mlxsw: spectrum_buffers: Adjust CPU port shared buffer egress quotas

Switch the CPU port to use the new dedicated egress pool instead the
previously used egress pool which was shared with normal front panel
ports.

Add per-port quotas for the amount of traffic that can be buffered for
the CPU port and also adjust the per-{port, TC} quotas.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c

@@ -108,6 +108,7 @@ struct mlxsw_sp_sb_vals {
 	unsigned int pool_count;
 	const struct mlxsw_sp_sb_pool_des *pool_dess;
 	const struct mlxsw_sp_sb_pm *pms;
+	const struct mlxsw_sp_sb_pm *pms_cpu;
 	const struct mlxsw_sp_sb_pr *prs;
 	const struct mlxsw_sp_sb_mm *mms;
 	const struct mlxsw_sp_sb_cm *cms_ingress;
@@ -581,17 +582,17 @@ static const struct mlxsw_sp_sb_cm mlxsw_sp2_sb_cms_egress[] = {
 	MLXSW_SP_SB_CM_EGR(1, 0xff),
 };
 
-#define MLXSW_SP_CPU_PORT_SB_CM MLXSW_SP_SB_CM(0, 0, MLXSW_SP_SB_POOL_EGR)
+#define MLXSW_SP_CPU_PORT_SB_CM MLXSW_SP_SB_CM(0, 0, MLXSW_SP_SB_POOL_EGR_CPU)
 
 static const struct mlxsw_sp_sb_cm mlxsw_sp_cpu_port_sb_cms[] = {
 	MLXSW_SP_CPU_PORT_SB_CM,
-	MLXSW_SP_SB_CM(MLXSW_PORT_MAX_MTU, 0, MLXSW_SP_SB_POOL_EGR),
-	MLXSW_SP_SB_CM(MLXSW_PORT_MAX_MTU, 0, MLXSW_SP_SB_POOL_EGR),
-	MLXSW_SP_SB_CM(MLXSW_PORT_MAX_MTU, 0, MLXSW_SP_SB_POOL_EGR),
-	MLXSW_SP_SB_CM(MLXSW_PORT_MAX_MTU, 0, MLXSW_SP_SB_POOL_EGR),
-	MLXSW_SP_SB_CM(MLXSW_PORT_MAX_MTU, 0, MLXSW_SP_SB_POOL_EGR),
+	MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
+	MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
+	MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
+	MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
+	MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
 	MLXSW_SP_CPU_PORT_SB_CM,
-	MLXSW_SP_SB_CM(MLXSW_PORT_MAX_MTU, 0, MLXSW_SP_SB_POOL_EGR),
+	MLXSW_SP_SB_CM(1000, 8, MLXSW_SP_SB_POOL_EGR_CPU),
 	MLXSW_SP_CPU_PORT_SB_CM,
 	MLXSW_SP_CPU_PORT_SB_CM,
 	MLXSW_SP_CPU_PORT_SB_CM,
@@ -729,6 +730,21 @@ static const struct mlxsw_sp_sb_pm mlxsw_sp2_sb_pms[] = {
 	MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MIN),
 };
 
+/* Order according to mlxsw_sp*_sb_pool_dess */
+static const struct mlxsw_sp_sb_pm mlxsw_sp_cpu_port_sb_pms[] = {
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, 90000),
+	MLXSW_SP_SB_PM(0, 0),
+	MLXSW_SP_SB_PM(0, MLXSW_REG_SBXX_DYN_MAX_BUFF_MAX),
+};
+
 static int mlxsw_sp_sb_pms_init(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 				const struct mlxsw_sp_sb_pm *pms,
 				bool skip_ingress)
@@ -765,6 +781,12 @@ static int mlxsw_sp_port_sb_pms_init(struct mlxsw_sp_port *mlxsw_sp_port)
 				    mlxsw_sp->sb_vals->pms, false);
 }
 
+static int mlxsw_sp_cpu_port_sb_pms_init(struct mlxsw_sp *mlxsw_sp)
+{
+	return mlxsw_sp_sb_pms_init(mlxsw_sp, 0, mlxsw_sp->sb_vals->pms_cpu,
+				    true);
+}
+
 #define MLXSW_SP_SB_MM(_min_buff, _max_buff)		\
 	{						\
 		.min_buff = _min_buff,			\
@@ -836,6 +858,7 @@ const struct mlxsw_sp_sb_vals mlxsw_sp1_sb_vals = {
 	.pool_count = ARRAY_SIZE(mlxsw_sp1_sb_pool_dess),
 	.pool_dess = mlxsw_sp1_sb_pool_dess,
 	.pms = mlxsw_sp1_sb_pms,
+	.pms_cpu = mlxsw_sp_cpu_port_sb_pms,
 	.prs = mlxsw_sp1_sb_prs,
 	.mms = mlxsw_sp_sb_mms,
 	.cms_ingress = mlxsw_sp1_sb_cms_ingress,
@@ -851,6 +874,7 @@ const struct mlxsw_sp_sb_vals mlxsw_sp2_sb_vals = {
 	.pool_count = ARRAY_SIZE(mlxsw_sp2_sb_pool_dess),
 	.pool_dess = mlxsw_sp2_sb_pool_dess,
 	.pms = mlxsw_sp2_sb_pms,
+	.pms_cpu = mlxsw_sp_cpu_port_sb_pms,
 	.prs = mlxsw_sp2_sb_prs,
 	.mms = mlxsw_sp_sb_mms,
 	.cms_ingress = mlxsw_sp2_sb_cms_ingress,
@@ -900,6 +924,9 @@ int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
 	err = mlxsw_sp_cpu_port_sb_cms_init(mlxsw_sp);
 	if (err)
 		goto err_sb_cpu_port_sb_cms_init;
+	err = mlxsw_sp_cpu_port_sb_pms_init(mlxsw_sp);
+	if (err)
+		goto err_sb_cpu_port_pms_init;
 	err = mlxsw_sp_sb_mms_init(mlxsw_sp);
 	if (err)
 		goto err_sb_mms_init;
@@ -917,6 +944,7 @@ int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
 
 err_devlink_sb_register:
 err_sb_mms_init:
+err_sb_cpu_port_pms_init:
 err_sb_cpu_port_sb_cms_init:
 err_sb_prs_init:
 	mlxsw_sp_sb_ports_fini(mlxsw_sp);