From mboxrd@z Thu Jan 1 00:00:00 1970 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=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 C5A72CA9EC7 for ; Sat, 2 Nov 2019 19:35:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97FE720862 for ; Sat, 2 Nov 2019 19:35:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="SyFCUiJ6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727179AbfKBTey (ORCPT ); Sat, 2 Nov 2019 15:34:54 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:54778 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726771AbfKBTex (ORCPT ); Sat, 2 Nov 2019 15:34:53 -0400 Received: by mail-wm1-f68.google.com with SMTP id c12so8129286wml.4 for ; Sat, 02 Nov 2019 12:34:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:subject:to:cc:references:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=XrAM25vpWZD5MTWL7vyE3YXP4ScFEtr0870Eoi4wxso=; b=SyFCUiJ63BrzjubzWkv9d+F3cDrNjv9Oxe5yTcZG4TgXdHM68u0QB3NZpH5qCkChiC Mpn4Sdstcgkg7xgmh8cXd2UgqY6XSJ3IQ35/REpExZg8mY6s/vzf8jiuXD4OiVd9MlqQ 1JpYoxQMiaZmEthuHS8tmLDMWI1z4QWRhHIMLHg3liOjkCI5OtcQNN35OVrY9zew6onA 1Cve0bkiyu9PIlXC3xrZIesUaRuSg5jB03fOMW8lHGkHWX7xEAonOGKPSQ4OT45xggW5 udU4rnK0fnv9fjLzVFtPKtUwkR2QAZf8xU/h2Ca5MKz6SLJ6E4tHr5U62dAhKGOMlhP2 GLXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:cc:references:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=XrAM25vpWZD5MTWL7vyE3YXP4ScFEtr0870Eoi4wxso=; b=DfWuiZFQKd+hr3jbeYpfp4cV2XMIxqHqS7tNXf+sY5+/ACQ0HzgAGMK333zMcInant 6wJWrRNfZtmFVP7vBT/wbbBh4QHkfOhJV07QlPr9GNuLPkq79PpFC9IH+tqQMkJ+R+XB GqxcoikHlwm6laC6f3srlD6jVbCeeTCN3Lw9YKYMEBCamfGI1xWOWHn6fXZb89LUQFpl W0Xrs/uSWhu4i7c6ot4KmPTQVRrdhZyo9AgkrqVQvE42nqiTLL5kfk/Z00FE5OSLOmMe J+Jvb41kwnf3wZd1Q2qv3UC/XuIvPsRDFuLIbPHVExSc1zItMCYQw6z9uMnndkqVj8bJ W/1w== X-Gm-Message-State: APjAAAWOwwfiijhNNwvMIFOLCwFaOZPiRI+kGyxrQLy9Mv6OhnZls/jQ 9vF6S2t41SPQ4kjRwDs5Ec8= X-Google-Smtp-Source: APXvYqxKUFgr6ValYFAzYN6/aTyEwKVGGONbq0glLWx8r8nDNSPSdVCQz4qVXCtd1f8wW5EzqpD6oA== X-Received: by 2002:a7b:cd04:: with SMTP id f4mr11287498wmj.91.1572723291468; Sat, 02 Nov 2019 12:34:51 -0700 (PDT) Received: from [10.230.29.119] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id t185sm17703784wmf.45.2019.11.02.12.34.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 02 Nov 2019 12:34:49 -0700 (PDT) From: Florian Fainelli Subject: Re: [PATCH RFC V2 3/6] net: bcmgenet: use optional max DMA burst size property To: Stefan Wahren , Matthias Brugger , Matthias Brugger , "David S . Miller" , Florian Fainelli Cc: Eric Anholt , Nicolas Saenz Julienne , Doug Berger , netdev@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org References: <1572702093-18261-1-git-send-email-wahrenst@gmx.net> <1572702093-18261-4-git-send-email-wahrenst@gmx.net> Autocrypt: addr=f.fainelli@gmail.com; keydata= mQGiBEjPuBIRBACW9MxSJU9fvEOCTnRNqG/13rAGsj+vJqontvoDSNxRgmafP8d3nesnqPyR xGlkaOSDuu09rxuW+69Y2f1TzjFuGpBk4ysWOR85O2Nx8AJ6fYGCoeTbovrNlGT1M9obSFGQ X3IzRnWoqlfudjTO5TKoqkbOgpYqIo5n1QbEjCCwCwCg3DOH/4ug2AUUlcIT9/l3pGvoRJ0E AICDzi3l7pmC5IWn2n1mvP5247urtHFs/uusE827DDj3K8Upn2vYiOFMBhGsxAk6YKV6IP0d ZdWX6fqkJJlu9cSDvWtO1hXeHIfQIE/xcqvlRH783KrihLcsmnBqOiS6rJDO2x1eAgC8meAX SAgsrBhcgGl2Rl5gh/jkeA5ykwbxA/9u1eEuL70Qzt5APJmqVXR+kWvrqdBVPoUNy/tQ8mYc nzJJ63ng3tHhnwHXZOu8hL4nqwlYHRa9eeglXYhBqja4ZvIvCEqSmEukfivk+DlIgVoOAJbh qIWgvr3SIEuR6ayY3f5j0f2ejUMYlYYnKdiHXFlF9uXm1ELrb0YX4GMHz7QnRmxvcmlhbiBG YWluZWxsaSA8Zi5mYWluZWxsaUBnbWFpbC5jb20+iGYEExECACYCGyMGCwkIBwMCBBUCCAME FgIDAQIeAQIXgAUCVF/S8QUJHlwd3wAKCRBhV5kVtWN2DvCVAJ4u4/bPF4P3jxb4qEY8I2gS 6hG0gACffNWlqJ2T4wSSn+3o7CCZNd7SLSC5BA0ESM+4EhAQAL/o09boR9D3Vk1Tt7+gpYr3 WQ6hgYVON905q2ndEoA2J0dQxJNRw3snabHDDzQBAcqOvdi7YidfBVdKi0wxHhSuRBfuOppu pdXkb7zxuPQuSveCLqqZWRQ+Cc2QgF7SBqgznbe6Ngout5qXY5Dcagk9LqFNGhJQzUGHAsIs hap1f0B1PoUyUNeEInV98D8Xd/edM3mhO9nRpUXRK9Bvt4iEZUXGuVtZLT52nK6Wv2EZ1TiT OiqZlf1P+vxYLBx9eKmabPdm3yjalhY8yr1S1vL0gSA/C6W1o/TowdieF1rWN/MYHlkpyj9c Rpc281gAO0AP3V1G00YzBEdYyi0gaJbCEQnq8Vz1vDXFxHzyhgGz7umBsVKmYwZgA8DrrB0M oaP35wuGR3RJcaG30AnJpEDkBYHznI2apxdcuTPOHZyEilIRrBGzDwGtAhldzlBoBwE3Z3MY 31TOpACu1ZpNOMysZ6xiE35pWkwc0KYm4hJA5GFfmWSN6DniimW3pmdDIiw4Ifcx8b3mFrRO BbDIW13E51j9RjbO/nAaK9ndZ5LRO1B/8Fwat7bLzmsCiEXOJY7NNpIEpkoNoEUfCcZwmLrU +eOTPzaF6drw6ayewEi5yzPg3TAT6FV3oBsNg3xlwU0gPK3v6gYPX5w9+ovPZ1/qqNfOrbsE FRuiSVsZQ5s3AAMFD/9XjlnnVDh9GX/r/6hjmr4U9tEsM+VQXaVXqZuHKaSmojOLUCP/YVQo 7IiYaNssCS4FCPe4yrL4FJJfJAsbeyDykMN7wAnBcOkbZ9BPJPNCbqU6dowLOiy8AuTYQ48m vIyQ4Ijnb6GTrtxIUDQeOBNuQC/gyyx3nbL/lVlHbxr4tb6YkhkO6shjXhQh7nQb33FjGO4P WU11Nr9i/qoV8QCo12MQEo244RRA6VMud06y/E449rWZFSTwGqb0FS0seTcYNvxt8PB2izX+ HZA8SL54j479ubxhfuoTu5nXdtFYFj5Lj5x34LKPx7MpgAmj0H7SDhpFWF2FzcC1bjiW9mjW HaKaX23Awt97AqQZXegbfkJwX2Y53ufq8Np3e1542lh3/mpiGSilCsaTahEGrHK+lIusl6mz Joil+u3k01ofvJMK0ZdzGUZ/aPMZ16LofjFA+MNxWrZFrkYmiGdv+LG45zSlZyIvzSiG2lKy kuVag+IijCIom78P9jRtB1q1Q5lwZp2TLAJlz92DmFwBg1hyFzwDADjZ2nrDxKUiybXIgZp9 aU2d++ptEGCVJOfEW4qpWCCLPbOT7XBr+g/4H3qWbs3j/cDDq7LuVYIe+wchy/iXEJaQVeTC y5arMQorqTFWlEOgRA8OP47L9knl9i4xuR0euV6DChDrguup2aJVU4hPBBgRAgAPAhsMBQJU X9LxBQkeXB3fAAoJEGFXmRW1Y3YOj4UAn3nrFLPZekMeqX5aD/aq/dsbXSfyAKC45Go0YyxV HGuUuzv+GKZ6nsysJ7kCDQRXG8fwARAA6q/pqBi5PjHcOAUgk2/2LR5LjjesK50bCaD4JuNc YDhFR7Vs108diBtsho3w8WRd9viOqDrhLJTroVckkk74OY8r+3t1E0Dd4wHWHQZsAeUvOwDM PQMqTUBFuMi6ydzTZpFA2wBR9x6ofl8Ax+zaGBcFrRlQnhsuXLnM1uuvS39+pmzIjasZBP2H UPk5ifigXcpelKmj6iskP3c8QN6x6GjUSmYx+xUfs/GNVSU1XOZn61wgPDbgINJd/THGdqiO iJxCLuTMqlSsmh1+E1dSdfYkCb93R/0ZHvMKWlAx7MnaFgBfsG8FqNtZu3PCLfizyVYYjXbV WO1A23riZKqwrSJAATo5iTS65BuYxrFsFNPrf7TitM8E76BEBZk0OZBvZxMuOs6Z1qI8YKVK UrHVGFq3NbuPWCdRul9SX3VfOunr9Gv0GABnJ0ET+K7nspax0xqq7zgnM71QEaiaH17IFYGS sG34V7Wo3vyQzsk7qLf9Ajno0DhJ+VX43g8+AjxOMNVrGCt9RNXSBVpyv2AMTlWCdJ5KI6V4 KEzWM4HJm7QlNKE6RPoBxJVbSQLPd9St3h7mxLcne4l7NK9eNgNnneT7QZL8fL//s9K8Ns1W t60uQNYvbhKDG7+/yLcmJgjF74XkGvxCmTA1rW2bsUriM533nG9gAOUFQjURkwI8jvMAEQEA AYkCaAQYEQIACQUCVxvH8AIbAgIpCRBhV5kVtWN2DsFdIAQZAQIABgUCVxvH8AAKCRCH0Jac RAcHBIkHD/9nmfog7X2ZXMzL9ktT++7x+W/QBrSTCTmq8PK+69+INN1ZDOrY8uz6htfTLV9+ e2W6G8/7zIvODuHk7r+yQ585XbplgP0V5Xc8iBHdBgXbqnY5zBrcH+Q/oQ2STalEvaGHqNoD UGyLQ/fiKoLZTPMur57Fy1c9rTuKiSdMgnT0FPfWVDfpR2Ds0gpqWePlRuRGOoCln5GnREA/ 2MW2rWf+CO9kbIR+66j8b4RUJqIK3dWn9xbENh/aqxfonGTCZQ2zC4sLd25DQA4w1itPo+f5 V/SQxuhnlQkTOCdJ7b/mby/pNRz1lsLkjnXueLILj7gNjwTabZXYtL16z24qkDTI1x3g98R/ xunb3/fQwR8FY5/zRvXJq5us/nLvIvOmVwZFkwXc+AF+LSIajqQz9XbXeIP/BDjlBNXRZNdo dVuSU51ENcMcilPr2EUnqEAqeczsCGpnvRCLfVQeSZr2L9N4svNhhfPOEscYhhpHTh0VPyxI pPBNKq+byuYPMyk3nj814NKhImK0O4gTyCK9b+gZAVvQcYAXvSouCnTZeJRrNHJFTgTgu6E0 caxTGgc5zzQHeX67eMzrGomG3ZnIxmd1sAbgvJUDaD2GrYlulfwGWwWyTNbWRvMighVdPkSF 6XFgQaosWxkV0OELLy2N485YrTr2Uq64VKyxpncLh50e2RnyAJ9qfUATKC9NgZjRvBztfqy4 a9BQwACgnzGuH1BVeT2J0Ra+ZYgkx7DaPR0= Message-ID: Date: Sat, 2 Nov 2019 12:34:45 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 In-Reply-To: <1572702093-18261-4-git-send-email-wahrenst@gmx.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 11/2/2019 6:41 AM, Stefan Wahren wrote: > From: Matthias Brugger > > Depending on the HW, the maximal usable DMA burst size can vary. > If not set accordingly a timeout in the transmit queue happens and no > package can be sent. Read to optional max-burst-sz property, if not > present, fallback to the standard value. > > Signed-off-by: Matthias Brugger Missing your Signed-off-by here since you are carrying this patch from Matthias. > --- [snip] > + if (dn) { > + of_property_read_u32(dn, "dma-burst-sz", > + &priv->dma_max_burst_length); > + } else { > + priv->dma_max_burst_length = DMA_MAX_BURST_LENGTH; > + } I would maintain the previous position provided on Matthias' patch series, which is the integration of the GENETv5 hardware block in 2711 is done in a way that is different enough (due to the SCB/AXI bridge) that a separate compatibility string would be in order. Once you that defined that "brcm,bcm2711-genet-v5" compatibility string defined, you can derive the DMA burst size off of it. If adding a compatibility string is not practical because of the downstream DTBs, then can we at least fix this patch in two ways: - define the property in the binding document - spell out the property in full names: max-dma-burst-size so as to reflect what it does Thanks! -- Florian