ath10k: enable hw checksum for wcn3990

By default ath10k driver enables the support for HW_CHECKSUM
(NETIF_F_HW_CSUM). Since the TCP/UDP checksum calculation is not enabled
in the wcn3990 firmware the checksum is incorrect in the TCP/UDP packets
and all patckets are dropped. But due note that wcn3990 support in
ath10k is still incomplete so this isn't a critical fix (yet).

Enable hw checksum calculations in wcn3990 hardware by
setting the proper flags in msdu descriptor tso flags.

Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
index 4e5fe53..5d3ff80 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/htt.h
+++ b/drivers/net/wireless/ath/ath10k/htt.h
@@ -128,6 +128,19 @@ struct htt_msdu_ext_desc_64 {
                                 | HTT_MSDU_EXT_DESC_FLAG_TCP_IPV4_CSUM_ENABLE \
                                 | HTT_MSDU_EXT_DESC_FLAG_TCP_IPV6_CSUM_ENABLE)
 
+#define HTT_MSDU_EXT_DESC_FLAG_IPV4_CSUM_ENABLE_64             BIT(16)
+#define HTT_MSDU_EXT_DESC_FLAG_UDP_IPV4_CSUM_ENABLE_64         BIT(17)
+#define HTT_MSDU_EXT_DESC_FLAG_UDP_IPV6_CSUM_ENABLE_64         BIT(18)
+#define HTT_MSDU_EXT_DESC_FLAG_TCP_IPV4_CSUM_ENABLE_64         BIT(19)
+#define HTT_MSDU_EXT_DESC_FLAG_TCP_IPV6_CSUM_ENABLE_64         BIT(20)
+#define HTT_MSDU_EXT_DESC_FLAG_PARTIAL_CSUM_ENABLE_64          BIT(21)
+
+#define HTT_MSDU_CHECKSUM_ENABLE_64  (HTT_MSDU_EXT_DESC_FLAG_IPV4_CSUM_ENABLE_64 \
+                                    | HTT_MSDU_EXT_DESC_FLAG_UDP_IPV4_CSUM_ENABLE_64 \
+                                    | HTT_MSDU_EXT_DESC_FLAG_UDP_IPV6_CSUM_ENABLE_64 \
+                                    | HTT_MSDU_EXT_DESC_FLAG_TCP_IPV4_CSUM_ENABLE_64 \
+                                    | HTT_MSDU_EXT_DESC_FLAG_TCP_IPV6_CSUM_ENABLE_64)
+
 enum htt_data_tx_desc_flags0 {
        HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT = 1 << 0,
        HTT_DATA_TX_DESC_FLAGS0_NO_AGGR         = 1 << 1,

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index a086958..5d8b97a 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -1475,8 +1475,11 @@ static int ath10k_htt_tx_64(struct ath10k_htt *htt,
            !test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) {
                flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD;
                flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD;
-               if (ar->hw_params.continuous_frag_desc)
-                       ext_desc->flags |= HTT_MSDU_CHECKSUM_ENABLE;
+               if (ar->hw_params.continuous_frag_desc) {
+                       memset(ext_desc->tso_flag, 0, sizeof(ext_desc->tso_flag));
+                       ext_desc->tso_flag[3] |=
+                               __cpu_to_le32(HTT_MSDU_CHECKSUM_ENABLE_64);
+               }
        }
 
        /* Prevent firmware from sending up tx inspection requests. There's