Re: [dpdk-dev] [PATCH 8/8] net/iavf: support check DD bit of a RX descriptor

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Ferruh Yigit
> Sent: Monday, October 12, 2020 4:33 PM
> To: Zhang, RobinX <robinx.zhang@intel.com>; dev@dpdk.org
> Cc: Xing, Beilei <beilei.xing@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>;
> Yang, Qiming <qiming.yang@intel.com>; Yang, SteveX
> <stevex.yang@intel.com>
> Subject: Re: [dpdk-dev] [PATCH 8/8] net/iavf: support check DD bit of a RX
> descriptor
> 
> On 10/10/2020 2:49 AM, Zhang, RobinX wrote:
> > Hi Ferruh
> >
> >> -----Original Message-----
> >> From: Ferruh Yigit <ferruh.yigit@intel.com>
> >> Sent: Thursday, October 8, 2020 11:06 PM
> >> To: Zhang, RobinX <robinx.zhang@intel.com>; dev@dpdk.org
> >> Cc: Xing, Beilei <beilei.xing@intel.com>; Wu, Jingjing
> >> <jingjing.wu@intel.com>; Yang, Qiming <qiming.yang@intel.com>; Yang,
> >> SteveX <stevex.yang@intel.com>
> >> Subject: Re: [dpdk-dev] [PATCH 8/8] net/iavf: support check DD bit of
> >> a RX descriptor
> >>
> >> On 9/27/2020 8:26 AM, Robin Zhang wrote:
> >>> Add implementation of inline API rx_descriptor_done in iavf PMD.
> >>>
> >>> Signed-off-by: Robin Zhang <robinx.zhang@intel.com>
> >>> ---
> >>>    drivers/net/iavf/iavf_ethdev.c |  1 +
> >>>    drivers/net/iavf/iavf_rxtx.c   | 26 ++++++++++++++++++++++++++
> >>>    drivers/net/iavf/iavf_rxtx.h   |  1 +
> >>>    3 files changed, 28 insertions(+)
> >>>
> >>> diff --git a/drivers/net/iavf/iavf_ethdev.c
> >>> b/drivers/net/iavf/iavf_ethdev.c index 836c09f58..b7a819a0e 100644
> >>> --- a/drivers/net/iavf/iavf_ethdev.c
> >>> +++ b/drivers/net/iavf/iavf_ethdev.c
> >>> @@ -1417,6 +1417,7 @@ iavf_dev_init(struct rte_eth_dev *eth_dev)
> >>>    	/* assign ops func pointer */
> >>>    	eth_dev->dev_ops = &iavf_eth_dev_ops;
> >>>    	eth_dev->rx_queue_count = iavf_dev_rxq_count;
> >>> +	eth_dev->rx_descriptor_done = iavf_dev_rx_desc_done;
> >>>    	eth_dev->rx_descriptor_status = iavf_dev_rx_desc_status;
> >>>    	eth_dev->tx_descriptor_status = iavf_dev_tx_desc_status;
> >>
> >> Hi Robin,
> >>
> >> 'rx_descriptor_done' dev_ops is deprecated, 'rx_descriptor_status'
> >> should provide same information?
> >>
> >> Is there a specific reason/need to implement 'rx_descriptor_done'? If
> >> not I will drop this patch.
> >
> > The purpose of this patch is keep same behavior between i40evf and iavf.
> >
> > Refer to i40evf commit cbfc6111b5 in dpdk-next-net-intel,
> 'rx_descriptor_done' is moved to 'struct rte_eth_dev'.
> >
> 
> I see, but for i40evf, the 'rx_descriptor_done' was already there and it will be
> removed in 21.11.
> 
> I think no need to add a deprecated feature. 'rte_eth_rx_descriptor_status'
> replaces it and it is already implemented in iavf.

+1. Let's drop this patch.