From patchwork Sat Dec 8 17:36:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10719571 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 9B53B112E for ; Sat, 8 Dec 2018 17:37:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8030D2AB65 for ; Sat, 8 Dec 2018 17:37:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 73E682AE27; Sat, 8 Dec 2018 17:37:25 +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 0905A2AB65 for ; Sat, 8 Dec 2018 17:37:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726280AbeLHRhX (ORCPT ); Sat, 8 Dec 2018 12:37:23 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:42962 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726223AbeLHRhT (ORCPT ); Sat, 8 Dec 2018 12:37:19 -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=7kqMcnLmVFeoQnDMxocbVrlIY+4jeZ6Ab2fif+he9Kc=; b=npUsXCuskLDtFMp0w2shACalwT /fgAocw/TueSdjampu6EVtyIUz+MLHez0vD5vk70Vt8MUtoS1zr7hrBV9U6QsSh9HC88XLS9dFKMF Z8EwyqaRvuWqccuVsaGRG2uQmvSzdJxLZj7cjzFPo2WuEKEu9Iehzh1vhzvZMP2+XXt8k3A9a8fAC eXL7a2hWUvPl+bxEs2xbn4kZOYLaX2HixePRo/yZut4dVVejiPCWk/sosA/HLeB4O2Wv9mITfOgaI U9cmQJlecV756RNOiR44BkQHtSEh1rO4bu3a7izFQ6/2eUmOyo2aEBZp8z0dIQaJXY3mvgiPW8nGS 7FG/XBLg==; Received: from [184.48.100.57] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVgXI-00054C-KO; Sat, 08 Dec 2018 17:37:04 +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 05/10] sparc64/iommu: move code around a bit Date: Sat, 8 Dec 2018 09:36:57 -0800 Message-Id: <20181208173702.15158-6-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 Move the alloc / free routines down the file so that we can easily use the map / unmap helpers to implement non-consistent allocations. Also drop the _coherent postfix to match the method name. Signed-off-by: Christoph Hellwig Acked-by: David S. Miller --- arch/sparc/kernel/iommu.c | 135 +++++++++++++++++++------------------- 1 file changed, 67 insertions(+), 68 deletions(-) diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c index 0626bae5e3da..4bf0497e0704 100644 --- a/arch/sparc/kernel/iommu.c +++ b/arch/sparc/kernel/iommu.c @@ -195,72 +195,6 @@ static inline void iommu_free_ctx(struct iommu *iommu, int ctx) } } -static void *dma_4u_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_addrp, gfp_t gfp, - unsigned long attrs) -{ - unsigned long order, first_page; - struct iommu *iommu; - struct page *page; - int npages, nid; - iopte_t *iopte; - void *ret; - - size = IO_PAGE_ALIGN(size); - order = get_order(size); - if (order >= 10) - return NULL; - - nid = dev->archdata.numa_node; - page = alloc_pages_node(nid, gfp, order); - if (unlikely(!page)) - return NULL; - - first_page = (unsigned long) page_address(page); - memset((char *)first_page, 0, PAGE_SIZE << order); - - iommu = dev->archdata.iommu; - - iopte = alloc_npages(dev, iommu, size >> IO_PAGE_SHIFT); - - if (unlikely(iopte == NULL)) { - free_pages(first_page, order); - return NULL; - } - - *dma_addrp = (iommu->tbl.table_map_base + - ((iopte - iommu->page_table) << IO_PAGE_SHIFT)); - ret = (void *) first_page; - npages = size >> IO_PAGE_SHIFT; - first_page = __pa(first_page); - while (npages--) { - iopte_val(*iopte) = (IOPTE_CONSISTENT(0UL) | - IOPTE_WRITE | - (first_page & IOPTE_PAGE)); - iopte++; - first_page += IO_PAGE_SIZE; - } - - return ret; -} - -static void dma_4u_free_coherent(struct device *dev, size_t size, - void *cpu, dma_addr_t dvma, - unsigned long attrs) -{ - struct iommu *iommu; - unsigned long order, npages; - - npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; - iommu = dev->archdata.iommu; - - iommu_tbl_range_free(&iommu->tbl, dvma, npages, IOMMU_ERROR_CODE); - - order = get_order(size); - if (order < 10) - free_pages((unsigned long)cpu, order); -} - static dma_addr_t dma_4u_map_page(struct device *dev, struct page *page, unsigned long offset, size_t sz, enum dma_data_direction direction, @@ -742,6 +676,71 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev, spin_unlock_irqrestore(&iommu->lock, flags); } +static void *dma_4u_alloc(struct device *dev, size_t size, + dma_addr_t *dma_addrp, gfp_t gfp, unsigned long attrs) +{ + unsigned long order, first_page; + struct iommu *iommu; + struct page *page; + int npages, nid; + iopte_t *iopte; + void *ret; + + size = IO_PAGE_ALIGN(size); + order = get_order(size); + if (order >= 10) + return NULL; + + nid = dev->archdata.numa_node; + page = alloc_pages_node(nid, gfp, order); + if (unlikely(!page)) + return NULL; + + first_page = (unsigned long) page_address(page); + memset((char *)first_page, 0, PAGE_SIZE << order); + + iommu = dev->archdata.iommu; + + iopte = alloc_npages(dev, iommu, size >> IO_PAGE_SHIFT); + + if (unlikely(iopte == NULL)) { + free_pages(first_page, order); + return NULL; + } + + *dma_addrp = (iommu->tbl.table_map_base + + ((iopte - iommu->page_table) << IO_PAGE_SHIFT)); + ret = (void *) first_page; + npages = size >> IO_PAGE_SHIFT; + first_page = __pa(first_page); + while (npages--) { + iopte_val(*iopte) = (IOPTE_CONSISTENT(0UL) | + IOPTE_WRITE | + (first_page & IOPTE_PAGE)); + iopte++; + first_page += IO_PAGE_SIZE; + } + + return ret; +} + +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; + + npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; + iommu = dev->archdata.iommu; + + iommu_tbl_range_free(&iommu->tbl, dvma, npages, IOMMU_ERROR_CODE); + + order = get_order(size); + if (order < 10) + free_pages((unsigned long)cpu, order); +} + + static int dma_4u_supported(struct device *dev, u64 device_mask) { struct iommu *iommu = dev->archdata.iommu; @@ -758,8 +757,8 @@ static int dma_4u_supported(struct device *dev, u64 device_mask) } static const struct dma_map_ops sun4u_dma_ops = { - .alloc = dma_4u_alloc_coherent, - .free = dma_4u_free_coherent, + .alloc = dma_4u_alloc, + .free = dma_4u_free, .map_page = dma_4u_map_page, .unmap_page = dma_4u_unmap_page, .map_sg = dma_4u_map_sg,