From nobody Sun Feb 8 19:02:56 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 0C128248873; Wed, 5 Mar 2025 13:02:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741179744; cv=none; b=NKz1zUV/ESlG6N0a3fCLHNs1tGCwGlFNyyXlhVbTNRfGmjDU8rG9iECQCBYFvuKjroxpWbuTMyn9WKI3Fs9c8dSFwpL/BvCs/fLGsnEtxtEkzcgr+X3ke8wOAl4hJORSEFKuHAO3IreuE/zaY5dcThU42/DSU2zuvNFRUFbqms8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741179744; c=relaxed/simple; bh=BrHOVPMRx5IUbt2TfaXsmHGE8YIjSq6KxkHt4pHZzf0=; h=From:To:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aXneI+cJ+3JIgCs8AIp7HKyIRBIHgRO5Q4snS056LCD8AOmbS1PJkh+aAYwDThH/Z0qLwCXPUTyNUcbUh1ECQGO7TYCbvshE0fXW3mX9xWoR4a84UarqoNBcqE/FpskQZ+aWJA5fcwQcS9luS3XhcOVWOW8jS6fcZJcR2O+kwR0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=fNvOgfiF; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="fNvOgfiF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1741179744; x=1772715744; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=BrHOVPMRx5IUbt2TfaXsmHGE8YIjSq6KxkHt4pHZzf0=; b=fNvOgfiFPQgZaruMNOEcoBew5bZhoKZhWnV3+dYjGuw891PMH/mnSapQ Ix0HKwkCCPupAZldLVWv3B4GaBGsLKPvejTvCNHM2T5rx3MTUon4bbfP+ WCDOILiRdEOZBnQFBcNg6MUILsajqgTpXREbhV6OjwUGG2YZiTF/0AX3E I7/XChl48aXofQm+eGKJ7oVKVAebuT82SHz/W5OQhTVF29tz9qbtJAGaN 1gn88hFMLF9Rf4CkyBtqet2ijQEouBo9iamt3KkhZGsIoR7MXykIaN3Wa 6izDhnB21gqYCH/LfqrtMsTflLWlg+xQoHWm/7iJ0BHqiIVLsGfi+8ZkJ Q==; X-CSE-ConnectionGUID: ZdKbe75+RASfQXqxtKrqtA== X-CSE-MsgGUID: MzjNP+ZwS1awLDM0G6a58g== X-IronPort-AV: E=McAfee;i="6700,10204,11363"; a="45795236" X-IronPort-AV: E=Sophos;i="6.14,223,1736841600"; d="scan'208";a="45795236" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2025 05:02:23 -0800 X-CSE-ConnectionGUID: i6Ozl++kSluBMOfRFUTQ5g== X-CSE-MsgGUID: arsaetUXQceVXXNA1GH2IA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,223,1736841600"; d="scan'208";a="123277236" Received: from mohdfai2-ilbpg12-1.png.intel.com ([10.88.227.73]) by fmviesa005.fm.intel.com with ESMTP; 05 Mar 2025 05:02:15 -0800 From: Faizal Rahim To: Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , Simon Horman , Russell King , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Furong Xu <0x1207@gmail.com>, Russell King , Vladimir Oltean , Serge Semin , Xiaolei Wang , Suraj Jaiswal , Kory Maincent , Gal Pressman , Jesper Nilsson , Choong Yong Liang , Chwee-Lin Choong , Faizal Rahim , Kunihiko Hayashi , Vinicius Costa Gomes , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, bpf@vger.kernel.org Subject: [PATCH iwl-next v8 11/11] igc: add support to get frame preemption statistics via ethtool Date: Wed, 5 Mar 2025 08:00:26 -0500 Message-Id: <20250305130026.642219-12-faizal.abdul.rahim@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250305130026.642219-1-faizal.abdul.rahim@linux.intel.com> References: <20250305130026.642219-1-faizal.abdul.rahim@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implemented "ethtool --include-statistics --show-mm" callback for IGC. Tested preemption scenario to check preemption statistics: 1) Trigger verification handshake on both boards: $ sudo ethtool --set-mm enp1s0 pmac-enabled on $ sudo ethtool --set-mm enp1s0 tx-enabled on $ sudo ethtool --set-mm enp1s0 verify-enabled on 2) Set preemptible or express queue in taprio for tx board: $ sudo tc qdisc replace dev enp1s0 parent root handle 100 taprio \ num_tc 4 map 3 2 1 0 3 3 3 3 3 3 3 3 3 3 3 3 \ queues 1@0 1@1 1@2 1@3 base-time 0 sched-entry S F 100000 \ fp E E P P 3) Send large size packets on preemptible queue 4) Send small size packets on express queue to preempt packets in preemptible queue 5) Show preemption statistics on the receiving board: $ ethtool --include-statistics --show-mm enp1s0 MAC Merge layer state for enp1s0: pMAC enabled: on TX enabled: on TX active: on TX minimum fragment size: 64 RX minimum fragment size: 60 Verify enabled: on Verify time: 128 Max verify time: 128 Verification status: SUCCEEDED Statistics: MACMergeFrameAssErrorCount: 0 MACMergeFrameSmdErrorCount: 0 MACMergeFrameAssOkCount: 511 MACMergeFragCountRx: 764 MACMergeFragCountTx: 0 MACMergeHoldCount: 0 Co-developed-by: Vinicius Costa Gomes Signed-off-by: Vinicius Costa Gomes Co-developed-by: Chwee-Lin Choong Signed-off-by: Chwee-Lin Choong Signed-off-by: Faizal Rahim --- drivers/net/ethernet/intel/igc/igc_ethtool.c | 39 ++++++++++++++++++++ drivers/net/ethernet/intel/igc/igc_regs.h | 16 ++++++++ 2 files changed, 55 insertions(+) diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/eth= ernet/intel/igc/igc_ethtool.c index fd4b4b332309..1ed08a3fa78b 100644 --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c @@ -1819,6 +1819,44 @@ static int igc_ethtool_set_mm(struct net_device *net= dev, return igc_tsn_offload_apply(adapter); } =20 +/** + * igc_ethtool_get_frame_ass_error - Get the frame assembly error count. + * @reg_value: Register value for IGC_PRMEXCPRCNT + * Return: The count of frame assembly errors. + */ +static u64 igc_ethtool_get_frame_ass_error(u32 reg_value) +{ + u32 ooo_frame_cnt, ooo_frag_cnt; /* Out of order statistics */ + u32 miss_frame_frag_cnt; + + ooo_frame_cnt =3D FIELD_GET(IGC_PRMEXCPRCNT_OOO_FRAME_CNT, reg_value); + ooo_frag_cnt =3D FIELD_GET(IGC_PRMEXCPRCNT_OOO_FRAG_CNT, reg_value); + miss_frame_frag_cnt =3D FIELD_GET(IGC_PRMEXCPRCNT_MISS_FRAME_FRAG_CNT, re= g_value); + + return ooo_frame_cnt + ooo_frag_cnt + miss_frame_frag_cnt; +} + +static u64 igc_ethtool_get_frame_smd_error(u32 reg_value) +{ + return FIELD_GET(IGC_PRMEXCPRCNT_OOO_SMDC, reg_value); +} + +static void igc_ethtool_get_mm_stats(struct net_device *dev, + struct ethtool_mm_stats *stats) +{ + struct igc_adapter *adapter =3D netdev_priv(dev); + struct igc_hw *hw =3D &adapter->hw; + u32 reg_value; + + reg_value =3D rd32(IGC_PRMEXCPRCNT); + + stats->MACMergeFrameAssErrorCount =3D igc_ethtool_get_frame_ass_error(reg= _value); + stats->MACMergeFrameSmdErrorCount =3D igc_ethtool_get_frame_smd_error(reg= _value); + stats->MACMergeFrameAssOkCount =3D rd32(IGC_PRMPTDRCNT); + stats->MACMergeFragCountRx =3D rd32(IGC_PRMEVNTRCNT); + stats->MACMergeFragCountTx =3D rd32(IGC_PRMEVNTTCNT); +} + static int igc_ethtool_get_link_ksettings(struct net_device *netdev, struct ethtool_link_ksettings *cmd) { @@ -2116,6 +2154,7 @@ static const struct ethtool_ops igc_ethtool_ops =3D { .self_test =3D igc_ethtool_diag_test, .get_mm =3D igc_ethtool_get_mm, .set_mm =3D igc_ethtool_set_mm, + .get_mm_stats =3D igc_ethtool_get_mm_stats, }; =20 void igc_ethtool_set_ops(struct net_device *netdev) diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethern= et/intel/igc/igc_regs.h index 12ddc5793651..f343c6bfc6be 100644 --- a/drivers/net/ethernet/intel/igc/igc_regs.h +++ b/drivers/net/ethernet/intel/igc/igc_regs.h @@ -222,6 +222,22 @@ =20 #define IGC_FTQF(_n) (0x059E0 + (4 * (_n))) /* 5-tuple Queue Fltr */ =20 +/* Time sync registers - preemption statistics */ +#define IGC_PRMPTDRCNT 0x04284 /* Good RX Preempted Packets */ +#define IGC_PRMEVNTTCNT 0x04298 /* TX Preemption event counter */ +#define IGC_PRMEVNTRCNT 0x0429C /* RX Preemption event counter */ + + /* Preemption Exception Counter */ + #define IGC_PRMEXCPRCNT 0x42A0 +/* Received out of order packets with SMD-C */ +#define IGC_PRMEXCPRCNT_OOO_SMDC 0x000000FF +/* Received out of order packets with SMD-C and wrong Frame CNT */ +#define IGC_PRMEXCPRCNT_OOO_FRAME_CNT 0x0000FF00 +/* Received out of order packets with SMD-C and wrong Frag CNT */ +#define IGC_PRMEXCPRCNT_OOO_FRAG_CNT 0x00FF0000 +/* Received packets with SMD-S and wrong Frag CNT and Frame CNT */ +#define IGC_PRMEXCPRCNT_MISS_FRAME_FRAG_CNT 0xFF000000 + /* Transmit Scheduling Registers */ #define IGC_TQAVCTRL 0x3570 #define IGC_TXQCTL(_n) (0x3344 + 0x4 * (_n)) --=20 2.34.1