From patchwork Thu Oct 4 21:27:42 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 10626809 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 64174184E for ; Thu, 4 Oct 2018 21:28:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 563502947E for ; Thu, 4 Oct 2018 21:28:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 49EA9294D3; Thu, 4 Oct 2018 21:28:25 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F11532947E for ; Thu, 4 Oct 2018 21:28:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727134AbeJEEXb (ORCPT ); Fri, 5 Oct 2018 00:23:31 -0400 Received: from ale.deltatee.com ([207.54.116.67]:52966 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725893AbeJEEXR (ORCPT ); Fri, 5 Oct 2018 00:23:17 -0400 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1g8BA2-0002Yj-PM; Thu, 04 Oct 2018 15:28:03 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.89) (envelope-from ) id 1g8B9y-0001ev-Aj; Thu, 04 Oct 2018 15:27:50 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org, linux-nvdimm@lists.01.org, linux-block@vger.kernel.org Cc: Stephen Bates , Christoph Hellwig , Keith Busch , Sagi Grimberg , Bjorn Helgaas , Jason Gunthorpe , Max Gurtovoy , Dan Williams , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Benjamin Herrenschmidt , Alex Williamson , =?utf-8?q?Christian_K=C3=B6ni?= =?utf-8?q?g?= , Jens Axboe , Logan Gunthorpe Date: Thu, 4 Oct 2018 15:27:42 -0600 Message-Id: <20181004212747.6301-9-logang@deltatee.com> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20181004212747.6301-1-logang@deltatee.com> References: <20181004212747.6301-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-nvme@lists.infradead.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org, linux-block@vger.kernel.org, sbates@raithlin.com, hch@lst.de, sagi@grimberg.me, bhelgaas@google.com, jgg@mellanox.com, maxg@mellanox.com, keith.busch@intel.com, dan.j.williams@intel.com, benh@kernel.crashing.org, jglisse@redhat.com, alex.williamson@redhat.com, christian.koenig@amd.com, axboe@kernel.dk, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v9 08/13] IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]() 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-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to use PCI P2P memory the pci_p2pmem_map_sg() function must be called to map the correct PCI bus address. To do this, check the first page in the scatter list to see if it is P2P memory or not. At the moment, scatter lists that contain P2P memory must be homogeneous so if the first page is P2P the entire SGL should be P2P. Signed-off-by: Logan Gunthorpe Reviewed-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Reviewed-by: Christoph Hellwig --- drivers/infiniband/core/rw.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/rw.c b/drivers/infiniband/core/rw.c index 683e6d11a564..d22c4a2ebac6 100644 --- a/drivers/infiniband/core/rw.c +++ b/drivers/infiniband/core/rw.c @@ -12,6 +12,7 @@ */ #include #include +#include #include #include @@ -280,7 +281,11 @@ int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num, struct ib_device *dev = qp->pd->device; int ret; - ret = ib_dma_map_sg(dev, sg, sg_cnt, dir); + if (is_pci_p2pdma_page(sg_page(sg))) + ret = pci_p2pdma_map_sg(dev->dma_device, sg, sg_cnt, dir); + else + ret = ib_dma_map_sg(dev, sg, sg_cnt, dir); + if (!ret) return -ENOMEM; sg_cnt = ret; @@ -602,7 +607,9 @@ void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u8 port_num, break; } - ib_dma_unmap_sg(qp->pd->device, sg, sg_cnt, dir); + /* P2PDMA contexts do not need to be unmapped */ + if (!is_pci_p2pdma_page(sg_page(sg))) + ib_dma_unmap_sg(qp->pd->device, sg, sg_cnt, dir); } EXPORT_SYMBOL(rdma_rw_ctx_destroy);