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