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Date: Fri, 10 Jul 2020 16:56:59 +0300
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, jiri@...lanox.com,
petrm@...lanox.com, mlxsw@...lanox.com, michael.chan@...adcom.com,
saeedm@...lanox.com, leon@...nel.org, pablo@...filter.org,
kadlec@...filter.org, fw@...len.de, jhs@...atatu.com,
xiyou.wangcong@...il.com, simon.horman@...ronome.com,
Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 06/13] mlxsw: spectrum_span: Add support for global mirroring triggers
From: Ido Schimmel <idosch@...lanox.com>
Global mirroring triggers are triggers that are only keyed by their
trigger, as opposed to per-port triggers, which are keyed by their
trigger and port.
Such triggers allow mirroring packets that were tail/early dropped or
ECN marked to a SPAN agent.
Implement the previously added trigger operations for these global
triggers. Since such triggers are only supported from Spectrum-2
onwards, have the Spectrum-1 operations return an error.
Reviewed-by: Petr Machata <petrm@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Petr Machata <petrm@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
.../ethernet/mellanox/mlxsw/spectrum_span.c | 104 +++++++++++++++++-
.../ethernet/mellanox/mlxsw/spectrum_span.h | 3 +
2 files changed, 104 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index b20422dde147..fa223c1351b4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -49,6 +49,7 @@ struct mlxsw_sp_span_trigger_entry {
enum mlxsw_sp_span_trigger_type {
MLXSW_SP_SPAN_TRIGGER_TYPE_PORT,
+ MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL,
};
struct mlxsw_sp_span_trigger_ops {
@@ -1140,9 +1141,101 @@ mlxsw_sp_span_trigger_port_ops = {
.matches = mlxsw_sp_span_trigger_port_matches,
};
+static int
+mlxsw_sp1_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
+ trigger_entry)
+{
+ return -EOPNOTSUPP;
+}
+
+static void
+mlxsw_sp1_span_trigger_global_unbind(struct mlxsw_sp_span_trigger_entry *
+ trigger_entry)
+{
+}
+
+static bool
+mlxsw_sp1_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
+ trigger_entry,
+ enum mlxsw_sp_span_trigger trigger,
+ struct mlxsw_sp_port *mlxsw_sp_port)
+{
+ WARN_ON_ONCE(1);
+ return false;
+}
+
+static const struct mlxsw_sp_span_trigger_ops
+mlxsw_sp1_span_trigger_global_ops = {
+ .bind = mlxsw_sp1_span_trigger_global_bind,
+ .unbind = mlxsw_sp1_span_trigger_global_unbind,
+ .matches = mlxsw_sp1_span_trigger_global_matches,
+};
+
+static const struct mlxsw_sp_span_trigger_ops *
+mlxsw_sp1_span_trigger_ops_arr[] = {
+ [MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
+ [MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL] =
+ &mlxsw_sp1_span_trigger_global_ops,
+};
+
+static int
+mlxsw_sp2_span_trigger_global_bind(struct mlxsw_sp_span_trigger_entry *
+ trigger_entry)
+{
+ struct mlxsw_sp *mlxsw_sp = trigger_entry->span->mlxsw_sp;
+ enum mlxsw_reg_mpagr_trigger trigger;
+ char mpagr_pl[MLXSW_REG_MPAGR_LEN];
+
+ switch (trigger_entry->trigger) {
+ case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
+ trigger = MLXSW_REG_MPAGR_TRIGGER_INGRESS_SHARED_BUFFER;
+ break;
+ case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
+ trigger = MLXSW_REG_MPAGR_TRIGGER_INGRESS_WRED;
+ break;
+ case MLXSW_SP_SPAN_TRIGGER_ECN:
+ trigger = MLXSW_REG_MPAGR_TRIGGER_EGRESS_ECN;
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return -EINVAL;
+ }
+
+ mlxsw_reg_mpagr_pack(mpagr_pl, trigger, trigger_entry->parms.span_id,
+ 1);
+ return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpagr), mpagr_pl);
+}
+
+static void
+mlxsw_sp2_span_trigger_global_unbind(struct mlxsw_sp_span_trigger_entry *
+ trigger_entry)
+{
+ /* There is no unbinding for global triggers. The trigger should be
+ * disabled on all ports by now.
+ */
+}
+
+static bool
+mlxsw_sp2_span_trigger_global_matches(struct mlxsw_sp_span_trigger_entry *
+ trigger_entry,
+ enum mlxsw_sp_span_trigger trigger,
+ struct mlxsw_sp_port *mlxsw_sp_port)
+{
+ return trigger_entry->trigger == trigger;
+}
+
+static const struct mlxsw_sp_span_trigger_ops
+mlxsw_sp2_span_trigger_global_ops = {
+ .bind = mlxsw_sp2_span_trigger_global_bind,
+ .unbind = mlxsw_sp2_span_trigger_global_unbind,
+ .matches = mlxsw_sp2_span_trigger_global_matches,
+};
+
static const struct mlxsw_sp_span_trigger_ops *
-mlxsw_sp_span_trigger_ops_arr[] = {
+mlxsw_sp2_span_trigger_ops_arr[] = {
[MLXSW_SP_SPAN_TRIGGER_TYPE_PORT] = &mlxsw_sp_span_trigger_port_ops,
+ [MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL] =
+ &mlxsw_sp2_span_trigger_global_ops,
};
static void
@@ -1156,6 +1249,11 @@ mlxsw_sp_span_trigger_ops_set(struct mlxsw_sp_span_trigger_entry *trigger_entry)
case MLXSW_SP_SPAN_TRIGGER_EGRESS:
type = MLXSW_SP_SPAN_TRIGGER_TYPE_PORT;
break;
+ case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP: /* fall-through */
+ case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP: /* fall-through */
+ case MLXSW_SP_SPAN_TRIGGER_ECN:
+ type = MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL;
+ break;
default:
WARN_ON_ONCE(1);
return;
@@ -1286,7 +1384,7 @@ void mlxsw_sp_span_agent_unbind(struct mlxsw_sp *mlxsw_sp,
static int mlxsw_sp1_span_init(struct mlxsw_sp *mlxsw_sp)
{
- mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp_span_trigger_ops_arr;
+ mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp1_span_trigger_ops_arr;
return 0;
}
@@ -1303,7 +1401,7 @@ const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
static int mlxsw_sp2_span_init(struct mlxsw_sp *mlxsw_sp)
{
- mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp_span_trigger_ops_arr;
+ mlxsw_sp->span->span_trigger_ops_arr = mlxsw_sp2_span_trigger_ops_arr;
return 0;
}
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index b9acecaf6ee2..bb7939b3f09c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -26,6 +26,9 @@ struct mlxsw_sp_span_parms {
enum mlxsw_sp_span_trigger {
MLXSW_SP_SPAN_TRIGGER_INGRESS,
MLXSW_SP_SPAN_TRIGGER_EGRESS,
+ MLXSW_SP_SPAN_TRIGGER_TAIL_DROP,
+ MLXSW_SP_SPAN_TRIGGER_EARLY_DROP,
+ MLXSW_SP_SPAN_TRIGGER_ECN,
};
struct mlxsw_sp_span_trigger_parms {
--
2.26.2
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