ixgb: convert to ndo_fix_features

Private rx_csum flags are now duplicate of netdev->features & NETIF_F_RXCSUM.
Removing this needs deeper surgery.

Things noticed:
 - ixgb has RX csum disabled by default
 - HW VLAN acceleration probably can be toggled, but it's left as is
 - the resets on RX csum offload change can probably be avoided
 - there is A LOT of copy-and-pasted code here

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

3 files changed, 31 insertions, 61 deletions

diff --git a/drivers/net/ethernet/intel/ixgb/ixgb.h b/drivers/net/ethernet/intel/ixgb/ixgb.h
index 49e8408f05fc..cb23448fe2fa 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb.h
+++ b/drivers/net/ethernet/intel/ixgb/ixgb.h
@@ -204,6 +204,8 @@ extern void ixgb_set_ethtool_ops(struct net_device *netdev);
 extern char ixgb_driver_name[];
 extern const char ixgb_driver_version[];
 
+extern void ixgb_set_speed_duplex(struct net_device *netdev);
+
 extern int ixgb_up(struct ixgb_adapter *adapter);
 extern void ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog);
 extern void ixgb_reset(struct ixgb_adapter *adapter);
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_ethtool.c b/drivers/net/ethernet/intel/ixgb/ixgb_ethtool.c
index 6da890b9534c..fdb30cc60173 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_ethtool.c
@@ -115,7 +115,7 @@ ixgb_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
         return 0;
 }
 
-static void ixgb_set_speed_duplex(struct net_device *netdev)
+void ixgb_set_speed_duplex(struct net_device *netdev)
 {
         struct ixgb_adapter *adapter = netdev_priv(netdev);
         /* be optimistic about our link, since we were up before */
@@ -195,57 +195,6 @@ ixgb_set_pauseparam(struct net_device *netdev,
 }
 
 static u32
-ixgb_get_rx_csum(struct net_device *netdev)
-{
-        struct ixgb_adapter *adapter = netdev_priv(netdev);
-
-        return adapter->rx_csum;
-}
-
-static int
-ixgb_set_rx_csum(struct net_device *netdev, u32 data)
-{
-        struct ixgb_adapter *adapter = netdev_priv(netdev);
-
-        adapter->rx_csum = data;
-
-        if (netif_running(netdev)) {
-                ixgb_down(adapter, true);
-                ixgb_up(adapter);
-                ixgb_set_speed_duplex(netdev);
-        } else
-                ixgb_reset(adapter);
-        return 0;
-}
-
-static u32
-ixgb_get_tx_csum(struct net_device *netdev)
-{
-        return (netdev->features & NETIF_F_HW_CSUM) != 0;
-}
-
-static int
-ixgb_set_tx_csum(struct net_device *netdev, u32 data)
-{
-        if (data)
-                netdev->features |= NETIF_F_HW_CSUM;
-        else
-                netdev->features &= ~NETIF_F_HW_CSUM;
-
-        return 0;
-}
-
-static int
-ixgb_set_tso(struct net_device *netdev, u32 data)
-{
-        if (data)
-                netdev->features |= NETIF_F_TSO;
-        else
-                netdev->features &= ~NETIF_F_TSO;
-        return 0;
-}
-
-static u32
 ixgb_get_msglevel(struct net_device *netdev)
 {
         struct ixgb_adapter *adapter = netdev_priv(netdev);
@@ -736,14 +685,8 @@ static const struct ethtool_ops ixgb_ethtool_ops = {
         .set_ringparam = ixgb_set_ringparam,
         .get_pauseparam = ixgb_get_pauseparam,
         .set_pauseparam = ixgb_set_pauseparam,
-        .get_rx_csum = ixgb_get_rx_csum,
-        .set_rx_csum = ixgb_set_rx_csum,
-        .get_tx_csum = ixgb_get_tx_csum,
-        .set_tx_csum = ixgb_set_tx_csum,
-        .set_sg = ethtool_op_set_sg,
         .get_msglevel = ixgb_get_msglevel,
         .set_msglevel = ixgb_set_msglevel,
-        .set_tso = ixgb_set_tso,
         .get_strings = ixgb_get_strings,
         .set_phys_id = ixgb_set_phys_id,
         .get_sset_count = ixgb_get_sset_count,
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
index c8b9c9028bc0..b8fb16304598 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
@@ -325,6 +325,28 @@ ixgb_reset(struct ixgb_adapter *adapter)
         }
 }
 
+static int
+ixgb_set_features(struct net_device *netdev, u32 features)
+{
+        struct ixgb_adapter *adapter = netdev_priv(netdev);
+        u32 changed = features ^ netdev->features;
+
+        if (!(changed & NETIF_F_RXCSUM))
+                return 0;
+
+        adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
+
+        if (netif_running(netdev)) {
+                ixgb_down(adapter, true);
+                ixgb_up(adapter);
+                ixgb_set_speed_duplex(netdev);
+        } else
+                ixgb_reset(adapter);
+
+        return 0;
+}
+
+
 static const struct net_device_ops ixgb_netdev_ops = {
         .ndo_open               = ixgb_open,
         .ndo_stop               = ixgb_close,
@@ -340,6 +362,7 @@ static const struct net_device_ops ixgb_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
         .ndo_poll_controller    = ixgb_netpoll,
 #endif
+        .ndo_set_features       = ixgb_set_features,
 };
 
 /**
@@ -439,12 +462,14 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         if (err)
                 goto err_sw_init;
 
-        netdev->features = NETIF_F_SG |
-                           NETIF_F_HW_CSUM |
+        netdev->hw_features = NETIF_F_SG |
+                           NETIF_F_TSO |
+                           NETIF_F_HW_CSUM;
+        netdev->features = netdev->hw_features |
                            NETIF_F_HW_VLAN_TX |
                            NETIF_F_HW_VLAN_RX |
                            NETIF_F_HW_VLAN_FILTER;
-        netdev->features |= NETIF_F_TSO;
+        netdev->hw_features |= NETIF_F_RXCSUM;
 
         if (pci_using_dac) {
                 netdev->features |= NETIF_F_HIGHDMA;