1 /* $NetBSD: subr_autoconf.c,v 1.125 2007/12/09 21:11:57 jmcneill 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 1.125 2007/12/09 21:11:57 jmcneill Exp $"); 81 82 #include "opt_multiprocessor.h" 83 #include "opt_ddb.h" 84 85 #include <sys/param.h> 86 #include <sys/device.h> 87 #include <sys/disklabel.h> 88 #include <sys/conf.h> 89 #include <sys/kauth.h> 90 #include <sys/malloc.h> 91 #include <sys/systm.h> 92 #include <sys/kernel.h> 93 #include <sys/errno.h> 94 #include <sys/proc.h> 95 #include <sys/reboot.h> 96 97 #include <sys/buf.h> 98 #include <sys/dirent.h> 99 #include <sys/lock.h> 100 #include <sys/vnode.h> 101 #include <sys/mount.h> 102 #include <sys/namei.h> 103 #include <sys/unistd.h> 104 #include <sys/fcntl.h> 105 #include <sys/lockf.h> 106 #include <sys/callout.h> 107 108 #include <sys/disk.h> 109 110 #include <machine/limits.h> 111 112 #include "opt_userconf.h" 113 #ifdef USERCONF 114 #include <sys/userconf.h> 115 #endif 116 117 #ifdef __i386__ 118 #include "opt_splash.h" 119 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_PROGRESS) 120 #include <dev/splash/splash.h> 121 extern struct splash_progress *splash_progress_state; 122 #endif 123 #endif 124 125 /* 126 * Autoconfiguration subroutines. 127 */ 128 129 /* 130 * ioconf.c exports exactly two names: cfdata and cfroots. All system 131 * devices and drivers are found via these tables. 132 */ 133 extern struct cfdata cfdata[]; 134 extern const short cfroots[]; 135 136 /* 137 * List of all cfdriver structures. We use this to detect duplicates 138 * when other cfdrivers are loaded. 139 */ 140 struct cfdriverlist allcfdrivers = LIST_HEAD_INITIALIZER(&allcfdrivers); 141 extern struct cfdriver * const cfdriver_list_initial[]; 142 143 /* 144 * Initial list of cfattach's. 145 */ 146 extern const struct cfattachinit cfattachinit[]; 147 148 /* 149 * List of cfdata tables. We always have one such list -- the one 150 * built statically when the kernel was configured. 151 */ 152 struct cftablelist allcftables = TAILQ_HEAD_INITIALIZER(allcftables); 153 static struct cftable initcftable; 154 155 #define ROOT ((device_t)NULL) 156 157 struct matchinfo { 158 cfsubmatch_t fn; 159 struct device *parent; 160 const int *locs; 161 void *aux; 162 struct cfdata *match; 163 int pri; 164 }; 165 166 static char *number(char *, int); 167 static void mapply(struct matchinfo *, cfdata_t); 168 static device_t config_devalloc(const device_t, const cfdata_t, const int *); 169 static void config_devdealloc(device_t); 170 static void config_makeroom(int, struct cfdriver *); 171 static void config_devlink(device_t); 172 static void config_devunlink(device_t); 173 174 struct deferred_config { 175 TAILQ_ENTRY(deferred_config) dc_queue; 176 device_t dc_dev; 177 void (*dc_func)(device_t); 178 }; 179 180 TAILQ_HEAD(deferred_config_head, deferred_config); 181 182 struct deferred_config_head deferred_config_queue = 183 TAILQ_HEAD_INITIALIZER(deferred_config_queue); 184 struct deferred_config_head interrupt_config_queue = 185 TAILQ_HEAD_INITIALIZER(interrupt_config_queue); 186 187 static void config_process_deferred(struct deferred_config_head *, device_t); 188 189 /* Hooks to finalize configuration once all real devices have been found. */ 190 struct finalize_hook { 191 TAILQ_ENTRY(finalize_hook) f_list; 192 int (*f_func)(device_t); 193 device_t f_dev; 194 }; 195 static TAILQ_HEAD(, finalize_hook) config_finalize_list = 196 TAILQ_HEAD_INITIALIZER(config_finalize_list); 197 static int config_finalize_done; 198 199 /* list of all devices */ 200 struct devicelist alldevs = TAILQ_HEAD_INITIALIZER(alldevs); 201 202 volatile int config_pending; /* semaphore for mountroot */ 203 204 #define STREQ(s1, s2) \ 205 (*(s1) == *(s2) && strcmp((s1), (s2)) == 0) 206 207 static int config_initialized; /* config_init() has been called. */ 208 209 static int config_do_twiddle; 210 211 struct vnode * 212 opendisk(struct device *dv) 213 { 214 int bmajor, bminor; 215 struct vnode *tmpvn; 216 int error; 217 dev_t dev; 218 219 /* 220 * Lookup major number for disk block device. 221 */ 222 bmajor = devsw_name2blk(device_xname(dv), NULL, 0); 223 if (bmajor == -1) 224 return NULL; 225 226 bminor = minor(device_unit(dv)); 227 /* 228 * Fake a temporary vnode for the disk, open it, and read 229 * and hash the sectors. 230 */ 231 dev = device_is_a(dv, "dk") ? makedev(bmajor, bminor) : 232 MAKEDISKDEV(bmajor, bminor, RAW_PART); 233 if (bdevvp(dev, &tmpvn)) 234 panic("%s: can't alloc vnode for %s", __func__, 235 device_xname(dv)); 236 error = VOP_OPEN(tmpvn, FREAD, NOCRED); 237 if (error) { 238 #ifndef DEBUG 239 /* 240 * Ignore errors caused by missing device, partition, 241 * or medium. 242 */ 243 if (error != ENXIO && error != ENODEV) 244 #endif 245 printf("%s: can't open dev %s (%d)\n", 246 __func__, device_xname(dv), error); 247 vput(tmpvn); 248 return NULL; 249 } 250 251 return tmpvn; 252 } 253 254 int 255 config_handle_wedges(struct device *dv, int par) 256 { 257 struct dkwedge_list wl; 258 struct dkwedge_info *wi; 259 struct vnode *vn; 260 char diskname[16]; 261 int i, error; 262 263 if ((vn = opendisk(dv)) == NULL) 264 return -1; 265 266 wl.dkwl_bufsize = sizeof(*wi) * 16; 267 wl.dkwl_buf = wi = malloc(wl.dkwl_bufsize, M_TEMP, M_WAITOK); 268 269 error = VOP_IOCTL(vn, DIOCLWEDGES, &wl, FREAD, NOCRED); 270 VOP_CLOSE(vn, FREAD, NOCRED); 271 vput(vn); 272 if (error) { 273 #ifdef DEBUG_WEDGE 274 printf("%s: List wedges returned %d\n", 275 device_xname(dv), error); 276 #endif 277 free(wi, M_TEMP); 278 return -1; 279 } 280 281 #ifdef DEBUG_WEDGE 282 printf("%s: Returned %u(%u) wedges\n", device_xname(dv), 283 wl.dkwl_nwedges, wl.dkwl_ncopied); 284 #endif 285 snprintf(diskname, sizeof(diskname), "%s%c", device_xname(dv), 286 par + 'a'); 287 288 for (i = 0; i < wl.dkwl_ncopied; i++) { 289 #ifdef DEBUG_WEDGE 290 printf("%s: Looking for %s in %s\n", 291 device_xname(dv), diskname, wi[i].dkw_wname); 292 #endif 293 if (strcmp(wi[i].dkw_wname, diskname) == 0) 294 break; 295 } 296 297 if (i == wl.dkwl_ncopied) { 298 #ifdef DEBUG_WEDGE 299 printf("%s: Cannot find wedge with parent %s\n", 300 device_xname(dv), diskname); 301 #endif 302 free(wi, M_TEMP); 303 return -1; 304 } 305 306 #ifdef DEBUG_WEDGE 307 printf("%s: Setting boot wedge %s (%s) at %llu %llu\n", 308 device_xname(dv), wi[i].dkw_devname, wi[i].dkw_wname, 309 (unsigned long long)wi[i].dkw_offset, 310 (unsigned long long)wi[i].dkw_size); 311 #endif 312 dkwedge_set_bootwedge(dv, wi[i].dkw_offset, wi[i].dkw_size); 313 free(wi, M_TEMP); 314 return 0; 315 } 316 317 /* 318 * Initialize the autoconfiguration data structures. Normally this 319 * is done by configure(), but some platforms need to do this very 320 * early (to e.g. initialize the console). 321 */ 322 void 323 config_init(void) 324 { 325 const struct cfattachinit *cfai; 326 int i, j; 327 328 if (config_initialized) 329 return; 330 331 /* allcfdrivers is statically initialized. */ 332 for (i = 0; cfdriver_list_initial[i] != NULL; i++) { 333 if (config_cfdriver_attach(cfdriver_list_initial[i]) != 0) 334 panic("configure: duplicate `%s' drivers", 335 cfdriver_list_initial[i]->cd_name); 336 } 337 338 for (cfai = &cfattachinit[0]; cfai->cfai_name != NULL; cfai++) { 339 for (j = 0; cfai->cfai_list[j] != NULL; j++) { 340 if (config_cfattach_attach(cfai->cfai_name, 341 cfai->cfai_list[j]) != 0) 342 panic("configure: duplicate `%s' attachment " 343 "of `%s' driver", 344 cfai->cfai_list[j]->ca_name, 345 cfai->cfai_name); 346 } 347 } 348 349 initcftable.ct_cfdata = cfdata; 350 TAILQ_INSERT_TAIL(&allcftables, &initcftable, ct_list); 351 352 config_initialized = 1; 353 } 354 355 /* 356 * Configure the system's hardware. 357 */ 358 void 359 configure(void) 360 { 361 int errcnt; 362 363 /* Initialize data structures. */ 364 config_init(); 365 pmf_init(); 366 367 #ifdef USERCONF 368 if (boothowto & RB_USERCONF) 369 user_config(); 370 #endif 371 372 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 373 config_do_twiddle = 1; 374 printf_nolog("Detecting hardware..."); 375 } 376 377 /* 378 * Do the machine-dependent portion of autoconfiguration. This 379 * sets the configuration machinery here in motion by "finding" 380 * the root bus. When this function returns, we expect interrupts 381 * to be enabled. 382 */ 383 cpu_configure(); 384 385 /* Initialize callouts, part 2. */ 386 callout_startup2(); 387 388 /* 389 * Now that we've found all the hardware, start the real time 390 * and statistics clocks. 391 */ 392 initclocks(); 393 394 cold = 0; /* clocks are running, we're warm now! */ 395 396 #if defined(MULTIPROCESSOR) 397 /* Boot the secondary processors. */ 398 cpu_boot_secondary_processors(); 399 #endif 400 401 /* 402 * Now callback to finish configuration for devices which want 403 * to do this once interrupts are enabled. 404 */ 405 config_process_deferred(&interrupt_config_queue, NULL); 406 407 errcnt = aprint_get_error_count(); 408 if ((boothowto & (AB_QUIET|AB_SILENT)) != 0 && 409 (boothowto & AB_VERBOSE) == 0) { 410 if (config_do_twiddle) { 411 config_do_twiddle = 0; 412 printf_nolog("done.\n"); 413 } 414 if (errcnt != 0) { 415 printf("WARNING: %d error%s while detecting hardware; " 416 "check system log.\n", errcnt, 417 errcnt == 1 ? "" : "s"); 418 } 419 } 420 } 421 422 /* 423 * Add a cfdriver to the system. 424 */ 425 int 426 config_cfdriver_attach(struct cfdriver *cd) 427 { 428 struct cfdriver *lcd; 429 430 /* Make sure this driver isn't already in the system. */ 431 LIST_FOREACH(lcd, &allcfdrivers, cd_list) { 432 if (STREQ(lcd->cd_name, cd->cd_name)) 433 return (EEXIST); 434 } 435 436 LIST_INIT(&cd->cd_attach); 437 LIST_INSERT_HEAD(&allcfdrivers, cd, cd_list); 438 439 return (0); 440 } 441 442 /* 443 * Remove a cfdriver from the system. 444 */ 445 int 446 config_cfdriver_detach(struct cfdriver *cd) 447 { 448 int i; 449 450 /* Make sure there are no active instances. */ 451 for (i = 0; i < cd->cd_ndevs; i++) { 452 if (cd->cd_devs[i] != NULL) 453 return (EBUSY); 454 } 455 456 /* ...and no attachments loaded. */ 457 if (LIST_EMPTY(&cd->cd_attach) == 0) 458 return (EBUSY); 459 460 LIST_REMOVE(cd, cd_list); 461 462 KASSERT(cd->cd_devs == NULL); 463 464 return (0); 465 } 466 467 /* 468 * Look up a cfdriver by name. 469 */ 470 struct cfdriver * 471 config_cfdriver_lookup(const char *name) 472 { 473 struct cfdriver *cd; 474 475 LIST_FOREACH(cd, &allcfdrivers, cd_list) { 476 if (STREQ(cd->cd_name, name)) 477 return (cd); 478 } 479 480 return (NULL); 481 } 482 483 /* 484 * Add a cfattach to the specified driver. 485 */ 486 int 487 config_cfattach_attach(const char *driver, struct cfattach *ca) 488 { 489 struct cfattach *lca; 490 struct cfdriver *cd; 491 492 cd = config_cfdriver_lookup(driver); 493 if (cd == NULL) 494 return (ESRCH); 495 496 /* Make sure this attachment isn't already on this driver. */ 497 LIST_FOREACH(lca, &cd->cd_attach, ca_list) { 498 if (STREQ(lca->ca_name, ca->ca_name)) 499 return (EEXIST); 500 } 501 502 LIST_INSERT_HEAD(&cd->cd_attach, ca, ca_list); 503 504 return (0); 505 } 506 507 /* 508 * Remove a cfattach from the specified driver. 509 */ 510 int 511 config_cfattach_detach(const char *driver, struct cfattach *ca) 512 { 513 struct cfdriver *cd; 514 device_t dev; 515 int i; 516 517 cd = config_cfdriver_lookup(driver); 518 if (cd == NULL) 519 return (ESRCH); 520 521 /* Make sure there are no active instances. */ 522 for (i = 0; i < cd->cd_ndevs; i++) { 523 if ((dev = cd->cd_devs[i]) == NULL) 524 continue; 525 if (dev->dv_cfattach == ca) 526 return (EBUSY); 527 } 528 529 LIST_REMOVE(ca, ca_list); 530 531 return (0); 532 } 533 534 /* 535 * Look up a cfattach by name. 536 */ 537 static struct cfattach * 538 config_cfattach_lookup_cd(struct cfdriver *cd, const char *atname) 539 { 540 struct cfattach *ca; 541 542 LIST_FOREACH(ca, &cd->cd_attach, ca_list) { 543 if (STREQ(ca->ca_name, atname)) 544 return (ca); 545 } 546 547 return (NULL); 548 } 549 550 /* 551 * Look up a cfattach by driver/attachment name. 552 */ 553 struct cfattach * 554 config_cfattach_lookup(const char *name, const char *atname) 555 { 556 struct cfdriver *cd; 557 558 cd = config_cfdriver_lookup(name); 559 if (cd == NULL) 560 return (NULL); 561 562 return (config_cfattach_lookup_cd(cd, atname)); 563 } 564 565 /* 566 * Apply the matching function and choose the best. This is used 567 * a few times and we want to keep the code small. 568 */ 569 static void 570 mapply(struct matchinfo *m, cfdata_t cf) 571 { 572 int pri; 573 574 if (m->fn != NULL) { 575 pri = (*m->fn)(m->parent, cf, m->locs, m->aux); 576 } else { 577 pri = config_match(m->parent, cf, m->aux); 578 } 579 if (pri > m->pri) { 580 m->match = cf; 581 m->pri = pri; 582 } 583 } 584 585 int 586 config_stdsubmatch(device_t parent, cfdata_t cf, const int *locs, void *aux) 587 { 588 const struct cfiattrdata *ci; 589 const struct cflocdesc *cl; 590 int nlocs, i; 591 592 ci = cfiattr_lookup(cf->cf_pspec->cfp_iattr, parent->dv_cfdriver); 593 KASSERT(ci); 594 nlocs = ci->ci_loclen; 595 for (i = 0; i < nlocs; i++) { 596 cl = &ci->ci_locdesc[i]; 597 /* !cld_defaultstr means no default value */ 598 if ((!(cl->cld_defaultstr) 599 || (cf->cf_loc[i] != cl->cld_default)) 600 && cf->cf_loc[i] != locs[i]) 601 return (0); 602 } 603 604 return (config_match(parent, cf, aux)); 605 } 606 607 /* 608 * Helper function: check whether the driver supports the interface attribute 609 * and return its descriptor structure. 610 */ 611 static const struct cfiattrdata * 612 cfdriver_get_iattr(const struct cfdriver *cd, const char *ia) 613 { 614 const struct cfiattrdata * const *cpp; 615 616 if (cd->cd_attrs == NULL) 617 return (0); 618 619 for (cpp = cd->cd_attrs; *cpp; cpp++) { 620 if (STREQ((*cpp)->ci_name, ia)) { 621 /* Match. */ 622 return (*cpp); 623 } 624 } 625 return (0); 626 } 627 628 /* 629 * Lookup an interface attribute description by name. 630 * If the driver is given, consider only its supported attributes. 631 */ 632 const struct cfiattrdata * 633 cfiattr_lookup(const char *name, const struct cfdriver *cd) 634 { 635 const struct cfdriver *d; 636 const struct cfiattrdata *ia; 637 638 if (cd) 639 return (cfdriver_get_iattr(cd, name)); 640 641 LIST_FOREACH(d, &allcfdrivers, cd_list) { 642 ia = cfdriver_get_iattr(d, name); 643 if (ia) 644 return (ia); 645 } 646 return (0); 647 } 648 649 /* 650 * Determine if `parent' is a potential parent for a device spec based 651 * on `cfp'. 652 */ 653 static int 654 cfparent_match(const device_t parent, const struct cfparent *cfp) 655 { 656 struct cfdriver *pcd; 657 658 /* We don't match root nodes here. */ 659 if (cfp == NULL) 660 return (0); 661 662 pcd = parent->dv_cfdriver; 663 KASSERT(pcd != NULL); 664 665 /* 666 * First, ensure this parent has the correct interface 667 * attribute. 668 */ 669 if (!cfdriver_get_iattr(pcd, cfp->cfp_iattr)) 670 return (0); 671 672 /* 673 * If no specific parent device instance was specified (i.e. 674 * we're attaching to the attribute only), we're done! 675 */ 676 if (cfp->cfp_parent == NULL) 677 return (1); 678 679 /* 680 * Check the parent device's name. 681 */ 682 if (STREQ(pcd->cd_name, cfp->cfp_parent) == 0) 683 return (0); /* not the same parent */ 684 685 /* 686 * Make sure the unit number matches. 687 */ 688 if (cfp->cfp_unit == DVUNIT_ANY || /* wildcard */ 689 cfp->cfp_unit == parent->dv_unit) 690 return (1); 691 692 /* Unit numbers don't match. */ 693 return (0); 694 } 695 696 /* 697 * Helper for config_cfdata_attach(): check all devices whether it could be 698 * parent any attachment in the config data table passed, and rescan. 699 */ 700 static void 701 rescan_with_cfdata(const struct cfdata *cf) 702 { 703 device_t d; 704 const struct cfdata *cf1; 705 706 /* 707 * "alldevs" is likely longer than an LKM's cfdata, so make it 708 * the outer loop. 709 */ 710 TAILQ_FOREACH(d, &alldevs, dv_list) { 711 712 if (!(d->dv_cfattach->ca_rescan)) 713 continue; 714 715 for (cf1 = cf; cf1->cf_name; cf1++) { 716 717 if (!cfparent_match(d, cf1->cf_pspec)) 718 continue; 719 720 (*d->dv_cfattach->ca_rescan)(d, 721 cf1->cf_pspec->cfp_iattr, cf1->cf_loc); 722 } 723 } 724 } 725 726 /* 727 * Attach a supplemental config data table and rescan potential 728 * parent devices if required. 729 */ 730 int 731 config_cfdata_attach(cfdata_t cf, int scannow) 732 { 733 struct cftable *ct; 734 735 ct = malloc(sizeof(struct cftable), M_DEVBUF, M_WAITOK); 736 ct->ct_cfdata = cf; 737 TAILQ_INSERT_TAIL(&allcftables, ct, ct_list); 738 739 if (scannow) 740 rescan_with_cfdata(cf); 741 742 return (0); 743 } 744 745 /* 746 * Helper for config_cfdata_detach: check whether a device is 747 * found through any attachment in the config data table. 748 */ 749 static int 750 dev_in_cfdata(const struct device *d, const struct cfdata *cf) 751 { 752 const struct cfdata *cf1; 753 754 for (cf1 = cf; cf1->cf_name; cf1++) 755 if (d->dv_cfdata == cf1) 756 return (1); 757 758 return (0); 759 } 760 761 /* 762 * Detach a supplemental config data table. Detach all devices found 763 * through that table (and thus keeping references to it) before. 764 */ 765 int 766 config_cfdata_detach(cfdata_t cf) 767 { 768 device_t d; 769 int error; 770 struct cftable *ct; 771 772 again: 773 TAILQ_FOREACH(d, &alldevs, dv_list) { 774 if (dev_in_cfdata(d, cf)) { 775 error = config_detach(d, 0); 776 if (error) { 777 aprint_error("%s: unable to detach instance\n", 778 d->dv_xname); 779 return (error); 780 } 781 goto again; 782 } 783 } 784 785 TAILQ_FOREACH(ct, &allcftables, ct_list) { 786 if (ct->ct_cfdata == cf) { 787 TAILQ_REMOVE(&allcftables, ct, ct_list); 788 free(ct, M_DEVBUF); 789 return (0); 790 } 791 } 792 793 /* not found -- shouldn't happen */ 794 return (EINVAL); 795 } 796 797 /* 798 * Invoke the "match" routine for a cfdata entry on behalf of 799 * an external caller, usually a "submatch" routine. 800 */ 801 int 802 config_match(device_t parent, cfdata_t cf, void *aux) 803 { 804 struct cfattach *ca; 805 806 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname); 807 if (ca == NULL) { 808 /* No attachment for this entry, oh well. */ 809 return (0); 810 } 811 812 return ((*ca->ca_match)(parent, cf, aux)); 813 } 814 815 /* 816 * Iterate over all potential children of some device, calling the given 817 * function (default being the child's match function) for each one. 818 * Nonzero returns are matches; the highest value returned is considered 819 * the best match. Return the `found child' if we got a match, or NULL 820 * otherwise. The `aux' pointer is simply passed on through. 821 * 822 * Note that this function is designed so that it can be used to apply 823 * an arbitrary function to all potential children (its return value 824 * can be ignored). 825 */ 826 cfdata_t 827 config_search_loc(cfsubmatch_t fn, device_t parent, 828 const char *ifattr, const int *locs, void *aux) 829 { 830 struct cftable *ct; 831 cfdata_t cf; 832 struct matchinfo m; 833 834 KASSERT(config_initialized); 835 KASSERT(!ifattr || cfdriver_get_iattr(parent->dv_cfdriver, ifattr)); 836 837 m.fn = fn; 838 m.parent = parent; 839 m.locs = locs; 840 m.aux = aux; 841 m.match = NULL; 842 m.pri = 0; 843 844 TAILQ_FOREACH(ct, &allcftables, ct_list) { 845 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 846 847 /* We don't match root nodes here. */ 848 if (!cf->cf_pspec) 849 continue; 850 851 /* 852 * Skip cf if no longer eligible, otherwise scan 853 * through parents for one matching `parent', and 854 * try match function. 855 */ 856 if (cf->cf_fstate == FSTATE_FOUND) 857 continue; 858 if (cf->cf_fstate == FSTATE_DNOTFOUND || 859 cf->cf_fstate == FSTATE_DSTAR) 860 continue; 861 862 /* 863 * If an interface attribute was specified, 864 * consider only children which attach to 865 * that attribute. 866 */ 867 if (ifattr && !STREQ(ifattr, cf->cf_pspec->cfp_iattr)) 868 continue; 869 870 if (cfparent_match(parent, cf->cf_pspec)) 871 mapply(&m, cf); 872 } 873 } 874 return (m.match); 875 } 876 877 cfdata_t 878 config_search_ia(cfsubmatch_t fn, device_t parent, const char *ifattr, 879 void *aux) 880 { 881 882 return (config_search_loc(fn, parent, ifattr, NULL, aux)); 883 } 884 885 /* 886 * Find the given root device. 887 * This is much like config_search, but there is no parent. 888 * Don't bother with multiple cfdata tables; the root node 889 * must always be in the initial table. 890 */ 891 cfdata_t 892 config_rootsearch(cfsubmatch_t fn, const char *rootname, void *aux) 893 { 894 cfdata_t cf; 895 const short *p; 896 struct matchinfo m; 897 898 m.fn = fn; 899 m.parent = ROOT; 900 m.aux = aux; 901 m.match = NULL; 902 m.pri = 0; 903 m.locs = 0; 904 /* 905 * Look at root entries for matching name. We do not bother 906 * with found-state here since only one root should ever be 907 * searched (and it must be done first). 908 */ 909 for (p = cfroots; *p >= 0; p++) { 910 cf = &cfdata[*p]; 911 if (strcmp(cf->cf_name, rootname) == 0) 912 mapply(&m, cf); 913 } 914 return (m.match); 915 } 916 917 static const char * const msgs[3] = { "", " not configured\n", " unsupported\n" }; 918 919 /* 920 * The given `aux' argument describes a device that has been found 921 * on the given parent, but not necessarily configured. Locate the 922 * configuration data for that device (using the submatch function 923 * provided, or using candidates' cd_match configuration driver 924 * functions) and attach it, and return true. If the device was 925 * not configured, call the given `print' function and return 0. 926 */ 927 device_t 928 config_found_sm_loc(device_t parent, 929 const char *ifattr, const int *locs, void *aux, 930 cfprint_t print, cfsubmatch_t submatch) 931 { 932 cfdata_t cf; 933 934 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_PROGRESS) 935 if (splash_progress_state) 936 splash_progress_update(splash_progress_state); 937 #endif 938 939 if ((cf = config_search_loc(submatch, parent, ifattr, locs, aux))) 940 return(config_attach_loc(parent, cf, locs, aux, print)); 941 if (print) { 942 if (config_do_twiddle) 943 twiddle(); 944 aprint_normal("%s", msgs[(*print)(aux, parent->dv_xname)]); 945 } 946 947 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_PROGRESS) 948 if (splash_progress_state) 949 splash_progress_update(splash_progress_state); 950 #endif 951 952 return (NULL); 953 } 954 955 device_t 956 config_found_ia(device_t parent, const char *ifattr, void *aux, 957 cfprint_t print) 958 { 959 960 return (config_found_sm_loc(parent, ifattr, NULL, aux, print, NULL)); 961 } 962 963 device_t 964 config_found(device_t parent, void *aux, cfprint_t print) 965 { 966 967 return (config_found_sm_loc(parent, NULL, NULL, aux, print, NULL)); 968 } 969 970 /* 971 * As above, but for root devices. 972 */ 973 device_t 974 config_rootfound(const char *rootname, void *aux) 975 { 976 cfdata_t cf; 977 978 if ((cf = config_rootsearch((cfsubmatch_t)NULL, rootname, aux)) != NULL) 979 return (config_attach(ROOT, cf, aux, (cfprint_t)NULL)); 980 aprint_error("root device %s not configured\n", rootname); 981 return (NULL); 982 } 983 984 /* just like sprintf(buf, "%d") except that it works from the end */ 985 static char * 986 number(char *ep, int n) 987 { 988 989 *--ep = 0; 990 while (n >= 10) { 991 *--ep = (n % 10) + '0'; 992 n /= 10; 993 } 994 *--ep = n + '0'; 995 return (ep); 996 } 997 998 /* 999 * Expand the size of the cd_devs array if necessary. 1000 */ 1001 static void 1002 config_makeroom(int n, struct cfdriver *cd) 1003 { 1004 int old, new; 1005 void **nsp; 1006 1007 if (n < cd->cd_ndevs) 1008 return; 1009 1010 /* 1011 * Need to expand the array. 1012 */ 1013 old = cd->cd_ndevs; 1014 if (old == 0) 1015 new = 4; 1016 else 1017 new = old * 2; 1018 while (new <= n) 1019 new *= 2; 1020 cd->cd_ndevs = new; 1021 nsp = malloc(new * sizeof(void *), M_DEVBUF, 1022 cold ? M_NOWAIT : M_WAITOK); 1023 if (nsp == NULL) 1024 panic("config_attach: %sing dev array", 1025 old != 0 ? "expand" : "creat"); 1026 memset(nsp + old, 0, (new - old) * sizeof(void *)); 1027 if (old != 0) { 1028 memcpy(nsp, cd->cd_devs, old * sizeof(void *)); 1029 free(cd->cd_devs, M_DEVBUF); 1030 } 1031 cd->cd_devs = nsp; 1032 } 1033 1034 static void 1035 config_devlink(device_t dev) 1036 { 1037 struct cfdriver *cd = dev->dv_cfdriver; 1038 1039 /* put this device in the devices array */ 1040 config_makeroom(dev->dv_unit, cd); 1041 if (cd->cd_devs[dev->dv_unit]) 1042 panic("config_attach: duplicate %s", dev->dv_xname); 1043 cd->cd_devs[dev->dv_unit] = dev; 1044 1045 TAILQ_INSERT_TAIL(&alldevs, dev, dv_list); /* link up */ 1046 } 1047 1048 static void 1049 config_devunlink(device_t dev) 1050 { 1051 struct cfdriver *cd = dev->dv_cfdriver; 1052 int i; 1053 1054 /* Unlink from device list. */ 1055 TAILQ_REMOVE(&alldevs, dev, dv_list); 1056 1057 /* Remove from cfdriver's array. */ 1058 cd->cd_devs[dev->dv_unit] = NULL; 1059 1060 /* 1061 * If the device now has no units in use, deallocate its softc array. 1062 */ 1063 for (i = 0; i < cd->cd_ndevs; i++) 1064 if (cd->cd_devs[i] != NULL) 1065 break; 1066 if (i == cd->cd_ndevs) { /* nothing found; deallocate */ 1067 free(cd->cd_devs, M_DEVBUF); 1068 cd->cd_devs = NULL; 1069 cd->cd_ndevs = 0; 1070 } 1071 } 1072 1073 static device_t 1074 config_devalloc(const device_t parent, const cfdata_t cf, const int *locs) 1075 { 1076 struct cfdriver *cd; 1077 struct cfattach *ca; 1078 size_t lname, lunit; 1079 const char *xunit; 1080 int myunit; 1081 char num[10]; 1082 device_t dev; 1083 void *dev_private; 1084 const struct cfiattrdata *ia; 1085 1086 cd = config_cfdriver_lookup(cf->cf_name); 1087 if (cd == NULL) 1088 return (NULL); 1089 1090 ca = config_cfattach_lookup_cd(cd, cf->cf_atname); 1091 if (ca == NULL) 1092 return (NULL); 1093 1094 if ((ca->ca_flags & DVF_PRIV_ALLOC) == 0 && 1095 ca->ca_devsize < sizeof(struct device)) 1096 panic("config_devalloc"); 1097 1098 #ifndef __BROKEN_CONFIG_UNIT_USAGE 1099 if (cf->cf_fstate == FSTATE_STAR) { 1100 for (myunit = cf->cf_unit; myunit < cd->cd_ndevs; myunit++) 1101 if (cd->cd_devs[myunit] == NULL) 1102 break; 1103 /* 1104 * myunit is now the unit of the first NULL device pointer, 1105 * or max(cd->cd_ndevs,cf->cf_unit). 1106 */ 1107 } else { 1108 myunit = cf->cf_unit; 1109 if (myunit < cd->cd_ndevs && cd->cd_devs[myunit] != NULL) 1110 return (NULL); 1111 } 1112 #else 1113 myunit = cf->cf_unit; 1114 #endif /* ! __BROKEN_CONFIG_UNIT_USAGE */ 1115 1116 /* compute length of name and decimal expansion of unit number */ 1117 lname = strlen(cd->cd_name); 1118 xunit = number(&num[sizeof(num)], myunit); 1119 lunit = &num[sizeof(num)] - xunit; 1120 if (lname + lunit > sizeof(dev->dv_xname)) 1121 panic("config_devalloc: device name too long"); 1122 1123 /* get memory for all device vars */ 1124 dev_private = malloc(ca->ca_devsize, M_DEVBUF, 1125 M_ZERO | (cold ? M_NOWAIT : M_WAITOK)); 1126 if (dev_private == NULL) 1127 panic("config_devalloc: memory allocation for device softc failed"); 1128 1129 if ((ca->ca_flags & DVF_PRIV_ALLOC) != 0) { 1130 dev = malloc(sizeof(struct device), M_DEVBUF, 1131 M_ZERO | (cold ? M_NOWAIT : M_WAITOK)); 1132 } else { 1133 dev = dev_private; 1134 } 1135 if (dev == NULL) 1136 panic("config_devalloc: memory allocation for device_t failed"); 1137 1138 dev->dv_class = cd->cd_class; 1139 dev->dv_cfdata = cf; 1140 dev->dv_cfdriver = cd; 1141 dev->dv_cfattach = ca; 1142 dev->dv_unit = myunit; 1143 dev->dv_activity_count = 0; 1144 dev->dv_activity_handlers = NULL; 1145 dev->dv_private = dev_private; 1146 memcpy(dev->dv_xname, cd->cd_name, lname); 1147 memcpy(dev->dv_xname + lname, xunit, lunit); 1148 dev->dv_parent = parent; 1149 if (parent != NULL) 1150 dev->dv_depth = parent->dv_depth + 1; 1151 else 1152 dev->dv_depth = 0; 1153 dev->dv_flags = DVF_ACTIVE; /* always initially active */ 1154 dev->dv_flags |= ca->ca_flags; /* inherit flags from class */ 1155 if (locs) { 1156 KASSERT(parent); /* no locators at root */ 1157 ia = cfiattr_lookup(cf->cf_pspec->cfp_iattr, 1158 parent->dv_cfdriver); 1159 dev->dv_locators = malloc(ia->ci_loclen * sizeof(int), 1160 M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 1161 memcpy(dev->dv_locators, locs, ia->ci_loclen * sizeof(int)); 1162 } 1163 dev->dv_properties = prop_dictionary_create(); 1164 KASSERT(dev->dv_properties != NULL); 1165 1166 return (dev); 1167 } 1168 1169 static void 1170 config_devdealloc(device_t dev) 1171 { 1172 1173 KASSERT(dev->dv_properties != NULL); 1174 prop_object_release(dev->dv_properties); 1175 1176 if (dev->dv_activity_handlers) 1177 panic("config_devdealloc with registered handlers"); 1178 1179 if (dev->dv_locators) 1180 free(dev->dv_locators, M_DEVBUF); 1181 1182 if ((dev->dv_flags & DVF_PRIV_ALLOC) != 0) 1183 free(dev->dv_private, M_DEVBUF); 1184 1185 free(dev, M_DEVBUF); 1186 } 1187 1188 /* 1189 * Attach a found device. 1190 */ 1191 device_t 1192 config_attach_loc(device_t parent, cfdata_t cf, 1193 const int *locs, void *aux, cfprint_t print) 1194 { 1195 device_t dev; 1196 struct cftable *ct; 1197 const char *drvname; 1198 1199 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_PROGRESS) 1200 if (splash_progress_state) 1201 splash_progress_update(splash_progress_state); 1202 #endif 1203 1204 dev = config_devalloc(parent, cf, locs); 1205 if (!dev) 1206 panic("config_attach: allocation of device softc failed"); 1207 1208 /* XXX redundant - see below? */ 1209 if (cf->cf_fstate != FSTATE_STAR) { 1210 KASSERT(cf->cf_fstate == FSTATE_NOTFOUND); 1211 cf->cf_fstate = FSTATE_FOUND; 1212 } 1213 #ifdef __BROKEN_CONFIG_UNIT_USAGE 1214 else 1215 cf->cf_unit++; 1216 #endif 1217 1218 config_devlink(dev); 1219 1220 if (config_do_twiddle) 1221 twiddle(); 1222 else 1223 aprint_naive("Found "); 1224 /* 1225 * We want the next two printfs for normal, verbose, and quiet, 1226 * but not silent (in which case, we're twiddling, instead). 1227 */ 1228 if (parent == ROOT) { 1229 aprint_naive("%s (root)", dev->dv_xname); 1230 aprint_normal("%s (root)", dev->dv_xname); 1231 } else { 1232 aprint_naive("%s at %s", dev->dv_xname, parent->dv_xname); 1233 aprint_normal("%s at %s", dev->dv_xname, parent->dv_xname); 1234 if (print) 1235 (void) (*print)(aux, NULL); 1236 } 1237 1238 /* 1239 * Before attaching, clobber any unfound devices that are 1240 * otherwise identical. 1241 * XXX code above is redundant? 1242 */ 1243 drvname = dev->dv_cfdriver->cd_name; 1244 TAILQ_FOREACH(ct, &allcftables, ct_list) { 1245 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 1246 if (STREQ(cf->cf_name, drvname) && 1247 cf->cf_unit == dev->dv_unit) { 1248 if (cf->cf_fstate == FSTATE_NOTFOUND) 1249 cf->cf_fstate = FSTATE_FOUND; 1250 #ifdef __BROKEN_CONFIG_UNIT_USAGE 1251 /* 1252 * Bump the unit number on all starred cfdata 1253 * entries for this device. 1254 */ 1255 if (cf->cf_fstate == FSTATE_STAR) 1256 cf->cf_unit++; 1257 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 1258 } 1259 } 1260 } 1261 #ifdef __HAVE_DEVICE_REGISTER 1262 device_register(dev, aux); 1263 #endif 1264 1265 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_PROGRESS) 1266 if (splash_progress_state) 1267 splash_progress_update(splash_progress_state); 1268 #endif 1269 (*dev->dv_cfattach->ca_attach)(parent, dev, aux); 1270 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_PROGRESS) 1271 if (splash_progress_state) 1272 splash_progress_update(splash_progress_state); 1273 #endif 1274 1275 if (!device_pmf_is_registered(dev)) 1276 aprint_debug_dev(dev, "WARNING: power management not supported\n"); 1277 1278 config_process_deferred(&deferred_config_queue, dev); 1279 return (dev); 1280 } 1281 1282 device_t 1283 config_attach(device_t parent, cfdata_t cf, void *aux, cfprint_t print) 1284 { 1285 1286 return (config_attach_loc(parent, cf, NULL, aux, print)); 1287 } 1288 1289 /* 1290 * As above, but for pseudo-devices. Pseudo-devices attached in this 1291 * way are silently inserted into the device tree, and their children 1292 * attached. 1293 * 1294 * Note that because pseudo-devices are attached silently, any information 1295 * the attach routine wishes to print should be prefixed with the device 1296 * name by the attach routine. 1297 */ 1298 device_t 1299 config_attach_pseudo(cfdata_t cf) 1300 { 1301 device_t dev; 1302 1303 dev = config_devalloc(ROOT, cf, NULL); 1304 if (!dev) 1305 return (NULL); 1306 1307 /* XXX mark busy in cfdata */ 1308 1309 config_devlink(dev); 1310 1311 #if 0 /* XXXJRT not yet */ 1312 #ifdef __HAVE_DEVICE_REGISTER 1313 device_register(dev, NULL); /* like a root node */ 1314 #endif 1315 #endif 1316 (*dev->dv_cfattach->ca_attach)(ROOT, dev, NULL); 1317 config_process_deferred(&deferred_config_queue, dev); 1318 return (dev); 1319 } 1320 1321 /* 1322 * Detach a device. Optionally forced (e.g. because of hardware 1323 * removal) and quiet. Returns zero if successful, non-zero 1324 * (an error code) otherwise. 1325 * 1326 * Note that this code wants to be run from a process context, so 1327 * that the detach can sleep to allow processes which have a device 1328 * open to run and unwind their stacks. 1329 */ 1330 int 1331 config_detach(device_t dev, int flags) 1332 { 1333 struct cftable *ct; 1334 cfdata_t cf; 1335 const struct cfattach *ca; 1336 struct cfdriver *cd; 1337 #ifdef DIAGNOSTIC 1338 device_t d; 1339 #endif 1340 int rv = 0; 1341 1342 #ifdef DIAGNOSTIC 1343 if (dev->dv_cfdata != NULL && 1344 dev->dv_cfdata->cf_fstate != FSTATE_FOUND && 1345 dev->dv_cfdata->cf_fstate != FSTATE_STAR) 1346 panic("config_detach: bad device fstate"); 1347 #endif 1348 cd = dev->dv_cfdriver; 1349 KASSERT(cd != NULL); 1350 1351 ca = dev->dv_cfattach; 1352 KASSERT(ca != NULL); 1353 1354 /* 1355 * Ensure the device is deactivated. If the device doesn't 1356 * have an activation entry point, we allow DVF_ACTIVE to 1357 * remain set. Otherwise, if DVF_ACTIVE is still set, the 1358 * device is busy, and the detach fails. 1359 */ 1360 if (ca->ca_activate != NULL) 1361 rv = config_deactivate(dev); 1362 1363 /* 1364 * Try to detach the device. If that's not possible, then 1365 * we either panic() (for the forced but failed case), or 1366 * return an error. 1367 */ 1368 if (rv == 0) { 1369 if (ca->ca_detach != NULL) 1370 rv = (*ca->ca_detach)(dev, flags); 1371 else 1372 rv = EOPNOTSUPP; 1373 } 1374 if (rv != 0) { 1375 if ((flags & DETACH_FORCE) == 0) 1376 return (rv); 1377 else 1378 panic("config_detach: forced detach of %s failed (%d)", 1379 dev->dv_xname, rv); 1380 } 1381 1382 /* 1383 * The device has now been successfully detached. 1384 */ 1385 1386 #ifdef DIAGNOSTIC 1387 /* 1388 * Sanity: If you're successfully detached, you should have no 1389 * children. (Note that because children must be attached 1390 * after parents, we only need to search the latter part of 1391 * the list.) 1392 */ 1393 for (d = TAILQ_NEXT(dev, dv_list); d != NULL; 1394 d = TAILQ_NEXT(d, dv_list)) { 1395 if (d->dv_parent == dev) { 1396 printf("config_detach: detached device %s" 1397 " has children %s\n", dev->dv_xname, d->dv_xname); 1398 panic("config_detach"); 1399 } 1400 } 1401 #endif 1402 1403 /* notify the parent that the child is gone */ 1404 if (dev->dv_parent) { 1405 device_t p = dev->dv_parent; 1406 if (p->dv_cfattach->ca_childdetached) 1407 (*p->dv_cfattach->ca_childdetached)(p, dev); 1408 } 1409 1410 /* 1411 * Mark cfdata to show that the unit can be reused, if possible. 1412 */ 1413 TAILQ_FOREACH(ct, &allcftables, ct_list) { 1414 for (cf = ct->ct_cfdata; cf->cf_name; cf++) { 1415 if (STREQ(cf->cf_name, cd->cd_name)) { 1416 if (cf->cf_fstate == FSTATE_FOUND && 1417 cf->cf_unit == dev->dv_unit) 1418 cf->cf_fstate = FSTATE_NOTFOUND; 1419 #ifdef __BROKEN_CONFIG_UNIT_USAGE 1420 /* 1421 * Note that we can only re-use a starred 1422 * unit number if the unit being detached 1423 * had the last assigned unit number. 1424 */ 1425 if (cf->cf_fstate == FSTATE_STAR && 1426 cf->cf_unit == dev->dv_unit + 1) 1427 cf->cf_unit--; 1428 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 1429 } 1430 } 1431 } 1432 1433 config_devunlink(dev); 1434 1435 if (dev->dv_cfdata != NULL && (flags & DETACH_QUIET) == 0) 1436 aprint_normal("%s detached\n", dev->dv_xname); 1437 1438 config_devdealloc(dev); 1439 1440 return (0); 1441 } 1442 1443 int 1444 config_activate(device_t dev) 1445 { 1446 const struct cfattach *ca = dev->dv_cfattach; 1447 int rv = 0, oflags = dev->dv_flags; 1448 1449 if (ca->ca_activate == NULL) 1450 return (EOPNOTSUPP); 1451 1452 if ((dev->dv_flags & DVF_ACTIVE) == 0) { 1453 dev->dv_flags |= DVF_ACTIVE; 1454 rv = (*ca->ca_activate)(dev, DVACT_ACTIVATE); 1455 if (rv) 1456 dev->dv_flags = oflags; 1457 } 1458 return (rv); 1459 } 1460 1461 int 1462 config_deactivate(device_t dev) 1463 { 1464 const struct cfattach *ca = dev->dv_cfattach; 1465 int rv = 0, oflags = dev->dv_flags; 1466 1467 if (ca->ca_activate == NULL) 1468 return (EOPNOTSUPP); 1469 1470 if (dev->dv_flags & DVF_ACTIVE) { 1471 dev->dv_flags &= ~DVF_ACTIVE; 1472 rv = (*ca->ca_activate)(dev, DVACT_DEACTIVATE); 1473 if (rv) 1474 dev->dv_flags = oflags; 1475 } 1476 return (rv); 1477 } 1478 1479 /* 1480 * Defer the configuration of the specified device until all 1481 * of its parent's devices have been attached. 1482 */ 1483 void 1484 config_defer(device_t dev, void (*func)(device_t)) 1485 { 1486 struct deferred_config *dc; 1487 1488 if (dev->dv_parent == NULL) 1489 panic("config_defer: can't defer config of a root device"); 1490 1491 #ifdef DIAGNOSTIC 1492 for (dc = TAILQ_FIRST(&deferred_config_queue); dc != NULL; 1493 dc = TAILQ_NEXT(dc, dc_queue)) { 1494 if (dc->dc_dev == dev) 1495 panic("config_defer: deferred twice"); 1496 } 1497 #endif 1498 1499 dc = malloc(sizeof(*dc), M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 1500 if (dc == NULL) 1501 panic("config_defer: unable to allocate callback"); 1502 1503 dc->dc_dev = dev; 1504 dc->dc_func = func; 1505 TAILQ_INSERT_TAIL(&deferred_config_queue, dc, dc_queue); 1506 config_pending_incr(); 1507 } 1508 1509 /* 1510 * Defer some autoconfiguration for a device until after interrupts 1511 * are enabled. 1512 */ 1513 void 1514 config_interrupts(device_t dev, void (*func)(device_t)) 1515 { 1516 struct deferred_config *dc; 1517 1518 /* 1519 * If interrupts are enabled, callback now. 1520 */ 1521 if (cold == 0) { 1522 (*func)(dev); 1523 return; 1524 } 1525 1526 #ifdef DIAGNOSTIC 1527 for (dc = TAILQ_FIRST(&interrupt_config_queue); dc != NULL; 1528 dc = TAILQ_NEXT(dc, dc_queue)) { 1529 if (dc->dc_dev == dev) 1530 panic("config_interrupts: deferred twice"); 1531 } 1532 #endif 1533 1534 dc = malloc(sizeof(*dc), M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 1535 if (dc == NULL) 1536 panic("config_interrupts: unable to allocate callback"); 1537 1538 dc->dc_dev = dev; 1539 dc->dc_func = func; 1540 TAILQ_INSERT_TAIL(&interrupt_config_queue, dc, dc_queue); 1541 config_pending_incr(); 1542 } 1543 1544 /* 1545 * Process a deferred configuration queue. 1546 */ 1547 static void 1548 config_process_deferred(struct deferred_config_head *queue, 1549 device_t parent) 1550 { 1551 struct deferred_config *dc, *ndc; 1552 1553 for (dc = TAILQ_FIRST(queue); dc != NULL; dc = ndc) { 1554 ndc = TAILQ_NEXT(dc, dc_queue); 1555 if (parent == NULL || dc->dc_dev->dv_parent == parent) { 1556 TAILQ_REMOVE(queue, dc, dc_queue); 1557 (*dc->dc_func)(dc->dc_dev); 1558 free(dc, M_DEVBUF); 1559 config_pending_decr(); 1560 } 1561 } 1562 } 1563 1564 /* 1565 * Manipulate the config_pending semaphore. 1566 */ 1567 void 1568 config_pending_incr(void) 1569 { 1570 1571 config_pending++; 1572 } 1573 1574 void 1575 config_pending_decr(void) 1576 { 1577 1578 #ifdef DIAGNOSTIC 1579 if (config_pending == 0) 1580 panic("config_pending_decr: config_pending == 0"); 1581 #endif 1582 config_pending--; 1583 if (config_pending == 0) 1584 wakeup(&config_pending); 1585 } 1586 1587 /* 1588 * Register a "finalization" routine. Finalization routines are 1589 * called iteratively once all real devices have been found during 1590 * autoconfiguration, for as long as any one finalizer has done 1591 * any work. 1592 */ 1593 int 1594 config_finalize_register(device_t dev, int (*fn)(device_t)) 1595 { 1596 struct finalize_hook *f; 1597 1598 /* 1599 * If finalization has already been done, invoke the 1600 * callback function now. 1601 */ 1602 if (config_finalize_done) { 1603 while ((*fn)(dev) != 0) 1604 /* loop */ ; 1605 } 1606 1607 /* Ensure this isn't already on the list. */ 1608 TAILQ_FOREACH(f, &config_finalize_list, f_list) { 1609 if (f->f_func == fn && f->f_dev == dev) 1610 return (EEXIST); 1611 } 1612 1613 f = malloc(sizeof(*f), M_TEMP, M_WAITOK); 1614 f->f_func = fn; 1615 f->f_dev = dev; 1616 TAILQ_INSERT_TAIL(&config_finalize_list, f, f_list); 1617 1618 return (0); 1619 } 1620 1621 void 1622 config_finalize(void) 1623 { 1624 struct finalize_hook *f; 1625 int rv; 1626 1627 /* Run the hooks until none of them does any work. */ 1628 do { 1629 rv = 0; 1630 TAILQ_FOREACH(f, &config_finalize_list, f_list) 1631 rv |= (*f->f_func)(f->f_dev); 1632 } while (rv != 0); 1633 1634 config_finalize_done = 1; 1635 1636 /* Now free all the hooks. */ 1637 while ((f = TAILQ_FIRST(&config_finalize_list)) != NULL) { 1638 TAILQ_REMOVE(&config_finalize_list, f, f_list); 1639 free(f, M_TEMP); 1640 } 1641 } 1642 1643 /* 1644 * device_lookup: 1645 * 1646 * Look up a device instance for a given driver. 1647 */ 1648 void * 1649 device_lookup(cfdriver_t cd, int unit) 1650 { 1651 1652 if (unit < 0 || unit >= cd->cd_ndevs) 1653 return (NULL); 1654 1655 return (cd->cd_devs[unit]); 1656 } 1657 1658 /* 1659 * Accessor functions for the device_t type. 1660 */ 1661 devclass_t 1662 device_class(device_t dev) 1663 { 1664 1665 return (dev->dv_class); 1666 } 1667 1668 cfdata_t 1669 device_cfdata(device_t dev) 1670 { 1671 1672 return (dev->dv_cfdata); 1673 } 1674 1675 cfdriver_t 1676 device_cfdriver(device_t dev) 1677 { 1678 1679 return (dev->dv_cfdriver); 1680 } 1681 1682 cfattach_t 1683 device_cfattach(device_t dev) 1684 { 1685 1686 return (dev->dv_cfattach); 1687 } 1688 1689 int 1690 device_unit(device_t dev) 1691 { 1692 1693 return (dev->dv_unit); 1694 } 1695 1696 const char * 1697 device_xname(device_t dev) 1698 { 1699 1700 return (dev->dv_xname); 1701 } 1702 1703 device_t 1704 device_parent(device_t dev) 1705 { 1706 1707 return (dev->dv_parent); 1708 } 1709 1710 bool 1711 device_is_active(device_t dev) 1712 { 1713 int active_flags; 1714 1715 active_flags = DVF_ACTIVE; 1716 active_flags |= DVF_CLASS_SUSPENDED; 1717 active_flags |= DVF_DRIVER_SUSPENDED; 1718 active_flags |= DVF_BUS_SUSPENDED; 1719 1720 return ((dev->dv_flags & active_flags) == DVF_ACTIVE); 1721 } 1722 1723 bool 1724 device_is_enabled(device_t dev) 1725 { 1726 return (dev->dv_flags & DVF_ACTIVE) == DVF_ACTIVE; 1727 } 1728 1729 bool 1730 device_has_power(device_t dev) 1731 { 1732 int active_flags; 1733 1734 active_flags = DVF_ACTIVE | DVF_BUS_SUSPENDED; 1735 1736 return ((dev->dv_flags & active_flags) == DVF_ACTIVE); 1737 } 1738 1739 int 1740 device_locator(device_t dev, u_int locnum) 1741 { 1742 1743 KASSERT(dev->dv_locators != NULL); 1744 return (dev->dv_locators[locnum]); 1745 } 1746 1747 void * 1748 device_private(device_t dev) 1749 { 1750 1751 return (dev->dv_private); 1752 } 1753 1754 prop_dictionary_t 1755 device_properties(device_t dev) 1756 { 1757 1758 return (dev->dv_properties); 1759 } 1760 1761 /* 1762 * device_is_a: 1763 * 1764 * Returns true if the device is an instance of the specified 1765 * driver. 1766 */ 1767 bool 1768 device_is_a(device_t dev, const char *dname) 1769 { 1770 1771 return (strcmp(dev->dv_cfdriver->cd_name, dname) == 0); 1772 } 1773 1774 /* 1775 * Power management related functions. 1776 */ 1777 1778 bool 1779 device_pmf_is_registered(device_t dev) 1780 { 1781 return (dev->dv_flags & DVF_POWER_HANDLERS) != 0; 1782 } 1783 1784 bool 1785 device_pmf_driver_suspend(device_t dev) 1786 { 1787 if ((dev->dv_flags & DVF_DRIVER_SUSPENDED) != 0) 1788 return true; 1789 if ((dev->dv_flags & DVF_CLASS_SUSPENDED) == 0) 1790 return false; 1791 if (*dev->dv_driver_suspend != NULL && 1792 !(*dev->dv_driver_suspend)(dev)) 1793 return false; 1794 1795 dev->dv_flags |= DVF_DRIVER_SUSPENDED; 1796 return true; 1797 } 1798 1799 bool 1800 device_pmf_driver_resume(device_t dev) 1801 { 1802 if ((dev->dv_flags & DVF_DRIVER_SUSPENDED) == 0) 1803 return true; 1804 if ((dev->dv_flags & DVF_BUS_SUSPENDED) != 0) 1805 return false; 1806 if (*dev->dv_driver_resume != NULL && 1807 !(*dev->dv_driver_resume)(dev)) 1808 return false; 1809 1810 dev->dv_flags &= ~DVF_DRIVER_SUSPENDED; 1811 return true; 1812 } 1813 1814 void 1815 device_pmf_driver_register(device_t dev, 1816 bool (*suspend)(device_t), bool (*resume)(device_t)) 1817 { 1818 dev->dv_driver_suspend = suspend; 1819 dev->dv_driver_resume = resume; 1820 dev->dv_flags |= DVF_POWER_HANDLERS; 1821 } 1822 1823 void 1824 device_pmf_driver_deregister(device_t dev) 1825 { 1826 dev->dv_driver_suspend = NULL; 1827 dev->dv_driver_resume = NULL; 1828 dev->dv_flags &= ~DVF_POWER_HANDLERS; 1829 } 1830 1831 bool 1832 device_pmf_driver_child_register(device_t dev) 1833 { 1834 device_t parent = device_parent(dev); 1835 1836 if (parent == NULL || parent->dv_driver_child_register == NULL) 1837 return true; 1838 return (*parent->dv_driver_child_register)(dev); 1839 } 1840 1841 void 1842 device_pmf_driver_set_child_register(device_t dev, 1843 bool (*child_register)(device_t)) 1844 { 1845 dev->dv_driver_child_register = child_register; 1846 } 1847 1848 void * 1849 device_pmf_bus_private(device_t dev) 1850 { 1851 return dev->dv_bus_private; 1852 } 1853 1854 bool 1855 device_pmf_bus_suspend(device_t dev) 1856 { 1857 if ((dev->dv_flags & DVF_BUS_SUSPENDED) != 0) 1858 return true; 1859 if ((dev->dv_flags & DVF_CLASS_SUSPENDED) == 0 || 1860 (dev->dv_flags & DVF_DRIVER_SUSPENDED) == 0) 1861 return false; 1862 if (*dev->dv_bus_suspend != NULL && 1863 !(*dev->dv_bus_suspend)(dev)) 1864 return false; 1865 1866 dev->dv_flags |= DVF_BUS_SUSPENDED; 1867 return true; 1868 } 1869 1870 bool 1871 device_pmf_bus_resume(device_t dev) 1872 { 1873 if ((dev->dv_flags & DVF_BUS_SUSPENDED) == 0) 1874 return true; 1875 if (*dev->dv_bus_resume != NULL && 1876 !(*dev->dv_bus_resume)(dev)) 1877 return false; 1878 1879 dev->dv_flags &= ~DVF_BUS_SUSPENDED; 1880 return true; 1881 } 1882 1883 void 1884 device_pmf_bus_register(device_t dev, void *priv, 1885 bool (*suspend)(device_t), bool (*resume)(device_t), 1886 void (*deregister)(device_t)) 1887 { 1888 dev->dv_bus_private = priv; 1889 dev->dv_bus_resume = resume; 1890 dev->dv_bus_suspend = suspend; 1891 dev->dv_bus_deregister = deregister; 1892 } 1893 1894 void 1895 device_pmf_bus_deregister(device_t dev) 1896 { 1897 if (dev->dv_bus_deregister == NULL) 1898 return; 1899 (*dev->dv_bus_deregister)(dev); 1900 dev->dv_bus_private = NULL; 1901 dev->dv_bus_suspend = NULL; 1902 dev->dv_bus_resume = NULL; 1903 dev->dv_bus_deregister = NULL; 1904 } 1905 1906 void * 1907 device_pmf_class_private(device_t dev) 1908 { 1909 return dev->dv_class_private; 1910 } 1911 1912 bool 1913 device_pmf_class_suspend(device_t dev) 1914 { 1915 if ((dev->dv_flags & DVF_CLASS_SUSPENDED) != 0) 1916 return true; 1917 if (*dev->dv_class_suspend != NULL && 1918 !(*dev->dv_class_suspend)(dev)) 1919 return false; 1920 1921 dev->dv_flags |= DVF_CLASS_SUSPENDED; 1922 return true; 1923 } 1924 1925 bool 1926 device_pmf_class_resume(device_t dev) 1927 { 1928 if ((dev->dv_flags & DVF_CLASS_SUSPENDED) == 0) 1929 return true; 1930 if ((dev->dv_flags & DVF_BUS_SUSPENDED) != 0 || 1931 (dev->dv_flags & DVF_DRIVER_SUSPENDED) != 0) 1932 return false; 1933 if (*dev->dv_class_resume != NULL && 1934 !(*dev->dv_class_resume)(dev)) 1935 return false; 1936 1937 dev->dv_flags &= ~DVF_CLASS_SUSPENDED; 1938 return true; 1939 } 1940 1941 void 1942 device_pmf_class_register(device_t dev, void *priv, 1943 bool (*suspend)(device_t), bool (*resume)(device_t), 1944 void (*deregister)(device_t)) 1945 { 1946 dev->dv_class_private = priv; 1947 dev->dv_class_suspend = suspend; 1948 dev->dv_class_resume = resume; 1949 dev->dv_class_deregister = deregister; 1950 } 1951 1952 void 1953 device_pmf_class_deregister(device_t dev) 1954 { 1955 if (dev->dv_class_deregister == NULL) 1956 return; 1957 (*dev->dv_class_deregister)(dev); 1958 dev->dv_class_private = NULL; 1959 dev->dv_class_suspend = NULL; 1960 dev->dv_class_resume = NULL; 1961 dev->dv_class_deregister = NULL; 1962 } 1963 1964 bool 1965 device_active(device_t dev, devactive_t type) 1966 { 1967 size_t i; 1968 1969 if (dev->dv_activity_count == 0) 1970 return false; 1971 1972 for (i = 0; i < dev->dv_activity_count; ++i) 1973 (*dev->dv_activity_handlers[i])(dev, type); 1974 1975 return true; 1976 } 1977 1978 bool 1979 device_active_register(device_t dev, void (*handler)(device_t, devactive_t)) 1980 { 1981 void (**new_handlers)(device_t, devactive_t); 1982 void (**old_handlers)(device_t, devactive_t); 1983 size_t i, new_size; 1984 int s; 1985 1986 old_handlers = dev->dv_activity_handlers; 1987 1988 for (i = 0; i < dev->dv_activity_count; ++i) { 1989 if (old_handlers[i] == handler) 1990 panic("Double registering of idle handlers"); 1991 } 1992 1993 new_size = dev->dv_activity_count + 1; 1994 new_handlers = malloc(sizeof(void *) * new_size, M_DEVBUF, M_WAITOK); 1995 1996 memcpy(new_handlers, old_handlers, 1997 sizeof(void *) * dev->dv_activity_count); 1998 new_handlers[new_size - 1] = handler; 1999 2000 s = splhigh(); 2001 dev->dv_activity_count = new_size; 2002 dev->dv_activity_handlers = new_handlers; 2003 splx(s); 2004 2005 if (old_handlers != NULL) 2006 free(old_handlers, M_DEVBUF); 2007 2008 return true; 2009 } 2010 2011 void 2012 device_active_deregister(device_t dev, void (*handler)(device_t, devactive_t)) 2013 { 2014 void (**new_handlers)(device_t, devactive_t); 2015 void (**old_handlers)(device_t, devactive_t); 2016 size_t i, new_size; 2017 int s; 2018 2019 old_handlers = dev->dv_activity_handlers; 2020 2021 for (i = 0; i < dev->dv_activity_count; ++i) { 2022 if (old_handlers[i] == handler) 2023 break; 2024 } 2025 2026 if (i == dev->dv_activity_count) 2027 return; /* XXX panic? */ 2028 2029 new_size = dev->dv_activity_count - 1; 2030 2031 if (new_size == 0) { 2032 new_handlers = NULL; 2033 } else { 2034 new_handlers = malloc(sizeof(void *) * new_size, M_DEVBUF, 2035 M_WAITOK); 2036 memcpy(new_handlers, old_handlers, sizeof(void *) * i); 2037 memcpy(new_handlers + i, old_handlers + i + 1, 2038 sizeof(void *) * (new_size - i)); 2039 } 2040 2041 s = splhigh(); 2042 dev->dv_activity_count = new_size; 2043 dev->dv_activity_handlers = new_handlers; 2044 splx(s); 2045 2046 free(old_handlers, M_DEVBUF); 2047 } 2048