iwlwifi-2.6: enables HW TKIP encryption

This patch add support for TKIP encryption (TX) in HW.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 25 insertions, 9 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.h b/drivers/net/wireless/iwlwifi/iwl-4965.h
index 7baed4db2f3f..1d7e8f9cf5ee 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.h
@@ -481,6 +481,7 @@ struct iwl4965_tid_data {
 struct iwl4965_hw_key {
         enum ieee80211_key_alg alg;
         int keylen;
+        struct ieee80211_key_conf *conf;
         u8 key[32];
 };
 
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 8de301d1da8e..ae8fc8cb4d18 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -1393,7 +1393,27 @@ static int iwl4965_set_tkip_dynamic_key_info(struct iwl_priv *priv,
                                    struct ieee80211_key_conf *keyconf,
                                    u8 sta_id)
 {
-        return -EOPNOTSUPP;
+        unsigned long flags;
+        int ret = 0;
+
+        keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+        keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+        keyconf->hw_key_idx = keyconf->keyidx;
+
+        spin_lock_irqsave(&priv->sta_lock, flags);
+
+        priv->stations[sta_id].keyinfo.alg = keyconf->alg;
+        priv->stations[sta_id].keyinfo.conf = keyconf;
+        priv->stations[sta_id].keyinfo.keylen = 16;
+
+        /* This copy is acutally not needed: we get the key with each TX */
+        memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
+
+        memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
+
+        spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+        return ret;
 }
 
 static int iwl4965_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
@@ -2341,15 +2361,10 @@ static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
                 break;
 
         case ALG_TKIP:
-#if 0
                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
-
-                if (last_frag)
-                        memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
-                               8);
-                else
-                        memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
-#endif
+                ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
+                        IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
+                IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
                 break;
 
         case ALG_WEP: