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[PATCH] genirq: add chip->eoi(), fastack -> fasteoi

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Clean up the fastack concept by turning it into fasteoi and introducing the
->eoi() method for chips.

This also allows the cleanup of an i386 EOI quirk - now the quirk is
cleanly separated from the pure ACK implementation.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-06-29 02:25:03 -07:00 committed by Linus Torvalds
parent f702d7013c
commit 47c2a3aa44
2 changed files with 15 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/linux/irq.h
View File

@ -74,7 +74,8 @@ struct proc_dir_entry;
* @mask: mask an interrupt source
* @mask_ack: ack and mask an interrupt source
* @unmask: unmask an interrupt source
* @end: end of interrupt
* @eoi: end of interrupt - chip level
* @end: end of interrupt - flow level
* @set_affinity: set the CPU affinity on SMP machines
* @retrigger: resend an IRQ to the CPU
* @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
@ -94,6 +95,7 @@ struct irq_chip {
void (*mask)(unsigned int irq);
void (*mask_ack)(unsigned int irq);
void (*unmask)(unsigned int irq);
void (*eoi)(unsigned int irq);
void (*end)(unsigned int irq);
void (*set_affinity)(unsigned int irq, cpumask_t dest);
@ -287,7 +289,7 @@ extern int handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
extern void fastcall
handle_level_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);
extern void fastcall
handle_fastack_irq(unsigned int irq, struct irq_desc *desc,
handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc,
struct pt_regs *regs);
extern void fastcall
handle_edge_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);

25
kernel/irq/chip.c
View File

@ -280,18 +280,18 @@ out:
}
/**
* handle_fastack_irq - irq handler for transparent controllers
* handle_fasteoi_irq - irq handler for transparent controllers
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
* @regs: pointer to a register structure
*
* Only a single callback will be issued to the chip: an ->ack()
* Only a single callback will be issued to the chip: an ->eoi()
* call when the interrupt has been serviced. This enables support
* for modern forms of interrupt handlers, which handle the flow
* details in hardware, transparently.
*/
void fastcall
handle_fastack_irq(unsigned int irq, struct irq_desc *desc,
handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc,
struct pt_regs *regs)
{
unsigned int cpu = smp_processor_id();
@ -327,10 +327,7 @@ handle_fastack_irq(unsigned int irq, struct irq_desc *desc,
spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out:
if (!(desc->status & IRQ_DISABLED))
desc->chip->ack(irq);
else
desc->chip->mask(irq);
desc->chip->eoi(irq);
spin_unlock(&desc->lock);
}
@ -510,19 +507,19 @@ handle_irq_name(void fastcall (*handle)(unsigned int, struct irq_desc *,
struct pt_regs *))
{
if (handle == handle_level_irq)
return "level ";
if (handle == handle_fastack_irq)
return "level ";
return "level ";
if (handle == handle_fasteoi_irq)
return "fasteoi";
if (handle == handle_edge_irq)
return "edge ";
return "edge ";
if (handle == handle_simple_irq)
return "simple";
return "simple ";
#ifdef CONFIG_SMP
if (handle == handle_percpu_irq)
return "percpu";
return "percpu ";
#endif
if (handle == handle_bad_irq)
return "bad ";
return "bad ";
return NULL;
}