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| author | Pierre Gondois <pierre.gondois@arm.com> | 2024-02-22 14:56:59 +0100 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2024-03-06 10:54:15 +0530 |
| commit | ad86f7e959dc1814c3b2bcbeb08c3c02214110a7 (patch) | |
| tree | 30c13f6bad1ab943d694d399f7bca547bf23395c /include/linux/scmi_protocol.h | |
| parent | 3093fa33539b54db77171d2919352ad4f044a1c5 (diff) | |
| download | lwn-ad86f7e959dc1814c3b2bcbeb08c3c02214110a7.tar.gz lwn-ad86f7e959dc1814c3b2bcbeb08c3c02214110a7.zip | |
firmware: arm_scmi: Populate perf commands rate_limit
Arm SCMI spec. v3.2, s4.5.3.4 PERFORMANCE_DOMAIN_ATTRIBUTES
defines a per-domain rate_limit for performance requests:
"""
Rate Limit in microseconds, indicating the minimum time
required between successive requests. A value of 0
indicates that this field is not supported by the
platform. This field does not apply to FastChannels.
""""
The field is first defined in SCMI v1.0.
Add support to fetch this value and advertise it through
a rate_limit_get() callback.
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'include/linux/scmi_protocol.h')
| -rw-r--r-- | include/linux/scmi_protocol.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index f2f05fb42d28..acd956ffcb84 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -128,6 +128,8 @@ struct scmi_perf_domain_info { * @level_set: sets the performance level of a domain * @level_get: gets the performance level of a domain * @transition_latency_get: gets the DVFS transition latency for a given device + * @rate_limit_get: gets the minimum time (us) required between successive + * requests * @device_opps_add: adds all the OPPs for a given device * @freq_set: sets the frequency for a given device using sustained frequency * to sustained performance level mapping @@ -154,6 +156,8 @@ struct scmi_perf_proto_ops { u32 *level, bool poll); int (*transition_latency_get)(const struct scmi_protocol_handle *ph, u32 domain); + int (*rate_limit_get)(const struct scmi_protocol_handle *ph, + u32 domain, u32 *rate_limit); int (*device_opps_add)(const struct scmi_protocol_handle *ph, struct device *dev, u32 domain); int (*freq_set)(const struct scmi_protocol_handle *ph, u32 domain, |