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 "drmP.h"
  37 #include "drm_core.h"
  38
  39 unsigned int drm_debug = 0;     /* 1 to enable debug output */
  40 EXPORT_SYMBOL(drm_debug);
  41
  42 MODULE_AUTHOR(CORE_AUTHOR);
  43 MODULE_DESCRIPTION(CORE_DESC);
  44 MODULE_LICENSE("GPL and additional rights");
  45 MODULE_PARM_DESC(debug, "Enable debug output");
  46
  47 module_param_named(debug, drm_debug, int, 0600);
  48
  49 struct idr drm_minors_idr;
  50
  51 struct class *drm_class;
  52 struct proc_dir_entry *drm_proc_root;
  53 struct dentry *drm_debugfs_root;
  54 void drm_ut_debug_printk(unsigned int request_level,
  55                          const char *prefix,
  56                          const char *function_name,
  57                          const char *format, ...)
  58 {
  59         va_list args;
  60
  61         if (drm_debug & request_level) {
  62                 if (function_name)
  63                         printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
  64                 va_start(args, format);
  65                 vprintk(format, args);
  66                 va_end(args);
  67         }
  68 }
  69 EXPORT_SYMBOL(drm_ut_debug_printk);
  70 static int drm_minor_get_id(struct drm_device *dev, int type)
  71 {
  72         int new_id;
  73         int ret;
  74         int base = 0, limit = 63;
  75
  76         if (type == DRM_MINOR_CONTROL) {
  77                 base += 64;
  78                 limit = base + 127;
  79         } else if (type == DRM_MINOR_RENDER) {
  80                 base += 128;
  81                 limit = base + 255;
  82         }
  83
  84 again:
  85         if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
  86                 DRM_ERROR("Out of memory expanding drawable idr\n");
  87                 return -ENOMEM;
  88         }
  89         mutex_lock(&dev->struct_mutex);
  90         ret = idr_get_new_above(&drm_minors_idr, NULL,
  91                                 base, &new_id);
  92         mutex_unlock(&dev->struct_mutex);
  93         if (ret == -EAGAIN) {
  94                 goto again;
  95         } else if (ret) {
  96                 return ret;
  97         }
  98
  99         if (new_id >= limit) {
 100                 idr_remove(&drm_minors_idr, new_id);
 101                 return -EINVAL;
 102         }
 103         return new_id;
 104 }
 105
 106 struct drm_master *drm_master_create(struct drm_minor *minor)
 107 {
 108         struct drm_master *master;
 109
 110         master = kzalloc(sizeof(*master), GFP_KERNEL);
 111         if (!master)
 112                 return NULL;
 113
 114         kref_init(&master->refcount);
 115         spin_lock_init(&master->lock.spinlock);
 116         init_waitqueue_head(&master->lock.lock_queue);
 117         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
 118         INIT_LIST_HEAD(&master->magicfree);
 119         master->minor = minor;
 120
 121         list_add_tail(&master->head, &minor->master_list);
 122
 123         return master;
 124 }
 125
 126 struct drm_master *drm_master_get(struct drm_master *master)
 127 {
 128         kref_get(&master->refcount);
 129         return master;
 130 }
 131 EXPORT_SYMBOL(drm_master_get);
 132
 133 static void drm_master_destroy(struct kref *kref)
 134 {
 135         struct drm_master *master = container_of(kref, struct drm_master, refcount);
 136         struct drm_magic_entry *pt, *next;
 137         struct drm_device *dev = master->minor->dev;
 138         struct drm_map_list *r_list, *list_temp;
 139
 140         list_del(&master->head);
 141
 142         if (dev->driver->master_destroy)
 143                 dev->driver->master_destroy(dev, master);
 144
 145         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
 146                 if (r_list->master == master) {
 147                         drm_rmmap_locked(dev, r_list->map);
 148                         r_list = NULL;
 149                 }
 150         }
 151
 152         if (master->unique) {
 153                 kfree(master->unique);
 154                 master->unique = NULL;
 155                 master->unique_len = 0;
 156         }
 157
 158         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 159                 list_del(&pt->head);
 160                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
 161                 kfree(pt);
 162         }
 163
 164         drm_ht_remove(&master->magiclist);
 165
 166         kfree(master);
 167 }
 168
 169 void drm_master_put(struct drm_master **master)
 170 {
 171         kref_put(&(*master)->refcount, drm_master_destroy);
 172         *master = NULL;
 173 }
 174 EXPORT_SYMBOL(drm_master_put);
 175
 176 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 177                         struct drm_file *file_priv)
 178 {
 179         int ret = 0;
 180
 181         if (file_priv->is_master)
 182                 return 0;
 183
 184         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
 185                 return -EINVAL;
 186
 187         if (!file_priv->master)
 188                 return -EINVAL;
 189
 190         if (!file_priv->minor->master &&
 191             file_priv->minor->master != file_priv->master) {
 192                 mutex_lock(&dev->struct_mutex);
 193                 file_priv->minor->master = drm_master_get(file_priv->master);
 194                 file_priv->is_master = 1;
 195                 if (dev->driver->master_set) {
 196                         ret = dev->driver->master_set(dev, file_priv, false);
 197                         if (unlikely(ret != 0)) {
 198                                 file_priv->is_master = 0;
 199                                 drm_master_put(&file_priv->minor->master);
 200                         }
 201                 }
 202                 mutex_unlock(&dev->struct_mutex);
 203         }
 204
 205         return 0;
 206 }
 207
 208 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 209                          struct drm_file *file_priv)
 210 {
 211         if (!file_priv->is_master)
 212                 return -EINVAL;
 213
 214         if (!file_priv->minor->master)
 215                 return -EINVAL;
 216
 217         mutex_lock(&dev->struct_mutex);
 218         if (dev->driver->master_drop)
 219                 dev->driver->master_drop(dev, file_priv, false);
 220         drm_master_put(&file_priv->minor->master);
 221         file_priv->is_master = 0;
 222         mutex_unlock(&dev->struct_mutex);
 223         return 0;
 224 }
 225
 226 static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
 227                            const struct pci_device_id *ent,
 228                            struct drm_driver *driver)
 229 {
 230         int retcode;
 231
 232         INIT_LIST_HEAD(&dev->filelist);
 233         INIT_LIST_HEAD(&dev->ctxlist);
 234         INIT_LIST_HEAD(&dev->vmalist);
 235         INIT_LIST_HEAD(&dev->maplist);
 236         INIT_LIST_HEAD(&dev->vblank_event_list);
 237
 238         spin_lock_init(&dev->count_lock);
 239         spin_lock_init(&dev->drw_lock);
 240         spin_lock_init(&dev->event_lock);
 241         init_timer(&dev->timer);
 242         mutex_init(&dev->struct_mutex);
 243         mutex_init(&dev->ctxlist_mutex);
 244
 245         idr_init(&dev->drw_idr);
 246
 247         dev->pdev = pdev;
 248         dev->pci_device = pdev->device;
 249         dev->pci_vendor = pdev->vendor;
 250
 251 #ifdef __alpha__
 252         dev->hose = pdev->sysdata;
 253 #endif
 254
 255         if (drm_ht_create(&dev->map_hash, 12)) {
 256                 return -ENOMEM;
 257         }
 258
 259         /* the DRM has 6 basic counters */
 260         dev->counters = 6;
 261         dev->types[0] = _DRM_STAT_LOCK;
 262         dev->types[1] = _DRM_STAT_OPENS;
 263         dev->types[2] = _DRM_STAT_CLOSES;
 264         dev->types[3] = _DRM_STAT_IOCTLS;
 265         dev->types[4] = _DRM_STAT_LOCKS;
 266         dev->types[5] = _DRM_STAT_UNLOCKS;
 267
 268         dev->driver = driver;
 269
 270         if (drm_core_has_AGP(dev)) {
 271                 if (drm_device_is_agp(dev))
 272                         dev->agp = drm_agp_init(dev);
 273                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
 274                     && (dev->agp == NULL)) {
 275                         DRM_ERROR("Cannot initialize the agpgart module.\n");
 276                         retcode = -EINVAL;
 277                         goto error_out_unreg;
 278                 }
 279                 if (drm_core_has_MTRR(dev)) {
 280                         if (dev->agp)
 281                                 dev->agp->agp_mtrr =
 282                                     mtrr_add(dev->agp->agp_info.aper_base,
 283                                              dev->agp->agp_info.aper_size *
 284                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
 285                 }
 286         }
 287
 288
 289         retcode = drm_ctxbitmap_init(dev);
 290         if (retcode) {
 291                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 292                 goto error_out_unreg;
 293         }
 294
 295         if (driver->driver_features & DRIVER_GEM) {
 296                 retcode = drm_gem_init(dev);
 297                 if (retcode) {
 298                         DRM_ERROR("Cannot initialize graphics execution "
 299                                   "manager (GEM)\n");
 300                         goto error_out_unreg;
 301                 }
 302         }
 303
 304         return 0;
 305
 306       error_out_unreg:
 307         drm_lastclose(dev);
 308         return retcode;
 309 }
 310
 311
 312 /**
 313  * Get a secondary minor number.
 314  *
 315  * \param dev device data structure
 316  * \param sec-minor structure to hold the assigned minor
 317  * \return negative number on failure.
 318  *
 319  * Search an empty entry and initialize it to the given parameters, and
 320  * create the proc init entry via proc_init(). This routines assigns
 321  * minor numbers to secondary heads of multi-headed cards
 322  */
 323 static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
 324 {
 325         struct drm_minor *new_minor;
 326         int ret;
 327         int minor_id;
 328
 329         DRM_DEBUG("\n");
 330
 331         minor_id = drm_minor_get_id(dev, type);
 332         if (minor_id < 0)
 333                 return minor_id;
 334
 335         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
 336         if (!new_minor) {
 337                 ret = -ENOMEM;
 338                 goto err_idr;
 339         }
 340
 341         new_minor->type = type;
 342         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
 343         new_minor->dev = dev;
 344         new_minor->index = minor_id;
 345         INIT_LIST_HEAD(&new_minor->master_list);
 346
 347         idr_replace(&drm_minors_idr, new_minor, minor_id);
 348
 349         if (type == DRM_MINOR_LEGACY) {
 350                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
 351                 if (ret) {
 352                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
 353                         goto err_mem;
 354                 }
 355         } else
 356                 new_minor->proc_root = NULL;
 357
 358 #if defined(CONFIG_DEBUG_FS)
 359         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
 360         if (ret) {
 361                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
 362                 goto err_g2;
 363         }
 364 #endif
 365
 366         ret = drm_sysfs_device_add(new_minor);
 367         if (ret) {
 368                 printk(KERN_ERR
 369                        "DRM: Error sysfs_device_add.\n");
 370                 goto err_g2;
 371         }
 372         *minor = new_minor;
 373
 374         DRM_DEBUG("new minor assigned %d\n", minor_id);
 375         return 0;
 376
 377
 378 err_g2:
 379         if (new_minor->type == DRM_MINOR_LEGACY)
 380                 drm_proc_cleanup(new_minor, drm_proc_root);
 381 err_mem:
 382         kfree(new_minor);
 383 err_idr:
 384         idr_remove(&drm_minors_idr, minor_id);
 385         *minor = NULL;
 386         return ret;
 387 }
 388
 389 /**
 390  * Register.
 391  *
 392  * \param pdev - PCI device structure
 393  * \param ent entry from the PCI ID table with device type flags
 394  * \return zero on success or a negative number on failure.
 395  *
 396  * Attempt to gets inter module "drm" information. If we are first
 397  * then register the character device and inter module information.
 398  * Try and register, if we fail to register, backout previous work.
 399  */
 400 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 401                 struct drm_driver *driver)
 402 {
 403         struct drm_device *dev;
 404         int ret;
 405
 406         DRM_DEBUG("\n");
 407
 408         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 409         if (!dev)
 410                 return -ENOMEM;
 411
 412         ret = pci_enable_device(pdev);
 413         if (ret)
 414                 goto err_g1;
 415
 416         pci_set_master(pdev);
 417         if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
 418                 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
 419                 goto err_g2;
 420         }
 421
 422         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 423                 pci_set_drvdata(pdev, dev);
 424                 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
 425                 if (ret)
 426                         goto err_g2;
 427         }
 428
 429         if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
 430                 goto err_g3;
 431
 432         if (dev->driver->load) {
 433                 ret = dev->driver->load(dev, ent->driver_data);
 434                 if (ret)
 435                         goto err_g4;
 436         }
 437
 438         /* setup the grouping for the legacy output */
 439         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 440                 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
 441                 if (ret)
 442                         goto err_g4;
 443         }
 444
 445         list_add_tail(&dev->driver_item, &driver->device_list);
 446
 447         DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
 448                  driver->name, driver->major, driver->minor, driver->patchlevel,
 449                  driver->date, pci_name(pdev), dev->primary->index);
 450
 451         return 0;
 452
 453 err_g4:
 454         drm_put_minor(&dev->primary);
 455 err_g3:
 456         if (drm_core_check_feature(dev, DRIVER_MODESET))
 457                 drm_put_minor(&dev->control);
 458 err_g2:
 459         pci_disable_device(pdev);
 460 err_g1:
 461         kfree(dev);
 462         return ret;
 463 }
 464 EXPORT_SYMBOL(drm_get_dev);
 465
 466 /**
 467  * Put a secondary minor number.
 468  *
 469  * \param sec_minor - structure to be released
 470  * \return always zero
 471  *
 472  * Cleans up the proc resources. Not legal for this to be the
 473  * last minor released.
 474  *
 475  */
 476 int drm_put_minor(struct drm_minor **minor_p)
 477 {
 478         struct drm_minor *minor = *minor_p;
 479
 480         DRM_DEBUG("release secondary minor %d\n", minor->index);
 481
 482         if (minor->type == DRM_MINOR_LEGACY)
 483                 drm_proc_cleanup(minor, drm_proc_root);
 484 #if defined(CONFIG_DEBUG_FS)
 485         drm_debugfs_cleanup(minor);
 486 #endif
 487
 488         drm_sysfs_device_remove(minor);
 489
 490         idr_remove(&drm_minors_idr, minor->index);
 491
 492         kfree(minor);
 493         *minor_p = NULL;
 494         return 0;
 495 }
 496
 497 /**
 498  * Called via drm_exit() at module unload time or when pci device is
 499  * unplugged.
 500  *
 501  * Cleans up all DRM device, calling drm_lastclose().
 502  *
 503  * \sa drm_init
 504  */
 505 void drm_put_dev(struct drm_device *dev)
 506 {
 507         struct drm_driver *driver;
 508         struct drm_map_list *r_list, *list_temp;
 509
 510         DRM_DEBUG("\n");
 511
 512         if (!dev) {
 513                 DRM_ERROR("cleanup called no dev\n");
 514                 return;
 515         }
 516         driver = dev->driver;
 517
 518         drm_vblank_cleanup(dev);
 519
 520         drm_lastclose(dev);
 521
 522         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
 523             dev->agp && dev->agp->agp_mtrr >= 0) {
 524                 int retval;
 525                 retval = mtrr_del(dev->agp->agp_mtrr,
 526                                   dev->agp->agp_info.aper_base,
 527                                   dev->agp->agp_info.aper_size * 1024 * 1024);
 528                 DRM_DEBUG("mtrr_del=%d\n", retval);
 529         }
 530
 531         if (dev->driver->unload)
 532                 dev->driver->unload(dev);
 533
 534         if (drm_core_has_AGP(dev) && dev->agp) {
 535                 kfree(dev->agp);
 536                 dev->agp = NULL;
 537         }
 538
 539         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
 540                 drm_rmmap(dev, r_list->map);
 541         drm_ht_remove(&dev->map_hash);
 542
 543         drm_ctxbitmap_cleanup(dev);
 544
 545         if (drm_core_check_feature(dev, DRIVER_MODESET))
 546                 drm_put_minor(&dev->control);
 547
 548         if (driver->driver_features & DRIVER_GEM)
 549                 drm_gem_destroy(dev);
 550
 551         drm_put_minor(&dev->primary);
 552
 553         if (dev->devname) {
 554                 kfree(dev->devname);
 555                 dev->devname = NULL;
 556         }
 557         kfree(dev);
 558 }
 559 EXPORT_SYMBOL(drm_put_dev);