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Subject[patch 10/16] PCI/MSI: Move cached entry functions to irq core
From: Jiang Liu <jiang.liu@linux.intel.com>

Required to support non PCI based MSI.

[ tglx: Extracted from Jiangs patch series ]

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/pci/Kconfig | 1 +
drivers/pci/msi.c | 18 ------------------
kernel/irq/msi.c | 13 +++++++++++++
3 files changed, 14 insertions(+), 18 deletions(-)

Index: tip/drivers/pci/Kconfig
===================================================================
--- tip.orig/drivers/pci/Kconfig
+++ tip/drivers/pci/Kconfig
@@ -4,6 +4,7 @@
config PCI_MSI
bool "Message Signaled Interrupts (MSI and MSI-X)"
depends on PCI
+ select GENERIC_MSI_IRQ
help
This allows device drivers to enable MSI (Message Signaled
Interrupts). Message Signaled Interrupts enable a device to
Index: tip/drivers/pci/msi.c
===================================================================
--- tip.orig/drivers/pci/msi.c
+++ tip/drivers/pci/msi.c
@@ -286,24 +286,6 @@ void read_msi_msg(unsigned int irq, stru
__read_msi_msg(entry, msg);
}

-void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
-{
- /* Assert that the cache is valid, assuming that
- * valid messages are not all-zeroes. */
- BUG_ON(!(entry->msg.address_hi | entry->msg.address_lo |
- entry->msg.data));
-
- *msg = entry->msg;
-}
-
-void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg)
-{
- struct msi_desc *entry = irq_get_msi_desc(irq);
-
- __get_cached_msi_msg(entry, msg);
-}
-EXPORT_SYMBOL_GPL(get_cached_msi_msg);
-
void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
{
if (entry->dev->current_state != PCI_D0) {
Index: tip/kernel/irq/msi.c
===================================================================
--- tip.orig/kernel/irq/msi.c
+++ tip/kernel/irq/msi.c
@@ -13,6 +13,19 @@
#include <linux/irqdomain.h>
#include <linux/msi.h>

+void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
+{
+ *msg = entry->msg;
+}
+
+void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg)
+{
+ struct msi_desc *entry = irq_get_msi_desc(irq);
+
+ __get_cached_msi_msg(entry, msg);
+}
+EXPORT_SYMBOL_GPL(get_cached_msi_msg);
+
#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
int msi_domain_set_affinity(struct irq_data *irq_data,
const struct cpumask *mask, bool force)



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