subr_device.c revision 1.1.2.2
1 1.1.2.2 cube /* $NetBSD: subr_device.c,v 1.1.2.2 2008/01/30 22:08:51 cube Exp $ */ 2 1.1.2.1 cube 3 1.1.2.1 cube /* 4 1.1.2.1 cube * Copyright (c) 1996, 2000 Christopher G. Demetriou 5 1.1.2.1 cube * All rights reserved. 6 1.1.2.1 cube * 7 1.1.2.1 cube * Redistribution and use in source and binary forms, with or without 8 1.1.2.1 cube * modification, are permitted provided that the following conditions 9 1.1.2.1 cube * are met: 10 1.1.2.1 cube * 1. Redistributions of source code must retain the above copyright 11 1.1.2.1 cube * notice, this list of conditions and the following disclaimer. 12 1.1.2.1 cube * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.1 cube * notice, this list of conditions and the following disclaimer in the 14 1.1.2.1 cube * documentation and/or other materials provided with the distribution. 15 1.1.2.1 cube * 3. All advertising materials mentioning features or use of this software 16 1.1.2.1 cube * must display the following acknowledgement: 17 1.1.2.1 cube * This product includes software developed for the 18 1.1.2.1 cube * NetBSD Project. See http://www.NetBSD.org/ for 19 1.1.2.1 cube * information about NetBSD. 20 1.1.2.1 cube * 4. The name of the author may not be used to endorse or promote products 21 1.1.2.1 cube * derived from this software without specific prior written permission. 22 1.1.2.1 cube * 23 1.1.2.1 cube * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 1.1.2.1 cube * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 1.1.2.1 cube * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 1.1.2.1 cube * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 1.1.2.1 cube * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 1.1.2.1 cube * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 1.1.2.1 cube * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 1.1.2.1 cube * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 1.1.2.1 cube * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 1.1.2.1 cube * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 1.1.2.1 cube * 34 1.1.2.1 cube * --(license Id: LICENSE.proto,v 1.1 2000/06/13 21:40:26 cgd Exp )-- 35 1.1.2.1 cube */ 36 1.1.2.1 cube 37 1.1.2.1 cube /* 38 1.1.2.1 cube * Copyright (c) 1992, 1993 39 1.1.2.1 cube * The Regents of the University of California. All rights reserved. 40 1.1.2.1 cube * 41 1.1.2.1 cube * This software was developed by the Computer Systems Engineering group 42 1.1.2.1 cube * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 43 1.1.2.1 cube * contributed to Berkeley. 44 1.1.2.1 cube * 45 1.1.2.1 cube * All advertising materials mentioning features or use of this software 46 1.1.2.1 cube * must display the following acknowledgement: 47 1.1.2.1 cube * This product includes software developed by the University of 48 1.1.2.1 cube * California, Lawrence Berkeley Laboratories. 49 1.1.2.1 cube * 50 1.1.2.1 cube * Redistribution and use in source and binary forms, with or without 51 1.1.2.1 cube * modification, are permitted provided that the following conditions 52 1.1.2.1 cube * are met: 53 1.1.2.1 cube * 1. Redistributions of source code must retain the above copyright 54 1.1.2.1 cube * notice, this list of conditions and the following disclaimer. 55 1.1.2.1 cube * 2. Redistributions in binary form must reproduce the above copyright 56 1.1.2.1 cube * notice, this list of conditions and the following disclaimer in the 57 1.1.2.1 cube * documentation and/or other materials provided with the distribution. 58 1.1.2.1 cube * 3. Neither the name of the University nor the names of its contributors 59 1.1.2.1 cube * may be used to endorse or promote products derived from this software 60 1.1.2.1 cube * without specific prior written permission. 61 1.1.2.1 cube * 62 1.1.2.1 cube * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 1.1.2.1 cube * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 1.1.2.1 cube * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 1.1.2.1 cube * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 1.1.2.1 cube * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 1.1.2.1 cube * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 1.1.2.1 cube * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 1.1.2.1 cube * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 1.1.2.1 cube * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 1.1.2.1 cube * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 1.1.2.1 cube * SUCH DAMAGE. 73 1.1.2.1 cube * 74 1.1.2.1 cube * from: Header: subr_autoconf.c,v 1.12 93/02/01 19:31:48 torek Exp (LBL) 75 1.1.2.1 cube * 76 1.1.2.1 cube * @(#)subr_autoconf.c 8.3 (Berkeley) 5/17/94 77 1.1.2.1 cube */ 78 1.1.2.1 cube 79 1.1.2.1 cube #include <sys/cdefs.h> 80 1.1.2.2 cube __KERNEL_RCSID(0, "$NetBSD: subr_device.c,v 1.1.2.2 2008/01/30 22:08:51 cube Exp $"); 81 1.1.2.1 cube 82 1.1.2.1 cube #include <sys/param.h> 83 1.1.2.1 cube #include <sys/device.h> 84 1.1.2.1 cube #include <sys/malloc.h> 85 1.1.2.1 cube 86 1.1.2.1 cube /* list of all devices */ 87 1.1.2.1 cube struct devicelist alldevs = TAILQ_HEAD_INITIALIZER(alldevs); 88 1.1.2.1 cube 89 1.1.2.1 cube /* 90 1.1.2.1 cube * device_lookup: 91 1.1.2.1 cube * 92 1.1.2.1 cube * Look up a device instance for a given driver. 93 1.1.2.1 cube */ 94 1.1.2.1 cube void * 95 1.1.2.1 cube device_lookup(cfdriver_t cd, int unit) 96 1.1.2.1 cube { 97 1.1.2.1 cube 98 1.1.2.1 cube if (unit < 0 || unit >= cd->cd_ndevs) 99 1.1.2.1 cube return (NULL); 100 1.1.2.1 cube 101 1.1.2.1 cube return (cd->cd_devs[unit]); 102 1.1.2.1 cube } 103 1.1.2.1 cube 104 1.1.2.1 cube /* 105 1.1.2.1 cube * Accessor functions for the device_t type. 106 1.1.2.1 cube */ 107 1.1.2.1 cube devclass_t 108 1.1.2.1 cube device_class(device_t dev) 109 1.1.2.1 cube { 110 1.1.2.1 cube 111 1.1.2.1 cube return (dev->dv_class); 112 1.1.2.1 cube } 113 1.1.2.1 cube 114 1.1.2.1 cube cfdata_t 115 1.1.2.1 cube device_cfdata(device_t dev) 116 1.1.2.1 cube { 117 1.1.2.1 cube 118 1.1.2.1 cube return (dev->dv_cfdata); 119 1.1.2.1 cube } 120 1.1.2.1 cube 121 1.1.2.1 cube cfdriver_t 122 1.1.2.1 cube device_cfdriver(device_t dev) 123 1.1.2.1 cube { 124 1.1.2.1 cube 125 1.1.2.1 cube return (dev->dv_cfdriver); 126 1.1.2.1 cube } 127 1.1.2.1 cube 128 1.1.2.1 cube cfattach_t 129 1.1.2.1 cube device_cfattach(device_t dev) 130 1.1.2.1 cube { 131 1.1.2.1 cube 132 1.1.2.1 cube return (dev->dv_cfattach); 133 1.1.2.1 cube } 134 1.1.2.1 cube 135 1.1.2.1 cube int 136 1.1.2.1 cube device_unit(device_t dev) 137 1.1.2.1 cube { 138 1.1.2.1 cube 139 1.1.2.1 cube return (dev->dv_unit); 140 1.1.2.1 cube } 141 1.1.2.1 cube 142 1.1.2.1 cube const char * 143 1.1.2.1 cube device_xname(device_t dev) 144 1.1.2.1 cube { 145 1.1.2.1 cube 146 1.1.2.1 cube return (dev->dv_xname); 147 1.1.2.1 cube } 148 1.1.2.1 cube 149 1.1.2.1 cube device_t 150 1.1.2.1 cube device_parent(device_t dev) 151 1.1.2.1 cube { 152 1.1.2.1 cube 153 1.1.2.1 cube return (dev->dv_parent); 154 1.1.2.1 cube } 155 1.1.2.1 cube 156 1.1.2.1 cube bool 157 1.1.2.1 cube device_is_active(device_t dev) 158 1.1.2.1 cube { 159 1.1.2.1 cube int active_flags; 160 1.1.2.1 cube 161 1.1.2.1 cube active_flags = DVF_ACTIVE; 162 1.1.2.1 cube active_flags |= DVF_CLASS_SUSPENDED; 163 1.1.2.1 cube active_flags |= DVF_DRIVER_SUSPENDED; 164 1.1.2.1 cube active_flags |= DVF_BUS_SUSPENDED; 165 1.1.2.1 cube 166 1.1.2.1 cube return ((dev->dv_flags & active_flags) == DVF_ACTIVE); 167 1.1.2.1 cube } 168 1.1.2.1 cube 169 1.1.2.1 cube bool 170 1.1.2.1 cube device_is_enabled(device_t dev) 171 1.1.2.1 cube { 172 1.1.2.1 cube return (dev->dv_flags & DVF_ACTIVE) == DVF_ACTIVE; 173 1.1.2.1 cube } 174 1.1.2.1 cube 175 1.1.2.1 cube bool 176 1.1.2.1 cube device_has_power(device_t dev) 177 1.1.2.1 cube { 178 1.1.2.1 cube int active_flags; 179 1.1.2.1 cube 180 1.1.2.1 cube active_flags = DVF_ACTIVE | DVF_BUS_SUSPENDED; 181 1.1.2.1 cube 182 1.1.2.1 cube return ((dev->dv_flags & active_flags) == DVF_ACTIVE); 183 1.1.2.1 cube } 184 1.1.2.1 cube 185 1.1.2.1 cube int 186 1.1.2.1 cube device_locator(device_t dev, u_int locnum) 187 1.1.2.1 cube { 188 1.1.2.1 cube 189 1.1.2.1 cube KASSERT(dev->dv_locators != NULL); 190 1.1.2.1 cube return (dev->dv_locators[locnum]); 191 1.1.2.1 cube } 192 1.1.2.1 cube 193 1.1.2.1 cube void * 194 1.1.2.1 cube device_private(device_t dev) 195 1.1.2.1 cube { 196 1.1.2.1 cube 197 1.1.2.2 cube /* 198 1.1.2.2 cube * The reason why device_private(NULL) is allowed is to simplify the 199 1.1.2.2 cube * work of a lot of userspace request handlers (i.e., c/bdev 200 1.1.2.2 cube * handlers) which grab cfdriver_t->cd_units[n]. 201 1.1.2.2 cube * It avoids having them test for it to be NULL and only then calling 202 1.1.2.2 cube * device_private. 203 1.1.2.2 cube */ 204 1.1.2.2 cube return dev == NULL ? NULL : dev->dv_private; 205 1.1.2.1 cube } 206 1.1.2.1 cube 207 1.1.2.1 cube prop_dictionary_t 208 1.1.2.1 cube device_properties(device_t dev) 209 1.1.2.1 cube { 210 1.1.2.1 cube 211 1.1.2.1 cube return (dev->dv_properties); 212 1.1.2.1 cube } 213 1.1.2.1 cube 214 1.1.2.1 cube /* 215 1.1.2.1 cube * device_is_a: 216 1.1.2.1 cube * 217 1.1.2.1 cube * Returns true if the device is an instance of the specified 218 1.1.2.1 cube * driver. 219 1.1.2.1 cube */ 220 1.1.2.1 cube bool 221 1.1.2.1 cube device_is_a(device_t dev, const char *dname) 222 1.1.2.1 cube { 223 1.1.2.1 cube 224 1.1.2.1 cube return (strcmp(dev->dv_cfdriver->cd_name, dname) == 0); 225 1.1.2.1 cube } 226 1.1.2.1 cube 227 1.1.2.1 cube /* 228 1.1.2.1 cube * Power management related functions. 229 1.1.2.1 cube */ 230 1.1.2.1 cube 231 1.1.2.1 cube bool 232 1.1.2.1 cube device_pmf_is_registered(device_t dev) 233 1.1.2.1 cube { 234 1.1.2.1 cube return (dev->dv_flags & DVF_POWER_HANDLERS) != 0; 235 1.1.2.1 cube } 236 1.1.2.1 cube 237 1.1.2.1 cube bool 238 1.1.2.1 cube device_pmf_driver_suspend(device_t dev) 239 1.1.2.1 cube { 240 1.1.2.1 cube if ((dev->dv_flags & DVF_DRIVER_SUSPENDED) != 0) 241 1.1.2.1 cube return true; 242 1.1.2.1 cube if ((dev->dv_flags & DVF_CLASS_SUSPENDED) == 0) 243 1.1.2.1 cube return false; 244 1.1.2.1 cube if (*dev->dv_driver_suspend != NULL && 245 1.1.2.1 cube !(*dev->dv_driver_suspend)(dev)) 246 1.1.2.1 cube return false; 247 1.1.2.1 cube 248 1.1.2.1 cube dev->dv_flags |= DVF_DRIVER_SUSPENDED; 249 1.1.2.1 cube return true; 250 1.1.2.1 cube } 251 1.1.2.1 cube 252 1.1.2.1 cube bool 253 1.1.2.1 cube device_pmf_driver_resume(device_t dev) 254 1.1.2.1 cube { 255 1.1.2.1 cube if ((dev->dv_flags & DVF_DRIVER_SUSPENDED) == 0) 256 1.1.2.1 cube return true; 257 1.1.2.1 cube if ((dev->dv_flags & DVF_BUS_SUSPENDED) != 0) 258 1.1.2.1 cube return false; 259 1.1.2.1 cube if (*dev->dv_driver_resume != NULL && 260 1.1.2.1 cube !(*dev->dv_driver_resume)(dev)) 261 1.1.2.1 cube return false; 262 1.1.2.1 cube 263 1.1.2.1 cube dev->dv_flags &= ~DVF_DRIVER_SUSPENDED; 264 1.1.2.1 cube return true; 265 1.1.2.1 cube } 266 1.1.2.1 cube 267 1.1.2.1 cube void 268 1.1.2.1 cube device_pmf_driver_register(device_t dev, 269 1.1.2.1 cube bool (*suspend)(device_t), bool (*resume)(device_t)) 270 1.1.2.1 cube { 271 1.1.2.1 cube dev->dv_driver_suspend = suspend; 272 1.1.2.1 cube dev->dv_driver_resume = resume; 273 1.1.2.1 cube dev->dv_flags |= DVF_POWER_HANDLERS; 274 1.1.2.1 cube } 275 1.1.2.1 cube 276 1.1.2.1 cube void 277 1.1.2.1 cube device_pmf_driver_deregister(device_t dev) 278 1.1.2.1 cube { 279 1.1.2.1 cube dev->dv_driver_suspend = NULL; 280 1.1.2.1 cube dev->dv_driver_resume = NULL; 281 1.1.2.1 cube dev->dv_flags &= ~DVF_POWER_HANDLERS; 282 1.1.2.1 cube } 283 1.1.2.1 cube 284 1.1.2.1 cube bool 285 1.1.2.1 cube device_pmf_driver_child_register(device_t dev) 286 1.1.2.1 cube { 287 1.1.2.1 cube device_t parent = device_parent(dev); 288 1.1.2.1 cube 289 1.1.2.1 cube if (parent == NULL || parent->dv_driver_child_register == NULL) 290 1.1.2.1 cube return true; 291 1.1.2.1 cube return (*parent->dv_driver_child_register)(dev); 292 1.1.2.1 cube } 293 1.1.2.1 cube 294 1.1.2.1 cube void 295 1.1.2.1 cube device_pmf_driver_set_child_register(device_t dev, 296 1.1.2.1 cube bool (*child_register)(device_t)) 297 1.1.2.1 cube { 298 1.1.2.1 cube dev->dv_driver_child_register = child_register; 299 1.1.2.1 cube } 300 1.1.2.1 cube 301 1.1.2.1 cube void * 302 1.1.2.1 cube device_pmf_bus_private(device_t dev) 303 1.1.2.1 cube { 304 1.1.2.1 cube return dev->dv_bus_private; 305 1.1.2.1 cube } 306 1.1.2.1 cube 307 1.1.2.1 cube bool 308 1.1.2.1 cube device_pmf_bus_suspend(device_t dev) 309 1.1.2.1 cube { 310 1.1.2.1 cube if ((dev->dv_flags & DVF_BUS_SUSPENDED) != 0) 311 1.1.2.1 cube return true; 312 1.1.2.1 cube if ((dev->dv_flags & DVF_CLASS_SUSPENDED) == 0 || 313 1.1.2.1 cube (dev->dv_flags & DVF_DRIVER_SUSPENDED) == 0) 314 1.1.2.1 cube return false; 315 1.1.2.1 cube if (*dev->dv_bus_suspend != NULL && 316 1.1.2.1 cube !(*dev->dv_bus_suspend)(dev)) 317 1.1.2.1 cube return false; 318 1.1.2.1 cube 319 1.1.2.1 cube dev->dv_flags |= DVF_BUS_SUSPENDED; 320 1.1.2.1 cube return true; 321 1.1.2.1 cube } 322 1.1.2.1 cube 323 1.1.2.1 cube bool 324 1.1.2.1 cube device_pmf_bus_resume(device_t dev) 325 1.1.2.1 cube { 326 1.1.2.1 cube if ((dev->dv_flags & DVF_BUS_SUSPENDED) == 0) 327 1.1.2.1 cube return true; 328 1.1.2.1 cube if (*dev->dv_bus_resume != NULL && 329 1.1.2.1 cube !(*dev->dv_bus_resume)(dev)) 330 1.1.2.1 cube return false; 331 1.1.2.1 cube 332 1.1.2.1 cube dev->dv_flags &= ~DVF_BUS_SUSPENDED; 333 1.1.2.1 cube return true; 334 1.1.2.1 cube } 335 1.1.2.1 cube 336 1.1.2.1 cube void 337 1.1.2.1 cube device_pmf_bus_register(device_t dev, void *priv, 338 1.1.2.1 cube bool (*suspend)(device_t), bool (*resume)(device_t), 339 1.1.2.1 cube void (*deregister)(device_t)) 340 1.1.2.1 cube { 341 1.1.2.1 cube dev->dv_bus_private = priv; 342 1.1.2.1 cube dev->dv_bus_resume = resume; 343 1.1.2.1 cube dev->dv_bus_suspend = suspend; 344 1.1.2.1 cube dev->dv_bus_deregister = deregister; 345 1.1.2.1 cube } 346 1.1.2.1 cube 347 1.1.2.1 cube void 348 1.1.2.1 cube device_pmf_bus_deregister(device_t dev) 349 1.1.2.1 cube { 350 1.1.2.1 cube if (dev->dv_bus_deregister == NULL) 351 1.1.2.1 cube return; 352 1.1.2.1 cube (*dev->dv_bus_deregister)(dev); 353 1.1.2.1 cube dev->dv_bus_private = NULL; 354 1.1.2.1 cube dev->dv_bus_suspend = NULL; 355 1.1.2.1 cube dev->dv_bus_resume = NULL; 356 1.1.2.1 cube dev->dv_bus_deregister = NULL; 357 1.1.2.1 cube } 358 1.1.2.1 cube 359 1.1.2.1 cube void * 360 1.1.2.1 cube device_pmf_class_private(device_t dev) 361 1.1.2.1 cube { 362 1.1.2.1 cube return dev->dv_class_private; 363 1.1.2.1 cube } 364 1.1.2.1 cube 365 1.1.2.1 cube bool 366 1.1.2.1 cube device_pmf_class_suspend(device_t dev) 367 1.1.2.1 cube { 368 1.1.2.1 cube if ((dev->dv_flags & DVF_CLASS_SUSPENDED) != 0) 369 1.1.2.1 cube return true; 370 1.1.2.1 cube if (*dev->dv_class_suspend != NULL && 371 1.1.2.1 cube !(*dev->dv_class_suspend)(dev)) 372 1.1.2.1 cube return false; 373 1.1.2.1 cube 374 1.1.2.1 cube dev->dv_flags |= DVF_CLASS_SUSPENDED; 375 1.1.2.1 cube return true; 376 1.1.2.1 cube } 377 1.1.2.1 cube 378 1.1.2.1 cube bool 379 1.1.2.1 cube device_pmf_class_resume(device_t dev) 380 1.1.2.1 cube { 381 1.1.2.1 cube if ((dev->dv_flags & DVF_CLASS_SUSPENDED) == 0) 382 1.1.2.1 cube return true; 383 1.1.2.1 cube if ((dev->dv_flags & DVF_BUS_SUSPENDED) != 0 || 384 1.1.2.1 cube (dev->dv_flags & DVF_DRIVER_SUSPENDED) != 0) 385 1.1.2.1 cube return false; 386 1.1.2.1 cube if (*dev->dv_class_resume != NULL && 387 1.1.2.1 cube !(*dev->dv_class_resume)(dev)) 388 1.1.2.1 cube return false; 389 1.1.2.1 cube 390 1.1.2.1 cube dev->dv_flags &= ~DVF_CLASS_SUSPENDED; 391 1.1.2.1 cube return true; 392 1.1.2.1 cube } 393 1.1.2.1 cube 394 1.1.2.1 cube void 395 1.1.2.1 cube device_pmf_class_register(device_t dev, void *priv, 396 1.1.2.1 cube bool (*suspend)(device_t), bool (*resume)(device_t), 397 1.1.2.1 cube void (*deregister)(device_t)) 398 1.1.2.1 cube { 399 1.1.2.1 cube dev->dv_class_private = priv; 400 1.1.2.1 cube dev->dv_class_suspend = suspend; 401 1.1.2.1 cube dev->dv_class_resume = resume; 402 1.1.2.1 cube dev->dv_class_deregister = deregister; 403 1.1.2.1 cube } 404 1.1.2.1 cube 405 1.1.2.1 cube void 406 1.1.2.1 cube device_pmf_class_deregister(device_t dev) 407 1.1.2.1 cube { 408 1.1.2.1 cube if (dev->dv_class_deregister == NULL) 409 1.1.2.1 cube return; 410 1.1.2.1 cube (*dev->dv_class_deregister)(dev); 411 1.1.2.1 cube dev->dv_class_private = NULL; 412 1.1.2.1 cube dev->dv_class_suspend = NULL; 413 1.1.2.1 cube dev->dv_class_resume = NULL; 414 1.1.2.1 cube dev->dv_class_deregister = NULL; 415 1.1.2.1 cube } 416 1.1.2.1 cube 417 1.1.2.1 cube bool 418 1.1.2.1 cube device_active(device_t dev, devactive_t type) 419 1.1.2.1 cube { 420 1.1.2.1 cube size_t i; 421 1.1.2.1 cube 422 1.1.2.1 cube if (dev->dv_activity_count == 0) 423 1.1.2.1 cube return false; 424 1.1.2.1 cube 425 1.1.2.1 cube for (i = 0; i < dev->dv_activity_count; ++i) 426 1.1.2.1 cube (*dev->dv_activity_handlers[i])(dev, type); 427 1.1.2.1 cube 428 1.1.2.1 cube return true; 429 1.1.2.1 cube } 430 1.1.2.1 cube 431 1.1.2.1 cube bool 432 1.1.2.1 cube device_active_register(device_t dev, void (*handler)(device_t, devactive_t)) 433 1.1.2.1 cube { 434 1.1.2.1 cube void (**new_handlers)(device_t, devactive_t); 435 1.1.2.1 cube void (**old_handlers)(device_t, devactive_t); 436 1.1.2.1 cube size_t i, new_size; 437 1.1.2.1 cube int s; 438 1.1.2.1 cube 439 1.1.2.1 cube old_handlers = dev->dv_activity_handlers; 440 1.1.2.1 cube 441 1.1.2.1 cube for (i = 0; i < dev->dv_activity_count; ++i) { 442 1.1.2.1 cube if (old_handlers[i] == handler) 443 1.1.2.1 cube panic("Double registering of idle handlers"); 444 1.1.2.1 cube } 445 1.1.2.1 cube 446 1.1.2.1 cube new_size = dev->dv_activity_count + 1; 447 1.1.2.1 cube new_handlers = malloc(sizeof(void *) * new_size, M_DEVBUF, M_WAITOK); 448 1.1.2.1 cube 449 1.1.2.1 cube memcpy(new_handlers, old_handlers, 450 1.1.2.1 cube sizeof(void *) * dev->dv_activity_count); 451 1.1.2.1 cube new_handlers[new_size - 1] = handler; 452 1.1.2.1 cube 453 1.1.2.1 cube s = splhigh(); 454 1.1.2.1 cube dev->dv_activity_count = new_size; 455 1.1.2.1 cube dev->dv_activity_handlers = new_handlers; 456 1.1.2.1 cube splx(s); 457 1.1.2.1 cube 458 1.1.2.1 cube if (old_handlers != NULL) 459 1.1.2.1 cube free(old_handlers, M_DEVBUF); 460 1.1.2.1 cube 461 1.1.2.1 cube return true; 462 1.1.2.1 cube } 463 1.1.2.1 cube 464 1.1.2.1 cube void 465 1.1.2.1 cube device_active_deregister(device_t dev, void (*handler)(device_t, devactive_t)) 466 1.1.2.1 cube { 467 1.1.2.1 cube void (**new_handlers)(device_t, devactive_t); 468 1.1.2.1 cube void (**old_handlers)(device_t, devactive_t); 469 1.1.2.1 cube size_t i, new_size; 470 1.1.2.1 cube int s; 471 1.1.2.1 cube 472 1.1.2.1 cube old_handlers = dev->dv_activity_handlers; 473 1.1.2.1 cube 474 1.1.2.1 cube for (i = 0; i < dev->dv_activity_count; ++i) { 475 1.1.2.1 cube if (old_handlers[i] == handler) 476 1.1.2.1 cube break; 477 1.1.2.1 cube } 478 1.1.2.1 cube 479 1.1.2.1 cube if (i == dev->dv_activity_count) 480 1.1.2.1 cube return; /* XXX panic? */ 481 1.1.2.1 cube 482 1.1.2.1 cube new_size = dev->dv_activity_count - 1; 483 1.1.2.1 cube 484 1.1.2.1 cube if (new_size == 0) { 485 1.1.2.1 cube new_handlers = NULL; 486 1.1.2.1 cube } else { 487 1.1.2.1 cube new_handlers = malloc(sizeof(void *) * new_size, M_DEVBUF, 488 1.1.2.1 cube M_WAITOK); 489 1.1.2.1 cube memcpy(new_handlers, old_handlers, sizeof(void *) * i); 490 1.1.2.1 cube memcpy(new_handlers + i, old_handlers + i + 1, 491 1.1.2.1 cube sizeof(void *) * (new_size - i)); 492 1.1.2.1 cube } 493 1.1.2.1 cube 494 1.1.2.1 cube s = splhigh(); 495 1.1.2.1 cube dev->dv_activity_count = new_size; 496 1.1.2.1 cube dev->dv_activity_handlers = new_handlers; 497 1.1.2.1 cube splx(s); 498 1.1.2.1 cube 499 1.1.2.1 cube free(old_handlers, M_DEVBUF); 500 1.1.2.1 cube } 501
Indexes created Tue Sep 30 07:10:03 GMT 2025