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 <drm/drmP.h>
38 #include <drm/drm_core.h>
39
40 unsigned int drm_debug = 0; /* 1 to enable debug output */
41 EXPORT_SYMBOL(drm_debug);
42
43 unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
44 EXPORT_SYMBOL(drm_vblank_offdelay);
45
46 unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */
47 EXPORT_SYMBOL(drm_timestamp_precision);
48
49 /*
50 * Default to use monotonic timestamps for wait-for-vblank and page-flip
51 * complete events.
52 */
53 unsigned int drm_timestamp_monotonic = 1;
54
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");
62
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);
67
68 struct idr drm_minors_idr;
69
70 struct class *drm_class;
71 struct proc_dir_entry *drm_proc_root;
72 struct dentry *drm_debugfs_root;
73
drm_err(const char * func,const char * format,...)74 int drm_err(const char *func, const char *format, ...)
75 {
76 struct va_format vaf;
77 va_list args;
78 int r;
79
80 va_start(args, format);
81
82 vaf.fmt = format;
83 vaf.va = &args;
84
85 r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
86
87 va_end(args);
88
89 return r;
90 }
91 EXPORT_SYMBOL(drm_err);
92
drm_ut_debug_printk(unsigned int request_level,const char * prefix,const char * function_name,const char * format,...)93 void drm_ut_debug_printk(unsigned int request_level,
94 const char *prefix,
95 const char *function_name,
96 const char *format, ...)
97 {
98 va_list args;
99
100 if (drm_debug & request_level) {
101 if (function_name)
102 printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
103 va_start(args, format);
104 vprintk(format, args);
105 va_end(args);
106 }
107 }
108 EXPORT_SYMBOL(drm_ut_debug_printk);
109
drm_minor_get_id(struct drm_device * dev,int type)110 static int drm_minor_get_id(struct drm_device *dev, int type)
111 {
112 int ret;
113 int base = 0, limit = 63;
114
115 if (type == DRM_MINOR_CONTROL) {
116 base += 64;
117 limit = base + 127;
118 } else if (type == DRM_MINOR_RENDER) {
119 base += 128;
120 limit = base + 255;
121 }
122
123 mutex_lock(&dev->struct_mutex);
124 ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
125 mutex_unlock(&dev->struct_mutex);
126
127 return ret == -ENOSPC ? -EINVAL : ret;
128 }
129
drm_master_create(struct drm_minor * minor)130 struct drm_master *drm_master_create(struct drm_minor *minor)
131 {
132 struct drm_master *master;
133
134 master = kzalloc(sizeof(*master), GFP_KERNEL);
135 if (!master)
136 return NULL;
137
138 kref_init(&master->refcount);
139 spin_lock_init(&master->lock.spinlock);
140 init_waitqueue_head(&master->lock.lock_queue);
141 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
142 INIT_LIST_HEAD(&master->magicfree);
143 master->minor = minor;
144
145 list_add_tail(&master->head, &minor->master_list);
146
147 return master;
148 }
149
drm_master_get(struct drm_master * master)150 struct drm_master *drm_master_get(struct drm_master *master)
151 {
152 kref_get(&master->refcount);
153 return master;
154 }
155 EXPORT_SYMBOL(drm_master_get);
156
drm_master_destroy(struct kref * kref)157 static void drm_master_destroy(struct kref *kref)
158 {
159 struct drm_master *master = container_of(kref, struct drm_master, refcount);
160 struct drm_magic_entry *pt, *next;
161 struct drm_device *dev = master->minor->dev;
162 struct drm_map_list *r_list, *list_temp;
163
164 list_del(&master->head);
165
166 if (dev->driver->master_destroy)
167 dev->driver->master_destroy(dev, master);
168
169 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
170 if (r_list->master == master) {
171 drm_rmmap_locked(dev, r_list->map);
172 r_list = NULL;
173 }
174 }
175
176 if (master->unique) {
177 kfree(master->unique);
178 master->unique = NULL;
179 master->unique_len = 0;
180 }
181
182 kfree(dev->devname);
183 dev->devname = NULL;
184
185 list_for_each_entry_safe(pt, next, &master->magicfree, head) {
186 list_del(&pt->head);
187 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
188 kfree(pt);
189 }
190
191 drm_ht_remove(&master->magiclist);
192
193 kfree(master);
194 }
195
drm_master_put(struct drm_master ** master)196 void drm_master_put(struct drm_master **master)
197 {
198 kref_put(&(*master)->refcount, drm_master_destroy);
199 *master = NULL;
200 }
201 EXPORT_SYMBOL(drm_master_put);
202
drm_setmaster_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)203 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
204 struct drm_file *file_priv)
205 {
206 int ret;
207
208 if (file_priv->is_master)
209 return 0;
210
211 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
212 return -EINVAL;
213
214 if (!file_priv->master)
215 return -EINVAL;
216
217 if (file_priv->minor->master)
218 return -EINVAL;
219
220 mutex_lock(&dev->struct_mutex);
221 file_priv->minor->master = drm_master_get(file_priv->master);
222 file_priv->is_master = 1;
223 if (dev->driver->master_set) {
224 ret = dev->driver->master_set(dev, file_priv, false);
225 if (unlikely(ret != 0)) {
226 file_priv->is_master = 0;
227 drm_master_put(&file_priv->minor->master);
228 }
229 }
230 mutex_unlock(&dev->struct_mutex);
231
232 return 0;
233 }
234
drm_dropmaster_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)235 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
236 struct drm_file *file_priv)
237 {
238 if (!file_priv->is_master)
239 return -EINVAL;
240
241 if (!file_priv->minor->master)
242 return -EINVAL;
243
244 mutex_lock(&dev->struct_mutex);
245 if (dev->driver->master_drop)
246 dev->driver->master_drop(dev, file_priv, false);
247 drm_master_put(&file_priv->minor->master);
248 file_priv->is_master = 0;
249 mutex_unlock(&dev->struct_mutex);
250 return 0;
251 }
252
drm_fill_in_dev(struct drm_device * dev,const struct pci_device_id * ent,struct drm_driver * driver)253 int drm_fill_in_dev(struct drm_device *dev,
254 const struct pci_device_id *ent,
255 struct drm_driver *driver)
256 {
257 int retcode;
258
259 INIT_LIST_HEAD(&dev->filelist);
260 INIT_LIST_HEAD(&dev->ctxlist);
261 INIT_LIST_HEAD(&dev->vmalist);
262 INIT_LIST_HEAD(&dev->maplist);
263 INIT_LIST_HEAD(&dev->vblank_event_list);
264
265 spin_lock_init(&dev->count_lock);
266 spin_lock_init(&dev->event_lock);
267 mutex_init(&dev->struct_mutex);
268 mutex_init(&dev->ctxlist_mutex);
269
270 if (drm_ht_create(&dev->map_hash, 12)) {
271 return -ENOMEM;
272 }
273
274 /* the DRM has 6 basic counters */
275 dev->counters = 6;
276 dev->types[0] = _DRM_STAT_LOCK;
277 dev->types[1] = _DRM_STAT_OPENS;
278 dev->types[2] = _DRM_STAT_CLOSES;
279 dev->types[3] = _DRM_STAT_IOCTLS;
280 dev->types[4] = _DRM_STAT_LOCKS;
281 dev->types[5] = _DRM_STAT_UNLOCKS;
282
283 dev->driver = driver;
284
285 if (dev->driver->bus->agp_init) {
286 retcode = dev->driver->bus->agp_init(dev);
287 if (retcode)
288 goto error_out_unreg;
289 }
290
291
292
293 retcode = drm_ctxbitmap_init(dev);
294 if (retcode) {
295 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
296 goto error_out_unreg;
297 }
298
299 if (driver->driver_features & DRIVER_GEM) {
300 retcode = drm_gem_init(dev);
301 if (retcode) {
302 DRM_ERROR("Cannot initialize graphics execution "
303 "manager (GEM)\n");
304 goto error_out_unreg;
305 }
306 }
307
308 return 0;
309
310 error_out_unreg:
311 drm_lastclose(dev);
312 return retcode;
313 }
314 EXPORT_SYMBOL(drm_fill_in_dev);
315
316
317 /**
318 * Get a secondary minor number.
319 *
320 * \param dev device data structure
321 * \param sec-minor structure to hold the assigned minor
322 * \return negative number on failure.
323 *
324 * Search an empty entry and initialize it to the given parameters, and
325 * create the proc init entry via proc_init(). This routines assigns
326 * minor numbers to secondary heads of multi-headed cards
327 */
drm_get_minor(struct drm_device * dev,struct drm_minor ** minor,int type)328 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
329 {
330 struct drm_minor *new_minor;
331 int ret;
332 int minor_id;
333
334 DRM_DEBUG("\n");
335
336 minor_id = drm_minor_get_id(dev, type);
337 if (minor_id < 0)
338 return minor_id;
339
340 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
341 if (!new_minor) {
342 ret = -ENOMEM;
343 goto err_idr;
344 }
345
346 new_minor->type = type;
347 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
348 new_minor->dev = dev;
349 new_minor->index = minor_id;
350 INIT_LIST_HEAD(&new_minor->master_list);
351
352 idr_replace(&drm_minors_idr, new_minor, minor_id);
353
354 if (type == DRM_MINOR_LEGACY) {
355 ret = drm_proc_init(new_minor, drm_proc_root);
356 if (ret) {
357 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
358 goto err_mem;
359 }
360 } else
361 new_minor->proc_root = NULL;
362
363 #if defined(CONFIG_DEBUG_FS)
364 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
365 if (ret) {
366 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
367 goto err_g2;
368 }
369 #endif
370
371 ret = drm_sysfs_device_add(new_minor);
372 if (ret) {
373 printk(KERN_ERR
374 "DRM: Error sysfs_device_add.\n");
375 goto err_g2;
376 }
377 *minor = new_minor;
378
379 DRM_DEBUG("new minor assigned %d\n", minor_id);
380 return 0;
381
382
383 err_g2:
384 if (new_minor->type == DRM_MINOR_LEGACY)
385 drm_proc_cleanup(new_minor, drm_proc_root);
386 err_mem:
387 kfree(new_minor);
388 err_idr:
389 idr_remove(&drm_minors_idr, minor_id);
390 *minor = NULL;
391 return ret;
392 }
393 EXPORT_SYMBOL(drm_get_minor);
394
395 /**
396 * Put a secondary minor number.
397 *
398 * \param sec_minor - structure to be released
399 * \return always zero
400 *
401 * Cleans up the proc resources. Not legal for this to be the
402 * last minor released.
403 *
404 */
drm_put_minor(struct drm_minor ** minor_p)405 int drm_put_minor(struct drm_minor **minor_p)
406 {
407 struct drm_minor *minor = *minor_p;
408
409 DRM_DEBUG("release secondary minor %d\n", minor->index);
410
411 if (minor->type == DRM_MINOR_LEGACY)
412 drm_proc_cleanup(minor, drm_proc_root);
413 #if defined(CONFIG_DEBUG_FS)
414 drm_debugfs_cleanup(minor);
415 #endif
416
417 drm_sysfs_device_remove(minor);
418
419 idr_remove(&drm_minors_idr, minor->index);
420
421 kfree(minor);
422 *minor_p = NULL;
423 return 0;
424 }
425 EXPORT_SYMBOL(drm_put_minor);
426
drm_unplug_minor(struct drm_minor * minor)427 static void drm_unplug_minor(struct drm_minor *minor)
428 {
429 drm_sysfs_device_remove(minor);
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 */
drm_put_dev(struct drm_device * dev)439 void 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 kfree(dev->devname);
489 kfree(dev);
490 }
491 EXPORT_SYMBOL(drm_put_dev);
492
drm_unplug_dev(struct drm_device * dev)493 void drm_unplug_dev(struct drm_device *dev)
494 {
495 /* for a USB device */
496 if (drm_core_check_feature(dev, DRIVER_MODESET))
497 drm_unplug_minor(dev->control);
498 drm_unplug_minor(dev->primary);
499
500 mutex_lock(&drm_global_mutex);
501
502 drm_device_set_unplugged(dev);
503
504 if (dev->open_count == 0) {
505 drm_put_dev(dev);
506 }
507 mutex_unlock(&drm_global_mutex);
508 }
509 EXPORT_SYMBOL(drm_unplug_dev);
510