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* Merge tag 'devprop-4.14-rc1' of ↵Linus Torvalds2017-09-051-1/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull device properties framework updates from Rafael Wysocki: "These introduce fwnode operations for all of the separate types of 'firmware nodes' that can be handled by the device properties framework, make the framework use const fwnode arguments all over, add a helper for the consolidated handling of node references and switch over the framework to the new UUID API. Specifics: - Introduce fwnode operations for all of the separate types of 'firmware nodes' that can be handled by the device properties framework and drop the type field from struct fwnode_handle (Sakari Ailus, Arnd Bergmann). - Make the device properties framework use const fwnode arguments where possible (Sakari Ailus). - Add a helper for the consolidated handling of node references to the device properties framework (Sakari Ailus). - Switch over the ACPI part of the device properties framework to the new UUID API (Andy Shevchenko)" * tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: device property: Switch to use new generic UUID API device property: export irqchip_fwnode_ops device property: Introduce fwnode_property_get_reference_args device property: Constify fwnode property API device property: Constify argument to pset fwnode backend ACPI: Constify internal fwnode arguments ACPI: Constify acpi_bus helper functions, switch to macros ACPI: Prepare for constifying acpi_get_next_subnode() fwnode argument device property: Get rid of struct fwnode_handle type field ACPI: Use IS_ERR_OR_NULL() instead of non-NULL check in is_acpi_data_node()
| * device property: Get rid of struct fwnode_handle type fieldSakari Ailus2017-07-221-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of relying on the struct fwnode_handle type field, define fwnode_operations structs for all separate types of fwnodes. To find out the type, compare to the ops field to relevant ops structs. This change has two benefits: 1. it avoids adding the type field to each and every instance of struct fwnode_handle, thus saving memory and 2. makes the ops field the single factor that defines both the types of the fwnode as well as defines the implementation of its operations, decreasing the possibility of bugs when developing code dealing with fwnode internals. Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | irqdomain: Add irq_domain_{push,pop}_irq() functionsDavid Daney2017-08-181-0/+3
|/ | | | | | | | | | | | | | | | | | | | | | | For an already existing irqdomain hierarchy, as might be obtained via a call to pci_enable_msix_range(), a PCI driver wishing to add an additional irqdomain to the hierarchy needs to be able to insert the irqdomain to that already initialized hierarchy. Calling irq_domain_create_hierarchy() allows the new irqdomain to be created, but no existing code allows for initializing the associated irq_data. Add a couple of helper functions (irq_domain_push_irq() and irq_domain_pop_irq()) to initialize the irq_data for the new irqdomain added to an existing hierarchy. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Link: http://lkml.kernel.org/r/1503017616-3252-6-git-send-email-david.daney@cavium.com
* genirq/irqdomain: Remove auto-recursive hierarchy supportMarc Zyngier2017-06-221-6/+3
| | | | | | | | | | | It did seem like a good idea at the time, but it never really caught on, and auto-recursive domains remain unused 3 years after having been introduced. Oh well, time for a late spring cleanup. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq/irqdomain: Add irq_domain_update_bus_token helperMarc Zyngier2017-06-221-0/+3
| | | | | | | | | | | | | | | | | | | | We can have irq domains that are identified by the same fwnode (because they are serviced by the same HW), and yet have different functionnality (because they serve different busses, for example). This is what we use the bus_token field. Since we don't use this field when generating the domain name, all the aliasing domains will get the same name, and the debugfs file creation fails. Also, bus_token is updated by individual drivers, and the core code is unaware of that update. In order to sort this mess, let's introduce a helper that takes care of updating bus_token, and regenerate the debugfs file. A separate patch will update all the individual users. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq/debugfs: Add proper debugfs interfaceThomas Gleixner2017-06-221-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Debugging (hierarchical) interupt domains is tedious as there is no information about the hierarchy and no information about states of interrupts in the various domain levels. Add a debugfs directory 'irq' and subdirectories 'domains' and 'irqs'. The domains directory contains the domain files. The content is information about the domain. If the domain is part of a hierarchy then the parent domains are printed as well. # ls /sys/kernel/debug/irq/domains/ default INTEL-IR-2 INTEL-IR-MSI-2 IO-APIC-IR-2 PCI-MSI DMAR-MSI INTEL-IR-3 INTEL-IR-MSI-3 IO-APIC-IR-3 unknown-1 INTEL-IR-0 INTEL-IR-MSI-0 IO-APIC-IR-0 IO-APIC-IR-4 VECTOR INTEL-IR-1 INTEL-IR-MSI-1 IO-APIC-IR-1 PCI-HT # cat /sys/kernel/debug/irq/domains/VECTOR name: VECTOR size: 0 mapped: 216 flags: 0x00000041 # cat /sys/kernel/debug/irq/domains/IO-APIC-IR-0 name: IO-APIC-IR-0 size: 24 mapped: 19 flags: 0x00000041 parent: INTEL-IR-3 name: INTEL-IR-3 size: 65536 mapped: 167 flags: 0x00000041 parent: VECTOR name: VECTOR size: 0 mapped: 216 flags: 0x00000041 Unfortunately there is no per cpu information about the VECTOR domain (yet). The irqs directory contains detailed information about mapped interrupts. # cat /sys/kernel/debug/irq/irqs/3 handler: handle_edge_irq status: 0x00004000 istate: 0x00000000 ddepth: 1 wdepth: 0 dstate: 0x01018000 IRQD_IRQ_DISABLED IRQD_SINGLE_TARGET IRQD_MOVE_PCNTXT node: 0 affinity: 0-143 effectiv: 0 pending: domain: IO-APIC-IR-0 hwirq: 0x3 chip: IR-IO-APIC flags: 0x10 IRQCHIP_SKIP_SET_WAKE parent: domain: INTEL-IR-3 hwirq: 0x20000 chip: INTEL-IR flags: 0x0 parent: domain: VECTOR hwirq: 0x3 chip: APIC flags: 0x0 This was developed to simplify the debugging of the managed affinity changes. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Keith Busch <keith.busch@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20170619235444.537566163@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq/irqdomain: Add map counterThomas Gleixner2017-06-221-0/+2
| | | | | | | | | | | | | | | Add a map counter instead of counting radix tree entries for diagnosis. That also gives correct information for linear domains. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Keith Busch <keith.busch@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20170619235444.459397746@linutronix.de
* genirq: Allow fwnode to carry name information onlyThomas Gleixner2017-06-221-1/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to provide proper debug interface it's required to have domain names available when the domain is added. Non fwnode based architectures like x86 have no way to do so. It's not possible to use domain ops or host data for this as domain ops might be the same for several instances, but the names have to be unique. Extend the irqchip fwnode to allow transporting the domain name. If no node is supplied, create a 'unknown-N' placeholder. Warn if an invalid node is supplied and treat it like no node. This happens e.g. with i2 devices on x86 which hand in an ACPI type node which has no interface for retrieving the name. [ Folded a fix from Marc to make DT name parsing work ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Keith Busch <keith.busch@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20170619235443.588784933@linutronix.de
* irqdomain: Add empty irq_domain_check_msi_remapMian Yousaf Kaukab2017-03-061-0/+4
| | | | | | | | | | | Fix following build error for s390: drivers/vfio/vfio_iommu_type1.c: In function 'vfio_iommu_type1_attach_group': drivers/vfio/vfio_iommu_type1.c:1290:25: error: implicit declaration of function 'irq_domain_check_msi_remap' Acked-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
* irqdomain: irq_domain_check_msi_remapEric Auger2017-01-231-0/+1
| | | | | | | | | | | | | | | | | | | | | This new function checks whether all MSI irq domains implement IRQ remapping. This is useful to understand whether VFIO passthrough is safe with respect to interrupts. On ARM typically an MSI controller can sit downstream to the IOMMU without preventing VFIO passthrough. As such any assigned device can write into the MSI doorbell. In case the MSI controller implements IRQ remapping, assigned devices will not be able to trigger interrupts towards the host. On the contrary, the assignment must be emphasized as unsafe with respect to interrupts. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
* irqdomain: Add irq domain MSI and MSI_REMAP flagsEric Auger2017-01-231-0/+35
| | | | | | | | | | | | | | | | | | | | | | We introduce two new enum values for the irq domain flag: - IRQ_DOMAIN_FLAG_MSI indicates the irq domain corresponds to an MSI domain - IRQ_DOMAIN_FLAG_MSI_REMAP indicates the irq domain has MSI remapping capabilities. Those values will be useful to check all MSI irq domains have MSI remapping support when assessing the safety of IRQ assignment to a guest. irq_domain_hierarchical_is_msi_remap() allows to check if an irq domain or any parent implements MSI remapping. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
* Merge branch 'irq/for-block' into irq/coreThomas Gleixner2016-07-041-3/+6
|\ | | | | | | | | Pull the irq affinity managing code which is in a seperate branch for block developers to pull.
| * genirq: Add affinity hint to irq allocationThomas Gleixner2016-07-041-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an extra argument to the irq(domain) allocation functions, so we can hand down affinity hints to the allocator. Thats necessary to implement proper support for multiqueue devices. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Christoph Hellwig <hch@lst.de> Cc: linux-block@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: linux-nvme@lists.infradead.org Cc: axboe@fb.com Cc: agordeev@redhat.com Link: http://lkml.kernel.org/r/1467621574-8277-4-git-send-email-hch@lst.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | irqdomain: Don't set type when mapping an IRQJon Hunter2016-06-131-0/+3
|/ | | | | | | | | | | | | | | | | | | | | | | | Some IRQ chips, such as GPIO controllers or secondary level interrupt controllers, may require require additional runtime power management control to ensure they are accessible. For such IRQ chips, it makes sense to enable the IRQ chip when interrupts are requested and disabled them again once all interrupts have been freed. When mapping an IRQ, the IRQ type settings are read and then programmed. The mapping of the IRQ happens before the IRQ is requested and so the programming of the type settings occurs before the IRQ is requested. This is a problem for IRQ chips that require additional power management control because they may not be accessible yet. Therefore, when mapping the IRQ, don't program the type settings, just save them and then program these saved settings when the IRQ is requested (so long as if they are not overridden via the call to request the IRQ). Add a stub function for irq_domain_free_irqs() to avoid any compilation errors when CONFIG_IRQ_DOMAIN_HIERARCHY is not selected. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
* irqdomain: Allow domain matching on irq_fwspecMarc Zyngier2016-05-021-1/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When iterating over the irq domain list, we try to match a domain either by calling a match() function or by comparing a number of fields passed as parameters. Both approaches are a bit restrictive: - match() is DT specific and only takes a device node - the fallback case only deals with the fwnode_handle It would be useful if we had a per-domain function that would actually perform the matching check on the whole of the irq_fwspec structure. This would allow for a domain to triage matching attempts that need to extend beyond the fwnode. Let's introduce irq_find_matching_fwspec(), which takes a full blown irq_fwspec structure, and call into a select() function implemented by the irqdomain. irq_find_matching_fwnode() is made a wrapper around irq_find_matching_fwspec in order to preserve compatibility. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Will Deacon <will.deacon@arm.com> Cc: Rob Herring <robh+dt@kernel.org> Link: http://lkml.kernel.org/r/1460365075-7316-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Add error code reporting to irq_{reserve,destroy}_ipiMatt Redfearn2016-05-021-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make these functions return appropriate error codes when something goes wrong. Previously irq_destroy_ipi returned void making it impossible to notify the caller if the request could not be fulfilled. Patch 1 in the series added another condition in which this could fail in addition to the existing ones. irq_reserve_ipi returned an unsigned int meaning it could only return 0 on failure and give the caller no indication as to why the request failed. As time goes on there are likely to be further conditions added in which these functions can fail. These APIs and the IPI IRQ domain are new in 4.6 and the number of existing call sites are low, changing the API now has little impact on the code, while making it easier for these functions to grow over time. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: linux-mips@linux-mips.org Cc: jason@lakedaemon.net Cc: marc.zyngier@arm.com Cc: ralf@linux-mips.org Cc: Qais Yousef <qsyousef@gmail.com> Cc: lisa.parratt@imgtec.com Cc: jiang.liu@linux.intel.com Link: http://lkml.kernel.org/r/1461568464-31701-2-git-send-email-matt.redfearn@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Make irq_destroy_ipi take a cpumask of IPIs to destroyMatt Redfearn2016-05-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Previously irq_destroy_ipi() would destroy IPIs to all CPUs that were configured by irq_reserve_ipi(). This change makes it possible to destroy just a subset of the IPIs. This may be useful to remove IPIs to CPUs that have been hot removed so that the IRQ numbers allocated within the IPI domain can be re-used. The original behaviour is restored by passing the complete mask that the IPI was created with. There are currently no users of this function that would break from the API change. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: linux-mips@linux-mips.org Cc: jason@lakedaemon.net Cc: marc.zyngier@arm.com Cc: ralf@linux-mips.org Cc: Qais Yousef <qsyousef@gmail.com> Cc: lisa.parratt@imgtec.com Cc: jiang.liu@linux.intel.com Link: http://lkml.kernel.org/r/1461568464-31701-1-git-send-email-matt.redfearn@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge tag 'staging-4.6-rc1' of ↵Linus Torvalds2016-03-171-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging driver updates from Greg KH: "Here is the big staging driver pull request for 4.6-rc1. Lots of little things here, over 1600 patches or so. Notable is all of the good Lustre work happening, those developers have finally woken up and are cleaning up their code greatly. The Outreachy intern application process is also happening, which brought in another 400 or so patches. Full details are in the very long shortlog. All of these have been in linux-next with no reported issues" * tag 'staging-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1673 commits) staging: lustre: fix aligments in lnet selftest staging: lustre: report minimum of two buffers for LNet selftest load test staging: lustre: test for proper errno code in lstcon_rpc_trans_abort staging: lustre: filter remaining extra spacing for lnet selftest staging: lustre: remove extra spacing when setting variable for lnet selftest staging: lustre: remove extra spacing of variable declartions for lnet selftest staging: lustre: fix spacing issues checkpatch reported in lnet selftest staging: lustre: remove returns in void function for lnet selftest staging: lustre: fix bogus lst errors for lnet selftest staging: netlogic: Replacing pr_err with dev_err after the call to devm_kzalloc staging: mt29f_spinand: Replacing pr_info with dev_info after the call to devm_kzalloc staging: android: ion: fix up file mode staging: ion: debugfs invalid gfp mask staging: rts5208: Replace pci_enable_device with pcim_enable_device Staging: ieee80211: Place constant on right side of the test. staging: speakup: Replace del_timer with del_timer_sync staging: lowmemorykiller: fix 2 checks that checkpatch complained staging: mt29f_spinand: Drop void pointer cast staging: rdma: hfi1: file_ops: Replace ALIGN with PAGE_ALIGN staging: rdma: hfi1: driver: Replace IS_ALIGNED with PAGE_ALIGNED ...
| * irqdomain: Added domain bus token DOMAIN_BUS_FSL_MC_MSIJ. German Rivera2016-02-071-0/+1
| | | | | | | | | | | | | | | | | | Since an FSL-MC bus is a new bus type that is neither PCI nor PLATFORM, we need a new domain bus token to disambiguate the IRQ domain for FSL-MC MSIs. Signed-off-by: J. German Rivera <German.Rivera@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | genirq: Add a new generic IPI reservation code to irq coreQais Yousef2016-02-251-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a generic mechanism to dynamically allocate an IPI. Depending on the underlying implementation this creates either a single Linux irq or a consective range of Linux irqs. The Linux irq is used later to send IPIs to other CPUs. [ tglx: Massaged the code and removed the 'consecutive mask' restriction for the single IRQ case ] Signed-off-by: Qais Yousef <qais.yousef@imgtec.com> Cc: <jason@lakedaemon.net> Cc: <marc.zyngier@arm.com> Cc: <jiang.liu@linux.intel.com> Cc: <ralf@linux-mips.org> Cc: <linux-mips@linux-mips.org> Cc: <lisa.parratt@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Link: http://lkml.kernel.org/r/1449580830-23652-9-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | genirq: Make irq_domain_alloc_descs() non staticQais Yousef2016-02-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We will need to use this function to implement irq_reserve_ipi() later. So make it non static and move the prototype to irqdomain.h to allow using it outside irqdomain.c Signed-off-by: Qais Yousef <qais.yousef@imgtec.com> Cc: <jason@lakedaemon.net> Cc: <marc.zyngier@arm.com> Cc: <jiang.liu@linux.intel.com> Cc: <ralf@linux-mips.org> Cc: <linux-mips@linux-mips.org> Cc: <lisa.parratt@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Link: http://lkml.kernel.org/r/1449580830-23652-8-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | genirq: Add DOMAIN_BUS_IPIQais Yousef2016-02-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need a way to search and match IPI domains. Using the new enum we can use irq_find_matching_host() to do that. Signed-off-by: Qais Yousef <qais.yousef@imgtec.com> Cc: <jason@lakedaemon.net> Cc: <marc.zyngier@arm.com> Cc: <jiang.liu@linux.intel.com> Cc: <ralf@linux-mips.org> Cc: <linux-mips@linux-mips.org> Cc: <lisa.parratt@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Link: http://lkml.kernel.org/r/1449580830-23652-3-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | genirq: Add new IPI irqdomain flagsQais Yousef2016-02-251-0/+37
|/ | | | | | | | | | | | | | | | | | | These flags will be used to identify an IPI domain. We have two flavours of IPI implementations: IRQ_DOMAIN_FLAG_IPI_PER_CPU: Each CPU has its own virq and hwirq IRQ_DOMAIN_FLAG_IPI_SINGLE : A single virq and hwirq for all CPUs Signed-off-by: Qais Yousef <qais.yousef@imgtec.com> Cc: <jason@lakedaemon.net> Cc: <marc.zyngier@arm.com> Cc: <jiang.liu@linux.intel.com> Cc: <ralf@linux-mips.org> Cc: <linux-mips@linux-mips.org> Cc: <lisa.parratt@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Link: http://lkml.kernel.org/r/1449580830-23652-2-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Allow domain lookup with DOMAIN_BUS_WIRED tokenMarc Zyngier2016-01-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's take the (outlandish) example of an interrupt controller capable of handling both wired interrupts and PCI MSIs. With the current code, the PCI MSI domain is going to be tagged with DOMAIN_BUS_PCI_MSI, and the wired domain with DOMAIN_BUS_ANY. Things get hairy when we start looking up the domain for a wired interrupt (typically when creating it based on some firmware information - DT or ACPI). In irq_create_fwspec_mapping(), we perform the lookup using DOMAIN_BUS_ANY, which is actually used as a wildcard. This gives us one chance out of two to end up with the wrong domain, and we try to configure a wired interrupt with the MSI domain. Everything grinds to a halt pretty quickly. What we really need to do is to start looking for a domain that would uniquely identify a wired interrupt domain, and only use DOMAIN_BUS_ANY as a fallback. In order to solve this, let's introduce a new DOMAIN_BUS_WIRED token, which is going to be used exactly as described above. Of course, this depends on the irqchip to setup the domain bus_token, and nobody had to implement this so far. Only so far. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Link: http://lkml.kernel.org/r/1453816347-32720-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge branch 'irq/gic-v2m-acpi' of ↵Thomas Gleixner2015-12-291-0/+10
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core Pull another round of GIC changes from Marc: ACPI support for GIV-v2m
| * irqdomain: Introduce is_fwnode_irqchip helperSuravee Suthikulpanit2015-12-211-0/+5
| | | | | | | | | | | | | | | | | | | | Since there will be several places checking if fwnode.type is equal FWNODE_IRQCHIP, this patch adds a convenient function for this purpose. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| * acpi: pci: Setup MSI domain for ACPI based pci devicesSuravee Suthikulpanit2015-12-211-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces pci_msi_register_fwnode_provider() for irqchip to register a callback, to provide a way to determine appropriate MSI domain for a pci device. It also introduces pci_host_bridge_acpi_msi_domain(), which returns the MSI domain of the specified PCI host bridge with DOMAIN_BUS_PCI_MSI bus token. Then, it is assigned to pci device. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
* | irqdomain: Make irq_domain_alloc_irqs_recursive availableMarc Zyngier2015-12-161-0/+3
|/ | | | | | | | | We are soon going to need the MSI layer to call into the domain allocators. Instead of open coding this, make the standard irq_domain_alloc_irqs_recursive function available to the MSI layer. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
* irqdomain: Documentation updatesMarc Zyngier2015-10-131-13/+10
| | | | | | | | | | | | | | | | | | | Update the IRQ domain documentation to reflect the changes made while divorcing the domain infrastructure from Device Tree. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-18-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Introduce irq_domain_create_hierarchyMarc Zyngier2015-10-131-2/+15
| | | | | | | | | | | | | | | | | | | | | As we're about to start converting the various MSI layers to use fwnode_handle instead of device_node, add irq_domain_create_hierarchy as a directly equivalent of irq_domain_add_hierarchy (which still exists as a compatibility interface). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-16-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Add a fwnode_handle allocatorMarc Zyngier2015-10-131-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to be able to reference an irqdomain from ACPI, we need to be able to create an identifier, which is usually a struct device_node. This device node does't really fit the ACPI infrastructure, so we cunningly allocate a new structure containing a fwnode_handle, and return that. This structure doesn't really point to a device (interrupt controllers are not "real" devices in Linux), but as we cannot really deny that they exist, we create them with a new fwnode_type (FWNODE_IRQCHIP). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-9-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Introduce irq_domain_create_{linear, tree}Marc Zyngier2015-10-131-6/+25
| | | | | | | | | | | | | | | | | | | | | | | | Just like we have irq_domain_add_{linear,tree} to create a irq domain identified by an of_node, introduce irq_domain_create_{linear,tree} that do the same thing, except that they take a struct fwnode_handle. Existing functions get rewritten in terms of the new ones so that everything keeps working as before (and __irq_domain_add is now fwnode_handle based as well). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-8-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Introduce irq_create_fwspec_mappingMarc Zyngier2015-10-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Just like we have irq_create_of_mapping, irq_create_fwspec_mapping creates a IRQ domain mapping for an interrupt described in a struct irq_fwspec. irq_create_of_mapping gets rewritten in terms of the new function, and the hack we introduced before gets removed (now that no stacked irqchip uses of_phandle_args anymore). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-7-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Introduce a firmware-specific IRQ specifier structureMarc Zyngier2015-10-131-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | So far the closest thing to a generic IRQ specifier structure is of_phandle_args, which happens to be pretty OF specific (the of_node pointer in there is quite annoying). Let's introduce 'struct irq_fwspec' that can be used in place of of_phandle_args for OF, but also for other firmware implementations (that'd be ACPI). This is used together with a new 'translate' method that is the pendent of 'xlate'. We convert irq_create_of_mapping to use this new structure (with a small hack that will be removed later). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-5-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Allow irq domain lookup by fwnodeMarc Zyngier2015-10-131-2/+9
| | | | | | | | | | | | | | | | | | | | | | So far, our irq domains are still looked up by device node. Let's change this and allow a domain to be looked up using a fwnode_handle pointer. The existing interfaces are preserved with a couple of helpers. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-4-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Convert irqdomain-%3Eof_node to fwnodeMarc Zyngier2015-10-131-2/+3
| | | | | | | | | | | | | | | | | | | | | | | Now that we have everyone accessing the of_node field via the irq_domain_get_of_node accessor, it is pretty easy to swap it for a pointer to a fwnode_handle. This translates into a few limited changes in __irq_domain_add, and an updated irq_domain_get_of_node. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Add an accessor for the of_node fieldMarc Zyngier2015-10-091-0/+5
| | | | | | | | | | | | As we're about to remove the of_node field from the irqdomain structure, introduce an accessor for it. Subsequent patches will take care of the actual repainting. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1444402211-1141-1-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Add DOMAIN_BUS_NEXUS irqdomain propertyMarc Zyngier2015-07-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | Some IRQ domains are not designed to directly provide interrupts to devices, but strictly to be used by other domains. An example of this is the GICv3 ITS, which is completely bus agnostic, and on which it is possible to implement a PCI/MSI domain. Just introduce the irq_domain_bus_token property for now. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-11-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* of/platform: Assign MSI domain to platform deviceMarc Zyngier2015-07-301-0/+1
| | | | | | | | | | | | | | | | | | As for PCI, we're able to populate the msi_domain field at probe time, provided that the device tree has an "msi-parent" property. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-9-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* PCI/MSI: Register irq domain with specific tokenMarc Zyngier2015-07-301-0/+1
| | | | | | | | | | | | | | | | | | When creating a PCI/MSI domain, tag it with DOMAIN_BUS_PCI_MSI so that it can be looked-up using irq_find_matching_host(). Acked-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq/irqdomain: Allow irq domain aliasingMarc Zyngier2015-07-301-2/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is not uncommon (at least with the ARM stuff) to have a piece of hardware that implements different flavours of "interrupts". A typical example of this is the GICv3 ITS, which implements standard PCI/MSI support, but also some form of "generic MSI". So far, the PCI/MSI domain is registered using the ITS device_node, so that irq_find_host can return it. On the contrary, the raw MSI domain is not registered with an device_node, making it impossible to be looked up by another subsystem (obviously, using the same device_node twice would only result in confusion, as it is not defined which one irq_find_host would return). A solution to this is to "type" domains that may be aliasing, and to be able to lookup an device_node that matches a given type. For this, we introduce irq_find_matching_host() as a superset of irq_find_host: struct irq_domain *irq_find_matching_host(struct device_node *node, enum irq_domain_bus_token bus_token); where bus_token is the "type" we want to match the domain against (so far, only DOMAIN_BUS_ANY is defined). This result in some moderately invasive changes on the PPC side (which is the only user of the .match method). This has otherwise no functionnal change. Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Add non-hierarchy helper irq_domain_set_infoStefan Agner2015-05-181-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | This adds the helper irq_domain_set_info() in a non-domain hierarchy variant. This allows to use the helper for generic chip since not all chips using generic chip support domain hierarchy. Signed-off-by: Stefan Agner <stefan@agner.ch> Cc: marc.zyngier@arm.com Cc: linux@arm.linux.org.uk Cc: u.kleine-koenig@pengutronix.de Cc: olof@lixom.net Cc: arnd@arndb.de Cc: daniel.lezcano@linaro.org Cc: mark.rutland@arm.com Cc: pawel.moll@arm.com Cc: robh+dt@kernel.org Cc: ijc+devicetree@hellion.org.uk Cc: galak@codeaurora.org Cc: mcoquelin.stm32@gmail.com Cc: linux-arm-kernel@lists.infradead.org Cc: shawn.guo@linaro.org Cc: kernel@pengutronix.de Cc: jason@lakedaemon.net Link: http://lkml.kernel.org/r/1431769465-26867-2-git-send-email-stefan@agner.ch Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Introduce helper function irq_domain_add_hierarchy()Jiang Liu2014-11-231-0/+4
| | | | | | | | | | | | | | | | | | | | Introduce helper function irq_domain_add_hierarchy(), which creates a linear irqdomain if parameter 'size' is not zero, otherwise creates a tree irqdomain. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: http://lkml.kernel.org/r/1416061447-9472-5-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Implement a method to automatically call parent domains alloc/freeJiang Liu2014-11-231-15/+9
| | | | | | | | | | | | | | | | | | | | Add a flags to irq_domain.flags to control whether the irqdomain core should automatically call parent irqdomain's alloc/free callbacks. It help to reduce hierarchy irqdomains users' code size. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: http://lkml.kernel.org/r/1416061447-9472-4-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Introduce helper irq_domain_set_info() to reduce duplicated codeJiang Liu2014-11-231-0/+5
| | | | | | | | | | Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: Introduce new interfaces to support hierarchy irqdomainsJiang Liu2014-11-231-0/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We plan to use hierarchy irqdomain to suppport CPU vector assignment, interrupt remapping controller, IO-APIC controller, MSI interrupt and hypertransport interrupt etc on x86 platforms. So extend irqdomain interfaces to support hierarchy irqdomain. There are already many clients of current irqdomain interfaces. To minimize the changes, we choose to introduce new version 2 interfaces to support hierarchy instead of extending existing irqdomain interfaces. According to Thomas's suggestion, the most important design decision is to build hierarchy struct irq_data to support hierarchy irqdomain, so hierarchy irqdomain related data could be saved in struct irq_data. With support of hierarchy irq_data, we could also support stacked irq_chips. This is most useful in case of set_affinity(). The new hierarchy irqdomain introduces following interfaces: 1) irq_domain_alloc_irqs()/irq_domain_free_irqs(): allocate/release IRQ and related resources. 2) __irq_domain_alloc_irqs(): a special version to support legacy IRQs. 3) irq_domain_activate_irq()/irq_domain_deactivate_irq(): program interrupt controllers to activate/deactivate interrupt. There are also several help functions to ease irqdomain implemenations: 1) irq_domain_get_irq_data(): get irq_data associated with a specific irqdomain. 2) irq_domain_set_hwirq_and_chip(): save irqdomain specific data into irq_data. 3) irq_domain_alloc_irqs_parent()/irq_domain_free_irqs_parent(): invoke parent irqdomain's alloc/free callbacks. We also changed irq_startup()/irq_shutdown() to invoke irq_domain_activate_irq()/irq_domain_deactivate_irq() to program interrupt controller when start/stop interrupts. [ tglx: Folded parts of the later patch series in ] Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Export irq_domain_disassociate() to architecture interrupt driversJiang Liu2014-06-211-0/+2
| | | | | | | | | | | | | | | | | | | | Export irq_domain_disassociate() to architecture interrupt drivers, so it could be used to handle legacy IRQ descriptors on x86. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1402302011-23642-37-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* irqdomain: make irq_linear_revmap() a fast path againGrant Likely2013-06-241-3/+16
| | | | | | | | | | | | Over the years, irq_linear_revmap() gained tests and checks to make sure callers were using it safely, which while important, also make it less of a fast path. After the irqdomain refactoring done recently, it is now possible to make irq_linear_revmap() a fast path again. This patch moves irq_linear_revmap() to the header file and makes it a static inline so that interrupt controller drivers using a linear mapping can decode the virq from a hwirq in just a couple of instructions. Signed-off-by: Grant Likely <grant.likely@linaro.org>
* irqdomain: remove irq_domain_generate_simple()Grant Likely2013-06-241-8/+0
| | | | | | Nobody calls it; remove the function Signed-off-by: Grant Likely <grant.likely@linaro.org>
* irqdomain: Refactor irq_domain_associate_many()Grant Likely2013-06-241-13/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Originally, irq_domain_associate_many() was designed to unwind the mapped irqs on a failure of any individual association. However, that proved to be a problem with certain IRQ controllers. Some of them only support a subset of irqs, and will fail when attempting to map a reserved IRQ. In those cases we want to map as many IRQs as possible, so instead it is better for irq_domain_associate_many() to make a best-effort attempt to map irqs, but not fail if any or all of them don't succeed. If a caller really cares about how many irqs got associated, then it should instead go back and check that all of the irqs is cares about were mapped. The original design open-coded the individual association code into the body of irq_domain_associate_many(), but with no longer needing to unwind associations, the code becomes simpler to split out irq_domain_associate() to contain the bulk of the logic, and irq_domain_associate_many() to be a simple loop wrapper. This patch also adds a new error check to the associate path to make sure it isn't called for an irq larger than the controller can handle, and adds locking so that the irq_domain_mutex is held while setting up a new association. v3: Fixup missing change to irq_domain_add_tree() v2: Fixup x86 warning. irq_domain_associate_many() no longer returns an error code, but reports errors to the printk log directly. In the majority of cases we don't actually want to fail if there is a problem, but rather log it and still try to boot the system. Signed-off-by: Grant Likely <grant.likely@linaro.org> irqdomain: Fix flubbed irq_domain_associate_many refactoring commit d39046ec72, "irqdomain: Refactor irq_domain_associate_many()" was missing the following hunk which causes a boot failure on anything using irq_domain_add_tree() to allocate an irq domain. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Michael Neuling <mikey@neuling.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Cc: Thomas Gleixner <tglx@linutronix.de>, Cc: Stephen Rothwell <sfr@canb.auug.org.au>
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