| 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 | * $DragonFly: src/sys/kern/subr_bus.c,v 1.46 2008/10/03 00:26:21 hasso Exp $ |
| 28 | */ |
| 29 | |
| 30 | #include "opt_bus.h" |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/queue.h> |
| 34 | #include <sys/malloc.h> |
| 35 | #include <sys/kernel.h> |
| 36 | #include <sys/module.h> |
| 37 | #include <sys/kobj.h> |
| 38 | #include <sys/bus_private.h> |
| 39 | #include <sys/sysctl.h> |
| 40 | #include <sys/systm.h> |
| 41 | #include <sys/bus.h> |
| 42 | #include <sys/rman.h> |
| 43 | #include <sys/device.h> |
| 44 | #include <sys/lock.h> |
| 45 | #include <sys/conf.h> |
| 46 | #include <sys/selinfo.h> |
| 47 | #include <sys/uio.h> |
| 48 | #include <sys/filio.h> |
| 49 | #include <sys/poll.h> |
| 50 | #include <sys/signalvar.h> |
| 51 | |
| 52 | #include <machine/stdarg.h> /* for device_printf() */ |
| 53 | |
| 54 | #include <sys/thread2.h> |
| 55 | |
| 56 | SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL); |
| 57 | |
| 58 | MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); |
| 59 | |
| 60 | #ifdef BUS_DEBUG |
| 61 | #define PDEBUG(a) (kprintf("%s:%d: ", __func__, __LINE__), kprintf a, kprintf("\n")) |
| 62 | #define DEVICENAME(d) ((d)? device_get_name(d): "no device") |
| 63 | #define DRIVERNAME(d) ((d)? d->name : "no driver") |
| 64 | #define DEVCLANAME(d) ((d)? d->name : "no devclass") |
| 65 | |
| 66 | /* Produce the indenting, indent*2 spaces plus a '.' ahead of that to |
| 67 | * prevent syslog from deleting initial spaces |
| 68 | */ |
| 69 | #define indentprintf(p) do { int iJ; kprintf("."); for (iJ=0; iJ<indent; iJ++) kprintf(" "); kprintf p ; } while(0) |
| 70 | |
| 71 | static void print_device_short(device_t dev, int indent); |
| 72 | static void print_device(device_t dev, int indent); |
| 73 | void print_device_tree_short(device_t dev, int indent); |
| 74 | void print_device_tree(device_t dev, int indent); |
| 75 | static void print_driver_short(driver_t *driver, int indent); |
| 76 | static void print_driver(driver_t *driver, int indent); |
| 77 | static void print_driver_list(driver_list_t drivers, int indent); |
| 78 | static void print_devclass_short(devclass_t dc, int indent); |
| 79 | static void print_devclass(devclass_t dc, int indent); |
| 80 | void print_devclass_list_short(void); |
| 81 | void print_devclass_list(void); |
| 82 | |
| 83 | #else |
| 84 | /* Make the compiler ignore the function calls */ |
| 85 | #define PDEBUG(a) /* nop */ |
| 86 | #define DEVICENAME(d) /* nop */ |
| 87 | #define DRIVERNAME(d) /* nop */ |
| 88 | #define DEVCLANAME(d) /* nop */ |
| 89 | |
| 90 | #define print_device_short(d,i) /* nop */ |
| 91 | #define print_device(d,i) /* nop */ |
| 92 | #define print_device_tree_short(d,i) /* nop */ |
| 93 | #define print_device_tree(d,i) /* nop */ |
| 94 | #define print_driver_short(d,i) /* nop */ |
| 95 | #define print_driver(d,i) /* nop */ |
| 96 | #define print_driver_list(d,i) /* nop */ |
| 97 | #define print_devclass_short(d,i) /* nop */ |
| 98 | #define print_devclass(d,i) /* nop */ |
| 99 | #define print_devclass_list_short() /* nop */ |
| 100 | #define print_devclass_list() /* nop */ |
| 101 | #endif |
| 102 | |
| 103 | static void device_attach_async(device_t dev); |
| 104 | static void device_attach_thread(void *arg); |
| 105 | static int device_doattach(device_t dev); |
| 106 | |
| 107 | static int do_async_attach = 0; |
| 108 | static int numasyncthreads; |
| 109 | TUNABLE_INT("kern.do_async_attach", &do_async_attach); |
| 110 | |
| 111 | /* |
| 112 | * /dev/devctl implementation |
| 113 | */ |
| 114 | |
| 115 | /* |
| 116 | * This design allows only one reader for /dev/devctl. This is not desirable |
| 117 | * in the long run, but will get a lot of hair out of this implementation. |
| 118 | * Maybe we should make this device a clonable device. |
| 119 | * |
| 120 | * Also note: we specifically do not attach a device to the device_t tree |
| 121 | * to avoid potential chicken and egg problems. One could argue that all |
| 122 | * of this belongs to the root node. One could also further argue that the |
| 123 | * sysctl interface that we have not might more properly be an ioctl |
| 124 | * interface, but at this stage of the game, I'm not inclined to rock that |
| 125 | * boat. |
| 126 | * |
| 127 | * I'm also not sure that the SIGIO support is done correctly or not, as |
| 128 | * I copied it from a driver that had SIGIO support that likely hasn't been |
| 129 | * tested since 3.4 or 2.2.8! |
| 130 | */ |
| 131 | |
| 132 | static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS); |
| 133 | static int devctl_disable = 0; |
| 134 | TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable); |
| 135 | SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable, CTLTYPE_INT | CTLFLAG_RW, 0, 0, |
| 136 | sysctl_devctl_disable, "I", "devctl disable"); |
| 137 | |
| 138 | #define CDEV_MAJOR 188 |
| 139 | |
| 140 | static d_open_t devopen; |
| 141 | static d_close_t devclose; |
| 142 | static d_read_t devread; |
| 143 | static d_ioctl_t devioctl; |
| 144 | static d_poll_t devpoll; |
| 145 | |
| 146 | static struct dev_ops devctl_ops = { |
| 147 | { "devctl", CDEV_MAJOR, 0 }, |
| 148 | .d_open = devopen, |
| 149 | .d_close = devclose, |
| 150 | .d_read = devread, |
| 151 | .d_ioctl = devioctl, |
| 152 | .d_poll = devpoll, |
| 153 | }; |
| 154 | |
| 155 | struct dev_event_info |
| 156 | { |
| 157 | char *dei_data; |
| 158 | TAILQ_ENTRY(dev_event_info) dei_link; |
| 159 | }; |
| 160 | |
| 161 | TAILQ_HEAD(devq, dev_event_info); |
| 162 | |
| 163 | static struct dev_softc |
| 164 | { |
| 165 | int inuse; |
| 166 | int nonblock; |
| 167 | struct lock lock; |
| 168 | struct selinfo sel; |
| 169 | struct devq devq; |
| 170 | struct proc *async_proc; |
| 171 | } devsoftc; |
| 172 | |
| 173 | static void |
| 174 | devinit(void) |
| 175 | { |
| 176 | make_dev(&devctl_ops, 0, UID_ROOT, GID_WHEEL, 0600, "devctl"); |
| 177 | lockinit(&devsoftc.lock, "dev mtx", 0, 0); |
| 178 | TAILQ_INIT(&devsoftc.devq); |
| 179 | } |
| 180 | |
| 181 | static int |
| 182 | devopen(struct dev_open_args *ap) |
| 183 | { |
| 184 | if (devsoftc.inuse) |
| 185 | return (EBUSY); |
| 186 | /* move to init */ |
| 187 | devsoftc.inuse = 1; |
| 188 | devsoftc.nonblock = 0; |
| 189 | devsoftc.async_proc = NULL; |
| 190 | return (0); |
| 191 | } |
| 192 | |
| 193 | static int |
| 194 | devclose(struct dev_close_args *ap) |
| 195 | { |
| 196 | devsoftc.inuse = 0; |
| 197 | lockmgr(&devsoftc.lock, LK_EXCLUSIVE); |
| 198 | wakeup(&devsoftc); |
| 199 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 200 | |
| 201 | return (0); |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * The read channel for this device is used to report changes to |
| 206 | * userland in realtime. We are required to free the data as well as |
| 207 | * the n1 object because we allocate them separately. Also note that |
| 208 | * we return one record at a time. If you try to read this device a |
| 209 | * character at a time, you will lose the rest of the data. Listening |
| 210 | * programs are expected to cope. |
| 211 | */ |
| 212 | static int |
| 213 | devread(struct dev_read_args *ap) |
| 214 | { |
| 215 | struct uio *uio = ap->a_uio; |
| 216 | struct dev_event_info *n1; |
| 217 | int rv; |
| 218 | |
| 219 | lockmgr(&devsoftc.lock, LK_EXCLUSIVE); |
| 220 | while (TAILQ_EMPTY(&devsoftc.devq)) { |
| 221 | if (devsoftc.nonblock) { |
| 222 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 223 | return (EAGAIN); |
| 224 | } |
| 225 | tsleep_interlock(&devsoftc, PCATCH); |
| 226 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 227 | rv = tsleep(&devsoftc, PCATCH | PINTERLOCKED, "devctl", 0); |
| 228 | lockmgr(&devsoftc.lock, LK_EXCLUSIVE); |
| 229 | if (rv) { |
| 230 | /* |
| 231 | * Need to translate ERESTART to EINTR here? -- jake |
| 232 | */ |
| 233 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 234 | return (rv); |
| 235 | } |
| 236 | } |
| 237 | n1 = TAILQ_FIRST(&devsoftc.devq); |
| 238 | TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); |
| 239 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 240 | rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio); |
| 241 | kfree(n1->dei_data, M_BUS); |
| 242 | kfree(n1, M_BUS); |
| 243 | return (rv); |
| 244 | } |
| 245 | |
| 246 | static int |
| 247 | devioctl(struct dev_ioctl_args *ap) |
| 248 | { |
| 249 | switch (ap->a_cmd) { |
| 250 | |
| 251 | case FIONBIO: |
| 252 | if (*(int*)ap->a_data) |
| 253 | devsoftc.nonblock = 1; |
| 254 | else |
| 255 | devsoftc.nonblock = 0; |
| 256 | return (0); |
| 257 | case FIOASYNC: |
| 258 | if (*(int*)ap->a_data) |
| 259 | devsoftc.async_proc = curproc; |
| 260 | else |
| 261 | devsoftc.async_proc = NULL; |
| 262 | return (0); |
| 263 | |
| 264 | /* (un)Support for other fcntl() calls. */ |
| 265 | case FIOCLEX: |
| 266 | case FIONCLEX: |
| 267 | case FIONREAD: |
| 268 | case FIOSETOWN: |
| 269 | case FIOGETOWN: |
| 270 | default: |
| 271 | break; |
| 272 | } |
| 273 | return (ENOTTY); |
| 274 | } |
| 275 | |
| 276 | static int |
| 277 | devpoll(struct dev_poll_args *ap) |
| 278 | { |
| 279 | int revents = 0; |
| 280 | |
| 281 | lockmgr(&devsoftc.lock, LK_EXCLUSIVE); |
| 282 | if (ap->a_events & (POLLIN | POLLRDNORM)) { |
| 283 | if (!TAILQ_EMPTY(&devsoftc.devq)) |
| 284 | revents = ap->a_events & (POLLIN | POLLRDNORM); |
| 285 | else |
| 286 | selrecord(curthread, &devsoftc.sel); |
| 287 | } |
| 288 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 289 | |
| 290 | ap->a_events = revents; |
| 291 | return (0); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * @brief Return whether the userland process is running |
| 296 | */ |
| 297 | boolean_t |
| 298 | devctl_process_running(void) |
| 299 | { |
| 300 | return (devsoftc.inuse == 1); |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * @brief Queue data to be read from the devctl device |
| 305 | * |
| 306 | * Generic interface to queue data to the devctl device. It is |
| 307 | * assumed that @p data is properly formatted. It is further assumed |
| 308 | * that @p data is allocated using the M_BUS malloc type. |
| 309 | */ |
| 310 | void |
| 311 | devctl_queue_data(char *data) |
| 312 | { |
| 313 | struct dev_event_info *n1 = NULL; |
| 314 | struct proc *p; |
| 315 | |
| 316 | n1 = kmalloc(sizeof(*n1), M_BUS, M_NOWAIT); |
| 317 | if (n1 == NULL) |
| 318 | return; |
| 319 | n1->dei_data = data; |
| 320 | lockmgr(&devsoftc.lock, LK_EXCLUSIVE); |
| 321 | TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link); |
| 322 | wakeup(&devsoftc); |
| 323 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 324 | get_mplock(); /* XXX */ |
| 325 | selwakeup(&devsoftc.sel); |
| 326 | rel_mplock(); /* XXX */ |
| 327 | p = devsoftc.async_proc; |
| 328 | if (p != NULL) |
| 329 | ksignal(p, SIGIO); |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * @brief Send a 'notification' to userland, using standard ways |
| 334 | */ |
| 335 | void |
| 336 | devctl_notify(const char *system, const char *subsystem, const char *type, |
| 337 | const char *data) |
| 338 | { |
| 339 | int len = 0; |
| 340 | char *msg; |
| 341 | |
| 342 | if (system == NULL) |
| 343 | return; /* BOGUS! Must specify system. */ |
| 344 | if (subsystem == NULL) |
| 345 | return; /* BOGUS! Must specify subsystem. */ |
| 346 | if (type == NULL) |
| 347 | return; /* BOGUS! Must specify type. */ |
| 348 | len += strlen(" system=") + strlen(system); |
| 349 | len += strlen(" subsystem=") + strlen(subsystem); |
| 350 | len += strlen(" type=") + strlen(type); |
| 351 | /* add in the data message plus newline. */ |
| 352 | if (data != NULL) |
| 353 | len += strlen(data); |
| 354 | len += 3; /* '!', '\n', and NUL */ |
| 355 | msg = kmalloc(len, M_BUS, M_NOWAIT); |
| 356 | if (msg == NULL) |
| 357 | return; /* Drop it on the floor */ |
| 358 | if (data != NULL) |
| 359 | ksnprintf(msg, len, "!system=%s subsystem=%s type=%s %s\n", |
| 360 | system, subsystem, type, data); |
| 361 | else |
| 362 | ksnprintf(msg, len, "!system=%s subsystem=%s type=%s\n", |
| 363 | system, subsystem, type); |
| 364 | devctl_queue_data(msg); |
| 365 | } |
| 366 | |
| 367 | /* |
| 368 | * Common routine that tries to make sending messages as easy as possible. |
| 369 | * We allocate memory for the data, copy strings into that, but do not |
| 370 | * free it unless there's an error. The dequeue part of the driver should |
| 371 | * free the data. We don't send data when the device is disabled. We do |
| 372 | * send data, even when we have no listeners, because we wish to avoid |
| 373 | * races relating to startup and restart of listening applications. |
| 374 | * |
| 375 | * devaddq is designed to string together the type of event, with the |
| 376 | * object of that event, plus the plug and play info and location info |
| 377 | * for that event. This is likely most useful for devices, but less |
| 378 | * useful for other consumers of this interface. Those should use |
| 379 | * the devctl_queue_data() interface instead. |
| 380 | */ |
| 381 | static void |
| 382 | devaddq(const char *type, const char *what, device_t dev) |
| 383 | { |
| 384 | char *data = NULL; |
| 385 | char *loc = NULL; |
| 386 | char *pnp = NULL; |
| 387 | const char *parstr; |
| 388 | |
| 389 | if (devctl_disable) |
| 390 | return; |
| 391 | data = kmalloc(1024, M_BUS, M_NOWAIT); |
| 392 | if (data == NULL) |
| 393 | goto bad; |
| 394 | |
| 395 | /* get the bus specific location of this device */ |
| 396 | loc = kmalloc(1024, M_BUS, M_NOWAIT); |
| 397 | if (loc == NULL) |
| 398 | goto bad; |
| 399 | *loc = '\0'; |
| 400 | bus_child_location_str(dev, loc, 1024); |
| 401 | |
| 402 | /* Get the bus specific pnp info of this device */ |
| 403 | pnp = kmalloc(1024, M_BUS, M_NOWAIT); |
| 404 | if (pnp == NULL) |
| 405 | goto bad; |
| 406 | *pnp = '\0'; |
| 407 | bus_child_pnpinfo_str(dev, pnp, 1024); |
| 408 | |
| 409 | /* Get the parent of this device, or / if high enough in the tree. */ |
| 410 | if (device_get_parent(dev) == NULL) |
| 411 | parstr = "."; /* Or '/' ? */ |
| 412 | else |
| 413 | parstr = device_get_nameunit(device_get_parent(dev)); |
| 414 | /* String it all together. */ |
| 415 | ksnprintf(data, 1024, "%s%s at %s %s on %s\n", type, what, loc, pnp, |
| 416 | parstr); |
| 417 | kfree(loc, M_BUS); |
| 418 | kfree(pnp, M_BUS); |
| 419 | devctl_queue_data(data); |
| 420 | return; |
| 421 | bad: |
| 422 | kfree(pnp, M_BUS); |
| 423 | kfree(loc, M_BUS); |
| 424 | kfree(data, M_BUS); |
| 425 | return; |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * A device was added to the tree. We are called just after it successfully |
| 430 | * attaches (that is, probe and attach success for this device). No call |
| 431 | * is made if a device is merely parented into the tree. See devnomatch |
| 432 | * if probe fails. If attach fails, no notification is sent (but maybe |
| 433 | * we should have a different message for this). |
| 434 | */ |
| 435 | static void |
| 436 | devadded(device_t dev) |
| 437 | { |
| 438 | char *pnp = NULL; |
| 439 | char *tmp = NULL; |
| 440 | |
| 441 | pnp = kmalloc(1024, M_BUS, M_NOWAIT); |
| 442 | if (pnp == NULL) |
| 443 | goto fail; |
| 444 | tmp = kmalloc(1024, M_BUS, M_NOWAIT); |
| 445 | if (tmp == NULL) |
| 446 | goto fail; |
| 447 | *pnp = '\0'; |
| 448 | bus_child_pnpinfo_str(dev, pnp, 1024); |
| 449 | ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); |
| 450 | devaddq("+", tmp, dev); |
| 451 | fail: |
| 452 | if (pnp != NULL) |
| 453 | kfree(pnp, M_BUS); |
| 454 | if (tmp != NULL) |
| 455 | kfree(tmp, M_BUS); |
| 456 | return; |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * A device was removed from the tree. We are called just before this |
| 461 | * happens. |
| 462 | */ |
| 463 | static void |
| 464 | devremoved(device_t dev) |
| 465 | { |
| 466 | char *pnp = NULL; |
| 467 | char *tmp = NULL; |
| 468 | |
| 469 | pnp = kmalloc(1024, M_BUS, M_NOWAIT); |
| 470 | if (pnp == NULL) |
| 471 | goto fail; |
| 472 | tmp = kmalloc(1024, M_BUS, M_NOWAIT); |
| 473 | if (tmp == NULL) |
| 474 | goto fail; |
| 475 | *pnp = '\0'; |
| 476 | bus_child_pnpinfo_str(dev, pnp, 1024); |
| 477 | ksnprintf(tmp, 1024, "%s %s", device_get_nameunit(dev), pnp); |
| 478 | devaddq("-", tmp, dev); |
| 479 | fail: |
| 480 | if (pnp != NULL) |
| 481 | kfree(pnp, M_BUS); |
| 482 | if (tmp != NULL) |
| 483 | kfree(tmp, M_BUS); |
| 484 | return; |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * Called when there's no match for this device. This is only called |
| 489 | * the first time that no match happens, so we don't keep getitng this |
| 490 | * message. Should that prove to be undesirable, we can change it. |
| 491 | * This is called when all drivers that can attach to a given bus |
| 492 | * decline to accept this device. Other errrors may not be detected. |
| 493 | */ |
| 494 | static void |
| 495 | devnomatch(device_t dev) |
| 496 | { |
| 497 | devaddq("?", "", dev); |
| 498 | } |
| 499 | |
| 500 | static int |
| 501 | sysctl_devctl_disable(SYSCTL_HANDLER_ARGS) |
| 502 | { |
| 503 | struct dev_event_info *n1; |
| 504 | int dis, error; |
| 505 | |
| 506 | dis = devctl_disable; |
| 507 | error = sysctl_handle_int(oidp, &dis, 0, req); |
| 508 | if (error || !req->newptr) |
| 509 | return (error); |
| 510 | lockmgr(&devsoftc.lock, LK_EXCLUSIVE); |
| 511 | devctl_disable = dis; |
| 512 | if (dis) { |
| 513 | while (!TAILQ_EMPTY(&devsoftc.devq)) { |
| 514 | n1 = TAILQ_FIRST(&devsoftc.devq); |
| 515 | TAILQ_REMOVE(&devsoftc.devq, n1, dei_link); |
| 516 | kfree(n1->dei_data, M_BUS); |
| 517 | kfree(n1, M_BUS); |
| 518 | } |
| 519 | } |
| 520 | lockmgr(&devsoftc.lock, LK_RELEASE); |
| 521 | return (0); |
| 522 | } |
| 523 | |
| 524 | /* End of /dev/devctl code */ |
| 525 | |
| 526 | TAILQ_HEAD(,device) bus_data_devices; |
| 527 | static int bus_data_generation = 1; |
| 528 | |
| 529 | kobj_method_t null_methods[] = { |
| 530 | { 0, 0 } |
| 531 | }; |
| 532 | |
| 533 | DEFINE_CLASS(null, null_methods, 0); |
| 534 | |
| 535 | /* |
| 536 | * Devclass implementation |
| 537 | */ |
| 538 | |
| 539 | static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses); |
| 540 | |
| 541 | static devclass_t |
| 542 | devclass_find_internal(const char *classname, const char *parentname, |
| 543 | int create) |
| 544 | { |
| 545 | devclass_t dc; |
| 546 | |
| 547 | PDEBUG(("looking for %s", classname)); |
| 548 | if (classname == NULL) |
| 549 | return(NULL); |
| 550 | |
| 551 | TAILQ_FOREACH(dc, &devclasses, link) |
| 552 | if (!strcmp(dc->name, classname)) |
| 553 | break; |
| 554 | |
| 555 | if (create && !dc) { |
| 556 | PDEBUG(("creating %s", classname)); |
| 557 | dc = kmalloc(sizeof(struct devclass) + strlen(classname) + 1, |
| 558 | M_BUS, M_INTWAIT | M_ZERO); |
| 559 | if (!dc) |
| 560 | return(NULL); |
| 561 | dc->parent = NULL; |
| 562 | dc->name = (char*) (dc + 1); |
| 563 | strcpy(dc->name, classname); |
| 564 | dc->devices = NULL; |
| 565 | dc->maxunit = 0; |
| 566 | TAILQ_INIT(&dc->drivers); |
| 567 | TAILQ_INSERT_TAIL(&devclasses, dc, link); |
| 568 | |
| 569 | bus_data_generation_update(); |
| 570 | |
| 571 | } |
| 572 | if (parentname && dc && !dc->parent) |
| 573 | dc->parent = devclass_find_internal(parentname, NULL, FALSE); |
| 574 | |
| 575 | return(dc); |
| 576 | } |
| 577 | |
| 578 | devclass_t |
| 579 | devclass_create(const char *classname) |
| 580 | { |
| 581 | return(devclass_find_internal(classname, NULL, TRUE)); |
| 582 | } |
| 583 | |
| 584 | devclass_t |
| 585 | devclass_find(const char *classname) |
| 586 | { |
| 587 | return(devclass_find_internal(classname, NULL, FALSE)); |
| 588 | } |
| 589 | |
| 590 | device_t |
| 591 | devclass_find_unit(const char *classname, int unit) |
| 592 | { |
| 593 | devclass_t dc; |
| 594 | |
| 595 | if ((dc = devclass_find(classname)) != NULL) |
| 596 | return(devclass_get_device(dc, unit)); |
| 597 | return (NULL); |
| 598 | } |
| 599 | |
| 600 | int |
| 601 | devclass_add_driver(devclass_t dc, driver_t *driver) |
| 602 | { |
| 603 | driverlink_t dl; |
| 604 | device_t dev; |
| 605 | int i; |
| 606 | |
| 607 | PDEBUG(("%s", DRIVERNAME(driver))); |
| 608 | |
| 609 | dl = kmalloc(sizeof *dl, M_BUS, M_INTWAIT | M_ZERO); |
| 610 | if (!dl) |
| 611 | return(ENOMEM); |
| 612 | |
| 613 | /* |
| 614 | * Compile the driver's methods. Also increase the reference count |
| 615 | * so that the class doesn't get freed when the last instance |
| 616 | * goes. This means we can safely use static methods and avoids a |
| 617 | * double-free in devclass_delete_driver. |
| 618 | */ |
| 619 | kobj_class_instantiate(driver); |
| 620 | |
| 621 | /* |
| 622 | * Make sure the devclass which the driver is implementing exists. |
| 623 | */ |
| 624 | devclass_find_internal(driver->name, NULL, TRUE); |
| 625 | |
| 626 | dl->driver = driver; |
| 627 | TAILQ_INSERT_TAIL(&dc->drivers, dl, link); |
| 628 | |
| 629 | /* |
| 630 | * Call BUS_DRIVER_ADDED for any existing busses in this class, |
| 631 | * but only if the bus has already been attached (otherwise we |
| 632 | * might probe too early). |
| 633 | * |
| 634 | * This is what will cause a newly loaded module to be associated |
| 635 | * with hardware. bus_generic_driver_added() is typically what ends |
| 636 | * up being called. |
| 637 | */ |
| 638 | for (i = 0; i < dc->maxunit; i++) { |
| 639 | if ((dev = dc->devices[i]) != NULL) { |
| 640 | if (dev->state >= DS_ATTACHED) |
| 641 | BUS_DRIVER_ADDED(dev, driver); |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | bus_data_generation_update(); |
| 646 | return(0); |
| 647 | } |
| 648 | |
| 649 | int |
| 650 | devclass_delete_driver(devclass_t busclass, driver_t *driver) |
| 651 | { |
| 652 | devclass_t dc = devclass_find(driver->name); |
| 653 | driverlink_t dl; |
| 654 | device_t dev; |
| 655 | int i; |
| 656 | int error; |
| 657 | |
| 658 | PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass))); |
| 659 | |
| 660 | if (!dc) |
| 661 | return(0); |
| 662 | |
| 663 | /* |
| 664 | * Find the link structure in the bus' list of drivers. |
| 665 | */ |
| 666 | TAILQ_FOREACH(dl, &busclass->drivers, link) |
| 667 | if (dl->driver == driver) |
| 668 | break; |
| 669 | |
| 670 | if (!dl) { |
| 671 | PDEBUG(("%s not found in %s list", driver->name, busclass->name)); |
| 672 | return(ENOENT); |
| 673 | } |
| 674 | |
| 675 | /* |
| 676 | * Disassociate from any devices. We iterate through all the |
| 677 | * devices in the devclass of the driver and detach any which are |
| 678 | * using the driver and which have a parent in the devclass which |
| 679 | * we are deleting from. |
| 680 | * |
| 681 | * Note that since a driver can be in multiple devclasses, we |
| 682 | * should not detach devices which are not children of devices in |
| 683 | * the affected devclass. |
| 684 | */ |
| 685 | for (i = 0; i < dc->maxunit; i++) |
| 686 | if (dc->devices[i]) { |
| 687 | dev = dc->devices[i]; |
| 688 | if (dev->driver == driver && dev->parent && |
| 689 | dev->parent->devclass == busclass) { |
| 690 | if ((error = device_detach(dev)) != 0) |
| 691 | return(error); |
| 692 | device_set_driver(dev, NULL); |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | TAILQ_REMOVE(&busclass->drivers, dl, link); |
| 697 | kfree(dl, M_BUS); |
| 698 | |
| 699 | kobj_class_uninstantiate(driver); |
| 700 | |
| 701 | bus_data_generation_update(); |
| 702 | return(0); |
| 703 | } |
| 704 | |
| 705 | static driverlink_t |
| 706 | devclass_find_driver_internal(devclass_t dc, const char *classname) |
| 707 | { |
| 708 | driverlink_t dl; |
| 709 | |
| 710 | PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc))); |
| 711 | |
| 712 | TAILQ_FOREACH(dl, &dc->drivers, link) |
| 713 | if (!strcmp(dl->driver->name, classname)) |
| 714 | return(dl); |
| 715 | |
| 716 | PDEBUG(("not found")); |
| 717 | return(NULL); |
| 718 | } |
| 719 | |
| 720 | kobj_class_t |
| 721 | devclass_find_driver(devclass_t dc, const char *classname) |
| 722 | { |
| 723 | driverlink_t dl; |
| 724 | |
| 725 | dl = devclass_find_driver_internal(dc, classname); |
| 726 | if (dl) |
| 727 | return(dl->driver); |
| 728 | else |
| 729 | return(NULL); |
| 730 | } |
| 731 | |
| 732 | const char * |
| 733 | devclass_get_name(devclass_t dc) |
| 734 | { |
| 735 | return(dc->name); |
| 736 | } |
| 737 | |
| 738 | device_t |
| 739 | devclass_get_device(devclass_t dc, int unit) |
| 740 | { |
| 741 | if (dc == NULL || unit < 0 || unit >= dc->maxunit) |
| 742 | return(NULL); |
| 743 | return(dc->devices[unit]); |
| 744 | } |
| 745 | |
| 746 | void * |
| 747 | devclass_get_softc(devclass_t dc, int unit) |
| 748 | { |
| 749 | device_t dev; |
| 750 | |
| 751 | dev = devclass_get_device(dc, unit); |
| 752 | if (!dev) |
| 753 | return(NULL); |
| 754 | |
| 755 | return(device_get_softc(dev)); |
| 756 | } |
| 757 | |
| 758 | int |
| 759 | devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp) |
| 760 | { |
| 761 | int i; |
| 762 | int count; |
| 763 | device_t *list; |
| 764 | |
| 765 | count = 0; |
| 766 | for (i = 0; i < dc->maxunit; i++) |
| 767 | if (dc->devices[i]) |
| 768 | count++; |
| 769 | |
| 770 | list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); |
| 771 | if (list == NULL) |
| 772 | return(ENOMEM); |
| 773 | |
| 774 | count = 0; |
| 775 | for (i = 0; i < dc->maxunit; i++) |
| 776 | if (dc->devices[i]) { |
| 777 | list[count] = dc->devices[i]; |
| 778 | count++; |
| 779 | } |
| 780 | |
| 781 | *devlistp = list; |
| 782 | *devcountp = count; |
| 783 | |
| 784 | return(0); |
| 785 | } |
| 786 | |
| 787 | /** |
| 788 | * @brief Get a list of drivers in the devclass |
| 789 | * |
| 790 | * An array containing a list of pointers to all the drivers in the |
| 791 | * given devclass is allocated and returned in @p *listp. The number |
| 792 | * of drivers in the array is returned in @p *countp. The caller should |
| 793 | * free the array using @c free(p, M_TEMP). |
| 794 | * |
| 795 | * @param dc the devclass to examine |
| 796 | * @param listp gives location for array pointer return value |
| 797 | * @param countp gives location for number of array elements |
| 798 | * return value |
| 799 | * |
| 800 | * @retval 0 success |
| 801 | * @retval ENOMEM the array allocation failed |
| 802 | */ |
| 803 | int |
| 804 | devclass_get_drivers(devclass_t dc, driver_t ***listp, int *countp) |
| 805 | { |
| 806 | driverlink_t dl; |
| 807 | driver_t **list; |
| 808 | int count; |
| 809 | |
| 810 | count = 0; |
| 811 | TAILQ_FOREACH(dl, &dc->drivers, link) |
| 812 | count++; |
| 813 | list = kmalloc(count * sizeof(driver_t *), M_TEMP, M_NOWAIT); |
| 814 | if (list == NULL) |
| 815 | return (ENOMEM); |
| 816 | |
| 817 | count = 0; |
| 818 | TAILQ_FOREACH(dl, &dc->drivers, link) { |
| 819 | list[count] = dl->driver; |
| 820 | count++; |
| 821 | } |
| 822 | *listp = list; |
| 823 | *countp = count; |
| 824 | |
| 825 | return (0); |
| 826 | } |
| 827 | |
| 828 | /** |
| 829 | * @brief Get the number of devices in a devclass |
| 830 | * |
| 831 | * @param dc the devclass to examine |
| 832 | */ |
| 833 | int |
| 834 | devclass_get_count(devclass_t dc) |
| 835 | { |
| 836 | int count, i; |
| 837 | |
| 838 | count = 0; |
| 839 | for (i = 0; i < dc->maxunit; i++) |
| 840 | if (dc->devices[i]) |
| 841 | count++; |
| 842 | return (count); |
| 843 | } |
| 844 | |
| 845 | int |
| 846 | devclass_get_maxunit(devclass_t dc) |
| 847 | { |
| 848 | return(dc->maxunit); |
| 849 | } |
| 850 | |
| 851 | void |
| 852 | devclass_set_parent(devclass_t dc, devclass_t pdc) |
| 853 | { |
| 854 | dc->parent = pdc; |
| 855 | } |
| 856 | |
| 857 | devclass_t |
| 858 | devclass_get_parent(devclass_t dc) |
| 859 | { |
| 860 | return(dc->parent); |
| 861 | } |
| 862 | |
| 863 | static int |
| 864 | devclass_alloc_unit(devclass_t dc, int *unitp) |
| 865 | { |
| 866 | int unit = *unitp; |
| 867 | |
| 868 | PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc))); |
| 869 | |
| 870 | /* If we have been given a wired unit number, check for existing device */ |
| 871 | if (unit != -1) { |
| 872 | if (unit >= 0 && unit < dc->maxunit && |
| 873 | dc->devices[unit] != NULL) { |
| 874 | if (bootverbose) |
| 875 | kprintf("%s-: %s%d exists, using next available unit number\n", |
| 876 | dc->name, dc->name, unit); |
| 877 | /* find the next available slot */ |
| 878 | while (++unit < dc->maxunit && dc->devices[unit] != NULL) |
| 879 | ; |
| 880 | } |
| 881 | } else { |
| 882 | /* Unwired device, find the next available slot for it */ |
| 883 | unit = 0; |
| 884 | while (unit < dc->maxunit && dc->devices[unit] != NULL) |
| 885 | unit++; |
| 886 | } |
| 887 | |
| 888 | /* |
| 889 | * We've selected a unit beyond the length of the table, so let's |
| 890 | * extend the table to make room for all units up to and including |
| 891 | * this one. |
| 892 | */ |
| 893 | if (unit >= dc->maxunit) { |
| 894 | device_t *newlist; |
| 895 | int newsize; |
| 896 | |
| 897 | newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t)); |
| 898 | newlist = kmalloc(sizeof(device_t) * newsize, M_BUS, |
| 899 | M_INTWAIT | M_ZERO); |
| 900 | if (newlist == NULL) |
| 901 | return(ENOMEM); |
| 902 | bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit); |
| 903 | if (dc->devices) |
| 904 | kfree(dc->devices, M_BUS); |
| 905 | dc->devices = newlist; |
| 906 | dc->maxunit = newsize; |
| 907 | } |
| 908 | PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc))); |
| 909 | |
| 910 | *unitp = unit; |
| 911 | return(0); |
| 912 | } |
| 913 | |
| 914 | static int |
| 915 | devclass_add_device(devclass_t dc, device_t dev) |
| 916 | { |
| 917 | int buflen, error; |
| 918 | |
| 919 | PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); |
| 920 | |
| 921 | buflen = strlen(dc->name) + 5; |
| 922 | dev->nameunit = kmalloc(buflen, M_BUS, M_INTWAIT | M_ZERO); |
| 923 | if (!dev->nameunit) |
| 924 | return(ENOMEM); |
| 925 | |
| 926 | if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) { |
| 927 | kfree(dev->nameunit, M_BUS); |
| 928 | dev->nameunit = NULL; |
| 929 | return(error); |
| 930 | } |
| 931 | dc->devices[dev->unit] = dev; |
| 932 | dev->devclass = dc; |
| 933 | ksnprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit); |
| 934 | |
| 935 | return(0); |
| 936 | } |
| 937 | |
| 938 | static int |
| 939 | devclass_delete_device(devclass_t dc, device_t dev) |
| 940 | { |
| 941 | if (!dc || !dev) |
| 942 | return(0); |
| 943 | |
| 944 | PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc))); |
| 945 | |
| 946 | if (dev->devclass != dc || dc->devices[dev->unit] != dev) |
| 947 | panic("devclass_delete_device: inconsistent device class"); |
| 948 | dc->devices[dev->unit] = NULL; |
| 949 | if (dev->flags & DF_WILDCARD) |
| 950 | dev->unit = -1; |
| 951 | dev->devclass = NULL; |
| 952 | kfree(dev->nameunit, M_BUS); |
| 953 | dev->nameunit = NULL; |
| 954 | |
| 955 | return(0); |
| 956 | } |
| 957 | |
| 958 | static device_t |
| 959 | make_device(device_t parent, const char *name, int unit) |
| 960 | { |
| 961 | device_t dev; |
| 962 | devclass_t dc; |
| 963 | |
| 964 | PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit)); |
| 965 | |
| 966 | if (name != NULL) { |
| 967 | dc = devclass_find_internal(name, NULL, TRUE); |
| 968 | if (!dc) { |
| 969 | kprintf("make_device: can't find device class %s\n", name); |
| 970 | return(NULL); |
| 971 | } |
| 972 | } else |
| 973 | dc = NULL; |
| 974 | |
| 975 | dev = kmalloc(sizeof(struct device), M_BUS, M_INTWAIT | M_ZERO); |
| 976 | if (!dev) |
| 977 | return(0); |
| 978 | |
| 979 | dev->parent = parent; |
| 980 | TAILQ_INIT(&dev->children); |
| 981 | kobj_init((kobj_t) dev, &null_class); |
| 982 | dev->driver = NULL; |
| 983 | dev->devclass = NULL; |
| 984 | dev->unit = unit; |
| 985 | dev->nameunit = NULL; |
| 986 | dev->desc = NULL; |
| 987 | dev->busy = 0; |
| 988 | dev->devflags = 0; |
| 989 | dev->flags = DF_ENABLED; |
| 990 | dev->order = 0; |
| 991 | if (unit == -1) |
| 992 | dev->flags |= DF_WILDCARD; |
| 993 | if (name) { |
| 994 | dev->flags |= DF_FIXEDCLASS; |
| 995 | if (devclass_add_device(dc, dev) != 0) { |
| 996 | kobj_delete((kobj_t)dev, M_BUS); |
| 997 | return(NULL); |
| 998 | } |
| 999 | } |
| 1000 | dev->ivars = NULL; |
| 1001 | dev->softc = NULL; |
| 1002 | |
| 1003 | dev->state = DS_NOTPRESENT; |
| 1004 | |
| 1005 | TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink); |
| 1006 | bus_data_generation_update(); |
| 1007 | |
| 1008 | return(dev); |
| 1009 | } |
| 1010 | |
| 1011 | static int |
| 1012 | device_print_child(device_t dev, device_t child) |
| 1013 | { |
| 1014 | int retval = 0; |
| 1015 | |
| 1016 | if (device_is_alive(child)) |
| 1017 | retval += BUS_PRINT_CHILD(dev, child); |
| 1018 | else |
| 1019 | retval += device_printf(child, " not found\n"); |
| 1020 | |
| 1021 | return(retval); |
| 1022 | } |
| 1023 | |
| 1024 | device_t |
| 1025 | device_add_child(device_t dev, const char *name, int unit) |
| 1026 | { |
| 1027 | return device_add_child_ordered(dev, 0, name, unit); |
| 1028 | } |
| 1029 | |
| 1030 | device_t |
| 1031 | device_add_child_ordered(device_t dev, int order, const char *name, int unit) |
| 1032 | { |
| 1033 | device_t child; |
| 1034 | device_t place; |
| 1035 | |
| 1036 | PDEBUG(("%s at %s with order %d as unit %d", name, DEVICENAME(dev), |
| 1037 | order, unit)); |
| 1038 | |
| 1039 | child = make_device(dev, name, unit); |
| 1040 | if (child == NULL) |
| 1041 | return child; |
| 1042 | child->order = order; |
| 1043 | |
| 1044 | TAILQ_FOREACH(place, &dev->children, link) |
| 1045 | if (place->order > order) |
| 1046 | break; |
| 1047 | |
| 1048 | if (place) { |
| 1049 | /* |
| 1050 | * The device 'place' is the first device whose order is |
| 1051 | * greater than the new child. |
| 1052 | */ |
| 1053 | TAILQ_INSERT_BEFORE(place, child, link); |
| 1054 | } else { |
| 1055 | /* |
| 1056 | * The new child's order is greater or equal to the order of |
| 1057 | * any existing device. Add the child to the tail of the list. |
| 1058 | */ |
| 1059 | TAILQ_INSERT_TAIL(&dev->children, child, link); |
| 1060 | } |
| 1061 | |
| 1062 | bus_data_generation_update(); |
| 1063 | return(child); |
| 1064 | } |
| 1065 | |
| 1066 | int |
| 1067 | device_delete_child(device_t dev, device_t child) |
| 1068 | { |
| 1069 | int error; |
| 1070 | device_t grandchild; |
| 1071 | |
| 1072 | PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); |
| 1073 | |
| 1074 | /* remove children first */ |
| 1075 | while ( (grandchild = TAILQ_FIRST(&child->children)) ) { |
| 1076 | error = device_delete_child(child, grandchild); |
| 1077 | if (error) |
| 1078 | return(error); |
| 1079 | } |
| 1080 | |
| 1081 | if ((error = device_detach(child)) != 0) |
| 1082 | return(error); |
| 1083 | if (child->devclass) |
| 1084 | devclass_delete_device(child->devclass, child); |
| 1085 | TAILQ_REMOVE(&dev->children, child, link); |
| 1086 | TAILQ_REMOVE(&bus_data_devices, child, devlink); |
| 1087 | device_set_desc(child, NULL); |
| 1088 | kobj_delete((kobj_t)child, M_BUS); |
| 1089 | |
| 1090 | bus_data_generation_update(); |
| 1091 | return(0); |
| 1092 | } |
| 1093 | |
| 1094 | /** |
| 1095 | * @brief Find a device given a unit number |
| 1096 | * |
| 1097 | * This is similar to devclass_get_devices() but only searches for |
| 1098 | * devices which have @p dev as a parent. |
| 1099 | * |
| 1100 | * @param dev the parent device to search |
| 1101 | * @param unit the unit number to search for. If the unit is -1, |
| 1102 | * return the first child of @p dev which has name |
| 1103 | * @p classname (that is, the one with the lowest unit.) |
| 1104 | * |
| 1105 | * @returns the device with the given unit number or @c |
| 1106 | * NULL if there is no such device |
| 1107 | */ |
| 1108 | device_t |
| 1109 | device_find_child(device_t dev, const char *classname, int unit) |
| 1110 | { |
| 1111 | devclass_t dc; |
| 1112 | device_t child; |
| 1113 | |
| 1114 | dc = devclass_find(classname); |
| 1115 | if (!dc) |
| 1116 | return(NULL); |
| 1117 | |
| 1118 | if (unit != -1) { |
| 1119 | child = devclass_get_device(dc, unit); |
| 1120 | if (child && child->parent == dev) |
| 1121 | return (child); |
| 1122 | } else { |
| 1123 | for (unit = 0; unit < devclass_get_maxunit(dc); unit++) { |
| 1124 | child = devclass_get_device(dc, unit); |
| 1125 | if (child && child->parent == dev) |
| 1126 | return (child); |
| 1127 | } |
| 1128 | } |
| 1129 | return(NULL); |
| 1130 | } |
| 1131 | |
| 1132 | static driverlink_t |
| 1133 | first_matching_driver(devclass_t dc, device_t dev) |
| 1134 | { |
| 1135 | if (dev->devclass) |
| 1136 | return(devclass_find_driver_internal(dc, dev->devclass->name)); |
| 1137 | else |
| 1138 | return(TAILQ_FIRST(&dc->drivers)); |
| 1139 | } |
| 1140 | |
| 1141 | static driverlink_t |
| 1142 | next_matching_driver(devclass_t dc, device_t dev, driverlink_t last) |
| 1143 | { |
| 1144 | if (dev->devclass) { |
| 1145 | driverlink_t dl; |
| 1146 | for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link)) |
| 1147 | if (!strcmp(dev->devclass->name, dl->driver->name)) |
| 1148 | return(dl); |
| 1149 | return(NULL); |
| 1150 | } else |
| 1151 | return(TAILQ_NEXT(last, link)); |
| 1152 | } |
| 1153 | |
| 1154 | static int |
| 1155 | device_probe_child(device_t dev, device_t child) |
| 1156 | { |
| 1157 | devclass_t dc; |
| 1158 | driverlink_t best = 0; |
| 1159 | driverlink_t dl; |
| 1160 | int result, pri = 0; |
| 1161 | int hasclass = (child->devclass != 0); |
| 1162 | |
| 1163 | dc = dev->devclass; |
| 1164 | if (!dc) |
| 1165 | panic("device_probe_child: parent device has no devclass"); |
| 1166 | |
| 1167 | if (child->state == DS_ALIVE) |
| 1168 | return(0); |
| 1169 | |
| 1170 | for (; dc; dc = dc->parent) { |
| 1171 | for (dl = first_matching_driver(dc, child); dl; |
| 1172 | dl = next_matching_driver(dc, child, dl)) { |
| 1173 | PDEBUG(("Trying %s", DRIVERNAME(dl->driver))); |
| 1174 | device_set_driver(child, dl->driver); |
| 1175 | if (!hasclass) |
| 1176 | device_set_devclass(child, dl->driver->name); |
| 1177 | result = DEVICE_PROBE(child); |
| 1178 | if (!hasclass) |
| 1179 | device_set_devclass(child, 0); |
| 1180 | |
| 1181 | /* |
| 1182 | * If the driver returns SUCCESS, there can be |
| 1183 | * no higher match for this device. |
| 1184 | */ |
| 1185 | if (result == 0) { |
| 1186 | best = dl; |
| 1187 | pri = 0; |
| 1188 | break; |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * The driver returned an error so it |
| 1193 | * certainly doesn't match. |
| 1194 | */ |
| 1195 | if (result > 0) { |
| 1196 | device_set_driver(child, 0); |
| 1197 | continue; |
| 1198 | } |
| 1199 | |
| 1200 | /* |
| 1201 | * A priority lower than SUCCESS, remember the |
| 1202 | * best matching driver. Initialise the value |
| 1203 | * of pri for the first match. |
| 1204 | */ |
| 1205 | if (best == 0 || result > pri) { |
| 1206 | best = dl; |
| 1207 | pri = result; |
| 1208 | continue; |
| 1209 | } |
| 1210 | } |
| 1211 | /* |
| 1212 | * If we have unambiguous match in this devclass, |
| 1213 | * don't look in the parent. |
| 1214 | */ |
| 1215 | if (best && pri == 0) |
| 1216 | break; |
| 1217 | } |
| 1218 | |
| 1219 | /* |
| 1220 | * If we found a driver, change state and initialise the devclass. |
| 1221 | */ |
| 1222 | if (best) { |
| 1223 | if (!child->devclass) |
| 1224 | device_set_devclass(child, best->driver->name); |
| 1225 | device_set_driver(child, best->driver); |
| 1226 | if (pri < 0) { |
| 1227 | /* |
| 1228 | * A bit bogus. Call the probe method again to make |
| 1229 | * sure that we have the right description. |
| 1230 | */ |
| 1231 | DEVICE_PROBE(child); |
| 1232 | } |
| 1233 | |
| 1234 | bus_data_generation_update(); |
| 1235 | child->state = DS_ALIVE; |
| 1236 | return(0); |
| 1237 | } |
| 1238 | |
| 1239 | return(ENXIO); |
| 1240 | } |
| 1241 | |
| 1242 | device_t |
| 1243 | device_get_parent(device_t dev) |
| 1244 | { |
| 1245 | return dev->parent; |
| 1246 | } |
| 1247 | |
| 1248 | int |
| 1249 | device_get_children(device_t dev, device_t **devlistp, int *devcountp) |
| 1250 | { |
| 1251 | int count; |
| 1252 | device_t child; |
| 1253 | device_t *list; |
| 1254 | |
| 1255 | count = 0; |
| 1256 | TAILQ_FOREACH(child, &dev->children, link) |
| 1257 | count++; |
| 1258 | |
| 1259 | list = kmalloc(count * sizeof(device_t), M_TEMP, M_INTWAIT | M_ZERO); |
| 1260 | if (!list) |
| 1261 | return(ENOMEM); |
| 1262 | |
| 1263 | count = 0; |
| 1264 | TAILQ_FOREACH(child, &dev->children, link) { |
| 1265 | list[count] = child; |
| 1266 | count++; |
| 1267 | } |
| 1268 | |
| 1269 | *devlistp = list; |
| 1270 | *devcountp = count; |
| 1271 | |
| 1272 | return(0); |
| 1273 | } |
| 1274 | |
| 1275 | driver_t * |
| 1276 | device_get_driver(device_t dev) |
| 1277 | { |
| 1278 | return(dev->driver); |
| 1279 | } |
| 1280 | |
| 1281 | devclass_t |
| 1282 | device_get_devclass(device_t dev) |
| 1283 | { |
| 1284 | return(dev->devclass); |
| 1285 | } |
| 1286 | |
| 1287 | const char * |
| 1288 | device_get_name(device_t dev) |
| 1289 | { |
| 1290 | if (dev->devclass) |
| 1291 | return devclass_get_name(dev->devclass); |
| 1292 | return(NULL); |
| 1293 | } |
| 1294 | |
| 1295 | const char * |
| 1296 | device_get_nameunit(device_t dev) |
| 1297 | { |
| 1298 | return(dev->nameunit); |
| 1299 | } |
| 1300 | |
| 1301 | int |
| 1302 | device_get_unit(device_t dev) |
| 1303 | { |
| 1304 | return(dev->unit); |
| 1305 | } |
| 1306 | |
| 1307 | const char * |
| 1308 | device_get_desc(device_t dev) |
| 1309 | { |
| 1310 | return(dev->desc); |
| 1311 | } |
| 1312 | |
| 1313 | uint32_t |
| 1314 | device_get_flags(device_t dev) |
| 1315 | { |
| 1316 | return(dev->devflags); |
| 1317 | } |
| 1318 | |
| 1319 | int |
| 1320 | device_print_prettyname(device_t dev) |
| 1321 | { |
| 1322 | const char *name = device_get_name(dev); |
| 1323 | |
| 1324 | if (name == 0) |
| 1325 | return kprintf("unknown: "); |
| 1326 | else |
| 1327 | return kprintf("%s%d: ", name, device_get_unit(dev)); |
| 1328 | } |
| 1329 | |
| 1330 | int |
| 1331 | device_printf(device_t dev, const char * fmt, ...) |
| 1332 | { |
| 1333 | __va_list ap; |
| 1334 | int retval; |
| 1335 | |
| 1336 | retval = device_print_prettyname(dev); |
| 1337 | __va_start(ap, fmt); |
| 1338 | retval += kvprintf(fmt, ap); |
| 1339 | __va_end(ap); |
| 1340 | return retval; |
| 1341 | } |
| 1342 | |
| 1343 | static void |
| 1344 | device_set_desc_internal(device_t dev, const char* desc, int copy) |
| 1345 | { |
| 1346 | if (dev->desc && (dev->flags & DF_DESCMALLOCED)) { |
| 1347 | kfree(dev->desc, M_BUS); |
| 1348 | dev->flags &= ~DF_DESCMALLOCED; |
| 1349 | dev->desc = NULL; |
| 1350 | } |
| 1351 | |
| 1352 | if (copy && desc) { |
| 1353 | dev->desc = kmalloc(strlen(desc) + 1, M_BUS, M_INTWAIT); |
| 1354 | if (dev->desc) { |
| 1355 | strcpy(dev->desc, desc); |
| 1356 | dev->flags |= DF_DESCMALLOCED; |
| 1357 | } |
| 1358 | } else { |
| 1359 | /* Avoid a -Wcast-qual warning */ |
| 1360 | dev->desc = (char *)(uintptr_t) desc; |
| 1361 | } |
| 1362 | |
| 1363 | bus_data_generation_update(); |
| 1364 | } |
| 1365 | |
| 1366 | void |
| 1367 | device_set_desc(device_t dev, const char* desc) |
| 1368 | { |
| 1369 | device_set_desc_internal(dev, desc, FALSE); |
| 1370 | } |
| 1371 | |
| 1372 | void |
| 1373 | device_set_desc_copy(device_t dev, const char* desc) |
| 1374 | { |
| 1375 | device_set_desc_internal(dev, desc, TRUE); |
| 1376 | } |
| 1377 | |
| 1378 | void |
| 1379 | device_set_flags(device_t dev, uint32_t flags) |
| 1380 | { |
| 1381 | dev->devflags = flags; |
| 1382 | } |
| 1383 | |
| 1384 | void * |
| 1385 | device_get_softc(device_t dev) |
| 1386 | { |
| 1387 | return dev->softc; |
| 1388 | } |
| 1389 | |
| 1390 | void |
| 1391 | device_set_softc(device_t dev, void *softc) |
| 1392 | { |
| 1393 | if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) |
| 1394 | kfree(dev->softc, M_BUS); |
| 1395 | dev->softc = softc; |
| 1396 | if (dev->softc) |
| 1397 | dev->flags |= DF_EXTERNALSOFTC; |
| 1398 | else |
| 1399 | dev->flags &= ~DF_EXTERNALSOFTC; |
| 1400 | } |
| 1401 | |
| 1402 | void |
| 1403 | device_set_async_attach(device_t dev, int enable) |
| 1404 | { |
| 1405 | if (enable) |
| 1406 | dev->flags |= DF_ASYNCPROBE; |
| 1407 | else |
| 1408 | dev->flags &= ~DF_ASYNCPROBE; |
| 1409 | } |
| 1410 | |
| 1411 | void * |
| 1412 | device_get_ivars(device_t dev) |
| 1413 | { |
| 1414 | return dev->ivars; |
| 1415 | } |
| 1416 | |
| 1417 | void |
| 1418 | device_set_ivars(device_t dev, void * ivars) |
| 1419 | { |
| 1420 | if (!dev) |
| 1421 | return; |
| 1422 | |
| 1423 | dev->ivars = ivars; |
| 1424 | } |
| 1425 | |
| 1426 | device_state_t |
| 1427 | device_get_state(device_t dev) |
| 1428 | { |
| 1429 | return(dev->state); |
| 1430 | } |
| 1431 | |
| 1432 | void |
| 1433 | device_enable(device_t dev) |
| 1434 | { |
| 1435 | dev->flags |= DF_ENABLED; |
| 1436 | } |
| 1437 | |
| 1438 | void |
| 1439 | device_disable(device_t dev) |
| 1440 | { |
| 1441 | dev->flags &= ~DF_ENABLED; |
| 1442 | } |
| 1443 | |
| 1444 | /* |
| 1445 | * YYY cannot block |
| 1446 | */ |
| 1447 | void |
| 1448 | device_busy(device_t dev) |
| 1449 | { |
| 1450 | if (dev->state < DS_ATTACHED) |
| 1451 | panic("device_busy: called for unattached device"); |
| 1452 | if (dev->busy == 0 && dev->parent) |
| 1453 | device_busy(dev->parent); |
| 1454 | dev->busy++; |
| 1455 | dev->state = DS_BUSY; |
| 1456 | } |
| 1457 | |
| 1458 | /* |
| 1459 | * YYY cannot block |
| 1460 | */ |
| 1461 | void |
| 1462 | device_unbusy(device_t dev) |
| 1463 | { |
| 1464 | if (dev->state != DS_BUSY) |
| 1465 | panic("device_unbusy: called for non-busy device"); |
| 1466 | dev->busy--; |
| 1467 | if (dev->busy == 0) { |
| 1468 | if (dev->parent) |
| 1469 | device_unbusy(dev->parent); |
| 1470 | dev->state = DS_ATTACHED; |
| 1471 | } |
| 1472 | } |
| 1473 | |
| 1474 | void |
| 1475 | device_quiet(device_t dev) |
| 1476 | { |
| 1477 | dev->flags |= DF_QUIET; |
| 1478 | } |
| 1479 | |
| 1480 | void |
| 1481 | device_verbose(device_t dev) |
| 1482 | { |
| 1483 | dev->flags &= ~DF_QUIET; |
| 1484 | } |
| 1485 | |
| 1486 | int |
| 1487 | device_is_quiet(device_t dev) |
| 1488 | { |
| 1489 | return((dev->flags & DF_QUIET) != 0); |
| 1490 | } |
| 1491 | |
| 1492 | int |
| 1493 | device_is_enabled(device_t dev) |
| 1494 | { |
| 1495 | return((dev->flags & DF_ENABLED) != 0); |
| 1496 | } |
| 1497 | |
| 1498 | int |
| 1499 | device_is_alive(device_t dev) |
| 1500 | { |
| 1501 | return(dev->state >= DS_ALIVE); |
| 1502 | } |
| 1503 | |
| 1504 | int |
| 1505 | device_is_attached(device_t dev) |
| 1506 | { |
| 1507 | return(dev->state >= DS_ATTACHED); |
| 1508 | } |
| 1509 | |
| 1510 | int |
| 1511 | device_set_devclass(device_t dev, const char *classname) |
| 1512 | { |
| 1513 | devclass_t dc; |
| 1514 | int error; |
| 1515 | |
| 1516 | if (!classname) { |
| 1517 | if (dev->devclass) |
| 1518 | devclass_delete_device(dev->devclass, dev); |
| 1519 | return(0); |
| 1520 | } |
| 1521 | |
| 1522 | if (dev->devclass) { |
| 1523 | kprintf("device_set_devclass: device class already set\n"); |
| 1524 | return(EINVAL); |
| 1525 | } |
| 1526 | |
| 1527 | dc = devclass_find_internal(classname, NULL, TRUE); |
| 1528 | if (!dc) |
| 1529 | return(ENOMEM); |
| 1530 | |
| 1531 | error = devclass_add_device(dc, dev); |
| 1532 | |
| 1533 | bus_data_generation_update(); |
| 1534 | return(error); |
| 1535 | } |
| 1536 | |
| 1537 | int |
| 1538 | device_set_driver(device_t dev, driver_t *driver) |
| 1539 | { |
| 1540 | if (dev->state >= DS_ATTACHED) |
| 1541 | return(EBUSY); |
| 1542 | |
| 1543 | if (dev->driver == driver) |
| 1544 | return(0); |
| 1545 | |
| 1546 | if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) { |
| 1547 | kfree(dev->softc, M_BUS); |
| 1548 | dev->softc = NULL; |
| 1549 | } |
| 1550 | kobj_delete((kobj_t) dev, 0); |
| 1551 | dev->driver = driver; |
| 1552 | if (driver) { |
| 1553 | kobj_init((kobj_t) dev, (kobj_class_t) driver); |
| 1554 | if (!(dev->flags & DF_EXTERNALSOFTC)) { |
| 1555 | dev->softc = kmalloc(driver->size, M_BUS, |
| 1556 | M_INTWAIT | M_ZERO); |
| 1557 | if (!dev->softc) { |
| 1558 | kobj_delete((kobj_t)dev, 0); |
| 1559 | kobj_init((kobj_t) dev, &null_class); |
| 1560 | dev->driver = NULL; |
| 1561 | return(ENOMEM); |
| 1562 | } |
| 1563 | } |
| 1564 | } else { |
| 1565 | kobj_init((kobj_t) dev, &null_class); |
| 1566 | } |
| 1567 | |
| 1568 | bus_data_generation_update(); |
| 1569 | return(0); |
| 1570 | } |
| 1571 | |
| 1572 | int |
| 1573 | device_probe_and_attach(device_t dev) |
| 1574 | { |
| 1575 | device_t bus = dev->parent; |
| 1576 | int error = 0; |
| 1577 | |
| 1578 | if (dev->state >= DS_ALIVE) |
| 1579 | return(0); |
| 1580 | |
| 1581 | if ((dev->flags & DF_ENABLED) == 0) { |
| 1582 | if (bootverbose) { |
| 1583 | device_print_prettyname(dev); |
| 1584 | kprintf("not probed (disabled)\n"); |
| 1585 | } |
| 1586 | return(0); |
| 1587 | } |
| 1588 | |
| 1589 | error = device_probe_child(bus, dev); |
| 1590 | if (error) { |
| 1591 | if (!(dev->flags & DF_DONENOMATCH)) { |
| 1592 | BUS_PROBE_NOMATCH(bus, dev); |
| 1593 | devnomatch(dev); |
| 1594 | dev->flags |= DF_DONENOMATCH; |
| 1595 | } |
| 1596 | return(error); |
| 1597 | } |
| 1598 | |
| 1599 | /* |
| 1600 | * Output the exact device chain prior to the attach in case the |
| 1601 | * system locks up during attach, and generate the full info after |
| 1602 | * the attach so correct irq and other information is displayed. |
| 1603 | */ |
| 1604 | if (bootverbose && !device_is_quiet(dev)) { |
| 1605 | device_t tmp; |
| 1606 | |
| 1607 | kprintf("%s", device_get_nameunit(dev)); |
| 1608 | for (tmp = dev->parent; tmp; tmp = tmp->parent) |
| 1609 | kprintf(".%s", device_get_nameunit(tmp)); |
| 1610 | kprintf("\n"); |
| 1611 | } |
| 1612 | if (!device_is_quiet(dev)) |
| 1613 | device_print_child(bus, dev); |
| 1614 | if ((dev->flags & DF_ASYNCPROBE) && do_async_attach) { |
| 1615 | kprintf("%s: probing asynchronously\n", |
| 1616 | device_get_nameunit(dev)); |
| 1617 | dev->state = DS_INPROGRESS; |
| 1618 | device_attach_async(dev); |
| 1619 | error = 0; |
| 1620 | } else { |
| 1621 | error = device_doattach(dev); |
| 1622 | } |
| 1623 | return(error); |
| 1624 | } |
| 1625 | |
| 1626 | /* |
| 1627 | * Device is known to be alive, do the attach asynchronously. |
| 1628 | * |
| 1629 | * The MP lock is held by all threads. |
| 1630 | */ |
| 1631 | static void |
| 1632 | device_attach_async(device_t dev) |
| 1633 | { |
| 1634 | thread_t td; |
| 1635 | |
| 1636 | atomic_add_int(&numasyncthreads, 1); |
| 1637 | lwkt_create(device_attach_thread, dev, &td, NULL, |
| 1638 | 0, 0, (dev->desc ? dev->desc : "devattach")); |
| 1639 | } |
| 1640 | |
| 1641 | static void |
| 1642 | device_attach_thread(void *arg) |
| 1643 | { |
| 1644 | device_t dev = arg; |
| 1645 | |
| 1646 | (void)device_doattach(dev); |
| 1647 | atomic_subtract_int(&numasyncthreads, 1); |
| 1648 | wakeup(&numasyncthreads); |
| 1649 | } |
| 1650 | |
| 1651 | /* |
| 1652 | * Device is known to be alive, do the attach (synchronous or asynchronous) |
| 1653 | */ |
| 1654 | static int |
| 1655 | device_doattach(device_t dev) |
| 1656 | { |
| 1657 | device_t bus = dev->parent; |
| 1658 | int hasclass = (dev->devclass != 0); |
| 1659 | int error; |
| 1660 | |
| 1661 | error = DEVICE_ATTACH(dev); |
| 1662 | if (error == 0) { |
| 1663 | dev->state = DS_ATTACHED; |
| 1664 | if (bootverbose && !device_is_quiet(dev)) |
| 1665 | device_print_child(bus, dev); |
| 1666 | devadded(dev); |
| 1667 | } else { |
| 1668 | kprintf("device_probe_and_attach: %s%d attach returned %d\n", |
| 1669 | dev->driver->name, dev->unit, error); |
| 1670 | /* Unset the class that was set in device_probe_child */ |
| 1671 | if (!hasclass) |
| 1672 | device_set_devclass(dev, 0); |
| 1673 | device_set_driver(dev, NULL); |
| 1674 | dev->state = DS_NOTPRESENT; |
| 1675 | } |
| 1676 | return(error); |
| 1677 | } |
| 1678 | |
| 1679 | int |
| 1680 | device_detach(device_t dev) |
| 1681 | { |
| 1682 | int error; |
| 1683 | |
| 1684 | PDEBUG(("%s", DEVICENAME(dev))); |
| 1685 | if (dev->state == DS_BUSY) |
| 1686 | return(EBUSY); |
| 1687 | if (dev->state != DS_ATTACHED) |
| 1688 | return(0); |
| 1689 | |
| 1690 | if ((error = DEVICE_DETACH(dev)) != 0) |
| 1691 | return(error); |
| 1692 | devremoved(dev); |
| 1693 | device_printf(dev, "detached\n"); |
| 1694 | if (dev->parent) |
| 1695 | BUS_CHILD_DETACHED(dev->parent, dev); |
| 1696 | |
| 1697 | if (!(dev->flags & DF_FIXEDCLASS)) |
| 1698 | devclass_delete_device(dev->devclass, dev); |
| 1699 | |
| 1700 | dev->state = DS_NOTPRESENT; |
| 1701 | device_set_driver(dev, NULL); |
| 1702 | |
| 1703 | return(0); |
| 1704 | } |
| 1705 | |
| 1706 | int |
| 1707 | device_shutdown(device_t dev) |
| 1708 | { |
| 1709 | if (dev->state < DS_ATTACHED) |
| 1710 | return 0; |
| 1711 | PDEBUG(("%s", DEVICENAME(dev))); |
| 1712 | return DEVICE_SHUTDOWN(dev); |
| 1713 | } |
| 1714 | |
| 1715 | int |
| 1716 | device_set_unit(device_t dev, int unit) |
| 1717 | { |
| 1718 | devclass_t dc; |
| 1719 | int err; |
| 1720 | |
| 1721 | dc = device_get_devclass(dev); |
| 1722 | if (unit < dc->maxunit && dc->devices[unit]) |
| 1723 | return(EBUSY); |
| 1724 | err = devclass_delete_device(dc, dev); |
| 1725 | if (err) |
| 1726 | return(err); |
| 1727 | dev->unit = unit; |
| 1728 | err = devclass_add_device(dc, dev); |
| 1729 | if (err) |
| 1730 | return(err); |
| 1731 | |
| 1732 | bus_data_generation_update(); |
| 1733 | return(0); |
| 1734 | } |
| 1735 | |
| 1736 | /*======================================*/ |
| 1737 | /* |
| 1738 | * Access functions for device resources. |
| 1739 | */ |
| 1740 | |
| 1741 | /* Supplied by config(8) in ioconf.c */ |
| 1742 | extern struct config_device config_devtab[]; |
| 1743 | extern int devtab_count; |
| 1744 | |
| 1745 | /* Runtime version */ |
| 1746 | struct config_device *devtab = config_devtab; |
| 1747 | |
| 1748 | static int |
| 1749 | resource_new_name(const char *name, int unit) |
| 1750 | { |
| 1751 | struct config_device *new; |
| 1752 | |
| 1753 | new = kmalloc((devtab_count + 1) * sizeof(*new), M_TEMP, |
| 1754 | M_INTWAIT | M_ZERO); |
| 1755 | if (new == NULL) |
| 1756 | return(-1); |
| 1757 | if (devtab && devtab_count > 0) |
| 1758 | bcopy(devtab, new, devtab_count * sizeof(*new)); |
| 1759 | new[devtab_count].name = kmalloc(strlen(name) + 1, M_TEMP, M_INTWAIT); |
| 1760 | if (new[devtab_count].name == NULL) { |
| 1761 | kfree(new, M_TEMP); |
| 1762 | return(-1); |
| 1763 | } |
| 1764 | strcpy(new[devtab_count].name, name); |
| 1765 | new[devtab_count].unit = unit; |
| 1766 | new[devtab_count].resource_count = 0; |
| 1767 | new[devtab_count].resources = NULL; |
| 1768 | if (devtab && devtab != config_devtab) |
| 1769 | kfree(devtab, M_TEMP); |
| 1770 | devtab = new; |
| 1771 | return devtab_count++; |
| 1772 | } |
| 1773 | |
| 1774 | static int |
| 1775 | resource_new_resname(int j, const char *resname, resource_type type) |
| 1776 | { |
| 1777 | struct config_resource *new; |
| 1778 | int i; |
| 1779 | |
| 1780 | i = devtab[j].resource_count; |
| 1781 | new = kmalloc((i + 1) * sizeof(*new), M_TEMP, M_INTWAIT | M_ZERO); |
| 1782 | if (new == NULL) |
| 1783 | return(-1); |
| 1784 | if (devtab[j].resources && i > 0) |
| 1785 | bcopy(devtab[j].resources, new, i * sizeof(*new)); |
| 1786 | new[i].name = kmalloc(strlen(resname) + 1, M_TEMP, M_INTWAIT); |
| 1787 | if (new[i].name == NULL) { |
| 1788 | kfree(new, M_TEMP); |
| 1789 | return(-1); |
| 1790 | } |
| 1791 | strcpy(new[i].name, resname); |
| 1792 | new[i].type = type; |
| 1793 | if (devtab[j].resources) |
| 1794 | kfree(devtab[j].resources, M_TEMP); |
| 1795 | devtab[j].resources = new; |
| 1796 | devtab[j].resource_count = i + 1; |
| 1797 | return(i); |
| 1798 | } |
| 1799 | |
| 1800 | static int |
| 1801 | resource_match_string(int i, const char *resname, const char *value) |
| 1802 | { |
| 1803 | int j; |
| 1804 | struct config_resource *res; |
| 1805 | |
| 1806 | for (j = 0, res = devtab[i].resources; |
| 1807 | j < devtab[i].resource_count; j++, res++) |
| 1808 | if (!strcmp(res->name, resname) |
| 1809 | && res->type == RES_STRING |
| 1810 | && !strcmp(res->u.stringval, value)) |
| 1811 | return(j); |
| 1812 | return(-1); |
| 1813 | } |
| 1814 | |
| 1815 | static int |
| 1816 | resource_find(const char *name, int unit, const char *resname, |
| 1817 | struct config_resource **result) |
| 1818 | { |
| 1819 | int i, j; |
| 1820 | struct config_resource *res; |
| 1821 | |
| 1822 | /* |
| 1823 | * First check specific instances, then generic. |
| 1824 | */ |
| 1825 | for (i = 0; i < devtab_count; i++) { |
| 1826 | if (devtab[i].unit < 0) |
| 1827 | continue; |
| 1828 | if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { |
| 1829 | res = devtab[i].resources; |
| 1830 | for (j = 0; j < devtab[i].resource_count; j++, res++) |
| 1831 | if (!strcmp(res->name, resname)) { |
| 1832 | *result = res; |
| 1833 | return(0); |
| 1834 | } |
| 1835 | } |
| 1836 | } |
| 1837 | for (i = 0; i < devtab_count; i++) { |
| 1838 | if (devtab[i].unit >= 0) |
| 1839 | continue; |
| 1840 | /* XXX should this `&& devtab[i].unit == unit' be here? */ |
| 1841 | /* XXX if so, then the generic match does nothing */ |
| 1842 | if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { |
| 1843 | res = devtab[i].resources; |
| 1844 | for (j = 0; j < devtab[i].resource_count; j++, res++) |
| 1845 | if (!strcmp(res->name, resname)) { |
| 1846 | *result = res; |
| 1847 | return(0); |
| 1848 | } |
| 1849 | } |
| 1850 | } |
| 1851 | return(ENOENT); |
| 1852 | } |
| 1853 | |
| 1854 | int |
| 1855 | resource_int_value(const char *name, int unit, const char *resname, int *result) |
| 1856 | { |
| 1857 | int error; |
| 1858 | struct config_resource *res; |
| 1859 | |
| 1860 | if ((error = resource_find(name, unit, resname, &res)) != 0) |
| 1861 | return(error); |
| 1862 | if (res->type != RES_INT) |
| 1863 | return(EFTYPE); |
| 1864 | *result = res->u.intval; |
| 1865 | return(0); |
| 1866 | } |
| 1867 | |
| 1868 | int |
| 1869 | resource_long_value(const char *name, int unit, const char *resname, |
| 1870 | long *result) |
| 1871 | { |
| 1872 | int error; |
| 1873 | struct config_resource *res; |
| 1874 | |
| 1875 | if ((error = resource_find(name, unit, resname, &res)) != 0) |
| 1876 | return(error); |
| 1877 | if (res->type != RES_LONG) |
| 1878 | return(EFTYPE); |
| 1879 | *result = res->u.longval; |
| 1880 | return(0); |
| 1881 | } |
| 1882 | |
| 1883 | int |
| 1884 | resource_string_value(const char *name, int unit, const char *resname, |
| 1885 | char **result) |
| 1886 | { |
| 1887 | int error; |
| 1888 | struct config_resource *res; |
| 1889 | |
| 1890 | if ((error = resource_find(name, unit, resname, &res)) != 0) |
| 1891 | return(error); |
| 1892 | if (res->type != RES_STRING) |
| 1893 | return(EFTYPE); |
| 1894 | *result = res->u.stringval; |
| 1895 | return(0); |
| 1896 | } |
| 1897 | |
| 1898 | int |
| 1899 | resource_query_string(int i, const char *resname, const char *value) |
| 1900 | { |
| 1901 | if (i < 0) |
| 1902 | i = 0; |
| 1903 | else |
| 1904 | i = i + 1; |
| 1905 | for (; i < devtab_count; i++) |
| 1906 | if (resource_match_string(i, resname, value) >= 0) |
| 1907 | return(i); |
| 1908 | return(-1); |
| 1909 | } |
| 1910 | |
| 1911 | int |
| 1912 | resource_locate(int i, const char *resname) |
| 1913 | { |
| 1914 | if (i < 0) |
| 1915 | i = 0; |
| 1916 | else |
| 1917 | i = i + 1; |
| 1918 | for (; i < devtab_count; i++) |
| 1919 | if (!strcmp(devtab[i].name, resname)) |
| 1920 | return(i); |
| 1921 | return(-1); |
| 1922 | } |
| 1923 | |
| 1924 | int |
| 1925 | resource_count(void) |
| 1926 | { |
| 1927 | return(devtab_count); |
| 1928 | } |
| 1929 | |
| 1930 | char * |
| 1931 | resource_query_name(int i) |
| 1932 | { |
| 1933 | return(devtab[i].name); |
| 1934 | } |
| 1935 | |
| 1936 | int |
| 1937 | resource_query_unit(int i) |
| 1938 | { |
| 1939 | return(devtab[i].unit); |
| 1940 | } |
| 1941 | |
| 1942 | static int |
| 1943 | resource_create(const char *name, int unit, const char *resname, |
| 1944 | resource_type type, struct config_resource **result) |
| 1945 | { |
| 1946 | int i, j; |
| 1947 | struct config_resource *res = NULL; |
| 1948 | |
| 1949 | for (i = 0; i < devtab_count; i++) |
| 1950 | if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) { |
| 1951 | res = devtab[i].resources; |
| 1952 | break; |
| 1953 | } |
| 1954 | if (res == NULL) { |
| 1955 | i = resource_new_name(name, unit); |
| 1956 | if (i < 0) |
| 1957 | return(ENOMEM); |
| 1958 | res = devtab[i].resources; |
| 1959 | } |
| 1960 | for (j = 0; j < devtab[i].resource_count; j++, res++) |
| 1961 | if (!strcmp(res->name, resname)) { |
| 1962 | *result = res; |
| 1963 | return(0); |
| 1964 | } |
| 1965 | j = resource_new_resname(i, resname, type); |
| 1966 | if (j < 0) |
| 1967 | return(ENOMEM); |
| 1968 | res = &devtab[i].resources[j]; |
| 1969 | *result = res; |
| 1970 | return(0); |
| 1971 | } |
| 1972 | |
| 1973 | int |
| 1974 | resource_set_int(const char *name, int unit, const char *resname, int value) |
| 1975 | { |
| 1976 | int error; |
| 1977 | struct config_resource *res; |
| 1978 | |
| 1979 | error = resource_create(name, unit, resname, RES_INT, &res); |
| 1980 | if (error) |
| 1981 | return(error); |
| 1982 | if (res->type != RES_INT) |
| 1983 | return(EFTYPE); |
| 1984 | res->u.intval = value; |
| 1985 | return(0); |
| 1986 | } |
| 1987 | |
| 1988 | int |
| 1989 | resource_set_long(const char *name, int unit, const char *resname, long value) |
| 1990 | { |
| 1991 | int error; |
| 1992 | struct config_resource *res; |
| 1993 | |
| 1994 | error = resource_create(name, unit, resname, RES_LONG, &res); |
| 1995 | if (error) |
| 1996 | return(error); |
| 1997 | if (res->type != RES_LONG) |
| 1998 | return(EFTYPE); |
| 1999 | res->u.longval = value; |
| 2000 | return(0); |
| 2001 | } |
| 2002 | |
| 2003 | int |
| 2004 | resource_set_string(const char *name, int unit, const char *resname, |
| 2005 | const char *value) |
| 2006 | { |
| 2007 | int error; |
| 2008 | struct config_resource *res; |
| 2009 | |
| 2010 | error = resource_create(name, unit, resname, RES_STRING, &res); |
| 2011 | if (error) |
| 2012 | return(error); |
| 2013 | if (res->type != RES_STRING) |
| 2014 | return(EFTYPE); |
| 2015 | if (res->u.stringval) |
| 2016 | kfree(res->u.stringval, M_TEMP); |
| 2017 | res->u.stringval = kmalloc(strlen(value) + 1, M_TEMP, M_INTWAIT); |
| 2018 | if (res->u.stringval == NULL) |
| 2019 | return(ENOMEM); |
| 2020 | strcpy(res->u.stringval, value); |
| 2021 | return(0); |
| 2022 | } |
| 2023 | |
| 2024 | static void |
| 2025 | resource_cfgload(void *dummy __unused) |
| 2026 | { |
| 2027 | struct config_resource *res, *cfgres; |
| 2028 | int i, j; |
| 2029 | int error; |
| 2030 | char *name, *resname; |
| 2031 | int unit; |
| 2032 | resource_type type; |
| 2033 | char *stringval; |
| 2034 | int config_devtab_count; |
| 2035 | |
| 2036 | config_devtab_count = devtab_count; |
| 2037 | devtab = NULL; |
| 2038 | devtab_count = 0; |
| 2039 | |
| 2040 | for (i = 0; i < config_devtab_count; i++) { |
| 2041 | name = config_devtab[i].name; |
| 2042 | unit = config_devtab[i].unit; |
| 2043 | |
| 2044 | for (j = 0; j < config_devtab[i].resource_count; j++) { |
| 2045 | cfgres = config_devtab[i].resources; |
| 2046 | resname = cfgres[j].name; |
| 2047 | type = cfgres[j].type; |
| 2048 | error = resource_create(name, unit, resname, type, |
| 2049 | &res); |
| 2050 | if (error) { |
| 2051 | kprintf("create resource %s%d: error %d\n", |
| 2052 | name, unit, error); |
| 2053 | continue; |
| 2054 | } |
| 2055 | if (res->type != type) { |
| 2056 | kprintf("type mismatch %s%d: %d != %d\n", |
| 2057 | name, unit, res->type, type); |
| 2058 | continue; |
| 2059 | } |
| 2060 | switch (type) { |
| 2061 | case RES_INT: |
| 2062 | res->u.intval = cfgres[j].u.intval; |
| 2063 | break; |
| 2064 | case RES_LONG: |
| 2065 | res->u.longval = cfgres[j].u.longval; |
| 2066 | break; |
| 2067 | case RES_STRING: |
| 2068 | if (res->u.stringval) |
| 2069 | kfree(res->u.stringval, M_TEMP); |
| 2070 | stringval = cfgres[j].u.stringval; |
| 2071 | res->u.stringval = kmalloc(strlen(stringval) + 1, |
| 2072 | M_TEMP, M_INTWAIT); |
| 2073 | if (res->u.stringval == NULL) |
| 2074 | break; |
| 2075 | strcpy(res->u.stringval, stringval); |
| 2076 | break; |
| 2077 | default: |
| 2078 | panic("unknown resource type %d", type); |
| 2079 | } |
| 2080 | } |
| 2081 | } |
| 2082 | } |
| 2083 | SYSINIT(cfgload, SI_BOOT1_POST, SI_ORDER_ANY + 50, resource_cfgload, 0) |
| 2084 | |
| 2085 | |
| 2086 | /*======================================*/ |
| 2087 | /* |
| 2088 | * Some useful method implementations to make life easier for bus drivers. |
| 2089 | */ |
| 2090 | |
| 2091 | void |
| 2092 | resource_list_init(struct resource_list *rl) |
| 2093 | { |
| 2094 | SLIST_INIT(rl); |
| 2095 | } |
| 2096 | |
| 2097 | void |
| 2098 | resource_list_free(struct resource_list *rl) |
| 2099 | { |
| 2100 | struct resource_list_entry *rle; |
| 2101 | |
| 2102 | while ((rle = SLIST_FIRST(rl)) != NULL) { |
| 2103 | if (rle->res) |
| 2104 | panic("resource_list_free: resource entry is busy"); |
| 2105 | SLIST_REMOVE_HEAD(rl, link); |
| 2106 | kfree(rle, M_BUS); |
| 2107 | } |
| 2108 | } |
| 2109 | |
| 2110 | void |
| 2111 | resource_list_add(struct resource_list *rl, |
| 2112 | int type, int rid, |
| 2113 | u_long start, u_long end, u_long count) |
| 2114 | { |
| 2115 | struct resource_list_entry *rle; |
| 2116 | |
| 2117 | rle = resource_list_find(rl, type, rid); |
| 2118 | if (rle == NULL) { |
| 2119 | rle = kmalloc(sizeof(struct resource_list_entry), M_BUS, |
| 2120 | M_INTWAIT); |
| 2121 | if (!rle) |
| 2122 | panic("resource_list_add: can't record entry"); |
| 2123 | SLIST_INSERT_HEAD(rl, rle, link); |
| 2124 | rle->type = type; |
| 2125 | rle->rid = rid; |
| 2126 | rle->res = NULL; |
| 2127 | } |
| 2128 | |
| 2129 | if (rle->res) |
| 2130 | panic("resource_list_add: resource entry is busy"); |
| 2131 | |
| 2132 | rle->start = start; |
| 2133 | rle->end = end; |
| 2134 | rle->count = count; |
| 2135 | } |
| 2136 | |
| 2137 | struct resource_list_entry* |
| 2138 | resource_list_find(struct resource_list *rl, |
| 2139 | int type, int rid) |
| 2140 | { |
| 2141 | struct resource_list_entry *rle; |
| 2142 | |
| 2143 | SLIST_FOREACH(rle, rl, link) |
| 2144 | if (rle->type == type && rle->rid == rid) |
| 2145 | return(rle); |
| 2146 | return(NULL); |
| 2147 | } |
| 2148 | |
| 2149 | void |
| 2150 | resource_list_delete(struct resource_list *rl, |
| 2151 | int type, int rid) |
| 2152 | { |
| 2153 | struct resource_list_entry *rle = resource_list_find(rl, type, rid); |
| 2154 | |
| 2155 | if (rle) { |
| 2156 | if (rle->res != NULL) |
| 2157 | panic("resource_list_delete: resource has not been released"); |
| 2158 | SLIST_REMOVE(rl, rle, resource_list_entry, link); |
| 2159 | kfree(rle, M_BUS); |
| 2160 | } |
| 2161 | } |
| 2162 | |
| 2163 | struct resource * |
| 2164 | resource_list_alloc(struct resource_list *rl, |
| 2165 | device_t bus, device_t child, |
| 2166 | int type, int *rid, |
| 2167 | u_long start, u_long end, |
| 2168 | u_long count, u_int flags) |
| 2169 | { |
| 2170 | struct resource_list_entry *rle = 0; |
| 2171 | int passthrough = (device_get_parent(child) != bus); |
| 2172 | int isdefault = (start == 0UL && end == ~0UL); |
| 2173 | |
| 2174 | if (passthrough) { |
| 2175 | return(BUS_ALLOC_RESOURCE(device_get_parent(bus), child, |
| 2176 | type, rid, |
| 2177 | start, end, count, flags)); |
| 2178 | } |
| 2179 | |
| 2180 | rle = resource_list_find(rl, type, *rid); |
| 2181 | |
| 2182 | if (!rle) |
| 2183 | return(0); /* no resource of that type/rid */ |
| 2184 | |
| 2185 | if (rle->res) |
| 2186 | panic("resource_list_alloc: resource entry is busy"); |
| 2187 | |
| 2188 | if (isdefault) { |
| 2189 | start = rle->start; |
| 2190 | count = max(count, rle->count); |
| 2191 | end = max(rle->end, start + count - 1); |
| 2192 | } |
| 2193 | |
| 2194 | rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, |
| 2195 | type, rid, start, end, count, flags); |
| 2196 | |
| 2197 | /* |
| 2198 | * Record the new range. |
| 2199 | */ |
| 2200 | if (rle->res) { |
| 2201 | rle->start = rman_get_start(rle->res); |
| 2202 | rle->end = rman_get_end(rle->res); |
| 2203 | rle->count = count; |
| 2204 | } |
| 2205 | |
| 2206 | return(rle->res); |
| 2207 | } |
| 2208 | |
| 2209 | int |
| 2210 | resource_list_release(struct resource_list *rl, |
| 2211 | device_t bus, device_t child, |
| 2212 | int type, int rid, struct resource *res) |
| 2213 | { |
| 2214 | struct resource_list_entry *rle = 0; |
| 2215 | int passthrough = (device_get_parent(child) != bus); |
| 2216 | int error; |
| 2217 | |
| 2218 | if (passthrough) { |
| 2219 | return(BUS_RELEASE_RESOURCE(device_get_parent(bus), child, |
| 2220 | type, rid, res)); |
| 2221 | } |
| 2222 | |
| 2223 | rle = resource_list_find(rl, type, rid); |
| 2224 | |
| 2225 | if (!rle) |
| 2226 | panic("resource_list_release: can't find resource"); |
| 2227 | if (!rle->res) |
| 2228 | panic("resource_list_release: resource entry is not busy"); |
| 2229 | |
| 2230 | error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, |
| 2231 | type, rid, res); |
| 2232 | if (error) |
| 2233 | return(error); |
| 2234 | |
| 2235 | rle->res = NULL; |
| 2236 | return(0); |
| 2237 | } |
| 2238 | |
| 2239 | int |
| 2240 | resource_list_print_type(struct resource_list *rl, const char *name, int type, |
| 2241 | const char *format) |
| 2242 | { |
| 2243 | struct resource_list_entry *rle; |
| 2244 | int printed, retval; |
| 2245 | |
| 2246 | printed = 0; |
| 2247 | retval = 0; |
| 2248 | /* Yes, this is kinda cheating */ |
| 2249 | SLIST_FOREACH(rle, rl, link) { |
| 2250 | if (rle->type == type) { |
| 2251 | if (printed == 0) |
| 2252 | retval += kprintf(" %s ", name); |
| 2253 | else |
| 2254 | retval += kprintf(","); |
| 2255 | printed++; |
| 2256 | retval += kprintf(format, rle->start); |
| 2257 | if (rle->count > 1) { |
| 2258 | retval += kprintf("-"); |
| 2259 | retval += kprintf(format, rle->start + |
| 2260 | rle->count - 1); |
| 2261 | } |
| 2262 | } |
| 2263 | } |
| 2264 | return(retval); |
| 2265 | } |
| 2266 | |
| 2267 | /* |
| 2268 | * Generic driver/device identify functions. These will install a device |
| 2269 | * rendezvous point under the parent using the same name as the driver |
| 2270 | * name, which will at a later time be probed and attached. |
| 2271 | * |
| 2272 | * These functions are used when the parent does not 'scan' its bus for |
| 2273 | * matching devices, or for the particular devices using these functions, |
| 2274 | * or when the device is a pseudo or synthesized device (such as can be |
| 2275 | * found under firewire and ppbus). |
| 2276 | */ |
| 2277 | int |
| 2278 | bus_generic_identify(driver_t *driver, device_t parent) |
| 2279 | { |
| 2280 | if (parent->state == DS_ATTACHED) |
| 2281 | return (0); |
| 2282 | BUS_ADD_CHILD(parent, parent, 0, driver->name, -1); |
| 2283 | return (0); |
| 2284 | } |
| 2285 | |
| 2286 | int |
| 2287 | bus_generic_identify_sameunit(driver_t *driver, device_t parent) |
| 2288 | { |
| 2289 | if (parent->state == DS_ATTACHED) |
| 2290 | return (0); |
| 2291 | BUS_ADD_CHILD(parent, parent, 0, driver->name, device_get_unit(parent)); |
| 2292 | return (0); |
| 2293 | } |
| 2294 | |
| 2295 | /* |
| 2296 | * Call DEVICE_IDENTIFY for each driver. |
| 2297 | */ |
| 2298 | int |
| 2299 | bus_generic_probe(device_t dev) |
| 2300 | { |
| 2301 | devclass_t dc = dev->devclass; |
| 2302 | driverlink_t dl; |
| 2303 | |
| 2304 | TAILQ_FOREACH(dl, &dc->drivers, link) { |
| 2305 | DEVICE_IDENTIFY(dl->driver, dev); |
| 2306 | } |
| 2307 | |
| 2308 | return(0); |
| 2309 | } |
| 2310 | |
| 2311 | /* |
| 2312 | * This is an aweful hack due to the isa bus and autoconf code not |
| 2313 | * probing the ISA devices until after everything else has configured. |
| 2314 | * The ISA bus did a dummy attach long ago so we have to set it back |
| 2315 | * to an earlier state so the probe thinks its the initial probe and |
| 2316 | * not a bus rescan. |
| 2317 | * |
| 2318 | * XXX remove by properly defering the ISA bus scan. |
| 2319 | */ |
| 2320 | int |
| 2321 | bus_generic_probe_hack(device_t dev) |
| 2322 | { |
| 2323 | if (dev->state == DS_ATTACHED) { |
| 2324 | dev->state = DS_ALIVE; |
| 2325 | bus_generic_probe(dev); |
| 2326 | dev->state = DS_ATTACHED; |
| 2327 | } |
| 2328 | return (0); |
| 2329 | } |
| 2330 | |
| 2331 | int |
| 2332 | bus_generic_attach(device_t dev) |
| 2333 | { |
| 2334 | device_t child; |
| 2335 | |
| 2336 | TAILQ_FOREACH(child, &dev->children, link) { |
| 2337 | device_probe_and_attach(child); |
| 2338 | } |
| 2339 | |
| 2340 | return(0); |
| 2341 | } |
| 2342 | |
| 2343 | int |
| 2344 | bus_generic_detach(device_t dev) |
| 2345 | { |
| 2346 | device_t child; |
| 2347 | int error; |
| 2348 | |
| 2349 | if (dev->state != DS_ATTACHED) |
| 2350 | return(EBUSY); |
| 2351 | |
| 2352 | TAILQ_FOREACH(child, &dev->children, link) |
| 2353 | if ((error = device_detach(child)) != 0) |
| 2354 | return(error); |
| 2355 | |
| 2356 | return 0; |
| 2357 | } |
| 2358 | |
| 2359 | int |
| 2360 | bus_generic_shutdown(device_t dev) |
| 2361 | { |
| 2362 | device_t child; |
| 2363 | |
| 2364 | TAILQ_FOREACH(child, &dev->children, link) |
| 2365 | device_shutdown(child); |
| 2366 | |
| 2367 | return(0); |
| 2368 | } |
| 2369 | |
| 2370 | int |
| 2371 | bus_generic_suspend(device_t dev) |
| 2372 | { |
| 2373 | int error; |
| 2374 | device_t child, child2; |
| 2375 | |
| 2376 | TAILQ_FOREACH(child, &dev->children, link) { |
| 2377 | error = DEVICE_SUSPEND(child); |
| 2378 | if (error) { |
| 2379 | for (child2 = TAILQ_FIRST(&dev->children); |
| 2380 | child2 && child2 != child; |
| 2381 | child2 = TAILQ_NEXT(child2, link)) |
| 2382 | DEVICE_RESUME(child2); |
| 2383 | return(error); |
| 2384 | } |
| 2385 | } |
| 2386 | return(0); |
| 2387 | } |
| 2388 | |
| 2389 | int |
| 2390 | bus_generic_resume(device_t dev) |
| 2391 | { |
| 2392 | device_t child; |
| 2393 | |
| 2394 | TAILQ_FOREACH(child, &dev->children, link) |
| 2395 | DEVICE_RESUME(child); |
| 2396 | /* if resume fails, there's nothing we can usefully do... */ |
| 2397 | |
| 2398 | return(0); |
| 2399 | } |
| 2400 | |
| 2401 | int |
| 2402 | bus_print_child_header(device_t dev, device_t child) |
| 2403 | { |
| 2404 | int retval = 0; |
| 2405 | |
| 2406 | if (device_get_desc(child)) |
| 2407 | retval += device_printf(child, "<%s>", device_get_desc(child)); |
| 2408 | else |
| 2409 | retval += kprintf("%s", device_get_nameunit(child)); |
| 2410 | if (bootverbose) { |
| 2411 | if (child->state != DS_ATTACHED) |
| 2412 | kprintf(" [tentative]"); |
| 2413 | else |
| 2414 | kprintf(" [attached!]"); |
| 2415 | } |
| 2416 | return(retval); |
| 2417 | } |
| 2418 | |
| 2419 | int |
| 2420 | bus_print_child_footer(device_t dev, device_t child) |
| 2421 | { |
| 2422 | return(kprintf(" on %s\n", device_get_nameunit(dev))); |
| 2423 | } |
| 2424 | |
| 2425 | device_t |
| 2426 | bus_generic_add_child(device_t dev, device_t child, int order, |
| 2427 | const char *name, int unit) |
| 2428 | { |
| 2429 | if (dev->parent) |
| 2430 | dev = BUS_ADD_CHILD(dev->parent, child, order, name, unit); |
| 2431 | else |
| 2432 | dev = device_add_child_ordered(child, order, name, unit); |
| 2433 | return(dev); |
| 2434 | |
| 2435 | } |
| 2436 | |
| 2437 | int |
| 2438 | bus_generic_print_child(device_t dev, device_t child) |
| 2439 | { |
| 2440 | int retval = 0; |
| 2441 | |
| 2442 | retval += bus_print_child_header(dev, child); |
| 2443 | retval += bus_print_child_footer(dev, child); |
| 2444 | |
| 2445 | return(retval); |
| 2446 | } |
| 2447 | |
| 2448 | int |
| 2449 | bus_generic_read_ivar(device_t dev, device_t child, int index, |
| 2450 | uintptr_t * result) |
| 2451 | { |
| 2452 | int error; |
| 2453 | |
| 2454 | if (dev->parent) |
| 2455 | error = BUS_READ_IVAR(dev->parent, child, index, result); |
| 2456 | else |
| 2457 | error = ENOENT; |
| 2458 | return (error); |
| 2459 | } |
| 2460 | |
| 2461 | int |
| 2462 | bus_generic_write_ivar(device_t dev, device_t child, int index, |
| 2463 | uintptr_t value) |
| 2464 | { |
| 2465 | int error; |
| 2466 | |
| 2467 | if (dev->parent) |
| 2468 | error = BUS_WRITE_IVAR(dev->parent, child, index, value); |
| 2469 | else |
| 2470 | error = ENOENT; |
| 2471 | return (error); |
| 2472 | } |
| 2473 | |
| 2474 | /* |
| 2475 | * Resource list are used for iterations, do not recurse. |
| 2476 | */ |
| 2477 | struct resource_list * |
| 2478 | bus_generic_get_resource_list(device_t dev, device_t child) |
| 2479 | { |
| 2480 | return (NULL); |
| 2481 | } |
| 2482 | |
| 2483 | void |
| 2484 | bus_generic_driver_added(device_t dev, driver_t *driver) |
| 2485 | { |
| 2486 | device_t child; |
| 2487 | |
| 2488 | DEVICE_IDENTIFY(driver, dev); |
| 2489 | TAILQ_FOREACH(child, &dev->children, link) { |
| 2490 | if (child->state == DS_NOTPRESENT) |
| 2491 | device_probe_and_attach(child); |
| 2492 | } |
| 2493 | } |
| 2494 | |
| 2495 | int |
| 2496 | bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq, |
| 2497 | int flags, driver_intr_t *intr, void *arg, |
| 2498 | void **cookiep, lwkt_serialize_t serializer) |
| 2499 | { |
| 2500 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2501 | if (dev->parent) |
| 2502 | return(BUS_SETUP_INTR(dev->parent, child, irq, flags, |
| 2503 | intr, arg, cookiep, serializer)); |
| 2504 | else |
| 2505 | return(EINVAL); |
| 2506 | } |
| 2507 | |
| 2508 | int |
| 2509 | bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq, |
| 2510 | void *cookie) |
| 2511 | { |
| 2512 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2513 | if (dev->parent) |
| 2514 | return(BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie)); |
| 2515 | else |
| 2516 | return(EINVAL); |
| 2517 | } |
| 2518 | |
| 2519 | int |
| 2520 | bus_generic_disable_intr(device_t dev, device_t child, void *cookie) |
| 2521 | { |
| 2522 | if (dev->parent) |
| 2523 | return(BUS_DISABLE_INTR(dev->parent, child, cookie)); |
| 2524 | else |
| 2525 | return(0); |
| 2526 | } |
| 2527 | |
| 2528 | void |
| 2529 | bus_generic_enable_intr(device_t dev, device_t child, void *cookie) |
| 2530 | { |
| 2531 | if (dev->parent) |
| 2532 | BUS_ENABLE_INTR(dev->parent, child, cookie); |
| 2533 | } |
| 2534 | |
| 2535 | int |
| 2536 | bus_generic_config_intr(device_t dev, int irq, enum intr_trigger trig, |
| 2537 | enum intr_polarity pol) |
| 2538 | { |
| 2539 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2540 | if (dev->parent) |
| 2541 | return(BUS_CONFIG_INTR(dev->parent, irq, trig, pol)); |
| 2542 | else |
| 2543 | return(EINVAL); |
| 2544 | } |
| 2545 | |
| 2546 | struct resource * |
| 2547 | bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid, |
| 2548 | u_long start, u_long end, u_long count, u_int flags) |
| 2549 | { |
| 2550 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2551 | if (dev->parent) |
| 2552 | return(BUS_ALLOC_RESOURCE(dev->parent, child, type, rid, |
| 2553 | start, end, count, flags)); |
| 2554 | else |
| 2555 | return(NULL); |
| 2556 | } |
| 2557 | |
| 2558 | int |
| 2559 | bus_generic_release_resource(device_t dev, device_t child, int type, int rid, |
| 2560 | struct resource *r) |
| 2561 | { |
| 2562 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2563 | if (dev->parent) |
| 2564 | return(BUS_RELEASE_RESOURCE(dev->parent, child, type, rid, r)); |
| 2565 | else |
| 2566 | return(EINVAL); |
| 2567 | } |
| 2568 | |
| 2569 | int |
| 2570 | bus_generic_activate_resource(device_t dev, device_t child, int type, int rid, |
| 2571 | struct resource *r) |
| 2572 | { |
| 2573 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2574 | if (dev->parent) |
| 2575 | return(BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid, r)); |
| 2576 | else |
| 2577 | return(EINVAL); |
| 2578 | } |
| 2579 | |
| 2580 | int |
| 2581 | bus_generic_deactivate_resource(device_t dev, device_t child, int type, |
| 2582 | int rid, struct resource *r) |
| 2583 | { |
| 2584 | /* Propagate up the bus hierarchy until someone handles it. */ |
| 2585 | if (dev->parent) |
| 2586 | return(BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid, |
| 2587 | r)); |
| 2588 | else |
| 2589 | return(EINVAL); |
| 2590 | } |
| 2591 | |
| 2592 | int |
| 2593 | bus_generic_get_resource(device_t dev, device_t child, int type, int rid, |
| 2594 | u_long *startp, u_long *countp) |
| 2595 | { |
| 2596 | int error; |
| 2597 | |
| 2598 | error = ENOENT; |
| 2599 | if (dev->parent) { |
| 2600 | error = BUS_GET_RESOURCE(dev->parent, child, type, rid, |
| 2601 | startp, countp); |
| 2602 | } |
| 2603 | return (error); |
| 2604 | } |
| 2605 | |
| 2606 | int |
| 2607 | bus_generic_set_resource(device_t dev, device_t child, int type, int rid, |
| 2608 | u_long start, u_long count) |
| 2609 | { |
| 2610 | int error; |
| 2611 | |
| 2612 | error = EINVAL; |
| 2613 | if (dev->parent) { |
| 2614 | error = BUS_SET_RESOURCE(dev->parent, child, type, rid, |
| 2615 | start, count); |
| 2616 | } |
| 2617 | return (error); |
| 2618 | } |
| 2619 | |
| 2620 | void |
| 2621 | bus_generic_delete_resource(device_t dev, device_t child, int type, int rid) |
| 2622 | { |
| 2623 | if (dev->parent) |
| 2624 | BUS_DELETE_RESOURCE(dev, child, type, rid); |
| 2625 | } |
| 2626 | |
| 2627 | int |
| 2628 | bus_generic_rl_get_resource(device_t dev, device_t child, int type, int rid, |
| 2629 | u_long *startp, u_long *countp) |
| 2630 | { |
| 2631 | struct resource_list *rl = NULL; |
| 2632 | struct resource_list_entry *rle = NULL; |
| 2633 | |
| 2634 | rl = BUS_GET_RESOURCE_LIST(dev, child); |
| 2635 | if (!rl) |
| 2636 | return(EINVAL); |
| 2637 | |
| 2638 | rle = resource_list_find(rl, type, rid); |
| 2639 | if (!rle) |
| 2640 | return(ENOENT); |
| 2641 | |
| 2642 | if (startp) |
| 2643 | *startp = rle->start; |
| 2644 | if (countp) |
| 2645 | *countp = rle->count; |
| 2646 | |
| 2647 | return(0); |
| 2648 | } |
| 2649 | |
| 2650 | int |
| 2651 | bus_generic_rl_set_resource(device_t dev, device_t child, int type, int rid, |
| 2652 | u_long start, u_long count) |
| 2653 | { |
| 2654 | struct resource_list *rl = NULL; |
| 2655 | |
| 2656 | rl = BUS_GET_RESOURCE_LIST(dev, child); |
| 2657 | if (!rl) |
| 2658 | return(EINVAL); |
| 2659 | |
| 2660 | resource_list_add(rl, type, rid, start, (start + count - 1), count); |
| 2661 | |
| 2662 | return(0); |
| 2663 | } |
| 2664 | |
| 2665 | void |
| 2666 | bus_generic_rl_delete_resource(device_t dev, device_t child, int type, int rid) |
| 2667 | { |
| 2668 | struct resource_list *rl = NULL; |
| 2669 | |
| 2670 | rl = BUS_GET_RESOURCE_LIST(dev, child); |
| 2671 | if (!rl) |
| 2672 | return; |
| 2673 | |
| 2674 | resource_list_delete(rl, type, rid); |
| 2675 | } |
| 2676 | |
| 2677 | int |
| 2678 | bus_generic_rl_release_resource(device_t dev, device_t child, int type, |
| 2679 | int rid, struct resource *r) |
| 2680 | { |
| 2681 | struct resource_list *rl = NULL; |
| 2682 | |
| 2683 | rl = BUS_GET_RESOURCE_LIST(dev, child); |
| 2684 | if (!rl) |
| 2685 | return(EINVAL); |
| 2686 | |
| 2687 | return(resource_list_release(rl, dev, child, type, rid, r)); |
| 2688 | } |
| 2689 | |
| 2690 | struct resource * |
| 2691 | bus_generic_rl_alloc_resource(device_t dev, device_t child, int type, |
| 2692 | int *rid, u_long start, u_long end, u_long count, u_int flags) |
| 2693 | { |
| 2694 | struct resource_list *rl = NULL; |
| 2695 | |
| 2696 | rl = BUS_GET_RESOURCE_LIST(dev, child); |
| 2697 | if (!rl) |
| 2698 | return(NULL); |
| 2699 | |
| 2700 | return(resource_list_alloc(rl, dev, child, type, rid, |
| 2701 | start, end, count, flags)); |
| 2702 | } |
| 2703 | |
| 2704 | int |
| 2705 | bus_generic_child_present(device_t bus, device_t child) |
| 2706 | { |
| 2707 | return(BUS_CHILD_PRESENT(device_get_parent(bus), bus)); |
| 2708 | } |
| 2709 | |
| 2710 | |
| 2711 | /* |
| 2712 | * Some convenience functions to make it easier for drivers to use the |
| 2713 | * resource-management functions. All these really do is hide the |
| 2714 | * indirection through the parent's method table, making for slightly |
| 2715 | * less-wordy code. In the future, it might make sense for this code |
| 2716 | * to maintain some sort of a list of resources allocated by each device. |
| 2717 | */ |
| 2718 | int |
| 2719 | bus_alloc_resources(device_t dev, struct resource_spec *rs, |
| 2720 | struct resource **res) |
| 2721 | { |
| 2722 | int i; |
| 2723 | |
| 2724 | for (i = 0; rs[i].type != -1; i++) |
| 2725 | res[i] = NULL; |
| 2726 | for (i = 0; rs[i].type != -1; i++) { |
| 2727 | res[i] = bus_alloc_resource_any(dev, |
| 2728 | rs[i].type, &rs[i].rid, rs[i].flags); |
| 2729 | if (res[i] == NULL) { |
| 2730 | bus_release_resources(dev, rs, res); |
| 2731 | return (ENXIO); |
| 2732 | } |
| 2733 | } |
| 2734 | return (0); |
| 2735 | } |
| 2736 | |
| 2737 | void |
| 2738 | bus_release_resources(device_t dev, const struct resource_spec *rs, |
| 2739 | struct resource **res) |
| 2740 | { |
| 2741 | int i; |
| 2742 | |
| 2743 | for (i = 0; rs[i].type != -1; i++) |
| 2744 | if (res[i] != NULL) { |
| 2745 | bus_release_resource( |
| 2746 | dev, rs[i].type, rs[i].rid, res[i]); |
| 2747 | res[i] = NULL; |
| 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | struct resource * |
| 2752 | bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end, |
| 2753 | u_long count, u_int flags) |
| 2754 | { |
| 2755 | if (dev->parent == 0) |
| 2756 | return(0); |
| 2757 | return(BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end, |
| 2758 | count, flags)); |
| 2759 | } |
| 2760 | |
| 2761 | int |
| 2762 | bus_activate_resource(device_t dev, int type, int rid, struct resource *r) |
| 2763 | { |
| 2764 | if (dev->parent == 0) |
| 2765 | return(EINVAL); |
| 2766 | return(BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); |
| 2767 | } |
| 2768 | |
| 2769 | int |
| 2770 | bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r) |
| 2771 | { |
| 2772 | if (dev->parent == 0) |
| 2773 | return(EINVAL); |
| 2774 | return(BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r)); |
| 2775 | } |
| 2776 | |
| 2777 | int |
| 2778 | bus_release_resource(device_t dev, int type, int rid, struct resource *r) |
| 2779 | { |
| 2780 | if (dev->parent == 0) |
| 2781 | return(EINVAL); |
| 2782 | return(BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r)); |
| 2783 | } |
| 2784 | |
| 2785 | int |
| 2786 | bus_setup_intr(device_t dev, struct resource *r, int flags, |
| 2787 | driver_intr_t handler, void *arg, |
| 2788 | void **cookiep, lwkt_serialize_t serializer) |
| 2789 | { |
| 2790 | if (dev->parent == 0) |
| 2791 | return(EINVAL); |
| 2792 | return(BUS_SETUP_INTR(dev->parent, dev, r, flags, handler, arg, |
| 2793 | cookiep, serializer)); |
| 2794 | } |
| 2795 | |
| 2796 | int |
| 2797 | bus_teardown_intr(device_t dev, struct resource *r, void *cookie) |
| 2798 | { |
| 2799 | if (dev->parent == 0) |
| 2800 | return(EINVAL); |
| 2801 | return(BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie)); |
| 2802 | } |
| 2803 | |
| 2804 | void |
| 2805 | bus_enable_intr(device_t dev, void *cookie) |
| 2806 | { |
| 2807 | if (dev->parent) |
| 2808 | BUS_ENABLE_INTR(dev->parent, dev, cookie); |
| 2809 | } |
| 2810 | |
| 2811 | int |
| 2812 | bus_disable_intr(device_t dev, void *cookie) |
| 2813 | { |
| 2814 | if (dev->parent) |
| 2815 | return(BUS_DISABLE_INTR(dev->parent, dev, cookie)); |
| 2816 | else |
| 2817 | return(0); |
| 2818 | } |
| 2819 | |
| 2820 | int |
| 2821 | bus_set_resource(device_t dev, int type, int rid, |
| 2822 | u_long start, u_long count) |
| 2823 | { |
| 2824 | return(BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid, |
| 2825 | start, count)); |
| 2826 | } |
| 2827 | |
| 2828 | int |
| 2829 | bus_get_resource(device_t dev, int type, int rid, |
| 2830 | u_long *startp, u_long *countp) |
| 2831 | { |
| 2832 | return(BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, |
| 2833 | startp, countp)); |
| 2834 | } |
| 2835 | |
| 2836 | u_long |
| 2837 | bus_get_resource_start(device_t dev, int type, int rid) |
| 2838 | { |
| 2839 | u_long start, count; |
| 2840 | int error; |
| 2841 | |
| 2842 | error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, |
| 2843 | &start, &count); |
| 2844 | if (error) |
| 2845 | return(0); |
| 2846 | return(start); |
| 2847 | } |
| 2848 | |
| 2849 | u_long |
| 2850 | bus_get_resource_count(device_t dev, int type, int rid) |
| 2851 | { |
| 2852 | u_long start, count; |
| 2853 | int error; |
| 2854 | |
| 2855 | error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid, |
| 2856 | &start, &count); |
| 2857 | if (error) |
| 2858 | return(0); |
| 2859 | return(count); |
| 2860 | } |
| 2861 | |
| 2862 | void |
| 2863 | bus_delete_resource(device_t dev, int type, int rid) |
| 2864 | { |
| 2865 | BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid); |
| 2866 | } |
| 2867 | |
| 2868 | int |
| 2869 | bus_child_present(device_t child) |
| 2870 | { |
| 2871 | return (BUS_CHILD_PRESENT(device_get_parent(child), child)); |
| 2872 | } |
| 2873 | |
| 2874 | int |
| 2875 | bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen) |
| 2876 | { |
| 2877 | device_t parent; |
| 2878 | |
| 2879 | parent = device_get_parent(child); |
| 2880 | if (parent == NULL) { |
| 2881 | *buf = '\0'; |
| 2882 | return (0); |
| 2883 | } |
| 2884 | return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen)); |
| 2885 | } |
| 2886 | |
| 2887 | int |
| 2888 | bus_child_location_str(device_t child, char *buf, size_t buflen) |
| 2889 | { |
| 2890 | device_t parent; |
| 2891 | |
| 2892 | parent = device_get_parent(child); |
| 2893 | if (parent == NULL) { |
| 2894 | *buf = '\0'; |
| 2895 | return (0); |
| 2896 | } |
| 2897 | return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen)); |
| 2898 | } |
| 2899 | |
| 2900 | static int |
| 2901 | root_print_child(device_t dev, device_t child) |
| 2902 | { |
| 2903 | return(0); |
| 2904 | } |
| 2905 | |
| 2906 | static int |
| 2907 | root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg, |
| 2908 | void **cookiep, lwkt_serialize_t serializer) |
| 2909 | { |
| 2910 | /* |
| 2911 | * If an interrupt mapping gets to here something bad has happened. |
| 2912 | */ |
| 2913 | panic("root_setup_intr"); |
| 2914 | } |
| 2915 | |
| 2916 | /* |
| 2917 | * If we get here, assume that the device is permanant and really is |
| 2918 | * present in the system. Removable bus drivers are expected to intercept |
| 2919 | * this call long before it gets here. We return -1 so that drivers that |
| 2920 | * really care can check vs -1 or some ERRNO returned higher in the food |
| 2921 | * chain. |
| 2922 | */ |
| 2923 | static int |
| 2924 | root_child_present(device_t dev, device_t child) |
| 2925 | { |
| 2926 | return(-1); |
| 2927 | } |
| 2928 | |
| 2929 | /* |
| 2930 | * XXX NOTE! other defaults may be set in bus_if.m |
| 2931 | */ |
| 2932 | static kobj_method_t root_methods[] = { |
| 2933 | /* Device interface */ |
| 2934 | KOBJMETHOD(device_shutdown, bus_generic_shutdown), |
| 2935 | KOBJMETHOD(device_suspend, bus_generic_suspend), |
| 2936 | KOBJMETHOD(device_resume, bus_generic_resume), |
| 2937 | |
| 2938 | /* Bus interface */ |
| 2939 | KOBJMETHOD(bus_add_child, bus_generic_add_child), |
| 2940 | KOBJMETHOD(bus_print_child, root_print_child), |
| 2941 | KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar), |
| 2942 | KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar), |
| 2943 | KOBJMETHOD(bus_setup_intr, root_setup_intr), |
| 2944 | KOBJMETHOD(bus_child_present, root_child_present), |
| 2945 | |
| 2946 | { 0, 0 } |
| 2947 | }; |
| 2948 | |
| 2949 | static driver_t root_driver = { |
| 2950 | "root", |
| 2951 | root_methods, |
| 2952 | 1, /* no softc */ |
| 2953 | }; |
| 2954 | |
| 2955 | device_t root_bus; |
| 2956 | devclass_t root_devclass; |
| 2957 | |
| 2958 | static int |
| 2959 | root_bus_module_handler(module_t mod, int what, void* arg) |
| 2960 | { |
| 2961 | switch (what) { |
| 2962 | case MOD_LOAD: |
| 2963 | TAILQ_INIT(&bus_data_devices); |
| 2964 | root_bus = make_device(NULL, "root", 0); |
| 2965 | root_bus->desc = "System root bus"; |
| 2966 | kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver); |
| 2967 | root_bus->driver = &root_driver; |
| 2968 | root_bus->state = DS_ALIVE; |
| 2969 | root_devclass = devclass_find_internal("root", NULL, FALSE); |
| 2970 | devinit(); |
| 2971 | return(0); |
| 2972 | |
| 2973 | case MOD_SHUTDOWN: |
| 2974 | device_shutdown(root_bus); |
| 2975 | return(0); |
| 2976 | default: |
| 2977 | return(0); |
| 2978 | } |
| 2979 | } |
| 2980 | |
| 2981 | static moduledata_t root_bus_mod = { |
| 2982 | "rootbus", |
| 2983 | root_bus_module_handler, |
| 2984 | 0 |
| 2985 | }; |
| 2986 | DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); |
| 2987 | |
| 2988 | void |
| 2989 | root_bus_configure(void) |
| 2990 | { |
| 2991 | int warncount; |
| 2992 | device_t dev; |
| 2993 | |
| 2994 | PDEBUG((".")); |
| 2995 | |
| 2996 | /* |
| 2997 | * handle device_identify based device attachments to the root_bus |
| 2998 | * (typically nexus). |
| 2999 | */ |
| 3000 | bus_generic_probe(root_bus); |
| 3001 | |
| 3002 | /* |
| 3003 | * Probe and attach the devices under root_bus. |
| 3004 | */ |
| 3005 | TAILQ_FOREACH(dev, &root_bus->children, link) { |
| 3006 | device_probe_and_attach(dev); |
| 3007 | } |
| 3008 | |
| 3009 | /* |
| 3010 | * Wait for all asynchronous attaches to complete. If we don't |
| 3011 | * our legacy ISA bus scan could steal device unit numbers or |
| 3012 | * even I/O ports. |
| 3013 | */ |
| 3014 | warncount = 10; |
| 3015 | if (numasyncthreads) |
| 3016 | kprintf("Waiting for async drivers to attach\n"); |
| 3017 | while (numasyncthreads > 0) { |
| 3018 | if (tsleep(&numasyncthreads, 0, "rootbus", hz) == EWOULDBLOCK) |
| 3019 | --warncount; |
| 3020 | if (warncount == 0) { |
| 3021 | kprintf("Warning: Still waiting for %d " |
| 3022 | "drivers to attach\n", numasyncthreads); |
| 3023 | } else if (warncount == -30) { |
| 3024 | kprintf("Giving up on %d drivers\n", numasyncthreads); |
| 3025 | break; |
| 3026 | } |
| 3027 | } |
| 3028 | root_bus->state = DS_ATTACHED; |
| 3029 | } |
| 3030 | |
| 3031 | int |
| 3032 | driver_module_handler(module_t mod, int what, void *arg) |
| 3033 | { |
| 3034 | int error; |
| 3035 | struct driver_module_data *dmd; |
| 3036 | devclass_t bus_devclass; |
| 3037 | kobj_class_t driver; |
| 3038 | const char *parentname; |
| 3039 | |
| 3040 | dmd = (struct driver_module_data *)arg; |
| 3041 | bus_devclass = devclass_find_internal(dmd->dmd_busname, NULL, TRUE); |
| 3042 | error = 0; |
| 3043 | |
| 3044 | switch (what) { |
| 3045 | case MOD_LOAD: |
| 3046 | if (dmd->dmd_chainevh) |
| 3047 | error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); |
| 3048 | |
| 3049 | driver = dmd->dmd_driver; |
| 3050 | PDEBUG(("Loading module: driver %s on bus %s", |
| 3051 | DRIVERNAME(driver), dmd->dmd_busname)); |
| 3052 | |
| 3053 | /* |
| 3054 | * If the driver has any base classes, make the |
| 3055 | * devclass inherit from the devclass of the driver's |
| 3056 | * first base class. This will allow the system to |
| 3057 | * search for drivers in both devclasses for children |
| 3058 | * of a device using this driver. |
| 3059 | */ |
| 3060 | if (driver->baseclasses) |
| 3061 | parentname = driver->baseclasses[0]->name; |
| 3062 | else |
| 3063 | parentname = NULL; |
| 3064 | *dmd->dmd_devclass = devclass_find_internal(driver->name, |
| 3065 | parentname, TRUE); |
| 3066 | |
| 3067 | error = devclass_add_driver(bus_devclass, driver); |
| 3068 | if (error) |
| 3069 | break; |
| 3070 | break; |
| 3071 | |
| 3072 | case MOD_UNLOAD: |
| 3073 | PDEBUG(("Unloading module: driver %s from bus %s", |
| 3074 | DRIVERNAME(dmd->dmd_driver), dmd->dmd_busname)); |
| 3075 | error = devclass_delete_driver(bus_devclass, dmd->dmd_driver); |
| 3076 | |
| 3077 | if (!error && dmd->dmd_chainevh) |
| 3078 | error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg); |
| 3079 | break; |
| 3080 | } |
| 3081 | |
| 3082 | return (error); |
| 3083 | } |
| 3084 | |
| 3085 | #ifdef BUS_DEBUG |
| 3086 | |
| 3087 | /* |
| 3088 | * The _short versions avoid iteration by not calling anything that prints |
| 3089 | * more than oneliners. I love oneliners. |
| 3090 | */ |
| 3091 | |
| 3092 | static void |
| 3093 | print_device_short(device_t dev, int indent) |
| 3094 | { |
| 3095 | if (!dev) |
| 3096 | return; |
| 3097 | |
| 3098 | indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n", |
| 3099 | dev->unit, dev->desc, |
| 3100 | (dev->parent? "":"no "), |
| 3101 | (TAILQ_EMPTY(&dev->children)? "no ":""), |
| 3102 | (dev->flags&DF_ENABLED? "enabled,":"disabled,"), |
| 3103 | (dev->flags&DF_FIXEDCLASS? "fixed,":""), |
| 3104 | (dev->flags&DF_WILDCARD? "wildcard,":""), |
| 3105 | (dev->flags&DF_DESCMALLOCED? "descmalloced,":""), |
| 3106 | (dev->ivars? "":"no "), |
| 3107 | (dev->softc? "":"no "), |
| 3108 | dev->busy)); |
| 3109 | } |
| 3110 | |
| 3111 | static void |
| 3112 | print_device(device_t dev, int indent) |
| 3113 | { |
| 3114 | if (!dev) |
| 3115 | return; |
| 3116 | |
| 3117 | print_device_short(dev, indent); |
| 3118 | |
| 3119 | indentprintf(("Parent:\n")); |
| 3120 | print_device_short(dev->parent, indent+1); |
| 3121 | indentprintf(("Driver:\n")); |
| 3122 | print_driver_short(dev->driver, indent+1); |
| 3123 | indentprintf(("Devclass:\n")); |
| 3124 | print_devclass_short(dev->devclass, indent+1); |
| 3125 | } |
| 3126 | |
| 3127 | /* |
| 3128 | * Print the device and all its children (indented). |
| 3129 | */ |
| 3130 | void |
| 3131 | print_device_tree_short(device_t dev, int indent) |
| 3132 | { |
| 3133 | device_t child; |
| 3134 | |
| 3135 | if (!dev) |
| 3136 | return; |
| 3137 | |
| 3138 | print_device_short(dev, indent); |
| 3139 | |
| 3140 | TAILQ_FOREACH(child, &dev->children, link) |
| 3141 | print_device_tree_short(child, indent+1); |
| 3142 | } |
| 3143 | |
| 3144 | /* |
| 3145 | * Print the device and all its children (indented). |
| 3146 | */ |
| 3147 | void |
| 3148 | print_device_tree(device_t dev, int indent) |
| 3149 | { |
| 3150 | device_t child; |
| 3151 | |
| 3152 | if (!dev) |
| 3153 | return; |
| 3154 | |
| 3155 | print_device(dev, indent); |
| 3156 | |
| 3157 | TAILQ_FOREACH(child, &dev->children, link) |
| 3158 | print_device_tree(child, indent+1); |
| 3159 | } |
| 3160 | |
| 3161 | static void |
| 3162 | print_driver_short(driver_t *driver, int indent) |
| 3163 | { |
| 3164 | if (!driver) |
| 3165 | return; |
| 3166 | |
| 3167 | indentprintf(("driver %s: softc size = %d\n", |
| 3168 | driver->name, driver->size)); |
| 3169 | } |
| 3170 | |
| 3171 | static void |
| 3172 | print_driver(driver_t *driver, int indent) |
| 3173 | { |
| 3174 | if (!driver) |
| 3175 | return; |
| 3176 | |
| 3177 | print_driver_short(driver, indent); |
| 3178 | } |
| 3179 | |
| 3180 | |
| 3181 | static void |
| 3182 | print_driver_list(driver_list_t drivers, int indent) |
| 3183 | { |
| 3184 | driverlink_t driver; |
| 3185 | |
| 3186 | TAILQ_FOREACH(driver, &drivers, link) |
| 3187 | print_driver(driver->driver, indent); |
| 3188 | } |
| 3189 | |
| 3190 | static void |
| 3191 | print_devclass_short(devclass_t dc, int indent) |
| 3192 | { |
| 3193 | if (!dc) |
| 3194 | return; |
| 3195 | |
| 3196 | indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit)); |
| 3197 | } |
| 3198 | |
| 3199 | static void |
| 3200 | print_devclass(devclass_t dc, int indent) |
| 3201 | { |
| 3202 | int i; |
| 3203 | |
| 3204 | if (!dc) |
| 3205 | return; |
| 3206 | |
| 3207 | print_devclass_short(dc, indent); |
| 3208 | indentprintf(("Drivers:\n")); |
| 3209 | print_driver_list(dc->drivers, indent+1); |
| 3210 | |
| 3211 | indentprintf(("Devices:\n")); |
| 3212 | for (i = 0; i < dc->maxunit; i++) |
| 3213 | if (dc->devices[i]) |
| 3214 | print_device(dc->devices[i], indent+1); |
| 3215 | } |
| 3216 | |
| 3217 | void |
| 3218 | print_devclass_list_short(void) |
| 3219 | { |
| 3220 | devclass_t dc; |
| 3221 | |
| 3222 | kprintf("Short listing of devclasses, drivers & devices:\n"); |
| 3223 | TAILQ_FOREACH(dc, &devclasses, link) { |
| 3224 | print_devclass_short(dc, 0); |
| 3225 | } |
| 3226 | } |
| 3227 | |
| 3228 | void |
| 3229 | print_devclass_list(void) |
| 3230 | { |
| 3231 | devclass_t dc; |
| 3232 | |
| 3233 | kprintf("Full listing of devclasses, drivers & devices:\n"); |
| 3234 | TAILQ_FOREACH(dc, &devclasses, link) { |
| 3235 | print_devclass(dc, 0); |
| 3236 | } |
| 3237 | } |
| 3238 | |
| 3239 | #endif |
| 3240 | |
| 3241 | /* |
| 3242 | * Check to see if a device is disabled via a disabled hint. |
| 3243 | */ |
| 3244 | int |
| 3245 | resource_disabled(const char *name, int unit) |
| 3246 | { |
| 3247 | int error, value; |
| 3248 | |
| 3249 | error = resource_int_value(name, unit, "disabled", &value); |
| 3250 | if (error) |
| 3251 | return(0); |
| 3252 | return(value); |
| 3253 | } |
| 3254 | |
| 3255 | /* |
| 3256 | * User-space access to the device tree. |
| 3257 | * |
| 3258 | * We implement a small set of nodes: |
| 3259 | * |
| 3260 | * hw.bus Single integer read method to obtain the |
| 3261 | * current generation count. |
| 3262 | * hw.bus.devices Reads the entire device tree in flat space. |
| 3263 | * hw.bus.rman Resource manager interface |
| 3264 | * |
| 3265 | * We might like to add the ability to scan devclasses and/or drivers to |
| 3266 | * determine what else is currently loaded/available. |
| 3267 | */ |
| 3268 | |
| 3269 | static int |
| 3270 | sysctl_bus(SYSCTL_HANDLER_ARGS) |
| 3271 | { |
| 3272 | struct u_businfo ubus; |
| 3273 | |
| 3274 | ubus.ub_version = BUS_USER_VERSION; |
| 3275 | ubus.ub_generation = bus_data_generation; |
| 3276 | |
| 3277 | return (SYSCTL_OUT(req, &ubus, sizeof(ubus))); |
| 3278 | } |
| 3279 | SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus, |
| 3280 | "bus-related data"); |
| 3281 | |
| 3282 | static int |
| 3283 | sysctl_devices(SYSCTL_HANDLER_ARGS) |
| 3284 | { |
| 3285 | int *name = (int *)arg1; |
| 3286 | u_int namelen = arg2; |
| 3287 | int index; |
| 3288 | struct device *dev; |
| 3289 | struct u_device udev; /* XXX this is a bit big */ |
| 3290 | int error; |
| 3291 | |
| 3292 | if (namelen != 2) |
| 3293 | return (EINVAL); |
| 3294 | |
| 3295 | if (bus_data_generation_check(name[0])) |
| 3296 | return (EINVAL); |
| 3297 | |
| 3298 | index = name[1]; |
| 3299 | |
| 3300 | /* |
| 3301 | * Scan the list of devices, looking for the requested index. |
| 3302 | */ |
| 3303 | TAILQ_FOREACH(dev, &bus_data_devices, devlink) { |
| 3304 | if (index-- == 0) |
| 3305 | break; |
| 3306 | } |
| 3307 | if (dev == NULL) |
| 3308 | return (ENOENT); |
| 3309 | |
| 3310 | /* |
| 3311 | * Populate the return array. |
| 3312 | */ |
| 3313 | bzero(&udev, sizeof(udev)); |
| 3314 | udev.dv_handle = (uintptr_t)dev; |
| 3315 | udev.dv_parent = (uintptr_t)dev->parent; |
| 3316 | if (dev->nameunit != NULL) |
| 3317 | strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name)); |
| 3318 | if (dev->desc != NULL) |
| 3319 | strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc)); |
| 3320 | if (dev->driver != NULL && dev->driver->name != NULL) |
| 3321 | strlcpy(udev.dv_drivername, dev->driver->name, |
| 3322 | sizeof(udev.dv_drivername)); |
| 3323 | bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo)); |
| 3324 | bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location)); |
| 3325 | udev.dv_devflags = dev->devflags; |
| 3326 | udev.dv_flags = dev->flags; |
| 3327 | udev.dv_state = dev->state; |
| 3328 | error = SYSCTL_OUT(req, &udev, sizeof(udev)); |
| 3329 | return (error); |
| 3330 | } |
| 3331 | |
| 3332 | SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices, |
| 3333 | "system device tree"); |
| 3334 | |
| 3335 | int |
| 3336 | bus_data_generation_check(int generation) |
| 3337 | { |
| 3338 | if (generation != bus_data_generation) |
| 3339 | return (1); |
| 3340 | |
| 3341 | /* XXX generate optimised lists here? */ |
| 3342 | return (0); |
| 3343 | } |
| 3344 | |
| 3345 | void |
| 3346 | bus_data_generation_update(void) |
| 3347 | { |
| 3348 | bus_data_generation++; |
| 3349 | } |