From patchwork Thu Apr 13 03:25:41 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: 13209768 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2775EC77B6C for ; Thu, 13 Apr 2023 04:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kR+PaR7os1ySiqxfuLvSUv9CXloMv7iaAQxT3I51HTU=; b=l0FBYS37TigOw7 Zi0HFG91PGHwmUgNnHwuYxPeDM/0fIJ68iDD7m39wIbuJFecbj7R82DKHMbBbyKUOIeJU7apjFTVM GjSDIg9+hxeaLSFEt2haA6REkkMk7sCyWYMnZzjfX9uHsH1ZfivAHXxoNeOA86ayZI5hncUyDsexS sne9tJeJOh/qIprVKSrWhKZn7054GQTtbsWSQOEtZ0x0KUsGnHloy4+LJKmkNkW6yb9zI7MgXdfs3 evn6bW9pkdka+AUo27AhjB+WIAd+/cTxpomKSc2tpd3EUPUYIRMqb2ziXQtuYcZWW6BdiTZy24FHF EgLw6edu8+PbfEsi7Lgg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pmobW-0050HT-0I; Thu, 13 Apr 2023 04:30:38 +0000 Received: from mga02.intel.com ([134.134.136.20]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pmnbc-004tn3-1V for linux-arm-kernel@lists.infradead.org; Thu, 13 Apr 2023 03:26:41 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681356400; x=1712892400; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=uJGAj1dfOd8XxqdoXjmCOKtKsk7xuP8pGuTOMXLVpzw=; b=jVjRiu2VBgZNt3N2ztfolmQBxkmAPZ7xu/SVN8UB50LPrxnp6VQ4NHBs GEax/bv3hhBzXGok+wQ5pwZo/wcDvODw8leU/STcExyQ9XciGz+JiUw+x TsumTqpI/gQlpnK6Tx28+JPOSTpMULpyO1U9iOLzk6HwLw6Y5J9OyNnCQ R5uQ+RbFxHuL8Og1VNjJOkframH4alSGUxns83r4/X2ylWCnnNbXBL0O7 8t/LLoW3/zYk/Zk7eGyG3CQ5DjnWl6ObcpBkCx71mmw5bsIZO/YOz0TVC QU+S2JhyDgr4Ta7T+FygN0KEFy6n6vgtVoevrSRlOChxHzej+rGnROa+5 w==; X-IronPort-AV: E=McAfee;i="6600,9927,10678"; a="332781742" X-IronPort-AV: E=Sophos;i="5.98,339,1673942400"; d="scan'208";a="332781742" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2023 20:26:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10678"; a="800597218" X-IronPort-AV: E=Sophos;i="5.98,339,1673942400"; d="scan'208";a="800597218" Received: from p12ill20yoongsia.png.intel.com ([10.88.227.28]) by fmsmga002.fm.intel.com with ESMTP; 12 Apr 2023 20:26:34 -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 v4 3/3] net: stmmac: add Rx HWTS metadata to XDP ZC receive pkt Date: Thu, 13 Apr 2023 11:25:41 +0800 Message-Id: <20230413032541.885238-4-yoong.siang.song@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230413032541.885238-1-yoong.siang.song@intel.com> References: <20230413032541.885238-1-yoong.siang.song@intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230412_202640_548941_B900D871 X-CRM114-Status: GOOD ( 16.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 831a3e22e0d8..25ec39aa3bf0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1614,6 +1614,12 @@ 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; @@ -4998,6 +5004,16 @@ 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]; @@ -5027,6 +5043,7 @@ 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; int entry; @@ -5112,6 +5129,11 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) goto read_again; } + ctx = xsk_buff_to_stmmac_ctx(buf->xdp); + ctx->priv = priv; + ctx->p = p; + ctx->np = np; + /* XDP ZC Frame only support primary buffers for now */ buf1_len = stmmac_rx_buf1_len(priv, p, status, len); len += buf1_len;