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=-12.8 required=3.0 tests=BAYES_00,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=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 AFE50C47428 for ; Wed, 30 Sep 2020 08:56:16 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 5F0C320738 for ; Wed, 30 Sep 2020 08:56:16 +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="W3yrPRZq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5F0C320738 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 localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 3DC8986142; Wed, 30 Sep 2020 08:56:16 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lgiHpD2a3DMO; Wed, 30 Sep 2020 08:56:15 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 509BF85F10; Wed, 30 Sep 2020 08:56:15 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4A15EC0890; Wed, 30 Sep 2020 08:56:15 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7CCC4C016F for ; Wed, 30 Sep 2020 08:56:12 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 5F65922654 for ; Wed, 30 Sep 2020 08:56:12 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2d6ud-wKX7yp for ; Wed, 30 Sep 2020 08:56:07 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by silver.osuosl.org (Postfix) with ESMTPS id 3D3982155B for ; Wed, 30 Sep 2020 08:56:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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; bh=HbQ6m17pq6ato1qhmBn11ulfqsTTotEdbjnmREJ4qwI=; b=W3yrPRZq2GYwbFtfQyUjs2jhqk tcwGGDJf/Q9EwEA/R1pqoNCS0iu1NiHuwCrLBSAIk81AviOiwP5p4eIqoY5t9XVpCgYiKXCWPfAah RnwQleeay5fa3M9kTJhZ75UOnXxbp6DBRFxk6duecHl7ScKcNCYNrs44geKXZ0aSIfs15fSecN3bd 1lMnOmY9aLnGUw5HwSuMk8NIcVmBNTQ6BWbjtSeGs9r4CSBWDj/mg0+yXosVbgxzKew35bIpm0+l1 DuN3oZLt7gNCcWuVYAOq5dFaPupwAa6QHzmpJzi22LiqHD39wSTl4cOnV29gGkCqnG1Ht8jap3n1S SOJ1wwtQ==; Received: from [2001:4bb8:180:7b62:c70:4a89:bc61:4] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNXu8-0003u8-Jj; Wed, 30 Sep 2020 08:56:05 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Subject: [PATCH 8/9] dma-mapping: move large parts of to kernel/dma Date: Wed, 30 Sep 2020 10:55:47 +0200 Message-Id: <20200930085548.920261-9-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200930085548.920261-1-hch@lst.de> References: <20200930085548.920261-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Cc: linux-arch@vger.kernel.org, Sekhar Nori , Russell King , linux-kernel@vger.kernel.org, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 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 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Most of the dma_direct symbols should only be used by direct.c and mapping.c, so move them to kernel/dma. In fact more of dma-direct.h should eventually move, but that will require more coordination with other subsystems. Signed-off-by: Christoph Hellwig --- include/linux/dma-direct.h | 106 --------------------------------- kernel/dma/direct.c | 2 +- kernel/dma/direct.h | 119 +++++++++++++++++++++++++++++++++++++ kernel/dma/mapping.c | 2 +- 4 files changed, 121 insertions(+), 108 deletions(-) create mode 100644 kernel/dma/direct.h diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h index 38ed3b55034d50..a2d6640c42c04e 100644 --- a/include/linux/dma-direct.h +++ b/include/linux/dma-direct.h @@ -120,114 +120,8 @@ struct page *dma_direct_alloc_pages(struct device *dev, size_t size, void dma_direct_free_pages(struct device *dev, size_t size, struct page *page, dma_addr_t dma_addr, enum dma_data_direction dir); -int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt, - void *cpu_addr, dma_addr_t dma_addr, size_t size, - unsigned long attrs); -bool dma_direct_can_mmap(struct device *dev); -int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size, - unsigned long attrs); int dma_direct_supported(struct device *dev, u64 mask); -bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr); -int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, - enum dma_data_direction dir, unsigned long attrs); dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr, size_t size, enum dma_data_direction dir, unsigned long attrs); -size_t dma_direct_max_mapping_size(struct device *dev); -#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ - defined(CONFIG_SWIOTLB) -void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir); -#else -static inline void dma_direct_sync_sg_for_device(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir) -{ -} -#endif - -#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ - defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \ - defined(CONFIG_SWIOTLB) -void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir, unsigned long attrs); -void dma_direct_sync_sg_for_cpu(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir); -#else -static inline void dma_direct_unmap_sg(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir, - unsigned long attrs) -{ -} -static inline void dma_direct_sync_sg_for_cpu(struct device *dev, - struct scatterlist *sgl, int nents, enum dma_data_direction dir) -{ -} -#endif - -static inline void dma_direct_sync_single_for_device(struct device *dev, - dma_addr_t addr, size_t size, enum dma_data_direction dir) -{ - phys_addr_t paddr = dma_to_phys(dev, addr); - - if (unlikely(is_swiotlb_buffer(paddr))) - swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE); - - if (!dev_is_dma_coherent(dev)) - arch_sync_dma_for_device(paddr, size, dir); -} - -static inline void dma_direct_sync_single_for_cpu(struct device *dev, - dma_addr_t addr, size_t size, enum dma_data_direction dir) -{ - phys_addr_t paddr = dma_to_phys(dev, addr); - - if (!dev_is_dma_coherent(dev)) { - arch_sync_dma_for_cpu(paddr, size, dir); - arch_sync_dma_for_cpu_all(); - } - - if (unlikely(is_swiotlb_buffer(paddr))) - swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU); - - if (dir == DMA_FROM_DEVICE) - arch_dma_mark_clean(paddr, size); -} - -static inline dma_addr_t dma_direct_map_page(struct device *dev, - struct page *page, unsigned long offset, size_t size, - enum dma_data_direction dir, unsigned long attrs) -{ - phys_addr_t phys = page_to_phys(page) + offset; - dma_addr_t dma_addr = phys_to_dma(dev, phys); - - if (unlikely(swiotlb_force == SWIOTLB_FORCE)) - return swiotlb_map(dev, phys, size, dir, attrs); - - if (unlikely(!dma_capable(dev, dma_addr, size, true))) { - if (swiotlb_force != SWIOTLB_NO_FORCE) - return swiotlb_map(dev, phys, size, dir, attrs); - - dev_WARN_ONCE(dev, 1, - "DMA addr %pad+%zu overflow (mask %llx, bus limit %llx).\n", - &dma_addr, size, *dev->dma_mask, dev->bus_dma_limit); - return DMA_MAPPING_ERROR; - } - - if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - arch_sync_dma_for_device(phys, size, dir); - return dma_addr; -} - -static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir, unsigned long attrs) -{ - phys_addr_t phys = dma_to_phys(dev, addr); - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - dma_direct_sync_single_for_cpu(dev, addr, size, dir); - - if (unlikely(is_swiotlb_buffer(phys))) - swiotlb_tbl_unmap_single(dev, phys, size, size, dir, attrs); -} #endif /* _LINUX_DMA_DIRECT_H */ diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 87697c86f0b82a..bf9f77623022bb 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -7,13 +7,13 @@ #include /* for max_pfn */ #include #include -#include #include #include #include #include #include #include +#include "direct.h" /* * Most architectures use ZONE_DMA for the first 16 Megabytes, but some use it diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h new file mode 100644 index 00000000000000..b9861557873768 --- /dev/null +++ b/kernel/dma/direct.h @@ -0,0 +1,119 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Christoph Hellwig. + * + * DMA operations that map physical memory directly without using an IOMMU. + */ +#ifndef _KERNEL_DMA_DIRECT_H +#define _KERNEL_DMA_DIRECT_H + +#include + +int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt, + void *cpu_addr, dma_addr_t dma_addr, size_t size, + unsigned long attrs); +bool dma_direct_can_mmap(struct device *dev); +int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, + void *cpu_addr, dma_addr_t dma_addr, size_t size, + unsigned long attrs); +bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr); +int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, + enum dma_data_direction dir, unsigned long attrs); +size_t dma_direct_max_mapping_size(struct device *dev); + +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_SWIOTLB) +void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction dir); +#else +static inline void dma_direct_sync_sg_for_device(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir) +{ +} +#endif + +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \ + defined(CONFIG_SWIOTLB) +void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction dir, unsigned long attrs); +void dma_direct_sync_sg_for_cpu(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir); +#else +static inline void dma_direct_unmap_sg(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir, + unsigned long attrs) +{ +} +static inline void dma_direct_sync_sg_for_cpu(struct device *dev, + struct scatterlist *sgl, int nents, enum dma_data_direction dir) +{ +} +#endif + +static inline void dma_direct_sync_single_for_device(struct device *dev, + dma_addr_t addr, size_t size, enum dma_data_direction dir) +{ + phys_addr_t paddr = dma_to_phys(dev, addr); + + if (unlikely(is_swiotlb_buffer(paddr))) + swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE); + + if (!dev_is_dma_coherent(dev)) + arch_sync_dma_for_device(paddr, size, dir); +} + +static inline void dma_direct_sync_single_for_cpu(struct device *dev, + dma_addr_t addr, size_t size, enum dma_data_direction dir) +{ + phys_addr_t paddr = dma_to_phys(dev, addr); + + if (!dev_is_dma_coherent(dev)) { + arch_sync_dma_for_cpu(paddr, size, dir); + arch_sync_dma_for_cpu_all(); + } + + if (unlikely(is_swiotlb_buffer(paddr))) + swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU); + + if (dir == DMA_FROM_DEVICE) + arch_dma_mark_clean(paddr, size); +} + +static inline dma_addr_t dma_direct_map_page(struct device *dev, + struct page *page, unsigned long offset, size_t size, + enum dma_data_direction dir, unsigned long attrs) +{ + phys_addr_t phys = page_to_phys(page) + offset; + dma_addr_t dma_addr = phys_to_dma(dev, phys); + + if (unlikely(swiotlb_force == SWIOTLB_FORCE)) + return swiotlb_map(dev, phys, size, dir, attrs); + + if (unlikely(!dma_capable(dev, dma_addr, size, true))) { + if (swiotlb_force != SWIOTLB_NO_FORCE) + return swiotlb_map(dev, phys, size, dir, attrs); + + dev_WARN_ONCE(dev, 1, + "DMA addr %pad+%zu overflow (mask %llx, bus limit %llx).\n", + &dma_addr, size, *dev->dma_mask, dev->bus_dma_limit); + return DMA_MAPPING_ERROR; + } + + if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + arch_sync_dma_for_device(phys, size, dir); + return dma_addr; +} + +static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir, unsigned long attrs) +{ + phys_addr_t phys = dma_to_phys(dev, addr); + + if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) + dma_direct_sync_single_for_cpu(dev, addr, size, dir); + + if (unlikely(is_swiotlb_buffer(phys))) + swiotlb_tbl_unmap_single(dev, phys, size, size, dir, attrs); +} +#endif /* _KERNEL_DMA_DIRECT_H */ diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 335ba183e0956a..51bb8fa8eb8948 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -7,7 +7,6 @@ */ #include /* for max_pfn */ #include -#include #include #include #include @@ -15,6 +14,7 @@ #include #include #include "debug.h" +#include "direct.h" /* * Managed DMA API -- 2.28.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu