LXR qemu/include/hw/virtio/virtio-mmio.h

   1/*
   2 * Virtio MMIO bindings
   3 *
   4 * Copyright (c) 2011 Linaro Limited
   5 *
   6 * Author:
   7 *  Peter Maydell <peter.maydell@linaro.org>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License; either version 2
  11 * of the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License along
  19 * with this program; if not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22#ifndef HW_VIRTIO_MMIO_H
  23#define HW_VIRTIO_MMIO_H
  24
  25#include "hw/virtio/virtio-bus.h"
  26#include "qom/object.h"
  27
  28/* QOM macros */
  29/* virtio-mmio-bus */
  30#define TYPE_VIRTIO_MMIO_BUS "virtio-mmio-bus"
  31/* This is reusing the VirtioBusState typedef from TYPE_VIRTIO_BUS */
  32DECLARE_OBJ_CHECKERS(VirtioBusState, VirtioBusClass,
  33                     VIRTIO_MMIO_BUS, TYPE_VIRTIO_MMIO_BUS)
  34
  35/* virtio-mmio */
  36#define TYPE_VIRTIO_MMIO "virtio-mmio"
  37OBJECT_DECLARE_SIMPLE_TYPE(VirtIOMMIOProxy, VIRTIO_MMIO)
  38
  39#define VIRT_MAGIC 0x74726976 /* 'virt' */
  40#define VIRT_VERSION 2
  41#define VIRT_VERSION_LEGACY 1
  42#define VIRT_VENDOR 0x554D4551 /* 'QEMU' */
  43
  44typedef struct VirtIOMMIOQueue {
  45    uint16_t num;
  46    bool enabled;
  47    uint32_t desc[2];
  48    uint32_t avail[2];
  49    uint32_t used[2];
  50} VirtIOMMIOQueue;
  51
  52#define VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD_BIT 1
  53#define VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD \
  54        (1 << VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD_BIT)
  55
  56struct VirtIOMMIOProxy {
  57    /* Generic */
  58    SysBusDevice parent_obj;
  59    MemoryRegion iomem;
  60    qemu_irq irq;
  61    bool legacy;
  62    uint32_t flags;
  63    /* Guest accessible state needing migration and reset */
  64    uint32_t host_features_sel;
  65    uint32_t guest_features_sel;
  66    uint32_t guest_page_shift;
  67    /* virtio-bus */
  68    VirtioBusState bus;
  69    bool format_transport_address;
  70    /* Fields only used for non-legacy (v2) devices */
  71    uint32_t guest_features[2];
  72    VirtIOMMIOQueue vqs[VIRTIO_QUEUE_MAX];
  73};
  74
  75#endif
  76