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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2013 - Virtual Open Systems
* Author: Antonios Motakis <a.motakis@virtualopensystems.com>
*/
#ifndef VFIO_PLATFORM_PRIVATE_H
#define VFIO_PLATFORM_PRIVATE_H
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/vfio.h>
#define VFIO_PLATFORM_OFFSET_SHIFT 40
#define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1)
#define VFIO_PLATFORM_OFFSET_TO_INDEX(off) \
(off >> VFIO_PLATFORM_OFFSET_SHIFT)
#define VFIO_PLATFORM_INDEX_TO_OFFSET(index) \
((u64)(index) << VFIO_PLATFORM_OFFSET_SHIFT)
struct vfio_platform_irq {
u32 flags;
u32 count;
int hwirq;
char *name;
struct eventfd_ctx *trigger;
bool masked;
spinlock_t lock;
struct virqfd *unmask;
struct virqfd *mask;
};
struct vfio_platform_region {
u64 addr;
resource_size_t size;
u32 flags;
u32 type;
#define VFIO_PLATFORM_REGION_TYPE_MMIO 1
#define VFIO_PLATFORM_REGION_TYPE_PIO 2
void __iomem *ioaddr;
};
struct vfio_platform_device {
struct vfio_device vdev;
struct vfio_platform_region *regions;
u32 num_regions;
struct vfio_platform_irq *irqs;
u32 num_irqs;
int refcnt;
struct mutex igate;
struct module *parent_module;
const char *compat;
const char *acpihid;
struct module *reset_module;
struct device *device;
/*
* These fields should be filled by the bus specific binder
*/
void *opaque;
const char *name;
uint32_t flags;
/* callbacks to discover device resources */
struct resource*
(*get_resource)(struct vfio_platform_device *vdev, int i);
int (*get_irq)(struct vfio_platform_device *vdev, int i);
int (*of_reset)(struct vfio_platform_device *vdev);
bool reset_required;
};
typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev);
struct vfio_platform_reset_node {
struct list_head link;
char *compat;
struct module *owner;
vfio_platform_reset_fn_t of_reset;
};
extern int vfio_platform_probe_common(struct vfio_platform_device *vdev,
struct device *dev);
void vfio_platform_remove_common(struct vfio_platform_device *vdev);
extern int vfio_platform_irq_init(struct vfio_platform_device *vdev);
extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev);
extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
uint32_t flags, unsigned index,
unsigned start, unsigned count,
void *data);
extern void __vfio_platform_register_reset(struct vfio_platform_reset_node *n);
extern void vfio_platform_unregister_reset(const char *compat,
vfio_platform_reset_fn_t fn);
#define vfio_platform_register_reset(__compat, __reset) \
static struct vfio_platform_reset_node __reset ## _node = { \
.owner = THIS_MODULE, \
.compat = __compat, \
.of_reset = __reset, \
}; \
__vfio_platform_register_reset(&__reset ## _node)
#define module_vfio_reset_handler(compat, reset) \
MODULE_ALIAS("vfio-reset:" compat); \
static int __init reset ## _module_init(void) \
{ \
vfio_platform_register_reset(compat, reset); \
return 0; \
}; \
static void __exit reset ## _module_exit(void) \
{ \
vfio_platform_unregister_reset(compat, reset); \
}; \
module_init(reset ## _module_init); \
module_exit(reset ## _module_exit)
#endif /* VFIO_PLATFORM_PRIVATE_H */
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