[dpdk-dev] [PATCH] ethdev: add queue state when retrieve queue information

[Ferruh Yigit]

On 3/18/2021 12:25 PM, Lijun Ou wrote:
> Currently, upper-layer application could get queue state only
> through pointers such as dev->data->tx_queue_state[queue_id],
> this is not the recommended way to access it. So this patch
> add get queue state when call rte_eth_rx_queue_info_get and
> rte_eth_tx_queue_info_get API.
> 
> Note: The hairpin queue is not supported with above
> rte_eth_*x_queue_info_get, so the queue state could be
> RTE_ETH_QUEUE_STATE_STARTED or RTE_ETH_QUEUE_STATE_STOPPED.
> Note: After add queue_state field, the 'struct rte_eth_rxq_info' size
> remains 128B, and the 'struct rte_eth_txq_info' size remains 64B, so
> it could be ABI compatible.
> 
> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
> Signed-off-by: Lijun Ou <oulijun at huawei.com>

<...>

> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
> index efda313..3b83c5a 100644
> --- a/lib/librte_ethdev/rte_ethdev.h
> +++ b/lib/librte_ethdev/rte_ethdev.h
> @@ -1591,6 +1591,8 @@ struct rte_eth_rxq_info {
>   	uint8_t scattered_rx;       /**< scattered packets RX supported. */
>   	uint16_t nb_desc;           /**< configured number of RXDs. */
>   	uint16_t rx_buf_size;       /**< hardware receive buffer size. */
> +	/**< Queues state: STARTED(1) / STOPPED(0). */
> +	uint8_t queue_state;
>   } __rte_cache_min_aligned;
>   
>   /**
> @@ -1600,6 +1602,8 @@ struct rte_eth_rxq_info {
>   struct rte_eth_txq_info {
>   	struct rte_eth_txconf conf; /**< queue config parameters. */
>   	uint16_t nb_desc;           /**< configured number of TXDs. */
> +	/**< Queues state: STARTED(1) / STOPPED(0). */
> +	uint8_t queue_state;
>   } __rte_cache_min_aligned;
>   
>   /* Generic Burst mode flag definition, values can be ORed. */
> 

This is causing an ABI warning [1], but I guess it is safe since the size of the 
struct is not changing (cache align). Adding a few more people to comment.


[1]
https://travis-ci.com/github/ovsrobot/dpdk/builds/220497651