Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_bus.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 1997,1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: releng/5.1/sys/kern/subr_bus.c 114293 2003-04-30 12:57:40Z markm $ 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 57 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 58 59 /* 60 * Used to attach drivers to devclasses. 61 */ 62 typedef struct driverlink *driverlink_t; 63 struct driverlink { 64 driver_t *driver; 65 TAILQ_ENTRY(driverlink) link; /* list of drivers in devclass */ 66 }; 67 68 /* 69 * Forward declarations 70 */ 71 typedef TAILQ_HEAD(devclass_list, devclass) devclass_list_t; 72 typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t; 73 typedef TAILQ_HEAD(device_list, device) device_list_t; 74 75 struct 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 */ 86 struct 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 }; 125 126 struct 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 }; 132 133 static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 134 135 #ifdef BUS_DEBUG 136 137 static int bus_debug = 1; 138 TUNABLE_INT("bus.debug", &bus_debug); 139 SYSCTL_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) 151 152 static void print_device_short(device_t dev, int indent); 153 static void print_device(device_t dev, int indent); 154 void print_device_tree_short(device_t dev, int indent); 155 void print_device_tree(device_t dev, int indent); 156 static void print_driver_short(driver_t *driver, int indent); 157 static void print_driver(driver_t *driver, int indent); 158 static void print_driver_list(driver_list_t drivers, int indent); 159 static void print_devclass_short(devclass_t dc, int indent); 160 static void print_devclass(devclass_t dc, int indent); 161 void print_devclass_list_short(void); 162 void 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 */ 204 205 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 206 static int devctl_disable = 0; 207 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 208 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, 209 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_devctl_disable, 210 "I", "devctl disable"); 211 212 static d_open_t devopen; 213 static d_close_t devclose; 214 static d_read_t devread; 215 static d_ioctl_t devioctl; 216 static d_poll_t devpoll; 217 218 #define CDEV_MAJOR 173 219 static 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 }; 228 229 struct dev_event_info 230 { 231 char *dei_data; 232 TAILQ_ENTRY(dev_event_info) dei_link; 233 }; 234 235 TAILQ_HEAD(devq, dev_event_info); 236 237 static struct 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; 247 248 static dev_t devctl_dev; 249 250 static void 251 devinit(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 } 259 260 static int 261 devopen(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 } 271 272 static int 273 devclose(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 */ 291 static int 292 devread(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 } 320 321 static int 322 devioctl(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 } 350 351 static int 352 devpoll(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 */ 376 static void 377 devaddq(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; 417 bad:; 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 */ 430 static void 431 devadded(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 */ 440 static void 441 devremoved(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 */ 453 static void 454 devnomatch(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 } 467 468 static int 469 sysctl_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 */ 493 494 TAILQ_HEAD(,device) bus_data_devices; 495 static int bus_data_generation = 1; 496 497 kobj_method_t null_methods[] = { 498 { 0, 0 } 499 }; 500 501 DEFINE_CLASS(null, null_methods, 0); 502 503 /* 504 * Devclass implementation 505 */ 506 507 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 508 509 static devclass_t 510 devclass_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 } 539 540 devclass_t 541 devclass_create(const char *classname) 542 { 543 return (devclass_find_internal(classname, TRUE)); 544 } 545 546 devclass_t 547 devclass_find(const char *classname) 548 { 549 return (devclass_find_internal(classname, FALSE)); 550 } 551 552 int 553 devclass_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 } 591 592 int 593 devclass_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 } 652 653 static driverlink_t 654 devclass_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 } 668 669 driver_t * 670 devclass_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 } 679 680 const char * 681 devclass_get_name(devclass_t dc) 682 { 683 return (dc->name); 684 } 685 686 device_t 687 devclass_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 } 693 694 void * 695 devclass_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 } 705 706 int 707 devclass_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 } 735 736 int 737 devclass_get_maxunit(devclass_t dc) 738 { 739 return (dc->maxunit); 740 } 741 742 int 743 devclass_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 } 751 752 static int 753 devclass_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 } 802 803 static int 804 devclass_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 } 828 829 static int 830 devclass_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 } 848 849 static device_t 850 make_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 } 903 904 static int 905 device_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 } 916 917 device_t 918 device_add_child(device_t dev, const char *name, int unit) 919 { 920 return (device_add_child_ordered(dev, 0, name, unit)); 921 } 922 923 device_t 924 device_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 } 959 960 int 961 device_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 */ 991 device_t 992 device_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 1007 static driverlink_t 1008 first_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 1015 static driverlink_t 1016 next_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 1028 static int 1029 device_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 1107 device_t 1108 device_get_parent(device_t dev) 1109 { 1110 return (dev->parent); 1111 } 1112 1113 int 1114 device_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 1141 driver_t * 1142 device_get_driver(device_t dev) 1143 { 1144 return (dev->driver); 1145 } 1146 1147 devclass_t 1148 device_get_devclass(device_t dev) 1149 { 1150 return (dev->devclass); 1151 } 1152 1153 const char * 1154 device_get_name(device_t dev) 1155 { 1156 if (dev != NULL && dev->devclass) 1157 return (devclass_get_name(dev->devclass)); 1158 return (NULL); 1159 } 1160 1161 const char * 1162 device_get_nameunit(device_t dev) 1163 { 1164 return (dev->nameunit); 1165 } 1166 1167 int 1168 device_get_unit(device_t dev) 1169 { 1170 return (dev->unit); 1171 } 1172 1173 const char * 1174 device_get_desc(device_t dev) 1175 { 1176 return (dev->desc); 1177 } 1178 1179 u_int32_t 1180 device_get_flags(device_t dev) 1181 { 1182 return (dev->devflags); 1183 } 1184 1185 int 1186 device_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 1195 int 1196 device_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 1208 static void 1209 device_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 1231 void 1232 device_set_desc(device_t dev, const char* desc) 1233 { 1234 device_set_desc_internal(dev, desc, FALSE); 1235 } 1236 1237 void 1238 device_set_desc_copy(device_t dev, const char* desc) 1239 { 1240 device_set_desc_internal(dev, desc, TRUE); 1241 } 1242 1243 void 1244 device_set_flags(device_t dev, u_int32_t flags) 1245 { 1246 dev->devflags = flags; 1247 } 1248 1249 void * 1250 device_get_softc(device_t dev) 1251 { 1252 return (dev->softc); 1253 } 1254 1255 void 1256 device_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 1267 void * 1268 device_get_ivars(device_t dev) 1269 { 1270 1271 KASSERT(dev != NULL, ("device_get_ivars(NULL, ...)")); 1272 return (dev->ivars); 1273 } 1274 1275 void 1276 device_set_ivars(device_t dev, void * ivars) 1277 { 1278 1279 KASSERT(dev != NULL, ("device_set_ivars(NULL, ...)")); 1280 dev->ivars = ivars; 1281 } 1282 1283 device_state_t 1284 device_get_state(device_t dev) 1285 { 1286 return (dev->state); 1287 } 1288 1289 void 1290 device_enable(device_t dev) 1291 { 1292 dev->flags |= DF_ENABLED; 1293 } 1294 1295 void 1296 device_disable(device_t dev) 1297 { 1298 dev->flags &= ~DF_ENABLED; 1299 } 1300 1301 void 1302 device_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 1312 void 1313 device_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 1325 void 1326 device_quiet(device_t dev) 1327 { 1328 dev->flags |= DF_QUIET; 1329 } 1330 1331 void 1332 device_verbose(device_t dev) 1333 { 1334 dev->flags &= ~DF_QUIET; 1335 } 1336 1337 int 1338 device_is_quiet(device_t dev) 1339 { 1340 return ((dev->flags & DF_QUIET) != 0); 1341 } 1342 1343 int 1344 device_is_enabled(device_t dev) 1345 { 1346 return ((dev->flags & DF_ENABLED) != 0); 1347 } 1348 1349 int 1350 device_is_alive(device_t dev) 1351 { 1352 return (dev->state >= DS_ALIVE); 1353 } 1354 1355 int 1356 device_is_attached(device_t dev) 1357 { 1358 return (dev->state >= DS_ATTACHED); 1359 } 1360 1361 int 1362 device_set_devclass(device_t dev, const char *classname) 1363 { 1364 devclass_t dc; 1365 int error; 1366 1367 if (!classname) { 1368 if (dev->devclass) 1369 devclass_delete_device(dev->devclass, dev); 1370 return (0); 1371 } 1372 1373 if (dev->devclass) { 1374 printf("device_set_devclass: device class already set\n"); 1375 return (EINVAL); 1376 } 1377 1378 dc = devclass_find_internal(classname, TRUE); 1379 if (!dc) 1380 return (ENOMEM); 1381 1382 error = devclass_add_device(dc, dev); 1383 1384 bus_data_generation_update(); 1385 return (error); 1386 } 1387 1388 int 1389 device_set_driver(device_t dev, driver_t *driver) 1390 { 1391 if (dev->state >= DS_ATTACHED) 1392 return (EBUSY); 1393 1394 if (dev->driver == driver) 1395 return (0); 1396 1397 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1398 free(dev->softc, M_BUS); 1399 dev->softc = NULL; 1400 } 1401 kobj_delete((kobj_t) dev, 0); 1402 dev->driver = driver; 1403 if (driver) { 1404 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1405 if (!(dev->flags & DF_EXTERNALSOFTC) && driver->size > 0) { 1406 dev->softc = malloc(driver->size, M_BUS, 1407 M_NOWAIT | M_ZERO); 1408 if (!dev->softc) { 1409 kobj_delete((kobj_t) dev, 0); 1410 kobj_init((kobj_t) dev, &null_class); 1411 dev->driver = NULL; 1412 return (ENOMEM); 1413 } 1414 } 1415 } else { 1416 kobj_init((kobj_t) dev, &null_class); 1417 } 1418 1419 bus_data_generation_update(); 1420 return (0); 1421 } 1422 1423 int 1424 device_probe_and_attach(device_t dev) 1425 { 1426 device_t bus = dev->parent; 1427 int error = 0; 1428 int hasclass = (dev->devclass != 0); 1429 1430 if (dev->state >= DS_ALIVE) 1431 return (0); 1432 1433 if (dev->flags & DF_ENABLED) { 1434 error = device_probe_child(bus, dev); 1435 if (!error) { 1436 if (!device_is_quiet(dev)) 1437 device_print_child(bus, dev); 1438 error = DEVICE_ATTACH(dev); 1439 if (!error) { 1440 dev->state = DS_ATTACHED; 1441 devadded(dev); 1442 } else { 1443 printf("device_probe_and_attach: %s%d attach returned %d\n", 1444 dev->driver->name, dev->unit, error); 1445 /* Unset the class; set in device_probe_child */ 1446 if (!hasclass) 1447 device_set_devclass(dev, 0); 1448 device_set_driver(dev, NULL); 1449 dev->state = DS_NOTPRESENT; 1450 } 1451 } else { 1452 if (!(dev->flags & DF_DONENOMATCH)) { 1453 BUS_PROBE_NOMATCH(bus, dev); 1454 devnomatch(dev); 1455 dev->flags |= DF_DONENOMATCH; 1456 } 1457 } 1458 } else { 1459 if (bootverbose) { 1460 device_print_prettyname(dev); 1461 printf("not probed (disabled)\n"); 1462 } 1463 } 1464 1465 return (error); 1466 } 1467 1468 int 1469 device_detach(device_t dev) 1470 { 1471 int error; 1472 1473 PDEBUG(("%s", DEVICENAME(dev))); 1474 if (dev->state == DS_BUSY) 1475 return (EBUSY); 1476 if (dev->state != DS_ATTACHED) 1477 return (0); 1478 1479 if ((error = DEVICE_DETACH(dev)) != 0) 1480 return (error); 1481 devremoved(dev); 1482 device_printf(dev, "detached\n"); 1483 if (dev->parent) 1484 BUS_CHILD_DETACHED(dev->parent, dev); 1485 1486 if (!(dev->flags & DF_FIXEDCLASS)) 1487 devclass_delete_device(dev->devclass, dev); 1488 1489 dev->state = DS_NOTPRESENT; 1490 device_set_driver(dev, NULL); 1491 1492 return (0); 1493 } 1494 1495 int 1496 device_shutdown(device_t dev) 1497 { 1498 if (dev->state < DS_ATTACHED) 1499 return (0); 1500 return (DEVICE_SHUTDOWN(dev)); 1501 } 1502 1503 int 1504 device_set_unit(device_t dev, int unit) 1505 { 1506 devclass_t dc; 1507 int err; 1508 1509 dc = device_get_devclass(dev); 1510 if (unit < dc->maxunit && dc->devices[unit]) 1511 return (EBUSY); 1512 err = devclass_delete_device(dc, dev); 1513 if (err) 1514 return (err); 1515 dev->unit = unit; 1516 err = devclass_add_device(dc, dev); 1517 if (err) 1518 return (err); 1519 1520 bus_data_generation_update(); 1521 return (0); 1522 } 1523 1524 /*======================================*/ 1525 /* 1526 * Some useful method implementations to make life easier for bus drivers. 1527 */ 1528 1529 void 1530 resource_list_init(struct resource_list *rl) 1531 { 1532 SLIST_INIT(rl); 1533 } 1534 1535 void 1536 resource_list_free(struct resource_list *rl) 1537 { 1538 struct resource_list_entry *rle; 1539 1540 while ((rle = SLIST_FIRST(rl)) != NULL) { 1541 if (rle->res) 1542 panic("resource_list_free: resource entry is busy"); 1543 SLIST_REMOVE_HEAD(rl, link); 1544 free(rle, M_BUS); 1545 } 1546 } 1547 1548 int 1549 resource_list_add_next(struct resource_list *rl, int type, u_long start, 1550 u_long end, u_long count) 1551 { 1552 int rid; 1553 1554 rid = 0; 1555 while (resource_list_find(rl, type, rid) != NULL) 1556 rid++; 1557 resource_list_add(rl, type, rid, start, end, count); 1558 return (rid); 1559 } 1560 1561 void 1562 resource_list_add(struct resource_list *rl, int type, int rid, 1563 u_long start, u_long end, u_long count) 1564 { 1565 struct resource_list_entry *rle; 1566 1567 rle = resource_list_find(rl, type, rid); 1568 if (!rle) { 1569 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1570 M_NOWAIT); 1571 if (!rle) 1572 panic("resource_list_add: can't record entry"); 1573 SLIST_INSERT_HEAD(rl, rle, link); 1574 rle->type = type; 1575 rle->rid = rid; 1576 rle->res = NULL; 1577 } 1578 1579 if (rle->res) 1580 panic("resource_list_add: resource entry is busy"); 1581 1582 rle->start = start; 1583 rle->end = end; 1584 rle->count = count; 1585 } 1586 1587 struct resource_list_entry * 1588 resource_list_find(struct resource_list *rl, int type, int rid) 1589 { 1590 struct resource_list_entry *rle; 1591 1592 SLIST_FOREACH(rle, rl, link) { 1593 if (rle->type == type && rle->rid == rid) 1594 return (rle); 1595 } 1596 return (NULL); 1597 } 1598 1599 void 1600 resource_list_delete(struct resource_list *rl, int type, int rid) 1601 { 1602 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1603 1604 if (rle) { 1605 if (rle->res != NULL) 1606 panic("resource_list_delete: resource has not been released"); 1607 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1608 free(rle, M_BUS); 1609 } 1610 } 1611 1612 struct resource * 1613 resource_list_alloc(struct resource_list *rl, device_t bus, device_t child, 1614 int type, int *rid, u_long start, u_long end, u_long count, u_int flags) 1615 { 1616 struct resource_list_entry *rle = 0; 1617 int passthrough = (device_get_parent(child) != bus); 1618 int isdefault = (start == 0UL && end == ~0UL); 1619 1620 if (passthrough) { 1621 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1622 type, rid, start, end, count, flags)); 1623 } 1624 1625 rle = resource_list_find(rl, type, *rid); 1626 1627 if (!rle) 1628 return (NULL); /* no resource of that type/rid */ 1629 1630 if (rle->res) 1631 panic("resource_list_alloc: resource entry is busy"); 1632 1633 if (isdefault) { 1634 start = rle->start; 1635 count = ulmax(count, rle->count); 1636 end = ulmax(rle->end, start + count - 1); 1637 } 1638 1639 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1640 type, rid, start, end, count, flags); 1641 1642 /* 1643 * Record the new range. 1644 */ 1645 if (rle->res) { 1646 rle->start = rman_get_start(rle->res); 1647 rle->end = rman_get_end(rle->res); 1648 rle->count = count; 1649 } 1650 1651 return (rle->res); 1652 } 1653 1654 int 1655 resource_list_release(struct resource_list *rl, device_t bus, device_t child, 1656 int type, int rid, struct resource *res) 1657 { 1658 struct resource_list_entry *rle = 0; 1659 int passthrough = (device_get_parent(child) != bus); 1660 int error; 1661 1662 if (passthrough) { 1663 return (BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1664 type, rid, res)); 1665 } 1666 1667 rle = resource_list_find(rl, type, rid); 1668 1669 if (!rle) 1670 panic("resource_list_release: can't find resource"); 1671 if (!rle->res) 1672 panic("resource_list_release: resource entry is not busy"); 1673 1674 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1675 type, rid, res); 1676 if (error) 1677 return (error); 1678 1679 rle->res = NULL; 1680 return (0); 1681 } 1682 1683 int 1684 resource_list_print_type(struct resource_list *rl, const char *name, int type, 1685 const char *format) 1686 { 1687 struct resource_list_entry *rle; 1688 int printed, retval; 1689 1690 printed = 0; 1691 retval = 0; 1692 /* Yes, this is kinda cheating */ 1693 SLIST_FOREACH(rle, rl, link) { 1694 if (rle->type == type) { 1695 if (printed == 0) 1696 retval += printf(" %s ", name); 1697 else 1698 retval += printf(","); 1699 printed++; 1700 retval += printf(format, rle->start); 1701 if (rle->count > 1) { 1702 retval += printf("-"); 1703 retval += printf(format, rle->start + 1704 rle->count - 1); 1705 } 1706 } 1707 } 1708 return (retval); 1709 } 1710 1711 /* 1712 * Call DEVICE_IDENTIFY for each driver. 1713 */ 1714 int 1715 bus_generic_probe(device_t dev) 1716 { 1717 devclass_t dc = dev->devclass; 1718 driverlink_t dl; 1719 1720 TAILQ_FOREACH(dl, &dc->drivers, link) { 1721 DEVICE_IDENTIFY(dl->driver, dev); 1722 } 1723 1724 return (0); 1725 } 1726 1727 int 1728 bus_generic_attach(device_t dev) 1729 { 1730 device_t child; 1731 1732 TAILQ_FOREACH(child, &dev->children, link) { 1733 device_probe_and_attach(child); 1734 } 1735 1736 return (0); 1737 } 1738 1739 int 1740 bus_generic_detach(device_t dev) 1741 { 1742 device_t child; 1743 int error; 1744 1745 if (dev->state != DS_ATTACHED) 1746 return (EBUSY); 1747 1748 TAILQ_FOREACH(child, &dev->children, link) { 1749 if ((error = device_detach(child)) != 0) 1750 return (error); 1751 } 1752 1753 return (0); 1754 } 1755 1756 int 1757 bus_generic_shutdown(device_t dev) 1758 { 1759 device_t child; 1760 1761 TAILQ_FOREACH(child, &dev->children, link) { 1762 device_shutdown(child); 1763 } 1764 1765 return (0); 1766 } 1767 1768 int 1769 bus_generic_suspend(device_t dev) 1770 { 1771 int error; 1772 device_t child, child2; 1773 1774 TAILQ_FOREACH(child, &dev->children, link) { 1775 error = DEVICE_SUSPEND(child); 1776 if (error) { 1777 for (child2 = TAILQ_FIRST(&dev->children); 1778 child2 && child2 != child; 1779 child2 = TAILQ_NEXT(child2, link)) 1780 DEVICE_RESUME(child2); 1781 return (error); 1782 } 1783 } 1784 return (0); 1785 } 1786 1787 int 1788 bus_generic_resume(device_t dev) 1789 { 1790 device_t child; 1791 1792 TAILQ_FOREACH(child, &dev->children, link) { 1793 DEVICE_RESUME(child); 1794 /* if resume fails, there's nothing we can usefully do... */ 1795 } 1796 return (0); 1797 } 1798 1799 int 1800 bus_print_child_header (device_t dev, device_t child) 1801 { 1802 int retval = 0; 1803 1804 if (device_get_desc(child)) { 1805 retval += device_printf(child, "<%s>", device_get_desc(child)); 1806 } else { 1807 retval += printf("%s", device_get_nameunit(child)); 1808 } 1809 1810 return (retval); 1811 } 1812 1813 int 1814 bus_print_child_footer (device_t dev, device_t child) 1815 { 1816 return (printf(" on %s\n", device_get_nameunit(dev))); 1817 } 1818 1819 int 1820 bus_generic_print_child(device_t dev, device_t child) 1821 { 1822 int retval = 0; 1823 1824 retval += bus_print_child_header(dev, child); 1825 retval += bus_print_child_footer(dev, child); 1826 1827 return (retval); 1828 } 1829 1830 int 1831 bus_generic_read_ivar(device_t dev, device_t child, int index, 1832 uintptr_t * result) 1833 { 1834 return (ENOENT); 1835 } 1836 1837 int 1838 bus_generic_write_ivar(device_t dev, device_t child, int index, 1839 uintptr_t value) 1840 { 1841 return (ENOENT); 1842 } 1843 1844 struct resource_list * 1845 bus_generic_get_resource_list (device_t dev, device_t child) 1846 { 1847 return (NULL); 1848 } 1849 1850 void 1851 bus_generic_driver_added(device_t dev, driver_t *driver) 1852 { 1853 device_t child; 1854 1855 DEVICE_IDENTIFY(driver, dev); 1856 TAILQ_FOREACH(child, &dev->children, link) { 1857 if (child->state == DS_NOTPRESENT) 1858 device_probe_and_attach(child); 1859 } 1860 } 1861 1862 int 1863 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1864 int flags, driver_intr_t *intr, void *arg, void **cookiep) 1865 { 1866 /* Propagate up the bus hierarchy until someone handles it. */ 1867 if (dev->parent) 1868 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1869 intr, arg, cookiep)); 1870 return (EINVAL); 1871 } 1872 1873 int 1874 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1875 void *cookie) 1876 { 1877 /* Propagate up the bus hierarchy until someone handles it. */ 1878 if (dev->parent) 1879 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1880 return (EINVAL); 1881 } 1882 1883 struct resource * 1884 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1885 u_long start, u_long end, u_long count, u_int flags) 1886 { 1887 /* Propagate up the bus hierarchy until someone handles it. */ 1888 if (dev->parent) 1889 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1890 start, end, count, flags)); 1891 return (NULL); 1892 } 1893 1894 int 1895 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1896 struct resource *r) 1897 { 1898 /* Propagate up the bus hierarchy until someone handles it. */ 1899 if (dev->parent) 1900 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1901 r)); 1902 return (EINVAL); 1903 } 1904 1905 int 1906 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1907 struct resource *r) 1908 { 1909 /* Propagate up the bus hierarchy until someone handles it. */ 1910 if (dev->parent) 1911 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1912 r)); 1913 return (EINVAL); 1914 } 1915 1916 int 1917 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1918 int rid, struct resource *r) 1919 { 1920 /* Propagate up the bus hierarchy until someone handles it. */ 1921 if (dev->parent) 1922 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1923 r)); 1924 return (EINVAL); 1925 } 1926 1927 int 1928 bus_generic_rl_get_resource (device_t dev, device_t child, int type, int rid, 1929 u_long *startp, u_long *countp) 1930 { 1931 struct resource_list * rl = NULL; 1932 struct resource_list_entry * rle = NULL; 1933 1934 rl = BUS_GET_RESOURCE_LIST(dev, child); 1935 if (!rl) 1936 return (EINVAL); 1937 1938 rle = resource_list_find(rl, type, rid); 1939 if (!rle) 1940 return (ENOENT); 1941 1942 if (startp) 1943 *startp = rle->start; 1944 if (countp) 1945 *countp = rle->count; 1946 1947 return (0); 1948 } 1949 1950 int 1951 bus_generic_rl_set_resource (device_t dev, device_t child, int type, int rid, 1952 u_long start, u_long count) 1953 { 1954 struct resource_list * rl = NULL; 1955 1956 rl = BUS_GET_RESOURCE_LIST(dev, child); 1957 if (!rl) 1958 return (EINVAL); 1959 1960 resource_list_add(rl, type, rid, start, (start + count - 1), count); 1961 1962 return (0); 1963 } 1964 1965 void 1966 bus_generic_rl_delete_resource (device_t dev, device_t child, int type, int rid) 1967 { 1968 struct resource_list * rl = NULL; 1969 1970 rl = BUS_GET_RESOURCE_LIST(dev, child); 1971 if (!rl) 1972 return; 1973 1974 resource_list_delete(rl, type, rid); 1975 1976 return; 1977 } 1978 1979 int 1980 bus_generic_rl_release_resource (device_t dev, device_t child, int type, 1981 int rid, struct resource *r) 1982 { 1983 struct resource_list * rl = NULL; 1984 1985 rl = BUS_GET_RESOURCE_LIST(dev, child); 1986 if (!rl) 1987 return (EINVAL); 1988 1989 return (resource_list_release(rl, dev, child, type, rid, r)); 1990 } 1991 1992 struct resource * 1993 bus_generic_rl_alloc_resource (device_t dev, device_t child, int type, 1994 int *rid, u_long start, u_long end, u_long count, u_int flags) 1995 { 1996 struct resource_list * rl = NULL; 1997 1998 rl = BUS_GET_RESOURCE_LIST(dev, child); 1999 if (!rl) 2000 return (NULL); 2001 2002 return (resource_list_alloc(rl, dev, child, type, rid, 2003 start, end, count, flags)); 2004 } 2005 2006 int 2007 bus_generic_child_present(device_t bus, device_t child) 2008 { 2009 return (BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2010 } 2011 2012 /* 2013 * Some convenience functions to make it easier for drivers to use the 2014 * resource-management functions. All these really do is hide the 2015 * indirection through the parent's method table, making for slightly 2016 * less-wordy code. In the future, it might make sense for this code 2017 * to maintain some sort of a list of resources allocated by each device. 2018 */ 2019 struct resource * 2020 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2021 u_long count, u_int flags) 2022 { 2023 if (dev->parent == 0) 2024 return (0); 2025 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2026 count, flags)); 2027 } 2028 2029 int 2030 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2031 { 2032 if (dev->parent == 0) 2033 return (EINVAL); 2034 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2035 } 2036 2037 int 2038 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2039 { 2040 if (dev->parent == 0) 2041 return (EINVAL); 2042 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2043 } 2044 2045 int 2046 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2047 { 2048 if (dev->parent == 0) 2049 return (EINVAL); 2050 return (BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2051 } 2052 2053 int 2054 bus_setup_intr(device_t dev, struct resource *r, int flags, 2055 driver_intr_t handler, void *arg, void **cookiep) 2056 { 2057 if (dev->parent == 0) 2058 return (EINVAL); 2059 return (BUS_SETUP_INTR(dev->parent, dev, r, flags, 2060 handler, arg, cookiep)); 2061 } 2062 2063 int 2064 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2065 { 2066 if (dev->parent == 0) 2067 return (EINVAL); 2068 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2069 } 2070 2071 int 2072 bus_set_resource(device_t dev, int type, int rid, 2073 u_long start, u_long count) 2074 { 2075 return (BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2076 start, count)); 2077 } 2078 2079 int 2080 bus_get_resource(device_t dev, int type, int rid, 2081 u_long *startp, u_long *countp) 2082 { 2083 return (BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2084 startp, countp)); 2085 } 2086 2087 u_long 2088 bus_get_resource_start(device_t dev, int type, int rid) 2089 { 2090 u_long start, count; 2091 int error; 2092 2093 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2094 &start, &count); 2095 if (error) 2096 return (0); 2097 return (start); 2098 } 2099 2100 u_long 2101 bus_get_resource_count(device_t dev, int type, int rid) 2102 { 2103 u_long start, count; 2104 int error; 2105 2106 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2107 &start, &count); 2108 if (error) 2109 return (0); 2110 return (count); 2111 } 2112 2113 void 2114 bus_delete_resource(device_t dev, int type, int rid) 2115 { 2116 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2117 } 2118 2119 int 2120 bus_child_present(device_t child) 2121 { 2122 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2123 } 2124 2125 int 2126 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2127 { 2128 device_t parent; 2129 2130 parent = device_get_parent(child); 2131 if (parent == NULL) { 2132 *buf = '\0'; 2133 return (0); 2134 } 2135 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2136 } 2137 2138 int 2139 bus_child_location_str(device_t child, char *buf, size_t buflen) 2140 { 2141 device_t parent; 2142 2143 parent = device_get_parent(child); 2144 if (parent == NULL) { 2145 *buf = '\0'; 2146 return (0); 2147 } 2148 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2149 } 2150 2151 static int 2152 root_print_child(device_t dev, device_t child) 2153 { 2154 int retval = 0; 2155 2156 retval += bus_print_child_header(dev, child); 2157 retval += printf("\n"); 2158 2159 return (retval); 2160 } 2161 2162 static int 2163 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2164 void **cookiep) 2165 { 2166 /* 2167 * If an interrupt mapping gets to here something bad has happened. 2168 */ 2169 panic("root_setup_intr"); 2170 } 2171 2172 /* 2173 * If we get here, assume that the device is permanant and really is 2174 * present in the system. Removable bus drivers are expected to intercept 2175 * this call long before it gets here. We return -1 so that drivers that 2176 * really care can check vs -1 or some ERRNO returned higher in the food 2177 * chain. 2178 */ 2179 static int 2180 root_child_present(device_t dev, device_t child) 2181 { 2182 return (-1); 2183 } 2184 2185 static kobj_method_t root_methods[] = { 2186 /* Device interface */ 2187 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2188 KOBJMETHOD(device_suspend, bus_generic_suspend), 2189 KOBJMETHOD(device_resume, bus_generic_resume), 2190 2191 /* Bus interface */ 2192 KOBJMETHOD(bus_print_child, root_print_child), 2193 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2194 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2195 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2196 KOBJMETHOD(bus_child_present, root_child_present), 2197 2198 { 0, 0 } 2199 }; 2200 2201 static driver_t root_driver = { 2202 "root", 2203 root_methods, 2204 1, /* no softc */ 2205 }; 2206 2207 device_t root_bus; 2208 devclass_t root_devclass; 2209 2210 static int 2211 root_bus_module_handler(module_t mod, int what, void* arg) 2212 { 2213 switch (what) { 2214 case MOD_LOAD: 2215 TAILQ_INIT(&bus_data_devices); 2216 kobj_class_compile((kobj_class_t) &root_driver); 2217 root_bus = make_device(NULL, "root", 0); 2218 root_bus->desc = "System root bus"; 2219 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2220 root_bus->driver = &root_driver; 2221 root_bus->state = DS_ATTACHED; 2222 root_devclass = devclass_find_internal("root", FALSE); 2223 devinit(); 2224 return (0); 2225 2226 case MOD_SHUTDOWN: 2227 device_shutdown(root_bus); 2228 return (0); 2229 } 2230 2231 return (0); 2232 } 2233 2234 static moduledata_t root_bus_mod = { 2235 "rootbus", 2236 root_bus_module_handler, 2237 0 2238 }; 2239 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2240 2241 void 2242 root_bus_configure(void) 2243 { 2244 device_t dev; 2245 2246 PDEBUG((".")); 2247 2248 TAILQ_FOREACH(dev, &root_bus->children, link) { 2249 device_probe_and_attach(dev); 2250 } 2251 } 2252 2253 int 2254 driver_module_handler(module_t mod, int what, void *arg) 2255 { 2256 int error, i; 2257 struct driver_module_data *dmd; 2258 devclass_t bus_devclass; 2259 2260 dmd = (struct driver_module_data *)arg; 2261 bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE); 2262 error = 0; 2263 2264 switch (what) { 2265 case MOD_LOAD: 2266 if (dmd->dmd_chainevh) 2267 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2268 2269 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2270 PDEBUG(("Loading module: driver %s on bus %s", 2271 DRIVERNAME(dmd->dmd_drivers[i]), dmd->dmd_busname)); 2272 error = devclass_add_driver(bus_devclass, 2273 dmd->dmd_drivers[i]); 2274 } 2275 if (error) 2276 break; 2277 2278 /* 2279 * The drivers loaded in this way are assumed to all 2280 * implement the same devclass. 2281 */ 2282 *dmd->dmd_devclass = 2283 devclass_find_internal(dmd->dmd_drivers[0]->name, TRUE); 2284 break; 2285 2286 case MOD_UNLOAD: 2287 for (i = 0; !error && i < dmd->dmd_ndrivers; i++) { 2288 PDEBUG(("Unloading module: driver %s from bus %s", 2289 DRIVERNAME(dmd->dmd_drivers[i]), 2290 dmd->dmd_busname)); 2291 error = devclass_delete_driver(bus_devclass, 2292 dmd->dmd_drivers[i]); 2293 } 2294 2295 if (!error && dmd->dmd_chainevh) 2296 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2297 break; 2298 } 2299 2300 return (error); 2301 } 2302 2303 #ifdef BUS_DEBUG 2304 2305 /* the _short versions avoid iteration by not calling anything that prints 2306 * more than oneliners. I love oneliners. 2307 */ 2308 2309 static void 2310 print_device_short(device_t dev, int indent) 2311 { 2312 if (!dev) 2313 return; 2314 2315 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2316 dev->unit, dev->desc, 2317 (dev->parent? "":"no "), 2318 (TAILQ_EMPTY(&dev->children)? "no ":""), 2319 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2320 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2321 (dev->flags&DF_WILDCARD? "wildcard,":""), 2322 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2323 (dev->ivars? "":"no "), 2324 (dev->softc? "":"no "), 2325 dev->busy)); 2326 } 2327 2328 static void 2329 print_device(device_t dev, int indent) 2330 { 2331 if (!dev) 2332 return; 2333 2334 print_device_short(dev, indent); 2335 2336 indentprintf(("Parent:\n")); 2337 print_device_short(dev->parent, indent+1); 2338 indentprintf(("Driver:\n")); 2339 print_driver_short(dev->driver, indent+1); 2340 indentprintf(("Devclass:\n")); 2341 print_devclass_short(dev->devclass, indent+1); 2342 } 2343 2344 void 2345 print_device_tree_short(device_t dev, int indent) 2346 /* print the device and all its children (indented) */ 2347 { 2348 device_t child; 2349 2350 if (!dev) 2351 return; 2352 2353 print_device_short(dev, indent); 2354 2355 TAILQ_FOREACH(child, &dev->children, link) { 2356 print_device_tree_short(child, indent+1); 2357 } 2358 } 2359 2360 void 2361 print_device_tree(device_t dev, int indent) 2362 /* print the device and all its children (indented) */ 2363 { 2364 device_t child; 2365 2366 if (!dev) 2367 return; 2368 2369 print_device(dev, indent); 2370 2371 TAILQ_FOREACH(child, &dev->children, link) { 2372 print_device_tree(child, indent+1); 2373 } 2374 } 2375 2376 static void 2377 print_driver_short(driver_t *driver, int indent) 2378 { 2379 if (!driver) 2380 return; 2381 2382 indentprintf(("driver %s: softc size = %zd\n", 2383 driver->name, driver->size)); 2384 } 2385 2386 static void 2387 print_driver(driver_t *driver, int indent) 2388 { 2389 if (!driver) 2390 return; 2391 2392 print_driver_short(driver, indent); 2393 } 2394 2395 2396 static void 2397 print_driver_list(driver_list_t drivers, int indent) 2398 { 2399 driverlink_t driver; 2400 2401 TAILQ_FOREACH(driver, &drivers, link) { 2402 print_driver(driver->driver, indent); 2403 } 2404 } 2405 2406 static void 2407 print_devclass_short(devclass_t dc, int indent) 2408 { 2409 if ( !dc ) 2410 return; 2411 2412 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2413 } 2414 2415 static void 2416 print_devclass(devclass_t dc, int indent) 2417 { 2418 int i; 2419 2420 if ( !dc ) 2421 return; 2422 2423 print_devclass_short(dc, indent); 2424 indentprintf(("Drivers:\n")); 2425 print_driver_list(dc->drivers, indent+1); 2426 2427 indentprintf(("Devices:\n")); 2428 for (i = 0; i < dc->maxunit; i++) 2429 if (dc->devices[i]) 2430 print_device(dc->devices[i], indent+1); 2431 } 2432 2433 void 2434 print_devclass_list_short(void) 2435 { 2436 devclass_t dc; 2437 2438 printf("Short listing of devclasses, drivers & devices:\n"); 2439 TAILQ_FOREACH(dc, &devclasses, link) { 2440 print_devclass_short(dc, 0); 2441 } 2442 } 2443 2444 void 2445 print_devclass_list(void) 2446 { 2447 devclass_t dc; 2448 2449 printf("Full listing of devclasses, drivers & devices:\n"); 2450 TAILQ_FOREACH(dc, &devclasses, link) { 2451 print_devclass(dc, 0); 2452 } 2453 } 2454 2455 #endif 2456 2457 /* 2458 * User-space access to the device tree. 2459 * 2460 * We implement a small set of nodes: 2461 * 2462 * hw.bus Single integer read method to obtain the 2463 * current generation count. 2464 * hw.bus.devices Reads the entire device tree in flat space. 2465 * hw.bus.rman Resource manager interface 2466 * 2467 * We might like to add the ability to scan devclasses and/or drivers to 2468 * determine what else is currently loaded/available. 2469 */ 2470 2471 static int 2472 sysctl_bus(SYSCTL_HANDLER_ARGS) 2473 { 2474 struct u_businfo ubus; 2475 2476 ubus.ub_version = BUS_USER_VERSION; 2477 ubus.ub_generation = bus_data_generation; 2478 2479 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 2480 } 2481 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 2482 "bus-related data"); 2483 2484 static int 2485 sysctl_devices(SYSCTL_HANDLER_ARGS) 2486 { 2487 int *name = (int *)arg1; 2488 u_int namelen = arg2; 2489 int index; 2490 struct device *dev; 2491 struct u_device udev; /* XXX this is a bit big */ 2492 int error; 2493 2494 if (namelen != 2) 2495 return (EINVAL); 2496 2497 if (bus_data_generation_check(name[0])) 2498 return (EINVAL); 2499 2500 index = name[1]; 2501 2502 /* 2503 * Scan the list of devices, looking for the requested index. 2504 */ 2505 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 2506 if (index-- == 0) 2507 break; 2508 } 2509 if (dev == NULL) 2510 return (ENOENT); 2511 2512 /* 2513 * Populate the return array. 2514 */ 2515 udev.dv_handle = (uintptr_t)dev; 2516 udev.dv_parent = (uintptr_t)dev->parent; 2517 if (dev->nameunit == NULL) 2518 udev.dv_name[0] = '\0'; 2519 else 2520 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 2521 2522 if (dev->desc == NULL) 2523 udev.dv_desc[0] = '\0'; 2524 else 2525 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 2526 if (dev->driver == NULL || dev->driver->name == NULL) 2527 udev.dv_drivername[0] = '\0'; 2528 else 2529 strlcpy(udev.dv_drivername, dev->driver->name, 2530 sizeof(udev.dv_drivername)); 2531 udev.dv_pnpinfo[0] = '\0'; 2532 udev.dv_location[0] = '\0'; 2533 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 2534 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 2535 udev.dv_devflags = dev->devflags; 2536 udev.dv_flags = dev->flags; 2537 udev.dv_state = dev->state; 2538 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 2539 return (error); 2540 } 2541 2542 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 2543 "system device tree"); 2544 2545 /* 2546 * Sysctl interface for scanning the resource lists. 2547 * 2548 * We take two input parameters; the index into the list of resource 2549 * managers, and the resource offset into the list. 2550 */ 2551 static int 2552 sysctl_rman(SYSCTL_HANDLER_ARGS) 2553 { 2554 int *name = (int *)arg1; 2555 u_int namelen = arg2; 2556 int rman_idx, res_idx; 2557 struct rman *rm; 2558 struct resource *res; 2559 struct u_rman urm; 2560 struct u_resource ures; 2561 int error; 2562 2563 if (namelen != 3) 2564 return (EINVAL); 2565 2566 if (bus_data_generation_check(name[0])) 2567 return (EINVAL); 2568 rman_idx = name[1]; 2569 res_idx = name[2]; 2570 2571 /* 2572 * Find the indexed resource manager 2573 */ 2574 TAILQ_FOREACH(rm, &rman_head, rm_link) { 2575 if (rman_idx-- == 0) 2576 break; 2577 } 2578 if (rm == NULL) 2579 return (ENOENT); 2580 2581 /* 2582 * If the resource index is -1, we want details on the 2583 * resource manager. 2584 */ 2585 if (res_idx == -1) { 2586 urm.rm_handle = (uintptr_t)rm; 2587 strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN); 2588 urm.rm_start = rm->rm_start; 2589 urm.rm_size = rm->rm_end - rm->rm_start + 1; 2590 urm.rm_type = rm->rm_type; 2591 2592 error = SYSCTL_OUT(req, &urm, sizeof(urm)); 2593 return (error); 2594 } 2595 2596 /* 2597 * Find the indexed resource and return it. 2598 */ 2599 TAILQ_FOREACH(res, &rm->rm_list, r_link) { 2600 if (res_idx-- == 0) { 2601 ures.r_handle = (uintptr_t)res; 2602 ures.r_parent = (uintptr_t)res->r_rm; 2603 ures.r_device = (uintptr_t)res->r_dev; 2604 if (res->r_dev != NULL) { 2605 if (device_get_name(res->r_dev) != NULL) { 2606 snprintf(ures.r_devname, RM_TEXTLEN, 2607 "%s%d", 2608 device_get_name(res->r_dev), 2609 device_get_unit(res->r_dev)); 2610 } else { 2611 strlcpy(ures.r_devname, "nomatch", 2612 RM_TEXTLEN); 2613 } 2614 } else { 2615 ures.r_devname[0] = '\0'; 2616 } 2617 ures.r_start = res->r_start; 2618 ures.r_size = res->r_end - res->r_start + 1; 2619 ures.r_flags = res->r_flags; 2620 2621 error = SYSCTL_OUT(req, &ures, sizeof(ures)); 2622 return (error); 2623 } 2624 } 2625 return (ENOENT); 2626 } 2627 2628 SYSCTL_NODE(_hw_bus, OID_AUTO, rman, CTLFLAG_RD, sysctl_rman, 2629 "kernel resource manager"); 2630 2631 int 2632 bus_data_generation_check(int generation) 2633 { 2634 if (generation != bus_data_generation) 2635 return (1); 2636 2637 /* XXX generate optimised lists here? */ 2638 return (0); 2639 } 2640 2641 void 2642 bus_data_generation_update(void) 2643 { 2644 bus_data_generation++; 2645 }
Cache object: 467a04229d6112ab2d63cb7e1a72934c
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]