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=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C8B17C04E87 for ; Mon, 20 May 2019 07:32:50 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9DDDC20656 for ; Mon, 20 May 2019 07:32:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="bSTtMEdH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9DDDC20656 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id C9C3FAE7; Mon, 20 May 2019 07:31:37 +0000 (UTC) Received: from smtp2.linuxfoundation.org (smtp2.linux-foundation.org [172.17.192.36]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 1816EA95 for ; Mon, 20 May 2019 07:31:37 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by smtp2.linuxfoundation.org (Postfix) with ESMTPS id AE94D1DD62 for ; Mon, 20 May 2019 07:31:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type: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=OVJQc8SY2rfhbpUGIxMsEy49jNO2L8/oQbPdUg4p/us=; b=bSTtMEdH6OoFBfbHZNzJyZ9JHp 80pJODAFGNoy+1DRkkVcp9hffdzPmolNN87nY6kjmrem/NsXo8bN3qa2UBbj2RvLyYLt/XmPjoTxp HhxGknTp5rEtAOIlUycKylV6nvnIfiUCBEI3j3wYz/PkZya0p3QspHmtPS1kiI6LdRQVDSdbSKbtM bj2DkRSMUKfZYmcAItRGp3x0dfiqYaXpyKj1kXRpT+lKLpT296CsEr6LG3rbMF9SEcvgN+3prFEmX /Byz5xjntZ0dJb1AWRxJy+SVwcnEfZ4u+dzhHyrMmIwslSXfeo+NrJFMwOBwTYLJly+FSz5qG28RX miWO8BCw==; Received: from 089144206147.atnat0015.highway.bob.at ([89.144.206.147] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hScld-0004mJ-Qh; Mon, 20 May 2019 07:31:30 +0000 From: Christoph Hellwig To: Robin Murphy Subject: [PATCH 19/24] iommu/dma: Refactor iommu_dma_get_sgtable Date: Mon, 20 May 2019 09:29:43 +0200 Message-Id: <20190520072948.11412-20-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190520072948.11412-1-hch@lst.de> References: <20190520072948.11412-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Cc: Tom Murphy , Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Inline __iommu_dma_get_sgtable_page into the main function, and use the fact that __iommu_dma_get_pages return NULL for remapped contigous allocations to simplify the code flow a bit. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- drivers/iommu/dma-iommu.c | 45 +++++++++++++++------------------------ 1 file changed, 17 insertions(+), 28 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 84761adbb1d4..fa95794868a4 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1097,42 +1097,31 @@ static int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma, return __iommu_dma_mmap(pages, size, vma); } -static int __iommu_dma_get_sgtable_page(struct sg_table *sgt, struct page *page, - size_t size) -{ - int ret = sg_alloc_table(sgt, 1, GFP_KERNEL); - - if (!ret) - sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); - return ret; -} - static int iommu_dma_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { - unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; - struct page **pages; + struct page *page; + int ret; - if (!is_vmalloc_addr(cpu_addr)) { - struct page *page = virt_to_page(cpu_addr); - return __iommu_dma_get_sgtable_page(sgt, page, size); - } + if (is_vmalloc_addr(cpu_addr)) { + struct page **pages = __iommu_dma_get_pages(cpu_addr); - if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) { - /* - * DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped, - * hence in the vmalloc space. - */ - struct page *page = vmalloc_to_page(cpu_addr); - return __iommu_dma_get_sgtable_page(sgt, page, size); + if (pages) { + return sg_alloc_table_from_pages(sgt, pages, + PAGE_ALIGN(size) >> PAGE_SHIFT, + 0, size, GFP_KERNEL); + } + + page = vmalloc_to_page(cpu_addr); + } else { + page = virt_to_page(cpu_addr); } - pages = __iommu_dma_get_pages(cpu_addr); - if (!pages) - return -ENXIO; - return sg_alloc_table_from_pages(sgt, pages, count, 0, size, - GFP_KERNEL); + ret = sg_alloc_table(sgt, 1, GFP_KERNEL); + if (!ret) + sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); + return ret; } static const struct dma_map_ops iommu_dma_ops = { -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu