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virtio: unify dataplane and non-dataplane ->handle_output() 

Now that virtio-blk and virtio-scsi are ready, get rid of
the handle_aio_output() callback. It's no longer needed.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20211207132336.36627-7-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2021-12-07 13:23:36 +00:00
parent d6fbfe2b83
commit db608fb784
4 changed files with 26 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
hw/block/dataplane/virtio-blk.c
View File

@ -154,17 +154,6 @@ void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
g_free(s);
}
static void virtio_blk_data_plane_handle_output(VirtIODevice *vdev,
VirtQueue *vq)
{
VirtIOBlock *s = (VirtIOBlock *)vdev;
assert(s->dataplane);
assert(s->dataplane_started);
virtio_blk_handle_vq(s, vq);
}
/* Context: QEMU global mutex held */
int virtio_blk_data_plane_start(VirtIODevice *vdev)
{
@ -258,8 +247,7 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
for (i = 0; i < nvqs; i++) {
VirtQueue *vq = virtio_get_queue(s->vdev, i);
virtio_queue_aio_set_host_notifier_handler(vq, s->ctx,
virtio_blk_data_plane_handle_output);
virtio_queue_aio_attach_host_notifier(vq, s->ctx);
}
aio_context_release(s->ctx);
return 0;
@ -302,7 +290,7 @@ static void virtio_blk_data_plane_stop_bh(void *opaque)
for (i = 0; i < s->conf->num_queues; i++) {
VirtQueue *vq = virtio_get_queue(s->vdev, i);
virtio_queue_aio_set_host_notifier_handler(vq, s->ctx, NULL);
virtio_queue_aio_detach_host_notifier(vq, s->ctx);
}
}

54
hw/scsi/virtio-scsi-dataplane.c
View File

@ -49,45 +49,6 @@ void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp)
}
}
static void virtio_scsi_data_plane_handle_cmd(VirtIODevice *vdev,
VirtQueue *vq)
{
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
virtio_scsi_acquire(s);
if (!s->dataplane_fenced) {
assert(s->ctx && s->dataplane_started);
virtio_scsi_handle_cmd_vq(s, vq);
}
virtio_scsi_release(s);
}
static void virtio_scsi_data_plane_handle_ctrl(VirtIODevice *vdev,
VirtQueue *vq)
{
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
virtio_scsi_acquire(s);
if (!s->dataplane_fenced) {
assert(s->ctx && s->dataplane_started);
virtio_scsi_handle_ctrl_vq(s, vq);
}
virtio_scsi_release(s);
}
static void virtio_scsi_data_plane_handle_event(VirtIODevice *vdev,
VirtQueue *vq)
{
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
virtio_scsi_acquire(s);
if (!s->dataplane_fenced) {
assert(s->ctx && s->dataplane_started);
virtio_scsi_handle_event_vq(s, vq);
}
virtio_scsi_release(s);
}
static int virtio_scsi_set_host_notifier(VirtIOSCSI *s, VirtQueue *vq, int n)
{
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s)));
@ -112,10 +73,10 @@ static void virtio_scsi_dataplane_stop_bh(void *opaque)
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
int i;
virtio_queue_aio_set_host_notifier_handler(vs->ctrl_vq, s->ctx, NULL);
virtio_queue_aio_set_host_notifier_handler(vs->event_vq, s->ctx, NULL);
virtio_queue_aio_detach_host_notifier(vs->ctrl_vq, s->ctx);
virtio_queue_aio_detach_host_notifier(vs->event_vq, s->ctx);
for (i = 0; i < vs->conf.num_queues; i++) {
virtio_queue_aio_set_host_notifier_handler(vs->cmd_vqs[i], s->ctx, NULL);
virtio_queue_aio_detach_host_notifier(vs->cmd_vqs[i], s->ctx);
}
}
@ -176,14 +137,11 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
memory_region_transaction_commit();
aio_context_acquire(s->ctx);
virtio_queue_aio_set_host_notifier_handler(vs->ctrl_vq, s->ctx,
virtio_scsi_data_plane_handle_ctrl);
virtio_queue_aio_set_host_notifier_handler(vs->event_vq, s->ctx,
virtio_scsi_data_plane_handle_event);
virtio_queue_aio_attach_host_notifier(vs->ctrl_vq, s->ctx);
virtio_queue_aio_attach_host_notifier(vs->event_vq, s->ctx);
for (i = 0; i < vs->conf.num_queues; i++) {
virtio_queue_aio_set_host_notifier_handler(vs->cmd_vqs[i], s->ctx,
virtio_scsi_data_plane_handle_cmd);
virtio_queue_aio_attach_host_notifier(vs->cmd_vqs[i], s->ctx);
}
s->dataplane_starting = false;

32
hw/virtio/virtio.c
View File

@ -3525,23 +3525,23 @@ static void virtio_queue_host_notifier_aio_poll_end(EventNotifier *n)
virtio_queue_set_notification(vq, 1);
}
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
VirtIOHandleOutput handle_output)
void virtio_queue_aio_attach_host_notifier(VirtQueue *vq, AioContext *ctx)
{
if (handle_output) {
aio_set_event_notifier(ctx, &vq->host_notifier, true,
virtio_queue_host_notifier_read,
virtio_queue_host_notifier_aio_poll,
virtio_queue_host_notifier_aio_poll_ready);
aio_set_event_notifier_poll(ctx, &vq->host_notifier,
virtio_queue_host_notifier_aio_poll_begin,
virtio_queue_host_notifier_aio_poll_end);
} else {
aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL, NULL, NULL);
/* Test and clear notifier before after disabling event,
* in case poll callback didn't have time to run. */
virtio_queue_host_notifier_read(&vq->host_notifier);
}
aio_set_event_notifier(ctx, &vq->host_notifier, true,
virtio_queue_host_notifier_read,
virtio_queue_host_notifier_aio_poll,
virtio_queue_host_notifier_aio_poll_ready);
aio_set_event_notifier_poll(ctx, &vq->host_notifier,
virtio_queue_host_notifier_aio_poll_begin,
virtio_queue_host_notifier_aio_poll_end);
}
void virtio_queue_aio_detach_host_notifier(VirtQueue *vq, AioContext *ctx)
{
aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL, NULL, NULL);
/* Test and clear notifier before after disabling event,
* in case poll callback didn't have time to run. */
virtio_queue_host_notifier_read(&vq->host_notifier);
}
void virtio_queue_host_notifier_read(EventNotifier *n)

4
include/hw/virtio/virtio.h
View File

@ -316,8 +316,8 @@ bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
void virtio_queue_host_notifier_read(EventNotifier *n);
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
VirtIOHandleOutput handle_output);
void virtio_queue_aio_attach_host_notifier(VirtQueue *vq, AioContext *ctx);
void virtio_queue_aio_detach_host_notifier(VirtQueue *vq, AioContext *ctx);
VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);
VirtQueue *virtio_vector_next_queue(VirtQueue *vq);