mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- ACPICA update to upstream revision 20150515 including basic support for ACPI 6 features: new ACPI tables introduced by ACPI 6 (STAO, XENV, WPBT, NFIT, IORT), changes related to the other tables (DTRM, FADT, LPIT, MADT), new predefined names (_BTH, _CR3, _DSD, _LPI, _MTL, _PRR, _RDI, _RST, _TFP, _TSN), fixes and cleanups (Bob Moore, Lv Zheng). - ACPI device power management core code update to follow ACPI 6 which reflects the ACPI device power management implementation in Windows (Rafael J Wysocki). - Rework of the backlight interface selection logic to reduce the number of kernel command line options and improve the handling of DMI quirks that may be involved in that and to make the code generally more straightforward (Hans de Goede). - Fixes for the ACPI Embedded Controller (EC) driver related to the handling of EC transactions (Lv Zheng). - Fix for a regression related to the ACPI resources management and resulting from a recent change of ACPI initialization code ordering (Rafael J Wysocki). - Fix for a system initialization regression related to ACPI introduced during the 3.14 cycle and caused by running the code that switches the platform over to the ACPI mode too early in the initialization sequence (Rafael J Wysocki). - Support for the ACPI _CCA device configuration object related to DMA cache coherence (Suravee Suthikulpanit). - ACPI/APEI fixes and cleanups (Jiri Kosina, Borislav Petkov). - ACPI battery driver cleanups (Luis Henriques, Mathias Krause). - ACPI processor driver cleanups (Hanjun Guo). - Cleanups and documentation update related to the ACPI device properties interface based on _DSD (Rafael J Wysocki). - ACPI device power management fixes (Rafael J Wysocki). - Assorted cleanups related to ACPI (Dominik Brodowski. Fabian Frederick, Lorenzo Pieralisi, Mathias Krause, Rafael J Wysocki). - Fix for a long-standing issue causing General Protection Faults to be generated occasionally on return to user space after resume from ACPI-based suspend-to-RAM on 32-bit x86 (Ingo Molnar). - Fix to make the suspend core code return -EBUSY consistently in all cases when system suspend is aborted due to wakeup detection (Ruchi Kandoi). - Support for automated device wakeup IRQ handling allowing drivers to make their PM support more starightforward (Tony Lindgren). - New tracepoints for suspend-to-idle tracing and rework of the prepare/complete callbacks tracing in the PM core (Todd E Brandt, Rafael J Wysocki). - Wakeup sources framework enhancements (Jin Qian). - New macro for noirq system PM callbacks (Grygorii Strashko). - Assorted cleanups related to system suspend (Rafael J Wysocki). - cpuidle core cleanups to make the code more efficient (Rafael J Wysocki). - powernv/pseries cpuidle driver update (Shilpasri G Bhat). - cpufreq core fixes related to CPU online/offline that should reduce the overhead of these operations quite a bit, unless the CPU in question is physically going away (Viresh Kumar, Saravana Kannan). - Serialization of cpufreq governor callbacks to avoid race conditions in some cases (Viresh Kumar). - intel_pstate driver fixes and cleanups (Doug Smythies, Prarit Bhargava, Joe Konno). - cpufreq driver (arm_big_little, cpufreq-dt, qoriq) updates (Sudeep Holla, Felipe Balbi, Tang Yuantian). - Assorted cleanups in cpufreq drivers and core (Shailendra Verma, Fabian Frederick, Wang Long). - New Device Tree bindings for representing Operating Performance Points (Viresh Kumar). - Updates for the common clock operations support code in the PM core (Rajendra Nayak, Geert Uytterhoeven). - PM domains core code update (Geert Uytterhoeven). - Intel Knights Landing support for the RAPL (Running Average Power Limit) power capping driver (Dasaratharaman Chandramouli). - Fixes related to the floor frequency setting on Atom SoCs in the RAPL power capping driver (Ajay Thomas). - Runtime PM framework documentation update (Ben Dooks). - cpupower tool fix (Herton R Krzesinski). / -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAABCAAGBQJViJdWAAoJEILEb/54YlRx/9gP/3gHoFevNRycvn0VpKqdufCI Mxy2LBBLlfyW2uD3+NvqvA2WWSo0Cs/LgXa04eAVxPdU7k48s8w+54U23wSouzjW gfwAmuHxzDR8v0h8X3h6BxNzmkIQHtmDcQlA/cZdHejY/UUw01yxRGNUUZDNbxlm WXn2nmlBLmGqXTYq0fpBV+3jicUghJqHHsBCqa3VR2yQioHMJG01F4UZMqYTZunN OIvDUghxByKz6alzdCqlLl1Y0exV6vwWUAzBsl1qHqmHu/bWFSZn3ujNNVrjqHhw Kl7/8dC2pQkv3Zo3gEVvfQ0onotwWZxGHzPQRdvmxvRnBunQVCi/wynx90yABX/r PPb/iBNV0mZskbF0zb0GZT3ZZWGA8Z0p3o5JQv2jV4m62qTzx8w50Y5kbn9N1WT+ 5bre7AVbVAlGonWszcS9iE+6TOboRz9OD1CCwPFXHItFutlBkau+1hHfFoLM0o9n LhpGuyszT/EUa1BHkLzuCckFqO2DpbF3N2CKmuTekw0CdgdsvRL2pRByuerk3j7R WQhlcvBq5YH6j43AuoEZKp8r1iN8oG/iqlrMYQaYWrW9hJaoQOoU8dGJxp/e7gKN r/qeYjETI+tIsjCbtH5WQzzxDI3gPISAYAtfqs7G34EEo+Lwp6kyRUAF4kDot2V3 ZIyuKMmTu4cdwDETr/O+ =7jTj -----END PGP SIGNATURE----- Merge tag 'pm+acpi-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management and ACPI updates from Rafael Wysocki: "The rework of backlight interface selection API from Hans de Goede stands out from the number of commits and the number of affected places perspective. The cpufreq core fixes from Viresh Kumar are quite significant too as far as the number of commits goes and because they should reduce CPU online/offline overhead quite a bit in the majority of cases. From the new featues point of view, the ACPICA update (to upstream revision 20150515) adding support for new ACPI 6 material to ACPICA is the one that matters the most as some new significant features will be based on it going forward. Also included is an update of the ACPI device power management core to follow ACPI 6 (which in turn reflects the Windows' device PM implementation), a PM core extension to support wakeup interrupts in a more generic way and support for the ACPI _CCA device configuration object. The rest is mostly fixes and cleanups all over and some documentation updates, including new DT bindings for Operating Performance Points. There is one fix for a regression introduced in the 4.1 cycle, but it adds quite a number of lines of code, it wasn't really ready before Thursday and you were on vacation, so I refrained from pushing it on the last minute for 4.1. Specifics: - ACPICA update to upstream revision 20150515 including basic support for ACPI 6 features: new ACPI tables introduced by ACPI 6 (STAO, XENV, WPBT, NFIT, IORT), changes related to the other tables (DTRM, FADT, LPIT, MADT), new predefined names (_BTH, _CR3, _DSD, _LPI, _MTL, _PRR, _RDI, _RST, _TFP, _TSN), fixes and cleanups (Bob Moore, Lv Zheng). - ACPI device power management core code update to follow ACPI 6 which reflects the ACPI device power management implementation in Windows (Rafael J Wysocki). - rework of the backlight interface selection logic to reduce the number of kernel command line options and improve the handling of DMI quirks that may be involved in that and to make the code generally more straightforward (Hans de Goede). - fixes for the ACPI Embedded Controller (EC) driver related to the handling of EC transactions (Lv Zheng). - fix for a regression related to the ACPI resources management and resulting from a recent change of ACPI initialization code ordering (Rafael J Wysocki). - fix for a system initialization regression related to ACPI introduced during the 3.14 cycle and caused by running the code that switches the platform over to the ACPI mode too early in the initialization sequence (Rafael J Wysocki). - support for the ACPI _CCA device configuration object related to DMA cache coherence (Suravee Suthikulpanit). - ACPI/APEI fixes and cleanups (Jiri Kosina, Borislav Petkov). - ACPI battery driver cleanups (Luis Henriques, Mathias Krause). - ACPI processor driver cleanups (Hanjun Guo). - cleanups and documentation update related to the ACPI device properties interface based on _DSD (Rafael J Wysocki). - ACPI device power management fixes (Rafael J Wysocki). - assorted cleanups related to ACPI (Dominik Brodowski, Fabian Frederick, Lorenzo Pieralisi, Mathias Krause, Rafael J Wysocki). - fix for a long-standing issue causing General Protection Faults to be generated occasionally on return to user space after resume from ACPI-based suspend-to-RAM on 32-bit x86 (Ingo Molnar). - fix to make the suspend core code return -EBUSY consistently in all cases when system suspend is aborted due to wakeup detection (Ruchi Kandoi). - support for automated device wakeup IRQ handling allowing drivers to make their PM support more starightforward (Tony Lindgren). - new tracepoints for suspend-to-idle tracing and rework of the prepare/complete callbacks tracing in the PM core (Todd E Brandt, Rafael J Wysocki). - wakeup sources framework enhancements (Jin Qian). - new macro for noirq system PM callbacks (Grygorii Strashko). - assorted cleanups related to system suspend (Rafael J Wysocki). - cpuidle core cleanups to make the code more efficient (Rafael J Wysocki). - powernv/pseries cpuidle driver update (Shilpasri G Bhat). - cpufreq core fixes related to CPU online/offline that should reduce the overhead of these operations quite a bit, unless the CPU in question is physically going away (Viresh Kumar, Saravana Kannan). - serialization of cpufreq governor callbacks to avoid race conditions in some cases (Viresh Kumar). - intel_pstate driver fixes and cleanups (Doug Smythies, Prarit Bhargava, Joe Konno). - cpufreq driver (arm_big_little, cpufreq-dt, qoriq) updates (Sudeep Holla, Felipe Balbi, Tang Yuantian). - assorted cleanups in cpufreq drivers and core (Shailendra Verma, Fabian Frederick, Wang Long). - new Device Tree bindings for representing Operating Performance Points (Viresh Kumar). - updates for the common clock operations support code in the PM core (Rajendra Nayak, Geert Uytterhoeven). - PM domains core code update (Geert Uytterhoeven). - Intel Knights Landing support for the RAPL (Running Average Power Limit) power capping driver (Dasaratharaman Chandramouli). - fixes related to the floor frequency setting on Atom SoCs in the RAPL power capping driver (Ajay Thomas). - runtime PM framework documentation update (Ben Dooks). - cpupower tool fix (Herton R Krzesinski)" * tag 'pm+acpi-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (194 commits) cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state x86: Load __USER_DS into DS/ES after resume PM / OPP: Add binding for 'opp-suspend' PM / OPP: Allow multiple OPP tables to be passed via DT PM / OPP: Add new bindings to address shortcomings of existing bindings ACPI: Constify ACPI device IDs in documentation ACPI / enumeration: Document the rules regarding the PRP0001 device ID ACPI / video: Make acpi_video_unregister_backlight() private acpi-video-detect: Remove old API toshiba-acpi: Port to new backlight interface selection API thinkpad-acpi: Port to new backlight interface selection API sony-laptop: Port to new backlight interface selection API samsung-laptop: Port to new backlight interface selection API msi-wmi: Port to new backlight interface selection API msi-laptop: Port to new backlight interface selection API intel-oaktrail: Port to new backlight interface selection API ideapad-laptop: Port to new backlight interface selection API fujitsu-laptop: Port to new backlight interface selection API eeepc-laptop: Port to new backlight interface selection API dell-wmi: Port to new backlight interface selection API ...
254 lines
5.3 KiB
C
254 lines
5.3 KiB
C
/*
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* AMD Cryptographic Coprocessor (CCP) driver
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*
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* Copyright (C) 2014 Advanced Micro Devices, Inc.
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*
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* Author: Tom Lendacky <thomas.lendacky@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/ioport.h>
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#include <linux/dma-mapping.h>
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#include <linux/kthread.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <linux/ccp.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/acpi.h>
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#include "ccp-dev.h"
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struct ccp_platform {
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int use_acpi;
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int coherent;
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};
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static int ccp_get_irq(struct ccp_device *ccp)
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{
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struct device *dev = ccp->dev;
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struct platform_device *pdev = container_of(dev,
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struct platform_device, dev);
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int ret;
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ret = platform_get_irq(pdev, 0);
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if (ret < 0)
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return ret;
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ccp->irq = ret;
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ret = request_irq(ccp->irq, ccp_irq_handler, 0, "ccp", dev);
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if (ret) {
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dev_notice(dev, "unable to allocate IRQ (%d)\n", ret);
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return ret;
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}
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return 0;
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}
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static int ccp_get_irqs(struct ccp_device *ccp)
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{
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struct device *dev = ccp->dev;
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int ret;
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ret = ccp_get_irq(ccp);
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if (!ret)
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return 0;
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/* Couldn't get an interrupt */
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dev_notice(dev, "could not enable interrupts (%d)\n", ret);
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return ret;
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}
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static void ccp_free_irqs(struct ccp_device *ccp)
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{
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struct device *dev = ccp->dev;
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free_irq(ccp->irq, dev);
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}
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static struct resource *ccp_find_mmio_area(struct ccp_device *ccp)
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{
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struct device *dev = ccp->dev;
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struct platform_device *pdev = container_of(dev,
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struct platform_device, dev);
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struct resource *ior;
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ior = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (ior && (resource_size(ior) >= 0x800))
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return ior;
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return NULL;
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}
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static int ccp_platform_probe(struct platform_device *pdev)
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{
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struct ccp_device *ccp;
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struct ccp_platform *ccp_platform;
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struct device *dev = &pdev->dev;
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struct acpi_device *adev = ACPI_COMPANION(dev);
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struct resource *ior;
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int ret;
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ret = -ENOMEM;
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ccp = ccp_alloc_struct(dev);
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if (!ccp)
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goto e_err;
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ccp_platform = devm_kzalloc(dev, sizeof(*ccp_platform), GFP_KERNEL);
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if (!ccp_platform)
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goto e_err;
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ccp->dev_specific = ccp_platform;
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ccp->get_irq = ccp_get_irqs;
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ccp->free_irq = ccp_free_irqs;
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ccp_platform->use_acpi = (!adev || acpi_disabled) ? 0 : 1;
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ior = ccp_find_mmio_area(ccp);
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ccp->io_map = devm_ioremap_resource(dev, ior);
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if (IS_ERR(ccp->io_map)) {
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ret = PTR_ERR(ccp->io_map);
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goto e_err;
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}
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ccp->io_regs = ccp->io_map;
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
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if (ret) {
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dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", ret);
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goto e_err;
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}
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ccp_platform->coherent = device_dma_is_coherent(ccp->dev);
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if (ccp_platform->coherent)
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ccp->axcache = CACHE_WB_NO_ALLOC;
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else
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ccp->axcache = CACHE_NONE;
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dev_set_drvdata(dev, ccp);
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ret = ccp_init(ccp);
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if (ret)
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goto e_err;
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dev_notice(dev, "enabled\n");
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return 0;
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e_err:
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dev_notice(dev, "initialization failed\n");
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return ret;
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}
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static int ccp_platform_remove(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ccp_device *ccp = dev_get_drvdata(dev);
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ccp_destroy(ccp);
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dev_notice(dev, "disabled\n");
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return 0;
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}
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#ifdef CONFIG_PM
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static int ccp_platform_suspend(struct platform_device *pdev,
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pm_message_t state)
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{
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struct device *dev = &pdev->dev;
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struct ccp_device *ccp = dev_get_drvdata(dev);
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unsigned long flags;
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unsigned int i;
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spin_lock_irqsave(&ccp->cmd_lock, flags);
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ccp->suspending = 1;
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/* Wake all the queue kthreads to prepare for suspend */
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for (i = 0; i < ccp->cmd_q_count; i++)
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wake_up_process(ccp->cmd_q[i].kthread);
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spin_unlock_irqrestore(&ccp->cmd_lock, flags);
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/* Wait for all queue kthreads to say they're done */
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while (!ccp_queues_suspended(ccp))
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wait_event_interruptible(ccp->suspend_queue,
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ccp_queues_suspended(ccp));
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return 0;
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}
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static int ccp_platform_resume(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ccp_device *ccp = dev_get_drvdata(dev);
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unsigned long flags;
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unsigned int i;
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spin_lock_irqsave(&ccp->cmd_lock, flags);
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ccp->suspending = 0;
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/* Wake up all the kthreads */
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for (i = 0; i < ccp->cmd_q_count; i++) {
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ccp->cmd_q[i].suspended = 0;
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wake_up_process(ccp->cmd_q[i].kthread);
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}
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spin_unlock_irqrestore(&ccp->cmd_lock, flags);
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return 0;
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}
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id ccp_acpi_match[] = {
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{ "AMDI0C00", 0 },
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{ },
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};
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#endif
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#ifdef CONFIG_OF
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static const struct of_device_id ccp_of_match[] = {
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{ .compatible = "amd,ccp-seattle-v1a" },
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{ },
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};
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#endif
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static struct platform_driver ccp_platform_driver = {
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.driver = {
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.name = "AMD Cryptographic Coprocessor",
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#ifdef CONFIG_ACPI
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.acpi_match_table = ccp_acpi_match,
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#endif
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#ifdef CONFIG_OF
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.of_match_table = ccp_of_match,
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#endif
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},
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.probe = ccp_platform_probe,
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.remove = ccp_platform_remove,
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#ifdef CONFIG_PM
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.suspend = ccp_platform_suspend,
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.resume = ccp_platform_resume,
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#endif
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};
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int ccp_platform_init(void)
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{
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return platform_driver_register(&ccp_platform_driver);
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}
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void ccp_platform_exit(void)
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{
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platform_driver_unregister(&ccp_platform_driver);
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}
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