[PATCH 3/6] net/mlx5: add modify IPv4 protocol implementation

[Viacheslav Ovsiienko <viacheslavo@nvidia.com>]

Add modify IPv4 protocol implementation for mlx5 PMD.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 doc/guides/rel_notes/release_24_03.rst | 1 +
 drivers/common/mlx5/mlx5_prm.h         | 1 +
 drivers/net/mlx5/mlx5_flow_dv.c        | 4 +++-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/doc/guides/rel_notes/release_24_03.rst b/doc/guides/rel_notes/release_24_03.rst
index 33e9303ae1..3e33ff2d86 100644
--- a/doc/guides/rel_notes/release_24_03.rst
+++ b/doc/guides/rel_notes/release_24_03.rst
@@ -91,6 +91,7 @@ New Features
   * Added HW steering support for modify field ``RTE_FLOW_FIELD_GENEVE_OPT_TYPE`` flow action.
   * Added HW steering support for modify field ``RTE_FLOW_FIELD_GENEVE_OPT_CLASS`` flow action.
   * Added HW steering support for modify field ``RTE_FLOW_FIELD_GENEVE_OPT_DATA`` flow action.
+  * Added HW steering support for modify field ``RTE_FLOW_FIELD_IPV4_PROTO`` flow action.
 
 
 Removed Items
diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index f64f25dbb7..44413517d0 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -839,6 +839,7 @@ enum mlx5_modification_field {
 	MLX5_MODI_IN_MPLS_LABEL_2,
 	MLX5_MODI_IN_MPLS_LABEL_3,
 	MLX5_MODI_IN_MPLS_LABEL_4,
+	MLX5_MODI_OUT_IP_PROTOCOL = 0x4A,
 	MLX5_MODI_OUT_IPV6_NEXT_HDR = 0x4A,
 	MLX5_MODI_META_REG_C_8 = 0x8F,
 	MLX5_MODI_META_REG_C_9 = 0x90,
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 6998be107f..764940b700 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -1384,6 +1384,7 @@ mlx5_flow_item_field_width(struct rte_eth_dev *dev,
 	case RTE_FLOW_FIELD_IPV4_DSCP:
 		return 6;
 	case RTE_FLOW_FIELD_IPV4_TTL:
+	case RTE_FLOW_FIELD_IPV4_PROTO:
 		return 8;
 	case RTE_FLOW_FIELD_IPV4_SRC:
 	case RTE_FLOW_FIELD_IPV4_DST:
@@ -2194,10 +2195,11 @@ mlx5_flow_field_id_to_modify_info
 				info[idx].offset = data->offset;
 		}
 		break;
+	case RTE_FLOW_FIELD_IPV4_PROTO: /* Fall-through. */
 	case RTE_FLOW_FIELD_IPV6_PROTO:
 		MLX5_ASSERT(data->offset + width <= 8);
 		off_be = 8 - (data->offset + width);
-		info[idx] = (struct field_modify_info){1, 0, MLX5_MODI_OUT_IPV6_NEXT_HDR};
+		info[idx] = (struct field_modify_info){1, 0, MLX5_MODI_OUT_IP_PROTOCOL};
 		if (mask)
 			mask[idx] = flow_modify_info_mask_8(width, off_be);
 		else
-- 
2.18.1