net/mlx5: DR, Add function that tells if STE miss addr has been initialized

Up until now miss address in all the STEs was used to connect miss lists
and to link the last STE in the list to end anchor.
Match range STE will require special handling because its miss address is
part of the 'action'. That is, range action has hit and miss addresses.
Since the range action is always the last action, need to make sure that
its miss address isn't overwritten by the end anchor.

Adding new function mlx5dr_ste_is_miss_addr_set() to answer the question
whether the STE's miss address has already been set as part of STE
initialization. Use a callback that always returns false right now. Once
match range is added, a different callback will be used for that STE type.

Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Erez Shitrit <erezsh@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
index 9e19a8dc9022..1e15f605df6e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
@@ -90,6 +90,16 @@ static void dr_ste_set_always_miss(struct dr_hw_ste_format *hw_ste)
 	hw_ste->mask[0] = 0;
 }
 
+bool mlx5dr_ste_is_miss_addr_set(struct mlx5dr_ste_ctx *ste_ctx,
+				 u8 *hw_ste_p)
+{
+	if (!ste_ctx->is_miss_addr_set)
+		return false;
+
+	/* check if miss address is already set for this type of STE */
+	return ste_ctx->is_miss_addr_set(hw_ste_p);
+}
+
 void mlx5dr_ste_set_miss_addr(struct mlx5dr_ste_ctx *ste_ctx,
 			      u8 *hw_ste_p, u64 miss_addr)
 {