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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 | |
30e2fb18 | 56 | * in drm_device::context_sareas, 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 | { |
b5e89ed5 DA |
61 | if (ctx_handle < 0) |
62 | goto failed; | |
63 | if (!dev->ctx_bitmap) | |
64 | goto failed; | |
1da177e4 | 65 | |
b5e89ed5 | 66 | if (ctx_handle < DRM_MAX_CTXBITMAP) { |
30e2fb18 | 67 | mutex_lock(&dev->struct_mutex); |
b5e89ed5 | 68 | clear_bit(ctx_handle, dev->ctx_bitmap); |
1da177e4 | 69 | dev->context_sareas[ctx_handle] = NULL; |
30e2fb18 | 70 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
71 | return; |
72 | } | |
b5e89ed5 DA |
73 | failed: |
74 | DRM_ERROR("Attempt to free invalid context handle: %d\n", ctx_handle); | |
75 | return; | |
1da177e4 LT |
76 | } |
77 | ||
b5e89ed5 | 78 | /** |
1da177e4 LT |
79 | * Context bitmap allocation. |
80 | * | |
81 | * \param dev DRM device. | |
82 | * \return (non-negative) context handle on success or a negative number on failure. | |
83 | * | |
84 | * Find the first zero bit in drm_device::ctx_bitmap and (re)allocates | |
85 | * drm_device::context_sareas to accommodate the new entry while holding the | |
30e2fb18 | 86 | * drm_device::struct_mutex lock. |
1da177e4 | 87 | */ |
84b1fd10 | 88 | static int drm_ctxbitmap_next(struct drm_device * dev) |
1da177e4 LT |
89 | { |
90 | int bit; | |
91 | ||
b5e89ed5 DA |
92 | if (!dev->ctx_bitmap) |
93 | return -1; | |
1da177e4 | 94 | |
30e2fb18 | 95 | mutex_lock(&dev->struct_mutex); |
b5e89ed5 DA |
96 | bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP); |
97 | if (bit < DRM_MAX_CTXBITMAP) { | |
98 | set_bit(bit, dev->ctx_bitmap); | |
99 | DRM_DEBUG("drm_ctxbitmap_next bit : %d\n", bit); | |
100 | if ((bit + 1) > dev->max_context) { | |
101 | dev->max_context = (bit + 1); | |
102 | if (dev->context_sareas) { | |
c60ce623 | 103 | struct drm_map **ctx_sareas; |
1da177e4 LT |
104 | |
105 | ctx_sareas = drm_realloc(dev->context_sareas, | |
b5e89ed5 DA |
106 | (dev->max_context - |
107 | 1) * | |
108 | sizeof(*dev-> | |
109 | context_sareas), | |
110 | dev->max_context * | |
111 | sizeof(*dev-> | |
112 | context_sareas), | |
113 | DRM_MEM_MAPS); | |
114 | if (!ctx_sareas) { | |
1da177e4 | 115 | clear_bit(bit, dev->ctx_bitmap); |
30e2fb18 | 116 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
117 | return -1; |
118 | } | |
119 | dev->context_sareas = ctx_sareas; | |
120 | dev->context_sareas[bit] = NULL; | |
121 | } else { | |
122 | /* max_context == 1 at this point */ | |
b5e89ed5 DA |
123 | dev->context_sareas = |
124 | drm_alloc(dev->max_context * | |
125 | sizeof(*dev->context_sareas), | |
126 | DRM_MEM_MAPS); | |
127 | if (!dev->context_sareas) { | |
1da177e4 | 128 | clear_bit(bit, dev->ctx_bitmap); |
30e2fb18 | 129 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
130 | return -1; |
131 | } | |
132 | dev->context_sareas[bit] = NULL; | |
133 | } | |
134 | } | |
30e2fb18 | 135 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
136 | return bit; |
137 | } | |
30e2fb18 | 138 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
139 | return -1; |
140 | } | |
141 | ||
142 | /** | |
143 | * Context bitmap initialization. | |
144 | * | |
145 | * \param dev DRM device. | |
146 | * | |
147 | * Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding | |
30e2fb18 | 148 | * the drm_device::struct_mutex lock. |
1da177e4 | 149 | */ |
84b1fd10 | 150 | int drm_ctxbitmap_init(struct drm_device * dev) |
1da177e4 LT |
151 | { |
152 | int i; | |
b5e89ed5 | 153 | int temp; |
1da177e4 | 154 | |
30e2fb18 | 155 | mutex_lock(&dev->struct_mutex); |
b5e89ed5 DA |
156 | dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE, |
157 | DRM_MEM_CTXBITMAP); | |
158 | if (dev->ctx_bitmap == NULL) { | |
30e2fb18 | 159 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
160 | return -ENOMEM; |
161 | } | |
b5e89ed5 | 162 | memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE); |
1da177e4 LT |
163 | dev->context_sareas = NULL; |
164 | dev->max_context = -1; | |
30e2fb18 | 165 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 166 | |
b5e89ed5 DA |
167 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { |
168 | temp = drm_ctxbitmap_next(dev); | |
169 | DRM_DEBUG("drm_ctxbitmap_init : %d\n", temp); | |
1da177e4 LT |
170 | } |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | /** | |
176 | * Context bitmap cleanup. | |
177 | * | |
178 | * \param dev DRM device. | |
179 | * | |
180 | * Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding | |
30e2fb18 | 181 | * the drm_device::struct_mutex lock. |
1da177e4 | 182 | */ |
84b1fd10 | 183 | void drm_ctxbitmap_cleanup(struct drm_device * dev) |
1da177e4 | 184 | { |
30e2fb18 | 185 | mutex_lock(&dev->struct_mutex); |
b5e89ed5 DA |
186 | if (dev->context_sareas) |
187 | drm_free(dev->context_sareas, | |
188 | sizeof(*dev->context_sareas) * | |
189 | dev->max_context, DRM_MEM_MAPS); | |
190 | drm_free((void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP); | |
30e2fb18 | 191 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
192 | } |
193 | ||
194 | /*@}*/ | |
195 | ||
196 | /******************************************************************/ | |
197 | /** \name Per Context SAREA Support */ | |
198 | /*@{*/ | |
199 | ||
200 | /** | |
201 | * Get per-context SAREA. | |
b5e89ed5 | 202 | * |
1da177e4 LT |
203 | * \param inode device inode. |
204 | * \param filp file pointer. | |
205 | * \param cmd command. | |
206 | * \param arg user argument pointing to a drm_ctx_priv_map structure. | |
207 | * \return zero on success or a negative number on failure. | |
208 | * | |
209 | * Gets the map from drm_device::context_sareas with the handle specified and | |
210 | * returns its handle. | |
211 | */ | |
212 | int drm_getsareactx(struct inode *inode, struct file *filp, | |
b5e89ed5 | 213 | unsigned int cmd, unsigned long arg) |
1da177e4 | 214 | { |
84b1fd10 DA |
215 | struct drm_file *priv = filp->private_data; |
216 | struct drm_device *dev = priv->head->dev; | |
c60ce623 DA |
217 | struct drm_ctx_priv_map __user *argp = (void __user *)arg; |
218 | struct drm_ctx_priv_map request; | |
219 | struct drm_map *map; | |
d1f2b55a | 220 | drm_map_list_t *_entry; |
1da177e4 LT |
221 | |
222 | if (copy_from_user(&request, argp, sizeof(request))) | |
223 | return -EFAULT; | |
224 | ||
30e2fb18 | 225 | mutex_lock(&dev->struct_mutex); |
b5e89ed5 DA |
226 | if (dev->max_context < 0 |
227 | || request.ctx_id >= (unsigned)dev->max_context) { | |
30e2fb18 | 228 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
229 | return -EINVAL; |
230 | } | |
231 | ||
232 | map = dev->context_sareas[request.ctx_id]; | |
30e2fb18 | 233 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 234 | |
b3a83639 | 235 | request.handle = NULL; |
bd1b331f | 236 | list_for_each_entry(_entry, &dev->maplist, head) { |
d1f2b55a | 237 | if (_entry->map == map) { |
b5e89ed5 DA |
238 | request.handle = |
239 | (void *)(unsigned long)_entry->user_token; | |
d1f2b55a DA |
240 | break; |
241 | } | |
242 | } | |
b3a83639 | 243 | if (request.handle == NULL) |
d1f2b55a DA |
244 | return -EINVAL; |
245 | ||
1da177e4 LT |
246 | if (copy_to_user(argp, &request, sizeof(request))) |
247 | return -EFAULT; | |
248 | return 0; | |
249 | } | |
250 | ||
251 | /** | |
252 | * Set per-context SAREA. | |
b5e89ed5 | 253 | * |
1da177e4 LT |
254 | * \param inode device inode. |
255 | * \param filp file pointer. | |
256 | * \param cmd command. | |
257 | * \param arg user argument pointing to a drm_ctx_priv_map structure. | |
258 | * \return zero on success or a negative number on failure. | |
259 | * | |
260 | * Searches the mapping specified in \p arg and update the entry in | |
261 | * drm_device::context_sareas with it. | |
262 | */ | |
263 | int drm_setsareactx(struct inode *inode, struct file *filp, | |
b5e89ed5 | 264 | unsigned int cmd, unsigned long arg) |
1da177e4 | 265 | { |
84b1fd10 DA |
266 | struct drm_file *priv = filp->private_data; |
267 | struct drm_device *dev = priv->head->dev; | |
c60ce623 DA |
268 | struct drm_ctx_priv_map request; |
269 | struct drm_map *map = NULL; | |
1da177e4 | 270 | drm_map_list_t *r_list = NULL; |
1da177e4 LT |
271 | |
272 | if (copy_from_user(&request, | |
c60ce623 DA |
273 | (struct drm_ctx_priv_map __user *) arg, |
274 | sizeof(request))) | |
1da177e4 LT |
275 | return -EFAULT; |
276 | ||
30e2fb18 | 277 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 278 | list_for_each_entry(r_list, &dev->maplist, head) { |
9a186645 | 279 | if (r_list->map |
b5e89ed5 | 280 | && r_list->user_token == (unsigned long)request.handle) |
1da177e4 LT |
281 | goto found; |
282 | } | |
b5e89ed5 | 283 | bad: |
30e2fb18 | 284 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
285 | return -EINVAL; |
286 | ||
b5e89ed5 | 287 | found: |
1da177e4 | 288 | map = r_list->map; |
b5e89ed5 DA |
289 | if (!map) |
290 | goto bad; | |
1da177e4 LT |
291 | if (dev->max_context < 0) |
292 | goto bad; | |
b5e89ed5 | 293 | if (request.ctx_id >= (unsigned)dev->max_context) |
1da177e4 LT |
294 | goto bad; |
295 | dev->context_sareas[request.ctx_id] = map; | |
30e2fb18 | 296 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
300 | /*@}*/ | |
301 | ||
302 | /******************************************************************/ | |
303 | /** \name The actual DRM context handling routines */ | |
304 | /*@{*/ | |
305 | ||
306 | /** | |
307 | * Switch context. | |
308 | * | |
309 | * \param dev DRM device. | |
310 | * \param old old context handle. | |
311 | * \param new new context handle. | |
312 | * \return zero on success or a negative number on failure. | |
313 | * | |
314 | * Attempt to set drm_device::context_flag. | |
315 | */ | |
84b1fd10 | 316 | static int drm_context_switch(struct drm_device * dev, int old, int new) |
1da177e4 | 317 | { |
b5e89ed5 DA |
318 | if (test_and_set_bit(0, &dev->context_flag)) { |
319 | DRM_ERROR("Reentering -- FIXME\n"); | |
320 | return -EBUSY; | |
321 | } | |
1da177e4 | 322 | |
b5e89ed5 | 323 | DRM_DEBUG("Context switch from %d to %d\n", old, new); |
1da177e4 | 324 | |
b5e89ed5 DA |
325 | if (new == dev->last_context) { |
326 | clear_bit(0, &dev->context_flag); | |
327 | return 0; | |
328 | } | |
1da177e4 | 329 | |
b5e89ed5 | 330 | return 0; |
1da177e4 LT |
331 | } |
332 | ||
333 | /** | |
334 | * Complete context switch. | |
335 | * | |
336 | * \param dev DRM device. | |
337 | * \param new new context handle. | |
338 | * \return zero on success or a negative number on failure. | |
339 | * | |
340 | * Updates drm_device::last_context and drm_device::last_switch. Verifies the | |
341 | * hardware lock is held, clears the drm_device::context_flag and wakes up | |
342 | * drm_device::context_wait. | |
343 | */ | |
84b1fd10 | 344 | static int drm_context_switch_complete(struct drm_device * dev, int new) |
1da177e4 | 345 | { |
b5e89ed5 DA |
346 | dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ |
347 | dev->last_switch = jiffies; | |
1da177e4 | 348 | |
b5e89ed5 DA |
349 | if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) { |
350 | DRM_ERROR("Lock isn't held after context switch\n"); | |
351 | } | |
1da177e4 | 352 | |
b5e89ed5 DA |
353 | /* If a context switch is ever initiated |
354 | when the kernel holds the lock, release | |
355 | that lock here. */ | |
356 | clear_bit(0, &dev->context_flag); | |
357 | wake_up(&dev->context_wait); | |
1da177e4 | 358 | |
b5e89ed5 | 359 | return 0; |
1da177e4 LT |
360 | } |
361 | ||
362 | /** | |
363 | * Reserve contexts. | |
364 | * | |
365 | * \param inode device inode. | |
366 | * \param filp file pointer. | |
367 | * \param cmd command. | |
368 | * \param arg user argument pointing to a drm_ctx_res structure. | |
369 | * \return zero on success or a negative number on failure. | |
370 | */ | |
b5e89ed5 DA |
371 | int drm_resctx(struct inode *inode, struct file *filp, |
372 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 373 | { |
c60ce623 DA |
374 | struct drm_ctx_res res; |
375 | struct drm_ctx_res __user *argp = (void __user *)arg; | |
376 | struct drm_ctx ctx; | |
1da177e4 LT |
377 | int i; |
378 | ||
b5e89ed5 | 379 | if (copy_from_user(&res, argp, sizeof(res))) |
1da177e4 LT |
380 | return -EFAULT; |
381 | ||
b5e89ed5 DA |
382 | if (res.count >= DRM_RESERVED_CONTEXTS) { |
383 | memset(&ctx, 0, sizeof(ctx)); | |
384 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { | |
1da177e4 | 385 | ctx.handle = i; |
b5e89ed5 | 386 | if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx))) |
1da177e4 LT |
387 | return -EFAULT; |
388 | } | |
389 | } | |
390 | res.count = DRM_RESERVED_CONTEXTS; | |
391 | ||
b5e89ed5 | 392 | if (copy_to_user(argp, &res, sizeof(res))) |
1da177e4 LT |
393 | return -EFAULT; |
394 | return 0; | |
395 | } | |
396 | ||
397 | /** | |
398 | * Add context. | |
399 | * | |
400 | * \param inode device inode. | |
401 | * \param filp file pointer. | |
402 | * \param cmd command. | |
403 | * \param arg user argument pointing to a drm_ctx structure. | |
404 | * \return zero on success or a negative number on failure. | |
405 | * | |
406 | * Get a new handle for the context and copy to userspace. | |
407 | */ | |
b5e89ed5 DA |
408 | int drm_addctx(struct inode *inode, struct file *filp, |
409 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 410 | { |
84b1fd10 DA |
411 | struct drm_file *priv = filp->private_data; |
412 | struct drm_device *dev = priv->head->dev; | |
b5e89ed5 | 413 | drm_ctx_list_t *ctx_entry; |
c60ce623 DA |
414 | struct drm_ctx __user *argp = (void __user *)arg; |
415 | struct drm_ctx ctx; | |
1da177e4 | 416 | |
b5e89ed5 | 417 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
1da177e4 LT |
418 | return -EFAULT; |
419 | ||
b5e89ed5 DA |
420 | ctx.handle = drm_ctxbitmap_next(dev); |
421 | if (ctx.handle == DRM_KERNEL_CONTEXT) { | |
422 | /* Skip kernel's context and get a new one. */ | |
423 | ctx.handle = drm_ctxbitmap_next(dev); | |
1da177e4 | 424 | } |
b5e89ed5 DA |
425 | DRM_DEBUG("%d\n", ctx.handle); |
426 | if (ctx.handle == -1) { | |
427 | DRM_DEBUG("Not enough free contexts.\n"); | |
428 | /* Should this return -EBUSY instead? */ | |
1da177e4 LT |
429 | return -ENOMEM; |
430 | } | |
431 | ||
b5e89ed5 | 432 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
1da177e4 | 433 | if (dev->driver->context_ctor) |
1e7d5190 | 434 | if (!dev->driver->context_ctor(dev, ctx.handle)) { |
b5e9fc13 DA |
435 | DRM_DEBUG("Running out of ctxs or memory.\n"); |
436 | return -ENOMEM; | |
437 | } | |
1da177e4 LT |
438 | } |
439 | ||
b5e89ed5 DA |
440 | ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST); |
441 | if (!ctx_entry) { | |
1da177e4 LT |
442 | DRM_DEBUG("out of memory\n"); |
443 | return -ENOMEM; | |
444 | } | |
445 | ||
b5e89ed5 | 446 | INIT_LIST_HEAD(&ctx_entry->head); |
1da177e4 LT |
447 | ctx_entry->handle = ctx.handle; |
448 | ctx_entry->tag = priv; | |
449 | ||
30e2fb18 | 450 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 451 | list_add(&ctx_entry->head, &dev->ctxlist); |
1da177e4 | 452 | ++dev->ctx_count; |
30e2fb18 | 453 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 | 454 | |
b5e89ed5 | 455 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
1da177e4 LT |
456 | return -EFAULT; |
457 | return 0; | |
458 | } | |
459 | ||
b5e89ed5 DA |
460 | int drm_modctx(struct inode *inode, struct file *filp, |
461 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
462 | { |
463 | /* This does nothing */ | |
464 | return 0; | |
465 | } | |
466 | ||
467 | /** | |
468 | * Get context. | |
469 | * | |
470 | * \param inode device inode. | |
471 | * \param filp file pointer. | |
472 | * \param cmd command. | |
473 | * \param arg user argument pointing to a drm_ctx structure. | |
474 | * \return zero on success or a negative number on failure. | |
475 | */ | |
b5e89ed5 DA |
476 | int drm_getctx(struct inode *inode, struct file *filp, |
477 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 478 | { |
c60ce623 DA |
479 | struct drm_ctx __user *argp = (void __user *)arg; |
480 | struct drm_ctx ctx; | |
1da177e4 | 481 | |
b5e89ed5 | 482 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
1da177e4 LT |
483 | return -EFAULT; |
484 | ||
485 | /* This is 0, because we don't handle any context flags */ | |
486 | ctx.flags = 0; | |
487 | ||
b5e89ed5 | 488 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
1da177e4 LT |
489 | return -EFAULT; |
490 | return 0; | |
491 | } | |
492 | ||
493 | /** | |
494 | * Switch context. | |
495 | * | |
496 | * \param inode device inode. | |
497 | * \param filp file pointer. | |
498 | * \param cmd command. | |
499 | * \param arg user argument pointing to a drm_ctx structure. | |
500 | * \return zero on success or a negative number on failure. | |
501 | * | |
502 | * Calls context_switch(). | |
503 | */ | |
b5e89ed5 DA |
504 | int drm_switchctx(struct inode *inode, struct file *filp, |
505 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 506 | { |
84b1fd10 DA |
507 | struct drm_file *priv = filp->private_data; |
508 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 509 | struct drm_ctx ctx; |
1da177e4 | 510 | |
c60ce623 | 511 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
1da177e4 LT |
512 | return -EFAULT; |
513 | ||
b5e89ed5 DA |
514 | DRM_DEBUG("%d\n", ctx.handle); |
515 | return drm_context_switch(dev, dev->last_context, ctx.handle); | |
1da177e4 LT |
516 | } |
517 | ||
518 | /** | |
519 | * New context. | |
520 | * | |
521 | * \param inode device inode. | |
522 | * \param filp file pointer. | |
523 | * \param cmd command. | |
524 | * \param arg user argument pointing to a drm_ctx structure. | |
525 | * \return zero on success or a negative number on failure. | |
526 | * | |
527 | * Calls context_switch_complete(). | |
528 | */ | |
b5e89ed5 DA |
529 | int drm_newctx(struct inode *inode, struct file *filp, |
530 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 531 | { |
84b1fd10 DA |
532 | struct drm_file *priv = filp->private_data; |
533 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 534 | struct drm_ctx ctx; |
1da177e4 | 535 | |
c60ce623 | 536 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
1da177e4 LT |
537 | return -EFAULT; |
538 | ||
b5e89ed5 DA |
539 | DRM_DEBUG("%d\n", ctx.handle); |
540 | drm_context_switch_complete(dev, ctx.handle); | |
1da177e4 LT |
541 | |
542 | return 0; | |
543 | } | |
544 | ||
545 | /** | |
546 | * Remove context. | |
547 | * | |
548 | * \param inode device inode. | |
549 | * \param filp file pointer. | |
550 | * \param cmd command. | |
551 | * \param arg user argument pointing to a drm_ctx structure. | |
552 | * \return zero on success or a negative number on failure. | |
553 | * | |
554 | * If not the special kernel context, calls ctxbitmap_free() to free the specified context. | |
555 | */ | |
b5e89ed5 DA |
556 | int drm_rmctx(struct inode *inode, struct file *filp, |
557 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 558 | { |
84b1fd10 DA |
559 | struct drm_file *priv = filp->private_data; |
560 | struct drm_device *dev = priv->head->dev; | |
c60ce623 | 561 | struct drm_ctx ctx; |
1da177e4 | 562 | |
c60ce623 | 563 | if (copy_from_user(&ctx, (struct drm_ctx __user *) arg, sizeof(ctx))) |
1da177e4 LT |
564 | return -EFAULT; |
565 | ||
b5e89ed5 DA |
566 | DRM_DEBUG("%d\n", ctx.handle); |
567 | if (ctx.handle == DRM_KERNEL_CONTEXT + 1) { | |
1da177e4 LT |
568 | priv->remove_auth_on_close = 1; |
569 | } | |
b5e89ed5 | 570 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
1da177e4 LT |
571 | if (dev->driver->context_dtor) |
572 | dev->driver->context_dtor(dev, ctx.handle); | |
b5e89ed5 | 573 | drm_ctxbitmap_free(dev, ctx.handle); |
1da177e4 LT |
574 | } |
575 | ||
30e2fb18 | 576 | mutex_lock(&dev->ctxlist_mutex); |
bd1b331f | 577 | if (!list_empty(&dev->ctxlist)) { |
1da177e4 LT |
578 | drm_ctx_list_t *pos, *n; |
579 | ||
bd1b331f | 580 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
b5e89ed5 DA |
581 | if (pos->handle == ctx.handle) { |
582 | list_del(&pos->head); | |
583 | drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST); | |
1da177e4 LT |
584 | --dev->ctx_count; |
585 | } | |
586 | } | |
587 | } | |
30e2fb18 | 588 | mutex_unlock(&dev->ctxlist_mutex); |
1da177e4 LT |
589 | |
590 | return 0; | |
591 | } | |
592 | ||
593 | /*@}*/ |