5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
11 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
31 * DEALINGS IN THE SOFTWARE.
34 #include <linux/module.h>
35 #include <linux/moduleparam.h>
36 #include <linux/slab.h>
38 #include <drm/drm_core.h>
40 unsigned int drm_debug = 0; /* 1 to enable debug output */
41 EXPORT_SYMBOL(drm_debug);
43 unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */
44 EXPORT_SYMBOL(drm_rnodes);
46 unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
47 EXPORT_SYMBOL(drm_vblank_offdelay);
49 unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
50 EXPORT_SYMBOL(drm_timestamp_precision);
53 * Default to use monotonic timestamps for wait-for-vblank and page-flip
56 unsigned int drm_timestamp_monotonic = 1;
58 MODULE_AUTHOR(CORE_AUTHOR);
59 MODULE_DESCRIPTION(CORE_DESC);
60 MODULE_LICENSE("GPL and additional rights");
61 MODULE_PARM_DESC(debug, "Enable debug output");
62 MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API");
63 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
64 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
65 MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
67 module_param_named(debug, drm_debug, int, 0600);
68 module_param_named(rnodes, drm_rnodes, int, 0600);
69 module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
70 module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
71 module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
73 struct idr drm_minors_idr;
75 struct class *drm_class;
76 struct dentry *drm_debugfs_root;
78 int drm_err(const char *func, const char *format, ...)
84 va_start(args, format);
89 r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
95 EXPORT_SYMBOL(drm_err);
97 void drm_ut_debug_printk(unsigned int request_level,
99 const char *function_name,
100 const char *format, ...)
102 struct va_format vaf;
105 if (drm_debug & request_level) {
106 va_start(args, format);
111 printk(KERN_DEBUG "[%s:%s], %pV", prefix,
112 function_name, &vaf);
114 printk(KERN_DEBUG "%pV", &vaf);
118 EXPORT_SYMBOL(drm_ut_debug_printk);
120 static int drm_minor_get_id(struct drm_device *dev, int type)
123 int base = 0, limit = 63;
125 if (type == DRM_MINOR_CONTROL) {
128 } else if (type == DRM_MINOR_RENDER) {
133 mutex_lock(&dev->struct_mutex);
134 ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
135 mutex_unlock(&dev->struct_mutex);
137 return ret == -ENOSPC ? -EINVAL : ret;
140 struct drm_master *drm_master_create(struct drm_minor *minor)
142 struct drm_master *master;
144 master = kzalloc(sizeof(*master), GFP_KERNEL);
148 kref_init(&master->refcount);
149 spin_lock_init(&master->lock.spinlock);
150 init_waitqueue_head(&master->lock.lock_queue);
151 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
152 INIT_LIST_HEAD(&master->magicfree);
153 master->minor = minor;
158 struct drm_master *drm_master_get(struct drm_master *master)
160 kref_get(&master->refcount);
163 EXPORT_SYMBOL(drm_master_get);
165 static void drm_master_destroy(struct kref *kref)
167 struct drm_master *master = container_of(kref, struct drm_master, refcount);
168 struct drm_magic_entry *pt, *next;
169 struct drm_device *dev = master->minor->dev;
170 struct drm_map_list *r_list, *list_temp;
172 if (dev->driver->master_destroy)
173 dev->driver->master_destroy(dev, master);
175 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
176 if (r_list->master == master) {
177 drm_rmmap_locked(dev, r_list->map);
182 if (master->unique) {
183 kfree(master->unique);
184 master->unique = NULL;
185 master->unique_len = 0;
191 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
193 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
197 drm_ht_remove(&master->magiclist);
202 void drm_master_put(struct drm_master **master)
204 kref_put(&(*master)->refcount, drm_master_destroy);
207 EXPORT_SYMBOL(drm_master_put);
209 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
210 struct drm_file *file_priv)
214 if (file_priv->is_master)
217 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
220 if (!file_priv->master)
223 if (file_priv->minor->master)
226 mutex_lock(&dev->struct_mutex);
227 file_priv->minor->master = drm_master_get(file_priv->master);
228 file_priv->is_master = 1;
229 if (dev->driver->master_set) {
230 ret = dev->driver->master_set(dev, file_priv, false);
231 if (unlikely(ret != 0)) {
232 file_priv->is_master = 0;
233 drm_master_put(&file_priv->minor->master);
236 mutex_unlock(&dev->struct_mutex);
241 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
242 struct drm_file *file_priv)
244 if (!file_priv->is_master)
247 if (!file_priv->minor->master)
250 mutex_lock(&dev->struct_mutex);
251 if (dev->driver->master_drop)
252 dev->driver->master_drop(dev, file_priv, false);
253 drm_master_put(&file_priv->minor->master);
254 file_priv->is_master = 0;
255 mutex_unlock(&dev->struct_mutex);
259 static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
263 case DRM_MINOR_LEGACY:
264 return &dev->primary;
265 case DRM_MINOR_RENDER:
267 case DRM_MINOR_CONTROL:
268 return &dev->control;
274 static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
276 struct drm_minor *minor;
278 minor = kzalloc(sizeof(*minor), GFP_KERNEL);
285 *drm_minor_get_slot(dev, type) = minor;
290 * drm_get_minor - Register DRM minor
292 * @type: Type of minor
294 * Register minor of given type.
295 * Caller must hold the global DRM mutex.
298 * 0 on success, negative error code on failure.
300 static int drm_get_minor(struct drm_device *dev, unsigned int type)
302 struct drm_minor *new_minor;
308 new_minor = *drm_minor_get_slot(dev, type);
312 minor_id = drm_minor_get_id(dev, type);
316 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
317 new_minor->index = minor_id;
319 idr_replace(&drm_minors_idr, new_minor, minor_id);
321 #if defined(CONFIG_DEBUG_FS)
322 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
324 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
329 ret = drm_sysfs_device_add(new_minor);
332 "DRM: Error sysfs_device_add.\n");
336 DRM_DEBUG("new minor assigned %d\n", minor_id);
341 #if defined(CONFIG_DEBUG_FS)
342 drm_debugfs_cleanup(new_minor);
345 idr_remove(&drm_minors_idr, minor_id);
350 * drm_unplug_minor - Unplug DRM minor
351 * @minor: Minor to unplug
353 * Unplugs the given DRM minor but keeps the object. So after this returns,
354 * minor->dev is still valid so existing open-files can still access it to get
355 * device information from their drm_file ojects.
356 * If the minor is already unplugged or if @minor is NULL, nothing is done.
357 * The global DRM mutex must be held by the caller.
359 static void drm_unplug_minor(struct drm_minor *minor)
361 if (!minor || !minor->kdev)
364 #if defined(CONFIG_DEBUG_FS)
365 drm_debugfs_cleanup(minor);
368 drm_sysfs_device_remove(minor);
369 idr_remove(&drm_minors_idr, minor->index);
373 * drm_minor_acquire - Acquire a DRM minor
374 * @minor_id: Minor ID of the DRM-minor
376 * Looks up the given minor-ID and returns the respective DRM-minor object. The
377 * refence-count of the underlying device is increased so you must release this
378 * object with drm_minor_release().
380 * As long as you hold this minor, it is guaranteed that the object and the
381 * minor->dev pointer will stay valid! However, the device may get unplugged and
382 * unregistered while you hold the minor.
385 * Pointer to minor-object with increased device-refcount, or PTR_ERR on
388 struct drm_minor *drm_minor_acquire(unsigned int minor_id)
390 struct drm_minor *minor;
392 minor = idr_find(&drm_minors_idr, minor_id);
394 return ERR_PTR(-ENODEV);
396 drm_dev_ref(minor->dev);
401 * drm_minor_release - Release DRM minor
402 * @minor: Pointer to DRM minor object
404 * Release a minor that was previously acquired via drm_minor_acquire().
406 void drm_minor_release(struct drm_minor *minor)
408 drm_dev_unref(minor->dev);
412 * drm_put_minor - Destroy DRM minor
413 * @minor: Minor to destroy
415 * This calls drm_unplug_minor() on the given minor and then frees it. Nothing
416 * is done if @minor is NULL. It is fine to call this on already unplugged
418 * The global DRM mutex must be held by the caller.
420 static void drm_put_minor(struct drm_minor *minor)
425 DRM_DEBUG("release secondary minor %d\n", minor->index);
427 drm_unplug_minor(minor);
432 * Called via drm_exit() at module unload time or when pci device is
435 * Cleans up all DRM device, calling drm_lastclose().
438 void drm_put_dev(struct drm_device *dev)
443 DRM_ERROR("cleanup called no dev\n");
447 drm_dev_unregister(dev);
450 EXPORT_SYMBOL(drm_put_dev);
452 void drm_unplug_dev(struct drm_device *dev)
454 /* for a USB device */
455 if (drm_core_check_feature(dev, DRIVER_MODESET))
456 drm_unplug_minor(dev->control);
458 drm_unplug_minor(dev->render);
459 drm_unplug_minor(dev->primary);
461 mutex_lock(&drm_global_mutex);
463 drm_device_set_unplugged(dev);
465 if (dev->open_count == 0) {
468 mutex_unlock(&drm_global_mutex);
470 EXPORT_SYMBOL(drm_unplug_dev);
473 * drm_dev_alloc - Allocate new drm device
474 * @driver: DRM driver to allocate device for
475 * @parent: Parent device object
477 * Allocate and initialize a new DRM device. No device registration is done.
478 * Call drm_dev_register() to advertice the device to user space and register it
479 * with other core subsystems.
482 * Pointer to new DRM device, or NULL if out of memory.
484 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
485 struct device *parent)
487 struct drm_device *dev;
490 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
495 dev->driver = driver;
497 INIT_LIST_HEAD(&dev->filelist);
498 INIT_LIST_HEAD(&dev->ctxlist);
499 INIT_LIST_HEAD(&dev->vmalist);
500 INIT_LIST_HEAD(&dev->maplist);
501 INIT_LIST_HEAD(&dev->vblank_event_list);
503 spin_lock_init(&dev->count_lock);
504 spin_lock_init(&dev->event_lock);
505 mutex_init(&dev->struct_mutex);
506 mutex_init(&dev->ctxlist_mutex);
508 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
509 ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
514 if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
515 ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
519 ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY);
523 dev->anon_inode = drm_fs_inode_new();
524 if (IS_ERR(dev->anon_inode)) {
525 ret = PTR_ERR(dev->anon_inode);
526 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret);
530 if (drm_ht_create(&dev->map_hash, 12))
533 ret = drm_ctxbitmap_init(dev);
535 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
539 if (driver->driver_features & DRIVER_GEM) {
540 ret = drm_gem_init(dev);
542 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
550 drm_ctxbitmap_cleanup(dev);
552 drm_ht_remove(&dev->map_hash);
554 drm_fs_inode_free(dev->anon_inode);
556 drm_put_minor(dev->control);
557 drm_put_minor(dev->render);
558 drm_put_minor(dev->primary);
562 EXPORT_SYMBOL(drm_dev_alloc);
565 * drm_dev_free - Free DRM device
566 * @dev: DRM device to free
568 * Free a DRM device that has previously been allocated via drm_dev_alloc().
569 * You must not use kfree() instead or you will leak memory.
571 * This must not be called once the device got registered. Use drm_put_dev()
572 * instead, which then calls drm_dev_free().
574 void drm_dev_free(struct drm_device *dev)
576 drm_put_minor(dev->control);
577 drm_put_minor(dev->render);
578 drm_put_minor(dev->primary);
580 if (dev->driver->driver_features & DRIVER_GEM)
581 drm_gem_destroy(dev);
583 drm_ctxbitmap_cleanup(dev);
584 drm_ht_remove(&dev->map_hash);
585 drm_fs_inode_free(dev->anon_inode);
590 EXPORT_SYMBOL(drm_dev_free);
593 * drm_dev_register - Register DRM device
594 * @dev: Device to register
596 * Register the DRM device @dev with the system, advertise device to user-space
597 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
600 * Never call this twice on any device!
603 * 0 on success, negative error code on failure.
605 int drm_dev_register(struct drm_device *dev, unsigned long flags)
609 mutex_lock(&drm_global_mutex);
611 ret = drm_get_minor(dev, DRM_MINOR_CONTROL);
615 ret = drm_get_minor(dev, DRM_MINOR_RENDER);
619 ret = drm_get_minor(dev, DRM_MINOR_LEGACY);
623 if (dev->driver->load) {
624 ret = dev->driver->load(dev, flags);
629 /* setup grouping for legacy outputs */
630 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
631 ret = drm_mode_group_init_legacy_group(dev,
632 &dev->primary->mode_group);
641 if (dev->driver->unload)
642 dev->driver->unload(dev);
644 drm_unplug_minor(dev->control);
645 drm_unplug_minor(dev->render);
646 drm_unplug_minor(dev->primary);
648 mutex_unlock(&drm_global_mutex);
651 EXPORT_SYMBOL(drm_dev_register);
654 * drm_dev_unregister - Unregister DRM device
655 * @dev: Device to unregister
657 * Unregister the DRM device from the system. This does the reverse of
658 * drm_dev_register() but does not deallocate the device. The caller must call
659 * drm_dev_free() to free all resources.
661 void drm_dev_unregister(struct drm_device *dev)
663 struct drm_map_list *r_list, *list_temp;
667 if (dev->driver->unload)
668 dev->driver->unload(dev);
671 drm_pci_agp_destroy(dev);
673 drm_vblank_cleanup(dev);
675 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
676 drm_rmmap(dev, r_list->map);
678 drm_unplug_minor(dev->control);
679 drm_unplug_minor(dev->render);
680 drm_unplug_minor(dev->primary);
682 EXPORT_SYMBOL(drm_dev_unregister);