blob: 09a3571c990889ab3d408512f11175fa17590924 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
Dave Airlieb5e89ed2005-09-25 14:28:13 +10002 * \file drm_fops.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * File operations for DRM
Dave Airlieb5e89ed2005-09-25 14:28:13 +10004 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * \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>
Jonathan Corbet70ffa162008-05-15 11:34:16 -060039#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Dave Airlieb5e89ed2005-09-25 14:28:13 +100041static int drm_open_helper(struct inode *inode, struct file *filp,
Dave Airlie84b1fd12007-07-11 15:53:27 +100042 struct drm_device * dev);
Dave Airliec94f7022005-07-07 21:03:38 +100043
Dave Airlie84b1fd12007-07-11 15:53:27 +100044static int drm_setup(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
46 int i;
47 int ret;
48
Dave Airlie22eae942005-11-10 22:16:34 +110049 if (dev->driver->firstopen) {
50 ret = dev->driver->firstopen(dev);
Dave Airlieb5e89ed2005-09-25 14:28:13 +100051 if (ret != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 return ret;
53 }
54
Dave Airlieb5e89ed2005-09-25 14:28:13 +100055 atomic_set(&dev->ioctl_count, 0);
56 atomic_set(&dev->vma_count, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Dave Airlief453ba02008-11-07 14:05:41 -080058 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
Dave Airlieb5e89ed2005-09-25 14:28:13 +100063 i = drm_dma_setup(dev);
64 if (i < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 return i;
66 }
67
Dave Airlie3d774612006-08-07 20:07:43 +100068 for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
Dave Airlieb5e89ed2005-09-25 14:28:13 +100069 atomic_set(&dev->counts[i], 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Dave Airlie11d9c2f2007-02-18 17:13:39 +110071 dev->sigdata.lock = NULL;
Dave Airlie7c1c2872008-11-28 14:22:24 +100072
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 dev->queue_count = 0;
74 dev->queue_reserved = 0;
75 dev->queue_slots = 0;
76 dev->queuelist = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 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;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100083 init_waitqueue_head(&dev->context_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 dev->if_version = 0;
85
86 dev->ctx_start = 0;
87 dev->lck_start = 0;
88
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 dev->buf_async = NULL;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100090 init_waitqueue_head(&dev->buf_readers);
91 init_waitqueue_head(&dev->buf_writers);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
Dave Airlieb5e89ed2005-09-25 14:28:13 +100093 DRM_DEBUG("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95 /*
96 * The kernel's context could be created here, but is now created
Dave Airlieb5e89ed2005-09-25 14:28:13 +100097 * in drm_dma_enqueue. This is more resource-efficient for
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 * 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103 return 0;
104}
105
106/**
107 * Open file.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000108 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 * \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 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000117int drm_open(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000119 struct drm_device *dev = NULL;
Dave Airlie2c14f282008-04-21 16:47:32 +1000120 int minor_id = iminor(inode);
121 struct drm_minor *minor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 int retcode = 0;
123
Dave Airlie2c14f282008-04-21 16:47:32 +1000124 minor = idr_find(&drm_minors_idr, minor_id);
125 if (!minor)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 return -ENODEV;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000127
Dave Airlie2c14f282008-04-21 16:47:32 +1000128 if (!(dev = minor->dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 return -ENODEV;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000130
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);
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800137 retcode = drm_setup(dev);
138 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000140 spin_unlock(&dev->count_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 }
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800142out:
143 mutex_lock(&dev->struct_mutex);
Dave Airlief453ba02008-11-07 14:05:41 -0800144 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 }
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800150 mutex_unlock(&dev->struct_mutex);
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 return retcode;
153}
154EXPORT_SYMBOL(drm_open);
155
156/**
Dave Airlied985c102006-01-02 21:32:48 +1100157 * 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 */
165int drm_stub_open(struct inode *inode, struct file *filp)
166{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000167 struct drm_device *dev = NULL;
Dave Airlie2c14f282008-04-21 16:47:32 +1000168 struct drm_minor *minor;
169 int minor_id = iminor(inode);
Dave Airlied985c102006-01-02 21:32:48 +1100170 int err = -ENODEV;
Arjan van de Ven99ac48f2006-03-28 01:56:41 -0800171 const struct file_operations *old_fops;
Dave Airlied985c102006-01-02 21:32:48 +1100172
173 DRM_DEBUG("\n");
174
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600175 /* BKL pushdown: note that nothing else serializes idr_find() */
176 lock_kernel();
Dave Airlie2c14f282008-04-21 16:47:32 +1000177 minor = idr_find(&drm_minors_idr, minor_id);
178 if (!minor)
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600179 goto out;
Dave Airlied985c102006-01-02 21:32:48 +1100180
Dave Airlie2c14f282008-04-21 16:47:32 +1000181 if (!(dev = minor->dev))
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600182 goto out;
Dave Airlied985c102006-01-02 21:32:48 +1100183
184 old_fops = filp->f_op;
185 filp->f_op = fops_get(&dev->driver->fops);
Laurent Pinchartf41ced82009-01-06 14:40:40 -0800186 if (filp->f_op == NULL) {
187 filp->f_op = old_fops;
188 goto out;
189 }
Dave Airlied985c102006-01-02 21:32:48 +1100190 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
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600196out:
197 unlock_kernel();
Dave Airlied985c102006-01-02 21:32:48 +1100198 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 */
206static 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 */
229static int drm_open_helper(struct inode *inode, struct file *filp,
Dave Airlie84b1fd12007-07-11 15:53:27 +1000230 struct drm_device * dev)
Dave Airlied985c102006-01-02 21:32:48 +1100231{
Dave Airlie2c14f282008-04-21 16:47:32 +1000232 int minor_id = iminor(inode);
Dave Airlie84b1fd12007-07-11 15:53:27 +1000233 struct drm_file *priv;
Dave Airlied985c102006-01-02 21:32:48 +1100234 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
Dave Airlie2c14f282008-04-21 16:47:32 +1000241 DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
Dave Airlied985c102006-01-02 21:32:48 +1100242
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;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000249 priv->filp = filp;
David Howells2df68b42008-09-02 11:03:14 +1000250 priv->uid = current_euid();
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -0700251 priv->pid = task_pid_nr(current);
Dave Airlie2c14f282008-04-21 16:47:32 +1000252 priv->minor = idr_find(&drm_minors_idr, minor_id);
Dave Airlied985c102006-01-02 21:32:48 +1100253 priv->ioctl_count = 0;
254 /* for compatibility root is always authenticated */
255 priv->authenticated = capable(CAP_SYS_ADMIN);
256 priv->lock_count = 0;
257
Dave Airliebd1b3312007-05-26 05:01:51 +1000258 INIT_LIST_HEAD(&priv->lhead);
Dave Airlief453ba02008-11-07 14:05:41 -0800259 INIT_LIST_HEAD(&priv->fbs);
Dave Airliebd1b3312007-05-26 05:01:51 +1000260
Eric Anholt673a3942008-07-30 12:06:12 -0700261 if (dev->driver->driver_features & DRIVER_GEM)
262 drm_gem_open(dev, priv);
263
Dave Airlied985c102006-01-02 21:32:48 +1100264 if (dev->driver->open) {
265 ret = dev->driver->open(dev, priv);
266 if (ret < 0)
267 goto out_free;
268 }
269
Dave Airliebd1b3312007-05-26 05:01:51 +1000270
Dave Airlie7c1c2872008-11-28 14:22:24 +1000271 /* if there is no current master make this fd it */
272 mutex_lock(&dev->struct_mutex);
273 if (!priv->minor->master) {
274 /* create a new master */
275 priv->minor->master = drm_master_create(priv->minor);
276 if (!priv->minor->master) {
Dan Carpenterdba5ed02009-03-27 13:34:28 +0300277 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000278 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 }
305
306 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000307 list_add(&priv->lhead, &dev->filelist);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100308 mutex_unlock(&dev->struct_mutex);
Dave Airlied985c102006-01-02 21:32:48 +1100309
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. */
337int drm_fasync(int fd, struct file *filp, int on)
338{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000339 struct drm_file *priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000340 struct drm_device *dev = priv->minor->dev;
Dave Airlied985c102006-01-02 21:32:48 +1100341
342 DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,
Dave Airlie2c14f282008-04-21 16:47:32 +1000343 (long)old_encode_dev(priv->minor->device));
Jonathan Corbet60aa4922009-02-01 14:52:56 -0700344 return fasync_helper(fd, filp, on, &dev->buf_async);
Dave Airlied985c102006-01-02 21:32:48 +1100345}
346EXPORT_SYMBOL(drm_fasync);
347
Dave Airlie7c1c2872008-11-28 14:22:24 +1000348/*
349 * Reclaim locked buffers; note that this may be a bad idea if the current
350 * context doesn't have the hw lock...
351 */
352static 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
387static 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
Dave Airlied985c102006-01-02 21:32:48 +1100416/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 * Release file.
418 *
419 * \param inode device inode
Eric Anholt6c340ea2007-08-25 20:23:09 +1000420 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 * \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
Dave Airlie22eae942005-11-10 22:16:34 +1100426 * zero calls drm_lastclose().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000428int drm_release(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429{
Eric Anholt6c340ea2007-08-25 20:23:09 +1000430 struct drm_file *file_priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000431 struct drm_device *dev = file_priv->minor->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 int retcode = 0;
433
434 lock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000436 DRM_DEBUG("open_count = %d\n", dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Dave Airlie22eae942005-11-10 22:16:34 +1100438 if (dev->driver->preclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000439 dev->driver->preclose(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
441 /* ========================================================
442 * Begin inline drm_release
443 */
444
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000445 DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -0700446 task_pid_nr(current),
Dave Airlie2c14f282008-04-21 16:47:32 +1000447 (long)old_encode_dev(file_priv->minor->device),
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000448 dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Dave Airlie7c1c2872008-11-28 14:22:24 +1000450 /* 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Eric Anholt673a3942008-07-30 12:06:12 -0700454 if (dev->driver->driver_features & DRIVER_GEM)
455 drm_gem_release(dev, file_priv);
456
Kristian Høgsbergea39f832009-02-12 14:37:56 -0500457 if (dev->driver->driver_features & DRIVER_MODESET)
458 drm_fb_release(file_priv);
459
Dave Airlie30e2fb12006-02-02 19:37:46 +1100460 mutex_lock(&dev->ctxlist_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000461 if (!list_empty(&dev->ctxlist)) {
Dave Airlie55910512007-07-11 16:53:40 +1000462 struct drm_ctx_list *pos, *n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Dave Airliebd1b3312007-05-26 05:01:51 +1000464 list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
Eric Anholt6c340ea2007-08-25 20:23:09 +1000465 if (pos->tag == file_priv &&
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000466 pos->handle != DRM_KERNEL_CONTEXT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 if (dev->driver->context_dtor)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000468 dev->driver->context_dtor(dev,
469 pos->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000471 drm_ctxbitmap_free(dev, pos->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000473 list_del(&pos->head);
474 drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 --dev->ctx_count;
476 }
477 }
478 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100479 mutex_unlock(&dev->ctxlist_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Dave Airlie30e2fb12006-02-02 19:37:46 +1100481 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000482
Dave Airlie7c1c2872008-11-28 14:22:24 +1000483 if (file_priv->is_master) {
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100484 struct drm_master *master = file_priv->master;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000485 struct drm_file *temp;
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 }
491
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100492 /**
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
Dave Airlie7c1c2872008-11-28 14:22:24 +1000505 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000510
511 /* drop the reference held my the file priv */
512 drm_master_put(&file_priv->master);
513 file_priv->is_master = 0;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000514 list_del(&file_priv->lhead);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100515 mutex_unlock(&dev->struct_mutex);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000516
Dave Airlie22eae942005-11-10 22:16:34 +1100517 if (dev->driver->postclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000518 dev->driver->postclose(dev, file_priv);
519 drm_free(file_priv, sizeof(*file_priv), DRM_MEM_FILES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
521 /* ========================================================
522 * End inline drm_release
523 */
524
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000525 atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
526 spin_lock(&dev->count_lock);
527 if (!--dev->open_count) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000528 if (atomic_read(&dev->ioctl_count)) {
529 DRM_ERROR("Device busy: %d\n",
530 atomic_read(&dev->ioctl_count));
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000531 spin_unlock(&dev->count_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 unlock_kernel();
533 return -EBUSY;
534 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000535 spin_unlock(&dev->count_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 unlock_kernel();
Dave Airlie22eae942005-11-10 22:16:34 +1100537 return drm_lastclose(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000539 spin_unlock(&dev->count_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 unlock_kernel();
542
543 return retcode;
544}
545EXPORT_SYMBOL(drm_release);
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547/** No-op. */
548unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
549{
550 return 0;
551}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000552EXPORT_SYMBOL(drm_poll);