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_PASS,USER_AGENT_GIT autolearn=ham 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 30BA7C46475 for ; Mon, 5 Nov 2018 12:19:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E3E2120819 for ; Mon, 5 Nov 2018 12:19:58 +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="EC9mYGM4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3E2120819 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729699AbeKEVjZ (ORCPT ); Mon, 5 Nov 2018 16:39:25 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:42740 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726358AbeKEVjZ (ORCPT ); Mon, 5 Nov 2018 16:39:25 -0500 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=6CZ8u2Hp6BszJscW6OKAY0pFx5HDYwXE3CfpN14wo7w=; b=EC9mYGM4U7MOgNIWhpuJr2gljA EN1yR9PngfOEjdUMJvpPTfdPwg4c0QsPeIJleGbGRmTuJSMKyH9Od8eDbCnwzSE9PsecxtztUxNvE VZBSgGt8z7o+SbqIK3n9PBmJ+4XYANqG6WfzIAtt03sbIl7F9XViV471HXwfAMbDnnXvqOMqSnX2b Y0OME3MeEhYK1riRoKrbVMAH+NTxt26W7666Tz3mV00xFloC0RgCHaKZPPPp9ud1gR7Wl5Qfb2ty5 eNmhU0YtJYAJRJkCGhbgvKZF3KS9k7kn3qCM3ag+IcDoMiB4QVyJZknQjMpNCLny8dUtTmxDLGiYv AXlohccQ==; Received: from 213-225-37-95.nat.highway.a1.net ([213.225.37.95] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gJdrB-0003ZI-Hq; Mon, 05 Nov 2018 12:19:49 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: Robin Murphy , Catalin Marinas , Will Deacon , Guo Ren , Laura Abbott , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/9] dma-mapping: support highmem in the generic remap allocator Date: Mon, 5 Nov 2018 13:19:27 +0100 Message-Id: <20181105121931.13481-6-hch@lst.de> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181105121931.13481-1-hch@lst.de> References: <20181105121931.13481-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org By using __dma_direct_alloc_pages we can deal entirely with struct page instead of having to derive a kernel virtual address. Signed-off-by: Christoph Hellwig --- kernel/dma/remap.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c index bc42766f52df..8f1fca34b894 100644 --- a/kernel/dma/remap.c +++ b/kernel/dma/remap.c @@ -196,7 +196,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs) { struct page *page = NULL; - void *ret, *kaddr; + void *ret; size = PAGE_ALIGN(size); @@ -208,10 +208,9 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, return ret; } - kaddr = dma_direct_alloc_pages(dev, size, dma_handle, flags, attrs); - if (!kaddr) + page = __dma_direct_alloc_pages(dev, size, dma_handle, flags, attrs); + if (!page) return NULL; - page = virt_to_page(kaddr); /* remove any dirty cache lines on the kernel alias */ arch_dma_prep_coherent(page, size); @@ -221,7 +220,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs), __builtin_return_address(0)); if (!ret) - dma_direct_free_pages(dev, size, kaddr, *dma_handle, attrs); + __dma_direct_free_pages(dev, size, page); return ret; } @@ -229,10 +228,11 @@ void arch_dma_free(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { if (!dma_free_from_pool(vaddr, PAGE_ALIGN(size))) { - void *kaddr = phys_to_virt(dma_to_phys(dev, dma_handle)); + phys_addr_t phys = dma_to_phys(dev, dma_handle); + struct page *page = pfn_to_page(__phys_to_pfn(phys)); vunmap(vaddr); - dma_direct_free_pages(dev, size, kaddr, dma_handle, attrs); + __dma_direct_free_pages(dev, size, page); } } -- 2.19.1