Commit | Line | Data |
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1da177e4 LT |
1 | /** |
2 | * \file drm_drv.h | |
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 DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls ) | |
19 | * | |
20 | * #define drm_x mga_##x | |
21 | * \endcode | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
26 | * | |
27 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
28 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
29 | * All Rights Reserved. | |
30 | * | |
31 | * Permission is hereby granted, free of charge, to any person obtaining a | |
32 | * copy of this software and associated documentation files (the "Software"), | |
33 | * to deal in the Software without restriction, including without limitation | |
34 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
35 | * and/or sell copies of the Software, and to permit persons to whom the | |
36 | * Software is furnished to do so, subject to the following conditions: | |
37 | * | |
38 | * The above copyright notice and this permission notice (including the next | |
39 | * paragraph) shall be included in all copies or substantial portions of the | |
40 | * Software. | |
41 | * | |
42 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
43 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
44 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
45 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
46 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
47 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
48 | * OTHER DEALINGS IN THE SOFTWARE. | |
49 | */ | |
50 | ||
51 | #include "drmP.h" | |
52 | #include "drm_core.h" | |
53 | ||
c94f7029 DA |
54 | static int drm_version(struct inode *inode, struct file *filp, |
55 | unsigned int cmd, unsigned long arg); | |
56 | ||
1da177e4 | 57 | /** Ioctl table */ |
c94f7029 | 58 | static drm_ioctl_desc_t drm_ioctls[] = { |
1da177e4 LT |
59 | [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { drm_version, 0, 0 }, |
60 | [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 }, | |
61 | [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 }, | |
62 | [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_by_busid, 0, 1 }, | |
63 | [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { drm_getmap, 0, 0 }, | |
64 | [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { drm_getclient, 0, 0 }, | |
65 | [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { drm_getstats, 0, 0 }, | |
66 | [DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = { drm_setversion, 0, 1 }, | |
67 | ||
68 | [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 }, | |
69 | [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_noop, 1, 1 }, | |
70 | [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_noop, 1, 1 }, | |
71 | [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 }, | |
72 | ||
73 | [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 }, | |
74 | [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap, 1, 0 }, | |
75 | ||
76 | [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, 1, 1 }, | |
77 | [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, 1, 0 }, | |
78 | ||
79 | [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { drm_addctx, 1, 1 }, | |
80 | [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { drm_rmctx, 1, 1 }, | |
81 | [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { drm_modctx, 1, 1 }, | |
82 | [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { drm_getctx, 1, 0 }, | |
83 | [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx, 1, 1 }, | |
84 | [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { drm_newctx, 1, 1 }, | |
85 | [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { drm_resctx, 1, 0 }, | |
86 | ||
87 | [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 }, | |
88 | [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 }, | |
89 | ||
90 | [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { drm_lock, 1, 0 }, | |
91 | [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { drm_unlock, 1, 0 }, | |
92 | ||
93 | [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_noop, 1, 0 }, | |
94 | ||
95 | [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { drm_addbufs, 1, 1 }, | |
96 | [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { drm_markbufs, 1, 1 }, | |
97 | [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { drm_infobufs, 1, 0 }, | |
98 | [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { drm_mapbufs, 1, 0 }, | |
99 | [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { drm_freebufs, 1, 0 }, | |
100 | /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ | |
101 | ||
102 | [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { drm_control, 1, 1 }, | |
103 | ||
104 | #if __OS_HAS_AGP | |
105 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 }, | |
106 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 }, | |
107 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 }, | |
108 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 }, | |
109 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 }, | |
110 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 }, | |
111 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 }, | |
112 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 }, | |
113 | #endif | |
114 | ||
115 | [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { drm_sg_alloc, 1, 1 }, | |
116 | [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { drm_sg_free, 1, 1 }, | |
117 | ||
118 | [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { drm_wait_vblank, 0, 0 }, | |
119 | }; | |
120 | ||
121 | #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( drm_ioctls ) | |
122 | ||
123 | /** | |
124 | * Take down the DRM device. | |
125 | * | |
126 | * \param dev DRM device structure. | |
127 | * | |
128 | * Frees every resource in \p dev. | |
129 | * | |
130 | * \sa drm_device and setup(). | |
131 | */ | |
132 | int drm_takedown( drm_device_t *dev ) | |
133 | { | |
134 | drm_magic_entry_t *pt, *next; | |
135 | drm_map_t *map; | |
136 | drm_map_list_t *r_list; | |
137 | struct list_head *list, *list_next; | |
138 | drm_vma_entry_t *vma, *vma_next; | |
139 | int i; | |
140 | ||
141 | DRM_DEBUG( "\n" ); | |
142 | ||
143 | if (dev->driver->pretakedown) | |
144 | dev->driver->pretakedown(dev); | |
145 | ||
146 | if (dev->unique) { | |
147 | drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); | |
148 | dev->unique = NULL; | |
149 | dev->unique_len = 0; | |
150 | } | |
151 | ||
152 | if ( dev->irq_enabled ) drm_irq_uninstall( dev ); | |
153 | ||
154 | down( &dev->struct_sem ); | |
155 | del_timer( &dev->timer ); | |
156 | ||
157 | /* Clear pid list */ | |
158 | for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) { | |
159 | for ( pt = dev->magiclist[i].head ; pt ; pt = next ) { | |
160 | next = pt->next; | |
161 | drm_free( pt, sizeof(*pt), DRM_MEM_MAGIC ); | |
162 | } | |
163 | dev->magiclist[i].head = dev->magiclist[i].tail = NULL; | |
164 | } | |
165 | ||
166 | /* Clear AGP information */ | |
167 | if (drm_core_has_AGP(dev) && dev->agp) { | |
168 | drm_agp_mem_t *entry; | |
169 | drm_agp_mem_t *nexte; | |
170 | ||
171 | /* Remove AGP resources, but leave dev->agp | |
172 | intact until drv_cleanup is called. */ | |
173 | for ( entry = dev->agp->memory ; entry ; entry = nexte ) { | |
174 | nexte = entry->next; | |
175 | if ( entry->bound ) drm_unbind_agp( entry->memory ); | |
176 | drm_free_agp( entry->memory, entry->pages ); | |
177 | drm_free( entry, sizeof(*entry), DRM_MEM_AGPLISTS ); | |
178 | } | |
179 | dev->agp->memory = NULL; | |
180 | ||
181 | if ( dev->agp->acquired ) drm_agp_do_release(dev); | |
182 | ||
183 | dev->agp->acquired = 0; | |
184 | dev->agp->enabled = 0; | |
185 | } | |
186 | ||
187 | /* Clear vma list (only built for debugging) */ | |
188 | if ( dev->vmalist ) { | |
189 | for ( vma = dev->vmalist ; vma ; vma = vma_next ) { | |
190 | vma_next = vma->next; | |
191 | drm_free( vma, sizeof(*vma), DRM_MEM_VMAS ); | |
192 | } | |
193 | dev->vmalist = NULL; | |
194 | } | |
195 | ||
196 | if( dev->maplist ) { | |
197 | list_for_each_safe( list, list_next, &dev->maplist->head ) { | |
198 | r_list = (drm_map_list_t *)list; | |
199 | ||
200 | if ( ( map = r_list->map ) ) { | |
201 | switch ( map->type ) { | |
202 | case _DRM_REGISTERS: | |
203 | case _DRM_FRAME_BUFFER: | |
204 | if (drm_core_has_MTRR(dev)) { | |
205 | if ( map->mtrr >= 0 ) { | |
206 | int retcode; | |
207 | retcode = mtrr_del( map->mtrr, | |
208 | map->offset, | |
209 | map->size ); | |
210 | DRM_DEBUG( "mtrr_del=%d\n", retcode ); | |
211 | } | |
212 | } | |
213 | drm_ioremapfree( map->handle, map->size, dev ); | |
214 | break; | |
215 | case _DRM_SHM: | |
216 | vfree(map->handle); | |
217 | break; | |
218 | ||
219 | case _DRM_AGP: | |
220 | /* Do nothing here, because this is all | |
221 | * handled in the AGP/GART driver. | |
222 | */ | |
223 | break; | |
224 | case _DRM_SCATTER_GATHER: | |
225 | /* Handle it */ | |
226 | if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) { | |
227 | drm_sg_cleanup(dev->sg); | |
228 | dev->sg = NULL; | |
229 | } | |
230 | break; | |
2d0f9eaf DA |
231 | case _DRM_CONSISTENT: |
232 | drm_pci_free(dev, map->size, | |
233 | map->handle, map->offset); | |
234 | break; | |
1da177e4 LT |
235 | } |
236 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
237 | } | |
238 | list_del( list ); | |
239 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); | |
240 | } | |
241 | drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS); | |
242 | dev->maplist = NULL; | |
243 | } | |
244 | ||
245 | if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) { | |
246 | for ( i = 0 ; i < dev->queue_count ; i++ ) { | |
247 | if ( dev->queuelist[i] ) { | |
248 | drm_free( dev->queuelist[i], | |
249 | sizeof(*dev->queuelist[0]), | |
250 | DRM_MEM_QUEUES ); | |
251 | dev->queuelist[i] = NULL; | |
252 | } | |
253 | } | |
254 | drm_free( dev->queuelist, | |
255 | dev->queue_slots * sizeof(*dev->queuelist), | |
256 | DRM_MEM_QUEUES ); | |
257 | dev->queuelist = NULL; | |
258 | } | |
259 | dev->queue_count = 0; | |
260 | ||
261 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
262 | drm_dma_takedown( dev ); | |
263 | ||
264 | if ( dev->lock.hw_lock ) { | |
265 | dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */ | |
266 | dev->lock.filp = NULL; | |
267 | wake_up_interruptible( &dev->lock.lock_queue ); | |
268 | } | |
269 | up( &dev->struct_sem ); | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | ||
275 | ||
276 | /** | |
277 | * Module initialization. Called via init_module at module load time, or via | |
278 | * linux/init/main.c (this is not currently supported). | |
279 | * | |
280 | * \return zero on success or a negative number on failure. | |
281 | * | |
282 | * Initializes an array of drm_device structures, and attempts to | |
283 | * initialize all available devices, using consecutive minors, registering the | |
284 | * stubs and initializing the AGP device. | |
285 | * | |
286 | * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and | |
287 | * after the initialization for driver customization. | |
288 | */ | |
289 | int drm_init( struct drm_driver *driver ) | |
290 | { | |
291 | struct pci_dev *pdev = NULL; | |
292 | struct pci_device_id *pid; | |
293 | int i; | |
294 | ||
295 | DRM_DEBUG( "\n" ); | |
296 | ||
297 | drm_mem_init(); | |
298 | ||
299 | for (i=0; driver->pci_driver.id_table[i].vendor != 0; i++) { | |
300 | pid = (struct pci_device_id *)&driver->pci_driver.id_table[i]; | |
301 | ||
302 | pdev=NULL; | |
303 | /* pass back in pdev to account for multiple identical cards */ | |
304 | while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev)) != NULL) { | |
305 | /* stealth mode requires a manual probe */ | |
306 | pci_dev_get(pdev); | |
307 | drm_get_dev(pdev, pid, driver); | |
308 | } | |
309 | } | |
310 | return 0; | |
311 | } | |
312 | EXPORT_SYMBOL(drm_init); | |
313 | ||
314 | /** | |
315 | * Called via cleanup_module() at module unload time. | |
316 | * | |
317 | * Cleans up all DRM device, calling takedown(). | |
318 | * | |
319 | * \sa drm_init(). | |
320 | */ | |
321 | static void drm_cleanup( drm_device_t *dev ) | |
322 | { | |
323 | DRM_DEBUG( "\n" ); | |
324 | ||
325 | if (!dev) { | |
326 | DRM_ERROR("cleanup called no dev\n"); | |
327 | return; | |
328 | } | |
329 | ||
330 | drm_takedown( dev ); | |
331 | ||
332 | drm_ctxbitmap_cleanup( dev ); | |
333 | ||
334 | if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && | |
335 | dev->agp && dev->agp->agp_mtrr >= 0) { | |
336 | int retval; | |
337 | retval = mtrr_del( dev->agp->agp_mtrr, | |
338 | dev->agp->agp_info.aper_base, | |
339 | dev->agp->agp_info.aper_size*1024*1024 ); | |
340 | DRM_DEBUG( "mtrr_del=%d\n", retval ); | |
341 | } | |
342 | ||
343 | if (drm_core_has_AGP(dev) && dev->agp ) { | |
344 | drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS ); | |
345 | dev->agp = NULL; | |
346 | } | |
347 | ||
348 | if (dev->driver->postcleanup) | |
349 | dev->driver->postcleanup(dev); | |
350 | ||
351 | drm_put_head(&dev->primary); | |
352 | if ( drm_put_dev(dev) ) | |
353 | DRM_ERROR( "Cannot unload module\n" ); | |
354 | } | |
355 | ||
356 | void drm_exit (struct drm_driver *driver) | |
357 | { | |
358 | int i; | |
359 | drm_device_t *dev = NULL; | |
360 | drm_head_t *head; | |
361 | ||
362 | DRM_DEBUG( "\n" ); | |
363 | ||
364 | for (i = 0; i < drm_cards_limit; i++) { | |
365 | head = drm_heads[i]; | |
366 | if (!head) | |
367 | continue; | |
368 | if (!head->dev) | |
369 | continue; | |
370 | if (head->dev->driver!=driver) | |
371 | continue; | |
372 | dev=head->dev; | |
373 | } | |
374 | if (dev) { | |
375 | /* release the pci driver */ | |
376 | if (dev->pdev) | |
377 | pci_dev_put(dev->pdev); | |
378 | drm_cleanup(dev); | |
379 | } | |
380 | DRM_INFO( "Module unloaded\n" ); | |
381 | } | |
382 | EXPORT_SYMBOL(drm_exit); | |
383 | ||
384 | /** File operations structure */ | |
385 | static struct file_operations drm_stub_fops = { | |
386 | .owner = THIS_MODULE, | |
387 | .open = drm_stub_open | |
388 | }; | |
389 | ||
390 | static int __init drm_core_init(void) | |
391 | { | |
392 | int ret = -ENOMEM; | |
393 | ||
394 | drm_cards_limit = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1); | |
395 | drm_heads = drm_calloc(drm_cards_limit, | |
396 | sizeof(*drm_heads), DRM_MEM_STUB); | |
397 | if(!drm_heads) | |
398 | goto err_p1; | |
399 | ||
400 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
401 | goto err_p1; | |
402 | ||
403 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); | |
404 | if (IS_ERR(drm_class)) { | |
405 | printk (KERN_ERR "DRM: Error creating drm class.\n"); | |
406 | ret = PTR_ERR(drm_class); | |
407 | goto err_p2; | |
408 | } | |
409 | ||
410 | drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL); | |
411 | if (!drm_proc_root) { | |
412 | DRM_ERROR("Cannot create /proc/dri\n"); | |
413 | ret = -1; | |
414 | goto err_p3; | |
415 | } | |
416 | ||
417 | DRM_INFO( "Initialized %s %d.%d.%d %s\n", | |
418 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, | |
419 | CORE_DATE); | |
420 | return 0; | |
421 | err_p3: | |
422 | drm_sysfs_destroy(drm_class); | |
423 | err_p2: | |
424 | unregister_chrdev(DRM_MAJOR, "drm"); | |
425 | drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); | |
426 | err_p1: | |
427 | return ret; | |
428 | } | |
429 | ||
430 | static void __exit drm_core_exit (void) | |
431 | { | |
432 | remove_proc_entry("dri", NULL); | |
433 | drm_sysfs_destroy(drm_class); | |
434 | ||
435 | unregister_chrdev(DRM_MAJOR, "drm"); | |
436 | ||
437 | drm_free(drm_heads, sizeof(*drm_heads) * | |
438 | drm_cards_limit, DRM_MEM_STUB); | |
439 | } | |
440 | ||
441 | ||
442 | module_init( drm_core_init ); | |
443 | module_exit( drm_core_exit ); | |
444 | ||
445 | ||
446 | /** | |
447 | * Get version information | |
448 | * | |
449 | * \param inode device inode. | |
450 | * \param filp file pointer. | |
451 | * \param cmd command. | |
452 | * \param arg user argument, pointing to a drm_version structure. | |
453 | * \return zero on success or negative number on failure. | |
454 | * | |
455 | * Fills in the version information in \p arg. | |
456 | */ | |
c94f7029 DA |
457 | static int drm_version( struct inode *inode, struct file *filp, |
458 | unsigned int cmd, unsigned long arg ) | |
1da177e4 LT |
459 | { |
460 | drm_file_t *priv = filp->private_data; | |
461 | drm_device_t *dev = priv->head->dev; | |
462 | drm_version_t __user *argp = (void __user *)arg; | |
463 | drm_version_t version; | |
464 | int ret; | |
465 | ||
466 | if ( copy_from_user( &version, argp, sizeof(version) ) ) | |
467 | return -EFAULT; | |
468 | ||
469 | /* version is a required function to return the personality module version */ | |
470 | if ((ret = dev->driver->version(&version))) | |
471 | return ret; | |
472 | ||
473 | if ( copy_to_user( argp, &version, sizeof(version) ) ) | |
474 | return -EFAULT; | |
475 | return 0; | |
476 | } | |
477 | ||
478 | ||
479 | ||
480 | /** | |
481 | * Called whenever a process performs an ioctl on /dev/drm. | |
482 | * | |
483 | * \param inode device inode. | |
484 | * \param filp file pointer. | |
485 | * \param cmd command. | |
486 | * \param arg user argument. | |
487 | * \return zero on success or negative number on failure. | |
488 | * | |
489 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
490 | * previleges if so required, and dispatches to the respective function. | |
491 | */ | |
492 | int drm_ioctl( struct inode *inode, struct file *filp, | |
493 | unsigned int cmd, unsigned long arg ) | |
494 | { | |
495 | drm_file_t *priv = filp->private_data; | |
496 | drm_device_t *dev = priv->head->dev; | |
497 | drm_ioctl_desc_t *ioctl; | |
498 | drm_ioctl_t *func; | |
499 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
500 | int retcode = -EINVAL; | |
501 | ||
502 | atomic_inc( &dev->ioctl_count ); | |
503 | atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] ); | |
504 | ++priv->ioctl_count; | |
505 | ||
506 | DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", | |
507 | current->pid, cmd, nr, (long)old_encode_dev(priv->head->device), | |
508 | priv->authenticated ); | |
509 | ||
510 | if (nr < DRIVER_IOCTL_COUNT) | |
511 | ioctl = &drm_ioctls[nr]; | |
512 | else if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) | |
513 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; | |
514 | else | |
515 | goto err_i1; | |
516 | ||
517 | func = ioctl->func; | |
518 | /* is there a local override? */ | |
519 | if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) | |
520 | func = dev->driver->dma_ioctl; | |
521 | ||
522 | if ( !func ) { | |
523 | DRM_DEBUG( "no function\n" ); | |
524 | retcode = -EINVAL; | |
525 | } else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )|| | |
526 | ( ioctl->auth_needed && !priv->authenticated ) ) { | |
527 | retcode = -EACCES; | |
528 | } else { | |
529 | retcode = func( inode, filp, cmd, arg ); | |
530 | } | |
531 | ||
532 | err_i1: | |
533 | atomic_dec( &dev->ioctl_count ); | |
534 | if (retcode) DRM_DEBUG( "ret = %x\n", retcode); | |
535 | return retcode; | |
536 | } | |
537 | EXPORT_SYMBOL(drm_ioctl); | |
538 |