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 "drmP.h"
50 #include "drm_core.h"
51
52 static int drm_version(struct drm_device *dev, void *data,
53 struct drm_file *file_priv);
54
55 /** Ioctl table */
56 static struct drm_ioctl_desc drm_ioctls[] = {
57 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
58 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
59 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
60 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
61 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
62 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
63 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
64 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
65
66 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
67 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
68 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
69 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
70
71 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
72 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
73
74 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
75 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
76
77 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
78 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
79
80 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
81 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
82 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
83 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
84 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
85 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
86 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
87
88 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
89 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
90
91 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
92 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
93
94 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
95
96 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
97 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
98 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
99 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
100 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
101 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
102 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),
103
104 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
105
106 #if __OS_HAS_AGP
107 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
108 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
109 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
110 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
111 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
112 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
115 #endif
116
117 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
118 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
119
120 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),
121
122 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
123
124 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
125
126 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, 0),
127 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH),
128 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH),
129
130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW),
131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW),
132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW),
133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER),
135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER),
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW),
146 };
147
148 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
149
150 /**
151 * Take down the DRM device.
152 *
153 * \param dev DRM device structure.
154 *
155 * Frees every resource in \p dev.
156 *
157 * \sa drm_device
158 */
drm_lastclose(struct drm_device * dev)159 int drm_lastclose(struct drm_device * dev)
160 {
161 struct drm_vma_entry *vma, *vma_temp;
162 int i;
163
164 DRM_DEBUG("\n");
165
166 if (dev->driver->lastclose)
167 dev->driver->lastclose(dev);
168 DRM_DEBUG("driver lastclose completed\n");
169
170 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
171 drm_irq_uninstall(dev);
172
173 mutex_lock(&dev->struct_mutex);
174
175 /* Free drawable information memory */
176 drm_drawable_free_all(dev);
177 del_timer(&dev->timer);
178
179 /* Clear AGP information */
180 if (drm_core_has_AGP(dev) && dev->agp &&
181 !drm_core_check_feature(dev, DRIVER_MODESET)) {
182 struct drm_agp_mem *entry, *tempe;
183
184 /* Remove AGP resources, but leave dev->agp
185 intact until drv_cleanup is called. */
186 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
187 if (entry->bound)
188 drm_unbind_agp(entry->memory);
189 drm_free_agp(entry->memory, entry->pages);
190 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
191 }
192 INIT_LIST_HEAD(&dev->agp->memory);
193
194 if (dev->agp->acquired)
195 drm_agp_release(dev);
196
197 dev->agp->acquired = 0;
198 dev->agp->enabled = 0;
199 }
200 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg &&
201 !drm_core_check_feature(dev, DRIVER_MODESET)) {
202 drm_sg_cleanup(dev->sg);
203 dev->sg = NULL;
204 }
205
206 /* Clear vma list (only built for debugging) */
207 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
208 list_del(&vma->head);
209 drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
210 }
211
212 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
213 for (i = 0; i < dev->queue_count; i++) {
214 if (dev->queuelist[i]) {
215 drm_free(dev->queuelist[i],
216 sizeof(*dev->queuelist[0]),
217 DRM_MEM_QUEUES);
218 dev->queuelist[i] = NULL;
219 }
220 }
221 drm_free(dev->queuelist,
222 dev->queue_slots * sizeof(*dev->queuelist),
223 DRM_MEM_QUEUES);
224 dev->queuelist = NULL;
225 }
226 dev->queue_count = 0;
227
228 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
229 !drm_core_check_feature(dev, DRIVER_MODESET))
230 drm_dma_takedown(dev);
231
232 dev->dev_mapping = NULL;
233 mutex_unlock(&dev->struct_mutex);
234
235 DRM_DEBUG("lastclose completed\n");
236 return 0;
237 }
238
239 /**
240 * Module initialization. Called via init_module at module load time, or via
241 * linux/init/main.c (this is not currently supported).
242 *
243 * \return zero on success or a negative number on failure.
244 *
245 * Initializes an array of drm_device structures, and attempts to
246 * initialize all available devices, using consecutive minors, registering the
247 * stubs and initializing the AGP device.
248 *
249 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
250 * after the initialization for driver customization.
251 */
drm_init(struct drm_driver * driver)252 int drm_init(struct drm_driver *driver)
253 {
254 struct pci_dev *pdev = NULL;
255 struct pci_device_id *pid;
256 int i;
257
258 DRM_DEBUG("\n");
259
260 INIT_LIST_HEAD(&driver->device_list);
261
262 for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
263 pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
264
265 /* Loop around setting up a DRM device for each PCI device
266 * matching our ID and device class. If we had the internal
267 * function that pci_get_subsys and pci_get_class used, we'd
268 * be able to just pass pid in instead of doing a two-stage
269 * thing.
270 */
271 pdev = NULL;
272 while ((pdev =
273 pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
274 pid->subdevice, pdev)) != NULL) {
275 if ((pdev->class & pid->class_mask) != pid->class)
276 continue;
277
278 /* stealth mode requires a manual probe */
279 pci_dev_get(pdev);
280 drm_get_dev(pdev, pid, driver);
281 }
282 }
283 return 0;
284 }
285
286 EXPORT_SYMBOL(drm_init);
287
288 /**
289 * Called via cleanup_module() at module unload time.
290 *
291 * Cleans up all DRM device, calling drm_lastclose().
292 *
293 * \sa drm_init
294 */
drm_cleanup(struct drm_device * dev)295 static void drm_cleanup(struct drm_device * dev)
296 {
297 struct drm_map_list *r_list, *list_temp;
298 DRM_DEBUG("\n");
299
300 if (!dev) {
301 DRM_ERROR("cleanup called no dev\n");
302 return;
303 }
304
305 drm_vblank_cleanup(dev);
306
307 drm_lastclose(dev);
308
309 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
310 dev->agp && dev->agp->agp_mtrr >= 0) {
311 int retval;
312 retval = mtrr_del(dev->agp->agp_mtrr,
313 dev->agp->agp_info.aper_base,
314 dev->agp->agp_info.aper_size * 1024 * 1024);
315 DRM_DEBUG("mtrr_del=%d\n", retval);
316 }
317
318 if (dev->driver->unload)
319 dev->driver->unload(dev);
320
321 if (drm_core_has_AGP(dev) && dev->agp) {
322 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
323 dev->agp = NULL;
324 }
325
326 drm_ht_remove(&dev->map_hash);
327 drm_ctxbitmap_cleanup(dev);
328
329 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
330 drm_rmmap(dev, r_list->map);
331
332 if (drm_core_check_feature(dev, DRIVER_MODESET))
333 drm_put_minor(&dev->control);
334
335 if (dev->driver->driver_features & DRIVER_GEM)
336 drm_gem_destroy(dev);
337
338 drm_put_minor(&dev->primary);
339 if (drm_put_dev(dev))
340 DRM_ERROR("Cannot unload module\n");
341 }
342
drm_exit(struct drm_driver * driver)343 void drm_exit(struct drm_driver *driver)
344 {
345 struct drm_device *dev, *tmp;
346 DRM_DEBUG("\n");
347
348 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)
349 drm_cleanup(dev);
350
351 DRM_INFO("Module unloaded\n");
352 }
353
354 EXPORT_SYMBOL(drm_exit);
355
356 /** File operations structure */
357 static const struct file_operations drm_stub_fops = {
358 .owner = THIS_MODULE,
359 .open = drm_stub_open
360 };
361
drm_core_init(void)362 static int __init drm_core_init(void)
363 {
364 int ret = -ENOMEM;
365
366 idr_init(&drm_minors_idr);
367
368 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
369 goto err_p1;
370
371 drm_class = drm_sysfs_create(THIS_MODULE, "drm");
372 if (IS_ERR(drm_class)) {
373 printk(KERN_ERR "DRM: Error creating drm class.\n");
374 ret = PTR_ERR(drm_class);
375 goto err_p2;
376 }
377
378 drm_proc_root = proc_mkdir("dri", NULL);
379 if (!drm_proc_root) {
380 DRM_ERROR("Cannot create /proc/dri\n");
381 ret = -1;
382 goto err_p3;
383 }
384
385 drm_mem_init();
386
387 DRM_INFO("Initialized %s %d.%d.%d %s\n",
388 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
389 return 0;
390 err_p3:
391 drm_sysfs_destroy();
392 err_p2:
393 unregister_chrdev(DRM_MAJOR, "drm");
394
395 idr_destroy(&drm_minors_idr);
396 err_p1:
397 return ret;
398 }
399
drm_core_exit(void)400 static void __exit drm_core_exit(void)
401 {
402 remove_proc_entry("dri", NULL);
403 drm_sysfs_destroy();
404
405 unregister_chrdev(DRM_MAJOR, "drm");
406
407 idr_destroy(&drm_minors_idr);
408 }
409
410 module_init(drm_core_init);
411 module_exit(drm_core_exit);
412
413 /**
414 * Get version information
415 *
416 * \param inode device inode.
417 * \param filp file pointer.
418 * \param cmd command.
419 * \param arg user argument, pointing to a drm_version structure.
420 * \return zero on success or negative number on failure.
421 *
422 * Fills in the version information in \p arg.
423 */
drm_version(struct drm_device * dev,void * data,struct drm_file * file_priv)424 static int drm_version(struct drm_device *dev, void *data,
425 struct drm_file *file_priv)
426 {
427 struct drm_version *version = data;
428 int len;
429
430 version->version_major = dev->driver->major;
431 version->version_minor = dev->driver->minor;
432 version->version_patchlevel = dev->driver->patchlevel;
433 DRM_COPY(version->name, dev->driver->name);
434 DRM_COPY(version->date, dev->driver->date);
435 DRM_COPY(version->desc, dev->driver->desc);
436
437 return 0;
438 }
439
440 /**
441 * Called whenever a process performs an ioctl on /dev/drm.
442 *
443 * \param inode device inode.
444 * \param file_priv DRM file private.
445 * \param cmd command.
446 * \param arg user argument.
447 * \return zero on success or negative number on failure.
448 *
449 * Looks up the ioctl function in the ::ioctls table, checking for root
450 * previleges if so required, and dispatches to the respective function.
451 */
drm_ioctl(struct inode * inode,struct file * filp,unsigned int cmd,unsigned long arg)452 int drm_ioctl(struct inode *inode, struct file *filp,
453 unsigned int cmd, unsigned long arg)
454 {
455 struct drm_file *file_priv = filp->private_data;
456 struct drm_device *dev = file_priv->minor->dev;
457 struct drm_ioctl_desc *ioctl;
458 drm_ioctl_t *func;
459 unsigned int nr = DRM_IOCTL_NR(cmd);
460 int retcode = -EINVAL;
461 char *kdata = NULL;
462
463 atomic_inc(&dev->ioctl_count);
464 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
465 ++file_priv->ioctl_count;
466
467 DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
468 task_pid_nr(current), cmd, nr,
469 (long)old_encode_dev(file_priv->minor->device),
470 file_priv->authenticated);
471
472 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
473 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
474 goto err_i1;
475 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
476 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
477 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
478 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
479 ioctl = &drm_ioctls[nr];
480 cmd = ioctl->cmd;
481 } else
482 goto err_i1;
483
484 /* Do not trust userspace, use our own definition */
485 func = ioctl->func;
486 /* is there a local override? */
487 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
488 func = dev->driver->dma_ioctl;
489
490 if (!func) {
491 DRM_DEBUG("no function\n");
492 retcode = -EINVAL;
493 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
494 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
495 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master)) {
496 retcode = -EACCES;
497 } else {
498 if (cmd & (IOC_IN | IOC_OUT)) {
499 kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
500 if (!kdata) {
501 retcode = -ENOMEM;
502 goto err_i1;
503 }
504 }
505
506 if (cmd & IOC_IN) {
507 if (copy_from_user(kdata, (void __user *)arg,
508 _IOC_SIZE(cmd)) != 0) {
509 retcode = -EFAULT;
510 goto err_i1;
511 }
512 }
513 retcode = func(dev, kdata, file_priv);
514
515 if ((retcode == 0) && (cmd & IOC_OUT)) {
516 if (copy_to_user((void __user *)arg, kdata,
517 _IOC_SIZE(cmd)) != 0)
518 retcode = -EFAULT;
519 }
520 }
521
522 err_i1:
523 if (kdata)
524 kfree(kdata);
525 atomic_dec(&dev->ioctl_count);
526 if (retcode)
527 DRM_DEBUG("ret = %x\n", retcode);
528 return retcode;
529 }
530
531 EXPORT_SYMBOL(drm_ioctl);
532
drm_getsarea(struct drm_device * dev)533 drm_local_map_t *drm_getsarea(struct drm_device *dev)
534 {
535 struct drm_map_list *entry;
536
537 list_for_each_entry(entry, &dev->maplist, head) {
538 if (entry->map && entry->map->type == _DRM_SHM &&
539 (entry->map->flags & _DRM_CONTAINS_LOCK)) {
540 return entry->map;
541 }
542 }
543 return NULL;
544 }
545 EXPORT_SYMBOL(drm_getsarea);
546