I've updated the null PMD to apply it to latest DPDK.
Also I've sent a port hotplug patch for null PMD.
Thanks,
Tetsuya
(2014/12/16 17:39), Tetsuya Mukawa wrote:
> 'null PMD' is a driver of the virtual device particulary designed to measure
> performance of DPDK PMDs. When an application call rx, null PMD just allocates
> mbufs and returns those. Also tx, the PMD just frees mbufs.
>
> The PMD has following options.
> - size: specify packe size allocated by RX. Default packet size is 64.
> - copy: specify 1 or 0 to enable or disable copy while RX and TX.
> Default value is 0(disbaled).
> This option is used for emulating more realistic data transfer.
> Copy size is equal to packet size.
>
> To use the PMD, enable CONFIG_RTE_BUILD_SHARED_LIB in config file. Then
> compile the PMD as shared library. The library can be linked using '-d'
> option when an application invokes.
>
> Here is an example.
> $ sudo ./testpmd -c f -n 4 -d librte_pmd_null.so \
> --vdev 'eth_null0' --vdev 'eth_null1' -- -i
>
> If testpmd is compiled with CONFIG_RTE_BUILD_SHARED_LIB, it may need to
> specify more libraries using '-d' option.
>
> Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
> ---
> config/common_bsdapp | 5 +
> config/common_linuxapp | 5 +
> lib/Makefile | 1 +
> lib/librte_pmd_null/Makefile | 58 +++++
> lib/librte_pmd_null/rte_eth_null.c | 474
> +++++++++++++++++++++++++++++++++++++
> 5 files changed, 543 insertions(+)
> create mode 100644 lib/librte_pmd_null/Makefile
> create mode 100644 lib/librte_pmd_null/rte_eth_null.c
>
> diff --git a/config/common_bsdapp b/config/common_bsdapp
> index 9177db1..fa849be 100644
> --- a/config/common_bsdapp
> +++ b/config/common_bsdapp
> @@ -224,6 +224,11 @@ CONFIG_RTE_LIBRTE_PMD_PCAP=y
> CONFIG_RTE_LIBRTE_PMD_BOND=y
>
> #
> +# Compile null PMD
> +#
> +CONFIG_RTE_LIBRTE_PMD_NULL=y
> +
> +#
> # Do prefetch of packet data within PMD driver receive function
> #
> CONFIG_RTE_PMD_PACKET_PREFETCH=y
> diff --git a/config/common_linuxapp b/config/common_linuxapp
> index 2f9643b..808574a 100644
> --- a/config/common_linuxapp
> +++ b/config/common_linuxapp
> @@ -232,6 +232,11 @@ CONFIG_RTE_LIBRTE_PMD_AF_PACKET=y
> CONFIG_RTE_LIBRTE_PMD_XENVIRT=n
>
> #
> +# Compile null PMD
> +#
> +CONFIG_RTE_LIBRTE_PMD_NULL=y
> +
> +#
> # Do prefetch of packet data within PMD driver receive function
> #
> CONFIG_RTE_PMD_PACKET_PREFETCH=y
> diff --git a/lib/Makefile b/lib/Makefile
> index 0ffc982..d246c53 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -52,6 +52,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += librte_pmd_virtio
> DIRS-$(CONFIG_RTE_LIBRTE_VMXNET3_PMD) += librte_pmd_vmxnet3
> DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += librte_pmd_xenvirt
> DIRS-$(CONFIG_RTE_LIBRTE_VHOST) += librte_vhost
> +DIRS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += librte_pmd_null
> DIRS-$(CONFIG_RTE_LIBRTE_HASH) += librte_hash
> DIRS-$(CONFIG_RTE_LIBRTE_LPM) += librte_lpm
> DIRS-$(CONFIG_RTE_LIBRTE_ACL) += librte_acl
> diff --git a/lib/librte_pmd_null/Makefile b/lib/librte_pmd_null/Makefile
> new file mode 100644
> index 0000000..0ec4db9
> --- /dev/null
> +++ b/lib/librte_pmd_null/Makefile
> @@ -0,0 +1,58 @@
> +# 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_SDK)/mk/rte.vars.mk
> +
> +#
> +# library name
> +#
> +LIB = librte_pmd_null.a
> +
> +CFLAGS += -O3
> +CFLAGS += $(WERROR_FLAGS)
> +
> +#
> +# all source are stored in SRCS-y
> +#
> +SRCS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += rte_eth_null.c
> +
> +#
> +# Export include files
> +#
> +SYMLINK-y-include +=
> +
> +# this lib depends upon:
> +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += lib/librte_mbuf
> +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += lib/librte_ether
> +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += lib/librte_malloc
> +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_NULL) += lib/librte_kvargs
> +
> +include $(RTE_SDK)/mk/rte.lib.mk
> diff --git a/lib/librte_pmd_null/rte_eth_null.c
> b/lib/librte_pmd_null/rte_eth_null.c
> new file mode 100644
> index 0000000..7ecdd17
> --- /dev/null
> +++ b/lib/librte_pmd_null/rte_eth_null.c
> @@ -0,0 +1,474 @@
> +/*-
> + * 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>
> +
> +#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 const *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[1];
> + struct null_queue tx_null_queues[1];
> +};
> +
> +
> +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 = 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 = 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 __rte_unused, uint16_t nb_bufs)
> +{
> + int i;
> + struct null_queue *h = q;
> +
> + 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 = 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 __rte_unused) { return 0; }
> +
> +static int
> +eth_dev_start(struct rte_eth_dev *dev)
> +{
> + dev->data->dev_link.link_status = 1;
> + return 0;
> +}
> +
> +static void
> +eth_dev_stop(struct rte_eth_dev *dev)
> +{
> + 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 __rte_unused)
> +{
> + struct rte_mbuf *dummy_packet;
> + struct pmd_internals *internals = dev->data->dev_private;
> + unsigned packet_size = internals->packet_size;
> +
> + if (rx_queue_id != 0)
> + return -ENODEV;
> +
> + 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 = dev->data->dev_private;
> + unsigned packet_size = internals->packet_size;
> +
> + if (tx_queue_id != 0)
> + return -ENODEV;
> +
> + 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 = 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 = (uint16_t)internals->nb_rx_queues;
> + dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
> + dev_info->min_rx_bufsize = 0;
> + dev_info->pci_dev = NULL;
> +}
> +
> +static void
> +eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
> +{
> + unsigned i;
> + unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
> + const struct pmd_internals *internal = dev->data->dev_private;
> +
> + memset(igb_stats, 0, sizeof(*igb_stats));
> + for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
> + i < internal->nb_rx_queues; i++) {
> + igb_stats->q_ipackets[i] =
> + internal->rx_null_queues[i].rx_pkts.cnt;
> + rx_total += igb_stats->q_ipackets[i];
> + }
> +
> + for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
> + i < internal->nb_tx_queues; 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 = dev->data->dev_private;
> +
> + for (i = 0; i < internal->nb_rx_queues; i++)
> + internal->rx_null_queues[i].rx_pkts.cnt = 0;
> + for (i = 0; i < internal->nb_tx_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 __rte_unused) { ; }
> +static int
> +eth_link_update(struct rte_eth_dev *dev __rte_unused,
> + int wait_to_complete __rte_unused) { return 0; }
> +
> +static 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,
> +};
> +
> +static int
> +eth_dev_null_create(const char *name __rte_unused,
> + 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 rte_pci_device *pci_dev = NULL;
> + struct pmd_internals *internals = NULL;
> + struct rte_eth_dev *eth_dev = NULL;
> +
> + 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;
> +
> + pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node);
> + if (pci_dev == 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);
> + if (eth_dev == NULL)
> + goto error;
> +
> + /* now put it all together
> + * - store queue data in internals,
> + * - store numa_node info in pci_driver
> + * - point eth_dev_data to internals and pci_driver
> + * - 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;
> +
> + pci_dev->numa_node = numa_node;
> +
> + 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 = ð_addr;
> +
> + eth_dev->data = data;
> + eth_dev->dev_ops = &ops;
> + eth_dev->pci_dev = pci_dev;
> +
> + /* 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:
> + if (data)
> + rte_free(data);
> + if (pci_dev)
> + rte_free(pci_dev);
> + if (internals)
> + 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;
> +
> + *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;
> +
> + *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;
> + int ret;
> +
> + RTE_LOG(INFO, PMD, "Initializing pmd_null for %s\n", name);
> +
> + numa_node = rte_socket_id();
> +
> + 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)
> + return -1;
> + }
> +
> + 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)
> + return -1;
> + }
> +
> + RTE_LOG(INFO, PMD, "Configure pmd_null: packet size is %d, "
> + "packet copy is %s\n", packet_size,
> + packet_copy ? "enabled" : "disabled");
> +
> + return eth_dev_null_create(name, numa_node, packet_size, packet_copy);
> +}
> +
> +static struct rte_driver pmd_null_drv = {
> + .name = "eth_null",
> + .type = PMD_VDEV,
> + .init = rte_pmd_null_devinit,
> +};
> +
> +PMD_REGISTER_DRIVER(pmd_null_drv);
