1 files changed, 703 insertions, 0 deletions

diff --git a/src/dpdk22/drivers/net/null/rte_eth_null.c b/src/dpdk22/drivers/net/null/rte_eth_null.c
new file mode 100644
index 00000000..77fc9883
--- /dev/null
+++ b/src/dpdk22/drivers/net/null/rte_eth_null.c
@@ -0,0 +1,703 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (C) IGEL Co.,Ltd.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of IGEL Co.,Ltd. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_memcpy.h>
+#include <rte_dev.h>
+#include <rte_kvargs.h>
+#include <rte_spinlock.h>
+
+#include "rte_eth_null.h"
+
+#define ETH_NULL_PACKET_SIZE_ARG	"size"
+#define ETH_NULL_PACKET_COPY_ARG	"copy"
+
+static unsigned default_packet_size = 64;
+static unsigned default_packet_copy;
+
+static const char *valid_arguments[] = {
+	ETH_NULL_PACKET_SIZE_ARG,
+	ETH_NULL_PACKET_COPY_ARG,
+	NULL
+};
+
+struct pmd_internals;
+
+struct null_queue {
+	struct pmd_internals *internals;
+
+	struct rte_mempool *mb_pool;
+	struct rte_mbuf *dummy_packet;
+
+	rte_atomic64_t rx_pkts;
+	rte_atomic64_t tx_pkts;
+	rte_atomic64_t err_pkts;
+};
+
+struct pmd_internals {
+	unsigned packet_size;
+	unsigned packet_copy;
+	unsigned numa_node;
+
+	unsigned nb_rx_queues;
+	unsigned nb_tx_queues;
+
+	struct null_queue rx_null_queues[RTE_MAX_QUEUES_PER_PORT];
+	struct null_queue tx_null_queues[RTE_MAX_QUEUES_PER_PORT];
+
+	/** Bit mask of RSS offloads, the bit offset also means flow type */
+	uint64_t flow_type_rss_offloads;
+
+	rte_spinlock_t rss_lock;
+
+	uint16_t reta_size;
+	struct rte_eth_rss_reta_entry64 reta_conf[ETH_RSS_RETA_SIZE_128 /
+			RTE_RETA_GROUP_SIZE];
+
+	uint8_t rss_key[40];                /**< 40-byte hash key. */
+};
+
+
+static struct ether_addr eth_addr = { .addr_bytes = {0} };
+static const char *drivername = "Null PMD";
+static struct rte_eth_link pmd_link = {
+	.link_speed = 10000,
+	.link_duplex = ETH_LINK_FULL_DUPLEX,
+	.link_status = 0
+};
+
+static uint16_t
+eth_null_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+	int i;
+	struct null_queue *h = q;
+	unsigned packet_size;
+
+	if ((q == NULL) || (bufs == NULL))
+		return 0;
+
+	packet_size = h->internals->packet_size;
+	for (i = 0; i < nb_bufs; i++) {
+		bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
+		if (!bufs[i])
+			break;
+		bufs[i]->data_len = (uint16_t)packet_size;
+		bufs[i]->pkt_len = packet_size;
+		bufs[i]->nb_segs = 1;
+		bufs[i]->next = NULL;
+	}
+
+	rte_atomic64_add(&(h->rx_pkts), i);
+
+	return i;
+}
+
+static uint16_t
+eth_null_copy_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+	int i;
+	struct null_queue *h = q;
+	unsigned packet_size;
+
+	if ((q == NULL) || (bufs == NULL))
+		return 0;
+
+	packet_size = h->internals->packet_size;
+	for (i = 0; i < nb_bufs; i++) {
+		bufs[i] = rte_pktmbuf_alloc(h->mb_pool);
+		if (!bufs[i])
+			break;
+		rte_memcpy(rte_pktmbuf_mtod(bufs[i], void *), h->dummy_packet,
+					packet_size);
+		bufs[i]->data_len = (uint16_t)packet_size;
+		bufs[i]->pkt_len = packet_size;
+		bufs[i]->nb_segs = 1;
+		bufs[i]->next = NULL;
+	}
+
+	rte_atomic64_add(&(h->rx_pkts), i);
+
+	return i;
+}
+
+static uint16_t
+eth_null_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+	int i;
+	struct null_queue *h = q;
+
+	if ((q == NULL) || (bufs == NULL))
+		return 0;
+
+	for (i = 0; i < nb_bufs; i++)
+		rte_pktmbuf_free(bufs[i]);
+
+	rte_atomic64_add(&(h->tx_pkts), i);
+
+	return i;
+}
+
+static uint16_t
+eth_null_copy_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+	int i;
+	struct null_queue *h = q;
+	unsigned packet_size;
+
+	if ((q == NULL) || (bufs == NULL))
+		return 0;
+
+	packet_size = h->internals->packet_size;
+	for (i = 0; i < nb_bufs; i++) {
+		rte_memcpy(h->dummy_packet, rte_pktmbuf_mtod(bufs[i], void *),
+					packet_size);
+		rte_pktmbuf_free(bufs[i]);
+	}
+
+	rte_atomic64_add(&(h->tx_pkts), i);
+
+	return i;
+}
+
+static int
+eth_dev_configure(struct rte_eth_dev *dev) {
+	struct pmd_internals *internals;
+
+	internals = dev->data->dev_private;
+	internals->nb_rx_queues = dev->data->nb_rx_queues;
+	internals->nb_tx_queues = dev->data->nb_tx_queues;
+
+	return 0;
+}
+
+static int
+eth_dev_start(struct rte_eth_dev *dev)
+{
+	if (dev == NULL)
+		return -EINVAL;
+
+	dev->data->dev_link.link_status = 1;
+	return 0;
+}
+
+static void
+eth_dev_stop(struct rte_eth_dev *dev)
+{
+	if (dev == NULL)
+		return;
+
+	dev->data->dev_link.link_status = 0;
+}
+
+static int
+eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
+		uint16_t nb_rx_desc __rte_unused,
+		unsigned int socket_id __rte_unused,
+		const struct rte_eth_rxconf *rx_conf __rte_unused,
+		struct rte_mempool *mb_pool)
+{
+	struct rte_mbuf *dummy_packet;
+	struct pmd_internals *internals;
+	unsigned packet_size;
+
+	if ((dev == NULL) || (mb_pool == NULL))
+		return -EINVAL;
+
+	internals = dev->data->dev_private;
+
+	if (rx_queue_id >= internals->nb_rx_queues)
+		return -ENODEV;
+
+	packet_size = internals->packet_size;
+
+	internals->rx_null_queues[rx_queue_id].mb_pool = mb_pool;
+	dev->data->rx_queues[rx_queue_id] =
+		&internals->rx_null_queues[rx_queue_id];
+	dummy_packet = rte_zmalloc_socket(NULL,
+			packet_size, 0, internals->numa_node);
+	if (dummy_packet == NULL)
+		return -ENOMEM;
+
+	internals->rx_null_queues[rx_queue_id].internals = internals;
+	internals->rx_null_queues[rx_queue_id].dummy_packet = dummy_packet;
+
+	return 0;
+}
+
+static int
+eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
+		uint16_t nb_tx_desc __rte_unused,
+		unsigned int socket_id __rte_unused,
+		const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+	struct rte_mbuf *dummy_packet;
+	struct pmd_internals *internals;
+	unsigned packet_size;
+
+	if (dev == NULL)
+		return -EINVAL;
+
+	internals = dev->data->dev_private;
+
+	if (tx_queue_id >= internals->nb_tx_queues)
+		return -ENODEV;
+
+	packet_size = internals->packet_size;
+
+	dev->data->tx_queues[tx_queue_id] =
+		&internals->tx_null_queues[tx_queue_id];
+	dummy_packet = rte_zmalloc_socket(NULL,
+			packet_size, 0, internals->numa_node);
+	if (dummy_packet == NULL)
+		return -ENOMEM;
+
+	internals->tx_null_queues[tx_queue_id].internals = internals;
+	internals->tx_null_queues[tx_queue_id].dummy_packet = dummy_packet;
+
+	return 0;
+}
+
+
+static void
+eth_dev_info(struct rte_eth_dev *dev,
+		struct rte_eth_dev_info *dev_info)
+{
+	struct pmd_internals *internals;
+
+	if ((dev == NULL) || (dev_info == NULL))
+		return;
+
+	internals = dev->data->dev_private;
+	dev_info->driver_name = drivername;
+	dev_info->max_mac_addrs = 1;
+	dev_info->max_rx_pktlen = (uint32_t)-1;
+	dev_info->max_rx_queues = RTE_DIM(internals->rx_null_queues);
+	dev_info->max_tx_queues = RTE_DIM(internals->tx_null_queues);
+	dev_info->min_rx_bufsize = 0;
+	dev_info->pci_dev = NULL;
+	dev_info->reta_size = internals->reta_size;
+	dev_info->flow_type_rss_offloads = internals->flow_type_rss_offloads;
+}
+
+static void
+eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
+{
+	unsigned i, num_stats;
+	unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
+	const struct pmd_internals *internal;
+
+	if ((dev == NULL) || (igb_stats == NULL))
+		return;
+
+	internal = dev->data->dev_private;
+	num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
+			RTE_MIN(internal->nb_rx_queues,
+				RTE_DIM(internal->rx_null_queues)));
+	for (i = 0; i < num_stats; i++) {
+		igb_stats->q_ipackets[i] =
+			internal->rx_null_queues[i].rx_pkts.cnt;
+		rx_total += igb_stats->q_ipackets[i];
+	}
+
+	num_stats = RTE_MIN((unsigned)RTE_ETHDEV_QUEUE_STAT_CNTRS,
+			RTE_MIN(internal->nb_tx_queues,
+				RTE_DIM(internal->tx_null_queues)));
+	for (i = 0; i < num_stats; i++) {
+		igb_stats->q_opackets[i] =
+			internal->tx_null_queues[i].tx_pkts.cnt;
+		igb_stats->q_errors[i] =
+			internal->tx_null_queues[i].err_pkts.cnt;
+		tx_total += igb_stats->q_opackets[i];
+		tx_err_total += igb_stats->q_errors[i];
+	}
+
+	igb_stats->ipackets = rx_total;
+	igb_stats->opackets = tx_total;
+	igb_stats->oerrors = tx_err_total;
+}
+
+static void
+eth_stats_reset(struct rte_eth_dev *dev)
+{
+	unsigned i;
+	struct pmd_internals *internal;
+
+	if (dev == NULL)
+		return;
+
+	internal = dev->data->dev_private;
+	for (i = 0; i < RTE_DIM(internal->rx_null_queues); i++)
+		internal->rx_null_queues[i].rx_pkts.cnt = 0;
+	for (i = 0; i < RTE_DIM(internal->tx_null_queues); i++) {
+		internal->tx_null_queues[i].tx_pkts.cnt = 0;
+		internal->tx_null_queues[i].err_pkts.cnt = 0;
+	}
+}
+
+static void
+eth_queue_release(void *q)
+{
+	struct null_queue *nq;
+
+	if (q == NULL)
+		return;
+
+	nq = q;
+	rte_free(nq->dummy_packet);
+}
+
+static int
+eth_link_update(struct rte_eth_dev *dev __rte_unused,
+		int wait_to_complete __rte_unused) { return 0; }
+
+static int
+eth_rss_reta_update(struct rte_eth_dev *dev,
+		struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
+{
+	int i, j;
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	if (reta_size != internal->reta_size)
+		return -EINVAL;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	/* Copy RETA table */
+	for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
+		internal->reta_conf[i].mask = reta_conf[i].mask;
+		for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
+			if ((reta_conf[i].mask >> j) & 0x01)
+				internal->reta_conf[i].reta[j] = reta_conf[i].reta[j];
+	}
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static int
+eth_rss_reta_query(struct rte_eth_dev *dev,
+		struct rte_eth_rss_reta_entry64 *reta_conf, uint16_t reta_size)
+{
+	int i, j;
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	if (reta_size != internal->reta_size)
+		return -EINVAL;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	/* Copy RETA table */
+	for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
+		for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
+			if ((reta_conf[i].mask >> j) & 0x01)
+				reta_conf[i].reta[j] = internal->reta_conf[i].reta[j];
+	}
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static int
+eth_rss_hash_update(struct rte_eth_dev *dev, struct rte_eth_rss_conf *rss_conf)
+{
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	if ((rss_conf->rss_hf & internal->flow_type_rss_offloads) != 0)
+		dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
+				rss_conf->rss_hf & internal->flow_type_rss_offloads;
+
+	if (rss_conf->rss_key)
+		rte_memcpy(internal->rss_key, rss_conf->rss_key, 40);
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static int
+eth_rss_hash_conf_get(struct rte_eth_dev *dev,
+		struct rte_eth_rss_conf *rss_conf)
+{
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
+	if (rss_conf->rss_key)
+		rte_memcpy(rss_conf->rss_key, internal->rss_key, 40);
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static const struct eth_dev_ops ops = {
+	.dev_start = eth_dev_start,
+	.dev_stop = eth_dev_stop,
+	.dev_configure = eth_dev_configure,
+	.dev_infos_get = eth_dev_info,
+	.rx_queue_setup = eth_rx_queue_setup,
+	.tx_queue_setup = eth_tx_queue_setup,
+	.rx_queue_release = eth_queue_release,
+	.tx_queue_release = eth_queue_release,
+	.link_update = eth_link_update,
+	.stats_get = eth_stats_get,
+	.stats_reset = eth_stats_reset,
+	.reta_update = eth_rss_reta_update,
+	.reta_query = eth_rss_reta_query,
+	.rss_hash_update = eth_rss_hash_update,
+	.rss_hash_conf_get = eth_rss_hash_conf_get
+};
+
+int
+eth_dev_null_create(const char *name,
+		const unsigned numa_node,
+		unsigned packet_size,
+		unsigned packet_copy)
+{
+	const unsigned nb_rx_queues = 1;
+	const unsigned nb_tx_queues = 1;
+	struct rte_eth_dev_data *data = NULL;
+	struct pmd_internals *internals = NULL;
+	struct rte_eth_dev *eth_dev = NULL;
+
+	static const uint8_t default_rss_key[40] = {
+		0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, 0x41, 0x67, 0x25, 0x3D,
+		0x43, 0xA3, 0x8F, 0xB0, 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
+		0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, 0x6A, 0x42, 0xB7, 0x3B,
+		0xBE, 0xAC, 0x01, 0xFA
+	};
+
+	if (name == NULL)
+		return -EINVAL;
+
+	RTE_LOG(INFO, PMD, "Creating null ethdev on numa socket %u\n",
+			numa_node);
+
+	/* now do all data allocation - for eth_dev structure, dummy pci driver
+	 * and internal (private) data
+	 */
+	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+	if (data == NULL)
+		goto error;
+
+	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
+	if (internals == NULL)
+		goto error;
+
+	/* reserve an ethdev entry */
+	eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
+	if (eth_dev == NULL)
+		goto error;
+
+	/* now put it all together
+	 * - store queue data in internals,
+	 * - store numa_node info in ethdev data
+	 * - point eth_dev_data to internals
+	 * - and point eth_dev structure to new eth_dev_data structure
+	 */
+	/* NOTE: we'll replace the data element, of originally allocated eth_dev
+	 * so the nulls are local per-process */
+
+	internals->nb_rx_queues = nb_rx_queues;
+	internals->nb_tx_queues = nb_tx_queues;
+	internals->packet_size = packet_size;
+	internals->packet_copy = packet_copy;
+	internals->numa_node = numa_node;
+
+	internals->flow_type_rss_offloads =  ETH_RSS_PROTO_MASK;
+	internals->reta_size = RTE_DIM(internals->reta_conf) * RTE_RETA_GROUP_SIZE;
+
+	rte_memcpy(internals->rss_key, default_rss_key, 40);
+
+	data->dev_private = internals;
+	data->port_id = eth_dev->data->port_id;
+	data->nb_rx_queues = (uint16_t)nb_rx_queues;
+	data->nb_tx_queues = (uint16_t)nb_tx_queues;
+	data->dev_link = pmd_link;
+	data->mac_addrs = &eth_addr;
+	strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name));
+
+	eth_dev->data = data;
+	eth_dev->dev_ops = &ops;
+
+	TAILQ_INIT(&eth_dev->link_intr_cbs);
+
+	eth_dev->driver = NULL;
+	eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
+	eth_dev->data->kdrv = RTE_KDRV_NONE;
+	eth_dev->data->drv_name = drivername;
+	eth_dev->data->numa_node = numa_node;
+
+	/* finally assign rx and tx ops */
+	if (packet_copy) {
+		eth_dev->rx_pkt_burst = eth_null_copy_rx;
+		eth_dev->tx_pkt_burst = eth_null_copy_tx;
+	} else {
+		eth_dev->rx_pkt_burst = eth_null_rx;
+		eth_dev->tx_pkt_burst = eth_null_tx;
+	}
+
+	return 0;
+
+error:
+	rte_free(data);
+	rte_free(internals);
+
+	return -1;
+}
+
+static inline int
+get_packet_size_arg(const char *key __rte_unused,
+		const char *value, void *extra_args)
+{
+	const char *a = value;
+	unsigned *packet_size = extra_args;
+
+	if ((value == NULL) || (extra_args == NULL))
+		return -EINVAL;
+
+	*packet_size = (unsigned)strtoul(a, NULL, 0);
+	if (*packet_size == UINT_MAX)
+		return -1;
+
+	return 0;
+}
+
+static inline int
+get_packet_copy_arg(const char *key __rte_unused,
+		const char *value, void *extra_args)
+{
+	const char *a = value;
+	unsigned *packet_copy = extra_args;
+
+	if ((value == NULL) || (extra_args == NULL))
+		return -EINVAL;
+
+	*packet_copy = (unsigned)strtoul(a, NULL, 0);
+	if (*packet_copy == UINT_MAX)
+		return -1;
+
+	return 0;
+}
+
+static int
+rte_pmd_null_devinit(const char *name, const char *params)
+{
+	unsigned numa_node;
+	unsigned packet_size = default_packet_size;
+	unsigned packet_copy = default_packet_copy;
+	struct rte_kvargs *kvlist = NULL;
+	int ret;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	RTE_LOG(INFO, PMD, "Initializing pmd_null for %s\n", name);
+
+	numa_node = rte_socket_id();
+
+	if (params != NULL) {
+		kvlist = rte_kvargs_parse(params, valid_arguments);
+		if (kvlist == NULL)
+			return -1;
+
+		if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_SIZE_ARG) == 1) {
+
+			ret = rte_kvargs_process(kvlist,
+					ETH_NULL_PACKET_SIZE_ARG,
+					&get_packet_size_arg, &packet_size);
+			if (ret < 0)
+				goto free_kvlist;
+		}
+
+		if (rte_kvargs_count(kvlist, ETH_NULL_PACKET_COPY_ARG) == 1) {
+
+			ret = rte_kvargs_process(kvlist,
+					ETH_NULL_PACKET_COPY_ARG,
+					&get_packet_copy_arg, &packet_copy);
+			if (ret < 0)
+				goto free_kvlist;
+		}
+	}
+
+	RTE_LOG(INFO, PMD, "Configure pmd_null: packet size is %d, "
+			"packet copy is %s\n", packet_size,
+			packet_copy ? "enabled" : "disabled");
+
+	ret = eth_dev_null_create(name, numa_node, packet_size, packet_copy);
+
+free_kvlist:
+	if (kvlist)
+		rte_kvargs_free(kvlist);
+	return ret;
+}
+
+static int
+rte_pmd_null_devuninit(const char *name)
+{
+	struct rte_eth_dev *eth_dev = NULL;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	RTE_LOG(INFO, PMD, "Closing null ethdev on numa socket %u\n",
+			rte_socket_id());
+
+	/* find the ethdev entry */
+	eth_dev = rte_eth_dev_allocated(name);
+	if (eth_dev == NULL)
+		return -1;
+
+	rte_free(eth_dev->data->dev_private);
+	rte_free(eth_dev->data);
+
+	rte_eth_dev_release_port(eth_dev);
+
+	return 0;
+}
+
+static struct rte_driver pmd_null_drv = {
+	.name = "eth_null",
+	.type = PMD_VDEV,
+	.init = rte_pmd_null_devinit,
+	.uninit = rte_pmd_null_devuninit,
+};
+
+PMD_REGISTER_DRIVER(pmd_null_drv);