From patchwork Mon Aug 2 10:26:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 490622 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C284C4320A for ; Mon, 2 Aug 2021 10:27:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED11660F5A for ; Mon, 2 Aug 2021 10:27:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233231AbhHBK12 (ORCPT ); Mon, 2 Aug 2021 06:27:28 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:25382 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S233105AbhHBK10 (ORCPT ); Mon, 2 Aug 2021 06:27:26 -0400 X-IronPort-AV: E=Sophos;i="5.84,288,1620658800"; d="scan'208";a="89548939" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 02 Aug 2021 19:27:16 +0900 Received: from localhost.localdomain (unknown [10.226.92.138]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 3DD2B4009BDB; Mon, 2 Aug 2021 19:27:10 +0900 (JST) From: Biju Das To: "David S. Miller" , Jakub Kicinski Cc: Biju Das , Sergei Shtylyov , Geert Uytterhoeven , Sergey Shtylyov , Adam Ford , Andrew Lunn , Yuusuke Ashizuka , Yoshihiro Shimoda , netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Chris Paterson , Biju Das , Prabhakar Mahadev Lad Subject: [PATCH net-next v2 2/8] ravb: Add skb_sz to struct ravb_hw_info Date: Mon, 2 Aug 2021 11:26:48 +0100 Message-Id: <20210802102654.5996-3-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210802102654.5996-1-biju.das.jz@bp.renesas.com> References: <20210802102654.5996-1-biju.das.jz@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The maximum descriptor size that can be specified on the reception side for R-Car is 2048 bytes, whereas for RZ/G2L it is 8096. Add the skb_size variable to struct ravb_hw_info for allocating different skb buffer sizes for R-Car and RZ/G2L using the netdev_alloc_skb function. Signed-off-by: Biju Das Reviewed-by: Lad Prabhakar Reviewed-by: Andrew Lunn --- v2: * Incorporated Andrew and Sergei's review comments for making it smaller patch and provided detailed description. --- drivers/net/ethernet/renesas/ravb.h | 1 + drivers/net/ethernet/renesas/ravb_main.c | 10 ++++++---- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index cfb972c05b34..16d1711a0731 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -991,6 +991,7 @@ enum ravb_chip_id { struct ravb_hw_info { enum ravb_chip_id chip_id; int num_tx_desc; + size_t skb_sz; }; struct ravb_private { diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index ffbd224d8780..08146c1975e5 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -339,6 +339,7 @@ static void ravb_ring_format(struct net_device *ndev, int q) static int ravb_ring_init(struct net_device *ndev, int q) { struct ravb_private *priv = netdev_priv(ndev); + const struct ravb_hw_info *info = priv->info; int num_tx_desc = priv->num_tx_desc; struct sk_buff *skb; int ring_size; @@ -353,7 +354,7 @@ static int ravb_ring_init(struct net_device *ndev, int q) goto error; for (i = 0; i < priv->num_rx_ring[q]; i++) { - skb = netdev_alloc_skb(ndev, RX_BUF_SZ + RAVB_ALIGN - 1); + skb = netdev_alloc_skb(ndev, info->skb_sz); if (!skb) goto error; ravb_set_buffer_align(skb); @@ -535,6 +536,7 @@ static void ravb_rx_csum(struct sk_buff *skb) static bool ravb_rx(struct net_device *ndev, int *quota, int q) { struct ravb_private *priv = netdev_priv(ndev); + const struct ravb_hw_info *info = priv->info; int entry = priv->cur_rx[q] % priv->num_rx_ring[q]; int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) - priv->cur_rx[q]; @@ -619,9 +621,7 @@ static bool ravb_rx(struct net_device *ndev, int *quota, int q) desc->ds_cc = cpu_to_le16(RX_BUF_SZ); if (!priv->rx_skb[q][entry]) { - skb = netdev_alloc_skb(ndev, - RX_BUF_SZ + - RAVB_ALIGN - 1); + skb = netdev_alloc_skb(ndev, info->skb_sz); if (!skb) break; /* Better luck next round. */ ravb_set_buffer_align(skb); @@ -1927,11 +1927,13 @@ static int ravb_mdio_release(struct ravb_private *priv) static const struct ravb_hw_info ravb_gen3_hw_info = { .chip_id = RCAR_GEN3, .num_tx_desc = NUM_TX_DESC_GEN3, + .skb_sz = RX_BUF_SZ + RAVB_ALIGN - 1, }; static const struct ravb_hw_info ravb_gen2_hw_info = { .chip_id = RCAR_GEN2, .num_tx_desc = NUM_TX_DESC_GEN2, + .skb_sz = RX_BUF_SZ + RAVB_ALIGN - 1, }; static const struct of_device_id ravb_match_table[] = {