package/kernel/mac80211/patches/ath/977-ath10k-add-support-for-configuring-management-packet.patch

   1 From: Sriram R <srirrama@codeaurora.org>
   2 Date: Mon, 10 Sep 2018 11:09:40 +0530
   3 Subject: [PATCH] ath10k: add support for configuring management packet rate
   4
   5 By default the firmware uses 1Mbps and 6Mbps rate for management packets
   6 in 2G and 5G bands respectively. But when the user selects different
   7 basic rates from the userspace, we need to send the management
   8 packets at the lowest basic rate selected by the user.
   9
  10 This change makes use of WMI_VDEV_PARAM_MGMT_RATE param for configuring the
  11 management packets rate to the firmware.
  12
  13 Chipsets Tested : QCA988X, QCA9887, QCA9984
  14 FW Tested       : 10.2.4-1.0-41, 10.4-3.6.104
  15
  16 Signed-off-by: Sriram R <srirrama@codeaurora.org>
  17 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  18
  19 Origin: backport, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f279294e9ee22a8f306fdc8e4181cf555e6f0f70
  20 ---
  21 --- a/drivers/net/wireless/ath/ath10k/mac.c
  22 +++ b/drivers/net/wireless/ath/ath10k/mac.c
  23 @@ -158,6 +158,22 @@ u8 ath10k_mac_bitrate_to_idx(const struc
  24         return 0;
  25  }
  26
  27 +static int ath10k_mac_get_rate_hw_value(int bitrate)
  28 +{
  29 +       int i;
  30 +       u8 hw_value_prefix = 0;
  31 +
  32 +       if (ath10k_mac_bitrate_is_cck(bitrate))
  33 +               hw_value_prefix = WMI_RATE_PREAMBLE_CCK << 6;
  34 +
  35 +       for (i = 0; i < sizeof(ath10k_rates); i++) {
  36 +               if (ath10k_rates[i].bitrate == bitrate)
  37 +                       return hw_value_prefix | ath10k_rates[i].hw_value;
  38 +       }
  39 +
  40 +       return -EINVAL;
  41 +}
  42 +
  43  static int ath10k_mac_get_max_vht_mcs_map(u16 mcs_map, int nss)
  44  {
  45         switch ((mcs_map >> (2 * nss)) & 0x3) {
  46 @@ -5468,9 +5484,10 @@ static void ath10k_bss_info_changed(stru
  47         struct cfg80211_chan_def def;
  48         u32 vdev_param, pdev_param, slottime, preamble;
  49         u16 bitrate, hw_value;
  50 -       u8 rate;
  51 -       int rateidx, ret = 0;
  52 +       u8 rate, basic_rate_idx;
  53 +       int rateidx, ret = 0, hw_rate_code;
  54         enum nl80211_band band;
  55 +       const struct ieee80211_supported_band *sband;
  56
  57         mutex_lock(&ar->conf_mutex);
  58
  59 @@ -5676,6 +5693,30 @@ static void ath10k_bss_info_changed(stru
  60                                     arvif->vdev_id,  ret);
  61         }
  62
  63 +       if (changed & BSS_CHANGED_BASIC_RATES) {
  64 +               if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) {
  65 +                       mutex_unlock(&ar->conf_mutex);
  66 +                       return;
  67 +               }
  68 +
  69 +       sband = ar->hw->wiphy->bands[def.chan->band];
  70 +       basic_rate_idx = ffs(vif->bss_conf.basic_rates) - 1;
  71 +       bitrate = sband->bitrates[basic_rate_idx].bitrate;
  72 +
  73 +       hw_rate_code = ath10k_mac_get_rate_hw_value(bitrate);
  74 +       if (hw_rate_code < 0) {
  75 +               ath10k_warn(ar, "bitrate not supported %d\n", bitrate);
  76 +               mutex_unlock(&ar->conf_mutex);
  77 +               return;
  78 +       }
  79 +
  80 +       vdev_param = ar->wmi.vdev_param->mgmt_rate;
  81 +       ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
  82 +                                       hw_rate_code);
  83 +       if (ret)
  84 +               ath10k_warn(ar, "failed to set mgmt tx rate %d\n", ret);
  85 +       }
  86 +
  87         mutex_unlock(&ar->conf_mutex);
  88  }
  89