package/kernel/mac80211/patches/subsys/313-wifi-cfg80211-export-DFS-CAC-time-and-usable-state-h.patch

   1 From 30ca8b0c4d6c9fb1d76e5894b1e8bf7c6a12224d Mon Sep 17 00:00:00 2001
   2 From: Aditya Kumar Singh <quic_adisi@quicinc.com>
   3 Date: Tue, 12 Sep 2023 10:48:55 +0530
   4 Subject: [PATCH] wifi: cfg80211: export DFS CAC time and usable state helper
   5  functions
   6
   7 cfg80211 has cfg80211_chandef_dfs_usable() function to know whether
   8 at least one channel in the chandef is in usable state or not. Also,
   9 cfg80211_chandef_dfs_cac_time() function is there which tells the CAC
  10 time required for the given chandef.
  11
  12 Make these two functions visible to drivers by exporting their symbol
  13 to global list of kernel symbols.
  14
  15 Lower level drivers can make use of these two functions to be aware
  16 if CAC is required on the given chandef and for how long. For example
  17 drivers which maintains the CAC state internally can make use of these.
  18
  19 Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
  20 Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
  21 Link: https://lore.kernel.org/r/20230912051857.2284-2-quic_adisi@quicinc.com
  22 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  23 ---
  24  include/net/cfg80211.h | 24 ++++++++++++++++++++++++
  25  net/wireless/chan.c    |  2 ++
  26  net/wireless/core.h    | 17 -----------------
  27  3 files changed, 26 insertions(+), 17 deletions(-)
  28
  29 --- a/include/net/cfg80211.h
  30 +++ b/include/net/cfg80211.h
  31 @@ -1008,6 +1008,30 @@ int cfg80211_chandef_dfs_required(struct
  32                                   enum nl80211_iftype iftype);
  33
  34  /**
  35 + * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable and we
  36 + *                              can/need start CAC on such channel
  37 + * @wiphy: the wiphy to validate against
  38 + * @chandef: the channel definition to check
  39 + *
  40 + * Return: true if all channels available and at least
  41 + *        one channel requires CAC (NL80211_DFS_USABLE)
  42 + */
  43 +bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
  44 +                                const struct cfg80211_chan_def *chandef);
  45 +
  46 +/**
  47 + * cfg80211_chandef_dfs_cac_time - get the DFS CAC time (in ms) for given
  48 + *                                channel definition
  49 + * @wiphy: the wiphy to validate against
  50 + * @chandef: the channel definition to check
  51 + *
  52 + * Returns: DFS CAC time (in ms) which applies for this channel definition
  53 + */
  54 +unsigned int
  55 +cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
  56 +                             const struct cfg80211_chan_def *chandef);
  57 +
  58 +/**
  59   * nl80211_send_chandef - sends the channel definition.
  60   * @msg: the msg to send channel definition
  61   * @chandef: the channel definition to check
  62 --- a/net/wireless/chan.c
  63 +++ b/net/wireless/chan.c
  64 @@ -666,6 +666,7 @@ bool cfg80211_chandef_dfs_usable(struct
  65
  66         return (r1 + r2 > 0);
  67  }
  68 +EXPORT_SYMBOL(cfg80211_chandef_dfs_usable);
  69
  70  /*
  71   * Checks if center frequency of chan falls with in the bandwidth
  72 @@ -965,6 +966,7 @@ cfg80211_chandef_dfs_cac_time(struct wip
  73
  74         return max(t1, t2);
  75  }
  76 +EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time);
  77
  78  static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy,
  79                                         u32 center_freq, u32 bandwidth,
  80 --- a/net/wireless/core.h
  81 +++ b/net/wireless/core.h
  82 @@ -469,29 +469,12 @@ int cfg80211_scan(struct cfg80211_regist
  83
  84  extern struct work_struct cfg80211_disconnect_work;
  85
  86 -/**
  87 - * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
  88 - * @wiphy: the wiphy to validate against
  89 - * @chandef: the channel definition to check
  90 - *
  91 - * Checks if chandef is usable and we can/need start CAC on such channel.
  92 - *
  93 - * Return: true if all channels available and at least
  94 - *        one channel requires CAC (NL80211_DFS_USABLE)
  95 - */
  96 -bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
  97 -                                const struct cfg80211_chan_def *chandef);
  98 -
  99  void cfg80211_set_dfs_state(struct wiphy *wiphy,
 100                             const struct cfg80211_chan_def *chandef,
 101                             enum nl80211_dfs_state dfs_state);
 102
 103  void cfg80211_dfs_channels_update_work(struct work_struct *work);
 104
 105 -unsigned int
 106 -cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 107 -                             const struct cfg80211_chan_def *chandef);
 108 -
 109  void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
 110
 111  int