From nobody Sun Feb 8 17:21:56 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 836DB24A062; Wed, 5 Mar 2025 13:01:45 +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=1741179707; cv=none; b=qYXfokPo0dYEb9i0TdkIixZyrJJgUriI+X/eJxlni0Y3BTD0nGnAHY9N95lC7C4G9cDuDqBBf57/pQdpODy7M8tGX0qZvv2hpRbrxZIQ908YzxKRCdtL/Sxw9xYia75XH3DlflJpN1KBFo2+ZR+6+bs1TgQJFZV04aombDzQzT8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741179707; c=relaxed/simple; bh=2Msp7YoBmanu425m0MXmljH1/c1Or8M2lkzZSA8x+50=; h=From:To:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Z/aljEX0rx9tbLX3EwqiQwhPvSXoFRG0D+c2DsKd7QMOfD0NPV22zFrHRslxWb410658DEoKSjtfZsFLEzz96xbjuOv49ptN1CdFseU7x+NSysrykBT5Nnna2mLPx6OfnJoqcj63lytc5tfXzHhdpXPGGJO3EXJiEIBGJO6bI5I= 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=dgVm38Bv; 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="dgVm38Bv" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1741179706; x=1772715706; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=2Msp7YoBmanu425m0MXmljH1/c1Or8M2lkzZSA8x+50=; b=dgVm38BvQzllclLMYfQ9tG+6JkeVvxdDZxCn8ls/KWnoNQLEQii7sRDo G3QFZr4mY9LC+KcIh5RmzLJVB/Pb8zM5IWZe3TPD5+TrcHOcn+PFAEJ2s FFJHLGAb9Kyf5MyCulo6Kg4ub/Uvey6LbzddbWsEpbxf+8kNdDWPqlYwq Ml3e1PAXS1mFIic5Lu76PsfNqnlW3hdoxBEJIEjkJg2QRdsMb4Zahj2KI OnzXHAhAS8CqPjxLWBnm6cPzecAGgyhbOsj5plcBoe5SQbZKayPzH4dYg BxdSVeldo0lG5oAtmCTQvalX8hp+YfSQ3/xSoY/XPD0RUnhX9zvUuaco+ Q==; X-CSE-ConnectionGUID: fGKqcv9mQCma4fAKM4qC+Q== X-CSE-MsgGUID: rajMyYgUT9ee8BBj6JxmAQ== X-IronPort-AV: E=McAfee;i="6700,10204,11363"; a="45795056" X-IronPort-AV: E=Sophos;i="6.14,223,1736841600"; d="scan'208";a="45795056" 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 05:01:46 -0800 X-CSE-ConnectionGUID: xQgVjQU7RRCRvWCDSeerzQ== X-CSE-MsgGUID: TF0vvx1aSsaNv7LIwQ9VCg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,223,1736841600"; d="scan'208";a="123277066" Received: from mohdfai2-ilbpg12-1.png.intel.com ([10.88.227.73]) by fmviesa005.fm.intel.com with ESMTP; 05 Mar 2025 05:01:38 -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 06/11] igc: set the RX packet buffer size for TSN mode Date: Wed, 5 Mar 2025 08:00:21 -0500 Message-Id: <20250305130026.642219-7-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" In preparation for supporting frame preemption, when entering TSN mode set the receive packet buffer to 16KB for the Express MAC, 16KB for the Preemptible MAC and 2KB for the BMC, according to the datasheet section 7.1.3.2. Co-developed-by: Vinicius Costa Gomes Signed-off-by: Vinicius Costa Gomes Signed-off-by: Faizal Rahim --- drivers/net/ethernet/intel/igc/igc_defines.h | 3 +++ drivers/net/ethernet/intel/igc/igc_tsn.c | 13 +++++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/eth= ernet/intel/igc/igc_defines.h index 516ef70c98e9..b19ac6f30dac 100644 --- a/drivers/net/ethernet/intel/igc/igc_defines.h +++ b/drivers/net/ethernet/intel/igc/igc_defines.h @@ -402,6 +402,9 @@ =20 /* 7KB bytes buffer for each tx queue (total 4 queues) + 4KB for BMC*/ #define IGC_TXPBSIZE_TSN 0x041c71c7 +/* 15KB for EXP + 15KB for BE + 2KB for BMC */ +#define IGC_RXPBSIZE_TSN 0x0000f08f +#define IGC_RXPBSIZE_SIZE_MASK 0x0001FFFF =20 #define IGC_DTXMXPKTSZ_TSN 0x19 /* 1600 bytes of max TX DMA packet size */ #define IGC_DTXMXPKTSZ_DEFAULT 0x98 /* 9728-byte Jumbo frames */ diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/etherne= t/intel/igc/igc_tsn.c index 1e44374ca1ff..f0213cfce07d 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -132,13 +132,17 @@ static int igc_tsn_disable_offload(struct igc_adapter= *adapter) { u16 queue_per_tc[4] =3D { 3, 2, 1, 0 }; struct igc_hw *hw =3D &adapter->hw; - u32 tqavctrl; + u32 tqavctrl, rxpbs; int i; =20 wr32(IGC_GTXOFFSET, 0); wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT); wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_DEFAULT); =20 + rxpbs =3D rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; + rxpbs |=3D I225_RXPBSIZE_DEFAULT; + wr32(IGC_RXPBS, rxpbs); + if (igc_is_device_id_i226(hw)) igc_tsn_restore_retx_default(adapter); =20 @@ -194,7 +198,7 @@ static int igc_tsn_enable_offload(struct igc_adapter *a= dapter) { struct igc_hw *hw =3D &adapter->hw; u32 tqavctrl, baset_l, baset_h; - u32 sec, nsec, cycle; + u32 sec, nsec, cycle, rxpbs; ktime_t base_time, systim; int i; =20 @@ -202,6 +206,11 @@ static int igc_tsn_enable_offload(struct igc_adapter *= adapter) wr32(IGC_DTXMXPKTSZ, IGC_DTXMXPKTSZ_TSN); wr32(IGC_TXPBS, IGC_TXPBSIZE_TSN); =20 + rxpbs =3D rd32(IGC_RXPBS) & ~IGC_RXPBSIZE_SIZE_MASK; + rxpbs |=3D IGC_RXPBSIZE_TSN; + + wr32(IGC_RXPBS, rxpbs); + if (igc_is_device_id_i226(hw)) igc_tsn_set_retx_qbvfullthreshold(adapter); =20 --=20 2.34.1