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/*
* Copyright (c) 2020 Nutanix Inc. All rights reserved.
*
* Derived from Intel's vfio-user.h:
* Copyright (c) 2020 Intel Corporation. All rights reserved.
*
* Authors: Changpeng Liu <changpeng.liu@intel.com>
* Thanos Makatos <thanos@nutanix.com>
* Swapnil Ingle <swapnil.ingle@nutanix.com>
* John Levon <john.levon@nutanix.com>
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Nutanix nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*/
#ifndef VFIO_USER_H
#define VFIO_USER_H
/*
* Shared definitions for the vfio-user protocol.
*/
#include <inttypes.h>
#include <linux/vfio.h>
#include <linux/version.h>
#ifdef __cplusplus
extern "C" {
#endif
enum vfio_user_command {
VFIO_USER_VERSION = 1,
VFIO_USER_DMA_MAP = 2,
VFIO_USER_DMA_UNMAP = 3,
VFIO_USER_DEVICE_GET_INFO = 4,
VFIO_USER_DEVICE_GET_REGION_INFO = 5,
VFIO_USER_DEVICE_GET_IRQ_INFO = 6,
VFIO_USER_DEVICE_SET_IRQS = 7,
VFIO_USER_REGION_READ = 8,
VFIO_USER_REGION_WRITE = 9,
VFIO_USER_DMA_READ = 10,
VFIO_USER_DMA_WRITE = 11,
VFIO_USER_VM_INTERRUPT = 12,
VFIO_USER_DEVICE_RESET = 13,
VFIO_USER_DIRTY_PAGES = 14,
VFIO_USER_MAX,
};
enum vfio_user_message_type {
VFIO_USER_MESSAGE_COMMAND = 0,
VFIO_USER_MESSAGE_REPLY = 1,
};
#define VFIO_USER_FLAGS_NO_REPLY (0x1)
struct vfio_user_header {
uint16_t msg_id;
uint16_t cmd;
uint32_t msg_size;
struct {
uint32_t type : 4;
#define VFIO_USER_F_TYPE_COMMAND 0
#define VFIO_USER_F_TYPE_REPLY 1
uint32_t no_reply : 1;
uint32_t error : 1;
uint32_t resvd : 26;
} flags;
uint32_t error_no;
} __attribute__((packed));
struct vfio_user_version {
uint16_t major;
uint16_t minor;
uint8_t data[];
} __attribute__((packed));
struct vfio_user_dma_region {
uint64_t addr;
uint64_t size;
uint64_t offset;
uint32_t prot;
uint32_t flags;
#define VFIO_USER_F_DMA_REGION_MAPPABLE (1 << 0)
} __attribute__((packed));
struct vfio_user_region_access {
uint64_t offset;
uint32_t region;
uint32_t count;
uint8_t data[];
} __attribute__((packed));
struct vfio_user_dma_region_access {
uint64_t addr;
uint32_t count;
uint8_t data[];
} __attribute__((packed));
struct vfio_user_irq_info {
uint32_t subindex;
} __attribute__((packed));
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,8,0)
/* copied from <linux/vfio.h> */
#define VFIO_DEVICE_STATE_STOP (0)
#define VFIO_DEVICE_STATE_RUNNING (1 << 0)
#define VFIO_DEVICE_STATE_SAVING (1 << 1)
#define VFIO_DEVICE_STATE_RESUMING (1 << 2)
#define VFIO_DEVICE_STATE_MASK (VFIO_DEVICE_STATE_RUNNING | \
VFIO_DEVICE_STATE_SAVING | \
VFIO_DEVICE_STATE_RESUMING)
#define VFIO_DEVICE_STATE_VALID(state) \
(state & VFIO_DEVICE_STATE_RESUMING ? \
(state & VFIO_DEVICE_STATE_MASK) == VFIO_DEVICE_STATE_RESUMING : 1)
#define VFIO_DEVICE_STATE_IS_ERROR(state) \
((state & VFIO_DEVICE_STATE_MASK) == (VFIO_DEVICE_STATE_SAVING | \
VFIO_DEVICE_STATE_RESUMING))
#define VFIO_DEVICE_STATE_SET_ERROR(state) \
((state & ~VFIO_DEVICE_STATE_MASK) | VFIO_DEVICE_SATE_SAVING | \
VFIO_DEVICE_STATE_RESUMING)
/* RHEL kernels have some of it backported */
#ifndef VFIO_REGION_TYPE_MIGRATION /* not a RHEL kernel */
#define VFIO_REGION_TYPE_MIGRATION (3)
#define VFIO_REGION_SUBTYPE_MIGRATION (1)
struct vfio_device_migration_info {
__u32 device_state; /* VFIO device state */
__u32 reserved;
__u64 pending_bytes;
__u64 data_offset;
__u64 data_size;
};
#endif /* not a RHEL kernel */
struct vfio_bitmap {
__u64 pgsize; /* page size for bitmap in bytes */
__u64 size; /* in bytes */
__u64 *data; /* one bit per page */
};
struct vfio_iommu_type1_dirty_bitmap {
__u32 argsz;
__u32 flags;
#define VFIO_IOMMU_DIRTY_PAGES_FLAG_START (1 << 0)
#define VFIO_IOMMU_DIRTY_PAGES_FLAG_STOP (1 << 1)
#define VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP (1 << 2)
__u8 data[];
};
struct vfio_iommu_type1_dirty_bitmap_get {
__u64 iova; /* IO virtual address */
__u64 size; /* Size of iova range */
struct vfio_bitmap bitmap;
};
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(5,8,0) */
#ifdef __cplusplus
}
#endif
#endif /* VFIO_USER_H */
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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