From patchwork Sat Dec 8 17:37:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10719623 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 217745C90 for ; Sat, 8 Dec 2018 17:37:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 073E22AB65 for ; Sat, 8 Dec 2018 17:37:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EFA7B2AFA1; Sat, 8 Dec 2018 17:37:34 +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 87FE32AF94 for ; Sat, 8 Dec 2018 17:37:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726231AbeLHRhT (ORCPT ); Sat, 8 Dec 2018 12:37:19 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:42958 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726189AbeLHRhS (ORCPT ); Sat, 8 Dec 2018 12:37:18 -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=itmW2VTZOd8rUAhTAA5rXh48hRuTxgk6doJ5rJPhYhw=; b=jcwyDbqRd5uJfegfK33I29M4qZ QJc+UC8+Ial6xQVasjjhwQ1tRtP0BmxeQEqhywdDfH3cd4OH/CQ/7JU9DWLtPZR5IEl4kSA2kCzo3 Lzfvez+RGSIyuvbCdUF6j2sXnSFkAb6JzRy8SeuoYakaPKHe9MPI38WGmSHQAlEcQ7ErbfCapSB+H dWbvXWBLED/oQs/FZ31Y4Jg9uTdPn2sUnDWuNMp+y7n+lnn7XhbnrksK2CucqDuX/YYvdWwuY3dpG 7iPrAweJ4mJg11h/4EPW33ciDSfaVgNOsA4u7RK+Ul63Um/nT463wGQhjcHf+HGNtZElW6NmJPCPW xF8pkExA==; Received: from [184.48.100.57] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVgXJ-00054P-RK; 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 08/10] sparc64/pci_sun4v: implement DMA_ATTR_NON_CONSISTENT Date: Sat, 8 Dec 2018 09:37:00 -0800 Message-Id: <20181208173702.15158-9-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/pci_sun4v.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index b95c70136559..24a76ecf2986 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -590,6 +590,14 @@ static void *dma_4v_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_4v_map_page(dev, page, 0, size, + DMA_BIDIRECTIONAL, 0); + if (*dma_addrp == DMA_MAPPING_ERROR) + goto range_alloc_fail; + return page_address(page); + } + iommu = dev->archdata.iommu; atu = iommu->atu; @@ -649,6 +657,11 @@ static void dma_4v_free(struct device *dev, size_t size, void *cpu, unsigned long iotsb_num; u32 devhandle; + if (attrs & DMA_ATTR_NON_CONSISTENT) { + dma_4v_unmap_page(dev, dvma, size, DMA_BIDIRECTIONAL, 0); + goto free_pages; + } + npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; iommu = dev->archdata.iommu; pbm = dev->archdata.host_controller; @@ -665,6 +678,7 @@ static void dma_4v_free(struct device *dev, size_t size, void *cpu, entry = ((dvma - tbl->table_map_base) >> IO_PAGE_SHIFT); dma_4v_iommu_demap(dev, devhandle, dvma, iotsb_num, entry, npages); iommu_tbl_range_free(tbl, dvma, npages, IOMMU_ERROR_CODE); +free_pages: order = get_order(size); if (order < 10) free_pages((unsigned long)cpu, order);