From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vlad Zolotarov Subject: Re: [PATCH] doc: announce ABI change for rte_eth_dev structure Date: Sun, 31 Jul 2016 10:46:05 +0300 Message-ID: References: <1469024691-58750-1-git-send-email-tomaszx.kulasek@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit To: Tomasz Kulasek , dev@dpdk.org Return-path: Received: from mail-wm0-f45.google.com (mail-wm0-f45.google.com [74.125.82.45]) by dpdk.org (Postfix) with ESMTP id 7AC1C914 for ; Sun, 31 Jul 2016 09:46:08 +0200 (CEST) Received: by mail-wm0-f45.google.com with SMTP id i5so203225657wmg.0 for ; Sun, 31 Jul 2016 00:46:08 -0700 (PDT) In-Reply-To: <1469024691-58750-1-git-send-email-tomaszx.kulasek@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 07/20/2016 05:24 PM, Tomasz Kulasek wrote: > This is an ABI deprecation notice for DPDK 16.11 in librte_ether about > changes in rte_eth_dev and rte_eth_desc_lim structures. > > In 16.11, we plan to introduce rte_eth_tx_prep() function to do > necessary preparations of packet burst to be safely transmitted on > device for desired HW offloads (set/reset checksum field according to > the hardware requirements) and check HW constraints (number of segments > per packet, etc). > > While the limitations and requirements may differ for devices, it > requires to extend rte_eth_dev structure with new function pointer > "tx_pkt_prep" which can be implemented in the driver to prepare and > verify packets, in devices specific way, before burst, what should to > prevent application to send malformed packets. > > Also new fields will be introduced in rte_eth_desc_lim: nb_seg_max and > nb_mtu_seg_max, providing an information about max segments in TSO and > non TSO packets acceptable by device. > > Signed-off-by: Tomasz Kulasek Acked-by: Vlad Zolotarov > --- > doc/guides/rel_notes/deprecation.rst | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst > index f502f86..485aacb 100644 > --- a/doc/guides/rel_notes/deprecation.rst > +++ b/doc/guides/rel_notes/deprecation.rst > @@ -41,3 +41,10 @@ Deprecation Notices > * The mempool functions for single/multi producer/consumer are deprecated and > will be removed in 16.11. > It is replaced by rte_mempool_generic_get/put functions. > + > +* In 16.11 ABI changes are plained: the ``rte_eth_dev`` structure will be > + extended with new function pointer ``tx_pkt_prep`` allowing verification > + and processing of packet burst to meet HW specific requirements before > + transmit. Also new fields will be added to the ``rte_eth_desc_lim`` structure: > + ``nb_seg_max`` and ``nb_mtu_seg_max`` provideing information about number of > + segments limit to be transmitted by device for TSO/non-TSO packets.