ice: Support IPv4 Flow Director filters

Support the addition and deletion of IPv4 filters.

Supported fields are: src-ip, dst-ip, src-port, and dst-port
Supported flow-types are: tcp4, udp4, sctp4, ip4

Example usage:

ethtool -N eth0 flow-type tcp4 src-ip 192.168.0.55 dst-ip 172.16.0.55 \
src-port 16 dst-port 12 action 32

Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
index fe2f04f706e7..16d2f599bd70 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
@@ -1633,6 +1633,34 @@ ice_find_free_tunnel_entry(struct ice_hw *hw, enum ice_tunnel_type type,
 }
 
 /**
+ * ice_get_open_tunnel_port - retrieve an open tunnel port
+ * @hw: pointer to the HW structure
+ * @type: tunnel type (TNL_ALL will return any open port)
+ * @port: returns open port
+ */
+bool
+ice_get_open_tunnel_port(struct ice_hw *hw, enum ice_tunnel_type type,
+			 u16 *port)
+{
+	bool res = false;
+	u16 i;
+
+	mutex_lock(&hw->tnl_lock);
+
+	for (i = 0; i < hw->tnl.count && i < ICE_TUNNEL_MAX_ENTRIES; i++)
+		if (hw->tnl.tbl[i].valid && hw->tnl.tbl[i].in_use &&
+		    (type == TNL_ALL || hw->tnl.tbl[i].type == type)) {
+			*port = hw->tnl.tbl[i].port;
+			res = true;
+			break;
+		}
+
+	mutex_unlock(&hw->tnl_lock);
+
+	return res;
+}
+
+/**
  * ice_create_tunnel
  * @hw: pointer to the HW structure
  * @type: type of tunnel
@@ -2332,6 +2360,12 @@ ice_find_prof_id(struct ice_hw *hw, enum ice_block blk,
 	u16 off;
 	u8 i;
 
+	/* For FD, we don't want to re-use a existed profile with the same
+	 * field vector and mask. This will cause rule interference.
+	 */
+	if (blk == ICE_BLK_FD)
+		return ICE_ERR_DOES_NOT_EXIST;
+
 	for (i = 0; i < (u8)es->count; i++) {
 		off = i * es->fvw;