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PCI/MSI: Move cached entry functions to irq core

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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>
This commit is contained in:
Jiang Liu 2014-11-12 12:11:25 +01:00 committed by Thomas Gleixner
parent aeeb59657c
commit 38b6a1cf3e
3 changed files with 14 additions and 18 deletions
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1
drivers/pci/Kconfig
View file

@ -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

18
drivers/pci/msi.c
View file

@ -290,24 +290,6 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *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 __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
{
if (entry->dev->current_state != PCI_D0) {

13
kernel/irq/msi.c
View file

@ -18,6 +18,19 @@
/* Temparory solution for building, will be removed later */
#include <linux/pci.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
/**
* msi_domain_set_affinity - Generic affinity setter function for MSI domains