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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_PLACEMENT_H_
32#define _TTM_PLACEMENT_H_
33
34#include <linux/types.h>
35
36/*
37 * Memory regions for data placement.
38 *
39 * Buffers placed in TTM_PL_SYSTEM are considered under TTMs control and can
40 * be swapped out whenever TTMs thinks it is a good idea.
41 * In cases where drivers would like to use TTM_PL_SYSTEM as a valid
42 * placement they need to be able to handle the issues that arise due to the
43 * above manually.
44 *
45 * For BO's which reside in system memory but for which the accelerator
46 * requires direct access (i.e. their usage needs to be synchronized
47 * between the CPU and accelerator via fences) a new, driver private
48 * placement that can handle such scenarios is a good idea.
49 */
50
51#define TTM_PL_SYSTEM 0
52#define TTM_PL_TT 1
53#define TTM_PL_VRAM 2
54#define TTM_PL_PRIV 3
55
56/*
57 * TTM_PL_FLAG_TOPDOWN requests to be placed from the
58 * top of the memory area, instead of the bottom.
59 */
60
61#define TTM_PL_FLAG_CONTIGUOUS (1 << 0)
62#define TTM_PL_FLAG_TOPDOWN (1 << 1)
63
64/* For multihop handling */
65#define TTM_PL_FLAG_TEMPORARY (1 << 2)
66
67/**
68 * struct ttm_place
69 *
70 * @fpfn: first valid page frame number to put the object
71 * @lpfn: last valid page frame number to put the object
72 * @mem_type: One of TTM_PL_* where the resource should be allocated from.
73 * @flags: memory domain and caching flags for the object
74 *
75 * Structure indicating a possible place to put an object.
76 */
77struct ttm_place {
78 unsigned fpfn;
79 unsigned lpfn;
80 uint32_t mem_type;
81 uint32_t flags;
82};
83
84/**
85 * struct ttm_placement
86 *
87 * @num_placement: number of preferred placements
88 * @placement: preferred placements
89 * @num_busy_placement: number of preferred placements when need to evict buffer
90 * @busy_placement: preferred placements when need to evict buffer
91 *
92 * Structure indicating the placement you request for an object.
93 */
94struct ttm_placement {
95 unsigned num_placement;
96 const struct ttm_place *placement;
97 unsigned num_busy_placement;
98 const struct ttm_place *busy_placement;
99};
100
101#endif
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_PLACEMENT_H_
32#define _TTM_PLACEMENT_H_
33
34#include <linux/types.h>
35
36/*
37 * Memory regions for data placement.
38 *
39 * Buffers placed in TTM_PL_SYSTEM are considered under TTMs control and can
40 * be swapped out whenever TTMs thinks it is a good idea.
41 * In cases where drivers would like to use TTM_PL_SYSTEM as a valid
42 * placement they need to be able to handle the issues that arise due to the
43 * above manually.
44 *
45 * For BO's which reside in system memory but for which the accelerator
46 * requires direct access (i.e. their usage needs to be synchronized
47 * between the CPU and accelerator via fences) a new, driver private
48 * placement that can handle such scenarios is a good idea.
49 */
50
51#define TTM_PL_SYSTEM 0
52#define TTM_PL_TT 1
53#define TTM_PL_VRAM 2
54#define TTM_PL_PRIV 3
55
56/*
57 * TTM_PL_FLAG_TOPDOWN requests to be placed from the
58 * top of the memory area, instead of the bottom.
59 */
60
61#define TTM_PL_FLAG_CONTIGUOUS (1 << 0)
62#define TTM_PL_FLAG_TOPDOWN (1 << 1)
63
64/* For multihop handling */
65#define TTM_PL_FLAG_TEMPORARY (1 << 2)
66
67/**
68 * struct ttm_place
69 *
70 * @fpfn: first valid page frame number to put the object
71 * @lpfn: last valid page frame number to put the object
72 * @mem_type: One of TTM_PL_* where the resource should be allocated from.
73 * @flags: memory domain and caching flags for the object
74 *
75 * Structure indicating a possible place to put an object.
76 */
77struct ttm_place {
78 unsigned fpfn;
79 unsigned lpfn;
80 uint32_t mem_type;
81 uint32_t flags;
82};
83
84/**
85 * struct ttm_placement
86 *
87 * @num_placement: number of preferred placements
88 * @placement: preferred placements
89 * @num_busy_placement: number of preferred placements when need to evict buffer
90 * @busy_placement: preferred placements when need to evict buffer
91 *
92 * Structure indicating the placement you request for an object.
93 */
94struct ttm_placement {
95 unsigned num_placement;
96 const struct ttm_place *placement;
97 unsigned num_busy_placement;
98 const struct ttm_place *busy_placement;
99};
100
101#endif