Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef LINUX_MSI_H
2#define LINUX_MSI_H
3
4#include <linux/kobject.h>
5#include <linux/list.h>
6
7struct 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 */
14struct irq_data;
15struct msi_desc;
16extern void mask_msi_irq(struct irq_data *data);
17extern void unmask_msi_irq(struct irq_data *data);
18extern void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
19extern void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
20extern void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
21extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
22extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
23extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
24
25struct 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 */
55int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
56void arch_teardown_msi_irq(unsigned int irq);
57extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
58extern void arch_teardown_msi_irqs(struct pci_dev *dev);
59extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
60
61
62#endif /* LINUX_MSI_H */