From: Maher Sanalla Date: Wed, 15 Feb 2023 18:12:05 +0000 (+0200) Subject: net/mlx5: ECPF, wait for VF pages only after disabling host PFs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e1ed30c8c09abc85a01c897845bdbd08c0333353;p=linux.git net/mlx5: ECPF, wait for VF pages only after disabling host PFs 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 Reviewed-by: Moshe Shemesh Signed-off-by: Saeed Mahameed --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c b/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c index 9a3878f9e5824..7c9c4e40c019b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c @@ -98,4 +98,8 @@ 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"); }