Commit 5ebc6031 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

mlxsw: spectrum_dcb: Implement dcbnl_setbuffer / getbuffer 



Add dcbnl_setbuffer, which bounces requests if a headroom is in DCB mode.
Implement dcbnl_getbuffer such that it can always be used to determine
port-buffer configuration, regardless of headroom mode.

Signed-off-by: default avatarPetr Machata <petrm@nvidia.com>
Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 69e408a2

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

+59 −0
Original line number Diff line number Diff line
@@ -592,6 +592,62 @@ static int mlxsw_sp_dcbnl_ieee_setpfc(struct net_device *dev, 
	return err;

}



static int mlxsw_sp_dcbnl_getbuffer(struct net_device *dev, struct dcbnl_buffer *buf)

{

	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);

	struct mlxsw_sp_hdroom *hdroom = mlxsw_sp_port->hdroom;

	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;

	int prio;

	int i;



	buf->total_size = 0;



	BUILD_BUG_ON(DCBX_MAX_BUFFERS > MLXSW_SP_PB_COUNT);

	for (i = 0; i < MLXSW_SP_PB_COUNT; i++) {

		u32 bytes = mlxsw_sp_cells_bytes(mlxsw_sp, hdroom->bufs.buf[i].size_cells);



		if (i < DCBX_MAX_BUFFERS)

			buf->buffer_size[i] = bytes;

		buf->total_size += bytes;

	}



	buf->total_size += mlxsw_sp_cells_bytes(mlxsw_sp, hdroom->int_buf.size_cells);



	for (prio = 0; prio < IEEE_8021Q_MAX_PRIORITIES; prio++)

		buf->prio2buffer[prio] = hdroom->prios.prio[prio].buf_idx;



	return 0;

}



static int mlxsw_sp_dcbnl_setbuffer(struct net_device *dev, struct dcbnl_buffer *buf)

{

	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);

	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;

	struct mlxsw_sp_hdroom hdroom;

	int prio;

	int i;



	hdroom = *mlxsw_sp_port->hdroom;



	if (hdroom.mode != MLXSW_SP_HDROOM_MODE_TC) {

		netdev_err(dev, "The use of dcbnl_setbuffer is only allowed if egress is configured using TC\n");

		return -EINVAL;

	}



	for (prio = 0; prio < IEEE_8021Q_MAX_PRIORITIES; prio++)

		hdroom.prios.prio[prio].set_buf_idx = buf->prio2buffer[prio];



	BUILD_BUG_ON(DCBX_MAX_BUFFERS > MLXSW_SP_PB_COUNT);

	for (i = 0; i < DCBX_MAX_BUFFERS; i++)

		hdroom.bufs.buf[i].set_size_cells = mlxsw_sp_bytes_cells(mlxsw_sp,

									 buf->buffer_size[i]);



	mlxsw_sp_hdroom_prios_reset_buf_idx(&hdroom);

	mlxsw_sp_hdroom_bufs_reset_lossiness(&hdroom);

	mlxsw_sp_hdroom_bufs_reset_sizes(mlxsw_sp_port, &hdroom);

	return mlxsw_sp_hdroom_configure(mlxsw_sp_port, &hdroom);

}



static const struct dcbnl_rtnl_ops mlxsw_sp_dcbnl_ops = {

	.ieee_getets		= mlxsw_sp_dcbnl_ieee_getets,

	.ieee_setets		= mlxsw_sp_dcbnl_ieee_setets,
@@ -604,6 +660,9 @@ static const struct dcbnl_rtnl_ops mlxsw_sp_dcbnl_ops = { 


	.getdcbx		= mlxsw_sp_dcbnl_getdcbx,

	.setdcbx		= mlxsw_sp_dcbnl_setdcbx,



	.dcbnl_getbuffer	= mlxsw_sp_dcbnl_getbuffer,

	.dcbnl_setbuffer	= mlxsw_sp_dcbnl_setbuffer,

};



static int mlxsw_sp_port_ets_init(struct mlxsw_sp_port *mlxsw_sp_port)