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2011-02-19genirq: Add IRQCHIP_SET_TYPE_MASKED flagThomas Gleixner
irq_chips, which require to mask the chip before changing the trigger type should set this flag. So the core takes care of it and the requirement for looking into desc->status in the chip goes away. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Lars-Peter Clausen <lars@metafoo.de>
2011-02-19genirq: Add flags to irq_chipThomas Gleixner
Looking through irq_chip implementations I noticed that some of them have special requirements, like setting the type masked and therefor fiddle in irq_desc->status. Add a flag field, so the core code can handle it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Cleanup irq.hThomas Gleixner
Put the constants into an enum and document them. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Force wrapped access to desc->status in core codeThomas Gleixner
Force the usage of wrappers by another nasty CPP substitution. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Wrap the remaning IRQ_* flagsThomas Gleixner
Use wrappers to keep them away from the core code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Mirror irq trigger type bits in irq_data.stateThomas Gleixner
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>
2011-02-19genirq: Move IRQ_AFFINITY_SET to coreThomas Gleixner
Keep status in sync until last abuser is gone. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Reuse existing can set affinty checkThomas Gleixner
Add a !desc check while at it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Mirror IRQ_PER_CPU and IRQ_NO_BALANCING in irq_data.stateThomas Gleixner
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>
2011-02-19genirq: Move debug code to separate headerThomas Gleixner
It'll break when I'm going to undefine the constants. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Remove CHECK_IRQ_PER_CPU from core codeThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Make CHECK_IRQ_PER_CPU an inline and deprecate itThomas Gleixner
Its' too ugly and needs to go. The only users are core code and parisc. Core code does not need it and parisc gets a new check once IRQ_PER_CPU is reflected in irq_data.state. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Remove CONFIG_IRQ_PER_CPUThomas Gleixner
The saving of this switch is minimal versus the ifdef mess it creates. Simple enable PER_CPU unconditionally and remove the config switch. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Add IRQ_MOVE_PENDING to irq_data.stateThomas Gleixner
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>
2011-02-19genirq: Add state field to irq_dataThomas Gleixner
Some chip implementations need to access certain status flags. With sparse irqs that requires a lookup of the irq descriptor. Add a state field which contains such flags. Name it in a way which will make coders happy to access it with the proper accessor functions. And it's easy to grep for. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_WAKEUP to coreThomas Gleixner
No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_SUSPENDED to coreThomas Gleixner
No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_MASKED to coreThomas Gleixner
Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_PENDING flag to coreThomas Gleixner
Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_DISABLED to coreThomas Gleixner
Keep status in sync until all abusers are fixed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_REPLAY and IRQ_WAITING to coreThomas Gleixner
No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_ONESHOT to coreThomas Gleixner
No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Add IRQ_INPROGRESS to coreThomas Gleixner
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>
2011-02-19genirq: Move IRQ_POLL_INPROGRESS to coreThomas Gleixner
No users outside of core. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use modify_status for set_irq_nested_threadThomas Gleixner
No need for a separate function in the core code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_SPURIOUS_DISABLED to core stateThomas Gleixner
No users outside. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Move IRQ_AUTODETECT to internal stateThomas Gleixner
No users outside of core Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Protect tglx from tripping over his own feetThomas Gleixner
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>
2011-02-19genirq: Add internal state field to irq_descThomas Gleixner
That field will contain internal state information which is not going to be exposed to anything outside the core code - except via accessor functions. I'm tired of everyone fiddling in irq_desc.status. core_internal_state__do_not_mess_with_it is clear enough, annoying to type and easy to grep for. Offenders will be tracked down and slapped with stinking trouts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Fixup core code namespace falloutThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Implement generic irq_show_interrupts()Thomas Gleixner
All archs implement show_interrupts() in more or less the same way. That's tons of duplicated code with different bugs with no value. Implement a generic version and deprecate show_interrupts() Unfortunately we need some ifdeffery for !GENERIC_HARDIRQ archs. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Simplify handle_irq_event()Thomas Gleixner
Now that all core users are converted one layer can go. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use handle_irq_event() in the spurious poll codeThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use handle_perpcu_event() in handle_percpu_irq()Thomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use handle_irq_event() in handle_edge_irq()Thomas Gleixner
It's safe to drop the IRQ_INPROGRESS flag between action chain walks as we are protected by desc->lock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use handle_irq_event() in handle_fasteoi_irq()Thomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use handle_irq_event() in handle_level_irq()Thomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Use handle_irq_event() in handle_simple_irq()Thomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Implement handle_irq_event()Thomas Gleixner
Core code replacement for the ugly camel case. It contains all the code which is shared in all handlers. clear status flags set INPROGRESS flag unlock call action chain note_interrupt lock clr INPROGRESS flag Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Do not fiddle with IRQ_MASKED in handle_edge_irq()Thomas Gleixner
IRQ_MASKED is set in mask_ack_irq() anyway. Remove it from handle_edge_irq() to allow simpler ab^HHreuse of that function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20110202212551.918484270@linutronix.de>
2011-02-19genirq: Consolidate IRQ_DISABLEDThomas Gleixner
Handle IRQ_DISABLED consistent. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Remove default magicThomas Gleixner
Now that everything uses the wrappers, we can remove the default functions. None of those functions is performance critical. That makes the IRQ_MASKED flag tracking fully consistent. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Consolidate disable/enableThomas Gleixner
Create irq_disable/enable and use them to keep the flags consistent. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Consolidate startup/shutdown of interruptsThomas Gleixner
Aside of duplicated code some of the startup/shutdown sites do not handle the MASKED/DISABLED flags and the depth field at all. Move that to a helper function and take care of it there. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20110202212551.787481468@linutronix.de>
2011-02-19genirq: Remove bogus conditionalThomas Gleixner
The if (chip->irq_shutdown) check will always evaluate to true, as we fill in chip->irq_shutdown with default_shutdown in irq_chip_set_defaults() if the chip does not provide its own function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <20110202212551.667607458@linutronix.de>
2011-02-19genirq: Move irq thread flags to coreThomas Gleixner
Soleley used in core code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Mark polled irqs and defer the real handlerThomas Gleixner
With the chip.end() function gone we might run into a situation where a poll call runs and the real interrupt comes in, sees IRQ_INPROGRESS and disables the line. That might be a perfect working one, which will then be masked forever. So mark them polled while the poll runs. When the real handler sees IRQ_INPROGRESS it checks the poll flag and waits for the polling to complete. Add the necessary amount of sanity checks to it to avoid deadlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: spurious: Run only one poller at a timeThomas Gleixner
No point in running concurrent pollers which confuse each other by setting PENDING. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Do not poll disabled, percpu and timer interruptsThomas Gleixner
There is no point in polling disabled lines. percpu does not make sense at all because we only poll on the cpu we're currently running on. Also polling per_cpu interrupts is racy as hell. The handler runs without locking so we might get a huge surprise. If the timer interrupt needs polling, then we wont get there anyway. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-19genirq: Fixup poll handlingThomas Gleixner
try_one_irq() contains redundant code and lots of useless checks for shared interrupts. Check for shared before setting IRQ_INPROGRESS and then call handle_IRQ_event() while pending. Shorter version with the same functionality. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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