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net/mlx5e: Add TC drop and mirred/redirect action parsing for SRIOV offloads 

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 <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2016-07-14 10:32:44 +03:00 committed by David S. Miller
parent 8438884d4a
commit 03a9d11e6e
1 changed files with 53 additions and 0 deletions
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53
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -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)
{