Function ena_device_init

dpdk/drivers/net/ena/ena_ethdev.c:1776–1859

}

static int ena_device_init(struct ena_adapter *adapter,
			   struct rte_pci_device *pdev,
			   struct ena_com_dev_get_features_ctx *get_feat_ctx)
{
	struct ena_com_dev *ena_dev = &adapter->ena_dev;
	uint32_t aenq_groups;
	int rc;
	bool readless_supported;

	/* Initialize mmio registers */
	rc = ena_com_mmio_reg_read_request_init(ena_dev);
	if (rc) {
		PMD_DRV_LOG(ERR, "Failed to init MMIO read less\n");
		return rc;
	}

	/* The PCIe configuration space revision id indicate if mmio reg
	 * read is disabled.
	 */
	readless_supported = !(pdev->id.class_id & ENA_MMIO_DISABLE_REG_READ);
	ena_com_set_mmio_read_mode(ena_dev, readless_supported);

	/* reset device */
	rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
	if (rc) {
		PMD_DRV_LOG(ERR, "Cannot reset device\n");
		goto err_mmio_read_less;
	}

	/* check FW version */
	rc = ena_com_validate_version(ena_dev);
	if (rc) {
		PMD_DRV_LOG(ERR, "Device version is too low\n");
		goto err_mmio_read_less;
	}

	ena_dev->dma_addr_bits = ena_com_get_dma_width(ena_dev);

	/* ENA device administration layer init */
	rc = ena_com_admin_init(ena_dev, &aenq_handlers);
	if (rc) {
		PMD_DRV_LOG(ERR,
			"Cannot initialize ENA admin queue\n");
		goto err_mmio_read_less;
	}

	/* To enable the msix interrupts the driver needs to know the number
	 * of queues. So the driver uses polling mode to retrieve this
	 * information.
	 */
	ena_com_set_admin_polling_mode(ena_dev, true);

	ena_config_host_info(ena_dev);

	/* Get Device Attributes and features */
	rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
	if (rc) {
		PMD_DRV_LOG(ERR,