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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 8BA81C2BA83 for ; Wed, 12 Feb 2020 07:35:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D0F621734 for ; Wed, 12 Feb 2020 07:35:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581492950; bh=LnUDr37rQUU6Q8MqtMqnYEkQ8OmvPxE2AUHkkQRe42s=; h=From:To:Cc:Subject:Date:List-ID:From; b=srauj/ORYqJ6ZsbwgLjDFx8X2rkUn6w6QzKJZMVnUTF6aH2/mdUBwEd3WKMAPRoPo GbHJuOSu61nwMWKv6QbwdAWZKReOPeNZ12/EG009UQ2BWMpUriAqHauLitPorB919j cc/7cQiMg6qBVU3279mC6lRnE1TAHxCmlx0ylMHw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728375AbgBLHft (ORCPT ); Wed, 12 Feb 2020 02:35:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:39542 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728348AbgBLHft (ORCPT ); Wed, 12 Feb 2020 02:35:49 -0500 Received: from localhost (unknown [213.57.247.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 60A8A20848; Wed, 12 Feb 2020 07:35:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581492949; bh=LnUDr37rQUU6Q8MqtMqnYEkQ8OmvPxE2AUHkkQRe42s=; h=From:To:Cc:Subject:Date:From; b=wEyHdV3+yn6jNE27p5IWHo5yaIheGGy/MDheYRh7G3G9MI5SkZ61W9LxQBpkkPs0Z q7AypnXzEQOtx39bu6SJbe4cvG7vBjR9btBlNR2p0gIKr7qEe10ZPUTqkMJwOY5a8U HqRWG+8BobcP8g5wIueSH+lO5zSJGjbZmzdS5r4E= From: Leon Romanovsky To: Doug Ledford , Jason Gunthorpe Cc: Michael Guralnik , RDMA mailing list , Leon Romanovsky Subject: [PATCH rdma-next] RDMA/core: Add weak ordering dma attr to dma mapping Date: Wed, 12 Feb 2020 09:35:59 +0200 Message-Id: <20200212073559.684139-1-leon@kernel.org> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Michael Guralnik For memory regions registered with IB_ACCESS_RELAXED_ORDERING will be dma mapped with the DMA_ATTR_WEAK_ORDERING. This will allow reads and writes to the mapping to be weakly ordered, such change can enhance performance on some supporting architectures. Signed-off-by: Michael Guralnik Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/umem.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 06b6125b5ae1..82455a1392f1 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -197,6 +197,7 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr, unsigned long lock_limit; unsigned long new_pinned; unsigned long cur_base; + unsigned long dma_attr = 0; struct mm_struct *mm; unsigned long npages; int ret; @@ -278,10 +279,12 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr, sg_mark_end(sg); - umem->nmap = ib_dma_map_sg(device, - umem->sg_head.sgl, - umem->sg_nents, - DMA_BIDIRECTIONAL); + if (access & IB_ACCESS_RELAXED_ORDERING) + dma_attr |= DMA_ATTR_WEAK_ORDERING; + + umem->nmap = + ib_dma_map_sg_attrs(device, umem->sg_head.sgl, umem->sg_nents, + DMA_BIDIRECTIONAL, dma_attr); if (!umem->nmap) { ret = -ENOMEM; -- 2.24.1