Function sfc_ev_qstart

dpdk/drivers/net/sfc/sfc_ev.c:647–762

Event queue HW index allocation scheme is described in sfc_ev.h. */

/* Event queue HW index allocation scheme is described in sfc_ev.h. */
int
sfc_ev_qstart(struct sfc_evq *evq, unsigned int hw_index)
{
	struct sfc_adapter *sa = evq->sa;
	efsys_mem_t *esmp;
	uint32_t evq_flags = sa->evq_flags;
	uint32_t irq = 0;
	unsigned int total_delay_us;
	unsigned int delay_us;
	int rc;

	sfc_log_init(sa, "hw_index=%u", hw_index);

	esmp = &evq->mem;

	evq->evq_index = hw_index;

	/* Clear all events */
	(void)memset((void *)esmp->esm_base, 0xff,
		     efx_evq_size(sa->nic, evq->entries, evq_flags));

	if (sa->intr.lsc_intr && hw_index == sa->mgmt_evq_index) {
		evq_flags |= EFX_EVQ_FLAGS_NOTIFY_INTERRUPT;
		irq = 0;
	} else if (sa->intr.rxq_intr && evq->dp_rxq != NULL) {
		sfc_ethdev_qid_t ethdev_qid;

		ethdev_qid =
			sfc_ethdev_rx_qid_by_rxq_sw_index(sfc_sa2shared(sa),
				evq->dp_rxq->dpq.queue_id);
		if (ethdev_qid != SFC_ETHDEV_QID_INVALID) {
			evq_flags |= EFX_EVQ_FLAGS_NOTIFY_INTERRUPT;
			/*
			 * The first interrupt is used for management EvQ
			 * (LSC etc). RxQ interrupts follow it.
			 */
			irq = 1 + ethdev_qid;
		} else {
			evq_flags |= EFX_EVQ_FLAGS_NOTIFY_DISABLED;
		}
	} else {
		evq_flags |= EFX_EVQ_FLAGS_NOTIFY_DISABLED;
	}

	evq->init_state = SFC_EVQ_STARTING;

	/* Create the common code event queue */
	rc = efx_ev_qcreate_irq(sa->nic, hw_index, esmp, evq->entries,
				0 /* unused on EF10 */, 0, evq_flags,
				irq, &evq->common);
	if (rc != 0)
		goto fail_ev_qcreate;

	SFC_ASSERT(evq->dp_rxq == NULL || evq->dp_txq == NULL);
	if (evq->dp_rxq != 0) {
		if (strcmp(sa->priv.dp_rx->dp.name,
			   SFC_KVARG_DATAPATH_EFX) == 0)
			evq->callbacks = &sfc_ev_callbacks_efx_rx;