From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f53.google.com (mail-lf0-f53.google.com [209.85.215.53]) by dpdk.org (Postfix) with ESMTP id 573BAFAB9 for ; Wed, 18 Jan 2017 17:25:25 +0100 (CET) Received: by mail-lf0-f53.google.com with SMTP id n124so16141988lfd.2 for ; Wed, 18 Jan 2017 08:25:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:user-agent:in-reply-to :references:mime-version:content-transfer-encoding; bh=YiXG1Rz9eplxJEwIkiVz7EGL9et9A5ke03b8M4qyg24=; b=jfm3WAi7ystCbLFfvKOKiDdbl2AueQqkH1p8j+5cca16p/x0W3bsF2r4cOPmxKu9Nt nTutWUdG0S/tqyP6MAx0fdpL+UV4vvUGV5aAo6MGmVm1geio3X6eq1g1ePp8+tpW9ta0 dHSH/n/tbqsBL7IMgQKTtwjWwxoiJ+wQFTCHR/m7mTnHViXE2aq6bUx+9eIJ2Dddd22v d7zXsCAZhW0BT5GRW2J6Hjqsncnt6iaq/FfXfJUHlQRNExGN/gSaEwvJYSjlqM3IXHg5 6VR29MMhKlIme1hMgN+Kbhvd1jJ2AwN5lrILPV+IAfow9v4zh8p9pu0jRQ/gqpNlL8d7 sIFQ== 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:user-agent :in-reply-to:references:mime-version:content-transfer-encoding; bh=YiXG1Rz9eplxJEwIkiVz7EGL9et9A5ke03b8M4qyg24=; b=CvN2PWhkEJBIHNsd2k5/3bTdKq8Tu2fEWHdA/Fe9NbYRkblTp6fUihlpXiFgZuExDr XKUS+3+eCT4zann+aoVKnhSAHPjiagnIDq4lLsHbzbRKmQzzlaW0QezxmI57FAn89378 bUqrcfSIGanwto/QvheY1BbKfBpnhqxGHcEaOHD4XoCV+XNwhFKdx2Uba5HMi/G/egiZ AKIAqXzyeEi5DCS+/6IfzhmWHM+Pq5hv1tdKYArPv0IC4/gA1yRjK/vVhB6QBUnMwORn bNnT8o21XyuY4mX158yG8nqCkFeIwFOakfERnzlZJD8cuSnmzfheQt/VMAf85BtkAYBu W/kQ== X-Gm-Message-State: AIkVDXLTfLLK5Mk7NbzBTHhwBCbiqdumbyAhCfaIi/wIul7vsDCtMRt1f8ENFJqinJ3L25Cu X-Received: by 10.25.228.157 with SMTP id x29mr1414761lfi.125.1484756724798; Wed, 18 Jan 2017 08:25:24 -0800 (PST) Received: from xps13.localnet (184.203.134.77.rev.sfr.net. [77.134.203.184]) by smtp.gmail.com with ESMTPSA id e12sm475236ljb.38.2017.01.18.08.25.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 18 Jan 2017 08:25:23 -0800 (PST) From: Thomas Monjalon To: Jerin Jacob Cc: dev@dpdk.org, konstantin.ananyev@intel.com, bruce.richardson@intel.com, jianbo.liu@linaro.org, viktorin@rehivetech.com, santosh.shukla@caviumnetworks.com Date: Wed, 18 Jan 2017 17:25:22 +0100 Message-ID: <3075116.xAOueQvdyS@xps13> User-Agent: KMail/4.14.10 (Linux/4.5.4-1-ARCH; KDE/4.14.11; x86_64; ; ) In-Reply-To: <1484702502-25451-1-git-send-email-jerin.jacob@caviumnetworks.com> References: <1484637244-7548-1-git-send-email-jerin.jacob@caviumnetworks.com> <1484702502-25451-1-git-send-email-jerin.jacob@caviumnetworks.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH v5 00/29] introduce I/O device memory read/write operations X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Jan 2017 16:25:25 -0000 2017-01-18 06:51, Jerin Jacob: > Based on the discussion in the below-mentioned thread, > http://dev.dpdk.narkive.com/DpIRqDuy/dpdk-dev-patch-v2-i40e-fix-eth-i40e-dev-init-sequence-on-thunderx > > This patchset introduces 8-bit, 16-bit, 32bit, 64bit I/O device > memory read/write operations along with the relaxed versions. > > The weakly-ordered machine like ARM needs additional I/O barrier for > device memory read/write access over PCI bus. > By introducing the EAL abstraction for I/O device memory read/write access, > The drivers can access I/O device memory in architecture-agnostic manner. > > The relaxed version does not have additional I/O memory barrier, useful in > accessing the device registers of integrated controllers which > implicitly strongly ordered with respect to memory access. Applied, thanks Does it deserve an entry in the release notes?