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- #ifndef LINUX_MSI_H
- #define LINUX_MSI_H
- #include <linux/kobject.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_data;
- struct msi_desc;
- void mask_msi_irq(struct irq_data *data);
- void unmask_msi_irq(struct irq_data *data);
- void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
- void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
- void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
- void read_msi_msg(unsigned int irq, struct msi_msg *msg);
- void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
- 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;
- unsigned int nvec_used; /* number of messages */
- struct list_head list;
- union {
- void __iomem *mask_base;
- u8 mask_pos;
- };
- struct pci_dev *dev;
- /* Last set MSI message */
- struct msi_msg msg;
- struct kobject kobj;
- };
- /*
- * 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);
- int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
- void arch_teardown_msi_irqs(struct pci_dev *dev);
- int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
- #endif /* LINUX_MSI_H */
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