From nobody Sun Feb 8 23:04:04 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (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 1E79822DFB9; Thu, 27 Feb 2025 14:02:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740664979; cv=none; b=YpatnJAP0lhW6/kY1W6MgpN5atVnSSd7s2l2F9OXknjTrHsq45pRUCeUeXVQDL2EBSdoq/TfaPXselnySVkNfNhK5oQJaxHA8ZG+C94z3MtRcTQtCzxcyMboZorOuRZBhqvDTh4TwUUBqgzb9WesX+Oba4/RBkN5h0jvoX7hvIc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740664979; c=relaxed/simple; bh=2Msp7YoBmanu425m0MXmljH1/c1Or8M2lkzZSA8x+50=; h=From:To:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=f4R6L9p+gPfBkG8WqZBs6HHewDRK8P44cfdVFF07NRpL88MLX0MTqumdXASb6hqrgmxWOE9pLkkhHF7ZkCMm66o8aQUDioUcsSI2R5B81oZq6+re7lql+SIGpZt/sYiV8spUjyprK1xUXXBBQ9PunLdxK1nRVqOaworv51i/vI8= 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=fKnd9KgV; arc=none smtp.client-ip=198.175.65.18 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="fKnd9KgV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1740664978; x=1772200978; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=2Msp7YoBmanu425m0MXmljH1/c1Or8M2lkzZSA8x+50=; b=fKnd9KgVgiOwklVQpFX6BpdYOc8M1InQbCeYgVscQqbtIlW57aBjmQqP 4n1AnVpQ7nClS4kxLH7gA/TLCrYDoD/c18zPm2ps9J2wIDUJM6Cj1ZaFn QTCA5t1Ig3XSexBPqWDliW5hxGeup8EseiNlPyRu6MIxscr49AIw0L5tY ifn8mHtFlaAFhI+X/QDLJMfcYHxBpK9zeOJUuu6gi720JMOLefWmlSo2p XRlW3X5b/CoziKSJKbO5qCjHyk1GKcSsYrvMh+N8YdSnV0h9Jgf4YY0VC rrdBSmN5MRakja5j68Rqz958fiJqeI2ajURueacyCPe08Q1eCfXtmeEyo g==; X-CSE-ConnectionGUID: 1Xpr0WuaRoWTRK+DfxRgMA== X-CSE-MsgGUID: ZU4MyIWeTsKLTjWiRXQfFA== X-IronPort-AV: E=McAfee;i="6700,10204,11314"; a="41752366" X-IronPort-AV: E=Sophos;i="6.12,310,1728975600"; d="scan'208";a="41752366" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2025 06:02:57 -0800 X-CSE-ConnectionGUID: UnMvmEi2QmWQ5xMolcf1/A== X-CSE-MsgGUID: VkTmaFqeTsqlGt0eqbsrPQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,319,1732608000"; d="scan'208";a="122149579" Received: from mohdfai2-ilbpg12-1.png.intel.com ([10.88.227.73]) by fmviesa004.fm.intel.com with ESMTP; 27 Feb 2025 06:02:49 -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 , Andrew Halaney , Choong Yong Liang , 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 v6 4/9] igc: Set the RX packet buffer size for TSN mode Date: Thu, 27 Feb 2025 09:01:52 -0500 Message-Id: <20250227140158.2129988-5-faizal.abdul.rahim@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250227140158.2129988-1-faizal.abdul.rahim@linux.intel.com> References: <20250227140158.2129988-1-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