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 Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BF880C433EF for ; Wed, 29 Jun 2022 06:42:42 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 665D0400A6; Wed, 29 Jun 2022 06:42:42 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 665D0400A6 X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UrbTwlCw1-1n; Wed, 29 Jun 2022 06:42:41 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTPS id 3ADCF40AB7; Wed, 29 Jun 2022 06:42:41 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 3ADCF40AB7 Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 12CBEC0032; Wed, 29 Jun 2022 06:42:41 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1A5CDC002D for ; Wed, 29 Jun 2022 06:42:40 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id E966C80D20 for ; Wed, 29 Jun 2022 06:42:39 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org E966C80D20 X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id M_1ibri1xOqt for ; Wed, 29 Jun 2022 06:42:39 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org 504D480314 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp1.osuosl.org (Postfix) with ESMTPS id 504D480314 for ; Wed, 29 Jun 2022 06:42:39 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 2864567373; Wed, 29 Jun 2022 08:42:36 +0200 (CEST) Date: Wed, 29 Jun 2022 08:42:35 +0200 From: Christoph Hellwig To: Logan Gunthorpe Subject: Re: [PATCH v7 11/21] RDMA/core: introduce ib_dma_pci_p2p_dma_supported() Message-ID: <20220629064235.GK17234@lst.de> References: <20220615161233.17527-1-logang@deltatee.com> <20220615161233.17527-12-logang@deltatee.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220615161233.17527-12-logang@deltatee.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: linux-pci@vger.kernel.org, Dave Hansen , linux-nvme@lists.infradead.org, Stephen Bates , linux-mm@kvack.org, Jason Ekstrand , Ira Weiny , Christoph Hellwig , Minturn Dave B , Martin Oliveira , Matthew Wilcox , Jason Gunthorpe , Chaitanya Kulkarni , Bjorn Helgaas , Jason Gunthorpe , Daniel Vetter , Ralph Campbell , John Hubbard , linux-block@vger.kernel.org, Dan Williams , Xiong Jianxin , Max Gurtovoy , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Robin Murphy , Christian =?iso-8859-1?Q?K=F6nig?= 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" On Wed, Jun 15, 2022 at 10:12:23AM -0600, Logan Gunthorpe wrote: > Introduce the helper function ib_dma_pci_p2p_dma_supported() to check > if a given ib_device can be used in P2PDMA transfers. This ensures > the ib_device is not using virt_dma and also that the underlying > dma_device supports P2PDMA. > > Use the new helper in nvme-rdma to replace the existing check for > ib_uses_virt_dma(). Adding the dma_pci_p2pdma_supported() check allows > switching away from pci_p2pdma_[un]map_sg(). > > Signed-off-by: Logan Gunthorpe > Reviewed-by: Jason Gunthorpe > Reviewed-by: Max Gurtovoy Looks good: Reviewed-by: Christoph Hellwig _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu