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Diffstat (limited to 'include/drm/ttm/ttm_execbuf_util.h')
-rw-r--r-- | include/drm/ttm/ttm_execbuf_util.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h new file mode 100644 index 000000000000..cd2c475da9ea --- /dev/null +++ b/include/drm/ttm/ttm_execbuf_util.h | |||
@@ -0,0 +1,107 @@ | |||
1 | /************************************************************************** | ||
2 | * | ||
3 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | ||
4 | * All Rights Reserved. | ||
5 | * | ||
6 | * Permission is hereby granted, free of charge, to any person obtaining a | ||
7 | * copy of this software and associated documentation files (the | ||
8 | * "Software"), to deal in the Software without restriction, including | ||
9 | * without limitation the rights to use, copy, modify, merge, publish, | ||
10 | * distribute, sub license, and/or sell copies of the Software, and to | ||
11 | * permit persons to whom the Software is furnished to do so, subject to | ||
12 | * the following conditions: | ||
13 | * | ||
14 | * The above copyright notice and this permission notice (including the | ||
15 | * next paragraph) shall be included in all copies or substantial portions | ||
16 | * of the Software. | ||
17 | * | ||
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | ||
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | ||
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | ||
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | ||
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
25 | * | ||
26 | **************************************************************************/ | ||
27 | /* | ||
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | ||
29 | */ | ||
30 | |||
31 | #ifndef _TTM_EXECBUF_UTIL_H_ | ||
32 | #define _TTM_EXECBUF_UTIL_H_ | ||
33 | |||
34 | #include "ttm/ttm_bo_api.h" | ||
35 | #include <linux/list.h> | ||
36 | |||
37 | /** | ||
38 | * struct ttm_validate_buffer | ||
39 | * | ||
40 | * @head: list head for thread-private list. | ||
41 | * @bo: refcounted buffer object pointer. | ||
42 | * @new_sync_obj_arg: New sync_obj_arg for @bo, to be used once | ||
43 | * adding a new sync object. | ||
44 | * @reservied: Indicates whether @bo has been reserved for validation. | ||
45 | */ | ||
46 | |||
47 | struct ttm_validate_buffer { | ||
48 | struct list_head head; | ||
49 | struct ttm_buffer_object *bo; | ||
50 | void *new_sync_obj_arg; | ||
51 | bool reserved; | ||
52 | }; | ||
53 | |||
54 | /** | ||
55 | * function ttm_eu_backoff_reservation | ||
56 | * | ||
57 | * @list: thread private list of ttm_validate_buffer structs. | ||
58 | * | ||
59 | * Undoes all buffer validation reservations for bos pointed to by | ||
60 | * the list entries. | ||
61 | */ | ||
62 | |||
63 | extern void ttm_eu_backoff_reservation(struct list_head *list); | ||
64 | |||
65 | /** | ||
66 | * function ttm_eu_reserve_buffers | ||
67 | * | ||
68 | * @list: thread private list of ttm_validate_buffer structs. | ||
69 | * @val_seq: A unique sequence number. | ||
70 | * | ||
71 | * Tries to reserve bos pointed to by the list entries for validation. | ||
72 | * If the function returns 0, all buffers are marked as "unfenced", | ||
73 | * taken off the lru lists and are not synced for write CPU usage. | ||
74 | * | ||
75 | * If the function detects a deadlock due to multiple threads trying to | ||
76 | * reserve the same buffers in reverse order, all threads except one will | ||
77 | * back off and retry. This function may sleep while waiting for | ||
78 | * CPU write reservations to be cleared, and for other threads to | ||
79 | * unreserve their buffers. | ||
80 | * | ||
81 | * This function may return -ERESTART or -EAGAIN if the calling process | ||
82 | * receives a signal while waiting. In that case, no buffers on the list | ||
83 | * will be reserved upon return. | ||
84 | * | ||
85 | * Buffers reserved by this function should be unreserved by | ||
86 | * a call to either ttm_eu_backoff_reservation() or | ||
87 | * ttm_eu_fence_buffer_objects() when command submission is complete or | ||
88 | * has failed. | ||
89 | */ | ||
90 | |||
91 | extern int ttm_eu_reserve_buffers(struct list_head *list, uint32_t val_seq); | ||
92 | |||
93 | /** | ||
94 | * function ttm_eu_fence_buffer_objects. | ||
95 | * | ||
96 | * @list: thread private list of ttm_validate_buffer structs. | ||
97 | * @sync_obj: The new sync object for the buffers. | ||
98 | * | ||
99 | * This function should be called when command submission is complete, and | ||
100 | * it will add a new sync object to bos pointed to by entries on @list. | ||
101 | * It also unreserves all buffers, putting them on lru lists. | ||
102 | * | ||
103 | */ | ||
104 | |||
105 | extern void ttm_eu_fence_buffer_objects(struct list_head *list, void *sync_obj); | ||
106 | |||
107 | #endif | ||