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 22extern 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 */ 35struct 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 */ 59struct 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 76struct pri_detector *pri_detector_init(const struct radar_detector_specs *rs); 77 78#endif /* DFS_PRI_DETECTOR_H */ 79