[v2,4/4] net/iavf: add support for runtime queue reconfiguration

  Unlike the i40e driver, the iavf driver does not advertise support for
runtime reconfiguration, meaning that application using the same
hardware may get different behaviour when using a PF vs a VF. On testing
with a 40G NIC, the only blocker to reconfiguring an RX queue on the fly
is the fact that this support is not advertised by the driver.

Add support for runtime reconfig by reporting it in the device info
flags.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 doc/guides/nics/features/iavf.ini | 2 ++
 drivers/net/iavf/iavf_ethdev.c    | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)
  

> -----Original Message-----
> From: Bruce Richardson <bruce.richardson@intel.com>
> Sent: Thursday, August 31, 2023 8:34 PM
> To: dev@dpdk.org
> Cc: Richardson, Bruce <bruce.richardson@intel.com>
> Subject: [PATCH v2 4/4] net/iavf: add support for runtime queue
> reconfiguration
> 
> Unlike the i40e driver, the iavf driver does not advertise support for runtime
> reconfiguration, meaning that application using the same hardware may get
> different behaviour when using a PF vs a VF. On testing with a 40G NIC, the
> only blocker to reconfiguring an RX queue on the fly is the fact that this
> support is not advertised by the driver.
> 
> Add support for runtime reconfig by reporting it in the device info flags.
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
>  doc/guides/nics/features/iavf.ini | 2 ++
>  drivers/net/iavf/iavf_ethdev.c    | 4 +++-
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/doc/guides/nics/features/iavf.ini
> b/doc/guides/nics/features/iavf.ini
> index b72cd98484..db4f92ce71 100644
> --- a/doc/guides/nics/features/iavf.ini
> +++ b/doc/guides/nics/features/iavf.ini
> @@ -11,6 +11,8 @@ Speed capabilities   = Y
>  Link status          = Y
>  Rx interrupt         = Y
>  Queue start/stop     = Y
> +Runtime Rx queue setup = Y
> +Runtime Tx queue setup = Y
>  Power mgmt address monitor = Y
>  MTU update           = Y
>  Scattered Rx         = Y
> diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
> index f2fc5a5621..22fbd7d6b2 100644
> --- a/drivers/net/iavf/iavf_ethdev.c
> +++ b/drivers/net/iavf/iavf_ethdev.c
> @@ -1127,7 +1127,9 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *dev_info)
>  	dev_info->reta_size = vf->vf_res->rss_lut_size;
>  	dev_info->flow_type_rss_offloads = IAVF_RSS_OFFLOAD_ALL;
>  	dev_info->max_mac_addrs = IAVF_NUM_MACADDR_MAX;
> -	dev_info->dev_capa &= ~RTE_ETH_DEV_CAPA_FLOW_RULE_KEEP;
> +	dev_info->dev_capa =
> +		RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP |
> +		RTE_ETH_DEV_CAPA_RUNTIME_TX_QUEUE_SETUP;
>  	dev_info->rx_offload_capa =
>  		RTE_ETH_RX_OFFLOAD_VLAN_STRIP |
>  		RTE_ETH_RX_OFFLOAD_QINQ_STRIP |
> --
> 2.39.2

Acked-by: Qi Zhang <qi.z.zhang@intel.com>

Squashed with Patch 3/4, applied to dpdk-next-net-intel.

Thanks
Qi