blob: 7ef1b673e1be9ec2f82006ca3d8ea2519e13b231 [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
David Howells760285e2012-10-02 18:01:07 +010037#include <drm/drmP.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/poll.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Paul Gortmakere0cd3602011-08-30 11:04:30 -040040#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Arnd Bergmann58374712010-07-10 23:51:39 +020042/* from BKL pushdown: note that nothing else serializes idr_find() */
43DEFINE_MUTEX(drm_global_mutex);
Ben Skeggse3461a22010-08-26 14:58:57 +100044EXPORT_SYMBOL(drm_global_mutex);
Arnd Bergmann58374712010-07-10 23:51:39 +020045
Dave Airlieb5e89ed2005-09-25 14:28:13 +100046static int drm_open_helper(struct inode *inode, struct file *filp,
Dave Airlie84b1fd12007-07-11 15:53:27 +100047 struct drm_device * dev);
Dave Airliec94f7022005-07-07 21:03:38 +100048
Dave Airlie84b1fd12007-07-11 15:53:27 +100049static int drm_setup(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070050{
51 int i;
52 int ret;
53
Dave Airlie22eae942005-11-10 22:16:34 +110054 if (dev->driver->firstopen) {
55 ret = dev->driver->firstopen(dev);
Dave Airlieb5e89ed2005-09-25 14:28:13 +100056 if (ret != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 return ret;
58 }
59
Dave Airlieb5e89ed2005-09-25 14:28:13 +100060 atomic_set(&dev->ioctl_count, 0);
61 atomic_set(&dev->vma_count, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Dave Airlief453ba02008-11-07 14:05:41 -080063 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
Dave Airlieb5e89ed2005-09-25 14:28:13 +100068 i = drm_dma_setup(dev);
69 if (i < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 return i;
71 }
72
Dave Airlie3d774612006-08-07 20:07:43 +100073 for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
Dave Airlieb5e89ed2005-09-25 14:28:13 +100074 atomic_set(&dev->counts[i], 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Dave Airlie11d9c2f2007-02-18 17:13:39 +110076 dev->sigdata.lock = NULL;
Dave Airlie7c1c2872008-11-28 14:22:24 +100077
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 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;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100084 init_waitqueue_head(&dev->context_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 dev->if_version = 0;
86
87 dev->ctx_start = 0;
88 dev->lck_start = 0;
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 dev->buf_async = NULL;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100091 init_waitqueue_head(&dev->buf_readers);
92 init_waitqueue_head(&dev->buf_writers);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Dave Airlieb5e89ed2005-09-25 14:28:13 +100094 DRM_DEBUG("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96 /*
97 * The kernel's context could be created here, but is now created
Dave Airlieb5e89ed2005-09-25 14:28:13 +100098 * in drm_dma_enqueue. This is more resource-efficient for
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 * 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 return 0;
105}
106
107/**
108 * Open file.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000109 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 * \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 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000118int drm_open(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000120 struct drm_device *dev = NULL;
Dave Airlie2c14f282008-04-21 16:47:32 +1000121 int minor_id = iminor(inode);
122 struct drm_minor *minor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 int retcode = 0;
124
Dave Airlie2c14f282008-04-21 16:47:32 +1000125 minor = idr_find(&drm_minors_idr, minor_id);
126 if (!minor)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 return -ENODEV;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000128
Dave Airlie2c14f282008-04-21 16:47:32 +1000129 if (!(dev = minor->dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 return -ENODEV;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000131
Dave Airlie2c07a212012-02-20 14:18:07 +0000132 if (drm_device_is_unplugged(dev))
133 return -ENODEV;
134
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000135 retcode = drm_open_helper(inode, filp, dev);
136 if (!retcode) {
137 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
Chris Wilson1a72d652010-08-11 14:41:16 +0100138 if (!dev->open_count++)
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800139 retcode = drm_setup(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 }
Chris Wilsonda584052010-03-18 11:56:54 +0000141 if (!retcode) {
142 mutex_lock(&dev->struct_mutex);
Ilija Hadzic949c4a32012-05-15 16:40:10 -0400143 if (dev->dev_mapping == NULL)
144 dev->dev_mapping = &inode->i_data;
145 /* ihold ensures nobody can remove inode with our i_data */
146 ihold(container_of(dev->dev_mapping, struct inode, i_data));
147 inode->i_mapping = dev->dev_mapping;
148 filp->f_mapping = dev->dev_mapping;
Chris Wilsonda584052010-03-18 11:56:54 +0000149 mutex_unlock(&dev->struct_mutex);
Dave Airlief453ba02008-11-07 14:05:41 -0800150 }
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800151
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
Arnd Bergmann58374712010-07-10 23:51:39 +0200175 mutex_lock(&drm_global_mutex);
Dave Airlie2c14f282008-04-21 16:47:32 +1000176 minor = idr_find(&drm_minors_idr, minor_id);
177 if (!minor)
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600178 goto out;
Dave Airlied985c102006-01-02 21:32:48 +1100179
Dave Airlie2c14f282008-04-21 16:47:32 +1000180 if (!(dev = minor->dev))
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600181 goto out;
Dave Airlied985c102006-01-02 21:32:48 +1100182
Dave Airlie2c07a212012-02-20 14:18:07 +0000183 if (drm_device_is_unplugged(dev))
184 goto out;
185
Dave Airlied985c102006-01-02 21:32:48 +1100186 old_fops = filp->f_op;
Arjan van de Vene08e96d2011-10-31 07:28:57 -0700187 filp->f_op = fops_get(dev->driver->fops);
Laurent Pinchartf41ced82009-01-06 14:40:40 -0800188 if (filp->f_op == NULL) {
189 filp->f_op = old_fops;
190 goto out;
191 }
Dave Airlied985c102006-01-02 21:32:48 +1100192 if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
193 fops_put(filp->f_op);
194 filp->f_op = fops_get(old_fops);
195 }
196 fops_put(old_fops);
197
Jonathan Corbet70ffa162008-05-15 11:34:16 -0600198out:
Arnd Bergmann58374712010-07-10 23:51:39 +0200199 mutex_unlock(&drm_global_mutex);
Dave Airlied985c102006-01-02 21:32:48 +1100200 return err;
201}
202
203/**
204 * Check whether DRI will run on this CPU.
205 *
206 * \return non-zero if the DRI will run on this CPU, or zero otherwise.
207 */
208static int drm_cpu_valid(void)
209{
210#if defined(__i386__)
211 if (boot_cpu_data.x86 == 3)
212 return 0; /* No cmpxchg on a 386 */
213#endif
214#if defined(__sparc__) && !defined(__sparc_v9__)
215 return 0; /* No cmpxchg before v9 sparc. */
216#endif
217 return 1;
218}
219
220/**
221 * Called whenever a process opens /dev/drm.
222 *
223 * \param inode device inode.
224 * \param filp file pointer.
225 * \param dev device.
226 * \return zero on success or a negative number on failure.
227 *
228 * Creates and initializes a drm_file structure for the file private data in \p
229 * filp and add it into the double linked list in \p dev.
230 */
231static int drm_open_helper(struct inode *inode, struct file *filp,
Dave Airlie84b1fd12007-07-11 15:53:27 +1000232 struct drm_device * dev)
Dave Airlied985c102006-01-02 21:32:48 +1100233{
Dave Airlie2c14f282008-04-21 16:47:32 +1000234 int minor_id = iminor(inode);
Dave Airlie84b1fd12007-07-11 15:53:27 +1000235 struct drm_file *priv;
Dave Airlied985c102006-01-02 21:32:48 +1100236 int ret;
237
238 if (filp->f_flags & O_EXCL)
239 return -EBUSY; /* No exclusive opens */
240 if (!drm_cpu_valid())
241 return -EINVAL;
Dave Airlie5bcf7192010-12-07 09:20:40 +1000242 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
243 return -EINVAL;
Dave Airlied985c102006-01-02 21:32:48 +1100244
Dave Airlie2c14f282008-04-21 16:47:32 +1000245 DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
Dave Airlied985c102006-01-02 21:32:48 +1100246
Julia Lawall6ebc22e2010-05-13 21:58:56 +0200247 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
Dave Airlied985c102006-01-02 21:32:48 +1100248 if (!priv)
249 return -ENOMEM;
250
Dave Airlied985c102006-01-02 21:32:48 +1100251 filp->private_data = priv;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000252 priv->filp = filp;
David Howells2df68b42008-09-02 11:03:14 +1000253 priv->uid = current_euid();
Eric W. Biederman5fce5e02012-02-07 16:47:26 -0800254 priv->pid = get_pid(task_pid(current));
Dave Airlie2c14f282008-04-21 16:47:32 +1000255 priv->minor = idr_find(&drm_minors_idr, minor_id);
Dave Airlied985c102006-01-02 21:32:48 +1100256 priv->ioctl_count = 0;
257 /* for compatibility root is always authenticated */
258 priv->authenticated = capable(CAP_SYS_ADMIN);
259 priv->lock_count = 0;
260
Dave Airliebd1b3312007-05-26 05:01:51 +1000261 INIT_LIST_HEAD(&priv->lhead);
Dave Airlief453ba02008-11-07 14:05:41 -0800262 INIT_LIST_HEAD(&priv->fbs);
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000263 INIT_LIST_HEAD(&priv->event_list);
264 init_waitqueue_head(&priv->event_wait);
265 priv->event_space = 4096; /* set aside 4k for event buffer */
Dave Airliebd1b3312007-05-26 05:01:51 +1000266
Eric Anholt673a3942008-07-30 12:06:12 -0700267 if (dev->driver->driver_features & DRIVER_GEM)
268 drm_gem_open(dev, priv);
269
Dave Airlie32488772011-11-25 15:21:02 +0000270 if (drm_core_check_feature(dev, DRIVER_PRIME))
271 drm_prime_init_file_private(&priv->prime);
272
Dave Airlied985c102006-01-02 21:32:48 +1100273 if (dev->driver->open) {
274 ret = dev->driver->open(dev, priv);
275 if (ret < 0)
276 goto out_free;
277 }
278
Dave Airliebd1b3312007-05-26 05:01:51 +1000279
Dave Airlie7c1c2872008-11-28 14:22:24 +1000280 /* if there is no current master make this fd it */
281 mutex_lock(&dev->struct_mutex);
282 if (!priv->minor->master) {
283 /* create a new master */
284 priv->minor->master = drm_master_create(priv->minor);
285 if (!priv->minor->master) {
Dan Carpenterdba5ed02009-03-27 13:34:28 +0300286 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000287 ret = -ENOMEM;
288 goto out_free;
289 }
290
291 priv->is_master = 1;
292 /* take another reference for the copy in the local file priv */
293 priv->master = drm_master_get(priv->minor->master);
294
295 priv->authenticated = 1;
296
297 mutex_unlock(&dev->struct_mutex);
298 if (dev->driver->master_create) {
299 ret = dev->driver->master_create(dev, priv->master);
300 if (ret) {
301 mutex_lock(&dev->struct_mutex);
302 /* drop both references if this fails */
303 drm_master_put(&priv->minor->master);
304 drm_master_put(&priv->master);
305 mutex_unlock(&dev->struct_mutex);
306 goto out_free;
307 }
308 }
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000309 mutex_lock(&dev->struct_mutex);
310 if (dev->driver->master_set) {
311 ret = dev->driver->master_set(dev, priv, true);
312 if (ret) {
313 /* drop both references if this fails */
314 drm_master_put(&priv->minor->master);
315 drm_master_put(&priv->master);
316 mutex_unlock(&dev->struct_mutex);
317 goto out_free;
318 }
319 }
320 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000321 } else {
322 /* get a reference to the master */
323 priv->master = drm_master_get(priv->minor->master);
324 mutex_unlock(&dev->struct_mutex);
325 }
326
327 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000328 list_add(&priv->lhead, &dev->filelist);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100329 mutex_unlock(&dev->struct_mutex);
Dave Airlied985c102006-01-02 21:32:48 +1100330
331#ifdef __alpha__
332 /*
333 * Default the hose
334 */
335 if (!dev->hose) {
336 struct pci_dev *pci_dev;
337 pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
338 if (pci_dev) {
339 dev->hose = pci_dev->sysdata;
340 pci_dev_put(pci_dev);
341 }
342 if (!dev->hose) {
343 struct pci_bus *b = pci_bus_b(pci_root_buses.next);
344 if (b)
345 dev->hose = b->sysdata;
346 }
347 }
348#endif
349
350 return 0;
351 out_free:
Eric Anholt9a298b22009-03-24 12:23:04 -0700352 kfree(priv);
Dave Airlied985c102006-01-02 21:32:48 +1100353 filp->private_data = NULL;
354 return ret;
355}
356
357/** No-op. */
358int drm_fasync(int fd, struct file *filp, int on)
359{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000360 struct drm_file *priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000361 struct drm_device *dev = priv->minor->dev;
Dave Airlied985c102006-01-02 21:32:48 +1100362
363 DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,
Dave Airlie2c14f282008-04-21 16:47:32 +1000364 (long)old_encode_dev(priv->minor->device));
Jonathan Corbet60aa4922009-02-01 14:52:56 -0700365 return fasync_helper(fd, filp, on, &dev->buf_async);
Dave Airlied985c102006-01-02 21:32:48 +1100366}
367EXPORT_SYMBOL(drm_fasync);
368
Dave Airlie7c1c2872008-11-28 14:22:24 +1000369static void drm_master_release(struct drm_device *dev, struct file *filp)
370{
371 struct drm_file *file_priv = filp->private_data;
372
Dave Airlie7c1c2872008-11-28 14:22:24 +1000373 if (drm_i_have_hw_lock(dev, file_priv)) {
374 DRM_DEBUG("File %p released, freeing lock for context %d\n",
375 filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
376 drm_lock_free(&file_priv->master->lock,
377 _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
378 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000379}
380
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000381static void drm_events_release(struct drm_file *file_priv)
382{
383 struct drm_device *dev = file_priv->minor->dev;
384 struct drm_pending_event *e, *et;
385 struct drm_pending_vblank_event *v, *vt;
386 unsigned long flags;
387
388 spin_lock_irqsave(&dev->event_lock, flags);
389
390 /* Remove pending flips */
391 list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link)
392 if (v->base.file_priv == file_priv) {
393 list_del(&v->base.link);
394 drm_vblank_put(dev, v->pipe);
395 v->base.destroy(&v->base);
396 }
397
398 /* Remove unconsumed events */
399 list_for_each_entry_safe(e, et, &file_priv->event_list, link)
400 e->destroy(e);
401
402 spin_unlock_irqrestore(&dev->event_lock, flags);
403}
404
Dave Airlied985c102006-01-02 21:32:48 +1100405/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 * Release file.
407 *
408 * \param inode device inode
Eric Anholt6c340ea2007-08-25 20:23:09 +1000409 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 * \return zero on success or a negative number on failure.
411 *
412 * If the hardware lock is held then free it, and take it again for the kernel
413 * context since it's necessary to reclaim buffers. Unlink the file private
414 * data from its list and free it. Decreases the open count and if it reaches
Dave Airlie22eae942005-11-10 22:16:34 +1100415 * zero calls drm_lastclose().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000417int drm_release(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418{
Eric Anholt6c340ea2007-08-25 20:23:09 +1000419 struct drm_file *file_priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000420 struct drm_device *dev = file_priv->minor->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 int retcode = 0;
422
Arnd Bergmann58374712010-07-10 23:51:39 +0200423 mutex_lock(&drm_global_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000425 DRM_DEBUG("open_count = %d\n", dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Dave Airlie22eae942005-11-10 22:16:34 +1100427 if (dev->driver->preclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000428 dev->driver->preclose(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 /* ========================================================
431 * Begin inline drm_release
432 */
433
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000434 DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -0700435 task_pid_nr(current),
Dave Airlie2c14f282008-04-21 16:47:32 +1000436 (long)old_encode_dev(file_priv->minor->device),
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000437 dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Thomas Hellstrom598781d2012-01-24 18:54:21 +0100439 /* Release any auth tokens that might point to this file_priv,
440 (do that under the drm_global_mutex) */
441 if (file_priv->magic)
442 (void) drm_remove_magic(file_priv->master, file_priv->magic);
443
Dave Airlie7c1c2872008-11-28 14:22:24 +1000444 /* if the master has gone away we can't do anything with the lock */
445 if (file_priv->minor->master)
446 drm_master_release(dev, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Daniel Vetter67cb4b42011-10-26 00:31:26 +0200448 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
449 drm_core_reclaim_buffers(dev, file_priv);
450
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000451 drm_events_release(file_priv);
452
Kristian Høgsbergea39f832009-02-12 14:37:56 -0500453 if (dev->driver->driver_features & DRIVER_MODESET)
454 drm_fb_release(file_priv);
455
Prathyush4e47e022012-04-14 17:22:13 +0530456 if (dev->driver->driver_features & DRIVER_GEM)
457 drm_gem_release(dev, file_priv);
458
Dave Airlie30e2fb12006-02-02 19:37:46 +1100459 mutex_lock(&dev->ctxlist_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000460 if (!list_empty(&dev->ctxlist)) {
Dave Airlie55910512007-07-11 16:53:40 +1000461 struct drm_ctx_list *pos, *n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
Dave Airliebd1b3312007-05-26 05:01:51 +1000463 list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
Eric Anholt6c340ea2007-08-25 20:23:09 +1000464 if (pos->tag == file_priv &&
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000465 pos->handle != DRM_KERNEL_CONTEXT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 if (dev->driver->context_dtor)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000467 dev->driver->context_dtor(dev,
468 pos->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000470 drm_ctxbitmap_free(dev, pos->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000472 list_del(&pos->head);
Eric Anholt9a298b22009-03-24 12:23:04 -0700473 kfree(pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 --dev->ctx_count;
475 }
476 }
477 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100478 mutex_unlock(&dev->ctxlist_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Dave Airlie30e2fb12006-02-02 19:37:46 +1100480 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000481
Dave Airlie7c1c2872008-11-28 14:22:24 +1000482 if (file_priv->is_master) {
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100483 struct drm_master *master = file_priv->master;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000484 struct drm_file *temp;
485 list_for_each_entry(temp, &dev->filelist, lhead) {
486 if ((temp->master == file_priv->master) &&
487 (temp != file_priv))
488 temp->authenticated = 0;
489 }
490
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100491 /**
492 * Since the master is disappearing, so is the
493 * possibility to lock.
494 */
495
496 if (master->lock.hw_lock) {
497 if (dev->sigdata.lock == master->lock.hw_lock)
498 dev->sigdata.lock = NULL;
499 master->lock.hw_lock = NULL;
500 master->lock.file_priv = NULL;
501 wake_up_interruptible_all(&master->lock.lock_queue);
502 }
503
Dave Airlie7c1c2872008-11-28 14:22:24 +1000504 if (file_priv->minor->master == file_priv->master) {
505 /* drop the reference held my the minor */
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000506 if (dev->driver->master_drop)
507 dev->driver->master_drop(dev, file_priv, true);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000508 drm_master_put(&file_priv->minor->master);
509 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000511
Ilija Hadzic949c4a32012-05-15 16:40:10 -0400512 BUG_ON(dev->dev_mapping == NULL);
513 iput(container_of(dev->dev_mapping, struct inode, i_data));
514
Dave Airlie7c1c2872008-11-28 14:22:24 +1000515 /* drop the reference held my the file priv */
516 drm_master_put(&file_priv->master);
517 file_priv->is_master = 0;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000518 list_del(&file_priv->lhead);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100519 mutex_unlock(&dev->struct_mutex);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000520
Dave Airlie22eae942005-11-10 22:16:34 +1100521 if (dev->driver->postclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000522 dev->driver->postclose(dev, file_priv);
Dave Airlie32488772011-11-25 15:21:02 +0000523
524 if (drm_core_check_feature(dev, DRIVER_PRIME))
525 drm_prime_destroy_file_private(&file_priv->prime);
526
Eric W. Biederman5fce5e02012-02-07 16:47:26 -0800527 put_pid(file_priv->pid);
Eric Anholt9a298b22009-03-24 12:23:04 -0700528 kfree(file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 /* ========================================================
531 * End inline drm_release
532 */
533
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000534 atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000535 if (!--dev->open_count) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000536 if (atomic_read(&dev->ioctl_count)) {
537 DRM_ERROR("Device busy: %d\n",
538 atomic_read(&dev->ioctl_count));
Arnd Bergmann58374712010-07-10 23:51:39 +0200539 retcode = -EBUSY;
Chris Wilson1a72d652010-08-11 14:41:16 +0100540 } else
541 retcode = drm_lastclose(dev);
Dave Airlie2c07a212012-02-20 14:18:07 +0000542 if (drm_device_is_unplugged(dev))
543 drm_put_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 }
Arnd Bergmann58374712010-07-10 23:51:39 +0200545 mutex_unlock(&drm_global_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 return retcode;
548}
549EXPORT_SYMBOL(drm_release);
550
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000551static bool
552drm_dequeue_event(struct drm_file *file_priv,
553 size_t total, size_t max, struct drm_pending_event **out)
554{
555 struct drm_device *dev = file_priv->minor->dev;
556 struct drm_pending_event *e;
557 unsigned long flags;
558 bool ret = false;
559
560 spin_lock_irqsave(&dev->event_lock, flags);
561
562 *out = NULL;
563 if (list_empty(&file_priv->event_list))
564 goto out;
565 e = list_first_entry(&file_priv->event_list,
566 struct drm_pending_event, link);
567 if (e->event->length + total > max)
568 goto out;
569
570 file_priv->event_space += e->event->length;
571 list_del(&e->link);
572 *out = e;
573 ret = true;
574
575out:
576 spin_unlock_irqrestore(&dev->event_lock, flags);
577 return ret;
578}
579
580ssize_t drm_read(struct file *filp, char __user *buffer,
581 size_t count, loff_t *offset)
582{
583 struct drm_file *file_priv = filp->private_data;
584 struct drm_pending_event *e;
585 size_t total;
586 ssize_t ret;
587
588 ret = wait_event_interruptible(file_priv->event_wait,
589 !list_empty(&file_priv->event_list));
590 if (ret < 0)
591 return ret;
592
593 total = 0;
594 while (drm_dequeue_event(file_priv, total, count, &e)) {
595 if (copy_to_user(buffer + total,
596 e->event, e->event->length)) {
597 total = -EFAULT;
598 break;
599 }
600
601 total += e->event->length;
602 e->destroy(e);
603 }
604
605 return total;
606}
607EXPORT_SYMBOL(drm_read);
608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
610{
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000611 struct drm_file *file_priv = filp->private_data;
612 unsigned int mask = 0;
613
614 poll_wait(filp, &file_priv->event_wait, wait);
615
616 if (!list_empty(&file_priv->event_list))
617 mask |= POLLIN | POLLRDNORM;
618
619 return mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000621EXPORT_SYMBOL(drm_poll);