net/mlx5: add eCPRI flex parser capacity check

If the NIC or the FW does not support the dynamic flex parser,
it will return error when trying to create the parser for eCRPI.
Then it is hard to know the detail error reason of the failure.
Before creating the parser node and the following usage of the
parser, the capacity bit saved in the HCA_CAP could be used to
confirm if the dynamic flex parser is supported.
If no, an error will be returned directly with ENOTSUP to prevent
the following steps to be executed.

Signed-off-by: Bing Zhao <bingz@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 8fcb78a..723c1dd 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -649,6 +649,11 @@ mlx5_flex_parser_ecpri_alloc(struct rte_eth_dev *dev)
        uint32_t ids[8];
        int ret;
 
+       if (!priv->config.hca_attr.parse_graph_flex_node) {
+               DRV_LOG(ERR, "Dynamic flex parser is not supported "
+                       "for device %s.", priv->dev_data->name);
+               return -ENOTSUP;
+       }
        node.header_length_mode = MLX5_GRAPH_NODE_LEN_FIXED;
        /* 8 bytes now: 4B common header + 4B message body header. */
        node.header_length_base_value = 0x8;