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> | |
1da177e4 | 37 | |
b5e89ed5 | 38 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
1da177e4 LT |
39 | EXPORT_SYMBOL(drm_debug); |
40 | ||
27641c3f | 41 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
27641c3f MK |
42 | |
43 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ | |
27641c3f | 44 | |
c61eef72 ID |
45 | /* |
46 | * Default to use monotonic timestamps for wait-for-vblank and page-flip | |
47 | * complete events. | |
48 | */ | |
49 | unsigned int drm_timestamp_monotonic = 1; | |
50 | ||
b5e89ed5 DA |
51 | MODULE_AUTHOR(CORE_AUTHOR); |
52 | MODULE_DESCRIPTION(CORE_DESC); | |
1da177e4 | 53 | MODULE_LICENSE("GPL and additional rights"); |
1da177e4 | 54 | MODULE_PARM_DESC(debug, "Enable debug output"); |
27641c3f MK |
55 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
56 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); | |
c61eef72 | 57 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
1da177e4 | 58 | |
c0758146 | 59 | module_param_named(debug, drm_debug, int, 0600); |
27641c3f MK |
60 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
61 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); | |
c61eef72 | 62 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
1da177e4 | 63 | |
0d639883 | 64 | static DEFINE_SPINLOCK(drm_minor_lock); |
1b7199fe | 65 | static struct idr drm_minors_idr; |
2c14f28b | 66 | |
0650fd58 | 67 | struct class *drm_class; |
1b7199fe | 68 | static struct dentry *drm_debugfs_root; |
5ad3d883 JP |
69 | |
70 | int drm_err(const char *func, const char *format, ...) | |
71 | { | |
72 | struct va_format vaf; | |
73 | va_list args; | |
74 | int r; | |
75 | ||
76 | va_start(args, format); | |
77 | ||
78 | vaf.fmt = format; | |
79 | vaf.va = &args; | |
80 | ||
81 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); | |
82 | ||
83 | va_end(args); | |
84 | ||
85 | return r; | |
86 | } | |
87 | EXPORT_SYMBOL(drm_err); | |
88 | ||
1287aa90 | 89 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
4fefcb27 | 90 | { |
fffb9065 | 91 | struct va_format vaf; |
4fefcb27 | 92 | va_list args; |
1da177e4 | 93 | |
a73d4e91 LD |
94 | va_start(args, format); |
95 | vaf.fmt = format; | |
96 | vaf.va = &args; | |
97 | ||
0ed02983 | 98 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
a73d4e91 LD |
99 | |
100 | va_end(args); | |
4fefcb27 | 101 | } |
102 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 103 | |
7c1c2871 DA |
104 | struct drm_master *drm_master_create(struct drm_minor *minor) |
105 | { | |
106 | struct drm_master *master; | |
107 | ||
9a298b2a | 108 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
109 | if (!master) |
110 | return NULL; | |
111 | ||
112 | kref_init(&master->refcount); | |
113 | spin_lock_init(&master->lock.spinlock); | |
114 | init_waitqueue_head(&master->lock.lock_queue); | |
10e68569 DV |
115 | if (drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER)) { |
116 | kfree(master); | |
117 | return NULL; | |
118 | } | |
7c1c2871 DA |
119 | INIT_LIST_HEAD(&master->magicfree); |
120 | master->minor = minor; | |
121 | ||
7c1c2871 DA |
122 | return master; |
123 | } | |
124 | ||
125 | struct drm_master *drm_master_get(struct drm_master *master) | |
126 | { | |
127 | kref_get(&master->refcount); | |
128 | return master; | |
129 | } | |
85bb0c37 | 130 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
131 | |
132 | static void drm_master_destroy(struct kref *kref) | |
133 | { | |
134 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
135 | struct drm_magic_entry *pt, *next; | |
136 | struct drm_device *dev = master->minor->dev; | |
c1ff85d9 | 137 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 | 138 | |
c996fd0b | 139 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
140 | if (dev->driver->master_destroy) |
141 | dev->driver->master_destroy(dev, master); | |
142 | ||
c1ff85d9 DA |
143 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
144 | if (r_list->master == master) { | |
145 | drm_rmmap_locked(dev, r_list->map); | |
146 | r_list = NULL; | |
147 | } | |
148 | } | |
149 | ||
7c1c2871 | 150 | if (master->unique) { |
9a298b2a | 151 | kfree(master->unique); |
7c1c2871 DA |
152 | master->unique = NULL; |
153 | master->unique_len = 0; | |
154 | } | |
155 | ||
156 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { | |
157 | list_del(&pt->head); | |
158 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); | |
9a298b2a | 159 | kfree(pt); |
7c1c2871 DA |
160 | } |
161 | ||
162 | drm_ht_remove(&master->magiclist); | |
163 | ||
c996fd0b | 164 | mutex_unlock(&dev->struct_mutex); |
9a298b2a | 165 | kfree(master); |
7c1c2871 DA |
166 | } |
167 | ||
168 | void drm_master_put(struct drm_master **master) | |
169 | { | |
170 | kref_put(&(*master)->refcount, drm_master_destroy); | |
171 | *master = NULL; | |
172 | } | |
85bb0c37 | 173 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
174 | |
175 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
176 | struct drm_file *file_priv) | |
177 | { | |
53ef1600 | 178 | int ret = 0; |
862302ff | 179 | |
c996fd0b | 180 | mutex_lock(&dev->master_mutex); |
48ba8137 | 181 | if (drm_is_master(file_priv)) |
c996fd0b | 182 | goto out_unlock; |
7c1c2871 | 183 | |
c996fd0b TH |
184 | if (file_priv->minor->master) { |
185 | ret = -EINVAL; | |
186 | goto out_unlock; | |
187 | } | |
7c1c2871 | 188 | |
c996fd0b TH |
189 | if (!file_priv->master) { |
190 | ret = -EINVAL; | |
191 | goto out_unlock; | |
192 | } | |
08bec5b4 | 193 | |
08bec5b4 | 194 | file_priv->minor->master = drm_master_get(file_priv->master); |
08bec5b4 DH |
195 | if (dev->driver->master_set) { |
196 | ret = dev->driver->master_set(dev, file_priv, false); | |
48ba8137 | 197 | if (unlikely(ret != 0)) |
08bec5b4 | 198 | drm_master_put(&file_priv->minor->master); |
7c1c2871 DA |
199 | } |
200 | ||
c996fd0b TH |
201 | out_unlock: |
202 | mutex_unlock(&dev->master_mutex); | |
53ef1600 | 203 | return ret; |
7c1c2871 DA |
204 | } |
205 | ||
206 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
207 | struct drm_file *file_priv) | |
208 | { | |
c996fd0b TH |
209 | int ret = -EINVAL; |
210 | ||
211 | mutex_lock(&dev->master_mutex); | |
48ba8137 | 212 | if (!drm_is_master(file_priv)) |
c996fd0b | 213 | goto out_unlock; |
6b008426 | 214 | |
07f1c7a7 | 215 | if (!file_priv->minor->master) |
c996fd0b | 216 | goto out_unlock; |
07f1c7a7 | 217 | |
c996fd0b | 218 | ret = 0; |
862302ff TH |
219 | if (dev->driver->master_drop) |
220 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 221 | drm_master_put(&file_priv->minor->master); |
c996fd0b TH |
222 | |
223 | out_unlock: | |
224 | mutex_unlock(&dev->master_mutex); | |
225 | return ret; | |
7c1c2871 DA |
226 | } |
227 | ||
0d639883 DH |
228 | /* |
229 | * DRM Minors | |
230 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
231 | * of them is represented by a drm_minor object. Depending on the capabilities | |
232 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 233 | * |
0d639883 DH |
234 | * Minors can be accessed via dev->$minor_name. This pointer is either |
235 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
236 | * valid. This means, DRM minors have the same life-time as the underlying | |
237 | * device. However, this doesn't mean that the minor is active. Minors are | |
238 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 239 | */ |
0d639883 | 240 | |
05b701f6 DH |
241 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
242 | unsigned int type) | |
243 | { | |
244 | switch (type) { | |
245 | case DRM_MINOR_LEGACY: | |
246 | return &dev->primary; | |
247 | case DRM_MINOR_RENDER: | |
248 | return &dev->render; | |
249 | case DRM_MINOR_CONTROL: | |
250 | return &dev->control; | |
251 | default: | |
252 | return NULL; | |
253 | } | |
254 | } | |
255 | ||
256 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
257 | { | |
258 | struct drm_minor *minor; | |
259 | ||
260 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
261 | if (!minor) | |
262 | return -ENOMEM; | |
263 | ||
264 | minor->type = type; | |
265 | minor->dev = dev; | |
05b701f6 DH |
266 | |
267 | *drm_minor_get_slot(dev, type) = minor; | |
268 | return 0; | |
269 | } | |
270 | ||
bd9dfa98 DH |
271 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
272 | { | |
273 | struct drm_minor **slot; | |
274 | ||
275 | slot = drm_minor_get_slot(dev, type); | |
276 | if (*slot) { | |
ad222799 | 277 | drm_mode_group_destroy(&(*slot)->mode_group); |
bd9dfa98 DH |
278 | kfree(*slot); |
279 | *slot = NULL; | |
280 | } | |
281 | } | |
282 | ||
afcdbc86 | 283 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 284 | { |
2c14f28b | 285 | struct drm_minor *new_minor; |
0d639883 | 286 | unsigned long flags; |
1da177e4 | 287 | int ret; |
2c14f28b | 288 | int minor_id; |
1da177e4 LT |
289 | |
290 | DRM_DEBUG("\n"); | |
291 | ||
05b701f6 DH |
292 | new_minor = *drm_minor_get_slot(dev, type); |
293 | if (!new_minor) | |
294 | return 0; | |
295 | ||
0d639883 DH |
296 | idr_preload(GFP_KERNEL); |
297 | spin_lock_irqsave(&drm_minor_lock, flags); | |
7d86cf1a DH |
298 | minor_id = idr_alloc(&drm_minors_idr, |
299 | NULL, | |
300 | 64 * type, | |
301 | 64 * (type + 1), | |
0d639883 DH |
302 | GFP_NOWAIT); |
303 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
304 | idr_preload_end(); | |
7d86cf1a | 305 | |
2c14f28b DA |
306 | if (minor_id < 0) |
307 | return minor_id; | |
308 | ||
2c14f28b | 309 | new_minor->index = minor_id; |
2c14f28b | 310 | |
955b12de BG |
311 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
312 | if (ret) { | |
156f5a78 | 313 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
1abbc437 | 314 | goto err_id; |
955b12de | 315 | } |
2c14f28b DA |
316 | |
317 | ret = drm_sysfs_device_add(new_minor); | |
318 | if (ret) { | |
1abbc437 | 319 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
cb6458f9 | 320 | goto err_debugfs; |
1da177e4 | 321 | } |
2c14f28b | 322 | |
0d639883 DH |
323 | /* replace NULL with @minor so lookups will succeed from now on */ |
324 | spin_lock_irqsave(&drm_minor_lock, flags); | |
325 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); | |
326 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
2c14f28b DA |
327 | |
328 | DRM_DEBUG("new minor assigned %d\n", minor_id); | |
329 | return 0; | |
330 | ||
cb6458f9 | 331 | err_debugfs: |
cb6458f9 | 332 | drm_debugfs_cleanup(new_minor); |
1abbc437 | 333 | err_id: |
0d639883 | 334 | spin_lock_irqsave(&drm_minor_lock, flags); |
2c14f28b | 335 | idr_remove(&drm_minors_idr, minor_id); |
0d639883 DH |
336 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
337 | new_minor->index = 0; | |
1da177e4 LT |
338 | return ret; |
339 | } | |
b5e89ed5 | 340 | |
afcdbc86 | 341 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 342 | { |
afcdbc86 | 343 | struct drm_minor *minor; |
0d639883 | 344 | unsigned long flags; |
afcdbc86 DH |
345 | |
346 | minor = *drm_minor_get_slot(dev, type); | |
a3483353 | 347 | if (!minor || !minor->kdev) |
f73aca50 DH |
348 | return; |
349 | ||
0d639883 DH |
350 | spin_lock_irqsave(&drm_minor_lock, flags); |
351 | idr_remove(&drm_minors_idr, minor->index); | |
352 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
353 | minor->index = 0; | |
865fb47f | 354 | |
865fb47f | 355 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
356 | drm_sysfs_device_remove(minor); |
357 | } | |
358 | ||
359 | /** | |
1616c525 DH |
360 | * drm_minor_acquire - Acquire a DRM minor |
361 | * @minor_id: Minor ID of the DRM-minor | |
362 | * | |
363 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
364 | * refence-count of the underlying device is increased so you must release this | |
365 | * object with drm_minor_release(). | |
366 | * | |
367 | * As long as you hold this minor, it is guaranteed that the object and the | |
368 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
369 | * unregistered while you hold the minor. | |
f73aca50 | 370 | * |
1616c525 DH |
371 | * Returns: |
372 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
373 | * failure. | |
1da177e4 | 374 | */ |
1616c525 | 375 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 376 | { |
1616c525 | 377 | struct drm_minor *minor; |
0d639883 | 378 | unsigned long flags; |
1616c525 | 379 | |
0d639883 | 380 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 381 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
382 | if (minor) |
383 | drm_dev_ref(minor->dev); | |
384 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
385 | ||
386 | if (!minor) { | |
387 | return ERR_PTR(-ENODEV); | |
388 | } else if (drm_device_is_unplugged(minor->dev)) { | |
389 | drm_dev_unref(minor->dev); | |
1616c525 | 390 | return ERR_PTR(-ENODEV); |
0d639883 | 391 | } |
673a394b | 392 | |
1616c525 DH |
393 | return minor; |
394 | } | |
b5e89ed5 | 395 | |
1616c525 DH |
396 | /** |
397 | * drm_minor_release - Release DRM minor | |
398 | * @minor: Pointer to DRM minor object | |
399 | * | |
400 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
401 | */ | |
402 | void drm_minor_release(struct drm_minor *minor) | |
403 | { | |
404 | drm_dev_unref(minor->dev); | |
1da177e4 | 405 | } |
112b715e KH |
406 | |
407 | /** | |
c6a1af8a TR |
408 | * drm_put_dev - Unregister and release a DRM device |
409 | * @dev: DRM device | |
112b715e | 410 | * |
c6a1af8a | 411 | * Called at module unload time or when a PCI device is unplugged. |
112b715e | 412 | * |
c6a1af8a TR |
413 | * Use of this function is discouraged. It will eventually go away completely. |
414 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. | |
415 | * | |
416 | * Cleans up all DRM device, calling drm_lastclose(). | |
112b715e KH |
417 | */ |
418 | void drm_put_dev(struct drm_device *dev) | |
419 | { | |
112b715e KH |
420 | DRM_DEBUG("\n"); |
421 | ||
422 | if (!dev) { | |
423 | DRM_ERROR("cleanup called no dev\n"); | |
424 | return; | |
425 | } | |
426 | ||
c3a49737 | 427 | drm_dev_unregister(dev); |
099d1c29 | 428 | drm_dev_unref(dev); |
112b715e KH |
429 | } |
430 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
431 | |
432 | void drm_unplug_dev(struct drm_device *dev) | |
433 | { | |
434 | /* for a USB device */ | |
afcdbc86 DH |
435 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
436 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
437 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
438 | |
439 | mutex_lock(&drm_global_mutex); | |
440 | ||
441 | drm_device_set_unplugged(dev); | |
442 | ||
443 | if (dev->open_count == 0) { | |
444 | drm_put_dev(dev); | |
445 | } | |
446 | mutex_unlock(&drm_global_mutex); | |
447 | } | |
448 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 449 | |
31bbe16f DH |
450 | /* |
451 | * DRM internal mount | |
452 | * We want to be able to allocate our own "struct address_space" to control | |
453 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
454 | * stand-alone address_space objects, so we need an underlying inode. As there | |
455 | * is no way to allocate an independent inode easily, we need a fake internal | |
456 | * VFS mount-point. | |
457 | * | |
458 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
459 | * frees it again. You are allowed to use iget() and iput() to get references to | |
460 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
461 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
462 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
463 | * between multiple inode-users. You could, technically, call | |
464 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
465 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
466 | */ | |
467 | ||
468 | static int drm_fs_cnt; | |
469 | static struct vfsmount *drm_fs_mnt; | |
470 | ||
471 | static const struct dentry_operations drm_fs_dops = { | |
472 | .d_dname = simple_dname, | |
473 | }; | |
474 | ||
475 | static const struct super_operations drm_fs_sops = { | |
476 | .statfs = simple_statfs, | |
477 | }; | |
478 | ||
479 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
480 | const char *dev_name, void *data) | |
481 | { | |
482 | return mount_pseudo(fs_type, | |
483 | "drm:", | |
484 | &drm_fs_sops, | |
485 | &drm_fs_dops, | |
486 | 0x010203ff); | |
487 | } | |
488 | ||
489 | static struct file_system_type drm_fs_type = { | |
490 | .name = "drm", | |
491 | .owner = THIS_MODULE, | |
492 | .mount = drm_fs_mount, | |
493 | .kill_sb = kill_anon_super, | |
494 | }; | |
495 | ||
496 | static struct inode *drm_fs_inode_new(void) | |
497 | { | |
498 | struct inode *inode; | |
499 | int r; | |
500 | ||
501 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
502 | if (r < 0) { | |
503 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
504 | return ERR_PTR(r); | |
505 | } | |
506 | ||
507 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
508 | if (IS_ERR(inode)) | |
509 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
510 | ||
511 | return inode; | |
512 | } | |
513 | ||
514 | static void drm_fs_inode_free(struct inode *inode) | |
515 | { | |
516 | if (inode) { | |
517 | iput(inode); | |
518 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
519 | } | |
520 | } | |
521 | ||
1bb72532 | 522 | /** |
c6a1af8a | 523 | * drm_dev_alloc - Allocate new DRM device |
1bb72532 DH |
524 | * @driver: DRM driver to allocate device for |
525 | * @parent: Parent device object | |
526 | * | |
527 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
528 | * Call drm_dev_register() to advertice the device to user space and register it |
529 | * with other core subsystems. | |
1bb72532 | 530 | * |
099d1c29 DH |
531 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
532 | * drm_dev_unref() to take and drop further ref-counts. | |
533 | * | |
1bb72532 DH |
534 | * RETURNS: |
535 | * Pointer to new DRM device, or NULL if out of memory. | |
536 | */ | |
537 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
538 | struct device *parent) | |
539 | { | |
540 | struct drm_device *dev; | |
541 | int ret; | |
542 | ||
543 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
544 | if (!dev) | |
545 | return NULL; | |
546 | ||
099d1c29 | 547 | kref_init(&dev->ref); |
1bb72532 DH |
548 | dev->dev = parent; |
549 | dev->driver = driver; | |
550 | ||
551 | INIT_LIST_HEAD(&dev->filelist); | |
552 | INIT_LIST_HEAD(&dev->ctxlist); | |
553 | INIT_LIST_HEAD(&dev->vmalist); | |
554 | INIT_LIST_HEAD(&dev->maplist); | |
555 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
556 | ||
2177a218 | 557 | spin_lock_init(&dev->buf_lock); |
1bb72532 DH |
558 | spin_lock_init(&dev->event_lock); |
559 | mutex_init(&dev->struct_mutex); | |
560 | mutex_init(&dev->ctxlist_mutex); | |
c996fd0b | 561 | mutex_init(&dev->master_mutex); |
1bb72532 | 562 | |
6796cb16 DH |
563 | dev->anon_inode = drm_fs_inode_new(); |
564 | if (IS_ERR(dev->anon_inode)) { | |
565 | ret = PTR_ERR(dev->anon_inode); | |
566 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 567 | goto err_free; |
6796cb16 DH |
568 | } |
569 | ||
05b701f6 DH |
570 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
571 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
572 | if (ret) | |
573 | goto err_minors; | |
574 | } | |
575 | ||
6d6dfcfb | 576 | if (drm_core_check_feature(dev, DRIVER_RENDER)) { |
05b701f6 DH |
577 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
578 | if (ret) | |
579 | goto err_minors; | |
580 | } | |
581 | ||
582 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
583 | if (ret) | |
584 | goto err_minors; | |
585 | ||
6796cb16 | 586 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 587 | goto err_minors; |
1bb72532 DH |
588 | |
589 | ret = drm_ctxbitmap_init(dev); | |
590 | if (ret) { | |
591 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
592 | goto err_ht; | |
593 | } | |
594 | ||
595 | if (driver->driver_features & DRIVER_GEM) { | |
596 | ret = drm_gem_init(dev); | |
597 | if (ret) { | |
598 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
599 | goto err_ctxbitmap; | |
600 | } | |
601 | } | |
602 | ||
603 | return dev; | |
604 | ||
605 | err_ctxbitmap: | |
606 | drm_ctxbitmap_cleanup(dev); | |
607 | err_ht: | |
608 | drm_ht_remove(&dev->map_hash); | |
05b701f6 | 609 | err_minors: |
bd9dfa98 DH |
610 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
611 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
612 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 613 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 | 614 | err_free: |
c996fd0b | 615 | mutex_destroy(&dev->master_mutex); |
1bb72532 DH |
616 | kfree(dev); |
617 | return NULL; | |
618 | } | |
619 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 620 | |
099d1c29 | 621 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 622 | { |
099d1c29 | 623 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 624 | |
0dc8fe59 DH |
625 | if (dev->driver->driver_features & DRIVER_GEM) |
626 | drm_gem_destroy(dev); | |
627 | ||
628 | drm_ctxbitmap_cleanup(dev); | |
629 | drm_ht_remove(&dev->map_hash); | |
6796cb16 | 630 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 631 | |
bd9dfa98 DH |
632 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
633 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
634 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
635 | ||
c996fd0b | 636 | mutex_destroy(&dev->master_mutex); |
ca8e2ad7 | 637 | kfree(dev->unique); |
0dc8fe59 DH |
638 | kfree(dev); |
639 | } | |
099d1c29 DH |
640 | |
641 | /** | |
642 | * drm_dev_ref - Take reference of a DRM device | |
643 | * @dev: device to take reference of or NULL | |
644 | * | |
645 | * This increases the ref-count of @dev by one. You *must* already own a | |
646 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
647 | * again. | |
648 | * | |
649 | * This function never fails. However, this function does not provide *any* | |
650 | * guarantee whether the device is alive or running. It only provides a | |
651 | * reference to the object and the memory associated with it. | |
652 | */ | |
653 | void drm_dev_ref(struct drm_device *dev) | |
654 | { | |
655 | if (dev) | |
656 | kref_get(&dev->ref); | |
657 | } | |
658 | EXPORT_SYMBOL(drm_dev_ref); | |
659 | ||
660 | /** | |
661 | * drm_dev_unref - Drop reference of a DRM device | |
662 | * @dev: device to drop reference of or NULL | |
663 | * | |
664 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
665 | * ref-count drops to zero. | |
666 | */ | |
667 | void drm_dev_unref(struct drm_device *dev) | |
668 | { | |
669 | if (dev) | |
670 | kref_put(&dev->ref, drm_dev_release); | |
671 | } | |
672 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 673 | |
c22f0ace DH |
674 | /** |
675 | * drm_dev_register - Register DRM device | |
676 | * @dev: Device to register | |
c6a1af8a | 677 | * @flags: Flags passed to the driver's .load() function |
c22f0ace DH |
678 | * |
679 | * Register the DRM device @dev with the system, advertise device to user-space | |
680 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
681 | * previously. | |
682 | * | |
683 | * Never call this twice on any device! | |
684 | * | |
685 | * RETURNS: | |
686 | * 0 on success, negative error code on failure. | |
687 | */ | |
688 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
689 | { | |
690 | int ret; | |
691 | ||
692 | mutex_lock(&drm_global_mutex); | |
693 | ||
afcdbc86 | 694 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
695 | if (ret) |
696 | goto err_minors; | |
c22f0ace | 697 | |
afcdbc86 | 698 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
699 | if (ret) |
700 | goto err_minors; | |
c22f0ace | 701 | |
afcdbc86 | 702 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 703 | if (ret) |
05b701f6 | 704 | goto err_minors; |
c22f0ace DH |
705 | |
706 | if (dev->driver->load) { | |
707 | ret = dev->driver->load(dev, flags); | |
708 | if (ret) | |
05b701f6 | 709 | goto err_minors; |
c22f0ace DH |
710 | } |
711 | ||
712 | /* setup grouping for legacy outputs */ | |
713 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
714 | ret = drm_mode_group_init_legacy_group(dev, | |
715 | &dev->primary->mode_group); | |
716 | if (ret) | |
717 | goto err_unload; | |
718 | } | |
719 | ||
c22f0ace DH |
720 | ret = 0; |
721 | goto out_unlock; | |
722 | ||
723 | err_unload: | |
724 | if (dev->driver->unload) | |
725 | dev->driver->unload(dev); | |
05b701f6 | 726 | err_minors: |
afcdbc86 DH |
727 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
728 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
729 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
730 | out_unlock: |
731 | mutex_unlock(&drm_global_mutex); | |
732 | return ret; | |
733 | } | |
734 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
735 | |
736 | /** | |
737 | * drm_dev_unregister - Unregister DRM device | |
738 | * @dev: Device to unregister | |
739 | * | |
740 | * Unregister the DRM device from the system. This does the reverse of | |
741 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 742 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
743 | */ |
744 | void drm_dev_unregister(struct drm_device *dev) | |
745 | { | |
746 | struct drm_map_list *r_list, *list_temp; | |
747 | ||
748 | drm_lastclose(dev); | |
749 | ||
750 | if (dev->driver->unload) | |
751 | dev->driver->unload(dev); | |
752 | ||
4efafebe DV |
753 | if (dev->agp) |
754 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
755 | |
756 | drm_vblank_cleanup(dev); | |
757 | ||
758 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
759 | drm_rmmap(dev, r_list->map); | |
760 | ||
afcdbc86 DH |
761 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
762 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
763 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
764 | } |
765 | EXPORT_SYMBOL(drm_dev_unregister); | |
ca8e2ad7 TR |
766 | |
767 | /** | |
768 | * drm_dev_set_unique - Set the unique name of a DRM device | |
769 | * @dev: device of which to set the unique name | |
770 | * @fmt: format string for unique name | |
771 | * | |
772 | * Sets the unique name of a DRM device using the specified format string and | |
773 | * a variable list of arguments. Drivers can use this at driver probe time if | |
774 | * the unique name of the devices they drive is static. | |
775 | * | |
776 | * Return: 0 on success or a negative error code on failure. | |
777 | */ | |
778 | int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) | |
779 | { | |
780 | va_list ap; | |
781 | ||
782 | kfree(dev->unique); | |
783 | ||
784 | va_start(ap, fmt); | |
785 | dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); | |
786 | va_end(ap); | |
787 | ||
788 | return dev->unique ? 0 : -ENOMEM; | |
789 | } | |
790 | EXPORT_SYMBOL(drm_dev_set_unique); | |
1b7199fe DH |
791 | |
792 | /* | |
793 | * DRM Core | |
794 | * The DRM core module initializes all global DRM objects and makes them | |
795 | * available to drivers. Once setup, drivers can probe their respective | |
796 | * devices. | |
797 | * Currently, core management includes: | |
798 | * - The "DRM-Global" key/value database | |
799 | * - Global ID management for connectors | |
800 | * - DRM major number allocation | |
801 | * - DRM minor management | |
802 | * - DRM sysfs class | |
803 | * - DRM debugfs root | |
804 | * | |
805 | * Furthermore, the DRM core provides dynamic char-dev lookups. For each | |
806 | * interface registered on a DRM device, you can request minor numbers from DRM | |
807 | * core. DRM core takes care of major-number management and char-dev | |
808 | * registration. A stub ->open() callback forwards any open() requests to the | |
809 | * registered minor. | |
810 | */ | |
811 | ||
812 | static int drm_stub_open(struct inode *inode, struct file *filp) | |
813 | { | |
814 | const struct file_operations *new_fops; | |
815 | struct drm_minor *minor; | |
816 | int err; | |
817 | ||
818 | DRM_DEBUG("\n"); | |
819 | ||
820 | mutex_lock(&drm_global_mutex); | |
821 | minor = drm_minor_acquire(iminor(inode)); | |
822 | if (IS_ERR(minor)) { | |
823 | err = PTR_ERR(minor); | |
824 | goto out_unlock; | |
825 | } | |
826 | ||
827 | new_fops = fops_get(minor->dev->driver->fops); | |
828 | if (!new_fops) { | |
829 | err = -ENODEV; | |
830 | goto out_release; | |
831 | } | |
832 | ||
833 | replace_fops(filp, new_fops); | |
834 | if (filp->f_op->open) | |
835 | err = filp->f_op->open(inode, filp); | |
836 | else | |
837 | err = 0; | |
838 | ||
839 | out_release: | |
840 | drm_minor_release(minor); | |
841 | out_unlock: | |
842 | mutex_unlock(&drm_global_mutex); | |
843 | return err; | |
844 | } | |
845 | ||
846 | static const struct file_operations drm_stub_fops = { | |
847 | .owner = THIS_MODULE, | |
848 | .open = drm_stub_open, | |
849 | .llseek = noop_llseek, | |
850 | }; | |
851 | ||
852 | static int __init drm_core_init(void) | |
853 | { | |
854 | int ret = -ENOMEM; | |
855 | ||
856 | drm_global_init(); | |
857 | drm_connector_ida_init(); | |
858 | idr_init(&drm_minors_idr); | |
859 | ||
860 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
861 | goto err_p1; | |
862 | ||
863 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); | |
864 | if (IS_ERR(drm_class)) { | |
865 | printk(KERN_ERR "DRM: Error creating drm class.\n"); | |
866 | ret = PTR_ERR(drm_class); | |
867 | goto err_p2; | |
868 | } | |
869 | ||
870 | drm_debugfs_root = debugfs_create_dir("dri", NULL); | |
871 | if (!drm_debugfs_root) { | |
872 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); | |
873 | ret = -1; | |
874 | goto err_p3; | |
875 | } | |
876 | ||
877 | DRM_INFO("Initialized %s %d.%d.%d %s\n", | |
878 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
879 | return 0; | |
880 | err_p3: | |
881 | drm_sysfs_destroy(); | |
882 | err_p2: | |
883 | unregister_chrdev(DRM_MAJOR, "drm"); | |
884 | ||
885 | idr_destroy(&drm_minors_idr); | |
886 | err_p1: | |
887 | return ret; | |
888 | } | |
889 | ||
890 | static void __exit drm_core_exit(void) | |
891 | { | |
892 | debugfs_remove(drm_debugfs_root); | |
893 | drm_sysfs_destroy(); | |
894 | ||
895 | unregister_chrdev(DRM_MAJOR, "drm"); | |
896 | ||
897 | drm_connector_ida_destroy(); | |
898 | idr_destroy(&drm_minors_idr); | |
899 | } | |
900 | ||
901 | module_init(drm_core_init); | |
902 | module_exit(drm_core_exit); |