From mboxrd@z Thu Jan 1 00:00:00 1970 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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=ham 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 F3FE0C4167B for ; Mon, 13 Sep 2021 14:45:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA5A560FC0 for ; Mon, 13 Sep 2021 14:45:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346012AbhIMOqM (ORCPT ); Mon, 13 Sep 2021 10:46:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:58832 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347879AbhIMOo2 (ORCPT ); Mon, 13 Sep 2021 10:44:28 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 243CB619E5; Mon, 13 Sep 2021 13:57:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1631541463; bh=pZCtz+VcQpMDqnOR2CpYb1dH7lWkFEP+jxz5KMy4HbU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rl2/hpgellkZ0vwmifz3+lEnGGEhGaD0EZj9R+L1CPf5dbUJY64yIqbBtXVMZo1aJ bj9FTWSnxY2f1hfp7RL0ugrongxCX+qiFlZtQ1mBnFZNu8//W4qkui6hqvXWKTMqR7 XYBuSzYLiG5uVoezpBMAqtRS1BMq1+UYQXmogHbM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jacob Keller , Sunitha D Mekala , Tony Nguyen , Sasha Levin Subject: [PATCH 5.14 276/334] ice: restart periodic outputs around time changes Date: Mon, 13 Sep 2021 15:15:30 +0200 Message-Id: <20210913131122.756772719@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210913131113.390368911@linuxfoundation.org> References: <20210913131113.390368911@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jacob Keller [ Upstream commit 9ee313433c483e4a6ecd517c38c0f8aee1962c53 ] When we enabled auxiliary input/output support for the E810 device, we forgot to add logic to restart the output when we change time. This is important as the periodic output will be incorrect after a time change otherwise. This unfortunately includes the adjust time function, even though it uses an atomic hardware interface. The atomic adjustment can still cause the pin output to stall permanently, so we need to stop and restart it. Introduce wrapper functions to temporarily disable and then re-enable the clock outputs. Fixes: 172db5f91d5f ("ice: add support for auxiliary input/output pins") Signed-off-by: Jacob Keller Tested-by: Sunitha D Mekala Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/ice/ice_ptp.c | 49 ++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c index 8970037177fe..234bc68e79f9 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.c +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c @@ -688,6 +688,41 @@ err: return -EFAULT; } +/** + * ice_ptp_disable_all_clkout - Disable all currently configured outputs + * @pf: pointer to the PF structure + * + * Disable all currently configured clock outputs. This is necessary before + * certain changes to the PTP hardware clock. Use ice_ptp_enable_all_clkout to + * re-enable the clocks again. + */ +static void ice_ptp_disable_all_clkout(struct ice_pf *pf) +{ + uint i; + + for (i = 0; i < pf->ptp.info.n_per_out; i++) + if (pf->ptp.perout_channels[i].ena) + ice_ptp_cfg_clkout(pf, i, NULL, false); +} + +/** + * ice_ptp_enable_all_clkout - Enable all configured periodic clock outputs + * @pf: pointer to the PF structure + * + * Enable all currently configured clock outputs. Use this after + * ice_ptp_disable_all_clkout to reconfigure the output signals according to + * their configuration. + */ +static void ice_ptp_enable_all_clkout(struct ice_pf *pf) +{ + uint i; + + for (i = 0; i < pf->ptp.info.n_per_out; i++) + if (pf->ptp.perout_channels[i].ena) + ice_ptp_cfg_clkout(pf, i, &pf->ptp.perout_channels[i], + false); +} + /** * ice_ptp_gpio_enable_e810 - Enable/disable ancillary features of PHC * @info: the driver's PTP info structure @@ -783,12 +818,17 @@ ice_ptp_settime64(struct ptp_clock_info *info, const struct timespec64 *ts) goto exit; } + /* Disable periodic outputs */ + ice_ptp_disable_all_clkout(pf); + err = ice_ptp_write_init(pf, &ts64); ice_ptp_unlock(hw); if (!err) ice_ptp_update_cached_phctime(pf); + /* Reenable periodic outputs */ + ice_ptp_enable_all_clkout(pf); exit: if (err) { dev_err(ice_pf_to_dev(pf), "PTP failed to set time %d\n", err); @@ -842,8 +882,14 @@ static int ice_ptp_adjtime(struct ptp_clock_info *info, s64 delta) return -EBUSY; } + /* Disable periodic outputs */ + ice_ptp_disable_all_clkout(pf); + err = ice_ptp_write_adj(pf, delta); + /* Reenable periodic outputs */ + ice_ptp_enable_all_clkout(pf); + ice_ptp_unlock(hw); if (err) { @@ -1554,6 +1600,9 @@ void ice_ptp_release(struct ice_pf *pf) if (!pf->ptp.clock) return; + /* Disable periodic outputs */ + ice_ptp_disable_all_clkout(pf); + ice_clear_ptp_clock_index(pf); ptp_clock_unregister(pf->ptp.clock); pf->ptp.clock = NULL; -- 2.30.2