From patchwork Tue Nov 14 05:55:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13454830 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 B2995D310 for ; Tue, 14 Nov 2023 05:55:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91D68D44 for ; Mon, 13 Nov 2023 21:55:52 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R771e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046056;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VwOHHta_1699941349; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VwOHHta_1699941349) by smtp.aliyun-inc.com; Tue, 14 Nov 2023 13:55:50 +0800 From: Heng Qi To: netdev@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Jason Wang , "Michael S . Tsirkin" , Eric Dumazet , Paolo Abeni , "David S . Miller" , Jesper Dangaard Brouer , John Fastabend , Alexei Starovoitov , Simon Horman , Jakub Kicinski , xuanzhuo@linux.alibaba.com Subject: [PATCH net-next v3 1/5] virtio-net: returns whether napi is complete Date: Tue, 14 Nov 2023 13:55:43 +0800 Message-Id: <4497004c8ba06fdb621689e40c2f801c493c83ea.1699938946.git.hengqi@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org rx netdim needs to count the traffic during a complete napi process, and start updating and comparing samples to make decisions after the napi ends. Let virtqueue_napi_complete() return true if napi is done, otherwise vice versa. Signed-off-by: Heng Qi Acked-by: Jason Wang --- drivers/net/virtio_net.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index d16f592c2061..0ad2894e6a5e 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -431,7 +431,7 @@ static void virtqueue_napi_schedule(struct napi_struct *napi, } } -static void virtqueue_napi_complete(struct napi_struct *napi, +static bool virtqueue_napi_complete(struct napi_struct *napi, struct virtqueue *vq, int processed) { int opaque; @@ -440,9 +440,13 @@ static void virtqueue_napi_complete(struct napi_struct *napi, if (napi_complete_done(napi, processed)) { if (unlikely(virtqueue_poll(vq, opaque))) virtqueue_napi_schedule(napi, vq); + else + return true; } else { virtqueue_disable_cb(vq); } + + return false; } static void skb_xmit_done(struct virtqueue *vq) From patchwork Tue Nov 14 05:55:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13454831 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 8BA5410A36 for ; Tue, 14 Nov 2023 05:55:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-99.freemail.mail.aliyun.com (out30-99.freemail.mail.aliyun.com [115.124.30.99]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4EA8D42 for ; Mon, 13 Nov 2023 21:55:53 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VwOFUJk_1699941350; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VwOFUJk_1699941350) by smtp.aliyun-inc.com; Tue, 14 Nov 2023 13:55:51 +0800 From: Heng Qi To: netdev@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Jason Wang , "Michael S . Tsirkin" , Eric Dumazet , Paolo Abeni , "David S . Miller" , Jesper Dangaard Brouer , John Fastabend , Alexei Starovoitov , Simon Horman , Jakub Kicinski , xuanzhuo@linux.alibaba.com Subject: [PATCH net-next v3 2/5] virtio-net: separate rx/tx coalescing moderation cmds Date: Tue, 14 Nov 2023 13:55:44 +0800 Message-Id: X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org This patch separates the rx and tx global coalescing moderation commands to support netdim switches in subsequent patches. Signed-off-by: Heng Qi Acked-by: Jason Wang --- drivers/net/virtio_net.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 0ad2894e6a5e..0285301caf78 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3266,10 +3266,10 @@ static int virtnet_get_link_ksettings(struct net_device *dev, return 0; } -static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi, - struct ethtool_coalesce *ec) +static int virtnet_send_tx_notf_coal_cmds(struct virtnet_info *vi, + struct ethtool_coalesce *ec) { - struct scatterlist sgs_tx, sgs_rx; + struct scatterlist sgs_tx; int i; vi->ctrl->coal_tx.tx_usecs = cpu_to_le32(ec->tx_coalesce_usecs); @@ -3289,6 +3289,15 @@ static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi, vi->sq[i].intr_coal.max_packets = ec->tx_max_coalesced_frames; } + return 0; +} + +static int virtnet_send_rx_notf_coal_cmds(struct virtnet_info *vi, + struct ethtool_coalesce *ec) +{ + struct scatterlist sgs_rx; + int i; + vi->ctrl->coal_rx.rx_usecs = cpu_to_le32(ec->rx_coalesce_usecs); vi->ctrl->coal_rx.rx_max_packets = cpu_to_le32(ec->rx_max_coalesced_frames); sg_init_one(&sgs_rx, &vi->ctrl->coal_rx, sizeof(vi->ctrl->coal_rx)); @@ -3309,6 +3318,22 @@ static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi, return 0; } +static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi, + struct ethtool_coalesce *ec) +{ + int err; + + err = virtnet_send_tx_notf_coal_cmds(vi, ec); + if (err) + return err; + + err = virtnet_send_rx_notf_coal_cmds(vi, ec); + if (err) + return err; + + return 0; +} + static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi, u16 vqn, u32 max_usecs, u32 max_packets) { From patchwork Tue Nov 14 05:55:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13454832 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 2E51C11734 for ; Tue, 14 Nov 2023 05:55:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42E8F1BC for ; Mon, 13 Nov 2023 21:55:55 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R811e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046049;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VwOPCgH_1699941351; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VwOPCgH_1699941351) by smtp.aliyun-inc.com; Tue, 14 Nov 2023 13:55:52 +0800 From: Heng Qi To: netdev@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Jason Wang , "Michael S . Tsirkin" , Eric Dumazet , Paolo Abeni , "David S . Miller" , Jesper Dangaard Brouer , John Fastabend , Alexei Starovoitov , Simon Horman , Jakub Kicinski , xuanzhuo@linux.alibaba.com Subject: [PATCH net-next v3 3/5] virtio-net: extract virtqueue coalescig cmd for reuse Date: Tue, 14 Nov 2023 13:55:45 +0800 Message-Id: <2eeceac3fca52bbd72dc596ccea9ec92f1307cd5.1699938946.git.hengqi@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Extract commands to set virtqueue coalescing parameters for reuse by ethtool -Q, vq resize and netdim. Signed-off-by: Heng Qi Acked-by: Jason Wang --- drivers/net/virtio_net.c | 106 +++++++++++++++++++++++---------------- 1 file changed, 64 insertions(+), 42 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 0285301caf78..69fe09e99b3c 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2849,6 +2849,58 @@ static void virtnet_cpu_notif_remove(struct virtnet_info *vi) &vi->node_dead); } +static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi, + u16 vqn, u32 max_usecs, u32 max_packets) +{ + struct scatterlist sgs; + + vi->ctrl->coal_vq.vqn = cpu_to_le16(vqn); + vi->ctrl->coal_vq.coal.max_usecs = cpu_to_le32(max_usecs); + vi->ctrl->coal_vq.coal.max_packets = cpu_to_le32(max_packets); + sg_init_one(&sgs, &vi->ctrl->coal_vq, sizeof(vi->ctrl->coal_vq)); + + if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL, + VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET, + &sgs)) + return -EINVAL; + + return 0; +} + +static int virtnet_send_rx_ctrl_coal_vq_cmd(struct virtnet_info *vi, + u16 queue, u32 max_usecs, + u32 max_packets) +{ + int err; + + err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(queue), + max_usecs, max_packets); + if (err) + return err; + + vi->rq[queue].intr_coal.max_usecs = max_usecs; + vi->rq[queue].intr_coal.max_packets = max_packets; + + return 0; +} + +static int virtnet_send_tx_ctrl_coal_vq_cmd(struct virtnet_info *vi, + u16 queue, u32 max_usecs, + u32 max_packets) +{ + int err; + + err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(queue), + max_usecs, max_packets); + if (err) + return err; + + vi->sq[queue].intr_coal.max_usecs = max_usecs; + vi->sq[queue].intr_coal.max_packets = max_packets; + + return 0; +} + static void virtnet_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring, struct kernel_ethtool_ringparam *kernel_ring, @@ -2906,14 +2958,11 @@ static int virtnet_set_ringparam(struct net_device *dev, * through the VIRTIO_NET_CTRL_NOTF_COAL_TX_SET command, or, if the driver * did not set any TX coalescing parameters, to 0. */ - err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(i), - vi->intr_coal_tx.max_usecs, - vi->intr_coal_tx.max_packets); + err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, i, + vi->intr_coal_tx.max_usecs, + vi->intr_coal_tx.max_packets); if (err) return err; - - vi->sq[i].intr_coal.max_usecs = vi->intr_coal_tx.max_usecs; - vi->sq[i].intr_coal.max_packets = vi->intr_coal_tx.max_packets; } if (ring->rx_pending != rx_pending) { @@ -2922,14 +2971,11 @@ static int virtnet_set_ringparam(struct net_device *dev, return err; /* The reason is same as the transmit virtqueue reset */ - err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(i), - vi->intr_coal_rx.max_usecs, - vi->intr_coal_rx.max_packets); + err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, i, + vi->intr_coal_rx.max_usecs, + vi->intr_coal_rx.max_packets); if (err) return err; - - vi->rq[i].intr_coal.max_usecs = vi->intr_coal_rx.max_usecs; - vi->rq[i].intr_coal.max_packets = vi->intr_coal_rx.max_packets; } } @@ -3334,48 +3380,24 @@ static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi, return 0; } -static int virtnet_send_ctrl_coal_vq_cmd(struct virtnet_info *vi, - u16 vqn, u32 max_usecs, u32 max_packets) -{ - struct scatterlist sgs; - - vi->ctrl->coal_vq.vqn = cpu_to_le16(vqn); - vi->ctrl->coal_vq.coal.max_usecs = cpu_to_le32(max_usecs); - vi->ctrl->coal_vq.coal.max_packets = cpu_to_le32(max_packets); - sg_init_one(&sgs, &vi->ctrl->coal_vq, sizeof(vi->ctrl->coal_vq)); - - if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL, - VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET, - &sgs)) - return -EINVAL; - - return 0; -} - static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi, struct ethtool_coalesce *ec, u16 queue) { int err; - err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(queue), - ec->rx_coalesce_usecs, - ec->rx_max_coalesced_frames); + err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, queue, + ec->rx_coalesce_usecs, + ec->rx_max_coalesced_frames); if (err) return err; - vi->rq[queue].intr_coal.max_usecs = ec->rx_coalesce_usecs; - vi->rq[queue].intr_coal.max_packets = ec->rx_max_coalesced_frames; - - err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(queue), - ec->tx_coalesce_usecs, - ec->tx_max_coalesced_frames); + err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, queue, + ec->tx_coalesce_usecs, + ec->tx_max_coalesced_frames); if (err) return err; - vi->sq[queue].intr_coal.max_usecs = ec->tx_coalesce_usecs; - vi->sq[queue].intr_coal.max_packets = ec->tx_max_coalesced_frames; - return 0; } From patchwork Tue Nov 14 05:55:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13454834 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 73AB2125AC for ; Tue, 14 Nov 2023 05:55:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A1291BF for ; Mon, 13 Nov 2023 21:55:56 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R311e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046059;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VwOCX48_1699941353; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VwOCX48_1699941353) by smtp.aliyun-inc.com; Tue, 14 Nov 2023 13:55:54 +0800 From: Heng Qi To: netdev@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Jason Wang , "Michael S . Tsirkin" , Eric Dumazet , Paolo Abeni , "David S . Miller" , Jesper Dangaard Brouer , John Fastabend , Alexei Starovoitov , Simon Horman , Jakub Kicinski , xuanzhuo@linux.alibaba.com Subject: [PATCH net-next v3 4/5] virtio-net: support rx netdim Date: Tue, 14 Nov 2023 13:55:46 +0800 Message-Id: X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org By comparing the traffic information in the complete napi processes, let the virtio-net driver automatically adjust the coalescing moderation parameters of each receive queue. Signed-off-by: Heng Qi --- v2->v3: - Some minor modifications. v1->v2: - Improved the judgment of dim switch conditions. - Cancel the work when vq reset. drivers/net/virtio_net.c | 191 ++++++++++++++++++++++++++++++++++----- 1 file changed, 169 insertions(+), 22 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 69fe09e99b3c..bc32d5aae005 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -172,6 +173,17 @@ struct receive_queue { struct virtnet_rq_stats stats; + /* The number of rx notifications */ + u16 calls; + + /* Is dynamic interrupt moderation enabled? */ + bool dim_enabled; + + /* Dynamic Interrupt Moderation */ + struct dim dim; + + u32 packets_in_napi; + struct virtnet_interrupt_coalesce intr_coal; /* Chain pages by the private ptr. */ @@ -305,6 +317,9 @@ struct virtnet_info { u8 duplex; u32 speed; + /* Is rx dynamic interrupt moderation enabled? */ + bool rx_dim_enabled; + /* Interrupt coalescing settings */ struct virtnet_interrupt_coalesce intr_coal_tx; struct virtnet_interrupt_coalesce intr_coal_rx; @@ -2001,6 +2016,7 @@ static void skb_recv_done(struct virtqueue *rvq) struct virtnet_info *vi = rvq->vdev->priv; struct receive_queue *rq = &vi->rq[vq2rxq(rvq)]; + rq->calls++; virtqueue_napi_schedule(&rq->napi, rvq); } @@ -2141,6 +2157,26 @@ static void virtnet_poll_cleantx(struct receive_queue *rq) } } +static void virtnet_rx_dim_work(struct work_struct *work); + +static void virtnet_rx_dim_update(struct virtnet_info *vi, struct receive_queue *rq) +{ + struct dim_sample cur_sample = {}; + + if (!rq->packets_in_napi) + return; + + u64_stats_update_begin(&rq->stats.syncp); + dim_update_sample(rq->calls, + u64_stats_read(&rq->stats.packets), + u64_stats_read(&rq->stats.bytes), + &cur_sample); + u64_stats_update_end(&rq->stats.syncp); + + net_dim(&rq->dim, cur_sample); + rq->packets_in_napi = 0; +} + static int virtnet_poll(struct napi_struct *napi, int budget) { struct receive_queue *rq = @@ -2149,17 +2185,22 @@ static int virtnet_poll(struct napi_struct *napi, int budget) struct send_queue *sq; unsigned int received; unsigned int xdp_xmit = 0; + bool napi_complete; virtnet_poll_cleantx(rq); received = virtnet_receive(rq, budget, &xdp_xmit); + rq->packets_in_napi += received; if (xdp_xmit & VIRTIO_XDP_REDIR) xdp_do_flush(); /* Out of packets? */ - if (received < budget) - virtqueue_napi_complete(napi, rq->vq, received); + if (received < budget) { + napi_complete = virtqueue_napi_complete(napi, rq->vq, received); + if (napi_complete && rq->dim_enabled) + virtnet_rx_dim_update(vi, rq); + } if (xdp_xmit & VIRTIO_XDP_TX) { sq = virtnet_xdp_get_sq(vi); @@ -2179,6 +2220,7 @@ static void virtnet_disable_queue_pair(struct virtnet_info *vi, int qp_index) virtnet_napi_tx_disable(&vi->sq[qp_index].napi); napi_disable(&vi->rq[qp_index].napi); xdp_rxq_info_unreg(&vi->rq[qp_index].xdp_rxq); + cancel_work_sync(&vi->rq[qp_index].dim.work); } static int virtnet_enable_queue_pair(struct virtnet_info *vi, int qp_index) @@ -2196,6 +2238,9 @@ static int virtnet_enable_queue_pair(struct virtnet_info *vi, int qp_index) if (err < 0) goto err_xdp_reg_mem_model; + INIT_WORK(&vi->rq[qp_index].dim.work, virtnet_rx_dim_work); + vi->rq[qp_index].dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; + virtnet_napi_enable(vi->rq[qp_index].vq, &vi->rq[qp_index].napi); virtnet_napi_tx_enable(vi, vi->sq[qp_index].vq, &vi->sq[qp_index].napi); @@ -2393,8 +2438,10 @@ static int virtnet_rx_resize(struct virtnet_info *vi, qindex = rq - vi->rq; - if (running) + if (running) { napi_disable(&rq->napi); + cancel_work_sync(&rq->dim.work); + } err = virtqueue_resize(rq->vq, ring_num, virtnet_rq_free_unused_buf); if (err) @@ -2403,8 +2450,10 @@ static int virtnet_rx_resize(struct virtnet_info *vi, if (!try_fill_recv(vi, rq, GFP_KERNEL)) schedule_delayed_work(&vi->refill, 0); - if (running) + if (running) { + INIT_WORK(&rq->dim.work, virtnet_rx_dim_work); virtnet_napi_enable(rq->vq, &rq->napi); + } return err; } @@ -3341,24 +3390,55 @@ static int virtnet_send_tx_notf_coal_cmds(struct virtnet_info *vi, static int virtnet_send_rx_notf_coal_cmds(struct virtnet_info *vi, struct ethtool_coalesce *ec) { + bool rx_ctrl_dim_on = !!ec->use_adaptive_rx_coalesce; + bool update = false, switch_dim; struct scatterlist sgs_rx; int i; - vi->ctrl->coal_rx.rx_usecs = cpu_to_le32(ec->rx_coalesce_usecs); - vi->ctrl->coal_rx.rx_max_packets = cpu_to_le32(ec->rx_max_coalesced_frames); - sg_init_one(&sgs_rx, &vi->ctrl->coal_rx, sizeof(vi->ctrl->coal_rx)); - - if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL, - VIRTIO_NET_CTRL_NOTF_COAL_RX_SET, - &sgs_rx)) - return -EINVAL; + switch_dim = rx_ctrl_dim_on != vi->rx_dim_enabled; + if (switch_dim) { + if (rx_ctrl_dim_on) { + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL)) { + vi->rx_dim_enabled = true; + for (i = 0; i < vi->max_queue_pairs; i++) + vi->rq[i].dim_enabled = true; + } else { + return -EOPNOTSUPP; + } + } else { + vi->rx_dim_enabled = false; + for (i = 0; i < vi->max_queue_pairs; i++) + vi->rq[i].dim_enabled = false; + } + } else { + if (ec->rx_coalesce_usecs != vi->intr_coal_rx.max_usecs || + ec->rx_max_coalesced_frames != vi->intr_coal_rx.max_packets) + update = true; - /* Save parameters */ - vi->intr_coal_rx.max_usecs = ec->rx_coalesce_usecs; - vi->intr_coal_rx.max_packets = ec->rx_max_coalesced_frames; - for (i = 0; i < vi->max_queue_pairs; i++) { - vi->rq[i].intr_coal.max_usecs = ec->rx_coalesce_usecs; - vi->rq[i].intr_coal.max_packets = ec->rx_max_coalesced_frames; + if (vi->rx_dim_enabled) { + if (update) + return -EINVAL; + } else { + /* Since the per-queue coalescing params can be set, + * we need apply the global new params even if they + * are not updated. + */ + vi->ctrl->coal_rx.rx_usecs = cpu_to_le32(ec->rx_coalesce_usecs); + vi->ctrl->coal_rx.rx_max_packets = cpu_to_le32(ec->rx_max_coalesced_frames); + sg_init_one(&sgs_rx, &vi->ctrl->coal_rx, sizeof(vi->ctrl->coal_rx)); + + if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_NOTF_COAL, + VIRTIO_NET_CTRL_NOTF_COAL_RX_SET, + &sgs_rx)) + return -EINVAL; + + vi->intr_coal_rx.max_usecs = ec->rx_coalesce_usecs; + vi->intr_coal_rx.max_packets = ec->rx_max_coalesced_frames; + for (i = 0; i < vi->max_queue_pairs; i++) { + vi->rq[i].intr_coal.max_usecs = ec->rx_coalesce_usecs; + vi->rq[i].intr_coal.max_packets = ec->rx_max_coalesced_frames; + } + } } return 0; @@ -3380,15 +3460,54 @@ static int virtnet_send_notf_coal_cmds(struct virtnet_info *vi, return 0; } +static int virtnet_send_rx_notf_coal_vq_cmds(struct virtnet_info *vi, + struct ethtool_coalesce *ec, + u16 queue) +{ + bool rx_ctrl_dim_on = !!ec->use_adaptive_rx_coalesce; + bool cur_rx_dim = vi->rq[queue].dim_enabled; + bool update = false, switch_dim; + u32 max_usecs, max_packets; + int err; + + switch_dim = rx_ctrl_dim_on != cur_rx_dim; + if (switch_dim) { + if (rx_ctrl_dim_on) + vi->rq[queue].dim_enabled = true; + else + vi->rq[queue].dim_enabled = false; + } else { + max_usecs = vi->rq[queue].intr_coal.max_usecs; + max_packets = vi->rq[queue].intr_coal.max_packets; + if (ec->rx_coalesce_usecs != max_usecs || + ec->rx_max_coalesced_frames != max_packets) + update = true; + + if (cur_rx_dim) { + if (update) + return -EINVAL; + } else { + if (!update) + return 0; + + err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, queue, + ec->rx_coalesce_usecs, + ec->rx_max_coalesced_frames); + if (err) + return err; + } + } + + return 0; +} + static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi, struct ethtool_coalesce *ec, u16 queue) { int err; - err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, queue, - ec->rx_coalesce_usecs, - ec->rx_max_coalesced_frames); + err = virtnet_send_rx_notf_coal_vq_cmds(vi, ec, queue); if (err) return err; @@ -3401,6 +3520,32 @@ static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi, return 0; } +static void virtnet_rx_dim_work(struct work_struct *work) +{ + struct dim *dim = container_of(work, struct dim, work); + struct receive_queue *rq = container_of(dim, + struct receive_queue, dim); + struct virtnet_info *vi = rq->vq->vdev->priv; + struct net_device *dev = vi->dev; + struct dim_cq_moder update_moder; + int qnum = rq - vi->rq, err; + + update_moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix); + if (update_moder.usec != vi->rq[qnum].intr_coal.max_usecs || + update_moder.pkts != vi->rq[qnum].intr_coal.max_packets) { + rtnl_lock(); + err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, qnum, + update_moder.usec, + update_moder.pkts); + if (err) + pr_debug("%s: Failed to send dim parameters on rxq%d\n", + dev->name, (int)(rq - vi->rq)); + rtnl_unlock(); + } + + dim->state = DIM_START_MEASURE; +} + static int virtnet_coal_params_supported(struct ethtool_coalesce *ec) { /* usecs coalescing is supported only if VIRTIO_NET_F_NOTF_COAL @@ -3482,6 +3627,7 @@ static int virtnet_get_coalesce(struct net_device *dev, ec->tx_coalesce_usecs = vi->intr_coal_tx.max_usecs; ec->tx_max_coalesced_frames = vi->intr_coal_tx.max_packets; ec->rx_max_coalesced_frames = vi->intr_coal_rx.max_packets; + ec->use_adaptive_rx_coalesce = vi->rx_dim_enabled; } else { ec->rx_max_coalesced_frames = 1; @@ -3539,6 +3685,7 @@ static int virtnet_get_per_queue_coalesce(struct net_device *dev, ec->tx_coalesce_usecs = vi->sq[queue].intr_coal.max_usecs; ec->tx_max_coalesced_frames = vi->sq[queue].intr_coal.max_packets; ec->rx_max_coalesced_frames = vi->rq[queue].intr_coal.max_packets; + ec->use_adaptive_rx_coalesce = vi->rq[queue].dim_enabled; } else { ec->rx_max_coalesced_frames = 1; @@ -3664,7 +3811,7 @@ static int virtnet_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info) static const struct ethtool_ops virtnet_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_MAX_FRAMES | - ETHTOOL_COALESCE_USECS, + ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_USE_ADAPTIVE_RX, .get_drvinfo = virtnet_get_drvinfo, .get_link = ethtool_op_get_link, .get_ringparam = virtnet_get_ringparam, From patchwork Tue Nov 14 05:55:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13454833 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 62684125BC for ; Tue, 14 Nov 2023 05:55:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDBC9D42 for ; Mon, 13 Nov 2023 21:55:57 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VwOFULA_1699941354; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VwOFULA_1699941354) by smtp.aliyun-inc.com; Tue, 14 Nov 2023 13:55:55 +0800 From: Heng Qi To: netdev@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Jason Wang , "Michael S . Tsirkin" , Eric Dumazet , Paolo Abeni , "David S . Miller" , Jesper Dangaard Brouer , John Fastabend , Alexei Starovoitov , Simon Horman , Jakub Kicinski , xuanzhuo@linux.alibaba.com Subject: [PATCH net-next v3 5/5] virtio-net: return -EOPNOTSUPP for adaptive-tx Date: Tue, 14 Nov 2023 13:55:47 +0800 Message-Id: <6a79229fbeb72edf41185a45a0f9ea5cd87a1086.1699938946.git.hengqi@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org We do not currently support tx dim, so respond to -EOPNOTSUPP. Signed-off-by: Heng Qi --- v1->v2: - Use -EOPNOTSUPP instead of specific implementation. drivers/net/virtio_net.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index bc32d5aae005..b082f2acbb22 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3364,9 +3364,15 @@ static int virtnet_get_link_ksettings(struct net_device *dev, static int virtnet_send_tx_notf_coal_cmds(struct virtnet_info *vi, struct ethtool_coalesce *ec) { + bool tx_ctrl_dim_on = !!ec->use_adaptive_tx_coalesce; struct scatterlist sgs_tx; int i; + if (tx_ctrl_dim_on) { + pr_debug("Failed to enable adaptive-tx, which is not supported\n"); + return -EOPNOTSUPP; + } + vi->ctrl->coal_tx.tx_usecs = cpu_to_le32(ec->tx_coalesce_usecs); vi->ctrl->coal_tx.tx_max_packets = cpu_to_le32(ec->tx_max_coalesced_frames); sg_init_one(&sgs_tx, &vi->ctrl->coal_tx, sizeof(vi->ctrl->coal_tx)); @@ -3501,6 +3507,25 @@ static int virtnet_send_rx_notf_coal_vq_cmds(struct virtnet_info *vi, return 0; } +static int virtnet_send_tx_notf_coal_vq_cmds(struct virtnet_info *vi, + struct ethtool_coalesce *ec, + u16 queue) +{ + bool tx_ctrl_dim_on = !!ec->use_adaptive_tx_coalesce; + int err; + + if (tx_ctrl_dim_on) { + pr_debug("Enabling adaptive-tx for txq%d is not supported\n", queue); + return -EOPNOTSUPP; + } + + err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, queue, + ec->tx_coalesce_usecs, + ec->tx_max_coalesced_frames); + + return err; +} + static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi, struct ethtool_coalesce *ec, u16 queue) @@ -3511,9 +3536,7 @@ static int virtnet_send_notf_coal_vq_cmds(struct virtnet_info *vi, if (err) return err; - err = virtnet_send_tx_ctrl_coal_vq_cmd(vi, queue, - ec->tx_coalesce_usecs, - ec->tx_max_coalesced_frames); + err = virtnet_send_tx_notf_coal_vq_cmds(vi, ec, queue); if (err) return err;