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27 /* 27 /*
28 * Authors: Thomas Hellstrom <thellstrom-at-vm 28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 */ 29 */
30 30
31 #ifndef _TTM_PLACEMENT_H_ 31 #ifndef _TTM_PLACEMENT_H_
32 #define _TTM_PLACEMENT_H_ 32 #define _TTM_PLACEMENT_H_
33 33
34 #include <linux/types.h> 34 #include <linux/types.h>
35 35
36 /* 36 /*
37 * Memory regions for data placement. 37 * Memory regions for data placement.
38 * 38 *
39 * Buffers placed in TTM_PL_SYSTEM are conside 39 * Buffers placed in TTM_PL_SYSTEM are considered under TTMs control and can
40 * be swapped out whenever TTMs thinks it is a 40 * be swapped out whenever TTMs thinks it is a good idea.
41 * In cases where drivers would like to use TT 41 * In cases where drivers would like to use TTM_PL_SYSTEM as a valid
42 * placement they need to be able to handle th 42 * placement they need to be able to handle the issues that arise due to the
43 * above manually. 43 * above manually.
44 * 44 *
45 * For BO's which reside in system memory but 45 * For BO's which reside in system memory but for which the accelerator
46 * requires direct access (i.e. their usage ne 46 * requires direct access (i.e. their usage needs to be synchronized
47 * between the CPU and accelerator via fences) 47 * between the CPU and accelerator via fences) a new, driver private
48 * placement that can handle such scenarios is 48 * placement that can handle such scenarios is a good idea.
49 */ 49 */
50 50
51 #define TTM_PL_SYSTEM 0 51 #define TTM_PL_SYSTEM 0
52 #define TTM_PL_TT 1 52 #define TTM_PL_TT 1
53 #define TTM_PL_VRAM 2 53 #define TTM_PL_VRAM 2
54 #define TTM_PL_PRIV 3 54 #define TTM_PL_PRIV 3
55 55
56 /* 56 /*
57 * TTM_PL_FLAG_TOPDOWN requests to be placed f 57 * TTM_PL_FLAG_TOPDOWN requests to be placed from the
58 * top of the memory area, instead of the bott 58 * top of the memory area, instead of the bottom.
59 */ 59 */
60 60
61 #define TTM_PL_FLAG_CONTIGUOUS (1 << 0) 61 #define TTM_PL_FLAG_CONTIGUOUS (1 << 0)
62 #define TTM_PL_FLAG_TOPDOWN (1 << 1) 62 #define TTM_PL_FLAG_TOPDOWN (1 << 1)
63 63
64 /* For multihop handling */ 64 /* For multihop handling */
65 #define TTM_PL_FLAG_TEMPORARY (1 << 2) 65 #define TTM_PL_FLAG_TEMPORARY (1 << 2)
66 66
67 /* Placement is never used during eviction */ 67 /* Placement is never used during eviction */
68 #define TTM_PL_FLAG_DESIRED (1 << 3) 68 #define TTM_PL_FLAG_DESIRED (1 << 3)
69 69
70 /* Placement is only used during eviction */ 70 /* Placement is only used during eviction */
71 #define TTM_PL_FLAG_FALLBACK (1 << 4) 71 #define TTM_PL_FLAG_FALLBACK (1 << 4)
72 72
73 /** 73 /**
74 * struct ttm_place 74 * struct ttm_place
75 * 75 *
76 * @fpfn: first valid page frame number 76 * @fpfn: first valid page frame number to put the object
77 * @lpfn: last valid page frame number t 77 * @lpfn: last valid page frame number to put the object
78 * @mem_type: One of TTM_PL_* where the reso 78 * @mem_type: One of TTM_PL_* where the resource should be allocated from.
79 * @flags: memory domain and caching flag 79 * @flags: memory domain and caching flags for the object
80 * 80 *
81 * Structure indicating a possible place to pu 81 * Structure indicating a possible place to put an object.
82 */ 82 */
83 struct ttm_place { 83 struct ttm_place {
84 unsigned fpfn; 84 unsigned fpfn;
85 unsigned lpfn; 85 unsigned lpfn;
86 uint32_t mem_type; 86 uint32_t mem_type;
87 uint32_t flags; 87 uint32_t flags;
88 }; 88 };
89 89
90 /** 90 /**
91 * struct ttm_placement 91 * struct ttm_placement
92 * 92 *
93 * @num_placement: number of preferred pl 93 * @num_placement: number of preferred placements
94 * @placement: preferred placements 94 * @placement: preferred placements
95 * 95 *
96 * Structure indicating the placement you requ 96 * Structure indicating the placement you request for an object.
97 */ 97 */
98 struct ttm_placement { 98 struct ttm_placement {
99 unsigned num_placement; 99 unsigned num_placement;
100 const struct ttm_place *placement; 100 const struct ttm_place *placement;
101 }; 101 };
102 102
103 #endif 103 #endif
104 104
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