net/ena: add interrupt handler for admin queue

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>

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index f4b137a..515d17f 100644 (file)
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -246,6 +246,7 @@ static int ena_rss_reta_query(struct rte_eth_dev *dev,
                              struct rte_eth_rss_reta_entry64 *reta_conf,
                              uint16_t reta_size);
 static int ena_get_sset_count(struct rte_eth_dev *dev, int sset);
+static void ena_interrupt_handler_rte(void *cb_arg);
 
 static const struct eth_dev_ops ena_dev_ops = {
        .dev_configure        = ena_dev_configure,
@@ -459,9 +460,16 @@ 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);
 }
@@ -908,6 +916,8 @@ 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 ||
@@ -937,6 +947,11 @@ 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;
@@ -1291,6 +1306,14 @@ err_mmio_read_less:
        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;