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_context.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * IOCTLs for generic contexts |
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 Gareth Hughes <gareth@valinux.com> |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * Created: Fri Nov 24 18:31:37 2000 by gareth@valinux.com |
| 11 | * |
| 12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| 13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 14 | * All Rights Reserved. |
| 15 | * |
| 16 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 17 | * copy of this software and associated documentation files (the "Software"), |
| 18 | * to deal in the Software without restriction, including without limitation |
| 19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 20 | * and/or sell copies of the Software, and to permit persons to whom the |
| 21 | * Software is furnished to do so, subject to the following conditions: |
| 22 | * |
| 23 | * The above copyright notice and this permission notice (including the next |
| 24 | * paragraph) shall be included in all copies or substantial portions of the |
| 25 | * Software. |
| 26 | * |
| 27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 33 | * OTHER DEALINGS IN THE SOFTWARE. |
| 34 | */ |
| 35 | |
| 36 | /* |
| 37 | * ChangeLog: |
| 38 | * 2001-11-16 Torsten Duwe <duwe@caldera.de> |
| 39 | * added context constructor/destructor hooks, |
| 40 | * needed by SiS driver's memory management. |
| 41 | */ |
| 42 | |
| 43 | #include "drmP.h" |
| 44 | |
| 45 | /******************************************************************/ |
| 46 | /** \name Context bitmap support */ |
| 47 | /*@{*/ |
| 48 | |
| 49 | /** |
| 50 | * Free a handle from the context bitmap. |
| 51 | * |
| 52 | * \param dev DRM device. |
| 53 | * \param ctx_handle context handle. |
| 54 | * |
| 55 | * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 56 | * in drm_device::ctx_idr, while holding the drm_device::struct_mutex |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | * lock. |
| 58 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 59 | void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | { |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 61 | mutex_lock(&dev->struct_mutex); |
| 62 | idr_remove(&dev->ctx_idr, ctx_handle); |
| 63 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
| 65 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 66 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | * Context bitmap allocation. |
| 68 | * |
| 69 | * \param dev DRM device. |
| 70 | * \return (non-negative) context handle on success or a negative number on failure. |
| 71 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 72 | * Allocate a new idr from drm_device::ctx_idr while holding the |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 73 | * drm_device::struct_mutex lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 75 | static int drm_ctxbitmap_next(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 77 | int new_id; |
| 78 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 80 | again: |
| 81 | if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) { |
| 82 | DRM_ERROR("Out of memory expanding drawable idr\n"); |
| 83 | return -ENOMEM; |
| 84 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 85 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 86 | ret = idr_get_new_above(&dev->ctx_idr, NULL, |
| 87 | DRM_RESERVED_CONTEXTS, &new_id); |
| 88 | if (ret == -EAGAIN) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 89 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 90 | goto again; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 92 | mutex_unlock(&dev->struct_mutex); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 93 | return new_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Context bitmap initialization. |
| 98 | * |
| 99 | * \param dev DRM device. |
| 100 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 101 | * Initialise the drm_device::ctx_idr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 103 | int drm_ctxbitmap_init(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | { |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 105 | idr_init(&dev->ctx_idr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Context bitmap cleanup. |
| 111 | * |
| 112 | * \param dev DRM device. |
| 113 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 114 | * Free all idr members using drm_ctx_sarea_free helper function |
| 115 | * while holding the drm_device::struct_mutex lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 117 | void drm_ctxbitmap_cleanup(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 119 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 120 | idr_remove_all(&dev->ctx_idr); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 121 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | /*@}*/ |
| 125 | |
| 126 | /******************************************************************/ |
| 127 | /** \name Per Context SAREA Support */ |
| 128 | /*@{*/ |
| 129 | |
| 130 | /** |
| 131 | * Get per-context SAREA. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 132 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | * \param inode device inode. |
| 134 | * \param filp file pointer. |
| 135 | * \param cmd command. |
| 136 | * \param arg user argument pointing to a drm_ctx_priv_map structure. |
| 137 | * \return zero on success or a negative number on failure. |
| 138 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 139 | * Gets the map from drm_device::ctx_idr with the handle specified and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | * returns its handle. |
| 141 | */ |
| 142 | int drm_getsareactx(struct inode *inode, struct file *filp, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 143 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 145 | struct drm_file *priv = filp->private_data; |
| 146 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 147 | struct drm_ctx_priv_map __user *argp = (void __user *)arg; |
| 148 | struct drm_ctx_priv_map request; |
| 149 | struct drm_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 150 | struct drm_map_list *_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | if (copy_from_user(&request, argp, sizeof(request))) |
| 153 | return -EFAULT; |
| 154 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 155 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 156 | |
| 157 | map = idr_find(&dev->ctx_idr, request.ctx_id); |
| 158 | if (!map) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 159 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | return -EINVAL; |
| 161 | } |
| 162 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 163 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Dave Airlie | b3a8363 | 2005-09-30 18:37:36 +1000 | [diff] [blame] | 165 | request.handle = NULL; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 166 | list_for_each_entry(_entry, &dev->maplist, head) { |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 167 | if (_entry->map == map) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 168 | request.handle = |
| 169 | (void *)(unsigned long)_entry->user_token; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 170 | break; |
| 171 | } |
| 172 | } |
Dave Airlie | b3a8363 | 2005-09-30 18:37:36 +1000 | [diff] [blame] | 173 | if (request.handle == NULL) |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 174 | return -EINVAL; |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | if (copy_to_user(argp, &request, sizeof(request))) |
| 177 | return -EFAULT; |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Set per-context SAREA. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 183 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | * \param inode device inode. |
| 185 | * \param filp file pointer. |
| 186 | * \param cmd command. |
| 187 | * \param arg user argument pointing to a drm_ctx_priv_map structure. |
| 188 | * \return zero on success or a negative number on failure. |
| 189 | * |
| 190 | * Searches the mapping specified in \p arg and update the entry in |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 191 | * drm_device::ctx_idr with it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | */ |
| 193 | int drm_setsareactx(struct inode *inode, struct file *filp, |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 194 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 196 | struct drm_file *priv = filp->private_data; |
| 197 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 198 | struct drm_ctx_priv_map request; |
| 199 | struct drm_map *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 200 | struct drm_map_list *r_list = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | if (copy_from_user(&request, |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 203 | (struct drm_ctx_priv_map __user *) arg, |
| 204 | sizeof(request))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | return -EFAULT; |
| 206 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 207 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 208 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | 9a18664 | 2005-06-23 21:29:18 +1000 | [diff] [blame] | 209 | if (r_list->map |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 210 | && r_list->user_token == (unsigned long)request.handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | goto found; |
| 212 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 213 | bad: |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 214 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | return -EINVAL; |
| 216 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 217 | found: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | map = r_list->map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 219 | if (!map) |
| 220 | goto bad; |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 221 | |
| 222 | if (IS_ERR(idr_replace(&dev->ctx_idr, map, request.ctx_id))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | goto bad; |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame^] | 224 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 225 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | /*@}*/ |
| 230 | |
| 231 | /******************************************************************/ |
| 232 | /** \name The actual DRM context handling routines */ |
| 233 | /*@{*/ |
| 234 | |
| 235 | /** |
| 236 | * Switch context. |
| 237 | * |
| 238 | * \param dev DRM device. |
| 239 | * \param old old context handle. |
| 240 | * \param new new context handle. |
| 241 | * \return zero on success or a negative number on failure. |
| 242 | * |
| 243 | * Attempt to set drm_device::context_flag. |
| 244 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 245 | static int drm_context_switch(struct drm_device * dev, int old, int new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 247 | if (test_and_set_bit(0, &dev->context_flag)) { |
| 248 | DRM_ERROR("Reentering -- FIXME\n"); |
| 249 | return -EBUSY; |
| 250 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 252 | DRM_DEBUG("Context switch from %d to %d\n", old, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 254 | if (new == dev->last_context) { |
| 255 | clear_bit(0, &dev->context_flag); |
| 256 | return 0; |
| 257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 259 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | /** |
| 263 | * Complete context switch. |
| 264 | * |
| 265 | * \param dev DRM device. |
| 266 | * \param new new context handle. |
| 267 | * \return zero on success or a negative number on failure. |
| 268 | * |
| 269 | * Updates drm_device::last_context and drm_device::last_switch. Verifies the |
| 270 | * hardware lock is held, clears the drm_device::context_flag and wakes up |
| 271 | * drm_device::context_wait. |
| 272 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 273 | static int drm_context_switch_complete(struct drm_device * dev, int new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 275 | dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ |
| 276 | dev->last_switch = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 278 | if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) { |
| 279 | DRM_ERROR("Lock isn't held after context switch\n"); |
| 280 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 282 | /* If a context switch is ever initiated |
| 283 | when the kernel holds the lock, release |
| 284 | that lock here. */ |
| 285 | clear_bit(0, &dev->context_flag); |
| 286 | wake_up(&dev->context_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 288 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Reserve contexts. |
| 293 | * |
| 294 | * \param inode device inode. |
| 295 | * \param filp file pointer. |
| 296 | * \param cmd command. |
| 297 | * \param arg user argument pointing to a drm_ctx_res structure. |
| 298 | * \return zero on success or a negative number on failure. |
| 299 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 300 | int drm_resctx(struct inode *inode, struct file *filp, |
| 301 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 303 | struct drm_ctx_res res; |
| 304 | struct drm_ctx_res __user *argp = (void __user *)arg; |
| 305 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | int i; |
| 307 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 308 | if (copy_from_user(&res, argp, sizeof(res))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | return -EFAULT; |
| 310 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 311 | if (res.count >= DRM_RESERVED_CONTEXTS) { |
| 312 | memset(&ctx, 0, sizeof(ctx)); |
| 313 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | ctx.handle = i; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 315 | if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | return -EFAULT; |
| 317 | } |
| 318 | } |
| 319 | res.count = DRM_RESERVED_CONTEXTS; |
| 320 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 321 | if (copy_to_user(argp, &res, sizeof(res))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | return -EFAULT; |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * Add context. |
| 328 | * |
| 329 | * \param inode device inode. |
| 330 | * \param filp file pointer. |
| 331 | * \param cmd command. |
| 332 | * \param arg user argument pointing to a drm_ctx structure. |
| 333 | * \return zero on success or a negative number on failure. |
| 334 | * |
| 335 | * Get a new handle for the context and copy to userspace. |
| 336 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 337 | int drm_addctx(struct inode *inode, struct file *filp, |
| 338 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 340 | struct drm_file *priv = filp->private_data; |
| 341 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 342 | struct drm_ctx_list *ctx_entry; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 343 | struct drm_ctx __user *argp = (void __user *)arg; |
| 344 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 346 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | return -EFAULT; |
| 348 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 349 | ctx.handle = drm_ctxbitmap_next(dev); |
| 350 | if (ctx.handle == DRM_KERNEL_CONTEXT) { |
| 351 | /* Skip kernel's context and get a new one. */ |
| 352 | ctx.handle = drm_ctxbitmap_next(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 354 | DRM_DEBUG("%d\n", ctx.handle); |
| 355 | if (ctx.handle == -1) { |
| 356 | DRM_DEBUG("Not enough free contexts.\n"); |
| 357 | /* Should this return -EBUSY instead? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | return -ENOMEM; |
| 359 | } |
| 360 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 361 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | if (dev->driver->context_ctor) |
Dave Airlie | 1e7d519 | 2006-01-02 19:25:35 +1100 | [diff] [blame] | 363 | if (!dev->driver->context_ctor(dev, ctx.handle)) { |
Dave Airlie | b5e9fc1 | 2006-01-02 19:23:44 +1100 | [diff] [blame] | 364 | DRM_DEBUG("Running out of ctxs or memory.\n"); |
| 365 | return -ENOMEM; |
| 366 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | } |
| 368 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 369 | ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST); |
| 370 | if (!ctx_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | DRM_DEBUG("out of memory\n"); |
| 372 | return -ENOMEM; |
| 373 | } |
| 374 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 375 | INIT_LIST_HEAD(&ctx_entry->head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | ctx_entry->handle = ctx.handle; |
| 377 | ctx_entry->tag = priv; |
| 378 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 379 | mutex_lock(&dev->ctxlist_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 380 | list_add(&ctx_entry->head, &dev->ctxlist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | ++dev->ctx_count; |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 382 | mutex_unlock(&dev->ctxlist_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 384 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | return -EFAULT; |
| 386 | return 0; |
| 387 | } |
| 388 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 389 | int drm_modctx(struct inode *inode, struct file *filp, |
| 390 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
| 392 | /* This does nothing */ |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Get context. |
| 398 | * |
| 399 | * \param inode device inode. |
| 400 | * \param filp file pointer. |
| 401 | * \param cmd command. |
| 402 | * \param arg user argument pointing to a drm_ctx structure. |
| 403 | * \return zero on success or a negative number on failure. |
| 404 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 405 | int drm_getctx(struct inode *inode, struct file *filp, |
| 406 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 408 | struct drm_ctx __user *argp = (void __user *)arg; |
| 409 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 411 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | return -EFAULT; |
| 413 | |
| 414 | /* This is 0, because we don't handle any context flags */ |
| 415 | ctx.flags = 0; |
| 416 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 417 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return -EFAULT; |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * Switch context. |
| 424 | * |
| 425 | * \param inode device inode. |
| 426 | * \param filp file pointer. |
| 427 | * \param cmd command. |
| 428 | * \param arg user argument pointing to a drm_ctx structure. |
| 429 | * \return zero on success or a negative number on failure. |
| 430 | * |
| 431 | * Calls context_switch(). |
| 432 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 433 | int drm_switchctx(struct inode *inode, struct file *filp, |
| 434 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 436 | struct drm_file *priv = filp->private_data; |
| 437 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 438 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 440 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | return -EFAULT; |
| 442 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 443 | DRM_DEBUG("%d\n", ctx.handle); |
| 444 | return drm_context_switch(dev, dev->last_context, ctx.handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
| 447 | /** |
| 448 | * New context. |
| 449 | * |
| 450 | * \param inode device inode. |
| 451 | * \param filp file pointer. |
| 452 | * \param cmd command. |
| 453 | * \param arg user argument pointing to a drm_ctx structure. |
| 454 | * \return zero on success or a negative number on failure. |
| 455 | * |
| 456 | * Calls context_switch_complete(). |
| 457 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 458 | int drm_newctx(struct inode *inode, struct file *filp, |
| 459 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 461 | struct drm_file *priv = filp->private_data; |
| 462 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 463 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 465 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | return -EFAULT; |
| 467 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 468 | DRM_DEBUG("%d\n", ctx.handle); |
| 469 | drm_context_switch_complete(dev, ctx.handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * Remove context. |
| 476 | * |
| 477 | * \param inode device inode. |
| 478 | * \param filp file pointer. |
| 479 | * \param cmd command. |
| 480 | * \param arg user argument pointing to a drm_ctx structure. |
| 481 | * \return zero on success or a negative number on failure. |
| 482 | * |
| 483 | * If not the special kernel context, calls ctxbitmap_free() to free the specified context. |
| 484 | */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 485 | int drm_rmctx(struct inode *inode, struct file *filp, |
| 486 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 488 | struct drm_file *priv = filp->private_data; |
| 489 | struct drm_device *dev = priv->head->dev; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 490 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 492 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | return -EFAULT; |
| 494 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 495 | DRM_DEBUG("%d\n", ctx.handle); |
| 496 | if (ctx.handle == DRM_KERNEL_CONTEXT + 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | priv->remove_auth_on_close = 1; |
| 498 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 499 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | if (dev->driver->context_dtor) |
| 501 | dev->driver->context_dtor(dev, ctx.handle); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 502 | drm_ctxbitmap_free(dev, ctx.handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |
| 504 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 505 | mutex_lock(&dev->ctxlist_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 506 | if (!list_empty(&dev->ctxlist)) { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 507 | struct drm_ctx_list *pos, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 509 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 510 | if (pos->handle == ctx.handle) { |
| 511 | list_del(&pos->head); |
| 512 | drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | --dev->ctx_count; |
| 514 | } |
| 515 | } |
| 516 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 517 | mutex_unlock(&dev->ctxlist_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | /*@}*/ |