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_vblank_offdelay = 5000; /* Default to 5000 msecs. */
44 EXPORT_SYMBOL(drm_vblank_offdelay);
46 unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
47 EXPORT_SYMBOL(drm_timestamp_precision);
50 * Default to use monotonic timestamps for wait-for-vblank and page-flip
53 unsigned int drm_timestamp_monotonic = 1;
55 MODULE_AUTHOR(CORE_AUTHOR);
56 MODULE_DESCRIPTION(CORE_DESC);
57 MODULE_LICENSE("GPL and additional rights");
58 MODULE_PARM_DESC(debug, "Enable debug output");
59 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
60 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
61 MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
63 module_param_named(debug, drm_debug, int, 0600);
64 module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
65 module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
66 module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
68 struct idr drm_minors_idr;
70 struct class *drm_class;
71 struct proc_dir_entry *drm_proc_root;
72 struct dentry *drm_debugfs_root;
74 int drm_err(const char *func, const char *format, ...)
80 va_start(args, format);
85 r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
91 EXPORT_SYMBOL(drm_err);
93 void drm_ut_debug_printk(unsigned int request_level,
95 const char *function_name,
96 const char *format, ...)
100 if (drm_debug & request_level) {
102 printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
103 va_start(args, format);
104 vprintk(format, args);
108 EXPORT_SYMBOL(drm_ut_debug_printk);
110 static int drm_minor_get_id(struct drm_device *dev, int type)
114 int base = 0, limit = 63;
116 if (type == DRM_MINOR_CONTROL) {
119 } else if (type == DRM_MINOR_RENDER) {
125 if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
126 DRM_ERROR("Out of memory expanding drawable idr\n");
129 mutex_lock(&dev->struct_mutex);
130 ret = idr_get_new_above(&drm_minors_idr, NULL,
132 mutex_unlock(&dev->struct_mutex);
138 if (new_id >= limit) {
139 idr_remove(&drm_minors_idr, new_id);
145 struct drm_master *drm_master_create(struct drm_minor *minor)
147 struct drm_master *master;
149 master = kzalloc(sizeof(*master), GFP_KERNEL);
153 kref_init(&master->refcount);
154 spin_lock_init(&master->lock.spinlock);
155 init_waitqueue_head(&master->lock.lock_queue);
156 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
157 INIT_LIST_HEAD(&master->magicfree);
158 master->minor = minor;
160 list_add_tail(&master->head, &minor->master_list);
165 struct drm_master *drm_master_get(struct drm_master *master)
167 kref_get(&master->refcount);
170 EXPORT_SYMBOL(drm_master_get);
172 static void drm_master_destroy(struct kref *kref)
174 struct drm_master *master = container_of(kref, struct drm_master, refcount);
175 struct drm_magic_entry *pt, *next;
176 struct drm_device *dev = master->minor->dev;
177 struct drm_map_list *r_list, *list_temp;
179 list_del(&master->head);
181 if (dev->driver->master_destroy)
182 dev->driver->master_destroy(dev, master);
184 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
185 if (r_list->master == master) {
186 drm_rmmap_locked(dev, r_list->map);
191 if (master->unique) {
192 kfree(master->unique);
193 master->unique = NULL;
194 master->unique_len = 0;
200 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
202 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
206 drm_ht_remove(&master->magiclist);
211 void drm_master_put(struct drm_master **master)
213 kref_put(&(*master)->refcount, drm_master_destroy);
216 EXPORT_SYMBOL(drm_master_put);
218 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
219 struct drm_file *file_priv)
223 if (file_priv->is_master)
226 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
229 if (!file_priv->master)
232 if (file_priv->minor->master)
235 mutex_lock(&dev->struct_mutex);
236 file_priv->minor->master = drm_master_get(file_priv->master);
237 file_priv->is_master = 1;
238 if (dev->driver->master_set) {
239 ret = dev->driver->master_set(dev, file_priv, false);
240 if (unlikely(ret != 0)) {
241 file_priv->is_master = 0;
242 drm_master_put(&file_priv->minor->master);
245 mutex_unlock(&dev->struct_mutex);
250 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
251 struct drm_file *file_priv)
253 if (!file_priv->is_master)
256 if (!file_priv->minor->master)
259 mutex_lock(&dev->struct_mutex);
260 if (dev->driver->master_drop)
261 dev->driver->master_drop(dev, file_priv, false);
262 drm_master_put(&file_priv->minor->master);
263 file_priv->is_master = 0;
264 mutex_unlock(&dev->struct_mutex);
268 int drm_fill_in_dev(struct drm_device *dev,
269 const struct pci_device_id *ent,
270 struct drm_driver *driver)
274 INIT_LIST_HEAD(&dev->filelist);
275 INIT_LIST_HEAD(&dev->ctxlist);
276 INIT_LIST_HEAD(&dev->vmalist);
277 INIT_LIST_HEAD(&dev->maplist);
278 INIT_LIST_HEAD(&dev->vblank_event_list);
280 spin_lock_init(&dev->count_lock);
281 spin_lock_init(&dev->event_lock);
282 mutex_init(&dev->struct_mutex);
283 mutex_init(&dev->ctxlist_mutex);
285 if (drm_ht_create(&dev->map_hash, 12)) {
289 /* the DRM has 6 basic counters */
291 dev->types[0] = _DRM_STAT_LOCK;
292 dev->types[1] = _DRM_STAT_OPENS;
293 dev->types[2] = _DRM_STAT_CLOSES;
294 dev->types[3] = _DRM_STAT_IOCTLS;
295 dev->types[4] = _DRM_STAT_LOCKS;
296 dev->types[5] = _DRM_STAT_UNLOCKS;
298 dev->driver = driver;
300 if (dev->driver->bus->agp_init) {
301 retcode = dev->driver->bus->agp_init(dev);
303 goto error_out_unreg;
308 retcode = drm_ctxbitmap_init(dev);
310 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
311 goto error_out_unreg;
314 if (driver->driver_features & DRIVER_GEM) {
315 retcode = drm_gem_init(dev);
317 DRM_ERROR("Cannot initialize graphics execution "
319 goto error_out_unreg;
329 EXPORT_SYMBOL(drm_fill_in_dev);
333 * Get a secondary minor number.
335 * \param dev device data structure
336 * \param sec-minor structure to hold the assigned minor
337 * \return negative number on failure.
339 * Search an empty entry and initialize it to the given parameters, and
340 * create the proc init entry via proc_init(). This routines assigns
341 * minor numbers to secondary heads of multi-headed cards
343 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
345 struct drm_minor *new_minor;
351 minor_id = drm_minor_get_id(dev, type);
355 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
361 new_minor->type = type;
362 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
363 new_minor->dev = dev;
364 new_minor->index = minor_id;
365 INIT_LIST_HEAD(&new_minor->master_list);
367 idr_replace(&drm_minors_idr, new_minor, minor_id);
369 if (type == DRM_MINOR_LEGACY) {
370 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
372 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
376 new_minor->proc_root = NULL;
378 #if defined(CONFIG_DEBUG_FS)
379 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
381 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
386 ret = drm_sysfs_device_add(new_minor);
389 "DRM: Error sysfs_device_add.\n");
394 DRM_DEBUG("new minor assigned %d\n", minor_id);
399 if (new_minor->type == DRM_MINOR_LEGACY)
400 drm_proc_cleanup(new_minor, drm_proc_root);
404 idr_remove(&drm_minors_idr, minor_id);
408 EXPORT_SYMBOL(drm_get_minor);
411 * Put a secondary minor number.
413 * \param sec_minor - structure to be released
414 * \return always zero
416 * Cleans up the proc resources. Not legal for this to be the
417 * last minor released.
420 int drm_put_minor(struct drm_minor **minor_p)
422 struct drm_minor *minor = *minor_p;
424 DRM_DEBUG("release secondary minor %d\n", minor->index);
426 if (minor->type == DRM_MINOR_LEGACY)
427 drm_proc_cleanup(minor, drm_proc_root);
428 #if defined(CONFIG_DEBUG_FS)
429 drm_debugfs_cleanup(minor);
432 drm_sysfs_device_remove(minor);
434 idr_remove(&drm_minors_idr, minor->index);
440 EXPORT_SYMBOL(drm_put_minor);
442 static void drm_unplug_minor(struct drm_minor *minor)
444 drm_sysfs_device_remove(minor);
448 * Called via drm_exit() at module unload time or when pci device is
451 * Cleans up all DRM device, calling drm_lastclose().
454 void drm_put_dev(struct drm_device *dev)
456 struct drm_driver *driver;
457 struct drm_map_list *r_list, *list_temp;
462 DRM_ERROR("cleanup called no dev\n");
465 driver = dev->driver;
469 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
470 dev->agp && dev->agp->agp_mtrr >= 0) {
472 retval = mtrr_del(dev->agp->agp_mtrr,
473 dev->agp->agp_info.aper_base,
474 dev->agp->agp_info.aper_size * 1024 * 1024);
475 DRM_DEBUG("mtrr_del=%d\n", retval);
478 if (dev->driver->unload)
479 dev->driver->unload(dev);
481 if (drm_core_has_AGP(dev) && dev->agp) {
486 drm_vblank_cleanup(dev);
488 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
489 drm_rmmap(dev, r_list->map);
490 drm_ht_remove(&dev->map_hash);
492 drm_ctxbitmap_cleanup(dev);
494 if (drm_core_check_feature(dev, DRIVER_MODESET))
495 drm_put_minor(&dev->control);
497 if (driver->driver_features & DRIVER_GEM)
498 drm_gem_destroy(dev);
500 drm_put_minor(&dev->primary);
502 list_del(&dev->driver_item);
506 EXPORT_SYMBOL(drm_put_dev);
508 void drm_unplug_dev(struct drm_device *dev)
510 /* for a USB device */
511 if (drm_core_check_feature(dev, DRIVER_MODESET))
512 drm_unplug_minor(dev->control);
513 drm_unplug_minor(dev->primary);
515 mutex_lock(&drm_global_mutex);
517 drm_device_set_unplugged(dev);
519 if (dev->open_count == 0) {
522 mutex_unlock(&drm_global_mutex);
524 EXPORT_SYMBOL(drm_unplug_dev);