[PATCH V4 04/12] vhost: take worker or vq instead of dev for flushing
flat view
STALE1803d
SUPERSEDED
From: Mike Christie <michael.christie@oracle.com>
Date: 2021-11-04 19:05:29
Also in:
linux-scsi, target-devel
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
Revision v4 of 5 in this series.
Revisions (5)
This patch has the core work flush function take a worker for when we support multiple workers. It also adds a helper that takes a vq during flushing so modules can control which vq/worker to flush. This temp leaves vhost_work_dev_flush. It will be removed when the drivers are converted in the next patches. Signed-off-by: Mike Christie <michael.christie@oracle.com> --- drivers/vhost/vhost.c | 30 +++++++++++++++++++++--------- drivers/vhost/vhost.h | 1 + 2 files changed, 22 insertions(+), 9 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index f2c6981297d0..e4d765f6c821 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c@@ -246,6 +246,26 @@ static void vhost_work_queue_on(struct vhost_worker *worker, } } +static void vhost_work_flush_on(struct vhost_worker *worker) +{ + struct vhost_flush_struct flush; + + if (!worker) + return; + + init_completion(&flush.wait_event); + vhost_work_init(&flush.work, vhost_flush_work); + + vhost_work_queue_on(worker, &flush.work); + wait_for_completion(&flush.wait_event); +} + +void vhost_vq_work_flush(struct vhost_virtqueue *vq) +{ + vhost_work_flush_on(vq->worker); +} +EXPORT_SYMBOL_GPL(vhost_vq_work_flush); + void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work) { vhost_work_queue_on(dev->worker, work);
@@ -260,15 +280,7 @@ EXPORT_SYMBOL_GPL(vhost_vq_work_queue); void vhost_work_dev_flush(struct vhost_dev *dev) { - struct vhost_flush_struct flush; - - if (dev->worker) { - init_completion(&flush.wait_event); - vhost_work_init(&flush.work, vhost_flush_work); - - vhost_work_queue(dev, &flush.work); - wait_for_completion(&flush.wait_event); - } + vhost_work_flush_on(dev->worker); } EXPORT_SYMBOL_GPL(vhost_work_dev_flush);
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 8f209d1c8890..a985caa35633 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h@@ -199,6 +199,7 @@ int vhost_get_vq_desc(struct vhost_virtqueue *, struct vhost_log *log, unsigned int *log_num); void vhost_discard_vq_desc(struct vhost_virtqueue *, int n); +void vhost_vq_work_flush(struct vhost_virtqueue *vq); void vhost_vq_work_queue(struct vhost_virtqueue *vq, struct vhost_work *work); bool vhost_vq_has_work(struct vhost_virtqueue *vq); bool vhost_vq_is_setup(struct vhost_virtqueue *vq);
--
2.25.1
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