net: add tc offload feature flag

Its useful to turn off the qdisc offload feature at a per device
level. This gives us a big hammer to enable/disable offloading.
More fine grained control (i.e. per rule) may be supported later.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index d9654f0..a734bf4 100644 (file)
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -67,6 +67,8 @@ enum {
        NETIF_F_HW_L2FW_DOFFLOAD_BIT,   /* Allow L2 Forwarding in Hardware */
        NETIF_F_BUSY_POLL_BIT,          /* Busy poll */
 
+       NETIF_F_HW_TC_BIT,              /* Offload TC infrastructure */
+
        /*
         * Add your fresh new feature above and remember to update
         * netdev_features_strings[] in net/core/ethtool.c and maybe
@@ -124,6 +126,7 @@ enum {
 #define NETIF_F_HW_VLAN_STAG_TX        __NETIF_F(HW_VLAN_STAG_TX)
 #define NETIF_F_HW_L2FW_DOFFLOAD       __NETIF_F(HW_L2FW_DOFFLOAD)
 #define NETIF_F_BUSY_POLL      __NETIF_F(BUSY_POLL)
+#define NETIF_F_HW_TC          __NETIF_F(HW_TC)
 
 #define for_each_netdev_feature(mask_addr, bit)        \
        for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 65f907a..c2d3118 100644 (file)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -98,6 +98,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
        [NETIF_F_RXALL_BIT] =            "rx-all",
        [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
        [NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
+       [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 };
 
 static const char