msi.h 1.2 KB

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  1. #ifndef LINUX_MSI_H
  2. #define LINUX_MSI_H
  3. struct msi_msg {
  4. u32 address_lo; /* low 32 bits of msi message address */
  5. u32 address_hi; /* high 32 bits of msi message address */
  6. u32 data; /* 16 bits of msi message data */
  7. };
  8. /* Helper functions */
  9. extern void mask_msi_irq(unsigned int irq);
  10. extern void unmask_msi_irq(unsigned int irq);
  11. extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
  12. extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
  13. struct msi_desc {
  14. struct {
  15. __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
  16. __u8 maskbit : 1; /* mask-pending bit supported ? */
  17. __u8 masked : 1;
  18. __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
  19. __u8 pos; /* Location of the msi capability */
  20. __u16 entry_nr; /* specific enabled entry */
  21. unsigned default_irq; /* default pre-assigned irq */
  22. }msi_attrib;
  23. struct {
  24. __u16 head;
  25. __u16 tail;
  26. }link;
  27. void __iomem *mask_base;
  28. struct pci_dev *dev;
  29. /* Last set MSI message */
  30. struct msi_msg msg;
  31. };
  32. /*
  33. * The arch hook for setup up msi irqs
  34. */
  35. int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
  36. void arch_teardown_msi_irq(unsigned int irq);
  37. #endif /* LINUX_MSI_H */