r8169: split rtl8169_tso_csum

According to the txd_version, split rtl8169_tso_csum() into
rtl8169_tso_csum_v1() and rtl8169_tso_csum_v2().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index be425ad..6b7e21a 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -633,32 +633,6 @@ enum rtl_tx_desc_bit_1 {
        TD1_UDP_CS      = (1 << 31),            /* Calculate UDP/IP checksum */
 };
 
-static const struct rtl_tx_desc_info {
-       struct {
-               u32 udp;
-               u32 tcp;
-       } checksum;
-       u16 mss_shift;
-       u16 opts_offset;
-} tx_desc_info [] = {
-       [RTL_TD_0] = {
-               .checksum = {
-                       .udp    = TD0_IP_CS | TD0_UDP_CS,
-                       .tcp    = TD0_IP_CS | TD0_TCP_CS
-               },
-               .mss_shift      = TD0_MSS_SHIFT,
-               .opts_offset    = 0
-       },
-       [RTL_TD_1] = {
-               .checksum = {
-                       .udp    = TD1_IP_CS | TD1_UDP_CS,
-                       .tcp    = TD1_IP_CS | TD1_TCP_CS
-               },
-               .mss_shift      = TD1_MSS_SHIFT,
-               .opts_offset    = 1
-       }
-};
-
 enum rtl_rx_desc_bit {
        /* Rx private */
        PID1            = (1 << 18), /* Protocol ID bit 1/2 */
@@ -782,6 +756,7 @@ struct rtl8169_private {
        unsigned int (*phy_reset_pending)(struct rtl8169_private *tp);
        unsigned int (*link_ok)(void __iomem *);
        int (*do_ioctl)(struct rtl8169_private *tp, struct mii_ioctl_data *data, int cmd);
+       bool (*tso_csum)(struct rtl8169_private *, struct sk_buff *, u32 *);
 
        struct {
                DECLARE_BITMAP(flags, RTL_FLAG_MAX);
@@ -5941,16 +5916,36 @@ static bool rtl_test_hw_pad_bug(struct rtl8169_private *tp, struct sk_buff *skb)
        return skb->len < ETH_ZLEN && tp->mac_version == RTL_GIGA_MAC_VER_34;
 }
 
-static inline bool rtl8169_tso_csum(struct rtl8169_private *tp,
-                                   struct sk_buff *skb, u32 *opts)
+static bool rtl8169_tso_csum_v1(struct rtl8169_private *tp,
+                               struct sk_buff *skb, u32 *opts)
 {
-       const struct rtl_tx_desc_info *info = tx_desc_info + tp->txd_version;
        u32 mss = skb_shinfo(skb)->gso_size;
-       int offset = info->opts_offset;
 
        if (mss) {
                opts[0] |= TD_LSO;
-               opts[offset] |= min(mss, TD_MSS_MAX) << info->mss_shift;
+               opts[0] |= min(mss, TD_MSS_MAX) << TD0_MSS_SHIFT;
+       } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
+               const struct iphdr *ip = ip_hdr(skb);
+
+               if (ip->protocol == IPPROTO_TCP)
+                       opts[0] |= TD0_IP_CS | TD0_TCP_CS;
+               else if (ip->protocol == IPPROTO_UDP)
+                       opts[0] |= TD0_IP_CS | TD0_UDP_CS;
+               else
+                       WARN_ON_ONCE(1);
+       }
+
+       return true;
+}
+
+static bool rtl8169_tso_csum_v2(struct rtl8169_private *tp,
+                               struct sk_buff *skb, u32 *opts)
+{
+       u32 mss = skb_shinfo(skb)->gso_size;
+
+       if (mss) {
+               opts[0] |= TD_LSO;
+               opts[1] |= min(mss, TD_MSS_MAX) << TD1_MSS_SHIFT;
        } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
                const struct iphdr *ip = ip_hdr(skb);
 
@@ -5958,15 +5953,16 @@ static inline bool rtl8169_tso_csum(struct rtl8169_private *tp,
                        return skb_checksum_help(skb) == 0 && rtl_skb_pad(skb);
 
                if (ip->protocol == IPPROTO_TCP)
-                       opts[offset] |= info->checksum.tcp;
+                       opts[1] |= TD1_IP_CS | TD1_TCP_CS;
                else if (ip->protocol == IPPROTO_UDP)
-                       opts[offset] |= info->checksum.udp;
+                       opts[1] |= TD1_IP_CS | TD1_UDP_CS;
                else
                        WARN_ON_ONCE(1);
        } else {
                if (unlikely(rtl_test_hw_pad_bug(tp, skb)))
                        return rtl_skb_pad(skb);
        }
+
        return true;
 }
 
@@ -5994,7 +5990,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
        opts[1] = cpu_to_le32(rtl8169_tx_vlan_tag(skb));
        opts[0] = DescOwn;
 
-       if (!rtl8169_tso_csum(tp, skb, opts))
+       if (!tp->tso_csum(tp, skb, opts))
                goto err_update_stats;
 
        len = skb_headlen(skb);
@@ -7145,6 +7141,13 @@ rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                /* 8110SCd requires hardware Rx VLAN - disallow toggling */
                dev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
 
+       if (tp->txd_version == RTL_TD_0)
+               tp->tso_csum = rtl8169_tso_csum_v1;
+       else if (tp->txd_version == RTL_TD_1)
+               tp->tso_csum = rtl8169_tso_csum_v2;
+       else
+               WARN_ON_ONCE(1);
+
        dev->hw_features |= NETIF_F_RXALL;
        dev->hw_features |= NETIF_F_RXFCS;