bus: add scanning

[dpdk.git] / lib / librte_eal / common / eal_common_bus.c

diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index e9b1470..ef10390 100644 (file)
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -47,6 +47,8 @@ rte_bus_register(struct rte_bus *bus)
 {
        RTE_VERIFY(bus);
        RTE_VERIFY(bus->name && strlen(bus->name));
+       /* A bus should mandatorily have the scan implemented */
+       RTE_VERIFY(bus->scan);
 
        TAILQ_INSERT_TAIL(&rte_bus_list, bus, next);
        RTE_LOG(DEBUG, EAL, "Registered [%s] bus.\n", bus->name);
@@ -59,6 +61,25 @@ rte_bus_unregister(struct rte_bus *bus)
        RTE_LOG(DEBUG, EAL, "Unregistered [%s] bus.\n", bus->name);
 }
 
+/* Scan all the buses for registered devices */
+int
+rte_bus_scan(void)
+{
+       int ret;
+       struct rte_bus *bus = NULL;
+
+       TAILQ_FOREACH(bus, &rte_bus_list, next) {
+               ret = bus->scan();
+               if (ret) {
+                       RTE_LOG(ERR, EAL, "Scan for (%s) bus failed.\n",
+                               bus->name);
+                       return ret;
+               }
+       }
+
+       return 0;
+}
+
 /* Dump information of a single bus */
 static int
 bus_dump_one(FILE *f, struct rte_bus *bus)