1 /*- 2 * Copyright (c) 1997,1998,2003 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_bus.h" 31 32 #include <sys/param.h> 33 #include <sys/conf.h> 34 #include <sys/filio.h> 35 #include <sys/lock.h> 36 #include <sys/kernel.h> 37 #include <sys/kobj.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/poll.h> 42 #include <sys/proc.h> 43 #include <sys/condvar.h> 44 #include <sys/queue.h> 45 #include <machine/bus.h> 46 #include <sys/rman.h> 47 #include <sys/selinfo.h> 48 #include <sys/signalvar.h> 49 #include <sys/sysctl.h> 50 #include <sys/systm.h> 51 #include <sys/uio.h> 52 #include <sys/bus.h> 53 54 #include <machine/stdarg.h> 55 56 #include <vm/uma.h> 57 58 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 59 60 /* 61 * Used to attach drivers to devclasses. 62 */ 63 typedef struct driverlink *driverlink_t; 64 struct driverlink { 65 kobj_class_t driver; 66 TAILQ_ENTRY(driverlink) link; /* list of drivers in devclass */ 67 }; 68 69 /* 70 * Forward declarations 71 */ 72 typedef TAILQ_HEAD(devclass_list, devclass) devclass_list_t; 73 typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t; 74 typedef TAILQ_HEAD(device_list, device) device_list_t; 75 76 struct devclass { 77 TAILQ_ENTRY(devclass) link; 78 devclass_t parent; /* parent in devclass hierarchy */ 79 driver_list_t drivers; /* bus devclasses store drivers for bus */ 80 char *name; 81 device_t *devices; /* array of devices indexed by unit */ 82 int maxunit; /* size of devices array */ 83 }; 84 85 /* 86 * Implementation of device. 87 */ 88 struct device { 89 /* 90 * A device is a kernel object. The first field must be the 91 * current ops table for the object. 92 */ 93 KOBJ_FIELDS; 94 95 /* 96 * Device hierarchy. 97 */ 98 TAILQ_ENTRY(device) link; /* list of devices in parent */ 99 TAILQ_ENTRY(device) devlink; /* global device list membership */ 100 device_t parent; 101 device_list_t children; /* list of subordinate devices */ 102 103 /* 104 * Details of this device. 105 */ 106 driver_t *driver; 107 devclass_t devclass; /* device class which we are in */ 108 int unit; 109 char* nameunit; /* name+unit e.g. foodev0 */ 110 char* desc; /* driver specific description */ 111 int busy; /* count of calls to device_busy() */ 112 device_state_t state; 113 u_int32_t devflags; /* api level flags for device_get_flags() */ 114 u_short flags; 115 #define DF_ENABLED 1 /* device should be probed/attached */ 116 #define DF_FIXEDCLASS 2 /* devclass specified at create time */ 117 #define DF_WILDCARD 4 /* unit was originally wildcard */ 118 #define DF_DESCMALLOCED 8 /* description was malloced */ 119 #define DF_QUIET 16 /* don't print verbose attach message */ 120 #define DF_DONENOMATCH 32 /* don't execute DEVICE_NOMATCH again */ 121 #define DF_EXTERNALSOFTC 64 /* softc not allocated by us */ 122 u_char order; /* order from device_add_child_ordered() */ 123 u_char pad; 124 void *ivars; 125 void *softc; 126 }; 127 128 struct device_op_desc { 129 unsigned int offset; /* offset in driver ops */ 130 struct method* method; /* internal method implementation */ 131 devop_t deflt; /* default implementation */ 132 const char* name; /* unique name (for registration) */ 133 }; 134 135 static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 136 static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc"); 137 138 #ifdef BUS_DEBUG 139 140 static int bus_debug = 1; 141 TUNABLE_INT("bus.debug", &bus_debug); 142 SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0, 143 "Debug bus code"); 144 145 #define PDEBUG(a) if (bus_debug) {printf("%s:%d: ", __func__, __LINE__), printf a; printf("\n");} 146 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 147 #define DRIVERNAME(d) ((d)? d->name : "no driver") 148 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 149 150 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 151 * prevent syslog from deleting initial spaces 152 */ 153 #define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while (0) 154 155 static void print_device_short(device_t dev, int indent); 156 static void print_device(device_t dev, int indent); 157 void print_device_tree_short(device_t dev, int indent); 158 void print_device_tree(device_t dev, int indent); 159 static void print_driver_short(driver_t *driver, int indent); 160 static void print_driver(driver_t *driver, int indent); 161 static void print_driver_list(driver_list_t drivers, int indent); 162 static void print_devclass_short(devclass_t dc, int indent); 163 static void print_devclass(devclass_t dc, int indent); 164 void print_devclass_list_short(void); 165 void print_devclass_list(void); 166 167 #else 168 /* Make the compiler ignore the function calls */ 169 #define PDEBUG(a) /* nop */ 170 #define DEVICENAME(d) /* nop */ 171 #define DRIVERNAME(d) /* nop */ 172 #define DEVCLANAME(d) /* nop */ 173 174 #define print_device_short(d,i) /* nop */ 175 #define print_device(d,i) /* nop */ 176 #define print_device_tree_short(d,i) /* nop */ 177 #define print_device_tree(d,i) /* nop */ 178 #define print_driver_short(d,i) /* nop */ 179 #define print_driver(d,i) /* nop */ 180 #define print_driver_list(d,i) /* nop */ 181 #define print_devclass_short(d,i) /* nop */ 182 #define print_devclass(d,i) /* nop */ 183 #define print_devclass_list_short() /* nop */ 184 #define print_devclass_list() /* nop */ 185 #endif 186 187 /* 188 * /dev/devctl implementation 189 */ 190 191 /* 192 * This design allows only one reader for /dev/devctl. This is not desirable 193 * in the long run, but will get a lot of hair out of this implementation. 194 * Maybe we should make this device a clonable device. 195 * 196 * Also note: we specifically do not attach a device to the device_t tree 197 * to avoid potential chicken and egg problems. One could argue that all 198 * of this belongs to the root node. One could also further argue that the 199 * sysctl interface that we have not might more properly be an ioctl 200 * interface, but at this stage of the game, I'm not inclined to rock that 201 * boat. 202 * 203 * I'm also not sure that the SIGIO support is done correctly or not, as 204 * I copied it from a driver that had SIGIO support that likely hasn't been 205 * tested since 3.4 or 2.2.8! 206 */ 207 208 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 209 static int devctl_disable = 0; 210 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 211 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, 212 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_devctl_disable, 213 "I", "devctl disable"); 214 215 static d_open_t devopen; 216 static d_close_t devclose; 217 static d_read_t devread; 218 static d_ioctl_t devioctl; 219 static d_poll_t devpoll; 220 221 #define CDEV_MAJOR 173 222 static struct cdevsw dev_cdevsw = { 223 .d_version = D_VERSION, 224 .d_flags = D_NEEDGIANT, 225 .d_open = devopen, 226 .d_close = devclose, 227 .d_read = devread, 228 .d_ioctl = devioctl, 229 .d_poll = devpoll, 230 .d_name = "devctl", 231 .d_maj = CDEV_MAJOR, 232 }; 233 234 struct dev_event_info 235 { 236 char *dei_data; 237 TAILQ_ENTRY(dev_event_info) dei_link; 238 }; 239 240 TAILQ_HEAD(devq, dev_event_info); 241 242 static struct dev_softc 243 { 244 int inuse; 245 int nonblock; 246 struct mtx mtx; 247 struct cv cv; 248 struct selinfo sel; 249 struct devq devq; 250 struct proc *async_proc; 251 } devsoftc; 252 253 static dev_t devctl_dev; 254 255 static void 256 devinit(void) 257 { 258 devctl_dev = make_dev(&dev_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, 259 "devctl"); 260 mtx_init(&devsoftc.mtx, "dev mtx", "devd", MTX_DEF); 261 cv_init(&devsoftc.cv, "dev cv"); 262 TAILQ_INIT(&devsoftc.devq); 263 } 264 265 static int 266 devopen(dev_t dev, int oflags, int devtype, d_thread_t *td) 267 { 268 if (devsoftc.inuse) 269 return (EBUSY); 270 /* move to init */ 271 devsoftc.inuse = 1; 272 devsoftc.nonblock = 0; 273 devsoftc.async_proc = NULL; 274 return (0); 275 } 276 277 static int 278 devclose(dev_t dev, int fflag, int devtype, d_thread_t *td) 279 { 280 devsoftc.inuse = 0; 281 mtx_lock(&devsoftc.mtx); 282 cv_broadcast(&devsoftc.cv); 283 mtx_unlock(&devsoftc.mtx); 284 285 return (0); 286 } 287 288 /* 289 * The read channel for this device is used to report changes to 290 * userland in realtime. We are required to free the data as well as 291 * the n1 object because we allocate them separately. Also note that 292 * we return one record at a time. If you try to read this device a 293 * character at a time, you will loose the rest of the data. Listening 294 * programs are expected to cope. 295 */ 296 static int 297 devread(dev_t dev, struct uio *uio, int ioflag) 298 { 299 struct dev_event_info *n1; 300 int rv; 301 302 mtx_lock(&devsoftc.mtx); 303 while (TAILQ_EMPTY(&devsoftc.devq)) { 304 if (devsoftc.nonblock) { 305 mtx_unlock(&devsoftc.mtx); 306 return (EAGAIN); 307 } 308 rv = cv_wait_sig(&devsoftc.cv, &devsoftc.mtx); 309 if (rv) { 310 /* 311 * Need to translate ERESTART to EINTR here? -- jake 312 */ 313 mtx_unlock(&devsoftc.mtx); 314 return (rv); 315 } 316 } 317 n1 = TAILQ_FIRST(&devsoftc.devq); 318 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 319 mtx_unlock(&devsoftc.mtx); 320 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 321 free(n1->dei_data, M_BUS); 322 free(n1, M_BUS); 323 return (rv); 324 } 325 326 static int 327 devioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, d_thread_t *td) 328 { 329 switch (cmd) { 330 331 case FIONBIO: 332 if (*(int*)data) 333 devsoftc.nonblock = 1; 334 else 335 devsoftc.nonblock = 0; 336 return (0); 337 case FIOASYNC: 338 if (*(int*)data) 339 devsoftc.async_proc = td->td_proc; 340 else 341 devsoftc.async_proc = NULL; 342 return (0); 343 344 /* (un)Support for other fcntl() calls. */ 345 case FIOCLEX: 346 case FIONCLEX: 347 case FIONREAD: 348 case FIOSETOWN: 349 case FIOGETOWN: 350 default: 351 break; 352 } 353 return (ENOTTY); 354 } 355 356 static int 357 devpoll(dev_t dev, int events, d_thread_t *td) 358 { 359 int revents = 0; 360 361 mtx_lock(&devsoftc.mtx); 362 if (events & (POLLIN | POLLRDNORM)) { 363 if (!TAILQ_EMPTY(&devsoftc.devq)) 364 revents = events & (POLLIN | POLLRDNORM); 365 else 366 selrecord(td, &devsoftc.sel); 367 } 368 mtx_unlock(&devsoftc.mtx); 369 370 return (revents); 371 } 372 373 /* 374 * Generic interface to queue data to the devctl device. It is 375 * assumed that data is properly formatted. It is further assumed 376 * that data is allocated. 377 */ 378 void 379 devctl_queue_data(char *data) 380 { 381 struct dev_event_info *n1 = NULL; 382 struct proc *p; 383 384 n1 = malloc(sizeof(*n1), M_BUS, M_NOWAIT); 385 if (n1 == NULL) 386 return; 387 n1->dei_data = data; 388 mtx_lock(&devsoftc.mtx); 389 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 390 cv_broadcast(&devsoftc.cv); 391 mtx_unlock(&devsoftc.mtx); 392 selwakeup(&devsoftc.sel); 393 p = devsoftc.async_proc; 394 if (p != NULL) { 395 PROC_LOCK(p); 396 psignal(p, SIGIO); 397 PROC_UNLOCK(p); 398 } 399 } 400 401 /* 402 * Send a 'notification' to userland, using standard ways 403 */ 404 void 405 devctl_notify(const char *system, const char *subsystem, const char *type, 406 const char *data) 407 { 408 int len = 0; 409 char *msg; 410 411 if (system == NULL) 412 return; /* BOGUS! Must specify system. */ 413 if (subsystem == NULL) 414 return; /* BOGUS! Must specify subsystem. */ 415 if (type == NULL) 416 return; /* BOGUS! Must specify type. */ 417 len += strlen(" system=") + strlen(system); 418 len += strlen(" subsystem=") + strlen(subsystem); 419 len += strlen(" type=") + strlen(type); 420 /* add in the data message plus newline. */ 421 if (data != NULL) 422 len += strlen(data); 423 len += 3; /* '!', '\n', and NUL */ 424 msg = malloc(len, M_BUS, M_NOWAIT); 425 if (msg == NULL) 426 return; /* Drop it on the floor */ 427 snprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n", system, 428 subsystem, type, data); 429 devctl_queue_data(msg); 430 } 431 432 /* 433 * Common routine that tries to make sending messages as easy as possible. 434 * We allocate memory for the data, copy strings into that, but do not 435 * free it unless there's an error. The dequeue part of the driver should 436 * free the data. We don't send data when the device is disabled. We do 437 * send data, even when we have no listeners, because we wish to avoid 438 * races relating to startup and restart of listening applications. 439 */ 440 static void 441 devaddq(const char *type, const char *what, device_t dev) 442 { 443 char *data = NULL; 444 char *loc; 445 const char *parstr; 446 447 if (devctl_disable) 448 return; 449 data = malloc(1024, M_BUS, M_NOWAIT); 450 if (data == NULL) 451 goto bad; 452 loc = malloc(1024, M_BUS, M_NOWAIT); 453 if (loc == NULL) 454 goto bad; 455 *loc = '\0'; 456 bus_child_location_str(dev, loc, 1024); 457 if (device_get_parent(dev) == NULL) 458 parstr = "."; /* Or '/' ? */ 459 else 460 parstr = device_get_nameunit(device_get_parent(dev)); 461 snprintf(data, 1024, "%s%s at %s on %s\n", type, what, loc, parstr); 462 free(loc, M_BUS); 463 devctl_queue_data(data); 464 return; 465 bad: 466 free(data, M_BUS); 467 return; 468 } 469 470 /* 471 * A device was added to the tree. We are called just after it successfully 472 * attaches (that is, probe and attach success for this device). No call 473 * is made if a device is merely parented into the tree. See devnomatch 474 * if probe fails. If attach fails, no notification is sent (but maybe 475 * we should have a different message for this). 476 */ 477 static void 478 devadded(device_t dev) 479 { 480 devaddq("+", device_get_nameunit(dev), dev); 481 } 482 483 /* 484 * A device was removed from the tree. We are called just before this 485 * happens. 486 */ 487 static void 488 devremoved(device_t dev) 489 { 490 devaddq("-", device_get_nameunit(dev), dev); 491 } 492 493 /* 494 * Called when there's no match for this device. This is only called 495 * the first time that no match happens, so we don't keep getitng this 496 * message. Should that prove to be undesirable, we can change it. 497 * This is called when all drivers that can attach to a given bus 498 * decline to accept this device. Other errrors may not be detected. 499 */ 500 static void 501 devnomatch(device_t dev) 502 { 503 char *pnp = NULL; 504 505 pnp = malloc(1024, M_BUS, M_NOWAIT); 506 if (pnp == NULL) 507 return; 508 *pnp = '\0'; 509 bus_child_pnpinfo_str(dev, pnp, 1024); 510 devaddq("?", pnp, dev); 511 free(pnp, M_BUS); 512 return; 513 } 514 515 static int 516 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 517 { 518 struct dev_event_info *n1; 519 int dis, error; 520 521 dis = devctl_disable; 522 error = sysctl_handle_int(oidp, &dis, 0, req); 523 if (error || !req->newptr) 524 return (error); 525 mtx_lock(&devsoftc.mtx); 526 devctl_disable = dis; 527 if (dis) { 528 while (!TAILQ_EMPTY(&devsoftc.devq)) { 529 n1 = TAILQ_FIRST(&devsoftc.devq); 530 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 531 free(n1->dei_data, M_BUS); 532 free(n1, M_BUS); 533 } 534 } 535 mtx_unlock(&devsoftc.mtx); 536 return (0); 537 } 538 539 /* End of /dev/devctl code */ 540 541 TAILQ_HEAD(,device) bus_data_devices; 542 static int bus_data_generation = 1; 543 544 kobj_method_t null_methods[] = { 545 { 0, 0 } 546 }; 547 548 DEFINE_CLASS(null, null_methods, 0); 549 550 /* 551 * Devclass implementation 552 */ 553 554 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 555 556 static devclass_t 557 devclass_find_internal(const char *classname, const char *parentname, 558 int create) 559 { 560 devclass_t dc; 561 562 PDEBUG(("looking for %s", classname)); 563 if (!classname) 564 return (NULL); 565 566 TAILQ_FOREACH(dc, &devclasses, link) { 567 if (!strcmp(dc->name, classname)) 568 break; 569 } 570 571 if (create && !dc) { 572 PDEBUG(("creating %s", classname)); 573 dc = malloc(sizeof(struct devclass) + strlen(classname) + 1, 574 M_BUS, M_NOWAIT|M_ZERO); 575 if (!dc) 576 return (NULL); 577 dc->parent = NULL; 578 dc->name = (char*) (dc + 1); 579 strcpy(dc->name, classname); 580 TAILQ_INIT(&dc->drivers); 581 TAILQ_INSERT_TAIL(&devclasses, dc, link); 582 583 bus_data_generation_update(); 584 } 585 if (parentname && dc && !dc->parent) { 586 dc->parent = devclass_find_internal(parentname, 0, FALSE); 587 } 588 589 return (dc); 590 } 591 592 devclass_t 593 devclass_create(const char *classname) 594 { 595 return (devclass_find_internal(classname, 0, TRUE)); 596 } 597 598 devclass_t 599 devclass_find(const char *classname) 600 { 601 return (devclass_find_internal(classname, 0, FALSE)); 602 } 603 604 int 605 devclass_add_driver(devclass_t dc, driver_t *driver) 606 { 607 driverlink_t dl; 608 int i; 609 610 PDEBUG(("%s", DRIVERNAME(driver))); 611 612 dl = malloc(sizeof *dl, M_BUS, M_NOWAIT|M_ZERO); 613 if (!dl) 614 return (ENOMEM); 615 616 /* 617 * Compile the driver's methods. Also increase the reference count 618 * so that the class doesn't get freed when the last instance 619 * goes. This means we can safely use static methods and avoids a 620 * double-free in devclass_delete_driver. 621 */ 622 kobj_class_compile((kobj_class_t) driver); 623 624 /* 625 * Make sure the devclass which the driver is implementing exists. 626 */ 627 devclass_find_internal(driver->name, 0, TRUE); 628 629 dl->driver = driver; 630 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 631 driver->refs++; 632 633 /* 634 * Call BUS_DRIVER_ADDED for any existing busses in this class. 635 */ 636 for (i = 0; i < dc->maxunit; i++) 637 if (dc->devices[i]) 638 BUS_DRIVER_ADDED(dc->devices[i], driver); 639 640 bus_data_generation_update(); 641 return (0); 642 } 643 644 int 645 devclass_delete_driver(devclass_t busclass, driver_t *driver) 646 { 647 devclass_t dc = devclass_find(driver->name); 648 driverlink_t dl; 649 device_t dev; 650 int i; 651 int error; 652 653 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 654 655 if (!dc) 656 return (0); 657 658 /* 659 * Find the link structure in the bus' list of drivers. 660 */ 661 TAILQ_FOREACH(dl, &busclass->drivers, link) { 662 if (dl->driver == driver) 663 break; 664 } 665 666 if (!dl) { 667 PDEBUG(("%s not found in %s list", driver->name, 668 busclass->name)); 669 return (ENOENT); 670 } 671 672 /* 673 * Disassociate from any devices. We iterate through all the 674 * devices in the devclass of the driver and detach any which are 675 * using the driver and which have a parent in the devclass which 676 * we are deleting from. 677 * 678 * Note that since a driver can be in multiple devclasses, we 679 * should not detach devices which are not children of devices in 680 * the affected devclass. 681 */ 682 for (i = 0; i < dc->maxunit; i++) { 683 if (dc->devices[i]) { 684 dev = dc->devices[i]; 685 if (dev->driver == driver && dev->parent && 686 dev->parent->devclass == busclass) { 687 if ((error = device_detach(dev)) != 0) 688 return (error); 689 device_set_driver(dev, NULL); 690 } 691 } 692 } 693 694 TAILQ_REMOVE(&busclass->drivers, dl, link); 695 free(dl, M_BUS); 696 697 driver->refs--; 698 if (driver->refs == 0) 699 kobj_class_free((kobj_class_t) driver); 700 701 bus_data_generation_update(); 702 return (0); 703 } 704 705 static driverlink_t 706 devclass_find_driver_internal(devclass_t dc, const char *classname) 707 { 708 driverlink_t dl; 709 710 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 711 712 TAILQ_FOREACH(dl, &dc->drivers, link) { 713 if (!strcmp(dl->driver->name, classname)) 714 return (dl); 715 } 716 717 PDEBUG(("not found")); 718 return (NULL); 719 } 720 721 kobj_class_t 722 devclass_find_driver(devclass_t dc, const char *classname) 723 { 724 driverlink_t dl; 725 726 dl = devclass_find_driver_internal(dc, classname); 727 if (dl) 728 return (dl->driver); 729 return (NULL); 730 } 731 732 const char * 733 devclass_get_name(devclass_t dc) 734 { 735 return (dc->name); 736 } 737 738 device_t 739 devclass_get_device(devclass_t dc, int unit) 740 { 741 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 742 return (NULL); 743 return (dc->devices[unit]); 744 } 745 746 void * 747 devclass_get_softc(devclass_t dc, int unit) 748 { 749 device_t dev; 750 751 dev = devclass_get_device(dc, unit); 752 if (!dev) 753 return (NULL); 754 755 return (device_get_softc(dev)); 756 } 757 758 int 759 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 760 { 761 int i; 762 int count; 763 device_t *list; 764 765 count = 0; 766 for (i = 0; i < dc->maxunit; i++) 767 if (dc->devices[i]) 768 count++; 769 770 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO); 771 if (!list) 772 return (ENOMEM); 773 774 count = 0; 775 for (i = 0; i < dc->maxunit; i++) { 776 if (dc->devices[i]) { 777 list[count] = dc->devices[i]; 778 count++; 779 } 780 } 781 782 *devlistp = list; 783 *devcountp = count; 784 785 return (0); 786 } 787 788 int 789 devclass_get_maxunit(devclass_t dc) 790 { 791 return (dc->maxunit); 792 } 793 794 int 795 devclass_find_free_unit(devclass_t dc, int unit) 796 { 797 if (dc == NULL) 798 return (unit); 799 while (unit < dc->maxunit && dc->devices[unit] != NULL) 800 unit++; 801 return (unit); 802 } 803 804 void 805 devclass_set_parent(devclass_t dc, devclass_t pdc) 806 { 807 dc->parent = pdc; 808 } 809 810 devclass_t 811 devclass_get_parent(devclass_t dc) 812 { 813 return (dc->parent); 814 } 815 816 static int 817 devclass_alloc_unit(devclass_t dc, int *unitp) 818 { 819 int unit = *unitp; 820 821 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 822 823 /* If we were given a wired unit number, check for existing device */ 824 /* XXX imp XXX */ 825 if (unit != -1) { 826 if (unit >= 0 && unit < dc->maxunit && 827 dc->devices[unit] != NULL) { 828 if (bootverbose) 829 printf("%s: %s%d already exists; skipping it\n", 830 dc->name, dc->name, *unitp); 831 return (EEXIST); 832 } 833 } else { 834 /* Unwired device, find the next available slot for it */ 835 unit = 0; 836 while (unit < dc->maxunit && dc->devices[unit] != NULL) 837 unit++; 838 } 839 840 /* 841 * We've selected a unit beyond the length of the table, so let's 842 * extend the table to make room for all units up to and including 843 * this one. 844 */ 845 if (unit >= dc->maxunit) { 846 device_t *newlist; 847 int newsize; 848 849 newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); 850 newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT); 851 if (!newlist) 852 return (ENOMEM); 853 bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); 854 bzero(newlist + dc->maxunit, 855 sizeof(device_t) * (newsize - dc->maxunit)); 856 if (dc->devices) 857 free(dc->devices, M_BUS); 858 dc->devices = newlist; 859 dc->maxunit = newsize; 860 } 861 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 862 863 *unitp = unit; 864 return (0); 865 } 866 867 static int 868 devclass_add_device(devclass_t dc, device_t dev) 869 { 870 int buflen, error; 871 872 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 873 874 buflen = snprintf(NULL, 0, "%s%d$", dc->name, dev->unit); 875 if (buflen < 0) 876 return (ENOMEM); 877 dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT|M_ZERO); 878 if (!dev->nameunit) 879 return (ENOMEM); 880 881 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 882 free(dev->nameunit, M_BUS); 883 dev->nameunit = NULL; 884 return (error); 885 } 886 dc->devices[dev->unit] = dev; 887 dev->devclass = dc; 888 snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 889 890 return (0); 891 } 892 893 static int 894 devclass_delete_device(devclass_t dc, device_t dev) 895 { 896 if (!dc || !dev) 897 return (0); 898 899 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 900 901 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 902 panic("devclass_delete_device: inconsistent device class"); 903 dc->devices[dev->unit] = NULL; 904 if (dev->flags & DF_WILDCARD) 905 dev->unit = -1; 906 dev->devclass = NULL; 907 free(dev->nameunit, M_BUS); 908 dev->nameunit = NULL; 909 910 return (0); 911 } 912 913 static device_t 914 make_device(device_t parent, const char *name, int unit) 915 { 916 device_t dev; 917 devclass_t dc; 918 919 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 920 921 if (name) { 922 dc = devclass_find_internal(name, 0, TRUE); 923 if (!dc) { 924 printf("make_device: can't find device class %s\n", 925 name); 926 return (NULL); 927 } 928 } else { 929 dc = NULL; 930 } 931 932 dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT|M_ZERO); 933 if (!dev) 934 return (NULL); 935 936 dev->parent = parent; 937 TAILQ_INIT(&dev->children); 938 kobj_init((kobj_t) dev, &null_class); 939 dev->driver = NULL; 940 dev->devclass = NULL; 941 dev->unit = unit; 942 dev->nameunit = NULL; 943 dev->desc = NULL; 944 dev->busy = 0; 945 dev->devflags = 0; 946 dev->flags = DF_ENABLED; 947 dev->order = 0; 948 if (unit == -1) 949 dev->flags |= DF_WILDCARD; 950 if (name) { 951 dev->flags |= DF_FIXEDCLASS; 952 if (devclass_add_device(dc, dev)) { 953 kobj_delete((kobj_t) dev, M_BUS); 954 return (NULL); 955 } 956 } 957 dev->ivars = NULL; 958 dev->softc = NULL; 959 960 dev->state = DS_NOTPRESENT; 961 962 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 963 bus_data_generation_update(); 964 965 return (dev); 966 } 967 968 static int 969 device_print_child(device_t dev, device_t child) 970 { 971 int retval = 0; 972 973 if (device_is_alive(child)) 974 retval += BUS_PRINT_CHILD(dev, child); 975 else 976 retval += device_printf(child, " not found\n"); 977 978 return (retval); 979 } 980 981 device_t 982 device_add_child(device_t dev, const char *name, int unit) 983 { 984 return (device_add_child_ordered(dev, 0, name, unit)); 985 } 986 987 device_t 988 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 989 { 990 device_t child; 991 device_t place; 992 993 PDEBUG(("%s at %s with order %d as unit %d", 994 name, DEVICENAME(dev), order, unit)); 995 996 child = make_device(dev, name, unit); 997 if (child == NULL) 998 return (child); 999 child->order = order; 1000 1001 TAILQ_FOREACH(place, &dev->children, link) { 1002 if (place->order > order) 1003 break; 1004 } 1005 1006 if (place) { 1007 /* 1008 * The device 'place' is the first device whose order is 1009 * greater than the new child. 1010 */ 1011 TAILQ_INSERT_BEFORE(place, child, link); 1012 } else { 1013 /* 1014 * The new child's order is greater or equal to the order of 1015 * any existing device. Add the child to the tail of the list. 1016 */ 1017 TAILQ_INSERT_TAIL(&dev->children, child, link); 1018 } 1019 1020 bus_data_generation_update(); 1021 return (child); 1022 } 1023 1024 int 1025 device_delete_child(device_t dev, device_t child) 1026 { 1027 int error; 1028 device_t grandchild; 1029 1030 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 1031 1032 /* remove children first */ 1033 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 1034 error = device_delete_child(child, grandchild); 1035 if (error) 1036 return (error); 1037 } 1038 1039 if ((error = device_detach(child)) != 0) 1040 return (error); 1041 if (child->devclass) 1042 devclass_delete_device(child->devclass, child); 1043 TAILQ_REMOVE(&dev->children, child, link); 1044 TAILQ_REMOVE(&bus_data_devices, child, devlink); 1045 device_set_desc(child, NULL); 1046 kobj_delete((kobj_t) child, M_BUS); 1047 1048 bus_data_generation_update(); 1049 return (0); 1050 } 1051 1052 /* 1053 * Find only devices attached to this bus. 1054 */ 1055 device_t 1056 device_find_child(device_t dev, const char *classname, int unit) 1057 { 1058 devclass_t dc; 1059 device_t child; 1060 1061 dc = devclass_find(classname); 1062 if (!dc) 1063 return (NULL); 1064 1065 child = devclass_get_device(dc, unit); 1066 if (child && child->parent == dev) 1067 return (child); 1068 return (NULL); 1069 } 1070 1071 static driverlink_t 1072 first_matching_driver(devclass_t dc, device_t dev) 1073 { 1074 if (dev->devclass) 1075 return (devclass_find_driver_internal(dc, dev->devclass->name)); 1076 return (TAILQ_FIRST(&dc->drivers)); 1077 } 1078 1079 static driverlink_t 1080 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1081 { 1082 if (dev->devclass) { 1083 driverlink_t dl; 1084 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1085 if (!strcmp(dev->devclass->name, dl->driver->name)) 1086 return (dl); 1087 return (NULL); 1088 } 1089 return (TAILQ_NEXT(last, link)); 1090 } 1091 1092 static int 1093 device_probe_child(device_t dev, device_t child) 1094 { 1095 devclass_t dc; 1096 driverlink_t best = 0; 1097 driverlink_t dl; 1098 int result, pri = 0; 1099 int hasclass = (child->devclass != 0); 1100 1101 dc = dev->devclass; 1102 if (!dc) 1103 panic("device_probe_child: parent device has no devclass"); 1104 1105 if (child->state == DS_ALIVE) 1106 return (0); 1107 1108 for (; dc; dc = dc->parent) { 1109 for (dl = first_matching_driver(dc, child); 1110 dl; 1111 dl = next_matching_driver(dc, child, dl)) { 1112 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1113 device_set_driver(child, dl->driver); 1114 if (!hasclass) 1115 device_set_devclass(child, dl->driver->name); 1116 result = DEVICE_PROBE(child); 1117 if (!hasclass) 1118 device_set_devclass(child, 0); 1119 1120 /* 1121 * If the driver returns SUCCESS, there can be 1122 * no higher match for this device. 1123 */ 1124 if (result == 0) { 1125 best = dl; 1126 pri = 0; 1127 break; 1128 } 1129 1130 /* 1131 * The driver returned an error so it 1132 * certainly doesn't match. 1133 */ 1134 if (result > 0) { 1135 device_set_driver(child, 0); 1136 continue; 1137 } 1138 1139 /* 1140 * A priority lower than SUCCESS, remember the 1141 * best matching driver. Initialise the value 1142 * of pri for the first match. 1143 */ 1144 if (best == 0 || result > pri) { 1145 best = dl; 1146 pri = result; 1147 continue; 1148 } 1149 } 1150 /* 1151 * If we have an unambiguous match in this devclass, 1152 * don't look in the parent. 1153 */ 1154 if (best && pri == 0) 1155 break; 1156 } 1157 1158 /* 1159 * If we found a driver, change state and initialise the devclass. 1160 */ 1161 if (best) { 1162 if (!child->devclass) 1163 device_set_devclass(child, best->driver->name); 1164 device_set_driver(child, best->driver); 1165 if (pri < 0) { 1166 /* 1167 * A bit bogus. Call the probe method again to make 1168 * sure that we have the right description. 1169 */ 1170 DEVICE_PROBE(child); 1171 } 1172 child->state = DS_ALIVE; 1173 1174 bus_data_generation_update(); 1175 return (0); 1176 } 1177 1178 return (ENXIO); 1179 } 1180 1181 device_t 1182 device_get_parent(device_t dev) 1183 { 1184 return (dev->parent); 1185 } 1186 1187 int 1188 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1189 { 1190 int count; 1191 device_t child; 1192 device_t *list; 1193 1194 count = 0; 1195 TAILQ_FOREACH(child, &dev->children, link) { 1196 count++; 1197 } 1198 1199 list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO); 1200 if (!list) 1201 return (ENOMEM); 1202 1203 count = 0; 1204 TAILQ_FOREACH(child, &dev->children, link) { 1205 list[count] = child; 1206 count++; 1207 } 1208 1209 *devlistp = list; 1210 *devcountp = count; 1211 1212 return (0); 1213 } 1214 1215 driver_t * 1216 device_get_driver(device_t dev) 1217 { 1218 return (dev->driver); 1219 } 1220 1221 devclass_t 1222 device_get_devclass(device_t dev) 1223 { 1224 return (dev->devclass); 1225 } 1226 1227 const char * 1228 device_get_name(device_t dev) 1229 { 1230 if (dev != NULL && dev->devclass) 1231 return (devclass_get_name(dev->devclass)); 1232 return (NULL); 1233 } 1234 1235 const char * 1236 device_get_nameunit(device_t dev) 1237 { 1238 return (dev->nameunit); 1239 } 1240 1241 int 1242 device_get_unit(device_t dev) 1243 { 1244 return (dev->unit); 1245 } 1246 1247 const char * 1248 device_get_desc(device_t dev) 1249 { 1250 return (dev->desc); 1251 } 1252 1253 u_int32_t 1254 device_get_flags(device_t dev) 1255 { 1256 return (dev->devflags); 1257 } 1258 1259 int 1260 device_print_prettyname(device_t dev) 1261 { 1262 const char *name = device_get_name(dev); 1263 1264 if (name == 0) 1265 return (printf("unknown: ")); 1266 return (printf("%s%d: ", name, device_get_unit(dev))); 1267 } 1268 1269 int 1270 device_printf(device_t dev, const char * fmt, ...) 1271 { 1272 va_list ap; 1273 int retval; 1274 1275 retval = device_print_prettyname(dev); 1276 va_start(ap, fmt); 1277 retval += vprintf(fmt, ap); 1278 va_end(ap); 1279 return (retval); 1280 } 1281 1282 static void 1283 device_set_desc_internal(device_t dev, const char* desc, int copy) 1284 { 1285 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1286 free(dev->desc, M_BUS); 1287 dev->flags &= ~DF_DESCMALLOCED; 1288 dev->desc = NULL; 1289 } 1290 1291 if (copy && desc) { 1292 dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT); 1293 if (dev->desc) { 1294 strcpy(dev->desc, desc); 1295 dev->flags |= DF_DESCMALLOCED; 1296 } 1297 } else { 1298 /* Avoid a -Wcast-qual warning */ 1299 dev->desc = (char *)(uintptr_t) desc; 1300 } 1301 1302 bus_data_generation_update(); 1303 } 1304 1305 void 1306 device_set_desc(device_t dev, const char* desc) 1307 { 1308 device_set_desc_internal(dev, desc, FALSE); 1309 } 1310 1311 void 1312 device_set_desc_copy(device_t dev, const char* desc) 1313 { 1314 device_set_desc_internal(dev, desc, TRUE); 1315 } 1316 1317 void 1318 device_set_flags(device_t dev, u_int32_t flags) 1319 { 1320 dev->devflags = flags; 1321 } 1322 1323 void * 1324 device_get_softc(device_t dev) 1325 { 1326 return (dev->softc); 1327 } 1328 1329 void 1330 device_set_softc(device_t dev, void *softc) 1331 { 1332 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1333 free(dev->softc, M_BUS_SC); 1334 dev->softc = softc; 1335 if (dev->softc) 1336 dev->flags |= DF_EXTERNALSOFTC; 1337 else 1338 dev->flags &= ~DF_EXTERNALSOFTC; 1339 } 1340 1341 void * 1342 device_get_ivars(device_t dev) 1343 { 1344 1345 KASSERT(dev != NULL, ("device_get_ivars(NULL, ...)")); 1346 return (dev->ivars); 1347 } 1348 1349 void 1350 device_set_ivars(device_t dev, void * ivars) 1351 { 1352 1353 KASSERT(dev != NULL, ("device_set_ivars(NULL, ...)")); 1354 dev->ivars = ivars; 1355 } 1356 1357 device_state_t 1358 device_get_state(device_t dev) 1359 { 1360 return (dev->state); 1361 } 1362 1363 void 1364 device_enable(device_t dev) 1365 { 1366 dev->flags |= DF_ENABLED; 1367 } 1368 1369 void 1370 device_disable(device_t dev) 1371 { 1372 dev->flags &= ~DF_ENABLED; 1373 } 1374 1375 void 1376 device_busy(device_t dev) 1377 { 1378 if (dev->state < DS_ATTACHED) 1379 panic("device_busy: called for unattached device"); 1380 if (dev->busy == 0 && dev->parent) 1381 device_busy(dev->parent); 1382 dev->busy++; 1383 dev->state = DS_BUSY; 1384 } 1385 1386 void 1387 device_unbusy(device_t dev) 1388 { 1389 if (dev->state != DS_BUSY) 1390 panic("device_unbusy: called for non-busy device"); 1391 dev->busy--; 1392 if (dev->busy == 0) { 1393 if (dev->parent) 1394 device_unbusy(dev->parent); 1395 dev->state = DS_ATTACHED; 1396 } 1397 } 1398 1399 void 1400 device_quiet(device_t dev) 1401 { 1402 dev->flags |= DF_QUIET; 1403 } 1404 1405 void 1406 device_verbose(device_t dev) 1407 { 1408 dev->flags &= ~DF_QUIET; 1409 } 1410 1411 int 1412 device_is_quiet(device_t dev) 1413 { 1414 return ((dev->flags & DF_QUIET) != 0); 1415 } 1416 1417 int 1418 device_is_enabled(device_t dev) 1419 { 1420 return ((dev->flags & DF_ENABLED) != 0); 1421 } 1422 1423 int 1424 device_is_alive(device_t dev) 1425 { 1426 return (dev->state >= DS_ALIVE); 1427 } 1428 1429 int 1430 device_is_attached(device_t dev) 1431 { 1432 return (dev->state >= DS_ATTACHED); 1433 } 1434 1435 int 1436 device_set_devclass(device_t dev, const char *classname) 1437 { 1438 devclass_t dc; 1439 int error; 1440 1441 if (!classname) { 1442 if (dev->devclass) 1443 devclass_delete_device(dev->devclass, dev); 1444 return (0); 1445 } 1446 1447 if (dev->devclass) { 1448 printf("device_set_devclass: device class already set\n"); 1449 return (EINVAL); 1450 } 1451 1452 dc = devclass_find_internal(classname, 0, TRUE); 1453 if (!dc) 1454 return (ENOMEM); 1455 1456 error = devclass_add_device(dc, dev); 1457 1458 bus_data_generation_update(); 1459 return (error); 1460 } 1461 1462 int 1463 device_set_driver(device_t dev, driver_t *driver) 1464 { 1465 if (dev->state >= DS_ATTACHED) 1466 return (EBUSY); 1467 1468 if (dev->driver == driver) 1469 return (0); 1470 1471 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1472 free(dev->softc, M_BUS_SC); 1473 dev->softc = NULL; 1474 } 1475 kobj_delete((kobj_t) dev, 0); 1476 dev->driver = driver; 1477 if (driver) { 1478 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1479 if (!(dev->flags & DF_EXTERNALSOFTC) && driver->size > 0) { 1480 dev->softc = malloc(driver->size, M_BUS_SC, 1481 M_NOWAIT | M_ZERO); 1482 if (!dev->softc) { 1483 kobj_delete((kobj_t) dev, 0); 1484 kobj_init((kobj_t) dev, &null_class); 1485 dev->driver = NULL; 1486 return (ENOMEM); 1487 } 1488 } 1489 } else { 1490 kobj_init((kobj_t) dev, &null_class); 1491 } 1492 1493 bus_data_generation_update(); 1494 return (0); 1495 } 1496 1497 int 1498 device_probe_and_attach(device_t dev) 1499 { 1500 device_t bus = dev->parent; 1501 int error = 0; 1502 int hasclass = (dev->devclass != 0); 1503 1504 if (dev->state >= DS_ALIVE) 1505 return (0); 1506 1507 if (dev->flags & DF_ENABLED) { 1508 error = device_probe_child(bus, dev); 1509 if (!error) { 1510 if (!device_is_quiet(dev)) 1511 device_print_child(bus, dev); 1512 error = DEVICE_ATTACH(dev); 1513 if (!error) { 1514 dev->state = DS_ATTACHED; 1515 devadded(dev); 1516 } else { 1517 printf("device_probe_and_attach: %s%d attach returned %d\n", 1518 dev->driver->name, dev->unit, error); 1519 /* Unset the class; set in device_probe_child */ 1520 if (!hasclass) 1521 device_set_devclass(dev, 0); 1522 device_set_driver(dev, NULL); 1523 dev->state = DS_NOTPRESENT; 1524 } 1525 } else { 1526 if (!(dev->flags & DF_DONENOMATCH)) { 1527 BUS_PROBE_NOMATCH(bus, dev); 1528 devnomatch(dev); 1529 dev->flags |= DF_DONENOMATCH; 1530 } 1531 } 1532 } else { 1533 if (bootverbose) { 1534 device_print_prettyname(dev); 1535 printf("not probed (disabled)\n"); 1536 } 1537 } 1538 1539 return (error); 1540 } 1541 1542 int 1543 device_detach(device_t dev) 1544 { 1545 int error; 1546 1547 PDEBUG(("%s", DEVICENAME(dev))); 1548 if (dev->state == DS_BUSY) 1549 return (EBUSY); 1550 if (dev->state != DS_ATTACHED) 1551 return (0); 1552 1553 if ((error = DEVICE_DETACH(dev)) != 0) 1554 return (error); 1555 devremoved(dev); 1556 device_printf(dev, "detached\n"); 1557 if (dev->parent) 1558 BUS_CHILD_DETACHED(dev->parent, dev); 1559 1560 if (!(dev->flags & DF_FIXEDCLASS)) 1561 devclass_delete_device(dev->devclass, dev); 1562 1563 dev->state = DS_NOTPRESENT; 1564 device_set_driver(dev, NULL); 1565 1566 return (0); 1567 } 1568 1569 int 1570 device_shutdown(device_t dev) 1571 { 1572 if (dev->state < DS_ATTACHED) 1573 return (0); 1574 return (DEVICE_SHUTDOWN(dev)); 1575 } 1576 1577 int 1578 device_set_unit(device_t dev, int unit) 1579 { 1580 devclass_t dc; 1581 int err; 1582 1583 dc = device_get_devclass(dev); 1584 if (unit < dc->maxunit && dc->devices[unit]) 1585 return (EBUSY); 1586 err = devclass_delete_device(dc, dev); 1587 if (err) 1588 return (err); 1589 dev->unit = unit; 1590 err = devclass_add_device(dc, dev); 1591 if (err) 1592 return (err); 1593 1594 bus_data_generation_update(); 1595 return (0); 1596 } 1597 1598 /*======================================*/ 1599 /* 1600 * Some useful method implementations to make life easier for bus drivers. 1601 */ 1602 1603 void 1604 resource_list_init(struct resource_list *rl) 1605 { 1606 SLIST_INIT(rl); 1607 } 1608 1609 void 1610 resource_list_free(struct resource_list *rl) 1611 { 1612 struct resource_list_entry *rle; 1613 1614 while ((rle = SLIST_FIRST(rl)) != NULL) { 1615 if (rle->res) 1616 panic("resource_list_free: resource entry is busy"); 1617 SLIST_REMOVE_HEAD(rl, link); 1618 free(rle, M_BUS); 1619 } 1620 } 1621 1622 int 1623 resource_list_add_next(struct resource_list *rl, int type, u_long start, 1624 u_long end, u_long count) 1625 { 1626 int rid; 1627 1628 rid = 0; 1629 while (resource_list_find(rl, type, rid) != NULL) 1630 rid++; 1631 resource_list_add(rl, type, rid, start, end, count); 1632 return (rid); 1633 } 1634 1635 void 1636 resource_list_add(struct resource_list *rl, int type, int rid, 1637 u_long start, u_long end, u_long count) 1638 { 1639 struct resource_list_entry *rle; 1640 1641 rle = resource_list_find(rl, type, rid); 1642 if (!rle) { 1643 rle = malloc(sizeof(struct resource_list_entry), M_BUS, 1644 M_NOWAIT); 1645 if (!rle) 1646 panic("resource_list_add: can't record entry"); 1647 SLIST_INSERT_HEAD(rl, rle, link); 1648 rle->type = type; 1649 rle->rid = rid; 1650 rle->res = NULL; 1651 } 1652 1653 if (rle->res) 1654 panic("resource_list_add: resource entry is busy"); 1655 1656 rle->start = start; 1657 rle->end = end; 1658 rle->count = count; 1659 } 1660 1661 struct resource_list_entry * 1662 resource_list_find(struct resource_list *rl, int type, int rid) 1663 { 1664 struct resource_list_entry *rle; 1665 1666 SLIST_FOREACH(rle, rl, link) { 1667 if (rle->type == type && rle->rid == rid) 1668 return (rle); 1669 } 1670 return (NULL); 1671 } 1672 1673 void 1674 resource_list_delete(struct resource_list *rl, int type, int rid) 1675 { 1676 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 1677 1678 if (rle) { 1679 if (rle->res != NULL) 1680 panic("resource_list_delete: resource has not been released"); 1681 SLIST_REMOVE(rl, rle, resource_list_entry, link); 1682 free(rle, M_BUS); 1683 } 1684 } 1685 1686 struct resource * 1687 resource_list_alloc(struct resource_list *rl, device_t bus, device_t child, 1688 int type, int *rid, u_long start, u_long end, u_long count, u_int flags) 1689 { 1690 struct resource_list_entry *rle = 0; 1691 int passthrough = (device_get_parent(child) != bus); 1692 int isdefault = (start == 0UL && end == ~0UL); 1693 1694 if (passthrough) { 1695 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1696 type, rid, start, end, count, flags)); 1697 } 1698 1699 rle = resource_list_find(rl, type, *rid); 1700 1701 if (!rle) 1702 return (NULL); /* no resource of that type/rid */ 1703 1704 if (rle->res) 1705 panic("resource_list_alloc: resource entry is busy"); 1706 1707 if (isdefault) { 1708 start = rle->start; 1709 count = ulmax(count, rle->count); 1710 end = ulmax(rle->end, start + count - 1); 1711 } 1712 1713 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 1714 type, rid, start, end, count, flags); 1715 1716 /* 1717 * Record the new range. 1718 */ 1719 if (rle->res) { 1720 rle->start = rman_get_start(rle->res); 1721 rle->end = rman_get_end(rle->res); 1722 rle->count = count; 1723 } 1724 1725 return (rle->res); 1726 } 1727 1728 int 1729 resource_list_release(struct resource_list *rl, device_t bus, device_t child, 1730 int type, int rid, struct resource *res) 1731 { 1732 struct resource_list_entry *rle = 0; 1733 int passthrough = (device_get_parent(child) != bus); 1734 int error; 1735 1736 if (passthrough) { 1737 return (BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1738 type, rid, res)); 1739 } 1740 1741 rle = resource_list_find(rl, type, rid); 1742 1743 if (!rle) 1744 panic("resource_list_release: can't find resource"); 1745 if (!rle->res) 1746 panic("resource_list_release: resource entry is not busy"); 1747 1748 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 1749 type, rid, res); 1750 if (error) 1751 return (error); 1752 1753 rle->res = NULL; 1754 return (0); 1755 } 1756 1757 int 1758 resource_list_print_type(struct resource_list *rl, const char *name, int type, 1759 const char *format) 1760 { 1761 struct resource_list_entry *rle; 1762 int printed, retval; 1763 1764 printed = 0; 1765 retval = 0; 1766 /* Yes, this is kinda cheating */ 1767 SLIST_FOREACH(rle, rl, link) { 1768 if (rle->type == type) { 1769 if (printed == 0) 1770 retval += printf(" %s ", name); 1771 else 1772 retval += printf(","); 1773 printed++; 1774 retval += printf(format, rle->start); 1775 if (rle->count > 1) { 1776 retval += printf("-"); 1777 retval += printf(format, rle->start + 1778 rle->count - 1); 1779 } 1780 } 1781 } 1782 return (retval); 1783 } 1784 1785 /* 1786 * Call DEVICE_IDENTIFY for each driver. 1787 */ 1788 int 1789 bus_generic_probe(device_t dev) 1790 { 1791 devclass_t dc = dev->devclass; 1792 driverlink_t dl; 1793 1794 TAILQ_FOREACH(dl, &dc->drivers, link) { 1795 DEVICE_IDENTIFY(dl->driver, dev); 1796 } 1797 1798 return (0); 1799 } 1800 1801 int 1802 bus_generic_attach(device_t dev) 1803 { 1804 device_t child; 1805 1806 TAILQ_FOREACH(child, &dev->children, link) { 1807 device_probe_and_attach(child); 1808 } 1809 1810 return (0); 1811 } 1812 1813 int 1814 bus_generic_detach(device_t dev) 1815 { 1816 device_t child; 1817 int error; 1818 1819 if (dev->state != DS_ATTACHED) 1820 return (EBUSY); 1821 1822 TAILQ_FOREACH(child, &dev->children, link) { 1823 if ((error = device_detach(child)) != 0) 1824 return (error); 1825 } 1826 1827 return (0); 1828 } 1829 1830 int 1831 bus_generic_shutdown(device_t dev) 1832 { 1833 device_t child; 1834 1835 TAILQ_FOREACH(child, &dev->children, link) { 1836 device_shutdown(child); 1837 } 1838 1839 return (0); 1840 } 1841 1842 int 1843 bus_generic_suspend(device_t dev) 1844 { 1845 int error; 1846 device_t child, child2; 1847 1848 TAILQ_FOREACH(child, &dev->children, link) { 1849 error = DEVICE_SUSPEND(child); 1850 if (error) { 1851 for (child2 = TAILQ_FIRST(&dev->children); 1852 child2 && child2 != child; 1853 child2 = TAILQ_NEXT(child2, link)) 1854 DEVICE_RESUME(child2); 1855 return (error); 1856 } 1857 } 1858 return (0); 1859 } 1860 1861 int 1862 bus_generic_resume(device_t dev) 1863 { 1864 device_t child; 1865 1866 TAILQ_FOREACH(child, &dev->children, link) { 1867 DEVICE_RESUME(child); 1868 /* if resume fails, there's nothing we can usefully do... */ 1869 } 1870 return (0); 1871 } 1872 1873 int 1874 bus_print_child_header(device_t dev, device_t child) 1875 { 1876 int retval = 0; 1877 1878 if (device_get_desc(child)) { 1879 retval += device_printf(child, "<%s>", device_get_desc(child)); 1880 } else { 1881 retval += printf("%s", device_get_nameunit(child)); 1882 } 1883 1884 return (retval); 1885 } 1886 1887 int 1888 bus_print_child_footer(device_t dev, device_t child) 1889 { 1890 return (printf(" on %s\n", device_get_nameunit(dev))); 1891 } 1892 1893 int 1894 bus_generic_print_child(device_t dev, device_t child) 1895 { 1896 int retval = 0; 1897 1898 retval += bus_print_child_header(dev, child); 1899 retval += bus_print_child_footer(dev, child); 1900 1901 return (retval); 1902 } 1903 1904 int 1905 bus_generic_read_ivar(device_t dev, device_t child, int index, 1906 uintptr_t * result) 1907 { 1908 return (ENOENT); 1909 } 1910 1911 int 1912 bus_generic_write_ivar(device_t dev, device_t child, int index, 1913 uintptr_t value) 1914 { 1915 return (ENOENT); 1916 } 1917 1918 struct resource_list * 1919 bus_generic_get_resource_list(device_t dev, device_t child) 1920 { 1921 return (NULL); 1922 } 1923 1924 void 1925 bus_generic_driver_added(device_t dev, driver_t *driver) 1926 { 1927 device_t child; 1928 1929 DEVICE_IDENTIFY(driver, dev); 1930 TAILQ_FOREACH(child, &dev->children, link) { 1931 if (child->state == DS_NOTPRESENT) 1932 device_probe_and_attach(child); 1933 } 1934 } 1935 1936 int 1937 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 1938 int flags, driver_intr_t *intr, void *arg, void **cookiep) 1939 { 1940 /* Propagate up the bus hierarchy until someone handles it. */ 1941 if (dev->parent) 1942 return (BUS_SETUP_INTR(dev->parent, child, irq, flags, 1943 intr, arg, cookiep)); 1944 return (EINVAL); 1945 } 1946 1947 int 1948 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 1949 void *cookie) 1950 { 1951 /* Propagate up the bus hierarchy until someone handles it. */ 1952 if (dev->parent) 1953 return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 1954 return (EINVAL); 1955 } 1956 1957 struct resource * 1958 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 1959 u_long start, u_long end, u_long count, u_int flags) 1960 { 1961 /* Propagate up the bus hierarchy until someone handles it. */ 1962 if (dev->parent) 1963 return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 1964 start, end, count, flags)); 1965 return (NULL); 1966 } 1967 1968 int 1969 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 1970 struct resource *r) 1971 { 1972 /* Propagate up the bus hierarchy until someone handles it. */ 1973 if (dev->parent) 1974 return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, 1975 r)); 1976 return (EINVAL); 1977 } 1978 1979 int 1980 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 1981 struct resource *r) 1982 { 1983 /* Propagate up the bus hierarchy until someone handles it. */ 1984 if (dev->parent) 1985 return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, 1986 r)); 1987 return (EINVAL); 1988 } 1989 1990 int 1991 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 1992 int rid, struct resource *r) 1993 { 1994 /* Propagate up the bus hierarchy until someone handles it. */ 1995 if (dev->parent) 1996 return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 1997 r)); 1998 return (EINVAL); 1999 } 2000 2001 int 2002 bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, 2003 enum intr_polarity pol) 2004 { 2005 2006 /* Propagate up the bus hierarchy until someone handles it. */ 2007 if (dev->parent) 2008 return (BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); 2009 return (EINVAL); 2010 } 2011 2012 int 2013 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 2014 u_long *startp, u_long *countp) 2015 { 2016 struct resource_list * rl = NULL; 2017 struct resource_list_entry * rle = NULL; 2018 2019 rl = BUS_GET_RESOURCE_LIST(dev, child); 2020 if (!rl) 2021 return (EINVAL); 2022 2023 rle = resource_list_find(rl, type, rid); 2024 if (!rle) 2025 return (ENOENT); 2026 2027 if (startp) 2028 *startp = rle->start; 2029 if (countp) 2030 *countp = rle->count; 2031 2032 return (0); 2033 } 2034 2035 int 2036 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 2037 u_long start, u_long count) 2038 { 2039 struct resource_list * rl = NULL; 2040 2041 rl = BUS_GET_RESOURCE_LIST(dev, child); 2042 if (!rl) 2043 return (EINVAL); 2044 2045 resource_list_add(rl, type, rid, start, (start + count - 1), count); 2046 2047 return (0); 2048 } 2049 2050 void 2051 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 2052 { 2053 struct resource_list * rl = NULL; 2054 2055 rl = BUS_GET_RESOURCE_LIST(dev, child); 2056 if (!rl) 2057 return; 2058 2059 resource_list_delete(rl, type, rid); 2060 2061 return; 2062 } 2063 2064 int 2065 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 2066 int rid, struct resource *r) 2067 { 2068 struct resource_list * rl = NULL; 2069 2070 rl = BUS_GET_RESOURCE_LIST(dev, child); 2071 if (!rl) 2072 return (EINVAL); 2073 2074 return (resource_list_release(rl, dev, child, type, rid, r)); 2075 } 2076 2077 struct resource * 2078 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 2079 int *rid, u_long start, u_long end, u_long count, u_int flags) 2080 { 2081 struct resource_list * rl = NULL; 2082 2083 rl = BUS_GET_RESOURCE_LIST(dev, child); 2084 if (!rl) 2085 return (NULL); 2086 2087 return (resource_list_alloc(rl, dev, child, type, rid, 2088 start, end, count, flags)); 2089 } 2090 2091 int 2092 bus_generic_child_present(device_t bus, device_t child) 2093 { 2094 return (BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 2095 } 2096 2097 /* 2098 * Some convenience functions to make it easier for drivers to use the 2099 * resource-management functions. All these really do is hide the 2100 * indirection through the parent's method table, making for slightly 2101 * less-wordy code. In the future, it might make sense for this code 2102 * to maintain some sort of a list of resources allocated by each device. 2103 */ 2104 struct resource * 2105 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 2106 u_long count, u_int flags) 2107 { 2108 if (dev->parent == 0) 2109 return (0); 2110 return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 2111 count, flags)); 2112 } 2113 2114 int 2115 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 2116 { 2117 if (dev->parent == 0) 2118 return (EINVAL); 2119 return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2120 } 2121 2122 int 2123 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 2124 { 2125 if (dev->parent == 0) 2126 return (EINVAL); 2127 return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 2128 } 2129 2130 int 2131 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 2132 { 2133 if (dev->parent == 0) 2134 return (EINVAL); 2135 return (BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 2136 } 2137 2138 int 2139 bus_setup_intr(device_t dev, struct resource *r, int flags, 2140 driver_intr_t handler, void *arg, void **cookiep) 2141 { 2142 int error; 2143 2144 if (dev->parent != 0) { 2145 if ((flags &~ INTR_ENTROPY) == (INTR_TYPE_NET | INTR_MPSAFE) && 2146 !debug_mpsafenet) 2147 flags &= ~INTR_MPSAFE; 2148 error = BUS_SETUP_INTR(dev->parent, dev, r, flags, 2149 handler, arg, cookiep); 2150 if (error == 0) { 2151 if (!(flags & (INTR_MPSAFE | INTR_FAST))) 2152 device_printf(dev, "[GIANT-LOCKED]\n"); 2153 if (bootverbose && (flags & INTR_MPSAFE)) 2154 device_printf(dev, "[MPSAFE]\n"); 2155 if (flags & INTR_FAST) 2156 device_printf(dev, "[FAST]\n"); 2157 } 2158 } else 2159 error = EINVAL; 2160 return (error); 2161 } 2162 2163 int 2164 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 2165 { 2166 if (dev->parent == 0) 2167 return (EINVAL); 2168 return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 2169 } 2170 2171 int 2172 bus_set_resource(device_t dev, int type, int rid, 2173 u_long start, u_long count) 2174 { 2175 return (BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 2176 start, count)); 2177 } 2178 2179 int 2180 bus_get_resource(device_t dev, int type, int rid, 2181 u_long *startp, u_long *countp) 2182 { 2183 return (BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2184 startp, countp)); 2185 } 2186 2187 u_long 2188 bus_get_resource_start(device_t dev, int type, int rid) 2189 { 2190 u_long start, count; 2191 int error; 2192 2193 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2194 &start, &count); 2195 if (error) 2196 return (0); 2197 return (start); 2198 } 2199 2200 u_long 2201 bus_get_resource_count(device_t dev, int type, int rid) 2202 { 2203 u_long start, count; 2204 int error; 2205 2206 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 2207 &start, &count); 2208 if (error) 2209 return (0); 2210 return (count); 2211 } 2212 2213 void 2214 bus_delete_resource(device_t dev, int type, int rid) 2215 { 2216 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 2217 } 2218 2219 int 2220 bus_child_present(device_t child) 2221 { 2222 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 2223 } 2224 2225 int 2226 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 2227 { 2228 device_t parent; 2229 2230 parent = device_get_parent(child); 2231 if (parent == NULL) { 2232 *buf = '\0'; 2233 return (0); 2234 } 2235 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 2236 } 2237 2238 int 2239 bus_child_location_str(device_t child, char *buf, size_t buflen) 2240 { 2241 device_t parent; 2242 2243 parent = device_get_parent(child); 2244 if (parent == NULL) { 2245 *buf = '\0'; 2246 return (0); 2247 } 2248 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 2249 } 2250 2251 static int 2252 root_print_child(device_t dev, device_t child) 2253 { 2254 int retval = 0; 2255 2256 retval += bus_print_child_header(dev, child); 2257 retval += printf("\n"); 2258 2259 return (retval); 2260 } 2261 2262 static int 2263 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 2264 void **cookiep) 2265 { 2266 /* 2267 * If an interrupt mapping gets to here something bad has happened. 2268 */ 2269 panic("root_setup_intr"); 2270 } 2271 2272 /* 2273 * If we get here, assume that the device is permanant and really is 2274 * present in the system. Removable bus drivers are expected to intercept 2275 * this call long before it gets here. We return -1 so that drivers that 2276 * really care can check vs -1 or some ERRNO returned higher in the food 2277 * chain. 2278 */ 2279 static int 2280 root_child_present(device_t dev, device_t child) 2281 { 2282 return (-1); 2283 } 2284 2285 static kobj_method_t root_methods[] = { 2286 /* Device interface */ 2287 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 2288 KOBJMETHOD(device_suspend, bus_generic_suspend), 2289 KOBJMETHOD(device_resume, bus_generic_resume), 2290 2291 /* Bus interface */ 2292 KOBJMETHOD(bus_print_child, root_print_child), 2293 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 2294 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 2295 KOBJMETHOD(bus_setup_intr, root_setup_intr), 2296 KOBJMETHOD(bus_child_present, root_child_present), 2297 2298 { 0, 0 } 2299 }; 2300 2301 static driver_t root_driver = { 2302 "root", 2303 root_methods, 2304 1, /* no softc */ 2305 }; 2306 2307 device_t root_bus; 2308 devclass_t root_devclass; 2309 2310 static int 2311 root_bus_module_handler(module_t mod, int what, void* arg) 2312 { 2313 switch (what) { 2314 case MOD_LOAD: 2315 TAILQ_INIT(&bus_data_devices); 2316 kobj_class_compile((kobj_class_t) &root_driver); 2317 root_bus = make_device(NULL, "root", 0); 2318 root_bus->desc = "System root bus"; 2319 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 2320 root_bus->driver = &root_driver; 2321 root_bus->state = DS_ATTACHED; 2322 root_devclass = devclass_find_internal("root", 0, FALSE); 2323 devinit(); 2324 return (0); 2325 2326 case MOD_SHUTDOWN: 2327 device_shutdown(root_bus); 2328 return (0); 2329 } 2330 2331 return (0); 2332 } 2333 2334 static moduledata_t root_bus_mod = { 2335 "rootbus", 2336 root_bus_module_handler, 2337 0 2338 }; 2339 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 2340 2341 void 2342 root_bus_configure(void) 2343 { 2344 device_t dev; 2345 2346 PDEBUG((".")); 2347 2348 TAILQ_FOREACH(dev, &root_bus->children, link) { 2349 device_probe_and_attach(dev); 2350 } 2351 } 2352 2353 int 2354 driver_module_handler(module_t mod, int what, void *arg) 2355 { 2356 int error; 2357 struct driver_module_data *dmd; 2358 devclass_t bus_devclass; 2359 kobj_class_t driver; 2360 2361 dmd = (struct driver_module_data *)arg; 2362 bus_devclass = devclass_find_internal(dmd->dmd_busname, 0, TRUE); 2363 error = 0; 2364 2365 switch (what) { 2366 case MOD_LOAD: 2367 if (dmd->dmd_chainevh) 2368 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2369 2370 driver = dmd->dmd_driver; 2371 PDEBUG(("Loading module: driver %s on bus %s", 2372 DRIVERNAME(driver), dmd->dmd_busname)); 2373 error = devclass_add_driver(bus_devclass, driver); 2374 if (error) 2375 break; 2376 2377 /* 2378 * If the driver has any base classes, make the 2379 * devclass inherit from the devclass of the driver's 2380 * first base class. This will allow the system to 2381 * search for drivers in both devclasses for children 2382 * of a device using this driver. 2383 */ 2384 if (driver->baseclasses) { 2385 const char *parentname; 2386 parentname = driver->baseclasses[0]->name; 2387 *dmd->dmd_devclass = 2388 devclass_find_internal(driver->name, 2389 parentname, TRUE); 2390 } else { 2391 *dmd->dmd_devclass = 2392 devclass_find_internal(driver->name, 0, TRUE); 2393 } 2394 break; 2395 2396 case MOD_UNLOAD: 2397 PDEBUG(("Unloading module: driver %s from bus %s", 2398 DRIVERNAME(dmd->dmd_driver), 2399 dmd->dmd_busname)); 2400 error = devclass_delete_driver(bus_devclass, 2401 dmd->dmd_driver); 2402 2403 if (!error && dmd->dmd_chainevh) 2404 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 2405 break; 2406 } 2407 2408 return (error); 2409 } 2410 2411 #ifdef BUS_DEBUG 2412 2413 /* the _short versions avoid iteration by not calling anything that prints 2414 * more than oneliners. I love oneliners. 2415 */ 2416 2417 static void 2418 print_device_short(device_t dev, int indent) 2419 { 2420 if (!dev) 2421 return; 2422 2423 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 2424 dev->unit, dev->desc, 2425 (dev->parent? "":"no "), 2426 (TAILQ_EMPTY(&dev->children)? "no ":""), 2427 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 2428 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 2429 (dev->flags&DF_WILDCARD? "wildcard,":""), 2430 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 2431 (dev->ivars? "":"no "), 2432 (dev->softc? "":"no "), 2433 dev->busy)); 2434 } 2435 2436 static void 2437 print_device(device_t dev, int indent) 2438 { 2439 if (!dev) 2440 return; 2441 2442 print_device_short(dev, indent); 2443 2444 indentprintf(("Parent:\n")); 2445 print_device_short(dev->parent, indent+1); 2446 indentprintf(("Driver:\n")); 2447 print_driver_short(dev->driver, indent+1); 2448 indentprintf(("Devclass:\n")); 2449 print_devclass_short(dev->devclass, indent+1); 2450 } 2451 2452 void 2453 print_device_tree_short(device_t dev, int indent) 2454 /* print the device and all its children (indented) */ 2455 { 2456 device_t child; 2457 2458 if (!dev) 2459 return; 2460 2461 print_device_short(dev, indent); 2462 2463 TAILQ_FOREACH(child, &dev->children, link) { 2464 print_device_tree_short(child, indent+1); 2465 } 2466 } 2467 2468 void 2469 print_device_tree(device_t dev, int indent) 2470 /* print the device and all its children (indented) */ 2471 { 2472 device_t child; 2473 2474 if (!dev) 2475 return; 2476 2477 print_device(dev, indent); 2478 2479 TAILQ_FOREACH(child, &dev->children, link) { 2480 print_device_tree(child, indent+1); 2481 } 2482 } 2483 2484 static void 2485 print_driver_short(driver_t *driver, int indent) 2486 { 2487 if (!driver) 2488 return; 2489 2490 indentprintf(("driver %s: softc size = %zd\n", 2491 driver->name, driver->size)); 2492 } 2493 2494 static void 2495 print_driver(driver_t *driver, int indent) 2496 { 2497 if (!driver) 2498 return; 2499 2500 print_driver_short(driver, indent); 2501 } 2502 2503 2504 static void 2505 print_driver_list(driver_list_t drivers, int indent) 2506 { 2507 driverlink_t driver; 2508 2509 TAILQ_FOREACH(driver, &drivers, link) { 2510 print_driver(driver->driver, indent); 2511 } 2512 } 2513 2514 static void 2515 print_devclass_short(devclass_t dc, int indent) 2516 { 2517 if ( !dc ) 2518 return; 2519 2520 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 2521 } 2522 2523 static void 2524 print_devclass(devclass_t dc, int indent) 2525 { 2526 int i; 2527 2528 if ( !dc ) 2529 return; 2530 2531 print_devclass_short(dc, indent); 2532 indentprintf(("Drivers:\n")); 2533 print_driver_list(dc->drivers, indent+1); 2534 2535 indentprintf(("Devices:\n")); 2536 for (i = 0; i < dc->maxunit; i++) 2537 if (dc->devices[i]) 2538 print_device(dc->devices[i], indent+1); 2539 } 2540 2541 void 2542 print_devclass_list_short(void) 2543 { 2544 devclass_t dc; 2545 2546 printf("Short listing of devclasses, drivers & devices:\n"); 2547 TAILQ_FOREACH(dc, &devclasses, link) { 2548 print_devclass_short(dc, 0); 2549 } 2550 } 2551 2552 void 2553 print_devclass_list(void) 2554 { 2555 devclass_t dc; 2556 2557 printf("Full listing of devclasses, drivers & devices:\n"); 2558 TAILQ_FOREACH(dc, &devclasses, link) { 2559 print_devclass(dc, 0); 2560 } 2561 } 2562 2563 #endif 2564 2565 /* 2566 * User-space access to the device tree. 2567 * 2568 * We implement a small set of nodes: 2569 * 2570 * hw.bus Single integer read method to obtain the 2571 * current generation count. 2572 * hw.bus.devices Reads the entire device tree in flat space. 2573 * hw.bus.rman Resource manager interface 2574 * 2575 * We might like to add the ability to scan devclasses and/or drivers to 2576 * determine what else is currently loaded/available. 2577 */ 2578 2579 static int 2580 sysctl_bus(SYSCTL_HANDLER_ARGS) 2581 { 2582 struct u_businfo ubus; 2583 2584 ubus.ub_version = BUS_USER_VERSION; 2585 ubus.ub_generation = bus_data_generation; 2586 2587 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 2588 } 2589 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 2590 "bus-related data"); 2591 2592 static int 2593 sysctl_devices(SYSCTL_HANDLER_ARGS) 2594 { 2595 int *name = (int *)arg1; 2596 u_int namelen = arg2; 2597 int index; 2598 struct device *dev; 2599 struct u_device udev; /* XXX this is a bit big */ 2600 int error; 2601 2602 if (namelen != 2) 2603 return (EINVAL); 2604 2605 if (bus_data_generation_check(name[0])) 2606 return (EINVAL); 2607 2608 index = name[1]; 2609 2610 /* 2611 * Scan the list of devices, looking for the requested index. 2612 */ 2613 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 2614 if (index-- == 0) 2615 break; 2616 } 2617 if (dev == NULL) 2618 return (ENOENT); 2619 2620 /* 2621 * Populate the return array. 2622 */ 2623 udev.dv_handle = (uintptr_t)dev; 2624 udev.dv_parent = (uintptr_t)dev->parent; 2625 if (dev->nameunit == NULL) 2626 udev.dv_name[0] = '\0'; 2627 else 2628 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 2629 2630 if (dev->desc == NULL) 2631 udev.dv_desc[0] = '\0'; 2632 else 2633 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 2634 if (dev->driver == NULL || dev->driver->name == NULL) 2635 udev.dv_drivername[0] = '\0'; 2636 else 2637 strlcpy(udev.dv_drivername, dev->driver->name, 2638 sizeof(udev.dv_drivername)); 2639 udev.dv_pnpinfo[0] = '\0'; 2640 udev.dv_location[0] = '\0'; 2641 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 2642 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 2643 udev.dv_devflags = dev->devflags; 2644 udev.dv_flags = dev->flags; 2645 udev.dv_state = dev->state; 2646 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 2647 return (error); 2648 } 2649 2650 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 2651 "system device tree"); 2652 2653 /* 2654 * Sysctl interface for scanning the resource lists. 2655 * 2656 * We take two input parameters; the index into the list of resource 2657 * managers, and the resource offset into the list. 2658 */ 2659 static int 2660 sysctl_rman(SYSCTL_HANDLER_ARGS) 2661 { 2662 int *name = (int *)arg1; 2663 u_int namelen = arg2; 2664 int rman_idx, res_idx; 2665 struct rman *rm; 2666 struct resource *res; 2667 struct u_rman urm; 2668 struct u_resource ures; 2669 int error; 2670 2671 if (namelen != 3) 2672 return (EINVAL); 2673 2674 if (bus_data_generation_check(name[0])) 2675 return (EINVAL); 2676 rman_idx = name[1]; 2677 res_idx = name[2]; 2678 2679 /* 2680 * Find the indexed resource manager 2681 */ 2682 TAILQ_FOREACH(rm, &rman_head, rm_link) { 2683 if (rman_idx-- == 0) 2684 break; 2685 } 2686 if (rm == NULL) 2687 return (ENOENT); 2688 2689 /* 2690 * If the resource index is -1, we want details on the 2691 * resource manager. 2692 */ 2693 if (res_idx == -1) { 2694 urm.rm_handle = (uintptr_t)rm; 2695 strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN); 2696 urm.rm_start = rm->rm_start; 2697 urm.rm_size = rm->rm_end - rm->rm_start + 1; 2698 urm.rm_type = rm->rm_type; 2699 2700 error = SYSCTL_OUT(req, &urm, sizeof(urm)); 2701 return (error); 2702 } 2703 2704 /* 2705 * Find the indexed resource and return it. 2706 */ 2707 TAILQ_FOREACH(res, &rm->rm_list, r_link) { 2708 if (res_idx-- == 0) { 2709 ures.r_handle = (uintptr_t)res; 2710 ures.r_parent = (uintptr_t)res->r_rm; 2711 ures.r_device = (uintptr_t)res->r_dev; 2712 if (res->r_dev != NULL) { 2713 if (device_get_name(res->r_dev) != NULL) { 2714 snprintf(ures.r_devname, RM_TEXTLEN, 2715 "%s%d", 2716 device_get_name(res->r_dev), 2717 device_get_unit(res->r_dev)); 2718 } else { 2719 strlcpy(ures.r_devname, "nomatch", 2720 RM_TEXTLEN); 2721 } 2722 } else { 2723 ures.r_devname[0] = '\0'; 2724 } 2725 ures.r_start = res->r_start; 2726 ures.r_size = res->r_end - res->r_start + 1; 2727 ures.r_flags = res->r_flags; 2728 2729 error = SYSCTL_OUT(req, &ures, sizeof(ures)); 2730 return (error); 2731 } 2732 } 2733 return (ENOENT); 2734 } 2735 2736 SYSCTL_NODE(_hw_bus, OID_AUTO, rman, CTLFLAG_RD, sysctl_rman, 2737 "kernel resource manager"); 2738 2739 int 2740 bus_data_generation_check(int generation) 2741 { 2742 if (generation != bus_data_generation) 2743 return (1); 2744 2745 /* XXX generate optimised lists here? */ 2746 return (0); 2747 } 2748 2749 void 2750 bus_data_generation_update(void) 2751 { 2752 bus_data_generation++; 2753 } 2754