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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 | |
56 | * in drm_device::context_sareas, while holding the drm_device::struct_sem | |
57 | * lock. | |
58 | */ | |
b5e89ed5 | 59 | void drm_ctxbitmap_free(drm_device_t * 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) { |
1da177e4 | 67 | down(&dev->struct_sem); |
b5e89ed5 | 68 | clear_bit(ctx_handle, dev->ctx_bitmap); |
1da177e4 LT |
69 | dev->context_sareas[ctx_handle] = NULL; |
70 | up(&dev->struct_sem); | |
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 | |
86 | * drm_device::struct_sem lock. | |
87 | */ | |
b5e89ed5 | 88 | static int drm_ctxbitmap_next(drm_device_t * dev) |
1da177e4 LT |
89 | { |
90 | int bit; | |
91 | ||
b5e89ed5 DA |
92 | if (!dev->ctx_bitmap) |
93 | return -1; | |
1da177e4 LT |
94 | |
95 | down(&dev->struct_sem); | |
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) { | |
1da177e4 LT |
103 | drm_map_t **ctx_sareas; |
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 LT |
115 | clear_bit(bit, dev->ctx_bitmap); |
116 | up(&dev->struct_sem); | |
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 LT |
128 | clear_bit(bit, dev->ctx_bitmap); |
129 | up(&dev->struct_sem); | |
130 | return -1; | |
131 | } | |
132 | dev->context_sareas[bit] = NULL; | |
133 | } | |
134 | } | |
135 | up(&dev->struct_sem); | |
136 | return bit; | |
137 | } | |
138 | up(&dev->struct_sem); | |
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 | |
148 | * the drm_device::struct_sem lock. | |
149 | */ | |
b5e89ed5 | 150 | int drm_ctxbitmap_init(drm_device_t * dev) |
1da177e4 LT |
151 | { |
152 | int i; | |
b5e89ed5 | 153 | int temp; |
1da177e4 LT |
154 | |
155 | down(&dev->struct_sem); | |
b5e89ed5 DA |
156 | dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE, |
157 | DRM_MEM_CTXBITMAP); | |
158 | if (dev->ctx_bitmap == NULL) { | |
1da177e4 LT |
159 | up(&dev->struct_sem); |
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; | |
165 | up(&dev->struct_sem); | |
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 | |
181 | * the drm_device::struct_sem lock. | |
182 | */ | |
b5e89ed5 | 183 | void drm_ctxbitmap_cleanup(drm_device_t * dev) |
1da177e4 LT |
184 | { |
185 | down(&dev->struct_sem); | |
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); | |
1da177e4 LT |
191 | up(&dev->struct_sem); |
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 | { |
b5e89ed5 DA |
215 | drm_file_t *priv = filp->private_data; |
216 | drm_device_t *dev = priv->head->dev; | |
1da177e4 LT |
217 | drm_ctx_priv_map_t __user *argp = (void __user *)arg; |
218 | drm_ctx_priv_map_t request; | |
219 | drm_map_t *map; | |
d1f2b55a | 220 | drm_map_list_t *_entry; |
1da177e4 LT |
221 | |
222 | if (copy_from_user(&request, argp, sizeof(request))) | |
223 | return -EFAULT; | |
224 | ||
225 | down(&dev->struct_sem); | |
b5e89ed5 DA |
226 | if (dev->max_context < 0 |
227 | || request.ctx_id >= (unsigned)dev->max_context) { | |
1da177e4 LT |
228 | up(&dev->struct_sem); |
229 | return -EINVAL; | |
230 | } | |
231 | ||
232 | map = dev->context_sareas[request.ctx_id]; | |
233 | up(&dev->struct_sem); | |
234 | ||
d1f2b55a | 235 | request.handle = 0; |
b5e89ed5 | 236 | list_for_each_entry(_entry, &dev->maplist->head, 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 | } | |
243 | if (request.handle == 0) | |
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 | { |
b5e89ed5 DA |
266 | drm_file_t *priv = filp->private_data; |
267 | drm_device_t *dev = priv->head->dev; | |
1da177e4 LT |
268 | drm_ctx_priv_map_t request; |
269 | drm_map_t *map = NULL; | |
270 | drm_map_list_t *r_list = NULL; | |
271 | struct list_head *list; | |
272 | ||
273 | if (copy_from_user(&request, | |
b5e89ed5 | 274 | (drm_ctx_priv_map_t __user *) arg, sizeof(request))) |
1da177e4 LT |
275 | return -EFAULT; |
276 | ||
277 | down(&dev->struct_sem); | |
278 | list_for_each(list, &dev->maplist->head) { | |
279 | r_list = list_entry(list, drm_map_list_t, head); | |
9a186645 | 280 | if (r_list->map |
b5e89ed5 | 281 | && r_list->user_token == (unsigned long)request.handle) |
1da177e4 LT |
282 | goto found; |
283 | } | |
b5e89ed5 | 284 | bad: |
1da177e4 LT |
285 | up(&dev->struct_sem); |
286 | return -EINVAL; | |
287 | ||
b5e89ed5 | 288 | found: |
1da177e4 | 289 | map = r_list->map; |
b5e89ed5 DA |
290 | if (!map) |
291 | goto bad; | |
1da177e4 LT |
292 | if (dev->max_context < 0) |
293 | goto bad; | |
b5e89ed5 | 294 | if (request.ctx_id >= (unsigned)dev->max_context) |
1da177e4 LT |
295 | goto bad; |
296 | dev->context_sareas[request.ctx_id] = map; | |
297 | up(&dev->struct_sem); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | /*@}*/ | |
302 | ||
303 | /******************************************************************/ | |
304 | /** \name The actual DRM context handling routines */ | |
305 | /*@{*/ | |
306 | ||
307 | /** | |
308 | * Switch context. | |
309 | * | |
310 | * \param dev DRM device. | |
311 | * \param old old context handle. | |
312 | * \param new new context handle. | |
313 | * \return zero on success or a negative number on failure. | |
314 | * | |
315 | * Attempt to set drm_device::context_flag. | |
316 | */ | |
b5e89ed5 | 317 | static int drm_context_switch(drm_device_t * dev, int old, int new) |
1da177e4 | 318 | { |
b5e89ed5 DA |
319 | if (test_and_set_bit(0, &dev->context_flag)) { |
320 | DRM_ERROR("Reentering -- FIXME\n"); | |
321 | return -EBUSY; | |
322 | } | |
1da177e4 | 323 | |
b5e89ed5 | 324 | DRM_DEBUG("Context switch from %d to %d\n", old, new); |
1da177e4 | 325 | |
b5e89ed5 DA |
326 | if (new == dev->last_context) { |
327 | clear_bit(0, &dev->context_flag); | |
328 | return 0; | |
329 | } | |
1da177e4 | 330 | |
b5e89ed5 | 331 | return 0; |
1da177e4 LT |
332 | } |
333 | ||
334 | /** | |
335 | * Complete context switch. | |
336 | * | |
337 | * \param dev DRM device. | |
338 | * \param new new context handle. | |
339 | * \return zero on success or a negative number on failure. | |
340 | * | |
341 | * Updates drm_device::last_context and drm_device::last_switch. Verifies the | |
342 | * hardware lock is held, clears the drm_device::context_flag and wakes up | |
343 | * drm_device::context_wait. | |
344 | */ | |
b5e89ed5 | 345 | static int drm_context_switch_complete(drm_device_t * dev, int new) |
1da177e4 | 346 | { |
b5e89ed5 DA |
347 | dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ |
348 | dev->last_switch = jiffies; | |
1da177e4 | 349 | |
b5e89ed5 DA |
350 | if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) { |
351 | DRM_ERROR("Lock isn't held after context switch\n"); | |
352 | } | |
1da177e4 | 353 | |
b5e89ed5 DA |
354 | /* If a context switch is ever initiated |
355 | when the kernel holds the lock, release | |
356 | that lock here. */ | |
357 | clear_bit(0, &dev->context_flag); | |
358 | wake_up(&dev->context_wait); | |
1da177e4 | 359 | |
b5e89ed5 | 360 | return 0; |
1da177e4 LT |
361 | } |
362 | ||
363 | /** | |
364 | * Reserve contexts. | |
365 | * | |
366 | * \param inode device inode. | |
367 | * \param filp file pointer. | |
368 | * \param cmd command. | |
369 | * \param arg user argument pointing to a drm_ctx_res structure. | |
370 | * \return zero on success or a negative number on failure. | |
371 | */ | |
b5e89ed5 DA |
372 | int drm_resctx(struct inode *inode, struct file *filp, |
373 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
374 | { |
375 | drm_ctx_res_t res; | |
376 | drm_ctx_t __user *argp = (void __user *)arg; | |
377 | drm_ctx_t ctx; | |
378 | int i; | |
379 | ||
b5e89ed5 | 380 | if (copy_from_user(&res, argp, sizeof(res))) |
1da177e4 LT |
381 | return -EFAULT; |
382 | ||
b5e89ed5 DA |
383 | if (res.count >= DRM_RESERVED_CONTEXTS) { |
384 | memset(&ctx, 0, sizeof(ctx)); | |
385 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { | |
1da177e4 | 386 | ctx.handle = i; |
b5e89ed5 | 387 | if (copy_to_user(&res.contexts[i], &ctx, sizeof(ctx))) |
1da177e4 LT |
388 | return -EFAULT; |
389 | } | |
390 | } | |
391 | res.count = DRM_RESERVED_CONTEXTS; | |
392 | ||
b5e89ed5 | 393 | if (copy_to_user(argp, &res, sizeof(res))) |
1da177e4 LT |
394 | return -EFAULT; |
395 | return 0; | |
396 | } | |
397 | ||
398 | /** | |
399 | * Add context. | |
400 | * | |
401 | * \param inode device inode. | |
402 | * \param filp file pointer. | |
403 | * \param cmd command. | |
404 | * \param arg user argument pointing to a drm_ctx structure. | |
405 | * \return zero on success or a negative number on failure. | |
406 | * | |
407 | * Get a new handle for the context and copy to userspace. | |
408 | */ | |
b5e89ed5 DA |
409 | int drm_addctx(struct inode *inode, struct file *filp, |
410 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
411 | { |
412 | drm_file_t *priv = filp->private_data; | |
413 | drm_device_t *dev = priv->head->dev; | |
b5e89ed5 | 414 | drm_ctx_list_t *ctx_entry; |
1da177e4 LT |
415 | drm_ctx_t __user *argp = (void __user *)arg; |
416 | drm_ctx_t ctx; | |
417 | ||
b5e89ed5 | 418 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
1da177e4 LT |
419 | return -EFAULT; |
420 | ||
b5e89ed5 DA |
421 | ctx.handle = drm_ctxbitmap_next(dev); |
422 | if (ctx.handle == DRM_KERNEL_CONTEXT) { | |
423 | /* Skip kernel's context and get a new one. */ | |
424 | ctx.handle = drm_ctxbitmap_next(dev); | |
1da177e4 | 425 | } |
b5e89ed5 DA |
426 | DRM_DEBUG("%d\n", ctx.handle); |
427 | if (ctx.handle == -1) { | |
428 | DRM_DEBUG("Not enough free contexts.\n"); | |
429 | /* Should this return -EBUSY instead? */ | |
1da177e4 LT |
430 | return -ENOMEM; |
431 | } | |
432 | ||
b5e89ed5 | 433 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
1da177e4 LT |
434 | if (dev->driver->context_ctor) |
435 | dev->driver->context_ctor(dev, ctx.handle); | |
436 | } | |
437 | ||
b5e89ed5 DA |
438 | ctx_entry = drm_alloc(sizeof(*ctx_entry), DRM_MEM_CTXLIST); |
439 | if (!ctx_entry) { | |
1da177e4 LT |
440 | DRM_DEBUG("out of memory\n"); |
441 | return -ENOMEM; | |
442 | } | |
443 | ||
b5e89ed5 | 444 | INIT_LIST_HEAD(&ctx_entry->head); |
1da177e4 LT |
445 | ctx_entry->handle = ctx.handle; |
446 | ctx_entry->tag = priv; | |
447 | ||
b5e89ed5 DA |
448 | down(&dev->ctxlist_sem); |
449 | list_add(&ctx_entry->head, &dev->ctxlist->head); | |
1da177e4 | 450 | ++dev->ctx_count; |
b5e89ed5 | 451 | up(&dev->ctxlist_sem); |
1da177e4 | 452 | |
b5e89ed5 | 453 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
1da177e4 LT |
454 | return -EFAULT; |
455 | return 0; | |
456 | } | |
457 | ||
b5e89ed5 DA |
458 | int drm_modctx(struct inode *inode, struct file *filp, |
459 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
460 | { |
461 | /* This does nothing */ | |
462 | return 0; | |
463 | } | |
464 | ||
465 | /** | |
466 | * Get context. | |
467 | * | |
468 | * \param inode device inode. | |
469 | * \param filp file pointer. | |
470 | * \param cmd command. | |
471 | * \param arg user argument pointing to a drm_ctx structure. | |
472 | * \return zero on success or a negative number on failure. | |
473 | */ | |
b5e89ed5 DA |
474 | int drm_getctx(struct inode *inode, struct file *filp, |
475 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
476 | { |
477 | drm_ctx_t __user *argp = (void __user *)arg; | |
478 | drm_ctx_t ctx; | |
479 | ||
b5e89ed5 | 480 | if (copy_from_user(&ctx, argp, sizeof(ctx))) |
1da177e4 LT |
481 | return -EFAULT; |
482 | ||
483 | /* This is 0, because we don't handle any context flags */ | |
484 | ctx.flags = 0; | |
485 | ||
b5e89ed5 | 486 | if (copy_to_user(argp, &ctx, sizeof(ctx))) |
1da177e4 LT |
487 | return -EFAULT; |
488 | return 0; | |
489 | } | |
490 | ||
491 | /** | |
492 | * Switch context. | |
493 | * | |
494 | * \param inode device inode. | |
495 | * \param filp file pointer. | |
496 | * \param cmd command. | |
497 | * \param arg user argument pointing to a drm_ctx structure. | |
498 | * \return zero on success or a negative number on failure. | |
499 | * | |
500 | * Calls context_switch(). | |
501 | */ | |
b5e89ed5 DA |
502 | int drm_switchctx(struct inode *inode, struct file *filp, |
503 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
504 | { |
505 | drm_file_t *priv = filp->private_data; | |
506 | drm_device_t *dev = priv->head->dev; | |
507 | drm_ctx_t ctx; | |
508 | ||
b5e89ed5 | 509 | if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx))) |
1da177e4 LT |
510 | return -EFAULT; |
511 | ||
b5e89ed5 DA |
512 | DRM_DEBUG("%d\n", ctx.handle); |
513 | return drm_context_switch(dev, dev->last_context, ctx.handle); | |
1da177e4 LT |
514 | } |
515 | ||
516 | /** | |
517 | * New context. | |
518 | * | |
519 | * \param inode device inode. | |
520 | * \param filp file pointer. | |
521 | * \param cmd command. | |
522 | * \param arg user argument pointing to a drm_ctx structure. | |
523 | * \return zero on success or a negative number on failure. | |
524 | * | |
525 | * Calls context_switch_complete(). | |
526 | */ | |
b5e89ed5 DA |
527 | int drm_newctx(struct inode *inode, struct file *filp, |
528 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
529 | { |
530 | drm_file_t *priv = filp->private_data; | |
531 | drm_device_t *dev = priv->head->dev; | |
532 | drm_ctx_t ctx; | |
533 | ||
b5e89ed5 | 534 | if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx))) |
1da177e4 LT |
535 | return -EFAULT; |
536 | ||
b5e89ed5 DA |
537 | DRM_DEBUG("%d\n", ctx.handle); |
538 | drm_context_switch_complete(dev, ctx.handle); | |
1da177e4 LT |
539 | |
540 | return 0; | |
541 | } | |
542 | ||
543 | /** | |
544 | * Remove context. | |
545 | * | |
546 | * \param inode device inode. | |
547 | * \param filp file pointer. | |
548 | * \param cmd command. | |
549 | * \param arg user argument pointing to a drm_ctx structure. | |
550 | * \return zero on success or a negative number on failure. | |
551 | * | |
552 | * If not the special kernel context, calls ctxbitmap_free() to free the specified context. | |
553 | */ | |
b5e89ed5 DA |
554 | int drm_rmctx(struct inode *inode, struct file *filp, |
555 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
556 | { |
557 | drm_file_t *priv = filp->private_data; | |
558 | drm_device_t *dev = priv->head->dev; | |
559 | drm_ctx_t ctx; | |
560 | ||
b5e89ed5 | 561 | if (copy_from_user(&ctx, (drm_ctx_t __user *) arg, sizeof(ctx))) |
1da177e4 LT |
562 | return -EFAULT; |
563 | ||
b5e89ed5 DA |
564 | DRM_DEBUG("%d\n", ctx.handle); |
565 | if (ctx.handle == DRM_KERNEL_CONTEXT + 1) { | |
1da177e4 LT |
566 | priv->remove_auth_on_close = 1; |
567 | } | |
b5e89ed5 | 568 | if (ctx.handle != DRM_KERNEL_CONTEXT) { |
1da177e4 LT |
569 | if (dev->driver->context_dtor) |
570 | dev->driver->context_dtor(dev, ctx.handle); | |
b5e89ed5 | 571 | drm_ctxbitmap_free(dev, ctx.handle); |
1da177e4 LT |
572 | } |
573 | ||
b5e89ed5 DA |
574 | down(&dev->ctxlist_sem); |
575 | if (!list_empty(&dev->ctxlist->head)) { | |
1da177e4 LT |
576 | drm_ctx_list_t *pos, *n; |
577 | ||
b5e89ed5 DA |
578 | list_for_each_entry_safe(pos, n, &dev->ctxlist->head, head) { |
579 | if (pos->handle == ctx.handle) { | |
580 | list_del(&pos->head); | |
581 | drm_free(pos, sizeof(*pos), DRM_MEM_CTXLIST); | |
1da177e4 LT |
582 | --dev->ctx_count; |
583 | } | |
584 | } | |
585 | } | |
b5e89ed5 | 586 | up(&dev->ctxlist_sem); |
1da177e4 LT |
587 | |
588 | return 0; | |
589 | } | |
590 | ||
591 | /*@}*/ |