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/*

 * QEMU S390x VirtIO BUS definitions

 *

 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

#define VIRTIO_DEV_OFFS_TYPE                0        /* 8 bits */

#define VIRTIO_DEV_OFFS_NUM_VQ                1        /* 8 bits */

#define VIRTIO_DEV_OFFS_FEATURE_LEN        2        /* 8 bits */

#define VIRTIO_DEV_OFFS_CONFIG_LEN        3        /* 8 bits */

#define VIRTIO_DEV_OFFS_STATUS                4        /* 8 bits */

#define VIRTIO_DEV_OFFS_CONFIG                5        /* dynamic */

#define VIRTIO_VQCONFIG_OFFS_TOKEN        0        /* 64 bits */

#define VIRTIO_VQCONFIG_OFFS_ADDRESS        8        /* 64 bits */

#define VIRTIO_VQCONFIG_OFFS_NUM        16        /* 16 bits */

#define VIRTIO_VQCONFIG_LEN                24

#define VIRTIO_RING_LEN                        (TARGET_PAGE_SIZE * 3)

#define S390_DEVICE_PAGES                256

typedef struct VirtIOS390Device {

    DeviceState qdev;

    ram_addr_t dev_offs;

    ram_addr_t feat_offs;

    uint8_t feat_len;

    VirtIODevice *vdev;

    BlockConf block;

    NICConf nic;

    uint32_t host_features;

    /* Max. number of ports we can have for a the virtio-serial device */

    uint32_t max_virtserial_ports;

} VirtIOS390Device;

typedef struct VirtIOS390Bus {

    BusState bus;

    VirtIOS390Device *console;

    ram_addr_t dev_page;

    ram_addr_t dev_offs;

    ram_addr_t next_ring;

} VirtIOS390Bus;

extern void s390_virtio_device_update_status(VirtIOS390Device *dev);

extern VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);

extern VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);

extern VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,

                                                    ram_addr_t mem,

                                                    int *vq_num);

extern VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus,

                                                  ram_addr_t mem);