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qemu/hw/s390x/virtio-ccw.c
Cornelia Huck 320ce8503b virtio-ccw: Wire up guest and host notifies. 
Guest and host notifiers are needed by vhost. We use ioeventfds for
the guest notifiers, but need to fall back on qemu injecting interrupts
for the host notifiers.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2013-06-25 17:11:12 +02:00

1342 lines
41 KiB
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/*
* virtio ccw target implementation
*
* Copyright 2012 IBM Corp.
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#include "hw/hw.h"
#include "block/block.h"
#include "sysemu/blockdev.h"
#include "sysemu/sysemu.h"
#include "net/net.h"
#include "monitor/monitor.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-serial.h"
#include "hw/virtio/virtio-net.h"
#include "hw/sysbus.h"
#include "qemu/bitops.h"
#include "hw/virtio/virtio-bus.h"
#include "ioinst.h"
#include "css.h"
#include "virtio-ccw.h"
#include "trace.h"
static void virtio_ccw_bus_new(VirtioBusState *bus, VirtioCcwDevice *dev);
static int virtual_css_bus_reset(BusState *qbus)
{
/* This should actually be modelled via the generic css */
css_reset();
/* we dont traverse ourself, return 0 */
return 0;
}
static void virtual_css_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
k->reset = virtual_css_bus_reset;
}
static const TypeInfo virtual_css_bus_info = {
.name = TYPE_VIRTUAL_CSS_BUS,
.parent = TYPE_BUS,
.instance_size = sizeof(VirtualCssBus),
.class_init = virtual_css_bus_class_init,
};
VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
{
VirtIODevice *vdev = NULL;
if (sch->driver_data) {
vdev = ((VirtioCcwDevice *)sch->driver_data)->vdev;
}
return vdev;
}
static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
bool assign, bool set_handler)
{
VirtQueue *vq = virtio_get_queue(dev->vdev, n);
EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
int r = 0;
SubchDev *sch = dev->sch;
uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
if (assign) {
r = event_notifier_init(notifier, 1);
if (r < 0) {
error_report("%s: unable to init event notifier: %d", __func__, r);
return r;
}
virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
r = s390_assign_subch_ioeventfd(event_notifier_get_fd(notifier), sch_id,
n, assign);
if (r < 0) {
error_report("%s: unable to assign ioeventfd: %d", __func__, r);
virtio_queue_set_host_notifier_fd_handler(vq, false, false);
event_notifier_cleanup(notifier);
return r;
}
} else {
virtio_queue_set_host_notifier_fd_handler(vq, false, false);
s390_assign_subch_ioeventfd(event_notifier_get_fd(notifier), sch_id,
n, assign);
event_notifier_cleanup(notifier);
}
return r;
}
static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
{
int n, r;
if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
dev->ioeventfd_disabled ||
dev->ioeventfd_started) {
return;
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
if (!virtio_queue_get_num(dev->vdev, n)) {
continue;
}
r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
if (r < 0) {
goto assign_error;
}
}
dev->ioeventfd_started = true;
return;
assign_error:
while (--n >= 0) {
if (!virtio_queue_get_num(dev->vdev, n)) {
continue;
}
r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
assert(r >= 0);
}
dev->ioeventfd_started = false;
/* Disable ioeventfd for this device. */
dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
error_report("%s: failed. Fallback to userspace (slower).", __func__);
}
static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
{
int n, r;
if (!dev->ioeventfd_started) {
return;
}
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
if (!virtio_queue_get_num(dev->vdev, n)) {
continue;
}
r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
assert(r >= 0);
}
dev->ioeventfd_started = false;
}
VirtualCssBus *virtual_css_bus_init(void)
{
VirtualCssBus *cbus;
BusState *bus;
DeviceState *dev;
/* Create bridge device */
dev = qdev_create(NULL, "virtual-css-bridge");
qdev_init_nofail(dev);
/* Create bus on bridge device */
bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
cbus = VIRTUAL_CSS_BUS(bus);
/* Enable hotplugging */
bus->allow_hotplug = 1;
return cbus;
}
/* Communication blocks used by several channel commands. */
typedef struct VqInfoBlock {
uint64_t queue;
uint32_t align;
uint16_t index;
uint16_t num;
} QEMU_PACKED VqInfoBlock;
typedef struct VqConfigBlock {
uint16_t index;
uint16_t num_max;
} QEMU_PACKED VqConfigBlock;
typedef struct VirtioFeatDesc {
uint32_t features;
uint8_t index;
} QEMU_PACKED VirtioFeatDesc;
/* Specify where the virtqueues for the subchannel are in guest memory. */
static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
uint16_t index, uint16_t num)
{
VirtioCcwDevice *dev = sch->driver_data;
if (index > VIRTIO_PCI_QUEUE_MAX) {
return -EINVAL;
}
/* Current code in virtio.c relies on 4K alignment. */
if (addr && (align != 4096)) {
return -EINVAL;
}
if (!dev) {
return -EINVAL;
}
virtio_queue_set_addr(dev->vdev, index, addr);
if (!addr) {
virtio_queue_set_vector(dev->vdev, index, 0);
} else {
/* Fail if we don't have a big enough queue. */
/* TODO: Add interface to handle vring.num changing */
if (virtio_queue_get_num(dev->vdev, index) > num) {
return -EINVAL;
}
virtio_queue_set_vector(dev->vdev, index, index);
}
/* tell notify handler in case of config change */
dev->vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
return 0;
}
static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
{
int ret;
VqInfoBlock info;
uint8_t status;
VirtioFeatDesc features;
void *config;
hwaddr indicators;
VqConfigBlock vq_config;
VirtioCcwDevice *dev = sch->driver_data;
bool check_len;
int len;
hwaddr hw_len;
if (!dev) {
return -EINVAL;
}
trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
ccw.cmd_code);
check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
/* Look at the command. */
switch (ccw.cmd_code) {
case CCW_CMD_SET_VQ:
if (check_len) {
if (ccw.count != sizeof(info)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(info)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
info.queue = ldq_phys(ccw.cda);
info.align = ldl_phys(ccw.cda + sizeof(info.queue));
info.index = lduw_phys(ccw.cda + sizeof(info.queue)
+ sizeof(info.align));
info.num = lduw_phys(ccw.cda + sizeof(info.queue)
+ sizeof(info.align)
+ sizeof(info.index));
ret = virtio_ccw_set_vqs(sch, info.queue, info.align, info.index,
info.num);
sch->curr_status.scsw.count = 0;
}
break;
case CCW_CMD_VDEV_RESET:
virtio_ccw_stop_ioeventfd(dev);
virtio_reset(dev->vdev);
ret = 0;
break;
case CCW_CMD_READ_FEAT:
if (check_len) {
if (ccw.count != sizeof(features)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(features)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
features.index = ldub_phys(ccw.cda + sizeof(features.features));
if (features.index < ARRAY_SIZE(dev->host_features)) {
features.features = dev->host_features[features.index];
} else {
/* Return zeroes if the guest supports more feature bits. */
features.features = 0;
}
stl_le_phys(ccw.cda, features.features);
sch->curr_status.scsw.count = ccw.count - sizeof(features);
ret = 0;
}
break;
case CCW_CMD_WRITE_FEAT:
if (check_len) {
if (ccw.count != sizeof(features)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(features)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
features.index = ldub_phys(ccw.cda + sizeof(features.features));
features.features = ldl_le_phys(ccw.cda);
if (features.index < ARRAY_SIZE(dev->host_features)) {
virtio_bus_set_vdev_features(&dev->bus, features.features);
dev->vdev->guest_features = features.features;
} else {
/*
* If the guest supports more feature bits, assert that it
* passes us zeroes for those we don't support.
*/
if (features.features) {
fprintf(stderr, "Guest bug: features[%i]=%x (expected 0)\n",
features.index, features.features);
/* XXX: do a unit check here? */
}
}
sch->curr_status.scsw.count = ccw.count - sizeof(features);
ret = 0;
}
break;
case CCW_CMD_READ_CONF:
if (check_len) {
if (ccw.count > dev->vdev->config_len) {
ret = -EINVAL;
break;
}
}
len = MIN(ccw.count, dev->vdev->config_len);
if (!ccw.cda) {
ret = -EFAULT;
} else {
virtio_bus_get_vdev_config(&dev->bus, dev->vdev->config);
/* XXX config space endianness */
cpu_physical_memory_write(ccw.cda, dev->vdev->config, len);
sch->curr_status.scsw.count = ccw.count - len;
ret = 0;
}
break;
case CCW_CMD_WRITE_CONF:
if (check_len) {
if (ccw.count > dev->vdev->config_len) {
ret = -EINVAL;
break;
}
}
len = MIN(ccw.count, dev->vdev->config_len);
hw_len = len;
if (!ccw.cda) {
ret = -EFAULT;
} else {
config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
if (!config) {
ret = -EFAULT;
} else {
len = hw_len;
/* XXX config space endianness */
memcpy(dev->vdev->config, config, len);
cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
virtio_bus_set_vdev_config(&dev->bus, dev->vdev->config);
sch->curr_status.scsw.count = ccw.count - len;
ret = 0;
}
}
break;
case CCW_CMD_WRITE_STATUS:
if (check_len) {
if (ccw.count != sizeof(status)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(status)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
status = ldub_phys(ccw.cda);
if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
virtio_ccw_stop_ioeventfd(dev);
}
virtio_set_status(dev->vdev, status);
if (dev->vdev->status == 0) {
virtio_reset(dev->vdev);
}
if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
virtio_ccw_start_ioeventfd(dev);
}
sch->curr_status.scsw.count = ccw.count - sizeof(status);
ret = 0;
}
break;
case CCW_CMD_SET_IND:
if (check_len) {
if (ccw.count != sizeof(indicators)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(indicators)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
indicators = ldq_phys(ccw.cda);
dev->indicators = indicators;
sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
ret = 0;
}
break;
case CCW_CMD_SET_CONF_IND:
if (check_len) {
if (ccw.count != sizeof(indicators)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(indicators)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
indicators = ldq_phys(ccw.cda);
dev->indicators2 = indicators;
sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
ret = 0;
}
break;
case CCW_CMD_READ_VQ_CONF:
if (check_len) {
if (ccw.count != sizeof(vq_config)) {
ret = -EINVAL;
break;
}
} else if (ccw.count < sizeof(vq_config)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
if (!ccw.cda) {
ret = -EFAULT;
} else {
vq_config.index = lduw_phys(ccw.cda);
vq_config.num_max = virtio_queue_get_num(dev->vdev,
vq_config.index);
stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
ret = 0;
}
break;
default:
ret = -ENOSYS;
break;
}
return ret;
}
static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
{
unsigned int cssid = 0;
unsigned int ssid = 0;
unsigned int schid;
unsigned int devno;
bool have_devno = false;
bool found = false;
SubchDev *sch;
int ret;
int num;
DeviceState *parent = DEVICE(dev);
sch = g_malloc0(sizeof(SubchDev));
sch->driver_data = dev;
dev->sch = sch;
dev->vdev = vdev;
dev->indicators = 0;
/* Initialize subchannel structure. */
sch->channel_prog = 0x0;
sch->last_cmd_valid = false;
sch->orb = NULL;
/*
* Use a device number if provided. Otherwise, fall back to subchannel
* number.
*/
if (dev->bus_id) {
num = sscanf(dev->bus_id, "%x.%x.%04x", &cssid, &ssid, &devno);
if (num == 3) {
if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
ret = -EINVAL;
error_report("Invalid cssid or ssid: cssid %x, ssid %x",
cssid, ssid);
goto out_err;
}
/* Enforce use of virtual cssid. */
if (cssid != VIRTUAL_CSSID) {
ret = -EINVAL;
error_report("cssid %x not valid for virtio devices", cssid);
goto out_err;
}
if (css_devno_used(cssid, ssid, devno)) {
ret = -EEXIST;
error_report("Device %x.%x.%04x already exists", cssid, ssid,
devno);
goto out_err;
}
sch->cssid = cssid;
sch->ssid = ssid;
sch->devno = devno;
have_devno = true;
} else {
ret = -EINVAL;
error_report("Malformed devno parameter '%s'", dev->bus_id);
goto out_err;
}
}
/* Find the next free id. */
if (have_devno) {
for (schid = 0; schid <= MAX_SCHID; schid++) {
if (!css_find_subch(1, cssid, ssid, schid)) {
sch->schid = schid;
css_subch_assign(cssid, ssid, schid, devno, sch);
found = true;
break;
}
}
if (!found) {
ret = -ENODEV;
error_report("No free subchannel found for %x.%x.%04x", cssid, ssid,
devno);
goto out_err;
}
trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
"user-configured");
} else {
cssid = VIRTUAL_CSSID;
for (ssid = 0; ssid <= MAX_SSID; ssid++) {
for (schid = 0; schid <= MAX_SCHID; schid++) {
if (!css_find_subch(1, cssid, ssid, schid)) {
sch->cssid = cssid;
sch->ssid = ssid;
sch->schid = schid;
devno = schid;
/*
* If the devno is already taken, look further in this
* subchannel set.
*/
while (css_devno_used(cssid, ssid, devno)) {
if (devno == MAX_SCHID) {
devno = 0;
} else if (devno == schid - 1) {
ret = -ENODEV;
error_report("No free devno found");
goto out_err;
} else {
devno++;
}
}
sch->devno = devno;
css_subch_assign(cssid, ssid, schid, devno, sch);
found = true;
break;
}
}
if (found) {
break;
}
}
if (!found) {
ret = -ENODEV;
error_report("Virtual channel subsystem is full!");
goto out_err;
}
trace_virtio_ccw_new_device(cssid, ssid, schid, devno,
"auto-configured");
}
/* Build initial schib. */
css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
sch->ccw_cb = virtio_ccw_cb;
/* Build senseid data. */
memset(&sch->id, 0, sizeof(SenseId));
sch->id.reserved = 0xff;
sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
sch->id.cu_model = dev->vdev->device_id;
/* Only the first 32 feature bits are used. */
dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
dev->host_features[0]);
dev->host_features[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
dev->host_features[0] |= 0x1 << VIRTIO_F_BAD_FEATURE;
css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
parent->hotplugged, 1);
return 0;
out_err:
dev->sch = NULL;
g_free(sch);
return ret;
}
static int virtio_ccw_exit(VirtioCcwDevice *dev)
{
SubchDev *sch = dev->sch;
virtio_ccw_stop_ioeventfd(dev);
if (sch) {
css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
g_free(sch);
}
dev->indicators = 0;
return 0;
}
static int virtio_ccw_net_init(VirtioCcwDevice *ccw_dev)
{
DeviceState *qdev = DEVICE(ccw_dev);
VirtIONetCcw *dev = VIRTIO_NET_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
virtio_net_set_config_size(&dev->vdev, ccw_dev->host_features[0]);
virtio_net_set_netclient_name(&dev->vdev, qdev->id,
object_get_typename(OBJECT(qdev)));
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
static void virtio_ccw_net_instance_init(Object *obj)
{
VirtIONetCcw *dev = VIRTIO_NET_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_NET);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
}
static int virtio_ccw_blk_init(VirtioCcwDevice *ccw_dev)
{
VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
virtio_blk_set_conf(vdev, &(dev->blk));
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
static void virtio_ccw_blk_instance_init(Object *obj)
{
VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
}
static int virtio_ccw_serial_init(VirtioCcwDevice *ccw_dev)
{
VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
DeviceState *proxy = DEVICE(ccw_dev);
char *bus_name;
/*
* For command line compatibility, this sets the virtio-serial-device bus
* name as before.
*/
if (proxy->id) {
bus_name = g_strdup_printf("%s.0", proxy->id);
virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
g_free(bus_name);
}
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
static void virtio_ccw_serial_instance_init(Object *obj)
{
VirtioSerialCcw *dev = VIRTIO_SERIAL_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SERIAL);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
}
static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev)
{
VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
static void balloon_ccw_stats_get_all(Object *obj, struct Visitor *v,
void *opaque, const char *name,
Error **errp)
{
VirtIOBalloonCcw *dev = opaque;
object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
}
static void balloon_ccw_stats_get_poll_interval(Object *obj, struct Visitor *v,
void *opaque, const char *name,
Error **errp)
{
VirtIOBalloonCcw *dev = opaque;
object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
errp);
}
static void balloon_ccw_stats_set_poll_interval(Object *obj, struct Visitor *v,
void *opaque, const char *name,
Error **errp)
{
VirtIOBalloonCcw *dev = opaque;
object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
errp);
}
static void virtio_ccw_balloon_instance_init(Object *obj)
{
VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_property_add(obj, "guest-stats", "guest statistics",
balloon_ccw_stats_get_all, NULL, NULL, dev, NULL);
object_property_add(obj, "guest-stats-polling-interval", "int",
balloon_ccw_stats_get_poll_interval,
balloon_ccw_stats_set_poll_interval,
NULL, dev, NULL);
}
static int virtio_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
{
VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
DeviceState *qdev = DEVICE(ccw_dev);
char *bus_name;
/*
* For command line compatibility, this sets the virtio-scsi-device bus
* name as before.
*/
if (qdev->id) {
bus_name = g_strdup_printf("%s.0", qdev->id);
virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
g_free(bus_name);
}
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
static void virtio_ccw_scsi_instance_init(Object *obj)
{
VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
}
#ifdef CONFIG_VHOST_SCSI
static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
{
VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
static void vhost_ccw_scsi_instance_init(Object *obj)
{
VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VHOST_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
}
#endif
static int virtio_ccw_rng_init(VirtioCcwDevice *ccw_dev)
{
VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
DeviceState *vdev = DEVICE(&dev->vdev);
qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
if (qdev_init(vdev) < 0) {
return -1;
}
object_property_set_link(OBJECT(dev),
OBJECT(dev->vdev.conf.rng), "rng",
NULL);
return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
}
/* DeviceState to VirtioCcwDevice. Note: used on datapath,
* be careful and test performance if you change this.
*/
static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
{
return container_of(d, VirtioCcwDevice, parent_obj);
}
static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
{
VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
SubchDev *sch = dev->sch;
uint64_t indicators;
if (vector >= 128) {
return;
}
if (vector < VIRTIO_PCI_QUEUE_MAX) {
if (!dev->indicators) {
return;
}
indicators = ldq_phys(dev->indicators);
indicators |= 1ULL << vector;
stq_phys(dev->indicators, indicators);
} else {
if (!dev->indicators2) {
return;
}
vector = 0;
indicators = ldq_phys(dev->indicators2);
indicators |= 1ULL << vector;
stq_phys(dev->indicators2, indicators);
}
css_conditional_io_interrupt(sch);
}
static unsigned virtio_ccw_get_features(DeviceState *d)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
/* Only the first 32 feature bits are used. */
return dev->host_features[0];
}
static void virtio_ccw_reset(DeviceState *d)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
virtio_ccw_stop_ioeventfd(dev);
virtio_reset(dev->vdev);
css_reset_sch(dev->sch);
dev->indicators = 0;
dev->indicators2 = 0;
}
static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
if (running) {
virtio_ccw_start_ioeventfd(dev);
} else {
virtio_ccw_stop_ioeventfd(dev);
}
}
static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
}
static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
/* Stop using the generic ioeventfd, we are doing eventfd handling
* ourselves below */
dev->ioeventfd_disabled = assign;
if (assign) {
virtio_ccw_stop_ioeventfd(dev);
}
return virtio_ccw_set_guest2host_notifier(dev, n, assign, false);
}
static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
bool assign, bool with_irqfd)
{
VirtQueue *vq = virtio_get_queue(dev->vdev, n);
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(dev->vdev);
if (assign) {
int r = event_notifier_init(notifier, 0);
if (r < 0) {
return r;
}
virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
/* We do not support irqfd for classic I/O interrupts, because the
* classic interrupts are intermixed with the subchannel status, that
* is queried with test subchannel. We want to use vhost, though.
* Lets make sure to have vhost running and wire up the irq fd to
* land in qemu (and only the irq fd) in this code.
*/
if (k->guest_notifier_mask) {
k->guest_notifier_mask(dev->vdev, n, false);
}
/* get lost events and re-inject */
if (k->guest_notifier_pending &&
k->guest_notifier_pending(dev->vdev, n)) {
event_notifier_set(notifier);
}
} else {
if (k->guest_notifier_mask) {
k->guest_notifier_mask(dev->vdev, n, true);
}
virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
event_notifier_cleanup(notifier);
}
return 0;
}
static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
bool assigned)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
VirtIODevice *vdev = dev->vdev;
int r, n;
for (n = 0; n < nvqs; n++) {
if (!virtio_queue_get_num(vdev, n)) {
break;
}
/* false -> true, as soon as irqfd works */
r = virtio_ccw_set_guest_notifier(dev, n, assigned, false);
if (r < 0) {
goto assign_error;
}
}
return 0;
assign_error:
while (--n >= 0) {
virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
}
return r;
}
/**************** Virtio-ccw Bus Device Descriptions *******************/
static Property virtio_ccw_net_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetCcw, vdev.net_conf),
DEFINE_NIC_PROPERTIES(VirtIONetCcw, vdev.nic_conf),
DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_ccw_net_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = virtio_ccw_net_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = virtio_ccw_net_properties;
}
static const TypeInfo virtio_ccw_net = {
.name = TYPE_VIRTIO_NET_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtIONetCcw),
.instance_init = virtio_ccw_net_instance_init,
.class_init = virtio_ccw_net_class_init,
};
static Property virtio_ccw_blk_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw, blk),
DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_ccw_blk_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = virtio_ccw_blk_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = virtio_ccw_blk_properties;
}
static const TypeInfo virtio_ccw_blk = {
.name = TYPE_VIRTIO_BLK_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtIOBlkCcw),
.instance_init = virtio_ccw_blk_instance_init,
.class_init = virtio_ccw_blk_class_init,
};
static Property virtio_ccw_serial_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw, vdev.serial),
DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_ccw_serial_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = virtio_ccw_serial_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = virtio_ccw_serial_properties;
}
static const TypeInfo virtio_ccw_serial = {
.name = TYPE_VIRTIO_SERIAL_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtioSerialCcw),
.instance_init = virtio_ccw_serial_instance_init,
.class_init = virtio_ccw_serial_class_init,
};
static Property virtio_ccw_balloon_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_ccw_balloon_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = virtio_ccw_balloon_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = virtio_ccw_balloon_properties;
}
static const TypeInfo virtio_ccw_balloon = {
.name = TYPE_VIRTIO_BALLOON_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtIOBalloonCcw),
.instance_init = virtio_ccw_balloon_instance_init,
.class_init = virtio_ccw_balloon_class_init,
};
static Property virtio_ccw_scsi_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_ccw_scsi_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = virtio_ccw_scsi_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = virtio_ccw_scsi_properties;
}
static const TypeInfo virtio_ccw_scsi = {
.name = TYPE_VIRTIO_SCSI_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtIOSCSICcw),
.instance_init = virtio_ccw_scsi_instance_init,
.class_init = virtio_ccw_scsi_class_init,
};
#ifdef CONFIG_VHOST_SCSI
static Property vhost_ccw_scsi_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_PROP_END_OF_LIST(),
};
static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = vhost_ccw_scsi_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = vhost_ccw_scsi_properties;
}
static const TypeInfo vhost_ccw_scsi = {
.name = TYPE_VHOST_SCSI_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtIOSCSICcw),
.instance_init = vhost_ccw_scsi_instance_init,
.class_init = vhost_ccw_scsi_class_init,
};
#endif
static void virtio_ccw_rng_instance_init(Object *obj)
{
VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_RNG);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
(Object **)&dev->vdev.conf.rng, NULL);
}
static Property virtio_ccw_rng_properties[] = {
DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNGCcw, vdev.conf),
DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
k->init = virtio_ccw_rng_init;
k->exit = virtio_ccw_exit;
dc->reset = virtio_ccw_reset;
dc->props = virtio_ccw_rng_properties;
}
static const TypeInfo virtio_ccw_rng = {
.name = TYPE_VIRTIO_RNG_CCW,
.parent = TYPE_VIRTIO_CCW_DEVICE,
.instance_size = sizeof(VirtIORNGCcw),
.instance_init = virtio_ccw_rng_instance_init,
.class_init = virtio_ccw_rng_class_init,
};
static int virtio_ccw_busdev_init(DeviceState *dev)
{
VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
virtio_ccw_bus_new(&_dev->bus, _dev);
return _info->init(_dev);
}
static int virtio_ccw_busdev_exit(DeviceState *dev)
{
VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
VirtIOCCWDeviceClass *_info = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
return _info->exit(_dev);
}
static int virtio_ccw_busdev_unplug(DeviceState *dev)
{
VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
SubchDev *sch = _dev->sch;
/*
* We should arrive here only for device_del, since we don't support
* direct hot(un)plug of channels, but only through virtio.
*/
assert(sch != NULL);
/* Subchannel is now disabled and no longer valid. */
sch->curr_status.pmcw.flags &= ~(PMCW_FLAGS_MASK_ENA |
PMCW_FLAGS_MASK_DNV);
css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid, 1, 0);
qdev_free(dev);
return 0;
}
static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->init = virtio_ccw_busdev_init;
dc->exit = virtio_ccw_busdev_exit;
dc->unplug = virtio_ccw_busdev_unplug;
dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
}
static const TypeInfo virtio_ccw_device_info = {
.name = TYPE_VIRTIO_CCW_DEVICE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(VirtioCcwDevice),
.class_init = virtio_ccw_device_class_init,
.class_size = sizeof(VirtIOCCWDeviceClass),
.abstract = true,
};
/***************** Virtual-css Bus Bridge Device ********************/
/* Only required to have the virtio bus as child in the system bus */
static int virtual_css_bridge_init(SysBusDevice *dev)
{
/* nothing */
return 0;
}
static void virtual_css_bridge_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = virtual_css_bridge_init;
dc->no_user = 1;
}
static const TypeInfo virtual_css_bridge_info = {
.name = "virtual-css-bridge",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SysBusDevice),
.class_init = virtual_css_bridge_class_init,
};
/* virtio-ccw-bus */
static void virtio_ccw_bus_new(VirtioBusState *bus, VirtioCcwDevice *dev)
{
DeviceState *qdev = DEVICE(dev);
BusState *qbus;
char virtio_bus_name[] = "virtio-bus";
qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_CCW_BUS, qdev,
virtio_bus_name);
qbus = BUS(bus);
qbus->allow_hotplug = 1;
}
static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
{
VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
BusClass *bus_class = BUS_CLASS(klass);
bus_class->max_dev = 1;
k->notify = virtio_ccw_notify;
k->get_features = virtio_ccw_get_features;
k->vmstate_change = virtio_ccw_vmstate_change;
k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
k->set_host_notifier = virtio_ccw_set_host_notifier;
k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
}
static const TypeInfo virtio_ccw_bus_info = {
.name = TYPE_VIRTIO_CCW_BUS,
.parent = TYPE_VIRTIO_BUS,
.instance_size = sizeof(VirtioCcwBusState),
.class_init = virtio_ccw_bus_class_init,
};
static void virtio_ccw_register(void)
{
type_register_static(&virtio_ccw_bus_info);
type_register_static(&virtual_css_bus_info);
type_register_static(&virtio_ccw_device_info);
type_register_static(&virtio_ccw_serial);
type_register_static(&virtio_ccw_blk);
type_register_static(&virtio_ccw_net);
type_register_static(&virtio_ccw_balloon);
type_register_static(&virtio_ccw_scsi);
#ifdef CONFIG_VHOST_SCSI
type_register_static(&vhost_ccw_scsi);
#endif
type_register_static(&virtio_ccw_rng);
type_register_static(&virtual_css_bridge_info);
}
type_init(virtio_ccw_register)
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