From patchwork Wed Mar 27 05:42:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vankar, Chintan" X-Patchwork-Id: 13605584 X-Patchwork-Delegate: kuba@kernel.org Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF5A6FC18; Wed, 27 Mar 2024 05:42:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.141 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711518173; cv=none; b=WGd4vSK97hesITAS3a9chw4D6dIYcNfm0dru2rgrs/W+cXKdxyKb3AAAFsLeaxd+7IOr6G+kcyDt62trnGUMwekBQHTZ/Cj016xH/LCyBDiYFluVpvDd6mEK6xNV2HQXV6KVoOd59+cIHBknKqBYBiM6whzWVkIy8FxohKTFzak= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711518173; c=relaxed/simple; bh=QQaHLtuCVDpufz/dWiNPqyz029e9Y48ZpXiYSb0Ohnc=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=dqDa0FXHqe+FHZZtIVDuoD2Goz3p6Y75t85x8uv+qO68AcrSZE7D1F+O5F0tReot5Rss3WFJxEFfarlPS2mgyF6ZOLN0xKfZvA3zYvS0LCRhIl5ITnubFNglkDApXUcOsF2JnCsyeWhxcHC7VKQaY96bVs7I8uiSbdqgTrPFAT0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=FTc0Ehpp; arc=none smtp.client-ip=198.47.19.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="FTc0Ehpp" Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 42R5gaEQ081137; Wed, 27 Mar 2024 00:42:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1711518156; bh=ErIA36PB/xIN23wrInJjOe4P3aBvVzJ24Brluvn2JoU=; h=From:To:CC:Subject:Date; b=FTc0Ehppng+kGcqn3OxGjuZrHKLWTmSvNii/CiQjQuuEyZAXEbrdCPbTHdaAhxy6n FXXGLKPhVvug/npXMZnUee8OZu1dwZi/kyC+bBaBXy+Rg1X7y1MsMLruZq6/IrFSOG zLCV2cTrkc+fxyMMDHnXBC1l8wh4OwTp+83RmD2A= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 42R5gavO002199 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 27 Mar 2024 00:42:36 -0500 Received: from DFLE111.ent.ti.com (10.64.6.32) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Wed, 27 Mar 2024 00:42:36 -0500 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DFLE111.ent.ti.com (10.64.6.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Wed, 27 Mar 2024 00:42:36 -0500 Received: from localhost (chintan-thinkstation-p360-tower.dhcp.ti.com [172.24.227.220]) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 42R5gZE4092551; Wed, 27 Mar 2024 00:42:36 -0500 From: Chintan Vankar To: Dan Carpenter , Siddharth Vadapalli , Grygorii Strashko , "Heiner Kallweit" , Vladimir Oltean , Chintan Vankar , Andrew Lunn , Roger Quadros , Richard Cochran , Paolo Abeni , Jakub Kicinski , Eric Dumazet , "David S. Miller" CC: , Subject: [PATCH net-next v4 1/3] net: ethernet: ti: am65-cpts: Enable PTP RX HW timestamp using CPTS FIFO Date: Wed, 27 Mar 2024 11:12:32 +0530 Message-ID: <20240327054234.1906957-1-c-vankar@ti.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-Patchwork-Delegate: kuba@kernel.org CPTS module supports capturing timestamp for every packet it receives, add a new function named "am65_cpts_find_rx_ts()" to get the timestamp of received packets from CPTS FIFO. Add another function named "am65_cpts_rx_timestamp()" which internally calls "am65_cpts_find_rx_ts()" function and timestamps the received PTP packets. Signed-off-by: Chintan Vankar --- Changes from v3 to v4: - No change in v4. Link to v3: https://lore.kernel.org/r/20240320102600.3418248-1-c-vankar@ti.com/ drivers/net/ethernet/ti/am65-cpts.c | 65 +++++++++++++++++++++++++++++ drivers/net/ethernet/ti/am65-cpts.h | 6 +++ 2 files changed, 71 insertions(+) diff --git a/drivers/net/ethernet/ti/am65-cpts.c b/drivers/net/ethernet/ti/am65-cpts.c index c66618d91c28..040953ea8cc2 100644 --- a/drivers/net/ethernet/ti/am65-cpts.c +++ b/drivers/net/ethernet/ti/am65-cpts.c @@ -906,6 +906,71 @@ static int am65_skb_get_mtype_seqid(struct sk_buff *skb, u32 *mtype_seqid) return 1; } +static u64 am65_cpts_find_rx_ts(struct am65_cpts *cpts, u32 skb_mtype_seqid) +{ + struct list_head *this, *next; + struct am65_cpts_event *event; + unsigned long flags; + u32 mtype_seqid; + u64 ns = 0; + + am65_cpts_fifo_read(cpts); + spin_lock_irqsave(&cpts->lock, flags); + list_for_each_safe(this, next, &cpts->events) { + event = list_entry(this, struct am65_cpts_event, list); + if (time_after(jiffies, event->tmo)) { + list_del_init(&event->list); + list_add(&event->list, &cpts->pool); + continue; + } + + mtype_seqid = event->event1 & + (AM65_CPTS_EVENT_1_MESSAGE_TYPE_MASK | + AM65_CPTS_EVENT_1_SEQUENCE_ID_MASK | + AM65_CPTS_EVENT_1_EVENT_TYPE_MASK); + + if (mtype_seqid == skb_mtype_seqid) { + ns = event->timestamp; + list_del_init(&event->list); + list_add(&event->list, &cpts->pool); + break; + } + } + spin_unlock_irqrestore(&cpts->lock, flags); + + return ns; +} + +void am65_cpts_rx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb) +{ + struct am65_cpts_skb_cb_data *skb_cb = (struct am65_cpts_skb_cb_data *)skb->cb; + struct skb_shared_hwtstamps *ssh; + int ret; + u64 ns; + + /* am65_cpts_rx_timestamp() is called before eth_type_trans(), so + * skb MAC Hdr properties are not configured yet. Hence need to + * reset skb MAC header here + */ + skb_reset_mac_header(skb); + ret = am65_skb_get_mtype_seqid(skb, &skb_cb->skb_mtype_seqid); + if (!ret) + return; /* if not PTP class packet */ + + skb_cb->skb_mtype_seqid |= (AM65_CPTS_EV_RX << AM65_CPTS_EVENT_1_EVENT_TYPE_SHIFT); + + dev_dbg(cpts->dev, "%s mtype seqid %08x\n", __func__, skb_cb->skb_mtype_seqid); + + ns = am65_cpts_find_rx_ts(cpts, skb_cb->skb_mtype_seqid); + if (!ns) + return; + + ssh = skb_hwtstamps(skb); + memset(ssh, 0, sizeof(*ssh)); + ssh->hwtstamp = ns_to_ktime(ns); +} +EXPORT_SYMBOL_GPL(am65_cpts_rx_timestamp); + /** * am65_cpts_tx_timestamp - save tx packet for timestamping * @cpts: cpts handle diff --git a/drivers/net/ethernet/ti/am65-cpts.h b/drivers/net/ethernet/ti/am65-cpts.h index 6e14df0be113..90296968a75c 100644 --- a/drivers/net/ethernet/ti/am65-cpts.h +++ b/drivers/net/ethernet/ti/am65-cpts.h @@ -22,6 +22,7 @@ void am65_cpts_release(struct am65_cpts *cpts); struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, struct device_node *node); int am65_cpts_phc_index(struct am65_cpts *cpts); +void am65_cpts_rx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb); void am65_cpts_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb); void am65_cpts_prep_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb); void am65_cpts_rx_enable(struct am65_cpts *cpts, bool en); @@ -48,6 +49,11 @@ static inline int am65_cpts_phc_index(struct am65_cpts *cpts) return -1; } +static inline void am65_cpts_rx_timestamp(struct am65_cpts *cpts, + struct sk_buff *skb) +{ +} + static inline void am65_cpts_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb) {