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=-19.3 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,MIME_HEADER_CTYPE_ONLY, SPF_HELO_NONE,SPF_PASS,T_TVD_MIME_NO_HEADERS,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 0A1A8C48BC2 for ; Sun, 27 Jun 2021 17:20:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDD0561477 for ; Sun, 27 Jun 2021 17:20:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231407AbhF0RXE (ORCPT ); Sun, 27 Jun 2021 13:23:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40528 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231396AbhF0RXB (ORCPT ); Sun, 27 Jun 2021 13:23:01 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B406EC061574 for ; Sun, 27 Jun 2021 10:20:37 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id b1so1033505pls.5 for ; Sun, 27 Jun 2021 10:20:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=GX5JWHS3tER4fXTfa4wdXdGrCJim9rFAkPM02eqa5W0=; b=h1pMgZDfX9UvAWZ+RPpeEBZt7FjNZrRtZWnVIaBniqAPXrNnPTPbcKTLJJ9KATC0ZN +IoN3Dnzg1LF4jYkCx9+6rfkoFOCQfgEcQKgTRRtW7QcoNJD+d1wVx35y44ueQcmAJLq Zr/whGcF72+Er7sXh+11mpxKuD5miLPA4gnqs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=GX5JWHS3tER4fXTfa4wdXdGrCJim9rFAkPM02eqa5W0=; b=Gw8xCphLtvol+OfUcXJMPPU3SBfKjfcVxVuzgctZWq/HV68gFsWHnUlibiYNzSK3IF b/yqgupn0hOjdHO7k37DWxzqVVHkhtvx+7+CBEqOQPOlcT8eoDYl6wwdsNSn1E6lsFWl 79QMlrLrKzgmgONZUs19UbqDo8vaObui19Wvo0LIHgnKaNGNHOH/NFV2xiVPg1q9WmKU q6a2CJX3RhNN16xNaarsc8+PZ0WtJkvfbprZKuBNtfYIfEPStfrBfPLYcAa8J1WIRgb/ 7fbJH8x+n5cZz32XvKOc8LbpFppa8CU6H76ghktfdBUdt+LN67vLgG36ID3f9gECRUSx TE7w== X-Gm-Message-State: AOAM53281TyEzVXJDE7cl9JhfWc3VQqyLTIanq7tS57Pre8tBOmG+sYA bndx+TMwyTnH/ACHYaRca45rKfDikzIfW7zd X-Google-Smtp-Source: ABdhPJxN+rA6OP8LM9/8FNGSUengLHNx2eYg04GOauGIaCx+Bphz5WFjK0hkXpg68v+eb0rBN3abPg== X-Received: by 2002:a17:902:a70f:b029:ea:d4a8:6a84 with SMTP id w15-20020a170902a70fb02900ead4a86a84mr18801366plq.42.1624814436991; Sun, 27 Jun 2021 10:20:36 -0700 (PDT) Received: from localhost.swdvt.lab.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id j8sm11011584pfu.60.2021.06.27.10.20.33 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 27 Jun 2021 10:20:36 -0700 (PDT) From: Michael Chan To: davem@davemloft.net Cc: netdev@vger.kernel.org, kuba@kernel.org, gospo@broadcom.com, richardcochran@gmail.com, pavan.chebbi@broadcom.com, edwin.peer@broadcom.com Subject: [PATCH net-next v2 6/7] bnxt_en: Transmit and retrieve packet timestamps Date: Sun, 27 Jun 2021 13:19:49 -0400 Message-Id: <1624814390-1300-7-git-send-email-michael.chan@broadcom.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1624814390-1300-1-git-send-email-michael.chan@broadcom.com> References: <1624814390-1300-1-git-send-email-michael.chan@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000005f14e205c5c2975f" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --0000000000005f14e205c5c2975f From: Pavan Chebbi Setup the TXBD to enable TX timestamp if requested. At TX packet DMA completion, if we requested TX timestamp on that packet, we defer to .do_aux_work() to obtain the TX timestamp from the firmware before we free the TX SKB. v2: Use .do_aux_work() to get the TX timestamp from firmware. Reviewed-by: Edwin Peer Signed-off-by: Pavan Chebbi Signed-off-by: Michael Chan --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 38 +++++++- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 + drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 94 +++++++++++++++++++ drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 2 + 4 files changed, 131 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 5132f07a5f43..e198e1426551 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -421,12 +421,25 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev) vlan_tag_flags |= 1 << TX_BD_CFA_META_TPID_SHIFT; } - if (unlikely(skb->no_fcs)) { - lflags |= cpu_to_le32(TX_BD_FLAGS_NO_CRC); - goto normal_tx; + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) { + struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; + + if (ptp && ptp->tx_tstamp_en && !skb_is_gso(skb) && + atomic_dec_if_positive(&ptp->tx_avail) >= 0) { + if (!bnxt_ptp_parse(skb, &ptp->tx_seqid)) { + lflags |= cpu_to_le32(TX_BD_FLAGS_STAMP); + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + } else { + atomic_inc(&bp->ptp_cfg->tx_avail); + } + } } - if (free_size == bp->tx_ring_size && length <= bp->tx_push_thresh) { + if (unlikely(skb->no_fcs)) + lflags |= cpu_to_le32(TX_BD_FLAGS_NO_CRC); + + if (free_size == bp->tx_ring_size && length <= bp->tx_push_thresh && + !lflags) { struct tx_push_buffer *tx_push_buf = txr->tx_push; struct tx_push_bd *tx_push = &tx_push_buf->push_bd; struct tx_bd_ext *tx_push1 = &tx_push->txbd2; @@ -593,6 +606,8 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev) netdev_tx_sent_queue(txq, skb->len); + skb_tx_timestamp(skb); + /* Sync BD data before updating doorbell */ wmb(); @@ -622,6 +637,9 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; tx_dma_error: + if (BNXT_TX_PTP_IS_SET(lflags)) + atomic_inc(&bp->ptp_cfg->tx_avail); + last_frag = i; /* start back at beginning and unmap skb */ @@ -656,6 +674,7 @@ static void bnxt_tx_int(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts) for (i = 0; i < nr_pkts; i++) { struct bnxt_sw_tx_bd *tx_buf; + bool compl_deferred = false; struct sk_buff *skb; int j, last; @@ -682,12 +701,21 @@ static void bnxt_tx_int(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts) skb_frag_size(&skb_shinfo(skb)->frags[j]), PCI_DMA_TODEVICE); } + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) { + if (bp->flags & BNXT_FLAG_CHIP_P5) { + if (!bnxt_get_tx_ts_p5(bp, skb)) + compl_deferred = true; + else + atomic_inc(&bp->ptp_cfg->tx_avail); + } + } next_tx_int: cons = NEXT_TX(cons); tx_bytes += skb->len; - dev_kfree_skb_any(skb); + if (!compl_deferred) + dev_kfree_skb_any(skb); } netdev_tx_completed_queue(txq, nr_pkts, tx_bytes); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 94a612e8cd42..bcf8d00b8c80 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -89,6 +89,8 @@ struct tx_bd_ext { #define TX_BD_CFA_META_KEY_VLAN (1 << 28) }; +#define BNXT_TX_PTP_IS_SET(lflags) ((lflags) & cpu_to_le32(TX_BD_FLAGS_STAMP)) + struct rx_bd { __le32 rx_bd_len_flags_type; #define RX_BD_TYPE (0x3f << 0) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c index cea7220f3d1b..f698b6bd4ff8 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c @@ -15,10 +15,32 @@ #include #include #include +#include #include "bnxt_hsi.h" #include "bnxt.h" #include "bnxt_ptp.h" +int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id) +{ + unsigned int ptp_class; + struct ptp_header *hdr; + + ptp_class = ptp_classify_raw(skb); + + switch (ptp_class & PTP_CLASS_VMASK) { + case PTP_CLASS_V1: + case PTP_CLASS_V2: + hdr = ptp_parse_header(skb, ptp_class); + if (!hdr) + return -EINVAL; + + *seq_id = ntohs(hdr->sequence_id); + return 0; + default: + return -ERANGE; + } +} + static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info, const struct timespec64 *ts) { @@ -57,6 +79,28 @@ static void bnxt_ptp_get_current_time(struct bnxt *bp) spin_unlock_bh(&ptp->ptp_lock); } +static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts) +{ + struct hwrm_port_ts_query_output *resp = bp->hwrm_cmd_resp_addr; + struct hwrm_port_ts_query_input req = {0}; + int rc; + + bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_TS_QUERY, -1, -1); + req.flags = cpu_to_le32(flags); + if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) == + PORT_TS_QUERY_REQ_FLAGS_PATH_TX) { + req.enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES); + req.ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid); + req.ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT); + } + mutex_lock(&bp->hwrm_cmd_lock); + rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); + if (!rc) + *ts = le64_to_cpu(resp->ptp_msg_ts); + mutex_unlock(&bp->hwrm_cmd_lock); + return rc; +} + static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info, struct timespec64 *ts, struct ptp_system_timestamp *sts) @@ -269,16 +313,62 @@ static u64 bnxt_cc_read(const struct cyclecounter *cc) return bnxt_refclk_read(ptp->bp, NULL); } +static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb) +{ + struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; + struct skb_shared_hwtstamps timestamp; + u64 ts = 0, ns = 0; + int rc; + + rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts); + if (!rc) { + memset(×tamp, 0, sizeof(timestamp)); + spin_lock_bh(&ptp->ptp_lock); + ns = timecounter_cyc2time(&ptp->tc, ts); + spin_unlock_bh(&ptp->ptp_lock); + timestamp.hwtstamp = ns_to_ktime(ns); + skb_tstamp_tx(ptp->tx_skb, ×tamp); + } else { + netdev_err(bp->dev, "TS query for TX timer failed rc = %x\n", + rc); + } + + dev_kfree_skb_any(ptp->tx_skb); + ptp->tx_skb = NULL; + atomic_inc(&ptp->tx_avail); +} + static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info) { struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, ptp_info); + unsigned long now = jiffies; struct bnxt *bp = ptp->bp; + if (ptp->tx_skb) + bnxt_stamp_tx_skb(bp, ptp->tx_skb); + + if (!time_after_eq(now, ptp->next_period)) + return ptp->next_period - now; + bnxt_ptp_get_current_time(bp); + ptp->next_period = now + HZ; return HZ; } +int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb) +{ + struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; + + if (ptp->tx_skb) { + netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n"); + return -EBUSY; + } + ptp->tx_skb = skb; + ptp_schedule_worker(ptp->ptp_clock, 0); + return 0; +} + int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts) { struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; @@ -375,5 +465,9 @@ void bnxt_ptp_clear(struct bnxt *bp) ptp_clock_unregister(ptp->ptp_clock); ptp->ptp_clock = NULL; + if (ptp->tx_skb) { + dev_kfree_skb_any(ptp->tx_skb); + ptp->tx_skb = NULL; + } bnxt_unmap_ptp_regs(bp); } diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h index 4f2c62f5a78e..6b6245750e20 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h @@ -70,8 +70,10 @@ do { \ ((dst) = READ_ONCE(src)) #endif +int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id); int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr); int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr); +int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb); int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts); void bnxt_ptp_start(struct bnxt *bp); int bnxt_ptp_init(struct bnxt *bp); -- 2.18.1 --0000000000005f14e205c5c2975f Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 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