1 /**************************************************************************
2  *
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4  * All Rights Reserved.
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8  * "Software"), to deal in the Software without restriction, including
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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.
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27 /*
28  * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29  */
30 
31 #ifndef _TTM_PLACEMENT_H_
32 #define _TTM_PLACEMENT_H_
33 
34 #include <linux/types.h>
35 
36 /*
37  * Memory regions for data placement.
38  */
39 
40 #define TTM_PL_SYSTEM           0
41 #define TTM_PL_TT               1
42 #define TTM_PL_VRAM             2
43 #define TTM_PL_PRIV             3
44 
45 /*
46  * TTM_PL_FLAG_TOPDOWN requests to be placed from the
47  * top of the memory area, instead of the bottom.
48  */
49 
50 #define TTM_PL_FLAG_CONTIGUOUS  (1 << 0)
51 #define TTM_PL_FLAG_TOPDOWN     (1 << 1)
52 
53 /* For multihop handling */
54 #define TTM_PL_FLAG_TEMPORARY   (1 << 2)
55 
56 /**
57  * struct ttm_place
58  *
59  * @fpfn:	first valid page frame number to put the object
60  * @lpfn:	last valid page frame number to put the object
61  * @mem_type:	One of TTM_PL_* where the resource should be allocated from.
62  * @flags:	memory domain and caching flags for the object
63  *
64  * Structure indicating a possible place to put an object.
65  */
66 struct ttm_place {
67 	unsigned	fpfn;
68 	unsigned	lpfn;
69 	uint32_t	mem_type;
70 	uint32_t	flags;
71 };
72 
73 /**
74  * struct ttm_placement
75  *
76  * @num_placement:	number of preferred placements
77  * @placement:		preferred placements
78  * @num_busy_placement:	number of preferred placements when need to evict buffer
79  * @busy_placement:	preferred placements when need to evict buffer
80  *
81  * Structure indicating the placement you request for an object.
82  */
83 struct ttm_placement {
84 	unsigned		num_placement;
85 	const struct ttm_place	*placement;
86 	unsigned		num_busy_placement;
87 	const struct ttm_place	*busy_placement;
88 };
89 
90 #endif
91