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_PATTERN_DETECTOR_H 18#define DFS_PATTERN_DETECTOR_H 19 20#include <linux/types.h> 21#include <linux/list.h> 22#include <linux/nl80211.h> 23 24/** 25 * struct ath_dfs_pool_stats - DFS Statistics for global pools 26 */ 27struct ath_dfs_pool_stats { 28 u32 pool_reference; 29 u32 pulse_allocated; 30 u32 pulse_alloc_error; 31 u32 pulse_used; 32 u32 pseq_allocated; 33 u32 pseq_alloc_error; 34 u32 pseq_used; 35}; 36 37/** 38 * struct pulse_event - describing pulses reported by PHY 39 * @ts: pulse time stamp in us 40 * @freq: channel frequency in MHz 41 * @width: pulse duration in us 42 * @rssi: rssi of radar event 43 */ 44struct pulse_event { 45 u64 ts; 46 u16 freq; 47 u8 width; 48 u8 rssi; 49}; 50 51/** 52 * struct radar_detector_specs - detector specs for a radar pattern type 53 * @type_id: pattern type, as defined by regulatory 54 * @width_min: minimum radar pulse width in [us] 55 * @width_max: maximum radar pulse width in [us] 56 * @pri_min: minimum pulse repetition interval in [us] (including tolerance) 57 * @pri_max: minimum pri in [us] (including tolerance) 58 * @num_pri: maximum number of different pri for this type 59 * @ppb: pulses per bursts for this type 60 * @ppb_thresh: number of pulses required to trigger detection 61 * @max_pri_tolerance: pulse time stamp tolerance on both sides [us] 62 */ 63struct radar_detector_specs { 64 u8 type_id; 65 u8 width_min; 66 u8 width_max; 67 u16 pri_min; 68 u16 pri_max; 69 u8 num_pri; 70 u8 ppb; 71 u8 ppb_thresh; 72 u8 max_pri_tolerance; 73}; 74 75/** 76 * struct dfs_pattern_detector - DFS pattern detector 77 * @exit(): destructor 78 * @set_dfs_domain(): set DFS domain, resets detector lines upon domain changes 79 * @add_pulse(): add radar pulse to detector, returns true on detection 80 * @region: active DFS region, NL80211_DFS_UNSET until set 81 * @num_radar_types: number of different radar types 82 * @last_pulse_ts: time stamp of last valid pulse in usecs 83 * @radar_detector_specs: array of radar detection specs 84 * @channel_detectors: list connecting channel_detector elements 85 */ 86struct dfs_pattern_detector { 87 void (*exit)(struct dfs_pattern_detector *dpd); 88 bool (*set_dfs_domain)(struct dfs_pattern_detector *dpd, 89 enum nl80211_dfs_regions region); 90 bool (*add_pulse)(struct dfs_pattern_detector *dpd, 91 struct pulse_event *pe); 92 93 struct ath_dfs_pool_stats (*get_stats)(struct dfs_pattern_detector *dpd); 94 enum nl80211_dfs_regions region; 95 u8 num_radar_types; 96 u64 last_pulse_ts; 97 /* needed for ath_dbg() */ 98 struct ath_common *common; 99 100 const struct radar_detector_specs *radar_spec; 101 struct list_head channel_detectors; 102}; 103 104/** 105 * dfs_pattern_detector_init() - constructor for pattern detector class 106 * @param region: DFS domain to be used, can be NL80211_DFS_UNSET at creation 107 * @return instance pointer on success, NULL otherwise 108 */ 109extern struct dfs_pattern_detector * 110dfs_pattern_detector_init(struct ath_common *common, 111 enum nl80211_dfs_regions region); 112#endif /* DFS_PATTERN_DETECTOR_H */ 113