Message ID | 20171229081911.2802-29-hch@lst.de (mailing list archive) |
---|---|
State | Not Applicable |
Headers | show
Return-Path: <linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org> X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3z7MLJ0kbxz9s75 for <patchwork-incoming@ozlabs.org>; Fri, 29 Dec 2017 20:51:36 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="tsoRqp81"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3z7MLH6bYqzDqMg for <patchwork-incoming@ozlabs.org>; Fri, 29 Dec 2017 20:51:35 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="tsoRqp81"; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=bombadil.srs.infradead.org (client-ip=65.50.211.133; helo=bombadil.infradead.org; envelope-from=batv+bc2f3f92dc59fc4fc549+5241+infradead.org+hch@bombadil.srs.infradead.org; receiver=<UNKNOWN>) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="tsoRqp81"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3z7KLR2QrlzDqBn for <linuxppc-dev@lists.ozlabs.org>; Fri, 29 Dec 2017 19:21:35 +1100 (AEDT) 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=xnir3GBAtuwm/PnL+ZaPbcM0OOaHpdMqotQaPoRiPeo=; b=tsoRqp814xoAC9sLAHNxb6Mz4 C8uJq+mrhd+h0bKGoyji1CY6bvWMM2sGhIR+NxH6C1pj2PfzoVrIsmpDkTMkhAZBgNRMGHAAG1QMx +71WJcT3R29QfCMYDR44J9GJsY8JFxBNvfzbgDuLi44Zvk/bIlRHLPAGvplebOMRhMMlPUlhm5lkv pZGmS+mM9Yz/D9ZeYVVJ8x5iAXpTntKijfjeXJperYsEN8fdtJHAnHtiQRUZqwx98j2y8zuVKu2yl z+YhKtaYYgQr98ZyHQO8NP3ONfZmw3kFATnIV1EKkDuQ6kRvYOstXqI589jQzt3qEJHqeqyOcfyak aIw9VlYyg==; 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 1eUpur-0002CS-5W; Fri, 29 Dec 2017 08:21:21 +0000 From: Christoph Hellwig <hch@lst.de> To: iommu@lists.linux-foundation.org Subject: [PATCH 28/67] dma-direct: add support for CMA allocation Date: Fri, 29 Dec 2017 09:18:32 +0100 Message-Id: <20171229081911.2802-29-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 <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.24 Precedence: list List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org> List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe> List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/> List-Post: <mailto:linuxppc-dev@lists.ozlabs.org> List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help> List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe> Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, Guan Xuetao <gxt@mprc.pku.edu.cn>, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, x86@kernel.org, linux-snps-arc@lists.infradead.org, adi-buildroot-devel@lists.sourceforge.net, linux-m68k@lists.linux-m68k.org, patches@groups.riscv.org, linux-metag@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Michal Simek <monstr@monstr.eu>, linux-parisc@vger.kernel.org, linux-cris-kernel@axis.com, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" <linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org> |
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[01/67] x86: remove X86_PPRO_FENCE
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expand
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diff --git a/lib/dma-direct.c b/lib/dma-direct.c index ddd9dcf4e663..d0266b39788b 100644 --- a/lib/dma-direct.c +++ b/lib/dma-direct.c @@ -7,6 +7,7 @@ #include <linux/mm.h> #include <linux/dma-direct.h> #include <linux/scatterlist.h> +#include <linux/dma-contiguous.h> #include <linux/pfn.h> #define DIRECT_MAPPING_ERROR 0 @@ -30,19 +31,30 @@ check_addr(struct device *dev, dma_addr_t dma_addr, size_t size, static void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { - void *ret; + unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; + int page_order = get_order(size); + struct page *page = NULL; - ret = (void *)__get_free_pages(gfp, get_order(size)); - if (ret) - *dma_handle = phys_to_dma(dev, virt_to_phys(ret)); + /* CMA can be used only in the context which permits sleeping */ + if (gfpflags_allow_blocking(gfp)) + page = dma_alloc_from_contiguous(dev, count, page_order, gfp); + if (!page) + page = alloc_pages(gfp, page_order); + if (!page) + return NULL; - return ret; + *dma_handle = phys_to_dma(dev, page_to_phys(page)); + memset(page_address(page), 0, size); + return page_address(page); } static void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs) { - free_pages((unsigned long)cpu_addr, get_order(size)); + unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT; + + if (!dma_release_from_contiguous(dev, virt_to_page(cpu_addr), count)) + free_pages((unsigned long)cpu_addr, get_order(size)); } static dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
Try the CMA allocator for coherent allocations if supported. Roughly modelled after the x86 code. Signed-off-by: Christoph Hellwig <hch@lst.de> --- lib/dma-direct.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-)