From patchwork Tue May 22 12:04:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10418493 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CC3D66032A for ; Tue, 22 May 2018 12:16:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC52328C67 for ; Tue, 22 May 2018 12:16:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B076E28C6A; Tue, 22 May 2018 12:16:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4574B28C67 for ; Tue, 22 May 2018 12:16:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752089AbeEVMFV (ORCPT ); Tue, 22 May 2018 08:05:21 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:52936 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751441AbeEVMFQ (ORCPT ); Tue, 22 May 2018 08:05:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Ar/Cluo49COnQp0eRZIk86TP/uY6z/moya5VtQ2t5OM=; b=OK34m0doHy6KNU9GWnB/ECSCl UuFosNpmHK4DqUcfOMFj4jRZa/6joumZwv6D+jbQRmOI7qHjVKbvawPCzjJVXxH5tbMm3siNx+4vO n8SmgZqqUgpsdC6dGNN8oHm6ZBKBSZpq0B5NzzVpfXhLvQ1JvOgaE5y9BC81/RIpeUYs6k0b0p4Cj FUa8dRJXkq4BFeKMLW3wy1Tn2IiPLpnfNbOm+DyfTiV1l1x2rWvaGwMXVhy0xNFVFcjVgPwWZFfMr W7RlYeXDeo5xKtWJk0Jl96lGsHftv8ifhR1pfQtzQg0g6GIswpba/b6GpncLj1fqQbqPK33/aGFGL pjviO9afQ==; Received: from 80-109-164-210.cable.dynamic.surfer.at ([80.109.164.210] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fL62K-0008Dk-9X; Tue, 22 May 2018 12:05:05 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: linux-arch@vger.kernel.org, Michal Simek , Greentime Hu , Vincent Chen , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/25] nds32: implement the unmap_sg DMA operation Date: Tue, 22 May 2018 14:04:14 +0200 Message-Id: <20180522120430.28709-10-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180522120430.28709-1-hch@lst.de> References: <20180522120430.28709-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This matches the implementation of the more commonly used unmap_single routines and the sync_sg_for_cpu method which should provide equivalent cache maintainance. Signed-off-by: Christoph Hellwig --- arch/nds32/kernel/dma.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c index 4e6fb4ffd3f7..43d7fd432bb6 100644 --- a/arch/nds32/kernel/dma.c +++ b/arch/nds32/kernel/dma.c @@ -426,6 +426,12 @@ static void nds32_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, enum dma_data_direction dir, unsigned long attrs) { + int i; + + for (i = 0; i < nhwentries; i++, sg++) { + nds32_dma_sync_single_for_cpu(dev, sg_dma_address(sg), + sg->length, dir); + } } struct dma_map_ops nds32_dma_ops = {