1 #ifndef LINUX_MSI_H 2 #define LINUX_MSI_H 3 4 #include <linux/kobject.h> 5 #include <linux/list.h> 6 7 struct msi_msg { 8 u32 address_lo; /* low 32 bits of msi message address */ 9 u32 address_hi; /* high 32 bits of msi message address */ 10 u32 data; /* 16 bits of msi message data */ 11 }; 12 13 /* Helper functions */ 14 struct irq_data; 15 struct msi_desc; 16 extern void mask_msi_irq(struct irq_data *data); 17 extern void unmask_msi_irq(struct irq_data *data); 18 extern void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); 19 extern void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); 20 extern void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); 21 extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); 22 extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); 23 extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); 24 25 struct msi_desc { 26 struct { 27 __u8 is_msix : 1; 28 __u8 multiple: 3; /* log2 number of messages */ 29 __u8 maskbit : 1; /* mask-pending bit supported ? */ 30 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ 31 __u8 pos; /* Location of the msi capability */ 32 __u16 entry_nr; /* specific enabled entry */ 33 unsigned default_irq; /* default pre-assigned irq */ 34 } msi_attrib; 35 36 u32 masked; /* mask bits */ 37 unsigned int irq; 38 struct list_head list; 39 40 union { 41 void __iomem *mask_base; 42 u8 mask_pos; 43 }; 44 struct pci_dev *dev; 45 46 /* Last set MSI message */ 47 struct msi_msg msg; 48 49 struct kobject kobj; 50 }; 51 52 /* 53 * The arch hook for setup up msi irqs 54 */ 55 int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); 56 void arch_teardown_msi_irq(unsigned int irq); 57 extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 58 extern void arch_teardown_msi_irqs(struct pci_dev *dev); 59 extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); 60 61 62 #endif /* LINUX_MSI_H */ 63