rt2x00: Implement HW encryption

Various rt2x00 devices support hardware encryption.

Most of them require the IV/EIV to be generated by mac80211,
but require it to be provided seperately instead of within
the frame itself. This means that rt2x00lib should extract
the data from the frame and place it in the frame descriptor.
During RX the IV/EIV is provided in the descriptor by the
hardware which means that it should be inserted into the
frame by rt2x00lib.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h
index c5fb3a72cf37..7bbc16b1b6c6 100644
--- a/drivers/net/wireless/rt2x00/rt2x00lib.h
+++ b/drivers/net/wireless/rt2x00/rt2x00lib.h
@@ -181,6 +181,8 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev);
 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev);
 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
                             enum rt2x00_dump_type type, struct sk_buff *skb);
+void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
+                               enum cipher cipher, enum rx_crypto status);
 #else
 static inline void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 {
@@ -195,9 +197,54 @@ static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
                                           struct sk_buff *skb)
 {
 }
+
+static inline void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
+                                             enum cipher cipher,
+                                             enum rx_crypto status)
+{
+}
 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 
 /*
+ * Crypto handlers.
+ */
+#ifdef CONFIG_RT2X00_LIB_CRYPTO
+enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key);
+unsigned int rt2x00crypto_tx_overhead(struct ieee80211_tx_info *tx_info);
+void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, unsigned int iv_len);
+void rt2x00crypto_tx_insert_iv(struct sk_buff *skb);
+void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, unsigned int align,
+                               unsigned int header_length,
+                               struct rxdone_entry_desc *rxdesc);
+#else
+static inline enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
+{
+        return CIPHER_NONE;
+}
+
+static inline unsigned int rt2x00crypto_tx_overhead(struct ieee80211_tx_info *tx_info)
+{
+        return 0;
+}
+
+static inline void rt2x00crypto_tx_remove_iv(struct sk_buff *skb,
+                                             unsigned int iv_len)
+{
+}
+
+static inline void rt2x00crypto_tx_insert_iv(struct sk_buff *skb)
+{
+}
+
+static inline void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
+                                             unsigned int align,
+                                             unsigned int header_length,
+                                             struct rxdone_entry_desc *rxdesc)
+{
+}
+#endif
+
+/*
  * RFkill handlers.
  */
 #ifdef CONFIG_RT2X00_LIB_RFKILL