Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
e7b96070 | 2 | * Legacy: Generic DRM Contexts |
1da177e4 LT |
3 | * |
4 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
6 | * All Rights Reserved. | |
7 | * | |
e7b96070 DH |
8 | * Author: Rickard E. (Rik) Faith <faith@valinux.com> |
9 | * Author: Gareth Hughes <gareth@valinux.com> | |
10 | * | |
1da177e4 LT |
11 | * Permission is hereby granted, free of charge, to any person obtaining a |
12 | * copy of this software and associated documentation files (the "Software"), | |
13 | * to deal in the Software without restriction, including without limitation | |
14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
15 | * and/or sell copies of the Software, and to permit persons to whom the | |
16 | * Software is furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice (including the next | |
19 | * paragraph) shall be included in all copies or substantial portions of the | |
20 | * Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
28 | * OTHER DEALINGS IN THE SOFTWARE. | |
29 | */ | |
30 | ||
0500c04e SR |
31 | #include <linux/slab.h> |
32 | #include <linux/uaccess.h> | |
33 | ||
34 | #include <drm/drm_drv.h> | |
35 | #include <drm/drm_file.h> | |
36 | #include <drm/drm_print.h> | |
37 | ||
e7b96070 DH |
38 | #include "drm_legacy.h" |
39 | ||
40 | struct drm_ctx_list { | |
41 | struct list_head head; | |
42 | drm_context_t handle; | |
43 | struct drm_file *tag; | |
44 | }; | |
1da177e4 | 45 | |
c21eb21c DA |
46 | /******************************************************************/ |
47 | /** \name Context bitmap support */ | |
48 | /*@{*/ | |
49 | ||
1da177e4 LT |
50 | /** |
51 | * Free a handle from the context bitmap. | |
52 | * | |
53 | * \param dev DRM device. | |
54 | * \param ctx_handle context handle. | |
55 | * | |
56 | * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry | |
62968144 | 57 | * in drm_device::ctx_idr, while holding the drm_device::struct_mutex |
1da177e4 LT |
58 | * lock. |
59 | */ | |
e7b96070 | 60 | void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle) |
1da177e4 | 61 | { |
0e975980 | 62 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 63 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
0e975980 PA |
64 | return; |
65 | ||
62968144 DA |
66 | mutex_lock(&dev->struct_mutex); |
67 | idr_remove(&dev->ctx_idr, ctx_handle); | |
68 | mutex_unlock(&dev->struct_mutex); | |
1da177e4 LT |
69 | } |
70 | ||
b5e89ed5 | 71 | /** |
1da177e4 LT |
72 | * Context bitmap allocation. |
73 | * | |
74 | * \param dev DRM device. | |
75 | * \return (non-negative) context handle on success or a negative number on failure. | |
76 | * | |
62968144 | 77 | * Allocate a new idr from drm_device::ctx_idr while holding the |
30e2fb18 | 78 | * drm_device::struct_mutex lock. |
1da177e4 | 79 | */ |
e7b96070 | 80 | static int drm_legacy_ctxbitmap_next(struct drm_device * dev) |
1da177e4 | 81 | { |
62968144 | 82 | int ret; |
1da177e4 | 83 | |
30e2fb18 | 84 | mutex_lock(&dev->struct_mutex); |
2e928815 TH |
85 | ret = idr_alloc(&dev->ctx_idr, NULL, DRM_RESERVED_CONTEXTS, 0, |
86 | GFP_KERNEL); | |
30e2fb18 | 87 | mutex_unlock(&dev->struct_mutex); |
2e928815 | 88 | return ret; |
1da177e4 LT |
89 | } |
90 | ||
91 | /** | |
92 | * Context bitmap initialization. | |
93 | * | |
94 | * \param dev DRM device. | |
95 | * | |
62968144 | 96 | * Initialise the drm_device::ctx_idr |
1da177e4 | 97 | */ |
ba6976c1 | 98 | void drm_legacy_ctxbitmap_init(struct drm_device * dev) |
1da177e4 | 99 | { |
0e975980 | 100 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 101 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
ba6976c1 | 102 | return; |
0e975980 | 103 | |
62968144 | 104 | idr_init(&dev->ctx_idr); |
1da177e4 LT |
105 | } |
106 | ||
107 | /** | |
108 | * Context bitmap cleanup. | |
109 | * | |
110 | * \param dev DRM device. | |
111 | * | |
62968144 DA |
112 | * Free all idr members using drm_ctx_sarea_free helper function |
113 | * while holding the drm_device::struct_mutex lock. | |
1da177e4 | 114 | */ |
e7b96070 | 115 | void drm_legacy_ctxbitmap_cleanup(struct drm_device * dev) |
1da177e4 | 116 | { |
0e975980 | 117 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 118 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
0e975980 PA |
119 | return; |
120 | ||
30e2fb18 | 121 | mutex_lock(&dev->struct_mutex); |
4d53233a | 122 | idr_destroy(&dev->ctx_idr); |
30e2fb18 | 123 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
124 | } |
125 | ||
9f8d21ea DH |
126 | /** |
127 | * drm_ctxbitmap_flush() - Flush all contexts owned by a file | |
128 | * @dev: DRM device to operate on | |
129 | * @file: Open file to flush contexts for | |
130 | * | |
131 | * This iterates over all contexts on @dev and drops them if they're owned by | |
132 | * @file. Note that after this call returns, new contexts might be added if | |
133 | * the file is still alive. | |
134 | */ | |
e7b96070 | 135 | void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file) |
9f8d21ea DH |
136 | { |
137 | struct drm_ctx_list *pos, *tmp; | |
138 | ||
0e975980 | 139 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 140 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
0e975980 PA |
141 | return; |
142 | ||
9f8d21ea DH |
143 | mutex_lock(&dev->ctxlist_mutex); |
144 | ||
145 | list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) { | |
146 | if (pos->tag == file && | |
147 | pos->handle != DRM_KERNEL_CONTEXT) { | |
148 | if (dev->driver->context_dtor) | |
149 | dev->driver->context_dtor(dev, pos->handle); | |
150 | ||
e7b96070 | 151 | drm_legacy_ctxbitmap_free(dev, pos->handle); |
9f8d21ea DH |
152 | list_del(&pos->head); |
153 | kfree(pos); | |
154 | } | |
155 | } | |
156 | ||
157 | mutex_unlock(&dev->ctxlist_mutex); | |
158 | } | |
159 | ||
1da177e4 LT |
160 | /*@}*/ |
161 | ||
162 | /******************************************************************/ | |
163 | /** \name Per Context SAREA Support */ | |
164 | /*@{*/ | |
165 | ||
166 | /** | |
167 | * Get per-context SAREA. | |
b5e89ed5 | 168 | * |
1da177e4 | 169 | * \param inode device inode. |
6c340eac | 170 | * \param file_priv DRM file private. |
1da177e4 LT |
171 | * \param cmd command. |
172 | * \param arg user argument pointing to a drm_ctx_priv_map structure. | |
173 | * \return zero on success or a negative number on failure. | |
174 | * | |
62968144 | 175 | * Gets the map from drm_device::ctx_idr with the handle specified and |
1da177e4 LT |
176 | * returns its handle. |
177 | */ | |
e7b96070 DH |
178 | int drm_legacy_getsareactx(struct drm_device *dev, void *data, |
179 | struct drm_file *file_priv) | |
1da177e4 | 180 | { |
c153f45f | 181 | struct drm_ctx_priv_map *request = data; |
f77d390c | 182 | struct drm_local_map *map; |
55910517 | 183 | struct drm_map_list *_entry; |
1da177e4 | 184 | |
0e975980 | 185 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 186 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 187 | return -EOPNOTSUPP; |
0e975980 | 188 | |
30e2fb18 | 189 | mutex_lock(&dev->struct_mutex); |
62968144 | 190 | |
c153f45f | 191 | map = idr_find(&dev->ctx_idr, request->ctx_id); |
62968144 | 192 | if (!map) { |
30e2fb18 | 193 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
194 | return -EINVAL; |
195 | } | |
196 | ||
c153f45f | 197 | request->handle = NULL; |
bd1b331f | 198 | list_for_each_entry(_entry, &dev->maplist, head) { |
d1f2b55a | 199 | if (_entry->map == map) { |
bc5f4523 | 200 | request->handle = |
b5e89ed5 | 201 | (void *)(unsigned long)_entry->user_token; |
d1f2b55a DA |
202 | break; |
203 | } | |
204 | } | |
09b4ea47 IH |
205 | |
206 | mutex_unlock(&dev->struct_mutex); | |
207 | ||
c153f45f | 208 | if (request->handle == NULL) |
d1f2b55a DA |
209 | return -EINVAL; |
210 | ||
1da177e4 LT |
211 | return 0; |
212 | } | |
213 | ||
214 | /** | |
215 | * Set per-context SAREA. | |
b5e89ed5 | 216 | * |
1da177e4 | 217 | * \param inode device inode. |
6c340eac | 218 | * \param file_priv DRM file private. |
1da177e4 LT |
219 | * \param cmd command. |
220 | * \param arg user argument pointing to a drm_ctx_priv_map structure. | |
221 | * \return zero on success or a negative number on failure. | |
222 | * | |
223 | * Searches the mapping specified in \p arg and update the entry in | |
62968144 | 224 | * drm_device::ctx_idr with it. |
1da177e4 | 225 | */ |
e7b96070 DH |
226 | int drm_legacy_setsareactx(struct drm_device *dev, void *data, |
227 | struct drm_file *file_priv) | |
1da177e4 | 228 | { |
c153f45f | 229 | struct drm_ctx_priv_map *request = data; |
f77d390c | 230 | struct drm_local_map *map = NULL; |
55910517 | 231 | struct drm_map_list *r_list = NULL; |
1da177e4 | 232 | |
0e975980 | 233 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 234 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 235 | return -EOPNOTSUPP; |
0e975980 | 236 | |
30e2fb18 | 237 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 238 | list_for_each_entry(r_list, &dev->maplist, head) { |
9a186645 | 239 | if (r_list->map |
c153f45f | 240 | && r_list->user_token == (unsigned long) request->handle) |
1da177e4 LT |
241 | goto found; |
242 | } | |
b5e89ed5 | 243 | bad: |
30e2fb18 | 244 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
245 | return -EINVAL; |
246 | ||
b5e89ed5 | 247 | found: |
1da177e4 | 248 | map = r_list->map; |
b5e89ed5 DA |
249 | if (!map) |
250 | goto bad; | |
62968144 | 251 | |
c153f45f | 252 | if (IS_ERR(idr_replace(&dev->ctx_idr, map, request->ctx_id))) |
1da177e4 | 253 | goto bad; |
62968144 | 254 | |
30e2fb18 | 255 | mutex_unlock(&dev->struct_mutex); |
c153f45f | 256 | |
1da177e4 LT |
257 | return 0; |
258 | } | |
259 | ||
260 | /*@}*/ | |
261 | ||
262 | /******************************************************************/ | |
263 | /** \name The actual DRM context handling routines */ | |
264 | /*@{*/ | |
265 | ||
266 | /** | |
267 | * Switch context. | |
268 | * | |
269 | * \param dev DRM device. | |
270 | * \param old old context handle. | |
271 | * \param new new context handle. | |
272 | * \return zero on success or a negative number on failure. | |
273 | * | |
274 | * Attempt to set drm_device::context_flag. | |
275 | */ | |
84b1fd10 | 276 | static int drm_context_switch(struct drm_device * dev, int old, int new) |
1da177e4 | 277 | { |
b5e89ed5 DA |
278 | if (test_and_set_bit(0, &dev->context_flag)) { |
279 | DRM_ERROR("Reentering -- FIXME\n"); | |
280 | return -EBUSY; | |
281 | } | |
1da177e4 | 282 | |
b5e89ed5 | 283 | DRM_DEBUG("Context switch from %d to %d\n", old, new); |
1da177e4 | 284 | |
b5e89ed5 DA |
285 | if (new == dev->last_context) { |
286 | clear_bit(0, &dev->context_flag); | |
287 | return 0; | |
288 | } | |
1da177e4 | 289 | |
b5e89ed5 | 290 | return 0; |
1da177e4 LT |
291 | } |
292 | ||
293 | /** | |
294 | * Complete context switch. | |
295 | * | |
296 | * \param dev DRM device. | |
297 | * \param new new context handle. | |
298 | * \return zero on success or a negative number on failure. | |
299 | * | |
300 | * Updates drm_device::last_context and drm_device::last_switch. Verifies the | |
301 | * hardware lock is held, clears the drm_device::context_flag and wakes up | |
302 | * drm_device::context_wait. | |
303 | */ | |
7c1c2871 DA |
304 | static int drm_context_switch_complete(struct drm_device *dev, |
305 | struct drm_file *file_priv, int new) | |
1da177e4 | 306 | { |
b5e89ed5 | 307 | dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ |
1da177e4 | 308 | |
7c1c2871 | 309 | if (!_DRM_LOCK_IS_HELD(file_priv->master->lock.hw_lock->lock)) { |
b5e89ed5 DA |
310 | DRM_ERROR("Lock isn't held after context switch\n"); |
311 | } | |
1da177e4 | 312 | |
b5e89ed5 DA |
313 | /* If a context switch is ever initiated |
314 | when the kernel holds the lock, release | |
315 | that lock here. */ | |
316 | clear_bit(0, &dev->context_flag); | |
1da177e4 | 317 | |
b5e89ed5 | 318 | return 0; |
1da177e4 LT |
319 | } |
320 | ||
321 | /** | |
322 | * Reserve contexts. | |
323 | * | |
324 | * \param inode device inode. | |
6c340eac | 325 | * \param file_priv DRM file private. |
1da177e4 LT |
326 | * \param cmd command. |
327 | * \param arg user argument pointing to a drm_ctx_res structure. | |
328 | * \return zero on success or a negative number on failure. | |
329 | */ | |
e7b96070 DH |
330 | int drm_legacy_resctx(struct drm_device *dev, void *data, |
331 | struct drm_file *file_priv) | |
1da177e4 | 332 | { |
c153f45f | 333 | struct drm_ctx_res *res = data; |
c60ce623 | 334 | struct drm_ctx ctx; |
1da177e4 LT |
335 | int i; |
336 | ||
0e975980 | 337 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 338 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 339 | return -EOPNOTSUPP; |
0e975980 | 340 | |
c153f45f | 341 | if (res->count >= DRM_RESERVED_CONTEXTS) { |
b5e89ed5 DA |
342 | memset(&ctx, 0, sizeof(ctx)); |
343 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { | |
1da177e4 | 344 | ctx.handle = i; |
c153f45f | 345 | if (copy_to_user(&res->contexts[i], &ctx, sizeof(ctx))) |
1da177e4 LT |
346 | return -EFAULT; |
347 | } | |
348 | } | |
c153f45f | 349 | res->count = DRM_RESERVED_CONTEXTS; |
1da177e4 | 350 | |
1da177e4 LT |
351 | return 0; |
352 | } | |
353 | ||
354 | /** | |
355 | * Add context. | |
356 | * | |
357 | * \param inode device inode. | |
6c340eac | 358 | * \param file_priv DRM file private. |
1da177e4 LT |
359 | * \param cmd command. |
360 | * \param arg user argument pointing to a drm_ctx structure. | |
361 | * \return zero on success or a negative number on failure. | |
362 | * | |
363 | * Get a new handle for the context and copy to userspace. | |
364 | */ | |
e7b96070 DH |
365 | int drm_legacy_addctx(struct drm_device *dev, void *data, |
366 | struct drm_file *file_priv) | |
1da177e4 | 367 | { |
55910517 | 368 | struct drm_ctx_list *ctx_entry; |
c153f45f | 369 | struct drm_ctx *ctx = data; |
c39191fe | 370 | int tmp_handle; |
1da177e4 | 371 | |
0e975980 | 372 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 373 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 374 | return -EOPNOTSUPP; |
0e975980 | 375 | |
c39191fe Y |
376 | tmp_handle = drm_legacy_ctxbitmap_next(dev); |
377 | if (tmp_handle == DRM_KERNEL_CONTEXT) { | |
b5e89ed5 | 378 | /* Skip kernel's context and get a new one. */ |
c39191fe | 379 | tmp_handle = drm_legacy_ctxbitmap_next(dev); |
1da177e4 | 380 | } |
c39191fe Y |
381 | DRM_DEBUG("%d\n", tmp_handle); |
382 | if (tmp_handle < 0) { | |
b5e89ed5 DA |
383 | DRM_DEBUG("Not enough free contexts.\n"); |
384 | /* Should this return -EBUSY instead? */ | |
c39191fe | 385 | return tmp_handle; |
1da177e4 LT |
386 | } |
387 | ||
c39191fe Y |
388 | ctx->handle = tmp_handle; |
389 | ||
9a298b2a | 390 | ctx_entry = kmalloc(sizeof(*ctx_entry), GFP_KERNEL); |
b5e89ed5 | 391 | if (!ctx_entry) { |
1da177e4 LT |
392 | DRM_DEBUG("out of memory\n"); |
393 | return -ENOMEM; | |
394 | } | |
395 | ||
b5e89ed5 | 396 | INIT_LIST_HEAD(&ctx_entry->head); |
c153f45f | 397 | ctx_entry->handle = ctx->handle; |
6c340eac | 398 | ctx_entry->tag = file_priv; |
1da177e4 | 399 | |
30e2fb18 | 400 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 401 | list_add(&ctx_entry->head, &dev->ctxlist); |
30e2fb18 | 402 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 | 403 | |
1da177e4 LT |
404 | return 0; |
405 | } | |
406 | ||
1da177e4 LT |
407 | /** |
408 | * Get context. | |
409 | * | |
410 | * \param inode device inode. | |
6c340eac | 411 | * \param file_priv DRM file private. |
1da177e4 LT |
412 | * \param cmd command. |
413 | * \param arg user argument pointing to a drm_ctx structure. | |
414 | * \return zero on success or a negative number on failure. | |
415 | */ | |
e7b96070 DH |
416 | int drm_legacy_getctx(struct drm_device *dev, void *data, |
417 | struct drm_file *file_priv) | |
1da177e4 | 418 | { |
c153f45f | 419 | struct drm_ctx *ctx = data; |
1da177e4 | 420 | |
0e975980 | 421 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 422 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 423 | return -EOPNOTSUPP; |
0e975980 | 424 | |
1da177e4 | 425 | /* This is 0, because we don't handle any context flags */ |
c153f45f | 426 | ctx->flags = 0; |
1da177e4 | 427 | |
1da177e4 LT |
428 | return 0; |
429 | } | |
430 | ||
431 | /** | |
432 | * Switch context. | |
433 | * | |
434 | * \param inode device inode. | |
6c340eac | 435 | * \param file_priv DRM file private. |
1da177e4 LT |
436 | * \param cmd command. |
437 | * \param arg user argument pointing to a drm_ctx structure. | |
438 | * \return zero on success or a negative number on failure. | |
439 | * | |
440 | * Calls context_switch(). | |
441 | */ | |
e7b96070 DH |
442 | int drm_legacy_switchctx(struct drm_device *dev, void *data, |
443 | struct drm_file *file_priv) | |
1da177e4 | 444 | { |
c153f45f | 445 | struct drm_ctx *ctx = data; |
1da177e4 | 446 | |
0e975980 | 447 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 448 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 449 | return -EOPNOTSUPP; |
0e975980 | 450 | |
c153f45f EA |
451 | DRM_DEBUG("%d\n", ctx->handle); |
452 | return drm_context_switch(dev, dev->last_context, ctx->handle); | |
1da177e4 LT |
453 | } |
454 | ||
455 | /** | |
456 | * New context. | |
457 | * | |
458 | * \param inode device inode. | |
6c340eac | 459 | * \param file_priv DRM file private. |
1da177e4 LT |
460 | * \param cmd command. |
461 | * \param arg user argument pointing to a drm_ctx structure. | |
462 | * \return zero on success or a negative number on failure. | |
463 | * | |
464 | * Calls context_switch_complete(). | |
465 | */ | |
e7b96070 DH |
466 | int drm_legacy_newctx(struct drm_device *dev, void *data, |
467 | struct drm_file *file_priv) | |
1da177e4 | 468 | { |
c153f45f | 469 | struct drm_ctx *ctx = data; |
1da177e4 | 470 | |
0e975980 | 471 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 472 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 473 | return -EOPNOTSUPP; |
0e975980 | 474 | |
c153f45f | 475 | DRM_DEBUG("%d\n", ctx->handle); |
7c1c2871 | 476 | drm_context_switch_complete(dev, file_priv, ctx->handle); |
1da177e4 LT |
477 | |
478 | return 0; | |
479 | } | |
480 | ||
481 | /** | |
482 | * Remove context. | |
483 | * | |
484 | * \param inode device inode. | |
6c340eac | 485 | * \param file_priv DRM file private. |
1da177e4 LT |
486 | * \param cmd command. |
487 | * \param arg user argument pointing to a drm_ctx structure. | |
488 | * \return zero on success or a negative number on failure. | |
489 | * | |
490 | * If not the special kernel context, calls ctxbitmap_free() to free the specified context. | |
491 | */ | |
e7b96070 DH |
492 | int drm_legacy_rmctx(struct drm_device *dev, void *data, |
493 | struct drm_file *file_priv) | |
1da177e4 | 494 | { |
c153f45f | 495 | struct drm_ctx *ctx = data; |
1da177e4 | 496 | |
0e975980 | 497 | if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && |
fa538645 | 498 | !drm_core_check_feature(dev, DRIVER_LEGACY)) |
69fdf420 | 499 | return -EOPNOTSUPP; |
0e975980 | 500 | |
c153f45f | 501 | DRM_DEBUG("%d\n", ctx->handle); |
c153f45f | 502 | if (ctx->handle != DRM_KERNEL_CONTEXT) { |
1da177e4 | 503 | if (dev->driver->context_dtor) |
c153f45f | 504 | dev->driver->context_dtor(dev, ctx->handle); |
e7b96070 | 505 | drm_legacy_ctxbitmap_free(dev, ctx->handle); |
1da177e4 LT |
506 | } |
507 | ||
30e2fb18 | 508 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 509 | if (!list_empty(&dev->ctxlist)) { |
55910517 | 510 | struct drm_ctx_list *pos, *n; |
1da177e4 | 511 | |
bd1b331f | 512 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
c153f45f | 513 | if (pos->handle == ctx->handle) { |
b5e89ed5 | 514 | list_del(&pos->head); |
9a298b2a | 515 | kfree(pos); |
1da177e4 LT |
516 | } |
517 | } | |
518 | } | |
30e2fb18 | 519 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 LT |
520 | |
521 | return 0; | |
522 | } | |
523 | ||
524 | /*@}*/ |