subr_bus.c revision 121082
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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/kern/subr_bus.c 121082 2003-10-14 06:22:07Z imp $"); 29 30#include "opt_bus.h" 31 32#include <sys/param.h> 33#include <sys/conf.h> 34#include <sys/filio.h> 35#include <sys/lock.h> 36#include <sys/kernel.h> 37#include <sys/kobj.h> 38#include <sys/malloc.h> 39#include <sys/module.h> 40#include <sys/mutex.h> 41#include <sys/poll.h> 42#include <sys/proc.h> 43#include <sys/condvar.h> 44#include <sys/queue.h> 45#include <machine/bus.h> 46#include <sys/rman.h> 47#include <sys/selinfo.h> 48#include <sys/signalvar.h> 49#include <sys/sysctl.h> 50#include <sys/systm.h> 51#include <sys/uio.h> 52#include <sys/bus.h> 53 54#include <machine/stdarg.h> 55 56#include <vm/uma.h> 57 58SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 59 60/* 61 * Used to attach drivers to devclasses. 62 */ 63typedef struct driverlink *driverlink_t; 64struct driverlink { 65 driver_t *driver; 66 TAILQ_ENTRY(driverlink) link; /* list of drivers in devclass */ 67}; 68 69/* 70 * Forward declarations 71 */ 72typedef TAILQ_HEAD(devclass_list, devclass) devclass_list_t; 73typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t; 74typedef TAILQ_HEAD(device_list, device) device_list_t; 75 76struct devclass { 77 TAILQ_ENTRY(devclass) link; 78 driver_list_t drivers; /* bus devclasses store drivers for bus */ 79 char *name; 80 device_t *devices; /* array of devices indexed by unit */ 81 int maxunit; /* size of devices array */ 82}; 83 84/* 85 * Implementation of device. 86 */ 87struct device { 88 /* 89 * A device is a kernel object. The first field must be the 90 * current ops table for the object. 91 */ 92 KOBJ_FIELDS; 93 94 /* 95 * Device hierarchy. 96 */ 97 TAILQ_ENTRY(device) link; /* list of devices in parent */ 98 TAILQ_ENTRY(device) devlink; /* global device list membership */ 99 device_t parent; 100 device_list_t children; /* list of subordinate devices */ 101 102 /* 103 * Details of this device. 104 */ 105 driver_t *driver; 106 devclass_t devclass; /* device class which we are in */ 107 int unit; 108 char* nameunit; /* name+unit e.g. foodev0 */ 109 char* desc; /* driver specific description */ 110 int busy; /* count of calls to device_busy() */ 111 device_state_t state; 112 u_int32_t devflags; /* api level flags for device_get_flags() */ 113 u_short flags; 114#define DF_ENABLED 1 /* device should be probed/attached */ 115#define DF_FIXEDCLASS 2 /* devclass specified at create time */ 116#define DF_WILDCARD 4 /* unit was originally wildcard */ 117#define DF_DESCMALLOCED 8 /* description was malloced */ 118#define DF_QUIET 16 /* don't print verbose attach message */ 119#define DF_DONENOMATCH 32 /* don't execute DEVICE_NOMATCH again */ 120#define DF_EXTERNALSOFTC 64 /* softc not allocated by us */ 121 u_char order; /* order from device_add_child_ordered() */ 122 u_char pad; 123 void *ivars; 124 void *softc; 125}; 126 127struct device_op_desc { 128 unsigned int offset; /* offset in driver ops */ 129 struct method* method; /* internal method implementation */ 130 devop_t deflt; /* default implementation */ 131 const char* name; /* unique name (for registration) */ 132}; 133 134static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 135static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc"); 136 137#ifdef BUS_DEBUG 138 139static int bus_debug = 1; 140TUNABLE_INT("bus.debug", &bus_debug); 141SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0, 142 "Debug bus code"); 143 144#define PDEBUG(a) if (bus_debug) {printf("%s:%d: ", __func__, __LINE__), printf a; printf("\n");} 145#define DEVICENAME(d) ((d)? device_get_name(d): "no device") 146#define DRIVERNAME(d) ((d)? d->name : "no driver") 147#define DEVCLANAME(d) ((d)? d->name : "no devclass") 148 149/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 150 * prevent syslog from deleting initial spaces 151 */ 152#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while (0) 153 154static void print_device_short(device_t dev, int indent); 155static void print_device(device_t dev, int indent); 156void print_device_tree_short(device_t dev, int indent); 157void print_device_tree(device_t dev, int indent); 158static void print_driver_short(driver_t *driver, int indent); 159static void print_driver(driver_t *driver, int indent); 160static void print_driver_list(driver_list_t drivers, int indent); 161static void print_devclass_short(devclass_t dc, int indent); 162static void print_devclass(devclass_t dc, int indent); 163void print_devclass_list_short(void); 164void print_devclass_list(void); 165 166#else 167/* Make the compiler ignore the function calls */ 168#define PDEBUG(a) /* nop */ 169#define DEVICENAME(d) /* nop */ 170#define DRIVERNAME(d) /* nop */ 171#define DEVCLANAME(d) /* nop */ 172 173#define print_device_short(d,i) /* nop */ 174#define print_device(d,i) /* nop */ 175#define print_device_tree_short(d,i) /* nop */ 176#define print_device_tree(d,i) /* nop */ 177#define print_driver_short(d,i) /* nop */ 178#define print_driver(d,i) /* nop */ 179#define print_driver_list(d,i) /* nop */ 180#define print_devclass_short(d,i) /* nop */ 181#define print_devclass(d,i) /* nop */ 182#define print_devclass_list_short() /* nop */ 183#define print_devclass_list() /* nop */ 184#endif 185 186/* 187 * /dev/devctl implementation 188 */ 189 190/* 191 * This design allows only one reader for /dev/devctl. This is not desirable 192 * in the long run, but will get a lot of hair out of this implementation. 193 * Maybe we should make this device a clonable device. 194 * 195 * Also note: we specifically do not attach a device to the device_t tree 196 * to avoid potential chicken and egg problems. One could argue that all 197 * of this belongs to the root node. One could also further argue that the 198 * sysctl interface that we have not might more properly be an ioctl 199 * interface, but at this stage of the game, I'm not inclined to rock that 200 * boat. 201 * 202 * I'm also not sure that the SIGIO support is done correctly or not, as 203 * I copied it from a driver that had SIGIO support that likely hasn't been 204 * tested since 3.4 or 2.2.8! 205 */ 206 207static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 208static int devctl_disable = 0; 209TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 210SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, 211 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_devctl_disable, 212 "I", "devctl disable"); 213 214static d_open_t devopen; 215static d_close_t devclose; 216static d_read_t devread; 217static d_ioctl_t devioctl; 218static d_poll_t devpoll; 219 220#define CDEV_MAJOR 173 221static struct cdevsw dev_cdevsw = { 222 .d_open = devopen, 223 .d_close = devclose, 224 .d_read = devread, 225 .d_ioctl = devioctl, 226 .d_poll = devpoll, 227 .d_name = "devctl", 228 .d_maj = CDEV_MAJOR, 229}; 230 231struct dev_event_info 232{ 233 char *dei_data; 234 TAILQ_ENTRY(dev_event_info) dei_link; 235}; 236 237TAILQ_HEAD(devq, dev_event_info); 238 239static struct dev_softc 240{ 241 int inuse; 242 int nonblock; 243 struct mtx mtx; 244 struct cv cv; 245 struct selinfo sel; 246 struct devq devq; 247 struct proc *async_proc; 248} devsoftc; 249 250static dev_t devctl_dev; 251 252static void 253devinit(void) 254{ 255 devctl_dev = make_dev(&dev_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, 256 "devctl"); 257 mtx_init(&devsoftc.mtx, "dev mtx", "devd", MTX_DEF); 258 cv_init(&devsoftc.cv, "dev cv"); 259 TAILQ_INIT(&devsoftc.devq); 260} 261 262static int 263devopen(dev_t dev, int oflags, int devtype, d_thread_t *td) 264{ 265 if (devsoftc.inuse) 266 return (EBUSY); 267 /* move to init */ 268 devsoftc.inuse = 1; 269 devsoftc.nonblock = 0; 270 devsoftc.async_proc = NULL; 271 return (0); 272} 273 274static int 275devclose(dev_t dev, int fflag, int devtype, d_thread_t *td) 276{ 277 devsoftc.inuse = 0; 278 mtx_lock(&devsoftc.mtx); 279 cv_broadcast(&devsoftc.cv); 280 mtx_unlock(&devsoftc.mtx); 281 282 return (0); 283} 284 285/* 286 * The read channel for this device is used to report changes to 287 * userland in realtime. We are required to free the data as well as 288 * the n1 object because we allocate them separately. Also note that 289 * we return one record at a time. If you try to read this device a 290 * character at a time, you will loose the rest of the data. Listening 291 * programs are expected to cope. 292 */ 293static int 294devread(dev_t dev, struct uio *uio, int ioflag) 295{ 296 struct dev_event_info *n1; 297 int rv; 298 299 mtx_lock(&devsoftc.mtx); 300 while (TAILQ_EMPTY(&devsoftc.devq)) { 301 if (devsoftc.nonblock) { 302 mtx_unlock(&devsoftc.mtx); 303 return (EAGAIN); 304 } 305 rv = cv_wait_sig(&devsoftc.cv, &devsoftc.mtx); 306 if (rv) { 307 /* 308 * Need to translate ERESTART to EINTR here? -- jake 309 */ 310 mtx_unlock(&devsoftc.mtx); 311 return (rv); 312 } 313 } 314 n1 = TAILQ_FIRST(&devsoftc.devq); 315 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 316 mtx_unlock(&devsoftc.mtx); 317 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 318 free(n1->dei_data, M_BUS); 319 free(n1, M_BUS); 320 return (rv); 321} 322 323static int 324devioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, d_thread_t *td) 325{ 326 switch (cmd) { 327 328 case FIONBIO: 329 if (*(int*)data) 330 devsoftc.nonblock = 1; 331 else 332 devsoftc.nonblock = 0; 333 return (0); 334 case FIOASYNC: 335 if (*(int*)data) 336 devsoftc.async_proc = td->td_proc; 337 else 338 devsoftc.async_proc = NULL; 339 return (0); 340 341 /* (un)Support for other fcntl() calls. */ 342 case FIOCLEX: 343 case FIONCLEX: 344 case FIONREAD: 345 case FIOSETOWN: 346 case FIOGETOWN: 347 default: 348 break; 349 } 350 return (ENOTTY); 351} 352 353static int 354devpoll(dev_t dev, int events, d_thread_t *td) 355{ 356 int revents = 0; 357 358 mtx_lock(&devsoftc.mtx); 359 if (events & (POLLIN | POLLRDNORM)) { 360 if (!TAILQ_EMPTY(&devsoftc.devq)) 361 revents = events & (POLLIN | POLLRDNORM); 362 else 363 selrecord(td, &devsoftc.sel); 364 } 365 mtx_unlock(&devsoftc.mtx); 366 367 return (revents); 368} 369 370/* 371 * Common routine that tries to make sending messages as easy as possible. 372 * We allocate memory for the data, copy strings into that, but do not 373 * free it unless there's an error. The dequeue part of the driver should 374 * free the data. We don't send data when the device is disabled. We do 375 * send data, even when we have no listeners, because we wish to avoid 376 * races relating to startup and restart of listening applications. 377 */ 378static void 379devaddq(const char *type, const char *what, device_t dev) 380{ 381 struct dev_event_info *n1 = NULL; 382 struct proc *p; 383 char *data = NULL; 384 char *loc; 385 const char *parstr; 386 387 if (devctl_disable) 388 return; 389 n1 = malloc(sizeof(*n1), M_BUS, M_NOWAIT); 390 if (n1 == NULL) 391 goto bad; 392 data = malloc(1024, M_BUS, M_NOWAIT); 393 if (data == NULL) 394 goto bad; 395 loc = malloc(1024, M_BUS, M_NOWAIT); 396 if (loc == NULL) 397 goto bad; 398 *loc = '\0'; 399 bus_child_location_str(dev, loc, 1024); 400 if (device_get_parent(dev) == NULL) 401 parstr = "."; /* Or '/' ? */ 402 else 403 parstr = device_get_nameunit(device_get_parent(dev)); 404 snprintf(data, 1024, "%s%s at %s on %s\n", type, what, loc, parstr); 405 free(loc, M_BUS); 406 n1->dei_data = data; 407 mtx_lock(&devsoftc.mtx); 408 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 409 cv_broadcast(&devsoftc.cv); 410 mtx_unlock(&devsoftc.mtx); 411 selwakeup(&devsoftc.sel); 412 p = devsoftc.async_proc; 413 if (p != NULL) { 414 PROC_LOCK(p); 415 psignal(p, SIGIO); 416 PROC_UNLOCK(p); 417 } 418 return; 419bad:; 420 free(data, M_BUS); 421 free(n1, M_BUS); 422 return; 423} 424 425/* 426 * A device was added to the tree. We are called just after it successfully 427 * attaches (that is, probe and attach success for this device). No call 428 * is made if a device is merely parented into the tree. See devnomatch 429 * if probe fails. If attach fails, no notification is sent (but maybe 430 * we should have a different message for this). 431 */ 432static void 433devadded(device_t dev) 434{ 435 devaddq("+", device_get_nameunit(dev), dev); 436} 437 438/* 439 * A device was removed from the tree. We are called just before this 440 * happens. 441 */ 442static void 443devremoved(device_t dev) 444{ 445 devaddq("-", device_get_nameunit(dev), dev); 446} 447 448/* 449 * Called when there's no match for this device. This is only called 450 * the first time that no match happens, so we don't keep getitng this 451 * message. Should that prove to be undesirable, we can change it. 452 * This is called when all drivers that can attach to a given bus 453 * decline to accept this device. Other errrors may not be detected. 454 */ 455static void 456devnomatch(device_t dev) 457{ 458 char *pnp = NULL; 459 460 pnp = malloc(1024, M_BUS, M_NOWAIT); 461 if (pnp == NULL) 462 return; 463 *pnp = '\0'; 464 bus_child_pnpinfo_str(dev, pnp, 1024); 465 devaddq("?", pnp, dev); 466 free(pnp, M_BUS); 467 return; 468} 469 470static int 471sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 472{ 473 struct dev_event_info *n1; 474 int dis, error; 475 476 dis = devctl_disable; 477 error = sysctl_handle_int(oidp, &dis, 0, req); 478 if (error || !req->newptr) 479 return (error); 480 mtx_lock(&devsoftc.mtx); 481 devctl_disable = dis; 482 if (dis) { 483 while (!TAILQ_EMPTY(&devsoftc.devq)) { 484 n1 = TAILQ_FIRST(&devsoftc.devq); 485 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 486 free(n1->dei_data, M_BUS); 487 free(n1, M_BUS); 488 } 489 } 490 mtx_unlock(&devsoftc.mtx); 491 return (0); 492} 493 494/* End of /dev/devctl code */ 495 496TAILQ_HEAD(,device) bus_data_devices; 497static int bus_data_generation = 1; 498 499kobj_method_t null_methods[] = { 500 { 0, 0 } 501}; 502 503DEFINE_CLASS(null, null_methods, 0); 504 505/* 506 * Devclass implementation 507 */ 508 509static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 510 511static devclass_t 512devclass_find_internal(const char *classname, int create) 513{ 514 devclass_t dc; 515 516 PDEBUG(("looking for %s", classname)); 517 if (!classname) 518 return (NULL); 519 520 TAILQ_FOREACH(dc, &devclasses, link) { 521 if (!strcmp(dc->name, classname)) 522 return (dc); 523 } 524 525 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 526 if (create) { 527 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 528 M_BUS, M_NOWAIT|M_ZERO); 529 if (!dc) 530 return (NULL); 531 dc->name = (char*) (dc + 1); 532 strcpy(dc->name, classname); 533 TAILQ_INIT(&dc->drivers); 534 TAILQ_INSERT_TAIL(&devclasses, dc, link); 535 536 bus_data_generation_update(); 537 } 538 539 return (dc); 540} 541 542devclass_t 543devclass_create(const char *classname) 544{ 545 return (devclass_find_internal(classname, TRUE)); 546} 547 548devclass_t 549devclass_find(const char *classname) 550{ 551 return (devclass_find_internal(classname, FALSE)); 552} 553 554int 555devclass_add_driver(devclass_t dc, driver_t *driver) 556{ 557 driverlink_t dl; 558 int i; 559 560 PDEBUG(("%s", DRIVERNAME(driver))); 561 562 dl = malloc(sizeof *dl, M_BUS, M_NOWAIT|M_ZERO); 563 if (!dl) 564 return (ENOMEM); 565 566 /* 567 * Compile the driver's methods. Also increase the reference count 568 * so that the class doesn't get freed when the last instance 569 * goes. This means we can safely use static methods and avoids a 570 * double-free in devclass_delete_driver. 571 */ 572 kobj_class_compile((kobj_class_t) driver); 573 574 /* 575 * Make sure the devclass which the driver is implementing exists. 576 */ 577 devclass_find_internal(driver->name, TRUE); 578 579 dl->driver = driver; 580 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 581 driver->refs++; 582 583 /* 584 * Call BUS_DRIVER_ADDED for any existing busses in this class. 585 */ 586 for (i = 0; i < dc->maxunit; i++) 587 if (dc->devices[i]) 588 BUS_DRIVER_ADDED(dc->devices[i], driver); 589 590 bus_data_generation_update(); 591 return (0); 592} 593 594int 595devclass_delete_driver(devclass_t busclass, driver_t *driver) 596{ 597 devclass_t dc = devclass_find(driver->name); 598 driverlink_t dl; 599 device_t dev; 600 int i; 601 int error; 602 603 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 604 605 if (!dc) 606 return (0); 607 608 /* 609 * Find the link structure in the bus' list of drivers. 610 */ 611 TAILQ_FOREACH(dl, &busclass->drivers, link) { 612 if (dl->driver == driver) 613 break; 614 } 615 616 if (!dl) { 617 PDEBUG(("%s not found in %s list", driver->name, 618 busclass->name)); 619 return (ENOENT); 620 } 621 622 /* 623 * Disassociate from any devices. We iterate through all the 624 * devices in the devclass of the driver and detach any which are 625 * using the driver and which have a parent in the devclass which 626 * we are deleting from. 627 * 628 * Note that since a driver can be in multiple devclasses, we 629 * should not detach devices which are not children of devices in 630 * the affected devclass. 631 */ 632 for (i = 0; i < dc->maxunit; i++) { 633 if (dc->devices[i]) { 634 dev = dc->devices[i]; 635 if (dev->driver == driver && dev->parent && 636 dev->parent->devclass == busclass) { 637 if ((error = device_detach(dev)) != 0) 638 return (error); 639 device_set_driver(dev, NULL); 640 } 641 } 642 } 643 644 TAILQ_REMOVE(&busclass->drivers, dl, link); 645 free(dl, M_BUS); 646 647 driver->refs--; 648 if (driver->refs == 0) 649 kobj_class_free((kobj_class_t) driver); 650 651 bus_data_generation_update(); 652 return (0); 653} 654 655static driverlink_t 656devclass_find_driver_internal(devclass_t dc, const char *classname) 657{ 658 driverlink_t dl; 659 660 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 661 662 TAILQ_FOREACH(dl, &dc->drivers, link) { 663 if (!strcmp(dl->driver->name, classname)) 664 return (dl); 665 } 666 667 PDEBUG(("not found")); 668 return (NULL); 669} 670 671driver_t * 672devclass_find_driver(devclass_t dc, const char *classname) 673{ 674 driverlink_t dl; 675 676 dl = devclass_find_driver_internal(dc, classname); 677 if (dl) 678 return (dl->driver); 679 return (NULL); 680} 681 682const char * 683devclass_get_name(devclass_t dc) 684{ 685 return (dc->name); 686} 687 688device_t 689devclass_get_device(devclass_t dc, int unit) 690{ 691 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 692 return (NULL); 693 return (dc->devices[unit]); 694} 695 696void * 697devclass_get_softc(devclass_t dc, int unit) 698{ 699 device_t dev; 700 701 dev = devclass_get_device(dc, unit); 702 if (!dev) 703 return (NULL); 704 705 return (device_get_softc(dev)); 706} 707 708int 709devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 710{ 711 int i; 712 int count; 713 device_t *list; 714 715 count = 0; 716 for (i = 0; i < dc->maxunit; i++) 717 if (dc->devices[i]) 718 count++; 719 720 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO); 721 if (!list) 722 return (ENOMEM); 723 724 count = 0; 725 for (i = 0; i < dc->maxunit; i++) { 726 if (dc->devices[i]) { 727 list[count] = dc->devices[i]; 728 count++; 729 } 730 } 731 732 *devlistp = list; 733 *devcountp = count; 734 735 return (0); 736} 737 738int 739devclass_get_maxunit(devclass_t dc) 740{ 741 return (dc->maxunit); 742} 743 744int 745devclass_find_free_unit(devclass_t dc, int unit) 746{ 747 if (dc == NULL) 748 return (unit); 749 while (unit < dc->maxunit && dc->devices[unit] != NULL) 750 unit++; 751 return (unit); 752} 753 754static int 755devclass_alloc_unit(devclass_t dc, int *unitp) 756{ 757 int unit = *unitp; 758 759 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 760 761 /* If we were given a wired unit number, check for existing device */ 762 /* XXX imp XXX */ 763 if (unit != -1) { 764 if (unit >= 0 && unit < dc->maxunit && 765 dc->devices[unit] != NULL) { 766 if (bootverbose) 767 printf("%s: %s%d already exists; skipping it\n", 768 dc->name, dc->name, *unitp); 769 return (EEXIST); 770 } 771 } else { 772 /* Unwired device, find the next available slot for it */ 773 unit = 0; 774 while (unit < dc->maxunit && dc->devices[unit] != NULL) 775 unit++; 776 } 777 778 /* 779 * We've selected a unit beyond the length of the table, so let's 780 * extend the table to make room for all units up to and including 781 * this one. 782 */ 783 if (unit >= dc->maxunit) { 784 device_t *newlist; 785 int newsize; 786 787 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 788 newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT); 789 if (!newlist) 790 return (ENOMEM); 791 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 792 bzero(newlist + dc->maxunit, 793 sizeof(device_t) * (newsize - dc->maxunit)); 794 if (dc->devices) 795 free(dc->devices, M_BUS); 796 dc->devices = newlist; 797 dc->maxunit = newsize; 798 } 799 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 800 801 *unitp = unit; 802 return (0); 803} 804 805static int 806devclass_add_device(devclass_t dc, device_t dev) 807{ 808 int buflen, error; 809 810 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 811 812 buflen = snprintf(NULL, 0, "%s%d$", dc->name, dev->unit); 813 if (buflen < 0) 814 return (ENOMEM); 815 dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT|M_ZERO); 816 if (!dev->nameunit) 817 return (ENOMEM); 818 819 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 820 free(dev->nameunit, M_BUS); 821 dev->nameunit = NULL; 822 return (error); 823 } 824 dc->devices[dev->unit] = dev; 825 dev->devclass = dc; 826 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 827 828 return (0); 829} 830 831static int 832devclass_delete_device(devclass_t dc, device_t dev) 833{ 834 if (!dc || !dev) 835 return (0); 836 837 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 838 839 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 840 panic("devclass_delete_device: inconsistent device class"); 841 dc->devices[dev->unit] = NULL; 842 if (dev->flags & DF_WILDCARD) 843 dev->unit = -1; 844 dev->devclass = NULL; 845 free(dev->nameunit, M_BUS); 846 dev->nameunit = NULL; 847 848 return (0); 849} 850 851static device_t 852make_device(device_t parent, const char *name, int unit) 853{ 854 device_t dev; 855 devclass_t dc; 856 857 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 858 859 if (name) { 860 dc = devclass_find_internal(name, TRUE); 861 if (!dc) { 862 printf("make_device: can't find device class %s\n", 863 name); 864 return (NULL); 865 } 866 } else { 867 dc = NULL; 868 } 869 870 dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT|M_ZERO); 871 if (!dev) 872 return (NULL); 873 874 dev->parent = parent; 875 TAILQ_INIT(&dev->children); 876 kobj_init((kobj_t) dev, &null_class); 877 dev->driver = NULL; 878 dev->devclass = NULL; 879 dev->unit = unit; 880 dev->nameunit = NULL; 881 dev->desc = NULL; 882 dev->busy = 0; 883 dev->devflags = 0; 884 dev->flags = DF_ENABLED; 885 dev->order = 0; 886 if (unit == -1) 887 dev->flags |= DF_WILDCARD; 888 if (name) { 889 dev->flags |= DF_FIXEDCLASS; 890 if (devclass_add_device(dc, dev)) { 891 kobj_delete((kobj_t) dev, M_BUS); 892 return (NULL); 893 } 894 } 895 dev->ivars = NULL; 896 dev->softc = NULL; 897 898 dev->state = DS_NOTPRESENT; 899 900 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 901 bus_data_generation_update(); 902 903 return (dev); 904} 905 906static int 907device_print_child(device_t dev, device_t child) 908{ 909 int retval = 0; 910 911 if (device_is_alive(child)) 912 retval += BUS_PRINT_CHILD(dev, child); 913 else 914 retval += device_printf(child, " not found\n"); 915 916 return (retval); 917} 918 919device_t 920device_add_child(device_t dev, const char *name, int unit) 921{ 922 return (device_add_child_ordered(dev, 0, name, unit)); 923} 924 925device_t 926device_add_child_ordered(device_t dev, int order, const char *name, int unit) 927{ 928 device_t child; 929 device_t place; 930 931 PDEBUG(("%s at %s with order %d as unit %d", 932 name, DEVICENAME(dev), order, unit)); 933 934 child = make_device(dev, name, unit); 935 if (child == NULL) 936 return (child); 937 child->order = order; 938 939 TAILQ_FOREACH(place, &dev->children, link) { 940 if (place->order > order) 941 break; 942 } 943 944 if (place) { 945 /* 946 * The device 'place' is the first device whose order is 947 * greater than the new child. 948 */ 949 TAILQ_INSERT_BEFORE(place, child, link); 950 } else { 951 /* 952 * The new child's order is greater or equal to the order of 953 * any existing device. Add the child to the tail of the list. 954 */ 955 TAILQ_INSERT_TAIL(&dev->children, child, link); 956 } 957 958 bus_data_generation_update(); 959 return (child); 960} 961 962int 963device_delete_child(device_t dev, device_t child) 964{ 965 int error; 966 device_t grandchild; 967 968 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 969 970 /* remove children first */ 971 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 972 error = device_delete_child(child, grandchild); 973 if (error) 974 return (error); 975 } 976 977 if ((error = device_detach(child)) != 0) 978 return (error); 979 if (child->devclass) 980 devclass_delete_device(child->devclass, child); 981 TAILQ_REMOVE(&dev->children, child, link); 982 TAILQ_REMOVE(&bus_data_devices, child, devlink); 983 device_set_desc(child, NULL); 984 kobj_delete((kobj_t) child, M_BUS); 985 986 bus_data_generation_update(); 987 return (0); 988} 989 990/* 991 * Find only devices attached to this bus. 992 */ 993device_t 994device_find_child(device_t dev, const char *classname, int unit) 995{ 996 devclass_t dc; 997 device_t child; 998 999 dc = devclass_find(classname); 1000 if (!dc) 1001 return (NULL); 1002 1003 child = devclass_get_device(dc, unit); 1004 if (child && child->parent == dev) 1005 return (child); 1006 return (NULL); 1007} 1008 1009static driverlink_t 1010first_matching_driver(devclass_t dc, device_t dev) 1011{ 1012 if (dev->devclass) 1013 return (devclass_find_driver_internal(dc, dev->devclass->name)); 1014 return (TAILQ_FIRST(&dc->drivers)); 1015} 1016 1017static driverlink_t 1018next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1019{ 1020 if (dev->devclass) { 1021 driverlink_t dl; 1022 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1023 if (!strcmp(dev->devclass->name, dl->driver->name)) 1024 return (dl); 1025 return (NULL); 1026 } 1027 return (TAILQ_NEXT(last, link)); 1028} 1029 1030static int 1031device_probe_child(device_t dev, device_t child) 1032{ 1033 devclass_t dc; 1034 driverlink_t best = 0; 1035 driverlink_t dl; 1036 int result, pri = 0; 1037 int hasclass = (child->devclass != 0); 1038 1039 dc = dev->devclass; 1040 if (!dc) 1041 panic("device_probe_child: parent device has no devclass"); 1042 1043 if (child->state == DS_ALIVE) 1044 return (0); 1045 1046 for (dl = first_matching_driver(dc, child); 1047 dl; 1048 dl = next_matching_driver(dc, child, dl)) { 1049 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1050 device_set_driver(child, dl->driver); 1051 if (!hasclass) 1052 device_set_devclass(child, dl->driver->name); 1053 result = DEVICE_PROBE(child); 1054 if (!hasclass) 1055 device_set_devclass(child, 0); 1056 1057 /* 1058 * If the driver returns SUCCESS, there can be no higher match 1059 * for this device. 1060 */ 1061 if (result == 0) { 1062 best = dl; 1063 pri = 0; 1064 break; 1065 } 1066 1067 /* 1068 * The driver returned an error so it certainly doesn't match. 1069 */ 1070 if (result > 0) { 1071 device_set_driver(child, 0); 1072 continue; 1073 } 1074 1075 /* 1076 * A priority lower than SUCCESS, remember the best matching 1077 * driver. Initialise the value of pri for the first match. 1078 */ 1079 if (best == 0 || result > pri) { 1080 best = dl; 1081 pri = result; 1082 continue; 1083 } 1084 } 1085 1086 /* 1087 * If we found a driver, change state and initialise the devclass. 1088 */ 1089 if (best) { 1090 if (!child->devclass) 1091 device_set_devclass(child, best->driver->name); 1092 device_set_driver(child, best->driver); 1093 if (pri < 0) { 1094 /* 1095 * A bit bogus. Call the probe method again to make 1096 * sure that we have the right description. 1097 */ 1098 DEVICE_PROBE(child); 1099 } 1100 child->state = DS_ALIVE; 1101 1102 bus_data_generation_update(); 1103 return (0); 1104 } 1105 1106 return (ENXIO); 1107} 1108 1109device_t 1110device_get_parent(device_t dev) 1111{ 1112 return (dev->parent); 1113} 1114 1115int 1116device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1117{ 1118 int count; 1119 device_t child; 1120 device_t *list; 1121 1122 count = 0; 1123 TAILQ_FOREACH(child, &dev->children, link) { 1124 count++; 1125 } 1126 1127 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO); 1128 if (!list) 1129 return (ENOMEM); 1130 1131 count = 0; 1132 TAILQ_FOREACH(child, &dev->children, link) { 1133 list[count] = child; 1134 count++; 1135 } 1136 1137 *devlistp = list; 1138 *devcountp = count; 1139 1140 return (0); 1141} 1142 1143driver_t * 1144device_get_driver(device_t dev) 1145{ 1146 return (dev->driver); 1147} 1148 1149devclass_t 1150device_get_devclass(device_t dev) 1151{ 1152 return (dev->devclass); 1153} 1154 1155const char * 1156device_get_name(device_t dev) 1157{ 1158 if (dev != NULL && dev->devclass) 1159 return (devclass_get_name(dev->devclass)); 1160 return (NULL); 1161} 1162 1163const char * 1164device_get_nameunit(device_t dev) 1165{ 1166 return (dev->nameunit); 1167} 1168 1169int 1170device_get_unit(device_t dev) 1171{ 1172 return (dev->unit); 1173} 1174 1175const char * 1176device_get_desc(device_t dev) 1177{ 1178 return (dev->desc); 1179} 1180 1181u_int32_t 1182device_get_flags(device_t dev) 1183{ 1184 return (dev->devflags); 1185} 1186 1187int 1188device_print_prettyname(device_t dev) 1189{ 1190 const char *name = device_get_name(dev); 1191 1192 if (name == 0) 1193 return (printf("unknown: ")); 1194 return (printf("%s%d: ", name, device_get_unit(dev))); 1195} 1196 1197int 1198device_printf(device_t dev, const char * fmt, ...) 1199{ 1200 va_list ap; 1201 int retval; 1202 1203 retval = device_print_prettyname(dev); 1204 va_start(ap, fmt); 1205 retval += vprintf(fmt, ap); 1206 va_end(ap); 1207 return (retval); 1208} 1209 1210static void 1211device_set_desc_internal(device_t dev, const char* desc, int copy) 1212{ 1213 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1214 free(dev->desc, M_BUS); 1215 dev->flags &= ~DF_DESCMALLOCED; 1216 dev->desc = NULL; 1217 } 1218 1219 if (copy && desc) { 1220 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT); 1221 if (dev->desc) { 1222 strcpy(dev->desc, desc); 1223 dev->flags |= DF_DESCMALLOCED; 1224 } 1225 } else { 1226 /* Avoid a -Wcast-qual warning */ 1227 dev->desc = (char *)(uintptr_t) desc; 1228 } 1229 1230 bus_data_generation_update(); 1231} 1232 1233void 1234device_set_desc(device_t dev, const char* desc) 1235{ 1236 device_set_desc_internal(dev, desc, FALSE); 1237} 1238 1239void 1240device_set_desc_copy(device_t dev, const char* desc) 1241{ 1242 device_set_desc_internal(dev, desc, TRUE); 1243} 1244 1245void 1246device_set_flags(device_t dev, u_int32_t flags) 1247{ 1248 dev->devflags = flags; 1249} 1250 1251void * 1252device_get_softc(device_t dev) 1253{ 1254 return (dev->softc); 1255} 1256 1257void 1258device_set_softc(device_t dev, void *softc) 1259{ 1260 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1261 free(dev->softc, M_BUS_SC); 1262 dev->softc = softc; 1263 if (dev->softc) 1264 dev->flags |= DF_EXTERNALSOFTC; 1265 else 1266 dev->flags &= ~DF_EXTERNALSOFTC; 1267} 1268 1269void * 1270device_get_ivars(device_t dev) 1271{ 1272 1273 KASSERT(dev != NULL, ("device_get_ivars(NULL, ...)")); 1274 return (dev->ivars); 1275} 1276 1277void 1278device_set_ivars(device_t dev, void * ivars) 1279{ 1280 1281 KASSERT(dev != NULL, ("device_set_ivars(NULL, ...)")); 1282 dev->ivars = ivars; 1283} 1284 1285device_state_t 1286device_get_state(device_t dev) 1287{ 1288 return (dev->state); 1289} 1290 1291void 1292device_enable(device_t dev) 1293{ 1294 dev->flags |= DF_ENABLED; 1295} 1296 1297void 1298device_disable(device_t dev) 1299{ 1300 dev->flags &= ~DF_ENABLED; 1301} 1302 1303void 1304device_busy(device_t dev) 1305{ 1306 if (dev->state < DS_ATTACHED) 1307 panic("device_busy: called for unattached device"); 1308 if (dev->busy == 0 && dev->parent) 1309 device_busy(dev->parent); 1310 dev->busy++; 1311 dev->state = DS_BUSY; 1312} 1313 1314void 1315device_unbusy(device_t dev) 1316{ 1317 if (dev->state != DS_BUSY) 1318 panic("device_unbusy: called for non-busy device"); 1319 dev->busy--; 1320 if (dev->busy == 0) { 1321 if (dev->parent) 1322 device_unbusy(dev->parent); 1323 dev->state = DS_ATTACHED; 1324 } 1325} 1326 1327void 1328device_quiet(device_t dev) 1329{ 1330 dev->flags |= DF_QUIET; 1331} 1332 1333void 1334device_verbose(device_t dev) 1335{ 1336 dev->flags &= ~DF_QUIET; 1337} 1338 1339int 1340device_is_quiet(device_t dev) 1341{ 1342 return ((dev->flags & DF_QUIET) != 0); 1343} 1344 1345int 1346device_is_enabled(device_t dev) 1347{ 1348 return ((dev->flags & DF_ENABLED) != 0); 1349} 1350 1351int 1352device_is_alive(device_t dev) 1353{ 1354 return (dev->state >= DS_ALIVE); 1355} 1356 1357int 1358device_is_attached(device_t dev) 1359{ 1360 return (dev->state >= DS_ATTACHED); 1361} 1362 1363int 1364device_set_devclass(device_t dev, const char *classname) 1365{ 1366 devclass_t dc; 1367 int error; 1368 1369 if (!classname) { 1370 if (dev->devclass) 1371 devclass_delete_device(dev->devclass, dev); 1372 return (0); 1373 } 1374 1375 if (dev->devclass) { 1376 printf("device_set_devclass: device class already set\n"); 1377 return (EINVAL); 1378 } 1379 1380 dc = devclass_find_internal(classname, TRUE); 1381 if (!dc) 1382 return (ENOMEM); 1383 1384 error = devclass_add_device(dc, dev); 1385 1386 bus_data_generation_update(); 1387 return (error); 1388} 1389 1390int 1391device_set_driver(device_t dev, driver_t *driver) 1392{ 1393 if (dev->state >= DS_ATTACHED) 1394 return (EBUSY); 1395 1396 if (dev->driver == driver) 1397 return (0); 1398 1399 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1400 free(dev->softc, M_BUS_SC); 1401 dev->softc = NULL; 1402 } 1403 kobj_delete((kobj_t) dev, 0); 1404 dev->driver = driver; 1405 if (driver) { 1406 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1407 if (!(dev->flags & DF_EXTERNALSOFTC) && driver->size > 0) { 1408 dev->softc = malloc(driver->size, M_BUS_SC, 1409 M_NOWAIT | M_ZERO); 1410 if (!dev->softc) { 1411 kobj_delete((kobj_t) dev, 0); 1412 kobj_init((kobj_t) dev, &null_class); 1413 dev->driver = NULL; 1414 return (ENOMEM); 1415 } 1416 } 1417 } else { 1418 kobj_init((kobj_t) dev, &null_class); 1419 } 1420 1421 bus_data_generation_update(); 1422 return (0); 1423} 1424 1425int 1426device_probe_and_attach(device_t dev) 1427{ 1428 device_t bus = dev->parent; 1429 int error = 0; 1430 int hasclass = (dev->devclass != 0); 1431 1432 if (dev->state >= DS_ALIVE) 1433 return (0); 1434 1435 if (dev->flags & DF_ENABLED) { 1436 error = device_probe_child(bus, dev); 1437 if (!error) { 1438 if (!device_is_quiet(dev)) 1439 device_print_child(bus, dev); 1440 error = DEVICE_ATTACH(dev); 1441 if (!error) { 1442 dev->state = DS_ATTACHED; 1443 devadded(dev); 1444 } else { 1445 printf("device_probe_and_attach: %s%d attach returned %d\n", 1446 dev->driver->name, dev->unit, error); 1447 /* Unset the class; set in device_probe_child */ 1448 if (!hasclass) 1449 device_set_devclass(dev, 0); 1450 device_set_driver(dev, NULL); 1451 dev->state = DS_NOTPRESENT; 1452 } 1453 } else { 1454 if (!(dev->flags & DF_DONENOMATCH)) { 1455 BUS_PROBE_NOMATCH(bus, dev); 1456 devnomatch(dev); 1457 dev->flags |= DF_DONENOMATCH; 1458 } 1459 } 1460 } else { 1461 if (bootverbose) { 1462 device_print_prettyname(dev); 1463 printf("not probed (disabled)\n"); 1464 } 1465 } 1466 1467 return (error); 1468} 1469 1470int 1471device_detach(device_t dev) 1472{ 1473 int error; 1474 1475 PDEBUG(("%s", DEVICENAME(dev))); 1476 if (dev->state == DS_BUSY) 1477 return (EBUSY); 1478 if (dev->state != DS_ATTACHED) 1479 return (0); 1480 1481 if ((error = DEVICE_DETACH(dev)) != 0) 1482 return (error); 1483 devremoved(dev); 1484 device_printf(dev, "detached\n"); 1485 if (dev->parent) 1486 BUS_CHILD_DETACHED(dev->parent, dev); 1487 1488 if (!(dev->flags & DF_FIXEDCLASS)) 1489 devclass_delete_device(dev->devclass, dev); 1490 1491 dev->state = DS_NOTPRESENT; 1492 device_set_driver(dev, NULL); 1493 1494 return (0); 1495} 1496 1497int 1498device_shutdown(device_t dev) 1499{ 1500 if (dev->state < DS_ATTACHED) 1501 return (0); 1502 return (DEVICE_SHUTDOWN(dev)); 1503} 1504 1505int 1506device_set_unit(device_t dev, int unit) 1507{ 1508 devclass_t dc; 1509 int err; 1510 1511 dc = device_get_devclass(dev); 1512 if (unit < dc->maxunit && dc->devices[unit]) 1513 return (EBUSY); 1514 err = devclass_delete_device(dc, dev); 1515 if (err) 1516 return (err); 1517 dev->unit = unit; 1518 err = devclass_add_device(dc, dev); 1519 if (err) 1520 return (err); 1521 1522 bus_data_generation_update(); 1523 return (0); 1524} 1525 1526/*======================================*/ 1527/* 1528 * Some useful method implementations to make life easier for bus drivers. 1529 */ 1530 1531void 1532resource_list_init(struct resource_list *rl) 1533{ 1534 SLIST_INIT(rl); 1535} 1536 1537void 1538resource_list_free(struct resource_list *rl) 1539{ 1540 struct resource_list_entry *rle; 1541 1542 while ((rle = SLIST_FIRST(rl)) != NULL) { 1543 if (rle->res) 1544 panic("resource_list_free: resource entry is busy"); 1545 SLIST_REMOVE_HEAD(rl, link); 1546 free(rle, M_BUS); 1547 } 1548} 1549 1550int 1551resource_list_add_next(struct resource_list *rl, int type, u_long start, 1552 u_long end, u_long count) 1553{ 1554 int rid; 1555 1556 rid = 0; 1557 while (resource_list_find(rl, type, rid) != NULL) 1558 rid++; 1559 resource_list_add(rl, type, rid, start, end, count); 1560 return (rid); 1561} 1562 1563void 1564resource_list_add(struct resource_list *rl, int type, int rid, 1565 u_long start, u_long end, u_long count) 1566{ 1567 struct resource_list_entry *rle; 1568 1569 rle = resource_list_find(rl, type, rid); 1570 if (!rle) { 1571 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1572 M_NOWAIT); 1573 if (!rle) 1574 panic("resource_list_add: can't record entry"); 1575 SLIST_INSERT_HEAD(rl, rle, link); 1576 rle->type = type; 1577 rle->rid = rid; 1578 rle->res = NULL; 1579 } 1580 1581 if (rle->res) 1582 panic("resource_list_add: resource entry is busy"); 1583 1584 rle->start = start; 1585 rle->end = end; 1586 rle->count = count; 1587} 1588 1589struct resource_list_entry * 1590resource_list_find(struct resource_list *rl, int type, int rid) 1591{ 1592 struct resource_list_entry *rle; 1593 1594 SLIST_FOREACH(rle, rl, link) { 1595 if (rle->type == type && rle->rid == rid) 1596 return (rle); 1597 } 1598 return (NULL); 1599} 1600 1601void 1602resource_list_delete(struct resource_list *rl, int type, int rid) 1603{ 1604 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1605 1606 if (rle) { 1607 if (rle->res != NULL) 1608 panic("resource_list_delete: resource has not been released"); 1609 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1610 free(rle, M_BUS); 1611 } 1612} 1613 1614struct resource * 1615resource_list_alloc(struct resource_list *rl, device_t bus, device_t child, 1616 int type, int *rid, u_long start, u_long end, u_long count, u_int flags) 1617{ 1618 struct resource_list_entry *rle = 0; 1619 int passthrough = (device_get_parent(child) != bus); 1620 int isdefault = (start == 0UL && end == ~0UL); 1621 1622 if (passthrough) { 1623 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1624 type, rid, start, end, count, flags)); 1625 } 1626 1627 rle = resource_list_find(rl, type, *rid); 1628 1629 if (!rle) 1630 return (NULL); /* no resource of that type/rid */ 1631 1632 if (rle->res) 1633 panic("resource_list_alloc: resource entry is busy"); 1634 1635 if (isdefault) { 1636 start = rle->start; 1637 count = ulmax(count, rle->count); 1638 end = ulmax(rle->end, start + count - 1); 1639 } 1640 1641 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1642 type, rid, start, end, count, flags); 1643 1644 /* 1645 * Record the new range. 1646 */ 1647 if (rle->res) { 1648 rle->start = rman_get_start(rle->res); 1649 rle->end = rman_get_end(rle->res); 1650 rle->count = count; 1651 } 1652 1653 return (rle->res); 1654} 1655 1656int 1657resource_list_release(struct resource_list *rl, device_t bus, device_t child, 1658 int type, int rid, struct resource *res) 1659{ 1660 struct resource_list_entry *rle = 0; 1661 int passthrough = (device_get_parent(child) != bus); 1662 int error; 1663 1664 if (passthrough) { 1665 return (BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1666 type, rid, res)); 1667 } 1668 1669 rle = resource_list_find(rl, type, rid); 1670 1671 if (!rle) 1672 panic("resource_list_release: can't find resource"); 1673 if (!rle->res) 1674 panic("resource_list_release: resource entry is not busy"); 1675 1676 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1677 type, rid, res); 1678 if (error) 1679 return (error); 1680 1681 rle->res = NULL; 1682 return (0); 1683} 1684 1685int 1686resource_list_print_type(struct resource_list *rl, const char *name, int type, 1687 const char *format) 1688{ 1689 struct resource_list_entry *rle; 1690 int printed, retval; 1691 1692 printed = 0; 1693 retval = 0; 1694 /* Yes, this is kinda cheating */ 1695 SLIST_FOREACH(rle, rl, link) { 1696 if (rle->type == type) { 1697 if (printed == 0) 1698 retval += printf(" %s ", name); 1699 else 1700 retval += printf(","); 1701 printed++; 1702 retval += printf(format, rle->start); 1703 if (rle->count > 1) { 1704 retval += printf("-"); 1705 retval += printf(format, rle->start + 1706 rle->count - 1); 1707 } 1708 } 1709 } 1710 return (retval); 1711} 1712 1713/* 1714 * Call DEVICE_IDENTIFY for each driver. 1715 */ 1716int 1717bus_generic_probe(device_t dev) 1718{ 1719 devclass_t dc = dev->devclass; 1720 driverlink_t dl; 1721 1722 TAILQ_FOREACH(dl, &dc->drivers, link) { 1723 DEVICE_IDENTIFY(dl->driver, dev); 1724 } 1725 1726 return (0); 1727} 1728 1729int 1730bus_generic_attach(device_t dev) 1731{ 1732 device_t child; 1733 1734 TAILQ_FOREACH(child, &dev->children, link) { 1735 device_probe_and_attach(child); 1736 } 1737 1738 return (0); 1739} 1740 1741int 1742bus_generic_detach(device_t dev) 1743{ 1744 device_t child; 1745 int error; 1746 1747 if (dev->state != DS_ATTACHED) 1748 return (EBUSY); 1749 1750 TAILQ_FOREACH(child, &dev->children, link) { 1751 if ((error = device_detach(child)) != 0) 1752 return (error); 1753 } 1754 1755 return (0); 1756} 1757 1758int 1759bus_generic_shutdown(device_t dev) 1760{ 1761 device_t child; 1762 1763 TAILQ_FOREACH(child, &dev->children, link) { 1764 device_shutdown(child); 1765 } 1766 1767 return (0); 1768} 1769 1770int 1771bus_generic_suspend(device_t dev) 1772{ 1773 int error; 1774 device_t child, child2; 1775 1776 TAILQ_FOREACH(child, &dev->children, link) { 1777 error = DEVICE_SUSPEND(child); 1778 if (error) { 1779 for (child2 = TAILQ_FIRST(&dev->children); 1780 child2 && child2 != child; 1781 child2 = TAILQ_NEXT(child2, link)) 1782 DEVICE_RESUME(child2); 1783 return (error); 1784 } 1785 } 1786 return (0); 1787} 1788 1789int 1790bus_generic_resume(device_t dev) 1791{ 1792 device_t child; 1793 1794 TAILQ_FOREACH(child, &dev->children, link) { 1795 DEVICE_RESUME(child); 1796 /* if resume fails, there's nothing we can usefully do... */ 1797 } 1798 return (0); 1799} 1800 1801int 1802bus_print_child_header (device_t dev, device_t child) 1803{ 1804 int retval = 0; 1805 1806 if (device_get_desc(child)) { 1807 retval += device_printf(child, "<%s>", device_get_desc(child)); 1808 } else { 1809 retval += printf("%s", device_get_nameunit(child)); 1810 } 1811 1812 return (retval); 1813} 1814 1815int 1816bus_print_child_footer (device_t dev, device_t child) 1817{ 1818 return (printf(" on %s\n", device_get_nameunit(dev))); 1819} 1820 1821int 1822bus_generic_print_child(device_t dev, device_t child) 1823{ 1824 int retval = 0; 1825 1826 retval += bus_print_child_header(dev, child); 1827 retval += bus_print_child_footer(dev, child); 1828 1829 return (retval); 1830} 1831 1832int 1833bus_generic_read_ivar(device_t dev, device_t child, int index, 1834 uintptr_t * result) 1835{ 1836 return (ENOENT); 1837} 1838 1839int 1840bus_generic_write_ivar(device_t dev, device_t child, int index, 1841 uintptr_t value) 1842{ 1843 return (ENOENT); 1844} 1845 1846struct resource_list * 1847bus_generic_get_resource_list (device_t dev, device_t child) 1848{ 1849 return (NULL); 1850} 1851 1852void 1853bus_generic_driver_added(device_t dev, driver_t *driver) 1854{ 1855 device_t child; 1856 1857 DEVICE_IDENTIFY(driver, dev); 1858 TAILQ_FOREACH(child, &dev->children, link) { 1859 if (child->state == DS_NOTPRESENT) 1860 device_probe_and_attach(child); 1861 } 1862} 1863 1864int 1865bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1866 int flags, driver_intr_t *intr, void *arg, void **cookiep) 1867{ 1868 /* Propagate up the bus hierarchy until someone handles it. */ 1869 if (dev->parent) 1870 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1871 intr, arg, cookiep)); 1872 return (EINVAL); 1873} 1874 1875int 1876bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1877 void *cookie) 1878{ 1879 /* Propagate up the bus hierarchy until someone handles it. */ 1880 if (dev->parent) 1881 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1882 return (EINVAL); 1883} 1884 1885struct resource * 1886bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1887 u_long start, u_long end, u_long count, u_int flags) 1888{ 1889 /* Propagate up the bus hierarchy until someone handles it. */ 1890 if (dev->parent) 1891 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1892 start, end, count, flags)); 1893 return (NULL); 1894} 1895 1896int 1897bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1898 struct resource *r) 1899{ 1900 /* Propagate up the bus hierarchy until someone handles it. */ 1901 if (dev->parent) 1902 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1903 r)); 1904 return (EINVAL); 1905} 1906 1907int 1908bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1909 struct resource *r) 1910{ 1911 /* Propagate up the bus hierarchy until someone handles it. */ 1912 if (dev->parent) 1913 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1914 r)); 1915 return (EINVAL); 1916} 1917 1918int 1919bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1920 int rid, struct resource *r) 1921{ 1922 /* Propagate up the bus hierarchy until someone handles it. */ 1923 if (dev->parent) 1924 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1925 r)); 1926 return (EINVAL); 1927} 1928 1929int 1930bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, 1931 enum intr_polarity pol) 1932{ 1933 1934 /* Propagate up the bus hierarchy until someone handles it. */ 1935 if (dev->parent) 1936 return (BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); 1937 return (EINVAL); 1938} 1939 1940int 1941bus_generic_rl_get_resource (device_t dev, device_t child, int type, int rid, 1942 u_long *startp, u_long *countp) 1943{ 1944 struct resource_list * rl = NULL; 1945 struct resource_list_entry * rle = NULL; 1946 1947 rl = BUS_GET_RESOURCE_LIST(dev, child); 1948 if (!rl) 1949 return (EINVAL); 1950 1951 rle = resource_list_find(rl, type, rid); 1952 if (!rle) 1953 return (ENOENT); 1954 1955 if (startp) 1956 *startp = rle->start; 1957 if (countp) 1958 *countp = rle->count; 1959 1960 return (0); 1961} 1962 1963int 1964bus_generic_rl_set_resource (device_t dev, device_t child, int type, int rid, 1965 u_long start, u_long count) 1966{ 1967 struct resource_list * rl = NULL; 1968 1969 rl = BUS_GET_RESOURCE_LIST(dev, child); 1970 if (!rl) 1971 return (EINVAL); 1972 1973 resource_list_add(rl, type, rid, start, (start + count - 1), count); 1974 1975 return (0); 1976} 1977 1978void 1979bus_generic_rl_delete_resource (device_t dev, device_t child, int type, int rid) 1980{ 1981 struct resource_list * rl = NULL; 1982 1983 rl = BUS_GET_RESOURCE_LIST(dev, child); 1984 if (!rl) 1985 return; 1986 1987 resource_list_delete(rl, type, rid); 1988 1989 return; 1990} 1991 1992int 1993bus_generic_rl_release_resource (device_t dev, device_t child, int type, 1994 int rid, struct resource *r) 1995{ 1996 struct resource_list * rl = NULL; 1997 1998 rl = BUS_GET_RESOURCE_LIST(dev, child); 1999 if (!rl) 2000 return (EINVAL); 2001 2002 return (resource_list_release(rl, dev, child, type, rid, r)); 2003} 2004 2005struct resource * 2006bus_generic_rl_alloc_resource (device_t dev, device_t child, int type, 2007 int *rid, u_long start, u_long end, u_long count, u_int flags) 2008{ 2009 struct resource_list * rl = NULL; 2010 2011 rl = BUS_GET_RESOURCE_LIST(dev, child); 2012 if (!rl) 2013 return (NULL); 2014 2015 return (resource_list_alloc(rl, dev, child, type, rid, 2016 start, end, count, flags)); 2017} 2018 2019int 2020bus_generic_child_present(device_t bus, device_t child) 2021{ 2022 return (BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2023} 2024 2025/* 2026 * Some convenience functions to make it easier for drivers to use the 2027 * resource-management functions. All these really do is hide the 2028 * indirection through the parent's method table, making for slightly 2029 * less-wordy code. In the future, it might make sense for this code 2030 * to maintain some sort of a list of resources allocated by each device. 2031 */ 2032struct resource * 2033bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2034 u_long count, u_int flags) 2035{ 2036 if (dev->parent == 0) 2037 return (0); 2038 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2039 count, flags)); 2040} 2041 2042int 2043bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2044{ 2045 if (dev->parent == 0) 2046 return (EINVAL); 2047 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2048} 2049 2050int 2051bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2052{ 2053 if (dev->parent == 0) 2054 return (EINVAL); 2055 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2056} 2057 2058int 2059bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2060{ 2061 if (dev->parent == 0) 2062 return (EINVAL); 2063 return (BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2064} 2065 2066int 2067bus_setup_intr(device_t dev, struct resource *r, int flags, 2068 driver_intr_t handler, void *arg, void **cookiep) 2069{ 2070 int error; 2071 2072 if (dev->parent != 0) { 2073 error = BUS_SETUP_INTR(dev->parent, dev, r, flags, 2074 handler, arg, cookiep); 2075 if (error == 0) { 2076 if (flags & INTR_MPSAFE) 2077 device_printf(dev, "[MPSAFE]\n"); 2078 if (flags & INTR_FAST) 2079 device_printf(dev, "[FAST]\n"); 2080 } 2081 } else 2082 error = EINVAL; 2083 return (error); 2084} 2085 2086int 2087bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2088{ 2089 if (dev->parent == 0) 2090 return (EINVAL); 2091 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2092} 2093 2094int 2095bus_set_resource(device_t dev, int type, int rid, 2096 u_long start, u_long count) 2097{ 2098 return (BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2099 start, count)); 2100} 2101 2102int 2103bus_get_resource(device_t dev, int type, int rid, 2104 u_long *startp, u_long *countp) 2105{ 2106 return (BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2107 startp, countp)); 2108} 2109 2110u_long 2111bus_get_resource_start(device_t dev, int type, int rid) 2112{ 2113 u_long start, count; 2114 int error; 2115 2116 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2117 &start, &count); 2118 if (error) 2119 return (0); 2120 return (start); 2121} 2122 2123u_long 2124bus_get_resource_count(device_t dev, int type, int rid) 2125{ 2126 u_long start, count; 2127 int error; 2128 2129 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2130 &start, &count); 2131 if (error) 2132 return (0); 2133 return (count); 2134} 2135 2136void 2137bus_delete_resource(device_t dev, int type, int rid) 2138{ 2139 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2140} 2141 2142int 2143bus_child_present(device_t child) 2144{ 2145 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2146} 2147 2148int 2149bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2150{ 2151 device_t parent; 2152 2153 parent = device_get_parent(child); 2154 if (parent == NULL) { 2155 *buf = '\0'; 2156 return (0); 2157 } 2158 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2159} 2160 2161int 2162bus_child_location_str(device_t child, char *buf, size_t buflen) 2163{ 2164 device_t parent; 2165 2166 parent = device_get_parent(child); 2167 if (parent == NULL) { 2168 *buf = '\0'; 2169 return (0); 2170 } 2171 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2172} 2173 2174static int 2175root_print_child(device_t dev, device_t child) 2176{ 2177 int retval = 0; 2178 2179 retval += bus_print_child_header(dev, child); 2180 retval += printf("\n"); 2181 2182 return (retval); 2183} 2184 2185static int 2186root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2187 void **cookiep) 2188{ 2189 /* 2190 * If an interrupt mapping gets to here something bad has happened. 2191 */ 2192 panic("root_setup_intr"); 2193} 2194 2195/* 2196 * If we get here, assume that the device is permanant and really is 2197 * present in the system. Removable bus drivers are expected to intercept 2198 * this call long before it gets here. We return -1 so that drivers that 2199 * really care can check vs -1 or some ERRNO returned higher in the food 2200 * chain. 2201 */ 2202static int 2203root_child_present(device_t dev, device_t child) 2204{ 2205 return (-1); 2206} 2207 2208static kobj_method_t root_methods[] = { 2209 /* Device interface */ 2210 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2211 KOBJMETHOD(device_suspend, bus_generic_suspend), 2212 KOBJMETHOD(device_resume, bus_generic_resume), 2213 2214 /* Bus interface */ 2215 KOBJMETHOD(bus_print_child, root_print_child), 2216 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2217 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2218 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2219 KOBJMETHOD(bus_child_present, root_child_present), 2220 2221 { 0, 0 } 2222}; 2223 2224static driver_t root_driver = { 2225 "root", 2226 root_methods, 2227 1, /* no softc */ 2228}; 2229 2230device_t root_bus; 2231devclass_t root_devclass; 2232 2233static int 2234root_bus_module_handler(module_t mod, int what, void* arg) 2235{ 2236 switch (what) { 2237 case MOD_LOAD: 2238 TAILQ_INIT(&bus_data_devices); 2239 kobj_class_compile((kobj_class_t) &root_driver); 2240 root_bus = make_device(NULL, "root", 0); 2241 root_bus->desc = "System root bus"; 2242 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2243 root_bus->driver = &root_driver; 2244 root_bus->state = DS_ATTACHED; 2245 root_devclass = devclass_find_internal("root", FALSE); 2246 devinit(); 2247 return (0); 2248 2249 case MOD_SHUTDOWN: 2250 device_shutdown(root_bus); 2251 return (0); 2252 } 2253 2254 return (0); 2255} 2256 2257static moduledata_t root_bus_mod = { 2258 "rootbus", 2259 root_bus_module_handler, 2260 0 2261}; 2262DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2263 2264void 2265root_bus_configure(void) 2266{ 2267 device_t dev; 2268 2269 PDEBUG((".")); 2270 2271 TAILQ_FOREACH(dev, &root_bus->children, link) { 2272 device_probe_and_attach(dev); 2273 } 2274} 2275 2276int 2277driver_module_handler(module_t mod, int what, void *arg) 2278{ 2279 int error, i; 2280 struct driver_module_data *dmd; 2281 devclass_t bus_devclass; 2282 2283 dmd = (struct driver_module_data *)arg; 2284 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2285 error = 0; 2286 2287 switch (what) { 2288 case MOD_LOAD: 2289 if (dmd->dmd_chainevh) 2290 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2291 2292 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2293 PDEBUG(("Loading module: driver %s on bus %s", 2294 DRIVERNAME(dmd->dmd_drivers[i]), dmd->dmd_busname)); 2295 error = devclass_add_driver(bus_devclass, 2296 dmd->dmd_drivers[i]); 2297 } 2298 if (error) 2299 break; 2300 2301 /* 2302 * The drivers loaded in this way are assumed to all 2303 * implement the same devclass. 2304 */ 2305 *dmd->dmd_devclass = 2306 devclass_find_internal(dmd->dmd_drivers[0]->name, TRUE); 2307 break; 2308 2309 case MOD_UNLOAD: 2310 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2311 PDEBUG(("Unloading module: driver %s from bus %s", 2312 DRIVERNAME(dmd->dmd_drivers[i]), 2313 dmd->dmd_busname)); 2314 error = devclass_delete_driver(bus_devclass, 2315 dmd->dmd_drivers[i]); 2316 } 2317 2318 if (!error && dmd->dmd_chainevh) 2319 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2320 break; 2321 } 2322 2323 return (error); 2324} 2325 2326#ifdef BUS_DEBUG 2327 2328/* the _short versions avoid iteration by not calling anything that prints 2329 * more than oneliners. I love oneliners. 2330 */ 2331 2332static void 2333print_device_short(device_t dev, int indent) 2334{ 2335 if (!dev) 2336 return; 2337 2338 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2339 dev->unit, dev->desc, 2340 (dev->parent? "":"no "), 2341 (TAILQ_EMPTY(&dev->children)? "no ":""), 2342 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2343 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2344 (dev->flags&DF_WILDCARD? "wildcard,":""), 2345 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2346 (dev->ivars? "":"no "), 2347 (dev->softc? "":"no "), 2348 dev->busy)); 2349} 2350 2351static void 2352print_device(device_t dev, int indent) 2353{ 2354 if (!dev) 2355 return; 2356 2357 print_device_short(dev, indent); 2358 2359 indentprintf(("Parent:\n")); 2360 print_device_short(dev->parent, indent+1); 2361 indentprintf(("Driver:\n")); 2362 print_driver_short(dev->driver, indent+1); 2363 indentprintf(("Devclass:\n")); 2364 print_devclass_short(dev->devclass, indent+1); 2365} 2366 2367void 2368print_device_tree_short(device_t dev, int indent) 2369/* print the device and all its children (indented) */ 2370{ 2371 device_t child; 2372 2373 if (!dev) 2374 return; 2375 2376 print_device_short(dev, indent); 2377 2378 TAILQ_FOREACH(child, &dev->children, link) { 2379 print_device_tree_short(child, indent+1); 2380 } 2381} 2382 2383void 2384print_device_tree(device_t dev, int indent) 2385/* print the device and all its children (indented) */ 2386{ 2387 device_t child; 2388 2389 if (!dev) 2390 return; 2391 2392 print_device(dev, indent); 2393 2394 TAILQ_FOREACH(child, &dev->children, link) { 2395 print_device_tree(child, indent+1); 2396 } 2397} 2398 2399static void 2400print_driver_short(driver_t *driver, int indent) 2401{ 2402 if (!driver) 2403 return; 2404 2405 indentprintf(("driver %s: softc size = %zd\n", 2406 driver->name, driver->size)); 2407} 2408 2409static void 2410print_driver(driver_t *driver, int indent) 2411{ 2412 if (!driver) 2413 return; 2414 2415 print_driver_short(driver, indent); 2416} 2417 2418 2419static void 2420print_driver_list(driver_list_t drivers, int indent) 2421{ 2422 driverlink_t driver; 2423 2424 TAILQ_FOREACH(driver, &drivers, link) { 2425 print_driver(driver->driver, indent); 2426 } 2427} 2428 2429static void 2430print_devclass_short(devclass_t dc, int indent) 2431{ 2432 if ( !dc ) 2433 return; 2434 2435 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2436} 2437 2438static void 2439print_devclass(devclass_t dc, int indent) 2440{ 2441 int i; 2442 2443 if ( !dc ) 2444 return; 2445 2446 print_devclass_short(dc, indent); 2447 indentprintf(("Drivers:\n")); 2448 print_driver_list(dc->drivers, indent+1); 2449 2450 indentprintf(("Devices:\n")); 2451 for (i = 0; i < dc->maxunit; i++) 2452 if (dc->devices[i]) 2453 print_device(dc->devices[i], indent+1); 2454} 2455 2456void 2457print_devclass_list_short(void) 2458{ 2459 devclass_t dc; 2460 2461 printf("Short listing of devclasses, drivers & devices:\n"); 2462 TAILQ_FOREACH(dc, &devclasses, link) { 2463 print_devclass_short(dc, 0); 2464 } 2465} 2466 2467void 2468print_devclass_list(void) 2469{ 2470 devclass_t dc; 2471 2472 printf("Full listing of devclasses, drivers & devices:\n"); 2473 TAILQ_FOREACH(dc, &devclasses, link) { 2474 print_devclass(dc, 0); 2475 } 2476} 2477 2478#endif 2479 2480/* 2481 * User-space access to the device tree. 2482 * 2483 * We implement a small set of nodes: 2484 * 2485 * hw.bus Single integer read method to obtain the 2486 * current generation count. 2487 * hw.bus.devices Reads the entire device tree in flat space. 2488 * hw.bus.rman Resource manager interface 2489 * 2490 * We might like to add the ability to scan devclasses and/or drivers to 2491 * determine what else is currently loaded/available. 2492 */ 2493 2494static int 2495sysctl_bus(SYSCTL_HANDLER_ARGS) 2496{ 2497 struct u_businfo ubus; 2498 2499 ubus.ub_version = BUS_USER_VERSION; 2500 ubus.ub_generation = bus_data_generation; 2501 2502 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 2503} 2504SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 2505 "bus-related data"); 2506 2507static int 2508sysctl_devices(SYSCTL_HANDLER_ARGS) 2509{ 2510 int *name = (int *)arg1; 2511 u_int namelen = arg2; 2512 int index; 2513 struct device *dev; 2514 struct u_device udev; /* XXX this is a bit big */ 2515 int error; 2516 2517 if (namelen != 2) 2518 return (EINVAL); 2519 2520 if (bus_data_generation_check(name[0])) 2521 return (EINVAL); 2522 2523 index = name[1]; 2524 2525 /* 2526 * Scan the list of devices, looking for the requested index. 2527 */ 2528 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 2529 if (index-- == 0) 2530 break; 2531 } 2532 if (dev == NULL) 2533 return (ENOENT); 2534 2535 /* 2536 * Populate the return array. 2537 */ 2538 udev.dv_handle = (uintptr_t)dev; 2539 udev.dv_parent = (uintptr_t)dev->parent; 2540 if (dev->nameunit == NULL) 2541 udev.dv_name[0] = '\0'; 2542 else 2543 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 2544 2545 if (dev->desc == NULL) 2546 udev.dv_desc[0] = '\0'; 2547 else 2548 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 2549 if (dev->driver == NULL || dev->driver->name == NULL) 2550 udev.dv_drivername[0] = '\0'; 2551 else 2552 strlcpy(udev.dv_drivername, dev->driver->name, 2553 sizeof(udev.dv_drivername)); 2554 udev.dv_pnpinfo[0] = '\0'; 2555 udev.dv_location[0] = '\0'; 2556 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 2557 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 2558 udev.dv_devflags = dev->devflags; 2559 udev.dv_flags = dev->flags; 2560 udev.dv_state = dev->state; 2561 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 2562 return (error); 2563} 2564 2565SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 2566 "system device tree"); 2567 2568/* 2569 * Sysctl interface for scanning the resource lists. 2570 * 2571 * We take two input parameters; the index into the list of resource 2572 * managers, and the resource offset into the list. 2573 */ 2574static int 2575sysctl_rman(SYSCTL_HANDLER_ARGS) 2576{ 2577 int *name = (int *)arg1; 2578 u_int namelen = arg2; 2579 int rman_idx, res_idx; 2580 struct rman *rm; 2581 struct resource *res; 2582 struct u_rman urm; 2583 struct u_resource ures; 2584 int error; 2585 2586 if (namelen != 3) 2587 return (EINVAL); 2588 2589 if (bus_data_generation_check(name[0])) 2590 return (EINVAL); 2591 rman_idx = name[1]; 2592 res_idx = name[2]; 2593 2594 /* 2595 * Find the indexed resource manager 2596 */ 2597 TAILQ_FOREACH(rm, &rman_head, rm_link) { 2598 if (rman_idx-- == 0) 2599 break; 2600 } 2601 if (rm == NULL) 2602 return (ENOENT); 2603 2604 /* 2605 * If the resource index is -1, we want details on the 2606 * resource manager. 2607 */ 2608 if (res_idx == -1) { 2609 urm.rm_handle = (uintptr_t)rm; 2610 strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN); 2611 urm.rm_start = rm->rm_start; 2612 urm.rm_size = rm->rm_end - rm->rm_start + 1; 2613 urm.rm_type = rm->rm_type; 2614 2615 error = SYSCTL_OUT(req, &urm, sizeof(urm)); 2616 return (error); 2617 } 2618 2619 /* 2620 * Find the indexed resource and return it. 2621 */ 2622 TAILQ_FOREACH(res, &rm->rm_list, r_link) { 2623 if (res_idx-- == 0) { 2624 ures.r_handle = (uintptr_t)res; 2625 ures.r_parent = (uintptr_t)res->r_rm; 2626 ures.r_device = (uintptr_t)res->r_dev; 2627 if (res->r_dev != NULL) { 2628 if (device_get_name(res->r_dev) != NULL) { 2629 snprintf(ures.r_devname, RM_TEXTLEN, 2630 "%s%d", 2631 device_get_name(res->r_dev), 2632 device_get_unit(res->r_dev)); 2633 } else { 2634 strlcpy(ures.r_devname, "nomatch", 2635 RM_TEXTLEN); 2636 } 2637 } else { 2638 ures.r_devname[0] = '\0'; 2639 } 2640 ures.r_start = res->r_start; 2641 ures.r_size = res->r_end - res->r_start + 1; 2642 ures.r_flags = res->r_flags; 2643 2644 error = SYSCTL_OUT(req, &ures, sizeof(ures)); 2645 return (error); 2646 } 2647 } 2648 return (ENOENT); 2649} 2650 2651SYSCTL_NODE(_hw_bus, OID_AUTO, rman, CTLFLAG_RD, sysctl_rman, 2652 "kernel resource manager"); 2653 2654int 2655bus_data_generation_check(int generation) 2656{ 2657 if (generation != bus_data_generation) 2658 return (1); 2659 2660 /* XXX generate optimised lists here? */ 2661 return (0); 2662} 2663 2664void 2665bus_data_generation_update(void) 2666{ 2667 bus_data_generation++; 2668} 2669