1154974Smlaier/*- 2178042Ssam * Copyright (c) 2005-2008, Sam Leffler <sam@errno.com> 3154974Smlaier * All rights reserved. 4154974Smlaier * 5154974Smlaier * Redistribution and use in source and binary forms, with or without 6154974Smlaier * modification, are permitted provided that the following conditions 7154974Smlaier * are met: 8154974Smlaier * 1. Redistributions of source code must retain the above copyright 9154974Smlaier * notice unmodified, this list of conditions, and the following 10154974Smlaier * disclaimer. 11154974Smlaier * 2. Redistributions in binary form must reproduce the above copyright 12154974Smlaier * notice, this list of conditions and the following disclaimer in the 13154974Smlaier * documentation and/or other materials provided with the distribution. 14154974Smlaier * 15154974Smlaier * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16154974Smlaier * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17154974Smlaier * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18154974Smlaier * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19154974Smlaier * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20154974Smlaier * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21154974Smlaier * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22154974Smlaier * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23154974Smlaier * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24154974Smlaier * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25154974Smlaier */ 26154974Smlaier 27154974Smlaier#include <sys/cdefs.h> 28154974Smlaier__FBSDID("$FreeBSD$"); 29154974Smlaier 30154974Smlaier#include <sys/param.h> 31154974Smlaier#include <sys/kernel.h> 32154974Smlaier#include <sys/malloc.h> 33154974Smlaier#include <sys/queue.h> 34154974Smlaier#include <sys/taskqueue.h> 35154974Smlaier#include <sys/systm.h> 36154974Smlaier#include <sys/lock.h> 37154974Smlaier#include <sys/mutex.h> 38154974Smlaier#include <sys/errno.h> 39154974Smlaier#include <sys/linker.h> 40154974Smlaier#include <sys/firmware.h> 41164033Srwatson#include <sys/priv.h> 42154974Smlaier#include <sys/proc.h> 43154974Smlaier#include <sys/module.h> 44178042Ssam#include <sys/eventhandler.h> 45154974Smlaier 46178042Ssam#include <sys/filedesc.h> 47178042Ssam#include <sys/vnode.h> 48178042Ssam 49166756Sluigi/* 50166756Sluigi * Loadable firmware support. See sys/sys/firmware.h and firmware(9) 51166756Sluigi * form more details on the subsystem. 52166756Sluigi * 53166756Sluigi * 'struct firmware' is the user-visible part of the firmware table. 54166756Sluigi * Additional internal information is stored in a 'struct priv_fw' 55166756Sluigi * (currently a static array). A slot is in use if FW_INUSE is true: 56166756Sluigi */ 57166756Sluigi 58166756Sluigi#define FW_INUSE(p) ((p)->file != NULL || (p)->fw.name != NULL) 59166756Sluigi 60166756Sluigi/* 61166756Sluigi * fw.name != NULL when an image is registered; file != NULL for 62166756Sluigi * autoloaded images whose handling has not been completed. 63166756Sluigi * 64166756Sluigi * The state of a slot evolves as follows: 65166756Sluigi * firmware_register --> fw.name = image_name 66166756Sluigi * (autoloaded image) --> file = module reference 67166756Sluigi * firmware_unregister --> fw.name = NULL 68166756Sluigi * (unloadentry complete) --> file = NULL 69166756Sluigi * 70166756Sluigi * In order for the above to work, the 'file' field must remain 71166756Sluigi * unchanged in firmware_unregister(). 72166756Sluigi * 73166756Sluigi * Images residing in the same module are linked to each other 74166756Sluigi * through the 'parent' argument of firmware_register(). 75166756Sluigi * One image (typically, one with the same name as the module to let 76166756Sluigi * the autoloading mechanism work) is considered the parent image for 77166756Sluigi * all other images in the same module. Children affect the refcount 78166756Sluigi * on the parent image preventing improper unloading of the image itself. 79166756Sluigi */ 80166756Sluigi 81166756Sluigistruct priv_fw { 82166756Sluigi int refcnt; /* reference count */ 83166756Sluigi 84166756Sluigi /* 85166756Sluigi * parent entry, see above. Set on firmware_register(), 86166756Sluigi * cleared on firmware_unregister(). 87166756Sluigi */ 88166756Sluigi struct priv_fw *parent; 89166756Sluigi 90166756Sluigi int flags; /* record FIRMWARE_UNLOAD requests */ 91166756Sluigi#define FW_UNLOAD 0x100 92166756Sluigi 93166756Sluigi /* 94166756Sluigi * 'file' is private info managed by the autoload/unload code. 95166756Sluigi * Set at the end of firmware_get(), cleared only in the 96178042Ssam * firmware_unload_task, so the latter can depend on its value even 97166756Sluigi * while the lock is not held. 98166756Sluigi */ 99166756Sluigi linker_file_t file; /* module file, if autoloaded */ 100166756Sluigi 101166756Sluigi /* 102166756Sluigi * 'fw' is the externally visible image information. 103166756Sluigi * We do not make it the first field in priv_fw, to avoid the 104166756Sluigi * temptation of casting pointers to each other. 105166756Sluigi * Use PRIV_FW(fw) to get a pointer to the cointainer of fw. 106166756Sluigi * Beware, PRIV_FW does not work for a NULL pointer. 107166756Sluigi */ 108166756Sluigi struct firmware fw; /* externally visible information */ 109166756Sluigi}; 110166756Sluigi 111166756Sluigi/* 112166756Sluigi * PRIV_FW returns the pointer to the container of struct firmware *x. 113166756Sluigi * Cast to intptr_t to override the 'const' attribute of x 114166756Sluigi */ 115166756Sluigi#define PRIV_FW(x) ((struct priv_fw *) \ 116166756Sluigi ((intptr_t)(x) - offsetof(struct priv_fw, fw)) ) 117166756Sluigi 118166756Sluigi/* 119166756Sluigi * At the moment we use a static array as backing store for the registry. 120166756Sluigi * Should we move to a dynamic structure, keep in mind that we cannot 121166756Sluigi * reallocate the array because pointers are held externally. 122166756Sluigi * A list may work, though. 123166756Sluigi */ 124204850Simp#define FIRMWARE_MAX 50 125166756Sluigistatic struct priv_fw firmware_table[FIRMWARE_MAX]; 126166756Sluigi 127166756Sluigi/* 128178042Ssam * Firmware module operations are handled in a separate task as they 129178042Ssam * might sleep and they require directory context to do i/o. 130166756Sluigi */ 131178042Ssamstatic struct taskqueue *firmware_tq; 132178042Ssamstatic struct task firmware_unload_task; 133166756Sluigi 134166756Sluigi/* 135166756Sluigi * This mutex protects accesses to the firmware table. 136166756Sluigi */ 137178042Ssamstatic struct mtx firmware_mtx; 138154974SmlaierMTX_SYSINIT(firmware, &firmware_mtx, "firmware table", MTX_DEF); 139154974Smlaier 140154974Smlaier/* 141166756Sluigi * Helper function to lookup a name. 142166756Sluigi * As a side effect, it sets the pointer to a free slot, if any. 143166756Sluigi * This way we can concentrate most of the registry scanning in 144166756Sluigi * this function, which makes it easier to replace the registry 145166756Sluigi * with some other data structure. 146166756Sluigi */ 147166756Sluigistatic struct priv_fw * 148166756Sluigilookup(const char *name, struct priv_fw **empty_slot) 149166756Sluigi{ 150166756Sluigi struct priv_fw *fp = NULL; 151166756Sluigi struct priv_fw *dummy; 152166756Sluigi int i; 153166756Sluigi 154166756Sluigi if (empty_slot == NULL) 155166756Sluigi empty_slot = &dummy; 156166756Sluigi *empty_slot = NULL; 157166756Sluigi for (i = 0; i < FIRMWARE_MAX; i++) { 158166756Sluigi fp = &firmware_table[i]; 159166756Sluigi if (fp->fw.name != NULL && strcasecmp(name, fp->fw.name) == 0) 160166756Sluigi break; 161166756Sluigi else if (!FW_INUSE(fp)) 162166756Sluigi *empty_slot = fp; 163166756Sluigi } 164166756Sluigi return (i < FIRMWARE_MAX ) ? fp : NULL; 165166756Sluigi} 166166756Sluigi 167166756Sluigi/* 168154974Smlaier * Register a firmware image with the specified name. The 169154974Smlaier * image name must not already be registered. If this is a 170154974Smlaier * subimage then parent refers to a previously registered 171154974Smlaier * image that this should be associated with. 172154974Smlaier */ 173166756Sluigiconst struct firmware * 174154974Smlaierfirmware_register(const char *imagename, const void *data, size_t datasize, 175166756Sluigi unsigned int version, const struct firmware *parent) 176154974Smlaier{ 177166756Sluigi struct priv_fw *match, *frp; 178154974Smlaier 179154974Smlaier mtx_lock(&firmware_mtx); 180166756Sluigi /* 181166756Sluigi * Do a lookup to make sure the name is unique or find a free slot. 182166756Sluigi */ 183166756Sluigi match = lookup(imagename, &frp); 184166756Sluigi if (match != NULL) { 185166756Sluigi mtx_unlock(&firmware_mtx); 186166756Sluigi printf("%s: image %s already registered!\n", 187166756Sluigi __func__, imagename); 188166756Sluigi return NULL; 189154974Smlaier } 190154974Smlaier if (frp == NULL) { 191154974Smlaier mtx_unlock(&firmware_mtx); 192154974Smlaier printf("%s: cannot register image %s, firmware table full!\n", 193154974Smlaier __func__, imagename); 194154974Smlaier return NULL; 195154974Smlaier } 196238013Smarius bzero(frp, sizeof(*frp)); /* start from a clean record */ 197166756Sluigi frp->fw.name = imagename; 198166756Sluigi frp->fw.data = data; 199166756Sluigi frp->fw.datasize = datasize; 200166756Sluigi frp->fw.version = version; 201240472Snp if (parent != NULL) 202166756Sluigi frp->parent = PRIV_FW(parent); 203154974Smlaier mtx_unlock(&firmware_mtx); 204166465Smlaier if (bootverbose) 205166465Smlaier printf("firmware: '%s' version %u: %zu bytes loaded at %p\n", 206166465Smlaier imagename, version, datasize, data); 207166756Sluigi return &frp->fw; 208154974Smlaier} 209154974Smlaier 210154974Smlaier/* 211154974Smlaier * Unregister/remove a firmware image. If there are outstanding 212154974Smlaier * references an error is returned and the image is not removed 213154974Smlaier * from the registry. 214154974Smlaier */ 215154974Smlaierint 216154974Smlaierfirmware_unregister(const char *imagename) 217154974Smlaier{ 218166756Sluigi struct priv_fw *fp; 219166756Sluigi int err; 220154974Smlaier 221154974Smlaier mtx_lock(&firmware_mtx); 222166756Sluigi fp = lookup(imagename, NULL); 223166756Sluigi if (fp == NULL) { 224166756Sluigi /* 225166756Sluigi * It is ok for the lookup to fail; this can happen 226166756Sluigi * when a module is unloaded on last reference and the 227166756Sluigi * module unload handler unregister's each of it's 228166756Sluigi * firmware images. 229166756Sluigi */ 230166756Sluigi err = 0; 231166756Sluigi } else if (fp->refcnt != 0) { /* cannot unregister */ 232166756Sluigi err = EBUSY; 233166756Sluigi } else { 234178042Ssam linker_file_t x = fp->file; /* save value */ 235166756Sluigi 236166756Sluigi /* 237166756Sluigi * Clear the whole entry with bzero to make sure we 238166756Sluigi * do not forget anything. Then restore 'file' which is 239166756Sluigi * non-null for autoloaded images. 240166756Sluigi */ 241166756Sluigi bzero(fp, sizeof(struct priv_fw)); 242166756Sluigi fp->file = x; 243166756Sluigi err = 0; 244154974Smlaier } 245154974Smlaier mtx_unlock(&firmware_mtx); 246166756Sluigi return err; 247154974Smlaier} 248154974Smlaier 249178042Ssamstatic void 250178042Ssamloadimage(void *arg, int npending) 251178042Ssam{ 252178042Ssam struct thread *td = curthread; 253178042Ssam char *imagename = arg; 254178042Ssam struct priv_fw *fp; 255178042Ssam linker_file_t result; 256178042Ssam int error; 257178042Ssam 258178042Ssam /* synchronize with the thread that dispatched us */ 259178042Ssam mtx_lock(&firmware_mtx); 260178042Ssam mtx_unlock(&firmware_mtx); 261178042Ssam 262178042Ssam if (td->td_proc->p_fd->fd_rdir == NULL) { 263178042Ssam printf("%s: root not mounted yet, no way to load image\n", 264178042Ssam imagename); 265178042Ssam goto done; 266178042Ssam } 267178042Ssam error = linker_reference_module(imagename, NULL, &result); 268178042Ssam if (error != 0) { 269178042Ssam printf("%s: could not load firmware image, error %d\n", 270178042Ssam imagename, error); 271178042Ssam goto done; 272178042Ssam } 273178042Ssam 274178042Ssam mtx_lock(&firmware_mtx); 275178042Ssam fp = lookup(imagename, NULL); 276178042Ssam if (fp == NULL || fp->file != NULL) { 277178042Ssam mtx_unlock(&firmware_mtx); 278178042Ssam if (fp == NULL) 279178042Ssam printf("%s: firmware image loaded, " 280178042Ssam "but did not register\n", imagename); 281178042Ssam (void) linker_release_module(imagename, NULL, NULL); 282178042Ssam goto done; 283178042Ssam } 284178042Ssam fp->file = result; /* record the module identity */ 285178042Ssam mtx_unlock(&firmware_mtx); 286178042Ssamdone: 287178042Ssam wakeup_one(imagename); /* we're done */ 288178042Ssam} 289178042Ssam 290154974Smlaier/* 291154974Smlaier * Lookup and potentially load the specified firmware image. 292166756Sluigi * If the firmware is not found in the registry, try to load a kernel 293166756Sluigi * module named as the image name. 294166756Sluigi * If the firmware is located, a reference is returned. The caller must 295166756Sluigi * release this reference for the image to be eligible for removal/unload. 296154974Smlaier */ 297166756Sluigiconst struct firmware * 298154974Smlaierfirmware_get(const char *imagename) 299154974Smlaier{ 300178042Ssam struct task fwload_task; 301154974Smlaier struct thread *td; 302166756Sluigi struct priv_fw *fp; 303154974Smlaier 304154974Smlaier mtx_lock(&firmware_mtx); 305166756Sluigi fp = lookup(imagename, NULL); 306166756Sluigi if (fp != NULL) 307166756Sluigi goto found; 308154974Smlaier /* 309166756Sluigi * Image not present, try to load the module holding it. 310154974Smlaier */ 311154974Smlaier td = curthread; 312164033Srwatson if (priv_check(td, PRIV_FIRMWARE_LOAD) != 0 || 313164033Srwatson securelevel_gt(td->td_ucred, 0) != 0) { 314178042Ssam mtx_unlock(&firmware_mtx); 315154974Smlaier printf("%s: insufficient privileges to " 316154974Smlaier "load firmware image %s\n", __func__, imagename); 317154974Smlaier return NULL; 318154974Smlaier } 319178042Ssam /* 320178042Ssam * Defer load to a thread with known context. linker_reference_module 321178042Ssam * may do filesystem i/o which requires root & current dirs, etc. 322178042Ssam * Also we must not hold any mtx's over this call which is problematic. 323178042Ssam */ 324184842Sgallatin if (!cold) { 325184842Sgallatin TASK_INIT(&fwload_task, 0, loadimage, __DECONST(void *, 326184842Sgallatin imagename)); 327184842Sgallatin taskqueue_enqueue(firmware_tq, &fwload_task); 328184842Sgallatin msleep(__DECONST(void *, imagename), &firmware_mtx, 0, 329184842Sgallatin "fwload", 0); 330184842Sgallatin } 331166756Sluigi /* 332178042Ssam * After attempting to load the module, see if the image is registered. 333166756Sluigi */ 334166756Sluigi fp = lookup(imagename, NULL); 335166756Sluigi if (fp == NULL) { 336154974Smlaier mtx_unlock(&firmware_mtx); 337166756Sluigi return NULL; 338166756Sluigi } 339166756Sluigifound: /* common exit point on success */ 340240472Snp if (fp->refcnt == 0 && fp->parent != NULL) 341240472Snp fp->parent->refcnt++; 342166756Sluigi fp->refcnt++; 343154974Smlaier mtx_unlock(&firmware_mtx); 344166756Sluigi return &fp->fw; 345154974Smlaier} 346154974Smlaier 347154974Smlaier/* 348166756Sluigi * Release a reference to a firmware image returned by firmware_get. 349166756Sluigi * The caller may specify, with the FIRMWARE_UNLOAD flag, its desire 350166756Sluigi * to release the resource, but the flag is only advisory. 351166756Sluigi * 352166756Sluigi * If this is the last reference to the firmware image, and this is an 353178042Ssam * autoloaded module, wake up the firmware_unload_task to figure out 354178042Ssam * what to do with the associated module. 355154974Smlaier */ 356154974Smlaiervoid 357166756Sluigifirmware_put(const struct firmware *p, int flags) 358154974Smlaier{ 359166756Sluigi struct priv_fw *fp = PRIV_FW(p); 360166756Sluigi 361154974Smlaier mtx_lock(&firmware_mtx); 362154974Smlaier fp->refcnt--; 363159486Siedowse if (fp->refcnt == 0) { 364240472Snp if (fp->parent != NULL) 365240472Snp fp->parent->refcnt--; 366166756Sluigi if (flags & FIRMWARE_UNLOAD) 367166756Sluigi fp->flags |= FW_UNLOAD; 368166756Sluigi if (fp->file) 369178042Ssam taskqueue_enqueue(firmware_tq, &firmware_unload_task); 370159486Siedowse } 371154974Smlaier mtx_unlock(&firmware_mtx); 372154974Smlaier} 373154974Smlaier 374154974Smlaier/* 375178042Ssam * Setup directory state for the firmware_tq thread so we can do i/o. 376178042Ssam */ 377178042Ssamstatic void 378178042Ssamset_rootvnode(void *arg, int npending) 379178042Ssam{ 380178042Ssam struct thread *td = curthread; 381178042Ssam struct proc *p = td->td_proc; 382178042Ssam 383178042Ssam FILEDESC_XLOCK(p->p_fd); 384178042Ssam if (p->p_fd->fd_cdir == NULL) { 385178042Ssam p->p_fd->fd_cdir = rootvnode; 386178042Ssam VREF(rootvnode); 387178042Ssam } 388178042Ssam if (p->p_fd->fd_rdir == NULL) { 389178042Ssam p->p_fd->fd_rdir = rootvnode; 390178042Ssam VREF(rootvnode); 391178042Ssam } 392178042Ssam FILEDESC_XUNLOCK(p->p_fd); 393183614Ssam 394183614Ssam free(arg, M_TEMP); 395178042Ssam} 396178042Ssam 397178042Ssam/* 398178042Ssam * Event handler called on mounting of /; bounce a task 399178042Ssam * into the task queue thread to setup it's directories. 400178042Ssam */ 401178042Ssamstatic void 402178042Ssamfirmware_mountroot(void *arg) 403178042Ssam{ 404183614Ssam struct task *setroot_task; 405178042Ssam 406183614Ssam setroot_task = malloc(sizeof(struct task), M_TEMP, M_NOWAIT); 407183614Ssam if (setroot_task != NULL) { 408183614Ssam TASK_INIT(setroot_task, 0, set_rootvnode, setroot_task); 409183614Ssam taskqueue_enqueue(firmware_tq, setroot_task); 410183614Ssam } else 411183614Ssam printf("%s: no memory for task!\n", __func__); 412178042Ssam} 413178042SsamEVENTHANDLER_DEFINE(mountroot, firmware_mountroot, NULL, 0); 414178042Ssam 415178042Ssam/* 416166756Sluigi * The body of the task in charge of unloading autoloaded modules 417166756Sluigi * that are not needed anymore. 418166756Sluigi * Images can be cross-linked so we may need to make multiple passes, 419166756Sluigi * but the time we spend in the loop is bounded because we clear entries 420166756Sluigi * as we touch them. 421166756Sluigi */ 422166756Sluigistatic void 423166756Sluigiunloadentry(void *unused1, int unused2) 424166756Sluigi{ 425166756Sluigi int limit = FIRMWARE_MAX; 426166756Sluigi int i; /* current cycle */ 427166756Sluigi 428166756Sluigi mtx_lock(&firmware_mtx); 429166756Sluigi /* 430166756Sluigi * Scan the table. limit is set to make sure we make another 431166756Sluigi * full sweep after matching an entry that requires unloading. 432166756Sluigi */ 433166756Sluigi for (i = 0; i < limit; i++) { 434166756Sluigi struct priv_fw *fp; 435166756Sluigi int err; 436166756Sluigi 437166756Sluigi fp = &firmware_table[i % FIRMWARE_MAX]; 438166756Sluigi if (fp->fw.name == NULL || fp->file == NULL || 439166756Sluigi fp->refcnt != 0 || (fp->flags & FW_UNLOAD) == 0) 440166756Sluigi continue; 441166756Sluigi 442166756Sluigi /* 443166756Sluigi * Found an entry. Now: 444166756Sluigi * 1. bump up limit to make sure we make another full round; 445166756Sluigi * 2. clear FW_UNLOAD so we don't try this entry again. 446166756Sluigi * 3. release the lock while trying to unload the module. 447166756Sluigi * 'file' remains set so that the entry cannot be reused 448166756Sluigi * in the meantime (it also means that fp->file will 449166756Sluigi * not change while we release the lock). 450166756Sluigi */ 451166756Sluigi limit = i + FIRMWARE_MAX; /* make another full round */ 452166756Sluigi fp->flags &= ~FW_UNLOAD; /* do not try again */ 453166756Sluigi 454166756Sluigi mtx_unlock(&firmware_mtx); 455166756Sluigi err = linker_release_module(NULL, NULL, fp->file); 456166756Sluigi mtx_lock(&firmware_mtx); 457166756Sluigi 458166756Sluigi /* 459166756Sluigi * We rely on the module to call firmware_unregister() 460166756Sluigi * on unload to actually release the entry. 461166756Sluigi * If err = 0 we can drop our reference as the system 462166756Sluigi * accepted it. Otherwise unloading failed (e.g. the 463166756Sluigi * module itself gave an error) so our reference is 464166756Sluigi * still valid. 465166756Sluigi */ 466166756Sluigi if (err == 0) 467166756Sluigi fp->file = NULL; 468166756Sluigi } 469166756Sluigi mtx_unlock(&firmware_mtx); 470166756Sluigi} 471166756Sluigi 472166756Sluigi/* 473154974Smlaier * Module glue. 474154974Smlaier */ 475154974Smlaierstatic int 476154974Smlaierfirmware_modevent(module_t mod, int type, void *unused) 477154974Smlaier{ 478166756Sluigi struct priv_fw *fp; 479178042Ssam int i, err; 480159486Siedowse 481154974Smlaier switch (type) { 482154974Smlaier case MOD_LOAD: 483178042Ssam TASK_INIT(&firmware_unload_task, 0, unloadentry, NULL); 484178042Ssam firmware_tq = taskqueue_create("taskqueue_firmware", M_WAITOK, 485178042Ssam taskqueue_thread_enqueue, &firmware_tq); 486178042Ssam /* NB: use our own loop routine that sets up context */ 487178042Ssam (void) taskqueue_start_threads(&firmware_tq, 1, PWAIT, 488178042Ssam "firmware taskq"); 489178042Ssam if (rootvnode != NULL) { 490178042Ssam /* 491178042Ssam * Root is already mounted so we won't get an event; 492178042Ssam * simulate one here. 493178042Ssam */ 494178042Ssam firmware_mountroot(NULL); 495178042Ssam } 496154974Smlaier return 0; 497166756Sluigi 498154974Smlaier case MOD_UNLOAD: 499166756Sluigi /* request all autoloaded modules to be released */ 500166756Sluigi mtx_lock(&firmware_mtx); 501159486Siedowse for (i = 0; i < FIRMWARE_MAX; i++) { 502159589Sjhb fp = &firmware_table[i]; 503201758Smbr fp->flags |= FW_UNLOAD; 504159486Siedowse } 505166756Sluigi mtx_unlock(&firmware_mtx); 506178042Ssam taskqueue_enqueue(firmware_tq, &firmware_unload_task); 507178042Ssam taskqueue_drain(firmware_tq, &firmware_unload_task); 508178042Ssam err = 0; 509166756Sluigi for (i = 0; i < FIRMWARE_MAX; i++) { 510166756Sluigi fp = &firmware_table[i]; 511166756Sluigi if (fp->fw.name != NULL) { 512166756Sluigi printf("%s: image %p ref %d still active slot %d\n", 513166756Sluigi __func__, fp->fw.name, 514166756Sluigi fp->refcnt, i); 515166756Sluigi err = EINVAL; 516166756Sluigi } 517166756Sluigi } 518178042Ssam if (err == 0) 519178042Ssam taskqueue_free(firmware_tq); 520166756Sluigi return err; 521154974Smlaier } 522154974Smlaier return EINVAL; 523154974Smlaier} 524154974Smlaier 525154974Smlaierstatic moduledata_t firmware_mod = { 526154974Smlaier "firmware", 527154974Smlaier firmware_modevent, 528188057Simp NULL 529154974Smlaier}; 530154974SmlaierDECLARE_MODULE(firmware, firmware_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 531154974SmlaierMODULE_VERSION(firmware, 1); 532