[PATCH v1 4/5] net/mlx5: add modify IPv6 protocol implementation

[Rongwei Liu <rongweil@nvidia.com>]

Add HWS modify IPv6 protocol implementation.

Signed-off-by: Rongwei Liu <rongweil@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 drivers/common/mlx5/mlx5_prm.h  |  1 +
 drivers/net/mlx5/mlx5_flow_dv.c | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index b32dc735a1..7667874152 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -760,6 +760,7 @@ enum mlx5_modification_field {
 	MLX5_MODI_TUNNEL_HDR_DW_1 = 0x75,
 	MLX5_MODI_GTPU_FIRST_EXT_DW_0 = 0x76,
 	MLX5_MODI_HASH_RESULT = 0x81,
+	MLX5_MODI_OUT_IPV6_NEXT_HDR = 0x4A,
 };
 
 /* Total number of metadata reg_c's. */
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 7ca909999b..e972a2dc5a 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -1357,6 +1357,7 @@ mlx5_flow_item_field_width(struct rte_eth_dev *dev,
 	case RTE_FLOW_FIELD_IPV6_DSCP:
 		return 6;
 	case RTE_FLOW_FIELD_IPV6_HOPLIMIT:
+	case RTE_FLOW_FIELD_IPV6_PROTO:
 		return 8;
 	case RTE_FLOW_FIELD_IPV6_SRC:
 	case RTE_FLOW_FIELD_IPV6_DST:
@@ -1883,6 +1884,15 @@ mlx5_flow_field_id_to_modify_info
 				info[idx].offset = data->offset;
 		}
 		break;
+	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};
+		if (mask)
+			mask[idx] = flow_modify_info_mask_8(width, off_be);
+		else
+			info[idx].offset = off_be;
+		break;
 	case RTE_FLOW_FIELD_POINTER:
 	case RTE_FLOW_FIELD_VALUE:
 	default:
-- 
2.27.0