From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id A2C28A0597; Thu, 9 Apr 2020 17:51:04 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id EC9B31D14E; Thu, 9 Apr 2020 17:51:03 +0200 (CEST) Received: from git-send-mailer.rdmz.labs.mlnx (unknown [37.142.13.130]) by dpdk.org (Postfix) with ESMTP id BEFA51C437 for ; Thu, 9 Apr 2020 17:51:02 +0200 (CEST) From: Bing Zhao To: john.mcnamara@intel.com, marko.kovacevic@intel.com, viacheslavo@mellanox.com, matan@mellanox.com Cc: shahafs@mellanox.com, rasland@mellanox.com, dev@dpdk.org Date: Thu, 9 Apr 2020 23:50:57 +0800 Message-Id: <1586447457-284912-1-git-send-email-bingz@mellanox.com> X-Mailer: git-send-email 2.5.5 Subject: [dpdk-dev] [PATCH] doc: update hairpin data buffer size config X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch updates the MLX5 PMD and release notes documentations. Adding the guideline for hairpin data buffer size configuration. Signed-off-by: Bing Zhao --- doc/guides/nics/mlx5.rst | 11 +++++++++++ doc/guides/rel_notes/release_20_05.rst | 1 + 2 files changed, 12 insertions(+) diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst index e13c07d..c3cde30 100644 --- a/doc/guides/nics/mlx5.rst +++ b/doc/guides/nics/mlx5.rst @@ -99,6 +99,7 @@ Features - Support for multiple rte_flow groups. - Per packet no-inline hint flag to disable packet data copying into Tx descriptors. - Hardware LRO. +- Hairpin. Limitations ----------- @@ -773,6 +774,16 @@ Run-time configuration If this parameter is not specified, by default PMD will set the smallest value supported by HW. +- ``hp_buf_log_sz`` parameter [int] + + The total data buffer size of a hairpin queue (logarithmic form), in bytes. + PMD will set the data buffer size to 2 ** ``hp_buf_log_sz``, both for RX & TX. + The capacity of the value is sepcified by the Firmware, and the initialization + will get a failure if it is out of scope. + A larger value is needed to support larger frame. + If this parameter is not specified, by default PMD will set it to 16 and 9KB + jumbo frames are supported. + .. _mlx5_firmware_config: Firmware configuration diff --git a/doc/guides/rel_notes/release_20_05.rst b/doc/guides/rel_notes/release_20_05.rst index 2596269..7128f26 100644 --- a/doc/guides/rel_notes/release_20_05.rst +++ b/doc/guides/rel_notes/release_20_05.rst @@ -62,6 +62,7 @@ New Features * Added support for matching on IPv4 Time To Live and IPv6 Hop Limit. * Added support for creating Relaxed Ordering Memory Regions. + * Added support for configuring Haripin queue data buffer size. * **Updated the Intel ice driver.** -- 2.5.5