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drm: add _DRM_CONSISTENT map type
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / drm / drm_drv.c
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 static int drm_version(struct inode *inode, struct file *filp,
55 unsigned int cmd, unsigned long arg);
56
57 /** Ioctl table */
58 static drm_ioctl_desc_t drm_ioctls[] = {
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;
231 case _DRM_CONSISTENT:
232 drm_pci_free(dev, map->size,
233 map->handle, map->offset);
234 break;
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 */
457 static int drm_version( struct inode *inode, struct file *filp,
458 unsigned int cmd, unsigned long arg )
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
kernel source for telekom puls (alcatel/mediatek)