wlcore/wl18xx: add hw op for Rx HW checksum

Some chip families can checksum certain classes of Rx packets in FW.
Implement the Rx-checksum feature as a HW-op. For the 18xx chip-family,
set Rx-checsum according to indication from FW.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c
index c47f52c81a72..90fccb775727 100644
--- a/drivers/net/wireless/ti/wl18xx/main.c
+++ b/drivers/net/wireless/ti/wl18xx/main.c
@@ -39,6 +39,8 @@
 #include "wl18xx.h"
 
 
+#define WL18XX_RX_CHECKSUM_MASK      0x40
+
 static const u8 wl18xx_rate_to_idx_2ghz[] = {
         /* MCS rates are used only with 11n */
         15,                            /* WL18XX_CONF_HW_RXTX_RATE_MCS15 */
@@ -534,6 +536,14 @@ static void wl18xx_set_tx_desc_csum(struct wl1271 *wl,
         desc->wl18xx_checksum_data |= (ip_hdr->protocol & 0x01);
 }
 
+static void wl18xx_set_rx_csum(struct wl1271 *wl,
+                               struct wl1271_rx_descriptor *desc,
+                               struct sk_buff *skb)
+{
+        if (desc->status & WL18XX_RX_CHECKSUM_MASK)
+                skb->ip_summed = CHECKSUM_UNNECESSARY;
+}
+
 static struct wlcore_ops wl18xx_ops = {
         .identify_chip  = wl18xx_identify_chip,
         .boot           = wl18xx_boot,
@@ -548,6 +558,7 @@ static struct wlcore_ops wl18xx_ops = {
         .tx_delayed_compl = NULL,
         .hw_init        = wl18xx_hw_init,
         .set_tx_desc_csum = wl18xx_set_tx_desc_csum,
+        .set_rx_csum = wl18xx_set_rx_csum,
 };
 
 int __devinit wl18xx_probe(struct platform_device *pdev)