1 /* 2 * Copyright (c) 1997,1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/kern/subr_bus.c,v 1.54.2.9 2002/10/10 15:13:32 jhb Exp $ 27 */ 28 29 #include "opt_bus.h" 30 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/kobj.h> 37 #include <sys/bus_private.h> 38 #include <sys/sysctl.h> 39 #include <sys/systm.h> 40 #include <sys/bus.h> 41 #include <sys/rman.h> 42 #include <sys/device.h> 43 #include <sys/lock.h> 44 #include <sys/conf.h> 45 #include <sys/uio.h> 46 #include <sys/filio.h> 47 #include <sys/event.h> 48 #include <sys/signalvar.h> 49 #include <sys/machintr.h> 50 51 #include <machine/stdarg.h> /* for device_printf() */ 52 53 #include <sys/thread2.h> 54 #include <sys/mplock2.h> 55 56 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 57 58 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 59 60 #ifdef BUS_DEBUG 61 #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n")) 62 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 63 #define DRIVERNAME(d) ((d)? d->name : "no driver") 64 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 65 66 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 67 * prevent syslog from deleting initial spaces 68 */ 69 #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0) 70 71 static void print_device_short(device_t dev, int indent); 72 static void print_device(device_t dev, int indent); 73 void print_device_tree_short(device_t dev, int indent); 74 void print_device_tree(device_t dev, int indent); 75 static void print_driver_short(driver_t *driver, int indent); 76 static void print_driver(driver_t *driver, int indent); 77 static void print_driver_list(driver_list_t drivers, int indent); 78 static void print_devclass_short(devclass_t dc, int indent); 79 static void print_devclass(devclass_t dc, int indent); 80 void print_devclass_list_short(void); 81 void print_devclass_list(void); 82 83 #else 84 /* Make the compiler ignore the function calls */ 85 #define PDEBUG(a) /* nop */ 86 #define DEVICENAME(d) /* nop */ 87 #define DRIVERNAME(d) /* nop */ 88 #define DEVCLANAME(d) /* nop */ 89 90 #define print_device_short(d,i) /* nop */ 91 #define print_device(d,i) /* nop */ 92 #define print_device_tree_short(d,i) /* nop */ 93 #define print_device_tree(d,i) /* nop */ 94 #define print_driver_short(d,i) /* nop */ 95 #define print_driver(d,i) /* nop */ 96 #define print_driver_list(d,i) /* nop */ 97 #define print_devclass_short(d,i) /* nop */ 98 #define print_devclass(d,i) /* nop */ 99 #define print_devclass_list_short() /* nop */ 100 #define print_devclass_list() /* nop */ 101 #endif 102 103 static void device_attach_async(device_t dev); 104 static void device_attach_thread(void *arg); 105 static int device_doattach(device_t dev); 106 107 static int do_async_attach = 0; 108 static int numasyncthreads; 109 TUNABLE_INT("kern.do_async_attach", &do_async_attach); 110 111 /* 112 * /dev/devctl implementation 113 */ 114 115 /* 116 * This design allows only one reader for /dev/devctl. This is not desirable 117 * in the long run, but will get a lot of hair out of this implementation. 118 * Maybe we should make this device a clonable device. 119 * 120 * Also note: we specifically do not attach a device to the device_t tree 121 * to avoid potential chicken and egg problems. One could argue that all 122 * of this belongs to the root node. One could also further argue that the 123 * sysctl interface that we have not might more properly be an ioctl 124 * interface, but at this stage of the game, I'm not inclined to rock that 125 * boat. 126 * 127 * I'm also not sure that the SIGIO support is done correctly or not, as 128 * I copied it from a driver that had SIGIO support that likely hasn't been 129 * tested since 3.4 or 2.2.8! 130 */ 131 132 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 133 static int devctl_disable = 0; 134 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 135 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0, 136 sysctl_devctl_disable, "I", "devctl disable"); 137 138 static d_open_t devopen; 139 static d_close_t devclose; 140 static d_read_t devread; 141 static d_ioctl_t devioctl; 142 static d_kqfilter_t devkqfilter; 143 144 static struct dev_ops devctl_ops = { 145 { "devctl", 0, 0 }, 146 .d_open = devopen, 147 .d_close = devclose, 148 .d_read = devread, 149 .d_ioctl = devioctl, 150 .d_kqfilter = devkqfilter 151 }; 152 153 struct dev_event_info 154 { 155 char *dei_data; 156 TAILQ_ENTRY(dev_event_info) dei_link; 157 }; 158 159 TAILQ_HEAD(devq, dev_event_info); 160 161 static struct dev_softc 162 { 163 int inuse; 164 int nonblock; 165 struct lock lock; 166 struct kqinfo kq; 167 struct devq devq; 168 struct proc *async_proc; 169 } devsoftc; 170 171 static void 172 devinit(void) 173 { 174 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl"); 175 lockinit(&devsoftc.lock, "dev mtx", 0, 0); 176 TAILQ_INIT(&devsoftc.devq); 177 } 178 179 static int 180 devopen(struct dev_open_args *ap) 181 { 182 if (devsoftc.inuse) 183 return (EBUSY); 184 /* move to init */ 185 devsoftc.inuse = 1; 186 devsoftc.nonblock = 0; 187 devsoftc.async_proc = NULL; 188 return (0); 189 } 190 191 static int 192 devclose(struct dev_close_args *ap) 193 { 194 devsoftc.inuse = 0; 195 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 196 wakeup(&devsoftc); 197 lockmgr(&devsoftc.lock, LK_RELEASE); 198 199 return (0); 200 } 201 202 /* 203 * The read channel for this device is used to report changes to 204 * userland in realtime. We are required to free the data as well as 205 * the n1 object because we allocate them separately. Also note that 206 * we return one record at a time. If you try to read this device a 207 * character at a time, you will lose the rest of the data. Listening 208 * programs are expected to cope. 209 */ 210 static int 211 devread(struct dev_read_args *ap) 212 { 213 struct uio *uio = ap->a_uio; 214 struct dev_event_info *n1; 215 int rv; 216 217 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 218 while (TAILQ_EMPTY(&devsoftc.devq)) { 219 if (devsoftc.nonblock) { 220 lockmgr(&devsoftc.lock, LK_RELEASE); 221 return (EAGAIN); 222 } 223 tsleep_interlock(&devsoftc, PCATCH); 224 lockmgr(&devsoftc.lock, LK_RELEASE); 225 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0); 226 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 227 if (rv) { 228 /* 229 * Need to translate ERESTART to EINTR here? -- jake 230 */ 231 lockmgr(&devsoftc.lock, LK_RELEASE); 232 return (rv); 233 } 234 } 235 n1 = TAILQ_FIRST(&devsoftc.devq); 236 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 237 lockmgr(&devsoftc.lock, LK_RELEASE); 238 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 239 kfree(n1->dei_data, M_BUS); 240 kfree(n1, M_BUS); 241 return (rv); 242 } 243 244 static int 245 devioctl(struct dev_ioctl_args *ap) 246 { 247 switch (ap->a_cmd) { 248 249 case FIONBIO: 250 if (*(int*)ap->a_data) 251 devsoftc.nonblock = 1; 252 else 253 devsoftc.nonblock = 0; 254 return (0); 255 case FIOASYNC: 256 if (*(int*)ap->a_data) 257 devsoftc.async_proc = curproc; 258 else 259 devsoftc.async_proc = NULL; 260 return (0); 261 262 /* (un)Support for other fcntl() calls. */ 263 case FIOCLEX: 264 case FIONCLEX: 265 case FIONREAD: 266 case FIOSETOWN: 267 case FIOGETOWN: 268 default: 269 break; 270 } 271 return (ENOTTY); 272 } 273 274 static void dev_filter_detach(struct knote *); 275 static int dev_filter_read(struct knote *, long); 276 277 static struct filterops dev_filtops = 278 { FILTEROP_ISFD, NULL, dev_filter_detach, dev_filter_read }; 279 280 static int 281 devkqfilter(struct dev_kqfilter_args *ap) 282 { 283 struct knote *kn = ap->a_kn; 284 struct klist *klist; 285 286 ap->a_result = 0; 287 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 288 289 switch (kn->kn_filter) { 290 case EVFILT_READ: 291 kn->kn_fop = &dev_filtops; 292 break; 293 default: 294 ap->a_result = EOPNOTSUPP; 295 lockmgr(&devsoftc.lock, LK_RELEASE); 296 return (0); 297 } 298 299 klist = &devsoftc.kq.ki_note; 300 knote_insert(klist, kn); 301 302 lockmgr(&devsoftc.lock, LK_RELEASE); 303 304 return (0); 305 } 306 307 static void 308 dev_filter_detach(struct knote *kn) 309 { 310 struct klist *klist; 311 312 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 313 klist = &devsoftc.kq.ki_note; 314 knote_remove(klist, kn); 315 lockmgr(&devsoftc.lock, LK_RELEASE); 316 } 317 318 static int 319 dev_filter_read(struct knote *kn, long hint) 320 { 321 int ready = 0; 322 323 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 324 if (!TAILQ_EMPTY(&devsoftc.devq)) 325 ready = 1; 326 lockmgr(&devsoftc.lock, LK_RELEASE); 327 328 return (ready); 329 } 330 331 332 /** 333 * @brief Return whether the userland process is running 334 */ 335 boolean_t 336 devctl_process_running(void) 337 { 338 return (devsoftc.inuse == 1); 339 } 340 341 /** 342 * @brief Queue data to be read from the devctl device 343 * 344 * Generic interface to queue data to the devctl device. It is 345 * assumed that @p data is properly formatted. It is further assumed 346 * that @p data is allocated using the M_BUS malloc type. 347 */ 348 void 349 devctl_queue_data(char *data) 350 { 351 struct dev_event_info *n1 = NULL; 352 struct proc *p; 353 354 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT); 355 if (n1 == NULL) 356 return; 357 n1->dei_data = data; 358 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 359 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 360 wakeup(&devsoftc); 361 lockmgr(&devsoftc.lock, LK_RELEASE); 362 get_mplock(); /* XXX */ 363 KNOTE(&devsoftc.kq.ki_note, 0); 364 rel_mplock(); /* XXX */ 365 p = devsoftc.async_proc; 366 if (p != NULL) 367 ksignal(p, SIGIO); 368 } 369 370 /** 371 * @brief Send a 'notification' to userland, using standard ways 372 */ 373 void 374 devctl_notify(const char *system, const char *subsystem, const char *type, 375 const char *data) 376 { 377 int len = 0; 378 char *msg; 379 380 if (system == NULL) 381 return; /* BOGUS! Must specify system. */ 382 if (subsystem == NULL) 383 return; /* BOGUS! Must specify subsystem. */ 384 if (type == NULL) 385 return; /* BOGUS! Must specify type. */ 386 len += strlen(" system=") + strlen(system); 387 len += strlen(" subsystem=") + strlen(subsystem); 388 len += strlen(" type=") + strlen(type); 389 /* add in the data message plus newline. */ 390 if (data != NULL) 391 len += strlen(data); 392 len += 3; /* '!', '\n', and NUL */ 393 msg = kmalloc(len, M_BUS, M_NOWAIT); 394 if (msg == NULL) 395 return; /* Drop it on the floor */ 396 if (data != NULL) 397 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n", 398 system, subsystem, type, data); 399 else 400 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n", 401 system, subsystem, type); 402 devctl_queue_data(msg); 403 } 404 405 /* 406 * Common routine that tries to make sending messages as easy as possible. 407 * We allocate memory for the data, copy strings into that, but do not 408 * free it unless there's an error. The dequeue part of the driver should 409 * free the data. We don't send data when the device is disabled. We do 410 * send data, even when we have no listeners, because we wish to avoid 411 * races relating to startup and restart of listening applications. 412 * 413 * devaddq is designed to string together the type of event, with the 414 * object of that event, plus the plug and play info and location info 415 * for that event. This is likely most useful for devices, but less 416 * useful for other consumers of this interface. Those should use 417 * the devctl_queue_data() interface instead. 418 */ 419 static void 420 devaddq(const char *type, const char *what, device_t dev) 421 { 422 char *data = NULL; 423 char *loc = NULL; 424 char *pnp = NULL; 425 const char *parstr; 426 427 if (devctl_disable) 428 return; 429 data = kmalloc(1024, M_BUS, M_NOWAIT); 430 if (data == NULL) 431 goto bad; 432 433 /* get the bus specific location of this device */ 434 loc = kmalloc(1024, M_BUS, M_NOWAIT); 435 if (loc == NULL) 436 goto bad; 437 *loc = '\0'; 438 bus_child_location_str(dev, loc, 1024); 439 440 /* Get the bus specific pnp info of this device */ 441 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 442 if (pnp == NULL) 443 goto bad; 444 *pnp = '\0'; 445 bus_child_pnpinfo_str(dev, pnp, 1024); 446 447 /* Get the parent of this device, or / if high enough in the tree. */ 448 if (device_get_parent(dev) == NULL) 449 parstr = "."; /* Or '/' ? */ 450 else 451 parstr = device_get_nameunit(device_get_parent(dev)); 452 /* String it all together. */ 453 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp, 454 parstr); 455 kfree(loc, M_BUS); 456 kfree(pnp, M_BUS); 457 devctl_queue_data(data); 458 return; 459 bad: 460 kfree(pnp, M_BUS); 461 kfree(loc, M_BUS); 462 kfree(data, M_BUS); 463 return; 464 } 465 466 /* 467 * A device was added to the tree. We are called just after it successfully 468 * attaches (that is, probe and attach success for this device). No call 469 * is made if a device is merely parented into the tree. See devnomatch 470 * if probe fails. If attach fails, no notification is sent (but maybe 471 * we should have a different message for this). 472 */ 473 static void 474 devadded(device_t dev) 475 { 476 char *pnp = NULL; 477 char *tmp = NULL; 478 479 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 480 if (pnp == NULL) 481 goto fail; 482 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 483 if (tmp == NULL) 484 goto fail; 485 *pnp = '\0'; 486 bus_child_pnpinfo_str(dev, pnp, 1024); 487 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 488 devaddq("+", tmp, dev); 489 fail: 490 if (pnp != NULL) 491 kfree(pnp, M_BUS); 492 if (tmp != NULL) 493 kfree(tmp, M_BUS); 494 return; 495 } 496 497 /* 498 * A device was removed from the tree. We are called just before this 499 * happens. 500 */ 501 static void 502 devremoved(device_t dev) 503 { 504 char *pnp = NULL; 505 char *tmp = NULL; 506 507 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 508 if (pnp == NULL) 509 goto fail; 510 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 511 if (tmp == NULL) 512 goto fail; 513 *pnp = '\0'; 514 bus_child_pnpinfo_str(dev, pnp, 1024); 515 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 516 devaddq("-", tmp, dev); 517 fail: 518 if (pnp != NULL) 519 kfree(pnp, M_BUS); 520 if (tmp != NULL) 521 kfree(tmp, M_BUS); 522 return; 523 } 524 525 /* 526 * Called when there's no match for this device. This is only called 527 * the first time that no match happens, so we don't keep getitng this 528 * message. Should that prove to be undesirable, we can change it. 529 * This is called when all drivers that can attach to a given bus 530 * decline to accept this device. Other errrors may not be detected. 531 */ 532 static void 533 devnomatch(device_t dev) 534 { 535 devaddq("?", "", dev); 536 } 537 538 static int 539 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 540 { 541 struct dev_event_info *n1; 542 int dis, error; 543 544 dis = devctl_disable; 545 error = sysctl_handle_int(oidp, &dis, 0, req); 546 if (error || !req->newptr) 547 return (error); 548 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 549 devctl_disable = dis; 550 if (dis) { 551 while (!TAILQ_EMPTY(&devsoftc.devq)) { 552 n1 = TAILQ_FIRST(&devsoftc.devq); 553 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 554 kfree(n1->dei_data, M_BUS); 555 kfree(n1, M_BUS); 556 } 557 } 558 lockmgr(&devsoftc.lock, LK_RELEASE); 559 return (0); 560 } 561 562 /* End of /dev/devctl code */ 563 564 TAILQ_HEAD(,device) bus_data_devices; 565 static int bus_data_generation = 1; 566 567 kobj_method_t null_methods[] = { 568 { 0, 0 } 569 }; 570 571 DEFINE_CLASS(null, null_methods, 0); 572 573 /* 574 * Devclass implementation 575 */ 576 577 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 578 579 static devclass_t 580 devclass_find_internal(const char *classname, const char *parentname, 581 int create) 582 { 583 devclass_t dc; 584 585 PDEBUG(("looking for %s", classname)); 586 if (classname == NULL) 587 return(NULL); 588 589 TAILQ_FOREACH(dc, &devclasses, link) 590 if (!strcmp(dc->name, classname)) 591 break; 592 593 if (create && !dc) { 594 PDEBUG(("creating %s", classname)); 595 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1, 596 M_BUS, M_INTWAIT | M_ZERO); 597 if (!dc) 598 return(NULL); 599 dc->parent = NULL; 600 dc->name = (char*) (dc + 1); 601 strcpy(dc->name, classname); 602 dc->devices = NULL; 603 dc->maxunit = 0; 604 TAILQ_INIT(&dc->drivers); 605 TAILQ_INSERT_TAIL(&devclasses, dc, link); 606 607 bus_data_generation_update(); 608 609 } 610 611 /* 612 * If a parent class is specified, then set that as our parent so 613 * that this devclass will support drivers for the parent class as 614 * well. If the parent class has the same name don't do this though 615 * as it creates a cycle that can trigger an infinite loop in 616 * device_probe_child() if a device exists for which there is no 617 * suitable driver. 618 */ 619 if (parentname && dc && !dc->parent && 620 strcmp(classname, parentname) != 0) 621 dc->parent = devclass_find_internal(parentname, NULL, FALSE); 622 623 return(dc); 624 } 625 626 devclass_t 627 devclass_create(const char *classname) 628 { 629 return(devclass_find_internal(classname, NULL, TRUE)); 630 } 631 632 devclass_t 633 devclass_find(const char *classname) 634 { 635 return(devclass_find_internal(classname, NULL, FALSE)); 636 } 637 638 device_t 639 devclass_find_unit(const char *classname, int unit) 640 { 641 devclass_t dc; 642 643 if ((dc = devclass_find(classname)) != NULL) 644 return(devclass_get_device(dc, unit)); 645 return (NULL); 646 } 647 648 int 649 devclass_add_driver(devclass_t dc, driver_t *driver) 650 { 651 driverlink_t dl; 652 device_t dev; 653 int i; 654 655 PDEBUG(("%s", DRIVERNAME(driver))); 656 657 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 658 if (!dl) 659 return(ENOMEM); 660 661 /* 662 * Compile the driver's methods. Also increase the reference count 663 * so that the class doesn't get freed when the last instance 664 * goes. This means we can safely use static methods and avoids a 665 * double-free in devclass_delete_driver. 666 */ 667 kobj_class_instantiate(driver); 668 669 /* 670 * Make sure the devclass which the driver is implementing exists. 671 */ 672 devclass_find_internal(driver->name, NULL, TRUE); 673 674 dl->driver = driver; 675 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 676 677 /* 678 * Call BUS_DRIVER_ADDED for any existing busses in this class, 679 * but only if the bus has already been attached (otherwise we 680 * might probe too early). 681 * 682 * This is what will cause a newly loaded module to be associated 683 * with hardware. bus_generic_driver_added() is typically what ends 684 * up being called. 685 */ 686 for (i = 0; i < dc->maxunit; i++) { 687 if ((dev = dc->devices[i]) != NULL) { 688 if (dev->state >= DS_ATTACHED) 689 BUS_DRIVER_ADDED(dev, driver); 690 } 691 } 692 693 bus_data_generation_update(); 694 return(0); 695 } 696 697 int 698 devclass_delete_driver(devclass_t busclass, driver_t *driver) 699 { 700 devclass_t dc = devclass_find(driver->name); 701 driverlink_t dl; 702 device_t dev; 703 int i; 704 int error; 705 706 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 707 708 if (!dc) 709 return(0); 710 711 /* 712 * Find the link structure in the bus' list of drivers. 713 */ 714 TAILQ_FOREACH(dl, &busclass->drivers, link) 715 if (dl->driver == driver) 716 break; 717 718 if (!dl) { 719 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 720 return(ENOENT); 721 } 722 723 /* 724 * Disassociate from any devices. We iterate through all the 725 * devices in the devclass of the driver and detach any which are 726 * using the driver and which have a parent in the devclass which 727 * we are deleting from. 728 * 729 * Note that since a driver can be in multiple devclasses, we 730 * should not detach devices which are not children of devices in 731 * the affected devclass. 732 */ 733 for (i = 0; i < dc->maxunit; i++) 734 if (dc->devices[i]) { 735 dev = dc->devices[i]; 736 if (dev->driver == driver && dev->parent && 737 dev->parent->devclass == busclass) { 738 if ((error = device_detach(dev)) != 0) 739 return(error); 740 device_set_driver(dev, NULL); 741 } 742 } 743 744 TAILQ_REMOVE(&busclass->drivers, dl, link); 745 kfree(dl, M_BUS); 746 747 kobj_class_uninstantiate(driver); 748 749 bus_data_generation_update(); 750 return(0); 751 } 752 753 static driverlink_t 754 devclass_find_driver_internal(devclass_t dc, const char *classname) 755 { 756 driverlink_t dl; 757 758 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 759 760 TAILQ_FOREACH(dl, &dc->drivers, link) 761 if (!strcmp(dl->driver->name, classname)) 762 return(dl); 763 764 PDEBUG(("not found")); 765 return(NULL); 766 } 767 768 kobj_class_t 769 devclass_find_driver(devclass_t dc, const char *classname) 770 { 771 driverlink_t dl; 772 773 dl = devclass_find_driver_internal(dc, classname); 774 if (dl) 775 return(dl->driver); 776 else 777 return(NULL); 778 } 779 780 const char * 781 devclass_get_name(devclass_t dc) 782 { 783 return(dc->name); 784 } 785 786 device_t 787 devclass_get_device(devclass_t dc, int unit) 788 { 789 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 790 return(NULL); 791 return(dc->devices[unit]); 792 } 793 794 void * 795 devclass_get_softc(devclass_t dc, int unit) 796 { 797 device_t dev; 798 799 dev = devclass_get_device(dc, unit); 800 if (!dev) 801 return(NULL); 802 803 return(device_get_softc(dev)); 804 } 805 806 int 807 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 808 { 809 int i; 810 int count; 811 device_t *list; 812 813 count = 0; 814 for (i = 0; i < dc->maxunit; i++) 815 if (dc->devices[i]) 816 count++; 817 818 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 819 if (list == NULL) 820 return(ENOMEM); 821 822 count = 0; 823 for (i = 0; i < dc->maxunit; i++) 824 if (dc->devices[i]) { 825 list[count] = dc->devices[i]; 826 count++; 827 } 828 829 *devlistp = list; 830 *devcountp = count; 831 832 return(0); 833 } 834 835 /** 836 * @brief Get a list of drivers in the devclass 837 * 838 * An array containing a list of pointers to all the drivers in the 839 * given devclass is allocated and returned in @p *listp. The number 840 * of drivers in the array is returned in @p *countp. The caller should 841 * free the array using @c free(p, M_TEMP). 842 * 843 * @param dc the devclass to examine 844 * @param listp gives location for array pointer return value 845 * @param countp gives location for number of array elements 846 * return value 847 * 848 * @retval 0 success 849 * @retval ENOMEM the array allocation failed 850 */ 851 int 852 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp) 853 { 854 driverlink_t dl; 855 driver_t **list; 856 int count; 857 858 count = 0; 859 TAILQ_FOREACH(dl, &dc->drivers, link) 860 count++; 861 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT); 862 if (list == NULL) 863 return (ENOMEM); 864 865 count = 0; 866 TAILQ_FOREACH(dl, &dc->drivers, link) { 867 list[count] = dl->driver; 868 count++; 869 } 870 *listp = list; 871 *countp = count; 872 873 return (0); 874 } 875 876 /** 877 * @brief Get the number of devices in a devclass 878 * 879 * @param dc the devclass to examine 880 */ 881 int 882 devclass_get_count(devclass_t dc) 883 { 884 int count, i; 885 886 count = 0; 887 for (i = 0; i < dc->maxunit; i++) 888 if (dc->devices[i]) 889 count++; 890 return (count); 891 } 892 893 int 894 devclass_get_maxunit(devclass_t dc) 895 { 896 return(dc->maxunit); 897 } 898 899 void 900 devclass_set_parent(devclass_t dc, devclass_t pdc) 901 { 902 dc->parent = pdc; 903 } 904 905 devclass_t 906 devclass_get_parent(devclass_t dc) 907 { 908 return(dc->parent); 909 } 910 911 static int 912 devclass_alloc_unit(devclass_t dc, int *unitp) 913 { 914 int unit = *unitp; 915 916 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 917 918 /* If we have been given a wired unit number, check for existing device */ 919 if (unit != -1) { 920 if (unit >= 0 && unit < dc->maxunit && 921 dc->devices[unit] != NULL) { 922 if (bootverbose) 923 kprintf("%s-: %s%d exists, using next available unit number\n", 924 dc->name, dc->name, unit); 925 /* find the next available slot */ 926 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 927 ; 928 } 929 } else { 930 /* Unwired device, find the next available slot for it */ 931 unit = 0; 932 while (unit < dc->maxunit && dc->devices[unit] != NULL) 933 unit++; 934 } 935 936 /* 937 * We've selected a unit beyond the length of the table, so let's 938 * extend the table to make room for all units up to and including 939 * this one. 940 */ 941 if (unit >= dc->maxunit) { 942 device_t *newlist; 943 int newsize; 944 945 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 946 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS, 947 M_INTWAIT | M_ZERO); 948 if (newlist == NULL) 949 return(ENOMEM); 950 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 951 if (dc->devices) 952 kfree(dc->devices, M_BUS); 953 dc->devices = newlist; 954 dc->maxunit = newsize; 955 } 956 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 957 958 *unitp = unit; 959 return(0); 960 } 961 962 static int 963 devclass_add_device(devclass_t dc, device_t dev) 964 { 965 int buflen, error; 966 967 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 968 969 buflen = strlen(dc->name) + 5; 970 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 971 if (!dev->nameunit) 972 return(ENOMEM); 973 974 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 975 kfree(dev->nameunit, M_BUS); 976 dev->nameunit = NULL; 977 return(error); 978 } 979 dc->devices[dev->unit] = dev; 980 dev->devclass = dc; 981 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 982 983 return(0); 984 } 985 986 static int 987 devclass_delete_device(devclass_t dc, device_t dev) 988 { 989 if (!dc || !dev) 990 return(0); 991 992 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 993 994 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 995 panic("devclass_delete_device: inconsistent device class"); 996 dc->devices[dev->unit] = NULL; 997 if (dev->flags & DF_WILDCARD) 998 dev->unit = -1; 999 dev->devclass = NULL; 1000 kfree(dev->nameunit, M_BUS); 1001 dev->nameunit = NULL; 1002 1003 return(0); 1004 } 1005 1006 static device_t 1007 make_device(device_t parent, const char *name, int unit) 1008 { 1009 device_t dev; 1010 devclass_t dc; 1011 1012 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 1013 1014 if (name != NULL) { 1015 dc = devclass_find_internal(name, NULL, TRUE); 1016 if (!dc) { 1017 kprintf("make_device: can't find device class %s\n", name); 1018 return(NULL); 1019 } 1020 } else 1021 dc = NULL; 1022 1023 dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); 1024 if (!dev) 1025 return(0); 1026 1027 dev->parent = parent; 1028 TAILQ_INIT(&dev->children); 1029 kobj_init((kobj_t) dev, &null_class); 1030 dev->driver = NULL; 1031 dev->devclass = NULL; 1032 dev->unit = unit; 1033 dev->nameunit = NULL; 1034 dev->desc = NULL; 1035 dev->busy = 0; 1036 dev->devflags = 0; 1037 dev->flags = DF_ENABLED; 1038 dev->order = 0; 1039 if (unit == -1) 1040 dev->flags |= DF_WILDCARD; 1041 if (name) { 1042 dev->flags |= DF_FIXEDCLASS; 1043 if (devclass_add_device(dc, dev) != 0) { 1044 kobj_delete((kobj_t)dev, M_BUS); 1045 return(NULL); 1046 } 1047 } 1048 dev->ivars = NULL; 1049 dev->softc = NULL; 1050 1051 dev->state = DS_NOTPRESENT; 1052 1053 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 1054 bus_data_generation_update(); 1055 1056 return(dev); 1057 } 1058 1059 static int 1060 device_print_child(device_t dev, device_t child) 1061 { 1062 int retval = 0; 1063 1064 if (device_is_alive(child)) 1065 retval += BUS_PRINT_CHILD(dev, child); 1066 else 1067 retval += device_printf(child, " not found\n"); 1068 1069 return(retval); 1070 } 1071 1072 device_t 1073 device_add_child(device_t dev, const char *name, int unit) 1074 { 1075 return device_add_child_ordered(dev, 0, name, unit); 1076 } 1077 1078 device_t 1079 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 1080 { 1081 device_t child; 1082 device_t place; 1083 1084 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 1085 order, unit)); 1086 1087 child = make_device(dev, name, unit); 1088 if (child == NULL) 1089 return child; 1090 child->order = order; 1091 1092 TAILQ_FOREACH(place, &dev->children, link) 1093 if (place->order > order) 1094 break; 1095 1096 if (place) { 1097 /* 1098 * The device 'place' is the first device whose order is 1099 * greater than the new child. 1100 */ 1101 TAILQ_INSERT_BEFORE(place, child, link); 1102 } else { 1103 /* 1104 * The new child's order is greater or equal to the order of 1105 * any existing device. Add the child to the tail of the list. 1106 */ 1107 TAILQ_INSERT_TAIL(&dev->children, child, link); 1108 } 1109 1110 bus_data_generation_update(); 1111 return(child); 1112 } 1113 1114 int 1115 device_delete_child(device_t dev, device_t child) 1116 { 1117 int error; 1118 device_t grandchild; 1119 1120 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 1121 1122 /* remove children first */ 1123 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 1124 error = device_delete_child(child, grandchild); 1125 if (error) 1126 return(error); 1127 } 1128 1129 if ((error = device_detach(child)) != 0) 1130 return(error); 1131 if (child->devclass) 1132 devclass_delete_device(child->devclass, child); 1133 TAILQ_REMOVE(&dev->children, child, link); 1134 TAILQ_REMOVE(&bus_data_devices, child, devlink); 1135 device_set_desc(child, NULL); 1136 kobj_delete((kobj_t)child, M_BUS); 1137 1138 bus_data_generation_update(); 1139 return(0); 1140 } 1141 1142 /** 1143 * @brief Find a device given a unit number 1144 * 1145 * This is similar to devclass_get_devices() but only searches for 1146 * devices which have @p dev as a parent. 1147 * 1148 * @param dev the parent device to search 1149 * @param unit the unit number to search for. If the unit is -1, 1150 * return the first child of @p dev which has name 1151 * @p classname (that is, the one with the lowest unit.) 1152 * 1153 * @returns the device with the given unit number or @c 1154 * NULL if there is no such device 1155 */ 1156 device_t 1157 device_find_child(device_t dev, const char *classname, int unit) 1158 { 1159 devclass_t dc; 1160 device_t child; 1161 1162 dc = devclass_find(classname); 1163 if (!dc) 1164 return(NULL); 1165 1166 if (unit != -1) { 1167 child = devclass_get_device(dc, unit); 1168 if (child && child->parent == dev) 1169 return (child); 1170 } else { 1171 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) { 1172 child = devclass_get_device(dc, unit); 1173 if (child && child->parent == dev) 1174 return (child); 1175 } 1176 } 1177 return(NULL); 1178 } 1179 1180 static driverlink_t 1181 first_matching_driver(devclass_t dc, device_t dev) 1182 { 1183 if (dev->devclass) 1184 return(devclass_find_driver_internal(dc, dev->devclass->name)); 1185 else 1186 return(TAILQ_FIRST(&dc->drivers)); 1187 } 1188 1189 static driverlink_t 1190 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1191 { 1192 if (dev->devclass) { 1193 driverlink_t dl; 1194 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1195 if (!strcmp(dev->devclass->name, dl->driver->name)) 1196 return(dl); 1197 return(NULL); 1198 } else 1199 return(TAILQ_NEXT(last, link)); 1200 } 1201 1202 static int 1203 device_probe_child(device_t dev, device_t child) 1204 { 1205 devclass_t dc; 1206 driverlink_t best = 0; 1207 driverlink_t dl; 1208 int result, pri = 0; 1209 int hasclass = (child->devclass != 0); 1210 1211 dc = dev->devclass; 1212 if (!dc) 1213 panic("device_probe_child: parent device has no devclass"); 1214 1215 if (child->state == DS_ALIVE) 1216 return(0); 1217 1218 for (; dc; dc = dc->parent) { 1219 for (dl = first_matching_driver(dc, child); dl; 1220 dl = next_matching_driver(dc, child, dl)) { 1221 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1222 device_set_driver(child, dl->driver); 1223 if (!hasclass) 1224 device_set_devclass(child, dl->driver->name); 1225 result = DEVICE_PROBE(child); 1226 if (!hasclass) 1227 device_set_devclass(child, 0); 1228 1229 /* 1230 * If the driver returns SUCCESS, there can be 1231 * no higher match for this device. 1232 */ 1233 if (result == 0) { 1234 best = dl; 1235 pri = 0; 1236 break; 1237 } 1238 1239 /* 1240 * The driver returned an error so it 1241 * certainly doesn't match. 1242 */ 1243 if (result > 0) { 1244 device_set_driver(child, 0); 1245 continue; 1246 } 1247 1248 /* 1249 * A priority lower than SUCCESS, remember the 1250 * best matching driver. Initialise the value 1251 * of pri for the first match. 1252 */ 1253 if (best == 0 || result > pri) { 1254 best = dl; 1255 pri = result; 1256 continue; 1257 } 1258 } 1259 /* 1260 * If we have unambiguous match in this devclass, 1261 * don't look in the parent. 1262 */ 1263 if (best && pri == 0) 1264 break; 1265 } 1266 1267 /* 1268 * If we found a driver, change state and initialise the devclass. 1269 */ 1270 if (best) { 1271 if (!child->devclass) 1272 device_set_devclass(child, best->driver->name); 1273 device_set_driver(child, best->driver); 1274 if (pri < 0) { 1275 /* 1276 * A bit bogus. Call the probe method again to make 1277 * sure that we have the right description. 1278 */ 1279 DEVICE_PROBE(child); 1280 } 1281 1282 bus_data_generation_update(); 1283 child->state = DS_ALIVE; 1284 return(0); 1285 } 1286 1287 return(ENXIO); 1288 } 1289 1290 device_t 1291 device_get_parent(device_t dev) 1292 { 1293 return dev->parent; 1294 } 1295 1296 int 1297 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1298 { 1299 int count; 1300 device_t child; 1301 device_t *list; 1302 1303 count = 0; 1304 TAILQ_FOREACH(child, &dev->children, link) 1305 count++; 1306 1307 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 1308 if (!list) 1309 return(ENOMEM); 1310 1311 count = 0; 1312 TAILQ_FOREACH(child, &dev->children, link) { 1313 list[count] = child; 1314 count++; 1315 } 1316 1317 *devlistp = list; 1318 *devcountp = count; 1319 1320 return(0); 1321 } 1322 1323 driver_t * 1324 device_get_driver(device_t dev) 1325 { 1326 return(dev->driver); 1327 } 1328 1329 devclass_t 1330 device_get_devclass(device_t dev) 1331 { 1332 return(dev->devclass); 1333 } 1334 1335 const char * 1336 device_get_name(device_t dev) 1337 { 1338 if (dev->devclass) 1339 return devclass_get_name(dev->devclass); 1340 return(NULL); 1341 } 1342 1343 const char * 1344 device_get_nameunit(device_t dev) 1345 { 1346 return(dev->nameunit); 1347 } 1348 1349 int 1350 device_get_unit(device_t dev) 1351 { 1352 return(dev->unit); 1353 } 1354 1355 const char * 1356 device_get_desc(device_t dev) 1357 { 1358 return(dev->desc); 1359 } 1360 1361 uint32_t 1362 device_get_flags(device_t dev) 1363 { 1364 return(dev->devflags); 1365 } 1366 1367 int 1368 device_print_prettyname(device_t dev) 1369 { 1370 const char *name = device_get_name(dev); 1371 1372 if (name == 0) 1373 return kprintf("unknown: "); 1374 else 1375 return kprintf("%s%d: ", name, device_get_unit(dev)); 1376 } 1377 1378 int 1379 device_printf(device_t dev, const char * fmt, ...) 1380 { 1381 __va_list ap; 1382 int retval; 1383 1384 retval = device_print_prettyname(dev); 1385 __va_start(ap, fmt); 1386 retval += kvprintf(fmt, ap); 1387 __va_end(ap); 1388 return retval; 1389 } 1390 1391 static void 1392 device_set_desc_internal(device_t dev, const char* desc, int copy) 1393 { 1394 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1395 kfree(dev->desc, M_BUS); 1396 dev->flags &= ~DF_DESCMALLOCED; 1397 dev->desc = NULL; 1398 } 1399 1400 if (copy && desc) { 1401 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 1402 if (dev->desc) { 1403 strcpy(dev->desc, desc); 1404 dev->flags |= DF_DESCMALLOCED; 1405 } 1406 } else { 1407 /* Avoid a -Wcast-qual warning */ 1408 dev->desc = (char *)(uintptr_t) desc; 1409 } 1410 1411 bus_data_generation_update(); 1412 } 1413 1414 void 1415 device_set_desc(device_t dev, const char* desc) 1416 { 1417 device_set_desc_internal(dev, desc, FALSE); 1418 } 1419 1420 void 1421 device_set_desc_copy(device_t dev, const char* desc) 1422 { 1423 device_set_desc_internal(dev, desc, TRUE); 1424 } 1425 1426 void 1427 device_set_flags(device_t dev, uint32_t flags) 1428 { 1429 dev->devflags = flags; 1430 } 1431 1432 void * 1433 device_get_softc(device_t dev) 1434 { 1435 return dev->softc; 1436 } 1437 1438 void 1439 device_set_softc(device_t dev, void *softc) 1440 { 1441 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1442 kfree(dev->softc, M_BUS); 1443 dev->softc = softc; 1444 if (dev->softc) 1445 dev->flags |= DF_EXTERNALSOFTC; 1446 else 1447 dev->flags &= ~DF_EXTERNALSOFTC; 1448 } 1449 1450 void 1451 device_set_async_attach(device_t dev, int enable) 1452 { 1453 if (enable) 1454 dev->flags |= DF_ASYNCPROBE; 1455 else 1456 dev->flags &= ~DF_ASYNCPROBE; 1457 } 1458 1459 void * 1460 device_get_ivars(device_t dev) 1461 { 1462 return dev->ivars; 1463 } 1464 1465 void 1466 device_set_ivars(device_t dev, void * ivars) 1467 { 1468 if (!dev) 1469 return; 1470 1471 dev->ivars = ivars; 1472 } 1473 1474 device_state_t 1475 device_get_state(device_t dev) 1476 { 1477 return(dev->state); 1478 } 1479 1480 void 1481 device_enable(device_t dev) 1482 { 1483 dev->flags |= DF_ENABLED; 1484 } 1485 1486 void 1487 device_disable(device_t dev) 1488 { 1489 dev->flags &= ~DF_ENABLED; 1490 } 1491 1492 /* 1493 * YYY cannot block 1494 */ 1495 void 1496 device_busy(device_t dev) 1497 { 1498 if (dev->state < DS_ATTACHED) 1499 panic("device_busy: called for unattached device"); 1500 if (dev->busy == 0 && dev->parent) 1501 device_busy(dev->parent); 1502 dev->busy++; 1503 dev->state = DS_BUSY; 1504 } 1505 1506 /* 1507 * YYY cannot block 1508 */ 1509 void 1510 device_unbusy(device_t dev) 1511 { 1512 if (dev->state != DS_BUSY) 1513 panic("device_unbusy: called for non-busy device"); 1514 dev->busy--; 1515 if (dev->busy == 0) { 1516 if (dev->parent) 1517 device_unbusy(dev->parent); 1518 dev->state = DS_ATTACHED; 1519 } 1520 } 1521 1522 void 1523 device_quiet(device_t dev) 1524 { 1525 dev->flags |= DF_QUIET; 1526 } 1527 1528 void 1529 device_verbose(device_t dev) 1530 { 1531 dev->flags &= ~DF_QUIET; 1532 } 1533 1534 int 1535 device_is_quiet(device_t dev) 1536 { 1537 return((dev->flags & DF_QUIET) != 0); 1538 } 1539 1540 int 1541 device_is_enabled(device_t dev) 1542 { 1543 return((dev->flags & DF_ENABLED) != 0); 1544 } 1545 1546 int 1547 device_is_alive(device_t dev) 1548 { 1549 return(dev->state >= DS_ALIVE); 1550 } 1551 1552 int 1553 device_is_attached(device_t dev) 1554 { 1555 return(dev->state >= DS_ATTACHED); 1556 } 1557 1558 int 1559 device_set_devclass(device_t dev, const char *classname) 1560 { 1561 devclass_t dc; 1562 int error; 1563 1564 if (!classname) { 1565 if (dev->devclass) 1566 devclass_delete_device(dev->devclass, dev); 1567 return(0); 1568 } 1569 1570 if (dev->devclass) { 1571 kprintf("device_set_devclass: device class already set\n"); 1572 return(EINVAL); 1573 } 1574 1575 dc = devclass_find_internal(classname, NULL, TRUE); 1576 if (!dc) 1577 return(ENOMEM); 1578 1579 error = devclass_add_device(dc, dev); 1580 1581 bus_data_generation_update(); 1582 return(error); 1583 } 1584 1585 int 1586 device_set_driver(device_t dev, driver_t *driver) 1587 { 1588 if (dev->state >= DS_ATTACHED) 1589 return(EBUSY); 1590 1591 if (dev->driver == driver) 1592 return(0); 1593 1594 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1595 kfree(dev->softc, M_BUS); 1596 dev->softc = NULL; 1597 } 1598 kobj_delete((kobj_t) dev, 0); 1599 dev->driver = driver; 1600 if (driver) { 1601 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1602 if (!(dev->flags & DF_EXTERNALSOFTC)) { 1603 dev->softc = kmalloc(driver->size, M_BUS, 1604 M_INTWAIT | M_ZERO); 1605 if (!dev->softc) { 1606 kobj_delete((kobj_t)dev, 0); 1607 kobj_init((kobj_t) dev, &null_class); 1608 dev->driver = NULL; 1609 return(ENOMEM); 1610 } 1611 } 1612 } else { 1613 kobj_init((kobj_t) dev, &null_class); 1614 } 1615 1616 bus_data_generation_update(); 1617 return(0); 1618 } 1619 1620 int 1621 device_probe_and_attach(device_t dev) 1622 { 1623 device_t bus = dev->parent; 1624 int error = 0; 1625 1626 if (dev->state >= DS_ALIVE) 1627 return(0); 1628 1629 if ((dev->flags & DF_ENABLED) == 0) { 1630 if (bootverbose) { 1631 device_print_prettyname(dev); 1632 kprintf("not probed (disabled)\n"); 1633 } 1634 return(0); 1635 } 1636 1637 error = device_probe_child(bus, dev); 1638 if (error) { 1639 if (!(dev->flags & DF_DONENOMATCH)) { 1640 BUS_PROBE_NOMATCH(bus, dev); 1641 devnomatch(dev); 1642 dev->flags |= DF_DONENOMATCH; 1643 } 1644 return(error); 1645 } 1646 1647 /* 1648 * Output the exact device chain prior to the attach in case the 1649 * system locks up during attach, and generate the full info after 1650 * the attach so correct irq and other information is displayed. 1651 */ 1652 if (bootverbose && !device_is_quiet(dev)) { 1653 device_t tmp; 1654 1655 kprintf("%s", device_get_nameunit(dev)); 1656 for (tmp = dev->parent; tmp; tmp = tmp->parent) 1657 kprintf(".%s", device_get_nameunit(tmp)); 1658 kprintf("\n"); 1659 } 1660 if (!device_is_quiet(dev)) 1661 device_print_child(bus, dev); 1662 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) { 1663 kprintf("%s: probing asynchronously\n", 1664 device_get_nameunit(dev)); 1665 dev->state = DS_INPROGRESS; 1666 device_attach_async(dev); 1667 error = 0; 1668 } else { 1669 error = device_doattach(dev); 1670 } 1671 return(error); 1672 } 1673 1674 /* 1675 * Device is known to be alive, do the attach asynchronously. 1676 * However, serialize the attaches with the mp lock. 1677 */ 1678 static void 1679 device_attach_async(device_t dev) 1680 { 1681 thread_t td; 1682 1683 atomic_add_int(&numasyncthreads, 1); 1684 lwkt_create(device_attach_thread, dev, &td, NULL, 1685 0, 0, (dev->desc ? dev->desc : "devattach")); 1686 } 1687 1688 static void 1689 device_attach_thread(void *arg) 1690 { 1691 device_t dev = arg; 1692 1693 get_mplock(); /* XXX replace with devattach_token later */ 1694 (void)device_doattach(dev); 1695 atomic_subtract_int(&numasyncthreads, 1); 1696 wakeup(&numasyncthreads); 1697 rel_mplock(); /* XXX replace with devattach_token later */ 1698 } 1699 1700 /* 1701 * Device is known to be alive, do the attach (synchronous or asynchronous) 1702 */ 1703 static int 1704 device_doattach(device_t dev) 1705 { 1706 device_t bus = dev->parent; 1707 int hasclass = (dev->devclass != 0); 1708 int error; 1709 1710 error = DEVICE_ATTACH(dev); 1711 if (error == 0) { 1712 dev->state = DS_ATTACHED; 1713 if (bootverbose && !device_is_quiet(dev)) 1714 device_print_child(bus, dev); 1715 devadded(dev); 1716 } else { 1717 kprintf("device_probe_and_attach: %s%d attach returned %d\n", 1718 dev->driver->name, dev->unit, error); 1719 /* Unset the class that was set in device_probe_child */ 1720 if (!hasclass) 1721 device_set_devclass(dev, 0); 1722 device_set_driver(dev, NULL); 1723 dev->state = DS_NOTPRESENT; 1724 } 1725 return(error); 1726 } 1727 1728 int 1729 device_detach(device_t dev) 1730 { 1731 int error; 1732 1733 PDEBUG(("%s", DEVICENAME(dev))); 1734 if (dev->state == DS_BUSY) 1735 return(EBUSY); 1736 if (dev->state != DS_ATTACHED) 1737 return(0); 1738 1739 if ((error = DEVICE_DETACH(dev)) != 0) 1740 return(error); 1741 devremoved(dev); 1742 device_printf(dev, "detached\n"); 1743 if (dev->parent) 1744 BUS_CHILD_DETACHED(dev->parent, dev); 1745 1746 if (!(dev->flags & DF_FIXEDCLASS)) 1747 devclass_delete_device(dev->devclass, dev); 1748 1749 dev->state = DS_NOTPRESENT; 1750 device_set_driver(dev, NULL); 1751 1752 return(0); 1753 } 1754 1755 int 1756 device_shutdown(device_t dev) 1757 { 1758 if (dev->state < DS_ATTACHED) 1759 return 0; 1760 PDEBUG(("%s", DEVICENAME(dev))); 1761 return DEVICE_SHUTDOWN(dev); 1762 } 1763 1764 int 1765 device_set_unit(device_t dev, int unit) 1766 { 1767 devclass_t dc; 1768 int err; 1769 1770 dc = device_get_devclass(dev); 1771 if (unit < dc->maxunit && dc->devices[unit]) 1772 return(EBUSY); 1773 err = devclass_delete_device(dc, dev); 1774 if (err) 1775 return(err); 1776 dev->unit = unit; 1777 err = devclass_add_device(dc, dev); 1778 if (err) 1779 return(err); 1780 1781 bus_data_generation_update(); 1782 return(0); 1783 } 1784 1785 /*======================================*/ 1786 /* 1787 * Access functions for device resources. 1788 */ 1789 1790 /* Supplied by config(8) in ioconf.c */ 1791 extern struct config_device config_devtab[]; 1792 extern int devtab_count; 1793 1794 /* Runtime version */ 1795 struct config_device *devtab = config_devtab; 1796 1797 static int 1798 resource_new_name(const char *name, int unit) 1799 { 1800 struct config_device *new; 1801 1802 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP, 1803 M_INTWAIT | M_ZERO); 1804 if (new == NULL) 1805 return(-1); 1806 if (devtab && devtab_count > 0) 1807 bcopy(devtab, new, devtab_count * sizeof(*new)); 1808 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 1809 if (new[devtab_count].name == NULL) { 1810 kfree(new, M_TEMP); 1811 return(-1); 1812 } 1813 strcpy(new[devtab_count].name, name); 1814 new[devtab_count].unit = unit; 1815 new[devtab_count].resource_count = 0; 1816 new[devtab_count].resources = NULL; 1817 if (devtab && devtab != config_devtab) 1818 kfree(devtab, M_TEMP); 1819 devtab = new; 1820 return devtab_count++; 1821 } 1822 1823 static int 1824 resource_new_resname(int j, const char *resname, resource_type type) 1825 { 1826 struct config_resource *new; 1827 int i; 1828 1829 i = devtab[j].resource_count; 1830 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 1831 if (new == NULL) 1832 return(-1); 1833 if (devtab[j].resources && i > 0) 1834 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1835 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 1836 if (new[i].name == NULL) { 1837 kfree(new, M_TEMP); 1838 return(-1); 1839 } 1840 strcpy(new[i].name, resname); 1841 new[i].type = type; 1842 if (devtab[j].resources) 1843 kfree(devtab[j].resources, M_TEMP); 1844 devtab[j].resources = new; 1845 devtab[j].resource_count = i + 1; 1846 return(i); 1847 } 1848 1849 static int 1850 resource_match_string(int i, const char *resname, const char *value) 1851 { 1852 int j; 1853 struct config_resource *res; 1854 1855 for (j = 0, res = devtab[i].resources; 1856 j < devtab[i].resource_count; j++, res++) 1857 if (!strcmp(res->name, resname) 1858 && res->type == RES_STRING 1859 && !strcmp(res->u.stringval, value)) 1860 return(j); 1861 return(-1); 1862 } 1863 1864 static int 1865 resource_find(const char *name, int unit, const char *resname, 1866 struct config_resource **result) 1867 { 1868 int i, j; 1869 struct config_resource *res; 1870 1871 /* 1872 * First check specific instances, then generic. 1873 */ 1874 for (i = 0; i < devtab_count; i++) { 1875 if (devtab[i].unit < 0) 1876 continue; 1877 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1878 res = devtab[i].resources; 1879 for (j = 0; j < devtab[i].resource_count; j++, res++) 1880 if (!strcmp(res->name, resname)) { 1881 *result = res; 1882 return(0); 1883 } 1884 } 1885 } 1886 for (i = 0; i < devtab_count; i++) { 1887 if (devtab[i].unit >= 0) 1888 continue; 1889 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1890 /* XXX if so, then the generic match does nothing */ 1891 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1892 res = devtab[i].resources; 1893 for (j = 0; j < devtab[i].resource_count; j++, res++) 1894 if (!strcmp(res->name, resname)) { 1895 *result = res; 1896 return(0); 1897 } 1898 } 1899 } 1900 return(ENOENT); 1901 } 1902 1903 int 1904 resource_int_value(const char *name, int unit, const char *resname, int *result) 1905 { 1906 int error; 1907 struct config_resource *res; 1908 1909 if ((error = resource_find(name, unit, resname, &res)) != 0) 1910 return(error); 1911 if (res->type != RES_INT) 1912 return(EFTYPE); 1913 *result = res->u.intval; 1914 return(0); 1915 } 1916 1917 int 1918 resource_long_value(const char *name, int unit, const char *resname, 1919 long *result) 1920 { 1921 int error; 1922 struct config_resource *res; 1923 1924 if ((error = resource_find(name, unit, resname, &res)) != 0) 1925 return(error); 1926 if (res->type != RES_LONG) 1927 return(EFTYPE); 1928 *result = res->u.longval; 1929 return(0); 1930 } 1931 1932 int 1933 resource_string_value(const char *name, int unit, const char *resname, 1934 char **result) 1935 { 1936 int error; 1937 struct config_resource *res; 1938 1939 if ((error = resource_find(name, unit, resname, &res)) != 0) 1940 return(error); 1941 if (res->type != RES_STRING) 1942 return(EFTYPE); 1943 *result = res->u.stringval; 1944 return(0); 1945 } 1946 1947 int 1948 resource_query_string(int i, const char *resname, const char *value) 1949 { 1950 if (i < 0) 1951 i = 0; 1952 else 1953 i = i + 1; 1954 for (; i < devtab_count; i++) 1955 if (resource_match_string(i, resname, value) >= 0) 1956 return(i); 1957 return(-1); 1958 } 1959 1960 int 1961 resource_locate(int i, const char *resname) 1962 { 1963 if (i < 0) 1964 i = 0; 1965 else 1966 i = i + 1; 1967 for (; i < devtab_count; i++) 1968 if (!strcmp(devtab[i].name, resname)) 1969 return(i); 1970 return(-1); 1971 } 1972 1973 int 1974 resource_count(void) 1975 { 1976 return(devtab_count); 1977 } 1978 1979 char * 1980 resource_query_name(int i) 1981 { 1982 return(devtab[i].name); 1983 } 1984 1985 int 1986 resource_query_unit(int i) 1987 { 1988 return(devtab[i].unit); 1989 } 1990 1991 static int 1992 resource_create(const char *name, int unit, const char *resname, 1993 resource_type type, struct config_resource **result) 1994 { 1995 int i, j; 1996 struct config_resource *res = NULL; 1997 1998 for (i = 0; i < devtab_count; i++) 1999 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 2000 res = devtab[i].resources; 2001 break; 2002 } 2003 if (res == NULL) { 2004 i = resource_new_name(name, unit); 2005 if (i < 0) 2006 return(ENOMEM); 2007 res = devtab[i].resources; 2008 } 2009 for (j = 0; j < devtab[i].resource_count; j++, res++) 2010 if (!strcmp(res->name, resname)) { 2011 *result = res; 2012 return(0); 2013 } 2014 j = resource_new_resname(i, resname, type); 2015 if (j < 0) 2016 return(ENOMEM); 2017 res = &devtab[i].resources[j]; 2018 *result = res; 2019 return(0); 2020 } 2021 2022 int 2023 resource_set_int(const char *name, int unit, const char *resname, int value) 2024 { 2025 int error; 2026 struct config_resource *res; 2027 2028 error = resource_create(name, unit, resname, RES_INT, &res); 2029 if (error) 2030 return(error); 2031 if (res->type != RES_INT) 2032 return(EFTYPE); 2033 res->u.intval = value; 2034 return(0); 2035 } 2036 2037 int 2038 resource_set_long(const char *name, int unit, const char *resname, long value) 2039 { 2040 int error; 2041 struct config_resource *res; 2042 2043 error = resource_create(name, unit, resname, RES_LONG, &res); 2044 if (error) 2045 return(error); 2046 if (res->type != RES_LONG) 2047 return(EFTYPE); 2048 res->u.longval = value; 2049 return(0); 2050 } 2051 2052 int 2053 resource_set_string(const char *name, int unit, const char *resname, 2054 const char *value) 2055 { 2056 int error; 2057 struct config_resource *res; 2058 2059 error = resource_create(name, unit, resname, RES_STRING, &res); 2060 if (error) 2061 return(error); 2062 if (res->type != RES_STRING) 2063 return(EFTYPE); 2064 if (res->u.stringval) 2065 kfree(res->u.stringval, M_TEMP); 2066 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 2067 if (res->u.stringval == NULL) 2068 return(ENOMEM); 2069 strcpy(res->u.stringval, value); 2070 return(0); 2071 } 2072 2073 static void 2074 resource_cfgload(void *dummy __unused) 2075 { 2076 struct config_resource *res, *cfgres; 2077 int i, j; 2078 int error; 2079 char *name, *resname; 2080 int unit; 2081 resource_type type; 2082 char *stringval; 2083 int config_devtab_count; 2084 2085 config_devtab_count = devtab_count; 2086 devtab = NULL; 2087 devtab_count = 0; 2088 2089 for (i = 0; i < config_devtab_count; i++) { 2090 name = config_devtab[i].name; 2091 unit = config_devtab[i].unit; 2092 2093 for (j = 0; j < config_devtab[i].resource_count; j++) { 2094 cfgres = config_devtab[i].resources; 2095 resname = cfgres[j].name; 2096 type = cfgres[j].type; 2097 error = resource_create(name, unit, resname, type, 2098 &res); 2099 if (error) { 2100 kprintf("create resource %s%d: error %d\n", 2101 name, unit, error); 2102 continue; 2103 } 2104 if (res->type != type) { 2105 kprintf("type mismatch %s%d: %d != %d\n", 2106 name, unit, res->type, type); 2107 continue; 2108 } 2109 switch (type) { 2110 case RES_INT: 2111 res->u.intval = cfgres[j].u.intval; 2112 break; 2113 case RES_LONG: 2114 res->u.longval = cfgres[j].u.longval; 2115 break; 2116 case RES_STRING: 2117 if (res->u.stringval) 2118 kfree(res->u.stringval, M_TEMP); 2119 stringval = cfgres[j].u.stringval; 2120 res->u.stringval = kmalloc(strlen(stringval) + 1, 2121 M_TEMP, M_INTWAIT); 2122 if (res->u.stringval == NULL) 2123 break; 2124 strcpy(res->u.stringval, stringval); 2125 break; 2126 default: 2127 panic("unknown resource type %d", type); 2128 } 2129 } 2130 } 2131 } 2132 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0) 2133 2134 2135 /*======================================*/ 2136 /* 2137 * Some useful method implementations to make life easier for bus drivers. 2138 */ 2139 2140 void 2141 resource_list_init(struct resource_list *rl) 2142 { 2143 SLIST_INIT(rl); 2144 } 2145 2146 void 2147 resource_list_free(struct resource_list *rl) 2148 { 2149 struct resource_list_entry *rle; 2150 2151 while ((rle = SLIST_FIRST(rl)) != NULL) { 2152 if (rle->res) 2153 panic("resource_list_free: resource entry is busy"); 2154 SLIST_REMOVE_HEAD(rl, link); 2155 kfree(rle, M_BUS); 2156 } 2157 } 2158 2159 void 2160 resource_list_add(struct resource_list *rl, int type, int rid, 2161 u_long start, u_long end, u_long count, int cpuid) 2162 { 2163 struct resource_list_entry *rle; 2164 2165 rle = resource_list_find(rl, type, rid); 2166 if (rle == NULL) { 2167 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS, 2168 M_INTWAIT); 2169 if (!rle) 2170 panic("resource_list_add: can't record entry"); 2171 SLIST_INSERT_HEAD(rl, rle, link); 2172 rle->type = type; 2173 rle->rid = rid; 2174 rle->res = NULL; 2175 rle->cpuid = -1; 2176 } 2177 2178 if (rle->res) 2179 panic("resource_list_add: resource entry is busy"); 2180 2181 rle->start = start; 2182 rle->end = end; 2183 rle->count = count; 2184 2185 if (cpuid != -1) { 2186 if (rle->cpuid != -1 && rle->cpuid != cpuid) { 2187 panic("resource_list_add: moving from cpu%d -> cpu%d\n", 2188 rle->cpuid, cpuid); 2189 } 2190 rle->cpuid = cpuid; 2191 } 2192 } 2193 2194 struct resource_list_entry* 2195 resource_list_find(struct resource_list *rl, 2196 int type, int rid) 2197 { 2198 struct resource_list_entry *rle; 2199 2200 SLIST_FOREACH(rle, rl, link) 2201 if (rle->type == type && rle->rid == rid) 2202 return(rle); 2203 return(NULL); 2204 } 2205 2206 void 2207 resource_list_delete(struct resource_list *rl, 2208 int type, int rid) 2209 { 2210 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 2211 2212 if (rle) { 2213 if (rle->res != NULL) 2214 panic("resource_list_delete: resource has not been released"); 2215 SLIST_REMOVE(rl, rle, resource_list_entry, link); 2216 kfree(rle, M_BUS); 2217 } 2218 } 2219 2220 struct resource * 2221 resource_list_alloc(struct resource_list *rl, 2222 device_t bus, device_t child, 2223 int type, int *rid, 2224 u_long start, u_long end, 2225 u_long count, u_int flags, int cpuid) 2226 { 2227 struct resource_list_entry *rle = 0; 2228 int passthrough = (device_get_parent(child) != bus); 2229 int isdefault = (start == 0UL && end == ~0UL); 2230 2231 if (passthrough) { 2232 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2233 type, rid, 2234 start, end, count, flags, cpuid)); 2235 } 2236 2237 rle = resource_list_find(rl, type, *rid); 2238 2239 if (!rle) 2240 return(0); /* no resource of that type/rid */ 2241 2242 if (rle->res) 2243 panic("resource_list_alloc: resource entry is busy"); 2244 2245 if (isdefault) { 2246 start = rle->start; 2247 count = max(count, rle->count); 2248 end = max(rle->end, start + count - 1); 2249 } 2250 cpuid = rle->cpuid; 2251 2252 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2253 type, rid, start, end, count, 2254 flags, cpuid); 2255 2256 /* 2257 * Record the new range. 2258 */ 2259 if (rle->res) { 2260 rle->start = rman_get_start(rle->res); 2261 rle->end = rman_get_end(rle->res); 2262 rle->count = count; 2263 } 2264 2265 return(rle->res); 2266 } 2267 2268 int 2269 resource_list_release(struct resource_list *rl, 2270 device_t bus, device_t child, 2271 int type, int rid, struct resource *res) 2272 { 2273 struct resource_list_entry *rle = 0; 2274 int passthrough = (device_get_parent(child) != bus); 2275 int error; 2276 2277 if (passthrough) { 2278 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2279 type, rid, res)); 2280 } 2281 2282 rle = resource_list_find(rl, type, rid); 2283 2284 if (!rle) 2285 panic("resource_list_release: can't find resource"); 2286 if (!rle->res) 2287 panic("resource_list_release: resource entry is not busy"); 2288 2289 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2290 type, rid, res); 2291 if (error) 2292 return(error); 2293 2294 rle->res = NULL; 2295 return(0); 2296 } 2297 2298 int 2299 resource_list_print_type(struct resource_list *rl, const char *name, int type, 2300 const char *format) 2301 { 2302 struct resource_list_entry *rle; 2303 int printed, retval; 2304 2305 printed = 0; 2306 retval = 0; 2307 /* Yes, this is kinda cheating */ 2308 SLIST_FOREACH(rle, rl, link) { 2309 if (rle->type == type) { 2310 if (printed == 0) 2311 retval += kprintf(" %s ", name); 2312 else 2313 retval += kprintf(","); 2314 printed++; 2315 retval += kprintf(format, rle->start); 2316 if (rle->count > 1) { 2317 retval += kprintf("-"); 2318 retval += kprintf(format, rle->start + 2319 rle->count - 1); 2320 } 2321 } 2322 } 2323 return(retval); 2324 } 2325 2326 /* 2327 * Generic driver/device identify functions. These will install a device 2328 * rendezvous point under the parent using the same name as the driver 2329 * name, which will at a later time be probed and attached. 2330 * 2331 * These functions are used when the parent does not 'scan' its bus for 2332 * matching devices, or for the particular devices using these functions, 2333 * or when the device is a pseudo or synthesized device (such as can be 2334 * found under firewire and ppbus). 2335 */ 2336 int 2337 bus_generic_identify(driver_t *driver, device_t parent) 2338 { 2339 if (parent->state == DS_ATTACHED) 2340 return (0); 2341 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); 2342 return (0); 2343 } 2344 2345 int 2346 bus_generic_identify_sameunit(driver_t *driver, device_t parent) 2347 { 2348 if (parent->state == DS_ATTACHED) 2349 return (0); 2350 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); 2351 return (0); 2352 } 2353 2354 /* 2355 * Call DEVICE_IDENTIFY for each driver. 2356 */ 2357 int 2358 bus_generic_probe(device_t dev) 2359 { 2360 devclass_t dc = dev->devclass; 2361 driverlink_t dl; 2362 2363 TAILQ_FOREACH(dl, &dc->drivers, link) { 2364 DEVICE_IDENTIFY(dl->driver, dev); 2365 } 2366 2367 return(0); 2368 } 2369 2370 /* 2371 * This is an aweful hack due to the isa bus and autoconf code not 2372 * probing the ISA devices until after everything else has configured. 2373 * The ISA bus did a dummy attach long ago so we have to set it back 2374 * to an earlier state so the probe thinks its the initial probe and 2375 * not a bus rescan. 2376 * 2377 * XXX remove by properly defering the ISA bus scan. 2378 */ 2379 int 2380 bus_generic_probe_hack(device_t dev) 2381 { 2382 if (dev->state == DS_ATTACHED) { 2383 dev->state = DS_ALIVE; 2384 bus_generic_probe(dev); 2385 dev->state = DS_ATTACHED; 2386 } 2387 return (0); 2388 } 2389 2390 int 2391 bus_generic_attach(device_t dev) 2392 { 2393 device_t child; 2394 2395 TAILQ_FOREACH(child, &dev->children, link) { 2396 device_probe_and_attach(child); 2397 } 2398 2399 return(0); 2400 } 2401 2402 int 2403 bus_generic_detach(device_t dev) 2404 { 2405 device_t child; 2406 int error; 2407 2408 if (dev->state != DS_ATTACHED) 2409 return(EBUSY); 2410 2411 TAILQ_FOREACH(child, &dev->children, link) 2412 if ((error = device_detach(child)) != 0) 2413 return(error); 2414 2415 return 0; 2416 } 2417 2418 int 2419 bus_generic_shutdown(device_t dev) 2420 { 2421 device_t child; 2422 2423 TAILQ_FOREACH(child, &dev->children, link) 2424 device_shutdown(child); 2425 2426 return(0); 2427 } 2428 2429 int 2430 bus_generic_suspend(device_t dev) 2431 { 2432 int error; 2433 device_t child, child2; 2434 2435 TAILQ_FOREACH(child, &dev->children, link) { 2436 error = DEVICE_SUSPEND(child); 2437 if (error) { 2438 for (child2 = TAILQ_FIRST(&dev->children); 2439 child2 && child2 != child; 2440 child2 = TAILQ_NEXT(child2, link)) 2441 DEVICE_RESUME(child2); 2442 return(error); 2443 } 2444 } 2445 return(0); 2446 } 2447 2448 int 2449 bus_generic_resume(device_t dev) 2450 { 2451 device_t child; 2452 2453 TAILQ_FOREACH(child, &dev->children, link) 2454 DEVICE_RESUME(child); 2455 /* if resume fails, there's nothing we can usefully do... */ 2456 2457 return(0); 2458 } 2459 2460 int 2461 bus_print_child_header(device_t dev, device_t child) 2462 { 2463 int retval = 0; 2464 2465 if (device_get_desc(child)) 2466 retval += device_printf(child, "<%s>", device_get_desc(child)); 2467 else 2468 retval += kprintf("%s", device_get_nameunit(child)); 2469 if (bootverbose) { 2470 if (child->state != DS_ATTACHED) 2471 kprintf(" [tentative]"); 2472 else 2473 kprintf(" [attached!]"); 2474 } 2475 return(retval); 2476 } 2477 2478 int 2479 bus_print_child_footer(device_t dev, device_t child) 2480 { 2481 return(kprintf(" on %s\n", device_get_nameunit(dev))); 2482 } 2483 2484 device_t 2485 bus_generic_add_child(device_t dev, device_t child, int order, 2486 const char *name, int unit) 2487 { 2488 if (dev->parent) 2489 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); 2490 else 2491 dev = device_add_child_ordered(child, order, name, unit); 2492 return(dev); 2493 2494 } 2495 2496 int 2497 bus_generic_print_child(device_t dev, device_t child) 2498 { 2499 int retval = 0; 2500 2501 retval += bus_print_child_header(dev, child); 2502 retval += bus_print_child_footer(dev, child); 2503 2504 return(retval); 2505 } 2506 2507 int 2508 bus_generic_read_ivar(device_t dev, device_t child, int index, 2509 uintptr_t * result) 2510 { 2511 int error; 2512 2513 if (dev->parent) 2514 error = BUS_READ_IVAR(dev->parent, child, index, result); 2515 else 2516 error = ENOENT; 2517 return (error); 2518 } 2519 2520 int 2521 bus_generic_write_ivar(device_t dev, device_t child, int index, 2522 uintptr_t value) 2523 { 2524 int error; 2525 2526 if (dev->parent) 2527 error = BUS_WRITE_IVAR(dev->parent, child, index, value); 2528 else 2529 error = ENOENT; 2530 return (error); 2531 } 2532 2533 /* 2534 * Resource list are used for iterations, do not recurse. 2535 */ 2536 struct resource_list * 2537 bus_generic_get_resource_list(device_t dev, device_t child) 2538 { 2539 return (NULL); 2540 } 2541 2542 void 2543 bus_generic_driver_added(device_t dev, driver_t *driver) 2544 { 2545 device_t child; 2546 2547 DEVICE_IDENTIFY(driver, dev); 2548 TAILQ_FOREACH(child, &dev->children, link) { 2549 if (child->state == DS_NOTPRESENT) 2550 device_probe_and_attach(child); 2551 } 2552 } 2553 2554 int 2555 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 2556 int flags, driver_intr_t *intr, void *arg, 2557 void **cookiep, lwkt_serialize_t serializer) 2558 { 2559 /* Propagate up the bus hierarchy until someone handles it. */ 2560 if (dev->parent) 2561 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 2562 intr, arg, cookiep, serializer)); 2563 else 2564 return(EINVAL); 2565 } 2566 2567 int 2568 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 2569 void *cookie) 2570 { 2571 /* Propagate up the bus hierarchy until someone handles it. */ 2572 if (dev->parent) 2573 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 2574 else 2575 return(EINVAL); 2576 } 2577 2578 int 2579 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 2580 { 2581 if (dev->parent) 2582 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 2583 else 2584 return(0); 2585 } 2586 2587 void 2588 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 2589 { 2590 if (dev->parent) 2591 BUS_ENABLE_INTR(dev->parent, child, cookie); 2592 } 2593 2594 int 2595 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig, 2596 enum intr_polarity pol) 2597 { 2598 /* Propagate up the bus hierarchy until someone handles it. */ 2599 if (dev->parent) 2600 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol)); 2601 else 2602 return(EINVAL); 2603 } 2604 2605 struct resource * 2606 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 2607 u_long start, u_long end, u_long count, u_int flags, int cpuid) 2608 { 2609 /* Propagate up the bus hierarchy until someone handles it. */ 2610 if (dev->parent) 2611 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 2612 start, end, count, flags, cpuid)); 2613 else 2614 return(NULL); 2615 } 2616 2617 int 2618 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2619 struct resource *r) 2620 { 2621 /* Propagate up the bus hierarchy until someone handles it. */ 2622 if (dev->parent) 2623 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 2624 else 2625 return(EINVAL); 2626 } 2627 2628 int 2629 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2630 struct resource *r) 2631 { 2632 /* Propagate up the bus hierarchy until someone handles it. */ 2633 if (dev->parent) 2634 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 2635 else 2636 return(EINVAL); 2637 } 2638 2639 int 2640 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2641 int rid, struct resource *r) 2642 { 2643 /* Propagate up the bus hierarchy until someone handles it. */ 2644 if (dev->parent) 2645 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2646 r)); 2647 else 2648 return(EINVAL); 2649 } 2650 2651 int 2652 bus_generic_get_resource(device_t dev, device_t child, int type, int rid, 2653 u_long *startp, u_long *countp) 2654 { 2655 int error; 2656 2657 error = ENOENT; 2658 if (dev->parent) { 2659 error = BUS_GET_RESOURCE(dev->parent, child, type, rid, 2660 startp, countp); 2661 } 2662 return (error); 2663 } 2664 2665 int 2666 bus_generic_set_resource(device_t dev, device_t child, int type, int rid, 2667 u_long start, u_long count, int cpuid) 2668 { 2669 int error; 2670 2671 error = EINVAL; 2672 if (dev->parent) { 2673 error = BUS_SET_RESOURCE(dev->parent, child, type, rid, 2674 start, count, cpuid); 2675 } 2676 return (error); 2677 } 2678 2679 void 2680 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) 2681 { 2682 if (dev->parent) 2683 BUS_DELETE_RESOURCE(dev, child, type, rid); 2684 } 2685 2686 int 2687 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2688 u_long *startp, u_long *countp) 2689 { 2690 struct resource_list *rl = NULL; 2691 struct resource_list_entry *rle = NULL; 2692 2693 rl = BUS_GET_RESOURCE_LIST(dev, child); 2694 if (!rl) 2695 return(EINVAL); 2696 2697 rle = resource_list_find(rl, type, rid); 2698 if (!rle) 2699 return(ENOENT); 2700 2701 if (startp) 2702 *startp = rle->start; 2703 if (countp) 2704 *countp = rle->count; 2705 2706 return(0); 2707 } 2708 2709 int 2710 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2711 u_long start, u_long count, int cpuid) 2712 { 2713 struct resource_list *rl = NULL; 2714 2715 rl = BUS_GET_RESOURCE_LIST(dev, child); 2716 if (!rl) 2717 return(EINVAL); 2718 2719 resource_list_add(rl, type, rid, start, (start + count - 1), count, 2720 cpuid); 2721 2722 return(0); 2723 } 2724 2725 void 2726 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2727 { 2728 struct resource_list *rl = NULL; 2729 2730 rl = BUS_GET_RESOURCE_LIST(dev, child); 2731 if (!rl) 2732 return; 2733 2734 resource_list_delete(rl, type, rid); 2735 } 2736 2737 int 2738 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2739 int rid, struct resource *r) 2740 { 2741 struct resource_list *rl = NULL; 2742 2743 rl = BUS_GET_RESOURCE_LIST(dev, child); 2744 if (!rl) 2745 return(EINVAL); 2746 2747 return(resource_list_release(rl, dev, child, type, rid, r)); 2748 } 2749 2750 struct resource * 2751 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2752 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid) 2753 { 2754 struct resource_list *rl = NULL; 2755 2756 rl = BUS_GET_RESOURCE_LIST(dev, child); 2757 if (!rl) 2758 return(NULL); 2759 2760 return(resource_list_alloc(rl, dev, child, type, rid, 2761 start, end, count, flags, cpuid)); 2762 } 2763 2764 int 2765 bus_generic_child_present(device_t bus, device_t child) 2766 { 2767 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2768 } 2769 2770 2771 /* 2772 * Some convenience functions to make it easier for drivers to use the 2773 * resource-management functions. All these really do is hide the 2774 * indirection through the parent's method table, making for slightly 2775 * less-wordy code. In the future, it might make sense for this code 2776 * to maintain some sort of a list of resources allocated by each device. 2777 */ 2778 int 2779 bus_alloc_resources(device_t dev, struct resource_spec *rs, 2780 struct resource **res) 2781 { 2782 int i; 2783 2784 for (i = 0; rs[i].type != -1; i++) 2785 res[i] = NULL; 2786 for (i = 0; rs[i].type != -1; i++) { 2787 res[i] = bus_alloc_resource_any(dev, 2788 rs[i].type, &rs[i].rid, rs[i].flags); 2789 if (res[i] == NULL) { 2790 bus_release_resources(dev, rs, res); 2791 return (ENXIO); 2792 } 2793 } 2794 return (0); 2795 } 2796 2797 void 2798 bus_release_resources(device_t dev, const struct resource_spec *rs, 2799 struct resource **res) 2800 { 2801 int i; 2802 2803 for (i = 0; rs[i].type != -1; i++) 2804 if (res[i] != NULL) { 2805 bus_release_resource( 2806 dev, rs[i].type, rs[i].rid, res[i]); 2807 res[i] = NULL; 2808 } 2809 } 2810 2811 struct resource * 2812 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2813 u_long count, u_int flags) 2814 { 2815 if (dev->parent == 0) 2816 return(0); 2817 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2818 count, flags, -1)); 2819 } 2820 2821 struct resource * 2822 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags) 2823 { 2824 if (dev->parent == 0) 2825 return(0); 2826 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid, 2827 irq, irq, 1, flags, machintr_intr_cpuid(irq)); 2828 } 2829 2830 int 2831 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2832 { 2833 if (dev->parent == 0) 2834 return(EINVAL); 2835 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2836 } 2837 2838 int 2839 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2840 { 2841 if (dev->parent == 0) 2842 return(EINVAL); 2843 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2844 } 2845 2846 int 2847 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2848 { 2849 if (dev->parent == 0) 2850 return(EINVAL); 2851 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2852 } 2853 2854 int 2855 bus_setup_intr(device_t dev, struct resource *r, int flags, 2856 driver_intr_t handler, void *arg, 2857 void **cookiep, lwkt_serialize_t serializer) 2858 { 2859 if (dev->parent == 0) 2860 return(EINVAL); 2861 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2862 cookiep, serializer)); 2863 } 2864 2865 int 2866 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2867 { 2868 if (dev->parent == 0) 2869 return(EINVAL); 2870 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2871 } 2872 2873 void 2874 bus_enable_intr(device_t dev, void *cookie) 2875 { 2876 if (dev->parent) 2877 BUS_ENABLE_INTR(dev->parent, dev, cookie); 2878 } 2879 2880 int 2881 bus_disable_intr(device_t dev, void *cookie) 2882 { 2883 if (dev->parent) 2884 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 2885 else 2886 return(0); 2887 } 2888 2889 int 2890 bus_set_resource(device_t dev, int type, int rid, 2891 u_long start, u_long count, int cpuid) 2892 { 2893 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2894 start, count, cpuid)); 2895 } 2896 2897 int 2898 bus_get_resource(device_t dev, int type, int rid, 2899 u_long *startp, u_long *countp) 2900 { 2901 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2902 startp, countp)); 2903 } 2904 2905 u_long 2906 bus_get_resource_start(device_t dev, int type, int rid) 2907 { 2908 u_long start, count; 2909 int error; 2910 2911 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2912 &start, &count); 2913 if (error) 2914 return(0); 2915 return(start); 2916 } 2917 2918 u_long 2919 bus_get_resource_count(device_t dev, int type, int rid) 2920 { 2921 u_long start, count; 2922 int error; 2923 2924 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2925 &start, &count); 2926 if (error) 2927 return(0); 2928 return(count); 2929 } 2930 2931 void 2932 bus_delete_resource(device_t dev, int type, int rid) 2933 { 2934 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2935 } 2936 2937 int 2938 bus_child_present(device_t child) 2939 { 2940 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2941 } 2942 2943 int 2944 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2945 { 2946 device_t parent; 2947 2948 parent = device_get_parent(child); 2949 if (parent == NULL) { 2950 *buf = '\0'; 2951 return (0); 2952 } 2953 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2954 } 2955 2956 int 2957 bus_child_location_str(device_t child, char *buf, size_t buflen) 2958 { 2959 device_t parent; 2960 2961 parent = device_get_parent(child); 2962 if (parent == NULL) { 2963 *buf = '\0'; 2964 return (0); 2965 } 2966 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2967 } 2968 2969 static int 2970 root_print_child(device_t dev, device_t child) 2971 { 2972 return(0); 2973 } 2974 2975 static int 2976 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2977 void **cookiep, lwkt_serialize_t serializer) 2978 { 2979 /* 2980 * If an interrupt mapping gets to here something bad has happened. 2981 */ 2982 panic("root_setup_intr"); 2983 } 2984 2985 /* 2986 * If we get here, assume that the device is permanant and really is 2987 * present in the system. Removable bus drivers are expected to intercept 2988 * this call long before it gets here. We return -1 so that drivers that 2989 * really care can check vs -1 or some ERRNO returned higher in the food 2990 * chain. 2991 */ 2992 static int 2993 root_child_present(device_t dev, device_t child) 2994 { 2995 return(-1); 2996 } 2997 2998 /* 2999 * XXX NOTE! other defaults may be set in bus_if.m 3000 */ 3001 static kobj_method_t root_methods[] = { 3002 /* Device interface */ 3003 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 3004 KOBJMETHOD(device_suspend, bus_generic_suspend), 3005 KOBJMETHOD(device_resume, bus_generic_resume), 3006 3007 /* Bus interface */ 3008 KOBJMETHOD(bus_add_child, bus_generic_add_child), 3009 KOBJMETHOD(bus_print_child, root_print_child), 3010 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 3011 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 3012 KOBJMETHOD(bus_setup_intr, root_setup_intr), 3013 KOBJMETHOD(bus_child_present, root_child_present), 3014 3015 { 0, 0 } 3016 }; 3017 3018 static driver_t root_driver = { 3019 "root", 3020 root_methods, 3021 1, /* no softc */ 3022 }; 3023 3024 device_t root_bus; 3025 devclass_t root_devclass; 3026 3027 static int 3028 root_bus_module_handler(module_t mod, int what, void* arg) 3029 { 3030 switch (what) { 3031 case MOD_LOAD: 3032 TAILQ_INIT(&bus_data_devices); 3033 root_bus = make_device(NULL, "root", 0); 3034 root_bus->desc = "System root bus"; 3035 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 3036 root_bus->driver = &root_driver; 3037 root_bus->state = DS_ALIVE; 3038 root_devclass = devclass_find_internal("root", NULL, FALSE); 3039 devinit(); 3040 return(0); 3041 3042 case MOD_SHUTDOWN: 3043 device_shutdown(root_bus); 3044 return(0); 3045 default: 3046 return(0); 3047 } 3048 } 3049 3050 static moduledata_t root_bus_mod = { 3051 "rootbus", 3052 root_bus_module_handler, 3053 0 3054 }; 3055 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 3056 3057 void 3058 root_bus_configure(void) 3059 { 3060 int warncount; 3061 device_t dev; 3062 3063 PDEBUG((".")); 3064 3065 /* 3066 * handle device_identify based device attachments to the root_bus 3067 * (typically nexus). 3068 */ 3069 bus_generic_probe(root_bus); 3070 3071 /* 3072 * Probe and attach the devices under root_bus. 3073 */ 3074 TAILQ_FOREACH(dev, &root_bus->children, link) { 3075 device_probe_and_attach(dev); 3076 } 3077 3078 /* 3079 * Wait for all asynchronous attaches to complete. If we don't 3080 * our legacy ISA bus scan could steal device unit numbers or 3081 * even I/O ports. 3082 */ 3083 warncount = 10; 3084 if (numasyncthreads) 3085 kprintf("Waiting for async drivers to attach\n"); 3086 while (numasyncthreads > 0) { 3087 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK) 3088 --warncount; 3089 if (warncount == 0) { 3090 kprintf("Warning: Still waiting for %d " 3091 "drivers to attach\n", numasyncthreads); 3092 } else if (warncount == -30) { 3093 kprintf("Giving up on %d drivers\n", numasyncthreads); 3094 break; 3095 } 3096 } 3097 root_bus->state = DS_ATTACHED; 3098 } 3099 3100 int 3101 driver_module_handler(module_t mod, int what, void *arg) 3102 { 3103 int error; 3104 struct driver_module_data *dmd; 3105 devclass_t bus_devclass; 3106 kobj_class_t driver; 3107 const char *parentname; 3108 3109 dmd = (struct driver_module_data *)arg; 3110 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 3111 error = 0; 3112 3113 switch (what) { 3114 case MOD_LOAD: 3115 if (dmd->dmd_chainevh) 3116 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3117 3118 driver = dmd->dmd_driver; 3119 PDEBUG(("Loading module: driver %s on bus %s", 3120 DRIVERNAME(driver), dmd->dmd_busname)); 3121 3122 /* 3123 * If the driver has any base classes, make the 3124 * devclass inherit from the devclass of the driver's 3125 * first base class. This will allow the system to 3126 * search for drivers in both devclasses for children 3127 * of a device using this driver. 3128 */ 3129 if (driver->baseclasses) 3130 parentname = driver->baseclasses[0]->name; 3131 else 3132 parentname = NULL; 3133 *dmd->dmd_devclass = devclass_find_internal(driver->name, 3134 parentname, TRUE); 3135 3136 error = devclass_add_driver(bus_devclass, driver); 3137 if (error) 3138 break; 3139 break; 3140 3141 case MOD_UNLOAD: 3142 PDEBUG(("Unloading module: driver %s from bus %s", 3143 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 3144 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 3145 3146 if (!error && dmd->dmd_chainevh) 3147 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3148 break; 3149 } 3150 3151 return (error); 3152 } 3153 3154 #ifdef BUS_DEBUG 3155 3156 /* 3157 * The _short versions avoid iteration by not calling anything that prints 3158 * more than oneliners. I love oneliners. 3159 */ 3160 3161 static void 3162 print_device_short(device_t dev, int indent) 3163 { 3164 if (!dev) 3165 return; 3166 3167 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 3168 dev->unit, dev->desc, 3169 (dev->parent? "":"no "), 3170 (TAILQ_EMPTY(&dev->children)? "no ":""), 3171 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 3172 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 3173 (dev->flags&DF_WILDCARD? "wildcard,":""), 3174 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 3175 (dev->ivars? "":"no "), 3176 (dev->softc? "":"no "), 3177 dev->busy)); 3178 } 3179 3180 static void 3181 print_device(device_t dev, int indent) 3182 { 3183 if (!dev) 3184 return; 3185 3186 print_device_short(dev, indent); 3187 3188 indentprintf(("Parent:\n")); 3189 print_device_short(dev->parent, indent+1); 3190 indentprintf(("Driver:\n")); 3191 print_driver_short(dev->driver, indent+1); 3192 indentprintf(("Devclass:\n")); 3193 print_devclass_short(dev->devclass, indent+1); 3194 } 3195 3196 /* 3197 * Print the device and all its children (indented). 3198 */ 3199 void 3200 print_device_tree_short(device_t dev, int indent) 3201 { 3202 device_t child; 3203 3204 if (!dev) 3205 return; 3206 3207 print_device_short(dev, indent); 3208 3209 TAILQ_FOREACH(child, &dev->children, link) 3210 print_device_tree_short(child, indent+1); 3211 } 3212 3213 /* 3214 * Print the device and all its children (indented). 3215 */ 3216 void 3217 print_device_tree(device_t dev, int indent) 3218 { 3219 device_t child; 3220 3221 if (!dev) 3222 return; 3223 3224 print_device(dev, indent); 3225 3226 TAILQ_FOREACH(child, &dev->children, link) 3227 print_device_tree(child, indent+1); 3228 } 3229 3230 static void 3231 print_driver_short(driver_t *driver, int indent) 3232 { 3233 if (!driver) 3234 return; 3235 3236 indentprintf(("driver %s: softc size = %zu\n", 3237 driver->name, driver->size)); 3238 } 3239 3240 static void 3241 print_driver(driver_t *driver, int indent) 3242 { 3243 if (!driver) 3244 return; 3245 3246 print_driver_short(driver, indent); 3247 } 3248 3249 3250 static void 3251 print_driver_list(driver_list_t drivers, int indent) 3252 { 3253 driverlink_t driver; 3254 3255 TAILQ_FOREACH(driver, &drivers, link) 3256 print_driver(driver->driver, indent); 3257 } 3258 3259 static void 3260 print_devclass_short(devclass_t dc, int indent) 3261 { 3262 if (!dc) 3263 return; 3264 3265 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 3266 } 3267 3268 static void 3269 print_devclass(devclass_t dc, int indent) 3270 { 3271 int i; 3272 3273 if (!dc) 3274 return; 3275 3276 print_devclass_short(dc, indent); 3277 indentprintf(("Drivers:\n")); 3278 print_driver_list(dc->drivers, indent+1); 3279 3280 indentprintf(("Devices:\n")); 3281 for (i = 0; i < dc->maxunit; i++) 3282 if (dc->devices[i]) 3283 print_device(dc->devices[i], indent+1); 3284 } 3285 3286 void 3287 print_devclass_list_short(void) 3288 { 3289 devclass_t dc; 3290 3291 kprintf("Short listing of devclasses, drivers & devices:\n"); 3292 TAILQ_FOREACH(dc, &devclasses, link) { 3293 print_devclass_short(dc, 0); 3294 } 3295 } 3296 3297 void 3298 print_devclass_list(void) 3299 { 3300 devclass_t dc; 3301 3302 kprintf("Full listing of devclasses, drivers & devices:\n"); 3303 TAILQ_FOREACH(dc, &devclasses, link) { 3304 print_devclass(dc, 0); 3305 } 3306 } 3307 3308 #endif 3309 3310 /* 3311 * Check to see if a device is disabled via a disabled hint. 3312 */ 3313 int 3314 resource_disabled(const char *name, int unit) 3315 { 3316 int error, value; 3317 3318 error = resource_int_value(name, unit, "disabled", &value); 3319 if (error) 3320 return(0); 3321 return(value); 3322 } 3323 3324 /* 3325 * User-space access to the device tree. 3326 * 3327 * We implement a small set of nodes: 3328 * 3329 * hw.bus Single integer read method to obtain the 3330 * current generation count. 3331 * hw.bus.devices Reads the entire device tree in flat space. 3332 * hw.bus.rman Resource manager interface 3333 * 3334 * We might like to add the ability to scan devclasses and/or drivers to 3335 * determine what else is currently loaded/available. 3336 */ 3337 3338 static int 3339 sysctl_bus(SYSCTL_HANDLER_ARGS) 3340 { 3341 struct u_businfo ubus; 3342 3343 ubus.ub_version = BUS_USER_VERSION; 3344 ubus.ub_generation = bus_data_generation; 3345 3346 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 3347 } 3348 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 3349 "bus-related data"); 3350 3351 static int 3352 sysctl_devices(SYSCTL_HANDLER_ARGS) 3353 { 3354 int *name = (int *)arg1; 3355 u_int namelen = arg2; 3356 int index; 3357 struct device *dev; 3358 struct u_device udev; /* XXX this is a bit big */ 3359 int error; 3360 3361 if (namelen != 2) 3362 return (EINVAL); 3363 3364 if (bus_data_generation_check(name[0])) 3365 return (EINVAL); 3366 3367 index = name[1]; 3368 3369 /* 3370 * Scan the list of devices, looking for the requested index. 3371 */ 3372 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 3373 if (index-- == 0) 3374 break; 3375 } 3376 if (dev == NULL) 3377 return (ENOENT); 3378 3379 /* 3380 * Populate the return array. 3381 */ 3382 bzero(&udev, sizeof(udev)); 3383 udev.dv_handle = (uintptr_t)dev; 3384 udev.dv_parent = (uintptr_t)dev->parent; 3385 if (dev->nameunit != NULL) 3386 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 3387 if (dev->desc != NULL) 3388 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 3389 if (dev->driver != NULL && dev->driver->name != NULL) 3390 strlcpy(udev.dv_drivername, dev->driver->name, 3391 sizeof(udev.dv_drivername)); 3392 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 3393 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 3394 udev.dv_devflags = dev->devflags; 3395 udev.dv_flags = dev->flags; 3396 udev.dv_state = dev->state; 3397 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 3398 return (error); 3399 } 3400 3401 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 3402 "system device tree"); 3403 3404 int 3405 bus_data_generation_check(int generation) 3406 { 3407 if (generation != bus_data_generation) 3408 return (1); 3409 3410 /* XXX generate optimised lists here? */ 3411 return (0); 3412 } 3413 3414 void 3415 bus_data_generation_update(void) 3416 { 3417 bus_data_generation++; 3418 } 3419 3420 const char * 3421 intr_str_polarity(enum intr_polarity pola) 3422 { 3423 switch (pola) { 3424 case INTR_POLARITY_LOW: 3425 return "low"; 3426 3427 case INTR_POLARITY_HIGH: 3428 return "high"; 3429 3430 case INTR_POLARITY_CONFORM: 3431 return "conform"; 3432 } 3433 return "unknown"; 3434 } 3435 3436 const char * 3437 intr_str_trigger(enum intr_trigger trig) 3438 { 3439 switch (trig) { 3440 case INTR_TRIGGER_EDGE: 3441 return "edge"; 3442 3443 case INTR_TRIGGER_LEVEL: 3444 return "level"; 3445 3446 case INTR_TRIGGER_CONFORM: 3447 return "conform"; 3448 } 3449 return "unknown"; 3450 } 3451