cxgb4: add TC-MATCHALL classifier ingress offload

Add TC-MATCHALL classifier ingress offload support. The same actions
supported by existing TC-FLOWER offload can be applied to all incoming
traffic on the underlying interface.

Ensure the rule priority doesn't conflict with existing rules in the
TCAM. Only 1 ingress matchall rule can be active at a time on the
underlying interface.

v5:
- No change.

v4:
- Added check to ensure the matchall rule's prio doesn't conflict with
  other rules in TCAM.
- Added logic to fill default mask for VIID, if none has been
  provided, to prevent conflict with duplicate VIID rules.
- Used existing variables in private structure to fill VIID info,
  instead of extracting the info manually.

v3:
- No change.

v2:
- Removed logic to fetch free index from end of TCAM. Must maintain
  same ordering as in kernel.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h
index ce5b0800f0d8..ab6b5683dfd3 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h
@@ -17,8 +17,18 @@ struct cxgb4_matchall_egress_entry {
 	u64 cookie; /* Used to identify the MATCHALL rule offloaded */
 };
 
+struct cxgb4_matchall_ingress_entry {
+	enum cxgb4_matchall_state state; /* Current MATCHALL offload state */
+	u32 tid; /* Index to hardware filter entry */
+	struct ch_filter_specification fs; /* Filter entry */
+	u64 bytes; /* # of bytes hitting the filter */
+	u64 packets; /* # of packets hitting the filter */
+	u64 last_used; /* Last updated jiffies time */
+};
+
 struct cxgb4_tc_port_matchall {
 	struct cxgb4_matchall_egress_entry egress; /* Egress offload info */
+	struct cxgb4_matchall_ingress_entry ingress; /* Ingress offload info */
 };
 
 struct cxgb4_tc_matchall {
@@ -26,9 +36,13 @@ struct cxgb4_tc_matchall {
 };
 
 int cxgb4_tc_matchall_replace(struct net_device *dev,
-			      struct tc_cls_matchall_offload *cls_matchall);
+			      struct tc_cls_matchall_offload *cls_matchall,
+			      bool ingress);
 int cxgb4_tc_matchall_destroy(struct net_device *dev,
-			      struct tc_cls_matchall_offload *cls_matchall);
+			      struct tc_cls_matchall_offload *cls_matchall,
+			      bool ingress);
+int cxgb4_tc_matchall_stats(struct net_device *dev,
+			    struct tc_cls_matchall_offload *cls_matchall);
 
 int cxgb4_init_tc_matchall(struct adapter *adap);
 void cxgb4_cleanup_tc_matchall(struct adapter *adap);