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 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  44 EXPORT_SYMBOL(drm_vblank_offdelay);
  45
  46 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  47 EXPORT_SYMBOL(drm_timestamp_precision);
  48
  49 MODULE_AUTHOR(CORE_AUTHOR);
  50 MODULE_DESCRIPTION(CORE_DESC);
  51 MODULE_LICENSE("GPL and additional rights");
  52 MODULE_PARM_DESC(debug, "Enable debug output");
  53 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
  54 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
  55
  56 module_param_named(debug, drm_debug, int, 0600);
  57 module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
  58 module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
  59
  60 struct idr drm_minors_idr;
  61
  62 struct class *drm_class;
  63 struct proc_dir_entry *drm_proc_root;
  64 struct dentry *drm_debugfs_root;
  65 void drm_ut_debug_printk(unsigned int request_level,
  66                          const char *prefix,
  67                          const char *function_name,
  68                          const char *format, ...)
  69 {
  70         va_list args;
  71
  72         if (drm_debug & request_level) {
  73                 if (function_name)
  74                         printk(KERN_DEBUG "[%s:%s], ", prefix, function_name);
  75                 va_start(args, format);
  76                 vprintk(format, args);
  77                 va_end(args);
  78         }
  79 }
  80 EXPORT_SYMBOL(drm_ut_debug_printk);
  81 static int drm_minor_get_id(struct drm_device *dev, int type)
  82 {
  83         int new_id;
  84         int ret;
  85         int base = 0, limit = 63;
  86
  87         if (type == DRM_MINOR_CONTROL) {
  88                 base += 64;
  89                 limit = base + 127;
  90         } else if (type == DRM_MINOR_RENDER) {
  91                 base += 128;
  92                 limit = base + 255;
  93         }
  94
  95 again:
  96         if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
  97                 DRM_ERROR("Out of memory expanding drawable idr\n");
  98                 return -ENOMEM;
  99         }
 100         mutex_lock(&dev->struct_mutex);
 101         ret = idr_get_new_above(&drm_minors_idr, NULL,
 102                                 base, &new_id);
 103         mutex_unlock(&dev->struct_mutex);
 104         if (ret == -EAGAIN) {
 105                 goto again;
 106         } else if (ret) {
 107                 return ret;
 108         }
 109
 110         if (new_id >= limit) {
 111                 idr_remove(&drm_minors_idr, new_id);
 112                 return -EINVAL;
 113         }
 114         return new_id;
 115 }
 116
 117 struct drm_master *drm_master_create(struct drm_minor *minor)
 118 {
 119         struct drm_master *master;
 120
 121         master = kzalloc(sizeof(*master), GFP_KERNEL);
 122         if (!master)
 123                 return NULL;
 124
 125         kref_init(&master->refcount);
 126         spin_lock_init(&master->lock.spinlock);
 127         init_waitqueue_head(&master->lock.lock_queue);
 128         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
 129         INIT_LIST_HEAD(&master->magicfree);
 130         master->minor = minor;
 131
 132         list_add_tail(&master->head, &minor->master_list);
 133
 134         return master;
 135 }
 136
 137 struct drm_master *drm_master_get(struct drm_master *master)
 138 {
 139         kref_get(&master->refcount);
 140         return master;
 141 }
 142 EXPORT_SYMBOL(drm_master_get);
 143
 144 static void drm_master_destroy(struct kref *kref)
 145 {
 146         struct drm_master *master = container_of(kref, struct drm_master, refcount);
 147         struct drm_magic_entry *pt, *next;
 148         struct drm_device *dev = master->minor->dev;
 149         struct drm_map_list *r_list, *list_temp;
 150
 151         list_del(&master->head);
 152
 153         if (dev->driver->master_destroy)
 154                 dev->driver->master_destroy(dev, master);
 155
 156         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
 157                 if (r_list->master == master) {
 158                         drm_rmmap_locked(dev, r_list->map);
 159                         r_list = NULL;
 160                 }
 161         }
 162
 163         if (master->unique) {
 164                 kfree(master->unique);
 165                 master->unique = NULL;
 166                 master->unique_len = 0;
 167         }
 168
 169         kfree(dev->devname);
 170         dev->devname = NULL;
 171
 172         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 173                 list_del(&pt->head);
 174                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
 175                 kfree(pt);
 176         }
 177
 178         drm_ht_remove(&master->magiclist);
 179
 180         kfree(master);
 181 }
 182
 183 void drm_master_put(struct drm_master **master)
 184 {
 185         kref_put(&(*master)->refcount, drm_master_destroy);
 186         *master = NULL;
 187 }
 188 EXPORT_SYMBOL(drm_master_put);
 189
 190 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 191                         struct drm_file *file_priv)
 192 {
 193         int ret = 0;
 194
 195         if (file_priv->is_master)
 196                 return 0;
 197
 198         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
 199                 return -EINVAL;
 200
 201         if (!file_priv->master)
 202                 return -EINVAL;
 203
 204         if (!file_priv->minor->master &&
 205             file_priv->minor->master != file_priv->master) {
 206                 mutex_lock(&dev->struct_mutex);
 207                 file_priv->minor->master = drm_master_get(file_priv->master);
 208                 file_priv->is_master = 1;
 209                 if (dev->driver->master_set) {
 210                         ret = dev->driver->master_set(dev, file_priv, false);
 211                         if (unlikely(ret != 0)) {
 212                                 file_priv->is_master = 0;
 213                                 drm_master_put(&file_priv->minor->master);
 214                         }
 215                 }
 216                 mutex_unlock(&dev->struct_mutex);
 217         }
 218
 219         return 0;
 220 }
 221
 222 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 223                          struct drm_file *file_priv)
 224 {
 225         if (!file_priv->is_master)
 226                 return -EINVAL;
 227
 228         if (!file_priv->minor->master)
 229                 return -EINVAL;
 230
 231         mutex_lock(&dev->struct_mutex);
 232         if (dev->driver->master_drop)
 233                 dev->driver->master_drop(dev, file_priv, false);
 234         drm_master_put(&file_priv->minor->master);
 235         file_priv->is_master = 0;
 236         mutex_unlock(&dev->struct_mutex);
 237         return 0;
 238 }
 239
 240 int drm_fill_in_dev(struct drm_device *dev,
 241                            const struct pci_device_id *ent,
 242                            struct drm_driver *driver)
 243 {
 244         int retcode;
 245
 246         INIT_LIST_HEAD(&dev->filelist);
 247         INIT_LIST_HEAD(&dev->ctxlist);
 248         INIT_LIST_HEAD(&dev->vmalist);
 249         INIT_LIST_HEAD(&dev->maplist);
 250         INIT_LIST_HEAD(&dev->vblank_event_list);
 251
 252         spin_lock_init(&dev->count_lock);
 253         spin_lock_init(&dev->event_lock);
 254         mutex_init(&dev->struct_mutex);
 255         mutex_init(&dev->ctxlist_mutex);
 256
 257         if (drm_ht_create(&dev->map_hash, 12)) {
 258                 return -ENOMEM;
 259         }
 260
 261         /* the DRM has 6 basic counters */
 262         dev->counters = 6;
 263         dev->types[0] = _DRM_STAT_LOCK;
 264         dev->types[1] = _DRM_STAT_OPENS;
 265         dev->types[2] = _DRM_STAT_CLOSES;
 266         dev->types[3] = _DRM_STAT_IOCTLS;
 267         dev->types[4] = _DRM_STAT_LOCKS;
 268         dev->types[5] = _DRM_STAT_UNLOCKS;
 269
 270         dev->driver = driver;
 271
 272         if (drm_core_has_AGP(dev)) {
 273                 if (drm_device_is_agp(dev))
 274                         dev->agp = drm_agp_init(dev);
 275                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
 276                     && (dev->agp == NULL)) {
 277                         DRM_ERROR("Cannot initialize the agpgart module.\n");
 278                         retcode = -EINVAL;
 279                         goto error_out_unreg;
 280                 }
 281                 if (drm_core_has_MTRR(dev)) {
 282                         if (dev->agp)
 283                                 dev->agp->agp_mtrr =
 284                                     mtrr_add(dev->agp->agp_info.aper_base,
 285                                              dev->agp->agp_info.aper_size *
 286                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
 287                 }
 288         }
 289
 290
 291         retcode = drm_ctxbitmap_init(dev);
 292         if (retcode) {
 293                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 294                 goto error_out_unreg;
 295         }
 296
 297         if (driver->driver_features & DRIVER_GEM) {
 298                 retcode = drm_gem_init(dev);
 299                 if (retcode) {
 300                         DRM_ERROR("Cannot initialize graphics execution "
 301                                   "manager (GEM)\n");
 302                         goto error_out_unreg;
 303                 }
 304         }
 305
 306         return 0;
 307
 308       error_out_unreg:
 309         drm_lastclose(dev);
 310         return retcode;
 311 }
 312
 313
 314 /**
 315  * Get a secondary minor number.
 316  *
 317  * \param dev device data structure
 318  * \param sec-minor structure to hold the assigned minor
 319  * \return negative number on failure.
 320  *
 321  * Search an empty entry and initialize it to the given parameters, and
 322  * create the proc init entry via proc_init(). This routines assigns
 323  * minor numbers to secondary heads of multi-headed cards
 324  */
 325 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
 326 {
 327         struct drm_minor *new_minor;
 328         int ret;
 329         int minor_id;
 330
 331         DRM_DEBUG("\n");
 332
 333         minor_id = drm_minor_get_id(dev, type);
 334         if (minor_id < 0)
 335                 return minor_id;
 336
 337         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
 338         if (!new_minor) {
 339                 ret = -ENOMEM;
 340                 goto err_idr;
 341         }
 342
 343         new_minor->type = type;
 344         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
 345         new_minor->dev = dev;
 346         new_minor->index = minor_id;
 347         INIT_LIST_HEAD(&new_minor->master_list);
 348
 349         idr_replace(&drm_minors_idr, new_minor, minor_id);
 350
 351         if (type == DRM_MINOR_LEGACY) {
 352                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
 353                 if (ret) {
 354                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
 355                         goto err_mem;
 356                 }
 357         } else
 358                 new_minor->proc_root = NULL;
 359
 360 #if defined(CONFIG_DEBUG_FS)
 361         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
 362         if (ret) {
 363                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
 364                 goto err_g2;
 365         }
 366 #endif
 367
 368         ret = drm_sysfs_device_add(new_minor);
 369         if (ret) {
 370                 printk(KERN_ERR
 371                        "DRM: Error sysfs_device_add.\n");
 372                 goto err_g2;
 373         }
 374         *minor = new_minor;
 375
 376         DRM_DEBUG("new minor assigned %d\n", minor_id);
 377         return 0;
 378
 379
 380 err_g2:
 381         if (new_minor->type == DRM_MINOR_LEGACY)
 382                 drm_proc_cleanup(new_minor, drm_proc_root);
 383 err_mem:
 384         kfree(new_minor);
 385 err_idr:
 386         idr_remove(&drm_minors_idr, minor_id);
 387         *minor = NULL;
 388         return ret;
 389 }
 390
 391 /**
 392  * Put a secondary minor number.
 393  *
 394  * \param sec_minor - structure to be released
 395  * \return always zero
 396  *
 397  * Cleans up the proc resources. Not legal for this to be the
 398  * last minor released.
 399  *
 400  */
 401 int drm_put_minor(struct drm_minor **minor_p)
 402 {
 403         struct drm_minor *minor = *minor_p;
 404
 405         DRM_DEBUG("release secondary minor %d\n", minor->index);
 406
 407         if (minor->type == DRM_MINOR_LEGACY)
 408                 drm_proc_cleanup(minor, drm_proc_root);
 409 #if defined(CONFIG_DEBUG_FS)
 410         drm_debugfs_cleanup(minor);
 411 #endif
 412
 413         drm_sysfs_device_remove(minor);
 414
 415         idr_remove(&drm_minors_idr, minor->index);
 416
 417         kfree(minor);
 418         *minor_p = NULL;
 419         return 0;
 420 }
 421
 422 /**
 423  * Called via drm_exit() at module unload time or when pci device is
 424  * unplugged.
 425  *
 426  * Cleans up all DRM device, calling drm_lastclose().
 427  *
 428  * \sa drm_init
 429  */
 430 void drm_put_dev(struct drm_device *dev)
 431 {
 432         struct drm_driver *driver;
 433         struct drm_map_list *r_list, *list_temp;
 434
 435         DRM_DEBUG("\n");
 436
 437         if (!dev) {
 438                 DRM_ERROR("cleanup called no dev\n");
 439                 return;
 440         }
 441         driver = dev->driver;
 442
 443         drm_lastclose(dev);
 444
 445         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
 446             dev->agp && dev->agp->agp_mtrr >= 0) {
 447                 int retval;
 448                 retval = mtrr_del(dev->agp->agp_mtrr,
 449                                   dev->agp->agp_info.aper_base,
 450                                   dev->agp->agp_info.aper_size * 1024 * 1024);
 451                 DRM_DEBUG("mtrr_del=%d\n", retval);
 452         }
 453
 454         if (dev->driver->unload)
 455                 dev->driver->unload(dev);
 456
 457         if (drm_core_has_AGP(dev) && dev->agp) {
 458                 kfree(dev->agp);
 459                 dev->agp = NULL;
 460         }
 461
 462         drm_vblank_cleanup(dev);
 463
 464         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
 465                 drm_rmmap(dev, r_list->map);
 466         drm_ht_remove(&dev->map_hash);
 467
 468         drm_ctxbitmap_cleanup(dev);
 469
 470         if (drm_core_check_feature(dev, DRIVER_MODESET))
 471                 drm_put_minor(&dev->control);
 472
 473         if (driver->driver_features & DRIVER_GEM)
 474                 drm_gem_destroy(dev);
 475
 476         drm_put_minor(&dev->primary);
 477
 478         if (dev->devname) {
 479                 kfree(dev->devname);
 480                 dev->devname = NULL;
 481         }
 482         kfree(dev);
 483 }
 484 EXPORT_SYMBOL(drm_put_dev);