[dpdk-dev] [PATCH v2 06/15] bus: add configuration interface for buses

[Jan Blunck <jblunck@infradead.org>]

Signed-off-by: Jan Blunck <jblunck@infradead.org>
---
 lib/librte_eal/bsdapp/eal/rte_eal_version.map   |  1 +
 lib/librte_eal/common/eal_common_bus.c          | 16 ++++++++++++++++
 lib/librte_eal/common/include/rte_bus.h         |  9 +++++++++
 lib/librte_eal/linuxapp/eal/rte_eal_version.map |  1 +
 4 files changed, 27 insertions(+)

diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index 381f895cd..82f64c386 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -206,6 +206,7 @@ DPDK_17.08 {
 EXPERIMENTAL {
 	global:
 
+	rte_eal_bus_configure;
 	rte_eal_devargs_parse;
 	rte_eal_hotplug_add;
 	rte_eal_hotplug_remove;
diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 08bec2d93..f5368a486 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -64,6 +64,22 @@ rte_bus_unregister(struct rte_bus *bus)
 	RTE_LOG(DEBUG, EAL, "Unregistered [%s] bus.\n", bus->name);
 }
 
+int rte_bus_configure(struct rte_bus *bus, const struct rte_bus_conf *conf)
+{
+	if (bus == NULL)
+		return -1;
+
+	/* only set bus scan policy if it was unset before */
+	if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
+		RTE_LOG(DEBUG, EAL, "Bus [%s] scan_mode=%d\n", bus->name,
+			conf->scan_mode);
+		bus->conf.scan_mode = conf->scan_mode;
+	} else if (bus->conf.scan_mode != conf->scan_mode)
+		return -1;
+
+	return 0;
+}
+
 /* Scan all the buses for registered devices */
 int
 rte_bus_scan(void)
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index af9f0e13f..ff67e6e93 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -206,6 +206,15 @@ void rte_bus_register(struct rte_bus *bus);
 void rte_bus_unregister(struct rte_bus *bus);
 
 /**
+ * Configure a Bus instance.
+ *
+ * @param bus
+ *   A pointer to a rte_bus structure describing the bus
+ *   to be configured.
+ */
+int rte_bus_configure(struct rte_bus *bus, const struct rte_bus_conf *conf);
+
+/**
  * Scan all the buses.
  *
  * @return
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index 0f9e009b6..8b8c382a7 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -211,6 +211,7 @@ DPDK_17.08 {
 EXPERIMENTAL {
 	global:
 
+	rte_eal_bus_configure;
 	rte_eal_devargs_parse;
 	rte_eal_hotplug_add;
 	rte_eal_hotplug_remove;
-- 
2.13.2