| Message ID | 20240108140118.1596-3-quic_sibis@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | firmware: arm_scmi: Register and handle limits change notification | expand |
On 08-01-24, 19:31, Sibi Sankar wrote: > Add a new perf_opp_xlate interface to the existing perf_ops to translate > a given perf index to frequency. > > This can be used by the cpufreq driver and framework to determine the > throttled frequency from a given perf index and apply HW pressure > accordingly. > > Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com> > --- > drivers/firmware/arm_scmi/perf.c | 21 +++++++++++++++++++++ > include/linux/scmi_protocol.h | 3 +++ > 2 files changed, 24 insertions(+) > > diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c > index c167bb5e3607..f26390924e1c 100644 > --- a/drivers/firmware/arm_scmi/perf.c > +++ b/drivers/firmware/arm_scmi/perf.c > @@ -964,6 +964,26 @@ static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain > return 0; > } > > +static int scmi_perf_opp_xlate(const struct scmi_protocol_handle *ph, u32 domain, > + int idx, unsigned long *freq) > +{ > + struct perf_dom_info *dom; > + > + dom = scmi_perf_domain_lookup(ph, domain); > + if (IS_ERR(dom)) > + return PTR_ERR(dom); > + > + if (idx >= dom->opp_count) > + return -ERANGE; > + > + if (!dom->level_indexing_mode) > + *freq = dom->opp[idx].perf * dom->mult_factor; > + else > + *freq = dom->opp[idx].indicative_freq * dom->mult_factor; > + > + return 0; > +} > + > static const struct scmi_perf_proto_ops perf_proto_ops = { > .num_domains_get = scmi_perf_num_domains_get, > .info_get = scmi_perf_info_get, > @@ -979,6 +999,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { > .fast_switch_possible = scmi_fast_switch_possible, > .power_scale_get = scmi_power_scale_get, > .perf_notify_support = scmi_notify_support, > + .perf_opp_xlate = scmi_perf_opp_xlate, The use of "opp" here is a bit confusing as this doesn't have anything to do with the OPP framework and you are only getting the frequency out of it after all.
On 1/10/24 12:59, Viresh Kumar wrote: > On 08-01-24, 19:31, Sibi Sankar wrote: >> Add a new perf_opp_xlate interface to the existing perf_ops to translate >> a given perf index to frequency. >> Hey Viresh, Thanks for taking time to review the series! >> This can be used by the cpufreq driver and framework to determine the >> throttled frequency from a given perf index and apply HW pressure >> accordingly. >> >> Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com> >> --- >> drivers/firmware/arm_scmi/perf.c | 21 +++++++++++++++++++++ >> include/linux/scmi_protocol.h | 3 +++ >> 2 files changed, 24 insertions(+) >> >> diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c >> index c167bb5e3607..f26390924e1c 100644 >> --- a/drivers/firmware/arm_scmi/perf.c >> +++ b/drivers/firmware/arm_scmi/perf.c >> @@ -964,6 +964,26 @@ static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain >> return 0; >> } >> >> +static int scmi_perf_opp_xlate(const struct scmi_protocol_handle *ph, u32 domain, >> + int idx, unsigned long *freq) >> +{ >> + struct perf_dom_info *dom; >> + >> + dom = scmi_perf_domain_lookup(ph, domain); >> + if (IS_ERR(dom)) >> + return PTR_ERR(dom); >> + >> + if (idx >= dom->opp_count) >> + return -ERANGE; >> + >> + if (!dom->level_indexing_mode) >> + *freq = dom->opp[idx].perf * dom->mult_factor; >> + else >> + *freq = dom->opp[idx].indicative_freq * dom->mult_factor; >> + >> + return 0; >> +} >> + >> static const struct scmi_perf_proto_ops perf_proto_ops = { >> .num_domains_get = scmi_perf_num_domains_get, >> .info_get = scmi_perf_info_get, >> @@ -979,6 +999,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { >> .fast_switch_possible = scmi_fast_switch_possible, >> .power_scale_get = scmi_power_scale_get, >> .perf_notify_support = scmi_notify_support, >> + .perf_opp_xlate = scmi_perf_opp_xlate, > > The use of "opp" here is a bit confusing as this doesn't have anything to do > with the OPP framework and you are only getting the frequency out of it after > all. Sure will re-name it. -Sibi >
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index c167bb5e3607..f26390924e1c 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -964,6 +964,26 @@ static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain return 0; } +static int scmi_perf_opp_xlate(const struct scmi_protocol_handle *ph, u32 domain, + int idx, unsigned long *freq) +{ + struct perf_dom_info *dom; + + dom = scmi_perf_domain_lookup(ph, domain); + if (IS_ERR(dom)) + return PTR_ERR(dom); + + if (idx >= dom->opp_count) + return -ERANGE; + + if (!dom->level_indexing_mode) + *freq = dom->opp[idx].perf * dom->mult_factor; + else + *freq = dom->opp[idx].indicative_freq * dom->mult_factor; + + return 0; +} + static const struct scmi_perf_proto_ops perf_proto_ops = { .num_domains_get = scmi_perf_num_domains_get, .info_get = scmi_perf_info_get, @@ -979,6 +999,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { .fast_switch_possible = scmi_fast_switch_possible, .power_scale_get = scmi_power_scale_get, .perf_notify_support = scmi_notify_support, + .perf_opp_xlate = scmi_perf_opp_xlate, }; static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index b0947d004826..9c285ae89848 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -145,6 +145,7 @@ struct scmi_perf_notify_info { * @power_scale_mw_get: indicates if the power values provided are in milliWatts * or in some other (abstract) scale * @perf_notify_support: indicates if limit and level change notification is supported + * @perf_opp_xlate: translates the given perf index to frequency in Hz */ struct scmi_perf_proto_ops { int (*num_domains_get)(const struct scmi_protocol_handle *ph); @@ -173,6 +174,8 @@ struct scmi_perf_proto_ops { enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph); int (*perf_notify_support)(const struct scmi_protocol_handle *ph, u32 domain, struct scmi_perf_notify_info *info); + int (*perf_opp_xlate)(const struct scmi_protocol_handle *ph, u32 domain, + int idx, unsigned long *freq); }; /**
Add a new perf_opp_xlate interface to the existing perf_ops to translate a given perf index to frequency. This can be used by the cpufreq driver and framework to determine the throttled frequency from a given perf index and apply HW pressure accordingly. Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com> --- drivers/firmware/arm_scmi/perf.c | 21 +++++++++++++++++++++ include/linux/scmi_protocol.h | 3 +++ 2 files changed, 24 insertions(+)