1 #ifndef LINUX_MSI_H 2 #define LINUX_MSI_H 3 4 #include <linux/list.h> 5 6 struct 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 */ 13 extern void mask_msi_irq(unsigned int irq); 14 extern void unmask_msi_irq(unsigned int irq); 15 extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); 16 extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); 17 18 struct msi_desc { 19 struct { 20 __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */ 21 __u8 maskbit : 1; /* mask-pending bit supported ? */ 22 __u8 masked : 1; 23 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ 24 __u8 pos; /* Location of the msi capability */ 25 __u16 entry_nr; /* specific enabled entry */ 26 unsigned default_irq; /* default pre-assigned irq */ 27 }msi_attrib; 28 29 unsigned int irq; 30 struct list_head list; 31 32 void __iomem *mask_base; 33 struct pci_dev *dev; 34 35 /* Last set MSI message */ 36 struct msi_msg msg; 37 }; 38 39 /* 40 * The arch hook for setup up msi irqs 41 */ 42 int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); 43 void arch_teardown_msi_irq(unsigned int irq); 44 extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 45 extern void arch_teardown_msi_irqs(struct pci_dev *dev); 46 extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); 47 48 49 #endif /* LINUX_MSI_H */ 50