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net/mlx5: E-Switch, Add miss rule for offloads mode 

In the sriov offloads mode, packets that are not matched by any other
rule should be sent towards the e-switch manager for further processing.

Add such "miss" rule which matches ANY packet as the last rule in the
e-switch FDB and programs the HW to send the packet to vport 0 where
the e-switch manager runs.

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 2016-07-01 14:50:56 +03:00 committed by David S. Miller
parent 69697b6e20
commit 3aa335724f
2 changed files with 41 additions and 0 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
View File

@ -144,6 +144,7 @@ struct mlx5_eswitch_fdb {
struct offloads_fdb {
struct mlx5_flow_group *send_to_vport_grp;
struct mlx5_flow_group *miss_grp;
struct mlx5_flow_rule *miss_rule;
} offloads;
};
};

40
drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
View File

@ -38,6 +38,39 @@
#include "mlx5_core.h"
#include "eswitch.h"
static int esw_add_fdb_miss_rule(struct mlx5_eswitch *esw)
{
struct mlx5_flow_destination dest;
struct mlx5_flow_rule *flow_rule = NULL;
u32 *match_v, *match_c;
int err = 0;
match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
if (!match_v || !match_c) {
esw_warn(esw->dev, "FDB: Failed to alloc match parameters\n");
err = -ENOMEM;
goto out;
}
dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
dest.vport_num = 0;
flow_rule = mlx5_add_flow_rule(esw->fdb_table.fdb, 0, match_c, match_v,
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST, 0, &dest);
if (IS_ERR(flow_rule)) {
err = PTR_ERR(flow_rule);
esw_warn(esw->dev, "FDB: Failed to add miss flow rule err %d\n", err);
goto out;
}
esw->fdb_table.offloads.miss_rule = flow_rule;
out:
kfree(match_v);
kfree(match_c);
return err;
}
#define MAX_PF_SQ 256
int esw_create_offloads_fdb_table(struct mlx5_eswitch *esw, int nvports)
@ -110,8 +143,14 @@ int esw_create_offloads_fdb_table(struct mlx5_eswitch *esw, int nvports)
}
esw->fdb_table.offloads.miss_grp = g;
err = esw_add_fdb_miss_rule(esw);
if (err)
goto miss_rule_err;
return 0;
miss_rule_err:
mlx5_destroy_flow_group(esw->fdb_table.offloads.miss_grp);
miss_err:
mlx5_destroy_flow_group(esw->fdb_table.offloads.send_to_vport_grp);
send_vport_err:
@ -128,6 +167,7 @@ void esw_destroy_offloads_fdb_table(struct mlx5_eswitch *esw)
return;
esw_debug(esw->dev, "Destroy offloads FDB Table\n");
mlx5_del_flow_rule(esw->fdb_table.offloads.miss_rule);
mlx5_destroy_flow_group(esw->fdb_table.offloads.send_to_vport_grp);
mlx5_destroy_flow_group(esw->fdb_table.offloads.miss_grp);