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qemu/0008-virtio-ccw-remove-vdev...

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From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 20 Sep 2013 16:57:52 +0200
Subject: [PATCH] virtio-ccw: remove vdev field
The vdev field is complicated to synchronize. Just access the
BusState's list of children.
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
hw/s390x/virtio-ccw.c | 80 ++++++++++++++++++++++++++++-----------------------
1 file changed, 44 insertions(+), 36 deletions(-)
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 8835bd4..0fc7387 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -56,9 +56,10 @@ static const TypeInfo virtual_css_bus_info = {
VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
{
VirtIODevice *vdev = NULL;
+ VirtioCcwDevice *dev = sch->driver_data;
- if (sch->driver_data) {
- vdev = ((VirtioCcwDevice *)sch->driver_data)->vdev;
+ if (dev) {
+ vdev = virtio_bus_get_device(&dev->bus);
}
return vdev;
}
@@ -66,7 +67,8 @@ VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
bool assign, bool set_handler)
{
- VirtQueue *vq = virtio_get_queue(dev->vdev, n);
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
+ VirtQueue *vq = virtio_get_queue(vdev, n);
EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
int r = 0;
SubchDev *sch = dev->sch;
@@ -96,6 +98,7 @@ static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
{
+ VirtIODevice *vdev;
int n, r;
if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
@@ -103,8 +106,9 @@ static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
dev->ioeventfd_started) {
return;
}
+ vdev = virtio_bus_get_device(&dev->bus);
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
- if (!virtio_queue_get_num(dev->vdev, n)) {
+ if (!virtio_queue_get_num(vdev, n)) {
continue;
}
r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
@@ -117,7 +121,7 @@ static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
assign_error:
while (--n >= 0) {
- if (!virtio_queue_get_num(dev->vdev, n)) {
+ if (!virtio_queue_get_num(vdev, n)) {
continue;
}
r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
@@ -131,13 +135,15 @@ static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
{
+ VirtIODevice *vdev;
int n, r;
if (!dev->ioeventfd_started) {
return;
}
+ vdev = virtio_bus_get_device(&dev->bus);
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
- if (!virtio_queue_get_num(dev->vdev, n)) {
+ if (!virtio_queue_get_num(vdev, n)) {
continue;
}
r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
@@ -188,7 +194,7 @@ typedef struct VirtioFeatDesc {
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;
+ VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
if (index > VIRTIO_PCI_QUEUE_MAX) {
return -EINVAL;
@@ -199,23 +205,23 @@ static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
return -EINVAL;
}
- if (!dev) {
+ if (!vdev) {
return -EINVAL;
}
- virtio_queue_set_addr(dev->vdev, index, addr);
+ virtio_queue_set_addr(vdev, index, addr);
if (!addr) {
- virtio_queue_set_vector(dev->vdev, index, 0);
+ virtio_queue_set_vector(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) {
+ if (virtio_queue_get_num(vdev, index) > num) {
return -EINVAL;
}
- virtio_queue_set_vector(dev->vdev, index, index);
+ virtio_queue_set_vector(vdev, index, index);
}
/* tell notify handler in case of config change */
- dev->vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
+ vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
return 0;
}
@@ -229,6 +235,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
hwaddr indicators;
VqConfigBlock vq_config;
VirtioCcwDevice *dev = sch->driver_data;
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
bool check_len;
int len;
hwaddr hw_len;
@@ -271,7 +278,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
break;
case CCW_CMD_VDEV_RESET:
virtio_ccw_stop_ioeventfd(dev);
- virtio_reset(dev->vdev);
+ virtio_reset(vdev);
ret = 0;
break;
case CCW_CMD_READ_FEAT:
@@ -318,7 +325,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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;
+ vdev->guest_features = features.features;
} else {
/*
* If the guest supports more feature bits, assert that it
@@ -336,30 +343,30 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
break;
case CCW_CMD_READ_CONF:
if (check_len) {
- if (ccw.count > dev->vdev->config_len) {
+ if (ccw.count > vdev->config_len) {
ret = -EINVAL;
break;
}
}
- len = MIN(ccw.count, dev->vdev->config_len);
+ len = MIN(ccw.count, vdev->config_len);
if (!ccw.cda) {
ret = -EFAULT;
} else {
- virtio_bus_get_vdev_config(&dev->bus, dev->vdev->config);
+ virtio_bus_get_vdev_config(&dev->bus, vdev->config);
/* XXX config space endianness */
- cpu_physical_memory_write(ccw.cda, dev->vdev->config, len);
+ cpu_physical_memory_write(ccw.cda, 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) {
+ if (ccw.count > vdev->config_len) {
ret = -EINVAL;
break;
}
}
- len = MIN(ccw.count, dev->vdev->config_len);
+ len = MIN(ccw.count, vdev->config_len);
hw_len = len;
if (!ccw.cda) {
ret = -EFAULT;
@@ -370,9 +377,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
} else {
len = hw_len;
/* XXX config space endianness */
- memcpy(dev->vdev->config, config, len);
+ memcpy(vdev->config, config, len);
cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
- virtio_bus_set_vdev_config(&dev->bus, dev->vdev->config);
+ virtio_bus_set_vdev_config(&dev->bus, vdev->config);
sch->curr_status.scsw.count = ccw.count - len;
ret = 0;
}
@@ -396,9 +403,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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);
+ virtio_set_status(vdev, status);
+ if (vdev->status == 0) {
+ virtio_reset(vdev);
}
if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
virtio_ccw_start_ioeventfd(dev);
@@ -462,7 +469,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
ret = -EFAULT;
} else {
vq_config.index = lduw_phys(ccw.cda);
- vq_config.num_max = virtio_queue_get_num(dev->vdev,
+ vq_config.num_max = virtio_queue_get_num(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);
@@ -494,7 +501,6 @@ static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
sch->driver_data = dev;
dev->sch = sch;
- dev->vdev = vdev;
dev->indicators = 0;
/* Initialize subchannel structure. */
@@ -607,7 +613,7 @@ static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
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;
+ sch->id.cu_model = vdev->device_id;
/* Only the first 32 feature bits are used. */
dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
@@ -891,9 +897,10 @@ static unsigned virtio_ccw_get_features(DeviceState *d)
static void virtio_ccw_reset(DeviceState *d)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
virtio_ccw_stop_ioeventfd(dev);
- virtio_reset(dev->vdev);
+ virtio_reset(vdev);
css_reset_sch(dev->sch);
dev->indicators = 0;
dev->indicators2 = 0;
@@ -933,9 +940,10 @@ static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
bool assign, bool with_irqfd)
{
- VirtQueue *vq = virtio_get_queue(dev->vdev, n);
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
+ VirtQueue *vq = virtio_get_queue(vdev, n);
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
- VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(dev->vdev);
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
if (assign) {
int r = event_notifier_init(notifier, 0);
@@ -951,16 +959,16 @@ static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
* land in qemu (and only the irq fd) in this code.
*/
if (k->guest_notifier_mask) {
- k->guest_notifier_mask(dev->vdev, n, false);
+ k->guest_notifier_mask(vdev, n, false);
}
/* get lost events and re-inject */
if (k->guest_notifier_pending &&
- k->guest_notifier_pending(dev->vdev, n)) {
+ k->guest_notifier_pending(vdev, n)) {
event_notifier_set(notifier);
}
} else {
if (k->guest_notifier_mask) {
- k->guest_notifier_mask(dev->vdev, n, true);
+ k->guest_notifier_mask(vdev, n, true);
}
virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
event_notifier_cleanup(notifier);
@@ -972,7 +980,7 @@ static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
bool assigned)
{
VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
- VirtIODevice *vdev = dev->vdev;
+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
int r, n;
for (n = 0; n < nvqs; n++) {
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