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Message-ID: <CACGkMEvMzp3zW5OXicemuC-GetrfMdGdscY_ZY5xY_pO8eYZvQ@mail.gmail.com> Date: Thu, 19 Oct 2023 14:18:37 +0800 From: Jason Wang <jasowang@...hat.com> To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com> Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, "Michael S. Tsirkin" <mst@...hat.com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>, virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org Subject: Re: [PATCH net-next v1 07/19] virtio_net: separate virtnet_tx_resize() On Mon, Oct 16, 2023 at 8:00 PM Xuan Zhuo <xuanzhuo@...ux.alibaba.com> wrote: > > This patch separates two sub-functions from virtnet_tx_resize(): > > * virtnet_tx_pause > * virtnet_tx_resume > > Then the subsequent virtnet_tx_reset() can share these two functions. > > Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com> Acked-by: Jason Wang <jasowang@...hat.com> Thanks > --- > drivers/net/virtio/main.c | 35 +++++++++++++++++++++++++++------ > drivers/net/virtio/virtio_net.h | 2 ++ > 2 files changed, 31 insertions(+), 6 deletions(-) > > diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c > index e6b262341619..8da84ea9bcbe 100644 > --- a/drivers/net/virtio/main.c > +++ b/drivers/net/virtio/main.c > @@ -2156,12 +2156,11 @@ static int virtnet_rx_resize(struct virtnet_info *vi, > return err; > } > > -static int virtnet_tx_resize(struct virtnet_info *vi, > - struct virtnet_sq *sq, u32 ring_num) > +void virtnet_tx_pause(struct virtnet_info *vi, struct virtnet_sq *sq) > { > bool running = netif_running(vi->dev); > struct netdev_queue *txq; > - int err, qindex; > + int qindex; > > qindex = sq - vi->sq; > > @@ -2182,10 +2181,17 @@ static int virtnet_tx_resize(struct virtnet_info *vi, > netif_stop_subqueue(vi->dev, qindex); > > __netif_tx_unlock_bh(txq); > +} > > - err = virtqueue_resize(sq->vq, ring_num, virtnet_sq_free_unused_buf); > - if (err) > - netdev_err(vi->dev, "resize tx fail: tx queue index: %d err: %d\n", qindex, err); > +void virtnet_tx_resume(struct virtnet_info *vi, struct virtnet_sq *sq) > +{ > + bool running = netif_running(vi->dev); > + struct netdev_queue *txq; > + int qindex; > + > + qindex = sq - vi->sq; > + > + txq = netdev_get_tx_queue(vi->dev, qindex); > > __netif_tx_lock_bh(txq); > sq->reset = false; > @@ -2194,6 +2200,23 @@ static int virtnet_tx_resize(struct virtnet_info *vi, > > if (running) > virtnet_napi_tx_enable(vi, sq->vq, &sq->napi); > +} > + > +static int virtnet_tx_resize(struct virtnet_info *vi, struct virtnet_sq *sq, > + u32 ring_num) > +{ > + int qindex, err; > + > + qindex = sq - vi->sq; > + > + virtnet_tx_pause(vi, sq); > + > + err = virtqueue_resize(sq->vq, ring_num, virtnet_sq_free_unused_buf); > + if (err) > + netdev_err(vi->dev, "resize tx fail: tx queue index: %d err: %d\n", qindex, err); > + > + virtnet_tx_resume(vi, sq); > + > return err; > } > > diff --git a/drivers/net/virtio/virtio_net.h b/drivers/net/virtio/virtio_net.h > index 70eea23adba6..2f930af35364 100644 > --- a/drivers/net/virtio/virtio_net.h > +++ b/drivers/net/virtio/virtio_net.h > @@ -256,4 +256,6 @@ static inline bool virtnet_is_xdp_raw_buffer_queue(struct virtnet_info *vi, int > > void virtnet_rx_pause(struct virtnet_info *vi, struct virtnet_rq *rq); > void virtnet_rx_resume(struct virtnet_info *vi, struct virtnet_rq *rq); > +void virtnet_tx_pause(struct virtnet_info *vi, struct virtnet_sq *sq); > +void virtnet_tx_resume(struct virtnet_info *vi, struct virtnet_sq *sq); > #endif > -- > 2.32.0.3.g01195cf9f >
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