From nobody Sun Feb 8 16:24:19 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 04E8C1DF247; Mon, 28 Apr 2025 06:03:48 +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=1745820230; cv=none; b=QdwSBbMPn49JevLjMY+b9/Meh4gbomDS3eEsmkccNgipqsaFQr8dofzcl1AG4LQNbys3db/0GmRN5X6yb6DtQLJKGfiGiZa7m1xuzjXJyxTA+BPajl4UQZJgMeOrfJGTGTjdH+ttHM4naKstgRXhSTI8vhSfI8iCQ0jMjj21vfw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745820230; c=relaxed/simple; bh=MOwqhJoT14poSfgYv5P8L6wv7hHxXBT7mgCaHursR+w=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mUo/yckm8DeRTTE1kkqoECeaNwDlpAp8WHnE1KfIgS/dj8HOwyeyga17gfoN35htnIcKoI/+CcMDVX210nZBAS53V9KDpWSSmDEGp2+SeLCdHaHdpe1KyixOgngvIZ7Hr5szAE4huhCy0P/Rev1F3LFVyWw6RnpT4C0s5dsLiKQ= 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=mUj8jtOV; 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="mUj8jtOV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1745820230; x=1777356230; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MOwqhJoT14poSfgYv5P8L6wv7hHxXBT7mgCaHursR+w=; b=mUj8jtOVBCI7Qru/7j2+YsGXHQyKEorsHDnL80aanqlu2oZIAYNUxi2E I28osuwa+y3fYhRw9H4rq6Cft+/yzGQAofO7cVitYhOJci6P5mM2OW3TE 0F57Gm7WZ/4LaC6yL9pRPyil694x+DZppaTsQR6Sdc6hiWP5Nkm2sLY0+ 7S5jlX80BymwIDzwFiRSeZaDgYxDINu1Pz3bVLA0gFD3eEU5HUYV0Zra/ TGyX2crd8gSicJ1Xmkui5pbOWhMUOIP74UaewrKPcdnbutJvfzOf+JU2Q QN6UeZY7Boup2NQ9oUsX8kinw0vNbLYpKWM+Til7P5qsIm/+2D+jr1zNL g==; X-CSE-ConnectionGUID: mPQrC9usT4GNTjiWUvpEeA== X-CSE-MsgGUID: 0ybPELGTSaG14HsOvKCRkw== X-IronPort-AV: E=McAfee;i="6700,10204,11416"; a="51064657" X-IronPort-AV: E=Sophos;i="6.15,245,1739865600"; d="scan'208";a="51064657" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Apr 2025 23:03:49 -0700 X-CSE-ConnectionGUID: F7tjRAGxQDiikAtPK2RcmA== X-CSE-MsgGUID: y568pPn3TvKc3yU2DWeY7w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,245,1739865600"; d="scan'208";a="133340843" Received: from mohdfai2-ilbpg12-1.png.intel.com ([10.88.227.73]) by orviesa006.jf.intel.com with ESMTP; 27 Apr 2025 23:03:45 -0700 From: Faizal Rahim To: Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vladimir Oltean Cc: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Faizal Rahim , Chwee-Lin Choong Subject: [PATCH iwl-next v1 7/8] igc: add preemptible queue support in mqprio Date: Mon, 28 Apr 2025 02:02:24 -0400 Message-Id: <20250428060225.1306986-8-faizal.abdul.rahim@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250428060225.1306986-1-faizal.abdul.rahim@linux.intel.com> References: <20250428060225.1306986-1-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" igc already supports enabling MAC Merge for FPE. This patch adds support for preemptible queues in mqprio. Tested preemption with mqprio by: 1. Enable FPE: ethtool --set-mm enp1s0 pmac-enabled on tx-enabled on verify-enabled on 2. Enable preemptible queue in mqprio: mqprio num_tc 4 map 0 1 2 3 0 0 0 0 0 0 0 0 0 0 0 0 \ queues 1@0 1@1 1@2 1@3 \ fp P P P E Signed-off-by: Faizal Rahim --- drivers/net/ethernet/intel/igc/igc_main.c | 9 ++------- drivers/net/ethernet/intel/igc/igc_tsn.c | 9 +++++++++ drivers/net/ethernet/intel/igc/igc_tsn.h | 1 + 3 files changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethern= et/intel/igc/igc_main.c index c6e2cfd630df..6b14b0d165f0 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -6755,6 +6755,7 @@ static int igc_tsn_enable_mqprio(struct igc_adapter *= adapter, =20 if (!mqprio->qopt.num_tc) { adapter->strict_priority_enable =3D false; + igc_fpe_clear_preempt_queue(adapter); netdev_reset_tc(adapter->netdev); goto apply; } @@ -6782,13 +6783,6 @@ static int igc_tsn_enable_mqprio(struct igc_adapter = *adapter, return -EOPNOTSUPP; } =20 - /* Preemption is not supported yet. */ - if (mqprio->preemptible_tcs) { - NL_SET_ERR_MSG_MOD(mqprio->extack, - "Preemption is not supported yet"); - return -EOPNOTSUPP; - } - igc_save_mqprio_params(adapter, mqprio->qopt.num_tc, mqprio->qopt.offset); =20 @@ -6808,6 +6802,7 @@ static int igc_tsn_enable_mqprio(struct igc_adapter *= adapter, adapter->queue_per_tc[i] =3D i; =20 mqprio->qopt.hw =3D TC_MQPRIO_HW_OFFLOAD_TCS; + igc_fpe_save_preempt_queue(adapter, mqprio); =20 apply: return igc_tsn_offload_apply(adapter); diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/etherne= t/intel/igc/igc_tsn.c index 897813eb2175..9dd45c6252bf 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.c +++ b/drivers/net/ethernet/intel/igc/igc_tsn.c @@ -159,6 +159,15 @@ void igc_fpe_init(struct igc_adapter *adapter) ethtool_mmsv_init(&adapter->fpe.mmsv, adapter->netdev, &igc_mmsv_ops); } =20 +void igc_fpe_clear_preempt_queue(struct igc_adapter *adapter) +{ + for (int i =3D 0; i < adapter->num_tx_queues; i++) { + struct igc_ring *tx_ring =3D adapter->tx_ring[i]; + + tx_ring->preemptible =3D false; + } +} + static u32 igc_fpe_map_preempt_tc_to_queue(const struct igc_adapter *adapt= er, unsigned long preemptible_tcs) { diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.h b/drivers/net/etherne= t/intel/igc/igc_tsn.h index f2e8bfef4871..a95b893459d7 100644 --- a/drivers/net/ethernet/intel/igc/igc_tsn.h +++ b/drivers/net/ethernet/intel/igc/igc_tsn.h @@ -17,6 +17,7 @@ enum igc_txd_popts_type { DECLARE_STATIC_KEY_FALSE(igc_fpe_enabled); =20 void igc_fpe_init(struct igc_adapter *adapter); +void igc_fpe_clear_preempt_queue(struct igc_adapter *adapter); void igc_fpe_save_preempt_queue(struct igc_adapter *adapter, const struct tc_mqprio_qopt_offload *mqprio); u32 igc_fpe_get_supported_frag_size(u32 frag_size); --=20 2.34.1