kernel/git/stable/linux.git/drivers/pci/ioapic.c, branch master

PCI: Remove PCI ioapic driver

2014-12-16T13:08:14+00:00

To support IOAPIC hotplug on x86 and IA64 platforms, OS needs to figure out global interrupt source number(GSI) and IOAPIC enumeration ID through ACPI interfaces. So BIOS must implement an ACPI IOAPIC device with _GSB/_UID or _MAT method to support IOAPIC hotplug. OS also needs to figure out base physical address to access IOAPIC registers. OS may get the base physical address through PCI BARs if IOAPIC device is visible in PCI domain, otherwise OS may get the address by ACPI _CRS method if IOAPIC device is hidden from PCI domain by BIOS. When adding a PCI subtree, we need to add IOAPIC devices before enabling all other PCI devices because other PCI devices may use the IOAPIC to allocate PCI interrupts. So we plan to reimplement IOAPIC driver as an ACPI instead of PCI driver due to: 1) hot-pluggable IOAPIC devices are always visible in ACPI domain, but may or may not be visible in PCI domain. 2) we could explicitly control the order between IOAPIC and other PCI devices. We also have another choice to use a PCI driver to manage IOAPIC device if it's visible in PCI domain and use an ACPI driver if it's only visible in ACPI domain. But this solution is a little complex. It shouldn't cause serious backward compatibility issues because: 1) IOAPIC hotplug is never supported on x86 yet because it hasn't implemented the required acpi_register_ioapic() and acpi_unregister_ioapic(). 2) Currently only ACPI based IOAPIC hotplug is possible on x86 and IA64, we don't know other specifications and interfaces to support IOAPIC hotplug yet. 3) We will reimplement an ACPI IOAPIC driver to support IOAPIC hotplug. This change also helps to get rid of the false alarm on all current Linux distributions: [ 6.952497] ioapic: probe of 0000:00:05.4 failed with error -22 [ 6.959542] ioapic: probe of 0000:80:05.4 failed with error -22 Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Bjorn Helgaas Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Link: http://lkml.kernel.org/r/1414387308-27148-9-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner

PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use

2014-08-12T18:15:14+00:00

We should prefer `struct pci_device_id` over `DEFINE_PCI_DEVICE_TABLE` to meet kernel coding style guidelines. This issue was reported by checkpatch. A simplified version of the semantic patch that makes this change is as follows (http://coccinelle.lip6.fr/): // @@ identifier i; declarer name DEFINE_PCI_DEVICE_TABLE; initializer z; @@ - DEFINE_PCI_DEVICE_TABLE(i) + const struct pci_device_id i[] = z; // [bhelgaas: add semantic patch] Signed-off-by: Benoit Taine Signed-off-by: Bjorn Helgaas

Merge tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2014-01-24T23:51:02+00:00

Pull ACPI and power management updates from Rafael Wysocki: "As far as the number of commits goes, the top spot belongs to ACPI this time with cpufreq in the second position and a handful of PM core, PNP and cpuidle updates. They are fixes and cleanups mostly, as usual, with a couple of new features in the mix. The most visible change is probably that we will create struct acpi_device objects (visible in sysfs) for all devices represented in the ACPI tables regardless of their status and there will be a new sysfs attribute under those objects allowing user space to check that status via _STA. Consequently, ACPI device eject or generally hot-removal will not delete those objects, unless the table containing the corresponding namespace nodes is unloaded, which is extremely rare. Also ACPI container hotplug will be handled quite a bit differently and cpufreq will support CPU boost ("turbo") generically and not only in the acpi-cpufreq driver. Specifics: - ACPI core changes to make it create a struct acpi_device object for every device represented in the ACPI tables during all namespace scans regardless of the current status of that device. In accordance with this, ACPI hotplug operations will not delete those objects, unless the underlying ACPI tables go away. - On top of the above, new sysfs attribute for ACPI device objects allowing user space to check device status by triggering the execution of _STA for its ACPI object. From Srinivas Pandruvada. - ACPI core hotplug changes reducing code duplication, integrating the PCI root hotplug with the core and reworking container hotplug. - ACPI core simplifications making it use ACPI_COMPANION() in the code "glueing" ACPI device objects to "physical" devices. - ACPICA update to upstream version 20131218. This adds support for the DBG2 and PCCT tables to ACPICA, fixes some bugs and improves debug facilities. From Bob Moore, Lv Zheng and Betty Dall. - Init code change to carry out the early ACPI initialization earlier. That should allow us to use ACPI during the timekeeping initialization and possibly to simplify the EFI initialization too. From Chun-Yi Lee. - Clenups of the inclusions of ACPI headers in many places all over from Lv Zheng and Rashika Kheria (work in progress). - New helper for ACPI _DSM execution and rework of the code in drivers that uses _DSM to execute it via the new helper. From Jiang Liu. - New Win8 OSI blacklist entries from Takashi Iwai. - Assorted ACPI fixes and cleanups from Al Stone, Emil Goode, Hanjun Guo, Lan Tianyu, Masanari Iida, Oliver Neukum, Prarit Bhargava, Rashika Kheria, Tang Chen, Zhang Rui. - intel_pstate driver updates, including proper Baytrail support, from Dirk Brandewie and intel_pstate documentation from Ramkumar Ramachandra. - Generic CPU boost ("turbo") support for cpufreq from Lukasz Majewski. - powernow-k6 cpufreq driver fixes from Mikulas Patocka. - cpufreq core fixes and cleanups from Viresh Kumar, Jane Li, Mark Brown. - Assorted cpufreq drivers fixes and cleanups from Anson Huang, John Tobias, Paul Bolle, Paul Walmsley, Sachin Kamat, Shawn Guo, Viresh Kumar. - cpuidle cleanups from Bartlomiej Zolnierkiewicz. - Support for hibernation APM events from Bin Shi. - Hibernation fix to avoid bringing up nonboot CPUs with ACPI EC disabled during thaw transitions from Bjørn Mork. - PM core fixes and cleanups from Ben Dooks, Leonardo Potenza, Ulf Hansson. - PNP subsystem fixes and cleanups from Dmitry Torokhov, Levente Kurusa, Rashika Kheria. - New tool for profiling system suspend from Todd E Brandt and a cpupower tool cleanup from One Thousand Gnomes" * tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (153 commits) thermal: exynos: boost: Automatic enable/disable of BOOST feature (at Exynos4412) cpufreq: exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ Documentation: cpufreq / boost: Update BOOST documentation cpufreq: exynos: Extend Exynos cpufreq driver to support boost cpufreq / boost: Kconfig: Support for software-managed BOOST acpi-cpufreq: Adjust the code to use the common boost attribute cpufreq: Add boost frequency support in core intel_pstate: Add trace point to report internal state. cpufreq: introduce cpufreq_generic_get() routine ARM: SA1100: Create dummy clk_get_rate() to avoid build failures cpufreq: stats: create sysfs entries when cpufreq_stats is a module cpufreq: stats: free table and remove sysfs entry in a single routine cpufreq: stats: remove hotplug notifiers cpufreq: stats: handle cpufreq_unregister_driver() and suspend/resume properly cpufreq: speedstep: remove unused speedstep_get_state platform: introduce OF style 'modalias' support for platform bus PM / tools: new tool for suspend/resume performance optimization ACPI: fix module autoloading for ACPI enumerated devices ACPI: add module autoloading support for ACPI enumerated devices ACPI: fix create_modalias() return value handling ...

PCI: Convert ioapic to be builtin only, not modular

2014-01-03T21:31:38+00:00

Convert pci/ioapic.c to be builtin only, with no module option, so we can support IO-APIC hotplug. Also make it depend on X86_IO_APIC. [bhelgaas: changelog] Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas

ACPI: Clean up inclusions of ACPI header files

2013-12-07T00:03:14+00:00

Replace direct inclusions of , and , which are incorrect, with inclusions and remove some inclusions of those files that aren't necessary. First of all, , and should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that be included prior to so that the acpi_pci_root declarations the latter depends on are always there. And which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including as appropriate. Signed-off-by: Lv Zheng Cc: Greg Kroah-Hartman Cc: Matthew Garrett Cc: Tony Luck Cc: "H. Peter Anvin" Acked-by: Bjorn Helgaas (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk (Xen stuff) Signed-off-by: Rafael J. Wysocki

ACPI: Eliminate the DEVICE_ACPI_HANDLE() macro

2013-11-14T22:17:21+00:00

Since DEVICE_ACPI_HANDLE() is now literally identical to ACPI_HANDLE(), replace it with the latter everywhere and drop its definition from include/acpi.h. Signed-off-by: Rafael J. Wysocki Acked-by: Greg Kroah-Hartman

PCI: Convert ioapic.c to module_pci_driver

2013-05-27T23:05:28+00:00

Use module_pci_driver instead of init/exit, make code clean. Signed-off-by: Libo Chen Signed-off-by: Bjorn Helgaas

Merge tag 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2012-12-13T20:14:47+00:00

Pull PCI update from Bjorn Helgaas: "Host bridge hotplug: - Untangle _PRT from struct pci_bus (Bjorn Helgaas) - Request _OSC control before scanning root bus (Taku Izumi) - Assign resources when adding host bridge (Yinghai Lu) - Remove root bus when removing host bridge (Yinghai Lu) - Remove _PRT during hot remove (Yinghai Lu) SRIOV - Add sysfs knobs to control numVFs (Don Dutile) Power management - Notify devices when power resource turned on (Huang Ying) Bug fixes - Work around broken _SEG on HP xw9300 (Bjorn Helgaas) - Keep runtime PM enabled for unbound PCI devices (Huang Ying) - Fix Optimus dual-GPU runtime D3 suspend issue (Dave Airlie) - Fix xen frontend shutdown issue (David Vrabel) - Work around PLX PCI 9050 BAR alignment erratum (Ian Abbott) Miscellaneous - Add GPL license for drivers/pci/ioapic (Andrew Cooks) - Add standard PCI-X, PCIe ASPM register #defines (Bjorn Helgaas) - NumaChip remote PCI support (Daniel Blueman) - Fix PCIe Link Capabilities Supported Link Speed definition (Jingoo Han) - Convert dev_printk() to dev_info(), etc (Joe Perches) - Add support for non PCI BAR ROM data (Matthew Garrett) - Add x86 support for host bridge translation offset (Mike Yoknis) - Report success only when every driver supports AER (Vijay Pandarathil)" Fix up trivial conflicts. * tag 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits) PCI: Use phys_addr_t for physical ROM address x86/PCI: Add NumaChip remote PCI support ath9k: Use standard #defines for PCIe Capability ASPM fields iwlwifi: Use standard #defines for PCIe Capability ASPM fields iwlwifi: collapse wrapper for pcie_capability_read_word() iwlegacy: Use standard #defines for PCIe Capability ASPM fields iwlegacy: collapse wrapper for pcie_capability_read_word() cxgb3: Use standard #defines for PCIe Capability ASPM fields PCI: Add standard PCIe Capability Link ASPM field names PCI/portdrv: Use PCI Express Capability accessors PCI: Use standard PCIe Capability Link register field names x86: Use PCI setup data PCI: Add support for non-BAR ROMs PCI: Add pcibios_add_device EFI: Stash ROMs if they're not in the PCI BAR PCI: Add and use standard PCI-X Capability register names PCI/PM: Keep runtime PM enabled for unbound PCI devices xen-pcifront: Handle backend CLOSED without CLOSING PCI: SRIOV control and status via sysfs (documentation) PCI/AER: Report success only when every device has AER-aware driver ...

PCI: Remove __dev* markings

2012-11-28T21:16:47+00:00

CONFIG_HOTPLUG is going away as an option so __devexit_p, __devint, __devinitdata, __devinitconst, and _devexit are no longer needed. Signed-off-by: Bill Pemberton Acked-by: Bjorn Helgaas Signed-off-by: Greg Kroah-Hartman

PCI: Add GPL license for drivers/pci/ioapic module

2012-11-13T18:27:17+00:00

Config PCI_IOAPIC turned into a tristate in commit b95a7bd70046, but no module license is specified. This adds the missing module license. Signed-off-by: Andrew Cooks Signed-off-by: Bjorn Helgaas Acked-by: Jan Beulich