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