43c9fad942
- 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 ...
517 lines
14 KiB
C
517 lines
14 KiB
C
/*
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* pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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* Copyright (C) 2002 Dominik Brodowski <devel@brodo.de>
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* (c) Copyright 2008 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/dmi.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/pm.h>
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#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/slab.h>
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#define PREFIX "ACPI: "
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#define _COMPONENT ACPI_PCI_COMPONENT
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ACPI_MODULE_NAME("pci_irq");
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struct acpi_prt_entry {
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struct acpi_pci_id id;
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u8 pin;
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acpi_handle link;
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u32 index; /* GSI, or link _CRS index */
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};
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static inline char pin_name(int pin)
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{
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return 'A' + pin - 1;
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}
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/* --------------------------------------------------------------------------
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PCI IRQ Routing Table (PRT) Support
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-------------------------------------------------------------------------- */
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/* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */
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static const struct dmi_system_id medion_md9580[] = {
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{
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.ident = "Medion MD9580-F laptop",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
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DMI_MATCH(DMI_PRODUCT_NAME, "A555"),
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},
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},
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{ }
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};
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/* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */
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static const struct dmi_system_id dell_optiplex[] = {
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{
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.ident = "Dell Optiplex GX1",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"),
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},
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},
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{ }
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};
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/* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */
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static const struct dmi_system_id hp_t5710[] = {
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{
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.ident = "HP t5710",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"),
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DMI_MATCH(DMI_BOARD_NAME, "098Ch"),
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},
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},
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{ }
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};
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struct prt_quirk {
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const struct dmi_system_id *system;
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unsigned int segment;
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unsigned int bus;
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unsigned int device;
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unsigned char pin;
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const char *source; /* according to BIOS */
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const char *actual_source;
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};
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#define PCI_INTX_PIN(c) (c - 'A' + 1)
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/*
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* These systems have incorrect _PRT entries. The BIOS claims the PCI
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* interrupt at the listed segment/bus/device/pin is connected to the first
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* link device, but it is actually connected to the second.
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*/
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static const struct prt_quirk prt_quirks[] = {
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{ medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'),
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"\\_SB_.PCI0.ISA_.LNKA",
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"\\_SB_.PCI0.ISA_.LNKB"},
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{ dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'),
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"\\_SB_.LNKB",
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"\\_SB_.LNKA"},
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{ hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'),
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"\\_SB_.PCI0.LNK1",
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"\\_SB_.PCI0.LNK3"},
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};
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static void do_prt_fixups(struct acpi_prt_entry *entry,
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struct acpi_pci_routing_table *prt)
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{
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int i;
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const struct prt_quirk *quirk;
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for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) {
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quirk = &prt_quirks[i];
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/* All current quirks involve link devices, not GSIs */
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if (!prt->source)
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continue;
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if (dmi_check_system(quirk->system) &&
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entry->id.segment == quirk->segment &&
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entry->id.bus == quirk->bus &&
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entry->id.device == quirk->device &&
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entry->pin == quirk->pin &&
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!strcmp(prt->source, quirk->source) &&
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strlen(prt->source) >= strlen(quirk->actual_source)) {
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printk(KERN_WARNING PREFIX "firmware reports "
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"%04x:%02x:%02x PCI INT %c connected to %s; "
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"changing to %s\n",
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entry->id.segment, entry->id.bus,
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entry->id.device, pin_name(entry->pin),
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prt->source, quirk->actual_source);
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strcpy(prt->source, quirk->actual_source);
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}
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}
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}
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static int acpi_pci_irq_check_entry(acpi_handle handle, struct pci_dev *dev,
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int pin, struct acpi_pci_routing_table *prt,
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struct acpi_prt_entry **entry_ptr)
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{
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int segment = pci_domain_nr(dev->bus);
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int bus = dev->bus->number;
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int device = pci_ari_enabled(dev->bus) ? 0 : PCI_SLOT(dev->devfn);
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struct acpi_prt_entry *entry;
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if (((prt->address >> 16) & 0xffff) != device ||
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prt->pin + 1 != pin)
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return -ENODEV;
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entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
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if (!entry)
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return -ENOMEM;
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/*
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* Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses
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* 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert
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* it here.
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*/
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entry->id.segment = segment;
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entry->id.bus = bus;
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entry->id.device = (prt->address >> 16) & 0xFFFF;
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entry->pin = prt->pin + 1;
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do_prt_fixups(entry, prt);
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entry->index = prt->source_index;
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/*
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* Type 1: Dynamic
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* ---------------
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* The 'source' field specifies the PCI interrupt link device used to
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* configure the IRQ assigned to this slot|dev|pin. The 'source_index'
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* indicates which resource descriptor in the resource template (of
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* the link device) this interrupt is allocated from.
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*
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* NOTE: Don't query the Link Device for IRQ information at this time
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* because Link Device enumeration may not have occurred yet
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* (e.g. exists somewhere 'below' this _PRT entry in the ACPI
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* namespace).
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*/
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if (prt->source[0])
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acpi_get_handle(handle, prt->source, &entry->link);
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/*
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* Type 2: Static
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* --------------
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* The 'source' field is NULL, and the 'source_index' field specifies
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* the IRQ value, which is hardwired to specific interrupt inputs on
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* the interrupt controller.
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*/
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
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" %04x:%02x:%02x[%c] -> %s[%d]\n",
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entry->id.segment, entry->id.bus,
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entry->id.device, pin_name(entry->pin),
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prt->source, entry->index));
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*entry_ptr = entry;
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return 0;
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}
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static int acpi_pci_irq_find_prt_entry(struct pci_dev *dev,
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int pin, struct acpi_prt_entry **entry_ptr)
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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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struct acpi_pci_routing_table *entry;
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acpi_handle handle = NULL;
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if (dev->bus->bridge)
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handle = ACPI_HANDLE(dev->bus->bridge);
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if (!handle)
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return -ENODEV;
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/* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */
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status = acpi_get_irq_routing_table(handle, &buffer);
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if (ACPI_FAILURE(status)) {
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kfree(buffer.pointer);
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return -ENODEV;
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}
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entry = buffer.pointer;
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while (entry && (entry->length > 0)) {
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if (!acpi_pci_irq_check_entry(handle, dev, pin,
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entry, entry_ptr))
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break;
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entry = (struct acpi_pci_routing_table *)
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((unsigned long)entry + entry->length);
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}
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kfree(buffer.pointer);
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return 0;
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}
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/* --------------------------------------------------------------------------
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PCI Interrupt Routing Support
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-------------------------------------------------------------------------- */
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#ifdef CONFIG_X86_IO_APIC
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extern int noioapicquirk;
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extern int noioapicreroute;
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static int bridge_has_boot_interrupt_variant(struct pci_bus *bus)
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{
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struct pci_bus *bus_it;
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for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) {
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if (!bus_it->self)
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return 0;
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if (bus_it->self->irq_reroute_variant)
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return bus_it->self->irq_reroute_variant;
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}
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return 0;
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}
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/*
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* Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ
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* entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does
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* during interrupt handling). When this INTx generation cannot be disabled,
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* we reroute these interrupts to their legacy equivalent to get rid of
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* spurious interrupts.
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*/
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static int acpi_reroute_boot_interrupt(struct pci_dev *dev,
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struct acpi_prt_entry *entry)
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{
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if (noioapicquirk || noioapicreroute) {
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return 0;
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} else {
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switch (bridge_has_boot_interrupt_variant(dev->bus)) {
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case 0:
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/* no rerouting necessary */
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return 0;
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|
case INTEL_IRQ_REROUTE_VARIANT:
|
|
/*
|
|
* Remap according to INTx routing table in 6700PXH
|
|
* specs, intel order number 302628-002, section
|
|
* 2.15.2. Other chipsets (80332, ...) have the same
|
|
* mapping and are handled here as well.
|
|
*/
|
|
dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy "
|
|
"IRQ %d\n", entry->index,
|
|
(entry->index % 4) + 16);
|
|
entry->index = (entry->index % 4) + 16;
|
|
return 1;
|
|
default:
|
|
dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy "
|
|
"IRQ: unknown mapping\n", entry->index);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
#endif /* CONFIG_X86_IO_APIC */
|
|
|
|
static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
|
|
{
|
|
struct acpi_prt_entry *entry = NULL;
|
|
struct pci_dev *bridge;
|
|
u8 bridge_pin, orig_pin = pin;
|
|
int ret;
|
|
|
|
ret = acpi_pci_irq_find_prt_entry(dev, pin, &entry);
|
|
if (!ret && entry) {
|
|
#ifdef CONFIG_X86_IO_APIC
|
|
acpi_reroute_boot_interrupt(dev, entry);
|
|
#endif /* CONFIG_X86_IO_APIC */
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
|
|
pci_name(dev), pin_name(pin)));
|
|
return entry;
|
|
}
|
|
|
|
/*
|
|
* Attempt to derive an IRQ for this device from a parent bridge's
|
|
* PCI interrupt routing entry (eg. yenta bridge and add-in card bridge).
|
|
*/
|
|
bridge = dev->bus->self;
|
|
while (bridge) {
|
|
pin = pci_swizzle_interrupt_pin(dev, pin);
|
|
|
|
if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) {
|
|
/* PC card has the same IRQ as its cardbridge */
|
|
bridge_pin = bridge->pin;
|
|
if (!bridge_pin) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"No interrupt pin configured for device %s\n",
|
|
pci_name(bridge)));
|
|
return NULL;
|
|
}
|
|
pin = bridge_pin;
|
|
}
|
|
|
|
ret = acpi_pci_irq_find_prt_entry(bridge, pin, &entry);
|
|
if (!ret && entry) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Derived GSI for %s INT %c from %s\n",
|
|
pci_name(dev), pin_name(orig_pin),
|
|
pci_name(bridge)));
|
|
return entry;
|
|
}
|
|
|
|
dev = bridge;
|
|
bridge = dev->bus->self;
|
|
}
|
|
|
|
dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n",
|
|
pin_name(orig_pin));
|
|
return NULL;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA)
|
|
static int acpi_isa_register_gsi(struct pci_dev *dev)
|
|
{
|
|
u32 dev_gsi;
|
|
|
|
/* Interrupt Line values above 0xF are forbidden */
|
|
if (dev->irq > 0 && (dev->irq <= 0xF) &&
|
|
(acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) {
|
|
dev_warn(&dev->dev, "PCI INT %c: no GSI - using ISA IRQ %d\n",
|
|
pin_name(dev->pin), dev->irq);
|
|
acpi_register_gsi(&dev->dev, dev_gsi,
|
|
ACPI_LEVEL_SENSITIVE,
|
|
ACPI_ACTIVE_LOW);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
#else
|
|
static inline int acpi_isa_register_gsi(struct pci_dev *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
int acpi_pci_irq_enable(struct pci_dev *dev)
|
|
{
|
|
struct acpi_prt_entry *entry;
|
|
int gsi;
|
|
u8 pin;
|
|
int triggering = ACPI_LEVEL_SENSITIVE;
|
|
int polarity = ACPI_ACTIVE_LOW;
|
|
char *link = NULL;
|
|
char link_desc[16];
|
|
int rc;
|
|
|
|
pin = dev->pin;
|
|
if (!pin) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"No interrupt pin configured for device %s\n",
|
|
pci_name(dev)));
|
|
return 0;
|
|
}
|
|
|
|
if (dev->irq_managed && dev->irq > 0)
|
|
return 0;
|
|
|
|
entry = acpi_pci_irq_lookup(dev, pin);
|
|
if (!entry) {
|
|
/*
|
|
* IDE legacy mode controller IRQs are magic. Why do compat
|
|
* extensions always make such a nasty mess.
|
|
*/
|
|
if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
|
|
(dev->class & 0x05) == 0)
|
|
return 0;
|
|
}
|
|
|
|
if (entry) {
|
|
if (entry->link)
|
|
gsi = acpi_pci_link_allocate_irq(entry->link,
|
|
entry->index,
|
|
&triggering, &polarity,
|
|
&link);
|
|
else
|
|
gsi = entry->index;
|
|
} else
|
|
gsi = -1;
|
|
|
|
/*
|
|
* No IRQ known to the ACPI subsystem - maybe the BIOS /
|
|
* driver reported one, then use it. Exit in any case.
|
|
*/
|
|
if (gsi < 0) {
|
|
if (acpi_isa_register_gsi(dev))
|
|
dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
|
|
pin_name(pin));
|
|
|
|
kfree(entry);
|
|
return 0;
|
|
}
|
|
|
|
rc = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
|
|
if (rc < 0) {
|
|
dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n",
|
|
pin_name(pin));
|
|
kfree(entry);
|
|
return rc;
|
|
}
|
|
dev->irq = rc;
|
|
dev->irq_managed = 1;
|
|
|
|
if (link)
|
|
snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link);
|
|
else
|
|
link_desc[0] = '\0';
|
|
|
|
dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n",
|
|
pin_name(pin), link_desc, gsi,
|
|
(triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
|
|
(polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
|
|
|
|
kfree(entry);
|
|
return 0;
|
|
}
|
|
|
|
void acpi_pci_irq_disable(struct pci_dev *dev)
|
|
{
|
|
struct acpi_prt_entry *entry;
|
|
int gsi;
|
|
u8 pin;
|
|
|
|
pin = dev->pin;
|
|
if (!pin || !dev->irq_managed || dev->irq <= 0)
|
|
return;
|
|
|
|
/* Keep IOAPIC pin configuration when suspending */
|
|
if (dev->dev.power.is_prepared)
|
|
return;
|
|
#ifdef CONFIG_PM
|
|
if (dev->dev.power.runtime_status == RPM_SUSPENDING)
|
|
return;
|
|
#endif
|
|
|
|
entry = acpi_pci_irq_lookup(dev, pin);
|
|
if (!entry)
|
|
return;
|
|
|
|
if (entry->link)
|
|
gsi = acpi_pci_link_free_irq(entry->link);
|
|
else
|
|
gsi = entry->index;
|
|
|
|
kfree(entry);
|
|
|
|
/*
|
|
* TBD: It might be worth clearing dev->irq by magic constant
|
|
* (e.g. PCI_UNDEFINED_IRQ).
|
|
*/
|
|
|
|
dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin));
|
|
if (gsi >= 0) {
|
|
acpi_unregister_gsi(gsi);
|
|
dev->irq_managed = 0;
|
|
}
|
|
}
|