From patchwork Mon Jul 3 18:12:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Larysa Zaremba X-Patchwork-Id: 13300346 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 CA86011C85; Mon, 3 Jul 2023 18:17:17 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 252BD1722; Mon, 3 Jul 2023 11:16:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1688408205; x=1719944205; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QcQko5o8Af5xtFWMAURcd8tFAMeLN0CQdJ61NEmYZMA=; b=mqhWg4Coz3i49Xhvk0oyd7+p8Ovq0VWRT34kzIkwRpApiSSzNBhzCnDc rzYX9fPODBW5q7iu2hOa6ff+fEIyrMW1JfgqWulXFqkbWlpdATNxRaxXu qapRtCi/5i5wsXVCBIbU59I67xKPnrbajQUGMw85BclNlcXWZwtWqWNzN 8hDAbA/Jg3hu4EaACyTvbq7A5SfEFNlYuctkYw/zIPqN3mvOaQN9C7cT9 O6CyFwhf/Lyb8AvsS0dH9UQzc47mlldt3PTBARAwwWRDboJiZ2hIAOwsr 92ljzyctUgp4bBEfcOl7fuOEI8HULPC4q6UxDFYBh7uUM4rwFoaBcFidC w==; X-IronPort-AV: E=McAfee;i="6600,9927,10760"; a="428982874" X-IronPort-AV: E=Sophos;i="6.01,178,1684825200"; d="scan'208";a="428982874" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Jul 2023 11:16:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10760"; a="753816392" X-IronPort-AV: E=Sophos;i="6.01,178,1684825200"; d="scan'208";a="753816392" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by orsmga001.jf.intel.com with ESMTP; 03 Jul 2023 11:16:36 -0700 Received: from lincoln.igk.intel.com (lincoln.igk.intel.com [10.102.21.235]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 4BA2D35803; Mon, 3 Jul 2023 19:16:34 +0100 (IST) From: Larysa Zaremba To: bpf@vger.kernel.org Cc: Larysa Zaremba , ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, David Ahern , Jakub Kicinski , Willem de Bruijn , Jesper Dangaard Brouer , Anatoly Burakov , Alexander Lobakin , Magnus Karlsson , Maryam Tahhan , xdp-hints@xdp-project.net, netdev@vger.kernel.org Subject: [PATCH bpf-next v2 02/20] ice: make RX HW timestamp reading code more reusable Date: Mon, 3 Jul 2023 20:12:08 +0200 Message-ID: <20230703181226.19380-3-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230703181226.19380-1-larysa.zaremba@intel.com> References: <20230703181226.19380-1-larysa.zaremba@intel.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net Previously, we only needed RX HW timestamp in skb path, hence all related code was written with skb in mind. But with the addition of XDP hints via kfuncs to the ice driver, the same logic will be needed in .xmo_() callbacks. Put generic process of reading RX HW timestamp from a descriptor into a separate function. Move skb-related code into another source file. Signed-off-by: Larysa Zaremba --- drivers/net/ethernet/intel/ice/ice_ptp.c | 24 ++++++------------ drivers/net/ethernet/intel/ice/ice_ptp.h | 15 ++++++----- drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 25 ++++++++++++++++++- 3 files changed, 41 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c index 81d96a40d5a7..a31333972c68 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.c +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c @@ -2147,30 +2147,24 @@ int ice_ptp_set_ts_config(struct ice_pf *pf, struct ifreq *ifr) } /** - * ice_ptp_rx_hwtstamp - Check for an Rx timestamp - * @rx_ring: Ring to get the VSI info + * ice_ptp_get_rx_hwts - Get packet Rx timestamp * @rx_desc: Receive descriptor - * @skb: Particular skb to send timestamp with + * @cached_time: Cached PHC time * * The driver receives a notification in the receive descriptor with timestamp. - * The timestamp is in ns, so we must convert the result first. */ -void -ice_ptp_rx_hwtstamp(struct ice_rx_ring *rx_ring, - union ice_32b_rx_flex_desc *rx_desc, struct sk_buff *skb) +u64 ice_ptp_get_rx_hwts(const union ice_32b_rx_flex_desc *rx_desc, + u64 cached_time) { - struct skb_shared_hwtstamps *hwtstamps; - u64 ts_ns, cached_time; u32 ts_high; + u64 ts_ns; if (!(rx_desc->wb.time_stamp_low & ICE_PTP_TS_VALID)) - return; - - cached_time = READ_ONCE(rx_ring->cached_phctime); + return 0; /* Do not report a timestamp if we don't have a cached PHC time */ if (!cached_time) - return; + return 0; /* Use ice_ptp_extend_32b_ts directly, using the ring-specific cached * PHC value, rather than accessing the PF. This also allows us to @@ -2181,9 +2175,7 @@ ice_ptp_rx_hwtstamp(struct ice_rx_ring *rx_ring, ts_high = le32_to_cpu(rx_desc->wb.flex_ts.ts_high); ts_ns = ice_ptp_extend_32b_ts(cached_time, ts_high); - hwtstamps = skb_hwtstamps(skb); - memset(hwtstamps, 0, sizeof(*hwtstamps)); - hwtstamps->hwtstamp = ns_to_ktime(ts_ns); + return ts_ns; } /** diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.h b/drivers/net/ethernet/intel/ice/ice_ptp.h index 995a57019ba7..523eefbfdf95 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.h +++ b/drivers/net/ethernet/intel/ice/ice_ptp.h @@ -268,9 +268,8 @@ void ice_ptp_extts_event(struct ice_pf *pf); s8 ice_ptp_request_ts(struct ice_ptp_tx *tx, struct sk_buff *skb); enum ice_tx_tstamp_work ice_ptp_process_ts(struct ice_pf *pf); -void -ice_ptp_rx_hwtstamp(struct ice_rx_ring *rx_ring, - union ice_32b_rx_flex_desc *rx_desc, struct sk_buff *skb); +u64 ice_ptp_get_rx_hwts(const union ice_32b_rx_flex_desc *rx_desc, + u64 cached_time); void ice_ptp_reset(struct ice_pf *pf); void ice_ptp_prepare_for_reset(struct ice_pf *pf); void ice_ptp_init(struct ice_pf *pf); @@ -304,9 +303,13 @@ static inline bool ice_ptp_process_ts(struct ice_pf *pf) { return true; } -static inline void -ice_ptp_rx_hwtstamp(struct ice_rx_ring *rx_ring, - union ice_32b_rx_flex_desc *rx_desc, struct sk_buff *skb) { } + +static inline u64 +ice_ptp_get_rx_hwts(const union ice_32b_rx_flex_desc *rx_desc, u64 cached_time) +{ + return 0; +} + static inline void ice_ptp_reset(struct ice_pf *pf) { } static inline void ice_ptp_prepare_for_reset(struct ice_pf *pf) { } static inline void ice_ptp_init(struct ice_pf *pf) { } diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c index 8f7f6d78f7bf..d4d27057d17b 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c @@ -185,6 +185,29 @@ ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb, ring->vsi->back->hw_csum_rx_error++; } +/** + * ice_ptp_rx_hwts_to_skb - Put RX timestamp into skb + * @rx_ring: Ring to get the VSI info + * @rx_desc: Receive descriptor + * @skb: Particular skb to send timestamp with + * + * The timestamp is in ns, so we must convert the result first. + */ +static void +ice_ptp_rx_hwts_to_skb(struct ice_rx_ring *rx_ring, + const union ice_32b_rx_flex_desc *rx_desc, + struct sk_buff *skb) +{ + u64 ts_ns, cached_time; + + cached_time = READ_ONCE(rx_ring->pkt_ctx.cached_phctime); + ts_ns = ice_ptp_get_rx_hwts(rx_desc, cached_time); + + *skb_hwtstamps(skb) = (struct skb_shared_hwtstamps){ + .hwtstamp = ns_to_ktime(ts_ns), + }; +} + /** * ice_process_skb_fields - Populate skb header fields from Rx descriptor * @rx_ring: Rx descriptor ring packet is being transacted on @@ -209,7 +232,7 @@ ice_process_skb_fields(struct ice_rx_ring *rx_ring, ice_rx_csum(rx_ring, skb, rx_desc, ptype); if (rx_ring->ptp_rx) - ice_ptp_rx_hwtstamp(rx_ring, rx_desc, skb); + ice_ptp_rx_hwts_to_skb(rx_ring, rx_desc, skb); } /**