Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 2 | * \file drm_fops.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * File operations for DRM |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 6 | * \author Daryll Strauss <daryll@valinux.com> |
| 7 | * \author Gareth Hughes <gareth@valinux.com> |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com |
| 12 | * |
| 13 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. |
| 14 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 15 | * All Rights Reserved. |
| 16 | * |
| 17 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 18 | * copy of this software and associated documentation files (the "Software"), |
| 19 | * to deal in the Software without restriction, including without limitation |
| 20 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 21 | * and/or sell copies of the Software, and to permit persons to whom the |
| 22 | * Software is furnished to do so, subject to the following conditions: |
| 23 | * |
| 24 | * The above copyright notice and this permission notice (including the next |
| 25 | * paragraph) shall be included in all copies or substantial portions of the |
| 26 | * Software. |
| 27 | * |
| 28 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 29 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 30 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 31 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 32 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 33 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 34 | * OTHER DEALINGS IN THE SOFTWARE. |
| 35 | */ |
| 36 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 37 | #include <drm/drmP.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/poll.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 39 | #include <linux/slab.h> |
Paul Gortmaker | e0cd360 | 2011-08-30 11:04:30 -0400 | [diff] [blame] | 40 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 42 | /* from BKL pushdown: note that nothing else serializes idr_find() */ |
| 43 | DEFINE_MUTEX(drm_global_mutex); |
Ben Skeggs | e3461a2 | 2010-08-26 14:58:57 +1000 | [diff] [blame] | 44 | EXPORT_SYMBOL(drm_global_mutex); |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 45 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 46 | static int drm_open_helper(struct inode *inode, struct file *filp, |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 47 | struct drm_device * dev); |
Dave Airlie | c94f702 | 2005-07-07 21:03:38 +1000 | [diff] [blame] | 48 | |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 49 | static int drm_setup(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | int ret; |
| 52 | |
Daniel Vetter | 7d14bb6b | 2013-08-08 15:41:15 +0200 | [diff] [blame] | 53 | if (dev->driver->firstopen && |
| 54 | !drm_core_check_feature(dev, DRIVER_MODESET)) { |
Dave Airlie | 22eae94 | 2005-11-10 22:16:34 +1100 | [diff] [blame] | 55 | ret = dev->driver->firstopen(dev); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 56 | if (ret != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | return ret; |
| 58 | } |
| 59 | |
Daniel Vetter | f336ab7 | 2013-08-08 15:41:35 +0200 | [diff] [blame] | 60 | ret = drm_legacy_dma_setup(dev); |
| 61 | if (ret < 0) |
| 62 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 65 | DRM_DEBUG("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Open file. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 71 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | * \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 Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 80 | int drm_open(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 82 | struct drm_device *dev = NULL; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 83 | int minor_id = iminor(inode); |
| 84 | struct drm_minor *minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | int retcode = 0; |
Ilija Hadzic | fdb40a0 | 2012-10-29 17:35:01 +0000 | [diff] [blame] | 86 | int need_setup = 0; |
| 87 | struct address_space *old_mapping; |
Ilija Hadzic | a8ec3a6 | 2013-04-02 09:56:10 -0400 | [diff] [blame] | 88 | struct address_space *old_imapping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 90 | minor = idr_find(&drm_minors_idr, minor_id); |
| 91 | if (!minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | return -ENODEV; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 93 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 94 | if (!(dev = minor->dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | return -ENODEV; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 96 | |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 97 | if (drm_device_is_unplugged(dev)) |
| 98 | return -ENODEV; |
| 99 | |
Ilija Hadzic | fdb40a0 | 2012-10-29 17:35:01 +0000 | [diff] [blame] | 100 | if (!dev->open_count++) |
| 101 | need_setup = 1; |
| 102 | mutex_lock(&dev->struct_mutex); |
Ilija Hadzic | a8ec3a6 | 2013-04-02 09:56:10 -0400 | [diff] [blame] | 103 | old_imapping = inode->i_mapping; |
Ilija Hadzic | fdb40a0 | 2012-10-29 17:35:01 +0000 | [diff] [blame] | 104 | old_mapping = dev->dev_mapping; |
| 105 | if (old_mapping == NULL) |
| 106 | dev->dev_mapping = &inode->i_data; |
| 107 | /* ihold ensures nobody can remove inode with our i_data */ |
| 108 | ihold(container_of(dev->dev_mapping, struct inode, i_data)); |
| 109 | inode->i_mapping = dev->dev_mapping; |
| 110 | filp->f_mapping = dev->dev_mapping; |
| 111 | mutex_unlock(&dev->struct_mutex); |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 112 | |
Ilija Hadzic | fdb40a0 | 2012-10-29 17:35:01 +0000 | [diff] [blame] | 113 | retcode = drm_open_helper(inode, filp, dev); |
| 114 | if (retcode) |
| 115 | goto err_undo; |
Ilija Hadzic | fdb40a0 | 2012-10-29 17:35:01 +0000 | [diff] [blame] | 116 | if (need_setup) { |
| 117 | retcode = drm_setup(dev); |
| 118 | if (retcode) |
| 119 | goto err_undo; |
| 120 | } |
| 121 | return 0; |
| 122 | |
| 123 | err_undo: |
| 124 | mutex_lock(&dev->struct_mutex); |
Ilija Hadzic | a8ec3a6 | 2013-04-02 09:56:10 -0400 | [diff] [blame] | 125 | filp->f_mapping = old_imapping; |
| 126 | inode->i_mapping = old_imapping; |
Ilija Hadzic | fdb40a0 | 2012-10-29 17:35:01 +0000 | [diff] [blame] | 127 | iput(container_of(dev->dev_mapping, struct inode, i_data)); |
| 128 | dev->dev_mapping = old_mapping; |
| 129 | mutex_unlock(&dev->struct_mutex); |
| 130 | dev->open_count--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | return retcode; |
| 132 | } |
| 133 | EXPORT_SYMBOL(drm_open); |
| 134 | |
| 135 | /** |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 136 | * File \c open operation. |
| 137 | * |
| 138 | * \param inode device inode. |
| 139 | * \param filp file pointer. |
| 140 | * |
| 141 | * Puts the dev->fops corresponding to the device minor number into |
| 142 | * \p filp, call the \c open method, and restore the file operations. |
| 143 | */ |
| 144 | int drm_stub_open(struct inode *inode, struct file *filp) |
| 145 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 146 | struct drm_device *dev = NULL; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 147 | struct drm_minor *minor; |
| 148 | int minor_id = iminor(inode); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 149 | int err = -ENODEV; |
Arjan van de Ven | 99ac48f | 2006-03-28 01:56:41 -0800 | [diff] [blame] | 150 | const struct file_operations *old_fops; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 151 | |
| 152 | DRM_DEBUG("\n"); |
| 153 | |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 154 | mutex_lock(&drm_global_mutex); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 155 | minor = idr_find(&drm_minors_idr, minor_id); |
| 156 | if (!minor) |
Jonathan Corbet | 70ffa16 | 2008-05-15 11:34:16 -0600 | [diff] [blame] | 157 | goto out; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 158 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 159 | if (!(dev = minor->dev)) |
Jonathan Corbet | 70ffa16 | 2008-05-15 11:34:16 -0600 | [diff] [blame] | 160 | goto out; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 161 | |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 162 | if (drm_device_is_unplugged(dev)) |
| 163 | goto out; |
| 164 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 165 | old_fops = filp->f_op; |
Arjan van de Ven | e08e96d | 2011-10-31 07:28:57 -0700 | [diff] [blame] | 166 | filp->f_op = fops_get(dev->driver->fops); |
Laurent Pinchart | f41ced8 | 2009-01-06 14:40:40 -0800 | [diff] [blame] | 167 | if (filp->f_op == NULL) { |
| 168 | filp->f_op = old_fops; |
| 169 | goto out; |
| 170 | } |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 171 | if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) { |
| 172 | fops_put(filp->f_op); |
| 173 | filp->f_op = fops_get(old_fops); |
| 174 | } |
| 175 | fops_put(old_fops); |
| 176 | |
Jonathan Corbet | 70ffa16 | 2008-05-15 11:34:16 -0600 | [diff] [blame] | 177 | out: |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 178 | mutex_unlock(&drm_global_mutex); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 179 | return err; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Check whether DRI will run on this CPU. |
| 184 | * |
| 185 | * \return non-zero if the DRI will run on this CPU, or zero otherwise. |
| 186 | */ |
| 187 | static int drm_cpu_valid(void) |
| 188 | { |
| 189 | #if defined(__i386__) |
| 190 | if (boot_cpu_data.x86 == 3) |
| 191 | return 0; /* No cmpxchg on a 386 */ |
| 192 | #endif |
| 193 | #if defined(__sparc__) && !defined(__sparc_v9__) |
| 194 | return 0; /* No cmpxchg before v9 sparc. */ |
| 195 | #endif |
| 196 | return 1; |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Called whenever a process opens /dev/drm. |
| 201 | * |
| 202 | * \param inode device inode. |
| 203 | * \param filp file pointer. |
| 204 | * \param dev device. |
| 205 | * \return zero on success or a negative number on failure. |
| 206 | * |
| 207 | * Creates and initializes a drm_file structure for the file private data in \p |
| 208 | * filp and add it into the double linked list in \p dev. |
| 209 | */ |
| 210 | static int drm_open_helper(struct inode *inode, struct file *filp, |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 211 | struct drm_device * dev) |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 212 | { |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 213 | int minor_id = iminor(inode); |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 214 | struct drm_file *priv; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 215 | int ret; |
| 216 | |
| 217 | if (filp->f_flags & O_EXCL) |
| 218 | return -EBUSY; /* No exclusive opens */ |
| 219 | if (!drm_cpu_valid()) |
| 220 | return -EINVAL; |
Dave Airlie | 13bb9cc | 2012-09-12 15:55:05 +1000 | [diff] [blame] | 221 | if (dev->switch_power_state != DRM_SWITCH_POWER_ON && dev->switch_power_state != DRM_SWITCH_POWER_DYNAMIC_OFF) |
Dave Airlie | 5bcf719 | 2010-12-07 09:20:40 +1000 | [diff] [blame] | 222 | return -EINVAL; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 223 | |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 224 | DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 225 | |
Julia Lawall | 6ebc22e | 2010-05-13 21:58:56 +0200 | [diff] [blame] | 226 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 227 | if (!priv) |
| 228 | return -ENOMEM; |
| 229 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 230 | filp->private_data = priv; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 231 | priv->filp = filp; |
David Howells | 2df68b4 | 2008-09-02 11:03:14 +1000 | [diff] [blame] | 232 | priv->uid = current_euid(); |
Eric W. Biederman | 5fce5e0 | 2012-02-07 16:47:26 -0800 | [diff] [blame] | 233 | priv->pid = get_pid(task_pid(current)); |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 234 | priv->minor = idr_find(&drm_minors_idr, minor_id); |
Seung-Woo Kim | df9b6a9 | 2013-07-02 09:53:28 +0900 | [diff] [blame] | 235 | if (!priv->minor) { |
| 236 | ret = -ENODEV; |
| 237 | goto out_put_pid; |
| 238 | } |
| 239 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 240 | priv->ioctl_count = 0; |
| 241 | /* for compatibility root is always authenticated */ |
Chris Wilson | 1020dc6 | 2013-10-29 08:55:57 +0000 | [diff] [blame^] | 242 | priv->always_authenticated = capable(CAP_SYS_ADMIN); |
| 243 | priv->authenticated = priv->always_authenticated; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 244 | priv->lock_count = 0; |
| 245 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 246 | INIT_LIST_HEAD(&priv->lhead); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 247 | INIT_LIST_HEAD(&priv->fbs); |
Daniel Vetter | 4b096ac | 2012-12-10 21:19:18 +0100 | [diff] [blame] | 248 | mutex_init(&priv->fbs_lock); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 249 | INIT_LIST_HEAD(&priv->event_list); |
| 250 | init_waitqueue_head(&priv->event_wait); |
| 251 | priv->event_space = 4096; /* set aside 4k for event buffer */ |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 252 | |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 253 | if (dev->driver->driver_features & DRIVER_GEM) |
| 254 | drm_gem_open(dev, priv); |
| 255 | |
Dave Airlie | 3248877 | 2011-11-25 15:21:02 +0000 | [diff] [blame] | 256 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
| 257 | drm_prime_init_file_private(&priv->prime); |
| 258 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 259 | if (dev->driver->open) { |
| 260 | ret = dev->driver->open(dev, priv); |
| 261 | if (ret < 0) |
Seung-Woo Kim | df9b6a9 | 2013-07-02 09:53:28 +0900 | [diff] [blame] | 262 | goto out_prime_destroy; |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 263 | } |
| 264 | |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 265 | /* if there is no current master make this fd it, but do not create |
| 266 | * any master object for render clients */ |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 267 | mutex_lock(&dev->struct_mutex); |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 268 | if (!priv->minor->master && !drm_is_render_client(priv)) { |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 269 | /* create a new master */ |
| 270 | priv->minor->master = drm_master_create(priv->minor); |
| 271 | if (!priv->minor->master) { |
Dan Carpenter | dba5ed0 | 2009-03-27 13:34:28 +0300 | [diff] [blame] | 272 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 273 | ret = -ENOMEM; |
Seung-Woo Kim | df9b6a9 | 2013-07-02 09:53:28 +0900 | [diff] [blame] | 274 | goto out_close; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | priv->is_master = 1; |
| 278 | /* take another reference for the copy in the local file priv */ |
| 279 | priv->master = drm_master_get(priv->minor->master); |
| 280 | |
| 281 | priv->authenticated = 1; |
| 282 | |
| 283 | mutex_unlock(&dev->struct_mutex); |
| 284 | if (dev->driver->master_create) { |
| 285 | ret = dev->driver->master_create(dev, priv->master); |
| 286 | if (ret) { |
| 287 | mutex_lock(&dev->struct_mutex); |
| 288 | /* drop both references if this fails */ |
| 289 | drm_master_put(&priv->minor->master); |
| 290 | drm_master_put(&priv->master); |
| 291 | mutex_unlock(&dev->struct_mutex); |
Seung-Woo Kim | df9b6a9 | 2013-07-02 09:53:28 +0900 | [diff] [blame] | 292 | goto out_close; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 293 | } |
| 294 | } |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 295 | mutex_lock(&dev->struct_mutex); |
| 296 | if (dev->driver->master_set) { |
| 297 | ret = dev->driver->master_set(dev, priv, true); |
| 298 | if (ret) { |
| 299 | /* drop both references if this fails */ |
| 300 | drm_master_put(&priv->minor->master); |
| 301 | drm_master_put(&priv->master); |
| 302 | mutex_unlock(&dev->struct_mutex); |
Seung-Woo Kim | df9b6a9 | 2013-07-02 09:53:28 +0900 | [diff] [blame] | 303 | goto out_close; |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 304 | } |
| 305 | } |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 306 | } else if (!drm_is_render_client(priv)) { |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 307 | /* get a reference to the master */ |
| 308 | priv->master = drm_master_get(priv->minor->master); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 309 | } |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 310 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 311 | |
| 312 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 313 | list_add(&priv->lhead, &dev->filelist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 314 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 315 | |
| 316 | #ifdef __alpha__ |
| 317 | /* |
| 318 | * Default the hose |
| 319 | */ |
| 320 | if (!dev->hose) { |
| 321 | struct pci_dev *pci_dev; |
| 322 | pci_dev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); |
| 323 | if (pci_dev) { |
| 324 | dev->hose = pci_dev->sysdata; |
| 325 | pci_dev_put(pci_dev); |
| 326 | } |
| 327 | if (!dev->hose) { |
| 328 | struct pci_bus *b = pci_bus_b(pci_root_buses.next); |
| 329 | if (b) |
| 330 | dev->hose = b->sysdata; |
| 331 | } |
| 332 | } |
| 333 | #endif |
| 334 | |
| 335 | return 0; |
Seung-Woo Kim | df9b6a9 | 2013-07-02 09:53:28 +0900 | [diff] [blame] | 336 | |
| 337 | out_close: |
| 338 | if (dev->driver->postclose) |
| 339 | dev->driver->postclose(dev, priv); |
| 340 | out_prime_destroy: |
| 341 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
| 342 | drm_prime_destroy_file_private(&priv->prime); |
| 343 | if (dev->driver->driver_features & DRIVER_GEM) |
| 344 | drm_gem_release(dev, priv); |
| 345 | out_put_pid: |
| 346 | put_pid(priv->pid); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 347 | kfree(priv); |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 348 | filp->private_data = NULL; |
| 349 | return ret; |
| 350 | } |
| 351 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 352 | static void drm_master_release(struct drm_device *dev, struct file *filp) |
| 353 | { |
| 354 | struct drm_file *file_priv = filp->private_data; |
| 355 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 356 | if (drm_i_have_hw_lock(dev, file_priv)) { |
| 357 | DRM_DEBUG("File %p released, freeing lock for context %d\n", |
| 358 | filp, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); |
| 359 | drm_lock_free(&file_priv->master->lock, |
| 360 | _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock)); |
| 361 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 362 | } |
| 363 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 364 | static void drm_events_release(struct drm_file *file_priv) |
| 365 | { |
| 366 | struct drm_device *dev = file_priv->minor->dev; |
| 367 | struct drm_pending_event *e, *et; |
| 368 | struct drm_pending_vblank_event *v, *vt; |
| 369 | unsigned long flags; |
| 370 | |
| 371 | spin_lock_irqsave(&dev->event_lock, flags); |
| 372 | |
| 373 | /* Remove pending flips */ |
| 374 | list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link) |
| 375 | if (v->base.file_priv == file_priv) { |
| 376 | list_del(&v->base.link); |
| 377 | drm_vblank_put(dev, v->pipe); |
| 378 | v->base.destroy(&v->base); |
| 379 | } |
| 380 | |
| 381 | /* Remove unconsumed events */ |
YoungJun Cho | 1dda680 | 2013-10-29 20:30:26 +0900 | [diff] [blame] | 382 | list_for_each_entry_safe(e, et, &file_priv->event_list, link) { |
| 383 | list_del(&e->link); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 384 | e->destroy(e); |
YoungJun Cho | 1dda680 | 2013-10-29 20:30:26 +0900 | [diff] [blame] | 385 | } |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 386 | |
| 387 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 388 | } |
| 389 | |
Dave Airlie | d985c10 | 2006-01-02 21:32:48 +1100 | [diff] [blame] | 390 | /** |
David Herrmann | 1c8887d | 2013-10-02 11:23:36 +0200 | [diff] [blame] | 391 | * drm_legacy_dev_reinit |
| 392 | * |
| 393 | * Reinitializes a legacy/ums drm device in it's lastclose function. |
| 394 | */ |
| 395 | static void drm_legacy_dev_reinit(struct drm_device *dev) |
| 396 | { |
David Herrmann | 1c8887d | 2013-10-02 11:23:36 +0200 | [diff] [blame] | 397 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 398 | return; |
| 399 | |
| 400 | atomic_set(&dev->ioctl_count, 0); |
| 401 | atomic_set(&dev->vma_count, 0); |
| 402 | |
David Herrmann | 1c8887d | 2013-10-02 11:23:36 +0200 | [diff] [blame] | 403 | dev->sigdata.lock = NULL; |
| 404 | |
| 405 | dev->context_flag = 0; |
| 406 | dev->last_context = 0; |
| 407 | dev->if_version = 0; |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * Take down the DRM device. |
| 412 | * |
| 413 | * \param dev DRM device structure. |
| 414 | * |
| 415 | * Frees every resource in \p dev. |
| 416 | * |
| 417 | * \sa drm_device |
| 418 | */ |
| 419 | int drm_lastclose(struct drm_device * dev) |
| 420 | { |
| 421 | struct drm_vma_entry *vma, *vma_temp; |
| 422 | |
| 423 | DRM_DEBUG("\n"); |
| 424 | |
| 425 | if (dev->driver->lastclose) |
| 426 | dev->driver->lastclose(dev); |
| 427 | DRM_DEBUG("driver lastclose completed\n"); |
| 428 | |
| 429 | if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) |
| 430 | drm_irq_uninstall(dev); |
| 431 | |
| 432 | mutex_lock(&dev->struct_mutex); |
| 433 | |
| 434 | drm_agp_clear(dev); |
| 435 | |
| 436 | drm_legacy_sg_cleanup(dev); |
| 437 | |
| 438 | /* Clear vma list (only built for debugging) */ |
| 439 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { |
| 440 | list_del(&vma->head); |
| 441 | kfree(vma); |
| 442 | } |
| 443 | |
| 444 | drm_legacy_dma_takedown(dev); |
| 445 | |
| 446 | dev->dev_mapping = NULL; |
| 447 | mutex_unlock(&dev->struct_mutex); |
| 448 | |
| 449 | drm_legacy_dev_reinit(dev); |
| 450 | |
| 451 | DRM_DEBUG("lastclose completed\n"); |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | * Release file. |
| 457 | * |
| 458 | * \param inode device inode |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 459 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | * \return zero on success or a negative number on failure. |
| 461 | * |
| 462 | * If the hardware lock is held then free it, and take it again for the kernel |
| 463 | * context since it's necessary to reclaim buffers. Unlink the file private |
| 464 | * data from its list and free it. Decreases the open count and if it reaches |
Dave Airlie | 22eae94 | 2005-11-10 22:16:34 +1100 | [diff] [blame] | 465 | * zero calls drm_lastclose(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 467 | int drm_release(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | { |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 469 | struct drm_file *file_priv = filp->private_data; |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 470 | struct drm_device *dev = file_priv->minor->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | int retcode = 0; |
| 472 | |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 473 | mutex_lock(&drm_global_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 475 | DRM_DEBUG("open_count = %d\n", dev->open_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Dave Airlie | 22eae94 | 2005-11-10 22:16:34 +1100 | [diff] [blame] | 477 | if (dev->driver->preclose) |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 478 | dev->driver->preclose(dev, file_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | /* ======================================================== |
| 481 | * Begin inline drm_release |
| 482 | */ |
| 483 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 484 | DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", |
Pavel Emelyanov | ba25f9d | 2007-10-18 23:40:40 -0700 | [diff] [blame] | 485 | task_pid_nr(current), |
Dave Airlie | 2c14f28 | 2008-04-21 16:47:32 +1000 | [diff] [blame] | 486 | (long)old_encode_dev(file_priv->minor->device), |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 487 | dev->open_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
Thomas Hellstrom | 598781d | 2012-01-24 18:54:21 +0100 | [diff] [blame] | 489 | /* Release any auth tokens that might point to this file_priv, |
| 490 | (do that under the drm_global_mutex) */ |
| 491 | if (file_priv->magic) |
| 492 | (void) drm_remove_magic(file_priv->master, file_priv->magic); |
| 493 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 494 | /* if the master has gone away we can't do anything with the lock */ |
| 495 | if (file_priv->minor->master) |
| 496 | drm_master_release(dev, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | |
Daniel Vetter | 67cb4b4 | 2011-10-26 00:31:26 +0200 | [diff] [blame] | 498 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 499 | drm_core_reclaim_buffers(dev, file_priv); |
| 500 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 501 | drm_events_release(file_priv); |
| 502 | |
Kristian Høgsberg | ea39f83 | 2009-02-12 14:37:56 -0500 | [diff] [blame] | 503 | if (dev->driver->driver_features & DRIVER_MODESET) |
| 504 | drm_fb_release(file_priv); |
| 505 | |
Prathyush | 4e47e02 | 2012-04-14 17:22:13 +0530 | [diff] [blame] | 506 | if (dev->driver->driver_features & DRIVER_GEM) |
| 507 | drm_gem_release(dev, file_priv); |
| 508 | |
Dave Airlie | c21eb21 | 2013-09-20 08:32:59 +1000 | [diff] [blame] | 509 | mutex_lock(&dev->ctxlist_mutex); |
| 510 | if (!list_empty(&dev->ctxlist)) { |
| 511 | struct drm_ctx_list *pos, *n; |
| 512 | |
| 513 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
| 514 | if (pos->tag == file_priv && |
| 515 | pos->handle != DRM_KERNEL_CONTEXT) { |
| 516 | if (dev->driver->context_dtor) |
| 517 | dev->driver->context_dtor(dev, |
| 518 | pos->handle); |
| 519 | |
| 520 | drm_ctxbitmap_free(dev, pos->handle); |
| 521 | |
| 522 | list_del(&pos->head); |
| 523 | kfree(pos); |
Dave Airlie | c21eb21 | 2013-09-20 08:32:59 +1000 | [diff] [blame] | 524 | } |
| 525 | } |
| 526 | } |
| 527 | mutex_unlock(&dev->ctxlist_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 529 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 530 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 531 | if (file_priv->is_master) { |
Thomas Hellstrom | fda714c | 2009-03-02 11:10:56 +0100 | [diff] [blame] | 532 | struct drm_master *master = file_priv->master; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 533 | struct drm_file *temp; |
| 534 | list_for_each_entry(temp, &dev->filelist, lhead) { |
| 535 | if ((temp->master == file_priv->master) && |
| 536 | (temp != file_priv)) |
Chris Wilson | 1020dc6 | 2013-10-29 08:55:57 +0000 | [diff] [blame^] | 537 | temp->authenticated = temp->always_authenticated; |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 538 | } |
| 539 | |
Thomas Hellstrom | fda714c | 2009-03-02 11:10:56 +0100 | [diff] [blame] | 540 | /** |
| 541 | * Since the master is disappearing, so is the |
| 542 | * possibility to lock. |
| 543 | */ |
| 544 | |
| 545 | if (master->lock.hw_lock) { |
| 546 | if (dev->sigdata.lock == master->lock.hw_lock) |
| 547 | dev->sigdata.lock = NULL; |
| 548 | master->lock.hw_lock = NULL; |
| 549 | master->lock.file_priv = NULL; |
| 550 | wake_up_interruptible_all(&master->lock.lock_queue); |
| 551 | } |
| 552 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 553 | if (file_priv->minor->master == file_priv->master) { |
| 554 | /* drop the reference held my the minor */ |
Thomas Hellstrom | 862302f | 2009-12-02 18:15:25 +0000 | [diff] [blame] | 555 | if (dev->driver->master_drop) |
| 556 | dev->driver->master_drop(dev, file_priv, true); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 557 | drm_master_put(&file_priv->minor->master); |
| 558 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 560 | |
Ilija Hadzic | 949c4a3 | 2012-05-15 16:40:10 -0400 | [diff] [blame] | 561 | BUG_ON(dev->dev_mapping == NULL); |
| 562 | iput(container_of(dev->dev_mapping, struct inode, i_data)); |
| 563 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 564 | /* drop the reference held my the file priv */ |
David Herrmann | 1793126 | 2013-08-25 18:29:00 +0200 | [diff] [blame] | 565 | if (file_priv->master) |
| 566 | drm_master_put(&file_priv->master); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 567 | file_priv->is_master = 0; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 568 | list_del(&file_priv->lhead); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 569 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 570 | |
Dave Airlie | 22eae94 | 2005-11-10 22:16:34 +1100 | [diff] [blame] | 571 | if (dev->driver->postclose) |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 572 | dev->driver->postclose(dev, file_priv); |
Dave Airlie | 3248877 | 2011-11-25 15:21:02 +0000 | [diff] [blame] | 573 | |
Daniel Vetter | 319c933 | 2013-08-15 00:02:46 +0200 | [diff] [blame] | 574 | |
Dave Airlie | 3248877 | 2011-11-25 15:21:02 +0000 | [diff] [blame] | 575 | if (drm_core_check_feature(dev, DRIVER_PRIME)) |
| 576 | drm_prime_destroy_file_private(&file_priv->prime); |
| 577 | |
Eric W. Biederman | 5fce5e0 | 2012-02-07 16:47:26 -0800 | [diff] [blame] | 578 | put_pid(file_priv->pid); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 579 | kfree(file_priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
| 581 | /* ======================================================== |
| 582 | * End inline drm_release |
| 583 | */ |
| 584 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 585 | if (!--dev->open_count) { |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 586 | if (atomic_read(&dev->ioctl_count)) { |
| 587 | DRM_ERROR("Device busy: %d\n", |
| 588 | atomic_read(&dev->ioctl_count)); |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 589 | retcode = -EBUSY; |
Chris Wilson | 1a72d65 | 2010-08-11 14:41:16 +0100 | [diff] [blame] | 590 | } else |
| 591 | retcode = drm_lastclose(dev); |
Dave Airlie | 2c07a21 | 2012-02-20 14:18:07 +0000 | [diff] [blame] | 592 | if (drm_device_is_unplugged(dev)) |
| 593 | drm_put_dev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
Arnd Bergmann | 5837471 | 2010-07-10 23:51:39 +0200 | [diff] [blame] | 595 | mutex_unlock(&drm_global_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
| 597 | return retcode; |
| 598 | } |
| 599 | EXPORT_SYMBOL(drm_release); |
| 600 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 601 | static bool |
| 602 | drm_dequeue_event(struct drm_file *file_priv, |
| 603 | size_t total, size_t max, struct drm_pending_event **out) |
| 604 | { |
| 605 | struct drm_device *dev = file_priv->minor->dev; |
| 606 | struct drm_pending_event *e; |
| 607 | unsigned long flags; |
| 608 | bool ret = false; |
| 609 | |
| 610 | spin_lock_irqsave(&dev->event_lock, flags); |
| 611 | |
| 612 | *out = NULL; |
| 613 | if (list_empty(&file_priv->event_list)) |
| 614 | goto out; |
| 615 | e = list_first_entry(&file_priv->event_list, |
| 616 | struct drm_pending_event, link); |
| 617 | if (e->event->length + total > max) |
| 618 | goto out; |
| 619 | |
| 620 | file_priv->event_space += e->event->length; |
| 621 | list_del(&e->link); |
| 622 | *out = e; |
| 623 | ret = true; |
| 624 | |
| 625 | out: |
| 626 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 627 | return ret; |
| 628 | } |
| 629 | |
| 630 | ssize_t drm_read(struct file *filp, char __user *buffer, |
| 631 | size_t count, loff_t *offset) |
| 632 | { |
| 633 | struct drm_file *file_priv = filp->private_data; |
| 634 | struct drm_pending_event *e; |
| 635 | size_t total; |
| 636 | ssize_t ret; |
| 637 | |
| 638 | ret = wait_event_interruptible(file_priv->event_wait, |
| 639 | !list_empty(&file_priv->event_list)); |
| 640 | if (ret < 0) |
| 641 | return ret; |
| 642 | |
| 643 | total = 0; |
| 644 | while (drm_dequeue_event(file_priv, total, count, &e)) { |
| 645 | if (copy_to_user(buffer + total, |
| 646 | e->event, e->event->length)) { |
| 647 | total = -EFAULT; |
| 648 | break; |
| 649 | } |
| 650 | |
| 651 | total += e->event->length; |
| 652 | e->destroy(e); |
| 653 | } |
| 654 | |
| 655 | return total; |
| 656 | } |
| 657 | EXPORT_SYMBOL(drm_read); |
| 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait) |
| 660 | { |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 661 | struct drm_file *file_priv = filp->private_data; |
| 662 | unsigned int mask = 0; |
| 663 | |
| 664 | poll_wait(filp, &file_priv->event_wait, wait); |
| 665 | |
| 666 | if (!list_empty(&file_priv->event_list)) |
| 667 | mask |= POLLIN | POLLRDNORM; |
| 668 | |
| 669 | return mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 671 | EXPORT_SYMBOL(drm_poll); |