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