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Linux kernel mirror (for testing)
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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
13#define VFIO_PLATFORM_OFFSET_SHIFT 40
14#define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1)
15
16#define VFIO_PLATFORM_OFFSET_TO_INDEX(off) \
17 (off >> VFIO_PLATFORM_OFFSET_SHIFT)
18
19#define VFIO_PLATFORM_INDEX_TO_OFFSET(index) \
20 ((u64)(index) << VFIO_PLATFORM_OFFSET_SHIFT)
21
22struct vfio_platform_irq {
23 u32 flags;
24 u32 count;
25 int hwirq;
26 char *name;
27 struct eventfd_ctx *trigger;
28 bool masked;
29 spinlock_t lock;
30 struct virqfd *unmask;
31 struct virqfd *mask;
32};
33
34struct vfio_platform_region {
35 u64 addr;
36 resource_size_t size;
37 u32 flags;
38 u32 type;
39#define VFIO_PLATFORM_REGION_TYPE_MMIO 1
40#define VFIO_PLATFORM_REGION_TYPE_PIO 2
41 void __iomem *ioaddr;
42};
43
44struct vfio_platform_device {
45 struct vfio_platform_region *regions;
46 u32 num_regions;
47 struct vfio_platform_irq *irqs;
48 u32 num_irqs;
49 int refcnt;
50 struct mutex igate;
51 struct module *parent_module;
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
81extern int vfio_platform_probe_common(struct vfio_platform_device *vdev,
82 struct device *dev);
83extern struct vfio_platform_device *vfio_platform_remove_common
84 (struct device *dev);
85
86extern int vfio_platform_irq_init(struct vfio_platform_device *vdev);
87extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
88
89extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
90 uint32_t flags, unsigned index,
91 unsigned start, unsigned count,
92 void *data);
93
94extern void __vfio_platform_register_reset(struct vfio_platform_reset_node *n);
95extern void vfio_platform_unregister_reset(const char *compat,
96 vfio_platform_reset_fn_t fn);
97#define vfio_platform_register_reset(__compat, __reset) \
98static struct vfio_platform_reset_node __reset ## _node = { \
99 .owner = THIS_MODULE, \
100 .compat = __compat, \
101 .of_reset = __reset, \
102}; \
103__vfio_platform_register_reset(&__reset ## _node)
104
105#define module_vfio_reset_handler(compat, reset) \
106MODULE_ALIAS("vfio-reset:" compat); \
107static int __init reset ## _module_init(void) \
108{ \
109 vfio_platform_register_reset(compat, reset); \
110 return 0; \
111}; \
112static void __exit reset ## _module_exit(void) \
113{ \
114 vfio_platform_unregister_reset(compat, reset); \
115}; \
116module_init(reset ## _module_init); \
117module_exit(reset ## _module_exit)
118
119#endif /* VFIO_PLATFORM_PRIVATE_H */