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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
59
60 void *opaque;
61 const char *name;
62 uint32_t flags;
63
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);
83void vfio_platform_remove_common(struct vfio_platform_device *vdev);
84
85extern int vfio_platform_irq_init(struct vfio_platform_device *vdev);
86extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
87
88extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
89 uint32_t flags, unsigned index,
90 unsigned start, unsigned count,
91 void *data);
92
93extern void __vfio_platform_register_reset(struct vfio_platform_reset_node *n);
94extern void vfio_platform_unregister_reset(const char *compat,
95 vfio_platform_reset_fn_t fn);
96#define vfio_platform_register_reset(__compat, __reset) \
97static struct vfio_platform_reset_node __reset ## _node = { \
98 .owner = THIS_MODULE, \
99 .compat = __compat, \
100 .of_reset = __reset, \
101}; \
102__vfio_platform_register_reset(&__reset ## _node)
103
104#define module_vfio_reset_handler(compat, reset) \
105MODULE_ALIAS("vfio-reset:" compat); \
106static int __init reset ## _module_init(void) \
107{ \
108 vfio_platform_register_reset(compat, reset); \
109 return 0; \
110}; \
111static void __exit reset ## _module_exit(void) \
112{ \
113 vfio_platform_unregister_reset(compat, reset); \
114}; \
115module_init(reset ## _module_init); \
116module_exit(reset ## _module_exit)
117
118#endif
119