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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / gpu / drm / drm_drv.c
blob84da748555bc824379d1b49733db1444f33fc8d5
1 /**
2 * \file drm_drv.c
3 * Generic driver template
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 *
8 * To use this template, you must at least define the following (samples
9 * given for the MGA driver):
10 *
11 * \code
12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc."
13 *
14 * #define DRIVER_NAME "mga"
15 * #define DRIVER_DESC "Matrox G200/G400"
16 * #define DRIVER_DATE "20001127"
17 *
18 * #define drm_x mga_##x
19 * \endcode
20 */
21
22 /*
23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
24 *
25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
27 * All Rights Reserved.
28 *
29 * Permission is hereby granted, free of charge, to any person obtaining a
30 * copy of this software and associated documentation files (the "Software"),
31 * to deal in the Software without restriction, including without limitation
32 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
33 * and/or sell copies of the Software, and to permit persons to whom the
34 * Software is furnished to do so, subject to the following conditions:
35 *
36 * The above copyright notice and this permission notice (including the next
37 * paragraph) shall be included in all copies or substantial portions of the
38 * Software.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
41 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
43 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
44 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
46 * OTHER DEALINGS IN THE SOFTWARE.
47 */
48
49 #include <linux/debugfs.h>
50 #include <linux/slab.h>
51 #include "drmP.h"
52 #include "drm_core.h"
53
54
55 static int drm_version(struct drm_device *dev, void *data,
56 struct drm_file *file_priv);
57
58 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
59 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0}
60
61 /** Ioctl table */
62 static struct drm_ioctl_desc drm_ioctls[] = {
63 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
64 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
65 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
66 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
67 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
68 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
69 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
70 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
71
72 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
73 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
74 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
75 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
76
77 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
78 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
79
80 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
81 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
82
83 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
84 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
85
86 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
87 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
88 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
89 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
90 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
91 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
92 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
93
94 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
95 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
96
97 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
98 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
99
100 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
101
102 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
103 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
104 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
105 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
106 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
107 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
108 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),
109
110 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
111
112 #if __OS_HAS_AGP
113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
115 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
116 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
117 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
118 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
119 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
120 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
121 #endif
122
123 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
124 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
125
126 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),
127
128 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
129
130 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
131
132 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
133 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
134 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
135
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW|DRM_UNLOCKED),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED)
154 };
155
156 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
157
158 /**
159 * Take down the DRM device.
160 *
161 * \param dev DRM device structure.
162 *
163 * Frees every resource in \p dev.
164 *
165 * \sa drm_device
166 */
167 int drm_lastclose(struct drm_device * dev)
168 {
169 struct drm_vma_entry *vma, *vma_temp;
170 int i;
171
172 DRM_DEBUG("\n");
173
174 if (dev->driver->lastclose)
175 dev->driver->lastclose(dev);
176 DRM_DEBUG("driver lastclose completed\n");
177
178 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
179 drm_irq_uninstall(dev);
180
181 mutex_lock(&dev->struct_mutex);
182
183 /* Free drawable information memory */
184 drm_drawable_free_all(dev);
185 del_timer(&dev->timer);
186
187 /* Clear AGP information */
188 if (drm_core_has_AGP(dev) && dev->agp &&
189 !drm_core_check_feature(dev, DRIVER_MODESET)) {
190 struct drm_agp_mem *entry, *tempe;
191
192 /* Remove AGP resources, but leave dev->agp
193 intact until drv_cleanup is called. */
194 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
195 if (entry->bound)
196 drm_unbind_agp(entry->memory);
197 drm_free_agp(entry->memory, entry->pages);
198 kfree(entry);
199 }
200 INIT_LIST_HEAD(&dev->agp->memory);
201
202 if (dev->agp->acquired)
203 drm_agp_release(dev);
204
205 dev->agp->acquired = 0;
206 dev->agp->enabled = 0;
207 }
208 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg &&
209 !drm_core_check_feature(dev, DRIVER_MODESET)) {
210 drm_sg_cleanup(dev->sg);
211 dev->sg = NULL;
212 }
213
214 /* Clear vma list (only built for debugging) */
215 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
216 list_del(&vma->head);
217 kfree(vma);
218 }
219
220 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
221 for (i = 0; i < dev->queue_count; i++) {
222 kfree(dev->queuelist[i]);
223 dev->queuelist[i] = NULL;
224 }
225 kfree(dev->queuelist);
226 dev->queuelist = NULL;
227 }
228 dev->queue_count = 0;
229
230 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
231 !drm_core_check_feature(dev, DRIVER_MODESET))
232 drm_dma_takedown(dev);
233
234 dev->dev_mapping = NULL;
235 mutex_unlock(&dev->struct_mutex);
236
237 DRM_DEBUG("lastclose completed\n");
238 return 0;
239 }
240
241 /**
242 * Module initialization. Called via init_module at module load time, or via
243 * linux/init/main.c (this is not currently supported).
244 *
245 * \return zero on success or a negative number on failure.
246 *
247 * Initializes an array of drm_device structures, and attempts to
248 * initialize all available devices, using consecutive minors, registering the
249 * stubs and initializing the device.
250 *
251 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
252 * after the initialization for driver customization.
253 */
254 int drm_init(struct drm_driver *driver)
255 {
256 DRM_DEBUG("\n");
257 INIT_LIST_HEAD(&driver->device_list);
258
259 if (driver->driver_features & DRIVER_USE_PLATFORM_DEVICE)
260 return drm_platform_init(driver);
261 else
262 return drm_pci_init(driver);
263 }
264
265 EXPORT_SYMBOL(drm_init);
266
267 void drm_exit(struct drm_driver *driver)
268 {
269 struct drm_device *dev, *tmp;
270 DRM_DEBUG("\n");
271
272 if (driver->driver_features & DRIVER_MODESET) {
273 pci_unregister_driver(&driver->pci_driver);
274 } else {
275 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)
276 drm_put_dev(dev);
277 }
278
279 DRM_INFO("Module unloaded\n");
280 }
281
282 EXPORT_SYMBOL(drm_exit);
283
284 /** File operations structure */
285 static const struct file_operations drm_stub_fops = {
286 .owner = THIS_MODULE,
287 .open = drm_stub_open
288 };
289
290 static int __init drm_core_init(void)
291 {
292 int ret = -ENOMEM;
293
294 drm_global_init();
295 idr_init(&drm_minors_idr);
296
297 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
298 goto err_p1;
299
300 drm_class = drm_sysfs_create(THIS_MODULE, "drm");
301 if (IS_ERR(drm_class)) {
302 printk(KERN_ERR "DRM: Error creating drm class.\n");
303 ret = PTR_ERR(drm_class);
304 goto err_p2;
305 }
306
307 drm_proc_root = proc_mkdir("dri", NULL);
308 if (!drm_proc_root) {
309 DRM_ERROR("Cannot create /proc/dri\n");
310 ret = -1;
311 goto err_p3;
312 }
313
314 drm_debugfs_root = debugfs_create_dir("dri", NULL);
315 if (!drm_debugfs_root) {
316 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
317 ret = -1;
318 goto err_p3;
319 }
320
321 DRM_INFO("Initialized %s %d.%d.%d %s\n",
322 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
323 return 0;
324 err_p3:
325 drm_sysfs_destroy();
326 err_p2:
327 unregister_chrdev(DRM_MAJOR, "drm");
328
329 idr_destroy(&drm_minors_idr);
330 err_p1:
331 return ret;
332 }
333
334 static void __exit drm_core_exit(void)
335 {
336 remove_proc_entry("dri", NULL);
337 debugfs_remove(drm_debugfs_root);
338 drm_sysfs_destroy();
339
340 unregister_chrdev(DRM_MAJOR, "drm");
341
342 idr_remove_all(&drm_minors_idr);
343 idr_destroy(&drm_minors_idr);
344 }
345
346 module_init(drm_core_init);
347 module_exit(drm_core_exit);
348
349 /**
350 * Copy and IOCTL return string to user space
351 */
352 static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
353 {
354 int len;
355
356 /* don't overflow userbuf */
357 len = strlen(value);
358 if (len > *buf_len)
359 len = *buf_len;
360
361 /* let userspace know exact length of driver value (which could be
362 * larger than the userspace-supplied buffer) */
363 *buf_len = strlen(value);
364
365 /* finally, try filling in the userbuf */
366 if (len && buf)
367 if (copy_to_user(buf, value, len))
368 return -EFAULT;
369 return 0;
370 }
371
372 /**
373 * Get version information
374 *
375 * \param inode device inode.
376 * \param filp file pointer.
377 * \param cmd command.
378 * \param arg user argument, pointing to a drm_version structure.
379 * \return zero on success or negative number on failure.
380 *
381 * Fills in the version information in \p arg.
382 */
383 static int drm_version(struct drm_device *dev, void *data,
384 struct drm_file *file_priv)
385 {
386 struct drm_version *version = data;
387 int err;
388
389 version->version_major = dev->driver->major;
390 version->version_minor = dev->driver->minor;
391 version->version_patchlevel = dev->driver->patchlevel;
392 err = drm_copy_field(version->name, &version->name_len,
393 dev->driver->name);
394 if (!err)
395 err = drm_copy_field(version->date, &version->date_len,
396 dev->driver->date);
397 if (!err)
398 err = drm_copy_field(version->desc, &version->desc_len,
399 dev->driver->desc);
400
401 return err;
402 }
403
404 /**
405 * Called whenever a process performs an ioctl on /dev/drm.
406 *
407 * \param inode device inode.
408 * \param file_priv DRM file private.
409 * \param cmd command.
410 * \param arg user argument.
411 * \return zero on success or negative number on failure.
412 *
413 * Looks up the ioctl function in the ::ioctls table, checking for root
414 * previleges if so required, and dispatches to the respective function.
415 */
416 long drm_ioctl(struct file *filp,
417 unsigned int cmd, unsigned long arg)
418 {
419 struct drm_file *file_priv = filp->private_data;
420 struct drm_device *dev;
421 struct drm_ioctl_desc *ioctl;
422 drm_ioctl_t *func;
423 unsigned int nr = DRM_IOCTL_NR(cmd);
424 int retcode = -EINVAL;
425 char stack_kdata[128];
426 char *kdata = NULL;
427 unsigned int usize, asize;
428
429 dev = file_priv->minor->dev;
430 atomic_inc(&dev->ioctl_count);
431 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
432 ++file_priv->ioctl_count;
433
434 DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
435 task_pid_nr(current), cmd, nr,
436 (long)old_encode_dev(file_priv->minor->device),
437 file_priv->authenticated);
438
439 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
440 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
441 goto err_i1;
442 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
443 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
444 u32 drv_size;
445 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
446 drv_size = _IOC_SIZE(ioctl->cmd_drv);
447 usize = asize = _IOC_SIZE(cmd);
448 if (drv_size > asize)
449 asize = drv_size;
450 }
451 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
452 ioctl = &drm_ioctls[nr];
453 cmd = ioctl->cmd;
454 usize = asize = _IOC_SIZE(cmd);
455 } else
456 goto err_i1;
457
458 /* Do not trust userspace, use our own definition */
459 func = ioctl->func;
460 /* is there a local override? */
461 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
462 func = dev->driver->dma_ioctl;
463
464 if (!func) {
465 DRM_DEBUG("no function\n");
466 retcode = -EINVAL;
467 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
468 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
469 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) ||
470 (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) {
471 retcode = -EACCES;
472 } else {
473 if (cmd & (IOC_IN | IOC_OUT)) {
474 if (asize <= sizeof(stack_kdata)) {
475 kdata = stack_kdata;
476 } else {
477 kdata = kmalloc(asize, GFP_KERNEL);
478 if (!kdata) {
479 retcode = -ENOMEM;
480 goto err_i1;
481 }
482 }
483 }
484
485 if (cmd & IOC_IN) {
486 if (copy_from_user(kdata, (void __user *)arg,
487 usize) != 0) {
488 retcode = -EFAULT;
489 goto err_i1;
490 }
491 } else
492 memset(kdata, 0, usize);
493
494 if (ioctl->flags & DRM_UNLOCKED)
495 retcode = func(dev, kdata, file_priv);
496 else {
497 mutex_lock(&drm_global_mutex);
498 retcode = func(dev, kdata, file_priv);
499 mutex_unlock(&drm_global_mutex);
500 }
501
502 if (cmd & IOC_OUT) {
503 if (copy_to_user((void __user *)arg, kdata,
504 usize) != 0)
505 retcode = -EFAULT;
506 }
507 }
508
509 err_i1:
510 if (kdata != stack_kdata)
511 kfree(kdata);
512 atomic_dec(&dev->ioctl_count);
513 if (retcode)
514 DRM_DEBUG("ret = %x\n", retcode);
515 return retcode;
516 }
517
518 EXPORT_SYMBOL(drm_ioctl);
519
520 struct drm_local_map *drm_getsarea(struct drm_device *dev)
521 {
522 struct drm_map_list *entry;
523
524 list_for_each_entry(entry, &dev->maplist, head) {
525 if (entry->map && entry->map->type == _DRM_SHM &&
526 (entry->map->flags & _DRM_CONTAINS_LOCK)) {
527 return entry->map;
528 }
529 }
530 return NULL;
531 }
532 EXPORT_SYMBOL(drm_getsarea);
Tomato firmware and modifications.