From: Patrisious Haddad <phaddad@xxxxxxxxxx>
Previously loopback for MPV was supposed to be permanently enabled,
however other driver flows were able to over-ride that configuration
and disable it.
Add force_lb parameter that indicates that loopback should always be
enabled which prevents all other driver flows from disabling it.
Fixes: a9a9e68954f2 ("RDMA/mlx5: Fix vport loopback for MPV device")
Signed-off-by: Patrisious Haddad <phaddad@xxxxxxxxxx>
Reviewed-by: Mark Bloch <mbloch@xxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/main.c | 19 +++++++++++++++----
drivers/infiniband/hw/mlx5/mlx5_ib.h | 1 +
2 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index de5339170876..1fbc0351063d 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1839,7 +1839,8 @@ static void deallocate_uars(struct mlx5_ib_dev *dev,
}
static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master,
- struct mlx5_core_dev *slave)
+ struct mlx5_core_dev *slave,
+ struct mlx5_ib_lb_state *lb_state)
{
int err;
@@ -1851,6 +1852,7 @@ static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master,
if (err)
goto out;
+ lb_state->force_enable = true;
return 0;
out:
@@ -1859,16 +1861,22 @@ static int mlx5_ib_enable_lb_mp(struct mlx5_core_dev *master,
}
static void mlx5_ib_disable_lb_mp(struct mlx5_core_dev *master,
- struct mlx5_core_dev *slave)
+ struct mlx5_core_dev *slave,
+ struct mlx5_ib_lb_state *lb_state)
{
mlx5_nic_vport_update_local_lb(slave, false);
mlx5_nic_vport_update_local_lb(master, false);
+
+ lb_state->force_enable = false;
}
int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev, bool td, bool qp)
{
int err = 0;
+ if (dev->lb.force_enable)
+ return 0;
+
mutex_lock(&dev->lb.mutex);
if (td)
dev->lb.user_td++;
@@ -1890,6 +1898,9 @@ int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev, bool td, bool qp)
void mlx5_ib_disable_lb(struct mlx5_ib_dev *dev, bool td, bool qp)
{
+ if (dev->lb.force_enable)
+ return;
+
mutex_lock(&dev->lb.mutex);
if (td)
dev->lb.user_td--;
@@ -3597,7 +3608,7 @@ static void mlx5_ib_unbind_slave_port(struct mlx5_ib_dev *ibdev,
lockdep_assert_held(&mlx5_ib_multiport_mutex);
- mlx5_ib_disable_lb_mp(ibdev->mdev, mpi->mdev);
+ mlx5_ib_disable_lb_mp(ibdev->mdev, mpi->mdev, &ibdev->lb);
mlx5_core_mp_event_replay(ibdev->mdev,
MLX5_DRIVER_EVENT_AFFILIATION_REMOVED,
@@ -3694,7 +3705,7 @@ static bool mlx5_ib_bind_slave_port(struct mlx5_ib_dev *ibdev,
MLX5_DRIVER_EVENT_AFFILIATION_DONE,
&key);
- err = mlx5_ib_enable_lb_mp(ibdev->mdev, mpi->mdev);
+ err = mlx5_ib_enable_lb_mp(ibdev->mdev, mpi->mdev, &ibdev->lb);
if (err)
goto unbind;
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index a6c83ce2f0ee..4fc2c0ca2af3 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -1111,6 +1111,7 @@ struct mlx5_ib_lb_state {
u32 user_td;
int qps;
bool enabled;
+ bool force_enable;
};
struct mlx5_ib_pf_eq {
--
2.50.1
