Commit 493b94bf authored by Mike Christie's avatar Mike Christie Committed by Michael S. Tsirkin
Browse files

vhost: convert poll work to be vq based 



This has the drivers pass in their poll to vq mapping and then converts
the core poll code to use the vq based helpers. In the next patches we
will allow vqs to be handled by different workers, so to allow drivers
to execute operations like queue, stop, flush, etc on specific polls/vqs
we need to know the mappings.

Signed-off-by: default avatarMike Christie <michael.christie@oracle.com>
Message-Id: <20230626232307.97930-8-michael.christie@oracle.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent a6fc0473

drivers/vhost/net.c

+4 −2
Original line number Diff line number Diff line
@@ -1347,8 +1347,10 @@ static int vhost_net_open(struct inode *inode, struct file *f) 
		       VHOST_NET_PKT_WEIGHT, VHOST_NET_WEIGHT, true,

		       NULL);



	vhost_poll_init(n->poll + VHOST_NET_VQ_TX, handle_tx_net, EPOLLOUT, dev);

	vhost_poll_init(n->poll + VHOST_NET_VQ_RX, handle_rx_net, EPOLLIN, dev);

	vhost_poll_init(n->poll + VHOST_NET_VQ_TX, handle_tx_net, EPOLLOUT, dev,

			vqs[VHOST_NET_VQ_TX]);

	vhost_poll_init(n->poll + VHOST_NET_VQ_RX, handle_rx_net, EPOLLIN, dev,

			vqs[VHOST_NET_VQ_RX]);



	f->private_data = n;

	n->page_frag.page = NULL;

drivers/vhost/vhost.c

+5 −3
Original line number Diff line number Diff line
@@ -187,13 +187,15 @@ EXPORT_SYMBOL_GPL(vhost_work_init); 


/* Init poll structure */

void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,

		     __poll_t mask, struct vhost_dev *dev)

		     __poll_t mask, struct vhost_dev *dev,

		     struct vhost_virtqueue *vq)

{

	init_waitqueue_func_entry(&poll->wait, vhost_poll_wakeup);

	init_poll_funcptr(&poll->table, vhost_poll_func);

	poll->mask = mask;

	poll->dev = dev;

	poll->wqh = NULL;

	poll->vq = vq;



	vhost_work_init(&poll->work, fn);

}
@@ -297,7 +299,7 @@ EXPORT_SYMBOL_GPL(vhost_vq_has_work); 


void vhost_poll_queue(struct vhost_poll *poll)

{

	vhost_work_queue(poll->dev, &poll->work);

	vhost_vq_work_queue(poll->vq, &poll->work);

}

EXPORT_SYMBOL_GPL(vhost_poll_queue);
@@ -508,7 +510,7 @@ void vhost_dev_init(struct vhost_dev *dev, 
		vhost_vq_reset(dev, vq);

		if (vq->handle_kick)

			vhost_poll_init(&vq->poll, vq->handle_kick,

					EPOLLIN, dev);

					EPOLLIN, dev, vq);

	}

}

EXPORT_SYMBOL_GPL(vhost_dev_init);

drivers/vhost/vhost.h

+3 −1
Original line number Diff line number Diff line
@@ -41,13 +41,15 @@ struct vhost_poll { 
	struct vhost_work	work;

	__poll_t		mask;

	struct vhost_dev	*dev;

	struct vhost_virtqueue	*vq;

};



void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);

bool vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work);



void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,

		     __poll_t mask, struct vhost_dev *dev);

		     __poll_t mask, struct vhost_dev *dev,

		     struct vhost_virtqueue *vq);

int vhost_poll_start(struct vhost_poll *poll, struct file *file);

void vhost_poll_stop(struct vhost_poll *poll);

void vhost_poll_queue(struct vhost_poll *poll);