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![Linus Torvalds](/assets/img/avatar_default.png)
- Add a debugfs-based interface for interacting with the ACPICA's AML debugger introduced in the previous cycle and a new user space tool for that, fix some bugs related to the AML debugger and clean up the code in question (Lv Zheng, Dan Carpenter, Colin Ian King, Markus Elfring). - Update ACPICA to upstream revision 20151218 including a number of fixes and cleanups in the ACPICA core (Bob Moore, Lv Zheng, Labbe Corentin, Prarit Bhargava, Colin Ian King, David E Box, Rafael Wysocki). In particular, the previously added erroneous support for the _SUB object is dropped, the concatenate operator will support all ACPI objects now, the Debug Object handling is improved, the SuperName handling of parameters being control methods is fixed, the ObjectType operator handling is updated to follow ACPI 5.0A and the handling of CondRefOf and RefOf is updated accordingly, module-level code will be executed after loading each ACPI table now (instead of being run once after all tables containing AML have been loaded), the Operation Region handlers management is updated to fix some reported problems and a the ACPICA code in the kernel is more in line with the upstream now. - Update the ACPI backlight driver to provide information on whether or not it will generate key-presses for brightness change hotkeys and update some platform drivers (dell-wmi, thinkpad_acpi) to use that information to avoid sending double key-events to users pace for these, add new ACPI backlight quirks (Hans de Goede, Aaron Lu, Adrien Schildknecht). - Improve the ACPI handling of interrupt GPIOs (Christophe Ricard). - Fix the handling of the list of device IDs of device objects found in the ACPI namespace and add a helper for checking if there is a device object for a given device ID (Lukas Wunner). - Change the logic in the ACPI namespace scanning code to create struct acpi_device objects for all ACPI device objects found in the namespace even if _STA fails for them which helps to avoid device enumeration problems on Microsoft Surface 3 (Aaron Lu). - Add support for the APM X-Gene ACPI I2C device to the ACPI driver for AMD SoCs (Loc Ho). - Fix the long-standing issue with the DMA controller on Intel SoCs where ACPI tables have no power management support for the DMA controller itself, but it can be powered off automatically when the last (other) device on the SoC is powered off via ACPI and clean up the ACPI driver for Intel SoCs (acpi-lpss) after previous attempts to fix that problem (Andy Shevchenko). - Assorted ACPI fixes and cleanups (Andy Lutomirski, Colin Ian King, Javier Martinez Canillas, Ken Xue, Mathias Krause, Rafael Wysocki, Sinan Kaya). - Update the device properties framework for better handling of built-in properties, add support for built-in properties to the platform bus type, update the MFD subsystem's handling of device properties and add support for passing default configuration data as device properties to the intel-lpss MFD drivers, convert the designware I2C driver to use the unified device properties API and add a fallback mechanism for using default built-in properties if the platform firmware fails to provide the properties as expected by drivers (Andy Shevchenko, Mika Westerberg, Heikki Krogerus, Andrew Morton). - Add new Device Tree bindings to the Operating Performance Points (OPP) framework and update the exynos4412 DT binding accordingly, introduce debugfs support for the OPP framework (Viresh Kumar, Bartlomiej Zolnierkiewicz). - Migrate the mt8173 cpufreq driver to the new OPP bindings (Pi-Cheng Chen). - Update the cpufreq core to make the handling of governors more efficient, especially on systems where policy objects are shared between multiple CPUs (Viresh Kumar, Rafael Wysocki). - Fix cpufreq governor handling on configurations with CONFIG_HZ_PERIODIC set (Chen Yu). - Clean up the cpufreq core code related to the boost sysfs knob support and update the ACPI cpufreq driver accordingly (Rafael Wysocki). - Add a new cpufreq driver for ST platforms and corresponding Device Tree bindings (Lee Jones). - Update the intel_pstate driver to allow the P-state selection algorithm used by it to depend on the CPU ID of the processor it is running on, make it use a special P-state selection algorithm (with an IO wait time compensation tweak) on Atom CPUs based on the Airmont and Silvermont cores so as to reduce their energy consumption and improve intel_pstate documentation (Philippe Longepe, Srinivas Pandruvada). - Update the cpufreq-dt driver to support registering cooling devices that use the (P * V^2 * f) dynamic power draw formula where V is the voltage, f is the frequency and P is a constant coefficient provided by Device Tree and update the arm_big_little cpufreq driver to use that support (Punit Agrawal). - Assorted cpufreq driver (cpufreq-dt, qoriq, pcc-cpufreq, blackfin-cpufreq) updates (Andrzej Hajda, Hongtao Jia, Jacob Tanenbaum, Markus Elfring). - cpuidle core tweaks related to polling and measured_us calculation (Rik van Riel). - Removal of modularity from a few cpuidle drivers (clps711x, ux500, exynos) that cannot be built as modules in practice (Paul Gortmaker). - PM core update to prevent devices from being probed during system suspend/resume which is generally problematic and may lead to inconsistent behavior (Grygorii Strashko). - Assorted updates of the PM core and related code (Julia Lawall, Manuel Pégourié-Gonnard, Maruthi Bayyavarapu, Rafael Wysocki, Ulf Hansson). - PNP bus type updates (Christophe Le Roy, Heiner Kallweit). - PCI PM code cleanups (Jarkko Nikula, Julia Lawall). - cpupower tool updates (Jacob Tanenbaum, Thomas Renninger). / -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAABCAAGBQJWlZOmAAoJEILEb/54YlRxxtEP/ioR0xMOJQcWd5F6Oyj1PZsx vJeXsmL3fXFAlr6riaE966QqclhUTDhhex3kbFmNQvM8WukxOmBWy5UMSjRg2UmM PHrogc/KrrE+xb8hjGZPgqVr+/L9O3C6lZmM+AUciT0hWZJckYgRh5TpHb1xN/Kx MptvtSXRBM62LWytug+EwA4SHt7OFS0yJ/CI1pKvODVtLaYDIPI5k+4ilPU7y6Be vfoysvmUozNTEYxgPOPXfoQqW2P5t2df32Re31uKtLenLXbc8KW0wIYm24DXgSK6 V/TyDVZTNaZk6OpTqWrjqFbedpGvcBpViwYEY7yv33GDCpXGdHQl3ga+Jy6PAUem 7oGDZtA+5Di/8szhH/wSdpXwSaKEeUdFiaj6Uw2MAwiY4wzv5+WmLRcuIjQFDAxT elrTbQhAgaMlMsUkQ9NV4GC7ByUeeQX2NpCielsHngOQgKdYRQHyYUgGXc2Wgjdq UnVrIWRHzXSED0RtPI7IT0Y4PSxkM9UoSEiVUwt3srCue2CFzuENs23qaDgAzeDa 5uwnDl4RhI2BrLVT1WhioIFgFE5Yh5Xx6dSGC+jcU2ss8r2oN6DdUbqOzWAa1iR4 sFhgwwwizpCCfB6pSqEuDdg8W56HjvE9kQY9kcTPPNPbktL0VImC+iiSN/CgZJv9 MH9NbQM8uHkfNcpjsN7V =OlYA -----END PGP SIGNATURE----- Merge tag 'pm+acpi-4.5-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull oower management and ACPI updates from Rafael Wysocki: "As far as the number of commits goes, ACPICA takes the lead this time, followed by cpufreq and the device properties framework changes. The most significant new feature is the debugfs-based interface to the ACPICA's AML debugger added in the previous cycle and a new user space tool for accessing it. On the cpufreq front, the core is updated to handle governors more efficiently, particularly on systems where a single cpufreq policy object is shared between multiple CPUs, and there are quite a few changes in drivers (intel_pstate, cpufreq-dt etc). The device properties framework is updated to handle built-in (ie included in the kernel itself) device properties better, among other things by adding a fallback mechanism that will allow drivers to provide default properties to be used in case the plaform firmware doesn't provide the properties expected by them. The Operating Performance Points (OPP) framework gets new DT bindings and debugfs support. A new cpufreq driver for ST platforms is added and the ACPI driver for AMD SoCs will now support the APM X-Gene ACPI I2C device. The rest is mostly fixes and cleanups all over. Specifics: - Add a debugfs-based interface for interacting with the ACPICA's AML debugger introduced in the previous cycle and a new user space tool for that, fix some bugs related to the AML debugger and clean up the code in question (Lv Zheng, Dan Carpenter, Colin Ian King, Markus Elfring). - Update ACPICA to upstream revision 20151218 including a number of fixes and cleanups in the ACPICA core (Bob Moore, Lv Zheng, Labbe Corentin, Prarit Bhargava, Colin Ian King, David E Box, Rafael Wysocki). In particular, the previously added erroneous support for the _SUB object is dropped, the concatenate operator will support all ACPI objects now, the Debug Object handling is improved, the SuperName handling of parameters being control methods is fixed, the ObjectType operator handling is updated to follow ACPI 5.0A and the handling of CondRefOf and RefOf is updated accordingly, module- level code will be executed after loading each ACPI table now (instead of being run once after all tables containing AML have been loaded), the Operation Region handlers management is updated to fix some reported problems and a the ACPICA code in the kernel is more in line with the upstream now. - Update the ACPI backlight driver to provide information on whether or not it will generate key-presses for brightness change hotkeys and update some platform drivers (dell-wmi, thinkpad_acpi) to use that information to avoid sending double key-events to users pace for these, add new ACPI backlight quirks (Hans de Goede, Aaron Lu, Adrien Schildknecht). - Improve the ACPI handling of interrupt GPIOs (Christophe Ricard). - Fix the handling of the list of device IDs of device objects found in the ACPI namespace and add a helper for checking if there is a device object for a given device ID (Lukas Wunner). - Change the logic in the ACPI namespace scanning code to create struct acpi_device objects for all ACPI device objects found in the namespace even if _STA fails for them which helps to avoid device enumeration problems on Microsoft Surface 3 (Aaron Lu). - Add support for the APM X-Gene ACPI I2C device to the ACPI driver for AMD SoCs (Loc Ho). - Fix the long-standing issue with the DMA controller on Intel SoCs where ACPI tables have no power management support for the DMA controller itself, but it can be powered off automatically when the last (other) device on the SoC is powered off via ACPI and clean up the ACPI driver for Intel SoCs (acpi-lpss) after previous attempts to fix that problem (Andy Shevchenko). - Assorted ACPI fixes and cleanups (Andy Lutomirski, Colin Ian King, Javier Martinez Canillas, Ken Xue, Mathias Krause, Rafael Wysocki, Sinan Kaya). - Update the device properties framework for better handling of built-in properties, add support for built-in properties to the platform bus type, update the MFD subsystem's handling of device properties and add support for passing default configuration data as device properties to the intel-lpss MFD drivers, convert the designware I2C driver to use the unified device properties API and add a fallback mechanism for using default built-in properties if the platform firmware fails to provide the properties as expected by drivers (Andy Shevchenko, Mika Westerberg, Heikki Krogerus, Andrew Morton). - Add new Device Tree bindings to the Operating Performance Points (OPP) framework and update the exynos4412 DT binding accordingly, introduce debugfs support for the OPP framework (Viresh Kumar, Bartlomiej Zolnierkiewicz). - Migrate the mt8173 cpufreq driver to the new OPP bindings (Pi-Cheng Chen). - Update the cpufreq core to make the handling of governors more efficient, especially on systems where policy objects are shared between multiple CPUs (Viresh Kumar, Rafael Wysocki). - Fix cpufreq governor handling on configurations with CONFIG_HZ_PERIODIC set (Chen Yu). - Clean up the cpufreq core code related to the boost sysfs knob support and update the ACPI cpufreq driver accordingly (Rafael Wysocki). - Add a new cpufreq driver for ST platforms and corresponding Device Tree bindings (Lee Jones). - Update the intel_pstate driver to allow the P-state selection algorithm used by it to depend on the CPU ID of the processor it is running on, make it use a special P-state selection algorithm (with an IO wait time compensation tweak) on Atom CPUs based on the Airmont and Silvermont cores so as to reduce their energy consumption and improve intel_pstate documentation (Philippe Longepe, Srinivas Pandruvada). - Update the cpufreq-dt driver to support registering cooling devices that use the (P * V^2 * f) dynamic power draw formula where V is the voltage, f is the frequency and P is a constant coefficient provided by Device Tree and update the arm_big_little cpufreq driver to use that support (Punit Agrawal). - Assorted cpufreq driver (cpufreq-dt, qoriq, pcc-cpufreq, blackfin-cpufreq) updates (Andrzej Hajda, Hongtao Jia, Jacob Tanenbaum, Markus Elfring). - cpuidle core tweaks related to polling and measured_us calculation (Rik van Riel). - Removal of modularity from a few cpuidle drivers (clps711x, ux500, exynos) that cannot be built as modules in practice (Paul Gortmaker). - PM core update to prevent devices from being probed during system suspend/resume which is generally problematic and may lead to inconsistent behavior (Grygorii Strashko). - Assorted updates of the PM core and related code (Julia Lawall, Manuel Pégourié-Gonnard, Maruthi Bayyavarapu, Rafael Wysocki, Ulf Hansson). - PNP bus type updates (Christophe Le Roy, Heiner Kallweit). - PCI PM code cleanups (Jarkko Nikula, Julia Lawall). - cpupower tool updates (Jacob Tanenbaum, Thomas Renninger)" * tag 'pm+acpi-4.5-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (177 commits) PM / clk: don't leave clocks enabled when driver not bound i2c: dw: Add APM X-Gene ACPI I2C device support ACPI / APD: Add APM X-Gene ACPI I2C device support ACPI / LPSS: change 'does not have' to 'has' in comment Revert "dmaengine: dw: platform: provide platform data for Intel" dmaengine: dw: return immediately from IRQ when DMA isn't in use dmaengine: dw: platform: power on device on shutdown ACPI / LPSS: override power state for LPSS DMA device PM / OPP: Use snprintf() instead of sprintf() Documentation: cpufreq: intel_pstate: enhance documentation ACPI, PCI, irq: remove redundant check for null string pointer ACPI / video: driver must be registered before checking for keypresses cpufreq-dt: fix handling regulator_get_voltage() result cpufreq: governor: Fix negative idle_time when configured with CONFIG_HZ_PERIODIC PM / sleep: Add support for read-only sysfs attributes ACPI: Fix white space in a structure definition ACPI / SBS: fix inconsistent indenting inside if statement PNP: respect PNP_DRIVER_RES_DO_NOT_CHANGE when detaching ACPI / PNP: constify device IDs ACPI / PCI: Simplify acpi_penalize_isa_irq() ...
758 lines
20 KiB
C
758 lines
20 KiB
C
/*
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* File: pci-acpi.c
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* Purpose: Provide PCI support in ACPI
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*
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* Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com>
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* Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com>
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* Copyright (C) 2004 Intel Corp.
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/irqdomain.h>
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#include <linux/pci.h>
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#include <linux/msi.h>
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#include <linux/pci_hotplug.h>
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#include <linux/module.h>
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#include <linux/pci-aspm.h>
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#include <linux/pci-acpi.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_qos.h>
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#include "pci.h"
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/*
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* The UUID is defined in the PCI Firmware Specification available here:
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* https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf
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*/
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const u8 pci_acpi_dsm_uuid[] = {
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0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d,
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0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d
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};
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phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
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{
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acpi_status status = AE_NOT_EXIST;
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unsigned long long mcfg_addr;
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if (handle)
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status = acpi_evaluate_integer(handle, METHOD_NAME__CBA,
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NULL, &mcfg_addr);
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if (ACPI_FAILURE(status))
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return 0;
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return (phys_addr_t)mcfg_addr;
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}
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static acpi_status decode_type0_hpx_record(union acpi_object *record,
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struct hotplug_params *hpx)
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{
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int i;
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union acpi_object *fields = record->package.elements;
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u32 revision = fields[1].integer.value;
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switch (revision) {
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case 1:
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if (record->package.count != 6)
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return AE_ERROR;
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for (i = 2; i < 6; i++)
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if (fields[i].type != ACPI_TYPE_INTEGER)
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return AE_ERROR;
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hpx->t0 = &hpx->type0_data;
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hpx->t0->revision = revision;
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hpx->t0->cache_line_size = fields[2].integer.value;
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hpx->t0->latency_timer = fields[3].integer.value;
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hpx->t0->enable_serr = fields[4].integer.value;
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hpx->t0->enable_perr = fields[5].integer.value;
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break;
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default:
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printk(KERN_WARNING
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"%s: Type 0 Revision %d record not supported\n",
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__func__, revision);
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return AE_ERROR;
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}
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return AE_OK;
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}
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static acpi_status decode_type1_hpx_record(union acpi_object *record,
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struct hotplug_params *hpx)
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{
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int i;
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union acpi_object *fields = record->package.elements;
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u32 revision = fields[1].integer.value;
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switch (revision) {
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case 1:
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if (record->package.count != 5)
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return AE_ERROR;
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for (i = 2; i < 5; i++)
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if (fields[i].type != ACPI_TYPE_INTEGER)
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return AE_ERROR;
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hpx->t1 = &hpx->type1_data;
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hpx->t1->revision = revision;
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hpx->t1->max_mem_read = fields[2].integer.value;
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hpx->t1->avg_max_split = fields[3].integer.value;
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hpx->t1->tot_max_split = fields[4].integer.value;
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break;
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default:
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printk(KERN_WARNING
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"%s: Type 1 Revision %d record not supported\n",
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__func__, revision);
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return AE_ERROR;
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}
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return AE_OK;
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}
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static acpi_status decode_type2_hpx_record(union acpi_object *record,
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struct hotplug_params *hpx)
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{
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int i;
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union acpi_object *fields = record->package.elements;
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u32 revision = fields[1].integer.value;
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switch (revision) {
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case 1:
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if (record->package.count != 18)
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return AE_ERROR;
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for (i = 2; i < 18; i++)
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if (fields[i].type != ACPI_TYPE_INTEGER)
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return AE_ERROR;
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hpx->t2 = &hpx->type2_data;
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hpx->t2->revision = revision;
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hpx->t2->unc_err_mask_and = fields[2].integer.value;
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hpx->t2->unc_err_mask_or = fields[3].integer.value;
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hpx->t2->unc_err_sever_and = fields[4].integer.value;
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hpx->t2->unc_err_sever_or = fields[5].integer.value;
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hpx->t2->cor_err_mask_and = fields[6].integer.value;
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hpx->t2->cor_err_mask_or = fields[7].integer.value;
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hpx->t2->adv_err_cap_and = fields[8].integer.value;
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hpx->t2->adv_err_cap_or = fields[9].integer.value;
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hpx->t2->pci_exp_devctl_and = fields[10].integer.value;
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hpx->t2->pci_exp_devctl_or = fields[11].integer.value;
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hpx->t2->pci_exp_lnkctl_and = fields[12].integer.value;
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hpx->t2->pci_exp_lnkctl_or = fields[13].integer.value;
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hpx->t2->sec_unc_err_sever_and = fields[14].integer.value;
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hpx->t2->sec_unc_err_sever_or = fields[15].integer.value;
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hpx->t2->sec_unc_err_mask_and = fields[16].integer.value;
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hpx->t2->sec_unc_err_mask_or = fields[17].integer.value;
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break;
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default:
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printk(KERN_WARNING
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"%s: Type 2 Revision %d record not supported\n",
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__func__, revision);
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return AE_ERROR;
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}
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return AE_OK;
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}
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static acpi_status acpi_run_hpx(acpi_handle handle, struct hotplug_params *hpx)
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{
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acpi_status status;
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *package, *record, *fields;
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u32 type;
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int i;
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/* Clear the return buffer with zeros */
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memset(hpx, 0, sizeof(struct hotplug_params));
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status = acpi_evaluate_object(handle, "_HPX", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return status;
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package = (union acpi_object *)buffer.pointer;
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if (package->type != ACPI_TYPE_PACKAGE) {
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status = AE_ERROR;
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goto exit;
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}
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for (i = 0; i < package->package.count; i++) {
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record = &package->package.elements[i];
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if (record->type != ACPI_TYPE_PACKAGE) {
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status = AE_ERROR;
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goto exit;
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}
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fields = record->package.elements;
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if (fields[0].type != ACPI_TYPE_INTEGER ||
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fields[1].type != ACPI_TYPE_INTEGER) {
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status = AE_ERROR;
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goto exit;
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}
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type = fields[0].integer.value;
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switch (type) {
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case 0:
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status = decode_type0_hpx_record(record, hpx);
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if (ACPI_FAILURE(status))
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goto exit;
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break;
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case 1:
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status = decode_type1_hpx_record(record, hpx);
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if (ACPI_FAILURE(status))
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goto exit;
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break;
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case 2:
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status = decode_type2_hpx_record(record, hpx);
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if (ACPI_FAILURE(status))
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goto exit;
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break;
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default:
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printk(KERN_ERR "%s: Type %d record not supported\n",
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__func__, type);
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status = AE_ERROR;
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goto exit;
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}
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}
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exit:
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kfree(buffer.pointer);
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return status;
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}
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static acpi_status acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
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{
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acpi_status status;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *package, *fields;
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int i;
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memset(hpp, 0, sizeof(struct hotplug_params));
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status = acpi_evaluate_object(handle, "_HPP", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return status;
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package = (union acpi_object *) buffer.pointer;
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if (package->type != ACPI_TYPE_PACKAGE ||
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package->package.count != 4) {
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status = AE_ERROR;
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goto exit;
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}
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fields = package->package.elements;
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for (i = 0; i < 4; i++) {
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if (fields[i].type != ACPI_TYPE_INTEGER) {
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status = AE_ERROR;
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goto exit;
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}
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}
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hpp->t0 = &hpp->type0_data;
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hpp->t0->revision = 1;
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hpp->t0->cache_line_size = fields[0].integer.value;
|
|
hpp->t0->latency_timer = fields[1].integer.value;
|
|
hpp->t0->enable_serr = fields[2].integer.value;
|
|
hpp->t0->enable_perr = fields[3].integer.value;
|
|
|
|
exit:
|
|
kfree(buffer.pointer);
|
|
return status;
|
|
}
|
|
|
|
/* pci_get_hp_params
|
|
*
|
|
* @dev - the pci_dev for which we want parameters
|
|
* @hpp - allocated by the caller
|
|
*/
|
|
int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp)
|
|
{
|
|
acpi_status status;
|
|
acpi_handle handle, phandle;
|
|
struct pci_bus *pbus;
|
|
|
|
if (acpi_pci_disabled)
|
|
return -ENODEV;
|
|
|
|
handle = NULL;
|
|
for (pbus = dev->bus; pbus; pbus = pbus->parent) {
|
|
handle = acpi_pci_get_bridge_handle(pbus);
|
|
if (handle)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* _HPP settings apply to all child buses, until another _HPP is
|
|
* encountered. If we don't find an _HPP for the input pci dev,
|
|
* look for it in the parent device scope since that would apply to
|
|
* this pci dev.
|
|
*/
|
|
while (handle) {
|
|
status = acpi_run_hpx(handle, hpp);
|
|
if (ACPI_SUCCESS(status))
|
|
return 0;
|
|
status = acpi_run_hpp(handle, hpp);
|
|
if (ACPI_SUCCESS(status))
|
|
return 0;
|
|
if (acpi_is_root_bridge(handle))
|
|
break;
|
|
status = acpi_get_parent(handle, &phandle);
|
|
if (ACPI_FAILURE(status))
|
|
break;
|
|
handle = phandle;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_get_hp_params);
|
|
|
|
/**
|
|
* pci_acpi_wake_bus - Root bus wakeup notification fork function.
|
|
* @work: Work item to handle.
|
|
*/
|
|
static void pci_acpi_wake_bus(struct work_struct *work)
|
|
{
|
|
struct acpi_device *adev;
|
|
struct acpi_pci_root *root;
|
|
|
|
adev = container_of(work, struct acpi_device, wakeup.context.work);
|
|
root = acpi_driver_data(adev);
|
|
pci_pme_wakeup_bus(root->bus);
|
|
}
|
|
|
|
/**
|
|
* pci_acpi_wake_dev - PCI device wakeup notification work function.
|
|
* @handle: ACPI handle of a device the notification is for.
|
|
* @work: Work item to handle.
|
|
*/
|
|
static void pci_acpi_wake_dev(struct work_struct *work)
|
|
{
|
|
struct acpi_device_wakeup_context *context;
|
|
struct pci_dev *pci_dev;
|
|
|
|
context = container_of(work, struct acpi_device_wakeup_context, work);
|
|
pci_dev = to_pci_dev(context->dev);
|
|
|
|
if (pci_dev->pme_poll)
|
|
pci_dev->pme_poll = false;
|
|
|
|
if (pci_dev->current_state == PCI_D3cold) {
|
|
pci_wakeup_event(pci_dev);
|
|
pm_runtime_resume(&pci_dev->dev);
|
|
return;
|
|
}
|
|
|
|
/* Clear PME Status if set. */
|
|
if (pci_dev->pme_support)
|
|
pci_check_pme_status(pci_dev);
|
|
|
|
pci_wakeup_event(pci_dev);
|
|
pm_runtime_resume(&pci_dev->dev);
|
|
|
|
pci_pme_wakeup_bus(pci_dev->subordinate);
|
|
}
|
|
|
|
/**
|
|
* pci_acpi_add_bus_pm_notifier - Register PM notifier for root PCI bus.
|
|
* @dev: PCI root bridge ACPI device.
|
|
*/
|
|
acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev)
|
|
{
|
|
return acpi_add_pm_notifier(dev, NULL, pci_acpi_wake_bus);
|
|
}
|
|
|
|
/**
|
|
* pci_acpi_add_pm_notifier - Register PM notifier for given PCI device.
|
|
* @dev: ACPI device to add the notifier for.
|
|
* @pci_dev: PCI device to check for the PME status if an event is signaled.
|
|
*/
|
|
acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
|
|
struct pci_dev *pci_dev)
|
|
{
|
|
return acpi_add_pm_notifier(dev, &pci_dev->dev, pci_acpi_wake_dev);
|
|
}
|
|
|
|
/*
|
|
* _SxD returns the D-state with the highest power
|
|
* (lowest D-state number) supported in the S-state "x".
|
|
*
|
|
* If the devices does not have a _PRW
|
|
* (Power Resources for Wake) supporting system wakeup from "x"
|
|
* then the OS is free to choose a lower power (higher number
|
|
* D-state) than the return value from _SxD.
|
|
*
|
|
* But if _PRW is enabled at S-state "x", the OS
|
|
* must not choose a power lower than _SxD --
|
|
* unless the device has an _SxW method specifying
|
|
* the lowest power (highest D-state number) the device
|
|
* may enter while still able to wake the system.
|
|
*
|
|
* ie. depending on global OS policy:
|
|
*
|
|
* if (_PRW at S-state x)
|
|
* choose from highest power _SxD to lowest power _SxW
|
|
* else // no _PRW at S-state x
|
|
* choose highest power _SxD or any lower power
|
|
*/
|
|
|
|
static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
|
|
{
|
|
int acpi_state, d_max;
|
|
|
|
if (pdev->no_d3cold)
|
|
d_max = ACPI_STATE_D3_HOT;
|
|
else
|
|
d_max = ACPI_STATE_D3_COLD;
|
|
acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max);
|
|
if (acpi_state < 0)
|
|
return PCI_POWER_ERROR;
|
|
|
|
switch (acpi_state) {
|
|
case ACPI_STATE_D0:
|
|
return PCI_D0;
|
|
case ACPI_STATE_D1:
|
|
return PCI_D1;
|
|
case ACPI_STATE_D2:
|
|
return PCI_D2;
|
|
case ACPI_STATE_D3_HOT:
|
|
return PCI_D3hot;
|
|
case ACPI_STATE_D3_COLD:
|
|
return PCI_D3cold;
|
|
}
|
|
return PCI_POWER_ERROR;
|
|
}
|
|
|
|
static bool acpi_pci_power_manageable(struct pci_dev *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
|
|
return adev ? acpi_device_power_manageable(adev) : false;
|
|
}
|
|
|
|
static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
|
|
static const u8 state_conv[] = {
|
|
[PCI_D0] = ACPI_STATE_D0,
|
|
[PCI_D1] = ACPI_STATE_D1,
|
|
[PCI_D2] = ACPI_STATE_D2,
|
|
[PCI_D3hot] = ACPI_STATE_D3_HOT,
|
|
[PCI_D3cold] = ACPI_STATE_D3_COLD,
|
|
};
|
|
int error = -EINVAL;
|
|
|
|
/* If the ACPI device has _EJ0, ignore the device */
|
|
if (!adev || acpi_has_method(adev->handle, "_EJ0"))
|
|
return -ENODEV;
|
|
|
|
switch (state) {
|
|
case PCI_D3cold:
|
|
if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) ==
|
|
PM_QOS_FLAGS_ALL) {
|
|
error = -EBUSY;
|
|
break;
|
|
}
|
|
case PCI_D0:
|
|
case PCI_D1:
|
|
case PCI_D2:
|
|
case PCI_D3hot:
|
|
error = acpi_device_set_power(adev, state_conv[state]);
|
|
}
|
|
|
|
if (!error)
|
|
dev_dbg(&dev->dev, "power state changed by ACPI to %s\n",
|
|
acpi_power_state_string(state_conv[state]));
|
|
|
|
return error;
|
|
}
|
|
|
|
static bool acpi_pci_can_wakeup(struct pci_dev *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
|
|
return adev ? acpi_device_can_wakeup(adev) : false;
|
|
}
|
|
|
|
static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable)
|
|
{
|
|
while (bus->parent) {
|
|
if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable))
|
|
return;
|
|
bus = bus->parent;
|
|
}
|
|
|
|
/* We have reached the root bus. */
|
|
if (bus->bridge)
|
|
acpi_pm_device_sleep_wake(bus->bridge, enable);
|
|
}
|
|
|
|
static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
|
|
{
|
|
if (acpi_pci_can_wakeup(dev))
|
|
return acpi_pm_device_sleep_wake(&dev->dev, enable);
|
|
|
|
acpi_pci_propagate_wakeup_enable(dev->bus, enable);
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
|
|
{
|
|
while (bus->parent) {
|
|
struct pci_dev *bridge = bus->self;
|
|
|
|
if (bridge->pme_interrupt)
|
|
return;
|
|
if (!acpi_pm_device_run_wake(&bridge->dev, enable))
|
|
return;
|
|
bus = bus->parent;
|
|
}
|
|
|
|
/* We have reached the root bus. */
|
|
if (bus->bridge)
|
|
acpi_pm_device_run_wake(bus->bridge, enable);
|
|
}
|
|
|
|
static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
|
|
{
|
|
/*
|
|
* Per PCI Express Base Specification Revision 2.0 section
|
|
* 5.3.3.2 Link Wakeup, platform support is needed for D3cold
|
|
* waking up to power on the main link even if there is PME
|
|
* support for D3cold
|
|
*/
|
|
if (dev->pme_interrupt && !dev->runtime_d3cold)
|
|
return 0;
|
|
|
|
if (!acpi_pm_device_run_wake(&dev->dev, enable))
|
|
return 0;
|
|
|
|
acpi_pci_propagate_run_wake(dev->bus, enable);
|
|
return 0;
|
|
}
|
|
|
|
static bool acpi_pci_need_resume(struct pci_dev *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
|
|
|
|
if (!adev || !acpi_device_power_manageable(adev))
|
|
return false;
|
|
|
|
if (device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count)
|
|
return true;
|
|
|
|
if (acpi_target_system_state() == ACPI_STATE_S0)
|
|
return false;
|
|
|
|
return !!adev->power.flags.dsw_present;
|
|
}
|
|
|
|
static const struct pci_platform_pm_ops acpi_pci_platform_pm = {
|
|
.is_manageable = acpi_pci_power_manageable,
|
|
.set_state = acpi_pci_set_power_state,
|
|
.choose_state = acpi_pci_choose_state,
|
|
.sleep_wake = acpi_pci_sleep_wake,
|
|
.run_wake = acpi_pci_run_wake,
|
|
.need_resume = acpi_pci_need_resume,
|
|
};
|
|
|
|
void acpi_pci_add_bus(struct pci_bus *bus)
|
|
{
|
|
union acpi_object *obj;
|
|
struct pci_host_bridge *bridge;
|
|
|
|
if (acpi_pci_disabled || !bus->bridge)
|
|
return;
|
|
|
|
acpi_pci_slot_enumerate(bus);
|
|
acpiphp_enumerate_slots(bus);
|
|
|
|
/*
|
|
* For a host bridge, check its _DSM for function 8 and if
|
|
* that is available, mark it in pci_host_bridge.
|
|
*/
|
|
if (!pci_is_root_bus(bus))
|
|
return;
|
|
|
|
obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), pci_acpi_dsm_uuid, 3,
|
|
RESET_DELAY_DSM, NULL);
|
|
if (!obj)
|
|
return;
|
|
|
|
if (obj->type == ACPI_TYPE_INTEGER && obj->integer.value == 1) {
|
|
bridge = pci_find_host_bridge(bus);
|
|
bridge->ignore_reset_delay = 1;
|
|
}
|
|
ACPI_FREE(obj);
|
|
}
|
|
|
|
void acpi_pci_remove_bus(struct pci_bus *bus)
|
|
{
|
|
if (acpi_pci_disabled || !bus->bridge)
|
|
return;
|
|
|
|
acpiphp_remove_slots(bus);
|
|
acpi_pci_slot_remove(bus);
|
|
}
|
|
|
|
/* ACPI bus type */
|
|
static struct acpi_device *acpi_pci_find_companion(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
bool check_children;
|
|
u64 addr;
|
|
|
|
check_children = pci_is_bridge(pci_dev);
|
|
/* Please ref to ACPI spec for the syntax of _ADR */
|
|
addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
|
|
return acpi_find_child_device(ACPI_COMPANION(dev->parent), addr,
|
|
check_children);
|
|
}
|
|
|
|
/**
|
|
* pci_acpi_optimize_delay - optimize PCI D3 and D3cold delay from ACPI
|
|
* @pdev: the PCI device whose delay is to be updated
|
|
* @handle: ACPI handle of this device
|
|
*
|
|
* Update the d3_delay and d3cold_delay of a PCI device from the ACPI _DSM
|
|
* control method of either the device itself or the PCI host bridge.
|
|
*
|
|
* Function 8, "Reset Delay," applies to the entire hierarchy below a PCI
|
|
* host bridge. If it returns one, the OS may assume that all devices in
|
|
* the hierarchy have already completed power-on reset delays.
|
|
*
|
|
* Function 9, "Device Readiness Durations," applies only to the object
|
|
* where it is located. It returns delay durations required after various
|
|
* events if the device requires less time than the spec requires. Delays
|
|
* from this function take precedence over the Reset Delay function.
|
|
*
|
|
* These _DSM functions are defined by the draft ECN of January 28, 2014,
|
|
* titled "ACPI additions for FW latency optimizations."
|
|
*/
|
|
static void pci_acpi_optimize_delay(struct pci_dev *pdev,
|
|
acpi_handle handle)
|
|
{
|
|
struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus);
|
|
int value;
|
|
union acpi_object *obj, *elements;
|
|
|
|
if (bridge->ignore_reset_delay)
|
|
pdev->d3cold_delay = 0;
|
|
|
|
obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 3,
|
|
FUNCTION_DELAY_DSM, NULL);
|
|
if (!obj)
|
|
return;
|
|
|
|
if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 5) {
|
|
elements = obj->package.elements;
|
|
if (elements[0].type == ACPI_TYPE_INTEGER) {
|
|
value = (int)elements[0].integer.value / 1000;
|
|
if (value < PCI_PM_D3COLD_WAIT)
|
|
pdev->d3cold_delay = value;
|
|
}
|
|
if (elements[3].type == ACPI_TYPE_INTEGER) {
|
|
value = (int)elements[3].integer.value / 1000;
|
|
if (value < PCI_PM_D3_WAIT)
|
|
pdev->d3_delay = value;
|
|
}
|
|
}
|
|
ACPI_FREE(obj);
|
|
}
|
|
|
|
static void pci_acpi_setup(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
|
|
if (!adev)
|
|
return;
|
|
|
|
pci_acpi_optimize_delay(pci_dev, adev->handle);
|
|
|
|
pci_acpi_add_pm_notifier(adev, pci_dev);
|
|
if (!adev->wakeup.flags.valid)
|
|
return;
|
|
|
|
device_set_wakeup_capable(dev, true);
|
|
acpi_pci_sleep_wake(pci_dev, false);
|
|
if (adev->wakeup.flags.run_wake)
|
|
device_set_run_wake(dev, true);
|
|
}
|
|
|
|
static void pci_acpi_cleanup(struct device *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
|
|
if (!adev)
|
|
return;
|
|
|
|
pci_acpi_remove_pm_notifier(adev);
|
|
if (adev->wakeup.flags.valid) {
|
|
device_set_wakeup_capable(dev, false);
|
|
device_set_run_wake(dev, false);
|
|
}
|
|
}
|
|
|
|
static bool pci_acpi_bus_match(struct device *dev)
|
|
{
|
|
return dev_is_pci(dev);
|
|
}
|
|
|
|
static struct acpi_bus_type acpi_pci_bus = {
|
|
.name = "PCI",
|
|
.match = pci_acpi_bus_match,
|
|
.find_companion = acpi_pci_find_companion,
|
|
.setup = pci_acpi_setup,
|
|
.cleanup = pci_acpi_cleanup,
|
|
};
|
|
|
|
|
|
static struct fwnode_handle *(*pci_msi_get_fwnode_cb)(struct device *dev);
|
|
|
|
/**
|
|
* pci_msi_register_fwnode_provider - Register callback to retrieve fwnode
|
|
* @fn: Callback matching a device to a fwnode that identifies a PCI
|
|
* MSI domain.
|
|
*
|
|
* This should be called by irqchip driver, which is the parent of
|
|
* the MSI domain to provide callback interface to query fwnode.
|
|
*/
|
|
void
|
|
pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *))
|
|
{
|
|
pci_msi_get_fwnode_cb = fn;
|
|
}
|
|
|
|
/**
|
|
* pci_host_bridge_acpi_msi_domain - Retrieve MSI domain of a PCI host bridge
|
|
* @bus: The PCI host bridge bus.
|
|
*
|
|
* This function uses the callback function registered by
|
|
* pci_msi_register_fwnode_provider() to retrieve the irq_domain with
|
|
* type DOMAIN_BUS_PCI_MSI of the specified host bridge bus.
|
|
* This returns NULL on error or when the domain is not found.
|
|
*/
|
|
struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus)
|
|
{
|
|
struct fwnode_handle *fwnode;
|
|
|
|
if (!pci_msi_get_fwnode_cb)
|
|
return NULL;
|
|
|
|
fwnode = pci_msi_get_fwnode_cb(&bus->dev);
|
|
if (!fwnode)
|
|
return NULL;
|
|
|
|
return irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI);
|
|
}
|
|
|
|
static int __init acpi_pci_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) {
|
|
pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n");
|
|
pci_no_msi();
|
|
}
|
|
|
|
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
|
|
pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
|
|
pcie_no_aspm();
|
|
}
|
|
|
|
ret = register_acpi_bus_type(&acpi_pci_bus);
|
|
if (ret)
|
|
return 0;
|
|
|
|
pci_set_platform_pm(&acpi_pci_platform_pm);
|
|
acpi_pci_slot_init();
|
|
acpiphp_init();
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(acpi_pci_init);
|