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=-10.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 A81E0C2D0DC for ; Thu, 2 Jan 2020 21:03:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7209421655 for ; Thu, 2 Jan 2020 21:03:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="V7cncm3b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725861AbgABVDx (ORCPT ); Thu, 2 Jan 2020 16:03:53 -0500 Received: from mail-qt1-f196.google.com ([209.85.160.196]:37771 "EHLO mail-qt1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725851AbgABVDw (ORCPT ); Thu, 2 Jan 2020 16:03:52 -0500 Received: by mail-qt1-f196.google.com with SMTP id w47so35553980qtk.4 for ; Thu, 02 Jan 2020 13:03:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=u/1QWs2jPVwxNcjpbkDfisWtGO+dg+9ohdYz7wriUQg=; b=V7cncm3blLDxWy8NZTHL6buNa8Y4NzotMofdHicMcndR64BhDiE8zzfb474TpkISje mk9WX4kbXnmBRZ/KtwE80IXw/SL7BtRQsVuRCNawEtSdDc5vYf73nNmWnIApTNFxgqs6 Ec8+FHWTiuEldubJi6FhCN7abg8qxLGXusXxOpqvUVipmoNPdf+ead2oohOvVFlnMljo 6KjMQaXVT5rxl0pyDqhtyEqkJqtWttAtCmRJ9ef7dEP/2Ex7RynZb7qPkX3/o7+V+ZPQ sMyvqTCpieAPwQYhfQsj7UXT5sTP/ZCeLzccOOacYloNzgD7hpdnav532lRWa+Uy3w1e bYpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=u/1QWs2jPVwxNcjpbkDfisWtGO+dg+9ohdYz7wriUQg=; b=d7FbTXx4Uc4D1wCzQ6I+V5mzzTnTEKWz5fbaI5gVLTBQgClNb26t87WR89cJeJdP16 wqVFm/s1IYeou7z8SjPSr8XjHM3FJGh3XnWTxVXzezuDvsUb6JmP1x7KZl8P2zbltnEv xONpBsUFBHW90bIwCoLOadetUGWXr/keDe/9MDb22PHbCXBK2Rx0m0Q/bFUezrFyRCye S8P7/jbZJuREJG0CUCEIG8QKd1pjKRR9XTKsxZFLooM8zZxMTJzfkaFQ0rqa6SIY0w04 8bGuX9xRabq5WCwgIm4XlRcDX4iNCD0LDvOFKR76V2dAkSJlt/d6kWdpVqlE5a5z+zl7 NDQw== X-Gm-Message-State: APjAAAWn+z4xkRgXY8oGLzew60KFjHthviwbM7XWZUxIaKSBZilUCdWG /Dzr7STpsNUN3ycV3szptl9EgQ== X-Google-Smtp-Source: APXvYqwWqT5eZ7AlBRxNxepchCjTvseU5D/TZ7TNk6KwRFCca7889MZHa7T4dk+whnabtltR2zc78w== X-Received: by 2002:ac8:1198:: with SMTP id d24mr61150163qtj.105.1577999032232; Thu, 02 Jan 2020 13:03:52 -0800 (PST) Received: from ziepe.ca (hlfxns017vw-142-68-57-212.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.68.57.212]) by smtp.gmail.com with ESMTPSA id z4sm15357996qkz.62.2020.01.02.13.03.51 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 02 Jan 2020 13:03:51 -0800 (PST) Received: from jgg by mlx.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1in7dH-00008j-9E; Thu, 02 Jan 2020 17:03:51 -0400 Date: Thu, 2 Jan 2020 17:03:51 -0400 From: Jason Gunthorpe To: Weihang Li Cc: dledford@redhat.com, linux-rdma@vger.kernel.org, linuxarm@huawei.com Subject: Re: [PATCH for-next] RDMA/hns: Add support for extended atomic Message-ID: <20200102210351.GA398@ziepe.ca> References: <1573781966-45800-1-git-send-email-liweihang@hisilicon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1573781966-45800-1-git-send-email-liweihang@hisilicon.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Fri, Nov 15, 2019 at 09:39:26AM +0800, Weihang Li wrote: > From: Jiaran Zhang > > Support extended atomic operations including cmp & swap and fetch & add > of 8 bytes, 16 bytes, 32 bytes, 64 bytes on hip08. > > Signed-off-by: Jiaran Zhang > Signed-off-by: Weihang Li > --- > drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 100 ++++++++++++++++++++++++----- > drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 8 +++ > 2 files changed, 93 insertions(+), 15 deletions(-) How is this related to the userspace patch: https://github.com/linux-rdma/rdma-core/pull/640 ? Under what conditions would the kernel part be needed? Confused because we have no kernel users of extended atomic. Jason