From patchwork Thu May 21 14:56:42 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Or Gerlitz X-Patchwork-Id: 6456001 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 096B9C0432 for ; Thu, 21 May 2015 14:58:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CC733202A1 for ; Thu, 21 May 2015 14:57:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF92220481 for ; Thu, 21 May 2015 14:57:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964806AbbEUO5U (ORCPT ); Thu, 21 May 2015 10:57:20 -0400 Received: from ns1327.ztomy.com ([193.47.165.129]:43062 "EHLO mellanox.co.il" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S964811AbbEUO5U (ORCPT ); Thu, 21 May 2015 10:57:20 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from ogerlitz@mellanox.com) with ESMTPS (AES256-SHA encrypted); 21 May 2015 17:56:35 +0300 Received: from r-vnc04.mtr.labs.mlnx (r-vnc04.mtr.labs.mlnx [10.208.0.116]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id t4LEuhjM003466; Thu, 21 May 2015 17:56:44 +0300 From: Or Gerlitz To: Doug Ledford Cc: linux-rdma@vger.kernel.org, Amir Vadai , Tal Alon , Matan Barak , Or Gerlitz Subject: [PATCH for-next V1 11/11] IB/mlx4: Return hca core clock's offset in query_device vendor's data Date: Thu, 21 May 2015 17:56:42 +0300 Message-Id: <1432220202-9834-12-git-send-email-ogerlitz@mellanox.com> X-Mailer: git-send-email 1.7.8.2 In-Reply-To: <1432220202-9834-1-git-send-email-ogerlitz@mellanox.com> References: <1432220202-9834-1-git-send-email-ogerlitz@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matan Barak In order to read the HCA's core clock, the user-space needs to query the correct offset in the mapped page. This offset is passed through query_device's vendor specific data. Signed-off-by: Matan Barak Signed-off-by: Or Gerlitz --- drivers/infiniband/hw/mlx4/main.c | 36 ++++++++++++++++++++++++++++++++- drivers/infiniband/hw/mlx4/mlx4_ib.h | 15 ++++++++++++++ 2 files changed, 49 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index a5a90c4..84001cf 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -140,10 +140,27 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, struct ib_smp *out_mad = NULL; int err = -ENOMEM; int have_ib_ports; + struct mlx4_uverbs_ex_query_device cmd; + struct mlx4_uverbs_ex_query_device_resp resp = {.comp_mask = 0}; + struct mlx4_clock_params clock_params; - if (uhw->inlen || uhw->outlen) - return -EINVAL; + if (uhw->inlen) { + if (uhw->inlen < sizeof(cmd)) + return -EINVAL; + + err = ib_copy_from_udata(&cmd, uhw, sizeof(cmd)); + if (err) + return err; + + if (cmd.comp_mask) + return -EINVAL; + + if (cmd.reserved) + return -EINVAL; + } + resp.response_length = offsetof(typeof(resp), response_length) + + sizeof(resp.response_length); in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL); out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); if (!in_mad || !out_mad) @@ -236,6 +253,21 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, props->hca_core_clock = dev->dev->caps.hca_core_clock; props->timestamp_mask = 0xFFFFFFFFFFFFULL; + err = mlx4_get_internal_clock_params(dev->dev, &clock_params); + if (err) + goto out; + + if (uhw->outlen >= resp.response_length + sizeof(resp.hca_core_clock_offset)) { + resp.hca_core_clock_offset = clock_params.offset % PAGE_SIZE; + resp.response_length += sizeof(resp.hca_core_clock_offset); + resp.comp_mask |= QUERY_DEVICE_RESP_MASK_TIMESTAMP; + } + + if (uhw->outlen) { + err = ib_copy_to_udata(uhw, &resp, resp.response_length); + if (err) + goto out; + } out: kfree(in_mad); kfree(out_mad); diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h index ae04dad..8421e15 100644 --- a/drivers/infiniband/hw/mlx4/mlx4_ib.h +++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h @@ -556,6 +556,21 @@ struct mlx4_ib_qp_tunnel_init_attr { u8 port; }; +struct mlx4_uverbs_ex_query_device { + __u32 comp_mask; + __u32 reserved; +}; + +enum query_device_resp_mask { + QUERY_DEVICE_RESP_MASK_TIMESTAMP = 1UL << 0, +}; + +struct mlx4_uverbs_ex_query_device_resp { + __u32 comp_mask; + __u32 response_length; + __u64 hca_core_clock_offset; +}; + static inline struct mlx4_ib_dev *to_mdev(struct ib_device *ibdev) { return container_of(ibdev, struct mlx4_ib_dev, ib_dev);