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 static int 1904 resource_kenv(const char *name, int unit, const char *resname, long *result) 1905 { 1906 const char *env; 1907 char buf[64]; 1908 1909 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname); 1910 if ((env = kgetenv(buf)) != NULL) { 1911 *result = strtol(env, NULL, 0); 1912 return(0); 1913 } 1914 return (ENOENT); 1915 } 1916 1917 int 1918 resource_int_value(const char *name, int unit, const char *resname, int *result) 1919 { 1920 struct config_resource *res; 1921 long kvalue = 0; 1922 int error; 1923 1924 if (resource_kenv(name, unit, resname, &kvalue) == 0) { 1925 *result = (int)kvalue; 1926 return 0; 1927 } 1928 if ((error = resource_find(name, unit, resname, &res)) != 0) 1929 return(error); 1930 if (res->type != RES_INT) 1931 return(EFTYPE); 1932 *result = res->u.intval; 1933 return(0); 1934 } 1935 1936 int 1937 resource_long_value(const char *name, int unit, const char *resname, 1938 long *result) 1939 { 1940 struct config_resource *res; 1941 long kvalue; 1942 int error; 1943 1944 if (resource_kenv(name, unit, resname, &kvalue) == 0) { 1945 *result = (long)kvalue; 1946 return 0; 1947 } 1948 if ((error = resource_find(name, unit, resname, &res)) != 0) 1949 return(error); 1950 if (res->type != RES_LONG) 1951 return(EFTYPE); 1952 *result = res->u.longval; 1953 return(0); 1954 } 1955 1956 int 1957 resource_string_value(const char *name, int unit, const char *resname, 1958 char **result) 1959 { 1960 int error; 1961 struct config_resource *res; 1962 1963 if ((error = resource_find(name, unit, resname, &res)) != 0) 1964 return(error); 1965 if (res->type != RES_STRING) 1966 return(EFTYPE); 1967 *result = res->u.stringval; 1968 return(0); 1969 } 1970 1971 int 1972 resource_query_string(int i, const char *resname, const char *value) 1973 { 1974 if (i < 0) 1975 i = 0; 1976 else 1977 i = i + 1; 1978 for (; i < devtab_count; i++) 1979 if (resource_match_string(i, resname, value) >= 0) 1980 return(i); 1981 return(-1); 1982 } 1983 1984 int 1985 resource_locate(int i, const char *resname) 1986 { 1987 if (i < 0) 1988 i = 0; 1989 else 1990 i = i + 1; 1991 for (; i < devtab_count; i++) 1992 if (!strcmp(devtab[i].name, resname)) 1993 return(i); 1994 return(-1); 1995 } 1996 1997 int 1998 resource_count(void) 1999 { 2000 return(devtab_count); 2001 } 2002 2003 char * 2004 resource_query_name(int i) 2005 { 2006 return(devtab[i].name); 2007 } 2008 2009 int 2010 resource_query_unit(int i) 2011 { 2012 return(devtab[i].unit); 2013 } 2014 2015 static int 2016 resource_create(const char *name, int unit, const char *resname, 2017 resource_type type, struct config_resource **result) 2018 { 2019 int i, j; 2020 struct config_resource *res = NULL; 2021 2022 for (i = 0; i < devtab_count; i++) 2023 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 2024 res = devtab[i].resources; 2025 break; 2026 } 2027 if (res == NULL) { 2028 i = resource_new_name(name, unit); 2029 if (i < 0) 2030 return(ENOMEM); 2031 res = devtab[i].resources; 2032 } 2033 for (j = 0; j < devtab[i].resource_count; j++, res++) 2034 if (!strcmp(res->name, resname)) { 2035 *result = res; 2036 return(0); 2037 } 2038 j = resource_new_resname(i, resname, type); 2039 if (j < 0) 2040 return(ENOMEM); 2041 res = &devtab[i].resources[j]; 2042 *result = res; 2043 return(0); 2044 } 2045 2046 int 2047 resource_set_int(const char *name, int unit, const char *resname, int value) 2048 { 2049 int error; 2050 struct config_resource *res; 2051 2052 error = resource_create(name, unit, resname, RES_INT, &res); 2053 if (error) 2054 return(error); 2055 if (res->type != RES_INT) 2056 return(EFTYPE); 2057 res->u.intval = value; 2058 return(0); 2059 } 2060 2061 int 2062 resource_set_long(const char *name, int unit, const char *resname, long value) 2063 { 2064 int error; 2065 struct config_resource *res; 2066 2067 error = resource_create(name, unit, resname, RES_LONG, &res); 2068 if (error) 2069 return(error); 2070 if (res->type != RES_LONG) 2071 return(EFTYPE); 2072 res->u.longval = value; 2073 return(0); 2074 } 2075 2076 int 2077 resource_set_string(const char *name, int unit, const char *resname, 2078 const char *value) 2079 { 2080 int error; 2081 struct config_resource *res; 2082 2083 error = resource_create(name, unit, resname, RES_STRING, &res); 2084 if (error) 2085 return(error); 2086 if (res->type != RES_STRING) 2087 return(EFTYPE); 2088 if (res->u.stringval) 2089 kfree(res->u.stringval, M_TEMP); 2090 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 2091 if (res->u.stringval == NULL) 2092 return(ENOMEM); 2093 strcpy(res->u.stringval, value); 2094 return(0); 2095 } 2096 2097 static void 2098 resource_cfgload(void *dummy __unused) 2099 { 2100 struct config_resource *res, *cfgres; 2101 int i, j; 2102 int error; 2103 char *name, *resname; 2104 int unit; 2105 resource_type type; 2106 char *stringval; 2107 int config_devtab_count; 2108 2109 config_devtab_count = devtab_count; 2110 devtab = NULL; 2111 devtab_count = 0; 2112 2113 for (i = 0; i < config_devtab_count; i++) { 2114 name = config_devtab[i].name; 2115 unit = config_devtab[i].unit; 2116 2117 for (j = 0; j < config_devtab[i].resource_count; j++) { 2118 cfgres = config_devtab[i].resources; 2119 resname = cfgres[j].name; 2120 type = cfgres[j].type; 2121 error = resource_create(name, unit, resname, type, 2122 &res); 2123 if (error) { 2124 kprintf("create resource %s%d: error %d\n", 2125 name, unit, error); 2126 continue; 2127 } 2128 if (res->type != type) { 2129 kprintf("type mismatch %s%d: %d != %d\n", 2130 name, unit, res->type, type); 2131 continue; 2132 } 2133 switch (type) { 2134 case RES_INT: 2135 res->u.intval = cfgres[j].u.intval; 2136 break; 2137 case RES_LONG: 2138 res->u.longval = cfgres[j].u.longval; 2139 break; 2140 case RES_STRING: 2141 if (res->u.stringval) 2142 kfree(res->u.stringval, M_TEMP); 2143 stringval = cfgres[j].u.stringval; 2144 res->u.stringval = kmalloc(strlen(stringval) + 1, 2145 M_TEMP, M_INTWAIT); 2146 if (res->u.stringval == NULL) 2147 break; 2148 strcpy(res->u.stringval, stringval); 2149 break; 2150 default: 2151 panic("unknown resource type %d", type); 2152 } 2153 } 2154 } 2155 } 2156 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0) 2157 2158 2159 /*======================================*/ 2160 /* 2161 * Some useful method implementations to make life easier for bus drivers. 2162 */ 2163 2164 void 2165 resource_list_init(struct resource_list *rl) 2166 { 2167 SLIST_INIT(rl); 2168 } 2169 2170 void 2171 resource_list_free(struct resource_list *rl) 2172 { 2173 struct resource_list_entry *rle; 2174 2175 while ((rle = SLIST_FIRST(rl)) != NULL) { 2176 if (rle->res) 2177 panic("resource_list_free: resource entry is busy"); 2178 SLIST_REMOVE_HEAD(rl, link); 2179 kfree(rle, M_BUS); 2180 } 2181 } 2182 2183 void 2184 resource_list_add(struct resource_list *rl, int type, int rid, 2185 u_long start, u_long end, u_long count, int cpuid) 2186 { 2187 struct resource_list_entry *rle; 2188 2189 rle = resource_list_find(rl, type, rid); 2190 if (rle == NULL) { 2191 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS, 2192 M_INTWAIT); 2193 if (!rle) 2194 panic("resource_list_add: can't record entry"); 2195 SLIST_INSERT_HEAD(rl, rle, link); 2196 rle->type = type; 2197 rle->rid = rid; 2198 rle->res = NULL; 2199 rle->cpuid = -1; 2200 } 2201 2202 if (rle->res) 2203 panic("resource_list_add: resource entry is busy"); 2204 2205 rle->start = start; 2206 rle->end = end; 2207 rle->count = count; 2208 2209 if (cpuid != -1) { 2210 if (rle->cpuid != -1 && rle->cpuid != cpuid) { 2211 panic("resource_list_add: moving from cpu%d -> cpu%d\n", 2212 rle->cpuid, cpuid); 2213 } 2214 rle->cpuid = cpuid; 2215 } 2216 } 2217 2218 struct resource_list_entry* 2219 resource_list_find(struct resource_list *rl, 2220 int type, int rid) 2221 { 2222 struct resource_list_entry *rle; 2223 2224 SLIST_FOREACH(rle, rl, link) 2225 if (rle->type == type && rle->rid == rid) 2226 return(rle); 2227 return(NULL); 2228 } 2229 2230 void 2231 resource_list_delete(struct resource_list *rl, 2232 int type, int rid) 2233 { 2234 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 2235 2236 if (rle) { 2237 if (rle->res != NULL) 2238 panic("resource_list_delete: resource has not been released"); 2239 SLIST_REMOVE(rl, rle, resource_list_entry, link); 2240 kfree(rle, M_BUS); 2241 } 2242 } 2243 2244 struct resource * 2245 resource_list_alloc(struct resource_list *rl, 2246 device_t bus, device_t child, 2247 int type, int *rid, 2248 u_long start, u_long end, 2249 u_long count, u_int flags, int cpuid) 2250 { 2251 struct resource_list_entry *rle = NULL; 2252 int passthrough = (device_get_parent(child) != bus); 2253 int isdefault = (start == 0UL && end == ~0UL); 2254 2255 if (passthrough) { 2256 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2257 type, rid, 2258 start, end, count, flags, cpuid)); 2259 } 2260 2261 rle = resource_list_find(rl, type, *rid); 2262 2263 if (!rle) 2264 return(0); /* no resource of that type/rid */ 2265 2266 if (rle->res) 2267 panic("resource_list_alloc: resource entry is busy"); 2268 2269 if (isdefault) { 2270 start = rle->start; 2271 count = max(count, rle->count); 2272 end = max(rle->end, start + count - 1); 2273 } 2274 cpuid = rle->cpuid; 2275 2276 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2277 type, rid, start, end, count, 2278 flags, cpuid); 2279 2280 /* 2281 * Record the new range. 2282 */ 2283 if (rle->res) { 2284 rle->start = rman_get_start(rle->res); 2285 rle->end = rman_get_end(rle->res); 2286 rle->count = count; 2287 } 2288 2289 return(rle->res); 2290 } 2291 2292 int 2293 resource_list_release(struct resource_list *rl, 2294 device_t bus, device_t child, 2295 int type, int rid, struct resource *res) 2296 { 2297 struct resource_list_entry *rle = NULL; 2298 int passthrough = (device_get_parent(child) != bus); 2299 int error; 2300 2301 if (passthrough) { 2302 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2303 type, rid, res)); 2304 } 2305 2306 rle = resource_list_find(rl, type, rid); 2307 2308 if (!rle) 2309 panic("resource_list_release: can't find resource"); 2310 if (!rle->res) 2311 panic("resource_list_release: resource entry is not busy"); 2312 2313 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2314 type, rid, res); 2315 if (error) 2316 return(error); 2317 2318 rle->res = NULL; 2319 return(0); 2320 } 2321 2322 int 2323 resource_list_print_type(struct resource_list *rl, const char *name, int type, 2324 const char *format) 2325 { 2326 struct resource_list_entry *rle; 2327 int printed, retval; 2328 2329 printed = 0; 2330 retval = 0; 2331 /* Yes, this is kinda cheating */ 2332 SLIST_FOREACH(rle, rl, link) { 2333 if (rle->type == type) { 2334 if (printed == 0) 2335 retval += kprintf(" %s ", name); 2336 else 2337 retval += kprintf(","); 2338 printed++; 2339 retval += kprintf(format, rle->start); 2340 if (rle->count > 1) { 2341 retval += kprintf("-"); 2342 retval += kprintf(format, rle->start + 2343 rle->count - 1); 2344 } 2345 } 2346 } 2347 return(retval); 2348 } 2349 2350 /* 2351 * Generic driver/device identify functions. These will install a device 2352 * rendezvous point under the parent using the same name as the driver 2353 * name, which will at a later time be probed and attached. 2354 * 2355 * These functions are used when the parent does not 'scan' its bus for 2356 * matching devices, or for the particular devices using these functions, 2357 * or when the device is a pseudo or synthesized device (such as can be 2358 * found under firewire and ppbus). 2359 */ 2360 int 2361 bus_generic_identify(driver_t *driver, device_t parent) 2362 { 2363 if (parent->state == DS_ATTACHED) 2364 return (0); 2365 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); 2366 return (0); 2367 } 2368 2369 int 2370 bus_generic_identify_sameunit(driver_t *driver, device_t parent) 2371 { 2372 if (parent->state == DS_ATTACHED) 2373 return (0); 2374 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); 2375 return (0); 2376 } 2377 2378 /* 2379 * Call DEVICE_IDENTIFY for each driver. 2380 */ 2381 int 2382 bus_generic_probe(device_t dev) 2383 { 2384 devclass_t dc = dev->devclass; 2385 driverlink_t dl; 2386 2387 TAILQ_FOREACH(dl, &dc->drivers, link) { 2388 DEVICE_IDENTIFY(dl->driver, dev); 2389 } 2390 2391 return(0); 2392 } 2393 2394 /* 2395 * This is an aweful hack due to the isa bus and autoconf code not 2396 * probing the ISA devices until after everything else has configured. 2397 * The ISA bus did a dummy attach long ago so we have to set it back 2398 * to an earlier state so the probe thinks its the initial probe and 2399 * not a bus rescan. 2400 * 2401 * XXX remove by properly defering the ISA bus scan. 2402 */ 2403 int 2404 bus_generic_probe_hack(device_t dev) 2405 { 2406 if (dev->state == DS_ATTACHED) { 2407 dev->state = DS_ALIVE; 2408 bus_generic_probe(dev); 2409 dev->state = DS_ATTACHED; 2410 } 2411 return (0); 2412 } 2413 2414 int 2415 bus_generic_attach(device_t dev) 2416 { 2417 device_t child; 2418 2419 TAILQ_FOREACH(child, &dev->children, link) { 2420 device_probe_and_attach(child); 2421 } 2422 2423 return(0); 2424 } 2425 2426 int 2427 bus_generic_detach(device_t dev) 2428 { 2429 device_t child; 2430 int error; 2431 2432 if (dev->state != DS_ATTACHED) 2433 return(EBUSY); 2434 2435 TAILQ_FOREACH(child, &dev->children, link) 2436 if ((error = device_detach(child)) != 0) 2437 return(error); 2438 2439 return 0; 2440 } 2441 2442 int 2443 bus_generic_shutdown(device_t dev) 2444 { 2445 device_t child; 2446 2447 TAILQ_FOREACH(child, &dev->children, link) 2448 device_shutdown(child); 2449 2450 return(0); 2451 } 2452 2453 int 2454 bus_generic_suspend(device_t dev) 2455 { 2456 int error; 2457 device_t child, child2; 2458 2459 TAILQ_FOREACH(child, &dev->children, link) { 2460 error = DEVICE_SUSPEND(child); 2461 if (error) { 2462 for (child2 = TAILQ_FIRST(&dev->children); 2463 child2 && child2 != child; 2464 child2 = TAILQ_NEXT(child2, link)) 2465 DEVICE_RESUME(child2); 2466 return(error); 2467 } 2468 } 2469 return(0); 2470 } 2471 2472 int 2473 bus_generic_resume(device_t dev) 2474 { 2475 device_t child; 2476 2477 TAILQ_FOREACH(child, &dev->children, link) 2478 DEVICE_RESUME(child); 2479 /* if resume fails, there's nothing we can usefully do... */ 2480 2481 return(0); 2482 } 2483 2484 int 2485 bus_print_child_header(device_t dev, device_t child) 2486 { 2487 int retval = 0; 2488 2489 if (device_get_desc(child)) 2490 retval += device_printf(child, "<%s>", device_get_desc(child)); 2491 else 2492 retval += kprintf("%s", device_get_nameunit(child)); 2493 if (bootverbose) { 2494 if (child->state != DS_ATTACHED) 2495 kprintf(" [tentative]"); 2496 else 2497 kprintf(" [attached!]"); 2498 } 2499 return(retval); 2500 } 2501 2502 int 2503 bus_print_child_footer(device_t dev, device_t child) 2504 { 2505 return(kprintf(" on %s\n", device_get_nameunit(dev))); 2506 } 2507 2508 device_t 2509 bus_generic_add_child(device_t dev, device_t child, int order, 2510 const char *name, int unit) 2511 { 2512 if (dev->parent) 2513 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); 2514 else 2515 dev = device_add_child_ordered(child, order, name, unit); 2516 return(dev); 2517 2518 } 2519 2520 int 2521 bus_generic_print_child(device_t dev, device_t child) 2522 { 2523 int retval = 0; 2524 2525 retval += bus_print_child_header(dev, child); 2526 retval += bus_print_child_footer(dev, child); 2527 2528 return(retval); 2529 } 2530 2531 int 2532 bus_generic_read_ivar(device_t dev, device_t child, int index, 2533 uintptr_t * result) 2534 { 2535 int error; 2536 2537 if (dev->parent) 2538 error = BUS_READ_IVAR(dev->parent, child, index, result); 2539 else 2540 error = ENOENT; 2541 return (error); 2542 } 2543 2544 int 2545 bus_generic_write_ivar(device_t dev, device_t child, int index, 2546 uintptr_t value) 2547 { 2548 int error; 2549 2550 if (dev->parent) 2551 error = BUS_WRITE_IVAR(dev->parent, child, index, value); 2552 else 2553 error = ENOENT; 2554 return (error); 2555 } 2556 2557 /* 2558 * Resource list are used for iterations, do not recurse. 2559 */ 2560 struct resource_list * 2561 bus_generic_get_resource_list(device_t dev, device_t child) 2562 { 2563 return (NULL); 2564 } 2565 2566 void 2567 bus_generic_driver_added(device_t dev, driver_t *driver) 2568 { 2569 device_t child; 2570 2571 DEVICE_IDENTIFY(driver, dev); 2572 TAILQ_FOREACH(child, &dev->children, link) { 2573 if (child->state == DS_NOTPRESENT) 2574 device_probe_and_attach(child); 2575 } 2576 } 2577 2578 int 2579 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 2580 int flags, driver_intr_t *intr, void *arg, 2581 void **cookiep, lwkt_serialize_t serializer) 2582 { 2583 /* Propagate up the bus hierarchy until someone handles it. */ 2584 if (dev->parent) 2585 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 2586 intr, arg, cookiep, serializer)); 2587 else 2588 return(EINVAL); 2589 } 2590 2591 int 2592 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 2593 void *cookie) 2594 { 2595 /* Propagate up the bus hierarchy until someone handles it. */ 2596 if (dev->parent) 2597 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 2598 else 2599 return(EINVAL); 2600 } 2601 2602 int 2603 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 2604 { 2605 if (dev->parent) 2606 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 2607 else 2608 return(0); 2609 } 2610 2611 void 2612 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 2613 { 2614 if (dev->parent) 2615 BUS_ENABLE_INTR(dev->parent, child, cookie); 2616 } 2617 2618 int 2619 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig, 2620 enum intr_polarity pol) 2621 { 2622 /* Propagate up the bus hierarchy until someone handles it. */ 2623 if (dev->parent) 2624 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol)); 2625 else 2626 return(EINVAL); 2627 } 2628 2629 struct resource * 2630 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 2631 u_long start, u_long end, u_long count, u_int flags, int cpuid) 2632 { 2633 /* Propagate up the bus hierarchy until someone handles it. */ 2634 if (dev->parent) 2635 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 2636 start, end, count, flags, cpuid)); 2637 else 2638 return(NULL); 2639 } 2640 2641 int 2642 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2643 struct resource *r) 2644 { 2645 /* Propagate up the bus hierarchy until someone handles it. */ 2646 if (dev->parent) 2647 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 2648 else 2649 return(EINVAL); 2650 } 2651 2652 int 2653 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2654 struct resource *r) 2655 { 2656 /* Propagate up the bus hierarchy until someone handles it. */ 2657 if (dev->parent) 2658 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 2659 else 2660 return(EINVAL); 2661 } 2662 2663 int 2664 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2665 int rid, struct resource *r) 2666 { 2667 /* Propagate up the bus hierarchy until someone handles it. */ 2668 if (dev->parent) 2669 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2670 r)); 2671 else 2672 return(EINVAL); 2673 } 2674 2675 int 2676 bus_generic_get_resource(device_t dev, device_t child, int type, int rid, 2677 u_long *startp, u_long *countp) 2678 { 2679 int error; 2680 2681 error = ENOENT; 2682 if (dev->parent) { 2683 error = BUS_GET_RESOURCE(dev->parent, child, type, rid, 2684 startp, countp); 2685 } 2686 return (error); 2687 } 2688 2689 int 2690 bus_generic_set_resource(device_t dev, device_t child, int type, int rid, 2691 u_long start, u_long count, int cpuid) 2692 { 2693 int error; 2694 2695 error = EINVAL; 2696 if (dev->parent) { 2697 error = BUS_SET_RESOURCE(dev->parent, child, type, rid, 2698 start, count, cpuid); 2699 } 2700 return (error); 2701 } 2702 2703 void 2704 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) 2705 { 2706 if (dev->parent) 2707 BUS_DELETE_RESOURCE(dev, child, type, rid); 2708 } 2709 2710 int 2711 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2712 u_long *startp, u_long *countp) 2713 { 2714 struct resource_list *rl = NULL; 2715 struct resource_list_entry *rle = NULL; 2716 2717 rl = BUS_GET_RESOURCE_LIST(dev, child); 2718 if (!rl) 2719 return(EINVAL); 2720 2721 rle = resource_list_find(rl, type, rid); 2722 if (!rle) 2723 return(ENOENT); 2724 2725 if (startp) 2726 *startp = rle->start; 2727 if (countp) 2728 *countp = rle->count; 2729 2730 return(0); 2731 } 2732 2733 int 2734 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2735 u_long start, u_long count, int cpuid) 2736 { 2737 struct resource_list *rl = NULL; 2738 2739 rl = BUS_GET_RESOURCE_LIST(dev, child); 2740 if (!rl) 2741 return(EINVAL); 2742 2743 resource_list_add(rl, type, rid, start, (start + count - 1), count, 2744 cpuid); 2745 2746 return(0); 2747 } 2748 2749 void 2750 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2751 { 2752 struct resource_list *rl = NULL; 2753 2754 rl = BUS_GET_RESOURCE_LIST(dev, child); 2755 if (!rl) 2756 return; 2757 2758 resource_list_delete(rl, type, rid); 2759 } 2760 2761 int 2762 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2763 int rid, struct resource *r) 2764 { 2765 struct resource_list *rl = NULL; 2766 2767 rl = BUS_GET_RESOURCE_LIST(dev, child); 2768 if (!rl) 2769 return(EINVAL); 2770 2771 return(resource_list_release(rl, dev, child, type, rid, r)); 2772 } 2773 2774 struct resource * 2775 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2776 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid) 2777 { 2778 struct resource_list *rl = NULL; 2779 2780 rl = BUS_GET_RESOURCE_LIST(dev, child); 2781 if (!rl) 2782 return(NULL); 2783 2784 return(resource_list_alloc(rl, dev, child, type, rid, 2785 start, end, count, flags, cpuid)); 2786 } 2787 2788 int 2789 bus_generic_child_present(device_t bus, device_t child) 2790 { 2791 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2792 } 2793 2794 2795 /* 2796 * Some convenience functions to make it easier for drivers to use the 2797 * resource-management functions. All these really do is hide the 2798 * indirection through the parent's method table, making for slightly 2799 * less-wordy code. In the future, it might make sense for this code 2800 * to maintain some sort of a list of resources allocated by each device. 2801 */ 2802 int 2803 bus_alloc_resources(device_t dev, struct resource_spec *rs, 2804 struct resource **res) 2805 { 2806 int i; 2807 2808 for (i = 0; rs[i].type != -1; i++) 2809 res[i] = NULL; 2810 for (i = 0; rs[i].type != -1; i++) { 2811 res[i] = bus_alloc_resource_any(dev, 2812 rs[i].type, &rs[i].rid, rs[i].flags); 2813 if (res[i] == NULL) { 2814 bus_release_resources(dev, rs, res); 2815 return (ENXIO); 2816 } 2817 } 2818 return (0); 2819 } 2820 2821 void 2822 bus_release_resources(device_t dev, const struct resource_spec *rs, 2823 struct resource **res) 2824 { 2825 int i; 2826 2827 for (i = 0; rs[i].type != -1; i++) 2828 if (res[i] != NULL) { 2829 bus_release_resource( 2830 dev, rs[i].type, rs[i].rid, res[i]); 2831 res[i] = NULL; 2832 } 2833 } 2834 2835 struct resource * 2836 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2837 u_long count, u_int flags) 2838 { 2839 if (dev->parent == 0) 2840 return(0); 2841 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2842 count, flags, -1)); 2843 } 2844 2845 struct resource * 2846 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags) 2847 { 2848 if (dev->parent == 0) 2849 return(0); 2850 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid, 2851 irq, irq, 1, flags, machintr_intr_cpuid(irq)); 2852 } 2853 2854 int 2855 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2856 { 2857 if (dev->parent == 0) 2858 return(EINVAL); 2859 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2860 } 2861 2862 int 2863 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2864 { 2865 if (dev->parent == 0) 2866 return(EINVAL); 2867 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2868 } 2869 2870 int 2871 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2872 { 2873 if (dev->parent == 0) 2874 return(EINVAL); 2875 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2876 } 2877 2878 int 2879 bus_setup_intr(device_t dev, struct resource *r, int flags, 2880 driver_intr_t handler, void *arg, 2881 void **cookiep, lwkt_serialize_t serializer) 2882 { 2883 if (dev->parent == 0) 2884 return(EINVAL); 2885 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2886 cookiep, serializer)); 2887 } 2888 2889 int 2890 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2891 { 2892 if (dev->parent == 0) 2893 return(EINVAL); 2894 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2895 } 2896 2897 void 2898 bus_enable_intr(device_t dev, void *cookie) 2899 { 2900 if (dev->parent) 2901 BUS_ENABLE_INTR(dev->parent, dev, cookie); 2902 } 2903 2904 int 2905 bus_disable_intr(device_t dev, void *cookie) 2906 { 2907 if (dev->parent) 2908 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 2909 else 2910 return(0); 2911 } 2912 2913 int 2914 bus_set_resource(device_t dev, int type, int rid, 2915 u_long start, u_long count, int cpuid) 2916 { 2917 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2918 start, count, cpuid)); 2919 } 2920 2921 int 2922 bus_get_resource(device_t dev, int type, int rid, 2923 u_long *startp, u_long *countp) 2924 { 2925 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2926 startp, countp)); 2927 } 2928 2929 u_long 2930 bus_get_resource_start(device_t dev, int type, int rid) 2931 { 2932 u_long start, count; 2933 int error; 2934 2935 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2936 &start, &count); 2937 if (error) 2938 return(0); 2939 return(start); 2940 } 2941 2942 u_long 2943 bus_get_resource_count(device_t dev, int type, int rid) 2944 { 2945 u_long start, count; 2946 int error; 2947 2948 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2949 &start, &count); 2950 if (error) 2951 return(0); 2952 return(count); 2953 } 2954 2955 void 2956 bus_delete_resource(device_t dev, int type, int rid) 2957 { 2958 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2959 } 2960 2961 int 2962 bus_child_present(device_t child) 2963 { 2964 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2965 } 2966 2967 int 2968 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2969 { 2970 device_t parent; 2971 2972 parent = device_get_parent(child); 2973 if (parent == NULL) { 2974 *buf = '\0'; 2975 return (0); 2976 } 2977 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2978 } 2979 2980 int 2981 bus_child_location_str(device_t child, char *buf, size_t buflen) 2982 { 2983 device_t parent; 2984 2985 parent = device_get_parent(child); 2986 if (parent == NULL) { 2987 *buf = '\0'; 2988 return (0); 2989 } 2990 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2991 } 2992 2993 static int 2994 root_print_child(device_t dev, device_t child) 2995 { 2996 return(0); 2997 } 2998 2999 static int 3000 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 3001 void **cookiep, lwkt_serialize_t serializer) 3002 { 3003 /* 3004 * If an interrupt mapping gets to here something bad has happened. 3005 */ 3006 panic("root_setup_intr"); 3007 } 3008 3009 /* 3010 * If we get here, assume that the device is permanant and really is 3011 * present in the system. Removable bus drivers are expected to intercept 3012 * this call long before it gets here. We return -1 so that drivers that 3013 * really care can check vs -1 or some ERRNO returned higher in the food 3014 * chain. 3015 */ 3016 static int 3017 root_child_present(device_t dev, device_t child) 3018 { 3019 return(-1); 3020 } 3021 3022 /* 3023 * XXX NOTE! other defaults may be set in bus_if.m 3024 */ 3025 static kobj_method_t root_methods[] = { 3026 /* Device interface */ 3027 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 3028 KOBJMETHOD(device_suspend, bus_generic_suspend), 3029 KOBJMETHOD(device_resume, bus_generic_resume), 3030 3031 /* Bus interface */ 3032 KOBJMETHOD(bus_add_child, bus_generic_add_child), 3033 KOBJMETHOD(bus_print_child, root_print_child), 3034 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 3035 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 3036 KOBJMETHOD(bus_setup_intr, root_setup_intr), 3037 KOBJMETHOD(bus_child_present, root_child_present), 3038 3039 { 0, 0 } 3040 }; 3041 3042 static driver_t root_driver = { 3043 "root", 3044 root_methods, 3045 1, /* no softc */ 3046 }; 3047 3048 device_t root_bus; 3049 devclass_t root_devclass; 3050 3051 static int 3052 root_bus_module_handler(module_t mod, int what, void* arg) 3053 { 3054 switch (what) { 3055 case MOD_LOAD: 3056 TAILQ_INIT(&bus_data_devices); 3057 root_bus = make_device(NULL, "root", 0); 3058 root_bus->desc = "System root bus"; 3059 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 3060 root_bus->driver = &root_driver; 3061 root_bus->state = DS_ALIVE; 3062 root_devclass = devclass_find_internal("root", NULL, FALSE); 3063 devinit(); 3064 return(0); 3065 3066 case MOD_SHUTDOWN: 3067 device_shutdown(root_bus); 3068 return(0); 3069 default: 3070 return(0); 3071 } 3072 } 3073 3074 static moduledata_t root_bus_mod = { 3075 "rootbus", 3076 root_bus_module_handler, 3077 0 3078 }; 3079 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 3080 3081 void 3082 root_bus_configure(void) 3083 { 3084 int warncount; 3085 device_t dev; 3086 3087 PDEBUG((".")); 3088 3089 /* 3090 * handle device_identify based device attachments to the root_bus 3091 * (typically nexus). 3092 */ 3093 bus_generic_probe(root_bus); 3094 3095 /* 3096 * Probe and attach the devices under root_bus. 3097 */ 3098 TAILQ_FOREACH(dev, &root_bus->children, link) { 3099 device_probe_and_attach(dev); 3100 } 3101 3102 /* 3103 * Wait for all asynchronous attaches to complete. If we don't 3104 * our legacy ISA bus scan could steal device unit numbers or 3105 * even I/O ports. 3106 */ 3107 warncount = 10; 3108 if (numasyncthreads) 3109 kprintf("Waiting for async drivers to attach\n"); 3110 while (numasyncthreads > 0) { 3111 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK) 3112 --warncount; 3113 if (warncount == 0) { 3114 kprintf("Warning: Still waiting for %d " 3115 "drivers to attach\n", numasyncthreads); 3116 } else if (warncount == -30) { 3117 kprintf("Giving up on %d drivers\n", numasyncthreads); 3118 break; 3119 } 3120 } 3121 root_bus->state = DS_ATTACHED; 3122 } 3123 3124 int 3125 driver_module_handler(module_t mod, int what, void *arg) 3126 { 3127 int error; 3128 struct driver_module_data *dmd; 3129 devclass_t bus_devclass; 3130 kobj_class_t driver; 3131 const char *parentname; 3132 3133 dmd = (struct driver_module_data *)arg; 3134 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 3135 error = 0; 3136 3137 switch (what) { 3138 case MOD_LOAD: 3139 if (dmd->dmd_chainevh) 3140 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3141 3142 driver = dmd->dmd_driver; 3143 PDEBUG(("Loading module: driver %s on bus %s", 3144 DRIVERNAME(driver), dmd->dmd_busname)); 3145 3146 /* 3147 * If the driver has any base classes, make the 3148 * devclass inherit from the devclass of the driver's 3149 * first base class. This will allow the system to 3150 * search for drivers in both devclasses for children 3151 * of a device using this driver. 3152 */ 3153 if (driver->baseclasses) 3154 parentname = driver->baseclasses[0]->name; 3155 else 3156 parentname = NULL; 3157 *dmd->dmd_devclass = devclass_find_internal(driver->name, 3158 parentname, TRUE); 3159 3160 error = devclass_add_driver(bus_devclass, driver); 3161 if (error) 3162 break; 3163 break; 3164 3165 case MOD_UNLOAD: 3166 PDEBUG(("Unloading module: driver %s from bus %s", 3167 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 3168 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 3169 3170 if (!error && dmd->dmd_chainevh) 3171 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3172 break; 3173 } 3174 3175 return (error); 3176 } 3177 3178 #ifdef BUS_DEBUG 3179 3180 /* 3181 * The _short versions avoid iteration by not calling anything that prints 3182 * more than oneliners. I love oneliners. 3183 */ 3184 3185 static void 3186 print_device_short(device_t dev, int indent) 3187 { 3188 if (!dev) 3189 return; 3190 3191 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 3192 dev->unit, dev->desc, 3193 (dev->parent? "":"no "), 3194 (TAILQ_EMPTY(&dev->children)? "no ":""), 3195 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 3196 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 3197 (dev->flags&DF_WILDCARD? "wildcard,":""), 3198 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 3199 (dev->ivars? "":"no "), 3200 (dev->softc? "":"no "), 3201 dev->busy)); 3202 } 3203 3204 static void 3205 print_device(device_t dev, int indent) 3206 { 3207 if (!dev) 3208 return; 3209 3210 print_device_short(dev, indent); 3211 3212 indentprintf(("Parent:\n")); 3213 print_device_short(dev->parent, indent+1); 3214 indentprintf(("Driver:\n")); 3215 print_driver_short(dev->driver, indent+1); 3216 indentprintf(("Devclass:\n")); 3217 print_devclass_short(dev->devclass, indent+1); 3218 } 3219 3220 /* 3221 * Print the device and all its children (indented). 3222 */ 3223 void 3224 print_device_tree_short(device_t dev, int indent) 3225 { 3226 device_t child; 3227 3228 if (!dev) 3229 return; 3230 3231 print_device_short(dev, indent); 3232 3233 TAILQ_FOREACH(child, &dev->children, link) 3234 print_device_tree_short(child, indent+1); 3235 } 3236 3237 /* 3238 * Print the device and all its children (indented). 3239 */ 3240 void 3241 print_device_tree(device_t dev, int indent) 3242 { 3243 device_t child; 3244 3245 if (!dev) 3246 return; 3247 3248 print_device(dev, indent); 3249 3250 TAILQ_FOREACH(child, &dev->children, link) 3251 print_device_tree(child, indent+1); 3252 } 3253 3254 static void 3255 print_driver_short(driver_t *driver, int indent) 3256 { 3257 if (!driver) 3258 return; 3259 3260 indentprintf(("driver %s: softc size = %zu\n", 3261 driver->name, driver->size)); 3262 } 3263 3264 static void 3265 print_driver(driver_t *driver, int indent) 3266 { 3267 if (!driver) 3268 return; 3269 3270 print_driver_short(driver, indent); 3271 } 3272 3273 3274 static void 3275 print_driver_list(driver_list_t drivers, int indent) 3276 { 3277 driverlink_t driver; 3278 3279 TAILQ_FOREACH(driver, &drivers, link) 3280 print_driver(driver->driver, indent); 3281 } 3282 3283 static void 3284 print_devclass_short(devclass_t dc, int indent) 3285 { 3286 if (!dc) 3287 return; 3288 3289 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 3290 } 3291 3292 static void 3293 print_devclass(devclass_t dc, int indent) 3294 { 3295 int i; 3296 3297 if (!dc) 3298 return; 3299 3300 print_devclass_short(dc, indent); 3301 indentprintf(("Drivers:\n")); 3302 print_driver_list(dc->drivers, indent+1); 3303 3304 indentprintf(("Devices:\n")); 3305 for (i = 0; i < dc->maxunit; i++) 3306 if (dc->devices[i]) 3307 print_device(dc->devices[i], indent+1); 3308 } 3309 3310 void 3311 print_devclass_list_short(void) 3312 { 3313 devclass_t dc; 3314 3315 kprintf("Short listing of devclasses, drivers & devices:\n"); 3316 TAILQ_FOREACH(dc, &devclasses, link) { 3317 print_devclass_short(dc, 0); 3318 } 3319 } 3320 3321 void 3322 print_devclass_list(void) 3323 { 3324 devclass_t dc; 3325 3326 kprintf("Full listing of devclasses, drivers & devices:\n"); 3327 TAILQ_FOREACH(dc, &devclasses, link) { 3328 print_devclass(dc, 0); 3329 } 3330 } 3331 3332 #endif 3333 3334 /* 3335 * Check to see if a device is disabled via a disabled hint. 3336 */ 3337 int 3338 resource_disabled(const char *name, int unit) 3339 { 3340 int error, value; 3341 3342 error = resource_int_value(name, unit, "disabled", &value); 3343 if (error) 3344 return(0); 3345 return(value); 3346 } 3347 3348 /* 3349 * User-space access to the device tree. 3350 * 3351 * We implement a small set of nodes: 3352 * 3353 * hw.bus Single integer read method to obtain the 3354 * current generation count. 3355 * hw.bus.devices Reads the entire device tree in flat space. 3356 * hw.bus.rman Resource manager interface 3357 * 3358 * We might like to add the ability to scan devclasses and/or drivers to 3359 * determine what else is currently loaded/available. 3360 */ 3361 3362 static int 3363 sysctl_bus(SYSCTL_HANDLER_ARGS) 3364 { 3365 struct u_businfo ubus; 3366 3367 ubus.ub_version = BUS_USER_VERSION; 3368 ubus.ub_generation = bus_data_generation; 3369 3370 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 3371 } 3372 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 3373 "bus-related data"); 3374 3375 static int 3376 sysctl_devices(SYSCTL_HANDLER_ARGS) 3377 { 3378 int *name = (int *)arg1; 3379 u_int namelen = arg2; 3380 int index; 3381 struct device *dev; 3382 struct u_device udev; /* XXX this is a bit big */ 3383 int error; 3384 3385 if (namelen != 2) 3386 return (EINVAL); 3387 3388 if (bus_data_generation_check(name[0])) 3389 return (EINVAL); 3390 3391 index = name[1]; 3392 3393 /* 3394 * Scan the list of devices, looking for the requested index. 3395 */ 3396 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 3397 if (index-- == 0) 3398 break; 3399 } 3400 if (dev == NULL) 3401 return (ENOENT); 3402 3403 /* 3404 * Populate the return array. 3405 */ 3406 bzero(&udev, sizeof(udev)); 3407 udev.dv_handle = (uintptr_t)dev; 3408 udev.dv_parent = (uintptr_t)dev->parent; 3409 if (dev->nameunit != NULL) 3410 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 3411 if (dev->desc != NULL) 3412 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 3413 if (dev->driver != NULL && dev->driver->name != NULL) 3414 strlcpy(udev.dv_drivername, dev->driver->name, 3415 sizeof(udev.dv_drivername)); 3416 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 3417 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 3418 udev.dv_devflags = dev->devflags; 3419 udev.dv_flags = dev->flags; 3420 udev.dv_state = dev->state; 3421 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 3422 return (error); 3423 } 3424 3425 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 3426 "system device tree"); 3427 3428 int 3429 bus_data_generation_check(int generation) 3430 { 3431 if (generation != bus_data_generation) 3432 return (1); 3433 3434 /* XXX generate optimised lists here? */ 3435 return (0); 3436 } 3437 3438 void 3439 bus_data_generation_update(void) 3440 { 3441 bus_data_generation++; 3442 } 3443 3444 const char * 3445 intr_str_polarity(enum intr_polarity pola) 3446 { 3447 switch (pola) { 3448 case INTR_POLARITY_LOW: 3449 return "low"; 3450 3451 case INTR_POLARITY_HIGH: 3452 return "high"; 3453 3454 case INTR_POLARITY_CONFORM: 3455 return "conform"; 3456 } 3457 return "unknown"; 3458 } 3459 3460 const char * 3461 intr_str_trigger(enum intr_trigger trig) 3462 { 3463 switch (trig) { 3464 case INTR_TRIGGER_EDGE: 3465 return "edge"; 3466 3467 case INTR_TRIGGER_LEVEL: 3468 return "level"; 3469 3470 case INTR_TRIGGER_CONFORM: 3471 return "conform"; 3472 } 3473 return "unknown"; 3474 } 3475