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 | ||
34 | #include <linux/module.h> | |
35 | #include <linux/moduleparam.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
760285e7 DH |
37 | #include <drm/drmP.h> |
38 | #include <drm/drm_core.h> | |
1da177e4 | 39 | |
b5e89ed5 | 40 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
1da177e4 LT |
41 | EXPORT_SYMBOL(drm_debug); |
42 | ||
1793126f DH |
43 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
44 | EXPORT_SYMBOL(drm_rnodes); | |
45 | ||
27641c3f MK |
46 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
47 | EXPORT_SYMBOL(drm_vblank_offdelay); | |
48 | ||
49 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ | |
50 | EXPORT_SYMBOL(drm_timestamp_precision); | |
51 | ||
c61eef72 ID |
52 | /* |
53 | * Default to use monotonic timestamps for wait-for-vblank and page-flip | |
54 | * complete events. | |
55 | */ | |
56 | unsigned int drm_timestamp_monotonic = 1; | |
57 | ||
b5e89ed5 DA |
58 | MODULE_AUTHOR(CORE_AUTHOR); |
59 | MODULE_DESCRIPTION(CORE_DESC); | |
1da177e4 | 60 | MODULE_LICENSE("GPL and additional rights"); |
1da177e4 | 61 | MODULE_PARM_DESC(debug, "Enable debug output"); |
1793126f | 62 | MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API"); |
27641c3f MK |
63 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]"); |
64 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); | |
c61eef72 | 65 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
1da177e4 | 66 | |
c0758146 | 67 | module_param_named(debug, drm_debug, int, 0600); |
1793126f | 68 | module_param_named(rnodes, drm_rnodes, int, 0600); |
27641c3f MK |
69 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
70 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); | |
c61eef72 | 71 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
1da177e4 | 72 | |
2c14f28b DA |
73 | struct idr drm_minors_idr; |
74 | ||
0650fd58 | 75 | struct class *drm_class; |
955b12de | 76 | struct dentry *drm_debugfs_root; |
5ad3d883 JP |
77 | |
78 | int drm_err(const char *func, const char *format, ...) | |
79 | { | |
80 | struct va_format vaf; | |
81 | va_list args; | |
82 | int r; | |
83 | ||
84 | va_start(args, format); | |
85 | ||
86 | vaf.fmt = format; | |
87 | vaf.va = &args; | |
88 | ||
89 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf); | |
90 | ||
91 | va_end(args); | |
92 | ||
93 | return r; | |
94 | } | |
95 | EXPORT_SYMBOL(drm_err); | |
96 | ||
4fefcb27 | 97 | void drm_ut_debug_printk(unsigned int request_level, |
98 | const char *prefix, | |
99 | const char *function_name, | |
100 | const char *format, ...) | |
101 | { | |
fffb9065 | 102 | struct va_format vaf; |
4fefcb27 | 103 | va_list args; |
1da177e4 | 104 | |
4fefcb27 | 105 | if (drm_debug & request_level) { |
4fefcb27 | 106 | va_start(args, format); |
fffb9065 DV |
107 | vaf.fmt = format; |
108 | vaf.va = &args; | |
109 | ||
110 | if (function_name) | |
111 | printk(KERN_DEBUG "[%s:%s], %pV", prefix, | |
112 | function_name, &vaf); | |
113 | else | |
114 | printk(KERN_DEBUG "%pV", &vaf); | |
4fefcb27 | 115 | va_end(args); |
116 | } | |
117 | } | |
118 | EXPORT_SYMBOL(drm_ut_debug_printk); | |
5ad3d883 | 119 | |
2c14f28b DA |
120 | static int drm_minor_get_id(struct drm_device *dev, int type) |
121 | { | |
2c14f28b DA |
122 | int ret; |
123 | int base = 0, limit = 63; | |
124 | ||
f453ba04 | 125 | if (type == DRM_MINOR_CONTROL) { |
24f40032 KH |
126 | base += 64; |
127 | limit = base + 63; | |
128 | } else if (type == DRM_MINOR_RENDER) { | |
129 | base += 128; | |
130 | limit = base + 63; | |
131 | } | |
f453ba04 | 132 | |
2c14f28b | 133 | mutex_lock(&dev->struct_mutex); |
2e928815 | 134 | ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL); |
2c14f28b | 135 | mutex_unlock(&dev->struct_mutex); |
2e928815 TH |
136 | |
137 | return ret == -ENOSPC ? -EINVAL : ret; | |
2c14f28b DA |
138 | } |
139 | ||
7c1c2871 DA |
140 | struct drm_master *drm_master_create(struct drm_minor *minor) |
141 | { | |
142 | struct drm_master *master; | |
143 | ||
9a298b2a | 144 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
7c1c2871 DA |
145 | if (!master) |
146 | return NULL; | |
147 | ||
148 | kref_init(&master->refcount); | |
149 | spin_lock_init(&master->lock.spinlock); | |
150 | init_waitqueue_head(&master->lock.lock_queue); | |
151 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); | |
152 | INIT_LIST_HEAD(&master->magicfree); | |
153 | master->minor = minor; | |
154 | ||
155 | list_add_tail(&master->head, &minor->master_list); | |
156 | ||
157 | return master; | |
158 | } | |
159 | ||
160 | struct drm_master *drm_master_get(struct drm_master *master) | |
161 | { | |
162 | kref_get(&master->refcount); | |
163 | return master; | |
164 | } | |
85bb0c37 | 165 | EXPORT_SYMBOL(drm_master_get); |
7c1c2871 DA |
166 | |
167 | static void drm_master_destroy(struct kref *kref) | |
168 | { | |
169 | struct drm_master *master = container_of(kref, struct drm_master, refcount); | |
170 | struct drm_magic_entry *pt, *next; | |
171 | struct drm_device *dev = master->minor->dev; | |
c1ff85d9 | 172 | struct drm_map_list *r_list, *list_temp; |
7c1c2871 DA |
173 | |
174 | list_del(&master->head); | |
175 | ||
176 | if (dev->driver->master_destroy) | |
177 | dev->driver->master_destroy(dev, master); | |
178 | ||
c1ff85d9 DA |
179 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
180 | if (r_list->master == master) { | |
181 | drm_rmmap_locked(dev, r_list->map); | |
182 | r_list = NULL; | |
183 | } | |
184 | } | |
185 | ||
7c1c2871 | 186 | if (master->unique) { |
9a298b2a | 187 | kfree(master->unique); |
7c1c2871 DA |
188 | master->unique = NULL; |
189 | master->unique_len = 0; | |
190 | } | |
191 | ||
6e35023f CW |
192 | kfree(dev->devname); |
193 | dev->devname = NULL; | |
194 | ||
7c1c2871 DA |
195 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
196 | list_del(&pt->head); | |
197 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); | |
9a298b2a | 198 | kfree(pt); |
7c1c2871 DA |
199 | } |
200 | ||
201 | drm_ht_remove(&master->magiclist); | |
202 | ||
9a298b2a | 203 | kfree(master); |
7c1c2871 DA |
204 | } |
205 | ||
206 | void drm_master_put(struct drm_master **master) | |
207 | { | |
208 | kref_put(&(*master)->refcount, drm_master_destroy); | |
209 | *master = NULL; | |
210 | } | |
85bb0c37 | 211 | EXPORT_SYMBOL(drm_master_put); |
7c1c2871 DA |
212 | |
213 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, | |
214 | struct drm_file *file_priv) | |
215 | { | |
53ef1600 | 216 | int ret = 0; |
862302ff | 217 | |
6b008426 JB |
218 | if (file_priv->is_master) |
219 | return 0; | |
220 | ||
7c1c2871 DA |
221 | if (file_priv->minor->master && file_priv->minor->master != file_priv->master) |
222 | return -EINVAL; | |
223 | ||
224 | if (!file_priv->master) | |
225 | return -EINVAL; | |
226 | ||
08bec5b4 DH |
227 | if (file_priv->minor->master) |
228 | return -EINVAL; | |
229 | ||
230 | mutex_lock(&dev->struct_mutex); | |
231 | file_priv->minor->master = drm_master_get(file_priv->master); | |
232 | file_priv->is_master = 1; | |
233 | if (dev->driver->master_set) { | |
234 | ret = dev->driver->master_set(dev, file_priv, false); | |
235 | if (unlikely(ret != 0)) { | |
236 | file_priv->is_master = 0; | |
237 | drm_master_put(&file_priv->minor->master); | |
862302ff | 238 | } |
7c1c2871 | 239 | } |
08bec5b4 | 240 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 | 241 | |
53ef1600 | 242 | return ret; |
7c1c2871 DA |
243 | } |
244 | ||
245 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, | |
246 | struct drm_file *file_priv) | |
247 | { | |
6b008426 | 248 | if (!file_priv->is_master) |
7c1c2871 | 249 | return -EINVAL; |
6b008426 | 250 | |
07f1c7a7 DA |
251 | if (!file_priv->minor->master) |
252 | return -EINVAL; | |
253 | ||
7c1c2871 | 254 | mutex_lock(&dev->struct_mutex); |
862302ff TH |
255 | if (dev->driver->master_drop) |
256 | dev->driver->master_drop(dev, file_priv, false); | |
7c1c2871 | 257 | drm_master_put(&file_priv->minor->master); |
6b008426 | 258 | file_priv->is_master = 0; |
7c1c2871 DA |
259 | mutex_unlock(&dev->struct_mutex); |
260 | return 0; | |
261 | } | |
262 | ||
1da177e4 | 263 | /** |
a99ee459 DH |
264 | * drm_get_minor - Allocate and register new DRM minor |
265 | * @dev: DRM device | |
266 | * @minor: Pointer to where new minor is stored | |
267 | * @type: Type of minor | |
1da177e4 | 268 | * |
a99ee459 DH |
269 | * Allocate a new minor of the given type and register it. A pointer to the new |
270 | * minor is returned in @minor. | |
271 | * Caller must hold the global DRM mutex. | |
1da177e4 | 272 | * |
a99ee459 DH |
273 | * RETURNS: |
274 | * 0 on success, negative error code on failure. | |
1da177e4 | 275 | */ |
a99ee459 DH |
276 | static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, |
277 | int type) | |
1da177e4 | 278 | { |
2c14f28b | 279 | struct drm_minor *new_minor; |
1da177e4 | 280 | int ret; |
2c14f28b | 281 | int minor_id; |
1da177e4 LT |
282 | |
283 | DRM_DEBUG("\n"); | |
284 | ||
2c14f28b DA |
285 | minor_id = drm_minor_get_id(dev, type); |
286 | if (minor_id < 0) | |
287 | return minor_id; | |
288 | ||
289 | new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL); | |
290 | if (!new_minor) { | |
291 | ret = -ENOMEM; | |
292 | goto err_idr; | |
293 | } | |
294 | ||
295 | new_minor->type = type; | |
296 | new_minor->device = MKDEV(DRM_MAJOR, minor_id); | |
297 | new_minor->dev = dev; | |
298 | new_minor->index = minor_id; | |
7c1c2871 | 299 | INIT_LIST_HEAD(&new_minor->master_list); |
2c14f28b DA |
300 | |
301 | idr_replace(&drm_minors_idr, new_minor, minor_id); | |
302 | ||
955b12de BG |
303 | #if defined(CONFIG_DEBUG_FS) |
304 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); | |
305 | if (ret) { | |
156f5a78 | 306 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); |
cb6458f9 | 307 | goto err_mem; |
955b12de BG |
308 | } |
309 | #endif | |
2c14f28b DA |
310 | |
311 | ret = drm_sysfs_device_add(new_minor); | |
312 | if (ret) { | |
313 | printk(KERN_ERR | |
314 | "DRM: Error sysfs_device_add.\n"); | |
cb6458f9 | 315 | goto err_debugfs; |
1da177e4 | 316 | } |
2c14f28b DA |
317 | *minor = new_minor; |
318 | ||
319 | DRM_DEBUG("new minor assigned %d\n", minor_id); | |
320 | return 0; | |
321 | ||
322 | ||
cb6458f9 DV |
323 | err_debugfs: |
324 | #if defined(CONFIG_DEBUG_FS) | |
325 | drm_debugfs_cleanup(new_minor); | |
2c14f28b | 326 | err_mem: |
cb6458f9 | 327 | #endif |
2c14f28b DA |
328 | kfree(new_minor); |
329 | err_idr: | |
330 | idr_remove(&drm_minors_idr, minor_id); | |
331 | *minor = NULL; | |
1da177e4 LT |
332 | return ret; |
333 | } | |
b5e89ed5 | 334 | |
1da177e4 | 335 | /** |
f73aca50 DH |
336 | * drm_unplug_minor - Unplug DRM minor |
337 | * @minor: Minor to unplug | |
1da177e4 | 338 | * |
f73aca50 DH |
339 | * Unplugs the given DRM minor but keeps the object. So after this returns, |
340 | * minor->dev is still valid so existing open-files can still access it to get | |
341 | * device information from their drm_file ojects. | |
342 | * If the minor is already unplugged or if @minor is NULL, nothing is done. | |
343 | * The global DRM mutex must be held by the caller. | |
344 | */ | |
345 | static void drm_unplug_minor(struct drm_minor *minor) | |
346 | { | |
a3483353 | 347 | if (!minor || !minor->kdev) |
f73aca50 DH |
348 | return; |
349 | ||
865fb47f DH |
350 | #if defined(CONFIG_DEBUG_FS) |
351 | drm_debugfs_cleanup(minor); | |
352 | #endif | |
353 | ||
f73aca50 | 354 | drm_sysfs_device_remove(minor); |
f67e946b | 355 | idr_remove(&drm_minors_idr, minor->index); |
f73aca50 DH |
356 | } |
357 | ||
358 | /** | |
359 | * drm_put_minor - Destroy DRM minor | |
4ac387f5 | 360 | * @minor: Minor to destroy |
f73aca50 | 361 | * |
4ac387f5 DH |
362 | * This calls drm_unplug_minor() on the given minor and then frees it. Nothing |
363 | * is done if @minor is NULL. It is fine to call this on already unplugged | |
364 | * minors. | |
f73aca50 | 365 | * The global DRM mutex must be held by the caller. |
1da177e4 | 366 | */ |
4ac387f5 | 367 | static void drm_put_minor(struct drm_minor *minor) |
1da177e4 | 368 | { |
4ac387f5 DH |
369 | if (!minor) |
370 | return; | |
673a394b | 371 | |
2c14f28b | 372 | DRM_DEBUG("release secondary minor %d\n", minor->index); |
b5e89ed5 | 373 | |
f73aca50 | 374 | drm_unplug_minor(minor); |
2c14f28b | 375 | kfree(minor); |
1da177e4 | 376 | } |
112b715e KH |
377 | |
378 | /** | |
379 | * Called via drm_exit() at module unload time or when pci device is | |
380 | * unplugged. | |
381 | * | |
382 | * Cleans up all DRM device, calling drm_lastclose(). | |
383 | * | |
112b715e KH |
384 | */ |
385 | void drm_put_dev(struct drm_device *dev) | |
386 | { | |
112b715e KH |
387 | DRM_DEBUG("\n"); |
388 | ||
389 | if (!dev) { | |
390 | DRM_ERROR("cleanup called no dev\n"); | |
391 | return; | |
392 | } | |
393 | ||
c3a49737 | 394 | drm_dev_unregister(dev); |
099d1c29 | 395 | drm_dev_unref(dev); |
112b715e KH |
396 | } |
397 | EXPORT_SYMBOL(drm_put_dev); | |
2c07a21d DA |
398 | |
399 | void drm_unplug_dev(struct drm_device *dev) | |
400 | { | |
401 | /* for a USB device */ | |
402 | if (drm_core_check_feature(dev, DRIVER_MODESET)) | |
403 | drm_unplug_minor(dev->control); | |
1793126f DH |
404 | if (dev->render) |
405 | drm_unplug_minor(dev->render); | |
2c07a21d DA |
406 | drm_unplug_minor(dev->primary); |
407 | ||
408 | mutex_lock(&drm_global_mutex); | |
409 | ||
410 | drm_device_set_unplugged(dev); | |
411 | ||
412 | if (dev->open_count == 0) { | |
413 | drm_put_dev(dev); | |
414 | } | |
415 | mutex_unlock(&drm_global_mutex); | |
416 | } | |
417 | EXPORT_SYMBOL(drm_unplug_dev); | |
1bb72532 DH |
418 | |
419 | /** | |
420 | * drm_dev_alloc - Allocate new drm device | |
421 | * @driver: DRM driver to allocate device for | |
422 | * @parent: Parent device object | |
423 | * | |
424 | * Allocate and initialize a new DRM device. No device registration is done. | |
c22f0ace DH |
425 | * Call drm_dev_register() to advertice the device to user space and register it |
426 | * with other core subsystems. | |
1bb72532 | 427 | * |
099d1c29 DH |
428 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
429 | * drm_dev_unref() to take and drop further ref-counts. | |
430 | * | |
1bb72532 DH |
431 | * RETURNS: |
432 | * Pointer to new DRM device, or NULL if out of memory. | |
433 | */ | |
434 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, | |
435 | struct device *parent) | |
436 | { | |
437 | struct drm_device *dev; | |
438 | int ret; | |
439 | ||
440 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
441 | if (!dev) | |
442 | return NULL; | |
443 | ||
099d1c29 | 444 | kref_init(&dev->ref); |
1bb72532 DH |
445 | dev->dev = parent; |
446 | dev->driver = driver; | |
447 | ||
448 | INIT_LIST_HEAD(&dev->filelist); | |
449 | INIT_LIST_HEAD(&dev->ctxlist); | |
450 | INIT_LIST_HEAD(&dev->vmalist); | |
451 | INIT_LIST_HEAD(&dev->maplist); | |
452 | INIT_LIST_HEAD(&dev->vblank_event_list); | |
453 | ||
454 | spin_lock_init(&dev->count_lock); | |
455 | spin_lock_init(&dev->event_lock); | |
456 | mutex_init(&dev->struct_mutex); | |
457 | mutex_init(&dev->ctxlist_mutex); | |
458 | ||
1bb72532 DH |
459 | if (drm_ht_create(&dev->map_hash, 12)) |
460 | goto err_free; | |
461 | ||
462 | ret = drm_ctxbitmap_init(dev); | |
463 | if (ret) { | |
464 | DRM_ERROR("Cannot allocate memory for context bitmap.\n"); | |
465 | goto err_ht; | |
466 | } | |
467 | ||
468 | if (driver->driver_features & DRIVER_GEM) { | |
469 | ret = drm_gem_init(dev); | |
470 | if (ret) { | |
471 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n"); | |
472 | goto err_ctxbitmap; | |
473 | } | |
474 | } | |
475 | ||
476 | return dev; | |
477 | ||
478 | err_ctxbitmap: | |
479 | drm_ctxbitmap_cleanup(dev); | |
480 | err_ht: | |
481 | drm_ht_remove(&dev->map_hash); | |
482 | err_free: | |
483 | kfree(dev); | |
484 | return NULL; | |
485 | } | |
486 | EXPORT_SYMBOL(drm_dev_alloc); | |
c22f0ace | 487 | |
099d1c29 | 488 | static void drm_dev_release(struct kref *ref) |
0dc8fe59 | 489 | { |
099d1c29 DH |
490 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
491 | ||
8f6599da DH |
492 | drm_put_minor(dev->control); |
493 | drm_put_minor(dev->render); | |
494 | drm_put_minor(dev->primary); | |
495 | ||
0dc8fe59 DH |
496 | if (dev->driver->driver_features & DRIVER_GEM) |
497 | drm_gem_destroy(dev); | |
498 | ||
499 | drm_ctxbitmap_cleanup(dev); | |
500 | drm_ht_remove(&dev->map_hash); | |
501 | ||
502 | kfree(dev->devname); | |
503 | kfree(dev); | |
504 | } | |
099d1c29 DH |
505 | |
506 | /** | |
507 | * drm_dev_ref - Take reference of a DRM device | |
508 | * @dev: device to take reference of or NULL | |
509 | * | |
510 | * This increases the ref-count of @dev by one. You *must* already own a | |
511 | * reference when calling this. Use drm_dev_unref() to drop this reference | |
512 | * again. | |
513 | * | |
514 | * This function never fails. However, this function does not provide *any* | |
515 | * guarantee whether the device is alive or running. It only provides a | |
516 | * reference to the object and the memory associated with it. | |
517 | */ | |
518 | void drm_dev_ref(struct drm_device *dev) | |
519 | { | |
520 | if (dev) | |
521 | kref_get(&dev->ref); | |
522 | } | |
523 | EXPORT_SYMBOL(drm_dev_ref); | |
524 | ||
525 | /** | |
526 | * drm_dev_unref - Drop reference of a DRM device | |
527 | * @dev: device to drop reference of or NULL | |
528 | * | |
529 | * This decreases the ref-count of @dev by one. The device is destroyed if the | |
530 | * ref-count drops to zero. | |
531 | */ | |
532 | void drm_dev_unref(struct drm_device *dev) | |
533 | { | |
534 | if (dev) | |
535 | kref_put(&dev->ref, drm_dev_release); | |
536 | } | |
537 | EXPORT_SYMBOL(drm_dev_unref); | |
0dc8fe59 | 538 | |
c22f0ace DH |
539 | /** |
540 | * drm_dev_register - Register DRM device | |
541 | * @dev: Device to register | |
542 | * | |
543 | * Register the DRM device @dev with the system, advertise device to user-space | |
544 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() | |
545 | * previously. | |
546 | * | |
547 | * Never call this twice on any device! | |
548 | * | |
549 | * RETURNS: | |
550 | * 0 on success, negative error code on failure. | |
551 | */ | |
552 | int drm_dev_register(struct drm_device *dev, unsigned long flags) | |
553 | { | |
554 | int ret; | |
555 | ||
556 | mutex_lock(&drm_global_mutex); | |
557 | ||
c22f0ace DH |
558 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
559 | ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); | |
560 | if (ret) | |
2c695fa0 | 561 | goto out_unlock; |
c22f0ace DH |
562 | } |
563 | ||
564 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { | |
565 | ret = drm_get_minor(dev, &dev->render, DRM_MINOR_RENDER); | |
566 | if (ret) | |
567 | goto err_control_node; | |
568 | } | |
569 | ||
570 | ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY); | |
571 | if (ret) | |
572 | goto err_render_node; | |
573 | ||
574 | if (dev->driver->load) { | |
575 | ret = dev->driver->load(dev, flags); | |
576 | if (ret) | |
577 | goto err_primary_node; | |
578 | } | |
579 | ||
580 | /* setup grouping for legacy outputs */ | |
581 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { | |
582 | ret = drm_mode_group_init_legacy_group(dev, | |
583 | &dev->primary->mode_group); | |
584 | if (ret) | |
585 | goto err_unload; | |
586 | } | |
587 | ||
c22f0ace DH |
588 | ret = 0; |
589 | goto out_unlock; | |
590 | ||
591 | err_unload: | |
592 | if (dev->driver->unload) | |
593 | dev->driver->unload(dev); | |
594 | err_primary_node: | |
0f58411d | 595 | drm_unplug_minor(dev->primary); |
c22f0ace | 596 | err_render_node: |
0f58411d | 597 | drm_unplug_minor(dev->render); |
c22f0ace | 598 | err_control_node: |
0f58411d | 599 | drm_unplug_minor(dev->control); |
c22f0ace DH |
600 | out_unlock: |
601 | mutex_unlock(&drm_global_mutex); | |
602 | return ret; | |
603 | } | |
604 | EXPORT_SYMBOL(drm_dev_register); | |
c3a49737 DH |
605 | |
606 | /** | |
607 | * drm_dev_unregister - Unregister DRM device | |
608 | * @dev: Device to unregister | |
609 | * | |
610 | * Unregister the DRM device from the system. This does the reverse of | |
611 | * drm_dev_register() but does not deallocate the device. The caller must call | |
099d1c29 | 612 | * drm_dev_unref() to drop their final reference. |
c3a49737 DH |
613 | */ |
614 | void drm_dev_unregister(struct drm_device *dev) | |
615 | { | |
616 | struct drm_map_list *r_list, *list_temp; | |
617 | ||
618 | drm_lastclose(dev); | |
619 | ||
620 | if (dev->driver->unload) | |
621 | dev->driver->unload(dev); | |
622 | ||
4efafebe DV |
623 | if (dev->agp) |
624 | drm_pci_agp_destroy(dev); | |
c3a49737 DH |
625 | |
626 | drm_vblank_cleanup(dev); | |
627 | ||
628 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) | |
629 | drm_rmmap(dev, r_list->map); | |
630 | ||
8f6599da DH |
631 | drm_unplug_minor(dev->control); |
632 | drm_unplug_minor(dev->render); | |
633 | drm_unplug_minor(dev->primary); | |
c3a49737 DH |
634 | } |
635 | EXPORT_SYMBOL(drm_dev_unregister); |