1 /* 2 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org 3 * 4 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. 5 * All Rights Reserved. 6 * 7 * Author Rickard E. (Rik) Faith <faith@valinux.com> 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the next 17 * paragraph) shall be included in all copies or substantial portions of the 18 * Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 26 * DEALINGS IN THE SOFTWARE. 27 */ 28 29 #include <linux/module.h> 30 #include <linux/moduleparam.h> 31 #include <drm/drmP.h> 32 #include <drm/drm_core.h> 33 #include "drm_legacy.h" 34 #include "drm_internal.h" 35 36 /* Provides three levels of debug: off, minimal, verbose */ 37 #ifdef __DragonFly__ 38 #if DRM_DEBUG_DEFAULT_ON == 1 39 #define DRM_DEBUGBITS_ON (DRM_UT_CORE | DRM_UT_DRIVER | DRM_UT_KMS | \ 40 DRM_UT_PRIME| DRM_UT_ATOMIC | DRM_UT_FIOCTL) 41 #elif DRM_DEBUG_DEFAULT_ON == 2 42 #define DRM_DEBUGBITS_ON (DRM_UT_CORE | DRM_UT_DRIVER | DRM_UT_KMS | \ 43 DRM_UT_PRIME| DRM_UT_ATOMIC | DRM_UT_FIOCTL | \ 44 DRM_UT_PID | DRM_UT_IOCTL | DRM_UT_VBLANK) 45 #else 46 #define DRM_DEBUGBITS_ON (0x0) 47 #endif 48 unsigned int drm_debug = DRM_DEBUGBITS_ON; /* defaults to 0 */ 49 #else 50 unsigned int drm_debug = 0; /* bitmask of DRM_UT_x */ 51 #endif /* __DragonFly__ */ 52 EXPORT_SYMBOL(drm_debug); 53 54 MODULE_AUTHOR(CORE_AUTHOR); 55 MODULE_DESCRIPTION(CORE_DESC); 56 MODULE_PARM_DESC(debug, "Enable debug output"); 57 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)"); 58 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); 59 MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); 60 61 module_param_named(debug, drm_debug, int, 0600); 62 63 #if 0 64 static DEFINE_SPINLOCK(drm_minor_lock); 65 static struct idr drm_minors_idr; 66 #endif 67 68 #if 0 69 static struct dentry *drm_debugfs_root; 70 #endif 71 72 void drm_err(const char *func, const char *format, ...) 73 { 74 __va_list args; 75 76 kprintf("error: [" DRM_NAME ":pid%d:%s] *ERROR* ", DRM_CURRENTPID, func); 77 78 __va_start(args, format); 79 kvprintf(format, args); 80 __va_end(args); 81 } 82 EXPORT_SYMBOL(drm_err); 83 84 void drm_ut_debug_printk(const char *function_name, const char *format, ...) 85 { 86 __va_list args; 87 88 if (unlikely(drm_debug & DRM_UT_PID)) { 89 kprintf("[" DRM_NAME ":pid%d:%s] ", 90 DRM_CURRENTPID, function_name); 91 } else { 92 kprintf("[" DRM_NAME ":%s] ", function_name); 93 } 94 95 __va_start(args, format); 96 kvprintf(format, args); 97 __va_end(args); 98 } 99 EXPORT_SYMBOL(drm_ut_debug_printk); 100 101 #if 0 102 struct drm_master *drm_master_create(struct drm_minor *minor) 103 { 104 struct drm_master *master; 105 106 master = kzalloc(sizeof(*master), GFP_KERNEL); 107 if (!master) 108 return NULL; 109 110 kref_init(&master->refcount); 111 spin_lock_init(&master->lock.spinlock); 112 init_waitqueue_head(&master->lock.lock_queue); 113 if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { 114 kfree(master); 115 return NULL; 116 } 117 master->minor = minor; 118 119 return master; 120 } 121 122 struct drm_master *drm_master_get(struct drm_master *master) 123 { 124 kref_get(&master->refcount); 125 return master; 126 } 127 EXPORT_SYMBOL(drm_master_get); 128 129 static void drm_master_destroy(struct kref *kref) 130 { 131 struct drm_master *master = container_of(kref, struct drm_master, refcount); 132 struct drm_device *dev = master->minor->dev; 133 struct drm_map_list *r_list, *list_temp; 134 135 mutex_lock(&dev->struct_mutex); 136 if (dev->driver->master_destroy) 137 dev->driver->master_destroy(dev, master); 138 139 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { 140 if (r_list->master == master) { 141 drm_legacy_rmmap_locked(dev, r_list->map); 142 r_list = NULL; 143 } 144 } 145 146 if (master->unique) { 147 kfree(master->unique); 148 master->unique = NULL; 149 master->unique_len = 0; 150 } 151 152 drm_ht_remove(&master->magiclist); 153 154 mutex_unlock(&dev->struct_mutex); 155 kfree(master); 156 } 157 158 void drm_master_put(struct drm_master **master) 159 { 160 kref_put(&(*master)->refcount, drm_master_destroy); 161 *master = NULL; 162 } 163 EXPORT_SYMBOL(drm_master_put); 164 #endif 165 166 int drm_setmaster_ioctl(struct drm_device *dev, void *data, 167 struct drm_file *file_priv) 168 { 169 DRM_DEBUG("setmaster\n"); 170 171 if (file_priv->master != 0) 172 return (0); 173 174 return (-EPERM); 175 } 176 177 int drm_dropmaster_ioctl(struct drm_device *dev, void *data, 178 struct drm_file *file_priv) 179 { 180 DRM_DEBUG("dropmaster\n"); 181 if (file_priv->master != 0) 182 return -EINVAL; 183 return 0; 184 } 185 186 #if 0 187 /* 188 * DRM Minors 189 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each 190 * of them is represented by a drm_minor object. Depending on the capabilities 191 * of the device-driver, different interfaces are registered. 192 * 193 * Minors can be accessed via dev->$minor_name. This pointer is either 194 * NULL or a valid drm_minor pointer and stays valid as long as the device is 195 * valid. This means, DRM minors have the same life-time as the underlying 196 * device. However, this doesn't mean that the minor is active. Minors are 197 * registered and unregistered dynamically according to device-state. 198 */ 199 200 static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, 201 unsigned int type) 202 { 203 switch (type) { 204 case DRM_MINOR_LEGACY: 205 return &dev->primary; 206 case DRM_MINOR_RENDER: 207 return &dev->render; 208 case DRM_MINOR_CONTROL: 209 return &dev->control; 210 default: 211 return NULL; 212 } 213 } 214 215 static int drm_minor_alloc(struct drm_device *dev, unsigned int type) 216 { 217 struct drm_minor *minor; 218 unsigned long flags; 219 int r; 220 221 minor = kzalloc(sizeof(*minor), GFP_KERNEL); 222 if (!minor) 223 return -ENOMEM; 224 225 minor->type = type; 226 minor->dev = dev; 227 228 idr_preload(GFP_KERNEL); 229 spin_lock_irqsave(&drm_minor_lock, flags); 230 r = idr_alloc(&drm_minors_idr, 231 NULL, 232 64 * type, 233 64 * (type + 1), 234 GFP_NOWAIT); 235 spin_unlock_irqrestore(&drm_minor_lock, flags); 236 idr_preload_end(); 237 238 if (r < 0) 239 goto err_free; 240 241 minor->index = r; 242 243 minor->kdev = drm_sysfs_minor_alloc(minor); 244 if (IS_ERR(minor->kdev)) { 245 r = PTR_ERR(minor->kdev); 246 goto err_index; 247 } 248 249 *drm_minor_get_slot(dev, type) = minor; 250 return 0; 251 252 err_index: 253 spin_lock_irqsave(&drm_minor_lock, flags); 254 idr_remove(&drm_minors_idr, minor->index); 255 spin_unlock_irqrestore(&drm_minor_lock, flags); 256 err_free: 257 kfree(minor); 258 return r; 259 } 260 261 static void drm_minor_free(struct drm_device *dev, unsigned int type) 262 { 263 struct drm_minor **slot, *minor; 264 unsigned long flags; 265 266 slot = drm_minor_get_slot(dev, type); 267 minor = *slot; 268 if (!minor) 269 return; 270 271 put_device(minor->kdev); 272 273 spin_lock_irqsave(&drm_minor_lock, flags); 274 idr_remove(&drm_minors_idr, minor->index); 275 spin_unlock_irqrestore(&drm_minor_lock, flags); 276 277 kfree(minor); 278 *slot = NULL; 279 } 280 281 static int drm_minor_register(struct drm_device *dev, unsigned int type) 282 { 283 struct drm_minor *minor; 284 unsigned long flags; 285 int ret; 286 287 DRM_DEBUG("\n"); 288 289 minor = *drm_minor_get_slot(dev, type); 290 if (!minor) 291 return 0; 292 293 ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); 294 if (ret) { 295 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); 296 return ret; 297 } 298 299 ret = device_add(minor->kdev); 300 if (ret) 301 goto err_debugfs; 302 303 /* replace NULL with @minor so lookups will succeed from now on */ 304 spin_lock_irqsave(&drm_minor_lock, flags); 305 idr_replace(&drm_minors_idr, minor, minor->index); 306 spin_unlock_irqrestore(&drm_minor_lock, flags); 307 308 DRM_DEBUG("new minor registered %d\n", minor->index); 309 return 0; 310 311 err_debugfs: 312 drm_debugfs_cleanup(minor); 313 return ret; 314 } 315 316 static void drm_minor_unregister(struct drm_device *dev, unsigned int type) 317 { 318 struct drm_minor *minor; 319 unsigned long flags; 320 321 minor = *drm_minor_get_slot(dev, type); 322 if (!minor || !device_is_registered(minor->kdev)) 323 return; 324 325 /* replace @minor with NULL so lookups will fail from now on */ 326 spin_lock_irqsave(&drm_minor_lock, flags); 327 idr_replace(&drm_minors_idr, NULL, minor->index); 328 spin_unlock_irqrestore(&drm_minor_lock, flags); 329 330 device_del(minor->kdev); 331 dev_set_drvdata(minor->kdev, NULL); /* safety belt */ 332 drm_debugfs_cleanup(minor); 333 } 334 335 /** 336 * drm_minor_acquire - Acquire a DRM minor 337 * @minor_id: Minor ID of the DRM-minor 338 * 339 * Looks up the given minor-ID and returns the respective DRM-minor object. The 340 * refence-count of the underlying device is increased so you must release this 341 * object with drm_minor_release(). 342 * 343 * As long as you hold this minor, it is guaranteed that the object and the 344 * minor->dev pointer will stay valid! However, the device may get unplugged and 345 * unregistered while you hold the minor. 346 * 347 * Returns: 348 * Pointer to minor-object with increased device-refcount, or PTR_ERR on 349 * failure. 350 */ 351 struct drm_minor *drm_minor_acquire(unsigned int minor_id) 352 { 353 struct drm_minor *minor; 354 unsigned long flags; 355 356 spin_lock_irqsave(&drm_minor_lock, flags); 357 minor = idr_find(&drm_minors_idr, minor_id); 358 if (minor) 359 drm_dev_ref(minor->dev); 360 spin_unlock_irqrestore(&drm_minor_lock, flags); 361 362 if (!minor) { 363 return ERR_PTR(-ENODEV); 364 } else if (drm_device_is_unplugged(minor->dev)) { 365 drm_dev_unref(minor->dev); 366 return ERR_PTR(-ENODEV); 367 } 368 369 return minor; 370 } 371 372 /** 373 * drm_minor_release - Release DRM minor 374 * @minor: Pointer to DRM minor object 375 * 376 * Release a minor that was previously acquired via drm_minor_acquire(). 377 */ 378 void drm_minor_release(struct drm_minor *minor) 379 { 380 drm_dev_unref(minor->dev); 381 } 382 383 /** 384 * DOC: driver instance overview 385 * 386 * A device instance for a drm driver is represented by struct &drm_device. This 387 * is allocated with drm_dev_alloc(), usually from bus-specific ->probe() 388 * callbacks implemented by the driver. The driver then needs to initialize all 389 * the various subsystems for the drm device like memory management, vblank 390 * handling, modesetting support and intial output configuration plus obviously 391 * initialize all the corresponding hardware bits. An important part of this is 392 * also calling drm_dev_set_unique() to set the userspace-visible unique name of 393 * this device instance. Finally when everything is up and running and ready for 394 * userspace the device instance can be published using drm_dev_register(). 395 * 396 * There is also deprecated support for initalizing device instances using 397 * bus-specific helpers and the ->load() callback. But due to 398 * backwards-compatibility needs the device instance have to be published too 399 * early, which requires unpretty global locking to make safe and is therefore 400 * only support for existing drivers not yet converted to the new scheme. 401 * 402 * When cleaning up a device instance everything needs to be done in reverse: 403 * First unpublish the device instance with drm_dev_unregister(). Then clean up 404 * any other resources allocated at device initialization and drop the driver's 405 * reference to &drm_device using drm_dev_unref(). 406 * 407 * Note that the lifetime rules for &drm_device instance has still a lot of 408 * historical baggage. Hence use the reference counting provided by 409 * drm_dev_ref() and drm_dev_unref() only carefully. 410 * 411 * Also note that embedding of &drm_device is currently not (yet) supported (but 412 * it would be easy to add). Drivers can store driver-private data in the 413 * dev_priv field of &drm_device. 414 */ 415 416 /** 417 * drm_put_dev - Unregister and release a DRM device 418 * @dev: DRM device 419 * 420 * Called at module unload time or when a PCI device is unplugged. 421 * 422 * Cleans up all DRM device, calling drm_lastclose(). 423 * 424 * Note: Use of this function is deprecated. It will eventually go away 425 * completely. Please use drm_dev_unregister() and drm_dev_unref() explicitly 426 * instead to make sure that the device isn't userspace accessible any more 427 * while teardown is in progress, ensuring that userspace can't access an 428 * inconsistent state. 429 */ 430 void drm_put_dev(struct drm_device *dev) 431 { 432 DRM_DEBUG("\n"); 433 434 if (!dev) { 435 DRM_ERROR("cleanup called no dev\n"); 436 return; 437 } 438 439 drm_dev_unregister(dev); 440 drm_dev_unref(dev); 441 } 442 EXPORT_SYMBOL(drm_put_dev); 443 444 void drm_unplug_dev(struct drm_device *dev) 445 { 446 /* for a USB device */ 447 drm_minor_unregister(dev, DRM_MINOR_LEGACY); 448 drm_minor_unregister(dev, DRM_MINOR_RENDER); 449 drm_minor_unregister(dev, DRM_MINOR_CONTROL); 450 451 mutex_lock(&drm_global_mutex); 452 453 drm_device_set_unplugged(dev); 454 455 if (dev->open_count == 0) { 456 drm_put_dev(dev); 457 } 458 mutex_unlock(&drm_global_mutex); 459 } 460 EXPORT_SYMBOL(drm_unplug_dev); 461 462 /* 463 * DRM internal mount 464 * We want to be able to allocate our own "struct address_space" to control 465 * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow 466 * stand-alone address_space objects, so we need an underlying inode. As there 467 * is no way to allocate an independent inode easily, we need a fake internal 468 * VFS mount-point. 469 * 470 * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() 471 * frees it again. You are allowed to use iget() and iput() to get references to 472 * the inode. But each drm_fs_inode_new() call must be paired with exactly one 473 * drm_fs_inode_free() call (which does not have to be the last iput()). 474 * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it 475 * between multiple inode-users. You could, technically, call 476 * iget() + drm_fs_inode_free() directly after alloc and sometime later do an 477 * iput(), but this way you'd end up with a new vfsmount for each inode. 478 */ 479 480 static int drm_fs_cnt; 481 static struct vfsmount *drm_fs_mnt; 482 483 static const struct dentry_operations drm_fs_dops = { 484 .d_dname = simple_dname, 485 }; 486 487 static const struct super_operations drm_fs_sops = { 488 .statfs = simple_statfs, 489 }; 490 491 static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, 492 const char *dev_name, void *data) 493 { 494 return mount_pseudo(fs_type, 495 "drm:", 496 &drm_fs_sops, 497 &drm_fs_dops, 498 0x010203ff); 499 } 500 501 static struct file_system_type drm_fs_type = { 502 .name = "drm", 503 .owner = THIS_MODULE, 504 .mount = drm_fs_mount, 505 .kill_sb = kill_anon_super, 506 }; 507 508 static struct inode *drm_fs_inode_new(void) 509 { 510 struct inode *inode; 511 int r; 512 513 r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); 514 if (r < 0) { 515 DRM_ERROR("Cannot mount pseudo fs: %d\n", r); 516 return ERR_PTR(r); 517 } 518 519 inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); 520 if (IS_ERR(inode)) 521 simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); 522 523 return inode; 524 } 525 526 static void drm_fs_inode_free(struct inode *inode) 527 { 528 if (inode) { 529 iput(inode); 530 simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); 531 } 532 } 533 534 /** 535 * drm_dev_alloc - Allocate new DRM device 536 * @driver: DRM driver to allocate device for 537 * @parent: Parent device object 538 * 539 * Allocate and initialize a new DRM device. No device registration is done. 540 * Call drm_dev_register() to advertice the device to user space and register it 541 * with other core subsystems. This should be done last in the device 542 * initialization sequence to make sure userspace can't access an inconsistent 543 * state. 544 * 545 * The initial ref-count of the object is 1. Use drm_dev_ref() and 546 * drm_dev_unref() to take and drop further ref-counts. 547 * 548 * Note that for purely virtual devices @parent can be NULL. 549 * 550 * RETURNS: 551 * Pointer to new DRM device, or NULL if out of memory. 552 */ 553 struct drm_device *drm_dev_alloc(struct drm_driver *driver, 554 struct device *parent) 555 { 556 struct drm_device *dev; 557 int ret; 558 559 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 560 if (!dev) 561 return NULL; 562 563 kref_init(&dev->ref); 564 dev->dev = parent; 565 dev->driver = driver; 566 567 INIT_LIST_HEAD(&dev->filelist); 568 INIT_LIST_HEAD(&dev->ctxlist); 569 INIT_LIST_HEAD(&dev->vmalist); 570 INIT_LIST_HEAD(&dev->maplist); 571 INIT_LIST_HEAD(&dev->vblank_event_list); 572 573 spin_lock_init(&dev->buf_lock); 574 spin_lock_init(&dev->event_lock); 575 mutex_init(&dev->struct_mutex); 576 mutex_init(&dev->ctxlist_mutex); 577 mutex_init(&dev->master_mutex); 578 579 dev->anon_inode = drm_fs_inode_new(); 580 if (IS_ERR(dev->anon_inode)) { 581 ret = PTR_ERR(dev->anon_inode); 582 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); 583 goto err_free; 584 } 585 586 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 587 ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); 588 if (ret) 589 goto err_minors; 590 591 WARN_ON(driver->suspend || driver->resume); 592 } 593 594 if (drm_core_check_feature(dev, DRIVER_RENDER)) { 595 ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); 596 if (ret) 597 goto err_minors; 598 } 599 600 ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); 601 if (ret) 602 goto err_minors; 603 604 if (drm_ht_create(&dev->map_hash, 12)) 605 goto err_minors; 606 607 drm_legacy_ctxbitmap_init(dev); 608 609 if (drm_core_check_feature(dev, DRIVER_GEM)) { 610 ret = drm_gem_init(dev); 611 if (ret) { 612 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); 613 goto err_ctxbitmap; 614 } 615 } 616 617 return dev; 618 619 err_ctxbitmap: 620 drm_legacy_ctxbitmap_cleanup(dev); 621 drm_ht_remove(&dev->map_hash); 622 err_minors: 623 drm_minor_free(dev, DRM_MINOR_LEGACY); 624 drm_minor_free(dev, DRM_MINOR_RENDER); 625 drm_minor_free(dev, DRM_MINOR_CONTROL); 626 drm_fs_inode_free(dev->anon_inode); 627 err_free: 628 mutex_destroy(&dev->master_mutex); 629 kfree(dev); 630 return NULL; 631 } 632 EXPORT_SYMBOL(drm_dev_alloc); 633 634 static void drm_dev_release(struct kref *ref) 635 { 636 struct drm_device *dev = container_of(ref, struct drm_device, ref); 637 638 if (drm_core_check_feature(dev, DRIVER_GEM)) 639 drm_gem_destroy(dev); 640 641 drm_legacy_ctxbitmap_cleanup(dev); 642 drm_ht_remove(&dev->map_hash); 643 drm_fs_inode_free(dev->anon_inode); 644 645 drm_minor_free(dev, DRM_MINOR_LEGACY); 646 drm_minor_free(dev, DRM_MINOR_RENDER); 647 drm_minor_free(dev, DRM_MINOR_CONTROL); 648 649 mutex_destroy(&dev->master_mutex); 650 kfree(dev->unique); 651 kfree(dev); 652 } 653 654 /** 655 * drm_dev_ref - Take reference of a DRM device 656 * @dev: device to take reference of or NULL 657 * 658 * This increases the ref-count of @dev by one. You *must* already own a 659 * reference when calling this. Use drm_dev_unref() to drop this reference 660 * again. 661 * 662 * This function never fails. However, this function does not provide *any* 663 * guarantee whether the device is alive or running. It only provides a 664 * reference to the object and the memory associated with it. 665 */ 666 void drm_dev_ref(struct drm_device *dev) 667 { 668 if (dev) 669 kref_get(&dev->ref); 670 } 671 EXPORT_SYMBOL(drm_dev_ref); 672 673 /** 674 * drm_dev_unref - Drop reference of a DRM device 675 * @dev: device to drop reference of or NULL 676 * 677 * This decreases the ref-count of @dev by one. The device is destroyed if the 678 * ref-count drops to zero. 679 */ 680 void drm_dev_unref(struct drm_device *dev) 681 { 682 if (dev) 683 kref_put(&dev->ref, drm_dev_release); 684 } 685 EXPORT_SYMBOL(drm_dev_unref); 686 687 /** 688 * drm_dev_register - Register DRM device 689 * @dev: Device to register 690 * @flags: Flags passed to the driver's .load() function 691 * 692 * Register the DRM device @dev with the system, advertise device to user-space 693 * and start normal device operation. @dev must be allocated via drm_dev_alloc() 694 * previously. 695 * 696 * Never call this twice on any device! 697 * 698 * NOTE: To ensure backward compatibility with existing drivers method this 699 * function calls the ->load() method after registering the device nodes, 700 * creating race conditions. Usage of the ->load() methods is therefore 701 * deprecated, drivers must perform all initialization before calling 702 * drm_dev_register(). 703 * 704 * RETURNS: 705 * 0 on success, negative error code on failure. 706 */ 707 int drm_dev_register(struct drm_device *dev, unsigned long flags) 708 { 709 int ret; 710 711 mutex_lock(&drm_global_mutex); 712 713 ret = drm_minor_register(dev, DRM_MINOR_CONTROL); 714 if (ret) 715 goto err_minors; 716 717 ret = drm_minor_register(dev, DRM_MINOR_RENDER); 718 if (ret) 719 goto err_minors; 720 721 ret = drm_minor_register(dev, DRM_MINOR_LEGACY); 722 if (ret) 723 goto err_minors; 724 725 if (dev->driver->load) { 726 ret = dev->driver->load(dev, flags); 727 if (ret) 728 goto err_minors; 729 } 730 731 ret = 0; 732 goto out_unlock; 733 734 err_minors: 735 drm_minor_unregister(dev, DRM_MINOR_LEGACY); 736 drm_minor_unregister(dev, DRM_MINOR_RENDER); 737 drm_minor_unregister(dev, DRM_MINOR_CONTROL); 738 out_unlock: 739 mutex_unlock(&drm_global_mutex); 740 return ret; 741 } 742 EXPORT_SYMBOL(drm_dev_register); 743 744 /** 745 * drm_dev_unregister - Unregister DRM device 746 * @dev: Device to unregister 747 * 748 * Unregister the DRM device from the system. This does the reverse of 749 * drm_dev_register() but does not deallocate the device. The caller must call 750 * drm_dev_unref() to drop their final reference. 751 * 752 * This should be called first in the device teardown code to make sure 753 * userspace can't access the device instance any more. 754 */ 755 void drm_dev_unregister(struct drm_device *dev) 756 { 757 struct drm_map_list *r_list, *list_temp; 758 759 drm_lastclose(dev); 760 761 if (dev->driver->unload) 762 dev->driver->unload(dev); 763 764 if (dev->agp) 765 drm_pci_agp_destroy(dev); 766 767 drm_vblank_cleanup(dev); 768 769 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) 770 drm_legacy_rmmap(dev, r_list->map); 771 772 drm_minor_unregister(dev, DRM_MINOR_LEGACY); 773 drm_minor_unregister(dev, DRM_MINOR_RENDER); 774 drm_minor_unregister(dev, DRM_MINOR_CONTROL); 775 } 776 EXPORT_SYMBOL(drm_dev_unregister); 777 778 /** 779 * drm_dev_set_unique - Set the unique name of a DRM device 780 * @dev: device of which to set the unique name 781 * @fmt: format string for unique name 782 * 783 * Sets the unique name of a DRM device using the specified format string and 784 * a variable list of arguments. Drivers can use this at driver probe time if 785 * the unique name of the devices they drive is static. 786 * 787 * Return: 0 on success or a negative error code on failure. 788 */ 789 int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) 790 { 791 va_list ap; 792 793 kfree(dev->unique); 794 795 va_start(ap, fmt); 796 dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); 797 va_end(ap); 798 799 return dev->unique ? 0 : -ENOMEM; 800 } 801 EXPORT_SYMBOL(drm_dev_set_unique); 802 #endif 803 804 /* 805 * DRM Core 806 * The DRM core module initializes all global DRM objects and makes them 807 * available to drivers. Once setup, drivers can probe their respective 808 * devices. 809 * Currently, core management includes: 810 * - The "DRM-Global" key/value database 811 * - Global ID management for connectors 812 * - DRM major number allocation 813 * - DRM minor management 814 * - DRM sysfs class 815 * - DRM debugfs root 816 * 817 * Furthermore, the DRM core provides dynamic char-dev lookups. For each 818 * interface registered on a DRM device, you can request minor numbers from DRM 819 * core. DRM core takes care of major-number management and char-dev 820 * registration. A stub ->open() callback forwards any open() requests to the 821 * registered minor. 822 */ 823 824 #if 0 825 static int drm_stub_open(struct inode *inode, struct file *filp) 826 { 827 const struct file_operations *new_fops; 828 struct drm_minor *minor; 829 int err; 830 831 DRM_DEBUG("\n"); 832 833 mutex_lock(&drm_global_mutex); 834 minor = drm_minor_acquire(iminor(inode)); 835 if (IS_ERR(minor)) { 836 err = PTR_ERR(minor); 837 goto out_unlock; 838 } 839 840 new_fops = fops_get(minor->dev->driver->fops); 841 if (!new_fops) { 842 err = -ENODEV; 843 goto out_release; 844 } 845 846 replace_fops(filp, new_fops); 847 if (filp->f_op->open) 848 err = filp->f_op->open(inode, filp); 849 else 850 err = 0; 851 852 out_release: 853 drm_minor_release(minor); 854 out_unlock: 855 mutex_unlock(&drm_global_mutex); 856 return err; 857 } 858 859 static const struct file_operations drm_stub_fops = { 860 .owner = THIS_MODULE, 861 .open = drm_stub_open, 862 .llseek = noop_llseek, 863 }; 864 865 static int __init drm_core_init(void) 866 { 867 int ret = -ENOMEM; 868 869 drm_global_init(); 870 drm_connector_ida_init(); 871 idr_init(&drm_minors_idr); 872 873 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) 874 goto err_p1; 875 876 ret = drm_sysfs_init(); 877 if (ret < 0) { 878 printk(KERN_ERR "DRM: Error creating drm class.\n"); 879 goto err_p2; 880 } 881 882 drm_debugfs_root = debugfs_create_dir("dri", NULL); 883 if (!drm_debugfs_root) { 884 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); 885 ret = -1; 886 goto err_p3; 887 } 888 889 DRM_INFO("Initialized %s %d.%d.%d %s\n", 890 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 891 return 0; 892 err_p3: 893 drm_sysfs_destroy(); 894 err_p2: 895 unregister_chrdev(DRM_MAJOR, "drm"); 896 897 idr_destroy(&drm_minors_idr); 898 err_p1: 899 return ret; 900 } 901 902 static void __exit drm_core_exit(void) 903 { 904 debugfs_remove(drm_debugfs_root); 905 drm_sysfs_destroy(); 906 907 unregister_chrdev(DRM_MAJOR, "drm"); 908 909 drm_connector_ida_destroy(); 910 idr_destroy(&drm_minors_idr); 911 } 912 913 module_init(drm_core_init); 914 module_exit(drm_core_exit); 915 #endif 916 917 #include <sys/devfs.h> 918 919 #include <linux/export.h> 920 #include <linux/dmi.h> 921 #include <drm/drmP.h> 922 #include <drm/drm_core.h> 923 924 static int drm_load(struct drm_device *dev); 925 drm_pci_id_list_t *drm_find_description(int vendor, int device, 926 drm_pci_id_list_t *idlist); 927 928 #define DRIVER_SOFTC(unit) \ 929 ((struct drm_device *)devclass_get_softc(drm_devclass, unit)) 930 931 static int 932 drm_modevent(module_t mod, int type, void *data) 933 { 934 935 switch (type) { 936 case MOD_LOAD: 937 TUNABLE_INT_FETCH("drm.debug", &drm_debug); 938 break; 939 } 940 return (0); 941 } 942 943 static moduledata_t drm_mod = { 944 "drm", 945 drm_modevent, 946 0 947 }; 948 DECLARE_MODULE(drm, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 949 MODULE_VERSION(drm, 1); 950 MODULE_DEPEND(drm, agp, 1, 1, 1); 951 MODULE_DEPEND(drm, pci, 1, 1, 1); 952 MODULE_DEPEND(drm, iicbus, 1, 1, 1); 953 954 static struct dev_ops drm_cdevsw = { 955 { "drm", 0, D_TRACKCLOSE | D_MPSAFE }, 956 .d_open = drm_open, 957 .d_close = drm_close, 958 .d_read = drm_read, 959 .d_ioctl = drm_ioctl, 960 .d_kqfilter = drm_kqfilter, 961 .d_mmap = drm_mmap, 962 .d_mmap_single = drm_mmap_single, 963 }; 964 965 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device"); 966 SYSCTL_INT(_hw_drm, OID_AUTO, debug, CTLFLAG_RW, &drm_debug, 0, 967 "DRM debugging"); 968 969 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist) 970 { 971 drm_pci_id_list_t *id_entry; 972 int vendor, device; 973 974 vendor = pci_get_vendor(kdev); 975 device = pci_get_device(kdev); 976 977 if (pci_get_class(kdev) != PCIC_DISPLAY) 978 return ENXIO; 979 980 id_entry = drm_find_description(vendor, device, idlist); 981 if (id_entry != NULL) { 982 if (!device_get_desc(kdev)) { 983 device_set_desc(kdev, id_entry->name); 984 DRM_DEBUG("desc : %s\n", device_get_desc(kdev)); 985 } 986 return 0; 987 } 988 989 return ENXIO; 990 } 991 992 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist) 993 { 994 struct drm_device *dev; 995 drm_pci_id_list_t *id_entry; 996 int unit, error; 997 u_int irq_flags; 998 int msi_enable; 999 1000 unit = device_get_unit(kdev); 1001 dev = device_get_softc(kdev); 1002 1003 /* Initialize Linux struct device */ 1004 dev->dev = kzalloc(sizeof(struct device), GFP_KERNEL); 1005 1006 if (!strcmp(device_get_name(kdev), "drmsub")) 1007 dev->dev->bsddev = device_get_parent(kdev); 1008 else 1009 dev->dev->bsddev = kdev; 1010 1011 dev->pci_domain = pci_get_domain(dev->dev->bsddev); 1012 dev->pci_bus = pci_get_bus(dev->dev->bsddev); 1013 dev->pci_slot = pci_get_slot(dev->dev->bsddev); 1014 dev->pci_func = pci_get_function(dev->dev->bsddev); 1015 drm_init_pdev(dev->dev->bsddev, &dev->pdev); 1016 1017 id_entry = drm_find_description(dev->pdev->vendor, 1018 dev->pdev->device, idlist); 1019 dev->id_entry = id_entry; 1020 1021 if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) { 1022 msi_enable = 1; 1023 1024 dev->irq_type = pci_alloc_1intr(dev->dev->bsddev, msi_enable, 1025 &dev->irqrid, &irq_flags); 1026 1027 dev->irqr = bus_alloc_resource_any(dev->dev->bsddev, SYS_RES_IRQ, 1028 &dev->irqrid, irq_flags); 1029 1030 if (!dev->irqr) { 1031 return (ENOENT); 1032 } 1033 1034 dev->irq = (int) rman_get_start(dev->irqr); 1035 dev->pdev->irq = dev->irq; /* for i915 */ 1036 } 1037 1038 /* Print the contents of pdev struct. */ 1039 drm_print_pdev(dev->pdev); 1040 1041 lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE); 1042 lwkt_serialize_init(&dev->irq_lock); 1043 lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE); 1044 lockinit(&dev->struct_mutex, "drmslk", 0, LK_CANRECURSE); 1045 1046 error = drm_load(dev); 1047 if (error) 1048 goto error; 1049 1050 error = drm_create_cdevs(kdev); 1051 if (error) 1052 goto error; 1053 1054 return (error); 1055 error: 1056 if (dev->irqr) { 1057 bus_release_resource(dev->dev->bsddev, SYS_RES_IRQ, 1058 dev->irqrid, dev->irqr); 1059 } 1060 if (dev->irq_type == PCI_INTR_TYPE_MSI) { 1061 pci_release_msi(dev->dev->bsddev); 1062 } 1063 return (error); 1064 } 1065 1066 int 1067 drm_create_cdevs(device_t kdev) 1068 { 1069 struct drm_device *dev; 1070 int error, unit; 1071 1072 unit = device_get_unit(kdev); 1073 dev = device_get_softc(kdev); 1074 1075 dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID, 1076 DRM_DEV_MODE, "dri/card%d", unit); 1077 error = 0; 1078 if (error == 0) 1079 dev->devnode->si_drv1 = dev; 1080 return (error); 1081 } 1082 1083 #ifndef DRM_DEV_NAME 1084 #define DRM_DEV_NAME "drm" 1085 #endif 1086 1087 devclass_t drm_devclass; 1088 1089 drm_pci_id_list_t *drm_find_description(int vendor, int device, 1090 drm_pci_id_list_t *idlist) 1091 { 1092 int i = 0; 1093 1094 for (i = 0; idlist[i].vendor != 0; i++) { 1095 if ((idlist[i].vendor == vendor) && 1096 ((idlist[i].device == device) || 1097 (idlist[i].device == 0))) { 1098 return &idlist[i]; 1099 } 1100 } 1101 return NULL; 1102 } 1103 1104 static int drm_load(struct drm_device *dev) 1105 { 1106 int i, retcode; 1107 1108 DRM_DEBUG("\n"); 1109 1110 INIT_LIST_HEAD(&dev->maplist); 1111 1112 drm_sysctl_init(dev); 1113 INIT_LIST_HEAD(&dev->filelist); 1114 1115 dev->counters = 6; 1116 dev->types[0] = _DRM_STAT_LOCK; 1117 dev->types[1] = _DRM_STAT_OPENS; 1118 dev->types[2] = _DRM_STAT_CLOSES; 1119 dev->types[3] = _DRM_STAT_IOCTLS; 1120 dev->types[4] = _DRM_STAT_LOCKS; 1121 dev->types[5] = _DRM_STAT_UNLOCKS; 1122 1123 for (i = 0; i < ARRAY_SIZE(dev->counts); i++) 1124 atomic_set(&dev->counts[i], 0); 1125 1126 INIT_LIST_HEAD(&dev->vblank_event_list); 1127 1128 if (drm_core_check_feature(dev, DRIVER_USE_AGP)) { 1129 if (drm_pci_device_is_agp(dev)) 1130 dev->agp = drm_agp_init(dev); 1131 } 1132 1133 if (dev->driver->driver_features & DRIVER_GEM) { 1134 retcode = drm_gem_init(dev); 1135 if (retcode != 0) { 1136 DRM_ERROR("Cannot initialize graphics execution " 1137 "manager (GEM)\n"); 1138 goto error1; 1139 } 1140 } 1141 1142 if (dev->driver->load != NULL) { 1143 DRM_LOCK(dev); 1144 /* Shared code returns -errno. */ 1145 retcode = -dev->driver->load(dev, 1146 dev->id_entry->driver_private); 1147 if (pci_enable_busmaster(dev->dev->bsddev)) 1148 DRM_ERROR("Request to enable bus-master failed.\n"); 1149 DRM_UNLOCK(dev); 1150 if (retcode != 0) 1151 goto error1; 1152 } 1153 1154 DRM_INFO("Initialized %s %d.%d.%d %s\n", 1155 dev->driver->name, 1156 dev->driver->major, 1157 dev->driver->minor, 1158 dev->driver->patchlevel, 1159 dev->driver->date); 1160 1161 return 0; 1162 1163 error1: 1164 drm_gem_destroy(dev); 1165 drm_sysctl_cleanup(dev); 1166 DRM_LOCK(dev); 1167 drm_lastclose(dev); 1168 DRM_UNLOCK(dev); 1169 if (dev->devnode != NULL) 1170 destroy_dev(dev->devnode); 1171 1172 lockuninit(&dev->vbl_lock); 1173 lockuninit(&dev->dev_lock); 1174 lockuninit(&dev->event_lock); 1175 lockuninit(&dev->struct_mutex); 1176 1177 return retcode; 1178 } 1179 1180 /* 1181 * Stub is needed for devfs 1182 */ 1183 int drm_close(struct dev_close_args *ap) 1184 { 1185 return 0; 1186 } 1187 1188 void drm_cdevpriv_dtor(void *cd) 1189 { 1190 struct drm_file *file_priv = cd; 1191 struct drm_device *dev = file_priv->dev; 1192 int retcode = 0; 1193 1194 DRM_DEBUG("open_count = %d\n", dev->open_count); 1195 1196 DRM_LOCK(dev); 1197 1198 if (dev->driver->preclose != NULL) 1199 dev->driver->preclose(dev, file_priv); 1200 1201 /* ======================================================== 1202 * Begin inline drm_release 1203 */ 1204 1205 DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", 1206 DRM_CURRENTPID, (long)dev->dev, dev->open_count); 1207 1208 if (dev->driver->driver_features & DRIVER_GEM) 1209 drm_gem_release(dev, file_priv); 1210 1211 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && 1212 !dev->driver->reclaim_buffers_locked) 1213 drm_legacy_reclaim_buffers(dev, file_priv); 1214 1215 funsetown(&dev->buf_sigio); 1216 1217 if (dev->driver->postclose != NULL) 1218 dev->driver->postclose(dev, file_priv); 1219 list_del(&file_priv->lhead); 1220 1221 1222 /* ======================================================== 1223 * End inline drm_release 1224 */ 1225 1226 atomic_inc(&dev->counts[_DRM_STAT_CLOSES]); 1227 device_unbusy(dev->dev->bsddev); 1228 if (--dev->open_count == 0) { 1229 retcode = drm_lastclose(dev); 1230 } 1231 1232 DRM_UNLOCK(dev); 1233 } 1234 1235 int 1236 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx, 1237 struct sysctl_oid *top) 1238 { 1239 struct sysctl_oid *oid; 1240 1241 ksnprintf(dev->busid_str, sizeof(dev->busid_str), 1242 "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus, 1243 dev->pci_slot, dev->pci_func); 1244 oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid", 1245 CTLFLAG_RD, dev->busid_str, 0, NULL); 1246 if (oid == NULL) 1247 return (ENOMEM); 1248 dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0; 1249 oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO, 1250 "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL); 1251 if (oid == NULL) 1252 return (ENOMEM); 1253 1254 return (0); 1255 } 1256 1257 int 1258 drm_mmap_single(struct dev_mmap_single_args *ap) 1259 { 1260 struct drm_device *dev; 1261 struct cdev *kdev = ap->a_head.a_dev; 1262 vm_ooffset_t *offset = ap->a_offset; 1263 vm_size_t size = ap->a_size; 1264 struct vm_object **obj_res = ap->a_object; 1265 int nprot = ap->a_nprot; 1266 1267 dev = drm_get_device_from_kdev(kdev); 1268 if (dev->drm_ttm_bdev != NULL) { 1269 return (ttm_bo_mmap_single(dev->drm_ttm_bdev, offset, size, 1270 obj_res, nprot)); 1271 } else if ((dev->driver->driver_features & DRIVER_GEM) != 0) { 1272 return (drm_gem_mmap_single(dev, offset, size, obj_res, nprot)); 1273 } else { 1274 return (ENODEV); 1275 } 1276 } 1277 1278 /* XXX broken code */ 1279 #if DRM_LINUX 1280 1281 #include <sys/sysproto.h> 1282 1283 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1); 1284 1285 #define LINUX_IOCTL_DRM_MIN 0x6400 1286 #define LINUX_IOCTL_DRM_MAX 0x64ff 1287 1288 static linux_ioctl_function_t drm_linux_ioctl; 1289 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl, 1290 LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX}; 1291 1292 /* The bits for in/out are switched on Linux */ 1293 #define LINUX_IOC_IN IOC_OUT 1294 #define LINUX_IOC_OUT IOC_IN 1295 1296 static int 1297 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args) 1298 { 1299 int error; 1300 int cmd = args->cmd; 1301 1302 args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT); 1303 if (cmd & LINUX_IOC_IN) 1304 args->cmd |= IOC_IN; 1305 if (cmd & LINUX_IOC_OUT) 1306 args->cmd |= IOC_OUT; 1307 1308 error = ioctl(p, (struct ioctl_args *)args); 1309 1310 return error; 1311 } 1312 #endif /* DRM_LINUX */ 1313 1314 static int 1315 drm_core_init(void *arg) 1316 { 1317 1318 drm_global_init(); 1319 1320 #if DRM_LINUX 1321 linux_ioctl_register_handler(&drm_handler); 1322 #endif /* DRM_LINUX */ 1323 1324 DRM_INFO("Initialized %s %d.%d.%d %s\n", 1325 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 1326 return 0; 1327 } 1328 1329 static void 1330 drm_core_exit(void *arg) 1331 { 1332 1333 #if DRM_LINUX 1334 linux_ioctl_unregister_handler(&drm_handler); 1335 #endif /* DRM_LINUX */ 1336 1337 drm_global_release(); 1338 } 1339 1340 SYSINIT(drm_register, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, 1341 drm_core_init, NULL); 1342 SYSUNINIT(drm_unregister, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, 1343 drm_core_exit, NULL); 1344 1345 1346 #include <linux/dmi.h> 1347 1348 /* 1349 * Check if dmi_system_id structure matches system DMI data 1350 */ 1351 static bool 1352 dmi_found(const struct dmi_system_id *dsi) 1353 { 1354 int i, slot; 1355 bool found = false; 1356 char *sys_vendor, *board_vendor, *product_name, *board_name; 1357 1358 sys_vendor = kgetenv("smbios.system.maker"); 1359 board_vendor = kgetenv("smbios.planar.maker"); 1360 product_name = kgetenv("smbios.system.product"); 1361 board_name = kgetenv("smbios.planar.product"); 1362 1363 for (i = 0; i < NELEM(dsi->matches); i++) { 1364 slot = dsi->matches[i].slot; 1365 switch (slot) { 1366 case DMI_NONE: 1367 break; 1368 case DMI_SYS_VENDOR: 1369 if (sys_vendor != NULL && 1370 !strcmp(sys_vendor, dsi->matches[i].substr)) 1371 break; 1372 else 1373 goto done; 1374 case DMI_BOARD_VENDOR: 1375 if (board_vendor != NULL && 1376 !strcmp(board_vendor, dsi->matches[i].substr)) 1377 break; 1378 else 1379 goto done; 1380 case DMI_PRODUCT_NAME: 1381 if (product_name != NULL && 1382 !strcmp(product_name, dsi->matches[i].substr)) 1383 break; 1384 else 1385 goto done; 1386 case DMI_BOARD_NAME: 1387 if (board_name != NULL && 1388 !strcmp(board_name, dsi->matches[i].substr)) 1389 break; 1390 else 1391 goto done; 1392 default: 1393 goto done; 1394 } 1395 } 1396 found = true; 1397 1398 done: 1399 if (sys_vendor != NULL) 1400 kfreeenv(sys_vendor); 1401 if (board_vendor != NULL) 1402 kfreeenv(board_vendor); 1403 if (product_name != NULL) 1404 kfreeenv(product_name); 1405 if (board_name != NULL) 1406 kfreeenv(board_name); 1407 1408 return found; 1409 } 1410 1411 int dmi_check_system(const struct dmi_system_id *sysid) 1412 { 1413 const struct dmi_system_id *dsi; 1414 int num = 0; 1415 1416 for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) { 1417 if (dmi_found(dsi)) { 1418 num++; 1419 if (dsi->callback && dsi->callback(dsi)) 1420 break; 1421 } 1422 } 1423 return (num); 1424 } 1425