msi_bitmap.c File Reference

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/bitmap.h>
#include <asm/msi_bitmap.h>
#include <asm/setup.h>

Go to the source code of this file.

Functions
int	msi_bitmap_alloc_hwirqs (struct msi_bitmap *bmp, int num)
void	msi_bitmap_free_hwirqs (struct msi_bitmap *bmp, unsigned int offset, unsigned int num)
void	msi_bitmap_reserve_hwirq (struct msi_bitmap *bmp, unsigned int hwirq)
int	msi_bitmap_reserve_dt_hwirqs (struct msi_bitmap *bmp)
int	msi_bitmap_alloc (struct msi_bitmap *bmp, unsigned int irq_count, struct device_node *of_node)
void	msi_bitmap_free (struct msi_bitmap *bmp)

Function Documentation

int msi_bitmap_alloc	(	struct msi_bitmap *	bmp,
		unsigned int	irq_count,
		struct device_node *	of_node
	)

Definition at line 109 of file msi_bitmap.c.

int msi_bitmap_alloc_hwirqs	(	struct msi_bitmap *	bmp,
		int	num
	)

Definition at line 17 of file msi_bitmap.c.

void msi_bitmap_free

(

struct msi_bitmap *

bmp

)

Definition at line 134 of file msi_bitmap.c.

void msi_bitmap_free_hwirqs	(	struct msi_bitmap *	bmp,
		unsigned int	offset,
		unsigned int	num
	)

Definition at line 36 of file msi_bitmap.c.

int msi_bitmap_reserve_dt_hwirqs

(

struct msi_bitmap *

bmp

)

msi_bitmap_reserve_dt_hwirqs - Reserve irqs specified in the device tree. : pointer to the MSI bitmap.

Looks in the device tree to see if there is a property specifying which irqs can be used for MSI. If found those irqs reserved in the device tree are reserved in the bitmap.

Returns 0 for success, < 0 if there was an error, and > 0 if no property was found in the device tree.

Definition at line 72 of file msi_bitmap.c.

void msi_bitmap_reserve_hwirq	(	struct msi_bitmap *	bmp,
		unsigned int	hwirq
	)

Definition at line 50 of file msi_bitmap.c.