git.openwrt.org Git - openwrt/staging/ldir.git/blob

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 7 Jun 2024 17:58:54 +0200
   3 Subject: [PATCH] wifi: cfg80211: add helper for checking if a chandef is
   4  valid on a radio
   5
   6 Check if the full channel width is in the radio's frequency range.
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 ---
  10
  11 --- a/include/net/cfg80211.h
  12 +++ b/include/net/cfg80211.h
  13 @@ -6485,6 +6485,15 @@ static inline bool cfg80211_channel_is_p
  14  }
  15
  16  /**
  17 + * cfg80211_radio_chandef_valid - Check if the radio supports the chandef
  18 + *
  19 + * @radio: wiphy radio
  20 + * @chandef: chandef for current channel
  21 + */
  22 +bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
  23 +                                 const struct cfg80211_chan_def *chandef);
  24 +
  25 +/**
  26   * ieee80211_get_response_rate - get basic rate for a given rate
  27   *
  28   * @sband: the band to look for rates in
  29 --- a/net/wireless/util.c
  30 +++ b/net/wireless/util.c
  31 @@ -2884,3 +2884,38 @@ cfg80211_get_iftype_ext_capa(struct wiph
  32         return NULL;
  33  }
  34  EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa);
  35 +
  36 +static bool
  37 +ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio,
  38 +                                u32 freq, u32 width)
  39 +{
  40 +       const struct wiphy_radio_freq_range *r;
  41 +       int i;
  42 +
  43 +       for (i = 0; i < radio->n_freq_range; i++) {
  44 +               r = &radio->freq_range[i];
  45 +               if (freq - width / 2 >= r->start_freq &&
  46 +                   freq + width / 2 <= r->end_freq)
  47 +                       return true;
  48 +       }
  49 +
  50 +       return false;
  51 +}
  52 +
  53 +bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
  54 +                                 const struct cfg80211_chan_def *chandef)
  55 +{
  56 +       u32 freq, width;
  57 +
  58 +       freq = ieee80211_chandef_to_khz(chandef);
  59 +       width = nl80211_chan_width_to_mhz(chandef->width);
  60 +       if (!ieee80211_radio_freq_range_valid(radio, freq, width))
  61 +               return false;
  62 +
  63 +       freq = MHZ_TO_KHZ(chandef->center_freq2);
  64 +       if (freq && !ieee80211_radio_freq_range_valid(radio, freq, width))
  65 +               return false;
  66 +
  67 +       return true;
  68 +}
  69 +EXPORT_SYMBOL(cfg80211_radio_chandef_valid);