From patchwork Thu Mar 11 23:31:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 12133315 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 EEB27C28E88 for ; Thu, 11 Mar 2021 23:49:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DEB9E64F92 for ; Thu, 11 Mar 2021 23:49:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231398AbhCKXtE (ORCPT ); Thu, 11 Mar 2021 18:49:04 -0500 Received: from ale.deltatee.com ([204.191.154.188]:59150 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231282AbhCKXs5 (ORCPT ); Thu, 11 Mar 2021 18:48:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:MIME-Version:References:In-Reply-To: Message-Id:Date:Cc:To:From:content-disposition; bh=RWXwANJSi1YHE9SXh/vkrbb+LuWGD2o8fdtHIWP0im0=; b=Il/909HX1ReIjuH/DQQRUWCbGJ rwqplq8j7zCFjrGAFApqpwgRF0WhSKa9dp79xbHuG02pdcKARnuTLWP8goViDVydS9Ev8lyIlPv+v FWWJIDnnyUqnBSoUN04RvsjWs4OiwrwcMQ/jN0KFAnN4q4YB0a/DHhu/OFHMBrYafzzhePOaTJx8n 2ttD1xTgCwB4llOsN1PhW9D9Lo8U3/AVemwfu3FBTgqS+hyTD65gStZo+XmcrTIKv3Z7PLjhOCfAu sC6+8+PT545jn/sNo86PM5hWX1sYA+iztBB/qyFL2L83oj5ucCaODvzgnGwZIjG/qNX+9ZIi+hIoR ZYvSGKuw==; Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lKUmc-0003ev-TB; Thu, 11 Mar 2021 16:31:59 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1lKUmX-00024q-BH; Thu, 11 Mar 2021 16:31:53 -0700 From: Logan Gunthorpe To: 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 Cc: Stephen Bates , Christoph Hellwig , Dan Williams , Jason Gunthorpe , =?utf-8?q?Christian_K=C3=B6nig?= , Ira Weiny , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Logan Gunthorpe Date: Thu, 11 Mar 2021 16:31:41 -0700 Message-Id: <20210311233142.7900-12-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210311233142.7900-1-logang@deltatee.com> References: <20210311233142.7900-1-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-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, sbates@raithlin.com, hch@lst.de, jgg@ziepe.ca, christian.koenig@amd.com, jhubbard@nvidia.com, ddutile@redhat.com, willy@infradead.org, daniel.vetter@ffwll.ch, jason@jlekstrand.net, dave.hansen@linux.intel.com, dan.j.williams@intel.com, iweiny@intel.com, andrzej.jakowski@intel.com, dave.b.minturn@intel.com, jianxin.xiong@intel.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [RFC PATCH v2 11/11] nvme-pci: Convert to using dma_map_sg for p2pdma pages X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Convert to using dma_[un]map_sg() for PCI p2pdma pages. This should be equivalent, though support will be somewhat less (only dma-direct and dma-iommu are currently supported). Signed-off-by: Logan Gunthorpe --- drivers/nvme/host/pci.c | 27 +++++++-------------------- 1 file changed, 7 insertions(+), 20 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 7d40c6a9e58e..89ca5acf7a62 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -577,17 +577,6 @@ static void nvme_free_sgls(struct nvme_dev *dev, struct request *req) } -static void nvme_unmap_sg(struct nvme_dev *dev, struct request *req) -{ - struct nvme_iod *iod = blk_mq_rq_to_pdu(req); - - if (is_pci_p2pdma_page(sg_page(iod->sg))) - pci_p2pdma_unmap_sg(dev->dev, iod->sg, iod->nents, - rq_dma_dir(req)); - else - dma_unmap_sg(dev->dev, iod->sg, iod->nents, rq_dma_dir(req)); -} - static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) { struct nvme_iod *iod = blk_mq_rq_to_pdu(req); @@ -600,7 +589,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct request *req) WARN_ON_ONCE(!iod->nents); - nvme_unmap_sg(dev, req); + dma_unmap_sg(dev->dev, iod->sg, iod->nents, rq_dma_dir(req)); if (iod->npages == 0) dma_pool_free(dev->prp_small_pool, nvme_pci_iod_list(req)[0], iod->first_dma); @@ -868,13 +857,11 @@ static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req, if (!iod->nents) goto out_free_sg; - if (is_pci_p2pdma_page(sg_page(iod->sg))) - nr_mapped = pci_p2pdma_map_sg_attrs(dev->dev, iod->sg, - iod->nents, rq_dma_dir(req), DMA_ATTR_NO_WARN); - else - nr_mapped = dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, - rq_dma_dir(req), DMA_ATTR_NO_WARN); - if (!nr_mapped) + nr_mapped = dma_map_sg_attrs(dev->dev, iod->sg, iod->nents, + rq_dma_dir(req), DMA_ATTR_NO_WARN); + if (nr_mapped < 0) + ret = BLK_STS_P2PDMA; + if (nr_mapped <= 0) goto out_free_sg; iod->use_sgl = nvme_pci_use_sgls(dev, req); @@ -887,7 +874,7 @@ static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req, return BLK_STS_OK; out_unmap_sg: - nvme_unmap_sg(dev, req); + dma_unmap_sg(dev->dev, iod->sg, iod->nents, rq_dma_dir(req)); out_free_sg: mempool_free(iod->sg, dev->iod_mempool); return ret;