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gerrit-public.fairphone.software / kernel / msm / bf482c6069b514b7fe57a048ae1b6f11cf3bb10c / . / include / linux / msi.h
blob: 05acced439a38ec1faf822200740d032778e9022 [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
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]4#include <linux/list.h>
5
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]6struct msi_msg {
7 u32 address_lo; /* low 32 bits of msi message address */
8 u32 address_hi; /* high 32 bits of msi message address */
9 u32 data; /* 16 bits of msi message data */
10};
11
Satoru Takeuchic54c1872007-01-18 13:50:05 +0900[diff] [blame]12/* Helper functions */
Thomas Gleixner1c9db522010-09-28 16:46:51 +0200[diff] [blame]13struct irq_data;
Thomas Gleixner39431ac2010-09-28 19:09:51 +0200[diff] [blame]14struct msi_desc;
Thomas Gleixner1c9db522010-09-28 16:46:51 +0200[diff] [blame]15extern void mask_msi_irq(struct irq_data *data);
16extern void unmask_msi_irq(struct irq_data *data);
Thomas Gleixner39431ac2010-09-28 19:09:51 +0200[diff] [blame]17extern void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
18extern void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
19extern void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]20extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
Ben Hutchings30da5522010-07-23 14:56:28 +0100[diff] [blame]21extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]22extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
23
24struct msi_desc {
25 struct {
Matthew Wilcox24d27552009-03-17 08:54:06 -0400[diff] [blame]26 __u8 is_msix : 1;
Matthew Wilcox1c8d7b02009-03-17 08:54:10 -0400[diff] [blame]27 __u8 multiple: 3; /* log2 number of messages */
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]28 __u8 maskbit : 1; /* mask-pending bit supported ? */
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]29 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
30 __u8 pos; /* Location of the msi capability */
31 __u16 entry_nr; /* specific enabled entry */
32 unsigned default_irq; /* default pre-assigned irq */
Matthew Wilcoxf2440d92009-03-17 08:54:09 -0400[diff] [blame]33 } msi_attrib;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]34
Matthew Wilcoxf2440d92009-03-17 08:54:09 -0400[diff] [blame]35 u32 masked; /* mask bits */
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]36 unsigned int irq;
37 struct list_head list;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]38
Matthew Wilcox264d9ca2009-03-17 08:54:08 -0400[diff] [blame]39 union {
40 void __iomem *mask_base;
41 u8 mask_pos;
42 };
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]43 struct pci_dev *dev;
44
Eric W. Biederman392ee1e2007-03-08 13:04:57 -0700[diff] [blame]45 /* Last set MSI message */
46 struct msi_msg msg;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]47};
48
49/*
50 * The arch hook for setup up msi irqs
51 */
Eric W. Biedermanf7feaca2007-01-28 12:56:37 -0700[diff] [blame]52int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]53void arch_teardown_msi_irq(unsigned int irq);
Michael Ellerman9c831332007-04-18 19:39:21 +1000[diff] [blame]54extern int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
Michael Ellerman032de8e2007-04-18 19:39:22 +1000[diff] [blame]55extern void arch_teardown_msi_irqs(struct pci_dev *dev);
Michael Ellermanc9953a72007-04-05 17:19:08 +1000[diff] [blame]56extern int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]57
58
59#endif /* LINUX_MSI_H */