[dpdk-dev] rte_eth_rx_queue_count support in DPDK FM10k driver.

[Jags N <jagsnn@gmail.com>]

Hi,

I am running a DPDK application on host processor. The application is bind
to PCIe Host Interface of an FM10k switch. To prevent FM10k switch from
sending more packets than what the DPDK application can process, the idea
is to have DPDK application check the Rx Queue build up and send pause
frames towards FM10k over the PCIe Host Interface.

To check Rx Queue build up, following DPDK API was looked at, and their
availability for the purpose is mentioned below
i. rte_eth_rx_queue_count   ==>  returns unsupported by all of the DPDK
version’s FM10k driver.

The question I have is

1) Since "rte_eth_rx_queue_count" is not supported, is there a different
API that would help me find the Rx Queue build up ?
2) What would be the way to get DPDK's FM10k driver implement the
"rte_eth_rx_queue_count" ? Is there someone I could request to help with
the implementation ?
3) Is there any known technical reason for not having the
"rte_eth_rx_queue_count" implemented in DPDK's FM10k driver ? Trying to
understand if there would be anything that would block the implementation
of the API in DPDK FM10k driver.

Regards,
Jags