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