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path: root/drivers/net/mlx5/mlx5_ethdev.c
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Diffstat (limited to 'drivers/net/mlx5/mlx5_ethdev.c')
-rw-r--r--drivers/net/mlx5/mlx5_ethdev.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 9cf2dc5..4a24f80 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1321,3 +1321,56 @@ mlx5_dev_to_port_id(const struct rte_device *dev, uint16_t *port_list,
}
return n;
}
+
+/**
+ * Get switch information associated with network interface.
+ *
+ * @param ifindex
+ * Network interface index.
+ * @param[out] info
+ * Switch information object, populated in case of success.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
+{
+ char ifname[IF_NAMESIZE];
+ FILE *file;
+ struct mlx5_switch_info data = { .master = 0, };
+ bool port_name_set = false;
+ bool port_switch_id_set = false;
+ char c;
+
+ if (!if_indextoname(ifindex, ifname)) {
+ rte_errno = errno;
+ return -rte_errno;
+ }
+
+ MKSTR(phys_port_name, "/sys/class/net/%s/phys_port_name",
+ ifname);
+ MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id",
+ ifname);
+
+ file = fopen(phys_port_name, "rb");
+ if (file != NULL) {
+ port_name_set =
+ fscanf(file, "%d%c", &data.port_name, &c) == 2 &&
+ c == '\n';
+ fclose(file);
+ }
+ file = fopen(phys_switch_id, "rb");
+ if (file == NULL) {
+ rte_errno = errno;
+ return -rte_errno;
+ }
+ port_switch_id_set =
+ 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;
+ *info = data;
+ return 0;
+}