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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4027AC433F5 for ; Fri, 24 Dec 2021 07:54:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237619AbhLXHy3 (ORCPT ); Fri, 24 Dec 2021 02:54:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234111AbhLXHy3 (ORCPT ); Fri, 24 Dec 2021 02:54:29 -0500 Received: from out2.migadu.com (out2.migadu.com [IPv6:2001:41d0:2:aacc::]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D6FFC061401 for ; Thu, 23 Dec 2021 23:54:29 -0800 (PST) Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1640332466; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iXLlxxN1iciEI8r1WerIXow5D/3YqXprzOtxY0P07rc=; b=wq+XrJ0bL92/mJjRE0G9NK03OqEUXzwVXdXMv7Pzcn9Frd9VlCQ2yZ2SWqpa6Ob7019Fi7 hIoRZYsXiHKdZuCuVOXInV9Bx580NX3qlOYluHseWf0VH6O7w84ADuZJDt0oF1arUPtkc3 FHE2Y2D+LirGCHKASMXGK6dqJ8qw0/g= Date: Fri, 24 Dec 2021 15:54:18 +0800 MIME-Version: 1.0 Subject: Re: [PATCH rdma-next 10/11] RDMA/erdma: Add the ABI definitions To: Leon Romanovsky , Yanjun Zhu Cc: Cheng Xu , jgg@ziepe.ca, dledford@redhat.com, linux-rdma@vger.kernel.org, KaiShen@linux.alibaba.com, tonylu@linux.alibaba.com References: <20211221024858.25938-1-chengyou@linux.alibaba.com> <20211221024858.25938-11-chengyou@linux.alibaba.com> <6cb90490-d21c-e76e-19b9-2a7fe0669e04@linux.dev> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Yanjun Zhu In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org 在 2021/12/24 14:04, Leon Romanovsky 写道: > On Fri, Dec 24, 2021 at 06:55:41AM +0800, Yanjun Zhu wrote: >> 在 2021/12/24 2:45, Leon Romanovsky 写道: >>> On Thu, Dec 23, 2021 at 11:46:03PM +0800, Yanjun Zhu wrote: >>>> 在 2021/12/21 10:48, Cheng Xu 写道: >>>>> Signed-off-by: Cheng Xu >>>>> --- >>>>> include/uapi/rdma/erdma-abi.h | 49 +++++++++++++++++++++++++++++++++++ >>>>> 1 file changed, 49 insertions(+) >>>>> create mode 100644 include/uapi/rdma/erdma-abi.h >>>>> >>>>> diff --git a/include/uapi/rdma/erdma-abi.h b/include/uapi/rdma/erdma-abi.h >>>>> new file mode 100644 >>>>> index 000000000000..6bcba10c1e41 >>>>> --- /dev/null >>>>> +++ b/include/uapi/rdma/erdma-abi.h >>>>> @@ -0,0 +1,49 @@ >>>>> +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */ >>>>> +/* >>>>> + * Copyright (c) 2020-2021, Alibaba Group. >>>>> + */ >>>>> + >>>>> +#ifndef __ERDMA_USER_H__ >>>>> +#define __ERDMA_USER_H__ >>>>> + >>>>> +#include >>>>> + >>>>> +#define ERDMA_ABI_VERSION 1 >>>> >>>> ERDMA_ABI_VERSION should be 2？ >>> >>> Why? >>> >>> This field is for rdma-core and we don't have erdma provider in that >>> library yet. It always starts from 1 for new drivers. >> Please check this link: >> http://mail.spinics.net/lists/linux-rdma/msg63012.html > > OK, I still don't understand why. Perhaps 32 bit machines require ABI version 2 which guarentees the user and kernel use the same ABI. Zhu Yanjun > > RXE case is different, because rdma-core already had broken RXE > implementation, so this is why the version was incremented. > >> >> Jason mentioned in this link: >> >> " >> /* >> * For 64 bit machines ABI version 1 and 2 are the same. Otherwise 32 >> * bit machines require ABI version 2 which guarentees the user and >> * kernel use the same ABI. >> */ >> " >> >> Zhu Yanjun >>> >>> Thanks >>