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1 | #ifndef LINUX_MSI_H |
2 | #define LINUX_MSI_H |
3 | |
4 | #include <linux/list.h> |
5 | |
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 | |
12 | /* Helper functions */ |
13 | struct irq_desc; |
14 | extern void mask_msi_irq(unsigned int irq); |
15 | extern void unmask_msi_irq(unsigned int irq); |
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); |
18 | extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); |
19 | extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); |
20 | |
21 | struct msi_desc { |
22 | struct { |
23 | __u8 is_msix : 1; |
24 | __u8 multiple: 3; /* log2 number of messages */ |
25 | __u8 maskbit : 1; /* mask-pending bit supported ? */ |
26 | __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ |
27 | __u8 pos; /* Location of the msi capability */ |
28 | __u16 entry_nr; /* specific enabled entry */ |
29 | unsigned default_irq; /* default pre-assigned irq */ |
30 | } msi_attrib; |
31 | |
32 | u32 masked; /* mask bits */ |
33 | unsigned int irq; |
34 | struct list_head list; |
35 | |
36 | union { |
37 | void __iomem *mask_base; |
38 | u8 mask_pos; |
39 | }; |
40 | struct pci_dev *dev; |
41 | |
42 | /* Last set MSI message */ |
43 | struct msi_msg msg; |
44 | }; |
45 | |
46 | /* |
47 | * The arch hook for setup up msi irqs |
48 | */ |
49 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); |
50 | void arch_teardown_msi_irq(unsigned int irq); |
51 | extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
52 | extern void arch_teardown_msi_irqs(struct pci_dev *dev); |
53 | extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); |
54 | |
55 | |
56 | #endif /* LINUX_MSI_H */ |
57 |
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