123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
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/*
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* Copyright (c) 2012 Neratec Solutions AG
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef DFS_PATTERN_DETECTOR_H
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#define DFS_PATTERN_DETECTOR_H
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/nl80211.h>
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/* tolerated deviation of radar time stamp in usecs on both sides
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* TODO: this might need to be HW-dependent
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*/
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#define PRI_TOLERANCE 16
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/**
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* struct ath_dfs_pool_stats - DFS Statistics for global pools
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*/
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struct ath_dfs_pool_stats {
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u32 pool_reference;
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u32 pulse_allocated;
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u32 pulse_alloc_error;
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u32 pulse_used;
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u32 pseq_allocated;
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u32 pseq_alloc_error;
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u32 pseq_used;
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};
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/**
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* struct pulse_event - describing pulses reported by PHY
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* @ts: pulse time stamp in us
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* @freq: channel frequency in MHz
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* @width: pulse duration in us
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* @rssi: rssi of radar event
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* @chirp: chirp detected in pulse
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*/
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struct pulse_event {
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u64 ts;
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u16 freq;
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u8 width;
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u8 rssi;
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bool chirp;
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};
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/**
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* struct radar_detector_specs - detector specs for a radar pattern type
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* @type_id: pattern type, as defined by regulatory
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* @width_min: minimum radar pulse width in [us]
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* @width_max: maximum radar pulse width in [us]
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* @pri_min: minimum pulse repetition interval in [us] (including tolerance)
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* @pri_max: minimum pri in [us] (including tolerance)
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* @num_pri: maximum number of different pri for this type
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* @ppb: pulses per bursts for this type
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* @ppb_thresh: number of pulses required to trigger detection
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* @max_pri_tolerance: pulse time stamp tolerance on both sides [us]
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* @chirp: chirp required for the radar pattern
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*/
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struct radar_detector_specs {
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u8 type_id;
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u8 width_min;
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u8 width_max;
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u16 pri_min;
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u16 pri_max;
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u8 num_pri;
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u8 ppb;
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u8 ppb_thresh;
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u8 max_pri_tolerance;
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bool chirp;
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};
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/**
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* struct dfs_pattern_detector - DFS pattern detector
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* @exit(): destructor
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* @set_dfs_domain(): set DFS domain, resets detector lines upon domain changes
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* @add_pulse(): add radar pulse to detector, returns true on detection
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* @region: active DFS region, NL80211_DFS_UNSET until set
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* @num_radar_types: number of different radar types
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* @last_pulse_ts: time stamp of last valid pulse in usecs
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* @radar_detector_specs: array of radar detection specs
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* @channel_detectors: list connecting channel_detector elements
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*/
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struct dfs_pattern_detector {
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void (*exit)(struct dfs_pattern_detector *dpd);
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bool (*set_dfs_domain)(struct dfs_pattern_detector *dpd,
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enum nl80211_dfs_regions region);
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bool (*add_pulse)(struct dfs_pattern_detector *dpd,
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struct pulse_event *pe,
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struct radar_detector_specs *rs);
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struct ath_dfs_pool_stats (*get_stats)(struct dfs_pattern_detector *dpd);
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enum nl80211_dfs_regions region;
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u8 num_radar_types;
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u64 last_pulse_ts;
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/* needed for ath_dbg() */
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struct ath_common *common;
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const struct radar_detector_specs *radar_spec;
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struct list_head channel_detectors;
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};
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/**
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* dfs_pattern_detector_init() - constructor for pattern detector class
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* @param region: DFS domain to be used, can be NL80211_DFS_UNSET at creation
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* @return instance pointer on success, NULL otherwise
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*/
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extern struct dfs_pattern_detector *
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dfs_pattern_detector_init(struct ath_common *common,
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enum nl80211_dfs_regions region);
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#endif /* DFS_PATTERN_DETECTOR_H */
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