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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 | |
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; | |
116 | atomic_inc(&dev->counts[_DRM_STAT_OPENS]); | |
117 | if (need_setup) { | |
118 | retcode = drm_setup(dev); | |
119 | if (retcode) | |
120 | goto err_undo; | |
f453ba04 | 121 | } |
fdb40a08 | 122 | return 0; |
a2c0a97b | 123 | |
fdb40a08 IH |
124 | err_undo: |
125 | mutex_lock(&dev->struct_mutex); | |
a8ec3a66 IH |
126 | filp->f_mapping = old_imapping; |
127 | inode->i_mapping = old_imapping; | |
fdb40a08 IH |
128 | iput(container_of(dev->dev_mapping, struct inode, i_data)); |
129 | dev->dev_mapping = old_mapping; | |
130 | mutex_unlock(&dev->struct_mutex); | |
131 | dev->open_count--; | |
1da177e4 LT |
132 | return retcode; |
133 | } | |
134 | EXPORT_SYMBOL(drm_open); | |
135 | ||
d985c108 DA |
136 | /** |
137 | * File \c open operation. | |
138 | * | |
139 | * \param inode device inode. | |
140 | * \param filp file pointer. | |
141 | * | |
142 | * Puts the dev->fops corresponding to the device minor number into | |
143 | * \p filp, call the \c open method, and restore the file operations. | |
144 | */ | |
145 | int drm_stub_open(struct inode *inode, struct file *filp) | |
146 | { | |
84b1fd10 | 147 | struct drm_device *dev = NULL; |
2c14f28b DA |
148 | struct drm_minor *minor; |
149 | int minor_id = iminor(inode); | |
d985c108 | 150 | int err = -ENODEV; |
99ac48f5 | 151 | const struct file_operations *old_fops; |
d985c108 DA |
152 | |
153 | DRM_DEBUG("\n"); | |
154 | ||
58374713 | 155 | mutex_lock(&drm_global_mutex); |
2c14f28b DA |
156 | minor = idr_find(&drm_minors_idr, minor_id); |
157 | if (!minor) | |
70ffa16e | 158 | goto out; |
d985c108 | 159 | |
2c14f28b | 160 | if (!(dev = minor->dev)) |
70ffa16e | 161 | goto out; |
d985c108 | 162 | |
2c07a21d DA |
163 | if (drm_device_is_unplugged(dev)) |
164 | goto out; | |
165 | ||
d985c108 | 166 | old_fops = filp->f_op; |
e08e96de | 167 | filp->f_op = fops_get(dev->driver->fops); |
f41ced8f LP |
168 | if (filp->f_op == NULL) { |
169 | filp->f_op = old_fops; | |
170 | goto out; | |
171 | } | |
d985c108 DA |
172 | if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { |
173 | fops_put(filp->f_op); | |
174 | filp->f_op = fops_get(old_fops); | |
175 | } | |
176 | fops_put(old_fops); | |
177 | ||
70ffa16e | 178 | out: |
58374713 | 179 | mutex_unlock(&drm_global_mutex); |
d985c108 DA |
180 | return err; |
181 | } | |
182 | ||
183 | /** | |
184 | * Check whether DRI will run on this CPU. | |
185 | * | |
186 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. | |
187 | */ | |
188 | static int drm_cpu_valid(void) | |
189 | { | |
190 | #if defined(__i386__) | |
191 | if (boot_cpu_data.x86 == 3) | |
192 | return 0; /* No cmpxchg on a 386 */ | |
193 | #endif | |
194 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
195 | return 0; /* No cmpxchg before v9 sparc. */ | |
196 | #endif | |
197 | return 1; | |
198 | } | |
199 | ||
200 | /** | |
201 | * Called whenever a process opens /dev/drm. | |
202 | * | |
203 | * \param inode device inode. | |
204 | * \param filp file pointer. | |
205 | * \param dev device. | |
206 | * \return zero on success or a negative number on failure. | |
207 | * | |
208 | * Creates and initializes a drm_file structure for the file private data in \p | |
209 | * filp and add it into the double linked list in \p dev. | |
210 | */ | |
211 | static int drm_open_helper(struct inode *inode, struct file *filp, | |
84b1fd10 | 212 | struct drm_device * dev) |
d985c108 | 213 | { |
2c14f28b | 214 | int minor_id = iminor(inode); |
84b1fd10 | 215 | struct drm_file *priv; |
d985c108 DA |
216 | int ret; |
217 | ||
218 | if (filp->f_flags & O_EXCL) | |
219 | return -EBUSY; /* No exclusive opens */ | |
220 | if (!drm_cpu_valid()) | |
221 | return -EINVAL; | |
13bb9cc8 | 222 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF) |
5bcf719b | 223 | return -EINVAL; |
d985c108 | 224 | |
2c14f28b | 225 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); |
d985c108 | 226 | |
6ebc22e6 | 227 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
d985c108 DA |
228 | if (!priv) |
229 | return -ENOMEM; | |
230 | ||
d985c108 | 231 | filp->private_data = priv; |
6c340eac | 232 | priv->filp = filp; |
2df68b43 | 233 | priv->uid = current_euid(); |
5fce5e0b | 234 | priv->pid = get_pid(task_pid(current)); |
2c14f28b | 235 | priv->minor = idr_find(&drm_minors_idr, minor_id); |
df9b6a9c SWK |
236 | if (!priv->minor) { |
237 | ret = -ENODEV; | |
238 | goto out_put_pid; | |
239 | } | |
240 | ||
d985c108 DA |
241 | priv->ioctl_count = 0; |
242 | /* for compatibility root is always authenticated */ | |
243 | priv->authenticated = capable(CAP_SYS_ADMIN); | |
244 | priv->lock_count = 0; | |
245 | ||
bd1b331f | 246 | INIT_LIST_HEAD(&priv->lhead); |
f453ba04 | 247 | INIT_LIST_HEAD(&priv->fbs); |
4b096ac1 | 248 | mutex_init(&priv->fbs_lock); |
c9a9c5e0 KH |
249 | INIT_LIST_HEAD(&priv->event_list); |
250 | init_waitqueue_head(&priv->event_wait); | |
251 | priv->event_space = 4096; /* set aside 4k for event buffer */ | |
bd1b331f | 252 | |
673a394b EA |
253 | if (dev->driver->driver_features & DRIVER_GEM) |
254 | drm_gem_open(dev, priv); | |
255 | ||
3248877e DA |
256 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
257 | drm_prime_init_file_private(&priv->prime); | |
258 | ||
d985c108 DA |
259 | if (dev->driver->open) { |
260 | ret = dev->driver->open(dev, priv); | |
261 | if (ret < 0) | |
df9b6a9c | 262 | goto out_prime_destroy; |
d985c108 DA |
263 | } |
264 | ||
1793126f DH |
265 | /* if there is no current master make this fd it, but do not create |
266 | * any master object for render clients */ | |
30e2fb18 | 267 | mutex_lock(&dev->struct_mutex); |
1793126f | 268 | if (!priv->minor->master && !drm_is_render_client(priv)) { |
7c1c2871 DA |
269 | /* create a new master */ |
270 | priv->minor->master = drm_master_create(priv->minor); | |
271 | if (!priv->minor->master) { | |
dba5ed0c | 272 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 | 273 | ret = -ENOMEM; |
df9b6a9c | 274 | goto out_close; |
7c1c2871 DA |
275 | } |
276 | ||
277 | priv->is_master = 1; | |
278 | /* take another reference for the copy in the local file priv */ | |
279 | priv->master = drm_master_get(priv->minor->master); | |
280 | ||
281 | priv->authenticated = 1; | |
282 | ||
283 | mutex_unlock(&dev->struct_mutex); | |
284 | if (dev->driver->master_create) { | |
285 | ret = dev->driver->master_create(dev, priv->master); | |
286 | if (ret) { | |
287 | mutex_lock(&dev->struct_mutex); | |
288 | /* drop both references if this fails */ | |
289 | drm_master_put(&priv->minor->master); | |
290 | drm_master_put(&priv->master); | |
291 | mutex_unlock(&dev->struct_mutex); | |
df9b6a9c | 292 | goto out_close; |
7c1c2871 DA |
293 | } |
294 | } | |
862302ff TH |
295 | mutex_lock(&dev->struct_mutex); |
296 | if (dev->driver->master_set) { | |
297 | ret = dev->driver->master_set(dev, priv, true); | |
298 | if (ret) { | |
299 | /* drop both references if this fails */ | |
300 | drm_master_put(&priv->minor->master); | |
301 | drm_master_put(&priv->master); | |
302 | mutex_unlock(&dev->struct_mutex); | |
df9b6a9c | 303 | goto out_close; |
862302ff TH |
304 | } |
305 | } | |
1793126f | 306 | } else if (!drm_is_render_client(priv)) { |
7c1c2871 DA |
307 | /* get a reference to the master */ |
308 | priv->master = drm_master_get(priv->minor->master); | |
7c1c2871 | 309 | } |
1793126f | 310 | mutex_unlock(&dev->struct_mutex); |
bd1b331f | 311 | |
7c1c2871 | 312 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 313 | list_add(&priv->lhead, &dev->filelist); |
30e2fb18 | 314 | mutex_unlock(&dev->struct_mutex); |
d985c108 DA |
315 | |
316 | #ifdef __alpha__ | |
317 | /* | |
318 | * Default the hose | |
319 | */ | |
320 | if (!dev->hose) { | |
321 | struct pci_dev *pci_dev; | |
322 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); | |
323 | if (pci_dev) { | |
324 | dev->hose = pci_dev->sysdata; | |
325 | pci_dev_put(pci_dev); | |
326 | } | |
327 | if (!dev->hose) { | |
328 | struct pci_bus *b = pci_bus_b(pci_root_buses.next); | |
329 | if (b) | |
330 | dev->hose = b->sysdata; | |
331 | } | |
332 | } | |
333 | #endif | |
334 | ||
335 | return 0; | |
df9b6a9c SWK |
336 | |
337 | out_close: | |
338 | if (dev->driver->postclose) | |
339 | dev->driver->postclose(dev, priv); | |
340 | out_prime_destroy: | |
341 | if (drm_core_check_feature(dev, DRIVER_PRIME)) | |
342 | drm_prime_destroy_file_private(&priv->prime); | |
343 | if (dev->driver->driver_features & DRIVER_GEM) | |
344 | drm_gem_release(dev, priv); | |
345 | out_put_pid: | |
346 | put_pid(priv->pid); | |
9a298b2a | 347 | kfree(priv); |
d985c108 DA |
348 | filp->private_data = NULL; |
349 | return ret; | |
350 | } | |
351 | ||
7c1c2871 DA |
352 | static void drm_master_release(struct drm_device *dev, struct file *filp) |
353 | { | |
354 | struct drm_file *file_priv = filp->private_data; | |
355 | ||
7c1c2871 DA |
356 | if (drm_i_have_hw_lock(dev, file_priv)) { |
357 | DRM_DEBUG("File %p released, freeing lock for context %d\n", | |
358 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
359 | drm_lock_free(&file_priv->master->lock, | |
360 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
361 | } | |
7c1c2871 DA |
362 | } |
363 | ||
c9a9c5e0 KH |
364 | static void drm_events_release(struct drm_file *file_priv) |
365 | { | |
366 | struct drm_device *dev = file_priv->minor->dev; | |
367 | struct drm_pending_event *e, *et; | |
368 | struct drm_pending_vblank_event *v, *vt; | |
369 | unsigned long flags; | |
370 | ||
371 | spin_lock_irqsave(&dev->event_lock, flags); | |
372 | ||
373 | /* Remove pending flips */ | |
374 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) | |
375 | if (v->base.file_priv == file_priv) { | |
376 | list_del(&v->base.link); | |
377 | drm_vblank_put(dev, v->pipe); | |
378 | v->base.destroy(&v->base); | |
379 | } | |
380 | ||
381 | /* Remove unconsumed events */ | |
382 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) | |
383 | e->destroy(e); | |
384 | ||
385 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
386 | } | |
387 | ||
1da177e4 LT |
388 | /** |
389 | * Release file. | |
390 | * | |
391 | * \param inode device inode | |
6c340eac | 392 | * \param file_priv DRM file private. |
1da177e4 LT |
393 | * \return zero on success or a negative number on failure. |
394 | * | |
395 | * If the hardware lock is held then free it, and take it again for the kernel | |
396 | * context since it's necessary to reclaim buffers. Unlink the file private | |
397 | * data from its list and free it. Decreases the open count and if it reaches | |
22eae947 | 398 | * zero calls drm_lastclose(). |
1da177e4 | 399 | */ |
b5e89ed5 | 400 | int drm_release(struct inode *inode, struct file *filp) |
1da177e4 | 401 | { |
6c340eac | 402 | struct drm_file *file_priv = filp->private_data; |
2c14f28b | 403 | struct drm_device *dev = file_priv->minor->dev; |
1da177e4 LT |
404 | int retcode = 0; |
405 | ||
58374713 | 406 | mutex_lock(&drm_global_mutex); |
1da177e4 | 407 | |
b5e89ed5 | 408 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
1da177e4 | 409 | |
22eae947 | 410 | if (dev->driver->preclose) |
6c340eac | 411 | dev->driver->preclose(dev, file_priv); |
1da177e4 LT |
412 | |
413 | /* ======================================================== | |
414 | * Begin inline drm_release | |
415 | */ | |
416 | ||
b5e89ed5 | 417 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
ba25f9dc | 418 | task_pid_nr(current), |
2c14f28b | 419 | (long)old_encode_dev(file_priv->minor->device), |
b5e89ed5 DA |
420 | dev->open_count); |
421 | ||
598781d7 TH |
422 | /* Release any auth tokens that might point to this file_priv, |
423 | (do that under the drm_global_mutex) */ | |
424 | if (file_priv->magic) | |
425 | (void) drm_remove_magic(file_priv->master, file_priv->magic); | |
426 | ||
7c1c2871 DA |
427 | /* if the master has gone away we can't do anything with the lock */ |
428 | if (file_priv->minor->master) | |
429 | drm_master_release(dev, filp); | |
1da177e4 | 430 | |
67cb4b4d DV |
431 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
432 | drm_core_reclaim_buffers(dev, file_priv); | |
433 | ||
c9a9c5e0 KH |
434 | drm_events_release(file_priv); |
435 | ||
ea39f835 KH |
436 | if (dev->driver->driver_features & DRIVER_MODESET) |
437 | drm_fb_release(file_priv); | |
438 | ||
4e47e02d P |
439 | if (dev->driver->driver_features & DRIVER_GEM) |
440 | drm_gem_release(dev, file_priv); | |
441 | ||
c21eb21c DA |
442 | mutex_lock(&dev->ctxlist_mutex); |
443 | if (!list_empty(&dev->ctxlist)) { | |
444 | struct drm_ctx_list *pos, *n; | |
445 | ||
446 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { | |
447 | if (pos->tag == file_priv && | |
448 | pos->handle != DRM_KERNEL_CONTEXT) { | |
449 | if (dev->driver->context_dtor) | |
450 | dev->driver->context_dtor(dev, | |
451 | pos->handle); | |
452 | ||
453 | drm_ctxbitmap_free(dev, pos->handle); | |
454 | ||
455 | list_del(&pos->head); | |
456 | kfree(pos); | |
457 | --dev->ctx_count; | |
458 | } | |
459 | } | |
460 | } | |
461 | mutex_unlock(&dev->ctxlist_mutex); | |
1da177e4 | 462 | |
30e2fb18 | 463 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
464 | |
465 | if (file_priv->is_master) { | |
fda714c2 | 466 | struct drm_master *master = file_priv->master; |
84b1fd10 | 467 | struct drm_file *temp; |
7c1c2871 DA |
468 | list_for_each_entry(temp, &dev->filelist, lhead) { |
469 | if ((temp->master == file_priv->master) && | |
470 | (temp != file_priv)) | |
471 | temp->authenticated = 0; | |
472 | } | |
bd1b331f | 473 | |
fda714c2 TH |
474 | /** |
475 | * Since the master is disappearing, so is the | |
476 | * possibility to lock. | |
477 | */ | |
478 | ||
479 | if (master->lock.hw_lock) { | |
480 | if (dev->sigdata.lock == master->lock.hw_lock) | |
481 | dev->sigdata.lock = NULL; | |
482 | master->lock.hw_lock = NULL; | |
483 | master->lock.file_priv = NULL; | |
484 | wake_up_interruptible_all(&master->lock.lock_queue); | |
485 | } | |
486 | ||
7c1c2871 DA |
487 | if (file_priv->minor->master == file_priv->master) { |
488 | /* drop the reference held my the minor */ | |
862302ff TH |
489 | if (dev->driver->master_drop) |
490 | dev->driver->master_drop(dev, file_priv, true); | |
7c1c2871 DA |
491 | drm_master_put(&file_priv->minor->master); |
492 | } | |
1da177e4 | 493 | } |
7c1c2871 | 494 | |
949c4a34 IH |
495 | BUG_ON(dev->dev_mapping == NULL); |
496 | iput(container_of(dev->dev_mapping, struct inode, i_data)); | |
497 | ||
7c1c2871 | 498 | /* drop the reference held my the file priv */ |
1793126f DH |
499 | if (file_priv->master) |
500 | drm_master_put(&file_priv->master); | |
7c1c2871 | 501 | file_priv->is_master = 0; |
6c340eac | 502 | list_del(&file_priv->lhead); |
30e2fb18 | 503 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 504 | |
22eae947 | 505 | if (dev->driver->postclose) |
6c340eac | 506 | dev->driver->postclose(dev, file_priv); |
3248877e | 507 | |
319c933c | 508 | |
3248877e DA |
509 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
510 | drm_prime_destroy_file_private(&file_priv->prime); | |
511 | ||
5fce5e0b | 512 | put_pid(file_priv->pid); |
9a298b2a | 513 | kfree(file_priv); |
1da177e4 LT |
514 | |
515 | /* ======================================================== | |
516 | * End inline drm_release | |
517 | */ | |
518 | ||
b5e89ed5 | 519 | atomic_inc(&dev->counts[_DRM_STAT_CLOSES]); |
b5e89ed5 | 520 | if (!--dev->open_count) { |
7c1c2871 DA |
521 | if (atomic_read(&dev->ioctl_count)) { |
522 | DRM_ERROR("Device busy: %d\n", | |
523 | atomic_read(&dev->ioctl_count)); | |
58374713 | 524 | retcode = -EBUSY; |
1a72d65d CW |
525 | } else |
526 | retcode = drm_lastclose(dev); | |
2c07a21d DA |
527 | if (drm_device_is_unplugged(dev)) |
528 | drm_put_dev(dev); | |
1da177e4 | 529 | } |
58374713 | 530 | mutex_unlock(&drm_global_mutex); |
1da177e4 LT |
531 | |
532 | return retcode; | |
533 | } | |
534 | EXPORT_SYMBOL(drm_release); | |
535 | ||
c9a9c5e0 KH |
536 | static bool |
537 | drm_dequeue_event(struct drm_file *file_priv, | |
538 | size_t total, size_t max, struct drm_pending_event **out) | |
539 | { | |
540 | struct drm_device *dev = file_priv->minor->dev; | |
541 | struct drm_pending_event *e; | |
542 | unsigned long flags; | |
543 | bool ret = false; | |
544 | ||
545 | spin_lock_irqsave(&dev->event_lock, flags); | |
546 | ||
547 | *out = NULL; | |
548 | if (list_empty(&file_priv->event_list)) | |
549 | goto out; | |
550 | e = list_first_entry(&file_priv->event_list, | |
551 | struct drm_pending_event, link); | |
552 | if (e->event->length + total > max) | |
553 | goto out; | |
554 | ||
555 | file_priv->event_space += e->event->length; | |
556 | list_del(&e->link); | |
557 | *out = e; | |
558 | ret = true; | |
559 | ||
560 | out: | |
561 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
562 | return ret; | |
563 | } | |
564 | ||
565 | ssize_t drm_read(struct file *filp, char __user *buffer, | |
566 | size_t count, loff_t *offset) | |
567 | { | |
568 | struct drm_file *file_priv = filp->private_data; | |
569 | struct drm_pending_event *e; | |
570 | size_t total; | |
571 | ssize_t ret; | |
572 | ||
573 | ret = wait_event_interruptible(file_priv->event_wait, | |
574 | !list_empty(&file_priv->event_list)); | |
575 | if (ret < 0) | |
576 | return ret; | |
577 | ||
578 | total = 0; | |
579 | while (drm_dequeue_event(file_priv, total, count, &e)) { | |
580 | if (copy_to_user(buffer + total, | |
581 | e->event, e->event->length)) { | |
582 | total = -EFAULT; | |
583 | break; | |
584 | } | |
585 | ||
586 | total += e->event->length; | |
587 | e->destroy(e); | |
588 | } | |
589 | ||
590 | return total; | |
591 | } | |
592 | EXPORT_SYMBOL(drm_read); | |
593 | ||
1da177e4 LT |
594 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
595 | { | |
c9a9c5e0 KH |
596 | struct drm_file *file_priv = filp->private_data; |
597 | unsigned int mask = 0; | |
598 | ||
599 | poll_wait(filp, &file_priv->event_wait, wait); | |
600 | ||
601 | if (!list_empty(&file_priv->event_list)) | |
602 | mask |= POLLIN | POLLRDNORM; | |
603 | ||
604 | return mask; | |
1da177e4 | 605 | } |
b5e89ed5 | 606 | EXPORT_SYMBOL(drm_poll); |