From patchwork Tue May 22 12:04:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10418343 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D1211600CC for ; Tue, 22 May 2018 12:06:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BE4EB289DF for ; Tue, 22 May 2018 12:06:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B191E289D1; Tue, 22 May 2018 12:06:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 212BD289D1 for ; Tue, 22 May 2018 12:06:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752831AbeEVMGb (ORCPT ); Tue, 22 May 2018 08:06:31 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:56010 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751361AbeEVMGT (ORCPT ); Tue, 22 May 2018 08:06:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=Lpbuxnh9XBpFSeI02TjNsx17CqPSzEqflfpopAg3Okc=; b=os01+qlJ0AdlogIAoZQOY8MGl y5vfQ3XIeNQLE5f2NAPTtvLPrLJPKtrf0gC5HMxCegIa21W9mnNsCRar71PowhtDozT9lQ/iK/CGZ 70WokvKGH92cLcjyIWarXX3oSF7/zNMzHi7iLnTcqe2L6xyTAWcRHn0CsChs1aKvgbipDnVdFGILK CSazQ6egDNEVdwAY00dhY6Y9x8RwTsTyrVtv7Y/sFNUhg3oac9T8lvLIBNAwSHNWPq82VYmddNlIo Uuk9V/Zz0vzKmdQmJOtEDU8KdADtu4Mxb6K4i4es7GKHOUhxVBAR8S29JkCiny92WBZnqSjb5IuRz NaaGNT4DA==; Received: from 80-109-164-210.cable.dynamic.surfer.at ([80.109.164.210] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fL63J-0001aJ-3D; Tue, 22 May 2018 12:06:05 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: linux-arch@vger.kernel.org, Michal Simek , Greentime Hu , Vincent Chen , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-kernel@vger.kernel.org Subject: [PATCH 25/25] parisc: use generic dma_noncoherent_ops Date: Tue, 22 May 2018 14:04:30 +0200 Message-Id: <20180522120430.28709-26-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180522120430.28709-1-hch@lst.de> References: <20180522120430.28709-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Switch to the generic noncoherent direct mapping implementation. Fix sync_single_for_cpu to do skip the cache flush unless the transfer is to the device to match the more tested unmap_single path which should have the same cache coherency implications. Signed-off-by: Christoph Hellwig --- arch/parisc/Kconfig | 4 + arch/parisc/include/asm/dma-mapping.h | 4 - arch/parisc/kernel/pci-dma.c | 145 ++------------------------ arch/parisc/kernel/setup.c | 2 +- 4 files changed, 16 insertions(+), 139 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 4d8f64d48597..4993c6dc8358 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -188,6 +188,10 @@ config PA20 config PA11 def_bool y depends on PA7000 || PA7100LC || PA7200 || PA7300LC + select ARCH_HAS_SYNC_DMA_FOR_CPU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select DMA_NONCOHERENT_OPS + select DMA_NONCOHERENT_CACHE_SYNC config PREFETCH def_bool y diff --git a/arch/parisc/include/asm/dma-mapping.h b/arch/parisc/include/asm/dma-mapping.h index eeec8dd18e74..44a9f97194aa 100644 --- a/arch/parisc/include/asm/dma-mapping.h +++ b/arch/parisc/include/asm/dma-mapping.h @@ -21,10 +21,6 @@ ** flush/purge and allocate "regular" cacheable pages for everything. */ -#ifdef CONFIG_PA11 -extern const struct dma_map_ops pa11_dma_ops; -#endif - extern const struct dma_map_ops *hppa_dma_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index 4d7506336918..87a7926cda6f 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -21,13 +21,12 @@ #include #include #include -#include #include #include #include #include -#include -#include +#include +#include #include #include /* for DMA_CHUNK_SIZE */ @@ -450,7 +449,7 @@ static void *pcx_dma_alloc(struct device *dev, size_t size, return addr; } -static void *pa11_dma_alloc(struct device *dev, size_t size, +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { @@ -460,7 +459,7 @@ static void *pa11_dma_alloc(struct device *dev, size_t size, return pcx_dma_alloc(dev, size, dma_handle, gfp, attrs); } -static void pa11_dma_free(struct device *dev, size_t size, void *vaddr, +void arch_dma_free(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, unsigned long attrs) { int order = get_order(size); @@ -475,142 +474,20 @@ static void pa11_dma_free(struct device *dev, size_t size, void *vaddr, free_pages((unsigned long)vaddr, get_order(size)); } -static dma_addr_t pa11_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { - void *addr = page_address(page) + offset; - BUG_ON(direction == DMA_NONE); - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - flush_kernel_dcache_range((unsigned long) addr, size); - - return virt_to_phys(addr); -} - -static void pa11_dma_unmap_page(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction, - unsigned long attrs) -{ - BUG_ON(direction == DMA_NONE); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return; - - if (direction == DMA_TO_DEVICE) - return; - - /* - * For PCI_DMA_FROMDEVICE this flush is not necessary for the - * simple map/unmap case. However, it IS necessary if if - * pci_dma_sync_single_* has been called and the buffer reused. - */ - - flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), size); -} - -static int pa11_dma_map_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - 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_len(sg) = sg->length; - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - continue; - - flush_kernel_dcache_range(vaddr, sg->length); - } - return nents; -} - -static void pa11_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - BUG_ON(direction == DMA_NONE); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return; - - if (direction == DMA_TO_DEVICE) - return; - - /* 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_dcache_range(sg_virt(sg), sg->length); -} - -static void pa11_dma_sync_single_for_cpu(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); - - flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), - size); -} - -static void pa11_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); - - flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), - size); -} - -static void pa11_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) -{ - int i; - struct scatterlist *sg; - - /* 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_dcache_range(sg_virt(sg), sg->length); + flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size); } -static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { - int i; - struct scatterlist *sg; - - /* 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_dcache_range(sg_virt(sg), sg->length); + flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size); } -static void pa11_dma_cache_sync(struct device *dev, void *vaddr, size_t size, +void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) { flush_kernel_dcache_range((unsigned long)vaddr, size); } - -const struct dma_map_ops pa11_dma_ops = { - .alloc = pa11_dma_alloc, - .free = pa11_dma_free, - .map_page = pa11_dma_map_page, - .unmap_page = pa11_dma_unmap_page, - .map_sg = pa11_dma_map_sg, - .unmap_sg = pa11_dma_unmap_sg, - .sync_single_for_cpu = pa11_dma_sync_single_for_cpu, - .sync_single_for_device = pa11_dma_sync_single_for_device, - .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, - .sync_sg_for_device = pa11_dma_sync_sg_for_device, - .cache_sync = pa11_dma_cache_sync, -}; diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c index 5c8450a22255..4e87c35c22b7 100644 --- a/arch/parisc/kernel/setup.c +++ b/arch/parisc/kernel/setup.c @@ -102,7 +102,7 @@ void __init dma_ops_init(void) case pcxl: /* falls through */ case pcxs: case pcxt: - hppa_dma_ops = &pa11_dma_ops; + hppa_dma_ops = &dma_noncoherent_ops; break; default: break;