294 lines
11 KiB
Diff
294 lines
11 KiB
Diff
From 7b81da30e3f4cb6e617f08cc822f4575a4a9e431 Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Fri, 20 Sep 2013 16:57:52 +0200
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Subject: [PATCH] virtio-ccw: remove vdev field
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The vdev field is complicated to synchronize. Just access the
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BusState's list of children.
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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hw/s390x/virtio-ccw.c | 80 ++++++++++++++++++++++++++++-----------------------
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1 file changed, 44 insertions(+), 36 deletions(-)
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diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
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index f93a81c..8947196 100644
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--- a/hw/s390x/virtio-ccw.c
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+++ b/hw/s390x/virtio-ccw.c
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@@ -57,9 +57,10 @@ static const TypeInfo virtual_css_bus_info = {
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VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
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{
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VirtIODevice *vdev = NULL;
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+ VirtioCcwDevice *dev = sch->driver_data;
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- if (sch->driver_data) {
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- vdev = ((VirtioCcwDevice *)sch->driver_data)->vdev;
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+ if (dev) {
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+ vdev = virtio_bus_get_device(&dev->bus);
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}
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return vdev;
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}
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@@ -67,7 +68,8 @@ VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
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static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
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bool assign, bool set_handler)
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{
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- VirtQueue *vq = virtio_get_queue(dev->vdev, n);
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+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
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+ VirtQueue *vq = virtio_get_queue(vdev, n);
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EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
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int r = 0;
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SubchDev *sch = dev->sch;
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@@ -97,6 +99,7 @@ static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice *dev, int n,
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static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
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{
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+ VirtIODevice *vdev;
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int n, r;
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if (!(dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) ||
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@@ -104,8 +107,9 @@ static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
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dev->ioeventfd_started) {
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return;
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}
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+ vdev = virtio_bus_get_device(&dev->bus);
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for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
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- if (!virtio_queue_get_num(dev->vdev, n)) {
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+ if (!virtio_queue_get_num(vdev, n)) {
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continue;
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}
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r = virtio_ccw_set_guest2host_notifier(dev, n, true, true);
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@@ -118,7 +122,7 @@ static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
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assign_error:
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while (--n >= 0) {
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- if (!virtio_queue_get_num(dev->vdev, n)) {
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+ if (!virtio_queue_get_num(vdev, n)) {
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continue;
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}
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r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
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@@ -132,13 +136,15 @@ static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
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static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
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{
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+ VirtIODevice *vdev;
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int n, r;
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if (!dev->ioeventfd_started) {
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return;
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}
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+ vdev = virtio_bus_get_device(&dev->bus);
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for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
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- if (!virtio_queue_get_num(dev->vdev, n)) {
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+ if (!virtio_queue_get_num(vdev, n)) {
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continue;
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}
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r = virtio_ccw_set_guest2host_notifier(dev, n, false, false);
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@@ -189,7 +195,7 @@ typedef struct VirtioFeatDesc {
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static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
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uint16_t index, uint16_t num)
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{
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- VirtioCcwDevice *dev = sch->driver_data;
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+ VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
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if (index > VIRTIO_PCI_QUEUE_MAX) {
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return -EINVAL;
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@@ -200,23 +206,23 @@ static int virtio_ccw_set_vqs(SubchDev *sch, uint64_t addr, uint32_t align,
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return -EINVAL;
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}
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- if (!dev) {
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+ if (!vdev) {
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return -EINVAL;
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}
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- virtio_queue_set_addr(dev->vdev, index, addr);
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+ virtio_queue_set_addr(vdev, index, addr);
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if (!addr) {
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- virtio_queue_set_vector(dev->vdev, index, 0);
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+ virtio_queue_set_vector(vdev, index, 0);
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} else {
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/* Fail if we don't have a big enough queue. */
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/* TODO: Add interface to handle vring.num changing */
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- if (virtio_queue_get_num(dev->vdev, index) > num) {
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+ if (virtio_queue_get_num(vdev, index) > num) {
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return -EINVAL;
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}
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- virtio_queue_set_vector(dev->vdev, index, index);
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+ virtio_queue_set_vector(vdev, index, index);
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}
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/* tell notify handler in case of config change */
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- dev->vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
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+ vdev->config_vector = VIRTIO_PCI_QUEUE_MAX;
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return 0;
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}
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@@ -230,6 +236,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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hwaddr indicators;
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VqConfigBlock vq_config;
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VirtioCcwDevice *dev = sch->driver_data;
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+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
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bool check_len;
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int len;
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hwaddr hw_len;
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@@ -272,7 +279,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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break;
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case CCW_CMD_VDEV_RESET:
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virtio_ccw_stop_ioeventfd(dev);
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- virtio_reset(dev->vdev);
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+ virtio_reset(vdev);
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ret = 0;
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break;
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case CCW_CMD_READ_FEAT:
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@@ -319,7 +326,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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features.features = ldl_le_phys(ccw.cda);
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if (features.index < ARRAY_SIZE(dev->host_features)) {
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virtio_bus_set_vdev_features(&dev->bus, features.features);
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- dev->vdev->guest_features = features.features;
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+ vdev->guest_features = features.features;
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} else {
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/*
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* If the guest supports more feature bits, assert that it
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@@ -337,30 +344,30 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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break;
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case CCW_CMD_READ_CONF:
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if (check_len) {
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- if (ccw.count > dev->vdev->config_len) {
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+ if (ccw.count > vdev->config_len) {
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ret = -EINVAL;
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break;
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}
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}
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- len = MIN(ccw.count, dev->vdev->config_len);
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+ len = MIN(ccw.count, vdev->config_len);
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if (!ccw.cda) {
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ret = -EFAULT;
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} else {
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- virtio_bus_get_vdev_config(&dev->bus, dev->vdev->config);
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+ virtio_bus_get_vdev_config(&dev->bus, vdev->config);
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/* XXX config space endianness */
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- cpu_physical_memory_write(ccw.cda, dev->vdev->config, len);
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+ cpu_physical_memory_write(ccw.cda, vdev->config, len);
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sch->curr_status.scsw.count = ccw.count - len;
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ret = 0;
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}
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break;
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case CCW_CMD_WRITE_CONF:
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if (check_len) {
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- if (ccw.count > dev->vdev->config_len) {
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+ if (ccw.count > vdev->config_len) {
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ret = -EINVAL;
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break;
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}
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}
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- len = MIN(ccw.count, dev->vdev->config_len);
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+ len = MIN(ccw.count, vdev->config_len);
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hw_len = len;
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if (!ccw.cda) {
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ret = -EFAULT;
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@@ -371,9 +378,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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} else {
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len = hw_len;
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/* XXX config space endianness */
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- memcpy(dev->vdev->config, config, len);
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+ memcpy(vdev->config, config, len);
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cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
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- virtio_bus_set_vdev_config(&dev->bus, dev->vdev->config);
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+ virtio_bus_set_vdev_config(&dev->bus, vdev->config);
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sch->curr_status.scsw.count = ccw.count - len;
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ret = 0;
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}
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@@ -397,9 +404,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
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virtio_ccw_stop_ioeventfd(dev);
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}
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- virtio_set_status(dev->vdev, status);
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- if (dev->vdev->status == 0) {
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- virtio_reset(dev->vdev);
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+ virtio_set_status(vdev, status);
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+ if (vdev->status == 0) {
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+ virtio_reset(vdev);
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}
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if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
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virtio_ccw_start_ioeventfd(dev);
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@@ -463,7 +470,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
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ret = -EFAULT;
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} else {
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vq_config.index = lduw_phys(ccw.cda);
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- vq_config.num_max = virtio_queue_get_num(dev->vdev,
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+ vq_config.num_max = virtio_queue_get_num(vdev,
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vq_config.index);
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stw_phys(ccw.cda + sizeof(vq_config.index), vq_config.num_max);
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sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
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@@ -495,7 +502,6 @@ static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
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sch->driver_data = dev;
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dev->sch = sch;
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- dev->vdev = vdev;
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dev->indicators = 0;
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/* Initialize subchannel structure. */
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@@ -608,7 +614,7 @@ static int virtio_ccw_device_init(VirtioCcwDevice *dev, VirtIODevice *vdev)
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memset(&sch->id, 0, sizeof(SenseId));
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sch->id.reserved = 0xff;
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sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
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- sch->id.cu_model = dev->vdev->device_id;
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+ sch->id.cu_model = vdev->device_id;
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/* Only the first 32 feature bits are used. */
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dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
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@@ -892,9 +898,10 @@ static unsigned virtio_ccw_get_features(DeviceState *d)
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static void virtio_ccw_reset(DeviceState *d)
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{
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VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
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+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
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virtio_ccw_stop_ioeventfd(dev);
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- virtio_reset(dev->vdev);
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+ virtio_reset(vdev);
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css_reset_sch(dev->sch);
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dev->indicators = 0;
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dev->indicators2 = 0;
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@@ -934,9 +941,10 @@ static int virtio_ccw_set_host_notifier(DeviceState *d, int n, bool assign)
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static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
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bool assign, bool with_irqfd)
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{
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- VirtQueue *vq = virtio_get_queue(dev->vdev, n);
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+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
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+ VirtQueue *vq = virtio_get_queue(vdev, n);
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EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
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- VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(dev->vdev);
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+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
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if (assign) {
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int r = event_notifier_init(notifier, 0);
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@@ -952,16 +960,16 @@ static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
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* land in qemu (and only the irq fd) in this code.
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*/
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if (k->guest_notifier_mask) {
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- k->guest_notifier_mask(dev->vdev, n, false);
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+ k->guest_notifier_mask(vdev, n, false);
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}
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/* get lost events and re-inject */
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if (k->guest_notifier_pending &&
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- k->guest_notifier_pending(dev->vdev, n)) {
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+ k->guest_notifier_pending(vdev, n)) {
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event_notifier_set(notifier);
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}
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} else {
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if (k->guest_notifier_mask) {
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- k->guest_notifier_mask(dev->vdev, n, true);
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+ k->guest_notifier_mask(vdev, n, true);
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}
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virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
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event_notifier_cleanup(notifier);
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@@ -973,7 +981,7 @@ static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
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bool assigned)
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{
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VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
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- VirtIODevice *vdev = dev->vdev;
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+ VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
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int r, n;
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for (n = 0; n < nvqs; n++) {
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