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->minor->master && file_priv->minor->master != file_priv->master)
 163                 return -EINVAL;
 164
 165         if (!file_priv->master)
 166                 return -EINVAL;
 167
 168         if (!file_priv->minor->master &&
 169             file_priv->minor->master != file_priv->master) {
 170                 mutex_lock(&dev->struct_mutex);
 171                 file_priv->minor->master = drm_master_get(file_priv->master);
 172                 mutex_unlock(&dev->struct_mutex);
 173         }
 174
 175         return 0;
 176 }
 177
 178 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 179                          struct drm_file *file_priv)
 180 {
 181         if (!file_priv->master)
 182                 return -EINVAL;
 183         mutex_lock(&dev->struct_mutex);
 184         drm_master_put(&file_priv->minor->master);
 185         mutex_unlock(&dev->struct_mutex);
 186         return 0;
 187 }
 188
 189 static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
 190                            const struct pci_device_id *ent,
 191                            struct drm_driver *driver)
 192 {
 193         int retcode;
 194
 195         INIT_LIST_HEAD(&dev->filelist);
 196         INIT_LIST_HEAD(&dev->ctxlist);
 197         INIT_LIST_HEAD(&dev->vmalist);
 198         INIT_LIST_HEAD(&dev->maplist);
 199
 200         spin_lock_init(&dev->count_lock);
 201         spin_lock_init(&dev->drw_lock);
 202         init_timer(&dev->timer);
 203         mutex_init(&dev->struct_mutex);
 204         mutex_init(&dev->ctxlist_mutex);
 205
 206         idr_init(&dev->drw_idr);
 207
 208         dev->pdev = pdev;
 209         dev->pci_device = pdev->device;
 210         dev->pci_vendor = pdev->vendor;
 211
 212 #ifdef __alpha__
 213         dev->hose = pdev->sysdata;
 214 #endif
 215
 216         if (drm_ht_create(&dev->map_hash, 12)) {
 217                 return -ENOMEM;
 218         }
 219
 220         /* the DRM has 6 basic counters */
 221         dev->counters = 6;
 222         dev->types[0] = _DRM_STAT_LOCK;
 223         dev->types[1] = _DRM_STAT_OPENS;
 224         dev->types[2] = _DRM_STAT_CLOSES;
 225         dev->types[3] = _DRM_STAT_IOCTLS;
 226         dev->types[4] = _DRM_STAT_LOCKS;
 227         dev->types[5] = _DRM_STAT_UNLOCKS;
 228
 229         dev->driver = driver;
 230
 231         if (drm_core_has_AGP(dev)) {
 232                 if (drm_device_is_agp(dev))
 233                         dev->agp = drm_agp_init(dev);
 234                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP)
 235                     && (dev->agp == NULL)) {
 236                         DRM_ERROR("Cannot initialize the agpgart module.\n");
 237                         retcode = -EINVAL;
 238                         goto error_out_unreg;
 239                 }
 240                 if (drm_core_has_MTRR(dev)) {
 241                         if (dev->agp)
 242                                 dev->agp->agp_mtrr =
 243                                     mtrr_add(dev->agp->agp_info.aper_base,
 244                                              dev->agp->agp_info.aper_size *
 245                                              1024 * 1024, MTRR_TYPE_WRCOMB, 1);
 246                 }
 247         }
 248
 249
 250         retcode = drm_ctxbitmap_init(dev);
 251         if (retcode) {
 252                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 253                 goto error_out_unreg;
 254         }
 255
 256         if (driver->driver_features & DRIVER_GEM) {
 257                 retcode = drm_gem_init(dev);
 258                 if (retcode) {
 259                         DRM_ERROR("Cannot initialize graphics execution "
 260                                   "manager (GEM)\n");
 261                         goto error_out_unreg;
 262                 }
 263         }
 264
 265         return 0;
 266
 267       error_out_unreg:
 268         drm_lastclose(dev);
 269         return retcode;
 270 }
 271
 272
 273 /**
 274  * Get a secondary minor number.
 275  *
 276  * \param dev device data structure
 277  * \param sec-minor structure to hold the assigned minor
 278  * \return negative number on failure.
 279  *
 280  * Search an empty entry and initialize it to the given parameters, and
 281  * create the proc init entry via proc_init(). This routines assigns
 282  * minor numbers to secondary heads of multi-headed cards
 283  */
 284 static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type)
 285 {
 286         struct drm_minor *new_minor;
 287         int ret;
 288         int minor_id;
 289
 290         DRM_DEBUG("\n");
 291
 292         minor_id = drm_minor_get_id(dev, type);
 293         if (minor_id < 0)
 294                 return minor_id;
 295
 296         new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL);
 297         if (!new_minor) {
 298                 ret = -ENOMEM;
 299                 goto err_idr;
 300         }
 301
 302         new_minor->type = type;
 303         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
 304         new_minor->dev = dev;
 305         new_minor->index = minor_id;
 306         INIT_LIST_HEAD(&new_minor->master_list);
 307
 308         idr_replace(&drm_minors_idr, new_minor, minor_id);
 309
 310         if (type == DRM_MINOR_LEGACY) {
 311                 ret = drm_proc_init(new_minor, minor_id, drm_proc_root);
 312                 if (ret) {
 313                         DRM_ERROR("DRM: Failed to initialize /proc/dri.\n");
 314                         goto err_mem;
 315                 }
 316         } else
 317                 new_minor->proc_root = NULL;
 318
 319 #if defined(CONFIG_DEBUG_FS)
 320         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
 321         if (ret) {
 322                 DRM_ERROR("DRM: Failed to initialize /debugfs/dri.\n");
 323                 goto err_g2;
 324         }
 325 #endif
 326
 327         ret = drm_sysfs_device_add(new_minor);
 328         if (ret) {
 329                 printk(KERN_ERR
 330                        "DRM: Error sysfs_device_add.\n");
 331                 goto err_g2;
 332         }
 333         *minor = new_minor;
 334
 335         DRM_DEBUG("new minor assigned %d\n", minor_id);
 336         return 0;
 337
 338
 339 err_g2:
 340         if (new_minor->type == DRM_MINOR_LEGACY)
 341                 drm_proc_cleanup(new_minor, drm_proc_root);
 342 err_mem:
 343         kfree(new_minor);
 344 err_idr:
 345         idr_remove(&drm_minors_idr, minor_id);
 346         *minor = NULL;
 347         return ret;
 348 }
 349
 350 /**
 351  * Register.
 352  *
 353  * \param pdev - PCI device structure
 354  * \param ent entry from the PCI ID table with device type flags
 355  * \return zero on success or a negative number on failure.
 356  *
 357  * Attempt to gets inter module "drm" information. If we are first
 358  * then register the character device and inter module information.
 359  * Try and register, if we fail to register, backout previous work.
 360  */
 361 int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 362                 struct drm_driver *driver)
 363 {
 364         struct drm_device *dev;
 365         int ret;
 366
 367         DRM_DEBUG("\n");
 368
 369         dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
 370         if (!dev)
 371                 return -ENOMEM;
 372
 373         ret = pci_enable_device(pdev);
 374         if (ret)
 375                 goto err_g1;
 376
 377         pci_set_master(pdev);
 378         if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
 379                 printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
 380                 goto err_g2;
 381         }
 382
 383         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 384                 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
 385                 if (ret)
 386                         goto err_g2;
 387         }
 388
 389         if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
 390                 goto err_g3;
 391
 392         if (dev->driver->load) {
 393                 ret = dev->driver->load(dev, ent->driver_data);
 394                 if (ret)
 395                         goto err_g3;
 396         }
 397
 398         /* setup the grouping for the legacy output */
 399         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 400                 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
 401                 if (ret)
 402                         goto err_g3;
 403         }
 404
 405         list_add_tail(&dev->driver_item, &driver->device_list);
 406
 407         DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
 408                  driver->name, driver->major, driver->minor, driver->patchlevel,
 409                  driver->date, dev->primary->index);
 410
 411         return 0;
 412
 413 err_g3:
 414         drm_put_minor(&dev->primary);
 415 err_g2:
 416         pci_disable_device(pdev);
 417 err_g1:
 418         drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
 419         return ret;
 420 }
 421
 422 /**
 423  * Put a device minor number.
 424  *
 425  * \param dev device data structure
 426  * \return always zero
 427  *
 428  * Cleans up the proc resources. If it is the last minor then release the foreign
 429  * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
 430  * unregisters the character device.
 431  */
 432 int drm_put_dev(struct drm_device * dev)
 433 {
 434         DRM_DEBUG("release primary %s\n", dev->driver->pci_driver.name);
 435
 436         if (dev->devname) {
 437                 drm_free(dev->devname, strlen(dev->devname) + 1,
 438                          DRM_MEM_DRIVER);
 439                 dev->devname = NULL;
 440         }
 441         drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
 442         return 0;
 443 }
 444
 445 /**
 446  * Put a secondary minor number.
 447  *
 448  * \param sec_minor - structure to be released
 449  * \return always zero
 450  *
 451  * Cleans up the proc resources. Not legal for this to be the
 452  * last minor released.
 453  *
 454  */
 455 int drm_put_minor(struct drm_minor **minor_p)
 456 {
 457         struct drm_minor *minor = *minor_p;
 458
 459         DRM_DEBUG("release secondary minor %d\n", minor->index);
 460
 461         if (minor->type == DRM_MINOR_LEGACY)
 462                 drm_proc_cleanup(minor, drm_proc_root);
 463 #if defined(CONFIG_DEBUG_FS)
 464         drm_debugfs_cleanup(minor);
 465 #endif
 466
 467         drm_sysfs_device_remove(minor);
 468
 469         idr_remove(&drm_minors_idr, minor->index);
 470
 471         kfree(minor);
 472         *minor_p = NULL;
 473         return 0;
 474 }