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genirq: Move IRQ_DISABLED to core 

Keep status in sync until all abusers are fixed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-02-07 22:11:30 +01:00
parent 163ef30911
commit c1594b77e4
9 changed files with 57 additions and 25 deletions
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4
include/linux/irq.h
View File

@ -55,9 +55,9 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_INPROGRESS 0x00000100 /* DEPRECATED */ #define IRQ_INPROGRESS 0x00000100 /* DEPRECATED */
#define IRQ_REPLAY 0x00000200 /* DEPRECATED */ #define IRQ_REPLAY 0x00000200 /* DEPRECATED */
#define IRQ_WAITING 0x00000400 /* DEPRECATED */ #define IRQ_WAITING 0x00000400 /* DEPRECATED */
#define IRQ_DISABLED 0x00000800 /* DEPRECATED */
#endif #endif
#define IRQ_DISABLED 0x00000800 /* IRQ disabled - do not enter! */
#define IRQ_PENDING 0x00001000 /* IRQ pending - replay on enable */ #define IRQ_PENDING 0x00001000 /* IRQ pending - replay on enable */
#define IRQ_LEVEL 0x00004000 /* IRQ level triggered */ #define IRQ_LEVEL 0x00004000 /* IRQ level triggered */
@ -231,7 +231,7 @@ struct irq_chip {
# define ARCH_IRQ_INIT_FLAGS 0 # define ARCH_IRQ_INIT_FLAGS 0
#endif #endif
#define IRQ_DEFAULT_INIT_FLAGS (IRQ_DISABLED | ARCH_IRQ_INIT_FLAGS) #define IRQ_DEFAULT_INIT_FLAGS ARCH_IRQ_INIT_FLAGS
struct irqaction; struct irqaction;
extern int setup_irq(unsigned int irq, struct irqaction *new); extern int setup_irq(unsigned int irq, struct irqaction *new);

46
kernel/irq/chip.c
View File

@ -164,9 +164,21 @@ struct irq_data *irq_get_irq_data(unsigned int irq)
} }
EXPORT_SYMBOL_GPL(irq_get_irq_data); 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) int irq_startup(struct irq_desc *desc)
{ {
desc->status &= ~IRQ_DISABLED; irq_state_clr_disabled(desc);
desc->depth = 0; desc->depth = 0;
if (desc->irq_data.chip->irq_startup) { 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) void irq_shutdown(struct irq_desc *desc)
{ {
desc->status |= IRQ_DISABLED; irq_state_set_disabled(desc);
desc->depth = 1; desc->depth = 1;
if (desc->irq_data.chip->irq_shutdown) if (desc->irq_data.chip->irq_shutdown)
desc->irq_data.chip->irq_shutdown(&desc->irq_data); 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) void irq_enable(struct irq_desc *desc)
{ {
desc->status &= ~IRQ_DISABLED; irq_state_clr_disabled(desc);
if (desc->irq_data.chip->irq_enable) if (desc->irq_data.chip->irq_enable)
desc->irq_data.chip->irq_enable(&desc->irq_data); desc->irq_data.chip->irq_enable(&desc->irq_data);
else else
@ -204,7 +216,7 @@ void irq_enable(struct irq_desc *desc)
void irq_disable(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) { if (desc->irq_data.chip->irq_disable) {
desc->irq_data.chip->irq_disable(&desc->irq_data); desc->irq_data.chip->irq_disable(&desc->irq_data);
desc->status |= IRQ_MASKED; desc->status |= IRQ_MASKED;
@ -380,7 +392,7 @@ void handle_nested_irq(unsigned int irq)
kstat_incr_irqs_this_cpu(irq, desc); kstat_incr_irqs_this_cpu(irq, desc);
action = desc->action; action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED))) if (unlikely(!action || (desc->istate & IRQS_DISABLED)))
goto out_unlock; goto out_unlock;
irq_compat_set_progress(desc); 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); desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
kstat_incr_irqs_this_cpu(irq, desc); 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; goto out_unlock;
handle_irq_event(desc); 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 * If its disabled or no action available
* keep it masked and get out of here * 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; goto out_unlock;
handle_irq_event(desc); handle_irq_event(desc);
if (!(desc->status & IRQ_DISABLED) && !(desc->istate & IRQS_ONESHOT)) if (!(desc->istate & (IRQS_DISABLED | IRQS_ONESHOT)))
unmask_irq(desc); unmask_irq(desc);
out_unlock: out_unlock:
raw_spin_unlock(&desc->lock); 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 * If its disabled or no action available
* then mask it and get out of here: * 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; desc->status |= IRQ_PENDING;
mask_irq(desc); mask_irq(desc);
goto out; 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 * we shouldn't process the IRQ. Mark it pending, handle
* the necessary masking and go out * the necessary masking and go out
*/ */
if (unlikely((desc->istate & (IRQS_INPROGRESS) || if (unlikely((desc->istate & (IRQS_DISABLED | IRQS_INPROGRESS) ||
(desc->status & IRQ_DISABLED) || !desc->action))) { !desc->action))) {
if (!irq_check_poll(desc)) { if (!irq_check_poll(desc)) {
desc->status |= IRQ_PENDING; desc->status |= IRQ_PENDING;
mask_ack_irq(desc); 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. * one, we could have masked the irq.
* Renable it, if it was not disabled in meantime. * Renable it, if it was not disabled in meantime.
*/ */
if (unlikely((desc->status & if (unlikely(desc->status & IRQ_PENDING)) {
(IRQ_PENDING | IRQ_MASKED | IRQ_DISABLED)) == if (!(desc->istate & IRQS_DISABLED) &&
(IRQ_PENDING | IRQ_MASKED))) { (desc->status & IRQ_MASKED))
unmask_irq(desc); unmask_irq(desc);
} }
handle_irq_event(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: out_unlock:
raw_spin_unlock(&desc->lock); 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 (handle == handle_bad_irq) {
if (desc->irq_data.chip != &no_irq_chip) if (desc->irq_data.chip != &no_irq_chip)
mask_ack_irq(desc); mask_ack_irq(desc);
desc->status |= IRQ_DISABLED; irq_compat_set_disabled(desc);
desc->istate |= IRQS_DISABLED;
desc->depth = 1; desc->depth = 1;
} }
desc->handle_irq = handle; desc->handle_irq = handle;

12
kernel/irq/compat.h
View File

@ -11,7 +11,19 @@ static inline void irq_compat_clr_progress(struct irq_desc *desc)
{ {
desc->status &= ~IRQ_INPROGRESS; 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 #else
static inline void irq_compat_set_progress(struct irq_desc *desc) { } 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_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 #endif

4
kernel/irq/internals.h
View File

@ -45,6 +45,7 @@ enum {
* IRQS_ONESHOT - irq is not unmasked in primary handler * IRQS_ONESHOT - irq is not unmasked in primary handler
* IRQS_REPLAY - irq is replayed * IRQS_REPLAY - irq is replayed
* IRQS_WAITING - irq is waiting * IRQS_WAITING - irq is waiting
* IRQS_DISABLED - irq is disabled
*/ */
enum { enum {
IRQS_AUTODETECT = 0x00000001, IRQS_AUTODETECT = 0x00000001,
@ -54,6 +55,7 @@ enum {
IRQS_ONESHOT = 0x00000020, IRQS_ONESHOT = 0x00000020,
IRQS_REPLAY = 0x00000040, IRQS_REPLAY = 0x00000040,
IRQS_WAITING = 0x00000080, IRQS_WAITING = 0x00000080,
IRQS_DISABLED = 0x00000100,
}; };
#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) #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); print_symbol("%s\n", (unsigned long)desc->action->handler);
} }
P(IRQ_DISABLED);
P(IRQ_PENDING); P(IRQ_PENDING);
P(IRQ_LEVEL); P(IRQ_LEVEL);
P(IRQ_MASKED); 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_INPROGRESS);
PS(IRQS_REPLAY); PS(IRQS_REPLAY);
PS(IRQS_WAITING); PS(IRQS_WAITING);
PS(IRQS_DISABLED);
} }
#undef P #undef P

2
kernel/irq/irqdesc.c
View File

@ -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.handler_data = NULL;
desc->irq_data.msi_desc = NULL; desc->irq_data.msi_desc = NULL;
desc->status = _IRQ_DEFAULT_INIT_FLAGS; desc->status = _IRQ_DEFAULT_INIT_FLAGS;
desc->istate = IRQS_DISABLED;
desc->handle_irq = handle_bad_irq; desc->handle_irq = handle_bad_irq;
desc->depth = 1; desc->depth = 1;
desc->irq_count = 0; 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 = { struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = { [0 ... NR_IRQS-1] = {
.status = _IRQ_DEFAULT_INIT_FLAGS, .status = _IRQ_DEFAULT_INIT_FLAGS,
.istate = IRQS_DISABLED,
.handle_irq = handle_bad_irq, .handle_irq = handle_bad_irq,
.depth = 1, .depth = 1,
.lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock), .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),

4
kernel/irq/manage.c
View File

@ -646,7 +646,7 @@ again:
goto 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->status &= ~IRQ_MASKED;
desc->irq_data.chip->irq_unmask(&desc->irq_data); desc->irq_data.chip->irq_unmask(&desc->irq_data);
} }
@ -709,7 +709,7 @@ static int irq_thread(void *data)
atomic_inc(&desc->threads_active); atomic_inc(&desc->threads_active);
raw_spin_lock_irq(&desc->lock); raw_spin_lock_irq(&desc->lock);
if (unlikely(desc->status & IRQ_DISABLED)) { if (unlikely(desc->istate & IRQS_DISABLED)) {
/* /*
* CHECKME: We might need a dedicated * CHECKME: We might need a dedicated
* IRQ_THREAD_PENDING flag here, which * IRQ_THREAD_PENDING flag here, which

2
kernel/irq/migration.c
View File

@ -61,7 +61,7 @@ void move_native_irq(int irq)
if (likely(!(desc->status & IRQ_MOVE_PENDING))) if (likely(!(desc->status & IRQ_MOVE_PENDING)))
return; return;
if (unlikely(desc->status & IRQ_DISABLED)) if (unlikely(desc->istate & IRQS_DISABLED))
return; return;
/* /*

2
kernel/irq/settings.h
View File

@ -12,3 +12,5 @@ enum {
#define IRQ_REPLAY GOT_YOU_MORON #define IRQ_REPLAY GOT_YOU_MORON
#undef IRQ_WAITING #undef IRQ_WAITING
#define IRQ_WAITING GOT_YOU_MORON #define IRQ_WAITING GOT_YOU_MORON
#undef IRQ_DISABLED
#define IRQ_DISABLED GOT_YOU_MORON

4
kernel/irq/spurious.c
View File

@ -50,7 +50,7 @@ bool irq_wait_for_poll(struct irq_desc *desc)
raw_spin_lock(&desc->lock); raw_spin_lock(&desc->lock);
} while (desc->istate & IRQS_INPROGRESS); } while (desc->istate & IRQS_INPROGRESS);
/* Might have been disabled in meantime */ /* Might have been disabled in meantime */
return !(desc->status & IRQ_DISABLED) && desc->action; return !(desc->istate & IRQS_DISABLED) && desc->action;
#else #else
return false; return false;
#endif #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 * Do not poll disabled interrupts unless the spurious
* disabled poller asks explicitely. * disabled poller asks explicitely.
*/ */
if ((desc->status & IRQ_DISABLED) && !force) if ((desc->istate & IRQS_DISABLED) && !force)
goto out; goto out;
/* /*