wl12xx: add TX_HW_ATTR_HOST_ENCRYPT flag

In WEP shared authentication, we encrypt the auth frame
in the host, and we want the fw to pass it as-is.
Use the TX_HW_ATTR_HOST_ENCRYPT flag in order to indicate
it to the fw.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

2 files changed, 14 insertions, 4 deletions

diff --git a/drivers/net/wireless/wl12xx/tx.c b/drivers/net/wireless/wl12xx/tx.c
index ee313e7ce8fe..1f5cc2af5bc6 100644
--- a/drivers/net/wireless/wl12xx/tx.c
+++ b/drivers/net/wireless/wl12xx/tx.c
@@ -255,16 +255,20 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
         int aligned_len, ac, rate_idx;
         s64 hosttime;
         u16 tx_attr = 0;
+        __le16 frame_control;
+        struct ieee80211_hdr *hdr;
+        u8 *frame_start;
         bool is_dummy;
 
         desc = (struct wl1271_tx_hw_descr *) skb->data;
+        frame_start = (u8 *)(desc + 1);
+        hdr = (struct ieee80211_hdr *)(frame_start + extra);
+        frame_control = hdr->frame_control;
 
         /* relocate space for security header */
         if (extra) {
-                void *framestart = skb->data + sizeof(*desc);
-                u16 fc = *(u16 *)(framestart + extra);
-                int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc));
-                memmove(framestart, framestart + extra, hdrlen);
+                int hdrlen = ieee80211_hdrlen(frame_control);
+                memmove(frame_start, hdr, hdrlen);
         }
 
         /* configure packet life time */
@@ -353,6 +357,11 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                              desc->wl127x_mem.total_mem_blocks);
         }
 
+        /* for WEP shared auth - no fw encryption is needed */
+        if (ieee80211_is_auth(frame_control) &&
+            ieee80211_has_protected(frame_control))
+                tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
+
         desc->tx_attr = cpu_to_le16(tx_attr);
 }
 
diff --git a/drivers/net/wireless/wl12xx/tx.h b/drivers/net/wireless/wl12xx/tx.h
index 2dbb24e6d541..7ceb3ceaa648 100644
--- a/drivers/net/wireless/wl12xx/tx.h
+++ b/drivers/net/wireless/wl12xx/tx.h
@@ -39,6 +39,7 @@
 #define TX_HW_ATTR_LAST_WORD_PAD         (BIT(10) | BIT(11))
 #define TX_HW_ATTR_TX_CMPLT_REQ          BIT(12)
 #define TX_HW_ATTR_TX_DUMMY_REQ          BIT(13)
+#define TX_HW_ATTR_HOST_ENCRYPT          BIT(14)
 
 #define TX_HW_ATTR_OFST_SAVE_RETRIES     0
 #define TX_HW_ATTR_OFST_HEADER_PAD       1