[EXT] [dpdk-dev v1] lib/cryptodev: multi-process IPC request handler

[Akhil Goyal]

This is a library change you should cc all PMD owners while sending patch.

> This patch add in multi-process IPC request handler function in rte
> cryptodev. This function intend to support a queue-pair configuration
> request to allow the secondary process to reconfigure the queue-pair
> setup'ed by the primary process.

Who will release the queue pair already setup by primary in the first place?
Currently, all queues are setup by primary and secondary uses them.
So if a queue is re-initialized by secondary, and if it is being used in primary process,
Wont that drop packets abruptly if the queue is re-initialized?

Also, I see register API but not deregister.
> 
> Signed-off-by: Kai Ji <kai.ji at intel.com>
> ---
>  lib/cryptodev/rte_cryptodev.c | 45 +++++++++++++++++++++++++++++++++++
>  lib/cryptodev/rte_cryptodev.h | 14 +++++++++++
>  2 files changed, 59 insertions(+)
> 
> diff --git a/lib/cryptodev/rte_cryptodev.c b/lib/cryptodev/rte_cryptodev.c
> index 42f3221052..18fdbf6db6 100644
> --- a/lib/cryptodev/rte_cryptodev.c
> +++ b/lib/cryptodev/rte_cryptodev.c
> @@ -1202,6 +1202,51 @@ rte_cryptodev_get_qp_status(uint8_t dev_id,
> uint16_t queue_pair_id)
>  	return 0;
>  }
> 
> +/* crypto queue pair config */
> +#define CRYPTODEV_MP_REQ "cryptodev_mp_request"
> +
> +static int
> +rte_cryptodev_mp_request(const struct rte_mp_msg *mp_msg, const void
> *peer)
> +{
> +	struct rte_mp_msg mp_res;
> +	struct rte_cryptodev_mp_param *res =
> +		(struct rte_cryptodev_mp_param *)mp_res.param;
> +	const struct rte_cryptodev_mp_param *param =
> +		(const struct rte_cryptodev_mp_param *)mp_msg->param;
> +
> +	int ret;
> +	int dev_id = 0;
> +	int port_id = 0, socket_id = 1;
> +	struct rte_cryptodev_qp_conf queue_conf;
> +	queue_conf.nb_descriptors = 2;
> +
> +	RTE_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
> +	switch (param->type) {
> +	case RTE_CRYPTODEV_MP_REQ_QP:
> +		ret = rte_cryptodev_queue_pair_setup(dev_id, port_id,
> +				&queue_conf, socket_id);
> +		res->result = ret;
> +
> +		ret = rte_mp_reply(&mp_res, peer);
> +		break;
> +	default:
> +		CDEV_LOG_ERR("invalid mp request type\n");
> +		return -EINVAL;
> +	}
> +	return ret;
> +
> +}
> +
> +int rte_cryptodev_mp_request_register(void)
> +{
> +	int ret;
> +
> +	RTE_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
> +	ret = rte_mp_action_register(CRYPTODEV_MP_REQ,
> +				rte_cryptodev_mp_request);
> +	return ret;
> +}
> +
>  int
>  rte_cryptodev_queue_pair_setup(uint8_t dev_id, uint16_t queue_pair_id,
>  		const struct rte_cryptodev_qp_conf *qp_conf, int socket_id)
> diff --git a/lib/cryptodev/rte_cryptodev.h b/lib/cryptodev/rte_cryptodev.h
> index 56f459c6a0..901465ca65 100644
> --- a/lib/cryptodev/rte_cryptodev.h
> +++ b/lib/cryptodev/rte_cryptodev.h
> @@ -539,6 +539,18 @@ enum rte_cryptodev_event_type {
>  	RTE_CRYPTODEV_EVENT_MAX		/**< max value of this enum */
>  };
> 
> +/* Request types for IPC. */
> +enum rte_cryptodev_mp_req_type {
> +	RTE_CRYPTODEV_MP_REQ_NONE,
> +	RTE_CRYPTODEV_MP_REQ_QP
> +};
> +
> +/* Parameters for IPC. */
> +struct rte_cryptodev_mp_param {
> +	enum rte_cryptodev_mp_req_type type;
> +	int result;
> +};
> +
>  /** Crypto device queue pair configuration structure. */
>  struct rte_cryptodev_qp_conf {
>  	uint32_t nb_descriptors; /**< Number of descriptors per queue pair */
> @@ -744,6 +756,8 @@ rte_cryptodev_stop(uint8_t dev_id);
>  extern int
>  rte_cryptodev_close(uint8_t dev_id);
> 
> +extern int rte_cryptodev_mp_request_register(void);
> +
>  /**
>   * Allocate and set up a receive queue pair for a device.
>   *
> --
> 2.17.1