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1 | /* |
2 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | * $Id: ib_fmr_pool.h 1349 2004-12-16 21:09:43Z roland $ | |
33 | */ | |
34 | ||
35 | #if !defined(IB_FMR_POOL_H) | |
36 | #define IB_FMR_POOL_H | |
37 | ||
38 | #include <ib_verbs.h> | |
39 | ||
40 | struct ib_fmr_pool; | |
41 | ||
42 | /** | |
43 | * struct ib_fmr_pool_param - Parameters for creating FMR pool | |
44 | * @max_pages_per_fmr:Maximum number of pages per map request. | |
45 | * @access:Access flags for FMRs in pool. | |
46 | * @pool_size:Number of FMRs to allocate for pool. | |
47 | * @dirty_watermark:Flush is triggered when @dirty_watermark dirty | |
48 | * FMRs are present. | |
49 | * @flush_function:Callback called when unmapped FMRs are flushed and | |
50 | * more FMRs are possibly available for mapping | |
51 | * @flush_arg:Context passed to user's flush function. | |
52 | * @cache:If set, FMRs may be reused after unmapping for identical map | |
53 | * requests. | |
54 | */ | |
55 | struct ib_fmr_pool_param { | |
56 | int max_pages_per_fmr; | |
57 | enum ib_access_flags access; | |
58 | int pool_size; | |
59 | int dirty_watermark; | |
60 | void (*flush_function)(struct ib_fmr_pool *pool, | |
61 | void * arg); | |
62 | void *flush_arg; | |
63 | unsigned cache:1; | |
64 | }; | |
65 | ||
66 | struct ib_pool_fmr { | |
67 | struct ib_fmr *fmr; | |
68 | struct ib_fmr_pool *pool; | |
69 | struct list_head list; | |
70 | struct hlist_node cache_node; | |
71 | int ref_count; | |
72 | int remap_count; | |
73 | u64 io_virtual_address; | |
74 | int page_list_len; | |
75 | u64 page_list[0]; | |
76 | }; | |
77 | ||
78 | struct ib_fmr_pool *ib_create_fmr_pool(struct ib_pd *pd, | |
79 | struct ib_fmr_pool_param *params); | |
80 | ||
81 | int ib_destroy_fmr_pool(struct ib_fmr_pool *pool); | |
82 | ||
83 | int ib_flush_fmr_pool(struct ib_fmr_pool *pool); | |
84 | ||
85 | struct ib_pool_fmr *ib_fmr_pool_map_phys(struct ib_fmr_pool *pool_handle, | |
86 | u64 *page_list, | |
87 | int list_len, | |
88 | u64 *io_virtual_address); | |
89 | ||
90 | int ib_fmr_pool_unmap(struct ib_pool_fmr *fmr); | |
91 | ||
92 | #endif /* IB_FMR_POOL_H */ |