common/mlx5: share Netlink commands

[dpdk.git] / drivers / common / mlx5 / mlx5_common.c

diff --git a/drivers/common/mlx5/mlx5_common.c b/drivers/common/mlx5/mlx5_common.c
index 57d72b4..99d15cd 100644 (file)
--- a/drivers/common/mlx5/mlx5_common.c
+++ b/drivers/common/mlx5/mlx5_common.c
@@ -105,6 +105,61 @@ mlx5_class_get(struct rte_devargs *devargs)
        return ret;
 }
 
+/**
+ * Extract port name, as a number, from sysfs or netlink information.
+ *
+ * @param[in] port_name_in
+ *   String representing the port name.
+ * @param[out] port_info_out
+ *   Port information, including port name as a number and port name
+ *   type if recognized
+ *
+ * @return
+ *   port_name field set according to recognized name format.
+ */
+void
+mlx5_translate_port_name(const char *port_name_in,
+                        struct mlx5_switch_info *port_info_out)
+{
+       char pf_c1, pf_c2, vf_c1, vf_c2;
+       char *end;
+       int sc_items;
+
+       /*
+        * Check for port-name as a string of the form pf0vf0
+        * (support kernel ver >= 5.0 or OFED ver >= 4.6).
+        */
+       sc_items = sscanf(port_name_in, "%c%c%d%c%c%d",
+                         &pf_c1, &pf_c2, &port_info_out->pf_num,
+                         &vf_c1, &vf_c2, &port_info_out->port_name);
+       if (sc_items == 6 &&
+           pf_c1 == 'p' && pf_c2 == 'f' &&
+           vf_c1 == 'v' && vf_c2 == 'f') {
+               port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFVF;
+               return;
+       }
+       /*
+        * Check for port-name as a string of the form p0
+        * (support kernel ver >= 5.0, or OFED ver >= 4.6).
+        */
+       sc_items = sscanf(port_name_in, "%c%d",
+                         &pf_c1, &port_info_out->port_name);
+       if (sc_items == 2 && pf_c1 == 'p') {
+               port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK;
+               return;
+       }
+       /* Check for port-name as a number (support kernel ver < 5.0 */
+       errno = 0;
+       port_info_out->port_name = strtol(port_name_in, &end, 0);
+       if (!errno &&
+           (size_t)(end - port_name_in) == strlen(port_name_in)) {
+               port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_LEGACY;
+               return;
+       }
+       port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN;
+       return;
+}
+
 #ifdef RTE_IBVERBS_LINK_DLOPEN
 
 /**