[next-queue PATCH v5 8/9] igb: Add the skeletons for tc-flower offloading

[Vinicius Costa Gomes]

This adds basic functions needed to implement offloading for filters
created by tc-flower.

Signed-off-by: Vinicius Costa Gomes <vinicius.go...@intel.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 66 +++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c 
b/drivers/net/ethernet/intel/igb/igb_main.c
index 52cd891aa579..150231e4db9d 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -35,6 +35,7 @@
 #include <net/checksum.h>
 #include <net/ip6_checksum.h>
 #include <net/pkt_sched.h>
+#include <net/pkt_cls.h>
 #include <linux/net_tstamp.h>
 #include <linux/mii.h>
 #include <linux/ethtool.h>
@@ -2497,6 +2498,69 @@ static int igb_offload_cbs(struct igb_adapter *adapter,
        return 0;
 }
 
+static int igb_configure_clsflower(struct igb_adapter *adapter,
+                                  struct tc_cls_flower_offload *cls_flower)
+{
+       return -EOPNOTSUPP;
+}
+
+static int igb_delete_clsflower(struct igb_adapter *adapter,
+                               struct tc_cls_flower_offload *cls_flower)
+{
+       return -EOPNOTSUPP;
+}
+
+static int igb_setup_tc_cls_flower(struct igb_adapter *adapter,
+                                  struct tc_cls_flower_offload *cls_flower)
+{
+       switch (cls_flower->command) {
+       case TC_CLSFLOWER_REPLACE:
+               return igb_configure_clsflower(adapter, cls_flower);
+       case TC_CLSFLOWER_DESTROY:
+               return igb_delete_clsflower(adapter, cls_flower);
+       case TC_CLSFLOWER_STATS:
+               return -EOPNOTSUPP;
+       default:
+               return -EINVAL;
+       }
+}
+
+static int igb_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
+                                void *cb_priv)
+{
+       struct igb_adapter *adapter = cb_priv;
+
+       if (!tc_cls_can_offload_and_chain0(adapter->netdev, type_data))
+               return -EOPNOTSUPP;
+
+       switch (type) {
+       case TC_SETUP_CLSFLOWER:
+               return igb_setup_tc_cls_flower(adapter, type_data);
+
+       default:
+               return -EOPNOTSUPP;
+       }
+}
+
+static int igb_setup_tc_block(struct igb_adapter *adapter,
+                             struct tc_block_offload *f)
+{
+       if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+               return -EOPNOTSUPP;
+
+       switch (f->command) {
+       case TC_BLOCK_BIND:
+               return tcf_block_cb_register(f->block, igb_setup_tc_block_cb,
+                                            adapter, adapter);
+       case TC_BLOCK_UNBIND:
+               tcf_block_cb_unregister(f->block, igb_setup_tc_block_cb,
+                                       adapter);
+               return 0;
+       default:
+               return -EOPNOTSUPP;
+       }
+}
+
 static int igb_setup_tc(struct net_device *dev, enum tc_setup_type type,
                        void *type_data)
 {
@@ -2505,6 +2569,8 @@ static int igb_setup_tc(struct net_device *dev, enum 
tc_setup_type type,
        switch (type) {
        case TC_SETUP_QDISC_CBS:
                return igb_offload_cbs(adapter, type_data);
+       case TC_SETUP_BLOCK:
+               return igb_setup_tc_block(adapter, type_data);
 
        default:
                return -EOPNOTSUPP;
-- 
2.16.2