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 | ||
1287aa90 | 100 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
4fefcb27 | 101 | { |
fffb9065 | 102 | struct va_format vaf; |
4fefcb27 | 103 | va_list args; |
1da177e4 | 104 | |
a73d4e91 LD |
105 | va_start(args, format); |
106 | vaf.fmt = format; | |
107 | vaf.va = &args; | |
108 | ||
0ed02983 | 109 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf); |
a73d4e91 LD |
110 | |
111 | va_end(args); | |
4fefcb27 | 112 | } |
113 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 114 | |
7c1c2871 DA |
115 | struct drm_master *drm_master_create(struct drm_minor *minor) |
116 | { | |
117 | struct drm_master *master; | |
118 | ||
9a298b2a | 119 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
120 | if (!master) |
121 | return NULL; | |
122 | ||
123 | kref_init(&master->refcount); | |
124 | spin_lock_init(&master->lock.spinlock); | |
125 | init_waitqueue_head(&master->lock.lock_queue); | |
126 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); | |
127 | INIT_LIST_HEAD(&master->magicfree); | |
128 | master->minor = minor; | |
129 | ||
7c1c2871 DA |
130 | return master; |
131 | } | |
132 | ||
133 | struct drm_master *drm_master_get(struct drm_master *master) | |
134 | { | |
135 | kref_get(&master->refcount); | |
136 | return master; | |
137 | } | |
85bb0c37 | 138 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
139 | |
140 | static void drm_master_destroy(struct kref *kref) | |
141 | { | |
142 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
143 | struct drm_magic_entry *pt, *next; | |
144 | struct drm_device *dev = master->minor->dev; | |
c1ff85d9 | 145 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 | 146 | |
c996fd0b | 147 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
148 | if (dev->driver->master_destroy) |
149 | dev->driver->master_destroy(dev, master); | |
150 | ||
c1ff85d9 DA |
151 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
152 | if (r_list->master == master) { | |
153 | drm_rmmap_locked(dev, r_list->map); | |
154 | r_list = NULL; | |
155 | } | |
156 | } | |
157 | ||
7c1c2871 | 158 | if (master->unique) { |
9a298b2a | 159 | kfree(master->unique); |
7c1c2871 DA |
160 | master->unique = NULL; |
161 | master->unique_len = 0; | |
162 | } | |
163 | ||
6e35023f CW |
164 | kfree(dev->devname); |
165 | dev->devname = NULL; | |
166 | ||
7c1c2871 DA |
167 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
168 | list_del(&pt->head); | |
169 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); | |
9a298b2a | 170 | kfree(pt); |
7c1c2871 DA |
171 | } |
172 | ||
173 | drm_ht_remove(&master->magiclist); | |
174 | ||
c996fd0b | 175 | mutex_unlock(&dev->struct_mutex); |
9a298b2a | 176 | kfree(master); |
7c1c2871 DA |
177 | } |
178 | ||
179 | void drm_master_put(struct drm_master **master) | |
180 | { | |
181 | kref_put(&(*master)->refcount, drm_master_destroy); | |
182 | *master = NULL; | |
183 | } | |
85bb0c37 | 184 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
185 | |
186 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
187 | struct drm_file *file_priv) | |
188 | { | |
53ef1600 | 189 | int ret = 0; |
862302ff | 190 | |
c996fd0b | 191 | mutex_lock(&dev->master_mutex); |
6b008426 | 192 | if (file_priv->is_master) |
c996fd0b | 193 | goto out_unlock; |
7c1c2871 | 194 | |
c996fd0b TH |
195 | if (file_priv->minor->master) { |
196 | ret = -EINVAL; | |
197 | goto out_unlock; | |
198 | } | |
7c1c2871 | 199 | |
c996fd0b TH |
200 | if (!file_priv->master) { |
201 | ret = -EINVAL; | |
202 | goto out_unlock; | |
203 | } | |
08bec5b4 | 204 | |
08bec5b4 DH |
205 | file_priv->minor->master = drm_master_get(file_priv->master); |
206 | file_priv->is_master = 1; | |
207 | if (dev->driver->master_set) { | |
208 | ret = dev->driver->master_set(dev, file_priv, false); | |
209 | if (unlikely(ret != 0)) { | |
210 | file_priv->is_master = 0; | |
211 | drm_master_put(&file_priv->minor->master); | |
862302ff | 212 | } |
7c1c2871 DA |
213 | } |
214 | ||
c996fd0b TH |
215 | out_unlock: |
216 | mutex_unlock(&dev->master_mutex); | |
53ef1600 | 217 | return ret; |
7c1c2871 DA |
218 | } |
219 | ||
220 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
221 | struct drm_file *file_priv) | |
222 | { | |
c996fd0b TH |
223 | int ret = -EINVAL; |
224 | ||
225 | mutex_lock(&dev->master_mutex); | |
6b008426 | 226 | if (!file_priv->is_master) |
c996fd0b | 227 | goto out_unlock; |
6b008426 | 228 | |
07f1c7a7 | 229 | if (!file_priv->minor->master) |
c996fd0b | 230 | goto out_unlock; |
07f1c7a7 | 231 | |
c996fd0b | 232 | ret = 0; |
862302ff TH |
233 | if (dev->driver->master_drop) |
234 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 235 | drm_master_put(&file_priv->minor->master); |
6b008426 | 236 | file_priv->is_master = 0; |
c996fd0b TH |
237 | |
238 | out_unlock: | |
239 | mutex_unlock(&dev->master_mutex); | |
240 | return ret; | |
7c1c2871 DA |
241 | } |
242 | ||
0d639883 DH |
243 | /* |
244 | * DRM Minors | |
245 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each | |
246 | * of them is represented by a drm_minor object. Depending on the capabilities | |
247 | * of the device-driver, different interfaces are registered. | |
1da177e4 | 248 | * |
0d639883 DH |
249 | * Minors can be accessed via dev->$minor_name. This pointer is either |
250 | * NULL or a valid drm_minor pointer and stays valid as long as the device is | |
251 | * valid. This means, DRM minors have the same life-time as the underlying | |
252 | * device. However, this doesn't mean that the minor is active. Minors are | |
253 | * registered and unregistered dynamically according to device-state. | |
1da177e4 | 254 | */ |
0d639883 | 255 | |
05b701f6 DH |
256 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
257 | unsigned int type) | |
258 | { | |
259 | switch (type) { | |
260 | case DRM_MINOR_LEGACY: | |
261 | return &dev->primary; | |
262 | case DRM_MINOR_RENDER: | |
263 | return &dev->render; | |
264 | case DRM_MINOR_CONTROL: | |
265 | return &dev->control; | |
266 | default: | |
267 | return NULL; | |
268 | } | |
269 | } | |
270 | ||
271 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) | |
272 | { | |
273 | struct drm_minor *minor; | |
274 | ||
275 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); | |
276 | if (!minor) | |
277 | return -ENOMEM; | |
278 | ||
279 | minor->type = type; | |
280 | minor->dev = dev; | |
05b701f6 DH |
281 | |
282 | *drm_minor_get_slot(dev, type) = minor; | |
283 | return 0; | |
284 | } | |
285 | ||
bd9dfa98 DH |
286 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
287 | { | |
288 | struct drm_minor **slot; | |
289 | ||
290 | slot = drm_minor_get_slot(dev, type); | |
291 | if (*slot) { | |
292 | kfree(*slot); | |
293 | *slot = NULL; | |
294 | } | |
295 | } | |
296 | ||
afcdbc86 | 297 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
1da177e4 | 298 | { |
2c14f28b | 299 | struct drm_minor *new_minor; |
0d639883 | 300 | unsigned long flags; |
1da177e4 | 301 | int ret; |
2c14f28b | 302 | int minor_id; |
1da177e4 LT |
303 | |
304 | DRM_DEBUG("\n"); | |
305 | ||
05b701f6 DH |
306 | new_minor = *drm_minor_get_slot(dev, type); |
307 | if (!new_minor) | |
308 | return 0; | |
309 | ||
0d639883 DH |
310 | idr_preload(GFP_KERNEL); |
311 | spin_lock_irqsave(&drm_minor_lock, flags); | |
7d86cf1a DH |
312 | minor_id = idr_alloc(&drm_minors_idr, |
313 | NULL, | |
314 | 64 * type, | |
315 | 64 * (type + 1), | |
0d639883 DH |
316 | GFP_NOWAIT); |
317 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
318 | idr_preload_end(); | |
7d86cf1a | 319 | |
2c14f28b DA |
320 | if (minor_id < 0) |
321 | return minor_id; | |
322 | ||
2c14f28b | 323 | new_minor->index = minor_id; |
2c14f28b | 324 | |
955b12de BG |
325 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
326 | if (ret) { | |
156f5a78 | 327 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
1abbc437 | 328 | goto err_id; |
955b12de | 329 | } |
2c14f28b DA |
330 | |
331 | ret = drm_sysfs_device_add(new_minor); | |
332 | if (ret) { | |
1abbc437 | 333 | DRM_ERROR("DRM: Error sysfs_device_add.\n"); |
cb6458f9 | 334 | goto err_debugfs; |
1da177e4 | 335 | } |
2c14f28b | 336 | |
0d639883 DH |
337 | /* replace NULL with @minor so lookups will succeed from now on */ |
338 | spin_lock_irqsave(&drm_minor_lock, flags); | |
339 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); | |
340 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
2c14f28b DA |
341 | |
342 | DRM_DEBUG("new minor assigned %d\n", minor_id); | |
343 | return 0; | |
344 | ||
cb6458f9 | 345 | err_debugfs: |
cb6458f9 | 346 | drm_debugfs_cleanup(new_minor); |
1abbc437 | 347 | err_id: |
0d639883 | 348 | spin_lock_irqsave(&drm_minor_lock, flags); |
2c14f28b | 349 | idr_remove(&drm_minors_idr, minor_id); |
0d639883 DH |
350 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
351 | new_minor->index = 0; | |
1da177e4 LT |
352 | return ret; |
353 | } | |
b5e89ed5 | 354 | |
afcdbc86 | 355 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
f73aca50 | 356 | { |
afcdbc86 | 357 | struct drm_minor *minor; |
0d639883 | 358 | unsigned long flags; |
afcdbc86 DH |
359 | |
360 | minor = *drm_minor_get_slot(dev, type); | |
a3483353 | 361 | if (!minor || !minor->kdev) |
f73aca50 DH |
362 | return; |
363 | ||
0d639883 DH |
364 | spin_lock_irqsave(&drm_minor_lock, flags); |
365 | idr_remove(&drm_minors_idr, minor->index); | |
366 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
367 | minor->index = 0; | |
865fb47f | 368 | |
865fb47f | 369 | drm_debugfs_cleanup(minor); |
f73aca50 DH |
370 | drm_sysfs_device_remove(minor); |
371 | } | |
372 | ||
373 | /** | |
1616c525 DH |
374 | * drm_minor_acquire - Acquire a DRM minor |
375 | * @minor_id: Minor ID of the DRM-minor | |
376 | * | |
377 | * Looks up the given minor-ID and returns the respective DRM-minor object. The | |
378 | * refence-count of the underlying device is increased so you must release this | |
379 | * object with drm_minor_release(). | |
380 | * | |
381 | * As long as you hold this minor, it is guaranteed that the object and the | |
382 | * minor->dev pointer will stay valid! However, the device may get unplugged and | |
383 | * unregistered while you hold the minor. | |
f73aca50 | 384 | * |
1616c525 DH |
385 | * Returns: |
386 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on | |
387 | * failure. | |
1da177e4 | 388 | */ |
1616c525 | 389 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
1da177e4 | 390 | { |
1616c525 | 391 | struct drm_minor *minor; |
0d639883 | 392 | unsigned long flags; |
1616c525 | 393 | |
0d639883 | 394 | spin_lock_irqsave(&drm_minor_lock, flags); |
1616c525 | 395 | minor = idr_find(&drm_minors_idr, minor_id); |
0d639883 DH |
396 | if (minor) |
397 | drm_dev_ref(minor->dev); | |
398 | spin_unlock_irqrestore(&drm_minor_lock, flags); | |
399 | ||
400 | if (!minor) { | |
401 | return ERR_PTR(-ENODEV); | |
402 | } else if (drm_device_is_unplugged(minor->dev)) { | |
403 | drm_dev_unref(minor->dev); | |
1616c525 | 404 | return ERR_PTR(-ENODEV); |
0d639883 | 405 | } |
673a394b | 406 | |
1616c525 DH |
407 | return minor; |
408 | } | |
b5e89ed5 | 409 | |
1616c525 DH |
410 | /** |
411 | * drm_minor_release - Release DRM minor | |
412 | * @minor: Pointer to DRM minor object | |
413 | * | |
414 | * Release a minor that was previously acquired via drm_minor_acquire(). | |
415 | */ | |
416 | void drm_minor_release(struct drm_minor *minor) | |
417 | { | |
418 | drm_dev_unref(minor->dev); | |
1da177e4 | 419 | } |
112b715e KH |
420 | |
421 | /** | |
422 | * Called via drm_exit() at module unload time or when pci device is | |
423 | * unplugged. | |
424 | * | |
425 | * Cleans up all DRM device, calling drm_lastclose(). | |
426 | * | |
112b715e KH |
427 | */ |
428 | void drm_put_dev(struct drm_device *dev) | |
429 | { | |
112b715e KH |
430 | DRM_DEBUG("\n"); |
431 | ||
432 | if (!dev) { | |
433 | DRM_ERROR("cleanup called no dev\n"); | |
434 | return; | |
435 | } | |
436 | ||
c3a49737 | 437 | drm_dev_unregister(dev); |
099d1c29 | 438 | drm_dev_unref(dev); |
112b715e KH |
439 | } |
440 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
441 | |
442 | void drm_unplug_dev(struct drm_device *dev) | |
443 | { | |
444 | /* for a USB device */ | |
afcdbc86 DH |
445 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
446 | drm_minor_unregister(dev, DRM_MINOR_RENDER); | |
447 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); | |
2c07a21d DA |
448 | |
449 | mutex_lock(&drm_global_mutex); | |
450 | ||
451 | drm_device_set_unplugged(dev); | |
452 | ||
453 | if (dev->open_count == 0) { | |
454 | drm_put_dev(dev); | |
455 | } | |
456 | mutex_unlock(&drm_global_mutex); | |
457 | } | |
458 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 | 459 | |
31bbe16f DH |
460 | /* |
461 | * DRM internal mount | |
462 | * We want to be able to allocate our own "struct address_space" to control | |
463 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow | |
464 | * stand-alone address_space objects, so we need an underlying inode. As there | |
465 | * is no way to allocate an independent inode easily, we need a fake internal | |
466 | * VFS mount-point. | |
467 | * | |
468 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() | |
469 | * frees it again. You are allowed to use iget() and iput() to get references to | |
470 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one | |
471 | * drm_fs_inode_free() call (which does not have to be the last iput()). | |
472 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it | |
473 | * between multiple inode-users. You could, technically, call | |
474 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an | |
475 | * iput(), but this way you'd end up with a new vfsmount for each inode. | |
476 | */ | |
477 | ||
478 | static int drm_fs_cnt; | |
479 | static struct vfsmount *drm_fs_mnt; | |
480 | ||
481 | static const struct dentry_operations drm_fs_dops = { | |
482 | .d_dname = simple_dname, | |
483 | }; | |
484 | ||
485 | static const struct super_operations drm_fs_sops = { | |
486 | .statfs = simple_statfs, | |
487 | }; | |
488 | ||
489 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, | |
490 | const char *dev_name, void *data) | |
491 | { | |
492 | return mount_pseudo(fs_type, | |
493 | "drm:", | |
494 | &drm_fs_sops, | |
495 | &drm_fs_dops, | |
496 | 0x010203ff); | |
497 | } | |
498 | ||
499 | static struct file_system_type drm_fs_type = { | |
500 | .name = "drm", | |
501 | .owner = THIS_MODULE, | |
502 | .mount = drm_fs_mount, | |
503 | .kill_sb = kill_anon_super, | |
504 | }; | |
505 | ||
506 | static struct inode *drm_fs_inode_new(void) | |
507 | { | |
508 | struct inode *inode; | |
509 | int r; | |
510 | ||
511 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); | |
512 | if (r < 0) { | |
513 | DRM_ERROR("Cannot mount pseudo fs: %d\n", r); | |
514 | return ERR_PTR(r); | |
515 | } | |
516 | ||
517 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); | |
518 | if (IS_ERR(inode)) | |
519 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
520 | ||
521 | return inode; | |
522 | } | |
523 | ||
524 | static void drm_fs_inode_free(struct inode *inode) | |
525 | { | |
526 | if (inode) { | |
527 | iput(inode); | |
528 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); | |
529 | } | |
530 | } | |
531 | ||
1bb72532 DH |
532 | /** |
533 | * drm_dev_alloc - Allocate new drm device | |
534 | * @driver: DRM driver to allocate device for | |
535 | * @parent: Parent device object | |
536 | * | |
537 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
538 | * Call drm_dev_register() to advertice the device to user space and register it |
539 | * with other core subsystems. | |
1bb72532 | 540 | * |
099d1c29 DH |
541 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
542 | * drm_dev_unref() to take and drop further ref-counts. | |
543 | * | |
1bb72532 DH |
544 | * RETURNS: |
545 | * Pointer to new DRM device, or NULL if out of memory. | |
546 | */ | |
547 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
548 | struct device *parent) | |
549 | { | |
550 | struct drm_device *dev; | |
551 | int ret; | |
552 | ||
553 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
554 | if (!dev) | |
555 | return NULL; | |
556 | ||
099d1c29 | 557 | kref_init(&dev->ref); |
1bb72532 DH |
558 | dev->dev = parent; |
559 | dev->driver = driver; | |
560 | ||
561 | INIT_LIST_HEAD(&dev->filelist); | |
562 | INIT_LIST_HEAD(&dev->ctxlist); | |
563 | INIT_LIST_HEAD(&dev->vmalist); | |
564 | INIT_LIST_HEAD(&dev->maplist); | |
565 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
566 | ||
567 | spin_lock_init(&dev->count_lock); | |
568 | spin_lock_init(&dev->event_lock); | |
569 | mutex_init(&dev->struct_mutex); | |
570 | mutex_init(&dev->ctxlist_mutex); | |
c996fd0b | 571 | mutex_init(&dev->master_mutex); |
1bb72532 | 572 | |
6796cb16 DH |
573 | dev->anon_inode = drm_fs_inode_new(); |
574 | if (IS_ERR(dev->anon_inode)) { | |
575 | ret = PTR_ERR(dev->anon_inode); | |
576 | DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret); | |
1bb72532 | 577 | goto err_free; |
6796cb16 DH |
578 | } |
579 | ||
05b701f6 DH |
580 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
581 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); | |
582 | if (ret) | |
583 | goto err_minors; | |
584 | } | |
585 | ||
586 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { | |
587 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); | |
588 | if (ret) | |
589 | goto err_minors; | |
590 | } | |
591 | ||
592 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); | |
593 | if (ret) | |
594 | goto err_minors; | |
595 | ||
6796cb16 | 596 | if (drm_ht_create(&dev->map_hash, 12)) |
05b701f6 | 597 | goto err_minors; |
1bb72532 DH |
598 | |
599 | ret = drm_ctxbitmap_init(dev); | |
600 | if (ret) { | |
601 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
602 | goto err_ht; | |
603 | } | |
604 | ||
605 | if (driver->driver_features & DRIVER_GEM) { | |
606 | ret = drm_gem_init(dev); | |
607 | if (ret) { | |
608 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
609 | goto err_ctxbitmap; | |
610 | } | |
611 | } | |
612 | ||
613 | return dev; | |
614 | ||
615 | err_ctxbitmap: | |
616 | drm_ctxbitmap_cleanup(dev); | |
617 | err_ht: | |
618 | drm_ht_remove(&dev->map_hash); | |
05b701f6 | 619 | err_minors: |
bd9dfa98 DH |
620 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
621 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
622 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
6796cb16 | 623 | drm_fs_inode_free(dev->anon_inode); |
1bb72532 | 624 | err_free: |
c996fd0b | 625 | mutex_destroy(&dev->master_mutex); |
1bb72532 DH |
626 | kfree(dev); |
627 | return NULL; | |
628 | } | |
629 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 630 | |
099d1c29 | 631 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 632 | { |
099d1c29 | 633 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
8f6599da | 634 | |
0dc8fe59 DH |
635 | if (dev->driver->driver_features & DRIVER_GEM) |
636 | drm_gem_destroy(dev); | |
637 | ||
638 | drm_ctxbitmap_cleanup(dev); | |
639 | drm_ht_remove(&dev->map_hash); | |
6796cb16 | 640 | drm_fs_inode_free(dev->anon_inode); |
0dc8fe59 | 641 | |
bd9dfa98 DH |
642 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
643 | drm_minor_free(dev, DRM_MINOR_RENDER); | |
644 | drm_minor_free(dev, DRM_MINOR_CONTROL); | |
645 | ||
0dc8fe59 | 646 | kfree(dev->devname); |
c996fd0b TH |
647 | |
648 | mutex_destroy(&dev->master_mutex); | |
0dc8fe59 DH |
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); |