[dpdk-dev] [PATCH 9/9] ethdev: Use embedded rte_device to detach driver

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

From: 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_dev.c        | 43 ++++++++++++++++-----------
 lib/librte_eal/common/include/rte_dev.h       | 11 +++++++
 lib/librte_ether/rte_ethdev.c                 |  3 +-
 4 files changed, 39 insertions(+), 19 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index 21640d6..150b0f7 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -162,6 +162,7 @@ DPDK_17.02 {
 DPDK_17.05 {
 	global:
 
+	rte_eal_device_detach;
 	rte_bus_find;
 	rte_bus_find_by_device;
 	rte_bus_find_device;
diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index c2d0f8d..829d7f3 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -100,6 +100,30 @@ int rte_eal_dev_attach(const char *name, const char *devargs)
 	return ret;
 }
 
+int rte_eal_device_detach(struct rte_device *dev)
+{
+	struct rte_bus *bus;
+	int ret;
+
+	bus = rte_bus_find_by_device(dev);
+	if (!bus) {
+		RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
+			dev->name);
+		return -EINVAL;
+	}
+
+	if (!bus->detach) {
+		RTE_LOG(ERR, EAL, "Bus function not supported\n");
+		return -ENOTSUP;
+	}
+
+	ret = bus->detach(dev);
+	if (ret)
+		RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
+			dev->name);
+	return ret;
+}
+
 static int cmp_dev_name(const struct rte_device *dev, const void *_name)
 {
 	const char *name = _name;
@@ -110,8 +134,6 @@ static int cmp_dev_name(const struct rte_device *dev, const void *_name)
 int rte_eal_dev_detach(const char *name)
 {
 	struct rte_device *dev;
-	struct rte_bus *bus;
-	int ret;
 
 	if (name == NULL) {
 		RTE_LOG(ERR, EAL, "Invalid device provided.\n");
@@ -124,20 +146,5 @@ int rte_eal_dev_detach(const char *name)
 		return -EINVAL;
 	}
 
-	bus = rte_bus_find_by_device(dev);
-	if (!bus) {
-		RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n", name);
-		return -EINVAL;
-	}
-
-	if (!bus->detach) {
-		RTE_LOG(ERR, EAL, "Bus function not supported\n");
-		return -ENOTSUP;
-	}
-
-	ret = bus->detach(dev);
-	if (ret)
-		RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
-			name);
-	return ret;
+	return rte_eal_device_detach(dev);
 }
diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
index de20c06..7092b16 100644
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -123,6 +123,17 @@ struct rte_mem_resource {
 	void *addr;         /**< Virtual address, NULL when not mapped. */
 };
 
+/* FIXME: Forward declare */
+struct rte_device;
+
+/**
+ * Unplug the device from the device driver.
+ *
+ * @param dev
+ *   A pointer to a rte_device structure.
+ */
+int rte_eal_device_detach(struct rte_device *dev);
+
 /**
  * A structure describing a device driver.
  */
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 83898a8..ff4f5ab 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -440,7 +440,8 @@ rte_eth_dev_detach(uint8_t port_id, char *name)
 
 	snprintf(name, sizeof(rte_eth_devices[port_id].data->name),
 		 "%s", rte_eth_devices[port_id].data->name);
-	ret = rte_eal_dev_detach(name);
+
+	ret = rte_eal_device_detach(rte_eth_devices[0].device);
 	if (ret < 0)
 		goto err;
 
-- 
2.1.4