net/mlx5: add representor recognition on Linux 5.x

[dpdk.git] / drivers / net / mlx5 / mlx5_ethdev.c

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 2e8a296..933839c 100644 (file)
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1362,8 +1362,10 @@ mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
                .port_name = 0,
                .switch_id = 0,
        };
+       DIR *dir;
        bool port_name_set = false;
        bool port_switch_id_set = false;
+       bool device_dir = false;
        char c;
        int ret;
 
@@ -1376,6 +1378,8 @@ mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
              ifname);
        MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id",
              ifname);
+       MKSTR(pci_device, "/sys/class/net/%s/device",
+             ifname);
 
        file = fopen(phys_port_name, "rb");
        if (file != NULL) {
@@ -1394,9 +1398,21 @@ mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
                fscanf(file, "%" SCNx64 "%c", &data.switch_id, &c) == 2 &&
                c == '\n';
        fclose(file);
-       data.master = port_switch_id_set && !port_name_set;
-       data.representor = port_switch_id_set && port_name_set;
+       dir = opendir(pci_device);
+       if (dir != NULL) {
+               closedir(dir);
+               device_dir = true;
+       }
+       data.master = port_switch_id_set && (!port_name_set || device_dir);
+       data.representor = port_switch_id_set && port_name_set && !device_dir;
        *info = data;
+       assert(!(data.master && data.representor));
+       if (data.master && data.representor) {
+               DRV_LOG(ERR, "ifindex %u device is recognized as master"
+                            " and as representor", ifindex);
+               rte_errno = ENODEV;
+               return -rte_errno;
+       }
        return 0;
 }