used 436 * a few times and we want to keep the code small. 437 */ 438 static void 439 mapply(struct matchinfo *m, struct cfdata *cf) 440 { 441 int pri; 442 443 if (m->fn != NULL) { 444 KASSERT(m->fn_loc == NULL); 445 pri = (*m->fn)(m->parent, cf, m->aux); 446 } else if (m->fn_loc != NULL) { 447 pri = (*m->fn_loc)(m->parent, cf, m->ldesc, m->aux); 448 } else { 449 struct cfattach *ca; 450 451 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname); 452 if (ca == NULL) { 453 /* No attachment for this entry, oh well. */ 454 return; 455 } 456 if (ca->ca_match == NULL) { 457 panic("mapply: no match function for '%s' attachment " 458 "of '%s'", cf->cf_atname, cf->cf_name); 459 } 460 pri = (*ca->ca_match)(m->parent, cf, m->aux); 461 } 462 if (pri > m->pri) { 463 m->match = cf; 464 m->pri = pri; 465 } 466 } 467 468 /* 469 * Helper function: check whether the driver supports the interface attribute. 470 */ 471 static int 472 cfdriver_has_iattr(const struct cfdriver *cd, const char *ia) 473 { 474 const char * const *cpp; 475 476 if (cd->cd_attrs == NULL) 477 return (0); 478 479 for (cpp = cd->cd_attrs; *cpp; cpp++) { 480 if (STREQ(*cpp, ia)) { 481 /* Match. */ 482 return (1); 483 } 484 } 485 return (0); 486 } 487 488 /* 489 * Determine if `parent' is a potential parent for a device spec based 490 * on `cfp'. 491 */ 492 static int 493 cfparent_match(const struct device *parent, const struct cfparent *cfp) 494 { 495 struct cfdriver *pcd; 496 497 /* We don't match root nodes here. */ 498 if (cfp == NULL) 499 return (0); 500 501 pcd = parent->dv_cfdriver; 502 KASSERT(pcd != NULL); 503 504 /* 505 * First, ensure this parent has the correct interface 506 * attribute. 507 */ 508 if (!cfdriver_has_iattr(pcd, cfp->cfp_iattr)) 509 return (0); 510 511 /* 512 * If no specific parent device instance was specified (i.e. 513 * we're attaching to the attribute only), we're done! 514 */ 515 if (cfp->cfp_parent == NULL) 516 return (1); 517 518 /* 519 * Check the parent device's name. 520 */ 521 if (STREQ(pcd->cd_name, cfp->cfp_parent) == 0) 522 return (0); /* not the same parent */ 523 524 /* 525 * Make sure the unit number matches. 526 */ 527 if (cfp->cfp_unit == DVUNIT_ANY || /* wildcard */ 528 cfp->cfp_unit == parent->dv_unit) 529 return (1); 530 531 /* Unit numbers don't match. */ 532 return (0); 533 } 534 535 /* 536 * Helper for config_cfdata_attach(): check all devices whether it could be 537 * parent any attachment in the config data table passed, and rescan. 538 */ 539 static void 540 rescan_with_cfdata(const struct cfdata *cf) 541 { 542 struct device *d; 543 const struct cfdata *cf1; 544 545 /* 546 * "alldevs" is likely longer than an LKM's cfdata, so make it 547 * the outer loop. 548 */ 549 TAILQ_FOREACH(d, &alldevs, dv_list) { 550 551 if (!(d->dv_cfattach->ca_rescan)) 552 continue; 553 554 for (cf1 = cf; cf1->cf_name; cf1++) { 555 556 if (!cfparent_match(d, cf1->cf_pspec)) 557 continue; 558 559 (*d->dv_cfattach->ca_rescan)(d, 560 cf1->cf_pspec->cfp_iattr, cf1->cf_loc); 561 } 562 } 563 } 564 565 /* 566 * Attach a supplemental config data table and rescan potential 567 * parent devices if required. 568 */ 569 int 570 config_cfdata_attach(struct cfdata *cf, int scannow) 571 { 572 struct cftable *ct; 573 574 ct = malloc(sizeof(struct cftable), M_DEVBUF, M_WAITOK); 575 ct->ct_cfdata = cf; 576 TAILQ_INSERT_TAIL(&allcftables, ct, ct_list); 577 578 if (scannow) 579 rescan_with_cfdata(cf); 580 581 return (0); 582 } 583 584 /* 585 * Helper for config_cfdata_detach: check whether a device is 586 * found through any attachment in the config data table. 587 */ 588 static int 589 dev_in_cfdata(const struct device *d, const struct cfdata *cf) 590 { 591 const struct cfdata *cf1; 592 593 for (cf1 = cf; cf1->cf_name; cf1++) 594 if (d->dv_cfdata == cf1) 595 return (1); 596 597 return (0); 598 } 599 600 /* 601 * Detach a supplemental config data table. Detach all devices found 602 * through that table (and thus keeping references to it) before. 603 */ 604 int 605 config_cfdata_detach(struct cfdata *cf) 606 { 607 struct device *d; 608 int error; 609 struct cftable *ct; 610 611 again: 612 TAILQ_FOREACH(d, &alldevs, dv_list) { 613 if (dev_in_cfdata(d, cf)) { 614 error = config_detach(d, 0); 615 if (error) { 616 aprint_error("%s: unable to detach instance\n", 617 d->dv_xname); 618 return (error); 619 } 620 goto again; 621 } 622 } 623 624 TAILQ_FOREACH(ct, &allcftables, ct_list) { 625 if (ct->ct_cfdata == cf) { 626 TAILQ_REMOVE(&allcftables, ct, ct_list); 627 free(ct, M_DEVBUF); 628 return (0); 629 } 630 } 631 632 /* not found -- shouldn't happen */ 633 return (EINVAL); 634 } 635 636 /* 637 * Invoke the "match" routine for a cfdata entry on behalf of 638 * an external caller, usually a "submatch" routine. 639 */ 640 int 641 config_match(struct device *parent, struct cfdata *cf, void *aux) 642 { 643 struct cfattach *ca; 644 645 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname); 646 if (ca == NULL) { 647 /* No attachment for this entry, oh well. */ 648 return (0); 649 } 650 651 return ((*ca->ca_match)(parent, cf, aux)); 652 } 653 654 /* 655 * Iterate over all potential children of some device, calling the given 656 * function (default being the child's match function) for each one. 657 * Nonzero returns are matches; the highest value returned is considered 658 * the best match. Return the `found child' if we got a match, or NULL 659 * otherwise. The `aux' pointer is simply passed on through. 660 * 661 * Note that this function is designed so that it can be used to apply 662 * an arbitrary function to all potential children (its return value 663 * can be ignored). 664 */ 665 struct cfdata * 666 config_search(cfmatch_t fn, struct device *parent, void *aux) 667 { 668 struct cftable *ct; 669 struct cfdata *cf; 670 struct matchinfo m; 671 672 KASSERT(config_initialized); 673 674 m.fn = fn; 675 m.fn_loc = NULL; 676 m.parent = parent; 677 m.aux = aux; 678 m.match = NULL; 679 m.pri = 0; 680 681 TAILQ_FOREACH(ct, &allcftables, ct_list) { 682 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 683 /* 684 * Skip cf if no longer eligible, otherwise scan 685 * through parents for one matching `parent', and 686 * try match function. 687 */ 688 if (cf->cf_fstate == FSTATE_FOUND) 689 continue; 690 if (cf->cf_fstate == FSTATE_DNOTFOUND || 691 cf->cf_fstate == FSTATE_DSTAR) 692 continue; 693 if (cfparent_match(parent, cf->cf_pspec)) 694 mapply(&m, cf); 695 } 696 } 697 return (m.match); 698 } 699 700 /* same as above, with real locators passed */ 701 struct cfdata * 702 config_search_loc(cfmatch_loc_t fn, struct device *parent, 703 const char *ifattr, const locdesc_t *ldesc, void *aux) 704 { 705 struct cftable *ct; 706 struct cfdata *cf; 707 struct matchinfo m; 708 709 KASSERT(config_initialized); 710 KASSERT(!ifattr || cfdriver_has_iattr(parent->dv_cfdriver, ifattr)); 711 712 m.fn = NULL; 713 m.fn_loc = fn; 714 m.parent = parent; 715 m.ldesc = ldesc; 716 m.aux = aux; 717 m.match = NULL; 718 m.pri = 0; 719 720 TAILQ_FOREACH(ct, &allcftables, ct_list) { 721 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 722 723 /* We don't match root nodes here. */ 724 if (!cf->cf_pspec) 725 continue; 726 727 /* 728 * Skip cf if no longer eligible, otherwise scan 729 * through parents for one matching `parent', and 730 * try match function. 731 */ 732 if (cf->cf_fstate == FSTATE_FOUND) 733 continue; 734 if (cf->cf_fstate == FSTATE_DNOTFOUND || 735 cf->cf_fstate == FSTATE_DSTAR) 736 continue; 737 738 /* 739 * If an interface attribute was specified, 740 * consider only children which attach to 741 * that attribute. 742 */ 743 if (ifattr && !STREQ(ifattr, cf->cf_pspec->cfp_iattr)) 744 continue; 745 746 if (cfparent_match(parent, cf->cf_pspec)) 747 mapply(&m, cf); 748 } 749 } 750 return (m.match); 751 } 752 753 /* 754 * Find the given root device. 755 * This is much like config_search, but there is no parent. 756 * Don't bother with multiple cfdata tables; the root node 757 * must always be in the initial table. 758 */ 759 struct cfdata * 760 config_rootsearch(cfmatch_t fn, const char *rootname, void *aux) 761 { 762 struct cfdata *cf; 763 const short *p; 764 struct matchinfo m; 765 766 m.fn = fn; 767 m.fn_loc = NULL; 768 m.parent = ROOT; 769 m.aux = aux; 770 m.match = NULL; 771 m.pri = 0; 772 /* 773 * Look at root entries for matching name. We do not bother 774 * with found-state here since only one root should ever be 775 * searched (and it must be done first). 776 */ 777 for (p = cfroots; *p >= 0; p++) { 778 cf = &cfdata[*p]; 779 if (strcmp(cf->cf_name, rootname) == 0) 780 mapply(&m, cf); 781 } 782 return (m.match); 783 } 784 785 static const char * const msgs[3] = { "", " not configured\n", " unsupported\n" }; 786 787 /* 788 * The given `aux' argument describes a device that has been found 789 * on the given parent, but not necessarily configured. Locate the 790 * configuration data for that device (using the submatch function 791 * provided, or using candidates' cd_match configuration driver 792 * functions) and attach it, and return true. If the device was 793 * not configured, call the given `print' function and return 0. 794 */ 795 struct device * 796 config_found_sm(struct device *parent, void *aux, cfprint_t print, 797 cfmatch_t submatch) 798 { 799 struct cfdata *cf; 800 801 if ((cf = config_search(submatch, parent, aux)) != NULL) 802 return (config_attach(parent, cf, aux, print)); 803 if (print) { 804 if (config_do_twiddle) 805 twiddle(); 806 aprint_normal("%s", msgs[(*print)(aux, parent->dv_xname)]); 807 } 808 return (NULL); 809 } 810 811 /* same as above, with real locators passed */ 812 struct device * 813 config_found_sm_loc(struct device *parent, 814 const char *ifattr, const locdesc_t *ldesc, void *aux, 815 cfprint_t print, cfmatch_loc_t submatch) 816 { 817 struct cfdata *cf; 818 819 if ((cf = config_search_loc(submatch, parent, ifattr, ldesc, aux))) 820 return(config_attach_loc(parent, cf, ldesc, aux, print)); 821 if (print) { 822 if (config_do_twiddle) 823 twiddle(); 824 aprint_normal("%s", msgs[(*print)(aux, parent->dv_xname)]); 825 } 826 return (NULL); 827 } 828 829 /* 830 * As above, but for root devices. 831 */ 832 struct device * 833 config_rootfound(const char *rootname, void *aux) 834 { 835 struct cfdata *cf; 836 837 if ((cf = config_rootsearch((cfmatch_t)NULL, rootname, aux)) != NULL) 838 return (config_attach(ROOT, cf, aux, (cfprint_t)NULL)); 839 aprint_error("root device %s not configured\n", rootname); 840 return (NULL); 841 } 842 843 /* just like sprintf(buf, "%d") except that it works from the end */ 844 static char * 845 number(char *ep, int n) 846 { 847 848 *--ep = 0; 849 while (n >= 10) { 850 *--ep = (n % 10) + '0'; 851 n /= 10; 852 } 853 *--ep = n + '0'; 854 return (ep); 855 } 856 857 /* 858 * Expand the size of the cd_devs array if necessary. 859 */ 860 void 861 config_makeroom(int n, struct cfdriver *cd) 862 { 863 int old, new; 864 void **nsp; 865 866 if (n < cd->cd_ndevs) 867 return; 868 869 /* 870 * Need to expand the array. 871 */ 872 old = cd->cd_ndevs; 873 if (old == 0) 874 new = MINALLOCSIZE / sizeof(void *); 875 else 876 new = old * 2; 877 while (new <= n) 878 new *= 2; 879 cd->cd_ndevs = new; 880 nsp = malloc(new * sizeof(void *), M_DEVBUF, 881 cold ? M_NOWAIT : M_WAITOK); 882 if (nsp == NULL) 883 panic("config_attach: %sing dev array", 884 old != 0 ? "expand" : "creat"); 885 memset(nsp + old, 0, (new - old) * sizeof(void *)); 886 if (old != 0) { 887 memcpy(nsp, cd->cd_devs, old * sizeof(void *)); 888 free(cd->cd_devs, M_DEVBUF); 889 } 890 cd->cd_devs = nsp; 891 } 892 893 /* 894 * Attach a found device. Allocates memory for device variables. 895 */ 896 struct device * 897 config_attach_loc(struct device *parent, struct cfdata *cf, 898 const locdesc_t *ldesc, void *aux, cfprint_t print) 899 { 900 struct device *dev; 901 struct cftable *ct; 902 struct cfdriver *cd; 903 struct cfattach *ca; 904 size_t lname, lunit; 905 const char *xunit; 906 int myunit; 907 char num[10]; 908 909 cd = config_cfdriver_lookup(cf->cf_name); 910 KASSERT(cd != NULL); 911 912 ca = config_cfattach_lookup_cd(cd, cf->cf_atname); 913 KASSERT(ca != NULL); 914 915 if (ca->ca_devsize < sizeof(struct device)) 916 panic("config_attach"); 917 918 #ifndef __BROKEN_CONFIG_UNIT_USAGE 919 if (cf->cf_fstate == FSTATE_STAR) { 920 for (myunit = cf->cf_unit; myunit < cd->cd_ndevs; myunit++) 921 if (cd->cd_devs[myunit] == NULL) 922 break; 923 /* 924 * myunit is now the unit of the first NULL device pointer, 925 * or max(cd->cd_ndevs,cf->cf_unit). 926 */ 927 } else { 928 myunit = cf->cf_unit; 929 KASSERT(cf->cf_fstate == FSTATE_NOTFOUND); 930 cf->cf_fstate = FSTATE_FOUND; 931 } 932 #else 933 myunit = cf->cf_unit; 934 if (cf->cf_fstate == FSTATE_STAR) 935 cf->cf_unit++; 936 else { 937 KASSERT(cf->cf_fstate == FSTATE_NOTFOUND); 938 cf->cf_fstate = FSTATE_FOUND; 939 } 940 #endif /* ! __BROKEN_CONFIG_UNIT_USAGE */ 941 942 /* compute length of name and decimal expansion of unit number */ 943 lname = strlen(cd->cd_name); 944 xunit = number(&num[sizeof(num)], myunit); 945 lunit = &num[sizeof(num)] - xunit; 946 if (lname + lunit > sizeof(dev->dv_xname)) 947 panic("config_attach: device name too long"); 948 949 /* get memory for all device vars */ 950 dev = (struct device *)malloc(ca->ca_devsize, M_DEVBUF, 951 cold ? M_NOWAIT : M_WAITOK); 952 if (!dev) 953 panic("config_attach: memory allocation for device softc failed"); 954 memset(dev, 0, ca->ca_devsize); 955 TAILQ_INSERT_TAIL(&alldevs, dev, dv_list); /* link up */ 956 dev->dv_class = cd->cd_class; 957 dev->dv_cfdata = cf; 958 dev->dv_cfdriver = cd; 959 dev->dv_cfattach = ca; 960 dev->dv_unit = myunit; 961 memcpy(dev->dv_xname, cd->cd_name, lname); 962 memcpy(dev->dv_xname + lname, xunit, lunit); 963 dev->dv_parent = parent; 964 dev->dv_flags = DVF_ACTIVE; /* always initially active */ 965 if (ldesc) { 966 dev->dv_locators = malloc(ldesc->len * sizeof(int), 967 M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 968 memcpy(dev->dv_locators, ldesc->locs, ldesc->len * sizeof(int)); 969 } 970 971 if (config_do_twiddle) 972 twiddle(); 973 else 974 aprint_naive("Found "); 975 /* 976 * We want the next two printfs for normal, verbose, and quiet, 977 * but not silent (in which case, we're twiddling, instead). 978 */ 979 if (parent == ROOT) { 980 aprint_naive("%s (root)", dev->dv_xname); 981 aprint_normal("%s (root)", dev->dv_xname); 982 } else { 983 aprint_naive("%s at %s", dev->dv_xname, parent->dv_xname); 984 aprint_normal("%s at %s", dev->dv_xname, parent->dv_xname); 985 if (print) 986 (void) (*print)(aux, NULL); 987 } 988 989 /* put this device in the devices array */ 990 config_makeroom(dev->dv_unit, cd); 991 if (cd->cd_devs[dev->dv_unit]) 992 panic("config_attach: duplicate %s", dev->dv_xname); 993 cd->cd_devs[dev->dv_unit] = dev; 994 995 /* 996 * Before attaching, clobber any unfound devices that are 997 * otherwise identical. 998 */ 999 TAILQ_FOREACH(ct, &allcftables, ct_list) { 1000 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 1001 if (STREQ(cf->cf_name, cd->cd_name) && 1002 cf->cf_unit == dev->dv_unit) { 1003 if (cf->cf_fstate == FSTATE_NOTFOUND) 1004 cf->cf_fstate = FSTATE_FOUND; 1005 #ifdef __BROKEN_CONFIG_UNIT_USAGE 1006 /* 1007 * Bump the unit number on all starred cfdata 1008 * entries for this device. 1009 */ 1010 if (cf->cf_fstate == FSTATE_STAR) 1011 cf->cf_unit++; 1012 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 1013 } 1014 } 1015 } 1016 #ifdef __HAVE_DEVICE_REGISTER 1017 device_register(dev, aux); 1018 #endif 1019 (*ca->ca_attach)(parent, dev, aux); 1020 config_process_deferred(&deferred_config_queue, dev); 1021 return (dev); 1022 } 1023 1024 /* 1025 * As above, but for pseudo-devices. Pseudo-devices attached in this 1026 * way are silently inserted into the device tree, and their children 1027 * attached. 1028 * 1029 * Note that because pseudo-devices are attached silently, any information 1030 * the attach routine wishes to print should be prefixed with the device 1031 * name by the attach routine. 1032 */ 1033 struct device * 1034 config_attach_pseudo(struct cfdata *cf) 1035 { 1036 struct device *dev; 1037 struct cfdriver *cd; 1038 struct cfattach *ca; 1039 size_t lname, lunit; 1040 const char *xunit; 1041 int myunit; 1042 char num[10]; 1043 1044 cd = config_cfdriver_lookup(cf->cf_name); 1045 if (cd == NULL) 1046 return (NULL); 1047 1048 ca = config_cfattach_lookup_cd(cd, cf->cf_atname); 1049 if (ca == NULL) 1050 return (NULL); 1051 1052 if (ca->ca_devsize < sizeof(struct device)) 1053 panic("config_attach_pseudo"); 1054 1055 /* 1056 * We just ignore cf_fstate, instead doing everything with 1057 * cf_unit. 1058 * 1059 * XXX Should we change this and use FSTATE_NOTFOUND and 1060 * XXX FSTATE_STAR? 1061 */ 1062 1063 if (cf->cf_unit == DVUNIT_ANY) { 1064 for (myunit = 0; myunit < cd->cd_ndevs; myunit++) 1065 if (cd->cd_devs[myunit] == NULL) 1066 break; 1067 /* 1068 * myunit is now the unit of the first NULL device pointer. 1069 */ 1070 } else { 1071 myunit = cf->cf_unit; 1072 if (myunit < cd->cd_ndevs && cd->cd_devs[myunit] != NULL) 1073 return (NULL); 1074 } 1075 1076 /* compute length of name and decimal expansion of unit number */ 1077 lname = strlen(cd->cd_name); 1078 xunit = number(&num[sizeof(num)], myunit); 1079 lunit = &num[sizeof(num)] - xunit; 1080 if (lname + lunit > sizeof(dev->dv_xname)) 1081 panic("config_attach_pseudo: device name too long"); 1082 1083 /* get memory for all device vars */ 1084 dev = (struct device *)malloc(ca->ca_devsize, M_DEVBUF, 1085 cold ? M_NOWAIT : M_WAITOK); 1086 if (!dev) 1087 panic("config_attach_pseudo: memory allocation for device " 1088 "softc failed"); 1089 memset(dev, 0, ca->ca_devsize); 1090 TAILQ_INSERT_TAIL(&alldevs, dev, dv_list); /* link up */ 1091 dev->dv_class = cd->cd_class; 1092 dev->dv_cfdata = cf; 1093 dev->dv_cfdriver = cd; 1094 dev->dv_cfattach = ca; 1095 dev->dv_unit = myunit; 1096 memcpy(dev->dv_xname, cd->cd_name, lname); 1097 memcpy(dev->dv_xname + lname, xunit, lunit); 1098 dev->dv_parent = ROOT; 1099 dev->dv_flags = DVF_ACTIVE; /* always initially active */ 1100 1101 /* put this device in the devices array */ 1102 config_makeroom(dev->dv_unit, cd); 1103 if (cd->cd_devs[dev->dv_unit]) 1104 panic("config_attach_pseudo: duplicate %s", dev->dv_xname); 1105 cd->cd_devs[dev->dv_unit] = dev; 1106 1107 #if 0 /* XXXJRT not yet */ 1108 #ifdef __HAVE_DEVICE_REGISTER 1109 device_register(dev, NULL); /* like a root node */ 1110 #endif 1111 #endif 1112 (*ca->ca_attach)(ROOT, dev, NULL); 1113 config_process_deferred(&deferred_config_queue, dev); 1114 return (dev); 1115 } 1116 1117 /* 1118 * Detach a device. Optionally forced (e.g. because of hardware 1119 * removal) and quiet. Returns zero if successful, non-zero 1120 * (an error code) otherwise. 1121 * 1122 * Note that this code wants to be run from a process context, so 1123 * that the detach can sleep to allow processes which have a device 1124 * open to run and unwind their stacks. 1125 */ 1126 int 1127 config_detach(struct device *dev, int flags) 1128 { 1129 struct cftable *ct; 1130 struct cfdata *cf; 1131 const struct cfattach *ca; 1132 struct cfdriver *cd; 1133 #ifdef DIAGNOSTIC 1134 struct device *d; 1135 #endif 1136 int rv = 0, i; 1137 1138 #ifdef DIAGNOSTIC 1139 if (dev->dv_cfdata != NULL && 1140 dev->dv_cfdata->cf_fstate != FSTATE_FOUND && 1141 dev->dv_cfdata->cf_fstate != FSTATE_STAR) 1142 panic("config_detach: bad device fstate"); 1143 #endif 1144 cd = dev->dv_cfdriver; 1145 KASSERT(cd != NULL); 1146 1147 ca = dev->dv_cfattach; 1148 KASSERT(ca != NULL); 1149 1150 /* 1151 * Ensure the device is deactivated. If the device doesn't 1152 * have an activation entry point, we allow DVF_ACTIVE to 1153 * remain set. Otherwise, if DVF_ACTIVE is still set, the 1154 * device is busy, and the detach fails. 1155 */ 1156 if (ca->ca_activate != NULL) 1157 rv = config_deactivate(dev); 1158 1159 /* 1160 * Try to detach the device. If that's not possible, then 1161 * we either panic() (for the forced but failed case), or 1162 * return an error. 1163 */ 1164 if (rv == 0) { 1165 if (ca->ca_detach != NULL) 1166 rv = (*ca->ca_detach)(dev, flags); 1167 else 1168 rv = EOPNOTSUPP; 1169 } 1170 if (rv != 0) { 1171 if ((flags & DETACH_FORCE) == 0) 1172 return (rv); 1173 else 1174 panic("config_detach: forced detach of %s failed (%d)", 1175 dev->dv_xname, rv); 1176 } 1177 1178 /* 1179 * The device has now been successfully detached. 1180 */ 1181 1182 #ifdef DIAGNOSTIC 1183 /* 1184 * Sanity: If you're successfully detached, you should have no 1185 * children. (Note that because children must be attached 1186 * after parents, we only need to search the latter part of 1187 * the list.) 1188 */ 1189 for (d = TAILQ_NEXT(dev, dv_list); d != NULL; 1190 d = TAILQ_NEXT(d, dv_list)) { 1191 if (d->dv_parent == dev) { 1192 printf("config_detach: detached device %s" 1193 " has children %s\n", dev->dv_xname, d->dv_xname); 1194 panic("config_detach"); 1195 } 1196 } 1197 #endif 1198 1199 /* notify the parent that the child is gone */ 1200 if (dev->dv_parent) { 1201 struct device *p = dev->dv_parent; 1202 if (p->dv_cfattach->ca_childdetached) 1203 (*p->dv_cfattach->ca_childdetached)(p, dev); 1204 } 1205 1206 /* 1207 * Mark cfdata to show that the unit can be reused, if possible. 1208 */ 1209 TAILQ_FOREACH(ct, &allcftables, ct_list) { 1210 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 1211 if (STREQ(cf->cf_name, cd->cd_name)) { 1212 if (cf->cf_fstate == FSTATE_FOUND && 1213 cf->cf_unit == dev->dv_unit) 1214 cf->cf_fstate = FSTATE_NOTFOUND; 1215 #ifdef __BROKEN_CONFIG_UNIT_USAGE 1216 /* 1217 * Note that we can only re-use a starred 1218 * unit number if the unit being detached 1219 * had the last assigned unit number. 1220 */ 1221 if (cf->cf_fstate == FSTATE_STAR && 1222 cf->cf_unit == dev->dv_unit + 1) 1223 cf->cf_unit--; 1224 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 1225 } 1226 } 1227 } 1228 1229 /* 1230 * Unlink from device list. 1231 */ 1232 TAILQ_REMOVE(&alldevs, dev, dv_list); 1233 1234 /* 1235 * Remove from cfdriver's array, tell the world (unless it was 1236 * a pseudo-device), and free softc. 1237 */ 1238 cd->cd_devs[dev->dv_unit] = NULL; 1239 if (dev->dv_cfdata != NULL && (flags & DETACH_QUIET) == 0) 1240 aprint_normal("%s detached\n", dev->dv_xname); 1241 if (dev->dv_locators) 1242 free(dev->dv_locators, M_DEVBUF); 1243 free(dev, M_DEVBUF); 1244 1245 /* 1246 * If the device now has no units in use, deallocate its softc array. 1247 */ 1248 for (i = 0; i < cd->cd_ndevs; i++) 1249 if (cd->cd_devs[i] != NULL) 1250 break; 1251 if (i == cd->cd_ndevs) { /* nothing found; deallocate */ 1252 free(cd->cd_devs, M_DEVBUF); 1253 cd->cd_devs = NULL; 1254 cd->cd_ndevs = 0; 1255 } 1256 1257 /* 1258 * Return success. 1259 */ 1260 return (0); 1261 } 1262 1263 int 1264 config_activate(struct device *dev) 1265 { 1266 const struct cfattach *ca = dev->dv_cfattach; 1267 int rv = 0, oflags = dev->dv_flags; 1268 1269 if (ca->ca_activate == NULL) 1270 return (EOPNOTSUPP); 1271 1272 if ((dev->dv_flags & DVF_ACTIVE) == 0) { 1273 dev->dv_flags |= DVF_ACTIVE; 1274 rv = (*ca->ca_activate)(dev, DVACT_ACTIVATE); 1275 if (rv) 1276 dev->dv_flags = oflags; 1277 } 1278 return (rv); 1279 } 1280 1281 int 1282 config_deactivate(struct device *dev) 1283 { 1284 const struct cfattach *ca = dev->dv_cfattach; 1285 int rv = 0, oflags = dev->dv_flags; 1286 1287 if (ca->ca_activate == NULL) 1288 return (EOPNOTSUPP); 1289 1290 if (dev->dv_flags & DVF_ACTIVE) { 1291 dev->dv_flags &= ~DVF_ACTIVE; 1292 rv = (*ca->ca_activate)(dev, DVACT_DEACTIVATE); 1293 if (rv) 1294 dev->dv_flags = oflags; 1295 } 1296 return (rv); 1297 } 1298 1299 /* 1300 * Defer the configuration of the specified device until all 1301 * of its parent's devices have been attached. 1302 */ 1303 void 1304 config_defer(struct device *dev, void (*func)(struct device *)) 1305 { 1306 struct deferred_config *dc; 1307 1308 if (dev->dv_parent == NULL) 1309 panic("config_defer: can't defer config of a root device"); 1310 1311 #ifdef DIAGNOSTIC 1312 for (dc = TAILQ_FIRST(&deferred_config_queue); dc != NULL; 1313 dc = TAILQ_NEXT(dc, dc_queue)) { 1314 if (dc->dc_dev == dev) 1315 panic("config_defer: deferred twice"); 1316 } 1317 #endif 1318 1319 dc = malloc(sizeof(*dc), M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 1320 if (dc == NULL) 1321 panic("config_defer: unable to allocate callback"); 1322 1323 dc->dc_dev = dev; 1324 dc->dc_func = func; 1325 TAILQ_INSERT_TAIL(&deferred_config_queue, dc, dc_queue); 1326 config_pending_incr(); 1327 } 1328 1329 /* 1330 * Defer some autoconfiguration for a device until after interrupts 1331 * are enabled. 1332 */ 1333 void 1334 config_interrupts(struct device *dev, void (*func)(struct device *)) 1335 { 1336 struct deferred_config *dc; 1337 1338 /* 1339 * If interrupts are enabled, callback now. 1340 */ 1341 if (cold == 0) { 1342 (*func)(dev); 1343 return; 1344 } 1345 1346 #ifdef DIAGNOSTIC 1347 for (dc = TAILQ_FIRST(&interrupt_config_queue); dc != NULL; 1348 dc = TAILQ_NEXT(dc, dc_queue)) { 1349 if (dc->dc_dev == dev) 1350 panic("config_interrupts: deferred twice"); 1351 } 1352 #endif 1353 1354 dc = malloc(sizeof(*dc), M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 1355 if (dc == NULL) 1356 panic("config_interrupts: unable to allocate callback"); 1357 1358 dc->dc_dev = dev; 1359 dc->dc_func = func; 1360 TAILQ_INSERT_TAIL(&interrupt_config_queue, dc, dc_queue); 1361 config_pending_incr(); 1362 } 1363 1364 /* 1365 * Process a deferred configuration queue. 1366 */ 1367 static void 1368 config_process_deferred(struct deferred_config_head *queue, 1369 struct device *parent) 1370 { 1371 struct deferred_config *dc, *ndc; 1372 1373 for (dc = TAILQ_FIRST(queue); dc != NULL; dc = ndc) { 1374 ndc = TAILQ_NEXT(dc, dc_queue); 1375 if (parent == NULL || dc->dc_dev->dv_parent == parent) { 1376 TAILQ_REMOVE(queue, dc, dc_queue); 1377 (*dc->dc_func)(dc->dc_dev); 1378 free(dc, M_DEVBUF); 1379 config_pending_decr(); 1380 } 1381 } 1382 } 1383 1384 /* 1385 * Manipulate the config_pending semaphore. 1386 */ 1387 void 1388 config_pending_incr(void) 1389 { 1390 1391 config_pending++; 1392 } 1393 1394 void 1395 config_pending_decr(void) 1396 { 1397 1398 #ifdef DIAGNOSTIC 1399 if (config_pending == 0) 1400 panic("config_pending_decr: config_pending == 0"); 1401 #endif 1402 config_pending--; 1403 if (config_pending == 0) 1404 wakeup((void *)&config_pending); 1405 } 1406 1407 /* 1408 * Register a "finalization" routine. Finalization routines are 1409 * called iteratively once all real devices have been found during 1410 * autoconfiguration, for as long as any one finalizer has done 1411 * any work. 1412 */ 1413 int 1414 config_finalize_register(struct device *dev, int (*fn)(struct device *)) 1415 { 1416 struct finalize_hook *f; 1417 1418 /* 1419 * If finalization has already been done, invoke the 1420 * callback function now. 1421 */ 1422 if (config_finalize_done) { 1423 while ((*fn)(dev) != 0) 1424 /* loop */ ; 1425 } 1426 1427 /* Ensure this isn't already on the list. */ 1428 TAILQ_FOREACH(f, &config_finalize_list, f_list) { 1429 if (f->f_func == fn && f->f_dev == dev) 1430 return (EEXIST); 1431 } 1432 1433 f = malloc(sizeof(*f), M_TEMP, M_WAITOK); 1434 f->f_func = fn; 1435 f->f_dev = dev; 1436 TAILQ_INSERT_TAIL(&config_finalize_list, f, f_list); 1437 1438 return (0); 1439 } 1440 1441 void 1442 config_finalize(void) 1443 { 1444 struct finalize_hook *f; 1445 int rv; 1446 1447 /* Run the hooks until none of them does any work. */ 1448 do { 1449 rv = 0; 1450 TAILQ_FOREACH(f, &config_finalize_list, f_list) 1451 rv |= (*f->f_func)(f->f_dev); 1452 } while (rv != 0); 1453 1454 config_finalize_done = 1; 1455 1456 /* Now free all the hooks. */ 1457 while ((f = TAILQ_FIRST(&config_finalize_list)) != NULL) { 1458 TAILQ_REMOVE(&config_finalize_list, f, f_list); 1459 free(f, M_TEMP); 1460 } 1461 } 1462 1463