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 #define VIRTIO_MMIO_BUS(obj) \
  32         OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_MMIO_BUS)
  33 #define VIRTIO_MMIO_BUS_GET_CLASS(obj) \
  34         OBJECT_GET_CLASS(VirtioBusClass, (obj), TYPE_VIRTIO_MMIO_BUS)
  35 #define VIRTIO_MMIO_BUS_CLASS(klass) \
  36         OBJECT_CLASS_CHECK(VirtioBusClass, (klass), TYPE_VIRTIO_MMIO_BUS)
  37
  38 /* virtio-mmio */
  39 #define TYPE_VIRTIO_MMIO "virtio-mmio"
  40 typedef struct VirtIOMMIOProxy VirtIOMMIOProxy;
  41 #define VIRTIO_MMIO(obj) \
  42         OBJECT_CHECK(VirtIOMMIOProxy, (obj), TYPE_VIRTIO_MMIO)
  43
  44 #define VIRT_MAGIC 0x74726976 /* 'virt' */
  45 #define VIRT_VERSION 2
  46 #define VIRT_VERSION_LEGACY 1
  47 #define VIRT_VENDOR 0x554D4551 /* 'QEMU' */
  48
  49 typedef struct VirtIOMMIOQueue {
  50     uint16_t num;
  51     bool enabled;
  52     uint32_t desc[2];
  53     uint32_t avail[2];
  54     uint32_t used[2];
  55 } VirtIOMMIOQueue;
  56
  57 struct VirtIOMMIOProxy {
  58     /* Generic */
  59     SysBusDevice parent_obj;
  60     MemoryRegion iomem;
  61     qemu_irq irq;
  62     bool legacy;
  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