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gerrit-public.fairphone.software / kernel / msm-4.9 / a0cdf960bec0b040307229bc25c40fa33c20dff1 / . / include / linux / msi.h
blob: b17ead818aecddd06269190931cbeda9037a968e [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;
Bjorn Helgaas2366d062013-04-18 10:55:46 -0600[diff] [blame]16void mask_msi_irq(struct irq_data *data);
17void unmask_msi_irq(struct irq_data *data);
18void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
19void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
20void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
21void read_msi_msg(unsigned int irq, struct msi_msg *msg);
22void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
23void write_msi_msg(unsigned int irq, struct msi_msg *msg);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]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;
Alexander Gordeev65f6ae62013-05-13 11:05:48 +0200[diff] [blame]38 unsigned int nvec_used; /* number of messages */
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]39 struct list_head list;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]40
Matthew Wilcox264d9ca2009-03-17 08:54:08 -0400[diff] [blame]41 union {
42 void __iomem *mask_base;
43 u8 mask_pos;
44 };
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]45 struct pci_dev *dev;
46
Eric W. Biederman392ee1e2007-03-08 13:04:57 -0700[diff] [blame]47 /* Last set MSI message */
48 struct msi_msg msg;
Neil Hormanb50cac52011-10-06 14:08:18 -0400[diff] [blame]49
50 struct kobject kobj;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]51};
52
53/*
Thomas Petazzoni4287d822013-08-09 22:27:06 +0200[diff] [blame]54 * The arch hooks to setup up msi irqs. Those functions are
55 * implemented as weak symbols so that they /can/ be overriden by
56 * architecture specific code if needed.
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]57 */
Eric W. Biedermanf7feaca2007-01-28 12:56:37 -0700[diff] [blame]58int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]59void arch_teardown_msi_irq(unsigned int irq);
Bjorn Helgaas2366d062013-04-18 10:55:46 -0600[diff] [blame]60int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
61void arch_teardown_msi_irqs(struct pci_dev *dev);
62int arch_msi_check_device(struct pci_dev* dev, int nvec, int type);
Thomas Petazzoni4287d822013-08-09 22:27:06 +0200[diff] [blame]63void arch_restore_msi_irqs(struct pci_dev *dev, int irq);
64
65void default_teardown_msi_irqs(struct pci_dev *dev);
66void default_restore_msi_irqs(struct pci_dev *dev, int irq);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]67
Thierry Reding0cbdcfc2013-08-09 22:27:08 +0200[diff] [blame]68struct msi_chip {
69 struct module *owner;
70 struct device *dev;
Thomas Petazzoni0d5a6db2013-08-09 22:27:09 +0200[diff] [blame]71 struct device_node *of_node;
72 struct list_head list;
Thierry Reding0cbdcfc2013-08-09 22:27:08 +0200[diff] [blame]73
74 int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev,
75 struct msi_desc *desc);
76 void (*teardown_irq)(struct msi_chip *chip, unsigned int irq);
77 int (*check_device)(struct msi_chip *chip, struct pci_dev *dev,
78 int nvec, int type);
79};
80
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]81#endif /* LINUX_MSI_H */