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qemu/hw/s390-virtio-bus.c

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/*
* 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/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),
};
static const VirtIOBindings virtio_s390_bindings;
static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
/* length of VirtIO device pages */
const target_phys_addr_t virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
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;
/* Enable hotplugging */
_bus->allow_hotplug = 1;
/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
*ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE;
return bus;
}
static void s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
{
if (kvm_enabled()) {
kvm_s390_virtio_irq(env, 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);
if (dev->qdev.hotplugged) {
CPUState *env = s390_cpu_addr2state(0);
s390_virtio_irq(env, 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->block,
&dev->block_serial);
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_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)
{
VirtIOS390Device *_dev;
DeviceState *dev;
int i;
QTAILQ_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;
QTAILQ_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);
s390_virtio_irq(env, 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, block),
DEFINE_PROP_STRING("serial", VirtIOS390Device, block_serial),
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 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_info = &s390_virtio_bus_info;
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 void s390_virtio_register(void)
{
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);
}
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 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_devices(void)
{
type_register_static(&s390_virtio_bridge_info);
}
device_init(s390_virtio_register_devices)
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