RDMA/mlx5: Send events from IB driver about device affiliation state

Send blocking events from IB driver whenever the device is done being
affiliated or if it is removed from an affiliation.

This is useful since now the EN driver can register to those event and
know when a device is affiliated or not.

Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://lore.kernel.org/r/a7491c3e483cfd8d962f5f75b9a25f253043384a.1695296682.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: PatrisiousHaddad

drivers/infiniband/hw/mlx5/main.c

@@ -24,6 +24,7 @@
 #include <linux/mlx5/vport.h>
 #include <linux/mlx5/fs.h>
 #include <linux/mlx5/eswitch.h>
+#include <linux/mlx5/driver.h>
 #include <linux/list.h>
 #include <rdma/ib_smi.h>
 #include <rdma/ib_umem_odp.h>
@@ -3175,6 +3176,13 @@ static void mlx5_ib_unbind_slave_port(struct mlx5_ib_dev *ibdev,
 
 	lockdep_assert_held(&mlx5_ib_multiport_mutex);
 
+	mlx5_core_mp_event_replay(ibdev->mdev,
+				  MLX5_DRIVER_EVENT_AFFILIATION_REMOVED,
+				  NULL);
+	mlx5_core_mp_event_replay(mpi->mdev,
+				  MLX5_DRIVER_EVENT_AFFILIATION_REMOVED,
+				  NULL);
+
 	mlx5_ib_cleanup_cong_debugfs(ibdev, port_num);
 
 	spin_lock(&port->mp.mpi_lock);
@@ -3226,6 +3234,7 @@ static bool mlx5_ib_bind_slave_port(struct mlx5_ib_dev *ibdev,
 				    struct mlx5_ib_multiport_info *mpi)
 {
 	u32 port_num = mlx5_core_native_port_num(mpi->mdev) - 1;
+	u64 key;
 	int err;
 
 	lockdep_assert_held(&mlx5_ib_multiport_mutex);
@@ -3254,6 +3263,14 @@ static bool mlx5_ib_bind_slave_port(struct mlx5_ib_dev *ibdev,
 
 	mlx5_ib_init_cong_debugfs(ibdev, port_num);
 
+	key = ibdev->ib_dev.index;
+	mlx5_core_mp_event_replay(mpi->mdev,
+				  MLX5_DRIVER_EVENT_AFFILIATION_DONE,
+				  &key);
+	mlx5_core_mp_event_replay(ibdev->mdev,
+				  MLX5_DRIVER_EVENT_AFFILIATION_DONE,
+				  &key);
+
 	return true;
 
 unbind:

drivers/net/ethernet/mellanox/mlx5/core/main.c

@@ -361,6 +361,12 @@ void mlx5_core_uplink_netdev_event_replay(struct mlx5_core_dev *dev)
 }
 EXPORT_SYMBOL(mlx5_core_uplink_netdev_event_replay);
 
+void mlx5_core_mp_event_replay(struct mlx5_core_dev *dev, u32 event, void *data)
+{
+	mlx5_blocking_notifier_call_chain(dev, event, data);
+}
+EXPORT_SYMBOL(mlx5_core_mp_event_replay);
+
 int mlx5_core_get_caps_mode(struct mlx5_core_dev *dev, enum mlx5_cap_type cap_type,
 			    enum mlx5_cap_mode cap_mode)
 {

include/linux/mlx5/device.h

@@ -366,6 +366,8 @@ enum mlx5_driver_event {
 	MLX5_DRIVER_EVENT_UPLINK_NETDEV,
 	MLX5_DRIVER_EVENT_MACSEC_SA_ADDED,
 	MLX5_DRIVER_EVENT_MACSEC_SA_DELETED,
+	MLX5_DRIVER_EVENT_AFFILIATION_DONE,
+	MLX5_DRIVER_EVENT_AFFILIATION_REMOVED,
 };
 
 enum {

include/linux/mlx5/driver.h

@@ -1027,6 +1027,8 @@ bool mlx5_cmd_is_down(struct mlx5_core_dev *dev);
 void mlx5_core_uplink_netdev_set(struct mlx5_core_dev *mdev, struct net_device *netdev);
 void mlx5_core_uplink_netdev_event_replay(struct mlx5_core_dev *mdev);
 
+void mlx5_core_mp_event_replay(struct mlx5_core_dev *dev, u32 event, void *data);
+
 void mlx5_health_cleanup(struct mlx5_core_dev *dev);
 int mlx5_health_init(struct mlx5_core_dev *dev);
 void mlx5_start_health_poll(struct mlx5_core_dev *dev);