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powernv/opal-dump: Convert to irq domain

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Convert the opal dump driver to the new opal irq domain.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Alistair Popple 2015-05-15 14:06:43 +10:00 committed by Michael Ellerman
parent 74159a7028
commit 8034f715f0
1 changed files with 17 additions and 39 deletions
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56
arch/powerpc/platforms/powernv/opal-dump.c
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@ -15,6 +15,7 @@
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/interrupt.h>
#include <asm/opal.h> #include <asm/opal.h>
@ -60,7 +61,7 @@ static ssize_t dump_type_show(struct dump_obj *dump_obj,
struct dump_attribute *attr, struct dump_attribute *attr,
char *buf) char *buf)
{ {
return sprintf(buf, "0x%x %s\n", dump_obj->type, return sprintf(buf, "0x%x %s\n", dump_obj->type,
dump_type_to_string(dump_obj->type)); dump_type_to_string(dump_obj->type));
} }
@ -363,7 +364,7 @@ static struct dump_obj *create_dump_obj(uint32_t id, size_t size,
return dump; return dump;
} }
static int process_dump(void) static irqreturn_t process_dump(int irq, void *data)
{ {
int rc; int rc;
uint32_t dump_id, dump_size, dump_type; uint32_t dump_id, dump_size, dump_type;
@ -387,45 +388,13 @@ static int process_dump(void)
if (!dump) if (!dump)
return -1; return -1;
return 0; return IRQ_HANDLED;
} }
static void dump_work_fn(struct work_struct *work)
{
process_dump();
}
static DECLARE_WORK(dump_work, dump_work_fn);
static void schedule_process_dump(void)
{
schedule_work(&dump_work);
}
/*
* New dump available notification
*
* Once we get notification, we add sysfs entries for it.
* We only fetch the dump on demand, and create sysfs asynchronously.
*/
static int dump_event(struct notifier_block *nb,
unsigned long events, void *change)
{
if (events & OPAL_EVENT_DUMP_AVAIL)
schedule_process_dump();
return 0;
}
static struct notifier_block dump_nb = {
.notifier_call = dump_event,
.next = NULL,
.priority = 0
};
void __init opal_platform_dump_init(void) void __init opal_platform_dump_init(void)
{ {
int rc; int rc;
int dump_irq;
/* ELOG not supported by firmware */ /* ELOG not supported by firmware */
if (!opal_check_token(OPAL_DUMP_READ)) if (!opal_check_token(OPAL_DUMP_READ))
@ -445,10 +414,19 @@ void __init opal_platform_dump_init(void)
return; return;
} }
rc = opal_notifier_register(&dump_nb); dump_irq = opal_event_request(ilog2(OPAL_EVENT_DUMP_AVAIL));
if (!dump_irq) {
pr_err("%s: Can't register OPAL event irq (%d)\n",
__func__, dump_irq);
return;
}
rc = request_threaded_irq(dump_irq, NULL, process_dump,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"opal-dump", NULL);
if (rc) { if (rc) {
pr_warn("%s: Can't register OPAL event notifier (%d)\n", pr_err("%s: Can't request OPAL event irq (%d)\n",
__func__, rc); __func__, rc);
return; return;
} }