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1da177e4 LT |
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 | * | |
c6a1af8a TR |
7 | * Author Rickard E. (Rik) Faith <faith@valinux.com> |
8 | * | |
1da177e4 LT |
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 | ||
1b7199fe | 29 | #include <linux/debugfs.h> |
31bbe16f | 30 | #include <linux/fs.h> |
1da177e4 LT |
31 | #include <linux/module.h> |
32 | #include <linux/moduleparam.h> | |
31bbe16f | 33 | #include <linux/mount.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
760285e7 DH |
35 | #include <drm/drmP.h> |
36 | #include <drm/drm_core.h> | |
e7b96070 | 37 | #include "drm_legacy.h" |
67d0ec4e | 38 | #include "drm_internal.h" |
1da177e4 | 39 | |
b5e89ed5 | 40 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
1da177e4 LT |
41 | EXPORT_SYMBOL(drm_debug); |
42 | ||
88a48e29 RC |
43 | bool drm_atomic = 0; |
44 | ||
b5e89ed5 DA |
45 | MODULE_AUTHOR(CORE_AUTHOR); |
46 | MODULE_DESCRIPTION(CORE_DESC); | |
1da177e4 | 47 | MODULE_LICENSE("GPL and additional rights"); |
1da177e4 | 48 | MODULE_PARM_DESC(debug, "Enable debug output"); |
88a48e29 | 49 | MODULE_PARM_DESC(atomic, "Enable experimental atomic KMS API"); |
4ed0ce3d | 50 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)"); |
27641c3f | 51 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
c61eef72 | 52 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
1da177e4 | 53 | |
c0758146 | 54 | module_param_named(debug, drm_debug, int, 0600); |
88a48e29 | 55 | module_param_named_unsafe(atomic, drm_atomic, bool, 0600); |
1da177e4 | 56 | |
0d639883 | 57 | static DEFINE_SPINLOCK(drm_minor_lock); |
1b7199fe | 58 | static struct idr drm_minors_idr; |
2c14f28b | 59 | |
0650fd58 | 60 | struct class *drm_class; |
1b7199fe | 61 | static struct dentry *drm_debugfs_root; |
5ad3d883 | 62 | |
a1f1a79c | 63 | void drm_err(const char *format, ...) |
5ad3d883 JP |
64 | { |
65 | struct va_format vaf; | |
66 | va_list args; | |
5ad3d883 JP |
67 | |
68 | va_start(args, format); | |
69 | ||
70 | vaf.fmt = format; | |
71 | vaf.va = &args; | |
72 | ||
2ee762b3 | 73 | printk(KERN_ERR "[" DRM_NAME ":%ps] *ERROR* %pV", |
a1f1a79c | 74 | __builtin_return_address(0), &vaf); |
5ad3d883 JP |
75 | |
76 | va_end(args); | |
5ad3d883 JP |
77 | } |
78 | EXPORT_SYMBOL(drm_err); | |
79 | ||
1287aa90 | 80 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
4fefcb27 | 81 | { |
fffb9065 | 82 | struct va_format vaf; |
4fefcb27 | 83 | va_list args; |
1da177e4 | 84 | |
a73d4e91 LD |
85 | va_start(args, format); |
86 | vaf.fmt = format; | |
87 | vaf.va = &args; | |
88 | ||
0ed02983 | 89 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
a73d4e91 LD |
90 | |
91 | va_end(args); | |
4fefcb27 | 92 | } |
93 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 94 | |
6865b20a DV |
95 | #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */ |
96 | ||
7c1c2871 DA |
97 | struct drm_master *drm_master_create(struct drm_minor *minor) |
98 | { | |
99 | struct drm_master *master; | |
100 | ||
9a298b2a | 101 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
102 | if (!master) |
103 | return NULL; | |
104 | ||
105 | kref_init(&master->refcount); | |
106 | spin_lock_init(&master->lock.spinlock); | |
107 | init_waitqueue_head(&master->lock.lock_queue); | |
10e68569 DV |
108 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
109 | kfree(master); | |
110 | return NULL; | |
111 | } | |
7c1c2871 DA |
112 | master->minor = minor; |
113 | ||
7c1c2871 DA |
114 | return master; |
115 | } | |
116 | ||
117 | struct drm_master *drm_master_get(struct drm_master *master) | |
118 | { | |
119 | kref_get(&master->refcount); | |
120 | return master; | |
121 | } | |
85bb0c37 | 122 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
123 | |
124 | static void drm_master_destroy(struct kref *kref) | |
125 | { | |
126 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
7c1c2871 | 127 | struct drm_device *dev = master->minor->dev; |
c1ff85d9 | 128 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 | 129 | |
c996fd0b | 130 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
131 | if (dev->driver->master_destroy) |
132 | dev->driver->master_destroy(dev, master); | |
133 | ||
c1ff85d9 DA |
134 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
135 | if (r_list->master == master) { | |
9fc5cde7 | 136 | drm_legacy_rmmap_locked(dev, r_list->map); |
c1ff85d9 DA |
137 | r_list = NULL; |
138 | } | |
139 | } | |
140 | ||
7c1c2871 | 141 | if (master->unique) { |
9a298b2a | 142 | kfree(master->unique); |
7c1c2871 DA |
143 | master->unique = NULL; |
144 | master->unique_len = 0; | |
145 | } | |
146 | ||
7c1c2871 DA |
147 | drm_ht_remove(&master->magiclist); |
148 | ||
c996fd0b | 149 | mutex_unlock(&dev->struct_mutex); |
9a298b2a | 150 | kfree(master); |
7c1c2871 DA |
151 | } |
152 | ||
153 | void drm_master_put(struct drm_master **master) | |
154 | { | |
155 | kref_put(&(*master)->refcount, drm_master_destroy); | |
156 | *master = NULL; | |
157 | } | |
85bb0c37 | 158 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
159 | |
160 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
161 | struct drm_file *file_priv) | |
162 | { | |
53ef1600 | 163 | int ret = 0; |
862302ff | 164 | |
c996fd0b | 165 | mutex_lock(&dev->master_mutex); |
7963e9db | 166 | if (file_priv->is_master) |
c996fd0b | 167 | goto out_unlock; |
7c1c2871 | 168 | |
c996fd0b TH |
169 | if (file_priv->minor->master) { |
170 | ret = -EINVAL; | |
171 | goto out_unlock; | |
172 | } | |
7c1c2871 | 173 | |
c996fd0b TH |
174 | if (!file_priv->master) { |
175 | ret = -EINVAL; | |
176 | goto out_unlock; | |
177 | } | |
08bec5b4 | 178 | |
08bec5b4 | 179 | file_priv->minor->master = drm_master_get(file_priv->master); |
7963e9db | 180 | file_priv->is_master = 1; |
08bec5b4 DH |
181 | if (dev->driver->master_set) { |
182 | ret = dev->driver->master_set(dev, file_priv, false); | |
7963e9db DA |
183 | if (unlikely(ret != 0)) { |
184 | file_priv->is_master = 0; | |
08bec5b4 | 185 | drm_master_put(&file_priv->minor->master); |
7963e9db | 186 | } |
7c1c2871 DA |
187 | } |
188 | ||
c996fd0b TH |
189 | out_unlock: |
190 | mutex_unlock(&dev->master_mutex); | |
53ef1600 | 191 | return ret; |
7c1c2871 DA |
192 | } |
193 | ||
194 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
195 | struct drm_file *file_priv) | |
196 | { | |
c996fd0b TH |
197 | int ret = -EINVAL; |
198 | ||
199 | mutex_lock(&dev->master_mutex); | |
7963e9db | 200 | if (!file_priv->is_master) |
c996fd0b | 201 | goto out_unlock; |
6b008426 | 202 | |
07f1c7a7 | 203 | if (!file_priv->minor->master) |
c996fd0b | 204 | goto out_unlock; |
07f1c7a7 | 205 | |
c996fd0b | 206 | ret = 0; |
862302ff TH |
207 | if (dev->driver->master_drop) |
208 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 209 | drm_master_put(&file_priv->minor->master); |
7963e9db | 210 | file_priv->is_master = 0; |
c996fd0b TH |
211 | |
212 | out_unlock: | |
213 | mutex_unlock(&dev->master_mutex); | |
214 | return ret; | |
7c1c2871 DA |
215 | } |
216 | ||
0d639883 DH |
217 | /* |
218 | * DRM Minors | |
219 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
220 | * of them is represented by a drm_minor object. Depending on the capabilities | |
221 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 222 | * |
0d639883 DH |
223 | * Minors can be accessed via dev->$minor_name. This pointer is either |
224 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
225 | * valid. This means, DRM minors have the same life-time as the underlying | |
226 | * device. However, this doesn't mean that the minor is active. Minors are | |
227 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 228 | */ |
0d639883 | 229 | |
05b701f6 DH |
230 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
231 | unsigned int type) | |
232 | { | |
233 | switch (type) { | |
234 | case DRM_MINOR_LEGACY: | |
235 | return &dev->primary; | |
236 | case DRM_MINOR_RENDER: | |
237 | return &dev->render; | |
238 | case DRM_MINOR_CONTROL: | |
239 | return &dev->control; | |
240 | default: | |
241 | return NULL; | |
242 | } | |
243 | } | |
244 | ||
245 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
246 | { | |
247 | struct drm_minor *minor; | |
f1b85962 DH |
248 | unsigned long flags; |
249 | int r; | |
05b701f6 DH |
250 | |
251 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
252 | if (!minor) | |
253 | return -ENOMEM; | |
254 | ||
255 | minor->type = type; | |
256 | minor->dev = dev; | |
05b701f6 | 257 | |
f1b85962 DH |
258 | idr_preload(GFP_KERNEL); |
259 | spin_lock_irqsave(&drm_minor_lock, flags); | |
260 | r = idr_alloc(&drm_minors_idr, | |
261 | NULL, | |
262 | 64 * type, | |
263 | 64 * (type + 1), | |
264 | GFP_NOWAIT); | |
265 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
266 | idr_preload_end(); | |
267 | ||
268 | if (r < 0) | |
269 | goto err_free; | |
270 | ||
271 | minor->index = r; | |
272 | ||
e1728075 DH |
273 | minor->kdev = drm_sysfs_minor_alloc(minor); |
274 | if (IS_ERR(minor->kdev)) { | |
275 | r = PTR_ERR(minor->kdev); | |
276 | goto err_index; | |
277 | } | |
278 | ||
05b701f6 DH |
279 | *drm_minor_get_slot(dev, type) = minor; |
280 | return 0; | |
f1b85962 | 281 | |
e1728075 DH |
282 | err_index: |
283 | spin_lock_irqsave(&drm_minor_lock, flags); | |
284 | idr_remove(&drm_minors_idr, minor->index); | |
285 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
f1b85962 DH |
286 | err_free: |
287 | kfree(minor); | |
288 | return r; | |
05b701f6 DH |
289 | } |
290 | ||
bd9dfa98 DH |
291 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
292 | { | |
f1b85962 DH |
293 | struct drm_minor **slot, *minor; |
294 | unsigned long flags; | |
bd9dfa98 DH |
295 | |
296 | slot = drm_minor_get_slot(dev, type); | |
f1b85962 DH |
297 | minor = *slot; |
298 | if (!minor) | |
299 | return; | |
300 | ||
301 | drm_mode_group_destroy(&minor->mode_group); | |
e1728075 | 302 | put_device(minor->kdev); |
f1b85962 DH |
303 | |
304 | spin_lock_irqsave(&drm_minor_lock, flags); | |
305 | idr_remove(&drm_minors_idr, minor->index); | |
306 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
307 | ||
308 | kfree(minor); | |
309 | *slot = NULL; | |
bd9dfa98 DH |
310 | } |
311 | ||
afcdbc86 | 312 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 313 | { |
f1b85962 | 314 | struct drm_minor *minor; |
0d639883 | 315 | unsigned long flags; |
1da177e4 | 316 | int ret; |
1da177e4 LT |
317 | |
318 | DRM_DEBUG("\n"); | |
319 | ||
f1b85962 DH |
320 | minor = *drm_minor_get_slot(dev, type); |
321 | if (!minor) | |
05b701f6 DH |
322 | return 0; |
323 | ||
f1b85962 | 324 | ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); |
955b12de | 325 | if (ret) { |
156f5a78 | 326 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
f1b85962 | 327 | return ret; |
955b12de | 328 | } |
2c14f28b | 329 | |
e1728075 DH |
330 | ret = device_add(minor->kdev); |
331 | if (ret) | |
cb6458f9 | 332 | goto err_debugfs; |
2c14f28b | 333 | |
0d639883 DH |
334 | /* replace NULL with @minor so lookups will succeed from now on */ |
335 | spin_lock_irqsave(&drm_minor_lock, flags); | |
f1b85962 | 336 | idr_replace(&drm_minors_idr, minor, minor->index); |
0d639883 | 337 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
2c14f28b | 338 | |
f1b85962 | 339 | DRM_DEBUG("new minor registered %d\n", minor->index); |
2c14f28b DA |
340 | return 0; |
341 | ||
cb6458f9 | 342 | err_debugfs: |
f1b85962 | 343 | drm_debugfs_cleanup(minor); |
1da177e4 LT |
344 | return ret; |
345 | } | |
b5e89ed5 | 346 | |
afcdbc86 | 347 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 348 | { |
afcdbc86 | 349 | struct drm_minor *minor; |
0d639883 | 350 | unsigned long flags; |
afcdbc86 DH |
351 | |
352 | minor = *drm_minor_get_slot(dev, type); | |
e1728075 | 353 | if (!minor || !device_is_registered(minor->kdev)) |
f73aca50 DH |
354 | return; |
355 | ||
f1b85962 | 356 | /* replace @minor with NULL so lookups will fail from now on */ |
0d639883 | 357 | spin_lock_irqsave(&drm_minor_lock, flags); |
f1b85962 | 358 | idr_replace(&drm_minors_idr, NULL, minor->index); |
0d639883 | 359 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
865fb47f | 360 | |
e1728075 DH |
361 | device_del(minor->kdev); |
362 | dev_set_drvdata(minor->kdev, NULL); /* safety belt */ | |
865fb47f | 363 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
364 | } |
365 | ||
366 | /** | |
1616c525 DH |
367 | * drm_minor_acquire - Acquire a DRM minor |
368 | * @minor_id: Minor ID of the DRM-minor | |
369 | * | |
370 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
371 | * refence-count of the underlying device is increased so you must release this | |
372 | * object with drm_minor_release(). | |
373 | * | |
374 | * As long as you hold this minor, it is guaranteed that the object and the | |
375 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
376 | * unregistered while you hold the minor. | |
f73aca50 | 377 | * |
1616c525 DH |
378 | * Returns: |
379 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
380 | * failure. | |
1da177e4 | 381 | */ |
1616c525 | 382 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 383 | { |
1616c525 | 384 | struct drm_minor *minor; |
0d639883 | 385 | unsigned long flags; |
1616c525 | 386 | |
0d639883 | 387 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 388 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
389 | if (minor) |
390 | drm_dev_ref(minor->dev); | |
391 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
392 | ||
393 | if (!minor) { | |
394 | return ERR_PTR(-ENODEV); | |
395 | } else if (drm_device_is_unplugged(minor->dev)) { | |
396 | drm_dev_unref(minor->dev); | |
1616c525 | 397 | return ERR_PTR(-ENODEV); |
0d639883 | 398 | } |
673a394b | 399 | |
1616c525 DH |
400 | return minor; |
401 | } | |
b5e89ed5 | 402 | |
1616c525 DH |
403 | /** |
404 | * drm_minor_release - Release DRM minor | |
405 | * @minor: Pointer to DRM minor object | |
406 | * | |
407 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
408 | */ | |
409 | void drm_minor_release(struct drm_minor *minor) | |
410 | { | |
411 | drm_dev_unref(minor->dev); | |
1da177e4 | 412 | } |
112b715e KH |
413 | |
414 | /** | |
c6a1af8a TR |
415 | * drm_put_dev - Unregister and release a DRM device |
416 | * @dev: DRM device | |
112b715e | 417 | * |
c6a1af8a | 418 | * Called at module unload time or when a PCI device is unplugged. |
112b715e | 419 | * |
c6a1af8a TR |
420 | * Use of this function is discouraged. It will eventually go away completely. |
421 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. | |
422 | * | |
423 | * Cleans up all DRM device, calling drm_lastclose(). | |
112b715e KH |
424 | */ |
425 | void drm_put_dev(struct drm_device *dev) | |
426 | { | |
112b715e KH |
427 | DRM_DEBUG("\n"); |
428 | ||
429 | if (!dev) { | |
430 | DRM_ERROR("cleanup called no dev\n"); | |
431 | return; | |
432 | } | |
433 | ||
c3a49737 | 434 | drm_dev_unregister(dev); |
099d1c29 | 435 | drm_dev_unref(dev); |
112b715e KH |
436 | } |
437 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
438 | |
439 | void drm_unplug_dev(struct drm_device *dev) | |
440 | { | |
441 | /* for a USB device */ | |
afcdbc86 DH |
442 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
443 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
444 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
445 | |
446 | mutex_lock(&drm_global_mutex); | |
447 | ||
448 | drm_device_set_unplugged(dev); | |
449 | ||
450 | if (dev->open_count == 0) { | |
451 | drm_put_dev(dev); | |
452 | } | |
453 | mutex_unlock(&drm_global_mutex); | |
454 | } | |
455 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 456 | |
31bbe16f DH |
457 | /* |
458 | * DRM internal mount | |
459 | * We want to be able to allocate our own "struct address_space" to control | |
460 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
461 | * stand-alone address_space objects, so we need an underlying inode. As there | |
462 | * is no way to allocate an independent inode easily, we need a fake internal | |
463 | * VFS mount-point. | |
464 | * | |
465 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
466 | * frees it again. You are allowed to use iget() and iput() to get references to | |
467 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
468 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
469 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
470 | * between multiple inode-users. You could, technically, call | |
471 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
472 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
473 | */ | |
474 | ||
475 | static int drm_fs_cnt; | |
476 | static struct vfsmount *drm_fs_mnt; | |
477 | ||
478 | static const struct dentry_operations drm_fs_dops = { | |
479 | .d_dname = simple_dname, | |
480 | }; | |
481 | ||
482 | static const struct super_operations drm_fs_sops = { | |
483 | .statfs = simple_statfs, | |
484 | }; | |
485 | ||
486 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
487 | const char *dev_name, void *data) | |
488 | { | |
489 | return mount_pseudo(fs_type, | |
490 | "drm:", | |
491 | &drm_fs_sops, | |
492 | &drm_fs_dops, | |
493 | 0x010203ff); | |
494 | } | |
495 | ||
496 | static struct file_system_type drm_fs_type = { | |
497 | .name = "drm", | |
498 | .owner = THIS_MODULE, | |
499 | .mount = drm_fs_mount, | |
500 | .kill_sb = kill_anon_super, | |
501 | }; | |
502 | ||
503 | static struct inode *drm_fs_inode_new(void) | |
504 | { | |
505 | struct inode *inode; | |
506 | int r; | |
507 | ||
508 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
509 | if (r < 0) { | |
510 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
511 | return ERR_PTR(r); | |
512 | } | |
513 | ||
514 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
515 | if (IS_ERR(inode)) | |
516 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
517 | ||
518 | return inode; | |
519 | } | |
520 | ||
521 | static void drm_fs_inode_free(struct inode *inode) | |
522 | { | |
523 | if (inode) { | |
524 | iput(inode); | |
525 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
526 | } | |
527 | } | |
528 | ||
1bb72532 | 529 | /** |
c6a1af8a | 530 | * drm_dev_alloc - Allocate new DRM device |
1bb72532 DH |
531 | * @driver: DRM driver to allocate device for |
532 | * @parent: Parent device object | |
533 | * | |
534 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
535 | * Call drm_dev_register() to advertice the device to user space and register it |
536 | * with other core subsystems. | |
1bb72532 | 537 | * |
099d1c29 DH |
538 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
539 | * drm_dev_unref() to take and drop further ref-counts. | |
540 | * | |
b0ff4b93 DV |
541 | * Note that for purely virtual devices @parent can be NULL. |
542 | * | |
1bb72532 DH |
543 | * RETURNS: |
544 | * Pointer to new DRM device, or NULL if out of memory. | |
545 | */ | |
546 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
547 | struct device *parent) | |
548 | { | |
549 | struct drm_device *dev; | |
550 | int ret; | |
551 | ||
552 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
553 | if (!dev) | |
554 | return NULL; | |
555 | ||
099d1c29 | 556 | kref_init(&dev->ref); |
1bb72532 DH |
557 | dev->dev = parent; |
558 | dev->driver = driver; | |
559 | ||
560 | INIT_LIST_HEAD(&dev->filelist); | |
561 | INIT_LIST_HEAD(&dev->ctxlist); | |
562 | INIT_LIST_HEAD(&dev->vmalist); | |
563 | INIT_LIST_HEAD(&dev->maplist); | |
564 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
565 | ||
2177a218 | 566 | spin_lock_init(&dev->buf_lock); |
1bb72532 DH |
567 | spin_lock_init(&dev->event_lock); |
568 | mutex_init(&dev->struct_mutex); | |
569 | mutex_init(&dev->ctxlist_mutex); | |
c996fd0b | 570 | mutex_init(&dev->master_mutex); |
1bb72532 | 571 | |
6796cb16 DH |
572 | dev->anon_inode = drm_fs_inode_new(); |
573 | if (IS_ERR(dev->anon_inode)) { | |
574 | ret = PTR_ERR(dev->anon_inode); | |
575 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 576 | goto err_free; |
6796cb16 DH |
577 | } |
578 | ||
05b701f6 DH |
579 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
580 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
581 | if (ret) | |
582 | goto err_minors; | |
583 | } | |
584 | ||
6d6dfcfb | 585 | if (drm_core_check_feature(dev, DRIVER_RENDER)) { |
05b701f6 DH |
586 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
587 | if (ret) | |
588 | goto err_minors; | |
589 | } | |
590 | ||
591 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
592 | if (ret) | |
593 | goto err_minors; | |
594 | ||
6796cb16 | 595 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 596 | goto err_minors; |
1bb72532 | 597 | |
e7b96070 | 598 | ret = drm_legacy_ctxbitmap_init(dev); |
1bb72532 DH |
599 | if (ret) { |
600 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
601 | goto err_ht; | |
602 | } | |
603 | ||
1bcecfac | 604 | if (drm_core_check_feature(dev, DRIVER_GEM)) { |
1bb72532 DH |
605 | ret = drm_gem_init(dev); |
606 | if (ret) { | |
607 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
608 | goto err_ctxbitmap; | |
609 | } | |
610 | } | |
611 | ||
612 | return dev; | |
613 | ||
614 | err_ctxbitmap: | |
e7b96070 | 615 | drm_legacy_ctxbitmap_cleanup(dev); |
1bb72532 DH |
616 | err_ht: |
617 | drm_ht_remove(&dev->map_hash); | |
05b701f6 | 618 | err_minors: |
bd9dfa98 DH |
619 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
620 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
621 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 622 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 | 623 | err_free: |
c996fd0b | 624 | mutex_destroy(&dev->master_mutex); |
1bb72532 DH |
625 | kfree(dev); |
626 | return NULL; | |
627 | } | |
628 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 629 | |
099d1c29 | 630 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 631 | { |
099d1c29 | 632 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 633 | |
1bcecfac | 634 | if (drm_core_check_feature(dev, DRIVER_GEM)) |
0dc8fe59 DH |
635 | drm_gem_destroy(dev); |
636 | ||
e7b96070 | 637 | drm_legacy_ctxbitmap_cleanup(dev); |
0dc8fe59 | 638 | drm_ht_remove(&dev->map_hash); |
6796cb16 | 639 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 640 | |
bd9dfa98 DH |
641 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
642 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
643 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
644 | ||
c996fd0b | 645 | mutex_destroy(&dev->master_mutex); |
ca8e2ad7 | 646 | kfree(dev->unique); |
0dc8fe59 DH |
647 | kfree(dev); |
648 | } | |
099d1c29 DH |
649 | |
650 | /** | |
651 | * drm_dev_ref - Take reference of a DRM device | |
652 | * @dev: device to take reference of or NULL | |
653 | * | |
654 | * This increases the ref-count of @dev by one. You *must* already own a | |
655 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
656 | * again. | |
657 | * | |
658 | * This function never fails. However, this function does not provide *any* | |
659 | * guarantee whether the device is alive or running. It only provides a | |
660 | * reference to the object and the memory associated with it. | |
661 | */ | |
662 | void drm_dev_ref(struct drm_device *dev) | |
663 | { | |
664 | if (dev) | |
665 | kref_get(&dev->ref); | |
666 | } | |
667 | EXPORT_SYMBOL(drm_dev_ref); | |
668 | ||
669 | /** | |
670 | * drm_dev_unref - Drop reference of a DRM device | |
671 | * @dev: device to drop reference of or NULL | |
672 | * | |
673 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
674 | * ref-count drops to zero. | |
675 | */ | |
676 | void drm_dev_unref(struct drm_device *dev) | |
677 | { | |
678 | if (dev) | |
679 | kref_put(&dev->ref, drm_dev_release); | |
680 | } | |
681 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 682 | |
c22f0ace DH |
683 | /** |
684 | * drm_dev_register - Register DRM device | |
685 | * @dev: Device to register | |
c6a1af8a | 686 | * @flags: Flags passed to the driver's .load() function |
c22f0ace DH |
687 | * |
688 | * Register the DRM device @dev with the system, advertise device to user-space | |
689 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
690 | * previously. | |
691 | * | |
692 | * Never call this twice on any device! | |
693 | * | |
694 | * RETURNS: | |
695 | * 0 on success, negative error code on failure. | |
696 | */ | |
697 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
698 | { | |
699 | int ret; | |
700 | ||
701 | mutex_lock(&drm_global_mutex); | |
702 | ||
afcdbc86 | 703 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
704 | if (ret) |
705 | goto err_minors; | |
c22f0ace | 706 | |
afcdbc86 | 707 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
708 | if (ret) |
709 | goto err_minors; | |
c22f0ace | 710 | |
afcdbc86 | 711 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 712 | if (ret) |
05b701f6 | 713 | goto err_minors; |
c22f0ace DH |
714 | |
715 | if (dev->driver->load) { | |
716 | ret = dev->driver->load(dev, flags); | |
717 | if (ret) | |
05b701f6 | 718 | goto err_minors; |
c22f0ace DH |
719 | } |
720 | ||
721 | /* setup grouping for legacy outputs */ | |
722 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
723 | ret = drm_mode_group_init_legacy_group(dev, | |
724 | &dev->primary->mode_group); | |
725 | if (ret) | |
726 | goto err_unload; | |
727 | } | |
728 | ||
c22f0ace DH |
729 | ret = 0; |
730 | goto out_unlock; | |
731 | ||
732 | err_unload: | |
733 | if (dev->driver->unload) | |
734 | dev->driver->unload(dev); | |
05b701f6 | 735 | err_minors: |
afcdbc86 DH |
736 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
737 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
738 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
739 | out_unlock: |
740 | mutex_unlock(&drm_global_mutex); | |
741 | return ret; | |
742 | } | |
743 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
744 | |
745 | /** | |
746 | * drm_dev_unregister - Unregister DRM device | |
747 | * @dev: Device to unregister | |
748 | * | |
749 | * Unregister the DRM device from the system. This does the reverse of | |
750 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 751 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
752 | */ |
753 | void drm_dev_unregister(struct drm_device *dev) | |
754 | { | |
755 | struct drm_map_list *r_list, *list_temp; | |
756 | ||
757 | drm_lastclose(dev); | |
758 | ||
759 | if (dev->driver->unload) | |
760 | dev->driver->unload(dev); | |
761 | ||
4efafebe DV |
762 | if (dev->agp) |
763 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
764 | |
765 | drm_vblank_cleanup(dev); | |
766 | ||
767 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
9fc5cde7 | 768 | drm_legacy_rmmap(dev, r_list->map); |
c3a49737 | 769 | |
afcdbc86 DH |
770 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
771 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
772 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
773 | } |
774 | EXPORT_SYMBOL(drm_dev_unregister); | |
ca8e2ad7 TR |
775 | |
776 | /** | |
777 | * drm_dev_set_unique - Set the unique name of a DRM device | |
778 | * @dev: device of which to set the unique name | |
779 | * @fmt: format string for unique name | |
780 | * | |
781 | * Sets the unique name of a DRM device using the specified format string and | |
782 | * a variable list of arguments. Drivers can use this at driver probe time if | |
783 | * the unique name of the devices they drive is static. | |
784 | * | |
785 | * Return: 0 on success or a negative error code on failure. | |
786 | */ | |
787 | int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) | |
788 | { | |
789 | va_list ap; | |
790 | ||
791 | kfree(dev->unique); | |
792 | ||
793 | va_start(ap, fmt); | |
794 | dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); | |
795 | va_end(ap); | |
796 | ||
797 | return dev->unique ? 0 : -ENOMEM; | |
798 | } | |
799 | EXPORT_SYMBOL(drm_dev_set_unique); | |
1b7199fe DH |
800 | |
801 | /* | |
802 | * DRM Core | |
803 | * The DRM core module initializes all global DRM objects and makes them | |
804 | * available to drivers. Once setup, drivers can probe their respective | |
805 | * devices. | |
806 | * Currently, core management includes: | |
807 | * - The "DRM-Global" key/value database | |
808 | * - Global ID management for connectors | |
809 | * - DRM major number allocation | |
810 | * - DRM minor management | |
811 | * - DRM sysfs class | |
812 | * - DRM debugfs root | |
813 | * | |
814 | * Furthermore, the DRM core provides dynamic char-dev lookups. For each | |
815 | * interface registered on a DRM device, you can request minor numbers from DRM | |
816 | * core. DRM core takes care of major-number management and char-dev | |
817 | * registration. A stub ->open() callback forwards any open() requests to the | |
818 | * registered minor. | |
819 | */ | |
820 | ||
821 | static int drm_stub_open(struct inode *inode, struct file *filp) | |
822 | { | |
823 | const struct file_operations *new_fops; | |
824 | struct drm_minor *minor; | |
825 | int err; | |
826 | ||
827 | DRM_DEBUG("\n"); | |
828 | ||
829 | mutex_lock(&drm_global_mutex); | |
830 | minor = drm_minor_acquire(iminor(inode)); | |
831 | if (IS_ERR(minor)) { | |
832 | err = PTR_ERR(minor); | |
833 | goto out_unlock; | |
834 | } | |
835 | ||
836 | new_fops = fops_get(minor->dev->driver->fops); | |
837 | if (!new_fops) { | |
838 | err = -ENODEV; | |
839 | goto out_release; | |
840 | } | |
841 | ||
842 | replace_fops(filp, new_fops); | |
843 | if (filp->f_op->open) | |
844 | err = filp->f_op->open(inode, filp); | |
845 | else | |
846 | err = 0; | |
847 | ||
848 | out_release: | |
849 | drm_minor_release(minor); | |
850 | out_unlock: | |
851 | mutex_unlock(&drm_global_mutex); | |
852 | return err; | |
853 | } | |
854 | ||
855 | static const struct file_operations drm_stub_fops = { | |
856 | .owner = THIS_MODULE, | |
857 | .open = drm_stub_open, | |
858 | .llseek = noop_llseek, | |
859 | }; | |
860 | ||
861 | static int __init drm_core_init(void) | |
862 | { | |
863 | int ret = -ENOMEM; | |
864 | ||
865 | drm_global_init(); | |
866 | drm_connector_ida_init(); | |
867 | idr_init(&drm_minors_idr); | |
868 | ||
869 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
870 | goto err_p1; | |
871 | ||
872 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); | |
873 | if (IS_ERR(drm_class)) { | |
874 | printk(KERN_ERR "DRM: Error creating drm class.\n"); | |
875 | ret = PTR_ERR(drm_class); | |
876 | goto err_p2; | |
877 | } | |
878 | ||
879 | drm_debugfs_root = debugfs_create_dir("dri", NULL); | |
880 | if (!drm_debugfs_root) { | |
881 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); | |
882 | ret = -1; | |
883 | goto err_p3; | |
884 | } | |
885 | ||
886 | DRM_INFO("Initialized %s %d.%d.%d %s\n", | |
887 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
888 | return 0; | |
889 | err_p3: | |
890 | drm_sysfs_destroy(); | |
891 | err_p2: | |
892 | unregister_chrdev(DRM_MAJOR, "drm"); | |
893 | ||
894 | idr_destroy(&drm_minors_idr); | |
895 | err_p1: | |
896 | return ret; | |
897 | } | |
898 | ||
899 | static void __exit drm_core_exit(void) | |
900 | { | |
901 | debugfs_remove(drm_debugfs_root); | |
902 | drm_sysfs_destroy(); | |
903 | ||
904 | unregister_chrdev(DRM_MAJOR, "drm"); | |
905 | ||
906 | drm_connector_ida_destroy(); | |
907 | idr_destroy(&drm_minors_idr); | |
908 | } | |
909 | ||
910 | module_init(drm_core_init); | |
911 | module_exit(drm_core_exit); |