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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-09 02:38:25 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-09 02:38:25 +0300 |
commit | 30f349097897c115345beabeecc5e710b479ff1e (patch) | |
tree | 9b14075bff9e0ded922a2e45ec392bed22e10470 /drivers/cpufreq/scmi-cpufreq.c | |
parent | 9c566611ac5cc7b45af943632f7a9b1b6a642991 (diff) | |
parent | f76c87e8c33766cc6a7bf7461dfac9cebb05b5df (diff) | |
download | linux-30f349097897c115345beabeecc5e710b479ff1e.tar.xz |
Merge tag 'pm-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These are mostly ARM cpufreq driver updates, including one new
MediaTek driver that has just passed all of the reviews, with the
addition of a revert of a recent intel_pstate commit, some core
cpufreq changes and a DT-related update of the operating performance
points (OPP) support code.
Specifics:
- Add new cpufreq driver for the MediaTek MT6779 platform called
mediatek-hw along with corresponding DT bindings (Hector.Yuan).
- Add DCVS interrupt support to the qcom-cpufreq-hw driver (Thara
Gopinath).
- Make the qcom-cpufreq-hw driver set the dvfs_possible_from_any_cpu
policy flag (Taniya Das).
- Blocklist more Qualcomm platforms in cpufreq-dt-platdev (Bjorn
Andersson).
- Make the vexpress cpufreq driver set the CPUFREQ_IS_COOLING_DEV
flag (Viresh Kumar).
- Add new cpufreq driver callback to allow drivers to register with
the Energy Model in a consistent way and make several drivers use
it (Viresh Kumar).
- Change the remaining users of the .ready() cpufreq driver callback
to move the code from it elsewhere and drop it from the cpufreq
core (Viresh Kumar).
- Revert recent intel_pstate change adding HWP guaranteed performance
change notification support to it that led to problems, because the
notification in question is triggered prematurely on some systems
(Rafael Wysocki).
- Convert the OPP DT bindings to DT schema and clean them up while at
it (Rob Herring)"
* tag 'pm-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (23 commits)
Revert "cpufreq: intel_pstate: Process HWP Guaranteed change notification"
cpufreq: mediatek-hw: Add support for CPUFREQ HW
cpufreq: Add of_perf_domain_get_sharing_cpumask
dt-bindings: cpufreq: add bindings for MediaTek cpufreq HW
cpufreq: Remove ready() callback
cpufreq: sh: Remove sh_cpufreq_cpu_ready()
cpufreq: acpi: Remove acpi_cpufreq_cpu_ready()
cpufreq: qcom-hw: Set dvfs_possible_from_any_cpu cpufreq driver flag
cpufreq: blocklist more Qualcomm platforms in cpufreq-dt-platdev
cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support
cpufreq: scmi: Use .register_em() to register with energy model
cpufreq: vexpress: Use .register_em() to register with energy model
cpufreq: scpi: Use .register_em() to register with energy model
dt-bindings: opp: Convert to DT schema
dt-bindings: Clean-up OPP binding node names in examples
ARM: dts: omap: Drop references to opp.txt
cpufreq: qcom-cpufreq-hw: Use .register_em() to register with energy model
cpufreq: omap: Use .register_em() to register with energy model
cpufreq: mediatek: Use .register_em() to register with energy model
cpufreq: imx6q: Use .register_em() to register with energy model
...
Diffstat (limited to 'drivers/cpufreq/scmi-cpufreq.c')
-rw-r--r-- | drivers/cpufreq/scmi-cpufreq.c | 65 |
1 files changed, 42 insertions, 23 deletions
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 75f818d04b48..1e0cd4d165f0 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -22,7 +22,9 @@ struct scmi_data { int domain_id; + int nr_opp; struct device *cpu_dev; + cpumask_var_t opp_shared_cpus; }; static struct scmi_protocol_handle *ph; @@ -123,9 +125,6 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) struct device *cpu_dev; struct scmi_data *priv; struct cpufreq_frequency_table *freq_table; - struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power); - cpumask_var_t opp_shared_cpus; - bool power_scale_mw; cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -133,9 +132,15 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) return -ENODEV; } - if (!zalloc_cpumask_var(&opp_shared_cpus, GFP_KERNEL)) + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) return -ENOMEM; + if (!zalloc_cpumask_var(&priv->opp_shared_cpus, GFP_KERNEL)) { + ret = -ENOMEM; + goto out_free_priv; + } + /* Obtain CPUs that share SCMI performance controls */ ret = scmi_get_sharing_cpus(cpu_dev, policy->cpus); if (ret) { @@ -148,14 +153,14 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) * The OPP 'sharing cpus' info may come from DT through an empty opp * table and opp-shared. */ - ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, opp_shared_cpus); - if (ret || !cpumask_weight(opp_shared_cpus)) { + ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, priv->opp_shared_cpus); + if (ret || !cpumask_weight(priv->opp_shared_cpus)) { /* * Either opp-table is not set or no opp-shared was found. * Use the CPU mask from SCMI to designate CPUs sharing an OPP * table. */ - cpumask_copy(opp_shared_cpus, policy->cpus); + cpumask_copy(priv->opp_shared_cpus, policy->cpus); } /* @@ -180,7 +185,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) goto out_free_opp; } - ret = dev_pm_opp_set_sharing_cpus(cpu_dev, opp_shared_cpus); + ret = dev_pm_opp_set_sharing_cpus(cpu_dev, priv->opp_shared_cpus); if (ret) { dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n", __func__, ret); @@ -188,21 +193,13 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) goto out_free_opp; } - power_scale_mw = perf_ops->power_scale_mw_get(ph); - em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, - opp_shared_cpus, power_scale_mw); - } - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) { - ret = -ENOMEM; - goto out_free_opp; + priv->nr_opp = nr_opp; } ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table); if (ret) { dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret); - goto out_free_priv; + goto out_free_opp; } priv->cpu_dev = cpu_dev; @@ -223,17 +220,16 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) policy->fast_switch_possible = perf_ops->fast_switch_possible(ph, cpu_dev); - free_cpumask_var(opp_shared_cpus); return 0; -out_free_priv: - kfree(priv); - out_free_opp: dev_pm_opp_remove_all_dynamic(cpu_dev); out_free_cpumask: - free_cpumask_var(opp_shared_cpus); + free_cpumask_var(priv->opp_shared_cpus); + +out_free_priv: + kfree(priv); return ret; } @@ -244,11 +240,33 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy) dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table); dev_pm_opp_remove_all_dynamic(priv->cpu_dev); + free_cpumask_var(priv->opp_shared_cpus); kfree(priv); return 0; } +static void scmi_cpufreq_register_em(struct cpufreq_policy *policy) +{ + struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power); + bool power_scale_mw = perf_ops->power_scale_mw_get(ph); + struct scmi_data *priv = policy->driver_data; + + /* + * This callback will be called for each policy, but we don't need to + * register with EM every time. Despite not being part of the same + * policy, some CPUs may still share their perf-domains, and a CPU from + * another policy may already have registered with EM on behalf of CPUs + * of this policy. + */ + if (!priv->nr_opp) + return; + + em_dev_register_perf_domain(get_cpu_device(policy->cpu), priv->nr_opp, + &em_cb, priv->opp_shared_cpus, + power_scale_mw); +} + static struct cpufreq_driver scmi_cpufreq_driver = { .name = "scmi", .flags = CPUFREQ_HAVE_GOVERNOR_PER_POLICY | @@ -261,6 +279,7 @@ static struct cpufreq_driver scmi_cpufreq_driver = { .get = scmi_cpufreq_get_rate, .init = scmi_cpufreq_init, .exit = scmi_cpufreq_exit, + .register_em = scmi_cpufreq_register_em, }; static int scmi_cpufreq_probe(struct scmi_device *sdev) |