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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));
/*
* Similar to vfio_device_info, but without caps (yet).
*/
struct vfio_user_device_info {
uint32_t argsz;
/* VFIO_DEVICE_FLAGS_* */
uint32_t flags;
uint32_t num_regions;
uint32_t num_irqs;
} __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));
#ifdef __cplusplus
}
#endif
#endif /* VFIO_USER_H */
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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