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 B8E2EE7E0BC for ; Mon, 9 Feb 2026 16:48:29 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 3212940E32; Mon, 9 Feb 2026 17:46:14 +0100 (CET) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) by mails.dpdk.org (Postfix) with ESMTP id 34C4240DDE for ; Mon, 9 Feb 2026 17:46:08 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1770655568; x=1802191568; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hrOMDlzO+hPgFxXb0HIzKPIuXkcWqy0keP40MP9oLpw=; b=HX1/YeoigUD4yEOcabUIDeeYVl2FKK7xxsRgPLWrRIsVzK3Y4uq8pVZF G+McdjILY6B7Gk/XFo5ISVAtJSsB/Eysk/MAFSYSSOOWXPDLbHplclFk/ EQsVW8msecE/xbLwvmZdoGd14w9MAkhGaKZFQp7NM8RHvOx7vBJWdV/VC pnncD5SKevtJ3dMRiUqJovrBVq7fQQybvf7OZ2suFvlbfvkLs9sRS2zZU 4UfsJyOH1PGQQmHsu7g7rHDR1aVMiMfbKmleVafX2SCaShn7xEaNbcSKp uIMPiu/UdmYtXBTWDYzgn9mDN4tRXpsMzS99Ax6RoyzbG/Sbpl8ZeaLpR Q==; X-CSE-ConnectionGUID: AtC8063bRJeSErRbiN1Gcw== X-CSE-MsgGUID: DctW9MQwSlaaOUeim3vwsQ== X-IronPort-AV: E=McAfee;i="6800,10657,11696"; a="71663476" X-IronPort-AV: E=Sophos;i="6.21,282,1763452800"; d="scan'208";a="71663476" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Feb 2026 08:46:08 -0800 X-CSE-ConnectionGUID: jb7RxUCzQ6WmUq0xdWkVXg== X-CSE-MsgGUID: 1kteBbO6SwiRE4kj9/vJRA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,282,1763452800"; d="scan'208";a="210789176" Received: from silpixa00401385.ir.intel.com ([10.20.224.226]) by fmviesa006.fm.intel.com with ESMTP; 09 Feb 2026 08:46:07 -0800 From: Bruce Richardson To: dev@dpdk.org Cc: Bruce Richardson Subject: [PATCH v4 23/35] net/intel: add special handling for single desc packets Date: Mon, 9 Feb 2026 16:45:21 +0000 Message-ID: <20260209164538.1428499-24-bruce.richardson@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260209164538.1428499-1-bruce.richardson@intel.com> References: <20251219172548.2660777-1-bruce.richardson@intel.com> <20260209164538.1428499-1-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.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/net/intel/common/tx_scalar.h b/drivers/net/intel/common/tx_scalar.h index cee8f11c7f..342e271c5f 100644 --- a/drivers/net/intel/common/tx_scalar.h +++ b/drivers/net/intel/common/tx_scalar.h @@ -298,6 +298,31 @@ 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]); @@ -389,6 +414,7 @@ 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