diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c index 971f689dd833..e11a0abfc663 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c @@ -41,9 +41,12 @@ #include "spectrum.h" #include "reg.h" +#define MLXSW_SP_PRIO_BAND_TO_TCLASS(band) (IEEE_8021QAZ_MAX_TCS - band - 1) + enum mlxsw_sp_qdisc_type { MLXSW_SP_QDISC_NO_QDISC, MLXSW_SP_QDISC_RED, + MLXSW_SP_QDISC_PRIO, }; struct mlxsw_sp_qdisc_ops { @@ -63,6 +66,11 @@ struct mlxsw_sp_qdisc_ops { void *xstats_ptr); void (*clean_stats)(struct mlxsw_sp_port *mlxsw_sp_port, struct mlxsw_sp_qdisc *mlxsw_sp_qdisc); + /* unoffload - to be used for a qdisc that stops being offloaded without + * being destroyed. + */ + void (*unoffload)(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc, void *params); }; struct mlxsw_sp_qdisc { @@ -76,6 +84,7 @@ struct mlxsw_sp_qdisc { u64 tx_packets; u64 drops; u64 overlimits; + u64 backlog; } stats_base; struct mlxsw_sp_qdisc_ops *ops; @@ -141,6 +150,9 @@ mlxsw_sp_qdisc_replace(struct mlxsw_sp_port *mlxsw_sp_port, u32 handle, err_bad_param: err_config: + if (mlxsw_sp_qdisc->handle == handle && ops->unoffload) + ops->unoffload(mlxsw_sp_port, mlxsw_sp_qdisc, params); + mlxsw_sp_qdisc_destroy(mlxsw_sp_port, mlxsw_sp_qdisc); return err; } @@ -403,6 +415,165 @@ int mlxsw_sp_setup_tc_red(struct mlxsw_sp_port *mlxsw_sp_port, } } +static int +mlxsw_sp_qdisc_prio_destroy(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc) +{ + int i; + + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) + mlxsw_sp_port_prio_tc_set(mlxsw_sp_port, i, + MLXSW_SP_PORT_DEFAULT_TCLASS); + + return 0; +} + +static int +mlxsw_sp_qdisc_prio_check_params(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc, + void *params) +{ + struct tc_prio_qopt_offload_params *p = params; + + if (p->bands > IEEE_8021QAZ_MAX_TCS) + return -EOPNOTSUPP; + + return 0; +} + +static int +mlxsw_sp_qdisc_prio_replace(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc, + void *params) +{ + struct tc_prio_qopt_offload_params *p = params; + int tclass, i; + int err; + + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { + tclass = MLXSW_SP_PRIO_BAND_TO_TCLASS(p->priomap[i]); + err = mlxsw_sp_port_prio_tc_set(mlxsw_sp_port, i, tclass); + if (err) + return err; + } + + return 0; +} + +void +mlxsw_sp_qdisc_prio_unoffload(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc, + void *params) +{ + struct tc_prio_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; +} + +static int +mlxsw_sp_qdisc_get_prio_stats(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc, + struct tc_qopt_offload_stats *stats_ptr) +{ + u64 tx_bytes, tx_packets, drops = 0, backlog = 0; + struct mlxsw_sp_qdisc_stats *stats_base; + struct mlxsw_sp_port_xstats *xstats; + struct rtnl_link_stats64 *stats; + int i; + + xstats = &mlxsw_sp_port->periodic_hw_stats.xstats; + stats = &mlxsw_sp_port->periodic_hw_stats.stats; + stats_base = &mlxsw_sp_qdisc->stats_base; + + tx_bytes = stats->tx_bytes - stats_base->tx_bytes; + tx_packets = stats->tx_packets - stats_base->tx_packets; + + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) { + drops += xstats->tail_drop[i]; + backlog += xstats->backlog[i]; + } + drops = drops - stats_base->drops; + + _bstats_update(stats_ptr->bstats, tx_bytes, tx_packets); + stats_ptr->qstats->drops += drops; + stats_ptr->qstats->backlog += + mlxsw_sp_cells_bytes(mlxsw_sp_port->mlxsw_sp, + backlog) - + mlxsw_sp_cells_bytes(mlxsw_sp_port->mlxsw_sp, + stats_base->backlog); + stats_base->backlog = backlog; + stats_base->drops += drops; + stats_base->tx_bytes += tx_bytes; + stats_base->tx_packets += tx_packets; + return 0; +} + +static void +mlxsw_sp_setup_tc_qdisc_prio_clean_stats(struct mlxsw_sp_port *mlxsw_sp_port, + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc) +{ + struct mlxsw_sp_qdisc_stats *stats_base; + struct mlxsw_sp_port_xstats *xstats; + struct rtnl_link_stats64 *stats; + int i; + + xstats = &mlxsw_sp_port->periodic_hw_stats.xstats; + stats = &mlxsw_sp_port->periodic_hw_stats.stats; + stats_base = &mlxsw_sp_qdisc->stats_base; + + stats_base->tx_packets = stats->tx_packets; + stats_base->tx_bytes = stats->tx_bytes; + + stats_base->drops = 0; + for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) + stats_base->drops += xstats->tail_drop[i]; + + mlxsw_sp_qdisc->stats_base.backlog = 0; +} + +static struct mlxsw_sp_qdisc_ops mlxsw_sp_qdisc_ops_prio = { + .type = MLXSW_SP_QDISC_PRIO, + .check_params = mlxsw_sp_qdisc_prio_check_params, + .replace = mlxsw_sp_qdisc_prio_replace, + .unoffload = mlxsw_sp_qdisc_prio_unoffload, + .destroy = mlxsw_sp_qdisc_prio_destroy, + .get_stats = mlxsw_sp_qdisc_get_prio_stats, + .clean_stats = mlxsw_sp_setup_tc_qdisc_prio_clean_stats, +}; + +int mlxsw_sp_setup_tc_prio(struct mlxsw_sp_port *mlxsw_sp_port, + struct tc_prio_qopt_offload *p) +{ + struct mlxsw_sp_qdisc *mlxsw_sp_qdisc; + + if (p->parent != TC_H_ROOT) + return -EOPNOTSUPP; + + mlxsw_sp_qdisc = mlxsw_sp_port->root_qdisc; + if (p->command == TC_PRIO_REPLACE) + return mlxsw_sp_qdisc_replace(mlxsw_sp_port, p->handle, + mlxsw_sp_qdisc, + &mlxsw_sp_qdisc_ops_prio, + &p->replace_params); + + if (!mlxsw_sp_qdisc_compare(mlxsw_sp_qdisc, p->handle, + MLXSW_SP_QDISC_PRIO)) + return -EOPNOTSUPP; + + switch (p->command) { + case TC_PRIO_DESTROY: + return mlxsw_sp_qdisc_destroy(mlxsw_sp_port, mlxsw_sp_qdisc); + case TC_PRIO_STATS: + return mlxsw_sp_qdisc_get_stats(mlxsw_sp_port, mlxsw_sp_qdisc, + &p->stats); + default: + return -EOPNOTSUPP; + } +} + int mlxsw_sp_tc_qdisc_init(struct mlxsw_sp_port *mlxsw_sp_port) { mlxsw_sp_port->root_qdisc = kzalloc(sizeof(*mlxsw_sp_port->root_qdisc), |
