Commit 38b6a1cf authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
Browse files

PCI/MSI: Move cached entry functions to irq core 



Required to support non PCI based MSI.

[ tglx: Extracted from Jiangs patch series ]

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent aeeb5965

drivers/pci/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/pci/msi.c

+0 −18
Original line number Diff line number Diff line
@@ -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) {

kernel/irq/msi.c

+13 −0
Original line number Diff line number Diff line
@@ -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