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