/*
* Copyright ( c ) 2012 Neratec Solutions AG
*
* Permission to use , copy , modify , and / or distribute this software for any
* purpose with or without fee is hereby granted , provided that the above
* copyright notice and this permission notice appear in all copies .
*
* THE SOFTWARE IS PROVIDED " AS IS " AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS . IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL , DIRECT , INDIRECT , OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE , DATA OR PROFITS , WHETHER IN AN
* ACTION OF CONTRACT , NEGLIGENCE OR OTHER TORTIOUS ACTION , ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE .
*/
#ifndef DFS_PRI_DETECTOR_H
#define DFS_PRI_DETECTOR_H
#include <linux/list.h>
extern struct ath_dfs_pool_stats global_dfs_pool_stats;
/**
* struct pri_sequence - sequence of pulses matching one PRI
* @ head : list_head
* @ pri : pulse repetition interval ( PRI ) in usecs
* @ dur : duration of sequence in usecs
* @ count : number of pulses in this sequence
* @ count_falses : number of not matching pulses in this sequence
* @ first_ts : time stamp of first pulse in usecs
* @ last_ts : time stamp of last pulse in usecs
* @ deadline_ts : deadline when this sequence becomes invalid ( first_ts + dur )
*/
struct pri_sequence {
struct list_head head;
u32 pri;
u32 dur;
u32 count;
u32 count_falses;
u64 first_ts;
u64 last_ts;
u64 deadline_ts;
};
/**
* struct pri_detector - PRI detector element for a dedicated radar type
* @ exit ( ) : destructor
* @ add_pulse ( ) : add pulse event , returns pri_sequence if pattern was detected
* @ reset ( ) : clear states and reset to given time stamp
* @ rs : detector specs for this detector element
* @ last_ts : last pulse time stamp considered for this element in usecs
* @ sequences : list_head holding potential pulse sequences
* @ pulses : list connecting pulse_elem objects
* @ count : number of pulses in queue
* @ max_count : maximum number of pulses to be queued
* @ window_size : window size back from newest pulse time stamp in usecs
*/
struct pri_detector {
void (*exit ) (struct pri_detector *de);
struct pri_sequence *
(*add_pulse)(struct pri_detector *de, struct pulse_event *e);
void (*reset) (struct pri_detector *de, u64 ts);
const struct radar_detector_specs *rs;
/* private: internal use only */
u64 last_ts;
struct list_head sequences;
struct list_head pulses;
u32 count;
u32 max_count;
u32 window_size;
};
struct pri_detector *pri_detector_init(const struct radar_detector_specs *rs);
#endif /* DFS_PRI_DETECTOR_H */
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