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genirq: Expand generic show_interrupts()

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Some archs want to print extra information for certain irq_chips which
is per irq and not per chip. Allow them to provide a chip callback to
print the chip name and the extra information.

PowerPC wants to print the LEVEL/EDGE type information. Make it configurable.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2011-03-25 16:48:50 +01:00
parent 08f1b80735
commit ab7798ffcf
3 changed files with 22 additions and 1 deletions
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4
include/linux/irq.h
View File

@ -28,6 +28,7 @@
#include <asm/ptrace.h>
#include <asm/irq_regs.h>
struct seq_file;
struct irq_desc;
struct irq_data;
typedef void (*irq_flow_handler_t)(unsigned int irq,
@ -270,6 +271,7 @@ static inline bool irqd_can_move_in_process_context(struct irq_data *d)
* @irq_set_wake: enable/disable power-management wake-on of an IRQ
* @irq_bus_lock: function to lock access to slow bus (i2c) chips
* @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
* @irq_print_chip: optional to print special chip info in show_interrupts
* @flags: chip specific flags
*
* @release: release function solely used by UML
@ -317,6 +319,8 @@ struct irq_chip {
void (*irq_bus_lock)(struct irq_data *data);
void (*irq_bus_sync_unlock)(struct irq_data *data);
void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
unsigned long flags;
/* Currently used only by UML, might disappear one day.*/

4
kernel/irq/Kconfig
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@ -31,6 +31,10 @@ config GENERIC_IRQ_PROBE
config GENERIC_IRQ_SHOW
bool
# Print level/edge extra information
config GENERIC_IRQ_SHOW_LEVEL
bool
# Support for delayed migration from interrupt context
config GENERIC_PENDING_IRQ
bool

13
kernel/irq/proc.c
View File

@ -404,7 +404,20 @@ int show_interrupts(struct seq_file *p, void *v)
seq_printf(p, "%*d: ", prec, i);
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
if (desc->irq_data.chip) {
if (desc->irq_data.chip->irq_print_chip)
desc->irq_data.chip->irq_print_chip(&desc->irq_data, p);
else if (desc->irq_data.chip->name)
seq_printf(p, " %8s", desc->irq_data.chip->name);
else
seq_printf(p, " %8s", "-");
} else {
seq_printf(p, " %8s", "None");
}
#ifdef CONFIG_GENIRC_IRQ_SHOW_LEVEL
seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
#endif
if (desc->name)
seq_printf(p, "-%-8s", desc->name);