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 7B302469E9; Wed, 18 Jun 2025 08:46:13 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 66714427C3; Wed, 18 Jun 2025 08:45:54 +0200 (CEST) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) by mails.dpdk.org (Postfix) with ESMTP id 2D5A0427B3 for ; Wed, 18 Jun 2025 08:45:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1750229151; x=1781765151; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Y5w3N2TLKemEXGRetMVIfOcS0VDXFHY9eu5zdHrbyus=; b=nHfPn7GUqw0kzCtvbr+jQiOgFhNse2vDta2Hu7nhkzKBd/+tCa+81A+v snMSbPfhHtNWcIaPLlg1B4DhvUfJCzDiCejyGA/QuQgbGCZj6s9a4t+op xQR/1BqtPMyPM64QZGltAf/ogeZoz8v1a2k3Ux/vQobWwD/ghqyw7gRtB APQzYWOwLHDnwCJVfpcCU9U+lbIttRrIUVnSpprEA7Z+mz/AxqJlsR7P+ ir+lgueP5SBBdflnkE5ZrI1Q3bkLTm57hqB8BFY38yPejPNyucrvdgQEY 23bBM5E2BK1Vk7Pi/ckscyq7zr+90MIrVu6sBT/NfWlMwjhOeVtHZG1jW Q==; X-CSE-ConnectionGUID: l0KkNOUESPCUJg8jI7Pwqw== X-CSE-MsgGUID: CVg/Ji1tQb2V6GpPh283xw== X-IronPort-AV: E=McAfee;i="6800,10657,11467"; a="63469082" X-IronPort-AV: E=Sophos;i="6.16,245,1744095600"; d="scan'208";a="63469082" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jun 2025 23:45:51 -0700 X-CSE-ConnectionGUID: uiuq22jBQzK/gOSi4qT+Gg== X-CSE-MsgGUID: bI96pjNEQGqm3rmSsLer1Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,245,1744095600"; d="scan'208";a="150110532" Received: from unknown (HELO sprmax9..) ([10.138.182.122]) by fmviesa009.fm.intel.com with ESMTP; 17 Jun 2025 23:45:49 -0700 From: Soumyadeep Hore To: dev@dpdk.org, bruce.richardson@intel.com Cc: aman.deep.singh@intel.com, manoj.kumar.subbarao@intel.com Subject: [PATCH v7 4/4] doc: announce TxPP support for E830 adapters Date: Tue, 17 Jun 2025 22:36:14 +0000 Message-ID: <20250617223614.568996-5-soumyadeep.hore@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250617223614.568996-1-soumyadeep.hore@intel.com> References: <20250617051337.563233-5-soumyadeep.hore@intel.com> <20250617223614.568996-1-soumyadeep.hore@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 E830 adapters currently support Tx Time based queues. Signed-off-by: Soumyadeep Hore --- doc/guides/nics/ice.rst | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/doc/guides/nics/ice.rst b/doc/guides/nics/ice.rst index 77985ae5a2..fe3e87c704 100644 --- a/doc/guides/nics/ice.rst +++ b/doc/guides/nics/ice.rst @@ -415,6 +415,33 @@ and add the ``--force-max-simd-bitwidth=64`` startup parameter to disable vector examples/dpdk-ptpclient -c f -n 3 -a 0000:ec:00.1 --force-max-simd-bitwidth=64 -- -T 1 -p 0x1 -c 1 +Tx Packet Pacing +~~~~~~~~~~~~~~~~ + +In order to deliver the timestamp with every packet, +a special type of Tx Host Queue is used, the TS Queue. +This feature is currently supported only in E830 adapters. + +The tx_offload ``RTE_ETH_TX_OFFLOAD_SEND_ON_TIMESTAMP`` is used to enable the feature. +In order to deliver timestamps internally ``set txtimes`` is used, +where inter burst and intra burst time interval in nsecs is provided. +For example: + +.. code-block:: console + + dpdk-testpmd -a 0000:31:00.0 -c f -n 4 -- -i --tx-offloads=0x200000 + set fwd txonly + set txtimes , + start + +Based on the tx_offload initialised during port configuration time, +Tx Time Queue will be enabled during ice_tx_queue_setup() only for E830 adapters. +The initial time should be fetched using rte_eth_read_clock(). +Further the timestamps should be calculated based on the inter_burst and intra_burst times, +then storing it into proper format (Refer to ``struct tx_timestamp`` in tx_only.c), +as to be placed in packet header. +The timestamps should be copied to packet mbufs and manually adjust packet header length accordingly. + Generic Flow Support ~~~~~~~~~~~~~~~~~~~~ -- 2.43.0