net/mlx5: Expose SF firmware pages counter

Currently, each core device has VF pages counter which stores number of
fw pages used by its VFs and SFs.

The current design led to a hang when performing firmware reset on DPU,
where the DPU PFs stalled in sriov unload flow due to waiting on release
of SFs pages instead of waiting on only VFs pages.

Thus, Add a separate counter for SF firmware pages, which will prevent
the stall scenario described above.

Fixes: 1958fc2f0712 ("net/mlx5: SF, Add auxiliary device driver")
Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
index c3e7c24..bb95b40 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
@@ -246,6 +246,7 @@ void mlx5_pages_debugfs_init(struct mlx5_core_dev *dev)
 
        debugfs_create_u32("fw_pages_total", 0400, pages, &dev->priv.fw_pages);
        debugfs_create_u32("fw_pages_vfs", 0400, pages, &dev->priv.page_counters[MLX5_VF]);
+       debugfs_create_u32("fw_pages_sfs", 0400, pages, &dev->priv.page_counters[MLX5_SF]);
        debugfs_create_u32("fw_pages_host_pf", 0400, pages, &dev->priv.page_counters[MLX5_HOST_PF]);
        debugfs_create_u32("fw_pages_alloc_failed", 0400, pages, &dev->priv.fw_pages_alloc_failed);
        debugfs_create_u32("fw_pages_give_dropped", 0400, pages, &dev->priv.give_pages_dropped);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index 9f99292..0eb50be 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -79,7 +79,7 @@ static u16 func_id_to_type(struct mlx5_core_dev *dev, u16 func_id, bool ec_funct
        if (!func_id)
                return mlx5_core_is_ecpf(dev) && !ec_function ? MLX5_HOST_PF : MLX5_PF;
 
-       return MLX5_VF;
+       return func_id <= mlx5_core_max_vfs(dev) ?  MLX5_VF : MLX5_SF;
 }
 
 static struct rb_root *page_root_per_function(struct mlx5_core_dev *dev, u32 function)

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 82a9bd4..333c1fe 100644 (file)
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -576,6 +576,7 @@ struct mlx5_debugfs_entries {
 enum mlx5_func_type {
        MLX5_PF,
        MLX5_VF,
+       MLX5_SF,
        MLX5_HOST_PF,
        MLX5_FUNC_TYPE_NUM,
 };