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mlxsw: spectrum_qdisc: Extract a common leaf unoffload function

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When the RED Qdisc is unoffloaded, it needs to reduce the reported backlog
by the amount that is in the HW, so that only the SW backlog is contained
in the counter. The same thing will need to be done by TBF, and likely any
other leaf Qdisc as well.

Extract a helper mlxsw_sp_qdisc_leaf_unoffload() and call it from
mlxsw_sp_qdisc_red_unoffload().

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2020-01-24 15:23:09 +02:00 committed by David S. Miller
parent 3d0d592193
commit be1d5a8a77
1 changed files with 14 additions and 5 deletions
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19
drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
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@ -420,18 +420,27 @@ mlxsw_sp_qdisc_red_replace(struct mlxsw_sp_port *mlxsw_sp_port,
max, prob, p->is_ecn);
}
static void
mlxsw_sp_qdisc_leaf_unoffload(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_qdisc *mlxsw_sp_qdisc,
struct gnet_stats_queue *qstats)
{
u64 backlog;
backlog = mlxsw_sp_cells_bytes(mlxsw_sp_port->mlxsw_sp,
mlxsw_sp_qdisc->stats_base.backlog);
qstats->backlog -= backlog;
mlxsw_sp_qdisc->stats_base.backlog = 0;
}
static void
mlxsw_sp_qdisc_red_unoffload(struct mlxsw_sp_port *mlxsw_sp_port,
struct mlxsw_sp_qdisc *mlxsw_sp_qdisc,
void *params)
{
struct tc_red_qopt_offload_params *p = params;
u64 backlog;
backlog = mlxsw_sp_cells_bytes(mlxsw_sp_port->mlxsw_sp,
mlxsw_sp_qdisc->stats_base.backlog);
p->qstats->backlog -= backlog;
mlxsw_sp_qdisc->stats_base.backlog = 0;
mlxsw_sp_qdisc_leaf_unoffload(mlxsw_sp_port, mlxsw_sp_qdisc, p->qstats);
}
static int