blob: 74e0357c1c38efdc7cf0658774698be4f3e0a630 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * \file drm_stub.h
3 * Stub support
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 */
7
8/*
9 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
10 *
11 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
13 *
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:
20 *
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
23 * Software.
24 *
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.
32 */
33
34#include <linux/module.h>
35#include <linux/moduleparam.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090036#include <linux/slab.h>
David Howells760285e2012-10-02 18:01:07 +010037#include <drm/drmP.h>
38#include <drm/drm_core.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Dave Airlieb5e89ed2005-09-25 14:28:13 +100040unsigned int drm_debug = 0; /* 1 to enable debug output */
Linus Torvalds1da177e2005-04-16 15:20:36 -070041EXPORT_SYMBOL(drm_debug);
42
David Herrmann17931262013-08-25 18:29:00 +020043unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */
44EXPORT_SYMBOL(drm_rnodes);
45
Mario Kleiner27641c32010-10-23 04:20:23 +020046unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
47EXPORT_SYMBOL(drm_vblank_offdelay);
48
49unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
50EXPORT_SYMBOL(drm_timestamp_precision);
51
Imre Deakc61eef72012-10-23 18:53:26 +000052/*
53 * Default to use monotonic timestamps for wait-for-vblank and page-flip
54 * complete events.
55 */
56unsigned int drm_timestamp_monotonic = 1;
57
Dave Airlieb5e89ed2005-09-25 14:28:13 +100058MODULE_AUTHOR(CORE_AUTHOR);
59MODULE_DESCRIPTION(CORE_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060MODULE_LICENSE("GPL and additional rights");
Linus Torvalds1da177e2005-04-16 15:20:36 -070061MODULE_PARM_DESC(debug, "Enable debug output");
David Herrmann17931262013-08-25 18:29:00 +020062MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API");
Mario Kleiner27641c32010-10-23 04:20:23 +020063MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
64MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
Imre Deakc61eef72012-10-23 18:53:26 +000065MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Dave Jonesc0758142005-10-03 15:02:20 -040067module_param_named(debug, drm_debug, int, 0600);
David Herrmann17931262013-08-25 18:29:00 +020068module_param_named(rnodes, drm_rnodes, int, 0600);
Mario Kleiner27641c32010-10-23 04:20:23 +020069module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
70module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
Imre Deakc61eef72012-10-23 18:53:26 +000071module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Dave Airlie2c14f282008-04-21 16:47:32 +100073struct idr drm_minors_idr;
74
Greg Kroah-Hartman0650fd52006-01-20 14:08:59 -080075struct class *drm_class;
Ben Gamari955b12d2009-02-17 20:08:49 -050076struct dentry *drm_debugfs_root;
Joe Perches5ad3d882011-04-17 20:35:51 -070077
78int drm_err(const char *func, const char *format, ...)
79{
80 struct va_format vaf;
81 va_list args;
82 int r;
83
84 va_start(args, format);
85
86 vaf.fmt = format;
87 vaf.va = &args;
88
89 r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
90
91 va_end(args);
92
93 return r;
94}
95EXPORT_SYMBOL(drm_err);
96
yakui_zhao4fefcb22009-06-02 14:09:47 +080097void drm_ut_debug_printk(unsigned int request_level,
98 const char *prefix,
99 const char *function_name,
100 const char *format, ...)
101{
Daniel Vetterfffb9062013-11-17 22:25:02 +0100102 struct va_format vaf;
yakui_zhao4fefcb22009-06-02 14:09:47 +0800103 va_list args;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
yakui_zhao4fefcb22009-06-02 14:09:47 +0800105 if (drm_debug & request_level) {
yakui_zhao4fefcb22009-06-02 14:09:47 +0800106 va_start(args, format);
Daniel Vetterfffb9062013-11-17 22:25:02 +0100107 vaf.fmt = format;
108 vaf.va = &args;
109
110 if (function_name)
111 printk(KERN_DEBUG "[%s:%s], %pV", prefix,
112 function_name, &vaf);
113 else
114 printk(KERN_DEBUG "%pV", &vaf);
yakui_zhao4fefcb22009-06-02 14:09:47 +0800115 va_end(args);
116 }
117}
118EXPORT_SYMBOL(drm_ut_debug_printk);
Joe Perches5ad3d882011-04-17 20:35:51 -0700119
Dave Airlie2c14f282008-04-21 16:47:32 +1000120static int drm_minor_get_id(struct drm_device *dev, int type)
121{
Dave Airlie2c14f282008-04-21 16:47:32 +1000122 int ret;
123 int base = 0, limit = 63;
124
Dave Airlief453ba02008-11-07 14:05:41 -0800125 if (type == DRM_MINOR_CONTROL) {
Kristian Høgsberg24f40032013-08-08 19:10:21 +0200126 base += 64;
127 limit = base + 63;
128 } else if (type == DRM_MINOR_RENDER) {
129 base += 128;
130 limit = base + 63;
131 }
Dave Airlief453ba02008-11-07 14:05:41 -0800132
Dave Airlie2c14f282008-04-21 16:47:32 +1000133 mutex_lock(&dev->struct_mutex);
Tejun Heo2e928812013-02-27 17:04:08 -0800134 ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
Dave Airlie2c14f282008-04-21 16:47:32 +1000135 mutex_unlock(&dev->struct_mutex);
Dave Airlie2c14f282008-04-21 16:47:32 +1000136
Tejun Heo2e928812013-02-27 17:04:08 -0800137 return ret == -ENOSPC ? -EINVAL : ret;
Dave Airlie2c14f282008-04-21 16:47:32 +1000138}
139
Dave Airlie7c1c2872008-11-28 14:22:24 +1000140struct drm_master *drm_master_create(struct drm_minor *minor)
141{
142 struct drm_master *master;
143
Eric Anholt9a298b22009-03-24 12:23:04 -0700144 master = kzalloc(sizeof(*master), GFP_KERNEL);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000145 if (!master)
146 return NULL;
147
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;
154
155 list_add_tail(&master->head, &minor->master_list);
156
157 return master;
158}
159
160struct drm_master *drm_master_get(struct drm_master *master)
161{
162 kref_get(&master->refcount);
163 return master;
164}
Thomas Hellstrom85bb0c32009-12-06 21:46:28 +0100165EXPORT_SYMBOL(drm_master_get);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000166
167static void drm_master_destroy(struct kref *kref)
168{
169 struct drm_master *master = container_of(kref, struct drm_master, refcount);
170 struct drm_magic_entry *pt, *next;
171 struct drm_device *dev = master->minor->dev;
Dave Airliec1ff85d2009-01-19 17:17:58 +1000172 struct drm_map_list *r_list, *list_temp;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000173
174 list_del(&master->head);
175
176 if (dev->driver->master_destroy)
177 dev->driver->master_destroy(dev, master);
178
Dave Airliec1ff85d2009-01-19 17:17:58 +1000179 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
180 if (r_list->master == master) {
181 drm_rmmap_locked(dev, r_list->map);
182 r_list = NULL;
183 }
184 }
185
Dave Airlie7c1c2872008-11-28 14:22:24 +1000186 if (master->unique) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700187 kfree(master->unique);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000188 master->unique = NULL;
189 master->unique_len = 0;
190 }
191
Chris Wilson6e350232010-07-24 18:29:36 +0100192 kfree(dev->devname);
193 dev->devname = NULL;
194
Dave Airlie7c1c2872008-11-28 14:22:24 +1000195 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
196 list_del(&pt->head);
197 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
Eric Anholt9a298b22009-03-24 12:23:04 -0700198 kfree(pt);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000199 }
200
201 drm_ht_remove(&master->magiclist);
202
Eric Anholt9a298b22009-03-24 12:23:04 -0700203 kfree(master);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000204}
205
206void drm_master_put(struct drm_master **master)
207{
208 kref_put(&(*master)->refcount, drm_master_destroy);
209 *master = NULL;
210}
Thomas Hellstrom85bb0c32009-12-06 21:46:28 +0100211EXPORT_SYMBOL(drm_master_put);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000212
213int drm_setmaster_ioctl(struct drm_device *dev, void *data,
214 struct drm_file *file_priv)
215{
Benjamin Gaignard53ef1602013-06-26 17:58:59 +0200216 int ret = 0;
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000217
Jonas Bonn6b008422009-04-16 09:00:02 +0200218 if (file_priv->is_master)
219 return 0;
220
Dave Airlie7c1c2872008-11-28 14:22:24 +1000221 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
222 return -EINVAL;
223
224 if (!file_priv->master)
225 return -EINVAL;
226
David Herrmann08bec5b2012-11-15 13:04:37 +0000227 if (file_priv->minor->master)
228 return -EINVAL;
229
230 mutex_lock(&dev->struct_mutex);
231 file_priv->minor->master = drm_master_get(file_priv->master);
232 file_priv->is_master = 1;
233 if (dev->driver->master_set) {
234 ret = dev->driver->master_set(dev, file_priv, false);
235 if (unlikely(ret != 0)) {
236 file_priv->is_master = 0;
237 drm_master_put(&file_priv->minor->master);
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000238 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000239 }
David Herrmann08bec5b2012-11-15 13:04:37 +0000240 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000241
Benjamin Gaignard53ef1602013-06-26 17:58:59 +0200242 return ret;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000243}
244
245int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
246 struct drm_file *file_priv)
247{
Jonas Bonn6b008422009-04-16 09:00:02 +0200248 if (!file_priv->is_master)
Dave Airlie7c1c2872008-11-28 14:22:24 +1000249 return -EINVAL;
Jonas Bonn6b008422009-04-16 09:00:02 +0200250
Dave Airlie07f1c7a2009-04-20 09:32:50 +1000251 if (!file_priv->minor->master)
252 return -EINVAL;
253
Dave Airlie7c1c2872008-11-28 14:22:24 +1000254 mutex_lock(&dev->struct_mutex);
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000255 if (dev->driver->master_drop)
256 dev->driver->master_drop(dev, file_priv, false);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000257 drm_master_put(&file_priv->minor->master);
Jonas Bonn6b008422009-04-16 09:00:02 +0200258 file_priv->is_master = 0;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000259 mutex_unlock(&dev->struct_mutex);
260 return 0;
261}
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263/**
David Herrmanna99ee452013-10-20 18:55:42 +0200264 * drm_get_minor - Allocate and register new DRM minor
265 * @dev: DRM device
266 * @minor: Pointer to where new minor is stored
267 * @type: Type of minor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 *
David Herrmanna99ee452013-10-20 18:55:42 +0200269 * Allocate a new minor of the given type and register it. A pointer to the new
270 * minor is returned in @minor.
271 * Caller must hold the global DRM mutex.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 *
David Herrmanna99ee452013-10-20 18:55:42 +0200273 * RETURNS:
274 * 0 on success, negative error code on failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 */
David Herrmanna99ee452013-10-20 18:55:42 +0200276static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor,
277 int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
Dave Airlie2c14f282008-04-21 16:47:32 +1000279 struct drm_minor *new_minor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 int ret;
Dave Airlie2c14f282008-04-21 16:47:32 +1000281 int minor_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283 DRM_DEBUG("\n");
284
Dave Airlie2c14f282008-04-21 16:47:32 +1000285 minor_id = drm_minor_get_id(dev, type);
286 if (minor_id < 0)
287 return minor_id;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000288
Dave Airlie2c14f282008-04-21 16:47:32 +1000289 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
290 if (!new_minor) {
291 ret = -ENOMEM;
292 goto err_idr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 }
Dave Airlie2c14f282008-04-21 16:47:32 +1000294
295 new_minor->type = type;
296 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
297 new_minor->dev = dev;
298 new_minor->index = minor_id;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000299 INIT_LIST_HEAD(&new_minor->master_list);
Dave Airlie2c14f282008-04-21 16:47:32 +1000300
301 idr_replace(&drm_minors_idr, new_minor, minor_id);
302
Ben Gamari955b12d2009-02-17 20:08:49 -0500303#if defined(CONFIG_DEBUG_FS)
304 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
305 if (ret) {
GeunSik Lim156f5a72009-06-02 15:01:37 +0900306 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
Daniel Vettercb6458f2013-08-08 15:41:34 +0200307 goto err_mem;
Ben Gamari955b12d2009-02-17 20:08:49 -0500308 }
309#endif
Dave Airlie2c14f282008-04-21 16:47:32 +1000310
311 ret = drm_sysfs_device_add(new_minor);
312 if (ret) {
313 printk(KERN_ERR
314 "DRM: Error sysfs_device_add.\n");
Daniel Vettercb6458f2013-08-08 15:41:34 +0200315 goto err_debugfs;
Dave Airlie2c14f282008-04-21 16:47:32 +1000316 }
317 *minor = new_minor;
318
319 DRM_DEBUG("new minor assigned %d\n", minor_id);
320 return 0;
321
322
Daniel Vettercb6458f2013-08-08 15:41:34 +0200323err_debugfs:
324#if defined(CONFIG_DEBUG_FS)
325 drm_debugfs_cleanup(new_minor);
Dave Airlie2c14f282008-04-21 16:47:32 +1000326err_mem:
Daniel Vettercb6458f2013-08-08 15:41:34 +0200327#endif
Dave Airlie2c14f282008-04-21 16:47:32 +1000328 kfree(new_minor);
329err_idr:
330 idr_remove(&drm_minors_idr, minor_id);
331 *minor = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 return ret;
333}
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000334
Dave Airliec94f7022005-07-07 21:03:38 +1000335/**
David Herrmannf73aca52013-10-20 18:55:40 +0200336 * drm_unplug_minor - Unplug DRM minor
337 * @minor: Minor to unplug
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 *
David Herrmannf73aca52013-10-20 18:55:40 +0200339 * Unplugs the given DRM minor but keeps the object. So after this returns,
340 * minor->dev is still valid so existing open-files can still access it to get
341 * device information from their drm_file ojects.
342 * If the minor is already unplugged or if @minor is NULL, nothing is done.
343 * The global DRM mutex must be held by the caller.
344 */
345static void drm_unplug_minor(struct drm_minor *minor)
346{
David Herrmanna3483352013-11-13 11:42:26 +0100347 if (!minor || !minor->kdev)
David Herrmannf73aca52013-10-20 18:55:40 +0200348 return;
349
David Herrmann865fb472013-10-20 18:55:43 +0200350#if defined(CONFIG_DEBUG_FS)
351 drm_debugfs_cleanup(minor);
352#endif
353
David Herrmannf73aca52013-10-20 18:55:40 +0200354 drm_sysfs_device_remove(minor);
David Herrmannf67e9462013-10-20 18:55:44 +0200355 idr_remove(&drm_minors_idr, minor->index);
David Herrmannf73aca52013-10-20 18:55:40 +0200356}
357
358/**
359 * drm_put_minor - Destroy DRM minor
David Herrmann4ac387f2013-10-20 18:55:41 +0200360 * @minor: Minor to destroy
David Herrmannf73aca52013-10-20 18:55:40 +0200361 *
David Herrmann4ac387f2013-10-20 18:55:41 +0200362 * This calls drm_unplug_minor() on the given minor and then frees it. Nothing
363 * is done if @minor is NULL. It is fine to call this on already unplugged
364 * minors.
David Herrmannf73aca52013-10-20 18:55:40 +0200365 * The global DRM mutex must be held by the caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 */
David Herrmann4ac387f2013-10-20 18:55:41 +0200367static void drm_put_minor(struct drm_minor *minor)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368{
David Herrmann4ac387f2013-10-20 18:55:41 +0200369 if (!minor)
370 return;
Eric Anholt673a3942008-07-30 12:06:12 -0700371
Dave Airlie2c14f282008-04-21 16:47:32 +1000372 DRM_DEBUG("release secondary minor %d\n", minor->index);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000373
David Herrmannf73aca52013-10-20 18:55:40 +0200374 drm_unplug_minor(minor);
Dave Airlie2c14f282008-04-21 16:47:32 +1000375 kfree(minor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376}
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500377
378/**
379 * Called via drm_exit() at module unload time or when pci device is
380 * unplugged.
381 *
382 * Cleans up all DRM device, calling drm_lastclose().
383 *
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500384 */
385void drm_put_dev(struct drm_device *dev)
386{
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500387 DRM_DEBUG("\n");
388
389 if (!dev) {
390 DRM_ERROR("cleanup called no dev\n");
391 return;
392 }
393
David Herrmannc3a49732013-10-02 11:23:38 +0200394 drm_dev_unregister(dev);
David Herrmann0dc8fe52013-10-02 11:23:37 +0200395 drm_dev_free(dev);
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500396}
397EXPORT_SYMBOL(drm_put_dev);
Dave Airlie2c07a212012-02-20 14:18:07 +0000398
399void drm_unplug_dev(struct drm_device *dev)
400{
401 /* for a USB device */
402 if (drm_core_check_feature(dev, DRIVER_MODESET))
403 drm_unplug_minor(dev->control);
David Herrmann17931262013-08-25 18:29:00 +0200404 if (dev->render)
405 drm_unplug_minor(dev->render);
Dave Airlie2c07a212012-02-20 14:18:07 +0000406 drm_unplug_minor(dev->primary);
407
408 mutex_lock(&drm_global_mutex);
409
410 drm_device_set_unplugged(dev);
411
412 if (dev->open_count == 0) {
413 drm_put_dev(dev);
414 }
415 mutex_unlock(&drm_global_mutex);
416}
417EXPORT_SYMBOL(drm_unplug_dev);
David Herrmann1bb72532013-10-02 11:23:34 +0200418
419/**
420 * drm_dev_alloc - Allocate new drm device
421 * @driver: DRM driver to allocate device for
422 * @parent: Parent device object
423 *
424 * Allocate and initialize a new DRM device. No device registration is done.
David Herrmannc22f0ac2013-10-02 11:23:35 +0200425 * Call drm_dev_register() to advertice the device to user space and register it
426 * with other core subsystems.
David Herrmann1bb72532013-10-02 11:23:34 +0200427 *
428 * RETURNS:
429 * Pointer to new DRM device, or NULL if out of memory.
430 */
431struct drm_device *drm_dev_alloc(struct drm_driver *driver,
432 struct device *parent)
433{
434 struct drm_device *dev;
435 int ret;
436
437 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
438 if (!dev)
439 return NULL;
440
441 dev->dev = parent;
442 dev->driver = driver;
443
444 INIT_LIST_HEAD(&dev->filelist);
445 INIT_LIST_HEAD(&dev->ctxlist);
446 INIT_LIST_HEAD(&dev->vmalist);
447 INIT_LIST_HEAD(&dev->maplist);
448 INIT_LIST_HEAD(&dev->vblank_event_list);
449
450 spin_lock_init(&dev->count_lock);
451 spin_lock_init(&dev->event_lock);
452 mutex_init(&dev->struct_mutex);
453 mutex_init(&dev->ctxlist_mutex);
454
David Herrmann1bb72532013-10-02 11:23:34 +0200455 if (drm_ht_create(&dev->map_hash, 12))
456 goto err_free;
457
458 ret = drm_ctxbitmap_init(dev);
459 if (ret) {
460 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
461 goto err_ht;
462 }
463
464 if (driver->driver_features & DRIVER_GEM) {
465 ret = drm_gem_init(dev);
466 if (ret) {
467 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
468 goto err_ctxbitmap;
469 }
470 }
471
472 return dev;
473
474err_ctxbitmap:
475 drm_ctxbitmap_cleanup(dev);
476err_ht:
477 drm_ht_remove(&dev->map_hash);
478err_free:
479 kfree(dev);
480 return NULL;
481}
482EXPORT_SYMBOL(drm_dev_alloc);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200483
484/**
David Herrmann0dc8fe52013-10-02 11:23:37 +0200485 * drm_dev_free - Free DRM device
486 * @dev: DRM device to free
487 *
488 * Free a DRM device that has previously been allocated via drm_dev_alloc().
489 * You must not use kfree() instead or you will leak memory.
490 *
491 * This must not be called once the device got registered. Use drm_put_dev()
492 * instead, which then calls drm_dev_free().
493 */
494void drm_dev_free(struct drm_device *dev)
495{
David Herrmann8f6599d2013-10-20 18:55:45 +0200496 drm_put_minor(dev->control);
497 drm_put_minor(dev->render);
498 drm_put_minor(dev->primary);
499
David Herrmann0dc8fe52013-10-02 11:23:37 +0200500 if (dev->driver->driver_features & DRIVER_GEM)
501 drm_gem_destroy(dev);
502
503 drm_ctxbitmap_cleanup(dev);
504 drm_ht_remove(&dev->map_hash);
505
506 kfree(dev->devname);
507 kfree(dev);
508}
509EXPORT_SYMBOL(drm_dev_free);
510
511/**
David Herrmannc22f0ac2013-10-02 11:23:35 +0200512 * drm_dev_register - Register DRM device
513 * @dev: Device to register
514 *
515 * Register the DRM device @dev with the system, advertise device to user-space
516 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
517 * previously.
518 *
519 * Never call this twice on any device!
520 *
521 * RETURNS:
522 * 0 on success, negative error code on failure.
523 */
524int drm_dev_register(struct drm_device *dev, unsigned long flags)
525{
526 int ret;
527
528 mutex_lock(&drm_global_mutex);
529
530 if (dev->driver->bus->agp_init) {
531 ret = dev->driver->bus->agp_init(dev);
532 if (ret)
533 goto out_unlock;
534 }
535
536 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
537 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
538 if (ret)
539 goto err_agp;
540 }
541
542 if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
543 ret = drm_get_minor(dev, &dev->render, DRM_MINOR_RENDER);
544 if (ret)
545 goto err_control_node;
546 }
547
548 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
549 if (ret)
550 goto err_render_node;
551
552 if (dev->driver->load) {
553 ret = dev->driver->load(dev, flags);
554 if (ret)
555 goto err_primary_node;
556 }
557
558 /* setup grouping for legacy outputs */
559 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
560 ret = drm_mode_group_init_legacy_group(dev,
561 &dev->primary->mode_group);
562 if (ret)
563 goto err_unload;
564 }
565
566 list_add_tail(&dev->driver_item, &dev->driver->device_list);
567
568 ret = 0;
569 goto out_unlock;
570
571err_unload:
572 if (dev->driver->unload)
573 dev->driver->unload(dev);
574err_primary_node:
David Herrmann4ac387f2013-10-20 18:55:41 +0200575 drm_put_minor(dev->primary);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200576err_render_node:
David Herrmann4ac387f2013-10-20 18:55:41 +0200577 drm_put_minor(dev->render);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200578err_control_node:
David Herrmann4ac387f2013-10-20 18:55:41 +0200579 drm_put_minor(dev->control);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200580err_agp:
581 if (dev->driver->bus->agp_destroy)
582 dev->driver->bus->agp_destroy(dev);
583out_unlock:
584 mutex_unlock(&drm_global_mutex);
585 return ret;
586}
587EXPORT_SYMBOL(drm_dev_register);
David Herrmannc3a49732013-10-02 11:23:38 +0200588
589/**
590 * drm_dev_unregister - Unregister DRM device
591 * @dev: Device to unregister
592 *
593 * Unregister the DRM device from the system. This does the reverse of
594 * drm_dev_register() but does not deallocate the device. The caller must call
595 * drm_dev_free() to free all resources.
596 */
597void drm_dev_unregister(struct drm_device *dev)
598{
599 struct drm_map_list *r_list, *list_temp;
600
601 drm_lastclose(dev);
602
603 if (dev->driver->unload)
604 dev->driver->unload(dev);
605
606 if (dev->driver->bus->agp_destroy)
607 dev->driver->bus->agp_destroy(dev);
608
609 drm_vblank_cleanup(dev);
610
611 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
612 drm_rmmap(dev, r_list->map);
613
David Herrmann8f6599d2013-10-20 18:55:45 +0200614 drm_unplug_minor(dev->control);
615 drm_unplug_minor(dev->render);
616 drm_unplug_minor(dev->primary);
David Herrmannc3a49732013-10-02 11:23:38 +0200617
618 list_del(&dev->driver_item);
619}
620EXPORT_SYMBOL(drm_dev_unregister);