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

/*
 * QEMU S390 virtio target
 *
 * Copyright (c) 2009 Alexander Graf <[email protected]>
 *
 * 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/virtio-net.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

#define VIRTIO_EXT_CODE   0x2603

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, &dev->net);
    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->serial);
    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, bswap32(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_write(cur_offs,
                              dev->vdev->config, dev->vdev->config_len);
    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 = bswap32(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);
    CPUState *env = s390_cpu_addr2state(0);

    if (kvm_enabled()) {
        kvm_s390_virtio_irq(env, 0, token);
    } else {
        cpu_inject_ext(env, VIRTIO_EXT_CODE, 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.alias = "virtio-net",
    .qdev.size = sizeof(VirtIOS390Device),
    .qdev.props = (Property[]) {
        DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
        DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
                           net.txtimer, TX_TIMER_INTERVAL),
        DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
                          net.txburst, TX_BURST),
        DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
        DEFINE_PROP_END_OF_LIST(),
    },
};

static VirtIOS390DeviceInfo s390_virtio_blk = {
    .init = s390_virtio_blk_init,
    .qdev.name = "virtio-blk-s390",
    .qdev.alias = "virtio-blk",
    .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,
                           serial.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 <[email protected]>
	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"
f0c07c7c	30	#include "hw/virtio-net.h"
f3304eea AG	31	#include "hw/sysbus.h"
	32	#include "kvm.h"
	33
	34	#include "hw/s390-virtio-bus.h"
	35
	36	/* #define DEBUG_S390 */
	37
	38	#ifdef DEBUG_S390
	39	#define dprintf(fmt, ...) \
	40	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	41	#else
	42	#define dprintf(fmt, ...) \
	43	do { } while (0)
	44	#endif
	45
8103b4d1 AG	46	#define VIRTIO_EXT_CODE 0x2603
8103b4d1 AG	47
f3304eea AG	48	struct BusInfo s390_virtio_bus_info = {
	49	.name = "s390-virtio",
	50	.size = sizeof(VirtIOS390Bus),
	51	};
	52
	53	typedef struct {
	54	DeviceInfo qdev;
	55	int (init)(VirtIOS390Device dev);
	56	} VirtIOS390DeviceInfo;
	57
	58
	59	static const VirtIOBindings virtio_s390_bindings;
	60
	61	static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
f3304eea AG	62
	63	VirtIOS390Bus s390_virtio_bus_init(ram_addr_t ram_size)
	64	{
	65	VirtIOS390Bus *bus;
	66	BusState *_bus;
	67	DeviceState *dev;
	68
	69	/* Create bridge device */
	70	dev = qdev_create(NULL, "s390-virtio-bridge");
	71	qdev_init_nofail(dev);
	72
	73	/* Create bus on bridge device */
	74
	75	_bus = qbus_create(&s390_virtio_bus_info, dev, "s390-virtio");
	76	bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);
	77
	78	bus->dev_page = *ram_size;
	79	bus->dev_offs = bus->dev_page;
	80	bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
	81
	82	/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
	83	ram_size += S390_DEVICE_PAGES TARGET_PAGE_SIZE;
	84
	85	return bus;
	86	}
	87
	88	static int s390_virtio_device_init(VirtIOS390Device dev, VirtIODevice vdev)
	89	{
	90	VirtIOS390Bus *bus;
	91	int dev_len;
	92
	93	bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	94	dev->vdev = vdev;
	95	dev->dev_offs = bus->dev_offs;
	96	dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */
	97
	98	dev_len = VIRTIO_DEV_OFFS_CONFIG;
	99	dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
	100	dev_len += dev->feat_len * 2;
	101	dev_len += vdev->config_len;
	102
	103	bus->dev_offs += dev_len;
	104
	105	virtio_bind_device(vdev, &virtio_s390_bindings, dev);
8172539d	106	dev->host_features = vdev->get_features(vdev, dev->host_features);
f3304eea AG	107	s390_virtio_device_sync(dev);
	108
	109	return 0;
	110	}
	111
	112	static int s390_virtio_net_init(VirtIOS390Device *dev)
	113	{
	114	VirtIODevice *vdev;
	115
f0c07c7c	116	vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net);
f3304eea AG	117	if (!vdev) {
	118	return -1;
	119	}
	120
	121	return s390_virtio_device_init(dev, vdev);
	122	}
	123
	124	static int s390_virtio_blk_init(VirtIOS390Device *dev)
	125	{
	126	VirtIODevice *vdev;
	127
ad509737	128	vdev = virtio_blk_init((DeviceState *)dev, &dev->block);
f3304eea AG	129	if (!vdev) {
	130	return -1;
	131	}
	132
	133	return s390_virtio_device_init(dev, vdev);
	134	}
	135
98b19252	136	static int s390_virtio_serial_init(VirtIOS390Device *dev)
f3304eea AG	137	{
	138	VirtIOS390Bus *bus;
	139	VirtIODevice *vdev;
	140	int r;
	141
	142	bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	143
6be9b414	144	vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
f3304eea AG	145	if (!vdev) {
	146	return -1;
	147	}
	148
	149	r = s390_virtio_device_init(dev, vdev);
	150	if (!r) {
	151	bus->console = dev;
	152	}
	153
	154	return r;
	155	}
	156
	157	static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
	158	{
	159	ram_addr_t token_off;
	160
	161	token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
	162	(vq * VIRTIO_VQCONFIG_LEN) +
	163	VIRTIO_VQCONFIG_OFFS_TOKEN;
	164
	165	return ldq_phys(token_off);
	166	}
	167
	168	static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
	169	{
	170	VirtIODevice *vdev = dev->vdev;
	171	int num_vq;
	172
	173	for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
	174	if (!virtio_queue_get_num(vdev, num_vq)) {
	175	break;
	176	}
	177	}
	178
	179	return num_vq;
	180	}
	181
	182	static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
	183	{
	184	ram_addr_t r = bus->next_ring;
	185
	186	bus->next_ring += VIRTIO_RING_LEN;
	187	return r;
	188	}
	189
baf0b55a	190	void s390_virtio_device_sync(VirtIOS390Device *dev)
f3304eea AG	191	{
	192	VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	193	ram_addr_t cur_offs;
	194	uint8_t num_vq;
	195	int i;
	196
	197	virtio_reset(dev->vdev);
	198
	199	/* Sync dev space */
	200	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);
	201
	202	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
	203	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);
	204
	205	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);
	206
	207	num_vq = s390_virtio_device_num_vq(dev);
	208	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);
	209
	210	/* Sync virtqueues */
	211	for (i = 0; i < num_vq; i++) {
	212	ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
	213	(i * VIRTIO_VQCONFIG_LEN);
	214	ram_addr_t vring;
	215
	216	vring = s390_virtio_next_ring(bus);
	217	virtio_queue_set_addr(dev->vdev, i, vring);
	218	virtio_queue_set_vector(dev->vdev, i, i);
	219	stq_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
	220	stw_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
	221	}
	222
	223	cur_offs = dev->dev_offs;
	224	cur_offs += VIRTIO_DEV_OFFS_CONFIG;
	225	cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
	226
	227	/* Sync feature bitmap */
8f16753f	228	stl_phys(cur_offs, bswap32(dev->host_features));
f3304eea AG	229
	230	dev->feat_offs = cur_offs + dev->feat_len;
	231	cur_offs += dev->feat_len * 2;
	232
	233	/* Sync config space */
	234	if (dev->vdev->get_config) {
	235	dev->vdev->get_config(dev->vdev, dev->vdev->config);
	236	}
	237
54f7b4a3 SW	238	cpu_physical_memory_write(cur_offs,
54f7b4a3 SW	239	dev->vdev->config, dev->vdev->config_len);
f3304eea AG	240	cur_offs += dev->vdev->config_len;
	241	}
	242
	243	void s390_virtio_device_update_status(VirtIOS390Device *dev)
	244	{
	245	VirtIODevice *vdev = dev->vdev;
	246	uint32_t features;
	247
3e607cb5	248	virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));
f3304eea AG	249
	250	/* Update guest supported feature bitmap */
	251
8f16753f	252	features = bswap32(ldl_phys(dev->feat_offs));
f3304eea AG	253	if (vdev->set_features) {
	254	vdev->set_features(vdev, features);
	255	}
704a76fc	256	vdev->guest_features = features;
f3304eea AG	257	}
	258
	259	VirtIOS390Device s390_virtio_bus_console(VirtIOS390Bus bus)
	260	{
	261	return bus->console;
	262	}
	263
	264	/* Find a device by vring address */
	265	VirtIOS390Device s390_virtio_bus_find_vring(VirtIOS390Bus bus,
	266	ram_addr_t mem,
	267	int *vq_num)
	268	{
	269	VirtIOS390Device *_dev;
	270	DeviceState *dev;
	271	int i;
	272
	273	QLIST_FOREACH(dev, &bus->bus.children, sibling) {
	274	_dev = (VirtIOS390Device *)dev;
	275	for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
	276	if (!virtio_queue_get_addr(_dev->vdev, i))
	277	break;
	278	if (virtio_queue_get_addr(_dev->vdev, i) == mem) {
	279	if (vq_num) {
	280	*vq_num = i;
	281	}
	282	return _dev;
	283	}
	284	}
	285	}
	286
	287	return NULL;
	288	}
	289
	290	/* Find a device by device descriptor location */
	291	VirtIOS390Device s390_virtio_bus_find_mem(VirtIOS390Bus bus, ram_addr_t mem)
	292	{
	293	VirtIOS390Device *_dev;
	294	DeviceState *dev;
	295
	296	QLIST_FOREACH(dev, &bus->bus.children, sibling) {
	297	_dev = (VirtIOS390Device *)dev;
	298	if (_dev->dev_offs == mem) {
	299	return _dev;
	300	}
	301	}
	302
	303	return NULL;
	304	}
	305
	306	static void virtio_s390_notify(void *opaque, uint16_t vector)
	307	{
	308	VirtIOS390Device dev = (VirtIOS390Device)opaque;
	309	uint64_t token = s390_virtio_device_vq_token(dev, vector);
8103b4d1	310	CPUState *env = s390_cpu_addr2state(0);
f3304eea	311
8103b4d1 AG	312	if (kvm_enabled()) {
	313	kvm_s390_virtio_irq(env, 0, token);
	314	} else {
	315	cpu_inject_ext(env, VIRTIO_EXT_CODE, 0, token);
	316	}
f3304eea AG	317	}
f3304eea AG	318
8172539d MT	319	static unsigned virtio_s390_get_features(void *opaque)
	320	{
	321	VirtIOS390Device dev = (VirtIOS390Device)opaque;
	322	return dev->host_features;
	323	}
	324
f3304eea AG	325	/************** S390 Virtio Bus Device Descriptions *****************/
	326
	327	static const VirtIOBindings virtio_s390_bindings = {
	328	.notify = virtio_s390_notify,
8172539d	329	.get_features = virtio_s390_get_features,
f3304eea AG	330	};
	331
	332	static VirtIOS390DeviceInfo s390_virtio_net = {
	333	.init = s390_virtio_net_init,
	334	.qdev.name = "virtio-net-s390",
29f82b37	335	.qdev.alias = "virtio-net",
f3304eea AG	336	.qdev.size = sizeof(VirtIOS390Device),
	337	.qdev.props = (Property[]) {
	338	DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
f0c07c7c AW	339	DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
f0c07c7c AW	340	net.txtimer, TX_TIMER_INTERVAL),
e3f30488 AW	341	DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
e3f30488 AW	342	net.txburst, TX_BURST),
a697a334	343	DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
f3304eea AG	344	DEFINE_PROP_END_OF_LIST(),
	345	},
	346	};
	347
	348	static VirtIOS390DeviceInfo s390_virtio_blk = {
	349	.init = s390_virtio_blk_init,
	350	.qdev.name = "virtio-blk-s390",
29f82b37	351	.qdev.alias = "virtio-blk",
f3304eea AG	352	.qdev.size = sizeof(VirtIOS390Device),
f3304eea AG	353	.qdev.props = (Property[]) {
428c149b	354	DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block),
f3304eea AG	355	DEFINE_PROP_END_OF_LIST(),
	356	},
	357	};
	358
98b19252 AS	359	static VirtIOS390DeviceInfo s390_virtio_serial = {
	360	.init = s390_virtio_serial_init,
	361	.qdev.name = "virtio-serial-s390",
	362	.qdev.alias = "virtio-serial",
f3304eea AG	363	.qdev.size = sizeof(VirtIOS390Device),
f3304eea AG	364	.qdev.props = (Property[]) {
6be9b414 AG	365	DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
6be9b414 AG	366	serial.max_virtserial_ports, 31),
f3304eea AG	367	DEFINE_PROP_END_OF_LIST(),
	368	},
	369	};
	370
	371	static int s390_virtio_busdev_init(DeviceState dev, DeviceInfo info)
	372	{
	373	VirtIOS390DeviceInfo _info = (VirtIOS390DeviceInfo )info;
	374	VirtIOS390Device _dev = (VirtIOS390Device )dev;
	375
	376	return _info->init(_dev);
	377	}
	378
	379	static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info)
	380	{
	381	info->qdev.init = s390_virtio_busdev_init;
	382	info->qdev.bus_info = &s390_virtio_bus_info;
	383
	384	assert(info->qdev.size >= sizeof(VirtIOS390Device));
	385	qdev_register(&info->qdev);
	386	}
	387
	388	static void s390_virtio_register(void)
	389	{
98b19252	390	s390_virtio_bus_register_withprop(&s390_virtio_serial);
f3304eea AG	391	s390_virtio_bus_register_withprop(&s390_virtio_blk);
	392	s390_virtio_bus_register_withprop(&s390_virtio_net);
	393	}
	394	device_init(s390_virtio_register);
	395
	396
	397	/*************** S390 Virtio Bus Bridge Device *****************/
	398	/* Only required to have the virtio bus as child in the system bus */
	399
	400	static int s390_virtio_bridge_init(SysBusDevice *dev)
	401	{
	402	/* nothing */
	403	return 0;
	404	}
	405
	406	static SysBusDeviceInfo s390_virtio_bridge_info = {
	407	.init = s390_virtio_bridge_init,
	408	.qdev.name = "s390-virtio-bridge",
	409	.qdev.size = sizeof(SysBusDevice),
	410	.qdev.no_user = 1,
	411	};
	412
	413	static void s390_virtio_register_devices(void)
	414	{
	415	sysbus_register_withprop(&s390_virtio_bridge_info);
	416	}
	417
	418	device_init(s390_virtio_register_devices)