1 | /* |
2 | * Copyright (c) 2012 Neratec Solutions AG |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for any |
5 | * purpose with or without fee is hereby granted, provided that the above |
6 | * copyright notice and this permission notice appear in all copies. |
7 | * |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
15 | */ |
16 | |
17 | #ifndef DFS_PRI_DETECTOR_H |
18 | #define DFS_PRI_DETECTOR_H |
19 | |
20 | #include <linux/list.h> |
21 | |
22 | extern struct ath_dfs_pool_stats global_dfs_pool_stats; |
23 | |
24 | /** |
25 | * struct pri_sequence - sequence of pulses matching one PRI |
26 | * @head: list_head |
27 | * @pri: pulse repetition interval (PRI) in usecs |
28 | * @dur: duration of sequence in usecs |
29 | * @count: number of pulses in this sequence |
30 | * @count_falses: number of not matching pulses in this sequence |
31 | * @first_ts: time stamp of first pulse in usecs |
32 | * @last_ts: time stamp of last pulse in usecs |
33 | * @deadline_ts: deadline when this sequence becomes invalid (first_ts + dur) |
34 | */ |
35 | struct pri_sequence { |
36 | struct list_head head; |
37 | u32 pri; |
38 | u32 dur; |
39 | u32 count; |
40 | u32 count_falses; |
41 | u64 first_ts; |
42 | u64 last_ts; |
43 | u64 deadline_ts; |
44 | }; |
45 | |
46 | /** |
47 | * struct pri_detector - PRI detector element for a dedicated radar type |
48 | * @exit(): destructor |
49 | * @add_pulse(): add pulse event, returns pri_sequence if pattern was detected |
50 | * @reset(): clear states and reset to given time stamp |
51 | * @rs: detector specs for this detector element |
52 | * @last_ts: last pulse time stamp considered for this element in usecs |
53 | * @sequences: list_head holding potential pulse sequences |
54 | * @pulses: list connecting pulse_elem objects |
55 | * @count: number of pulses in queue |
56 | * @max_count: maximum number of pulses to be queued |
57 | * @window_size: window size back from newest pulse time stamp in usecs |
58 | */ |
59 | struct pri_detector { |
60 | void (*exit) (struct pri_detector *de); |
61 | struct pri_sequence * |
62 | (*add_pulse)(struct pri_detector *de, struct pulse_event *e); |
63 | void (*reset) (struct pri_detector *de, u64 ts); |
64 | |
65 | const struct radar_detector_specs *rs; |
66 | |
67 | /* private: internal use only */ |
68 | u64 last_ts; |
69 | struct list_head sequences; |
70 | struct list_head pulses; |
71 | u32 count; |
72 | u32 max_count; |
73 | u32 window_size; |
74 | }; |
75 | |
76 | struct pri_detector *pri_detector_init(const struct radar_detector_specs *rs); |
77 | |
78 | #endif /* DFS_PRI_DETECTOR_H */ |
79 | |