[PATCH v2] powerpc/pseries: Make request_ras_irqs() available to other pseries code

[Mark Nelson <markn@au1.ibm.com>]

At the moment only the RAS code uses event-sources interrupts (for EPOW
events and internal errors) so request_ras_irqs() (which actually requests
the event-sources interrupts) is found in ras.c and is static.

We want to be able to use event-sources interrupts in other pseries code,
so let's rename request_ras_irqs() to request_event_sources_irqs() and
move it to event_sources.c.

This will be used in an upcoming patch that adds support for IO Event
interrupts that come through as event sources.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
---

Changes v1 -> v2:
 * move the prototype for request_event_sources_irqs() to pseries.h

 arch/powerpc/platforms/pseries/Makefile        |    2 
 arch/powerpc/platforms/pseries/event_sources.c |   79 +++++++++++++++++++++++++
 arch/powerpc/platforms/pseries/pseries.h       |    7 ++
 arch/powerpc/platforms/pseries/ras.c           |   62 -------------------
 4 files changed, 90 insertions(+), 60 deletions(-)

Index: upstream/arch/powerpc/platforms/pseries/event_sources.c
===================================================================
--- /dev/null
+++ upstream/arch/powerpc/platforms/pseries/event_sources.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2001 Dave Engebretsen IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <asm/prom.h>
+
+#include "pseries.h"
+
+void request_event_sources_irqs(struct device_node *np,
+				irq_handler_t handler,
+				const char *name)
+{
+	int i, index, count = 0;
+	struct of_irq oirq;
+	const u32 *opicprop;
+	unsigned int opicplen;
+	unsigned int virqs[16];
+
+	/* Check for obsolete "open-pic-interrupt" property. If present, then
+	 * map those interrupts using the default interrupt host and default
+	 * trigger
+	 */
+	opicprop = of_get_property(np, "open-pic-interrupt", &opicplen);
+	if (opicprop) {
+		opicplen /= sizeof(u32);
+		for (i = 0; i < opicplen; i++) {
+			if (count > 15)
+				break;
+			virqs[count] = irq_create_mapping(NULL, *(opicprop++));
+			if (virqs[count] == NO_IRQ)
+				printk(KERN_ERR "Unable to allocate interrupt "
+				       "number for %s\n", np->full_name);
+			else
+				count++;
+
+		}
+	}
+	/* Else use normal interrupt tree parsing */
+	else {
+		/* First try to do a proper OF tree parsing */
+		for (index = 0; of_irq_map_one(np, index, &oirq) == 0;
+		     index++) {
+			if (count > 15)
+				break;
+			virqs[count] = irq_create_of_mapping(oirq.controller,
+							    oirq.specifier,
+							    oirq.size);
+			if (virqs[count] == NO_IRQ)
+				printk(KERN_ERR "Unable to allocate interrupt "
+				       "number for %s\n", np->full_name);
+			else
+				count++;
+		}
+	}
+
+	/* Now request them */
+	for (i = 0; i < count; i++) {
+		if (request_irq(virqs[i], handler, 0, name, NULL)) {
+			printk(KERN_ERR "Unable to request interrupt %d for "
+			       "%s\n", virqs[i], np->full_name);
+			return;
+		}
+	}
+}
+
Index: upstream/arch/powerpc/platforms/pseries/Makefile
===================================================================
--- upstream.orig/arch/powerpc/platforms/pseries/Makefile
+++ upstream/arch/powerpc/platforms/pseries/Makefile
@@ -7,7 +7,7 @@ EXTRA_CFLAGS		+= -DDEBUG
 endif
 
 obj-y			:= lpar.o hvCall.o nvram.o reconfig.o \
-			   setup.o iommu.o ras.o \
+			   setup.o iommu.o event_sources.o ras.o \
 			   firmware.o power.o dlpar.o
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_XICS)	+= xics.o
Index: upstream/arch/powerpc/platforms/pseries/pseries.h
===================================================================
--- upstream.orig/arch/powerpc/platforms/pseries/pseries.h
+++ upstream/arch/powerpc/platforms/pseries/pseries.h
@@ -10,6 +10,13 @@
 #ifndef _PSERIES_PSERIES_H
 #define _PSERIES_PSERIES_H
 
+#include <linux/interrupt.h>
+
+struct device_node;
+
+extern void request_event_sources_irqs(struct device_node *np,
+				       irq_handler_t handler, const char *name);
+
 extern void __init fw_feature_init(const char *hypertas, unsigned long len);
 
 struct pt_regs;
Index: upstream/arch/powerpc/platforms/pseries/ras.c
===================================================================
--- upstream.orig/arch/powerpc/platforms/pseries/ras.c
+++ upstream/arch/powerpc/platforms/pseries/ras.c
@@ -67,63 +67,6 @@ static irqreturn_t ras_epow_interrupt(in
 static irqreturn_t ras_error_interrupt(int irq, void *dev_id);
 
 
-static void request_ras_irqs(struct device_node *np,
-			irq_handler_t handler,
-			const char *name)
-{
-	int i, index, count = 0;
-	struct of_irq oirq;
-	const u32 *opicprop;
-	unsigned int opicplen;
-	unsigned int virqs[16];
-
-	/* Check for obsolete "open-pic-interrupt" property. If present, then
-	 * map those interrupts using the default interrupt host and default
-	 * trigger
-	 */
-	opicprop = of_get_property(np, "open-pic-interrupt", &opicplen);
-	if (opicprop) {
-		opicplen /= sizeof(u32);
-		for (i = 0; i < opicplen; i++) {
-			if (count > 15)
-				break;
-			virqs[count] = irq_create_mapping(NULL, *(opicprop++));
-			if (virqs[count] == NO_IRQ)
-				printk(KERN_ERR "Unable to allocate interrupt "
-				       "number for %s\n", np->full_name);
-			else
-				count++;
-
-		}
-	}
-	/* Else use normal interrupt tree parsing */
-	else {
-		/* First try to do a proper OF tree parsing */
-		for (index = 0; of_irq_map_one(np, index, &oirq) == 0;
-		     index++) {
-			if (count > 15)
-				break;
-			virqs[count] = irq_create_of_mapping(oirq.controller,
-							    oirq.specifier,
-							    oirq.size);
-			if (virqs[count] == NO_IRQ)
-				printk(KERN_ERR "Unable to allocate interrupt "
-				       "number for %s\n", np->full_name);
-			else
-				count++;
-		}
-	}
-
-	/* Now request them */
-	for (i = 0; i < count; i++) {
-		if (request_irq(virqs[i], handler, 0, name, NULL)) {
-			printk(KERN_ERR "Unable to request interrupt %d for "
-			       "%s\n", virqs[i], np->full_name);
-			return;
-		}
-	}
-}
-
 /*
  * Initialize handlers for the set of interrupts caused by hardware errors
  * and power system events.
@@ -138,14 +81,15 @@ static int __init init_ras_IRQ(void)
 	/* Internal Errors */
 	np = of_find_node_by_path("/event-sources/internal-errors");
 	if (np != NULL) {
-		request_ras_irqs(np, ras_error_interrupt, "RAS_ERROR");
+		request_event_sources_irqs(np, ras_error_interrupt,
+					   "RAS_ERROR");
 		of_node_put(np);
 	}
 
 	/* EPOW Events */
 	np = of_find_node_by_path("/event-sources/epow-events");
 	if (np != NULL) {
-		request_ras_irqs(np, ras_epow_interrupt, "RAS_EPOW");
+		request_event_sources_irqs(np, ras_epow_interrupt, "RAS_EPOW");
 		of_node_put(np);
 	}