iwlwifi: mvm: don't allow diversity if BT Coex / TT forbid it

We should not allow diversity when BT Coex needs the second
antenna. Thermal Throttling can also request to stop using
the second antenna. Honour those requests.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/utils.c b/drivers/net/wireless/iwlwifi/mvm/utils.c
index b269f1e30e87..42cea32ac546 100644
--- a/drivers/net/wireless/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/iwlwifi/mvm/utils.c
@@ -650,6 +650,39 @@ void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
         ieee80211_request_smps(vif, smps_mode);
 }
 
+static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
+                                   struct ieee80211_vif *vif)
+{
+        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+        bool *result = _data;
+        int i;
+
+        for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
+                if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
+                    mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
+                        *result = false;
+        }
+}
+
+bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
+{
+        bool result = true;
+
+        lockdep_assert_held(&mvm->mutex);
+
+        if (num_of_ant(mvm->fw->valid_rx_ant) == 1)
+                return false;
+
+        if (!mvm->cfg->rx_with_siso_diversity)
+                return false;
+
+        ieee80211_iterate_active_interfaces_atomic(
+                        mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
+                        iwl_mvm_diversity_iter, &result);
+
+        return result;
+}
+
 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                                bool value)
 {