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=-7.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable 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 99A04C76194 for ; Tue, 23 Jul 2019 16:58:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7D3D0223BA for ; Tue, 23 Jul 2019 16:58:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730959AbfGWQ64 (ORCPT ); Tue, 23 Jul 2019 12:58:56 -0400 Received: from ale.deltatee.com ([207.54.116.67]:50466 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730940AbfGWQ64 (ORCPT ); Tue, 23 Jul 2019 12:58:56 -0400 Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtp (Exim 4.89) (envelope-from ) id 1hpy7e-0003Tj-UQ; Tue, 23 Jul 2019 10:58:43 -0600 To: "Koenig, Christian" , "linux-kernel@vger.kernel.org" , "linux-pci@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "linux-rdma@vger.kernel.org" Cc: Bjorn Helgaas , Christoph Hellwig , Jason Gunthorpe , Sagi Grimberg , Keith Busch , Jens Axboe , Dan Williams , Eric Pilmore , Stephen Bates References: <20190722230859.5436-1-logang@deltatee.com> From: Logan Gunthorpe Message-ID: Date: Tue, 23 Jul 2019 10:58:41 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: sbates@raithlin.com, epilmore@gigaio.com, dan.j.williams@intel.com, axboe@fb.com, kbusch@kernel.org, sagi@grimberg.me, jgg@mellanox.com, hch@lst.de, bhelgaas@google.com, linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Christian.Koenig@amd.com X-SA-Exim-Mail-From: logang@deltatee.com Subject: Re: [PATCH 00/14] PCI/P2PDMA: Support transactions that hit the host bridge X-SA-Exim-Version: 4.2.1 (built Tue, 02 Aug 2016 21:08:31 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On 2019-07-23 10:30 a.m., Koenig, Christian wrote: > Am 23.07.19 um 01:08 schrieb Logan Gunthorpe: >> As discussed on the list previously, in order to fully support the >> whitelist Christian added with the IOMMU, we must ensure that we >> map any buffer going through the IOMMU with an aprropriate dma_map >> call. This patchset accomplishes this by cleaning up the output of >> upstream_bridge_distance() to better indicate the mapping requirements, >> caching these requirements in an xarray, then looking them up at map >> time and applying the appropriate mapping method. >> >> After this patchset, it's possible to use the NVMe-of P2P support to >> transfer between devices without a switch on the whitelisted root >> complexes. A couple Intel device I have tested this on have also >> been added to the white list. >> >> Most of the changes are contained within the p2pdma.c, but there are >> a few minor touches to other subsystems, mostly to add support >> to call an unmap function. >> >> The final patch in this series demonstrates a possible >> pci_p2pdma_map_resource() function that I expect Christian will need >> but does not have any users at this time so I don't intend for it to be >> considered for merging. >> >> This patchset is based on 5.3-rc1 and a git branch is available here: >> >> https://github.com/sbates130272/linux-p2pmem/ p2pdma_rc_map_v1 > > I reviewed patches #1-#3 and #14. > > Feel free to stick an Acked-by: Christian König > to the rest, but I'm not really deep into the > NVMe P2P handling here. Thanks! Logan