[dpdk-dev] [PATCH v3] net/avp: remove resources when port is closed

[Allain Legacy <allain.legacy@windriver.com>]

The rte_eth_dev_close() function now handles freeing resources for
devices (e.g., mac_addrs).  To conform with the new close() behaviour we
are asserting the RTE_ETH_DEV_CLOSE_REMOVE flag so that
rte_eth_dev_close() releases all device level dynamic memory.

Second level memory allocated to each individual rx/tx queue is now
freed as part of the close() operation therefore making it safe for the
rte_eth_dev_close() function to free the device private data without
orphaning the rx/tx queue pointers.

Cc: Matt Peters <matt.peters@windriver.com>
Signed-off-by: Allain Legacy <allain.legacy@windriver.com>
---
 drivers/net/avp/avp_ethdev.c | 52 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 43 insertions(+), 9 deletions(-)

diff --git a/drivers/net/avp/avp_ethdev.c b/drivers/net/avp/avp_ethdev.c
index 57af5158d..47b96eca0 100644
--- a/drivers/net/avp/avp_ethdev.c
+++ b/drivers/net/avp/avp_ethdev.c
@@ -959,6 +959,8 @@ eth_avp_dev_init(struct rte_eth_dev *eth_dev)
 	eth_dev->dev_ops = &avp_eth_dev_ops;
 	eth_dev->rx_pkt_burst = &avp_recv_pkts;
 	eth_dev->tx_pkt_burst = &avp_xmit_pkts;
+	/* Let rte_eth_dev_close() release the port resources */
+	eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
 
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 		/*
@@ -1023,19 +1025,13 @@ eth_avp_dev_init(struct rte_eth_dev *eth_dev)
 static int
 eth_avp_dev_uninit(struct rte_eth_dev *eth_dev)
 {
-	int ret;
-
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return -EPERM;
 
 	if (eth_dev->data == NULL)
 		return 0;
 
-	ret = avp_dev_disable_interrupts(eth_dev);
-	if (ret != 0) {
-		PMD_DRV_LOG(ERR, "Failed to disable interrupts, ret=%d\n", ret);
-		return ret;
-	}
+	avp_dev_close(eth_dev);
 
 	return 0;
 }
@@ -1941,8 +1937,25 @@ avp_dev_rx_queue_release(void *rx_queue)
 	unsigned int i;
 
 	for (i = 0; i < avp->num_rx_queues; i++) {
-		if (data->rx_queues[i] == rxq)
+		if (data->rx_queues[i] == rxq) {
+			rte_free(data->rx_queues[i]);
+			data->rx_queues[i] = NULL;
+		}
+	}
+}
+
+static void
+avp_dev_rx_queue_release_all(struct rte_eth_dev *eth_dev)
+{
+	struct avp_dev *avp = AVP_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
+	struct rte_eth_dev_data *data = avp->dev_data;
+	unsigned int i;
+
+	for (i = 0; i < avp->num_rx_queues; i++) {
+		if (data->rx_queues[i]) {
+			rte_free(data->rx_queues[i]);
 			data->rx_queues[i] = NULL;
+		}
 	}
 }
 
@@ -1955,8 +1968,25 @@ avp_dev_tx_queue_release(void *tx_queue)
 	unsigned int i;
 
 	for (i = 0; i < avp->num_tx_queues; i++) {
-		if (data->tx_queues[i] == txq)
+		if (data->tx_queues[i] == txq) {
+			rte_free(data->tx_queues[i]);
+			data->tx_queues[i] = NULL;
+		}
+	}
+}
+
+static void
+avp_dev_tx_queue_release_all(struct rte_eth_dev *eth_dev)
+{
+	struct avp_dev *avp = AVP_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
+	struct rte_eth_dev_data *data = avp->dev_data;
+	unsigned int i;
+
+	for (i = 0; i < avp->num_tx_queues; i++) {
+		if (data->tx_queues[i]) {
+			rte_free(data->tx_queues[i]);
 			data->tx_queues[i] = NULL;
+		}
 	}
 }
 
@@ -2105,6 +2135,10 @@ avp_dev_close(struct rte_eth_dev *eth_dev)
 		/* continue */
 	}
 
+	/* release dynamic storage for rx/tx queues */
+	avp_dev_rx_queue_release_all(eth_dev);
+	avp_dev_tx_queue_release_all(eth_dev);
+
 unlock:
 	rte_spinlock_unlock(&avp->lock);
 }
-- 
2.12.1