return NULL;
}
+/* Assign the default CPU port (the first one in the tree) to all ports of the
+ * fabric which don't already have one as part of their own switch.
+ */
static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
{
struct dsa_port *cpu_dp, *dp;
return -EINVAL;
}
- /* Assign the default CPU port to all ports of the fabric */
- list_for_each_entry(dp, &dst->ports, list)
+ list_for_each_entry(dp, &dst->ports, list) {
+ if (dp->cpu_dp)
+ continue;
+
if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
dp->cpu_dp = cpu_dp;
+ }
return 0;
}
+/* Perform initial assignment of CPU ports to user ports and DSA links in the
+ * fabric, giving preference to CPU ports local to each switch. Default to
+ * using the first CPU port in the switch tree if the port does not have a CPU
+ * port local to this switch.
+ */
+static int dsa_tree_setup_cpu_ports(struct dsa_switch_tree *dst)
+{
+ struct dsa_port *cpu_dp, *dp;
+
+ list_for_each_entry(cpu_dp, &dst->ports, list) {
+ if (!dsa_port_is_cpu(cpu_dp))
+ continue;
+
+ list_for_each_entry(dp, &dst->ports, list) {
+ /* Prefer a local CPU port */
+ if (dp->ds != cpu_dp->ds)
+ continue;
+
+ /* Prefer the first local CPU port found */
+ if (dp->cpu_dp)
+ continue;
+
+ if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
+ dp->cpu_dp = cpu_dp;
+ }
+ }
+
+ return dsa_tree_setup_default_cpu(dst);
+}
+
static void dsa_tree_teardown_cpu_ports(struct dsa_switch_tree *dst)
{
struct dsa_port *dp;
if (!complete)
return 0;
- err = dsa_tree_setup_default_cpu(dst);
+ err = dsa_tree_setup_cpu_ports(dst);
if (err)
return err;