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/* Heper 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);
14
15extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
16
17struct msi_desc {
18 struct {
19 __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
20 __u8 maskbit : 1; /* mask-pending bit supported ? */
21 __u8 unused : 1;
22 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
23 __u8 pos; /* Location of the msi capability */
24 __u16 entry_nr; /* specific enabled entry */
25 unsigned default_irq; /* default pre-assigned irq */
26 }msi_attrib;
27
28 struct {
29 __u16 head;
30 __u16 tail;
31 }link;
32
33 void __iomem *mask_base;
34 struct pci_dev *dev;
35
36#ifdef CONFIG_PM
37 /* PM save area for MSIX address/data */
38 struct msi_msg msg_save;
39#endif
40};
41
42/*
43 * The arch hook for setup up msi irqs
44 */
45int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev);
46void arch_teardown_msi_irq(unsigned int irq);
47
48
49#endif /* LINUX_MSI_H */