Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 __u32 maskbits_mask; /* mask bits mask */
26 __u16 entry_nr; /* specific enabled entry */
27 unsigned default_irq; /* default pre-assigned irq */
28 }msi_attrib;
29
30 unsigned int irq;
31 struct list_head list;
32
33 void __iomem *mask_base;
34 struct pci_dev *dev;
35
36 /* Last set MSI message */
37 struct msi_msg msg;
38};
39
40/*
41 * The arch hook for setup up msi irqs
42 */
43int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
44void arch_teardown_msi_irq(unsigned int irq);
45extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
46extern void arch_teardown_msi_irqs(struct pci_dev *dev);
47extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
48
49
50#endif /* LINUX_MSI_H */