1 /* $NetBSD: subr_autoconf.c,v 1.62 2002/02/15 11:18:26 simonb 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. All advertising materials mentioning features or use of this software 59 * must display the following acknowledgement: 60 * This product includes software developed by the University of 61 * California, Berkeley and its contributors. 62 * 4. Neither the name of the University nor the names of its contributors 63 * may be used to endorse or promote products derived from this software 64 * without specific prior written permission. 65 * 66 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 67 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 68 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 69 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 70 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 74 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 75 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 76 * SUCH DAMAGE. 77 * 78 * from: Header: subr_autoconf.c,v 1.12 93/02/01 19:31:48 torek Exp (LBL) 79 * 80 * @(#)subr_autoconf.c 8.3 (Berkeley) 5/17/94 81 */ 82 83 #include <sys/cdefs.h> 84 __KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.62 2002/02/15 11:18:26 simonb Exp $"); 85 86 #include "opt_ddb.h" 87 88 #include <sys/param.h> 89 #include <sys/device.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 <machine/limits.h> 96 97 #include "opt_userconf.h" 98 #ifdef USERCONF 99 #include <sys/userconf.h> 100 #include <sys/reboot.h> 101 #endif 102 103 /* 104 * Autoconfiguration subroutines. 105 */ 106 107 /* 108 * ioconf.c exports exactly two names: cfdata and cfroots. All system 109 * devices and drivers are found via these tables. 110 */ 111 extern struct cfdata cfdata[]; 112 extern short cfroots[]; 113 114 #define ROOT ((struct device *)NULL) 115 116 struct matchinfo { 117 cfmatch_t fn; 118 struct device *parent; 119 void *aux; 120 struct cfdata *match; 121 int pri; 122 }; 123 124 static char *number(char *, int); 125 static void mapply(struct matchinfo *, struct cfdata *); 126 127 struct deferred_config { 128 TAILQ_ENTRY(deferred_config) dc_queue; 129 struct device *dc_dev; 130 void (*dc_func)(struct device *); 131 }; 132 133 TAILQ_HEAD(deferred_config_head, deferred_config); 134 135 struct deferred_config_head deferred_config_queue; 136 struct deferred_config_head interrupt_config_queue; 137 138 static void config_process_deferred(struct deferred_config_head *, 139 struct device *); 140 141 /* list of all devices */ 142 struct devicelist alldevs; 143 144 /* list of all events */ 145 struct evcntlist allevents = TAILQ_HEAD_INITIALIZER(allevents); 146 147 __volatile int config_pending; /* semaphore for mountroot */ 148 149 /* 150 * Configure the system's hardware. 151 */ 152 void 153 configure(void) 154 { 155 156 TAILQ_INIT(&deferred_config_queue); 157 TAILQ_INIT(&interrupt_config_queue); 158 TAILQ_INIT(&alldevs); 159 160 #ifdef USERCONF 161 if (boothowto & RB_USERCONF) 162 user_config(); 163 #endif 164 165 /* 166 * Do the machine-dependent portion of autoconfiguration. This 167 * sets the configuration machinery here in motion by "finding" 168 * the root bus. When this function returns, we expect interrupts 169 * to be enabled. 170 */ 171 cpu_configure(); 172 173 /* 174 * Now that we've found all the hardware, start the real time 175 * and statistics clocks. 176 */ 177 initclocks(); 178 179 cold = 0; /* clocks are running, we're warm now! */ 180 181 /* 182 * Now callback to finish configuration for devices which want 183 * to do this once interrupts are enabled. 184 */ 185 config_process_deferred(&interrupt_config_queue, NULL); 186 } 187 188 /* 189 * Apply the matching function and choose the best. This is used 190 * a few times and we want to keep the code small. 191 */ 192 static void 193 mapply(struct matchinfo *m, struct cfdata *cf) 194 { 195 int pri; 196 197 if (m->fn != NULL) 198 pri = (*m->fn)(m->parent, cf, m->aux); 199 else { 200 if (cf->cf_attach->ca_match == NULL) { 201 panic("mapply: no match function for '%s' device\n", 202 cf->cf_driver->cd_name); 203 } 204 pri = (*cf->cf_attach->ca_match)(m->parent, cf, m->aux); 205 } 206 if (pri > m->pri) { 207 m->match = cf; 208 m->pri = pri; 209 } 210 } 211 212 /* 213 * Iterate over all potential children of some device, calling the given 214 * function (default being the child's match function) for each one. 215 * Nonzero returns are matches; the highest value returned is considered 216 * the best match. Return the `found child' if we got a match, or NULL 217 * otherwise. The `aux' pointer is simply passed on through. 218 * 219 * Note that this function is designed so that it can be used to apply 220 * an arbitrary function to all potential children (its return value 221 * can be ignored). 222 */ 223 struct cfdata * 224 config_search(cfmatch_t fn, struct device *parent, void *aux) 225 { 226 struct cfdata *cf; 227 short *p; 228 struct matchinfo m; 229 230 m.fn = fn; 231 m.parent = parent; 232 m.aux = aux; 233 m.match = NULL; 234 m.pri = 0; 235 for (cf = cfdata; cf->cf_driver; cf++) { 236 /* 237 * Skip cf if no longer eligible, otherwise scan through 238 * parents for one matching `parent', and try match function. 239 */ 240 if (cf->cf_fstate == FSTATE_FOUND) 241 continue; 242 for (p = cf->cf_parents; *p >= 0; p++) 243 if (parent->dv_cfdata == &cfdata[*p]) 244 mapply(&m, cf); 245 } 246 return (m.match); 247 } 248 249 /* 250 * Find the given root device. 251 * This is much like config_search, but there is no parent. 252 */ 253 struct cfdata * 254 config_rootsearch(cfmatch_t fn, const char *rootname, void *aux) 255 { 256 struct cfdata *cf; 257 short *p; 258 struct matchinfo m; 259 260 m.fn = fn; 261 m.parent = ROOT; 262 m.aux = aux; 263 m.match = NULL; 264 m.pri = 0; 265 /* 266 * Look at root entries for matching name. We do not bother 267 * with found-state here since only one root should ever be 268 * searched (and it must be done first). 269 */ 270 for (p = cfroots; *p >= 0; p++) { 271 cf = &cfdata[*p]; 272 if (strcmp(cf->cf_driver->cd_name, rootname) == 0) 273 mapply(&m, cf); 274 } 275 return (m.match); 276 } 277 278 static const char *msgs[3] = { "", " not configured\n", " unsupported\n" }; 279 280 /* 281 * The given `aux' argument describes a device that has been found 282 * on the given parent, but not necessarily configured. Locate the 283 * configuration data for that device (using the submatch function 284 * provided, or using candidates' cd_match configuration driver 285 * functions) and attach it, and return true. If the device was 286 * not configured, call the given `print' function and return 0. 287 */ 288 struct device * 289 config_found_sm(struct device *parent, void *aux, cfprint_t print, 290 cfmatch_t submatch) 291 { 292 struct cfdata *cf; 293 294 if ((cf = config_search(submatch, parent, aux)) != NULL) 295 return (config_attach(parent, cf, aux, print)); 296 if (print) 297 printf("%s", msgs[(*print)(aux, parent->dv_xname)]); 298 return (NULL); 299 } 300 301 /* 302 * As above, but for root devices. 303 */ 304 struct device * 305 config_rootfound(const char *rootname, void *aux) 306 { 307 struct cfdata *cf; 308 309 if ((cf = config_rootsearch((cfmatch_t)NULL, rootname, aux)) != NULL) 310 return (config_attach(ROOT, cf, aux, (cfprint_t)NULL)); 311 printf("root device %s not configured\n", rootname); 312 return (NULL); 313 } 314 315 /* just like sprintf(buf, "%d") except that it works from the end */ 316 static char * 317 number(char *ep, int n) 318 { 319 320 *--ep = 0; 321 while (n >= 10) { 322 *--ep = (n % 10) + '0'; 323 n /= 10; 324 } 325 *--ep = n + '0'; 326 return (ep); 327 } 328 329 /* 330 * Expand the size of the cd_devs array if necessary. 331 */ 332 void 333 config_makeroom(int n, struct cfdriver *cd) 334 { 335 int old, new; 336 void **nsp; 337 338 if (n < cd->cd_ndevs) 339 return; 340 341 /* 342 * Need to expand the array. 343 */ 344 old = cd->cd_ndevs; 345 if (old == 0) 346 new = MINALLOCSIZE / sizeof(void *); 347 else 348 new = old * 2; 349 while (new <= n) 350 new *= 2; 351 cd->cd_ndevs = new; 352 nsp = malloc(new * sizeof(void *), M_DEVBUF, 353 cold ? M_NOWAIT : M_WAITOK); 354 if (nsp == NULL) 355 panic("config_attach: %sing dev array", 356 old != 0 ? "expand" : "creat"); 357 memset(nsp + old, 0, (new - old) * sizeof(void *)); 358 if (old != 0) { 359 memcpy(nsp, cd->cd_devs, old * sizeof(void *)); 360 free(cd->cd_devs, M_DEVBUF); 361 } 362 cd->cd_devs = nsp; 363 } 364 365 /* 366 * Attach a found device. Allocates memory for device variables. 367 */ 368 struct device * 369 config_attach(struct device *parent, struct cfdata *cf, void *aux, 370 cfprint_t print) 371 { 372 struct device *dev; 373 struct cfdriver *cd; 374 struct cfattach *ca; 375 size_t lname, lunit; 376 const char *xunit; 377 int myunit; 378 char num[10]; 379 380 cd = cf->cf_driver; 381 ca = cf->cf_attach; 382 if (ca->ca_devsize < sizeof(struct device)) 383 panic("config_attach"); 384 #ifndef __BROKEN_CONFIG_UNIT_USAGE 385 if (cf->cf_fstate == FSTATE_STAR) { 386 for (myunit = cf->cf_unit; myunit < cd->cd_ndevs; myunit++) 387 if (cd->cd_devs[myunit] == NULL) 388 break; 389 /* 390 * myunit is now the unit of the first NULL device pointer, 391 * or max(cd->cd_ndevs,cf->cf_unit). 392 */ 393 } else { 394 myunit = cf->cf_unit; 395 #else /* __BROKEN_CONFIG_UNIT_USAGE */ 396 myunit = cf->cf_unit; 397 if (cf->cf_fstate == FSTATE_STAR) 398 cf->cf_unit++; 399 else { 400 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 401 KASSERT(cf->cf_fstate == FSTATE_NOTFOUND); 402 cf->cf_fstate = FSTATE_FOUND; 403 } 404 405 /* compute length of name and decimal expansion of unit number */ 406 lname = strlen(cd->cd_name); 407 xunit = number(&num[sizeof(num)], myunit); 408 lunit = &num[sizeof(num)] - xunit; 409 if (lname + lunit >= sizeof(dev->dv_xname)) 410 panic("config_attach: device name too long"); 411 412 /* get memory for all device vars */ 413 dev = (struct device *)malloc(ca->ca_devsize, M_DEVBUF, 414 cold ? M_NOWAIT : M_WAITOK); 415 if (!dev) 416 panic("config_attach: memory allocation for device softc failed"); 417 memset(dev, 0, ca->ca_devsize); 418 TAILQ_INSERT_TAIL(&alldevs, dev, dv_list); /* link up */ 419 dev->dv_class = cd->cd_class; 420 dev->dv_cfdata = cf; 421 dev->dv_unit = myunit; 422 memcpy(dev->dv_xname, cd->cd_name, lname); 423 memcpy(dev->dv_xname + lname, xunit, lunit); 424 dev->dv_parent = parent; 425 dev->dv_flags = DVF_ACTIVE; /* always initially active */ 426 427 if (parent == ROOT) 428 printf("%s (root)", dev->dv_xname); 429 else { 430 printf("%s at %s", dev->dv_xname, parent->dv_xname); 431 if (print) 432 (void) (*print)(aux, NULL); 433 } 434 435 /* put this device in the devices array */ 436 config_makeroom(dev->dv_unit, cd); 437 if (cd->cd_devs[dev->dv_unit]) 438 panic("config_attach: duplicate %s", dev->dv_xname); 439 cd->cd_devs[dev->dv_unit] = dev; 440 441 /* 442 * Before attaching, clobber any unfound devices that are 443 * otherwise identical. 444 */ 445 #ifdef __BROKEN_CONFIG_UNIT_USAGE 446 /* bump the unit number on all starred cfdata for this device. */ 447 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 448 for (cf = cfdata; cf->cf_driver; cf++) 449 if (cf->cf_driver == cd && cf->cf_unit == dev->dv_unit) { 450 if (cf->cf_fstate == FSTATE_NOTFOUND) 451 cf->cf_fstate = FSTATE_FOUND; 452 #ifdef __BROKEN_CONFIG_UNIT_USAGE 453 if (cf->cf_fstate == FSTATE_STAR) 454 cf->cf_unit++; 455 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 456 } 457 #ifdef __HAVE_DEVICE_REGISTER 458 device_register(dev, aux); 459 #endif 460 (*ca->ca_attach)(parent, dev, aux); 461 config_process_deferred(&deferred_config_queue, dev); 462 return (dev); 463 } 464 465 /* 466 * Detach a device. Optionally forced (e.g. because of hardware 467 * removal) and quiet. Returns zero if successful, non-zero 468 * (an error code) otherwise. 469 * 470 * Note that this code wants to be run from a process context, so 471 * that the detach can sleep to allow processes which have a device 472 * open to run and unwind their stacks. 473 */ 474 int 475 config_detach(struct device *dev, int flags) 476 { 477 struct cfdata *cf; 478 struct cfattach *ca; 479 struct cfdriver *cd; 480 #ifdef DIAGNOSTIC 481 struct device *d; 482 #endif 483 int rv = 0, i; 484 485 cf = dev->dv_cfdata; 486 #ifdef DIAGNOSTIC 487 if (cf->cf_fstate != FSTATE_FOUND && cf->cf_fstate != FSTATE_STAR) 488 panic("config_detach: bad device fstate"); 489 #endif 490 ca = cf->cf_attach; 491 cd = cf->cf_driver; 492 493 /* 494 * Ensure the device is deactivated. If the device doesn't 495 * have an activation entry point, we allow DVF_ACTIVE to 496 * remain set. Otherwise, if DVF_ACTIVE is still set, the 497 * device is busy, and the detach fails. 498 */ 499 if (ca->ca_activate != NULL) 500 rv = config_deactivate(dev); 501 502 /* 503 * Try to detach the device. If that's not possible, then 504 * we either panic() (for the forced but failed case), or 505 * return an error. 506 */ 507 if (rv == 0) { 508 if (ca->ca_detach != NULL) 509 rv = (*ca->ca_detach)(dev, flags); 510 else 511 rv = EOPNOTSUPP; 512 } 513 if (rv != 0) { 514 if ((flags & DETACH_FORCE) == 0) 515 return (rv); 516 else 517 panic("config_detach: forced detach of %s failed (%d)", 518 dev->dv_xname, rv); 519 } 520 521 /* 522 * The device has now been successfully detached. 523 */ 524 525 #ifdef DIAGNOSTIC 526 /* 527 * Sanity: If you're successfully detached, you should have no 528 * children. (Note that because children must be attached 529 * after parents, we only need to search the latter part of 530 * the list.) 531 */ 532 for (d = TAILQ_NEXT(dev, dv_list); d != NULL; 533 d = TAILQ_NEXT(d, dv_list)) { 534 if (d->dv_parent == dev) { 535 printf("config_detach: detached device %s" 536 " has children %s\n", dev->dv_xname, d->dv_xname); 537 panic("config_detach"); 538 } 539 } 540 #endif 541 542 /* 543 * Mark cfdata to show that the unit can be reused, if possible. 544 */ 545 #ifdef __BROKEN_CONFIG_UNIT_USAGE 546 /* 547 * Note that we can only re-use a starred unit number if the unit 548 * being detached had the last assigned unit number. 549 */ 550 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 551 for (cf = cfdata; cf->cf_driver; cf++) { 552 if (cf->cf_driver == cd) { 553 if (cf->cf_fstate == FSTATE_FOUND && 554 cf->cf_unit == dev->dv_unit) 555 cf->cf_fstate = FSTATE_NOTFOUND; 556 #ifdef __BROKEN_CONFIG_UNIT_USAGE 557 if (cf->cf_fstate == FSTATE_STAR && 558 cf->cf_unit == dev->dv_unit + 1) 559 cf->cf_unit--; 560 #endif /* __BROKEN_CONFIG_UNIT_USAGE */ 561 } 562 } 563 564 /* 565 * Unlink from device list. 566 */ 567 TAILQ_REMOVE(&alldevs, dev, dv_list); 568 569 /* 570 * Remove from cfdriver's array, tell the world, and free softc. 571 */ 572 cd->cd_devs[dev->dv_unit] = NULL; 573 if ((flags & DETACH_QUIET) == 0) 574 printf("%s detached\n", dev->dv_xname); 575 free(dev, M_DEVBUF); 576 577 /* 578 * If the device now has no units in use, deallocate its softc array. 579 */ 580 for (i = 0; i < cd->cd_ndevs; i++) 581 if (cd->cd_devs[i] != NULL) 582 break; 583 if (i == cd->cd_ndevs) { /* nothing found; deallocate */ 584 free(cd->cd_devs, M_DEVBUF); 585 cd->cd_devs = NULL; 586 cd->cd_ndevs = 0; 587 } 588 589 /* 590 * Return success. 591 */ 592 return (0); 593 } 594 595 int 596 config_activate(struct device *dev) 597 { 598 struct cfattach *ca = dev->dv_cfdata->cf_attach; 599 int rv = 0, oflags = dev->dv_flags; 600 601 if (ca->ca_activate == NULL) 602 return (EOPNOTSUPP); 603 604 if ((dev->dv_flags & DVF_ACTIVE) == 0) { 605 dev->dv_flags |= DVF_ACTIVE; 606 rv = (*ca->ca_activate)(dev, DVACT_ACTIVATE); 607 if (rv) 608 dev->dv_flags = oflags; 609 } 610 return (rv); 611 } 612 613 int 614 config_deactivate(struct device *dev) 615 { 616 struct cfattach *ca = dev->dv_cfdata->cf_attach; 617 int rv = 0, oflags = dev->dv_flags; 618 619 if (ca->ca_activate == NULL) 620 return (EOPNOTSUPP); 621 622 if (dev->dv_flags & DVF_ACTIVE) { 623 dev->dv_flags &= ~DVF_ACTIVE; 624 rv = (*ca->ca_activate)(dev, DVACT_DEACTIVATE); 625 if (rv) 626 dev->dv_flags = oflags; 627 } 628 return (rv); 629 } 630 631 /* 632 * Defer the configuration of the specified device until all 633 * of its parent's devices have been attached. 634 */ 635 void 636 config_defer(struct device *dev, void (*func)(struct device *)) 637 { 638 struct deferred_config *dc; 639 640 if (dev->dv_parent == NULL) 641 panic("config_defer: can't defer config of a root device"); 642 643 #ifdef DIAGNOSTIC 644 for (dc = TAILQ_FIRST(&deferred_config_queue); dc != NULL; 645 dc = TAILQ_NEXT(dc, dc_queue)) { 646 if (dc->dc_dev == dev) 647 panic("config_defer: deferred twice"); 648 } 649 #endif 650 651 dc = malloc(sizeof(*dc), M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 652 if (dc == NULL) 653 panic("config_defer: unable to allocate callback"); 654 655 dc->dc_dev = dev; 656 dc->dc_func = func; 657 TAILQ_INSERT_TAIL(&deferred_config_queue, dc, dc_queue); 658 config_pending_incr(); 659 } 660 661 /* 662 * Defer some autoconfiguration for a device until after interrupts 663 * are enabled. 664 */ 665 void 666 config_interrupts(struct device *dev, void (*func)(struct device *)) 667 { 668 struct deferred_config *dc; 669 670 /* 671 * If interrupts are enabled, callback now. 672 */ 673 if (cold == 0) { 674 (*func)(dev); 675 return; 676 } 677 678 #ifdef DIAGNOSTIC 679 for (dc = TAILQ_FIRST(&interrupt_config_queue); dc != NULL; 680 dc = TAILQ_NEXT(dc, dc_queue)) { 681 if (dc->dc_dev == dev) 682 panic("config_interrupts: deferred twice"); 683 } 684 #endif 685 686 dc = malloc(sizeof(*dc), M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); 687 if (dc == NULL) 688 panic("config_interrupts: unable to allocate callback"); 689 690 dc->dc_dev = dev; 691 dc->dc_func = func; 692 TAILQ_INSERT_TAIL(&interrupt_config_queue, dc, dc_queue); 693 config_pending_incr(); 694 } 695 696 /* 697 * Process a deferred configuration queue. 698 */ 699 static void 700 config_process_deferred(struct deferred_config_head *queue, 701 struct device *parent) 702 { 703 struct deferred_config *dc, *ndc; 704 705 for (dc = TAILQ_FIRST(queue); dc != NULL; dc = ndc) { 706 ndc = TAILQ_NEXT(dc, dc_queue); 707 if (parent == NULL || dc->dc_dev->dv_parent == parent) { 708 TAILQ_REMOVE(queue, dc, dc_queue); 709 (*dc->dc_func)(dc->dc_dev); 710 free(dc, M_DEVBUF); 711 config_pending_decr(); 712 } 713 } 714 } 715 716 /* 717 * Manipulate the config_pending semaphore. 718 */ 719 void 720 config_pending_incr(void) 721 { 722 723 config_pending++; 724 } 725 726 void 727 config_pending_decr(void) 728 { 729 730 #ifdef DIAGNOSTIC 731 if (config_pending == 0) 732 panic("config_pending_decr: config_pending == 0"); 733 #endif 734 config_pending--; 735 if (config_pending == 0) 736 wakeup((void *)&config_pending); 737 } 738 739 /* 740 * Attach a statically-initialized event. The type and string pointers 741 * are already set up. 742 */ 743 void 744 evcnt_attach_static(struct evcnt *ev) 745 { 746 int len; 747 748 len = strlen(ev->ev_group); 749 #ifdef DIAGNOSTIC 750 if (len >= EVCNT_STRING_MAX) /* ..._MAX includes NUL */ 751 panic("evcnt_attach_static: group length (%s)", ev->ev_group); 752 #endif 753 ev->ev_grouplen = len; 754 755 len = strlen(ev->ev_name); 756 #ifdef DIAGNOSTIC 757 if (len >= EVCNT_STRING_MAX) /* ..._MAX includes NUL */ 758 panic("evcnt_attach_static: name length (%s)", ev->ev_name); 759 #endif 760 ev->ev_namelen = len; 761 762 TAILQ_INSERT_TAIL(&allevents, ev, ev_list); 763 } 764 765 /* 766 * Attach a dynamically-initialized event. Zero it, set up the type 767 * and string pointers and then act like it was statically initialized. 768 */ 769 void 770 evcnt_attach_dynamic(struct evcnt *ev, int type, const struct evcnt *parent, 771 const char *group, const char *name) 772 { 773 774 memset(ev, 0, sizeof *ev); 775 ev->ev_type = type; 776 ev->ev_parent = parent; 777 ev->ev_group = group; 778 ev->ev_name = name; 779 evcnt_attach_static(ev); 780 } 781 782 /* 783 * Detach an event. 784 */ 785 void 786 evcnt_detach(struct evcnt *ev) 787 { 788 789 TAILQ_REMOVE(&allevents, ev, ev_list); 790 } 791 792 #ifdef DDB 793 void 794 event_print(int full, void (*pr)(const char *, ...)) 795 { 796 struct evcnt *evp; 797 798 TAILQ_FOREACH(evp, &allevents, ev_list) { 799 if (evp->ev_count == 0 && !full) 800 continue; 801 802 (*pr)("evcnt type %d: %s %s = %lld\n", evp->ev_type, 803 evp->ev_group, evp->ev_name, evp->ev_count); 804 } 805 } 806 #endif /* DDB */ 807