From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FAC7D2F32A for ; Tue, 13 Jan 2026 15:18:44 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 9F30840E13; Tue, 13 Jan 2026 16:15:47 +0100 (CET) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) by mails.dpdk.org (Postfix) with ESMTP id 3E29B40DD0 for ; Tue, 13 Jan 2026 16:15:43 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768317344; x=1799853344; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=byIQ0SKQ95zddIbuv61jsbMkvUvWKC8KELTU7ukihj0=; b=LquahDjd6Tf5u+rjfyUzgqOuP7HyJxrzzqBBYz0foZn+nDyod3xvVusD 242OvDCyKAXZmycWheyBhoYHLk/0DOf316fZCsh8r3CeGe+Nfw8ACBTVf xxIJnKOIbuJLhnDcRdByGFbnkNeZwktOk6d1fxi94Kfj0rwh5FDnROMVr Fcu61uOI6oE9rXKcNbyXchmQia/Ng64TY4wWmzF3CkyuRmUyWdKt3UGAM N0bjaH0+Yw8udrRC1DDdSx4DkS0VfrNwsudO8oipIFSRCbDkJYMalI2Ot hDqT1g8EmQ6ou+xR6mgW7Bl6mDK4CiprdRnBPvNcUTJporxFlAW695CKG A==; X-CSE-ConnectionGUID: sVaWA1aORWiiU455NTVADQ== X-CSE-MsgGUID: n4hrC6xhRtKkWkOTnn+4RQ== X-IronPort-AV: E=McAfee;i="6800,10657,11670"; a="80969210" X-IronPort-AV: E=Sophos;i="6.21,222,1763452800"; d="scan'208";a="80969210" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jan 2026 07:15:43 -0800 X-CSE-ConnectionGUID: 6PBhN6r2QCCRs7NDNYsu2w== X-CSE-MsgGUID: lFOHBVxKTzmBKj5lsJrSGQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,222,1763452800"; d="scan'208";a="203556643" Received: from silpixa00401385.ir.intel.com ([10.20.224.226]) by orviesa006.jf.intel.com with ESMTP; 13 Jan 2026 07:15:42 -0800 From: Bruce Richardson To: dev@dpdk.org Cc: Bruce Richardson Subject: [PATCH v2 24/36] net/intel: add special handling for single desc packets Date: Tue, 13 Jan 2026 15:14:48 +0000 Message-ID: <20260113151505.1871271-25-bruce.richardson@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260113151505.1871271-1-bruce.richardson@intel.com> References: <20251219172548.2660777-1-bruce.richardson@intel.com> <20260113151505.1871271-1-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 | 26 ++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/net/intel/common/tx_scalar_fns.h b/drivers/net/intel/common/tx_scalar_fns.h index 58196dc02a..3772cb4c3c 100644 --- a/drivers/net/intel/common/tx_scalar_fns.h +++ b/drivers/net/intel/common/tx_scalar_fns.h @@ -304,6 +304,31 @@ 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 +420,7 @@ 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