From patchwork Mon Mar 12 19:35:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 10277275 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E85DE603B5 for ; Mon, 12 Mar 2018 19:38:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA1E22860A for ; Mon, 12 Mar 2018 19:38:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CEE9C28B1B; Mon, 12 Mar 2018 19:38:20 +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=-6.9 required=2.0 tests=BAYES_00,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 464D42860A for ; Mon, 12 Mar 2018 19:38:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932256AbeCLThK (ORCPT ); Mon, 12 Mar 2018 15:37:10 -0400 Received: from ale.deltatee.com ([207.54.116.67]:54648 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932292AbeCLTfj (ORCPT ); Mon, 12 Mar 2018 15:35:39 -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 1evTEJ-000669-QD; Mon, 12 Mar 2018 13:35:33 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.89) (envelope-from ) id 1evTEH-0000lF-1Q; Mon, 12 Mar 2018 13:35:29 -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 , Jens Axboe , Keith Busch , Sagi Grimberg , Bjorn Helgaas , Jason Gunthorpe , Max Gurtovoy , Dan Williams , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Benjamin Herrenschmidt , Alex Williamson , Logan Gunthorpe Date: Mon, 12 Mar 2018 13:35:21 -0600 Message-Id: <20180312193525.2855-8-logang@deltatee.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180312193525.2855-1-logang@deltatee.com> References: <20180312193525.2855-1-logang@deltatee.com> 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, axboe@kernel.dk, 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, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v3 07/11] 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-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to use PCI P2P memory pci_p2pmem_[un]map_sg() functions 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 --- drivers/infiniband/core/rw.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/rw.c b/drivers/infiniband/core/rw.c index c8963e91f92a..f495e8a7f8ac 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 +607,11 @@ 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); + if (is_pci_p2pdma_page(sg_page(sg))) + pci_p2pdma_unmap_sg(qp->pd->device->dma_device, sg, + sg_cnt, dir); + else + ib_dma_unmap_sg(qp->pd->device, sg, sg_cnt, dir); } EXPORT_SYMBOL(rdma_rw_ctx_destroy);