cfg80211: add support for TID specific AMSDU configuration

This patch adds support to control per TID MSDU aggregation
using the NL80211_TID_CONFIG_ATTR_AMSDU_CTRL attribute.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20200424112905.26770-4-sergey.matyukevich.os@quantenna.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/cfg80211.h

@@ -640,8 +640,9 @@ struct cfg80211_chan_def {
  * @noack: noack configuration value for the TID
  * @retry_long: retry count value
  * @retry_short: retry count value
- * @ampdu: Enable/Disable aggregation
+ * @ampdu: Enable/Disable MPDU aggregation
  * @rtscts: Enable/Disable RTS/CTS
+ * @amsdu: Enable/Disable MSDU aggregation
  */
 struct cfg80211_tid_cfg {
 	bool config_override;
@@ -651,6 +652,7 @@ struct cfg80211_tid_cfg {
 	u8 retry_long, retry_short;
 	enum nl80211_tid_config ampdu;
 	enum nl80211_tid_config rtscts;
+	enum nl80211_tid_config amsdu;
 };
 
 /**

include/uapi/linux/nl80211.h

@@ -4844,12 +4844,15 @@ enum nl80211_tid_config {
  *	&NL80211_CMD_SET_TID_CONFIG. Its type is u8, min value is 1 and
  *	the max value is advertised by the driver in this attribute on
  *	output in wiphy capabilities.
- * @NL80211_TID_CONFIG_ATTR_AMPDU_CTRL: Enable/Disable aggregation for the TIDs
- *	specified in %NL80211_TID_CONFIG_ATTR_TIDS. Its type is u8, using
- *	the values from &nl80211_tid_config.
+ * @NL80211_TID_CONFIG_ATTR_AMPDU_CTRL: Enable/Disable MPDU aggregation
+ *	for the TIDs specified in %NL80211_TID_CONFIG_ATTR_TIDS.
+ *	Its type is u8, using the values from &nl80211_tid_config.
  * @NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL: Enable/Disable RTS_CTS for the TIDs
  *	specified in %NL80211_TID_CONFIG_ATTR_TIDS. It is u8 type, using
  *	the values from &nl80211_tid_config.
+ * @NL80211_TID_CONFIG_ATTR_AMSDU_CTRL: Enable/Disable MSDU aggregation
+ *	for the TIDs specified in %NL80211_TID_CONFIG_ATTR_TIDS.
+ *	Its type is u8, using the values from &nl80211_tid_config.
  */
 enum nl80211_tid_config_attr {
 	__NL80211_TID_CONFIG_ATTR_INVALID,
@@ -4863,6 +4866,7 @@ enum nl80211_tid_config_attr {
 	NL80211_TID_CONFIG_ATTR_RETRY_LONG,
 	NL80211_TID_CONFIG_ATTR_AMPDU_CTRL,
 	NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL,
+	NL80211_TID_CONFIG_ATTR_AMSDU_CTRL,
 
 	/* keep last */
 	__NL80211_TID_CONFIG_ATTR_AFTER_LAST,

net/wireless/nl80211.c

@@ -343,6 +343,8 @@ nl80211_tid_config_attr_policy[NL80211_TID_CONFIG_ATTR_MAX + 1] = {
 			NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
 	[NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL] =
 			NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
+	[NL80211_TID_CONFIG_ATTR_AMSDU_CTRL] =
+			NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
 };
 
 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
@@ -14080,6 +14082,12 @@ static int parse_tid_conf(struct cfg80211_registered_device *rdev,
 			nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL]);
 	}
 
+	if (attrs[NL80211_TID_CONFIG_ATTR_AMSDU_CTRL]) {
+		tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_AMSDU_CTRL);
+		tid_conf->amsdu =
+			nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_AMSDU_CTRL]);
+	}
+
 	if (peer)
 		mask = rdev->wiphy.tid_config_support.peer;
 	else