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

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Thu, 6 Jun 2024 12:19:08 +0200
   3 Subject: [PATCH] wifi: mac80211: add support for DFS with multiple
   4  radios
   5
   6 DFS can be supported with multi-channel combinations, as long as each DFS
   7 capable radio only supports one channel.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/net/mac80211/main.c
  13 +++ b/net/mac80211/main.c
  14 @@ -1084,6 +1084,27 @@ static int ieee80211_init_cipher_suites(
  15         return 0;
  16  }
  17
  18 +static bool
  19 +ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb)
  20 +{
  21 +       int i, j;
  22 +
  23 +       for (i = 0; i < n_comb; i++, c++) {
  24 +               /* DFS is not supported with multi-channel combinations yet */
  25 +               if (c->radar_detect_widths &&
  26 +                   c->num_different_channels > 1)
  27 +                       return false;
  28 +
  29 +               /* mac80211 doesn't support more than one IBSS interface */
  30 +               for (j = 0; j < c->n_limits; j++)
  31 +                       if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
  32 +                           c->limits[j].max > 1)
  33 +                               return false;
  34 +       }
  35 +
  36 +       return true;
  37 +}
  38 +
  39  int ieee80211_register_hw(struct ieee80211_hw *hw)
  40  {
  41         struct ieee80211_local *local = hw_to_local(hw);
  42 @@ -1173,17 +1194,20 @@ int ieee80211_register_hw(struct ieee802
  43                         if (comb->num_different_channels > 1)
  44                                 return -EINVAL;
  45                 }
  46 -       } else {
  47 -               /* DFS is not supported with multi-channel combinations yet */
  48 -               for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
  49 -                       const struct ieee80211_iface_combination *comb;
  50 +       }
  51
  52 -                       comb = &local->hw.wiphy->iface_combinations[i];
  53 +       if (hw->wiphy->n_radio) {
  54 +               for (i = 0; i < hw->wiphy->n_radio; i++) {
  55 +                       const struct wiphy_radio *radio = &hw->wiphy->radio[i];
  56
  57 -                       if (comb->radar_detect_widths &&
  58 -                           comb->num_different_channels > 1)
  59 +                       if (!ieee80211_ifcomb_check(radio->iface_combinations,
  60 +                                                   radio->n_iface_combinations))
  61                                 return -EINVAL;
  62                 }
  63 +       } else {
  64 +               if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations,
  65 +                                           hw->wiphy->n_iface_combinations))
  66 +                       return -EINVAL;
  67         }
  68
  69         /* Only HW csum features are currently compatible with mac80211 */
  70 @@ -1313,18 +1337,6 @@ int ieee80211_register_hw(struct ieee802
  71         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
  72         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
  73
  74 -       /* mac80211 doesn't support more than one IBSS interface right now */
  75 -       for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
  76 -               const struct ieee80211_iface_combination *c;
  77 -               int j;
  78 -
  79 -               c = &hw->wiphy->iface_combinations[i];
  80 -
  81 -               for (j = 0; j < c->n_limits; j++)
  82 -                       if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
  83 -                           c->limits[j].max > 1)
  84 -                               return -EINVAL;
  85 -       }
  86
  87         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
  88                                       sizeof(void *) * channels, GFP_KERNEL);