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gerrit-public.fairphone.software / kernel / msm-4.9 / c55177e3e1e8a89d9d810d95ac18cb104865322c / . / include / linux / msi.h
blob: ce93a341337d48a78b5449ea249aac04c3f8284d [file] [log] [blame]
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]1#ifndef LINUX_MSI_H
2#define LINUX_MSI_H
3
Neil Hormanb50cac52011-10-06 14:08:18 -0400[diff] [blame]4#include <linux/kobject.h>
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]5#include <linux/list.h>
6
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]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
Satoru Takeuchic54c1872007-01-18 13:50:05 +0900[diff] [blame]13/* Helper functions */
Thomas Gleixner1c9db522010-09-28 16:46:51 +0200[diff] [blame]14struct irq_data;
Thomas Gleixner39431ac2010-09-28 19:09:51 +0200[diff] [blame]15struct msi_desc;
Thomas Gleixner1c9db522010-09-28 16:46:51 +0200[diff] [blame]16extern void mask_msi_irq(struct irq_data *data);
17extern void unmask_msi_irq(struct irq_data *data);
Thomas Gleixner39431ac2010-09-28 19:09:51 +0200[diff] [blame]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);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]21extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
Ben Hutchings30da5522010-07-23 14:56:28 +0100[diff] [blame]22extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]23extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
24
25struct msi_desc {
26 struct {
Matthew Wilcox24d27552009-03-17 08:54:06 -0400[diff] [blame]27 __u8 is_msix : 1;
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400[diff] [blame]28 __u8 multiple: 3; /* log2 number of messages */
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]29 __u8 maskbit : 1; /* mask-pending bit supported ? */
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]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 */
Matthew Wilcoxf2440d92009-03-17 08:54:09 -0400[diff] [blame]34 } msi_attrib;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]35
Matthew Wilcoxf2440d92009-03-17 08:54:09 -0400[diff] [blame]36 u32 masked; /* mask bits */
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]37 unsigned int irq;
38 struct list_head list;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]39
Matthew Wilcox264d9ca2009-03-17 08:54:08 -0400[diff] [blame]40 union {
41 void __iomem *mask_base;
42 u8 mask_pos;
43 };
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]44 struct pci_dev *dev;
45
Eric W. Biederman392ee1e2007-03-08 13:04:57 -0700[diff] [blame]46 /* Last set MSI message */
47 struct msi_msg msg;
Neil Hormanb50cac52011-10-06 14:08:18 -0400[diff] [blame]48
49 struct kobject kobj;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]50};
51
52/*
53 * The arch hook for setup up msi irqs
54 */
Eric W. Biedermanf7feaca2007-01-28 12:56:37 -0700[diff] [blame]55int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]56void arch_teardown_msi_irq(unsigned int irq);
Michael Ellerman9c831332007-04-18 19:39:21 +1000[diff] [blame]57extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
Michael Ellerman032de8e2007-04-18 19:39:22 +1000[diff] [blame]58extern void arch_teardown_msi_irqs(struct pci_dev *dev);
Michael Ellermanc9953a72007-04-05 17:19:08 +1000[diff] [blame]59extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]60
61
62#endif /* LINUX_MSI_H */