From patchwork Fri Nov 6 17:00:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11887539 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=-12.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 0EF4DC55178 for ; Fri, 6 Nov 2020 17:01:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC620217A0 for ; Fri, 6 Nov 2020 17:01:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b="VWwcxWwP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727674AbgKFRBX (ORCPT ); Fri, 6 Nov 2020 12:01:23 -0500 Received: from ale.deltatee.com ([204.191.154.188]:57790 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727499AbgKFRBD (ORCPT ); Fri, 6 Nov 2020 12:01:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=3wtYAi0StI8nd0I1iePTfTtLTxyZ466aPXeo9Bi8PoQ=; b=VWwcxWwP1IDqGr3/kp969leU1z KFRMv/I9ZyQc6PxdptG26nWupvfqehgZ3fs2A3CyvFTZC3xjQ5s1akXGEjn3bg8cqNRC2fPonKSA5 s/btudX7LX5JYJShE0vMCz0nIgJFhcF5pRyYqxgdrxA1Nz6RLoCN3TxGy+b7RSyB8r4dpFEHBR9cl wSeQClNu5Dyd2TGv/OIVFb25TcsfV5DIE5ngFXj3JRIgnTf5xQnA8Nsg+ClwtHkA2WKVN6zPNi07A QLKu6BeAvrXWSGj6sRoiIff60TUjTFD8COo0gRJHeIj8780DdDsRqS1CNOHftC6AGsaQJllSEmfLD HrGas1Jg==; 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 1kb56h-0002PY-Qv; Fri, 06 Nov 2020 10:01:01 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.92) (envelope-from ) id 1kb56V-0004tB-17; Fri, 06 Nov 2020 10:00:47 -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 , Logan Gunthorpe Date: Fri, 6 Nov 2020 10:00:29 -0700 Message-Id: <20201106170036.18713-9-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201106170036.18713-1-logang@deltatee.com> References: <20201106170036.18713-1-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, dan.j.williams@intel.com, iweiny@intel.com, jhubbard@nvidia.com, ddutile@redhat.com, willy@infradead.org, daniel.vetter@ffwll.ch, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [RFC PATCH 08/15] nvme-pci: Check DMA ops when indicating support for PCI P2PDMA 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-block@vger.kernel.org Introduce a supports_pci_p2pdma() operation in nvme_ctrl_ops to replace the fixed NVME_F_PCI_P2PDMA flag such that the dma_map_ops flags can be checked for PCI P2PDMA support. Signed-off-by: Logan Gunthorpe --- drivers/nvme/host/core.c | 3 ++- drivers/nvme/host/nvme.h | 2 +- drivers/nvme/host/pci.c | 11 +++++++++-- 3 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 376096bfc54a..f14316c9b34a 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3824,7 +3824,8 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid, blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, ns->queue); blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue); - if (ctrl->ops->flags & NVME_F_PCI_P2PDMA) + if (ctrl->ops->supports_pci_p2pdma && + ctrl->ops->supports_pci_p2pdma(ctrl)) blk_queue_flag_set(QUEUE_FLAG_PCI_P2PDMA, ns->queue); ns->queue->queuedata = ns; diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index cc111136a981..a0bfe8709cfc 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -465,7 +465,6 @@ struct nvme_ctrl_ops { unsigned int flags; #define NVME_F_FABRICS (1 << 0) #define NVME_F_METADATA_SUPPORTED (1 << 1) -#define NVME_F_PCI_P2PDMA (1 << 2) int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val); int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val); @@ -473,6 +472,7 @@ struct nvme_ctrl_ops { void (*submit_async_event)(struct nvme_ctrl *ctrl); void (*delete_ctrl)(struct nvme_ctrl *ctrl); int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); + bool (*supports_pci_p2pdma)(struct nvme_ctrl *ctrl); }; #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index df8f3612107f..ef7ce464a48d 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2686,17 +2686,24 @@ static int nvme_pci_get_address(struct nvme_ctrl *ctrl, char *buf, int size) return snprintf(buf, size, "%s\n", dev_name(&pdev->dev)); } +static bool nvme_pci_supports_pci_p2pdma(struct nvme_ctrl *ctrl) +{ + struct nvme_dev *dev = to_nvme_dev(ctrl); + + return dma_pci_p2pdma_supported(dev->dev); +} + static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { .name = "pcie", .module = THIS_MODULE, - .flags = NVME_F_METADATA_SUPPORTED | - NVME_F_PCI_P2PDMA, + .flags = NVME_F_METADATA_SUPPORTED, .reg_read32 = nvme_pci_reg_read32, .reg_write32 = nvme_pci_reg_write32, .reg_read64 = nvme_pci_reg_read64, .free_ctrl = nvme_pci_free_ctrl, .submit_async_event = nvme_pci_submit_async_event, .get_address = nvme_pci_get_address, + .supports_pci_p2pdma = nvme_pci_supports_pci_p2pdma, }; static int nvme_dev_map(struct nvme_dev *dev)