[dpdk-dev] [PATCH v3 2/3] net/ring: create vdev from PMD specific API

[Ferruh Yigit]

When ring PMD created via PMD specific API instead of EAL abstraction
it is missing the virtual device creation done by EAL vdev.

And this makes eth_dev unusable exact same as other PMDs used, because
of some missing fields, like rte_device->name.

Now API creates a virtual device and sets proper fields, not all, and it
still won't be linked in the virtual device list eal keeps track. But
makes PMD usable in usual manner.

Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 drivers/net/ring/rte_eth_ring.c | 49 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ring/rte_eth_ring.c b/drivers/net/ring/rte_eth_ring.c
index 6feb137..a9355ff 100644
--- a/drivers/net/ring/rte_eth_ring.c
+++ b/drivers/net/ring/rte_eth_ring.c
@@ -365,6 +365,41 @@ do_eth_dev_ring_create(const char *name,
 	return -1;
 }
 
+static struct rte_vdev_device *
+alloc_vdev(const char *name)
+{
+	struct rte_devargs *devargs = NULL;
+	struct rte_vdev_device *vdev = NULL;
+	int ret;
+
+	devargs = calloc(1, sizeof(*devargs));
+	if (!devargs)
+		goto out_free;
+
+	vdev = calloc(1, sizeof(*vdev));
+	if (!vdev)
+		goto out_free;
+
+	devargs->type = RTE_DEVTYPE_VIRTUAL;
+	ret = snprintf(devargs->virt.drv_name, sizeof(devargs->virt.drv_name),
+			"%s", name);
+	if (ret < 0)
+		goto out_free;
+
+	vdev->device.devargs = devargs;
+	vdev->device.numa_node = SOCKET_ID_ANY;
+	vdev->device.name = devargs->virt.drv_name;
+
+	vdev->device.driver = &pmd_ring_drv.driver;
+
+	return vdev;
+
+out_free:
+	free(devargs);
+	free(vdev);
+	return NULL;
+}
+
 int
 rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 		const unsigned nb_rx_queues,
@@ -373,6 +408,8 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 		const unsigned numa_node)
 {
 	struct rte_eth_dev *eth_dev = NULL;
+	struct rte_vdev_device *vdev;
+	int ret;
 
 	/* do some parameter checking */
 	if (rx_queues == NULL && nb_rx_queues > 0) {
@@ -388,9 +425,19 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 		return -1;
 	}
 
-	return do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
+	vdev = alloc_vdev(name);
+	if (!vdev) {
+		rte_errno = EINVAL;
+		return -1;
+	}
+
+	ret = do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
 			tx_queues, nb_tx_queues, numa_node, DEV_ATTACH,
 			&eth_dev);
+
+	eth_dev->device = &vdev->device;
+
+	return ret;
 }
 
 int
-- 
2.9.4