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 <drm/drmP.h>
  38 #include <drm/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_rnodes = 0;    /* 1 to enable experimental render nodes API */
  44 EXPORT_SYMBOL(drm_rnodes);
  45
  46 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  47 EXPORT_SYMBOL(drm_vblank_offdelay);
  48
  49 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  50 EXPORT_SYMBOL(drm_timestamp_precision);
  51
  52 /*
  53  * Default to use monotonic timestamps for wait-for-vblank and page-flip
  54  * complete events.
  55  */
  56 unsigned int drm_timestamp_monotonic = 1;
  57
  58 MODULE_AUTHOR(CORE_AUTHOR);
  59 MODULE_DESCRIPTION(CORE_DESC);
  60 MODULE_LICENSE("GPL and additional rights");
  61 MODULE_PARM_DESC(debug, "Enable debug output");
  62 MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API");
  63 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
  64 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
  65 MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
  66
  67 module_param_named(debug, drm_debug, int, 0600);
  68 module_param_named(rnodes, drm_rnodes, int, 0600);
  69 module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
  70 module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
  71 module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
  72
  73 struct idr drm_minors_idr;
  74
  75 struct class *drm_class;
  76 struct dentry *drm_debugfs_root;
  77
  78 int drm_err(const char *func, const char *format, ...)
  79 {
  80         struct va_format vaf;
  81         va_list args;
  82         int r;
  83
  84         va_start(args, format);
  85
  86         vaf.fmt = format;
  87         vaf.va = &args;
  88
  89         r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
  90
  91         va_end(args);
  92
  93         return r;
  94 }
  95 EXPORT_SYMBOL(drm_err);
  96
  97 void drm_ut_debug_printk(unsigned int request_level,
  98                          const char *prefix,
  99                          const char *function_name,
 100                          const char *format, ...)
 101 {
 102         va_list args;
 103
 104         if (drm_debug & request_level) {
 105                 if (function_name)
 106                         printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
 107                 va_start(args, format);
 108                 vprintk(format, args);
 109                 va_end(args);
 110         }
 111 }
 112 EXPORT_SYMBOL(drm_ut_debug_printk);
 113
 114 static int drm_minor_get_id(struct drm_device *dev, int type)
 115 {
 116         int ret;
 117         int base = 0, limit = 63;
 118
 119         if (type == DRM_MINOR_CONTROL) {
 120                 base += 64;
 121                 limit = base + 63;
 122         } else if (type == DRM_MINOR_RENDER) {
 123                 base += 128;
 124                 limit = base + 63;
 125         }
 126
 127         mutex_lock(&dev->struct_mutex);
 128         ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
 129         mutex_unlock(&dev->struct_mutex);
 130
 131         return ret == -ENOSPC ? -EINVAL : ret;
 132 }
 133
 134 struct drm_master *drm_master_create(struct drm_minor *minor)
 135 {
 136         struct drm_master *master;
 137
 138         master = kzalloc(sizeof(*master), GFP_KERNEL);
 139         if (!master)
 140                 return NULL;
 141
 142         kref_init(&master->refcount);
 143         spin_lock_init(&master->lock.spinlock);
 144         init_waitqueue_head(&master->lock.lock_queue);
 145         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
 146         INIT_LIST_HEAD(&master->magicfree);
 147         master->minor = minor;
 148
 149         list_add_tail(&master->head, &minor->master_list);
 150
 151         return master;
 152 }
 153
 154 struct drm_master *drm_master_get(struct drm_master *master)
 155 {
 156         kref_get(&master->refcount);
 157         return master;
 158 }
 159 EXPORT_SYMBOL(drm_master_get);
 160
 161 static void drm_master_destroy(struct kref *kref)
 162 {
 163         struct drm_master *master = container_of(kref, struct drm_master, refcount);
 164         struct drm_magic_entry *pt, *next;
 165         struct drm_device *dev = master->minor->dev;
 166         struct drm_map_list *r_list, *list_temp;
 167
 168         list_del(&master->head);
 169
 170         if (dev->driver->master_destroy)
 171                 dev->driver->master_destroy(dev, master);
 172
 173         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
 174                 if (r_list->master == master) {
 175                         drm_rmmap_locked(dev, r_list->map);
 176                         r_list = NULL;
 177                 }
 178         }
 179
 180         if (master->unique) {
 181                 kfree(master->unique);
 182                 master->unique = NULL;
 183                 master->unique_len = 0;
 184         }
 185
 186         kfree(dev->devname);
 187         dev->devname = NULL;
 188
 189         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 190                 list_del(&pt->head);
 191                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
 192                 kfree(pt);
 193         }
 194
 195         drm_ht_remove(&master->magiclist);
 196
 197         kfree(master);
 198 }
 199
 200 void drm_master_put(struct drm_master **master)
 201 {
 202         kref_put(&(*master)->refcount, drm_master_destroy);
 203         *master = NULL;
 204 }
 205 EXPORT_SYMBOL(drm_master_put);
 206
 207 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 208                         struct drm_file *file_priv)
 209 {
 210         int ret = 0;
 211
 212         if (file_priv->is_master)
 213                 return 0;
 214
 215         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
 216                 return -EINVAL;
 217
 218         if (!file_priv->master)
 219                 return -EINVAL;
 220
 221         if (file_priv->minor->master)
 222                 return -EINVAL;
 223
 224         mutex_lock(&dev->struct_mutex);
 225         file_priv->minor->master = drm_master_get(file_priv->master);
 226         file_priv->is_master = 1;
 227         if (dev->driver->master_set) {
 228                 ret = dev->driver->master_set(dev, file_priv, false);
 229                 if (unlikely(ret != 0)) {
 230                         file_priv->is_master = 0;
 231                         drm_master_put(&file_priv->minor->master);
 232                 }
 233         }
 234         mutex_unlock(&dev->struct_mutex);
 235
 236         return ret;
 237 }
 238
 239 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 240                          struct drm_file *file_priv)
 241 {
 242         if (!file_priv->is_master)
 243                 return -EINVAL;
 244
 245         if (!file_priv->minor->master)
 246                 return -EINVAL;
 247
 248         mutex_lock(&dev->struct_mutex);
 249         if (dev->driver->master_drop)
 250                 dev->driver->master_drop(dev, file_priv, false);
 251         drm_master_put(&file_priv->minor->master);
 252         file_priv->is_master = 0;
 253         mutex_unlock(&dev->struct_mutex);
 254         return 0;
 255 }
 256
 257 int drm_fill_in_dev(struct drm_device *dev,
 258                            const struct pci_device_id *ent,
 259                            struct drm_driver *driver)
 260 {
 261         int retcode;
 262
 263         INIT_LIST_HEAD(&dev->filelist);
 264         INIT_LIST_HEAD(&dev->ctxlist);
 265         INIT_LIST_HEAD(&dev->vmalist);
 266         INIT_LIST_HEAD(&dev->maplist);
 267         INIT_LIST_HEAD(&dev->vblank_event_list);
 268
 269         spin_lock_init(&dev->count_lock);
 270         spin_lock_init(&dev->event_lock);
 271         mutex_init(&dev->struct_mutex);
 272         mutex_init(&dev->ctxlist_mutex);
 273
 274         if (drm_ht_create(&dev->map_hash, 12)) {
 275                 return -ENOMEM;
 276         }
 277
 278         /* the DRM has 6 basic counters */
 279         dev->counters = 6;
 280         dev->types[0] = _DRM_STAT_LOCK;
 281         dev->types[1] = _DRM_STAT_OPENS;
 282         dev->types[2] = _DRM_STAT_CLOSES;
 283         dev->types[3] = _DRM_STAT_IOCTLS;
 284         dev->types[4] = _DRM_STAT_LOCKS;
 285         dev->types[5] = _DRM_STAT_UNLOCKS;
 286
 287         dev->driver = driver;
 288
 289         if (dev->driver->bus->agp_init) {
 290                 retcode = dev->driver->bus->agp_init(dev);
 291                 if (retcode)
 292                         goto error_out_unreg;
 293         }
 294
 295
 296
 297         retcode = drm_ctxbitmap_init(dev);
 298         if (retcode) {
 299                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 300                 goto error_out_unreg;
 301         }
 302
 303         if (driver->driver_features & DRIVER_GEM) {
 304                 retcode = drm_gem_init(dev);
 305                 if (retcode) {
 306                         DRM_ERROR("Cannot initialize graphics execution "
 307                                   "manager (GEM)\n");
 308                         goto error_out_unreg;
 309                 }
 310         }
 311
 312         return 0;
 313
 314       error_out_unreg:
 315         drm_lastclose(dev);
 316         return retcode;
 317 }
 318 EXPORT_SYMBOL(drm_fill_in_dev);
 319
 320
 321 /**
 322  * Get a secondary minor number.
 323  *
 324  * \param dev device data structure
 325  * \param sec-minor structure to hold the assigned minor
 326  * \return negative number on failure.
 327  *
 328  * Search an empty entry and initialize it to the given parameters. This
 329  * routines assigns minor numbers to secondary heads of multi-headed cards
 330  */
 331 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
 332 {
 333         struct drm_minor *new_minor;
 334         int ret;
 335         int minor_id;
 336
 337         DRM_DEBUG("\n");
 338
 339         minor_id = drm_minor_get_id(dev, type);
 340         if (minor_id < 0)
 341                 return minor_id;
 342
 343         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
 344         if (!new_minor) {
 345                 ret = -ENOMEM;
 346                 goto err_idr;
 347         }
 348
 349         new_minor->type = type;
 350         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
 351         new_minor->dev = dev;
 352         new_minor->index = minor_id;
 353         INIT_LIST_HEAD(&new_minor->master_list);
 354
 355         idr_replace(&drm_minors_idr, new_minor, minor_id);
 356
 357 #if defined(CONFIG_DEBUG_FS)
 358         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
 359         if (ret) {
 360                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
 361                 goto err_mem;
 362         }
 363 #endif
 364
 365         ret = drm_sysfs_device_add(new_minor);
 366         if (ret) {
 367                 printk(KERN_ERR
 368                        "DRM: Error sysfs_device_add.\n");
 369                 goto err_debugfs;
 370         }
 371         *minor = new_minor;
 372
 373         DRM_DEBUG("new minor assigned %d\n", minor_id);
 374         return 0;
 375
 376
 377 err_debugfs:
 378 #if defined(CONFIG_DEBUG_FS)
 379         drm_debugfs_cleanup(new_minor);
 380 err_mem:
 381 #endif
 382         kfree(new_minor);
 383 err_idr:
 384         idr_remove(&drm_minors_idr, minor_id);
 385         *minor = NULL;
 386         return ret;
 387 }
 388 EXPORT_SYMBOL(drm_get_minor);
 389
 390 /**
 391  * Put a secondary minor number.
 392  *
 393  * \param sec_minor - structure to be released
 394  * \return always zero
 395  */
 396 int drm_put_minor(struct drm_minor **minor_p)
 397 {
 398         struct drm_minor *minor = *minor_p;
 399
 400         DRM_DEBUG("release secondary minor %d\n", minor->index);
 401
 402 #if defined(CONFIG_DEBUG_FS)
 403         drm_debugfs_cleanup(minor);
 404 #endif
 405
 406         drm_sysfs_device_remove(minor);
 407
 408         idr_remove(&drm_minors_idr, minor->index);
 409
 410         kfree(minor);
 411         *minor_p = NULL;
 412         return 0;
 413 }
 414 EXPORT_SYMBOL(drm_put_minor);
 415
 416 static void drm_unplug_minor(struct drm_minor *minor)
 417 {
 418         drm_sysfs_device_remove(minor);
 419 }
 420
 421 /**
 422  * Called via drm_exit() at module unload time or when pci device is
 423  * unplugged.
 424  *
 425  * Cleans up all DRM device, calling drm_lastclose().
 426  *
 427  */
 428 void drm_put_dev(struct drm_device *dev)
 429 {
 430         struct drm_driver *driver;
 431         struct drm_map_list *r_list, *list_temp;
 432
 433         DRM_DEBUG("\n");
 434
 435         if (!dev) {
 436                 DRM_ERROR("cleanup called no dev\n");
 437                 return;
 438         }
 439         driver = dev->driver;
 440
 441         drm_lastclose(dev);
 442
 443         if (dev->driver->unload)
 444                 dev->driver->unload(dev);
 445
 446         if (dev->driver->bus->agp_destroy)
 447                 dev->driver->bus->agp_destroy(dev);
 448
 449         drm_vblank_cleanup(dev);
 450
 451         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
 452                 drm_rmmap(dev, r_list->map);
 453         drm_ht_remove(&dev->map_hash);
 454
 455         drm_ctxbitmap_cleanup(dev);
 456
 457         if (drm_core_check_feature(dev, DRIVER_MODESET))
 458                 drm_put_minor(&dev->control);
 459
 460         if (dev->render)
 461                 drm_put_minor(&dev->render);
 462
 463         if (driver->driver_features & DRIVER_GEM)
 464                 drm_gem_destroy(dev);
 465
 466         drm_put_minor(&dev->primary);
 467
 468         list_del(&dev->driver_item);
 469         kfree(dev->devname);
 470         kfree(dev);
 471 }
 472 EXPORT_SYMBOL(drm_put_dev);
 473
 474 void drm_unplug_dev(struct drm_device *dev)
 475 {
 476         /* for a USB device */
 477         if (drm_core_check_feature(dev, DRIVER_MODESET))
 478                 drm_unplug_minor(dev->control);
 479         if (dev->render)
 480                 drm_unplug_minor(dev->render);
 481         drm_unplug_minor(dev->primary);
 482
 483         mutex_lock(&drm_global_mutex);
 484
 485         drm_device_set_unplugged(dev);
 486
 487         if (dev->open_count == 0) {
 488                 drm_put_dev(dev);
 489         }
 490         mutex_unlock(&drm_global_mutex);
 491 }
 492 EXPORT_SYMBOL(drm_unplug_dev);