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1/**
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>
36#include <linux/slab.h>
37#include "drmP.h"
38#include "drm_core.h"
39
40unsigned int drm_debug = 0; /* 1 to enable debug output */
41EXPORT_SYMBOL(drm_debug);
42
43unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
44EXPORT_SYMBOL(drm_vblank_offdelay);
45
46unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
47EXPORT_SYMBOL(drm_timestamp_precision);
48
49MODULE_AUTHOR(CORE_AUTHOR);
50MODULE_DESCRIPTION(CORE_DESC);
51MODULE_LICENSE("GPL and additional rights");
52MODULE_PARM_DESC(debug, "Enable debug output");
53MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
54MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
55
56module_param_named(debug, drm_debug, int, 0600);
57module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
58module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
59
60struct idr drm_minors_idr;
61
62struct class *drm_class;
63struct proc_dir_entry *drm_proc_root;
64struct dentry *drm_debugfs_root;
65
66int drm_err(const char *func, const char *format, ...)
67{
68 struct va_format vaf;
69 va_list args;
70 int r;
71
72 va_start(args, format);
73
74 vaf.fmt = format;
75 vaf.va = &args;
76
77 r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
78
79 va_end(args);
80
81 return r;
82}
83EXPORT_SYMBOL(drm_err);
84
85void drm_ut_debug_printk(unsigned int request_level,
86 const char *prefix,
87 const char *function_name,
88 const char *format, ...)
89{
90 va_list args;
91
92 if (drm_debug & request_level) {
93 if (function_name)
94 printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
95 va_start(args, format);
96 vprintk(format, args);
97 va_end(args);
98 }
99}
100EXPORT_SYMBOL(drm_ut_debug_printk);
101
102static int drm_minor_get_id(struct drm_device *dev, int type)
103{
104 int new_id;
105 int ret;
106 int base = 0, limit = 63;
107
108 if (type == DRM_MINOR_CONTROL) {
109 base += 64;
110 limit = base + 127;
111 } else if (type == DRM_MINOR_RENDER) {
112 base += 128;
113 limit = base + 255;
114 }
115
116again:
117 if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
118 DRM_ERROR("Out of memory expanding drawable idr\n");
119 return -ENOMEM;
120 }
121 mutex_lock(&dev->struct_mutex);
122 ret = idr_get_new_above(&drm_minors_idr, NULL,
123 base, &new_id);
124 mutex_unlock(&dev->struct_mutex);
125 if (ret == -EAGAIN) {
126 goto again;
127 } else if (ret) {
128 return ret;
129 }
130
131 if (new_id >= limit) {
132 idr_remove(&drm_minors_idr, new_id);
133 return -EINVAL;
134 }
135 return new_id;
136}
137
138struct drm_master *drm_master_create(struct drm_minor *minor)
139{
140 struct drm_master *master;
141
142 master = kzalloc(sizeof(*master), GFP_KERNEL);
143 if (!master)
144 return NULL;
145
146 kref_init(&master->refcount);
147 spin_lock_init(&master->lock.spinlock);
148 init_waitqueue_head(&master->lock.lock_queue);
149 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
150 INIT_LIST_HEAD(&master->magicfree);
151 master->minor = minor;
152
153 list_add_tail(&master->head, &minor->master_list);
154
155 return master;
156}
157
158struct drm_master *drm_master_get(struct drm_master *master)
159{
160 kref_get(&master->refcount);
161 return master;
162}
163EXPORT_SYMBOL(drm_master_get);
164
165static void drm_master_destroy(struct kref *kref)
166{
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;
171
172 list_del(&master->head);
173
174 if (dev->driver->master_destroy)
175 dev->driver->master_destroy(dev, master);
176
177 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
178 if (r_list->master == master) {
179 drm_rmmap_locked(dev, r_list->map);
180 r_list = NULL;
181 }
182 }
183
184 if (master->unique) {
185 kfree(master->unique);
186 master->unique = NULL;
187 master->unique_len = 0;
188 }
189
190 kfree(dev->devname);
191 dev->devname = NULL;
192
193 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
194 list_del(&pt->head);
195 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
196 kfree(pt);
197 }
198
199 drm_ht_remove(&master->magiclist);
200
201 kfree(master);
202}
203
204void drm_master_put(struct drm_master **master)
205{
206 kref_put(&(*master)->refcount, drm_master_destroy);
207 *master = NULL;
208}
209EXPORT_SYMBOL(drm_master_put);
210
211int drm_setmaster_ioctl(struct drm_device *dev, void *data,
212 struct drm_file *file_priv)
213{
214 int ret = 0;
215
216 if (file_priv->is_master)
217 return 0;
218
219 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
220 return -EINVAL;
221
222 if (!file_priv->master)
223 return -EINVAL;
224
225 if (!file_priv->minor->master &&
226 file_priv->minor->master != file_priv->master) {
227 mutex_lock(&dev->struct_mutex);
228 file_priv->minor->master = drm_master_get(file_priv->master);
229 file_priv->is_master = 1;
230 if (dev->driver->master_set) {
231 ret = dev->driver->master_set(dev, file_priv, false);
232 if (unlikely(ret != 0)) {
233 file_priv->is_master = 0;
234 drm_master_put(&file_priv->minor->master);
235 }
236 }
237 mutex_unlock(&dev->struct_mutex);
238 }
239
240 return 0;
241}
242
243int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
244 struct drm_file *file_priv)
245{
246 if (!file_priv->is_master)
247 return -EINVAL;
248
249 if (!file_priv->minor->master)
250 return -EINVAL;
251
252 mutex_lock(&dev->struct_mutex);
253 if (dev->driver->master_drop)
254 dev->driver->master_drop(dev, file_priv, false);
255 drm_master_put(&file_priv->minor->master);
256 file_priv->is_master = 0;
257 mutex_unlock(&dev->struct_mutex);
258 return 0;
259}
260
261int drm_fill_in_dev(struct drm_device *dev,
262 const struct pci_device_id *ent,
263 struct drm_driver *driver)
264{
265 int retcode;
266
267 INIT_LIST_HEAD(&dev->filelist);
268 INIT_LIST_HEAD(&dev->ctxlist);
269 INIT_LIST_HEAD(&dev->vmalist);
270 INIT_LIST_HEAD(&dev->maplist);
271 INIT_LIST_HEAD(&dev->vblank_event_list);
272
273 spin_lock_init(&dev->count_lock);
274 spin_lock_init(&dev->event_lock);
275 mutex_init(&dev->struct_mutex);
276 mutex_init(&dev->ctxlist_mutex);
277
278 if (drm_ht_create(&dev->map_hash, 12)) {
279 return -ENOMEM;
280 }
281
282 /* the DRM has 6 basic counters */
283 dev->counters = 6;
284 dev->types[0] = _DRM_STAT_LOCK;
285 dev->types[1] = _DRM_STAT_OPENS;
286 dev->types[2] = _DRM_STAT_CLOSES;
287 dev->types[3] = _DRM_STAT_IOCTLS;
288 dev->types[4] = _DRM_STAT_LOCKS;
289 dev->types[5] = _DRM_STAT_UNLOCKS;
290
291 dev->driver = driver;
292
293 if (dev->driver->bus->agp_init) {
294 retcode = dev->driver->bus->agp_init(dev);
295 if (retcode)
296 goto error_out_unreg;
297 }
298
299
300
301 retcode = drm_ctxbitmap_init(dev);
302 if (retcode) {
303 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
304 goto error_out_unreg;
305 }
306
307 if (driver->driver_features & DRIVER_GEM) {
308 retcode = drm_gem_init(dev);
309 if (retcode) {
310 DRM_ERROR("Cannot initialize graphics execution "
311 "manager (GEM)\n");
312 goto error_out_unreg;
313 }
314 }
315
316 return 0;
317
318 error_out_unreg:
319 drm_lastclose(dev);
320 return retcode;
321}
322
323
324/**
325 * Get a secondary minor number.
326 *
327 * \param dev device data structure
328 * \param sec-minor structure to hold the assigned minor
329 * \return negative number on failure.
330 *
331 * Search an empty entry and initialize it to the given parameters, and
332 * create the proc init entry via proc_init(). This routines assigns
333 * minor numbers to secondary heads of multi-headed cards
334 */
335int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
336{
337 struct drm_minor *new_minor;
338 int ret;
339 int minor_id;
340
341 DRM_DEBUG("\n");
342
343 minor_id = drm_minor_get_id(dev, type);
344 if (minor_id < 0)
345 return minor_id;
346
347 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
348 if (!new_minor) {
349 ret = -ENOMEM;
350 goto err_idr;
351 }
352
353 new_minor->type = type;
354 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
355 new_minor->dev = dev;
356 new_minor->index = minor_id;
357 INIT_LIST_HEAD(&new_minor->master_list);
358
359 idr_replace(&drm_minors_idr, new_minor, minor_id);
360
361 if (type == DRM_MINOR_LEGACY) {
362 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
363 if (ret) {
364 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
365 goto err_mem;
366 }
367 } else
368 new_minor->proc_root = NULL;
369
370#if defined(CONFIG_DEBUG_FS)
371 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
372 if (ret) {
373 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
374 goto err_g2;
375 }
376#endif
377
378 ret = drm_sysfs_device_add(new_minor);
379 if (ret) {
380 printk(KERN_ERR
381 "DRM: Error sysfs_device_add.\n");
382 goto err_g2;
383 }
384 *minor = new_minor;
385
386 DRM_DEBUG("new minor assigned %d\n", minor_id);
387 return 0;
388
389
390err_g2:
391 if (new_minor->type == DRM_MINOR_LEGACY)
392 drm_proc_cleanup(new_minor, drm_proc_root);
393err_mem:
394 kfree(new_minor);
395err_idr:
396 idr_remove(&drm_minors_idr, minor_id);
397 *minor = NULL;
398 return ret;
399}
400
401/**
402 * Put a secondary minor number.
403 *
404 * \param sec_minor - structure to be released
405 * \return always zero
406 *
407 * Cleans up the proc resources. Not legal for this to be the
408 * last minor released.
409 *
410 */
411int drm_put_minor(struct drm_minor **minor_p)
412{
413 struct drm_minor *minor = *minor_p;
414
415 DRM_DEBUG("release secondary minor %d\n", minor->index);
416
417 if (minor->type == DRM_MINOR_LEGACY)
418 drm_proc_cleanup(minor, drm_proc_root);
419#if defined(CONFIG_DEBUG_FS)
420 drm_debugfs_cleanup(minor);
421#endif
422
423 drm_sysfs_device_remove(minor);
424
425 idr_remove(&drm_minors_idr, minor->index);
426
427 kfree(minor);
428 *minor_p = NULL;
429 return 0;
430}
431
432/**
433 * Called via drm_exit() at module unload time or when pci device is
434 * unplugged.
435 *
436 * Cleans up all DRM device, calling drm_lastclose().
437 *
438 */
439void drm_put_dev(struct drm_device *dev)
440{
441 struct drm_driver *driver;
442 struct drm_map_list *r_list, *list_temp;
443
444 DRM_DEBUG("\n");
445
446 if (!dev) {
447 DRM_ERROR("cleanup called no dev\n");
448 return;
449 }
450 driver = dev->driver;
451
452 drm_lastclose(dev);
453
454 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
455 dev->agp && dev->agp->agp_mtrr >= 0) {
456 int retval;
457 retval = mtrr_del(dev->agp->agp_mtrr,
458 dev->agp->agp_info.aper_base,
459 dev->agp->agp_info.aper_size * 1024 * 1024);
460 DRM_DEBUG("mtrr_del=%d\n", retval);
461 }
462
463 if (dev->driver->unload)
464 dev->driver->unload(dev);
465
466 if (drm_core_has_AGP(dev) && dev->agp) {
467 kfree(dev->agp);
468 dev->agp = NULL;
469 }
470
471 drm_vblank_cleanup(dev);
472
473 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
474 drm_rmmap(dev, r_list->map);
475 drm_ht_remove(&dev->map_hash);
476
477 drm_ctxbitmap_cleanup(dev);
478
479 if (drm_core_check_feature(dev, DRIVER_MODESET))
480 drm_put_minor(&dev->control);
481
482 if (driver->driver_features & DRIVER_GEM)
483 drm_gem_destroy(dev);
484
485 drm_put_minor(&dev->primary);
486
487 list_del(&dev->driver_item);
488 if (dev->devname) {
489 kfree(dev->devname);
490 dev->devname = NULL;
491 }
492 kfree(dev);
493}
494EXPORT_SYMBOL(drm_put_dev);
1/**
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/fs.h>
35#include <linux/module.h>
36#include <linux/moduleparam.h>
37#include <linux/mount.h>
38#include <linux/slab.h>
39#include <drm/drmP.h>
40#include <drm/drm_core.h>
41
42unsigned int drm_debug = 0; /* 1 to enable debug output */
43EXPORT_SYMBOL(drm_debug);
44
45unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */
46EXPORT_SYMBOL(drm_rnodes);
47
48/* 1 to allow user space to request universal planes (experimental) */
49unsigned int drm_universal_planes = 0;
50EXPORT_SYMBOL(drm_universal_planes);
51
52unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
53EXPORT_SYMBOL(drm_vblank_offdelay);
54
55unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
56EXPORT_SYMBOL(drm_timestamp_precision);
57
58/*
59 * Default to use monotonic timestamps for wait-for-vblank and page-flip
60 * complete events.
61 */
62unsigned int drm_timestamp_monotonic = 1;
63
64MODULE_AUTHOR(CORE_AUTHOR);
65MODULE_DESCRIPTION(CORE_DESC);
66MODULE_LICENSE("GPL and additional rights");
67MODULE_PARM_DESC(debug, "Enable debug output");
68MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API");
69MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
70MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
71MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
72
73module_param_named(debug, drm_debug, int, 0600);
74module_param_named(rnodes, drm_rnodes, int, 0600);
75module_param_named(universal_planes, drm_universal_planes, int, 0600);
76module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
77module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
78module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
79
80static DEFINE_SPINLOCK(drm_minor_lock);
81struct idr drm_minors_idr;
82
83struct class *drm_class;
84struct dentry *drm_debugfs_root;
85
86int drm_err(const char *func, const char *format, ...)
87{
88 struct va_format vaf;
89 va_list args;
90 int r;
91
92 va_start(args, format);
93
94 vaf.fmt = format;
95 vaf.va = &args;
96
97 r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
98
99 va_end(args);
100
101 return r;
102}
103EXPORT_SYMBOL(drm_err);
104
105void drm_ut_debug_printk(const char *function_name, const char *format, ...)
106{
107 struct va_format vaf;
108 va_list args;
109
110 va_start(args, format);
111 vaf.fmt = format;
112 vaf.va = &args;
113
114 printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf);
115
116 va_end(args);
117}
118EXPORT_SYMBOL(drm_ut_debug_printk);
119
120struct drm_master *drm_master_create(struct drm_minor *minor)
121{
122 struct drm_master *master;
123
124 master = kzalloc(sizeof(*master), GFP_KERNEL);
125 if (!master)
126 return NULL;
127
128 kref_init(&master->refcount);
129 spin_lock_init(&master->lock.spinlock);
130 init_waitqueue_head(&master->lock.lock_queue);
131 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
132 INIT_LIST_HEAD(&master->magicfree);
133 master->minor = minor;
134
135 return master;
136}
137
138struct drm_master *drm_master_get(struct drm_master *master)
139{
140 kref_get(&master->refcount);
141 return master;
142}
143EXPORT_SYMBOL(drm_master_get);
144
145static void drm_master_destroy(struct kref *kref)
146{
147 struct drm_master *master = container_of(kref, struct drm_master, refcount);
148 struct drm_magic_entry *pt, *next;
149 struct drm_device *dev = master->minor->dev;
150 struct drm_map_list *r_list, *list_temp;
151
152 mutex_lock(&dev->struct_mutex);
153 if (dev->driver->master_destroy)
154 dev->driver->master_destroy(dev, master);
155
156 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
157 if (r_list->master == master) {
158 drm_rmmap_locked(dev, r_list->map);
159 r_list = NULL;
160 }
161 }
162
163 if (master->unique) {
164 kfree(master->unique);
165 master->unique = NULL;
166 master->unique_len = 0;
167 }
168
169 kfree(dev->devname);
170 dev->devname = NULL;
171
172 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
173 list_del(&pt->head);
174 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
175 kfree(pt);
176 }
177
178 drm_ht_remove(&master->magiclist);
179
180 mutex_unlock(&dev->struct_mutex);
181 kfree(master);
182}
183
184void drm_master_put(struct drm_master **master)
185{
186 kref_put(&(*master)->refcount, drm_master_destroy);
187 *master = NULL;
188}
189EXPORT_SYMBOL(drm_master_put);
190
191int drm_setmaster_ioctl(struct drm_device *dev, void *data,
192 struct drm_file *file_priv)
193{
194 int ret = 0;
195
196 mutex_lock(&dev->master_mutex);
197 if (file_priv->is_master)
198 goto out_unlock;
199
200 if (file_priv->minor->master) {
201 ret = -EINVAL;
202 goto out_unlock;
203 }
204
205 if (!file_priv->master) {
206 ret = -EINVAL;
207 goto out_unlock;
208 }
209
210 file_priv->minor->master = drm_master_get(file_priv->master);
211 file_priv->is_master = 1;
212 if (dev->driver->master_set) {
213 ret = dev->driver->master_set(dev, file_priv, false);
214 if (unlikely(ret != 0)) {
215 file_priv->is_master = 0;
216 drm_master_put(&file_priv->minor->master);
217 }
218 }
219
220out_unlock:
221 mutex_unlock(&dev->master_mutex);
222 return ret;
223}
224
225int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
226 struct drm_file *file_priv)
227{
228 int ret = -EINVAL;
229
230 mutex_lock(&dev->master_mutex);
231 if (!file_priv->is_master)
232 goto out_unlock;
233
234 if (!file_priv->minor->master)
235 goto out_unlock;
236
237 ret = 0;
238 if (dev->driver->master_drop)
239 dev->driver->master_drop(dev, file_priv, false);
240 drm_master_put(&file_priv->minor->master);
241 file_priv->is_master = 0;
242
243out_unlock:
244 mutex_unlock(&dev->master_mutex);
245 return ret;
246}
247
248/*
249 * DRM Minors
250 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each
251 * of them is represented by a drm_minor object. Depending on the capabilities
252 * of the device-driver, different interfaces are registered.
253 *
254 * Minors can be accessed via dev->$minor_name. This pointer is either
255 * NULL or a valid drm_minor pointer and stays valid as long as the device is
256 * valid. This means, DRM minors have the same life-time as the underlying
257 * device. However, this doesn't mean that the minor is active. Minors are
258 * registered and unregistered dynamically according to device-state.
259 */
260
261static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
262 unsigned int type)
263{
264 switch (type) {
265 case DRM_MINOR_LEGACY:
266 return &dev->primary;
267 case DRM_MINOR_RENDER:
268 return &dev->render;
269 case DRM_MINOR_CONTROL:
270 return &dev->control;
271 default:
272 return NULL;
273 }
274}
275
276static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
277{
278 struct drm_minor *minor;
279
280 minor = kzalloc(sizeof(*minor), GFP_KERNEL);
281 if (!minor)
282 return -ENOMEM;
283
284 minor->type = type;
285 minor->dev = dev;
286
287 *drm_minor_get_slot(dev, type) = minor;
288 return 0;
289}
290
291static void drm_minor_free(struct drm_device *dev, unsigned int type)
292{
293 struct drm_minor **slot;
294
295 slot = drm_minor_get_slot(dev, type);
296 if (*slot) {
297 kfree(*slot);
298 *slot = NULL;
299 }
300}
301
302static int drm_minor_register(struct drm_device *dev, unsigned int type)
303{
304 struct drm_minor *new_minor;
305 unsigned long flags;
306 int ret;
307 int minor_id;
308
309 DRM_DEBUG("\n");
310
311 new_minor = *drm_minor_get_slot(dev, type);
312 if (!new_minor)
313 return 0;
314
315 idr_preload(GFP_KERNEL);
316 spin_lock_irqsave(&drm_minor_lock, flags);
317 minor_id = idr_alloc(&drm_minors_idr,
318 NULL,
319 64 * type,
320 64 * (type + 1),
321 GFP_NOWAIT);
322 spin_unlock_irqrestore(&drm_minor_lock, flags);
323 idr_preload_end();
324
325 if (minor_id < 0)
326 return minor_id;
327
328 new_minor->index = minor_id;
329
330 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
331 if (ret) {
332 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
333 goto err_id;
334 }
335
336 ret = drm_sysfs_device_add(new_minor);
337 if (ret) {
338 DRM_ERROR("DRM: Error sysfs_device_add.\n");
339 goto err_debugfs;
340 }
341
342 /* replace NULL with @minor so lookups will succeed from now on */
343 spin_lock_irqsave(&drm_minor_lock, flags);
344 idr_replace(&drm_minors_idr, new_minor, new_minor->index);
345 spin_unlock_irqrestore(&drm_minor_lock, flags);
346
347 DRM_DEBUG("new minor assigned %d\n", minor_id);
348 return 0;
349
350err_debugfs:
351 drm_debugfs_cleanup(new_minor);
352err_id:
353 spin_lock_irqsave(&drm_minor_lock, flags);
354 idr_remove(&drm_minors_idr, minor_id);
355 spin_unlock_irqrestore(&drm_minor_lock, flags);
356 new_minor->index = 0;
357 return ret;
358}
359
360static void drm_minor_unregister(struct drm_device *dev, unsigned int type)
361{
362 struct drm_minor *minor;
363 unsigned long flags;
364
365 minor = *drm_minor_get_slot(dev, type);
366 if (!minor || !minor->kdev)
367 return;
368
369 spin_lock_irqsave(&drm_minor_lock, flags);
370 idr_remove(&drm_minors_idr, minor->index);
371 spin_unlock_irqrestore(&drm_minor_lock, flags);
372 minor->index = 0;
373
374 drm_debugfs_cleanup(minor);
375 drm_sysfs_device_remove(minor);
376}
377
378/**
379 * drm_minor_acquire - Acquire a DRM minor
380 * @minor_id: Minor ID of the DRM-minor
381 *
382 * Looks up the given minor-ID and returns the respective DRM-minor object. The
383 * refence-count of the underlying device is increased so you must release this
384 * object with drm_minor_release().
385 *
386 * As long as you hold this minor, it is guaranteed that the object and the
387 * minor->dev pointer will stay valid! However, the device may get unplugged and
388 * unregistered while you hold the minor.
389 *
390 * Returns:
391 * Pointer to minor-object with increased device-refcount, or PTR_ERR on
392 * failure.
393 */
394struct drm_minor *drm_minor_acquire(unsigned int minor_id)
395{
396 struct drm_minor *minor;
397 unsigned long flags;
398
399 spin_lock_irqsave(&drm_minor_lock, flags);
400 minor = idr_find(&drm_minors_idr, minor_id);
401 if (minor)
402 drm_dev_ref(minor->dev);
403 spin_unlock_irqrestore(&drm_minor_lock, flags);
404
405 if (!minor) {
406 return ERR_PTR(-ENODEV);
407 } else if (drm_device_is_unplugged(minor->dev)) {
408 drm_dev_unref(minor->dev);
409 return ERR_PTR(-ENODEV);
410 }
411
412 return minor;
413}
414
415/**
416 * drm_minor_release - Release DRM minor
417 * @minor: Pointer to DRM minor object
418 *
419 * Release a minor that was previously acquired via drm_minor_acquire().
420 */
421void drm_minor_release(struct drm_minor *minor)
422{
423 drm_dev_unref(minor->dev);
424}
425
426/**
427 * Called via drm_exit() at module unload time or when pci device is
428 * unplugged.
429 *
430 * Cleans up all DRM device, calling drm_lastclose().
431 *
432 */
433void drm_put_dev(struct drm_device *dev)
434{
435 DRM_DEBUG("\n");
436
437 if (!dev) {
438 DRM_ERROR("cleanup called no dev\n");
439 return;
440 }
441
442 drm_dev_unregister(dev);
443 drm_dev_unref(dev);
444}
445EXPORT_SYMBOL(drm_put_dev);
446
447void drm_unplug_dev(struct drm_device *dev)
448{
449 /* for a USB device */
450 drm_minor_unregister(dev, DRM_MINOR_LEGACY);
451 drm_minor_unregister(dev, DRM_MINOR_RENDER);
452 drm_minor_unregister(dev, DRM_MINOR_CONTROL);
453
454 mutex_lock(&drm_global_mutex);
455
456 drm_device_set_unplugged(dev);
457
458 if (dev->open_count == 0) {
459 drm_put_dev(dev);
460 }
461 mutex_unlock(&drm_global_mutex);
462}
463EXPORT_SYMBOL(drm_unplug_dev);
464
465/*
466 * DRM internal mount
467 * We want to be able to allocate our own "struct address_space" to control
468 * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow
469 * stand-alone address_space objects, so we need an underlying inode. As there
470 * is no way to allocate an independent inode easily, we need a fake internal
471 * VFS mount-point.
472 *
473 * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free()
474 * frees it again. You are allowed to use iget() and iput() to get references to
475 * the inode. But each drm_fs_inode_new() call must be paired with exactly one
476 * drm_fs_inode_free() call (which does not have to be the last iput()).
477 * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it
478 * between multiple inode-users. You could, technically, call
479 * iget() + drm_fs_inode_free() directly after alloc and sometime later do an
480 * iput(), but this way you'd end up with a new vfsmount for each inode.
481 */
482
483static int drm_fs_cnt;
484static struct vfsmount *drm_fs_mnt;
485
486static const struct dentry_operations drm_fs_dops = {
487 .d_dname = simple_dname,
488};
489
490static const struct super_operations drm_fs_sops = {
491 .statfs = simple_statfs,
492};
493
494static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags,
495 const char *dev_name, void *data)
496{
497 return mount_pseudo(fs_type,
498 "drm:",
499 &drm_fs_sops,
500 &drm_fs_dops,
501 0x010203ff);
502}
503
504static struct file_system_type drm_fs_type = {
505 .name = "drm",
506 .owner = THIS_MODULE,
507 .mount = drm_fs_mount,
508 .kill_sb = kill_anon_super,
509};
510
511static struct inode *drm_fs_inode_new(void)
512{
513 struct inode *inode;
514 int r;
515
516 r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt);
517 if (r < 0) {
518 DRM_ERROR("Cannot mount pseudo fs: %d\n", r);
519 return ERR_PTR(r);
520 }
521
522 inode = alloc_anon_inode(drm_fs_mnt->mnt_sb);
523 if (IS_ERR(inode))
524 simple_release_fs(&drm_fs_mnt, &drm_fs_cnt);
525
526 return inode;
527}
528
529static void drm_fs_inode_free(struct inode *inode)
530{
531 if (inode) {
532 iput(inode);
533 simple_release_fs(&drm_fs_mnt, &drm_fs_cnt);
534 }
535}
536
537/**
538 * drm_dev_alloc - Allocate new drm device
539 * @driver: DRM driver to allocate device for
540 * @parent: Parent device object
541 *
542 * Allocate and initialize a new DRM device. No device registration is done.
543 * Call drm_dev_register() to advertice the device to user space and register it
544 * with other core subsystems.
545 *
546 * The initial ref-count of the object is 1. Use drm_dev_ref() and
547 * drm_dev_unref() to take and drop further ref-counts.
548 *
549 * RETURNS:
550 * Pointer to new DRM device, or NULL if out of memory.
551 */
552struct drm_device *drm_dev_alloc(struct drm_driver *driver,
553 struct device *parent)
554{
555 struct drm_device *dev;
556 int ret;
557
558 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
559 if (!dev)
560 return NULL;
561
562 kref_init(&dev->ref);
563 dev->dev = parent;
564 dev->driver = driver;
565
566 INIT_LIST_HEAD(&dev->filelist);
567 INIT_LIST_HEAD(&dev->ctxlist);
568 INIT_LIST_HEAD(&dev->vmalist);
569 INIT_LIST_HEAD(&dev->maplist);
570 INIT_LIST_HEAD(&dev->vblank_event_list);
571
572 spin_lock_init(&dev->count_lock);
573 spin_lock_init(&dev->event_lock);
574 mutex_init(&dev->struct_mutex);
575 mutex_init(&dev->ctxlist_mutex);
576 mutex_init(&dev->master_mutex);
577
578 dev->anon_inode = drm_fs_inode_new();
579 if (IS_ERR(dev->anon_inode)) {
580 ret = PTR_ERR(dev->anon_inode);
581 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret);
582 goto err_free;
583 }
584
585 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
586 ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
587 if (ret)
588 goto err_minors;
589 }
590
591 if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
592 ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
593 if (ret)
594 goto err_minors;
595 }
596
597 ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY);
598 if (ret)
599 goto err_minors;
600
601 if (drm_ht_create(&dev->map_hash, 12))
602 goto err_minors;
603
604 ret = drm_ctxbitmap_init(dev);
605 if (ret) {
606 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
607 goto err_ht;
608 }
609
610 if (driver->driver_features & DRIVER_GEM) {
611 ret = drm_gem_init(dev);
612 if (ret) {
613 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
614 goto err_ctxbitmap;
615 }
616 }
617
618 return dev;
619
620err_ctxbitmap:
621 drm_ctxbitmap_cleanup(dev);
622err_ht:
623 drm_ht_remove(&dev->map_hash);
624err_minors:
625 drm_minor_free(dev, DRM_MINOR_LEGACY);
626 drm_minor_free(dev, DRM_MINOR_RENDER);
627 drm_minor_free(dev, DRM_MINOR_CONTROL);
628 drm_fs_inode_free(dev->anon_inode);
629err_free:
630 mutex_destroy(&dev->master_mutex);
631 kfree(dev);
632 return NULL;
633}
634EXPORT_SYMBOL(drm_dev_alloc);
635
636static void drm_dev_release(struct kref *ref)
637{
638 struct drm_device *dev = container_of(ref, struct drm_device, ref);
639
640 if (dev->driver->driver_features & DRIVER_GEM)
641 drm_gem_destroy(dev);
642
643 drm_ctxbitmap_cleanup(dev);
644 drm_ht_remove(&dev->map_hash);
645 drm_fs_inode_free(dev->anon_inode);
646
647 drm_minor_free(dev, DRM_MINOR_LEGACY);
648 drm_minor_free(dev, DRM_MINOR_RENDER);
649 drm_minor_free(dev, DRM_MINOR_CONTROL);
650
651 kfree(dev->devname);
652
653 mutex_destroy(&dev->master_mutex);
654 kfree(dev);
655}
656
657/**
658 * drm_dev_ref - Take reference of a DRM device
659 * @dev: device to take reference of or NULL
660 *
661 * This increases the ref-count of @dev by one. You *must* already own a
662 * reference when calling this. Use drm_dev_unref() to drop this reference
663 * again.
664 *
665 * This function never fails. However, this function does not provide *any*
666 * guarantee whether the device is alive or running. It only provides a
667 * reference to the object and the memory associated with it.
668 */
669void drm_dev_ref(struct drm_device *dev)
670{
671 if (dev)
672 kref_get(&dev->ref);
673}
674EXPORT_SYMBOL(drm_dev_ref);
675
676/**
677 * drm_dev_unref - Drop reference of a DRM device
678 * @dev: device to drop reference of or NULL
679 *
680 * This decreases the ref-count of @dev by one. The device is destroyed if the
681 * ref-count drops to zero.
682 */
683void drm_dev_unref(struct drm_device *dev)
684{
685 if (dev)
686 kref_put(&dev->ref, drm_dev_release);
687}
688EXPORT_SYMBOL(drm_dev_unref);
689
690/**
691 * drm_dev_register - Register DRM device
692 * @dev: Device to register
693 *
694 * Register the DRM device @dev with the system, advertise device to user-space
695 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
696 * previously.
697 *
698 * Never call this twice on any device!
699 *
700 * RETURNS:
701 * 0 on success, negative error code on failure.
702 */
703int drm_dev_register(struct drm_device *dev, unsigned long flags)
704{
705 int ret;
706
707 mutex_lock(&drm_global_mutex);
708
709 ret = drm_minor_register(dev, DRM_MINOR_CONTROL);
710 if (ret)
711 goto err_minors;
712
713 ret = drm_minor_register(dev, DRM_MINOR_RENDER);
714 if (ret)
715 goto err_minors;
716
717 ret = drm_minor_register(dev, DRM_MINOR_LEGACY);
718 if (ret)
719 goto err_minors;
720
721 if (dev->driver->load) {
722 ret = dev->driver->load(dev, flags);
723 if (ret)
724 goto err_minors;
725 }
726
727 /* setup grouping for legacy outputs */
728 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
729 ret = drm_mode_group_init_legacy_group(dev,
730 &dev->primary->mode_group);
731 if (ret)
732 goto err_unload;
733 }
734
735 ret = 0;
736 goto out_unlock;
737
738err_unload:
739 if (dev->driver->unload)
740 dev->driver->unload(dev);
741err_minors:
742 drm_minor_unregister(dev, DRM_MINOR_LEGACY);
743 drm_minor_unregister(dev, DRM_MINOR_RENDER);
744 drm_minor_unregister(dev, DRM_MINOR_CONTROL);
745out_unlock:
746 mutex_unlock(&drm_global_mutex);
747 return ret;
748}
749EXPORT_SYMBOL(drm_dev_register);
750
751/**
752 * drm_dev_unregister - Unregister DRM device
753 * @dev: Device to unregister
754 *
755 * Unregister the DRM device from the system. This does the reverse of
756 * drm_dev_register() but does not deallocate the device. The caller must call
757 * drm_dev_unref() to drop their final reference.
758 */
759void drm_dev_unregister(struct drm_device *dev)
760{
761 struct drm_map_list *r_list, *list_temp;
762
763 drm_lastclose(dev);
764
765 if (dev->driver->unload)
766 dev->driver->unload(dev);
767
768 if (dev->agp)
769 drm_pci_agp_destroy(dev);
770
771 drm_vblank_cleanup(dev);
772
773 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
774 drm_rmmap(dev, r_list->map);
775
776 drm_minor_unregister(dev, DRM_MINOR_LEGACY);
777 drm_minor_unregister(dev, DRM_MINOR_RENDER);
778 drm_minor_unregister(dev, DRM_MINOR_CONTROL);
779}
780EXPORT_SYMBOL(drm_dev_unregister);