projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3b7d1921 EB |
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 */ |