a0c365f2e521a393ead336e55950ba8aa966c11e
[kernel.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 MODULE_AUTHOR(CORE_AUTHOR);
44 MODULE_DESCRIPTION(CORE_DESC);
45 MODULE_LICENSE("GPL and additional rights");
46 MODULE_PARM_DESC(debug, "Enable debug output");
47
48 module_param_named(debug, drm_debug, int, 0600);
49
50 struct idr drm_minors_idr;
51
52 struct class *drm_class;
53 struct proc_dir_entry *drm_proc_root;
54 struct dentry *drm_debugfs_root;
55 void drm_ut_debug_printk(unsigned int request_level,
56                          const char *prefix,
57                          const char *function_name,
58                          const char *format, ...)
59 {
60         va_list args;
61
62         if (drm_debug & request_level) {
63                 if (function_name)
64                         printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
65                 va_start(args, format);
66                 vprintk(format, args);
67                 va_end(args);
68         }
69 }
70 EXPORT_SYMBOL(drm_ut_debug_printk);
71 static int drm_minor_get_id(struct drm_device *dev, int type)
72 {
73         int new_id;
74         int ret;
75         int base = 0, limit = 63;
76
77         if (type == DRM_MINOR_CONTROL) {
78                 base += 64;
79                 limit = base + 127;
80         } else if (type == DRM_MINOR_RENDER) {
81                 base += 128;
82                 limit = base + 255;
83         }
84
85 again:
86         if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
87                 DRM_ERROR("Out of memory expanding drawable idr\n");
88                 return -ENOMEM;
89         }
90         mutex_lock(&dev->struct_mutex);
91         ret = idr_get_new_above(&drm_minors_idr, NULL,
92                                 base, &new_id);
93         mutex_unlock(&dev->struct_mutex);
94         if (ret == -EAGAIN) {
95                 goto again;
96         } else if (ret) {
97                 return ret;
98         }
99
100         if (new_id >= limit) {
101                 idr_remove(&drm_minors_idr, new_id);
102                 return -EINVAL;
103         }
104         return new_id;
105 }
106
107 struct drm_master *drm_master_create(struct drm_minor *minor)
108 {
109         struct drm_master *master;
110
111         master = kzalloc(sizeof(*master), GFP_KERNEL);
112         if (!master)
113                 return NULL;
114
115         kref_init(&master->refcount);
116         spin_lock_init(&master->lock.spinlock);
117         init_waitqueue_head(&master->lock.lock_queue);
118         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
119         INIT_LIST_HEAD(&master->magicfree);
120         master->minor = minor;
121
122         list_add_tail(&master->head, &minor->master_list);
123
124         return master;
125 }
126
127 struct drm_master *drm_master_get(struct drm_master *master)
128 {
129         kref_get(&master->refcount);
130         return master;
131 }
132 EXPORT_SYMBOL(drm_master_get);
133
134 static void drm_master_destroy(struct kref *kref)
135 {
136         struct drm_master *master = container_of(kref, struct drm_master, refcount);
137         struct drm_magic_entry *pt, *next;
138         struct drm_device *dev = master->minor->dev;
139         struct drm_map_list *r_list, *list_temp;
140
141         list_del(&master->head);
142
143         if (dev->driver->master_destroy)
144                 dev->driver->master_destroy(dev, master);
145
146         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
147                 if (r_list->master == master) {
148                         drm_rmmap_locked(dev, r_list->map);
149                         r_list = NULL;
150                 }
151         }
152
153         if (master->unique) {
154                 kfree(master->unique);
155                 master->unique = NULL;
156                 master->unique_len = 0;
157         }
158
159         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
160                 list_del(&pt->head);
161                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
162                 kfree(pt);
163         }
164
165         drm_ht_remove(&master->magiclist);
166
167         kfree(master);
168 }
169
170 void drm_master_put(struct drm_master **master)
171 {
172         kref_put(&(*master)->refcount, drm_master_destroy);
173         *master = NULL;
174 }
175 EXPORT_SYMBOL(drm_master_put);
176
177 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
178                         struct drm_file *file_priv)
179 {
180         int ret = 0;
181
182         if (file_priv->is_master)
183                 return 0;
184
185         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
186                 return -EINVAL;
187
188         if (!file_priv->master)
189                 return -EINVAL;
190
191         if (!file_priv->minor->master &&
192             file_priv->minor->master != file_priv->master) {
193                 mutex_lock(&dev->struct_mutex);
194                 file_priv->minor->master = drm_master_get(file_priv->master);
195                 file_priv->is_master = 1;
196                 if (dev->driver->master_set) {
197                         ret = dev->driver->master_set(dev, file_priv, false);
198                         if (unlikely(ret != 0)) {
199                                 file_priv->is_master = 0;
200                                 drm_master_put(&file_priv->minor->master);
201                         }
202                 }
203                 mutex_unlock(&dev->struct_mutex);
204         }
205
206         return 0;
207 }
208
209 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
210                          struct drm_file *file_priv)
211 {
212         if (!file_priv->is_master)
213                 return -EINVAL;
214
215         if (!file_priv->minor->master)
216                 return -EINVAL;
217
218         mutex_lock(&dev->struct_mutex);
219         if (dev->driver->master_drop)
220                 dev->driver->master_drop(dev, file_priv, false);
221         drm_master_put(&file_priv->minor->master);
222         file_priv->is_master = 0;
223         mutex_unlock(&dev->struct_mutex);
224         return 0;
225 }
226
227 static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
228                            const struct pci_device_id *ent,
229                            struct drm_driver *driver)
230 {
231         int retcode;
232
233         INIT_LIST_HEAD(&dev->filelist);
234         INIT_LIST_HEAD(&dev->ctxlist);
235         INIT_LIST_HEAD(&dev->vmalist);
236         INIT_LIST_HEAD(&dev->maplist);
237         INIT_LIST_HEAD(&dev->vblank_event_list);
238
239         spin_lock_init(&dev->count_lock);
240         spin_lock_init(&dev->drw_lock);
241         spin_lock_init(&dev->event_lock);
242         init_timer(&dev->timer);
243         mutex_init(&dev->struct_mutex);
244         mutex_init(&dev->ctxlist_mutex);
245
246         idr_init(&dev->drw_idr);
247
248         dev->pdev = pdev;
249         dev->pci_device = pdev->device;
250         dev->pci_vendor = pdev->vendor;
251
252 #ifdef __alpha__
253         dev->hose = pdev->sysdata;
254 #endif
255
256         if (drm_ht_create(&dev->map_hash, 12)) {
257                 return -ENOMEM;
258         }
259
260         /* the DRM has 6 basic counters */
261         dev->counters = 6;
262         dev->types[0] = _DRM_STAT_LOCK;
263         dev->types[1] = _DRM_STAT_OPENS;
264         dev->types[2] = _DRM_STAT_CLOSES;
265         dev->types[3] = _DRM_STAT_IOCTLS;
266         dev->types[4] = _DRM_STAT_LOCKS;
267         dev->types[5] = _DRM_STAT_UNLOCKS;
268
269         dev->driver = driver;
270
271         if (drm_core_has_AGP(dev)) {
272                 if (drm_device_is_agp(dev))
273                         dev->agp = drm_agp_init(dev);
274                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
275                     && (dev->agp == NULL)) {
276                         DRM_ERROR("Cannot initialize the agpgart module.\n");
277                         retcode = -EINVAL;
278                         goto error_out_unreg;
279                 }
280                 if (drm_core_has_MTRR(dev)) {
281                         if (dev->agp)
282                                 dev->agp->agp_mtrr =
283                                     mtrr_add(dev->agp->agp_info.aper_base,
284                                              dev->agp->agp_info.aper_size *
285                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
286                 }
287         }
288
289
290         retcode = drm_ctxbitmap_init(dev);
291         if (retcode) {
292                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
293                 goto error_out_unreg;
294         }
295
296         if (driver->driver_features & DRIVER_GEM) {
297                 retcode = drm_gem_init(dev);
298                 if (retcode) {
299                         DRM_ERROR("Cannot initialize graphics execution "
300                                   "manager (GEM)\n");
301                         goto error_out_unreg;
302                 }
303         }
304
305         return 0;
306
307       error_out_unreg:
308         drm_lastclose(dev);
309         return retcode;
310 }
311
312
313 /**
314  * Get a secondary minor number.
315  *
316  * \param dev device data structure
317  * \param sec-minor structure to hold the assigned minor
318  * \return negative number on failure.
319  *
320  * Search an empty entry and initialize it to the given parameters, and
321  * create the proc init entry via proc_init(). This routines assigns
322  * minor numbers to secondary heads of multi-headed cards
323  */
324 static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
325 {
326         struct drm_minor *new_minor;
327         int ret;
328         int minor_id;
329
330         DRM_DEBUG("\n");
331
332         minor_id = drm_minor_get_id(dev, type);
333         if (minor_id < 0)
334                 return minor_id;
335
336         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
337         if (!new_minor) {
338                 ret = -ENOMEM;
339                 goto err_idr;
340         }
341
342         new_minor->type = type;
343         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
344         new_minor->dev = dev;
345         new_minor->index = minor_id;
346         INIT_LIST_HEAD(&new_minor->master_list);
347
348         idr_replace(&drm_minors_idr, new_minor, minor_id);
349
350         if (type == DRM_MINOR_LEGACY) {
351                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
352                 if (ret) {
353                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
354                         goto err_mem;
355                 }
356         } else
357                 new_minor->proc_root = NULL;
358
359 #if defined(CONFIG_DEBUG_FS)
360         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
361         if (ret) {
362                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
363                 goto err_g2;
364         }
365 #endif
366
367         ret = drm_sysfs_device_add(new_minor);
368         if (ret) {
369                 printk(KERN_ERR
370                        "DRM: Error sysfs_device_add.\n");
371                 goto err_g2;
372         }
373         *minor = new_minor;
374
375         DRM_DEBUG("new minor assigned %d\n", minor_id);
376         return 0;
377
378
379 err_g2:
380         if (new_minor->type == DRM_MINOR_LEGACY)
381                 drm_proc_cleanup(new_minor, drm_proc_root);
382 err_mem:
383         kfree(new_minor);
384 err_idr:
385         idr_remove(&drm_minors_idr, minor_id);
386         *minor = NULL;
387         return ret;
388 }
389
390 /**
391  * Register.
392  *
393  * \param pdev - PCI device structure
394  * \param ent entry from the PCI ID table with device type flags
395  * \return zero on success or a negative number on failure.
396  *
397  * Attempt to gets inter module "drm" information. If we are first
398  * then register the character device and inter module information.
399  * Try and register, if we fail to register, backout previous work.
400  */
401 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
402                 struct drm_driver *driver)
403 {
404         struct drm_device *dev;
405         int ret;
406
407         DRM_DEBUG("\n");
408
409         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
410         if (!dev)
411                 return -ENOMEM;
412
413         ret = pci_enable_device(pdev);
414         if (ret)
415                 goto err_g1;
416
417         pci_set_master(pdev);
418         if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
419                 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
420                 goto err_g2;
421         }
422
423         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
424                 pci_set_drvdata(pdev, dev);
425                 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
426                 if (ret)
427                         goto err_g2;
428         }
429
430         if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
431                 goto err_g3;
432
433         if (dev->driver->load) {
434                 ret = dev->driver->load(dev, ent->driver_data);
435                 if (ret)
436                         goto err_g4;
437         }
438
439         /* setup the grouping for the legacy output */
440         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
441                 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
442                 if (ret)
443                         goto err_g4;
444         }
445
446         list_add_tail(&dev->driver_item, &driver->device_list);
447
448         DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
449                  driver->name, driver->major, driver->minor, driver->patchlevel,
450                  driver->date, pci_name(pdev), dev->primary->index);
451
452         return 0;
453
454 err_g4:
455         drm_put_minor(&dev->primary);
456 err_g3:
457         if (drm_core_check_feature(dev, DRIVER_MODESET))
458                 drm_put_minor(&dev->control);
459 err_g2:
460         pci_disable_device(pdev);
461 err_g1:
462         kfree(dev);
463         return ret;
464 }
465 EXPORT_SYMBOL(drm_get_dev);
466
467 /**
468  * Put a secondary minor number.
469  *
470  * \param sec_minor - structure to be released
471  * \return always zero
472  *
473  * Cleans up the proc resources. Not legal for this to be the
474  * last minor released.
475  *
476  */
477 int drm_put_minor(struct drm_minor **minor_p)
478 {
479         struct drm_minor *minor = *minor_p;
480
481         DRM_DEBUG("release secondary minor %d\n", minor->index);
482
483         if (minor->type == DRM_MINOR_LEGACY)
484                 drm_proc_cleanup(minor, drm_proc_root);
485 #if defined(CONFIG_DEBUG_FS)
486         drm_debugfs_cleanup(minor);
487 #endif
488
489         drm_sysfs_device_remove(minor);
490
491         idr_remove(&drm_minors_idr, minor->index);
492
493         kfree(minor);
494         *minor_p = NULL;
495         return 0;
496 }
497
498 /**
499  * Called via drm_exit() at module unload time or when pci device is
500  * unplugged.
501  *
502  * Cleans up all DRM device, calling drm_lastclose().
503  *
504  * \sa drm_init
505  */
506 void drm_put_dev(struct drm_device *dev)
507 {
508         struct drm_driver *driver;
509         struct drm_map_list *r_list, *list_temp;
510
511         DRM_DEBUG("\n");
512
513         if (!dev) {
514                 DRM_ERROR("cleanup called no dev\n");
515                 return;
516         }
517         driver = dev->driver;
518
519         drm_lastclose(dev);
520
521         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
522             dev->agp && dev->agp->agp_mtrr >= 0) {
523                 int retval;
524                 retval = mtrr_del(dev->agp->agp_mtrr,
525                                   dev->agp->agp_info.aper_base,
526                                   dev->agp->agp_info.aper_size * 1024 * 1024);
527                 DRM_DEBUG("mtrr_del=%d\n", retval);
528         }
529
530         if (dev->driver->unload)
531                 dev->driver->unload(dev);
532
533         if (drm_core_has_AGP(dev) && dev->agp) {
534                 kfree(dev->agp);
535                 dev->agp = NULL;
536         }
537
538         drm_vblank_cleanup(dev);
539
540         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
541                 drm_rmmap(dev, r_list->map);
542         drm_ht_remove(&dev->map_hash);
543
544         drm_ctxbitmap_cleanup(dev);
545
546         if (drm_core_check_feature(dev, DRIVER_MODESET))
547                 drm_put_minor(&dev->control);
548
549         if (driver->driver_features & DRIVER_GEM)
550                 drm_gem_destroy(dev);
551
552         drm_put_minor(&dev->primary);
553
554         if (dev->devname) {
555                 kfree(dev->devname);
556                 dev->devname = NULL;
557         }
558         kfree(dev);
559 }
560 EXPORT_SYMBOL(drm_put_dev);