[PATCH 1/4] net/mlx5: add TCP/IP length modify field

[Suanming Mou]

This commit adds TCP data offset, IPv4 total length, IPv4 IHL,
IPv6 payload length in modify field operation.

Signed-off-by: Suanming Mou <suanmingm at nvidia.com>
---
 drivers/common/mlx5/mlx5_prm.h  |  4 ++++
 drivers/net/mlx5/mlx5_flow_dv.c | 40 +++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index 9e22dce6da..0d46ba9c40 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -848,6 +848,10 @@ enum mlx5_modification_field {
 	MLX5_MODI_META_REG_C_13 = 0x94,
 	MLX5_MODI_META_REG_C_14 = 0x95,
 	MLX5_MODI_META_REG_C_15 = 0x96,
+	MLX5_MODI_OUT_IPV4_TOTAL_LEN = 0x11D,
+	MLX5_MODI_OUT_IPV6_PAYLOAD_LEN = 0x11E,
+	MLX5_MODI_OUT_IPV4_IHL = 0x11F,
+	MLX5_MODI_OUT_TCP_DATA_OFFSET = 0x120,
 	MLX5_MODI_INVALID = INT_MAX,
 };
 
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 115d730317..4e2095dcfe 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -1664,6 +1664,16 @@ mlx5_flow_field_id_to_modify_info
 		else
 			info[idx].offset = off_be;
 		break;
+	case RTE_FLOW_FIELD_IPV4_IHL:
+		MLX5_ASSERT(data->offset + width <= 4);
+		off_be = 4 - (data->offset + width);
+		info[idx] = (struct field_modify_info){1, 0,
+					MLX5_MODI_OUT_IPV4_IHL};
+		if (mask)
+			mask[idx] = flow_modify_info_mask_8(width, off_be);
+		else
+			info[idx].offset = off_be;
+		break;
 	case RTE_FLOW_FIELD_IPV4_DSCP:
 		MLX5_ASSERT(data->offset + width <= 6);
 		off_be = 6 - (data->offset + width);
@@ -1674,6 +1684,16 @@ mlx5_flow_field_id_to_modify_info
 		else
 			info[idx].offset = off_be;
 		break;
+	case RTE_FLOW_FIELD_IPV4_TOTAL_LEN:
+		MLX5_ASSERT(data->offset + width <= 16);
+		off_be = 16 - (data->offset + width);
+		info[idx] = (struct field_modify_info){2, 0,
+					MLX5_MODI_OUT_IPV4_TOTAL_LEN};
+		if (mask)
+			mask[idx] = flow_modify_info_mask_16(width, off_be);
+		else
+			info[idx].offset = off_be;
+		break;
 	case RTE_FLOW_FIELD_IPV4_TTL:
 		MLX5_ASSERT(data->offset + width <= 8);
 		off_be = 8 - (data->offset + width);
@@ -1714,6 +1734,16 @@ mlx5_flow_field_id_to_modify_info
 		else
 			info[idx].offset = off_be;
 		break;
+	case RTE_FLOW_FIELD_IPV6_PAYLOAD_LEN:
+		MLX5_ASSERT(data->offset + width <= 16);
+		off_be = 16 - (data->offset + width);
+		info[idx] = (struct field_modify_info){2, 0,
+					MLX5_MODI_OUT_IPV6_PAYLOAD_LEN};
+		if (mask)
+			mask[idx] = flow_modify_info_mask_16(width, off_be);
+		else
+			info[idx].offset = off_be;
+		break;
 	case RTE_FLOW_FIELD_IPV6_HOPLIMIT:
 		MLX5_ASSERT(data->offset + width <= 8);
 		off_be = 8 - (data->offset + width);
@@ -1860,6 +1890,16 @@ mlx5_flow_field_id_to_modify_info
 		else
 			info[idx].offset = off_be;
 		break;
+	case RTE_FLOW_FIELD_TCP_DATA_OFFSET:
+		MLX5_ASSERT(data->offset + width <= 4);
+		off_be = 4 - (data->offset + width);
+		info[idx] = (struct field_modify_info){1, 0,
+					MLX5_MODI_OUT_TCP_DATA_OFFSET};
+		if (mask)
+			mask[idx] = flow_modify_info_mask_8(width, off_be);
+		else
+			info[idx].offset = off_be;
+		break;
 	case RTE_FLOW_FIELD_UDP_PORT_SRC:
 		MLX5_ASSERT(data->offset + width <= 16);
 		off_be = 16 - (data->offset + width);
-- 
2.34.1