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ba4e7d97 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | /* | |
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
29 | */ | |
30 | #ifndef _TTM_BO_DRIVER_H_ | |
31 | #define _TTM_BO_DRIVER_H_ | |
32 | ||
33 | #include "ttm/ttm_bo_api.h" | |
34 | #include "ttm/ttm_memory.h" | |
a987fcaa | 35 | #include "ttm/ttm_module.h" |
ba4e7d97 | 36 | #include "drm_mm.h" |
ba4420c2 | 37 | #include "drm_global.h" |
ba4e7d97 TH |
38 | #include "linux/workqueue.h" |
39 | #include "linux/fs.h" | |
40 | #include "linux/spinlock.h" | |
41 | ||
42 | struct ttm_backend; | |
43 | ||
44 | struct ttm_backend_func { | |
45 | /** | |
46 | * struct ttm_backend_func member populate | |
47 | * | |
48 | * @backend: Pointer to a struct ttm_backend. | |
49 | * @num_pages: Number of pages to populate. | |
50 | * @pages: Array of pointers to ttm pages. | |
51 | * @dummy_read_page: Page to be used instead of NULL pages in the | |
52 | * array @pages. | |
27e8b237 | 53 | * @dma_addrs: Array of DMA (bus) address of the ttm pages. |
ba4e7d97 TH |
54 | * |
55 | * Populate the backend with ttm pages. Depending on the backend, | |
56 | * it may or may not copy the @pages array. | |
57 | */ | |
58 | int (*populate) (struct ttm_backend *backend, | |
59 | unsigned long num_pages, struct page **pages, | |
27e8b237 KRW |
60 | struct page *dummy_read_page, |
61 | dma_addr_t *dma_addrs); | |
ba4e7d97 TH |
62 | /** |
63 | * struct ttm_backend_func member clear | |
64 | * | |
65 | * @backend: Pointer to a struct ttm_backend. | |
66 | * | |
67 | * This is an "unpopulate" function. Release all resources | |
68 | * allocated with populate. | |
69 | */ | |
70 | void (*clear) (struct ttm_backend *backend); | |
71 | ||
72 | /** | |
73 | * struct ttm_backend_func member bind | |
74 | * | |
75 | * @backend: Pointer to a struct ttm_backend. | |
76 | * @bo_mem: Pointer to a struct ttm_mem_reg describing the | |
77 | * memory type and location for binding. | |
78 | * | |
79 | * Bind the backend pages into the aperture in the location | |
80 | * indicated by @bo_mem. This function should be able to handle | |
81 | * differences between aperture- and system page sizes. | |
82 | */ | |
83 | int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem); | |
84 | ||
85 | /** | |
86 | * struct ttm_backend_func member unbind | |
87 | * | |
88 | * @backend: Pointer to a struct ttm_backend. | |
89 | * | |
90 | * Unbind previously bound backend pages. This function should be | |
91 | * able to handle differences between aperture- and system page sizes. | |
92 | */ | |
93 | int (*unbind) (struct ttm_backend *backend); | |
94 | ||
95 | /** | |
96 | * struct ttm_backend_func member destroy | |
97 | * | |
98 | * @backend: Pointer to a struct ttm_backend. | |
99 | * | |
100 | * Destroy the backend. | |
101 | */ | |
102 | void (*destroy) (struct ttm_backend *backend); | |
103 | }; | |
104 | ||
105 | /** | |
106 | * struct ttm_backend | |
107 | * | |
108 | * @bdev: Pointer to a struct ttm_bo_device. | |
109 | * @flags: For driver use. | |
110 | * @func: Pointer to a struct ttm_backend_func that describes | |
111 | * the backend methods. | |
112 | * | |
113 | */ | |
114 | ||
115 | struct ttm_backend { | |
116 | struct ttm_bo_device *bdev; | |
117 | uint32_t flags; | |
118 | struct ttm_backend_func *func; | |
119 | }; | |
120 | ||
ba4e7d97 TH |
121 | #define TTM_PAGE_FLAG_USER (1 << 1) |
122 | #define TTM_PAGE_FLAG_USER_DIRTY (1 << 2) | |
123 | #define TTM_PAGE_FLAG_WRITE (1 << 3) | |
124 | #define TTM_PAGE_FLAG_SWAPPED (1 << 4) | |
125 | #define TTM_PAGE_FLAG_PERSISTANT_SWAP (1 << 5) | |
126 | #define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6) | |
ad49f501 | 127 | #define TTM_PAGE_FLAG_DMA32 (1 << 7) |
ba4e7d97 TH |
128 | |
129 | enum ttm_caching_state { | |
130 | tt_uncached, | |
131 | tt_wc, | |
132 | tt_cached | |
133 | }; | |
134 | ||
135 | /** | |
136 | * struct ttm_tt | |
137 | * | |
138 | * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL | |
139 | * pointer. | |
140 | * @pages: Array of pages backing the data. | |
141 | * @first_himem_page: Himem pages are put last in the page array, which | |
142 | * enables us to run caching attribute changes on only the first part | |
143 | * of the page array containing lomem pages. This is the index of the | |
144 | * first himem page. | |
145 | * @last_lomem_page: Index of the last lomem page in the page array. | |
146 | * @num_pages: Number of pages in the page array. | |
147 | * @bdev: Pointer to the current struct ttm_bo_device. | |
148 | * @be: Pointer to the ttm backend. | |
149 | * @tsk: The task for user ttm. | |
150 | * @start: virtual address for user ttm. | |
151 | * @swap_storage: Pointer to shmem struct file for swap storage. | |
152 | * @caching_state: The current caching state of the pages. | |
153 | * @state: The current binding state of the pages. | |
f9820a46 | 154 | * @dma_address: The DMA (bus) addresses of the pages (if TTM_PAGE_FLAG_DMA32) |
ba4e7d97 TH |
155 | * |
156 | * This is a structure holding the pages, caching- and aperture binding | |
157 | * status for a buffer object that isn't backed by fixed (VRAM / AGP) | |
158 | * memory. | |
159 | */ | |
160 | ||
161 | struct ttm_tt { | |
162 | struct page *dummy_read_page; | |
163 | struct page **pages; | |
164 | long first_himem_page; | |
165 | long last_lomem_page; | |
166 | uint32_t page_flags; | |
167 | unsigned long num_pages; | |
a987fcaa | 168 | struct ttm_bo_global *glob; |
ba4e7d97 TH |
169 | struct ttm_backend *be; |
170 | struct task_struct *tsk; | |
171 | unsigned long start; | |
172 | struct file *swap_storage; | |
173 | enum ttm_caching_state caching_state; | |
174 | enum { | |
175 | tt_bound, | |
176 | tt_unbound, | |
177 | tt_unpopulated, | |
178 | } state; | |
f9820a46 | 179 | dma_addr_t *dma_address; |
ba4e7d97 TH |
180 | }; |
181 | ||
182 | #define TTM_MEMTYPE_FLAG_FIXED (1 << 0) /* Fixed (on-card) PCI memory */ | |
183 | #define TTM_MEMTYPE_FLAG_MAPPABLE (1 << 1) /* Memory mappable */ | |
ba4e7d97 TH |
184 | #define TTM_MEMTYPE_FLAG_CMA (1 << 3) /* Can't map aperture */ |
185 | ||
d961db75 BS |
186 | struct ttm_mem_type_manager; |
187 | ||
188 | struct ttm_mem_type_manager_func { | |
3205bc24 TH |
189 | /** |
190 | * struct ttm_mem_type_manager member init | |
191 | * | |
192 | * @man: Pointer to a memory type manager. | |
193 | * @p_size: Implementation dependent, but typically the size of the | |
194 | * range to be managed in pages. | |
195 | * | |
196 | * Called to initialize a private range manager. The function is | |
197 | * expected to initialize the man::priv member. | |
198 | * Returns 0 on success, negative error code on failure. | |
199 | */ | |
d961db75 | 200 | int (*init)(struct ttm_mem_type_manager *man, unsigned long p_size); |
3205bc24 TH |
201 | |
202 | /** | |
203 | * struct ttm_mem_type_manager member takedown | |
204 | * | |
205 | * @man: Pointer to a memory type manager. | |
206 | * | |
207 | * Called to undo the setup done in init. All allocated resources | |
208 | * should be freed. | |
209 | */ | |
d961db75 | 210 | int (*takedown)(struct ttm_mem_type_manager *man); |
3205bc24 TH |
211 | |
212 | /** | |
213 | * struct ttm_mem_type_manager member get_node | |
214 | * | |
215 | * @man: Pointer to a memory type manager. | |
216 | * @bo: Pointer to the buffer object we're allocating space for. | |
217 | * @placement: Placement details. | |
218 | * @mem: Pointer to a struct ttm_mem_reg to be filled in. | |
219 | * | |
220 | * This function should allocate space in the memory type managed | |
221 | * by @man. Placement details if | |
222 | * applicable are given by @placement. If successful, | |
223 | * @mem::mm_node should be set to a non-null value, and | |
224 | * @mem::start should be set to a value identifying the beginning | |
225 | * of the range allocated, and the function should return zero. | |
25985edc | 226 | * If the memory region accommodate the buffer object, @mem::mm_node |
3205bc24 | 227 | * should be set to NULL, and the function should return 0. |
25985edc | 228 | * If a system error occurred, preventing the request to be fulfilled, |
3205bc24 TH |
229 | * the function should return a negative error code. |
230 | * | |
231 | * Note that @mem::mm_node will only be dereferenced by | |
232 | * struct ttm_mem_type_manager functions and optionally by the driver, | |
233 | * which has knowledge of the underlying type. | |
234 | * | |
235 | * This function may not be called from within atomic context, so | |
236 | * an implementation can and must use either a mutex or a spinlock to | |
237 | * protect any data structures managing the space. | |
238 | */ | |
d961db75 BS |
239 | int (*get_node)(struct ttm_mem_type_manager *man, |
240 | struct ttm_buffer_object *bo, | |
241 | struct ttm_placement *placement, | |
242 | struct ttm_mem_reg *mem); | |
3205bc24 TH |
243 | |
244 | /** | |
245 | * struct ttm_mem_type_manager member put_node | |
246 | * | |
247 | * @man: Pointer to a memory type manager. | |
248 | * @mem: Pointer to a struct ttm_mem_reg to be filled in. | |
249 | * | |
250 | * This function frees memory type resources previously allocated | |
251 | * and that are identified by @mem::mm_node and @mem::start. May not | |
252 | * be called from within atomic context. | |
253 | */ | |
d961db75 BS |
254 | void (*put_node)(struct ttm_mem_type_manager *man, |
255 | struct ttm_mem_reg *mem); | |
3205bc24 TH |
256 | |
257 | /** | |
258 | * struct ttm_mem_type_manager member debug | |
259 | * | |
260 | * @man: Pointer to a memory type manager. | |
261 | * @prefix: Prefix to be used in printout to identify the caller. | |
262 | * | |
263 | * This function is called to print out the state of the memory | |
264 | * type manager to aid debugging of out-of-memory conditions. | |
265 | * It may not be called from within atomic context. | |
266 | */ | |
d961db75 BS |
267 | void (*debug)(struct ttm_mem_type_manager *man, const char *prefix); |
268 | }; | |
269 | ||
eba67093 TH |
270 | /** |
271 | * struct ttm_mem_type_manager | |
272 | * | |
273 | * @has_type: The memory type has been initialized. | |
274 | * @use_type: The memory type is enabled. | |
275 | * @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory | |
276 | * managed by this memory type. | |
277 | * @gpu_offset: If used, the GPU offset of the first managed page of | |
278 | * fixed memory or the first managed location in an aperture. | |
279 | * @size: Size of the managed region. | |
280 | * @available_caching: A mask of available caching types, TTM_PL_FLAG_XX, | |
281 | * as defined in ttm_placement_common.h | |
282 | * @default_caching: The default caching policy used for a buffer object | |
283 | * placed in this memory type if the user doesn't provide one. | |
284 | * @func: structure pointer implementing the range manager. See above | |
285 | * @priv: Driver private closure for @func. | |
286 | * @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures | |
287 | * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions | |
288 | * reserved by the TTM vm system. | |
289 | * @io_reserve_lru: Optional lru list for unreserving io mem regions. | |
290 | * @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain | |
291 | * static information. bdev::driver::io_mem_free is never used. | |
292 | * @lru: The lru list for this memory type. | |
293 | * | |
294 | * This structure is used to identify and manage memory types for a device. | |
295 | * It's set up by the ttm_bo_driver::init_mem_type method. | |
296 | */ | |
297 | ||
298 | ||
299 | ||
ba4e7d97 | 300 | struct ttm_mem_type_manager { |
d961db75 | 301 | struct ttm_bo_device *bdev; |
ba4e7d97 TH |
302 | |
303 | /* | |
304 | * No protection. Constant from start. | |
305 | */ | |
306 | ||
307 | bool has_type; | |
308 | bool use_type; | |
309 | uint32_t flags; | |
310 | unsigned long gpu_offset; | |
ba4e7d97 TH |
311 | uint64_t size; |
312 | uint32_t available_caching; | |
313 | uint32_t default_caching; | |
3205bc24 TH |
314 | const struct ttm_mem_type_manager_func *func; |
315 | void *priv; | |
eba67093 TH |
316 | struct mutex io_reserve_mutex; |
317 | bool use_io_reserve_lru; | |
318 | bool io_reserve_fastpath; | |
319 | ||
320 | /* | |
321 | * Protected by @io_reserve_mutex: | |
322 | */ | |
323 | ||
324 | struct list_head io_reserve_lru; | |
ba4e7d97 TH |
325 | |
326 | /* | |
3205bc24 | 327 | * Protected by the global->lru_lock. |
ba4e7d97 | 328 | */ |
3205bc24 | 329 | |
ba4e7d97 TH |
330 | struct list_head lru; |
331 | }; | |
332 | ||
333 | /** | |
334 | * struct ttm_bo_driver | |
335 | * | |
ba4e7d97 TH |
336 | * @create_ttm_backend_entry: Callback to create a struct ttm_backend. |
337 | * @invalidate_caches: Callback to invalidate read caches when a buffer object | |
338 | * has been evicted. | |
339 | * @init_mem_type: Callback to initialize a struct ttm_mem_type_manager | |
340 | * structure. | |
341 | * @evict_flags: Callback to obtain placement flags when a buffer is evicted. | |
342 | * @move: Callback for a driver to hook in accelerated functions to | |
343 | * move a buffer. | |
344 | * If set to NULL, a potentially slow memcpy() move is used. | |
345 | * @sync_obj_signaled: See ttm_fence_api.h | |
346 | * @sync_obj_wait: See ttm_fence_api.h | |
347 | * @sync_obj_flush: See ttm_fence_api.h | |
348 | * @sync_obj_unref: See ttm_fence_api.h | |
349 | * @sync_obj_ref: See ttm_fence_api.h | |
350 | */ | |
351 | ||
352 | struct ttm_bo_driver { | |
ba4e7d97 TH |
353 | /** |
354 | * struct ttm_bo_driver member create_ttm_backend_entry | |
355 | * | |
356 | * @bdev: The buffer object device. | |
357 | * | |
358 | * Create a driver specific struct ttm_backend. | |
359 | */ | |
360 | ||
361 | struct ttm_backend *(*create_ttm_backend_entry) | |
362 | (struct ttm_bo_device *bdev); | |
363 | ||
364 | /** | |
365 | * struct ttm_bo_driver member invalidate_caches | |
366 | * | |
367 | * @bdev: the buffer object device. | |
368 | * @flags: new placement of the rebound buffer object. | |
369 | * | |
370 | * A previosly evicted buffer has been rebound in a | |
371 | * potentially new location. Tell the driver that it might | |
372 | * consider invalidating read (texture) caches on the next command | |
373 | * submission as a consequence. | |
374 | */ | |
375 | ||
376 | int (*invalidate_caches) (struct ttm_bo_device *bdev, uint32_t flags); | |
377 | int (*init_mem_type) (struct ttm_bo_device *bdev, uint32_t type, | |
378 | struct ttm_mem_type_manager *man); | |
379 | /** | |
380 | * struct ttm_bo_driver member evict_flags: | |
381 | * | |
382 | * @bo: the buffer object to be evicted | |
383 | * | |
384 | * Return the bo flags for a buffer which is not mapped to the hardware. | |
385 | * These will be placed in proposed_flags so that when the move is | |
386 | * finished, they'll end up in bo->mem.flags | |
387 | */ | |
388 | ||
ca262a99 JG |
389 | void(*evict_flags) (struct ttm_buffer_object *bo, |
390 | struct ttm_placement *placement); | |
ba4e7d97 TH |
391 | /** |
392 | * struct ttm_bo_driver member move: | |
393 | * | |
394 | * @bo: the buffer to move | |
395 | * @evict: whether this motion is evicting the buffer from | |
396 | * the graphics address space | |
397 | * @interruptible: Use interruptible sleeps if possible when sleeping. | |
398 | * @no_wait: whether this should give up and return -EBUSY | |
399 | * if this move would require sleeping | |
400 | * @new_mem: the new memory region receiving the buffer | |
401 | * | |
402 | * Move a buffer between two memory regions. | |
403 | */ | |
404 | int (*move) (struct ttm_buffer_object *bo, | |
405 | bool evict, bool interruptible, | |
9d87fa21 JG |
406 | bool no_wait_reserve, bool no_wait_gpu, |
407 | struct ttm_mem_reg *new_mem); | |
ba4e7d97 TH |
408 | |
409 | /** | |
410 | * struct ttm_bo_driver_member verify_access | |
411 | * | |
412 | * @bo: Pointer to a buffer object. | |
413 | * @filp: Pointer to a struct file trying to access the object. | |
414 | * | |
415 | * Called from the map / write / read methods to verify that the | |
416 | * caller is permitted to access the buffer object. | |
417 | * This member may be set to NULL, which will refuse this kind of | |
418 | * access for all buffer objects. | |
419 | * This function should return 0 if access is granted, -EPERM otherwise. | |
420 | */ | |
421 | int (*verify_access) (struct ttm_buffer_object *bo, | |
422 | struct file *filp); | |
423 | ||
424 | /** | |
425 | * In case a driver writer dislikes the TTM fence objects, | |
426 | * the driver writer can replace those with sync objects of | |
427 | * his / her own. If it turns out that no driver writer is | |
428 | * using these. I suggest we remove these hooks and plug in | |
429 | * fences directly. The bo driver needs the following functionality: | |
430 | * See the corresponding functions in the fence object API | |
431 | * documentation. | |
432 | */ | |
433 | ||
434 | bool (*sync_obj_signaled) (void *sync_obj, void *sync_arg); | |
435 | int (*sync_obj_wait) (void *sync_obj, void *sync_arg, | |
436 | bool lazy, bool interruptible); | |
437 | int (*sync_obj_flush) (void *sync_obj, void *sync_arg); | |
438 | void (*sync_obj_unref) (void **sync_obj); | |
439 | void *(*sync_obj_ref) (void *sync_obj); | |
e024e110 DA |
440 | |
441 | /* hook to notify driver about a driver move so it | |
442 | * can do tiling things */ | |
443 | void (*move_notify)(struct ttm_buffer_object *bo, | |
444 | struct ttm_mem_reg *new_mem); | |
445 | /* notify the driver we are taking a fault on this BO | |
446 | * and have reserved it */ | |
82c5da6b | 447 | int (*fault_reserve_notify)(struct ttm_buffer_object *bo); |
3f09ea4e TH |
448 | |
449 | /** | |
450 | * notify the driver that we're about to swap out this bo | |
451 | */ | |
452 | void (*swap_notify) (struct ttm_buffer_object *bo); | |
82c5da6b JG |
453 | |
454 | /** | |
455 | * Driver callback on when mapping io memory (for bo_move_memcpy | |
456 | * for instance). TTM will take care to call io_mem_free whenever | |
457 | * the mapping is not use anymore. io_mem_reserve & io_mem_free | |
458 | * are balanced. | |
459 | */ | |
460 | int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem); | |
461 | void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem); | |
ba4e7d97 TH |
462 | }; |
463 | ||
a987fcaa TH |
464 | /** |
465 | * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global. | |
466 | */ | |
467 | ||
468 | struct ttm_bo_global_ref { | |
ba4420c2 | 469 | struct drm_global_reference ref; |
a987fcaa TH |
470 | struct ttm_mem_global *mem_glob; |
471 | }; | |
ba4e7d97 | 472 | |
ba4e7d97 | 473 | /** |
a987fcaa | 474 | * struct ttm_bo_global - Buffer object driver global data. |
ba4e7d97 TH |
475 | * |
476 | * @mem_glob: Pointer to a struct ttm_mem_global object for accounting. | |
ba4e7d97 TH |
477 | * @dummy_read_page: Pointer to a dummy page used for mapping requests |
478 | * of unpopulated pages. | |
a987fcaa | 479 | * @shrink: A shrink callback object used for buffer object swap. |
ba4e7d97 TH |
480 | * @ttm_bo_extra_size: Extra size (sizeof(struct ttm_buffer_object) excluded) |
481 | * used by a buffer object. This is excluding page arrays and backing pages. | |
482 | * @ttm_bo_size: This is @ttm_bo_extra_size + sizeof(struct ttm_buffer_object). | |
a987fcaa TH |
483 | * @device_list_mutex: Mutex protecting the device list. |
484 | * This mutex is held while traversing the device list for pm options. | |
485 | * @lru_lock: Spinlock protecting the bo subsystem lru lists. | |
486 | * @device_list: List of buffer object devices. | |
487 | * @swap_lru: Lru list of buffer objects used for swapping. | |
488 | */ | |
489 | ||
490 | struct ttm_bo_global { | |
491 | ||
492 | /** | |
493 | * Constant after init. | |
494 | */ | |
495 | ||
496 | struct kobject kobj; | |
497 | struct ttm_mem_global *mem_glob; | |
498 | struct page *dummy_read_page; | |
499 | struct ttm_mem_shrink shrink; | |
500 | size_t ttm_bo_extra_size; | |
501 | size_t ttm_bo_size; | |
502 | struct mutex device_list_mutex; | |
503 | spinlock_t lru_lock; | |
504 | ||
505 | /** | |
506 | * Protected by device_list_mutex. | |
507 | */ | |
508 | struct list_head device_list; | |
509 | ||
510 | /** | |
511 | * Protected by the lru_lock. | |
512 | */ | |
513 | struct list_head swap_lru; | |
514 | ||
515 | /** | |
516 | * Internal protection. | |
517 | */ | |
518 | atomic_t bo_count; | |
519 | }; | |
520 | ||
521 | ||
522 | #define TTM_NUM_MEM_TYPES 8 | |
523 | ||
524 | #define TTM_BO_PRIV_FLAG_MOVING 0 /* Buffer object is moving and needs | |
525 | idling before CPU mapping */ | |
526 | #define TTM_BO_PRIV_FLAG_MAX 1 | |
527 | /** | |
528 | * struct ttm_bo_device - Buffer object driver device-specific data. | |
529 | * | |
530 | * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver. | |
ba4e7d97 | 531 | * @man: An array of mem_type_managers. |
702adba2 TH |
532 | * @fence_lock: Protects the synchronizing members on *all* bos belonging |
533 | * to this device. | |
ba4e7d97 TH |
534 | * @addr_space_mm: Range manager for the device address space. |
535 | * lru_lock: Spinlock that protects the buffer+device lru lists and | |
536 | * ddestroy lists. | |
65705962 | 537 | * @val_seq: Current validation sequence. |
ba4e7d97 TH |
538 | * @nice_mode: Try nicely to wait for buffer idle when cleaning a manager. |
539 | * If a GPU lockup has been detected, this is forced to 0. | |
540 | * @dev_mapping: A pointer to the struct address_space representing the | |
541 | * device address space. | |
542 | * @wq: Work queue structure for the delayed delete workqueue. | |
543 | * | |
544 | */ | |
545 | ||
546 | struct ttm_bo_device { | |
547 | ||
548 | /* | |
549 | * Constant after bo device init / atomic. | |
550 | */ | |
a987fcaa TH |
551 | struct list_head device_list; |
552 | struct ttm_bo_global *glob; | |
ba4e7d97 | 553 | struct ttm_bo_driver *driver; |
ba4e7d97 | 554 | rwlock_t vm_lock; |
a987fcaa | 555 | struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES]; |
702adba2 | 556 | spinlock_t fence_lock; |
ba4e7d97 TH |
557 | /* |
558 | * Protected by the vm lock. | |
559 | */ | |
ba4e7d97 TH |
560 | struct rb_root addr_space_rb; |
561 | struct drm_mm addr_space_mm; | |
562 | ||
563 | /* | |
a987fcaa | 564 | * Protected by the global:lru lock. |
ba4e7d97 TH |
565 | */ |
566 | struct list_head ddestroy; | |
65705962 | 567 | uint32_t val_seq; |
ba4e7d97 TH |
568 | |
569 | /* | |
570 | * Protected by load / firstopen / lastclose /unload sync. | |
571 | */ | |
572 | ||
573 | bool nice_mode; | |
574 | struct address_space *dev_mapping; | |
575 | ||
576 | /* | |
577 | * Internal protection. | |
578 | */ | |
579 | ||
580 | struct delayed_work wq; | |
ad49f501 DA |
581 | |
582 | bool need_dma32; | |
ba4e7d97 TH |
583 | }; |
584 | ||
585 | /** | |
586 | * ttm_flag_masked | |
587 | * | |
588 | * @old: Pointer to the result and original value. | |
589 | * @new: New value of bits. | |
590 | * @mask: Mask of bits to change. | |
591 | * | |
592 | * Convenience function to change a number of bits identified by a mask. | |
593 | */ | |
594 | ||
595 | static inline uint32_t | |
596 | ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask) | |
597 | { | |
598 | *old ^= (*old ^ new) & mask; | |
599 | return *old; | |
600 | } | |
601 | ||
602 | /** | |
603 | * ttm_tt_create | |
604 | * | |
605 | * @bdev: pointer to a struct ttm_bo_device: | |
606 | * @size: Size of the data needed backing. | |
607 | * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags. | |
608 | * @dummy_read_page: See struct ttm_bo_device. | |
609 | * | |
610 | * Create a struct ttm_tt to back data with system memory pages. | |
611 | * No pages are actually allocated. | |
612 | * Returns: | |
613 | * NULL: Out of memory. | |
614 | */ | |
615 | extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, | |
616 | unsigned long size, | |
617 | uint32_t page_flags, | |
618 | struct page *dummy_read_page); | |
619 | ||
620 | /** | |
621 | * ttm_tt_set_user: | |
622 | * | |
623 | * @ttm: The struct ttm_tt to populate. | |
624 | * @tsk: A struct task_struct for which @start is a valid user-space address. | |
625 | * @start: A valid user-space address. | |
626 | * @num_pages: Size in pages of the user memory area. | |
627 | * | |
628 | * Populate a struct ttm_tt with a user-space memory area after first pinning | |
629 | * the pages backing it. | |
630 | * Returns: | |
631 | * !0: Error. | |
632 | */ | |
633 | ||
634 | extern int ttm_tt_set_user(struct ttm_tt *ttm, | |
635 | struct task_struct *tsk, | |
636 | unsigned long start, unsigned long num_pages); | |
637 | ||
638 | /** | |
639 | * ttm_ttm_bind: | |
640 | * | |
641 | * @ttm: The struct ttm_tt containing backing pages. | |
642 | * @bo_mem: The struct ttm_mem_reg identifying the binding location. | |
643 | * | |
644 | * Bind the pages of @ttm to an aperture location identified by @bo_mem | |
645 | */ | |
646 | extern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem); | |
647 | ||
4bfd75cb TH |
648 | /** |
649 | * ttm_tt_populate: | |
650 | * | |
651 | * @ttm: The struct ttm_tt to contain the backing pages. | |
652 | * | |
653 | * Add backing pages to all of @ttm | |
654 | */ | |
655 | extern int ttm_tt_populate(struct ttm_tt *ttm); | |
656 | ||
ba4e7d97 TH |
657 | /** |
658 | * ttm_ttm_destroy: | |
659 | * | |
660 | * @ttm: The struct ttm_tt. | |
661 | * | |
662 | * Unbind, unpopulate and destroy a struct ttm_tt. | |
663 | */ | |
664 | extern void ttm_tt_destroy(struct ttm_tt *ttm); | |
665 | ||
666 | /** | |
667 | * ttm_ttm_unbind: | |
668 | * | |
669 | * @ttm: The struct ttm_tt. | |
670 | * | |
671 | * Unbind a struct ttm_tt. | |
672 | */ | |
673 | extern void ttm_tt_unbind(struct ttm_tt *ttm); | |
674 | ||
675 | /** | |
676 | * ttm_ttm_destroy: | |
677 | * | |
678 | * @ttm: The struct ttm_tt. | |
679 | * @index: Index of the desired page. | |
680 | * | |
681 | * Return a pointer to the struct page backing @ttm at page | |
682 | * index @index. If the page is unpopulated, one will be allocated to | |
683 | * populate that index. | |
684 | * | |
685 | * Returns: | |
686 | * NULL on OOM. | |
687 | */ | |
688 | extern struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index); | |
689 | ||
690 | /** | |
691 | * ttm_tt_cache_flush: | |
692 | * | |
693 | * @pages: An array of pointers to struct page:s to flush. | |
694 | * @num_pages: Number of pages to flush. | |
695 | * | |
696 | * Flush the data of the indicated pages from the cpu caches. | |
697 | * This is used when changing caching attributes of the pages from | |
698 | * cache-coherent. | |
699 | */ | |
700 | extern void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages); | |
701 | ||
702 | /** | |
703 | * ttm_tt_set_placement_caching: | |
704 | * | |
705 | * @ttm A struct ttm_tt the backing pages of which will change caching policy. | |
706 | * @placement: Flag indicating the desired caching policy. | |
707 | * | |
708 | * This function will change caching policy of any default kernel mappings of | |
709 | * the pages backing @ttm. If changing from cached to uncached or | |
710 | * write-combined, | |
711 | * all CPU caches will first be flushed to make sure the data of the pages | |
712 | * hit RAM. This function may be very costly as it involves global TLB | |
713 | * and cache flushes and potential page splitting / combining. | |
714 | */ | |
715 | extern int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement); | |
716 | extern int ttm_tt_swapout(struct ttm_tt *ttm, | |
717 | struct file *persistant_swap_storage); | |
718 | ||
719 | /* | |
720 | * ttm_bo.c | |
721 | */ | |
722 | ||
723 | /** | |
724 | * ttm_mem_reg_is_pci | |
725 | * | |
726 | * @bdev: Pointer to a struct ttm_bo_device. | |
727 | * @mem: A valid struct ttm_mem_reg. | |
728 | * | |
729 | * Returns true if the memory described by @mem is PCI memory, | |
730 | * false otherwise. | |
731 | */ | |
732 | extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, | |
733 | struct ttm_mem_reg *mem); | |
734 | ||
735 | /** | |
736 | * ttm_bo_mem_space | |
737 | * | |
738 | * @bo: Pointer to a struct ttm_buffer_object. the data of which | |
739 | * we want to allocate space for. | |
740 | * @proposed_placement: Proposed new placement for the buffer object. | |
741 | * @mem: A struct ttm_mem_reg. | |
742 | * @interruptible: Sleep interruptible when sliping. | |
9d87fa21 JG |
743 | * @no_wait_reserve: Return immediately if other buffers are busy. |
744 | * @no_wait_gpu: Return immediately if the GPU is busy. | |
ba4e7d97 TH |
745 | * |
746 | * Allocate memory space for the buffer object pointed to by @bo, using | |
747 | * the placement flags in @mem, potentially evicting other idle buffer objects. | |
748 | * This function may sleep while waiting for space to become available. | |
749 | * Returns: | |
750 | * -EBUSY: No space available (only if no_wait == 1). | |
751 | * -ENOMEM: Could not allocate memory for the buffer object, either due to | |
752 | * fragmentation or concurrent allocators. | |
98ffc415 | 753 | * -ERESTARTSYS: An interruptible sleep was interrupted by a signal. |
ba4e7d97 TH |
754 | */ |
755 | extern int ttm_bo_mem_space(struct ttm_buffer_object *bo, | |
ca262a99 JG |
756 | struct ttm_placement *placement, |
757 | struct ttm_mem_reg *mem, | |
9d87fa21 JG |
758 | bool interruptible, |
759 | bool no_wait_reserve, bool no_wait_gpu); | |
42311ff9 BS |
760 | |
761 | extern void ttm_bo_mem_put(struct ttm_buffer_object *bo, | |
762 | struct ttm_mem_reg *mem); | |
c9220b0f DA |
763 | extern void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo, |
764 | struct ttm_mem_reg *mem); | |
42311ff9 | 765 | |
ba4e7d97 TH |
766 | /** |
767 | * ttm_bo_wait_for_cpu | |
768 | * | |
769 | * @bo: Pointer to a struct ttm_buffer_object. | |
770 | * @no_wait: Don't sleep while waiting. | |
771 | * | |
772 | * Wait until a buffer object is no longer sync'ed for CPU access. | |
773 | * Returns: | |
774 | * -EBUSY: Buffer object was sync'ed for CPU access. (only if no_wait == 1). | |
98ffc415 | 775 | * -ERESTARTSYS: An interruptible sleep was interrupted by a signal. |
ba4e7d97 TH |
776 | */ |
777 | ||
778 | extern int ttm_bo_wait_cpu(struct ttm_buffer_object *bo, bool no_wait); | |
779 | ||
ba4420c2 DA |
780 | extern void ttm_bo_global_release(struct drm_global_reference *ref); |
781 | extern int ttm_bo_global_init(struct drm_global_reference *ref); | |
a987fcaa | 782 | |
ba4e7d97 TH |
783 | extern int ttm_bo_device_release(struct ttm_bo_device *bdev); |
784 | ||
785 | /** | |
786 | * ttm_bo_device_init | |
787 | * | |
788 | * @bdev: A pointer to a struct ttm_bo_device to initialize. | |
789 | * @mem_global: A pointer to an initialized struct ttm_mem_global. | |
790 | * @driver: A pointer to a struct ttm_bo_driver set up by the caller. | |
791 | * @file_page_offset: Offset into the device address space that is available | |
792 | * for buffer data. This ensures compatibility with other users of the | |
793 | * address space. | |
794 | * | |
795 | * Initializes a struct ttm_bo_device: | |
796 | * Returns: | |
797 | * !0: Failure. | |
798 | */ | |
799 | extern int ttm_bo_device_init(struct ttm_bo_device *bdev, | |
a987fcaa | 800 | struct ttm_bo_global *glob, |
ba4e7d97 | 801 | struct ttm_bo_driver *driver, |
ad49f501 | 802 | uint64_t file_page_offset, bool need_dma32); |
ba4e7d97 | 803 | |
e024e110 DA |
804 | /** |
805 | * ttm_bo_unmap_virtual | |
806 | * | |
807 | * @bo: tear down the virtual mappings for this BO | |
808 | */ | |
809 | extern void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo); | |
ba4e7d97 | 810 | |
eba67093 TH |
811 | /** |
812 | * ttm_bo_unmap_virtual | |
813 | * | |
814 | * @bo: tear down the virtual mappings for this BO | |
815 | * | |
816 | * The caller must take ttm_mem_io_lock before calling this function. | |
817 | */ | |
818 | extern void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo); | |
819 | ||
820 | extern int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo); | |
821 | extern void ttm_mem_io_free_vm(struct ttm_buffer_object *bo); | |
822 | extern int ttm_mem_io_lock(struct ttm_mem_type_manager *man, | |
823 | bool interruptible); | |
824 | extern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man); | |
825 | ||
826 | ||
ba4e7d97 TH |
827 | /** |
828 | * ttm_bo_reserve: | |
829 | * | |
830 | * @bo: A pointer to a struct ttm_buffer_object. | |
831 | * @interruptible: Sleep interruptible if waiting. | |
832 | * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY. | |
833 | * @use_sequence: If @bo is already reserved, Only sleep waiting for | |
834 | * it to become unreserved if @sequence < (@bo)->sequence. | |
835 | * | |
836 | * Locks a buffer object for validation. (Or prevents other processes from | |
837 | * locking it for validation) and removes it from lru lists, while taking | |
838 | * a number of measures to prevent deadlocks. | |
839 | * | |
840 | * Deadlocks may occur when two processes try to reserve multiple buffers in | |
841 | * different order, either by will or as a result of a buffer being evicted | |
842 | * to make room for a buffer already reserved. (Buffers are reserved before | |
843 | * they are evicted). The following algorithm prevents such deadlocks from | |
25985edc | 844 | * occurring: |
ba4e7d97 TH |
845 | * 1) Buffers are reserved with the lru spinlock held. Upon successful |
846 | * reservation they are removed from the lru list. This stops a reserved buffer | |
847 | * from being evicted. However the lru spinlock is released between the time | |
848 | * a buffer is selected for eviction and the time it is reserved. | |
849 | * Therefore a check is made when a buffer is reserved for eviction, that it | |
850 | * is still the first buffer in the lru list, before it is removed from the | |
851 | * list. @check_lru == 1 forces this check. If it fails, the function returns | |
852 | * -EINVAL, and the caller should then choose a new buffer to evict and repeat | |
853 | * the procedure. | |
854 | * 2) Processes attempting to reserve multiple buffers other than for eviction, | |
855 | * (typically execbuf), should first obtain a unique 32-bit | |
856 | * validation sequence number, | |
857 | * and call this function with @use_sequence == 1 and @sequence == the unique | |
858 | * sequence number. If upon call of this function, the buffer object is already | |
859 | * reserved, the validation sequence is checked against the validation | |
860 | * sequence of the process currently reserving the buffer, | |
861 | * and if the current validation sequence is greater than that of the process | |
862 | * holding the reservation, the function returns -EAGAIN. Otherwise it sleeps | |
863 | * waiting for the buffer to become unreserved, after which it retries | |
864 | * reserving. | |
865 | * The caller should, when receiving an -EAGAIN error | |
866 | * release all its buffer reservations, wait for @bo to become unreserved, and | |
867 | * then rerun the validation with the same validation sequence. This procedure | |
868 | * will always guarantee that the process with the lowest validation sequence | |
869 | * will eventually succeed, preventing both deadlocks and starvation. | |
870 | * | |
871 | * Returns: | |
872 | * -EAGAIN: The reservation may cause a deadlock. | |
873 | * Release all buffer reservations, wait for @bo to become unreserved and | |
874 | * try again. (only if use_sequence == 1). | |
98ffc415 | 875 | * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by |
ba4e7d97 | 876 | * a signal. Release all buffer reservations and return to user-space. |
96726fe5 TH |
877 | * -EBUSY: The function needed to sleep, but @no_wait was true |
878 | * -EDEADLK: Bo already reserved using @sequence. This error code will only | |
879 | * be returned if @use_sequence is set to true. | |
ba4e7d97 TH |
880 | */ |
881 | extern int ttm_bo_reserve(struct ttm_buffer_object *bo, | |
882 | bool interruptible, | |
883 | bool no_wait, bool use_sequence, uint32_t sequence); | |
884 | ||
d6ea8886 DA |
885 | |
886 | /** | |
887 | * ttm_bo_reserve_locked: | |
888 | * | |
96726fe5 TH |
889 | * @bo: A pointer to a struct ttm_buffer_object. |
890 | * @interruptible: Sleep interruptible if waiting. | |
891 | * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY. | |
892 | * @use_sequence: If @bo is already reserved, Only sleep waiting for | |
893 | * it to become unreserved if @sequence < (@bo)->sequence. | |
894 | * | |
895 | * Must be called with struct ttm_bo_global::lru_lock held, | |
896 | * and will not remove reserved buffers from the lru lists. | |
d6ea8886 | 897 | * The function may release the LRU spinlock if it needs to sleep. |
96726fe5 TH |
898 | * Otherwise identical to ttm_bo_reserve. |
899 | * | |
900 | * Returns: | |
901 | * -EAGAIN: The reservation may cause a deadlock. | |
902 | * Release all buffer reservations, wait for @bo to become unreserved and | |
903 | * try again. (only if use_sequence == 1). | |
904 | * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by | |
905 | * a signal. Release all buffer reservations and return to user-space. | |
906 | * -EBUSY: The function needed to sleep, but @no_wait was true | |
907 | * -EDEADLK: Bo already reserved using @sequence. This error code will only | |
908 | * be returned if @use_sequence is set to true. | |
d6ea8886 | 909 | */ |
d6ea8886 DA |
910 | extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, |
911 | bool interruptible, | |
912 | bool no_wait, bool use_sequence, | |
913 | uint32_t sequence); | |
914 | ||
ba4e7d97 TH |
915 | /** |
916 | * ttm_bo_unreserve | |
917 | * | |
918 | * @bo: A pointer to a struct ttm_buffer_object. | |
919 | * | |
920 | * Unreserve a previous reservation of @bo. | |
921 | */ | |
922 | extern void ttm_bo_unreserve(struct ttm_buffer_object *bo); | |
923 | ||
95762c2b TH |
924 | /** |
925 | * ttm_bo_unreserve_locked | |
926 | * | |
927 | * @bo: A pointer to a struct ttm_buffer_object. | |
928 | * | |
929 | * Unreserve a previous reservation of @bo. | |
930 | * Needs to be called with struct ttm_bo_global::lru_lock held. | |
931 | */ | |
932 | extern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo); | |
933 | ||
ba4e7d97 TH |
934 | /** |
935 | * ttm_bo_wait_unreserved | |
936 | * | |
937 | * @bo: A pointer to a struct ttm_buffer_object. | |
938 | * | |
939 | * Wait for a struct ttm_buffer_object to become unreserved. | |
940 | * This is typically used in the execbuf code to relax cpu-usage when | |
941 | * a potential deadlock condition backoff. | |
942 | */ | |
943 | extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo, | |
944 | bool interruptible); | |
945 | ||
ba4e7d97 TH |
946 | /* |
947 | * ttm_bo_util.c | |
948 | */ | |
949 | ||
950 | /** | |
951 | * ttm_bo_move_ttm | |
952 | * | |
953 | * @bo: A pointer to a struct ttm_buffer_object. | |
954 | * @evict: 1: This is an eviction. Don't try to pipeline. | |
9d87fa21 JG |
955 | * @no_wait_reserve: Return immediately if other buffers are busy. |
956 | * @no_wait_gpu: Return immediately if the GPU is busy. | |
ba4e7d97 TH |
957 | * @new_mem: struct ttm_mem_reg indicating where to move. |
958 | * | |
959 | * Optimized move function for a buffer object with both old and | |
960 | * new placement backed by a TTM. The function will, if successful, | |
961 | * free any old aperture space, and set (@new_mem)->mm_node to NULL, | |
962 | * and update the (@bo)->mem placement flags. If unsuccessful, the old | |
963 | * data remains untouched, and it's up to the caller to free the | |
964 | * memory space indicated by @new_mem. | |
965 | * Returns: | |
966 | * !0: Failure. | |
967 | */ | |
968 | ||
969 | extern int ttm_bo_move_ttm(struct ttm_buffer_object *bo, | |
9d87fa21 JG |
970 | bool evict, bool no_wait_reserve, |
971 | bool no_wait_gpu, struct ttm_mem_reg *new_mem); | |
ba4e7d97 TH |
972 | |
973 | /** | |
974 | * ttm_bo_move_memcpy | |
975 | * | |
976 | * @bo: A pointer to a struct ttm_buffer_object. | |
977 | * @evict: 1: This is an eviction. Don't try to pipeline. | |
9d87fa21 JG |
978 | * @no_wait_reserve: Return immediately if other buffers are busy. |
979 | * @no_wait_gpu: Return immediately if the GPU is busy. | |
ba4e7d97 TH |
980 | * @new_mem: struct ttm_mem_reg indicating where to move. |
981 | * | |
982 | * Fallback move function for a mappable buffer object in mappable memory. | |
983 | * The function will, if successful, | |
984 | * free any old aperture space, and set (@new_mem)->mm_node to NULL, | |
985 | * and update the (@bo)->mem placement flags. If unsuccessful, the old | |
986 | * data remains untouched, and it's up to the caller to free the | |
987 | * memory space indicated by @new_mem. | |
988 | * Returns: | |
989 | * !0: Failure. | |
990 | */ | |
991 | ||
992 | extern int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, | |
9d87fa21 JG |
993 | bool evict, bool no_wait_reserve, |
994 | bool no_wait_gpu, struct ttm_mem_reg *new_mem); | |
ba4e7d97 TH |
995 | |
996 | /** | |
997 | * ttm_bo_free_old_node | |
998 | * | |
999 | * @bo: A pointer to a struct ttm_buffer_object. | |
1000 | * | |
1001 | * Utility function to free an old placement after a successful move. | |
1002 | */ | |
1003 | extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo); | |
1004 | ||
1005 | /** | |
1006 | * ttm_bo_move_accel_cleanup. | |
1007 | * | |
1008 | * @bo: A pointer to a struct ttm_buffer_object. | |
1009 | * @sync_obj: A sync object that signals when moving is complete. | |
1010 | * @sync_obj_arg: An argument to pass to the sync object idle / wait | |
1011 | * functions. | |
1012 | * @evict: This is an evict move. Don't return until the buffer is idle. | |
9d87fa21 JG |
1013 | * @no_wait_reserve: Return immediately if other buffers are busy. |
1014 | * @no_wait_gpu: Return immediately if the GPU is busy. | |
ba4e7d97 TH |
1015 | * @new_mem: struct ttm_mem_reg indicating where to move. |
1016 | * | |
1017 | * Accelerated move function to be called when an accelerated move | |
1018 | * has been scheduled. The function will create a new temporary buffer object | |
1019 | * representing the old placement, and put the sync object on both buffer | |
1020 | * objects. After that the newly created buffer object is unref'd to be | |
1021 | * destroyed when the move is complete. This will help pipeline | |
1022 | * buffer moves. | |
1023 | */ | |
1024 | ||
1025 | extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, | |
1026 | void *sync_obj, | |
1027 | void *sync_obj_arg, | |
9d87fa21 JG |
1028 | bool evict, bool no_wait_reserve, |
1029 | bool no_wait_gpu, | |
ba4e7d97 TH |
1030 | struct ttm_mem_reg *new_mem); |
1031 | /** | |
1032 | * ttm_io_prot | |
1033 | * | |
1034 | * @c_state: Caching state. | |
1035 | * @tmp: Page protection flag for a normal, cached mapping. | |
1036 | * | |
1037 | * Utility function that returns the pgprot_t that should be used for | |
1038 | * setting up a PTE with the caching model indicated by @c_state. | |
1039 | */ | |
a55e8d45 | 1040 | extern pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp); |
ba4e7d97 | 1041 | |
d961db75 BS |
1042 | extern const struct ttm_mem_type_manager_func ttm_bo_manager_func; |
1043 | ||
ba4e7d97 TH |
1044 | #if (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE))) |
1045 | #define TTM_HAS_AGP | |
1046 | #include <linux/agp_backend.h> | |
1047 | ||
1048 | /** | |
1049 | * ttm_agp_backend_init | |
1050 | * | |
1051 | * @bdev: Pointer to a struct ttm_bo_device. | |
1052 | * @bridge: The agp bridge this device is sitting on. | |
1053 | * | |
1054 | * Create a TTM backend that uses the indicated AGP bridge as an aperture | |
1055 | * for TT memory. This function uses the linux agpgart interface to | |
1056 | * bind and unbind memory backing a ttm_tt. | |
1057 | */ | |
1058 | extern struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev, | |
1059 | struct agp_bridge_data *bridge); | |
1060 | #endif | |
1061 | ||
1062 | #endif |