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// SPDX-License-Identifier: GPL-2.0+
/* Microchip Sparx5 Switch driver
*
* Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries.
*/
#include <net/pkt_cls.h>
#include "sparx5_tc.h"
#include "sparx5_main.h"
#include "sparx5_qos.h"
static void sparx5_tc_get_layer_and_idx(u32 parent, u32 portno, u32 *layer,
u32 *idx)
{
if (parent == TC_H_ROOT) {
*layer = 2;
*idx = portno;
} else {
u32 queue = TC_H_MIN(parent) - 1;
*layer = 0;
*idx = SPX5_HSCH_L0_GET_IDX(portno, queue);
}
}
static int sparx5_tc_setup_qdisc_mqprio(struct net_device *ndev,
struct tc_mqprio_qopt_offload *m)
{
m->qopt.hw = TC_MQPRIO_HW_OFFLOAD_TCS;
if (m->qopt.num_tc == 0)
return sparx5_tc_mqprio_del(ndev);
else
return sparx5_tc_mqprio_add(ndev, m->qopt.num_tc);
}
static int sparx5_tc_setup_qdisc_tbf(struct net_device *ndev,
struct tc_tbf_qopt_offload *qopt)
{
struct sparx5_port *port = netdev_priv(ndev);
u32 layer, se_idx;
sparx5_tc_get_layer_and_idx(qopt->parent, port->portno, &layer,
&se_idx);
switch (qopt->command) {
case TC_TBF_REPLACE:
return sparx5_tc_tbf_add(port, &qopt->replace_params, layer,
se_idx);
case TC_TBF_DESTROY:
return sparx5_tc_tbf_del(port, layer, se_idx);
case TC_TBF_STATS:
return -EOPNOTSUPP;
default:
return -EOPNOTSUPP;
}
return -EOPNOTSUPP;
}
static int sparx5_tc_setup_qdisc_ets(struct net_device *ndev,
struct tc_ets_qopt_offload *qopt)
{
struct tc_ets_qopt_offload_replace_params *params =
&qopt->replace_params;
struct sparx5_port *port = netdev_priv(ndev);
int i;
/* Only allow ets on ports */
if (qopt->parent != TC_H_ROOT)
return -EOPNOTSUPP;
switch (qopt->command) {
case TC_ETS_REPLACE:
/* We support eight priorities */
if (params->bands != SPX5_PRIOS)
return -EOPNOTSUPP;
/* Sanity checks */
for (i = 0; i < SPX5_PRIOS; ++i) {
/* Priority map is *always* reverse e.g: 7 6 5 .. 0 */
if (params->priomap[i] != (7 - i))
return -EOPNOTSUPP;
/* Throw an error if we receive zero weights by tc */
if (params->quanta[i] && params->weights[i] == 0) {
pr_err("Invalid ets configuration; band %d has weight zero",
i);
return -EINVAL;
}
}
sparx5_tc_ets_add(port, params);
break;
case TC_ETS_DESTROY:
sparx5_tc_ets_del(port);
break;
case TC_ETS_GRAFT:
return -EOPNOTSUPP;
default:
return -EOPNOTSUPP;
}
return -EOPNOTSUPP;
}
int sparx5_port_setup_tc(struct net_device *ndev, enum tc_setup_type type,
void *type_data)
{
switch (type) {
case TC_SETUP_QDISC_MQPRIO:
return sparx5_tc_setup_qdisc_mqprio(ndev, type_data);
case TC_SETUP_QDISC_TBF:
return sparx5_tc_setup_qdisc_tbf(ndev, type_data);
case TC_SETUP_QDISC_ETS:
return sparx5_tc_setup_qdisc_ets(ndev, type_data);
default:
return -EOPNOTSUPP;
}
return 0;
}
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