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#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 */

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;

        unsigned int irq;

        struct list_head list;

        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);

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 */