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