Commit | Line | Data |
---|---|---|
3b7d1921 EB |
1 | #ifndef LINUX_MSI_H |
2 | #define LINUX_MSI_H | |
3 | ||
4 | struct 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 | ||
c54c1879 | 10 | /* Helper functions */ |
3b7d1921 EB |
11 | extern void mask_msi_irq(unsigned int irq); |
12 | extern void unmask_msi_irq(unsigned int irq); | |
13 | extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); | |
3b7d1921 EB |
14 | extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); |
15 | ||
16 | struct 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 unused : 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 | #ifdef CONFIG_PM | |
36 | /* PM save area for MSIX address/data */ | |
37 | struct msi_msg msg_save; | |
38 | #endif | |
39 | }; | |
40 | ||
41 | /* | |
42 | * The arch hook for setup up msi irqs | |
43 | */ | |
f7feaca7 | 44 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); |
3b7d1921 EB |
45 | void arch_teardown_msi_irq(unsigned int irq); |
46 | ||
47 | ||
48 | #endif /* LINUX_MSI_H */ |