[PATCH v1] bus/ifpga: add fpga bus cleanup

[Wei Huang <wei.huang@intel.com>]

In this patch, cleanup method is implemented for FPGA bus
which will be called during eal_bus_cleanup().

Signed-off-by: Wei Huang <wei.huang@intel.com>
---
 drivers/bus/ifpga/ifpga_bus.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/bus/ifpga/ifpga_bus.c b/drivers/bus/ifpga/ifpga_bus.c
index 07e316b..ffb0c61 100644
--- a/drivers/bus/ifpga/ifpga_bus.c
+++ b/drivers/bus/ifpga/ifpga_bus.c
@@ -360,6 +360,41 @@ struct rte_afu_device *
 	return ret;
 }
 
+/*
+ * Cleanup the content of the Intel FPGA bus, and call the remove() function
+ * for all registered devices.
+ */
+static int
+ifpga_cleanup(void)
+{
+	struct rte_afu_device *afu_dev, *tmp_dev;
+	int error = 0;
+
+	RTE_TAILQ_FOREACH_SAFE(afu_dev, &ifpga_afu_dev_list, next, tmp_dev) {
+		struct rte_afu_driver *drv = afu_dev->driver;
+		int ret = 0;
+
+		if (drv == NULL || drv->remove == NULL)
+			goto free;
+
+		ret = drv->remove(afu_dev);
+		if (ret < 0) {
+			rte_errno = errno;
+			error = -1;
+		}
+		afu_dev->driver = NULL;
+		afu_dev->device.driver = NULL;
+
+free:
+		TAILQ_REMOVE(&ifpga_afu_dev_list, afu_dev, next);
+		rte_devargs_remove(afu_dev->device.devargs);
+		rte_intr_instance_free(afu_dev->intr_handle);
+		free(afu_dev);
+	}
+
+	return error;
+}
+
 static int
 ifpga_plug(struct rte_device *dev)
 {
@@ -470,6 +505,7 @@ struct rte_afu_device *
 static struct rte_bus rte_ifpga_bus = {
 	.scan        = ifpga_scan,
 	.probe       = ifpga_probe,
+	.cleanup     = ifpga_cleanup,
 	.find_device = ifpga_find_device,
 	.plug        = ifpga_plug,
 	.unplug      = ifpga_unplug,
-- 
1.8.3.1