From c1ee6264280e740a9d3ff3feef38642cf0a57013 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 17 Feb 2011 17:45:15 +0100 Subject: genirq: Prevent access beyond allocated_irqs bitmap Lars-Peter Clausen pointed out: I stumbled upon this while looking through the existing archs using SPARSE_IRQ. Even with SPARSE_IRQ the NR_IRQS is still the upper limit for the number of IRQs. Both PXA and MMP set NR_IRQS to IRQ_BOARD_START, with IRQ_BOARD_START being the number of IRQs used by the core. In various machine files the nr_irqs field of the ARM machine defintion struct is then set to "IRQ_BOARD_START + NR_BOARD_IRQS". As a result "nr_irqs" will greater then NR_IRQS which then again causes the "allocated_irqs" bitmap in the core irq code to be accessed beyond its size overwriting unrelated data. The core code really misses a sanity check there. This went unnoticed so far as by chance the compiler/linker places data behind that bitmap which gets initialized later on those affected platforms. So the obvious fix would be to add a sanity check in early_irq_init() and break all affected platforms. Though that check wants to be backported to stable as well, which will require to fix all known problematic platforms and probably some more yet not known ones as well. Lots of churn. A way simpler solution is to allocate a slightly larger bitmap and avoid the whole churn w/o breaking anything. Add a few warnings when an arch returns utter crap. Reported-by: Lars-Peter Clausen Signed-off-by: Thomas Gleixner Cc: stable@kernel.org # .37 Cc: Haojian Zhuang Cc: Eric Miao Cc: Peter Zijlstra --- kernel/irq/internals.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 4571ae7e085..99c3bc8a6fb 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -3,6 +3,12 @@ */ #include +#ifdef CONFIG_SPARSE_IRQ +# define IRQ_BITMAP_BITS (NR_IRQS + 8196) +#else +# define IRQ_BITMAP_BITS NR_IRQS +#endif + extern int noirqdebug; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) -- cgit v1.2.3-70-g09d2 From 3b8249e759c701c4a82f99d957be651a7657bf6f Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 16:02:20 +0100 Subject: genirq: Do not copy affinity before set While rumaging through arch code I found that there are a few workarounds which deal with the fact that the initial affinity setting from request_irq() copies the mask into irq_data->affinity before the chip code is called. In the normal path we unconditionally copy the mask when the chip code returns 0. Copy after the code is called and add a return code IRQ_SET_MASK_OK_NOCOPY for the chip functions, which prevents the copy. That way we see the real mask when the chip function decided to truncate it further as some arches do. IRQ_SET_MASK_OK is 0, which is the current behaviour. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 11 +++++++++++ kernel/irq/internals.h | 2 +- kernel/irq/manage.c | 47 ++++++++++++++++++++++++++++++++++------------- kernel/irq/proc.c | 2 +- 4 files changed, 47 insertions(+), 15 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index e9f847d56c4..f5e900309d2 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -85,6 +85,17 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, # define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING #endif +/* + * Return value for chip->irq_set_affinity() + * + * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity + * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity + */ +enum { + IRQ_SET_MASK_OK = 0, + IRQ_SET_MASK_OK_NOCOPY, +}; + struct msi_desc; /** diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 99c3bc8a6fb..b5bfa24aa6a 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -43,7 +43,7 @@ static inline void unregister_handler_proc(unsigned int irq, struct irqaction *action) { } #endif -extern int irq_select_affinity_usr(unsigned int irq); +extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); extern void irq_set_thread_affinity(struct irq_desc *desc); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index ade65bfb466..dc95d53df51 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -148,9 +148,12 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask) if (irq_can_move_pcntxt(desc)) { ret = chip->irq_set_affinity(&desc->irq_data, mask, false); - if (!ret) { + switch (ret) { + case IRQ_SET_MASK_OK: cpumask_copy(desc->irq_data.affinity, mask); + case IRQ_SET_MASK_OK_NOCOPY: irq_set_thread_affinity(desc); + ret = 0; } } else { desc->status |= IRQ_MOVE_PENDING; @@ -254,9 +257,12 @@ EXPORT_SYMBOL_GPL(irq_set_affinity_notifier); /* * Generic version of the affinity autoselector. */ -static int setup_affinity(unsigned int irq, struct irq_desc *desc) +static int +setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask) { + struct irq_chip *chip = get_irq_desc_chip(desc); struct cpumask *set = irq_default_affinity; + int ret; /* Excludes PER_CPU and NO_BALANCE interrupts */ if (!irq_can_set_affinity(irq)) @@ -273,13 +279,20 @@ static int setup_affinity(unsigned int irq, struct irq_desc *desc) else desc->status &= ~IRQ_AFFINITY_SET; } - cpumask_and(desc->irq_data.affinity, cpu_online_mask, set); - desc->irq_data.chip->irq_set_affinity(&desc->irq_data, desc->irq_data.affinity, false); + cpumask_and(mask, cpu_online_mask, set); + ret = chip->irq_set_affinity(&desc->irq_data, mask, false); + switch (ret) { + case IRQ_SET_MASK_OK: + cpumask_copy(desc->irq_data.affinity, mask); + case IRQ_SET_MASK_OK_NOCOPY: + irq_set_thread_affinity(desc); + } return 0; } #else -static inline int setup_affinity(unsigned int irq, struct irq_desc *d) +static inline int +setup_affinity(unsigned int irq, struct irq_desc *d, struct cpumask *mask) { return irq_select_affinity(irq); } @@ -288,23 +301,23 @@ static inline int setup_affinity(unsigned int irq, struct irq_desc *d) /* * Called when affinity is set via /proc/irq */ -int irq_select_affinity_usr(unsigned int irq) +int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask) { struct irq_desc *desc = irq_to_desc(irq); unsigned long flags; int ret; raw_spin_lock_irqsave(&desc->lock, flags); - ret = setup_affinity(irq, desc); + ret = setup_affinity(irq, desc, mask); if (!ret) irq_set_thread_affinity(desc); raw_spin_unlock_irqrestore(&desc->lock, flags); - return ret; } #else -static inline int setup_affinity(unsigned int irq, struct irq_desc *desc) +static inline int +setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask) { return 0; } @@ -765,8 +778,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) struct irqaction *old, **old_ptr; const char *old_name = NULL; unsigned long flags; - int nested, shared = 0; - int ret; + int ret, nested, shared = 0; + cpumask_var_t mask; if (!desc) return -EINVAL; @@ -831,6 +844,11 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) new->thread = t; } + if (!alloc_cpumask_var(&mask, GFP_KERNEL)) { + ret = -ENOMEM; + goto out_thread; + } + /* * The following block of code has to be executed atomically */ @@ -876,7 +894,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) new->flags & IRQF_TRIGGER_MASK); if (ret) - goto out_thread; + goto out_mask; } else compat_irq_chip_set_default_handler(desc); #if defined(CONFIG_IRQ_PER_CPU) @@ -903,7 +921,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_NO_BALANCING; /* Set default affinity mask once everything is setup */ - setup_affinity(irq, desc); + setup_affinity(irq, desc, mask); } else if ((new->flags & IRQF_TRIGGER_MASK) && (new->flags & IRQF_TRIGGER_MASK) @@ -956,6 +974,9 @@ mismatch: #endif ret = -EBUSY; +out_mask: + free_cpumask_var(mask); + out_thread: raw_spin_unlock_irqrestore(&desc->lock, flags); if (new->thread) { diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index 6c8a2a9f8a7..a46bd762db4 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -89,7 +89,7 @@ static ssize_t irq_affinity_proc_write(struct file *file, if (!cpumask_intersects(new_value, cpu_online_mask)) { /* Special case for empty set - allow the architecture code to set default SMP affinity. */ - err = irq_select_affinity_usr(irq) ? -EINVAL : count; + err = irq_select_affinity_usr(irq, new_value) ? -EINVAL : count; } else { irq_set_affinity(irq, new_value); err = count; -- cgit v1.2.3-70-g09d2 From fe200ae48ef5c79bf7941fe8046ff9505c570ff6 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 10:34:30 +0100 Subject: genirq: Mark polled irqs and defer the real handler 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 --- include/linux/irq.h | 1 + kernel/irq/chip.c | 26 +++++++++++++++++++------ kernel/irq/internals.h | 11 +---------- kernel/irq/spurious.c | 51 ++++++++++++++++++++++++++++++++++++++------------ 4 files changed, 61 insertions(+), 28 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index f5e900309d2..e32b64ccdc8 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -71,6 +71,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ #define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */ #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ +#define IRQ_POLL_INPROGRESS 0x20000000 /* IRQ poll is in progress */ #define IRQF_MODIFY_MASK \ (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 622b55ac0e0..31258782742 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -448,6 +448,13 @@ out_unlock: } EXPORT_SYMBOL_GPL(handle_nested_irq); +static bool irq_check_poll(struct irq_desc *desc) +{ + if (!(desc->status & IRQ_POLL_INPROGRESS)) + return false; + return irq_wait_for_poll(desc); +} + /** * handle_simple_irq - Simple and software-decoded IRQs. * @irq: the interrupt number @@ -469,7 +476,9 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc) raw_spin_lock(&desc->lock); if (unlikely(desc->status & IRQ_INPROGRESS)) - goto out_unlock; + if (!irq_check_poll(desc)) + goto out_unlock; + desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); kstat_incr_irqs_this_cpu(irq, desc); @@ -510,7 +519,9 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc) mask_ack_irq(desc); if (unlikely(desc->status & IRQ_INPROGRESS)) - goto out_unlock; + if (!irq_check_poll(desc)) + goto out_unlock; + desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); kstat_incr_irqs_this_cpu(irq, desc); @@ -558,7 +569,8 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) raw_spin_lock(&desc->lock); if (unlikely(desc->status & IRQ_INPROGRESS)) - goto out; + if (!irq_check_poll(desc)) + goto out; desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); kstat_incr_irqs_this_cpu(irq, desc); @@ -620,9 +632,11 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) */ if (unlikely((desc->status & (IRQ_INPROGRESS | IRQ_DISABLED)) || !desc->action)) { - desc->status |= (IRQ_PENDING | IRQ_MASKED); - mask_ack_irq(desc); - goto out_unlock; + if (!irq_check_poll(desc)) { + desc->status |= (IRQ_PENDING | IRQ_MASKED); + mask_ack_irq(desc); + goto out_unlock; + } } kstat_incr_irqs_this_cpu(irq, desc); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index b5bfa24aa6a..0eff7e92b1a 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -28,6 +28,7 @@ extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); /* Resending of interrupts :*/ void check_irq_resend(struct irq_desc *desc, unsigned int irq); +bool irq_wait_for_poll(struct irq_desc *desc); #ifdef CONFIG_PROC_FS extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); @@ -47,16 +48,6 @@ extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); extern void irq_set_thread_affinity(struct irq_desc *desc); -#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED -static inline void irq_end(unsigned int irq, struct irq_desc *desc) -{ - if (desc->irq_data.chip && desc->irq_data.chip->end) - desc->irq_data.chip->end(irq); -} -#else -static inline void irq_end(unsigned int irq, struct irq_desc *desc) { } -#endif - /* Inline functions for support of irq chips on slow busses */ static inline void chip_bus_lock(struct irq_desc *desc) { diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 56ff8fffb8b..f749d29bfd8 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -24,13 +24,45 @@ static DEFINE_TIMER(poll_spurious_irq_timer, poll_spurious_irqs, 0, 0); static int irq_poll_cpu; static atomic_t irq_poll_active; +/* + * We wait here for a poller to finish. + * + * If the poll runs on this CPU, then we yell loudly and return + * false. That will leave the interrupt line disabled in the worst + * case, but it should never happen. + * + * We wait until the poller is done and then recheck disabled and + * action (about to be disabled). Only if it's still active, we return + * true and let the handler run. + */ +bool irq_wait_for_poll(struct irq_desc *desc) +{ + if (WARN_ONCE(irq_poll_cpu == smp_processor_id(), + "irq poll in progress on cpu %d for irq %d\n", + smp_processor_id(), desc->irq_data.irq)) + return false; + +#ifdef CONFIG_SMP + do { + raw_spin_unlock(&desc->lock); + while (desc->status & IRQ_INPROGRESS) + cpu_relax(); + raw_spin_lock(&desc->lock); + } while (desc->status & IRQ_INPROGRESS); + /* Might have been disabled in meantime */ + return !(desc->status & IRQ_DISABLED) && desc->action; +#else + return false; +#endif +} + /* * Recovery handler for misrouted interrupts. */ static int try_one_irq(int irq, struct irq_desc *desc, bool force) { struct irqaction *action; - int ok = 0, work = 0; + int ok = 0; raw_spin_lock(&desc->lock); @@ -64,10 +96,9 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) goto out; } - /* Honour the normal IRQ locking */ - desc->status |= IRQ_INPROGRESS; + /* Honour the normal IRQ locking and mark it poll in progress */ + desc->status |= IRQ_INPROGRESS | IRQ_POLL_INPROGRESS; do { - work++; desc->status &= ~IRQ_PENDING; raw_spin_unlock(&desc->lock); if (handle_IRQ_event(irq, action) != IRQ_NONE) @@ -76,14 +107,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) action = desc->action; } while ((desc->status & IRQ_PENDING) && action); - desc->status &= ~IRQ_INPROGRESS; - /* - * If we did actual work for the real IRQ line we must let the - * IRQ controller clean up too - */ - if (work > 1) - irq_end(irq, desc); - + desc->status &= ~(IRQ_INPROGRESS | IRQ_POLL_INPROGRESS); out: raw_spin_unlock(&desc->lock); return ok; @@ -238,6 +262,9 @@ try_misrouted_irq(unsigned int irq, struct irq_desc *desc, void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret) { + if (desc->status & IRQ_POLL_INPROGRESS) + return; + if (unlikely(action_ret != IRQ_HANDLED)) { /* * If we are seeing only the odd spurious IRQ caused by -- cgit v1.2.3-70-g09d2 From 1535dfacbf21c4da1b73fcf07c39913da5bd5581 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 01:55:43 +0100 Subject: genirq: Move irq thread flags to core Soleley used in core code. Signed-off-by: Thomas Gleixner --- include/linux/interrupt.h | 14 -------------- kernel/irq/internals.h | 14 ++++++++++++++ 2 files changed, 14 insertions(+), 14 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 7834726dd95..de97b958f47 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -73,20 +73,6 @@ #define IRQF_TIMER (__IRQF_TIMER | IRQF_NO_SUSPEND) -/* - * Bits used by threaded handlers: - * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run - * IRQTF_DIED - handler thread died - * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed - * IRQTF_AFFINITY - irq thread is requested to adjust affinity - */ -enum { - IRQTF_RUNTHREAD, - IRQTF_DIED, - IRQTF_WARNED, - IRQTF_AFFINITY, -}; - /* * These values can be returned by request_any_context_irq() and * describe the context the interrupt will be run in. diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 0eff7e92b1a..b17c9844040 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -11,6 +11,20 @@ extern int noirqdebug; +/* + * Bits used by threaded handlers: + * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run + * IRQTF_DIED - handler thread died + * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed + * IRQTF_AFFINITY - irq thread is requested to adjust affinity + */ +enum { + IRQTF_RUNTHREAD, + IRQTF_DIED, + IRQTF_WARNED, + IRQTF_AFFINITY, +}; + #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) /* Set default functions for irq_chip structures: */ -- cgit v1.2.3-70-g09d2 From 4699923861513671d3f6ade8efb4e56a9a7ecadf Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 2 Feb 2011 21:41:14 +0000 Subject: genirq: Consolidate startup/shutdown of interrupts 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 Cc: Peter Zijlstra LKML-Reference: <20110202212551.787481468@linutronix.de> --- kernel/irq/autoprobe.c | 10 +++++----- kernel/irq/chip.c | 37 ++++++++++++++++++++----------------- kernel/irq/internals.h | 3 +++ kernel/irq/manage.c | 14 +++++--------- 4 files changed, 33 insertions(+), 31 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 505798f86c3..08947cb6172 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -60,7 +60,7 @@ unsigned long probe_irq_on(void) if (desc->irq_data.chip->irq_set_type) desc->irq_data.chip->irq_set_type(&desc->irq_data, IRQ_TYPE_PROBE); - desc->irq_data.chip->irq_startup(&desc->irq_data); + irq_startup(desc); } raw_spin_unlock_irq(&desc->lock); } @@ -77,7 +77,7 @@ unsigned long probe_irq_on(void) raw_spin_lock_irq(&desc->lock); if (!desc->action && !(desc->status & IRQ_NOPROBE)) { desc->status |= IRQ_AUTODETECT | IRQ_WAITING; - if (desc->irq_data.chip->irq_startup(&desc->irq_data)) + if (irq_startup(desc)) desc->status |= IRQ_PENDING; } raw_spin_unlock_irq(&desc->lock); @@ -99,7 +99,7 @@ unsigned long probe_irq_on(void) /* It triggered already - consider it spurious. */ if (!(status & IRQ_WAITING)) { desc->status = status & ~IRQ_AUTODETECT; - desc->irq_data.chip->irq_shutdown(&desc->irq_data); + irq_shutdown(desc); } else if (i < 32) mask |= 1 << i; @@ -138,7 +138,7 @@ unsigned int probe_irq_mask(unsigned long val) mask |= 1 << i; desc->status = status & ~IRQ_AUTODETECT; - desc->irq_data.chip->irq_shutdown(&desc->irq_data); + irq_shutdown(desc); } raw_spin_unlock_irq(&desc->lock); } @@ -182,7 +182,7 @@ int probe_irq_off(unsigned long val) nr_of_irqs++; } desc->status = status & ~IRQ_AUTODETECT; - desc->irq_data.chip->irq_shutdown(&desc->irq_data); + irq_shutdown(desc); } raw_spin_unlock_irq(&desc->lock); } diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 31258782742..988fe7a2428 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -192,6 +192,25 @@ void set_irq_nested_thread(unsigned int irq, int nest) } EXPORT_SYMBOL_GPL(set_irq_nested_thread); +int irq_startup(struct irq_desc *desc) +{ + desc->status &= ~(IRQ_MASKED | IRQ_DISABLED); + desc->depth = 0; + + if (desc->irq_data.chip->irq_startup) + return desc->irq_data.chip->irq_startup(&desc->irq_data); + + desc->irq_data.chip->irq_enable(&desc->irq_data); + return 0; +} + +void irq_shutdown(struct irq_desc *desc) +{ + desc->status |= IRQ_MASKED | IRQ_DISABLED; + desc->depth = 1; + desc->irq_data.chip->irq_shutdown(&desc->irq_data); +} + /* * default enable function */ @@ -210,17 +229,6 @@ static void default_disable(struct irq_data *data) { } -/* - * default startup function - */ -static unsigned int default_startup(struct irq_data *data) -{ - struct irq_desc *desc = irq_data_to_desc(data); - - desc->irq_data.chip->irq_enable(data); - return 0; -} - /* * default shutdown function */ @@ -229,7 +237,6 @@ static void default_shutdown(struct irq_data *data) struct irq_desc *desc = irq_data_to_desc(data); desc->irq_data.chip->irq_mask(&desc->irq_data); - desc->status |= IRQ_MASKED; } #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED @@ -337,8 +344,6 @@ void irq_chip_set_defaults(struct irq_chip *chip) chip->irq_enable = default_enable; if (!chip->irq_disable) chip->irq_disable = default_disable; - if (!chip->irq_startup) - chip->irq_startup = default_startup; /* * We use chip->irq_disable, when the user provided its own. When * we have default_disable set for chip->irq_disable, then we need @@ -747,10 +752,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, desc->name = name; if (handle != handle_bad_irq && is_chained) { - desc->status &= ~IRQ_DISABLED; desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE; - desc->depth = 0; - desc->irq_data.chip->irq_startup(&desc->irq_data); + irq_startup(desc); } raw_spin_unlock_irqrestore(&desc->lock, flags); chip_bus_sync_unlock(desc); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index b17c9844040..5cbfc93ed7b 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -38,6 +38,9 @@ extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); +extern int irq_startup(struct irq_desc *desc); +extern void irq_shutdown(struct irq_desc *desc); + extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); /* Resending of interrupts :*/ diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 30bc8de4090..9c562477e28 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -906,11 +906,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) if (new->flags & IRQF_ONESHOT) desc->status |= IRQ_ONESHOT; - if (!(desc->status & IRQ_NOAUTOEN)) { - desc->depth = 0; - desc->status &= ~IRQ_DISABLED; - desc->irq_data.chip->irq_startup(&desc->irq_data); - } else + if (!(desc->status & IRQ_NOAUTOEN)) + irq_startup(desc); + else /* Undo nested disables: */ desc->depth = 1; @@ -1055,10 +1053,8 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) #endif /* If this was the last handler, shut down the IRQ line: */ - if (!desc->action) { - desc->status |= IRQ_DISABLED; - desc->irq_data.chip->irq_shutdown(&desc->irq_data); - } + if (!desc->action) + irq_shutdown(desc); #ifdef CONFIG_SMP /* make sure affinity_hint is cleaned up */ -- cgit v1.2.3-70-g09d2 From 87923470c712dff00b101ffb6b6fbc27bd7a6df5 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 3 Feb 2011 12:27:44 +0100 Subject: genirq: Consolidate disable/enable Create irq_disable/enable and use them to keep the flags consistent. Signed-off-by: Thomas Gleixner --- kernel/irq/chip.c | 12 +++++++++++- kernel/irq/internals.h | 2 ++ kernel/irq/manage.c | 2 +- kernel/irq/resend.c | 10 +++++----- kernel/irq/spurious.c | 2 +- 5 files changed, 20 insertions(+), 8 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 988fe7a2428..86c8e42f7fe 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -200,7 +200,7 @@ int irq_startup(struct irq_desc *desc) if (desc->irq_data.chip->irq_startup) return desc->irq_data.chip->irq_startup(&desc->irq_data); - desc->irq_data.chip->irq_enable(&desc->irq_data); + irq_enable(desc); return 0; } @@ -211,6 +211,16 @@ void irq_shutdown(struct irq_desc *desc) desc->irq_data.chip->irq_shutdown(&desc->irq_data); } +void irq_enable(struct irq_desc *desc) +{ + desc->irq_data.chip->irq_enable(&desc->irq_data); +} + +void irq_disable(struct irq_desc *desc) +{ + desc->irq_data.chip->irq_disable(&desc->irq_data); +} + /* * default enable function */ diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 5cbfc93ed7b..c71fc4de037 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -40,6 +40,8 @@ extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume); extern int irq_startup(struct irq_desc *desc); extern void irq_shutdown(struct irq_desc *desc); +extern void irq_enable(struct irq_desc *desc); +extern void irq_disable(struct irq_desc *desc); extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 9c562477e28..00780239969 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -331,7 +331,7 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend) if (!desc->depth++) { desc->status |= IRQ_DISABLED; - desc->irq_data.chip->irq_disable(&desc->irq_data); + irq_disable(desc); } } diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index dc49358b73f..4bfe268dffe 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -55,20 +55,20 @@ static DECLARE_TASKLET(resend_tasklet, resend_irqs, 0); */ void check_irq_resend(struct irq_desc *desc, unsigned int irq) { - unsigned int status = desc->status; - /* * Make sure the interrupt is enabled, before resending it: */ - desc->irq_data.chip->irq_enable(&desc->irq_data); + irq_enable(desc); /* * We do not resend level type interrupts. Level type * interrupts are resent by hardware when they are still * active. */ - if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) { - desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY; + if (desc->status & IRQ_LEVEL) + return; + if ((desc->status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) { + desc->status = (desc->status & ~IRQ_PENDING) | IRQ_REPLAY; if (!desc->irq_data.chip->irq_retrigger || !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) { diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index f749d29bfd8..c300b8f6008 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -303,7 +303,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc, printk(KERN_EMERG "Disabling IRQ #%d\n", irq); desc->status |= IRQ_DISABLED | IRQ_SPURIOUS_DISABLED; desc->depth++; - desc->irq_data.chip->irq_disable(&desc->irq_data); + irq_disable(desc); mod_timer(&poll_spurious_irq_timer, jiffies + POLL_SPURIOUS_IRQ_INTERVAL); -- cgit v1.2.3-70-g09d2 From 4912609f228da4a3d2bfbdf0f31de3d9eab2b7f8 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 01:08:49 +0100 Subject: genirq: Implement handle_irq_event() 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 --- kernel/irq/handle.c | 47 +++++++++++++++++++++++++++++++++++++++-------- kernel/irq/internals.h | 3 +++ 2 files changed, 42 insertions(+), 8 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index cdd6fbbe771..4ef059478eb 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -51,14 +51,7 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action) "but no thread function available.", irq, action->name); } -/** - * handle_IRQ_event - irq action chain handler - * @irq: the interrupt number - * @action: the interrupt action chain for this irq - * - * Handles the action chain of an irq event - */ -irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action) +static irqreturn_t __handle_irq_event(unsigned int irq, struct irqaction *action) { irqreturn_t ret, retval = IRQ_NONE; unsigned int status = 0; @@ -120,3 +113,41 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action) return retval; } + +irqreturn_t +handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action) +{ + irqreturn_t ret = __handle_irq_event(desc->irq_data.irq, action); + + if (!noirqdebug) + note_interrupt(desc->irq_data.irq, desc, ret); + return ret; +} + +irqreturn_t handle_irq_event(struct irq_desc *desc) +{ + struct irqaction *action = desc->action; + irqreturn_t ret; + + desc->status &= ~IRQ_PENDING; + desc->status |= IRQ_INPROGRESS; + raw_spin_unlock(&desc->lock); + + ret = handle_irq_event_percpu(desc, action); + + raw_spin_lock(&desc->lock); + desc->status &= ~IRQ_INPROGRESS; + return ret; +} + +/** + * handle_IRQ_event - irq action chain handler + * @irq: the interrupt number + * @action: the interrupt action chain for this irq + * + * Handles the action chain of an irq event + */ +irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action) +{ + return __handle_irq_event(irq, action); +} diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index c71fc4de037..b61824cdadc 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -45,6 +45,9 @@ extern void irq_disable(struct irq_desc *desc); extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); +irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action); +irqreturn_t handle_irq_event(struct irq_desc *desc); + /* Resending of interrupts :*/ void check_irq_resend(struct irq_desc *desc, unsigned int irq); bool irq_wait_for_poll(struct irq_desc *desc); -- cgit v1.2.3-70-g09d2 From dbec07bac614a61e3392c1e7c08cc6a49ad43f7a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 20:19:55 +0100 Subject: genirq: Add internal state field to irq_desc 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 --- include/linux/irqdesc.h | 3 ++- kernel/irq/internals.h | 6 ++++++ 2 files changed, 8 insertions(+), 1 deletion(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index 64794dec93b..782bf9851a9 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -19,6 +19,7 @@ struct timer_rand_state; * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()] * @action: the irq action chain * @status: status information + * @core_internal_state__do_not_mess_with_it: core internal status information * @depth: disable-depth, for nested irq_disable() calls * @wake_depth: enable depth, for multiple set_irq_wake() callers * @irq_count: stats field to detect stalled irqs @@ -63,7 +64,7 @@ struct irq_desc { irq_flow_handler_t handle_irq; struct irqaction *action; /* IRQ action list */ unsigned int status; /* IRQ status */ - + unsigned int core_internal_state__do_not_mess_with_it; unsigned int depth; /* nested irq disables */ unsigned int wake_depth; /* nested wake enables */ unsigned int irq_count; /* For detecting broken IRQs */ diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index b61824cdadc..ae96e688f4e 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -1,5 +1,9 @@ /* * IRQ subsystem internal functions and variables: + * + * Do not ever include this file from anything else than + * kernel/irq/. Do not even think about using any information outside + * of this file for your non core code. */ #include @@ -9,6 +13,8 @@ # define IRQ_BITMAP_BITS NR_IRQS #endif +#define istate core_internal_state__do_not_mess_with_it + extern int noirqdebug; /* -- cgit v1.2.3-70-g09d2 From e6bea9c404699223322d7411c6f2ceaec02fa83c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 9 Feb 2011 13:16:52 +0100 Subject: genirq: Protect tglx from tripping over his own feet 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 --- kernel/irq/internals.h | 2 ++ kernel/irq/irqdesc.c | 4 ++-- kernel/irq/settings.h | 7 +++++++ 3 files changed, 11 insertions(+), 2 deletions(-) create mode 100644 kernel/irq/settings.h (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index ae96e688f4e..8f200310a95 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -13,6 +13,8 @@ # define IRQ_BITMAP_BITS NR_IRQS #endif +#include "settings.h" + #define istate core_internal_state__do_not_mess_with_it extern int noirqdebug; diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 6f6644f819d..8b87f2ce020 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -79,7 +79,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node) desc->irq_data.chip_data = NULL; desc->irq_data.handler_data = NULL; desc->irq_data.msi_desc = NULL; - desc->status = IRQ_DEFAULT_INIT_FLAGS; + desc->status = _IRQ_DEFAULT_INIT_FLAGS; desc->handle_irq = handle_bad_irq; desc->depth = 1; desc->irq_count = 0; @@ -246,7 +246,7 @@ int __init early_irq_init(void) struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = { [0 ... NR_IRQS-1] = { - .status = IRQ_DEFAULT_INIT_FLAGS, + .status = _IRQ_DEFAULT_INIT_FLAGS, .handle_irq = handle_bad_irq, .depth = 1, .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock), diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h new file mode 100644 index 00000000000..610f55597ce --- /dev/null +++ b/kernel/irq/settings.h @@ -0,0 +1,7 @@ +/* + * Internal header to deal with irq_desc->status which will be renamed + * to irq_desc->settings. + */ +enum { + _IRQ_DEFAULT_INIT_FLAGS = IRQ_DEFAULT_INIT_FLAGS, +}; -- cgit v1.2.3-70-g09d2 From bd062e7667ac173afef57fbfe9327f3b914a9d4c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 20:25:25 +0100 Subject: genirq: Move IRQ_AUTODETECT to internal state No users outside of core Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 1 - kernel/irq/autoprobe.c | 29 ++++++++++++----------------- kernel/irq/internals.h | 15 +++++++++++++-- kernel/irq/manage.c | 3 ++- 4 files changed, 27 insertions(+), 21 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index e32b64ccdc8..d1f9c352cd1 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -54,7 +54,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ #define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ #define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ -#define IRQ_AUTODETECT 0x00001000 /* IRQ is being autodetected */ #define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */ #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 08947cb6172..916e56e10a2 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -32,7 +32,6 @@ unsigned long probe_irq_on(void) { struct irq_desc *desc; unsigned long mask = 0; - unsigned int status; int i; /* @@ -76,7 +75,8 @@ unsigned long probe_irq_on(void) for_each_irq_desc_reverse(i, desc) { raw_spin_lock_irq(&desc->lock); if (!desc->action && !(desc->status & IRQ_NOPROBE)) { - desc->status |= IRQ_AUTODETECT | IRQ_WAITING; + desc->istate |= IRQS_AUTODETECT; + desc->status |= IRQ_WAITING; if (irq_startup(desc)) desc->status |= IRQ_PENDING; } @@ -93,12 +93,11 @@ unsigned long probe_irq_on(void) */ for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); - status = desc->status; - if (status & IRQ_AUTODETECT) { + if (desc->istate & IRQS_AUTODETECT) { /* It triggered already - consider it spurious. */ - if (!(status & IRQ_WAITING)) { - desc->status = status & ~IRQ_AUTODETECT; + if (!(desc->status & IRQ_WAITING)) { + desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } else if (i < 32) @@ -125,19 +124,17 @@ EXPORT_SYMBOL(probe_irq_on); */ unsigned int probe_irq_mask(unsigned long val) { - unsigned int status, mask = 0; + unsigned int mask = 0; struct irq_desc *desc; int i; for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); - status = desc->status; - - if (status & IRQ_AUTODETECT) { - if (i < 16 && !(status & IRQ_WAITING)) + if (desc->istate & IRQS_AUTODETECT) { + if (i < 16 && !(desc->status & IRQ_WAITING)) mask |= 1 << i; - desc->status = status & ~IRQ_AUTODETECT; + desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } raw_spin_unlock_irq(&desc->lock); @@ -169,19 +166,17 @@ int probe_irq_off(unsigned long val) { int i, irq_found = 0, nr_of_irqs = 0; struct irq_desc *desc; - unsigned int status; for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); - status = desc->status; - if (status & IRQ_AUTODETECT) { - if (!(status & IRQ_WAITING)) { + if (desc->istate & IRQS_AUTODETECT) { + if (!(desc->status & IRQ_WAITING)) { if (!nr_of_irqs) irq_found = i; nr_of_irqs++; } - desc->status = status & ~IRQ_AUTODETECT; + desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } raw_spin_unlock_irq(&desc->lock); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 8f200310a95..7ffd4f439b9 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -33,6 +33,15 @@ enum { IRQTF_AFFINITY, }; +/* + * Bit masks for desc->state + * + * IRQS_AUTODETECT - autodetection in progress + */ +enum { + IRQS_AUTODETECT = 0x00000001, +}; + #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) /* Set default functions for irq_chip structures: */ @@ -98,6 +107,7 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc) #include #define P(f) if (desc->status & f) printk("%14s set\n", #f) +#define PS(f) if (desc->istate & f) printk("%14s set\n", #f) static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) { @@ -117,7 +127,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_DISABLED); P(IRQ_PENDING); P(IRQ_REPLAY); - P(IRQ_AUTODETECT); P(IRQ_WAITING); P(IRQ_LEVEL); P(IRQ_MASKED); @@ -127,7 +136,9 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_NOPROBE); P(IRQ_NOREQUEST); P(IRQ_NOAUTOEN); + + PS(IRQS_AUTODETECT); } #undef P - +#undef PS diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index dd4e5c21b9e..abe852c9449 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -897,8 +897,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_PER_CPU; #endif - desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING | IRQ_ONESHOT | + desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT | IRQ_INPROGRESS | IRQ_SPURIOUS_DISABLED); + desc->istate &= ~IRQS_AUTODETECT; if (new->flags & IRQF_ONESHOT) desc->status |= IRQ_ONESHOT; -- cgit v1.2.3-70-g09d2 From 7acdd53e5b2c55b6f7e3427e85e2f91fa814a4f9 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 20:40:54 +0100 Subject: genirq: Move IRQ_SPURIOUS_DISABLED to core state No users outside. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 1 - kernel/irq/internals.h | 3 +++ kernel/irq/manage.c | 9 ++++----- kernel/irq/spurious.c | 8 ++++---- 4 files changed, 11 insertions(+), 10 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index d1f9c352cd1..a900741b43e 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -64,7 +64,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */ #define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ -#define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 7ffd4f439b9..dc5e21b84f9 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -37,9 +37,12 @@ enum { * Bit masks for desc->state * * IRQS_AUTODETECT - autodetection in progress + * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt + * detection */ enum { IRQS_AUTODETECT = 0x00000001, + IRQS_SPURIOUS_DISABLED = 0x00000002, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index abe852c9449..5b918ffa46a 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -897,9 +897,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_PER_CPU; #endif - desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT | - IRQ_INPROGRESS | IRQ_SPURIOUS_DISABLED); - desc->istate &= ~IRQS_AUTODETECT; + desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT | IRQ_INPROGRESS); + desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED); if (new->flags & IRQF_ONESHOT) desc->status |= IRQ_ONESHOT; @@ -937,8 +936,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) * Check whether we disabled the irq via the spurious handler * before. Reenable it and give it another chance. */ - if (shared && (desc->status & IRQ_SPURIOUS_DISABLED)) { - desc->status &= ~IRQ_SPURIOUS_DISABLED; + if (shared && (desc->istate & IRQS_SPURIOUS_DISABLED)) { + desc->istate &= ~IRQS_SPURIOUS_DISABLED; __enable_irq(desc, irq, false); } diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index bc0620745d5..2941d8a22df 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -146,15 +146,15 @@ static void poll_spurious_irqs(unsigned long dummy) irq_poll_cpu = smp_processor_id(); for_each_irq_desc(i, desc) { - unsigned int status; + unsigned int state; if (!i) continue; /* Racy but it doesn't matter */ - status = desc->status; + state = desc->istate; barrier(); - if (!(status & IRQ_SPURIOUS_DISABLED)) + if (!(state & IRQS_SPURIOUS_DISABLED)) continue; local_irq_disable(); @@ -298,7 +298,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc, * Now kill the IRQ */ printk(KERN_EMERG "Disabling IRQ #%d\n", irq); - desc->status |= IRQ_SPURIOUS_DISABLED; + desc->istate |= IRQS_SPURIOUS_DISABLED; desc->depth++; irq_disable(desc); -- cgit v1.2.3-70-g09d2 From 6954b75b488dd740950573f244ddd66fd28620aa Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 20:55:35 +0100 Subject: genirq: Move IRQ_POLL_INPROGRESS to core No users outside of core. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 1 - kernel/irq/chip.c | 2 +- kernel/irq/internals.h | 2 ++ kernel/irq/spurious.c | 6 +++--- 4 files changed, 6 insertions(+), 5 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 67b77cfb2a3..047a695511d 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -69,7 +69,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ #define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */ #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ -#define IRQ_POLL_INPROGRESS 0x20000000 /* IRQ poll is in progress */ #define IRQF_MODIFY_MASK \ (IRQ_TYPE_SENSE_MASK | IRQ_NOPROBE | IRQ_NOREQUEST | \ diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index bff21f233a0..34245e7d121 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -400,7 +400,7 @@ EXPORT_SYMBOL_GPL(handle_nested_irq); static bool irq_check_poll(struct irq_desc *desc) { - if (!(desc->status & IRQ_POLL_INPROGRESS)) + if (!(desc->istate & IRQS_POLL_INPROGRESS)) return false; return irq_wait_for_poll(desc); } diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index dc5e21b84f9..f5d28e1e1ed 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -39,10 +39,12 @@ enum { * IRQS_AUTODETECT - autodetection in progress * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt * detection + * IRQS_POLL_INPROGRESS - polling in progress */ enum { IRQS_AUTODETECT = 0x00000001, IRQS_SPURIOUS_DISABLED = 0x00000002, + IRQS_POLL_INPROGRESS = 0x00000008, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 2941d8a22df..21c46178b1a 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -98,13 +98,13 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) } /* Mark it poll in progress */ - desc->status |= IRQ_POLL_INPROGRESS; + desc->istate |= IRQS_POLL_INPROGRESS; do { if (handle_irq_event(desc) == IRQ_HANDLED) ret = IRQ_HANDLED; action = desc->action; } while ((desc->status & IRQ_PENDING) && action); - desc->status &= ~IRQ_POLL_INPROGRESS; + desc->istate &= ~IRQS_POLL_INPROGRESS; out: raw_spin_unlock(&desc->lock); return ret == IRQ_HANDLED; @@ -259,7 +259,7 @@ try_misrouted_irq(unsigned int irq, struct irq_desc *desc, void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret) { - if (desc->status & IRQ_POLL_INPROGRESS) + if (desc->istate & IRQS_POLL_INPROGRESS) return; if (unlikely(action_ret != IRQ_HANDLED)) { -- cgit v1.2.3-70-g09d2 From 009b4c3b8ad584b3462734127a5bec680d5d6af4 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 21:48:49 +0100 Subject: genirq: Add IRQ_INPROGRESS to core 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 --- include/linux/irq.h | 6 +++++- kernel/irq/Kconfig | 3 +++ kernel/irq/chip.c | 16 +++++++++------- kernel/irq/compat.h | 17 +++++++++++++++++ kernel/irq/handle.c | 6 ++++-- kernel/irq/internals.h | 5 ++++- kernel/irq/manage.c | 17 +++++++++-------- kernel/irq/settings.h | 3 +++ kernel/irq/spurious.c | 6 +++--- 9 files changed, 57 insertions(+), 22 deletions(-) create mode 100644 kernel/irq/compat.h (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 047a695511d..274590fc55a 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -50,7 +50,11 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_TYPE_PROBE 0x00000010 /* Probing in progress */ /* Internal flags */ -#define IRQ_INPROGRESS 0x00000100 /* IRQ handler active - do not enter! */ + +#ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT +#define IRQ_INPROGRESS 0x00000100 /* DEPRECATED */ +#endif + #define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ #define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ #define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 4cd5d7135e0..9e2256de1d1 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -13,6 +13,9 @@ config GENERIC_HARDIRQS config GENERIC_HARDIRQS_NO_DEPRECATED def_bool n +config GENERIC_HARDIRQS_NO_COMPAT + def_bool n + # Options selectable by the architecture code config HAVE_SPARSE_IRQ def_bool n diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 34245e7d121..075385549dc 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -383,7 +383,8 @@ void handle_nested_irq(unsigned int irq) if (unlikely(!action || (desc->status & IRQ_DISABLED))) goto out_unlock; - desc->status |= IRQ_INPROGRESS; + irq_compat_set_progress(desc); + desc->istate |= IRQS_INPROGRESS; raw_spin_unlock_irq(&desc->lock); action_ret = action->thread_fn(action->irq, action->dev_id); @@ -391,7 +392,8 @@ void handle_nested_irq(unsigned int irq) note_interrupt(irq, desc, action_ret); raw_spin_lock_irq(&desc->lock); - desc->status &= ~IRQ_INPROGRESS; + desc->istate &= ~IRQS_INPROGRESS; + irq_compat_clr_progress(desc); out_unlock: raw_spin_unlock_irq(&desc->lock); @@ -422,7 +424,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc) { raw_spin_lock(&desc->lock); - if (unlikely(desc->status & IRQ_INPROGRESS)) + if (unlikely(desc->istate & IRQS_INPROGRESS)) if (!irq_check_poll(desc)) goto out_unlock; @@ -454,7 +456,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc) raw_spin_lock(&desc->lock); mask_ack_irq(desc); - if (unlikely(desc->status & IRQ_INPROGRESS)) + if (unlikely(desc->istate & IRQS_INPROGRESS)) if (!irq_check_poll(desc)) goto out_unlock; @@ -492,7 +494,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) { raw_spin_lock(&desc->lock); - if (unlikely(desc->status & IRQ_INPROGRESS)) + if (unlikely(desc->istate & IRQS_INPROGRESS)) if (!irq_check_poll(desc)) goto out; @@ -542,8 +544,8 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) * we shouldn't process the IRQ. Mark it pending, handle * the necessary masking and go out */ - if (unlikely((desc->status & (IRQ_INPROGRESS | IRQ_DISABLED)) || - !desc->action)) { + if (unlikely((desc->istate & (IRQS_INPROGRESS) || + (desc->status & IRQ_DISABLED) || !desc->action))) { if (!irq_check_poll(desc)) { desc->status |= IRQ_PENDING; mask_ack_irq(desc); diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h new file mode 100644 index 00000000000..aac6e400e60 --- /dev/null +++ b/kernel/irq/compat.h @@ -0,0 +1,17 @@ +/* + * Compat layer for transition period + */ +#ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT +static inline void irq_compat_set_progress(struct irq_desc *desc) +{ + desc->status |= IRQ_INPROGRESS; +} + +static inline void irq_compat_clr_progress(struct irq_desc *desc) +{ + desc->status &= ~IRQ_INPROGRESS; +} +#else +static inline void irq_compat_set_progress(struct irq_desc *desc) { } +static inline void irq_compat_clr_progress(struct irq_desc *desc) { } +#endif diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index ff40e0f5e2e..d4ae0b1ccc0 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -123,13 +123,15 @@ irqreturn_t handle_irq_event(struct irq_desc *desc) irqreturn_t ret; desc->status &= ~IRQ_PENDING; - desc->status |= IRQ_INPROGRESS; + irq_compat_set_progress(desc); + desc->istate |= IRQS_INPROGRESS; raw_spin_unlock(&desc->lock); ret = handle_irq_event_percpu(desc, action); raw_spin_lock(&desc->lock); - desc->status &= ~IRQ_INPROGRESS; + desc->istate &= ~IRQS_INPROGRESS; + irq_compat_clr_progress(desc); return ret; } diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index f5d28e1e1ed..d1cb1f8df6f 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -13,6 +13,7 @@ # define IRQ_BITMAP_BITS NR_IRQS #endif +#include "compat.h" #include "settings.h" #define istate core_internal_state__do_not_mess_with_it @@ -40,11 +41,13 @@ enum { * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt * detection * IRQS_POLL_INPROGRESS - polling in progress + * IRQS_INPROGRESS - Interrupt in progress */ enum { IRQS_AUTODETECT = 0x00000001, IRQS_SPURIOUS_DISABLED = 0x00000002, IRQS_POLL_INPROGRESS = 0x00000008, + IRQS_INPROGRESS = 0x00000010, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) @@ -128,7 +131,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) print_symbol("%s\n", (unsigned long)desc->action->handler); } - P(IRQ_INPROGRESS); P(IRQ_DISABLED); P(IRQ_PENDING); P(IRQ_REPLAY); @@ -143,6 +145,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_NOAUTOEN); PS(IRQS_AUTODETECT); + PS(IRQS_INPROGRESS); } #undef P diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 5b918ffa46a..7e5a5082508 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -30,7 +30,7 @@ void synchronize_irq(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); - unsigned int status; + unsigned int state; if (!desc) return; @@ -42,16 +42,16 @@ void synchronize_irq(unsigned int irq) * Wait until we're out of the critical section. This might * give the wrong answer due to the lack of memory barriers. */ - while (desc->status & IRQ_INPROGRESS) + while (desc->istate & IRQS_INPROGRESS) cpu_relax(); /* Ok, that indicated we're done: double-check carefully. */ raw_spin_lock_irqsave(&desc->lock, flags); - status = desc->status; + state = desc->istate; raw_spin_unlock_irqrestore(&desc->lock, flags); /* Oops, that failed? */ - } while (status & IRQ_INPROGRESS); + } while (state & IRQS_INPROGRESS); /* * We made sure that no hardirq handler is running. Now verify @@ -637,9 +637,9 @@ again: * The thread is faster done than the hard interrupt handler * on the other CPU. If we unmask the irq line then the * interrupt can come in again and masks the line, leaves due - * to IRQ_INPROGRESS and the irq line is masked forever. + * to IRQS_INPROGRESS and the irq line is masked forever. */ - if (unlikely(desc->status & IRQ_INPROGRESS)) { + if (unlikely(desc->istate & IRQS_INPROGRESS)) { raw_spin_unlock_irq(&desc->lock); chip_bus_sync_unlock(desc); cpu_relax(); @@ -897,8 +897,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_PER_CPU; #endif - desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT | IRQ_INPROGRESS); - desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED); + desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT); + desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \ + IRQS_INPROGRESS); if (new->flags & IRQF_ONESHOT) desc->status |= IRQ_ONESHOT; diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 610f55597ce..a96140eea40 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -5,3 +5,6 @@ enum { _IRQ_DEFAULT_INIT_FLAGS = IRQ_DEFAULT_INIT_FLAGS, }; + +#undef IRQ_INPROGRESS +#define IRQ_INPROGRESS GOT_YOU_MORON diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 21c46178b1a..51504837d8c 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -45,10 +45,10 @@ bool irq_wait_for_poll(struct irq_desc *desc) #ifdef CONFIG_SMP do { raw_spin_unlock(&desc->lock); - while (desc->status & IRQ_INPROGRESS) + while (desc->istate & IRQS_INPROGRESS) cpu_relax(); raw_spin_lock(&desc->lock); - } while (desc->status & IRQ_INPROGRESS); + } while (desc->istate & IRQS_INPROGRESS); /* Might have been disabled in meantime */ return !(desc->status & IRQ_DISABLED) && desc->action; #else @@ -88,7 +88,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) goto out; /* Already running on another processor */ - if (desc->status & IRQ_INPROGRESS) { + if (desc->istate & IRQS_INPROGRESS) { /* * Already running: If it is shared get the other * CPU to go looking for our mystery interrupt too -- cgit v1.2.3-70-g09d2 From 3d67baec7f1b01fc289ac1a2f1a7e6d5e43391c6 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 21:02:10 +0100 Subject: genirq: Move IRQ_ONESHOT to core No users outside of core. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 1 - kernel/irq/chip.c | 2 +- kernel/irq/internals.h | 2 ++ kernel/irq/manage.c | 8 ++++---- 4 files changed, 7 insertions(+), 6 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 274590fc55a..1a4c723e74e 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -71,7 +71,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ #define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ -#define IRQ_ONESHOT 0x08000000 /* IRQ is not unmasked after hardirq */ #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ #define IRQF_MODIFY_MASK \ diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 075385549dc..420fa6bdb11 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -472,7 +472,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc) handle_irq_event(desc); - if (!(desc->status & (IRQ_DISABLED | IRQ_ONESHOT))) + if (!(desc->status & IRQ_DISABLED) && !(desc->istate & IRQS_ONESHOT)) unmask_irq(desc); out_unlock: raw_spin_unlock(&desc->lock); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index d1cb1f8df6f..36563f731ff 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -42,12 +42,14 @@ enum { * detection * IRQS_POLL_INPROGRESS - polling in progress * IRQS_INPROGRESS - Interrupt in progress + * IRQS_ONESHOT - irq is not unmasked in primary handler */ enum { IRQS_AUTODETECT = 0x00000001, IRQS_SPURIOUS_DISABLED = 0x00000002, IRQS_POLL_INPROGRESS = 0x00000008, IRQS_INPROGRESS = 0x00000010, + IRQS_ONESHOT = 0x00000020, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 7e5a5082508..aca4208a03a 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -697,7 +697,7 @@ static int irq_thread(void *data) }; struct irqaction *action = data; struct irq_desc *desc = irq_to_desc(action->irq); - int wake, oneshot = desc->status & IRQ_ONESHOT; + int wake, oneshot = desc->istate & IRQS_ONESHOT; sched_setscheduler(current, SCHED_FIFO, ¶m); current->irqaction = action; @@ -897,12 +897,12 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_PER_CPU; #endif - desc->status &= ~(IRQ_WAITING | IRQ_ONESHOT); + desc->status &= ~IRQ_WAITING; desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \ - IRQS_INPROGRESS); + IRQS_INPROGRESS | IRQS_ONESHOT); if (new->flags & IRQF_ONESHOT) - desc->status |= IRQ_ONESHOT; + desc->istate |= IRQS_ONESHOT; if (!(desc->status & IRQ_NOAUTOEN)) irq_startup(desc); -- cgit v1.2.3-70-g09d2 From 163ef3091195f514a06f064b12914597d2644c55 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 11:39:15 +0100 Subject: genirq: Move IRQ_REPLAY and IRQ_WAITING to core No users outside of core. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 9 +++++---- kernel/irq/autoprobe.c | 11 +++++------ kernel/irq/chip.c | 9 ++++----- kernel/irq/internals.h | 8 ++++++-- kernel/irq/manage.c | 4 ++-- kernel/irq/resend.c | 7 +++++-- kernel/irq/settings.h | 4 ++++ 7 files changed, 31 insertions(+), 21 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 1a4c723e74e..c38dbd50665 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -53,12 +53,13 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT #define IRQ_INPROGRESS 0x00000100 /* DEPRECATED */ +#define IRQ_REPLAY 0x00000200 /* DEPRECATED */ +#define IRQ_WAITING 0x00000400 /* DEPRECATED */ #endif -#define IRQ_DISABLED 0x00000200 /* IRQ disabled - do not enter! */ -#define IRQ_PENDING 0x00000400 /* IRQ pending - replay on enable */ -#define IRQ_REPLAY 0x00000800 /* IRQ has been replayed but not acked yet */ -#define IRQ_WAITING 0x00002000 /* IRQ not yet seen - for autodetection */ +#define IRQ_DISABLED 0x00000800 /* IRQ disabled - do not enter! */ +#define IRQ_PENDING 0x00001000 /* IRQ pending - replay on enable */ + #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 916e56e10a2..9ea8bb99f7c 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -17,7 +17,7 @@ /* * Autodetection depends on the fact that any interrupt that * comes in on to an unassigned handler will get stuck with - * "IRQ_WAITING" cleared and the interrupt disabled. + * "IRQS_WAITING" cleared and the interrupt disabled. */ static DEFINE_MUTEX(probing_active); @@ -75,8 +75,7 @@ unsigned long probe_irq_on(void) for_each_irq_desc_reverse(i, desc) { raw_spin_lock_irq(&desc->lock); if (!desc->action && !(desc->status & IRQ_NOPROBE)) { - desc->istate |= IRQS_AUTODETECT; - desc->status |= IRQ_WAITING; + desc->istate |= IRQS_AUTODETECT | IRQS_WAITING; if (irq_startup(desc)) desc->status |= IRQ_PENDING; } @@ -96,7 +95,7 @@ unsigned long probe_irq_on(void) if (desc->istate & IRQS_AUTODETECT) { /* It triggered already - consider it spurious. */ - if (!(desc->status & IRQ_WAITING)) { + if (!(desc->istate & IRQS_WAITING)) { desc->istate &= ~IRQS_AUTODETECT; irq_shutdown(desc); } else @@ -131,7 +130,7 @@ unsigned int probe_irq_mask(unsigned long val) for_each_irq_desc(i, desc) { raw_spin_lock_irq(&desc->lock); if (desc->istate & IRQS_AUTODETECT) { - if (i < 16 && !(desc->status & IRQ_WAITING)) + if (i < 16 && !(desc->istate & IRQS_WAITING)) mask |= 1 << i; desc->istate &= ~IRQS_AUTODETECT; @@ -171,7 +170,7 @@ int probe_irq_off(unsigned long val) raw_spin_lock_irq(&desc->lock); if (desc->istate & IRQS_AUTODETECT) { - if (!(desc->status & IRQ_WAITING)) { + if (!(desc->istate & IRQS_WAITING)) { if (!nr_of_irqs) irq_found = i; nr_of_irqs++; diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 420fa6bdb11..59ae14527ec 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -428,7 +428,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc) if (!irq_check_poll(desc)) goto out_unlock; - desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); + desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); kstat_incr_irqs_this_cpu(irq, desc); if (unlikely(!desc->action || (desc->status & IRQ_DISABLED))) @@ -460,7 +460,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc) if (!irq_check_poll(desc)) goto out_unlock; - desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); + desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); kstat_incr_irqs_this_cpu(irq, desc); /* @@ -498,7 +498,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) if (!irq_check_poll(desc)) goto out; - desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); + desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); kstat_incr_irqs_this_cpu(irq, desc); /* @@ -537,8 +537,7 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) { raw_spin_lock(&desc->lock); - desc->status &= ~(IRQ_REPLAY | IRQ_WAITING); - + desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); /* * If we're currently running this IRQ, or its disabled, * we shouldn't process the IRQ. Mark it pending, handle diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 36563f731ff..54037533af7 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -43,6 +43,8 @@ enum { * IRQS_POLL_INPROGRESS - polling in progress * IRQS_INPROGRESS - Interrupt in progress * IRQS_ONESHOT - irq is not unmasked in primary handler + * IRQS_REPLAY - irq is replayed + * IRQS_WAITING - irq is waiting */ enum { IRQS_AUTODETECT = 0x00000001, @@ -50,6 +52,8 @@ enum { IRQS_POLL_INPROGRESS = 0x00000008, IRQS_INPROGRESS = 0x00000010, IRQS_ONESHOT = 0x00000020, + IRQS_REPLAY = 0x00000040, + IRQS_WAITING = 0x00000080, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) @@ -135,8 +139,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_DISABLED); P(IRQ_PENDING); - P(IRQ_REPLAY); - P(IRQ_WAITING); P(IRQ_LEVEL); P(IRQ_MASKED); #ifdef CONFIG_IRQ_PER_CPU @@ -148,6 +150,8 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) PS(IRQS_AUTODETECT); PS(IRQS_INPROGRESS); + PS(IRQS_REPLAY); + PS(IRQS_WAITING); } #undef P diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index aca4208a03a..7971df53d6a 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -897,9 +897,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->status |= IRQ_PER_CPU; #endif - desc->status &= ~IRQ_WAITING; desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \ - IRQS_INPROGRESS | IRQS_ONESHOT); + IRQS_INPROGRESS | IRQS_ONESHOT | \ + IRQS_WAITING); if (new->flags & IRQF_ONESHOT) desc->istate |= IRQS_ONESHOT; diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 60b20261041..f83387cd11f 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -62,8 +62,11 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq) */ if (desc->status & IRQ_LEVEL) return; - if ((desc->status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) { - desc->status = (desc->status & ~IRQ_PENDING) | IRQ_REPLAY; + if (desc->istate & IRQS_REPLAY) + return; + if (desc->status & IRQ_PENDING) { + desc->status &= ~IRQ_PENDING; + desc->istate |= IRQS_REPLAY; if (!desc->irq_data.chip->irq_retrigger || !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) { diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index a96140eea40..2e7d08fff0c 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -8,3 +8,7 @@ enum { #undef IRQ_INPROGRESS #define IRQ_INPROGRESS GOT_YOU_MORON +#undef IRQ_REPLAY +#define IRQ_REPLAY GOT_YOU_MORON +#undef IRQ_WAITING +#define IRQ_WAITING GOT_YOU_MORON -- cgit v1.2.3-70-g09d2 From c1594b77e46124bb462f961e536120e471c67446 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 7 Feb 2011 22:11:30 +0100 Subject: genirq: Move IRQ_DISABLED to core Keep status in sync until all abusers are fixed. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 4 ++-- kernel/irq/chip.c | 48 +++++++++++++++++++++++++++++++----------------- kernel/irq/compat.h | 12 ++++++++++++ kernel/irq/internals.h | 4 +++- kernel/irq/irqdesc.c | 2 ++ kernel/irq/manage.c | 4 ++-- kernel/irq/migration.c | 2 +- kernel/irq/settings.h | 2 ++ kernel/irq/spurious.c | 4 ++-- 9 files changed, 57 insertions(+), 25 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index c38dbd50665..32efca71ce8 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -55,9 +55,9 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_INPROGRESS 0x00000100 /* DEPRECATED */ #define IRQ_REPLAY 0x00000200 /* DEPRECATED */ #define IRQ_WAITING 0x00000400 /* DEPRECATED */ +#define IRQ_DISABLED 0x00000800 /* DEPRECATED */ #endif -#define IRQ_DISABLED 0x00000800 /* IRQ disabled - do not enter! */ #define IRQ_PENDING 0x00001000 /* IRQ pending - replay on enable */ #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ @@ -231,7 +231,7 @@ struct irq_chip { # define ARCH_IRQ_INIT_FLAGS 0 #endif -#define IRQ_DEFAULT_INIT_FLAGS (IRQ_DISABLED | ARCH_IRQ_INIT_FLAGS) +#define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS struct irqaction; extern int setup_irq(unsigned int irq, struct irqaction *new); diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 59ae14527ec..527df7ab1b0 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -164,9 +164,21 @@ struct irq_data *irq_get_irq_data(unsigned int irq) } EXPORT_SYMBOL_GPL(irq_get_irq_data); +static void irq_state_clr_disabled(struct irq_desc *desc) +{ + desc->istate &= ~IRQS_DISABLED; + irq_compat_clr_disabled(desc); +} + +static void irq_state_set_disabled(struct irq_desc *desc) +{ + desc->istate |= IRQS_DISABLED; + irq_compat_set_disabled(desc); +} + int irq_startup(struct irq_desc *desc) { - desc->status &= ~IRQ_DISABLED; + irq_state_clr_disabled(desc); desc->depth = 0; if (desc->irq_data.chip->irq_startup) { @@ -181,7 +193,7 @@ int irq_startup(struct irq_desc *desc) void irq_shutdown(struct irq_desc *desc) { - desc->status |= IRQ_DISABLED; + irq_state_set_disabled(desc); desc->depth = 1; if (desc->irq_data.chip->irq_shutdown) desc->irq_data.chip->irq_shutdown(&desc->irq_data); @@ -194,7 +206,7 @@ void irq_shutdown(struct irq_desc *desc) void irq_enable(struct irq_desc *desc) { - desc->status &= ~IRQ_DISABLED; + irq_state_clr_disabled(desc); if (desc->irq_data.chip->irq_enable) desc->irq_data.chip->irq_enable(&desc->irq_data); else @@ -204,7 +216,7 @@ void irq_enable(struct irq_desc *desc) void irq_disable(struct irq_desc *desc) { - desc->status |= IRQ_DISABLED; + irq_state_set_disabled(desc); if (desc->irq_data.chip->irq_disable) { desc->irq_data.chip->irq_disable(&desc->irq_data); desc->status |= IRQ_MASKED; @@ -380,7 +392,7 @@ void handle_nested_irq(unsigned int irq) kstat_incr_irqs_this_cpu(irq, desc); action = desc->action; - if (unlikely(!action || (desc->status & IRQ_DISABLED))) + if (unlikely(!action || (desc->istate & IRQS_DISABLED))) goto out_unlock; irq_compat_set_progress(desc); @@ -431,7 +443,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc) desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); kstat_incr_irqs_this_cpu(irq, desc); - if (unlikely(!desc->action || (desc->status & IRQ_DISABLED))) + if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) goto out_unlock; handle_irq_event(desc); @@ -467,12 +479,12 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc) * If its disabled or no action available * keep it masked and get out of here */ - if (unlikely(!desc->action || (desc->status & IRQ_DISABLED))) + if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) goto out_unlock; handle_irq_event(desc); - if (!(desc->status & IRQ_DISABLED) && !(desc->istate & IRQS_ONESHOT)) + if (!(desc->istate & (IRQS_DISABLED | IRQS_ONESHOT))) unmask_irq(desc); out_unlock: raw_spin_unlock(&desc->lock); @@ -505,7 +517,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) * If its disabled or no action available * then mask it and get out of here: */ - if (unlikely(!desc->action || (desc->status & IRQ_DISABLED))) { + if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) { desc->status |= IRQ_PENDING; mask_irq(desc); goto out; @@ -543,8 +555,8 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) * we shouldn't process the IRQ. Mark it pending, handle * the necessary masking and go out */ - if (unlikely((desc->istate & (IRQS_INPROGRESS) || - (desc->status & IRQ_DISABLED) || !desc->action))) { + if (unlikely((desc->istate & (IRQS_DISABLED | IRQS_INPROGRESS) || + !desc->action))) { if (!irq_check_poll(desc)) { desc->status |= IRQ_PENDING; mask_ack_irq(desc); @@ -567,15 +579,16 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) * one, we could have masked the irq. * Renable it, if it was not disabled in meantime. */ - if (unlikely((desc->status & - (IRQ_PENDING | IRQ_MASKED | IRQ_DISABLED)) == - (IRQ_PENDING | IRQ_MASKED))) { - unmask_irq(desc); + if (unlikely(desc->status & IRQ_PENDING)) { + if (!(desc->istate & IRQS_DISABLED) && + (desc->status & IRQ_MASKED)) + unmask_irq(desc); } handle_irq_event(desc); - } while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING); + } while ((desc->status & IRQ_PENDING) && + !(desc->istate & IRQS_DISABLED)); out_unlock: raw_spin_unlock(&desc->lock); @@ -639,7 +652,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, if (handle == handle_bad_irq) { if (desc->irq_data.chip != &no_irq_chip) mask_ack_irq(desc); - desc->status |= IRQ_DISABLED; + irq_compat_set_disabled(desc); + desc->istate |= IRQS_DISABLED; desc->depth = 1; } desc->handle_irq = handle; diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h index aac6e400e60..bc0c2a501e8 100644 --- a/kernel/irq/compat.h +++ b/kernel/irq/compat.h @@ -11,7 +11,19 @@ static inline void irq_compat_clr_progress(struct irq_desc *desc) { desc->status &= ~IRQ_INPROGRESS; } +static inline void irq_compat_set_disabled(struct irq_desc *desc) +{ + desc->status |= IRQ_DISABLED; +} + +static inline void irq_compat_clr_disabled(struct irq_desc *desc) +{ + desc->status &= ~IRQ_DISABLED; +} #else static inline void irq_compat_set_progress(struct irq_desc *desc) { } static inline void irq_compat_clr_progress(struct irq_desc *desc) { } +static inline void irq_compat_set_disabled(struct irq_desc *desc) { } +static inline void irq_compat_clr_disabled(struct irq_desc *desc) { } #endif + diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 54037533af7..919d2dd0bb3 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -45,6 +45,7 @@ enum { * IRQS_ONESHOT - irq is not unmasked in primary handler * IRQS_REPLAY - irq is replayed * IRQS_WAITING - irq is waiting + * IRQS_DISABLED - irq is disabled */ enum { IRQS_AUTODETECT = 0x00000001, @@ -54,6 +55,7 @@ enum { IRQS_ONESHOT = 0x00000020, IRQS_REPLAY = 0x00000040, IRQS_WAITING = 0x00000080, + IRQS_DISABLED = 0x00000100, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) @@ -137,7 +139,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) print_symbol("%s\n", (unsigned long)desc->action->handler); } - P(IRQ_DISABLED); P(IRQ_PENDING); P(IRQ_LEVEL); P(IRQ_MASKED); @@ -152,6 +153,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) PS(IRQS_INPROGRESS); PS(IRQS_REPLAY); PS(IRQS_WAITING); + PS(IRQS_DISABLED); } #undef P diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 8b87f2ce020..78866d050bc 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -80,6 +80,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node) desc->irq_data.handler_data = NULL; desc->irq_data.msi_desc = NULL; desc->status = _IRQ_DEFAULT_INIT_FLAGS; + desc->istate = IRQS_DISABLED; desc->handle_irq = handle_bad_irq; desc->depth = 1; desc->irq_count = 0; @@ -247,6 +248,7 @@ int __init early_irq_init(void) struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = { [0 ... NR_IRQS-1] = { .status = _IRQ_DEFAULT_INIT_FLAGS, + .istate = IRQS_DISABLED, .handle_irq = handle_bad_irq, .depth = 1, .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock), diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 7971df53d6a..77ff275b54c 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -646,7 +646,7 @@ again: goto again; } - if (!(desc->status & IRQ_DISABLED) && (desc->status & IRQ_MASKED)) { + if (!(desc->istate & IRQS_DISABLED) && (desc->status & IRQ_MASKED)) { desc->status &= ~IRQ_MASKED; desc->irq_data.chip->irq_unmask(&desc->irq_data); } @@ -709,7 +709,7 @@ static int irq_thread(void *data) atomic_inc(&desc->threads_active); raw_spin_lock_irq(&desc->lock); - if (unlikely(desc->status & IRQ_DISABLED)) { + if (unlikely(desc->istate & IRQS_DISABLED)) { /* * CHECKME: We might need a dedicated * IRQ_THREAD_PENDING flag here, which diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index 441fd629ff0..8c68cb8555a 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -61,7 +61,7 @@ void move_native_irq(int irq) if (likely(!(desc->status & IRQ_MOVE_PENDING))) return; - if (unlikely(desc->status & IRQ_DISABLED)) + if (unlikely(desc->istate & IRQS_DISABLED)) return; /* diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 2e7d08fff0c..5e3411c7c62 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -12,3 +12,5 @@ enum { #define IRQ_REPLAY GOT_YOU_MORON #undef IRQ_WAITING #define IRQ_WAITING GOT_YOU_MORON +#undef IRQ_DISABLED +#define IRQ_DISABLED GOT_YOU_MORON diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 51504837d8c..367614f858f 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -50,7 +50,7 @@ bool irq_wait_for_poll(struct irq_desc *desc) raw_spin_lock(&desc->lock); } while (desc->istate & IRQS_INPROGRESS); /* Might have been disabled in meantime */ - return !(desc->status & IRQ_DISABLED) && desc->action; + return !(desc->istate & IRQS_DISABLED) && desc->action; #else return false; #endif @@ -75,7 +75,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) * Do not poll disabled interrupts unless the spurious * disabled poller asks explicitely. */ - if ((desc->status & IRQ_DISABLED) && !force) + if ((desc->istate & IRQS_DISABLED) && !force) goto out; /* -- cgit v1.2.3-70-g09d2 From 2a0d6fb335d4428285dab2d254911748e6040807 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 12:17:57 +0100 Subject: genirq: Move IRQ_PENDING flag to core Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 2 +- kernel/irq/autoprobe.c | 6 ++++-- kernel/irq/chip.c | 10 ++++++---- kernel/irq/compat.h | 12 +++++++++++- kernel/irq/handle.c | 3 ++- kernel/irq/internals.h | 4 +++- kernel/irq/manage.c | 5 +++-- kernel/irq/pm.c | 3 ++- kernel/irq/resend.c | 5 +++-- kernel/irq/settings.h | 2 ++ kernel/irq/spurious.c | 5 +++-- 11 files changed, 40 insertions(+), 17 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 32efca71ce8..7ca55c9deba 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -56,9 +56,9 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_REPLAY 0x00000200 /* DEPRECATED */ #define IRQ_WAITING 0x00000400 /* DEPRECATED */ #define IRQ_DISABLED 0x00000800 /* DEPRECATED */ +#define IRQ_PENDING 0x00001000 /* DEPRECATED */ #endif -#define IRQ_PENDING 0x00001000 /* IRQ pending - replay on enable */ #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 9ea8bb99f7c..aab64c26272 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -76,8 +76,10 @@ unsigned long probe_irq_on(void) raw_spin_lock_irq(&desc->lock); if (!desc->action && !(desc->status & IRQ_NOPROBE)) { desc->istate |= IRQS_AUTODETECT | IRQS_WAITING; - if (irq_startup(desc)) - desc->status |= IRQ_PENDING; + if (irq_startup(desc)) { + irq_compat_set_pending(desc); + desc->istate |= IRQS_PENDING; + } } raw_spin_unlock_irq(&desc->lock); } diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 527df7ab1b0..17c87865bfb 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -518,7 +518,8 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) * then mask it and get out of here: */ if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) { - desc->status |= IRQ_PENDING; + irq_compat_set_pending(desc); + desc->istate |= IRQS_PENDING; mask_irq(desc); goto out; } @@ -558,7 +559,8 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) if (unlikely((desc->istate & (IRQS_DISABLED | IRQS_INPROGRESS) || !desc->action))) { if (!irq_check_poll(desc)) { - desc->status |= IRQ_PENDING; + irq_compat_set_pending(desc); + desc->istate |= IRQS_PENDING; mask_ack_irq(desc); goto out_unlock; } @@ -579,7 +581,7 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) * one, we could have masked the irq. * Renable it, if it was not disabled in meantime. */ - if (unlikely(desc->status & IRQ_PENDING)) { + if (unlikely(desc->istate & IRQS_PENDING)) { if (!(desc->istate & IRQS_DISABLED) && (desc->status & IRQ_MASKED)) unmask_irq(desc); @@ -587,7 +589,7 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) handle_irq_event(desc); - } while ((desc->status & IRQ_PENDING) && + } while ((desc->istate & IRQS_PENDING) && !(desc->istate & IRQS_DISABLED)); out_unlock: diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h index bc0c2a501e8..0067a69781f 100644 --- a/kernel/irq/compat.h +++ b/kernel/irq/compat.h @@ -15,15 +15,25 @@ static inline void irq_compat_set_disabled(struct irq_desc *desc) { desc->status |= IRQ_DISABLED; } - static inline void irq_compat_clr_disabled(struct irq_desc *desc) { desc->status &= ~IRQ_DISABLED; } +static inline void irq_compat_set_pending(struct irq_desc *desc) +{ + desc->status |= IRQ_PENDING; +} + +static inline void irq_compat_clr_pending(struct irq_desc *desc) +{ + desc->status &= ~IRQ_PENDING; +} #else static inline void irq_compat_set_progress(struct irq_desc *desc) { } static inline void irq_compat_clr_progress(struct irq_desc *desc) { } static inline void irq_compat_set_disabled(struct irq_desc *desc) { } static inline void irq_compat_clr_disabled(struct irq_desc *desc) { } +static inline void irq_compat_set_pending(struct irq_desc *desc) { } +static inline void irq_compat_clr_pending(struct irq_desc *desc) { } #endif diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index d4ae0b1ccc0..6e34bdbeb26 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -122,7 +122,8 @@ irqreturn_t handle_irq_event(struct irq_desc *desc) struct irqaction *action = desc->action; irqreturn_t ret; - desc->status &= ~IRQ_PENDING; + irq_compat_clr_pending(desc); + desc->istate &= ~IRQS_PENDING; irq_compat_set_progress(desc); desc->istate |= IRQS_INPROGRESS; raw_spin_unlock(&desc->lock); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 919d2dd0bb3..fdf2524437e 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -46,6 +46,7 @@ enum { * IRQS_REPLAY - irq is replayed * IRQS_WAITING - irq is waiting * IRQS_DISABLED - irq is disabled + * IRQS_PENDING - irq is pending and replayed later */ enum { IRQS_AUTODETECT = 0x00000001, @@ -56,6 +57,7 @@ enum { IRQS_REPLAY = 0x00000040, IRQS_WAITING = 0x00000080, IRQS_DISABLED = 0x00000100, + IRQS_PENDING = 0x00000200, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) @@ -139,7 +141,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) print_symbol("%s\n", (unsigned long)desc->action->handler); } - P(IRQ_PENDING); P(IRQ_LEVEL); P(IRQ_MASKED); #ifdef CONFIG_IRQ_PER_CPU @@ -154,6 +155,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) PS(IRQS_REPLAY); PS(IRQS_WAITING); PS(IRQS_DISABLED); + PS(IRQS_PENDING); } #undef P diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 77ff275b54c..ac060814a78 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -714,10 +714,11 @@ static int irq_thread(void *data) * CHECKME: We might need a dedicated * IRQ_THREAD_PENDING flag here, which * retriggers the thread in check_irq_resend() - * but AFAICT IRQ_PENDING should be fine as it + * but AFAICT IRQS_PENDING should be fine as it * retriggers the interrupt itself --- tglx */ - desc->status |= IRQ_PENDING; + irq_compat_set_pending(desc); + desc->istate |= IRQS_PENDING; raw_spin_unlock_irq(&desc->lock); } else { raw_spin_unlock_irq(&desc->lock); diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index d6bfb89cce9..d7389418e91 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -69,7 +69,8 @@ int check_wakeup_irqs(void) int irq; for_each_irq_desc(irq, desc) - if ((desc->status & IRQ_WAKEUP) && (desc->status & IRQ_PENDING)) + if ((desc->status & IRQ_WAKEUP) && + (desc->istate & IRQS_PENDING)) return -EBUSY; return 0; diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index f83387cd11f..ff1fea06001 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -64,8 +64,9 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq) return; if (desc->istate & IRQS_REPLAY) return; - if (desc->status & IRQ_PENDING) { - desc->status &= ~IRQ_PENDING; + if (desc->istate & IRQS_PENDING) { + irq_compat_clr_pending(desc); + desc->istate &= ~IRQS_PENDING; desc->istate |= IRQS_REPLAY; if (!desc->irq_data.chip->irq_retrigger || diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 5e3411c7c62..623fcf83e7d 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -14,3 +14,5 @@ enum { #define IRQ_WAITING GOT_YOU_MORON #undef IRQ_DISABLED #define IRQ_DISABLED GOT_YOU_MORON +#undef IRQ_PENDING +#define IRQ_PENDING GOT_YOU_MORON diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 367614f858f..692ce2bae30 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -93,7 +93,8 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) * Already running: If it is shared get the other * CPU to go looking for our mystery interrupt too */ - desc->status |= IRQ_PENDING; + irq_compat_set_pending(desc); + desc->istate |= IRQS_PENDING; goto out; } @@ -103,7 +104,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) if (handle_irq_event(desc) == IRQ_HANDLED) ret = IRQ_HANDLED; action = desc->action; - } while ((desc->status & IRQ_PENDING) && action); + } while ((desc->istate & IRQS_PENDING) && action); desc->istate &= ~IRQS_POLL_INPROGRESS; out: raw_spin_unlock(&desc->lock); -- cgit v1.2.3-70-g09d2 From 6e40262ea43c4b0e3f435b3a083e4461ef921c17 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 12:36:06 +0100 Subject: genirq: Move IRQ_MASKED to core Keep status in sync until all users are fixed. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 2 +- kernel/irq/chip.c | 28 ++++++++++++++++++++-------- kernel/irq/compat.h | 11 +++++++++++ kernel/irq/internals.h | 4 +++- kernel/irq/manage.c | 5 +++-- kernel/irq/migration.c | 2 +- kernel/irq/settings.h | 2 ++ 7 files changed, 41 insertions(+), 13 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 7ca55c9deba..9800bac4c39 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -57,11 +57,11 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_WAITING 0x00000400 /* DEPRECATED */ #define IRQ_DISABLED 0x00000800 /* DEPRECATED */ #define IRQ_PENDING 0x00001000 /* DEPRECATED */ +#define IRQ_MASKED 0x00002000 /* DEPRECATED */ #endif #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ -#define IRQ_MASKED 0x00008000 /* IRQ masked - shouldn't be seen again */ #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ #define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */ #define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */ diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 17c87865bfb..73b2e7e0093 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -176,6 +176,18 @@ static void irq_state_set_disabled(struct irq_desc *desc) irq_compat_set_disabled(desc); } +static void irq_state_clr_masked(struct irq_desc *desc) +{ + desc->istate &= ~IRQS_MASKED; + irq_compat_clr_masked(desc); +} + +static void irq_state_set_masked(struct irq_desc *desc) +{ + desc->istate |= IRQS_MASKED; + irq_compat_set_masked(desc); +} + int irq_startup(struct irq_desc *desc) { irq_state_clr_disabled(desc); @@ -183,7 +195,7 @@ int irq_startup(struct irq_desc *desc) if (desc->irq_data.chip->irq_startup) { int ret = desc->irq_data.chip->irq_startup(&desc->irq_data); - desc->status &= ~IRQ_MASKED; + irq_state_clr_masked(desc); return ret; } @@ -201,7 +213,7 @@ void irq_shutdown(struct irq_desc *desc) desc->irq_data.chip->irq_disable(&desc->irq_data); else desc->irq_data.chip->irq_mask(&desc->irq_data); - desc->status |= IRQ_MASKED; + irq_state_set_masked(desc); } void irq_enable(struct irq_desc *desc) @@ -211,7 +223,7 @@ void irq_enable(struct irq_desc *desc) desc->irq_data.chip->irq_enable(&desc->irq_data); else desc->irq_data.chip->irq_unmask(&desc->irq_data); - desc->status &= ~IRQ_MASKED; + irq_state_clr_masked(desc); } void irq_disable(struct irq_desc *desc) @@ -219,8 +231,8 @@ void irq_disable(struct irq_desc *desc) irq_state_set_disabled(desc); if (desc->irq_data.chip->irq_disable) { desc->irq_data.chip->irq_disable(&desc->irq_data); - desc->status |= IRQ_MASKED; } + irq_state_set_masked(desc); } #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED @@ -352,14 +364,14 @@ static inline void mask_ack_irq(struct irq_desc *desc) if (desc->irq_data.chip->irq_ack) desc->irq_data.chip->irq_ack(&desc->irq_data); } - desc->status |= IRQ_MASKED; + irq_state_set_masked(desc); } static inline void mask_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_mask) { desc->irq_data.chip->irq_mask(&desc->irq_data); - desc->status |= IRQ_MASKED; + irq_state_set_masked(desc); } } @@ -367,7 +379,7 @@ static inline void unmask_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_unmask) { desc->irq_data.chip->irq_unmask(&desc->irq_data); - desc->status &= ~IRQ_MASKED; + irq_state_clr_masked(desc); } } @@ -583,7 +595,7 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) */ if (unlikely(desc->istate & IRQS_PENDING)) { if (!(desc->istate & IRQS_DISABLED) && - (desc->status & IRQ_MASKED)) + (desc->istate & IRQS_MASKED)) unmask_irq(desc); } diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h index 0067a69781f..593abecbcc4 100644 --- a/kernel/irq/compat.h +++ b/kernel/irq/compat.h @@ -28,6 +28,15 @@ static inline void irq_compat_clr_pending(struct irq_desc *desc) { desc->status &= ~IRQ_PENDING; } +static inline void irq_compat_set_masked(struct irq_desc *desc) +{ + desc->status |= IRQ_MASKED; +} + +static inline void irq_compat_clr_masked(struct irq_desc *desc) +{ + desc->status &= ~IRQ_MASKED; +} #else static inline void irq_compat_set_progress(struct irq_desc *desc) { } static inline void irq_compat_clr_progress(struct irq_desc *desc) { } @@ -35,5 +44,7 @@ static inline void irq_compat_set_disabled(struct irq_desc *desc) { } static inline void irq_compat_clr_disabled(struct irq_desc *desc) { } static inline void irq_compat_set_pending(struct irq_desc *desc) { } static inline void irq_compat_clr_pending(struct irq_desc *desc) { } +static inline void irq_compat_set_masked(struct irq_desc *desc) { } +static inline void irq_compat_clr_masked(struct irq_desc *desc) { } #endif diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index fdf2524437e..3f2fcc194dc 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -47,6 +47,7 @@ enum { * IRQS_WAITING - irq is waiting * IRQS_DISABLED - irq is disabled * IRQS_PENDING - irq is pending and replayed later + * IRQS_MASKED - irq is masked */ enum { IRQS_AUTODETECT = 0x00000001, @@ -58,6 +59,7 @@ enum { IRQS_WAITING = 0x00000080, IRQS_DISABLED = 0x00000100, IRQS_PENDING = 0x00000200, + IRQS_MASKED = 0x00000400, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) @@ -142,7 +144,6 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) } P(IRQ_LEVEL); - P(IRQ_MASKED); #ifdef CONFIG_IRQ_PER_CPU P(IRQ_PER_CPU); #endif @@ -156,6 +157,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) PS(IRQS_WAITING); PS(IRQS_DISABLED); PS(IRQS_PENDING); + PS(IRQS_MASKED); } #undef P diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index ac060814a78..83fd20194e5 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -646,8 +646,9 @@ again: goto again; } - if (!(desc->istate & IRQS_DISABLED) && (desc->status & IRQ_MASKED)) { - desc->status &= ~IRQ_MASKED; + if (!(desc->istate & IRQS_DISABLED) && (desc->istate & IRQS_MASKED)) { + irq_compat_clr_masked(desc); + desc->istate &= ~IRQS_MASKED; desc->irq_data.chip->irq_unmask(&desc->irq_data); } raw_spin_unlock_irq(&desc->lock); diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index 8c68cb8555a..6f2f9848035 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -69,7 +69,7 @@ void move_native_irq(int irq) * threaded interrupt with ONESHOT set, we can end up with an * interrupt storm. */ - masked = desc->status & IRQ_MASKED; + masked = desc->istate & IRQS_MASKED; if (!masked) desc->irq_data.chip->irq_mask(&desc->irq_data); move_masked_irq(irq); diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 623fcf83e7d..2cd45fd5ec8 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -16,3 +16,5 @@ enum { #define IRQ_DISABLED GOT_YOU_MORON #undef IRQ_PENDING #define IRQ_PENDING GOT_YOU_MORON +#undef IRQ_MASKED +#define IRQ_MASKED GOT_YOU_MORON -- cgit v1.2.3-70-g09d2 From c531e8361f1968d664e6e97fbd3bfa4cf0e62e42 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 12:44:58 +0100 Subject: genirq: Move IRQ_SUSPENDED to core No users outside of core. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 2 -- kernel/irq/internals.h | 2 ++ kernel/irq/manage.c | 8 ++++---- kernel/irq/pm.c | 6 +++--- 4 files changed, 9 insertions(+), 9 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 9800bac4c39..3ce45c257ed 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -60,7 +60,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_MASKED 0x00002000 /* DEPRECATED */ #endif - #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ #define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */ @@ -71,7 +70,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ -#define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */ #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ #define IRQF_MODIFY_MASK \ diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 3f2fcc194dc..46889119e6a 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -48,6 +48,7 @@ enum { * IRQS_DISABLED - irq is disabled * IRQS_PENDING - irq is pending and replayed later * IRQS_MASKED - irq is masked + * IRQS_SUSPENDED - irq is suspended */ enum { IRQS_AUTODETECT = 0x00000001, @@ -60,6 +61,7 @@ enum { IRQS_DISABLED = 0x00000100, IRQS_PENDING = 0x00000200, IRQS_MASKED = 0x00000400, + IRQS_SUSPENDED = 0x00000800, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 83fd20194e5..b912de4ff4d 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -326,7 +326,7 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend) if (suspend) { if (!desc->action || (desc->action->flags & IRQF_NO_SUSPEND)) return; - desc->status |= IRQ_SUSPENDED; + desc->istate |= IRQS_SUSPENDED; } if (!desc->depth++) @@ -388,7 +388,7 @@ EXPORT_SYMBOL(disable_irq); void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume) { if (resume) { - if (!(desc->status & IRQ_SUSPENDED)) { + if (!(desc->istate & IRQS_SUSPENDED)) { if (!desc->action) return; if (!(desc->action->flags & IRQF_FORCE_RESUME)) @@ -396,7 +396,7 @@ void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume) /* Pretend that it got disabled ! */ desc->depth++; } - desc->status &= ~IRQ_SUSPENDED; + desc->istate &= ~IRQS_SUSPENDED; } switch (desc->depth) { @@ -405,7 +405,7 @@ void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume) WARN(1, KERN_WARNING "Unbalanced enable for IRQ %d\n", irq); break; case 1: { - if (desc->status & IRQ_SUSPENDED) + if (desc->istate & IRQS_SUSPENDED) goto err_out; /* Prevent probing on this irq: */ desc->status |= IRQ_NOPROBE; diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index d7389418e91..d81337fc1cf 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -18,7 +18,7 @@ * During system-wide suspend or hibernation device drivers need to be prevented * from receiving interrupts and this function is provided for this purpose. * It marks all interrupt lines in use, except for the timer ones, as disabled - * and sets the IRQ_SUSPENDED flag for each of them. + * and sets the IRQS_SUSPENDED flag for each of them. */ void suspend_device_irqs(void) { @@ -34,7 +34,7 @@ void suspend_device_irqs(void) } for_each_irq_desc(irq, desc) - if (desc->status & IRQ_SUSPENDED) + if (desc->istate & IRQS_SUSPENDED) synchronize_irq(irq); } EXPORT_SYMBOL_GPL(suspend_device_irqs); @@ -43,7 +43,7 @@ EXPORT_SYMBOL_GPL(suspend_device_irqs); * resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs() * * Enable all interrupt lines previously disabled by suspend_device_irqs() that - * have the IRQ_SUSPENDED flag set. + * have the IRQS_SUSPENDED flag set. */ void resume_device_irqs(void) { -- cgit v1.2.3-70-g09d2 From 6d2cd17fde1fc3e93302815f049f255bb2b3123e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 14:34:18 +0100 Subject: genirq: Move IRQ_WAKEUP to core No users outside of core. Signed-off-by: Thomas Gleixner --- kernel/irq/internals.h | 2 ++ kernel/irq/manage.c | 4 ++-- kernel/irq/pm.c | 2 +- kernel/irq/settings.h | 2 ++ 4 files changed, 7 insertions(+), 3 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 46889119e6a..cef0849dcfa 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -49,6 +49,7 @@ enum { * IRQS_PENDING - irq is pending and replayed later * IRQS_MASKED - irq is masked * IRQS_SUSPENDED - irq is suspended + * IRQS_WAKEUP - irq triggers system wakeup from suspend */ enum { IRQS_AUTODETECT = 0x00000001, @@ -62,6 +63,7 @@ enum { IRQS_PENDING = 0x00000200, IRQS_MASKED = 0x00000400, IRQS_SUSPENDED = 0x00000800, + IRQS_WAKEUP = 0x00001000, }; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index b912de4ff4d..ccc9389909f 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -489,7 +489,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on) if (ret) desc->wake_depth = 0; else - desc->status |= IRQ_WAKEUP; + desc->istate |= IRQS_WAKEUP; } } else { if (desc->wake_depth == 0) { @@ -499,7 +499,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on) if (ret) desc->wake_depth = 1; else - desc->status &= ~IRQ_WAKEUP; + desc->istate &= ~IRQS_WAKEUP; } } diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index d81337fc1cf..f39383d8672 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -69,7 +69,7 @@ int check_wakeup_irqs(void) int irq; for_each_irq_desc(irq, desc) - if ((desc->status & IRQ_WAKEUP) && + if ((desc->istate & IRQS_WAKEUP) && (desc->istate & IRQS_PENDING)) return -EBUSY; diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 2cd45fd5ec8..ef09824e4b3 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -18,3 +18,5 @@ enum { #define IRQ_PENDING GOT_YOU_MORON #undef IRQ_MASKED #define IRQ_MASKED GOT_YOU_MORON +#undef IRQ_WAKEUP +#define IRQ_WAKEUP GOT_YOU_MORON -- cgit v1.2.3-70-g09d2 From f230b6d5c48f8d12f4dfa1f8b5ab0b0320076d21 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sat, 5 Feb 2011 15:20:04 +0100 Subject: genirq: Add IRQ_MOVE_PENDING to irq_data.state 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 --- include/linux/irq.h | 20 ++++++++++++++++++-- kernel/irq/compat.h | 11 +++++++++++ kernel/irq/internals.h | 15 +++++++++++++++ kernel/irq/manage.c | 4 ++-- kernel/irq/migration.c | 6 +++--- kernel/irq/proc.c | 2 +- kernel/irq/settings.h | 2 ++ 7 files changed, 52 insertions(+), 8 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 62bb08e4af1..2899905bfac 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -58,15 +58,16 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_DISABLED 0x00000800 /* DEPRECATED */ #define IRQ_PENDING 0x00001000 /* DEPRECATED */ #define IRQ_MASKED 0x00002000 /* DEPRECATED */ +/* DEPRECATED use irq_setaffinity_pending() instead*/ +#define IRQ_MOVE_PENDING 0x00004000 #endif -#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ +#define IRQ_LEVEL 0x00008000 /* IRQ level triggered */ #define IRQ_PER_CPU 0x00010000 /* IRQ is per CPU */ #define IRQ_NOPROBE 0x00020000 /* IRQ is not valid for probing */ #define IRQ_NOREQUEST 0x00040000 /* IRQ cannot be requested */ #define IRQ_NOAUTOEN 0x00080000 /* IRQ will not be enabled on request irq */ #define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */ -#define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ #define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ @@ -128,6 +129,21 @@ struct irq_data { #endif }; +/* + * Bit masks for irq_data.state + * + * IRQD_SETAFFINITY_PENDING - Affinity setting is pending + */ +enum { + /* Bit 0 - 7 reserved for TYPE will use later */ + IRQD_SETAFFINITY_PENDING = (1 << 8), +}; + +static inline bool irqd_is_setaffinity_pending(struct irq_data *d) +{ + return d->state_use_accessors & IRQD_SETAFFINITY_PENDING; +} + /** * struct irq_chip - hardware interrupt chip descriptor * diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h index 593abecbcc4..5e33aadadac 100644 --- a/kernel/irq/compat.h +++ b/kernel/irq/compat.h @@ -37,6 +37,15 @@ static inline void irq_compat_clr_masked(struct irq_desc *desc) { desc->status &= ~IRQ_MASKED; } +static inline void irq_compat_set_move_pending(struct irq_desc *desc) +{ + desc->status |= IRQ_MOVE_PENDING; +} + +static inline void irq_compat_clr_move_pending(struct irq_desc *desc) +{ + desc->status &= ~IRQ_MOVE_PENDING; +} #else static inline void irq_compat_set_progress(struct irq_desc *desc) { } static inline void irq_compat_clr_progress(struct irq_desc *desc) { } @@ -46,5 +55,7 @@ static inline void irq_compat_set_pending(struct irq_desc *desc) { } static inline void irq_compat_clr_pending(struct irq_desc *desc) { } static inline void irq_compat_set_masked(struct irq_desc *desc) { } static inline void irq_compat_clr_masked(struct irq_desc *desc) { } +static inline void irq_compat_set_move_pending(struct irq_desc *desc) { } +static inline void irq_compat_clr_move_pending(struct irq_desc *desc) { } #endif diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index cef0849dcfa..e93e6090cd4 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -124,6 +124,21 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc) desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); } +/* + * Manipulation functions for irq_data.state + */ +static inline void irqd_set_move_pending(struct irq_data *d) +{ + d->state_use_accessors |= IRQD_SETAFFINITY_PENDING; + irq_compat_set_move_pending(irq_data_to_desc(d)); +} + +static inline void irqd_clr_move_pending(struct irq_data *d) +{ + d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; + irq_compat_clr_move_pending(irq_data_to_desc(d)); +} + /* * Debugging printout: */ diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index ccc9389909f..9a99c471d47 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -107,7 +107,7 @@ static inline bool irq_can_move_pcntxt(struct irq_desc *desc) } static inline bool irq_move_pending(struct irq_desc *desc) { - return desc->status & IRQ_MOVE_PENDING; + return irqd_is_setaffinity_pending(&desc->irq_data); } static inline void irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask) @@ -156,7 +156,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask) ret = 0; } } else { - desc->status |= IRQ_MOVE_PENDING; + irqd_set_move_pending(&desc->irq_data); irq_copy_pending(desc, mask); } diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index 6f2f9848035..9485ae081dc 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -9,7 +9,7 @@ void move_masked_irq(int irq) struct irq_desc *desc = irq_to_desc(irq); struct irq_chip *chip = desc->irq_data.chip; - if (likely(!(desc->status & IRQ_MOVE_PENDING))) + if (likely(!irqd_is_setaffinity_pending(&desc->irq_data))) return; /* @@ -20,7 +20,7 @@ void move_masked_irq(int irq) return; } - desc->status &= ~IRQ_MOVE_PENDING; + irqd_clr_move_pending(&desc->irq_data); if (unlikely(cpumask_empty(desc->pending_mask))) return; @@ -58,7 +58,7 @@ void move_native_irq(int irq) struct irq_desc *desc = irq_to_desc(irq); bool masked; - if (likely(!(desc->status & IRQ_MOVE_PENDING))) + if (likely(!irqd_is_setaffinity_pending(&desc->irq_data))) return; if (unlikely(desc->istate & IRQS_DISABLED)) diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index 26449239bb4..afe4e680314 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -25,7 +25,7 @@ static int irq_affinity_proc_show(struct seq_file *m, void *v) const struct cpumask *mask = desc->irq_data.affinity; #ifdef CONFIG_GENERIC_PENDING_IRQ - if (desc->status & IRQ_MOVE_PENDING) + if (irqd_is_setaffinity_pending(&desc->irq_data)) mask = desc->pending_mask; #endif seq_cpumask(m, mask); diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index ef09824e4b3..bb104a2dce7 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -20,3 +20,5 @@ enum { #define IRQ_MASKED GOT_YOU_MORON #undef IRQ_WAKEUP #define IRQ_WAKEUP GOT_YOU_MORON +#undef IRQ_MOVE_PENDING +#define IRQ_MOVE_PENDING GOT_YOU_MORON -- cgit v1.2.3-70-g09d2 From 6a58fb3bad099076f36f0f30f44507bc3275cdb6 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 15:40:05 +0100 Subject: genirq: Remove CONFIG_IRQ_PER_CPU 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 --- include/linux/irq.h | 5 ----- kernel/irq/Kconfig | 3 --- kernel/irq/internals.h | 2 -- kernel/irq/manage.c | 9 +++------ 4 files changed, 3 insertions(+), 16 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 2899905bfac..ab708f27a33 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -78,13 +78,8 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \ IRQ_PER_CPU | IRQ_NESTED_THREAD) -#ifdef CONFIG_IRQ_PER_CPU # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) # define IRQ_NO_BALANCING_MASK (IRQ_PER_CPU | IRQ_NO_BALANCING) -#else -# define CHECK_IRQ_PER_CPU(var) 0 -# define IRQ_NO_BALANCING_MASK IRQ_NO_BALANCING -#endif /* * Return value for chip->irq_set_affinity() diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 9e2256de1d1..48ad25f5fa5 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -32,9 +32,6 @@ config GENERIC_PENDING_IRQ config AUTO_IRQ_AFFINITY def_bool n -config IRQ_PER_CPU - def_bool n - config HARDIRQS_SW_RESEND def_bool n diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index e93e6090cd4..9e32b3d35d3 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -163,9 +163,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) } P(IRQ_LEVEL); -#ifdef CONFIG_IRQ_PER_CPU P(IRQ_PER_CPU); -#endif P(IRQ_NOPROBE); P(IRQ_NOREQUEST); P(IRQ_NOAUTOEN); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 9a99c471d47..056aa49698b 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -865,12 +865,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) goto mismatch; } -#if defined(CONFIG_IRQ_PER_CPU) /* All handlers must agree on per-cpuness */ if ((old->flags & IRQF_PERCPU) != (new->flags & IRQF_PERCPU)) goto mismatch; -#endif /* add new interrupt at end of irq queue */ do { @@ -894,15 +892,14 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) goto out_mask; } else compat_irq_chip_set_default_handler(desc); -#if defined(CONFIG_IRQ_PER_CPU) - if (new->flags & IRQF_PERCPU) - desc->status |= IRQ_PER_CPU; -#endif desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \ IRQS_INPROGRESS | IRQS_ONESHOT | \ IRQS_WAITING); + if (new->flags & IRQF_PERCPU) + desc->status |= IRQ_PER_CPU; + if (new->flags & IRQF_ONESHOT) desc->istate |= IRQS_ONESHOT; -- cgit v1.2.3-70-g09d2 From 1ce6068dac1924f7095be5850481e790cbf1b3c1 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 9 Feb 2011 20:44:21 +0100 Subject: genirq: Move debug code to separate header It'll break when I'm going to undefine the constants. Signed-off-by: Thomas Gleixner --- kernel/irq/debug.h | 40 ++++++++++++++++++++++++++++++++++++++++ kernel/irq/internals.h | 48 ++++-------------------------------------------- 2 files changed, 44 insertions(+), 44 deletions(-) create mode 100644 kernel/irq/debug.h (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/debug.h b/kernel/irq/debug.h new file mode 100644 index 00000000000..d1a33b7fa61 --- /dev/null +++ b/kernel/irq/debug.h @@ -0,0 +1,40 @@ +/* + * Debugging printout: + */ + +#include + +#define P(f) if (desc->status & f) printk("%14s set\n", #f) +#define PS(f) if (desc->istate & f) printk("%14s set\n", #f) + +static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) +{ + printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n", + irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled); + printk("->handle_irq(): %p, ", desc->handle_irq); + print_symbol("%s\n", (unsigned long)desc->handle_irq); + printk("->irq_data.chip(): %p, ", desc->irq_data.chip); + print_symbol("%s\n", (unsigned long)desc->irq_data.chip); + printk("->action(): %p\n", desc->action); + if (desc->action) { + printk("->action->handler(): %p, ", desc->action->handler); + print_symbol("%s\n", (unsigned long)desc->action->handler); + } + + P(IRQ_LEVEL); + P(IRQ_PER_CPU); + P(IRQ_NOPROBE); + P(IRQ_NOREQUEST); + P(IRQ_NOAUTOEN); + + PS(IRQS_AUTODETECT); + PS(IRQS_INPROGRESS); + PS(IRQS_REPLAY); + PS(IRQS_WAITING); + PS(IRQS_DISABLED); + PS(IRQS_PENDING); + PS(IRQS_MASKED); +} + +#undef P +#undef PS diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 9e32b3d35d3..b2ba59e73f2 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -13,9 +13,6 @@ # define IRQ_BITMAP_BITS NR_IRQS #endif -#include "compat.h" -#include "settings.h" - #define istate core_internal_state__do_not_mess_with_it extern int noirqdebug; @@ -66,6 +63,10 @@ enum { IRQS_WAKEUP = 0x00001000, }; +#include "compat.h" +#include "debug.h" +#include "settings.h" + #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) /* Set default functions for irq_chip structures: */ @@ -138,44 +139,3 @@ static inline void irqd_clr_move_pending(struct irq_data *d) d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; irq_compat_clr_move_pending(irq_data_to_desc(d)); } - -/* - * Debugging printout: - */ - -#include - -#define P(f) if (desc->status & f) printk("%14s set\n", #f) -#define PS(f) if (desc->istate & f) printk("%14s set\n", #f) - -static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) -{ - printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n", - irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled); - printk("->handle_irq(): %p, ", desc->handle_irq); - print_symbol("%s\n", (unsigned long)desc->handle_irq); - printk("->irq_data.chip(): %p, ", desc->irq_data.chip); - print_symbol("%s\n", (unsigned long)desc->irq_data.chip); - printk("->action(): %p\n", desc->action); - if (desc->action) { - printk("->action->handler(): %p, ", desc->action->handler); - print_symbol("%s\n", (unsigned long)desc->action->handler); - } - - P(IRQ_LEVEL); - P(IRQ_PER_CPU); - P(IRQ_NOPROBE); - P(IRQ_NOREQUEST); - P(IRQ_NOAUTOEN); - - PS(IRQS_AUTODETECT); - PS(IRQS_INPROGRESS); - PS(IRQS_REPLAY); - PS(IRQS_WAITING); - PS(IRQS_DISABLED); - PS(IRQS_PENDING); - PS(IRQS_MASKED); -} - -#undef P -#undef PS -- cgit v1.2.3-70-g09d2 From a005677b3dd05decdd8880cf3044ae709856f58f Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 17:11:03 +0100 Subject: genirq: Mirror IRQ_PER_CPU and IRQ_NO_BALANCING in irq_data.state 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 --- include/linux/irq.h | 16 +++++++++++++++- kernel/irq/chip.c | 15 +++++++++------ kernel/irq/internals.h | 11 +++++++++++ kernel/irq/manage.c | 16 ++++++++++------ kernel/irq/migration.c | 2 +- kernel/irq/settings.h | 36 ++++++++++++++++++++++++++++++++++++ kernel/irq/spurious.c | 3 ++- 7 files changed, 84 insertions(+), 15 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index 3f607ad9422..d5312e6fe1a 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -132,10 +132,14 @@ struct irq_data { * Bit masks for irq_data.state * * IRQD_SETAFFINITY_PENDING - Affinity setting is pending + * IRQD_NO_BALANCING - Balancing disabled for this IRQ + * IRQD_PER_CPU - Interrupt is per cpu */ enum { /* Bit 0 - 7 reserved for TYPE will use later */ - IRQD_SETAFFINITY_PENDING = (1 << 8), + IRQD_SETAFFINITY_PENDING = (1 << 8), + IRQD_NO_BALANCING = (1 << 10), + IRQD_PER_CPU = (1 << 11), }; static inline bool irqd_is_setaffinity_pending(struct irq_data *d) @@ -143,6 +147,16 @@ static inline bool irqd_is_setaffinity_pending(struct irq_data *d) return d->state_use_accessors & IRQD_SETAFFINITY_PENDING; } +static inline bool irqd_is_per_cpu(struct irq_data *d) +{ + return d->state_use_accessors & IRQD_PER_CPU; +} + +static inline bool irqd_can_balance(struct irq_data *d) +{ + return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING)); +} + /** * struct irq_chip - hardware interrupt chip descriptor * diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 73b2e7e0093..b8aa3dfe830 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -706,12 +706,15 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set) if (!desc) return; - /* Sanitize flags */ - set &= IRQF_MODIFY_MASK; - clr &= IRQF_MODIFY_MASK; - raw_spin_lock_irqsave(&desc->lock, flags); - desc->status &= ~clr; - desc->status |= set; + + irq_settings_clr_and_set(desc, clr, set); + + irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU); + if (irq_settings_has_no_balance_set(desc)) + irqd_set(&desc->irq_data, IRQD_NO_BALANCING); + if (irq_settings_is_per_cpu(desc)) + irqd_set(&desc->irq_data, IRQD_PER_CPU); + raw_spin_unlock_irqrestore(&desc->lock, flags); } diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index b2ba59e73f2..a80b44d2735 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -139,3 +139,14 @@ static inline void irqd_clr_move_pending(struct irq_data *d) d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING; irq_compat_clr_move_pending(irq_data_to_desc(d)); } + +static inline void irqd_clear(struct irq_data *d, unsigned int mask) +{ + d->state_use_accessors &= ~mask; +} + +static inline void irqd_set(struct irq_data *d, unsigned int mask) +{ + d->state_use_accessors |= mask; +} + diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index f1cfa271ba7..84a0a9c2222 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -73,8 +73,8 @@ int irq_can_set_affinity(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); - if ((desc->status & (IRQ_PER_CPU | IRQ_NO_BALANCING)) || - !desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity) + if (!irqd_can_balance(&desc->irq_data) || !desc->irq_data.chip || + !desc->irq_data.chip->irq_set_affinity) return 0; return 1; @@ -897,8 +897,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) IRQS_INPROGRESS | IRQS_ONESHOT | \ IRQS_WAITING); - if (new->flags & IRQF_PERCPU) - desc->status |= IRQ_PER_CPU; + if (new->flags & IRQF_PERCPU) { + irqd_set(&desc->irq_data, IRQD_PER_CPU); + irq_settings_set_per_cpu(desc); + } if (new->flags & IRQF_ONESHOT) desc->istate |= IRQS_ONESHOT; @@ -910,8 +912,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) desc->depth = 1; /* Exclude IRQ from balancing if requested */ - if (new->flags & IRQF_NOBALANCING) - desc->status |= IRQ_NO_BALANCING; + if (new->flags & IRQF_NOBALANCING) { + irq_settings_set_no_balancing(desc); + irqd_set(&desc->irq_data, IRQD_NO_BALANCING); + } /* Set default affinity mask once everything is setup */ setup_affinity(irq, desc, mask); diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index 24f53caddf4..7a93c6b88b2 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -15,7 +15,7 @@ void move_masked_irq(int irq) /* * Paranoia: cpu-local interrupts shouldn't be calling in here anyway. */ - if (desc->status & (IRQ_PER_CPU | IRQ_NO_BALANCING)) { + if (!irqd_can_balance(&desc->irq_data)) { WARN_ON(1); return; } diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index bb104a2dce7..ba0fffe410a 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -4,6 +4,9 @@ */ enum { _IRQ_DEFAULT_INIT_FLAGS = IRQ_DEFAULT_INIT_FLAGS, + _IRQ_PER_CPU = IRQ_PER_CPU, + _IRQ_NO_BALANCING = IRQ_NO_BALANCING, + _IRQF_MODIFY_MASK = IRQF_MODIFY_MASK, }; #undef IRQ_INPROGRESS @@ -22,3 +25,36 @@ enum { #define IRQ_WAKEUP GOT_YOU_MORON #undef IRQ_MOVE_PENDING #define IRQ_MOVE_PENDING GOT_YOU_MORON +#undef IRQ_PER_CPU +#define IRQ_PER_CPU GOT_YOU_MORON +#undef IRQ_NO_BALANCING +#define IRQ_NO_BALANCING GOT_YOU_MORON +#undef IRQF_MODIFY_MASK +#define IRQF_MODIFY_MASK GOT_YOU_MORON + +static inline void +irq_settings_clr_and_set(struct irq_desc *desc, u32 clr, u32 set) +{ + desc->status &= ~(clr & _IRQF_MODIFY_MASK); + desc->status |= (set & _IRQF_MODIFY_MASK); +} + +static inline bool irq_settings_is_per_cpu(struct irq_desc *desc) +{ + return desc->status & _IRQ_PER_CPU; +} + +static inline void irq_settings_set_per_cpu(struct irq_desc *desc) +{ + desc->status |= _IRQ_PER_CPU; +} + +static inline void irq_settings_set_no_balancing(struct irq_desc *desc) +{ + desc->status |= _IRQ_NO_BALANCING; +} + +static inline bool irq_settings_has_no_balance_set(struct irq_desc *desc) +{ + return desc->status & _IRQ_NO_BALANCING; +} diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 692ce2bae30..226ed7d26a8 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -68,7 +68,8 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force) raw_spin_lock(&desc->lock); /* PER_CPU and nested thread interrupts are never polled */ - if (desc->status & (IRQ_PER_CPU | IRQ_NESTED_THREAD)) + if (irq_settings_is_per_cpu(desc) || + (desc->status & IRQ_NESTED_THREAD)) goto out; /* -- cgit v1.2.3-70-g09d2 From 2bdd10558c8d93009cb6c32ce9e30800fbb08add Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 8 Feb 2011 17:22:00 +0100 Subject: genirq: Move IRQ_AFFINITY_SET to core Keep status in sync until last abuser is gone. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 9 ++++++++- kernel/irq/compat.h | 11 +++++++++++ kernel/irq/internals.h | 4 ++++ kernel/irq/manage.c | 11 +++++++---- kernel/irq/settings.h | 2 ++ 5 files changed, 32 insertions(+), 5 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index d5312e6fe1a..8da1782ecfc 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -60,6 +60,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_MASKED 0x00002000 /* DEPRECATED */ /* DEPRECATED use irq_setaffinity_pending() instead*/ #define IRQ_MOVE_PENDING 0x00004000 +#define IRQ_AFFINITY_SET 0x02000000 /* DEPRECATED */ #endif #define IRQ_LEVEL 0x00008000 /* IRQ level triggered */ @@ -70,7 +71,6 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */ #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ #define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ -#define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ #define IRQ_NESTED_THREAD 0x10000000 /* IRQ is nested into another, no own handler thread */ #define IRQF_MODIFY_MASK \ @@ -134,12 +134,14 @@ struct irq_data { * IRQD_SETAFFINITY_PENDING - Affinity setting is pending * IRQD_NO_BALANCING - Balancing disabled for this IRQ * IRQD_PER_CPU - Interrupt is per cpu + * IRQD_AFFINITY_SET - Interrupt affinity was set */ enum { /* Bit 0 - 7 reserved for TYPE will use later */ IRQD_SETAFFINITY_PENDING = (1 << 8), IRQD_NO_BALANCING = (1 << 10), IRQD_PER_CPU = (1 << 11), + IRQD_AFFINITY_SET = (1 << 12), }; static inline bool irqd_is_setaffinity_pending(struct irq_data *d) @@ -157,6 +159,11 @@ static inline bool irqd_can_balance(struct irq_data *d) return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING)); } +static inline bool irqd_affinity_was_set(struct irq_data *d) +{ + return d->state_use_accessors & IRQD_AFFINITY_SET; +} + /** * struct irq_chip - hardware interrupt chip descriptor * diff --git a/kernel/irq/compat.h b/kernel/irq/compat.h index 5e33aadadac..6bbaf66aca8 100644 --- a/kernel/irq/compat.h +++ b/kernel/irq/compat.h @@ -46,6 +46,15 @@ static inline void irq_compat_clr_move_pending(struct irq_desc *desc) { desc->status &= ~IRQ_MOVE_PENDING; } +static inline void irq_compat_set_affinity(struct irq_desc *desc) +{ + desc->status |= IRQ_AFFINITY_SET; +} + +static inline void irq_compat_clr_affinity(struct irq_desc *desc) +{ + desc->status &= ~IRQ_AFFINITY_SET; +} #else static inline void irq_compat_set_progress(struct irq_desc *desc) { } static inline void irq_compat_clr_progress(struct irq_desc *desc) { } @@ -57,5 +66,7 @@ static inline void irq_compat_set_masked(struct irq_desc *desc) { } static inline void irq_compat_clr_masked(struct irq_desc *desc) { } static inline void irq_compat_set_move_pending(struct irq_desc *desc) { } static inline void irq_compat_clr_move_pending(struct irq_desc *desc) { } +static inline void irq_compat_set_affinity(struct irq_desc *desc) { } +static inline void irq_compat_clr_affinity(struct irq_desc *desc) { } #endif diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index a80b44d2735..6776453c454 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -150,3 +150,7 @@ static inline void irqd_set(struct irq_data *d, unsigned int mask) d->state_use_accessors |= mask; } +static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) +{ + return d->state_use_accessors & mask; +} diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 550ae97a004..8246afc8195 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -164,7 +164,8 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask) kref_get(&desc->affinity_notify->kref); schedule_work(&desc->affinity_notify->work); } - desc->status |= IRQ_AFFINITY_SET; + irq_compat_set_affinity(desc); + irqd_set(&desc->irq_data, IRQD_AFFINITY_SET); raw_spin_unlock_irqrestore(&desc->lock, flags); return ret; } @@ -272,12 +273,14 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask) * Preserve an userspace affinity setup, but make sure that * one of the targets is online. */ - if (desc->status & (IRQ_AFFINITY_SET)) { + if (irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) { if (cpumask_intersects(desc->irq_data.affinity, cpu_online_mask)) set = desc->irq_data.affinity; - else - desc->status &= ~IRQ_AFFINITY_SET; + else { + irq_compat_clr_affinity(desc); + irqd_clear(&desc->irq_data, IRQD_AFFINITY_SET); + } } cpumask_and(mask, cpu_online_mask, set); diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index ba0fffe410a..da5acb446b1 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -29,6 +29,8 @@ enum { #define IRQ_PER_CPU GOT_YOU_MORON #undef IRQ_NO_BALANCING #define IRQ_NO_BALANCING GOT_YOU_MORON +#undef IRQ_AFFINITY_SET +#define IRQ_AFFINITY_SET GOT_YOU_MORON #undef IRQF_MODIFY_MASK #define IRQF_MODIFY_MASK GOT_YOU_MORON -- cgit v1.2.3-70-g09d2 From d4d5e08960844a062da8387ee5f16ca7a33200d0 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 10 Feb 2011 13:16:14 +0100 Subject: genirq: Add IRQCHIP_SET_TYPE_MASKED flag 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 Cc: Linus Walleij Cc: Lars-Peter Clausen --- include/linux/irq.h | 9 +++++++++ kernel/irq/chip.c | 4 ++-- kernel/irq/internals.h | 2 ++ kernel/irq/manage.c | 16 +++++++++++++--- 4 files changed, 26 insertions(+), 5 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index aefb30bbcf0..ef6b66dc9d0 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -308,6 +308,15 @@ struct irq_chip { #endif }; +/* + * irq_chip specific flags + * + * IRQCHIP_SET_TYPE_MASKED: Mask before calling chip.irq_set_type() + */ +enum { + IRQCHIP_SET_TYPE_MASKED = (1 << 0), +}; + /* This include will go away once we isolated irq_desc usage to core code */ #include diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 9e9220da4de..4687457fe7f 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -367,7 +367,7 @@ static inline void mask_ack_irq(struct irq_desc *desc) irq_state_set_masked(desc); } -static inline void mask_irq(struct irq_desc *desc) +void mask_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_mask) { desc->irq_data.chip->irq_mask(&desc->irq_data); @@ -375,7 +375,7 @@ static inline void mask_irq(struct irq_desc *desc) } } -static inline void unmask_irq(struct irq_desc *desc) +void unmask_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_unmask) { desc->irq_data.chip->irq_unmask(&desc->irq_data); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 6776453c454..1d500fbde0d 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -84,6 +84,8 @@ extern int irq_startup(struct irq_desc *desc); extern void irq_shutdown(struct irq_desc *desc); extern void irq_enable(struct irq_desc *desc); extern void irq_disable(struct irq_desc *desc); +extern void mask_irq(struct irq_desc *desc); +extern void unmask_irq(struct irq_desc *desc); extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index b5de828e58d..50809c79c7a 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -554,8 +554,8 @@ void compat_irq_chip_set_default_handler(struct irq_desc *desc) int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, unsigned long flags) { - int ret; struct irq_chip *chip = desc->irq_data.chip; + int ret, unmask = 0; if (!chip || !chip->irq_set_type) { /* @@ -568,6 +568,14 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, } flags &= IRQ_TYPE_SENSE_MASK; + + if (chip->flags & IRQCHIP_SET_TYPE_MASKED) { + if (!(desc->istate & IRQS_MASKED)) + mask_irq(desc); + if (!(desc->istate & IRQS_DISABLED)) + unmask = 1; + } + /* caller masked out all except trigger mode flags */ ret = chip->irq_set_type(&desc->irq_data, flags); @@ -588,11 +596,13 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, if (chip != desc->irq_data.chip) irq_chip_set_defaults(desc->irq_data.chip); - return 0; + ret = 0; default: pr_err("setting trigger mode %lu for irq %u failed (%pF)\n", flags, irq, chip->irq_set_type); } + if (unmask) + unmask_irq(desc); return ret; } @@ -669,7 +679,7 @@ again: #ifdef CONFIG_SMP /* - * Check whether we need to change the affinity of the interrupt thread. + * Check whether we need to chasnge the affinity of the interrupt thread. */ static void irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action) -- cgit v1.2.3-70-g09d2 From 7f94226f03299f1ca32f118f02f2a0295e0e5e93 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 10 Feb 2011 19:46:26 +0100 Subject: genirq: Move wakeup state to irq_data Some irq_chips need to know the state of wakeup mode for setting the trigger type etc. Reflect it in irq_data state. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 8 ++++++++ kernel/irq/internals.h | 2 -- kernel/irq/manage.c | 4 ++-- kernel/irq/pm.c | 2 +- 4 files changed, 11 insertions(+), 5 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irq.h b/include/linux/irq.h index ef6b66dc9d0..94c8f5bb548 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -168,6 +168,8 @@ struct irq_data { * IRQD_PER_CPU - Interrupt is per cpu * IRQD_AFFINITY_SET - Interrupt affinity was set * IRQD_LEVEL - Interrupt is level triggered + * IRQD_WAKEUP_STATE - Interrupt is configured for wakeup + * from suspend */ enum { IRQD_TRIGGER_MASK = 0xf, @@ -176,6 +178,7 @@ enum { IRQD_PER_CPU = (1 << 11), IRQD_AFFINITY_SET = (1 << 12), IRQD_LEVEL = (1 << 13), + IRQD_WAKEUP_STATE = (1 << 14), }; static inline bool irqd_is_setaffinity_pending(struct irq_data *d) @@ -217,6 +220,11 @@ static inline bool irqd_is_level_type(struct irq_data *d) return d->state_use_accessors & IRQD_LEVEL; } +static inline bool irqd_is_wakeup_set(struct irq_data *d) +{ + return d->state_use_accessors & IRQD_WAKEUP_STATE; +} + /** * struct irq_chip - hardware interrupt chip descriptor * diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 1d500fbde0d..5e2366da9f3 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -46,7 +46,6 @@ enum { * IRQS_PENDING - irq is pending and replayed later * IRQS_MASKED - irq is masked * IRQS_SUSPENDED - irq is suspended - * IRQS_WAKEUP - irq triggers system wakeup from suspend */ enum { IRQS_AUTODETECT = 0x00000001, @@ -60,7 +59,6 @@ enum { IRQS_PENDING = 0x00000200, IRQS_MASKED = 0x00000400, IRQS_SUSPENDED = 0x00000800, - IRQS_WAKEUP = 0x00001000, }; #include "compat.h" diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 50809c79c7a..ea6add6036b 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -492,7 +492,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on) if (ret) desc->wake_depth = 0; else - desc->istate |= IRQS_WAKEUP; + irqd_set(&desc->irq_data, IRQD_WAKEUP_STATE); } } else { if (desc->wake_depth == 0) { @@ -502,7 +502,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on) if (ret) desc->wake_depth = 1; else - desc->istate &= ~IRQS_WAKEUP; + irqd_clear(&desc->irq_data, IRQD_WAKEUP_STATE); } } diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index f39383d8672..1329f0eff49 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -69,7 +69,7 @@ int check_wakeup_irqs(void) int irq; for_each_irq_desc(irq, desc) - if ((desc->istate & IRQS_WAKEUP) && + if (irqd_is_wakeup_set(&desc->irq_data) && (desc->istate & IRQS_PENDING)) return -EBUSY; -- cgit v1.2.3-70-g09d2 From a6967caf00ebbb2d4acdebcb72a25f2e9ba43fd2 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 10 Feb 2011 22:01:25 +0100 Subject: genirq: Remove desc->status when GENERIC_HARDIRQS_NO_COMPAT=y 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 --- include/linux/irqdesc.h | 6 ++++++ kernel/irq/internals.h | 4 ++++ kernel/irq/settings.h | 1 + 3 files changed, 11 insertions(+) (limited to 'kernel/irq/internals.h') diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index 581d9665fd3..36c95f08023 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -64,7 +64,11 @@ struct irq_desc { unsigned int __percpu *kstat_irqs; irq_flow_handler_t handle_irq; struct irqaction *action; /* IRQ action list */ +#ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT + unsigned int status_use_accessors; +#else unsigned int status; /* IRQ status */ +#endif unsigned int core_internal_state__do_not_mess_with_it; unsigned int depth; /* nested irq disables */ unsigned int wake_depth; /* nested wake enables */ @@ -164,6 +168,7 @@ static inline int irq_has_action(unsigned int irq) return desc->action != NULL; } +#ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT static inline int irq_balancing_disabled(unsigned int irq) { struct irq_desc *desc; @@ -171,6 +176,7 @@ static inline int irq_balancing_disabled(unsigned int irq) desc = irq_to_desc(irq); return desc->status & IRQ_NO_BALANCING_MASK; } +#endif /* caller has locked the irq_desc and both params are valid */ static inline void __set_irq_handler_unlocked(int irq, diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 5e2366da9f3..fd5777ab2d3 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -15,6 +15,10 @@ #define istate core_internal_state__do_not_mess_with_it +#ifdef CONFIG_GENERIC_HARDIRQS_NO_COMPAT +# define status status_use_accessors +#endif + extern int noirqdebug; /* diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h index 55ebe1e09da..0227ad35827 100644 --- a/kernel/irq/settings.h +++ b/kernel/irq/settings.h @@ -134,4 +134,5 @@ static inline bool irq_settings_is_nested_thread(struct irq_desc *desc) } /* Nothing should touch desc->status from now on */ +#undef status #define status USE_THE_PROPER_WRAPPERS_YOU_MORON -- cgit v1.2.3-70-g09d2 From 091738a266fc74329ae186f22ff2b3f01319112d Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 14 Feb 2011 20:16:43 +0100 Subject: genirq: Remove real old transition functions These transition helpers are stale for years now. Remove them. Signed-off-by: Thomas Gleixner --- kernel/irq/autoprobe.c | 6 ------ kernel/irq/chip.c | 16 ++++------------ kernel/irq/internals.h | 3 --- kernel/irq/manage.c | 14 +------------- 4 files changed, 5 insertions(+), 34 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index c8bbc4fabaa..394784c5706 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -46,12 +46,6 @@ unsigned long probe_irq_on(void) for_each_irq_desc_reverse(i, desc) { raw_spin_lock_irq(&desc->lock); if (!desc->action && irq_settings_can_probe(desc)) { - /* - * An old-style architecture might still have - * the handle_bad_irq handler there: - */ - compat_irq_chip_set_default_handler(desc); - /* * Some chips need to know about probing in * progress: diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 2b0f9192a83..c19c0b562c8 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -644,19 +644,11 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, return; } - if (!handle) + if (!handle) { handle = handle_bad_irq; - else if (desc->irq_data.chip == &no_irq_chip) { - printk(KERN_WARNING "Trying to install %sinterrupt handler " - "for IRQ%d\n", is_chained ? "chained " : "", irq); - /* - * Some ARM implementations install a handler for really dumb - * interrupt hardware without setting an irq_chip. This worked - * with the ARM no_irq_chip but the check in setup_irq would - * prevent us to setup the interrupt at all. Switch it to - * dummy_irq_chip for easy transition. - */ - desc->irq_data.chip = &dummy_irq_chip; + } else { + if (WARN_ON(desc->irq_data.chip == &no_irq_chip)) + return; } chip_bus_lock(desc); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index fd5777ab2d3..f80a7747161 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -74,9 +74,6 @@ enum { /* Set default functions for irq_chip structures: */ extern void irq_chip_set_defaults(struct irq_chip *chip); -/* Set default handler: */ -extern void compat_irq_chip_set_default_handler(struct irq_desc *desc); - extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, unsigned long flags); extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index ea6add6036b..99395a24f43 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -540,17 +540,6 @@ int can_request_irq(unsigned int irq, unsigned long irqflags) return !action; } -void compat_irq_chip_set_default_handler(struct irq_desc *desc) -{ - /* - * If the architecture still has not overriden - * the flow handler then zap the default. This - * should catch incorrect flow-type setting. - */ - if (desc->handle_irq == &handle_bad_irq) - desc->handle_irq = NULL; -} - int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, unsigned long flags) { @@ -912,8 +901,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) if (ret) goto out_mask; - } else - compat_irq_chip_set_default_handler(desc); + } desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \ IRQS_INPROGRESS | IRQS_ONESHOT | \ -- cgit v1.2.3-70-g09d2 From d5eb4ad2dfb2dfae43fd51bc8630b4fc3ef00e92 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sat, 12 Feb 2011 12:16:16 +0100 Subject: genirq: Implement irq_get/put_desc_[bus]locked/unlock() Most of the managing functions get the irq descriptor and lock it - either with or without buslock. Instead of open coding this over and over provide a common function to do that. Signed-off-by: Thomas Gleixner --- kernel/irq/internals.h | 28 ++++++++++++++++++++++++++++ kernel/irq/irqdesc.c | 20 ++++++++++++++++++++ 2 files changed, 48 insertions(+) (limited to 'kernel/irq/internals.h') diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index f80a7747161..935bec4bfa8 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -126,6 +126,34 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc) desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); } +struct irq_desc * +__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus); +void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); + +static inline struct irq_desc * +irq_get_desc_buslock(unsigned int irq, unsigned long *flags) +{ + return __irq_get_desc_lock(irq, flags, true); +} + +static inline void +irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) +{ + __irq_put_desc_unlock(desc, flags, true); +} + +static inline struct irq_desc * +irq_get_desc_lock(unsigned int irq, unsigned long *flags) +{ + return __irq_get_desc_lock(irq, flags, false); +} + +static inline void +irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) +{ + __irq_put_desc_unlock(desc, flags, false); +} + /* * Manipulation functions for irq_data.state */ diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 3387fbd7f2f..394ab6a6c62 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -402,6 +402,26 @@ unsigned int irq_get_next_irq(unsigned int offset) return find_next_bit(allocated_irqs, nr_irqs, offset); } +struct irq_desc * +__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus) +{ + struct irq_desc *desc = irq_to_desc(irq); + + if (desc) { + if (bus) + chip_bus_lock(desc); + raw_spin_lock_irqsave(&desc->lock, *flags); + } + return desc; +} + +void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus) +{ + raw_spin_unlock_irqrestore(&desc->lock, flags); + if (bus) + chip_bus_sync_unlock(desc); +} + /** * dynamic_irq_cleanup - cleanup a dynamically allocated irq * @irq: irq number to initialize -- cgit v1.2.3-70-g09d2 From 8d32a307e4faa8b123dc8a9cd56d1a7525f69ad3 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 23 Feb 2011 23:52:23 +0000 Subject: genirq: Provide forced interrupt threading Add a commandline parameter "threadirqs" which forces all interrupts except those marked IRQF_NO_THREAD to run threaded. That's mostly a debug option to allow retrieving better debug data from crashing interrupt handlers. If "threadirqs" is not enabled on the kernel command line, then there is no impact in the interrupt hotpath. Architecture code needs to select CONFIG_IRQ_FORCED_THREADING after marking the interrupts which cant be threaded IRQF_NO_THREAD. All interrupts which have IRQF_TIMER set are implict marked IRQF_NO_THREAD. Also all PER_CPU interrupts are excluded. Forced threading hard interrupts also forces all soft interrupt handling into thread context. When enabled it might slow down things a bit, but for debugging problems in interrupt code it's a reasonable penalty as it does not immediately crash and burn the machine when an interrupt handler is buggy. Some test results on a Core2Duo machine: Cache cold run of: # time git grep irq_desc non-threaded threaded real 1m18.741s 1m19.061s user 0m1.874s 0m1.757s sys 0m5.843s 0m5.427s # iperf -c server non-threaded [ 3] 0.0-10.0 sec 1.09 GBytes 933 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 934 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 933 Mbits/sec threaded [ 3] 0.0-10.0 sec 1.09 GBytes 939 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 934 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 937 Mbits/sec Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra LKML-Reference: <20110223234956.772668648@linutronix.de> --- Documentation/kernel-parameters.txt | 4 +++ include/linux/interrupt.h | 7 ++++ kernel/irq/Kconfig | 3 ++ kernel/irq/internals.h | 2 ++ kernel/irq/manage.c | 67 ++++++++++++++++++++++++++++++++++--- kernel/softirq.c | 16 +++++++-- 6 files changed, 93 insertions(+), 6 deletions(-) (limited to 'kernel/irq/internals.h') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 89835a4766a..cac6cf9a588 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2436,6 +2436,10 @@ and is between 256 and 4096 characters. It is defined in the file : poll all this frequency 0: no polling (default) + threadirqs [KNL] + Force threading of all interrupt handlers except those + marked explicitely IRQF_NO_THREAD. + topology= [S390] Format: {off | on} Specify if the kernel should make use of the cpu diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 0fc3eb9397b..f8a8af108e0 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -383,6 +383,13 @@ static inline int disable_irq_wake(unsigned int irq) } #endif /* CONFIG_GENERIC_HARDIRQS */ + +#ifdef CONFIG_IRQ_FORCED_THREADING +extern bool force_irqthreads; +#else +#define force_irqthreads (0) +#endif + #ifndef __ARCH_SET_SOFTIRQ_PENDING #define set_softirq_pending(x) (local_softirq_pending() = (x)) #define or_softirq_pending(x) (local_softirq_pending() |= (x)) diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 355b8c7957f..144db9dcfcd 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -38,6 +38,9 @@ config HARDIRQS_SW_RESEND config IRQ_PREFLOW_FASTEOI bool +config IRQ_FORCED_THREADING + bool + config SPARSE_IRQ bool "Support sparse irq numbering" depends on HAVE_SPARSE_IRQ diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 935bec4bfa8..6c6ec9a4902 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -27,12 +27,14 @@ extern int noirqdebug; * IRQTF_DIED - handler thread died * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed * IRQTF_AFFINITY - irq thread is requested to adjust affinity + * IRQTF_FORCED_THREAD - irq action is force threaded */ enum { IRQTF_RUNTHREAD, IRQTF_DIED, IRQTF_WARNED, IRQTF_AFFINITY, + IRQTF_FORCED_THREAD, }; /* diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 58c86136730..acd599a43bf 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -17,6 +17,17 @@ #include "internals.h" +#ifdef CONFIG_IRQ_FORCED_THREADING +__read_mostly bool force_irqthreads; + +static int __init setup_forced_irqthreads(char *arg) +{ + force_irqthreads = true; + return 0; +} +early_param("threadirqs", setup_forced_irqthreads); +#endif + /** * synchronize_irq - wait for pending IRQ handlers (on other CPUs) * @irq: interrupt number to wait for @@ -701,6 +712,32 @@ static inline void irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action) { } #endif +/* + * Interrupts which are not explicitely requested as threaded + * interrupts rely on the implicit bh/preempt disable of the hard irq + * context. So we need to disable bh here to avoid deadlocks and other + * side effects. + */ +static void +irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action) +{ + local_bh_disable(); + action->thread_fn(action->irq, action->dev_id); + irq_finalize_oneshot(desc, action, false); + local_bh_enable(); +} + +/* + * Interrupts explicitely requested as threaded interupts want to be + * preemtible - many of them need to sleep and wait for slow busses to + * complete. + */ +static void irq_thread_fn(struct irq_desc *desc, struct irqaction *action) +{ + action->thread_fn(action->irq, action->dev_id); + irq_finalize_oneshot(desc, action, false); +} + /* * Interrupt handler thread */ @@ -711,8 +748,15 @@ static int irq_thread(void *data) }; struct irqaction *action = data; struct irq_desc *desc = irq_to_desc(action->irq); + void (*handler_fn)(struct irq_desc *desc, struct irqaction *action); int wake; + if (force_irqthreads & test_bit(IRQTF_FORCED_THREAD, + &action->thread_flags)) + handler_fn = irq_forced_thread_fn; + else + handler_fn = irq_thread_fn; + sched_setscheduler(current, SCHED_FIFO, ¶m); current->irqaction = action; @@ -736,10 +780,7 @@ static int irq_thread(void *data) raw_spin_unlock_irq(&desc->lock); } else { raw_spin_unlock_irq(&desc->lock); - - action->thread_fn(action->irq, action->dev_id); - - irq_finalize_oneshot(desc, action, false); + handler_fn(desc, action); } wake = atomic_dec_and_test(&desc->threads_active); @@ -789,6 +830,22 @@ void exit_irq_thread(void) set_bit(IRQTF_DIED, &tsk->irqaction->flags); } +static void irq_setup_forced_threading(struct irqaction *new) +{ + if (!force_irqthreads) + return; + if (new->flags & (IRQF_NO_THREAD | IRQF_PERCPU | IRQF_ONESHOT)) + return; + + new->flags |= IRQF_ONESHOT; + + if (!new->thread_fn) { + set_bit(IRQTF_FORCED_THREAD, &new->thread_flags); + new->thread_fn = new->handler; + new->handler = irq_default_primary_handler; + } +} + /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. @@ -838,6 +895,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) * dummy function which warns when called. */ new->handler = irq_nested_primary_handler; + } else { + irq_setup_forced_threading(new); } /* diff --git a/kernel/softirq.c b/kernel/softirq.c index c0490464e92..a33fb291124 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -311,9 +311,21 @@ void irq_enter(void) } #ifdef __ARCH_IRQ_EXIT_IRQS_DISABLED -# define invoke_softirq() __do_softirq() +static inline void invoke_softirq(void) +{ + if (!force_irqthreads) + __do_softirq(); + else + wakeup_softirqd(); +} #else -# define invoke_softirq() do_softirq() +static inline void invoke_softirq(void) +{ + if (!force_irqthreads) + do_softirq(); + else + wakeup_softirqd(); +} #endif /* -- cgit v1.2.3-70-g09d2