iwlwifi: mvm: allow to disable beacon filtering for AP/GO interface

When in AP mode we need to filter in beacons from other APs to update HT
operation mode. As a power optimization the beacons are filtered out when
there are no associated stations. As a result, when there are no
associated stations, we will not update the HT operation mode until a
station connects.
Add a debugfs parameter that allows to disable this optimization.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

4 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 005cc09757d2..c529e5355803 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -1548,6 +1548,9 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
                                  mvm->debugfs_dir,
                                  &mvm->scan_iter_notif_enabled))
                 goto err;
+        if (!debugfs_create_bool("drop_bcn_ap_mode", S_IRUSR | S_IWUSR,
+                                 mvm->debugfs_dir, &mvm->drop_bcn_ap_mode))
+                goto err;
 
 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING) {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
index 62927f567afc..535134d639e0 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
@@ -744,7 +744,7 @@ static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
                  * wake-ups.
                  */
                 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
-                if (mvmvif->ap_assoc_sta_count) {
+                if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
                         cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
                         IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
                 } else {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 747f7eb80f47..ebe37bb0ce4c 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -859,6 +859,12 @@ struct iwl_mvm {
 
         u32 ciphers[6];
         struct iwl_mvm_tof_data tof_data;
+
+        /*
+         * Drop beacons from other APs in AP mode when there are no connected
+         * clients.
+         */
+        bool drop_bcn_ap_mode;
 };
 
 /* Extract MVM priv from op_mode and _hw */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index 325ff8aa33f5..09a94a5efb61 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -492,6 +492,7 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
         }
         mvm->sf_state = SF_UNINIT;
         mvm->cur_ucode = IWL_UCODE_INIT;
+        mvm->drop_bcn_ap_mode = true;
 
         mutex_init(&mvm->mutex);
         mutex_init(&mvm->d0i3_suspend_mutex);