1247835Skib/************************************************************************** 2247835Skib * 3247835Skib * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA 4247835Skib * All Rights Reserved. 5247835Skib * 6247835Skib * Permission is hereby granted, free of charge, to any person obtaining a 7247835Skib * copy of this software and associated documentation files (the 8247835Skib * "Software"), to deal in the Software without restriction, including 9247835Skib * without limitation the rights to use, copy, modify, merge, publish, 10247835Skib * distribute, sub license, and/or sell copies of the Software, and to 11247835Skib * permit persons to whom the Software is furnished to do so, subject to 12247835Skib * the following conditions: 13247835Skib * 14247835Skib * The above copyright notice and this permission notice (including the 15247835Skib * next paragraph) shall be included in all copies or substantial portions 16247835Skib * of the Software. 17247835Skib * 18247835Skib * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19247835Skib * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20247835Skib * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21247835Skib * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22247835Skib * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23247835Skib * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24247835Skib * USE OR OTHER DEALINGS IN THE SOFTWARE. 25247835Skib * 26247835Skib **************************************************************************/ 27247835Skib/* 28247835Skib * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> 29247835Skib */ 30247835Skib/* $FreeBSD$ */ 31247835Skib 32247835Skib#ifndef _TTM_BO_DRIVER_H_ 33247835Skib#define _TTM_BO_DRIVER_H_ 34247835Skib 35247835Skib#include <dev/drm2/drmP.h> 36247835Skib#include <dev/drm2/ttm/ttm_bo_api.h> 37247835Skib#include <dev/drm2/ttm/ttm_memory.h> 38247835Skib#include <dev/drm2/ttm/ttm_module.h> 39247835Skib#include <dev/drm2/drm_global.h> 40247835Skib#include <sys/rwlock.h> 41247835Skib#include <sys/tree.h> 42247835Skib 43247835Skibstruct ttm_backend_func { 44247835Skib /** 45247835Skib * struct ttm_backend_func member bind 46247835Skib * 47247835Skib * @ttm: Pointer to a struct ttm_tt. 48247835Skib * @bo_mem: Pointer to a struct ttm_mem_reg describing the 49247835Skib * memory type and location for binding. 50247835Skib * 51247835Skib * Bind the backend pages into the aperture in the location 52247835Skib * indicated by @bo_mem. This function should be able to handle 53247835Skib * differences between aperture and system page sizes. 54247835Skib */ 55247835Skib int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem); 56247835Skib 57247835Skib /** 58247835Skib * struct ttm_backend_func member unbind 59247835Skib * 60247835Skib * @ttm: Pointer to a struct ttm_tt. 61247835Skib * 62247835Skib * Unbind previously bound backend pages. This function should be 63247835Skib * able to handle differences between aperture and system page sizes. 64247835Skib */ 65247835Skib int (*unbind) (struct ttm_tt *ttm); 66247835Skib 67247835Skib /** 68247835Skib * struct ttm_backend_func member destroy 69247835Skib * 70247835Skib * @ttm: Pointer to a struct ttm_tt. 71247835Skib * 72247835Skib * Destroy the backend. This will be call back from ttm_tt_destroy so 73247835Skib * don't call ttm_tt_destroy from the callback or infinite loop. 74247835Skib */ 75247835Skib void (*destroy) (struct ttm_tt *ttm); 76247835Skib}; 77247835Skib 78247835Skib#define TTM_PAGE_FLAG_WRITE (1 << 3) 79247835Skib#define TTM_PAGE_FLAG_SWAPPED (1 << 4) 80247835Skib#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5) 81247835Skib#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6) 82247835Skib#define TTM_PAGE_FLAG_DMA32 (1 << 7) 83247835Skib#define TTM_PAGE_FLAG_SG (1 << 8) 84247835Skib 85247835Skibenum ttm_caching_state { 86247835Skib tt_uncached, 87247835Skib tt_wc, 88247835Skib tt_cached 89247835Skib}; 90247835Skib 91247835Skib/** 92247835Skib * struct ttm_tt 93247835Skib * 94247835Skib * @bdev: Pointer to a struct ttm_bo_device. 95247835Skib * @func: Pointer to a struct ttm_backend_func that describes 96247835Skib * the backend methods. 97247835Skib * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL 98247835Skib * pointer. 99247835Skib * @pages: Array of pages backing the data. 100247835Skib * @num_pages: Number of pages in the page array. 101247835Skib * @bdev: Pointer to the current struct ttm_bo_device. 102247835Skib * @be: Pointer to the ttm backend. 103247835Skib * @swap_storage: Pointer to shmem struct file for swap storage. 104247835Skib * @caching_state: The current caching state of the pages. 105247835Skib * @state: The current binding state of the pages. 106247835Skib * 107247835Skib * This is a structure holding the pages, caching- and aperture binding 108247835Skib * status for a buffer object that isn't backed by fixed (VRAM / AGP) 109247835Skib * memory. 110247835Skib */ 111247835Skib 112247835Skibstruct ttm_tt { 113247835Skib struct ttm_bo_device *bdev; 114247835Skib struct ttm_backend_func *func; 115247835Skib struct vm_page *dummy_read_page; 116247835Skib struct vm_page **pages; 117247835Skib uint32_t page_flags; 118247835Skib unsigned long num_pages; 119247835Skib struct sg_table *sg; /* for SG objects via dma-buf */ 120247835Skib struct ttm_bo_global *glob; 121247835Skib struct vm_object *swap_storage; 122247835Skib enum ttm_caching_state caching_state; 123247835Skib enum { 124247835Skib tt_bound, 125247835Skib tt_unbound, 126247835Skib tt_unpopulated, 127247835Skib } state; 128247835Skib}; 129247835Skib 130247835Skib/** 131247835Skib * struct ttm_dma_tt 132247835Skib * 133247835Skib * @ttm: Base ttm_tt struct. 134247835Skib * @dma_address: The DMA (bus) addresses of the pages 135247835Skib * @pages_list: used by some page allocation backend 136247835Skib * 137247835Skib * This is a structure holding the pages, caching- and aperture binding 138247835Skib * status for a buffer object that isn't backed by fixed (VRAM / AGP) 139247835Skib * memory. 140247835Skib */ 141247835Skibstruct ttm_dma_tt { 142247835Skib struct ttm_tt ttm; 143247835Skib dma_addr_t *dma_address; 144247835Skib struct list_head pages_list; 145247835Skib}; 146247835Skib 147247835Skib#define TTM_MEMTYPE_FLAG_FIXED (1 << 0) /* Fixed (on-card) PCI memory */ 148247835Skib#define TTM_MEMTYPE_FLAG_MAPPABLE (1 << 1) /* Memory mappable */ 149247835Skib#define TTM_MEMTYPE_FLAG_CMA (1 << 3) /* Can't map aperture */ 150247835Skib 151247835Skibstruct ttm_mem_type_manager; 152247835Skib 153247835Skibstruct ttm_mem_type_manager_func { 154247835Skib /** 155247835Skib * struct ttm_mem_type_manager member init 156247835Skib * 157247835Skib * @man: Pointer to a memory type manager. 158247835Skib * @p_size: Implementation dependent, but typically the size of the 159247835Skib * range to be managed in pages. 160247835Skib * 161247835Skib * Called to initialize a private range manager. The function is 162247835Skib * expected to initialize the man::priv member. 163247835Skib * Returns 0 on success, negative error code on failure. 164247835Skib */ 165247835Skib int (*init)(struct ttm_mem_type_manager *man, unsigned long p_size); 166247835Skib 167247835Skib /** 168247835Skib * struct ttm_mem_type_manager member takedown 169247835Skib * 170247835Skib * @man: Pointer to a memory type manager. 171247835Skib * 172247835Skib * Called to undo the setup done in init. All allocated resources 173247835Skib * should be freed. 174247835Skib */ 175247835Skib int (*takedown)(struct ttm_mem_type_manager *man); 176247835Skib 177247835Skib /** 178247835Skib * struct ttm_mem_type_manager member get_node 179247835Skib * 180247835Skib * @man: Pointer to a memory type manager. 181247835Skib * @bo: Pointer to the buffer object we're allocating space for. 182247835Skib * @placement: Placement details. 183247835Skib * @mem: Pointer to a struct ttm_mem_reg to be filled in. 184247835Skib * 185247835Skib * This function should allocate space in the memory type managed 186247835Skib * by @man. Placement details if 187247835Skib * applicable are given by @placement. If successful, 188247835Skib * @mem::mm_node should be set to a non-null value, and 189247835Skib * @mem::start should be set to a value identifying the beginning 190247835Skib * of the range allocated, and the function should return zero. 191247835Skib * If the memory region accommodate the buffer object, @mem::mm_node 192247835Skib * should be set to NULL, and the function should return 0. 193247835Skib * If a system error occurred, preventing the request to be fulfilled, 194247835Skib * the function should return a negative error code. 195247835Skib * 196247835Skib * Note that @mem::mm_node will only be dereferenced by 197247835Skib * struct ttm_mem_type_manager functions and optionally by the driver, 198247835Skib * which has knowledge of the underlying type. 199247835Skib * 200247835Skib * This function may not be called from within atomic context, so 201247835Skib * an implementation can and must use either a mutex or a spinlock to 202247835Skib * protect any data structures managing the space. 203247835Skib */ 204247835Skib int (*get_node)(struct ttm_mem_type_manager *man, 205247835Skib struct ttm_buffer_object *bo, 206247835Skib struct ttm_placement *placement, 207247835Skib struct ttm_mem_reg *mem); 208247835Skib 209247835Skib /** 210247835Skib * struct ttm_mem_type_manager member put_node 211247835Skib * 212247835Skib * @man: Pointer to a memory type manager. 213247835Skib * @mem: Pointer to a struct ttm_mem_reg to be filled in. 214247835Skib * 215247835Skib * This function frees memory type resources previously allocated 216247835Skib * and that are identified by @mem::mm_node and @mem::start. May not 217247835Skib * be called from within atomic context. 218247835Skib */ 219247835Skib void (*put_node)(struct ttm_mem_type_manager *man, 220247835Skib struct ttm_mem_reg *mem); 221247835Skib 222247835Skib /** 223247835Skib * struct ttm_mem_type_manager member debug 224247835Skib * 225247835Skib * @man: Pointer to a memory type manager. 226247835Skib * @prefix: Prefix to be used in printout to identify the caller. 227247835Skib * 228247835Skib * This function is called to print out the state of the memory 229247835Skib * type manager to aid debugging of out-of-memory conditions. 230247835Skib * It may not be called from within atomic context. 231247835Skib */ 232247835Skib void (*debug)(struct ttm_mem_type_manager *man, const char *prefix); 233247835Skib}; 234247835Skib 235247835Skib/** 236247835Skib * struct ttm_mem_type_manager 237247835Skib * 238247835Skib * @has_type: The memory type has been initialized. 239247835Skib * @use_type: The memory type is enabled. 240247835Skib * @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory 241247835Skib * managed by this memory type. 242247835Skib * @gpu_offset: If used, the GPU offset of the first managed page of 243247835Skib * fixed memory or the first managed location in an aperture. 244247835Skib * @size: Size of the managed region. 245247835Skib * @available_caching: A mask of available caching types, TTM_PL_FLAG_XX, 246247835Skib * as defined in ttm_placement_common.h 247247835Skib * @default_caching: The default caching policy used for a buffer object 248247835Skib * placed in this memory type if the user doesn't provide one. 249247835Skib * @func: structure pointer implementing the range manager. See above 250247835Skib * @priv: Driver private closure for @func. 251247835Skib * @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures 252247835Skib * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions 253247835Skib * reserved by the TTM vm system. 254247835Skib * @io_reserve_lru: Optional lru list for unreserving io mem regions. 255247835Skib * @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain 256247835Skib * static information. bdev::driver::io_mem_free is never used. 257247835Skib * @lru: The lru list for this memory type. 258247835Skib * 259247835Skib * This structure is used to identify and manage memory types for a device. 260247835Skib * It's set up by the ttm_bo_driver::init_mem_type method. 261247835Skib */ 262247835Skib 263247835Skib 264247835Skib 265247835Skibstruct ttm_mem_type_manager { 266247835Skib struct ttm_bo_device *bdev; 267247835Skib 268247835Skib /* 269247835Skib * No protection. Constant from start. 270247835Skib */ 271247835Skib 272247835Skib bool has_type; 273247835Skib bool use_type; 274247835Skib uint32_t flags; 275247835Skib unsigned long gpu_offset; 276247835Skib uint64_t size; 277247835Skib uint32_t available_caching; 278247835Skib uint32_t default_caching; 279247835Skib const struct ttm_mem_type_manager_func *func; 280247835Skib void *priv; 281247835Skib struct sx io_reserve_mutex; 282247835Skib bool use_io_reserve_lru; 283247835Skib bool io_reserve_fastpath; 284247835Skib 285247835Skib /* 286247835Skib * Protected by @io_reserve_mutex: 287247835Skib */ 288247835Skib 289247835Skib struct list_head io_reserve_lru; 290247835Skib 291247835Skib /* 292247835Skib * Protected by the global->lru_lock. 293247835Skib */ 294247835Skib 295247835Skib struct list_head lru; 296247835Skib}; 297247835Skib 298247835Skib/** 299247835Skib * struct ttm_bo_driver 300247835Skib * 301247835Skib * @create_ttm_backend_entry: Callback to create a struct ttm_backend. 302247835Skib * @invalidate_caches: Callback to invalidate read caches when a buffer object 303247835Skib * has been evicted. 304247835Skib * @init_mem_type: Callback to initialize a struct ttm_mem_type_manager 305247835Skib * structure. 306247835Skib * @evict_flags: Callback to obtain placement flags when a buffer is evicted. 307247835Skib * @move: Callback for a driver to hook in accelerated functions to 308247835Skib * move a buffer. 309247835Skib * If set to NULL, a potentially slow memcpy() move is used. 310247835Skib * @sync_obj_signaled: See ttm_fence_api.h 311247835Skib * @sync_obj_wait: See ttm_fence_api.h 312247835Skib * @sync_obj_flush: See ttm_fence_api.h 313247835Skib * @sync_obj_unref: See ttm_fence_api.h 314247835Skib * @sync_obj_ref: See ttm_fence_api.h 315247835Skib */ 316247835Skib 317247835Skibstruct ttm_bo_driver { 318247835Skib /** 319247835Skib * ttm_tt_create 320247835Skib * 321247835Skib * @bdev: pointer to a struct ttm_bo_device: 322247835Skib * @size: Size of the data needed backing. 323247835Skib * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags. 324247835Skib * @dummy_read_page: See struct ttm_bo_device. 325247835Skib * 326247835Skib * Create a struct ttm_tt to back data with system memory pages. 327247835Skib * No pages are actually allocated. 328247835Skib * Returns: 329247835Skib * NULL: Out of memory. 330247835Skib */ 331247835Skib struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev, 332247835Skib unsigned long size, 333247835Skib uint32_t page_flags, 334247835Skib struct vm_page *dummy_read_page); 335247835Skib 336247835Skib /** 337247835Skib * ttm_tt_populate 338247835Skib * 339247835Skib * @ttm: The struct ttm_tt to contain the backing pages. 340247835Skib * 341247835Skib * Allocate all backing pages 342247835Skib * Returns: 343247835Skib * -ENOMEM: Out of memory. 344247835Skib */ 345247835Skib int (*ttm_tt_populate)(struct ttm_tt *ttm); 346247835Skib 347247835Skib /** 348247835Skib * ttm_tt_unpopulate 349247835Skib * 350247835Skib * @ttm: The struct ttm_tt to contain the backing pages. 351247835Skib * 352247835Skib * Free all backing page 353247835Skib */ 354247835Skib void (*ttm_tt_unpopulate)(struct ttm_tt *ttm); 355247835Skib 356247835Skib /** 357247835Skib * struct ttm_bo_driver member invalidate_caches 358247835Skib * 359247835Skib * @bdev: the buffer object device. 360247835Skib * @flags: new placement of the rebound buffer object. 361247835Skib * 362247835Skib * A previosly evicted buffer has been rebound in a 363247835Skib * potentially new location. Tell the driver that it might 364247835Skib * consider invalidating read (texture) caches on the next command 365247835Skib * submission as a consequence. 366247835Skib */ 367247835Skib 368247835Skib int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags); 369247835Skib int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type, 370247835Skib struct ttm_mem_type_manager *man); 371247835Skib /** 372247835Skib * struct ttm_bo_driver member evict_flags: 373247835Skib * 374247835Skib * @bo: the buffer object to be evicted 375247835Skib * 376247835Skib * Return the bo flags for a buffer which is not mapped to the hardware. 377247835Skib * These will be placed in proposed_flags so that when the move is 378247835Skib * finished, they'll end up in bo->mem.flags 379247835Skib */ 380247835Skib 381247835Skib void(*evict_flags) (struct ttm_buffer_object *bo, 382247835Skib struct ttm_placement *placement); 383247835Skib /** 384247835Skib * struct ttm_bo_driver member move: 385247835Skib * 386247835Skib * @bo: the buffer to move 387247835Skib * @evict: whether this motion is evicting the buffer from 388247835Skib * the graphics address space 389247835Skib * @interruptible: Use interruptible sleeps if possible when sleeping. 390247835Skib * @no_wait: whether this should give up and return -EBUSY 391247835Skib * if this move would require sleeping 392247835Skib * @new_mem: the new memory region receiving the buffer 393247835Skib * 394247835Skib * Move a buffer between two memory regions. 395247835Skib */ 396247835Skib int (*move) (struct ttm_buffer_object *bo, 397247835Skib bool evict, bool interruptible, 398247835Skib bool no_wait_gpu, 399247835Skib struct ttm_mem_reg *new_mem); 400247835Skib 401247835Skib /** 402247835Skib * struct ttm_bo_driver_member verify_access 403247835Skib * 404247835Skib * @bo: Pointer to a buffer object. 405247835Skib * @filp: Pointer to a struct file trying to access the object. 406247835Skib * FreeBSD: use devfs_get_cdevpriv etc. 407247835Skib * 408247835Skib * Called from the map / write / read methods to verify that the 409247835Skib * caller is permitted to access the buffer object. 410247835Skib * This member may be set to NULL, which will refuse this kind of 411247835Skib * access for all buffer objects. 412247835Skib * This function should return 0 if access is granted, -EPERM otherwise. 413247835Skib */ 414247835Skib int (*verify_access) (struct ttm_buffer_object *bo); 415247835Skib 416247835Skib /** 417247835Skib * In case a driver writer dislikes the TTM fence objects, 418247835Skib * the driver writer can replace those with sync objects of 419247835Skib * his / her own. If it turns out that no driver writer is 420247835Skib * using these. I suggest we remove these hooks and plug in 421247835Skib * fences directly. The bo driver needs the following functionality: 422247835Skib * See the corresponding functions in the fence object API 423247835Skib * documentation. 424247835Skib */ 425247835Skib 426247835Skib bool (*sync_obj_signaled) (void *sync_obj); 427247835Skib int (*sync_obj_wait) (void *sync_obj, 428247835Skib bool lazy, bool interruptible); 429247835Skib int (*sync_obj_flush) (void *sync_obj); 430247835Skib void (*sync_obj_unref) (void **sync_obj); 431247835Skib void *(*sync_obj_ref) (void *sync_obj); 432247835Skib 433247835Skib /* hook to notify driver about a driver move so it 434247835Skib * can do tiling things */ 435247835Skib void (*move_notify)(struct ttm_buffer_object *bo, 436247835Skib struct ttm_mem_reg *new_mem); 437247835Skib /* notify the driver we are taking a fault on this BO 438247835Skib * and have reserved it */ 439247835Skib int (*fault_reserve_notify)(struct ttm_buffer_object *bo); 440247835Skib 441247835Skib /** 442247835Skib * notify the driver that we're about to swap out this bo 443247835Skib */ 444247835Skib void (*swap_notify) (struct ttm_buffer_object *bo); 445247835Skib 446247835Skib /** 447247835Skib * Driver callback on when mapping io memory (for bo_move_memcpy 448247835Skib * for instance). TTM will take care to call io_mem_free whenever 449247835Skib * the mapping is not use anymore. io_mem_reserve & io_mem_free 450247835Skib * are balanced. 451247835Skib */ 452247835Skib int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem); 453247835Skib void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem); 454247835Skib}; 455247835Skib 456247835Skib/** 457247835Skib * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global. 458247835Skib */ 459247835Skib 460247835Skibstruct ttm_bo_global_ref { 461247835Skib struct drm_global_reference ref; 462247835Skib struct ttm_mem_global *mem_glob; 463247835Skib}; 464247835Skib 465247835Skib/** 466247835Skib * struct ttm_bo_global - Buffer object driver global data. 467247835Skib * 468247835Skib * @mem_glob: Pointer to a struct ttm_mem_global object for accounting. 469247835Skib * @dummy_read_page: Pointer to a dummy page used for mapping requests 470247835Skib * of unpopulated pages. 471247835Skib * @shrink: A shrink callback object used for buffer object swap. 472247835Skib * @device_list_mutex: Mutex protecting the device list. 473247835Skib * This mutex is held while traversing the device list for pm options. 474247835Skib * @lru_lock: Spinlock protecting the bo subsystem lru lists. 475247835Skib * @device_list: List of buffer object devices. 476247835Skib * @swap_lru: Lru list of buffer objects used for swapping. 477247835Skib */ 478247835Skib 479247835Skibstruct ttm_bo_global { 480247835Skib u_int kobj_ref; 481247835Skib 482247835Skib /** 483247835Skib * Constant after init. 484247835Skib */ 485247835Skib 486247835Skib struct ttm_mem_global *mem_glob; 487247835Skib struct vm_page *dummy_read_page; 488247835Skib struct ttm_mem_shrink shrink; 489247835Skib struct sx device_list_mutex; 490247835Skib struct mtx lru_lock; 491247835Skib 492247835Skib /** 493247835Skib * Protected by device_list_mutex. 494247835Skib */ 495247835Skib struct list_head device_list; 496247835Skib 497247835Skib /** 498247835Skib * Protected by the lru_lock. 499247835Skib */ 500247835Skib struct list_head swap_lru; 501247835Skib 502247835Skib /** 503247835Skib * Internal protection. 504247835Skib */ 505247835Skib atomic_t bo_count; 506247835Skib}; 507247835Skib 508247835Skib 509247835Skib#define TTM_NUM_MEM_TYPES 8 510247835Skib 511247835Skib#define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs 512247835Skib idling before CPU mapping */ 513247835Skib#define TTM_BO_PRIV_FLAG_MAX 1 514247835Skib/** 515247835Skib * struct ttm_bo_device - Buffer object driver device-specific data. 516247835Skib * 517247835Skib * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver. 518247835Skib * @man: An array of mem_type_managers. 519247835Skib * @fence_lock: Protects the synchronizing members on *all* bos belonging 520247835Skib * to this device. 521247835Skib * @addr_space_mm: Range manager for the device address space. 522247835Skib * lru_lock: Spinlock that protects the buffer+device lru lists and 523247835Skib * ddestroy lists. 524247835Skib * @val_seq: Current validation sequence. 525247835Skib * @dev_mapping: A pointer to the struct address_space representing the 526247835Skib * device address space. 527247835Skib * @wq: Work queue structure for the delayed delete workqueue. 528247835Skib * 529247835Skib */ 530247835Skib 531247835Skibstruct ttm_bo_device { 532247835Skib 533247835Skib /* 534247835Skib * Constant after bo device init / atomic. 535247835Skib */ 536247835Skib struct list_head device_list; 537247835Skib struct ttm_bo_global *glob; 538247835Skib struct ttm_bo_driver *driver; 539247835Skib struct rwlock vm_lock; 540247835Skib struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES]; 541247835Skib struct mtx fence_lock; 542247835Skib /* 543247835Skib * Protected by the vm lock. 544247835Skib */ 545247835Skib RB_HEAD(ttm_bo_device_buffer_objects, ttm_buffer_object) addr_space_rb; 546247835Skib struct drm_mm addr_space_mm; 547247835Skib 548247835Skib /* 549247835Skib * Protected by the global:lru lock. 550247835Skib */ 551247835Skib struct list_head ddestroy; 552247835Skib uint32_t val_seq; 553247835Skib 554247835Skib /* 555247835Skib * Protected by load / firstopen / lastclose /unload sync. 556247835Skib */ 557247835Skib 558247835Skib struct address_space *dev_mapping; 559247835Skib 560247835Skib /* 561247835Skib * Internal protection. 562247835Skib */ 563247835Skib 564247835Skib struct timeout_task wq; 565247835Skib 566247835Skib bool need_dma32; 567247835Skib}; 568247835Skib 569247835Skib/** 570247835Skib * ttm_flag_masked 571247835Skib * 572247835Skib * @old: Pointer to the result and original value. 573247835Skib * @new: New value of bits. 574247835Skib * @mask: Mask of bits to change. 575247835Skib * 576247835Skib * Convenience function to change a number of bits identified by a mask. 577247835Skib */ 578247835Skib 579247835Skibstatic inline uint32_t 580247835Skibttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask) 581247835Skib{ 582247835Skib *old ^= (*old ^ new) & mask; 583247835Skib return *old; 584247835Skib} 585247835Skib 586247835Skib/** 587247835Skib * ttm_tt_init 588247835Skib * 589247835Skib * @ttm: The struct ttm_tt. 590247835Skib * @bdev: pointer to a struct ttm_bo_device: 591247835Skib * @size: Size of the data needed backing. 592247835Skib * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags. 593247835Skib * @dummy_read_page: See struct ttm_bo_device. 594247835Skib * 595247835Skib * Create a struct ttm_tt to back data with system memory pages. 596247835Skib * No pages are actually allocated. 597247835Skib * Returns: 598247835Skib * NULL: Out of memory. 599247835Skib */ 600247835Skibextern int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev, 601247835Skib unsigned long size, uint32_t page_flags, 602247835Skib struct vm_page *dummy_read_page); 603247835Skibextern int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev, 604247835Skib unsigned long size, uint32_t page_flags, 605247835Skib struct vm_page *dummy_read_page); 606247835Skib 607247835Skib/** 608247835Skib * ttm_tt_fini 609247835Skib * 610247835Skib * @ttm: the ttm_tt structure. 611247835Skib * 612247835Skib * Free memory of ttm_tt structure 613247835Skib */ 614247835Skibextern void ttm_tt_fini(struct ttm_tt *ttm); 615247835Skibextern void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma); 616247835Skib 617247835Skib/** 618247835Skib * ttm_ttm_bind: 619247835Skib * 620247835Skib * @ttm: The struct ttm_tt containing backing pages. 621247835Skib * @bo_mem: The struct ttm_mem_reg identifying the binding location. 622247835Skib * 623247835Skib * Bind the pages of @ttm to an aperture location identified by @bo_mem 624247835Skib */ 625247835Skibextern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem); 626247835Skib 627247835Skib/** 628247835Skib * ttm_ttm_destroy: 629247835Skib * 630247835Skib * @ttm: The struct ttm_tt. 631247835Skib * 632247835Skib * Unbind, unpopulate and destroy common struct ttm_tt. 633247835Skib */ 634247835Skibextern void ttm_tt_destroy(struct ttm_tt *ttm); 635247835Skib 636247835Skib/** 637247835Skib * ttm_ttm_unbind: 638247835Skib * 639247835Skib * @ttm: The struct ttm_tt. 640247835Skib * 641247835Skib * Unbind a struct ttm_tt. 642247835Skib */ 643247835Skibextern void ttm_tt_unbind(struct ttm_tt *ttm); 644247835Skib 645247835Skib/** 646247835Skib * ttm_tt_swapin: 647247835Skib * 648247835Skib * @ttm: The struct ttm_tt. 649247835Skib * 650247835Skib * Swap in a previously swap out ttm_tt. 651247835Skib */ 652247835Skibextern int ttm_tt_swapin(struct ttm_tt *ttm); 653247835Skib 654247835Skib/** 655247835Skib * ttm_tt_cache_flush: 656247835Skib * 657247835Skib * @pages: An array of pointers to struct page:s to flush. 658247835Skib * @num_pages: Number of pages to flush. 659247835Skib * 660247835Skib * Flush the data of the indicated pages from the cpu caches. 661247835Skib * This is used when changing caching attributes of the pages from 662247835Skib * cache-coherent. 663247835Skib */ 664247835Skibextern void ttm_tt_cache_flush(struct vm_page *pages[], unsigned long num_pages); 665247835Skib 666247835Skib/** 667247835Skib * ttm_tt_set_placement_caching: 668247835Skib * 669247835Skib * @ttm A struct ttm_tt the backing pages of which will change caching policy. 670247835Skib * @placement: Flag indicating the desired caching policy. 671247835Skib * 672247835Skib * This function will change caching policy of any default kernel mappings of 673247835Skib * the pages backing @ttm. If changing from cached to uncached or 674247835Skib * write-combined, 675247835Skib * all CPU caches will first be flushed to make sure the data of the pages 676247835Skib * hit RAM. This function may be very costly as it involves global TLB 677247835Skib * and cache flushes and potential page splitting / combining. 678247835Skib */ 679247835Skibextern int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement); 680247835Skibextern int ttm_tt_swapout(struct ttm_tt *ttm, 681247835Skib struct vm_object *persistent_swap_storage); 682247835Skib 683247835Skib/* 684247835Skib * ttm_bo.c 685247835Skib */ 686247835Skib 687247835Skib/** 688247835Skib * ttm_mem_reg_is_pci 689247835Skib * 690247835Skib * @bdev: Pointer to a struct ttm_bo_device. 691247835Skib * @mem: A valid struct ttm_mem_reg. 692247835Skib * 693247835Skib * Returns true if the memory described by @mem is PCI memory, 694247835Skib * false otherwise. 695247835Skib */ 696247835Skibextern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, 697247835Skib struct ttm_mem_reg *mem); 698247835Skib 699247835Skib/** 700247835Skib * ttm_bo_mem_space 701247835Skib * 702247835Skib * @bo: Pointer to a struct ttm_buffer_object. the data of which 703247835Skib * we want to allocate space for. 704247835Skib * @proposed_placement: Proposed new placement for the buffer object. 705247835Skib * @mem: A struct ttm_mem_reg. 706247835Skib * @interruptible: Sleep interruptible when sliping. 707247835Skib * @no_wait_gpu: Return immediately if the GPU is busy. 708247835Skib * 709247835Skib * Allocate memory space for the buffer object pointed to by @bo, using 710247835Skib * the placement flags in @mem, potentially evicting other idle buffer objects. 711247835Skib * This function may sleep while waiting for space to become available. 712247835Skib * Returns: 713247835Skib * -EBUSY: No space available (only if no_wait == 1). 714247835Skib * -ENOMEM: Could not allocate memory for the buffer object, either due to 715247835Skib * fragmentation or concurrent allocators. 716247835Skib * -ERESTARTSYS: An interruptible sleep was interrupted by a signal. 717247835Skib */ 718247835Skibextern int ttm_bo_mem_space(struct ttm_buffer_object *bo, 719247835Skib struct ttm_placement *placement, 720247835Skib struct ttm_mem_reg *mem, 721247835Skib bool interruptible, 722247835Skib bool no_wait_gpu); 723247835Skib 724247835Skibextern void ttm_bo_mem_put(struct ttm_buffer_object *bo, 725247835Skib struct ttm_mem_reg *mem); 726247835Skibextern void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo, 727247835Skib struct ttm_mem_reg *mem); 728247835Skib 729247835Skibextern void ttm_bo_global_release(struct drm_global_reference *ref); 730247835Skibextern int ttm_bo_global_init(struct drm_global_reference *ref); 731247835Skib 732247835Skibextern int ttm_bo_device_release(struct ttm_bo_device *bdev); 733247835Skib 734247835Skib/** 735247835Skib * ttm_bo_device_init 736247835Skib * 737247835Skib * @bdev: A pointer to a struct ttm_bo_device to initialize. 738247835Skib * @glob: A pointer to an initialized struct ttm_bo_global. 739247835Skib * @driver: A pointer to a struct ttm_bo_driver set up by the caller. 740247835Skib * @file_page_offset: Offset into the device address space that is available 741247835Skib * for buffer data. This ensures compatibility with other users of the 742247835Skib * address space. 743247835Skib * 744247835Skib * Initializes a struct ttm_bo_device: 745247835Skib * Returns: 746247835Skib * !0: Failure. 747247835Skib */ 748247835Skibextern int ttm_bo_device_init(struct ttm_bo_device *bdev, 749247835Skib struct ttm_bo_global *glob, 750247835Skib struct ttm_bo_driver *driver, 751247835Skib uint64_t file_page_offset, bool need_dma32); 752247835Skib 753247835Skib/** 754247835Skib * ttm_bo_unmap_virtual 755247835Skib * 756247835Skib * @bo: tear down the virtual mappings for this BO 757247835Skib */ 758247835Skibextern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo); 759247835Skib 760247835Skib/** 761247835Skib * ttm_bo_unmap_virtual 762247835Skib * 763247835Skib * @bo: tear down the virtual mappings for this BO 764247835Skib * 765247835Skib * The caller must take ttm_mem_io_lock before calling this function. 766247835Skib */ 767247835Skibextern void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo); 768247835Skib 769247835Skibextern int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo); 770247835Skibextern void ttm_mem_io_free_vm(struct ttm_buffer_object *bo); 771247835Skibextern int ttm_mem_io_lock(struct ttm_mem_type_manager *man, 772247835Skib bool interruptible); 773247835Skibextern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man); 774247835Skib 775247835Skib 776247835Skib/** 777247835Skib * ttm_bo_reserve: 778247835Skib * 779247835Skib * @bo: A pointer to a struct ttm_buffer_object. 780247835Skib * @interruptible: Sleep interruptible if waiting. 781247835Skib * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY. 782247835Skib * @use_sequence: If @bo is already reserved, Only sleep waiting for 783247835Skib * it to become unreserved if @sequence < (@bo)->sequence. 784247835Skib * 785247835Skib * Locks a buffer object for validation. (Or prevents other processes from 786247835Skib * locking it for validation) and removes it from lru lists, while taking 787247835Skib * a number of measures to prevent deadlocks. 788247835Skib * 789247835Skib * Deadlocks may occur when two processes try to reserve multiple buffers in 790247835Skib * different order, either by will or as a result of a buffer being evicted 791247835Skib * to make room for a buffer already reserved. (Buffers are reserved before 792247835Skib * they are evicted). The following algorithm prevents such deadlocks from 793247835Skib * occurring: 794254861Sdumbbell * Processes attempting to reserve multiple buffers other than for eviction, 795247835Skib * (typically execbuf), should first obtain a unique 32-bit 796247835Skib * validation sequence number, 797247835Skib * and call this function with @use_sequence == 1 and @sequence == the unique 798247835Skib * sequence number. If upon call of this function, the buffer object is already 799247835Skib * reserved, the validation sequence is checked against the validation 800247835Skib * sequence of the process currently reserving the buffer, 801247835Skib * and if the current validation sequence is greater than that of the process 802247835Skib * holding the reservation, the function returns -EAGAIN. Otherwise it sleeps 803247835Skib * waiting for the buffer to become unreserved, after which it retries 804247835Skib * reserving. 805247835Skib * The caller should, when receiving an -EAGAIN error 806247835Skib * release all its buffer reservations, wait for @bo to become unreserved, and 807247835Skib * then rerun the validation with the same validation sequence. This procedure 808247835Skib * will always guarantee that the process with the lowest validation sequence 809247835Skib * will eventually succeed, preventing both deadlocks and starvation. 810247835Skib * 811247835Skib * Returns: 812247835Skib * -EAGAIN: The reservation may cause a deadlock. 813247835Skib * Release all buffer reservations, wait for @bo to become unreserved and 814247835Skib * try again. (only if use_sequence == 1). 815247835Skib * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by 816247835Skib * a signal. Release all buffer reservations and return to user-space. 817247835Skib * -EBUSY: The function needed to sleep, but @no_wait was true 818247835Skib * -EDEADLK: Bo already reserved using @sequence. This error code will only 819247835Skib * be returned if @use_sequence is set to true. 820247835Skib */ 821247835Skibextern int ttm_bo_reserve(struct ttm_buffer_object *bo, 822247835Skib bool interruptible, 823247835Skib bool no_wait, bool use_sequence, uint32_t sequence); 824247835Skib 825254863Sdumbbell/** 826254863Sdumbbell * ttm_bo_reserve_slowpath_nolru: 827254863Sdumbbell * @bo: A pointer to a struct ttm_buffer_object. 828254863Sdumbbell * @interruptible: Sleep interruptible if waiting. 829254863Sdumbbell * @sequence: Set (@bo)->sequence to this value after lock 830254863Sdumbbell * 831254863Sdumbbell * This is called after ttm_bo_reserve returns -EAGAIN and we backed off 832254863Sdumbbell * from all our other reservations. Because there are no other reservations 833254863Sdumbbell * held by us, this function cannot deadlock any more. 834254863Sdumbbell * 835254863Sdumbbell * Will not remove reserved buffers from the lru lists. 836254863Sdumbbell * Otherwise identical to ttm_bo_reserve_slowpath. 837254863Sdumbbell */ 838254863Sdumbbellextern int ttm_bo_reserve_slowpath_nolru(struct ttm_buffer_object *bo, 839254863Sdumbbell bool interruptible, 840254863Sdumbbell uint32_t sequence); 841247835Skib 842254863Sdumbbell 843247835Skib/** 844254863Sdumbbell * ttm_bo_reserve_slowpath: 845254863Sdumbbell * @bo: A pointer to a struct ttm_buffer_object. 846254863Sdumbbell * @interruptible: Sleep interruptible if waiting. 847254863Sdumbbell * @sequence: Set (@bo)->sequence to this value after lock 848254863Sdumbbell * 849254863Sdumbbell * This is called after ttm_bo_reserve returns -EAGAIN and we backed off 850254863Sdumbbell * from all our other reservations. Because there are no other reservations 851254863Sdumbbell * held by us, this function cannot deadlock any more. 852254863Sdumbbell */ 853254863Sdumbbellextern int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo, 854254863Sdumbbell bool interruptible, uint32_t sequence); 855254863Sdumbbell 856254863Sdumbbell/** 857254861Sdumbbell * ttm_bo_reserve_nolru: 858247835Skib * 859247835Skib * @bo: A pointer to a struct ttm_buffer_object. 860247835Skib * @interruptible: Sleep interruptible if waiting. 861247835Skib * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY. 862247835Skib * @use_sequence: If @bo is already reserved, Only sleep waiting for 863247835Skib * it to become unreserved if @sequence < (@bo)->sequence. 864247835Skib * 865254861Sdumbbell * Will not remove reserved buffers from the lru lists. 866247835Skib * Otherwise identical to ttm_bo_reserve. 867247835Skib * 868247835Skib * Returns: 869247835Skib * -EAGAIN: The reservation may cause a deadlock. 870247835Skib * Release all buffer reservations, wait for @bo to become unreserved and 871247835Skib * try again. (only if use_sequence == 1). 872247835Skib * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by 873247835Skib * a signal. Release all buffer reservations and return to user-space. 874247835Skib * -EBUSY: The function needed to sleep, but @no_wait was true 875247835Skib * -EDEADLK: Bo already reserved using @sequence. This error code will only 876247835Skib * be returned if @use_sequence is set to true. 877247835Skib */ 878254861Sdumbbellextern int ttm_bo_reserve_nolru(struct ttm_buffer_object *bo, 879247835Skib bool interruptible, 880247835Skib bool no_wait, bool use_sequence, 881247835Skib uint32_t sequence); 882247835Skib 883247835Skib/** 884247835Skib * ttm_bo_unreserve 885247835Skib * 886247835Skib * @bo: A pointer to a struct ttm_buffer_object. 887247835Skib * 888247835Skib * Unreserve a previous reservation of @bo. 889247835Skib */ 890247835Skibextern void ttm_bo_unreserve(struct ttm_buffer_object *bo); 891247835Skib 892247835Skib/** 893247835Skib * ttm_bo_unreserve_locked 894247835Skib * 895247835Skib * @bo: A pointer to a struct ttm_buffer_object. 896247835Skib * 897247835Skib * Unreserve a previous reservation of @bo. 898247835Skib * Needs to be called with struct ttm_bo_global::lru_lock held. 899247835Skib */ 900247835Skibextern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo); 901247835Skib 902247835Skib/* 903247835Skib * ttm_bo_util.c 904247835Skib */ 905247835Skib 906247835Skib/** 907247835Skib * ttm_bo_move_ttm 908247835Skib * 909247835Skib * @bo: A pointer to a struct ttm_buffer_object. 910247835Skib * @evict: 1: This is an eviction. Don't try to pipeline. 911247835Skib * @no_wait_gpu: Return immediately if the GPU is busy. 912247835Skib * @new_mem: struct ttm_mem_reg indicating where to move. 913247835Skib * 914247835Skib * Optimized move function for a buffer object with both old and 915247835Skib * new placement backed by a TTM. The function will, if successful, 916247835Skib * free any old aperture space, and set (@new_mem)->mm_node to NULL, 917247835Skib * and update the (@bo)->mem placement flags. If unsuccessful, the old 918247835Skib * data remains untouched, and it's up to the caller to free the 919247835Skib * memory space indicated by @new_mem. 920247835Skib * Returns: 921247835Skib * !0: Failure. 922247835Skib */ 923247835Skib 924247835Skibextern int ttm_bo_move_ttm(struct ttm_buffer_object *bo, 925247835Skib bool evict, bool no_wait_gpu, 926247835Skib struct ttm_mem_reg *new_mem); 927247835Skib 928247835Skib/** 929247835Skib * ttm_bo_move_memcpy 930247835Skib * 931247835Skib * @bo: A pointer to a struct ttm_buffer_object. 932247835Skib * @evict: 1: This is an eviction. Don't try to pipeline. 933247835Skib * @no_wait_gpu: Return immediately if the GPU is busy. 934247835Skib * @new_mem: struct ttm_mem_reg indicating where to move. 935247835Skib * 936247835Skib * Fallback move function for a mappable buffer object in mappable memory. 937247835Skib * The function will, if successful, 938247835Skib * free any old aperture space, and set (@new_mem)->mm_node to NULL, 939247835Skib * and update the (@bo)->mem placement flags. If unsuccessful, the old 940247835Skib * data remains untouched, and it's up to the caller to free the 941247835Skib * memory space indicated by @new_mem. 942247835Skib * Returns: 943247835Skib * !0: Failure. 944247835Skib */ 945247835Skib 946247835Skibextern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, 947247835Skib bool evict, bool no_wait_gpu, 948247835Skib struct ttm_mem_reg *new_mem); 949247835Skib 950247835Skib/** 951247835Skib * ttm_bo_free_old_node 952247835Skib * 953247835Skib * @bo: A pointer to a struct ttm_buffer_object. 954247835Skib * 955247835Skib * Utility function to free an old placement after a successful move. 956247835Skib */ 957247835Skibextern void ttm_bo_free_old_node(struct ttm_buffer_object *bo); 958247835Skib 959247835Skib/** 960247835Skib * ttm_bo_move_accel_cleanup. 961247835Skib * 962247835Skib * @bo: A pointer to a struct ttm_buffer_object. 963247835Skib * @sync_obj: A sync object that signals when moving is complete. 964247835Skib * @evict: This is an evict move. Don't return until the buffer is idle. 965247835Skib * @no_wait_gpu: Return immediately if the GPU is busy. 966247835Skib * @new_mem: struct ttm_mem_reg indicating where to move. 967247835Skib * 968247835Skib * Accelerated move function to be called when an accelerated move 969247835Skib * has been scheduled. The function will create a new temporary buffer object 970247835Skib * representing the old placement, and put the sync object on both buffer 971247835Skib * objects. After that the newly created buffer object is unref'd to be 972247835Skib * destroyed when the move is complete. This will help pipeline 973247835Skib * buffer moves. 974247835Skib */ 975247835Skib 976247835Skibextern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, 977247835Skib void *sync_obj, 978247835Skib bool evict, bool no_wait_gpu, 979247835Skib struct ttm_mem_reg *new_mem); 980247835Skib/** 981247835Skib * ttm_io_prot 982247835Skib * 983247835Skib * @c_state: Caching state. 984247835Skib * @tmp: Page protection flag for a normal, cached mapping. 985247835Skib * 986247835Skib * Utility function that returns the pgprot_t that should be used for 987247835Skib * setting up a PTE with the caching model indicated by @c_state. 988247835Skib */ 989247835Skibextern vm_memattr_t ttm_io_prot(uint32_t caching_flags); 990247835Skib 991247835Skibextern const struct ttm_mem_type_manager_func ttm_bo_manager_func; 992247835Skib 993247835Skib#if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE))) 994247835Skib#define TTM_HAS_AGP 995247835Skib#include <linux/agp_backend.h> 996247835Skib 997247835Skib/** 998247835Skib * ttm_agp_tt_create 999247835Skib * 1000247835Skib * @bdev: Pointer to a struct ttm_bo_device. 1001247835Skib * @bridge: The agp bridge this device is sitting on. 1002247835Skib * @size: Size of the data needed backing. 1003247835Skib * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags. 1004247835Skib * @dummy_read_page: See struct ttm_bo_device. 1005247835Skib * 1006247835Skib * 1007247835Skib * Create a TTM backend that uses the indicated AGP bridge as an aperture 1008247835Skib * for TT memory. This function uses the linux agpgart interface to 1009247835Skib * bind and unbind memory backing a ttm_tt. 1010247835Skib */ 1011247835Skibextern struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev, 1012247835Skib struct agp_bridge_data *bridge, 1013247835Skib unsigned long size, uint32_t page_flags, 1014247835Skib struct vm_page *dummy_read_page); 1015247835Skibint ttm_agp_tt_populate(struct ttm_tt *ttm); 1016247835Skibvoid ttm_agp_tt_unpopulate(struct ttm_tt *ttm); 1017247835Skib#endif 1018247835Skib 1019247835Skibint ttm_bo_cmp_rb_tree_items(struct ttm_buffer_object *a, 1020247835Skib struct ttm_buffer_object *b); 1021247835Skib 1022247835SkibRB_PROTOTYPE(ttm_bo_device_buffer_objects, ttm_buffer_object, vm_rb, 1023247835Skib ttm_bo_cmp_rb_tree_items); 1024247835Skib 1025247835Skib#endif 1026