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, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 C5C6FC4363A for ; Tue, 27 Oct 2020 10:19:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8269422281 for ; Tue, 27 Oct 2020 10:19:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2897757AbgJ0KTX (ORCPT ); Tue, 27 Oct 2020 06:19:23 -0400 Received: from ozlabs.ru ([107.174.27.60]:46374 "EHLO ozlabs.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2897233AbgJ0KTX (ORCPT ); Tue, 27 Oct 2020 06:19:23 -0400 Received: from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id DE5A7AE80276; Tue, 27 Oct 2020 06:18:07 -0400 (EDT) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Christoph Hellwig , Michael Ellerman , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Alexey Kardashevskiy Subject: [PATCH kernel v2 0/2] DMA, powerpc/dma: Fallback to dma_ops when persistent memory present Date: Tue, 27 Oct 2020 21:18:39 +1100 Message-Id: <20201027101841.96056-1-aik@ozlabs.ru> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This allows mixing direct DMA (to/from RAM) and IOMMU (to/from apersistent memory) on the PPC64/pseries platform. This replaces this: https://lkml.org/lkml/2020/10/20/1085 A lesser evil this is :) This is based on sha1 4525c8781ec0 Linus Torvalds "scsi: qla2xxx: remove incorrect sparse #ifdef". Please comment. Thanks. Alexey Kardashevskiy (2): dma: Allow mixing bypass and normal IOMMU operation powerpc/dma: Fallback to dma_ops when persistent memory present arch/powerpc/kernel/dma-iommu.c | 12 ++++- arch/powerpc/platforms/pseries/iommu.c | 44 ++++++++++++++----- kernel/dma/mapping.c | 61 +++++++++++++++++++++++++- arch/powerpc/Kconfig | 1 + kernel/dma/Kconfig | 4 ++ 5 files changed, 108 insertions(+), 14 deletions(-) -- 2.17.1