Re: [PATCH net-next 7/8] net/mlx5e: Support offload cls_flower with drop action

Parse tc_cls_flower_offload into device specific commands and program
the hardware to classify and act accordingly.

For example, to drop ICMP (ip_proto 1) packets from specific smac, dmac,
src_ip, src_ip, arriving to interface ens9:

# tc qdisc add dev ens9 ingress

# tc filter add dev ens9 protocol ip parent ffff: \
    flower ip_proto 1 \
    dst_mac 7c:fe:90:69:81:62 src_mac 7c:fe:90:69:81:56 \
    dst_ip 11.11.11.11 src_ip 11.11.11.12 indev ens9 \
    action drop

Signed-off-by: Amir Vadai <redacted>
Signed-off-by: Or Gerlitz <redacted>
---
drivers/net/ethernet/mellanox/mlx5/core/en_main.c |   9 +
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c   | 287 ++++++++++++++++++++++
drivers/net/ethernet/mellanox/mlx5/core/en_tc.h   |   5 +
3 files changed, 301 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index cb02b4c..1d1da94 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -1889,6 +1889,15 @@ static int mlx5e_ndo_setup_tc(struct net_device *dev, u32 handle,

		goto mqprio;

	switch (tc->type) {
+	case TC_SETUP_CLSFLOWER:
+		switch (tc->cls_flower->command) {
+		case TC_CLSFLOWER_REPLACE:
+			return mlx5e_configure_flower(priv, proto, tc->cls_flower);
+		case TC_CLSFLOWER_DESTROY:
+			return mlx5e_delete_flower(priv, tc->cls_flower);
+		default:
+			return -EINVAL;