drivers/net/wireless/ath/dfs_pattern_detector.h

   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  */
  27 struct 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  */
  44 struct 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  */
  63 struct 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  */
  86 struct 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  */
 109 extern struct dfs_pattern_detector *
 110 dfs_pattern_detector_init(struct ath_common *common,
 111                           enum nl80211_dfs_regions region);
 112 #endif /* DFS_PATTERN_DETECTOR_H */