netdev - [PATCH net-next 13/14] mlxsw: spectrum_buffers: Allow skipping ingress port quota configuration

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Date:   Mon, 22 Apr 2019 12:08:55 +0000
From:   Ido Schimmel <idosch@...lanox.com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        Jiri Pirko <jiri@...lanox.com>,
        Petr Machata <petrm@...lanox.com>,
        Alex Kushnarov <alexanderk@...lanox.com>,
        mlxsw <mlxsw@...lanox.com>, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 13/14] mlxsw: spectrum_buffers: Allow skipping
 ingress port quota configuration

The CPU port is used to transmit traffic that is trapped to the host
CPU. It is therefore irrelevant to define ingress quota for it.

Add a 'skip_ingress' argument to the function tasked with configuring
per-port quotas, so that ingress quotas could be skipped in case the
passed local port is the CPU port.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Reviewed-by: Petr Machata <petrm@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
index e324fad8b100..32a74cc3d6e4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
@@ -730,15 +730,21 @@ static const struct mlxsw_sp_sb_pm mlxsw_sp2_sb_pms[] = {
 };
 
 static int mlxsw_sp_sb_pms_init(struct mlxsw_sp *mlxsw_sp, u8 local_port,
-				const struct mlxsw_sp_sb_pm *pms)
+				const struct mlxsw_sp_sb_pm *pms,
+				bool skip_ingress)
 {
 	int i, err;
 
 	for (i = 0; i < mlxsw_sp->sb_vals->pool_count; i++) {
 		const struct mlxsw_sp_sb_pm *pm = &pms[i];
+		const struct mlxsw_sp_sb_pool_des *des;
 		u32 max_buff;
 		u32 min_buff;
 
+		des = &mlxsw_sp->sb_vals->pool_dess[i];
+		if (skip_ingress && des->dir == MLXSW_REG_SBXX_DIR_INGRESS)
+			continue;
+
 		min_buff = mlxsw_sp_bytes_cells(mlxsw_sp, pm->min_buff);
 		max_buff = pm->max_buff;
 		if (mlxsw_sp_sb_pool_is_static(mlxsw_sp, i))
@@ -756,7 +762,7 @@ static int mlxsw_sp_port_sb_pms_init(struct mlxsw_sp_port *mlxsw_sp_port)
 	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 
 	return mlxsw_sp_sb_pms_init(mlxsw_sp, mlxsw_sp_port->local_port,
-				    mlxsw_sp->sb_vals->pms);
+				    mlxsw_sp->sb_vals->pms, false);
 }
 
 #define MLXSW_SP_SB_MM(_min_buff, _max_buff)		\
-- 
2.20.1