[dpdk-dev] [PATCH v4 1/6] fm10k: implement rx_descriptor_done function

Qiu, Michael michael.qiu at intel.com
Tue Dec 22 07:50:54 CET 2015


On 12/21/2015 6:20 PM, Shaopeng He wrote:
> rx_descriptor_done is used by interrupt mode example application
> (l3fwd-power) to check rxd DD bit to decide the RX trend,
> then l3fwd-power will adjust the cpu frequency according to
> the result.
>
> Signed-off-by: Shaopeng He <shaopeng.he at intel.com>
> Acked-by: Jing Chen <jing.d.chen at intel.com>
> ---
>  drivers/net/fm10k/fm10k.h        |  3 +++
>  drivers/net/fm10k/fm10k_ethdev.c |  1 +
>  drivers/net/fm10k/fm10k_rxtx.c   | 25 +++++++++++++++++++++++++
>  3 files changed, 29 insertions(+)
>
> diff --git a/drivers/net/fm10k/fm10k.h b/drivers/net/fm10k/fm10k.h
> index cd38af2..e2f677a 100644
> --- a/drivers/net/fm10k/fm10k.h
> +++ b/drivers/net/fm10k/fm10k.h
> @@ -345,6 +345,9 @@ uint16_t fm10k_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
>  uint16_t fm10k_recv_scattered_pkts(void *rx_queue,
>  		struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
>  
> +int
> +fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset);
> +
>  uint16_t fm10k_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
>  	uint16_t nb_pkts);
>  
> diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
> index e4aed94..d39c33b 100644
> --- a/drivers/net/fm10k/fm10k_ethdev.c
> +++ b/drivers/net/fm10k/fm10k_ethdev.c
> @@ -2435,6 +2435,7 @@ static const struct eth_dev_ops fm10k_eth_dev_ops = {
>  	.rx_queue_release	= fm10k_rx_queue_release,
>  	.tx_queue_setup		= fm10k_tx_queue_setup,
>  	.tx_queue_release	= fm10k_tx_queue_release,
> +	.rx_descriptor_done	= fm10k_dev_rx_descriptor_done,
>  	.reta_update		= fm10k_reta_update,
>  	.reta_query		= fm10k_reta_query,
>  	.rss_hash_update	= fm10k_rss_hash_update,
> diff --git a/drivers/net/fm10k/fm10k_rxtx.c b/drivers/net/fm10k/fm10k_rxtx.c
> index e958865..36d3002 100644
> --- a/drivers/net/fm10k/fm10k_rxtx.c
> +++ b/drivers/net/fm10k/fm10k_rxtx.c
> @@ -369,6 +369,31 @@ fm10k_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
>  	return nb_rcv;
>  }
>  
> +int
> +fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset)
> +{
> +	volatile union fm10k_rx_desc *rxdp;
> +	struct fm10k_rx_queue *rxq = rx_queue;
> +	uint16_t desc;
> +	int ret;
> +
> +	if (unlikely(offset >= rxq->nb_desc)) {
> +		PMD_DRV_LOG(ERR, "Invalid RX queue id %u", offset);

Sorry, here makes my confuse: offset for RX queue id?

> +		return 0;
> +	}
> +
> +	desc = rxq->next_dd + offset;
> +	if (desc >= rxq->nb_desc)
> +		desc -= rxq->nb_desc;
> +
> +	rxdp = &rxq->hw_ring[desc];
> +
> +	ret = !!(rxdp->w.status &
> +			rte_cpu_to_le_16(FM10K_RXD_STATUS_DD));
> +
> +	return ret;
> +}
> +
>  static inline void tx_free_descriptors(struct fm10k_tx_queue *q)
>  {
>  	uint16_t next_rs, count = 0;



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