subr_bus.c revision 113789
11797Sphk/*- 21797Sphk * Copyright (c) 1997,1998 Doug Rabson 31797Sphk * All rights reserved. 41797Sphk * 51797Sphk * Redistribution and use in source and binary forms, with or without 61797Sphk * modification, are permitted provided that the following conditions 71797Sphk * 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: head/sys/kern/subr_bus.c 113789 2003-04-21 05:58:51Z imp $ 27 */ 28 29#include "opt_bus.h" 30 31#include <sys/param.h> 32#include <sys/conf.h> 33#include <sys/filio.h> 34#include <sys/lock.h> 35#include <sys/kernel.h> 36#include <sys/kobj.h> 37#include <sys/malloc.h> 38#include <sys/module.h> 39#include <sys/mutex.h> 40#include <sys/poll.h> 41#include <sys/proc.h> 42#include <sys/condvar.h> 43#include <sys/queue.h> 44#include <machine/bus.h> 45#include <sys/rman.h> 46#include <sys/selinfo.h> 47#include <sys/signalvar.h> 48#include <sys/sysctl.h> 49#include <sys/systm.h> 50#include <sys/uio.h> 51#include <sys/bus.h> 52 53#include <machine/stdarg.h> 54 55#include <vm/uma.h> 56 57SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 58 59/* 60 * Used to attach drivers to devclasses. 61 */ 62typedef struct driverlink *driverlink_t; 63struct driverlink { 64 driver_t *driver; 65 TAILQ_ENTRY(driverlink) link; /* list of drivers in devclass */ 66}; 67 68/* 69 * Forward declarations 70 */ 71typedef TAILQ_HEAD(devclass_list, devclass) devclass_list_t; 72typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t; 73typedef TAILQ_HEAD(device_list, device) device_list_t; 74 75struct devclass { 76 TAILQ_ENTRY(devclass) link; 77 driver_list_t drivers; /* bus devclasses store drivers for bus */ 78 char *name; 79 device_t *devices; /* array of devices indexed by unit */ 80 int maxunit; /* size of devices array */ 81}; 82 83/* 84 * Implementation of device. 85 */ 86struct device { 87 /* 88 * A device is a kernel object. The first field must be the 89 * current ops table for the object. 90 */ 91 KOBJ_FIELDS; 92 93 /* 94 * Device hierarchy. 95 */ 96 TAILQ_ENTRY(device) link; /* list of devices in parent */ 97 TAILQ_ENTRY(device) devlink; /* global device list membership */ 98 device_t parent; 99 device_list_t children; /* list of subordinate devices */ 100 101 /* 102 * Details of this device. 103 */ 104 driver_t *driver; 105 devclass_t devclass; /* device class which we are in */ 106 int unit; 107 char* nameunit; /* name+unit e.g. foodev0 */ 108 char* desc; /* driver specific description */ 109 int busy; /* count of calls to device_busy() */ 110 device_state_t state; 111 u_int32_t devflags; /* api level flags for device_get_flags() */ 112 u_short flags; 113#define DF_ENABLED 1 /* device should be probed/attached */ 114#define DF_FIXEDCLASS 2 /* devclass specified at create time */ 115#define DF_WILDCARD 4 /* unit was originally wildcard */ 116#define DF_DESCMALLOCED 8 /* description was malloced */ 117#define DF_QUIET 16 /* don't print verbose attach message */ 118#define DF_DONENOMATCH 32 /* don't execute DEVICE_NOMATCH again */ 119#define DF_EXTERNALSOFTC 64 /* softc not allocated by us */ 120 u_char order; /* order from device_add_child_ordered() */ 121 u_char pad; 122 void *ivars; 123 void *softc; 124}; 125 126struct device_op_desc { 127 unsigned int offset; /* offset in driver ops */ 128 struct method* method; /* internal method implementation */ 129 devop_t deflt; /* default implementation */ 130 const char* name; /* unique name (for registration) */ 131}; 132 133static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 134 135#ifdef BUS_DEBUG 136 137static int bus_debug = 1; 138TUNABLE_INT("bus.debug", &bus_debug); 139SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0, 140 "Debug bus code"); 141 142#define PDEBUG(a) if (bus_debug) {printf("%s:%d: ", __func__, __LINE__), printf a; printf("\n");} 143#define DEVICENAME(d) ((d)? device_get_name(d): "no device") 144#define DRIVERNAME(d) ((d)? d->name : "no driver") 145#define DEVCLANAME(d) ((d)? d->name : "no devclass") 146 147/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 148 * prevent syslog from deleting initial spaces 149 */ 150#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while (0) 151 152static void print_device_short(device_t dev, int indent); 153static void print_device(device_t dev, int indent); 154void print_device_tree_short(device_t dev, int indent); 155void print_device_tree(device_t dev, int indent); 156static void print_driver_short(driver_t *driver, int indent); 157static void print_driver(driver_t *driver, int indent); 158static void print_driver_list(driver_list_t drivers, int indent); 159static void print_devclass_short(devclass_t dc, int indent); 160static void print_devclass(devclass_t dc, int indent); 161void print_devclass_list_short(void); 162void print_devclass_list(void); 163 164#else 165/* Make the compiler ignore the function calls */ 166#define PDEBUG(a) /* nop */ 167#define DEVICENAME(d) /* nop */ 168#define DRIVERNAME(d) /* nop */ 169#define DEVCLANAME(d) /* nop */ 170 171#define print_device_short(d,i) /* nop */ 172#define print_device(d,i) /* nop */ 173#define print_device_tree_short(d,i) /* nop */ 174#define print_device_tree(d,i) /* nop */ 175#define print_driver_short(d,i) /* nop */ 176#define print_driver(d,i) /* nop */ 177#define print_driver_list(d,i) /* nop */ 178#define print_devclass_short(d,i) /* nop */ 179#define print_devclass(d,i) /* nop */ 180#define print_devclass_list_short() /* nop */ 181#define print_devclass_list() /* nop */ 182#endif 183 184/* 185 * /dev/devctl implementation 186 */ 187 188/* 189 * This design allows only one reader for /dev/devctl. This is not desirable 190 * in the long run, but will get a lot of hair out of this implementation. 191 * Maybe we should make this device a clonable device. 192 * 193 * Also note: we specifically do not attach a device to the device_t tree 194 * to avoid potential chicken and egg problems. One could argue that all 195 * of this belongs to the root node. One could also further argue that the 196 * sysctl interface that we have not might more properly be an ioctl 197 * interface, but at this stage of the game, I'm not inclined to rock that 198 * boat. 199 * 200 * I'm also not sure that the SIGIO support is done correctly or not, as 201 * I copied it from a driver that had SIGIO support that likely hasn't been 202 * tested since 3.4 or 2.2.8! 203 */ 204 205static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 206static int devctl_disable = 0; 207TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 208SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, 209 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_devctl_disable, 210 "I", "devctl disable"); 211 212static d_open_t devopen; 213static d_close_t devclose; 214static d_read_t devread; 215static d_ioctl_t devioctl; 216static d_poll_t devpoll; 217 218#define CDEV_MAJOR 173 219static struct cdevsw dev_cdevsw = { 220 .d_open = devopen, 221 .d_close = devclose, 222 .d_read = devread, 223 .d_ioctl = devioctl, 224 .d_poll = devpoll, 225 .d_name = "devctl", 226 .d_maj = CDEV_MAJOR, 227}; 228 229struct dev_event_info 230{ 231 char *dei_data; 232 TAILQ_ENTRY(dev_event_info) dei_link; 233}; 234 235TAILQ_HEAD(devq, dev_event_info); 236 237struct dev_softc 238{ 239 int inuse; 240 int nonblock; 241 struct mtx mtx; 242 struct cv cv; 243 struct selinfo sel; 244 struct devq devq; 245 struct proc *async_proc; 246} devsoftc; 247 248dev_t devctl_dev; 249 250static void 251devinit(void) 252{ 253 devctl_dev = make_dev(&dev_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, 254 "devctl"); 255 mtx_init(&devsoftc.mtx, "dev mtx", "devd", MTX_DEF); 256 cv_init(&devsoftc.cv, "dev cv"); 257 TAILQ_INIT(&devsoftc.devq); 258} 259 260static int 261devopen(dev_t dev, int oflags, int devtype, d_thread_t *td) 262{ 263 if (devsoftc.inuse) 264 return (EBUSY); 265 /* move to init */ 266 devsoftc.inuse = 1; 267 devsoftc.nonblock = 0; 268 devsoftc.async_proc = NULL; 269 return (0); 270} 271 272static int 273devclose(dev_t dev, int fflag, int devtype, d_thread_t *td) 274{ 275 devsoftc.inuse = 0; 276 mtx_lock(&devsoftc.mtx); 277 cv_broadcast(&devsoftc.cv); 278 mtx_unlock(&devsoftc.mtx); 279 280 return (0); 281} 282 283/* 284 * The read channel for this device is used to report changes to 285 * userland in realtime. We are required to free the data as well as 286 * the n1 object because we allocate them separately. Also note that 287 * we return one record at a time. If you try to read this device a 288 * character at a time, you will loose the rest of the data. Listening 289 * programs are expected to cope. 290 */ 291static int 292devread(dev_t dev, struct uio *uio, int ioflag) 293{ 294 struct dev_event_info *n1; 295 int rv; 296 297 mtx_lock(&devsoftc.mtx); 298 while (TAILQ_EMPTY(&devsoftc.devq)) { 299 if (devsoftc.nonblock) { 300 mtx_unlock(&devsoftc.mtx); 301 return (EAGAIN); 302 } 303 rv = cv_wait_sig(&devsoftc.cv, &devsoftc.mtx); 304 if (rv) { 305 /* 306 * Need to translate ERESTART to EINTR here? -- jake 307 */ 308 mtx_unlock(&devsoftc.mtx); 309 return (rv); 310 } 311 } 312 n1 = TAILQ_FIRST(&devsoftc.devq); 313 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 314 mtx_unlock(&devsoftc.mtx); 315 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 316 free(n1->dei_data, M_BUS); 317 free(n1, M_BUS); 318 return (rv); 319} 320 321static int 322devioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, d_thread_t *td) 323{ 324 switch (cmd) { 325 326 case FIONBIO: 327 if (*(int*)data) 328 devsoftc.nonblock = 1; 329 else 330 devsoftc.nonblock = 0; 331 return (0); 332 case FIOASYNC: 333 if (*(int*)data) 334 devsoftc.async_proc = td->td_proc; 335 else 336 devsoftc.async_proc = NULL; 337 return (0); 338 339 /* (un)Support for other fcntl() calls. */ 340 case FIOCLEX: 341 case FIONCLEX: 342 case FIONREAD: 343 case FIOSETOWN: 344 case FIOGETOWN: 345 default: 346 break; 347 } 348 return (ENOTTY); 349} 350 351static int 352devpoll(dev_t dev, int events, d_thread_t *td) 353{ 354 int revents = 0; 355 356 mtx_lock(&devsoftc.mtx); 357 if (events & (POLLIN | POLLRDNORM)) { 358 if (!TAILQ_EMPTY(&devsoftc.devq)) 359 revents = events & (POLLIN | POLLRDNORM); 360 else 361 selrecord(td, &devsoftc.sel); 362 } 363 mtx_unlock(&devsoftc.mtx); 364 365 return (revents); 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 */ 376static void 377devaddq(const char *type, const char *what, device_t dev) 378{ 379 struct dev_event_info *n1 = NULL; 380 struct proc *p; 381 char *data = NULL; 382 char *loc; 383 const char *parstr; 384 385 if (devctl_disable) 386 return; 387 n1 = malloc(sizeof(*n1), M_BUS, M_NOWAIT); 388 if (n1 == NULL) 389 goto bad; 390 data = malloc(1024, M_BUS, M_NOWAIT); 391 if (data == NULL) 392 goto bad; 393 loc = malloc(1024, M_BUS, M_NOWAIT); 394 if (loc == NULL) 395 goto bad; 396 *loc = '\0'; 397 bus_child_location_str(dev, loc, 1024); 398 if (device_get_parent(dev) == NULL) 399 parstr = "."; /* Or '/' ? */ 400 else 401 parstr = device_get_nameunit(device_get_parent(dev)); 402 snprintf(data, 1024, "%s%s at %s on %s\n", type, what, loc, parstr); 403 free(loc, M_BUS); 404 n1->dei_data = data; 405 mtx_lock(&devsoftc.mtx); 406 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 407 cv_broadcast(&devsoftc.cv); 408 mtx_unlock(&devsoftc.mtx); 409 selwakeup(&devsoftc.sel); 410 p = devsoftc.async_proc; 411 if (p != NULL) { 412 PROC_LOCK(p); 413 psignal(p, SIGIO); 414 PROC_UNLOCK(p); 415 } 416 return; 417bad:; 418 free(data, M_BUS); 419 free(n1, M_BUS); 420 return; 421} 422 423/* 424 * A device was added to the tree. We are called just after it successfully 425 * attaches (that is, probe and attach success for this device). No call 426 * is made if a device is merely parented into the tree. See devnomatch 427 * if probe fails. If attach fails, no notification is sent (but maybe 428 * we should have a different message for this). 429 */ 430static void 431devadded(device_t dev) 432{ 433 devaddq("+", device_get_nameunit(dev), dev); 434} 435 436/* 437 * A device was removed from the tree. We are called just before this 438 * happens. 439 */ 440static void 441devremoved(device_t dev) 442{ 443 devaddq("-", device_get_nameunit(dev), dev); 444} 445 446/* 447 * Called when there's no match for this device. This is only called 448 * the first time that no match happens, so we don't keep getitng this 449 * message. Should that prove to be undesirable, we can change it. 450 * This is called when all drivers that can attach to a given bus 451 * decline to accept this device. Other errrors may not be detected. 452 */ 453static void 454devnomatch(device_t dev) 455{ 456 char *pnp = NULL; 457 458 pnp = malloc(1024, M_BUS, M_NOWAIT); 459 if (pnp == NULL) 460 return; 461 *pnp = '\0'; 462 bus_child_pnpinfo_str(dev, pnp, 1024); 463 devaddq("?", pnp, dev); 464 free(pnp, M_BUS); 465 return; 466} 467 468static int 469sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 470{ 471 struct dev_event_info *n1; 472 int dis, error; 473 474 dis = devctl_disable; 475 error = sysctl_handle_int(oidp, &dis, 0, req); 476 if (error || !req->newptr) 477 return (error); 478 mtx_lock(&devsoftc.mtx); 479 devctl_disable = dis; 480 if (dis) { 481 while (!TAILQ_EMPTY(&devsoftc.devq)) { 482 n1 = TAILQ_FIRST(&devsoftc.devq); 483 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 484 free(n1->dei_data, M_BUS); 485 free(n1, M_BUS); 486 } 487 } 488 mtx_unlock(&devsoftc.mtx); 489 return (0); 490} 491 492/* End of /dev/devctl code */ 493 494TAILQ_HEAD(,device) bus_data_devices; 495static int bus_data_generation = 1; 496 497kobj_method_t null_methods[] = { 498 { 0, 0 } 499}; 500 501DEFINE_CLASS(null, null_methods, 0); 502 503/* 504 * Devclass implementation 505 */ 506 507static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 508 509static devclass_t 510devclass_find_internal(const char *classname, int create) 511{ 512 devclass_t dc; 513 514 PDEBUG(("looking for %s", classname)); 515 if (!classname) 516 return (NULL); 517 518 TAILQ_FOREACH(dc, &devclasses, link) { 519 if (!strcmp(dc->name, classname)) 520 return (dc); 521 } 522 523 PDEBUG(("%s not found%s", classname, (create? ", creating": ""))); 524 if (create) { 525 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 526 M_BUS, M_NOWAIT|M_ZERO); 527 if (!dc) 528 return (NULL); 529 dc->name = (char*) (dc + 1); 530 strcpy(dc->name, classname); 531 TAILQ_INIT(&dc->drivers); 532 TAILQ_INSERT_TAIL(&devclasses, dc, link); 533 534 bus_data_generation_update(); 535 } 536 537 return (dc); 538} 539 540devclass_t 541devclass_create(const char *classname) 542{ 543 return (devclass_find_internal(classname, TRUE)); 544} 545 546devclass_t 547devclass_find(const char *classname) 548{ 549 return (devclass_find_internal(classname, FALSE)); 550} 551 552int 553devclass_add_driver(devclass_t dc, driver_t *driver) 554{ 555 driverlink_t dl; 556 int i; 557 558 PDEBUG(("%s", DRIVERNAME(driver))); 559 560 dl = malloc(sizeof *dl, M_BUS, M_NOWAIT|M_ZERO); 561 if (!dl) 562 return (ENOMEM); 563 564 /* 565 * Compile the driver's methods. Also increase the reference count 566 * so that the class doesn't get freed when the last instance 567 * goes. This means we can safely use static methods and avoids a 568 * double-free in devclass_delete_driver. 569 */ 570 kobj_class_compile((kobj_class_t) driver); 571 572 /* 573 * Make sure the devclass which the driver is implementing exists. 574 */ 575 devclass_find_internal(driver->name, TRUE); 576 577 dl->driver = driver; 578 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 579 driver->refs++; 580 581 /* 582 * Call BUS_DRIVER_ADDED for any existing busses in this class. 583 */ 584 for (i = 0; i < dc->maxunit; i++) 585 if (dc->devices[i]) 586 BUS_DRIVER_ADDED(dc->devices[i], driver); 587 588 bus_data_generation_update(); 589 return (0); 590} 591 592int 593devclass_delete_driver(devclass_t busclass, driver_t *driver) 594{ 595 devclass_t dc = devclass_find(driver->name); 596 driverlink_t dl; 597 device_t dev; 598 int i; 599 int error; 600 601 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 602 603 if (!dc) 604 return (0); 605 606 /* 607 * Find the link structure in the bus' list of drivers. 608 */ 609 TAILQ_FOREACH(dl, &busclass->drivers, link) { 610 if (dl->driver == driver) 611 break; 612 } 613 614 if (!dl) { 615 PDEBUG(("%s not found in %s list", driver->name, 616 busclass->name)); 617 return (ENOENT); 618 } 619 620 /* 621 * Disassociate from any devices. We iterate through all the 622 * devices in the devclass of the driver and detach any which are 623 * using the driver and which have a parent in the devclass which 624 * we are deleting from. 625 * 626 * Note that since a driver can be in multiple devclasses, we 627 * should not detach devices which are not children of devices in 628 * the affected devclass. 629 */ 630 for (i = 0; i < dc->maxunit; i++) { 631 if (dc->devices[i]) { 632 dev = dc->devices[i]; 633 if (dev->driver == driver && dev->parent && 634 dev->parent->devclass == busclass) { 635 if ((error = device_detach(dev)) != 0) 636 return (error); 637 device_set_driver(dev, NULL); 638 } 639 } 640 } 641 642 TAILQ_REMOVE(&busclass->drivers, dl, link); 643 free(dl, M_BUS); 644 645 driver->refs--; 646 if (driver->refs == 0) 647 kobj_class_free((kobj_class_t) driver); 648 649 bus_data_generation_update(); 650 return (0); 651} 652 653static driverlink_t 654devclass_find_driver_internal(devclass_t dc, const char *classname) 655{ 656 driverlink_t dl; 657 658 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 659 660 TAILQ_FOREACH(dl, &dc->drivers, link) { 661 if (!strcmp(dl->driver->name, classname)) 662 return (dl); 663 } 664 665 PDEBUG(("not found")); 666 return (NULL); 667} 668 669driver_t * 670devclass_find_driver(devclass_t dc, const char *classname) 671{ 672 driverlink_t dl; 673 674 dl = devclass_find_driver_internal(dc, classname); 675 if (dl) 676 return (dl->driver); 677 return (NULL); 678} 679 680const char * 681devclass_get_name(devclass_t dc) 682{ 683 return (dc->name); 684} 685 686device_t 687devclass_get_device(devclass_t dc, int unit) 688{ 689 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 690 return (NULL); 691 return (dc->devices[unit]); 692} 693 694void * 695devclass_get_softc(devclass_t dc, int unit) 696{ 697 device_t dev; 698 699 dev = devclass_get_device(dc, unit); 700 if (!dev) 701 return (NULL); 702 703 return (device_get_softc(dev)); 704} 705 706int 707devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 708{ 709 int i; 710 int count; 711 device_t *list; 712 713 count = 0; 714 for (i = 0; i < dc->maxunit; i++) 715 if (dc->devices[i]) 716 count++; 717 718 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO); 719 if (!list) 720 return (ENOMEM); 721 722 count = 0; 723 for (i = 0; i < dc->maxunit; i++) { 724 if (dc->devices[i]) { 725 list[count] = dc->devices[i]; 726 count++; 727 } 728 } 729 730 *devlistp = list; 731 *devcountp = count; 732 733 return (0); 734} 735 736int 737devclass_get_maxunit(devclass_t dc) 738{ 739 return (dc->maxunit); 740} 741 742int 743devclass_find_free_unit(devclass_t dc, int unit) 744{ 745 if (dc == NULL) 746 return (unit); 747 while (unit < dc->maxunit && dc->devices[unit] != NULL) 748 unit++; 749 return (unit); 750} 751 752static int 753devclass_alloc_unit(devclass_t dc, int *unitp) 754{ 755 int unit = *unitp; 756 757 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 758 759 /* If we were given a wired unit number, check for existing device */ 760 /* XXX imp XXX */ 761 if (unit != -1) { 762 if (unit >= 0 && unit < dc->maxunit && 763 dc->devices[unit] != NULL) { 764 if (bootverbose) 765 printf("%s: %s%d already exists; skipping it\n", 766 dc->name, dc->name, *unitp); 767 return (EEXIST); 768 } 769 } else { 770 /* Unwired device, find the next available slot for it */ 771 unit = 0; 772 while (unit < dc->maxunit && dc->devices[unit] != NULL) 773 unit++; 774 } 775 776 /* 777 * We've selected a unit beyond the length of the table, so let's 778 * extend the table to make room for all units up to and including 779 * this one. 780 */ 781 if (unit >= dc->maxunit) { 782 device_t *newlist; 783 int newsize; 784 785 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 786 newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT); 787 if (!newlist) 788 return (ENOMEM); 789 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 790 bzero(newlist + dc->maxunit, 791 sizeof(device_t) * (newsize - dc->maxunit)); 792 if (dc->devices) 793 free(dc->devices, M_BUS); 794 dc->devices = newlist; 795 dc->maxunit = newsize; 796 } 797 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 798 799 *unitp = unit; 800 return (0); 801} 802 803static int 804devclass_add_device(devclass_t dc, device_t dev) 805{ 806 int buflen, error; 807 808 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 809 810 buflen = snprintf(NULL, 0, "%s%d$", dc->name, dev->unit); 811 if (buflen < 0) 812 return (ENOMEM); 813 dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT|M_ZERO); 814 if (!dev->nameunit) 815 return (ENOMEM); 816 817 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 818 free(dev->nameunit, M_BUS); 819 dev->nameunit = NULL; 820 return (error); 821 } 822 dc->devices[dev->unit] = dev; 823 dev->devclass = dc; 824 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 825 826 return (0); 827} 828 829static int 830devclass_delete_device(devclass_t dc, device_t dev) 831{ 832 if (!dc || !dev) 833 return (0); 834 835 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 836 837 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 838 panic("devclass_delete_device: inconsistent device class"); 839 dc->devices[dev->unit] = NULL; 840 if (dev->flags & DF_WILDCARD) 841 dev->unit = -1; 842 dev->devclass = NULL; 843 free(dev->nameunit, M_BUS); 844 dev->nameunit = NULL; 845 846 return (0); 847} 848 849static device_t 850make_device(device_t parent, const char *name, int unit) 851{ 852 device_t dev; 853 devclass_t dc; 854 855 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 856 857 if (name) { 858 dc = devclass_find_internal(name, TRUE); 859 if (!dc) { 860 printf("make_device: can't find device class %s\n", 861 name); 862 return (NULL); 863 } 864 } else { 865 dc = NULL; 866 } 867 868 dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT|M_ZERO); 869 if (!dev) 870 return (NULL); 871 872 dev->parent = parent; 873 TAILQ_INIT(&dev->children); 874 kobj_init((kobj_t) dev, &null_class); 875 dev->driver = NULL; 876 dev->devclass = NULL; 877 dev->unit = unit; 878 dev->nameunit = NULL; 879 dev->desc = NULL; 880 dev->busy = 0; 881 dev->devflags = 0; 882 dev->flags = DF_ENABLED; 883 dev->order = 0; 884 if (unit == -1) 885 dev->flags |= DF_WILDCARD; 886 if (name) { 887 dev->flags |= DF_FIXEDCLASS; 888 if (devclass_add_device(dc, dev)) { 889 kobj_delete((kobj_t) dev, M_BUS); 890 return (NULL); 891 } 892 } 893 dev->ivars = NULL; 894 dev->softc = NULL; 895 896 dev->state = DS_NOTPRESENT; 897 898 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 899 bus_data_generation_update(); 900 901 return (dev); 902} 903 904static int 905device_print_child(device_t dev, device_t child) 906{ 907 int retval = 0; 908 909 if (device_is_alive(child)) 910 retval += BUS_PRINT_CHILD(dev, child); 911 else 912 retval += device_printf(child, " not found\n"); 913 914 return (retval); 915} 916 917device_t 918device_add_child(device_t dev, const char *name, int unit) 919{ 920 return (device_add_child_ordered(dev, 0, name, unit)); 921} 922 923device_t 924device_add_child_ordered(device_t dev, int order, const char *name, int unit) 925{ 926 device_t child; 927 device_t place; 928 929 PDEBUG(("%s at %s with order %d as unit %d", 930 name, DEVICENAME(dev), order, unit)); 931 932 child = make_device(dev, name, unit); 933 if (child == NULL) 934 return (child); 935 child->order = order; 936 937 TAILQ_FOREACH(place, &dev->children, link) { 938 if (place->order > order) 939 break; 940 } 941 942 if (place) { 943 /* 944 * The device 'place' is the first device whose order is 945 * greater than the new child. 946 */ 947 TAILQ_INSERT_BEFORE(place, child, link); 948 } else { 949 /* 950 * The new child's order is greater or equal to the order of 951 * any existing device. Add the child to the tail of the list. 952 */ 953 TAILQ_INSERT_TAIL(&dev->children, child, link); 954 } 955 956 bus_data_generation_update(); 957 return (child); 958} 959 960int 961device_delete_child(device_t dev, device_t child) 962{ 963 int error; 964 device_t grandchild; 965 966 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 967 968 /* remove children first */ 969 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 970 error = device_delete_child(child, grandchild); 971 if (error) 972 return (error); 973 } 974 975 if ((error = device_detach(child)) != 0) 976 return (error); 977 if (child->devclass) 978 devclass_delete_device(child->devclass, child); 979 TAILQ_REMOVE(&dev->children, child, link); 980 TAILQ_REMOVE(&bus_data_devices, child, devlink); 981 device_set_desc(child, NULL); 982 kobj_delete((kobj_t) child, M_BUS); 983 984 bus_data_generation_update(); 985 return (0); 986} 987 988/* 989 * Find only devices attached to this bus. 990 */ 991device_t 992device_find_child(device_t dev, const char *classname, int unit) 993{ 994 devclass_t dc; 995 device_t child; 996 997 dc = devclass_find(classname); 998 if (!dc) 999 return (NULL); 1000 1001 child = devclass_get_device(dc, unit); 1002 if (child && child->parent == dev) 1003 return (child); 1004 return (NULL); 1005} 1006 1007static driverlink_t 1008first_matching_driver(devclass_t dc, device_t dev) 1009{ 1010 if (dev->devclass) 1011 return (devclass_find_driver_internal(dc, dev->devclass->name)); 1012 return (TAILQ_FIRST(&dc->drivers)); 1013} 1014 1015static driverlink_t 1016next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1017{ 1018 if (dev->devclass) { 1019 driverlink_t dl; 1020 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1021 if (!strcmp(dev->devclass->name, dl->driver->name)) 1022 return (dl); 1023 return (NULL); 1024 } 1025 return (TAILQ_NEXT(last, link)); 1026} 1027 1028static int 1029device_probe_child(device_t dev, device_t child) 1030{ 1031 devclass_t dc; 1032 driverlink_t best = 0; 1033 driverlink_t dl; 1034 int result, pri = 0; 1035 int hasclass = (child->devclass != 0); 1036 1037 dc = dev->devclass; 1038 if (!dc) 1039 panic("device_probe_child: parent device has no devclass"); 1040 1041 if (child->state == DS_ALIVE) 1042 return (0); 1043 1044 for (dl = first_matching_driver(dc, child); 1045 dl; 1046 dl = next_matching_driver(dc, child, dl)) { 1047 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1048 device_set_driver(child, dl->driver); 1049 if (!hasclass) 1050 device_set_devclass(child, dl->driver->name); 1051 result = DEVICE_PROBE(child); 1052 if (!hasclass) 1053 device_set_devclass(child, 0); 1054 1055 /* 1056 * If the driver returns SUCCESS, there can be no higher match 1057 * for this device. 1058 */ 1059 if (result == 0) { 1060 best = dl; 1061 pri = 0; 1062 break; 1063 } 1064 1065 /* 1066 * The driver returned an error so it certainly doesn't match. 1067 */ 1068 if (result > 0) { 1069 device_set_driver(child, 0); 1070 continue; 1071 } 1072 1073 /* 1074 * A priority lower than SUCCESS, remember the best matching 1075 * driver. Initialise the value of pri for the first match. 1076 */ 1077 if (best == 0 || result > pri) { 1078 best = dl; 1079 pri = result; 1080 continue; 1081 } 1082 } 1083 1084 /* 1085 * If we found a driver, change state and initialise the devclass. 1086 */ 1087 if (best) { 1088 if (!child->devclass) 1089 device_set_devclass(child, best->driver->name); 1090 device_set_driver(child, best->driver); 1091 if (pri < 0) { 1092 /* 1093 * A bit bogus. Call the probe method again to make 1094 * sure that we have the right description. 1095 */ 1096 DEVICE_PROBE(child); 1097 } 1098 child->state = DS_ALIVE; 1099 1100 bus_data_generation_update(); 1101 return (0); 1102 } 1103 1104 return (ENXIO); 1105} 1106 1107device_t 1108device_get_parent(device_t dev) 1109{ 1110 return (dev->parent); 1111} 1112 1113int 1114device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1115{ 1116 int count; 1117 device_t child; 1118 device_t *list; 1119 1120 count = 0; 1121 TAILQ_FOREACH(child, &dev->children, link) { 1122 count++; 1123 } 1124 1125 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO); 1126 if (!list) 1127 return (ENOMEM); 1128 1129 count = 0; 1130 TAILQ_FOREACH(child, &dev->children, link) { 1131 list[count] = child; 1132 count++; 1133 } 1134 1135 *devlistp = list; 1136 *devcountp = count; 1137 1138 return (0); 1139} 1140 1141driver_t * 1142device_get_driver(device_t dev) 1143{ 1144 return (dev->driver); 1145} 1146 1147devclass_t 1148device_get_devclass(device_t dev) 1149{ 1150 return (dev->devclass); 1151} 1152 1153const char * 1154device_get_name(device_t dev) 1155{ 1156 if (dev != NULL && dev->devclass) 1157 return (devclass_get_name(dev->devclass)); 1158 return (NULL); 1159} 1160 1161const char * 1162device_get_nameunit(device_t dev) 1163{ 1164 return (dev->nameunit); 1165} 1166 1167int 1168device_get_unit(device_t dev) 1169{ 1170 return (dev->unit); 1171} 1172 1173const char * 1174device_get_desc(device_t dev) 1175{ 1176 return (dev->desc); 1177} 1178 1179u_int32_t 1180device_get_flags(device_t dev) 1181{ 1182 return (dev->devflags); 1183} 1184 1185int 1186device_print_prettyname(device_t dev) 1187{ 1188 const char *name = device_get_name(dev); 1189 1190 if (name == 0) 1191 return (printf("unknown: ")); 1192 return (printf("%s%d: ", name, device_get_unit(dev))); 1193} 1194 1195int 1196device_printf(device_t dev, const char * fmt, ...) 1197{ 1198 va_list ap; 1199 int retval; 1200 1201 retval = device_print_prettyname(dev); 1202 va_start(ap, fmt); 1203 retval += vprintf(fmt, ap); 1204 va_end(ap); 1205 return (retval); 1206} 1207 1208static void 1209device_set_desc_internal(device_t dev, const char* desc, int copy) 1210{ 1211 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1212 free(dev->desc, M_BUS); 1213 dev->flags &= ~DF_DESCMALLOCED; 1214 dev->desc = NULL; 1215 } 1216 1217 if (copy && desc) { 1218 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT); 1219 if (dev->desc) { 1220 strcpy(dev->desc, desc); 1221 dev->flags |= DF_DESCMALLOCED; 1222 } 1223 } else { 1224 /* Avoid a -Wcast-qual warning */ 1225 dev->desc = (char *)(uintptr_t) desc; 1226 } 1227 1228 bus_data_generation_update(); 1229} 1230 1231void 1232device_set_desc(device_t dev, const char* desc) 1233{ 1234 device_set_desc_internal(dev, desc, FALSE); 1235} 1236 1237void 1238device_set_desc_copy(device_t dev, const char* desc) 1239{ 1240 device_set_desc_internal(dev, desc, TRUE); 1241} 1242 1243void 1244device_set_flags(device_t dev, u_int32_t flags) 1245{ 1246 dev->devflags = flags; 1247} 1248 1249void * 1250device_get_softc(device_t dev) 1251{ 1252 return (dev->softc); 1253} 1254 1255void 1256device_set_softc(device_t dev, void *softc) 1257{ 1258 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1259 free(dev->softc, M_BUS); 1260 dev->softc = softc; 1261 if (dev->softc) 1262 dev->flags |= DF_EXTERNALSOFTC; 1263 else 1264 dev->flags &= ~DF_EXTERNALSOFTC; 1265} 1266 1267void * 1268device_get_ivars(device_t dev) 1269{ 1270 1271 KASSERT(dev != NULL, ("device_get_ivars(NULL, ...)")); 1272 return (dev->ivars); 1273} 1274 1275void 1276device_set_ivars(device_t dev, void * ivars) 1277{ 1278 1279 KASSERT(dev != NULL, ("device_set_ivars(NULL, ...)")); 1280 dev->ivars = ivars; 1281} 1282 1283device_state_t 1284device_get_state(device_t dev) 1285{ 1286 return (dev->state); 1287} 1288 1289void 1290device_enable(device_t dev) 1291{ 1292 dev->flags |= DF_ENABLED; 1293} 1294 1295void 1296device_disable(device_t dev) 1297{ 1298 dev->flags &= ~DF_ENABLED; 1299} 1300 1301void 1302device_busy(device_t dev) 1303{ 1304 if (dev->state < DS_ATTACHED) 1305 panic("device_busy: called for unattached device"); 1306 if (dev->busy == 0 && dev->parent) 1307 device_busy(dev->parent); 1308 dev->busy++; 1309 dev->state = DS_BUSY; 1310} 1311 1312void 1313device_unbusy(device_t dev) 1314{ 1315 if (dev->state != DS_BUSY) 1316 panic("device_unbusy: called for non-busy device"); 1317 dev->busy--; 1318 if (dev->busy == 0) { 1319 if (dev->parent) 1320 device_unbusy(dev->parent); 1321 dev->state = DS_ATTACHED; 1322 } 1323} 1324 1325void 1326device_quiet(device_t dev) 1327{ 1328 dev->flags |= DF_QUIET; 1329} 1330 1331void 1332device_verbose(device_t dev) 1333{ 1334 dev->flags &= ~DF_QUIET; 1335} 1336 1337int 1338device_is_quiet(device_t dev) 1339{ 1340 return ((dev->flags & DF_QUIET) != 0); 1341} 1342 1343int 1344device_is_enabled(device_t dev) 1345{ 1346 return ((dev->flags & DF_ENABLED) != 0); 1347} 1348 1349int 1350device_is_alive(device_t dev) 1351{ 1352 return (dev->state >= DS_ALIVE); 1353} 1354 1355int 1356device_set_devclass(device_t dev, const char *classname) 1357{ 1358 devclass_t dc; 1359 int error; 1360 1361 if (!classname) { 1362 if (dev->devclass) 1363 devclass_delete_device(dev->devclass, dev); 1364 return (0); 1365 } 1366 1367 if (dev->devclass) { 1368 printf("device_set_devclass: device class already set\n"); 1369 return (EINVAL); 1370 } 1371 1372 dc = devclass_find_internal(classname, TRUE); 1373 if (!dc) 1374 return (ENOMEM); 1375 1376 error = devclass_add_device(dc, dev); 1377 1378 bus_data_generation_update(); 1379 return (error); 1380} 1381 1382int 1383device_set_driver(device_t dev, driver_t *driver) 1384{ 1385 if (dev->state >= DS_ATTACHED) 1386 return (EBUSY); 1387 1388 if (dev->driver == driver) 1389 return (0); 1390 1391 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1392 free(dev->softc, M_BUS); 1393 dev->softc = NULL; 1394 } 1395 kobj_delete((kobj_t) dev, 0); 1396 dev->driver = driver; 1397 if (driver) { 1398 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1399 if (!(dev->flags & DF_EXTERNALSOFTC) && driver->size > 0) { 1400 dev->softc = malloc(driver->size, M_BUS, 1401 M_NOWAIT | M_ZERO); 1402 if (!dev->softc) { 1403 kobj_delete((kobj_t) dev, 0); 1404 kobj_init((kobj_t) dev, &null_class); 1405 dev->driver = NULL; 1406 return (ENOMEM); 1407 } 1408 } 1409 } else { 1410 kobj_init((kobj_t) dev, &null_class); 1411 } 1412 1413 bus_data_generation_update(); 1414 return (0); 1415} 1416 1417int 1418device_probe_and_attach(device_t dev) 1419{ 1420 device_t bus = dev->parent; 1421 int error = 0; 1422 int hasclass = (dev->devclass != 0); 1423 1424 if (dev->state >= DS_ALIVE) 1425 return (0); 1426 1427 if (dev->flags & DF_ENABLED) { 1428 error = device_probe_child(bus, dev); 1429 if (!error) { 1430 if (!device_is_quiet(dev)) 1431 device_print_child(bus, dev); 1432 error = DEVICE_ATTACH(dev); 1433 if (!error) { 1434 dev->state = DS_ATTACHED; 1435 devadded(dev); 1436 } else { 1437 printf("device_probe_and_attach: %s%d attach returned %d\n", 1438 dev->driver->name, dev->unit, error); 1439 /* Unset the class; set in device_probe_child */ 1440 if (!hasclass) 1441 device_set_devclass(dev, 0); 1442 device_set_driver(dev, NULL); 1443 dev->state = DS_NOTPRESENT; 1444 } 1445 } else { 1446 if (!(dev->flags & DF_DONENOMATCH)) { 1447 BUS_PROBE_NOMATCH(bus, dev); 1448 devnomatch(dev); 1449 dev->flags |= DF_DONENOMATCH; 1450 } 1451 } 1452 } else { 1453 if (bootverbose) { 1454 device_print_prettyname(dev); 1455 printf("not probed (disabled)\n"); 1456 } 1457 } 1458 1459 return (error); 1460} 1461 1462int 1463device_detach(device_t dev) 1464{ 1465 int error; 1466 1467 PDEBUG(("%s", DEVICENAME(dev))); 1468 if (dev->state == DS_BUSY) 1469 return (EBUSY); 1470 if (dev->state != DS_ATTACHED) 1471 return (0); 1472 1473 if ((error = DEVICE_DETACH(dev)) != 0) 1474 return (error); 1475 devremoved(dev); 1476 device_printf(dev, "detached\n"); 1477 if (dev->parent) 1478 BUS_CHILD_DETACHED(dev->parent, dev); 1479 1480 if (!(dev->flags & DF_FIXEDCLASS)) 1481 devclass_delete_device(dev->devclass, dev); 1482 1483 dev->state = DS_NOTPRESENT; 1484 device_set_driver(dev, NULL); 1485 1486 return (0); 1487} 1488 1489int 1490device_shutdown(device_t dev) 1491{ 1492 if (dev->state < DS_ATTACHED) 1493 return (0); 1494 return (DEVICE_SHUTDOWN(dev)); 1495} 1496 1497int 1498device_set_unit(device_t dev, int unit) 1499{ 1500 devclass_t dc; 1501 int err; 1502 1503 dc = device_get_devclass(dev); 1504 if (unit < dc->maxunit && dc->devices[unit]) 1505 return (EBUSY); 1506 err = devclass_delete_device(dc, dev); 1507 if (err) 1508 return (err); 1509 dev->unit = unit; 1510 err = devclass_add_device(dc, dev); 1511 if (err) 1512 return (err); 1513 1514 bus_data_generation_update(); 1515 return (0); 1516} 1517 1518/*======================================*/ 1519/* 1520 * Some useful method implementations to make life easier for bus drivers. 1521 */ 1522 1523void 1524resource_list_init(struct resource_list *rl) 1525{ 1526 SLIST_INIT(rl); 1527} 1528 1529void 1530resource_list_free(struct resource_list *rl) 1531{ 1532 struct resource_list_entry *rle; 1533 1534 while ((rle = SLIST_FIRST(rl)) != NULL) { 1535 if (rle->res) 1536 panic("resource_list_free: resource entry is busy"); 1537 SLIST_REMOVE_HEAD(rl, link); 1538 free(rle, M_BUS); 1539 } 1540} 1541 1542int 1543resource_list_add_next(struct resource_list *rl, int type, u_long start, 1544 u_long end, u_long count) 1545{ 1546 int rid; 1547 1548 rid = 0; 1549 while (resource_list_find(rl, type, rid) != NULL) 1550 rid++; 1551 resource_list_add(rl, type, rid, start, end, count); 1552 return (rid); 1553} 1554 1555void 1556resource_list_add(struct resource_list *rl, int type, int rid, 1557 u_long start, u_long end, u_long count) 1558{ 1559 struct resource_list_entry *rle; 1560 1561 rle = resource_list_find(rl, type, rid); 1562 if (!rle) { 1563 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1564 M_NOWAIT); 1565 if (!rle) 1566 panic("resource_list_add: can't record entry"); 1567 SLIST_INSERT_HEAD(rl, rle, link); 1568 rle->type = type; 1569 rle->rid = rid; 1570 rle->res = NULL; 1571 } 1572 1573 if (rle->res) 1574 panic("resource_list_add: resource entry is busy"); 1575 1576 rle->start = start; 1577 rle->end = end; 1578 rle->count = count; 1579} 1580 1581struct resource_list_entry * 1582resource_list_find(struct resource_list *rl, int type, int rid) 1583{ 1584 struct resource_list_entry *rle; 1585 1586 SLIST_FOREACH(rle, rl, link) { 1587 if (rle->type == type && rle->rid == rid) 1588 return (rle); 1589 } 1590 return (NULL); 1591} 1592 1593void 1594resource_list_delete(struct resource_list *rl, int type, int rid) 1595{ 1596 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1597 1598 if (rle) { 1599 if (rle->res != NULL) 1600 panic("resource_list_delete: resource has not been released"); 1601 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1602 free(rle, M_BUS); 1603 } 1604} 1605 1606struct resource * 1607resource_list_alloc(struct resource_list *rl, device_t bus, device_t child, 1608 int type, int *rid, u_long start, u_long end, u_long count, u_int flags) 1609{ 1610 struct resource_list_entry *rle = 0; 1611 int passthrough = (device_get_parent(child) != bus); 1612 int isdefault = (start == 0UL && end == ~0UL); 1613 1614 if (passthrough) { 1615 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1616 type, rid, start, end, count, flags)); 1617 } 1618 1619 rle = resource_list_find(rl, type, *rid); 1620 1621 if (!rle) 1622 return (NULL); /* no resource of that type/rid */ 1623 1624 if (rle->res) 1625 panic("resource_list_alloc: resource entry is busy"); 1626 1627 if (isdefault) { 1628 start = rle->start; 1629 count = ulmax(count, rle->count); 1630 end = ulmax(rle->end, start + count - 1); 1631 } 1632 1633 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1634 type, rid, start, end, count, flags); 1635 1636 /* 1637 * Record the new range. 1638 */ 1639 if (rle->res) { 1640 rle->start = rman_get_start(rle->res); 1641 rle->end = rman_get_end(rle->res); 1642 rle->count = count; 1643 } 1644 1645 return (rle->res); 1646} 1647 1648int 1649resource_list_release(struct resource_list *rl, device_t bus, device_t child, 1650 int type, int rid, struct resource *res) 1651{ 1652 struct resource_list_entry *rle = 0; 1653 int passthrough = (device_get_parent(child) != bus); 1654 int error; 1655 1656 if (passthrough) { 1657 return (BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1658 type, rid, res)); 1659 } 1660 1661 rle = resource_list_find(rl, type, rid); 1662 1663 if (!rle) 1664 panic("resource_list_release: can't find resource"); 1665 if (!rle->res) 1666 panic("resource_list_release: resource entry is not busy"); 1667 1668 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1669 type, rid, res); 1670 if (error) 1671 return (error); 1672 1673 rle->res = NULL; 1674 return (0); 1675} 1676 1677int 1678resource_list_print_type(struct resource_list *rl, const char *name, int type, 1679 const char *format) 1680{ 1681 struct resource_list_entry *rle; 1682 int printed, retval; 1683 1684 printed = 0; 1685 retval = 0; 1686 /* Yes, this is kinda cheating */ 1687 SLIST_FOREACH(rle, rl, link) { 1688 if (rle->type == type) { 1689 if (printed == 0) 1690 retval += printf(" %s ", name); 1691 else 1692 retval += printf(","); 1693 printed++; 1694 retval += printf(format, rle->start); 1695 if (rle->count > 1) { 1696 retval += printf("-"); 1697 retval += printf(format, rle->start + 1698 rle->count - 1); 1699 } 1700 } 1701 } 1702 return (retval); 1703} 1704 1705/* 1706 * Call DEVICE_IDENTIFY for each driver. 1707 */ 1708int 1709bus_generic_probe(device_t dev) 1710{ 1711 devclass_t dc = dev->devclass; 1712 driverlink_t dl; 1713 1714 TAILQ_FOREACH(dl, &dc->drivers, link) { 1715 DEVICE_IDENTIFY(dl->driver, dev); 1716 } 1717 1718 return (0); 1719} 1720 1721int 1722bus_generic_attach(device_t dev) 1723{ 1724 device_t child; 1725 1726 TAILQ_FOREACH(child, &dev->children, link) { 1727 device_probe_and_attach(child); 1728 } 1729 1730 return (0); 1731} 1732 1733int 1734bus_generic_detach(device_t dev) 1735{ 1736 device_t child; 1737 int error; 1738 1739 if (dev->state != DS_ATTACHED) 1740 return (EBUSY); 1741 1742 TAILQ_FOREACH(child, &dev->children, link) { 1743 if ((error = device_detach(child)) != 0) 1744 return (error); 1745 } 1746 1747 return (0); 1748} 1749 1750int 1751bus_generic_shutdown(device_t dev) 1752{ 1753 device_t child; 1754 1755 TAILQ_FOREACH(child, &dev->children, link) { 1756 device_shutdown(child); 1757 } 1758 1759 return (0); 1760} 1761 1762int 1763bus_generic_suspend(device_t dev) 1764{ 1765 int error; 1766 device_t child, child2; 1767 1768 TAILQ_FOREACH(child, &dev->children, link) { 1769 error = DEVICE_SUSPEND(child); 1770 if (error) { 1771 for (child2 = TAILQ_FIRST(&dev->children); 1772 child2 && child2 != child; 1773 child2 = TAILQ_NEXT(child2, link)) 1774 DEVICE_RESUME(child2); 1775 return (error); 1776 } 1777 } 1778 return (0); 1779} 1780 1781int 1782bus_generic_resume(device_t dev) 1783{ 1784 device_t child; 1785 1786 TAILQ_FOREACH(child, &dev->children, link) { 1787 DEVICE_RESUME(child); 1788 /* if resume fails, there's nothing we can usefully do... */ 1789 } 1790 return (0); 1791} 1792 1793int 1794bus_print_child_header (device_t dev, device_t child) 1795{ 1796 int retval = 0; 1797 1798 if (device_get_desc(child)) { 1799 retval += device_printf(child, "<%s>", device_get_desc(child)); 1800 } else { 1801 retval += printf("%s", device_get_nameunit(child)); 1802 } 1803 1804 return (retval); 1805} 1806 1807int 1808bus_print_child_footer (device_t dev, device_t child) 1809{ 1810 return (printf(" on %s\n", device_get_nameunit(dev))); 1811} 1812 1813int 1814bus_generic_print_child(device_t dev, device_t child) 1815{ 1816 int retval = 0; 1817 1818 retval += bus_print_child_header(dev, child); 1819 retval += bus_print_child_footer(dev, child); 1820 1821 return (retval); 1822} 1823 1824int 1825bus_generic_read_ivar(device_t dev, device_t child, int index, 1826 uintptr_t * result) 1827{ 1828 return (ENOENT); 1829} 1830 1831int 1832bus_generic_write_ivar(device_t dev, device_t child, int index, 1833 uintptr_t value) 1834{ 1835 return (ENOENT); 1836} 1837 1838struct resource_list * 1839bus_generic_get_resource_list (device_t dev, device_t child) 1840{ 1841 return (NULL); 1842} 1843 1844void 1845bus_generic_driver_added(device_t dev, driver_t *driver) 1846{ 1847 device_t child; 1848 1849 DEVICE_IDENTIFY(driver, dev); 1850 TAILQ_FOREACH(child, &dev->children, link) { 1851 if (child->state == DS_NOTPRESENT) 1852 device_probe_and_attach(child); 1853 } 1854} 1855 1856int 1857bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1858 int flags, driver_intr_t *intr, void *arg, void **cookiep) 1859{ 1860 /* Propagate up the bus hierarchy until someone handles it. */ 1861 if (dev->parent) 1862 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1863 intr, arg, cookiep)); 1864 return (EINVAL); 1865} 1866 1867int 1868bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1869 void *cookie) 1870{ 1871 /* Propagate up the bus hierarchy until someone handles it. */ 1872 if (dev->parent) 1873 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1874 return (EINVAL); 1875} 1876 1877struct resource * 1878bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1879 u_long start, u_long end, u_long count, u_int flags) 1880{ 1881 /* Propagate up the bus hierarchy until someone handles it. */ 1882 if (dev->parent) 1883 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1884 start, end, count, flags)); 1885 return (NULL); 1886} 1887 1888int 1889bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1890 struct resource *r) 1891{ 1892 /* Propagate up the bus hierarchy until someone handles it. */ 1893 if (dev->parent) 1894 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1895 r)); 1896 return (EINVAL); 1897} 1898 1899int 1900bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1901 struct resource *r) 1902{ 1903 /* Propagate up the bus hierarchy until someone handles it. */ 1904 if (dev->parent) 1905 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1906 r)); 1907 return (EINVAL); 1908} 1909 1910int 1911bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1912 int rid, struct resource *r) 1913{ 1914 /* Propagate up the bus hierarchy until someone handles it. */ 1915 if (dev->parent) 1916 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1917 r)); 1918 return (EINVAL); 1919} 1920 1921int 1922bus_generic_rl_get_resource (device_t dev, device_t child, int type, int rid, 1923 u_long *startp, u_long *countp) 1924{ 1925 struct resource_list * rl = NULL; 1926 struct resource_list_entry * rle = NULL; 1927 1928 rl = BUS_GET_RESOURCE_LIST(dev, child); 1929 if (!rl) 1930 return (EINVAL); 1931 1932 rle = resource_list_find(rl, type, rid); 1933 if (!rle) 1934 return (ENOENT); 1935 1936 if (startp) 1937 *startp = rle->start; 1938 if (countp) 1939 *countp = rle->count; 1940 1941 return (0); 1942} 1943 1944int 1945bus_generic_rl_set_resource (device_t dev, device_t child, int type, int rid, 1946 u_long start, u_long count) 1947{ 1948 struct resource_list * rl = NULL; 1949 1950 rl = BUS_GET_RESOURCE_LIST(dev, child); 1951 if (!rl) 1952 return (EINVAL); 1953 1954 resource_list_add(rl, type, rid, start, (start + count - 1), count); 1955 1956 return (0); 1957} 1958 1959void 1960bus_generic_rl_delete_resource (device_t dev, device_t child, int type, int rid) 1961{ 1962 struct resource_list * rl = NULL; 1963 1964 rl = BUS_GET_RESOURCE_LIST(dev, child); 1965 if (!rl) 1966 return; 1967 1968 resource_list_delete(rl, type, rid); 1969 1970 return; 1971} 1972 1973int 1974bus_generic_rl_release_resource (device_t dev, device_t child, int type, 1975 int rid, struct resource *r) 1976{ 1977 struct resource_list * rl = NULL; 1978 1979 rl = BUS_GET_RESOURCE_LIST(dev, child); 1980 if (!rl) 1981 return (EINVAL); 1982 1983 return (resource_list_release(rl, dev, child, type, rid, r)); 1984} 1985 1986struct resource * 1987bus_generic_rl_alloc_resource (device_t dev, device_t child, int type, 1988 int *rid, u_long start, u_long end, u_long count, u_int flags) 1989{ 1990 struct resource_list * rl = NULL; 1991 1992 rl = BUS_GET_RESOURCE_LIST(dev, child); 1993 if (!rl) 1994 return (NULL); 1995 1996 return (resource_list_alloc(rl, dev, child, type, rid, 1997 start, end, count, flags)); 1998} 1999 2000int 2001bus_generic_child_present(device_t bus, device_t child) 2002{ 2003 return (BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2004} 2005 2006/* 2007 * Some convenience functions to make it easier for drivers to use the 2008 * resource-management functions. All these really do is hide the 2009 * indirection through the parent's method table, making for slightly 2010 * less-wordy code. In the future, it might make sense for this code 2011 * to maintain some sort of a list of resources allocated by each device. 2012 */ 2013struct resource * 2014bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2015 u_long count, u_int flags) 2016{ 2017 if (dev->parent == 0) 2018 return (0); 2019 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2020 count, flags)); 2021} 2022 2023int 2024bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2025{ 2026 if (dev->parent == 0) 2027 return (EINVAL); 2028 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2029} 2030 2031int 2032bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2033{ 2034 if (dev->parent == 0) 2035 return (EINVAL); 2036 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2037} 2038 2039int 2040bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2041{ 2042 if (dev->parent == 0) 2043 return (EINVAL); 2044 return (BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2045} 2046 2047int 2048bus_setup_intr(device_t dev, struct resource *r, int flags, 2049 driver_intr_t handler, void *arg, void **cookiep) 2050{ 2051 if (dev->parent == 0) 2052 return (EINVAL); 2053 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 2054 handler, arg, cookiep)); 2055} 2056 2057int 2058bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2059{ 2060 if (dev->parent == 0) 2061 return (EINVAL); 2062 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2063} 2064 2065int 2066bus_set_resource(device_t dev, int type, int rid, 2067 u_long start, u_long count) 2068{ 2069 return (BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2070 start, count)); 2071} 2072 2073int 2074bus_get_resource(device_t dev, int type, int rid, 2075 u_long *startp, u_long *countp) 2076{ 2077 return (BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2078 startp, countp)); 2079} 2080 2081u_long 2082bus_get_resource_start(device_t dev, int type, int rid) 2083{ 2084 u_long start, count; 2085 int error; 2086 2087 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2088 &start, &count); 2089 if (error) 2090 return (0); 2091 return (start); 2092} 2093 2094u_long 2095bus_get_resource_count(device_t dev, int type, int rid) 2096{ 2097 u_long start, count; 2098 int error; 2099 2100 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2101 &start, &count); 2102 if (error) 2103 return (0); 2104 return (count); 2105} 2106 2107void 2108bus_delete_resource(device_t dev, int type, int rid) 2109{ 2110 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2111} 2112 2113int 2114bus_child_present(device_t child) 2115{ 2116 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2117} 2118 2119int 2120bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2121{ 2122 device_t parent; 2123 2124 parent = device_get_parent(child); 2125 if (parent == NULL) { 2126 *buf = '\0'; 2127 return (0); 2128 } 2129 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2130} 2131 2132int 2133bus_child_location_str(device_t child, char *buf, size_t buflen) 2134{ 2135 device_t parent; 2136 2137 parent = device_get_parent(child); 2138 if (parent == NULL) { 2139 *buf = '\0'; 2140 return (0); 2141 } 2142 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2143} 2144 2145static int 2146root_print_child(device_t dev, device_t child) 2147{ 2148 int retval = 0; 2149 2150 retval += bus_print_child_header(dev, child); 2151 retval += printf("\n"); 2152 2153 return (retval); 2154} 2155 2156static int 2157root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2158 void **cookiep) 2159{ 2160 /* 2161 * If an interrupt mapping gets to here something bad has happened. 2162 */ 2163 panic("root_setup_intr"); 2164} 2165 2166/* 2167 * If we get here, assume that the device is permanant and really is 2168 * present in the system. Removable bus drivers are expected to intercept 2169 * this call long before it gets here. We return -1 so that drivers that 2170 * really care can check vs -1 or some ERRNO returned higher in the food 2171 * chain. 2172 */ 2173static int 2174root_child_present(device_t dev, device_t child) 2175{ 2176 return (-1); 2177} 2178 2179static kobj_method_t root_methods[] = { 2180 /* Device interface */ 2181 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2182 KOBJMETHOD(device_suspend, bus_generic_suspend), 2183 KOBJMETHOD(device_resume, bus_generic_resume), 2184 2185 /* Bus interface */ 2186 KOBJMETHOD(bus_print_child, root_print_child), 2187 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2188 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2189 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2190 KOBJMETHOD(bus_child_present, root_child_present), 2191 2192 { 0, 0 } 2193}; 2194 2195static driver_t root_driver = { 2196 "root", 2197 root_methods, 2198 1, /* no softc */ 2199}; 2200 2201device_t root_bus; 2202devclass_t root_devclass; 2203 2204static int 2205root_bus_module_handler(module_t mod, int what, void* arg) 2206{ 2207 switch (what) { 2208 case MOD_LOAD: 2209 TAILQ_INIT(&bus_data_devices); 2210 kobj_class_compile((kobj_class_t) &root_driver); 2211 root_bus = make_device(NULL, "root", 0); 2212 root_bus->desc = "System root bus"; 2213 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2214 root_bus->driver = &root_driver; 2215 root_bus->state = DS_ATTACHED; 2216 root_devclass = devclass_find_internal("root", FALSE); 2217 devinit(); 2218 return (0); 2219 2220 case MOD_SHUTDOWN: 2221 device_shutdown(root_bus); 2222 return (0); 2223 } 2224 2225 return (0); 2226} 2227 2228static moduledata_t root_bus_mod = { 2229 "rootbus", 2230 root_bus_module_handler, 2231 0 2232}; 2233DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2234 2235void 2236root_bus_configure(void) 2237{ 2238 device_t dev; 2239 2240 PDEBUG((".")); 2241 2242 TAILQ_FOREACH(dev, &root_bus->children, link) { 2243 device_probe_and_attach(dev); 2244 } 2245} 2246 2247int 2248driver_module_handler(module_t mod, int what, void *arg) 2249{ 2250 int error, i; 2251 struct driver_module_data *dmd; 2252 devclass_t bus_devclass; 2253 2254 dmd = (struct driver_module_data *)arg; 2255 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2256 error = 0; 2257 2258 switch (what) { 2259 case MOD_LOAD: 2260 if (dmd->dmd_chainevh) 2261 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2262 2263 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2264 PDEBUG(("Loading module: driver %s on bus %s", 2265 DRIVERNAME(dmd->dmd_drivers[i]), dmd->dmd_busname)); 2266 error = devclass_add_driver(bus_devclass, 2267 dmd->dmd_drivers[i]); 2268 } 2269 if (error) 2270 break; 2271 2272 /* 2273 * The drivers loaded in this way are assumed to all 2274 * implement the same devclass. 2275 */ 2276 *dmd->dmd_devclass = 2277 devclass_find_internal(dmd->dmd_drivers[0]->name, TRUE); 2278 break; 2279 2280 case MOD_UNLOAD: 2281 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2282 PDEBUG(("Unloading module: driver %s from bus %s", 2283 DRIVERNAME(dmd->dmd_drivers[i]), 2284 dmd->dmd_busname)); 2285 error = devclass_delete_driver(bus_devclass, 2286 dmd->dmd_drivers[i]); 2287 } 2288 2289 if (!error && dmd->dmd_chainevh) 2290 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2291 break; 2292 } 2293 2294 return (error); 2295} 2296 2297#ifdef BUS_DEBUG 2298 2299/* the _short versions avoid iteration by not calling anything that prints 2300 * more than oneliners. I love oneliners. 2301 */ 2302 2303static void 2304print_device_short(device_t dev, int indent) 2305{ 2306 if (!dev) 2307 return; 2308 2309 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2310 dev->unit, dev->desc, 2311 (dev->parent? "":"no "), 2312 (TAILQ_EMPTY(&dev->children)? "no ":""), 2313 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2314 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2315 (dev->flags&DF_WILDCARD? "wildcard,":""), 2316 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2317 (dev->ivars? "":"no "), 2318 (dev->softc? "":"no "), 2319 dev->busy)); 2320} 2321 2322static void 2323print_device(device_t dev, int indent) 2324{ 2325 if (!dev) 2326 return; 2327 2328 print_device_short(dev, indent); 2329 2330 indentprintf(("Parent:\n")); 2331 print_device_short(dev->parent, indent+1); 2332 indentprintf(("Driver:\n")); 2333 print_driver_short(dev->driver, indent+1); 2334 indentprintf(("Devclass:\n")); 2335 print_devclass_short(dev->devclass, indent+1); 2336} 2337 2338void 2339print_device_tree_short(device_t dev, int indent) 2340/* print the device and all its children (indented) */ 2341{ 2342 device_t child; 2343 2344 if (!dev) 2345 return; 2346 2347 print_device_short(dev, indent); 2348 2349 TAILQ_FOREACH(child, &dev->children, link) { 2350 print_device_tree_short(child, indent+1); 2351 } 2352} 2353 2354void 2355print_device_tree(device_t dev, int indent) 2356/* print the device and all its children (indented) */ 2357{ 2358 device_t child; 2359 2360 if (!dev) 2361 return; 2362 2363 print_device(dev, indent); 2364 2365 TAILQ_FOREACH(child, &dev->children, link) { 2366 print_device_tree(child, indent+1); 2367 } 2368} 2369 2370static void 2371print_driver_short(driver_t *driver, int indent) 2372{ 2373 if (!driver) 2374 return; 2375 2376 indentprintf(("driver %s: softc size = %zd\n", 2377 driver->name, driver->size)); 2378} 2379 2380static void 2381print_driver(driver_t *driver, int indent) 2382{ 2383 if (!driver) 2384 return; 2385 2386 print_driver_short(driver, indent); 2387} 2388 2389 2390static void 2391print_driver_list(driver_list_t drivers, int indent) 2392{ 2393 driverlink_t driver; 2394 2395 TAILQ_FOREACH(driver, &drivers, link) { 2396 print_driver(driver->driver, indent); 2397 } 2398} 2399 2400static void 2401print_devclass_short(devclass_t dc, int indent) 2402{ 2403 if ( !dc ) 2404 return; 2405 2406 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2407} 2408 2409static void 2410print_devclass(devclass_t dc, int indent) 2411{ 2412 int i; 2413 2414 if ( !dc ) 2415 return; 2416 2417 print_devclass_short(dc, indent); 2418 indentprintf(("Drivers:\n")); 2419 print_driver_list(dc->drivers, indent+1); 2420 2421 indentprintf(("Devices:\n")); 2422 for (i = 0; i < dc->maxunit; i++) 2423 if (dc->devices[i]) 2424 print_device(dc->devices[i], indent+1); 2425} 2426 2427void 2428print_devclass_list_short(void) 2429{ 2430 devclass_t dc; 2431 2432 printf("Short listing of devclasses, drivers & devices:\n"); 2433 TAILQ_FOREACH(dc, &devclasses, link) { 2434 print_devclass_short(dc, 0); 2435 } 2436} 2437 2438void 2439print_devclass_list(void) 2440{ 2441 devclass_t dc; 2442 2443 printf("Full listing of devclasses, drivers & devices:\n"); 2444 TAILQ_FOREACH(dc, &devclasses, link) { 2445 print_devclass(dc, 0); 2446 } 2447} 2448 2449#endif 2450 2451/* 2452 * User-space access to the device tree. 2453 * 2454 * We implement a small set of nodes: 2455 * 2456 * hw.bus Single integer read method to obtain the 2457 * current generation count. 2458 * hw.bus.devices Reads the entire device tree in flat space. 2459 * hw.bus.rman Resource manager interface 2460 * 2461 * We might like to add the ability to scan devclasses and/or drivers to 2462 * determine what else is currently loaded/available. 2463 */ 2464 2465static int 2466sysctl_bus(SYSCTL_HANDLER_ARGS) 2467{ 2468 struct u_businfo ubus; 2469 2470 ubus.ub_version = BUS_USER_VERSION; 2471 ubus.ub_generation = bus_data_generation; 2472 2473 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 2474} 2475SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 2476 "bus-related data"); 2477 2478static int 2479sysctl_devices(SYSCTL_HANDLER_ARGS) 2480{ 2481 int *name = (int *)arg1; 2482 u_int namelen = arg2; 2483 int index; 2484 struct device *dev; 2485 struct u_device udev; /* XXX this is a bit big */ 2486 int error; 2487 2488 if (namelen != 2) 2489 return (EINVAL); 2490 2491 if (bus_data_generation_check(name[0])) 2492 return (EINVAL); 2493 2494 index = name[1]; 2495 2496 /* 2497 * Scan the list of devices, looking for the requested index. 2498 */ 2499 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 2500 if (index-- == 0) 2501 break; 2502 } 2503 if (dev == NULL) 2504 return (ENOENT); 2505 2506 /* 2507 * Populate the return array. 2508 */ 2509 udev.dv_handle = (uintptr_t)dev; 2510 udev.dv_parent = (uintptr_t)dev->parent; 2511 if (dev->nameunit == NULL) 2512 udev.dv_name[0] = '\0'; 2513 else 2514 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 2515 2516 if (dev->desc == NULL) 2517 udev.dv_desc[0] = '\0'; 2518 else 2519 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 2520 if (dev->driver == NULL || dev->driver->name == NULL) 2521 udev.dv_drivername[0] = '\0'; 2522 else 2523 strlcpy(udev.dv_drivername, dev->driver->name, 2524 sizeof(udev.dv_drivername)); 2525 udev.dv_pnpinfo[0] = '\0'; 2526 udev.dv_location[0] = '\0'; 2527 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 2528 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 2529 udev.dv_devflags = dev->devflags; 2530 udev.dv_flags = dev->flags; 2531 udev.dv_state = dev->state; 2532 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 2533 return (error); 2534} 2535 2536SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 2537 "system device tree"); 2538 2539/* 2540 * Sysctl interface for scanning the resource lists. 2541 * 2542 * We take two input parameters; the index into the list of resource 2543 * managers, and the resource offset into the list. 2544 */ 2545static int 2546sysctl_rman(SYSCTL_HANDLER_ARGS) 2547{ 2548 int *name = (int *)arg1; 2549 u_int namelen = arg2; 2550 int rman_idx, res_idx; 2551 struct rman *rm; 2552 struct resource *res; 2553 struct u_rman urm; 2554 struct u_resource ures; 2555 int error; 2556 2557 if (namelen != 3) 2558 return (EINVAL); 2559 2560 if (bus_data_generation_check(name[0])) 2561 return (EINVAL); 2562 rman_idx = name[1]; 2563 res_idx = name[2]; 2564 2565 /* 2566 * Find the indexed resource manager 2567 */ 2568 TAILQ_FOREACH(rm, &rman_head, rm_link) { 2569 if (rman_idx-- == 0) 2570 break; 2571 } 2572 if (rm == NULL) 2573 return (ENOENT); 2574 2575 /* 2576 * If the resource index is -1, we want details on the 2577 * resource manager. 2578 */ 2579 if (res_idx == -1) { 2580 urm.rm_handle = (uintptr_t)rm; 2581 strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN); 2582 urm.rm_start = rm->rm_start; 2583 urm.rm_size = rm->rm_end - rm->rm_start + 1; 2584 urm.rm_type = rm->rm_type; 2585 2586 error = SYSCTL_OUT(req, &urm, sizeof(urm)); 2587 return (error); 2588 } 2589 2590 /* 2591 * Find the indexed resource and return it. 2592 */ 2593 TAILQ_FOREACH(res, &rm->rm_list, r_link) { 2594 if (res_idx-- == 0) { 2595 ures.r_handle = (uintptr_t)res; 2596 ures.r_parent = (uintptr_t)res->r_rm; 2597 ures.r_device = (uintptr_t)res->r_dev; 2598 if (res->r_dev != NULL) { 2599 if (device_get_name(res->r_dev) != NULL) { 2600 snprintf(ures.r_devname, RM_TEXTLEN, 2601 "%s%d", 2602 device_get_name(res->r_dev), 2603 device_get_unit(res->r_dev)); 2604 } else { 2605 strlcpy(ures.r_devname, "nomatch", 2606 RM_TEXTLEN); 2607 } 2608 } else { 2609 ures.r_devname[0] = '\0'; 2610 } 2611 ures.r_start = res->r_start; 2612 ures.r_size = res->r_end - res->r_start + 1; 2613 ures.r_flags = res->r_flags; 2614 2615 error = SYSCTL_OUT(req, &ures, sizeof(ures)); 2616 return (error); 2617 } 2618 } 2619 return (ENOENT); 2620} 2621 2622SYSCTL_NODE(_hw_bus, OID_AUTO, rman, CTLFLAG_RD, sysctl_rman, 2623 "kernel resource manager"); 2624 2625int 2626bus_data_generation_check(int generation) 2627{ 2628 if (generation != bus_data_generation) 2629 return (1); 2630 2631 /* XXX generate optimised lists here? */ 2632 return (0); 2633} 2634 2635void 2636bus_data_generation_update(void) 2637{ 2638 bus_data_generation++; 2639} 2640