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From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: Konstantin Ananyev <konstantin.ananyev@intel.com>, dev@dpdk.org
Cc: xiaoyun.li@intel.com, anoobj@marvell.com, jerinj@marvell.com,
	ndabilpuram@marvell.com, adwivedi@marvell.com,
	shepard.siegel@atomicrules.com, ed.czeck@atomicrules.com,
	john.miller@atomicrules.com, irusskikh@marvell.com,
	ajit.khaparde@broadcom.com, somnath.kotur@broadcom.com,
	rahul.lakkireddy@chelsio.com, hemant.agrawal@nxp.com,
	sachin.saxena@oss.nxp.com, haiyue.wang@intel.com,
	johndale@cisco.com, hyonkim@cisco.com, qi.z.zhang@intel.com,
	xiao.w.wang@intel.com, humin29@huawei.com,
	yisen.zhuang@huawei.com, oulijun@huawei.com,
	beilei.xing@intel.com, jingjing.wu@intel.com,
	qiming.yang@intel.com, matan@nvidia.com, viacheslavo@nvidia.com,
	sthemmin@microsoft.com, longli@microsoft.com,
	heinrich.kuhn@corigine.com, kirankumark@marvell.com,
	mczekaj@marvell.com, jiawenwu@trustnetic.com,
	jianwang@trustnetic.com, maxime.coquelin@redhat.com,
	chenbo.xia@intel.com, thomas@monjalon.net,
	ferruh.yigit@intel.com, mdr@ashroe.eu,
	jay.jayatheerthan@intel.com
Subject: Re: [dpdk-dev] [PATCH v6 3/6] ethdev: copy fast-path API into separate structure
Date: Wed, 13 Oct 2021 17:25:50 +0300
Message-ID: <6557f6b4-02ab-9af2-af50-c2a73f502365@oktetlabs.ru> (raw)
In-Reply-To: <20211013133704.31296-4-konstantin.ananyev@intel.com>

On 10/13/21 4:37 PM, Konstantin Ananyev wrote:
> Copy public function pointers (rx_pkt_burst(), etc.) and related
> pointers to internal data from rte_eth_dev structure into a
> separate flat array. That array will remain in a public header.
> The intention here is to make rte_eth_dev and related structures internal.
> That should allow future possible changes to core eth_dev structures
> to be transparent to the user and help to avoid ABI/API breakages.
> The plan is to keep minimal part of data from rte_eth_dev public,
> so we still can use inline functions for fast-path calls
> (like rte_eth_rx_burst(), etc.) to avoid/minimize slowdown.
> The whole idea beyond this new schema:
> 1. PMDs keep to setup fast-path function pointers and related data
>    inside rte_eth_dev struct in the same way they did it before.
> 2. Inside rte_eth_dev_start() and inside rte_eth_dev_probing_finish()
>    (for secondary process) we call eth_dev_fp_ops_setup, which
>    copies these function and data pointers into rte_eth_fp_ops[port_id].
> 3. Inside rte_eth_dev_stop() and inside rte_eth_dev_release_port()
>    we call eth_dev_fp_ops_reset(), which resets rte_eth_fp_ops[port_id]
>    into some dummy values.
> 4. fast-path ethdev API (rte_eth_rx_burst(), etc.) will use that new
>    flat array to call PMD specific functions.
> That approach should allow us to make rte_eth_devices[] private
> without introducing regression and help to avoid changes in drivers code.
> 
> Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

  reply	other threads:[~2021-10-13 14:25 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <0211007112750.25526-1-konstantin.ananyev@intel.com>
2021-10-13 13:36 ` [dpdk-dev] [PATCH v6 0/6] hide eth dev related structures Konstantin Ananyev
2021-10-13 13:36   ` [dpdk-dev] [PATCH v6 1/6] ethdev: allocate max space for internal queue array Konstantin Ananyev
2021-10-13 14:20     ` Andrew Rybchenko
2021-10-13 13:37   ` [dpdk-dev] [PATCH v6 2/6] ethdev: change input parameters for rx_queue_count Konstantin Ananyev
2021-10-13 13:37   ` [dpdk-dev] [PATCH v6 3/6] ethdev: copy fast-path API into separate structure Konstantin Ananyev
2021-10-13 14:25     ` Andrew Rybchenko [this message]
2021-10-13 13:37   ` [dpdk-dev] [PATCH v6 4/6] ethdev: make fast-path functions to use new flat array Konstantin Ananyev
2021-10-13 13:37   ` [dpdk-dev] [PATCH v6 5/6] ethdev: add API to retrieve multiple ethernet addresses Konstantin Ananyev
2021-10-13 14:31     ` Andrew Rybchenko
2021-10-13 18:58       ` Ferruh Yigit
2021-10-13 13:37   ` [dpdk-dev] [PATCH v6 6/6] ethdev: hide eth dev related structures Konstantin Ananyev
2021-10-13 14:32     ` Andrew Rybchenko
2021-10-13 20:16   ` [dpdk-dev] [PATCH v6 0/6] " Ferruh Yigit
2021-10-14 10:12     ` [dpdk-dev] 回复: " Feifei Wang
2021-10-18 16:04     ` [dpdk-dev] " Ali Alnubani
2021-10-18 16:47       ` Ferruh Yigit
2021-10-18 23:47         ` Ajit Khaparde

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