diff options
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h new file mode 100644 index 000000000000..c7ef94343673 --- /dev/null +++ b/include/linux/msi.h @@ -0,0 +1,49 @@ +#ifndef LINUX_MSI_H +#define LINUX_MSI_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 */ +}; + +/* Heper functions */ +extern void mask_msi_irq(unsigned int irq); +extern void unmask_msi_irq(unsigned int irq); +extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); + +extern void write_msi_msg(unsigned int irq, struct msi_msg *msg); + +struct msi_desc { + struct { + __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */ + __u8 maskbit : 1; /* mask-pending bit supported ? */ + __u8 unused : 1; + __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; + + struct { + __u16 head; + __u16 tail; + }link; + + void __iomem *mask_base; + struct pci_dev *dev; + +#ifdef CONFIG_PM + /* PM save area for MSIX address/data */ + struct msi_msg msg_save; +#endif +}; + +/* + * The arch hook for setup up msi irqs + */ +int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev); +void arch_teardown_msi_irq(unsigned int irq); + + +#endif /* LINUX_MSI_H */ |