drivers/net/wireless/ath/ath9k/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 pulse_event - describing pulses reported by PHY
  26  * @ts: pulse time stamp in us
  27  * @freq: channel frequency in MHz
  28  * @width: pulse duration in us
  29  * @rssi: rssi of radar event
  30  */
  31 struct pulse_event {
  32         u64 ts;
  33         u16 freq;
  34         u8 width;
  35         u8 rssi;
  36 };
  37
  38 /**
  39  * struct radar_detector_specs - detector specs for a radar pattern type
  40  * @type_id: pattern type, as defined by regulatory
  41  * @width_min: minimum radar pulse width in [us]
  42  * @width_max: maximum radar pulse width in [us]
  43  * @pri_min: minimum pulse repetition interval in [us] (including tolerance)
  44  * @pri_max: minimum pri in [us] (including tolerance)
  45  * @num_pri: maximum number of different pri for this type
  46  * @ppb: pulses per bursts for this type
  47  * @ppb_thresh: number of pulses required to trigger detection
  48  * @max_pri_tolerance: pulse time stamp tolerance on both sides [us]
  49  */
  50 struct radar_detector_specs {
  51         u8 type_id;
  52         u8 width_min;
  53         u8 width_max;
  54         u16 pri_min;
  55         u16 pri_max;
  56         u8 num_pri;
  57         u8 ppb;
  58         u8 ppb_thresh;
  59         u8 max_pri_tolerance;
  60 };
  61
  62 /**
  63  * struct dfs_pattern_detector - DFS pattern detector
  64  * @exit(): destructor
  65  * @set_dfs_domain(): set DFS domain, resets detector lines upon domain changes
  66  * @add_pulse(): add radar pulse to detector, returns true on detection
  67  * @region: active DFS region, NL80211_DFS_UNSET until set
  68  * @num_radar_types: number of different radar types
  69  * @last_pulse_ts: time stamp of last valid pulse in usecs
  70  * @radar_detector_specs: array of radar detection specs
  71  * @channel_detectors: list connecting channel_detector elements
  72  */
  73 struct dfs_pattern_detector {
  74         void (*exit)(struct dfs_pattern_detector *dpd);
  75         bool (*set_dfs_domain)(struct dfs_pattern_detector *dpd,
  76                            enum nl80211_dfs_regions region);
  77         bool (*add_pulse)(struct dfs_pattern_detector *dpd,
  78                           struct pulse_event *pe);
  79
  80         enum nl80211_dfs_regions region;
  81         u8 num_radar_types;
  82         u64 last_pulse_ts;
  83
  84         const struct radar_detector_specs *radar_spec;
  85         struct list_head channel_detectors;
  86 };
  87
  88 /**
  89  * dfs_pattern_detector_init() - constructor for pattern detector class
  90  * @param region: DFS domain to be used, can be NL80211_DFS_UNSET at creation
  91  * @return instance pointer on success, NULL otherwise
  92  */
  93 #if defined(CONFIG_ATH9K_DFS_CERTIFIED)
  94 extern struct dfs_pattern_detector *
  95 dfs_pattern_detector_init(enum nl80211_dfs_regions region);
  96 #else
  97 static inline struct dfs_pattern_detector *
  98 dfs_pattern_detector_init(enum nl80211_dfs_regions region)
  99 {
 100         return NULL;
 101 }
 102 #endif /* CONFIG_ATH9K_DFS_CERTIFIED */
 103
 104 #endif /* DFS_PATTERN_DETECTOR_H */