Function sfc_intr_start

dpdk/drivers/net/sfc/sfc_intr.c:140–237

}

int
sfc_intr_start(struct sfc_adapter *sa)
{
	struct sfc_intr *intr = &sa->intr;
	struct rte_intr_handle *intr_handle;
	struct rte_pci_device *pci_dev;
	int rc;

	sfc_log_init(sa, "entry");

	/*
	 * The EFX common code event queue module depends on the interrupt
	 * module. Ensure that the interrupt module is always initialized
	 * (even if interrupts are not used).  Status memory is required
	 * for Siena only and may be NULL for EF10.
	 */
	sfc_log_init(sa, "efx_intr_init");
	rc = efx_intr_init(sa->nic, intr->type, NULL);
	if (rc != 0)
		goto fail_intr_init;

	pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
	intr_handle = pci_dev->intr_handle;

	if (intr->handler != NULL) {
		if (intr->rxq_intr && rte_intr_cap_multiple(intr_handle)) {
			uint32_t intr_vector;

			intr_vector = sa->eth_dev->data->nb_rx_queues;
			rc = rte_intr_efd_enable(intr_handle, intr_vector);
			if (rc != 0)
				goto fail_rte_intr_efd_enable;
		}
		if (rte_intr_dp_is_en(intr_handle)) {
			if (rte_intr_vec_list_alloc(intr_handle,
					"intr_vec",
					sa->eth_dev->data->nb_rx_queues)) {
				sfc_err(sa,
					"Failed to allocate %d rx_queues intr_vec",
					sa->eth_dev->data->nb_rx_queues);
				goto fail_intr_vector_alloc;
			}

		}

		sfc_log_init(sa, "rte_intr_callback_register");
		rc = rte_intr_callback_register(intr_handle, intr->handler,
						(void *)sa);
		if (rc != 0) {
			sfc_err(sa,
				"cannot register interrupt handler (rc=%d)",
				rc);
			/*
			 * Convert error code from negative returned by RTE API
			 * to positive used in the driver.
			 */
			rc = -rc;
			goto fail_rte_intr_cb_reg;