msi.h revision 2366d06eb15d3cf21d3b243ff586bcb80896c9f2 
1#ifndef LINUX_MSI_H
2#define LINUX_MSI_H
3
4#include <linux/kobject.h>
5#include <linux/list.h>
6
7struct msi_msg {
8	u32	address_lo;	/* low 32 bits of msi message address */
9	u32	address_hi;	/* high 32 bits of msi message address */
10	u32	data;		/* 16 bits of msi message data */
11};
12
13/* Helper functions */
14struct irq_data;
15struct msi_desc;
16void mask_msi_irq(struct irq_data *data);
17void unmask_msi_irq(struct irq_data *data);
18void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
19void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
20void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
21void read_msi_msg(unsigned int irq, struct msi_msg *msg);
22void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
23void write_msi_msg(unsigned int irq, struct msi_msg *msg);
24
25struct msi_desc {
26	struct {
27		__u8	is_msix	: 1;
28		__u8	multiple: 3;	/* log2 number of messages */
29		__u8	maskbit	: 1; 	/* mask-pending bit supported ?   */
30		__u8	is_64	: 1;	/* Address size: 0=32bit 1=64bit  */
31		__u8	pos;	 	/* Location of the msi capability */
32		__u16	entry_nr;    	/* specific enabled entry 	  */
33		unsigned default_irq;	/* default pre-assigned irq	  */
34	} msi_attrib;
35
36	u32 masked;			/* mask bits */
37	unsigned int irq;
38	struct list_head list;
39
40	union {
41		void __iomem *mask_base;
42		u8 mask_pos;
43	};
44	struct pci_dev *dev;
45
46	/* Last set MSI message */
47	struct msi_msg msg;
48
49	struct kobject kobj;
50};
51
52/*
53 * The arch hook for setup up msi irqs
54 */
55int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
56void arch_teardown_msi_irq(unsigned int irq);
57int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
58void arch_teardown_msi_irqs(struct pci_dev *dev);
59int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
60
61#endif /* LINUX_MSI_H */
62