#ifndef LINUX_MSI_H #define LINUX_MSI_H #include <linux/list.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 */ struct irq_desc; extern void mask_msi_irq(unsigned int irq); extern void unmask_msi_irq(unsigned int irq); extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); 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 is_msix : 1; __u8 multiple: 3; /* log2 number of messages */ __u8 maskbit : 1; /* mask-pending bit supported ? */ __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; u32 masked; /* mask bits */ unsigned int irq; struct list_head list; union { void __iomem *mask_base; u8 mask_pos; }; 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); extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); extern void arch_teardown_msi_irqs(struct pci_dev *dev); extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); #endif /* LINUX_MSI_H */