[dpdk-dev] [PATCH 5/9] bus: introduce attach/detach functionality

[Gaetan Rivet <gaetan.rivet@6wind.com>]

From: Jan Blunck <jblunck@infradead.org>

Signed-off-by: Jan Blunck <jblunck@infradead.org>
---
 lib/librte_eal/common/eal_common_bus.c  |  3 +++
 lib/librte_eal/common/include/rte_bus.h | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index b8f8384..9fda287 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -52,6 +52,9 @@ rte_bus_register(struct rte_bus *bus)
 	RTE_VERIFY(bus->probe);
 	RTE_VERIFY(bus->find_device);
 
+	/* Buses supporting attach also require detach */
+	RTE_VERIFY(!bus->attach || bus->detach);
+
 	TAILQ_INSERT_TAIL(&rte_bus_list, bus, next);
 	RTE_LOG(DEBUG, EAL, "Registered [%s] bus.\n", bus->name);
 }
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index 3b22fb8..201b0ff 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -89,6 +89,20 @@ typedef struct rte_device * (*rte_bus_find_device_t)(
 	const void *data);
 
 /**
+ * Implementation specific probe function which is responsible for linking
+ * devices on that bus with applicable drivers.
+ *
+ */
+typedef int (*rte_bus_attach_t)(struct rte_device *dev);
+
+/**
+ * Implementation specific remove function which is responsible for unlinking
+ * devices on that bus from assigned driver.
+ *
+ */
+typedef int (*rte_bus_detach_t)(struct rte_device *dev);
+
+/**
  * A structure describing a generic bus.
  */
 struct rte_bus {
@@ -97,6 +111,8 @@ struct rte_bus {
 	rte_bus_scan_t scan;         /**< Scan for devices attached to bus */
 	rte_bus_probe_t probe;       /**< Probe devices on bus */
 	rte_bus_find_device_t find_device; /**< Find device on bus */
+	rte_bus_attach_t attach;     /**< Probe single device for drivers */
+	rte_bus_detach_t detach;     /**< Remove single device from driver */
 };
 
 /**
-- 
2.1.4