drm/ttm: Add ttm lock functionality.
[firefly-linux-kernel-4.4.55.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 "drmP.h"
37 #include "drm_core.h"
38
39 unsigned int drm_debug = 0;     /* 1 to enable debug output */
40 EXPORT_SYMBOL(drm_debug);
41
42 MODULE_AUTHOR(CORE_AUTHOR);
43 MODULE_DESCRIPTION(CORE_DESC);
44 MODULE_LICENSE("GPL and additional rights");
45 MODULE_PARM_DESC(debug, "Enable debug output");
46
47 module_param_named(debug, drm_debug, int, 0600);
48
49 struct idr drm_minors_idr;
50
51 struct class *drm_class;
52 struct proc_dir_entry *drm_proc_root;
53 struct dentry *drm_debugfs_root;
54 void drm_ut_debug_printk(unsigned int request_level,
55                          const char *prefix,
56                          const char *function_name,
57                          const char *format, ...)
58 {
59         va_list args;
60
61         if (drm_debug & request_level) {
62                 if (function_name)
63                         printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
64                 va_start(args, format);
65                 vprintk(format, args);
66                 va_end(args);
67         }
68 }
69 EXPORT_SYMBOL(drm_ut_debug_printk);
70 static int drm_minor_get_id(struct drm_device *dev, int type)
71 {
72         int new_id;
73         int ret;
74         int base = 0, limit = 63;
75
76         if (type == DRM_MINOR_CONTROL) {
77                 base += 64;
78                 limit = base + 127;
79         } else if (type == DRM_MINOR_RENDER) {
80                 base += 128;
81                 limit = base + 255;
82         }
83
84 again:
85         if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
86                 DRM_ERROR("Out of memory expanding drawable idr\n");
87                 return -ENOMEM;
88         }
89         mutex_lock(&dev->struct_mutex);
90         ret = idr_get_new_above(&drm_minors_idr, NULL,
91                                 base, &new_id);
92         mutex_unlock(&dev->struct_mutex);
93         if (ret == -EAGAIN) {
94                 goto again;
95         } else if (ret) {
96                 return ret;
97         }
98
99         if (new_id >= limit) {
100                 idr_remove(&drm_minors_idr, new_id);
101                 return -EINVAL;
102         }
103         return new_id;
104 }
105
106 struct drm_master *drm_master_create(struct drm_minor *minor)
107 {
108         struct drm_master *master;
109
110         master = kzalloc(sizeof(*master), GFP_KERNEL);
111         if (!master)
112                 return NULL;
113
114         kref_init(&master->refcount);
115         spin_lock_init(&master->lock.spinlock);
116         init_waitqueue_head(&master->lock.lock_queue);
117         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
118         INIT_LIST_HEAD(&master->magicfree);
119         master->minor = minor;
120
121         list_add_tail(&master->head, &minor->master_list);
122
123         return master;
124 }
125
126 struct drm_master *drm_master_get(struct drm_master *master)
127 {
128         kref_get(&master->refcount);
129         return master;
130 }
131
132 static void drm_master_destroy(struct kref *kref)
133 {
134         struct drm_master *master = container_of(kref, struct drm_master, refcount);
135         struct drm_magic_entry *pt, *next;
136         struct drm_device *dev = master->minor->dev;
137         struct drm_map_list *r_list, *list_temp;
138
139         list_del(&master->head);
140
141         if (dev->driver->master_destroy)
142                 dev->driver->master_destroy(dev, master);
143
144         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
145                 if (r_list->master == master) {
146                         drm_rmmap_locked(dev, r_list->map);
147                         r_list = NULL;
148                 }
149         }
150
151         if (master->unique) {
152                 kfree(master->unique);
153                 master->unique = NULL;
154                 master->unique_len = 0;
155         }
156
157         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
158                 list_del(&pt->head);
159                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
160                 kfree(pt);
161         }
162
163         drm_ht_remove(&master->magiclist);
164
165         kfree(master);
166 }
167
168 void drm_master_put(struct drm_master **master)
169 {
170         kref_put(&(*master)->refcount, drm_master_destroy);
171         *master = NULL;
172 }
173
174 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
175                         struct drm_file *file_priv)
176 {
177         int ret = 0;
178
179         if (file_priv->is_master)
180                 return 0;
181
182         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
183                 return -EINVAL;
184
185         if (!file_priv->master)
186                 return -EINVAL;
187
188         if (!file_priv->minor->master &&
189             file_priv->minor->master != file_priv->master) {
190                 mutex_lock(&dev->struct_mutex);
191                 file_priv->minor->master = drm_master_get(file_priv->master);
192                 file_priv->is_master = 1;
193                 if (dev->driver->master_set) {
194                         ret = dev->driver->master_set(dev, file_priv, false);
195                         if (unlikely(ret != 0)) {
196                                 file_priv->is_master = 0;
197                                 drm_master_put(&file_priv->minor->master);
198                         }
199                 }
200                 mutex_unlock(&dev->struct_mutex);
201         }
202
203         return 0;
204 }
205
206 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
207                          struct drm_file *file_priv)
208 {
209         if (!file_priv->is_master)
210                 return -EINVAL;
211
212         if (!file_priv->minor->master)
213                 return -EINVAL;
214
215         mutex_lock(&dev->struct_mutex);
216         if (dev->driver->master_drop)
217                 dev->driver->master_drop(dev, file_priv, false);
218         drm_master_put(&file_priv->minor->master);
219         file_priv->is_master = 0;
220         mutex_unlock(&dev->struct_mutex);
221         return 0;
222 }
223
224 static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
225                            const struct pci_device_id *ent,
226                            struct drm_driver *driver)
227 {
228         int retcode;
229
230         INIT_LIST_HEAD(&dev->filelist);
231         INIT_LIST_HEAD(&dev->ctxlist);
232         INIT_LIST_HEAD(&dev->vmalist);
233         INIT_LIST_HEAD(&dev->maplist);
234         INIT_LIST_HEAD(&dev->vblank_event_list);
235
236         spin_lock_init(&dev->count_lock);
237         spin_lock_init(&dev->drw_lock);
238         spin_lock_init(&dev->event_lock);
239         init_timer(&dev->timer);
240         mutex_init(&dev->struct_mutex);
241         mutex_init(&dev->ctxlist_mutex);
242
243         idr_init(&dev->drw_idr);
244
245         dev->pdev = pdev;
246         dev->pci_device = pdev->device;
247         dev->pci_vendor = pdev->vendor;
248
249 #ifdef __alpha__
250         dev->hose = pdev->sysdata;
251 #endif
252
253         if (drm_ht_create(&dev->map_hash, 12)) {
254                 return -ENOMEM;
255         }
256
257         /* the DRM has 6 basic counters */
258         dev->counters = 6;
259         dev->types[0] = _DRM_STAT_LOCK;
260         dev->types[1] = _DRM_STAT_OPENS;
261         dev->types[2] = _DRM_STAT_CLOSES;
262         dev->types[3] = _DRM_STAT_IOCTLS;
263         dev->types[4] = _DRM_STAT_LOCKS;
264         dev->types[5] = _DRM_STAT_UNLOCKS;
265
266         dev->driver = driver;
267
268         if (drm_core_has_AGP(dev)) {
269                 if (drm_device_is_agp(dev))
270                         dev->agp = drm_agp_init(dev);
271                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
272                     && (dev->agp == NULL)) {
273                         DRM_ERROR("Cannot initialize the agpgart module.\n");
274                         retcode = -EINVAL;
275                         goto error_out_unreg;
276                 }
277                 if (drm_core_has_MTRR(dev)) {
278                         if (dev->agp)
279                                 dev->agp->agp_mtrr =
280                                     mtrr_add(dev->agp->agp_info.aper_base,
281                                              dev->agp->agp_info.aper_size *
282                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
283                 }
284         }
285
286
287         retcode = drm_ctxbitmap_init(dev);
288         if (retcode) {
289                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
290                 goto error_out_unreg;
291         }
292
293         if (driver->driver_features & DRIVER_GEM) {
294                 retcode = drm_gem_init(dev);
295                 if (retcode) {
296                         DRM_ERROR("Cannot initialize graphics execution "
297                                   "manager (GEM)\n");
298                         goto error_out_unreg;
299                 }
300         }
301
302         return 0;
303
304       error_out_unreg:
305         drm_lastclose(dev);
306         return retcode;
307 }
308
309
310 /**
311  * Get a secondary minor number.
312  *
313  * \param dev device data structure
314  * \param sec-minor structure to hold the assigned minor
315  * \return negative number on failure.
316  *
317  * Search an empty entry and initialize it to the given parameters, and
318  * create the proc init entry via proc_init(). This routines assigns
319  * minor numbers to secondary heads of multi-headed cards
320  */
321 static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
322 {
323         struct drm_minor *new_minor;
324         int ret;
325         int minor_id;
326
327         DRM_DEBUG("\n");
328
329         minor_id = drm_minor_get_id(dev, type);
330         if (minor_id < 0)
331                 return minor_id;
332
333         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
334         if (!new_minor) {
335                 ret = -ENOMEM;
336                 goto err_idr;
337         }
338
339         new_minor->type = type;
340         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
341         new_minor->dev = dev;
342         new_minor->index = minor_id;
343         INIT_LIST_HEAD(&new_minor->master_list);
344
345         idr_replace(&drm_minors_idr, new_minor, minor_id);
346
347         if (type == DRM_MINOR_LEGACY) {
348                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
349                 if (ret) {
350                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
351                         goto err_mem;
352                 }
353         } else
354                 new_minor->proc_root = NULL;
355
356 #if defined(CONFIG_DEBUG_FS)
357         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
358         if (ret) {
359                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
360                 goto err_g2;
361         }
362 #endif
363
364         ret = drm_sysfs_device_add(new_minor);
365         if (ret) {
366                 printk(KERN_ERR
367                        "DRM: Error sysfs_device_add.\n");
368                 goto err_g2;
369         }
370         *minor = new_minor;
371
372         DRM_DEBUG("new minor assigned %d\n", minor_id);
373         return 0;
374
375
376 err_g2:
377         if (new_minor->type == DRM_MINOR_LEGACY)
378                 drm_proc_cleanup(new_minor, drm_proc_root);
379 err_mem:
380         kfree(new_minor);
381 err_idr:
382         idr_remove(&drm_minors_idr, minor_id);
383         *minor = NULL;
384         return ret;
385 }
386
387 /**
388  * Register.
389  *
390  * \param pdev - PCI device structure
391  * \param ent entry from the PCI ID table with device type flags
392  * \return zero on success or a negative number on failure.
393  *
394  * Attempt to gets inter module "drm" information. If we are first
395  * then register the character device and inter module information.
396  * Try and register, if we fail to register, backout previous work.
397  */
398 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
399                 struct drm_driver *driver)
400 {
401         struct drm_device *dev;
402         int ret;
403
404         DRM_DEBUG("\n");
405
406         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
407         if (!dev)
408                 return -ENOMEM;
409
410         ret = pci_enable_device(pdev);
411         if (ret)
412                 goto err_g1;
413
414         pci_set_master(pdev);
415         if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
416                 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
417                 goto err_g2;
418         }
419
420         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
421                 pci_set_drvdata(pdev, dev);
422                 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
423                 if (ret)
424                         goto err_g2;
425         }
426
427         if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
428                 goto err_g3;
429
430         if (dev->driver->load) {
431                 ret = dev->driver->load(dev, ent->driver_data);
432                 if (ret)
433                         goto err_g4;
434         }
435
436         /* setup the grouping for the legacy output */
437         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
438                 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
439                 if (ret)
440                         goto err_g4;
441         }
442
443         list_add_tail(&dev->driver_item, &driver->device_list);
444
445         DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
446                  driver->name, driver->major, driver->minor, driver->patchlevel,
447                  driver->date, pci_name(pdev), dev->primary->index);
448
449         return 0;
450
451 err_g4:
452         drm_put_minor(&dev->primary);
453 err_g3:
454         if (drm_core_check_feature(dev, DRIVER_MODESET))
455                 drm_put_minor(&dev->control);
456 err_g2:
457         pci_disable_device(pdev);
458 err_g1:
459         kfree(dev);
460         return ret;
461 }
462 EXPORT_SYMBOL(drm_get_dev);
463
464 /**
465  * Put a secondary minor number.
466  *
467  * \param sec_minor - structure to be released
468  * \return always zero
469  *
470  * Cleans up the proc resources. Not legal for this to be the
471  * last minor released.
472  *
473  */
474 int drm_put_minor(struct drm_minor **minor_p)
475 {
476         struct drm_minor *minor = *minor_p;
477
478         DRM_DEBUG("release secondary minor %d\n", minor->index);
479
480         if (minor->type == DRM_MINOR_LEGACY)
481                 drm_proc_cleanup(minor, drm_proc_root);
482 #if defined(CONFIG_DEBUG_FS)
483         drm_debugfs_cleanup(minor);
484 #endif
485
486         drm_sysfs_device_remove(minor);
487
488         idr_remove(&drm_minors_idr, minor->index);
489
490         kfree(minor);
491         *minor_p = NULL;
492         return 0;
493 }
494
495 /**
496  * Called via drm_exit() at module unload time or when pci device is
497  * unplugged.
498  *
499  * Cleans up all DRM device, calling drm_lastclose().
500  *
501  * \sa drm_init
502  */
503 void drm_put_dev(struct drm_device *dev)
504 {
505         struct drm_driver *driver;
506         struct drm_map_list *r_list, *list_temp;
507
508         DRM_DEBUG("\n");
509
510         if (!dev) {
511                 DRM_ERROR("cleanup called no dev\n");
512                 return;
513         }
514         driver = dev->driver;
515
516         drm_vblank_cleanup(dev);
517
518         drm_lastclose(dev);
519
520         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
521             dev->agp && dev->agp->agp_mtrr >= 0) {
522                 int retval;
523                 retval = mtrr_del(dev->agp->agp_mtrr,
524                                   dev->agp->agp_info.aper_base,
525                                   dev->agp->agp_info.aper_size * 1024 * 1024);
526                 DRM_DEBUG("mtrr_del=%d\n", retval);
527         }
528
529         if (dev->driver->unload)
530                 dev->driver->unload(dev);
531
532         if (drm_core_has_AGP(dev) && dev->agp) {
533                 kfree(dev->agp);
534                 dev->agp = NULL;
535         }
536
537         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
538                 drm_rmmap(dev, r_list->map);
539         drm_ht_remove(&dev->map_hash);
540
541         drm_ctxbitmap_cleanup(dev);
542
543         if (drm_core_check_feature(dev, DRIVER_MODESET))
544                 drm_put_minor(&dev->control);
545
546         if (driver->driver_features & DRIVER_GEM)
547                 drm_gem_destroy(dev);
548
549         drm_put_minor(&dev->primary);
550
551         if (dev->devname) {
552                 kfree(dev->devname);
553                 dev->devname = NULL;
554         }
555         kfree(dev);
556 }
557 EXPORT_SYMBOL(drm_put_dev);