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44091d29 JP |
1 | /* |
2 | * include/linux/parman.h - Manager for linear priority array areas | |
3 | * Copyright (c) 2017 Mellanox Technologies. All rights reserved. | |
4 | * Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com> | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions are met: | |
8 | * | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * 3. Neither the names of the copyright holders nor the names of its | |
15 | * contributors may be used to endorse or promote products derived from | |
16 | * this software without specific prior written permission. | |
17 | * | |
18 | * Alternatively, this software may be distributed under the terms of the | |
19 | * GNU General Public License ("GPL") version 2 as published by the Free | |
20 | * Software Foundation. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
32 | * POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | #ifndef _PARMAN_H | |
36 | #define _PARMAN_H | |
37 | ||
38 | #include <linux/list.h> | |
39 | ||
40 | enum parman_algo_type { | |
41 | PARMAN_ALGO_TYPE_LSORT, | |
42 | }; | |
43 | ||
44 | struct parman_item { | |
45 | struct list_head list; | |
46 | unsigned long index; | |
47 | }; | |
48 | ||
49 | struct parman_prio { | |
50 | struct list_head list; | |
51 | struct list_head item_list; | |
52 | unsigned long priority; | |
53 | }; | |
54 | ||
55 | struct parman_ops { | |
56 | unsigned long base_count; | |
57 | unsigned long resize_step; | |
58 | int (*resize)(void *priv, unsigned long new_count); | |
59 | void (*move)(void *priv, unsigned long from_index, | |
60 | unsigned long to_index, unsigned long count); | |
61 | enum parman_algo_type algo; | |
62 | }; | |
63 | ||
64 | struct parman; | |
65 | ||
66 | struct parman *parman_create(const struct parman_ops *ops, void *priv); | |
67 | void parman_destroy(struct parman *parman); | |
68 | void parman_prio_init(struct parman *parman, struct parman_prio *prio, | |
69 | unsigned long priority); | |
70 | void parman_prio_fini(struct parman_prio *prio); | |
71 | int parman_item_add(struct parman *parman, struct parman_prio *prio, | |
72 | struct parman_item *item); | |
73 | void parman_item_remove(struct parman *parman, struct parman_prio *prio, | |
74 | struct parman_item *item); | |
75 | ||
76 | #endif |