From patchwork Mon Mar 29 07:55:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 411385 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 6D55BC43459 for ; Mon, 29 Mar 2021 08:30:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 456316195B for ; Mon, 29 Mar 2021 08:30:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233802AbhC2I37 (ORCPT ); Mon, 29 Mar 2021 04:29:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:43598 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234347AbhC2I2L (ORCPT ); Mon, 29 Mar 2021 04:28:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 71C1A614A7; Mon, 29 Mar 2021 08:27:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617006457; bh=kND7Cz2zXPj+L8zoy0kdq0IzF1L4MlyVpJsPhHES+DI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=npNFjthbsHwmkj2MG17Gfo5qsB+sPLJIUjlwqkMlBvgd25T81WN/pqh86wZFcvsWj jSJCp8KrbwLa8++O5dsX8aEC17vCdMshFO9jsi1RkcYV+tBbpSPBbcOOtH4iCkGAna OBLk0PFMkBf+rWEfAMsdjjDq1VcXV5VTA1xeR7EA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alex Marginean , Claudiu Manoil , Jason Liu , Vladimir Oltean , "David S. Miller" , Sasha Levin Subject: [PATCH 5.11 026/254] net: enetc: set MAC RX FIFO to recommended value Date: Mon, 29 Mar 2021 09:55:42 +0200 Message-Id: <20210329075634.004206230@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075633.135869143@linuxfoundation.org> References: <20210329075633.135869143@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alex Marginean [ Upstream commit 1b2395dfff5bb40228a187f21f577cd90673d344 ] On LS1028A, the MAC RX FIFO defaults to the value 2, which is too high and may lead to RX lock-up under traffic at a rate higher than 6 Gbps. Set it to 1 instead, as recommended by the hardware design team and by later versions of the ENETC block guide. Signed-off-by: Alex Marginean Reviewed-by: Claudiu Manoil Reviewed-by: Jason Liu Signed-off-by: Vladimir Oltean Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/freescale/enetc/enetc_hw.h | 2 ++ drivers/net/ethernet/freescale/enetc/enetc_pf.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/net/ethernet/freescale/enetc/enetc_hw.h b/drivers/net/ethernet/freescale/enetc/enetc_hw.h index de0d20b0f489..00938f7960a4 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_hw.h +++ b/drivers/net/ethernet/freescale/enetc/enetc_hw.h @@ -234,6 +234,8 @@ enum enetc_bdr_type {TX, RX}; #define ENETC_PM0_MAXFRM 0x8014 #define ENETC_SET_TX_MTU(val) ((val) << 16) #define ENETC_SET_MAXFRM(val) ((val) & 0xffff) +#define ENETC_PM0_RX_FIFO 0x801c +#define ENETC_PM0_RX_FIFO_VAL 1 #define ENETC_PM_IMDIO_BASE 0x8030 diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c index ca02f033bea2..224fc37a6757 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c @@ -490,6 +490,12 @@ static void enetc_configure_port_mac(struct enetc_hw *hw) enetc_port_wr(hw, ENETC_PM1_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN | ENETC_PM0_CMD_TXP | ENETC_PM0_PROMISC); + + /* On LS1028A, the MAC RX FIFO defaults to 2, which is too high + * and may lead to RX lock-up under traffic. Set it to 1 instead, + * as recommended by the hardware team. + */ + enetc_port_wr(hw, ENETC_PM0_RX_FIFO, ENETC_PM0_RX_FIFO_VAL); } static void enetc_mac_config(struct enetc_hw *hw, phy_interface_t phy_mode)