From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42E5EC34026 for ; Tue, 18 Feb 2020 18:42:15 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 05BFF21D56 for ; Tue, 18 Feb 2020 18:42:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Nnl03IJE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 05BFF21D56 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id E8E848550D; Tue, 18 Feb 2020 18:42:14 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TvT044BcXYdu; Tue, 18 Feb 2020 18:42:14 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 67368853E6; Tue, 18 Feb 2020 18:42:14 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 61B35C1D84; Tue, 18 Feb 2020 18:42:14 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id E6CB5C013E for ; Tue, 18 Feb 2020 18:42:13 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id D58EC848AF for ; Tue, 18 Feb 2020 18:42:13 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zQD4ebnllTFB for ; Tue, 18 Feb 2020 18:42:13 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by hemlock.osuosl.org (Postfix) with ESMTPS id 6499283A94 for ; Tue, 18 Feb 2020 18:42:13 +0000 (UTC) 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; bh=jqbI93a3yxdc0ao0130GGCEXVWckV3ZL1Y/tigDybE0=; b=Nnl03IJEq5Qpcswxni7luOuStD tuO1aTfL02GJrMl0QJrVRVNdZw8xPwhBe1DBz2GsRg+jZkYBmIKR3OwEfPtBEIg4mF9lfq5yeZy64 zOfxror/NH8pW7sdFQBVJsK/hadyRMiP9IyK7fZs/o6ZVjS4PRtHu1fD5ckH0bLfcQKraIU1wQR0p K4TIIwtyMD5j4k0WZ5fnCDtfLUSPdETDnILGv8om/KHAlypLtlBlwARtnA9xKRqs/L+XgoVS9UUkb 215AnnAuevSpGvFQHXJM3nOMK1B5EGV6i4d/G+6YbNHFrBPFYyiVXfw0wY+qSPneOpZ5/LnCrk7/a e5ZwxNQA==; Received: from [199.255.44.128] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1j47ou-000390-KX; Tue, 18 Feb 2020 18:42:08 +0000 From: Christoph Hellwig To: Russell King Subject: [PATCH 3/3] ARM/dma-mapping: merge __dma_supported into arm_dma_supported Date: Tue, 18 Feb 2020 10:41:03 -0800 Message-Id: <20200218184103.35932-4-hch@lst.de> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200218184103.35932-1-hch@lst.de> References: <20200218184103.35932-1-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 Cc: linux-kernel@vger.kernel.org, Peter Ujfalusi , iommu@lists.linux-foundation.org, Robin Murphy , linux-arm-kernel@lists.infradead.org, Roger Quadros X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Merge __dma_supported into its only caller, and move the resulting function so that it doesn't need a forward declaration. Also mark it static as there are no callers outside of dma-mapping.c. Signed-off-by: Christoph Hellwig --- arch/arm/include/asm/dma-iommu.h | 2 -- arch/arm/mm/dma-mapping.c | 41 +++++++++++++------------------- 2 files changed, 17 insertions(+), 26 deletions(-) diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h index 772f48ef84b7..86405cc81385 100644 --- a/arch/arm/include/asm/dma-iommu.h +++ b/arch/arm/include/asm/dma-iommu.h @@ -33,7 +33,5 @@ int arm_iommu_attach_device(struct device *dev, struct dma_iommu_mapping *mapping); void arm_iommu_detach_device(struct device *dev); -int arm_dma_supported(struct device *dev, u64 mask); - #endif /* __KERNEL__ */ #endif diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 87aba505554a..8a8949174b1c 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -179,6 +179,23 @@ static void arm_dma_sync_single_for_device(struct device *dev, __dma_page_cpu_to_dev(page, offset, size, dir); } +/* + * Return whether the given device DMA address mask can be supported + * properly. For example, if your device can only drive the low 24-bits + * during bus mastering, then you would pass 0x00ffffff as the mask + * to this function. + */ +static int arm_dma_supported(struct device *dev, u64 mask) +{ + unsigned long max_dma_pfn = min(max_pfn - 1, arm_dma_pfn_limit); + + /* + * Translate the device's DMA mask to a PFN limit. This + * PFN number includes the page which we can DMA to. + */ + return dma_to_pfn(dev, mask) >= max_dma_pfn; +} + const struct dma_map_ops arm_dma_ops = { .alloc = arm_dma_alloc, .free = arm_dma_free, @@ -219,19 +236,6 @@ const struct dma_map_ops arm_coherent_dma_ops = { }; EXPORT_SYMBOL(arm_coherent_dma_ops); -static int __dma_supported(struct device *dev, u64 mask) -{ - unsigned long max_dma_pfn = min(max_pfn - 1, arm_dma_pfn_limit); - - /* - * Translate the device's DMA mask to a PFN limit. This - * PFN number includes the page which we can DMA to. - */ - if (dma_to_pfn(dev, mask) < max_dma_pfn) - return 0; - return 1; -} - static void __dma_clear_buffer(struct page *page, size_t size, int coherent_flag) { /* @@ -1054,17 +1058,6 @@ void arm_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, dir); } -/* - * Return whether the given device DMA address mask can be supported - * properly. For example, if your device can only drive the low 24-bits - * during bus mastering, then you would pass 0x00ffffff as the mask - * to this function. - */ -int arm_dma_supported(struct device *dev, u64 mask) -{ - return __dma_supported(dev, mask); -} - static const struct dma_map_ops *arm_get_dma_map_ops(bool coherent) { /* -- 2.24.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu