From: Maher Sanalla msanalla@nvidia.com
[ Upstream commit e1ed30c8c09abc85a01c897845bdbd08c0333353 ]
Currently, during the early stages of their unloading, particularly during SRIOV disablement, PFs/ECPFs wait on the release of all of their VFs memory pages. Furthermore, ECPFs are considered the page supplier for host VFs, hence the host VFs memory pages are freed only during ECPF cleanup when host interfaces get disabled.
Thus, disabling SRIOV early in unload timeline causes the DPU ECPF to stall on driver unload while waiting on the release of host VF pages that won't be freed before host interfaces get disabled later on.
Therefore, for ECPFs, wait on the release of VFs pages only after the disablement of host PFs during ECPF cleanup flow. Then, host PFs and VFs are disabled and their memory shall be freed accordingly.
Fixes: 143a41d7623d ("net/mlx5: Disable SRIOV before PF removal") Signed-off-by: Maher Sanalla msanalla@nvidia.com Reviewed-by: Moshe Shemesh moshe@nvidia.com Signed-off-by: Saeed Mahameed saeedm@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx5/core/ecpf.c | 4 ++++ drivers/net/ethernet/mellanox/mlx5/core/sriov.c | 4 ++++ 2 files changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c b/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c index cdc87ecae5d39..d000236ddbac5 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c @@ -90,4 +90,8 @@ void mlx5_ec_cleanup(struct mlx5_core_dev *dev) err = mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_HOST_PF]); if (err) mlx5_core_warn(dev, "Timeout reclaiming external host PF pages err(%d)\n", err); + + err = mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_VF]); + if (err) + mlx5_core_warn(dev, "Timeout reclaiming external host VFs pages err(%d)\n", err); } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c index 3008e9ce2bbff..20d7662c10fb6 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c @@ -147,6 +147,10 @@ mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf)
mlx5_eswitch_disable_sriov(dev->priv.eswitch, clear_vf);
+ /* For ECPFs, skip waiting for host VF pages until ECPF is destroyed */ + if (mlx5_core_is_ecpf(dev)) + return; + if (mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_VF])) mlx5_core_warn(dev, "timeout reclaiming VFs pages\n"); }