iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net/mlx5: E-Switch, Enable reg c1 loopback when possible

Browse Source 
Enable reg c1 loopback if firmware reports it's supported,
as this is needed for restoring packet metadata (e.g chain).

Also define helper to query if it is enabled.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Blakey 2020-03-12 12:23:03 +02:00 committed by David S. Miller
parent bf3347c4d1
commit 5b7cb74515
3 changed files with 41 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
View File

@ -236,6 +236,7 @@ struct mlx5_esw_functions {
enum {
MLX5_ESWITCH_VPORT_MATCH_METADATA = BIT(0),
MLX5_ESWITCH_REG_C1_LOOPBACK_ENABLED = BIT(1),
};
struct mlx5_eswitch {

44
drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
View File

@ -763,14 +763,21 @@ void mlx5_eswitch_del_send_to_vport_rule(struct mlx5_flow_handle *rule)
mlx5_del_flow_rules(rule);
}
static bool mlx5_eswitch_reg_c1_loopback_supported(struct mlx5_eswitch *esw)
{
return MLX5_CAP_ESW_FLOWTABLE(esw->dev, fdb_to_vport_reg_c_id) &
MLX5_FDB_TO_VPORT_REG_C_1;
}
static int esw_set_passing_vport_metadata(struct mlx5_eswitch *esw, bool enable)
{
u32 out[MLX5_ST_SZ_DW(query_esw_vport_context_out)] = {};
u32 in[MLX5_ST_SZ_DW(modify_esw_vport_context_in)] = {};
u8 fdb_to_vport_reg_c_id;
u8 curr, wanted;
int err;
if (!mlx5_eswitch_vport_match_metadata_enabled(esw))
if (!mlx5_eswitch_reg_c1_loopback_supported(esw) &&
!mlx5_eswitch_vport_match_metadata_enabled(esw))
return 0;
err = mlx5_eswitch_query_esw_vport_context(esw->dev, 0, false,
@ -778,24 +785,33 @@ static int esw_set_passing_vport_metadata(struct mlx5_eswitch *esw, bool enable)
if (err)
return err;
fdb_to_vport_reg_c_id = MLX5_GET(query_esw_vport_context_out, out,
esw_vport_context.fdb_to_vport_reg_c_id);
curr = MLX5_GET(query_esw_vport_context_out, out,
esw_vport_context.fdb_to_vport_reg_c_id);
wanted = MLX5_FDB_TO_VPORT_REG_C_0;
if (mlx5_eswitch_reg_c1_loopback_supported(esw))
wanted |= MLX5_FDB_TO_VPORT_REG_C_1;
if (enable)
fdb_to_vport_reg_c_id |= MLX5_FDB_TO_VPORT_REG_C_0 |
MLX5_FDB_TO_VPORT_REG_C_1;
curr |= wanted;
else
fdb_to_vport_reg_c_id &= ~(MLX5_FDB_TO_VPORT_REG_C_0 |
MLX5_FDB_TO_VPORT_REG_C_1);
curr &= ~wanted;
MLX5_SET(modify_esw_vport_context_in, in,
esw_vport_context.fdb_to_vport_reg_c_id, fdb_to_vport_reg_c_id);
esw_vport_context.fdb_to_vport_reg_c_id, curr);
MLX5_SET(modify_esw_vport_context_in, in,
field_select.fdb_to_vport_reg_c_id, 1);
return mlx5_eswitch_modify_esw_vport_context(esw->dev, 0, false,
in, sizeof(in));
err = mlx5_eswitch_modify_esw_vport_context(esw->dev, 0, false, in,
sizeof(in));
if (!err) {
if (enable && (curr & MLX5_FDB_TO_VPORT_REG_C_1))
esw->flags |= MLX5_ESWITCH_REG_C1_LOOPBACK_ENABLED;
else
esw->flags &= ~MLX5_ESWITCH_REG_C1_LOOPBACK_ENABLED;
}
return err;
}
static void peer_miss_rules_setup(struct mlx5_eswitch *esw,
@ -2831,6 +2847,12 @@ bool mlx5_eswitch_is_vf_vport(const struct mlx5_eswitch *esw, u16 vport_num)
vport_num <= esw->dev->priv.sriov.max_vfs;
}
bool mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw)
{
return !!(esw->flags & MLX5_ESWITCH_REG_C1_LOOPBACK_ENABLED);
}
EXPORT_SYMBOL(mlx5_eswitch_reg_c1_loopback_enabled);
bool mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw)
{
return !!(esw->flags & MLX5_ESWITCH_VPORT_MATCH_METADATA);

7
include/linux/mlx5/eswitch.h
View File

@ -70,6 +70,7 @@ u16 mlx5_eswitch_get_total_vports(const struct mlx5_core_dev *dev);
enum devlink_eswitch_encap_mode
mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev *dev);
bool mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw);
bool mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw);
/* Reg C0 usage:
@ -108,6 +109,12 @@ mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev *dev)
return DEVLINK_ESWITCH_ENCAP_MODE_NONE;
}
static inline bool
mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw)
{
return false;
};
static inline bool
mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw)
{