- Jul 29, 2015
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Thomas Gleixner authored
This is a preparatory patch for moving irq_data struct members. Signed-off-by:
Jiang Liu <jiang.liu@linux.intel.com> Cc: Simon Horman <horms@verge.net.au> Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20150713151626.713278346@linutronix.de Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Jiang Liu authored
This is a preparatory patch for refactoring the internals if irq_data. Signed-off-by:
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Jiang Liu authored
Use accessor irq_data_get_node() to hide struct irq_data implementation detail, so we can move irq_data->node to irq_data_common once all usage sites are fixed. Signed-off-by:
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- Jul 27, 2015
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Thomas Gleixner authored
__irq_set_chip_handler_name_locked() is about to be replaced. Use irq_set_chip_handler_name_locked() instead. Signed-off-by:
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Jiang Liu authored
This is a preparatory patch for moving irq_data struct members. Signed-off-by:
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Thomas Gleixner authored
Chained irq handlers usually set up handler data as well. We now have a function to set both under irq_desc->lock. Replace the two calls with one. Search and conversion was done with coccinelle. Reported-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
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Thomas Gleixner authored
Use irq_set_handler_locked() as it avoids a redundant lookup of the irq descriptor. Search and update was done with coccinelle. Signed-off-by:
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Jiang Liu authored
This is a preparatory patch for moving irq_data struct members. Signed-off-by:
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Jiang Liu authored
This is a preparatory patch for moving irq_data struct members. Signed-off-by:
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Florian Fainelli authored
Our irq-bcm7120-l2 interrupt controller driver utilizes the same handler function for the different parent interrupts it services: UPG_MAIN, UPG_BSC for instance. The problem is that function reads the IRQSTAT register which can combine interrupt causes for different parent interrupts, such that we can end-up in the following situation: - CPU takes an interrupt - bcm7120_l2_intc_irq_handle() reads IRQSTAT - generic_handle_irq() is invoked - there are still pending interrupts flagged in IRQSTAT from a different parent - handle_bad_irq() is invoked for these since they come from a different irq_desc/irq In order to fix this, make sure that we always mask IRQSTAT with the appropriate bits that correspond go the parent interrupt source this is coming from. To simplify things, associate an unique structure per parent interrupt handler to avoid multiplying the number of lookups. Fixes: a5042de2 ("irqchip: bcm7120-l2: Add Broadcom BCM7120-style Level 2 interrupt controller") Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Cc: linux-mips@linux-mips.org Cc: cernekee@gmail.com Cc: jason@lakedaemon.net Cc: bcm-kernel-feedback-list@broadcom.com Cc: gregory.0xf0@gmail.com Cc: computersforpeace@gmail.com Link: http://lkml.kernel.org/r/1437691941-3100-1-git-send-email-f.fainelli@gmail.com Signed-off-by:
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Brian Norris authored
Make use of the new irq_chip_generic suspend/resume callbacks. This is required because if there are no installed child IRQs for this chip, the irq_chip::irq_{suspend,resume} functions will not be called. However, we still need to save/restore the forwarding mask, to enable the top-level GIC interrupt; otherwise, we lose UART output after S3 resume. In addition to refactoring the callbacks, we have to self-initialize the mask cache, since the genirq core also doesn't initialize this until the first child IRQ is installed. The original problem report is described in extra detail here: http://lkml.kernel.org/g/20150619224123.GL4917@ld-irv-0074 Signed-off-by:Brian Norris <computersforpeace@gmail.com> Tested-by:
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Brian Norris authored
Some (admittedly odd) irqchips perform functions that are not directly related to any of their child IRQ lines, and therefore need to perform some tasks during suspend/resume regardless of whether there are any "installed" interrupts for the irqchip. However, the current generic-chip framework does not call the chip's irq_{suspend,resume} when there are no interrupts installed (this makes sense, because there are no irq_data objects for such a call to be made). More specifically, irq-bcm7120-l2 configures both a forwarding mask (which affects other top-level GIC IRQs) and a second-level interrupt mask (for managing its own child interrupts). The former must be saved/restored on suspend/resume, even when there's nothing to do for the latter. This patch adds a new set of suspend/resume hooks to irq_chip_generic, to help represent *chip* suspend/resume, rather than IRQ suspend/resume. These callbacks will always be called for an IRQ chip (regardless of the installed interrupts) and are based on the per-chip irq_chip_generic struct, rather than the per-IRQ irq_data struct. The original problem report is described in extra detail here: http://lkml.kernel.org/g/20150619224123.GL4917@ld-irv-0074 Signed-off-by: -
Nicolas Pitre authored
Init data marked const should be annotated with __initconst for correctness and not __initdata. And for those already __initconst, they should be qualified as const at the compiler level too. This also fixes LTO builds that otherwise fail with section mismatch errors. Signed-off-by:
Nicolas Pitre <nico@linaro.org> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1507241511551.1806@knanqh.ubzr Signed-off-by:
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Bjorn Andersson authored
Export these functions to be able to build the Qualcomm family A PMIC gpio and mpp drivers as modules. [ tglx: Made them GPL exports ] Signed-off-by:
Bjorn Andersson <bjorn.andersson@sonymobile.com> Reviewed-by:
Mark Brown <broonie@kernel.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: <kernel-build-reports@lists.linaro.org> Cc: <linaro-kernel@lists.linaro.org> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Linus Walleij <linus.walleij@linaro.org> Link: http://lkml.kernel.org/r/1437594184-22966-1-git-send-email-bjorn.andersson@sonymobile.com Signed-off-by:
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Sudeep Holla authored
Now that the GIC chip implementation enables IRQCHIP_SKIP_SET_WAKE and IRQCHIP_MASK_ON_SUSPEND by default, the platforms requiring them need not override the irqchip flags as before. This patch removes all the users of gic_set_irqchip_flags and the function itself. Signed-off-by:
Sudeep Holla <sudeep.holla@arm.com> Acked-by:
Linus Walleij <linus.walleij@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Simon Horman <horms@verge.net.au> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Michal Simek <michal.simek@xilinx.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1436971109-20189-2-git-send-email-sudeep.holla@arm.com Signed-off-by:
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Sudeep Holla authored
The GIC controller doesn't provides any facility to configure the wakeup sources. For the same reason, GIC chip implementation can't provide irq_set_wake functionality, but that results in the irqchip core preventing the systems from entering sleep states like "suspend to RAM". The GICv1/v2 controllers support wakeup events. They signal these wakeup events even when CPU interface is disabled which means the wakeup outputs are always enabled with the required logic in always-on domain. An implementation can powerdown the GIC completely, but then the wake-up must be relayed to some control logic within the power controller that acts as wake-up interrupt controller. Setting the IRQCHIP_SKIP_SET_WAKE flags will ensure that the interrupts from GIC can work as wakeup interrupts and resume from suspend-to-{idle, ram}. The wakeup interrupt sources need to use enable_irq_wake() and the irqchip core will then set the IRQD_WAKEUP_STATE flag. Also it's always safer to mask all the non wakeup interrupts are masked at the chip level when suspending. The irqchip infrastructure can handle masking of those interrupts at the chip level. The chip implementation just have to indicate that with IRQCHIP_MASK_ON_SUSPEND. This patch enables IRQCHIP_SKIP_SET_WAKE and IRQCHIP_MASK_ON_SUSPEND so that the irqchip core allows and handles the power managemant wake up modes. Signed-off-by:
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- Jul 26, 2015
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Jiang Liu authored
Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc while we already have a pointer to corresponding irq_desc. Signed-off-by:
Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Link: http://lkml.kernel.org/r/20150713100606.527106283@linutronix.de Signed-off-by:
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Thomas Gleixner authored
Use irq_set_handler_locked() as it avoids a redundant lookup of the irq descriptor. Search and replacement was done with coccinelle. Signed-off-by:
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Thomas Gleixner authored
Chained irq handlers usually set up handler data as well. We now have a function to set both under irq_desc->lock. Replace the two calls with one. Search and conversion was done with coccinelle. Reported-by:
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- Jul 23, 2015
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Jiang Liu authored
Move alloc_msi_entry() from PCI MSI code into generic MSI code, so it can be reused by other generic MSI drivers. Also introduce free_msi_entry() for completeness. Suggested-by:
Stuart Yoder <stuart.yoder@freescale.com>.> Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com> Reviewed-by:
Yijing Wang <wangyijing@huawei.com> Acked-by:
Bjorn Helgaas <bhelgaas@google.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Alexander Gordeev <agordeev@redhat.com> Link: http://lkml.kernel.org/r/1436428847-8886-13-git-send-email-jiang.liu@linux.intel.com Signed-off-by:
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Jiang Liu authored
Reorganize struct msi_desc so it could be reused by other MSI drivers. We have the following layout now: struct msi_desc { /* Shared device/bus independent data */ ... union { /* PCI specific data */ struct { ... }; }; }; We need to have anonymous union and a anonymous structure for the PCI fields, otherwise we would have to change all instances using these fields. For non PCI devices we will enforce a proper namespace and a non anonymous structure. [ tglx: Added proper comments to the structure and massaged changelog ] Signed-off-by: -
Jiang Liu authored
Store 'struct device *' instead of 'struct pci_dev *' in struct msi_desc, so struct msi_desc can be reused by non PCI based MSI drivers. Signed-off-by:
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Jiang Liu authored
Move msi_list from struct pci_dev into struct device, so we can support non-PCI-device based generic MSI interrupts. msi_list is now conditional under CONFIG_GENERIC_MSI_IRQ, which is selected from CONFIG_PCI_MSI, so no functional change for PCI MSI users. Signed-off-by:
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Jiang Liu authored
Use helper functions to access fields in struct msi_desc, so we could easily refine msi_desc later. Signed-off-by:
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Jiang Liu authored
Use helper functions to access fields in struct msi_desc, so we could easily refine struct msi_desc later. Signed-off-by:
David S. Miller <davem@davemloft.net> 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: Stuart Yoder <stuart.yoder@freescale.com> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Eric Snowberg <eric.snowberg@oracle.com> Link: http://lkml.kernel.org/r/1436428847-8886-8-git-send-email-jiang.liu@linux.intel.com Signed-off-by:
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Jiang Liu authored
Use accessor for_each_pci_msi_entry() to access MSI device list, so we could easily move msi_list from struct pci_dev into struct device later. Signed-off-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: xen-devel@lists.xenproject.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Stuart Yoder <stuart.yoder@freescale.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Link: http://lkml.kernel.org/r/1436428847-8886-7-git-send-email-jiang.liu@linux.intel.com Signed-off-by:
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Jiang Liu authored
Use accessor for_each_pci_msi_entry() to access MSI device list, so we could easily move msi_list from struct pci_dev into struct device later. Signed-off-by:
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Jiang Liu authored
Use accessor for_each_pci_msi_entry() to access MSI device list, so we could easily move msi_list from struct pci_dev into struct device later. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.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: Stuart Yoder <stuart.yoder@freescale.com> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Link: http://lkml.kernel.org/r/1436428847-8886-5-git-send-email-jiang.liu@linux.intel.com Signed-off-by:
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Jiang Liu authored
Use accessor for_each_pci_msi_entry() to access MSI device list, so we could easily move msi_list from struct pci_dev into struct device later. Signed-off-by:
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Jiang Liu authored
Use accessor for_each_pci_msi_entry() to access MSI device list, so we could easily move msi_list from struct pci_dev into struct device later. Signed-off-by:
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Jiang Liu authored
Add helper function msi_desc_to_pci_sysdata() to retrieve sysdata from an MSI descriptor. To avoid pulling include/linux/pci.h into include/linux/msi.h, msi_desc_to_pci_sysdata() is implemented as a normal function instead of an inline function. Signed-off-by:
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Wang Long authored
Update the last pr_warning callsite in drivers/irqchip. Signed-off-by:
Wang Long <long.wanglong@huawei.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: <wanglong@laoqinren.net> Cc: <peifeiyue@huawei.com> Cc: <jason@lakedaemon.net> Cc: <kgene@kernel.org> Cc: <k.kozlowski@samsung.com> Link: http://lkml.kernel.org/r/1437466261-147373-1-git-send-email-long.wanglong@huawei.com Signed-off-by:
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Felipe Balbi authored
As it turns out the current IRQ number will *always* be available from SIR register which renders the reads of PENDING registers as plain unnecessary overhead. In order to catch any situation where SIR reads as zero, we're adding a WARN() to turn it into a very verbose error and users actually report it. With this patch average running time of omap_intc_handle_irq() reduced from about 28.5us to 19.8us as measured by the kernel function profiler. Tested with BeagleBoneBlack Rev A5C. Tested-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
Felipe Balbi <balbi@ti.com> Cc: Linux ARM Kernel Mailing List <linux-arm-kernel@lists.infradead.org> Link: http://lkml.kernel.org/r/20150720204910.GH5394@saruman.tx.rr.com Signed-off-by:
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- Jul 20, 2015
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Magnus Damm authored
Instead of locally caching the virq as domain_irq simply rely on the IRQ domain code and irq_find_mapping(). This reduces the delta between the IRQC driver and the generic chip implementation. Signed-off-by:
Magnus Damm <damm+renesas@opensource.se> Cc: jason@lakedaemon.net Cc: geert+renesas@glider.be Cc: horms@verge.net.au Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20150720100635.2552.20906.sendpatchset@little-apple Signed-off-by:
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Magnus Damm authored
Use linear IRQ domain instead of irq_domain_add_simple() that also handles non-DT cases. This reduces the delta between the IRQC code and the generic chip implementation. Signed-off-by:
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Magnus Damm authored
IRQF_VALID is not needed on ARM anymore, so get rid of it. Signed-off-by:
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- Jul 17, 2015
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Thomas Gleixner authored
Signed-off-by: -
Thomas Gleixner authored
Chained irq handlers usually set up handler data as well. We now have a function to set both under irq_desc->lock. Replace the two calls with one. Search and conversion was done with coccinelle. Reported-by:
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Jiang Liu authored
Use irq_data_get_msi_desc() to avoid redundant lookup of irq_data while we already have a pointer to corresponding irq_data. Signed-off-by:
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Jiang Liu authored
Use irq_data access helper to access irq_data->msi_desc, so we can move msi_desc from struct irq_data into struct irq_common_data later. Signed-off-by:
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