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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 E5A51C433E0 for ; Mon, 28 Dec 2020 14:13:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD48621D94 for ; Mon, 28 Dec 2020 14:13:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440112AbgL1ONO (ORCPT ); Mon, 28 Dec 2020 09:13:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:45022 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2439522AbgL1OLM (ORCPT ); Mon, 28 Dec 2020 09:11:12 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 334E8206C3; Mon, 28 Dec 2020 14:10:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609164656; bh=dc5OAZpa9xNIsOyxCytIC9WiWqe3rcRfKFLxic3kvz4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ShLSdvCEHqugpwQc3UHfo5nn8ugKxLVKWeAS/JJxOGocfUHMBlWuQpe32s+xsuuj+ RDsxmSO16vbZsjeVhsWYnfRSyGAdhG8Ois9/OUBGoKbApu3gHEJNHw4UCpGcGxktGa xVnSfo0RpcytQKgUFpxjwDudTnnbokH7lSNXN12s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yangyang Li , Weihang Li , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 5.10 252/717] RDMA/hns: Bugfix for calculation of extended sge Date: Mon, 28 Dec 2020 13:44:10 +0100 Message-Id: <20201228125033.060064393@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228125020.963311703@linuxfoundation.org> References: <20201228125020.963311703@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: Yangyang Li [ Upstream commit d34895c319faa1e0fc1a48c3b06bba6a8a39ba44 ] Page alignment is required when setting the number of extended sge according to the hardware's achivement. If the space of needed extended sge is greater than one page, the roundup_pow_of_two() can ensure that. But if the needed extended sge isn't 0 and can not be filled in a whole page, the driver should align it specifically. Fixes: 54d6638765b0 ("RDMA/hns: Optimize WQE buffer size calculating process") Link: https://lore.kernel.org/r/1606558959-48510-3-git-send-email-liweihang@huawei.com Signed-off-by: Yangyang Li Signed-off-by: Weihang Li Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_qp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c index 6c081dd985fc9..71ea8fd9041b9 100644 --- a/drivers/infiniband/hw/hns/hns_roce_qp.c +++ b/drivers/infiniband/hw/hns/hns_roce_qp.c @@ -432,7 +432,12 @@ static int set_extend_sge_param(struct hns_roce_dev *hr_dev, u32 sq_wqe_cnt, } hr_qp->sge.sge_shift = HNS_ROCE_SGE_SHIFT; - hr_qp->sge.sge_cnt = cnt; + + /* If the number of extended sge is not zero, they MUST use the + * space of HNS_HW_PAGE_SIZE at least. + */ + hr_qp->sge.sge_cnt = cnt ? + max(cnt, (u32)HNS_HW_PAGE_SIZE / HNS_ROCE_SGE_SIZE) : 0; return 0; } -- 2.27.0