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From: "Kinsella, Ray" <mdr@ashroe.eu>
To: Ferruh Yigit <ferruh.yigit@intel.com>,
	Neil Horman <nhorman@tuxdriver.com>
Cc: dev@dpdk.org, Thomas Monjalon <thomas@monjalon.net>,
	Andrew Rybchenko <arybchenko@solarflare.com>,
	Konstantin Ananyev <konstantin.ananyev@intel.com>,
	Matan Azrad <matan@nvidia.com>,
	Olivier Matz <olivier.matz@6wind.com>,
	Jerin Jacob <jerinj@marvell.com>
Subject: Re: [dpdk-dev] [RFC] doc: announce max Rx packet len field deprecation
Date: Wed, 21 Oct 2020 13:40:50 +0100
Message-ID: <45202948-1e69-266b-c218-2d777545b7b4@ashroe.eu> (raw)
In-Reply-To: <20201020120305.1516513-1-ferruh.yigit@intel.com>



On 20/10/2020 13:03, Ferruh Yigit wrote:
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
> ---
> Cc: Thomas Monjalon <thomas@monjalon.net>
> Cc: Andrew Rybchenko <arybchenko@solarflare.com>
> Cc: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Cc: Matan Azrad <matan@nvidia.com>
> Cc: Olivier Matz <olivier.matz@6wind.com>
> Cc: Jerin Jacob <jerinj@marvell.com>
> ---
>  doc/guides/rel_notes/deprecation.rst | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> index 8ceb385141..d4a31392d3 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -149,6 +149,31 @@ Deprecation Notices
>    will be limited to maximum 256 queues.
>    Also compile time flag ``RTE_ETHDEV_QUEUE_STAT_CNTRS`` will be removed.
>  
> +* ethdev: In ``struct rte_eth_rxmode``, ``uint32_t max_rx_pkt_len`` will be
> +  replaced by a new ``uint32_t mtu`` in v21.11.
> +  The new ``mtu`` field will be used to configure the initial device MTU via
> +  ``rte_eth_dev_configure()`` API.
> +  Later MTU can be changed by ``rte_eth_dev_set_mtu()`` API as done now.
> +  The existing ``(struct rte_eth_dev)->data->mtu`` variable will be used to store
> +  the configured ``mtu`` value,
> +  and this new ``(struct rte_eth_dev)->data->dev_conf.rxmode.mtu`` variable will
> +  be used to store the user configuration request.
> +  Unlike ``max_rx_pkt_len``, which was valid only when ``JUMBO_FRAME`` enabled,
> +  ``mtu`` field will be always valid.
> +  When ``mtu`` config is not provided by the application, default ``RTE_ETHER_MTU``
> +  value will be used.
> +  Driver is responsible from updating ``(struct rte_eth_dev)->data->mtu`` after MTU
> +  set successfully, either by ``rte_eth_dev_configure()`` or ``rte_eth_dev_set_mtu()``.
> +
> +  Application may need to configure device for a specific Rx packet size, like for

An application ... 

> +  cases ``DEV_RX_OFFLOAD_SCATTER`` is not supported and device received packet size
> +  can't be bigger than Rx buffer size.
> +  To cover these cases application needs to know the device packet overhead to be

An application ... 

> +  able to calculate the ``mtu`` corresponding to a Rx buffer size, for this
> +  ``(struct rte_eth_dev_info).max_rx_pktlen`` will be kept,
> +  the device packet overhead can be calculated as:
> +  ``(struct rte_eth_dev_info).max_rx_pktlen - (struct rte_eth_dev_info).max_mtu``
> +
>  * cryptodev: support for using IV with all sizes is added, J0 still can
>    be used but only when IV length in following structs ``rte_crypto_auth_xform``,
>    ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal
> 

  parent reply	other threads:[~2020-10-21 12:41 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-20 12:03 Ferruh Yigit
2020-10-21 10:18 ` Ananyev, Konstantin
2020-10-21 15:10   ` Andrew Rybchenko
2020-10-21 16:28     ` Ferruh Yigit
2020-10-21 12:40 ` Kinsella, Ray [this message]
2020-11-24 17:36 ` [dpdk-dev] [RFC v2] " Ferruh Yigit
2020-11-24 17:47   ` Ajit Khaparde
2020-11-26 11:28   ` Andrew Rybchenko
2020-11-26 12:34     ` Ferruh Yigit
2020-11-27 18:38       ` Thomas Monjalon
2020-11-26 18:30   ` Matan Azrad
2020-11-27  9:37     ` [dpdk-dev] [RFC v2] doc: announce max Rx packet len fielddeprecation Morten Brørup

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