blob: 3e6694633f42af404fcb3979fc69a81f06b1a929 [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>
David Herrmanne7b960702014-07-24 12:10:04 +020041#include "drm_legacy.h"
Daniel Vetter67d0ec42014-09-10 12:43:53 +020042#include "drm_internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
David Herrmann0d639882014-02-24 15:53:25 +010044/* from BKL pushdown */
Arnd Bergmann58374712010-07-10 23:51:39 +020045DEFINE_MUTEX(drm_global_mutex);
46
Ilija Hadzic1dcc0ce2014-04-28 10:23:57 -040047static int drm_open_helper(struct file *filp, struct drm_minor *minor);
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{
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 int ret;
52
Daniel Vetter7d14bb6b2013-08-08 15:41:15 +020053 if (dev->driver->firstopen &&
54 !drm_core_check_feature(dev, DRIVER_MODESET)) {
Dave Airlie22eae942005-11-10 22:16:34 +110055 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
Daniel Vetterf336ab72013-08-08 15:41:35 +020060 ret = drm_legacy_dma_setup(dev);
61 if (ret < 0)
62 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Dave Airlieb5e89ed2005-09-25 14:28:13 +100065 DRM_DEBUG("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 return 0;
67}
68
69/**
70 * Open file.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100071 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 * \param inode device inode
73 * \param filp file pointer.
74 * \return zero on success or a negative number on failure.
75 *
76 * Searches the DRM device with the same minor number, calls open_helper(), and
77 * increments the device open count. If the open count was previous at zero,
78 * i.e., it's the first that the device is open, then calls setup().
79 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +100080int drm_open(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081{
David Herrmann1616c522014-01-29 10:49:19 +010082 struct drm_device *dev;
Dave Airlie2c14f282008-04-21 16:47:32 +100083 struct drm_minor *minor;
David Herrmann1616c522014-01-29 10:49:19 +010084 int retcode;
Ilija Hadzicfdb40a02012-10-29 17:35:01 +000085 int need_setup = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
David Herrmann1616c522014-01-29 10:49:19 +010087 minor = drm_minor_acquire(iminor(inode));
88 if (IS_ERR(minor))
89 return PTR_ERR(minor);
Dave Airlieb5e89ed2005-09-25 14:28:13 +100090
David Herrmann1616c522014-01-29 10:49:19 +010091 dev = minor->dev;
Ilija Hadzicfdb40a02012-10-29 17:35:01 +000092 if (!dev->open_count++)
93 need_setup = 1;
Jesse Barnesa2c0a972008-11-05 10:31:53 -080094
David Herrmann6796cb12014-01-03 14:24:19 +010095 /* share address_space across all char-devs of a single device */
96 filp->f_mapping = dev->anon_inode->i_mapping;
Dave Airlied985c102006-01-02 21:32:48 +110097
Ilija Hadzic1dcc0ce2014-04-28 10:23:57 -040098 retcode = drm_open_helper(filp, minor);
Ilija Hadzicfdb40a02012-10-29 17:35:01 +000099 if (retcode)
100 goto err_undo;
Ilija Hadzicfdb40a02012-10-29 17:35:01 +0000101 if (need_setup) {
102 retcode = drm_setup(dev);
103 if (retcode)
104 goto err_undo;
105 }
106 return 0;
107
108err_undo:
Ilija Hadzicfdb40a02012-10-29 17:35:01 +0000109 dev->open_count--;
David Herrmann1616c522014-01-29 10:49:19 +0100110 drm_minor_release(minor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 return retcode;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000112}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113EXPORT_SYMBOL(drm_open);
114
115/**
Dave Airlied985c102006-01-02 21:32:48 +1100116 * Check whether DRI will run on this CPU.
117 *
118 * \return non-zero if the DRI will run on this CPU, or zero otherwise.
119 */
120static int drm_cpu_valid(void)
121{
Dave Airlied985c102006-01-02 21:32:48 +1100122#if defined(__sparc__) && !defined(__sparc_v9__)
123 return 0; /* No cmpxchg before v9 sparc. */
124#endif
125 return 1;
126}
127
128/**
129 * Called whenever a process opens /dev/drm.
130 *
Dave Airlied985c102006-01-02 21:32:48 +1100131 * \param filp file pointer.
David Herrmannf4aede22014-01-29 10:18:02 +0100132 * \param minor acquired minor-object.
Dave Airlied985c102006-01-02 21:32:48 +1100133 * \return zero on success or a negative number on failure.
134 *
135 * Creates and initializes a drm_file structure for the file private data in \p
136 * filp and add it into the double linked list in \p dev.
137 */
Ilija Hadzic1dcc0ce2014-04-28 10:23:57 -0400138static int drm_open_helper(struct file *filp, struct drm_minor *minor)
Dave Airlied985c102006-01-02 21:32:48 +1100139{
David Herrmannf4aede22014-01-29 10:18:02 +0100140 struct drm_device *dev = minor->dev;
Dave Airlie84b1fd12007-07-11 15:53:27 +1000141 struct drm_file *priv;
Dave Airlied985c102006-01-02 21:32:48 +1100142 int ret;
143
144 if (filp->f_flags & O_EXCL)
145 return -EBUSY; /* No exclusive opens */
146 if (!drm_cpu_valid())
147 return -EINVAL;
Dave Airlie13bb9cc2012-09-12 15:55:05 +1000148 if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF)
Dave Airlie5bcf7192010-12-07 09:20:40 +1000149 return -EINVAL;
Dave Airlied985c102006-01-02 21:32:48 +1100150
David Herrmannf4aede22014-01-29 10:18:02 +0100151 DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index);
Dave Airlied985c102006-01-02 21:32:48 +1100152
Julia Lawall6ebc22e2010-05-13 21:58:56 +0200153 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
Dave Airlied985c102006-01-02 21:32:48 +1100154 if (!priv)
155 return -ENOMEM;
156
Dave Airlied985c102006-01-02 21:32:48 +1100157 filp->private_data = priv;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000158 priv->filp = filp;
David Howells2df68b42008-09-02 11:03:14 +1000159 priv->uid = current_euid();
Eric W. Biederman5fce5e02012-02-07 16:47:26 -0800160 priv->pid = get_pid(task_pid(current));
David Herrmannf4aede22014-01-29 10:18:02 +0100161 priv->minor = minor;
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900162
Dave Airlied985c102006-01-02 21:32:48 +1100163 /* for compatibility root is always authenticated */
David Herrmann3cb01a92014-07-22 17:12:26 +0200164 priv->authenticated = capable(CAP_SYS_ADMIN);
Dave Airlied985c102006-01-02 21:32:48 +1100165 priv->lock_count = 0;
166
Dave Airliebd1b3312007-05-26 05:01:51 +1000167 INIT_LIST_HEAD(&priv->lhead);
Dave Airlief453ba02008-11-07 14:05:41 -0800168 INIT_LIST_HEAD(&priv->fbs);
Daniel Vetter4b096ac2012-12-10 21:19:18 +0100169 mutex_init(&priv->fbs_lock);
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000170 INIT_LIST_HEAD(&priv->event_list);
171 init_waitqueue_head(&priv->event_wait);
172 priv->event_space = 4096; /* set aside 4k for event buffer */
Dave Airliebd1b3312007-05-26 05:01:51 +1000173
Eric Anholt673a3942008-07-30 12:06:12 -0700174 if (dev->driver->driver_features & DRIVER_GEM)
175 drm_gem_open(dev, priv);
176
Dave Airlie32488772011-11-25 15:21:02 +0000177 if (drm_core_check_feature(dev, DRIVER_PRIME))
178 drm_prime_init_file_private(&priv->prime);
179
Dave Airlied985c102006-01-02 21:32:48 +1100180 if (dev->driver->open) {
181 ret = dev->driver->open(dev, priv);
182 if (ret < 0)
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900183 goto out_prime_destroy;
Dave Airlied985c102006-01-02 21:32:48 +1100184 }
185
David Herrmann17931262013-08-25 18:29:00 +0200186 /* if there is no current master make this fd it, but do not create
187 * any master object for render clients */
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100188 mutex_lock(&dev->master_mutex);
Thomas Hellstrom43683052014-03-13 11:07:44 +0100189 if (drm_is_primary_client(priv) && !priv->minor->master) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000190 /* create a new master */
191 priv->minor->master = drm_master_create(priv->minor);
192 if (!priv->minor->master) {
193 ret = -ENOMEM;
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900194 goto out_close;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000195 }
196
Dave Airlie7963e9d2014-08-08 07:30:53 +1000197 priv->is_master = 1;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000198 /* take another reference for the copy in the local file priv */
199 priv->master = drm_master_get(priv->minor->master);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000200 priv->authenticated = 1;
201
Dave Airlie7c1c2872008-11-28 14:22:24 +1000202 if (dev->driver->master_create) {
203 ret = dev->driver->master_create(dev, priv->master);
204 if (ret) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000205 /* drop both references if this fails */
206 drm_master_put(&priv->minor->master);
207 drm_master_put(&priv->master);
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900208 goto out_close;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000209 }
210 }
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000211 if (dev->driver->master_set) {
212 ret = dev->driver->master_set(dev, priv, true);
213 if (ret) {
214 /* drop both references if this fails */
215 drm_master_put(&priv->minor->master);
216 drm_master_put(&priv->master);
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900217 goto out_close;
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000218 }
219 }
Thomas Hellstrom43683052014-03-13 11:07:44 +0100220 } else if (drm_is_primary_client(priv)) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000221 /* get a reference to the master */
222 priv->master = drm_master_get(priv->minor->master);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000223 }
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100224 mutex_unlock(&dev->master_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000225
226 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000227 list_add(&priv->lhead, &dev->filelist);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100228 mutex_unlock(&dev->struct_mutex);
Dave Airlied985c102006-01-02 21:32:48 +1100229
230#ifdef __alpha__
231 /*
232 * Default the hose
233 */
234 if (!dev->hose) {
235 struct pci_dev *pci_dev;
236 pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
237 if (pci_dev) {
238 dev->hose = pci_dev->sysdata;
239 pci_dev_put(pci_dev);
240 }
241 if (!dev->hose) {
Yijing Wang59c1ad3b2014-02-13 21:14:00 +0800242 struct pci_bus *b = list_entry(pci_root_buses.next,
243 struct pci_bus, node);
Dave Airlied985c102006-01-02 21:32:48 +1100244 if (b)
245 dev->hose = b->sysdata;
246 }
247 }
248#endif
249
250 return 0;
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900251
252out_close:
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100253 mutex_unlock(&dev->master_mutex);
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900254 if (dev->driver->postclose)
255 dev->driver->postclose(dev, priv);
256out_prime_destroy:
257 if (drm_core_check_feature(dev, DRIVER_PRIME))
258 drm_prime_destroy_file_private(&priv->prime);
259 if (dev->driver->driver_features & DRIVER_GEM)
260 drm_gem_release(dev, priv);
Seung-Woo Kimdf9b6a92013-07-02 09:53:28 +0900261 put_pid(priv->pid);
Eric Anholt9a298b22009-03-24 12:23:04 -0700262 kfree(priv);
Dave Airlied985c102006-01-02 21:32:48 +1100263 filp->private_data = NULL;
264 return ret;
265}
266
Dave Airlie7c1c2872008-11-28 14:22:24 +1000267static void drm_master_release(struct drm_device *dev, struct file *filp)
268{
269 struct drm_file *file_priv = filp->private_data;
270
David Herrmannbb6d8222014-08-29 12:12:46 +0200271 if (drm_legacy_i_have_hw_lock(dev, file_priv)) {
Dave Airlie7c1c2872008-11-28 14:22:24 +1000272 DRM_DEBUG("File %p released, freeing lock for context %d\n",
273 filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
David Herrmannbb6d8222014-08-29 12:12:46 +0200274 drm_legacy_lock_free(&file_priv->master->lock,
275 _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
Dave Airlie7c1c2872008-11-28 14:22:24 +1000276 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000277}
278
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000279static void drm_events_release(struct drm_file *file_priv)
280{
281 struct drm_device *dev = file_priv->minor->dev;
282 struct drm_pending_event *e, *et;
283 struct drm_pending_vblank_event *v, *vt;
284 unsigned long flags;
285
286 spin_lock_irqsave(&dev->event_lock, flags);
287
288 /* Remove pending flips */
289 list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link)
290 if (v->base.file_priv == file_priv) {
291 list_del(&v->base.link);
292 drm_vblank_put(dev, v->pipe);
293 v->base.destroy(&v->base);
294 }
295
296 /* Remove unconsumed events */
YoungJun Cho1dda6802013-10-29 20:30:26 +0900297 list_for_each_entry_safe(e, et, &file_priv->event_list, link) {
298 list_del(&e->link);
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000299 e->destroy(e);
YoungJun Cho1dda6802013-10-29 20:30:26 +0900300 }
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000301
302 spin_unlock_irqrestore(&dev->event_lock, flags);
303}
304
Dave Airlied985c102006-01-02 21:32:48 +1100305/**
David Herrmann1c8887d2013-10-02 11:23:36 +0200306 * drm_legacy_dev_reinit
307 *
308 * Reinitializes a legacy/ums drm device in it's lastclose function.
309 */
310static void drm_legacy_dev_reinit(struct drm_device *dev)
311{
David Herrmann1c8887d2013-10-02 11:23:36 +0200312 if (drm_core_check_feature(dev, DRIVER_MODESET))
313 return;
314
David Herrmann1c8887d2013-10-02 11:23:36 +0200315 dev->sigdata.lock = NULL;
316
317 dev->context_flag = 0;
318 dev->last_context = 0;
319 dev->if_version = 0;
320}
321
322/**
323 * Take down the DRM device.
324 *
325 * \param dev DRM device structure.
326 *
327 * Frees every resource in \p dev.
328 *
329 * \sa drm_device
330 */
331int drm_lastclose(struct drm_device * dev)
332{
David Herrmann1c8887d2013-10-02 11:23:36 +0200333 DRM_DEBUG("\n");
334
335 if (dev->driver->lastclose)
336 dev->driver->lastclose(dev);
337 DRM_DEBUG("driver lastclose completed\n");
338
339 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
340 drm_irq_uninstall(dev);
341
342 mutex_lock(&dev->struct_mutex);
343
344 drm_agp_clear(dev);
345
346 drm_legacy_sg_cleanup(dev);
David Herrmann03decbe2014-08-29 12:12:29 +0200347 drm_legacy_vma_flush(dev);
David Herrmann1c8887d2013-10-02 11:23:36 +0200348 drm_legacy_dma_takedown(dev);
349
David Herrmann1c8887d2013-10-02 11:23:36 +0200350 mutex_unlock(&dev->struct_mutex);
351
352 drm_legacy_dev_reinit(dev);
353
354 DRM_DEBUG("lastclose completed\n");
355 return 0;
356}
357
358/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 * Release file.
360 *
361 * \param inode device inode
Eric Anholt6c340ea2007-08-25 20:23:09 +1000362 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 * \return zero on success or a negative number on failure.
364 *
365 * If the hardware lock is held then free it, and take it again for the kernel
366 * context since it's necessary to reclaim buffers. Unlink the file private
367 * data from its list and free it. Decreases the open count and if it reaches
Dave Airlie22eae942005-11-10 22:16:34 +1100368 * zero calls drm_lastclose().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000370int drm_release(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371{
Eric Anholt6c340ea2007-08-25 20:23:09 +1000372 struct drm_file *file_priv = filp->private_data;
David Herrmann1616c522014-01-29 10:49:19 +0100373 struct drm_minor *minor = file_priv->minor;
374 struct drm_device *dev = minor->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 int retcode = 0;
376
Arnd Bergmann58374712010-07-10 23:51:39 +0200377 mutex_lock(&drm_global_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000379 DRM_DEBUG("open_count = %d\n", dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Chris Wilsondff01de2014-07-24 14:23:10 +0100381 mutex_lock(&dev->struct_mutex);
382 list_del(&file_priv->lhead);
383 mutex_unlock(&dev->struct_mutex);
384
Dave Airlie22eae942005-11-10 22:16:34 +1100385 if (dev->driver->preclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000386 dev->driver->preclose(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388 /* ========================================================
389 * Begin inline drm_release
390 */
391
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000392 DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -0700393 task_pid_nr(current),
David Herrmann58178782014-01-29 13:12:31 +0100394 (long)old_encode_dev(file_priv->minor->kdev->devt),
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000395 dev->open_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Thomas Hellstrom598781d2012-01-24 18:54:21 +0100397 /* Release any auth tokens that might point to this file_priv,
398 (do that under the drm_global_mutex) */
399 if (file_priv->magic)
400 (void) drm_remove_magic(file_priv->master, file_priv->magic);
401
Dave Airlie7c1c2872008-11-28 14:22:24 +1000402 /* if the master has gone away we can't do anything with the lock */
403 if (file_priv->minor->master)
404 drm_master_release(dev, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Daniel Vetter67cb4b42011-10-26 00:31:26 +0200406 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
Daniel Vettera2661622014-09-11 07:41:51 +0200407 drm_legacy_reclaim_buffers(dev, file_priv);
Daniel Vetter67cb4b42011-10-26 00:31:26 +0200408
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000409 drm_events_release(file_priv);
410
Kristian Høgsbergea39f832009-02-12 14:37:56 -0500411 if (dev->driver->driver_features & DRIVER_MODESET)
412 drm_fb_release(file_priv);
413
Prathyush4e47e022012-04-14 17:22:13 +0530414 if (dev->driver->driver_features & DRIVER_GEM)
415 drm_gem_release(dev, file_priv);
416
David Herrmanne7b960702014-07-24 12:10:04 +0200417 drm_legacy_ctxbitmap_flush(dev, file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100419 mutex_lock(&dev->master_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000420
Dave Airlie7963e9d2014-08-08 07:30:53 +1000421 if (file_priv->is_master) {
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100422 struct drm_master *master = file_priv->master;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000423
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100424 /**
425 * Since the master is disappearing, so is the
426 * possibility to lock.
427 */
David Herrmann3cb01a92014-07-22 17:12:26 +0200428 mutex_lock(&dev->struct_mutex);
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100429 if (master->lock.hw_lock) {
430 if (dev->sigdata.lock == master->lock.hw_lock)
431 dev->sigdata.lock = NULL;
432 master->lock.hw_lock = NULL;
433 master->lock.file_priv = NULL;
434 wake_up_interruptible_all(&master->lock.lock_queue);
435 }
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100436 mutex_unlock(&dev->struct_mutex);
Thomas Hellstromfda714c2009-03-02 11:10:56 +0100437
Dave Airlie7c1c2872008-11-28 14:22:24 +1000438 if (file_priv->minor->master == file_priv->master) {
439 /* drop the reference held my the minor */
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000440 if (dev->driver->master_drop)
441 dev->driver->master_drop(dev, file_priv, true);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000442 drm_master_put(&file_priv->minor->master);
443 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000445
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100446 /* drop the master reference held by the file priv */
David Herrmann17931262013-08-25 18:29:00 +0200447 if (file_priv->master)
448 drm_master_put(&file_priv->master);
Dave Airlie7963e9d2014-08-08 07:30:53 +1000449 file_priv->is_master = 0;
Thomas Hellstromc996fd02014-02-25 19:57:44 +0100450 mutex_unlock(&dev->master_mutex);
451
Dave Airlie22eae942005-11-10 22:16:34 +1100452 if (dev->driver->postclose)
Eric Anholt6c340ea2007-08-25 20:23:09 +1000453 dev->driver->postclose(dev, file_priv);
Dave Airlie32488772011-11-25 15:21:02 +0000454
Daniel Vetter319c9332013-08-15 00:02:46 +0200455
Dave Airlie32488772011-11-25 15:21:02 +0000456 if (drm_core_check_feature(dev, DRIVER_PRIME))
457 drm_prime_destroy_file_private(&file_priv->prime);
458
Ville Syrjäläddde4372014-08-06 14:02:50 +0300459 WARN_ON(!list_empty(&file_priv->event_list));
460
Eric W. Biederman5fce5e02012-02-07 16:47:26 -0800461 put_pid(file_priv->pid);
Eric Anholt9a298b22009-03-24 12:23:04 -0700462 kfree(file_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464 /* ========================================================
465 * End inline drm_release
466 */
467
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000468 if (!--dev->open_count) {
Daniel Vetter43d13372013-12-11 11:35:08 +0100469 retcode = drm_lastclose(dev);
Dave Airlie2c07a212012-02-20 14:18:07 +0000470 if (drm_device_is_unplugged(dev))
471 drm_put_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 }
Arnd Bergmann58374712010-07-10 23:51:39 +0200473 mutex_unlock(&drm_global_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
David Herrmann1616c522014-01-29 10:49:19 +0100475 drm_minor_release(minor);
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 return retcode;
478}
479EXPORT_SYMBOL(drm_release);
480
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000481static bool
482drm_dequeue_event(struct drm_file *file_priv,
483 size_t total, size_t max, struct drm_pending_event **out)
484{
485 struct drm_device *dev = file_priv->minor->dev;
486 struct drm_pending_event *e;
487 unsigned long flags;
488 bool ret = false;
489
490 spin_lock_irqsave(&dev->event_lock, flags);
491
492 *out = NULL;
493 if (list_empty(&file_priv->event_list))
494 goto out;
495 e = list_first_entry(&file_priv->event_list,
496 struct drm_pending_event, link);
497 if (e->event->length + total > max)
498 goto out;
499
500 file_priv->event_space += e->event->length;
501 list_del(&e->link);
502 *out = e;
503 ret = true;
504
505out:
506 spin_unlock_irqrestore(&dev->event_lock, flags);
507 return ret;
508}
509
510ssize_t drm_read(struct file *filp, char __user *buffer,
511 size_t count, loff_t *offset)
512{
513 struct drm_file *file_priv = filp->private_data;
514 struct drm_pending_event *e;
515 size_t total;
516 ssize_t ret;
517
518 ret = wait_event_interruptible(file_priv->event_wait,
519 !list_empty(&file_priv->event_list));
520 if (ret < 0)
521 return ret;
522
523 total = 0;
524 while (drm_dequeue_event(file_priv, total, count, &e)) {
525 if (copy_to_user(buffer + total,
526 e->event, e->event->length)) {
527 total = -EFAULT;
528 break;
529 }
530
531 total += e->event->length;
532 e->destroy(e);
533 }
534
535 return total;
536}
537EXPORT_SYMBOL(drm_read);
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait)
540{
Kristian Høgsbergc9a9c5e2009-09-12 04:33:34 +1000541 struct drm_file *file_priv = filp->private_data;
542 unsigned int mask = 0;
543
544 poll_wait(filp, &file_priv->event_wait, wait);
545
546 if (!list_empty(&file_priv->event_list))
547 mask |= POLLIN | POLLRDNORM;
548
549 return mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000551EXPORT_SYMBOL(drm_poll);