net/ena: handle ENA notification

When ENA notifications are provided ena_notification handler is called.
It checks if received value is not corrupted and if necessary it
reports proper warnings.

Data received from NIC is parsed in ena_update_hints. Fields for
storing those information was added to ena_adapter structure.

ENA notification are enabled by setting ENA_ADMIN_NOTIFICATION flag in
aenq_groups.

Signed-off-by: Rafal Kozik <rk@semihalf.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index a344b25..1b8fc0f 100644 (file)
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -1290,7 +1290,8 @@ static int ena_device_init(struct ena_com_dev *ena_dev,
                goto err_admin_init;
        }
 
-       aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE);
+       aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
+                     BIT(ENA_ADMIN_NOTIFICATION);
 
        aenq_groups &= get_feat_ctx->aenq.supported_groups;
        rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
@@ -1724,6 +1725,19 @@ eth_ena_prep_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
        return i;
 }
 
+static void ena_update_hints(struct ena_adapter *adapter,
+                            struct ena_admin_ena_hw_hints *hints)
+{
+       if (hints->admin_completion_tx_timeout)
+               adapter->ena_dev.admin_queue.completion_timeout =
+                       hints->admin_completion_tx_timeout * 1000;
+
+       if (hints->mmio_read_timeout)
+               /* convert to usec */
+               adapter->ena_dev.mmio_read.reg_read_to =
+                       hints->mmio_read_timeout * 1000;
+}
+
 static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
                                  uint16_t nb_pkts)
 {
@@ -1918,6 +1932,29 @@ static void ena_update_on_link_change(void *adapter_data,
        _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 }
 
+static void ena_notification(void *data,
+                            struct ena_admin_aenq_entry *aenq_e)
+{
+       struct ena_adapter *adapter = (struct ena_adapter *)data;
+       struct ena_admin_ena_hw_hints *hints;
+
+       if (aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION)
+               RTE_LOG(WARNING, PMD, "Invalid group(%x) expected %x\n",
+                       aenq_e->aenq_common_desc.group,
+                       ENA_ADMIN_NOTIFICATION);
+
+       switch (aenq_e->aenq_common_desc.syndrom) {
+       case ENA_ADMIN_UPDATE_HINTS:
+               hints = (struct ena_admin_ena_hw_hints *)
+                       (&aenq_e->inline_data_w4);
+               ena_update_hints(adapter, hints);
+               break;
+       default:
+               RTE_LOG(ERR, PMD, "Invalid aenq notification link state %d\n",
+                       aenq_e->aenq_common_desc.syndrom);
+       }
+}
+
 /**
  * This handler will called for unknown event group or unimplemented handlers
  **/
@@ -1930,7 +1967,7 @@ static void unimplemented_aenq_handler(__rte_unused void *data,
 static struct ena_aenq_handlers aenq_handlers = {
        .handlers = {
                [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
-               [ENA_ADMIN_NOTIFICATION] = unimplemented_aenq_handler,
+               [ENA_ADMIN_NOTIFICATION] = ena_notification,
                [ENA_ADMIN_KEEP_ALIVE] = unimplemented_aenq_handler
        },
        .unimplemented_handler = unimplemented_aenq_handler