iwlwifi: mvm: add infrastructure for tracking BA session in driver

According to the spec when a BA session is started there
is a timeout set for the session in the ADDBA request.
If there is not activity on the TA/TID then the session
expires and a DELBA is sent.
In order to check for the timeout, data must be shared
among the rx queues.
Add a timer that runs as long as BA session is active
for the station and stops aggregation session if needed.
This patch also lays the infrastructure for the reordering
buffer which will be enabled in the next patches.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 14b5f6ab53e2..ea1817a09768 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -613,6 +613,27 @@ struct iwl_mvm_shared_mem_cfg {
 	u32 internal_txfifo_size[TX_FIFO_INTERNAL_MAX_NUM];
 };
 
+/**
+ * struct iwl_mvm_baid_data - BA session data
+ * @sta_id: station id
+ * @tid: tid of the session
+ * @baid baid of the session
+ * @timeout: the timeout set in the addba request
+ * @last_rx: last rx jiffies, updated only if timeout passed from last update
+ * @session_timer: timer to check if BA session expired, runs at 2 * timeout
+ * @mvm: mvm pointer, needed for timer context
+ */
+struct iwl_mvm_baid_data {
+	struct rcu_head rcu_head;
+	u8 sta_id;
+	u8 tid;
+	u8 baid;
+	u16 timeout;
+	unsigned long last_rx;
+	struct timer_list session_timer;
+	struct iwl_mvm *mvm;
+};
+
 struct iwl_mvm {
 	/* for logger access */
 	struct device *dev;
@@ -922,6 +943,10 @@ struct iwl_mvm {
 	u32 ciphers[6];
 	struct iwl_mvm_tof_data tof_data;
 
+	struct ieee80211_vif *nan_vif;
+#define IWL_MAX_BAID	32
+	struct iwl_mvm_baid_data __rcu *baid_map[IWL_MAX_BAID];
+
 	/*
 	 * Drop beacons from other APs in AP mode when there are no connected
 	 * clients.