- 18 Dec, 2023 9 commits
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Shyam Sundar S K authored
Add amd_pmf prefix to source_as_str() function, so that the function name does not look generic. As this is a helper function make it as non-static so that it can be reused across multiple PMF features. Reviewed-by:
Mario Limonciello <mario.limonciello@amd.com> Signed-off-by:
Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Link: https://lore.kernel.org/r/20231212014705.2017474-10-Shyam-sundar.S-k@amd.comSigned-off-by:
Hans de Goede <hdegoede@redhat.com>
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Shyam Sundar S K authored
PMF driver based on the output actions from the TA can request to update the system states like entering s0i3, lock screen etc. by generating an uevent. Based on the udev rules set in the userspace the event id matching the uevent shall get updated accordingly using the systemctl. Sample udev rules under Documentation/admin-guide/pmf.rst. Reviewed-by:
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Shyam Sundar S K authored
P3T (Peak Package Power Limit) is a metric within the SMU controller that can influence the power limits. Add support from the driver to update P3T limits accordingly. Reviewed-by:
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Shyam Sundar S K authored
PMF driver sends changing inputs from each subystem to TA for evaluating the conditions in the policy binary. Add initial support of plumbing in the PMF driver for Smart PC to get information from other subsystems in the kernel. Reviewed-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by:
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Shyam Sundar S K authored
To sideload pmf policy binaries, the Smart PC Solution Builder provides a debugfs file called "update_policy"; that gets created under a new debugfs directory called "pb" and this new directory has to be associated with existing parent directory for PMF driver called "amd_pmf". In the current code structure, amd_pmf_dbgfs_register() is called after amd_pmf_init_features(). This will not help when the Smart PC builder feature has to be assoicated to the parent directory. Hence change the order of amd_pmf_dbgfs_register() and call it before amd_pmf_init_features() so that when the Smart PC init happens, it has the parent debugfs directory to get itself hooked. Reviewed-by:
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Shyam Sundar S K authored
PMF Policy binary is a encrypted and signed binary that will be part of the BIOS. PMF driver via the ACPI interface checks the existence of Smart PC bit. If the advertised bit is found, PMF driver walks the acpi namespace to find out the policy binary size and the address which has to be passed to the TA during the TA init sequence. The policy binary is comprised of inputs (or the events) and outputs (or the actions). With the PMF ecosystem, OEMs generate the policy binary (or could be multiple binaries) that contains a supported set of inputs and outputs which could be specifically carved out for each usage segment (or for each user also) that could influence the system behavior either by enriching the user experience or/and boost/throttle power limits. Once the TA init command succeeds, the PMF driver sends the changing events in the current environment to the TA for a constant sampling frequency time (the event here could be a lid close or open) and if the policy binary has corresponding action built within it, the TA sends the action for it in the subsequent enact command. If the inputs sent to the TA has no output defined in the policy binary generated by OEMs, there will be no action to be performed by the PMF driver. Example policies: 1) if slider is performance ; set the SPL to 40W Here PMF driver registers with the platform profile interface and when the slider position is changed, PMF driver lets the TA know about this. TA sends back an action to update the Sustained Power Limit (SPL). PMF driver updates this limit via the PMFW mailbox. 2) if user_away ; then lock the system Here PMF driver hooks to the AMD SFH driver to know the user presence and send the inputs to TA and if the condition is met, the TA sends the action of locking the system. PMF driver generates a uevent and based on the udev rule in the userland the system gets locked with systemctl. The intent here is to provide the OEM's to make a policy to lock the system when the user is away ; but the userland can make a choice to ignore it. The OEMs will have an utility to create numerous such policies and the policies shall be reviewed by AMD before signing and encrypting them. Policies are shared between operating systems to have seemless user experience. Since all this action has to happen via the "amdtee" driver, currently there is no caller for it in the kernel which can load the amdtee driver. Without amdtee driver loading onto the system the "tee" calls shall fail from the PMF driver. Hence an explicit MODULE_SOFTDEP has been added to address this. Signed-off-by:
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Shyam Sundar S K authored
In the current code, the metrics table information was required only for auto-mode or CnQF at a given time. Hence keeping the return type of amd_pmf_set_dram_addr() as static made sense. But with the addition of Smart PC builder feature, the metrics table information has to be shared by the Smart PC also and this feature resides outside of core.c. To make amd_pmf_set_dram_addr() visible outside of core.c make it as a non-static function and move the allocation of memory for metrics table from amd_pmf_init_metrics_table() to amd_pmf_set_dram_addr() as amd_pmf_set_dram_addr() is the common function to set the DRAM address. Add a suspend handler that can free up the allocated memory for getting the metrics table information. Reviewed-by:
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Shyam Sundar S K authored
PMF TA (Trusted Application) loads via the TEE environment into the AMD ASP. PMF-TA supports two commands: 1) Init: Initialize the TA with the PMF Smart PC policy binary and start the policy engine. A policy is a combination of inputs and outputs, where; - the inputs are the changing dynamics of the system like the user behaviour, system heuristics etc. - the outputs, which are the actions to be set on the system which lead to better power management and enhanced user experience. PMF driver acts as a central manager in this case to supply the inputs required to the TA (either by getting the information from the other kernel subsystems or from userland) 2) Enact: Enact the output actions from the TA. The action could be applying a new thermal limit to boost/throttle the power limits or change system behavior. Reviewed-by:
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Shyam Sundar S K authored
AMD PMF driver loads the PMF TA (Trusted Application) into the AMD ASP's (AMD Security Processor) TEE (Trusted Execution Environment). PMF Trusted Application is a secured firmware placed under /lib/firmware/amdtee gets loaded only when the TEE environment is initialized. Add the initial code path to build these pipes. Reviewed-by:
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- 14 Dec, 2023 1 commit
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Hans de Goede authored
Immutable branch between pdx86 amd wbrf branch and wifi / amdgpu due for the v6.8 merge window platform-drivers-x86-amd-wbrf-v6.8-1: v6.7-rc1 + AMD WBRF support for merging into the wifi subsys and amdgpu driver for 6.8.
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- 11 Dec, 2023 17 commits
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Ma Jun authored
Due to electrical and mechanical constraints in certain platform designs there may be likely interference of relatively high-powered harmonics of the (G-)DDR memory clocks with local radio module frequency bands used by Wifi 6/6e/7. To mitigate this, AMD has introduced a mechanism that devices can use to notify active use of particular frequencies so that other devices can make relative internal adjustments as necessary to avoid this resonance. Co-developed-by:
Evan Quan <quanliangl@hotmail.com> Signed-off-by:
Ma Jun <Jun.Ma2@amd.com> Reviewed-by:
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Ma Jun authored
Add documentation about AMD's Wifi band RFI mitigation (WBRF) mechanism explaining the theory and how it is used. Signed-off-by:
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Armin Wolf authored
The design of the WMI chardev interface is broken: - it assumes that WMI drivers are not instantiated twice - it offers next to no abstractions, the WMI driver gets a raw byte buffer - it is only used by a single driver, something which is unlikely to change Since the only user (dell-smbios-wmi) has been migrated to his own ioctl interface, remove it. Reviewed-by:
Armin Wolf <W_Armin@gmx.de> Link: https://lore.kernel.org/r/20231210202443.646427-6-W_Armin@gmx.deReviewed-by:
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Armin Wolf authored
The WMI chardev API will be removed in the near future. Reimplement the necessary bits used by this driver so that userspace software depending on it does no break. Signed-off-by:
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Armin Wolf authored
Use devres version of __get_free_pages() to simplify the error handling code. Signed-off-by:
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Armin Wolf authored
Users can already listen to ACPI WMI events through the ACPI netlink interface. The old wmi_notify_debug() interface also uses the deprecated GUID-based interface. Remove it to make the event handling code more readable. Reviewed-by:
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Armin Wolf authored
The functionality of dumping WDG entries is better provided by userspace tools like "fwts wmi", which also does not suffer from garbled printk output caused by pr_cont(). Reviewed-by:
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Hans de Goede authored
Back merge pdx86 fixes into pdx86/for-next for further WMI work depending on some of the fixes. platform-drivers-x86 for v6.7-3 Highlights: - asus-wmi: Solve i8042 filter resource handling, input, and suspend issues - wmi: Skip zero instance WMI blocks to avoid issues with some laptops - mlxbf-bootctl: Differentiate dev/production keys - platform/surface: Correct serdev related return value to avoid leaking errno into userspace - Error checking fixes The following is an automated shortlog grouped by driver: asus-wmi: - Change q500a_i8042_filter() into a generic i8042-filter - disable USB0 hub on ROG Ally before suspend - Filter Volume key presses if also reported via atkbd - Move i8042 filter install to shared asus-wmi code mellanox: - Add null pointer checks for devm_kasprintf() - Check devm_hwmon_device_register_with_groups() return value mlxbf-bootctl: - correctly identify secure boot with development keys surface: aggregator: - fix recv_buf() return value wmi: - Skip blocks with zero instances
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Ilpo Järvinen authored
Remove unused debug code inside #if 0 ... #endif. Signed-off-by:
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Srinivas Pandruvada authored
When a feature is read blocked, don't continue to read uncore information and register with uncore core. When the feature is write blocked, continue to offer read interface but block setting uncore limits. Signed-off-by:
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by:
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Srinivas Pandruvada authored
When a feature is read blocked, don't continue to read SST information and register with SST core. When the feature is write blocked, continue to offer read interface for SST parameters, but don't allow any operation to change state. A state change results from SST level change, feature change or class of service change. Signed-off-by:
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Srinivas Pandruvada authored
Move TPMI ID definitions to common include file. In this way other feature drivers don't have to redefine. Signed-off-by:
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Srinivas Pandruvada authored
Modify the external interface tpmi_get_feature_status() to get read and write blocked instead of locked and disabled. Since auxiliary device is not created when disabled, no use of returning disabled state. Also locked state is not useful as feature driver can't use locked state in a meaningful way. Using read and write state, feature driver can decide which operations to restrict for that feature. Signed-off-by:
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Srinivas Pandruvada authored
If some TPMI features are disabled, don't create auxiliary devices. In this way feature drivers will not load. While creating auxiliary devices, call tpmi_read_feature_status() to check feature state and return if the feature is disabled without creating a device. Signed-off-by:
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Andy Shevchenko authored
'extern' for the functions is not needed, drop it. Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by:
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Uwe Kleine-König authored
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/a6b074b7ee37f3682da4b3f39ea40af97add64c2.1701726190.git.u.kleine-koenig@pengutronix.deReviewed-by:
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Uwe Kleine-König authored
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by:
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- 04 Dec, 2023 13 commits
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Dan Carpenter authored
The spi_new_device() function returns NULL on error, it doesn't return error pointers. Fixes: 70505ea6 ("platform/x86: x86-android-tablets: Add support for SPI device instantiation") Signed-off-by:
Dan Carpenter <dan.carpenter@linaro.org> Link: https://lore.kernel.org/r/4b1b2395-c7c5-44a4-b0b0-6d091c7f46a2@moroto.mountainReviewed-by:
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David E. Box authored
Expose the Die C6 counter on Meteor Lake. Signed-off-by:
David E. Box <david.e.box@linux.intel.com> Reviewed-by:
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David E. Box authored
Add a "die_c6_us_show" debugfs attribute. Reads the counter value using Intel Platform Monitoring Technology (PMT) driver API. This counter is useful for determining the idle residency of CPUs in the compute tile. Also adds a missing forward declaration for punit_ep which was declared in an earlier upstream commit but only used for the first time in this one. Signed-off-by:
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Xi Pardee authored
Add support to read the low power mode requirements for Meteor Lake M and Meteor Lake P. Signed-off-by:
Xi Pardee <xi.pardee@intel.com> Signed-off-by:
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Xi Pardee authored
On supported platforms, the low power mode (LPM) requirements for entering each idle substate are described in Platform Monitoring Technology (PMT) telemetry entries. Provide a function for platform code to attempt to find and read the requirements from the telemetry entries. Signed-off-by:
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Rajvi Jingar authored
Update the substate_requirements attribute to display the requirements for all the PMCs on a package. Signed-off-by:
Rajvi Jingar <rajvi.jingar@linux.intel.com> Signed-off-by:
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David E. Box authored
The PMC SSRAM device contains counters that are structured in Intel Platform Monitoring Technology (PMT) telemetry regions. Look for and register these telemetry regions from the driver so that they may be read using the Intel PMT ABI. Signed-off-by:
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David E. Box authored
Instead of checking for a NULL regbase, use the return value from pmc_core_ssram_init() to check if PMC discovery was successful. If not, use the legacy enumeration method (which only works for the primary PMC). Signed-off-by:
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David E. Box authored
Clean up the code handling SSRAM discovery. Handle all resource allocation and cleanup in pmc_core_ssram_get_pmc(). Return the error status from this function but only fail the init if we fail to discover the primary PMC. Signed-off-by:
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David E. Box authored
Currently, if the PMC SSRAM initialization fails, no error is returned and the only indication is that a PMC device has not been created. Instead, allow an error to be returned and handled directly by the caller. Signed-off-by:
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Xi Pardee authored
In order to setup a table of low power mode requirements for Meteor Lake, pmc_core_get_low_power_modes() will need to be run from platform init code so that the enabled modes are known, allowing the use of the pmc_for_each_mode helper. Make the function global and call it from the platform init code. Signed-off-by:
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David E. Box authored
Export symbols to allow access to Intel PMT Telemetry data on available devices. Provides APIs to search, register, and read telemetry using a kref managed pointer that serves as a handle to a telemetry endpoint. To simplify searching for present devices, have the IDA start at 1 instead of 0 so that 0 can be used to indicate end of search. Signed-off-by:
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David E. Box authored
The PMT header is passed to several functions. Instead, store the header in struct intel_pmt_entry which is also passed to these functions and shorten the argument list. This simplifies the calls in preparation for later changes. While here also perform a newline cleanup. Signed-off-by:
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