From 32f4125ebffee4f3c4dbc6a437fc656129eb9e60 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 28 Mar 2011 14:10:52 +0200 Subject: genirq: Move INPROGRESS, MASKED and DISABLED state flags to irq_data We really need these flags for some of the interrupt chips. Move it from internal state to irq_data and provide proper accessors. Signed-off-by: Thomas Gleixner Cc: David Daney --- include/linux/irq.h | 17 +++++++++++++++-- kernel/irq/chip.c | 40 +++++++++++++++++++--------------------- kernel/irq/debug.h | 10 +++++++--- kernel/irq/handle.c | 4 ++-- kernel/irq/internals.h | 6 ------ kernel/irq/irqdesc.c | 2 -- kernel/irq/manage.c | 30 ++++++++++++++---------------- kernel/irq/migration.c | 4 ++-- kernel/irq/spurious.c | 10 +++++----- 9 files changed, 64 insertions(+), 59 deletions(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index a10717e1c1f..18aacccb0fa 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -174,8 +174,9 @@ struct irq_data { * from suspend * IRDQ_MOVE_PCNTXT - Interrupt can be moved in process * context - * IRQD_IRQ_DISABLED - Some chip function need to know the - * disabled state. + * IRQD_IRQ_DISABLED - Disabled state of the interrupt + * IRQD_IRQ_MASKED - Masked state of the interrupt + * IRQD_IRQ_INPROGRESS - In progress state of the interrupt */ enum { IRQD_TRIGGER_MASK = 0xf, @@ -187,6 +188,8 @@ enum { IRQD_WAKEUP_STATE = (1 << 14), IRQD_MOVE_PCNTXT = (1 << 15), IRQD_IRQ_DISABLED = (1 << 16), + IRQD_IRQ_MASKED = (1 << 17), + IRQD_IRQ_INPROGRESS = (1 << 18), }; static inline bool irqd_is_setaffinity_pending(struct irq_data *d) @@ -243,6 +246,16 @@ static inline bool irqd_irq_disabled(struct irq_data *d) return d->state_use_accessors & IRQD_IRQ_DISABLED; } +static inline bool irqd_irq_masked(struct irq_data *d) +{ + return d->state_use_accessors & IRQD_IRQ_MASKED; +} + +static inline bool irqd_irq_inprogress(struct irq_data *d) +{ + return d->state_use_accessors & IRQD_IRQ_INPROGRESS; +} + /** * struct irq_chip - hardware interrupt chip descriptor * diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 9283d3300ea..e00bdc56269 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -140,27 +140,25 @@ EXPORT_SYMBOL_GPL(irq_get_irq_data); static void irq_state_clr_disabled(struct irq_desc *desc) { - desc->istate &= ~IRQS_DISABLED; irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED); irq_compat_clr_disabled(desc); } static void irq_state_set_disabled(struct irq_desc *desc) { - desc->istate |= IRQS_DISABLED; irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED); irq_compat_set_disabled(desc); } static void irq_state_clr_masked(struct irq_desc *desc) { - desc->istate &= ~IRQS_MASKED; + irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED); irq_compat_clr_masked(desc); } static void irq_state_set_masked(struct irq_desc *desc) { - desc->istate |= IRQS_MASKED; + irqd_set(&desc->irq_data, IRQD_IRQ_MASKED); irq_compat_set_masked(desc); } @@ -380,11 +378,11 @@ void handle_nested_irq(unsigned int irq) kstat_incr_irqs_this_cpu(irq, desc); action = desc->action; - if (unlikely(!action || (desc->istate & IRQS_DISABLED))) + if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) goto out_unlock; irq_compat_set_progress(desc); - desc->istate |= IRQS_INPROGRESS; + irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS); raw_spin_unlock_irq(&desc->lock); action_ret = action->thread_fn(action->irq, action->dev_id); @@ -392,7 +390,7 @@ void handle_nested_irq(unsigned int irq) note_interrupt(irq, desc, action_ret); raw_spin_lock_irq(&desc->lock); - desc->istate &= ~IRQS_INPROGRESS; + irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS); irq_compat_clr_progress(desc); out_unlock: @@ -424,14 +422,14 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc) { raw_spin_lock(&desc->lock); - if (unlikely(desc->istate & IRQS_INPROGRESS)) + if (unlikely(irqd_irq_inprogress(&desc->irq_data))) if (!irq_check_poll(desc)) goto out_unlock; desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); kstat_incr_irqs_this_cpu(irq, desc); - if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) + if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) goto out_unlock; handle_irq_event(desc); @@ -456,7 +454,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc) raw_spin_lock(&desc->lock); mask_ack_irq(desc); - if (unlikely(desc->istate & IRQS_INPROGRESS)) + if (unlikely(irqd_irq_inprogress(&desc->irq_data))) if (!irq_check_poll(desc)) goto out_unlock; @@ -467,12 +465,12 @@ 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->istate & IRQS_DISABLED))) + if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) goto out_unlock; handle_irq_event(desc); - if (!(desc->istate & (IRQS_DISABLED | IRQS_ONESHOT))) + if (!irqd_irq_disabled(&desc->irq_data) && !(desc->istate & IRQS_ONESHOT)) unmask_irq(desc); out_unlock: raw_spin_unlock(&desc->lock); @@ -504,7 +502,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc) { raw_spin_lock(&desc->lock); - if (unlikely(desc->istate & IRQS_INPROGRESS)) + if (unlikely(irqd_irq_inprogress(&desc->irq_data))) if (!irq_check_poll(desc)) goto out; @@ -515,7 +513,7 @@ 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->istate & IRQS_DISABLED))) { + if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { irq_compat_set_pending(desc); desc->istate |= IRQS_PENDING; mask_irq(desc); @@ -566,8 +564,8 @@ 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_DISABLED | IRQS_INPROGRESS) || - !desc->action))) { + if (unlikely(irqd_irq_disabled(&desc->irq_data) || + irqd_irq_inprogress(&desc->irq_data) || !desc->action)) { if (!irq_check_poll(desc)) { irq_compat_set_pending(desc); desc->istate |= IRQS_PENDING; @@ -592,15 +590,15 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc) * Renable it, if it was not disabled in meantime. */ if (unlikely(desc->istate & IRQS_PENDING)) { - if (!(desc->istate & IRQS_DISABLED) && - (desc->istate & IRQS_MASKED)) + if (!irqd_irq_disabled(&desc->irq_data) && + irqd_irq_masked(&desc->irq_data)) unmask_irq(desc); } handle_irq_event(desc); } while ((desc->istate & IRQS_PENDING) && - !(desc->istate & IRQS_DISABLED)); + !irqd_irq_disabled(&desc->irq_data)); out_unlock: raw_spin_unlock(&desc->lock); @@ -720,7 +718,7 @@ void irq_cpu_online(void) chip = irq_data_get_irq_chip(&desc->irq_data); if (chip && chip->irq_cpu_online && (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) || - !(desc->istate & IRQS_DISABLED))) + !irqd_irq_disabled(&desc->irq_data))) chip->irq_cpu_online(&desc->irq_data); raw_spin_unlock_irqrestore(&desc->lock, flags); @@ -750,7 +748,7 @@ void irq_cpu_offline(void) chip = irq_data_get_irq_chip(&desc->irq_data); if (chip && chip->irq_cpu_offline && (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) || - !(desc->istate & IRQS_DISABLED))) + !irqd_irq_disabled(&desc->irq_data))) chip->irq_cpu_offline(&desc->irq_data); raw_spin_unlock_irqrestore(&desc->lock, flags); diff --git a/kernel/irq/debug.h b/kernel/irq/debug.h index d1a33b7fa61..a0bd875ba3d 100644 --- a/kernel/irq/debug.h +++ b/kernel/irq/debug.h @@ -6,6 +6,8 @@ #define P(f) if (desc->status & f) printk("%14s set\n", #f) #define PS(f) if (desc->istate & f) printk("%14s set\n", #f) +/* FIXME */ +#define PD(f) do { } while (0) static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) { @@ -28,13 +30,15 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc) P(IRQ_NOAUTOEN); PS(IRQS_AUTODETECT); - PS(IRQS_INPROGRESS); PS(IRQS_REPLAY); PS(IRQS_WAITING); - PS(IRQS_DISABLED); PS(IRQS_PENDING); - PS(IRQS_MASKED); + + PD(IRQS_INPROGRESS); + PD(IRQS_DISABLED); + PD(IRQS_MASKED); } #undef P #undef PS +#undef PD diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index 517561fc731..60fd5cd75c7 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -178,13 +178,13 @@ irqreturn_t handle_irq_event(struct irq_desc *desc) irq_compat_clr_pending(desc); desc->istate &= ~IRQS_PENDING; irq_compat_set_progress(desc); - desc->istate |= IRQS_INPROGRESS; + irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS); raw_spin_unlock(&desc->lock); ret = handle_irq_event_percpu(desc, action); raw_spin_lock(&desc->lock); - desc->istate &= ~IRQS_INPROGRESS; + irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS); irq_compat_clr_progress(desc); return ret; } diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 6c6ec9a4902..6b8b9713e28 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -44,26 +44,20 @@ enum { * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt * detection * 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 - * 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, IRQS_SPURIOUS_DISABLED = 0x00000002, IRQS_POLL_INPROGRESS = 0x00000008, - IRQS_INPROGRESS = 0x00000010, IRQS_ONESHOT = 0x00000020, IRQS_REPLAY = 0x00000040, IRQS_WAITING = 0x00000080, - IRQS_DISABLED = 0x00000100, IRQS_PENDING = 0x00000200, - IRQS_MASKED = 0x00000400, IRQS_SUSPENDED = 0x00000800, }; diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 96c3268a509..2c039c9b938 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -81,7 +81,6 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node) desc->irq_data.msi_desc = NULL; irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS); irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED); - desc->istate = IRQS_DISABLED; desc->handle_irq = handle_bad_irq; desc->depth = 1; desc->irq_count = 0; @@ -239,7 +238,6 @@ int __init early_irq_init(void) struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = { [0 ... NR_IRQS-1] = { - .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 3d151fd762a..6e8acb75599 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -41,7 +41,7 @@ early_param("threadirqs", setup_forced_irqthreads); void synchronize_irq(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); - unsigned int state; + bool inprogress; if (!desc) return; @@ -53,16 +53,16 @@ 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->istate & IRQS_INPROGRESS) + while (irqd_irq_inprogress(&desc->irq_data)) cpu_relax(); /* Ok, that indicated we're done: double-check carefully. */ raw_spin_lock_irqsave(&desc->lock, flags); - state = desc->istate; + inprogress = irqd_irq_inprogress(&desc->irq_data); raw_spin_unlock_irqrestore(&desc->lock, flags); /* Oops, that failed? */ - } while (state & IRQS_INPROGRESS); + } while (inprogress); /* * We made sure that no hardirq handler is running. Now verify @@ -563,9 +563,9 @@ 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)) + if (!irqd_irq_masked(&desc->irq_data)) mask_irq(desc); - if (!(desc->istate & IRQS_DISABLED)) + if (!irqd_irq_disabled(&desc->irq_data)) unmask = 1; } @@ -663,7 +663,7 @@ again: * irq_wake_thread(). See the comment there which explains the * serialization. */ - if (unlikely(desc->istate & IRQS_INPROGRESS)) { + if (unlikely(irqd_irq_inprogress(&desc->irq_data))) { raw_spin_unlock_irq(&desc->lock); chip_bus_sync_unlock(desc); cpu_relax(); @@ -680,12 +680,10 @@ again: desc->threads_oneshot &= ~action->thread_mask; - if (!desc->threads_oneshot && !(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); - } + if (!desc->threads_oneshot && !irqd_irq_disabled(&desc->irq_data) && + irqd_irq_masked(&desc->irq_data)) + unmask_irq(desc); + out_unlock: raw_spin_unlock_irq(&desc->lock); chip_bus_sync_unlock(desc); @@ -779,7 +777,7 @@ static int irq_thread(void *data) atomic_inc(&desc->threads_active); raw_spin_lock_irq(&desc->lock); - if (unlikely(desc->istate & IRQS_DISABLED)) { + if (unlikely(irqd_irq_disabled(&desc->irq_data))) { /* * CHECKME: We might need a dedicated * IRQ_THREAD_PENDING flag here, which @@ -997,8 +995,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) } desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \ - IRQS_INPROGRESS | IRQS_ONESHOT | \ - IRQS_WAITING); + IRQS_ONESHOT | IRQS_WAITING); + irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS); if (new->flags & IRQF_PERCPU) { irqd_set(&desc->irq_data, IRQD_PER_CPU); diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index ec4806d4778..5e81d34b08d 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -66,7 +66,7 @@ void irq_move_irq(struct irq_data *idata) if (likely(!irqd_is_setaffinity_pending(idata))) return; - if (unlikely(desc->istate & IRQS_DISABLED)) + if (unlikely(irqd_irq_disabled(idata))) return; /* @@ -74,7 +74,7 @@ void irq_move_irq(struct irq_data *idata) * threaded interrupt with ONESHOT set, we can end up with an * interrupt storm. */ - masked = desc->istate & IRQS_MASKED; + masked = irqd_irq_masked(idata); if (!masked) idata->chip->irq_mask(idata); irq_move_masked_irq(idata); diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index dd586ebf9c8..cd424cdf17f 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -45,12 +45,12 @@ bool irq_wait_for_poll(struct irq_desc *desc) #ifdef CONFIG_SMP do { raw_spin_unlock(&desc->lock); - while (desc->istate & IRQS_INPROGRESS) + while (irqd_irq_inprogress(&desc->irq_data)) cpu_relax(); raw_spin_lock(&desc->lock); - } while (desc->istate & IRQS_INPROGRESS); + } while irqd_irq_inprogress(&desc->irq_data); /* Might have been disabled in meantime */ - return !(desc->istate & IRQS_DISABLED) && desc->action; + return !irqd_irq_disabled(&desc->irq_data) && 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->istate & IRQS_DISABLED) && !force) + if (irqd_irq_disabled(&desc->irq_data) && !force) goto out; /* @@ -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->istate & IRQS_INPROGRESS) { + if (irqd_irq_inprogress(&desc->irq_data)) { /* * Already running: If it is shared get the other * CPU to go looking for our mystery interrupt too -- cgit v1.2.3-18-g5258