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// SPDX-License-Identifier: GPL-2.0+
#include "lan966x_main.h"
int lan966x_cbs_add(struct lan966x_port *port,
struct tc_cbs_qopt_offload *qopt)
{
struct lan966x *lan966x = port->lan966x;
u32 cir, cbs;
u8 se_idx;
/* Check for invalid values */
if (qopt->idleslope <= 0 ||
qopt->sendslope >= 0 ||
qopt->locredit >= qopt->hicredit)
return -EINVAL;
se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + qopt->queue;
cir = qopt->idleslope;
cbs = (qopt->idleslope - qopt->sendslope) *
(qopt->hicredit - qopt->locredit) /
-qopt->sendslope;
/* Rate unit is 100 kbps */
cir = DIV_ROUND_UP(cir, 100);
/* Avoid using zero rate */
cir = cir ?: 1;
/* Burst unit is 4kB */
cbs = DIV_ROUND_UP(cbs, 4096);
/* Avoid using zero burst */
cbs = cbs ?: 1;
/* Check that actually the result can be written */
if (cir > GENMASK(15, 0) ||
cbs > GENMASK(6, 0))
return -EINVAL;
lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(1) |
QSYS_SE_CFG_SE_FRM_MODE_SET(1),
QSYS_SE_CFG_SE_AVB_ENA |
QSYS_SE_CFG_SE_FRM_MODE,
lan966x, QSYS_SE_CFG(se_idx));
lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(cir) |
QSYS_CIR_CFG_CIR_BURST_SET(cbs),
lan966x, QSYS_CIR_CFG(se_idx));
return 0;
}
int lan966x_cbs_del(struct lan966x_port *port,
struct tc_cbs_qopt_offload *qopt)
{
struct lan966x *lan966x = port->lan966x;
u8 se_idx;
se_idx = SE_IDX_QUEUE + port->chip_port * NUM_PRIO_QUEUES + qopt->queue;
lan_rmw(QSYS_SE_CFG_SE_AVB_ENA_SET(1) |
QSYS_SE_CFG_SE_FRM_MODE_SET(0),
QSYS_SE_CFG_SE_AVB_ENA |
QSYS_SE_CFG_SE_FRM_MODE,
lan966x, QSYS_SE_CFG(se_idx));
lan_wr(QSYS_CIR_CFG_CIR_RATE_SET(0) |
QSYS_CIR_CFG_CIR_BURST_SET(0),
lan966x, QSYS_CIR_CFG(se_idx));
return 0;
}
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