blob: 2607753a320bfb84b7bf8caafafe7856f4cfc0b8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
Dave Airlieb5e89ed2005-09-25 14:28:13 +10002 * \file drm_context.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * IOCTLs for generic contexts
Dave Airlieb5e89ed2005-09-25 14:28:13 +10004 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * \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 Airlie62968142007-07-17 10:46:52 +100056 * in drm_device::ctx_idr, while holding the drm_device::struct_mutex
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 * lock.
58 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100059void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
Dave Airlie62968142007-07-17 10:46:52 +100061 mutex_lock(&dev->struct_mutex);
62 idr_remove(&dev->ctx_idr, ctx_handle);
63 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064}
65
Dave Airlieb5e89ed2005-09-25 14:28:13 +100066/**
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 * 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 Airlie62968142007-07-17 10:46:52 +100072 * Allocate a new idr from drm_device::ctx_idr while holding the
Dave Airlie30e2fb12006-02-02 19:37:46 +110073 * drm_device::struct_mutex lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 */
Dave Airlie84b1fd12007-07-11 15:53:27 +100075static int drm_ctxbitmap_next(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076{
Dave Airlie62968142007-07-17 10:46:52 +100077 int new_id;
78 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Dave Airlie62968142007-07-17 10:46:52 +100080again:
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 Airlie30e2fb12006-02-02 19:37:46 +110085 mutex_lock(&dev->struct_mutex);
Dave Airlie62968142007-07-17 10:46:52 +100086 ret = idr_get_new_above(&dev->ctx_idr, NULL,
87 DRM_RESERVED_CONTEXTS, &new_id);
88 if (ret == -EAGAIN) {
Dave Airlie30e2fb12006-02-02 19:37:46 +110089 mutex_unlock(&dev->struct_mutex);
Dave Airlie62968142007-07-17 10:46:52 +100090 goto again;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 }
Dave Airlie30e2fb12006-02-02 19:37:46 +110092 mutex_unlock(&dev->struct_mutex);
Dave Airlie62968142007-07-17 10:46:52 +100093 return new_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094}
95
96/**
97 * Context bitmap initialization.
98 *
99 * \param dev DRM device.
100 *
Dave Airlie62968142007-07-17 10:46:52 +1000101 * Initialise the drm_device::ctx_idr
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000103int drm_ctxbitmap_init(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
Dave Airlie62968142007-07-17 10:46:52 +1000105 idr_init(&dev->ctx_idr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 return 0;
107}
108
109/**
110 * Context bitmap cleanup.
111 *
112 * \param dev DRM device.
113 *
Dave Airlie62968142007-07-17 10:46:52 +1000114 * Free all idr members using drm_ctx_sarea_free helper function
115 * while holding the drm_device::struct_mutex lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000117void drm_ctxbitmap_cleanup(struct drm_device * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
Dave Airlie30e2fb12006-02-02 19:37:46 +1100119 mutex_lock(&dev->struct_mutex);
Dave Airlie62968142007-07-17 10:46:52 +1000120 idr_remove_all(&dev->ctx_idr);
Dave Airlie30e2fb12006-02-02 19:37:46 +1100121 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122}
123
124/*@}*/
125
126/******************************************************************/
127/** \name Per Context SAREA Support */
128/*@{*/
129
130/**
131 * Get per-context SAREA.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000132 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000134 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 * \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 Airlie62968142007-07-17 10:46:52 +1000139 * Gets the map from drm_device::ctx_idr with the handle specified and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 * returns its handle.
141 */
Eric Anholtc153f452007-09-03 12:06:45 +1000142int drm_getsareactx(struct drm_device *dev, void *data,
143 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
Eric Anholtc153f452007-09-03 12:06:45 +1000145 struct drm_ctx_priv_map *request = data;
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +1100146 struct drm_local_map *map;
Dave Airlie55910512007-07-11 16:53:40 +1000147 struct drm_map_list *_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Dave Airlie30e2fb12006-02-02 19:37:46 +1100149 mutex_lock(&dev->struct_mutex);
Dave Airlie62968142007-07-17 10:46:52 +1000150
Eric Anholtc153f452007-09-03 12:06:45 +1000151 map = idr_find(&dev->ctx_idr, request->ctx_id);
Dave Airlie62968142007-07-17 10:46:52 +1000152 if (!map) {
Dave Airlie30e2fb12006-02-02 19:37:46 +1100153 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 return -EINVAL;
155 }
156
Dave Airlie30e2fb12006-02-02 19:37:46 +1100157 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Eric Anholtc153f452007-09-03 12:06:45 +1000159 request->handle = NULL;
Dave Airliebd1b3312007-05-26 05:01:51 +1000160 list_for_each_entry(_entry, &dev->maplist, head) {
Dave Airlied1f2b552005-08-05 22:11:22 +1000161 if (_entry->map == map) {
Dave Airliebc5f4522007-11-05 12:50:58 +1000162 request->handle =
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000163 (void *)(unsigned long)_entry->user_token;
Dave Airlied1f2b552005-08-05 22:11:22 +1000164 break;
165 }
166 }
Eric Anholtc153f452007-09-03 12:06:45 +1000167 if (request->handle == NULL)
Dave Airlied1f2b552005-08-05 22:11:22 +1000168 return -EINVAL;
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 return 0;
171}
172
173/**
174 * Set per-context SAREA.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000175 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000177 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 * \param cmd command.
179 * \param arg user argument pointing to a drm_ctx_priv_map structure.
180 * \return zero on success or a negative number on failure.
181 *
182 * Searches the mapping specified in \p arg and update the entry in
Dave Airlie62968142007-07-17 10:46:52 +1000183 * drm_device::ctx_idr with it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 */
Eric Anholtc153f452007-09-03 12:06:45 +1000185int drm_setsareactx(struct drm_device *dev, void *data,
186 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
Eric Anholtc153f452007-09-03 12:06:45 +1000188 struct drm_ctx_priv_map *request = data;
Benjamin Herrenschmidtf77d3902009-02-02 16:55:46 +1100189 struct drm_local_map *map = NULL;
Dave Airlie55910512007-07-11 16:53:40 +1000190 struct drm_map_list *r_list = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Dave Airlie30e2fb12006-02-02 19:37:46 +1100192 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000193 list_for_each_entry(r_list, &dev->maplist, head) {
Dave Airlie9a186642005-06-23 21:29:18 +1000194 if (r_list->map
Eric Anholtc153f452007-09-03 12:06:45 +1000195 && r_list->user_token == (unsigned long) request->handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 goto found;
197 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000198 bad:
Dave Airlie30e2fb12006-02-02 19:37:46 +1100199 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 return -EINVAL;
201
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000202 found:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 map = r_list->map;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000204 if (!map)
205 goto bad;
Dave Airlie62968142007-07-17 10:46:52 +1000206
Eric Anholtc153f452007-09-03 12:06:45 +1000207 if (IS_ERR(idr_replace(&dev->ctx_idr, map, request->ctx_id)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 goto bad;
Dave Airlie62968142007-07-17 10:46:52 +1000209
Dave Airlie30e2fb12006-02-02 19:37:46 +1100210 mutex_unlock(&dev->struct_mutex);
Eric Anholtc153f452007-09-03 12:06:45 +1000211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 return 0;
213}
214
215/*@}*/
216
217/******************************************************************/
218/** \name The actual DRM context handling routines */
219/*@{*/
220
221/**
222 * Switch context.
223 *
224 * \param dev DRM device.
225 * \param old old context handle.
226 * \param new new context handle.
227 * \return zero on success or a negative number on failure.
228 *
229 * Attempt to set drm_device::context_flag.
230 */
Dave Airlie84b1fd12007-07-11 15:53:27 +1000231static int drm_context_switch(struct drm_device * dev, int old, int new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000233 if (test_and_set_bit(0, &dev->context_flag)) {
234 DRM_ERROR("Reentering -- FIXME\n");
235 return -EBUSY;
236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000238 DRM_DEBUG("Context switch from %d to %d\n", old, new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000240 if (new == dev->last_context) {
241 clear_bit(0, &dev->context_flag);
242 return 0;
243 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000245 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
248/**
249 * Complete context switch.
250 *
251 * \param dev DRM device.
252 * \param new new context handle.
253 * \return zero on success or a negative number on failure.
254 *
255 * Updates drm_device::last_context and drm_device::last_switch. Verifies the
256 * hardware lock is held, clears the drm_device::context_flag and wakes up
257 * drm_device::context_wait.
258 */
Dave Airlie7c1c2872008-11-28 14:22:24 +1000259static int drm_context_switch_complete(struct drm_device *dev,
260 struct drm_file *file_priv, int new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000262 dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
263 dev->last_switch = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Dave Airlie7c1c2872008-11-28 14:22:24 +1000265 if (!_DRM_LOCK_IS_HELD(file_priv->master->lock.hw_lock->lock)) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000266 DRM_ERROR("Lock isn't held after context switch\n");
267 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000269 /* If a context switch is ever initiated
270 when the kernel holds the lock, release
271 that lock here. */
272 clear_bit(0, &dev->context_flag);
273 wake_up(&dev->context_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000275 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276}
277
278/**
279 * Reserve contexts.
280 *
281 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000282 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 * \param cmd command.
284 * \param arg user argument pointing to a drm_ctx_res structure.
285 * \return zero on success or a negative number on failure.
286 */
Eric Anholtc153f452007-09-03 12:06:45 +1000287int drm_resctx(struct drm_device *dev, void *data,
288 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
Eric Anholtc153f452007-09-03 12:06:45 +1000290 struct drm_ctx_res *res = data;
Dave Airliec60ce622007-07-11 15:27:12 +1000291 struct drm_ctx ctx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 int i;
293
Eric Anholtc153f452007-09-03 12:06:45 +1000294 if (res->count >= DRM_RESERVED_CONTEXTS) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000295 memset(&ctx, 0, sizeof(ctx));
296 for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 ctx.handle = i;
Eric Anholtc153f452007-09-03 12:06:45 +1000298 if (copy_to_user(&res->contexts[i], &ctx, sizeof(ctx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return -EFAULT;
300 }
301 }
Eric Anholtc153f452007-09-03 12:06:45 +1000302 res->count = DRM_RESERVED_CONTEXTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 return 0;
305}
306
307/**
308 * Add context.
309 *
310 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000311 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 * \param cmd command.
313 * \param arg user argument pointing to a drm_ctx structure.
314 * \return zero on success or a negative number on failure.
315 *
316 * Get a new handle for the context and copy to userspace.
317 */
Eric Anholtc153f452007-09-03 12:06:45 +1000318int drm_addctx(struct drm_device *dev, void *data,
319 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
Dave Airlie55910512007-07-11 16:53:40 +1000321 struct drm_ctx_list *ctx_entry;
Eric Anholtc153f452007-09-03 12:06:45 +1000322 struct drm_ctx *ctx = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Eric Anholtc153f452007-09-03 12:06:45 +1000324 ctx->handle = drm_ctxbitmap_next(dev);
325 if (ctx->handle == DRM_KERNEL_CONTEXT) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000326 /* Skip kernel's context and get a new one. */
Eric Anholtc153f452007-09-03 12:06:45 +1000327 ctx->handle = drm_ctxbitmap_next(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 }
Eric Anholtc153f452007-09-03 12:06:45 +1000329 DRM_DEBUG("%d\n", ctx->handle);
330 if (ctx->handle == -1) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000331 DRM_DEBUG("Not enough free contexts.\n");
332 /* Should this return -EBUSY instead? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 return -ENOMEM;
334 }
335
Eric Anholtc153f452007-09-03 12:06:45 +1000336 if (ctx->handle != DRM_KERNEL_CONTEXT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 if (dev->driver->context_ctor)
Eric Anholtc153f452007-09-03 12:06:45 +1000338 if (!dev->driver->context_ctor(dev, ctx->handle)) {
Dave Airlieb5e9fc12006-01-02 19:23:44 +1100339 DRM_DEBUG("Running out of ctxs or memory.\n");
340 return -ENOMEM;
341 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 }
343
Eric Anholt9a298b22009-03-24 12:23:04 -0700344 ctx_entry = kmalloc(sizeof(*ctx_entry), GFP_KERNEL);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000345 if (!ctx_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 DRM_DEBUG("out of memory\n");
347 return -ENOMEM;
348 }
349
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000350 INIT_LIST_HEAD(&ctx_entry->head);
Eric Anholtc153f452007-09-03 12:06:45 +1000351 ctx_entry->handle = ctx->handle;
Eric Anholt6c340ea2007-08-25 20:23:09 +1000352 ctx_entry->tag = file_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Dave Airlie30e2fb12006-02-02 19:37:46 +1100354 mutex_lock(&dev->ctxlist_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000355 list_add(&ctx_entry->head, &dev->ctxlist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 ++dev->ctx_count;
Dave Airlie30e2fb12006-02-02 19:37:46 +1100357 mutex_unlock(&dev->ctxlist_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 return 0;
360}
361
Eric Anholtc153f452007-09-03 12:06:45 +1000362int drm_modctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{
364 /* This does nothing */
365 return 0;
366}
367
368/**
369 * Get context.
370 *
371 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000372 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 * \param cmd command.
374 * \param arg user argument pointing to a drm_ctx structure.
375 * \return zero on success or a negative number on failure.
376 */
Eric Anholtc153f452007-09-03 12:06:45 +1000377int drm_getctx(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
Eric Anholtc153f452007-09-03 12:06:45 +1000379 struct drm_ctx *ctx = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 /* This is 0, because we don't handle any context flags */
Eric Anholtc153f452007-09-03 12:06:45 +1000382 ctx->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 return 0;
385}
386
387/**
388 * Switch context.
389 *
390 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000391 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 * \param cmd command.
393 * \param arg user argument pointing to a drm_ctx structure.
394 * \return zero on success or a negative number on failure.
395 *
396 * Calls context_switch().
397 */
Eric Anholtc153f452007-09-03 12:06:45 +1000398int drm_switchctx(struct drm_device *dev, void *data,
399 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Eric Anholtc153f452007-09-03 12:06:45 +1000401 struct drm_ctx *ctx = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Eric Anholtc153f452007-09-03 12:06:45 +1000403 DRM_DEBUG("%d\n", ctx->handle);
404 return drm_context_switch(dev, dev->last_context, ctx->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405}
406
407/**
408 * New context.
409 *
410 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000411 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 * \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 *
416 * Calls context_switch_complete().
417 */
Eric Anholtc153f452007-09-03 12:06:45 +1000418int drm_newctx(struct drm_device *dev, void *data,
419 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420{
Eric Anholtc153f452007-09-03 12:06:45 +1000421 struct drm_ctx *ctx = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Eric Anholtc153f452007-09-03 12:06:45 +1000423 DRM_DEBUG("%d\n", ctx->handle);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000424 drm_context_switch_complete(dev, file_priv, ctx->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426 return 0;
427}
428
429/**
430 * Remove context.
431 *
432 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000433 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 * \param cmd command.
435 * \param arg user argument pointing to a drm_ctx structure.
436 * \return zero on success or a negative number on failure.
437 *
438 * If not the special kernel context, calls ctxbitmap_free() to free the specified context.
439 */
Eric Anholtc153f452007-09-03 12:06:45 +1000440int drm_rmctx(struct drm_device *dev, void *data,
441 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442{
Eric Anholtc153f452007-09-03 12:06:45 +1000443 struct drm_ctx *ctx = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Eric Anholtc153f452007-09-03 12:06:45 +1000445 DRM_DEBUG("%d\n", ctx->handle);
Eric Anholtc153f452007-09-03 12:06:45 +1000446 if (ctx->handle != DRM_KERNEL_CONTEXT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 if (dev->driver->context_dtor)
Eric Anholtc153f452007-09-03 12:06:45 +1000448 dev->driver->context_dtor(dev, ctx->handle);
449 drm_ctxbitmap_free(dev, ctx->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
451
Dave Airlie30e2fb12006-02-02 19:37:46 +1100452 mutex_lock(&dev->ctxlist_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000453 if (!list_empty(&dev->ctxlist)) {
Dave Airlie55910512007-07-11 16:53:40 +1000454 struct drm_ctx_list *pos, *n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Dave Airliebd1b3312007-05-26 05:01:51 +1000456 list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
Eric Anholtc153f452007-09-03 12:06:45 +1000457 if (pos->handle == ctx->handle) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000458 list_del(&pos->head);
Eric Anholt9a298b22009-03-24 12:23:04 -0700459 kfree(pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 --dev->ctx_count;
461 }
462 }
463 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100464 mutex_unlock(&dev->ctxlist_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466 return 0;
467}
468
469/*@}*/