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