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