tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2013 - Virtual Open Systems
4 * Author: Antonios Motakis <a.motakis@virtualopensystems.com>
5 */
6
7#ifndef VFIO_PLATFORM_PRIVATE_H
8#define VFIO_PLATFORM_PRIVATE_H
9
10#include <linux/types.h>
11#include <linux/interrupt.h>
12#include <linux/vfio.h>
13
14#define VFIO_PLATFORM_OFFSET_SHIFT 40
15#define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1)
16
17#define VFIO_PLATFORM_OFFSET_TO_INDEX(off) \
18 (off >> VFIO_PLATFORM_OFFSET_SHIFT)
19
20#define VFIO_PLATFORM_INDEX_TO_OFFSET(index) \
21 ((u64)(index) << VFIO_PLATFORM_OFFSET_SHIFT)
22
23struct vfio_platform_irq {
24 u32 flags;
25 u32 count;
26 int hwirq;
27 char *name;
28 struct eventfd_ctx *trigger;
29 bool masked;
30 spinlock_t lock;
31 struct virqfd *unmask;
32 struct virqfd *mask;
33};
34
35struct vfio_platform_region {
36 u64 addr;
37 resource_size_t size;
38 u32 flags;
39 u32 type;
40#define VFIO_PLATFORM_REGION_TYPE_MMIO 1
41#define VFIO_PLATFORM_REGION_TYPE_PIO 2
42 void __iomem *ioaddr;
43};
44
45struct vfio_platform_device {
46 struct vfio_device vdev;
47 struct vfio_platform_region *regions;
48 u32 num_regions;
49 struct vfio_platform_irq *irqs;
50 u32 num_irqs;
51 struct mutex igate;
52 const char *compat;
53 const char *acpihid;
54 struct module *reset_module;
55 struct device *device;
56
57 /*
58 * These fields should be filled by the bus specific binder
59 */
60 void *opaque;
61 const char *name;
62 uint32_t flags;
63 /* callbacks to discover device resources */
64 struct resource*
65 (*get_resource)(struct vfio_platform_device *vdev, int i);
66 int (*get_irq)(struct vfio_platform_device *vdev, int i);
67 int (*of_reset)(struct vfio_platform_device *vdev);
68
69 bool reset_required;
70};
71
72typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev);
73
74struct vfio_platform_reset_node {
75 struct list_head link;
76 char *compat;
77 struct module *owner;
78 vfio_platform_reset_fn_t of_reset;
79};
80
81int vfio_platform_probe_common(struct vfio_platform_device *vdev,
82 struct device *dev);
83void vfio_platform_remove_common(struct vfio_platform_device *vdev);
84
85int vfio_platform_irq_init(struct vfio_platform_device *vdev);
86void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
87
88int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
89 uint32_t flags, unsigned index,
90 unsigned start, unsigned count, void *data);
91
92void __vfio_platform_register_reset(struct vfio_platform_reset_node *n);
93void vfio_platform_unregister_reset(const char *compat,
94 vfio_platform_reset_fn_t fn);
95#define vfio_platform_register_reset(__compat, __reset) \
96static struct vfio_platform_reset_node __reset ## _node = { \
97 .owner = THIS_MODULE, \
98 .compat = __compat, \
99 .of_reset = __reset, \
100}; \
101__vfio_platform_register_reset(&__reset ## _node)
102
103#define module_vfio_reset_handler(compat, reset) \
104MODULE_ALIAS("vfio-reset:" compat); \
105static int __init reset ## _module_init(void) \
106{ \
107 vfio_platform_register_reset(compat, reset); \
108 return 0; \
109}; \
110static void __exit reset ## _module_exit(void) \
111{ \
112 vfio_platform_unregister_reset(compat, reset); \
113}; \
114module_init(reset ## _module_init); \
115module_exit(reset ## _module_exit)
116
117#endif /* VFIO_PLATFORM_PRIVATE_H */