rt2x00: Move crypto TX descriptor handling to rt2x00crypto.c

Move all code which determines the right TX descriptor
fields specific to crypto support into rt2x00crypto.c.
This makes the code in rt2x00queue more simpler and
better concentrates all crypto code into a single location.

With this we can also remove some ifdefs in rt2x00queue.c
since the code inside the ifdef is either very small, or
only calling empty functions (see empty function definitions
in rt2x00lib.h).

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

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00crypto.c b/drivers/net/wireless/rt2x00/rt2x00crypto.c
index c6709b392165..37ad0d2fb64c 100644
--- a/drivers/net/wireless/rt2x00/rt2x00crypto.c
+++ b/drivers/net/wireless/rt2x00/rt2x00crypto.c
@@ -46,6 +46,29 @@ enum cipher rt2x00crypto_key_to_cipher(struct ieee80211_key_conf *key)
         }
 }
 
+void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
+                                       struct txentry_desc *txdesc)
+{
+        struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
+        struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
+
+        __set_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags);
+
+        txdesc->cipher = rt2x00crypto_key_to_cipher(hw_key);
+
+        if (hw_key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
+                __set_bit(ENTRY_TXD_ENCRYPT_PAIRWISE, &txdesc->flags);
+
+        txdesc->key_idx = hw_key->hw_key_idx;
+        txdesc->iv_offset = ieee80211_get_hdrlen_from_skb(entry->skb);
+
+        if (!(hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
+                __set_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc->flags);
+
+        if (!(hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC))
+                __set_bit(ENTRY_TXD_ENCRYPT_MMIC, &txdesc->flags);
+}
+
 unsigned int rt2x00crypto_tx_overhead(struct ieee80211_tx_info *tx_info)
 {
         struct ieee80211_key_conf *key = tx_info->control.hw_key;