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 LT |
50 | { |
51 | int i; | |
52 | int ret; | |
53 | ||
22eae947 DA |
54 | if (dev->driver->firstopen) { |
55 | ret = dev->driver->firstopen(dev); | |
b5e89ed5 | 56 | if (ret != 0) |
1da177e4 LT |
57 | return ret; |
58 | } | |
59 | ||
b5e89ed5 DA |
60 | atomic_set(&dev->ioctl_count, 0); |
61 | atomic_set(&dev->vma_count, 0); | |
1da177e4 | 62 | |
f453ba04 DA |
63 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && |
64 | !drm_core_check_feature(dev, DRIVER_MODESET)) { | |
65 | dev->buf_use = 0; | |
66 | atomic_set(&dev->buf_alloc, 0); | |
67 | ||
b5e89ed5 DA |
68 | i = drm_dma_setup(dev); |
69 | if (i < 0) | |
1da177e4 LT |
70 | return i; |
71 | } | |
72 | ||
3d77461e | 73 | for (i = 0; i < ARRAY_SIZE(dev->counts); i++) |
b5e89ed5 | 74 | atomic_set(&dev->counts[i], 0); |
1da177e4 | 75 | |
11d9c2fd | 76 | dev->sigdata.lock = NULL; |
7c1c2871 | 77 | |
1da177e4 LT |
78 | dev->context_flag = 0; |
79 | dev->interrupt_flag = 0; | |
80 | dev->dma_flag = 0; | |
81 | dev->last_context = 0; | |
82 | dev->last_switch = 0; | |
83 | dev->last_checked = 0; | |
b5e89ed5 | 84 | init_waitqueue_head(&dev->context_wait); |
1da177e4 LT |
85 | dev->if_version = 0; |
86 | ||
87 | dev->ctx_start = 0; | |
88 | dev->lck_start = 0; | |
89 | ||
1da177e4 | 90 | dev->buf_async = NULL; |
b5e89ed5 DA |
91 | init_waitqueue_head(&dev->buf_readers); |
92 | init_waitqueue_head(&dev->buf_writers); | |
1da177e4 | 93 | |
b5e89ed5 | 94 | DRM_DEBUG("\n"); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * The kernel's context could be created here, but is now created | |
b5e89ed5 | 98 | * in drm_dma_enqueue. This is more resource-efficient for |
1da177e4 LT |
99 | * hardware that does not do DMA, but may mean that |
100 | * drm_select_queue fails between the time the interrupt is | |
101 | * initialized and the time the queues are initialized. | |
102 | */ | |
1da177e4 LT |
103 | |
104 | return 0; | |
105 | } | |
106 | ||
107 | /** | |
108 | * Open file. | |
b5e89ed5 | 109 | * |
1da177e4 LT |
110 | * \param inode device inode |
111 | * \param filp file pointer. | |
112 | * \return zero on success or a negative number on failure. | |
113 | * | |
114 | * Searches the DRM device with the same minor number, calls open_helper(), and | |
115 | * increments the device open count. If the open count was previous at zero, | |
116 | * i.e., it's the first that the device is open, then calls setup(). | |
117 | */ | |
b5e89ed5 | 118 | int drm_open(struct inode *inode, struct file *filp) |
1da177e4 | 119 | { |
84b1fd10 | 120 | struct drm_device *dev = NULL; |
2c14f28b DA |
121 | int minor_id = iminor(inode); |
122 | struct drm_minor *minor; | |
1da177e4 | 123 | int retcode = 0; |
fdb40a08 IH |
124 | int need_setup = 0; |
125 | struct address_space *old_mapping; | |
1da177e4 | 126 | |
2c14f28b DA |
127 | minor = idr_find(&drm_minors_idr, minor_id); |
128 | if (!minor) | |
1da177e4 | 129 | return -ENODEV; |
b5e89ed5 | 130 | |
2c14f28b | 131 | if (!(dev = minor->dev)) |
1da177e4 | 132 | return -ENODEV; |
b5e89ed5 | 133 | |
2c07a21d DA |
134 | if (drm_device_is_unplugged(dev)) |
135 | return -ENODEV; | |
136 | ||
fdb40a08 IH |
137 | if (!dev->open_count++) |
138 | need_setup = 1; | |
139 | mutex_lock(&dev->struct_mutex); | |
140 | old_mapping = dev->dev_mapping; | |
141 | if (old_mapping == NULL) | |
142 | dev->dev_mapping = &inode->i_data; | |
143 | /* ihold ensures nobody can remove inode with our i_data */ | |
144 | ihold(container_of(dev->dev_mapping, struct inode, i_data)); | |
145 | inode->i_mapping = dev->dev_mapping; | |
146 | filp->f_mapping = dev->dev_mapping; | |
147 | mutex_unlock(&dev->struct_mutex); | |
148 | ||
b5e89ed5 | 149 | retcode = drm_open_helper(inode, filp, dev); |
fdb40a08 IH |
150 | if (retcode) |
151 | goto err_undo; | |
152 | atomic_inc(&dev->counts[_DRM_STAT_OPENS]); | |
153 | if (need_setup) { | |
154 | retcode = drm_setup(dev); | |
155 | if (retcode) | |
156 | goto err_undo; | |
f453ba04 | 157 | } |
fdb40a08 | 158 | return 0; |
a2c0a97b | 159 | |
fdb40a08 IH |
160 | err_undo: |
161 | mutex_lock(&dev->struct_mutex); | |
162 | filp->f_mapping = old_mapping; | |
163 | inode->i_mapping = old_mapping; | |
164 | iput(container_of(dev->dev_mapping, struct inode, i_data)); | |
165 | dev->dev_mapping = old_mapping; | |
166 | mutex_unlock(&dev->struct_mutex); | |
167 | dev->open_count--; | |
1da177e4 LT |
168 | return retcode; |
169 | } | |
170 | EXPORT_SYMBOL(drm_open); | |
171 | ||
d985c108 DA |
172 | /** |
173 | * File \c open operation. | |
174 | * | |
175 | * \param inode device inode. | |
176 | * \param filp file pointer. | |
177 | * | |
178 | * Puts the dev->fops corresponding to the device minor number into | |
179 | * \p filp, call the \c open method, and restore the file operations. | |
180 | */ | |
181 | int drm_stub_open(struct inode *inode, struct file *filp) | |
182 | { | |
84b1fd10 | 183 | struct drm_device *dev = NULL; |
2c14f28b DA |
184 | struct drm_minor *minor; |
185 | int minor_id = iminor(inode); | |
d985c108 | 186 | int err = -ENODEV; |
99ac48f5 | 187 | const struct file_operations *old_fops; |
d985c108 DA |
188 | |
189 | DRM_DEBUG("\n"); | |
190 | ||
58374713 | 191 | mutex_lock(&drm_global_mutex); |
2c14f28b DA |
192 | minor = idr_find(&drm_minors_idr, minor_id); |
193 | if (!minor) | |
70ffa16e | 194 | goto out; |
d985c108 | 195 | |
2c14f28b | 196 | if (!(dev = minor->dev)) |
70ffa16e | 197 | goto out; |
d985c108 | 198 | |
2c07a21d DA |
199 | if (drm_device_is_unplugged(dev)) |
200 | goto out; | |
201 | ||
d985c108 | 202 | old_fops = filp->f_op; |
e08e96de | 203 | filp->f_op = fops_get(dev->driver->fops); |
f41ced8f LP |
204 | if (filp->f_op == NULL) { |
205 | filp->f_op = old_fops; | |
206 | goto out; | |
207 | } | |
d985c108 DA |
208 | if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { |
209 | fops_put(filp->f_op); | |
210 | filp->f_op = fops_get(old_fops); | |
211 | } | |
212 | fops_put(old_fops); | |
213 | ||
70ffa16e | 214 | out: |
58374713 | 215 | mutex_unlock(&drm_global_mutex); |
d985c108 DA |
216 | return err; |
217 | } | |
218 | ||
219 | /** | |
220 | * Check whether DRI will run on this CPU. | |
221 | * | |
222 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. | |
223 | */ | |
224 | static int drm_cpu_valid(void) | |
225 | { | |
226 | #if defined(__i386__) | |
227 | if (boot_cpu_data.x86 == 3) | |
228 | return 0; /* No cmpxchg on a 386 */ | |
229 | #endif | |
230 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
231 | return 0; /* No cmpxchg before v9 sparc. */ | |
232 | #endif | |
233 | return 1; | |
234 | } | |
235 | ||
236 | /** | |
237 | * Called whenever a process opens /dev/drm. | |
238 | * | |
239 | * \param inode device inode. | |
240 | * \param filp file pointer. | |
241 | * \param dev device. | |
242 | * \return zero on success or a negative number on failure. | |
243 | * | |
244 | * Creates and initializes a drm_file structure for the file private data in \p | |
245 | * filp and add it into the double linked list in \p dev. | |
246 | */ | |
247 | static int drm_open_helper(struct inode *inode, struct file *filp, | |
84b1fd10 | 248 | struct drm_device * dev) |
d985c108 | 249 | { |
2c14f28b | 250 | int minor_id = iminor(inode); |
84b1fd10 | 251 | struct drm_file *priv; |
d985c108 DA |
252 | int ret; |
253 | ||
254 | if (filp->f_flags & O_EXCL) | |
255 | return -EBUSY; /* No exclusive opens */ | |
256 | if (!drm_cpu_valid()) | |
257 | return -EINVAL; | |
5bcf719b DA |
258 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON) |
259 | return -EINVAL; | |
d985c108 | 260 | |
2c14f28b | 261 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); |
d985c108 | 262 | |
6ebc22e6 | 263 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
d985c108 DA |
264 | if (!priv) |
265 | return -ENOMEM; | |
266 | ||
d985c108 | 267 | filp->private_data = priv; |
6c340eac | 268 | priv->filp = filp; |
2df68b43 | 269 | priv->uid = current_euid(); |
5fce5e0b | 270 | priv->pid = get_pid(task_pid(current)); |
2c14f28b | 271 | priv->minor = idr_find(&drm_minors_idr, minor_id); |
d985c108 DA |
272 | priv->ioctl_count = 0; |
273 | /* for compatibility root is always authenticated */ | |
274 | priv->authenticated = capable(CAP_SYS_ADMIN); | |
275 | priv->lock_count = 0; | |
276 | ||
bd1b331f | 277 | INIT_LIST_HEAD(&priv->lhead); |
f453ba04 | 278 | INIT_LIST_HEAD(&priv->fbs); |
4b096ac1 | 279 | mutex_init(&priv->fbs_lock); |
c9a9c5e0 KH |
280 | INIT_LIST_HEAD(&priv->event_list); |
281 | init_waitqueue_head(&priv->event_wait); | |
282 | priv->event_space = 4096; /* set aside 4k for event buffer */ | |
bd1b331f | 283 | |
673a394b EA |
284 | if (dev->driver->driver_features & DRIVER_GEM) |
285 | drm_gem_open(dev, priv); | |
286 | ||
3248877e DA |
287 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
288 | drm_prime_init_file_private(&priv->prime); | |
289 | ||
d985c108 DA |
290 | if (dev->driver->open) { |
291 | ret = dev->driver->open(dev, priv); | |
292 | if (ret < 0) | |
293 | goto out_free; | |
294 | } | |
295 | ||
7c1c2871 DA |
296 | |
297 | /* if there is no current master make this fd it */ | |
30e2fb18 | 298 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
299 | if (!priv->minor->master) { |
300 | /* create a new master */ | |
301 | priv->minor->master = drm_master_create(priv->minor); | |
302 | if (!priv->minor->master) { | |
dba5ed0c | 303 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 DA |
304 | ret = -ENOMEM; |
305 | goto out_free; | |
306 | } | |
307 | ||
308 | priv->is_master = 1; | |
309 | /* take another reference for the copy in the local file priv */ | |
310 | priv->master = drm_master_get(priv->minor->master); | |
311 | ||
312 | priv->authenticated = 1; | |
313 | ||
314 | mutex_unlock(&dev->struct_mutex); | |
315 | if (dev->driver->master_create) { | |
316 | ret = dev->driver->master_create(dev, priv->master); | |
317 | if (ret) { | |
318 | mutex_lock(&dev->struct_mutex); | |
319 | /* drop both references if this fails */ | |
320 | drm_master_put(&priv->minor->master); | |
321 | drm_master_put(&priv->master); | |
322 | mutex_unlock(&dev->struct_mutex); | |
323 | goto out_free; | |
324 | } | |
325 | } | |
862302ff TH |
326 | mutex_lock(&dev->struct_mutex); |
327 | if (dev->driver->master_set) { | |
328 | ret = dev->driver->master_set(dev, priv, true); | |
329 | if (ret) { | |
330 | /* drop both references if this fails */ | |
331 | drm_master_put(&priv->minor->master); | |
332 | drm_master_put(&priv->master); | |
333 | mutex_unlock(&dev->struct_mutex); | |
334 | goto out_free; | |
335 | } | |
336 | } | |
337 | mutex_unlock(&dev->struct_mutex); | |
7c1c2871 DA |
338 | } else { |
339 | /* get a reference to the master */ | |
340 | priv->master = drm_master_get(priv->minor->master); | |
341 | mutex_unlock(&dev->struct_mutex); | |
342 | } | |
bd1b331f | 343 | |
7c1c2871 | 344 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 345 | list_add(&priv->lhead, &dev->filelist); |
30e2fb18 | 346 | mutex_unlock(&dev->struct_mutex); |
d985c108 DA |
347 | |
348 | #ifdef __alpha__ | |
349 | /* | |
350 | * Default the hose | |
351 | */ | |
352 | if (!dev->hose) { | |
353 | struct pci_dev *pci_dev; | |
354 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); | |
355 | if (pci_dev) { | |
356 | dev->hose = pci_dev->sysdata; | |
357 | pci_dev_put(pci_dev); | |
358 | } | |
359 | if (!dev->hose) { | |
360 | struct pci_bus *b = pci_bus_b(pci_root_buses.next); | |
361 | if (b) | |
362 | dev->hose = b->sysdata; | |
363 | } | |
364 | } | |
365 | #endif | |
366 | ||
367 | return 0; | |
368 | out_free: | |
9a298b2a | 369 | kfree(priv); |
d985c108 DA |
370 | filp->private_data = NULL; |
371 | return ret; | |
372 | } | |
373 | ||
374 | /** No-op. */ | |
375 | int drm_fasync(int fd, struct file *filp, int on) | |
376 | { | |
84b1fd10 | 377 | struct drm_file *priv = filp->private_data; |
2c14f28b | 378 | struct drm_device *dev = priv->minor->dev; |
d985c108 DA |
379 | |
380 | DRM_DEBUG("fd = %d, device = 0x%lx\n", fd, | |
2c14f28b | 381 | (long)old_encode_dev(priv->minor->device)); |
60aa4924 | 382 | return fasync_helper(fd, filp, on, &dev->buf_async); |
d985c108 DA |
383 | } |
384 | EXPORT_SYMBOL(drm_fasync); | |
385 | ||
7c1c2871 DA |
386 | static void drm_master_release(struct drm_device *dev, struct file *filp) |
387 | { | |
388 | struct drm_file *file_priv = filp->private_data; | |
389 | ||
7c1c2871 DA |
390 | if (drm_i_have_hw_lock(dev, file_priv)) { |
391 | DRM_DEBUG("File %p released, freeing lock for context %d\n", | |
392 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
393 | drm_lock_free(&file_priv->master->lock, | |
394 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
395 | } | |
7c1c2871 DA |
396 | } |
397 | ||
c9a9c5e0 KH |
398 | static void drm_events_release(struct drm_file *file_priv) |
399 | { | |
400 | struct drm_device *dev = file_priv->minor->dev; | |
401 | struct drm_pending_event *e, *et; | |
402 | struct drm_pending_vblank_event *v, *vt; | |
403 | unsigned long flags; | |
404 | ||
405 | spin_lock_irqsave(&dev->event_lock, flags); | |
406 | ||
407 | /* Remove pending flips */ | |
408 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) | |
409 | if (v->base.file_priv == file_priv) { | |
410 | list_del(&v->base.link); | |
411 | drm_vblank_put(dev, v->pipe); | |
412 | v->base.destroy(&v->base); | |
413 | } | |
414 | ||
415 | /* Remove unconsumed events */ | |
416 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) | |
417 | e->destroy(e); | |
418 | ||
419 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
420 | } | |
421 | ||
1da177e4 LT |
422 | /** |
423 | * Release file. | |
424 | * | |
425 | * \param inode device inode | |
6c340eac | 426 | * \param file_priv DRM file private. |
1da177e4 LT |
427 | * \return zero on success or a negative number on failure. |
428 | * | |
429 | * If the hardware lock is held then free it, and take it again for the kernel | |
430 | * context since it's necessary to reclaim buffers. Unlink the file private | |
431 | * data from its list and free it. Decreases the open count and if it reaches | |
22eae947 | 432 | * zero calls drm_lastclose(). |
1da177e4 | 433 | */ |
b5e89ed5 | 434 | int drm_release(struct inode *inode, struct file *filp) |
1da177e4 | 435 | { |
6c340eac | 436 | struct drm_file *file_priv = filp->private_data; |
2c14f28b | 437 | struct drm_device *dev = file_priv->minor->dev; |
1da177e4 LT |
438 | int retcode = 0; |
439 | ||
58374713 | 440 | mutex_lock(&drm_global_mutex); |
1da177e4 | 441 | |
b5e89ed5 | 442 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
1da177e4 | 443 | |
22eae947 | 444 | if (dev->driver->preclose) |
6c340eac | 445 | dev->driver->preclose(dev, file_priv); |
1da177e4 LT |
446 | |
447 | /* ======================================================== | |
448 | * Begin inline drm_release | |
449 | */ | |
450 | ||
b5e89ed5 | 451 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
ba25f9dc | 452 | task_pid_nr(current), |
2c14f28b | 453 | (long)old_encode_dev(file_priv->minor->device), |
b5e89ed5 DA |
454 | dev->open_count); |
455 | ||
598781d7 TH |
456 | /* Release any auth tokens that might point to this file_priv, |
457 | (do that under the drm_global_mutex) */ | |
458 | if (file_priv->magic) | |
459 | (void) drm_remove_magic(file_priv->master, file_priv->magic); | |
460 | ||
7c1c2871 DA |
461 | /* if the master has gone away we can't do anything with the lock */ |
462 | if (file_priv->minor->master) | |
463 | drm_master_release(dev, filp); | |
1da177e4 | 464 | |
67cb4b4d DV |
465 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
466 | drm_core_reclaim_buffers(dev, file_priv); | |
467 | ||
c9a9c5e0 KH |
468 | drm_events_release(file_priv); |
469 | ||
ea39f835 KH |
470 | if (dev->driver->driver_features & DRIVER_MODESET) |
471 | drm_fb_release(file_priv); | |
472 | ||
4e47e02d P |
473 | if (dev->driver->driver_features & DRIVER_GEM) |
474 | drm_gem_release(dev, file_priv); | |
475 | ||
30e2fb18 | 476 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 477 | if (!list_empty(&dev->ctxlist)) { |
55910517 | 478 | struct drm_ctx_list *pos, *n; |
1da177e4 | 479 | |
bd1b331f | 480 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
6c340eac | 481 | if (pos->tag == file_priv && |
b5e89ed5 | 482 | pos->handle != DRM_KERNEL_CONTEXT) { |
1da177e4 | 483 | if (dev->driver->context_dtor) |
b5e89ed5 DA |
484 | dev->driver->context_dtor(dev, |
485 | pos->handle); | |
1da177e4 | 486 | |
b5e89ed5 | 487 | drm_ctxbitmap_free(dev, pos->handle); |
1da177e4 | 488 | |
b5e89ed5 | 489 | list_del(&pos->head); |
9a298b2a | 490 | kfree(pos); |
1da177e4 LT |
491 | --dev->ctx_count; |
492 | } | |
493 | } | |
494 | } | |
30e2fb18 | 495 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 | 496 | |
30e2fb18 | 497 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
498 | |
499 | if (file_priv->is_master) { | |
fda714c2 | 500 | struct drm_master *master = file_priv->master; |
84b1fd10 | 501 | struct drm_file *temp; |
7c1c2871 DA |
502 | list_for_each_entry(temp, &dev->filelist, lhead) { |
503 | if ((temp->master == file_priv->master) && | |
504 | (temp != file_priv)) | |
505 | temp->authenticated = 0; | |
506 | } | |
bd1b331f | 507 | |
fda714c2 TH |
508 | /** |
509 | * Since the master is disappearing, so is the | |
510 | * possibility to lock. | |
511 | */ | |
512 | ||
513 | if (master->lock.hw_lock) { | |
514 | if (dev->sigdata.lock == master->lock.hw_lock) | |
515 | dev->sigdata.lock = NULL; | |
516 | master->lock.hw_lock = NULL; | |
517 | master->lock.file_priv = NULL; | |
518 | wake_up_interruptible_all(&master->lock.lock_queue); | |
519 | } | |
520 | ||
7c1c2871 DA |
521 | if (file_priv->minor->master == file_priv->master) { |
522 | /* drop the reference held my the minor */ | |
862302ff TH |
523 | if (dev->driver->master_drop) |
524 | dev->driver->master_drop(dev, file_priv, true); | |
7c1c2871 DA |
525 | drm_master_put(&file_priv->minor->master); |
526 | } | |
1da177e4 | 527 | } |
7c1c2871 | 528 | |
949c4a34 IH |
529 | BUG_ON(dev->dev_mapping == NULL); |
530 | iput(container_of(dev->dev_mapping, struct inode, i_data)); | |
531 | ||
7c1c2871 DA |
532 | /* drop the reference held my the file priv */ |
533 | drm_master_put(&file_priv->master); | |
534 | file_priv->is_master = 0; | |
6c340eac | 535 | list_del(&file_priv->lhead); |
30e2fb18 | 536 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 537 | |
22eae947 | 538 | if (dev->driver->postclose) |
6c340eac | 539 | dev->driver->postclose(dev, file_priv); |
3248877e DA |
540 | |
541 | if (drm_core_check_feature(dev, DRIVER_PRIME)) | |
542 | drm_prime_destroy_file_private(&file_priv->prime); | |
543 | ||
5fce5e0b | 544 | put_pid(file_priv->pid); |
9a298b2a | 545 | kfree(file_priv); |
1da177e4 LT |
546 | |
547 | /* ======================================================== | |
548 | * End inline drm_release | |
549 | */ | |
550 | ||
b5e89ed5 | 551 | atomic_inc(&dev->counts[_DRM_STAT_CLOSES]); |
b5e89ed5 | 552 | if (!--dev->open_count) { |
7c1c2871 DA |
553 | if (atomic_read(&dev->ioctl_count)) { |
554 | DRM_ERROR("Device busy: %d\n", | |
555 | atomic_read(&dev->ioctl_count)); | |
58374713 | 556 | retcode = -EBUSY; |
1a72d65d CW |
557 | } else |
558 | retcode = drm_lastclose(dev); | |
2c07a21d DA |
559 | if (drm_device_is_unplugged(dev)) |
560 | drm_put_dev(dev); | |
1da177e4 | 561 | } |
58374713 | 562 | mutex_unlock(&drm_global_mutex); |
1da177e4 LT |
563 | |
564 | return retcode; | |
565 | } | |
566 | EXPORT_SYMBOL(drm_release); | |
567 | ||
c9a9c5e0 KH |
568 | static bool |
569 | drm_dequeue_event(struct drm_file *file_priv, | |
570 | size_t total, size_t max, struct drm_pending_event **out) | |
571 | { | |
572 | struct drm_device *dev = file_priv->minor->dev; | |
573 | struct drm_pending_event *e; | |
574 | unsigned long flags; | |
575 | bool ret = false; | |
576 | ||
577 | spin_lock_irqsave(&dev->event_lock, flags); | |
578 | ||
579 | *out = NULL; | |
580 | if (list_empty(&file_priv->event_list)) | |
581 | goto out; | |
582 | e = list_first_entry(&file_priv->event_list, | |
583 | struct drm_pending_event, link); | |
584 | if (e->event->length + total > max) | |
585 | goto out; | |
586 | ||
587 | file_priv->event_space += e->event->length; | |
588 | list_del(&e->link); | |
589 | *out = e; | |
590 | ret = true; | |
591 | ||
592 | out: | |
593 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
594 | return ret; | |
595 | } | |
596 | ||
597 | ssize_t drm_read(struct file *filp, char __user *buffer, | |
598 | size_t count, loff_t *offset) | |
599 | { | |
600 | struct drm_file *file_priv = filp->private_data; | |
601 | struct drm_pending_event *e; | |
602 | size_t total; | |
603 | ssize_t ret; | |
604 | ||
605 | ret = wait_event_interruptible(file_priv->event_wait, | |
606 | !list_empty(&file_priv->event_list)); | |
607 | if (ret < 0) | |
608 | return ret; | |
609 | ||
610 | total = 0; | |
611 | while (drm_dequeue_event(file_priv, total, count, &e)) { | |
612 | if (copy_to_user(buffer + total, | |
613 | e->event, e->event->length)) { | |
614 | total = -EFAULT; | |
615 | break; | |
616 | } | |
617 | ||
618 | total += e->event->length; | |
619 | e->destroy(e); | |
620 | } | |
621 | ||
622 | return total; | |
623 | } | |
624 | EXPORT_SYMBOL(drm_read); | |
625 | ||
1da177e4 LT |
626 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
627 | { | |
c9a9c5e0 KH |
628 | struct drm_file *file_priv = filp->private_data; |
629 | unsigned int mask = 0; | |
630 | ||
631 | poll_wait(filp, &file_priv->event_wait, wait); | |
632 | ||
633 | if (!list_empty(&file_priv->event_list)) | |
634 | mask |= POLLIN | POLLRDNORM; | |
635 | ||
636 | return mask; | |
1da177e4 | 637 | } |
b5e89ed5 | 638 | EXPORT_SYMBOL(drm_poll); |