[dpdk-dev] [RFC 2/4] net/i40e: enable async device reset

[Qi Zhang <qi.z.zhang@intel.com>]

Handle device reset in a separate thread and raise
RTE_ETH_EVENT_RESET_COMPLETE event when it is done.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c    | 28 +++++++++++++++++++++++-----
 drivers/net/i40e/i40e_ethdev_vf.c | 28 +++++++++++++++++++++++-----
 2 files changed, 46 insertions(+), 10 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 85a6a867f..611570159 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2439,12 +2439,29 @@ i40e_dev_close(struct rte_eth_dev *dev)
 	I40E_WRITE_FLUSH(hw);
 }
 
+static void *
+do_dev_reset(void *args)
+{
+	struct rte_eth_dev *dev = args;
+	int ret;
+
+	ret = eth_i40e_dev_uninit(dev);
+	if (!ret)
+		ret = eth_i40e_dev_init(dev, NULL);
+
+	_rte_eth_dev_callback_process(dev,
+			RTE_ETH_EVENT_RESET_COMPLETE,
+			&ret);
+	return NULL;
+}
+
 /*
  * Reset PF device only to re-initialize resources in PMD layer
  */
 static int
 i40e_dev_reset(struct rte_eth_dev *dev)
 {
+	pthread_t tid;
 	int ret;
 
 	/* When a DPDK PMD PF begin to reset PF port, it should notify all
@@ -2456,11 +2473,12 @@ i40e_dev_reset(struct rte_eth_dev *dev)
 	if (dev->data->sriov.active)
 		return -ENOTSUP;
 
-	ret = eth_i40e_dev_uninit(dev);
-	if (ret)
-		return ret;
-
-	ret = eth_i40e_dev_init(dev, NULL);
+	/**
+	 * Since dev_reset should be implemented as async, do
+	 * reset in a separate thread.
+	 */
+	ret = rte_ctrl_thread_create(&tid, "i40e_dev_reset",
+			NULL, do_dev_reset, dev);
 
 	return ret;
 }
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 001c301b9..e10e81792 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -2284,19 +2284,37 @@ i40evf_dev_close(struct rte_eth_dev *dev)
 	i40evf_disable_irq0(hw);
 }
 
+static void *
+do_dev_reset(void *args)
+{
+	struct rte_eth_dev *dev = args;
+	int ret;
+
+	ret = i40evf_dev_uninit(dev);
+	if (!ret)
+		ret = i40evf_dev_init(dev);
+
+	_rte_eth_dev_callback_process(dev,
+			RTE_ETH_EVENT_RESET_COMPLETE,
+			&ret);
+	return NULL;
+}
+
 /*
  * Reset VF device only to re-initialize resources in PMD layer
  */
 static int
 i40evf_dev_reset(struct rte_eth_dev *dev)
 {
+	pthread_t tid;
 	int ret;
 
-	ret = i40evf_dev_uninit(dev);
-	if (ret)
-		return ret;
-
-	ret = i40evf_dev_init(dev);
+	/**
+	 * Since dev_reset should be implemented as async, do
+	 * reset in a separate thread.
+	 */
+	ret = rte_ctrl_thread_create(&tid, "i40evf_dev_reset",
+				NULL, do_dev_reset, dev);
 
 	return ret;
 }
-- 
2.13.6