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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 54078C433DB for ; Tue, 16 Mar 2021 08:15:58 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A630F64FD6 for ; Tue, 16 Mar 2021 08:15:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A630F64FD6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 25B976B006E; Tue, 16 Mar 2021 04:15:57 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2321A6B0071; Tue, 16 Mar 2021 04:15:57 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 10D0E6B0072; Tue, 16 Mar 2021 04:15:57 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0220.hostedemail.com [216.40.44.220]) by kanga.kvack.org (Postfix) with ESMTP id E6D686B006E for ; Tue, 16 Mar 2021 04:15:56 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id A26AD180AD822 for ; Tue, 16 Mar 2021 08:15:56 +0000 (UTC) X-FDA: 77925029112.26.C38A70F Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf28.hostedemail.com (Postfix) with ESMTP id 3328C2000385 for ; Tue, 16 Mar 2021 08:15:56 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 6154568C4E; Tue, 16 Mar 2021 09:15:54 +0100 (CET) Date: Tue, 16 Mar 2021 09:15:53 +0100 From: Christoph Hellwig To: Logan Gunthorpe Cc: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Stephen Bates , Christoph Hellwig , Dan Williams , Jason Gunthorpe , Christian =?iso-8859-1?Q?K=F6nig?= , Ira Weiny , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin Subject: Re: [RFC PATCH v2 07/11] dma-mapping: Add flags to dma_map_ops to indicate PCI P2PDMA support Message-ID: <20210316081553.GC16595@lst.de> References: <20210311233142.7900-1-logang@deltatee.com> <20210311233142.7900-8-logang@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210311233142.7900-8-logang@deltatee.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Stat-Signature: 9ciky9571pfbc8nub75npgoatdmdirm4 X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 3328C2000385 Received-SPF: none (lst.de>: No applicable sender policy available) receiver=imf28; identity=mailfrom; envelope-from=""; helo=verein.lst.de; client-ip=213.95.11.211 X-HE-DKIM-Result: none/none X-HE-Tag: 1615882556-733427 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Mar 11, 2021 at 04:31:37PM -0700, Logan Gunthorpe wrote: > +int dma_pci_p2pdma_supported(struct device *dev) > +{ > + const struct dma_map_ops *ops = get_dma_ops(dev); > + > + return !ops || ops->flags & DMA_F_PCI_P2PDMA_SUPPORTED; > +} > +EXPORT_SYMBOL(dma_pci_p2pdma_supported); EXPORT_SYMBOL_GPL like all new DMA APIs.