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- #ifndef LINUX_MSI_H
- #define LINUX_MSI_H
- struct msi_msg {
- u32 address_lo; /* low 32 bits of msi message address */
- u32 address_hi; /* high 32 bits of msi message address */
- u32 data; /* 16 bits of msi message data */
- };
- /* Helper functions */
- extern void mask_msi_irq(unsigned int irq);
- extern void unmask_msi_irq(unsigned int irq);
- extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
- extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
- struct msi_desc {
- struct {
- __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
- __u8 maskbit : 1; /* mask-pending bit supported ? */
- __u8 masked : 1;
- __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
- __u8 pos; /* Location of the msi capability */
- __u16 entry_nr; /* specific enabled entry */
- unsigned default_irq; /* default pre-assigned irq */
- }msi_attrib;
- struct {
- __u16 head;
- __u16 tail;
- }link;
- void __iomem *mask_base;
- struct pci_dev *dev;
- /* Last set MSI message */
- struct msi_msg msg;
- };
- /*
- * The arch hook for setup up msi irqs
- */
- int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
- void arch_teardown_msi_irq(unsigned int irq);
- #endif /* LINUX_MSI_H */
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