Function sw_port_setup

dpdk/drivers/event/sw/sw_evdev.c:136–212

}

static int
sw_port_setup(struct rte_eventdev *dev, uint8_t port_id,
		const struct rte_event_port_conf *conf)
{
	struct sw_evdev *sw = sw_pmd_priv(dev);
	struct sw_port *p = &sw->ports[port_id];
	char buf[RTE_RING_NAMESIZE];
	unsigned int i;

	struct rte_event_dev_info info;
	sw_info_get(dev, &info);

	/* detect re-configuring and return credits to instance if needed */
	if (p->initialized) {
		/* taking credits from pool is done one quanta at a time, and
		 * credits may be spend (counted in p->inflights) or still
		 * available in the port (p->inflight_credits). We must return
		 * the sum to no leak credits
		 */
		int possible_inflights = p->inflight_credits + p->inflights;
		rte_atomic32_sub(&sw->inflights, possible_inflights);
	}

	*p = (struct sw_port){0}; /* zero entire structure */
	p->id = port_id;
	p->sw = sw;

	/* check to see if rings exists - port_setup() can be called multiple
	 * times legally (assuming device is stopped). If ring exists, free it
	 * to so it gets re-created with the correct size
	 */
	snprintf(buf, sizeof(buf), "sw%d_p%u_%s", dev->data->dev_id,
			port_id, "rx_worker_ring");
	struct rte_event_ring *existing_ring = rte_event_ring_lookup(buf);
	rte_event_ring_free(existing_ring);

	p->rx_worker_ring = rte_event_ring_create(buf, MAX_SW_PROD_Q_DEPTH,
			dev->data->socket_id,
			RING_F_SP_ENQ | RING_F_SC_DEQ | RING_F_EXACT_SZ);
	if (p->rx_worker_ring == NULL) {
		SW_LOG_ERR("Error creating RX worker ring for port %d",
				port_id);
		return -1;
	}

	p->inflight_max = conf->new_event_threshold;
	p->implicit_release = !(conf->event_port_cfg &
				RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL);

	/* check if ring exists, same as rx_worker above */
	snprintf(buf, sizeof(buf), "sw%d_p%u, %s", dev->data->dev_id,
			port_id, "cq_worker_ring");
	existing_ring = rte_event_ring_lookup(buf);
	rte_event_ring_free(existing_ring);

	p->cq_worker_ring = rte_event_ring_create(buf, conf->dequeue_depth,
			dev->data->socket_id,
			RING_F_SP_ENQ | RING_F_SC_DEQ | RING_F_EXACT_SZ);