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 | |
0d639883 | 42 | /* from BKL pushdown */ |
58374713 | 43 | DEFINE_MUTEX(drm_global_mutex); |
e3461a2b | 44 | EXPORT_SYMBOL(drm_global_mutex); |
58374713 | 45 | |
1dcc0ceb | 46 | static int drm_open_helper(struct file *filp, struct drm_minor *minor); |
c94f7029 | 47 | |
84b1fd10 | 48 | static int drm_setup(struct drm_device * dev) |
1da177e4 | 49 | { |
1da177e4 LT |
50 | int ret; |
51 | ||
7d14bb6b DV |
52 | if (dev->driver->firstopen && |
53 | !drm_core_check_feature(dev, DRIVER_MODESET)) { | |
22eae947 | 54 | ret = dev->driver->firstopen(dev); |
b5e89ed5 | 55 | if (ret != 0) |
1da177e4 LT |
56 | return ret; |
57 | } | |
58 | ||
f336ab76 DV |
59 | ret = drm_legacy_dma_setup(dev); |
60 | if (ret < 0) | |
61 | return ret; | |
1da177e4 | 62 | |
1da177e4 | 63 | |
b5e89ed5 | 64 | DRM_DEBUG("\n"); |
1da177e4 LT |
65 | return 0; |
66 | } | |
67 | ||
68 | /** | |
69 | * Open file. | |
b5e89ed5 | 70 | * |
1da177e4 LT |
71 | * \param inode device inode |
72 | * \param filp file pointer. | |
73 | * \return zero on success or a negative number on failure. | |
74 | * | |
75 | * Searches the DRM device with the same minor number, calls open_helper(), and | |
76 | * increments the device open count. If the open count was previous at zero, | |
77 | * i.e., it's the first that the device is open, then calls setup(). | |
78 | */ | |
b5e89ed5 | 79 | int drm_open(struct inode *inode, struct file *filp) |
1da177e4 | 80 | { |
1616c525 | 81 | struct drm_device *dev; |
2c14f28b | 82 | struct drm_minor *minor; |
1616c525 | 83 | int retcode; |
fdb40a08 | 84 | int need_setup = 0; |
b5e89ed5 | 85 | |
1616c525 DH |
86 | minor = drm_minor_acquire(iminor(inode)); |
87 | if (IS_ERR(minor)) | |
88 | return PTR_ERR(minor); | |
2c07a21d | 89 | |
1616c525 | 90 | dev = minor->dev; |
fdb40a08 IH |
91 | if (!dev->open_count++) |
92 | need_setup = 1; | |
fdb40a08 | 93 | |
6796cb16 DH |
94 | /* share address_space across all char-devs of a single device */ |
95 | filp->f_mapping = dev->anon_inode->i_mapping; | |
fdb40a08 | 96 | |
1dcc0ceb | 97 | retcode = drm_open_helper(filp, minor); |
fdb40a08 IH |
98 | if (retcode) |
99 | goto err_undo; | |
fdb40a08 IH |
100 | if (need_setup) { |
101 | retcode = drm_setup(dev); | |
102 | if (retcode) | |
103 | goto err_undo; | |
f453ba04 | 104 | } |
fdb40a08 | 105 | return 0; |
a2c0a97b | 106 | |
fdb40a08 | 107 | err_undo: |
fdb40a08 | 108 | dev->open_count--; |
1616c525 | 109 | drm_minor_release(minor); |
1da177e4 LT |
110 | return retcode; |
111 | } | |
112 | EXPORT_SYMBOL(drm_open); | |
113 | ||
d985c108 DA |
114 | /** |
115 | * File \c open operation. | |
116 | * | |
117 | * \param inode device inode. | |
118 | * \param filp file pointer. | |
119 | * | |
120 | * Puts the dev->fops corresponding to the device minor number into | |
121 | * \p filp, call the \c open method, and restore the file operations. | |
122 | */ | |
123 | int drm_stub_open(struct inode *inode, struct file *filp) | |
124 | { | |
1616c525 | 125 | struct drm_device *dev; |
2c14f28b | 126 | struct drm_minor *minor; |
d985c108 | 127 | int err = -ENODEV; |
e84f9e57 | 128 | const struct file_operations *new_fops; |
d985c108 DA |
129 | |
130 | DRM_DEBUG("\n"); | |
131 | ||
58374713 | 132 | mutex_lock(&drm_global_mutex); |
1616c525 DH |
133 | minor = drm_minor_acquire(iminor(inode)); |
134 | if (IS_ERR(minor)) | |
135 | goto out_unlock; | |
2c07a21d | 136 | |
1616c525 | 137 | dev = minor->dev; |
e84f9e57 AV |
138 | new_fops = fops_get(dev->driver->fops); |
139 | if (!new_fops) | |
1616c525 | 140 | goto out_release; |
d985c108 | 141 | |
e84f9e57 AV |
142 | replace_fops(filp, new_fops); |
143 | if (filp->f_op->open) | |
144 | err = filp->f_op->open(inode, filp); | |
1616c525 DH |
145 | |
146 | out_release: | |
147 | drm_minor_release(minor); | |
148 | out_unlock: | |
58374713 | 149 | mutex_unlock(&drm_global_mutex); |
d985c108 DA |
150 | return err; |
151 | } | |
152 | ||
153 | /** | |
154 | * Check whether DRI will run on this CPU. | |
155 | * | |
156 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. | |
157 | */ | |
158 | static int drm_cpu_valid(void) | |
159 | { | |
160 | #if defined(__i386__) | |
161 | if (boot_cpu_data.x86 == 3) | |
162 | return 0; /* No cmpxchg on a 386 */ | |
163 | #endif | |
164 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
165 | return 0; /* No cmpxchg before v9 sparc. */ | |
166 | #endif | |
167 | return 1; | |
168 | } | |
169 | ||
170 | /** | |
171 | * Called whenever a process opens /dev/drm. | |
172 | * | |
d985c108 | 173 | * \param filp file pointer. |
f4aede2e | 174 | * \param minor acquired minor-object. |
d985c108 DA |
175 | * \return zero on success or a negative number on failure. |
176 | * | |
177 | * Creates and initializes a drm_file structure for the file private data in \p | |
178 | * filp and add it into the double linked list in \p dev. | |
179 | */ | |
1dcc0ceb | 180 | static int drm_open_helper(struct file *filp, struct drm_minor *minor) |
d985c108 | 181 | { |
f4aede2e | 182 | struct drm_device *dev = minor->dev; |
84b1fd10 | 183 | struct drm_file *priv; |
d985c108 DA |
184 | int ret; |
185 | ||
186 | if (filp->f_flags & O_EXCL) | |
187 | return -EBUSY; /* No exclusive opens */ | |
188 | if (!drm_cpu_valid()) | |
189 | return -EINVAL; | |
13bb9cc8 | 190 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF) |
5bcf719b | 191 | return -EINVAL; |
d985c108 | 192 | |
f4aede2e | 193 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index); |
d985c108 | 194 | |
6ebc22e6 | 195 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
d985c108 DA |
196 | if (!priv) |
197 | return -ENOMEM; | |
198 | ||
d985c108 | 199 | filp->private_data = priv; |
6c340eac | 200 | priv->filp = filp; |
2df68b43 | 201 | priv->uid = current_euid(); |
5fce5e0b | 202 | priv->pid = get_pid(task_pid(current)); |
f4aede2e | 203 | priv->minor = minor; |
df9b6a9c | 204 | |
d985c108 | 205 | /* for compatibility root is always authenticated */ |
1020dc69 CW |
206 | priv->always_authenticated = capable(CAP_SYS_ADMIN); |
207 | priv->authenticated = priv->always_authenticated; | |
d985c108 DA |
208 | priv->lock_count = 0; |
209 | ||
bd1b331f | 210 | INIT_LIST_HEAD(&priv->lhead); |
f453ba04 | 211 | INIT_LIST_HEAD(&priv->fbs); |
4b096ac1 | 212 | mutex_init(&priv->fbs_lock); |
c9a9c5e0 KH |
213 | INIT_LIST_HEAD(&priv->event_list); |
214 | init_waitqueue_head(&priv->event_wait); | |
215 | priv->event_space = 4096; /* set aside 4k for event buffer */ | |
bd1b331f | 216 | |
673a394b EA |
217 | if (dev->driver->driver_features & DRIVER_GEM) |
218 | drm_gem_open(dev, priv); | |
219 | ||
3248877e DA |
220 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
221 | drm_prime_init_file_private(&priv->prime); | |
222 | ||
d985c108 DA |
223 | if (dev->driver->open) { |
224 | ret = dev->driver->open(dev, priv); | |
225 | if (ret < 0) | |
df9b6a9c | 226 | goto out_prime_destroy; |
d985c108 DA |
227 | } |
228 | ||
1793126f DH |
229 | /* if there is no current master make this fd it, but do not create |
230 | * any master object for render clients */ | |
c996fd0b | 231 | mutex_lock(&dev->master_mutex); |
43683057 | 232 | if (drm_is_primary_client(priv) && !priv->minor->master) { |
7c1c2871 DA |
233 | /* create a new master */ |
234 | priv->minor->master = drm_master_create(priv->minor); | |
235 | if (!priv->minor->master) { | |
236 | ret = -ENOMEM; | |
df9b6a9c | 237 | goto out_close; |
7c1c2871 DA |
238 | } |
239 | ||
240 | priv->is_master = 1; | |
241 | /* take another reference for the copy in the local file priv */ | |
242 | priv->master = drm_master_get(priv->minor->master); | |
7c1c2871 DA |
243 | priv->authenticated = 1; |
244 | ||
7c1c2871 DA |
245 | if (dev->driver->master_create) { |
246 | ret = dev->driver->master_create(dev, priv->master); | |
247 | if (ret) { | |
7c1c2871 DA |
248 | /* drop both references if this fails */ |
249 | drm_master_put(&priv->minor->master); | |
250 | drm_master_put(&priv->master); | |
df9b6a9c | 251 | goto out_close; |
7c1c2871 DA |
252 | } |
253 | } | |
862302ff TH |
254 | if (dev->driver->master_set) { |
255 | ret = dev->driver->master_set(dev, priv, true); | |
256 | if (ret) { | |
257 | /* drop both references if this fails */ | |
258 | drm_master_put(&priv->minor->master); | |
259 | drm_master_put(&priv->master); | |
df9b6a9c | 260 | goto out_close; |
862302ff TH |
261 | } |
262 | } | |
43683057 | 263 | } else if (drm_is_primary_client(priv)) { |
7c1c2871 DA |
264 | /* get a reference to the master */ |
265 | priv->master = drm_master_get(priv->minor->master); | |
7c1c2871 | 266 | } |
c996fd0b | 267 | mutex_unlock(&dev->master_mutex); |
bd1b331f | 268 | |
7c1c2871 | 269 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 270 | list_add(&priv->lhead, &dev->filelist); |
30e2fb18 | 271 | mutex_unlock(&dev->struct_mutex); |
d985c108 DA |
272 | |
273 | #ifdef __alpha__ | |
274 | /* | |
275 | * Default the hose | |
276 | */ | |
277 | if (!dev->hose) { | |
278 | struct pci_dev *pci_dev; | |
279 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); | |
280 | if (pci_dev) { | |
281 | dev->hose = pci_dev->sysdata; | |
282 | pci_dev_put(pci_dev); | |
283 | } | |
284 | if (!dev->hose) { | |
59c1ad3b YW |
285 | struct pci_bus *b = list_entry(pci_root_buses.next, |
286 | struct pci_bus, node); | |
d985c108 DA |
287 | if (b) |
288 | dev->hose = b->sysdata; | |
289 | } | |
290 | } | |
291 | #endif | |
292 | ||
293 | return 0; | |
df9b6a9c SWK |
294 | |
295 | out_close: | |
c996fd0b | 296 | mutex_unlock(&dev->master_mutex); |
df9b6a9c SWK |
297 | if (dev->driver->postclose) |
298 | dev->driver->postclose(dev, priv); | |
299 | out_prime_destroy: | |
300 | if (drm_core_check_feature(dev, DRIVER_PRIME)) | |
301 | drm_prime_destroy_file_private(&priv->prime); | |
302 | if (dev->driver->driver_features & DRIVER_GEM) | |
303 | drm_gem_release(dev, priv); | |
df9b6a9c | 304 | put_pid(priv->pid); |
9a298b2a | 305 | kfree(priv); |
d985c108 DA |
306 | filp->private_data = NULL; |
307 | return ret; | |
308 | } | |
309 | ||
7c1c2871 DA |
310 | static void drm_master_release(struct drm_device *dev, struct file *filp) |
311 | { | |
312 | struct drm_file *file_priv = filp->private_data; | |
313 | ||
7c1c2871 DA |
314 | if (drm_i_have_hw_lock(dev, file_priv)) { |
315 | DRM_DEBUG("File %p released, freeing lock for context %d\n", | |
316 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
317 | drm_lock_free(&file_priv->master->lock, | |
318 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
319 | } | |
7c1c2871 DA |
320 | } |
321 | ||
c9a9c5e0 KH |
322 | static void drm_events_release(struct drm_file *file_priv) |
323 | { | |
324 | struct drm_device *dev = file_priv->minor->dev; | |
325 | struct drm_pending_event *e, *et; | |
326 | struct drm_pending_vblank_event *v, *vt; | |
327 | unsigned long flags; | |
328 | ||
329 | spin_lock_irqsave(&dev->event_lock, flags); | |
330 | ||
331 | /* Remove pending flips */ | |
332 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) | |
333 | if (v->base.file_priv == file_priv) { | |
334 | list_del(&v->base.link); | |
335 | drm_vblank_put(dev, v->pipe); | |
336 | v->base.destroy(&v->base); | |
337 | } | |
338 | ||
339 | /* Remove unconsumed events */ | |
1dda6805 YC |
340 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) { |
341 | list_del(&e->link); | |
c9a9c5e0 | 342 | e->destroy(e); |
1dda6805 | 343 | } |
c9a9c5e0 KH |
344 | |
345 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
346 | } | |
347 | ||
1c8887dd DH |
348 | /** |
349 | * drm_legacy_dev_reinit | |
350 | * | |
351 | * Reinitializes a legacy/ums drm device in it's lastclose function. | |
352 | */ | |
353 | static void drm_legacy_dev_reinit(struct drm_device *dev) | |
354 | { | |
1c8887dd DH |
355 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
356 | return; | |
357 | ||
1c8887dd DH |
358 | dev->sigdata.lock = NULL; |
359 | ||
360 | dev->context_flag = 0; | |
361 | dev->last_context = 0; | |
362 | dev->if_version = 0; | |
363 | } | |
364 | ||
365 | /** | |
366 | * Take down the DRM device. | |
367 | * | |
368 | * \param dev DRM device structure. | |
369 | * | |
370 | * Frees every resource in \p dev. | |
371 | * | |
372 | * \sa drm_device | |
373 | */ | |
374 | int drm_lastclose(struct drm_device * dev) | |
375 | { | |
376 | struct drm_vma_entry *vma, *vma_temp; | |
377 | ||
378 | DRM_DEBUG("\n"); | |
379 | ||
380 | if (dev->driver->lastclose) | |
381 | dev->driver->lastclose(dev); | |
382 | DRM_DEBUG("driver lastclose completed\n"); | |
383 | ||
384 | if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) | |
385 | drm_irq_uninstall(dev); | |
386 | ||
387 | mutex_lock(&dev->struct_mutex); | |
388 | ||
389 | drm_agp_clear(dev); | |
390 | ||
391 | drm_legacy_sg_cleanup(dev); | |
392 | ||
393 | /* Clear vma list (only built for debugging) */ | |
394 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { | |
395 | list_del(&vma->head); | |
396 | kfree(vma); | |
397 | } | |
398 | ||
399 | drm_legacy_dma_takedown(dev); | |
400 | ||
1c8887dd DH |
401 | mutex_unlock(&dev->struct_mutex); |
402 | ||
403 | drm_legacy_dev_reinit(dev); | |
404 | ||
405 | DRM_DEBUG("lastclose completed\n"); | |
406 | return 0; | |
407 | } | |
408 | ||
1da177e4 LT |
409 | /** |
410 | * Release file. | |
411 | * | |
412 | * \param inode device inode | |
6c340eac | 413 | * \param file_priv DRM file private. |
1da177e4 LT |
414 | * \return zero on success or a negative number on failure. |
415 | * | |
416 | * If the hardware lock is held then free it, and take it again for the kernel | |
417 | * context since it's necessary to reclaim buffers. Unlink the file private | |
418 | * data from its list and free it. Decreases the open count and if it reaches | |
22eae947 | 419 | * zero calls drm_lastclose(). |
1da177e4 | 420 | */ |
b5e89ed5 | 421 | int drm_release(struct inode *inode, struct file *filp) |
1da177e4 | 422 | { |
6c340eac | 423 | struct drm_file *file_priv = filp->private_data; |
1616c525 DH |
424 | struct drm_minor *minor = file_priv->minor; |
425 | struct drm_device *dev = minor->dev; | |
1da177e4 LT |
426 | int retcode = 0; |
427 | ||
58374713 | 428 | mutex_lock(&drm_global_mutex); |
1da177e4 | 429 | |
b5e89ed5 | 430 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
1da177e4 | 431 | |
22eae947 | 432 | if (dev->driver->preclose) |
6c340eac | 433 | dev->driver->preclose(dev, file_priv); |
1da177e4 LT |
434 | |
435 | /* ======================================================== | |
436 | * Begin inline drm_release | |
437 | */ | |
438 | ||
b5e89ed5 | 439 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
ba25f9dc | 440 | task_pid_nr(current), |
5817878c | 441 | (long)old_encode_dev(file_priv->minor->kdev->devt), |
b5e89ed5 DA |
442 | dev->open_count); |
443 | ||
598781d7 TH |
444 | /* Release any auth tokens that might point to this file_priv, |
445 | (do that under the drm_global_mutex) */ | |
446 | if (file_priv->magic) | |
447 | (void) drm_remove_magic(file_priv->master, file_priv->magic); | |
448 | ||
7c1c2871 DA |
449 | /* if the master has gone away we can't do anything with the lock */ |
450 | if (file_priv->minor->master) | |
451 | drm_master_release(dev, filp); | |
1da177e4 | 452 | |
67cb4b4d DV |
453 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
454 | drm_core_reclaim_buffers(dev, file_priv); | |
455 | ||
c9a9c5e0 KH |
456 | drm_events_release(file_priv); |
457 | ||
ea39f835 KH |
458 | if (dev->driver->driver_features & DRIVER_MODESET) |
459 | drm_fb_release(file_priv); | |
460 | ||
4e47e02d P |
461 | if (dev->driver->driver_features & DRIVER_GEM) |
462 | drm_gem_release(dev, file_priv); | |
463 | ||
c21eb21c DA |
464 | mutex_lock(&dev->ctxlist_mutex); |
465 | if (!list_empty(&dev->ctxlist)) { | |
466 | struct drm_ctx_list *pos, *n; | |
467 | ||
468 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { | |
469 | if (pos->tag == file_priv && | |
470 | pos->handle != DRM_KERNEL_CONTEXT) { | |
471 | if (dev->driver->context_dtor) | |
472 | dev->driver->context_dtor(dev, | |
473 | pos->handle); | |
474 | ||
475 | drm_ctxbitmap_free(dev, pos->handle); | |
476 | ||
477 | list_del(&pos->head); | |
478 | kfree(pos); | |
c21eb21c DA |
479 | } |
480 | } | |
481 | } | |
482 | mutex_unlock(&dev->ctxlist_mutex); | |
1da177e4 | 483 | |
c996fd0b | 484 | mutex_lock(&dev->master_mutex); |
7c1c2871 DA |
485 | |
486 | if (file_priv->is_master) { | |
fda714c2 | 487 | struct drm_master *master = file_priv->master; |
84b1fd10 | 488 | struct drm_file *temp; |
c996fd0b TH |
489 | |
490 | mutex_lock(&dev->struct_mutex); | |
7c1c2871 DA |
491 | list_for_each_entry(temp, &dev->filelist, lhead) { |
492 | if ((temp->master == file_priv->master) && | |
493 | (temp != file_priv)) | |
1020dc69 | 494 | temp->authenticated = temp->always_authenticated; |
7c1c2871 | 495 | } |
bd1b331f | 496 | |
fda714c2 TH |
497 | /** |
498 | * Since the master is disappearing, so is the | |
499 | * possibility to lock. | |
500 | */ | |
501 | ||
502 | if (master->lock.hw_lock) { | |
503 | if (dev->sigdata.lock == master->lock.hw_lock) | |
504 | dev->sigdata.lock = NULL; | |
505 | master->lock.hw_lock = NULL; | |
506 | master->lock.file_priv = NULL; | |
507 | wake_up_interruptible_all(&master->lock.lock_queue); | |
508 | } | |
c996fd0b | 509 | mutex_unlock(&dev->struct_mutex); |
fda714c2 | 510 | |
7c1c2871 DA |
511 | if (file_priv->minor->master == file_priv->master) { |
512 | /* drop the reference held my the minor */ | |
862302ff TH |
513 | if (dev->driver->master_drop) |
514 | dev->driver->master_drop(dev, file_priv, true); | |
7c1c2871 DA |
515 | drm_master_put(&file_priv->minor->master); |
516 | } | |
1da177e4 | 517 | } |
7c1c2871 | 518 | |
c996fd0b | 519 | /* drop the master reference held by the file priv */ |
1793126f DH |
520 | if (file_priv->master) |
521 | drm_master_put(&file_priv->master); | |
7c1c2871 | 522 | file_priv->is_master = 0; |
c996fd0b TH |
523 | mutex_unlock(&dev->master_mutex); |
524 | ||
525 | mutex_lock(&dev->struct_mutex); | |
6c340eac | 526 | list_del(&file_priv->lhead); |
30e2fb18 | 527 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 528 | |
22eae947 | 529 | if (dev->driver->postclose) |
6c340eac | 530 | dev->driver->postclose(dev, file_priv); |
3248877e | 531 | |
319c933c | 532 | |
3248877e DA |
533 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
534 | drm_prime_destroy_file_private(&file_priv->prime); | |
535 | ||
5fce5e0b | 536 | put_pid(file_priv->pid); |
9a298b2a | 537 | kfree(file_priv); |
1da177e4 LT |
538 | |
539 | /* ======================================================== | |
540 | * End inline drm_release | |
541 | */ | |
542 | ||
b5e89ed5 | 543 | if (!--dev->open_count) { |
43d1337c | 544 | retcode = drm_lastclose(dev); |
2c07a21d DA |
545 | if (drm_device_is_unplugged(dev)) |
546 | drm_put_dev(dev); | |
1da177e4 | 547 | } |
58374713 | 548 | mutex_unlock(&drm_global_mutex); |
1da177e4 | 549 | |
1616c525 DH |
550 | drm_minor_release(minor); |
551 | ||
1da177e4 LT |
552 | return retcode; |
553 | } | |
554 | EXPORT_SYMBOL(drm_release); | |
555 | ||
c9a9c5e0 KH |
556 | static bool |
557 | drm_dequeue_event(struct drm_file *file_priv, | |
558 | size_t total, size_t max, struct drm_pending_event **out) | |
559 | { | |
560 | struct drm_device *dev = file_priv->minor->dev; | |
561 | struct drm_pending_event *e; | |
562 | unsigned long flags; | |
563 | bool ret = false; | |
564 | ||
565 | spin_lock_irqsave(&dev->event_lock, flags); | |
566 | ||
567 | *out = NULL; | |
568 | if (list_empty(&file_priv->event_list)) | |
569 | goto out; | |
570 | e = list_first_entry(&file_priv->event_list, | |
571 | struct drm_pending_event, link); | |
572 | if (e->event->length + total > max) | |
573 | goto out; | |
574 | ||
575 | file_priv->event_space += e->event->length; | |
576 | list_del(&e->link); | |
577 | *out = e; | |
578 | ret = true; | |
579 | ||
580 | out: | |
581 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | ssize_t drm_read(struct file *filp, char __user *buffer, | |
586 | size_t count, loff_t *offset) | |
587 | { | |
588 | struct drm_file *file_priv = filp->private_data; | |
589 | struct drm_pending_event *e; | |
590 | size_t total; | |
591 | ssize_t ret; | |
592 | ||
593 | ret = wait_event_interruptible(file_priv->event_wait, | |
594 | !list_empty(&file_priv->event_list)); | |
595 | if (ret < 0) | |
596 | return ret; | |
597 | ||
598 | total = 0; | |
599 | while (drm_dequeue_event(file_priv, total, count, &e)) { | |
600 | if (copy_to_user(buffer + total, | |
601 | e->event, e->event->length)) { | |
602 | total = -EFAULT; | |
603 | break; | |
604 | } | |
605 | ||
606 | total += e->event->length; | |
607 | e->destroy(e); | |
608 | } | |
609 | ||
610 | return total; | |
611 | } | |
612 | EXPORT_SYMBOL(drm_read); | |
613 | ||
1da177e4 LT |
614 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
615 | { | |
c9a9c5e0 KH |
616 | struct drm_file *file_priv = filp->private_data; |
617 | unsigned int mask = 0; | |
618 | ||
619 | poll_wait(filp, &file_priv->event_wait, wait); | |
620 | ||
621 | if (!list_empty(&file_priv->event_list)) | |
622 | mask |= POLLIN | POLLRDNORM; | |
623 | ||
624 | return mask; | |
1da177e4 | 625 | } |
b5e89ed5 | 626 | EXPORT_SYMBOL(drm_poll); |