drm_stub.c revision b78315f051de8d207bead90470aa216c0617572b
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 39unsigned int drm_debug = 0; /* 1 to enable debug output */ 40EXPORT_SYMBOL(drm_debug); 41 42MODULE_AUTHOR(CORE_AUTHOR); 43MODULE_DESCRIPTION(CORE_DESC); 44MODULE_LICENSE("GPL and additional rights"); 45MODULE_PARM_DESC(debug, "Enable debug output"); 46 47module_param_named(debug, drm_debug, int, 0600); 48 49struct idr drm_minors_idr; 50 51struct class *drm_class; 52struct proc_dir_entry *drm_proc_root; 53struct dentry *drm_debugfs_root; 54void 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} 69EXPORT_SYMBOL(drm_ut_debug_printk); 70static 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 84again: 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 106struct drm_master *drm_master_create(struct drm_minor *minor) 107{ 108 struct drm_master *master; 109 110 master = kzalloc(sizeof(*master), GFP_KERNEL); 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 126struct drm_master *drm_master_get(struct drm_master *master) 127{ 128 kref_get(&master->refcount); 129 return master; 130} 131EXPORT_SYMBOL(drm_master_get); 132 133static void drm_master_destroy(struct kref *kref) 134{ 135 struct drm_master *master = container_of(kref, struct drm_master, refcount); 136 struct drm_magic_entry *pt, *next; 137 struct drm_device *dev = master->minor->dev; 138 struct drm_map_list *r_list, *list_temp; 139 140 list_del(&master->head); 141 142 if (dev->driver->master_destroy) 143 dev->driver->master_destroy(dev, master); 144 145 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { 146 if (r_list->master == master) { 147 drm_rmmap_locked(dev, r_list->map); 148 r_list = NULL; 149 } 150 } 151 152 if (master->unique) { 153 kfree(master->unique); 154 master->unique = NULL; 155 master->unique_len = 0; 156 } 157 158 list_for_each_entry_safe(pt, next, &master->magicfree, head) { 159 list_del(&pt->head); 160 drm_ht_remove_item(&master->magiclist, &pt->hash_item); 161 kfree(pt); 162 } 163 164 drm_ht_remove(&master->magiclist); 165 166 kfree(master); 167} 168 169void drm_master_put(struct drm_master **master) 170{ 171 kref_put(&(*master)->refcount, drm_master_destroy); 172 *master = NULL; 173} 174EXPORT_SYMBOL(drm_master_put); 175 176int drm_setmaster_ioctl(struct drm_device *dev, void *data, 177 struct drm_file *file_priv) 178{ 179 int ret = 0; 180 181 if (file_priv->is_master) 182 return 0; 183 184 if (file_priv->minor->master && file_priv->minor->master != file_priv->master) 185 return -EINVAL; 186 187 if (!file_priv->master) 188 return -EINVAL; 189 190 if (!file_priv->minor->master && 191 file_priv->minor->master != file_priv->master) { 192 mutex_lock(&dev->struct_mutex); 193 file_priv->minor->master = drm_master_get(file_priv->master); 194 file_priv->is_master = 1; 195 if (dev->driver->master_set) { 196 ret = dev->driver->master_set(dev, file_priv, false); 197 if (unlikely(ret != 0)) { 198 file_priv->is_master = 0; 199 drm_master_put(&file_priv->minor->master); 200 } 201 } 202 mutex_unlock(&dev->struct_mutex); 203 } 204 205 return 0; 206} 207 208int drm_dropmaster_ioctl(struct drm_device *dev, void *data, 209 struct drm_file *file_priv) 210{ 211 if (!file_priv->is_master) 212 return -EINVAL; 213 214 if (!file_priv->minor->master) 215 return -EINVAL; 216 217 mutex_lock(&dev->struct_mutex); 218 if (dev->driver->master_drop) 219 dev->driver->master_drop(dev, file_priv, false); 220 drm_master_put(&file_priv->minor->master); 221 file_priv->is_master = 0; 222 mutex_unlock(&dev->struct_mutex); 223 return 0; 224} 225 226static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev, 227 const struct pci_device_id *ent, 228 struct drm_driver *driver) 229{ 230 int retcode; 231 232 INIT_LIST_HEAD(&dev->filelist); 233 INIT_LIST_HEAD(&dev->ctxlist); 234 INIT_LIST_HEAD(&dev->vmalist); 235 INIT_LIST_HEAD(&dev->maplist); 236 INIT_LIST_HEAD(&dev->vblank_event_list); 237 238 spin_lock_init(&dev->count_lock); 239 spin_lock_init(&dev->drw_lock); 240 spin_lock_init(&dev->event_lock); 241 init_timer(&dev->timer); 242 mutex_init(&dev->struct_mutex); 243 mutex_init(&dev->ctxlist_mutex); 244 245 idr_init(&dev->drw_idr); 246 247 dev->pdev = pdev; 248 dev->pci_device = pdev->device; 249 dev->pci_vendor = pdev->vendor; 250 251#ifdef __alpha__ 252 dev->hose = pdev->sysdata; 253#endif 254 255 if (drm_ht_create(&dev->map_hash, 12)) { 256 return -ENOMEM; 257 } 258 259 /* the DRM has 6 basic counters */ 260 dev->counters = 6; 261 dev->types[0] = _DRM_STAT_LOCK; 262 dev->types[1] = _DRM_STAT_OPENS; 263 dev->types[2] = _DRM_STAT_CLOSES; 264 dev->types[3] = _DRM_STAT_IOCTLS; 265 dev->types[4] = _DRM_STAT_LOCKS; 266 dev->types[5] = _DRM_STAT_UNLOCKS; 267 268 dev->driver = driver; 269 270 if (drm_core_has_AGP(dev)) { 271 if (drm_device_is_agp(dev)) 272 dev->agp = drm_agp_init(dev); 273 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) 274 && (dev->agp == NULL)) { 275 DRM_ERROR("Cannot initialize the agpgart module.\n"); 276 retcode = -EINVAL; 277 goto error_out_unreg; 278 } 279 if (drm_core_has_MTRR(dev)) { 280 if (dev->agp) 281 dev->agp->agp_mtrr = 282 mtrr_add(dev->agp->agp_info.aper_base, 283 dev->agp->agp_info.aper_size * 284 1024 * 1024, MTRR_TYPE_WRCOMB, 1); 285 } 286 } 287 288 289 retcode = drm_ctxbitmap_init(dev); 290 if (retcode) { 291 DRM_ERROR("Cannot allocate memory for context bitmap.\n"); 292 goto error_out_unreg; 293 } 294 295 if (driver->driver_features & DRIVER_GEM) { 296 retcode = drm_gem_init(dev); 297 if (retcode) { 298 DRM_ERROR("Cannot initialize graphics execution " 299 "manager (GEM)\n"); 300 goto error_out_unreg; 301 } 302 } 303 304 return 0; 305 306 error_out_unreg: 307 drm_lastclose(dev); 308 return retcode; 309} 310 311 312/** 313 * Get a secondary minor number. 314 * 315 * \param dev device data structure 316 * \param sec-minor structure to hold the assigned minor 317 * \return negative number on failure. 318 * 319 * Search an empty entry and initialize it to the given parameters, and 320 * create the proc init entry via proc_init(). This routines assigns 321 * minor numbers to secondary heads of multi-headed cards 322 */ 323static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) 324{ 325 struct drm_minor *new_minor; 326 int ret; 327 int minor_id; 328 329 DRM_DEBUG("\n"); 330 331 minor_id = drm_minor_get_id(dev, type); 332 if (minor_id < 0) 333 return minor_id; 334 335 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL); 336 if (!new_minor) { 337 ret = -ENOMEM; 338 goto err_idr; 339 } 340 341 new_minor->type = type; 342 new_minor->device = MKDEV(DRM_MAJOR, minor_id); 343 new_minor->dev = dev; 344 new_minor->index = minor_id; 345 INIT_LIST_HEAD(&new_minor->master_list); 346 347 idr_replace(&drm_minors_idr, new_minor, minor_id); 348 349 if (type == DRM_MINOR_LEGACY) { 350 ret = drm_proc_init(new_minor, minor_id, drm_proc_root); 351 if (ret) { 352 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n"); 353 goto err_mem; 354 } 355 } else 356 new_minor->proc_root = NULL; 357 358#if defined(CONFIG_DEBUG_FS) 359 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); 360 if (ret) { 361 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n"); 362 goto err_g2; 363 } 364#endif 365 366 ret = drm_sysfs_device_add(new_minor); 367 if (ret) { 368 printk(KERN_ERR 369 "DRM: Error sysfs_device_add.\n"); 370 goto err_g2; 371 } 372 *minor = new_minor; 373 374 DRM_DEBUG("new minor assigned %d\n", minor_id); 375 return 0; 376 377 378err_g2: 379 if (new_minor->type == DRM_MINOR_LEGACY) 380 drm_proc_cleanup(new_minor, drm_proc_root); 381err_mem: 382 kfree(new_minor); 383err_idr: 384 idr_remove(&drm_minors_idr, minor_id); 385 *minor = NULL; 386 return ret; 387} 388 389/** 390 * Register. 391 * 392 * \param pdev - PCI device structure 393 * \param ent entry from the PCI ID table with device type flags 394 * \return zero on success or a negative number on failure. 395 * 396 * Attempt to gets inter module "drm" information. If we are first 397 * then register the character device and inter module information. 398 * Try and register, if we fail to register, backout previous work. 399 */ 400int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent, 401 struct drm_driver *driver) 402{ 403 struct drm_device *dev; 404 int ret; 405 406 DRM_DEBUG("\n"); 407 408 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 409 if (!dev) 410 return -ENOMEM; 411 412 ret = pci_enable_device(pdev); 413 if (ret) 414 goto err_g1; 415 416 pci_set_master(pdev); 417 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) { 418 printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); 419 goto err_g2; 420 } 421 422 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 423 pci_set_drvdata(pdev, dev); 424 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); 425 if (ret) 426 goto err_g2; 427 } 428 429 if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY))) 430 goto err_g3; 431 432 if (dev->driver->load) { 433 ret = dev->driver->load(dev, ent->driver_data); 434 if (ret) 435 goto err_g4; 436 } 437 438 /* setup the grouping for the legacy output */ 439 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 440 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 441 if (ret) 442 goto err_g4; 443 } 444 445 list_add_tail(&dev->driver_item, &driver->device_list); 446 447 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n", 448 driver->name, driver->major, driver->minor, driver->patchlevel, 449 driver->date, pci_name(pdev), dev->primary->index); 450 451 return 0; 452 453err_g4: 454 drm_put_minor(&dev->primary); 455err_g3: 456 if (drm_core_check_feature(dev, DRIVER_MODESET)) 457 drm_put_minor(&dev->control); 458err_g2: 459 pci_disable_device(pdev); 460err_g1: 461 kfree(dev); 462 return ret; 463} 464EXPORT_SYMBOL(drm_get_dev); 465 466/** 467 * Put a secondary minor number. 468 * 469 * \param sec_minor - structure to be released 470 * \return always zero 471 * 472 * Cleans up the proc resources. Not legal for this to be the 473 * last minor released. 474 * 475 */ 476int drm_put_minor(struct drm_minor **minor_p) 477{ 478 struct drm_minor *minor = *minor_p; 479 480 DRM_DEBUG("release secondary minor %d\n", minor->index); 481 482 if (minor->type == DRM_MINOR_LEGACY) 483 drm_proc_cleanup(minor, drm_proc_root); 484#if defined(CONFIG_DEBUG_FS) 485 drm_debugfs_cleanup(minor); 486#endif 487 488 drm_sysfs_device_remove(minor); 489 490 idr_remove(&drm_minors_idr, minor->index); 491 492 kfree(minor); 493 *minor_p = NULL; 494 return 0; 495} 496 497/** 498 * Called via drm_exit() at module unload time or when pci device is 499 * unplugged. 500 * 501 * Cleans up all DRM device, calling drm_lastclose(). 502 * 503 * \sa drm_init 504 */ 505void drm_put_dev(struct drm_device *dev) 506{ 507 struct drm_driver *driver; 508 struct drm_map_list *r_list, *list_temp; 509 510 DRM_DEBUG("\n"); 511 512 if (!dev) { 513 DRM_ERROR("cleanup called no dev\n"); 514 return; 515 } 516 driver = dev->driver; 517 518 drm_lastclose(dev); 519 520 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && 521 dev->agp && dev->agp->agp_mtrr >= 0) { 522 int retval; 523 retval = mtrr_del(dev->agp->agp_mtrr, 524 dev->agp->agp_info.aper_base, 525 dev->agp->agp_info.aper_size * 1024 * 1024); 526 DRM_DEBUG("mtrr_del=%d\n", retval); 527 } 528 529 if (dev->driver->unload) 530 dev->driver->unload(dev); 531 532 if (drm_core_has_AGP(dev) && dev->agp) { 533 kfree(dev->agp); 534 dev->agp = NULL; 535 } 536 537 drm_vblank_cleanup(dev); 538 539 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) 540 drm_rmmap(dev, r_list->map); 541 drm_ht_remove(&dev->map_hash); 542 543 drm_ctxbitmap_cleanup(dev); 544 545 if (drm_core_check_feature(dev, DRIVER_MODESET)) 546 drm_put_minor(&dev->control); 547 548 if (driver->driver_features & DRIVER_GEM) 549 drm_gem_destroy(dev); 550 551 drm_put_minor(&dev->primary); 552 553 if (dev->devname) { 554 kfree(dev->devname); 555 dev->devname = NULL; 556 } 557 kfree(dev); 558} 559EXPORT_SYMBOL(drm_put_dev); 560