1#ifndef LINUX_MSI_H
2#define LINUX_MSI_H
3
4#include <linux/list.h>
5
6struct msi_msg {
7	u32	address_lo;	/* low 32 bits of msi message address */
8	u32	address_hi;	/* high 32 bits of msi message address */
9	u32	data;		/* 16 bits of msi message data */
10};
11
12/* Helper functions */
13extern void mask_msi_irq(unsigned int irq);
14extern void unmask_msi_irq(unsigned int irq);
15extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
16extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
17
18struct msi_desc {
19	struct {
20		__u8	type	: 5; 	/* {0: unused, 5h:MSI, 11h:MSI-X} */
21		__u8	maskbit	: 1; 	/* mask-pending bit supported ?   */
22		__u8	masked	: 1;
23		__u8	is_64	: 1;	/* Address size: 0=32bit 1=64bit  */
24		__u8	pos;	 	/* Location of the msi capability */
25		__u16	entry_nr;    	/* specific enabled entry 	  */
26		unsigned default_irq;	/* default pre-assigned irq	  */
27	}msi_attrib;
28
29	unsigned int irq;
30	struct list_head list;
31
32	void __iomem *mask_base;
33	struct pci_dev *dev;
34
35	/* Last set MSI message */
36	struct msi_msg msg;
37};
38
39/*
40 * The arch hook for setup up msi irqs
41 */
42int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
43void arch_teardown_msi_irq(unsigned int irq);
44extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
45extern void arch_teardown_msi_irqs(struct pci_dev *dev);
46extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
47
48
49#endif /* LINUX_MSI_H */
50