From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 00BCA47091; Fri, 19 Dec 2025 18:28:42 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 9548E40BA2; Fri, 19 Dec 2025 18:26:42 +0100 (CET) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) by mails.dpdk.org (Postfix) with ESMTP id 914FC40A79 for ; Fri, 19 Dec 2025 18:26:38 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1766165199; x=1797701199; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=iRw/YXotiO5TUGJePT67kuUrghf0gEiylNOCuV5tDPg=; b=aIo6S5KOo383pDULL8Rt0X3w4SjYXhYlLyCyPBvEc5Trl0eZbxnh9Ei+ zlQ6Rq9Z8DqImV1idoSS1B145iN/MjHj91L6uOXwo89+ixfII/ZImnfhh VeTyYIejRahfJf7DQ2HAkosN3UWIHjpa7UJfL8lUq8HwDWAW0vgZE28zS J70SVE7NGl714dVFjpiuH3+Q9TTe98Xk7S4b8p8myhZlfpA2jpNl3uPx5 xtHqltHyBgKI7ytIezIx8aDjpiabVyXODySP7vLJEFkCRR+qjD+cQhR+M DixD0QI/ujsePMOhOaUDpm10julfWrOsC9rxLDmEHr+ojWX5mX0i+MCqE g==; X-CSE-ConnectionGUID: gpVtOpPyQC+j1/euyfry2w== X-CSE-MsgGUID: SQw3qf6YS42qF9lQeLjqLA== X-IronPort-AV: E=McAfee;i="6800,10657,11647"; a="71759515" X-IronPort-AV: E=Sophos;i="6.21,161,1763452800"; d="scan'208";a="71759515" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Dec 2025 09:26:38 -0800 X-CSE-ConnectionGUID: l7om2716Re2dHr5DD2TchQ== X-CSE-MsgGUID: sp9XXqokTCel97TxQjo2lQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,161,1763452800"; d="scan'208";a="198170517" Received: from silpixa00401385.ir.intel.com ([10.20.224.226]) by orviesa010.jf.intel.com with ESMTP; 19 Dec 2025 09:26:37 -0800 From: Bruce Richardson To: dev@dpdk.org Cc: Bruce Richardson Subject: [RFC PATCH 23/27] net/intel: add special handling for single desc packets Date: Fri, 19 Dec 2025 17:25:40 +0000 Message-ID: <20251219172548.2660777-24-bruce.richardson@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251219172548.2660777-1-bruce.richardson@intel.com> References: <20251219172548.2660777-1-bruce.richardson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Within the scalar packets, add a shortcut path for packets that don't use TSO and have only a single data descriptor. Signed-off-by: Bruce Richardson --- drivers/net/intel/common/tx_scalar_fns.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/net/intel/common/tx_scalar_fns.h b/drivers/net/intel/common/tx_scalar_fns.h index 27791cf138..55502b46ed 100644 --- a/drivers/net/intel/common/tx_scalar_fns.h +++ b/drivers/net/intel/common/tx_scalar_fns.h @@ -304,6 +304,28 @@ ci_xmit_pkts(struct ci_tx_queue *txq, ci_txd_enable_checksum(ol_flags, &td_cmd, &td_offset, tx_offload); + /* special case for single descriptor packet, without TSO offload */ + if (nb_used == 1 && (ol_flags & (RTE_MBUF_F_TX_TCP_SEG | RTE_MBUF_F_TX_UDP_SEG)) == 0) { + txd = &ci_tx_ring[tx_id]; + tx_id = txe->next_id; + + if (txe->mbuf) + rte_pktmbuf_free_seg(txe->mbuf); + *txe = (struct ci_tx_entry){ .mbuf = tx_pkt, .last_id = tx_last, .next_id = tx_id }; + + /* Setup TX Descriptor */ + td_cmd |= CI_TX_DESC_CMD_EOP; + const uint64_t cmd_type_offset_bsz = CI_TX_DESC_DTYPE_DATA | + ((uint64_t)td_cmd << CI_TXD_QW1_CMD_S) | + ((uint64_t)td_offset << CI_TXD_QW1_OFFSET_S) | + ((uint64_t)tx_pkt->data_len << CI_TXD_QW1_TX_BUF_SZ_S) | + ((uint64_t)td_tag << CI_TXD_QW1_L2TAG1_S); + write_txd(txd, rte_mbuf_data_iova(tx_pkt), cmd_type_offset_bsz); + + txe = &sw_ring[tx_id]; + goto end_pkt; + } + if (nb_ctx) { /* Setup TX context descriptor if required */ uint64_t *ctx_txd = RTE_CAST_PTR(uint64_t *, &ci_tx_ring[tx_id]); @@ -395,6 +417,7 @@ ci_xmit_pkts(struct ci_tx_queue *txq, txe = txn; m_seg = m_seg->next; } while (m_seg); +end_pkt: txq->nb_tx_used = (uint16_t)(txq->nb_tx_used + nb_used); txq->nb_tx_free = (uint16_t)(txq->nb_tx_free - nb_used); -- 2.51.0