- 15 Feb, 2023 7 commits
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Geert Uytterhoeven authored
Document support for the Thermal Sensor/Chip Internal Voltage Monitor/Core Voltage Monitor (THS/CIVM/CVM) on the Renesas R-Car V4H (R8A779G0) SoC. Unlike most other R-Car Gen3 and Gen4 SoCs, it has 4 instead of 3 sensors, so increase the maximum number of reg tuples. Just like other R-Car Gen4 SoCs, interrupts are not routed to the INTC-AP but to the ECM. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by:
Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by:
Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Link: https://lore.kernel.org/r/11f740522ec479011cc8eef6bb450603be394def.1675958665.git.geert+renesas@glider.beSigned-off-by:
Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Balsam CHIHI authored
The Low Voltage Thermal Sensor (LVTS) is a multiple sensors, multi controllers contained in a thermal domain. A thermal domains can be the MCU or the AP. Each thermal domains contain up to seven controllers, each thermal controller handle up to four thermal sensors. The LVTS has two Finite State Machines (FSM), one to handle the functionin temperatures range like hot or cold temperature and another one to handle monitoring trip point. The FSM notifies via interrupts when a trip point is crossed. The interrupt is managed at the thermal controller level, so when an interrupt occurs, the driver has to find out which sensor triggered such an interrupt. The sampling of the thermal can be filtered or immediate. For the former, the LVTS measures several points and applies a low pass filter. Signed-off-by:
Balsam CHIHI <bchihi@baylibre.com> Reviewed-by:
AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> On MT8195 Tomato Chromebook: Tested-by:
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Balsam CHIHI authored
Add LVTS thermal controllers dt-binding definition for mt8192 and mt8195. Signed-off-by:
Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230209105628.50294-3-bchihi@baylibre.comSigned-off-by:
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Balsam CHIHI authored
Add MediaTek proprietary folder to upstream more thermal zone and cooler drivers, relocate the original thermal controller driver to it, and rename it as "auxadc_thermal.c" to show its purpose more clearly. Signed-off-by:
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Vincent Guittot authored
thermal_sampling_init() suscribes to THERMAL_GENL_SAMPLING_GROUP_NAME group so thermal_sampling_exit() should unsubscribe from the same group. Fixes: 47c4b0de ("tools/lib/thermal: Add a thermal library") Signed-off-by:
Vincent Guittot <vincent.guittot@linaro.org> Link: https://lore.kernel.org/r/20230202102812.453357-1-vincent.guittot@linaro.orgSigned-off-by:
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Rafael J. Wysocki authored
Merge thermal control changes related to Intel platforms for 6.3-rc1: - Rework ACPI helper functions for thermal control to retrieve a trip point temperature instead of initializing a trip point objetc (Rafael Wysocki). - Clean up and improve the int340x thermal driver ((Rafael Wysocki). - Simplify and clean up the intel_pch thermal driver ((Rafael Wysocki). - Fix the Intel powerclamp thermal driver and make it use the common idle injection framework (Srinivas Pandruvada). - Add two module parameters, cpumask and max_idle, to the Intel powerclamp thermal driver to allow it to affect only a specific subset of CPUs instead of all of them (Srinivas Pandruvada). - Make the Intel quark_dts thermal driver Use generic trip point objects instead of its own trip point representation (Daniel Lezcano). - Add toctree entry for thermal documents and fix two issues in the Intel powerclamp driver documentation (Bagas Sanjaya). * thermal-intel: (25 commits) Documentation: powerclamp: Fix numbered lists formatting Documentation: powerclamp: Escape wildcard in cpumask description Documentation: admin-guide: Add toctree entry for thermal docs thermal: intel: powerclamp: Add two module parameters Documentation: admin-guide: Move intel_powerclamp documentation thermal: intel: powerclamp: Fix duration module parameter thermal: intel: powerclamp: Return last requested state as cur_state thermal: intel: quark_dts: Use generic trip points thermal: intel: powerclamp: Use powercap idle-inject feature powercap: idle_inject: Add update callback powercap: idle_inject: Export symbols thermal: intel: powerclamp: Fix cur_state for multi package system thermal: intel: intel_pch: Drop struct board_info thermal: intel: intel_pch: Rename board ID symbols thermal: intel: intel_pch: Fold suspend and resume routines into their callers thermal: intel: intel_pch: Fold two functions into their callers thermal: intel: intel_pch: Eliminate device operations object thermal: intel: intel_pch: Rename device operations callbacks thermal: intel: intel_pch: Eliminate redundant return pointers thermal: intel: intel_pch: Make pch_wpt_add_acpi_psv_trip() return int ...
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Rafael J. Wysocki authored
Merge thermal control core changes for 6.3-rc1: - Clean up thermal device unregistration code (Viresh Kumar). - Fix and clean up thermal control core initialization error code paths (Daniel Lezcano). - Relocate the trip points handling code into a separate file (Daniel Lezcano). - Make the thermal core fail registration of thermal zones and cooling devices if the thermal class has not been registered (Rafael Wysocki). - Make the core thermal control code use sysfs_emit_at() instead of scnprintf() where applicable (ye xingchen). * thermal-core: thermal: core: Use sysfs_emit_at() instead of scnprintf() thermal: Fail object registration if thermal class is not registered thermal/core: Move the thermal trip code to a dedicated file thermal/core: Remove unneeded ida_destroy() thermal/core: Fix unregistering netlink at thermal init time thermal: core: Use device_unregister() instead of device_del/put() thermal: core: Move cdev cleanup to thermal_release()
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- 13 Feb, 2023 3 commits
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Bagas Sanjaya authored
Texts in numbered lists are rendered as continous paragraph when there should have been breaks between first line text in the beginning of list item and the description. Fix this by adding appropriate line breaks and indent the rest of lines to match the first line of numbered list item. Fixes: d6d71ee4 ("PM: Introduce Intel PowerClamp Driver") Fixes: 6bbe6f57 ("docs: thermal: convert to ReST") Signed-off-by:
Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by:
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Bagas Sanjaya authored
kernel test robot reported htmldocs warning: Documentation/admin-guide/thermal/intel_powerclamp.rst:328: WARNING: Inline emphasis start-string without end-string. The mistaken asterisk in /proc/irq/*/smp_affinity is rendered as hyperlink as the result. Escape the asterisk to fix above warning. Link: https://lore.kernel.org/linux-doc/202302122247.N4S791c4-lkp@intel.com/ Fixes: ebf51971 ("thermal: intel: powerclamp: Add two module parameters") Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
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Bagas Sanjaya authored
kernel test robot reported htmldocs warnings: Documentation/admin-guide/index.rst:62: WARNING: toctree contains reference to nonexisting document 'admin-guide/thermal' Documentation/admin-guide/thermal/intel_powerclamp.rst: WARNING: document isn't included in any toctree Add toctree entry for thermal/ docs to fix these warnings. Link: https://lore.kernel.org/linux-doc/202302121759.MmJgDTxc-lkp@intel.com/ Fixes: 707bf8e1 ("Documentation: admin-guide: Move intel_powerclamp documentation") Reported-by:
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- 09 Feb, 2023 4 commits
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Srinivas Pandruvada authored
In some use cases, it is desirable to only inject idle on certain set of CPUs. For example on Alder Lake systems, it is possible that we force idle only on P-Cores for thermal reasons. Also the idle percent can be more than 50% if we only choose partial set of CPUs in the system. Introduce 2 new module parameters for this purpose. They can be only changed when the cooling device is inactive. cpumask (Read/Write): A bit mask of CPUs to inject idle. The format of this bitmask is same as used in other subsystems like in /proc/irq/*/smp_affinity. The mask is comma separated 32 bit groups. Each CPU is one bit. For example for 256 CPU system the full mask is: ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff The rightmost mask is for CPU 0-32. max_idle (Read/Write): Maximum injected idle time to the total CPU time ratio in percent range from 1 to 100. Even if the cooling device max_state is always 100 (100%), this parameter allows to add a max idle percent limit. The default is 50, to match the current implementation of powerclamp driver. Also doesn't allow value more than 75, if the cpumask includes every CPU present in the system. Also when the cpumask doesn't include every CPU, there is no use of compensation using package C-state idle counters. Hence don't start package C-state polling thread even for a single package or a single die system in this case. Signed-off-by:
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
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Srinivas Pandruvada authored
Create a folder "thermal" under Documentation/admin-guide and move intel_powerclamp documentation to this folder. Signed-off-by:
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ye xingchen authored
Follow the advice in Documentation/filesystems/sysfs.rst that show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by:
ye xingchen <ye.xingchen@zte.com.cn> [ rjw: Subject and changelog edits ] Signed-off-by:
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Srinivas Pandruvada authored
After the switch to use the powercap/idle-inject framework in the Intel powerclamp driver, the idle duration unit is microsecond. However, the module parameter for idle duration is in milliseconds, so convert it to microseconds in the "set" callback and back to milliseconds in a new "get" callback. While here, also use mutex protection for setting and getting "duration". The other uses of "duration" are already protected by the mutex. Fixes: 8526eb7f ("thermal: intel: powerclamp: Use powercap idle-inject feature") Signed-off-by:
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- 07 Feb, 2023 1 commit
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Srinivas Pandruvada authored
When the user is reading cur_state from the thermal cooling device for Intel powerclamp device: - It returns the idle ratio from Package C-state counters when there is active idle injection session. - -1, when there is no active idle injection session. This information is not very useful as the package C-state counters vary a lot from read to read. Instead just return the last requested cur_state. Signed-off-by:
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- 03 Feb, 2023 2 commits
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Daniel Lezcano authored
Make the intel_quark_dts_thermal driver register an array of generic trip points along with the thermal zone and drop the trip points thermal zone callbacks that are not used any more from it. Signed-off-by:
Daniel Lezcano <daniel.lezcano@kernel.org> [ rjw: Subject and changelog edits ] Signed-off-by:
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Srinivas Pandruvada authored
There are two idle injection implementation in the Linux kernel. One via intel_powerclamp and the other using powercap/idle_inject. Both implementation end up in calling play_idle* function from a FIFO priority thread. Both can't be used at the same time. It is better to use one idle injection framework for better maintainability. In this way, there is only one caller for play_idle. Here powercap/idle_inject can be used for both per-core and for system wide idle injection. This framework has a well defined interface which allow registry for per-core or for all CPUs (system wide). This reduces code complexity in the intel powerclamp driver as all the per CPU kthreads, delayed work and calls to play_idle can be removed. The changes include: - Remove unneeded include files - Remove per CPU kthread workers: balancing_work and idle_injection_work. - Reuse the compensation related code by moving from previous worker thread to idle_injection callback. - Adjust the idle_duration and runtime by using powercap/idle_inject interface. - Remove all variables, which are not required once powercap/idle_inject is used. - Add mutex to avoid race during removal of idle injection during module unload and user action to change idle inject percent. Also for protection during dynamic adjustment of run and idle time from update() callback. - Remove online/offline callbacks to designate control CPU - Use cpu_present_mask global variable for CPU mask - Remove hot plug locks Signed-off-by:
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- 02 Feb, 2023 16 commits
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Srinivas Pandruvada authored
The powercap/idle_inject core uses play_idle_precise() to inject idle time. But play_idle_precise() can't ensure that the CPU is fully idle for the specified duration because of wakeups due to interrupts. To compensate for the reduced idle time due to these wakes, the caller can adjust requested idle time for the next cycle. The goal of idle injection is to keep system at some idle percent on average, so this is fine to overshoot or undershoot instantaneous idle times. The idle inject core provides an interface idle_inject_set_duration() to set idle and runtime duration. Some architectures provide interface to get actual idle time observed by the hardware. So, the effective idle percent can be adjusted using the hardware feedback. For example, Intel CPUs provides package idle counters, which is currently used by Intel powerclamp driver to readjust runtime duration. When the caller's desired idle time over a period is less or greater than the actual CPU idle time observed by the hardware, caller can readjust idle and runtime duration for the next cycle. The only way this can be done currently is by monitoring hardware idle time from a different software thread and readjust idle and runtime duration using idle_inject_set_duration(). This can be avoided by adding a callback which callers can register and readjust from this callback function. Add a capability to register an optional update() callback, which can be called from the idle inject core before waking up CPUs for idle injection. This callback can be registered via a new interface: idle_inject_register_full(). During this process of constantly adjusting idle and runtime duration there can be some cases where actual idle time is more than the desired. In this case idle inject can be skipped for a cycle. If update() callback returns false, then the idle inject core skips waking up CPUs for the idle injection. Signed-off-by:
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Srinivas Pandruvada authored
Export symbols for external interfaces, so that they can be used in other loadable modules. Export is done under name space IDLE_INJECT. Signed-off-by:
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Srinivas Pandruvada authored
The powerclamp cooling device cur_state shows actual idle observed by package C-state idle counters. But the implementation is not sufficient for multi package or multi die system. The cur_state value is incorrect. On these systems, these counters must be read from each package/die and somehow aggregate them. But there is no good method for aggregation. It was not a problem when explicit CPU model addition was required to enable intel powerclamp. In this way certain CPU models could have been avoided. But with the removal of CPU model check with the availability of Package C-state counters, the driver is loaded on most of the recent systems. For multi package/die systems, just show the actual target idle state, the system is trying to achieve. In powerclamp this is the user set state minus one. Also there is no use of starting a worker thread for polling package C-state counters and applying any compensation for multiple package or multiple die systems. Fixes: b721ca0d ("thermal/powerclamp: remove cpu whitelist") Signed-off-by:
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Rafael J. Wysocki authored
Because the only member of struct board_info is the name, the board_info[] array of struct board_info elements can be replaced with an array of strings. Modify the code accordingly and drop struct board_info. No intentional functional impact. Suggested-by:
Zhang Rui <rui.zhang@intel.com> Signed-off-by:
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Rafael J. Wysocki authored
Use capitals in the names of the board ID symbols and add the PCH_ prefix to each of them for consistency. Also rename the board_ids enum accordingly. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
Fold pch_suspend() and pch_resume(), that each have only one caller, into their respective callers to make the code somewhat easier to follow. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
Fold two functions, pch_hw_init() and pch_get_temp(), that each have only one caller, into their respective callers to make the code somewhat easier to follow. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
The same device operations object is pointed to by all of the board configurations in the driver, so effectively the same operations callbacks are used by all of them which only adds overhead (that can be significant due to retpolines) for no real purpose. For this reason, drop the device operations object and replace the respective callback invocations by direct calls to the specific functions that were previously pointed to by callback pointers. No intentional change in behavior. Signed-off-by:
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Rafael J. Wysocki authored
Because the same device operations callbacks are used for all supported boards, they are in fact generic, so rename them to reflect that. Also rename the operations object itself for consistency. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
Both pch_wpt_init() and pch_wpt_get_temp() can return the proper result via their return values, so they do not need to use return pointers. Modify them accordingly. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
Modify pch_wpt_add_acpi_psv_trip() to return an int value instead of using a return pointer for that. While at it, drop an excessive empty code line. Signed-off-by:
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Rafael J. Wysocki authored
Instead of using snprintf() to populate the ACPI object name in int340x_thermal_set_trip_temp(), use an appropriate initializer and make the function fail if its trip argument is greater than 9, because ACPI object names can only be 4 characters long and it does not make sense to even try to evaluate objects with longer names (that argument is guaranteed to be non-negative, because it comes from the thermal code that will not pass negative trip numbers to zone callbacks). Signed-off-by:
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Rafael J. Wysocki authored
The explicit casting from int to unsigned long in int340x_thermal_get_zone_temp() is pointless, becuase the multiplication result is cast back to int by the assignment in the same statement, so drop it. No expected functional impact. Signed-off-by:
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Rafael J. Wysocki authored
Rename local variables int34x_thermal_zone in int340x_thermal_zone_add() and int340x_thermal_zone_remove() to int34x_zone which allows a number of code lines to be shorter and easier to read and adjust some white space for consistency. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
Improve some inconsistent usage of white space in int340x_thermal_zone.c, fix up one coding style issue in it (missing braces around an else branch of a conditional) and while at it replace a !ACPI_FAILURE() check with an equivalent ACPI_SUCCESS() one. No intentional functional impact. Signed-off-by:
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Rafael J. Wysocki authored
It is slightly better to make the ACPI thermal helper functions retrieve the trip point temperature only instead of doing the full trip point initialization, because they are also used for updating some already registered trip points, in which case initializing a new trip just in order to update the temperature of an existing one is somewhat wasteful. Modify the ACPI thermal helpers accordingly and update their users. No intentional functional impact. Signed-off-by:
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- 30 Jan, 2023 1 commit
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Rafael J. Wysocki authored
Merge changes affecting thermal control on Intel platforms for 6.3-rc1: - Consolidate code accessing the Intel TCC (Thermal Control Circuitry) MSRs by introducing library functions for that and making the TCC-related code in thermal drivers use them (Zhang Rui). - Enhance the x86_pkg_temp_thermal driver to support dynamic tjmax changes (Zhang Rui). - Address an "unsigned expression compared with zero" warning in the intel_soc_dts_iosf thermal driver (Yang Li). - Update comments regarding two functions in the Intel Menlow thermal driver (Deming Wang). - Use sysfs_emit_at() instead of scnprintf() in the int340x thermal driver (ye xingchen). - Make the intel_pch thermal driver support the Wellsburg PCH (Tim Zimmermann). - Add trip point initialization helper functions for ACPI-defined trip points and modify two thermal drivers to use them (Rafael Wysocki, Daniel Lezcano). - Modify the intel_pch and processor_thermal_device_pci thermal drivers use generic trip point tables instead of thermal zone trip point callbacks (Daniel Lezcano). - Add production mode attribute sysfs attribute to the int340x thermal driver (Srinivas Pandruvada). - Rework dynamic trip point updates handling and locking in the int340x thermal driver (Rafael Wysocki). - Make the int340x thermal driver use a generic trip points table instead of thermal zone trip point callbacks (Rafael Wysocki, Daniel Lezcano). * thermal-intel: thermal: intel: int340x: Use generic trip points table thermal: intel: int340x: Use zone lock for synchronization thermal: intel: int340x: Rework updating trip points thermal: ACPI: Initialize trips if temperature is out of range thermal: intel: processor_thermal_device_pci: Use generic trip point thermal: intel: int340x: Add production mode attribute thermal: intel: intel_pch: Use generic trip points thermal: ACPI: Add ACPI trip point routines thermal: intel: intel_pch: Add support for Wellsburg PCH thermal: int340x_thermal: Use sysfs_emit_at() instead of scnprintf() thermal: intel: menlow: Update function descriptions thermal: intel: Fix unsigned comparison with less than zero thermal/x86_pkg_temp_thermal: Add support for handling dynamic tjmax thermal/x86_pkg_temp_thermal: Use Intel TCC library thermal/intel/intel_tcc_cooling: Use Intel TCC library thermal/intel/intel_soc_dts_iosf: Use Intel TCC library thermal/int340x/processor_thermal: Use Intel TCC library thermal/intel: Introduce Intel TCC library
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- 27 Jan, 2023 6 commits
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Rafael J. Wysocki authored
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Rafael J. Wysocki authored
Modify int340x_thermal_zone_add() to register the thermal zone along with a trip points table, which allows the trip-related zone callbacks to be dropped, because they are not needed any more. In order to consolidate the code, use ACPI trip library functions to populate generic trip points in int340x_thermal_read_trips() and to update them in int340x_thermal_update_trips(). Signed-off-by:
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Rafael J. Wysocki authored
Because the ->get_trip_temp() and ->get_trip_type() thermal zone callbacks are only invoked from __thermal_zone_get_trip() which is always called by the thermal core under the zone lock, it is sufficient for int340x_thermal_update_trips() to acquire the zone lock for mutual exclusion with those callbacks. Accordingly, modify int340x_thermal_update_trips() to use the zone lock instead of the internal trip_mutex and drop the latter which is not necessary any more. Signed-off-by: -
Rafael J. Wysocki authored
It is generally invalid to change the trip point indices after they have been exposed via sysfs. Moreover, the thermal objects in the ACPI namespace cannot go away and appear on the fly. In practice, the only thing that can happen when the INT3403_PERF_TRIP_POINT_CHANGED notification is sent by the platform firmware is a change of the return values of those thermal objects. For this reason, add a special function for updating the trip point temperatures after re-evaluating the respective ACPI thermal objects and change int3403_notify() to invoke it instead of int340x_thermal_read_trips() that would change the trip point indices on errors. Also remove the locking from the latter, because it is only called before registering the thermal zone and it cannot race with the zone's callbacks. Signed-off-by: -
Rafael J. Wysocki authored
In some cases it is still useful to register a trip point if the temperature returned by the corresponding ACPI thermal object (for example, _HOT) is invalid to start with, because the same ACPI thermal object may start to return a valid temperature after a system configuration change (for example, from an AC power source to battery an vice versa). For this reason, if the ACPI thermal object evaluated by thermal_acpi_trip_init() successfully returns a temperature value that is out of the range of values taken into account, initialize the trip point using THERMAL_TEMP_INVALID as the temperature value instead of returning an error to allow the user of the trip point to decide what to do with it. Also update pch_wpt_add_acpi_psv_trip() to reject trip points with invalid temperature values. Fixes: 7a0e3974 ("thermal: ACPI: Add ACPI trip point routines") Reported-by:
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Rafael J. Wysocki authored
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