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