diff options
Diffstat (limited to 'drivers/net/ethernet/microchip/lan966x/lan966x_police.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/lan966x/lan966x_police.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_police.c b/drivers/net/ethernet/microchip/lan966x/lan966x_police.c new file mode 100644 index 000000000..7d66fe75c --- /dev/null +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_police.c @@ -0,0 +1,235 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include "lan966x_main.h" + +/* 0-8 : 9 port policers */ +#define POL_IDX_PORT 0 + +/* Policer order: Serial (QoS -> Port -> VCAP) */ +#define POL_ORDER 0x1d3 + +struct lan966x_tc_policer { + /* kilobit per second */ + u32 rate; + /* bytes */ + u32 burst; +}; + +static int lan966x_police_add(struct lan966x_port *port, + struct lan966x_tc_policer *pol, + u16 pol_idx) +{ + struct lan966x *lan966x = port->lan966x; + + /* Rate unit is 33 1/3 kpps */ + pol->rate = DIV_ROUND_UP(pol->rate * 3, 100); + /* Avoid zero burst size */ + pol->burst = pol->burst ?: 1; + /* Unit is 4kB */ + pol->burst = DIV_ROUND_UP(pol->burst, 4096); + + if (pol->rate > GENMASK(15, 0) || + pol->burst > GENMASK(6, 0)) + return -EINVAL; + + lan_wr(ANA_POL_MODE_DROP_ON_YELLOW_ENA_SET(0) | + ANA_POL_MODE_MARK_ALL_FRMS_RED_ENA_SET(0) | + ANA_POL_MODE_IPG_SIZE_SET(20) | + ANA_POL_MODE_FRM_MODE_SET(1) | + ANA_POL_MODE_OVERSHOOT_ENA_SET(1), + lan966x, ANA_POL_MODE(pol_idx)); + + lan_wr(ANA_POL_PIR_STATE_PIR_LVL_SET(0), + lan966x, ANA_POL_PIR_STATE(pol_idx)); + + lan_wr(ANA_POL_PIR_CFG_PIR_RATE_SET(pol->rate) | + ANA_POL_PIR_CFG_PIR_BURST_SET(pol->burst), + lan966x, ANA_POL_PIR_CFG(pol_idx)); + + return 0; +} + +static int lan966x_police_del(struct lan966x_port *port, + u16 pol_idx) +{ + struct lan966x *lan966x = port->lan966x; + + lan_wr(ANA_POL_MODE_DROP_ON_YELLOW_ENA_SET(0) | + ANA_POL_MODE_MARK_ALL_FRMS_RED_ENA_SET(0) | + ANA_POL_MODE_IPG_SIZE_SET(20) | + ANA_POL_MODE_FRM_MODE_SET(2) | + ANA_POL_MODE_OVERSHOOT_ENA_SET(1), + lan966x, ANA_POL_MODE(pol_idx)); + + lan_wr(ANA_POL_PIR_STATE_PIR_LVL_SET(0), + lan966x, ANA_POL_PIR_STATE(pol_idx)); + + lan_wr(ANA_POL_PIR_CFG_PIR_RATE_SET(GENMASK(14, 0)) | + ANA_POL_PIR_CFG_PIR_BURST_SET(0), + lan966x, ANA_POL_PIR_CFG(pol_idx)); + + return 0; +} + +static int lan966x_police_validate(struct lan966x_port *port, + const struct flow_action *action, + const struct flow_action_entry *act, + unsigned long police_id, + bool ingress, + struct netlink_ext_ack *extack) +{ + if (act->police.exceed.act_id != FLOW_ACTION_DROP) { + NL_SET_ERR_MSG_MOD(extack, + "Offload not supported when exceed action is not drop"); + return -EOPNOTSUPP; + } + + if (act->police.notexceed.act_id != FLOW_ACTION_PIPE && + act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) { + NL_SET_ERR_MSG_MOD(extack, + "Offload not supported when conform action is not pipe or ok"); + return -EOPNOTSUPP; + } + + if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT && + !flow_action_is_last_entry(action, act)) { + NL_SET_ERR_MSG_MOD(extack, + "Offload not supported when conform action is ok, but action is not last"); + return -EOPNOTSUPP; + } + + if (act->police.peakrate_bytes_ps || + act->police.avrate || act->police.overhead) { + NL_SET_ERR_MSG_MOD(extack, + "Offload not supported when peakrate/avrate/overhead is configured"); + return -EOPNOTSUPP; + } + + if (act->police.rate_pkt_ps) { + NL_SET_ERR_MSG_MOD(extack, + "QoS offload not support packets per second"); + return -EOPNOTSUPP; + } + + if (!ingress) { + NL_SET_ERR_MSG_MOD(extack, + "Policer is not supported on egress"); + return -EOPNOTSUPP; + } + + if (port->tc.ingress_shared_block) { + NL_SET_ERR_MSG_MOD(extack, + "Policer is not supported on shared ingress blocks"); + return -EOPNOTSUPP; + } + + if (port->tc.police_id && port->tc.police_id != police_id) { + NL_SET_ERR_MSG_MOD(extack, + "Only one policer per port is supported"); + return -EEXIST; + } + + return 0; +} + +int lan966x_police_port_add(struct lan966x_port *port, + struct flow_action *action, + struct flow_action_entry *act, + unsigned long police_id, + bool ingress, + struct netlink_ext_ack *extack) +{ + struct lan966x *lan966x = port->lan966x; + struct rtnl_link_stats64 new_stats; + struct lan966x_tc_policer pol; + struct flow_stats *old_stats; + int err; + + err = lan966x_police_validate(port, action, act, police_id, ingress, + extack); + if (err) + return err; + + memset(&pol, 0, sizeof(pol)); + + pol.rate = div_u64(act->police.rate_bytes_ps, 1000) * 8; + pol.burst = act->police.burst; + + err = lan966x_police_add(port, &pol, POL_IDX_PORT + port->chip_port); + if (err) { + NL_SET_ERR_MSG_MOD(extack, + "Failed to add policer to port"); + return err; + } + + lan_rmw(ANA_POL_CFG_PORT_POL_ENA_SET(1) | + ANA_POL_CFG_POL_ORDER_SET(POL_ORDER), + ANA_POL_CFG_PORT_POL_ENA | + ANA_POL_CFG_POL_ORDER, + lan966x, ANA_POL_CFG(port->chip_port)); + + port->tc.police_id = police_id; + + /* Setup initial stats */ + old_stats = &port->tc.police_stat; + lan966x_stats_get(port->dev, &new_stats); + old_stats->bytes = new_stats.rx_bytes; + old_stats->pkts = new_stats.rx_packets; + old_stats->drops = new_stats.rx_dropped; + old_stats->lastused = jiffies; + + return 0; +} + +int lan966x_police_port_del(struct lan966x_port *port, + unsigned long police_id, + struct netlink_ext_ack *extack) +{ + struct lan966x *lan966x = port->lan966x; + int err; + + if (port->tc.police_id != police_id) { + NL_SET_ERR_MSG_MOD(extack, + "Invalid policer id"); + return -EINVAL; + } + + err = lan966x_police_del(port, POL_IDX_PORT + port->chip_port); + if (err) { + NL_SET_ERR_MSG_MOD(extack, + "Failed to add policer to port"); + return err; + } + + lan_rmw(ANA_POL_CFG_PORT_POL_ENA_SET(0) | + ANA_POL_CFG_POL_ORDER_SET(POL_ORDER), + ANA_POL_CFG_PORT_POL_ENA | + ANA_POL_CFG_POL_ORDER, + lan966x, ANA_POL_CFG(port->chip_port)); + + port->tc.police_id = 0; + + return 0; +} + +void lan966x_police_port_stats(struct lan966x_port *port, + struct flow_stats *stats) +{ + struct rtnl_link_stats64 new_stats; + struct flow_stats *old_stats; + + old_stats = &port->tc.police_stat; + lan966x_stats_get(port->dev, &new_stats); + + flow_stats_update(stats, + new_stats.rx_bytes - old_stats->bytes, + new_stats.rx_packets - old_stats->pkts, + new_stats.rx_dropped - old_stats->drops, + old_stats->lastused, + FLOW_ACTION_HW_STATS_IMMEDIATE); + + old_stats->bytes = new_stats.rx_bytes; + old_stats->pkts = new_stats.rx_packets; + old_stats->drops = new_stats.rx_dropped; + old_stats->lastused = jiffies; +} |