hw/s390-virtio-bus.h

   1 /*
   2  * QEMU S390x VirtIO BUS definitions
   3  *
   4  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #define VIRTIO_DEV_OFFS_TYPE            0       /* 8 bits */
  21 #define VIRTIO_DEV_OFFS_NUM_VQ          1       /* 8 bits */
  22 #define VIRTIO_DEV_OFFS_FEATURE_LEN     2       /* 8 bits */
  23 #define VIRTIO_DEV_OFFS_CONFIG_LEN      3       /* 8 bits */
  24 #define VIRTIO_DEV_OFFS_STATUS          4       /* 8 bits */
  25 #define VIRTIO_DEV_OFFS_CONFIG          5       /* dynamic */
  26
  27 #define VIRTIO_VQCONFIG_OFFS_TOKEN      0       /* 64 bits */
  28 #define VIRTIO_VQCONFIG_OFFS_ADDRESS    8       /* 64 bits */
  29 #define VIRTIO_VQCONFIG_OFFS_NUM        16      /* 16 bits */
  30 #define VIRTIO_VQCONFIG_LEN             24
  31
  32 #define VIRTIO_RING_LEN                 (TARGET_PAGE_SIZE * 3)
  33 #define S390_DEVICE_PAGES               256
  34
  35 typedef struct VirtIOS390Device {
  36     DeviceState qdev;
  37     ram_addr_t dev_offs;
  38     ram_addr_t feat_offs;
  39     uint8_t feat_len;
  40     VirtIODevice *vdev;
  41     DriveInfo *dinfo;
  42     NICConf nic;
  43 } VirtIOS390Device;
  44
  45 typedef struct VirtIOS390Bus {
  46     BusState bus;
  47
  48     VirtIOS390Device *console;
  49     ram_addr_t dev_page;
  50     ram_addr_t dev_offs;
  51     ram_addr_t next_ring;
  52 } VirtIOS390Bus;
  53
  54
  55 extern void s390_virtio_device_update_status(VirtIOS390Device *dev);
  56
  57 extern VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
  58 extern VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);
  59
  60 extern VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
  61                                                     ram_addr_t mem,
  62                                                     int *vq_num);
  63 extern VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus,
  64                                                   ram_addr_t mem);