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