From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) (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 C677333D50E; Tue, 3 Feb 2026 11:21:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770117716; cv=none; b=oifnlnhgt3F/QJgP2SrBUbRcbTtspgsvo18lnBMREMrjs2aqmhnvediHY+P769UGv2qDf9TJiBOgTFgz31GmXzT9PZNvgD5/Kvq60ZrRIbZ1fAmi0JX9m2IYcDuBaowHOTdrnRX9WdREHET2Rb/oMTzj/EoGmdfn25O/EHhw+Bs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770117716; c=relaxed/simple; bh=w2laI/1xWTN2MQd5zfvU/4r5OmrtUd+BSNajThb98Gs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u/tZH0KGEEr9f4e8+YQ8griwkuzE9hYqN9ElK1SHQvpm2W3Ta3FomXloSzHCB0+Ru51EwcQHtedNOuHrMgaCAhj8tCxbnswFNkH+b5/bwAIKOsZIEX6HZVGADZxtCswQv07oSDdWh/jsRqi/ZzrTk4BNI0iCkCb9Qtp384rQ81U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=KRua5UrN; arc=none smtp.client-ip=198.175.65.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="KRua5UrN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1770117716; x=1801653716; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=w2laI/1xWTN2MQd5zfvU/4r5OmrtUd+BSNajThb98Gs=; b=KRua5UrN4sBlMCEprESYiygEGZYkOKIqj49GmA687+ZdxPlYkPfqwHqL TbHcSL1Pic3Xw+E+6Po08VQzr8PYbEU/ofUScNOc3E+xl+cWlz/wOjE+H Yo0wvWQrxgsBs9k60dnQhI6EtSQNTkE7yr0vYx/gbH8t623XFPgIoy1x6 bY1X0WJGJ/E9M29OiqZzoFROa6fTpW/Nbxh9+4p7p6kSIGDuiahypMpWJ u8YFEAkO/scezpw4RmNSL3pikj8SphnoOk2iXQudTsM8dNrYqt+ppjFLS IQiu4JBZnuYrTTC/fZhKWKuVnSoZ8ejlqbwNBWpDEUI6k70o9/qhMHJ4o A==; X-CSE-ConnectionGUID: otBvkN05SyawPDGazbLxzw== X-CSE-MsgGUID: +UWff1WiRRyc9uM25//MeQ== X-IronPort-AV: E=McAfee;i="6800,10657,11690"; a="71185898" X-IronPort-AV: E=Sophos;i="6.21,270,1763452800"; d="scan'208";a="71185898" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Feb 2026 03:21:55 -0800 X-CSE-ConnectionGUID: p/mtr53nRW6E40VGjLXJkw== X-CSE-MsgGUID: UmtALSepRCmNsZNjjBRjJw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,270,1763452800"; d="scan'208";a="209913265" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by orviesa007.jf.intel.com with ESMTP; 03 Feb 2026 03:21:46 -0800 Received: from lincoln.igk.intel.com (lincoln.igk.intel.com [10.102.21.235]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 367042819A; Tue, 3 Feb 2026 11:21:43 +0000 (GMT) From: Larysa Zaremba To: bpf@vger.kernel.org Cc: Claudiu Manoil , Vladimir Oltean , Wei Fang , Clark Wang , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Tony Nguyen , Przemek Kitszel , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Simon Horman , Shuah Khan , Alexander Lobakin , Maciej Fijalkowski , "Bastien Curutchet (eBPF Foundation)" , Larysa Zaremba , Tushar Vyavahare , Jason Xing , =?UTF-8?q?Ricardo=20B=2E=20Marli=C3=A8re?= , Eelco Chaudron , Lorenzo Bianconi , Toke Hoiland-Jorgensen , imx@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kselftest@vger.kernel.org, Aleksandr Loktionov Subject: [PATCH bpf 4/6] i40e: use truesize as XDP RxQ info frag_size Date: Tue, 3 Feb 2026 11:53:32 +0100 Message-ID: <20260203105417.2302672-5-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260203105417.2302672-1-larysa.zaremba@intel.com> References: <20260203105417.2302672-1-larysa.zaremba@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The only user of frag_size field in XDP RxQ info is bpf_xdp_frags_increase_tail(). It clearly expects truesize instead of DMA write size. Different assumptions in i40e driver configuration lead to negative tailroom. Set frag_size to the same value as frame_sz. Fixes: a045d2f2d03d ("i40e: set xdp_rxq_info::frag_size") Reviewed-by: Aleksandr Loktionov Signed-off-by: Larysa Zaremba --- drivers/net/ethernet/intel/i40e/i40e_main.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 0b1cc0481027..72a33aa3e1f3 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -3561,6 +3561,7 @@ static int i40e_configure_rx_ring(struct i40e_ring *ring) struct i40e_vsi *vsi = ring->vsi; u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len; u16 pf_q = vsi->base_queue + ring->queue_index; + u32 truesize = i40e_rx_pg_size(ring) / 2; struct i40e_hw *hw = &vsi->back->hw; struct i40e_hmc_obj_rxq rx_ctx; int err = 0; @@ -3581,7 +3582,7 @@ static int i40e_configure_rx_ring(struct i40e_ring *ring) err = __xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev, ring->queue_index, ring->q_vector->napi.napi_id, - ring->rx_buf_len); + truesize); if (err) return err; } @@ -3614,7 +3615,7 @@ static int i40e_configure_rx_ring(struct i40e_ring *ring) } skip: - xdp_init_buff(&ring->xdp, i40e_rx_pg_size(ring) / 2, &ring->xdp_rxq); + xdp_init_buff(&ring->xdp, truesize, &ring->xdp_rxq); rx_ctx.dbuff = DIV_ROUND_UP(ring->rx_buf_len, BIT_ULL(I40E_RXQ_CTX_DBUFF_SHIFT)); -- 2.52.0