Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_fops.c |
1da177e4 | 3 | * File operations for DRM |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Daryll Strauss <daryll@valinux.com> | |
7 | * \author Gareth Hughes <gareth@valinux.com> | |
8 | */ | |
9 | ||
10 | /* | |
11 | * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com | |
12 | * | |
13 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
14 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
15 | * All Rights Reserved. | |
16 | * | |
17 | * Permission is hereby granted, free of charge, to any person obtaining a | |
18 | * copy of this software and associated documentation files (the "Software"), | |
19 | * to deal in the Software without restriction, including without limitation | |
20 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
21 | * and/or sell copies of the Software, and to permit persons to whom the | |
22 | * Software is furnished to do so, subject to the following conditions: | |
23 | * | |
24 | * The above copyright notice and this permission notice (including the next | |
25 | * paragraph) shall be included in all copies or substantial portions of the | |
26 | * Software. | |
27 | * | |
28 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
29 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
30 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
31 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
32 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
33 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
34 | * OTHER DEALINGS IN THE SOFTWARE. | |
35 | */ | |
36 | ||
760285e7 | 37 | #include <drm/drmP.h> |
1da177e4 | 38 | #include <linux/poll.h> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
e0cd3608 | 40 | #include <linux/module.h> |
1da177e4 | 41 | |
58374713 AB |
42 | /* from BKL pushdown: note that nothing else serializes idr_find() */ |
43 | DEFINE_MUTEX(drm_global_mutex); | |
e3461a2b | 44 | EXPORT_SYMBOL(drm_global_mutex); |
58374713 | 45 | |
b5e89ed5 | 46 | static int drm_open_helper(struct inode *inode, struct file *filp, |
84b1fd10 | 47 | struct drm_device * dev); |
c94f7029 | 48 | |
84b1fd10 | 49 | static int drm_setup(struct drm_device * dev) |
1da177e4 | 50 | { |
1da177e4 LT |
51 | int ret; |
52 | ||
7d14bb6b DV |
53 | if (dev->driver->firstopen && |
54 | !drm_core_check_feature(dev, DRIVER_MODESET)) { | |
22eae947 | 55 | ret = dev->driver->firstopen(dev); |
b5e89ed5 | 56 | if (ret != 0) |
1da177e4 LT |
57 | return ret; |
58 | } | |
59 | ||
f336ab76 DV |
60 | ret = drm_legacy_dma_setup(dev); |
61 | if (ret < 0) | |
62 | return ret; | |
1da177e4 | 63 | |
1da177e4 | 64 | |
b5e89ed5 | 65 | DRM_DEBUG("\n"); |
1da177e4 LT |
66 | return 0; |
67 | } | |
68 | ||
69 | /** | |
70 | * Open file. | |
b5e89ed5 | 71 | * |
1da177e4 LT |
72 | * \param inode device inode |
73 | * \param filp file pointer. | |
74 | * \return zero on success or a negative number on failure. | |
75 | * | |
76 | * Searches the DRM device with the same minor number, calls open_helper(), and | |
77 | * increments the device open count. If the open count was previous at zero, | |
78 | * i.e., it's the first that the device is open, then calls setup(). | |
79 | */ | |
b5e89ed5 | 80 | int drm_open(struct inode *inode, struct file *filp) |
1da177e4 | 81 | { |
84b1fd10 | 82 | struct drm_device *dev = NULL; |
2c14f28b DA |
83 | int minor_id = iminor(inode); |
84 | struct drm_minor *minor; | |
1da177e4 | 85 | int retcode = 0; |
fdb40a08 IH |
86 | int need_setup = 0; |
87 | struct address_space *old_mapping; | |
a8ec3a66 | 88 | struct address_space *old_imapping; |
1da177e4 | 89 | |
2c14f28b DA |
90 | minor = idr_find(&drm_minors_idr, minor_id); |
91 | if (!minor) | |
1da177e4 | 92 | return -ENODEV; |
b5e89ed5 | 93 | |
2c14f28b | 94 | if (!(dev = minor->dev)) |
1da177e4 | 95 | return -ENODEV; |
b5e89ed5 | 96 | |
2c07a21d DA |
97 | if (drm_device_is_unplugged(dev)) |
98 | return -ENODEV; | |
99 | ||
fdb40a08 IH |
100 | if (!dev->open_count++) |
101 | need_setup = 1; | |
102 | mutex_lock(&dev->struct_mutex); | |
a8ec3a66 | 103 | old_imapping = inode->i_mapping; |
fdb40a08 IH |
104 | old_mapping = dev->dev_mapping; |
105 | if (old_mapping == NULL) | |
106 | dev->dev_mapping = &inode->i_data; | |
107 | /* ihold ensures nobody can remove inode with our i_data */ | |
108 | ihold(container_of(dev->dev_mapping, struct inode, i_data)); | |
109 | inode->i_mapping = dev->dev_mapping; | |
110 | filp->f_mapping = dev->dev_mapping; | |
111 | mutex_unlock(&dev->struct_mutex); | |
112 | ||
b5e89ed5 | 113 | retcode = drm_open_helper(inode, filp, dev); |
fdb40a08 IH |
114 | if (retcode) |
115 | goto err_undo; | |
fdb40a08 IH |
116 | if (need_setup) { |
117 | retcode = drm_setup(dev); | |
118 | if (retcode) | |
119 | goto err_undo; | |
f453ba04 | 120 | } |
fdb40a08 | 121 | return 0; |
a2c0a97b | 122 | |
fdb40a08 IH |
123 | err_undo: |
124 | mutex_lock(&dev->struct_mutex); | |
a8ec3a66 IH |
125 | filp->f_mapping = old_imapping; |
126 | inode->i_mapping = old_imapping; | |
fdb40a08 IH |
127 | iput(container_of(dev->dev_mapping, struct inode, i_data)); |
128 | dev->dev_mapping = old_mapping; | |
129 | mutex_unlock(&dev->struct_mutex); | |
130 | dev->open_count--; | |
1da177e4 LT |
131 | return retcode; |
132 | } | |
133 | EXPORT_SYMBOL(drm_open); | |
134 | ||
d985c108 DA |
135 | /** |
136 | * File \c open operation. | |
137 | * | |
138 | * \param inode device inode. | |
139 | * \param filp file pointer. | |
140 | * | |
141 | * Puts the dev->fops corresponding to the device minor number into | |
142 | * \p filp, call the \c open method, and restore the file operations. | |
143 | */ | |
144 | int drm_stub_open(struct inode *inode, struct file *filp) | |
145 | { | |
84b1fd10 | 146 | struct drm_device *dev = NULL; |
2c14f28b DA |
147 | struct drm_minor *minor; |
148 | int minor_id = iminor(inode); | |
d985c108 | 149 | int err = -ENODEV; |
e84f9e57 | 150 | const struct file_operations *new_fops; |
d985c108 DA |
151 | |
152 | DRM_DEBUG("\n"); | |
153 | ||
58374713 | 154 | mutex_lock(&drm_global_mutex); |
2c14f28b DA |
155 | minor = idr_find(&drm_minors_idr, minor_id); |
156 | if (!minor) | |
70ffa16e | 157 | goto out; |
d985c108 | 158 | |
2c14f28b | 159 | if (!(dev = minor->dev)) |
70ffa16e | 160 | goto out; |
d985c108 | 161 | |
2c07a21d DA |
162 | if (drm_device_is_unplugged(dev)) |
163 | goto out; | |
164 | ||
e84f9e57 AV |
165 | new_fops = fops_get(dev->driver->fops); |
166 | if (!new_fops) | |
f41ced8f | 167 | goto out; |
d985c108 | 168 | |
e84f9e57 AV |
169 | replace_fops(filp, new_fops); |
170 | if (filp->f_op->open) | |
171 | err = filp->f_op->open(inode, filp); | |
70ffa16e | 172 | out: |
58374713 | 173 | mutex_unlock(&drm_global_mutex); |
d985c108 DA |
174 | return err; |
175 | } | |
176 | ||
177 | /** | |
178 | * Check whether DRI will run on this CPU. | |
179 | * | |
180 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. | |
181 | */ | |
182 | static int drm_cpu_valid(void) | |
183 | { | |
184 | #if defined(__i386__) | |
185 | if (boot_cpu_data.x86 == 3) | |
186 | return 0; /* No cmpxchg on a 386 */ | |
187 | #endif | |
188 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
189 | return 0; /* No cmpxchg before v9 sparc. */ | |
190 | #endif | |
191 | return 1; | |
192 | } | |
193 | ||
194 | /** | |
195 | * Called whenever a process opens /dev/drm. | |
196 | * | |
197 | * \param inode device inode. | |
198 | * \param filp file pointer. | |
199 | * \param dev device. | |
200 | * \return zero on success or a negative number on failure. | |
201 | * | |
202 | * Creates and initializes a drm_file structure for the file private data in \p | |
203 | * filp and add it into the double linked list in \p dev. | |
204 | */ | |
205 | static int drm_open_helper(struct inode *inode, struct file *filp, | |
84b1fd10 | 206 | struct drm_device * dev) |
d985c108 | 207 | { |
2c14f28b | 208 | int minor_id = iminor(inode); |
84b1fd10 | 209 | struct drm_file *priv; |
d985c108 DA |
210 | int ret; |
211 | ||
212 | if (filp->f_flags & O_EXCL) | |
213 | return -EBUSY; /* No exclusive opens */ | |
214 | if (!drm_cpu_valid()) | |
215 | return -EINVAL; | |
13bb9cc8 | 216 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF) |
5bcf719b | 217 | return -EINVAL; |
d985c108 | 218 | |
2c14f28b | 219 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); |
d985c108 | 220 | |
6ebc22e6 | 221 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
d985c108 DA |
222 | if (!priv) |
223 | return -ENOMEM; | |
224 | ||
d985c108 | 225 | filp->private_data = priv; |
6c340eac | 226 | priv->filp = filp; |
2df68b43 | 227 | priv->uid = current_euid(); |
5fce5e0b | 228 | priv->pid = get_pid(task_pid(current)); |
2c14f28b | 229 | priv->minor = idr_find(&drm_minors_idr, minor_id); |
df9b6a9c SWK |
230 | if (!priv->minor) { |
231 | ret = -ENODEV; | |
232 | goto out_put_pid; | |
233 | } | |
234 | ||
d985c108 | 235 | /* for compatibility root is always authenticated */ |
1020dc69 CW |
236 | priv->always_authenticated = capable(CAP_SYS_ADMIN); |
237 | priv->authenticated = priv->always_authenticated; | |
d985c108 DA |
238 | priv->lock_count = 0; |
239 | ||
bd1b331f | 240 | INIT_LIST_HEAD(&priv->lhead); |
f453ba04 | 241 | INIT_LIST_HEAD(&priv->fbs); |
4b096ac1 | 242 | mutex_init(&priv->fbs_lock); |
c9a9c5e0 KH |
243 | INIT_LIST_HEAD(&priv->event_list); |
244 | init_waitqueue_head(&priv->event_wait); | |
245 | priv->event_space = 4096; /* set aside 4k for event buffer */ | |
bd1b331f | 246 | |
673a394b EA |
247 | if (dev->driver->driver_features & DRIVER_GEM) |
248 | drm_gem_open(dev, priv); | |
249 | ||
3248877e DA |
250 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
251 | drm_prime_init_file_private(&priv->prime); | |
252 | ||
d985c108 DA |
253 | if (dev->driver->open) { |
254 | ret = dev->driver->open(dev, priv); | |
255 | if (ret < 0) | |
df9b6a9c | 256 | goto out_prime_destroy; |
d985c108 DA |
257 | } |
258 | ||
1793126f DH |
259 | /* if there is no current master make this fd it, but do not create |
260 | * any master object for render clients */ | |
30e2fb18 | 261 | mutex_lock(&dev->struct_mutex); |
1793126f | 262 | if (!priv->minor->master && !drm_is_render_client(priv)) { |
7c1c2871 DA |
263 | /* create a new master */ |
264 | priv->minor->master = drm_master_create(priv->minor); | |
265 | if (!priv->minor->master) { | |
dba5ed0c | 266 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 | 267 | ret = -ENOMEM; |
df9b6a9c | 268 | goto out_close; |
7c1c2871 DA |
269 | } |
270 | ||
271 | priv->is_master = 1; | |
272 | /* take another reference for the copy in the local file priv */ | |
273 | priv->master = drm_master_get(priv->minor->master); | |
274 | ||
275 | priv->authenticated = 1; | |
276 | ||
277 | mutex_unlock(&dev->struct_mutex); | |
278 | if (dev->driver->master_create) { | |
279 | ret = dev->driver->master_create(dev, priv->master); | |
280 | if (ret) { | |
281 | mutex_lock(&dev->struct_mutex); | |
282 | /* drop both references if this fails */ | |
283 | drm_master_put(&priv->minor->master); | |
284 | drm_master_put(&priv->master); | |
285 | mutex_unlock(&dev->struct_mutex); | |
df9b6a9c | 286 | goto out_close; |
7c1c2871 DA |
287 | } |
288 | } | |
862302ff TH |
289 | mutex_lock(&dev->struct_mutex); |
290 | if (dev->driver->master_set) { | |
291 | ret = dev->driver->master_set(dev, priv, true); | |
292 | if (ret) { | |
293 | /* drop both references if this fails */ | |
294 | drm_master_put(&priv->minor->master); | |
295 | drm_master_put(&priv->master); | |
296 | mutex_unlock(&dev->struct_mutex); | |
df9b6a9c | 297 | goto out_close; |
862302ff TH |
298 | } |
299 | } | |
1793126f | 300 | } else if (!drm_is_render_client(priv)) { |
7c1c2871 DA |
301 | /* get a reference to the master */ |
302 | priv->master = drm_master_get(priv->minor->master); | |
7c1c2871 | 303 | } |
1793126f | 304 | mutex_unlock(&dev->struct_mutex); |
bd1b331f | 305 | |
7c1c2871 | 306 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 307 | list_add(&priv->lhead, &dev->filelist); |
30e2fb18 | 308 | mutex_unlock(&dev->struct_mutex); |
d985c108 DA |
309 | |
310 | #ifdef __alpha__ | |
311 | /* | |
312 | * Default the hose | |
313 | */ | |
314 | if (!dev->hose) { | |
315 | struct pci_dev *pci_dev; | |
316 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); | |
317 | if (pci_dev) { | |
318 | dev->hose = pci_dev->sysdata; | |
319 | pci_dev_put(pci_dev); | |
320 | } | |
321 | if (!dev->hose) { | |
322 | struct pci_bus *b = pci_bus_b(pci_root_buses.next); | |
323 | if (b) | |
324 | dev->hose = b->sysdata; | |
325 | } | |
326 | } | |
327 | #endif | |
328 | ||
329 | return 0; | |
df9b6a9c SWK |
330 | |
331 | out_close: | |
332 | if (dev->driver->postclose) | |
333 | dev->driver->postclose(dev, priv); | |
334 | out_prime_destroy: | |
335 | if (drm_core_check_feature(dev, DRIVER_PRIME)) | |
336 | drm_prime_destroy_file_private(&priv->prime); | |
337 | if (dev->driver->driver_features & DRIVER_GEM) | |
338 | drm_gem_release(dev, priv); | |
339 | out_put_pid: | |
340 | put_pid(priv->pid); | |
9a298b2a | 341 | kfree(priv); |
d985c108 DA |
342 | filp->private_data = NULL; |
343 | return ret; | |
344 | } | |
345 | ||
7c1c2871 DA |
346 | static void drm_master_release(struct drm_device *dev, struct file *filp) |
347 | { | |
348 | struct drm_file *file_priv = filp->private_data; | |
349 | ||
7c1c2871 DA |
350 | if (drm_i_have_hw_lock(dev, file_priv)) { |
351 | DRM_DEBUG("File %p released, freeing lock for context %d\n", | |
352 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
353 | drm_lock_free(&file_priv->master->lock, | |
354 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
355 | } | |
7c1c2871 DA |
356 | } |
357 | ||
c9a9c5e0 KH |
358 | static void drm_events_release(struct drm_file *file_priv) |
359 | { | |
360 | struct drm_device *dev = file_priv->minor->dev; | |
361 | struct drm_pending_event *e, *et; | |
362 | struct drm_pending_vblank_event *v, *vt; | |
363 | unsigned long flags; | |
364 | ||
365 | spin_lock_irqsave(&dev->event_lock, flags); | |
366 | ||
367 | /* Remove pending flips */ | |
368 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) | |
369 | if (v->base.file_priv == file_priv) { | |
370 | list_del(&v->base.link); | |
371 | drm_vblank_put(dev, v->pipe); | |
372 | v->base.destroy(&v->base); | |
373 | } | |
374 | ||
375 | /* Remove unconsumed events */ | |
1dda6805 YC |
376 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) { |
377 | list_del(&e->link); | |
c9a9c5e0 | 378 | e->destroy(e); |
1dda6805 | 379 | } |
c9a9c5e0 KH |
380 | |
381 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
382 | } | |
383 | ||
1c8887dd DH |
384 | /** |
385 | * drm_legacy_dev_reinit | |
386 | * | |
387 | * Reinitializes a legacy/ums drm device in it's lastclose function. | |
388 | */ | |
389 | static void drm_legacy_dev_reinit(struct drm_device *dev) | |
390 | { | |
1c8887dd DH |
391 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
392 | return; | |
393 | ||
1c8887dd DH |
394 | dev->sigdata.lock = NULL; |
395 | ||
396 | dev->context_flag = 0; | |
397 | dev->last_context = 0; | |
398 | dev->if_version = 0; | |
399 | } | |
400 | ||
401 | /** | |
402 | * Take down the DRM device. | |
403 | * | |
404 | * \param dev DRM device structure. | |
405 | * | |
406 | * Frees every resource in \p dev. | |
407 | * | |
408 | * \sa drm_device | |
409 | */ | |
410 | int drm_lastclose(struct drm_device * dev) | |
411 | { | |
412 | struct drm_vma_entry *vma, *vma_temp; | |
413 | ||
414 | DRM_DEBUG("\n"); | |
415 | ||
416 | if (dev->driver->lastclose) | |
417 | dev->driver->lastclose(dev); | |
418 | DRM_DEBUG("driver lastclose completed\n"); | |
419 | ||
420 | if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) | |
421 | drm_irq_uninstall(dev); | |
422 | ||
423 | mutex_lock(&dev->struct_mutex); | |
424 | ||
425 | drm_agp_clear(dev); | |
426 | ||
427 | drm_legacy_sg_cleanup(dev); | |
428 | ||
429 | /* Clear vma list (only built for debugging) */ | |
430 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { | |
431 | list_del(&vma->head); | |
432 | kfree(vma); | |
433 | } | |
434 | ||
435 | drm_legacy_dma_takedown(dev); | |
436 | ||
437 | dev->dev_mapping = NULL; | |
438 | mutex_unlock(&dev->struct_mutex); | |
439 | ||
440 | drm_legacy_dev_reinit(dev); | |
441 | ||
442 | DRM_DEBUG("lastclose completed\n"); | |
443 | return 0; | |
444 | } | |
445 | ||
1da177e4 LT |
446 | /** |
447 | * Release file. | |
448 | * | |
449 | * \param inode device inode | |
6c340eac | 450 | * \param file_priv DRM file private. |
1da177e4 LT |
451 | * \return zero on success or a negative number on failure. |
452 | * | |
453 | * If the hardware lock is held then free it, and take it again for the kernel | |
454 | * context since it's necessary to reclaim buffers. Unlink the file private | |
455 | * data from its list and free it. Decreases the open count and if it reaches | |
22eae947 | 456 | * zero calls drm_lastclose(). |
1da177e4 | 457 | */ |
b5e89ed5 | 458 | int drm_release(struct inode *inode, struct file *filp) |
1da177e4 | 459 | { |
6c340eac | 460 | struct drm_file *file_priv = filp->private_data; |
2c14f28b | 461 | struct drm_device *dev = file_priv->minor->dev; |
1da177e4 LT |
462 | int retcode = 0; |
463 | ||
58374713 | 464 | mutex_lock(&drm_global_mutex); |
1da177e4 | 465 | |
b5e89ed5 | 466 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
1da177e4 | 467 | |
22eae947 | 468 | if (dev->driver->preclose) |
6c340eac | 469 | dev->driver->preclose(dev, file_priv); |
1da177e4 LT |
470 | |
471 | /* ======================================================== | |
472 | * Begin inline drm_release | |
473 | */ | |
474 | ||
b5e89ed5 | 475 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
ba25f9dc | 476 | task_pid_nr(current), |
2c14f28b | 477 | (long)old_encode_dev(file_priv->minor->device), |
b5e89ed5 DA |
478 | dev->open_count); |
479 | ||
598781d7 TH |
480 | /* Release any auth tokens that might point to this file_priv, |
481 | (do that under the drm_global_mutex) */ | |
482 | if (file_priv->magic) | |
483 | (void) drm_remove_magic(file_priv->master, file_priv->magic); | |
484 | ||
7c1c2871 DA |
485 | /* if the master has gone away we can't do anything with the lock */ |
486 | if (file_priv->minor->master) | |
487 | drm_master_release(dev, filp); | |
1da177e4 | 488 | |
67cb4b4d DV |
489 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
490 | drm_core_reclaim_buffers(dev, file_priv); | |
491 | ||
c9a9c5e0 KH |
492 | drm_events_release(file_priv); |
493 | ||
ea39f835 KH |
494 | if (dev->driver->driver_features & DRIVER_MODESET) |
495 | drm_fb_release(file_priv); | |
496 | ||
4e47e02d P |
497 | if (dev->driver->driver_features & DRIVER_GEM) |
498 | drm_gem_release(dev, file_priv); | |
499 | ||
c21eb21c DA |
500 | mutex_lock(&dev->ctxlist_mutex); |
501 | if (!list_empty(&dev->ctxlist)) { | |
502 | struct drm_ctx_list *pos, *n; | |
503 | ||
504 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { | |
505 | if (pos->tag == file_priv && | |
506 | pos->handle != DRM_KERNEL_CONTEXT) { | |
507 | if (dev->driver->context_dtor) | |
508 | dev->driver->context_dtor(dev, | |
509 | pos->handle); | |
510 | ||
511 | drm_ctxbitmap_free(dev, pos->handle); | |
512 | ||
513 | list_del(&pos->head); | |
514 | kfree(pos); | |
c21eb21c DA |
515 | } |
516 | } | |
517 | } | |
518 | mutex_unlock(&dev->ctxlist_mutex); | |
1da177e4 | 519 | |
30e2fb18 | 520 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
521 | |
522 | if (file_priv->is_master) { | |
fda714c2 | 523 | struct drm_master *master = file_priv->master; |
84b1fd10 | 524 | struct drm_file *temp; |
7c1c2871 DA |
525 | list_for_each_entry(temp, &dev->filelist, lhead) { |
526 | if ((temp->master == file_priv->master) && | |
527 | (temp != file_priv)) | |
1020dc69 | 528 | temp->authenticated = temp->always_authenticated; |
7c1c2871 | 529 | } |
bd1b331f | 530 | |
fda714c2 TH |
531 | /** |
532 | * Since the master is disappearing, so is the | |
533 | * possibility to lock. | |
534 | */ | |
535 | ||
536 | if (master->lock.hw_lock) { | |
537 | if (dev->sigdata.lock == master->lock.hw_lock) | |
538 | dev->sigdata.lock = NULL; | |
539 | master->lock.hw_lock = NULL; | |
540 | master->lock.file_priv = NULL; | |
541 | wake_up_interruptible_all(&master->lock.lock_queue); | |
542 | } | |
543 | ||
7c1c2871 DA |
544 | if (file_priv->minor->master == file_priv->master) { |
545 | /* drop the reference held my the minor */ | |
862302ff TH |
546 | if (dev->driver->master_drop) |
547 | dev->driver->master_drop(dev, file_priv, true); | |
7c1c2871 DA |
548 | drm_master_put(&file_priv->minor->master); |
549 | } | |
1da177e4 | 550 | } |
7c1c2871 | 551 | |
949c4a34 IH |
552 | BUG_ON(dev->dev_mapping == NULL); |
553 | iput(container_of(dev->dev_mapping, struct inode, i_data)); | |
554 | ||
7c1c2871 | 555 | /* drop the reference held my the file priv */ |
1793126f DH |
556 | if (file_priv->master) |
557 | drm_master_put(&file_priv->master); | |
7c1c2871 | 558 | file_priv->is_master = 0; |
6c340eac | 559 | list_del(&file_priv->lhead); |
30e2fb18 | 560 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 561 | |
22eae947 | 562 | if (dev->driver->postclose) |
6c340eac | 563 | dev->driver->postclose(dev, file_priv); |
3248877e | 564 | |
319c933c | 565 | |
3248877e DA |
566 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
567 | drm_prime_destroy_file_private(&file_priv->prime); | |
568 | ||
5fce5e0b | 569 | put_pid(file_priv->pid); |
9a298b2a | 570 | kfree(file_priv); |
1da177e4 LT |
571 | |
572 | /* ======================================================== | |
573 | * End inline drm_release | |
574 | */ | |
575 | ||
b5e89ed5 | 576 | if (!--dev->open_count) { |
43d1337c | 577 | retcode = drm_lastclose(dev); |
2c07a21d DA |
578 | if (drm_device_is_unplugged(dev)) |
579 | drm_put_dev(dev); | |
1da177e4 | 580 | } |
58374713 | 581 | mutex_unlock(&drm_global_mutex); |
1da177e4 LT |
582 | |
583 | return retcode; | |
584 | } | |
585 | EXPORT_SYMBOL(drm_release); | |
586 | ||
c9a9c5e0 KH |
587 | static bool |
588 | drm_dequeue_event(struct drm_file *file_priv, | |
589 | size_t total, size_t max, struct drm_pending_event **out) | |
590 | { | |
591 | struct drm_device *dev = file_priv->minor->dev; | |
592 | struct drm_pending_event *e; | |
593 | unsigned long flags; | |
594 | bool ret = false; | |
595 | ||
596 | spin_lock_irqsave(&dev->event_lock, flags); | |
597 | ||
598 | *out = NULL; | |
599 | if (list_empty(&file_priv->event_list)) | |
600 | goto out; | |
601 | e = list_first_entry(&file_priv->event_list, | |
602 | struct drm_pending_event, link); | |
603 | if (e->event->length + total > max) | |
604 | goto out; | |
605 | ||
606 | file_priv->event_space += e->event->length; | |
607 | list_del(&e->link); | |
608 | *out = e; | |
609 | ret = true; | |
610 | ||
611 | out: | |
612 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
613 | return ret; | |
614 | } | |
615 | ||
616 | ssize_t drm_read(struct file *filp, char __user *buffer, | |
617 | size_t count, loff_t *offset) | |
618 | { | |
619 | struct drm_file *file_priv = filp->private_data; | |
620 | struct drm_pending_event *e; | |
621 | size_t total; | |
622 | ssize_t ret; | |
623 | ||
624 | ret = wait_event_interruptible(file_priv->event_wait, | |
625 | !list_empty(&file_priv->event_list)); | |
626 | if (ret < 0) | |
627 | return ret; | |
628 | ||
629 | total = 0; | |
630 | while (drm_dequeue_event(file_priv, total, count, &e)) { | |
631 | if (copy_to_user(buffer + total, | |
632 | e->event, e->event->length)) { | |
633 | total = -EFAULT; | |
634 | break; | |
635 | } | |
636 | ||
637 | total += e->event->length; | |
638 | e->destroy(e); | |
639 | } | |
640 | ||
641 | return total; | |
642 | } | |
643 | EXPORT_SYMBOL(drm_read); | |
644 | ||
1da177e4 LT |
645 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
646 | { | |
c9a9c5e0 KH |
647 | struct drm_file *file_priv = filp->private_data; |
648 | unsigned int mask = 0; | |
649 | ||
650 | poll_wait(filp, &file_priv->event_wait, wait); | |
651 | ||
652 | if (!list_empty(&file_priv->event_list)) | |
653 | mask |= POLLIN | POLLRDNORM; | |
654 | ||
655 | return mask; | |
1da177e4 | 656 | } |
b5e89ed5 | 657 | EXPORT_SYMBOL(drm_poll); |