From patchwork Fri Dec 29 08:18:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 853723 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="fbYzrhqA"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3z7KMG2f8Fz9s7M for ; Fri, 29 Dec 2017 19:22:18 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932712AbdL2IWQ (ORCPT ); Fri, 29 Dec 2017 03:22:16 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:45495 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932651AbdL2IWJ (ORCPT ); Fri, 29 Dec 2017 03:22:09 -0500 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=DOmDyQ++Y5Y5WGvWNIPx/XVVonhzVqlJBFXWabs+3/g=; b=fbYzrhqAsnXJD3WTFuItQEePZ 1JYdct179xw8BqtVCfTXNx1A/Mr8oLzTbtpDtFaAPJnPnDDV8v7upAEuIwFRXPE8gsWFN31DrbI8r 5giAU1Rop6h1fDGvrhRBDhxDzXk14InbDovLUhBwrq2sO2gVR7aHMzrTUVc+LO8Qopf5HshmotLMd lgstA0woIy1IhWKc6sd5Z5yCMki5KbSEhGTQUmMZcYeL9VWyWRjsI/ZbXVFrVvxYQUu199knBXnn8 8Nmz1SBoTEOySepj2EewO/LcrcYyY03h9j4OLhNJ0CeiuL3L0FmV8WUeskAoIlmxH8hTq7b7v52nI VlJ3qihkQ==; Received: from 77.117.237.29.wireless.dyn.drei.com ([77.117.237.29] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.89 #1 (Red Hat Linux)) id 1eUpvO-0002dp-Uf; Fri, 29 Dec 2017 08:21:55 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, adi-buildroot-devel@lists.sourceforge.net, linux-c6x-dev@linux-c6x.org, linux-cris-kernel@axis.com, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-metag@vger.kernel.org, Michal Simek , linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, patches@groups.riscv.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, Guan Xuetao , x86@kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 36/67] x86: remove dma_alloc_coherent_mask Date: Fri, 29 Dec 2017 09:18:40 +0100 Message-Id: <20171229081911.2802-37-hch@lst.de> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171229081911.2802-1-hch@lst.de> References: <20171229081911.2802-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org These days all devices (including the ISA fallback device) have a coherent DMA mask set, so remove the workaround. Signed-off-by: Christoph Hellwig --- arch/x86/include/asm/dma-mapping.h | 18 ++---------------- arch/x86/kernel/pci-dma.c | 10 ++++------ arch/x86/mm/mem_encrypt.c | 4 +--- drivers/xen/swiotlb-xen.c | 16 +--------------- 4 files changed, 8 insertions(+), 40 deletions(-) diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 6277c83c0eb1..545bf3721bc0 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -44,26 +44,12 @@ extern void dma_generic_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_addr, unsigned long attrs); -static inline unsigned long dma_alloc_coherent_mask(struct device *dev, - gfp_t gfp) -{ - unsigned long dma_mask = 0; - - dma_mask = dev->coherent_dma_mask; - if (!dma_mask) - dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32); - - return dma_mask; -} - static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) { - unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); - - if (dma_mask <= DMA_BIT_MASK(24)) + if (dev->coherent_dma_mask <= DMA_BIT_MASK(24)) gfp |= GFP_DMA; #ifdef CONFIG_X86_64 - if (dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) + if (dev->coherent_dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) gfp |= GFP_DMA32; #endif return gfp; diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index df7ab02f959f..b59820872ec7 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -80,13 +80,10 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr, gfp_t flag, unsigned long attrs) { - unsigned long dma_mask; struct page *page; unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; dma_addr_t addr; - dma_mask = dma_alloc_coherent_mask(dev, flag); - again: page = NULL; /* CMA can be used only in the context which permits sleeping */ @@ -95,7 +92,7 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, flag); if (page) { addr = phys_to_dma(dev, page_to_phys(page)); - if (addr + size > dma_mask) { + if (addr + size > dev->coherent_dma_mask) { dma_release_from_contiguous(dev, page, count); page = NULL; } @@ -108,10 +105,11 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, return NULL; addr = phys_to_dma(dev, page_to_phys(page)); - if (addr + size > dma_mask) { + if (addr + size > dev->coherent_dma_mask) { __free_pages(page, get_order(size)); - if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) { + if (dev->coherent_dma_mask < DMA_BIT_MASK(32) && + !(flag & GFP_DMA)) { flag = (flag & ~GFP_DMA32) | GFP_DMA; goto again; } diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index 764b916ef7da..479586b8ca9b 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -203,12 +203,10 @@ void __init sme_early_init(void) static void *sev_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { - unsigned long dma_mask; unsigned int order; struct page *page; void *vaddr = NULL; - dma_mask = dma_alloc_coherent_mask(dev, gfp); order = get_order(size); /* @@ -226,7 +224,7 @@ static void *sev_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, * mask with it already cleared. */ addr = __sme_clr(phys_to_dma(dev, page_to_phys(page))); - if ((addr + size) > dma_mask) { + if ((addr + size) > dev->coherent_dma_mask) { __free_pages(page, get_order(size)); } else { vaddr = page_address(page); diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 5bb72d3f8337..e1c60899fdbc 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -53,20 +53,6 @@ * API. */ -#ifndef CONFIG_X86 -static unsigned long dma_alloc_coherent_mask(struct device *dev, - gfp_t gfp) -{ - unsigned long dma_mask = 0; - - dma_mask = dev->coherent_dma_mask; - if (!dma_mask) - dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32); - - return dma_mask; -} -#endif - #define XEN_SWIOTLB_ERROR_CODE (~(dma_addr_t)0x0) static char *xen_io_tlb_start, *xen_io_tlb_end; @@ -328,7 +314,7 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, return ret; if (hwdev && hwdev->coherent_dma_mask) - dma_mask = dma_alloc_coherent_mask(hwdev, flags); + dma_mask = hwdev->coherent_dma_mask; /* At this point dma_handle is the physical address, next we are * going to set it to the machine address.