Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2008 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| 21 | * IN THE SOFTWARE. |
| 22 | * |
| 23 | * Authors: |
| 24 | * Eric Anholt <eric@anholt.net> |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/mm.h> |
| 31 | #include <linux/uaccess.h> |
| 32 | #include <linux/fs.h> |
| 33 | #include <linux/file.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/mman.h> |
| 36 | #include <linux/pagemap.h> |
| 37 | #include "drmP.h" |
| 38 | |
| 39 | /** @file drm_gem.c |
| 40 | * |
| 41 | * This file provides some of the base ioctls and library routines for |
| 42 | * the graphics memory manager implemented by each device driver. |
| 43 | * |
| 44 | * Because various devices have different requirements in terms of |
| 45 | * synchronization and migration strategies, implementing that is left up to |
| 46 | * the driver, and all that the general API provides should be generic -- |
| 47 | * allocating objects, reading/writing data with the cpu, freeing objects. |
| 48 | * Even there, platform-dependent optimizations for reading/writing data with |
| 49 | * the CPU mean we'll likely hook those out to driver-specific calls. However, |
| 50 | * the DRI2 implementation wants to have at least allocate/mmap be generic. |
| 51 | * |
| 52 | * The goal was to have swap-backed object allocation managed through |
| 53 | * struct file. However, file descriptors as handles to a struct file have |
| 54 | * two major failings: |
| 55 | * - Process limits prevent more than 1024 or so being used at a time by |
| 56 | * default. |
| 57 | * - Inability to allocate high fds will aggravate the X Server's select() |
| 58 | * handling, and likely that of many GL client applications as well. |
| 59 | * |
| 60 | * This led to a plan of using our own integer IDs (called handles, following |
| 61 | * DRM terminology) to mimic fds, and implement the fd syscalls we need as |
| 62 | * ioctls. The objects themselves will still include the struct file so |
| 63 | * that we can transition to fds if the required kernel infrastructure shows |
| 64 | * up at a later date, and as our interface with shmfs for memory allocation. |
| 65 | */ |
| 66 | |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 67 | /* |
| 68 | * We make up offsets for buffer objects so we can recognize them at |
| 69 | * mmap time. |
| 70 | */ |
| 71 | #define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1) |
| 72 | #define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16) |
| 73 | |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 74 | /** |
| 75 | * Initialize the GEM device fields |
| 76 | */ |
| 77 | |
| 78 | int |
| 79 | drm_gem_init(struct drm_device *dev) |
| 80 | { |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 81 | struct drm_gem_mm *mm; |
| 82 | |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 83 | spin_lock_init(&dev->object_name_lock); |
| 84 | idr_init(&dev->object_name_idr); |
| 85 | atomic_set(&dev->object_count, 0); |
| 86 | atomic_set(&dev->object_memory, 0); |
| 87 | atomic_set(&dev->pin_count, 0); |
| 88 | atomic_set(&dev->pin_memory, 0); |
| 89 | atomic_set(&dev->gtt_count, 0); |
| 90 | atomic_set(&dev->gtt_memory, 0); |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 91 | |
| 92 | mm = drm_calloc(1, sizeof(struct drm_gem_mm), DRM_MEM_MM); |
| 93 | if (!mm) { |
| 94 | DRM_ERROR("out of memory\n"); |
| 95 | return -ENOMEM; |
| 96 | } |
| 97 | |
| 98 | dev->mm_private = mm; |
| 99 | |
| 100 | if (drm_ht_create(&mm->offset_hash, 19)) { |
| 101 | drm_free(mm, sizeof(struct drm_gem_mm), DRM_MEM_MM); |
| 102 | return -ENOMEM; |
| 103 | } |
| 104 | |
| 105 | if (drm_mm_init(&mm->offset_manager, DRM_FILE_PAGE_OFFSET_START, |
| 106 | DRM_FILE_PAGE_OFFSET_SIZE)) { |
| 107 | drm_free(mm, sizeof(struct drm_gem_mm), DRM_MEM_MM); |
| 108 | drm_ht_remove(&mm->offset_hash); |
| 109 | return -ENOMEM; |
| 110 | } |
| 111 | |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 112 | return 0; |
| 113 | } |
| 114 | |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 115 | void |
| 116 | drm_gem_destroy(struct drm_device *dev) |
| 117 | { |
| 118 | struct drm_gem_mm *mm = dev->mm_private; |
| 119 | |
| 120 | drm_mm_takedown(&mm->offset_manager); |
| 121 | drm_ht_remove(&mm->offset_hash); |
| 122 | drm_free(mm, sizeof(struct drm_gem_mm), DRM_MEM_MM); |
| 123 | dev->mm_private = NULL; |
| 124 | } |
| 125 | |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 126 | /** |
| 127 | * Allocate a GEM object of the specified size with shmfs backing store |
| 128 | */ |
| 129 | struct drm_gem_object * |
| 130 | drm_gem_object_alloc(struct drm_device *dev, size_t size) |
| 131 | { |
| 132 | struct drm_gem_object *obj; |
| 133 | |
| 134 | BUG_ON((size & (PAGE_SIZE - 1)) != 0); |
| 135 | |
| 136 | obj = kcalloc(1, sizeof(*obj), GFP_KERNEL); |
| 137 | |
| 138 | obj->dev = dev; |
Linus Torvalds | fc8744a | 2009-01-31 15:08:56 -0800 | [diff] [blame^] | 139 | obj->filp = shmem_file_setup("drm mm object", size, VM_NORESERVE); |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 140 | if (IS_ERR(obj->filp)) { |
| 141 | kfree(obj); |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | kref_init(&obj->refcount); |
| 146 | kref_init(&obj->handlecount); |
| 147 | obj->size = size; |
| 148 | if (dev->driver->gem_init_object != NULL && |
| 149 | dev->driver->gem_init_object(obj) != 0) { |
| 150 | fput(obj->filp); |
| 151 | kfree(obj); |
| 152 | return NULL; |
| 153 | } |
| 154 | atomic_inc(&dev->object_count); |
| 155 | atomic_add(obj->size, &dev->object_memory); |
| 156 | return obj; |
| 157 | } |
| 158 | EXPORT_SYMBOL(drm_gem_object_alloc); |
| 159 | |
| 160 | /** |
| 161 | * Removes the mapping from handle to filp for this object. |
| 162 | */ |
| 163 | static int |
| 164 | drm_gem_handle_delete(struct drm_file *filp, int handle) |
| 165 | { |
| 166 | struct drm_device *dev; |
| 167 | struct drm_gem_object *obj; |
| 168 | |
| 169 | /* This is gross. The idr system doesn't let us try a delete and |
| 170 | * return an error code. It just spews if you fail at deleting. |
| 171 | * So, we have to grab a lock around finding the object and then |
| 172 | * doing the delete on it and dropping the refcount, or the user |
| 173 | * could race us to double-decrement the refcount and cause a |
| 174 | * use-after-free later. Given the frequency of our handle lookups, |
| 175 | * we may want to use ida for number allocation and a hash table |
| 176 | * for the pointers, anyway. |
| 177 | */ |
| 178 | spin_lock(&filp->table_lock); |
| 179 | |
| 180 | /* Check if we currently have a reference on the object */ |
| 181 | obj = idr_find(&filp->object_idr, handle); |
| 182 | if (obj == NULL) { |
| 183 | spin_unlock(&filp->table_lock); |
| 184 | return -EINVAL; |
| 185 | } |
| 186 | dev = obj->dev; |
| 187 | |
| 188 | /* Release reference and decrement refcount. */ |
| 189 | idr_remove(&filp->object_idr, handle); |
| 190 | spin_unlock(&filp->table_lock); |
| 191 | |
| 192 | mutex_lock(&dev->struct_mutex); |
| 193 | drm_gem_object_handle_unreference(obj); |
| 194 | mutex_unlock(&dev->struct_mutex); |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Create a handle for this object. This adds a handle reference |
| 201 | * to the object, which includes a regular reference count. Callers |
| 202 | * will likely want to dereference the object afterwards. |
| 203 | */ |
| 204 | int |
| 205 | drm_gem_handle_create(struct drm_file *file_priv, |
| 206 | struct drm_gem_object *obj, |
| 207 | int *handlep) |
| 208 | { |
| 209 | int ret; |
| 210 | |
| 211 | /* |
| 212 | * Get the user-visible handle using idr. |
| 213 | */ |
| 214 | again: |
| 215 | /* ensure there is space available to allocate a handle */ |
| 216 | if (idr_pre_get(&file_priv->object_idr, GFP_KERNEL) == 0) |
| 217 | return -ENOMEM; |
| 218 | |
| 219 | /* do the allocation under our spinlock */ |
| 220 | spin_lock(&file_priv->table_lock); |
| 221 | ret = idr_get_new_above(&file_priv->object_idr, obj, 1, handlep); |
| 222 | spin_unlock(&file_priv->table_lock); |
| 223 | if (ret == -EAGAIN) |
| 224 | goto again; |
| 225 | |
| 226 | if (ret != 0) |
| 227 | return ret; |
| 228 | |
| 229 | drm_gem_object_handle_reference(obj); |
| 230 | return 0; |
| 231 | } |
| 232 | EXPORT_SYMBOL(drm_gem_handle_create); |
| 233 | |
| 234 | /** Returns a reference to the object named by the handle. */ |
| 235 | struct drm_gem_object * |
| 236 | drm_gem_object_lookup(struct drm_device *dev, struct drm_file *filp, |
| 237 | int handle) |
| 238 | { |
| 239 | struct drm_gem_object *obj; |
| 240 | |
| 241 | spin_lock(&filp->table_lock); |
| 242 | |
| 243 | /* Check if we currently have a reference on the object */ |
| 244 | obj = idr_find(&filp->object_idr, handle); |
| 245 | if (obj == NULL) { |
| 246 | spin_unlock(&filp->table_lock); |
| 247 | return NULL; |
| 248 | } |
| 249 | |
| 250 | drm_gem_object_reference(obj); |
| 251 | |
| 252 | spin_unlock(&filp->table_lock); |
| 253 | |
| 254 | return obj; |
| 255 | } |
| 256 | EXPORT_SYMBOL(drm_gem_object_lookup); |
| 257 | |
| 258 | /** |
| 259 | * Releases the handle to an mm object. |
| 260 | */ |
| 261 | int |
| 262 | drm_gem_close_ioctl(struct drm_device *dev, void *data, |
| 263 | struct drm_file *file_priv) |
| 264 | { |
| 265 | struct drm_gem_close *args = data; |
| 266 | int ret; |
| 267 | |
| 268 | if (!(dev->driver->driver_features & DRIVER_GEM)) |
| 269 | return -ENODEV; |
| 270 | |
| 271 | ret = drm_gem_handle_delete(file_priv, args->handle); |
| 272 | |
| 273 | return ret; |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * Create a global name for an object, returning the name. |
| 278 | * |
| 279 | * Note that the name does not hold a reference; when the object |
| 280 | * is freed, the name goes away. |
| 281 | */ |
| 282 | int |
| 283 | drm_gem_flink_ioctl(struct drm_device *dev, void *data, |
| 284 | struct drm_file *file_priv) |
| 285 | { |
| 286 | struct drm_gem_flink *args = data; |
| 287 | struct drm_gem_object *obj; |
| 288 | int ret; |
| 289 | |
| 290 | if (!(dev->driver->driver_features & DRIVER_GEM)) |
| 291 | return -ENODEV; |
| 292 | |
| 293 | obj = drm_gem_object_lookup(dev, file_priv, args->handle); |
| 294 | if (obj == NULL) |
Eric Anholt | d4e7b89 | 2008-09-09 11:40:34 -0700 | [diff] [blame] | 295 | return -EBADF; |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 296 | |
| 297 | again: |
| 298 | if (idr_pre_get(&dev->object_name_idr, GFP_KERNEL) == 0) |
| 299 | return -ENOMEM; |
| 300 | |
| 301 | spin_lock(&dev->object_name_lock); |
| 302 | if (obj->name) { |
Eric Anholt | d4e7b89 | 2008-09-09 11:40:34 -0700 | [diff] [blame] | 303 | args->name = obj->name; |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 304 | spin_unlock(&dev->object_name_lock); |
Eric Anholt | d4e7b89 | 2008-09-09 11:40:34 -0700 | [diff] [blame] | 305 | return 0; |
Eric Anholt | 673a394 | 2008-07-30 12:06:12 -0700 | [diff] [blame] | 306 | } |
| 307 | ret = idr_get_new_above(&dev->object_name_idr, obj, 1, |
| 308 | &obj->name); |
| 309 | spin_unlock(&dev->object_name_lock); |
| 310 | if (ret == -EAGAIN) |
| 311 | goto again; |
| 312 | |
| 313 | if (ret != 0) { |
| 314 | mutex_lock(&dev->struct_mutex); |
| 315 | drm_gem_object_unreference(obj); |
| 316 | mutex_unlock(&dev->struct_mutex); |
| 317 | return ret; |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * Leave the reference from the lookup around as the |
| 322 | * name table now holds one |
| 323 | */ |
| 324 | args->name = (uint64_t) obj->name; |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * Open an object using the global name, returning a handle and the size. |
| 331 | * |
| 332 | * This handle (of course) holds a reference to the object, so the object |
| 333 | * will not go away until the handle is deleted. |
| 334 | */ |
| 335 | int |
| 336 | drm_gem_open_ioctl(struct drm_device *dev, void *data, |
| 337 | struct drm_file *file_priv) |
| 338 | { |
| 339 | struct drm_gem_open *args = data; |
| 340 | struct drm_gem_object *obj; |
| 341 | int ret; |
| 342 | int handle; |
| 343 | |
| 344 | if (!(dev->driver->driver_features & DRIVER_GEM)) |
| 345 | return -ENODEV; |
| 346 | |
| 347 | spin_lock(&dev->object_name_lock); |
| 348 | obj = idr_find(&dev->object_name_idr, (int) args->name); |
| 349 | if (obj) |
| 350 | drm_gem_object_reference(obj); |
| 351 | spin_unlock(&dev->object_name_lock); |
| 352 | if (!obj) |
| 353 | return -ENOENT; |
| 354 | |
| 355 | ret = drm_gem_handle_create(file_priv, obj, &handle); |
| 356 | mutex_lock(&dev->struct_mutex); |
| 357 | drm_gem_object_unreference(obj); |
| 358 | mutex_unlock(&dev->struct_mutex); |
| 359 | if (ret) |
| 360 | return ret; |
| 361 | |
| 362 | args->handle = handle; |
| 363 | args->size = obj->size; |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * Called at device open time, sets up the structure for handling refcounting |
| 370 | * of mm objects. |
| 371 | */ |
| 372 | void |
| 373 | drm_gem_open(struct drm_device *dev, struct drm_file *file_private) |
| 374 | { |
| 375 | idr_init(&file_private->object_idr); |
| 376 | spin_lock_init(&file_private->table_lock); |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Called at device close to release the file's |
| 381 | * handle references on objects. |
| 382 | */ |
| 383 | static int |
| 384 | drm_gem_object_release_handle(int id, void *ptr, void *data) |
| 385 | { |
| 386 | struct drm_gem_object *obj = ptr; |
| 387 | |
| 388 | drm_gem_object_handle_unreference(obj); |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * Called at close time when the filp is going away. |
| 395 | * |
| 396 | * Releases any remaining references on objects by this filp. |
| 397 | */ |
| 398 | void |
| 399 | drm_gem_release(struct drm_device *dev, struct drm_file *file_private) |
| 400 | { |
| 401 | mutex_lock(&dev->struct_mutex); |
| 402 | idr_for_each(&file_private->object_idr, |
| 403 | &drm_gem_object_release_handle, NULL); |
| 404 | |
| 405 | idr_destroy(&file_private->object_idr); |
| 406 | mutex_unlock(&dev->struct_mutex); |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Called after the last reference to the object has been lost. |
| 411 | * |
| 412 | * Frees the object |
| 413 | */ |
| 414 | void |
| 415 | drm_gem_object_free(struct kref *kref) |
| 416 | { |
| 417 | struct drm_gem_object *obj = (struct drm_gem_object *) kref; |
| 418 | struct drm_device *dev = obj->dev; |
| 419 | |
| 420 | BUG_ON(!mutex_is_locked(&dev->struct_mutex)); |
| 421 | |
| 422 | if (dev->driver->gem_free_object != NULL) |
| 423 | dev->driver->gem_free_object(obj); |
| 424 | |
| 425 | fput(obj->filp); |
| 426 | atomic_dec(&dev->object_count); |
| 427 | atomic_sub(obj->size, &dev->object_memory); |
| 428 | kfree(obj); |
| 429 | } |
| 430 | EXPORT_SYMBOL(drm_gem_object_free); |
| 431 | |
| 432 | /** |
| 433 | * Called after the last handle to the object has been closed |
| 434 | * |
| 435 | * Removes any name for the object. Note that this must be |
| 436 | * called before drm_gem_object_free or we'll be touching |
| 437 | * freed memory |
| 438 | */ |
| 439 | void |
| 440 | drm_gem_object_handle_free(struct kref *kref) |
| 441 | { |
| 442 | struct drm_gem_object *obj = container_of(kref, |
| 443 | struct drm_gem_object, |
| 444 | handlecount); |
| 445 | struct drm_device *dev = obj->dev; |
| 446 | |
| 447 | /* Remove any name for this object */ |
| 448 | spin_lock(&dev->object_name_lock); |
| 449 | if (obj->name) { |
| 450 | idr_remove(&dev->object_name_idr, obj->name); |
| 451 | spin_unlock(&dev->object_name_lock); |
| 452 | /* |
| 453 | * The object name held a reference to this object, drop |
| 454 | * that now. |
| 455 | */ |
| 456 | drm_gem_object_unreference(obj); |
| 457 | } else |
| 458 | spin_unlock(&dev->object_name_lock); |
| 459 | |
| 460 | } |
| 461 | EXPORT_SYMBOL(drm_gem_object_handle_free); |
| 462 | |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 463 | /** |
| 464 | * drm_gem_mmap - memory map routine for GEM objects |
| 465 | * @filp: DRM file pointer |
| 466 | * @vma: VMA for the area to be mapped |
| 467 | * |
| 468 | * If a driver supports GEM object mapping, mmap calls on the DRM file |
| 469 | * descriptor will end up here. |
| 470 | * |
| 471 | * If we find the object based on the offset passed in (vma->vm_pgoff will |
| 472 | * contain the fake offset we created when the GTT map ioctl was called on |
| 473 | * the object), we set up the driver fault handler so that any accesses |
| 474 | * to the object can be trapped, to perform migration, GTT binding, surface |
| 475 | * register allocation, or performance monitoring. |
| 476 | */ |
| 477 | int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) |
| 478 | { |
| 479 | struct drm_file *priv = filp->private_data; |
| 480 | struct drm_device *dev = priv->minor->dev; |
| 481 | struct drm_gem_mm *mm = dev->mm_private; |
| 482 | struct drm_map *map = NULL; |
| 483 | struct drm_gem_object *obj; |
| 484 | struct drm_hash_item *hash; |
| 485 | unsigned long prot; |
| 486 | int ret = 0; |
| 487 | |
| 488 | mutex_lock(&dev->struct_mutex); |
| 489 | |
| 490 | if (drm_ht_find_item(&mm->offset_hash, vma->vm_pgoff, &hash)) { |
| 491 | mutex_unlock(&dev->struct_mutex); |
| 492 | return drm_mmap(filp, vma); |
| 493 | } |
| 494 | |
| 495 | map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
| 496 | if (!map || |
| 497 | ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) { |
| 498 | ret = -EPERM; |
| 499 | goto out_unlock; |
| 500 | } |
| 501 | |
| 502 | /* Check for valid size. */ |
| 503 | if (map->size < vma->vm_end - vma->vm_start) { |
| 504 | ret = -EINVAL; |
| 505 | goto out_unlock; |
| 506 | } |
| 507 | |
| 508 | obj = map->handle; |
| 509 | if (!obj->dev->driver->gem_vm_ops) { |
| 510 | ret = -EINVAL; |
| 511 | goto out_unlock; |
| 512 | } |
| 513 | |
| 514 | vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTEXPAND; |
| 515 | vma->vm_ops = obj->dev->driver->gem_vm_ops; |
| 516 | vma->vm_private_data = map->handle; |
| 517 | /* FIXME: use pgprot_writecombine when available */ |
| 518 | prot = pgprot_val(vma->vm_page_prot); |
Dave Airlie | ae14dc0 | 2008-12-11 17:06:35 +1000 | [diff] [blame] | 519 | #ifdef CONFIG_X86 |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 520 | prot |= _PAGE_CACHE_WC; |
Dave Airlie | ae14dc0 | 2008-12-11 17:06:35 +1000 | [diff] [blame] | 521 | #endif |
Jesse Barnes | a2c0a97 | 2008-11-05 10:31:53 -0800 | [diff] [blame] | 522 | vma->vm_page_prot = __pgprot(prot); |
| 523 | |
| 524 | vma->vm_file = filp; /* Needed for drm_vm_open() */ |
| 525 | drm_vm_open_locked(vma); |
| 526 | |
| 527 | out_unlock: |
| 528 | mutex_unlock(&dev->struct_mutex); |
| 529 | |
| 530 | return ret; |
| 531 | } |
| 532 | EXPORT_SYMBOL(drm_gem_mmap); |