igb: Add the skeletons for tc-flower offloading

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

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 9a5c2dc3cf5a..26b0f0efc97e 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -36,6 +36,7 @@
 #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>
@@ -2513,6 +2514,69 @@ 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)
 {
@@ -2521,6 +2585,8 @@ 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;