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=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=no 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 B2A51C4741F for ; Wed, 4 Nov 2020 09:53:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C63120781 for ; Wed, 4 Nov 2020 09:53:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="NGo9ostW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728437AbgKDJxL (ORCPT ); Wed, 4 Nov 2020 04:53:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727110AbgKDJxK (ORCPT ); Wed, 4 Nov 2020 04:53:10 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2AC42C0613D3; Wed, 4 Nov 2020 01:53:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:In-Reply-To:References; bh=10NYNDvXK47Xx4pemLtAWVco029+HRxpmX00NcH63GE=; b=NGo9ostWCiYg6sDnjnfEcDzzIu bw1JEU/3J8uJGjIQtQ3FGZ9lzz5hIabozqpexq5IduLABu5XJ2D0ympH0erezuMJAke3Q+N9+2j6y CQZarVzZ/0rhSi4bUrotHZGNaoSczpDABKXioE9c65Nxmn1Ccoe0A8LOAmfcZ2cUH8twiu62GDa/L l5fhVcQKYIfQKjkufFFoYGjsvK2Ox2oFBUmuutOyqSjOR3KNxhsbBO09mBu27EycME4Vq/ONGvnJp Ce2DQNYH/udzwjJIRM1gpsiIoXqJH24M/o6dZHhkX4lZ79dU0Es+bWJROyRq5sliVITz95pPA4/5A KK0kP2ww==; Received: from 089144208145.atnat0017.highway.a1.net ([89.144.208.145] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kaFTT-0001yT-E1; Wed, 04 Nov 2020 09:53:05 +0000 From: Christoph Hellwig To: Jason Gunthorpe Cc: Bjorn Helgaas , Logan Gunthorpe , linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org Subject: remove dma_virt_ops Date: Wed, 4 Nov 2020 10:50:47 +0100 Message-Id: <20201104095052.1222754-1-hch@lst.de> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Hi Jason, this series switches the RDMA core to opencode the special case of devices bypassing the DMA mapping in the RDMA ULPs. The virt ops have caused a bit of trouble due to the P2P code node working with them due to the fact that we'd do two dma mapping iterations for a single I/O, but also are a bit of layering violation and lead to more code than necessary. Tested with nvme-rdma over rxe. Diffstat: b/drivers/infiniband/core/device.c | 41 +++++++------- b/drivers/infiniband/core/rw.c | 2 b/drivers/infiniband/sw/rdmavt/Kconfig | 3 - b/drivers/infiniband/sw/rdmavt/mr.c | 6 -- b/drivers/infiniband/sw/rdmavt/vt.c | 8 -- b/drivers/infiniband/sw/rxe/Kconfig | 2 b/drivers/infiniband/sw/rxe/rxe_verbs.c | 7 -- b/drivers/infiniband/sw/rxe/rxe_verbs.h | 1 b/drivers/infiniband/sw/siw/Kconfig | 1 b/drivers/infiniband/sw/siw/siw.h | 1 b/drivers/infiniband/sw/siw/siw_main.c | 7 -- b/drivers/pci/p2pdma.c | 25 --------- b/include/linux/dma-mapping.h | 2 b/include/rdma/ib_verbs.h | 88 ++++++++++++++------------------ b/kernel/dma/Kconfig | 5 - b/kernel/dma/Makefile | 1 kernel/dma/virt.c | 61 ---------------------- 17 files changed, 66 insertions(+), 195 deletions(-)