From patchwork Fri Jun 16 18:10:37 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9793005 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6497B60231 for ; Fri, 16 Jun 2017 18:21:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5F69C2865B for ; Fri, 16 Jun 2017 18:21:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 541FF2866C; Fri, 16 Jun 2017 18:21:40 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham 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 F08522865B for ; Fri, 16 Jun 2017 18:21:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753248AbdFPSVT (ORCPT ); Fri, 16 Jun 2017 14:21:19 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:47040 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753113AbdFPSMj (ORCPT ); Fri, 16 Jun 2017 14:12:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=0wrZqfiUxzIjsMIP+kvG0ZcUFokN2jOk2GMWGR62hvY=; b=gjBZoOu1o2XzVRZle7bXB8VnI i0OdWBByEcroHR/YUF8RbuUOtZlYwWAhCXJLTDbjX8eCe3HY38UEBVl9KF+ZbCKNtbd05LWM6Yhhc fxuQTQ4RS9h06pDua5u1/pXxpgPAZ/Pb2n3hqScCvA8hl3++VjVZRgJcJhofdDAcOljyrKpRK8BF+ eTKS2AXqUpRuPr+RaxiIOllK4h67EdV71fDYdbjJOVHy5Vql7U5HVmYKuz+/Gyv4mgs/yLXV0a00P U+2HxYTlKSdMvpmeO1VlonCvLvX9ZUNnD5GBQDmGwitiRXbHVWJ5XPetQNTaVAlLR9D6cLzq/Mqh/ WqV26c1Vw==; Received: from clnet-p099-196.ikbnet.co.at ([83.175.99.196] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat Linux)) id 1dLvjM-0005gN-D1; Fri, 16 Jun 2017 18:12:25 +0000 From: Christoph Hellwig To: x86@kernel.org, linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@linux-mips.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, iommu@lists.linux-foundation.org, netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 22/44] x86/pci-nommu: implement ->mapping_error Date: Fri, 16 Jun 2017 20:10:37 +0200 Message-Id: <20170616181059.19206-23-hch@lst.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170616181059.19206-1-hch@lst.de> References: <20170616181059.19206-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP DMA_ERROR_CODE is going to go away, so don't rely on it. Signed-off-by: Christoph Hellwig --- arch/x86/kernel/pci-nommu.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c index a88952ef371c..085fe6ce4049 100644 --- a/arch/x86/kernel/pci-nommu.c +++ b/arch/x86/kernel/pci-nommu.c @@ -11,6 +11,8 @@ #include #include +#define NOMMU_MAPPING_ERROR 0 + static int check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size) { @@ -33,7 +35,7 @@ static dma_addr_t nommu_map_page(struct device *dev, struct page *page, dma_addr_t bus = page_to_phys(page) + offset; WARN_ON(size == 0); if (!check_addr("map_single", dev, bus, size)) - return DMA_ERROR_CODE; + return NOMMU_MAPPING_ERROR; flush_write_buffers(); return bus; } @@ -88,6 +90,11 @@ static void nommu_sync_sg_for_device(struct device *dev, flush_write_buffers(); } +static int nommu_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == NOMMU_MAPPING_ERROR; +} + const struct dma_map_ops nommu_dma_ops = { .alloc = dma_generic_alloc_coherent, .free = dma_generic_free_coherent, @@ -96,4 +103,5 @@ const struct dma_map_ops nommu_dma_ops = { .sync_single_for_device = nommu_sync_single_for_device, .sync_sg_for_device = nommu_sync_sg_for_device, .is_phys = 1, + .mapping_error = nommu_mapping_error, };