summaryrefslogtreecommitdiffstats
path: root/kernel/irq/settings.h (follow)
Commit message (Collapse)AuthorAgeFilesLines
* genirq: Add support for per-cpu dev_id interruptsMarc Zyngier2011-10-031-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ARM GIC interrupt controller offers per CPU interrupts (PPIs), which are usually used to connect local timers to each core. Each CPU has its own private interface to the GIC, and only sees the PPIs that are directly connect to it. While these timers are separate devices and have a separate interrupt line to a core, they all use the same IRQ number. For these devices, request_irq() is not the right API as it assumes that an IRQ number is visible by a number of CPUs (through the affinity setting), but makes it very awkward to express that an IRQ number can be handled by all CPUs, and yet be a different interrupt line on each CPU, requiring a different dev_id cookie to be passed back to the handler. The *_percpu_irq() functions is designed to overcome these limitations, by providing a per-cpu dev_id vector: int request_percpu_irq(unsigned int irq, irq_handler_t handler, const char *devname, void __percpu *percpu_dev_id); void free_percpu_irq(unsigned int, void __percpu *); int setup_percpu_irq(unsigned int irq, struct irqaction *new); void remove_percpu_irq(unsigned int irq, struct irqaction *act); void enable_percpu_irq(unsigned int irq); void disable_percpu_irq(unsigned int irq); The API has a number of limitations: - no interrupt sharing - no threading - common handler across all the CPUs Once the interrupt is requested using setup_percpu_irq() or request_percpu_irq(), it must be enabled by each core that wishes its local interrupt to be delivered. Based on an initial patch by Thomas Gleixner. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1316793788-14500-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Support per-IRQ thread disabling.Paul Mundt2011-04-231-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for disabling threading on a per-IRQ basis via the IRQ status instead of the IRQ flow, which is necessary for interrupts that don't follow the natural IRQ flow channels, such as those that are virtually created. The new APIs added are simply: irq_set_thread() irq_set_nothread() which follow the rest of the IRQ status routines. Chained handlers also have IRQ_NOTHREAD set on them automatically, making the lack of threading explicit rather than implicit. Subsequently, the nothread flag can be viewed through the standard genirq debugging facilities. [ tglx: Fixed cleanup fallout ] Signed-off-by: Paul Mundt <lethal@linux-sh.org> Link: http://lkml.kernel.org/r/%3C20110406210135.GF18426%40linux-sh.org%3E Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Remove compat codeThomas Gleixner2011-03-291-34/+21
| | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Remove desc->status when GENERIC_HARDIRQS_NO_COMPAT=yThomas Gleixner2011-02-191-0/+1
| | | | | | | | | | | | | | | If everything uses the right accessors, then enabling GENERIC_HARDIRQS_NO_COMPAT should just work. If not it will tell you. Don't be lazy and use the trick which I use in the core code! git grep status_use_accessors will unearth it in a split second. Offenders are tracked down and not slapped with stinking trouts. This time we use frozen shark for a better educational value. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Cleanup irq.hThomas Gleixner2011-02-191-16/+0
| | | | | | Put the constants into an enum and document them. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Force wrapped access to desc->status in core codeThomas Gleixner2011-02-191-0/+3
| | | | | | Force the usage of wrappers by another nasty CPP substitution. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Wrap the remaning IRQ_* flagsThomas Gleixner2011-02-191-0/+58
| | | | | | Use wrappers to keep them away from the core code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Mirror irq trigger type bits in irq_data.stateThomas Gleixner2011-02-191-0/+30
| | | | | | | | | | | | | | | | | That's the data structure chip functions get provided. Also allow them to signal the core code that they updated the flags in irq_data.state by returning IRQ_SET_MASK_OK_NOCOPY. The default is unchanged. The type bits should be accessed via: val = irqd_get_trigger_type(irqdata); and irqd_set_trigger_type(irqdata, val); Coders who access them directly will be tracked down and slapped with stinking trouts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Move IRQ_AFFINITY_SET to coreThomas Gleixner2011-02-191-0/+2
| | | | | | Keep status in sync until last abuser is gone. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Mirror IRQ_PER_CPU and IRQ_NO_BALANCING in irq_data.stateThomas Gleixner2011-02-191-0/+36
| | | | | | | | | | | | | | That's the right data structure to look at for arch code. Accessor functions are provided. irqd_is_per_cpu(irqdata); irqd_can_balance(irqdata); Coders who access them directly will be tracked down and slapped with stinking trouts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Add IRQ_MOVE_PENDING to irq_data.stateThomas Gleixner2011-02-191-0/+2
| | | | | | | | | | | | chip implementations need to know about it. Keep status in sync until all users are fixed. Accessor function: irqd_is_setaffinity_pending(irqdata) Coders who access them directly will be tracked down and slapped with stinking trouts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Move IRQ_WAKEUP to coreThomas Gleixner2011-02-191-0/+2
| | | | | | No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Move IRQ_MASKED to coreThomas Gleixner2011-02-191-0/+2
| | | | | | Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Move IRQ_PENDING flag to coreThomas Gleixner2011-02-191-0/+2
| | | | | | Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Move IRQ_DISABLED to coreThomas Gleixner2011-02-191-0/+2
| | | | | | Keep status in sync until all abusers are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Move IRQ_REPLAY and IRQ_WAITING to coreThomas Gleixner2011-02-191-0/+4
| | | | | | No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Add IRQ_INPROGRESS to coreThomas Gleixner2011-02-191-0/+3
| | | | | | | | | | | | | We need to maintain the flag for now in both fields status and istate. Add a CONFIG_GENERIC_HARDIRQS_NO_COMPAT switch to allow testing w/o the status one. Wrap the access to status IRQ_INPROGRESS in a inline which can be turned of with CONFIG_GENERIC_HARDIRQS_NO_COMPAT along with the define. There is no reason that anything outside of core looks at this. That needs some modifications, but we'll get there. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Protect tglx from tripping over his own feetThomas Gleixner2011-02-191-0/+7
The irq_desc.status field will either go away or renamed to settings. Anyway we need to maintain compatibility to avoid breaking the world and some more. While moving bits into the core, I need to avoid that I use any of the still existing IRQ_ bits in the core code by typos. So that file will hold the inline wrappers and some nasty CPP tricks to break the build when typoed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 18:27:46 +0100