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 | ||
a73d4e91 | 100 | void drm_ut_debug_printk(const char *prefix, |
4fefcb27 | 101 | const char *function_name, |
102 | const char *format, ...) | |
103 | { | |
fffb9065 | 104 | struct va_format vaf; |
4fefcb27 | 105 | va_list args; |
1da177e4 | 106 | |
a73d4e91 LD |
107 | va_start(args, format); |
108 | vaf.fmt = format; | |
109 | vaf.va = &args; | |
110 | ||
1288c19f | 111 | printk(KERN_DEBUG "[%s:%s], %pV", prefix, function_name, &vaf); |
a73d4e91 LD |
112 | |
113 | va_end(args); | |
4fefcb27 | 114 | } |
115 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 116 | |
7c1c2871 DA |
117 | struct drm_master *drm_master_create(struct drm_minor *minor) |
118 | { | |
119 | struct drm_master *master; | |
120 | ||
9a298b2a | 121 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
122 | if (!master) |
123 | return NULL; | |
124 | ||
125 | kref_init(&master->refcount); | |
126 | spin_lock_init(&master->lock.spinlock); | |
127 | init_waitqueue_head(&master->lock.lock_queue); | |
128 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); | |
129 | INIT_LIST_HEAD(&master->magicfree); | |
130 | master->minor = minor; | |
131 | ||
132 | list_add_tail(&master->head, &minor->master_list); | |
133 | ||
134 | return master; | |
135 | } | |
136 | ||
137 | struct drm_master *drm_master_get(struct drm_master *master) | |
138 | { | |
139 | kref_get(&master->refcount); | |
140 | return master; | |
141 | } | |
85bb0c37 | 142 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
143 | |
144 | static void drm_master_destroy(struct kref *kref) | |
145 | { | |
146 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
147 | struct drm_magic_entry *pt, *next; | |
148 | struct drm_device *dev = master->minor->dev; | |
c1ff85d9 | 149 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 DA |
150 | |
151 | list_del(&master->head); | |
152 | ||
153 | if (dev->driver->master_destroy) | |
154 | dev->driver->master_destroy(dev, master); | |
155 | ||
c1ff85d9 DA |
156 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
157 | if (r_list->master == master) { | |
158 | drm_rmmap_locked(dev, r_list->map); | |
159 | r_list = NULL; | |
160 | } | |
161 | } | |
162 | ||
7c1c2871 | 163 | if (master->unique) { |
9a298b2a | 164 | kfree(master->unique); |
7c1c2871 DA |
165 | master->unique = NULL; |
166 | master->unique_len = 0; | |
167 | } | |
168 | ||
6e35023f CW |
169 | kfree(dev->devname); |
170 | dev->devname = NULL; | |
171 | ||
7c1c2871 DA |
172 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
173 | list_del(&pt->head); | |
174 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); | |
9a298b2a | 175 | kfree(pt); |
7c1c2871 DA |
176 | } |
177 | ||
178 | drm_ht_remove(&master->magiclist); | |
179 | ||
9a298b2a | 180 | kfree(master); |
7c1c2871 DA |
181 | } |
182 | ||
183 | void drm_master_put(struct drm_master **master) | |
184 | { | |
185 | kref_put(&(*master)->refcount, drm_master_destroy); | |
186 | *master = NULL; | |
187 | } | |
85bb0c37 | 188 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
189 | |
190 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
191 | struct drm_file *file_priv) | |
192 | { | |
53ef1600 | 193 | int ret = 0; |
862302ff | 194 | |
6b008426 JB |
195 | if (file_priv->is_master) |
196 | return 0; | |
197 | ||
7c1c2871 DA |
198 | if (file_priv->minor->master && file_priv->minor->master != file_priv->master) |
199 | return -EINVAL; | |
200 | ||
201 | if (!file_priv->master) | |
202 | return -EINVAL; | |
203 | ||
08bec5b4 DH |
204 | if (file_priv->minor->master) |
205 | return -EINVAL; | |
206 | ||
207 | mutex_lock(&dev->struct_mutex); | |
208 | file_priv->minor->master = drm_master_get(file_priv->master); | |
209 | file_priv->is_master = 1; | |
210 | if (dev->driver->master_set) { | |
211 | ret = dev->driver->master_set(dev, file_priv, false); | |
212 | if (unlikely(ret != 0)) { | |
213 | file_priv->is_master = 0; | |
214 | drm_master_put(&file_priv->minor->master); | |
862302ff | 215 | } |
7c1c2871 | 216 | } |
08bec5b4 | 217 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 | 218 | |
53ef1600 | 219 | return ret; |
7c1c2871 DA |
220 | } |
221 | ||
222 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
223 | struct drm_file *file_priv) | |
224 | { | |
6b008426 | 225 | if (!file_priv->is_master) |
7c1c2871 | 226 | return -EINVAL; |
6b008426 | 227 | |
07f1c7a7 DA |
228 | if (!file_priv->minor->master) |
229 | return -EINVAL; | |
230 | ||
7c1c2871 | 231 | mutex_lock(&dev->struct_mutex); |
862302ff TH |
232 | if (dev->driver->master_drop) |
233 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 234 | drm_master_put(&file_priv->minor->master); |
6b008426 | 235 | file_priv->is_master = 0; |
7c1c2871 DA |
236 | mutex_unlock(&dev->struct_mutex); |
237 | return 0; | |
238 | } | |
239 | ||
0d639883 DH |
240 | /* |
241 | * DRM Minors | |
242 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
243 | * of them is represented by a drm_minor object. Depending on the capabilities | |
244 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 245 | * |
0d639883 DH |
246 | * Minors can be accessed via dev->$minor_name. This pointer is either |
247 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
248 | * valid. This means, DRM minors have the same life-time as the underlying | |
249 | * device. However, this doesn't mean that the minor is active. Minors are | |
250 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 251 | */ |
0d639883 | 252 | |
05b701f6 DH |
253 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
254 | unsigned int type) | |
255 | { | |
256 | switch (type) { | |
257 | case DRM_MINOR_LEGACY: | |
258 | return &dev->primary; | |
259 | case DRM_MINOR_RENDER: | |
260 | return &dev->render; | |
261 | case DRM_MINOR_CONTROL: | |
262 | return &dev->control; | |
263 | default: | |
264 | return NULL; | |
265 | } | |
266 | } | |
267 | ||
268 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
269 | { | |
270 | struct drm_minor *minor; | |
271 | ||
272 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
273 | if (!minor) | |
274 | return -ENOMEM; | |
275 | ||
276 | minor->type = type; | |
277 | minor->dev = dev; | |
278 | INIT_LIST_HEAD(&minor->master_list); | |
279 | ||
280 | *drm_minor_get_slot(dev, type) = minor; | |
281 | return 0; | |
282 | } | |
283 | ||
bd9dfa98 DH |
284 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
285 | { | |
286 | struct drm_minor **slot; | |
287 | ||
288 | slot = drm_minor_get_slot(dev, type); | |
289 | if (*slot) { | |
290 | kfree(*slot); | |
291 | *slot = NULL; | |
292 | } | |
293 | } | |
294 | ||
afcdbc86 | 295 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 296 | { |
2c14f28b | 297 | struct drm_minor *new_minor; |
0d639883 | 298 | unsigned long flags; |
1da177e4 | 299 | int ret; |
2c14f28b | 300 | int minor_id; |
1da177e4 LT |
301 | |
302 | DRM_DEBUG("\n"); | |
303 | ||
05b701f6 DH |
304 | new_minor = *drm_minor_get_slot(dev, type); |
305 | if (!new_minor) | |
306 | return 0; | |
307 | ||
0d639883 DH |
308 | idr_preload(GFP_KERNEL); |
309 | spin_lock_irqsave(&drm_minor_lock, flags); | |
7d86cf1a DH |
310 | minor_id = idr_alloc(&drm_minors_idr, |
311 | NULL, | |
312 | 64 * type, | |
313 | 64 * (type + 1), | |
0d639883 DH |
314 | GFP_NOWAIT); |
315 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
316 | idr_preload_end(); | |
7d86cf1a | 317 | |
2c14f28b DA |
318 | if (minor_id < 0) |
319 | return minor_id; | |
320 | ||
2c14f28b | 321 | new_minor->index = minor_id; |
2c14f28b | 322 | |
955b12de BG |
323 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
324 | if (ret) { | |
156f5a78 | 325 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
1abbc437 | 326 | goto err_id; |
955b12de | 327 | } |
2c14f28b DA |
328 | |
329 | ret = drm_sysfs_device_add(new_minor); | |
330 | if (ret) { | |
1abbc437 | 331 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
cb6458f9 | 332 | goto err_debugfs; |
1da177e4 | 333 | } |
2c14f28b | 334 | |
0d639883 DH |
335 | /* replace NULL with @minor so lookups will succeed from now on */ |
336 | spin_lock_irqsave(&drm_minor_lock, flags); | |
337 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); | |
338 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
2c14f28b DA |
339 | |
340 | DRM_DEBUG("new minor assigned %d\n", minor_id); | |
341 | return 0; | |
342 | ||
cb6458f9 | 343 | err_debugfs: |
cb6458f9 | 344 | drm_debugfs_cleanup(new_minor); |
1abbc437 | 345 | err_id: |
0d639883 | 346 | spin_lock_irqsave(&drm_minor_lock, flags); |
2c14f28b | 347 | idr_remove(&drm_minors_idr, minor_id); |
0d639883 DH |
348 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
349 | new_minor->index = 0; | |
1da177e4 LT |
350 | return ret; |
351 | } | |
b5e89ed5 | 352 | |
afcdbc86 | 353 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 354 | { |
afcdbc86 | 355 | struct drm_minor *minor; |
0d639883 | 356 | unsigned long flags; |
afcdbc86 DH |
357 | |
358 | minor = *drm_minor_get_slot(dev, type); | |
a3483353 | 359 | if (!minor || !minor->kdev) |
f73aca50 DH |
360 | return; |
361 | ||
0d639883 DH |
362 | spin_lock_irqsave(&drm_minor_lock, flags); |
363 | idr_remove(&drm_minors_idr, minor->index); | |
364 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
365 | minor->index = 0; | |
865fb47f | 366 | |
865fb47f | 367 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
368 | drm_sysfs_device_remove(minor); |
369 | } | |
370 | ||
371 | /** | |
1616c525 DH |
372 | * drm_minor_acquire - Acquire a DRM minor |
373 | * @minor_id: Minor ID of the DRM-minor | |
374 | * | |
375 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
376 | * refence-count of the underlying device is increased so you must release this | |
377 | * object with drm_minor_release(). | |
378 | * | |
379 | * As long as you hold this minor, it is guaranteed that the object and the | |
380 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
381 | * unregistered while you hold the minor. | |
f73aca50 | 382 | * |
1616c525 DH |
383 | * Returns: |
384 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
385 | * failure. | |
1da177e4 | 386 | */ |
1616c525 | 387 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 388 | { |
1616c525 | 389 | struct drm_minor *minor; |
0d639883 | 390 | unsigned long flags; |
1616c525 | 391 | |
0d639883 | 392 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 393 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
394 | if (minor) |
395 | drm_dev_ref(minor->dev); | |
396 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
397 | ||
398 | if (!minor) { | |
399 | return ERR_PTR(-ENODEV); | |
400 | } else if (drm_device_is_unplugged(minor->dev)) { | |
401 | drm_dev_unref(minor->dev); | |
1616c525 | 402 | return ERR_PTR(-ENODEV); |
0d639883 | 403 | } |
673a394b | 404 | |
1616c525 DH |
405 | return minor; |
406 | } | |
b5e89ed5 | 407 | |
1616c525 DH |
408 | /** |
409 | * drm_minor_release - Release DRM minor | |
410 | * @minor: Pointer to DRM minor object | |
411 | * | |
412 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
413 | */ | |
414 | void drm_minor_release(struct drm_minor *minor) | |
415 | { | |
416 | drm_dev_unref(minor->dev); | |
1da177e4 | 417 | } |
112b715e KH |
418 | |
419 | /** | |
420 | * Called via drm_exit() at module unload time or when pci device is | |
421 | * unplugged. | |
422 | * | |
423 | * Cleans up all DRM device, calling drm_lastclose(). | |
424 | * | |
112b715e KH |
425 | */ |
426 | void drm_put_dev(struct drm_device *dev) | |
427 | { | |
112b715e KH |
428 | DRM_DEBUG("\n"); |
429 | ||
430 | if (!dev) { | |
431 | DRM_ERROR("cleanup called no dev\n"); | |
432 | return; | |
433 | } | |
434 | ||
c3a49737 | 435 | drm_dev_unregister(dev); |
099d1c29 | 436 | drm_dev_unref(dev); |
112b715e KH |
437 | } |
438 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
439 | |
440 | void drm_unplug_dev(struct drm_device *dev) | |
441 | { | |
442 | /* for a USB device */ | |
afcdbc86 DH |
443 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
444 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
445 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
446 | |
447 | mutex_lock(&drm_global_mutex); | |
448 | ||
449 | drm_device_set_unplugged(dev); | |
450 | ||
451 | if (dev->open_count == 0) { | |
452 | drm_put_dev(dev); | |
453 | } | |
454 | mutex_unlock(&drm_global_mutex); | |
455 | } | |
456 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 457 | |
31bbe16f DH |
458 | /* |
459 | * DRM internal mount | |
460 | * We want to be able to allocate our own "struct address_space" to control | |
461 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
462 | * stand-alone address_space objects, so we need an underlying inode. As there | |
463 | * is no way to allocate an independent inode easily, we need a fake internal | |
464 | * VFS mount-point. | |
465 | * | |
466 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
467 | * frees it again. You are allowed to use iget() and iput() to get references to | |
468 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
469 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
470 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
471 | * between multiple inode-users. You could, technically, call | |
472 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
473 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
474 | */ | |
475 | ||
476 | static int drm_fs_cnt; | |
477 | static struct vfsmount *drm_fs_mnt; | |
478 | ||
479 | static const struct dentry_operations drm_fs_dops = { | |
480 | .d_dname = simple_dname, | |
481 | }; | |
482 | ||
483 | static const struct super_operations drm_fs_sops = { | |
484 | .statfs = simple_statfs, | |
485 | }; | |
486 | ||
487 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
488 | const char *dev_name, void *data) | |
489 | { | |
490 | return mount_pseudo(fs_type, | |
491 | "drm:", | |
492 | &drm_fs_sops, | |
493 | &drm_fs_dops, | |
494 | 0x010203ff); | |
495 | } | |
496 | ||
497 | static struct file_system_type drm_fs_type = { | |
498 | .name = "drm", | |
499 | .owner = THIS_MODULE, | |
500 | .mount = drm_fs_mount, | |
501 | .kill_sb = kill_anon_super, | |
502 | }; | |
503 | ||
504 | static struct inode *drm_fs_inode_new(void) | |
505 | { | |
506 | struct inode *inode; | |
507 | int r; | |
508 | ||
509 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
510 | if (r < 0) { | |
511 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
512 | return ERR_PTR(r); | |
513 | } | |
514 | ||
515 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
516 | if (IS_ERR(inode)) | |
517 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
518 | ||
519 | return inode; | |
520 | } | |
521 | ||
522 | static void drm_fs_inode_free(struct inode *inode) | |
523 | { | |
524 | if (inode) { | |
525 | iput(inode); | |
526 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
527 | } | |
528 | } | |
529 | ||
1bb72532 DH |
530 | /** |
531 | * drm_dev_alloc - Allocate new drm device | |
532 | * @driver: DRM driver to allocate device for | |
533 | * @parent: Parent device object | |
534 | * | |
535 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
536 | * Call drm_dev_register() to advertice the device to user space and register it |
537 | * with other core subsystems. | |
1bb72532 | 538 | * |
099d1c29 DH |
539 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
540 | * drm_dev_unref() to take and drop further ref-counts. | |
541 | * | |
1bb72532 DH |
542 | * RETURNS: |
543 | * Pointer to new DRM device, or NULL if out of memory. | |
544 | */ | |
545 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
546 | struct device *parent) | |
547 | { | |
548 | struct drm_device *dev; | |
549 | int ret; | |
550 | ||
551 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
552 | if (!dev) | |
553 | return NULL; | |
554 | ||
099d1c29 | 555 | kref_init(&dev->ref); |
1bb72532 DH |
556 | dev->dev = parent; |
557 | dev->driver = driver; | |
558 | ||
559 | INIT_LIST_HEAD(&dev->filelist); | |
560 | INIT_LIST_HEAD(&dev->ctxlist); | |
561 | INIT_LIST_HEAD(&dev->vmalist); | |
562 | INIT_LIST_HEAD(&dev->maplist); | |
563 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
564 | ||
565 | spin_lock_init(&dev->count_lock); | |
566 | spin_lock_init(&dev->event_lock); | |
567 | mutex_init(&dev->struct_mutex); | |
568 | mutex_init(&dev->ctxlist_mutex); | |
569 | ||
6796cb16 DH |
570 | dev->anon_inode = drm_fs_inode_new(); |
571 | if (IS_ERR(dev->anon_inode)) { | |
572 | ret = PTR_ERR(dev->anon_inode); | |
573 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 574 | goto err_free; |
6796cb16 DH |
575 | } |
576 | ||
05b701f6 DH |
577 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
578 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
579 | if (ret) | |
580 | goto err_minors; | |
581 | } | |
582 | ||
583 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { | |
584 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); | |
585 | if (ret) | |
586 | goto err_minors; | |
587 | } | |
588 | ||
589 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
590 | if (ret) | |
591 | goto err_minors; | |
592 | ||
6796cb16 | 593 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 594 | goto err_minors; |
1bb72532 DH |
595 | |
596 | ret = drm_ctxbitmap_init(dev); | |
597 | if (ret) { | |
598 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
599 | goto err_ht; | |
600 | } | |
601 | ||
602 | if (driver->driver_features & DRIVER_GEM) { | |
603 | ret = drm_gem_init(dev); | |
604 | if (ret) { | |
605 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
606 | goto err_ctxbitmap; | |
607 | } | |
608 | } | |
609 | ||
610 | return dev; | |
611 | ||
612 | err_ctxbitmap: | |
613 | drm_ctxbitmap_cleanup(dev); | |
614 | err_ht: | |
615 | drm_ht_remove(&dev->map_hash); | |
05b701f6 | 616 | err_minors: |
bd9dfa98 DH |
617 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
618 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
619 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 620 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 DH |
621 | err_free: |
622 | kfree(dev); | |
623 | return NULL; | |
624 | } | |
625 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 626 | |
099d1c29 | 627 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 628 | { |
099d1c29 | 629 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 630 | |
0dc8fe59 DH |
631 | if (dev->driver->driver_features & DRIVER_GEM) |
632 | drm_gem_destroy(dev); | |
633 | ||
634 | drm_ctxbitmap_cleanup(dev); | |
635 | drm_ht_remove(&dev->map_hash); | |
6796cb16 | 636 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 637 | |
bd9dfa98 DH |
638 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
639 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
640 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
641 | ||
0dc8fe59 DH |
642 | kfree(dev->devname); |
643 | kfree(dev); | |
644 | } | |
099d1c29 DH |
645 | |
646 | /** | |
647 | * drm_dev_ref - Take reference of a DRM device | |
648 | * @dev: device to take reference of or NULL | |
649 | * | |
650 | * This increases the ref-count of @dev by one. You *must* already own a | |
651 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
652 | * again. | |
653 | * | |
654 | * This function never fails. However, this function does not provide *any* | |
655 | * guarantee whether the device is alive or running. It only provides a | |
656 | * reference to the object and the memory associated with it. | |
657 | */ | |
658 | void drm_dev_ref(struct drm_device *dev) | |
659 | { | |
660 | if (dev) | |
661 | kref_get(&dev->ref); | |
662 | } | |
663 | EXPORT_SYMBOL(drm_dev_ref); | |
664 | ||
665 | /** | |
666 | * drm_dev_unref - Drop reference of a DRM device | |
667 | * @dev: device to drop reference of or NULL | |
668 | * | |
669 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
670 | * ref-count drops to zero. | |
671 | */ | |
672 | void drm_dev_unref(struct drm_device *dev) | |
673 | { | |
674 | if (dev) | |
675 | kref_put(&dev->ref, drm_dev_release); | |
676 | } | |
677 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 678 | |
c22f0ace DH |
679 | /** |
680 | * drm_dev_register - Register DRM device | |
681 | * @dev: Device to register | |
682 | * | |
683 | * Register the DRM device @dev with the system, advertise device to user-space | |
684 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
685 | * previously. | |
686 | * | |
687 | * Never call this twice on any device! | |
688 | * | |
689 | * RETURNS: | |
690 | * 0 on success, negative error code on failure. | |
691 | */ | |
692 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
693 | { | |
694 | int ret; | |
695 | ||
696 | mutex_lock(&drm_global_mutex); | |
697 | ||
afcdbc86 | 698 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
05b701f6 DH |
699 | if (ret) |
700 | goto err_minors; | |
c22f0ace | 701 | |
afcdbc86 | 702 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
05b701f6 DH |
703 | if (ret) |
704 | goto err_minors; | |
c22f0ace | 705 | |
afcdbc86 | 706 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
c22f0ace | 707 | if (ret) |
05b701f6 | 708 | goto err_minors; |
c22f0ace DH |
709 | |
710 | if (dev->driver->load) { | |
711 | ret = dev->driver->load(dev, flags); | |
712 | if (ret) | |
05b701f6 | 713 | goto err_minors; |
c22f0ace DH |
714 | } |
715 | ||
716 | /* setup grouping for legacy outputs */ | |
717 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
718 | ret = drm_mode_group_init_legacy_group(dev, | |
719 | &dev->primary->mode_group); | |
720 | if (ret) | |
721 | goto err_unload; | |
722 | } | |
723 | ||
c22f0ace DH |
724 | ret = 0; |
725 | goto out_unlock; | |
726 | ||
727 | err_unload: | |
728 | if (dev->driver->unload) | |
729 | dev->driver->unload(dev); | |
05b701f6 | 730 | err_minors: |
afcdbc86 DH |
731 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
732 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
733 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c22f0ace DH |
734 | out_unlock: |
735 | mutex_unlock(&drm_global_mutex); | |
736 | return ret; | |
737 | } | |
738 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
739 | |
740 | /** | |
741 | * drm_dev_unregister - Unregister DRM device | |
742 | * @dev: Device to unregister | |
743 | * | |
744 | * Unregister the DRM device from the system. This does the reverse of | |
745 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 746 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
747 | */ |
748 | void drm_dev_unregister(struct drm_device *dev) | |
749 | { | |
750 | struct drm_map_list *r_list, *list_temp; | |
751 | ||
752 | drm_lastclose(dev); | |
753 | ||
754 | if (dev->driver->unload) | |
755 | dev->driver->unload(dev); | |
756 | ||
4efafebe DV |
757 | if (dev->agp) |
758 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
759 | |
760 | drm_vblank_cleanup(dev); | |
761 | ||
762 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
763 | drm_rmmap(dev, r_list->map); | |
764 | ||
afcdbc86 DH |
765 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
766 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
767 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
c3a49737 DH |
768 | } |
769 | EXPORT_SYMBOL(drm_dev_unregister); |