[PATCH 2/2] net/mlx5: support PF representor suppresion in multi-port E-Switch

[Gregory Etelson]

In multi-port E-Switch setup, the MLX5 PMD always added
PF representor port.
For example, `representor=pf1vf[0,1]` implicitly added PF1 representor
port:

```
Port     Name
0        p0
1        p1
2        representor_c0pf1vf0
3        representor_c0pf1vf1
```

The patch adds support for the new representor format that suppresses
PF representor attachment:

Example: `representor=(pf1)vf[0,1]`

```
Port     Name
0        p0
1        representor_c0pf1vf0
2        representor_c0pf1vf1
```

Signed-off-by: Gregory Etelson <getelson at nvidia.com>
---
 drivers/net/mlx5/linux/mlx5_os.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 8d11b1ac3a..92084b4cdd 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -2284,6 +2284,12 @@ mlx5_device_mpesw_pci_match(struct ibv_device *ibv,
 	return -1;
 }
 
+static inline bool
+mlx5_ingnore_pf_representor(const struct rte_eth_devargs *eth_da)
+{
+	return (eth_da->port_flags & RTE_ETH_DEVARG_IGNORE_PF_REPRESENTOR) != 0;
+}
+
 /**
  * Register a PCI device within bonding.
  *
@@ -2593,8 +2599,12 @@ mlx5_os_pci_probe_pf(struct mlx5_common_device *cdev,
 						list[ns].info.master = 1;
 						list[ns].info.representor = 0;
 					} else {
-						list[ns].info.master = 0;
-						list[ns].info.representor = 1;
+						if (mlx5_ingnore_pf_representor(req_eth_da)) {
+							continue;
+						} else {
+							list[ns].info.master = 0;
+							list[ns].info.representor = 1;
+						}
 					}
 					/*
 					 * Ports of this type have uplink port index
-- 
2.51.0