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 * $DragonFly: src/sys/kern/subr_bus.c,v 1.46 2008/10/03 00:26:21 hasso Exp $ 28 */ 29 30 #include "opt_bus.h" 31 32 #include <sys/param.h> 33 #include <sys/queue.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/kobj.h> 38 #include <sys/bus_private.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/rman.h> 43 #include <sys/device.h> 44 #include <sys/lock.h> 45 #include <sys/conf.h> 46 #include <sys/selinfo.h> 47 #include <sys/uio.h> 48 #include <sys/filio.h> 49 #include <sys/poll.h> 50 #include <sys/signalvar.h> 51 52 #include <machine/stdarg.h> /* for device_printf() */ 53 54 #include <sys/thread2.h> 55 #include <sys/mplock2.h> 56 57 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 58 59 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 60 61 #ifdef BUS_DEBUG 62 #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n")) 63 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 64 #define DRIVERNAME(d) ((d)? d->name : "no driver") 65 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 66 67 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 68 * prevent syslog from deleting initial spaces 69 */ 70 #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0) 71 72 static void print_device_short(device_t dev, int indent); 73 static void print_device(device_t dev, int indent); 74 void print_device_tree_short(device_t dev, int indent); 75 void print_device_tree(device_t dev, int indent); 76 static void print_driver_short(driver_t *driver, int indent); 77 static void print_driver(driver_t *driver, int indent); 78 static void print_driver_list(driver_list_t drivers, int indent); 79 static void print_devclass_short(devclass_t dc, int indent); 80 static void print_devclass(devclass_t dc, int indent); 81 void print_devclass_list_short(void); 82 void print_devclass_list(void); 83 84 #else 85 /* Make the compiler ignore the function calls */ 86 #define PDEBUG(a) /* nop */ 87 #define DEVICENAME(d) /* nop */ 88 #define DRIVERNAME(d) /* nop */ 89 #define DEVCLANAME(d) /* nop */ 90 91 #define print_device_short(d,i) /* nop */ 92 #define print_device(d,i) /* nop */ 93 #define print_device_tree_short(d,i) /* nop */ 94 #define print_device_tree(d,i) /* nop */ 95 #define print_driver_short(d,i) /* nop */ 96 #define print_driver(d,i) /* nop */ 97 #define print_driver_list(d,i) /* nop */ 98 #define print_devclass_short(d,i) /* nop */ 99 #define print_devclass(d,i) /* nop */ 100 #define print_devclass_list_short() /* nop */ 101 #define print_devclass_list() /* nop */ 102 #endif 103 104 static void device_attach_async(device_t dev); 105 static void device_attach_thread(void *arg); 106 static int device_doattach(device_t dev); 107 108 static int do_async_attach = 0; 109 static int numasyncthreads; 110 TUNABLE_INT("kern.do_async_attach", &do_async_attach); 111 112 /* 113 * /dev/devctl implementation 114 */ 115 116 /* 117 * This design allows only one reader for /dev/devctl. This is not desirable 118 * in the long run, but will get a lot of hair out of this implementation. 119 * Maybe we should make this device a clonable device. 120 * 121 * Also note: we specifically do not attach a device to the device_t tree 122 * to avoid potential chicken and egg problems. One could argue that all 123 * of this belongs to the root node. One could also further argue that the 124 * sysctl interface that we have not might more properly be an ioctl 125 * interface, but at this stage of the game, I'm not inclined to rock that 126 * boat. 127 * 128 * I'm also not sure that the SIGIO support is done correctly or not, as 129 * I copied it from a driver that had SIGIO support that likely hasn't been 130 * tested since 3.4 or 2.2.8! 131 */ 132 133 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 134 static int devctl_disable = 0; 135 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 136 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0, 137 sysctl_devctl_disable, "I", "devctl disable"); 138 139 #define CDEV_MAJOR 188 140 141 static d_open_t devopen; 142 static d_close_t devclose; 143 static d_read_t devread; 144 static d_ioctl_t devioctl; 145 static d_poll_t devpoll; 146 147 static struct dev_ops devctl_ops = { 148 { "devctl", CDEV_MAJOR, 0 }, 149 .d_open = devopen, 150 .d_close = devclose, 151 .d_read = devread, 152 .d_ioctl = devioctl, 153 .d_poll = devpoll, 154 }; 155 156 struct dev_event_info 157 { 158 char *dei_data; 159 TAILQ_ENTRY(dev_event_info) dei_link; 160 }; 161 162 TAILQ_HEAD(devq, dev_event_info); 163 164 static struct dev_softc 165 { 166 int inuse; 167 int nonblock; 168 struct lock lock; 169 struct selinfo sel; 170 struct devq devq; 171 struct proc *async_proc; 172 } devsoftc; 173 174 static void 175 devinit(void) 176 { 177 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl"); 178 lockinit(&devsoftc.lock, "dev mtx", 0, 0); 179 TAILQ_INIT(&devsoftc.devq); 180 } 181 182 static int 183 devopen(struct dev_open_args *ap) 184 { 185 if (devsoftc.inuse) 186 return (EBUSY); 187 /* move to init */ 188 devsoftc.inuse = 1; 189 devsoftc.nonblock = 0; 190 devsoftc.async_proc = NULL; 191 return (0); 192 } 193 194 static int 195 devclose(struct dev_close_args *ap) 196 { 197 devsoftc.inuse = 0; 198 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 199 wakeup(&devsoftc); 200 lockmgr(&devsoftc.lock, LK_RELEASE); 201 202 return (0); 203 } 204 205 /* 206 * The read channel for this device is used to report changes to 207 * userland in realtime. We are required to free the data as well as 208 * the n1 object because we allocate them separately. Also note that 209 * we return one record at a time. If you try to read this device a 210 * character at a time, you will lose the rest of the data. Listening 211 * programs are expected to cope. 212 */ 213 static int 214 devread(struct dev_read_args *ap) 215 { 216 struct uio *uio = ap->a_uio; 217 struct dev_event_info *n1; 218 int rv; 219 220 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 221 while (TAILQ_EMPTY(&devsoftc.devq)) { 222 if (devsoftc.nonblock) { 223 lockmgr(&devsoftc.lock, LK_RELEASE); 224 return (EAGAIN); 225 } 226 tsleep_interlock(&devsoftc, PCATCH); 227 lockmgr(&devsoftc.lock, LK_RELEASE); 228 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0); 229 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 230 if (rv) { 231 /* 232 * Need to translate ERESTART to EINTR here? -- jake 233 */ 234 lockmgr(&devsoftc.lock, LK_RELEASE); 235 return (rv); 236 } 237 } 238 n1 = TAILQ_FIRST(&devsoftc.devq); 239 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 240 lockmgr(&devsoftc.lock, LK_RELEASE); 241 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 242 kfree(n1->dei_data, M_BUS); 243 kfree(n1, M_BUS); 244 return (rv); 245 } 246 247 static int 248 devioctl(struct dev_ioctl_args *ap) 249 { 250 switch (ap->a_cmd) { 251 252 case FIONBIO: 253 if (*(int*)ap->a_data) 254 devsoftc.nonblock = 1; 255 else 256 devsoftc.nonblock = 0; 257 return (0); 258 case FIOASYNC: 259 if (*(int*)ap->a_data) 260 devsoftc.async_proc = curproc; 261 else 262 devsoftc.async_proc = NULL; 263 return (0); 264 265 /* (un)Support for other fcntl() calls. */ 266 case FIOCLEX: 267 case FIONCLEX: 268 case FIONREAD: 269 case FIOSETOWN: 270 case FIOGETOWN: 271 default: 272 break; 273 } 274 return (ENOTTY); 275 } 276 277 static int 278 devpoll(struct dev_poll_args *ap) 279 { 280 int revents = 0; 281 282 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 283 if (ap->a_events & (POLLIN | POLLRDNORM)) { 284 if (!TAILQ_EMPTY(&devsoftc.devq)) 285 revents = ap->a_events & (POLLIN | POLLRDNORM); 286 else 287 selrecord(curthread, &devsoftc.sel); 288 } 289 lockmgr(&devsoftc.lock, LK_RELEASE); 290 291 ap->a_events = revents; 292 return (0); 293 } 294 295 /** 296 * @brief Return whether the userland process is running 297 */ 298 boolean_t 299 devctl_process_running(void) 300 { 301 return (devsoftc.inuse == 1); 302 } 303 304 /** 305 * @brief Queue data to be read from the devctl device 306 * 307 * Generic interface to queue data to the devctl device. It is 308 * assumed that @p data is properly formatted. It is further assumed 309 * that @p data is allocated using the M_BUS malloc type. 310 */ 311 void 312 devctl_queue_data(char *data) 313 { 314 struct dev_event_info *n1 = NULL; 315 struct proc *p; 316 317 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT); 318 if (n1 == NULL) 319 return; 320 n1->dei_data = data; 321 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 322 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 323 wakeup(&devsoftc); 324 lockmgr(&devsoftc.lock, LK_RELEASE); 325 get_mplock(); /* XXX */ 326 selwakeup(&devsoftc.sel); 327 rel_mplock(); /* XXX */ 328 p = devsoftc.async_proc; 329 if (p != NULL) 330 ksignal(p, SIGIO); 331 } 332 333 /** 334 * @brief Send a 'notification' to userland, using standard ways 335 */ 336 void 337 devctl_notify(const char *system, const char *subsystem, const char *type, 338 const char *data) 339 { 340 int len = 0; 341 char *msg; 342 343 if (system == NULL) 344 return; /* BOGUS! Must specify system. */ 345 if (subsystem == NULL) 346 return; /* BOGUS! Must specify subsystem. */ 347 if (type == NULL) 348 return; /* BOGUS! Must specify type. */ 349 len += strlen(" system=") + strlen(system); 350 len += strlen(" subsystem=") + strlen(subsystem); 351 len += strlen(" type=") + strlen(type); 352 /* add in the data message plus newline. */ 353 if (data != NULL) 354 len += strlen(data); 355 len += 3; /* '!', '\n', and NUL */ 356 msg = kmalloc(len, M_BUS, M_NOWAIT); 357 if (msg == NULL) 358 return; /* Drop it on the floor */ 359 if (data != NULL) 360 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n", 361 system, subsystem, type, data); 362 else 363 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n", 364 system, subsystem, type); 365 devctl_queue_data(msg); 366 } 367 368 /* 369 * Common routine that tries to make sending messages as easy as possible. 370 * We allocate memory for the data, copy strings into that, but do not 371 * free it unless there's an error. The dequeue part of the driver should 372 * free the data. We don't send data when the device is disabled. We do 373 * send data, even when we have no listeners, because we wish to avoid 374 * races relating to startup and restart of listening applications. 375 * 376 * devaddq is designed to string together the type of event, with the 377 * object of that event, plus the plug and play info and location info 378 * for that event. This is likely most useful for devices, but less 379 * useful for other consumers of this interface. Those should use 380 * the devctl_queue_data() interface instead. 381 */ 382 static void 383 devaddq(const char *type, const char *what, device_t dev) 384 { 385 char *data = NULL; 386 char *loc = NULL; 387 char *pnp = NULL; 388 const char *parstr; 389 390 if (devctl_disable) 391 return; 392 data = kmalloc(1024, M_BUS, M_NOWAIT); 393 if (data == NULL) 394 goto bad; 395 396 /* get the bus specific location of this device */ 397 loc = kmalloc(1024, M_BUS, M_NOWAIT); 398 if (loc == NULL) 399 goto bad; 400 *loc = '\0'; 401 bus_child_location_str(dev, loc, 1024); 402 403 /* Get the bus specific pnp info of this device */ 404 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 405 if (pnp == NULL) 406 goto bad; 407 *pnp = '\0'; 408 bus_child_pnpinfo_str(dev, pnp, 1024); 409 410 /* Get the parent of this device, or / if high enough in the tree. */ 411 if (device_get_parent(dev) == NULL) 412 parstr = "."; /* Or '/' ? */ 413 else 414 parstr = device_get_nameunit(device_get_parent(dev)); 415 /* String it all together. */ 416 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp, 417 parstr); 418 kfree(loc, M_BUS); 419 kfree(pnp, M_BUS); 420 devctl_queue_data(data); 421 return; 422 bad: 423 kfree(pnp, M_BUS); 424 kfree(loc, M_BUS); 425 kfree(data, M_BUS); 426 return; 427 } 428 429 /* 430 * A device was added to the tree. We are called just after it successfully 431 * attaches (that is, probe and attach success for this device). No call 432 * is made if a device is merely parented into the tree. See devnomatch 433 * if probe fails. If attach fails, no notification is sent (but maybe 434 * we should have a different message for this). 435 */ 436 static void 437 devadded(device_t dev) 438 { 439 char *pnp = NULL; 440 char *tmp = NULL; 441 442 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 443 if (pnp == NULL) 444 goto fail; 445 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 446 if (tmp == NULL) 447 goto fail; 448 *pnp = '\0'; 449 bus_child_pnpinfo_str(dev, pnp, 1024); 450 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 451 devaddq("+", tmp, dev); 452 fail: 453 if (pnp != NULL) 454 kfree(pnp, M_BUS); 455 if (tmp != NULL) 456 kfree(tmp, M_BUS); 457 return; 458 } 459 460 /* 461 * A device was removed from the tree. We are called just before this 462 * happens. 463 */ 464 static void 465 devremoved(device_t dev) 466 { 467 char *pnp = NULL; 468 char *tmp = NULL; 469 470 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 471 if (pnp == NULL) 472 goto fail; 473 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 474 if (tmp == NULL) 475 goto fail; 476 *pnp = '\0'; 477 bus_child_pnpinfo_str(dev, pnp, 1024); 478 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 479 devaddq("-", tmp, dev); 480 fail: 481 if (pnp != NULL) 482 kfree(pnp, M_BUS); 483 if (tmp != NULL) 484 kfree(tmp, M_BUS); 485 return; 486 } 487 488 /* 489 * Called when there's no match for this device. This is only called 490 * the first time that no match happens, so we don't keep getitng this 491 * message. Should that prove to be undesirable, we can change it. 492 * This is called when all drivers that can attach to a given bus 493 * decline to accept this device. Other errrors may not be detected. 494 */ 495 static void 496 devnomatch(device_t dev) 497 { 498 devaddq("?", "", dev); 499 } 500 501 static int 502 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 503 { 504 struct dev_event_info *n1; 505 int dis, error; 506 507 dis = devctl_disable; 508 error = sysctl_handle_int(oidp, &dis, 0, req); 509 if (error || !req->newptr) 510 return (error); 511 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 512 devctl_disable = dis; 513 if (dis) { 514 while (!TAILQ_EMPTY(&devsoftc.devq)) { 515 n1 = TAILQ_FIRST(&devsoftc.devq); 516 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 517 kfree(n1->dei_data, M_BUS); 518 kfree(n1, M_BUS); 519 } 520 } 521 lockmgr(&devsoftc.lock, LK_RELEASE); 522 return (0); 523 } 524 525 /* End of /dev/devctl code */ 526 527 TAILQ_HEAD(,device) bus_data_devices; 528 static int bus_data_generation = 1; 529 530 kobj_method_t null_methods[] = { 531 { 0, 0 } 532 }; 533 534 DEFINE_CLASS(null, null_methods, 0); 535 536 /* 537 * Devclass implementation 538 */ 539 540 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 541 542 static devclass_t 543 devclass_find_internal(const char *classname, const char *parentname, 544 int create) 545 { 546 devclass_t dc; 547 548 PDEBUG(("looking for %s", classname)); 549 if (classname == NULL) 550 return(NULL); 551 552 TAILQ_FOREACH(dc, &devclasses, link) 553 if (!strcmp(dc->name, classname)) 554 break; 555 556 if (create && !dc) { 557 PDEBUG(("creating %s", classname)); 558 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1, 559 M_BUS, M_INTWAIT | M_ZERO); 560 if (!dc) 561 return(NULL); 562 dc->parent = NULL; 563 dc->name = (char*) (dc + 1); 564 strcpy(dc->name, classname); 565 dc->devices = NULL; 566 dc->maxunit = 0; 567 TAILQ_INIT(&dc->drivers); 568 TAILQ_INSERT_TAIL(&devclasses, dc, link); 569 570 bus_data_generation_update(); 571 572 } 573 if (parentname && dc && !dc->parent) 574 dc->parent = devclass_find_internal(parentname, NULL, FALSE); 575 576 return(dc); 577 } 578 579 devclass_t 580 devclass_create(const char *classname) 581 { 582 return(devclass_find_internal(classname, NULL, TRUE)); 583 } 584 585 devclass_t 586 devclass_find(const char *classname) 587 { 588 return(devclass_find_internal(classname, NULL, FALSE)); 589 } 590 591 device_t 592 devclass_find_unit(const char *classname, int unit) 593 { 594 devclass_t dc; 595 596 if ((dc = devclass_find(classname)) != NULL) 597 return(devclass_get_device(dc, unit)); 598 return (NULL); 599 } 600 601 int 602 devclass_add_driver(devclass_t dc, driver_t *driver) 603 { 604 driverlink_t dl; 605 device_t dev; 606 int i; 607 608 PDEBUG(("%s", DRIVERNAME(driver))); 609 610 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 611 if (!dl) 612 return(ENOMEM); 613 614 /* 615 * Compile the driver's methods. Also increase the reference count 616 * so that the class doesn't get freed when the last instance 617 * goes. This means we can safely use static methods and avoids a 618 * double-free in devclass_delete_driver. 619 */ 620 kobj_class_instantiate(driver); 621 622 /* 623 * Make sure the devclass which the driver is implementing exists. 624 */ 625 devclass_find_internal(driver->name, NULL, TRUE); 626 627 dl->driver = driver; 628 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 629 630 /* 631 * Call BUS_DRIVER_ADDED for any existing busses in this class, 632 * but only if the bus has already been attached (otherwise we 633 * might probe too early). 634 * 635 * This is what will cause a newly loaded module to be associated 636 * with hardware. bus_generic_driver_added() is typically what ends 637 * up being called. 638 */ 639 for (i = 0; i < dc->maxunit; i++) { 640 if ((dev = dc->devices[i]) != NULL) { 641 if (dev->state >= DS_ATTACHED) 642 BUS_DRIVER_ADDED(dev, driver); 643 } 644 } 645 646 bus_data_generation_update(); 647 return(0); 648 } 649 650 int 651 devclass_delete_driver(devclass_t busclass, driver_t *driver) 652 { 653 devclass_t dc = devclass_find(driver->name); 654 driverlink_t dl; 655 device_t dev; 656 int i; 657 int error; 658 659 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 660 661 if (!dc) 662 return(0); 663 664 /* 665 * Find the link structure in the bus' list of drivers. 666 */ 667 TAILQ_FOREACH(dl, &busclass->drivers, link) 668 if (dl->driver == driver) 669 break; 670 671 if (!dl) { 672 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 673 return(ENOENT); 674 } 675 676 /* 677 * Disassociate from any devices. We iterate through all the 678 * devices in the devclass of the driver and detach any which are 679 * using the driver and which have a parent in the devclass which 680 * we are deleting from. 681 * 682 * Note that since a driver can be in multiple devclasses, we 683 * should not detach devices which are not children of devices in 684 * the affected devclass. 685 */ 686 for (i = 0; i < dc->maxunit; i++) 687 if (dc->devices[i]) { 688 dev = dc->devices[i]; 689 if (dev->driver == driver && dev->parent && 690 dev->parent->devclass == busclass) { 691 if ((error = device_detach(dev)) != 0) 692 return(error); 693 device_set_driver(dev, NULL); 694 } 695 } 696 697 TAILQ_REMOVE(&busclass->drivers, dl, link); 698 kfree(dl, M_BUS); 699 700 kobj_class_uninstantiate(driver); 701 702 bus_data_generation_update(); 703 return(0); 704 } 705 706 static driverlink_t 707 devclass_find_driver_internal(devclass_t dc, const char *classname) 708 { 709 driverlink_t dl; 710 711 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 712 713 TAILQ_FOREACH(dl, &dc->drivers, link) 714 if (!strcmp(dl->driver->name, classname)) 715 return(dl); 716 717 PDEBUG(("not found")); 718 return(NULL); 719 } 720 721 kobj_class_t 722 devclass_find_driver(devclass_t dc, const char *classname) 723 { 724 driverlink_t dl; 725 726 dl = devclass_find_driver_internal(dc, classname); 727 if (dl) 728 return(dl->driver); 729 else 730 return(NULL); 731 } 732 733 const char * 734 devclass_get_name(devclass_t dc) 735 { 736 return(dc->name); 737 } 738 739 device_t 740 devclass_get_device(devclass_t dc, int unit) 741 { 742 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 743 return(NULL); 744 return(dc->devices[unit]); 745 } 746 747 void * 748 devclass_get_softc(devclass_t dc, int unit) 749 { 750 device_t dev; 751 752 dev = devclass_get_device(dc, unit); 753 if (!dev) 754 return(NULL); 755 756 return(device_get_softc(dev)); 757 } 758 759 int 760 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 761 { 762 int i; 763 int count; 764 device_t *list; 765 766 count = 0; 767 for (i = 0; i < dc->maxunit; i++) 768 if (dc->devices[i]) 769 count++; 770 771 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 772 if (list == NULL) 773 return(ENOMEM); 774 775 count = 0; 776 for (i = 0; i < dc->maxunit; i++) 777 if (dc->devices[i]) { 778 list[count] = dc->devices[i]; 779 count++; 780 } 781 782 *devlistp = list; 783 *devcountp = count; 784 785 return(0); 786 } 787 788 /** 789 * @brief Get a list of drivers in the devclass 790 * 791 * An array containing a list of pointers to all the drivers in the 792 * given devclass is allocated and returned in @p *listp. The number 793 * of drivers in the array is returned in @p *countp. The caller should 794 * free the array using @c free(p, M_TEMP). 795 * 796 * @param dc the devclass to examine 797 * @param listp gives location for array pointer return value 798 * @param countp gives location for number of array elements 799 * return value 800 * 801 * @retval 0 success 802 * @retval ENOMEM the array allocation failed 803 */ 804 int 805 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp) 806 { 807 driverlink_t dl; 808 driver_t **list; 809 int count; 810 811 count = 0; 812 TAILQ_FOREACH(dl, &dc->drivers, link) 813 count++; 814 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT); 815 if (list == NULL) 816 return (ENOMEM); 817 818 count = 0; 819 TAILQ_FOREACH(dl, &dc->drivers, link) { 820 list[count] = dl->driver; 821 count++; 822 } 823 *listp = list; 824 *countp = count; 825 826 return (0); 827 } 828 829 /** 830 * @brief Get the number of devices in a devclass 831 * 832 * @param dc the devclass to examine 833 */ 834 int 835 devclass_get_count(devclass_t dc) 836 { 837 int count, i; 838 839 count = 0; 840 for (i = 0; i < dc->maxunit; i++) 841 if (dc->devices[i]) 842 count++; 843 return (count); 844 } 845 846 int 847 devclass_get_maxunit(devclass_t dc) 848 { 849 return(dc->maxunit); 850 } 851 852 void 853 devclass_set_parent(devclass_t dc, devclass_t pdc) 854 { 855 dc->parent = pdc; 856 } 857 858 devclass_t 859 devclass_get_parent(devclass_t dc) 860 { 861 return(dc->parent); 862 } 863 864 static int 865 devclass_alloc_unit(devclass_t dc, int *unitp) 866 { 867 int unit = *unitp; 868 869 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 870 871 /* If we have been given a wired unit number, check for existing device */ 872 if (unit != -1) { 873 if (unit >= 0 && unit < dc->maxunit && 874 dc->devices[unit] != NULL) { 875 if (bootverbose) 876 kprintf("%s-: %s%d exists, using next available unit number\n", 877 dc->name, dc->name, unit); 878 /* find the next available slot */ 879 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 880 ; 881 } 882 } else { 883 /* Unwired device, find the next available slot for it */ 884 unit = 0; 885 while (unit < dc->maxunit && dc->devices[unit] != NULL) 886 unit++; 887 } 888 889 /* 890 * We've selected a unit beyond the length of the table, so let's 891 * extend the table to make room for all units up to and including 892 * this one. 893 */ 894 if (unit >= dc->maxunit) { 895 device_t *newlist; 896 int newsize; 897 898 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 899 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS, 900 M_INTWAIT | M_ZERO); 901 if (newlist == NULL) 902 return(ENOMEM); 903 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 904 if (dc->devices) 905 kfree(dc->devices, M_BUS); 906 dc->devices = newlist; 907 dc->maxunit = newsize; 908 } 909 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 910 911 *unitp = unit; 912 return(0); 913 } 914 915 static int 916 devclass_add_device(devclass_t dc, device_t dev) 917 { 918 int buflen, error; 919 920 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 921 922 buflen = strlen(dc->name) + 5; 923 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 924 if (!dev->nameunit) 925 return(ENOMEM); 926 927 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 928 kfree(dev->nameunit, M_BUS); 929 dev->nameunit = NULL; 930 return(error); 931 } 932 dc->devices[dev->unit] = dev; 933 dev->devclass = dc; 934 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 935 936 return(0); 937 } 938 939 static int 940 devclass_delete_device(devclass_t dc, device_t dev) 941 { 942 if (!dc || !dev) 943 return(0); 944 945 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 946 947 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 948 panic("devclass_delete_device: inconsistent device class"); 949 dc->devices[dev->unit] = NULL; 950 if (dev->flags & DF_WILDCARD) 951 dev->unit = -1; 952 dev->devclass = NULL; 953 kfree(dev->nameunit, M_BUS); 954 dev->nameunit = NULL; 955 956 return(0); 957 } 958 959 static device_t 960 make_device(device_t parent, const char *name, int unit) 961 { 962 device_t dev; 963 devclass_t dc; 964 965 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 966 967 if (name != NULL) { 968 dc = devclass_find_internal(name, NULL, TRUE); 969 if (!dc) { 970 kprintf("make_device: can't find device class %s\n", name); 971 return(NULL); 972 } 973 } else 974 dc = NULL; 975 976 dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); 977 if (!dev) 978 return(0); 979 980 dev->parent = parent; 981 TAILQ_INIT(&dev->children); 982 kobj_init((kobj_t) dev, &null_class); 983 dev->driver = NULL; 984 dev->devclass = NULL; 985 dev->unit = unit; 986 dev->nameunit = NULL; 987 dev->desc = NULL; 988 dev->busy = 0; 989 dev->devflags = 0; 990 dev->flags = DF_ENABLED; 991 dev->order = 0; 992 if (unit == -1) 993 dev->flags |= DF_WILDCARD; 994 if (name) { 995 dev->flags |= DF_FIXEDCLASS; 996 if (devclass_add_device(dc, dev) != 0) { 997 kobj_delete((kobj_t)dev, M_BUS); 998 return(NULL); 999 } 1000 } 1001 dev->ivars = NULL; 1002 dev->softc = NULL; 1003 1004 dev->state = DS_NOTPRESENT; 1005 1006 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 1007 bus_data_generation_update(); 1008 1009 return(dev); 1010 } 1011 1012 static int 1013 device_print_child(device_t dev, device_t child) 1014 { 1015 int retval = 0; 1016 1017 if (device_is_alive(child)) 1018 retval += BUS_PRINT_CHILD(dev, child); 1019 else 1020 retval += device_printf(child, " not found\n"); 1021 1022 return(retval); 1023 } 1024 1025 device_t 1026 device_add_child(device_t dev, const char *name, int unit) 1027 { 1028 return device_add_child_ordered(dev, 0, name, unit); 1029 } 1030 1031 device_t 1032 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 1033 { 1034 device_t child; 1035 device_t place; 1036 1037 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 1038 order, unit)); 1039 1040 child = make_device(dev, name, unit); 1041 if (child == NULL) 1042 return child; 1043 child->order = order; 1044 1045 TAILQ_FOREACH(place, &dev->children, link) 1046 if (place->order > order) 1047 break; 1048 1049 if (place) { 1050 /* 1051 * The device 'place' is the first device whose order is 1052 * greater than the new child. 1053 */ 1054 TAILQ_INSERT_BEFORE(place, child, link); 1055 } else { 1056 /* 1057 * The new child's order is greater or equal to the order of 1058 * any existing device. Add the child to the tail of the list. 1059 */ 1060 TAILQ_INSERT_TAIL(&dev->children, child, link); 1061 } 1062 1063 bus_data_generation_update(); 1064 return(child); 1065 } 1066 1067 int 1068 device_delete_child(device_t dev, device_t child) 1069 { 1070 int error; 1071 device_t grandchild; 1072 1073 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 1074 1075 /* remove children first */ 1076 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 1077 error = device_delete_child(child, grandchild); 1078 if (error) 1079 return(error); 1080 } 1081 1082 if ((error = device_detach(child)) != 0) 1083 return(error); 1084 if (child->devclass) 1085 devclass_delete_device(child->devclass, child); 1086 TAILQ_REMOVE(&dev->children, child, link); 1087 TAILQ_REMOVE(&bus_data_devices, child, devlink); 1088 device_set_desc(child, NULL); 1089 kobj_delete((kobj_t)child, M_BUS); 1090 1091 bus_data_generation_update(); 1092 return(0); 1093 } 1094 1095 /** 1096 * @brief Find a device given a unit number 1097 * 1098 * This is similar to devclass_get_devices() but only searches for 1099 * devices which have @p dev as a parent. 1100 * 1101 * @param dev the parent device to search 1102 * @param unit the unit number to search for. If the unit is -1, 1103 * return the first child of @p dev which has name 1104 * @p classname (that is, the one with the lowest unit.) 1105 * 1106 * @returns the device with the given unit number or @c 1107 * NULL if there is no such device 1108 */ 1109 device_t 1110 device_find_child(device_t dev, const char *classname, int unit) 1111 { 1112 devclass_t dc; 1113 device_t child; 1114 1115 dc = devclass_find(classname); 1116 if (!dc) 1117 return(NULL); 1118 1119 if (unit != -1) { 1120 child = devclass_get_device(dc, unit); 1121 if (child && child->parent == dev) 1122 return (child); 1123 } else { 1124 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) { 1125 child = devclass_get_device(dc, unit); 1126 if (child && child->parent == dev) 1127 return (child); 1128 } 1129 } 1130 return(NULL); 1131 } 1132 1133 static driverlink_t 1134 first_matching_driver(devclass_t dc, device_t dev) 1135 { 1136 if (dev->devclass) 1137 return(devclass_find_driver_internal(dc, dev->devclass->name)); 1138 else 1139 return(TAILQ_FIRST(&dc->drivers)); 1140 } 1141 1142 static driverlink_t 1143 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1144 { 1145 if (dev->devclass) { 1146 driverlink_t dl; 1147 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1148 if (!strcmp(dev->devclass->name, dl->driver->name)) 1149 return(dl); 1150 return(NULL); 1151 } else 1152 return(TAILQ_NEXT(last, link)); 1153 } 1154 1155 static int 1156 device_probe_child(device_t dev, device_t child) 1157 { 1158 devclass_t dc; 1159 driverlink_t best = 0; 1160 driverlink_t dl; 1161 int result, pri = 0; 1162 int hasclass = (child->devclass != 0); 1163 1164 dc = dev->devclass; 1165 if (!dc) 1166 panic("device_probe_child: parent device has no devclass"); 1167 1168 if (child->state == DS_ALIVE) 1169 return(0); 1170 1171 for (; dc; dc = dc->parent) { 1172 for (dl = first_matching_driver(dc, child); dl; 1173 dl = next_matching_driver(dc, child, dl)) { 1174 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1175 device_set_driver(child, dl->driver); 1176 if (!hasclass) 1177 device_set_devclass(child, dl->driver->name); 1178 result = DEVICE_PROBE(child); 1179 if (!hasclass) 1180 device_set_devclass(child, 0); 1181 1182 /* 1183 * If the driver returns SUCCESS, there can be 1184 * no higher match for this device. 1185 */ 1186 if (result == 0) { 1187 best = dl; 1188 pri = 0; 1189 break; 1190 } 1191 1192 /* 1193 * The driver returned an error so it 1194 * certainly doesn't match. 1195 */ 1196 if (result > 0) { 1197 device_set_driver(child, 0); 1198 continue; 1199 } 1200 1201 /* 1202 * A priority lower than SUCCESS, remember the 1203 * best matching driver. Initialise the value 1204 * of pri for the first match. 1205 */ 1206 if (best == 0 || result > pri) { 1207 best = dl; 1208 pri = result; 1209 continue; 1210 } 1211 } 1212 /* 1213 * If we have unambiguous match in this devclass, 1214 * don't look in the parent. 1215 */ 1216 if (best && pri == 0) 1217 break; 1218 } 1219 1220 /* 1221 * If we found a driver, change state and initialise the devclass. 1222 */ 1223 if (best) { 1224 if (!child->devclass) 1225 device_set_devclass(child, best->driver->name); 1226 device_set_driver(child, best->driver); 1227 if (pri < 0) { 1228 /* 1229 * A bit bogus. Call the probe method again to make 1230 * sure that we have the right description. 1231 */ 1232 DEVICE_PROBE(child); 1233 } 1234 1235 bus_data_generation_update(); 1236 child->state = DS_ALIVE; 1237 return(0); 1238 } 1239 1240 return(ENXIO); 1241 } 1242 1243 device_t 1244 device_get_parent(device_t dev) 1245 { 1246 return dev->parent; 1247 } 1248 1249 int 1250 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1251 { 1252 int count; 1253 device_t child; 1254 device_t *list; 1255 1256 count = 0; 1257 TAILQ_FOREACH(child, &dev->children, link) 1258 count++; 1259 1260 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 1261 if (!list) 1262 return(ENOMEM); 1263 1264 count = 0; 1265 TAILQ_FOREACH(child, &dev->children, link) { 1266 list[count] = child; 1267 count++; 1268 } 1269 1270 *devlistp = list; 1271 *devcountp = count; 1272 1273 return(0); 1274 } 1275 1276 driver_t * 1277 device_get_driver(device_t dev) 1278 { 1279 return(dev->driver); 1280 } 1281 1282 devclass_t 1283 device_get_devclass(device_t dev) 1284 { 1285 return(dev->devclass); 1286 } 1287 1288 const char * 1289 device_get_name(device_t dev) 1290 { 1291 if (dev->devclass) 1292 return devclass_get_name(dev->devclass); 1293 return(NULL); 1294 } 1295 1296 const char * 1297 device_get_nameunit(device_t dev) 1298 { 1299 return(dev->nameunit); 1300 } 1301 1302 int 1303 device_get_unit(device_t dev) 1304 { 1305 return(dev->unit); 1306 } 1307 1308 const char * 1309 device_get_desc(device_t dev) 1310 { 1311 return(dev->desc); 1312 } 1313 1314 uint32_t 1315 device_get_flags(device_t dev) 1316 { 1317 return(dev->devflags); 1318 } 1319 1320 int 1321 device_print_prettyname(device_t dev) 1322 { 1323 const char *name = device_get_name(dev); 1324 1325 if (name == 0) 1326 return kprintf("unknown: "); 1327 else 1328 return kprintf("%s%d: ", name, device_get_unit(dev)); 1329 } 1330 1331 int 1332 device_printf(device_t dev, const char * fmt, ...) 1333 { 1334 __va_list ap; 1335 int retval; 1336 1337 retval = device_print_prettyname(dev); 1338 __va_start(ap, fmt); 1339 retval += kvprintf(fmt, ap); 1340 __va_end(ap); 1341 return retval; 1342 } 1343 1344 static void 1345 device_set_desc_internal(device_t dev, const char* desc, int copy) 1346 { 1347 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1348 kfree(dev->desc, M_BUS); 1349 dev->flags &= ~DF_DESCMALLOCED; 1350 dev->desc = NULL; 1351 } 1352 1353 if (copy && desc) { 1354 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 1355 if (dev->desc) { 1356 strcpy(dev->desc, desc); 1357 dev->flags |= DF_DESCMALLOCED; 1358 } 1359 } else { 1360 /* Avoid a -Wcast-qual warning */ 1361 dev->desc = (char *)(uintptr_t) desc; 1362 } 1363 1364 bus_data_generation_update(); 1365 } 1366 1367 void 1368 device_set_desc(device_t dev, const char* desc) 1369 { 1370 device_set_desc_internal(dev, desc, FALSE); 1371 } 1372 1373 void 1374 device_set_desc_copy(device_t dev, const char* desc) 1375 { 1376 device_set_desc_internal(dev, desc, TRUE); 1377 } 1378 1379 void 1380 device_set_flags(device_t dev, uint32_t flags) 1381 { 1382 dev->devflags = flags; 1383 } 1384 1385 void * 1386 device_get_softc(device_t dev) 1387 { 1388 return dev->softc; 1389 } 1390 1391 void 1392 device_set_softc(device_t dev, void *softc) 1393 { 1394 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1395 kfree(dev->softc, M_BUS); 1396 dev->softc = softc; 1397 if (dev->softc) 1398 dev->flags |= DF_EXTERNALSOFTC; 1399 else 1400 dev->flags &= ~DF_EXTERNALSOFTC; 1401 } 1402 1403 void 1404 device_set_async_attach(device_t dev, int enable) 1405 { 1406 if (enable) 1407 dev->flags |= DF_ASYNCPROBE; 1408 else 1409 dev->flags &= ~DF_ASYNCPROBE; 1410 } 1411 1412 void * 1413 device_get_ivars(device_t dev) 1414 { 1415 return dev->ivars; 1416 } 1417 1418 void 1419 device_set_ivars(device_t dev, void * ivars) 1420 { 1421 if (!dev) 1422 return; 1423 1424 dev->ivars = ivars; 1425 } 1426 1427 device_state_t 1428 device_get_state(device_t dev) 1429 { 1430 return(dev->state); 1431 } 1432 1433 void 1434 device_enable(device_t dev) 1435 { 1436 dev->flags |= DF_ENABLED; 1437 } 1438 1439 void 1440 device_disable(device_t dev) 1441 { 1442 dev->flags &= ~DF_ENABLED; 1443 } 1444 1445 /* 1446 * YYY cannot block 1447 */ 1448 void 1449 device_busy(device_t dev) 1450 { 1451 if (dev->state < DS_ATTACHED) 1452 panic("device_busy: called for unattached device"); 1453 if (dev->busy == 0 && dev->parent) 1454 device_busy(dev->parent); 1455 dev->busy++; 1456 dev->state = DS_BUSY; 1457 } 1458 1459 /* 1460 * YYY cannot block 1461 */ 1462 void 1463 device_unbusy(device_t dev) 1464 { 1465 if (dev->state != DS_BUSY) 1466 panic("device_unbusy: called for non-busy device"); 1467 dev->busy--; 1468 if (dev->busy == 0) { 1469 if (dev->parent) 1470 device_unbusy(dev->parent); 1471 dev->state = DS_ATTACHED; 1472 } 1473 } 1474 1475 void 1476 device_quiet(device_t dev) 1477 { 1478 dev->flags |= DF_QUIET; 1479 } 1480 1481 void 1482 device_verbose(device_t dev) 1483 { 1484 dev->flags &= ~DF_QUIET; 1485 } 1486 1487 int 1488 device_is_quiet(device_t dev) 1489 { 1490 return((dev->flags & DF_QUIET) != 0); 1491 } 1492 1493 int 1494 device_is_enabled(device_t dev) 1495 { 1496 return((dev->flags & DF_ENABLED) != 0); 1497 } 1498 1499 int 1500 device_is_alive(device_t dev) 1501 { 1502 return(dev->state >= DS_ALIVE); 1503 } 1504 1505 int 1506 device_is_attached(device_t dev) 1507 { 1508 return(dev->state >= DS_ATTACHED); 1509 } 1510 1511 int 1512 device_set_devclass(device_t dev, const char *classname) 1513 { 1514 devclass_t dc; 1515 int error; 1516 1517 if (!classname) { 1518 if (dev->devclass) 1519 devclass_delete_device(dev->devclass, dev); 1520 return(0); 1521 } 1522 1523 if (dev->devclass) { 1524 kprintf("device_set_devclass: device class already set\n"); 1525 return(EINVAL); 1526 } 1527 1528 dc = devclass_find_internal(classname, NULL, TRUE); 1529 if (!dc) 1530 return(ENOMEM); 1531 1532 error = devclass_add_device(dc, dev); 1533 1534 bus_data_generation_update(); 1535 return(error); 1536 } 1537 1538 int 1539 device_set_driver(device_t dev, driver_t *driver) 1540 { 1541 if (dev->state >= DS_ATTACHED) 1542 return(EBUSY); 1543 1544 if (dev->driver == driver) 1545 return(0); 1546 1547 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1548 kfree(dev->softc, M_BUS); 1549 dev->softc = NULL; 1550 } 1551 kobj_delete((kobj_t) dev, 0); 1552 dev->driver = driver; 1553 if (driver) { 1554 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1555 if (!(dev->flags & DF_EXTERNALSOFTC)) { 1556 dev->softc = kmalloc(driver->size, M_BUS, 1557 M_INTWAIT | M_ZERO); 1558 if (!dev->softc) { 1559 kobj_delete((kobj_t)dev, 0); 1560 kobj_init((kobj_t) dev, &null_class); 1561 dev->driver = NULL; 1562 return(ENOMEM); 1563 } 1564 } 1565 } else { 1566 kobj_init((kobj_t) dev, &null_class); 1567 } 1568 1569 bus_data_generation_update(); 1570 return(0); 1571 } 1572 1573 int 1574 device_probe_and_attach(device_t dev) 1575 { 1576 device_t bus = dev->parent; 1577 int error = 0; 1578 1579 if (dev->state >= DS_ALIVE) 1580 return(0); 1581 1582 if ((dev->flags & DF_ENABLED) == 0) { 1583 if (bootverbose) { 1584 device_print_prettyname(dev); 1585 kprintf("not probed (disabled)\n"); 1586 } 1587 return(0); 1588 } 1589 1590 error = device_probe_child(bus, dev); 1591 if (error) { 1592 if (!(dev->flags & DF_DONENOMATCH)) { 1593 BUS_PROBE_NOMATCH(bus, dev); 1594 devnomatch(dev); 1595 dev->flags |= DF_DONENOMATCH; 1596 } 1597 return(error); 1598 } 1599 1600 /* 1601 * Output the exact device chain prior to the attach in case the 1602 * system locks up during attach, and generate the full info after 1603 * the attach so correct irq and other information is displayed. 1604 */ 1605 if (bootverbose && !device_is_quiet(dev)) { 1606 device_t tmp; 1607 1608 kprintf("%s", device_get_nameunit(dev)); 1609 for (tmp = dev->parent; tmp; tmp = tmp->parent) 1610 kprintf(".%s", device_get_nameunit(tmp)); 1611 kprintf("\n"); 1612 } 1613 if (!device_is_quiet(dev)) 1614 device_print_child(bus, dev); 1615 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) { 1616 kprintf("%s: probing asynchronously\n", 1617 device_get_nameunit(dev)); 1618 dev->state = DS_INPROGRESS; 1619 device_attach_async(dev); 1620 error = 0; 1621 } else { 1622 error = device_doattach(dev); 1623 } 1624 return(error); 1625 } 1626 1627 /* 1628 * Device is known to be alive, do the attach asynchronously. 1629 * 1630 * The MP lock is held by all threads. 1631 */ 1632 static void 1633 device_attach_async(device_t dev) 1634 { 1635 thread_t td; 1636 1637 atomic_add_int(&numasyncthreads, 1); 1638 lwkt_create(device_attach_thread, dev, &td, NULL, 1639 0, 0, (dev->desc ? dev->desc : "devattach")); 1640 } 1641 1642 static void 1643 device_attach_thread(void *arg) 1644 { 1645 device_t dev = arg; 1646 1647 (void)device_doattach(dev); 1648 atomic_subtract_int(&numasyncthreads, 1); 1649 wakeup(&numasyncthreads); 1650 } 1651 1652 /* 1653 * Device is known to be alive, do the attach (synchronous or asynchronous) 1654 */ 1655 static int 1656 device_doattach(device_t dev) 1657 { 1658 device_t bus = dev->parent; 1659 int hasclass = (dev->devclass != 0); 1660 int error; 1661 1662 error = DEVICE_ATTACH(dev); 1663 if (error == 0) { 1664 dev->state = DS_ATTACHED; 1665 if (bootverbose && !device_is_quiet(dev)) 1666 device_print_child(bus, dev); 1667 devadded(dev); 1668 } else { 1669 kprintf("device_probe_and_attach: %s%d attach returned %d\n", 1670 dev->driver->name, dev->unit, error); 1671 /* Unset the class that was set in device_probe_child */ 1672 if (!hasclass) 1673 device_set_devclass(dev, 0); 1674 device_set_driver(dev, NULL); 1675 dev->state = DS_NOTPRESENT; 1676 } 1677 return(error); 1678 } 1679 1680 int 1681 device_detach(device_t dev) 1682 { 1683 int error; 1684 1685 PDEBUG(("%s", DEVICENAME(dev))); 1686 if (dev->state == DS_BUSY) 1687 return(EBUSY); 1688 if (dev->state != DS_ATTACHED) 1689 return(0); 1690 1691 if ((error = DEVICE_DETACH(dev)) != 0) 1692 return(error); 1693 devremoved(dev); 1694 device_printf(dev, "detached\n"); 1695 if (dev->parent) 1696 BUS_CHILD_DETACHED(dev->parent, dev); 1697 1698 if (!(dev->flags & DF_FIXEDCLASS)) 1699 devclass_delete_device(dev->devclass, dev); 1700 1701 dev->state = DS_NOTPRESENT; 1702 device_set_driver(dev, NULL); 1703 1704 return(0); 1705 } 1706 1707 int 1708 device_shutdown(device_t dev) 1709 { 1710 if (dev->state < DS_ATTACHED) 1711 return 0; 1712 PDEBUG(("%s", DEVICENAME(dev))); 1713 return DEVICE_SHUTDOWN(dev); 1714 } 1715 1716 int 1717 device_set_unit(device_t dev, int unit) 1718 { 1719 devclass_t dc; 1720 int err; 1721 1722 dc = device_get_devclass(dev); 1723 if (unit < dc->maxunit && dc->devices[unit]) 1724 return(EBUSY); 1725 err = devclass_delete_device(dc, dev); 1726 if (err) 1727 return(err); 1728 dev->unit = unit; 1729 err = devclass_add_device(dc, dev); 1730 if (err) 1731 return(err); 1732 1733 bus_data_generation_update(); 1734 return(0); 1735 } 1736 1737 /*======================================*/ 1738 /* 1739 * Access functions for device resources. 1740 */ 1741 1742 /* Supplied by config(8) in ioconf.c */ 1743 extern struct config_device config_devtab[]; 1744 extern int devtab_count; 1745 1746 /* Runtime version */ 1747 struct config_device *devtab = config_devtab; 1748 1749 static int 1750 resource_new_name(const char *name, int unit) 1751 { 1752 struct config_device *new; 1753 1754 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP, 1755 M_INTWAIT | M_ZERO); 1756 if (new == NULL) 1757 return(-1); 1758 if (devtab && devtab_count > 0) 1759 bcopy(devtab, new, devtab_count * sizeof(*new)); 1760 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 1761 if (new[devtab_count].name == NULL) { 1762 kfree(new, M_TEMP); 1763 return(-1); 1764 } 1765 strcpy(new[devtab_count].name, name); 1766 new[devtab_count].unit = unit; 1767 new[devtab_count].resource_count = 0; 1768 new[devtab_count].resources = NULL; 1769 if (devtab && devtab != config_devtab) 1770 kfree(devtab, M_TEMP); 1771 devtab = new; 1772 return devtab_count++; 1773 } 1774 1775 static int 1776 resource_new_resname(int j, const char *resname, resource_type type) 1777 { 1778 struct config_resource *new; 1779 int i; 1780 1781 i = devtab[j].resource_count; 1782 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 1783 if (new == NULL) 1784 return(-1); 1785 if (devtab[j].resources && i > 0) 1786 bcopy(devtab[j].resources, new, i * sizeof(*new)); 1787 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 1788 if (new[i].name == NULL) { 1789 kfree(new, M_TEMP); 1790 return(-1); 1791 } 1792 strcpy(new[i].name, resname); 1793 new[i].type = type; 1794 if (devtab[j].resources) 1795 kfree(devtab[j].resources, M_TEMP); 1796 devtab[j].resources = new; 1797 devtab[j].resource_count = i + 1; 1798 return(i); 1799 } 1800 1801 static int 1802 resource_match_string(int i, const char *resname, const char *value) 1803 { 1804 int j; 1805 struct config_resource *res; 1806 1807 for (j = 0, res = devtab[i].resources; 1808 j < devtab[i].resource_count; j++, res++) 1809 if (!strcmp(res->name, resname) 1810 && res->type == RES_STRING 1811 && !strcmp(res->u.stringval, value)) 1812 return(j); 1813 return(-1); 1814 } 1815 1816 static int 1817 resource_find(const char *name, int unit, const char *resname, 1818 struct config_resource **result) 1819 { 1820 int i, j; 1821 struct config_resource *res; 1822 1823 /* 1824 * First check specific instances, then generic. 1825 */ 1826 for (i = 0; i < devtab_count; i++) { 1827 if (devtab[i].unit < 0) 1828 continue; 1829 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1830 res = devtab[i].resources; 1831 for (j = 0; j < devtab[i].resource_count; j++, res++) 1832 if (!strcmp(res->name, resname)) { 1833 *result = res; 1834 return(0); 1835 } 1836 } 1837 } 1838 for (i = 0; i < devtab_count; i++) { 1839 if (devtab[i].unit >= 0) 1840 continue; 1841 /* XXX should this `&& devtab[i].unit == unit' be here? */ 1842 /* XXX if so, then the generic match does nothing */ 1843 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1844 res = devtab[i].resources; 1845 for (j = 0; j < devtab[i].resource_count; j++, res++) 1846 if (!strcmp(res->name, resname)) { 1847 *result = res; 1848 return(0); 1849 } 1850 } 1851 } 1852 return(ENOENT); 1853 } 1854 1855 int 1856 resource_int_value(const char *name, int unit, const char *resname, int *result) 1857 { 1858 int error; 1859 struct config_resource *res; 1860 1861 if ((error = resource_find(name, unit, resname, &res)) != 0) 1862 return(error); 1863 if (res->type != RES_INT) 1864 return(EFTYPE); 1865 *result = res->u.intval; 1866 return(0); 1867 } 1868 1869 int 1870 resource_long_value(const char *name, int unit, const char *resname, 1871 long *result) 1872 { 1873 int error; 1874 struct config_resource *res; 1875 1876 if ((error = resource_find(name, unit, resname, &res)) != 0) 1877 return(error); 1878 if (res->type != RES_LONG) 1879 return(EFTYPE); 1880 *result = res->u.longval; 1881 return(0); 1882 } 1883 1884 int 1885 resource_string_value(const char *name, int unit, const char *resname, 1886 char **result) 1887 { 1888 int error; 1889 struct config_resource *res; 1890 1891 if ((error = resource_find(name, unit, resname, &res)) != 0) 1892 return(error); 1893 if (res->type != RES_STRING) 1894 return(EFTYPE); 1895 *result = res->u.stringval; 1896 return(0); 1897 } 1898 1899 int 1900 resource_query_string(int i, const char *resname, const char *value) 1901 { 1902 if (i < 0) 1903 i = 0; 1904 else 1905 i = i + 1; 1906 for (; i < devtab_count; i++) 1907 if (resource_match_string(i, resname, value) >= 0) 1908 return(i); 1909 return(-1); 1910 } 1911 1912 int 1913 resource_locate(int i, const char *resname) 1914 { 1915 if (i < 0) 1916 i = 0; 1917 else 1918 i = i + 1; 1919 for (; i < devtab_count; i++) 1920 if (!strcmp(devtab[i].name, resname)) 1921 return(i); 1922 return(-1); 1923 } 1924 1925 int 1926 resource_count(void) 1927 { 1928 return(devtab_count); 1929 } 1930 1931 char * 1932 resource_query_name(int i) 1933 { 1934 return(devtab[i].name); 1935 } 1936 1937 int 1938 resource_query_unit(int i) 1939 { 1940 return(devtab[i].unit); 1941 } 1942 1943 static int 1944 resource_create(const char *name, int unit, const char *resname, 1945 resource_type type, struct config_resource **result) 1946 { 1947 int i, j; 1948 struct config_resource *res = NULL; 1949 1950 for (i = 0; i < devtab_count; i++) 1951 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 1952 res = devtab[i].resources; 1953 break; 1954 } 1955 if (res == NULL) { 1956 i = resource_new_name(name, unit); 1957 if (i < 0) 1958 return(ENOMEM); 1959 res = devtab[i].resources; 1960 } 1961 for (j = 0; j < devtab[i].resource_count; j++, res++) 1962 if (!strcmp(res->name, resname)) { 1963 *result = res; 1964 return(0); 1965 } 1966 j = resource_new_resname(i, resname, type); 1967 if (j < 0) 1968 return(ENOMEM); 1969 res = &devtab[i].resources[j]; 1970 *result = res; 1971 return(0); 1972 } 1973 1974 int 1975 resource_set_int(const char *name, int unit, const char *resname, int value) 1976 { 1977 int error; 1978 struct config_resource *res; 1979 1980 error = resource_create(name, unit, resname, RES_INT, &res); 1981 if (error) 1982 return(error); 1983 if (res->type != RES_INT) 1984 return(EFTYPE); 1985 res->u.intval = value; 1986 return(0); 1987 } 1988 1989 int 1990 resource_set_long(const char *name, int unit, const char *resname, long value) 1991 { 1992 int error; 1993 struct config_resource *res; 1994 1995 error = resource_create(name, unit, resname, RES_LONG, &res); 1996 if (error) 1997 return(error); 1998 if (res->type != RES_LONG) 1999 return(EFTYPE); 2000 res->u.longval = value; 2001 return(0); 2002 } 2003 2004 int 2005 resource_set_string(const char *name, int unit, const char *resname, 2006 const char *value) 2007 { 2008 int error; 2009 struct config_resource *res; 2010 2011 error = resource_create(name, unit, resname, RES_STRING, &res); 2012 if (error) 2013 return(error); 2014 if (res->type != RES_STRING) 2015 return(EFTYPE); 2016 if (res->u.stringval) 2017 kfree(res->u.stringval, M_TEMP); 2018 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 2019 if (res->u.stringval == NULL) 2020 return(ENOMEM); 2021 strcpy(res->u.stringval, value); 2022 return(0); 2023 } 2024 2025 static void 2026 resource_cfgload(void *dummy __unused) 2027 { 2028 struct config_resource *res, *cfgres; 2029 int i, j; 2030 int error; 2031 char *name, *resname; 2032 int unit; 2033 resource_type type; 2034 char *stringval; 2035 int config_devtab_count; 2036 2037 config_devtab_count = devtab_count; 2038 devtab = NULL; 2039 devtab_count = 0; 2040 2041 for (i = 0; i < config_devtab_count; i++) { 2042 name = config_devtab[i].name; 2043 unit = config_devtab[i].unit; 2044 2045 for (j = 0; j < config_devtab[i].resource_count; j++) { 2046 cfgres = config_devtab[i].resources; 2047 resname = cfgres[j].name; 2048 type = cfgres[j].type; 2049 error = resource_create(name, unit, resname, type, 2050 &res); 2051 if (error) { 2052 kprintf("create resource %s%d: error %d\n", 2053 name, unit, error); 2054 continue; 2055 } 2056 if (res->type != type) { 2057 kprintf("type mismatch %s%d: %d != %d\n", 2058 name, unit, res->type, type); 2059 continue; 2060 } 2061 switch (type) { 2062 case RES_INT: 2063 res->u.intval = cfgres[j].u.intval; 2064 break; 2065 case RES_LONG: 2066 res->u.longval = cfgres[j].u.longval; 2067 break; 2068 case RES_STRING: 2069 if (res->u.stringval) 2070 kfree(res->u.stringval, M_TEMP); 2071 stringval = cfgres[j].u.stringval; 2072 res->u.stringval = kmalloc(strlen(stringval) + 1, 2073 M_TEMP, M_INTWAIT); 2074 if (res->u.stringval == NULL) 2075 break; 2076 strcpy(res->u.stringval, stringval); 2077 break; 2078 default: 2079 panic("unknown resource type %d", type); 2080 } 2081 } 2082 } 2083 } 2084 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0) 2085 2086 2087 /*======================================*/ 2088 /* 2089 * Some useful method implementations to make life easier for bus drivers. 2090 */ 2091 2092 void 2093 resource_list_init(struct resource_list *rl) 2094 { 2095 SLIST_INIT(rl); 2096 } 2097 2098 void 2099 resource_list_free(struct resource_list *rl) 2100 { 2101 struct resource_list_entry *rle; 2102 2103 while ((rle = SLIST_FIRST(rl)) != NULL) { 2104 if (rle->res) 2105 panic("resource_list_free: resource entry is busy"); 2106 SLIST_REMOVE_HEAD(rl, link); 2107 kfree(rle, M_BUS); 2108 } 2109 } 2110 2111 void 2112 resource_list_add(struct resource_list *rl, 2113 int type, int rid, 2114 u_long start, u_long end, u_long count) 2115 { 2116 struct resource_list_entry *rle; 2117 2118 rle = resource_list_find(rl, type, rid); 2119 if (rle == NULL) { 2120 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS, 2121 M_INTWAIT); 2122 if (!rle) 2123 panic("resource_list_add: can't record entry"); 2124 SLIST_INSERT_HEAD(rl, rle, link); 2125 rle->type = type; 2126 rle->rid = rid; 2127 rle->res = NULL; 2128 } 2129 2130 if (rle->res) 2131 panic("resource_list_add: resource entry is busy"); 2132 2133 rle->start = start; 2134 rle->end = end; 2135 rle->count = count; 2136 } 2137 2138 struct resource_list_entry* 2139 resource_list_find(struct resource_list *rl, 2140 int type, int rid) 2141 { 2142 struct resource_list_entry *rle; 2143 2144 SLIST_FOREACH(rle, rl, link) 2145 if (rle->type == type && rle->rid == rid) 2146 return(rle); 2147 return(NULL); 2148 } 2149 2150 void 2151 resource_list_delete(struct resource_list *rl, 2152 int type, int rid) 2153 { 2154 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 2155 2156 if (rle) { 2157 if (rle->res != NULL) 2158 panic("resource_list_delete: resource has not been released"); 2159 SLIST_REMOVE(rl, rle, resource_list_entry, link); 2160 kfree(rle, M_BUS); 2161 } 2162 } 2163 2164 struct resource * 2165 resource_list_alloc(struct resource_list *rl, 2166 device_t bus, device_t child, 2167 int type, int *rid, 2168 u_long start, u_long end, 2169 u_long count, u_int flags) 2170 { 2171 struct resource_list_entry *rle = 0; 2172 int passthrough = (device_get_parent(child) != bus); 2173 int isdefault = (start == 0UL && end == ~0UL); 2174 2175 if (passthrough) { 2176 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2177 type, rid, 2178 start, end, count, flags)); 2179 } 2180 2181 rle = resource_list_find(rl, type, *rid); 2182 2183 if (!rle) 2184 return(0); /* no resource of that type/rid */ 2185 2186 if (rle->res) 2187 panic("resource_list_alloc: resource entry is busy"); 2188 2189 if (isdefault) { 2190 start = rle->start; 2191 count = max(count, rle->count); 2192 end = max(rle->end, start + count - 1); 2193 } 2194 2195 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2196 type, rid, start, end, count, flags); 2197 2198 /* 2199 * Record the new range. 2200 */ 2201 if (rle->res) { 2202 rle->start = rman_get_start(rle->res); 2203 rle->end = rman_get_end(rle->res); 2204 rle->count = count; 2205 } 2206 2207 return(rle->res); 2208 } 2209 2210 int 2211 resource_list_release(struct resource_list *rl, 2212 device_t bus, device_t child, 2213 int type, int rid, struct resource *res) 2214 { 2215 struct resource_list_entry *rle = 0; 2216 int passthrough = (device_get_parent(child) != bus); 2217 int error; 2218 2219 if (passthrough) { 2220 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2221 type, rid, res)); 2222 } 2223 2224 rle = resource_list_find(rl, type, rid); 2225 2226 if (!rle) 2227 panic("resource_list_release: can't find resource"); 2228 if (!rle->res) 2229 panic("resource_list_release: resource entry is not busy"); 2230 2231 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2232 type, rid, res); 2233 if (error) 2234 return(error); 2235 2236 rle->res = NULL; 2237 return(0); 2238 } 2239 2240 int 2241 resource_list_print_type(struct resource_list *rl, const char *name, int type, 2242 const char *format) 2243 { 2244 struct resource_list_entry *rle; 2245 int printed, retval; 2246 2247 printed = 0; 2248 retval = 0; 2249 /* Yes, this is kinda cheating */ 2250 SLIST_FOREACH(rle, rl, link) { 2251 if (rle->type == type) { 2252 if (printed == 0) 2253 retval += kprintf(" %s ", name); 2254 else 2255 retval += kprintf(","); 2256 printed++; 2257 retval += kprintf(format, rle->start); 2258 if (rle->count > 1) { 2259 retval += kprintf("-"); 2260 retval += kprintf(format, rle->start + 2261 rle->count - 1); 2262 } 2263 } 2264 } 2265 return(retval); 2266 } 2267 2268 /* 2269 * Generic driver/device identify functions. These will install a device 2270 * rendezvous point under the parent using the same name as the driver 2271 * name, which will at a later time be probed and attached. 2272 * 2273 * These functions are used when the parent does not 'scan' its bus for 2274 * matching devices, or for the particular devices using these functions, 2275 * or when the device is a pseudo or synthesized device (such as can be 2276 * found under firewire and ppbus). 2277 */ 2278 int 2279 bus_generic_identify(driver_t *driver, device_t parent) 2280 { 2281 if (parent->state == DS_ATTACHED) 2282 return (0); 2283 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); 2284 return (0); 2285 } 2286 2287 int 2288 bus_generic_identify_sameunit(driver_t *driver, device_t parent) 2289 { 2290 if (parent->state == DS_ATTACHED) 2291 return (0); 2292 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); 2293 return (0); 2294 } 2295 2296 /* 2297 * Call DEVICE_IDENTIFY for each driver. 2298 */ 2299 int 2300 bus_generic_probe(device_t dev) 2301 { 2302 devclass_t dc = dev->devclass; 2303 driverlink_t dl; 2304 2305 TAILQ_FOREACH(dl, &dc->drivers, link) { 2306 DEVICE_IDENTIFY(dl->driver, dev); 2307 } 2308 2309 return(0); 2310 } 2311 2312 /* 2313 * This is an aweful hack due to the isa bus and autoconf code not 2314 * probing the ISA devices until after everything else has configured. 2315 * The ISA bus did a dummy attach long ago so we have to set it back 2316 * to an earlier state so the probe thinks its the initial probe and 2317 * not a bus rescan. 2318 * 2319 * XXX remove by properly defering the ISA bus scan. 2320 */ 2321 int 2322 bus_generic_probe_hack(device_t dev) 2323 { 2324 if (dev->state == DS_ATTACHED) { 2325 dev->state = DS_ALIVE; 2326 bus_generic_probe(dev); 2327 dev->state = DS_ATTACHED; 2328 } 2329 return (0); 2330 } 2331 2332 int 2333 bus_generic_attach(device_t dev) 2334 { 2335 device_t child; 2336 2337 TAILQ_FOREACH(child, &dev->children, link) { 2338 device_probe_and_attach(child); 2339 } 2340 2341 return(0); 2342 } 2343 2344 int 2345 bus_generic_detach(device_t dev) 2346 { 2347 device_t child; 2348 int error; 2349 2350 if (dev->state != DS_ATTACHED) 2351 return(EBUSY); 2352 2353 TAILQ_FOREACH(child, &dev->children, link) 2354 if ((error = device_detach(child)) != 0) 2355 return(error); 2356 2357 return 0; 2358 } 2359 2360 int 2361 bus_generic_shutdown(device_t dev) 2362 { 2363 device_t child; 2364 2365 TAILQ_FOREACH(child, &dev->children, link) 2366 device_shutdown(child); 2367 2368 return(0); 2369 } 2370 2371 int 2372 bus_generic_suspend(device_t dev) 2373 { 2374 int error; 2375 device_t child, child2; 2376 2377 TAILQ_FOREACH(child, &dev->children, link) { 2378 error = DEVICE_SUSPEND(child); 2379 if (error) { 2380 for (child2 = TAILQ_FIRST(&dev->children); 2381 child2 && child2 != child; 2382 child2 = TAILQ_NEXT(child2, link)) 2383 DEVICE_RESUME(child2); 2384 return(error); 2385 } 2386 } 2387 return(0); 2388 } 2389 2390 int 2391 bus_generic_resume(device_t dev) 2392 { 2393 device_t child; 2394 2395 TAILQ_FOREACH(child, &dev->children, link) 2396 DEVICE_RESUME(child); 2397 /* if resume fails, there's nothing we can usefully do... */ 2398 2399 return(0); 2400 } 2401 2402 int 2403 bus_print_child_header(device_t dev, device_t child) 2404 { 2405 int retval = 0; 2406 2407 if (device_get_desc(child)) 2408 retval += device_printf(child, "<%s>", device_get_desc(child)); 2409 else 2410 retval += kprintf("%s", device_get_nameunit(child)); 2411 if (bootverbose) { 2412 if (child->state != DS_ATTACHED) 2413 kprintf(" [tentative]"); 2414 else 2415 kprintf(" [attached!]"); 2416 } 2417 return(retval); 2418 } 2419 2420 int 2421 bus_print_child_footer(device_t dev, device_t child) 2422 { 2423 return(kprintf(" on %s\n", device_get_nameunit(dev))); 2424 } 2425 2426 device_t 2427 bus_generic_add_child(device_t dev, device_t child, int order, 2428 const char *name, int unit) 2429 { 2430 if (dev->parent) 2431 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); 2432 else 2433 dev = device_add_child_ordered(child, order, name, unit); 2434 return(dev); 2435 2436 } 2437 2438 int 2439 bus_generic_print_child(device_t dev, device_t child) 2440 { 2441 int retval = 0; 2442 2443 retval += bus_print_child_header(dev, child); 2444 retval += bus_print_child_footer(dev, child); 2445 2446 return(retval); 2447 } 2448 2449 int 2450 bus_generic_read_ivar(device_t dev, device_t child, int index, 2451 uintptr_t * result) 2452 { 2453 int error; 2454 2455 if (dev->parent) 2456 error = BUS_READ_IVAR(dev->parent, child, index, result); 2457 else 2458 error = ENOENT; 2459 return (error); 2460 } 2461 2462 int 2463 bus_generic_write_ivar(device_t dev, device_t child, int index, 2464 uintptr_t value) 2465 { 2466 int error; 2467 2468 if (dev->parent) 2469 error = BUS_WRITE_IVAR(dev->parent, child, index, value); 2470 else 2471 error = ENOENT; 2472 return (error); 2473 } 2474 2475 /* 2476 * Resource list are used for iterations, do not recurse. 2477 */ 2478 struct resource_list * 2479 bus_generic_get_resource_list(device_t dev, device_t child) 2480 { 2481 return (NULL); 2482 } 2483 2484 void 2485 bus_generic_driver_added(device_t dev, driver_t *driver) 2486 { 2487 device_t child; 2488 2489 DEVICE_IDENTIFY(driver, dev); 2490 TAILQ_FOREACH(child, &dev->children, link) { 2491 if (child->state == DS_NOTPRESENT) 2492 device_probe_and_attach(child); 2493 } 2494 } 2495 2496 int 2497 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 2498 int flags, driver_intr_t *intr, void *arg, 2499 void **cookiep, lwkt_serialize_t serializer) 2500 { 2501 /* Propagate up the bus hierarchy until someone handles it. */ 2502 if (dev->parent) 2503 return(BUS_SETUP_INTR(dev->parent, child, irq, flags, 2504 intr, arg, cookiep, serializer)); 2505 else 2506 return(EINVAL); 2507 } 2508 2509 int 2510 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 2511 void *cookie) 2512 { 2513 /* Propagate up the bus hierarchy until someone handles it. */ 2514 if (dev->parent) 2515 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 2516 else 2517 return(EINVAL); 2518 } 2519 2520 int 2521 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 2522 { 2523 if (dev->parent) 2524 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 2525 else 2526 return(0); 2527 } 2528 2529 void 2530 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 2531 { 2532 if (dev->parent) 2533 BUS_ENABLE_INTR(dev->parent, child, cookie); 2534 } 2535 2536 int 2537 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig, 2538 enum intr_polarity pol) 2539 { 2540 /* Propagate up the bus hierarchy until someone handles it. */ 2541 if (dev->parent) 2542 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol)); 2543 else 2544 return(EINVAL); 2545 } 2546 2547 struct resource * 2548 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 2549 u_long start, u_long end, u_long count, u_int flags) 2550 { 2551 /* Propagate up the bus hierarchy until someone handles it. */ 2552 if (dev->parent) 2553 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 2554 start, end, count, flags)); 2555 else 2556 return(NULL); 2557 } 2558 2559 int 2560 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 2561 struct resource *r) 2562 { 2563 /* Propagate up the bus hierarchy until someone handles it. */ 2564 if (dev->parent) 2565 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 2566 else 2567 return(EINVAL); 2568 } 2569 2570 int 2571 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 2572 struct resource *r) 2573 { 2574 /* Propagate up the bus hierarchy until someone handles it. */ 2575 if (dev->parent) 2576 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 2577 else 2578 return(EINVAL); 2579 } 2580 2581 int 2582 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 2583 int rid, struct resource *r) 2584 { 2585 /* Propagate up the bus hierarchy until someone handles it. */ 2586 if (dev->parent) 2587 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 2588 r)); 2589 else 2590 return(EINVAL); 2591 } 2592 2593 int 2594 bus_generic_get_resource(device_t dev, device_t child, int type, int rid, 2595 u_long *startp, u_long *countp) 2596 { 2597 int error; 2598 2599 error = ENOENT; 2600 if (dev->parent) { 2601 error = BUS_GET_RESOURCE(dev->parent, child, type, rid, 2602 startp, countp); 2603 } 2604 return (error); 2605 } 2606 2607 int 2608 bus_generic_set_resource(device_t dev, device_t child, int type, int rid, 2609 u_long start, u_long count) 2610 { 2611 int error; 2612 2613 error = EINVAL; 2614 if (dev->parent) { 2615 error = BUS_SET_RESOURCE(dev->parent, child, type, rid, 2616 start, count); 2617 } 2618 return (error); 2619 } 2620 2621 void 2622 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) 2623 { 2624 if (dev->parent) 2625 BUS_DELETE_RESOURCE(dev, child, type, rid); 2626 } 2627 2628 int 2629 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2630 u_long *startp, u_long *countp) 2631 { 2632 struct resource_list *rl = NULL; 2633 struct resource_list_entry *rle = NULL; 2634 2635 rl = BUS_GET_RESOURCE_LIST(dev, child); 2636 if (!rl) 2637 return(EINVAL); 2638 2639 rle = resource_list_find(rl, type, rid); 2640 if (!rle) 2641 return(ENOENT); 2642 2643 if (startp) 2644 *startp = rle->start; 2645 if (countp) 2646 *countp = rle->count; 2647 2648 return(0); 2649 } 2650 2651 int 2652 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2653 u_long start, u_long count) 2654 { 2655 struct resource_list *rl = NULL; 2656 2657 rl = BUS_GET_RESOURCE_LIST(dev, child); 2658 if (!rl) 2659 return(EINVAL); 2660 2661 resource_list_add(rl, type, rid, start, (start + count - 1), count); 2662 2663 return(0); 2664 } 2665 2666 void 2667 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2668 { 2669 struct resource_list *rl = NULL; 2670 2671 rl = BUS_GET_RESOURCE_LIST(dev, child); 2672 if (!rl) 2673 return; 2674 2675 resource_list_delete(rl, type, rid); 2676 } 2677 2678 int 2679 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2680 int rid, struct resource *r) 2681 { 2682 struct resource_list *rl = NULL; 2683 2684 rl = BUS_GET_RESOURCE_LIST(dev, child); 2685 if (!rl) 2686 return(EINVAL); 2687 2688 return(resource_list_release(rl, dev, child, type, rid, r)); 2689 } 2690 2691 struct resource * 2692 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2693 int *rid, u_long start, u_long end, u_long count, u_int flags) 2694 { 2695 struct resource_list *rl = NULL; 2696 2697 rl = BUS_GET_RESOURCE_LIST(dev, child); 2698 if (!rl) 2699 return(NULL); 2700 2701 return(resource_list_alloc(rl, dev, child, type, rid, 2702 start, end, count, flags)); 2703 } 2704 2705 int 2706 bus_generic_child_present(device_t bus, device_t child) 2707 { 2708 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2709 } 2710 2711 2712 /* 2713 * Some convenience functions to make it easier for drivers to use the 2714 * resource-management functions. All these really do is hide the 2715 * indirection through the parent's method table, making for slightly 2716 * less-wordy code. In the future, it might make sense for this code 2717 * to maintain some sort of a list of resources allocated by each device. 2718 */ 2719 int 2720 bus_alloc_resources(device_t dev, struct resource_spec *rs, 2721 struct resource **res) 2722 { 2723 int i; 2724 2725 for (i = 0; rs[i].type != -1; i++) 2726 res[i] = NULL; 2727 for (i = 0; rs[i].type != -1; i++) { 2728 res[i] = bus_alloc_resource_any(dev, 2729 rs[i].type, &rs[i].rid, rs[i].flags); 2730 if (res[i] == NULL) { 2731 bus_release_resources(dev, rs, res); 2732 return (ENXIO); 2733 } 2734 } 2735 return (0); 2736 } 2737 2738 void 2739 bus_release_resources(device_t dev, const struct resource_spec *rs, 2740 struct resource **res) 2741 { 2742 int i; 2743 2744 for (i = 0; rs[i].type != -1; i++) 2745 if (res[i] != NULL) { 2746 bus_release_resource( 2747 dev, rs[i].type, rs[i].rid, res[i]); 2748 res[i] = NULL; 2749 } 2750 } 2751 2752 struct resource * 2753 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2754 u_long count, u_int flags) 2755 { 2756 if (dev->parent == 0) 2757 return(0); 2758 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2759 count, flags)); 2760 } 2761 2762 int 2763 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2764 { 2765 if (dev->parent == 0) 2766 return(EINVAL); 2767 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2768 } 2769 2770 int 2771 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2772 { 2773 if (dev->parent == 0) 2774 return(EINVAL); 2775 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2776 } 2777 2778 int 2779 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2780 { 2781 if (dev->parent == 0) 2782 return(EINVAL); 2783 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2784 } 2785 2786 int 2787 bus_setup_intr(device_t dev, struct resource *r, int flags, 2788 driver_intr_t handler, void *arg, 2789 void **cookiep, lwkt_serialize_t serializer) 2790 { 2791 if (dev->parent == 0) 2792 return(EINVAL); 2793 return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 2794 cookiep, serializer)); 2795 } 2796 2797 int 2798 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2799 { 2800 if (dev->parent == 0) 2801 return(EINVAL); 2802 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2803 } 2804 2805 void 2806 bus_enable_intr(device_t dev, void *cookie) 2807 { 2808 if (dev->parent) 2809 BUS_ENABLE_INTR(dev->parent, dev, cookie); 2810 } 2811 2812 int 2813 bus_disable_intr(device_t dev, void *cookie) 2814 { 2815 if (dev->parent) 2816 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 2817 else 2818 return(0); 2819 } 2820 2821 int 2822 bus_set_resource(device_t dev, int type, int rid, 2823 u_long start, u_long count) 2824 { 2825 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2826 start, count)); 2827 } 2828 2829 int 2830 bus_get_resource(device_t dev, int type, int rid, 2831 u_long *startp, u_long *countp) 2832 { 2833 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2834 startp, countp)); 2835 } 2836 2837 u_long 2838 bus_get_resource_start(device_t dev, int type, int rid) 2839 { 2840 u_long start, count; 2841 int error; 2842 2843 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2844 &start, &count); 2845 if (error) 2846 return(0); 2847 return(start); 2848 } 2849 2850 u_long 2851 bus_get_resource_count(device_t dev, int type, int rid) 2852 { 2853 u_long start, count; 2854 int error; 2855 2856 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2857 &start, &count); 2858 if (error) 2859 return(0); 2860 return(count); 2861 } 2862 2863 void 2864 bus_delete_resource(device_t dev, int type, int rid) 2865 { 2866 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2867 } 2868 2869 int 2870 bus_child_present(device_t child) 2871 { 2872 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2873 } 2874 2875 int 2876 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2877 { 2878 device_t parent; 2879 2880 parent = device_get_parent(child); 2881 if (parent == NULL) { 2882 *buf = '\0'; 2883 return (0); 2884 } 2885 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2886 } 2887 2888 int 2889 bus_child_location_str(device_t child, char *buf, size_t buflen) 2890 { 2891 device_t parent; 2892 2893 parent = device_get_parent(child); 2894 if (parent == NULL) { 2895 *buf = '\0'; 2896 return (0); 2897 } 2898 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2899 } 2900 2901 static int 2902 root_print_child(device_t dev, device_t child) 2903 { 2904 return(0); 2905 } 2906 2907 static int 2908 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2909 void **cookiep, lwkt_serialize_t serializer) 2910 { 2911 /* 2912 * If an interrupt mapping gets to here something bad has happened. 2913 */ 2914 panic("root_setup_intr"); 2915 } 2916 2917 /* 2918 * If we get here, assume that the device is permanant and really is 2919 * present in the system. Removable bus drivers are expected to intercept 2920 * this call long before it gets here. We return -1 so that drivers that 2921 * really care can check vs -1 or some ERRNO returned higher in the food 2922 * chain. 2923 */ 2924 static int 2925 root_child_present(device_t dev, device_t child) 2926 { 2927 return(-1); 2928 } 2929 2930 /* 2931 * XXX NOTE! other defaults may be set in bus_if.m 2932 */ 2933 static kobj_method_t root_methods[] = { 2934 /* Device interface */ 2935 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2936 KOBJMETHOD(device_suspend, bus_generic_suspend), 2937 KOBJMETHOD(device_resume, bus_generic_resume), 2938 2939 /* Bus interface */ 2940 KOBJMETHOD(bus_add_child, bus_generic_add_child), 2941 KOBJMETHOD(bus_print_child, root_print_child), 2942 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2943 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2944 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2945 KOBJMETHOD(bus_child_present, root_child_present), 2946 2947 { 0, 0 } 2948 }; 2949 2950 static driver_t root_driver = { 2951 "root", 2952 root_methods, 2953 1, /* no softc */ 2954 }; 2955 2956 device_t root_bus; 2957 devclass_t root_devclass; 2958 2959 static int 2960 root_bus_module_handler(module_t mod, int what, void* arg) 2961 { 2962 switch (what) { 2963 case MOD_LOAD: 2964 TAILQ_INIT(&bus_data_devices); 2965 root_bus = make_device(NULL, "root", 0); 2966 root_bus->desc = "System root bus"; 2967 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2968 root_bus->driver = &root_driver; 2969 root_bus->state = DS_ALIVE; 2970 root_devclass = devclass_find_internal("root", NULL, FALSE); 2971 devinit(); 2972 return(0); 2973 2974 case MOD_SHUTDOWN: 2975 device_shutdown(root_bus); 2976 return(0); 2977 default: 2978 return(0); 2979 } 2980 } 2981 2982 static moduledata_t root_bus_mod = { 2983 "rootbus", 2984 root_bus_module_handler, 2985 0 2986 }; 2987 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2988 2989 void 2990 root_bus_configure(void) 2991 { 2992 int warncount; 2993 device_t dev; 2994 2995 PDEBUG((".")); 2996 2997 /* 2998 * handle device_identify based device attachments to the root_bus 2999 * (typically nexus). 3000 */ 3001 bus_generic_probe(root_bus); 3002 3003 /* 3004 * Probe and attach the devices under root_bus. 3005 */ 3006 TAILQ_FOREACH(dev, &root_bus->children, link) { 3007 device_probe_and_attach(dev); 3008 } 3009 3010 /* 3011 * Wait for all asynchronous attaches to complete. If we don't 3012 * our legacy ISA bus scan could steal device unit numbers or 3013 * even I/O ports. 3014 */ 3015 warncount = 10; 3016 if (numasyncthreads) 3017 kprintf("Waiting for async drivers to attach\n"); 3018 while (numasyncthreads > 0) { 3019 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK) 3020 --warncount; 3021 if (warncount == 0) { 3022 kprintf("Warning: Still waiting for %d " 3023 "drivers to attach\n", numasyncthreads); 3024 } else if (warncount == -30) { 3025 kprintf("Giving up on %d drivers\n", numasyncthreads); 3026 break; 3027 } 3028 } 3029 root_bus->state = DS_ATTACHED; 3030 } 3031 3032 int 3033 driver_module_handler(module_t mod, int what, void *arg) 3034 { 3035 int error; 3036 struct driver_module_data *dmd; 3037 devclass_t bus_devclass; 3038 kobj_class_t driver; 3039 const char *parentname; 3040 3041 dmd = (struct driver_module_data *)arg; 3042 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 3043 error = 0; 3044 3045 switch (what) { 3046 case MOD_LOAD: 3047 if (dmd->dmd_chainevh) 3048 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3049 3050 driver = dmd->dmd_driver; 3051 PDEBUG(("Loading module: driver %s on bus %s", 3052 DRIVERNAME(driver), dmd->dmd_busname)); 3053 3054 /* 3055 * If the driver has any base classes, make the 3056 * devclass inherit from the devclass of the driver's 3057 * first base class. This will allow the system to 3058 * search for drivers in both devclasses for children 3059 * of a device using this driver. 3060 */ 3061 if (driver->baseclasses) 3062 parentname = driver->baseclasses[0]->name; 3063 else 3064 parentname = NULL; 3065 *dmd->dmd_devclass = devclass_find_internal(driver->name, 3066 parentname, TRUE); 3067 3068 error = devclass_add_driver(bus_devclass, driver); 3069 if (error) 3070 break; 3071 break; 3072 3073 case MOD_UNLOAD: 3074 PDEBUG(("Unloading module: driver %s from bus %s", 3075 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 3076 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 3077 3078 if (!error && dmd->dmd_chainevh) 3079 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3080 break; 3081 } 3082 3083 return (error); 3084 } 3085 3086 #ifdef BUS_DEBUG 3087 3088 /* 3089 * The _short versions avoid iteration by not calling anything that prints 3090 * more than oneliners. I love oneliners. 3091 */ 3092 3093 static void 3094 print_device_short(device_t dev, int indent) 3095 { 3096 if (!dev) 3097 return; 3098 3099 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 3100 dev->unit, dev->desc, 3101 (dev->parent? "":"no "), 3102 (TAILQ_EMPTY(&dev->children)? "no ":""), 3103 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 3104 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 3105 (dev->flags&DF_WILDCARD? "wildcard,":""), 3106 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 3107 (dev->ivars? "":"no "), 3108 (dev->softc? "":"no "), 3109 dev->busy)); 3110 } 3111 3112 static void 3113 print_device(device_t dev, int indent) 3114 { 3115 if (!dev) 3116 return; 3117 3118 print_device_short(dev, indent); 3119 3120 indentprintf(("Parent:\n")); 3121 print_device_short(dev->parent, indent+1); 3122 indentprintf(("Driver:\n")); 3123 print_driver_short(dev->driver, indent+1); 3124 indentprintf(("Devclass:\n")); 3125 print_devclass_short(dev->devclass, indent+1); 3126 } 3127 3128 /* 3129 * Print the device and all its children (indented). 3130 */ 3131 void 3132 print_device_tree_short(device_t dev, int indent) 3133 { 3134 device_t child; 3135 3136 if (!dev) 3137 return; 3138 3139 print_device_short(dev, indent); 3140 3141 TAILQ_FOREACH(child, &dev->children, link) 3142 print_device_tree_short(child, indent+1); 3143 } 3144 3145 /* 3146 * Print the device and all its children (indented). 3147 */ 3148 void 3149 print_device_tree(device_t dev, int indent) 3150 { 3151 device_t child; 3152 3153 if (!dev) 3154 return; 3155 3156 print_device(dev, indent); 3157 3158 TAILQ_FOREACH(child, &dev->children, link) 3159 print_device_tree(child, indent+1); 3160 } 3161 3162 static void 3163 print_driver_short(driver_t *driver, int indent) 3164 { 3165 if (!driver) 3166 return; 3167 3168 indentprintf(("driver %s: softc size = %d\n", 3169 driver->name, driver->size)); 3170 } 3171 3172 static void 3173 print_driver(driver_t *driver, int indent) 3174 { 3175 if (!driver) 3176 return; 3177 3178 print_driver_short(driver, indent); 3179 } 3180 3181 3182 static void 3183 print_driver_list(driver_list_t drivers, int indent) 3184 { 3185 driverlink_t driver; 3186 3187 TAILQ_FOREACH(driver, &drivers, link) 3188 print_driver(driver->driver, indent); 3189 } 3190 3191 static void 3192 print_devclass_short(devclass_t dc, int indent) 3193 { 3194 if (!dc) 3195 return; 3196 3197 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 3198 } 3199 3200 static void 3201 print_devclass(devclass_t dc, int indent) 3202 { 3203 int i; 3204 3205 if (!dc) 3206 return; 3207 3208 print_devclass_short(dc, indent); 3209 indentprintf(("Drivers:\n")); 3210 print_driver_list(dc->drivers, indent+1); 3211 3212 indentprintf(("Devices:\n")); 3213 for (i = 0; i < dc->maxunit; i++) 3214 if (dc->devices[i]) 3215 print_device(dc->devices[i], indent+1); 3216 } 3217 3218 void 3219 print_devclass_list_short(void) 3220 { 3221 devclass_t dc; 3222 3223 kprintf("Short listing of devclasses, drivers & devices:\n"); 3224 TAILQ_FOREACH(dc, &devclasses, link) { 3225 print_devclass_short(dc, 0); 3226 } 3227 } 3228 3229 void 3230 print_devclass_list(void) 3231 { 3232 devclass_t dc; 3233 3234 kprintf("Full listing of devclasses, drivers & devices:\n"); 3235 TAILQ_FOREACH(dc, &devclasses, link) { 3236 print_devclass(dc, 0); 3237 } 3238 } 3239 3240 #endif 3241 3242 /* 3243 * Check to see if a device is disabled via a disabled hint. 3244 */ 3245 int 3246 resource_disabled(const char *name, int unit) 3247 { 3248 int error, value; 3249 3250 error = resource_int_value(name, unit, "disabled", &value); 3251 if (error) 3252 return(0); 3253 return(value); 3254 } 3255 3256 /* 3257 * User-space access to the device tree. 3258 * 3259 * We implement a small set of nodes: 3260 * 3261 * hw.bus Single integer read method to obtain the 3262 * current generation count. 3263 * hw.bus.devices Reads the entire device tree in flat space. 3264 * hw.bus.rman Resource manager interface 3265 * 3266 * We might like to add the ability to scan devclasses and/or drivers to 3267 * determine what else is currently loaded/available. 3268 */ 3269 3270 static int 3271 sysctl_bus(SYSCTL_HANDLER_ARGS) 3272 { 3273 struct u_businfo ubus; 3274 3275 ubus.ub_version = BUS_USER_VERSION; 3276 ubus.ub_generation = bus_data_generation; 3277 3278 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 3279 } 3280 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 3281 "bus-related data"); 3282 3283 static int 3284 sysctl_devices(SYSCTL_HANDLER_ARGS) 3285 { 3286 int *name = (int *)arg1; 3287 u_int namelen = arg2; 3288 int index; 3289 struct device *dev; 3290 struct u_device udev; /* XXX this is a bit big */ 3291 int error; 3292 3293 if (namelen != 2) 3294 return (EINVAL); 3295 3296 if (bus_data_generation_check(name[0])) 3297 return (EINVAL); 3298 3299 index = name[1]; 3300 3301 /* 3302 * Scan the list of devices, looking for the requested index. 3303 */ 3304 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 3305 if (index-- == 0) 3306 break; 3307 } 3308 if (dev == NULL) 3309 return (ENOENT); 3310 3311 /* 3312 * Populate the return array. 3313 */ 3314 bzero(&udev, sizeof(udev)); 3315 udev.dv_handle = (uintptr_t)dev; 3316 udev.dv_parent = (uintptr_t)dev->parent; 3317 if (dev->nameunit != NULL) 3318 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 3319 if (dev->desc != NULL) 3320 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 3321 if (dev->driver != NULL && dev->driver->name != NULL) 3322 strlcpy(udev.dv_drivername, dev->driver->name, 3323 sizeof(udev.dv_drivername)); 3324 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 3325 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 3326 udev.dv_devflags = dev->devflags; 3327 udev.dv_flags = dev->flags; 3328 udev.dv_state = dev->state; 3329 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 3330 return (error); 3331 } 3332 3333 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 3334 "system device tree"); 3335 3336 int 3337 bus_data_generation_check(int generation) 3338 { 3339 if (generation != bus_data_generation) 3340 return (1); 3341 3342 /* XXX generate optimised lists here? */ 3343 return (0); 3344 } 3345 3346 void 3347 bus_data_generation_update(void) 3348 { 3349 bus_data_generation++; 3350 } 3351