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Message-ID: <20240117104116.2055349-3-quic_sibis@quicinc.com>
Date: Wed, 17 Jan 2024 16:11:14 +0530
From: Sibi Sankar <quic_sibis@...cinc.com>
To: <sudeep.holla@....com>, <cristian.marussi@....com>, <rafael@...nel.org>,
<viresh.kumar@...aro.org>, <morten.rasmussen@....com>,
<dietmar.eggemann@....com>, <lukasz.luba@....com>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-pm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <quic_mdtipton@...cinc.com>,
<linux-arm-msm@...r.kernel.org>, Sibi Sankar <quic_sibis@...cinc.com>
Subject: [PATCH V2 2/4] firmware: arm_scmi: Add perf_freq_xlate interface
Add a new perf_freq_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@...cinc.com>
---
v2:
* Rename opp_xlate -> freq_xlate [Viresh]
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 ae7681eda276..e286f04ee6e3 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -977,6 +977,26 @@ static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain
return 0;
}
+static int scmi_perf_freq_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,
@@ -992,6 +1012,7 @@ 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_freq_xlate = scmi_perf_freq_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..6221d391386c 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_freq_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_freq_xlate)(const struct scmi_protocol_handle *ph, u32 domain,
+ int idx, unsigned long *freq);
};
/**
--
2.34.1
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