mlxsw: spectrum_buffers: Pass SBPM min_size in cells

The SBPM register configures the shared buffer allocation and
configuration per port and pool. The min_buff value is the buffer size
dedicated to this single function, and is configured in cells.
Currently, all sb_pm entries have 0 for min_buff, and therefore the
actual unit is immaterial. However, in a follow-up patch we want to add
entries with non-zero minimum.

Therefore pass the min_buff from the sb_pm table through the cell
conversion before handing it over to mlxsw_sp_sb_pm_write().
Signed-off-by: NPetr Machata <petrm@mellanox.com>
Reviewed-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -523,9 +523,11 @@ static int mlxsw_sp_port_sb_pms_init(struct mlxsw_sp_port *mlxsw_sp_port)
 
 	for (i = 0; i < MLXSW_SP_SB_PMS_LEN; i++) {
 		const struct mlxsw_sp_sb_pm *pm = &mlxsw_sp_sb_pms[i];
+		u32 min_buff;
 
+		min_buff = mlxsw_sp_bytes_cells(mlxsw_sp, pm->min_buff);
 		err = mlxsw_sp_sb_pm_write(mlxsw_sp, mlxsw_sp_port->local_port,
-					   i, pm->min_buff, pm->max_buff);
+					   i, min_buff, pm->max_buff);
 		if (err)
 			return err;
 	}