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         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 160                 list_del(&pt->head);
 161                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
 162                 kfree(pt);
 163         }
 164
 165         drm_ht_remove(&master->magiclist);
 166
 167         kfree(master);
 168 }
 169
 170 void drm_master_put(struct drm_master **master)
 171 {
 172         kref_put(&(*master)->refcount, drm_master_destroy);
 173         *master = NULL;
 174 }
 175 EXPORT_SYMBOL(drm_master_put);
 176
 177 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 178                         struct drm_file *file_priv)
 179 {
 180         int ret = 0;
 181
 182         if (file_priv->is_master)
 183                 return 0;
 184
 185         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
 186                 return -EINVAL;
 187
 188         if (!file_priv->master)
 189                 return -EINVAL;
 190
 191         if (!file_priv->minor->master &&
 192             file_priv->minor->master != file_priv->master) {
 193                 mutex_lock(&dev->struct_mutex);
 194                 file_priv->minor->master = drm_master_get(file_priv->master);
 195                 file_priv->is_master = 1;
 196                 if (dev->driver->master_set) {
 197                         ret = dev->driver->master_set(dev, file_priv, false);
 198                         if (unlikely(ret != 0)) {
 199                                 file_priv->is_master = 0;
 200                                 drm_master_put(&file_priv->minor->master);
 201                         }
 202                 }
 203                 mutex_unlock(&dev->struct_mutex);
 204         }
 205
 206         return 0;
 207 }
 208
 209 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 210                          struct drm_file *file_priv)
 211 {
 212         if (!file_priv->is_master)
 213                 return -EINVAL;
 214
 215         if (!file_priv->minor->master)
 216                 return -EINVAL;
 217
 218         mutex_lock(&dev->struct_mutex);
 219         if (dev->driver->master_drop)
 220                 dev->driver->master_drop(dev, file_priv, false);
 221         drm_master_put(&file_priv->minor->master);
 222         file_priv->is_master = 0;
 223         mutex_unlock(&dev->struct_mutex);
 224         return 0;
 225 }
 226
 227 static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
 228                            const struct pci_device_id *ent,
 229                            struct drm_driver *driver)
 230 {
 231         int retcode;
 232
 233         INIT_LIST_HEAD(&dev->filelist);
 234         INIT_LIST_HEAD(&dev->ctxlist);
 235         INIT_LIST_HEAD(&dev->vmalist);
 236         INIT_LIST_HEAD(&dev->maplist);
 237         INIT_LIST_HEAD(&dev->vblank_event_list);
 238
 239         spin_lock_init(&dev->count_lock);
 240         spin_lock_init(&dev->drw_lock);
 241         spin_lock_init(&dev->event_lock);
 242         init_timer(&dev->timer);
 243         mutex_init(&dev->struct_mutex);
 244         mutex_init(&dev->ctxlist_mutex);
 245
 246         idr_init(&dev->drw_idr);
 247
 248         dev->pdev = pdev;
 249         dev->pci_device = pdev->device;
 250         dev->pci_vendor = pdev->vendor;
 251
 252 #ifdef __alpha__
 253         dev->hose = pdev->sysdata;
 254 #endif
 255
 256         if (drm_ht_create(&dev->map_hash, 12)) {
 257                 return -ENOMEM;
 258         }
 259
 260         /* the DRM has 6 basic counters */
 261         dev->counters = 6;
 262         dev->types[0] = _DRM_STAT_LOCK;
 263         dev->types[1] = _DRM_STAT_OPENS;
 264         dev->types[2] = _DRM_STAT_CLOSES;
 265         dev->types[3] = _DRM_STAT_IOCTLS;
 266         dev->types[4] = _DRM_STAT_LOCKS;
 267         dev->types[5] = _DRM_STAT_UNLOCKS;
 268
 269         dev->driver = driver;
 270
 271         if (drm_core_has_AGP(dev)) {
 272                 if (drm_device_is_agp(dev))
 273                         dev->agp = drm_agp_init(dev);
 274                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
 275                     && (dev->agp == NULL)) {
 276                         DRM_ERROR("Cannot initialize the agpgart module.\n");
 277                         retcode = -EINVAL;
 278                         goto error_out_unreg;
 279                 }
 280                 if (drm_core_has_MTRR(dev)) {
 281                         if (dev->agp)
 282                                 dev->agp->agp_mtrr =
 283                                     mtrr_add(dev->agp->agp_info.aper_base,
 284                                              dev->agp->agp_info.aper_size *
 285                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
 286                 }
 287         }
 288
 289
 290         retcode = drm_ctxbitmap_init(dev);
 291         if (retcode) {
 292                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 293                 goto error_out_unreg;
 294         }
 295
 296         if (driver->driver_features & DRIVER_GEM) {
 297                 retcode = drm_gem_init(dev);
 298                 if (retcode) {
 299                         DRM_ERROR("Cannot initialize graphics execution "
 300                                   "manager (GEM)\n");
 301                         goto error_out_unreg;
 302                 }
 303         }
 304
 305         return 0;
 306
 307       error_out_unreg:
 308         drm_lastclose(dev);
 309         return retcode;
 310 }
 311
 312
 313 /**
 314  * Get a secondary minor number.
 315  *
 316  * \param dev device data structure
 317  * \param sec-minor structure to hold the assigned minor
 318  * \return negative number on failure.
 319  *
 320  * Search an empty entry and initialize it to the given parameters, and
 321  * create the proc init entry via proc_init(). This routines assigns
 322  * minor numbers to secondary heads of multi-headed cards
 323  */
 324 static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
 325 {
 326         struct drm_minor *new_minor;
 327         int ret;
 328         int minor_id;
 329
 330         DRM_DEBUG("\n");
 331
 332         minor_id = drm_minor_get_id(dev, type);
 333         if (minor_id < 0)
 334                 return minor_id;
 335
 336         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
 337         if (!new_minor) {
 338                 ret = -ENOMEM;
 339                 goto err_idr;
 340         }
 341
 342         new_minor->type = type;
 343         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
 344         new_minor->dev = dev;
 345         new_minor->index = minor_id;
 346         INIT_LIST_HEAD(&new_minor->master_list);
 347
 348         idr_replace(&drm_minors_idr, new_minor, minor_id);
 349
 350         if (type == DRM_MINOR_LEGACY) {
 351                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
 352                 if (ret) {
 353                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
 354                         goto err_mem;
 355                 }
 356         } else
 357                 new_minor->proc_root = NULL;
 358
 359 #if defined(CONFIG_DEBUG_FS)
 360         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
 361         if (ret) {
 362                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
 363                 goto err_g2;
 364         }
 365 #endif
 366
 367         ret = drm_sysfs_device_add(new_minor);
 368         if (ret) {
 369                 printk(KERN_ERR
 370                        "DRM: Error sysfs_device_add.\n");
 371                 goto err_g2;
 372         }
 373         *minor = new_minor;
 374
 375         DRM_DEBUG("new minor assigned %d\n", minor_id);
 376         return 0;
 377
 378
 379 err_g2:
 380         if (new_minor->type == DRM_MINOR_LEGACY)
 381                 drm_proc_cleanup(new_minor, drm_proc_root);
 382 err_mem:
 383         kfree(new_minor);
 384 err_idr:
 385         idr_remove(&drm_minors_idr, minor_id);
 386         *minor = NULL;
 387         return ret;
 388 }
 389
 390 /**
 391  * Register.
 392  *
 393  * \param pdev - PCI device structure
 394  * \param ent entry from the PCI ID table with device type flags
 395  * \return zero on success or a negative number on failure.
 396  *
 397  * Attempt to gets inter module "drm" information. If we are first
 398  * then register the character device and inter module information.
 399  * Try and register, if we fail to register, backout previous work.
 400  */
 401 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 402                 struct drm_driver *driver)
 403 {
 404         struct drm_device *dev;
 405         int ret;
 406
 407         DRM_DEBUG("\n");
 408
 409         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 410         if (!dev)
 411                 return -ENOMEM;
 412
 413         ret = pci_enable_device(pdev);
 414         if (ret)
 415                 goto err_g1;
 416
 417         pci_set_master(pdev);
 418         if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
 419                 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
 420                 goto err_g2;
 421         }
 422
 423         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 424                 pci_set_drvdata(pdev, dev);
 425                 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
 426                 if (ret)
 427                         goto err_g2;
 428         }
 429
 430         if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
 431                 goto err_g3;
 432
 433         if (dev->driver->load) {
 434                 ret = dev->driver->load(dev, ent->driver_data);
 435                 if (ret)
 436                         goto err_g4;
 437         }
 438
 439         /* setup the grouping for the legacy output */
 440         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 441                 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
 442                 if (ret)
 443                         goto err_g4;
 444         }
 445
 446         list_add_tail(&dev->driver_item, &driver->device_list);
 447
 448         DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
 449                  driver->name, driver->major, driver->minor, driver->patchlevel,
 450                  driver->date, pci_name(pdev), dev->primary->index);
 451
 452         return 0;
 453
 454 err_g4:
 455         drm_put_minor(&dev->primary);
 456 err_g3:
 457         if (drm_core_check_feature(dev, DRIVER_MODESET))
 458                 drm_put_minor(&dev->control);
 459 err_g2:
 460         pci_disable_device(pdev);
 461 err_g1:
 462         kfree(dev);
 463         return ret;
 464 }
 465 EXPORT_SYMBOL(drm_get_dev);
 466
 467 /**
 468  * Put a secondary minor number.
 469  *
 470  * \param sec_minor - structure to be released
 471  * \return always zero
 472  *
 473  * Cleans up the proc resources. Not legal for this to be the
 474  * last minor released.
 475  *
 476  */
 477 int drm_put_minor(struct drm_minor **minor_p)
 478 {
 479         struct drm_minor *minor = *minor_p;
 480
 481         DRM_DEBUG("release secondary minor %d\n", minor->index);
 482
 483         if (minor->type == DRM_MINOR_LEGACY)
 484                 drm_proc_cleanup(minor, drm_proc_root);
 485 #if defined(CONFIG_DEBUG_FS)
 486         drm_debugfs_cleanup(minor);
 487 #endif
 488
 489         drm_sysfs_device_remove(minor);
 490
 491         idr_remove(&drm_minors_idr, minor->index);
 492
 493         kfree(minor);
 494         *minor_p = NULL;
 495         return 0;
 496 }
 497
 498 /**
 499  * Called via drm_exit() at module unload time or when pci device is
 500  * unplugged.
 501  *
 502  * Cleans up all DRM device, calling drm_lastclose().
 503  *
 504  * \sa drm_init
 505  */
 506 void drm_put_dev(struct drm_device *dev)
 507 {
 508         struct drm_driver *driver;
 509         struct drm_map_list *r_list, *list_temp;
 510
 511         DRM_DEBUG("\n");
 512
 513         if (!dev) {
 514                 DRM_ERROR("cleanup called no dev\n");
 515                 return;
 516         }
 517         driver = dev->driver;
 518
 519         drm_vblank_cleanup(dev);
 520
 521         drm_lastclose(dev);
 522
 523         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
 524             dev->agp && dev->agp->agp_mtrr >= 0) {
 525                 int retval;
 526                 retval = mtrr_del(dev->agp->agp_mtrr,
 527                                   dev->agp->agp_info.aper_base,
 528                                   dev->agp->agp_info.aper_size * 1024 * 1024);
 529                 DRM_DEBUG("mtrr_del=%d\n", retval);
 530         }
 531
 532         if (dev->driver->unload)
 533                 dev->driver->unload(dev);
 534
 535         if (drm_core_has_AGP(dev) && dev->agp) {
 536                 kfree(dev->agp);
 537                 dev->agp = NULL;
 538         }
 539
 540         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
 541                 drm_rmmap(dev, r_list->map);
 542         drm_ht_remove(&dev->map_hash);
 543
 544         drm_ctxbitmap_cleanup(dev);
 545
 546         if (drm_core_check_feature(dev, DRIVER_MODESET))
 547                 drm_put_minor(&dev->control);
 548
 549         if (driver->driver_features & DRIVER_GEM)
 550                 drm_gem_destroy(dev);
 551
 552         drm_put_minor(&dev->primary);
 553
 554         if (dev->devname) {
 555                 kfree(dev->devname);
 556                 dev->devname = NULL;
 557         }
 558         kfree(dev);
 559 }
 560 EXPORT_SYMBOL(drm_put_dev);