[RFC PATCH 05/21] mlx5/xsk: check that xsk does not conflict with netgpu

[Jonathan Lemon]

netgpu will use the same data structures as xsk, so make sure that
they are not conflicting.

Signed-off-by: Jonathan Lemon <jonathan.le...@gmail.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.c | 3 +++
 drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.c
index 7b17fcd0a56d..f3d3569816cb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.c
@@ -27,7 +27,10 @@ static int mlx5e_xsk_get_umems(struct mlx5e_xsk *xsk)
                                     sizeof(*xsk->umems), GFP_KERNEL);
                if (unlikely(!xsk->umems))
                        return -ENOMEM;
+               xsk->is_netgpu = false;
        }
+       if (xsk->is_netgpu)
+               return -EINVAL;
 
        xsk->refcnt++;
        xsk->ever_used = true;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.h 
b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.h
index 25b4cbe58b54..c7eff534d28a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/umem.h
@@ -15,6 +15,9 @@ static inline struct xdp_umem *mlx5e_xsk_get_umem(struct 
mlx5e_params *params,
        if (unlikely(ix >= params->num_channels))
                return NULL;
 
+       if (unlikely(xsk->is_netgpu))
+               return NULL;
+
        return xsk->umems[ix];
 }
 
-- 
2.24.1