| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/dvfs/ |
| D | performance-domain.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dvfs/performance-domain.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic performance domains
10 - Sudeep Holla <sudeep.holla@arm.com>
13 This binding is intended for performance management of groups of devices or
14 CPUs that run in the same performance domain. Performance domains must not
15 be confused with power domains. A performance domain is defined by a set
16 of devices that always have to run at the same performance level. For a given
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| /kernel/linux/linux-6.6/include/linux/ |
| D | energy_model.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
14 * struct em_perf_state - Performance state of a performance domain
32 * EM_PERF_STATE_INEFFICIENT: The performance state is inefficient. There is
33 * in this em_perf_domain, another performance state with a higher frequency
40 * struct em_perf_domain - Performance domain
41 * @table: List of performance states, in ascending order
42 * @nr_perf_states: Number of performance states
44 * @cpus: Cpumask covering the CPUs of the domain. It's here
45 * for performance reasons to avoid potential cache
49 * In case of CPU device, a "performance domain" represents a group of CPUs
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| D | scmi_protocol.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2018-2021 ARM Ltd.
21 * struct scmi_revision_info - version information structure
30 * @impl_ver: A vendor-specific implementation version.
32 * @sub_vendor_id: A sub-vendor identifier(Null terminated ASCII string)
74 * struct scmi_clk_proto_ops - represents the various operations provided
106 * struct scmi_perf_proto_ops - represents the various operations provided
107 * by SCMI Performance Protocol
109 * @num_domains_get: gets the number of supported performance domains
110 * @info_get: get the information of a performance domain
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| /kernel/linux/linux-5.10/include/linux/ |
| D | energy_model.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
14 * em_perf_state - Performance state of a performance domain
16 * @power: The power consumed at this level, in milli-watts (by 1 CPU or
29 * em_perf_domain - Performance domain
30 * @table: List of performance states, in ascending order
31 * @nr_perf_states: Number of performance states
32 * @cpus: Cpumask covering the CPUs of the domain. It's here
33 * for performance reasons to avoid potential cache
37 * In case of CPU device, a "performance domain" represents a group of CPUs
38 * whose performance is scaled together. All CPUs of a performance domain
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| D | scmi_protocol.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
19 * struct scmi_revision_info - version information structure
28 * @impl_ver: A vendor-specific implementation version.
30 * @sub_vendor_id: A sub-vendor identifier(Null terminated ASCII string)
61 * struct scmi_clk_ops - represents the various operations provided
85 * struct scmi_perf_ops - represents the various operations provided
86 * by SCMI Performance Protocol
88 * @limits_set: sets limits on the performance level of a domain
89 * @limits_get: gets limits on the performance level of a domain
90 * @level_set: sets the performance level of a domain
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/cpufreq/ |
| D | cpufreq-mediatek-hw.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/cpufreq/cpufreq-mediatek-hw.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Hector Yuan <hector.yuan@mediatek.com>
19 const: mediatek,cpufreq-hw
26 each frequency domain. Each entry corresponds to
27 a register bank for each frequency domain present.
29 "#performance-domain-cells":
31 Number of cells in a performance domain specifier.
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| D | apple,cluster-cpufreq.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/cpufreq/apple,cluster-cpufreq.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Hector Martin <marcan@marcan.st>
13 Apple SoCs (e.g. M1) have a per-cpu-cluster DVFS controller that is part of
15 operating-points-v2 table to define the CPU performance states, with the
16 opp-level property specifying the hardware p-state index for that level.
21 - items:
22 - enum:
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| /kernel/linux/linux-5.10/kernel/power/ |
| D | energy_model.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2018-2020, Arm ltd.
20 * Mutex serializing the registrations of performance domains and letting
27 return (dev->bus == &cpu_subsys); in _is_cpu_device()
38 snprintf(name, sizeof(name), "ps:%lu", ps->frequency); in em_debug_create_ps()
40 /* Create per-ps directory */ in em_debug_create_ps()
42 debugfs_create_ulong("frequency", 0444, d, &ps->frequency); in em_debug_create_ps()
43 debugfs_create_ulong("power", 0444, d, &ps->power); in em_debug_create_ps()
44 debugfs_create_ulong("cost", 0444, d, &ps->cost); in em_debug_create_ps()
49 seq_printf(s, "%*pbl\n", cpumask_pr_args(to_cpumask(s->private))); in em_debug_cpus_show()
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| /kernel/linux/linux-6.6/kernel/power/ |
| D | energy_model.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2018-2021, Arm ltd.
21 * Mutex serializing the registrations of performance domains and letting
28 return (dev->bus == &cpu_subsys); in _is_cpu_device()
39 snprintf(name, sizeof(name), "ps:%lu", ps->frequency); in em_debug_create_ps()
41 /* Create per-ps directory */ in em_debug_create_ps()
43 debugfs_create_ulong("frequency", 0444, d, &ps->frequency); in em_debug_create_ps()
44 debugfs_create_ulong("power", 0444, d, &ps->power); in em_debug_create_ps()
45 debugfs_create_ulong("cost", 0444, d, &ps->cost); in em_debug_create_ps()
46 debugfs_create_ulong("inefficient", 0444, d, &ps->flags); in em_debug_create_ps()
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| /kernel/linux/linux-5.10/Documentation/power/ |
| D | energy-model.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 -----------
11 the power consumed by devices at various performance levels, and the kernel
12 subsystems willing to use that information to make energy-aware decisions.
18 each and every client subsystem to re-implement support for each and every
23 The figure below depicts an example of drivers (Arm-specific here, but the
27 +---------------+ +-----------------+ +---------------+
29 +---------------+ +-----------------+ +---------------+
32 +---------+ | +---------+
35 +---------------------+
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| /kernel/linux/linux-6.6/Documentation/power/ |
| D | energy-model.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 -----------
11 the power consumed by devices at various performance levels, and the kernel
12 subsystems willing to use that information to make energy-aware decisions.
18 each and every client subsystem to re-implement support for each and every
23 The power values might be expressed in micro-Watts or in an 'abstract scale'.
26 can be found in the Energy-Aware Scheduler documentation
27 Documentation/scheduler/sched-energy.rst. For some subsystems like thermal or
30 thus the real micro-Watts might be needed. An example of these requirements can
32 Documentation/driver-api/thermal/power_allocator.rst.
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| /kernel/linux/linux-6.6/Documentation/scheduler/ |
| D | sched-energy.rst | 6 ---------------
25 please refer to its documentation (see Documentation/power/energy-model.rst).
29 -----------------------------
32 - energy = [joule] (resource like a battery on powered devices)
33 - power = energy/time = [joule/second] = [watt]
38 performance [inst/s]
39 --------------------
45 -----------
48 while still getting 'good' performance. It is essentially an alternative
49 optimization objective to the current performance-only objective for the
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| /kernel/linux/linux-5.10/Documentation/scheduler/ |
| D | sched-energy.rst | 6 ---------------
25 please refer to its documentation (see Documentation/power/energy-model.rst).
29 -----------------------------
32 - energy = [joule] (resource like a battery on powered devices)
33 - power = energy/time = [joule/second] = [watt]
38 performance [inst/s]
39 --------------------
45 -----------
48 while still getting 'good' performance. It is essentially an alternative
49 optimization objective to the current performance-only objective for the
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| /kernel/linux/linux-5.10/drivers/acpi/ |
| D | processor_perflib.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * processor_perflib.c - ACPI Processor P-States Library ($Revision: 71 $)
9 * - Added processor hotplug support
26 #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
43 * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
45 * 0 -> cpufreq low level drivers initialized -> consider _PPC values
46 * 1 -> ignore _PPC totally -> forced by user through boot param
48 static int ignore_ppc = -1;
64 return -EINVAL; in acpi_processor_get_platform_limit()
70 status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); in acpi_processor_get_platform_limit()
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| /kernel/linux/linux-6.6/drivers/acpi/ |
| D | processor_perflib.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * processor_perflib.c - ACPI Processor P-States Library ($Revision: 71 $)
9 * - Added processor hotplug support
25 #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
40 * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
42 * 0 -> cpufreq low level drivers initialized -> consider _PPC values
43 * 1 -> ignore _PPC totally -> forced by user through boot param
45 static int ignore_ppc = -1;
61 return -EINVAL; in acpi_processor_get_platform_limit()
67 status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); in acpi_processor_get_platform_limit()
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| /kernel/linux/linux-6.6/Documentation/powerpc/ |
| D | associativity.rst | 6 domains of substantially similar mean performance relative to resources outside
7 of that domain. Resources subsets of a given domain that exhibit better
8 performance relative to each other than relative to other resources subsets
9 are represented as being members of a sub-grouping domain. This performance
17 Hypervisor indicates the type/form of associativity used via "ibm,architecture-vec-5 property".
18 Bit 0 of byte 5 in the "ibm,architecture-vec-5" property indicates usage of Form 0 or Form 1.
20 bit 2 of byte 5 in the "ibm,architecture-vec-5" property is used.
23 ------
27 ------
28 With Form 1 a combination of ibm,associativity-reference-points, and ibm,associativity
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| /kernel/linux/linux-5.10/Documentation/powerpc/ |
| D | associativity.rst | 6 domains of substantially similar mean performance relative to resources outside
7 of that domain. Resources subsets of a given domain that exhibit better
8 performance relative to each other than relative to other resources subsets
9 are represented as being members of a sub-grouping domain. This performance
17 Hypervisor indicates the type/form of associativity used via "ibm,architecture-vec-5 property".
18 Bit 0 of byte 5 in the "ibm,architecture-vec-5" property indicates usage of Form 0 or Form 1.
20 bit 2 of byte 5 in the "ibm,architecture-vec-5" property is used.
23 ------
27 ------
28 With Form 1 a combination of ibm,associativity-reference-points, and ibm,associativity
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| /kernel/linux/linux-5.10/include/dt-bindings/power/ |
| D | qcom-rpmpd.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
7 /* SDM845 Power Domain Indexes */
18 /* SM8150 Power Domain Indexes */
31 /* SM8250 Power Domain Indexes */
43 /* SC7180 Power Domain Indexes */
53 /* SDM845 Power Domain performance levels */
67 /* MSM8976 Power Domain Indexes */
75 /* MSM8996 Power Domain Indexes */
84 /* MSM8998 Power Domain Indexes */
105 /* RPM SMD Power Domain performance levels */
|
| /kernel/linux/linux-5.10/drivers/soc/qcom/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
15 the low-power state for resources related to the remoteproc
26 resource on a RPM-hardened platform must use this database to get
43 be called qcom-cpr
87 allocate memory from OCMEM based on performance, latency and power
106 purpose of exchanging sector-data between the remote filesystem
112 bool "Qualcomm RPM-Hardened (RPMH) Communication"
115 Support for communication with the hardened-RPM blocks in
122 tristate "Qualcomm RPMh Power domain driver"
125 QCOM RPMh Power domain driver to support power-domains with
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| /kernel/linux/linux-6.6/drivers/base/power/ |
| D | domain.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain.c - Common code related to device power domains.
35 __routine = genpd->dev_ops.callback; \
54 mutex_lock(&genpd->mlock); in genpd_lock_mtx()
60 mutex_lock_nested(&genpd->mlock, depth); in genpd_lock_nested_mtx()
65 return mutex_lock_interruptible(&genpd->mlock); in genpd_lock_interruptible_mtx()
70 return mutex_unlock(&genpd->mlock); in genpd_unlock_mtx()
81 __acquires(&genpd->slock) in genpd_lock_spin()
85 spin_lock_irqsave(&genpd->slock, flags); in genpd_lock_spin()
86 genpd->lock_flags = flags; in genpd_lock_spin()
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| /kernel/linux/linux-6.6/arch/arm64/boot/dts/mediatek/ |
| D | mt8192.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
7 /dts-v1/;
8 #include <dt-bindings/clock/mt8192-clk.h>
9 #include <dt-bindings/gce/mt8192-gce.h>
10 #include <dt-bindings/interrupt-controller/arm-gic.h>
11 #include <dt-bindings/interrupt-controller/irq.h>
12 #include <dt-bindings/memory/mt8192-larb-port.h>
13 #include <dt-bindings/pinctrl/mt8192-pinfunc.h>
14 #include <dt-bindings/phy/phy.h>
15 #include <dt-bindings/power/mt8192-power.h>
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| /kernel/linux/linux-5.10/drivers/base/power/ |
| D | domain.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain.c - Common code related to device power domains.
34 __routine = genpd->dev_ops.callback; \
53 mutex_lock(&genpd->mlock); in genpd_lock_mtx()
59 mutex_lock_nested(&genpd->mlock, depth); in genpd_lock_nested_mtx()
64 return mutex_lock_interruptible(&genpd->mlock); in genpd_lock_interruptible_mtx()
69 return mutex_unlock(&genpd->mlock); in genpd_unlock_mtx()
80 __acquires(&genpd->slock) in genpd_lock_spin()
84 spin_lock_irqsave(&genpd->slock, flags); in genpd_lock_spin()
85 genpd->lock_flags = flags; in genpd_lock_spin()
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| /kernel/linux/linux-6.6/drivers/soc/qcom/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
15 the low-power state for resources related to the remoteproc
26 resource on a RPM-hardened platform must use this database to get
43 be called qcom-cpr
87 allocate memory from OCMEM based on performance, latency and power
110 Say yes here to support USB-C and battery status on modern Qualcomm
133 purpose of exchanging sector-data between the remote filesystem
142 The RPM Master sleep stats driver provides detailed per-subsystem
144 assess whether all the low-power modes available are entered as
150 tristate "Qualcomm RPM-Hardened (RPMH) Communication"
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| /kernel/linux/linux-6.6/drivers/clk/tegra/ |
| D | clk-device.c | 1 // SPDX-License-Identifier: GPL-2.0-only
4 #include <linux/clk-provider.h>
18 * This driver manages performance state of the core power domain for the
33 struct device *dev = clk_dev->dev; in tegra_clock_set_pd_state()
38 if (opp == ERR_PTR(-ERANGE)) { in tegra_clock_set_pd_state()
43 * need to set up performance state of the power domain and in tegra_clock_set_pd_state()
71 mutex_lock(&clk_dev->lock); in tegra_clock_change_notify()
74 if (cnd->new_rate > cnd->old_rate) in tegra_clock_change_notify()
75 err = tegra_clock_set_pd_state(clk_dev, cnd->new_rate); in tegra_clock_change_notify()
79 err = tegra_clock_set_pd_state(clk_dev, cnd->old_rate); in tegra_clock_change_notify()
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| /kernel/linux/linux-6.6/drivers/cpufreq/ |
| D | scmi-cpufreq.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2018-2021 ARM Ltd.
11 #include <linux/clk-provider.h>
45 priv = policy->driver_data; in scmi_cpufreq_get_rate()
47 ret = perf_ops->freq_get(ph, priv->domain_id, &rate, false); in scmi_cpufreq_get_rate()
54 * perf_ops->freq_set is not a synchronous, the actual OPP change will
61 struct scmi_data *priv = policy->driver_data; in scmi_cpufreq_set_target()
62 u64 freq = policy->freq_table[index].frequency; in scmi_cpufreq_set_target()
64 return perf_ops->freq_set(ph, priv->domain_id, freq * 1000, false); in scmi_cpufreq_set_target()
70 struct scmi_data *priv = policy->driver_data; in scmi_cpufreq_fast_switch()
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