From patchwork Wed Feb 13 18:29:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10810667 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 9A41413A4 for ; Wed, 13 Feb 2019 18:33:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 874B42DB84 for ; Wed, 13 Feb 2019 18:33:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 790E32DCA5; Wed, 13 Feb 2019 18:33:06 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1C43D2DB84 for ; Wed, 13 Feb 2019 18:33:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Elm7F89nt/5gjuRyObuV3SEHHynIlyOJ1f9UlfUJhcQ=; b=Obm64RudN/6+ji f9YipBT3UjQl3EuMRM7IQ1jBH4sF0E4bS9z3pEncv8KQC8iU5rYAYMyCv/Fa4N03IyRVxYz9L0X/u FT1/Ja/VE++j+QPguCRUv5AbHQOmuv5UJPoHIU5pDz2K6xNQNvWaJ4mlNHcDrW/AnAO5JOvr3yeCo zj0wUEih16ugpWkLmTYdmKECoV2/QQ7j23aWm+NkEKA6upM2vABAUBq7uUuPKTUIuQUPujRNJpNuq NN4vcfulSRdTd8AiQJc2ozTlsoSq0qxULdYrAYKaq63tRdICdhvteTQgGCLU4UjO8neOIPF9gL08R lR3xp/ZAdm64m1aw25rg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtzLC-0005QT-HA; Wed, 13 Feb 2019 18:33:02 +0000 Received: from 089144210182.atnat0019.highway.a1.net ([89.144.210.182] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtzIJ-0000Jw-TW; Wed, 13 Feb 2019 18:30:04 +0000 From: Christoph Hellwig To: Robin Murphy Subject: [PATCH 16/21] dma-iommu: factor contiguous remapped allocations into helpers Date: Wed, 13 Feb 2019 19:29:15 +0100 Message-Id: <20190213182920.16764-17-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190213182920.16764-1-hch@lst.de> References: <20190213182920.16764-1-hch@lst.de> MIME-Version: 1.0 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tom Lendacky , Catalin Marinas , Joerg Roedel , Will Deacon , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This moves the last remaning non-dispatch code out of iommu_dma_alloc, preparing to refactor the allocation method selection. Signed-off-by: Christoph Hellwig --- drivers/iommu/dma-iommu.c | 48 +++++++++++++++++++++++---------------- 1 file changed, 29 insertions(+), 19 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 3199c9c81294..5a7ca5271532 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -675,6 +675,29 @@ static void *iommu_dma_alloc_remap(struct device *dev, size_t size, return NULL; } +static void *iommu_dma_alloc_contiguous_remap(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) +{ + pgprot_t prot = arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs); + struct page *page; + void *addr; + + addr = iommu_dma_alloc_contiguous(dev, size, dma_handle, gfp, attrs); + if (!addr) + return NULL; + + page = virt_to_page(addr); + addr = dma_common_contiguous_remap(page, PAGE_ALIGN(size), VM_USERMAP, + prot, __builtin_return_address(0)); + if (!addr) + goto out_free; + arch_dma_prep_coherent(page, size); + return addr; +out_free: + iommu_dma_free_contiguous(dev, size, page, *dma_handle); + return NULL; +} + /** * iommu_dma_mmap_remap - Map a remapped page array into provided user VMA * @cpu_addr: virtual address of the memory to be remapped @@ -1024,8 +1047,6 @@ static void *iommu_dma_alloc(struct device *dev, size_t size, size_t iosize = size; void *addr; - size = PAGE_ALIGN(size); - /* * Some drivers rely on this, and we probably don't want the * possibility of stale kernel data being read by devices anyway. @@ -1044,23 +1065,12 @@ static void *iommu_dma_alloc(struct device *dev, size_t size, return iommu_dma_alloc_contiguous(dev, iosize, handle, gfp, attrs); } else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) { - pgprot_t prot = arch_dma_mmap_pgprot(dev, PAGE_KERNEL, attrs); - struct page *page; - - addr = iommu_dma_alloc_contiguous(dev, iosize, handle, gfp, - attrs); - if (coherent || !addr) - return addr; - - page = virt_to_page(addr); - addr = dma_common_contiguous_remap(page, size, VM_USERMAP, prot, - __builtin_return_address(0)); - if (!addr) { - iommu_dma_free_contiguous(dev, iosize, page, *handle); - return NULL; - } - - arch_dma_prep_coherent(page, iosize); + if (coherent) + addr = iommu_dma_alloc_contiguous(dev, iosize, handle, + gfp, attrs); + else + addr = iommu_dma_alloc_contiguous_remap(dev, iosize, + handle, gfp, attrs); } else { addr = iommu_dma_alloc_remap(dev, iosize, handle, gfp, attrs); }