blob: c00cf154cc0bbd81ce3c807fde6bffb2a5ff777f [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>
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->queue_count = 0;
79 dev->queue_reserved = 0;
80 dev->queue_slots = 0;
81 dev->queuelist = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 dev->context_flag = 0;
83 dev->interrupt_flag = 0;
84 dev->dma_flag = 0;
85 dev->last_context = 0;
86 dev->last_switch = 0;
87 dev->last_checked = 0;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100088 init_waitqueue_head(&dev->context_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 dev->if_version = 0;
90
91 dev->ctx_start = 0;
92 dev->lck_start = 0;
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 dev->buf_async = NULL;
Dave Airlieb5e89ed2005-09-25 14:28:13 +100095 init_waitqueue_head(&dev->buf_readers);
96 init_waitqueue_head(&dev->buf_writers);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Dave Airlieb5e89ed2005-09-25 14:28:13 +100098 DRM_DEBUG("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100 /*
101 * The kernel's context could be created here, but is now created
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000102 * in drm_dma_enqueue. This is more resource-efficient for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 * hardware that does not do DMA, but may mean that
104 * drm_select_queue fails between the time the interrupt is
105 * initialized and the time the queues are initialized.
106 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 return 0;
109}
110
111/**
112 * Open file.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000113 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 * \param inode device inode
115 * \param filp file pointer.
116 * \return zero on success or a negative number on failure.
117 *
118 * Searches the DRM device with the same minor number, calls open_helper(), and
119 * increments the device open count. If the open count was previous at zero,
120 * i.e., it's the first that the device is open, then calls setup().
121 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000122int drm_open(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000124 struct drm_device *dev = NULL;
Dave Airlie2c14f282008-04-21 16:47:32 +1000125 int minor_id = iminor(inode);
126 struct drm_minor *minor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 int retcode = 0;
128
Dave Airlie2c14f282008-04-21 16:47:32 +1000129 minor = idr_find(&drm_minors_idr, minor_id);
130 if (!minor)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 return -ENODEV;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000132
Dave Airlie2c14f282008-04-21 16:47:32 +1000133 if (!(dev = minor->dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 return -ENODEV;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000135
136 retcode = drm_open_helper(inode, filp, dev);
137 if (!retcode) {
138 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
Chris Wilson1a72d652010-08-11 14:41:16 +0100139 if (!dev->open_count++)
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800140 retcode = drm_setup(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 }
Chris Wilsonda584052010-03-18 11:56:54 +0000142 if (!retcode) {
143 mutex_lock(&dev->struct_mutex);
144 if (minor->type == DRM_MINOR_LEGACY) {
145 if (dev->dev_mapping == NULL)
146 dev->dev_mapping = inode->i_mapping;
147 else if (dev->dev_mapping != inode->i_mapping)
148 retcode = -ENODEV;
149 }
150 mutex_unlock(&dev->struct_mutex);
Dave Airlief453ba02008-11-07 14:05:41 -0800151 }
Jesse Barnesa2c0a972008-11-05 10:31:53 -0800152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 return retcode;
154}
155EXPORT_SYMBOL(drm_open);
156
157/**
Dave Airlied985c102006-01-02 21:32:48 +1100158 * File \c open operation.
159 *
160 * \param inode device inode.
161 * \param filp file pointer.
162 *
163 * Puts the dev->fops corresponding to the device minor number into
164 * \p filp, call the \c open method, and restore the file operations.
165 */
166int drm_stub_open(struct inode *inode, struct file *filp)
167{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000168 struct drm_device *dev = NULL;
Dave Airlie2c14f282008-04-21 16:47:32 +1000169 struct drm_minor *minor;
170 int minor_id = iminor(inode);
Dave Airlied985c102006-01-02 21:32:48 +1100171 int err = -ENODEV;
Arjan van de Ven99ac48f2006-03-28 01:56:41 -0800172 const struct file_operations *old_fops;
Dave Airlied985c102006-01-02 21:32:48 +1100173
174 DRM_DEBUG("\n");
175
Arnd Bergmann58374712010-07-10 23:51:39 +0200176 mutex_lock(&drm_global_mutex);
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;
Arjan van de Vene08e96d2011-10-31 07:28:57 -0700185 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:
Arnd Bergmann58374712010-07-10 23:51:39 +0200197 mutex_unlock(&drm_global_mutex);
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;
Dave Airlie5bcf7192010-12-07 09:20:40 +1000240 if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
241 return -EINVAL;
Dave Airlied985c102006-01-02 21:32:48 +1100242
Dave Airlie2c14f282008-04-21 16:47:32 +1000243 DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
Dave Airlied985c102006-01-02 21:32:48 +1100244
Julia Lawall6ebc22e2010-05-13 21:58:56 +0200245 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
Dave Airlied985c102006-01-02 21:32:48 +1100246 if (!priv)
247 return -ENOMEM;
248
Dave Airlied985c102006-01-02 21:32:48 +1100249 filp->private_data = priv;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000250 priv->filp = filp;
David Howells2df68b42008-09-02 11:03:14 +1000251 priv->uid = current_euid();
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -0700252 priv->pid = task_pid_nr(current);
Dave Airlie2c14f282008-04-21 16:47:32 +1000253 priv->minor = idr_find(&drm_minors_idr, minor_id);
Dave Airlied985c102006-01-02 21:32:48 +1100254 priv->ioctl_count = 0;
255 /* for compatibility root is always authenticated */
256 priv->authenticated = capable(CAP_SYS_ADMIN);
257 priv->lock_count = 0;
258
Dave Airliebd1b3312007-05-26 05:01:51 +1000259 INIT_LIST_HEAD(&priv->lhead);
Dave Airlief453ba02008-11-07 14:05:41 -0800260 INIT_LIST_HEAD(&priv->fbs);
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000261 INIT_LIST_HEAD(&priv->event_list);
262 init_waitqueue_head(&priv->event_wait);
263 priv->event_space = 4096; /* set aside 4k for event buffer */
Dave Airliebd1b3312007-05-26 05:01:51 +1000264
Eric Anholt673a3942008-07-30 12:06:12 -0700265 if (dev->driver->driver_features & DRIVER_GEM)
266 drm_gem_open(dev, priv);
267
Dave Airlied985c102006-01-02 21:32:48 +1100268 if (dev->driver->open) {
269 ret = dev->driver->open(dev, priv);
270 if (ret < 0)
271 goto out_free;
272 }
273
Dave Airliebd1b3312007-05-26 05:01:51 +1000274
Dave Airlie7c1c2872008-11-28 14:22:24 +1000275 /* if there is no current master make this fd it */
276 mutex_lock(&dev->struct_mutex);
277 if (!priv->minor->master) {
278 /* create a new master */
279 priv->minor->master = drm_master_create(priv->minor);
280 if (!priv->minor->master) {
Dan Carpenterdba5ed02009-03-27 13:34:28 +0300281 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000282 ret = -ENOMEM;
283 goto out_free;
284 }
285
286 priv->is_master = 1;
287 /* take another reference for the copy in the local file priv */
288 priv->master = drm_master_get(priv->minor->master);
289
290 priv->authenticated = 1;
291
292 mutex_unlock(&dev->struct_mutex);
293 if (dev->driver->master_create) {
294 ret = dev->driver->master_create(dev, priv->master);
295 if (ret) {
296 mutex_lock(&dev->struct_mutex);
297 /* drop both references if this fails */
298 drm_master_put(&priv->minor->master);
299 drm_master_put(&priv->master);
300 mutex_unlock(&dev->struct_mutex);
301 goto out_free;
302 }
303 }
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000304 mutex_lock(&dev->struct_mutex);
305 if (dev->driver->master_set) {
306 ret = dev->driver->master_set(dev, priv, true);
307 if (ret) {
308 /* drop both references if this fails */
309 drm_master_put(&priv->minor->master);
310 drm_master_put(&priv->master);
311 mutex_unlock(&dev->struct_mutex);
312 goto out_free;
313 }
314 }
315 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000316 } else {
317 /* get a reference to the master */
318 priv->master = drm_master_get(priv->minor->master);
319 mutex_unlock(&dev->struct_mutex);
320 }
321
322 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000323 list_add(&priv->lhead, &dev->filelist);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100324 mutex_unlock(&dev->struct_mutex);
Dave Airlied985c102006-01-02 21:32:48 +1100325
326#ifdef __alpha__
327 /*
328 * Default the hose
329 */
330 if (!dev->hose) {
331 struct pci_dev *pci_dev;
332 pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
333 if (pci_dev) {
334 dev->hose = pci_dev->sysdata;
335 pci_dev_put(pci_dev);
336 }
337 if (!dev->hose) {
338 struct pci_bus *b = pci_bus_b(pci_root_buses.next);
339 if (b)
340 dev->hose = b->sysdata;
341 }
342 }
343#endif
344
345 return 0;
346 out_free:
Eric Anholt9a298b22009-03-24 12:23:04 -0700347 kfree(priv);
Dave Airlied985c102006-01-02 21:32:48 +1100348 filp->private_data = NULL;
349 return ret;
350}
351
352/** No-op. */
353int drm_fasync(int fd, struct file *filp, int on)
354{
Dave Airlie84b1fd12007-07-11 15:53:27 +1000355 struct drm_file *priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000356 struct drm_device *dev = priv->minor->dev;
Dave Airlied985c102006-01-02 21:32:48 +1100357
358 DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,
Dave Airlie2c14f282008-04-21 16:47:32 +1000359 (long)old_encode_dev(priv->minor->device));
Jonathan Corbet60aa4922009-02-01 14:52:56 -0700360 return fasync_helper(fd, filp, on, &dev->buf_async);
Dave Airlied985c102006-01-02 21:32:48 +1100361}
362EXPORT_SYMBOL(drm_fasync);
363
Dave Airlie7c1c2872008-11-28 14:22:24 +1000364/*
365 * Reclaim locked buffers; note that this may be a bad idea if the current
366 * context doesn't have the hw lock...
367 */
368static void drm_reclaim_locked_buffers(struct drm_device *dev, struct file *f)
369{
370 struct drm_file *file_priv = f->private_data;
371
372 if (drm_i_have_hw_lock(dev, file_priv)) {
373 dev->driver->reclaim_buffers_locked(dev, file_priv);
374 } else {
375 unsigned long _end = jiffies + 3 * DRM_HZ;
376 int locked = 0;
377
378 drm_idlelock_take(&file_priv->master->lock);
379
380 /*
381 * Wait for a while.
382 */
383 do {
384 spin_lock_bh(&file_priv->master->lock.spinlock);
385 locked = file_priv->master->lock.idle_has_lock;
386 spin_unlock_bh(&file_priv->master->lock.spinlock);
387 if (locked)
388 break;
389 schedule();
390 } while (!time_after_eq(jiffies, _end));
391
392 if (!locked) {
393 DRM_ERROR("reclaim_buffers_locked() deadlock. Please rework this\n"
394 "\tdriver to use reclaim_buffers_idlelocked() instead.\n"
395 "\tI will go on reclaiming the buffers anyway.\n");
396 }
397
398 dev->driver->reclaim_buffers_locked(dev, file_priv);
399 drm_idlelock_release(&file_priv->master->lock);
400 }
401}
402
403static void drm_master_release(struct drm_device *dev, struct file *filp)
404{
405 struct drm_file *file_priv = filp->private_data;
406
407 if (dev->driver->reclaim_buffers_locked &&
408 file_priv->master->lock.hw_lock)
409 drm_reclaim_locked_buffers(dev, filp);
410
411 if (dev->driver->reclaim_buffers_idlelocked &&
412 file_priv->master->lock.hw_lock) {
413 drm_idlelock_take(&file_priv->master->lock);
414 dev->driver->reclaim_buffers_idlelocked(dev, file_priv);
415 drm_idlelock_release(&file_priv->master->lock);
416 }
417
418
419 if (drm_i_have_hw_lock(dev, file_priv)) {
420 DRM_DEBUG("File %p released, freeing lock for context %d\n",
421 filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
422 drm_lock_free(&file_priv->master->lock,
423 _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
424 }
425
426 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
427 !dev->driver->reclaim_buffers_locked) {
428 dev->driver->reclaim_buffers(dev, file_priv);
429 }
430}
431
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000432static void drm_events_release(struct drm_file *file_priv)
433{
434 struct drm_device *dev = file_priv->minor->dev;
435 struct drm_pending_event *e, *et;
436 struct drm_pending_vblank_event *v, *vt;
437 unsigned long flags;
438
439 spin_lock_irqsave(&dev->event_lock, flags);
440
441 /* Remove pending flips */
442 list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link)
443 if (v->base.file_priv == file_priv) {
444 list_del(&v->base.link);
445 drm_vblank_put(dev, v->pipe);
446 v->base.destroy(&v->base);
447 }
448
449 /* Remove unconsumed events */
450 list_for_each_entry_safe(e, et, &file_priv->event_list, link)
451 e->destroy(e);
452
453 spin_unlock_irqrestore(&dev->event_lock, flags);
454}
455
Dave Airlied985c102006-01-02 21:32:48 +1100456/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 * Release file.
458 *
459 * \param inode device inode
Eric Anholt6c340ea2007-08-25 20:23:09 +1000460 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 * \return zero on success or a negative number on failure.
462 *
463 * If the hardware lock is held then free it, and take it again for the kernel
464 * context since it's necessary to reclaim buffers. Unlink the file private
465 * data from its list and free it. Decreases the open count and if it reaches
Dave Airlie22eae942005-11-10 22:16:34 +1100466 * zero calls drm_lastclose().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000468int drm_release(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469{
Eric Anholt6c340ea2007-08-25 20:23:09 +1000470 struct drm_file *file_priv = filp->private_data;
Dave Airlie2c14f282008-04-21 16:47:32 +1000471 struct drm_device *dev = file_priv->minor->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 int retcode = 0;
473
Arnd Bergmann58374712010-07-10 23:51:39 +0200474 mutex_lock(&drm_global_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000476 DRM_DEBUG("open_count = %d\n", dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Dave Airlie22eae942005-11-10 22:16:34 +1100478 if (dev->driver->preclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000479 dev->driver->preclose(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481 /* ========================================================
482 * Begin inline drm_release
483 */
484
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000485 DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -0700486 task_pid_nr(current),
Dave Airlie2c14f282008-04-21 16:47:32 +1000487 (long)old_encode_dev(file_priv->minor->device),
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000488 dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Dave Airlie7c1c2872008-11-28 14:22:24 +1000490 /* if the master has gone away we can't do anything with the lock */
491 if (file_priv->minor->master)
492 drm_master_release(dev, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000494 drm_events_release(file_priv);
495
Eric Anholt673a3942008-07-30 12:06:12 -0700496 if (dev->driver->driver_features & DRIVER_GEM)
497 drm_gem_release(dev, file_priv);
498
Kristian Høgsbergea39f832009-02-12 14:37:56 -0500499 if (dev->driver->driver_features & DRIVER_MODESET)
500 drm_fb_release(file_priv);
501
Dave Airlie30e2fb12006-02-02 19:37:46 +1100502 mutex_lock(&dev->ctxlist_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000503 if (!list_empty(&dev->ctxlist)) {
Dave Airlie55910512007-07-11 16:53:40 +1000504 struct drm_ctx_list *pos, *n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Dave Airliebd1b3312007-05-26 05:01:51 +1000506 list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
Eric Anholt6c340ea2007-08-25 20:23:09 +1000507 if (pos->tag == file_priv &&
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000508 pos->handle != DRM_KERNEL_CONTEXT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if (dev->driver->context_dtor)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000510 dev->driver->context_dtor(dev,
511 pos->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000513 drm_ctxbitmap_free(dev, pos->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000515 list_del(&pos->head);
Eric Anholt9a298b22009-03-24 12:23:04 -0700516 kfree(pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 --dev->ctx_count;
518 }
519 }
520 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100521 mutex_unlock(&dev->ctxlist_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
Dave Airlie30e2fb12006-02-02 19:37:46 +1100523 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000524
Dave Airlie7c1c2872008-11-28 14:22:24 +1000525 if (file_priv->is_master) {
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100526 struct drm_master *master = file_priv->master;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000527 struct drm_file *temp;
528 list_for_each_entry(temp, &dev->filelist, lhead) {
529 if ((temp->master == file_priv->master) &&
530 (temp != file_priv))
531 temp->authenticated = 0;
532 }
533
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100534 /**
535 * Since the master is disappearing, so is the
536 * possibility to lock.
537 */
538
539 if (master->lock.hw_lock) {
540 if (dev->sigdata.lock == master->lock.hw_lock)
541 dev->sigdata.lock = NULL;
542 master->lock.hw_lock = NULL;
543 master->lock.file_priv = NULL;
544 wake_up_interruptible_all(&master->lock.lock_queue);
545 }
546
Dave Airlie7c1c2872008-11-28 14:22:24 +1000547 if (file_priv->minor->master == file_priv->master) {
548 /* drop the reference held my the minor */
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000549 if (dev->driver->master_drop)
550 dev->driver->master_drop(dev, file_priv, true);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000551 drm_master_put(&file_priv->minor->master);
552 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000554
555 /* drop the reference held my the file priv */
556 drm_master_put(&file_priv->master);
557 file_priv->is_master = 0;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000558 list_del(&file_priv->lhead);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100559 mutex_unlock(&dev->struct_mutex);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000560
Dave Airlie22eae942005-11-10 22:16:34 +1100561 if (dev->driver->postclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000562 dev->driver->postclose(dev, file_priv);
Eric Anholt9a298b22009-03-24 12:23:04 -0700563 kfree(file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565 /* ========================================================
566 * End inline drm_release
567 */
568
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000569 atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000570 if (!--dev->open_count) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000571 if (atomic_read(&dev->ioctl_count)) {
572 DRM_ERROR("Device busy: %d\n",
573 atomic_read(&dev->ioctl_count));
Arnd Bergmann58374712010-07-10 23:51:39 +0200574 retcode = -EBUSY;
Chris Wilson1a72d652010-08-11 14:41:16 +0100575 } else
576 retcode = drm_lastclose(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 }
Arnd Bergmann58374712010-07-10 23:51:39 +0200578 mutex_unlock(&drm_global_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 return retcode;
581}
582EXPORT_SYMBOL(drm_release);
583
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000584static bool
585drm_dequeue_event(struct drm_file *file_priv,
586 size_t total, size_t max, struct drm_pending_event **out)
587{
588 struct drm_device *dev = file_priv->minor->dev;
589 struct drm_pending_event *e;
590 unsigned long flags;
591 bool ret = false;
592
593 spin_lock_irqsave(&dev->event_lock, flags);
594
595 *out = NULL;
596 if (list_empty(&file_priv->event_list))
597 goto out;
598 e = list_first_entry(&file_priv->event_list,
599 struct drm_pending_event, link);
600 if (e->event->length + total > max)
601 goto out;
602
603 file_priv->event_space += e->event->length;
604 list_del(&e->link);
605 *out = e;
606 ret = true;
607
608out:
609 spin_unlock_irqrestore(&dev->event_lock, flags);
610 return ret;
611}
612
613ssize_t drm_read(struct file *filp, char __user *buffer,
614 size_t count, loff_t *offset)
615{
616 struct drm_file *file_priv = filp->private_data;
617 struct drm_pending_event *e;
618 size_t total;
619 ssize_t ret;
620
621 ret = wait_event_interruptible(file_priv->event_wait,
622 !list_empty(&file_priv->event_list));
623 if (ret < 0)
624 return ret;
625
626 total = 0;
627 while (drm_dequeue_event(file_priv, total, count, &e)) {
628 if (copy_to_user(buffer + total,
629 e->event, e->event->length)) {
630 total = -EFAULT;
631 break;
632 }
633
634 total += e->event->length;
635 e->destroy(e);
636 }
637
638 return total;
639}
640EXPORT_SYMBOL(drm_read);
641
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
643{
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000644 struct drm_file *file_priv = filp->private_data;
645 unsigned int mask = 0;
646
647 poll_wait(filp, &file_priv->event_wait, wait);
648
649 if (!list_empty(&file_priv->event_list))
650 mask |= POLLIN | POLLRDNORM;
651
652 return mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000654EXPORT_SYMBOL(drm_poll);