From patchwork Wed Aug 12 07:05:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 506392 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 0867D140271 for ; Wed, 12 Aug 2015 17:44:39 +1000 (AEST) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id DE5B41A362B for ; Wed, 12 Aug 2015 17:44:38 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id ECCCE1A067D for ; Wed, 12 Aug 2015 17:09:41 +1000 (AEST) Received: from p5de57192.dip0.t-ipconnect.de ([93.229.113.146] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZPQAH-0001lK-5m; Wed, 12 Aug 2015 07:09:33 +0000 From: Christoph Hellwig To: torvalds@linux-foundation.org, axboe@kernel.dk Subject: [PATCH 19/31] arc: handle page-less SG entries Date: Wed, 12 Aug 2015 09:05:38 +0200 Message-Id: <1439363150-8661-20-git-send-email-hch@lst.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439363150-8661-1-git-send-email-hch@lst.de> References: <1439363150-8661-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Mailman-Approved-At: Wed, 12 Aug 2015 17:20:56 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, linux-nvdimm@ml01.01.org, dhowells@redhat.com, sparclinux@vger.kernel.org, egtvedt@samfundet.no, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, x86@kernel.org, dwmw2@infradead.org, hskinnemoen@gmail.com, linux-xtensa@linux-xtensa.org, grundler@parisc-linux.org, realmz6@gmail.com, alex.williamson@redhat.com, dan.j.williams@intel.com, linux-metag@vger.kernel.org, monstr@monstr.eu, linux-parisc@vger.kernel.org, vgupta@synopsys.com, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-media@vger.kernel.org, linuxppc-dev@lists.ozlabs.org MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Make all cache invalidation conditional on sg_has_page() and use sg_phys to get the physical address directly. Signed-off-by: Christoph Hellwig Acked-by: Vineet Gupta --- arch/arc/include/asm/dma-mapping.h | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/arch/arc/include/asm/dma-mapping.h b/arch/arc/include/asm/dma-mapping.h index 2d28ba9..42eb526 100644 --- a/arch/arc/include/asm/dma-mapping.h +++ b/arch/arc/include/asm/dma-mapping.h @@ -108,9 +108,13 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, struct scatterlist *s; int i; - for_each_sg(sg, s, nents, i) - s->dma_address = dma_map_page(dev, sg_page(s), s->offset, - s->length, dir); + for_each_sg(sg, s, nents, i) { + if (sg_has_page(s)) { + _dma_cache_sync((unsigned long)sg_virt(s), s->length, + dir); + } + s->dma_address = sg_phys(s); + } return nents; } @@ -163,8 +167,12 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, int i; struct scatterlist *sg; - for_each_sg(sglist, sg, nelems, i) - _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); + for_each_sg(sglist, sg, nelems, i) { + if (sg_has_page(sg)) { + _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, + dir); + } + } } static inline void @@ -174,8 +182,12 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int i; struct scatterlist *sg; - for_each_sg(sglist, sg, nelems, i) - _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); + for_each_sg(sglist, sg, nelems, i) { + if (sg_has_page(sg)) { + _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, + dir); + } + } } static inline int dma_supported(struct device *dev, u64 dma_mask)