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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 | ||
7ab98401 DA |
73 | [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap_ioctl,1, 1 }, |
74 | [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap_ioctl, 1, 0 }, | |
1da177e4 LT |
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 | |
7ab98401 DA |
105 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire_ioctl, 1, 1 }, |
106 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release_ioctl, 1, 1 }, | |
107 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable_ioctl, 1, 1 }, | |
108 | [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info_ioctl, 1, 0 }, | |
1da177e4 LT |
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 | ||
7ab98401 DA |
181 | if (dev->agp->acquired) |
182 | drm_agp_release(dev); | |
1da177e4 LT |
183 | |
184 | dev->agp->acquired = 0; | |
185 | dev->agp->enabled = 0; | |
186 | } | |
187 | ||
188 | /* Clear vma list (only built for debugging) */ | |
189 | if ( dev->vmalist ) { | |
190 | for ( vma = dev->vmalist ; vma ; vma = vma_next ) { | |
191 | vma_next = vma->next; | |
192 | drm_free( vma, sizeof(*vma), DRM_MEM_VMAS ); | |
193 | } | |
194 | dev->vmalist = NULL; | |
195 | } | |
196 | ||
197 | if( dev->maplist ) { | |
198 | list_for_each_safe( list, list_next, &dev->maplist->head ) { | |
199 | r_list = (drm_map_list_t *)list; | |
200 | ||
201 | if ( ( map = r_list->map ) ) { | |
9c8da5eb DA |
202 | drm_dma_handle_t dmah; |
203 | ||
1da177e4 LT |
204 | switch ( map->type ) { |
205 | case _DRM_REGISTERS: | |
206 | case _DRM_FRAME_BUFFER: | |
207 | if (drm_core_has_MTRR(dev)) { | |
208 | if ( map->mtrr >= 0 ) { | |
209 | int retcode; | |
210 | retcode = mtrr_del( map->mtrr, | |
211 | map->offset, | |
212 | map->size ); | |
213 | DRM_DEBUG( "mtrr_del=%d\n", retcode ); | |
214 | } | |
215 | } | |
216 | drm_ioremapfree( map->handle, map->size, dev ); | |
217 | break; | |
218 | case _DRM_SHM: | |
219 | vfree(map->handle); | |
220 | break; | |
221 | ||
222 | case _DRM_AGP: | |
223 | /* Do nothing here, because this is all | |
224 | * handled in the AGP/GART driver. | |
225 | */ | |
226 | break; | |
227 | case _DRM_SCATTER_GATHER: | |
228 | /* Handle it */ | |
229 | if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) { | |
230 | drm_sg_cleanup(dev->sg); | |
231 | dev->sg = NULL; | |
232 | } | |
233 | break; | |
2d0f9eaf | 234 | case _DRM_CONSISTENT: |
9c8da5eb DA |
235 | dmah.vaddr = map->handle; |
236 | dmah.busaddr = map->offset; | |
237 | dmah.size = map->size; | |
238 | __drm_pci_free(dev, &dmah); | |
2d0f9eaf | 239 | break; |
1da177e4 LT |
240 | } |
241 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
242 | } | |
243 | list_del( list ); | |
244 | drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS); | |
245 | } | |
246 | drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS); | |
247 | dev->maplist = NULL; | |
248 | } | |
249 | ||
250 | if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) { | |
251 | for ( i = 0 ; i < dev->queue_count ; i++ ) { | |
252 | if ( dev->queuelist[i] ) { | |
253 | drm_free( dev->queuelist[i], | |
254 | sizeof(*dev->queuelist[0]), | |
255 | DRM_MEM_QUEUES ); | |
256 | dev->queuelist[i] = NULL; | |
257 | } | |
258 | } | |
259 | drm_free( dev->queuelist, | |
260 | dev->queue_slots * sizeof(*dev->queuelist), | |
261 | DRM_MEM_QUEUES ); | |
262 | dev->queuelist = NULL; | |
263 | } | |
264 | dev->queue_count = 0; | |
265 | ||
266 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
267 | drm_dma_takedown( dev ); | |
268 | ||
269 | if ( dev->lock.hw_lock ) { | |
270 | dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */ | |
271 | dev->lock.filp = NULL; | |
272 | wake_up_interruptible( &dev->lock.lock_queue ); | |
273 | } | |
274 | up( &dev->struct_sem ); | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | ||
280 | ||
281 | /** | |
282 | * Module initialization. Called via init_module at module load time, or via | |
283 | * linux/init/main.c (this is not currently supported). | |
284 | * | |
285 | * \return zero on success or a negative number on failure. | |
286 | * | |
287 | * Initializes an array of drm_device structures, and attempts to | |
288 | * initialize all available devices, using consecutive minors, registering the | |
289 | * stubs and initializing the AGP device. | |
290 | * | |
291 | * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and | |
292 | * after the initialization for driver customization. | |
293 | */ | |
294 | int drm_init( struct drm_driver *driver ) | |
295 | { | |
296 | struct pci_dev *pdev = NULL; | |
297 | struct pci_device_id *pid; | |
298 | int i; | |
299 | ||
300 | DRM_DEBUG( "\n" ); | |
301 | ||
302 | drm_mem_init(); | |
303 | ||
304 | for (i=0; driver->pci_driver.id_table[i].vendor != 0; i++) { | |
305 | pid = (struct pci_device_id *)&driver->pci_driver.id_table[i]; | |
306 | ||
307 | pdev=NULL; | |
308 | /* pass back in pdev to account for multiple identical cards */ | |
309 | while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev)) != NULL) { | |
310 | /* stealth mode requires a manual probe */ | |
311 | pci_dev_get(pdev); | |
312 | drm_get_dev(pdev, pid, driver); | |
313 | } | |
314 | } | |
315 | return 0; | |
316 | } | |
317 | EXPORT_SYMBOL(drm_init); | |
318 | ||
319 | /** | |
320 | * Called via cleanup_module() at module unload time. | |
321 | * | |
322 | * Cleans up all DRM device, calling takedown(). | |
323 | * | |
324 | * \sa drm_init(). | |
325 | */ | |
326 | static void drm_cleanup( drm_device_t *dev ) | |
327 | { | |
328 | DRM_DEBUG( "\n" ); | |
329 | ||
330 | if (!dev) { | |
331 | DRM_ERROR("cleanup called no dev\n"); | |
332 | return; | |
333 | } | |
334 | ||
335 | drm_takedown( dev ); | |
336 | ||
337 | drm_ctxbitmap_cleanup( dev ); | |
338 | ||
339 | if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && | |
340 | dev->agp && dev->agp->agp_mtrr >= 0) { | |
341 | int retval; | |
342 | retval = mtrr_del( dev->agp->agp_mtrr, | |
343 | dev->agp->agp_info.aper_base, | |
344 | dev->agp->agp_info.aper_size*1024*1024 ); | |
345 | DRM_DEBUG( "mtrr_del=%d\n", retval ); | |
346 | } | |
347 | ||
348 | if (drm_core_has_AGP(dev) && dev->agp ) { | |
349 | drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS ); | |
350 | dev->agp = NULL; | |
351 | } | |
352 | ||
353 | if (dev->driver->postcleanup) | |
354 | dev->driver->postcleanup(dev); | |
355 | ||
356 | drm_put_head(&dev->primary); | |
357 | if ( drm_put_dev(dev) ) | |
358 | DRM_ERROR( "Cannot unload module\n" ); | |
359 | } | |
360 | ||
361 | void drm_exit (struct drm_driver *driver) | |
362 | { | |
363 | int i; | |
364 | drm_device_t *dev = NULL; | |
365 | drm_head_t *head; | |
366 | ||
367 | DRM_DEBUG( "\n" ); | |
368 | ||
369 | for (i = 0; i < drm_cards_limit; i++) { | |
370 | head = drm_heads[i]; | |
371 | if (!head) | |
372 | continue; | |
373 | if (!head->dev) | |
374 | continue; | |
375 | if (head->dev->driver!=driver) | |
376 | continue; | |
377 | dev=head->dev; | |
378 | } | |
379 | if (dev) { | |
380 | /* release the pci driver */ | |
381 | if (dev->pdev) | |
382 | pci_dev_put(dev->pdev); | |
383 | drm_cleanup(dev); | |
384 | } | |
385 | DRM_INFO( "Module unloaded\n" ); | |
386 | } | |
387 | EXPORT_SYMBOL(drm_exit); | |
388 | ||
389 | /** File operations structure */ | |
390 | static struct file_operations drm_stub_fops = { | |
391 | .owner = THIS_MODULE, | |
392 | .open = drm_stub_open | |
393 | }; | |
394 | ||
395 | static int __init drm_core_init(void) | |
396 | { | |
397 | int ret = -ENOMEM; | |
398 | ||
399 | drm_cards_limit = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1); | |
400 | drm_heads = drm_calloc(drm_cards_limit, | |
401 | sizeof(*drm_heads), DRM_MEM_STUB); | |
402 | if(!drm_heads) | |
403 | goto err_p1; | |
404 | ||
405 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) | |
406 | goto err_p1; | |
407 | ||
408 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); | |
409 | if (IS_ERR(drm_class)) { | |
410 | printk (KERN_ERR "DRM: Error creating drm class.\n"); | |
411 | ret = PTR_ERR(drm_class); | |
412 | goto err_p2; | |
413 | } | |
414 | ||
415 | drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL); | |
416 | if (!drm_proc_root) { | |
417 | DRM_ERROR("Cannot create /proc/dri\n"); | |
418 | ret = -1; | |
419 | goto err_p3; | |
420 | } | |
421 | ||
422 | DRM_INFO( "Initialized %s %d.%d.%d %s\n", | |
423 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, | |
424 | CORE_DATE); | |
425 | return 0; | |
426 | err_p3: | |
427 | drm_sysfs_destroy(drm_class); | |
428 | err_p2: | |
429 | unregister_chrdev(DRM_MAJOR, "drm"); | |
430 | drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); | |
431 | err_p1: | |
432 | return ret; | |
433 | } | |
434 | ||
435 | static void __exit drm_core_exit (void) | |
436 | { | |
437 | remove_proc_entry("dri", NULL); | |
438 | drm_sysfs_destroy(drm_class); | |
439 | ||
440 | unregister_chrdev(DRM_MAJOR, "drm"); | |
441 | ||
442 | drm_free(drm_heads, sizeof(*drm_heads) * | |
443 | drm_cards_limit, DRM_MEM_STUB); | |
444 | } | |
445 | ||
446 | ||
447 | module_init( drm_core_init ); | |
448 | module_exit( drm_core_exit ); | |
449 | ||
450 | ||
451 | /** | |
452 | * Get version information | |
453 | * | |
454 | * \param inode device inode. | |
455 | * \param filp file pointer. | |
456 | * \param cmd command. | |
457 | * \param arg user argument, pointing to a drm_version structure. | |
458 | * \return zero on success or negative number on failure. | |
459 | * | |
460 | * Fills in the version information in \p arg. | |
461 | */ | |
c94f7029 DA |
462 | static int drm_version( struct inode *inode, struct file *filp, |
463 | unsigned int cmd, unsigned long arg ) | |
1da177e4 LT |
464 | { |
465 | drm_file_t *priv = filp->private_data; | |
466 | drm_device_t *dev = priv->head->dev; | |
467 | drm_version_t __user *argp = (void __user *)arg; | |
468 | drm_version_t version; | |
469 | int ret; | |
470 | ||
471 | if ( copy_from_user( &version, argp, sizeof(version) ) ) | |
472 | return -EFAULT; | |
473 | ||
474 | /* version is a required function to return the personality module version */ | |
475 | if ((ret = dev->driver->version(&version))) | |
476 | return ret; | |
477 | ||
478 | if ( copy_to_user( argp, &version, sizeof(version) ) ) | |
479 | return -EFAULT; | |
480 | return 0; | |
481 | } | |
482 | ||
483 | ||
484 | ||
485 | /** | |
486 | * Called whenever a process performs an ioctl on /dev/drm. | |
487 | * | |
488 | * \param inode device inode. | |
489 | * \param filp file pointer. | |
490 | * \param cmd command. | |
491 | * \param arg user argument. | |
492 | * \return zero on success or negative number on failure. | |
493 | * | |
494 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
495 | * previleges if so required, and dispatches to the respective function. | |
496 | */ | |
497 | int drm_ioctl( struct inode *inode, struct file *filp, | |
498 | unsigned int cmd, unsigned long arg ) | |
499 | { | |
500 | drm_file_t *priv = filp->private_data; | |
501 | drm_device_t *dev = priv->head->dev; | |
502 | drm_ioctl_desc_t *ioctl; | |
503 | drm_ioctl_t *func; | |
504 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
505 | int retcode = -EINVAL; | |
506 | ||
507 | atomic_inc( &dev->ioctl_count ); | |
508 | atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] ); | |
509 | ++priv->ioctl_count; | |
510 | ||
511 | DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", | |
512 | current->pid, cmd, nr, (long)old_encode_dev(priv->head->device), | |
513 | priv->authenticated ); | |
514 | ||
515 | if (nr < DRIVER_IOCTL_COUNT) | |
516 | ioctl = &drm_ioctls[nr]; | |
517 | else if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) | |
518 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; | |
519 | else | |
520 | goto err_i1; | |
521 | ||
522 | func = ioctl->func; | |
523 | /* is there a local override? */ | |
524 | if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) | |
525 | func = dev->driver->dma_ioctl; | |
526 | ||
527 | if ( !func ) { | |
528 | DRM_DEBUG( "no function\n" ); | |
529 | retcode = -EINVAL; | |
530 | } else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )|| | |
531 | ( ioctl->auth_needed && !priv->authenticated ) ) { | |
532 | retcode = -EACCES; | |
533 | } else { | |
534 | retcode = func( inode, filp, cmd, arg ); | |
535 | } | |
536 | ||
537 | err_i1: | |
538 | atomic_dec( &dev->ioctl_count ); | |
539 | if (retcode) DRM_DEBUG( "ret = %x\n", retcode); | |
540 | return retcode; | |
541 | } | |
542 | EXPORT_SYMBOL(drm_ioctl); | |
543 |