Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965452AbbHLHKP (ORCPT ); Wed, 12 Aug 2015 03:10:15 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:53422 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965302AbbHLHKK (ORCPT ); Wed, 12 Aug 2015 03:10:10 -0400 From: Christoph Hellwig To: torvalds@linux-foundation.org, axboe@kernel.dk Cc: dan.j.williams@intel.com, vgupta@synopsys.com, hskinnemoen@gmail.com, egtvedt@samfundet.no, realmz6@gmail.com, dhowells@redhat.com, monstr@monstr.eu, x86@kernel.org, dwmw2@infradead.org, alex.williamson@redhat.com, grundler@parisc-linux.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-nvdimm@ml01.01.org, linux-media@vger.kernel.org Subject: [PATCH 29/31] parisc: handle page-less SG entries Date: Wed, 12 Aug 2015 09:05:48 +0200 Message-Id: <1439363150-8661-30-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 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2801 Lines: 78 Make all cache invalidation conditional on sg_has_page() and use sg_phys to get the physical address directly. Signed-off-by: Christoph Hellwig --- arch/parisc/kernel/pci-dma.c | 29 ++++++++++++++++++----------- 1 file changed, 18 insertions(+), 11 deletions(-) diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index b9402c9..6cad0e0 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -483,11 +483,13 @@ static int pa11_dma_map_sg(struct device *dev, struct scatterlist *sglist, int n BUG_ON(direction == DMA_NONE); for_each_sg(sglist, sg, nents, i) { - unsigned long vaddr = (unsigned long)sg_virt(sg); - - sg_dma_address(sg) = (dma_addr_t) virt_to_phys(vaddr); + sg_dma_address(sg) = sg_phys(sg); sg_dma_len(sg) = sg->length; - flush_kernel_dcache_range(vaddr, sg->length); + + if (sg_has_page(sg)) { + flush_kernel_dcache_range((unsigned long)sg_virt(sg), + sg->length); + } } return nents; } @@ -504,9 +506,10 @@ static void pa11_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, in /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ - for_each_sg(sglist, sg, nents, i) - flush_kernel_vmap_range(sg_virt(sg), sg->length); - return; + for_each_sg(sglist, sg, nents, i) { + if (sg_has_page(sg)) + flush_kernel_vmap_range(sg_virt(sg), sg->length); + } } static void pa11_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, unsigned long offset, size_t size, enum dma_data_direction direction) @@ -530,8 +533,10 @@ static void pa11_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ - for_each_sg(sglist, sg, nents, i) - flush_kernel_vmap_range(sg_virt(sg), sg->length); + for_each_sg(sglist, sg, nents, i) { + if (sg_has_page(sg)) + flush_kernel_vmap_range(sg_virt(sg), sg->length); + } } static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) @@ -541,8 +546,10 @@ static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist * /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ - for_each_sg(sglist, sg, nents, i) - flush_kernel_vmap_range(sg_virt(sg), sg->length); + for_each_sg(sglist, sg, nents, i) { + if (sg_has_page(sg)) + flush_kernel_vmap_range(sg_virt(sg), sg->length); + } } struct hppa_dma_ops pcxl_dma_ops = { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/