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authorIdo Schimmel <idosch@nvidia.com>2021-03-11 14:24:13 +0200
committerDavid S. Miller <davem@davemloft.net>2021-03-11 16:22:39 -0800
commit2dcbd9207b3380c0efd89b2805dfc4e867470eb9 (patch)
tree038e13975ab9961310c269585b8cf334c1324e74
parentfa3faeb7aedbfbd7e30eb25a25058a2cce1010fb (diff)
mlxsw: spectrum_span: Add SPAN probability rate support
Currently, every packet that matches a mirroring trigger (e.g., received packets, buffer dropped packets) is mirrored. Spectrum-2 and later ASICs support mirroring with probability, where every 1 in N matched packets is mirrored. Extend the API that creates the binding between the trigger and the SPAN agent with a probability rate parameter, which is an attribute of the trigger. Set it to '1' to maintain existing behavior. Subsequent patches will use it to perform more sophisticated sampling, by mirroring packets to the CPU with probability. Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c1
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c1
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c15
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h1
4 files changed, 15 insertions, 3 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
index f30599ad6019..2b7652b4b0bb 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -51,6 +51,7 @@ mlxsw_sp_mall_port_mirror_add(struct mlxsw_sp_port *mlxsw_sp_port,
trigger = mall_entry->ingress ? MLXSW_SP_SPAN_TRIGGER_INGRESS :
MLXSW_SP_SPAN_TRIGGER_EGRESS;
parms.span_id = mall_entry->mirror.span_id;
+ parms.probability_rate = 1;
err = mlxsw_sp_span_agent_bind(mlxsw_sp, trigger, mlxsw_sp_port,
&parms);
if (err)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
index 9d16823320ae..baf17c0b2702 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
@@ -1341,6 +1341,7 @@ static int mlxsw_sp_qevent_span_configure(struct mlxsw_sp *mlxsw_sp,
goto err_analyzed_port_get;
trigger_parms.span_id = span_id;
+ trigger_parms.probability_rate = 1;
err = mlxsw_sp_span_agent_bind(mlxsw_sp, qevent_binding->span_trigger, mlxsw_sp_port,
&trigger_parms);
if (err)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 7711ace07ec8..3398cc01e5ec 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -1231,8 +1231,12 @@ __mlxsw_sp_span_trigger_port_bind(struct mlxsw_sp_span *span,
return -EINVAL;
}
+ if (trigger_entry->parms.probability_rate > MLXSW_REG_MPAR_RATE_MAX)
+ return -EINVAL;
+
mlxsw_reg_mpar_pack(mpar_pl, trigger_entry->local_port, i_e, enable,
- trigger_entry->parms.span_id, 1);
+ trigger_entry->parms.span_id,
+ trigger_entry->parms.probability_rate);
return mlxsw_reg_write(span->mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
}
@@ -1366,8 +1370,11 @@ mlxsw_sp2_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
return -EINVAL;
}
+ if (trigger_entry->parms.probability_rate > MLXSW_REG_MPAGR_RATE_MAX)
+ return -EINVAL;
+
mlxsw_reg_mpagr_pack(mpagr_pl, trigger, trigger_entry->parms.span_id,
- 1);
+ trigger_entry->parms.probability_rate);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpagr), mpagr_pl);
}
@@ -1565,7 +1572,9 @@ int mlxsw_sp_span_agent_bind(struct mlxsw_sp *mlxsw_sp,
trigger,
mlxsw_sp_port);
if (trigger_entry) {
- if (trigger_entry->parms.span_id != parms->span_id)
+ if (trigger_entry->parms.span_id != parms->span_id ||
+ trigger_entry->parms.probability_rate !=
+ parms->probability_rate)
return -EINVAL;
refcount_inc(&trigger_entry->ref_count);
goto out;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index 6e84cc049428..dea1c0d31310 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -48,6 +48,7 @@ enum mlxsw_sp_span_trigger {
struct mlxsw_sp_span_trigger_parms {
int span_id;
+ u32 probability_rate;
};
struct mlxsw_sp_span_agent_parms {