Commit | Line | Data |
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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" |
1da177e4 | 38 | |
b5e89ed5 | 39 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
1da177e4 LT |
40 | EXPORT_SYMBOL(drm_debug); |
41 | ||
27641c3f | 42 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
27641c3f MK |
43 | |
44 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ | |
27641c3f | 45 | |
c61eef72 ID |
46 | /* |
47 | * Default to use monotonic timestamps for wait-for-vblank and page-flip | |
48 | * complete events. | |
49 | */ | |
50 | unsigned int drm_timestamp_monotonic = 1; | |
51 | ||
b5e89ed5 DA |
52 | MODULE_AUTHOR(CORE_AUTHOR); |
53 | MODULE_DESCRIPTION(CORE_DESC); | |
1da177e4 | 54 | MODULE_LICENSE("GPL and additional rights"); |
1da177e4 | 55 | MODULE_PARM_DESC(debug, "Enable debug output"); |
27641c3f MK |
56 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
57 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); | |
c61eef72 | 58 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
1da177e4 | 59 | |
c0758146 | 60 | module_param_named(debug, drm_debug, int, 0600); |
27641c3f MK |
61 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
62 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); | |
c61eef72 | 63 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
1da177e4 | 64 | |
0d639883 | 65 | static DEFINE_SPINLOCK(drm_minor_lock); |
1b7199fe | 66 | static struct idr drm_minors_idr; |
2c14f28b | 67 | |
0650fd58 | 68 | struct class *drm_class; |
1b7199fe | 69 | static struct dentry *drm_debugfs_root; |
5ad3d883 JP |
70 | |
71 | int drm_err(const char *func, const char *format, ...) | |
72 | { | |
73 | struct va_format vaf; | |
74 | va_list args; | |
75 | int r; | |
76 | ||
77 | va_start(args, format); | |
78 | ||
79 | vaf.fmt = format; | |
80 | vaf.va = &args; | |
81 | ||
82 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); | |
83 | ||
84 | va_end(args); | |
85 | ||
86 | return r; | |
87 | } | |
88 | EXPORT_SYMBOL(drm_err); | |
89 | ||
1287aa90 | 90 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
4fefcb27 | 91 | { |
fffb9065 | 92 | struct va_format vaf; |
4fefcb27 | 93 | va_list args; |
1da177e4 | 94 | |
a73d4e91 LD |
95 | va_start(args, format); |
96 | vaf.fmt = format; | |
97 | vaf.va = &args; | |
98 | ||
0ed02983 | 99 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
a73d4e91 LD |
100 | |
101 | va_end(args); | |
4fefcb27 | 102 | } |
103 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 104 | |
7c1c2871 DA |
105 | struct drm_master *drm_master_create(struct drm_minor *minor) |
106 | { | |
107 | struct drm_master *master; | |
108 | ||
9a298b2a | 109 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
110 | if (!master) |
111 | return NULL; | |
112 | ||
113 | kref_init(&master->refcount); | |
114 | spin_lock_init(&master->lock.spinlock); | |
115 | init_waitqueue_head(&master->lock.lock_queue); | |
10e68569 DV |
116 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
117 | kfree(master); | |
118 | return NULL; | |
119 | } | |
7c1c2871 DA |
120 | INIT_LIST_HEAD(&master->magicfree); |
121 | master->minor = minor; | |
122 | ||
7c1c2871 DA |
123 | return master; |
124 | } | |
125 | ||
126 | struct drm_master *drm_master_get(struct drm_master *master) | |
127 | { | |
128 | kref_get(&master->refcount); | |
129 | return master; | |
130 | } | |
85bb0c37 | 131 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
132 | |
133 | static void drm_master_destroy(struct kref *kref) | |
134 | { | |
135 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
136 | struct drm_magic_entry *pt, *next; | |
137 | struct drm_device *dev = master->minor->dev; | |
c1ff85d9 | 138 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 | 139 | |
c996fd0b | 140 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
141 | if (dev->driver->master_destroy) |
142 | dev->driver->master_destroy(dev, master); | |
143 | ||
c1ff85d9 DA |
144 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
145 | if (r_list->master == master) { | |
146 | drm_rmmap_locked(dev, r_list->map); | |
147 | r_list = NULL; | |
148 | } | |
149 | } | |
150 | ||
7c1c2871 | 151 | if (master->unique) { |
9a298b2a | 152 | kfree(master->unique); |
7c1c2871 DA |
153 | master->unique = NULL; |
154 | master->unique_len = 0; | |
155 | } | |
156 | ||
157 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { | |
158 | list_del(&pt->head); | |
159 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); | |
9a298b2a | 160 | kfree(pt); |
7c1c2871 DA |
161 | } |
162 | ||
163 | drm_ht_remove(&master->magiclist); | |
164 | ||
c996fd0b | 165 | mutex_unlock(&dev->struct_mutex); |
9a298b2a | 166 | kfree(master); |
7c1c2871 DA |
167 | } |
168 | ||
169 | void drm_master_put(struct drm_master **master) | |
170 | { | |
171 | kref_put(&(*master)->refcount, drm_master_destroy); | |
172 | *master = NULL; | |
173 | } | |
85bb0c37 | 174 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
175 | |
176 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
177 | struct drm_file *file_priv) | |
178 | { | |
53ef1600 | 179 | int ret = 0; |
862302ff | 180 | |
c996fd0b | 181 | mutex_lock(&dev->master_mutex); |
7963e9db | 182 | if (file_priv->is_master) |
c996fd0b | 183 | goto out_unlock; |
7c1c2871 | 184 | |
c996fd0b TH |
185 | if (file_priv->minor->master) { |
186 | ret = -EINVAL; | |
187 | goto out_unlock; | |
188 | } | |
7c1c2871 | 189 | |
c996fd0b TH |
190 | if (!file_priv->master) { |
191 | ret = -EINVAL; | |
192 | goto out_unlock; | |
193 | } | |
08bec5b4 | 194 | |
08bec5b4 | 195 | file_priv->minor->master = drm_master_get(file_priv->master); |
7963e9db | 196 | file_priv->is_master = 1; |
08bec5b4 DH |
197 | if (dev->driver->master_set) { |
198 | ret = dev->driver->master_set(dev, file_priv, false); | |
7963e9db DA |
199 | if (unlikely(ret != 0)) { |
200 | file_priv->is_master = 0; | |
08bec5b4 | 201 | drm_master_put(&file_priv->minor->master); |
7963e9db | 202 | } |
7c1c2871 DA |
203 | } |
204 | ||
c996fd0b TH |
205 | out_unlock: |
206 | mutex_unlock(&dev->master_mutex); | |
53ef1600 | 207 | return ret; |
7c1c2871 DA |
208 | } |
209 | ||
210 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
211 | struct drm_file *file_priv) | |
212 | { | |
c996fd0b TH |
213 | int ret = -EINVAL; |
214 | ||
215 | mutex_lock(&dev->master_mutex); | |
7963e9db | 216 | if (!file_priv->is_master) |
c996fd0b | 217 | goto out_unlock; |
6b008426 | 218 | |
07f1c7a7 | 219 | if (!file_priv->minor->master) |
c996fd0b | 220 | goto out_unlock; |
07f1c7a7 | 221 | |
c996fd0b | 222 | ret = 0; |
862302ff TH |
223 | if (dev->driver->master_drop) |
224 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 225 | drm_master_put(&file_priv->minor->master); |
7963e9db | 226 | file_priv->is_master = 0; |
c996fd0b TH |
227 | |
228 | out_unlock: | |
229 | mutex_unlock(&dev->master_mutex); | |
230 | return ret; | |
7c1c2871 DA |
231 | } |
232 | ||
0d639883 DH |
233 | /* |
234 | * DRM Minors | |
235 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
236 | * of them is represented by a drm_minor object. Depending on the capabilities | |
237 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 238 | * |
0d639883 DH |
239 | * Minors can be accessed via dev->$minor_name. This pointer is either |
240 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
241 | * valid. This means, DRM minors have the same life-time as the underlying | |
242 | * device. However, this doesn't mean that the minor is active. Minors are | |
243 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 244 | */ |
0d639883 | 245 | |
05b701f6 DH |
246 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
247 | unsigned int type) | |
248 | { | |
249 | switch (type) { | |
250 | case DRM_MINOR_LEGACY: | |
251 | return &dev->primary; | |
252 | case DRM_MINOR_RENDER: | |
253 | return &dev->render; | |
254 | case DRM_MINOR_CONTROL: | |
255 | return &dev->control; | |
256 | default: | |
257 | return NULL; | |
258 | } | |
259 | } | |
260 | ||
261 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
262 | { | |
263 | struct drm_minor *minor; | |
f1b85962 DH |
264 | unsigned long flags; |
265 | int r; | |
05b701f6 DH |
266 | |
267 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
268 | if (!minor) | |
269 | return -ENOMEM; | |
270 | ||
271 | minor->type = type; | |
272 | minor->dev = dev; | |
05b701f6 | 273 | |
f1b85962 DH |
274 | idr_preload(GFP_KERNEL); |
275 | spin_lock_irqsave(&drm_minor_lock, flags); | |
276 | r = idr_alloc(&drm_minors_idr, | |
277 | NULL, | |
278 | 64 * type, | |
279 | 64 * (type + 1), | |
280 | GFP_NOWAIT); | |
281 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
282 | idr_preload_end(); | |
283 | ||
284 | if (r < 0) | |
285 | goto err_free; | |
286 | ||
287 | minor->index = r; | |
288 | ||
e1728075 DH |
289 | minor->kdev = drm_sysfs_minor_alloc(minor); |
290 | if (IS_ERR(minor->kdev)) { | |
291 | r = PTR_ERR(minor->kdev); | |
292 | goto err_index; | |
293 | } | |
294 | ||
05b701f6 DH |
295 | *drm_minor_get_slot(dev, type) = minor; |
296 | return 0; | |
f1b85962 | 297 | |
e1728075 DH |
298 | err_index: |
299 | spin_lock_irqsave(&drm_minor_lock, flags); | |
300 | idr_remove(&drm_minors_idr, minor->index); | |
301 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
f1b85962 DH |
302 | err_free: |
303 | kfree(minor); | |
304 | return r; | |
05b701f6 DH |
305 | } |
306 | ||
bd9dfa98 DH |
307 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
308 | { | |
f1b85962 DH |
309 | struct drm_minor **slot, *minor; |
310 | unsigned long flags; | |
bd9dfa98 DH |
311 | |
312 | slot = drm_minor_get_slot(dev, type); | |
f1b85962 DH |
313 | minor = *slot; |
314 | if (!minor) | |
315 | return; | |
316 | ||
317 | drm_mode_group_destroy(&minor->mode_group); | |
e1728075 | 318 | put_device(minor->kdev); |
f1b85962 DH |
319 | |
320 | spin_lock_irqsave(&drm_minor_lock, flags); | |
321 | idr_remove(&drm_minors_idr, minor->index); | |
322 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
323 | ||
324 | kfree(minor); | |
325 | *slot = NULL; | |
bd9dfa98 DH |
326 | } |
327 | ||
afcdbc86 | 328 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 329 | { |
f1b85962 | 330 | struct drm_minor *minor; |
0d639883 | 331 | unsigned long flags; |
1da177e4 | 332 | int ret; |
1da177e4 LT |
333 | |
334 | DRM_DEBUG("\n"); | |
335 | ||
f1b85962 DH |
336 | minor = *drm_minor_get_slot(dev, type); |
337 | if (!minor) | |
05b701f6 DH |
338 | return 0; |
339 | ||
f1b85962 | 340 | ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); |
955b12de | 341 | if (ret) { |
156f5a78 | 342 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
f1b85962 | 343 | return ret; |
955b12de | 344 | } |
2c14f28b | 345 | |
e1728075 DH |
346 | ret = device_add(minor->kdev); |
347 | if (ret) | |
cb6458f9 | 348 | goto err_debugfs; |
2c14f28b | 349 | |
0d639883 DH |
350 | /* replace NULL with @minor so lookups will succeed from now on */ |
351 | spin_lock_irqsave(&drm_minor_lock, flags); | |
f1b85962 | 352 | idr_replace(&drm_minors_idr, minor, minor->index); |
0d639883 | 353 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
2c14f28b | 354 | |
f1b85962 | 355 | DRM_DEBUG("new minor registered %d\n", minor->index); |
2c14f28b DA |
356 | return 0; |
357 | ||
cb6458f9 | 358 | err_debugfs: |
f1b85962 | 359 | drm_debugfs_cleanup(minor); |
1da177e4 LT |
360 | return ret; |
361 | } | |
b5e89ed5 | 362 | |
afcdbc86 | 363 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 364 | { |
afcdbc86 | 365 | struct drm_minor *minor; |
0d639883 | 366 | unsigned long flags; |
afcdbc86 DH |
367 | |
368 | minor = *drm_minor_get_slot(dev, type); | |
e1728075 | 369 | if (!minor || !device_is_registered(minor->kdev)) |
f73aca50 DH |
370 | return; |
371 | ||
f1b85962 | 372 | /* replace @minor with NULL so lookups will fail from now on */ |
0d639883 | 373 | spin_lock_irqsave(&drm_minor_lock, flags); |
f1b85962 | 374 | idr_replace(&drm_minors_idr, NULL, minor->index); |
0d639883 | 375 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
865fb47f | 376 | |
e1728075 DH |
377 | device_del(minor->kdev); |
378 | dev_set_drvdata(minor->kdev, NULL); /* safety belt */ | |
865fb47f | 379 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
380 | } |
381 | ||
382 | /** | |
1616c525 DH |
383 | * drm_minor_acquire - Acquire a DRM minor |
384 | * @minor_id: Minor ID of the DRM-minor | |
385 | * | |
386 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
387 | * refence-count of the underlying device is increased so you must release this | |
388 | * object with drm_minor_release(). | |
389 | * | |
390 | * As long as you hold this minor, it is guaranteed that the object and the | |
391 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
392 | * unregistered while you hold the minor. | |
f73aca50 | 393 | * |
1616c525 DH |
394 | * Returns: |
395 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
396 | * failure. | |
1da177e4 | 397 | */ |
1616c525 | 398 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 399 | { |
1616c525 | 400 | struct drm_minor *minor; |
0d639883 | 401 | unsigned long flags; |
1616c525 | 402 | |
0d639883 | 403 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 404 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
405 | if (minor) |
406 | drm_dev_ref(minor->dev); | |
407 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
408 | ||
409 | if (!minor) { | |
410 | return ERR_PTR(-ENODEV); | |
411 | } else if (drm_device_is_unplugged(minor->dev)) { | |
412 | drm_dev_unref(minor->dev); | |
1616c525 | 413 | return ERR_PTR(-ENODEV); |
0d639883 | 414 | } |
673a394b | 415 | |
1616c525 DH |
416 | return minor; |
417 | } | |
b5e89ed5 | 418 | |
1616c525 DH |
419 | /** |
420 | * drm_minor_release - Release DRM minor | |
421 | * @minor: Pointer to DRM minor object | |
422 | * | |
423 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
424 | */ | |
425 | void drm_minor_release(struct drm_minor *minor) | |
426 | { | |
427 | drm_dev_unref(minor->dev); | |
1da177e4 | 428 | } |
112b715e KH |
429 | |
430 | /** | |
c6a1af8a TR |
431 | * drm_put_dev - Unregister and release a DRM device |
432 | * @dev: DRM device | |
112b715e | 433 | * |
c6a1af8a | 434 | * Called at module unload time or when a PCI device is unplugged. |
112b715e | 435 | * |
c6a1af8a TR |
436 | * Use of this function is discouraged. It will eventually go away completely. |
437 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. | |
438 | * | |
439 | * Cleans up all DRM device, calling drm_lastclose(). | |
112b715e KH |
440 | */ |
441 | void drm_put_dev(struct drm_device *dev) | |
442 | { | |
112b715e KH |
443 | DRM_DEBUG("\n"); |
444 | ||
445 | if (!dev) { | |
446 | DRM_ERROR("cleanup called no dev\n"); | |
447 | return; | |
448 | } | |
449 | ||
c3a49737 | 450 | drm_dev_unregister(dev); |
099d1c29 | 451 | drm_dev_unref(dev); |
112b715e KH |
452 | } |
453 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
454 | |
455 | void drm_unplug_dev(struct drm_device *dev) | |
456 | { | |
457 | /* for a USB device */ | |
afcdbc86 DH |
458 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
459 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
460 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
461 | |
462 | mutex_lock(&drm_global_mutex); | |
463 | ||
464 | drm_device_set_unplugged(dev); | |
465 | ||
466 | if (dev->open_count == 0) { | |
467 | drm_put_dev(dev); | |
468 | } | |
469 | mutex_unlock(&drm_global_mutex); | |
470 | } | |
471 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 472 | |
31bbe16f DH |
473 | /* |
474 | * DRM internal mount | |
475 | * We want to be able to allocate our own "struct address_space" to control | |
476 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
477 | * stand-alone address_space objects, so we need an underlying inode. As there | |
478 | * is no way to allocate an independent inode easily, we need a fake internal | |
479 | * VFS mount-point. | |
480 | * | |
481 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
482 | * frees it again. You are allowed to use iget() and iput() to get references to | |
483 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
484 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
485 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
486 | * between multiple inode-users. You could, technically, call | |
487 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
488 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
489 | */ | |
490 | ||
491 | static int drm_fs_cnt; | |
492 | static struct vfsmount *drm_fs_mnt; | |
493 | ||
494 | static const struct dentry_operations drm_fs_dops = { | |
495 | .d_dname = simple_dname, | |
496 | }; | |
497 | ||
498 | static const struct super_operations drm_fs_sops = { | |
499 | .statfs = simple_statfs, | |
500 | }; | |
501 | ||
502 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
503 | const char *dev_name, void *data) | |
504 | { | |
505 | return mount_pseudo(fs_type, | |
506 | "drm:", | |
507 | &drm_fs_sops, | |
508 | &drm_fs_dops, | |
509 | 0x010203ff); | |
510 | } | |
511 | ||
512 | static struct file_system_type drm_fs_type = { | |
513 | .name = "drm", | |
514 | .owner = THIS_MODULE, | |
515 | .mount = drm_fs_mount, | |
516 | .kill_sb = kill_anon_super, | |
517 | }; | |
518 | ||
519 | static struct inode *drm_fs_inode_new(void) | |
520 | { | |
521 | struct inode *inode; | |
522 | int r; | |
523 | ||
524 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
525 | if (r < 0) { | |
526 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
527 | return ERR_PTR(r); | |
528 | } | |
529 | ||
530 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
531 | if (IS_ERR(inode)) | |
532 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
533 | ||
534 | return inode; | |
535 | } | |
536 | ||
537 | static void drm_fs_inode_free(struct inode *inode) | |
538 | { | |
539 | if (inode) { | |
540 | iput(inode); | |
541 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
542 | } | |
543 | } | |
544 | ||
1bb72532 | 545 | /** |
c6a1af8a | 546 | * drm_dev_alloc - Allocate new DRM device |
1bb72532 DH |
547 | * @driver: DRM driver to allocate device for |
548 | * @parent: Parent device object | |
549 | * | |
550 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
551 | * Call drm_dev_register() to advertice the device to user space and register it |
552 | * with other core subsystems. | |
1bb72532 | 553 | * |
099d1c29 DH |
554 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
555 | * drm_dev_unref() to take and drop further ref-counts. | |
556 | * | |
1bb72532 DH |
557 | * RETURNS: |
558 | * Pointer to new DRM device, or NULL if out of memory. | |
559 | */ | |
560 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
561 | struct device *parent) | |
562 | { | |
563 | struct drm_device *dev; | |
564 | int ret; | |
565 | ||
566 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
567 | if (!dev) | |
568 | return NULL; | |
569 | ||
099d1c29 | 570 | kref_init(&dev->ref); |
1bb72532 DH |
571 | dev->dev = parent; |
572 | dev->driver = driver; | |
573 | ||
574 | INIT_LIST_HEAD(&dev->filelist); | |
575 | INIT_LIST_HEAD(&dev->ctxlist); | |
576 | INIT_LIST_HEAD(&dev->vmalist); | |
577 | INIT_LIST_HEAD(&dev->maplist); | |
578 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
579 | ||
2177a218 | 580 | spin_lock_init(&dev->buf_lock); |
1bb72532 DH |
581 | spin_lock_init(&dev->event_lock); |
582 | mutex_init(&dev->struct_mutex); | |
583 | mutex_init(&dev->ctxlist_mutex); | |
c996fd0b | 584 | mutex_init(&dev->master_mutex); |
1bb72532 | 585 | |
6796cb16 DH |
586 | dev->anon_inode = drm_fs_inode_new(); |
587 | if (IS_ERR(dev->anon_inode)) { | |
588 | ret = PTR_ERR(dev->anon_inode); | |
589 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 590 | goto err_free; |
6796cb16 DH |
591 | } |
592 | ||
05b701f6 DH |
593 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
594 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
595 | if (ret) | |
596 | goto err_minors; | |
597 | } | |
598 | ||
6d6dfcfb | 599 | if (drm_core_check_feature(dev, DRIVER_RENDER)) { |
05b701f6 DH |
600 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
601 | if (ret) | |
602 | goto err_minors; | |
603 | } | |
604 | ||
605 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
606 | if (ret) | |
607 | goto err_minors; | |
608 | ||
6796cb16 | 609 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 610 | goto err_minors; |
1bb72532 | 611 | |
e7b96070 | 612 | ret = drm_legacy_ctxbitmap_init(dev); |
1bb72532 DH |
613 | if (ret) { |
614 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
615 | goto err_ht; | |
616 | } | |
617 | ||
618 | if (driver->driver_features & DRIVER_GEM) { | |
619 | ret = drm_gem_init(dev); | |
620 | if (ret) { | |
621 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
622 | goto err_ctxbitmap; | |
623 | } | |
624 | } | |
625 | ||
626 | return dev; | |
627 | ||
628 | err_ctxbitmap: | |
e7b96070 | 629 | drm_legacy_ctxbitmap_cleanup(dev); |
1bb72532 DH |
630 | err_ht: |
631 | drm_ht_remove(&dev->map_hash); | |
05b701f6 | 632 | err_minors: |
bd9dfa98 DH |
633 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
634 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
635 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 636 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 | 637 | err_free: |
c996fd0b | 638 | mutex_destroy(&dev->master_mutex); |
1bb72532 DH |
639 | kfree(dev); |
640 | return NULL; | |
641 | } | |
642 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 643 | |
099d1c29 | 644 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 645 | { |
099d1c29 | 646 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 647 | |
0dc8fe59 DH |
648 | if (dev->driver->driver_features & DRIVER_GEM) |
649 | drm_gem_destroy(dev); | |
650 | ||
e7b96070 | 651 | drm_legacy_ctxbitmap_cleanup(dev); |
0dc8fe59 | 652 | drm_ht_remove(&dev->map_hash); |
6796cb16 | 653 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 654 | |
bd9dfa98 DH |
655 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
656 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
657 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
658 | ||
c996fd0b | 659 | mutex_destroy(&dev->master_mutex); |
ca8e2ad7 | 660 | kfree(dev->unique); |
0dc8fe59 DH |
661 | kfree(dev); |
662 | } | |
099d1c29 DH |
663 | |
664 | /** | |
665 | * drm_dev_ref - Take reference of a DRM device | |
666 | * @dev: device to take reference of or NULL | |
667 | * | |
668 | * This increases the ref-count of @dev by one. You *must* already own a | |
669 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
670 | * again. | |
671 | * | |
672 | * This function never fails. However, this function does not provide *any* | |
673 | * guarantee whether the device is alive or running. It only provides a | |
674 | * reference to the object and the memory associated with it. | |
675 | */ | |
676 | void drm_dev_ref(struct drm_device *dev) | |
677 | { | |
678 | if (dev) | |
679 | kref_get(&dev->ref); | |
680 | } | |
681 | EXPORT_SYMBOL(drm_dev_ref); | |
682 | ||
683 | /** | |
684 | * drm_dev_unref - Drop reference of a DRM device | |
685 | * @dev: device to drop reference of or NULL | |
686 | * | |
687 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
688 | * ref-count drops to zero. | |
689 | */ | |
690 | void drm_dev_unref(struct drm_device *dev) | |
691 | { | |
692 | if (dev) | |
693 | kref_put(&dev->ref, drm_dev_release); | |
694 | } | |
695 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 696 | |
c22f0ace DH |
697 | /** |
698 | * drm_dev_register - Register DRM device | |
699 | * @dev: Device to register | |
c6a1af8a | 700 | * @flags: Flags passed to the driver's .load() function |
c22f0ace DH |
701 | * |
702 | * Register the DRM device @dev with the system, advertise device to user-space | |
703 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
704 | * previously. | |
705 | * | |
706 | * Never call this twice on any device! | |
707 | * | |
708 | * RETURNS: | |
709 | * 0 on success, negative error code on failure. | |
710 | */ | |
711 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
712 | { | |
713 | int ret; | |
714 | ||
715 | mutex_lock(&drm_global_mutex); | |
716 | ||
afcdbc86 | 717 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
718 | if (ret) |
719 | goto err_minors; | |
c22f0ace | 720 | |
afcdbc86 | 721 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
722 | if (ret) |
723 | goto err_minors; | |
c22f0ace | 724 | |
afcdbc86 | 725 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 726 | if (ret) |
05b701f6 | 727 | goto err_minors; |
c22f0ace DH |
728 | |
729 | if (dev->driver->load) { | |
730 | ret = dev->driver->load(dev, flags); | |
731 | if (ret) | |
05b701f6 | 732 | goto err_minors; |
c22f0ace DH |
733 | } |
734 | ||
735 | /* setup grouping for legacy outputs */ | |
736 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
737 | ret = drm_mode_group_init_legacy_group(dev, | |
738 | &dev->primary->mode_group); | |
739 | if (ret) | |
740 | goto err_unload; | |
741 | } | |
742 | ||
c22f0ace DH |
743 | ret = 0; |
744 | goto out_unlock; | |
745 | ||
746 | err_unload: | |
747 | if (dev->driver->unload) | |
748 | dev->driver->unload(dev); | |
05b701f6 | 749 | err_minors: |
afcdbc86 DH |
750 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
751 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
752 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
753 | out_unlock: |
754 | mutex_unlock(&drm_global_mutex); | |
755 | return ret; | |
756 | } | |
757 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
758 | |
759 | /** | |
760 | * drm_dev_unregister - Unregister DRM device | |
761 | * @dev: Device to unregister | |
762 | * | |
763 | * Unregister the DRM device from the system. This does the reverse of | |
764 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 765 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
766 | */ |
767 | void drm_dev_unregister(struct drm_device *dev) | |
768 | { | |
769 | struct drm_map_list *r_list, *list_temp; | |
770 | ||
771 | drm_lastclose(dev); | |
772 | ||
773 | if (dev->driver->unload) | |
774 | dev->driver->unload(dev); | |
775 | ||
4efafebe DV |
776 | if (dev->agp) |
777 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
778 | |
779 | drm_vblank_cleanup(dev); | |
780 | ||
781 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
782 | drm_rmmap(dev, r_list->map); | |
783 | ||
afcdbc86 DH |
784 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
785 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
786 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
787 | } |
788 | EXPORT_SYMBOL(drm_dev_unregister); | |
ca8e2ad7 TR |
789 | |
790 | /** | |
791 | * drm_dev_set_unique - Set the unique name of a DRM device | |
792 | * @dev: device of which to set the unique name | |
793 | * @fmt: format string for unique name | |
794 | * | |
795 | * Sets the unique name of a DRM device using the specified format string and | |
796 | * a variable list of arguments. Drivers can use this at driver probe time if | |
797 | * the unique name of the devices they drive is static. | |
798 | * | |
799 | * Return: 0 on success or a negative error code on failure. | |
800 | */ | |
801 | int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) | |
802 | { | |
803 | va_list ap; | |
804 | ||
805 | kfree(dev->unique); | |
806 | ||
807 | va_start(ap, fmt); | |
808 | dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); | |
809 | va_end(ap); | |
810 | ||
811 | return dev->unique ? 0 : -ENOMEM; | |
812 | } | |
813 | EXPORT_SYMBOL(drm_dev_set_unique); | |
1b7199fe DH |
814 | |
815 | /* | |
816 | * DRM Core | |
817 | * The DRM core module initializes all global DRM objects and makes them | |
818 | * available to drivers. Once setup, drivers can probe their respective | |
819 | * devices. | |
820 | * Currently, core management includes: | |
821 | * - The "DRM-Global" key/value database | |
822 | * - Global ID management for connectors | |
823 | * - DRM major number allocation | |
824 | * - DRM minor management | |
825 | * - DRM sysfs class | |
826 | * - DRM debugfs root | |
827 | * | |
828 | * Furthermore, the DRM core provides dynamic char-dev lookups. For each | |
829 | * interface registered on a DRM device, you can request minor numbers from DRM | |
830 | * core. DRM core takes care of major-number management and char-dev | |
831 | * registration. A stub ->open() callback forwards any open() requests to the | |
832 | * registered minor. | |
833 | */ | |
834 | ||
835 | static int drm_stub_open(struct inode *inode, struct file *filp) | |
836 | { | |
837 | const struct file_operations *new_fops; | |
838 | struct drm_minor *minor; | |
839 | int err; | |
840 | ||
841 | DRM_DEBUG("\n"); | |
842 | ||
843 | mutex_lock(&drm_global_mutex); | |
844 | minor = drm_minor_acquire(iminor(inode)); | |
845 | if (IS_ERR(minor)) { | |
846 | err = PTR_ERR(minor); | |
847 | goto out_unlock; | |
848 | } | |
849 | ||
850 | new_fops = fops_get(minor->dev->driver->fops); | |
851 | if (!new_fops) { | |
852 | err = -ENODEV; | |
853 | goto out_release; | |
854 | } | |
855 | ||
856 | replace_fops(filp, new_fops); | |
857 | if (filp->f_op->open) | |
858 | err = filp->f_op->open(inode, filp); | |
859 | else | |
860 | err = 0; | |
861 | ||
862 | out_release: | |
863 | drm_minor_release(minor); | |
864 | out_unlock: | |
865 | mutex_unlock(&drm_global_mutex); | |
866 | return err; | |
867 | } | |
868 | ||
869 | static const struct file_operations drm_stub_fops = { | |
870 | .owner = THIS_MODULE, | |
871 | .open = drm_stub_open, | |
872 | .llseek = noop_llseek, | |
873 | }; | |
874 | ||
875 | static int __init drm_core_init(void) | |
876 | { | |
877 | int ret = -ENOMEM; | |
878 | ||
879 | drm_global_init(); | |
880 | drm_connector_ida_init(); | |
881 | idr_init(&drm_minors_idr); | |
882 | ||
883 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
884 | goto err_p1; | |
885 | ||
886 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); | |
887 | if (IS_ERR(drm_class)) { | |
888 | printk(KERN_ERR "DRM: Error creating drm class.\n"); | |
889 | ret = PTR_ERR(drm_class); | |
890 | goto err_p2; | |
891 | } | |
892 | ||
893 | drm_debugfs_root = debugfs_create_dir("dri", NULL); | |
894 | if (!drm_debugfs_root) { | |
895 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); | |
896 | ret = -1; | |
897 | goto err_p3; | |
898 | } | |
899 | ||
900 | DRM_INFO("Initialized %s %d.%d.%d %s\n", | |
901 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
902 | return 0; | |
903 | err_p3: | |
904 | drm_sysfs_destroy(); | |
905 | err_p2: | |
906 | unregister_chrdev(DRM_MAJOR, "drm"); | |
907 | ||
908 | idr_destroy(&drm_minors_idr); | |
909 | err_p1: | |
910 | return ret; | |
911 | } | |
912 | ||
913 | static void __exit drm_core_exit(void) | |
914 | { | |
915 | debugfs_remove(drm_debugfs_root); | |
916 | drm_sysfs_destroy(); | |
917 | ||
918 | unregister_chrdev(DRM_MAJOR, "drm"); | |
919 | ||
920 | drm_connector_ida_destroy(); | |
921 | idr_destroy(&drm_minors_idr); | |
922 | } | |
923 | ||
924 | module_init(drm_core_init); | |
925 | module_exit(drm_core_exit); |