1#ifndef LINUX_MSI_H 2#define LINUX_MSI_H 3 4#include <linux/list.h> 5 6struct msi_msg { 7 u32 address_lo; /* low 32 bits of msi message address */ 8 u32 address_hi; /* high 32 bits of msi message address */ 9 u32 data; /* 16 bits of msi message data */ 10}; 11 12/* Helper functions */ 13struct irq_desc; 14extern void mask_msi_irq(unsigned int irq); 15extern void unmask_msi_irq(unsigned int irq); 16extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); 17extern void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); 18extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg); 19extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); 20extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); 21extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); 22 23struct msi_desc { 24 struct { 25 __u8 is_msix : 1; 26 __u8 multiple: 3; /* log2 number of messages */ 27 __u8 maskbit : 1; /* mask-pending bit supported ? */ 28 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ 29 __u8 pos; /* Location of the msi capability */ 30 __u16 entry_nr; /* specific enabled entry */ 31 unsigned default_irq; /* default pre-assigned irq */ 32 } msi_attrib; 33 34 u32 masked; /* mask bits */ 35 unsigned int irq; 36 struct list_head list; 37 38 union { 39 void __iomem *mask_base; 40 u8 mask_pos; 41 }; 42 struct pci_dev *dev; 43 44 /* Last set MSI message */ 45 struct msi_msg msg; 46}; 47 48/* 49 * The arch hook for setup up msi irqs 50 */ 51int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); 52void arch_teardown_msi_irq(unsigned int irq); 53extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 54extern void arch_teardown_msi_irqs(struct pci_dev *dev); 55extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); 56 57 58#endif /* LINUX_MSI_H */ 59