From patchwork Wed Oct 30 08:24:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 13856107 X-Patchwork-Delegate: kuba@kernel.org Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5A6CB1E201C; Wed, 30 Oct 2024 08:25:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.100 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730276712; cv=none; b=ruasQjW54YswTXlBY/3XtNIWL0kAm3Viap9DgRMITty0r2KbwZ1MUS8gfmfG3WyJZxpOsVrDlK2NyuHOgS/esCDq5shsiVMXXqGCkAsKwZMFTuujspDkTwUmnZC+KJzZ3yXwHkImP1d5BBS0onkyg5PRBnRbXLIXLWdQPzuFp1U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730276712; c=relaxed/simple; bh=o33/iuXJvX53yFY4Q1uL1uROK6+j2OYdKs+SHOwpyZg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=nWLcxWWpLQMW3pSwxJXjwv41W8IRR+YhP1XXGnAUU1ZS7KzRluv+LI/6xl+ZCS6F4E7+ImY9c5D5UTa0LtDXAMtDem6zik5aC0g/QNm63m4FqycFMh0A20UiJ775F/xhobTMjgO8TVFSNXZ2kKnHYvmaX3ZRbh64Z6bZ4s9oQE8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=iTDHse2H; arc=none smtp.client-ip=115.124.30.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="iTDHse2H" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1730276704; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=VK7WtAzvv/SyRzJ6XyamVbRFpFwDbRGMoKWxDfSvIr4=; b=iTDHse2HX1qfXKPBHl6ScjrrKOMDHHKaYed6vqy31M/x4G/bOUo13yz+iLw5Xbjddf16+rDjka/tZBquKZhQYTBPSgouGQQ88PnAWuVRPAbHdP2j1e7TBe0ma657BnT3iOGu4JjK8TTZFYkjAWLSn4QlSH8Bi1YpiM+OLmxj51s= Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0WIDFbWr_1730276702 cluster:ay36) by smtp.aliyun-inc.com; Wed, 30 Oct 2024 16:25:03 +0800 From: Xuan Zhuo To: netdev@vger.kernel.org Cc: "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?utf-8?q?Eugenio_P=C3=A9rez?= , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , virtualization@lists.linux.dev, bpf@vger.kernel.org Subject: [PATCH net-next v2 09/13] virtio_net: xsk: bind/unbind xsk for tx Date: Wed, 30 Oct 2024 16:24:49 +0800 Message-Id: <20241030082453.97310-10-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20241030082453.97310-1-xuanzhuo@linux.alibaba.com> References: <20241030082453.97310-1-xuanzhuo@linux.alibaba.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Git-Hash: 87bfcb32ef14 X-Patchwork-Delegate: kuba@kernel.org This patch implement the logic of bind/unbind xsk pool to sq and rq. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 53 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 37e86e0a1d8e..2d2658fcad07 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -295,6 +295,10 @@ struct send_queue { /* Record whether sq is in reset state. */ bool reset; + + struct xsk_buff_pool *xsk_pool; + + dma_addr_t xsk_hdr_dma_addr; }; /* Internal representation of a receive virtqueue */ @@ -497,6 +501,8 @@ struct virtio_net_common_hdr { }; }; +static struct virtio_net_common_hdr xsk_hdr; + static void virtnet_sq_free_unused_buf(struct virtqueue *vq, void *buf); static int virtnet_xdp_handler(struct bpf_prog *xdp_prog, struct xdp_buff *xdp, struct net_device *dev, @@ -5496,6 +5502,29 @@ static int virtnet_rq_bind_xsk_pool(struct virtnet_info *vi, struct receive_queu return err; } +static int virtnet_sq_bind_xsk_pool(struct virtnet_info *vi, + struct send_queue *sq, + struct xsk_buff_pool *pool) +{ + int err, qindex; + + qindex = sq - vi->sq; + + virtnet_tx_pause(vi, sq); + + err = virtqueue_reset(sq->vq, virtnet_sq_free_unused_buf); + if (err) { + netdev_err(vi->dev, "reset tx fail: tx queue index: %d err: %d\n", qindex, err); + pool = NULL; + } + + sq->xsk_pool = pool; + + virtnet_tx_resume(vi, sq); + + return err; +} + static int virtnet_xsk_pool_enable(struct net_device *dev, struct xsk_buff_pool *pool, u16 qid) @@ -5504,6 +5533,7 @@ static int virtnet_xsk_pool_enable(struct net_device *dev, struct receive_queue *rq; struct device *dma_dev; struct send_queue *sq; + dma_addr_t hdr_dma; int err, size; if (vi->hdr_len > xsk_pool_get_headroom(pool)) @@ -5541,6 +5571,11 @@ static int virtnet_xsk_pool_enable(struct net_device *dev, if (!rq->xsk_buffs) return -ENOMEM; + hdr_dma = virtqueue_dma_map_single_attrs(sq->vq, &xsk_hdr, vi->hdr_len, + DMA_TO_DEVICE, 0); + if (virtqueue_dma_mapping_error(sq->vq, hdr_dma)) + return -ENOMEM; + err = xsk_pool_dma_map(pool, dma_dev, 0); if (err) goto err_xsk_map; @@ -5549,11 +5584,24 @@ static int virtnet_xsk_pool_enable(struct net_device *dev, if (err) goto err_rq; + err = virtnet_sq_bind_xsk_pool(vi, sq, pool); + if (err) + goto err_sq; + + /* Now, we do not support tx offload(such as tx csum), so all the tx + * virtnet hdr is zero. So all the tx packets can share a single hdr. + */ + sq->xsk_hdr_dma_addr = hdr_dma; + return 0; +err_sq: + virtnet_rq_bind_xsk_pool(vi, rq, NULL); err_rq: xsk_pool_dma_unmap(pool, 0); err_xsk_map: + virtqueue_dma_unmap_single_attrs(rq->vq, hdr_dma, vi->hdr_len, + DMA_TO_DEVICE, 0); return err; } @@ -5562,19 +5610,24 @@ static int virtnet_xsk_pool_disable(struct net_device *dev, u16 qid) struct virtnet_info *vi = netdev_priv(dev); struct xsk_buff_pool *pool; struct receive_queue *rq; + struct send_queue *sq; int err; if (qid >= vi->curr_queue_pairs) return -EINVAL; + sq = &vi->sq[qid]; rq = &vi->rq[qid]; pool = rq->xsk_pool; err = virtnet_rq_bind_xsk_pool(vi, rq, NULL); + err |= virtnet_sq_bind_xsk_pool(vi, sq, NULL); xsk_pool_dma_unmap(pool, 0); + virtqueue_dma_unmap_single_attrs(sq->vq, sq->xsk_hdr_dma_addr, + vi->hdr_len, DMA_TO_DEVICE, 0); kvfree(rq->xsk_buffs); return err;