[PATCH v1 03/24] net/ena: add interrupt handler for admin queue

[Michal Krawczyk <mk@semihalf.com>]

The ENA device is able to send MSI-X when it will complete an command
when polling mode is deactivated. Further, the same interrupt handler
will be used for the AENQ handling - services of the ENA device, that
allows to implement watchdog or lsc handler.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
---
 drivers/net/ena/ena_ethdev.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index 81e36b1ef..ec0380f0a 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -250,6 +250,7 @@ static bool ena_are_tx_queue_offloads_allowed(struct ena_adapter *adapter,
 					      uint64_t offloads);
 static bool ena_are_rx_queue_offloads_allowed(struct ena_adapter *adapter,
 					      uint64_t offloads);
+static void ena_interrupt_handler_rte(void *cb_arg);

 static const struct eth_dev_ops ena_dev_ops = {
 	.dev_configure        = ena_dev_configure,
@@ -463,9 +464,16 @@ static void ena_close(struct rte_eth_dev *dev)
 {
 	struct ena_adapter *adapter =
 		(struct ena_adapter *)(dev->data->dev_private);
+	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;

 	adapter->state = ENA_ADAPTER_STATE_STOPPED;

+	rte_intr_disable(intr_handle);
+	rte_intr_callback_unregister(intr_handle,
+				     ena_interrupt_handler_rte,
+				     adapter);
+
 	ena_rx_queue_release_all(dev);
 	ena_tx_queue_release_all(dev);
 }
@@ -912,6 +920,8 @@ static int ena_start(struct rte_eth_dev *dev)
 {
 	struct ena_adapter *adapter =
 		(struct ena_adapter *)(dev->data->dev_private);
+	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
 	int rc = 0;

 	if (!(adapter->state == ENA_ADAPTER_STATE_CONFIG ||
@@ -941,6 +951,11 @@ static int ena_start(struct rte_eth_dev *dev)

 	ena_stats_restart(dev);

+	rte_intr_callback_register(intr_handle,
+				   ena_interrupt_handler_rte,
+				   adapter);
+	rte_intr_enable(intr_handle);
+
 	adapter->state = ENA_ADAPTER_STATE_RUNNING;

 	return 0;
@@ -1306,6 +1321,14 @@ static int ena_device_init(struct ena_com_dev *ena_dev,
 	return rc;
 }

+static void ena_interrupt_handler_rte(__rte_unused void *cb_arg)
+{
+	struct ena_adapter *adapter = (struct ena_adapter *)cb_arg;
+	struct ena_com_dev *ena_dev = &adapter->ena_dev;
+
+	ena_com_admin_q_comp_intr_handler(ena_dev);
+}
+
 static int eth_ena_dev_init(struct rte_eth_dev *eth_dev)
 {
 	struct rte_pci_device *pci_dev;
--
2.14.1