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 */