[mirror_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-rng.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

static const TypeInfo s390_virtio_bus_info = {
    .name = TYPE_S390_VIRTIO_BUS,
    .parent = TYPE_BUS,
    .instance_size = sizeof(VirtIOS390Bus),
};

static const VirtIOBindings virtio_s390_bindings;

static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);

/* length of VirtIO device pages */
const hwaddr virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;

static void s390_virtio_bus_reset(void *opaque)
{
    VirtIOS390Bus *bus = opaque;
    bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
}

void s390_virtio_reset_idx(VirtIOS390Device *dev)
{
    int i;
    hwaddr idx_addr;
    uint8_t num_vq;

    num_vq = s390_virtio_device_num_vq(dev);
    for (i = 0; i < num_vq; i++) {
        idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
            VIRTIO_VRING_AVAIL_IDX_OFFS;
        stw_phys(idx_addr, 0);
        idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
            VIRTIO_VRING_USED_IDX_OFFS;
        stw_phys(idx_addr, 0);
    }
}

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(TYPE_S390_VIRTIO_BUS, 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;

    /* Enable hotplugging */
    _bus->allow_hotplug = 1;

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

    qemu_register_reset(s390_virtio_bus_reset, bus);
    return bus;
}

static void s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
{
    CPUS390XState *env = &cpu->env;

    if (kvm_enabled()) {
        kvm_s390_virtio_irq(cpu, config_change, token);
    } else {
        cpu_inject_ext(env, VIRTIO_EXT_CODE, config_change, token);
    }
}

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);
    s390_virtio_reset_idx(dev);
    if (dev->qdev.hotplugged) {
        S390CPU *cpu = s390_cpu_addr2state(0);
        s390_virtio_irq(cpu, VIRTIO_PARAM_DEV_ADD, dev->dev_offs);
    }

    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->blk);
    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 int s390_virtio_scsi_init(VirtIOS390Device *dev)
{
    VirtIODevice *vdev;

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

    return s390_virtio_device_init(dev, vdev);
}

static int s390_virtio_rng_init(VirtIOS390Device *dev)
{
    VirtIODevice *vdev;

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

    return s390_virtio_device_init(dev, vdev);
}

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_be_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_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
        stw_be_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_le_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_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_be_phys(dev->feat_offs));
    virtio_set_features(vdev, 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)
{
    BusChild *kid;
    int i;

    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;

        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)
{
    BusChild *kid;

    QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
        VirtIOS390Device *dev = (VirtIOS390Device *)kid->child;
        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);
    S390CPU *cpu = s390_cpu_addr2state(0);

    s390_virtio_irq(cpu, 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 Property s390_virtio_net_properties[] = {
    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 void s390_virtio_net_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);

    k->init = s390_virtio_net_init;
    dc->props = s390_virtio_net_properties;
}

static TypeInfo s390_virtio_net = {
    .name          = "virtio-net-s390",
    .parent        = TYPE_VIRTIO_S390_DEVICE,
    .instance_size = sizeof(VirtIOS390Device),
    .class_init    = s390_virtio_net_class_init,
};

static Property s390_virtio_blk_properties[] = {
    DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, blk.conf),
    DEFINE_BLOCK_CHS_PROPERTIES(VirtIOS390Device, blk.conf),
    DEFINE_PROP_STRING("serial", VirtIOS390Device, blk.serial),
#ifdef __linux__
    DEFINE_PROP_BIT("scsi", VirtIOS390Device, blk.scsi, 0, true),
#endif
    DEFINE_PROP_END_OF_LIST(),
};

static void s390_virtio_blk_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);

    k->init = s390_virtio_blk_init;
    dc->props = s390_virtio_blk_properties;
}

static TypeInfo s390_virtio_blk = {
    .name          = "virtio-blk-s390",
    .parent        = TYPE_VIRTIO_S390_DEVICE,
    .instance_size = sizeof(VirtIOS390Device),
    .class_init    = s390_virtio_blk_class_init,
};

static Property s390_virtio_serial_properties[] = {
    DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
                       serial.max_virtserial_ports, 31),
    DEFINE_PROP_END_OF_LIST(),
};

static void s390_virtio_serial_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);

    k->init = s390_virtio_serial_init;
    dc->props = s390_virtio_serial_properties;
}

static TypeInfo s390_virtio_serial = {
    .name          = "virtio-serial-s390",
    .parent        = TYPE_VIRTIO_S390_DEVICE,
    .instance_size = sizeof(VirtIOS390Device),
    .class_init    = s390_virtio_serial_class_init,
};

static void s390_virtio_rng_initfn(Object *obj)
{
    VirtIOS390Device *dev = VIRTIO_S390_DEVICE(obj);

    object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
                             (Object **)&dev->rng.rng, NULL);
}

static void s390_virtio_rng_class_init(ObjectClass *klass, void *data)
{
    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);

    k->init = s390_virtio_rng_init;
}

static TypeInfo s390_virtio_rng = {
    .name          = "virtio-rng-s390",
    .parent        = TYPE_VIRTIO_S390_DEVICE,
    .instance_size = sizeof(VirtIOS390Device),
    .instance_init = s390_virtio_rng_initfn,
    .class_init    = s390_virtio_rng_class_init,
};

static int s390_virtio_busdev_init(DeviceState *dev)
{
    VirtIOS390Device *_dev = (VirtIOS390Device *)dev;
    VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev);

    return _info->init(_dev);
}

static void virtio_s390_device_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->init = s390_virtio_busdev_init;
    dc->bus_type = TYPE_S390_VIRTIO_BUS;
    dc->unplug = qdev_simple_unplug_cb;
}

static TypeInfo virtio_s390_device_info = {
    .name = TYPE_VIRTIO_S390_DEVICE,
    .parent = TYPE_DEVICE,
    .instance_size = sizeof(VirtIOS390Device),
    .class_init = virtio_s390_device_class_init,
    .class_size = sizeof(VirtIOS390DeviceClass),
    .abstract = true,
};

static Property s390_virtio_scsi_properties[] = {
    DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOS390Device, host_features, scsi),
    DEFINE_PROP_END_OF_LIST(),
};

static void s390_virtio_scsi_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);

    k->init = s390_virtio_scsi_init;
    dc->props = s390_virtio_scsi_properties;
}

static TypeInfo s390_virtio_scsi = {
    .name          = "virtio-scsi-s390",
    .parent        = TYPE_VIRTIO_S390_DEVICE,
    .instance_size = sizeof(VirtIOS390Device),
    .class_init    = s390_virtio_scsi_class_init,
};

/***************** 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 void s390_virtio_bridge_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = s390_virtio_bridge_init;
    dc->no_user = 1;
}

static TypeInfo s390_virtio_bridge_info = {
    .name          = "s390-virtio-bridge",
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(SysBusDevice),
    .class_init    = s390_virtio_bridge_class_init,
};

static void s390_virtio_register_types(void)
{
    type_register_static(&s390_virtio_bus_info);
    type_register_static(&virtio_s390_device_info);
    type_register_static(&s390_virtio_serial);
    type_register_static(&s390_virtio_blk);
    type_register_static(&s390_virtio_net);
    type_register_static(&s390_virtio_scsi);
    type_register_static(&s390_virtio_rng);
    type_register_static(&s390_virtio_bridge_info);
}

type_init(s390_virtio_register_types)
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"
16c915ba	29	#include "hw/virtio-rng.h"
98b19252	30	#include "hw/virtio-serial.h"
f0c07c7c	31	#include "hw/virtio-net.h"
f3304eea AG	32	#include "hw/sysbus.h"
	33	#include "kvm.h"
	34
	35	#include "hw/s390-virtio-bus.h"
	36
	37	/* #define DEBUG_S390 */
	38
	39	#ifdef DEBUG_S390
	40	#define dprintf(fmt, ...) \
	41	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	42	#else
	43	#define dprintf(fmt, ...) \
	44	do { } while (0)
	45	#endif
	46
8103b4d1 AG	47	#define VIRTIO_EXT_CODE 0x2603
8103b4d1 AG	48
0d936928 AL	49	static const TypeInfo s390_virtio_bus_info = {
	50	.name = TYPE_S390_VIRTIO_BUS,
	51	.parent = TYPE_BUS,
	52	.instance_size = sizeof(VirtIOS390Bus),
f3304eea AG	53	};
f3304eea AG	54
f3304eea AG	55	static const VirtIOBindings virtio_s390_bindings;
	56
	57	static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
f3304eea	58
d1ff903c	59	/* length of VirtIO device pages */
a8170e5e	60	const hwaddr virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
d1ff903c	61
eb3caa44 JF	62	static void s390_virtio_bus_reset(void *opaque)
	63	{
	64	VirtIOS390Bus *bus = opaque;
	65	bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
	66	}
	67
4170aea1 JF	68	void s390_virtio_reset_idx(VirtIOS390Device *dev)
	69	{
	70	int i;
a8170e5e	71	hwaddr idx_addr;
4170aea1 JF	72	uint8_t num_vq;
	73
	74	num_vq = s390_virtio_device_num_vq(dev);
	75	for (i = 0; i < num_vq; i++) {
	76	idx_addr = virtio_queue_get_avail_addr(dev->vdev, i) +
	77	VIRTIO_VRING_AVAIL_IDX_OFFS;
	78	stw_phys(idx_addr, 0);
	79	idx_addr = virtio_queue_get_used_addr(dev->vdev, i) +
	80	VIRTIO_VRING_USED_IDX_OFFS;
	81	stw_phys(idx_addr, 0);
	82	}
	83	}
	84
f3304eea AG	85	VirtIOS390Bus s390_virtio_bus_init(ram_addr_t ram_size)
	86	{
	87	VirtIOS390Bus *bus;
	88	BusState *_bus;
	89	DeviceState *dev;
	90
	91	/* Create bridge device */
	92	dev = qdev_create(NULL, "s390-virtio-bridge");
	93	qdev_init_nofail(dev);
	94
	95	/* Create bus on bridge device */
	96
0d936928	97	_bus = qbus_create(TYPE_S390_VIRTIO_BUS, dev, "s390-virtio");
f3304eea AG	98	bus = DO_UPCAST(VirtIOS390Bus, bus, _bus);
	99
	100	bus->dev_page = *ram_size;
	101	bus->dev_offs = bus->dev_page;
	102	bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE;
	103
7fa41e53 AG	104	/* Enable hotplugging */
	105	_bus->allow_hotplug = 1;
	106
f3304eea AG	107	/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
	108	ram_size += S390_DEVICE_PAGES TARGET_PAGE_SIZE;
	109
eb3caa44	110	qemu_register_reset(s390_virtio_bus_reset, bus);
f3304eea AG	111	return bus;
	112	}
	113
1bc22652	114	static void s390_virtio_irq(S390CPU *cpu, int config_change, uint64_t token)
7fa41e53	115	{
1bc22652 AF	116	CPUS390XState *env = &cpu->env;
1bc22652 AF	117
7fa41e53	118	if (kvm_enabled()) {
1bc22652	119	kvm_s390_virtio_irq(cpu, config_change, token);
7fa41e53 AG	120	} else {
	121	cpu_inject_ext(env, VIRTIO_EXT_CODE, config_change, token);
	122	}
	123	}
	124
f3304eea AG	125	static int s390_virtio_device_init(VirtIOS390Device dev, VirtIODevice vdev)
	126	{
	127	VirtIOS390Bus *bus;
	128	int dev_len;
	129
	130	bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	131	dev->vdev = vdev;
	132	dev->dev_offs = bus->dev_offs;
	133	dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */
	134
	135	dev_len = VIRTIO_DEV_OFFS_CONFIG;
	136	dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN;
	137	dev_len += dev->feat_len * 2;
	138	dev_len += vdev->config_len;
	139
	140	bus->dev_offs += dev_len;
	141
	142	virtio_bind_device(vdev, &virtio_s390_bindings, dev);
8172539d	143	dev->host_features = vdev->get_features(vdev, dev->host_features);
f3304eea	144	s390_virtio_device_sync(dev);
4170aea1	145	s390_virtio_reset_idx(dev);
7fa41e53	146	if (dev->qdev.hotplugged) {
45fa769b	147	S390CPU *cpu = s390_cpu_addr2state(0);
1bc22652	148	s390_virtio_irq(cpu, VIRTIO_PARAM_DEV_ADD, dev->dev_offs);
7fa41e53 AG	149	}
7fa41e53 AG	150
f3304eea AG	151	return 0;
	152	}
	153
	154	static int s390_virtio_net_init(VirtIOS390Device *dev)
	155	{
	156	VirtIODevice *vdev;
	157
f0c07c7c	158	vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net);
f3304eea AG	159	if (!vdev) {
	160	return -1;
	161	}
	162
	163	return s390_virtio_device_init(dev, vdev);
	164	}
	165
	166	static int s390_virtio_blk_init(VirtIOS390Device *dev)
	167	{
	168	VirtIODevice *vdev;
	169
12c5674b	170	vdev = virtio_blk_init((DeviceState *)dev, &dev->blk);
f3304eea AG	171	if (!vdev) {
	172	return -1;
	173	}
	174
	175	return s390_virtio_device_init(dev, vdev);
	176	}
	177
98b19252	178	static int s390_virtio_serial_init(VirtIOS390Device *dev)
f3304eea AG	179	{
	180	VirtIOS390Bus *bus;
	181	VirtIODevice *vdev;
	182	int r;
	183
	184	bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	185
6be9b414	186	vdev = virtio_serial_init((DeviceState *)dev, &dev->serial);
f3304eea AG	187	if (!vdev) {
	188	return -1;
	189	}
	190
	191	r = s390_virtio_device_init(dev, vdev);
	192	if (!r) {
	193	bus->console = dev;
	194	}
	195
	196	return r;
	197	}
	198
973abc7f SH	199	static int s390_virtio_scsi_init(VirtIOS390Device *dev)
	200	{
	201	VirtIODevice *vdev;
	202
	203	vdev = virtio_scsi_init((DeviceState *)dev, &dev->scsi);
	204	if (!vdev) {
	205	return -1;
	206	}
	207
	208	return s390_virtio_device_init(dev, vdev);
	209	}
	210
16c915ba AS	211	static int s390_virtio_rng_init(VirtIOS390Device *dev)
	212	{
	213	VirtIODevice *vdev;
	214
	215	vdev = virtio_rng_init((DeviceState *)dev, &dev->rng);
	216	if (!vdev) {
	217	return -1;
	218	}
	219
	220	return s390_virtio_device_init(dev, vdev);
	221	}
	222
f3304eea AG	223	static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq)
	224	{
	225	ram_addr_t token_off;
	226
	227	token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
	228	(vq * VIRTIO_VQCONFIG_LEN) +
	229	VIRTIO_VQCONFIG_OFFS_TOKEN;
	230
04bc74ed	231	return ldq_be_phys(token_off);
f3304eea AG	232	}
	233
	234	static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
	235	{
	236	VirtIODevice *vdev = dev->vdev;
	237	int num_vq;
	238
	239	for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) {
	240	if (!virtio_queue_get_num(vdev, num_vq)) {
	241	break;
	242	}
	243	}
	244
	245	return num_vq;
	246	}
	247
	248	static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
	249	{
	250	ram_addr_t r = bus->next_ring;
	251
	252	bus->next_ring += VIRTIO_RING_LEN;
	253	return r;
	254	}
	255
baf0b55a	256	void s390_virtio_device_sync(VirtIOS390Device *dev)
f3304eea AG	257	{
	258	VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus);
	259	ram_addr_t cur_offs;
	260	uint8_t num_vq;
	261	int i;
	262
	263	virtio_reset(dev->vdev);
	264
	265	/* Sync dev space */
	266	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id);
	267
	268	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev));
	269	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len);
	270
	271	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len);
	272
	273	num_vq = s390_virtio_device_num_vq(dev);
	274	stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq);
	275
	276	/* Sync virtqueues */
	277	for (i = 0; i < num_vq; i++) {
	278	ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) +
	279	(i * VIRTIO_VQCONFIG_LEN);
	280	ram_addr_t vring;
	281
	282	vring = s390_virtio_next_ring(bus);
	283	virtio_queue_set_addr(dev->vdev, i, vring);
	284	virtio_queue_set_vector(dev->vdev, i, i);
04bc74ed AG	285	stq_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring);
04bc74ed AG	286	stw_be_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i));
f3304eea AG	287	}
	288
	289	cur_offs = dev->dev_offs;
	290	cur_offs += VIRTIO_DEV_OFFS_CONFIG;
	291	cur_offs += num_vq * VIRTIO_VQCONFIG_LEN;
	292
	293	/* Sync feature bitmap */
04bc74ed	294	stl_le_phys(cur_offs, dev->host_features);
f3304eea AG	295
	296	dev->feat_offs = cur_offs + dev->feat_len;
	297	cur_offs += dev->feat_len * 2;
	298
	299	/* Sync config space */
	300	if (dev->vdev->get_config) {
	301	dev->vdev->get_config(dev->vdev, dev->vdev->config);
	302	}
	303
54f7b4a3 SW	304	cpu_physical_memory_write(cur_offs,
54f7b4a3 SW	305	dev->vdev->config, dev->vdev->config_len);
f3304eea AG	306	cur_offs += dev->vdev->config_len;
	307	}
	308
	309	void s390_virtio_device_update_status(VirtIOS390Device *dev)
	310	{
	311	VirtIODevice *vdev = dev->vdev;
	312	uint32_t features;
	313
3e607cb5	314	virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS));
f3304eea AG	315
	316	/* Update guest supported feature bitmap */
	317
04bc74ed	318	features = bswap32(ldl_be_phys(dev->feat_offs));
ad0c9332	319	virtio_set_features(vdev, features);
f3304eea AG	320	}
	321
	322	VirtIOS390Device s390_virtio_bus_console(VirtIOS390Bus bus)
	323	{
	324	return bus->console;
	325	}
	326
	327	/* Find a device by vring address */
	328	VirtIOS390Device s390_virtio_bus_find_vring(VirtIOS390Bus bus,
	329	ram_addr_t mem,
	330	int *vq_num)
	331	{
0866aca1	332	BusChild *kid;
f3304eea AG	333	int i;
f3304eea AG	334
0866aca1 AL	335	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
	336	VirtIOS390Device dev = (VirtIOS390Device )kid->child;
	337
f3304eea	338	for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
0866aca1	339	if (!virtio_queue_get_addr(dev->vdev, i))
f3304eea	340	break;
0866aca1	341	if (virtio_queue_get_addr(dev->vdev, i) == mem) {
f3304eea AG	342	if (vq_num) {
	343	*vq_num = i;
	344	}
0866aca1	345	return dev;
f3304eea AG	346	}
	347	}
	348	}
	349
	350	return NULL;
	351	}
	352
	353	/* Find a device by device descriptor location */
	354	VirtIOS390Device s390_virtio_bus_find_mem(VirtIOS390Bus bus, ram_addr_t mem)
	355	{
0866aca1	356	BusChild *kid;
f3304eea	357
0866aca1 AL	358	QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
	359	VirtIOS390Device dev = (VirtIOS390Device )kid->child;
	360	if (dev->dev_offs == mem) {
	361	return dev;
f3304eea AG	362	}
	363	}
	364
	365	return NULL;
	366	}
	367
	368	static void virtio_s390_notify(void *opaque, uint16_t vector)
	369	{
	370	VirtIOS390Device dev = (VirtIOS390Device)opaque;
	371	uint64_t token = s390_virtio_device_vq_token(dev, vector);
45fa769b	372	S390CPU *cpu = s390_cpu_addr2state(0);
f3304eea	373
1bc22652	374	s390_virtio_irq(cpu, 0, token);
f3304eea AG	375	}
f3304eea AG	376
8172539d MT	377	static unsigned virtio_s390_get_features(void *opaque)
	378	{
	379	VirtIOS390Device dev = (VirtIOS390Device)opaque;
	380	return dev->host_features;
	381	}
	382
f3304eea AG	383	/************** S390 Virtio Bus Device Descriptions *****************/
	384
	385	static const VirtIOBindings virtio_s390_bindings = {
	386	.notify = virtio_s390_notify,
8172539d	387	.get_features = virtio_s390_get_features,
f3304eea AG	388	};
f3304eea AG	389
39bffca2 AL	390	static Property s390_virtio_net_properties[] = {
	391	DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic),
	392	DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
	393	net.txtimer, TX_TIMER_INTERVAL),
	394	DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
	395	net.txburst, TX_BURST),
	396	DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
	397	DEFINE_PROP_END_OF_LIST(),
	398	};
	399
19b6914a AL	400	static void s390_virtio_net_class_init(ObjectClass klass, void data)
19b6914a AL	401	{
39bffca2 AL	402	DeviceClass *dc = DEVICE_CLASS(klass);
39bffca2 AL	403	VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
19b6914a	404
39bffca2 AL	405	k->init = s390_virtio_net_init;
39bffca2 AL	406	dc->props = s390_virtio_net_properties;
19b6914a AL	407	}
19b6914a AL	408
39bffca2 AL	409	static TypeInfo s390_virtio_net = {
	410	.name = "virtio-net-s390",
	411	.parent = TYPE_VIRTIO_S390_DEVICE,
	412	.instance_size = sizeof(VirtIOS390Device),
	413	.class_init = s390_virtio_net_class_init,
	414	};
	415
	416	static Property s390_virtio_blk_properties[] = {
12c5674b	417	DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, blk.conf),
e63e7fde	418	DEFINE_BLOCK_CHS_PROPERTIES(VirtIOS390Device, blk.conf),
12c5674b	419	DEFINE_PROP_STRING("serial", VirtIOS390Device, blk.serial),
a6c5c84a PB	420	#ifdef __linux__
	421	DEFINE_PROP_BIT("scsi", VirtIOS390Device, blk.scsi, 0, true),
	422	#endif
39bffca2	423	DEFINE_PROP_END_OF_LIST(),
f3304eea AG	424	};
f3304eea AG	425
19b6914a AL	426	static void s390_virtio_blk_class_init(ObjectClass klass, void data)
19b6914a AL	427	{
39bffca2 AL	428	DeviceClass *dc = DEVICE_CLASS(klass);
39bffca2 AL	429	VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
19b6914a	430
39bffca2 AL	431	k->init = s390_virtio_blk_init;
39bffca2 AL	432	dc->props = s390_virtio_blk_properties;
19b6914a AL	433	}
19b6914a AL	434
39bffca2 AL	435	static TypeInfo s390_virtio_blk = {
	436	.name = "virtio-blk-s390",
	437	.parent = TYPE_VIRTIO_S390_DEVICE,
	438	.instance_size = sizeof(VirtIOS390Device),
	439	.class_init = s390_virtio_blk_class_init,
	440	};
	441
	442	static Property s390_virtio_serial_properties[] = {
	443	DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
	444	serial.max_virtserial_ports, 31),
	445	DEFINE_PROP_END_OF_LIST(),
f3304eea AG	446	};
f3304eea AG	447
19b6914a AL	448	static void s390_virtio_serial_class_init(ObjectClass klass, void data)
19b6914a AL	449	{
39bffca2 AL	450	DeviceClass *dc = DEVICE_CLASS(klass);
39bffca2 AL	451	VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
19b6914a	452
39bffca2 AL	453	k->init = s390_virtio_serial_init;
39bffca2 AL	454	dc->props = s390_virtio_serial_properties;
19b6914a AL	455	}
19b6914a AL	456
39bffca2 AL	457	static TypeInfo s390_virtio_serial = {
	458	.name = "virtio-serial-s390",
	459	.parent = TYPE_VIRTIO_S390_DEVICE,
	460	.instance_size = sizeof(VirtIOS390Device),
	461	.class_init = s390_virtio_serial_class_init,
f3304eea AG	462	};
f3304eea AG	463
16c915ba AS	464	static void s390_virtio_rng_initfn(Object *obj)
	465	{
	466	VirtIOS390Device *dev = VIRTIO_S390_DEVICE(obj);
	467
	468	object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
	469	(Object **)&dev->rng.rng, NULL);
	470	}
	471
	472	static void s390_virtio_rng_class_init(ObjectClass klass, void data)
	473	{
	474	VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
	475
	476	k->init = s390_virtio_rng_init;
	477	}
	478
	479	static TypeInfo s390_virtio_rng = {
	480	.name = "virtio-rng-s390",
	481	.parent = TYPE_VIRTIO_S390_DEVICE,
	482	.instance_size = sizeof(VirtIOS390Device),
	483	.instance_init = s390_virtio_rng_initfn,
	484	.class_init = s390_virtio_rng_class_init,
	485	};
	486
d307af79	487	static int s390_virtio_busdev_init(DeviceState *dev)
f3304eea	488	{
f3304eea	489	VirtIOS390Device _dev = (VirtIOS390Device )dev;
19b6914a	490	VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev);
f3304eea AG	491
	492	return _info->init(_dev);
	493	}
	494
39bffca2	495	static void virtio_s390_device_class_init(ObjectClass klass, void data)
f3304eea	496	{
39bffca2	497	DeviceClass *dc = DEVICE_CLASS(klass);
f3304eea	498
39bffca2	499	dc->init = s390_virtio_busdev_init;
0d936928	500	dc->bus_type = TYPE_S390_VIRTIO_BUS;
39bffca2	501	dc->unplug = qdev_simple_unplug_cb;
f3304eea AG	502	}
f3304eea AG	503
19b6914a AL	504	static TypeInfo virtio_s390_device_info = {
	505	.name = TYPE_VIRTIO_S390_DEVICE,
	506	.parent = TYPE_DEVICE,
	507	.instance_size = sizeof(VirtIOS390Device),
39bffca2	508	.class_init = virtio_s390_device_class_init,
e87f7fc6	509	.class_size = sizeof(VirtIOS390DeviceClass),
19b6914a AL	510	.abstract = true,
	511	};
	512
973abc7f SH	513	static Property s390_virtio_scsi_properties[] = {
	514	DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOS390Device, host_features, scsi),
	515	DEFINE_PROP_END_OF_LIST(),
	516	};
	517
	518	static void s390_virtio_scsi_class_init(ObjectClass klass, void data)
	519	{
	520	DeviceClass *dc = DEVICE_CLASS(klass);
	521	VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass);
	522
	523	k->init = s390_virtio_scsi_init;
	524	dc->props = s390_virtio_scsi_properties;
	525	}
	526
	527	static TypeInfo s390_virtio_scsi = {
	528	.name = "virtio-scsi-s390",
	529	.parent = TYPE_VIRTIO_S390_DEVICE,
	530	.instance_size = sizeof(VirtIOS390Device),
	531	.class_init = s390_virtio_scsi_class_init,
	532	};
f3304eea AG	533
	534	/*************** S390 Virtio Bus Bridge Device *****************/
	535	/* Only required to have the virtio bus as child in the system bus */
	536
	537	static int s390_virtio_bridge_init(SysBusDevice *dev)
	538	{
	539	/* nothing */
	540	return 0;
	541	}
	542
999e12bb AL	543	static void s390_virtio_bridge_class_init(ObjectClass klass, void data)
999e12bb AL	544	{
39bffca2	545	DeviceClass *dc = DEVICE_CLASS(klass);
999e12bb AL	546	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
	547
	548	k->init = s390_virtio_bridge_init;
39bffca2	549	dc->no_user = 1;
999e12bb AL	550	}
999e12bb AL	551
39bffca2 AL	552	static TypeInfo s390_virtio_bridge_info = {
	553	.name = "s390-virtio-bridge",
	554	.parent = TYPE_SYS_BUS_DEVICE,
	555	.instance_size = sizeof(SysBusDevice),
	556	.class_init = s390_virtio_bridge_class_init,
f3304eea AG	557	};
f3304eea AG	558
83f7d43a	559	static void s390_virtio_register_types(void)
f3304eea	560	{
0d936928	561	type_register_static(&s390_virtio_bus_info);
83f7d43a AF	562	type_register_static(&virtio_s390_device_info);
	563	type_register_static(&s390_virtio_serial);
	564	type_register_static(&s390_virtio_blk);
	565	type_register_static(&s390_virtio_net);
973abc7f	566	type_register_static(&s390_virtio_scsi);
16c915ba	567	type_register_static(&s390_virtio_rng);
39bffca2	568	type_register_static(&s390_virtio_bridge_info);
f3304eea AG	569	}
f3304eea AG	570
83f7d43a	571	type_init(s390_virtio_register_types)