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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A68D0C433FE for ; Tue, 16 Nov 2021 00:34:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9229561265 for ; Tue, 16 Nov 2021 00:34:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244936AbhKPAgw (ORCPT ); Mon, 15 Nov 2021 19:36:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:45222 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344530AbhKOTY4 (ORCPT ); Mon, 15 Nov 2021 14:24:56 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E34A633D6; Mon, 15 Nov 2021 18:59:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1637002756; bh=zMEjE3Knkr0P5Wz39Ef0JuhVw/WI+mBe+VHqqnnyn7g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JP8dr5iliU8RS7saV2BOcYrAQ/HnFUJdvE0TtOSK1dFgYvGQJ25A4OLxDzNNDnggi ixHMjf7SnCU9YTJ7W61G+VCTQivDasTdU7zq3sADtam+L/17oKlHh7nlE1ZgWOwj55 fVkYt2cz/eVqu0XkhuB0vI6yD6XFJyDY8WdXwtEk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yixing Liu , Wenpeng Liang , Jason Gunthorpe , Sasha Levin Subject: [PATCH 5.15 685/917] RDMA/hns: Modify the value of MAX_LP_MSG_LEN to meet hardware compatibility Date: Mon, 15 Nov 2021 18:03:00 +0100 Message-Id: <20211115165452.126721478@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165428.722074685@linuxfoundation.org> References: <20211115165428.722074685@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yixing Liu [ Upstream commit 0e60778efb072d47efc7100c4009b5bd97273b0b ] The upper limit of MAX_LP_MSG_LEN on HIP08 is 64K, and the upper limit on HIP09 is 16K. Regardless of whether it is HIP08 or HIP09, only 16K will be used. In order to ensure compatibility, it is unified to 16K. Setting MAX_LP_MSG_LEN to 16K will not cause performance loss on HIP08. Fixes: fbed9d2be292 ("RDMA/hns: Fix configuration of ack_req_freq in QPC") Link: https://lore.kernel.org/r/20211029100537.27299-1-liangwenpeng@huawei.com Signed-off-by: Yixing Liu Signed-off-by: Wenpeng Liang Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index 8e5f0862896ee..a9c6ffef9640f 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -4399,8 +4399,8 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp, mtu = ib_mtu_enum_to_int(ib_mtu); if (WARN_ON(mtu <= 0)) return -EINVAL; -#define MAX_LP_MSG_LEN 65536 - /* MTU * (2 ^ LP_PKTN_INI) shouldn't be bigger than 64KB */ +#define MAX_LP_MSG_LEN 16384 + /* MTU * (2 ^ LP_PKTN_INI) shouldn't be bigger than 16KB */ lp_pktn_ini = ilog2(MAX_LP_MSG_LEN / mtu); if (WARN_ON(lp_pktn_ini >= 0xF)) return -EINVAL; -- 2.33.0