[qemu.git] / hw / s390-virtio-bus.c

/*
 * QEMU S390 virtio target
 *
 * 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 "hw.h"
#include "block.h"
#include "sysemu.h"
#include "net.h"
#include "boards.h"
#include "monitor.h"
#include "loader.h"
#include "elf.h"
#include "hw/virtio.h"
#include "hw/virtio-serial.h"
#include "hw/sysbus.h"
#include "kvm.h"

#include "hw/s390-virtio-bus.h"

/* #define DEBUG_S390 */

#ifdef DEBUG_S390
#define dprintf(fmt, ...) \
    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define dprintf(fmt, ...) \
    do { } while (0)
#endif

struct BusInfo s390_virtio_bus_info = {
    .name       = "s390-virtio",
    .size       = sizeof(VirtIOS390Bus),
};

typedef struct {
    DeviceInfo qdev;
    int (*init)(VirtIOS390Device *dev);
} VirtIOS390DeviceInfo;


static const VirtIOBindings virtio_s390_bindings;

static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);

VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size)
{
    VirtIOS390Bus *bus;
    BusState *_bus;
    DeviceState *dev;

    /* Create bridge device */
    dev = qdev_create(NULL, "s390-virtio-bridge");
    qdev_init_nofail(dev);

    /* Create bus on bridge device */

    _bus = qbus_create(&s390_virtio_bus_info, dev, "s390-virtio");
    bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);

    bus->dev_page = *ram_size;
    bus->dev_offs = bus->dev_page;
    bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;

    /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
    *ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;

    return bus;
}

static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev)
{
    VirtIOS390Bus *bus;
    int dev_len;

    bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
    dev->vdev = vdev;
    dev->dev_offs = bus->dev_offs;
    dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */

    dev_len = VIRTIO_DEV_OFFS_CONFIG;
    dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
    dev_len += dev->feat_len * 2;
    dev_len += vdev->config_len;

    bus->dev_offs += dev_len;

    virtio_bind_device(vdev, &virtio_s390_bindings, dev);
    dev->host_features = vdev->get_features(vdev, dev->host_features);
    s390_virtio_device_sync(dev);

    return 0;
}

static int s390_virtio_net_init(VirtIOS390Device *dev)
{
    VirtIODevice *vdev;

    vdev = virtio_net_init((DeviceState *)dev, &dev->nic);
    if (!vdev) {
        return -1;
    }

    return s390_virtio_device_init(dev, vdev);
}

static int s390_virtio_blk_init(VirtIOS390Device *dev)
{
    VirtIODevice *vdev;

    vdev = virtio_blk_init((DeviceState *)dev, &dev->block);
    if (!vdev) {
        return -1;
    }

    return s390_virtio_device_init(dev, vdev);
}

static int s390_virtio_serial_init(VirtIOS390Device *dev)
{
    VirtIOS390Bus *bus;
    VirtIODevice *vdev;
    int r;

    bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);

    vdev = virtio_serial_init((DeviceState *)dev, dev->max_virtserial_ports);
    if (!vdev) {
        return -1;
    }

    r = s390_virtio_device_init(dev, vdev);
    if (!r) {
        bus->console = dev;
    }

    return r;
}

static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
{
    ram_addr_t token_off;

    token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
                (vq * VIRTIO_VQCONFIG_LEN) +
                VIRTIO_VQCONFIG_OFFS_TOKEN;

    return ldq_phys(token_off);
}

static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
{
    VirtIODevice *vdev = dev->vdev;
    int num_vq;

    for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
        if (!virtio_queue_get_num(vdev, num_vq)) {
            break;
        }
    }

    return num_vq;
}

static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
{
    ram_addr_t r = bus->next_ring;

    bus->next_ring += VIRTIO_RING_LEN;
    return r;
}

void s390_virtio_device_sync(VirtIOS390Device *dev)
{
    VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
    ram_addr_t cur_offs;
    uint8_t num_vq;
    int i;

    virtio_reset(dev->vdev);

    /* Sync dev space */
    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);

    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);

    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);

    num_vq = s390_virtio_device_num_vq(dev);
    stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);

    /* Sync virtqueues */
    for (i = 0; i < num_vq; i++) {
        ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
                        (i * VIRTIO_VQCONFIG_LEN);
        ram_addr_t vring;

        vring = s390_virtio_next_ring(bus);
        virtio_queue_set_addr(dev->vdev, i, vring);
        virtio_queue_set_vector(dev->vdev, i, i);
        stq_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
        stw_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
    }

    cur_offs = dev->dev_offs;
    cur_offs += VIRTIO_DEV_OFFS_CONFIG;
    cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;

    /* Sync feature bitmap */
    stl_phys(cur_offs, dev->host_features);

    dev->feat_offs = cur_offs + dev->feat_len;
    cur_offs += dev->feat_len * 2;

    /* Sync config space */
    if (dev->vdev->get_config) {
        dev->vdev->get_config(dev->vdev, dev->vdev->config);
    }

    cpu_physical_memory_rw(cur_offs, dev->vdev->config, dev->vdev->config_len, 1);
    cur_offs += dev->vdev->config_len;
}

void s390_virtio_device_update_status(VirtIOS390Device *dev)
{
    VirtIODevice *vdev = dev->vdev;
    uint32_t features;

    virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));

    /* Update guest supported feature bitmap */

    features = ldl_phys(dev->feat_offs);
    if (vdev->set_features) {
        vdev->set_features(vdev, features);
    }
    vdev->guest_features = features;
}

VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus)
{
    return bus->console;
}

/* Find a device by vring address */
VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
                                             ram_addr_t mem,
                                             int *vq_num)
{
    VirtIOS390Device *_dev;
    DeviceState *dev;
    int i;

    QLIST_FOREACH(dev, &bus->bus.children, sibling) {
        _dev = (VirtIOS390Device *)dev;
        for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
            if (!virtio_queue_get_addr(_dev->vdev, i))
                break;
            if (virtio_queue_get_addr(_dev->vdev, i) == mem) {
                if (vq_num) {
                    *vq_num = i;
                }
                return _dev;
            }
        }
    }

    return NULL;
}

/* Find a device by device descriptor location */
VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem)
{
    VirtIOS390Device *_dev;
    DeviceState *dev;

    QLIST_FOREACH(dev, &bus->bus.children, sibling) {
        _dev = (VirtIOS390Device *)dev;
        if (_dev->dev_offs == mem) {
            return _dev;
        }
    }

    return NULL;
}

static void virtio_s390_notify(void *opaque, uint16_t vector)
{
    VirtIOS390Device *dev = (VirtIOS390Device*)opaque;
    uint64_t token = s390_virtio_device_vq_token(dev, vector);

    /* XXX kvm dependency! */
    kvm_s390_virtio_irq(s390_cpu_addr2state(0), 0, token);
}

static unsigned virtio_s390_get_features(void *opaque)
{
    VirtIOS390Device *dev = (VirtIOS390Device*)opaque;
    return dev->host_features;
}

/**************** S390 Virtio Bus Device Descriptions *******************/

static const VirtIOBindings virtio_s390_bindings = {
    .notify = virtio_s390_notify,
    .get_features = virtio_s390_get_features,
};

static VirtIOS390DeviceInfo s390_virtio_net = {
    .init = s390_virtio_net_init,
    .qdev.name = "virtio-net-s390",
    .qdev.size = sizeof(VirtIOS390Device),
    .qdev.props = (Property[]) {
        DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
        DEFINE_PROP_END_OF_LIST(),
    },
};

static VirtIOS390DeviceInfo s390_virtio_blk = {
    .init = s390_virtio_blk_init,
    .qdev.name = "virtio-blk-s390",
    .qdev.size = sizeof(VirtIOS390Device),
    .qdev.props = (Property[]) {
        DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block),
        DEFINE_PROP_END_OF_LIST(),
    },
};

static VirtIOS390DeviceInfo s390_virtio_serial = {
    .init = s390_virtio_serial_init,
    .qdev.name = "virtio-serial-s390",
    .qdev.alias = "virtio-serial",
    .qdev.size = sizeof(VirtIOS390Device),
    .qdev.props = (Property[]) {
        DEFINE_PROP_UINT32("max_ports", VirtIOS390Device, max_virtserial_ports,
                           31),
        DEFINE_PROP_END_OF_LIST(),
    },
};

static int s390_virtio_busdev_init(DeviceState *dev, DeviceInfo *info)
{
    VirtIOS390DeviceInfo *_info = (VirtIOS390DeviceInfo *)info;
    VirtIOS390Device *_dev = (VirtIOS390Device *)dev;

    return _info->init(_dev);
}

static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info)
{
    info->qdev.init = s390_virtio_busdev_init;
    info->qdev.bus_info = &s390_virtio_bus_info;

    assert(info->qdev.size >= sizeof(VirtIOS390Device));
    qdev_register(&info->qdev);
}

static void s390_virtio_register(void)
{
    s390_virtio_bus_register_withprop(&s390_virtio_serial);
    s390_virtio_bus_register_withprop(&s390_virtio_blk);
    s390_virtio_bus_register_withprop(&s390_virtio_net);
}
device_init(s390_virtio_register);


/***************** S390 Virtio Bus Bridge Device *******************/
/* Only required to have the virtio bus as child in the system bus */

static int s390_virtio_bridge_init(SysBusDevice *dev)
{
    /* nothing */
    return 0;
}

static SysBusDeviceInfo s390_virtio_bridge_info = {
    .init = s390_virtio_bridge_init,
    .qdev.name  = "s390-virtio-bridge",
    .qdev.size  = sizeof(SysBusDevice),
    .qdev.no_user = 1,
};

static void s390_virtio_register_devices(void)
{
    sysbus_register_withprop(&s390_virtio_bridge_info);
}

device_init(s390_virtio_register_devices)
Commit	Line	Data
f3304eea AG	1	/*
	2	* QEMU S390 virtio target
	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	#include "hw.h"
	21	#include "block.h"
	22	#include "sysemu.h"
	23	#include "net.h"
	24	#include "boards.h"
	25	#include "monitor.h"
	26	#include "loader.h"
	27	#include "elf.h"
	28	#include "hw/virtio.h"
98b19252	29	#include "hw/virtio-serial.h"
f3304eea AG	30	#include "hw/sysbus.h"
	31	#include "kvm.h"
	32
	33	#include "hw/s390-virtio-bus.h"
	34
	35	/* #define DEBUG_S390 */
	36
	37	#ifdef DEBUG_S390
	38	#define dprintf(fmt, ...) \
	39	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	40	#else
	41	#define dprintf(fmt, ...) \
	42	do { } while (0)
	43	#endif
	44
	45	struct BusInfo s390_virtio_bus_info = {
	46	.name = "s390-virtio",
	47	.size = sizeof(VirtIOS390Bus),
	48	};
	49
	50	typedef struct {
	51	DeviceInfo qdev;
	52	int (init)(VirtIOS390Device dev);
	53	} VirtIOS390DeviceInfo;
	54
	55
	56	static const VirtIOBindings virtio_s390_bindings;
	57
	58	static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
f3304eea AG	59
	60	VirtIOS390Bus s390_virtio_bus_init(ram_addr_t ram_size)
	61	{
	62	VirtIOS390Bus *bus;
	63	BusState *_bus;
	64	DeviceState *dev;
	65
	66	/* Create bridge device */
	67	dev = qdev_create(NULL, "s390-virtio-bridge");
	68	qdev_init_nofail(dev);
	69
	70	/* Create bus on bridge device */
	71
	72	_bus = qbus_create(&s390_virtio_bus_info, dev, "s390-virtio");
	73	bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);
	74
	75	bus->dev_page = *ram_size;
	76	bus->dev_offs = bus->dev_page;
	77	bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
	78
	79	/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
	80	ram_size += S390_DEVICE_PAGES TARGET_PAGE_SIZE;
	81
	82	return bus;
	83	}
	84
	85	static int s390_virtio_device_init(VirtIOS390Device dev, VirtIODevice vdev)
	86	{
	87	VirtIOS390Bus *bus;
	88	int dev_len;
	89
	90	bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	91	dev->vdev = vdev;
	92	dev->dev_offs = bus->dev_offs;
	93	dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */
	94
	95	dev_len = VIRTIO_DEV_OFFS_CONFIG;
	96	dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
	97	dev_len += dev->feat_len * 2;
	98	dev_len += vdev->config_len;
	99
	100	bus->dev_offs += dev_len;
	101
	102	virtio_bind_device(vdev, &virtio_s390_bindings, dev);
8172539d	103	dev->host_features = vdev->get_features(vdev, dev->host_features);
f3304eea AG	104	s390_virtio_device_sync(dev);
	105
	106	return 0;
	107	}
	108
	109	static int s390_virtio_net_init(VirtIOS390Device *dev)
	110	{
	111	VirtIODevice *vdev;
	112
	113	vdev = virtio_net_init((DeviceState *)dev, &dev->nic);
	114	if (!vdev) {
	115	return -1;
	116	}
	117
	118	return s390_virtio_device_init(dev, vdev);
	119	}
	120
	121	static int s390_virtio_blk_init(VirtIOS390Device *dev)
	122	{
	123	VirtIODevice *vdev;
	124
ad509737	125	vdev = virtio_blk_init((DeviceState *)dev, &dev->block);
f3304eea AG	126	if (!vdev) {
	127	return -1;
	128	}
	129
	130	return s390_virtio_device_init(dev, vdev);
	131	}
	132
98b19252	133	static int s390_virtio_serial_init(VirtIOS390Device *dev)
f3304eea AG	134	{
	135	VirtIOS390Bus *bus;
	136	VirtIODevice *vdev;
	137	int r;
	138
	139	bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	140
98b19252	141	vdev = virtio_serial_init((DeviceState *)dev, dev->max_virtserial_ports);
f3304eea AG	142	if (!vdev) {
	143	return -1;
	144	}
	145
	146	r = s390_virtio_device_init(dev, vdev);
	147	if (!r) {
	148	bus->console = dev;
	149	}
	150
	151	return r;
	152	}
	153
	154	static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
	155	{
	156	ram_addr_t token_off;
	157
	158	token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
	159	(vq * VIRTIO_VQCONFIG_LEN) +
	160	VIRTIO_VQCONFIG_OFFS_TOKEN;
	161
	162	return ldq_phys(token_off);
	163	}
	164
	165	static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
	166	{
	167	VirtIODevice *vdev = dev->vdev;
	168	int num_vq;
	169
	170	for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
	171	if (!virtio_queue_get_num(vdev, num_vq)) {
	172	break;
	173	}
	174	}
	175
	176	return num_vq;
	177	}
	178
	179	static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
	180	{
	181	ram_addr_t r = bus->next_ring;
	182
	183	bus->next_ring += VIRTIO_RING_LEN;
	184	return r;
	185	}
	186
baf0b55a	187	void s390_virtio_device_sync(VirtIOS390Device *dev)
f3304eea AG	188	{
	189	VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	190	ram_addr_t cur_offs;
	191	uint8_t num_vq;
	192	int i;
	193
	194	virtio_reset(dev->vdev);
	195
	196	/* Sync dev space */
	197	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);
	198
	199	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
	200	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);
	201
	202	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);
	203
	204	num_vq = s390_virtio_device_num_vq(dev);
	205	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);
	206
	207	/* Sync virtqueues */
	208	for (i = 0; i < num_vq; i++) {
	209	ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
	210	(i * VIRTIO_VQCONFIG_LEN);
	211	ram_addr_t vring;
	212
	213	vring = s390_virtio_next_ring(bus);
	214	virtio_queue_set_addr(dev->vdev, i, vring);
	215	virtio_queue_set_vector(dev->vdev, i, i);
	216	stq_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
	217	stw_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
	218	}
	219
	220	cur_offs = dev->dev_offs;
	221	cur_offs += VIRTIO_DEV_OFFS_CONFIG;
	222	cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
	223
	224	/* Sync feature bitmap */
8172539d	225	stl_phys(cur_offs, dev->host_features);
f3304eea AG	226
	227	dev->feat_offs = cur_offs + dev->feat_len;
	228	cur_offs += dev->feat_len * 2;
	229
	230	/* Sync config space */
	231	if (dev->vdev->get_config) {
	232	dev->vdev->get_config(dev->vdev, dev->vdev->config);
	233	}
	234
	235	cpu_physical_memory_rw(cur_offs, dev->vdev->config, dev->vdev->config_len, 1);
	236	cur_offs += dev->vdev->config_len;
	237	}
	238
	239	void s390_virtio_device_update_status(VirtIOS390Device *dev)
	240	{
	241	VirtIODevice *vdev = dev->vdev;
	242	uint32_t features;
	243
3e607cb5	244	virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));
f3304eea AG	245
	246	/* Update guest supported feature bitmap */
	247
	248	features = ldl_phys(dev->feat_offs);
	249	if (vdev->set_features) {
	250	vdev->set_features(vdev, features);
	251	}
704a76fc	252	vdev->guest_features = features;
f3304eea AG	253	}
	254
	255	VirtIOS390Device s390_virtio_bus_console(VirtIOS390Bus bus)
	256	{
	257	return bus->console;
	258	}
	259
	260	/* Find a device by vring address */
	261	VirtIOS390Device s390_virtio_bus_find_vring(VirtIOS390Bus bus,
	262	ram_addr_t mem,
	263	int *vq_num)
	264	{
	265	VirtIOS390Device *_dev;
	266	DeviceState *dev;
	267	int i;
	268
	269	QLIST_FOREACH(dev, &bus->bus.children, sibling) {
	270	_dev = (VirtIOS390Device *)dev;
	271	for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
	272	if (!virtio_queue_get_addr(_dev->vdev, i))
	273	break;
	274	if (virtio_queue_get_addr(_dev->vdev, i) == mem) {
	275	if (vq_num) {
	276	*vq_num = i;
	277	}
	278	return _dev;
	279	}
	280	}
	281	}
	282
	283	return NULL;
	284	}
	285
	286	/* Find a device by device descriptor location */
	287	VirtIOS390Device s390_virtio_bus_find_mem(VirtIOS390Bus bus, ram_addr_t mem)
	288	{
	289	VirtIOS390Device *_dev;
	290	DeviceState *dev;
	291
	292	QLIST_FOREACH(dev, &bus->bus.children, sibling) {
	293	_dev = (VirtIOS390Device *)dev;
	294	if (_dev->dev_offs == mem) {
	295	return _dev;
	296	}
	297	}
	298
	299	return NULL;
	300	}
	301
	302	static void virtio_s390_notify(void *opaque, uint16_t vector)
	303	{
	304	VirtIOS390Device dev = (VirtIOS390Device)opaque;
	305	uint64_t token = s390_virtio_device_vq_token(dev, vector);
	306
	307	/* XXX kvm dependency! */
86f3dba6	308	kvm_s390_virtio_irq(s390_cpu_addr2state(0), 0, token);
f3304eea AG	309	}
f3304eea AG	310
8172539d MT	311	static unsigned virtio_s390_get_features(void *opaque)
	312	{
	313	VirtIOS390Device dev = (VirtIOS390Device)opaque;
	314	return dev->host_features;
	315	}
	316
f3304eea AG	317	/************** S390 Virtio Bus Device Descriptions *****************/
	318
	319	static const VirtIOBindings virtio_s390_bindings = {
	320	.notify = virtio_s390_notify,
8172539d	321	.get_features = virtio_s390_get_features,
f3304eea AG	322	};
	323
	324	static VirtIOS390DeviceInfo s390_virtio_net = {
	325	.init = s390_virtio_net_init,
	326	.qdev.name = "virtio-net-s390",
	327	.qdev.size = sizeof(VirtIOS390Device),
	328	.qdev.props = (Property[]) {
	329	DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
	330	DEFINE_PROP_END_OF_LIST(),
	331	},
	332	};
	333
	334	static VirtIOS390DeviceInfo s390_virtio_blk = {
	335	.init = s390_virtio_blk_init,
	336	.qdev.name = "virtio-blk-s390",
	337	.qdev.size = sizeof(VirtIOS390Device),
	338	.qdev.props = (Property[]) {
428c149b	339	DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block),
f3304eea AG	340	DEFINE_PROP_END_OF_LIST(),
	341	},
	342	};
	343
98b19252 AS	344	static VirtIOS390DeviceInfo s390_virtio_serial = {
	345	.init = s390_virtio_serial_init,
	346	.qdev.name = "virtio-serial-s390",
	347	.qdev.alias = "virtio-serial",
f3304eea AG	348	.qdev.size = sizeof(VirtIOS390Device),
f3304eea AG	349	.qdev.props = (Property[]) {
98b19252 AS	350	DEFINE_PROP_UINT32("max_ports", VirtIOS390Device, max_virtserial_ports,
98b19252 AS	351	31),
f3304eea AG	352	DEFINE_PROP_END_OF_LIST(),
	353	},
	354	};
	355
	356	static int s390_virtio_busdev_init(DeviceState dev, DeviceInfo info)
	357	{
	358	VirtIOS390DeviceInfo _info = (VirtIOS390DeviceInfo )info;
	359	VirtIOS390Device _dev = (VirtIOS390Device )dev;
	360
	361	return _info->init(_dev);
	362	}
	363
	364	static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info)
	365	{
	366	info->qdev.init = s390_virtio_busdev_init;
	367	info->qdev.bus_info = &s390_virtio_bus_info;
	368
	369	assert(info->qdev.size >= sizeof(VirtIOS390Device));
	370	qdev_register(&info->qdev);
	371	}
	372
	373	static void s390_virtio_register(void)
	374	{
98b19252	375	s390_virtio_bus_register_withprop(&s390_virtio_serial);
f3304eea AG	376	s390_virtio_bus_register_withprop(&s390_virtio_blk);
	377	s390_virtio_bus_register_withprop(&s390_virtio_net);
	378	}
	379	device_init(s390_virtio_register);
	380
	381
	382	/*************** S390 Virtio Bus Bridge Device *****************/
	383	/* Only required to have the virtio bus as child in the system bus */
	384
	385	static int s390_virtio_bridge_init(SysBusDevice *dev)
	386	{
	387	/* nothing */
	388	return 0;
	389	}
	390
	391	static SysBusDeviceInfo s390_virtio_bridge_info = {
	392	.init = s390_virtio_bridge_init,
	393	.qdev.name = "s390-virtio-bridge",
	394	.qdev.size = sizeof(SysBusDevice),
	395	.qdev.no_user = 1,
	396	};
	397
	398	static void s390_virtio_register_devices(void)
	399	{
	400	sysbus_register_withprop(&s390_virtio_bridge_info);
	401	}
	402
	403	device_init(s390_virtio_register_devices)