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net/mlx5e: Support offloading tc priorities and chains for eswitch flows

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Currently we fail when user specify a non-zero chain, this patch adds the
support for it and tc priorities. To get to a new chain, use the tc
goto action.

Currently we support a fixed prio range 1-16, and chain range 0-3.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Paul Blakey 2018-09-02 10:19:14 +03:00 committed by Saeed Mahameed
parent 5dbe906ff1
commit bf07aa730a
4 changed files with 50 additions and 12 deletions
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3
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -3392,9 +3392,6 @@ static int mlx5e_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
{
struct mlx5e_priv *priv = cb_priv;
if (!tc_cls_can_offload_and_chain0(priv->netdev, type_data))
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_CLSFLOWER:
return mlx5e_setup_tc_cls_flower(priv, type_data, MLX5E_TC_INGRESS);

6
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
View File

@ -853,9 +853,6 @@ static int mlx5e_rep_setup_tc_cb_egdev(enum tc_setup_type type, void *type_data,
{
struct mlx5e_priv *priv = cb_priv;
if (!tc_cls_can_offload_and_chain0(priv->netdev, type_data))
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_CLSFLOWER:
return mlx5e_rep_setup_tc_cls_flower(priv, type_data, MLX5E_TC_EGRESS);
@ -869,9 +866,6 @@ static int mlx5e_rep_setup_tc_cb(enum tc_setup_type type, void *type_data,
{
struct mlx5e_priv *priv = cb_priv;
if (!tc_cls_can_offload_and_chain0(priv->netdev, type_data))
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_CLSFLOWER:
return mlx5e_rep_setup_tc_cls_flower(priv, type_data, MLX5E_TC_INGRESS);

51
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
View File

@ -898,15 +898,32 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
struct netlink_ext_ack *extack)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
u32 max_chain = mlx5_eswitch_get_chain_range(esw);
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
u16 max_prio = mlx5_eswitch_get_prio_range(esw);
struct net_device *out_dev, *encap_dev = NULL;
struct mlx5_fc *counter = NULL;
struct mlx5e_rep_priv *rpriv;
struct mlx5e_priv *out_priv;
int err = 0, encap_err = 0;
/* keep the old behaviour, use same prio for all offloaded rules */
attr->prio = 1;
/* if prios are not supported, keep the old behaviour of using same prio
* for all offloaded rules.
*/
if (!mlx5_eswitch_prios_supported(esw))
attr->prio = 1;
if (attr->chain > max_chain) {
NL_SET_ERR_MSG(extack, "Requested chain is out of supported range");
err = -EOPNOTSUPP;
goto err_max_prio_chain;
}
if (attr->prio > max_prio) {
NL_SET_ERR_MSG(extack, "Requested priority is out of supported range");
err = -EOPNOTSUPP;
goto err_max_prio_chain;
}
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT) {
out_dev = __dev_get_by_index(dev_net(priv->netdev),
@ -975,6 +992,7 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
if (attr->action & MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT)
mlx5e_detach_encap(priv, flow);
err_attach_encap:
err_max_prio_chain:
return err;
}
@ -2826,6 +2844,7 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
struct mlx5e_tc_flow *flow,
struct netlink_ext_ack *extack)
{
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
struct mlx5e_rep_priv *rpriv = priv->ppriv;
struct ip_tunnel_info *info = NULL;
@ -2934,6 +2953,25 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
continue;
}
if (is_tcf_gact_goto_chain(a)) {
u32 dest_chain = tcf_gact_goto_chain_index(a);
u32 max_chain = mlx5_eswitch_get_chain_range(esw);
if (dest_chain <= attr->chain) {
NL_SET_ERR_MSG(extack, "Goto earlier chain isn't supported");
return -EOPNOTSUPP;
}
if (dest_chain > max_chain) {
NL_SET_ERR_MSG(extack, "Requested destination chain is out of supported range");
return -EOPNOTSUPP;
}
action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
MLX5_FLOW_CONTEXT_ACTION_COUNT;
attr->dest_chain = dest_chain;
continue;
}
return -EINVAL;
}
@ -3036,6 +3074,8 @@ mlx5e_add_fdb_flow(struct mlx5e_priv *priv,
if (err)
goto out;
flow->esw_attr->chain = f->common.chain_index;
flow->esw_attr->prio = TC_H_MAJ(f->common.prio) >> 16;
err = parse_tc_fdb_actions(priv, f->exts, parse_attr, flow, extack);
if (err)
goto err_free;
@ -3070,6 +3110,10 @@ mlx5e_add_nic_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow;
int attr_size, err;
/* multi-chain not supported for NIC rules */
if (!tc_cls_can_offload_and_chain0(priv->netdev, &f->common))
return -EOPNOTSUPP;
flow_flags |= MLX5E_TC_FLOW_NIC;
attr_size = sizeof(struct mlx5_nic_flow_attr);
err = mlx5e_alloc_flow(priv, attr_size, f, flow_flags,
@ -3110,6 +3154,9 @@ mlx5e_tc_add_flow(struct mlx5e_priv *priv,
get_flags(flags, &flow_flags);
if (!tc_can_offload_extack(priv->netdev, f->common.extack))
return -EOPNOTSUPP;
if (esw && esw->mode == SRIOV_OFFLOADS)
err = mlx5e_add_fdb_flow(priv, f, flow_flags, flow);
else

2
drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
View File

@ -71,7 +71,7 @@ u16 mlx5_eswitch_get_prio_range(struct mlx5_eswitch *esw)
if (esw->fdb_table.flags & ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED)
return FDB_MAX_PRIO;
return U16_MAX;
return 1;
}
struct mlx5_flow_handle *