drm_stub.c revision 30ddbd94401a132f4d932775d1902b3c9a8c41b5
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; 54 55static 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 69again: 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 91struct 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 111struct drm_master *drm_master_get(struct drm_master *master) 112{ 113 kref_get(&master->refcount); 114 return master; 115} 116 117static 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 153void drm_master_put(struct drm_master **master) 154{ 155 kref_put(&(*master)->refcount, drm_master_destroy); 156 *master = NULL; 157} 158 159int drm_setmaster_ioctl(struct drm_device *dev, void *data, 160 struct drm_file *file_priv) 161{ 162 if (file_priv->is_master) 163 return 0; 164 165 if (file_priv->minor->master && file_priv->minor->master != file_priv->master) 166 return -EINVAL; 167 168 if (!file_priv->master) 169 return -EINVAL; 170 171 if (!file_priv->minor->master && 172 file_priv->minor->master != file_priv->master) { 173 mutex_lock(&dev->struct_mutex); 174 file_priv->minor->master = drm_master_get(file_priv->master); 175 file_priv->is_master = 1; 176 mutex_unlock(&dev->struct_mutex); 177 } 178 179 return 0; 180} 181 182int drm_dropmaster_ioctl(struct drm_device *dev, void *data, 183 struct drm_file *file_priv) 184{ 185 if (!file_priv->is_master) 186 return -EINVAL; 187 188 if (!file_priv->minor->master) 189 return -EINVAL; 190 191 mutex_lock(&dev->struct_mutex); 192 drm_master_put(&file_priv->minor->master); 193 file_priv->is_master = 0; 194 mutex_unlock(&dev->struct_mutex); 195 return 0; 196} 197 198static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev, 199 const struct pci_device_id *ent, 200 struct drm_driver *driver) 201{ 202 int retcode; 203 204 INIT_LIST_HEAD(&dev->filelist); 205 INIT_LIST_HEAD(&dev->ctxlist); 206 INIT_LIST_HEAD(&dev->vmalist); 207 INIT_LIST_HEAD(&dev->maplist); 208 209 spin_lock_init(&dev->count_lock); 210 spin_lock_init(&dev->drw_lock); 211 init_timer(&dev->timer); 212 mutex_init(&dev->struct_mutex); 213 mutex_init(&dev->ctxlist_mutex); 214 215 idr_init(&dev->drw_idr); 216 217 dev->pdev = pdev; 218 dev->pci_device = pdev->device; 219 dev->pci_vendor = pdev->vendor; 220 221#ifdef __alpha__ 222 dev->hose = pdev->sysdata; 223#endif 224 225 if (drm_ht_create(&dev->map_hash, 12)) { 226 return -ENOMEM; 227 } 228 229 /* the DRM has 6 basic counters */ 230 dev->counters = 6; 231 dev->types[0] = _DRM_STAT_LOCK; 232 dev->types[1] = _DRM_STAT_OPENS; 233 dev->types[2] = _DRM_STAT_CLOSES; 234 dev->types[3] = _DRM_STAT_IOCTLS; 235 dev->types[4] = _DRM_STAT_LOCKS; 236 dev->types[5] = _DRM_STAT_UNLOCKS; 237 238 dev->driver = driver; 239 240 if (drm_core_has_AGP(dev)) { 241 if (drm_device_is_agp(dev)) 242 dev->agp = drm_agp_init(dev); 243 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) 244 && (dev->agp == NULL)) { 245 DRM_ERROR("Cannot initialize the agpgart module.\n"); 246 retcode = -EINVAL; 247 goto error_out_unreg; 248 } 249 if (drm_core_has_MTRR(dev)) { 250 if (dev->agp) 251 dev->agp->agp_mtrr = 252 mtrr_add(dev->agp->agp_info.aper_base, 253 dev->agp->agp_info.aper_size * 254 1024 * 1024, MTRR_TYPE_WRCOMB, 1); 255 } 256 } 257 258 259 retcode = drm_ctxbitmap_init(dev); 260 if (retcode) { 261 DRM_ERROR("Cannot allocate memory for context bitmap.\n"); 262 goto error_out_unreg; 263 } 264 265 if (driver->driver_features & DRIVER_GEM) { 266 retcode = drm_gem_init(dev); 267 if (retcode) { 268 DRM_ERROR("Cannot initialize graphics execution " 269 "manager (GEM)\n"); 270 goto error_out_unreg; 271 } 272 } 273 274 return 0; 275 276 error_out_unreg: 277 drm_lastclose(dev); 278 return retcode; 279} 280 281 282/** 283 * Get a secondary minor number. 284 * 285 * \param dev device data structure 286 * \param sec-minor structure to hold the assigned minor 287 * \return negative number on failure. 288 * 289 * Search an empty entry and initialize it to the given parameters, and 290 * create the proc init entry via proc_init(). This routines assigns 291 * minor numbers to secondary heads of multi-headed cards 292 */ 293static int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type) 294{ 295 struct drm_minor *new_minor; 296 int ret; 297 int minor_id; 298 299 DRM_DEBUG("\n"); 300 301 minor_id = drm_minor_get_id(dev, type); 302 if (minor_id < 0) 303 return minor_id; 304 305 new_minor = kzalloc(sizeof(struct drm_minor), GFP_KERNEL); 306 if (!new_minor) { 307 ret = -ENOMEM; 308 goto err_idr; 309 } 310 311 new_minor->type = type; 312 new_minor->device = MKDEV(DRM_MAJOR, minor_id); 313 new_minor->dev = dev; 314 new_minor->index = minor_id; 315 INIT_LIST_HEAD(&new_minor->master_list); 316 317 idr_replace(&drm_minors_idr, new_minor, minor_id); 318 319 if (type == DRM_MINOR_LEGACY) { 320 ret = drm_proc_init(new_minor, minor_id, drm_proc_root); 321 if (ret) { 322 DRM_ERROR("DRM: Failed to initialize /proc/dri.\n"); 323 goto err_mem; 324 } 325 } else 326 new_minor->proc_root = NULL; 327 328#if defined(CONFIG_DEBUG_FS) 329 ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); 330 if (ret) { 331 DRM_ERROR("DRM: Failed to initialize /debugfs/dri.\n"); 332 goto err_g2; 333 } 334#endif 335 336 ret = drm_sysfs_device_add(new_minor); 337 if (ret) { 338 printk(KERN_ERR 339 "DRM: Error sysfs_device_add.\n"); 340 goto err_g2; 341 } 342 *minor = new_minor; 343 344 DRM_DEBUG("new minor assigned %d\n", minor_id); 345 return 0; 346 347 348err_g2: 349 if (new_minor->type == DRM_MINOR_LEGACY) 350 drm_proc_cleanup(new_minor, drm_proc_root); 351err_mem: 352 kfree(new_minor); 353err_idr: 354 idr_remove(&drm_minors_idr, minor_id); 355 *minor = NULL; 356 return ret; 357} 358 359/** 360 * Register. 361 * 362 * \param pdev - PCI device structure 363 * \param ent entry from the PCI ID table with device type flags 364 * \return zero on success or a negative number on failure. 365 * 366 * Attempt to gets inter module "drm" information. If we are first 367 * then register the character device and inter module information. 368 * Try and register, if we fail to register, backout previous work. 369 */ 370int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent, 371 struct drm_driver *driver) 372{ 373 struct drm_device *dev; 374 int ret; 375 376 DRM_DEBUG("\n"); 377 378 dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB); 379 if (!dev) 380 return -ENOMEM; 381 382 ret = pci_enable_device(pdev); 383 if (ret) 384 goto err_g1; 385 386 pci_set_master(pdev); 387 if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) { 388 printk(KERN_ERR "DRM: Fill_in_dev failed.\n"); 389 goto err_g2; 390 } 391 392 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 393 pci_set_drvdata(pdev, dev); 394 ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL); 395 if (ret) 396 goto err_g2; 397 } 398 399 if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY))) 400 goto err_g3; 401 402 if (dev->driver->load) { 403 ret = dev->driver->load(dev, ent->driver_data); 404 if (ret) 405 goto err_g3; 406 } 407 408 /* setup the grouping for the legacy output */ 409 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 410 ret = drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 411 if (ret) 412 goto err_g3; 413 } 414 415 list_add_tail(&dev->driver_item, &driver->device_list); 416 417 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n", 418 driver->name, driver->major, driver->minor, driver->patchlevel, 419 driver->date, pci_name(pdev), dev->primary->index); 420 421 return 0; 422 423err_g3: 424 drm_put_minor(&dev->primary); 425err_g2: 426 pci_disable_device(pdev); 427err_g1: 428 drm_free(dev, sizeof(*dev), DRM_MEM_STUB); 429 return ret; 430} 431EXPORT_SYMBOL(drm_get_dev); 432 433/** 434 * Put a secondary minor number. 435 * 436 * \param sec_minor - structure to be released 437 * \return always zero 438 * 439 * Cleans up the proc resources. Not legal for this to be the 440 * last minor released. 441 * 442 */ 443int drm_put_minor(struct drm_minor **minor_p) 444{ 445 struct drm_minor *minor = *minor_p; 446 447 DRM_DEBUG("release secondary minor %d\n", minor->index); 448 449 if (minor->type == DRM_MINOR_LEGACY) 450 drm_proc_cleanup(minor, drm_proc_root); 451#if defined(CONFIG_DEBUG_FS) 452 drm_debugfs_cleanup(minor); 453#endif 454 455 drm_sysfs_device_remove(minor); 456 457 idr_remove(&drm_minors_idr, minor->index); 458 459 kfree(minor); 460 *minor_p = NULL; 461 return 0; 462} 463 464/** 465 * Called via drm_exit() at module unload time or when pci device is 466 * unplugged. 467 * 468 * Cleans up all DRM device, calling drm_lastclose(). 469 * 470 * \sa drm_init 471 */ 472void drm_put_dev(struct drm_device *dev) 473{ 474 struct drm_driver *driver = dev->driver; 475 struct drm_map_list *r_list, *list_temp; 476 477 DRM_DEBUG("\n"); 478 479 if (!dev) { 480 DRM_ERROR("cleanup called no dev\n"); 481 return; 482 } 483 484 drm_vblank_cleanup(dev); 485 486 drm_lastclose(dev); 487 488 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && 489 dev->agp && dev->agp->agp_mtrr >= 0) { 490 int retval; 491 retval = mtrr_del(dev->agp->agp_mtrr, 492 dev->agp->agp_info.aper_base, 493 dev->agp->agp_info.aper_size * 1024 * 1024); 494 DRM_DEBUG("mtrr_del=%d\n", retval); 495 } 496 497 if (dev->driver->unload) 498 dev->driver->unload(dev); 499 500 if (drm_core_has_AGP(dev) && dev->agp) { 501 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS); 502 dev->agp = NULL; 503 } 504 505 list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) 506 drm_rmmap(dev, r_list->map); 507 drm_ht_remove(&dev->map_hash); 508 509 drm_ctxbitmap_cleanup(dev); 510 511 if (drm_core_check_feature(dev, DRIVER_MODESET)) 512 drm_put_minor(&dev->control); 513 514 if (driver->driver_features & DRIVER_GEM) 515 drm_gem_destroy(dev); 516 517 drm_put_minor(&dev->primary); 518 519 if (dev->devname) { 520 drm_free(dev->devname, strlen(dev->devname) + 1, 521 DRM_MEM_DRIVER); 522 dev->devname = NULL; 523 } 524 drm_free(dev, sizeof(*dev), DRM_MEM_STUB); 525} 526EXPORT_SYMBOL(drm_put_dev); 527