Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / gpu / drm / drm_stub.c
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 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);
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
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
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
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
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
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
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
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 (drm_core_has_AGP(dev)) {
273                 if (drm_device_is_agp(dev))
274                         dev->agp = drm_agp_init(dev);
275                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
276                     && (dev->agp == NULL)) {
277                         DRM_ERROR("Cannot initialize the agpgart module.\n");
278                         retcode = -EINVAL;
279                         goto error_out_unreg;
280                 }
281                 if (drm_core_has_MTRR(dev)) {
282                         if (dev->agp)
283                                 dev->agp->agp_mtrr =
284                                     mtrr_add(dev->agp->agp_info.aper_base,
285                                              dev->agp->agp_info.aper_size *
286                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
287                 }
288         }
289
290
291         retcode = drm_ctxbitmap_init(dev);
292         if (retcode) {
293                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
294                 goto error_out_unreg;
295         }
296
297         if (driver->driver_features & DRIVER_GEM) {
298                 retcode = drm_gem_init(dev);
299                 if (retcode) {
300                         DRM_ERROR("Cannot initialize graphics execution "
301                                   "manager (GEM)\n");
302                         goto error_out_unreg;
303                 }
304         }
305
306         return 0;
307
308       error_out_unreg:
309         drm_lastclose(dev);
310         return retcode;
311 }
312
313
314 /**
315  * Get a secondary minor number.
316  *
317  * \param dev device data structure
318  * \param sec-minor structure to hold the assigned minor
319  * \return negative number on failure.
320  *
321  * Search an empty entry and initialize it to the given parameters, and
322  * create the proc init entry via proc_init(). This routines assigns
323  * minor numbers to secondary heads of multi-headed cards
324  */
325 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
326 {
327         struct drm_minor *new_minor;
328         int ret;
329         int minor_id;
330
331         DRM_DEBUG("\n");
332
333         minor_id = drm_minor_get_id(dev, type);
334         if (minor_id < 0)
335                 return minor_id;
336
337         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
338         if (!new_minor) {
339                 ret = -ENOMEM;
340                 goto err_idr;
341         }
342
343         new_minor->type = type;
344         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
345         new_minor->dev = dev;
346         new_minor->index = minor_id;
347         INIT_LIST_HEAD(&new_minor->master_list);
348
349         idr_replace(&drm_minors_idr, new_minor, minor_id);
350
351         if (type == DRM_MINOR_LEGACY) {
352                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
353                 if (ret) {
354                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
355                         goto err_mem;
356                 }
357         } else
358                 new_minor->proc_root = NULL;
359
360 #if defined(CONFIG_DEBUG_FS)
361         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
362         if (ret) {
363                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
364                 goto err_g2;
365         }
366 #endif
367
368         ret = drm_sysfs_device_add(new_minor);
369         if (ret) {
370                 printk(KERN_ERR
371                        "DRM: Error sysfs_device_add.\n");
372                 goto err_g2;
373         }
374         *minor = new_minor;
375
376         DRM_DEBUG("new minor assigned %d\n", minor_id);
377         return 0;
378
379
380 err_g2:
381         if (new_minor->type == DRM_MINOR_LEGACY)
382                 drm_proc_cleanup(new_minor, drm_proc_root);
383 err_mem:
384         kfree(new_minor);
385 err_idr:
386         idr_remove(&drm_minors_idr, minor_id);
387         *minor = NULL;
388         return ret;
389 }
390
391 /**
392  * Put a secondary minor number.
393  *
394  * \param sec_minor - structure to be released
395  * \return always zero
396  *
397  * Cleans up the proc resources. Not legal for this to be the
398  * last minor released.
399  *
400  */
401 int drm_put_minor(struct drm_minor **minor_p)
402 {
403         struct drm_minor *minor = *minor_p;
404
405         DRM_DEBUG("release secondary minor %d\n", minor->index);
406
407         if (minor->type == DRM_MINOR_LEGACY)
408                 drm_proc_cleanup(minor, drm_proc_root);
409 #if defined(CONFIG_DEBUG_FS)
410         drm_debugfs_cleanup(minor);
411 #endif
412
413         drm_sysfs_device_remove(minor);
414
415         idr_remove(&drm_minors_idr, minor->index);
416
417         kfree(minor);
418         *minor_p = NULL;
419         return 0;
420 }
421
422 /**
423  * Called via drm_exit() at module unload time or when pci device is
424  * unplugged.
425  *
426  * Cleans up all DRM device, calling drm_lastclose().
427  *
428  * \sa drm_init
429  */
430 void drm_put_dev(struct drm_device *dev)
431 {
432         struct drm_driver *driver;
433         struct drm_map_list *r_list, *list_temp;
434
435         DRM_DEBUG("\n");
436
437         if (!dev) {
438                 DRM_ERROR("cleanup called no dev\n");
439                 return;
440         }
441         driver = dev->driver;
442
443         drm_lastclose(dev);
444
445         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
446             dev->agp && dev->agp->agp_mtrr >= 0) {
447                 int retval;
448                 retval = mtrr_del(dev->agp->agp_mtrr,
449                                   dev->agp->agp_info.aper_base,
450                                   dev->agp->agp_info.aper_size * 1024 * 1024);
451                 DRM_DEBUG("mtrr_del=%d\n", retval);
452         }
453
454         if (dev->driver->unload)
455                 dev->driver->unload(dev);
456
457         if (drm_core_has_AGP(dev) && dev->agp) {
458                 kfree(dev->agp);
459                 dev->agp = NULL;
460         }
461
462         drm_vblank_cleanup(dev);
463
464         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
465                 drm_rmmap(dev, r_list->map);
466         drm_ht_remove(&dev->map_hash);
467
468         drm_ctxbitmap_cleanup(dev);
469
470         if (drm_core_check_feature(dev, DRIVER_MODESET))
471                 drm_put_minor(&dev->control);
472
473         if (driver->driver_features & DRIVER_GEM)
474                 drm_gem_destroy(dev);
475
476         drm_put_minor(&dev->primary);
477
478         if (dev->devname) {
479                 kfree(dev->devname);
480                 dev->devname = NULL;
481         }
482         kfree(dev);
483 }
484 EXPORT_SYMBOL(drm_put_dev);