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, ...)
104 if (drm_debug & request_level) {
106 printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
107 va_start(args, format);
108 vprintk(format, args);
112 EXPORT_SYMBOL(drm_ut_debug_printk);
114 static int drm_minor_get_id(struct drm_device *dev, int type)
117 int base = 0, limit = 63;
119 if (type == DRM_MINOR_CONTROL) {
122 } else if (type == DRM_MINOR_RENDER) {
127 mutex_lock(&dev->struct_mutex);
128 ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
129 mutex_unlock(&dev->struct_mutex);
131 return ret == -ENOSPC ? -EINVAL : ret;
134 struct drm_master *drm_master_create(struct drm_minor *minor)
136 struct drm_master *master;
138 master = kzalloc(sizeof(*master), GFP_KERNEL);
142 kref_init(&master->refcount);
143 spin_lock_init(&master->lock.spinlock);
144 init_waitqueue_head(&master->lock.lock_queue);
145 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
146 INIT_LIST_HEAD(&master->magicfree);
147 master->minor = minor;
149 list_add_tail(&master->head, &minor->master_list);
154 struct drm_master *drm_master_get(struct drm_master *master)
156 kref_get(&master->refcount);
159 EXPORT_SYMBOL(drm_master_get);
161 static void drm_master_destroy(struct kref *kref)
163 struct drm_master *master = container_of(kref, struct drm_master, refcount);
164 struct drm_magic_entry *pt, *next;
165 struct drm_device *dev = master->minor->dev;
166 struct drm_map_list *r_list, *list_temp;
168 list_del(&master->head);
170 if (dev->driver->master_destroy)
171 dev->driver->master_destroy(dev, master);
173 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
174 if (r_list->master == master) {
175 drm_rmmap_locked(dev, r_list->map);
180 if (master->unique) {
181 kfree(master->unique);
182 master->unique = NULL;
183 master->unique_len = 0;
189 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
191 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
195 drm_ht_remove(&master->magiclist);
200 void drm_master_put(struct drm_master **master)
202 kref_put(&(*master)->refcount, drm_master_destroy);
205 EXPORT_SYMBOL(drm_master_put);
207 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
208 struct drm_file *file_priv)
212 if (file_priv->is_master)
215 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
218 if (!file_priv->master)
221 if (file_priv->minor->master)
224 mutex_lock(&dev->struct_mutex);
225 file_priv->minor->master = drm_master_get(file_priv->master);
226 file_priv->is_master = 1;
227 if (dev->driver->master_set) {
228 ret = dev->driver->master_set(dev, file_priv, false);
229 if (unlikely(ret != 0)) {
230 file_priv->is_master = 0;
231 drm_master_put(&file_priv->minor->master);
234 mutex_unlock(&dev->struct_mutex);
239 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
240 struct drm_file *file_priv)
242 if (!file_priv->is_master)
245 if (!file_priv->minor->master)
248 mutex_lock(&dev->struct_mutex);
249 if (dev->driver->master_drop)
250 dev->driver->master_drop(dev, file_priv, false);
251 drm_master_put(&file_priv->minor->master);
252 file_priv->is_master = 0;
253 mutex_unlock(&dev->struct_mutex);
257 int drm_fill_in_dev(struct drm_device *dev,
258 const struct pci_device_id *ent,
259 struct drm_driver *driver)
263 if (dev->driver->bus->agp_init) {
264 retcode = dev->driver->bus->agp_init(dev);
273 EXPORT_SYMBOL(drm_fill_in_dev);
277 * Get a secondary minor number.
279 * \param dev device data structure
280 * \param sec-minor structure to hold the assigned minor
281 * \return negative number on failure.
283 * Search an empty entry and initialize it to the given parameters. This
284 * routines assigns minor numbers to secondary heads of multi-headed cards
286 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
288 struct drm_minor *new_minor;
294 minor_id = drm_minor_get_id(dev, type);
298 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
304 new_minor->type = type;
305 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
306 new_minor->dev = dev;
307 new_minor->index = minor_id;
308 INIT_LIST_HEAD(&new_minor->master_list);
310 idr_replace(&drm_minors_idr, new_minor, minor_id);
312 #if defined(CONFIG_DEBUG_FS)
313 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
315 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
320 ret = drm_sysfs_device_add(new_minor);
323 "DRM: Error sysfs_device_add.\n");
328 DRM_DEBUG("new minor assigned %d\n", minor_id);
333 #if defined(CONFIG_DEBUG_FS)
334 drm_debugfs_cleanup(new_minor);
339 idr_remove(&drm_minors_idr, minor_id);
343 EXPORT_SYMBOL(drm_get_minor);
346 * Put a secondary minor number.
348 * \param sec_minor - structure to be released
349 * \return always zero
351 int drm_put_minor(struct drm_minor **minor_p)
353 struct drm_minor *minor = *minor_p;
355 DRM_DEBUG("release secondary minor %d\n", minor->index);
357 #if defined(CONFIG_DEBUG_FS)
358 drm_debugfs_cleanup(minor);
361 drm_sysfs_device_remove(minor);
363 idr_remove(&drm_minors_idr, minor->index);
369 EXPORT_SYMBOL(drm_put_minor);
371 static void drm_unplug_minor(struct drm_minor *minor)
373 drm_sysfs_device_remove(minor);
377 * Called via drm_exit() at module unload time or when pci device is
380 * Cleans up all DRM device, calling drm_lastclose().
383 void drm_put_dev(struct drm_device *dev)
385 struct drm_driver *driver;
386 struct drm_map_list *r_list, *list_temp;
391 DRM_ERROR("cleanup called no dev\n");
394 driver = dev->driver;
398 if (dev->driver->unload)
399 dev->driver->unload(dev);
401 if (dev->driver->bus->agp_destroy)
402 dev->driver->bus->agp_destroy(dev);
404 drm_vblank_cleanup(dev);
406 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
407 drm_rmmap(dev, r_list->map);
408 drm_ht_remove(&dev->map_hash);
410 drm_ctxbitmap_cleanup(dev);
412 if (drm_core_check_feature(dev, DRIVER_MODESET))
413 drm_put_minor(&dev->control);
416 drm_put_minor(&dev->render);
418 if (driver->driver_features & DRIVER_GEM)
419 drm_gem_destroy(dev);
421 drm_put_minor(&dev->primary);
423 list_del(&dev->driver_item);
427 EXPORT_SYMBOL(drm_put_dev);
429 void drm_unplug_dev(struct drm_device *dev)
431 /* for a USB device */
432 if (drm_core_check_feature(dev, DRIVER_MODESET))
433 drm_unplug_minor(dev->control);
435 drm_unplug_minor(dev->render);
436 drm_unplug_minor(dev->primary);
438 mutex_lock(&drm_global_mutex);
440 drm_device_set_unplugged(dev);
442 if (dev->open_count == 0) {
445 mutex_unlock(&drm_global_mutex);
447 EXPORT_SYMBOL(drm_unplug_dev);
450 * drm_dev_alloc - Allocate new drm device
451 * @driver: DRM driver to allocate device for
452 * @parent: Parent device object
454 * Allocate and initialize a new DRM device. No device registration is done.
457 * Pointer to new DRM device, or NULL if out of memory.
459 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
460 struct device *parent)
462 struct drm_device *dev;
465 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
470 dev->driver = driver;
472 INIT_LIST_HEAD(&dev->filelist);
473 INIT_LIST_HEAD(&dev->ctxlist);
474 INIT_LIST_HEAD(&dev->vmalist);
475 INIT_LIST_HEAD(&dev->maplist);
476 INIT_LIST_HEAD(&dev->vblank_event_list);
478 spin_lock_init(&dev->count_lock);
479 spin_lock_init(&dev->event_lock);
480 mutex_init(&dev->struct_mutex);
481 mutex_init(&dev->ctxlist_mutex);
483 /* the DRM has 6 basic counters */
485 dev->types[0] = _DRM_STAT_LOCK;
486 dev->types[1] = _DRM_STAT_OPENS;
487 dev->types[2] = _DRM_STAT_CLOSES;
488 dev->types[3] = _DRM_STAT_IOCTLS;
489 dev->types[4] = _DRM_STAT_LOCKS;
490 dev->types[5] = _DRM_STAT_UNLOCKS;
492 if (drm_ht_create(&dev->map_hash, 12))
495 ret = drm_ctxbitmap_init(dev);
497 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
501 if (driver->driver_features & DRIVER_GEM) {
502 ret = drm_gem_init(dev);
504 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
512 drm_ctxbitmap_cleanup(dev);
514 drm_ht_remove(&dev->map_hash);
519 EXPORT_SYMBOL(drm_dev_alloc);