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3b7d1921 EB |
1 | #ifndef LINUX_MSI_H |
2 | #define LINUX_MSI_H | |
3 | ||
b50cac55 | 4 | #include <linux/kobject.h> |
4aa9bc95 ME |
5 | #include <linux/list.h> |
6 | ||
3b7d1921 EB |
7 | struct msi_msg { |
8 | u32 address_lo; /* low 32 bits of msi message address */ | |
9 | u32 address_hi; /* high 32 bits of msi message address */ | |
10 | u32 data; /* 16 bits of msi message data */ | |
11 | }; | |
12 | ||
c54c1879 | 13 | /* Helper functions */ |
1c9db525 | 14 | struct irq_data; |
39431acb | 15 | struct msi_desc; |
2366d06e BH |
16 | void mask_msi_irq(struct irq_data *data); |
17 | void unmask_msi_irq(struct irq_data *data); | |
18 | void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); | |
19 | void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); | |
20 | void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); | |
21 | void read_msi_msg(unsigned int irq, struct msi_msg *msg); | |
22 | void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); | |
23 | void write_msi_msg(unsigned int irq, struct msi_msg *msg); | |
3b7d1921 EB |
24 | |
25 | struct msi_desc { | |
26 | struct { | |
24d27553 | 27 | __u8 is_msix : 1; |
1c8d7b0a | 28 | __u8 multiple: 3; /* log2 number of messages */ |
3b7d1921 | 29 | __u8 maskbit : 1; /* mask-pending bit supported ? */ |
3b7d1921 EB |
30 | __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ |
31 | __u8 pos; /* Location of the msi capability */ | |
32 | __u16 entry_nr; /* specific enabled entry */ | |
33 | unsigned default_irq; /* default pre-assigned irq */ | |
f2440d9a | 34 | } msi_attrib; |
3b7d1921 | 35 | |
f2440d9a | 36 | u32 masked; /* mask bits */ |
4aa9bc95 | 37 | unsigned int irq; |
65f6ae66 | 38 | unsigned int nvec_used; /* number of messages */ |
4aa9bc95 | 39 | struct list_head list; |
3b7d1921 | 40 | |
264d9caa MW |
41 | union { |
42 | void __iomem *mask_base; | |
43 | u8 mask_pos; | |
44 | }; | |
3b7d1921 EB |
45 | struct pci_dev *dev; |
46 | ||
392ee1e6 EB |
47 | /* Last set MSI message */ |
48 | struct msi_msg msg; | |
b50cac55 NH |
49 | |
50 | struct kobject kobj; | |
3b7d1921 EB |
51 | }; |
52 | ||
53 | /* | |
54 | * The arch hook for setup up msi irqs | |
55 | */ | |
f7feaca7 | 56 | int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); |
3b7d1921 | 57 | void arch_teardown_msi_irq(unsigned int irq); |
2366d06e BH |
58 | int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); |
59 | void arch_teardown_msi_irqs(struct pci_dev *dev); | |
60 | int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); | |
3b7d1921 EB |
61 | |
62 | #endif /* LINUX_MSI_H */ |