From: Or Gerlitz <ogerl...@mellanox.com>
Add the setup code that parses the TC actions needed to support offloading drop
and mirred/redirect for SRIOV e-switch. We can redirect between two devices if
they belong to the same HW switch, compare the switchdev HW ID attribute to
enforce that.
Signed-off-by: Or Gerlitz <ogerl...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 53 +++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 57b76f7..9a66441 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -37,8 +37,11 @@
#include <linux/mlx5/fs.h>
#include <linux/mlx5/device.h>
#include <linux/rhashtable.h>
+#include <net/switchdev.h>
+#include <net/tc_act/tc_mirred.h>
#include "en.h"
#include "en_tc.h"
+#include "eswitch.h"
struct mlx5e_tc_flow {
struct rhash_head node;
@@ -339,6 +342,56 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv,
struct tcf_exts *exts,
return 0;
}
+static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
+ u32 *action, u32 *dest_vport)
+{
+ const struct tc_action *a;
+
+ if (tc_no_actions(exts))
+ return -EINVAL;
+
+ *action = 0;
+
+ tc_for_each_action(a, exts) {
+ /* Only support a single action per rule */
+ if (*action)
+ return -EINVAL;
+
+ if (is_tcf_gact_shot(a)) {
+ *action = MLX5_FLOW_CONTEXT_ACTION_DROP |
+ MLX5_FLOW_CONTEXT_ACTION_COUNT;
+ continue;
+ }
+
+ if (is_tcf_mirred_redirect(a)) {
+ int ifindex = tcf_mirred_ifindex(a);
+ struct net_device *out_dev;
+ struct mlx5e_priv *out_priv;
+ struct mlx5_eswitch_rep *out_rep;
+
+ out_dev = __dev_get_by_index(dev_net(priv->netdev),
ifindex);
+
+ if (!switchdev_port_same_parent_id(priv->netdev,
out_dev)) {
+ pr_err("devices %s %s not on same switch HW,
can't offload forwarding\n",
+ priv->netdev->name, out_dev->name);
+ return -EINVAL;
+ }
+
+ out_priv = netdev_priv(out_dev);
+ out_rep = out_priv->ppriv;
+ if (out_rep->vport == 0)
+ *dest_vport = FDB_UPLINK_VPORT;
+ else
+ *dest_vport = out_rep->vport;
+ *action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
+ continue;
+ }
+
+ return -EINVAL;
+ }
+ return 0;
+}
+
int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
struct tc_cls_flower_offload *f)
{
--
2.8.0
