powernv/opal-dump: Convert to irq domain

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>

diff --git a/arch/powerpc/platforms/powernv/opal-dump.c b/arch/powerpc/platforms/powernv/opal-dump.c
index 5aa9c1ce4de3eabd8476211d7323622dd7c60254..2ee96431f7360e1d8d63ece45520416860c62428 100644 (file)
--- a/arch/powerpc/platforms/powernv/opal-dump.c
+++ b/arch/powerpc/platforms/powernv/opal-dump.c
@@ -15,6 +15,7 @@
 #include <linux/vmalloc.h>
 #include <linux/pagemap.h>
 #include <linux/delay.h>
+#include <linux/interrupt.h>
 
 #include <asm/opal.h>
 
@@ -60,7 +61,7 @@ static ssize_t dump_type_show(struct dump_obj *dump_obj,
                              struct dump_attribute *attr,
                              char *buf)
 {
-       
+
        return sprintf(buf, "0x%x %s\n", 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;
 }
 
-static int process_dump(void)
+static irqreturn_t process_dump(int irq, void *data)
 {
        int rc;
        uint32_t dump_id, dump_size, dump_type;
@@ -387,45 +388,13 @@ static int process_dump(void)
        if (!dump)
                return -1;
 
-       return 0;
-}
-
-static void dump_work_fn(struct work_struct *work)
-{
-       process_dump();
+       return IRQ_HANDLED;
 }
 
-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)
 {
        int rc;
+       int dump_irq;
 
        /* ELOG not supported by firmware */
        if (!opal_check_token(OPAL_DUMP_READ))
@@ -445,10 +414,19 @@ void __init opal_platform_dump_init(void)
                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) {
-               pr_warn("%s: Can't register OPAL event notifier (%d)\n",
-                       __func__, rc);
+               pr_err("%s: Can't request OPAL event irq (%d)\n",
+                      __func__, rc);
                return;
        }