cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dfs_pattern_detector.h (3943B)

      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/* tolerated deviation of radar time stamp in usecs on both sides
     25 * TODO: this might need to be HW-dependent
     26 */
     27#define PRI_TOLERANCE	16
     28
     29/**
     30 * struct ath_dfs_pool_stats - DFS Statistics for global pools
     31 */
     32struct ath_dfs_pool_stats {
     33	u32 pool_reference;
     34	u32 pulse_allocated;
     35	u32 pulse_alloc_error;
     36	u32 pulse_used;
     37	u32 pseq_allocated;
     38	u32 pseq_alloc_error;
     39	u32 pseq_used;
     40};
     41
     42/**
     43 * struct pulse_event - describing pulses reported by PHY
     44 * @ts: pulse time stamp in us
     45 * @freq: channel frequency in MHz
     46 * @width: pulse duration in us
     47 * @rssi: rssi of radar event
     48 * @chirp: chirp detected in pulse
     49 */
     50struct pulse_event {
     51	u64 ts;
     52	u16 freq;
     53	u8 width;
     54	u8 rssi;
     55	bool chirp;
     56};
     57
     58/**
     59 * struct radar_detector_specs - detector specs for a radar pattern type
     60 * @type_id: pattern type, as defined by regulatory
     61 * @width_min: minimum radar pulse width in [us]
     62 * @width_max: maximum radar pulse width in [us]
     63 * @pri_min: minimum pulse repetition interval in [us] (including tolerance)
     64 * @pri_max: minimum pri in [us] (including tolerance)
     65 * @num_pri: maximum number of different pri for this type
     66 * @ppb: pulses per bursts for this type
     67 * @ppb_thresh: number of pulses required to trigger detection
     68 * @max_pri_tolerance: pulse time stamp tolerance on both sides [us]
     69 * @chirp: chirp required for the radar pattern
     70 */
     71struct radar_detector_specs {
     72	u8 type_id;
     73	u8 width_min;
     74	u8 width_max;
     75	u16 pri_min;
     76	u16 pri_max;
     77	u8 num_pri;
     78	u8 ppb;
     79	u8 ppb_thresh;
     80	u8 max_pri_tolerance;
     81	bool chirp;
     82};
     83
     84/**
     85 * struct dfs_pattern_detector - DFS pattern detector
     86 * @exit(): destructor
     87 * @set_dfs_domain(): set DFS domain, resets detector lines upon domain changes
     88 * @add_pulse(): add radar pulse to detector, returns true on detection
     89 * @region: active DFS region, NL80211_DFS_UNSET until set
     90 * @num_radar_types: number of different radar types
     91 * @last_pulse_ts: time stamp of last valid pulse in usecs
     92 * @radar_detector_specs: array of radar detection specs
     93 * @channel_detectors: list connecting channel_detector elements
     94 */
     95struct dfs_pattern_detector {
     96	void (*exit)(struct dfs_pattern_detector *dpd);
     97	bool (*set_dfs_domain)(struct dfs_pattern_detector *dpd,
     98			   enum nl80211_dfs_regions region);
     99	bool (*add_pulse)(struct dfs_pattern_detector *dpd,
    100			  struct pulse_event *pe,
    101			  struct radar_detector_specs *rs);
    102
    103	struct ath_dfs_pool_stats (*get_stats)(struct dfs_pattern_detector *dpd);
    104	enum nl80211_dfs_regions region;
    105	u8 num_radar_types;
    106	u64 last_pulse_ts;
    107	/* needed for ath_dbg() */
    108	struct ath_common *common;
    109
    110	const struct radar_detector_specs *radar_spec;
    111	struct list_head channel_detectors;
    112};
    113
    114/**
    115 * dfs_pattern_detector_init() - constructor for pattern detector class
    116 * @param region: DFS domain to be used, can be NL80211_DFS_UNSET at creation
    117 * @return instance pointer on success, NULL otherwise
    118 */
    119extern struct dfs_pattern_detector *
    120dfs_pattern_detector_init(struct ath_common *common,
    121			  enum nl80211_dfs_regions region);
    122#endif /* DFS_PATTERN_DETECTOR_H */