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Message-Id: <20230607124628.157465-6-ulf.hansson@linaro.org>
Date: Wed, 7 Jun 2023 14:46:17 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Sudeep Holla <sudeep.holla@....com>,
Cristian Marussi <cristian.marussi@....com>,
Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
Stephen Boyd <sboyd@...nel.org>
Cc: Nikunj Kela <nkela@...cinc.com>,
Prasad Sodagudi <psodagud@...cinc.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Ulf Hansson <ulf.hansson@...aro.org>, linux-pm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 05/16] firmware: arm_scmi: Align perf ops to use domain-id as in-parameter
Most scmi_perf_proto_ops are already using an "u32 domain" as an
in-parameter to indicate what performance domain we shall operate upon.
However, some of the ops are using a "struct device *dev", which means an
an additional OF parsing is needed each time the perf ops gets called, to
find the corresponding domain-id.
To avoid a potential unnecessary OF parsing, but also to make the code more
consistent, let's replace the in-parameter "struct device *dev" with an
"u32 domain". Note that, this requires us to make some corresponding
changes to the scmi cpufreq driver, so let's do that too.
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
drivers/cpufreq/scmi-cpufreq.c | 14 +++++++++-----
drivers/firmware/arm_scmi/perf.c | 18 +++++-------------
include/linux/scmi_protocol.h | 6 +++---
3 files changed, 17 insertions(+), 21 deletions(-)
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index 7d05d48c0337..125e8a8421fb 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -137,7 +137,7 @@ scmi_get_cpu_power(struct device *cpu_dev, unsigned long *power,
static int scmi_cpufreq_init(struct cpufreq_policy *policy)
{
- int ret, nr_opp;
+ int ret, nr_opp, domain;
unsigned int latency;
struct device *cpu_dev;
struct scmi_data *priv;
@@ -149,6 +149,10 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
return -ENODEV;
}
+ domain = scmi_cpu_domain_id(cpu_dev);
+ if (domain < 0)
+ return domain;
+
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@@ -187,7 +191,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
*/
nr_opp = dev_pm_opp_get_opp_count(cpu_dev);
if (nr_opp <= 0) {
- ret = perf_ops->device_opps_add(ph, cpu_dev);
+ ret = perf_ops->device_opps_add(ph, cpu_dev, domain);
if (ret) {
dev_warn(cpu_dev, "failed to add opps to the device\n");
goto out_free_cpumask;
@@ -220,7 +224,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
}
priv->cpu_dev = cpu_dev;
- priv->domain_id = scmi_cpu_domain_id(cpu_dev);
+ priv->domain_id = domain;
policy->driver_data = priv;
policy->freq_table = freq_table;
@@ -228,14 +232,14 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
/* SCMI allows DVFS request for any domain from any CPU */
policy->dvfs_possible_from_any_cpu = true;
- latency = perf_ops->transition_latency_get(ph, cpu_dev);
+ latency = perf_ops->transition_latency_get(ph, domain);
if (!latency)
latency = CPUFREQ_ETERNAL;
policy->cpuinfo.transition_latency = latency;
policy->fast_switch_possible =
- perf_ops->fast_switch_possible(ph, cpu_dev);
+ perf_ops->fast_switch_possible(ph, domain);
return 0;
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 216bcd68d549..563fa44b1a71 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -593,18 +593,14 @@ static int scmi_dev_domain_id(struct device *dev)
}
static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph,
- struct device *dev)
+ struct device *dev, u32 domain)
{
- int idx, ret, domain;
+ int idx, ret;
unsigned long freq;
struct scmi_opp *opp;
struct perf_dom_info *dom;
struct scmi_perf_info *pi = ph->get_priv(ph);
- domain = scmi_dev_domain_id(dev);
- if (domain < 0)
- return domain;
-
dom = pi->dom_info + domain;
for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) {
@@ -626,14 +622,10 @@ static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph,
static int
scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph,
- struct device *dev)
+ u32 domain)
{
struct perf_dom_info *dom;
struct scmi_perf_info *pi = ph->get_priv(ph);
- int domain = scmi_dev_domain_id(dev);
-
- if (domain < 0)
- return domain;
dom = pi->dom_info + domain;
/* uS to nS */
@@ -693,12 +685,12 @@ static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph,
}
static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph,
- struct device *dev)
+ u32 domain)
{
struct perf_dom_info *dom;
struct scmi_perf_info *pi = ph->get_priv(ph);
- dom = pi->dom_info + scmi_dev_domain_id(dev);
+ dom = pi->dom_info + domain;
return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr;
}
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index 99c3e985c40f..34ecaeeb51bc 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -136,9 +136,9 @@ struct scmi_perf_proto_ops {
u32 *level, bool poll);
int (*device_domain_id)(struct device *dev);
int (*transition_latency_get)(const struct scmi_protocol_handle *ph,
- struct device *dev);
+ u32 domain);
int (*device_opps_add)(const struct scmi_protocol_handle *ph,
- struct device *dev);
+ struct device *dev, u32 domain);
int (*freq_set)(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long rate, bool poll);
int (*freq_get)(const struct scmi_protocol_handle *ph, u32 domain,
@@ -146,7 +146,7 @@ struct scmi_perf_proto_ops {
int (*est_power_get)(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long *rate, unsigned long *power);
bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph,
- struct device *dev);
+ u32 domain);
enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph);
};
--
2.34.1
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