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5f035af76e
Since 'tcfp_burst' with TICK factor, driver side always need to recover it to the original value, this patch moves the generic calculation and recover to the 'burst' original value before offloading to device driver. Signed-off-by: Po Liu <po.liu@nxp.com> Acked-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NET_TC_POLICE_H
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#define __NET_TC_POLICE_H
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#include <net/act_api.h>
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struct tcf_police_params {
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int tcfp_result;
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u32 tcfp_ewma_rate;
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s64 tcfp_burst;
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u32 tcfp_mtu;
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s64 tcfp_mtu_ptoks;
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struct psched_ratecfg rate;
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bool rate_present;
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struct psched_ratecfg peak;
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bool peak_present;
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struct rcu_head rcu;
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};
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struct tcf_police {
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struct tc_action common;
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struct tcf_police_params __rcu *params;
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spinlock_t tcfp_lock ____cacheline_aligned_in_smp;
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s64 tcfp_toks;
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s64 tcfp_ptoks;
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s64 tcfp_t_c;
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};
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#define to_police(pc) ((struct tcf_police *)pc)
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/* old policer structure from before tc actions */
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struct tc_police_compat {
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u32 index;
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int action;
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u32 limit;
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u32 burst;
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u32 mtu;
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struct tc_ratespec rate;
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struct tc_ratespec peakrate;
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};
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static inline bool is_tcf_police(const struct tc_action *act)
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{
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#ifdef CONFIG_NET_CLS_ACT
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if (act->ops && act->ops->id == TCA_ID_POLICE)
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return true;
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#endif
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return false;
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}
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static inline u64 tcf_police_rate_bytes_ps(const struct tc_action *act)
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{
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struct tcf_police *police = to_police(act);
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struct tcf_police_params *params;
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params = rcu_dereference_protected(police->params,
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lockdep_is_held(&police->tcf_lock));
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return params->rate.rate_bytes_ps;
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}
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static inline u32 tcf_police_burst(const struct tc_action *act)
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{
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struct tcf_police *police = to_police(act);
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struct tcf_police_params *params;
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u32 burst;
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params = rcu_dereference_protected(police->params,
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lockdep_is_held(&police->tcf_lock));
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/*
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* "rate" bytes "burst" nanoseconds
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* ------------ * -------------------
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* 1 second 2^6 ticks
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*
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* ------------------------------------
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* NSEC_PER_SEC nanoseconds
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* ------------------------
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* 2^6 ticks
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*
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* "rate" bytes "burst" nanoseconds 2^6 ticks
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* = ------------ * ------------------- * ------------------------
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* 1 second 2^6 ticks NSEC_PER_SEC nanoseconds
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*
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* "rate" * "burst"
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* = ---------------- bytes/nanosecond
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* NSEC_PER_SEC^2
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*
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*
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* "rate" * "burst"
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* = ---------------- bytes/second
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* NSEC_PER_SEC
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*/
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burst = div_u64(params->tcfp_burst * params->rate.rate_bytes_ps,
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NSEC_PER_SEC);
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return burst;
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}
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static inline u32 tcf_police_tcfp_mtu(const struct tc_action *act)
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{
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struct tcf_police *police = to_police(act);
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struct tcf_police_params *params;
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params = rcu_dereference_protected(police->params,
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lockdep_is_held(&police->tcf_lock));
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return params->tcfp_mtu;
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}
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#endif /* __NET_TC_POLICE_H */
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