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Commit | Line | Data |
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1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_context.c |
1da177e4 | 3 | * IOCTLs for generic contexts |
b5e89ed5 | 4 | * |
1da177e4 LT |
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 | |
62968144 | 56 | * in drm_device::ctx_idr, while holding the drm_device::struct_mutex |
1da177e4 LT |
57 | * lock. |
58 | */ | |
84b1fd10 | 59 | void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle) |
1da177e4 | 60 | { |
62968144 DA |
61 | mutex_lock(&dev->struct_mutex); |
62 | idr_remove(&dev->ctx_idr, ctx_handle); | |
63 | mutex_unlock(&dev->struct_mutex); | |
1da177e4 LT |
64 | } |
65 | ||
b5e89ed5 | 66 | /** |
1da177e4 LT |
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 | * | |
62968144 | 72 | * Allocate a new idr from drm_device::ctx_idr while holding the |
30e2fb18 | 73 | * drm_device::struct_mutex lock. |
1da177e4 | 74 | */ |
84b1fd10 | 75 | static int drm_ctxbitmap_next(struct drm_device * dev) |
1da177e4 | 76 | { |
62968144 DA |
77 | int new_id; |
78 | int ret; | |
1da177e4 | 79 | |
62968144 DA |
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 | } | |
30e2fb18 | 85 | mutex_lock(&dev->struct_mutex); |
62968144 DA |
86 | ret = idr_get_new_above(&dev->ctx_idr, NULL, |
87 | DRM_RESERVED_CONTEXTS, &new_id); | |
88 | if (ret == -EAGAIN) { | |
30e2fb18 | 89 | mutex_unlock(&dev->struct_mutex); |
62968144 | 90 | goto again; |
1da177e4 | 91 | } |
30e2fb18 | 92 | mutex_unlock(&dev->struct_mutex); |
62968144 | 93 | return new_id; |
1da177e4 LT |
94 | } |
95 | ||
96 | /** | |
97 | * Context bitmap initialization. | |
98 | * | |
99 | * \param dev DRM device. | |
100 | * | |
62968144 | 101 | * Initialise the drm_device::ctx_idr |
1da177e4 | 102 | */ |
84b1fd10 | 103 | int drm_ctxbitmap_init(struct drm_device * dev) |
1da177e4 | 104 | { |
62968144 | 105 | idr_init(&dev->ctx_idr); |
1da177e4 LT |
106 | return 0; |
107 | } | |
108 | ||
109 | /** | |
110 | * Context bitmap cleanup. | |
111 | * | |
112 | * \param dev DRM device. | |
113 | * | |
62968144 DA |
114 | * Free all idr members using drm_ctx_sarea_free helper function |
115 | * while holding the drm_device::struct_mutex lock. | |
1da177e4 | 116 | */ |
84b1fd10 | 117 | void drm_ctxbitmap_cleanup(struct drm_device * dev) |
1da177e4 | 118 | { |
30e2fb18 | 119 | mutex_lock(&dev->struct_mutex); |
62968144 | 120 | idr_remove_all(&dev->ctx_idr); |
30e2fb18 | 121 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
122 | } |
123 | ||
124 | /*@}*/ | |
125 | ||
126 | /******************************************************************/ | |
127 | /** \name Per Context SAREA Support */ | |
128 | /*@{*/ | |
129 | ||
130 | /** | |
131 | * Get per-context SAREA. | |
b5e89ed5 | 132 | * |
1da177e4 LT |
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 | * | |
62968144 | 139 | * Gets the map from drm_device::ctx_idr with the handle specified and |
1da177e4 LT |
140 | * returns its handle. |
141 | */ | |
142 | int drm_getsareactx(struct inode *inode, struct file *filp, | |
b5e89ed5 | 143 | unsigned int cmd, unsigned long arg) |
1da177e4 | 144 | { |
84b1fd10 DA |
145 | struct drm_file *priv = filp->private_data; |
146 | struct drm_device *dev = priv->head->dev; | |
c60ce623 DA |
147 | struct drm_ctx_priv_map __user *argp = (void __user *)arg; |
148 | struct drm_ctx_priv_map request; | |
149 | struct drm_map *map; | |
55910517 | 150 | struct drm_map_list *_entry; |
1da177e4 LT |
151 | |
152 | if (copy_from_user(&request, argp, sizeof(request))) | |
153 | return -EFAULT; | |
154 | ||
30e2fb18 | 155 | mutex_lock(&dev->struct_mutex); |
62968144 DA |
156 | |
157 | map = idr_find(&dev->ctx_idr, request.ctx_id); | |
158 | if (!map) { | |
30e2fb18 | 159 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
160 | return -EINVAL; |
161 | } | |
162 | ||
30e2fb18 | 163 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 164 | |
b3a83639 | 165 | request.handle = NULL; |
bd1b331f | 166 | list_for_each_entry(_entry, &dev->maplist, head) { |
d1f2b55a | 167 | if (_entry->map == map) { |
b5e89ed5 DA |
168 | request.handle = |
169 | (void *)(unsigned long)_entry->user_token; | |
d1f2b55a DA |
170 | break; |
171 | } | |
172 | } | |
b3a83639 | 173 | if (request.handle == NULL) |
d1f2b55a DA |
174 | return -EINVAL; |
175 | ||
1da177e4 LT |
176 | if (copy_to_user(argp, &request, sizeof(request))) |
177 | return -EFAULT; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | /** | |
182 | * Set per-context SAREA. | |
b5e89ed5 | 183 | * |
1da177e4 LT |
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 | |
62968144 | 191 | * drm_device::ctx_idr with it. |
1da177e4 LT |
192 | */ |
193 | int drm_setsareactx(struct inode *inode, struct file *filp, | |
b5e89ed5 | 194 | unsigned int cmd, unsigned long arg) |
1da177e4 | 195 | { |
84b1fd10 DA |
196 | struct drm_file *priv = filp->private_data; |
197 | struct drm_device *dev = priv->head->dev; | |
c60ce623 DA |
198 | struct drm_ctx_priv_map request; |
199 | struct drm_map *map = NULL; | |
55910517 | 200 | struct drm_map_list *r_list = NULL; |
1da177e4 LT |
201 | |
202 | if (copy_from_user(&request, | |
c60ce623 DA |
203 | (struct drm_ctx_priv_map __user *) arg, |
204 | sizeof(request))) | |
1da177e4 LT |
205 | return -EFAULT; |
206 | ||
30e2fb18 | 207 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 208 | list_for_each_entry(r_list, &dev->maplist, head) { |
9a186645 | 209 | if (r_list->map |
b5e89ed5 | 210 | && r_list->user_token == (unsigned long)request.handle) |
1da177e4 LT |
211 | goto found; |
212 | } | |
b5e89ed5 | 213 | bad: |
30e2fb18 | 214 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
215 | return -EINVAL; |
216 | ||
b5e89ed5 | 217 | found: |
1da177e4 | 218 | map = r_list->map; |
b5e89ed5 DA |
219 | if (!map) |
220 | goto bad; | |
62968144 DA |
221 | |
222 | if (IS_ERR(idr_replace(&dev->ctx_idr, map, request.ctx_id))) | |
1da177e4 | 223 | goto bad; |
62968144 | 224 | |
30e2fb18 | 225 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
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 | */ | |
84b1fd10 | 245 | static int drm_context_switch(struct drm_device * dev, int old, int new) |
1da177e4 | 246 | { |
b5e89ed5 DA |
247 | if (test_and_set_bit(0, &dev->context_flag)) { |
248 | DRM_ERROR("Reentering -- FIXME\n"); | |
249 | return -EBUSY; | |
250 | } | |
1da177e4 | 251 | |
b5e89ed5 | 252 | DRM_DEBUG("Context switch from %d to %d\n", old, new); |
1da177e4 | 253 | |
b5e89ed5 DA |
254 | if (new == dev->last_context) { |
255 | clear_bit(0, &dev->context_flag); | |
256 | return 0; | |
257 | } | |
1da177e4 | 258 | |
b5e89ed5 | 259 | return 0; |
1da177e4 LT |
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 | */ | |
84b1fd10 | 273 | static int drm_context_switch_complete(struct drm_device * dev, int new) |
1da177e4 | 274 | { |
b5e89ed5 DA |
275 | dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ |
276 | dev->last_switch = jiffies; | |
1da177e4 | 277 | |
b5e89ed5 DA |
278 | if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) { |
279 | DRM_ERROR("Lock isn't held after context switch\n"); | |
280 | } | |
1da177e4 | 281 | |
b5e89ed5 DA |
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); | |
1da177e4 | 287 | |
b5e89ed5 | 288 | return 0; |
1da177e4 LT |
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 | */ | |
b5e89ed5 DA |
300 | int drm_resctx(struct inode *inode, struct file *filp, |
301 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 302 | { |
c60ce623 DA |
303 | struct drm_ctx_res res; |
304 | struct drm_ctx_res __user *argp = (void __user *)arg; | |
305 | struct drm_ctx ctx; | |
1da177e4 LT |
306 | int i; |
307 | ||
b5e89ed5 | 308 | if (copy_from_user(&res, argp, sizeof(res))) |
1da177e4 LT |
309 | return -EFAULT; |
310 | ||
b5e89ed5 DA |
311 | if (res.count >= DRM_RESERVED_CONTEXTS) { |
312 | memset(&ctx, 0, sizeof(ctx)); | |
313 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { | |
1da177e4 | 314 | ctx.handle = i; |
b5e89ed5 | 315 | if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx))) |
1da177e4 LT |
316 | return -EFAULT; |
317 | } | |
318 | } | |
319 | res.count = DRM_RESERVED_CONTEXTS; | |
320 | ||
b5e89ed5 | 321 | if (copy_to_user(argp, &res, sizeof(res))) |
1da177e4 LT |
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 | */ | |
b5e89ed5 DA |
337 | int drm_addctx(struct inode *inode, struct file *filp, |
338 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 339 | { |
84b1fd10 DA |
340 | struct drm_file *priv = filp->private_data; |
341 | struct drm_device *dev = priv->head->dev; | |
55910517 | 342 | struct drm_ctx_list *ctx_entry; |
c60ce623 DA |
343 | struct drm_ctx __user *argp = (void __user *)arg; |
344 | struct drm_ctx ctx; | |
1da177e4 | 345 | |
b5e89ed5 | 346 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
1da177e4 LT |
347 | return -EFAULT; |
348 | ||
b5e89ed5 DA |
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); | |
1da177e4 | 353 | } |
b5e89ed5 DA |
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? */ | |
1da177e4 LT |
358 | return -ENOMEM; |
359 | } | |
360 | ||
b5e89ed5 | 361 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
1da177e4 | 362 | if (dev->driver->context_ctor) |
1e7d5190 | 363 | if (!dev->driver->context_ctor(dev, ctx.handle)) { |
b5e9fc13 DA |
364 | DRM_DEBUG("Running out of ctxs or memory.\n"); |
365 | return -ENOMEM; | |
366 | } | |
1da177e4 LT |
367 | } |
368 | ||
b5e89ed5 DA |
369 | ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST); |
370 | if (!ctx_entry) { | |
1da177e4 LT |
371 | DRM_DEBUG("out of memory\n"); |
372 | return -ENOMEM; | |
373 | } | |
374 | ||
b5e89ed5 | 375 | INIT_LIST_HEAD(&ctx_entry->head); |
1da177e4 LT |
376 | ctx_entry->handle = ctx.handle; |
377 | ctx_entry->tag = priv; | |
378 | ||
30e2fb18 | 379 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 380 | list_add(&ctx_entry->head, &dev->ctxlist); |
1da177e4 | 381 | ++dev->ctx_count; |
30e2fb18 | 382 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 | 383 | |
b5e89ed5 | 384 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
1da177e4 LT |
385 | return -EFAULT; |
386 | return 0; | |
387 | } | |
388 | ||
b5e89ed5 DA |
389 | int drm_modctx(struct inode *inode, struct file *filp, |
390 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
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 | */ | |
b5e89ed5 DA |
405 | int drm_getctx(struct inode *inode, struct file *filp, |
406 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 407 | { |
c60ce623 DA |
408 | struct drm_ctx __user *argp = (void __user *)arg; |
409 | struct drm_ctx ctx; | |
1da177e4 | 410 | |
b5e89ed5 | 411 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
1da177e4 LT |
412 | return -EFAULT; |
413 | ||
414 | /* This is 0, because we don't handle any context flags */ | |
415 | ctx.flags = 0; | |
416 | ||
b5e89ed5 | 417 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
1da177e4 LT |
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 | */ | |
b5e89ed5 DA |
433 | int drm_switchctx(struct inode *inode, struct file *filp, |
434 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 435 | { |
84b1fd10 DA |
436 | struct drm_file *priv = filp->private_data; |
437 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 438 | struct drm_ctx ctx; |
1da177e4 | 439 | |
c60ce623 | 440 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
1da177e4 LT |
441 | return -EFAULT; |
442 | ||
b5e89ed5 DA |
443 | DRM_DEBUG("%d\n", ctx.handle); |
444 | return drm_context_switch(dev, dev->last_context, ctx.handle); | |
1da177e4 LT |
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 | */ | |
b5e89ed5 DA |
458 | int drm_newctx(struct inode *inode, struct file *filp, |
459 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 460 | { |
84b1fd10 DA |
461 | struct drm_file *priv = filp->private_data; |
462 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 463 | struct drm_ctx ctx; |
1da177e4 | 464 | |
c60ce623 | 465 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
1da177e4 LT |
466 | return -EFAULT; |
467 | ||
b5e89ed5 DA |
468 | DRM_DEBUG("%d\n", ctx.handle); |
469 | drm_context_switch_complete(dev, ctx.handle); | |
1da177e4 LT |
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 | */ | |
b5e89ed5 DA |
485 | int drm_rmctx(struct inode *inode, struct file *filp, |
486 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 487 | { |
84b1fd10 DA |
488 | struct drm_file *priv = filp->private_data; |
489 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 490 | struct drm_ctx ctx; |
1da177e4 | 491 | |
c60ce623 | 492 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
1da177e4 LT |
493 | return -EFAULT; |
494 | ||
b5e89ed5 DA |
495 | DRM_DEBUG("%d\n", ctx.handle); |
496 | if (ctx.handle == DRM_KERNEL_CONTEXT + 1) { | |
1da177e4 LT |
497 | priv->remove_auth_on_close = 1; |
498 | } | |
b5e89ed5 | 499 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
1da177e4 LT |
500 | if (dev->driver->context_dtor) |
501 | dev->driver->context_dtor(dev, ctx.handle); | |
b5e89ed5 | 502 | drm_ctxbitmap_free(dev, ctx.handle); |
1da177e4 LT |
503 | } |
504 | ||
30e2fb18 | 505 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 506 | if (!list_empty(&dev->ctxlist)) { |
55910517 | 507 | struct drm_ctx_list *pos, *n; |
1da177e4 | 508 | |
bd1b331f | 509 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
b5e89ed5 DA |
510 | if (pos->handle == ctx.handle) { |
511 | list_del(&pos->head); | |
512 | drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST); | |
1da177e4 LT |
513 | --dev->ctx_count; |
514 | } | |
515 | } | |
516 | } | |
30e2fb18 | 517 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 LT |
518 | |
519 | return 0; | |
520 | } | |
521 | ||
522 | /*@}*/ |