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
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 MODULE_AUTHOR(CORE_AUTHOR);
50 MODULE_DESCRIPTION(CORE_DESC);
51 MODULE_LICENSE("GPL and additional rights");
52 MODULE_PARM_DESC(debug, "Enable debug output");
53 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
54 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
55
56 module_param_named(debug, drm_debug, int, 0600);
57 module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
58 module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
59
60 struct idr drm_minors_idr;
61
62 struct class *drm_class;
63 struct proc_dir_entry *drm_proc_root;
64 struct dentry *drm_debugfs_root;
65
drm_err(const char * func,const char * format,...)66 int 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 }
83 EXPORT_SYMBOL(drm_err);
84
drm_ut_debug_printk(unsigned int request_level,const char * prefix,const char * function_name,const char * format,...)85 void 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 }
100 EXPORT_SYMBOL(drm_ut_debug_printk);
101
drm_minor_get_id(struct drm_device * dev,int type)102 static 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
116 again:
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
drm_master_create(struct drm_minor * minor)138 struct 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
drm_master_get(struct drm_master * master)158 struct drm_master *drm_master_get(struct drm_master *master)
159 {
160 kref_get(&master->refcount);
161 return master;
162 }
163 EXPORT_SYMBOL(drm_master_get);
164
drm_master_destroy(struct kref * kref)165 static 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
drm_master_put(struct drm_master ** master)204 void drm_master_put(struct drm_master **master)
205 {
206 kref_put(&(*master)->refcount, drm_master_destroy);
207 *master = NULL;
208 }
209 EXPORT_SYMBOL(drm_master_put);
210
drm_setmaster_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)211 int 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
drm_dropmaster_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)243 int 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
drm_fill_in_dev(struct drm_device * dev,const struct pci_device_id * ent,struct drm_driver * driver)261 int 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 EXPORT_SYMBOL(drm_fill_in_dev);
323
324
325 /**
326 * Get a secondary minor number.
327 *
328 * \param dev device data structure
329 * \param sec-minor structure to hold the assigned minor
330 * \return negative number on failure.
331 *
332 * Search an empty entry and initialize it to the given parameters, and
333 * create the proc init entry via proc_init(). This routines assigns
334 * minor numbers to secondary heads of multi-headed cards
335 */
drm_get_minor(struct drm_device * dev,struct drm_minor ** minor,int type)336 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
337 {
338 struct drm_minor *new_minor;
339 int ret;
340 int minor_id;
341
342 DRM_DEBUG("\n");
343
344 minor_id = drm_minor_get_id(dev, type);
345 if (minor_id < 0)
346 return minor_id;
347
348 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
349 if (!new_minor) {
350 ret = -ENOMEM;
351 goto err_idr;
352 }
353
354 new_minor->type = type;
355 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
356 new_minor->dev = dev;
357 new_minor->index = minor_id;
358 INIT_LIST_HEAD(&new_minor->master_list);
359
360 idr_replace(&drm_minors_idr, new_minor, minor_id);
361
362 if (type == DRM_MINOR_LEGACY) {
363 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
364 if (ret) {
365 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
366 goto err_mem;
367 }
368 } else
369 new_minor->proc_root = NULL;
370
371 #if defined(CONFIG_DEBUG_FS)
372 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
373 if (ret) {
374 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
375 goto err_g2;
376 }
377 #endif
378
379 ret = drm_sysfs_device_add(new_minor);
380 if (ret) {
381 printk(KERN_ERR
382 "DRM: Error sysfs_device_add.\n");
383 goto err_g2;
384 }
385 *minor = new_minor;
386
387 DRM_DEBUG("new minor assigned %d\n", minor_id);
388 return 0;
389
390
391 err_g2:
392 if (new_minor->type == DRM_MINOR_LEGACY)
393 drm_proc_cleanup(new_minor, drm_proc_root);
394 err_mem:
395 kfree(new_minor);
396 err_idr:
397 idr_remove(&drm_minors_idr, minor_id);
398 *minor = NULL;
399 return ret;
400 }
401 EXPORT_SYMBOL(drm_get_minor);
402
403 /**
404 * Put a secondary minor number.
405 *
406 * \param sec_minor - structure to be released
407 * \return always zero
408 *
409 * Cleans up the proc resources. Not legal for this to be the
410 * last minor released.
411 *
412 */
drm_put_minor(struct drm_minor ** minor_p)413 int drm_put_minor(struct drm_minor **minor_p)
414 {
415 struct drm_minor *minor = *minor_p;
416
417 DRM_DEBUG("release secondary minor %d\n", minor->index);
418
419 if (minor->type == DRM_MINOR_LEGACY)
420 drm_proc_cleanup(minor, drm_proc_root);
421 #if defined(CONFIG_DEBUG_FS)
422 drm_debugfs_cleanup(minor);
423 #endif
424
425 drm_sysfs_device_remove(minor);
426
427 idr_remove(&drm_minors_idr, minor->index);
428
429 kfree(minor);
430 *minor_p = NULL;
431 return 0;
432 }
433 EXPORT_SYMBOL(drm_put_minor);
434
drm_unplug_minor(struct drm_minor * minor)435 static void drm_unplug_minor(struct drm_minor *minor)
436 {
437 drm_sysfs_device_remove(minor);
438 }
439
440 /**
441 * Called via drm_exit() at module unload time or when pci device is
442 * unplugged.
443 *
444 * Cleans up all DRM device, calling drm_lastclose().
445 *
446 */
drm_put_dev(struct drm_device * dev)447 void drm_put_dev(struct drm_device *dev)
448 {
449 struct drm_driver *driver;
450 struct drm_map_list *r_list, *list_temp;
451
452 DRM_DEBUG("\n");
453
454 if (!dev) {
455 DRM_ERROR("cleanup called no dev\n");
456 return;
457 }
458 driver = dev->driver;
459
460 drm_lastclose(dev);
461
462 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
463 dev->agp && dev->agp->agp_mtrr >= 0) {
464 int retval;
465 retval = mtrr_del(dev->agp->agp_mtrr,
466 dev->agp->agp_info.aper_base,
467 dev->agp->agp_info.aper_size * 1024 * 1024);
468 DRM_DEBUG("mtrr_del=%d\n", retval);
469 }
470
471 if (dev->driver->unload)
472 dev->driver->unload(dev);
473
474 if (drm_core_has_AGP(dev) && dev->agp) {
475 kfree(dev->agp);
476 dev->agp = NULL;
477 }
478
479 drm_vblank_cleanup(dev);
480
481 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
482 drm_rmmap(dev, r_list->map);
483 drm_ht_remove(&dev->map_hash);
484
485 drm_ctxbitmap_cleanup(dev);
486
487 if (drm_core_check_feature(dev, DRIVER_MODESET))
488 drm_put_minor(&dev->control);
489
490 if (driver->driver_features & DRIVER_GEM)
491 drm_gem_destroy(dev);
492
493 drm_put_minor(&dev->primary);
494
495 list_del(&dev->driver_item);
496 if (dev->devname) {
497 kfree(dev->devname);
498 dev->devname = NULL;
499 }
500 kfree(dev);
501 }
502 EXPORT_SYMBOL(drm_put_dev);
503
drm_unplug_dev(struct drm_device * dev)504 void drm_unplug_dev(struct drm_device *dev)
505 {
506 /* for a USB device */
507 if (drm_core_check_feature(dev, DRIVER_MODESET))
508 drm_unplug_minor(dev->control);
509 drm_unplug_minor(dev->primary);
510
511 mutex_lock(&drm_global_mutex);
512
513 drm_device_set_unplugged(dev);
514
515 if (dev->open_count == 0) {
516 drm_put_dev(dev);
517 }
518 mutex_unlock(&drm_global_mutex);
519 }
520 EXPORT_SYMBOL(drm_unplug_dev);
521