[dpdk-dev] [PATCH v7 10/11] net/failsafe: support link status change event

[Gaetan Rivet <gaetan.rivet@6wind.com>]

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
---
 doc/guides/nics/features/failsafe.ini   |  1 +
 drivers/net/failsafe/failsafe.c         |  1 +
 drivers/net/failsafe/failsafe_ether.c   | 18 ++++++++++++++++++
 drivers/net/failsafe/failsafe_ops.c     | 23 +++++++++++++++++++++++
 drivers/net/failsafe/failsafe_private.h |  3 +++
 5 files changed, 46 insertions(+)

diff --git a/doc/guides/nics/features/failsafe.ini b/doc/guides/nics/features/failsafe.ini
index 257f579..251ce55 100644
--- a/doc/guides/nics/features/failsafe.ini
+++ b/doc/guides/nics/features/failsafe.ini
@@ -5,6 +5,7 @@
 ;
 [Features]
 Link status          = Y
+Link status event    = Y
 Queue start/stop     = Y
 MTU update           = Y
 Jumbo frame          = Y
diff --git a/drivers/net/failsafe/failsafe.c b/drivers/net/failsafe/failsafe.c
index 4d35860..151f823 100644
--- a/drivers/net/failsafe/failsafe.c
+++ b/drivers/net/failsafe/failsafe.c
@@ -240,6 +240,7 @@ fs_eth_dev_create(struct rte_vdev_device *vdev)
 		mac->addr_bytes[0], mac->addr_bytes[1],
 		mac->addr_bytes[2], mac->addr_bytes[3],
 		mac->addr_bytes[4], mac->addr_bytes[5]);
+	dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
 	return 0;
 free_args:
 	failsafe_args_free(dev);
diff --git a/drivers/net/failsafe/failsafe_ether.c b/drivers/net/failsafe/failsafe_ether.c
index ea3105c..a694b4d 100644
--- a/drivers/net/failsafe/failsafe_ether.c
+++ b/drivers/net/failsafe/failsafe_ether.c
@@ -387,3 +387,21 @@ failsafe_eth_rmv_event_callback(uint8_t port_id __rte_unused,
 	sdev->remove = 1;
 	return 0;
 }
+
+int
+failsafe_eth_lsc_event_callback(uint8_t port_id __rte_unused,
+				enum rte_eth_event_type event __rte_unused,
+				void *cb_arg, void *out __rte_unused)
+{
+	struct rte_eth_dev *dev = cb_arg;
+	int ret;
+
+	ret = dev->dev_ops->link_update(dev, 0);
+	/* We must pass on the LSC event */
+	if (ret)
+		return _rte_eth_dev_callback_process(dev,
+						     RTE_ETH_EVENT_INTR_LSC,
+						     NULL, NULL);
+	else
+		return 0;
+}
diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c
index 2e1c798..05221bc 100644
--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c
@@ -207,6 +207,8 @@ fs_dev_configure(struct rte_eth_dev *dev)
 	}
 	FOREACH_SUBDEV(sdev, i, dev) {
 		int rmv_interrupt = 0;
+		int lsc_interrupt = 0;
+		int lsc_enabled;
 
 		if (sdev->state != DEV_PROBED)
 			continue;
@@ -219,6 +221,17 @@ fs_dev_configure(struct rte_eth_dev *dev)
 		} else {
 			DEBUG("sub_device %d does not support RMV event", i);
 		}
+		lsc_enabled = dev->data->dev_conf.intr_conf.lsc;
+		lsc_interrupt = lsc_enabled &&
+				(ETH(sdev)->data->dev_flags &
+				 RTE_ETH_DEV_INTR_LSC);
+		if (lsc_interrupt) {
+			DEBUG("Enabling LSC interrupts for sub_device %d", i);
+			dev->data->dev_conf.intr_conf.lsc = 1;
+		} else if (lsc_enabled && !lsc_interrupt) {
+			DEBUG("Disabling LSC interrupts for sub_device %d", i);
+			dev->data->dev_conf.intr_conf.lsc = 0;
+		}
 		DEBUG("Configuring sub-device %d", i);
 		sdev->remove = 0;
 		ret = rte_eth_dev_configure(PORT_ID(sdev),
@@ -239,6 +252,16 @@ fs_dev_configure(struct rte_eth_dev *dev)
 				     SUB_ID(sdev));
 		}
 		dev->data->dev_conf.intr_conf.rmv = 0;
+		if (lsc_interrupt) {
+			ret = rte_eth_dev_callback_register(PORT_ID(sdev),
+						RTE_ETH_EVENT_INTR_LSC,
+						failsafe_eth_lsc_event_callback,
+						dev);
+			if (ret)
+				WARN("Failed to register LSC callback for sub_device %d",
+				     SUB_ID(sdev));
+		}
+		dev->data->dev_conf.intr_conf.lsc = lsc_enabled;
 		sdev->state = DEV_ACTIVE;
 	}
 	if (PRIV(dev)->state < DEV_ACTIVE)
diff --git a/drivers/net/failsafe/failsafe_private.h b/drivers/net/failsafe/failsafe_private.h
index 6a8041d..6b34998 100644
--- a/drivers/net/failsafe/failsafe_private.h
+++ b/drivers/net/failsafe/failsafe_private.h
@@ -179,6 +179,9 @@ void failsafe_dev_remove(struct rte_eth_dev *dev);
 int failsafe_eth_rmv_event_callback(uint8_t port_id,
 				    enum rte_eth_event_type type,
 				    void *arg, void *out);
+int failsafe_eth_lsc_event_callback(uint8_t port_id,
+				    enum rte_eth_event_type event,
+				    void *cb_arg, void *out);
 
 /* GLOBALS */
 
-- 
2.1.4