From patchwork Fri Jun 16 18:10:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 9792673 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 92B5260326 for ; Fri, 16 Jun 2017 18:13:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8E59E285DA for ; Fri, 16 Jun 2017 18:13:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8338528670; Fri, 16 Jun 2017 18:13:58 +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=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 309B32866C for ; Fri, 16 Jun 2017 18:13:58 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dLvii-0007oz-Eg; Fri, 16 Jun 2017 18:11:44 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dLvih-0007oS-T6 for xen-devel@lists.xenproject.org; Fri, 16 Jun 2017 18:11:43 +0000 Received: from [193.109.254.147] by server-6.bemta-6.messagelabs.com id 64/FB-03920-F5F14495; Fri, 16 Jun 2017 18:11:43 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrALMWRWlGSWpSXmKPExsXiaHS5VTdG3iX SYOpRDovvWyYzOTB6HP5whSWAMYo1My8pvyKBNePA5ddsBVv4Kzr+vWJuYFzN28XIxcEicIJN YvOVDhYQR0jgBKPEwd8rWLsYOTnYBFQk3jzvYQdJiAgcYpE4+eYoE0iCWUBB4te9TUBFHBzCA rYSV44Zg4RZBFQlTj+6wgxi8wroS8zf1cgOYksIyEvsarsINpNTwEDi55FtjCC2EFDNlJt3GU HmSwi0MEq0XVzBMoGRZwEjwypGjeLUorLUIl1DU72kosz0jJLcxMwcXUMDM73c1OLixPTUnMS kYr3k/NxNjEDfMwDBDsZvywIOMUpyMCmJ8r5/4hwpxJeUn1KZkVicEV9UmpNafIhRhoNDSYKX Q84lUkiwKDU9tSItMwcYhDBpCQ4eJRHe/XxAad7igsTc4sx0iNQpRl2ODavXf2ESYsnLz0uVE uc9KgtUJABSlFGaBzcCFhGXGGWlhHkZgY4S4ilILcrNLEGVf8UozsGoJMzbLQM0hSczrwRu0y ugI5iAjgi64AByREkiQkqqgXGxo8WCP++3Xc88L69/Op8tyozD4Py+C1dTgqVEu9TUrq2Pumf 29YhtrpK0u+gbdcaJ2qc3iH7befzXYqZbXuYvPvTsef9hlebX1KTfZlv/3P+0ZkXRS4djKSe2 1QvvU73te/r1s7NpaxyFToY1f/lYyq3yopjbl2XaZdYmZzZTM7VpN7vzVxspsRRnJBpqMRcVJ wIA0JXia4MCAAA= X-Env-Sender: BATV+48ca1ab4adaecdf09dc3+5045+infradead.org+hch@bombadil.s rs.infradead.org X-Msg-Ref: server-8.tower-27.messagelabs.com!1497636698!97796785!1 X-Originating-IP: [65.50.211.133] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.4.19; banners=-,-,- X-VirusChecked: Checked Received: (qmail 18721 invoked from network); 16 Jun 2017 18:11:39 -0000 Received: from bombadil.infradead.org (HELO bombadil.infradead.org) (65.50.211.133) by server-8.tower-27.messagelabs.com with AES256-GCM-SHA384 encrypted SMTP; 16 Jun 2017 18:11:39 -0000 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=nARWAjpRjMxYcpHKBe2wq5SCFOGALtwyOK7haLK2hYI=; b=ZL6HJOsE4GnPKIDfmxAPuCBMs QTomiP5SeB4dE6zYrXNrtk1MC8sKygHEwdsqFh4IUhB5QUYQbfzTpq/riqSkf2VcvfPumiMO+nMW/ ozf0gjDG38MW6CyrtzJzkbdVxVxiKME2STnM0uT3SMWtj4Lu9Mlo+xuX3xfgc87pSBZEaIneGz/lf Plb25/z3y2BD2H0JTLnDVvhQxg6tXrka0qdXpLq1RPSX53ozfBK3gRb64jHZMlbz8P8z0YBXNvNv/ sdcNJNoFbchUz17wZLDgU3kNF0/0sbb++f0s/TLH5bhI95NGiMmmQXfReNcAV+FJzwEFfNvqtQZ58 aO7ZTKwGA==; 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 1dLvia-0004kG-Em; Fri, 16 Jun 2017 18:11:37 +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 Date: Fri, 16 Jun 2017 20:10:23 +0200 Message-Id: <20170616181059.19206-9-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 Cc: linux-kernel@vger.kernel.org Subject: [Xen-devel] [PATCH 08/44] xen-swiotlb: implement ->mapping_error X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" 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 Reviewed-by: Konrad Rzeszutek Wilk --- drivers/xen/swiotlb-xen.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index a0f006daab48..c3a04b2d7532 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -67,6 +67,8 @@ static unsigned long dma_alloc_coherent_mask(struct device *dev, } #endif +#define XEN_SWIOTLB_ERROR_CODE (~(dma_addr_t)0x0) + static char *xen_io_tlb_start, *xen_io_tlb_end; static unsigned long xen_io_tlb_nslabs; /* @@ -410,7 +412,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, map = swiotlb_tbl_map_single(dev, start_dma_addr, phys, size, dir, attrs); if (map == SWIOTLB_MAP_ERROR) - return DMA_ERROR_CODE; + return XEN_SWIOTLB_ERROR_CODE; dev_addr = xen_phys_to_bus(map); xen_dma_map_page(dev, pfn_to_page(map >> PAGE_SHIFT), @@ -425,7 +427,7 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, attrs |= DMA_ATTR_SKIP_CPU_SYNC; swiotlb_tbl_unmap_single(dev, map, size, dir, attrs); - return DMA_ERROR_CODE; + return XEN_SWIOTLB_ERROR_CODE; } /* @@ -715,6 +717,11 @@ xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt, return dma_common_get_sgtable(dev, sgt, cpu_addr, handle, size); } +static int xen_swiotlb_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == XEN_SWIOTLB_ERROR_CODE; +} + const struct dma_map_ops xen_swiotlb_dma_ops = { .alloc = xen_swiotlb_alloc_coherent, .free = xen_swiotlb_free_coherent, @@ -730,4 +737,5 @@ const struct dma_map_ops xen_swiotlb_dma_ops = { .set_dma_mask = xen_swiotlb_set_dma_mask, .mmap = xen_swiotlb_dma_mmap, .get_sgtable = xen_swiotlb_get_sgtable, + .mapping_error = xen_swiotlb_mapping_error, };