net: lan743x: Add support for Rx IP & TCP checksum offload

Add Rx IP and TCP checksum offload

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 3f4e1ab..2599dff 100644 (file)
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -1585,6 +1585,9 @@ static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
                        rfctl |= RFE_CTL_AM_;
        }
 
+       if (netdev->features & NETIF_F_RXCSUM)
+               rfctl |= RFE_CTL_IP_COE_ | RFE_CTL_TCP_UDP_COE_;
+
        memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
        if (netdev_mc_count(netdev)) {
                struct netdev_hw_addr *ha;
@@ -2547,6 +2550,7 @@ static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
        int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
        struct lan743x_rx_buffer_info *buffer_info;
        int frame_length, buffer_length;
+       bool is_ice, is_tce, is_icsm;
        int extension_index = -1;
        bool is_last, is_first;
        struct sk_buff *skb;
@@ -2593,6 +2597,9 @@ static int lan743x_rx_process_buffer(struct lan743x_rx *rx)
        frame_length =
                RX_DESC_DATA0_FRAME_LENGTH_GET_(le32_to_cpu(descriptor->data0));
        buffer_length = buffer_info->buffer_length;
+       is_ice = le32_to_cpu(descriptor->data1) & RX_DESC_DATA1_STATUS_ICE_;
+       is_tce = le32_to_cpu(descriptor->data1) & RX_DESC_DATA1_STATUS_TCE_;
+       is_icsm = le32_to_cpu(descriptor->data1) & RX_DESC_DATA1_STATUS_ICSM_;
 
        netdev_dbg(netdev, "%s%schunk: %d/%d",
                   is_first ? "first " : "      ",
@@ -2661,6 +2668,10 @@ process_extension:
        if (is_last && rx->skb_head) {
                rx->skb_head->protocol = eth_type_trans(rx->skb_head,
                                                        rx->adapter->netdev);
+               if (rx->adapter->netdev->features & NETIF_F_RXCSUM) {
+                       if (!is_ice && !is_tce && !is_icsm)
+                               skb->ip_summed = CHECKSUM_UNNECESSARY;
+               }
                netdev_dbg(netdev, "sending %d byte frame to OS",
                           rx->skb_head->len);
                napi_gro_receive(&rx->napi, rx->skb_head);
@@ -3383,7 +3394,8 @@ static int lan743x_pcidev_probe(struct pci_dev *pdev,
 
        adapter->netdev->netdev_ops = &lan743x_netdev_ops;
        adapter->netdev->ethtool_ops = &lan743x_ethtool_ops;
-       adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
+       adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO |
+                                   NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
        adapter->netdev->hw_features = adapter->netdev->features;
 
        /* carrier off reporting is important to ethtool even BEFORE open */

diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 58eb7ab..67877d3 100644 (file)
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -266,6 +266,8 @@
 #define RFE_ADDR_FILT_LO(x)            (0x404 + (8 * (x)))
 
 #define RFE_CTL                                (0x508)
+#define RFE_CTL_TCP_UDP_COE_           BIT(12)
+#define RFE_CTL_IP_COE_                        BIT(11)
 #define RFE_CTL_AB_                    BIT(10)
 #define RFE_CTL_AM_                    BIT(9)
 #define RFE_CTL_AU_                    BIT(8)
@@ -1121,6 +1123,9 @@ struct lan743x_tx_buffer_info {
        (((data0) & RX_DESC_DATA0_FRAME_LENGTH_MASK_) >> 16)
 #define RX_DESC_DATA0_EXT_                (0x00004000)
 #define RX_DESC_DATA0_BUF_LENGTH_MASK_    (0x00003FFF)
+#define RX_DESC_DATA1_STATUS_ICE_         (0x00020000)
+#define RX_DESC_DATA1_STATUS_TCE_         (0x00010000)
+#define RX_DESC_DATA1_STATUS_ICSM_        (0x00000001)
 #define RX_DESC_DATA2_TS_NS_MASK_         (0x3FFFFFFF)
 
 #if ((NET_IP_ALIGN != 0) && (NET_IP_ALIGN != 2))