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Tue, 28 Sep 2021 12:11:10 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1mVIVR-007Fxh-2M; Tue, 28 Sep 2021 16:11:09 -0300 Date: Tue, 28 Sep 2021 16:11:09 -0300 From: Jason Gunthorpe 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 , Christian =?utf-8?B?S8O2bmln?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy , Martin Oliveira , Chaitanya Kulkarni Subject: Re: [PATCH v3 07/20] dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support Message-ID: <20210928191109.GO3544071@ziepe.ca> References: <20210916234100.122368-1-logang@deltatee.com> <20210916234100.122368-8-logang@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210916234100.122368-8-logang@deltatee.com> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 39AF710340B9 X-Stat-Signature: 46wm4syoji35akrsfgohbwotjbwo8ycg Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=ziepe.ca header.s=google header.b=NIsddmzY; spf=pass (imf13.hostedemail.com: domain of jgg@ziepe.ca designates 209.85.166.52 as permitted sender) smtp.mailfrom=jgg@ziepe.ca; dmarc=none X-HE-Tag: 1632856271-482630 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, Sep 16, 2021 at 05:40:47PM -0600, Logan Gunthorpe wrote: > Add a flags member to the dma_map_ops structure with one flag to > indicate support for PCI P2PDMA. > > Also, add a helper to check if a device supports PCI P2PDMA. > > Signed-off-by: Logan Gunthorpe > --- > include/linux/dma-map-ops.h | 10 ++++++++++ > include/linux/dma-mapping.h | 5 +++++ > kernel/dma/mapping.c | 18 ++++++++++++++++++ > 3 files changed, 33 insertions(+) Reviewed-by: Jason Gunthorpe Jason