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Eric W. Biederman3b7d1922006-10-04 02:16:59 -07001#ifndef LINUX_MSI_H
2#define LINUX_MSI_H
3
Michael Ellerman4aa9bc92007-04-05 17:19:10 +10004#include <linux/list.h>
5
Eric W. Biederman3b7d1922006-10-04 02:16:59 -07006struct 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
Satoru Takeuchic54c1872007-01-18 13:50:05 +090012/* Helper functions */
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070013extern 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);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070016extern 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 ? */
Eric W. Biederman392ee1e2007-03-08 13:04:57 -070022 __u8 masked : 1;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070023 __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
Michael Ellerman4aa9bc92007-04-05 17:19:10 +100029 unsigned int irq;
30 struct list_head list;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070031
32 void __iomem *mask_base;
33 struct pci_dev *dev;
34
Eric W. Biederman392ee1e2007-03-08 13:04:57 -070035 /* Last set MSI message */
36 struct msi_msg msg;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070037};
38
39/*
40 * The arch hook for setup up msi irqs
41 */
Eric W. Biedermanf7feaca2007-01-28 12:56:37 -070042int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070043void arch_teardown_msi_irq(unsigned int irq);
Michael Ellerman9c831332007-04-18 19:39:21 +100044extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
Michael Ellerman032de8e2007-04-18 19:39:22 +100045extern void arch_teardown_msi_irqs(struct pci_dev *dev);
Michael Ellermanc9953a72007-04-05 17:19:08 +100046extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -070047
48
49#endif /* LINUX_MSI_H */