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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 <tglx@linutronix.de>
Cc: David Daney <ddaney@caviumnetworks.com>
hifive-unleashed-5.1
Thomas Gleixner 2011-03-28 14:10:52 +02:00
parent c2d0c555c2
commit 32f4125ebf
9 changed files with 64 additions and 59 deletions
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17
include/linux/irq.h
View File

@ -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
*

40
kernel/irq/chip.c
View File

@ -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);

10
kernel/irq/debug.h
View File

@ -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

4
kernel/irq/handle.c
View File

@ -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;
}

6
kernel/irq/internals.h
View File

@ -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,
};

2
kernel/irq/irqdesc.c
View File

@ -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),

30
kernel/irq/manage.c
View File

@ -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);

4
kernel/irq/migration.c
View File

@ -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);

10
kernel/irq/spurious.c
View File

@ -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