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Commit | Line | Data |
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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 | |
b5e89ed5 | 46 | static int drm_open_helper(struct inode *inode, struct file *filp, |
f4aede2e | 47 | struct drm_minor *minor); |
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 | { |
1616c525 | 82 | struct drm_device *dev; |
2c14f28b | 83 | struct drm_minor *minor; |
1616c525 | 84 | int retcode; |
fdb40a08 | 85 | int need_setup = 0; |
b5e89ed5 | 86 | |
1616c525 DH |
87 | minor = drm_minor_acquire(iminor(inode)); |
88 | if (IS_ERR(minor)) | |
89 | return PTR_ERR(minor); | |
2c07a21d | 90 | |
1616c525 | 91 | dev = minor->dev; |
fdb40a08 IH |
92 | if (!dev->open_count++) |
93 | need_setup = 1; | |
fdb40a08 | 94 | |
6796cb16 DH |
95 | /* share address_space across all char-devs of a single device */ |
96 | filp->f_mapping = dev->anon_inode->i_mapping; | |
fdb40a08 | 97 | |
f4aede2e | 98 | retcode = drm_open_helper(inode, filp, minor); |
fdb40a08 IH |
99 | if (retcode) |
100 | goto err_undo; | |
fdb40a08 IH |
101 | if (need_setup) { |
102 | retcode = drm_setup(dev); | |
103 | if (retcode) | |
104 | goto err_undo; | |
f453ba04 | 105 | } |
fdb40a08 | 106 | return 0; |
a2c0a97b | 107 | |
fdb40a08 | 108 | err_undo: |
fdb40a08 | 109 | dev->open_count--; |
1616c525 | 110 | drm_minor_release(minor); |
1da177e4 LT |
111 | return retcode; |
112 | } | |
113 | EXPORT_SYMBOL(drm_open); | |
114 | ||
d985c108 DA |
115 | /** |
116 | * File \c open operation. | |
117 | * | |
118 | * \param inode device inode. | |
119 | * \param filp file pointer. | |
120 | * | |
121 | * Puts the dev->fops corresponding to the device minor number into | |
122 | * \p filp, call the \c open method, and restore the file operations. | |
123 | */ | |
124 | int drm_stub_open(struct inode *inode, struct file *filp) | |
125 | { | |
1616c525 | 126 | struct drm_device *dev; |
2c14f28b | 127 | struct drm_minor *minor; |
d985c108 | 128 | int err = -ENODEV; |
e84f9e57 | 129 | const struct file_operations *new_fops; |
d985c108 DA |
130 | |
131 | DRM_DEBUG("\n"); | |
132 | ||
58374713 | 133 | mutex_lock(&drm_global_mutex); |
1616c525 DH |
134 | minor = drm_minor_acquire(iminor(inode)); |
135 | if (IS_ERR(minor)) | |
136 | goto out_unlock; | |
2c07a21d | 137 | |
1616c525 | 138 | dev = minor->dev; |
e84f9e57 AV |
139 | new_fops = fops_get(dev->driver->fops); |
140 | if (!new_fops) | |
1616c525 | 141 | goto out_release; |
d985c108 | 142 | |
e84f9e57 AV |
143 | replace_fops(filp, new_fops); |
144 | if (filp->f_op->open) | |
145 | err = filp->f_op->open(inode, filp); | |
1616c525 DH |
146 | |
147 | out_release: | |
148 | drm_minor_release(minor); | |
149 | out_unlock: | |
58374713 | 150 | mutex_unlock(&drm_global_mutex); |
d985c108 DA |
151 | return err; |
152 | } | |
153 | ||
154 | /** | |
155 | * Check whether DRI will run on this CPU. | |
156 | * | |
157 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. | |
158 | */ | |
159 | static int drm_cpu_valid(void) | |
160 | { | |
161 | #if defined(__i386__) | |
162 | if (boot_cpu_data.x86 == 3) | |
163 | return 0; /* No cmpxchg on a 386 */ | |
164 | #endif | |
165 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
166 | return 0; /* No cmpxchg before v9 sparc. */ | |
167 | #endif | |
168 | return 1; | |
169 | } | |
170 | ||
171 | /** | |
172 | * Called whenever a process opens /dev/drm. | |
173 | * | |
174 | * \param inode device inode. | |
175 | * \param filp file pointer. | |
f4aede2e | 176 | * \param minor acquired minor-object. |
d985c108 DA |
177 | * \return zero on success or a negative number on failure. |
178 | * | |
179 | * Creates and initializes a drm_file structure for the file private data in \p | |
180 | * filp and add it into the double linked list in \p dev. | |
181 | */ | |
182 | static int drm_open_helper(struct inode *inode, struct file *filp, | |
f4aede2e | 183 | struct drm_minor *minor) |
d985c108 | 184 | { |
f4aede2e | 185 | struct drm_device *dev = minor->dev; |
84b1fd10 | 186 | struct drm_file *priv; |
d985c108 DA |
187 | int ret; |
188 | ||
189 | if (filp->f_flags & O_EXCL) | |
190 | return -EBUSY; /* No exclusive opens */ | |
191 | if (!drm_cpu_valid()) | |
192 | return -EINVAL; | |
13bb9cc8 | 193 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF) |
5bcf719b | 194 | return -EINVAL; |
d985c108 | 195 | |
f4aede2e | 196 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index); |
d985c108 | 197 | |
6ebc22e6 | 198 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
d985c108 DA |
199 | if (!priv) |
200 | return -ENOMEM; | |
201 | ||
d985c108 | 202 | filp->private_data = priv; |
6c340eac | 203 | priv->filp = filp; |
2df68b43 | 204 | priv->uid = current_euid(); |
5fce5e0b | 205 | priv->pid = get_pid(task_pid(current)); |
f4aede2e | 206 | priv->minor = minor; |
df9b6a9c | 207 | |
d985c108 | 208 | /* for compatibility root is always authenticated */ |
1020dc69 CW |
209 | priv->always_authenticated = capable(CAP_SYS_ADMIN); |
210 | priv->authenticated = priv->always_authenticated; | |
d985c108 DA |
211 | priv->lock_count = 0; |
212 | ||
bd1b331f | 213 | INIT_LIST_HEAD(&priv->lhead); |
f453ba04 | 214 | INIT_LIST_HEAD(&priv->fbs); |
4b096ac1 | 215 | mutex_init(&priv->fbs_lock); |
c9a9c5e0 KH |
216 | INIT_LIST_HEAD(&priv->event_list); |
217 | init_waitqueue_head(&priv->event_wait); | |
218 | priv->event_space = 4096; /* set aside 4k for event buffer */ | |
bd1b331f | 219 | |
673a394b EA |
220 | if (dev->driver->driver_features & DRIVER_GEM) |
221 | drm_gem_open(dev, priv); | |
222 | ||
3248877e DA |
223 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
224 | drm_prime_init_file_private(&priv->prime); | |
225 | ||
d985c108 DA |
226 | if (dev->driver->open) { |
227 | ret = dev->driver->open(dev, priv); | |
228 | if (ret < 0) | |
df9b6a9c | 229 | goto out_prime_destroy; |
d985c108 DA |
230 | } |
231 | ||
1793126f DH |
232 | /* if there is no current master make this fd it, but do not create |
233 | * any master object for render clients */ | |
c996fd0b | 234 | mutex_lock(&dev->master_mutex); |
43683057 | 235 | if (drm_is_primary_client(priv) && !priv->minor->master) { |
7c1c2871 DA |
236 | /* create a new master */ |
237 | priv->minor->master = drm_master_create(priv->minor); | |
238 | if (!priv->minor->master) { | |
239 | ret = -ENOMEM; | |
df9b6a9c | 240 | goto out_close; |
7c1c2871 DA |
241 | } |
242 | ||
243 | priv->is_master = 1; | |
244 | /* take another reference for the copy in the local file priv */ | |
245 | priv->master = drm_master_get(priv->minor->master); | |
7c1c2871 DA |
246 | priv->authenticated = 1; |
247 | ||
7c1c2871 DA |
248 | if (dev->driver->master_create) { |
249 | ret = dev->driver->master_create(dev, priv->master); | |
250 | if (ret) { | |
7c1c2871 DA |
251 | /* drop both references if this fails */ |
252 | drm_master_put(&priv->minor->master); | |
253 | drm_master_put(&priv->master); | |
df9b6a9c | 254 | goto out_close; |
7c1c2871 DA |
255 | } |
256 | } | |
862302ff TH |
257 | if (dev->driver->master_set) { |
258 | ret = dev->driver->master_set(dev, priv, true); | |
259 | if (ret) { | |
260 | /* drop both references if this fails */ | |
261 | drm_master_put(&priv->minor->master); | |
262 | drm_master_put(&priv->master); | |
df9b6a9c | 263 | goto out_close; |
862302ff TH |
264 | } |
265 | } | |
43683057 | 266 | } else if (drm_is_primary_client(priv)) { |
7c1c2871 DA |
267 | /* get a reference to the master */ |
268 | priv->master = drm_master_get(priv->minor->master); | |
7c1c2871 | 269 | } |
c996fd0b | 270 | mutex_unlock(&dev->master_mutex); |
bd1b331f | 271 | |
7c1c2871 | 272 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 273 | list_add(&priv->lhead, &dev->filelist); |
30e2fb18 | 274 | mutex_unlock(&dev->struct_mutex); |
d985c108 DA |
275 | |
276 | #ifdef __alpha__ | |
277 | /* | |
278 | * Default the hose | |
279 | */ | |
280 | if (!dev->hose) { | |
281 | struct pci_dev *pci_dev; | |
282 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); | |
283 | if (pci_dev) { | |
284 | dev->hose = pci_dev->sysdata; | |
285 | pci_dev_put(pci_dev); | |
286 | } | |
287 | if (!dev->hose) { | |
59c1ad3b YW |
288 | struct pci_bus *b = list_entry(pci_root_buses.next, |
289 | struct pci_bus, node); | |
d985c108 DA |
290 | if (b) |
291 | dev->hose = b->sysdata; | |
292 | } | |
293 | } | |
294 | #endif | |
295 | ||
296 | return 0; | |
df9b6a9c SWK |
297 | |
298 | out_close: | |
c996fd0b | 299 | mutex_unlock(&dev->master_mutex); |
df9b6a9c SWK |
300 | if (dev->driver->postclose) |
301 | dev->driver->postclose(dev, priv); | |
302 | out_prime_destroy: | |
303 | if (drm_core_check_feature(dev, DRIVER_PRIME)) | |
304 | drm_prime_destroy_file_private(&priv->prime); | |
305 | if (dev->driver->driver_features & DRIVER_GEM) | |
306 | drm_gem_release(dev, priv); | |
df9b6a9c | 307 | put_pid(priv->pid); |
9a298b2a | 308 | kfree(priv); |
d985c108 DA |
309 | filp->private_data = NULL; |
310 | return ret; | |
311 | } | |
312 | ||
7c1c2871 DA |
313 | static void drm_master_release(struct drm_device *dev, struct file *filp) |
314 | { | |
315 | struct drm_file *file_priv = filp->private_data; | |
316 | ||
7c1c2871 DA |
317 | if (drm_i_have_hw_lock(dev, file_priv)) { |
318 | DRM_DEBUG("File %p released, freeing lock for context %d\n", | |
319 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
320 | drm_lock_free(&file_priv->master->lock, | |
321 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
322 | } | |
7c1c2871 DA |
323 | } |
324 | ||
c9a9c5e0 KH |
325 | static void drm_events_release(struct drm_file *file_priv) |
326 | { | |
327 | struct drm_device *dev = file_priv->minor->dev; | |
328 | struct drm_pending_event *e, *et; | |
329 | struct drm_pending_vblank_event *v, *vt; | |
330 | unsigned long flags; | |
331 | ||
332 | spin_lock_irqsave(&dev->event_lock, flags); | |
333 | ||
334 | /* Remove pending flips */ | |
335 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) | |
336 | if (v->base.file_priv == file_priv) { | |
337 | list_del(&v->base.link); | |
338 | drm_vblank_put(dev, v->pipe); | |
339 | v->base.destroy(&v->base); | |
340 | } | |
341 | ||
342 | /* Remove unconsumed events */ | |
1dda6805 YC |
343 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) { |
344 | list_del(&e->link); | |
c9a9c5e0 | 345 | e->destroy(e); |
1dda6805 | 346 | } |
c9a9c5e0 KH |
347 | |
348 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
349 | } | |
350 | ||
1c8887dd DH |
351 | /** |
352 | * drm_legacy_dev_reinit | |
353 | * | |
354 | * Reinitializes a legacy/ums drm device in it's lastclose function. | |
355 | */ | |
356 | static void drm_legacy_dev_reinit(struct drm_device *dev) | |
357 | { | |
1c8887dd DH |
358 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
359 | return; | |
360 | ||
1c8887dd DH |
361 | dev->sigdata.lock = NULL; |
362 | ||
363 | dev->context_flag = 0; | |
364 | dev->last_context = 0; | |
365 | dev->if_version = 0; | |
366 | } | |
367 | ||
368 | /** | |
369 | * Take down the DRM device. | |
370 | * | |
371 | * \param dev DRM device structure. | |
372 | * | |
373 | * Frees every resource in \p dev. | |
374 | * | |
375 | * \sa drm_device | |
376 | */ | |
377 | int drm_lastclose(struct drm_device * dev) | |
378 | { | |
379 | struct drm_vma_entry *vma, *vma_temp; | |
380 | ||
381 | DRM_DEBUG("\n"); | |
382 | ||
383 | if (dev->driver->lastclose) | |
384 | dev->driver->lastclose(dev); | |
385 | DRM_DEBUG("driver lastclose completed\n"); | |
386 | ||
387 | if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) | |
388 | drm_irq_uninstall(dev); | |
389 | ||
390 | mutex_lock(&dev->struct_mutex); | |
391 | ||
392 | drm_agp_clear(dev); | |
393 | ||
394 | drm_legacy_sg_cleanup(dev); | |
395 | ||
396 | /* Clear vma list (only built for debugging) */ | |
397 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { | |
398 | list_del(&vma->head); | |
399 | kfree(vma); | |
400 | } | |
401 | ||
402 | drm_legacy_dma_takedown(dev); | |
403 | ||
1c8887dd DH |
404 | mutex_unlock(&dev->struct_mutex); |
405 | ||
406 | drm_legacy_dev_reinit(dev); | |
407 | ||
408 | DRM_DEBUG("lastclose completed\n"); | |
409 | return 0; | |
410 | } | |
411 | ||
1da177e4 LT |
412 | /** |
413 | * Release file. | |
414 | * | |
415 | * \param inode device inode | |
6c340eac | 416 | * \param file_priv DRM file private. |
1da177e4 LT |
417 | * \return zero on success or a negative number on failure. |
418 | * | |
419 | * If the hardware lock is held then free it, and take it again for the kernel | |
420 | * context since it's necessary to reclaim buffers. Unlink the file private | |
421 | * data from its list and free it. Decreases the open count and if it reaches | |
22eae947 | 422 | * zero calls drm_lastclose(). |
1da177e4 | 423 | */ |
b5e89ed5 | 424 | int drm_release(struct inode *inode, struct file *filp) |
1da177e4 | 425 | { |
6c340eac | 426 | struct drm_file *file_priv = filp->private_data; |
1616c525 DH |
427 | struct drm_minor *minor = file_priv->minor; |
428 | struct drm_device *dev = minor->dev; | |
1da177e4 LT |
429 | int retcode = 0; |
430 | ||
58374713 | 431 | mutex_lock(&drm_global_mutex); |
1da177e4 | 432 | |
b5e89ed5 | 433 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
1da177e4 | 434 | |
22eae947 | 435 | if (dev->driver->preclose) |
6c340eac | 436 | dev->driver->preclose(dev, file_priv); |
1da177e4 LT |
437 | |
438 | /* ======================================================== | |
439 | * Begin inline drm_release | |
440 | */ | |
441 | ||
b5e89ed5 | 442 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
ba25f9dc | 443 | task_pid_nr(current), |
5817878c | 444 | (long)old_encode_dev(file_priv->minor->kdev->devt), |
b5e89ed5 DA |
445 | dev->open_count); |
446 | ||
598781d7 TH |
447 | /* Release any auth tokens that might point to this file_priv, |
448 | (do that under the drm_global_mutex) */ | |
449 | if (file_priv->magic) | |
450 | (void) drm_remove_magic(file_priv->master, file_priv->magic); | |
451 | ||
7c1c2871 DA |
452 | /* if the master has gone away we can't do anything with the lock */ |
453 | if (file_priv->minor->master) | |
454 | drm_master_release(dev, filp); | |
1da177e4 | 455 | |
67cb4b4d DV |
456 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
457 | drm_core_reclaim_buffers(dev, file_priv); | |
458 | ||
c9a9c5e0 KH |
459 | drm_events_release(file_priv); |
460 | ||
ea39f835 KH |
461 | if (dev->driver->driver_features & DRIVER_MODESET) |
462 | drm_fb_release(file_priv); | |
463 | ||
4e47e02d P |
464 | if (dev->driver->driver_features & DRIVER_GEM) |
465 | drm_gem_release(dev, file_priv); | |
466 | ||
c21eb21c DA |
467 | mutex_lock(&dev->ctxlist_mutex); |
468 | if (!list_empty(&dev->ctxlist)) { | |
469 | struct drm_ctx_list *pos, *n; | |
470 | ||
471 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { | |
472 | if (pos->tag == file_priv && | |
473 | pos->handle != DRM_KERNEL_CONTEXT) { | |
474 | if (dev->driver->context_dtor) | |
475 | dev->driver->context_dtor(dev, | |
476 | pos->handle); | |
477 | ||
478 | drm_ctxbitmap_free(dev, pos->handle); | |
479 | ||
480 | list_del(&pos->head); | |
481 | kfree(pos); | |
c21eb21c DA |
482 | } |
483 | } | |
484 | } | |
485 | mutex_unlock(&dev->ctxlist_mutex); | |
1da177e4 | 486 | |
c996fd0b | 487 | mutex_lock(&dev->master_mutex); |
7c1c2871 DA |
488 | |
489 | if (file_priv->is_master) { | |
fda714c2 | 490 | struct drm_master *master = file_priv->master; |
84b1fd10 | 491 | struct drm_file *temp; |
c996fd0b TH |
492 | |
493 | mutex_lock(&dev->struct_mutex); | |
7c1c2871 DA |
494 | list_for_each_entry(temp, &dev->filelist, lhead) { |
495 | if ((temp->master == file_priv->master) && | |
496 | (temp != file_priv)) | |
1020dc69 | 497 | temp->authenticated = temp->always_authenticated; |
7c1c2871 | 498 | } |
bd1b331f | 499 | |
fda714c2 TH |
500 | /** |
501 | * Since the master is disappearing, so is the | |
502 | * possibility to lock. | |
503 | */ | |
504 | ||
505 | if (master->lock.hw_lock) { | |
506 | if (dev->sigdata.lock == master->lock.hw_lock) | |
507 | dev->sigdata.lock = NULL; | |
508 | master->lock.hw_lock = NULL; | |
509 | master->lock.file_priv = NULL; | |
510 | wake_up_interruptible_all(&master->lock.lock_queue); | |
511 | } | |
c996fd0b | 512 | mutex_unlock(&dev->struct_mutex); |
fda714c2 | 513 | |
7c1c2871 DA |
514 | if (file_priv->minor->master == file_priv->master) { |
515 | /* drop the reference held my the minor */ | |
862302ff TH |
516 | if (dev->driver->master_drop) |
517 | dev->driver->master_drop(dev, file_priv, true); | |
7c1c2871 DA |
518 | drm_master_put(&file_priv->minor->master); |
519 | } | |
1da177e4 | 520 | } |
7c1c2871 | 521 | |
c996fd0b | 522 | /* drop the master reference held by the file priv */ |
1793126f DH |
523 | if (file_priv->master) |
524 | drm_master_put(&file_priv->master); | |
7c1c2871 | 525 | file_priv->is_master = 0; |
c996fd0b TH |
526 | mutex_unlock(&dev->master_mutex); |
527 | ||
528 | mutex_lock(&dev->struct_mutex); | |
6c340eac | 529 | list_del(&file_priv->lhead); |
30e2fb18 | 530 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 531 | |
22eae947 | 532 | if (dev->driver->postclose) |
6c340eac | 533 | dev->driver->postclose(dev, file_priv); |
3248877e | 534 | |
319c933c | 535 | |
3248877e DA |
536 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
537 | drm_prime_destroy_file_private(&file_priv->prime); | |
538 | ||
5fce5e0b | 539 | put_pid(file_priv->pid); |
9a298b2a | 540 | kfree(file_priv); |
1da177e4 LT |
541 | |
542 | /* ======================================================== | |
543 | * End inline drm_release | |
544 | */ | |
545 | ||
b5e89ed5 | 546 | if (!--dev->open_count) { |
43d1337c | 547 | retcode = drm_lastclose(dev); |
2c07a21d DA |
548 | if (drm_device_is_unplugged(dev)) |
549 | drm_put_dev(dev); | |
1da177e4 | 550 | } |
58374713 | 551 | mutex_unlock(&drm_global_mutex); |
1da177e4 | 552 | |
1616c525 DH |
553 | drm_minor_release(minor); |
554 | ||
1da177e4 LT |
555 | return retcode; |
556 | } | |
557 | EXPORT_SYMBOL(drm_release); | |
558 | ||
c9a9c5e0 KH |
559 | static bool |
560 | drm_dequeue_event(struct drm_file *file_priv, | |
561 | size_t total, size_t max, struct drm_pending_event **out) | |
562 | { | |
563 | struct drm_device *dev = file_priv->minor->dev; | |
564 | struct drm_pending_event *e; | |
565 | unsigned long flags; | |
566 | bool ret = false; | |
567 | ||
568 | spin_lock_irqsave(&dev->event_lock, flags); | |
569 | ||
570 | *out = NULL; | |
571 | if (list_empty(&file_priv->event_list)) | |
572 | goto out; | |
573 | e = list_first_entry(&file_priv->event_list, | |
574 | struct drm_pending_event, link); | |
575 | if (e->event->length + total > max) | |
576 | goto out; | |
577 | ||
578 | file_priv->event_space += e->event->length; | |
579 | list_del(&e->link); | |
580 | *out = e; | |
581 | ret = true; | |
582 | ||
583 | out: | |
584 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
585 | return ret; | |
586 | } | |
587 | ||
588 | ssize_t drm_read(struct file *filp, char __user *buffer, | |
589 | size_t count, loff_t *offset) | |
590 | { | |
591 | struct drm_file *file_priv = filp->private_data; | |
592 | struct drm_pending_event *e; | |
593 | size_t total; | |
594 | ssize_t ret; | |
595 | ||
596 | ret = wait_event_interruptible(file_priv->event_wait, | |
597 | !list_empty(&file_priv->event_list)); | |
598 | if (ret < 0) | |
599 | return ret; | |
600 | ||
601 | total = 0; | |
602 | while (drm_dequeue_event(file_priv, total, count, &e)) { | |
603 | if (copy_to_user(buffer + total, | |
604 | e->event, e->event->length)) { | |
605 | total = -EFAULT; | |
606 | break; | |
607 | } | |
608 | ||
609 | total += e->event->length; | |
610 | e->destroy(e); | |
611 | } | |
612 | ||
613 | return total; | |
614 | } | |
615 | EXPORT_SYMBOL(drm_read); | |
616 | ||
1da177e4 LT |
617 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
618 | { | |
c9a9c5e0 KH |
619 | struct drm_file *file_priv = filp->private_data; |
620 | unsigned int mask = 0; | |
621 | ||
622 | poll_wait(filp, &file_priv->event_wait, wait); | |
623 | ||
624 | if (!list_empty(&file_priv->event_list)) | |
625 | mask |= POLLIN | POLLRDNORM; | |
626 | ||
627 | return mask; | |
1da177e4 | 628 | } |
b5e89ed5 | 629 | EXPORT_SYMBOL(drm_poll); |