1 /* 2 * Copyright (c) 1997,1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/kern/subr_bus.c,v 1.54.2.9 2002/10/10 15:13:32 jhb Exp $ 27 */ 28 29 #include "opt_bus.h" 30 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/kobj.h> 37 #include <sys/bus_private.h> 38 #include <sys/sysctl.h> 39 #include <sys/systm.h> 40 #include <sys/bus.h> 41 #include <sys/rman.h> 42 #include <sys/device.h> 43 #include <sys/lock.h> 44 #include <sys/conf.h> 45 #include <sys/uio.h> 46 #include <sys/filio.h> 47 #include <sys/event.h> 48 #include <sys/signalvar.h> 49 #include <sys/machintr.h> 50 #include <sys/vnode.h> 51 52 #include <machine/stdarg.h> /* for device_printf() */ 53 54 SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); 55 SYSCTL_NODE(, OID_AUTO, dev, CTLFLAG_RW, NULL, NULL); 56 57 MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); 58 59 #ifdef BUS_DEBUG 60 #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n")) 61 #define DEVICENAME(d) ((d)? device_get_name(d): "no device") 62 #define DRIVERNAME(d) ((d)? d->name : "no driver") 63 #define DEVCLANAME(d) ((d)? d->name : "no devclass") 64 65 /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to 66 * prevent syslog from deleting initial spaces 67 */ 68 #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0) 69 70 static void print_device_short(device_t dev, int indent); 71 static void print_device(device_t dev, int indent); 72 void print_device_tree_short(device_t dev, int indent); 73 void print_device_tree(device_t dev, int indent); 74 static void print_driver_short(driver_t *driver, int indent); 75 static void print_driver(driver_t *driver, int indent); 76 static void print_driver_list(driver_list_t drivers, int indent); 77 static void print_devclass_short(devclass_t dc, int indent); 78 static void print_devclass(devclass_t dc, int indent); 79 void print_devclass_list_short(void); 80 void print_devclass_list(void); 81 82 #else 83 /* Make the compiler ignore the function calls */ 84 #define PDEBUG(a) /* nop */ 85 #define DEVICENAME(d) /* nop */ 86 #define DRIVERNAME(d) /* nop */ 87 #define DEVCLANAME(d) /* nop */ 88 89 #define print_device_short(d,i) /* nop */ 90 #define print_device(d,i) /* nop */ 91 #define print_device_tree_short(d,i) /* nop */ 92 #define print_device_tree(d,i) /* nop */ 93 #define print_driver_short(d,i) /* nop */ 94 #define print_driver(d,i) /* nop */ 95 #define print_driver_list(d,i) /* nop */ 96 #define print_devclass_short(d,i) /* nop */ 97 #define print_devclass(d,i) /* nop */ 98 #define print_devclass_list_short() /* nop */ 99 #define print_devclass_list() /* nop */ 100 #endif 101 102 /* 103 * dev sysctl tree 104 */ 105 106 enum { 107 DEVCLASS_SYSCTL_PARENT, 108 }; 109 110 static int 111 devclass_sysctl_handler(SYSCTL_HANDLER_ARGS) 112 { 113 devclass_t dc = (devclass_t)arg1; 114 const char *value; 115 116 switch (arg2) { 117 case DEVCLASS_SYSCTL_PARENT: 118 value = dc->parent ? dc->parent->name : ""; 119 break; 120 default: 121 return (EINVAL); 122 } 123 return (SYSCTL_OUT(req, value, strlen(value))); 124 } 125 126 static void 127 devclass_sysctl_init(devclass_t dc) 128 { 129 130 if (dc->sysctl_tree != NULL) 131 return; 132 sysctl_ctx_init(&dc->sysctl_ctx); 133 dc->sysctl_tree = SYSCTL_ADD_NODE(&dc->sysctl_ctx, 134 SYSCTL_STATIC_CHILDREN(_dev), OID_AUTO, dc->name, 135 CTLFLAG_RD, NULL, ""); 136 SYSCTL_ADD_PROC(&dc->sysctl_ctx, SYSCTL_CHILDREN(dc->sysctl_tree), 137 OID_AUTO, "%parent", CTLTYPE_STRING | CTLFLAG_RD, 138 dc, DEVCLASS_SYSCTL_PARENT, devclass_sysctl_handler, "A", 139 "parent class"); 140 } 141 142 enum { 143 DEVICE_SYSCTL_DESC, 144 DEVICE_SYSCTL_DRIVER, 145 DEVICE_SYSCTL_LOCATION, 146 DEVICE_SYSCTL_PNPINFO, 147 DEVICE_SYSCTL_PARENT, 148 }; 149 150 static int 151 device_sysctl_handler(SYSCTL_HANDLER_ARGS) 152 { 153 device_t dev = (device_t)arg1; 154 const char *value; 155 char *buf; 156 int error; 157 158 buf = NULL; 159 switch (arg2) { 160 case DEVICE_SYSCTL_DESC: 161 value = dev->desc ? dev->desc : ""; 162 break; 163 case DEVICE_SYSCTL_DRIVER: 164 value = dev->driver ? dev->driver->name : ""; 165 break; 166 case DEVICE_SYSCTL_LOCATION: 167 value = buf = kmalloc(1024, M_BUS, M_WAITOK | M_ZERO); 168 bus_child_location_str(dev, buf, 1024); 169 break; 170 case DEVICE_SYSCTL_PNPINFO: 171 value = buf = kmalloc(1024, M_BUS, M_WAITOK | M_ZERO); 172 bus_child_pnpinfo_str(dev, buf, 1024); 173 break; 174 case DEVICE_SYSCTL_PARENT: 175 value = dev->parent ? dev->parent->nameunit : ""; 176 break; 177 default: 178 return (EINVAL); 179 } 180 error = SYSCTL_OUT(req, value, strlen(value)); 181 if (buf != NULL) 182 kfree(buf, M_BUS); 183 return (error); 184 } 185 186 static void 187 device_sysctl_init(device_t dev) 188 { 189 devclass_t dc = dev->devclass; 190 191 if (dev->sysctl_tree != NULL) 192 return; 193 devclass_sysctl_init(dc); 194 sysctl_ctx_init(&dev->sysctl_ctx); 195 dev->sysctl_tree = SYSCTL_ADD_NODE(&dev->sysctl_ctx, 196 SYSCTL_CHILDREN(dc->sysctl_tree), OID_AUTO, 197 dev->nameunit + strlen(dc->name), 198 CTLFLAG_RD, NULL, ""); 199 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree), 200 OID_AUTO, "%desc", CTLTYPE_STRING | CTLFLAG_RD, 201 dev, DEVICE_SYSCTL_DESC, device_sysctl_handler, "A", 202 "device description"); 203 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree), 204 OID_AUTO, "%driver", CTLTYPE_STRING | CTLFLAG_RD, 205 dev, DEVICE_SYSCTL_DRIVER, device_sysctl_handler, "A", 206 "device driver name"); 207 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree), 208 OID_AUTO, "%location", CTLTYPE_STRING | CTLFLAG_RD, 209 dev, DEVICE_SYSCTL_LOCATION, device_sysctl_handler, "A", 210 "device location relative to parent"); 211 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree), 212 OID_AUTO, "%pnpinfo", CTLTYPE_STRING | CTLFLAG_RD, 213 dev, DEVICE_SYSCTL_PNPINFO, device_sysctl_handler, "A", 214 "device identification"); 215 SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree), 216 OID_AUTO, "%parent", CTLTYPE_STRING | CTLFLAG_RD, 217 dev, DEVICE_SYSCTL_PARENT, device_sysctl_handler, "A", 218 "parent device"); 219 } 220 221 static void 222 device_sysctl_update(device_t dev) 223 { 224 devclass_t dc = dev->devclass; 225 226 if (dev->sysctl_tree == NULL) 227 return; 228 sysctl_rename_oid(dev->sysctl_tree, dev->nameunit + strlen(dc->name)); 229 } 230 231 static void 232 device_sysctl_fini(device_t dev) 233 { 234 if (dev->sysctl_tree == NULL) 235 return; 236 sysctl_ctx_free(&dev->sysctl_ctx); 237 dev->sysctl_tree = NULL; 238 } 239 240 static void device_attach_async(device_t dev); 241 static void device_attach_thread(void *arg); 242 static int device_doattach(device_t dev); 243 244 static int do_async_attach = 0; 245 static int numasyncthreads; 246 TUNABLE_INT("kern.do_async_attach", &do_async_attach); 247 248 /* 249 * /dev/devctl implementation 250 */ 251 252 /* 253 * This design allows only one reader for /dev/devctl. This is not desirable 254 * in the long run, but will get a lot of hair out of this implementation. 255 * Maybe we should make this device a clonable device. 256 * 257 * Also note: we specifically do not attach a device to the device_t tree 258 * to avoid potential chicken and egg problems. One could argue that all 259 * of this belongs to the root node. One could also further argue that the 260 * sysctl interface that we have not might more properly be an ioctl 261 * interface, but at this stage of the game, I'm not inclined to rock that 262 * boat. 263 * 264 * I'm also not sure that the SIGIO support is done correctly or not, as 265 * I copied it from a driver that had SIGIO support that likely hasn't been 266 * tested since 3.4 or 2.2.8! 267 */ 268 269 static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); 270 static int devctl_disable = 0; 271 TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); 272 SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0, 273 sysctl_devctl_disable, "I", "devctl disable"); 274 275 static d_open_t devopen; 276 static d_close_t devclose; 277 static d_read_t devread; 278 static d_ioctl_t devioctl; 279 static d_kqfilter_t devkqfilter; 280 281 static struct dev_ops devctl_ops = { 282 { "devctl", 0, D_MPSAFE }, 283 .d_open = devopen, 284 .d_close = devclose, 285 .d_read = devread, 286 .d_ioctl = devioctl, 287 .d_kqfilter = devkqfilter 288 }; 289 290 struct dev_event_info 291 { 292 char *dei_data; 293 TAILQ_ENTRY(dev_event_info) dei_link; 294 }; 295 296 TAILQ_HEAD(devq, dev_event_info); 297 298 static struct dev_softc 299 { 300 int inuse; 301 struct lock lock; 302 struct kqinfo kq; 303 struct devq devq; 304 struct proc *async_proc; 305 } devsoftc; 306 307 /* 308 * Chicken-and-egg problem with devfs, get the queue operational early. 309 */ 310 static void 311 predevinit(void) 312 { 313 lockinit(&devsoftc.lock, "dev mtx", 0, 0); 314 TAILQ_INIT(&devsoftc.devq); 315 } 316 SYSINIT(predevinit, SI_SUB_CREATE_INIT, SI_ORDER_ANY, predevinit, 0); 317 318 static void 319 devinit(void) 320 { 321 /* 322 * WARNING! make_dev() can call back into devctl_queue_data() 323 * immediately. 324 */ 325 make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl"); 326 } 327 328 static int 329 devopen(struct dev_open_args *ap) 330 { 331 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 332 if (devsoftc.inuse) { 333 lockmgr(&devsoftc.lock, LK_RELEASE); 334 return (EBUSY); 335 } 336 /* move to init */ 337 devsoftc.inuse = 1; 338 devsoftc.async_proc = NULL; 339 lockmgr(&devsoftc.lock, LK_RELEASE); 340 341 return (0); 342 } 343 344 static int 345 devclose(struct dev_close_args *ap) 346 { 347 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 348 devsoftc.inuse = 0; 349 wakeup(&devsoftc); 350 lockmgr(&devsoftc.lock, LK_RELEASE); 351 352 return (0); 353 } 354 355 /* 356 * The read channel for this device is used to report changes to 357 * userland in realtime. We are required to free the data as well as 358 * the n1 object because we allocate them separately. Also note that 359 * we return one record at a time. If you try to read this device a 360 * character at a time, you will lose the rest of the data. Listening 361 * programs are expected to cope. 362 */ 363 static int 364 devread(struct dev_read_args *ap) 365 { 366 struct uio *uio = ap->a_uio; 367 struct dev_event_info *n1; 368 int rv; 369 370 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 371 while (TAILQ_EMPTY(&devsoftc.devq)) { 372 if (ap->a_ioflag & IO_NDELAY) { 373 lockmgr(&devsoftc.lock, LK_RELEASE); 374 return (EAGAIN); 375 } 376 tsleep_interlock(&devsoftc, PCATCH); 377 lockmgr(&devsoftc.lock, LK_RELEASE); 378 rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0); 379 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 380 if (rv) { 381 /* 382 * Need to translate ERESTART to EINTR here? -- jake 383 */ 384 lockmgr(&devsoftc.lock, LK_RELEASE); 385 return (rv); 386 } 387 } 388 n1 = TAILQ_FIRST(&devsoftc.devq); 389 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 390 lockmgr(&devsoftc.lock, LK_RELEASE); 391 rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); 392 kfree(n1->dei_data, M_BUS); 393 kfree(n1, M_BUS); 394 return (rv); 395 } 396 397 static int 398 devioctl(struct dev_ioctl_args *ap) 399 { 400 switch (ap->a_cmd) { 401 402 case FIONBIO: 403 return (0); 404 case FIOASYNC: 405 if (*(int*)ap->a_data) 406 devsoftc.async_proc = curproc; 407 else 408 devsoftc.async_proc = NULL; 409 return (0); 410 411 /* (un)Support for other fcntl() calls. */ 412 case FIOCLEX: 413 case FIONCLEX: 414 case FIONREAD: 415 case FIOSETOWN: 416 case FIOGETOWN: 417 default: 418 break; 419 } 420 return (ENOTTY); 421 } 422 423 static void dev_filter_detach(struct knote *); 424 static int dev_filter_read(struct knote *, long); 425 426 static struct filterops dev_filtops = 427 { FILTEROP_ISFD | FILTEROP_MPSAFE, NULL, 428 dev_filter_detach, dev_filter_read }; 429 430 static int 431 devkqfilter(struct dev_kqfilter_args *ap) 432 { 433 struct knote *kn = ap->a_kn; 434 struct klist *klist; 435 436 ap->a_result = 0; 437 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 438 439 switch (kn->kn_filter) { 440 case EVFILT_READ: 441 kn->kn_fop = &dev_filtops; 442 break; 443 default: 444 ap->a_result = EOPNOTSUPP; 445 lockmgr(&devsoftc.lock, LK_RELEASE); 446 return (0); 447 } 448 449 klist = &devsoftc.kq.ki_note; 450 knote_insert(klist, kn); 451 452 lockmgr(&devsoftc.lock, LK_RELEASE); 453 454 return (0); 455 } 456 457 static void 458 dev_filter_detach(struct knote *kn) 459 { 460 struct klist *klist; 461 462 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 463 klist = &devsoftc.kq.ki_note; 464 knote_remove(klist, kn); 465 lockmgr(&devsoftc.lock, LK_RELEASE); 466 } 467 468 static int 469 dev_filter_read(struct knote *kn, long hint) 470 { 471 int ready = 0; 472 473 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 474 if (!TAILQ_EMPTY(&devsoftc.devq)) 475 ready = 1; 476 lockmgr(&devsoftc.lock, LK_RELEASE); 477 478 return (ready); 479 } 480 481 482 /** 483 * @brief Return whether the userland process is running 484 */ 485 boolean_t 486 devctl_process_running(void) 487 { 488 return (devsoftc.inuse == 1); 489 } 490 491 /** 492 * @brief Queue data to be read from the devctl device 493 * 494 * Generic interface to queue data to the devctl device. It is 495 * assumed that @p data is properly formatted. It is further assumed 496 * that @p data is allocated using the M_BUS malloc type. 497 */ 498 void 499 devctl_queue_data(char *data) 500 { 501 struct dev_event_info *n1 = NULL; 502 struct proc *p; 503 504 n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT); 505 if (n1 == NULL) 506 return; 507 n1->dei_data = data; 508 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 509 TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); 510 wakeup(&devsoftc); 511 lockmgr(&devsoftc.lock, LK_RELEASE); 512 KNOTE(&devsoftc.kq.ki_note, 0); 513 p = devsoftc.async_proc; 514 if (p != NULL) 515 ksignal(p, SIGIO); 516 } 517 518 /** 519 * @brief Send a 'notification' to userland, using standard ways 520 */ 521 void 522 devctl_notify(const char *system, const char *subsystem, const char *type, 523 const char *data) 524 { 525 int len = 0; 526 char *msg; 527 528 if (system == NULL) 529 return; /* BOGUS! Must specify system. */ 530 if (subsystem == NULL) 531 return; /* BOGUS! Must specify subsystem. */ 532 if (type == NULL) 533 return; /* BOGUS! Must specify type. */ 534 len += strlen(" system=") + strlen(system); 535 len += strlen(" subsystem=") + strlen(subsystem); 536 len += strlen(" type=") + strlen(type); 537 /* add in the data message plus newline. */ 538 if (data != NULL) 539 len += strlen(data); 540 len += 3; /* '!', '\n', and NUL */ 541 msg = kmalloc(len, M_BUS, M_NOWAIT); 542 if (msg == NULL) 543 return; /* Drop it on the floor */ 544 if (data != NULL) 545 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n", 546 system, subsystem, type, data); 547 else 548 ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n", 549 system, subsystem, type); 550 devctl_queue_data(msg); 551 } 552 553 /* 554 * Common routine that tries to make sending messages as easy as possible. 555 * We allocate memory for the data, copy strings into that, but do not 556 * free it unless there's an error. The dequeue part of the driver should 557 * free the data. We don't send data when the device is disabled. We do 558 * send data, even when we have no listeners, because we wish to avoid 559 * races relating to startup and restart of listening applications. 560 * 561 * devaddq is designed to string together the type of event, with the 562 * object of that event, plus the plug and play info and location info 563 * for that event. This is likely most useful for devices, but less 564 * useful for other consumers of this interface. Those should use 565 * the devctl_queue_data() interface instead. 566 */ 567 static void 568 devaddq(const char *type, const char *what, device_t dev) 569 { 570 char *data = NULL; 571 char *loc = NULL; 572 char *pnp = NULL; 573 const char *parstr; 574 575 if (devctl_disable) 576 return; 577 data = kmalloc(1024, M_BUS, M_NOWAIT); 578 if (data == NULL) 579 goto bad; 580 581 /* get the bus specific location of this device */ 582 loc = kmalloc(1024, M_BUS, M_NOWAIT); 583 if (loc == NULL) 584 goto bad; 585 *loc = '\0'; 586 bus_child_location_str(dev, loc, 1024); 587 588 /* Get the bus specific pnp info of this device */ 589 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 590 if (pnp == NULL) 591 goto bad; 592 *pnp = '\0'; 593 bus_child_pnpinfo_str(dev, pnp, 1024); 594 595 /* Get the parent of this device, or / if high enough in the tree. */ 596 if (device_get_parent(dev) == NULL) 597 parstr = "."; /* Or '/' ? */ 598 else 599 parstr = device_get_nameunit(device_get_parent(dev)); 600 /* String it all together. */ 601 ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp, 602 parstr); 603 kfree(loc, M_BUS); 604 kfree(pnp, M_BUS); 605 devctl_queue_data(data); 606 return; 607 bad: 608 if (pnp != NULL) 609 kfree(pnp, M_BUS); 610 if (loc != NULL) 611 kfree(loc, M_BUS); 612 if (loc != NULL) 613 kfree(data, M_BUS); 614 return; 615 } 616 617 /* 618 * A device was added to the tree. We are called just after it successfully 619 * attaches (that is, probe and attach success for this device). No call 620 * is made if a device is merely parented into the tree. See devnomatch 621 * if probe fails. If attach fails, no notification is sent (but maybe 622 * we should have a different message for this). 623 */ 624 static void 625 devadded(device_t dev) 626 { 627 char *pnp = NULL; 628 char *tmp = NULL; 629 630 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 631 if (pnp == NULL) 632 goto fail; 633 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 634 if (tmp == NULL) 635 goto fail; 636 *pnp = '\0'; 637 bus_child_pnpinfo_str(dev, pnp, 1024); 638 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 639 devaddq("+", tmp, dev); 640 fail: 641 if (pnp != NULL) 642 kfree(pnp, M_BUS); 643 if (tmp != NULL) 644 kfree(tmp, M_BUS); 645 return; 646 } 647 648 /* 649 * A device was removed from the tree. We are called just before this 650 * happens. 651 */ 652 static void 653 devremoved(device_t dev) 654 { 655 char *pnp = NULL; 656 char *tmp = NULL; 657 658 pnp = kmalloc(1024, M_BUS, M_NOWAIT); 659 if (pnp == NULL) 660 goto fail; 661 tmp = kmalloc(1024, M_BUS, M_NOWAIT); 662 if (tmp == NULL) 663 goto fail; 664 *pnp = '\0'; 665 bus_child_pnpinfo_str(dev, pnp, 1024); 666 ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); 667 devaddq("-", tmp, dev); 668 fail: 669 if (pnp != NULL) 670 kfree(pnp, M_BUS); 671 if (tmp != NULL) 672 kfree(tmp, M_BUS); 673 return; 674 } 675 676 /* 677 * Called when there's no match for this device. This is only called 678 * the first time that no match happens, so we don't keep getitng this 679 * message. Should that prove to be undesirable, we can change it. 680 * This is called when all drivers that can attach to a given bus 681 * decline to accept this device. Other errrors may not be detected. 682 */ 683 static void 684 devnomatch(device_t dev) 685 { 686 devaddq("?", "", dev); 687 } 688 689 static int 690 sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) 691 { 692 struct dev_event_info *n1; 693 int dis, error; 694 695 dis = devctl_disable; 696 error = sysctl_handle_int(oidp, &dis, 0, req); 697 if (error || !req->newptr) 698 return (error); 699 lockmgr(&devsoftc.lock, LK_EXCLUSIVE); 700 devctl_disable = dis; 701 if (dis) { 702 while (!TAILQ_EMPTY(&devsoftc.devq)) { 703 n1 = TAILQ_FIRST(&devsoftc.devq); 704 TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); 705 kfree(n1->dei_data, M_BUS); 706 kfree(n1, M_BUS); 707 } 708 } 709 lockmgr(&devsoftc.lock, LK_RELEASE); 710 return (0); 711 } 712 713 /* End of /dev/devctl code */ 714 715 TAILQ_HEAD(,bsd_device) bus_data_devices; 716 static int bus_data_generation = 1; 717 718 kobj_method_t null_methods[] = { 719 { 0, 0 } 720 }; 721 722 DEFINE_CLASS(null, null_methods, 0); 723 724 /* 725 * Devclass implementation 726 */ 727 728 static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); 729 730 static devclass_t 731 devclass_find_internal(const char *classname, const char *parentname, 732 int create) 733 { 734 devclass_t dc; 735 736 PDEBUG(("looking for %s", classname)); 737 if (classname == NULL) 738 return(NULL); 739 740 TAILQ_FOREACH(dc, &devclasses, link) 741 if (!strcmp(dc->name, classname)) 742 break; 743 744 if (create && !dc) { 745 PDEBUG(("creating %s", classname)); 746 dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1, 747 M_BUS, M_INTWAIT | M_ZERO); 748 dc->parent = NULL; 749 dc->name = (char*) (dc + 1); 750 strcpy(dc->name, classname); 751 dc->devices = NULL; 752 dc->maxunit = 0; 753 TAILQ_INIT(&dc->drivers); 754 TAILQ_INSERT_TAIL(&devclasses, dc, link); 755 756 bus_data_generation_update(); 757 758 } 759 760 /* 761 * If a parent class is specified, then set that as our parent so 762 * that this devclass will support drivers for the parent class as 763 * well. If the parent class has the same name don't do this though 764 * as it creates a cycle that can trigger an infinite loop in 765 * device_probe_child() if a device exists for which there is no 766 * suitable driver. 767 */ 768 if (parentname && dc && !dc->parent && 769 strcmp(classname, parentname) != 0) 770 dc->parent = devclass_find_internal(parentname, NULL, FALSE); 771 772 return(dc); 773 } 774 775 devclass_t 776 devclass_create(const char *classname) 777 { 778 return(devclass_find_internal(classname, NULL, TRUE)); 779 } 780 781 devclass_t 782 devclass_find(const char *classname) 783 { 784 return(devclass_find_internal(classname, NULL, FALSE)); 785 } 786 787 device_t 788 devclass_find_unit(const char *classname, int unit) 789 { 790 devclass_t dc; 791 792 if ((dc = devclass_find(classname)) != NULL) 793 return(devclass_get_device(dc, unit)); 794 return (NULL); 795 } 796 797 int 798 devclass_add_driver(devclass_t dc, driver_t *driver) 799 { 800 driverlink_t dl; 801 device_t dev; 802 int i; 803 804 PDEBUG(("%s", DRIVERNAME(driver))); 805 806 dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); 807 808 /* 809 * Compile the driver's methods. Also increase the reference count 810 * so that the class doesn't get freed when the last instance 811 * goes. This means we can safely use static methods and avoids a 812 * double-free in devclass_delete_driver. 813 */ 814 kobj_class_instantiate(driver); 815 816 /* 817 * Make sure the devclass which the driver is implementing exists. 818 */ 819 devclass_find_internal(driver->name, NULL, TRUE); 820 821 dl->driver = driver; 822 TAILQ_INSERT_TAIL(&dc->drivers, dl, link); 823 824 /* 825 * Call BUS_DRIVER_ADDED for any existing busses in this class, 826 * but only if the bus has already been attached (otherwise we 827 * might probe too early). 828 * 829 * This is what will cause a newly loaded module to be associated 830 * with hardware. bus_generic_driver_added() is typically what ends 831 * up being called. 832 */ 833 for (i = 0; i < dc->maxunit; i++) { 834 if ((dev = dc->devices[i]) != NULL) { 835 if (dev->state >= DS_ATTACHED) 836 BUS_DRIVER_ADDED(dev, driver); 837 } 838 } 839 840 bus_data_generation_update(); 841 return(0); 842 } 843 844 int 845 devclass_delete_driver(devclass_t busclass, driver_t *driver) 846 { 847 devclass_t dc = devclass_find(driver->name); 848 driverlink_t dl; 849 device_t dev; 850 int i; 851 int error; 852 853 PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); 854 855 if (!dc) 856 return(0); 857 858 /* 859 * Find the link structure in the bus' list of drivers. 860 */ 861 TAILQ_FOREACH(dl, &busclass->drivers, link) 862 if (dl->driver == driver) 863 break; 864 865 if (!dl) { 866 PDEBUG(("%s not found in %s list", driver->name, busclass->name)); 867 return(ENOENT); 868 } 869 870 /* 871 * Disassociate from any devices. We iterate through all the 872 * devices in the devclass of the driver and detach any which are 873 * using the driver and which have a parent in the devclass which 874 * we are deleting from. 875 * 876 * Note that since a driver can be in multiple devclasses, we 877 * should not detach devices which are not children of devices in 878 * the affected devclass. 879 */ 880 for (i = 0; i < dc->maxunit; i++) 881 if (dc->devices[i]) { 882 dev = dc->devices[i]; 883 if (dev->driver == driver && dev->parent && 884 dev->parent->devclass == busclass) { 885 if ((error = device_detach(dev)) != 0) 886 return(error); 887 device_set_driver(dev, NULL); 888 } 889 } 890 891 TAILQ_REMOVE(&busclass->drivers, dl, link); 892 kfree(dl, M_BUS); 893 894 kobj_class_uninstantiate(driver); 895 896 bus_data_generation_update(); 897 return(0); 898 } 899 900 static driverlink_t 901 devclass_find_driver_internal(devclass_t dc, const char *classname) 902 { 903 driverlink_t dl; 904 905 PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); 906 907 TAILQ_FOREACH(dl, &dc->drivers, link) 908 if (!strcmp(dl->driver->name, classname)) 909 return(dl); 910 911 PDEBUG(("not found")); 912 return(NULL); 913 } 914 915 kobj_class_t 916 devclass_find_driver(devclass_t dc, const char *classname) 917 { 918 driverlink_t dl; 919 920 dl = devclass_find_driver_internal(dc, classname); 921 if (dl) 922 return(dl->driver); 923 else 924 return(NULL); 925 } 926 927 const char * 928 devclass_get_name(devclass_t dc) 929 { 930 return(dc->name); 931 } 932 933 device_t 934 devclass_get_device(devclass_t dc, int unit) 935 { 936 if (dc == NULL || unit < 0 || unit >= dc->maxunit) 937 return(NULL); 938 return(dc->devices[unit]); 939 } 940 941 void * 942 devclass_get_softc(devclass_t dc, int unit) 943 { 944 device_t dev; 945 946 dev = devclass_get_device(dc, unit); 947 if (!dev) 948 return(NULL); 949 950 return(device_get_softc(dev)); 951 } 952 953 int 954 devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) 955 { 956 int i; 957 int count; 958 device_t *list; 959 960 count = 0; 961 for (i = 0; i < dc->maxunit; i++) 962 if (dc->devices[i]) 963 count++; 964 965 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 966 967 count = 0; 968 for (i = 0; i < dc->maxunit; i++) 969 if (dc->devices[i]) { 970 list[count] = dc->devices[i]; 971 count++; 972 } 973 974 *devlistp = list; 975 *devcountp = count; 976 977 return(0); 978 } 979 980 /** 981 * @brief Get a list of drivers in the devclass 982 * 983 * An array containing a list of pointers to all the drivers in the 984 * given devclass is allocated and returned in @p *listp. The number 985 * of drivers in the array is returned in @p *countp. The caller should 986 * free the array using @c free(p, M_TEMP). 987 * 988 * @param dc the devclass to examine 989 * @param listp gives location for array pointer return value 990 * @param countp gives location for number of array elements 991 * return value 992 * 993 * @retval 0 success 994 * @retval ENOMEM the array allocation failed 995 */ 996 int 997 devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp) 998 { 999 driverlink_t dl; 1000 driver_t **list; 1001 int count; 1002 1003 count = 0; 1004 TAILQ_FOREACH(dl, &dc->drivers, link) 1005 count++; 1006 list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT); 1007 if (list == NULL) 1008 return (ENOMEM); 1009 1010 count = 0; 1011 TAILQ_FOREACH(dl, &dc->drivers, link) { 1012 list[count] = dl->driver; 1013 count++; 1014 } 1015 *listp = list; 1016 *countp = count; 1017 1018 return (0); 1019 } 1020 1021 /** 1022 * @brief Get the number of devices in a devclass 1023 * 1024 * @param dc the devclass to examine 1025 */ 1026 int 1027 devclass_get_count(devclass_t dc) 1028 { 1029 int count, i; 1030 1031 count = 0; 1032 for (i = 0; i < dc->maxunit; i++) 1033 if (dc->devices[i]) 1034 count++; 1035 return (count); 1036 } 1037 1038 int 1039 devclass_get_maxunit(devclass_t dc) 1040 { 1041 return(dc->maxunit); 1042 } 1043 1044 void 1045 devclass_set_parent(devclass_t dc, devclass_t pdc) 1046 { 1047 dc->parent = pdc; 1048 } 1049 1050 devclass_t 1051 devclass_get_parent(devclass_t dc) 1052 { 1053 return(dc->parent); 1054 } 1055 1056 static int 1057 devclass_alloc_unit(devclass_t dc, int *unitp) 1058 { 1059 int unit = *unitp; 1060 1061 PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); 1062 1063 /* If we have been given a wired unit number, check for existing device */ 1064 if (unit != -1) { 1065 if (unit >= 0 && unit < dc->maxunit && 1066 dc->devices[unit] != NULL) { 1067 if (bootverbose) 1068 kprintf("%s-: %s%d exists, using next available unit number\n", 1069 dc->name, dc->name, unit); 1070 /* find the next available slot */ 1071 while (++unit < dc->maxunit && dc->devices[unit] != NULL) 1072 ; 1073 } 1074 } else { 1075 /* Unwired device, find the next available slot for it */ 1076 unit = 0; 1077 while (unit < dc->maxunit && dc->devices[unit] != NULL) 1078 unit++; 1079 } 1080 1081 /* 1082 * We've selected a unit beyond the length of the table, so let's 1083 * extend the table to make room for all units up to and including 1084 * this one. 1085 */ 1086 if (unit >= dc->maxunit) { 1087 device_t *newlist; 1088 int newsize; 1089 1090 newsize = (unit + 1); 1091 newlist = kmalloc(sizeof(device_t) * newsize, M_BUS, 1092 M_INTWAIT | M_ZERO); 1093 if (newlist == NULL) 1094 return(ENOMEM); 1095 /* 1096 * WARNING: Due to gcc builtin optimization, 1097 * calling bcopy causes gcc to assume 1098 * that the source and destination args 1099 * cannot be NULL and optimize-away later 1100 * conditional tests to determine if dc->devices 1101 * is NULL. In this situation, in fact, 1102 * dc->devices CAN be NULL w/ maxunit == 0. 1103 */ 1104 if (dc->devices) { 1105 bcopy(dc->devices, 1106 newlist, 1107 sizeof(device_t) * dc->maxunit); 1108 kfree(dc->devices, M_BUS); 1109 } 1110 dc->devices = newlist; 1111 dc->maxunit = newsize; 1112 } 1113 PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); 1114 1115 *unitp = unit; 1116 return(0); 1117 } 1118 1119 static int 1120 devclass_add_device(devclass_t dc, device_t dev) 1121 { 1122 int buflen, error; 1123 1124 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 1125 1126 buflen = strlen(dc->name) + 5; 1127 dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO); 1128 if (dev->nameunit == NULL) 1129 return(ENOMEM); 1130 1131 if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { 1132 kfree(dev->nameunit, M_BUS); 1133 dev->nameunit = NULL; 1134 return(error); 1135 } 1136 dc->devices[dev->unit] = dev; 1137 dev->devclass = dc; 1138 ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); 1139 1140 return(0); 1141 } 1142 1143 static int 1144 devclass_delete_device(devclass_t dc, device_t dev) 1145 { 1146 if (!dc || !dev) 1147 return(0); 1148 1149 PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); 1150 1151 if (dev->devclass != dc || dc->devices[dev->unit] != dev) 1152 panic("devclass_delete_device: inconsistent device class"); 1153 dc->devices[dev->unit] = NULL; 1154 if (dev->flags & DF_WILDCARD) 1155 dev->unit = -1; 1156 dev->devclass = NULL; 1157 kfree(dev->nameunit, M_BUS); 1158 dev->nameunit = NULL; 1159 1160 return(0); 1161 } 1162 1163 static device_t 1164 make_device(device_t parent, const char *name, int unit) 1165 { 1166 device_t dev; 1167 devclass_t dc; 1168 1169 PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); 1170 1171 if (name != NULL) { 1172 dc = devclass_find_internal(name, NULL, TRUE); 1173 if (!dc) { 1174 kprintf("make_device: can't find device class %s\n", name); 1175 return(NULL); 1176 } 1177 } else 1178 dc = NULL; 1179 1180 dev = kmalloc(sizeof(struct bsd_device), M_BUS, M_INTWAIT | M_ZERO); 1181 if (!dev) 1182 return(0); 1183 1184 dev->parent = parent; 1185 TAILQ_INIT(&dev->children); 1186 kobj_init((kobj_t) dev, &null_class); 1187 dev->driver = NULL; 1188 dev->devclass = NULL; 1189 dev->unit = unit; 1190 dev->nameunit = NULL; 1191 dev->desc = NULL; 1192 dev->busy = 0; 1193 dev->devflags = 0; 1194 dev->flags = DF_ENABLED; 1195 dev->order = 0; 1196 if (unit == -1) 1197 dev->flags |= DF_WILDCARD; 1198 if (name) { 1199 dev->flags |= DF_FIXEDCLASS; 1200 if (devclass_add_device(dc, dev) != 0) { 1201 kobj_delete((kobj_t)dev, M_BUS); 1202 return(NULL); 1203 } 1204 } 1205 dev->ivars = NULL; 1206 dev->softc = NULL; 1207 1208 dev->state = DS_NOTPRESENT; 1209 1210 TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); 1211 bus_data_generation_update(); 1212 1213 return(dev); 1214 } 1215 1216 static int 1217 device_print_child(device_t dev, device_t child) 1218 { 1219 int retval = 0; 1220 1221 if (device_is_alive(child)) 1222 retval += BUS_PRINT_CHILD(dev, child); 1223 else 1224 retval += device_printf(child, " not found\n"); 1225 1226 return(retval); 1227 } 1228 1229 device_t 1230 device_add_child(device_t dev, const char *name, int unit) 1231 { 1232 return device_add_child_ordered(dev, 0, name, unit); 1233 } 1234 1235 device_t 1236 device_add_child_ordered(device_t dev, int order, const char *name, int unit) 1237 { 1238 device_t child; 1239 device_t place; 1240 1241 PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), 1242 order, unit)); 1243 1244 child = make_device(dev, name, unit); 1245 if (child == NULL) 1246 return child; 1247 child->order = order; 1248 1249 TAILQ_FOREACH(place, &dev->children, link) { 1250 if (place->order > order) 1251 break; 1252 } 1253 1254 if (place) { 1255 /* 1256 * The device 'place' is the first device whose order is 1257 * greater than the new child. 1258 */ 1259 TAILQ_INSERT_BEFORE(place, child, link); 1260 } else { 1261 /* 1262 * The new child's order is greater or equal to the order of 1263 * any existing device. Add the child to the tail of the list. 1264 */ 1265 TAILQ_INSERT_TAIL(&dev->children, child, link); 1266 } 1267 1268 bus_data_generation_update(); 1269 return(child); 1270 } 1271 1272 int 1273 device_delete_child(device_t dev, device_t child) 1274 { 1275 int error; 1276 device_t grandchild; 1277 1278 PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); 1279 1280 /* remove children first */ 1281 while ( (grandchild = TAILQ_FIRST(&child->children)) ) { 1282 error = device_delete_child(child, grandchild); 1283 if (error) 1284 return(error); 1285 } 1286 1287 if ((error = device_detach(child)) != 0) 1288 return(error); 1289 if (child->devclass) 1290 devclass_delete_device(child->devclass, child); 1291 TAILQ_REMOVE(&dev->children, child, link); 1292 TAILQ_REMOVE(&bus_data_devices, child, devlink); 1293 kobj_delete((kobj_t)child, M_BUS); 1294 1295 bus_data_generation_update(); 1296 return(0); 1297 } 1298 1299 /** 1300 * @brief Delete all children devices of the given device, if any. 1301 * 1302 * This function deletes all children devices of the given device, if 1303 * any, using the device_delete_child() function for each device it 1304 * finds. If a child device cannot be deleted, this function will 1305 * return an error code. 1306 * 1307 * @param dev the parent device 1308 * 1309 * @retval 0 success 1310 * @retval non-zero a device would not detach 1311 */ 1312 int 1313 device_delete_children(device_t dev) 1314 { 1315 device_t child; 1316 int error; 1317 1318 PDEBUG(("Deleting all children of %s", DEVICENAME(dev))); 1319 1320 error = 0; 1321 1322 while ((child = TAILQ_FIRST(&dev->children)) != NULL) { 1323 error = device_delete_child(dev, child); 1324 if (error) { 1325 PDEBUG(("Failed deleting %s", DEVICENAME(child))); 1326 break; 1327 } 1328 } 1329 return (error); 1330 } 1331 1332 /** 1333 * @brief Find a device given a unit number 1334 * 1335 * This is similar to devclass_get_devices() but only searches for 1336 * devices which have @p dev as a parent. 1337 * 1338 * @param dev the parent device to search 1339 * @param unit the unit number to search for. If the unit is -1, 1340 * return the first child of @p dev which has name 1341 * @p classname (that is, the one with the lowest unit.) 1342 * 1343 * @returns the device with the given unit number or @c 1344 * NULL if there is no such device 1345 */ 1346 device_t 1347 device_find_child(device_t dev, const char *classname, int unit) 1348 { 1349 devclass_t dc; 1350 device_t child; 1351 1352 dc = devclass_find(classname); 1353 if (!dc) 1354 return(NULL); 1355 1356 if (unit != -1) { 1357 child = devclass_get_device(dc, unit); 1358 if (child && child->parent == dev) 1359 return (child); 1360 } else { 1361 for (unit = 0; unit < devclass_get_maxunit(dc); unit++) { 1362 child = devclass_get_device(dc, unit); 1363 if (child && child->parent == dev) 1364 return (child); 1365 } 1366 } 1367 return(NULL); 1368 } 1369 1370 static driverlink_t 1371 first_matching_driver(devclass_t dc, device_t dev) 1372 { 1373 if (dev->devclass) 1374 return(devclass_find_driver_internal(dc, dev->devclass->name)); 1375 else 1376 return(TAILQ_FIRST(&dc->drivers)); 1377 } 1378 1379 static driverlink_t 1380 next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) 1381 { 1382 if (dev->devclass) { 1383 driverlink_t dl; 1384 for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) 1385 if (!strcmp(dev->devclass->name, dl->driver->name)) 1386 return(dl); 1387 return(NULL); 1388 } else 1389 return(TAILQ_NEXT(last, link)); 1390 } 1391 1392 int 1393 device_probe_child(device_t dev, device_t child) 1394 { 1395 devclass_t dc; 1396 driverlink_t best = NULL; 1397 driverlink_t dl; 1398 int result, pri = 0; 1399 int hasclass = (child->devclass != NULL); 1400 1401 dc = dev->devclass; 1402 if (!dc) 1403 panic("device_probe_child: parent device has no devclass"); 1404 1405 if (child->state == DS_ALIVE) 1406 return(0); 1407 1408 for (; dc; dc = dc->parent) { 1409 for (dl = first_matching_driver(dc, child); dl; 1410 dl = next_matching_driver(dc, child, dl)) { 1411 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1412 device_set_driver(child, dl->driver); 1413 if (!hasclass) 1414 device_set_devclass(child, dl->driver->name); 1415 result = DEVICE_PROBE(child); 1416 if (!hasclass) 1417 device_set_devclass(child, 0); 1418 1419 /* 1420 * If the driver returns SUCCESS, there can be 1421 * no higher match for this device. 1422 */ 1423 if (result == 0) { 1424 best = dl; 1425 pri = 0; 1426 break; 1427 } 1428 1429 /* 1430 * The driver returned an error so it 1431 * certainly doesn't match. 1432 */ 1433 if (result > 0) { 1434 device_set_driver(child, NULL); 1435 continue; 1436 } 1437 1438 /* 1439 * A priority lower than SUCCESS, remember the 1440 * best matching driver. Initialise the value 1441 * of pri for the first match. 1442 */ 1443 if (best == NULL || result > pri) { 1444 best = dl; 1445 pri = result; 1446 continue; 1447 } 1448 } 1449 /* 1450 * If we have unambiguous match in this devclass, 1451 * don't look in the parent. 1452 */ 1453 if (best && pri == 0) 1454 break; 1455 } 1456 1457 /* 1458 * If we found a driver, change state and initialise the devclass. 1459 */ 1460 if (best) { 1461 if (!child->devclass) 1462 device_set_devclass(child, best->driver->name); 1463 device_set_driver(child, best->driver); 1464 if (pri < 0) { 1465 /* 1466 * A bit bogus. Call the probe method again to make 1467 * sure that we have the right description. 1468 */ 1469 DEVICE_PROBE(child); 1470 } 1471 1472 bus_data_generation_update(); 1473 child->state = DS_ALIVE; 1474 return(0); 1475 } 1476 1477 return(ENXIO); 1478 } 1479 1480 int 1481 device_probe_child_gpri(device_t dev, device_t child, u_int gpri) 1482 { 1483 devclass_t dc; 1484 driverlink_t best = NULL; 1485 driverlink_t dl; 1486 int result, pri = 0; 1487 int hasclass = (child->devclass != NULL); 1488 1489 dc = dev->devclass; 1490 if (!dc) 1491 panic("device_probe_child: parent device has no devclass"); 1492 1493 if (child->state == DS_ALIVE) 1494 return(0); 1495 1496 for (; dc; dc = dc->parent) { 1497 for (dl = first_matching_driver(dc, child); dl; 1498 dl = next_matching_driver(dc, child, dl)) { 1499 /* 1500 * GPRI handling, only probe drivers with the 1501 * specific GPRI. 1502 */ 1503 if (dl->driver->gpri != gpri) 1504 continue; 1505 1506 PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); 1507 device_set_driver(child, dl->driver); 1508 if (!hasclass) 1509 device_set_devclass(child, dl->driver->name); 1510 result = DEVICE_PROBE(child); 1511 if (!hasclass) 1512 device_set_devclass(child, 0); 1513 1514 /* 1515 * If the driver returns SUCCESS, there can be 1516 * no higher match for this device. 1517 */ 1518 if (result == 0) { 1519 best = dl; 1520 pri = 0; 1521 break; 1522 } 1523 1524 /* 1525 * The driver returned an error so it 1526 * certainly doesn't match. 1527 */ 1528 if (result > 0) { 1529 device_set_driver(child, NULL); 1530 continue; 1531 } 1532 1533 /* 1534 * A priority lower than SUCCESS, remember the 1535 * best matching driver. Initialise the value 1536 * of pri for the first match. 1537 */ 1538 if (best == NULL || result > pri) { 1539 best = dl; 1540 pri = result; 1541 continue; 1542 } 1543 } 1544 /* 1545 * If we have unambiguous match in this devclass, 1546 * don't look in the parent. 1547 */ 1548 if (best && pri == 0) 1549 break; 1550 } 1551 1552 /* 1553 * If we found a driver, change state and initialise the devclass. 1554 */ 1555 if (best) { 1556 if (!child->devclass) 1557 device_set_devclass(child, best->driver->name); 1558 device_set_driver(child, best->driver); 1559 if (pri < 0) { 1560 /* 1561 * A bit bogus. Call the probe method again to make 1562 * sure that we have the right description. 1563 */ 1564 DEVICE_PROBE(child); 1565 } 1566 1567 bus_data_generation_update(); 1568 child->state = DS_ALIVE; 1569 return(0); 1570 } 1571 1572 return(ENXIO); 1573 } 1574 1575 device_t 1576 device_get_parent(device_t dev) 1577 { 1578 return dev->parent; 1579 } 1580 1581 int 1582 device_get_children(device_t dev, device_t **devlistp, int *devcountp) 1583 { 1584 int count; 1585 device_t child; 1586 device_t *list; 1587 1588 count = 0; 1589 TAILQ_FOREACH(child, &dev->children, link) 1590 count++; 1591 1592 list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); 1593 1594 count = 0; 1595 TAILQ_FOREACH(child, &dev->children, link) { 1596 list[count] = child; 1597 count++; 1598 } 1599 1600 *devlistp = list; 1601 *devcountp = count; 1602 1603 return(0); 1604 } 1605 1606 driver_t * 1607 device_get_driver(device_t dev) 1608 { 1609 return(dev->driver); 1610 } 1611 1612 devclass_t 1613 device_get_devclass(device_t dev) 1614 { 1615 return(dev->devclass); 1616 } 1617 1618 const char * 1619 device_get_name(device_t dev) 1620 { 1621 if (dev->devclass) 1622 return devclass_get_name(dev->devclass); 1623 return(NULL); 1624 } 1625 1626 const char * 1627 device_get_nameunit(device_t dev) 1628 { 1629 return(dev->nameunit); 1630 } 1631 1632 int 1633 device_get_unit(device_t dev) 1634 { 1635 return(dev->unit); 1636 } 1637 1638 const char * 1639 device_get_desc(device_t dev) 1640 { 1641 return(dev->desc); 1642 } 1643 1644 uint32_t 1645 device_get_flags(device_t dev) 1646 { 1647 return(dev->devflags); 1648 } 1649 1650 struct sysctl_ctx_list * 1651 device_get_sysctl_ctx(device_t dev) 1652 { 1653 return (&dev->sysctl_ctx); 1654 } 1655 1656 struct sysctl_oid * 1657 device_get_sysctl_tree(device_t dev) 1658 { 1659 return (dev->sysctl_tree); 1660 } 1661 1662 int 1663 device_print_prettyname(device_t dev) 1664 { 1665 const char *name = device_get_name(dev); 1666 1667 if (name == NULL) 1668 return kprintf("unknown: "); 1669 else 1670 return kprintf("%s%d: ", name, device_get_unit(dev)); 1671 } 1672 1673 int 1674 device_printf(device_t dev, const char * fmt, ...) 1675 { 1676 __va_list ap; 1677 int retval; 1678 1679 retval = device_print_prettyname(dev); 1680 __va_start(ap, fmt); 1681 retval += kvprintf(fmt, ap); 1682 __va_end(ap); 1683 return retval; 1684 } 1685 1686 static void 1687 device_set_desc_internal(device_t dev, const char* desc, int copy) 1688 { 1689 if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { 1690 kfree(dev->desc, M_BUS); 1691 dev->flags &= ~DF_DESCMALLOCED; 1692 dev->desc = NULL; 1693 } 1694 1695 if (copy && desc) { 1696 dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT); 1697 if (dev->desc) { 1698 strcpy(dev->desc, desc); 1699 dev->flags |= DF_DESCMALLOCED; 1700 } 1701 } else { 1702 /* Avoid a -Wcast-qual warning */ 1703 dev->desc = (char *)(uintptr_t) desc; 1704 } 1705 1706 bus_data_generation_update(); 1707 } 1708 1709 void 1710 device_set_desc(device_t dev, const char* desc) 1711 { 1712 device_set_desc_internal(dev, desc, FALSE); 1713 } 1714 1715 void 1716 device_set_desc_copy(device_t dev, const char* desc) 1717 { 1718 device_set_desc_internal(dev, desc, TRUE); 1719 } 1720 1721 void 1722 device_set_flags(device_t dev, uint32_t flags) 1723 { 1724 dev->devflags = flags; 1725 } 1726 1727 void * 1728 device_get_softc(device_t dev) 1729 { 1730 return dev->softc; 1731 } 1732 1733 void 1734 device_set_softc(device_t dev, void *softc) 1735 { 1736 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) 1737 kfree(dev->softc, M_BUS); 1738 dev->softc = softc; 1739 if (dev->softc) 1740 dev->flags |= DF_EXTERNALSOFTC; 1741 else 1742 dev->flags &= ~DF_EXTERNALSOFTC; 1743 } 1744 1745 void 1746 device_set_async_attach(device_t dev, int enable) 1747 { 1748 if (enable) 1749 dev->flags |= DF_ASYNCPROBE; 1750 else 1751 dev->flags &= ~DF_ASYNCPROBE; 1752 } 1753 1754 void * 1755 device_get_ivars(device_t dev) 1756 { 1757 return dev->ivars; 1758 } 1759 1760 void 1761 device_set_ivars(device_t dev, void * ivars) 1762 { 1763 if (!dev) 1764 return; 1765 1766 dev->ivars = ivars; 1767 } 1768 1769 device_state_t 1770 device_get_state(device_t dev) 1771 { 1772 return(dev->state); 1773 } 1774 1775 void 1776 device_enable(device_t dev) 1777 { 1778 dev->flags |= DF_ENABLED; 1779 } 1780 1781 void 1782 device_disable(device_t dev) 1783 { 1784 dev->flags &= ~DF_ENABLED; 1785 } 1786 1787 /* 1788 * YYY cannot block 1789 */ 1790 void 1791 device_busy(device_t dev) 1792 { 1793 if (dev->state < DS_ATTACHED) 1794 panic("device_busy: called for unattached device"); 1795 if (dev->busy == 0 && dev->parent) 1796 device_busy(dev->parent); 1797 dev->busy++; 1798 dev->state = DS_BUSY; 1799 } 1800 1801 /* 1802 * YYY cannot block 1803 */ 1804 void 1805 device_unbusy(device_t dev) 1806 { 1807 if (dev->state != DS_BUSY) 1808 panic("device_unbusy: called for non-busy device"); 1809 dev->busy--; 1810 if (dev->busy == 0) { 1811 if (dev->parent) 1812 device_unbusy(dev->parent); 1813 dev->state = DS_ATTACHED; 1814 } 1815 } 1816 1817 void 1818 device_quiet(device_t dev) 1819 { 1820 dev->flags |= DF_QUIET; 1821 } 1822 1823 void 1824 device_verbose(device_t dev) 1825 { 1826 dev->flags &= ~DF_QUIET; 1827 } 1828 1829 int 1830 device_is_quiet(device_t dev) 1831 { 1832 return((dev->flags & DF_QUIET) != 0); 1833 } 1834 1835 int 1836 device_is_enabled(device_t dev) 1837 { 1838 return((dev->flags & DF_ENABLED) != 0); 1839 } 1840 1841 int 1842 device_is_alive(device_t dev) 1843 { 1844 return(dev->state >= DS_ALIVE); 1845 } 1846 1847 int 1848 device_is_attached(device_t dev) 1849 { 1850 return(dev->state >= DS_ATTACHED); 1851 } 1852 1853 int 1854 device_set_devclass(device_t dev, const char *classname) 1855 { 1856 devclass_t dc; 1857 int error; 1858 1859 if (!classname) { 1860 if (dev->devclass) 1861 devclass_delete_device(dev->devclass, dev); 1862 return(0); 1863 } 1864 1865 if (dev->devclass) { 1866 kprintf("device_set_devclass: device class already set\n"); 1867 return(EINVAL); 1868 } 1869 1870 dc = devclass_find_internal(classname, NULL, TRUE); 1871 if (!dc) 1872 return(ENOMEM); 1873 1874 error = devclass_add_device(dc, dev); 1875 1876 bus_data_generation_update(); 1877 return(error); 1878 } 1879 1880 int 1881 device_set_driver(device_t dev, driver_t *driver) 1882 { 1883 if (dev->state >= DS_ATTACHED) 1884 return(EBUSY); 1885 1886 if (dev->driver == driver) 1887 return(0); 1888 1889 if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { 1890 kfree(dev->softc, M_BUS); 1891 dev->softc = NULL; 1892 } 1893 device_set_desc(dev, NULL); 1894 kobj_delete((kobj_t) dev, 0); 1895 dev->driver = driver; 1896 if (driver) { 1897 kobj_init((kobj_t) dev, (kobj_class_t) driver); 1898 if (!(dev->flags & DF_EXTERNALSOFTC)) 1899 dev->softc = kmalloc(driver->size, M_BUS, 1900 M_INTWAIT | M_ZERO); 1901 } else { 1902 kobj_init((kobj_t) dev, &null_class); 1903 } 1904 1905 bus_data_generation_update(); 1906 return(0); 1907 } 1908 1909 int 1910 device_probe_and_attach(device_t dev) 1911 { 1912 device_t bus = dev->parent; 1913 int error = 0; 1914 1915 if (dev->state >= DS_ALIVE) 1916 return(0); 1917 1918 if ((dev->flags & DF_ENABLED) == 0) { 1919 if (bootverbose) { 1920 device_print_prettyname(dev); 1921 kprintf("not probed (disabled)\n"); 1922 } 1923 return(0); 1924 } 1925 1926 error = device_probe_child(bus, dev); 1927 if (error) { 1928 if (!(dev->flags & DF_DONENOMATCH)) { 1929 BUS_PROBE_NOMATCH(bus, dev); 1930 devnomatch(dev); 1931 dev->flags |= DF_DONENOMATCH; 1932 } 1933 return(error); 1934 } 1935 1936 /* 1937 * Output the exact device chain prior to the attach in case the 1938 * system locks up during attach, and generate the full info after 1939 * the attach so correct irq and other information is displayed. 1940 */ 1941 if (bootverbose && !device_is_quiet(dev)) { 1942 device_t tmp; 1943 1944 kprintf("%s", device_get_nameunit(dev)); 1945 for (tmp = dev->parent; tmp; tmp = tmp->parent) 1946 kprintf(".%s", device_get_nameunit(tmp)); 1947 kprintf("\n"); 1948 } 1949 if (!device_is_quiet(dev)) 1950 device_print_child(bus, dev); 1951 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) { 1952 kprintf("%s: probing asynchronously\n", 1953 device_get_nameunit(dev)); 1954 dev->state = DS_INPROGRESS; 1955 device_attach_async(dev); 1956 error = 0; 1957 } else { 1958 error = device_doattach(dev); 1959 } 1960 return(error); 1961 } 1962 1963 int 1964 device_probe_and_attach_gpri(device_t dev, u_int gpri) 1965 { 1966 device_t bus = dev->parent; 1967 int error = 0; 1968 1969 if (dev->state >= DS_ALIVE) 1970 return(0); 1971 1972 if ((dev->flags & DF_ENABLED) == 0) { 1973 if (bootverbose) { 1974 device_print_prettyname(dev); 1975 kprintf("not probed (disabled)\n"); 1976 } 1977 return(0); 1978 } 1979 1980 error = device_probe_child_gpri(bus, dev, gpri); 1981 if (error) { 1982 #if 0 1983 if (!(dev->flags & DF_DONENOMATCH)) { 1984 BUS_PROBE_NOMATCH(bus, dev); 1985 devnomatch(dev); 1986 dev->flags |= DF_DONENOMATCH; 1987 } 1988 #endif 1989 return(error); 1990 } 1991 1992 /* 1993 * Output the exact device chain prior to the attach in case the 1994 * system locks up during attach, and generate the full info after 1995 * the attach so correct irq and other information is displayed. 1996 */ 1997 if (bootverbose && !device_is_quiet(dev)) { 1998 device_t tmp; 1999 2000 kprintf("%s", device_get_nameunit(dev)); 2001 for (tmp = dev->parent; tmp; tmp = tmp->parent) 2002 kprintf(".%s", device_get_nameunit(tmp)); 2003 kprintf("\n"); 2004 } 2005 if (!device_is_quiet(dev)) 2006 device_print_child(bus, dev); 2007 if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) { 2008 kprintf("%s: probing asynchronously\n", 2009 device_get_nameunit(dev)); 2010 dev->state = DS_INPROGRESS; 2011 device_attach_async(dev); 2012 error = 0; 2013 } else { 2014 error = device_doattach(dev); 2015 } 2016 return(error); 2017 } 2018 2019 /* 2020 * Device is known to be alive, do the attach asynchronously. 2021 * However, serialize the attaches with the mp lock. 2022 */ 2023 static void 2024 device_attach_async(device_t dev) 2025 { 2026 thread_t td; 2027 2028 atomic_add_int(&numasyncthreads, 1); 2029 lwkt_create(device_attach_thread, dev, &td, NULL, 2030 0, 0, "%s", (dev->desc ? dev->desc : "devattach")); 2031 } 2032 2033 static void 2034 device_attach_thread(void *arg) 2035 { 2036 device_t dev = arg; 2037 2038 (void)device_doattach(dev); 2039 atomic_subtract_int(&numasyncthreads, 1); 2040 wakeup(&numasyncthreads); 2041 } 2042 2043 /* 2044 * Device is known to be alive, do the attach (synchronous or asynchronous) 2045 */ 2046 static int 2047 device_doattach(device_t dev) 2048 { 2049 device_t bus = dev->parent; 2050 int hasclass = (dev->devclass != NULL); 2051 int error; 2052 2053 device_sysctl_init(dev); 2054 error = DEVICE_ATTACH(dev); 2055 if (error == 0) { 2056 dev->state = DS_ATTACHED; 2057 if (bootverbose && !device_is_quiet(dev)) 2058 device_print_child(bus, dev); 2059 device_sysctl_update(dev); 2060 devadded(dev); 2061 } else { 2062 kprintf("device_probe_and_attach: %s%d attach returned %d\n", 2063 dev->driver->name, dev->unit, error); 2064 /* Unset the class that was set in device_probe_child */ 2065 if (!hasclass) 2066 device_set_devclass(dev, 0); 2067 device_set_driver(dev, NULL); 2068 dev->state = DS_NOTPRESENT; 2069 device_sysctl_fini(dev); 2070 } 2071 return(error); 2072 } 2073 2074 int 2075 device_detach(device_t dev) 2076 { 2077 int error; 2078 2079 PDEBUG(("%s", DEVICENAME(dev))); 2080 if (dev->state == DS_BUSY) 2081 return(EBUSY); 2082 if (dev->state != DS_ATTACHED) 2083 return(0); 2084 2085 if ((error = DEVICE_DETACH(dev)) != 0) 2086 return(error); 2087 devremoved(dev); 2088 device_printf(dev, "detached\n"); 2089 if (dev->parent) 2090 BUS_CHILD_DETACHED(dev->parent, dev); 2091 2092 if (!(dev->flags & DF_FIXEDCLASS)) 2093 devclass_delete_device(dev->devclass, dev); 2094 2095 dev->state = DS_NOTPRESENT; 2096 device_set_driver(dev, NULL); 2097 device_sysctl_fini(dev); 2098 2099 return(0); 2100 } 2101 2102 int 2103 device_shutdown(device_t dev) 2104 { 2105 if (dev->state < DS_ATTACHED) 2106 return 0; 2107 PDEBUG(("%s", DEVICENAME(dev))); 2108 return DEVICE_SHUTDOWN(dev); 2109 } 2110 2111 int 2112 device_set_unit(device_t dev, int unit) 2113 { 2114 devclass_t dc; 2115 int err; 2116 2117 dc = device_get_devclass(dev); 2118 if (unit < dc->maxunit && dc->devices[unit]) 2119 return(EBUSY); 2120 err = devclass_delete_device(dc, dev); 2121 if (err) 2122 return(err); 2123 dev->unit = unit; 2124 err = devclass_add_device(dc, dev); 2125 if (err) 2126 return(err); 2127 2128 bus_data_generation_update(); 2129 return(0); 2130 } 2131 2132 /*======================================*/ 2133 /* 2134 * Access functions for device resources. 2135 */ 2136 2137 /* Supplied by config(8) in ioconf.c */ 2138 extern struct config_device config_devtab[]; 2139 extern int devtab_count; 2140 2141 /* Runtime version */ 2142 struct config_device *devtab = config_devtab; 2143 2144 static int 2145 resource_new_name(const char *name, int unit) 2146 { 2147 struct config_device *new; 2148 2149 new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP, 2150 M_INTWAIT | M_ZERO); 2151 if (devtab && devtab_count > 0) 2152 bcopy(devtab, new, devtab_count * sizeof(*new)); 2153 new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT); 2154 if (new[devtab_count].name == NULL) { 2155 kfree(new, M_TEMP); 2156 return(-1); 2157 } 2158 strcpy(new[devtab_count].name, name); 2159 new[devtab_count].unit = unit; 2160 new[devtab_count].resource_count = 0; 2161 new[devtab_count].resources = NULL; 2162 if (devtab && devtab != config_devtab) 2163 kfree(devtab, M_TEMP); 2164 devtab = new; 2165 return devtab_count++; 2166 } 2167 2168 static int 2169 resource_new_resname(int j, const char *resname, resource_type type) 2170 { 2171 struct config_resource *new; 2172 int i; 2173 2174 i = devtab[j].resource_count; 2175 new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); 2176 if (devtab[j].resources && i > 0) 2177 bcopy(devtab[j].resources, new, i * sizeof(*new)); 2178 new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); 2179 if (new[i].name == NULL) { 2180 kfree(new, M_TEMP); 2181 return(-1); 2182 } 2183 strcpy(new[i].name, resname); 2184 new[i].type = type; 2185 if (devtab[j].resources) 2186 kfree(devtab[j].resources, M_TEMP); 2187 devtab[j].resources = new; 2188 devtab[j].resource_count = i + 1; 2189 return(i); 2190 } 2191 2192 static int 2193 resource_match_string(int i, const char *resname, const char *value) 2194 { 2195 int j; 2196 struct config_resource *res; 2197 2198 for (j = 0, res = devtab[i].resources; 2199 j < devtab[i].resource_count; j++, res++) 2200 if (!strcmp(res->name, resname) 2201 && res->type == RES_STRING 2202 && !strcmp(res->u.stringval, value)) 2203 return(j); 2204 return(-1); 2205 } 2206 2207 static int 2208 resource_find(const char *name, int unit, const char *resname, 2209 struct config_resource **result) 2210 { 2211 int i, j; 2212 struct config_resource *res; 2213 2214 /* 2215 * First check specific instances, then generic. 2216 */ 2217 for (i = 0; i < devtab_count; i++) { 2218 if (devtab[i].unit < 0) 2219 continue; 2220 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 2221 res = devtab[i].resources; 2222 for (j = 0; j < devtab[i].resource_count; j++, res++) 2223 if (!strcmp(res->name, resname)) { 2224 *result = res; 2225 return(0); 2226 } 2227 } 2228 } 2229 for (i = 0; i < devtab_count; i++) { 2230 if (devtab[i].unit >= 0) 2231 continue; 2232 /* XXX should this `&& devtab[i].unit == unit' be here? */ 2233 /* XXX if so, then the generic match does nothing */ 2234 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 2235 res = devtab[i].resources; 2236 for (j = 0; j < devtab[i].resource_count; j++, res++) 2237 if (!strcmp(res->name, resname)) { 2238 *result = res; 2239 return(0); 2240 } 2241 } 2242 } 2243 return(ENOENT); 2244 } 2245 2246 static int 2247 resource_kenv(const char *name, int unit, const char *resname, long *result) 2248 { 2249 const char *env; 2250 char buf[64]; 2251 2252 /* 2253 * DragonFly style loader.conf hinting 2254 */ 2255 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname); 2256 if ((env = kgetenv(buf)) != NULL) { 2257 *result = strtol(env, NULL, 0); 2258 return(0); 2259 } 2260 2261 /* 2262 * Also support FreeBSD style loader.conf hinting 2263 */ 2264 ksnprintf(buf, sizeof(buf), "hint.%s.%d.%s", name, unit, resname); 2265 if ((env = kgetenv(buf)) != NULL) { 2266 *result = strtol(env, NULL, 0); 2267 return(0); 2268 } 2269 2270 return (ENOENT); 2271 } 2272 2273 int 2274 resource_int_value(const char *name, int unit, const char *resname, int *result) 2275 { 2276 struct config_resource *res; 2277 long kvalue = 0; 2278 int error; 2279 2280 if (resource_kenv(name, unit, resname, &kvalue) == 0) { 2281 *result = (int)kvalue; 2282 return 0; 2283 } 2284 if ((error = resource_find(name, unit, resname, &res)) != 0) 2285 return(error); 2286 if (res->type != RES_INT) 2287 return(EFTYPE); 2288 *result = res->u.intval; 2289 return(0); 2290 } 2291 2292 int 2293 resource_long_value(const char *name, int unit, const char *resname, 2294 long *result) 2295 { 2296 struct config_resource *res; 2297 long kvalue; 2298 int error; 2299 2300 if (resource_kenv(name, unit, resname, &kvalue) == 0) { 2301 *result = kvalue; 2302 return 0; 2303 } 2304 if ((error = resource_find(name, unit, resname, &res)) != 0) 2305 return(error); 2306 if (res->type != RES_LONG) 2307 return(EFTYPE); 2308 *result = res->u.longval; 2309 return(0); 2310 } 2311 2312 int 2313 resource_string_value(const char *name, int unit, const char *resname, 2314 const char **result) 2315 { 2316 int error; 2317 struct config_resource *res; 2318 char buf[64]; 2319 const char *env; 2320 2321 /* 2322 * DragonFly style loader.conf hinting 2323 */ 2324 ksnprintf(buf, sizeof(buf), "%s%d.%s", name, unit, resname); 2325 if ((env = kgetenv(buf)) != NULL) { 2326 *result = env; 2327 return 0; 2328 } 2329 2330 /* 2331 * Also support FreeBSD style loader.conf hinting 2332 */ 2333 ksnprintf(buf, sizeof(buf), "hint.%s.%d.%s", name, unit, resname); 2334 if ((env = kgetenv(buf)) != NULL) { 2335 *result = env; 2336 return 0; 2337 } 2338 2339 if ((error = resource_find(name, unit, resname, &res)) != 0) 2340 return(error); 2341 if (res->type != RES_STRING) 2342 return(EFTYPE); 2343 *result = res->u.stringval; 2344 return(0); 2345 } 2346 2347 int 2348 resource_query_string(int i, const char *resname, const char *value) 2349 { 2350 if (i < 0) 2351 i = 0; 2352 else 2353 i = i + 1; 2354 for (; i < devtab_count; i++) 2355 if (resource_match_string(i, resname, value) >= 0) 2356 return(i); 2357 return(-1); 2358 } 2359 2360 int 2361 resource_locate(int i, const char *resname) 2362 { 2363 if (i < 0) 2364 i = 0; 2365 else 2366 i = i + 1; 2367 for (; i < devtab_count; i++) 2368 if (!strcmp(devtab[i].name, resname)) 2369 return(i); 2370 return(-1); 2371 } 2372 2373 int 2374 resource_count(void) 2375 { 2376 return(devtab_count); 2377 } 2378 2379 char * 2380 resource_query_name(int i) 2381 { 2382 return(devtab[i].name); 2383 } 2384 2385 int 2386 resource_query_unit(int i) 2387 { 2388 return(devtab[i].unit); 2389 } 2390 2391 static int 2392 resource_create(const char *name, int unit, const char *resname, 2393 resource_type type, struct config_resource **result) 2394 { 2395 int i, j; 2396 struct config_resource *res = NULL; 2397 2398 for (i = 0; i < devtab_count; i++) 2399 if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { 2400 res = devtab[i].resources; 2401 break; 2402 } 2403 if (res == NULL) { 2404 i = resource_new_name(name, unit); 2405 if (i < 0) 2406 return(ENOMEM); 2407 res = devtab[i].resources; 2408 } 2409 for (j = 0; j < devtab[i].resource_count; j++, res++) 2410 if (!strcmp(res->name, resname)) { 2411 *result = res; 2412 return(0); 2413 } 2414 j = resource_new_resname(i, resname, type); 2415 if (j < 0) 2416 return(ENOMEM); 2417 res = &devtab[i].resources[j]; 2418 *result = res; 2419 return(0); 2420 } 2421 2422 int 2423 resource_set_int(const char *name, int unit, const char *resname, int value) 2424 { 2425 int error; 2426 struct config_resource *res; 2427 2428 error = resource_create(name, unit, resname, RES_INT, &res); 2429 if (error) 2430 return(error); 2431 if (res->type != RES_INT) 2432 return(EFTYPE); 2433 res->u.intval = value; 2434 return(0); 2435 } 2436 2437 int 2438 resource_set_long(const char *name, int unit, const char *resname, long value) 2439 { 2440 int error; 2441 struct config_resource *res; 2442 2443 error = resource_create(name, unit, resname, RES_LONG, &res); 2444 if (error) 2445 return(error); 2446 if (res->type != RES_LONG) 2447 return(EFTYPE); 2448 res->u.longval = value; 2449 return(0); 2450 } 2451 2452 int 2453 resource_set_string(const char *name, int unit, const char *resname, 2454 const char *value) 2455 { 2456 int error; 2457 struct config_resource *res; 2458 2459 error = resource_create(name, unit, resname, RES_STRING, &res); 2460 if (error) 2461 return(error); 2462 if (res->type != RES_STRING) 2463 return(EFTYPE); 2464 if (res->u.stringval) 2465 kfree(res->u.stringval, M_TEMP); 2466 res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT); 2467 if (res->u.stringval == NULL) 2468 return(ENOMEM); 2469 strcpy(res->u.stringval, value); 2470 return(0); 2471 } 2472 2473 static void 2474 resource_cfgload(void *dummy __unused) 2475 { 2476 struct config_resource *res, *cfgres; 2477 int i, j; 2478 int error; 2479 char *name, *resname; 2480 int unit; 2481 resource_type type; 2482 char *stringval; 2483 int config_devtab_count; 2484 2485 config_devtab_count = devtab_count; 2486 devtab = NULL; 2487 devtab_count = 0; 2488 2489 for (i = 0; i < config_devtab_count; i++) { 2490 name = config_devtab[i].name; 2491 unit = config_devtab[i].unit; 2492 2493 for (j = 0; j < config_devtab[i].resource_count; j++) { 2494 cfgres = config_devtab[i].resources; 2495 resname = cfgres[j].name; 2496 type = cfgres[j].type; 2497 error = resource_create(name, unit, resname, type, 2498 &res); 2499 if (error) { 2500 kprintf("create resource %s%d: error %d\n", 2501 name, unit, error); 2502 continue; 2503 } 2504 if (res->type != type) { 2505 kprintf("type mismatch %s%d: %d != %d\n", 2506 name, unit, res->type, type); 2507 continue; 2508 } 2509 switch (type) { 2510 case RES_INT: 2511 res->u.intval = cfgres[j].u.intval; 2512 break; 2513 case RES_LONG: 2514 res->u.longval = cfgres[j].u.longval; 2515 break; 2516 case RES_STRING: 2517 if (res->u.stringval) 2518 kfree(res->u.stringval, M_TEMP); 2519 stringval = cfgres[j].u.stringval; 2520 res->u.stringval = kmalloc(strlen(stringval) + 1, 2521 M_TEMP, M_INTWAIT); 2522 if (res->u.stringval == NULL) 2523 break; 2524 strcpy(res->u.stringval, stringval); 2525 break; 2526 default: 2527 panic("unknown resource type %d", type); 2528 } 2529 } 2530 } 2531 } 2532 SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0); 2533 2534 2535 /*======================================*/ 2536 /* 2537 * Some useful method implementations to make life easier for bus drivers. 2538 */ 2539 2540 void 2541 resource_list_init(struct resource_list *rl) 2542 { 2543 SLIST_INIT(rl); 2544 } 2545 2546 void 2547 resource_list_free(struct resource_list *rl) 2548 { 2549 struct resource_list_entry *rle; 2550 2551 while ((rle = SLIST_FIRST(rl)) != NULL) { 2552 if (rle->res) 2553 panic("resource_list_free: resource entry is busy"); 2554 SLIST_REMOVE_HEAD(rl, link); 2555 kfree(rle, M_BUS); 2556 } 2557 } 2558 2559 void 2560 resource_list_add(struct resource_list *rl, int type, int rid, 2561 u_long start, u_long end, u_long count, int cpuid) 2562 { 2563 struct resource_list_entry *rle; 2564 2565 rle = resource_list_find(rl, type, rid); 2566 if (rle == NULL) { 2567 rle = kmalloc(sizeof(struct resource_list_entry), M_BUS, 2568 M_INTWAIT); 2569 SLIST_INSERT_HEAD(rl, rle, link); 2570 rle->type = type; 2571 rle->rid = rid; 2572 rle->res = NULL; 2573 rle->cpuid = -1; 2574 } 2575 2576 if (rle->res) 2577 panic("resource_list_add: resource entry is busy"); 2578 2579 rle->start = start; 2580 rle->end = end; 2581 rle->count = count; 2582 2583 if (cpuid != -1) { 2584 if (rle->cpuid != -1 && rle->cpuid != cpuid) { 2585 panic("resource_list_add: moving from cpu%d -> cpu%d", 2586 rle->cpuid, cpuid); 2587 } 2588 rle->cpuid = cpuid; 2589 } 2590 } 2591 2592 struct resource_list_entry* 2593 resource_list_find(struct resource_list *rl, 2594 int type, int rid) 2595 { 2596 struct resource_list_entry *rle; 2597 2598 SLIST_FOREACH(rle, rl, link) 2599 if (rle->type == type && rle->rid == rid) 2600 return(rle); 2601 return(NULL); 2602 } 2603 2604 void 2605 resource_list_delete(struct resource_list *rl, 2606 int type, int rid) 2607 { 2608 struct resource_list_entry *rle = resource_list_find(rl, type, rid); 2609 2610 if (rle) { 2611 if (rle->res != NULL) 2612 panic("resource_list_delete: resource has not been released"); 2613 SLIST_REMOVE(rl, rle, resource_list_entry, link); 2614 kfree(rle, M_BUS); 2615 } 2616 } 2617 2618 struct resource * 2619 resource_list_alloc(struct resource_list *rl, 2620 device_t bus, device_t child, 2621 int type, int *rid, 2622 u_long start, u_long end, 2623 u_long count, u_int flags, int cpuid) 2624 { 2625 struct resource_list_entry *rle = NULL; 2626 int passthrough = (device_get_parent(child) != bus); 2627 int isdefault = (start == 0UL && end == ~0UL); 2628 2629 if (passthrough) { 2630 return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2631 type, rid, 2632 start, end, count, flags, cpuid)); 2633 } 2634 2635 rle = resource_list_find(rl, type, *rid); 2636 2637 if (!rle) 2638 return(0); /* no resource of that type/rid */ 2639 2640 if (rle->res) 2641 panic("resource_list_alloc: resource entry is busy"); 2642 2643 if (isdefault) { 2644 start = rle->start; 2645 count = max(count, rle->count); 2646 end = max(rle->end, start + count - 1); 2647 } 2648 cpuid = rle->cpuid; 2649 2650 rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, 2651 type, rid, start, end, count, 2652 flags, cpuid); 2653 2654 /* 2655 * Record the new range. 2656 */ 2657 if (rle->res) { 2658 rle->start = rman_get_start(rle->res); 2659 rle->end = rman_get_end(rle->res); 2660 rle->count = count; 2661 } 2662 2663 return(rle->res); 2664 } 2665 2666 int 2667 resource_list_release(struct resource_list *rl, 2668 device_t bus, device_t child, 2669 int type, int rid, struct resource *res) 2670 { 2671 struct resource_list_entry *rle = NULL; 2672 int passthrough = (device_get_parent(child) != bus); 2673 int error; 2674 2675 if (passthrough) { 2676 return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2677 type, rid, res)); 2678 } 2679 2680 rle = resource_list_find(rl, type, rid); 2681 2682 if (!rle) 2683 panic("resource_list_release: can't find resource"); 2684 if (!rle->res) 2685 panic("resource_list_release: resource entry is not busy"); 2686 2687 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, 2688 type, rid, res); 2689 if (error) 2690 return(error); 2691 2692 rle->res = NULL; 2693 return(0); 2694 } 2695 2696 int 2697 resource_list_print_type(struct resource_list *rl, const char *name, int type, 2698 const char *format) 2699 { 2700 struct resource_list_entry *rle; 2701 int printed, retval; 2702 2703 printed = 0; 2704 retval = 0; 2705 /* Yes, this is kinda cheating */ 2706 SLIST_FOREACH(rle, rl, link) { 2707 if (rle->type == type) { 2708 if (printed == 0) 2709 retval += kprintf(" %s ", name); 2710 else 2711 retval += kprintf(","); 2712 printed++; 2713 retval += kprintf(format, rle->start); 2714 if (rle->count > 1) { 2715 retval += kprintf("-"); 2716 retval += kprintf(format, rle->start + 2717 rle->count - 1); 2718 } 2719 } 2720 } 2721 return(retval); 2722 } 2723 2724 /* 2725 * Generic driver/device identify functions. These will install a device 2726 * rendezvous point under the parent using the same name as the driver 2727 * name, which will at a later time be probed and attached. 2728 * 2729 * These functions are used when the parent does not 'scan' its bus for 2730 * matching devices, or for the particular devices using these functions, 2731 * or when the device is a pseudo or synthesized device (such as can be 2732 * found under firewire and ppbus). 2733 */ 2734 int 2735 bus_generic_identify(driver_t *driver, device_t parent) 2736 { 2737 if (parent->state == DS_ATTACHED) 2738 return (0); 2739 BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); 2740 return (0); 2741 } 2742 2743 int 2744 bus_generic_identify_sameunit(driver_t *driver, device_t parent) 2745 { 2746 if (parent->state == DS_ATTACHED) 2747 return (0); 2748 BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); 2749 return (0); 2750 } 2751 2752 /* 2753 * Call DEVICE_IDENTIFY for each driver. 2754 */ 2755 int 2756 bus_generic_probe(device_t dev) 2757 { 2758 devclass_t dc = dev->devclass; 2759 driverlink_t dl; 2760 2761 TAILQ_FOREACH(dl, &dc->drivers, link) { 2762 DEVICE_IDENTIFY(dl->driver, dev); 2763 } 2764 2765 return(0); 2766 } 2767 2768 /* 2769 * This is an aweful hack due to the isa bus and autoconf code not 2770 * probing the ISA devices until after everything else has configured. 2771 * The ISA bus did a dummy attach long ago so we have to set it back 2772 * to an earlier state so the probe thinks its the initial probe and 2773 * not a bus rescan. 2774 * 2775 * XXX remove by properly defering the ISA bus scan. 2776 */ 2777 int 2778 bus_generic_probe_hack(device_t dev) 2779 { 2780 if (dev->state == DS_ATTACHED) { 2781 dev->state = DS_ALIVE; 2782 bus_generic_probe(dev); 2783 dev->state = DS_ATTACHED; 2784 } 2785 return (0); 2786 } 2787 2788 int 2789 bus_generic_attach(device_t dev) 2790 { 2791 device_t child; 2792 2793 TAILQ_FOREACH(child, &dev->children, link) { 2794 device_probe_and_attach(child); 2795 } 2796 2797 return(0); 2798 } 2799 2800 int 2801 bus_generic_attach_gpri(device_t dev, u_int gpri) 2802 { 2803 device_t child; 2804 2805 TAILQ_FOREACH(child, &dev->children, link) { 2806 device_probe_and_attach_gpri(child, gpri); 2807 } 2808 2809 return(0); 2810 } 2811 2812 int 2813 bus_generic_detach(device_t dev) 2814 { 2815 device_t child; 2816 int error; 2817 2818 if (dev->state != DS_ATTACHED) 2819 return(EBUSY); 2820 2821 TAILQ_FOREACH(child, &dev->children, link) 2822 if ((error = device_detach(child)) != 0) 2823 return(error); 2824 2825 return 0; 2826 } 2827 2828 int 2829 bus_generic_shutdown(device_t dev) 2830 { 2831 device_t child; 2832 2833 TAILQ_FOREACH(child, &dev->children, link) 2834 device_shutdown(child); 2835 2836 return(0); 2837 } 2838 2839 int 2840 bus_generic_suspend(device_t dev) 2841 { 2842 int error; 2843 device_t child, child2; 2844 2845 TAILQ_FOREACH(child, &dev->children, link) { 2846 error = DEVICE_SUSPEND(child); 2847 if (error) { 2848 for (child2 = TAILQ_FIRST(&dev->children); 2849 child2 && child2 != child; 2850 child2 = TAILQ_NEXT(child2, link)) 2851 DEVICE_RESUME(child2); 2852 return(error); 2853 } 2854 } 2855 return(0); 2856 } 2857 2858 int 2859 bus_generic_resume(device_t dev) 2860 { 2861 device_t child; 2862 2863 TAILQ_FOREACH(child, &dev->children, link) 2864 DEVICE_RESUME(child); 2865 /* if resume fails, there's nothing we can usefully do... */ 2866 2867 return(0); 2868 } 2869 2870 int 2871 bus_print_child_header(device_t dev, device_t child) 2872 { 2873 int retval = 0; 2874 2875 if (device_get_desc(child)) 2876 retval += device_printf(child, "<%s>", device_get_desc(child)); 2877 else 2878 retval += kprintf("%s", device_get_nameunit(child)); 2879 if (bootverbose) { 2880 if (child->state != DS_ATTACHED) 2881 kprintf(" [tentative]"); 2882 else 2883 kprintf(" [attached!]"); 2884 } 2885 return(retval); 2886 } 2887 2888 int 2889 bus_print_child_footer(device_t dev, device_t child) 2890 { 2891 return(kprintf(" on %s\n", device_get_nameunit(dev))); 2892 } 2893 2894 device_t 2895 bus_generic_add_child(device_t dev, device_t child, int order, 2896 const char *name, int unit) 2897 { 2898 if (dev->parent) 2899 dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); 2900 else 2901 dev = device_add_child_ordered(child, order, name, unit); 2902 return(dev); 2903 2904 } 2905 2906 int 2907 bus_generic_print_child(device_t dev, device_t child) 2908 { 2909 int retval = 0; 2910 2911 retval += bus_print_child_header(dev, child); 2912 retval += bus_print_child_footer(dev, child); 2913 2914 return(retval); 2915 } 2916 2917 int 2918 bus_generic_read_ivar(device_t dev, device_t child, int index, 2919 uintptr_t * result) 2920 { 2921 int error; 2922 2923 if (dev->parent) 2924 error = BUS_READ_IVAR(dev->parent, child, index, result); 2925 else 2926 error = ENOENT; 2927 return (error); 2928 } 2929 2930 int 2931 bus_generic_write_ivar(device_t dev, device_t child, int index, 2932 uintptr_t value) 2933 { 2934 int error; 2935 2936 if (dev->parent) 2937 error = BUS_WRITE_IVAR(dev->parent, child, index, value); 2938 else 2939 error = ENOENT; 2940 return (error); 2941 } 2942 2943 /* 2944 * Resource list are used for iterations, do not recurse. 2945 */ 2946 struct resource_list * 2947 bus_generic_get_resource_list(device_t dev, device_t child) 2948 { 2949 return (NULL); 2950 } 2951 2952 void 2953 bus_generic_driver_added(device_t dev, driver_t *driver) 2954 { 2955 device_t child; 2956 2957 DEVICE_IDENTIFY(driver, dev); 2958 TAILQ_FOREACH(child, &dev->children, link) { 2959 if (child->state == DS_NOTPRESENT) 2960 device_probe_and_attach(child); 2961 } 2962 } 2963 2964 int 2965 bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, 2966 int flags, driver_intr_t *intr, void *arg, void **cookiep, 2967 lwkt_serialize_t serializer, const char *desc) 2968 { 2969 /* Propagate up the bus hierarchy until someone handles it. */ 2970 if (dev->parent) { 2971 return BUS_SETUP_INTR(dev->parent, child, irq, flags, 2972 intr, arg, cookiep, serializer, desc); 2973 } else { 2974 return EINVAL; 2975 } 2976 } 2977 2978 int 2979 bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, 2980 void *cookie) 2981 { 2982 /* Propagate up the bus hierarchy until someone handles it. */ 2983 if (dev->parent) 2984 return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); 2985 else 2986 return(EINVAL); 2987 } 2988 2989 int 2990 bus_generic_disable_intr(device_t dev, device_t child, void *cookie) 2991 { 2992 if (dev->parent) 2993 return(BUS_DISABLE_INTR(dev->parent, child, cookie)); 2994 else 2995 return(0); 2996 } 2997 2998 void 2999 bus_generic_enable_intr(device_t dev, device_t child, void *cookie) 3000 { 3001 if (dev->parent) 3002 BUS_ENABLE_INTR(dev->parent, child, cookie); 3003 } 3004 3005 int 3006 bus_generic_config_intr(device_t dev, device_t child, int irq, enum intr_trigger trig, 3007 enum intr_polarity pol) 3008 { 3009 /* Propagate up the bus hierarchy until someone handles it. */ 3010 if (dev->parent) 3011 return(BUS_CONFIG_INTR(dev->parent, child, irq, trig, pol)); 3012 else 3013 return(EINVAL); 3014 } 3015 3016 struct resource * 3017 bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, 3018 u_long start, u_long end, u_long count, u_int flags, int cpuid) 3019 { 3020 /* Propagate up the bus hierarchy until someone handles it. */ 3021 if (dev->parent) 3022 return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, 3023 start, end, count, flags, cpuid)); 3024 else 3025 return(NULL); 3026 } 3027 3028 int 3029 bus_generic_release_resource(device_t dev, device_t child, int type, int rid, 3030 struct resource *r) 3031 { 3032 /* Propagate up the bus hierarchy until someone handles it. */ 3033 if (dev->parent) 3034 return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); 3035 else 3036 return(EINVAL); 3037 } 3038 3039 int 3040 bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, 3041 struct resource *r) 3042 { 3043 /* Propagate up the bus hierarchy until someone handles it. */ 3044 if (dev->parent) 3045 return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); 3046 else 3047 return(EINVAL); 3048 } 3049 3050 int 3051 bus_generic_deactivate_resource(device_t dev, device_t child, int type, 3052 int rid, struct resource *r) 3053 { 3054 /* Propagate up the bus hierarchy until someone handles it. */ 3055 if (dev->parent) 3056 return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, 3057 r)); 3058 else 3059 return(EINVAL); 3060 } 3061 3062 int 3063 bus_generic_get_resource(device_t dev, device_t child, int type, int rid, 3064 u_long *startp, u_long *countp) 3065 { 3066 int error; 3067 3068 error = ENOENT; 3069 if (dev->parent) { 3070 error = BUS_GET_RESOURCE(dev->parent, child, type, rid, 3071 startp, countp); 3072 } 3073 return (error); 3074 } 3075 3076 int 3077 bus_generic_set_resource(device_t dev, device_t child, int type, int rid, 3078 u_long start, u_long count, int cpuid) 3079 { 3080 int error; 3081 3082 error = EINVAL; 3083 if (dev->parent) { 3084 error = BUS_SET_RESOURCE(dev->parent, child, type, rid, 3085 start, count, cpuid); 3086 } 3087 return (error); 3088 } 3089 3090 void 3091 bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) 3092 { 3093 if (dev->parent) 3094 BUS_DELETE_RESOURCE(dev, child, type, rid); 3095 } 3096 3097 /** 3098 * @brief Helper function for implementing BUS_GET_DMA_TAG(). 3099 * 3100 * This simple implementation of BUS_GET_DMA_TAG() simply calls the 3101 * BUS_GET_DMA_TAG() method of the parent of @p dev. 3102 */ 3103 bus_dma_tag_t 3104 bus_generic_get_dma_tag(device_t dev, device_t child) 3105 { 3106 3107 /* Propagate up the bus hierarchy until someone handles it. */ 3108 if (dev->parent != NULL) 3109 return (BUS_GET_DMA_TAG(dev->parent, child)); 3110 return (NULL); 3111 } 3112 3113 int 3114 bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, 3115 u_long *startp, u_long *countp) 3116 { 3117 struct resource_list *rl = NULL; 3118 struct resource_list_entry *rle = NULL; 3119 3120 rl = BUS_GET_RESOURCE_LIST(dev, child); 3121 if (!rl) 3122 return(EINVAL); 3123 3124 rle = resource_list_find(rl, type, rid); 3125 if (!rle) 3126 return(ENOENT); 3127 3128 if (startp) 3129 *startp = rle->start; 3130 if (countp) 3131 *countp = rle->count; 3132 3133 return(0); 3134 } 3135 3136 int 3137 bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, 3138 u_long start, u_long count, int cpuid) 3139 { 3140 struct resource_list *rl = NULL; 3141 3142 rl = BUS_GET_RESOURCE_LIST(dev, child); 3143 if (!rl) 3144 return(EINVAL); 3145 3146 resource_list_add(rl, type, rid, start, (start + count - 1), count, 3147 cpuid); 3148 3149 return(0); 3150 } 3151 3152 void 3153 bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) 3154 { 3155 struct resource_list *rl = NULL; 3156 3157 rl = BUS_GET_RESOURCE_LIST(dev, child); 3158 if (!rl) 3159 return; 3160 3161 resource_list_delete(rl, type, rid); 3162 } 3163 3164 int 3165 bus_generic_rl_release_resource(device_t dev, device_t child, int type, 3166 int rid, struct resource *r) 3167 { 3168 struct resource_list *rl = NULL; 3169 3170 rl = BUS_GET_RESOURCE_LIST(dev, child); 3171 if (!rl) 3172 return(EINVAL); 3173 3174 return(resource_list_release(rl, dev, child, type, rid, r)); 3175 } 3176 3177 struct resource * 3178 bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, 3179 int *rid, u_long start, u_long end, u_long count, u_int flags, int cpuid) 3180 { 3181 struct resource_list *rl = NULL; 3182 3183 rl = BUS_GET_RESOURCE_LIST(dev, child); 3184 if (!rl) 3185 return(NULL); 3186 3187 return(resource_list_alloc(rl, dev, child, type, rid, 3188 start, end, count, flags, cpuid)); 3189 } 3190 3191 int 3192 bus_generic_child_present(device_t bus, device_t child) 3193 { 3194 return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); 3195 } 3196 3197 3198 /* 3199 * Some convenience functions to make it easier for drivers to use the 3200 * resource-management functions. All these really do is hide the 3201 * indirection through the parent's method table, making for slightly 3202 * less-wordy code. In the future, it might make sense for this code 3203 * to maintain some sort of a list of resources allocated by each device. 3204 */ 3205 int 3206 bus_alloc_resources(device_t dev, struct resource_spec *rs, 3207 struct resource **res) 3208 { 3209 int i; 3210 3211 for (i = 0; rs[i].type != -1; i++) 3212 res[i] = NULL; 3213 for (i = 0; rs[i].type != -1; i++) { 3214 res[i] = bus_alloc_resource_any(dev, 3215 rs[i].type, &rs[i].rid, rs[i].flags); 3216 if (res[i] == NULL) { 3217 bus_release_resources(dev, rs, res); 3218 return (ENXIO); 3219 } 3220 } 3221 return (0); 3222 } 3223 3224 void 3225 bus_release_resources(device_t dev, const struct resource_spec *rs, 3226 struct resource **res) 3227 { 3228 int i; 3229 3230 for (i = 0; rs[i].type != -1; i++) 3231 if (res[i] != NULL) { 3232 bus_release_resource( 3233 dev, rs[i].type, rs[i].rid, res[i]); 3234 res[i] = NULL; 3235 } 3236 } 3237 3238 struct resource * 3239 bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, 3240 u_long count, u_int flags) 3241 { 3242 if (dev->parent == NULL) 3243 return(0); 3244 return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, 3245 count, flags, -1)); 3246 } 3247 3248 struct resource * 3249 bus_alloc_legacy_irq_resource(device_t dev, int *rid, u_long irq, u_int flags) 3250 { 3251 if (dev->parent == NULL) 3252 return(0); 3253 return BUS_ALLOC_RESOURCE(dev->parent, dev, SYS_RES_IRQ, rid, 3254 irq, irq, 1, flags, machintr_legacy_intr_cpuid(irq)); 3255 } 3256 3257 int 3258 bus_activate_resource(device_t dev, int type, int rid, struct resource *r) 3259 { 3260 if (dev->parent == NULL) 3261 return(EINVAL); 3262 return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 3263 } 3264 3265 int 3266 bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) 3267 { 3268 if (dev->parent == NULL) 3269 return(EINVAL); 3270 return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); 3271 } 3272 3273 int 3274 bus_release_resource(device_t dev, int type, int rid, struct resource *r) 3275 { 3276 if (dev->parent == NULL) 3277 return(EINVAL); 3278 return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); 3279 } 3280 3281 int 3282 bus_setup_intr_descr(device_t dev, struct resource *r, int flags, 3283 driver_intr_t handler, void *arg, void **cookiep, 3284 lwkt_serialize_t serializer, const char *desc) 3285 { 3286 if (dev->parent == NULL) 3287 return EINVAL; 3288 return BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, 3289 cookiep, serializer, desc); 3290 } 3291 3292 int 3293 bus_setup_intr(device_t dev, struct resource *r, int flags, 3294 driver_intr_t handler, void *arg, void **cookiep, 3295 lwkt_serialize_t serializer) 3296 { 3297 return bus_setup_intr_descr(dev, r, flags, handler, arg, cookiep, 3298 serializer, NULL); 3299 } 3300 3301 int 3302 bus_teardown_intr(device_t dev, struct resource *r, void *cookie) 3303 { 3304 if (dev->parent == NULL) 3305 return(EINVAL); 3306 return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); 3307 } 3308 3309 void 3310 bus_enable_intr(device_t dev, void *cookie) 3311 { 3312 if (dev->parent) 3313 BUS_ENABLE_INTR(dev->parent, dev, cookie); 3314 } 3315 3316 int 3317 bus_disable_intr(device_t dev, void *cookie) 3318 { 3319 if (dev->parent) 3320 return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); 3321 else 3322 return(0); 3323 } 3324 3325 int 3326 bus_set_resource(device_t dev, int type, int rid, 3327 u_long start, u_long count, int cpuid) 3328 { 3329 return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, 3330 start, count, cpuid)); 3331 } 3332 3333 int 3334 bus_get_resource(device_t dev, int type, int rid, 3335 u_long *startp, u_long *countp) 3336 { 3337 return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 3338 startp, countp)); 3339 } 3340 3341 u_long 3342 bus_get_resource_start(device_t dev, int type, int rid) 3343 { 3344 u_long start, count; 3345 int error; 3346 3347 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 3348 &start, &count); 3349 if (error) 3350 return(0); 3351 return(start); 3352 } 3353 3354 u_long 3355 bus_get_resource_count(device_t dev, int type, int rid) 3356 { 3357 u_long start, count; 3358 int error; 3359 3360 error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, 3361 &start, &count); 3362 if (error) 3363 return(0); 3364 return(count); 3365 } 3366 3367 void 3368 bus_delete_resource(device_t dev, int type, int rid) 3369 { 3370 BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); 3371 } 3372 3373 int 3374 bus_child_present(device_t child) 3375 { 3376 return (BUS_CHILD_PRESENT(device_get_parent(child), child)); 3377 } 3378 3379 int 3380 bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) 3381 { 3382 device_t parent; 3383 3384 parent = device_get_parent(child); 3385 if (parent == NULL) { 3386 *buf = '\0'; 3387 return (0); 3388 } 3389 return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); 3390 } 3391 3392 int 3393 bus_child_location_str(device_t child, char *buf, size_t buflen) 3394 { 3395 device_t parent; 3396 3397 parent = device_get_parent(child); 3398 if (parent == NULL) { 3399 *buf = '\0'; 3400 return (0); 3401 } 3402 return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); 3403 } 3404 3405 /** 3406 * @brief Wrapper function for BUS_GET_DMA_TAG(). 3407 * 3408 * This function simply calls the BUS_GET_DMA_TAG() method of the 3409 * parent of @p dev. 3410 */ 3411 bus_dma_tag_t 3412 bus_get_dma_tag(device_t dev) 3413 { 3414 device_t parent; 3415 3416 parent = device_get_parent(dev); 3417 if (parent == NULL) 3418 return (NULL); 3419 return (BUS_GET_DMA_TAG(parent, dev)); 3420 } 3421 3422 static int 3423 root_print_child(device_t dev, device_t child) 3424 { 3425 return(0); 3426 } 3427 3428 static int 3429 root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, 3430 void **cookiep, lwkt_serialize_t serializer, const char *desc) 3431 { 3432 /* 3433 * If an interrupt mapping gets to here something bad has happened. 3434 */ 3435 panic("root_setup_intr"); 3436 } 3437 3438 /* 3439 * If we get here, assume that the device is permanant and really is 3440 * present in the system. Removable bus drivers are expected to intercept 3441 * this call long before it gets here. We return -1 so that drivers that 3442 * really care can check vs -1 or some ERRNO returned higher in the food 3443 * chain. 3444 */ 3445 static int 3446 root_child_present(device_t dev, device_t child) 3447 { 3448 return(-1); 3449 } 3450 3451 /* 3452 * XXX NOTE! other defaults may be set in bus_if.m 3453 */ 3454 static kobj_method_t root_methods[] = { 3455 /* Device interface */ 3456 KOBJMETHOD(device_shutdown, bus_generic_shutdown), 3457 KOBJMETHOD(device_suspend, bus_generic_suspend), 3458 KOBJMETHOD(device_resume, bus_generic_resume), 3459 3460 /* Bus interface */ 3461 KOBJMETHOD(bus_add_child, bus_generic_add_child), 3462 KOBJMETHOD(bus_print_child, root_print_child), 3463 KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), 3464 KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), 3465 KOBJMETHOD(bus_setup_intr, root_setup_intr), 3466 KOBJMETHOD(bus_child_present, root_child_present), 3467 3468 KOBJMETHOD_END 3469 }; 3470 3471 static driver_t root_driver = { 3472 "root", 3473 root_methods, 3474 1, /* no softc */ 3475 }; 3476 3477 device_t root_bus; 3478 devclass_t root_devclass; 3479 3480 static int 3481 root_bus_module_handler(module_t mod, int what, void* arg) 3482 { 3483 switch (what) { 3484 case MOD_LOAD: 3485 TAILQ_INIT(&bus_data_devices); 3486 root_bus = make_device(NULL, "root", 0); 3487 root_bus->desc = "System root bus"; 3488 kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); 3489 root_bus->driver = &root_driver; 3490 root_bus->state = DS_ALIVE; 3491 root_devclass = devclass_find_internal("root", NULL, FALSE); 3492 devinit(); 3493 return(0); 3494 3495 case MOD_SHUTDOWN: 3496 device_shutdown(root_bus); 3497 return(0); 3498 default: 3499 return(0); 3500 } 3501 } 3502 3503 static moduledata_t root_bus_mod = { 3504 "rootbus", 3505 root_bus_module_handler, 3506 0 3507 }; 3508 DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 3509 3510 void 3511 root_bus_configure(void) 3512 { 3513 int warncount; 3514 device_t dev; 3515 3516 PDEBUG((".")); 3517 3518 /* 3519 * handle device_identify based device attachments to the root_bus 3520 * (typically nexus). 3521 */ 3522 bus_generic_probe(root_bus); 3523 3524 /* 3525 * Probe and attach the devices under root_bus. 3526 */ 3527 TAILQ_FOREACH(dev, &root_bus->children, link) { 3528 device_probe_and_attach(dev); 3529 } 3530 3531 /* 3532 * Wait for all asynchronous attaches to complete. If we don't 3533 * our legacy ISA bus scan could steal device unit numbers or 3534 * even I/O ports. 3535 */ 3536 warncount = 10; 3537 if (numasyncthreads) 3538 kprintf("Waiting for async drivers to attach\n"); 3539 while (numasyncthreads > 0) { 3540 if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK) 3541 --warncount; 3542 if (warncount == 0) { 3543 kprintf("Warning: Still waiting for %d " 3544 "drivers to attach\n", numasyncthreads); 3545 } else if (warncount == -30) { 3546 kprintf("Giving up on %d drivers\n", numasyncthreads); 3547 break; 3548 } 3549 } 3550 root_bus->state = DS_ATTACHED; 3551 } 3552 3553 int 3554 driver_module_handler(module_t mod, int what, void *arg) 3555 { 3556 int error; 3557 struct driver_module_data *dmd; 3558 devclass_t bus_devclass; 3559 kobj_class_t driver; 3560 const char *parentname; 3561 3562 dmd = (struct driver_module_data *)arg; 3563 bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); 3564 error = 0; 3565 3566 switch (what) { 3567 case MOD_LOAD: 3568 if (dmd->dmd_chainevh) 3569 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3570 3571 driver = dmd->dmd_driver; 3572 PDEBUG(("Loading module: driver %s on bus %s", 3573 DRIVERNAME(driver), dmd->dmd_busname)); 3574 3575 /* 3576 * If the driver has any base classes, make the 3577 * devclass inherit from the devclass of the driver's 3578 * first base class. This will allow the system to 3579 * search for drivers in both devclasses for children 3580 * of a device using this driver. 3581 */ 3582 if (driver->baseclasses) 3583 parentname = driver->baseclasses[0]->name; 3584 else 3585 parentname = NULL; 3586 *dmd->dmd_devclass = devclass_find_internal(driver->name, 3587 parentname, TRUE); 3588 3589 error = devclass_add_driver(bus_devclass, driver); 3590 if (error) 3591 break; 3592 break; 3593 3594 case MOD_UNLOAD: 3595 PDEBUG(("Unloading module: driver %s from bus %s", 3596 DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); 3597 error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); 3598 3599 if (!error && dmd->dmd_chainevh) 3600 error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); 3601 break; 3602 } 3603 3604 return (error); 3605 } 3606 3607 #ifdef BUS_DEBUG 3608 3609 /* 3610 * The _short versions avoid iteration by not calling anything that prints 3611 * more than oneliners. I love oneliners. 3612 */ 3613 3614 static void 3615 print_device_short(device_t dev, int indent) 3616 { 3617 if (!dev) 3618 return; 3619 3620 indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", 3621 dev->unit, dev->desc, 3622 (dev->parent? "":"no "), 3623 (TAILQ_EMPTY(&dev->children)? "no ":""), 3624 (dev->flags&DF_ENABLED? "enabled,":"disabled,"), 3625 (dev->flags&DF_FIXEDCLASS? "fixed,":""), 3626 (dev->flags&DF_WILDCARD? "wildcard,":""), 3627 (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), 3628 (dev->ivars? "":"no "), 3629 (dev->softc? "":"no "), 3630 dev->busy)); 3631 } 3632 3633 static void 3634 print_device(device_t dev, int indent) 3635 { 3636 if (!dev) 3637 return; 3638 3639 print_device_short(dev, indent); 3640 3641 indentprintf(("Parent:\n")); 3642 print_device_short(dev->parent, indent+1); 3643 indentprintf(("Driver:\n")); 3644 print_driver_short(dev->driver, indent+1); 3645 indentprintf(("Devclass:\n")); 3646 print_devclass_short(dev->devclass, indent+1); 3647 } 3648 3649 /* 3650 * Print the device and all its children (indented). 3651 */ 3652 void 3653 print_device_tree_short(device_t dev, int indent) 3654 { 3655 device_t child; 3656 3657 if (!dev) 3658 return; 3659 3660 print_device_short(dev, indent); 3661 3662 TAILQ_FOREACH(child, &dev->children, link) 3663 print_device_tree_short(child, indent+1); 3664 } 3665 3666 /* 3667 * Print the device and all its children (indented). 3668 */ 3669 void 3670 print_device_tree(device_t dev, int indent) 3671 { 3672 device_t child; 3673 3674 if (!dev) 3675 return; 3676 3677 print_device(dev, indent); 3678 3679 TAILQ_FOREACH(child, &dev->children, link) 3680 print_device_tree(child, indent+1); 3681 } 3682 3683 static void 3684 print_driver_short(driver_t *driver, int indent) 3685 { 3686 if (!driver) 3687 return; 3688 3689 indentprintf(("driver %s: softc size = %zu\n", 3690 driver->name, driver->size)); 3691 } 3692 3693 static void 3694 print_driver(driver_t *driver, int indent) 3695 { 3696 if (!driver) 3697 return; 3698 3699 print_driver_short(driver, indent); 3700 } 3701 3702 3703 static void 3704 print_driver_list(driver_list_t drivers, int indent) 3705 { 3706 driverlink_t driver; 3707 3708 TAILQ_FOREACH(driver, &drivers, link) 3709 print_driver(driver->driver, indent); 3710 } 3711 3712 static void 3713 print_devclass_short(devclass_t dc, int indent) 3714 { 3715 if (!dc) 3716 return; 3717 3718 indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); 3719 } 3720 3721 static void 3722 print_devclass(devclass_t dc, int indent) 3723 { 3724 int i; 3725 3726 if (!dc) 3727 return; 3728 3729 print_devclass_short(dc, indent); 3730 indentprintf(("Drivers:\n")); 3731 print_driver_list(dc->drivers, indent+1); 3732 3733 indentprintf(("Devices:\n")); 3734 for (i = 0; i < dc->maxunit; i++) 3735 if (dc->devices[i]) 3736 print_device(dc->devices[i], indent+1); 3737 } 3738 3739 void 3740 print_devclass_list_short(void) 3741 { 3742 devclass_t dc; 3743 3744 kprintf("Short listing of devclasses, drivers & devices:\n"); 3745 TAILQ_FOREACH(dc, &devclasses, link) { 3746 print_devclass_short(dc, 0); 3747 } 3748 } 3749 3750 void 3751 print_devclass_list(void) 3752 { 3753 devclass_t dc; 3754 3755 kprintf("Full listing of devclasses, drivers & devices:\n"); 3756 TAILQ_FOREACH(dc, &devclasses, link) { 3757 print_devclass(dc, 0); 3758 } 3759 } 3760 3761 #endif 3762 3763 /* 3764 * Check to see if a device is disabled via a disabled hint. 3765 */ 3766 int 3767 resource_disabled(const char *name, int unit) 3768 { 3769 int error, value; 3770 3771 error = resource_int_value(name, unit, "disabled", &value); 3772 if (error) 3773 return(0); 3774 return(value); 3775 } 3776 3777 /* 3778 * User-space access to the device tree. 3779 * 3780 * We implement a small set of nodes: 3781 * 3782 * hw.bus Single integer read method to obtain the 3783 * current generation count. 3784 * hw.bus.devices Reads the entire device tree in flat space. 3785 * hw.bus.rman Resource manager interface 3786 * 3787 * We might like to add the ability to scan devclasses and/or drivers to 3788 * determine what else is currently loaded/available. 3789 */ 3790 3791 static int 3792 sysctl_bus(SYSCTL_HANDLER_ARGS) 3793 { 3794 struct u_businfo ubus; 3795 3796 ubus.ub_version = BUS_USER_VERSION; 3797 ubus.ub_generation = bus_data_generation; 3798 3799 return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); 3800 } 3801 SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, 3802 "bus-related data"); 3803 3804 static int 3805 sysctl_devices(SYSCTL_HANDLER_ARGS) 3806 { 3807 int *name = (int *)arg1; 3808 u_int namelen = arg2; 3809 int index; 3810 device_t dev; 3811 struct u_device udev; /* XXX this is a bit big */ 3812 int error; 3813 3814 if (namelen != 2) 3815 return (EINVAL); 3816 3817 if (bus_data_generation_check(name[0])) 3818 return (EINVAL); 3819 3820 index = name[1]; 3821 3822 /* 3823 * Scan the list of devices, looking for the requested index. 3824 */ 3825 TAILQ_FOREACH(dev, &bus_data_devices, devlink) { 3826 if (index-- == 0) 3827 break; 3828 } 3829 if (dev == NULL) 3830 return (ENOENT); 3831 3832 /* 3833 * Populate the return array. 3834 */ 3835 bzero(&udev, sizeof(udev)); 3836 udev.dv_handle = (uintptr_t)dev; 3837 udev.dv_parent = (uintptr_t)dev->parent; 3838 if (dev->nameunit != NULL) 3839 strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); 3840 if (dev->desc != NULL) 3841 strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); 3842 if (dev->driver != NULL && dev->driver->name != NULL) 3843 strlcpy(udev.dv_drivername, dev->driver->name, 3844 sizeof(udev.dv_drivername)); 3845 bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); 3846 bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); 3847 udev.dv_devflags = dev->devflags; 3848 udev.dv_flags = dev->flags; 3849 udev.dv_state = dev->state; 3850 error = SYSCTL_OUT(req, &udev, sizeof(udev)); 3851 return (error); 3852 } 3853 3854 SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, 3855 "system device tree"); 3856 3857 int 3858 bus_data_generation_check(int generation) 3859 { 3860 if (generation != bus_data_generation) 3861 return (1); 3862 3863 /* XXX generate optimised lists here? */ 3864 return (0); 3865 } 3866 3867 void 3868 bus_data_generation_update(void) 3869 { 3870 bus_data_generation++; 3871 } 3872 3873 const char * 3874 intr_str_polarity(enum intr_polarity pola) 3875 { 3876 switch (pola) { 3877 case INTR_POLARITY_LOW: 3878 return "low"; 3879 3880 case INTR_POLARITY_HIGH: 3881 return "high"; 3882 3883 case INTR_POLARITY_CONFORM: 3884 return "conform"; 3885 } 3886 return "unknown"; 3887 } 3888 3889 const char * 3890 intr_str_trigger(enum intr_trigger trig) 3891 { 3892 switch (trig) { 3893 case INTR_TRIGGER_EDGE: 3894 return "edge"; 3895 3896 case INTR_TRIGGER_LEVEL: 3897 return "level"; 3898 3899 case INTR_TRIGGER_CONFORM: 3900 return "conform"; 3901 } 3902 return "unknown"; 3903 } 3904 3905 int 3906 device_getenv_int(device_t dev, const char *knob, int def) 3907 { 3908 char env[128]; 3909 3910 /* Deprecated; for compat */ 3911 ksnprintf(env, sizeof(env), "hw.%s.%s", device_get_nameunit(dev), knob); 3912 kgetenv_int(env, &def); 3913 3914 /* Prefer dev.driver.unit.knob */ 3915 ksnprintf(env, sizeof(env), "dev.%s.%d.%s", 3916 device_get_name(dev), device_get_unit(dev), knob); 3917 kgetenv_int(env, &def); 3918 3919 return def; 3920 } 3921 3922 void 3923 device_getenv_string(device_t dev, const char *knob, char * __restrict data, 3924 int dlen, const char * __restrict def) 3925 { 3926 char env[128]; 3927 3928 strlcpy(data, def, dlen); 3929 3930 /* Deprecated; for compat */ 3931 ksnprintf(env, sizeof(env), "hw.%s.%s", device_get_nameunit(dev), knob); 3932 kgetenv_string(env, data, dlen); 3933 3934 /* Prefer dev.driver.unit.knob */ 3935 ksnprintf(env, sizeof(env), "dev.%s.%d.%s", 3936 device_get_name(dev), device_get_unit(dev), knob); 3937 kgetenv_string(env, data, dlen); 3938 } 3939