[RFC 03/11] bus/dpaa: support unplug and use generic cleanup

[David Marchand <david.marchand@redhat.com>]

Add .unplug callback to handle driver removal and interrupt cleanup.
This enables use of the generic bus cleanup helper while preserving
bus-specific cleanup (portal finish, global init reset).

The cleanup function was already performing these operations, so it
seems safe to expose them through the unplug operation.

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 doc/guides/rel_notes/release_26_11.rst |  4 ++
 drivers/bus/dpaa/dpaa_bus.c            | 57 +++++++++++++++-----------
 2 files changed, 38 insertions(+), 23 deletions(-)

diff --git a/doc/guides/rel_notes/release_26_11.rst b/doc/guides/rel_notes/release_26_11.rst
index 938617ca75..ceb3bf0616 100644
--- a/doc/guides/rel_notes/release_26_11.rst
+++ b/doc/guides/rel_notes/release_26_11.rst
@@ -55,6 +55,10 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added unplug operation support to DPAA bus.**
+
+  Implemented device unplug operation to allow runtime removal of DPAA devices.
+
 
 Removed Items
 -------------
diff --git a/drivers/bus/dpaa/dpaa_bus.c b/drivers/bus/dpaa/dpaa_bus.c
index b9d7256c29..3dd372e600 100644
--- a/drivers/bus/dpaa/dpaa_bus.c
+++ b/drivers/bus/dpaa/dpaa_bus.c
@@ -795,36 +795,45 @@ dpaa_bus_probe_device(struct rte_driver *drv, struct rte_device *dev)
 }
 
 static int
-dpaa_bus_cleanup(struct rte_bus *bus)
+dpaa_bus_unplug_device(struct rte_device *rte_dev)
 {
-	struct rte_dpaa_device *dev;
+	const struct rte_dpaa_driver *drv = RTE_BUS_DRIVER(rte_dev->driver, *drv);
+	struct rte_dpaa_device *dev = RTE_BUS_DEVICE(rte_dev, *dev);
+	int ret = 0;
 
-	BUS_INIT_FUNC_TRACE();
-	RTE_BUS_FOREACH_DEV(dev, bus) {
-		const struct rte_dpaa_driver *drv;
-		int ret = 0;
-
-		if (!rte_dev_is_probed(&dev->device))
-			goto next;
-		drv = RTE_BUS_DRIVER(dev->device.driver, *drv);
-		if (drv->remove == NULL)
-			goto next;
+	if (drv->remove != NULL) {
 		ret = drv->remove(dev);
-		if (ret < 0) {
-			rte_errno = errno;
-			goto next;
-		}
-		dev->device.driver = NULL;
-next:
-		dpaa_close_intr(dev->intr_handle);
-		rte_intr_instance_free(dev->intr_handle);
-		dev->intr_handle = NULL;
+		if (ret < 0)
+			return ret;
 	}
+
+	dpaa_close_intr(dev->intr_handle);
+	rte_intr_instance_free(dev->intr_handle);
+	dev->intr_handle = NULL;
+
+	return 0;
+}
+
+static void
+dpaa_bus_free_device(struct rte_device *dev)
+{
+	free(RTE_BUS_DEVICE(dev, struct rte_dpaa_device));
+}
+
+static int
+dpaa_bus_cleanup(struct rte_bus *bus)
+{
+	int ret;
+
+	BUS_INIT_FUNC_TRACE();
+
+	ret = rte_bus_generic_cleanup(bus);
+
 	dpaa_portal_finish((void *)DPAA_PER_LCORE_PORTAL);
 	dpaa_bus_global_init = 0;
 	DPAA_BUS_DEBUG("Bus cleanup done");
 
-	return 0;
+	return ret;
 }
 
 /* Adding destructor for double check in case non-gracefully
@@ -850,14 +859,16 @@ RTE_FINI_PRIO(dpaa_cleanup, 102)
 static struct rte_bus rte_dpaa_bus = {
 	.scan = rte_dpaa_bus_scan,
 	.probe = rte_bus_generic_probe,
+	.free_device = dpaa_bus_free_device,
+	.cleanup = dpaa_bus_cleanup,
 	.parse = rte_dpaa_bus_parse,
 	.dev_compare = dpaa_bus_dev_compare,
 	.find_device = rte_bus_generic_find_device,
 	.get_iommu_class = rte_dpaa_get_iommu_class,
 	.match = dpaa_bus_match,
 	.probe_device = dpaa_bus_probe_device,
+	.unplug_device = dpaa_bus_unplug_device,
 	.dev_iterate = rte_bus_generic_dev_iterate,
-	.cleanup = dpaa_bus_cleanup,
 };
 
 static struct rte_dpaa_bus_private dpaa_bus = {
-- 
2.54.0