Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /** |
2 | * \file drm_stub.h | |
3 | * Stub support | |
4 | * | |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org | |
10 | * | |
11 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. | |
12 | * All Rights Reserved. | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a | |
15 | * copy of this software and associated documentation files (the "Software"), | |
16 | * to deal in the Software without restriction, including without limitation | |
17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
18 | * and/or sell copies of the Software, and to permit persons to whom the | |
19 | * Software is furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice (including the next | |
22 | * paragraph) shall be included in all copies or substantial portions of the | |
23 | * Software. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
31 | * DEALINGS IN THE SOFTWARE. | |
32 | */ | |
33 | ||
31bbe16f | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/moduleparam.h> | |
31bbe16f | 37 | #include <linux/mount.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
760285e7 DH |
39 | #include <drm/drmP.h> |
40 | #include <drm/drm_core.h> | |
1da177e4 | 41 | |
b5e89ed5 | 42 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
1da177e4 LT |
43 | EXPORT_SYMBOL(drm_debug); |
44 | ||
1793126f DH |
45 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
46 | EXPORT_SYMBOL(drm_rnodes); | |
47 | ||
27641c3f MK |
48 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
49 | EXPORT_SYMBOL(drm_vblank_offdelay); | |
50 | ||
51 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ | |
52 | EXPORT_SYMBOL(drm_timestamp_precision); | |
53 | ||
c61eef72 ID |
54 | /* |
55 | * Default to use monotonic timestamps for wait-for-vblank and page-flip | |
56 | * complete events. | |
57 | */ | |
58 | unsigned int drm_timestamp_monotonic = 1; | |
59 | ||
b5e89ed5 DA |
60 | MODULE_AUTHOR(CORE_AUTHOR); |
61 | MODULE_DESCRIPTION(CORE_DESC); | |
1da177e4 | 62 | MODULE_LICENSE("GPL and additional rights"); |
1da177e4 | 63 | MODULE_PARM_DESC(debug, "Enable debug output"); |
1793126f | 64 | MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API"); |
27641c3f MK |
65 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
66 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); | |
c61eef72 | 67 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
1da177e4 | 68 | |
c0758146 | 69 | module_param_named(debug, drm_debug, int, 0600); |
1793126f | 70 | module_param_named(rnodes, drm_rnodes, int, 0600); |
27641c3f MK |
71 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
72 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); | |
c61eef72 | 73 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
1da177e4 | 74 | |
0d639883 | 75 | static DEFINE_SPINLOCK(drm_minor_lock); |
2c14f28b DA |
76 | struct idr drm_minors_idr; |
77 | ||
0650fd58 | 78 | struct class *drm_class; |
955b12de | 79 | struct dentry *drm_debugfs_root; |
5ad3d883 JP |
80 | |
81 | int drm_err(const char *func, const char *format, ...) | |
82 | { | |
83 | struct va_format vaf; | |
84 | va_list args; | |
85 | int r; | |
86 | ||
87 | va_start(args, format); | |
88 | ||
89 | vaf.fmt = format; | |
90 | vaf.va = &args; | |
91 | ||
92 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); | |
93 | ||
94 | va_end(args); | |
95 | ||
96 | return r; | |
97 | } | |
98 | EXPORT_SYMBOL(drm_err); | |
99 | ||
4fefcb27 | 100 | void drm_ut_debug_printk(unsigned int request_level, |
101 | const char *prefix, | |
102 | const char *function_name, | |
103 | const char *format, ...) | |
104 | { | |
fffb9065 | 105 | struct va_format vaf; |
4fefcb27 | 106 | va_list args; |
1da177e4 | 107 | |
4fefcb27 | 108 | if (drm_debug & request_level) { |
4fefcb27 | 109 | va_start(args, format); |
fffb9065 DV |
110 | vaf.fmt = format; |
111 | vaf.va = &args; | |
112 | ||
113 | if (function_name) | |
114 | printk(KERN_DEBUG "[%s:%s], %pV", prefix, | |
115 | function_name, &vaf); | |
116 | else | |
117 | printk(KERN_DEBUG "%pV", &vaf); | |
4fefcb27 | 118 | va_end(args); |
119 | } | |
120 | } | |
121 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 122 | |
7c1c2871 DA |
123 | struct drm_master *drm_master_create(struct drm_minor *minor) |
124 | { | |
125 | struct drm_master *master; | |
126 | ||
9a298b2a | 127 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
128 | if (!master) |
129 | return NULL; | |
130 | ||
131 | kref_init(&master->refcount); | |
132 | spin_lock_init(&master->lock.spinlock); | |
133 | init_waitqueue_head(&master->lock.lock_queue); | |
134 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); | |
135 | INIT_LIST_HEAD(&master->magicfree); | |
136 | master->minor = minor; | |
137 | ||
138 | list_add_tail(&master->head, &minor->master_list); | |
139 | ||
140 | return master; | |
141 | } | |
142 | ||
143 | struct drm_master *drm_master_get(struct drm_master *master) | |
144 | { | |
145 | kref_get(&master->refcount); | |
146 | return master; | |
147 | } | |
85bb0c37 | 148 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
149 | |
150 | static void drm_master_destroy(struct kref *kref) | |
151 | { | |
152 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
153 | struct drm_magic_entry *pt, *next; | |
154 | struct drm_device *dev = master->minor->dev; | |
c1ff85d9 | 155 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 DA |
156 | |
157 | list_del(&master->head); | |
158 | ||
159 | if (dev->driver->master_destroy) | |
160 | dev->driver->master_destroy(dev, master); | |
161 | ||
c1ff85d9 DA |
162 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
163 | if (r_list->master == master) { | |
164 | drm_rmmap_locked(dev, r_list->map); | |
165 | r_list = NULL; | |
166 | } | |
167 | } | |
168 | ||
7c1c2871 | 169 | if (master->unique) { |
9a298b2a | 170 | kfree(master->unique); |
7c1c2871 DA |
171 | master->unique = NULL; |
172 | master->unique_len = 0; | |
173 | } | |
174 | ||
6e35023f CW |
175 | kfree(dev->devname); |
176 | dev->devname = NULL; | |
177 | ||
7c1c2871 DA |
178 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
179 | list_del(&pt->head); | |
180 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); | |
9a298b2a | 181 | kfree(pt); |
7c1c2871 DA |
182 | } |
183 | ||
184 | drm_ht_remove(&master->magiclist); | |
185 | ||
9a298b2a | 186 | kfree(master); |
7c1c2871 DA |
187 | } |
188 | ||
189 | void drm_master_put(struct drm_master **master) | |
190 | { | |
191 | kref_put(&(*master)->refcount, drm_master_destroy); | |
192 | *master = NULL; | |
193 | } | |
85bb0c37 | 194 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
195 | |
196 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
197 | struct drm_file *file_priv) | |
198 | { | |
53ef1600 | 199 | int ret = 0; |
862302ff | 200 | |
6b008426 JB |
201 | if (file_priv->is_master) |
202 | return 0; | |
203 | ||
7c1c2871 DA |
204 | if (file_priv->minor->master && file_priv->minor->master != file_priv->master) |
205 | return -EINVAL; | |
206 | ||
207 | if (!file_priv->master) | |
208 | return -EINVAL; | |
209 | ||
08bec5b4 DH |
210 | if (file_priv->minor->master) |
211 | return -EINVAL; | |
212 | ||
213 | mutex_lock(&dev->struct_mutex); | |
214 | file_priv->minor->master = drm_master_get(file_priv->master); | |
215 | file_priv->is_master = 1; | |
216 | if (dev->driver->master_set) { | |
217 | ret = dev->driver->master_set(dev, file_priv, false); | |
218 | if (unlikely(ret != 0)) { | |
219 | file_priv->is_master = 0; | |
220 | drm_master_put(&file_priv->minor->master); | |
862302ff | 221 | } |
7c1c2871 | 222 | } |
08bec5b4 | 223 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 | 224 | |
53ef1600 | 225 | return ret; |
7c1c2871 DA |
226 | } |
227 | ||
228 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
229 | struct drm_file *file_priv) | |
230 | { | |
6b008426 | 231 | if (!file_priv->is_master) |
7c1c2871 | 232 | return -EINVAL; |
6b008426 | 233 | |
07f1c7a7 DA |
234 | if (!file_priv->minor->master) |
235 | return -EINVAL; | |
236 | ||
7c1c2871 | 237 | mutex_lock(&dev->struct_mutex); |
862302ff TH |
238 | if (dev->driver->master_drop) |
239 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 240 | drm_master_put(&file_priv->minor->master); |
6b008426 | 241 | file_priv->is_master = 0; |
7c1c2871 DA |
242 | mutex_unlock(&dev->struct_mutex); |
243 | return 0; | |
244 | } | |
245 | ||
0d639883 DH |
246 | /* |
247 | * DRM Minors | |
248 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
249 | * of them is represented by a drm_minor object. Depending on the capabilities | |
250 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 251 | * |
0d639883 DH |
252 | * Minors can be accessed via dev->$minor_name. This pointer is either |
253 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
254 | * valid. This means, DRM minors have the same life-time as the underlying | |
255 | * device. However, this doesn't mean that the minor is active. Minors are | |
256 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 257 | */ |
0d639883 | 258 | |
05b701f6 DH |
259 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
260 | unsigned int type) | |
261 | { | |
262 | switch (type) { | |
263 | case DRM_MINOR_LEGACY: | |
264 | return &dev->primary; | |
265 | case DRM_MINOR_RENDER: | |
266 | return &dev->render; | |
267 | case DRM_MINOR_CONTROL: | |
268 | return &dev->control; | |
269 | default: | |
270 | return NULL; | |
271 | } | |
272 | } | |
273 | ||
274 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
275 | { | |
276 | struct drm_minor *minor; | |
277 | ||
278 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
279 | if (!minor) | |
280 | return -ENOMEM; | |
281 | ||
282 | minor->type = type; | |
283 | minor->dev = dev; | |
284 | INIT_LIST_HEAD(&minor->master_list); | |
285 | ||
286 | *drm_minor_get_slot(dev, type) = minor; | |
287 | return 0; | |
288 | } | |
289 | ||
bd9dfa98 DH |
290 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
291 | { | |
292 | struct drm_minor **slot; | |
293 | ||
294 | slot = drm_minor_get_slot(dev, type); | |
295 | if (*slot) { | |
296 | kfree(*slot); | |
297 | *slot = NULL; | |
298 | } | |
299 | } | |
300 | ||
afcdbc86 | 301 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 302 | { |
2c14f28b | 303 | struct drm_minor *new_minor; |
0d639883 | 304 | unsigned long flags; |
1da177e4 | 305 | int ret; |
2c14f28b | 306 | int minor_id; |
1da177e4 LT |
307 | |
308 | DRM_DEBUG("\n"); | |
309 | ||
05b701f6 DH |
310 | new_minor = *drm_minor_get_slot(dev, type); |
311 | if (!new_minor) | |
312 | return 0; | |
313 | ||
0d639883 DH |
314 | idr_preload(GFP_KERNEL); |
315 | spin_lock_irqsave(&drm_minor_lock, flags); | |
7d86cf1a DH |
316 | minor_id = idr_alloc(&drm_minors_idr, |
317 | NULL, | |
318 | 64 * type, | |
319 | 64 * (type + 1), | |
0d639883 DH |
320 | GFP_NOWAIT); |
321 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
322 | idr_preload_end(); | |
7d86cf1a | 323 | |
2c14f28b DA |
324 | if (minor_id < 0) |
325 | return minor_id; | |
326 | ||
2c14f28b | 327 | new_minor->index = minor_id; |
2c14f28b | 328 | |
955b12de BG |
329 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
330 | if (ret) { | |
156f5a78 | 331 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
1abbc437 | 332 | goto err_id; |
955b12de | 333 | } |
2c14f28b DA |
334 | |
335 | ret = drm_sysfs_device_add(new_minor); | |
336 | if (ret) { | |
1abbc437 | 337 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
cb6458f9 | 338 | goto err_debugfs; |
1da177e4 | 339 | } |
2c14f28b | 340 | |
0d639883 DH |
341 | /* replace NULL with @minor so lookups will succeed from now on */ |
342 | spin_lock_irqsave(&drm_minor_lock, flags); | |
343 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); | |
344 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
2c14f28b DA |
345 | |
346 | DRM_DEBUG("new minor assigned %d\n", minor_id); | |
347 | return 0; | |
348 | ||
cb6458f9 | 349 | err_debugfs: |
cb6458f9 | 350 | drm_debugfs_cleanup(new_minor); |
1abbc437 | 351 | err_id: |
0d639883 | 352 | spin_lock_irqsave(&drm_minor_lock, flags); |
2c14f28b | 353 | idr_remove(&drm_minors_idr, minor_id); |
0d639883 DH |
354 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
355 | new_minor->index = 0; | |
1da177e4 LT |
356 | return ret; |
357 | } | |
b5e89ed5 | 358 | |
afcdbc86 | 359 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 360 | { |
afcdbc86 | 361 | struct drm_minor *minor; |
0d639883 | 362 | unsigned long flags; |
afcdbc86 DH |
363 | |
364 | minor = *drm_minor_get_slot(dev, type); | |
a3483353 | 365 | if (!minor || !minor->kdev) |
f73aca50 DH |
366 | return; |
367 | ||
0d639883 DH |
368 | spin_lock_irqsave(&drm_minor_lock, flags); |
369 | idr_remove(&drm_minors_idr, minor->index); | |
370 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
371 | minor->index = 0; | |
865fb47f | 372 | |
865fb47f | 373 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
374 | drm_sysfs_device_remove(minor); |
375 | } | |
376 | ||
377 | /** | |
1616c525 DH |
378 | * drm_minor_acquire - Acquire a DRM minor |
379 | * @minor_id: Minor ID of the DRM-minor | |
380 | * | |
381 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
382 | * refence-count of the underlying device is increased so you must release this | |
383 | * object with drm_minor_release(). | |
384 | * | |
385 | * As long as you hold this minor, it is guaranteed that the object and the | |
386 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
387 | * unregistered while you hold the minor. | |
f73aca50 | 388 | * |
1616c525 DH |
389 | * Returns: |
390 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
391 | * failure. | |
1da177e4 | 392 | */ |
1616c525 | 393 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 394 | { |
1616c525 | 395 | struct drm_minor *minor; |
0d639883 | 396 | unsigned long flags; |
1616c525 | 397 | |
0d639883 | 398 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 399 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
400 | if (minor) |
401 | drm_dev_ref(minor->dev); | |
402 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
403 | ||
404 | if (!minor) { | |
405 | return ERR_PTR(-ENODEV); | |
406 | } else if (drm_device_is_unplugged(minor->dev)) { | |
407 | drm_dev_unref(minor->dev); | |
1616c525 | 408 | return ERR_PTR(-ENODEV); |
0d639883 | 409 | } |
673a394b | 410 | |
1616c525 DH |
411 | return minor; |
412 | } | |
b5e89ed5 | 413 | |
1616c525 DH |
414 | /** |
415 | * drm_minor_release - Release DRM minor | |
416 | * @minor: Pointer to DRM minor object | |
417 | * | |
418 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
419 | */ | |
420 | void drm_minor_release(struct drm_minor *minor) | |
421 | { | |
422 | drm_dev_unref(minor->dev); | |
1da177e4 | 423 | } |
112b715e KH |
424 | |
425 | /** | |
426 | * Called via drm_exit() at module unload time or when pci device is | |
427 | * unplugged. | |
428 | * | |
429 | * Cleans up all DRM device, calling drm_lastclose(). | |
430 | * | |
112b715e KH |
431 | */ |
432 | void drm_put_dev(struct drm_device *dev) | |
433 | { | |
112b715e KH |
434 | DRM_DEBUG("\n"); |
435 | ||
436 | if (!dev) { | |
437 | DRM_ERROR("cleanup called no dev\n"); | |
438 | return; | |
439 | } | |
440 | ||
c3a49737 | 441 | drm_dev_unregister(dev); |
099d1c29 | 442 | drm_dev_unref(dev); |
112b715e KH |
443 | } |
444 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
445 | |
446 | void drm_unplug_dev(struct drm_device *dev) | |
447 | { | |
448 | /* for a USB device */ | |
afcdbc86 DH |
449 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
450 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
451 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
452 | |
453 | mutex_lock(&drm_global_mutex); | |
454 | ||
455 | drm_device_set_unplugged(dev); | |
456 | ||
457 | if (dev->open_count == 0) { | |
458 | drm_put_dev(dev); | |
459 | } | |
460 | mutex_unlock(&drm_global_mutex); | |
461 | } | |
462 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 463 | |
31bbe16f DH |
464 | /* |
465 | * DRM internal mount | |
466 | * We want to be able to allocate our own "struct address_space" to control | |
467 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
468 | * stand-alone address_space objects, so we need an underlying inode. As there | |
469 | * is no way to allocate an independent inode easily, we need a fake internal | |
470 | * VFS mount-point. | |
471 | * | |
472 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
473 | * frees it again. You are allowed to use iget() and iput() to get references to | |
474 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
475 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
476 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
477 | * between multiple inode-users. You could, technically, call | |
478 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
479 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
480 | */ | |
481 | ||
482 | static int drm_fs_cnt; | |
483 | static struct vfsmount *drm_fs_mnt; | |
484 | ||
485 | static const struct dentry_operations drm_fs_dops = { | |
486 | .d_dname = simple_dname, | |
487 | }; | |
488 | ||
489 | static const struct super_operations drm_fs_sops = { | |
490 | .statfs = simple_statfs, | |
491 | }; | |
492 | ||
493 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
494 | const char *dev_name, void *data) | |
495 | { | |
496 | return mount_pseudo(fs_type, | |
497 | "drm:", | |
498 | &drm_fs_sops, | |
499 | &drm_fs_dops, | |
500 | 0x010203ff); | |
501 | } | |
502 | ||
503 | static struct file_system_type drm_fs_type = { | |
504 | .name = "drm", | |
505 | .owner = THIS_MODULE, | |
506 | .mount = drm_fs_mount, | |
507 | .kill_sb = kill_anon_super, | |
508 | }; | |
509 | ||
510 | static struct inode *drm_fs_inode_new(void) | |
511 | { | |
512 | struct inode *inode; | |
513 | int r; | |
514 | ||
515 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
516 | if (r < 0) { | |
517 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
518 | return ERR_PTR(r); | |
519 | } | |
520 | ||
521 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
522 | if (IS_ERR(inode)) | |
523 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
524 | ||
525 | return inode; | |
526 | } | |
527 | ||
528 | static void drm_fs_inode_free(struct inode *inode) | |
529 | { | |
530 | if (inode) { | |
531 | iput(inode); | |
532 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
533 | } | |
534 | } | |
535 | ||
1bb72532 DH |
536 | /** |
537 | * drm_dev_alloc - Allocate new drm device | |
538 | * @driver: DRM driver to allocate device for | |
539 | * @parent: Parent device object | |
540 | * | |
541 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
542 | * Call drm_dev_register() to advertice the device to user space and register it |
543 | * with other core subsystems. | |
1bb72532 | 544 | * |
099d1c29 DH |
545 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
546 | * drm_dev_unref() to take and drop further ref-counts. | |
547 | * | |
1bb72532 DH |
548 | * RETURNS: |
549 | * Pointer to new DRM device, or NULL if out of memory. | |
550 | */ | |
551 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
552 | struct device *parent) | |
553 | { | |
554 | struct drm_device *dev; | |
555 | int ret; | |
556 | ||
557 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
558 | if (!dev) | |
559 | return NULL; | |
560 | ||
099d1c29 | 561 | kref_init(&dev->ref); |
1bb72532 DH |
562 | dev->dev = parent; |
563 | dev->driver = driver; | |
564 | ||
565 | INIT_LIST_HEAD(&dev->filelist); | |
566 | INIT_LIST_HEAD(&dev->ctxlist); | |
567 | INIT_LIST_HEAD(&dev->vmalist); | |
568 | INIT_LIST_HEAD(&dev->maplist); | |
569 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
570 | ||
571 | spin_lock_init(&dev->count_lock); | |
572 | spin_lock_init(&dev->event_lock); | |
573 | mutex_init(&dev->struct_mutex); | |
574 | mutex_init(&dev->ctxlist_mutex); | |
575 | ||
6796cb16 DH |
576 | dev->anon_inode = drm_fs_inode_new(); |
577 | if (IS_ERR(dev->anon_inode)) { | |
578 | ret = PTR_ERR(dev->anon_inode); | |
579 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 580 | goto err_free; |
6796cb16 DH |
581 | } |
582 | ||
05b701f6 DH |
583 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
584 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
585 | if (ret) | |
586 | goto err_minors; | |
587 | } | |
588 | ||
589 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { | |
590 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); | |
591 | if (ret) | |
592 | goto err_minors; | |
593 | } | |
594 | ||
595 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
596 | if (ret) | |
597 | goto err_minors; | |
598 | ||
6796cb16 | 599 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 600 | goto err_minors; |
1bb72532 DH |
601 | |
602 | ret = drm_ctxbitmap_init(dev); | |
603 | if (ret) { | |
604 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
605 | goto err_ht; | |
606 | } | |
607 | ||
608 | if (driver->driver_features & DRIVER_GEM) { | |
609 | ret = drm_gem_init(dev); | |
610 | if (ret) { | |
611 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
612 | goto err_ctxbitmap; | |
613 | } | |
614 | } | |
615 | ||
616 | return dev; | |
617 | ||
618 | err_ctxbitmap: | |
619 | drm_ctxbitmap_cleanup(dev); | |
620 | err_ht: | |
621 | drm_ht_remove(&dev->map_hash); | |
05b701f6 | 622 | err_minors: |
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); | |
6796cb16 | 626 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 DH |
627 | err_free: |
628 | kfree(dev); | |
629 | return NULL; | |
630 | } | |
631 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 632 | |
099d1c29 | 633 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 634 | { |
099d1c29 | 635 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 636 | |
0dc8fe59 DH |
637 | if (dev->driver->driver_features & DRIVER_GEM) |
638 | drm_gem_destroy(dev); | |
639 | ||
640 | drm_ctxbitmap_cleanup(dev); | |
641 | drm_ht_remove(&dev->map_hash); | |
6796cb16 | 642 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 643 | |
bd9dfa98 DH |
644 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
645 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
646 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
647 | ||
0dc8fe59 DH |
648 | kfree(dev->devname); |
649 | kfree(dev); | |
650 | } | |
099d1c29 DH |
651 | |
652 | /** | |
653 | * drm_dev_ref - Take reference of a DRM device | |
654 | * @dev: device to take reference of or NULL | |
655 | * | |
656 | * This increases the ref-count of @dev by one. You *must* already own a | |
657 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
658 | * again. | |
659 | * | |
660 | * This function never fails. However, this function does not provide *any* | |
661 | * guarantee whether the device is alive or running. It only provides a | |
662 | * reference to the object and the memory associated with it. | |
663 | */ | |
664 | void drm_dev_ref(struct drm_device *dev) | |
665 | { | |
666 | if (dev) | |
667 | kref_get(&dev->ref); | |
668 | } | |
669 | EXPORT_SYMBOL(drm_dev_ref); | |
670 | ||
671 | /** | |
672 | * drm_dev_unref - Drop reference of a DRM device | |
673 | * @dev: device to drop reference of or NULL | |
674 | * | |
675 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
676 | * ref-count drops to zero. | |
677 | */ | |
678 | void drm_dev_unref(struct drm_device *dev) | |
679 | { | |
680 | if (dev) | |
681 | kref_put(&dev->ref, drm_dev_release); | |
682 | } | |
683 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 684 | |
c22f0ace DH |
685 | /** |
686 | * drm_dev_register - Register DRM device | |
687 | * @dev: Device to register | |
688 | * | |
689 | * Register the DRM device @dev with the system, advertise device to user-space | |
690 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
691 | * previously. | |
692 | * | |
693 | * Never call this twice on any device! | |
694 | * | |
695 | * RETURNS: | |
696 | * 0 on success, negative error code on failure. | |
697 | */ | |
698 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
699 | { | |
700 | int ret; | |
701 | ||
702 | mutex_lock(&drm_global_mutex); | |
703 | ||
afcdbc86 | 704 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
705 | if (ret) |
706 | goto err_minors; | |
c22f0ace | 707 | |
afcdbc86 | 708 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
709 | if (ret) |
710 | goto err_minors; | |
c22f0ace | 711 | |
afcdbc86 | 712 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 713 | if (ret) |
05b701f6 | 714 | goto err_minors; |
c22f0ace DH |
715 | |
716 | if (dev->driver->load) { | |
717 | ret = dev->driver->load(dev, flags); | |
718 | if (ret) | |
05b701f6 | 719 | goto err_minors; |
c22f0ace DH |
720 | } |
721 | ||
722 | /* setup grouping for legacy outputs */ | |
723 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
724 | ret = drm_mode_group_init_legacy_group(dev, | |
725 | &dev->primary->mode_group); | |
726 | if (ret) | |
727 | goto err_unload; | |
728 | } | |
729 | ||
c22f0ace DH |
730 | ret = 0; |
731 | goto out_unlock; | |
732 | ||
733 | err_unload: | |
734 | if (dev->driver->unload) | |
735 | dev->driver->unload(dev); | |
05b701f6 | 736 | err_minors: |
afcdbc86 DH |
737 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
738 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
739 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
740 | out_unlock: |
741 | mutex_unlock(&drm_global_mutex); | |
742 | return ret; | |
743 | } | |
744 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
745 | |
746 | /** | |
747 | * drm_dev_unregister - Unregister DRM device | |
748 | * @dev: Device to unregister | |
749 | * | |
750 | * Unregister the DRM device from the system. This does the reverse of | |
751 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 752 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
753 | */ |
754 | void drm_dev_unregister(struct drm_device *dev) | |
755 | { | |
756 | struct drm_map_list *r_list, *list_temp; | |
757 | ||
758 | drm_lastclose(dev); | |
759 | ||
760 | if (dev->driver->unload) | |
761 | dev->driver->unload(dev); | |
762 | ||
4efafebe DV |
763 | if (dev->agp) |
764 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
765 | |
766 | drm_vblank_cleanup(dev); | |
767 | ||
768 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
769 | drm_rmmap(dev, r_list->map); | |
770 | ||
afcdbc86 DH |
771 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
772 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
773 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
774 | } |
775 | EXPORT_SYMBOL(drm_dev_unregister); |