vfio_platform_private.h (3314B)
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 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 /* VFIO_PLATFORM_PRIVATE_H */