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Date: Thu, 17 Oct 2019 09:55:14 +0300
From: Ido Schimmel <idosch@...sch.org>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, jiri@...lanox.com, danieller@...lanox.com,
mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 1/5] mlxsw: spectrum: Register switched port analyzers (SPAN) as resource
From: Danielle Ratson <danieller@...lanox.com>
The switch supports an enhanced switched port analyzer that enables
selecting network traffic for analysis by a network analyzer.
SPAN agents are configured and consumed whenever a tc filter is added
with a mirror action to a new destination. The destination can either be
a physical port (e.g., swp1), a VLAN device or a gretap.
Expose the maximum number of SPAN agents and their current usage to the
user.
Signed-off-by: Danielle Ratson <danieller@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
.../net/ethernet/mellanox/mlxsw/spectrum.c | 51 ++++++++++++++++++-
.../net/ethernet/mellanox/mlxsw/spectrum.h | 3 ++
.../ethernet/mellanox/mlxsw/spectrum_span.c | 21 ++++++++
3 files changed, 73 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index ae3c4da11520..1275d21e8fbd 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -5202,14 +5202,61 @@ static int mlxsw_sp2_resources_kvd_register(struct mlxsw_core *mlxsw_core)
&kvd_size_params);
}
+static int mlxsw_sp_resources_span_register(struct mlxsw_core *mlxsw_core)
+{
+ struct devlink *devlink = priv_to_devlink(mlxsw_core);
+ struct devlink_resource_size_params span_size_params;
+ u32 max_span;
+
+ if (!MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SPAN))
+ return -EIO;
+
+ max_span = MLXSW_CORE_RES_GET(mlxsw_core, MAX_SPAN);
+ devlink_resource_size_params_init(&span_size_params, max_span, max_span,
+ 1, DEVLINK_RESOURCE_UNIT_ENTRY);
+
+ return devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_SPAN,
+ max_span, MLXSW_SP_RESOURCE_SPAN,
+ DEVLINK_RESOURCE_ID_PARENT_TOP,
+ &span_size_params);
+}
+
static int mlxsw_sp1_resources_register(struct mlxsw_core *mlxsw_core)
{
- return mlxsw_sp1_resources_kvd_register(mlxsw_core);
+ int err;
+
+ err = mlxsw_sp1_resources_kvd_register(mlxsw_core);
+ if (err)
+ return err;
+
+ err = mlxsw_sp_resources_span_register(mlxsw_core);
+ if (err)
+ goto err_resources_span_register;
+
+ return 0;
+
+err_resources_span_register:
+ devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
+ return err;
}
static int mlxsw_sp2_resources_register(struct mlxsw_core *mlxsw_core)
{
- return mlxsw_sp2_resources_kvd_register(mlxsw_core);
+ int err;
+
+ err = mlxsw_sp2_resources_kvd_register(mlxsw_core);
+ if (err)
+ return err;
+
+ err = mlxsw_sp_resources_span_register(mlxsw_core);
+ if (err)
+ goto err_resources_span_register;
+
+ return 0;
+
+err_resources_span_register:
+ devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
+ return err;
}
static int mlxsw_sp_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 8f99d70d6b8b..a5fdd84b4ca7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -48,6 +48,8 @@
#define MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS "chunks"
#define MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS "large_chunks"
+#define MLXSW_SP_RESOURCE_NAME_SPAN "span_agents"
+
enum mlxsw_sp_resource_id {
MLXSW_SP_RESOURCE_KVD = 1,
MLXSW_SP_RESOURCE_KVD_LINEAR,
@@ -56,6 +58,7 @@ enum mlxsw_sp_resource_id {
MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE,
MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
+ MLXSW_SP_RESOURCE_SPAN,
};
struct mlxsw_sp_port;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 560a60e522f9..200d324e6d99 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -14,8 +14,23 @@
#include "spectrum_span.h"
#include "spectrum_switchdev.h"
+static u64 mlxsw_sp_span_occ_get(void *priv)
+{
+ const struct mlxsw_sp *mlxsw_sp = priv;
+ u64 occ = 0;
+ int i;
+
+ for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
+ if (mlxsw_sp->span.entries[i].ref_count)
+ occ++;
+ }
+
+ return occ;
+}
+
int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp)
{
+ struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
int i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_SPAN))
@@ -36,13 +51,19 @@ int mlxsw_sp_span_init(struct mlxsw_sp *mlxsw_sp)
curr->id = i;
}
+ devlink_resource_occ_get_register(devlink, MLXSW_SP_RESOURCE_SPAN,
+ mlxsw_sp_span_occ_get, mlxsw_sp);
+
return 0;
}
void mlxsw_sp_span_fini(struct mlxsw_sp *mlxsw_sp)
{
+ struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
int i;
+ devlink_resource_occ_get_unregister(devlink, MLXSW_SP_RESOURCE_SPAN);
+
for (i = 0; i < mlxsw_sp->span.entries_count; i++) {
struct mlxsw_sp_span_entry *curr = &mlxsw_sp->span.entries[i];
--
2.21.0
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