1 #ifndef LINUX_MSI_H 2 #define LINUX_MSI_H 3 4 struct msi_msg { 5 u32 address_lo; /* low 32 bits of msi message address */ 6 u32 address_hi; /* high 32 bits of msi message address */ 7 u32 data; /* 16 bits of msi message data */ 8 }; 9 10 /* Heper functions */ 11 extern void mask_msi_irq(unsigned int irq); 12 extern void unmask_msi_irq(unsigned int irq); 13 extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); 14 15 extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); 16 17 struct msi_desc { 18 struct { 19 __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */ 20 __u8 maskbit : 1; /* mask-pending bit supported ? */ 21 __u8 unused : 1; 22 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ 23 __u8 pos; /* Location of the msi capability */ 24 __u16 entry_nr; /* specific enabled entry */ 25 unsigned default_irq; /* default pre-assigned irq */ 26 }msi_attrib; 27 28 struct { 29 __u16 head; 30 __u16 tail; 31 }link; 32 33 void __iomem *mask_base; 34 struct pci_dev *dev; 35 36 #ifdef CONFIG_PM 37 /* PM save area for MSIX address/data */ 38 struct msi_msg msg_save; 39 #endif 40 }; 41 42 /* 43 * The arch hook for setup up msi irqs 44 */ 45 int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev); 46 void arch_teardown_msi_irq(unsigned int irq); 47 48 49 #endif /* LINUX_MSI_H */ 50