mirror of https://gitee.com/openkylin/linux.git
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2013 - Virtual Open Systems
|
|
* Author: Antonios Motakis <a.motakis@virtualopensystems.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef VFIO_PLATFORM_PRIVATE_H
|
|
#define VFIO_PLATFORM_PRIVATE_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.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_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;
|
|
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 (*reset)(struct vfio_platform_device *vdev);
|
|
};
|
|
|
|
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 reset;
|
|
};
|
|
|
|
extern int vfio_platform_probe_common(struct vfio_platform_device *vdev,
|
|
struct device *dev);
|
|
extern struct vfio_platform_device *vfio_platform_remove_common
|
|
(struct device *dev);
|
|
|
|
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, \
|
|
.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 */
|