wireless: Add NoAck per tid support

This patch contains the configuration changes in nl80211/cfg80211.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/linux/nl80211.h

@@ -538,6 +538,9 @@
  *	OLBC handling in hostapd. Beacons are reported in %NL80211_CMD_FRAME
  *	messages. Note that per PHY only one application may register.
  *
+ * @NL80211_CMD_SET_NOACK_MAP: sets a bitmap for the individual TIDs whether
+ *      No Acknowledgement Policy should be applied.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -675,6 +678,8 @@ enum nl80211_commands {
 
 	NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
 
+	NL80211_CMD_SET_NOACK_MAP,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -1185,6 +1190,9 @@ enum nl80211_commands {
  *    abides to when initiating radiation on DFS channels. A country maps
  *    to one DFS region.
  *
+ * @NL80211_ATTR_NOACK_MAP: This u16 bitmap contains the No Ack Policy of
+ *      up to 16 TIDs.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1428,6 +1436,8 @@ enum nl80211_attrs {
 	NL80211_ATTR_DISABLE_HT,
 	NL80211_ATTR_HT_CAPABILITY_MASK,
 
+	NL80211_ATTR_NOACK_MAP,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,

include/net/cfg80211.h

@@ -1465,6 +1465,8 @@ struct cfg80211_gtk_rekey_data {
  *
  * @probe_client: probe an associated client, must return a cookie that it
  *	later passes to cfg80211_probe_status().
+ *
+ * @set_noack_map: Set the NoAck Map for the TIDs.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -1658,6 +1660,10 @@ struct cfg80211_ops {
 	int	(*probe_client)(struct wiphy *wiphy, struct net_device *dev,
 				const u8 *peer, u64 *cookie);
 
+	int	(*set_noack_map)(struct wiphy *wiphy,
+				  struct net_device *dev,
+				  u16 noack_map);
+
 	struct ieee80211_channel *(*get_channel)(struct wiphy *wiphy);
 };
 

net/wireless/nl80211.c

@@ -204,6 +204,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 	[NL80211_ATTR_HT_CAPABILITY_MASK] = {
 		.len = NL80211_HT_CAPABILITY_LEN
 	},
+	[NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 };
 
 /* policy for the key attributes */
@@ -904,6 +905,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 		CMD(sched_scan_start, START_SCHED_SCAN);
 	CMD(probe_client, PROBE_CLIENT);
+	CMD(set_noack_map, SET_NOACK_MAP);
 	if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 		i++;
 		NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
@@ -1759,6 +1761,23 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
 	return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
 }
 
+static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev = info->user_ptr[0];
+	struct net_device *dev = info->user_ptr[1];
+	u16 noack_map;
+
+	if (!info->attrs[NL80211_ATTR_NOACK_MAP])
+		return -EINVAL;
+
+	if (!rdev->ops->set_noack_map)
+		return -EOPNOTSUPP;
+
+	noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
+
+	return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
+}
+
 struct get_key_cookie {
 	struct sk_buff *msg;
 	int error;
@@ -6604,6 +6623,15 @@ static struct genl_ops nl80211_ops[] = {
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
+	{
+		.cmd = NL80211_CMD_SET_NOACK_MAP,
+		.doit = nl80211_set_noack_map,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = NL80211_FLAG_NEED_NETDEV |
+				  NL80211_FLAG_NEED_RTNL,
+	},
+
 };
 
 static struct genl_multicast_group nl80211_mlme_mcgrp = {