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