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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"); |
4ed0ce3d | 49 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)"); |
27641c3f | 50 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
c61eef72 | 51 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
1da177e4 | 52 | |
c0758146 | 53 | module_param_named(debug, drm_debug, int, 0600); |
1da177e4 | 54 | |
0d639883 | 55 | static DEFINE_SPINLOCK(drm_minor_lock); |
1b7199fe | 56 | static struct idr drm_minors_idr; |
2c14f28b | 57 | |
1b7199fe | 58 | static struct dentry *drm_debugfs_root; |
5ad3d883 | 59 | |
a1f1a79c | 60 | void drm_err(const char *format, ...) |
5ad3d883 JP |
61 | { |
62 | struct va_format vaf; | |
63 | va_list args; | |
5ad3d883 JP |
64 | |
65 | va_start(args, format); | |
66 | ||
67 | vaf.fmt = format; | |
68 | vaf.va = &args; | |
69 | ||
2ee762b3 | 70 | printk(KERN_ERR "[" DRM_NAME ":%ps] *ERROR* %pV", |
a1f1a79c | 71 | __builtin_return_address(0), &vaf); |
5ad3d883 JP |
72 | |
73 | va_end(args); | |
5ad3d883 JP |
74 | } |
75 | EXPORT_SYMBOL(drm_err); | |
76 | ||
1287aa90 | 77 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
4fefcb27 | 78 | { |
fffb9065 | 79 | struct va_format vaf; |
4fefcb27 | 80 | va_list args; |
1da177e4 | 81 | |
a73d4e91 LD |
82 | va_start(args, format); |
83 | vaf.fmt = format; | |
84 | vaf.va = &args; | |
85 | ||
0ed02983 | 86 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
a73d4e91 LD |
87 | |
88 | va_end(args); | |
4fefcb27 | 89 | } |
90 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 91 | |
7c1c2871 DA |
92 | struct drm_master *drm_master_create(struct drm_minor *minor) |
93 | { | |
94 | struct drm_master *master; | |
95 | ||
9a298b2a | 96 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
97 | if (!master) |
98 | return NULL; | |
99 | ||
100 | kref_init(&master->refcount); | |
101 | spin_lock_init(&master->lock.spinlock); | |
102 | init_waitqueue_head(&master->lock.lock_queue); | |
32e7b94a | 103 | idr_init(&master->magic_map); |
7c1c2871 DA |
104 | master->minor = minor; |
105 | ||
7c1c2871 DA |
106 | return master; |
107 | } | |
108 | ||
109 | struct drm_master *drm_master_get(struct drm_master *master) | |
110 | { | |
111 | kref_get(&master->refcount); | |
112 | return master; | |
113 | } | |
85bb0c37 | 114 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
115 | |
116 | static void drm_master_destroy(struct kref *kref) | |
117 | { | |
118 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
7c1c2871 | 119 | struct drm_device *dev = master->minor->dev; |
c1ff85d9 | 120 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 | 121 | |
c996fd0b | 122 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
123 | if (dev->driver->master_destroy) |
124 | dev->driver->master_destroy(dev, master); | |
125 | ||
c1ff85d9 DA |
126 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
127 | if (r_list->master == master) { | |
9fc5cde7 | 128 | drm_legacy_rmmap_locked(dev, r_list->map); |
c1ff85d9 DA |
129 | r_list = NULL; |
130 | } | |
131 | } | |
c996fd0b | 132 | mutex_unlock(&dev->struct_mutex); |
32e7b94a DH |
133 | |
134 | idr_destroy(&master->magic_map); | |
4a324d33 | 135 | kfree(master->unique); |
9a298b2a | 136 | kfree(master); |
7c1c2871 DA |
137 | } |
138 | ||
139 | void drm_master_put(struct drm_master **master) | |
140 | { | |
141 | kref_put(&(*master)->refcount, drm_master_destroy); | |
142 | *master = NULL; | |
143 | } | |
85bb0c37 | 144 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
145 | |
146 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
147 | struct drm_file *file_priv) | |
148 | { | |
53ef1600 | 149 | int ret = 0; |
862302ff | 150 | |
c996fd0b | 151 | mutex_lock(&dev->master_mutex); |
7963e9db | 152 | if (file_priv->is_master) |
c996fd0b | 153 | goto out_unlock; |
7c1c2871 | 154 | |
c996fd0b TH |
155 | if (file_priv->minor->master) { |
156 | ret = -EINVAL; | |
157 | goto out_unlock; | |
158 | } | |
7c1c2871 | 159 | |
c996fd0b TH |
160 | if (!file_priv->master) { |
161 | ret = -EINVAL; | |
162 | goto out_unlock; | |
163 | } | |
08bec5b4 | 164 | |
08bec5b4 | 165 | file_priv->minor->master = drm_master_get(file_priv->master); |
7963e9db | 166 | file_priv->is_master = 1; |
08bec5b4 DH |
167 | if (dev->driver->master_set) { |
168 | ret = dev->driver->master_set(dev, file_priv, false); | |
7963e9db DA |
169 | if (unlikely(ret != 0)) { |
170 | file_priv->is_master = 0; | |
08bec5b4 | 171 | drm_master_put(&file_priv->minor->master); |
7963e9db | 172 | } |
7c1c2871 DA |
173 | } |
174 | ||
c996fd0b TH |
175 | out_unlock: |
176 | mutex_unlock(&dev->master_mutex); | |
53ef1600 | 177 | return ret; |
7c1c2871 DA |
178 | } |
179 | ||
180 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
181 | struct drm_file *file_priv) | |
182 | { | |
c996fd0b TH |
183 | int ret = -EINVAL; |
184 | ||
185 | mutex_lock(&dev->master_mutex); | |
7963e9db | 186 | if (!file_priv->is_master) |
c996fd0b | 187 | goto out_unlock; |
6b008426 | 188 | |
07f1c7a7 | 189 | if (!file_priv->minor->master) |
c996fd0b | 190 | goto out_unlock; |
07f1c7a7 | 191 | |
c996fd0b | 192 | ret = 0; |
862302ff TH |
193 | if (dev->driver->master_drop) |
194 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 195 | drm_master_put(&file_priv->minor->master); |
7963e9db | 196 | file_priv->is_master = 0; |
c996fd0b TH |
197 | |
198 | out_unlock: | |
199 | mutex_unlock(&dev->master_mutex); | |
200 | return ret; | |
7c1c2871 DA |
201 | } |
202 | ||
0d639883 DH |
203 | /* |
204 | * DRM Minors | |
205 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
206 | * of them is represented by a drm_minor object. Depending on the capabilities | |
207 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 208 | * |
0d639883 DH |
209 | * Minors can be accessed via dev->$minor_name. This pointer is either |
210 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
211 | * valid. This means, DRM minors have the same life-time as the underlying | |
212 | * device. However, this doesn't mean that the minor is active. Minors are | |
213 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 214 | */ |
0d639883 | 215 | |
05b701f6 DH |
216 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
217 | unsigned int type) | |
218 | { | |
219 | switch (type) { | |
220 | case DRM_MINOR_LEGACY: | |
221 | return &dev->primary; | |
222 | case DRM_MINOR_RENDER: | |
223 | return &dev->render; | |
224 | case DRM_MINOR_CONTROL: | |
225 | return &dev->control; | |
226 | default: | |
227 | return NULL; | |
228 | } | |
229 | } | |
230 | ||
231 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
232 | { | |
233 | struct drm_minor *minor; | |
f1b85962 DH |
234 | unsigned long flags; |
235 | int r; | |
05b701f6 DH |
236 | |
237 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
238 | if (!minor) | |
239 | return -ENOMEM; | |
240 | ||
241 | minor->type = type; | |
242 | minor->dev = dev; | |
05b701f6 | 243 | |
f1b85962 DH |
244 | idr_preload(GFP_KERNEL); |
245 | spin_lock_irqsave(&drm_minor_lock, flags); | |
246 | r = idr_alloc(&drm_minors_idr, | |
247 | NULL, | |
248 | 64 * type, | |
249 | 64 * (type + 1), | |
250 | GFP_NOWAIT); | |
251 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
252 | idr_preload_end(); | |
253 | ||
254 | if (r < 0) | |
255 | goto err_free; | |
256 | ||
257 | minor->index = r; | |
258 | ||
e1728075 DH |
259 | minor->kdev = drm_sysfs_minor_alloc(minor); |
260 | if (IS_ERR(minor->kdev)) { | |
261 | r = PTR_ERR(minor->kdev); | |
262 | goto err_index; | |
263 | } | |
264 | ||
05b701f6 DH |
265 | *drm_minor_get_slot(dev, type) = minor; |
266 | return 0; | |
f1b85962 | 267 | |
e1728075 DH |
268 | err_index: |
269 | spin_lock_irqsave(&drm_minor_lock, flags); | |
270 | idr_remove(&drm_minors_idr, minor->index); | |
271 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
f1b85962 DH |
272 | err_free: |
273 | kfree(minor); | |
274 | return r; | |
05b701f6 DH |
275 | } |
276 | ||
bd9dfa98 DH |
277 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
278 | { | |
f1b85962 DH |
279 | struct drm_minor **slot, *minor; |
280 | unsigned long flags; | |
bd9dfa98 DH |
281 | |
282 | slot = drm_minor_get_slot(dev, type); | |
f1b85962 DH |
283 | minor = *slot; |
284 | if (!minor) | |
285 | return; | |
286 | ||
e1728075 | 287 | put_device(minor->kdev); |
f1b85962 DH |
288 | |
289 | spin_lock_irqsave(&drm_minor_lock, flags); | |
290 | idr_remove(&drm_minors_idr, minor->index); | |
291 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
292 | ||
293 | kfree(minor); | |
294 | *slot = NULL; | |
bd9dfa98 DH |
295 | } |
296 | ||
afcdbc86 | 297 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 298 | { |
f1b85962 | 299 | struct drm_minor *minor; |
0d639883 | 300 | unsigned long flags; |
1da177e4 | 301 | int ret; |
1da177e4 LT |
302 | |
303 | DRM_DEBUG("\n"); | |
304 | ||
f1b85962 DH |
305 | minor = *drm_minor_get_slot(dev, type); |
306 | if (!minor) | |
05b701f6 DH |
307 | return 0; |
308 | ||
f1b85962 | 309 | ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root); |
955b12de | 310 | if (ret) { |
156f5a78 | 311 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
f1b85962 | 312 | return ret; |
955b12de | 313 | } |
2c14f28b | 314 | |
e1728075 DH |
315 | ret = device_add(minor->kdev); |
316 | if (ret) | |
cb6458f9 | 317 | goto err_debugfs; |
2c14f28b | 318 | |
0d639883 DH |
319 | /* replace NULL with @minor so lookups will succeed from now on */ |
320 | spin_lock_irqsave(&drm_minor_lock, flags); | |
f1b85962 | 321 | idr_replace(&drm_minors_idr, minor, minor->index); |
0d639883 | 322 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
2c14f28b | 323 | |
f1b85962 | 324 | DRM_DEBUG("new minor registered %d\n", minor->index); |
2c14f28b DA |
325 | return 0; |
326 | ||
cb6458f9 | 327 | err_debugfs: |
f1b85962 | 328 | drm_debugfs_cleanup(minor); |
1da177e4 LT |
329 | return ret; |
330 | } | |
b5e89ed5 | 331 | |
afcdbc86 | 332 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 333 | { |
afcdbc86 | 334 | struct drm_minor *minor; |
0d639883 | 335 | unsigned long flags; |
afcdbc86 DH |
336 | |
337 | minor = *drm_minor_get_slot(dev, type); | |
e1728075 | 338 | if (!minor || !device_is_registered(minor->kdev)) |
f73aca50 DH |
339 | return; |
340 | ||
f1b85962 | 341 | /* replace @minor with NULL so lookups will fail from now on */ |
0d639883 | 342 | spin_lock_irqsave(&drm_minor_lock, flags); |
f1b85962 | 343 | idr_replace(&drm_minors_idr, NULL, minor->index); |
0d639883 | 344 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
865fb47f | 345 | |
e1728075 DH |
346 | device_del(minor->kdev); |
347 | dev_set_drvdata(minor->kdev, NULL); /* safety belt */ | |
865fb47f | 348 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
349 | } |
350 | ||
351 | /** | |
1616c525 DH |
352 | * drm_minor_acquire - Acquire a DRM minor |
353 | * @minor_id: Minor ID of the DRM-minor | |
354 | * | |
355 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
356 | * refence-count of the underlying device is increased so you must release this | |
357 | * object with drm_minor_release(). | |
358 | * | |
359 | * As long as you hold this minor, it is guaranteed that the object and the | |
360 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
361 | * unregistered while you hold the minor. | |
f73aca50 | 362 | * |
1616c525 DH |
363 | * Returns: |
364 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
365 | * failure. | |
1da177e4 | 366 | */ |
1616c525 | 367 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 368 | { |
1616c525 | 369 | struct drm_minor *minor; |
0d639883 | 370 | unsigned long flags; |
1616c525 | 371 | |
0d639883 | 372 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 373 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
374 | if (minor) |
375 | drm_dev_ref(minor->dev); | |
376 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
377 | ||
378 | if (!minor) { | |
379 | return ERR_PTR(-ENODEV); | |
380 | } else if (drm_device_is_unplugged(minor->dev)) { | |
381 | drm_dev_unref(minor->dev); | |
1616c525 | 382 | return ERR_PTR(-ENODEV); |
0d639883 | 383 | } |
673a394b | 384 | |
1616c525 DH |
385 | return minor; |
386 | } | |
b5e89ed5 | 387 | |
1616c525 DH |
388 | /** |
389 | * drm_minor_release - Release DRM minor | |
390 | * @minor: Pointer to DRM minor object | |
391 | * | |
392 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
393 | */ | |
394 | void drm_minor_release(struct drm_minor *minor) | |
395 | { | |
396 | drm_dev_unref(minor->dev); | |
1da177e4 | 397 | } |
112b715e KH |
398 | |
399 | /** | |
c6a1af8a TR |
400 | * drm_put_dev - Unregister and release a DRM device |
401 | * @dev: DRM device | |
112b715e | 402 | * |
c6a1af8a | 403 | * Called at module unload time or when a PCI device is unplugged. |
112b715e | 404 | * |
c6a1af8a TR |
405 | * Use of this function is discouraged. It will eventually go away completely. |
406 | * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead. | |
407 | * | |
408 | * Cleans up all DRM device, calling drm_lastclose(). | |
112b715e KH |
409 | */ |
410 | void drm_put_dev(struct drm_device *dev) | |
411 | { | |
112b715e KH |
412 | DRM_DEBUG("\n"); |
413 | ||
414 | if (!dev) { | |
415 | DRM_ERROR("cleanup called no dev\n"); | |
416 | return; | |
417 | } | |
418 | ||
c3a49737 | 419 | drm_dev_unregister(dev); |
099d1c29 | 420 | drm_dev_unref(dev); |
112b715e KH |
421 | } |
422 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
423 | |
424 | void drm_unplug_dev(struct drm_device *dev) | |
425 | { | |
426 | /* for a USB device */ | |
afcdbc86 DH |
427 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
428 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
429 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
430 | |
431 | mutex_lock(&drm_global_mutex); | |
432 | ||
433 | drm_device_set_unplugged(dev); | |
434 | ||
435 | if (dev->open_count == 0) { | |
436 | drm_put_dev(dev); | |
437 | } | |
438 | mutex_unlock(&drm_global_mutex); | |
439 | } | |
440 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 441 | |
31bbe16f DH |
442 | /* |
443 | * DRM internal mount | |
444 | * We want to be able to allocate our own "struct address_space" to control | |
445 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
446 | * stand-alone address_space objects, so we need an underlying inode. As there | |
447 | * is no way to allocate an independent inode easily, we need a fake internal | |
448 | * VFS mount-point. | |
449 | * | |
450 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
451 | * frees it again. You are allowed to use iget() and iput() to get references to | |
452 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
453 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
454 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
455 | * between multiple inode-users. You could, technically, call | |
456 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
457 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
458 | */ | |
459 | ||
460 | static int drm_fs_cnt; | |
461 | static struct vfsmount *drm_fs_mnt; | |
462 | ||
463 | static const struct dentry_operations drm_fs_dops = { | |
464 | .d_dname = simple_dname, | |
465 | }; | |
466 | ||
467 | static const struct super_operations drm_fs_sops = { | |
468 | .statfs = simple_statfs, | |
469 | }; | |
470 | ||
471 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
472 | const char *dev_name, void *data) | |
473 | { | |
474 | return mount_pseudo(fs_type, | |
475 | "drm:", | |
476 | &drm_fs_sops, | |
477 | &drm_fs_dops, | |
478 | 0x010203ff); | |
479 | } | |
480 | ||
481 | static struct file_system_type drm_fs_type = { | |
482 | .name = "drm", | |
483 | .owner = THIS_MODULE, | |
484 | .mount = drm_fs_mount, | |
485 | .kill_sb = kill_anon_super, | |
486 | }; | |
487 | ||
488 | static struct inode *drm_fs_inode_new(void) | |
489 | { | |
490 | struct inode *inode; | |
491 | int r; | |
492 | ||
493 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
494 | if (r < 0) { | |
495 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
496 | return ERR_PTR(r); | |
497 | } | |
498 | ||
499 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
500 | if (IS_ERR(inode)) | |
501 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
502 | ||
503 | return inode; | |
504 | } | |
505 | ||
506 | static void drm_fs_inode_free(struct inode *inode) | |
507 | { | |
508 | if (inode) { | |
509 | iput(inode); | |
510 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
511 | } | |
512 | } | |
513 | ||
1bb72532 | 514 | /** |
c6a1af8a | 515 | * drm_dev_alloc - Allocate new DRM device |
1bb72532 DH |
516 | * @driver: DRM driver to allocate device for |
517 | * @parent: Parent device object | |
518 | * | |
519 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
520 | * Call drm_dev_register() to advertice the device to user space and register it |
521 | * with other core subsystems. | |
1bb72532 | 522 | * |
099d1c29 DH |
523 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
524 | * drm_dev_unref() to take and drop further ref-counts. | |
525 | * | |
b0ff4b93 DV |
526 | * Note that for purely virtual devices @parent can be NULL. |
527 | * | |
1bb72532 DH |
528 | * RETURNS: |
529 | * Pointer to new DRM device, or NULL if out of memory. | |
530 | */ | |
531 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
532 | struct device *parent) | |
533 | { | |
534 | struct drm_device *dev; | |
535 | int ret; | |
536 | ||
537 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
538 | if (!dev) | |
539 | return NULL; | |
540 | ||
099d1c29 | 541 | kref_init(&dev->ref); |
1bb72532 DH |
542 | dev->dev = parent; |
543 | dev->driver = driver; | |
544 | ||
545 | INIT_LIST_HEAD(&dev->filelist); | |
546 | INIT_LIST_HEAD(&dev->ctxlist); | |
547 | INIT_LIST_HEAD(&dev->vmalist); | |
548 | INIT_LIST_HEAD(&dev->maplist); | |
549 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
550 | ||
2177a218 | 551 | spin_lock_init(&dev->buf_lock); |
1bb72532 DH |
552 | spin_lock_init(&dev->event_lock); |
553 | mutex_init(&dev->struct_mutex); | |
554 | mutex_init(&dev->ctxlist_mutex); | |
c996fd0b | 555 | mutex_init(&dev->master_mutex); |
1bb72532 | 556 | |
6796cb16 DH |
557 | dev->anon_inode = drm_fs_inode_new(); |
558 | if (IS_ERR(dev->anon_inode)) { | |
559 | ret = PTR_ERR(dev->anon_inode); | |
560 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 561 | goto err_free; |
6796cb16 DH |
562 | } |
563 | ||
05b701f6 DH |
564 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
565 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
566 | if (ret) | |
567 | goto err_minors; | |
bcfe0c09 GP |
568 | |
569 | WARN_ON(driver->suspend || driver->resume); | |
05b701f6 DH |
570 | } |
571 | ||
6d6dfcfb | 572 | if (drm_core_check_feature(dev, DRIVER_RENDER)) { |
05b701f6 DH |
573 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
574 | if (ret) | |
575 | goto err_minors; | |
576 | } | |
577 | ||
578 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
579 | if (ret) | |
580 | goto err_minors; | |
581 | ||
6796cb16 | 582 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 583 | goto err_minors; |
1bb72532 | 584 | |
ba6976c1 | 585 | drm_legacy_ctxbitmap_init(dev); |
1bb72532 | 586 | |
1bcecfac | 587 | if (drm_core_check_feature(dev, DRIVER_GEM)) { |
1bb72532 DH |
588 | ret = drm_gem_init(dev); |
589 | if (ret) { | |
590 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
591 | goto err_ctxbitmap; | |
592 | } | |
593 | } | |
594 | ||
595 | return dev; | |
596 | ||
597 | err_ctxbitmap: | |
e7b96070 | 598 | drm_legacy_ctxbitmap_cleanup(dev); |
1bb72532 | 599 | drm_ht_remove(&dev->map_hash); |
05b701f6 | 600 | err_minors: |
bd9dfa98 DH |
601 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
602 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
603 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 604 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 | 605 | err_free: |
c996fd0b | 606 | mutex_destroy(&dev->master_mutex); |
1bb72532 DH |
607 | kfree(dev); |
608 | return NULL; | |
609 | } | |
610 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 611 | |
099d1c29 | 612 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 613 | { |
099d1c29 | 614 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 615 | |
1bcecfac | 616 | if (drm_core_check_feature(dev, DRIVER_GEM)) |
0dc8fe59 DH |
617 | drm_gem_destroy(dev); |
618 | ||
e7b96070 | 619 | drm_legacy_ctxbitmap_cleanup(dev); |
0dc8fe59 | 620 | drm_ht_remove(&dev->map_hash); |
6796cb16 | 621 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 622 | |
bd9dfa98 DH |
623 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
624 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
625 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
626 | ||
c996fd0b | 627 | mutex_destroy(&dev->master_mutex); |
ca8e2ad7 | 628 | kfree(dev->unique); |
0dc8fe59 DH |
629 | kfree(dev); |
630 | } | |
099d1c29 DH |
631 | |
632 | /** | |
633 | * drm_dev_ref - Take reference of a DRM device | |
634 | * @dev: device to take reference of or NULL | |
635 | * | |
636 | * This increases the ref-count of @dev by one. You *must* already own a | |
637 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
638 | * again. | |
639 | * | |
640 | * This function never fails. However, this function does not provide *any* | |
641 | * guarantee whether the device is alive or running. It only provides a | |
642 | * reference to the object and the memory associated with it. | |
643 | */ | |
644 | void drm_dev_ref(struct drm_device *dev) | |
645 | { | |
646 | if (dev) | |
647 | kref_get(&dev->ref); | |
648 | } | |
649 | EXPORT_SYMBOL(drm_dev_ref); | |
650 | ||
651 | /** | |
652 | * drm_dev_unref - Drop reference of a DRM device | |
653 | * @dev: device to drop reference of or NULL | |
654 | * | |
655 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
656 | * ref-count drops to zero. | |
657 | */ | |
658 | void drm_dev_unref(struct drm_device *dev) | |
659 | { | |
660 | if (dev) | |
661 | kref_put(&dev->ref, drm_dev_release); | |
662 | } | |
663 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 664 | |
c22f0ace DH |
665 | /** |
666 | * drm_dev_register - Register DRM device | |
667 | * @dev: Device to register | |
c6a1af8a | 668 | * @flags: Flags passed to the driver's .load() function |
c22f0ace DH |
669 | * |
670 | * Register the DRM device @dev with the system, advertise device to user-space | |
671 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
672 | * previously. | |
673 | * | |
674 | * Never call this twice on any device! | |
675 | * | |
676 | * RETURNS: | |
677 | * 0 on success, negative error code on failure. | |
678 | */ | |
679 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
680 | { | |
681 | int ret; | |
682 | ||
683 | mutex_lock(&drm_global_mutex); | |
684 | ||
afcdbc86 | 685 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
686 | if (ret) |
687 | goto err_minors; | |
c22f0ace | 688 | |
afcdbc86 | 689 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
690 | if (ret) |
691 | goto err_minors; | |
c22f0ace | 692 | |
afcdbc86 | 693 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 694 | if (ret) |
05b701f6 | 695 | goto err_minors; |
c22f0ace DH |
696 | |
697 | if (dev->driver->load) { | |
698 | ret = dev->driver->load(dev, flags); | |
699 | if (ret) | |
05b701f6 | 700 | goto err_minors; |
c22f0ace DH |
701 | } |
702 | ||
c22f0ace DH |
703 | ret = 0; |
704 | goto out_unlock; | |
705 | ||
05b701f6 | 706 | err_minors: |
afcdbc86 DH |
707 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
708 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
709 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
710 | out_unlock: |
711 | mutex_unlock(&drm_global_mutex); | |
712 | return ret; | |
713 | } | |
714 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
715 | |
716 | /** | |
717 | * drm_dev_unregister - Unregister DRM device | |
718 | * @dev: Device to unregister | |
719 | * | |
720 | * Unregister the DRM device from the system. This does the reverse of | |
721 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 722 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
723 | */ |
724 | void drm_dev_unregister(struct drm_device *dev) | |
725 | { | |
726 | struct drm_map_list *r_list, *list_temp; | |
727 | ||
728 | drm_lastclose(dev); | |
729 | ||
730 | if (dev->driver->unload) | |
731 | dev->driver->unload(dev); | |
732 | ||
4efafebe DV |
733 | if (dev->agp) |
734 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
735 | |
736 | drm_vblank_cleanup(dev); | |
737 | ||
738 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
9fc5cde7 | 739 | drm_legacy_rmmap(dev, r_list->map); |
c3a49737 | 740 | |
afcdbc86 DH |
741 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
742 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
743 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
744 | } |
745 | EXPORT_SYMBOL(drm_dev_unregister); | |
ca8e2ad7 TR |
746 | |
747 | /** | |
748 | * drm_dev_set_unique - Set the unique name of a DRM device | |
749 | * @dev: device of which to set the unique name | |
750 | * @fmt: format string for unique name | |
751 | * | |
752 | * Sets the unique name of a DRM device using the specified format string and | |
753 | * a variable list of arguments. Drivers can use this at driver probe time if | |
754 | * the unique name of the devices they drive is static. | |
755 | * | |
756 | * Return: 0 on success or a negative error code on failure. | |
757 | */ | |
758 | int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) | |
759 | { | |
760 | va_list ap; | |
761 | ||
762 | kfree(dev->unique); | |
763 | ||
764 | va_start(ap, fmt); | |
765 | dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); | |
766 | va_end(ap); | |
767 | ||
768 | return dev->unique ? 0 : -ENOMEM; | |
769 | } | |
770 | EXPORT_SYMBOL(drm_dev_set_unique); | |
1b7199fe DH |
771 | |
772 | /* | |
773 | * DRM Core | |
774 | * The DRM core module initializes all global DRM objects and makes them | |
775 | * available to drivers. Once setup, drivers can probe their respective | |
776 | * devices. | |
777 | * Currently, core management includes: | |
778 | * - The "DRM-Global" key/value database | |
779 | * - Global ID management for connectors | |
780 | * - DRM major number allocation | |
781 | * - DRM minor management | |
782 | * - DRM sysfs class | |
783 | * - DRM debugfs root | |
784 | * | |
785 | * Furthermore, the DRM core provides dynamic char-dev lookups. For each | |
786 | * interface registered on a DRM device, you can request minor numbers from DRM | |
787 | * core. DRM core takes care of major-number management and char-dev | |
788 | * registration. A stub ->open() callback forwards any open() requests to the | |
789 | * registered minor. | |
790 | */ | |
791 | ||
792 | static int drm_stub_open(struct inode *inode, struct file *filp) | |
793 | { | |
794 | const struct file_operations *new_fops; | |
795 | struct drm_minor *minor; | |
796 | int err; | |
797 | ||
798 | DRM_DEBUG("\n"); | |
799 | ||
800 | mutex_lock(&drm_global_mutex); | |
801 | minor = drm_minor_acquire(iminor(inode)); | |
802 | if (IS_ERR(minor)) { | |
803 | err = PTR_ERR(minor); | |
804 | goto out_unlock; | |
805 | } | |
806 | ||
807 | new_fops = fops_get(minor->dev->driver->fops); | |
808 | if (!new_fops) { | |
809 | err = -ENODEV; | |
810 | goto out_release; | |
811 | } | |
812 | ||
813 | replace_fops(filp, new_fops); | |
814 | if (filp->f_op->open) | |
815 | err = filp->f_op->open(inode, filp); | |
816 | else | |
817 | err = 0; | |
818 | ||
819 | out_release: | |
820 | drm_minor_release(minor); | |
821 | out_unlock: | |
822 | mutex_unlock(&drm_global_mutex); | |
823 | return err; | |
824 | } | |
825 | ||
826 | static const struct file_operations drm_stub_fops = { | |
827 | .owner = THIS_MODULE, | |
828 | .open = drm_stub_open, | |
829 | .llseek = noop_llseek, | |
830 | }; | |
831 | ||
832 | static int __init drm_core_init(void) | |
833 | { | |
834 | int ret = -ENOMEM; | |
835 | ||
836 | drm_global_init(); | |
837 | drm_connector_ida_init(); | |
838 | idr_init(&drm_minors_idr); | |
839 | ||
840 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
841 | goto err_p1; | |
842 | ||
fcc90213 DH |
843 | ret = drm_sysfs_init(); |
844 | if (ret < 0) { | |
1b7199fe | 845 | printk(KERN_ERR "DRM: Error creating drm class.\n"); |
1b7199fe DH |
846 | goto err_p2; |
847 | } | |
848 | ||
849 | drm_debugfs_root = debugfs_create_dir("dri", NULL); | |
850 | if (!drm_debugfs_root) { | |
851 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); | |
852 | ret = -1; | |
853 | goto err_p3; | |
854 | } | |
855 | ||
856 | DRM_INFO("Initialized %s %d.%d.%d %s\n", | |
857 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
858 | return 0; | |
859 | err_p3: | |
860 | drm_sysfs_destroy(); | |
861 | err_p2: | |
862 | unregister_chrdev(DRM_MAJOR, "drm"); | |
863 | ||
864 | idr_destroy(&drm_minors_idr); | |
865 | err_p1: | |
866 | return ret; | |
867 | } | |
868 | ||
869 | static void __exit drm_core_exit(void) | |
870 | { | |
871 | debugfs_remove(drm_debugfs_root); | |
872 | drm_sysfs_destroy(); | |
873 | ||
874 | unregister_chrdev(DRM_MAJOR, "drm"); | |
875 | ||
876 | drm_connector_ida_destroy(); | |
877 | idr_destroy(&drm_minors_idr); | |
878 | } | |
879 | ||
880 | module_init(drm_core_init); | |
881 | module_exit(drm_core_exit); |