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[2003:f1:373a:1900:428d:5cff:feb9:9db8]) by smtp.googlemail.com with ESMTPSA id e18sm26034448wrw.70.2019.12.24.16.57.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Dec 2019 16:57:53 -0800 (PST) From: Martin Blumenstingl To: linux-amlogic@lists.infradead.org, netdev@vger.kernel.org, davem@davemloft.net, khilman@baylibre.com Subject: [PATCH 1/3] net: stmmac: dwmac-meson8b: Fix the RGMII TX delay on Meson8b/8m2 SoCs Date: Wed, 25 Dec 2019 01:56:53 +0100 Message-Id: <20191225005655.1502037-2-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191225005655.1502037-1-martin.blumenstingl@googlemail.com> References: <20191225005655.1502037-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191224_165756_052304_C42EF274 X-CRM114-Status: GOOD ( 13.50 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:341 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (martin.blumenstingl[at]googlemail.com) -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linus.luessing@c0d3.blue, balbes-150@yandex.ru, linux-kernel@vger.kernel.org, Martin Blumenstingl , linux-arm-kernel@lists.infradead.org, ingrassia@epigenesys.com, jbrunet@baylibre.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org GXBB and newer SoCs use the fixed FCLK_DIV2 (1GHz) clock as input for the m250_sel clock. Meson8b and Meson8m2 use MPLL2 instead, whose rate can be adjusted at runtime. So far we have been running MPLL2 with ~250MHz (and the internal m250_div with value 1), which worked enough that we could transfer data with an TX delay of 4ns. Unfortunately there is high packet loss with an RGMII PHY when transferring data (receiving data works fine though). Odroid-C1's u-boot is running with a TX delay of only 2ns as well as the internal m250_div set to 2 - no lost (TX) packets can be observed with that setting in u-boot. Manual testing has shown that the TX packet loss goes away when using the following settings in Linux: - MPLL2 clock set to ~500MHz - m250_div set to 2 - TX delay set to 2ns Update the m250_div divider settings to only accept dividers greater or equal 2. This will allow the Meson8 and Meson8m2 .dts to be updated to use a TX delay of 2ns (instead of 4ns) to fix the TX packet loss. iperf3 results before the change: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 182 MBytes 153 Mbits/sec 514 sender [ 5] 0.00-10.00 sec 182 MBytes 152 Mbits/sec receiver iperf3 results after the change (including an updated TX delay of 2ns): [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-10.00 sec 927 MBytes 778 Mbits/sec 0 sender [ 5] 0.00-10.01 sec 927 MBytes 777 Mbits/sec receiver Fixes: 4f6a71b84e1afd ("net: stmmac: dwmac-meson8b: fix internal RGMII clock configuration") Signed-off-by: Martin Blumenstingl --- .../net/ethernet/stmicro/stmmac/dwmac-meson8b.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c index bd6c01004913..0e2fa14f1423 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c @@ -112,6 +112,14 @@ static int meson8b_init_rgmii_tx_clk(struct meson8b_dwmac *dwmac) struct device *dev = dwmac->dev; const char *parent_name, *mux_parent_names[MUX_CLK_NUM_PARENTS]; struct meson8b_dwmac_clk_configs *clk_configs; + static const struct clk_div_table div_table[] = { + { .div = 2, .val = 2, }, + { .div = 3, .val = 3, }, + { .div = 4, .val = 4, }, + { .div = 5, .val = 5, }, + { .div = 6, .val = 6, }, + { .div = 7, .val = 7, }, + }; clk_configs = devm_kzalloc(dev, sizeof(*clk_configs), GFP_KERNEL); if (!clk_configs) @@ -146,9 +154,9 @@ static int meson8b_init_rgmii_tx_clk(struct meson8b_dwmac *dwmac) clk_configs->m250_div.reg = dwmac->regs + PRG_ETH0; clk_configs->m250_div.shift = PRG_ETH0_CLK_M250_DIV_SHIFT; clk_configs->m250_div.width = PRG_ETH0_CLK_M250_DIV_WIDTH; - clk_configs->m250_div.flags = CLK_DIVIDER_ONE_BASED | - CLK_DIVIDER_ALLOW_ZERO | - CLK_DIVIDER_ROUND_CLOSEST; + clk_configs->m250_div.table = div_table; + clk_configs->m250_div.flags = CLK_DIVIDER_ALLOW_ZERO | + CLK_DIVIDER_ROUND_CLOSEST; clk = meson8b_dwmac_register_clk(dwmac, "m250_div", &parent_name, 1, &clk_divider_ops, &clk_configs->m250_div.hw); 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[2003:f1:373a:1900:428d:5cff:feb9:9db8]) by smtp.googlemail.com with ESMTPSA id e18sm26034448wrw.70.2019.12.24.16.57.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Dec 2019 16:57:54 -0800 (PST) From: Martin Blumenstingl To: linux-amlogic@lists.infradead.org, netdev@vger.kernel.org, davem@davemloft.net, khilman@baylibre.com Subject: [PATCH 2/3] ARM: dts: meson8b: odroidc1: use the same RGMII TX delay as u-boot Date: Wed, 25 Dec 2019 01:56:54 +0100 Message-Id: <20191225005655.1502037-3-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191225005655.1502037-1-martin.blumenstingl@googlemail.com> References: <20191225005655.1502037-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191224_165756_629118_93DA86C0 X-CRM114-Status: GOOD ( 13.39 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:341 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (martin.blumenstingl[at]googlemail.com) -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linus.luessing@c0d3.blue, balbes-150@yandex.ru, linux-kernel@vger.kernel.org, Martin Blumenstingl , linux-arm-kernel@lists.infradead.org, ingrassia@epigenesys.com, jbrunet@baylibre.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Due to a bug in the MPLL2 clock setup (which is used as input for the RGMII TX clock) a TX delay of 2ns did not work previously. With a TX delay of 4ns Ethernet worked enough to get an IP via DHCP but there was still high packet loss when transmitting data. Update the TX delay to 2ns - which is the same value that u-boot and the vendor kernel use - to fix the packet loss when transmitting data. Fixes: 9c15795a4f96cb ("ARM: dts: meson8b-odroidc1: ethernet support") Signed-off-by: Martin Blumenstingl --- arch/arm/boot/dts/meson8b-odroidc1.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts index a2a47804fc4a..e2ba2d66d8d9 100644 --- a/arch/arm/boot/dts/meson8b-odroidc1.dts +++ b/arch/arm/boot/dts/meson8b-odroidc1.dts @@ -204,7 +204,7 @@ ðmac { phy-mode = "rgmii"; phy-handle = <ð_phy>; - amlogic,tx-delay-ns = <4>; + amlogic,tx-delay-ns = <2>; nvmem-cells = <ðernet_mac_address>; nvmem-cell-names = "mac-address"; From patchwork Wed Dec 25 00:56:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Blumenstingl X-Patchwork-Id: 11309901 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7B5D113A4 for ; Wed, 25 Dec 2019 00:58:59 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 514442063A for ; Wed, 25 Dec 2019 00:58:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="M/ubFXOC"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=googlemail.com header.i=@googlemail.com header.b="GlptQvw+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 514442063A Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=googlemail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tbDSClMk13epZwJCyalqOz2/cIg+QyLchKKi6Bo5yYc=; b=M/ubFXOC2kddEL fyhwvEuIE7/LyQ2dWq3AwBjjj4E24uM15jqinxTd4M8qOkYMcaxa5InLUf3ii1LZcFIafy+r9E+j2 fHo441h0PsJH6n6sD8o/qImKAy674aFk9m20+2/MiP1YfpN+QHl2xww3YNI4qc9hjh1pHFNkPTKyh sv7raNuSp+PmzuuL0pL2RLhwCclnkyKDZ/p0p6Tfzqv9Oz9SKuGDCOKj3x4WndPSKZuWRO1stLP02 m/nZfFNxr3Sm1409wl3Nd8RIj6/8aux2fUPKzm2W2rtZs33uN8LMV2Fe+UpYBudJfa/z81hkNXVez QmY/98rz6LBf7WcDUb7A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ijv0r-0005t9-Ba; Wed, 25 Dec 2019 00:58:57 +0000 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ijuzt-0004wR-UN; Wed, 25 Dec 2019 00:57:59 +0000 Received: by mail-wr1-x442.google.com with SMTP id c14so20894015wrn.7; Tue, 24 Dec 2019 16:57:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=PFmQ90ZYw4YHFMWAxeUA4KZ+OR6FSTaAbjo/3KRmum4=; b=GlptQvw+dENRbqNV/ZmYyeMc5Iulp2sTSNKMBKg5vCMLRijEI9Hx3VEPXiFos2QoaM qGGlUu6cka/RPmy43aWC/KO2BUyr6IVmb71uP+FS/BlJENgpEVw2bRW8ERlUHsPOhPq6 1FL/jRTLeIDjfgkSdwv+b3IwbhE7XNOo7ENrwB+ytOP8t2aByTrcLeDhjS61iXJoPo/2 ltA1Pfr8zQsYRObjB5Gq2glDrrGmaJNg4dHHyJtZ/dG7wDQVsCgcja2RlaCwN+9UNEER pUpOoSHw3xsn8oebebqtZljVxeKLTlHXZ7dyOa6ixLsSuoBrq3aajnuQR1iHKWAAqRJ6 6BdQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=PFmQ90ZYw4YHFMWAxeUA4KZ+OR6FSTaAbjo/3KRmum4=; b=PwDI6lNpyv7gl0qEGYpxM+XY1HXODz9JP+VX3E/nX0xUO46eRnbvZprICilDhRhL// qdLQrpPtwznklTAN5I2RQSYdCA09uobq5QVaiZ59YRd/yy9See0EHeaoh6UHpmWf0rgm U46LbCx3URkD5HoKnx+r/ySYs0UC/i/h0uJVhFN3/icTI0VilVj6BV8wgLNNAuYf3meM 47mLz1NfrG0WS0T8UMF71g+eyVtpDvPMyrF/3FZRe/TQAUFyvw6l00BcdPMcDubsPOXk wEBEQZiVwmoFbNsCKuqe3JV2OGbRbkTZPkG36Cfzw0YwctY/xxTi52QDAw10xz8yI40t +Q9w== X-Gm-Message-State: APjAAAV+yhK7xTL0WGbc0mOvYMFOrebYzo/1CRnHBG5B8AdwXrXjOleZ sOQURinQDI/2OnHdkMr/DSuyDGfN X-Google-Smtp-Source: APXvYqzMRfyD3lyEw+Zb4gNepoyAdwAUCWFEyKKCzMwOT61ncy02kog+p+b5jrt9BJEzS0NQro+IIQ== X-Received: by 2002:a5d:6390:: with SMTP id p16mr38153955wru.170.1577235476171; Tue, 24 Dec 2019 16:57:56 -0800 (PST) Received: from localhost.localdomain (p200300F1373A1900428D5CFFFEB99DB8.dip0.t-ipconnect.de. [2003:f1:373a:1900:428d:5cff:feb9:9db8]) by smtp.googlemail.com with ESMTPSA id e18sm26034448wrw.70.2019.12.24.16.57.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Dec 2019 16:57:55 -0800 (PST) From: Martin Blumenstingl To: linux-amlogic@lists.infradead.org, netdev@vger.kernel.org, davem@davemloft.net, khilman@baylibre.com Subject: [PATCH 3/3] ARM: dts: meson8m2: mxiii-plus: use the same RGMII TX delay as u-boot Date: Wed, 25 Dec 2019 01:56:55 +0100 Message-Id: <20191225005655.1502037-4-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191225005655.1502037-1-martin.blumenstingl@googlemail.com> References: <20191225005655.1502037-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191224_165757_976817_C5423421 X-CRM114-Status: GOOD ( 14.21 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:442 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (martin.blumenstingl[at]googlemail.com) -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linus.luessing@c0d3.blue, balbes-150@yandex.ru, linux-kernel@vger.kernel.org, Martin Blumenstingl , linux-arm-kernel@lists.infradead.org, ingrassia@epigenesys.com, jbrunet@baylibre.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Due to a bug in the MPLL2 clock setup (which is used as input for the RGMII TX clock) a TX delay of 2ns did not work previously. With a TX delay of 4ns Ethernet worked enough to get an IP via DHCP but there was still high packet loss when transmitting data. Update the TX delay to 2ns - which is the same value that u-boot and the vendor kernel use - to fix the packet loss when transmitting data. Fixes: 35ee52bea66c74 ("ARM: dts: meson8m2: add support for the Tronsmart MXIII Plus") Signed-off-by: Martin Blumenstingl --- arch/arm/boot/dts/meson8m2-mxiii-plus.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/meson8m2-mxiii-plus.dts b/arch/arm/boot/dts/meson8m2-mxiii-plus.dts index d54477b1001c..fd94b5cbd845 100644 --- a/arch/arm/boot/dts/meson8m2-mxiii-plus.dts +++ b/arch/arm/boot/dts/meson8m2-mxiii-plus.dts @@ -71,7 +71,7 @@ ðmac { phy-handle = <ð_phy0>; phy-mode = "rgmii"; - amlogic,tx-delay-ns = <4>; + amlogic,tx-delay-ns = <2>; mdio { compatible = "snps,dwmac-mdio";