blob: 432994aafc3b9b525e989d402de84d9a344e52f5 [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{
102 va_list args;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
yakui_zhao4fefcb22009-06-02 14:09:47 +0800104 if (drm_debug & request_level) {
105 if (function_name)
106 printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
107 va_start(args, format);
108 vprintk(format, args);
109 va_end(args);
110 }
111}
112EXPORT_SYMBOL(drm_ut_debug_printk);
Joe Perches5ad3d882011-04-17 20:35:51 -0700113
Dave Airlie2c14f282008-04-21 16:47:32 +1000114static int drm_minor_get_id(struct drm_device *dev, int type)
115{
Dave Airlie2c14f282008-04-21 16:47:32 +1000116 int ret;
117 int base = 0, limit = 63;
118
Dave Airlief453ba02008-11-07 14:05:41 -0800119 if (type == DRM_MINOR_CONTROL) {
Kristian Høgsberg24f40032013-08-08 19:10:21 +0200120 base += 64;
121 limit = base + 63;
122 } else if (type == DRM_MINOR_RENDER) {
123 base += 128;
124 limit = base + 63;
125 }
Dave Airlief453ba02008-11-07 14:05:41 -0800126
Dave Airlie2c14f282008-04-21 16:47:32 +1000127 mutex_lock(&dev->struct_mutex);
Tejun Heo2e928812013-02-27 17:04:08 -0800128 ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
Dave Airlie2c14f282008-04-21 16:47:32 +1000129 mutex_unlock(&dev->struct_mutex);
Dave Airlie2c14f282008-04-21 16:47:32 +1000130
Tejun Heo2e928812013-02-27 17:04:08 -0800131 return ret == -ENOSPC ? -EINVAL : ret;
Dave Airlie2c14f282008-04-21 16:47:32 +1000132}
133
Dave Airlie7c1c2872008-11-28 14:22:24 +1000134struct drm_master *drm_master_create(struct drm_minor *minor)
135{
136 struct drm_master *master;
137
Eric Anholt9a298b22009-03-24 12:23:04 -0700138 master = kzalloc(sizeof(*master), GFP_KERNEL);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000139 if (!master)
140 return NULL;
141
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;
148
149 list_add_tail(&master->head, &minor->master_list);
150
151 return master;
152}
153
154struct drm_master *drm_master_get(struct drm_master *master)
155{
156 kref_get(&master->refcount);
157 return master;
158}
Thomas Hellstrom85bb0c32009-12-06 21:46:28 +0100159EXPORT_SYMBOL(drm_master_get);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000160
161static void drm_master_destroy(struct kref *kref)
162{
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;
Dave Airliec1ff85d2009-01-19 17:17:58 +1000166 struct drm_map_list *r_list, *list_temp;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000167
168 list_del(&master->head);
169
170 if (dev->driver->master_destroy)
171 dev->driver->master_destroy(dev, master);
172
Dave Airliec1ff85d2009-01-19 17:17:58 +1000173 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);
176 r_list = NULL;
177 }
178 }
179
Dave Airlie7c1c2872008-11-28 14:22:24 +1000180 if (master->unique) {
Eric Anholt9a298b22009-03-24 12:23:04 -0700181 kfree(master->unique);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000182 master->unique = NULL;
183 master->unique_len = 0;
184 }
185
Chris Wilson6e350232010-07-24 18:29:36 +0100186 kfree(dev->devname);
187 dev->devname = NULL;
188
Dave Airlie7c1c2872008-11-28 14:22:24 +1000189 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
190 list_del(&pt->head);
191 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
Eric Anholt9a298b22009-03-24 12:23:04 -0700192 kfree(pt);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000193 }
194
195 drm_ht_remove(&master->magiclist);
196
Eric Anholt9a298b22009-03-24 12:23:04 -0700197 kfree(master);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000198}
199
200void drm_master_put(struct drm_master **master)
201{
202 kref_put(&(*master)->refcount, drm_master_destroy);
203 *master = NULL;
204}
Thomas Hellstrom85bb0c32009-12-06 21:46:28 +0100205EXPORT_SYMBOL(drm_master_put);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000206
207int drm_setmaster_ioctl(struct drm_device *dev, void *data,
208 struct drm_file *file_priv)
209{
Benjamin Gaignard53ef1602013-06-26 17:58:59 +0200210 int ret = 0;
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000211
Jonas Bonn6b008422009-04-16 09:00:02 +0200212 if (file_priv->is_master)
213 return 0;
214
Dave Airlie7c1c2872008-11-28 14:22:24 +1000215 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
216 return -EINVAL;
217
218 if (!file_priv->master)
219 return -EINVAL;
220
David Herrmann08bec5b2012-11-15 13:04:37 +0000221 if (file_priv->minor->master)
222 return -EINVAL;
223
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);
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000232 }
Dave Airlie7c1c2872008-11-28 14:22:24 +1000233 }
David Herrmann08bec5b2012-11-15 13:04:37 +0000234 mutex_unlock(&dev->struct_mutex);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000235
Benjamin Gaignard53ef1602013-06-26 17:58:59 +0200236 return ret;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000237}
238
239int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
240 struct drm_file *file_priv)
241{
Jonas Bonn6b008422009-04-16 09:00:02 +0200242 if (!file_priv->is_master)
Dave Airlie7c1c2872008-11-28 14:22:24 +1000243 return -EINVAL;
Jonas Bonn6b008422009-04-16 09:00:02 +0200244
Dave Airlie07f1c7a2009-04-20 09:32:50 +1000245 if (!file_priv->minor->master)
246 return -EINVAL;
247
Dave Airlie7c1c2872008-11-28 14:22:24 +1000248 mutex_lock(&dev->struct_mutex);
Thomas Hellstrom862302f2009-12-02 18:15:25 +0000249 if (dev->driver->master_drop)
250 dev->driver->master_drop(dev, file_priv, false);
Dave Airlie7c1c2872008-11-28 14:22:24 +1000251 drm_master_put(&file_priv->minor->master);
Jonas Bonn6b008422009-04-16 09:00:02 +0200252 file_priv->is_master = 0;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000253 mutex_unlock(&dev->struct_mutex);
254 return 0;
255}
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257/**
258 * Get a secondary minor number.
259 *
260 * \param dev device data structure
261 * \param sec-minor structure to hold the assigned minor
262 * \return negative number on failure.
263 *
Daniel Vettercb6458f2013-08-08 15:41:34 +0200264 * Search an empty entry and initialize it to the given parameters. This
265 * routines assigns minor numbers to secondary heads of multi-headed cards
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 */
Jordan Crousedcdb1672010-05-27 13:40:25 -0600267int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
Dave Airlie2c14f282008-04-21 16:47:32 +1000269 struct drm_minor *new_minor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 int ret;
Dave Airlie2c14f282008-04-21 16:47:32 +1000271 int minor_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 DRM_DEBUG("\n");
274
Dave Airlie2c14f282008-04-21 16:47:32 +1000275 minor_id = drm_minor_get_id(dev, type);
276 if (minor_id < 0)
277 return minor_id;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000278
Dave Airlie2c14f282008-04-21 16:47:32 +1000279 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
280 if (!new_minor) {
281 ret = -ENOMEM;
282 goto err_idr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 }
Dave Airlie2c14f282008-04-21 16:47:32 +1000284
285 new_minor->type = type;
286 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
287 new_minor->dev = dev;
288 new_minor->index = minor_id;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000289 INIT_LIST_HEAD(&new_minor->master_list);
Dave Airlie2c14f282008-04-21 16:47:32 +1000290
291 idr_replace(&drm_minors_idr, new_minor, minor_id);
292
Ben Gamari955b12d2009-02-17 20:08:49 -0500293#if defined(CONFIG_DEBUG_FS)
294 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
295 if (ret) {
GeunSik Lim156f5a72009-06-02 15:01:37 +0900296 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
Daniel Vettercb6458f2013-08-08 15:41:34 +0200297 goto err_mem;
Ben Gamari955b12d2009-02-17 20:08:49 -0500298 }
299#endif
Dave Airlie2c14f282008-04-21 16:47:32 +1000300
301 ret = drm_sysfs_device_add(new_minor);
302 if (ret) {
303 printk(KERN_ERR
304 "DRM: Error sysfs_device_add.\n");
Daniel Vettercb6458f2013-08-08 15:41:34 +0200305 goto err_debugfs;
Dave Airlie2c14f282008-04-21 16:47:32 +1000306 }
307 *minor = new_minor;
308
309 DRM_DEBUG("new minor assigned %d\n", minor_id);
310 return 0;
311
312
Daniel Vettercb6458f2013-08-08 15:41:34 +0200313err_debugfs:
314#if defined(CONFIG_DEBUG_FS)
315 drm_debugfs_cleanup(new_minor);
Dave Airlie2c14f282008-04-21 16:47:32 +1000316err_mem:
Daniel Vettercb6458f2013-08-08 15:41:34 +0200317#endif
Dave Airlie2c14f282008-04-21 16:47:32 +1000318 kfree(new_minor);
319err_idr:
320 idr_remove(&drm_minors_idr, minor_id);
321 *minor = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return ret;
323}
Dave Airlie9c1dfc52012-03-20 06:59:29 +0000324EXPORT_SYMBOL(drm_get_minor);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000325
Dave Airliec94f7022005-07-07 21:03:38 +1000326/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 * Put a secondary minor number.
328 *
329 * \param sec_minor - structure to be released
330 * \return always zero
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 */
Dave Airlie2c14f282008-04-21 16:47:32 +1000332int drm_put_minor(struct drm_minor **minor_p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
Dave Airlie2c14f282008-04-21 16:47:32 +1000334 struct drm_minor *minor = *minor_p;
Eric Anholt673a3942008-07-30 12:06:12 -0700335
Dave Airlie2c14f282008-04-21 16:47:32 +1000336 DRM_DEBUG("release secondary minor %d\n", minor->index);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000337
Ben Gamari955b12d2009-02-17 20:08:49 -0500338#if defined(CONFIG_DEBUG_FS)
339 drm_debugfs_cleanup(minor);
340#endif
341
Dave Airlie2c14f282008-04-21 16:47:32 +1000342 drm_sysfs_device_remove(minor);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000343
Dave Airlie2c14f282008-04-21 16:47:32 +1000344 idr_remove(&drm_minors_idr, minor->index);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000345
Dave Airlie2c14f282008-04-21 16:47:32 +1000346 kfree(minor);
347 *minor_p = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 return 0;
349}
Dave Airlie9c1dfc52012-03-20 06:59:29 +0000350EXPORT_SYMBOL(drm_put_minor);
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500351
Dave Airlie2c07a212012-02-20 14:18:07 +0000352static void drm_unplug_minor(struct drm_minor *minor)
353{
354 drm_sysfs_device_remove(minor);
355}
356
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500357/**
358 * Called via drm_exit() at module unload time or when pci device is
359 * unplugged.
360 *
361 * Cleans up all DRM device, calling drm_lastclose().
362 *
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500363 */
364void drm_put_dev(struct drm_device *dev)
365{
Julia Lawallecca0682009-07-11 09:50:09 +0200366 struct drm_driver *driver;
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500367 struct drm_map_list *r_list, *list_temp;
368
369 DRM_DEBUG("\n");
370
371 if (!dev) {
372 DRM_ERROR("cleanup called no dev\n");
373 return;
374 }
Julia Lawallecca0682009-07-11 09:50:09 +0200375 driver = dev->driver;
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500376
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500377 drm_lastclose(dev);
378
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500379 if (dev->driver->unload)
380 dev->driver->unload(dev);
381
David Herrmann28ec7112013-07-27 16:37:00 +0200382 if (dev->driver->bus->agp_destroy)
383 dev->driver->bus->agp_destroy(dev);
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500384
Jesse Barnesb78315f2010-03-26 11:07:16 -0700385 drm_vblank_cleanup(dev);
386
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500387 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
388 drm_rmmap(dev, r_list->map);
Ben Skeggs30ddbd92009-03-02 11:13:04 +1000389 drm_ht_remove(&dev->map_hash);
390
Dave Airliec21eb212013-09-20 08:32:59 +1000391 drm_ctxbitmap_cleanup(dev);
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500392
393 if (drm_core_check_feature(dev, DRIVER_MODESET))
394 drm_put_minor(&dev->control);
395
David Herrmann17931262013-08-25 18:29:00 +0200396 if (dev->render)
397 drm_put_minor(&dev->render);
398
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500399 if (driver->driver_features & DRIVER_GEM)
400 drm_gem_destroy(dev);
401
402 drm_put_minor(&dev->primary);
403
Dave Airliea250b9f2010-12-15 07:13:55 +1000404 list_del(&dev->driver_item);
Sachin Kamat66141d32012-11-19 09:44:59 +0000405 kfree(dev->devname);
Eric Anholt9a298b22009-03-24 12:23:04 -0700406 kfree(dev);
Kristian Høgsberg112b7152009-01-04 16:55:33 -0500407}
408EXPORT_SYMBOL(drm_put_dev);
Dave Airlie2c07a212012-02-20 14:18:07 +0000409
410void drm_unplug_dev(struct drm_device *dev)
411{
412 /* for a USB device */
413 if (drm_core_check_feature(dev, DRIVER_MODESET))
414 drm_unplug_minor(dev->control);
David Herrmann17931262013-08-25 18:29:00 +0200415 if (dev->render)
416 drm_unplug_minor(dev->render);
Dave Airlie2c07a212012-02-20 14:18:07 +0000417 drm_unplug_minor(dev->primary);
418
419 mutex_lock(&drm_global_mutex);
420
421 drm_device_set_unplugged(dev);
422
423 if (dev->open_count == 0) {
424 drm_put_dev(dev);
425 }
426 mutex_unlock(&drm_global_mutex);
427}
428EXPORT_SYMBOL(drm_unplug_dev);
David Herrmann1bb72532013-10-02 11:23:34 +0200429
430/**
431 * drm_dev_alloc - Allocate new drm device
432 * @driver: DRM driver to allocate device for
433 * @parent: Parent device object
434 *
435 * Allocate and initialize a new DRM device. No device registration is done.
David Herrmannc22f0ac2013-10-02 11:23:35 +0200436 * Call drm_dev_register() to advertice the device to user space and register it
437 * with other core subsystems.
David Herrmann1bb72532013-10-02 11:23:34 +0200438 *
439 * RETURNS:
440 * Pointer to new DRM device, or NULL if out of memory.
441 */
442struct drm_device *drm_dev_alloc(struct drm_driver *driver,
443 struct device *parent)
444{
445 struct drm_device *dev;
446 int ret;
447
448 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
449 if (!dev)
450 return NULL;
451
452 dev->dev = parent;
453 dev->driver = driver;
454
455 INIT_LIST_HEAD(&dev->filelist);
456 INIT_LIST_HEAD(&dev->ctxlist);
457 INIT_LIST_HEAD(&dev->vmalist);
458 INIT_LIST_HEAD(&dev->maplist);
459 INIT_LIST_HEAD(&dev->vblank_event_list);
460
461 spin_lock_init(&dev->count_lock);
462 spin_lock_init(&dev->event_lock);
463 mutex_init(&dev->struct_mutex);
464 mutex_init(&dev->ctxlist_mutex);
465
466 /* the DRM has 6 basic counters */
467 dev->counters = 6;
468 dev->types[0] = _DRM_STAT_LOCK;
469 dev->types[1] = _DRM_STAT_OPENS;
470 dev->types[2] = _DRM_STAT_CLOSES;
471 dev->types[3] = _DRM_STAT_IOCTLS;
472 dev->types[4] = _DRM_STAT_LOCKS;
473 dev->types[5] = _DRM_STAT_UNLOCKS;
474
475 if (drm_ht_create(&dev->map_hash, 12))
476 goto err_free;
477
478 ret = drm_ctxbitmap_init(dev);
479 if (ret) {
480 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
481 goto err_ht;
482 }
483
484 if (driver->driver_features & DRIVER_GEM) {
485 ret = drm_gem_init(dev);
486 if (ret) {
487 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
488 goto err_ctxbitmap;
489 }
490 }
491
492 return dev;
493
494err_ctxbitmap:
495 drm_ctxbitmap_cleanup(dev);
496err_ht:
497 drm_ht_remove(&dev->map_hash);
498err_free:
499 kfree(dev);
500 return NULL;
501}
502EXPORT_SYMBOL(drm_dev_alloc);
David Herrmannc22f0ac2013-10-02 11:23:35 +0200503
504/**
505 * drm_dev_register - Register DRM device
506 * @dev: Device to register
507 *
508 * Register the DRM device @dev with the system, advertise device to user-space
509 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
510 * previously.
511 *
512 * Never call this twice on any device!
513 *
514 * RETURNS:
515 * 0 on success, negative error code on failure.
516 */
517int drm_dev_register(struct drm_device *dev, unsigned long flags)
518{
519 int ret;
520
521 mutex_lock(&drm_global_mutex);
522
523 if (dev->driver->bus->agp_init) {
524 ret = dev->driver->bus->agp_init(dev);
525 if (ret)
526 goto out_unlock;
527 }
528
529 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
530 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
531 if (ret)
532 goto err_agp;
533 }
534
535 if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
536 ret = drm_get_minor(dev, &dev->render, DRM_MINOR_RENDER);
537 if (ret)
538 goto err_control_node;
539 }
540
541 ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
542 if (ret)
543 goto err_render_node;
544
545 if (dev->driver->load) {
546 ret = dev->driver->load(dev, flags);
547 if (ret)
548 goto err_primary_node;
549 }
550
551 /* setup grouping for legacy outputs */
552 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
553 ret = drm_mode_group_init_legacy_group(dev,
554 &dev->primary->mode_group);
555 if (ret)
556 goto err_unload;
557 }
558
559 list_add_tail(&dev->driver_item, &dev->driver->device_list);
560
561 ret = 0;
562 goto out_unlock;
563
564err_unload:
565 if (dev->driver->unload)
566 dev->driver->unload(dev);
567err_primary_node:
568 drm_put_minor(&dev->primary);
569err_render_node:
570 if (dev->render)
571 drm_put_minor(&dev->render);
572err_control_node:
573 if (dev->control)
574 drm_put_minor(&dev->control);
575err_agp:
576 if (dev->driver->bus->agp_destroy)
577 dev->driver->bus->agp_destroy(dev);
578out_unlock:
579 mutex_unlock(&drm_global_mutex);
580 return ret;
581}
582EXPORT_SYMBOL(drm_dev_register);