From patchwork Fri Mar 20 19:42:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Grygorii Strashko X-Patchwork-Id: 11450231 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 99FC414B4 for ; Fri, 20 Mar 2020 19:43:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7005C20781 for ; Fri, 20 Mar 2020 19:43:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="SiKyu5hY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727093AbgCTTnN (ORCPT ); Fri, 20 Mar 2020 15:43:13 -0400 Received: from lelv0143.ext.ti.com ([198.47.23.248]:44702 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726783AbgCTTnN (ORCPT ); Fri, 20 Mar 2020 15:43:13 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 02KJh6PP018559; Fri, 20 Mar 2020 14:43:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1584733387; bh=r65crBqSQyMLYoz3u50e2Ikb848eo23JjhikeJXrBxA=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=SiKyu5hY3up2ajwl4kPZGoY2euC+DzuDeG/7Dx04H90bsO+45sy4gazOJPCc3pAM4 lIqatNvVe+LctZ/RYpWhx2+fSUyxvuNSpQnr3zm8Vukgqvn9Lgm//uZWZKAYJKJoNK KK8gtwagrpZDIj39dcl3DlKSHTGzrgGwMdRMzMR8= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 02KJh6pQ114216 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 20 Mar 2020 14:43:06 -0500 Received: from DLEE108.ent.ti.com (157.170.170.38) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Fri, 20 Mar 2020 14:43:06 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Fri, 20 Mar 2020 14:43:06 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 02KJh53U042903; Fri, 20 Mar 2020 14:43:06 -0500 From: Grygorii Strashko To: "David S . Miller" , Richard Cochran , Lokesh Vutla , Tony Lindgren CC: Sekhar Nori , Murali Karicheri , netdev , , , Grygorii Strashko Subject: [PATCH net-next v3 02/11] net: ethernet: ti: cpts: separate hw counter read from timecounter Date: Fri, 20 Mar 2020 21:42:35 +0200 Message-ID: <20200320194244.4703-3-grygorii.strashko@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200320194244.4703-1-grygorii.strashko@ti.com> References: <20200320194244.4703-1-grygorii.strashko@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Separate hw counter read from timecounter code: - add CPTS context field to store current HW counter value - move HW timestamp request and FIFO read code out of timecounter code - convert cyc2time on event reception in cpts_fifo_read() - call timecounter_read() in cpts_fifo_read() to update tk->cycle_last Signed-off-by: Grygorii Strashko --- drivers/net/ethernet/ti/cpts.c | 53 +++++++++++++++++----------------- drivers/net/ethernet/ti/cpts.h | 2 ++ 2 files changed, 29 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c index f07b40504e5b..6a1844cd23ff 100644 --- a/drivers/net/ethernet/ti/cpts.c +++ b/drivers/net/ethernet/ti/cpts.c @@ -112,10 +112,8 @@ static bool cpts_match_tx_ts(struct cpts *cpts, struct cpts_event *event) (struct cpts_skb_cb_data *)skb->cb; if (cpts_match(skb, class, seqid, mtype)) { - u64 ns = timecounter_cyc2time(&cpts->tc, event->low); - memset(&ssh, 0, sizeof(ssh)); - ssh.hwtstamp = ns_to_ktime(ns); + ssh.hwtstamp = ns_to_ktime(event->timestamp); skb_tstamp_tx(skb, &ssh); found = true; __skb_unlink(skb, &cpts->txq); @@ -158,8 +156,16 @@ static int cpts_fifo_read(struct cpts *cpts, int match) event->tmo = jiffies + 2; event->high = hi; event->low = lo; + event->timestamp = timecounter_cyc2time(&cpts->tc, event->low); type = event_type(event); + + dev_dbg(cpts->dev, "CPTS_EV: %d high:%08X low:%08x\n", + type, event->high, event->low); switch (type) { + case CPTS_EV_PUSH: + WRITE_ONCE(cpts->cur_timestamp, lo); + timecounter_read(&cpts->tc); + break; case CPTS_EV_TX: if (cpts_match_tx_ts(cpts, event)) { /* if the new event matches an existing skb, @@ -168,7 +174,6 @@ static int cpts_fifo_read(struct cpts *cpts, int match) break; } /* fall through */ - case CPTS_EV_PUSH: case CPTS_EV_RX: list_del_init(&event->list); list_add_tail(&event->list, &cpts->events); @@ -189,26 +194,17 @@ static int cpts_fifo_read(struct cpts *cpts, int match) static u64 cpts_systim_read(const struct cyclecounter *cc) { - u64 val = 0; - struct cpts_event *event; - struct list_head *this, *next; struct cpts *cpts = container_of(cc, struct cpts, cc); - cpts_write32(cpts, TS_PUSH, ts_push); - if (cpts_fifo_read(cpts, CPTS_EV_PUSH)) - dev_err(cpts->dev, "cpts: unable to obtain a time stamp\n"); + return READ_ONCE(cpts->cur_timestamp); +} - list_for_each_safe(this, next, &cpts->events) { - event = list_entry(this, struct cpts_event, list); - if (event_type(event) == CPTS_EV_PUSH) { - list_del_init(&event->list); - list_add(&event->list, &cpts->pool); - val = event->low; - break; - } - } +static void cpts_update_cur_time(struct cpts *cpts, int match) +{ + cpts_write32(cpts, TS_PUSH, ts_push); - return val; + if (cpts_fifo_read(cpts, match) && match != -1) + dev_err(cpts->dev, "cpts: unable to obtain a time stamp\n"); } /* PTP clock operations */ @@ -232,7 +228,7 @@ static int cpts_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) spin_lock_irqsave(&cpts->lock, flags); - timecounter_read(&cpts->tc); + cpts_update_cur_time(cpts, CPTS_EV_PUSH); cpts->cc.mult = neg_adj ? mult - diff : mult + diff; @@ -260,6 +256,9 @@ static int cpts_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) struct cpts *cpts = container_of(ptp, struct cpts, info); spin_lock_irqsave(&cpts->lock, flags); + + cpts_update_cur_time(cpts, CPTS_EV_PUSH); + ns = timecounter_read(&cpts->tc); spin_unlock_irqrestore(&cpts->lock, flags); @@ -294,11 +293,14 @@ static long cpts_overflow_check(struct ptp_clock_info *ptp) { struct cpts *cpts = container_of(ptp, struct cpts, info); unsigned long delay = cpts->ov_check_period; - struct timespec64 ts; unsigned long flags; + u64 ns; spin_lock_irqsave(&cpts->lock, flags); - ts = ns_to_timespec64(timecounter_read(&cpts->tc)); + + cpts_update_cur_time(cpts, -1); + + ns = timecounter_read(&cpts->tc); if (!skb_queue_empty(&cpts->txq)) { cpts_purge_txq(cpts); @@ -307,8 +309,7 @@ static long cpts_overflow_check(struct ptp_clock_info *ptp) } spin_unlock_irqrestore(&cpts->lock, flags); - dev_dbg(cpts->dev, "cpts overflow check at %lld.%09ld\n", - (long long)ts.tv_sec, ts.tv_nsec); + dev_dbg(cpts->dev, "cpts overflow check at %lld\n", ns); return (long)delay; } @@ -390,7 +391,7 @@ static u64 cpts_find_ts(struct cpts *cpts, struct sk_buff *skb, int ev_type) seqid = (event->high >> SEQUENCE_ID_SHIFT) & SEQUENCE_ID_MASK; if (ev_type == event_type(event) && cpts_match(skb, class, seqid, mtype)) { - ns = timecounter_cyc2time(&cpts->tc, event->low); + ns = event->timestamp; list_del_init(&event->list); list_add(&event->list, &cpts->pool); break; diff --git a/drivers/net/ethernet/ti/cpts.h b/drivers/net/ethernet/ti/cpts.h index bb997c11ee15..32ecd1ce4d3b 100644 --- a/drivers/net/ethernet/ti/cpts.h +++ b/drivers/net/ethernet/ti/cpts.h @@ -94,6 +94,7 @@ struct cpts_event { unsigned long tmo; u32 high; u32 low; + u64 timestamp; }; struct cpts { @@ -114,6 +115,7 @@ struct cpts { struct cpts_event pool_data[CPTS_MAX_EVENTS]; unsigned long ov_check_period; struct sk_buff_head txq; + u64 cur_timestamp; }; void cpts_rx_timestamp(struct cpts *cpts, struct sk_buff *skb);