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