net: r8169: convert to hw_features

Simple conversion with a bit of needed cleanup.

This also fixes:
 - confusion around vlan_features in rtl8169_vlan_mode(),
 - problem with broken TSO for too big MTU (the limit is set
   at 0xFFF --- max MSS field value).

SG+IP_CSUM+TSO is left disabled by default, based on suggestion by
David Dillow.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 33 insertions, 62 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index caa99cdb5818..058524f3eb49 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1286,14 +1286,15 @@ static int rtl8169_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
         return ret;
 }
 
-static u32 rtl8169_get_rx_csum(struct net_device *dev)
+static u32 rtl8169_fix_features(struct net_device *dev, u32 features)
 {
-        struct rtl8169_private *tp = netdev_priv(dev);
+        if (dev->mtu > MSSMask)
+                features &= ~NETIF_F_ALL_TSO;
 
-        return tp->cp_cmd & RxChkSum;
+        return features;
 }
 
-static int rtl8169_set_rx_csum(struct net_device *dev, u32 data)
+static int rtl8169_set_features(struct net_device *dev, u32 features)
 {
         struct rtl8169_private *tp = netdev_priv(dev);
         void __iomem *ioaddr = tp->mmio_addr;
@@ -1301,11 +1302,16 @@ static int rtl8169_set_rx_csum(struct net_device *dev, u32 data)
 
         spin_lock_irqsave(&tp->lock, flags);
 
-        if (data)
+        if (features & NETIF_F_RXCSUM)
                 tp->cp_cmd |= RxChkSum;
         else
                 tp->cp_cmd &= ~RxChkSum;
 
+        if (dev->features & NETIF_F_HW_VLAN_RX)
+                tp->cp_cmd |= RxVlan;
+        else
+                tp->cp_cmd &= ~RxVlan;
+
         RTL_W16(CPlusCmd, tp->cp_cmd);
         RTL_R16(CPlusCmd);
 
@@ -1321,27 +1327,6 @@ static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
                 TxVlanTag | swab16(vlan_tx_tag_get(skb)) : 0x00;
 }
 
-#define NETIF_F_HW_VLAN_TX_RX   (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX)
-
-static void rtl8169_vlan_mode(struct net_device *dev)
-{
-        struct rtl8169_private *tp = netdev_priv(dev);
-        void __iomem *ioaddr = tp->mmio_addr;
-        unsigned long flags;
-
-        spin_lock_irqsave(&tp->lock, flags);
-        if (dev->features & NETIF_F_HW_VLAN_RX)
-                tp->cp_cmd |= RxVlan;
-        else
-                tp->cp_cmd &= ~RxVlan;
-        RTL_W16(CPlusCmd, tp->cp_cmd);
-        /* PCI commit */
-        RTL_R16(CPlusCmd);
-        spin_unlock_irqrestore(&tp->lock, flags);
-
-        dev->vlan_features = dev->features &~ NETIF_F_HW_VLAN_TX_RX;
-}
-
 static void rtl8169_rx_vlan_tag(struct RxDesc *desc, struct sk_buff *skb)
 {
         u32 opts2 = le32_to_cpu(desc->opts2);
@@ -1522,28 +1507,6 @@ static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
         }
 }
 
-static int rtl8169_set_flags(struct net_device *dev, u32 data)
-{
-        struct rtl8169_private *tp = netdev_priv(dev);
-        unsigned long old_feat = dev->features;
-        int rc;
-
-        if ((tp->mac_version == RTL_GIGA_MAC_VER_05) &&
-            !(data & ETH_FLAG_RXVLAN)) {
-                netif_info(tp, drv, dev, "8110SCd requires hardware Rx VLAN\n");
-                return -EINVAL;
-        }
-
-        rc = ethtool_op_set_flags(dev, data, ETH_FLAG_TXVLAN | ETH_FLAG_RXVLAN);
-        if (rc)
-                return rc;
-
-        if ((old_feat ^ dev->features) & NETIF_F_HW_VLAN_RX)
-                rtl8169_vlan_mode(dev);
-
-        return 0;
-}
-
 static const struct ethtool_ops rtl8169_ethtool_ops = {
         .get_drvinfo            = rtl8169_get_drvinfo,
         .get_regs_len           = rtl8169_get_regs_len,
@@ -1552,19 +1515,12 @@ static const struct ethtool_ops rtl8169_ethtool_ops = {
         .set_settings           = rtl8169_set_settings,
         .get_msglevel           = rtl8169_get_msglevel,
         .set_msglevel           = rtl8169_set_msglevel,
-        .get_rx_csum            = rtl8169_get_rx_csum,
-        .set_rx_csum            = rtl8169_set_rx_csum,
-        .set_tx_csum            = ethtool_op_set_tx_csum,
-        .set_sg                 = ethtool_op_set_sg,
-        .set_tso                = ethtool_op_set_tso,
         .get_regs               = rtl8169_get_regs,
         .get_wol                = rtl8169_get_wol,
         .set_wol                = rtl8169_set_wol,
         .get_strings            = rtl8169_get_strings,
         .get_sset_count         = rtl8169_get_sset_count,
         .get_ethtool_stats      = rtl8169_get_ethtool_stats,
-        .set_flags              = rtl8169_set_flags,
-        .get_flags              = ethtool_op_get_flags,
 };
 
 static void rtl8169_get_mac_version(struct rtl8169_private *tp,
@@ -2979,6 +2935,8 @@ static const struct net_device_ops rtl8169_netdev_ops = {
         .ndo_tx_timeout         = rtl8169_tx_timeout,
         .ndo_validate_addr      = eth_validate_addr,
         .ndo_change_mtu         = rtl8169_change_mtu,
+        .ndo_fix_features       = rtl8169_fix_features,
+        .ndo_set_features       = rtl8169_set_features,
         .ndo_set_mac_address    = rtl_set_mac_address,
         .ndo_do_ioctl           = rtl8169_ioctl,
         .ndo_set_multicast_list = rtl_set_rx_mode,
@@ -3425,7 +3383,19 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
         netif_napi_add(dev, &tp->napi, rtl8169_poll, R8169_NAPI_WEIGHT);
 
-        dev->features |= NETIF_F_HW_VLAN_TX_RX | NETIF_F_GRO;
+        /* don't enable SG, IP_CSUM and TSO by default - it might not work
+         * properly for all devices */
+        dev->features |= NETIF_F_RXCSUM |
+                NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
+
+        dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
+                NETIF_F_RXCSUM | NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
+        dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
+                NETIF_F_HIGHDMA;
+
+        if (tp->mac_version == RTL_GIGA_MAC_VER_05)
+                /* 8110SCd requires hardware Rx VLAN - disallow toggling */
+                dev->hw_features &= ~NETIF_F_HW_VLAN_RX;
 
         tp->intr_mask = 0xffff;
         tp->hw_start = cfg->hw_start;
@@ -3545,7 +3515,7 @@ static int rtl8169_open(struct net_device *dev)
 
         rtl8169_init_phy(dev, tp);
 
-        rtl8169_vlan_mode(dev);
+        rtl8169_set_features(dev, dev->features);
 
         rtl_pll_power_up(tp);
 
@@ -4318,6 +4288,8 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
                 return -EINVAL;
 
         dev->mtu = new_mtu;
+        netdev_update_features(dev);
+
         return 0;
 }
 
@@ -4642,12 +4614,11 @@ err_out:
 
 static inline u32 rtl8169_tso_csum(struct sk_buff *skb, struct net_device *dev)
 {
-        if (dev->features & NETIF_F_TSO) {
-                u32 mss = skb_shinfo(skb)->gso_size;
+        u32 mss = skb_shinfo(skb)->gso_size;
+
+        if (mss)
+                return LargeSend | ((mss & MSSMask) << MSSShift);
 
-                if (mss)
-                        return LargeSend | ((mss & MSSMask) << MSSShift);
-        }
         if (skb->ip_summed == CHECKSUM_PARTIAL) {
                 const struct iphdr *ip = ip_hdr(skb);