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qemu-irix/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/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)
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