From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
To: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Xuan Zhuo <xuanzhuo@linux.alibaba.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
virtualization@lists.linux-foundation.org, bpf@vger.kernel.org
Subject: [PATCH net-next v3 02/27] virtio_net: unify the code for recycling the xmit ptr
Date: Fri, 29 Dec 2023 15:30:43 +0800 [thread overview]
Message-ID: <20231229073108.57778-3-xuanzhuo@linux.alibaba.com> (raw)
In-Reply-To: <20231229073108.57778-1-xuanzhuo@linux.alibaba.com>
There are two completely similar and independent implementations. This
is inconvenient for the subsequent addition of new types. So extract a
function from this piece of code and call this function uniformly to
recover old xmit ptr.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
drivers/net/virtio_net.c | 66 +++++++++++++++++-----------------------
1 file changed, 28 insertions(+), 38 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 7929f5d9d059..b01afd19061f 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -351,6 +351,30 @@ static struct xdp_frame *ptr_to_xdp(void *ptr)
return (struct xdp_frame *)((unsigned long)ptr & ~VIRTIO_XDP_FLAG);
}
+static void __free_old_xmit(struct send_queue *sq, bool in_napi,
+ u64 *bytes, u64 *packets)
+{
+ unsigned int len;
+ void *ptr;
+
+ while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
+ if (!is_xdp_frame(ptr)) {
+ struct sk_buff *skb = ptr;
+
+ pr_debug("Sent skb %p\n", skb);
+
+ *bytes += skb->len;
+ napi_consume_skb(skb, in_napi);
+ } else {
+ struct xdp_frame *frame = ptr_to_xdp(ptr);
+
+ *bytes += xdp_get_frame_len(frame);
+ xdp_return_frame(frame);
+ }
+ (*packets)++;
+ }
+}
+
/* Converting between virtqueue no. and kernel tx/rx queue no.
* 0:rx0 1:tx0 2:rx1 3:tx1 ... 2N:rxN 2N+1:txN 2N+2:cvq
*/
@@ -759,27 +783,9 @@ static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf)
static void free_old_xmit(struct send_queue *sq, bool in_napi)
{
- unsigned int len;
- unsigned int packets = 0;
- unsigned int bytes = 0;
- void *ptr;
-
- while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
- if (likely(!is_xdp_frame(ptr))) {
- struct sk_buff *skb = ptr;
-
- pr_debug("Sent skb %p\n", skb);
+ u64 bytes = 0, packets = 0;
- bytes += skb->len;
- napi_consume_skb(skb, in_napi);
- } else {
- struct xdp_frame *frame = ptr_to_xdp(ptr);
-
- bytes += xdp_get_frame_len(frame);
- xdp_return_frame(frame);
- }
- packets++;
- }
+ __free_old_xmit(sq, in_napi, &bytes, &packets);
/* Avoid overhead when no packets have been processed
* happens when called speculatively from start_xmit.
@@ -929,14 +935,11 @@ static int virtnet_xdp_xmit(struct net_device *dev,
{
struct virtnet_info *vi = netdev_priv(dev);
struct receive_queue *rq = vi->rq;
+ u64 bytes = 0, packets = 0;
struct bpf_prog *xdp_prog;
struct send_queue *sq;
- unsigned int len;
- int packets = 0;
- int bytes = 0;
int nxmit = 0;
int kicks = 0;
- void *ptr;
int ret;
int i;
@@ -955,20 +958,7 @@ static int virtnet_xdp_xmit(struct net_device *dev,
}
/* Free up any pending old buffers before queueing new ones. */
- while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
- if (likely(is_xdp_frame(ptr))) {
- struct xdp_frame *frame = ptr_to_xdp(ptr);
-
- bytes += xdp_get_frame_len(frame);
- xdp_return_frame(frame);
- } else {
- struct sk_buff *skb = ptr;
-
- bytes += skb->len;
- napi_consume_skb(skb, false);
- }
- packets++;
- }
+ __free_old_xmit(sq, false, &bytes, &packets);
for (i = 0; i < n; i++) {
struct xdp_frame *xdpf = frames[i];
--
2.32.0.3.g01195cf9f
next prev parent reply other threads:[~2023-12-29 7:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-29 7:30 [PATCH net-next v3 00/27] virtio-net: support AF_XDP zero copy Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 01/27] virtio_net: rename free_old_xmit_skbs to free_old_xmit Xuan Zhuo
2023-12-29 7:30 ` Xuan Zhuo [this message]
2023-12-29 7:30 ` [PATCH net-next v3 03/27] virtio_net: independent directory Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 04/27] virtio_net: move core structures to virtio_net.h Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 05/27] virtio_net: add prefix virtnet to all struct inside virtio_net.h Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 06/27] virtio_ring: introduce virtqueue_get_buf_ctx_dma() Xuan Zhuo
2024-01-11 8:34 ` Jason Wang
2024-01-16 7:32 ` Xuan Zhuo
2024-01-22 4:18 ` Jason Wang
2024-01-22 6:04 ` Xuan Zhuo
2024-01-22 6:54 ` Jason Wang
2023-12-29 7:30 ` [PATCH net-next v3 07/27] virtio_ring: virtqueue_disable_and_recycle let the callback detach bufs Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 08/27] virtio_ring: introduce virtqueue_detach_unused_buf_dma() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 09/27] virtio_ring: introduce virtqueue_get_dma_premapped() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 10/27] virtio_net: sq support premapped mode Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 11/27] virtio_net: separate virtnet_rx_resize() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 12/27] virtio_net: separate virtnet_tx_resize() Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 13/27] virtio_net: xsk: bind/unbind xsk Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 14/27] virtio_net: xsk: prevent disable tx napi Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 15/27] virtio_net: move some api to header Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 16/27] virtio_net: xsk: tx: support xmit xsk buffer Xuan Zhuo
2023-12-30 0:28 ` kernel test robot
2023-12-29 7:30 ` [PATCH net-next v3 17/27] virtio_net: xsk: tx: support wakeup Xuan Zhuo
2023-12-29 7:30 ` [PATCH net-next v3 18/27] virtio_net: xsk: tx: handle the transmitted xsk buffer Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 19/27] virtio_net: xsk: tx: free the unused " Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 20/27] virtio_net: separate receive_mergeable Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 21/27] virtio_net: separate receive_buf Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 22/27] virtio_net: xsk: rx: support fill with xsk buffer Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 23/27] virtio_net: xsk: rx: support recv merge mode Xuan Zhuo
2023-12-29 21:03 ` kernel test robot
2023-12-30 1:01 ` kernel test robot
2023-12-29 7:31 ` [PATCH net-next v3 24/27] virtio_net: xsk: rx: support recv small mode Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 25/27] virtio_net: xsk: rx: free the unused xsk buffer Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 26/27] virtio_net: update tx timeout record Xuan Zhuo
2023-12-29 7:31 ` [PATCH net-next v3 27/27] virtio_net: xdp_features add NETDEV_XDP_ACT_XSK_ZEROCOPY Xuan Zhuo
2024-01-11 3:27 ` [PATCH net-next v3 00/27] virtio-net: support AF_XDP zero copy Jason Wang
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