| 1 | /** |
| 2 | * \file drm_stub.h |
| 3 | * Stub support |
| 4 | * |
| 5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
| 10 | * |
| 11 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
| 12 | * All Rights Reserved. |
| 13 | * |
| 14 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 15 | * copy of this software and associated documentation files (the "Software"), |
| 16 | * to deal in the Software without restriction, including without limitation |
| 17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 18 | * and/or sell copies of the Software, and to permit persons to whom the |
| 19 | * Software is furnished to do so, subject to the following conditions: |
| 20 | * |
| 21 | * The above copyright notice and this permission notice (including the next |
| 22 | * paragraph) shall be included in all copies or substantial portions of the |
| 23 | * Software. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 31 | * DEALINGS IN THE SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | #include <linux/err.h> |
| 35 | #include <linux/export.h> |
| 36 | #include <linux/fs.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/moduleparam.h> |
| 39 | #include <linux/mount.h> |
| 40 | #include <linux/printk.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <drm/drmP.h> |
| 43 | #include <drm/drm_core.h> |
| 44 | |
| 45 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
| 46 | EXPORT_SYMBOL(drm_debug); |
| 47 | |
| 48 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
| 49 | EXPORT_SYMBOL(drm_rnodes); |
| 50 | |
| 51 | /* 1 to allow user space to request universal planes (experimental) */ |
| 52 | unsigned int drm_universal_planes = 0; |
| 53 | EXPORT_SYMBOL(drm_universal_planes); |
| 54 | |
| 55 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
| 56 | EXPORT_SYMBOL(drm_vblank_offdelay); |
| 57 | |
| 58 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
| 59 | EXPORT_SYMBOL(drm_timestamp_precision); |
| 60 | |
| 61 | /* |
| 62 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
| 63 | * complete events. |
| 64 | */ |
| 65 | unsigned int drm_timestamp_monotonic = 1; |
| 66 | |
| 67 | MODULE_AUTHOR(CORE_AUTHOR); |
| 68 | MODULE_DESCRIPTION(CORE_DESC); |
| 69 | MODULE_LICENSE("GPL and additional rights" ); |
| 70 | MODULE_PARM_DESC(debug, "Enable debug output" ); |
| 71 | MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API" ); |
| 72 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]" ); |
| 73 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]" ); |
| 74 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps" ); |
| 75 | |
| 76 | module_param_named(debug, drm_debug, int, 0600); |
| 77 | module_param_named(rnodes, drm_rnodes, int, 0600); |
| 78 | module_param_named(universal_planes, drm_universal_planes, int, 0600); |
| 79 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
| 80 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
| 81 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
| 82 | |
| 83 | #ifdef __NetBSD__ |
| 84 | spinlock_t drm_minor_lock; |
| 85 | #else |
| 86 | static DEFINE_SPINLOCK(drm_minor_lock); |
| 87 | #endif |
| 88 | struct idr drm_minors_idr; |
| 89 | |
| 90 | #ifndef __NetBSD__ |
| 91 | struct class *drm_class; |
| 92 | struct dentry *drm_debugfs_root; |
| 93 | #endif |
| 94 | |
| 95 | int drm_err(const char *func, const char *format, ...) |
| 96 | { |
| 97 | #ifdef __NetBSD__ |
| 98 | va_list args; |
| 99 | |
| 100 | va_start(args, format); |
| 101 | printf("DRM error in %s: " , func); |
| 102 | vprintf(format, args); |
| 103 | va_end(args); |
| 104 | |
| 105 | return 0; |
| 106 | #else |
| 107 | struct va_format vaf; |
| 108 | va_list args; |
| 109 | int r; |
| 110 | |
| 111 | va_start(args, format); |
| 112 | |
| 113 | vaf.fmt = format; |
| 114 | vaf.va = &args; |
| 115 | |
| 116 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV" , func, &vaf); |
| 117 | |
| 118 | va_end(args); |
| 119 | |
| 120 | return r; |
| 121 | #endif |
| 122 | } |
| 123 | EXPORT_SYMBOL(drm_err); |
| 124 | |
| 125 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
| 126 | { |
| 127 | #ifdef __NetBSD__ |
| 128 | va_list args; |
| 129 | |
| 130 | va_start(args, format); |
| 131 | printf("DRM debug in %s: " , function_name); |
| 132 | vprintf(format, args); |
| 133 | va_end(args); |
| 134 | #else |
| 135 | struct va_format vaf; |
| 136 | va_list args; |
| 137 | |
| 138 | va_start(args, format); |
| 139 | vaf.fmt = format; |
| 140 | vaf.va = &args; |
| 141 | |
| 142 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV" , function_name, &vaf); |
| 143 | |
| 144 | va_end(args); |
| 145 | #endif |
| 146 | } |
| 147 | EXPORT_SYMBOL(drm_ut_debug_printk); |
| 148 | |
| 149 | struct drm_master *drm_master_create(struct drm_minor *minor) |
| 150 | { |
| 151 | struct drm_master *master; |
| 152 | |
| 153 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
| 154 | if (!master) |
| 155 | return NULL; |
| 156 | |
| 157 | kref_init(&master->refcount); |
| 158 | spin_lock_init(&master->lock.spinlock); |
| 159 | #ifdef __NetBSD__ |
| 160 | DRM_INIT_WAITQUEUE(&master->lock.lock_queue, "drmlockq" ); |
| 161 | #else |
| 162 | init_waitqueue_head(&master->lock.lock_queue); |
| 163 | #endif |
| 164 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); |
| 165 | INIT_LIST_HEAD(&master->magicfree); |
| 166 | master->minor = minor; |
| 167 | |
| 168 | return master; |
| 169 | } |
| 170 | |
| 171 | struct drm_master *drm_master_get(struct drm_master *master) |
| 172 | { |
| 173 | kref_get(&master->refcount); |
| 174 | return master; |
| 175 | } |
| 176 | EXPORT_SYMBOL(drm_master_get); |
| 177 | |
| 178 | static void drm_master_destroy(struct kref *kref) |
| 179 | { |
| 180 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
| 181 | struct drm_magic_entry *pt, *next; |
| 182 | struct drm_device *dev = master->minor->dev; |
| 183 | struct drm_map_list *r_list, *list_temp; |
| 184 | |
| 185 | mutex_lock(&dev->struct_mutex); |
| 186 | if (dev->driver->master_destroy) |
| 187 | dev->driver->master_destroy(dev, master); |
| 188 | |
| 189 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
| 190 | if (r_list->master == master) { |
| 191 | drm_rmmap_locked(dev, r_list->map); |
| 192 | r_list = NULL; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | if (master->unique) { |
| 197 | kfree(master->unique); |
| 198 | master->unique = NULL; |
| 199 | master->unique_len = 0; |
| 200 | } |
| 201 | |
| 202 | kfree(dev->devname); |
| 203 | dev->devname = NULL; |
| 204 | |
| 205 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
| 206 | list_del(&pt->head); |
| 207 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
| 208 | kfree(pt); |
| 209 | } |
| 210 | |
| 211 | drm_ht_remove(&master->magiclist); |
| 212 | |
| 213 | #ifdef __NetBSD__ |
| 214 | spin_lock_destroy(&master->lock.spinlock); |
| 215 | DRM_DESTROY_WAITQUEUE(&master->lock.lock_queue); |
| 216 | #endif |
| 217 | |
| 218 | mutex_unlock(&dev->struct_mutex); |
| 219 | kfree(master); |
| 220 | } |
| 221 | |
| 222 | void drm_master_put(struct drm_master **master) |
| 223 | { |
| 224 | kref_put(&(*master)->refcount, drm_master_destroy); |
| 225 | *master = NULL; |
| 226 | } |
| 227 | EXPORT_SYMBOL(drm_master_put); |
| 228 | |
| 229 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
| 230 | struct drm_file *file_priv) |
| 231 | { |
| 232 | int ret = 0; |
| 233 | |
| 234 | mutex_lock(&dev->master_mutex); |
| 235 | if (file_priv->is_master) |
| 236 | goto out_unlock; |
| 237 | |
| 238 | if (file_priv->minor->master) { |
| 239 | ret = -EINVAL; |
| 240 | goto out_unlock; |
| 241 | } |
| 242 | |
| 243 | if (!file_priv->master) { |
| 244 | ret = -EINVAL; |
| 245 | goto out_unlock; |
| 246 | } |
| 247 | |
| 248 | file_priv->minor->master = drm_master_get(file_priv->master); |
| 249 | file_priv->is_master = 1; |
| 250 | if (dev->driver->master_set) { |
| 251 | ret = dev->driver->master_set(dev, file_priv, false); |
| 252 | if (unlikely(ret != 0)) { |
| 253 | file_priv->is_master = 0; |
| 254 | drm_master_put(&file_priv->minor->master); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | out_unlock: |
| 259 | mutex_unlock(&dev->master_mutex); |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
| 264 | struct drm_file *file_priv) |
| 265 | { |
| 266 | int ret = -EINVAL; |
| 267 | |
| 268 | mutex_lock(&dev->master_mutex); |
| 269 | if (!file_priv->is_master) |
| 270 | goto out_unlock; |
| 271 | |
| 272 | if (!file_priv->minor->master) |
| 273 | goto out_unlock; |
| 274 | |
| 275 | ret = 0; |
| 276 | if (dev->driver->master_drop) |
| 277 | dev->driver->master_drop(dev, file_priv, false); |
| 278 | drm_master_put(&file_priv->minor->master); |
| 279 | file_priv->is_master = 0; |
| 280 | |
| 281 | out_unlock: |
| 282 | mutex_unlock(&dev->master_mutex); |
| 283 | return ret; |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * DRM Minors |
| 288 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each |
| 289 | * of them is represented by a drm_minor object. Depending on the capabilities |
| 290 | * of the device-driver, different interfaces are registered. |
| 291 | * |
| 292 | * Minors can be accessed via dev->$minor_name. This pointer is either |
| 293 | * NULL or a valid drm_minor pointer and stays valid as long as the device is |
| 294 | * valid. This means, DRM minors have the same life-time as the underlying |
| 295 | * device. However, this doesn't mean that the minor is active. Minors are |
| 296 | * registered and unregistered dynamically according to device-state. |
| 297 | */ |
| 298 | |
| 299 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
| 300 | unsigned int type) |
| 301 | { |
| 302 | switch (type) { |
| 303 | case DRM_MINOR_LEGACY: |
| 304 | return &dev->primary; |
| 305 | case DRM_MINOR_RENDER: |
| 306 | return &dev->render; |
| 307 | case DRM_MINOR_CONTROL: |
| 308 | return &dev->control; |
| 309 | default: |
| 310 | return NULL; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
| 315 | { |
| 316 | struct drm_minor *minor; |
| 317 | |
| 318 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
| 319 | if (!minor) |
| 320 | return -ENOMEM; |
| 321 | |
| 322 | minor->type = type; |
| 323 | minor->dev = dev; |
| 324 | |
| 325 | *drm_minor_get_slot(dev, type) = minor; |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
| 330 | { |
| 331 | struct drm_minor **slot; |
| 332 | |
| 333 | slot = drm_minor_get_slot(dev, type); |
| 334 | if (*slot) { |
| 335 | kfree(*slot); |
| 336 | *slot = NULL; |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
| 341 | { |
| 342 | struct drm_minor *new_minor; |
| 343 | unsigned long flags; |
| 344 | #ifndef __NetBSD__ |
| 345 | int ret; |
| 346 | #endif |
| 347 | int minor_id; |
| 348 | |
| 349 | DRM_DEBUG("\n" ); |
| 350 | |
| 351 | new_minor = *drm_minor_get_slot(dev, type); |
| 352 | if (!new_minor) |
| 353 | return 0; |
| 354 | |
| 355 | idr_preload(GFP_KERNEL); |
| 356 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 357 | minor_id = idr_alloc(&drm_minors_idr, |
| 358 | NULL, |
| 359 | 64 * type, |
| 360 | 64 * (type + 1), |
| 361 | GFP_NOWAIT); |
| 362 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 363 | idr_preload_end(); |
| 364 | |
| 365 | if (minor_id < 0) |
| 366 | return minor_id; |
| 367 | |
| 368 | new_minor->index = minor_id; |
| 369 | |
| 370 | #ifndef __NetBSD__ |
| 371 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
| 372 | if (ret) { |
| 373 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n" ); |
| 374 | goto err_id; |
| 375 | } |
| 376 | |
| 377 | ret = drm_sysfs_device_add(new_minor); |
| 378 | if (ret) { |
| 379 | DRM_ERROR("DRM: Error sysfs_device_add.\n" ); |
| 380 | goto err_debugfs; |
| 381 | } |
| 382 | #endif |
| 383 | /* replace NULL with @minor so lookups will succeed from now on */ |
| 384 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 385 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); |
| 386 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 387 | |
| 388 | DRM_DEBUG("new minor assigned %d\n" , minor_id); |
| 389 | return 0; |
| 390 | |
| 391 | #ifndef __NetBSD__ |
| 392 | err_debugfs: |
| 393 | drm_debugfs_cleanup(new_minor); |
| 394 | err_id: |
| 395 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 396 | idr_remove(&drm_minors_idr, minor_id); |
| 397 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 398 | new_minor->index = 0; |
| 399 | return ret; |
| 400 | #endif |
| 401 | } |
| 402 | |
| 403 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
| 404 | { |
| 405 | struct drm_minor *minor; |
| 406 | unsigned long flags; |
| 407 | |
| 408 | minor = *drm_minor_get_slot(dev, type); |
| 409 | if (!minor || !minor->kdev) |
| 410 | return; |
| 411 | |
| 412 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 413 | idr_remove(&drm_minors_idr, minor->index); |
| 414 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 415 | minor->index = 0; |
| 416 | |
| 417 | drm_debugfs_cleanup(minor); |
| 418 | drm_sysfs_device_remove(minor); |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * drm_minor_acquire - Acquire a DRM minor |
| 423 | * @minor_id: Minor ID of the DRM-minor |
| 424 | * |
| 425 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
| 426 | * refence-count of the underlying device is increased so you must release this |
| 427 | * object with drm_minor_release(). |
| 428 | * |
| 429 | * As long as you hold this minor, it is guaranteed that the object and the |
| 430 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
| 431 | * unregistered while you hold the minor. |
| 432 | * |
| 433 | * Returns: |
| 434 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
| 435 | * failure. |
| 436 | */ |
| 437 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
| 438 | { |
| 439 | struct drm_minor *minor; |
| 440 | unsigned long flags; |
| 441 | |
| 442 | spin_lock_irqsave(&drm_minor_lock, flags); |
| 443 | minor = idr_find(&drm_minors_idr, minor_id); |
| 444 | if (minor) |
| 445 | drm_dev_ref(minor->dev); |
| 446 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
| 447 | |
| 448 | if (!minor) { |
| 449 | return ERR_PTR(-ENODEV); |
| 450 | } else if (drm_device_is_unplugged(minor->dev)) { |
| 451 | drm_dev_unref(minor->dev); |
| 452 | return ERR_PTR(-ENODEV); |
| 453 | } |
| 454 | |
| 455 | return minor; |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * drm_minor_release - Release DRM minor |
| 460 | * @minor: Pointer to DRM minor object |
| 461 | * |
| 462 | * Release a minor that was previously acquired via drm_minor_acquire(). |
| 463 | */ |
| 464 | void drm_minor_release(struct drm_minor *minor) |
| 465 | { |
| 466 | drm_dev_unref(minor->dev); |
| 467 | } |
| 468 | |
| 469 | /** |
| 470 | * Called via drm_exit() at module unload time or when pci device is |
| 471 | * unplugged. |
| 472 | * |
| 473 | * Cleans up all DRM device, calling drm_lastclose(). |
| 474 | * |
| 475 | */ |
| 476 | void drm_put_dev(struct drm_device *dev) |
| 477 | { |
| 478 | DRM_DEBUG("\n" ); |
| 479 | |
| 480 | if (!dev) { |
| 481 | DRM_ERROR("cleanup called no dev\n" ); |
| 482 | return; |
| 483 | } |
| 484 | |
| 485 | drm_dev_unregister(dev); |
| 486 | drm_dev_unref(dev); |
| 487 | } |
| 488 | EXPORT_SYMBOL(drm_put_dev); |
| 489 | |
| 490 | void drm_unplug_dev(struct drm_device *dev) |
| 491 | { |
| 492 | /* for a USB device */ |
| 493 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 494 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 495 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
| 496 | |
| 497 | mutex_lock(&drm_global_mutex); |
| 498 | drm_device_set_unplugged(dev); |
| 499 | |
| 500 | if (dev->open_count == 0) { |
| 501 | drm_put_dev(dev); |
| 502 | } |
| 503 | mutex_unlock(&drm_global_mutex); |
| 504 | } |
| 505 | EXPORT_SYMBOL(drm_unplug_dev); |
| 506 | |
| 507 | #ifdef __NetBSD__ |
| 508 | |
| 509 | struct inode; |
| 510 | |
| 511 | static struct inode * |
| 512 | drm_fs_inode_new(void) |
| 513 | { |
| 514 | return NULL; |
| 515 | } |
| 516 | |
| 517 | static void |
| 518 | drm_fs_inode_free(struct inode *inode) |
| 519 | { |
| 520 | KASSERT(inode == NULL); |
| 521 | } |
| 522 | |
| 523 | #else |
| 524 | |
| 525 | /* |
| 526 | * DRM internal mount |
| 527 | * We want to be able to allocate our own "struct address_space" to control |
| 528 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow |
| 529 | * stand-alone address_space objects, so we need an underlying inode. As there |
| 530 | * is no way to allocate an independent inode easily, we need a fake internal |
| 531 | * VFS mount-point. |
| 532 | * |
| 533 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() |
| 534 | * frees it again. You are allowed to use iget() and iput() to get references to |
| 535 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one |
| 536 | * drm_fs_inode_free() call (which does not have to be the last iput()). |
| 537 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it |
| 538 | * between multiple inode-users. You could, technically, call |
| 539 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an |
| 540 | * iput(), but this way you'd end up with a new vfsmount for each inode. |
| 541 | */ |
| 542 | |
| 543 | static int drm_fs_cnt; |
| 544 | static struct vfsmount *drm_fs_mnt; |
| 545 | |
| 546 | static const struct dentry_operations drm_fs_dops = { |
| 547 | .d_dname = simple_dname, |
| 548 | }; |
| 549 | |
| 550 | static const struct super_operations drm_fs_sops = { |
| 551 | .statfs = simple_statfs, |
| 552 | }; |
| 553 | |
| 554 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, |
| 555 | const char *dev_name, void *data) |
| 556 | { |
| 557 | return mount_pseudo(fs_type, |
| 558 | "drm:" , |
| 559 | &drm_fs_sops, |
| 560 | &drm_fs_dops, |
| 561 | 0x010203ff); |
| 562 | } |
| 563 | |
| 564 | static struct file_system_type drm_fs_type = { |
| 565 | .name = "drm" , |
| 566 | .owner = THIS_MODULE, |
| 567 | .mount = drm_fs_mount, |
| 568 | .kill_sb = kill_anon_super, |
| 569 | }; |
| 570 | |
| 571 | static struct inode *drm_fs_inode_new(void) |
| 572 | { |
| 573 | struct inode *inode; |
| 574 | int r; |
| 575 | |
| 576 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); |
| 577 | if (r < 0) { |
| 578 | DRM_ERROR("Cannot mount pseudo fs: %d\n" , r); |
| 579 | return ERR_PTR(r); |
| 580 | } |
| 581 | |
| 582 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); |
| 583 | if (IS_ERR(inode)) |
| 584 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
| 585 | |
| 586 | return inode; |
| 587 | } |
| 588 | |
| 589 | static void drm_fs_inode_free(struct inode *inode) |
| 590 | { |
| 591 | if (inode) { |
| 592 | iput(inode); |
| 593 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | #endif |
| 598 | |
| 599 | /** |
| 600 | * drm_dev_alloc - Allocate new drm device |
| 601 | * @driver: DRM driver to allocate device for |
| 602 | * @parent: Parent device object |
| 603 | * |
| 604 | * Allocate and initialize a new DRM device. No device registration is done. |
| 605 | * Call drm_dev_register() to advertice the device to user space and register it |
| 606 | * with other core subsystems. |
| 607 | * |
| 608 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
| 609 | * drm_dev_unref() to take and drop further ref-counts. |
| 610 | * |
| 611 | * RETURNS: |
| 612 | * Pointer to new DRM device, or NULL if out of memory. |
| 613 | */ |
| 614 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, |
| 615 | struct device *parent) |
| 616 | { |
| 617 | struct drm_device *dev; |
| 618 | int ret; |
| 619 | |
| 620 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 621 | if (!dev) |
| 622 | return NULL; |
| 623 | |
| 624 | kref_init(&dev->ref); |
| 625 | dev->dev = parent; |
| 626 | dev->driver = driver; |
| 627 | |
| 628 | INIT_LIST_HEAD(&dev->filelist); |
| 629 | INIT_LIST_HEAD(&dev->ctxlist); |
| 630 | INIT_LIST_HEAD(&dev->vmalist); |
| 631 | INIT_LIST_HEAD(&dev->maplist); |
| 632 | INIT_LIST_HEAD(&dev->vblank_event_list); |
| 633 | |
| 634 | spin_lock_init(&dev->count_lock); |
| 635 | spin_lock_init(&dev->event_lock); |
| 636 | #ifdef __NetBSD__ |
| 637 | linux_mutex_init(&dev->struct_mutex); |
| 638 | linux_mutex_init(&dev->ctxlist_mutex); |
| 639 | linux_mutex_init(&dev->master_mutex); |
| 640 | #else |
| 641 | mutex_init(&dev->struct_mutex); |
| 642 | mutex_init(&dev->ctxlist_mutex); |
| 643 | mutex_init(&dev->master_mutex); |
| 644 | #endif |
| 645 | |
| 646 | dev->anon_inode = drm_fs_inode_new(); |
| 647 | if (IS_ERR(dev->anon_inode)) { |
| 648 | ret = PTR_ERR(dev->anon_inode); |
| 649 | DRM_ERROR("Cannot allocate anonymous inode: %d\n" , ret); |
| 650 | goto err_free; |
| 651 | } |
| 652 | |
| 653 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 654 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); |
| 655 | if (ret) |
| 656 | goto err_minors; |
| 657 | } |
| 658 | |
| 659 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { |
| 660 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
| 661 | if (ret) |
| 662 | goto err_minors; |
| 663 | } |
| 664 | |
| 665 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); |
| 666 | if (ret) |
| 667 | goto err_minors; |
| 668 | |
| 669 | if (drm_ht_create(&dev->map_hash, 12)) |
| 670 | goto err_minors; |
| 671 | |
| 672 | ret = drm_ctxbitmap_init(dev); |
| 673 | if (ret) { |
| 674 | DRM_ERROR("Cannot allocate memory for context bitmap.\n" ); |
| 675 | goto err_ht; |
| 676 | } |
| 677 | |
| 678 | if (driver->driver_features & DRIVER_GEM) { |
| 679 | ret = drm_gem_init(dev); |
| 680 | if (ret) { |
| 681 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n" ); |
| 682 | goto err_ctxbitmap; |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | return dev; |
| 687 | |
| 688 | err_ctxbitmap: |
| 689 | drm_ctxbitmap_cleanup(dev); |
| 690 | err_ht: |
| 691 | drm_ht_remove(&dev->map_hash); |
| 692 | err_minors: |
| 693 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 694 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 695 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
| 696 | drm_fs_inode_free(dev->anon_inode); |
| 697 | err_free: |
| 698 | #ifdef __NetBSD__ |
| 699 | linux_mutex_destroy(&dev->struct_mutex); |
| 700 | linux_mutex_destroy(&dev->ctxlist_mutex); |
| 701 | linux_mutex_destroy(&dev->master_mutex); |
| 702 | spin_lock_destroy(&dev->event_lock); |
| 703 | spin_lock_destroy(&dev->count_lock); |
| 704 | #else |
| 705 | mutex_destroy(&dev->master_mutex); |
| 706 | #endif |
| 707 | kfree(dev); |
| 708 | return NULL; |
| 709 | } |
| 710 | EXPORT_SYMBOL(drm_dev_alloc); |
| 711 | |
| 712 | static void drm_dev_release(struct kref *ref) |
| 713 | { |
| 714 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
| 715 | |
| 716 | if (dev->driver->driver_features & DRIVER_GEM) |
| 717 | drm_gem_destroy(dev); |
| 718 | |
| 719 | drm_ctxbitmap_cleanup(dev); |
| 720 | drm_ht_remove(&dev->map_hash); |
| 721 | drm_fs_inode_free(dev->anon_inode); |
| 722 | |
| 723 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
| 724 | drm_minor_free(dev, DRM_MINOR_RENDER); |
| 725 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
| 726 | |
| 727 | kfree(dev->devname); |
| 728 | |
| 729 | #ifdef __NetBSD__ |
| 730 | linux_mutex_destroy(&dev->struct_mutex); |
| 731 | linux_mutex_destroy(&dev->ctxlist_mutex); |
| 732 | linux_mutex_destroy(&dev->master_mutex); |
| 733 | spin_lock_destroy(&dev->event_lock); |
| 734 | spin_lock_destroy(&dev->count_lock); |
| 735 | #else |
| 736 | mutex_destroy(&dev->master_mutex); |
| 737 | #endif |
| 738 | kfree(dev); |
| 739 | } |
| 740 | |
| 741 | /** |
| 742 | * drm_dev_ref - Take reference of a DRM device |
| 743 | * @dev: device to take reference of or NULL |
| 744 | * |
| 745 | * This increases the ref-count of @dev by one. You *must* already own a |
| 746 | * reference when calling this. Use drm_dev_unref() to drop this reference |
| 747 | * again. |
| 748 | * |
| 749 | * This function never fails. However, this function does not provide *any* |
| 750 | * guarantee whether the device is alive or running. It only provides a |
| 751 | * reference to the object and the memory associated with it. |
| 752 | */ |
| 753 | void drm_dev_ref(struct drm_device *dev) |
| 754 | { |
| 755 | if (dev) |
| 756 | kref_get(&dev->ref); |
| 757 | } |
| 758 | EXPORT_SYMBOL(drm_dev_ref); |
| 759 | |
| 760 | /** |
| 761 | * drm_dev_unref - Drop reference of a DRM device |
| 762 | * @dev: device to drop reference of or NULL |
| 763 | * |
| 764 | * This decreases the ref-count of @dev by one. The device is destroyed if the |
| 765 | * ref-count drops to zero. |
| 766 | */ |
| 767 | void drm_dev_unref(struct drm_device *dev) |
| 768 | { |
| 769 | if (dev) |
| 770 | kref_put(&dev->ref, drm_dev_release); |
| 771 | } |
| 772 | EXPORT_SYMBOL(drm_dev_unref); |
| 773 | |
| 774 | /** |
| 775 | * drm_dev_register - Register DRM device |
| 776 | * @dev: Device to register |
| 777 | * |
| 778 | * Register the DRM device @dev with the system, advertise device to user-space |
| 779 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() |
| 780 | * previously. |
| 781 | * |
| 782 | * Never call this twice on any device! |
| 783 | * |
| 784 | * RETURNS: |
| 785 | * 0 on success, negative error code on failure. |
| 786 | */ |
| 787 | int drm_dev_register(struct drm_device *dev, unsigned long flags) |
| 788 | { |
| 789 | int ret; |
| 790 | |
| 791 | #ifndef __NetBSD__ |
| 792 | mutex_lock(&drm_global_mutex); |
| 793 | #endif |
| 794 | |
| 795 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
| 796 | if (ret) |
| 797 | goto err_minors; |
| 798 | |
| 799 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
| 800 | if (ret) |
| 801 | goto err_minors; |
| 802 | |
| 803 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
| 804 | if (ret) |
| 805 | goto err_minors; |
| 806 | |
| 807 | if (dev->driver->load) { |
| 808 | ret = dev->driver->load(dev, flags); |
| 809 | if (ret) |
| 810 | goto err_minors; |
| 811 | } |
| 812 | |
| 813 | /* setup grouping for legacy outputs */ |
| 814 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
| 815 | ret = drm_mode_group_init_legacy_group(dev, |
| 816 | &dev->primary->mode_group); |
| 817 | if (ret) |
| 818 | goto err_unload; |
| 819 | } |
| 820 | |
| 821 | ret = 0; |
| 822 | goto out_unlock; |
| 823 | |
| 824 | err_unload: |
| 825 | if (dev->driver->unload) |
| 826 | dev->driver->unload(dev); |
| 827 | err_minors: |
| 828 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 829 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 830 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
| 831 | out_unlock: |
| 832 | #ifndef __NetBSD__ |
| 833 | mutex_unlock(&drm_global_mutex); |
| 834 | #endif |
| 835 | return ret; |
| 836 | } |
| 837 | EXPORT_SYMBOL(drm_dev_register); |
| 838 | |
| 839 | /** |
| 840 | * drm_dev_unregister - Unregister DRM device |
| 841 | * @dev: Device to unregister |
| 842 | * |
| 843 | * Unregister the DRM device from the system. This does the reverse of |
| 844 | * drm_dev_register() but does not deallocate the device. The caller must call |
| 845 | * drm_dev_unref() to drop their final reference. |
| 846 | */ |
| 847 | void drm_dev_unregister(struct drm_device *dev) |
| 848 | { |
| 849 | struct drm_map_list *r_list, *list_temp; |
| 850 | |
| 851 | drm_lastclose(dev); |
| 852 | |
| 853 | if (dev->driver->unload) |
| 854 | dev->driver->unload(dev); |
| 855 | |
| 856 | #ifndef __NetBSD__ /* Moved to drm_pci. */ |
| 857 | if (dev->agp) |
| 858 | drm_pci_agp_destroy(dev); |
| 859 | #endif |
| 860 | |
| 861 | drm_vblank_cleanup(dev); |
| 862 | |
| 863 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) |
| 864 | drm_rmmap(dev, r_list->map); |
| 865 | |
| 866 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
| 867 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
| 868 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
| 869 | } |
| 870 | EXPORT_SYMBOL(drm_dev_unregister); |
| 871 | |