We do the minimum which is to "pass" interrupts to HAL, which
makes the console smoother and will allow us to implement
interrupt based completion and console.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
arch/powerpc/platforms/powernv/opal.c | 31 +++++++++++++++++++++++++++++++
1 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/opal.c
b/arch/powerpc/platforms/powernv/opal.c
index 7887733..5a598ca 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <linux/interrupt.h>
#include <asm/opal.h>
#include <asm/firmware.h>
@@ -135,9 +136,22 @@ int opal_put_chars(uint32_t vtermno, const char *data, int
total_len)
return written;
}
+static irqreturn_t opal_interrupt(int irq, void *data)
+{
+ uint64_t events;
+
+ opal_handle_interrupt(virq_to_hw(irq), &events);
+
+ /* XXX TODO: Do something with the events */
+
+ return IRQ_HANDLED;
+}
+
static int __init opal_init(void)
{
struct device_node *np, *consoles;
+ const u32 *irqs;
+ int rc, i, irqlen;
opal_node = of_find_node_by_path("/ibm,opal");
if (!opal_node) {
@@ -156,6 +170,23 @@ static int __init opal_init(void)
of_platform_device_create(np, NULL, NULL);
}
of_node_put(consoles);
+
+ /* Find all OPAL interrupts and request them */
+ irqs = of_get_property(opal_node, "opal-interrupts", &irqlen);
+ pr_debug("opal: Found %d interrupts reserved for OPAL\n",
+ irqs ? (irqlen / 4) : 0);
+ for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) {
+ unsigned int hwirq = be32_to_cpup(irqs);
+ unsigned int irq = irq_create_mapping(NULL, hwirq);
+ if (irq == NO_IRQ) {
+ pr_warning("opal: Failed to map irq 0x%x\n", hwirq);
+ continue;
+ }
+ rc = request_irq(irq, opal_interrupt, 0, "opal", NULL);
+ if (rc)
+ pr_warning("opal: Error %d requesting irq %d"
+ " (0x%x)\n", rc, irq, hwirq);
+ }
return 0;
}
subsys_initcall(opal_init);
--
1.7.4.1
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