iwlwifi: mvm: send the low latency command

Recently a new command was added to the firmware
for setting a MAC's low-latency mode.  Use it.

Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

2 files changed, 42 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h b/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h
index ec42c84e5df2..17c7ef1662a9 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h
@@ -68,6 +68,10 @@
  */
 enum iwl_mac_conf_subcmd_ids {
         /**
+         * @LOW_LATENCY_CMD: &struct iwl_mac_low_latency_cmd
+         */
+        LOW_LATENCY_CMD = 0x3,
+        /**
          * @CHANNEL_SWITCH_NOA_NOTIF: &struct iwl_channel_switch_noa_notif
          */
         CHANNEL_SWITCH_NOA_NOTIF = 0xFF,
@@ -82,4 +86,19 @@ struct iwl_channel_switch_noa_notif {
         __le32 id_and_color;
 } __packed; /* CHANNEL_SWITCH_START_NTFY_API_S_VER_1 */
 
+/**
+ * struct iwl_mac_low_latency_cmd - set/clear mac to 'low-latency mode'
+ *
+ * @mac_id: MAC ID to whom to apply the low-latency configurations
+ * @low_latency_rx: 1/0 to set/clear Rx low latency direction
+ * @low_latency_tx: 1/0 to set/clear Tx low latency direction
+ * @reserved: reserved for alignment purposes
+ */
+struct iwl_mac_low_latency_cmd {
+        __le32 mac_id;
+        u8 low_latency_rx;
+        u8 low_latency_tx;
+        __le16 reserved;
+} __packed; /* MAC_LOW_LATENCY_API_S_VER_1 */
+
 #endif /* __iwl_fw_api_mac_cfg_h__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index b2e9a79d4186..2fead5eb63fe 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -1032,12 +1032,34 @@ int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 {
         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
         int res;
+        bool low_latency;
 
         lockdep_assert_held(&mvm->mutex);
 
-        if (iwl_mvm_vif_low_latency(mvmvif) == prev)
+        low_latency = iwl_mvm_vif_low_latency(mvmvif);
+
+        if (low_latency == prev)
                 return 0;
 
+        if (fw_has_capa(&mvm->fw->ucode_capa,
+                        IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) {
+                struct iwl_mac_low_latency_cmd cmd = {
+                        .mac_id = cpu_to_le32(mvmvif->id)
+                };
+
+                if (low_latency) {
+                        /* currently we don't care about the direction */
+                        cmd.low_latency_rx = 1;
+                        cmd.low_latency_tx = 1;
+                }
+                res = iwl_mvm_send_cmd_pdu(mvm,
+                                           iwl_cmd_id(LOW_LATENCY_CMD,
+                                                      MAC_CONF_GROUP, 0),
+                                           0, sizeof(cmd), &cmd);
+                if (res)
+                        IWL_ERR(mvm, "Failed to send low latency command\n");
+        }
+
         res = iwl_mvm_update_quotas(mvm, false, NULL);
         if (res)
                 return res;