LXR qemu/include/standard-headers/linux/virtio

   1/* SPDX-License-Identifier: GPL-2.0-or-later WITH Linux-syscall-note */
   2/*
   3 * Definitions for virtio I2C Adpter
   4 *
   5 * Copyright (c) 2021 Intel Corporation. All rights reserved.
   6 */
   7
   8#ifndef _LINUX_VIRTIO_I2C_H
   9#define _LINUX_VIRTIO_I2C_H
  10
  11#include "standard-headers/linux/const.h"
  12#include "standard-headers/linux/types.h"
  13
  14/* Virtio I2C Feature bits */
  15#define VIRTIO_I2C_F_ZERO_LENGTH_REQUEST        0
  16
  17/* The bit 0 of the @virtio_i2c_out_hdr.@flags, used to group the requests */
  18#define VIRTIO_I2C_FLAGS_FAIL_NEXT      _BITUL(0)
  19
  20/* The bit 1 of the @virtio_i2c_out_hdr.@flags, used to mark a buffer as read */
  21#define VIRTIO_I2C_FLAGS_M_RD           _BITUL(1)
  22
  23/**
  24 * struct virtio_i2c_out_hdr - the virtio I2C message OUT header
  25 * @addr: the controlled device address
  26 * @padding: used to pad to full dword
  27 * @flags: used for feature extensibility
  28 */
  29struct virtio_i2c_out_hdr {
  30        uint16_t addr;
  31        uint16_t padding;
  32        uint32_t flags;
  33};
  34
  35/**
  36 * struct virtio_i2c_in_hdr - the virtio I2C message IN header
  37 * @status: the processing result from the backend
  38 */
  39struct virtio_i2c_in_hdr {
  40        uint8_t status;
  41};
  42
  43/* The final status written by the device */
  44#define VIRTIO_I2C_MSG_OK       0
  45#define VIRTIO_I2C_MSG_ERR      1
  46
  47#endif /* _LINUX_VIRTIO_I2C_H */
  48