msi.h revision 1c8d7b0a562da06d3ebe83f01b1ed553205d1ae4 
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 */
13struct irq_desc;
14extern void mask_msi_irq(unsigned int irq);
15extern void unmask_msi_irq(unsigned int irq);
16extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
17extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
18extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
19extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
20
21struct msi_desc {
22	struct {
23		__u8	is_msix	: 1;
24		__u8	multiple: 3;	/* log2 number of messages */
25		__u8	maskbit	: 1; 	/* mask-pending bit supported ?   */
26		__u8	is_64	: 1;	/* Address size: 0=32bit 1=64bit  */
27		__u8	pos;	 	/* Location of the msi capability */
28		__u16	entry_nr;    	/* specific enabled entry 	  */
29		unsigned default_irq;	/* default pre-assigned irq	  */
30	} msi_attrib;
31
32	u32 masked;			/* mask bits */
33	unsigned int irq;
34	struct list_head list;
35
36	union {
37		void __iomem *mask_base;
38		u8 mask_pos;
39	};
40	struct pci_dev *dev;
41
42	/* Last set MSI message */
43	struct msi_msg msg;
44};
45
46/*
47 * The arch hook for setup up msi irqs
48 */
49int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
50void arch_teardown_msi_irq(unsigned int irq);
51extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
52extern void arch_teardown_msi_irqs(struct pci_dev *dev);
53extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
54
55
56#endif /* LINUX_MSI_H */
57