mwifiex: add auto TDLS support

This patch adds auto TDLS support to mwifiex.

Auto TDLS functionality works as follows:
1. Whenever userspace application has triggered TDLS connection with
any peer, driver would store this peer mac address details in its database.
2. After this driver whenever driver receives packet on direct link,
it would store rssi and timestamp in peer information.
3. Whenever a packet is to be transmitted to non-AP peer in station mode,
driver would check if TDLS link can be established by looking at peer RSSI
information. Driver would initiate TDLS setup in such cases.
4. Periodic timer is used for updating peer information.
5. Auto TDLS peer list & timer are cleared during disconnection or driver unload.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index fa84888cf092..51a67f34c8cb 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -506,8 +506,11 @@ struct mwifiex_private {
         struct mwifiex_wmm_desc wmm;
         atomic_t wmm_tx_pending[IEEE80211_NUM_ACS];
         struct list_head sta_list;
-        /* spin lock for associated station list */
+        /* spin lock for associated station/TDLS peers list */
         spinlock_t sta_list_spinlock;
+        struct list_head auto_tdls_list;
+        /* spin lock for auto TDLS peer list */
+        spinlock_t auto_tdls_lock;
         struct list_head tx_ba_stream_tbl_ptr;
         /* spin lock for tx_ba_stream_tbl_ptr queue */
         spinlock_t tx_ba_stream_tbl_lock;
@@ -572,6 +575,9 @@ struct mwifiex_private {
         bool hs2_enabled;
         struct station_parameters *sta_params;
         struct sk_buff_head tdls_txq;
+        u8 check_tdls_tx;
+        struct timer_list auto_tdls_timer;
+        bool auto_tdls_timer_active;
 };
 
 enum mwifiex_ba_status {
@@ -671,6 +677,17 @@ struct mwifiex_sta_node {
         struct mwifiex_tdls_capab tdls_cap;
 };
 
+struct mwifiex_auto_tdls_peer {
+        struct list_head list;
+        u8 mac_addr[ETH_ALEN];
+        u8 tdls_status;
+        int rssi;
+        long rssi_jiffies;
+        u8 failure_count;
+        u8 do_discover;
+        u8 do_setup;
+};
+
 struct mwifiex_if_ops {
         int (*init_if) (struct mwifiex_adapter *);
         void (*cleanup_if) (struct mwifiex_adapter *);
@@ -848,6 +865,7 @@ struct mwifiex_adapter {
         struct mwifiex_chan_stats *chan_stats;
         u32 num_in_chan_stats;
         int survey_idx;
+        bool auto_tdls;
 };
 
 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter);
@@ -1305,6 +1323,17 @@ u8 mwifiex_get_center_freq_index(struct mwifiex_private *priv, u8 band,
                                  u32 pri_chan, u8 chan_bw);
 int mwifiex_init_channel_scan_gap(struct mwifiex_adapter *adapter);
 
+int mwifiex_tdls_check_tx(struct mwifiex_private *priv, struct sk_buff *skb);
+void mwifiex_flush_auto_tdls_list(struct mwifiex_private *priv);
+void mwifiex_auto_tdls_update_peer_status(struct mwifiex_private *priv,
+                                          const u8 *mac, u8 link_status);
+void mwifiex_auto_tdls_update_peer_signal(struct mwifiex_private *priv,
+                                          u8 *mac, s8 snr, s8 nflr);
+void mwifiex_check_auto_tdls(unsigned long context);
+void mwifiex_add_auto_tdls_peer(struct mwifiex_private *priv, const u8 *mac);
+void mwifiex_setup_auto_tdls_timer(struct mwifiex_private *priv);
+void mwifiex_clean_auto_tdls(struct mwifiex_private *priv);
+
 #ifdef CONFIG_DEBUG_FS
 void mwifiex_debugfs_init(void);
 void mwifiex_debugfs_remove(void);