From patchwork Fri Apr 20 08:02:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 901760 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eM1Uu/0Q"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40S8Cc3CMDz9s1w for ; Fri, 20 Apr 2018 18:29:16 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=y+74PCfvdUu9D7mtW+iXKX2it++jpDJWc1EgO9/TJ8U=; b=eM1Uu/0Q5IoshZ4yHxJkm2kz6C gBmRkZ4M0ogaZfRmqm+l51P/ugUzVL/wB/rWlAqqopnp8fzjzh0HnTXjfe42jZ3hsRShSNfsLTT4/ rqzLmq/ytRf92t+7McDeAO63TxKUj0/uQh1OIQRwYvnQWyLQjPUL017PfQ8Nicx2nQRCh4hfOlzNx cmgSi0OOmY3Mqe6nZdI8UVn9w1s6IE+unx3jCPU+qbu+scbcDIEbnGZvIRcv3bWGhvNe4zLaVJzWj XLwPPRewr06dbQfcYaPDd4maDGsoqUlxSMK2H/Sr2SvaXmdPtTYPmrcMRAtITVMWJGqof71nTr1Pp iNpsUusA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f9RPp-0000W1-Lf; Fri, 20 Apr 2018 08:29:09 +0000 Received: from static-242-42-24-46.ipcom.comunitel.net ([46.24.42.242] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1f9R19-0007O5-UO; Fri, 20 Apr 2018 08:03:40 +0000 From: Christoph Hellwig To: Subject: [PATCH 07/22] arm-nommu: use generic dma_noncoherent_ops Date: Fri, 20 Apr 2018 10:02:58 +0200 Message-Id: <20180420080313.18796-8-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180420080313.18796-1-hch@lst.de> References: <20180420080313.18796-1-hch@lst.de> X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-xtensa@linux-xtensa.org, Michal Simek , Vincent Chen , linux-c6x-dev@linux-c6x.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, openrisc@lists.librecores.org, Greentime Hu , linux-alpha@vger.kernel.org, sparclinux@vger.kernel.org, nios2-dev@lists.rocketboards.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Switch to the generic noncoherent direct mapping implementation for the nommu dma map implementation. Signed-off-by: Christoph Hellwig --- arch/arc/Kconfig | 1 + arch/arm/Kconfig | 4 + arch/arm/mm/dma-mapping-nommu.c | 139 +++++--------------------------- 3 files changed, 23 insertions(+), 121 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 89d47eac18b2..3a492a9aeaad 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -9,6 +9,7 @@ config ARC def_bool y select ARC_TIMERS + select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_HAS_SG_CHAIN diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f91f69174630..eacc45ac4e77 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -12,6 +12,8 @@ config ARM select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL select ARCH_HAS_STRICT_MODULE_RWX if MMU + select ARCH_HAS_SYNC_DMA_FOR_CPU if !MMU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE if !MMU select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAS_GCOV_PROFILE_ALL @@ -27,6 +29,8 @@ config ARM select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS select DMA_DIRECT_OPS if !MMU + select DMA_NONCOHERENT_OPS if !MMU + select DMA_NONCOHERENT_MMAP if !MMU select EDAC_SUPPORT select EDAC_ATOMIC_SCRUB select GENERIC_ALLOCATOR diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c index f448a0663b10..a74ed6632982 100644 --- a/arch/arm/mm/dma-mapping-nommu.c +++ b/arch/arm/mm/dma-mapping-nommu.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -26,18 +27,16 @@ * - MMU/MPU is off * - cpu is v7m w/o cache support * - device is coherent - * otherwise arm_nommu_dma_ops is used. + * otherwise dma_noncoherent_ops is used. * - * arm_nommu_dma_ops rely on consistent DMA memory (please, refer to + * dma_noncoherent_ops rely on consistent DMA memory (please, refer to * [1] on how to declare such memory). * * [1] Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt */ -static void *arm_nommu_dma_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) - +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t gfp, unsigned long attrs) { void *ret; @@ -65,9 +64,8 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size, return ret; } -static void arm_nommu_dma_free(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t dma_addr, - unsigned long attrs) +void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_addr, unsigned long attrs) { if (attrs & DMA_ATTR_NON_CONSISTENT) { dma_direct_free(dev, size, cpu_addr, dma_addr, attrs); @@ -81,9 +79,9 @@ static void arm_nommu_dma_free(struct device *dev, size_t size, return; } -static int arm_nommu_dma_mmap(struct device *dev, struct vm_area_struct *vma, - void *cpu_addr, dma_addr_t dma_addr, size_t size, - unsigned long attrs) +int arch_dma_mmap(struct device *dev, struct vm_area_struct *vma, + void *cpu_addr, dma_addr_t dma_addr, size_t size, + unsigned long attrs) { int ret; @@ -93,9 +91,8 @@ static int arm_nommu_dma_mmap(struct device *dev, struct vm_area_struct *vma, return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size); } - -static void __dma_page_cpu_to_dev(phys_addr_t paddr, size_t size, - enum dma_data_direction dir) +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { dmac_map_area(__va(paddr), size, dir); @@ -105,8 +102,8 @@ static void __dma_page_cpu_to_dev(phys_addr_t paddr, size_t size, outer_clean_range(paddr, paddr + size); } -static void __dma_page_dev_to_cpu(phys_addr_t paddr, size_t size, - enum dma_data_direction dir) +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { if (dir != DMA_TO_DEVICE) { outer_inv_range(paddr, paddr + size); @@ -114,110 +111,9 @@ static void __dma_page_dev_to_cpu(phys_addr_t paddr, size_t size, } } -static dma_addr_t arm_nommu_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir, - unsigned long attrs) -{ - dma_addr_t handle = page_to_phys(page) + offset; - - __dma_page_cpu_to_dev(handle, size, dir); - - return handle; -} - -static void arm_nommu_dma_unmap_page(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir, - unsigned long attrs) -{ - __dma_page_dev_to_cpu(handle, size, dir); -} - - -static int arm_nommu_dma_map_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sgl, sg, nents, i) { - sg_dma_address(sg) = sg_phys(sg); - sg_dma_len(sg) = sg->length; - __dma_page_cpu_to_dev(sg_dma_address(sg), sg_dma_len(sg), dir); - } - - return nents; -} - -static void arm_nommu_dma_unmap_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - struct scatterlist *sg; - int i; - - for_each_sg(sgl, sg, nents, i) - __dma_page_dev_to_cpu(sg_dma_address(sg), sg_dma_len(sg), dir); -} - -static void arm_nommu_dma_sync_single_for_device(struct device *dev, - dma_addr_t handle, size_t size, enum dma_data_direction dir) -{ - __dma_page_cpu_to_dev(handle, size, dir); -} - -static void arm_nommu_dma_sync_single_for_cpu(struct device *dev, - dma_addr_t handle, size_t size, enum dma_data_direction dir) -{ - __dma_page_cpu_to_dev(handle, size, dir); -} - -static void arm_nommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir) -{ - struct scatterlist *sg; - int i; - - for_each_sg(sgl, sg, nents, i) - __dma_page_cpu_to_dev(sg_dma_address(sg), sg_dma_len(sg), dir); -} - -static void arm_nommu_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir) -{ - struct scatterlist *sg; - int i; - - for_each_sg(sgl, sg, nents, i) - __dma_page_dev_to_cpu(sg_dma_address(sg), sg_dma_len(sg), dir); -} - -const struct dma_map_ops arm_nommu_dma_ops = { - .alloc = arm_nommu_dma_alloc, - .free = arm_nommu_dma_free, - .mmap = arm_nommu_dma_mmap, - .map_page = arm_nommu_dma_map_page, - .unmap_page = arm_nommu_dma_unmap_page, - .map_sg = arm_nommu_dma_map_sg, - .unmap_sg = arm_nommu_dma_unmap_sg, - .sync_single_for_device = arm_nommu_dma_sync_single_for_device, - .sync_single_for_cpu = arm_nommu_dma_sync_single_for_cpu, - .sync_sg_for_device = arm_nommu_dma_sync_sg_for_device, - .sync_sg_for_cpu = arm_nommu_dma_sync_sg_for_cpu, -}; -EXPORT_SYMBOL(arm_nommu_dma_ops); - -static const struct dma_map_ops *arm_nommu_get_dma_map_ops(bool coherent) -{ - return coherent ? &dma_direct_ops : &arm_nommu_dma_ops; -} - void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, const struct iommu_ops *iommu, bool coherent) { - const struct dma_map_ops *dma_ops; - if (IS_ENABLED(CONFIG_CPU_V7M)) { /* * Cache support for v7m is optional, so can be treated as @@ -233,9 +129,10 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, dev->archdata.dma_coherent = (get_cr() & CR_M) ? coherent : true; } - dma_ops = arm_nommu_get_dma_map_ops(dev->archdata.dma_coherent); - - set_dma_ops(dev, dma_ops); + if (dev->archdata.dma_coherent) + set_dma_ops(dev, &dma_direct_ops); + else + set_dma_ops(dev, &dma_noncoherent_ops); } void arch_teardown_dma_ops(struct device *dev)