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