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net/mlx5: E-Switch, Add API to create send-to-vport rules

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Add the API to create send-to-vport e-switch rules of the form

 packet meta-data :: send-queue-number == $SQN and source-vport == 0 --> $VPORT

These rules are to be used for a send-to-vport logic which conceptually bypasses
the "normal" steering rules currently present at the e-switch datapath.

Such rule should apply only for packets that originate in the e-switch manager
vport (0) and are sent for a given SQN which is used by a given VF representor
device, and hence the matching logic.

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 14:50:57 +03:00 committed by David S. Miller
parent 3aa335724f
commit ab22be9ba3
2 changed files with 41 additions and 1 deletions
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3
drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
View File

@ -193,6 +193,8 @@ int mlx5_eswitch_get_vport_config(struct mlx5_eswitch *esw,
int mlx5_eswitch_get_vport_stats(struct mlx5_eswitch *esw,
int vport,
struct ifla_vf_stats *vf_stats);
struct mlx5_flow_rule *
mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *esw, int vport, u32 sqn);
#define MLX5_DEBUG_ESWITCH_MASK BIT(3)
@ -204,5 +206,4 @@ int mlx5_eswitch_get_vport_stats(struct mlx5_eswitch *esw,
#define esw_debug(dev, format, ...) \
mlx5_core_dbg_mask(dev, MLX5_DEBUG_ESWITCH_MASK, format, ##__VA_ARGS__)
#endif /* __MLX5_ESWITCH_H__ */

39
drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
View File

@ -38,6 +38,45 @@
#include "mlx5_core.h"
#include "eswitch.h"
struct mlx5_flow_rule *
mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *esw, int vport, u32 sqn)
{
struct mlx5_flow_destination dest;
struct mlx5_flow_rule *flow_rule;
int match_header = MLX5_MATCH_MISC_PARAMETERS;
u32 *match_v, *match_c;
void *misc;
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");
flow_rule = ERR_PTR(-ENOMEM);
goto out;
}
misc = MLX5_ADDR_OF(fte_match_param, match_v, misc_parameters);
MLX5_SET(fte_match_set_misc, misc, source_sqn, sqn);
MLX5_SET(fte_match_set_misc, misc, source_port, 0x0); /* source vport is 0 */
misc = MLX5_ADDR_OF(fte_match_param, match_c, misc_parameters);
MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_sqn);
MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_port);
dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
dest.vport_num = vport;
flow_rule = mlx5_add_flow_rule(esw->fdb_table.fdb, match_header, match_c,
match_v, MLX5_FLOW_CONTEXT_ACTION_FWD_DEST,
0, &dest);
if (IS_ERR(flow_rule))
esw_warn(esw->dev, "FDB: Failed to add send to vport rule err %ld\n", PTR_ERR(flow_rule));
out:
kfree(match_v);
kfree(match_c);
return flow_rule;
}
static int esw_add_fdb_miss_rule(struct mlx5_eswitch *esw)
{
struct mlx5_flow_destination dest;