iwlwifi: mvm: don't enable MIMO when BT is active

Another step in the rate control / BT Coex integration

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

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index 2026999..d6beec7 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -1530,6 +1530,29 @@ static int rs_move_siso_to_other(struct iwl_mvm *mvm,
        u8 update_search_tbl_counter = 0;
        int ret;
 
+       switch (BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD)) {
+       case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
+               /* nothing */
+               break;
+       case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
+               /* avoid antenna B unless MIMO */
+               if (tbl->action == IWL_SISO_SWITCH_ANTENNA2)
+                       tbl->action = IWL_SISO_SWITCH_MIMO2_AB;
+               break;
+       case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
+       case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
+               /* avoid antenna B and MIMO */
+               valid_tx_ant =
+                       first_antenna(iwl_fw_valid_tx_ant(mvm->fw));
+               if (tbl->action != IWL_SISO_SWITCH_ANTENNA1)
+                       tbl->action = IWL_SISO_SWITCH_ANTENNA1;
+               break;
+       default:
+               IWL_ERR(mvm, "Invalid BT load %d",
+                       BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD));
+               break;
+       }
+
        start_action = tbl->action;
        while (1) {
                lq_sta->action_counter++;
@@ -1543,7 +1566,9 @@ static int rs_move_siso_to_other(struct iwl_mvm *mvm,
                             tx_chains_num <= 2))
                                break;
 
-                       if (window->success_ratio >= IWL_RS_GOOD_RATIO)
+                       if (window->success_ratio >= IWL_RS_GOOD_RATIO &&
+                           BT_MBOX_MSG(&mvm->last_bt_notif, 3,
+                                       TRAFFIC_LOAD) == 0)
                                break;
 
                        memcpy(search_tbl, tbl, sz);
@@ -1665,6 +1690,28 @@ static int rs_move_mimo2_to_other(struct iwl_mvm *mvm,
        u8 update_search_tbl_counter = 0;
        int ret;
 
+       switch (BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD)) {
+       case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
+               /* nothing */
+               break;
+       case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
+       case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
+               /* avoid antenna B and MIMO */
+               if (tbl->action != IWL_MIMO2_SWITCH_SISO_A)
+                       tbl->action = IWL_MIMO2_SWITCH_SISO_A;
+               break;
+       case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
+               /* avoid antenna B unless MIMO */
+               if (tbl->action == IWL_MIMO2_SWITCH_SISO_B ||
+                   tbl->action == IWL_MIMO2_SWITCH_SISO_C)
+                       tbl->action = IWL_MIMO2_SWITCH_SISO_A;
+               break;
+       default:
+               IWL_ERR(mvm, "Invalid BT load %d",
+                       BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD));
+               break;
+       }
+
        start_action = tbl->action;
        while (1) {
                lq_sta->action_counter++;
@@ -1802,6 +1849,28 @@ static int rs_move_mimo3_to_other(struct iwl_mvm *mvm,
        int ret;
        u8 update_search_tbl_counter = 0;
 
+       switch (BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD)) {
+       case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
+               /* nothing */
+               break;
+       case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
+       case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
+               /* avoid antenna B and MIMO */
+               if (tbl->action != IWL_MIMO3_SWITCH_SISO_A)
+                       tbl->action = IWL_MIMO3_SWITCH_SISO_A;
+               break;
+       case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
+               /* avoid antenna B unless MIMO */
+               if (tbl->action == IWL_MIMO3_SWITCH_SISO_B ||
+                   tbl->action == IWL_MIMO3_SWITCH_SISO_C)
+                       tbl->action = IWL_MIMO3_SWITCH_SISO_A;
+               break;
+       default:
+               IWL_ERR(mvm, "Invalid BT load %d",
+                       BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD));
+               break;
+       }
+
        start_action = tbl->action;
        while (1) {
                lq_sta->action_counter++;
@@ -2313,6 +2382,32 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
             (current_tpt > (100 * tbl->expected_tpt[low]))))
                scale_action = 0;
 
+       if ((BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD) >=
+            IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
+            (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
+               if (lq_sta->last_bt_traffic >
+                   BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD)) {
+                       /*
+                        * don't set scale_action, don't want to scale up if
+                        * the rate scale doesn't otherwise think that is a
+                        * good idea.
+                        */
+               } else if (lq_sta->last_bt_traffic <=
+                          BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD)) {
+                       scale_action = -1;
+               }
+       }
+       lq_sta->last_bt_traffic =
+               BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD);
+
+       if ((BT_MBOX_MSG(&mvm->last_bt_notif, 3, TRAFFIC_LOAD) >=
+            IWL_BT_COEX_TRAFFIC_LOAD_HIGH) &&
+            (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) {
+               /* search for a new modulation */
+               rs_stay_in_table(lq_sta, true);
+               goto lq_update;
+       }
+
        switch (scale_action) {
        case -1:
                /* Decrease starting rate, update uCode's rate table */

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.h b/drivers/net/wireless/iwlwifi/mvm/rs.h
index f66155a..cff4f6d 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.h
@@ -358,6 +358,18 @@ struct iwl_lq_sta {
        u8 last_bt_traffic;
 };
 
+enum iwl_bt_coex_profile_traffic_load {
+       IWL_BT_COEX_TRAFFIC_LOAD_NONE           = 0,
+       IWL_BT_COEX_TRAFFIC_LOAD_LOW            = 1,
+       IWL_BT_COEX_TRAFFIC_LOAD_HIGH           = 2,
+       IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS     = 3,
+/*
+ * There are no more even though below is a u8, the
+ * indication from the BT device only has two bits.
+ */
+};
+
+
 static inline u8 num_of_ant(u8 mask)
 {
        return  !!((mask) & ANT_A) +