Function ixgbe_dev_interrupt_action

dpdk/drivers/net/ixgbe/ixgbe_ethdev.c:4664–4724

* It executes link_update after knowing an interrupt occurred. * * @param dev * Pointer to struct rte_eth_dev. * * @return * - On success, zero. * - On failure, a negative value. */

 *  - On failure, a negative value.
 */
static int
ixgbe_dev_interrupt_action(struct rte_eth_dev *dev)
{
	struct ixgbe_interrupt *intr =
		IXGBE_DEV_PRIVATE_TO_INTR(dev->data->dev_private);
	int64_t timeout;
	struct ixgbe_hw *hw =
		IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);

	PMD_DRV_LOG(DEBUG, "intr action type %d", intr->flags);

	if (intr->flags & IXGBE_FLAG_MAILBOX) {
		ixgbe_pf_mbx_process(dev);
		intr->flags &= ~IXGBE_FLAG_MAILBOX;
	}

	if (intr->flags & IXGBE_FLAG_PHY_INTERRUPT) {
		ixgbe_handle_lasi(hw);
		intr->flags &= ~IXGBE_FLAG_PHY_INTERRUPT;
	}

	if (intr->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
		struct rte_eth_link link;

		/* get the link status before link update, for predicting later */
		rte_eth_linkstatus_get(dev, &link);

		ixgbe_dev_link_update(dev, 0);

		/* likely to up */
		if (!link.link_status)
			/* handle it 1 sec later, wait it being stable */
			timeout = IXGBE_LINK_UP_CHECK_TIMEOUT;
		/* likely to down */
		else
			/* handle it 4 sec later, wait it being stable */
			timeout = IXGBE_LINK_DOWN_CHECK_TIMEOUT;

		ixgbe_dev_link_status_print(dev);

		/* Don't program delayed handler if LSC interrupt is disabled.
		 * It means one is already programmed.
		 */
		if (intr->mask & IXGBE_EIMS_LSC) {
			if (rte_eal_alarm_set(timeout * 1000,
					      ixgbe_dev_interrupt_delayed_handler, (void *)dev) < 0)
				PMD_DRV_LOG(ERR, "Error setting alarm");
			else {
				/* remember original mask */
				intr->mask_original = intr->mask;
				/* only disable lsc interrupt */
				intr->mask &= ~IXGBE_EIMS_LSC;
			}
		}
	}

	PMD_DRV_LOG(DEBUG, "enable intr immediately");
	ixgbe_enable_intr(dev);