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gerrit.openfyde.cn / github.com / raspberrypi / raspberrypi-kernel / 280510f1060b4fb2f5853a92b7723e5330529338 / . / include / linux / msi.h
blob: 1dcad0c1e80692df26713221eb81b74913f42967 [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
Yijing Wang38737d82014-10-27 10:44:36 +0800[diff] [blame]13extern int pci_msi_ignore_mask;
Satoru Takeuchic54c1872007-01-18 13:50:05 +0900[diff] [blame]14/* Helper functions */
Thomas Gleixner1c9db522010-09-28 16:46:51 +0200[diff] [blame]15struct irq_data;
Thomas Gleixner39431ac2010-09-28 19:09:51 +0200[diff] [blame]16struct msi_desc;
Bjorn Helgaas2366d062013-04-18 10:55:46 -0600[diff] [blame]17void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
Bjorn Helgaas2366d062013-04-18 10:55:46 -0600[diff] [blame]18void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
Jiang Liu891d4a42014-11-09 23:10:33 +0800[diff] [blame]19
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]20struct msi_desc {
21 struct {
Matthew Wilcox24d275532009-03-17 08:54:06 -0400[diff] [blame]22 __u8 is_msix : 1;
Yijing Wang31ea5d42014-06-19 16:30:30 +0800[diff] [blame]23 __u8 multiple: 3; /* log2 num of messages allocated */
24 __u8 multi_cap : 3; /* log2 num of messages supported */
Bjorn Helgaasf7625982013-11-14 11:28:18 -0700[diff] [blame]25 __u8 maskbit : 1; /* mask-pending bit supported ? */
26 __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
Bjorn Helgaasf7625982013-11-14 11:28:18 -0700[diff] [blame]27 __u16 entry_nr; /* specific enabled entry */
28 unsigned default_irq; /* default pre-assigned irq */
Matthew Wilcoxf2440d92009-03-17 08:54:09 -0400[diff] [blame]29 } msi_attrib;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]30
Matthew Wilcoxf2440d92009-03-17 08:54:09 -0400[diff] [blame]31 u32 masked; /* mask bits */
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]32 unsigned int irq;
Alexander Gordeev65f6ae62013-05-13 11:05:48 +0200[diff] [blame]33 unsigned int nvec_used; /* number of messages */
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000[diff] [blame]34 struct list_head list;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]35
Matthew Wilcox264d9ca2009-03-17 08:54:08 -0400[diff] [blame]36 union {
37 void __iomem *mask_base;
38 u8 mask_pos;
39 };
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]40 struct pci_dev *dev;
41
Eric W. Biederman392ee1e2007-03-08 13:04:57 -0700[diff] [blame]42 /* Last set MSI message */
43 struct msi_msg msg;
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]44};
45
Jiang Liu891d4a42014-11-09 23:10:33 +0800[diff] [blame]46void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
Jiang Liu83a18912014-11-09 23:10:34 +0800[diff] [blame]47void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
48void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
49
Thomas Gleixner23ed8d52014-11-23 11:55:58 +0100[diff] [blame]50u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag);
51u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag);
52void pci_msi_mask_irq(struct irq_data *data);
53void pci_msi_unmask_irq(struct irq_data *data);
54
Jiang Liu83a18912014-11-09 23:10:34 +0800[diff] [blame]55/* Conversion helpers. Should be removed after merging */
56static inline void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
57{
58 __pci_write_msi_msg(entry, msg);
59}
60static inline void write_msi_msg(int irq, struct msi_msg *msg)
61{
62 pci_write_msi_msg(irq, msg);
63}
Thomas Gleixner23ed8d52014-11-23 11:55:58 +0100[diff] [blame]64static inline void mask_msi_irq(struct irq_data *data)
65{
66 pci_msi_mask_irq(data);
67}
68static inline void unmask_msi_irq(struct irq_data *data)
69{
70 pci_msi_unmask_irq(data);
71}
Jiang Liu891d4a42014-11-09 23:10:33 +0800[diff] [blame]72
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]73/*
Thomas Petazzoni4287d822013-08-09 22:27:06 +0200[diff] [blame]74 * The arch hooks to setup up msi irqs. Those functions are
75 * implemented as weak symbols so that they /can/ be overriden by
76 * architecture specific code if needed.
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]77 */
Eric W. Biedermanf7feaca2007-01-28 12:56:37 -0700[diff] [blame]78int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]79void arch_teardown_msi_irq(unsigned int irq);
Bjorn Helgaas2366d062013-04-18 10:55:46 -0600[diff] [blame]80int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
81void arch_teardown_msi_irqs(struct pci_dev *dev);
DuanZhenzhongac8344c2013-12-04 13:09:16 +0800[diff] [blame]82void arch_restore_msi_irqs(struct pci_dev *dev);
Thomas Petazzoni4287d822013-08-09 22:27:06 +0200[diff] [blame]83
84void default_teardown_msi_irqs(struct pci_dev *dev);
DuanZhenzhongac8344c2013-12-04 13:09:16 +0800[diff] [blame]85void default_restore_msi_irqs(struct pci_dev *dev);
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]86
Yijing Wangc2791b82014-11-11 17:45:45 -0700[diff] [blame]87struct msi_controller {
Thierry Reding0cbdcfc2013-08-09 22:27:08 +0200[diff] [blame]88 struct module *owner;
89 struct device *dev;
Thomas Petazzoni0d5a6db2013-08-09 22:27:09 +0200[diff] [blame]90 struct device_node *of_node;
91 struct list_head list;
Thierry Reding0cbdcfc2013-08-09 22:27:08 +0200[diff] [blame]92
Yijing Wangc2791b82014-11-11 17:45:45 -0700[diff] [blame]93 int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
Thierry Reding0cbdcfc2013-08-09 22:27:08 +0200[diff] [blame]94 struct msi_desc *desc);
Yijing Wangc2791b82014-11-11 17:45:45 -0700[diff] [blame]95 void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
Thierry Reding0cbdcfc2013-08-09 22:27:08 +0200[diff] [blame]96};
97
Eric W. Biederman3b7d1922006-10-04 02:16:59 -0700[diff] [blame]98#endif /* LINUX_MSI_H */