From patchwork Wed Apr 12 09:42:35 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: 13208699 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 7EB1AC77B6E for ; Wed, 12 Apr 2023 09:44:35 +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=wIDvw8o5/Q9C9E7JLCZsUMs6S0+bXWF74Tk0QAicfvk=; b=boWPd6hxZikO+M P3SHySrwzQLMwbfxtx8IO1jEWSP/jva41KwojWDsp6istRan15sgO+6ojATEs9StLASiB9copr6YK hullBNCvfbSflVyDJh845IHQLDY14J6bB9sdppWkzai2c63DwlEyB94pB7uUrvIGB49K5G09MJ1Sh DzrcpH1IHhqfZyk71qPQO60WEibeUeNLWk1+bfBQ55HMKfbccZxcAmM3mvO/y/P5pHbi9OmhaK9PX z50qOo7p89DCY2J3ljURBAsTN+nx3Q22VkmYwNifae7EceANaxkFcHbIdaUOQJFfpbCkBzY8PPUHD atzYLGHMBI8fWj2QubjA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pmX13-002Ri9-0U; Wed, 12 Apr 2023 09:43:49 +0000 Received: from mga03.intel.com ([134.134.136.65]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pmX10-002RgN-0V for linux-arm-kernel@lists.infradead.org; Wed, 12 Apr 2023 09:43:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681292626; x=1712828626; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=LwEHEzc7bD+80SZfiRcNMHZOLAyRIwPq6TVR/GpsF7s=; b=fcIBJlSuCcMeU2IKjtOhoATQ3OWgvWyDB5mBmmQNqb34JADJoFvHbpFB E+dzHsEadE/78GxW15s2gainU8BB2payTNEoszrjH4T5OYBS5hTW1Oi7a 1m7dZRhGw5vadcDaHVCjCNcjOcc5fcRxokfhc8dYwLJ66NtGYKIzfa+z3 LyRt9e00YhZYbEE2sAtNdT8hnbh3cqaAojg++XSxeO8rOBZOs2p7qoDHv Ujo00W+0xzs0qiu++4OFMBThfs5VLW1iRfmttow5uAcT9fzAatRyyI99O Ns6eFs6n4dx2VmFqhtKezypMFpjWVSFzhATbVYUQ837CXjr6Jw3nuYQcJ A==; X-IronPort-AV: E=McAfee;i="6600,9927,10677"; a="346526479" X-IronPort-AV: E=Sophos;i="5.98,338,1673942400"; d="scan'208";a="346526479" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2023 02:43:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10677"; a="682430970" X-IronPort-AV: E=Sophos;i="5.98,338,1673942400"; d="scan'208";a="682430970" Received: from p12ill20yoongsia.png.intel.com ([10.88.227.28]) by orsmga007.jf.intel.com with ESMTP; 12 Apr 2023 02:43:38 -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 v3 4/4] net: stmmac: add Rx HWTS metadata to XDP ZC receive pkt Date: Wed, 12 Apr 2023 17:42:35 +0800 Message-Id: <20230412094235.589089-5-yoong.siang.song@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230412094235.589089-1-yoong.siang.song@intel.com> References: <20230412094235.589089-1-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_024346_286165_720B8696 X-CRM114-Status: GOOD ( 13.63 ) 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 ed660927b628..1c4dbac90717 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; @@ -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]; @@ -5028,6 +5044,7 @@ 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; @@ -5113,6 +5130,11 @@ 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;