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[PATCH] aic7xxx_osm build fix
[cris-mirror.git] / drivers / char / drm / drm_drv.c
blob1e37ed0c6b8d7c6b34f469dde8d0ca86bfa528b6
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
54 /** Ioctl table */
55 drm_ioctl_desc_t drm_ioctls[] = {
56 [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { drm_version, 0, 0 },
57 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 },
58 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 },
59 [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_by_busid, 0, 1 },
60 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { drm_getmap, 0, 0 },
61 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { drm_getclient, 0, 0 },
62 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { drm_getstats, 0, 0 },
63 [DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = { drm_setversion, 0, 1 },
64
65 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 },
66 [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_noop, 1, 1 },
67 [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_noop, 1, 1 },
68 [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 },
69
70 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
71 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap, 1, 0 },
72
73 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, 1, 1 },
74 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, 1, 0 },
75
76 [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { drm_addctx, 1, 1 },
77 [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { drm_rmctx, 1, 1 },
78 [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { drm_modctx, 1, 1 },
79 [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { drm_getctx, 1, 0 },
80 [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx, 1, 1 },
81 [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { drm_newctx, 1, 1 },
82 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { drm_resctx, 1, 0 },
83
84 [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
85 [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
86
87 [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { drm_lock, 1, 0 },
88 [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { drm_unlock, 1, 0 },
89
90 [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_noop, 1, 0 },
91
92 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { drm_addbufs, 1, 1 },
93 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { drm_markbufs, 1, 1 },
94 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { drm_infobufs, 1, 0 },
95 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { drm_mapbufs, 1, 0 },
96 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { drm_freebufs, 1, 0 },
97 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
98
99 [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { drm_control, 1, 1 },
100
101 #if __OS_HAS_AGP
102 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 },
103 [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 },
104 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 },
105 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 },
106 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 },
107 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 },
108 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 },
109 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 },
110 #endif
111
112 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { drm_sg_alloc, 1, 1 },
113 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { drm_sg_free, 1, 1 },
114
115 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { drm_wait_vblank, 0, 0 },
116 };
117
118 #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( drm_ioctls )
119
120 /**
121 * Take down the DRM device.
122 *
123 * \param dev DRM device structure.
124 *
125 * Frees every resource in \p dev.
126 *
127 * \sa drm_device and setup().
128 */
129 int drm_takedown( drm_device_t *dev )
130 {
131 drm_magic_entry_t *pt, *next;
132 drm_map_t *map;
133 drm_map_list_t *r_list;
134 struct list_head *list, *list_next;
135 drm_vma_entry_t *vma, *vma_next;
136 int i;
137
138 DRM_DEBUG( "\n" );
139
140 if (dev->driver->pretakedown)
141 dev->driver->pretakedown(dev);
142
143 if (dev->unique) {
144 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
145 dev->unique = NULL;
146 dev->unique_len = 0;
147 }
148
149 if ( dev->irq_enabled ) drm_irq_uninstall( dev );
150
151 down( &dev->struct_sem );
152 del_timer( &dev->timer );
153
154 /* Clear pid list */
155 for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
156 for ( pt = dev->magiclist[i].head ; pt ; pt = next ) {
157 next = pt->next;
158 drm_free( pt, sizeof(*pt), DRM_MEM_MAGIC );
159 }
160 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
161 }
162
163 /* Clear AGP information */
164 if (drm_core_has_AGP(dev) && dev->agp) {
165 drm_agp_mem_t *entry;
166 drm_agp_mem_t *nexte;
167
168 /* Remove AGP resources, but leave dev->agp
169 intact until drv_cleanup is called. */
170 for ( entry = dev->agp->memory ; entry ; entry = nexte ) {
171 nexte = entry->next;
172 if ( entry->bound ) drm_unbind_agp( entry->memory );
173 drm_free_agp( entry->memory, entry->pages );
174 drm_free( entry, sizeof(*entry), DRM_MEM_AGPLISTS );
175 }
176 dev->agp->memory = NULL;
177
178 if ( dev->agp->acquired ) drm_agp_do_release(dev);
179
180 dev->agp->acquired = 0;
181 dev->agp->enabled = 0;
182 }
183
184 /* Clear vma list (only built for debugging) */
185 if ( dev->vmalist ) {
186 for ( vma = dev->vmalist ; vma ; vma = vma_next ) {
187 vma_next = vma->next;
188 drm_free( vma, sizeof(*vma), DRM_MEM_VMAS );
189 }
190 dev->vmalist = NULL;
191 }
192
193 if( dev->maplist ) {
194 list_for_each_safe( list, list_next, &dev->maplist->head ) {
195 r_list = (drm_map_list_t *)list;
196
197 if ( ( map = r_list->map ) ) {
198 switch ( map->type ) {
199 case _DRM_REGISTERS:
200 case _DRM_FRAME_BUFFER:
201 if (drm_core_has_MTRR(dev)) {
202 if ( map->mtrr >= 0 ) {
203 int retcode;
204 retcode = mtrr_del( map->mtrr,
205 map->offset,
206 map->size );
207 DRM_DEBUG( "mtrr_del=%d\n", retcode );
208 }
209 }
210 drm_ioremapfree( map->handle, map->size, dev );
211 break;
212 case _DRM_SHM:
213 vfree(map->handle);
214 break;
215
216 case _DRM_AGP:
217 /* Do nothing here, because this is all
218 * handled in the AGP/GART driver.
219 */
220 break;
221 case _DRM_SCATTER_GATHER:
222 /* Handle it */
223 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
224 drm_sg_cleanup(dev->sg);
225 dev->sg = NULL;
226 }
227 break;
228 }
229 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
230 }
231 list_del( list );
232 drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
233 }
234 drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
235 dev->maplist = NULL;
236 }
237
238 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) {
239 for ( i = 0 ; i < dev->queue_count ; i++ ) {
240 if ( dev->queuelist[i] ) {
241 drm_free( dev->queuelist[i],
242 sizeof(*dev->queuelist[0]),
243 DRM_MEM_QUEUES );
244 dev->queuelist[i] = NULL;
245 }
246 }
247 drm_free( dev->queuelist,
248 dev->queue_slots * sizeof(*dev->queuelist),
249 DRM_MEM_QUEUES );
250 dev->queuelist = NULL;
251 }
252 dev->queue_count = 0;
253
254 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
255 drm_dma_takedown( dev );
256
257 if ( dev->lock.hw_lock ) {
258 dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
259 dev->lock.filp = NULL;
260 wake_up_interruptible( &dev->lock.lock_queue );
261 }
262 up( &dev->struct_sem );
263
264 return 0;
265 }
266
267
268
269 /**
270 * Module initialization. Called via init_module at module load time, or via
271 * linux/init/main.c (this is not currently supported).
272 *
273 * \return zero on success or a negative number on failure.
274 *
275 * Initializes an array of drm_device structures, and attempts to
276 * initialize all available devices, using consecutive minors, registering the
277 * stubs and initializing the AGP device.
278 *
279 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
280 * after the initialization for driver customization.
281 */
282 int drm_init( struct drm_driver *driver )
283 {
284 struct pci_dev *pdev = NULL;
285 struct pci_device_id *pid;
286 int i;
287
288 DRM_DEBUG( "\n" );
289
290 drm_mem_init();
291
292 for (i=0; driver->pci_driver.id_table[i].vendor != 0; i++) {
293 pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
294
295 pdev=NULL;
296 /* pass back in pdev to account for multiple identical cards */
297 while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev)) != NULL) {
298 /* stealth mode requires a manual probe */
299 pci_dev_get(pdev);
300 drm_get_dev(pdev, pid, driver);
301 }
302 }
303 return 0;
304 }
305 EXPORT_SYMBOL(drm_init);
306
307 /**
308 * Called via cleanup_module() at module unload time.
309 *
310 * Cleans up all DRM device, calling takedown().
311 *
312 * \sa drm_init().
313 */
314 static void drm_cleanup( drm_device_t *dev )
315 {
316 DRM_DEBUG( "\n" );
317
318 if (!dev) {
319 DRM_ERROR("cleanup called no dev\n");
320 return;
321 }
322
323 drm_takedown( dev );
324
325 drm_ctxbitmap_cleanup( dev );
326
327 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
328 dev->agp && dev->agp->agp_mtrr >= 0) {
329 int retval;
330 retval = mtrr_del( dev->agp->agp_mtrr,
331 dev->agp->agp_info.aper_base,
332 dev->agp->agp_info.aper_size*1024*1024 );
333 DRM_DEBUG( "mtrr_del=%d\n", retval );
334 }
335
336 if (drm_core_has_AGP(dev) && dev->agp ) {
337 drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS );
338 dev->agp = NULL;
339 }
340
341 if (dev->driver->postcleanup)
342 dev->driver->postcleanup(dev);
343
344 drm_put_head(&dev->primary);
345 if ( drm_put_dev(dev) )
346 DRM_ERROR( "Cannot unload module\n" );
347 }
348
349 void drm_exit (struct drm_driver *driver)
350 {
351 int i;
352 drm_device_t *dev = NULL;
353 drm_head_t *head;
354
355 DRM_DEBUG( "\n" );
356
357 for (i = 0; i < drm_cards_limit; i++) {
358 head = drm_heads[i];
359 if (!head)
360 continue;
361 if (!head->dev)
362 continue;
363 if (head->dev->driver!=driver)
364 continue;
365 dev=head->dev;
366 }
367 if (dev) {
368 /* release the pci driver */
369 if (dev->pdev)
370 pci_dev_put(dev->pdev);
371 drm_cleanup(dev);
372 }
373 DRM_INFO( "Module unloaded\n" );
374 }
375 EXPORT_SYMBOL(drm_exit);
376
377 /** File operations structure */
378 static struct file_operations drm_stub_fops = {
379 .owner = THIS_MODULE,
380 .open = drm_stub_open
381 };
382
383 static int __init drm_core_init(void)
384 {
385 int ret = -ENOMEM;
386
387 drm_cards_limit = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
388 drm_heads = drm_calloc(drm_cards_limit,
389 sizeof(*drm_heads), DRM_MEM_STUB);
390 if(!drm_heads)
391 goto err_p1;
392
393 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
394 goto err_p1;
395
396 drm_class = drm_sysfs_create(THIS_MODULE, "drm");
397 if (IS_ERR(drm_class)) {
398 printk (KERN_ERR "DRM: Error creating drm class.\n");
399 ret = PTR_ERR(drm_class);
400 goto err_p2;
401 }
402
403 drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL);
404 if (!drm_proc_root) {
405 DRM_ERROR("Cannot create /proc/dri\n");
406 ret = -1;
407 goto err_p3;
408 }
409
410 DRM_INFO( "Initialized %s %d.%d.%d %s\n",
411 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL,
412 CORE_DATE);
413 return 0;
414 err_p3:
415 drm_sysfs_destroy(drm_class);
416 err_p2:
417 unregister_chrdev(DRM_MAJOR, "drm");
418 drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
419 err_p1:
420 return ret;
421 }
422
423 static void __exit drm_core_exit (void)
424 {
425 remove_proc_entry("dri", NULL);
426 drm_sysfs_destroy(drm_class);
427
428 unregister_chrdev(DRM_MAJOR, "drm");
429
430 drm_free(drm_heads, sizeof(*drm_heads) *
431 drm_cards_limit, DRM_MEM_STUB);
432 }
433
434
435 module_init( drm_core_init );
436 module_exit( drm_core_exit );
437
438
439 /**
440 * Get version information
441 *
442 * \param inode device inode.
443 * \param filp file pointer.
444 * \param cmd command.
445 * \param arg user argument, pointing to a drm_version structure.
446 * \return zero on success or negative number on failure.
447 *
448 * Fills in the version information in \p arg.
449 */
450 int drm_version( struct inode *inode, struct file *filp,
451 unsigned int cmd, unsigned long arg )
452 {
453 drm_file_t *priv = filp->private_data;
454 drm_device_t *dev = priv->head->dev;
455 drm_version_t __user *argp = (void __user *)arg;
456 drm_version_t version;
457 int ret;
458
459 if ( copy_from_user( &version, argp, sizeof(version) ) )
460 return -EFAULT;
461
462 /* version is a required function to return the personality module version */
463 if ((ret = dev->driver->version(&version)))
464 return ret;
465
466 if ( copy_to_user( argp, &version, sizeof(version) ) )
467 return -EFAULT;
468 return 0;
469 }
470
471
472
473 /**
474 * Called whenever a process performs an ioctl on /dev/drm.
475 *
476 * \param inode device inode.
477 * \param filp file pointer.
478 * \param cmd command.
479 * \param arg user argument.
480 * \return zero on success or negative number on failure.
481 *
482 * Looks up the ioctl function in the ::ioctls table, checking for root
483 * previleges if so required, and dispatches to the respective function.
484 */
485 int drm_ioctl( struct inode *inode, struct file *filp,
486 unsigned int cmd, unsigned long arg )
487 {
488 drm_file_t *priv = filp->private_data;
489 drm_device_t *dev = priv->head->dev;
490 drm_ioctl_desc_t *ioctl;
491 drm_ioctl_t *func;
492 unsigned int nr = DRM_IOCTL_NR(cmd);
493 int retcode = -EINVAL;
494
495 atomic_inc( &dev->ioctl_count );
496 atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] );
497 ++priv->ioctl_count;
498
499 DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
500 current->pid, cmd, nr, (long)old_encode_dev(priv->head->device),
501 priv->authenticated );
502
503 if (nr < DRIVER_IOCTL_COUNT)
504 ioctl = &drm_ioctls[nr];
505 else if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
506 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
507 else
508 goto err_i1;
509
510 func = ioctl->func;
511 /* is there a local override? */
512 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
513 func = dev->driver->dma_ioctl;
514
515 if ( !func ) {
516 DRM_DEBUG( "no function\n" );
517 retcode = -EINVAL;
518 } else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )||
519 ( ioctl->auth_needed && !priv->authenticated ) ) {
520 retcode = -EACCES;
521 } else {
522 retcode = func( inode, filp, cmd, arg );
523 }
524
525 err_i1:
526 atomic_dec( &dev->ioctl_count );
527 if (retcode) DRM_DEBUG( "ret = %x\n", retcode);
528 return retcode;
529 }
530 EXPORT_SYMBOL(drm_ioctl);
531
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