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 | ||
37 | #include "drmP.h" | |
38 | #include <linux/poll.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 | 40 | |
58374713 AB |
41 | /* from BKL pushdown: note that nothing else serializes idr_find() */ |
42 | DEFINE_MUTEX(drm_global_mutex); | |
e3461a2b | 43 | EXPORT_SYMBOL(drm_global_mutex); |
58374713 | 44 | |
b5e89ed5 | 45 | static int drm_open_helper(struct inode *inode, struct file *filp, |
84b1fd10 | 46 | struct drm_device * dev); |
c94f7029 | 47 | |
84b1fd10 | 48 | static int drm_setup(struct drm_device * dev) |
1da177e4 LT |
49 | { |
50 | int i; | |
51 | int ret; | |
52 | ||
22eae947 DA |
53 | if (dev->driver->firstopen) { |
54 | ret = dev->driver->firstopen(dev); | |
b5e89ed5 | 55 | if (ret != 0) |
1da177e4 LT |
56 | return ret; |
57 | } | |
58 | ||
b5e89ed5 DA |
59 | atomic_set(&dev->ioctl_count, 0); |
60 | atomic_set(&dev->vma_count, 0); | |
1da177e4 | 61 | |
f453ba04 DA |
62 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && |
63 | !drm_core_check_feature(dev, DRIVER_MODESET)) { | |
64 | dev->buf_use = 0; | |
65 | atomic_set(&dev->buf_alloc, 0); | |
66 | ||
b5e89ed5 DA |
67 | i = drm_dma_setup(dev); |
68 | if (i < 0) | |
1da177e4 LT |
69 | return i; |
70 | } | |
71 | ||
3d77461e | 72 | for (i = 0; i < ARRAY_SIZE(dev->counts); i++) |
b5e89ed5 | 73 | atomic_set(&dev->counts[i], 0); |
1da177e4 | 74 | |
11d9c2fd | 75 | dev->sigdata.lock = NULL; |
7c1c2871 | 76 | |
1da177e4 LT |
77 | dev->queue_count = 0; |
78 | dev->queue_reserved = 0; | |
79 | dev->queue_slots = 0; | |
80 | dev->queuelist = NULL; | |
1da177e4 LT |
81 | dev->context_flag = 0; |
82 | dev->interrupt_flag = 0; | |
83 | dev->dma_flag = 0; | |
84 | dev->last_context = 0; | |
85 | dev->last_switch = 0; | |
86 | dev->last_checked = 0; | |
b5e89ed5 | 87 | init_waitqueue_head(&dev->context_wait); |
1da177e4 LT |
88 | dev->if_version = 0; |
89 | ||
90 | dev->ctx_start = 0; | |
91 | dev->lck_start = 0; | |
92 | ||
1da177e4 | 93 | dev->buf_async = NULL; |
b5e89ed5 DA |
94 | init_waitqueue_head(&dev->buf_readers); |
95 | init_waitqueue_head(&dev->buf_writers); | |
1da177e4 | 96 | |
b5e89ed5 | 97 | DRM_DEBUG("\n"); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * The kernel's context could be created here, but is now created | |
b5e89ed5 | 101 | * in drm_dma_enqueue. This is more resource-efficient for |
1da177e4 LT |
102 | * hardware that does not do DMA, but may mean that |
103 | * drm_select_queue fails between the time the interrupt is | |
104 | * initialized and the time the queues are initialized. | |
105 | */ | |
1da177e4 LT |
106 | |
107 | return 0; | |
108 | } | |
109 | ||
110 | /** | |
111 | * Open file. | |
b5e89ed5 | 112 | * |
1da177e4 LT |
113 | * \param inode device inode |
114 | * \param filp file pointer. | |
115 | * \return zero on success or a negative number on failure. | |
116 | * | |
117 | * Searches the DRM device with the same minor number, calls open_helper(), and | |
118 | * increments the device open count. If the open count was previous at zero, | |
119 | * i.e., it's the first that the device is open, then calls setup(). | |
120 | */ | |
b5e89ed5 | 121 | int drm_open(struct inode *inode, struct file *filp) |
1da177e4 | 122 | { |
84b1fd10 | 123 | struct drm_device *dev = NULL; |
2c14f28b DA |
124 | int minor_id = iminor(inode); |
125 | struct drm_minor *minor; | |
1da177e4 LT |
126 | int retcode = 0; |
127 | ||
2c14f28b DA |
128 | minor = idr_find(&drm_minors_idr, minor_id); |
129 | if (!minor) | |
1da177e4 | 130 | return -ENODEV; |
b5e89ed5 | 131 | |
2c14f28b | 132 | if (!(dev = minor->dev)) |
1da177e4 | 133 | return -ENODEV; |
b5e89ed5 DA |
134 | |
135 | retcode = drm_open_helper(inode, filp, dev); | |
136 | if (!retcode) { | |
137 | atomic_inc(&dev->counts[_DRM_STAT_OPENS]); | |
1a72d65d | 138 | if (!dev->open_count++) |
a2c0a97b | 139 | retcode = drm_setup(dev); |
1da177e4 | 140 | } |
da584058 CW |
141 | if (!retcode) { |
142 | mutex_lock(&dev->struct_mutex); | |
143 | if (minor->type == DRM_MINOR_LEGACY) { | |
144 | if (dev->dev_mapping == NULL) | |
145 | dev->dev_mapping = inode->i_mapping; | |
146 | else if (dev->dev_mapping != inode->i_mapping) | |
147 | retcode = -ENODEV; | |
148 | } | |
149 | mutex_unlock(&dev->struct_mutex); | |
f453ba04 | 150 | } |
a2c0a97b | 151 | |
1da177e4 LT |
152 | return retcode; |
153 | } | |
154 | EXPORT_SYMBOL(drm_open); | |
155 | ||
d985c108 DA |
156 | /** |
157 | * File \c open operation. | |
158 | * | |
159 | * \param inode device inode. | |
160 | * \param filp file pointer. | |
161 | * | |
162 | * Puts the dev->fops corresponding to the device minor number into | |
163 | * \p filp, call the \c open method, and restore the file operations. | |
164 | */ | |
165 | int drm_stub_open(struct inode *inode, struct file *filp) | |
166 | { | |
84b1fd10 | 167 | struct drm_device *dev = NULL; |
2c14f28b DA |
168 | struct drm_minor *minor; |
169 | int minor_id = iminor(inode); | |
d985c108 | 170 | int err = -ENODEV; |
99ac48f5 | 171 | const struct file_operations *old_fops; |
d985c108 DA |
172 | |
173 | DRM_DEBUG("\n"); | |
174 | ||
58374713 | 175 | mutex_lock(&drm_global_mutex); |
2c14f28b DA |
176 | minor = idr_find(&drm_minors_idr, minor_id); |
177 | if (!minor) | |
70ffa16e | 178 | goto out; |
d985c108 | 179 | |
2c14f28b | 180 | if (!(dev = minor->dev)) |
70ffa16e | 181 | goto out; |
d985c108 DA |
182 | |
183 | old_fops = filp->f_op; | |
184 | filp->f_op = fops_get(&dev->driver->fops); | |
f41ced8f LP |
185 | if (filp->f_op == NULL) { |
186 | filp->f_op = old_fops; | |
187 | goto out; | |
188 | } | |
d985c108 DA |
189 | if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { |
190 | fops_put(filp->f_op); | |
191 | filp->f_op = fops_get(old_fops); | |
192 | } | |
193 | fops_put(old_fops); | |
194 | ||
70ffa16e | 195 | out: |
58374713 | 196 | mutex_unlock(&drm_global_mutex); |
d985c108 DA |
197 | return err; |
198 | } | |
199 | ||
200 | /** | |
201 | * Check whether DRI will run on this CPU. | |
202 | * | |
203 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. | |
204 | */ | |
205 | static int drm_cpu_valid(void) | |
206 | { | |
207 | #if defined(__i386__) | |
208 | if (boot_cpu_data.x86 == 3) | |
209 | return 0; /* No cmpxchg on a 386 */ | |
210 | #endif | |
211 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
212 | return 0; /* No cmpxchg before v9 sparc. */ | |
213 | #endif | |
214 | return 1; | |
215 | } | |
216 | ||
217 | /** | |
218 | * Called whenever a process opens /dev/drm. | |
219 | * | |
220 | * \param inode device inode. | |
221 | * \param filp file pointer. | |
222 | * \param dev device. | |
223 | * \return zero on success or a negative number on failure. | |
224 | * | |
225 | * Creates and initializes a drm_file structure for the file private data in \p | |
226 | * filp and add it into the double linked list in \p dev. | |
227 | */ | |
228 | static int drm_open_helper(struct inode *inode, struct file *filp, | |
84b1fd10 | 229 | struct drm_device * dev) |
d985c108 | 230 | { |
2c14f28b | 231 | int minor_id = iminor(inode); |
84b1fd10 | 232 | struct drm_file *priv; |
d985c108 DA |
233 | int ret; |
234 | ||
235 | if (filp->f_flags & O_EXCL) | |
236 | return -EBUSY; /* No exclusive opens */ | |
237 | if (!drm_cpu_valid()) | |
238 | return -EINVAL; | |
239 | ||
2c14f28b | 240 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); |
d985c108 | 241 | |
6ebc22e6 | 242 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
d985c108 DA |
243 | if (!priv) |
244 | return -ENOMEM; | |
245 | ||
d985c108 | 246 | filp->private_data = priv; |
6c340eac | 247 | priv->filp = filp; |
2df68b43 | 248 | priv->uid = current_euid(); |
ba25f9dc | 249 | priv->pid = task_pid_nr(current); |
2c14f28b | 250 | priv->minor = idr_find(&drm_minors_idr, minor_id); |
d985c108 DA |
251 | priv->ioctl_count = 0; |
252 | /* for compatibility root is always authenticated */ | |
253 | priv->authenticated = capable(CAP_SYS_ADMIN); | |
254 | priv->lock_count = 0; | |
255 | ||
bd1b331f | 256 | INIT_LIST_HEAD(&priv->lhead); |
f453ba04 | 257 | INIT_LIST_HEAD(&priv->fbs); |
c9a9c5e0 KH |
258 | INIT_LIST_HEAD(&priv->event_list); |
259 | init_waitqueue_head(&priv->event_wait); | |
260 | priv->event_space = 4096; /* set aside 4k for event buffer */ | |
bd1b331f | 261 | |
673a394b EA |
262 | if (dev->driver->driver_features & DRIVER_GEM) |
263 | drm_gem_open(dev, priv); | |
264 | ||
d985c108 DA |
265 | if (dev->driver->open) { |
266 | ret = dev->driver->open(dev, priv); | |
267 | if (ret < 0) | |
268 | goto out_free; | |
269 | } | |
270 | ||
7c1c2871 DA |
271 | |
272 | /* if there is no current master make this fd it */ | |
30e2fb18 | 273 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
274 | if (!priv->minor->master) { |
275 | /* create a new master */ | |
276 | priv->minor->master = drm_master_create(priv->minor); | |
277 | if (!priv->minor->master) { | |
dba5ed0c | 278 | mutex_unlock(&dev->struct_mutex); |
7c1c2871 DA |
279 | ret = -ENOMEM; |
280 | goto out_free; | |
281 | } | |
282 | ||
283 | priv->is_master = 1; | |
284 | /* take another reference for the copy in the local file priv */ | |
285 | priv->master = drm_master_get(priv->minor->master); | |
286 | ||
287 | priv->authenticated = 1; | |
288 | ||
289 | mutex_unlock(&dev->struct_mutex); | |
290 | if (dev->driver->master_create) { | |
291 | ret = dev->driver->master_create(dev, priv->master); | |
292 | if (ret) { | |
293 | mutex_lock(&dev->struct_mutex); | |
294 | /* drop both references if this fails */ | |
295 | drm_master_put(&priv->minor->master); | |
296 | drm_master_put(&priv->master); | |
297 | mutex_unlock(&dev->struct_mutex); | |
298 | goto out_free; | |
299 | } | |
300 | } | |
862302ff TH |
301 | mutex_lock(&dev->struct_mutex); |
302 | if (dev->driver->master_set) { | |
303 | ret = dev->driver->master_set(dev, priv, true); | |
304 | if (ret) { | |
305 | /* drop both references if this fails */ | |
306 | drm_master_put(&priv->minor->master); | |
307 | drm_master_put(&priv->master); | |
308 | mutex_unlock(&dev->struct_mutex); | |
309 | goto out_free; | |
310 | } | |
311 | } | |
312 | mutex_unlock(&dev->struct_mutex); | |
7c1c2871 DA |
313 | } else { |
314 | /* get a reference to the master */ | |
315 | priv->master = drm_master_get(priv->minor->master); | |
316 | mutex_unlock(&dev->struct_mutex); | |
317 | } | |
bd1b331f | 318 | |
7c1c2871 | 319 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 320 | list_add(&priv->lhead, &dev->filelist); |
30e2fb18 | 321 | mutex_unlock(&dev->struct_mutex); |
d985c108 DA |
322 | |
323 | #ifdef __alpha__ | |
324 | /* | |
325 | * Default the hose | |
326 | */ | |
327 | if (!dev->hose) { | |
328 | struct pci_dev *pci_dev; | |
329 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); | |
330 | if (pci_dev) { | |
331 | dev->hose = pci_dev->sysdata; | |
332 | pci_dev_put(pci_dev); | |
333 | } | |
334 | if (!dev->hose) { | |
335 | struct pci_bus *b = pci_bus_b(pci_root_buses.next); | |
336 | if (b) | |
337 | dev->hose = b->sysdata; | |
338 | } | |
339 | } | |
340 | #endif | |
341 | ||
342 | return 0; | |
343 | out_free: | |
9a298b2a | 344 | kfree(priv); |
d985c108 DA |
345 | filp->private_data = NULL; |
346 | return ret; | |
347 | } | |
348 | ||
349 | /** No-op. */ | |
350 | int drm_fasync(int fd, struct file *filp, int on) | |
351 | { | |
84b1fd10 | 352 | struct drm_file *priv = filp->private_data; |
2c14f28b | 353 | struct drm_device *dev = priv->minor->dev; |
d985c108 DA |
354 | |
355 | DRM_DEBUG("fd = %d, device = 0x%lx\n", fd, | |
2c14f28b | 356 | (long)old_encode_dev(priv->minor->device)); |
60aa4924 | 357 | return fasync_helper(fd, filp, on, &dev->buf_async); |
d985c108 DA |
358 | } |
359 | EXPORT_SYMBOL(drm_fasync); | |
360 | ||
7c1c2871 DA |
361 | /* |
362 | * Reclaim locked buffers; note that this may be a bad idea if the current | |
363 | * context doesn't have the hw lock... | |
364 | */ | |
365 | static void drm_reclaim_locked_buffers(struct drm_device *dev, struct file *f) | |
366 | { | |
367 | struct drm_file *file_priv = f->private_data; | |
368 | ||
369 | if (drm_i_have_hw_lock(dev, file_priv)) { | |
370 | dev->driver->reclaim_buffers_locked(dev, file_priv); | |
371 | } else { | |
372 | unsigned long _end = jiffies + 3 * DRM_HZ; | |
373 | int locked = 0; | |
374 | ||
375 | drm_idlelock_take(&file_priv->master->lock); | |
376 | ||
377 | /* | |
378 | * Wait for a while. | |
379 | */ | |
380 | do { | |
381 | spin_lock_bh(&file_priv->master->lock.spinlock); | |
382 | locked = file_priv->master->lock.idle_has_lock; | |
383 | spin_unlock_bh(&file_priv->master->lock.spinlock); | |
384 | if (locked) | |
385 | break; | |
386 | schedule(); | |
387 | } while (!time_after_eq(jiffies, _end)); | |
388 | ||
389 | if (!locked) { | |
390 | DRM_ERROR("reclaim_buffers_locked() deadlock. Please rework this\n" | |
391 | "\tdriver to use reclaim_buffers_idlelocked() instead.\n" | |
392 | "\tI will go on reclaiming the buffers anyway.\n"); | |
393 | } | |
394 | ||
395 | dev->driver->reclaim_buffers_locked(dev, file_priv); | |
396 | drm_idlelock_release(&file_priv->master->lock); | |
397 | } | |
398 | } | |
399 | ||
400 | static void drm_master_release(struct drm_device *dev, struct file *filp) | |
401 | { | |
402 | struct drm_file *file_priv = filp->private_data; | |
403 | ||
404 | if (dev->driver->reclaim_buffers_locked && | |
405 | file_priv->master->lock.hw_lock) | |
406 | drm_reclaim_locked_buffers(dev, filp); | |
407 | ||
408 | if (dev->driver->reclaim_buffers_idlelocked && | |
409 | file_priv->master->lock.hw_lock) { | |
410 | drm_idlelock_take(&file_priv->master->lock); | |
411 | dev->driver->reclaim_buffers_idlelocked(dev, file_priv); | |
412 | drm_idlelock_release(&file_priv->master->lock); | |
413 | } | |
414 | ||
415 | ||
416 | if (drm_i_have_hw_lock(dev, file_priv)) { | |
417 | DRM_DEBUG("File %p released, freeing lock for context %d\n", | |
418 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
419 | drm_lock_free(&file_priv->master->lock, | |
420 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); | |
421 | } | |
422 | ||
423 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && | |
424 | !dev->driver->reclaim_buffers_locked) { | |
425 | dev->driver->reclaim_buffers(dev, file_priv); | |
426 | } | |
427 | } | |
428 | ||
c9a9c5e0 KH |
429 | static void drm_events_release(struct drm_file *file_priv) |
430 | { | |
431 | struct drm_device *dev = file_priv->minor->dev; | |
432 | struct drm_pending_event *e, *et; | |
433 | struct drm_pending_vblank_event *v, *vt; | |
434 | unsigned long flags; | |
435 | ||
436 | spin_lock_irqsave(&dev->event_lock, flags); | |
437 | ||
438 | /* Remove pending flips */ | |
439 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) | |
440 | if (v->base.file_priv == file_priv) { | |
441 | list_del(&v->base.link); | |
442 | drm_vblank_put(dev, v->pipe); | |
443 | v->base.destroy(&v->base); | |
444 | } | |
445 | ||
446 | /* Remove unconsumed events */ | |
447 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) | |
448 | e->destroy(e); | |
449 | ||
450 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
451 | } | |
452 | ||
1da177e4 LT |
453 | /** |
454 | * Release file. | |
455 | * | |
456 | * \param inode device inode | |
6c340eac | 457 | * \param file_priv DRM file private. |
1da177e4 LT |
458 | * \return zero on success or a negative number on failure. |
459 | * | |
460 | * If the hardware lock is held then free it, and take it again for the kernel | |
461 | * context since it's necessary to reclaim buffers. Unlink the file private | |
462 | * data from its list and free it. Decreases the open count and if it reaches | |
22eae947 | 463 | * zero calls drm_lastclose(). |
1da177e4 | 464 | */ |
b5e89ed5 | 465 | int drm_release(struct inode *inode, struct file *filp) |
1da177e4 | 466 | { |
6c340eac | 467 | struct drm_file *file_priv = filp->private_data; |
2c14f28b | 468 | struct drm_device *dev = file_priv->minor->dev; |
1da177e4 LT |
469 | int retcode = 0; |
470 | ||
58374713 | 471 | mutex_lock(&drm_global_mutex); |
1da177e4 | 472 | |
b5e89ed5 | 473 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
1da177e4 | 474 | |
22eae947 | 475 | if (dev->driver->preclose) |
6c340eac | 476 | dev->driver->preclose(dev, file_priv); |
1da177e4 LT |
477 | |
478 | /* ======================================================== | |
479 | * Begin inline drm_release | |
480 | */ | |
481 | ||
b5e89ed5 | 482 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
ba25f9dc | 483 | task_pid_nr(current), |
2c14f28b | 484 | (long)old_encode_dev(file_priv->minor->device), |
b5e89ed5 DA |
485 | dev->open_count); |
486 | ||
7c1c2871 DA |
487 | /* if the master has gone away we can't do anything with the lock */ |
488 | if (file_priv->minor->master) | |
489 | drm_master_release(dev, filp); | |
1da177e4 | 490 | |
c9a9c5e0 KH |
491 | drm_events_release(file_priv); |
492 | ||
673a394b EA |
493 | if (dev->driver->driver_features & DRIVER_GEM) |
494 | drm_gem_release(dev, file_priv); | |
495 | ||
ea39f835 KH |
496 | if (dev->driver->driver_features & DRIVER_MODESET) |
497 | drm_fb_release(file_priv); | |
498 | ||
30e2fb18 | 499 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 500 | if (!list_empty(&dev->ctxlist)) { |
55910517 | 501 | struct drm_ctx_list *pos, *n; |
1da177e4 | 502 | |
bd1b331f | 503 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
6c340eac | 504 | if (pos->tag == file_priv && |
b5e89ed5 | 505 | pos->handle != DRM_KERNEL_CONTEXT) { |
1da177e4 | 506 | if (dev->driver->context_dtor) |
b5e89ed5 DA |
507 | dev->driver->context_dtor(dev, |
508 | pos->handle); | |
1da177e4 | 509 | |
b5e89ed5 | 510 | drm_ctxbitmap_free(dev, pos->handle); |
1da177e4 | 511 | |
b5e89ed5 | 512 | list_del(&pos->head); |
9a298b2a | 513 | kfree(pos); |
1da177e4 LT |
514 | --dev->ctx_count; |
515 | } | |
516 | } | |
517 | } | |
30e2fb18 | 518 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 | 519 | |
30e2fb18 | 520 | mutex_lock(&dev->struct_mutex); |
7c1c2871 DA |
521 | |
522 | if (file_priv->is_master) { | |
fda714c2 | 523 | struct drm_master *master = file_priv->master; |
84b1fd10 | 524 | struct drm_file *temp; |
7c1c2871 DA |
525 | list_for_each_entry(temp, &dev->filelist, lhead) { |
526 | if ((temp->master == file_priv->master) && | |
527 | (temp != file_priv)) | |
528 | temp->authenticated = 0; | |
529 | } | |
bd1b331f | 530 | |
fda714c2 TH |
531 | /** |
532 | * Since the master is disappearing, so is the | |
533 | * possibility to lock. | |
534 | */ | |
535 | ||
536 | if (master->lock.hw_lock) { | |
537 | if (dev->sigdata.lock == master->lock.hw_lock) | |
538 | dev->sigdata.lock = NULL; | |
539 | master->lock.hw_lock = NULL; | |
540 | master->lock.file_priv = NULL; | |
541 | wake_up_interruptible_all(&master->lock.lock_queue); | |
542 | } | |
543 | ||
7c1c2871 DA |
544 | if (file_priv->minor->master == file_priv->master) { |
545 | /* drop the reference held my the minor */ | |
862302ff TH |
546 | if (dev->driver->master_drop) |
547 | dev->driver->master_drop(dev, file_priv, true); | |
7c1c2871 DA |
548 | drm_master_put(&file_priv->minor->master); |
549 | } | |
1da177e4 | 550 | } |
7c1c2871 DA |
551 | |
552 | /* drop the reference held my the file priv */ | |
553 | drm_master_put(&file_priv->master); | |
554 | file_priv->is_master = 0; | |
6c340eac | 555 | list_del(&file_priv->lhead); |
30e2fb18 | 556 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 557 | |
22eae947 | 558 | if (dev->driver->postclose) |
6c340eac | 559 | dev->driver->postclose(dev, file_priv); |
9a298b2a | 560 | kfree(file_priv); |
1da177e4 LT |
561 | |
562 | /* ======================================================== | |
563 | * End inline drm_release | |
564 | */ | |
565 | ||
b5e89ed5 | 566 | atomic_inc(&dev->counts[_DRM_STAT_CLOSES]); |
b5e89ed5 | 567 | if (!--dev->open_count) { |
7c1c2871 DA |
568 | if (atomic_read(&dev->ioctl_count)) { |
569 | DRM_ERROR("Device busy: %d\n", | |
570 | atomic_read(&dev->ioctl_count)); | |
58374713 | 571 | retcode = -EBUSY; |
1a72d65d CW |
572 | } else |
573 | retcode = drm_lastclose(dev); | |
1da177e4 | 574 | } |
58374713 | 575 | mutex_unlock(&drm_global_mutex); |
1da177e4 LT |
576 | |
577 | return retcode; | |
578 | } | |
579 | EXPORT_SYMBOL(drm_release); | |
580 | ||
c9a9c5e0 KH |
581 | static bool |
582 | drm_dequeue_event(struct drm_file *file_priv, | |
583 | size_t total, size_t max, struct drm_pending_event **out) | |
584 | { | |
585 | struct drm_device *dev = file_priv->minor->dev; | |
586 | struct drm_pending_event *e; | |
587 | unsigned long flags; | |
588 | bool ret = false; | |
589 | ||
590 | spin_lock_irqsave(&dev->event_lock, flags); | |
591 | ||
592 | *out = NULL; | |
593 | if (list_empty(&file_priv->event_list)) | |
594 | goto out; | |
595 | e = list_first_entry(&file_priv->event_list, | |
596 | struct drm_pending_event, link); | |
597 | if (e->event->length + total > max) | |
598 | goto out; | |
599 | ||
600 | file_priv->event_space += e->event->length; | |
601 | list_del(&e->link); | |
602 | *out = e; | |
603 | ret = true; | |
604 | ||
605 | out: | |
606 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
607 | return ret; | |
608 | } | |
609 | ||
610 | ssize_t drm_read(struct file *filp, char __user *buffer, | |
611 | size_t count, loff_t *offset) | |
612 | { | |
613 | struct drm_file *file_priv = filp->private_data; | |
614 | struct drm_pending_event *e; | |
615 | size_t total; | |
616 | ssize_t ret; | |
617 | ||
618 | ret = wait_event_interruptible(file_priv->event_wait, | |
619 | !list_empty(&file_priv->event_list)); | |
620 | if (ret < 0) | |
621 | return ret; | |
622 | ||
623 | total = 0; | |
624 | while (drm_dequeue_event(file_priv, total, count, &e)) { | |
625 | if (copy_to_user(buffer + total, | |
626 | e->event, e->event->length)) { | |
627 | total = -EFAULT; | |
628 | break; | |
629 | } | |
630 | ||
631 | total += e->event->length; | |
632 | e->destroy(e); | |
633 | } | |
634 | ||
635 | return total; | |
636 | } | |
637 | EXPORT_SYMBOL(drm_read); | |
638 | ||
1da177e4 LT |
639 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
640 | { | |
c9a9c5e0 KH |
641 | struct drm_file *file_priv = filp->private_data; |
642 | unsigned int mask = 0; | |
643 | ||
644 | poll_wait(filp, &file_priv->event_wait, wait); | |
645 | ||
646 | if (!list_empty(&file_priv->event_list)) | |
647 | mask |= POLLIN | POLLRDNORM; | |
648 | ||
649 | return mask; | |
1da177e4 | 650 | } |
b5e89ed5 | 651 | EXPORT_SYMBOL(drm_poll); |