diff options
| author | Po Liu <po.liu@nxp.com> | 2020-06-29 09:54:16 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-30 03:33:42 +0300 |
| commit | 5f035af76e51cd622abc6564d5512ffeb9e06917 (patch) | |
| tree | d8535555e53b97e2a5bac14887677f9715898151 /include/net/tc_act | |
| parent | 13f1555c1b4c49b8ab9dd80b7353deec0526ccac (diff) | |
| download | linux-5f035af76e51cd622abc6564d5512ffeb9e06917.tar.xz | |
net:qos: police action offloading parameter 'burst' change to the original value
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>
Diffstat (limited to 'include/net/tc_act')
| -rw-r--r-- | include/net/tc_act/tc_police.h | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/include/net/tc_act/tc_police.h b/include/net/tc_act/tc_police.h index cd973b10ae8c..6d1e26b709b5 100644 --- a/include/net/tc_act/tc_police.h +++ b/include/net/tc_act/tc_police.h @@ -59,14 +59,42 @@ static inline u64 tcf_police_rate_bytes_ps(const struct tc_action *act) return params->rate.rate_bytes_ps; } -static inline s64 tcf_police_tcfp_burst(const struct tc_action *act) +static inline u32 tcf_police_burst(const struct tc_action *act) { struct tcf_police *police = to_police(act); struct tcf_police_params *params; + u32 burst; params = rcu_dereference_protected(police->params, lockdep_is_held(&police->tcf_lock)); - return params->tcfp_burst; + + /* + * "rate" bytes "burst" nanoseconds + * ------------ * ------------------- + * 1 second 2^6 ticks + * + * ------------------------------------ + * NSEC_PER_SEC nanoseconds + * ------------------------ + * 2^6 ticks + * + * "rate" bytes "burst" nanoseconds 2^6 ticks + * = ------------ * ------------------- * ------------------------ + * 1 second 2^6 ticks NSEC_PER_SEC nanoseconds + * + * "rate" * "burst" + * = ---------------- bytes/nanosecond + * NSEC_PER_SEC^2 + * + * + * "rate" * "burst" + * = ---------------- bytes/second + * NSEC_PER_SEC + */ + burst = div_u64(params->tcfp_burst * params->rate.rate_bytes_ps, + NSEC_PER_SEC); + + return burst; } static inline u32 tcf_police_tcfp_mtu(const struct tc_action *act) |