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
4struct msi_msg {
5 u32 address_lo; /* low 32 bits of msi message address */
6 u32 address_hi; /* high 32 bits of msi message address */
7 u32 data; /* 16 bits of msi message data */
8};
9
10/* Helper functions */
11extern void mask_msi_irq(unsigned int irq);
12extern void unmask_msi_irq(unsigned int irq);
13extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
14extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
15
16struct msi_desc {
17 struct {
18 __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
19 __u8 maskbit : 1; /* mask-pending bit supported ? */
20 __u8 masked : 1;
21 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
22 __u8 pos; /* Location of the msi capability */
23 __u16 entry_nr; /* specific enabled entry */
24 unsigned default_irq; /* default pre-assigned irq */
25 }msi_attrib;
26
27 struct {
28 __u16 head;
29 __u16 tail;
30 }link;
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);
44
45
46#endif /* LINUX_MSI_H */