Revision 1c819449 hw/block/dataplane/virtio-blk.c
| b/hw/block/dataplane/virtio-blk.c | ||
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#include "hw/virtio/virtio-blk.h" |
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#include "virtio-blk.h" |
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#include "block/aio.h" |
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#include "hw/virtio/virtio-bus.h" |
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enum {
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SEG_MAX = 126, /* maximum number of I/O segments */ |
| ... | ... | |
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|
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void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s) |
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{
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s->vdev))); |
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VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); |
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VirtQueue *vq; |
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int i; |
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|
| ... | ... | |
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s->ctx = aio_context_new(); |
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/* Set up guest notifier (irq) */ |
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if (s->vdev->binding->set_guest_notifiers(s->vdev->binding_opaque, 1, |
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true) != 0) {
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if (k->set_guest_notifiers(qbus->parent, 1, true) != 0) {
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fprintf(stderr, "virtio-blk failed to set guest notifier, " |
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"ensure -enable-kvm is set\n"); |
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exit(1); |
| ... | ... | |
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s->guest_notifier = virtio_queue_get_guest_notifier(vq); |
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/* Set up virtqueue notify */ |
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if (s->vdev->binding->set_host_notifier(s->vdev->binding_opaque, |
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0, true) != 0) {
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if (k->set_host_notifier(qbus->parent, 0, true) != 0) {
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fprintf(stderr, "virtio-blk failed to set host notifier\n"); |
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exit(1); |
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} |
| ... | ... | |
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|
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void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s) |
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{
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s->vdev))); |
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VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus); |
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if (!s->started || s->stopping) {
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return; |
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} |
| ... | ... | |
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ioq_cleanup(&s->ioqueue); |
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|
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aio_set_event_notifier(s->ctx, &s->host_notifier, NULL, NULL); |
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s->vdev->binding->set_host_notifier(s->vdev->binding_opaque, 0, false);
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k->set_host_notifier(qbus->parent, 0, false);
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aio_context_unref(s->ctx); |
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/* Clean up guest notifier (irq) */ |
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s->vdev->binding->set_guest_notifiers(s->vdev->binding_opaque, 1, false);
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k->set_guest_notifiers(qbus->parent, 1, false);
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vring_teardown(&s->vring); |
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s->started = false; |
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