[dpdk-dev] [PATCH v9 2/8] ethdev: add new api to add Rx callback as head of the list
thomas.monjalon at 6wind.com
Tue Jun 14 22:01:48 CEST 2016
2016-06-14 10:38, Reshma Pattan:
> Added new public api rte_eth_add_first_rx_callback to add given
> callback as head of the list.
> Signed-off-by: Reshma Pattan <reshma.pattan at intel.com>
> +* Add a callback that must be called first on packet RX on a given port
> +* and queue.
> +* This API configures a first function to be called for each burst of
> +* packets received on a given NIC port queue. The return value is a pointer
> +* that can be used to later remove the callback using
> +* rte_eth_remove_rx_callback().
> +* Multiple functions are called in the order that they are added.
> +* @param port_id
> +* The port identifier of the Ethernet device.
> +* @param queue_id
> +* The queue on the Ethernet device on which the callback is to be added.
> +* @param fn
> +* The callback function
> +* @param user_param
> +* A generic pointer parameter which will be passed to each invocation of the
> +* callback function on this port and queue.
> +* @return
> +* NULL on error.
> +* On success, a pointer value which can later be used to remove the callback.
> +void *rte_eth_add_first_rx_callback(uint8_t port_id, uint16_t queue_id,
> + rte_rx_callback_fn fn, void *user_param);
Sorry I fail to understand why this function is needed.
What cannot be done in rte_eth_add_rx_callback?
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