From patchwork Sat Dec 8 17:36:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10719587 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B3F8F1932 for ; Sat, 8 Dec 2018 17:37:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 99B9B2AB65 for ; Sat, 8 Dec 2018 17:37:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8E0BE2AFA1; Sat, 8 Dec 2018 17:37:28 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 3CB362AB65 for ; Sat, 8 Dec 2018 17:37:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726283AbeLHRh1 (ORCPT ); Sat, 8 Dec 2018 12:37:27 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:43020 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726262AbeLHRhU (ORCPT ); Sat, 8 Dec 2018 12:37:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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: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=rf2INvOvASb+bwKkLRGXlrOoY5ukby0zM9d4/mbNcZk=; b=boH8jLoroyijxSr4D+a04FIPAF nnSdifDeV7Nfok8PX4Tr7695v6WUMHSyHoUoUUzer4+YY2wD2i+ho+3xCco2Rm2h4UJg7chVghL9x l82519lVq9LNMO7K1jLjvdnU3qYRzoprOhssFDWlcMAOEGSjxMwAKLXX8NcduitKLF98+G/8HpcD9 Obsk/bnCKyp+j7qlhMokloDgqwMRvVsOmkNxwgJ3ZApvV1awPnzHoPHcVAjTdq2WkvFkO1vnIqQK0 acQW+J00CEFIXFopETVhAyyDm/0zgl1eX4RqF66JjIsnN8DkHNA3hr96Oy01ye//QNJ18IhlhZ5mY iItdF11g==; Received: from [184.48.100.57] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVgXJ-00054J-1i; Sat, 08 Dec 2018 17:37:05 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: Robin Murphy , Vineet Gupta , "Matwey V. Kornilov" , Laurent Pinchart , linux-snps-arc@lists.infradead.org, Ezequiel Garcia , linux-media@vger.kernel.org, linux-arm-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, sparclinux@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH 06/10] sparc64/iommu: implement DMA_ATTR_NON_CONSISTENT Date: Sat, 8 Dec 2018 09:36:58 -0800 Message-Id: <20181208173702.15158-7-hch@lst.de> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181208173702.15158-1-hch@lst.de> References: <20181208173702.15158-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Just allocate the memory and use map_page to map the memory. Signed-off-by: Christoph Hellwig Acked-by: David S. Miller --- arch/sparc/kernel/iommu.c | 33 +++++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 10 deletions(-) diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c index 4bf0497e0704..4ce24c9dc691 100644 --- a/arch/sparc/kernel/iommu.c +++ b/arch/sparc/kernel/iommu.c @@ -699,14 +699,19 @@ static void *dma_4u_alloc(struct device *dev, size_t size, first_page = (unsigned long) page_address(page); memset((char *)first_page, 0, PAGE_SIZE << order); + if (attrs & DMA_ATTR_NON_CONSISTENT) { + *dma_addrp = dma_4u_map_page(dev, page, 0, size, + DMA_BIDIRECTIONAL, 0); + if (*dma_addrp == DMA_MAPPING_ERROR) + goto out_free_page; + return page_address(page); + } + iommu = dev->archdata.iommu; iopte = alloc_npages(dev, iommu, size >> IO_PAGE_SHIFT); - - if (unlikely(iopte == NULL)) { - free_pages(first_page, order); - return NULL; - } + if (unlikely(iopte == NULL)) + goto out_free_page; *dma_addrp = (iommu->tbl.table_map_base + ((iopte - iommu->page_table) << IO_PAGE_SHIFT)); @@ -722,18 +727,26 @@ static void *dma_4u_alloc(struct device *dev, size_t size, } return ret; + +out_free_page: + free_pages(first_page, order); + return NULL; } static void dma_4u_free(struct device *dev, size_t size, void *cpu, dma_addr_t dvma, unsigned long attrs) { - struct iommu *iommu; - unsigned long order, npages; + unsigned long order; - npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; - iommu = dev->archdata.iommu; + if (attrs & DMA_ATTR_NON_CONSISTENT) { + dma_4u_unmap_page(dev, dvma, size, DMA_BIDIRECTIONAL, 0); + } else { + struct iommu *iommu = dev->archdata.iommu; - iommu_tbl_range_free(&iommu->tbl, dvma, npages, IOMMU_ERROR_CODE); + iommu_tbl_range_free(&iommu->tbl, dvma, + IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT, + IOMMU_ERROR_CODE); + } order = get_order(size); if (order < 10)