This patch implements the VXLAN decap action in DV flow for MLX5 PMD.
Signed-off-by: Dekel Peled <dek...@mellanox.com>
---
drivers/net/mlx5/mlx5_flow.h | 1 +
drivers/net/mlx5/mlx5_flow_dv.c | 103 ++++++++++++++++++++++++++++++++++++++--
2 files changed, 100 insertions(+), 4 deletions(-)
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index 6e92afe..3795644 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -93,6 +93,7 @@
#define MLX5_FLOW_ACTION_SET_MAC_SRC (1u << 20)
#define MLX5_FLOW_ACTION_SET_MAC_DST (1u << 21)
#define MLX5_FLOW_ACTION_VXLAN_ENCAP (1u << 22)
+#define MLX5_FLOW_ACTION_VXLAN_DECAP (1u << 23)
#define MLX5_FLOW_FATE_ACTIONS \
(MLX5_FLOW_ACTION_DROP | MLX5_FLOW_ACTION_QUEUE | MLX5_FLOW_ACTION_RSS)
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 14110c5..e84a2b6 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -131,11 +131,12 @@
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, NULL,
"can't drop and encap in same flow");
- if (action_flags & MLX5_FLOW_ACTION_VXLAN_ENCAP)
+ if (action_flags & (MLX5_FLOW_ACTION_VXLAN_ENCAP |
+ MLX5_FLOW_ACTION_VXLAN_DECAP))
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, NULL,
- "can only have a single encap"
- " action in a flow");
+ "can only have a single encap or"
+ " decap action in a flow");
if (attr->ingress)
return rte_flow_error_set(error, ENOTSUP,
RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
@@ -146,6 +147,47 @@
}
/**
+ * Validate the L2 decap action.
+ * Used for VXLAN decap action.
+ *
+ * @param[in] action_flags
+ * Holds the actions detected until now.
+ * @param[in] action
+ * Pointer to the decap action.
+ * @param[in] attr
+ * Pointer to flow attributes
+ * @param[out] error
+ * Pointer to error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_validate_action_l2_decap(uint64_t action_flags,
+ const struct rte_flow_action *action __rte_unused,
+ const struct rte_flow_attr *attr,
+ struct rte_flow_error *error)
+{
+ if (action_flags & MLX5_FLOW_ACTION_DROP)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION, NULL,
+ "can't drop and decap in same flow");
+ if (action_flags & (MLX5_FLOW_ACTION_VXLAN_ENCAP |
+ MLX5_FLOW_ACTION_VXLAN_DECAP))
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION, NULL,
+ "can only have a single encap or"
+ " decap action in a flow");
+ if (attr->egress)
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
+ NULL,
+ "decap action not supported for "
+ "egress");
+ return 0;
+}
+
+/**
* Get the size of specific rte_flow_item_type
*
* @param[in] item_type
@@ -396,6 +438,38 @@
}
/**
+ * Convert L2 decap action to DV specification.
+ * Used for VXLAN decap action.
+ *
+ * @param[in] dev
+ * Pointer to rte_eth_dev structure.
+ * @param[in] action
+ * Pointer to action structure.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * Pointer to action on success, NULL otherwise and rte_errno is set.
+ */
+static struct ibv_flow_action *
+flow_dv_create_action_l2_decap(struct rte_eth_dev *dev,
+ const struct rte_flow_action *action __rte_unused,
+ struct rte_flow_error *error)
+{
+ struct ibv_flow_action *verbs_action = NULL;
+ struct priv *priv = dev->data->dev_private;
+
+ verbs_action = mlx5_glue->dv_create_flow_action_packet_reformat
+ (priv->ctx, 0, NULL,
+ MLX5DV_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TUNNEL_TO_L2,
+ MLX5DV_FLOW_TABLE_TYPE_NIC_RX);
+ if (!verbs_action)
+ rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_ACTION,
+ NULL, "cannot create L2 decap action");
+ return verbs_action;
+}
+
+/**
* Verify the @p attributes will be correctly understood by the NIC and store
* them in the @p flow if everything is correct.
*
@@ -648,7 +722,15 @@
action_flags |= MLX5_FLOW_ACTION_VXLAN_ENCAP;
++actions_n;
break;
-
+ case RTE_FLOW_ACTION_TYPE_VXLAN_DECAP:
+ ret = flow_dv_validate_action_l2_decap(action_flags,
+ actions, attr,
+ error);
+ if (ret < 0)
+ return ret;
+ action_flags |= MLX5_FLOW_ACTION_VXLAN_DECAP;
+ ++actions_n;
+ break;
default:
return rte_flow_error_set(error, ENOTSUP,
RTE_FLOW_ERROR_TYPE_ACTION,
@@ -1435,6 +1517,19 @@
flow->actions |= MLX5_FLOW_ACTION_VXLAN_ENCAP;
actions_n++;
break;
+ case RTE_FLOW_ACTION_TYPE_VXLAN_DECAP:
+ dev_flow->dv.actions[actions_n].type =
+ MLX5DV_FLOW_ACTION_IBV_FLOW_ACTION;
+ dev_flow->dv.actions[actions_n].action =
+ flow_dv_create_action_l2_decap(dev, action,
+ error);
+ if (!(dev_flow->dv.actions[actions_n].action))
+ return -rte_errno;
+ dev_flow->dv.verbs_action =
+ dev_flow->dv.actions[actions_n].action;
+ flow->actions |= MLX5_FLOW_ACTION_VXLAN_DECAP;
+ actions_n++;
+ break;
default:
break;
}
--
1.8.3.1
