From patchwork Mon Nov 23 03:45:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qingfang Deng X-Patchwork-Id: 1404622 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=puwQs1Jg; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CfY3b48ltz9sRR for ; Mon, 23 Nov 2020 14:46:19 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727393AbgKWDps (ORCPT ); Sun, 22 Nov 2020 22:45:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726407AbgKWDps (ORCPT ); Sun, 22 Nov 2020 22:45:48 -0500 Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 308DEC0613CF for ; Sun, 22 Nov 2020 19:45:46 -0800 (PST) Received: by mail-lj1-x244.google.com with SMTP id r18so1693657ljc.2 for ; Sun, 22 Nov 2020 19:45:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=UU8EP5wBKEQP6da8/PNv0YuofmsT1cYlYb+MrY2uJNM=; b=puwQs1JgTJ5JRiyxJapv349RmvdEYM882XwnQgxN1WO1XZ/4rIpFptI3nk84L3L1Hf 5i95Ku69I51Zru18c78/2JpAew8jGPCHz3QlT/eR+0SLwEBh3tjxGlwlsy7GiXXI7rzo 78cdYl1p0ca4UiXeWwQbXaWYL6cmT38E9KXNOhWmNqYXoePp7Re01tF478Yki+Y9n5SH /ttTph36ZcidX5kH2moF64VDHZin68Cklzmq7ckt7FP6L3PTO39iW5XOBEvvQESErIT1 zqPoEnqjtZzhb4hbvk1E4ZFxy634LaqtNXgrq2iFjb+6aegWMriXDKar/YuMiyCN58eP 6+cw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=UU8EP5wBKEQP6da8/PNv0YuofmsT1cYlYb+MrY2uJNM=; b=NQlf3ugB9BBty0EauTCJW3QRMwoKKJ2YnAbY28BDI460KBZZJzwNnao125Lr8HTWkW 5F3r3k8uICSosv4rE0AOMrZhsVL59+5H9l34bGg+BV2tB+7MLs3FHt0TxwO3FMlrTTBX eVXtiKjLLsYolnVsnSZ3iH1uGkINGJ6z2FZS3l5yMiBcMDe3FnBzXhsCgz2WwzOtMRt1 FDIWeTTbRjSNtj/CEeg6tJsqzlH7zr6VTNeDnVfS6TUatp3zz/Di3Pgdzamw0xRqTx4t 4eCXR90btP9CA6QvBEusEAMRzL2VeU5MAfkP/uZq5TWvJS8wlPy9CRBBS7SvcT2U9kI3 aoVg== X-Gm-Message-State: AOAM530IgZTv140lwhlK8T89JVuNhNIxoLVb5tH+1+3kz4D9GTTPDIwk w4hSowp5XUgsosdJ5mBStY+O0SxFrmh9iA== X-Google-Smtp-Source: ABdhPJzETsKeKiB7E7nu5SY0i/2zCu1rLnuLi1ddHAgRWYuzzweN0a3lkVu3pPJN0YV6HGYMWrWaMg== X-Received: by 2002:a05:651c:203:: with SMTP id y3mr11499902ljn.66.1606103144192; Sun, 22 Nov 2020 19:45:44 -0800 (PST) Received: from container-ubuntu.lan ([240e:398:25da:d530::d2c]) by smtp.gmail.com with ESMTPSA id f10sm780378ljf.26.2020.11.22.19.45.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Nov 2020 19:45:43 -0800 (PST) From: DENG Qingfang To: netdev@vger.kernel.org, Felix Fietkau , John Crispin , Sean Wang , Mark Lee , "David S . Miller" , Jakub Kicinski , Matthias Brugger , Russell King , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Cc: Frank Wunderlich , David Woodhouse , Andrew Lunn , Rene van Dorst Subject: [PATCH net-next] net: ethernet: mediatek: support setting MTU Date: Mon, 23 Nov 2020 11:45:22 +0800 Message-Id: <20201123034522.1268-1-dqfext@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org MT762x HW, except for MT7628, supports frame length up to 2048 (maximum length on GDM), so allow setting MTU up to 2030. Signed-off-by: DENG Qingfang --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 36 ++++++++++++++++++++- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 11 +++++-- 2 files changed, 43 insertions(+), 4 deletions(-) Changes RFC -> v1: Exclude MT7628 diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 6d2d60675ffd..27cae3f43972 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -353,7 +353,7 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode, /* Setup gmac */ mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); mcr_new = mcr_cur; - mcr_new |= MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE | + mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE | MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK; /* Only update control register when needed! */ @@ -2499,6 +2499,39 @@ static void mtk_uninit(struct net_device *dev) mtk_rx_irq_disable(eth, ~0); } +static int mtk_change_mtu(struct net_device *dev, int new_mtu) +{ + int length = new_mtu + MTK_RX_ETH_HLEN; + struct mtk_mac *mac = netdev_priv(dev); + struct mtk_eth *eth = mac->hw; + u32 mcr_cur, mcr_new; + + if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { + if (length > 1536) + return -EINVAL; + } else { + mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); + mcr_new = mcr_cur & ~MAC_MCR_MAX_RX_LEN_MASK; + + if (length <= 1518) + mcr_new |= MAC_MCR_MAX_RX_LEN(MAC_MCR_MAX_RX_LEN_1518); + else if (length <= 1536) + mcr_new |= MAC_MCR_MAX_RX_LEN(MAC_MCR_MAX_RX_LEN_1536); + else if (length <= 1552) + mcr_new |= MAC_MCR_MAX_RX_LEN(MAC_MCR_MAX_RX_LEN_1552); + else + mcr_new |= MAC_MCR_MAX_RX_LEN(MAC_MCR_MAX_RX_LEN_2048); + + /* Only update control register when needed! */ + if (mcr_new != mcr_cur) + mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id)); + } + + dev->mtu = new_mtu; + + return 0; +} + static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { struct mtk_mac *mac = netdev_priv(dev); @@ -2795,6 +2828,7 @@ static const struct net_device_ops mtk_netdev_ops = { .ndo_set_mac_address = mtk_set_mac_address, .ndo_validate_addr = eth_validate_addr, .ndo_do_ioctl = mtk_do_ioctl, + .ndo_change_mtu = mtk_change_mtu, .ndo_tx_timeout = mtk_tx_timeout, .ndo_get_stats64 = mtk_get_stats64, .ndo_fix_features = mtk_fix_features, diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 454cfcd465fd..cfc11654ccd6 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -17,12 +17,12 @@ #include #define MTK_QDMA_PAGE_SIZE 2048 -#define MTK_MAX_RX_LENGTH 1536 +#define MTK_MAX_RX_LENGTH 2048 #define MTK_TX_DMA_BUF_LEN 0x3fff #define MTK_DMA_SIZE 256 #define MTK_NAPI_WEIGHT 64 #define MTK_MAC_COUNT 2 -#define MTK_RX_ETH_HLEN (VLAN_ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN) +#define MTK_RX_ETH_HLEN (ETH_HLEN + ETH_FCS_LEN) #define MTK_RX_HLEN (NET_SKB_PAD + MTK_RX_ETH_HLEN + NET_IP_ALIGN) #define MTK_DMA_DUMMY_DESC 0xffffffff #define MTK_DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | \ @@ -320,7 +320,12 @@ /* Mac control registers */ #define MTK_MAC_MCR(x) (0x10100 + (x * 0x100)) -#define MAC_MCR_MAX_RX_1536 BIT(24) +#define MAC_MCR_MAX_RX_LEN_MASK GENMASK(25, 24) +#define MAC_MCR_MAX_RX_LEN(_x) (MAC_MCR_MAX_RX_LEN_MASK & ((_x) << 24)) +#define MAC_MCR_MAX_RX_LEN_1518 0x0 +#define MAC_MCR_MAX_RX_LEN_1536 0x1 +#define MAC_MCR_MAX_RX_LEN_1552 0x2 +#define MAC_MCR_MAX_RX_LEN_2048 0x3 #define MAC_MCR_IPG_CFG (BIT(18) | BIT(16)) #define MAC_MCR_FORCE_MODE BIT(15) #define MAC_MCR_TX_EN BIT(14)