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cppc_cpufreq: simplify use of performance capabilities

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The CPPC performance capabilities are used significantly throughout
the driver.

Simplify the use of them by introducing a local pointer "caps" to
point to cpu_data->perf_caps, in functions that access performance
capabilities often.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ionela Voinescu 2020-11-05 12:55:19 +00:00 committed by Rafael J. Wysocki
parent 48ad8dc940
commit bb025fb6c2
1 changed files with 23 additions and 17 deletions
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40
drivers/cpufreq/cppc_cpufreq.c
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@ -183,15 +183,16 @@ static int cppc_verify_policy(struct cpufreq_policy_data *policy)
static void cppc_cpufreq_stop_cpu(struct cpufreq_policy *policy)
{
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
unsigned int cpu = policy->cpu;
int ret;
cpu_data->perf_ctrls.desired_perf = cpu_data->perf_caps.lowest_perf;
cpu_data->perf_ctrls.desired_perf = caps->lowest_perf;
ret = cppc_set_perf(cpu, &cpu_data->perf_ctrls);
if (ret)
pr_debug("Err setting perf value:%d on CPU:%d. ret:%d\n",
cpu_data->perf_caps.lowest_perf, cpu, ret);
caps->lowest_perf, cpu, ret);
}
/*
@ -240,11 +241,12 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu)
static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
unsigned int cpu = policy->cpu;
int ret = 0;
cpu_data->cpu = cpu;
ret = cppc_get_perf_caps(cpu, &cpu_data->perf_caps);
ret = cppc_get_perf_caps(cpu, caps);
if (ret) {
pr_debug("Err reading CPU%d perf capabilities. ret:%d\n",
@ -253,23 +255,27 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
/* Convert the lowest and nominal freq from MHz to KHz */
cpu_data->perf_caps.lowest_freq *= 1000;
cpu_data->perf_caps.nominal_freq *= 1000;
caps->lowest_freq *= 1000;
caps->nominal_freq *= 1000;
/*
* Set min to lowest nonlinear perf to avoid any efficiency penalty (see
* Section 8.4.7.1.1.5 of ACPI 6.1 spec)
*/
policy->min = cppc_cpufreq_perf_to_khz(cpu_data, cpu_data->perf_caps.lowest_nonlinear_perf);
policy->max = cppc_cpufreq_perf_to_khz(cpu_data, cpu_data->perf_caps.nominal_perf);
policy->min = cppc_cpufreq_perf_to_khz(cpu_data,
caps->lowest_nonlinear_perf);
policy->max = cppc_cpufreq_perf_to_khz(cpu_data,
caps->nominal_perf);
/*
* Set cpuinfo.min_freq to Lowest to make the full range of performance
* available if userspace wants to use any perf between lowest & lowest
* nonlinear perf
*/
policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu_data, cpu_data->perf_caps.lowest_perf);
policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu_data, cpu_data->perf_caps.nominal_perf);
policy->cpuinfo.min_freq = cppc_cpufreq_perf_to_khz(cpu_data,
caps->lowest_perf);
policy->cpuinfo.max_freq = cppc_cpufreq_perf_to_khz(cpu_data,
caps->nominal_perf);
policy->transition_delay_us = cppc_cpufreq_get_transition_delay_us(cpu);
policy->shared_type = cpu_data->shared_type;
@ -283,7 +289,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
if (unlikely(i == cpu))
continue;
memcpy(&all_cpu_data[i]->perf_caps, &cpu_data->perf_caps,
memcpy(&all_cpu_data[i]->perf_caps, caps,
sizeof(cpu_data->perf_caps));
}
} else if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL) {
@ -298,18 +304,17 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
* If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
* is supported.
*/
if (cpu_data->perf_caps.highest_perf > cpu_data->perf_caps.nominal_perf)
if (caps->highest_perf > caps->nominal_perf)
boost_supported = true;
/* Set policy->cur to max now. The governors will adjust later. */
policy->cur = cppc_cpufreq_perf_to_khz(cpu_data,
cpu_data->perf_caps.highest_perf);
cpu_data->perf_ctrls.desired_perf = cpu_data->perf_caps.highest_perf;
policy->cur = cppc_cpufreq_perf_to_khz(cpu_data, caps->highest_perf);
cpu_data->perf_ctrls.desired_perf = caps->highest_perf;
ret = cppc_set_perf(cpu, &cpu_data->perf_ctrls);
if (ret)
pr_debug("Err setting perf value:%d on CPU:%d. ret:%d\n",
cpu_data->perf_caps.highest_perf, cpu, ret);
caps->highest_perf, cpu, ret);
return ret;
}
@ -368,6 +373,7 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpu)
static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
{
struct cppc_cpudata *cpu_data = all_cpu_data[policy->cpu];
struct cppc_perf_caps *caps = &cpu_data->perf_caps;
int ret;
if (!boost_supported) {
@ -377,10 +383,10 @@ static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
if (state)
policy->max = cppc_cpufreq_perf_to_khz(cpu_data,
cpu_data->perf_caps.highest_perf);
caps->highest_perf);
else
policy->max = cppc_cpufreq_perf_to_khz(cpu_data,
cpu_data->perf_caps.nominal_perf);
caps->nominal_perf);
policy->cpuinfo.max_freq = policy->max;
ret = freq_qos_update_request(policy->max_freq_req, policy->max);