/*
 * 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/>.
 */

#include "virtio-blk.h"
#include "virtio-net.h"
#include "virtio-serial.h"
#include "virtio-scsi.h"

#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 VIRTIO_VRING_AVAIL_IDX_OFFS 2
#define VIRTIO_VRING_USED_IDX_OFFS 2
#define S390_DEVICE_PAGES		512

#define VIRTIO_PARAM_MASK               0xff
#define VIRTIO_PARAM_VRING_INTERRUPT    0x0
#define VIRTIO_PARAM_CONFIG_CHANGED     0x1
#define VIRTIO_PARAM_DEV_ADD            0x2

#define TYPE_VIRTIO_S390_DEVICE "virtio-s390-device"
#define VIRTIO_S390_DEVICE(obj) \
     OBJECT_CHECK(VirtIOS390Device, (obj), TYPE_VIRTIO_S390_DEVICE)
#define VIRTIO_S390_DEVICE_CLASS(klass) \
     OBJECT_CLASS_CHECK(VirtIOS390DeviceClass, (klass), TYPE_VIRTIO_S390_DEVICE)
#define VIRTIO_S390_DEVICE_GET_CLASS(obj) \
     OBJECT_GET_CLASS(VirtIOS390DeviceClass, (obj), TYPE_VIRTIO_S390_DEVICE)

typedef struct VirtIOS390Device VirtIOS390Device;

typedef struct VirtIOS390DeviceClass {
    DeviceClass qdev;
    int (*init)(VirtIOS390Device *dev);
} VirtIOS390DeviceClass;

struct VirtIOS390Device {
    DeviceState qdev;
    ram_addr_t dev_offs;
    ram_addr_t feat_offs;
    uint8_t feat_len;
    VirtIODevice *vdev;
    VirtIOBlkConf blk;
    NICConf nic;
    uint32_t host_features;
    virtio_serial_conf serial;
    virtio_net_conf net;
    VirtIOSCSIConf scsi;
};

typedef struct VirtIOS390Bus {
    BusState bus;

    VirtIOS390Device *console;
    ram_addr_t dev_page;
    ram_addr_t dev_offs;
    ram_addr_t next_ring;
} VirtIOS390Bus;


void s390_virtio_device_update_status(VirtIOS390Device *dev);

VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);

VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
                                             ram_addr_t mem, int *vq_num);
VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem);
void s390_virtio_device_sync(VirtIOS390Device *dev);
void s390_virtio_reset_idx(VirtIOS390Device *dev);