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;
drm_ut_debug_printk(unsigned int request_level,const char * prefix,const char * function_name,const char * format,...)65 void drm_ut_debug_printk(unsigned int request_level,
66 const char *prefix,
67 const char *function_name,
68 const char *format, ...)
69 {
70 va_list args;
71
72 if (drm_debug & request_level) {
73 if (function_name)
74 printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
75 va_start(args, format);
76 vprintk(format, args);
77 va_end(args);
78 }
79 }
80 EXPORT_SYMBOL(drm_ut_debug_printk);
drm_minor_get_id(struct drm_device * dev,int type)81 static int drm_minor_get_id(struct drm_device *dev, int type)
82 {
83 int new_id;
84 int ret;
85 int base = 0, limit = 63;
86
87 if (type == DRM_MINOR_CONTROL) {
88 base += 64;
89 limit = base + 127;
90 } else if (type == DRM_MINOR_RENDER) {
91 base += 128;
92 limit = base + 255;
93 }
94
95 again:
96 if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
97 DRM_ERROR("Out of memory expanding drawable idr\n");
98 return -ENOMEM;
99 }
100 mutex_lock(&dev->struct_mutex);
101 ret = idr_get_new_above(&drm_minors_idr, NULL,
102 base, &new_id);
103 mutex_unlock(&dev->struct_mutex);
104 if (ret == -EAGAIN) {
105 goto again;
106 } else if (ret) {
107 return ret;
108 }
109
110 if (new_id >= limit) {
111 idr_remove(&drm_minors_idr, new_id);
112 return -EINVAL;
113 }
114 return new_id;
115 }
116
drm_master_create(struct drm_minor * minor)117 struct drm_master *drm_master_create(struct drm_minor *minor)
118 {
119 struct drm_master *master;
120
121 master = kzalloc(sizeof(*master), GFP_KERNEL);
122 if (!master)
123 return NULL;
124
125 kref_init(&master->refcount);
126 spin_lock_init(&master->lock.spinlock);
127 init_waitqueue_head(&master->lock.lock_queue);
128 drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
129 INIT_LIST_HEAD(&master->magicfree);
130 master->minor = minor;
131
132 list_add_tail(&master->head, &minor->master_list);
133
134 return master;
135 }
136
drm_master_get(struct drm_master * master)137 struct drm_master *drm_master_get(struct drm_master *master)
138 {
139 kref_get(&master->refcount);
140 return master;
141 }
142 EXPORT_SYMBOL(drm_master_get);
143
drm_master_destroy(struct kref * kref)144 static void drm_master_destroy(struct kref *kref)
145 {
146 struct drm_master *master = container_of(kref, struct drm_master, refcount);
147 struct drm_magic_entry *pt, *next;
148 struct drm_device *dev = master->minor->dev;
149 struct drm_map_list *r_list, *list_temp;
150
151 list_del(&master->head);
152
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 kfree(master);
181 }
182
drm_master_put(struct drm_master ** master)183 void drm_master_put(struct drm_master **master)
184 {
185 kref_put(&(*master)->refcount, drm_master_destroy);
186 *master = NULL;
187 }
188 EXPORT_SYMBOL(drm_master_put);
189
drm_setmaster_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)190 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
191 struct drm_file *file_priv)
192 {
193 int ret = 0;
194
195 if (file_priv->is_master)
196 return 0;
197
198 if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
199 return -EINVAL;
200
201 if (!file_priv->master)
202 return -EINVAL;
203
204 if (!file_priv->minor->master &&
205 file_priv->minor->master != file_priv->master) {
206 mutex_lock(&dev->struct_mutex);
207 file_priv->minor->master = drm_master_get(file_priv->master);
208 file_priv->is_master = 1;
209 if (dev->driver->master_set) {
210 ret = dev->driver->master_set(dev, file_priv, false);
211 if (unlikely(ret != 0)) {
212 file_priv->is_master = 0;
213 drm_master_put(&file_priv->minor->master);
214 }
215 }
216 mutex_unlock(&dev->struct_mutex);
217 }
218
219 return 0;
220 }
221
drm_dropmaster_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)222 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
223 struct drm_file *file_priv)
224 {
225 if (!file_priv->is_master)
226 return -EINVAL;
227
228 if (!file_priv->minor->master)
229 return -EINVAL;
230
231 mutex_lock(&dev->struct_mutex);
232 if (dev->driver->master_drop)
233 dev->driver->master_drop(dev, file_priv, false);
234 drm_master_put(&file_priv->minor->master);
235 file_priv->is_master = 0;
236 mutex_unlock(&dev->struct_mutex);
237 return 0;
238 }
239
drm_fill_in_dev(struct drm_device * dev,const struct pci_device_id * ent,struct drm_driver * driver)240 int drm_fill_in_dev(struct drm_device *dev,
241 const struct pci_device_id *ent,
242 struct drm_driver *driver)
243 {
244 int retcode;
245
246 INIT_LIST_HEAD(&dev->filelist);
247 INIT_LIST_HEAD(&dev->ctxlist);
248 INIT_LIST_HEAD(&dev->vmalist);
249 INIT_LIST_HEAD(&dev->maplist);
250 INIT_LIST_HEAD(&dev->vblank_event_list);
251
252 spin_lock_init(&dev->count_lock);
253 spin_lock_init(&dev->event_lock);
254 mutex_init(&dev->struct_mutex);
255 mutex_init(&dev->ctxlist_mutex);
256
257 if (drm_ht_create(&dev->map_hash, 12)) {
258 return -ENOMEM;
259 }
260
261 /* the DRM has 6 basic counters */
262 dev->counters = 6;
263 dev->types[0] = _DRM_STAT_LOCK;
264 dev->types[1] = _DRM_STAT_OPENS;
265 dev->types[2] = _DRM_STAT_CLOSES;
266 dev->types[3] = _DRM_STAT_IOCTLS;
267 dev->types[4] = _DRM_STAT_LOCKS;
268 dev->types[5] = _DRM_STAT_UNLOCKS;
269
270 dev->driver = driver;
271
272 if (dev->driver->bus->agp_init) {
273 retcode = dev->driver->bus->agp_init(dev);
274 if (retcode)
275 goto error_out_unreg;
276 }
277
278
279
280 retcode = drm_ctxbitmap_init(dev);
281 if (retcode) {
282 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
283 goto error_out_unreg;
284 }
285
286 if (driver->driver_features & DRIVER_GEM) {
287 retcode = drm_gem_init(dev);
288 if (retcode) {
289 DRM_ERROR("Cannot initialize graphics execution "
290 "manager (GEM)\n");
291 goto error_out_unreg;
292 }
293 }
294
295 return 0;
296
297 error_out_unreg:
298 drm_lastclose(dev);
299 return retcode;
300 }
301
302
303 /**
304 * Get a secondary minor number.
305 *
306 * \param dev device data structure
307 * \param sec-minor structure to hold the assigned minor
308 * \return negative number on failure.
309 *
310 * Search an empty entry and initialize it to the given parameters, and
311 * create the proc init entry via proc_init(). This routines assigns
312 * minor numbers to secondary heads of multi-headed cards
313 */
drm_get_minor(struct drm_device * dev,struct drm_minor ** minor,int type)314 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
315 {
316 struct drm_minor *new_minor;
317 int ret;
318 int minor_id;
319
320 DRM_DEBUG("\n");
321
322 minor_id = drm_minor_get_id(dev, type);
323 if (minor_id < 0)
324 return minor_id;
325
326 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
327 if (!new_minor) {
328 ret = -ENOMEM;
329 goto err_idr;
330 }
331
332 new_minor->type = type;
333 new_minor->device = MKDEV(DRM_MAJOR, minor_id);
334 new_minor->dev = dev;
335 new_minor->index = minor_id;
336 INIT_LIST_HEAD(&new_minor->master_list);
337
338 idr_replace(&drm_minors_idr, new_minor, minor_id);
339
340 if (type == DRM_MINOR_LEGACY) {
341 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
342 if (ret) {
343 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
344 goto err_mem;
345 }
346 } else
347 new_minor->proc_root = NULL;
348
349 #if defined(CONFIG_DEBUG_FS)
350 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
351 if (ret) {
352 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
353 goto err_g2;
354 }
355 #endif
356
357 ret = drm_sysfs_device_add(new_minor);
358 if (ret) {
359 printk(KERN_ERR
360 "DRM: Error sysfs_device_add.\n");
361 goto err_g2;
362 }
363 *minor = new_minor;
364
365 DRM_DEBUG("new minor assigned %d\n", minor_id);
366 return 0;
367
368
369 err_g2:
370 if (new_minor->type == DRM_MINOR_LEGACY)
371 drm_proc_cleanup(new_minor, drm_proc_root);
372 err_mem:
373 kfree(new_minor);
374 err_idr:
375 idr_remove(&drm_minors_idr, minor_id);
376 *minor = NULL;
377 return ret;
378 }
379
380 /**
381 * Put a secondary minor number.
382 *
383 * \param sec_minor - structure to be released
384 * \return always zero
385 *
386 * Cleans up the proc resources. Not legal for this to be the
387 * last minor released.
388 *
389 */
drm_put_minor(struct drm_minor ** minor_p)390 int drm_put_minor(struct drm_minor **minor_p)
391 {
392 struct drm_minor *minor = *minor_p;
393
394 DRM_DEBUG("release secondary minor %d\n", minor->index);
395
396 if (minor->type == DRM_MINOR_LEGACY)
397 drm_proc_cleanup(minor, drm_proc_root);
398 #if defined(CONFIG_DEBUG_FS)
399 drm_debugfs_cleanup(minor);
400 #endif
401
402 drm_sysfs_device_remove(minor);
403
404 idr_remove(&drm_minors_idr, minor->index);
405
406 kfree(minor);
407 *minor_p = NULL;
408 return 0;
409 }
410
411 /**
412 * Called via drm_exit() at module unload time or when pci device is
413 * unplugged.
414 *
415 * Cleans up all DRM device, calling drm_lastclose().
416 *
417 */
drm_put_dev(struct drm_device * dev)418 void drm_put_dev(struct drm_device *dev)
419 {
420 struct drm_driver *driver;
421 struct drm_map_list *r_list, *list_temp;
422
423 DRM_DEBUG("\n");
424
425 if (!dev) {
426 DRM_ERROR("cleanup called no dev\n");
427 return;
428 }
429 driver = dev->driver;
430
431 drm_lastclose(dev);
432
433 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
434 dev->agp && dev->agp->agp_mtrr >= 0) {
435 int retval;
436 retval = mtrr_del(dev->agp->agp_mtrr,
437 dev->agp->agp_info.aper_base,
438 dev->agp->agp_info.aper_size * 1024 * 1024);
439 DRM_DEBUG("mtrr_del=%d\n", retval);
440 }
441
442 if (dev->driver->unload)
443 dev->driver->unload(dev);
444
445 if (drm_core_has_AGP(dev) && dev->agp) {
446 kfree(dev->agp);
447 dev->agp = NULL;
448 }
449
450 drm_vblank_cleanup(dev);
451
452 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
453 drm_rmmap(dev, r_list->map);
454 drm_ht_remove(&dev->map_hash);
455
456 drm_ctxbitmap_cleanup(dev);
457
458 if (drm_core_check_feature(dev, DRIVER_MODESET))
459 drm_put_minor(&dev->control);
460
461 if (driver->driver_features & DRIVER_GEM)
462 drm_gem_destroy(dev);
463
464 drm_put_minor(&dev->primary);
465
466 list_del(&dev->driver_item);
467 if (dev->devname) {
468 kfree(dev->devname);
469 dev->devname = NULL;
470 }
471 kfree(dev);
472 }
473 EXPORT_SYMBOL(drm_put_dev);
474