mwifiex: use separate AMPDU tx/rx window sizes in 11ac networks

Newer 11ac enabled chipsets have more TX and RX buffers in FW
and hardware; so they may support larger TX and RX window sizes
for BA. Reset BA settings during association, adhoc join/start
or start_ap() if we are joining/creating 11ac network.
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Sagar Bijwe <bsagar@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/11ac.c

@@ -278,3 +278,25 @@ int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
 
 	return 0;
 }
+
+/* This function initializes the BlockACK setup information for given
+ * mwifiex_private structure for 11ac enabled networks.
+ */
+void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
+{
+	priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
+
+	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
+		priv->add_ba_param.tx_win_size =
+					   MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE;
+		priv->add_ba_param.rx_win_size =
+					   MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE;
+	} else {
+		priv->add_ba_param.tx_win_size =
+					   MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
+		priv->add_ba_param.rx_win_size =
+					   MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
+	}
+
+	return;
+}

drivers/net/wireless/mwifiex/cfg80211.c

@@ -1381,6 +1381,11 @@ static int mwifiex_cfg80211_start_ap(struct wiphy *wiphy,
 				      priv->ap_11ac_enabled);
 	}
 
+	if (priv->ap_11ac_enabled)
+		mwifiex_set_11ac_ba_params(priv);
+	else
+		mwifiex_set_ba_params(priv);
+
 	mwifiex_set_wmm_params(priv, bss_cfg, params);
 
 	if (params->inactivity_timeout > 0) {

drivers/net/wireless/mwifiex/decl.h

@@ -45,6 +45,10 @@
 #define MWIFIEX_STA_AMPDU_DEF_RXWINSIZE        32
 #define MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE        32
 #define MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE        16
+#define MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE   32
+#define MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE   48
+#define MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE   48
+#define MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE   32
 
 #define MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT  0xffff
 

drivers/net/wireless/mwifiex/join.c

@@ -1295,6 +1295,14 @@ int mwifiex_associate(struct mwifiex_private *priv,
 	    (bss_desc->bss_mode != NL80211_IFTYPE_STATION))
 		return -1;
 
+	if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
+	    !bss_desc->disable_11n && !bss_desc->disable_11ac &&
+	    (priv->adapter->config_bands & BAND_GAC ||
+	     priv->adapter->config_bands & BAND_AAC))
+		mwifiex_set_11ac_ba_params(priv);
+	else
+		mwifiex_set_ba_params(priv);
+
 	memcpy(&current_bssid,
 	       &priv->curr_bss_params.bss_descriptor.mac_address,
 	       sizeof(current_bssid));
@@ -1323,6 +1331,13 @@ mwifiex_adhoc_start(struct mwifiex_private *priv,
 	dev_dbg(priv->adapter->dev, "info: curr_bss_params.band = %d\n",
 		priv->curr_bss_params.band);
 
+	if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
+	    (priv->adapter->config_bands & BAND_GAC ||
+	     priv->adapter->config_bands & BAND_AAC))
+		mwifiex_set_11ac_ba_params(priv);
+	else
+		mwifiex_set_ba_params(priv);
+
 	return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_AD_HOC_START,
 				    HostCmd_ACT_GEN_SET, 0, adhoc_ssid);
 }
@@ -1356,6 +1371,14 @@ int mwifiex_adhoc_join(struct mwifiex_private *priv,
 		return -1;
 	}
 
+	if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
+	    !bss_desc->disable_11n && !bss_desc->disable_11ac &&
+	    (priv->adapter->config_bands & BAND_GAC ||
+	     priv->adapter->config_bands & BAND_AAC))
+		mwifiex_set_11ac_ba_params(priv);
+	else
+		mwifiex_set_ba_params(priv);
+
 	dev_dbg(priv->adapter->dev, "info: curr_bss_params.channel = %d\n",
 		priv->curr_bss_params.bss_descriptor.channel);
 	dev_dbg(priv->adapter->dev, "info: curr_bss_params.band = %c\n",

drivers/net/wireless/mwifiex/main.h

@@ -925,6 +925,7 @@ mwifiex_set_wmm_params(struct mwifiex_private *priv,
 		       struct mwifiex_uap_bss_param *bss_cfg,
 		       struct cfg80211_ap_settings *params);
 void mwifiex_set_ba_params(struct mwifiex_private *priv);
+void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv);
 
 /*
  * This function checks if the queuing is RA based or not.