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3b7d1921 EB |
1 | #ifndef LINUX_MSI_H |
2 | #define LINUX_MSI_H | |
3 | ||
4aa9bc95 ME |
4 | #include <linux/list.h> |
5 | ||
3b7d1921 EB |
6 | struct 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 | ||
c54c1879 | 12 | /* Helper functions */ |
3145e941 | 13 | struct irq_desc; |
3b7d1921 EB |
14 | extern void mask_msi_irq(unsigned int irq); |
15 | extern void unmask_msi_irq(unsigned int irq); | |
3145e941 YL |
16 | extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); |
17 | extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); | |
3b7d1921 | 18 | extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); |
3b7d1921 EB |
19 | extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); |
20 | ||
21 | struct msi_desc { | |
22 | struct { | |
23 | __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */ | |
24 | __u8 maskbit : 1; /* mask-pending bit supported ? */ | |
392ee1e6 | 25 | __u8 masked : 1; |
3b7d1921 EB |
26 | __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ |
27 | __u8 pos; /* Location of the msi capability */ | |
8e149e09 | 28 | __u32 maskbits_mask; /* mask bits mask */ |
3b7d1921 EB |
29 | __u16 entry_nr; /* specific enabled entry */ |
30 | unsigned default_irq; /* default pre-assigned irq */ | |
31 | }msi_attrib; | |
32 | ||
4aa9bc95 ME |
33 | unsigned int irq; |
34 | struct list_head list; | |
3b7d1921 EB |
35 | |
36 | void __iomem *mask_base; | |
37 | struct pci_dev *dev; | |
38 | ||
392ee1e6 EB |
39 | /* Last set MSI message */ |
40 | struct msi_msg msg; | |
3b7d1921 EB |
41 | }; |
42 | ||
43 | /* | |
44 | * The arch hook for setup up msi irqs | |
45 | */ | |
f7feaca7 | 46 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); |
3b7d1921 | 47 | void arch_teardown_msi_irq(unsigned int irq); |
9c831334 | 48 | extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
032de8e2 | 49 | extern void arch_teardown_msi_irqs(struct pci_dev *dev); |
c9953a73 | 50 | extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); |
3b7d1921 EB |
51 | |
52 | ||
53 | #endif /* LINUX_MSI_H */ |