From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- include/linux/msi.h | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 include/linux/msi.h (limited to 'include/linux/msi.h') diff --git a/include/linux/msi.h b/include/linux/msi.h new file mode 100644 index 00000000..05acced4 --- /dev/null +++ b/include/linux/msi.h @@ -0,0 +1,59 @@ +#ifndef LINUX_MSI_H +#define LINUX_MSI_H + +#include + +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 */ +}; + +/* Helper functions */ +struct irq_data; +struct msi_desc; +extern void mask_msi_irq(struct irq_data *data); +extern void unmask_msi_irq(struct irq_data *data); +extern void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); +extern void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); +extern void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); +extern void read_msi_msg(unsigned int irq, struct msi_msg *msg); +extern void get_cached_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 is_msix : 1; + __u8 multiple: 3; /* log2 number of messages */ + __u8 maskbit : 1; /* mask-pending bit supported ? */ + __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; + + u32 masked; /* mask bits */ + unsigned int irq; + struct list_head list; + + union { + void __iomem *mask_base; + u8 mask_pos; + }; + struct pci_dev *dev; + + /* Last set MSI message */ + struct msi_msg msg; +}; + +/* + * The arch hook for setup up msi irqs + */ +int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc); +void arch_teardown_msi_irq(unsigned int irq); +extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); +extern void arch_teardown_msi_irqs(struct pci_dev *dev); +extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); + + +#endif /* LINUX_MSI_H */ -- cgit v1.2.3