From patchwork Mon Apr 10 15:57:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Yoong Siang X-Patchwork-Id: 13206473 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD551C77B70 for ; Mon, 10 Apr 2023 15:58:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230114AbjDJP6u (ORCPT ); Mon, 10 Apr 2023 11:58:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37662 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230092AbjDJP6s (ORCPT ); Mon, 10 Apr 2023 11:58:48 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2938C30F6; Mon, 10 Apr 2023 08:58:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681142291; x=1712678291; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=M9jRW3+HhGvO5QbLOE/WrixZZSlVBopsf2U3mliQfB8=; b=dcp1PGaeViZKqomTqvgFFu+9AAgiAOYuN5saxJr7pT7KoNk1XMPXWL5V SpQ1LncRrxttDY8KlZQkCDl/cw//ayaqncHYa2dvXF8JJNlQr0Zla5rUZ AXD4QFKVGe5AUegKKPd+iHtHyMOFOQBHUZkmOBrG92eq8uMySjgFBPrqU OaSzDYA3445StWYbIBBqlNIJa0zpyeIbwqw+PJ6A5AcLHybhlXk8br60E VLQVOX2F+/y47LCY0CfCGE2NoXfRQcK/H9GxMtz0EpwfxENN5f1yQanK5 j2c/WG+65zIkmV83ntkQcGkkRYYR50hA6OqiTYqAkXwrgtwDVFB3orimC w==; X-IronPort-AV: E=McAfee;i="6600,9927,10676"; a="343391682" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="343391682" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2023 08:58:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10676"; a="777601688" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="777601688" Received: from p12ill20yoongsia.png.intel.com ([10.88.227.28]) by FMSMGA003.fm.intel.com with ESMTP; 10 Apr 2023 08:57:56 -0700 From: Song Yoong Siang To: Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Alexander Duyck , Ong Boon Leong Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, xdp-hints@xdp-project.net, Song Yoong Siang Subject: [PATCH net-next v2 1/4] net: stmmac: restructure Rx hardware timestamping function Date: Mon, 10 Apr 2023 23:57:19 +0800 Message-Id: <20230410155722.335908-2-yoong.siang.song@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410155722.335908-1-yoong.siang.song@intel.com> References: <20230410155722.335908-1-yoong.siang.song@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Ong Boon Leong Rearrange the function of getting Rx hardware timestamp for skb so that it can be reused for XDP later. Signed-off-by: Ong Boon Leong Signed-off-by: Song Yoong Siang --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 21 ++++++++++++------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 04fbb7770618..2cc6237a9c28 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -570,15 +570,14 @@ static void stmmac_get_tx_hwtstamp(struct stmmac_priv *priv, * @priv: driver private structure * @p : descriptor pointer * @np : next descriptor pointer - * @skb : the socket buffer + * @hwtstamp : hardware timestamp * Description : * This function will read received packet's timestamp from the descriptor * and pass it to stack. It also perform some sanity checks. */ static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p, - struct dma_desc *np, struct sk_buff *skb) + struct dma_desc *np, ktime_t *hwtstamp) { - struct skb_shared_hwtstamps *shhwtstamp = NULL; struct dma_desc *desc = p; u64 ns = 0; @@ -595,9 +594,7 @@ static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p, ns -= priv->plat->cdc_error_adj; netdev_dbg(priv->dev, "get valid RX hw timestamp %llu\n", ns); - shhwtstamp = skb_hwtstamps(skb); - memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); - shhwtstamp->hwtstamp = ns_to_ktime(ns); + *hwtstamp = ns_to_ktime(ns); } else { netdev_dbg(priv->dev, "cannot get RX hw timestamp\n"); } @@ -4909,6 +4906,7 @@ static void stmmac_dispatch_skb_zc(struct stmmac_priv *priv, u32 queue, struct xdp_buff *xdp) { struct stmmac_channel *ch = &priv->channel[queue]; + struct skb_shared_hwtstamps *shhwtstamp = NULL; unsigned int len = xdp->data_end - xdp->data; enum pkt_hash_types hash_type; int coe = priv->hw->rx_csum; @@ -4921,7 +4919,10 @@ static void stmmac_dispatch_skb_zc(struct stmmac_priv *priv, u32 queue, return; } - stmmac_get_rx_hwtstamp(priv, p, np, skb); + shhwtstamp = skb_hwtstamps(skb); + memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); + stmmac_get_rx_hwtstamp(priv, p, np, &shhwtstamp->hwtstamp); + stmmac_rx_vlan(priv->dev, skb); skb->protocol = eth_type_trans(skb, priv->dev); @@ -5213,6 +5214,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) rx_q->dma_rx_phy, desc_size); } while (count < limit) { + struct skb_shared_hwtstamps *shhwtstamp = NULL; unsigned int buf1_len = 0, buf2_len = 0; enum pkt_hash_types hash_type; struct stmmac_rx_buffer *buf; @@ -5407,7 +5409,10 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) /* Got entire packet into SKB. Finish it. */ - stmmac_get_rx_hwtstamp(priv, p, np, skb); + shhwtstamp = skb_hwtstamps(skb); + memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); + stmmac_get_rx_hwtstamp(priv, p, np, &shhwtstamp->hwtstamp); + stmmac_rx_vlan(priv->dev, skb); skb->protocol = eth_type_trans(skb, priv->dev); From patchwork Mon Apr 10 15:57:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Yoong Siang X-Patchwork-Id: 13206474 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7DD4AC77B61 for ; Mon, 10 Apr 2023 15:58:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230113AbjDJP6v (ORCPT ); Mon, 10 Apr 2023 11:58:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230112AbjDJP6t (ORCPT ); Mon, 10 Apr 2023 11:58:49 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0AF163AA1; Mon, 10 Apr 2023 08:58:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681142294; x=1712678294; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Cpc+vWCiVUmsOySpGlMg+6/vKyP6bVmouafrvWfaSpU=; b=kzOdlsJiBNzy+PcCnU3m4pdrnyaoIBRidtJm6jq5EZSa+cBF50QUFW3h gqGNECwQMUPS+0SyE/IQTTIJKcJ0qphNNuxP2dr9qlF7vUP5LH3RAw4Da RJzka/+ekx/LIYhqqQONsGEKNtRGbuvel0A4EOR52BSOB+n3SDjzSCMrV RPN598xjxKi/cQ32vP4Emjs3EFWvcZDH01gYAwTnbYFwu3gFyvBasC5bO ZzqNlJI64bnDpRzHkY36zYy2QxNPHyFHkjMKR7isqP/NjO1sl0UjZslDm DKk6asNDFk8oEaxhzv75JjGpaR9K4q+oTm2Af8fZWBdUHh8pcPdAycgZT w==; X-IronPort-AV: E=McAfee;i="6600,9927,10676"; a="343391727" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="343391727" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2023 08:58:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10676"; a="777601736" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="777601736" Received: from p12ill20yoongsia.png.intel.com ([10.88.227.28]) by FMSMGA003.fm.intel.com with ESMTP; 10 Apr 2023 08:58:04 -0700 From: Song Yoong Siang To: Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Alexander Duyck , Ong Boon Leong Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, xdp-hints@xdp-project.net, Song Yoong Siang Subject: [PATCH net-next v2 2/4] net: stmmac: introduce wrapper for struct xdp_buff Date: Mon, 10 Apr 2023 23:57:20 +0800 Message-Id: <20230410155722.335908-3-yoong.siang.song@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410155722.335908-1-yoong.siang.song@intel.com> References: <20230410155722.335908-1-yoong.siang.song@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Introduce struct stmmac_xdp_buff as a preparation to support XDP Rx metadata via kfuncs. Signed-off-by: Song Yoong Siang --- drivers/net/ethernet/stmicro/stmmac/stmmac.h | 4 ++++ .../net/ethernet/stmicro/stmmac/stmmac_main.c | 18 +++++++++--------- 2 files changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 3d15e1e92e18..ac8ccf851708 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -92,6 +92,10 @@ struct stmmac_rx_buffer { dma_addr_t sec_addr; }; +struct stmmac_xdp_buff { + struct xdp_buff xdp; +}; + struct stmmac_rx_queue { u32 rx_count_frames; u32 queue_index; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 2cc6237a9c28..f7bbdf04d20c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -5189,9 +5189,9 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) int status = 0, coe = priv->hw->rx_csum; unsigned int next_entry = rx_q->cur_rx; enum dma_data_direction dma_dir; + struct stmmac_xdp_buff ctx = {}; unsigned int desc_size; struct sk_buff *skb = NULL; - struct xdp_buff xdp; int xdp_status = 0; int buf_sz; @@ -5313,17 +5313,17 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) dma_sync_single_for_cpu(priv->device, buf->addr, buf1_len, dma_dir); - xdp_init_buff(&xdp, buf_sz, &rx_q->xdp_rxq); - xdp_prepare_buff(&xdp, page_address(buf->page), + xdp_init_buff(&ctx.xdp, buf_sz, &rx_q->xdp_rxq); + xdp_prepare_buff(&ctx.xdp, page_address(buf->page), buf->page_offset, buf1_len, false); - pre_len = xdp.data_end - xdp.data_hard_start - + pre_len = ctx.xdp.data_end - ctx.xdp.data_hard_start - buf->page_offset; - skb = stmmac_xdp_run_prog(priv, &xdp); + skb = stmmac_xdp_run_prog(priv, &ctx.xdp); /* Due xdp_adjust_tail: DMA sync for_device * cover max len CPU touch */ - sync_len = xdp.data_end - xdp.data_hard_start - + sync_len = ctx.xdp.data_end - ctx.xdp.data_hard_start - buf->page_offset; sync_len = max(sync_len, pre_len); @@ -5333,7 +5333,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) if (xdp_res & STMMAC_XDP_CONSUMED) { page_pool_put_page(rx_q->page_pool, - virt_to_head_page(xdp.data), + virt_to_head_page(ctx.xdp.data), sync_len, true); buf->page = NULL; priv->dev->stats.rx_dropped++; @@ -5361,7 +5361,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) if (!skb) { /* XDP program may expand or reduce tail */ - buf1_len = xdp.data_end - xdp.data; + buf1_len = ctx.xdp.data_end - ctx.xdp.data; skb = napi_alloc_skb(&ch->rx_napi, buf1_len); if (!skb) { @@ -5371,7 +5371,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) } /* XDP program may adjust header */ - skb_copy_to_linear_data(skb, xdp.data, buf1_len); + skb_copy_to_linear_data(skb, ctx.xdp.data, buf1_len); skb_put(skb, buf1_len); /* Data payload copied into SKB, page ready for recycle */ From patchwork Mon Apr 10 15:57:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Yoong Siang X-Patchwork-Id: 13206475 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34B25C77B70 for ; Mon, 10 Apr 2023 15:59:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230158AbjDJP7F (ORCPT ); Mon, 10 Apr 2023 11:59:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230137AbjDJP7A (ORCPT ); Mon, 10 Apr 2023 11:59:00 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DAACE63; Mon, 10 Apr 2023 08:58:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; 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d="scan'208";a="777601767" Received: from p12ill20yoongsia.png.intel.com ([10.88.227.28]) by FMSMGA003.fm.intel.com with ESMTP; 10 Apr 2023 08:58:12 -0700 From: Song Yoong Siang To: Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Alexander Duyck , Ong Boon Leong Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, xdp-hints@xdp-project.net, Song Yoong Siang Subject: [PATCH net-next v2 3/4] net: stmmac: add Rx HWTS metadata to XDP receive pkt Date: Mon, 10 Apr 2023 23:57:21 +0800 Message-Id: <20230410155722.335908-4-yoong.siang.song@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410155722.335908-1-yoong.siang.song@intel.com> References: <20230410155722.335908-1-yoong.siang.song@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Add receive hardware timestamp metadata support via kfunc to XDP receive packets. Signed-off-by: Song Yoong Siang --- drivers/net/ethernet/stmicro/stmmac/stmmac.h | 1 + .../net/ethernet/stmicro/stmmac/stmmac_main.c | 24 +++++++++++++++++-- 2 files changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index ac8ccf851708..760445275da8 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -94,6 +94,7 @@ struct stmmac_rx_buffer { struct stmmac_xdp_buff { struct xdp_buff xdp; + ktime_t rx_hwts; }; struct stmmac_rx_queue { diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index f7bbdf04d20c..7f1c0c36de8c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -5307,6 +5307,8 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) } } + stmmac_get_rx_hwtstamp(priv, p, np, &ctx.rx_hwts); + if (!skb) { unsigned int pre_len, sync_len; @@ -5315,7 +5317,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) xdp_init_buff(&ctx.xdp, buf_sz, &rx_q->xdp_rxq); xdp_prepare_buff(&ctx.xdp, page_address(buf->page), - buf->page_offset, buf1_len, false); + buf->page_offset, buf1_len, true); pre_len = ctx.xdp.data_end - ctx.xdp.data_hard_start - buf->page_offset; @@ -5411,7 +5413,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) shhwtstamp = skb_hwtstamps(skb); memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); - stmmac_get_rx_hwtstamp(priv, p, np, &shhwtstamp->hwtstamp); + shhwtstamp->hwtstamp = ctx.rx_hwts; stmmac_rx_vlan(priv->dev, skb); skb->protocol = eth_type_trans(skb, priv->dev); @@ -7071,6 +7073,22 @@ void stmmac_fpe_handshake(struct stmmac_priv *priv, bool enable) } } +static int stmmac_xdp_rx_timestamp(const struct xdp_md *_ctx, u64 *timestamp) +{ + const struct stmmac_xdp_buff *ctx = (void *)_ctx; + + if (ctx->rx_hwts) { + *timestamp = ctx->rx_hwts; + return 0; + } + + return -ENODATA; +} + +static const struct xdp_metadata_ops stmmac_xdp_metadata_ops = { + .xmo_rx_timestamp = stmmac_xdp_rx_timestamp, +}; + /** * stmmac_dvr_probe * @device: device pointer @@ -7178,6 +7196,8 @@ int stmmac_dvr_probe(struct device *device, ndev->netdev_ops = &stmmac_netdev_ops; + ndev->xdp_metadata_ops = &stmmac_xdp_metadata_ops; + ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM; ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | From patchwork Mon Apr 10 15:57:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Yoong Siang X-Patchwork-Id: 13206476 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A41FDC77B70 for ; Mon, 10 Apr 2023 15:59:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230187AbjDJP7M (ORCPT ); Mon, 10 Apr 2023 11:59:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229953AbjDJP7E (ORCPT ); Mon, 10 Apr 2023 11:59:04 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 102A62D5A; Mon, 10 Apr 2023 08:58:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681142329; x=1712678329; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=7CyX8+iAb3kw4nJuS0qncc4N2aFERAptrvfH4AgZhAg=; b=MDo8sR+TGFjPyXw33RNAlhuj24FtjqmdBI/4Rj+t0Uj0aUvKynmN4Fin ulLDzaIhaVSNZ3Qc7g6aD+AkVUrAvRmQDKkDbfwT+HUIqyt6k+9egcJCS jlLsyB8QuUA7Mtld3o4DRd4WUrUMIR6KKbojB2DbbUzNlQUyBDl2z8TRy OouEJs37EhVhjkjHQndO4w31a5gkwj8DjL01J0o+ZLLRrXR7LvBuQkYa9 nkAhquMtvg8T2XcD3JUjXOIgvXM/qrsBMV+4cTvGmoDZaCO+lJCYv/51Z W40cD/EtR5iIjLqG5swIpi2f3RiGIiqijMlZ5AZgfdiB9ijXyvN2dj8kv g==; X-IronPort-AV: E=McAfee;i="6600,9927,10676"; a="343391855" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="343391855" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2023 08:58:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10676"; a="777601811" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="777601811" Received: from p12ill20yoongsia.png.intel.com ([10.88.227.28]) by FMSMGA003.fm.intel.com with ESMTP; 10 Apr 2023 08:58:22 -0700 From: Song Yoong Siang To: Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Alexander Duyck , Ong Boon Leong Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, xdp-hints@xdp-project.net, Song Yoong Siang Subject: [PATCH net-next v2 4/4] net: stmmac: add Rx HWTS metadata to XDP ZC receive pkt Date: Mon, 10 Apr 2023 23:57:22 +0800 Message-Id: <20230410155722.335908-5-yoong.siang.song@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410155722.335908-1-yoong.siang.song@intel.com> References: <20230410155722.335908-1-yoong.siang.song@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Add receive hardware timestamp metadata support via kfunc to XDP Zero Copy receive packets. Signed-off-by: Song Yoong Siang --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 29 +++++++++++++++++-- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 7f1c0c36de8c..bcaafeea118b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1611,6 +1611,12 @@ static int stmmac_alloc_rx_buffers_zc(struct stmmac_priv *priv, struct stmmac_rx_queue *rx_q = &dma_conf->rx_queue[queue]; int i; + /* struct stmmac_xdp_buff is using cb field (maximum size of 24 bytes) + * in struct xdp_buff_xsk to stash driver specific information. Thus, + * use this macro to make sure no size violations. + */ + XSK_CHECK_PRIV_TYPE(struct stmmac_xdp_buff); + for (i = 0; i < dma_conf->dma_rx_size; i++) { struct stmmac_rx_buffer *buf; dma_addr_t dma_addr; @@ -4903,7 +4909,7 @@ static struct sk_buff *stmmac_construct_skb_zc(struct stmmac_channel *ch, static void stmmac_dispatch_skb_zc(struct stmmac_priv *priv, u32 queue, struct dma_desc *p, struct dma_desc *np, - struct xdp_buff *xdp) + struct xdp_buff *xdp, ktime_t rx_hwts) { struct stmmac_channel *ch = &priv->channel[queue]; struct skb_shared_hwtstamps *shhwtstamp = NULL; @@ -4921,7 +4927,7 @@ static void stmmac_dispatch_skb_zc(struct stmmac_priv *priv, u32 queue, shhwtstamp = skb_hwtstamps(skb); memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); - stmmac_get_rx_hwtstamp(priv, p, np, &shhwtstamp->hwtstamp); + shhwtstamp->hwtstamp = rx_hwts; stmmac_rx_vlan(priv->dev, skb); skb->protocol = eth_type_trans(skb, priv->dev); @@ -4999,6 +5005,16 @@ static bool stmmac_rx_refill_zc(struct stmmac_priv *priv, u32 queue, u32 budget) return ret; } +static struct stmmac_xdp_buff *xsk_buff_to_stmmac_ctx(struct xdp_buff *xdp) +{ + /* In XDP zero copy data path, xdp field in struct xdp_buff_xsk is used + * to represent incoming packet, whereas cb field in the same structure + * is used to store driver specific info. Thus, struct stmmac_xdp_buff + * is laid on top of xdp and cb fields of struct xdp_buff_xsk. + */ + return (struct stmmac_xdp_buff *)xdp; +} + static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) { struct stmmac_rx_queue *rx_q = &priv->dma_conf.rx_queue[queue]; @@ -5028,8 +5044,10 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) } while (count < limit) { struct stmmac_rx_buffer *buf; + struct stmmac_xdp_buff *ctx; unsigned int buf1_len = 0; struct dma_desc *np, *p; + ktime_t rx_hwts = 0; int entry; int res; @@ -5113,6 +5131,10 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) goto read_again; } + stmmac_get_rx_hwtstamp(priv, p, np, &rx_hwts); + ctx = xsk_buff_to_stmmac_ctx(buf->xdp); + ctx->rx_hwts = rx_hwts; + /* XDP ZC Frame only support primary buffers for now */ buf1_len = stmmac_rx_buf1_len(priv, p, status, len); len += buf1_len; @@ -5132,7 +5154,8 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) switch (res) { case STMMAC_XDP_PASS: - stmmac_dispatch_skb_zc(priv, queue, p, np, buf->xdp); + stmmac_dispatch_skb_zc(priv, queue, p, np, buf->xdp, + rx_hwts); xsk_buff_free(buf->xdp); break; case STMMAC_XDP_CONSUMED: