3 * Generic driver template
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
8 * To use this template, you must at least define the following (samples
9 * given for the MGA driver):
12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc."
14 * #define DRIVER_NAME "mga"
15 * #define DRIVER_DESC "Matrox G200/G400"
16 * #define DRIVER_DATE "20001127"
18 * #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls )
20 * #define drm_x mga_##x
25 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
27 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
28 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
29 * All Rights Reserved.
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:
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
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.
54 static int drm_version(struct inode *inode, struct file *filp,
55 unsigned int cmd, unsigned long arg);
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 },
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 },
73 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
74 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap, 1, 0 },
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 },
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 },
87 [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
88 [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
90 [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { drm_lock, 1, 0 },
91 [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { drm_unlock, 1, 0 },
93 [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_noop, 1, 0 },
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. */
102 [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { drm_control, 1, 1 },
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 },
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 },
118 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { drm_wait_vblank, 0, 0 },
121 #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( drm_ioctls )
124 * Take down the DRM device.
126 * \param dev DRM device structure.
128 * Frees every resource in \p dev.
130 * \sa drm_device and setup().
132 int drm_takedown( drm_device_t *dev )
134 drm_magic_entry_t *pt, *next;
136 drm_map_list_t *r_list;
137 struct list_head *list, *list_next;
138 drm_vma_entry_t *vma, *vma_next;
143 if (dev->driver->pretakedown)
144 dev->driver->pretakedown(dev);
147 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
152 if ( dev->irq_enabled ) drm_irq_uninstall( dev );
154 down( &dev->struct_sem );
155 del_timer( &dev->timer );
158 for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
159 for ( pt = dev->magiclist[i].head ; pt ; pt = next ) {
161 drm_free( pt, sizeof(*pt), DRM_MEM_MAGIC );
163 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
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;
171 /* Remove AGP resources, but leave dev->agp
172 intact until drv_cleanup is called. */
173 for ( entry = dev->agp->memory ; entry ; entry = nexte ) {
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 );
179 dev->agp->memory = NULL;
181 if ( dev->agp->acquired ) drm_agp_do_release(dev);
183 dev->agp->acquired = 0;
184 dev->agp->enabled = 0;
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 );
197 list_for_each_safe( list, list_next, &dev->maplist->head ) {
198 r_list = (drm_map_list_t *)list;
200 if ( ( map = r_list->map ) ) {
201 switch ( map->type ) {
203 case _DRM_FRAME_BUFFER:
204 if (drm_core_has_MTRR(dev)) {
205 if ( map->mtrr >= 0 ) {
207 retcode = mtrr_del( map->mtrr,
210 DRM_DEBUG( "mtrr_del=%d\n", retcode );
213 drm_ioremapfree( map->handle, map->size, dev );
220 /* Do nothing here, because this is all
221 * handled in the AGP/GART driver.
224 case _DRM_SCATTER_GATHER:
226 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
227 drm_sg_cleanup(dev->sg);
232 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
235 drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
237 drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
241 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) {
242 for ( i = 0 ; i < dev->queue_count ; i++ ) {
243 if ( dev->queuelist[i] ) {
244 drm_free( dev->queuelist[i],
245 sizeof(*dev->queuelist[0]),
247 dev->queuelist[i] = NULL;
250 drm_free( dev->queuelist,
251 dev->queue_slots * sizeof(*dev->queuelist),
253 dev->queuelist = NULL;
255 dev->queue_count = 0;
257 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
258 drm_dma_takedown( dev );
260 if ( dev->lock.hw_lock ) {
261 dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
262 dev->lock.filp = NULL;
263 wake_up_interruptible( &dev->lock.lock_queue );
265 up( &dev->struct_sem );
273 * Module initialization. Called via init_module at module load time, or via
274 * linux/init/main.c (this is not currently supported).
276 * \return zero on success or a negative number on failure.
278 * Initializes an array of drm_device structures, and attempts to
279 * initialize all available devices, using consecutive minors, registering the
280 * stubs and initializing the AGP device.
282 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
283 * after the initialization for driver customization.
285 int drm_init( struct drm_driver *driver )
287 struct pci_dev *pdev = NULL;
288 struct pci_device_id *pid;
295 for (i=0; driver->pci_driver.id_table[i].vendor != 0; i++) {
296 pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
299 /* pass back in pdev to account for multiple identical cards */
300 while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev)) != NULL) {
301 /* stealth mode requires a manual probe */
303 drm_get_dev(pdev, pid, driver);
308 EXPORT_SYMBOL(drm_init);
311 * Called via cleanup_module() at module unload time.
313 * Cleans up all DRM device, calling takedown().
317 static void drm_cleanup( drm_device_t *dev )
322 DRM_ERROR("cleanup called no dev\n");
328 drm_ctxbitmap_cleanup( dev );
330 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
331 dev->agp && dev->agp->agp_mtrr >= 0) {
333 retval = mtrr_del( dev->agp->agp_mtrr,
334 dev->agp->agp_info.aper_base,
335 dev->agp->agp_info.aper_size*1024*1024 );
336 DRM_DEBUG( "mtrr_del=%d\n", retval );
339 if (drm_core_has_AGP(dev) && dev->agp ) {
340 drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS );
344 if (dev->driver->postcleanup)
345 dev->driver->postcleanup(dev);
347 drm_put_head(&dev->primary);
348 if ( drm_put_dev(dev) )
349 DRM_ERROR( "Cannot unload module\n" );
352 void drm_exit (struct drm_driver *driver)
355 drm_device_t *dev = NULL;
360 for (i = 0; i < drm_cards_limit; i++) {
366 if (head->dev->driver!=driver)
371 /* release the pci driver */
373 pci_dev_put(dev->pdev);
376 DRM_INFO( "Module unloaded\n" );
378 EXPORT_SYMBOL(drm_exit);
380 /** File operations structure */
381 static struct file_operations drm_stub_fops = {
382 .owner = THIS_MODULE,
383 .open = drm_stub_open
386 static int __init drm_core_init(void)
390 drm_cards_limit = (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
391 drm_heads = drm_calloc(drm_cards_limit,
392 sizeof(*drm_heads), DRM_MEM_STUB);
396 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
399 drm_class = drm_sysfs_create(THIS_MODULE, "drm");
400 if (IS_ERR(drm_class)) {
401 printk (KERN_ERR "DRM: Error creating drm class.\n");
402 ret = PTR_ERR(drm_class);
406 drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL);
407 if (!drm_proc_root) {
408 DRM_ERROR("Cannot create /proc/dri\n");
413 DRM_INFO( "Initialized %s %d.%d.%d %s\n",
414 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL,
418 drm_sysfs_destroy(drm_class);
420 unregister_chrdev(DRM_MAJOR, "drm");
421 drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
426 static void __exit drm_core_exit (void)
428 remove_proc_entry("dri", NULL);
429 drm_sysfs_destroy(drm_class);
431 unregister_chrdev(DRM_MAJOR, "drm");
433 drm_free(drm_heads, sizeof(*drm_heads) *
434 drm_cards_limit, DRM_MEM_STUB);
438 module_init( drm_core_init );
439 module_exit( drm_core_exit );
443 * Get version information
445 * \param inode device inode.
446 * \param filp file pointer.
447 * \param cmd command.
448 * \param arg user argument, pointing to a drm_version structure.
449 * \return zero on success or negative number on failure.
451 * Fills in the version information in \p arg.
453 static int drm_version( struct inode *inode, struct file *filp,
454 unsigned int cmd, unsigned long arg )
456 drm_file_t *priv = filp->private_data;
457 drm_device_t *dev = priv->head->dev;
458 drm_version_t __user *argp = (void __user *)arg;
459 drm_version_t version;
462 if ( copy_from_user( &version, argp, sizeof(version) ) )
465 /* version is a required function to return the personality module version */
466 if ((ret = dev->driver->version(&version)))
469 if ( copy_to_user( argp, &version, sizeof(version) ) )
477 * Called whenever a process performs an ioctl on /dev/drm.
479 * \param inode device inode.
480 * \param filp file pointer.
481 * \param cmd command.
482 * \param arg user argument.
483 * \return zero on success or negative number on failure.
485 * Looks up the ioctl function in the ::ioctls table, checking for root
486 * previleges if so required, and dispatches to the respective function.
488 int drm_ioctl( struct inode *inode, struct file *filp,
489 unsigned int cmd, unsigned long arg )
491 drm_file_t *priv = filp->private_data;
492 drm_device_t *dev = priv->head->dev;
493 drm_ioctl_desc_t *ioctl;
495 unsigned int nr = DRM_IOCTL_NR(cmd);
496 int retcode = -EINVAL;
498 atomic_inc( &dev->ioctl_count );
499 atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] );
502 DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
503 current->pid, cmd, nr, (long)old_encode_dev(priv->head->device),
504 priv->authenticated );
506 if (nr < DRIVER_IOCTL_COUNT)
507 ioctl = &drm_ioctls[nr];
508 else if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
509 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
514 /* is there a local override? */
515 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
516 func = dev->driver->dma_ioctl;
519 DRM_DEBUG( "no function\n" );
521 } else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )||
522 ( ioctl->auth_needed && !priv->authenticated ) ) {
525 retcode = func( inode, filp, cmd, arg );
529 atomic_dec( &dev->ioctl_count );
530 if (retcode) DRM_DEBUG( "ret = %x\n", retcode);
533 EXPORT_SYMBOL(drm_ioctl);