From patchwork Wed Mar 8 14:42:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Fedorenko X-Patchwork-Id: 13165984 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4087C6FD1E for ; Wed, 8 Mar 2023 14:46:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230319AbjCHOqV (ORCPT ); Wed, 8 Mar 2023 09:46:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232029AbjCHOoq (ORCPT ); Wed, 8 Mar 2023 09:44:46 -0500 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5E705AB7C for ; Wed, 8 Mar 2023 06:43:23 -0800 (PST) Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3288MYRI003608; Wed, 8 Mar 2023 06:42:31 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=s2048-2021-q4; bh=dE2fYQ7o6xTrMESvnWy9rd7ugEPx9g+tSoBG7FgA9+0=; b=TYl9ggXQFVEhq2slQLfMZF8O40HHCb7ymQrFgA5GmsP3I2CkS6fPrd+OQCrH0IiXd/py VXuKYgBV3oyD85EbC9iZB+XEs0qv/VKQumkjita0L7NMCkKqfueWs45Khua5jPB1kNHN M2oLkt7q4aT/o9MuTgaxOwC7WAievvl+X9h+FoRNrEPqPbsQ2Nom2tqjR8p29gUq3HAP tcMA4Jh3LYxDZ2utrX6svisXMLBcAkdo07kuzPno3cLrtjPisYUKo1ioLAY6rHUNhBsw CwXwqdvWuKzW/WhxqpmrQmTfmk2K2DGdnwMUa40HwizK03jrGhV4zFhWWt0HZ+w+dDn2 CQ== Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3p6ffbc4gr-11 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 08 Mar 2023 06:42:31 -0800 Received: from devvm1736.cln0.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::7) with Microsoft SMTP Server id 15.1.2507.17; Wed, 8 Mar 2023 06:42:29 -0800 From: Vadim Fedorenko To: Jakub Kicinski , Pavan Chebbi , Andy Gospodarek , Michael Chan CC: Vadim Fedorenko , Richard Cochran , Vadim Fedorenko , Subject: [PATCH net v2] bnxt_en: reset PHC frequency in free-running mode Date: Wed, 8 Mar 2023 06:42:09 -0800 Message-ID: <20230308144209.150456-1-vadfed@meta.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [2620:10d:c0a8:1b::d] X-Proofpoint-GUID: HYn_-elHqFp62oaKEMnzU0et-N5lUGfD X-Proofpoint-ORIG-GUID: HYn_-elHqFp62oaKEMnzU0et-N5lUGfD X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-08_08,2023-03-08_03,2023-02-09_01 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org When using a PHC in shared between multiple hosts, the previous frequency value may not be reset and could lead to host being unable to compensate the offset with timecounter adjustments. To avoid such state reset the hardware frequency of PHC to base frequency on init. Some refactoring is needed to make code readable. Fixes: 85036aee1938 ("bnxt_en: Add a non-real time mode to access NIC clock") Signed-off-by: Vadim Fedorenko --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 6 +- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 + drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 57 +++++++++++-------- 3 files changed, 36 insertions(+), 29 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 5d4b1f2ebeac..8472ff79adf3 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -6989,11 +6989,9 @@ static int bnxt_hwrm_func_qcfg(struct bnxt *bp) if (flags & FUNC_QCFG_RESP_FLAGS_FW_DCBX_AGENT_ENABLED) bp->fw_cap |= BNXT_FW_CAP_DCBX_AGENT; } - if (BNXT_PF(bp) && (flags & FUNC_QCFG_RESP_FLAGS_MULTI_HOST)) { + if (BNXT_PF(bp) && (flags & FUNC_QCFG_RESP_FLAGS_MULTI_HOST)) bp->flags |= BNXT_FLAG_MULTI_HOST; - if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC) - bp->fw_cap &= ~BNXT_FW_CAP_PTP_RTC; - } + if (flags & FUNC_QCFG_RESP_FLAGS_RING_MONITOR_ENABLED) bp->fw_cap |= BNXT_FW_CAP_RING_MONITOR; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index dcb09fbe4007..c0628ac1b798 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -2000,6 +2000,8 @@ struct bnxt { u32 fw_dbg_cap; #define BNXT_NEW_RM(bp) ((bp)->fw_cap & BNXT_FW_CAP_NEW_RM) +#define BNXT_PTP_USE_RTC(bp) (!BNXT_MH(bp) && \ + ((bp)->fw_cap & BNXT_FW_CAP_PTP_RTC)) u32 hwrm_spec_code; u16 hwrm_cmd_seq; u16 hwrm_cmd_kong_seq; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c index 4ec8bba18cdd..4ee8581b5fea 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c @@ -63,7 +63,7 @@ static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info, ptp_info); u64 ns = timespec64_to_ns(ts); - if (ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC) + if (BNXT_PTP_USE_RTC(ptp->bp)) return bnxt_ptp_cfg_settime(ptp->bp, ns); spin_lock_bh(&ptp->ptp_lock); @@ -196,7 +196,7 @@ static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta) struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, ptp_info); - if (ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC) + if (BNXT_PTP_USE_RTC(ptp->bp)) return bnxt_ptp_adjphc(ptp, delta); spin_lock_bh(&ptp->ptp_lock); @@ -205,34 +205,39 @@ static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta) return 0; } +static int bnxt_ptp_adjfine_rtc(struct bnxt *bp, long scaled_ppm) +{ + s32 ppb = scaled_ppm_to_ppb(scaled_ppm); + struct hwrm_port_mac_cfg_input *req; + int rc; + + rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG); + if (rc) + return rc; + + req->ptp_freq_adj_ppb = cpu_to_le32(ppb); + req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB); + rc = hwrm_req_send(bp, req); + if (rc) + netdev_err(bp->dev, + "ptp adjfine failed. rc = %d\n", rc); + return rc; +} + static int bnxt_ptp_adjfine(struct ptp_clock_info *ptp_info, long scaled_ppm) { struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, ptp_info); - struct hwrm_port_mac_cfg_input *req; struct bnxt *bp = ptp->bp; - int rc = 0; - if (!(ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC)) { - spin_lock_bh(&ptp->ptp_lock); - timecounter_read(&ptp->tc); - ptp->cc.mult = adjust_by_scaled_ppm(ptp->cmult, scaled_ppm); - spin_unlock_bh(&ptp->ptp_lock); - } else { - s32 ppb = scaled_ppm_to_ppb(scaled_ppm); - - rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG); - if (rc) - return rc; + if (BNXT_PTP_USE_RTC(ptp->bp)) + return bnxt_ptp_adjfine_rtc(bp, scaled_ppm); - req->ptp_freq_adj_ppb = cpu_to_le32(ppb); - req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB); - rc = hwrm_req_send(ptp->bp, req); - if (rc) - netdev_err(ptp->bp->dev, - "ptp adjfine failed. rc = %d\n", rc); - } - return rc; + spin_lock_bh(&ptp->ptp_lock); + timecounter_read(&ptp->tc); + ptp->cc.mult = adjust_by_scaled_ppm(ptp->cmult, scaled_ppm); + spin_unlock_bh(&ptp->ptp_lock); + return 0; } void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2) @@ -879,7 +884,7 @@ int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg) u64 ns; int rc; - if (!bp->ptp_cfg || !(bp->fw_cap & BNXT_FW_CAP_PTP_RTC)) + if (!bp->ptp_cfg || !BNXT_PTP_USE_RTC(bp)) return -ENODEV; if (!phc_cfg) { @@ -932,13 +937,15 @@ int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg) atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS); spin_lock_init(&ptp->ptp_lock); - if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC) { + if (BNXT_PTP_USE_RTC(ptp->bp)) { bnxt_ptp_timecounter_init(bp, false); rc = bnxt_ptp_init_rtc(bp, phc_cfg); if (rc) goto out; } else { bnxt_ptp_timecounter_init(bp, true); + if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC) + bnxt_ptp_adjfine_rtc(bp, 0); } ptp->ptp_info = bnxt_ptp_caps;