[dpdk-dev] [PATCH 4/4] examples/ntb: support more functions for NTB

[Xiaoyun Li <xiaoyun.li@intel.com>]

Support to transmit files between two systems.
Support iofwd between one ethdev and NTB device.
Support rxonly and txonly for NTB device.
Support to set forwarding mode as file-trans, txonly,
rxonly or iofwd.
Support to show/clear port stats and throughput.

Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
---
 doc/guides/sample_app_ug/ntb.rst |   59 +-
 examples/ntb/meson.build         |    3 +
 examples/ntb/ntb_fwd.c           | 1297 +++++++++++++++++++++++++++---
 3 files changed, 1231 insertions(+), 128 deletions(-)

diff --git a/doc/guides/sample_app_ug/ntb.rst b/doc/guides/sample_app_ug/ntb.rst
index 079242175..f8291d7d1 100644
--- a/doc/guides/sample_app_ug/ntb.rst
+++ b/doc/guides/sample_app_ug/ntb.rst
@@ -5,8 +5,17 @@ NTB Sample Application
 ======================
 
 The ntb sample application shows how to use ntb rawdev driver.
-This sample provides interactive mode to transmit file between
-two hosts.
+This sample provides interactive mode to do packet based processing
+between two systems.
+
+This sample supports 4 types of packet forwarding mode.
+
+* ``file-trans``: transmit files between two systems. The sample will
+  be polling to receive files from the peer and save the file as
+  ``ntb_recv_file[N]``, [N] represents the number of received file.
+* ``rxonly``: NTB receives packets but doesn't transmit them.
+* ``txonly``: NTB generates and transmits packets without receiving any.
+* ``iofwd``: iofwd between NTB device and ethdev.
 
 Compiling the Application
 -------------------------
@@ -29,6 +38,40 @@ Refer to the *DPDK Getting Started Guide* for general information on
 running applications and the Environment Abstraction Layer (EAL)
 options.
 
+Command-line Options
+--------------------
+
+The application supports the following command-line options.
+
+* ``--buf-size=N``
+
+  Set the data size of the mbufs used to N bytes, where N < 65536.
+  The default value is 2048.
+
+* ``--fwd-mode=mode``
+
+  Set the packet forwarding mode as ``file-trans``, ``txonly``,
+  ``rxonly`` or ``iofwd``.
+
+* ``--nb-desc=N``
+
+  Set number of descriptors of queue as N, namely queue size,
+  where 64 <= N <= 1024. The default value is 1024.
+
+* ``--txfreet=N``
+
+  Set the transmit free threshold of TX rings to N, where 0 <= N <=
+  the value of ``--nb-desc``. The default value is 256.
+
+* ``--burst=N``
+
+  Set the number of packets per burst to N, where 1 <= N <= 32.
+  The default value is 32.
+
+* ``--qp=N``
+
+  Set the number of queues as N, where qp > 0.
+
 Using the application
 ---------------------
 
@@ -41,7 +84,11 @@ The application is console-driven using the cmdline DPDK interface:
 From this interface the available commands and descriptions of what
 they do as as follows:
 
-* ``send [filepath]``: Send file to the peer host.
-* ``receive [filepath]``: Receive file to [filepath]. Need the peer
-  to send file successfully first.
-* ``quit``: Exit program
+* ``send [filepath]``: Send file to the peer host. Need to be in
+  file-trans forwarding mode first.
+* ``start``: Start transmission.
+* ``stop``: Stop transmission.
+* ``show/clear port stats``: Show/Clear port stats and throughput.
+* ``set fwd file-trans/rxonly/txonly/iofwd``: Set packet forwarding
+  mode.
+* ``quit``: Exit program.
diff --git a/examples/ntb/meson.build b/examples/ntb/meson.build
index 9a6288f4f..f5435fe12 100644
--- a/examples/ntb/meson.build
+++ b/examples/ntb/meson.build
@@ -14,3 +14,6 @@ cflags += ['-D_FILE_OFFSET_BITS=64']
 sources = files(
 	'ntb_fwd.c'
 )
+if dpdk_conf.has('RTE_LIBRTE_PMD_NTB_RAWDEV')
+	deps += 'rawdev_ntb'
+endif
diff --git a/examples/ntb/ntb_fwd.c b/examples/ntb/ntb_fwd.c
index f8c970cdb..60b5b3b99 100644
--- a/examples/ntb/ntb_fwd.c
+++ b/examples/ntb/ntb_fwd.c
@@ -14,21 +14,102 @@
 #include <cmdline.h>
 #include <rte_common.h>
 #include <rte_rawdev.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
 #include <rte_lcore.h>
+#include <rte_pmd_ntb.h>
 
-#define NTB_DRV_NAME_LEN	7
-static uint64_t max_file_size = 0x400000;
+/* Per-port statistics struct */
+struct ntb_port_statistics {
+	uint64_t tx;
+	uint64_t rx;
+} __rte_cache_aligned;
+/* Port 0: NTB dev, Port 1: ethdev when iofwd. */
+struct ntb_port_statistics ntb_port_stats[2];
+
+struct ntb_fwd_stream {
+	uint16_t tx_port;
+	uint16_t rx_port;
+	uint16_t qp_id;
+	uint8_t tx_ntb;  /* If ntb device is tx port. */
+};
+
+struct ntb_fwd_lcore_conf {
+	uint16_t stream_id;
+	uint16_t nb_stream;
+	uint8_t stopped;
+};
+
+enum ntb_fwd_mode {
+	FILE_TRANS = 0,
+	RXONLY,
+	TXONLY,
+	IOFWD,
+	MAX_FWD_MODE,
+};
+static const char *const fwd_mode_s[] = {
+	"file-trans",
+	"rxonly",
+	"txonly",
+	"iofwd",
+	NULL,
+};
+static enum ntb_fwd_mode fwd_mode = MAX_FWD_MODE;
+
+static struct ntb_fwd_lcore_conf fwd_lcore_conf[RTE_MAX_LCORE];
+static struct ntb_fwd_stream *fwd_streams;
+
+static struct rte_mempool *mbuf_pool;
+
+#define NTB_DRV_NAME_LEN 7
+#define MEMPOOL_CACHE_SIZE 256
+
+static uint8_t in_test;
 static uint8_t interactive = 1;
+static uint16_t eth_port_id = RTE_MAX_ETHPORTS;
 static uint16_t dev_id;
 
+/* Number of queues, default set as 1 */
+static uint16_t num_queues = 1;
+static uint16_t ntb_buf_size = RTE_MBUF_DEFAULT_BUF_SIZE;
+
+/* Configurable number of descriptors */
+#define NTB_DEFAULT_NUM_DESCS 1024
+static uint16_t nb_desc = NTB_DEFAULT_NUM_DESCS;
+
+static uint16_t tx_free_thresh;
+
+#define NTB_MAX_PKT_BURST 32
+#define NTB_DFLT_PKT_BURST 32
+static uint16_t pkt_burst = NTB_DFLT_PKT_BURST;
+
+#define BURST_TX_RETRIES 64
+
+static struct rte_eth_conf eth_port_conf = {
+	.rxmode = {
+		.mq_mode = ETH_MQ_RX_RSS,
+		.split_hdr_size = 0,
+	},
+	.rx_adv_conf = {
+		.rss_conf = {
+			.rss_key = NULL,
+			.rss_hf = ETH_RSS_IP,
+		},
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
 /* *** Help command with introduction. *** */
 struct cmd_help_result {
 	cmdline_fixed_string_t help;
 };
 
-static void cmd_help_parsed(__attribute__((unused)) void *parsed_result,
-			    struct cmdline *cl,
-			    __attribute__((unused)) void *data)
+static void
+cmd_help_parsed(__attribute__((unused)) void *parsed_result,
+		struct cmdline *cl,
+		__attribute__((unused)) void *data)
 {
 	cmdline_printf(
 		cl,
@@ -37,13 +118,17 @@ static void cmd_help_parsed(__attribute__((unused)) void *parsed_result,
 		"Control:\n"
 		"    quit                                      :"
 		" Quit the application.\n"
-		"\nFile transmit:\n"
+		"\nTransmission:\n"
 		"    send [path]                               :"
-		" Send [path] file. (No more than %"PRIu64")\n"
-		"    recv [path]                            :"
-		" Receive file to [path]. Make sure sending is done"
-		" on the other side.\n",
-		max_file_size
+		" Send [path] file. Only take effect in file-trans mode\n"
+		"    start                                     :"
+		" Start transmissions.\n"
+		"    stop                                      :"
+		" Stop transmissions.\n"
+		"    clear/show port stats                     :"
+		" Clear/show port stats.\n"
+		"    set fwd file-trans/rxonly/txonly/iofwd    :"
+		" Set packet forwarding mode.\n"
 	);
 
 }
@@ -66,13 +151,37 @@ struct cmd_quit_result {
 	cmdline_fixed_string_t quit;
 };
 
-static void cmd_quit_parsed(__attribute__((unused)) void *parsed_result,
-			    struct cmdline *cl,
-			    __attribute__((unused)) void *data)
+static void
+cmd_quit_parsed(__attribute__((unused)) void *parsed_result,
+		struct cmdline *cl,
+		__attribute__((unused)) void *data)
 {
+	struct ntb_fwd_lcore_conf *conf;
+	uint8_t lcore_id;
+
+	/* Stop transmission first. */
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		conf = &fwd_lcore_conf[lcore_id];
+
+		if (!conf->nb_stream)
+			continue;
+
+		if (conf->stopped)
+			continue;
+
+		conf->stopped = 1;
+	}
+	printf("\nWaiting for lcores to finish...\n");
+	rte_eal_mp_wait_lcore();
+	in_test = 0;
+
 	/* Stop traffic and Close port. */
 	rte_rawdev_stop(dev_id);
 	rte_rawdev_close(dev_id);
+	if (eth_port_id < RTE_MAX_ETHPORTS && fwd_mode == IOFWD) {
+		rte_eth_dev_stop(eth_port_id);
+		rte_eth_dev_close(eth_port_id);
+	}
 
 	cmdline_quit(cl);
 }
@@ -102,21 +211,19 @@ cmd_sendfile_parsed(void *parsed_result,
 		    __attribute__((unused)) void *data)
 {
 	struct cmd_sendfile_result *res = parsed_result;
-	struct rte_rawdev_buf *pkts_send[1];
-	uint64_t rsize, size, link;
-	uint8_t *buff;
+	struct rte_rawdev_buf *pkts_send[NTB_MAX_PKT_BURST];
+	struct rte_mbuf *mbuf_send[NTB_MAX_PKT_BURST];
+	uint64_t size, count, i, nb_burst;
+	uint16_t nb_tx, buf_size;
+	unsigned int nb_pkt;
+	size_t queue_id = 0;
+	uint16_t retry = 0;
 	uint32_t val;
 	FILE *file;
 
-	if (!rte_rawdevs[dev_id].started) {
-		printf("Device needs to be up first. Try later.\n");
-		return;
-	}
-
-	rte_rawdev_get_attr(dev_id, "link_status", &link);
-	if (!link) {
-		printf("Link is not up, cannot send file.\n");
-		return;
+	if (num_queues != 1) {
+		printf("File transmission only supports 1 queue.\n");
+		num_queues = 1;
 	}
 
 	file = fopen(res->filepath, "r");
@@ -127,30 +234,13 @@ cmd_sendfile_parsed(void *parsed_result,
 
 	if (fseek(file, 0, SEEK_END) < 0) {
 		printf("Fail to get file size.\n");
+		fclose(file);
 		return;
 	}
 	size = ftell(file);
 	if (fseek(file, 0, SEEK_SET) < 0) {
 		printf("Fail to get file size.\n");
-		return;
-	}
-
-	/**
-	 * No FIFO now. Only test memory. Limit sending file
-	 * size <= max_file_size.
-	 */
-	if (size > max_file_size) {
-		printf("Warning: The file is too large. Only send first"
-		       " %"PRIu64" bits.\n", max_file_size);
-		size = max_file_size;
-	}
-
-	buff = (uint8_t *)malloc(size);
-	rsize = fread(buff, size, 1, file);
-	if (rsize != 1) {
-		printf("Fail to read file.\n");
 		fclose(file);
-		free(buff);
 		return;
 	}
 
@@ -159,22 +249,63 @@ cmd_sendfile_parsed(void *parsed_result,
 	rte_rawdev_set_attr(dev_id, "spad_user_0", val);
 	val = size;
 	rte_rawdev_set_attr(dev_id, "spad_user_1", val);
+	printf("Sending file, size is %"PRIu64"\n", size);
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		pkts_send[i] = (struct rte_rawdev_buf *)
+				malloc(sizeof(struct rte_rawdev_buf));
+
+	buf_size = ntb_buf_size - RTE_PKTMBUF_HEADROOM;
+	count = (size + buf_size - 1) / buf_size;
+	nb_burst = (count + pkt_burst - 1) / pkt_burst;
 
-	pkts_send[0] = (struct rte_rawdev_buf *)malloc
-			(sizeof(struct rte_rawdev_buf));
-	pkts_send[0]->buf_addr = buff;
+	for (i = 0; i < nb_burst; i++) {
+		val = RTE_MIN(count, pkt_burst);
+		if (rte_mempool_get_bulk(mbuf_pool, (void **)mbuf_send,
+					val) == 0) {
+			for (nb_pkt = 0; nb_pkt < val; nb_pkt++) {
+				mbuf_send[nb_pkt]->port = dev_id;
+				mbuf_send[nb_pkt]->data_len =
+				fread(rte_pktmbuf_mtod(mbuf_send[nb_pkt],
+					void *), 1, buf_size, file);
+				mbuf_send[nb_pkt]->pkt_len =
+					mbuf_send[nb_pkt]->data_len;
+				pkts_send[nb_pkt]->buf_addr = mbuf_send[nb_pkt];
+			}
+		} else {
+			for (nb_pkt = 0; nb_pkt < val; nb_pkt++) {
+				mbuf_send[nb_pkt] =
+					rte_mbuf_raw_alloc(mbuf_pool);
+				if (mbuf_send[nb_pkt] == NULL)
+					break;
+				mbuf_send[nb_pkt]->port = dev_id;
+				mbuf_send[nb_pkt]->data_len =
+				fread(rte_pktmbuf_mtod(mbuf_send[nb_pkt],
+					void *), 1, buf_size, file);
+				mbuf_send[nb_pkt]->pkt_len =
+					mbuf_send[nb_pkt]->data_len;
+				pkts_send[nb_pkt]->buf_addr = mbuf_send[nb_pkt];
+			}
+		}
 
-	if (rte_rawdev_enqueue_buffers(dev_id, pkts_send, 1,
-				       (void *)(size_t)size)) {
-		printf("Fail to enqueue.\n");
-		goto clean;
+		nb_tx = rte_rawdev_enqueue_buffers(dev_id, pkts_send, nb_pkt,
+						   (void *)queue_id);
+		while (nb_tx != nb_pkt && retry < BURST_TX_RETRIES) {
+			rte_delay_us(1);
+			nb_tx += rte_rawdev_enqueue_buffers(dev_id,
+				&pkts_send[nb_tx], nb_pkt - nb_tx,
+				(void *)queue_id);
+		}
+		count -= nb_pkt;
 	}
+	/* Clear register after file sending done. */
+	rte_rawdev_set_attr(dev_id, "spad_user_0", 0);
+	rte_rawdev_set_attr(dev_id, "spad_user_1", 0);
 	printf("Done sending file.\n");
 
-clean:
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		free(pkts_send[i]);
 	fclose(file);
-	free(buff);
-	free(pkts_send[0]);
 }
 
 cmdline_parse_token_string_t cmd_send_file_send =
@@ -195,79 +326,680 @@ cmdline_parse_inst_t cmd_send_file = {
 	},
 };
 
-/* *** RECEIVE FILE PARAMETERS *** */
-struct cmd_recvfile_result {
-	cmdline_fixed_string_t recv_string;
-	char filepath[];
-};
+#define RECV_FILE_LEN 30
+static int
+start_polling_recv_file(void *param)
+{
+	struct rte_rawdev_buf *pkts_recv[NTB_MAX_PKT_BURST];
+	struct ntb_fwd_lcore_conf *conf = param;
+	struct rte_mbuf *mbuf;
+	char filepath[RECV_FILE_LEN];
+	uint64_t val, size, file_len;
+	uint16_t nb_rx, i, file_no;
+	size_t queue_id = 0;
+	FILE *file;
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		pkts_recv[i] = (struct rte_rawdev_buf *)
+				malloc(sizeof(struct rte_rawdev_buf));
+
+	file_no = 0;
+	while (!conf->stopped) {
+		snprintf(filepath, RECV_FILE_LEN, "ntb_recv_file%d", file_no);
+		file = fopen(filepath, "w");
+		if (file == NULL) {
+			printf("Fail to open the file.\n");
+			return -EINVAL;
+		}
+
+		rte_rawdev_get_attr(dev_id, "spad_user_0", &val);
+		size = val << 32;
+		rte_rawdev_get_attr(dev_id, "spad_user_1", &val);
+		size |= val;
+
+		if (!size) {
+			fclose(file);
+			continue;
+		}
+
+		file_len = 0;
+		nb_rx = NTB_MAX_PKT_BURST;
+		while (file_len < size && !conf->stopped) {
+			nb_rx = rte_rawdev_dequeue_buffers(dev_id, pkts_recv,
+						pkt_burst, (void *)queue_id);
+			ntb_port_stats[0].rx += nb_rx;
+			for (i = 0; i < nb_rx; i++) {
+				mbuf = pkts_recv[i]->buf_addr;
+				fwrite(rte_pktmbuf_mtod(mbuf, void *), 1,
+					mbuf->data_len, file);
+				file_len += mbuf->data_len;
+				rte_pktmbuf_free(mbuf);
+				pkts_recv[i]->buf_addr = NULL;
+			}
+		}
+
+		printf("Received file (size: %" PRIu64 ") from peer to %s.\n",
+			size, filepath);
+		fclose(file);
+		file_no++;
+	}
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		free(pkts_recv[i]);
+	return 0;
+}
+
+static int
+start_iofwd_per_lcore(void *param)
+{
+	struct rte_rawdev_buf *ntb_buf[NTB_MAX_PKT_BURST];
+	struct rte_mbuf *pkts_burst[NTB_MAX_PKT_BURST];
+	struct ntb_fwd_lcore_conf *conf = param;
+	struct ntb_fwd_stream fs;
+	uint16_t nb_rx, nb_tx;
+	int i, j;
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		ntb_buf[i] = (struct rte_rawdev_buf *)
+			     malloc(sizeof(struct rte_rawdev_buf));
+
+	while (!conf->stopped) {
+		for (i = 0; i < conf->nb_stream; i++) {
+			fs = fwd_streams[conf->stream_id + i];
+			if (fs.tx_ntb) {
+				nb_rx = rte_eth_rx_burst(fs.rx_port,
+						fs.qp_id, pkts_burst,
+						pkt_burst);
+				if (unlikely(nb_rx == 0))
+					continue;
+				for (j = 0; j < nb_rx; j++)
+					ntb_buf[j]->buf_addr = pkts_burst[j];
+				nb_tx =
+				rte_rawdev_enqueue_buffers(fs.tx_port,
+						ntb_buf, nb_rx,
+						(void *)(size_t)fs.qp_id);
+				ntb_port_stats[0].tx += nb_tx;
+				ntb_port_stats[1].rx += nb_rx;
+			} else {
+				nb_rx =
+				rte_rawdev_dequeue_buffers(fs.rx_port,
+						ntb_buf, pkt_burst,
+						(void *)(size_t)fs.qp_id);
+				if (unlikely(nb_rx == 0))
+					continue;
+				for (j = 0; j < nb_rx; j++)
+					pkts_burst[j] = ntb_buf[j]->buf_addr;
+				nb_tx = rte_eth_tx_burst(fs.tx_port,
+					fs.qp_id, pkts_burst, nb_rx);
+				ntb_port_stats[1].tx += nb_tx;
+				ntb_port_stats[0].rx += nb_rx;
+			}
+			if (unlikely(nb_tx < nb_rx)) {
+				do {
+					rte_pktmbuf_free(pkts_burst[nb_tx]);
+				} while (++nb_tx < nb_rx);
+			}
+		}
+	}
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		free(ntb_buf[i]);
+
+	return 0;
+}
+
+static int
+start_rxonly_per_lcore(void *param)
+{
+	struct rte_rawdev_buf *ntb_buf[NTB_MAX_PKT_BURST];
+	struct ntb_fwd_lcore_conf *conf = param;
+	struct ntb_fwd_stream fs;
+	uint16_t nb_rx;
+	int i, j;
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		ntb_buf[i] = (struct rte_rawdev_buf *)
+			     malloc(sizeof(struct rte_rawdev_buf));
+
+	while (!conf->stopped) {
+		for (i = 0; i < conf->nb_stream; i++) {
+			fs = fwd_streams[conf->stream_id + i];
+			nb_rx = rte_rawdev_dequeue_buffers(fs.rx_port,
+				ntb_buf, pkt_burst, (void *)(size_t)fs.qp_id);
+			if (unlikely(nb_rx == 0))
+				continue;
+			ntb_port_stats[0].rx += nb_rx;
+
+			for (j = 0; j < nb_rx; j++)
+				rte_pktmbuf_free(ntb_buf[j]->buf_addr);
+		}
+	}
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		free(ntb_buf[i]);
+
+	return 0;
+}
+
+
+static int
+start_txonly_per_lcore(void *param)
+{
+	struct rte_rawdev_buf *ntb_buf[NTB_MAX_PKT_BURST];
+	struct rte_mbuf *pkts_burst[NTB_MAX_PKT_BURST];
+	struct ntb_fwd_lcore_conf *conf = param;
+	struct ntb_fwd_stream fs;
+	uint16_t nb_pkt, nb_tx;
+	int i;
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		ntb_buf[i] = (struct rte_rawdev_buf *)
+			     malloc(sizeof(struct rte_rawdev_buf));
+
+	while (!conf->stopped) {
+		for (i = 0; i < conf->nb_stream; i++) {
+			fs = fwd_streams[conf->stream_id + i];
+			if (rte_mempool_get_bulk(mbuf_pool, (void **)pkts_burst,
+				  pkt_burst) == 0) {
+				for (nb_pkt = 0; nb_pkt < pkt_burst; nb_pkt++) {
+					pkts_burst[nb_pkt]->port = dev_id;
+					pkts_burst[nb_pkt]->data_len =
+						pkts_burst[nb_pkt]->buf_len -
+						RTE_PKTMBUF_HEADROOM;
+					pkts_burst[nb_pkt]->pkt_len =
+						pkts_burst[nb_pkt]->data_len;
+					ntb_buf[nb_pkt]->buf_addr =
+						pkts_burst[nb_pkt];
+				}
+			} else {
+				for (nb_pkt = 0; nb_pkt < pkt_burst; nb_pkt++) {
+					pkts_burst[nb_pkt] =
+						rte_pktmbuf_alloc(mbuf_pool);
+					if (pkts_burst[nb_pkt] == NULL)
+						break;
+					pkts_burst[nb_pkt]->port = dev_id;
+					pkts_burst[nb_pkt]->data_len =
+						pkts_burst[nb_pkt]->buf_len -
+						RTE_PKTMBUF_HEADROOM;
+					pkts_burst[nb_pkt]->pkt_len =
+						pkts_burst[nb_pkt]->data_len;
+					ntb_buf[nb_pkt]->buf_addr =
+						pkts_burst[nb_pkt];
+				}
+			}
+			nb_tx = rte_rawdev_enqueue_buffers(fs.tx_port,
+				ntb_buf, nb_pkt, (void *)(size_t)fs.qp_id);
+			ntb_port_stats[0].tx += nb_tx;
+			if (unlikely(nb_tx < nb_pkt)) {
+				do {
+					rte_pktmbuf_free(
+						ntb_buf[nb_tx]->buf_addr);
+				} while (++nb_tx < nb_pkt);
+			}
+		}
+	}
+
+	for (i = 0; i < NTB_MAX_PKT_BURST; i++)
+		free(ntb_buf[i]);
+
+	return 0;
+}
+
+static int
+ntb_fwd_config_setup(void)
+{
+	uint16_t i;
+
+	/* Make sure iofwd has valid ethdev. */
+	if (fwd_mode == IOFWD && eth_port_id >= RTE_MAX_ETHPORTS) {
+		printf("No ethdev, cannot be in iofwd mode.");
+		return -EINVAL;
+	}
+
+	if (fwd_mode == IOFWD) {
+		fwd_streams = rte_zmalloc("ntb_fwd: fwd_streams",
+			sizeof(struct ntb_fwd_stream) * num_queues * 2,
+			RTE_CACHE_LINE_SIZE);
+		for (i = 0; i < num_queues; i++) {
+			fwd_streams[i * 2].qp_id = i;
+			fwd_streams[i * 2].tx_port = dev_id;
+			fwd_streams[i * 2].rx_port = eth_port_id;
+			fwd_streams[i * 2].tx_ntb = 1;
+
+			fwd_streams[i * 2 + 1].qp_id = i;
+			fwd_streams[i * 2 + 1].tx_port = eth_port_id;
+			fwd_streams[i * 2 + 1].rx_port = dev_id;
+			fwd_streams[i * 2 + 1].tx_ntb = 0;
+		}
+		return 0;
+	}
+
+	if (fwd_mode == RXONLY || fwd_mode == FILE_TRANS) {
+		/* Only support 1 queue in file-trans for in order. */
+		if (fwd_mode == FILE_TRANS)
+			num_queues = 1;
+
+		fwd_streams = rte_zmalloc("ntb_fwd: fwd_streams",
+				sizeof(struct ntb_fwd_stream) * num_queues,
+				RTE_CACHE_LINE_SIZE);
+		for (i = 0; i < num_queues; i++) {
+			fwd_streams[i].qp_id = i;
+			fwd_streams[i].tx_port = RTE_MAX_ETHPORTS;
+			fwd_streams[i].rx_port = dev_id;
+			fwd_streams[i].tx_ntb = 0;
+		}
+		return 0;
+	}
+
+	if (fwd_mode == TXONLY) {
+		fwd_streams = rte_zmalloc("ntb_fwd: fwd_streams",
+				sizeof(struct ntb_fwd_stream) * num_queues,
+				RTE_CACHE_LINE_SIZE);
+		for (i = 0; i < num_queues; i++) {
+			fwd_streams[i].qp_id = i;
+			fwd_streams[i].tx_port = dev_id;
+			fwd_streams[i].rx_port = RTE_MAX_ETHPORTS;
+			fwd_streams[i].tx_ntb = 1;
+		}
+	}
+	return 0;
+}
 
 static void
-cmd_recvfile_parsed(void *parsed_result,
-		    __attribute__((unused)) struct cmdline *cl,
-		    __attribute__((unused)) void *data)
+assign_stream_to_lcores(void)
 {
-	struct cmd_sendfile_result *res = parsed_result;
-	struct rte_rawdev_buf *pkts_recv[1];
-	uint8_t *buff;
-	uint64_t val;
-	size_t size;
-	FILE *file;
+	struct ntb_fwd_lcore_conf *conf;
+	struct ntb_fwd_stream *fs;
+	uint16_t nb_streams, sm_per_lcore, sm_id, i;
+	uint8_t lcore_id, lcore_num, nb_extra;
 
-	if (!rte_rawdevs[dev_id].started) {
-		printf("Device needs to be up first. Try later.\n");
-		return;
+	lcore_num = rte_lcore_count();
+	/* Exclude master core */
+	lcore_num--;
+
+	nb_streams = (fwd_mode == IOFWD) ? num_queues * 2 : num_queues;
+
+	sm_per_lcore = nb_streams / lcore_num;
+	nb_extra = nb_streams % lcore_num;
+	sm_id = 0;
+	i = 0;
+
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		conf = &fwd_lcore_conf[lcore_id];
+
+		if (i < nb_extra) {
+			conf->nb_stream = sm_per_lcore + 1;
+			conf->stream_id = sm_id;
+			sm_id = sm_id + sm_per_lcore + 1;
+		} else {
+			conf->nb_stream = sm_per_lcore;
+			conf->stream_id = sm_id;
+			sm_id = sm_id + sm_per_lcore;
+		}
+
+		i++;
+		if (sm_id >= nb_streams)
+			break;
+	}
+
+	/* Print packet forwading config. */
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		conf = &fwd_lcore_conf[lcore_id];
+
+		if (!conf->nb_stream)
+			continue;
+
+		printf("Streams on Lcore %u :\n", lcore_id);
+		for (i = 0; i < conf->nb_stream; i++) {
+			fs = &fwd_streams[conf->stream_id + i];
+			if (fwd_mode == IOFWD)
+				printf(" + Stream %u : %s%u RX -> %s%u TX,"
+					" Q=%u\n", conf->stream_id + i,
+					fs->tx_ntb ? "Eth" : "NTB", fs->rx_port,
+					fs->tx_ntb ? "NTB" : "Eth", fs->tx_port,
+					fs->qp_id);
+			if (fwd_mode == FILE_TRANS || fwd_mode == RXONLY)
+				printf(" + Stream %u : %s%u RX only\n",
+					conf->stream_id, "NTB", fs->rx_port);
+			if (fwd_mode == TXONLY)
+				printf(" + Stream %u : %s%u TX only\n",
+					conf->stream_id, "NTB", fs->tx_port);
+		}
 	}
+}
 
-	rte_rawdev_get_attr(dev_id, "link_status", &val);
-	if (!val) {
-		printf("Link is not up, cannot receive file.\n");
+static void
+start_pkt_fwd(void)
+{
+	struct ntb_fwd_lcore_conf *conf;
+	struct rte_eth_link eth_link;
+	uint8_t lcore_id;
+	int ret, i;
+
+	ret = ntb_fwd_config_setup();
+	if (ret < 0) {
+		printf("Cannot start traffic. Please reset fwd mode.\n");
 		return;
 	}
 
-	file = fopen(res->filepath, "w");
-	if (file == NULL) {
-		printf("Fail to open the file.\n");
+	/* If using iofwd, checking ethdev link status first. */
+	if (fwd_mode == IOFWD) {
+		printf("Checking eth link status...\n");
+		/* Wait for eth link up at most 100 times. */
+		for (i = 0; i < 100; i++) {
+			rte_eth_link_get(eth_port_id, &eth_link);
+			if (eth_link.link_status) {
+				printf("Eth%u Link Up. Speed %u Mbps - %s\n",
+					eth_port_id, eth_link.link_speed,
+					(eth_link.link_duplex ==
+					 ETH_LINK_FULL_DUPLEX) ?
+					("full-duplex") : ("half-duplex"));
+				break;
+			}
+		}
+		if (!eth_link.link_status) {
+			printf("Eth%u link down. Cannot start traffic.\n",
+				eth_port_id);
+			return;
+		}
+	}
+
+	assign_stream_to_lcores();
+	in_test = 1;
+
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		conf = &fwd_lcore_conf[lcore_id];
+
+		if (!conf->nb_stream)
+			continue;
+
+		conf->stopped = 0;
+		if (fwd_mode == FILE_TRANS)
+			rte_eal_remote_launch(start_polling_recv_file,
+					      conf, lcore_id);
+		else if (fwd_mode == IOFWD)
+			rte_eal_remote_launch(start_iofwd_per_lcore,
+					      conf, lcore_id);
+		else if (fwd_mode == RXONLY)
+			rte_eal_remote_launch(start_rxonly_per_lcore,
+					      conf, lcore_id);
+		else if (fwd_mode == TXONLY)
+			rte_eal_remote_launch(start_txonly_per_lcore,
+					      conf, lcore_id);
+	}
+}
+
+/* *** START FWD PARAMETERS *** */
+struct cmd_start_result {
+	cmdline_fixed_string_t start;
+};
+
+static void
+cmd_start_parsed(__attribute__((unused)) void *parsed_result,
+			    __attribute__((unused)) struct cmdline *cl,
+			    __attribute__((unused)) void *data)
+{
+	start_pkt_fwd();
+}
+
+cmdline_parse_token_string_t cmd_start_start =
+		TOKEN_STRING_INITIALIZER(struct cmd_start_result, start, "start");
+
+cmdline_parse_inst_t cmd_start = {
+	.f = cmd_start_parsed,
+	.data = NULL,
+	.help_str = "start pkt fwd between ntb and ethdev",
+	.tokens = {
+		(void *)&cmd_start_start,
+		NULL,
+	},
+};
+
+/* *** STOP *** */
+struct cmd_stop_result {
+	cmdline_fixed_string_t stop;
+};
+
+static void
+cmd_stop_parsed(__attribute__((unused)) void *parsed_result,
+		__attribute__((unused)) struct cmdline *cl,
+		__attribute__((unused)) void *data)
+{
+	struct ntb_fwd_lcore_conf *conf;
+	uint8_t lcore_id;
+
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		conf = &fwd_lcore_conf[lcore_id];
+
+		if (!conf->nb_stream)
+			continue;
+
+		if (conf->stopped)
+			continue;
+
+		conf->stopped = 1;
+	}
+	printf("\nWaiting for lcores to finish...\n");
+	rte_eal_mp_wait_lcore();
+	in_test = 0;
+	printf("\nDone.\n");
+}
+
+cmdline_parse_token_string_t cmd_stop_stop =
+		TOKEN_STRING_INITIALIZER(struct cmd_stop_result, stop, "stop");
+
+cmdline_parse_inst_t cmd_stop = {
+	.f = cmd_stop_parsed,
+	.data = NULL,
+	.help_str = "stop: Stop packet forwarding",
+	.tokens = {
+		(void *)&cmd_stop_stop,
+		NULL,
+	},
+};
+
+static void
+ntb_stats_clear(void)
+{
+	int nb_ids, i;
+	uint32_t *ids;
+
+	/* Clear NTB dev stats */
+	nb_ids = rte_rawdev_xstats_names_get(dev_id, NULL, 0);
+	if (nb_ids  < 0) {
+		printf("Error: Cannot get count of xstats\n");
 		return;
 	}
+	ids = malloc(sizeof(uint32_t) * nb_ids);
+	for (i = 0; i < nb_ids; i++)
+		ids[i] = i;
+	rte_rawdev_xstats_reset(dev_id, ids, nb_ids);
+	printf("\n  statistics for NTB port %d cleared\n", dev_id);
+
+	/* Clear Ethdev stats if have any */
+	if (fwd_mode == IOFWD && eth_port_id != RTE_MAX_ETHPORTS) {
+		rte_eth_stats_reset(eth_port_id);
+		printf("\n  statistics for ETH port %d cleared\n", eth_port_id);
+	}
+}
+
+static inline void
+ntb_calculate_throughput(uint16_t port) {
+	uint64_t diff_pkts_rx, diff_pkts_tx, diff_cycles;
+	uint64_t mpps_rx, mpps_tx;
+	static uint64_t prev_pkts_rx[2];
+	static uint64_t prev_pkts_tx[2];
+	static uint64_t prev_cycles[2];
+
+	diff_cycles = prev_cycles[port];
+	prev_cycles[port] = rte_rdtsc();
+	if (diff_cycles > 0)
+		diff_cycles = prev_cycles[port] - diff_cycles;
+	diff_pkts_rx = (ntb_port_stats[port].rx > prev_pkts_rx[port]) ?
+		(ntb_port_stats[port].rx - prev_pkts_rx[port]) : 0;
+	diff_pkts_tx = (ntb_port_stats[port].tx > prev_pkts_tx[port]) ?
+		(ntb_port_stats[port].tx - prev_pkts_tx[port]) : 0;
+	prev_pkts_rx[port] = ntb_port_stats[port].rx;
+	prev_pkts_tx[port] = ntb_port_stats[port].tx;
+	mpps_rx = diff_cycles > 0 ?
+		diff_pkts_rx * rte_get_tsc_hz() / diff_cycles : 0;
+	mpps_tx = diff_cycles > 0 ?
+		diff_pkts_tx * rte_get_tsc_hz() / diff_cycles : 0;
+	printf("  Throughput (since last show)\n");
+	printf("  Rx-pps: %12"PRIu64"\n  Tx-pps: %12"PRIu64"\n",
+			mpps_rx, mpps_tx);
+
+}
+
+static void
+ntb_stats_display(void)
+{
+	struct rte_rawdev_xstats_name *xstats_names;
+	struct rte_eth_stats stats;
+	uint64_t *values;
+	uint32_t *ids;
+	int nb_ids, i;
 
-	rte_rawdev_get_attr(dev_id, "spad_user_0", &val);
-	size = val << 32;
-	rte_rawdev_get_attr(dev_id, "spad_user_1", &val);
-	size |= val;
+	printf("###### statistics for NTB port %d #######\n", dev_id);
 
-	buff = (uint8_t *)malloc(size);
-	pkts_recv[0] = (struct rte_rawdev_buf *)malloc
-			(sizeof(struct rte_rawdev_buf));
-	pkts_recv[0]->buf_addr = buff;
+	/* Get NTB dev stats and stats names */
+	nb_ids = rte_rawdev_xstats_names_get(dev_id, NULL, 0);
+	if (nb_ids  < 0) {
+		printf("Error: Cannot get count of xstats\n");
+		return;
+	}
+	xstats_names = malloc(sizeof(struct rte_rawdev_xstats_name) * nb_ids);
+	if (xstats_names == NULL) {
+		printf("Cannot allocate memory for xstats lookup\n");
+		return;
+	}
+	if (nb_ids != rte_rawdev_xstats_names_get(
+			dev_id, xstats_names, nb_ids)) {
+		printf("Error: Cannot get xstats lookup\n");
+		free(xstats_names);
+		return;
+	}
+	ids = malloc(sizeof(uint32_t) * nb_ids);
+	for (i = 0; i < nb_ids; i++)
+		ids[i] = i;
+	values = malloc(sizeof(uint64_t) * nb_ids);
+	if (nb_ids != rte_rawdev_xstats_get(dev_id, ids, values, nb_ids)) {
+		printf("Error: Unable to get xstats\n");
+		free(xstats_names);
+		free(values);
+		free(ids);
+		return;
+	}
+
+	/* Display NTB dev stats */
+	for (i = 0; i < nb_ids; i++)
+		printf("  %s: %"PRIu64"\n", xstats_names[i].name, values[i]);
+	ntb_calculate_throughput(0);
 
-	if (rte_rawdev_dequeue_buffers(dev_id, pkts_recv, 1, (void *)size)) {
-		printf("Fail to dequeue.\n");
-		goto clean;
+	/* Get Ethdev stats if have any */
+	if (fwd_mode == IOFWD && eth_port_id != RTE_MAX_ETHPORTS) {
+		printf("###### statistics for ETH port %d ######\n",
+			eth_port_id);
+		rte_eth_stats_get(eth_port_id, &stats);
+		printf("  RX-packets: %"PRIu64"\n", stats.ipackets);
+		printf("  RX-bytes: %"PRIu64"\n", stats.ibytes);
+		printf("  RX-errors: %"PRIu64"\n", stats.ierrors);
+		printf("  RX-missed: %"PRIu64"\n", stats.imissed);
+		printf("  TX-packets: %"PRIu64"\n", stats.opackets);
+		printf("  TX-bytes: %"PRIu64"\n", stats.obytes);
+		printf("  TX-errors: %"PRIu64"\n", stats.oerrors);
+		ntb_calculate_throughput(1);
 	}
 
-	fwrite(buff, size, 1, file);
-	printf("Done receiving to file.\n");
+	free(xstats_names);
+	free(values);
+	free(ids);
+}
 
-clean:
-	fclose(file);
-	free(buff);
-	free(pkts_recv[0]);
+/* *** SHOW/CLEAR PORT STATS *** */
+struct cmd_stats_result {
+	cmdline_fixed_string_t show;
+	cmdline_fixed_string_t port;
+	cmdline_fixed_string_t stats;
+};
+
+static void
+cmd_stats_parsed(void *parsed_result,
+		 __attribute__((unused)) struct cmdline *cl,
+		 __attribute__((unused)) void *data)
+{
+	struct cmd_stats_result *res = parsed_result;
+	if (!strcmp(res->show, "clear"))
+		ntb_stats_clear();
+	else
+		ntb_stats_display();
 }
 
-cmdline_parse_token_string_t cmd_recv_file_recv =
-	TOKEN_STRING_INITIALIZER(struct cmd_recvfile_result, recv_string,
-				 "recv");
-cmdline_parse_token_string_t cmd_recv_file_filepath =
-	TOKEN_STRING_INITIALIZER(struct cmd_recvfile_result, filepath, NULL);
+cmdline_parse_token_string_t cmd_stats_show =
+	TOKEN_STRING_INITIALIZER(struct cmd_stats_result, show, "show#clear");
+cmdline_parse_token_string_t cmd_stats_port =
+	TOKEN_STRING_INITIALIZER(struct cmd_stats_result, port, "port");
+cmdline_parse_token_string_t cmd_stats_stats =
+	TOKEN_STRING_INITIALIZER(struct cmd_stats_result, stats, "stats");
 
 
-cmdline_parse_inst_t cmd_recv_file = {
-	.f = cmd_recvfile_parsed,
+cmdline_parse_inst_t cmd_stats = {
+	.f = cmd_stats_parsed,
 	.data = NULL,
-	.help_str = "recv <file_path>",
+	.help_str = "show|clear port stats",
 	.tokens = {
-		(void *)&cmd_recv_file_recv,
-		(void *)&cmd_recv_file_filepath,
+		(void *)&cmd_stats_show,
+		(void *)&cmd_stats_port,
+		(void *)&cmd_stats_stats,
+		NULL,
+	},
+};
+
+/* *** SET FORWARDING MODE *** */
+struct cmd_set_fwd_mode_result {
+	cmdline_fixed_string_t set;
+	cmdline_fixed_string_t fwd;
+	cmdline_fixed_string_t mode;
+};
+
+static void
+cmd_set_fwd_mode_parsed(__attribute__((unused)) void *parsed_result,
+			__attribute__((unused)) struct cmdline *cl,
+			__attribute__((unused)) void *data)
+{
+	struct cmd_set_fwd_mode_result *res = parsed_result;
+	int i;
+
+	if (in_test) {
+		printf("Please stop traffic first.\n");
+		return;
+	}
+
+	for (i = 0; i < MAX_FWD_MODE; i++) {
+		if (!strcmp(res->mode, fwd_mode_s[i])) {
+			fwd_mode = i;
+			return;
+		}
+	}
+	printf("Invalid %s packet forwarding mode.\n", res->mode);
+}
+
+cmdline_parse_token_string_t cmd_setfwd_set =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_fwd_mode_result, set, "set");
+cmdline_parse_token_string_t cmd_setfwd_fwd =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_fwd_mode_result, fwd, "fwd");
+cmdline_parse_token_string_t cmd_setfwd_mode =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_fwd_mode_result, mode,
+				"file-trans#iofwd#txonly#rxonly");
+
+cmdline_parse_inst_t cmd_set_fwd_mode = {
+	.f = cmd_set_fwd_mode_parsed,
+	.data = NULL,
+	.help_str = "set forwarding mode as file-trans|rxonly|txonly|iofwd",
+	.tokens = {
+		(void *)&cmd_setfwd_set,
+		(void *)&cmd_setfwd_fwd,
+		(void *)&cmd_setfwd_mode,
 		NULL,
 	},
 };
@@ -276,7 +1008,10 @@ cmdline_parse_inst_t cmd_recv_file = {
 cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_help,
 	(cmdline_parse_inst_t *)&cmd_send_file,
-	(cmdline_parse_inst_t *)&cmd_recv_file,
+	(cmdline_parse_inst_t *)&cmd_start,
+	(cmdline_parse_inst_t *)&cmd_stop,
+	(cmdline_parse_inst_t *)&cmd_stats,
+	(cmdline_parse_inst_t *)&cmd_set_fwd_mode,
 	(cmdline_parse_inst_t *)&cmd_quit,
 	NULL,
 };
@@ -305,45 +1040,257 @@ signal_handler(int signum)
 	}
 }
 
+#define OPT_BUF_SIZE         "buf-size"
+#define OPT_FWD_MODE         "fwd-mode"
+#define OPT_NB_DESC          "nb-desc"
+#define OPT_TXFREET          "txfreet"
+#define OPT_BURST            "burst"
+#define OPT_QP               "qp"
+
+enum {
+	/* long options mapped to a short option */
+	OPT_NO_ZERO_COPY_NUM = 1,
+	OPT_BUF_SIZE_NUM,
+	OPT_FWD_MODE_NUM,
+	OPT_NB_DESC_NUM,
+	OPT_TXFREET_NUM,
+	OPT_BURST_NUM,
+	OPT_QP_NUM,
+};
+
+static const char short_options[] =
+	"i" /* interactive mode */
+	;
+
+static const struct option lgopts[] = {
+	{OPT_BUF_SIZE,     1, NULL, OPT_BUF_SIZE_NUM     },
+	{OPT_FWD_MODE,     1, NULL, OPT_FWD_MODE_NUM     },
+	{OPT_NB_DESC,      1, NULL, OPT_NB_DESC_NUM      },
+	{OPT_TXFREET,      1, NULL, OPT_TXFREET_NUM      },
+	{OPT_BURST,        1, NULL, OPT_BURST_NUM        },
+	{OPT_QP,           1, NULL, OPT_QP_NUM           },
+	{0,                0, NULL, 0                    }
+};
+
 static void
 ntb_usage(const char *prgname)
 {
 	printf("%s [EAL options] -- [options]\n"
-	       "-i : run in interactive mode (default value is 1)\n",
-	       prgname);
+	       "-i: run in interactive mode.\n"
+	       "-qp=N: set number of queues as N (N > 0, default: 1).\n"
+	       "--fwd-mode=N: set fwd mode (N: file-trans | rxonly | "
+	       "txonly | iofwd, default: file-trans)\n"
+	       "--buf-size=N: set mbuf dataroom size as N (0 < N < 65535,"
+	       " default: 2048).\n"
+	       "--nb-desc=N: set number of descriptors as N (%u <= N <= %u,"
+	       " default: 1024).\n"
+	       "--txfreet=N: set tx free thresh for NTB driver as N. (N >= 0)\n"
+	       "--burst=N: set pkt burst as N (0 < N <= %u default: 32).\n",
+	       prgname, NTB_MIN_DESC_SIZE, NTB_MAX_DESC_SIZE,
+	       NTB_MAX_PKT_BURST);
 }
 
-static int
-parse_args(int argc, char **argv)
+static void
+ntb_parse_args(int argc, char **argv)
 {
 	char *prgname = argv[0], **argvopt = argv;
-	int opt, ret;
+	int opt, opt_idx, n, i;
 
-	/* Only support interactive mode to send/recv file first. */
-	while ((opt = getopt(argc, argvopt, "i")) != EOF) {
+	while ((opt = getopt_long(argc, argvopt, short_options,
+				lgopts, &opt_idx)) != EOF) {
 		switch (opt) {
 		case 'i':
-			printf("Interactive-mode selected\n");
+			printf("Interactive-mode selected.\n");
 			interactive = 1;
 			break;
+		case OPT_QP_NUM:
+			n = atoi(optarg);
+			if (n > 0)
+				num_queues = n;
+			else
+				rte_exit(EXIT_FAILURE, "q must be > 0.\n");
+			break;
+		case OPT_BUF_SIZE_NUM:
+			n = atoi(optarg);
+			if (n > RTE_PKTMBUF_HEADROOM && n <= 0xFFFF)
+				ntb_buf_size = n;
+			else
+				rte_exit(EXIT_FAILURE, "buf-size must be > "
+					"%u and < 65536.\n",
+					RTE_PKTMBUF_HEADROOM);
+			break;
+		case OPT_FWD_MODE_NUM:
+			for (i = 0; i < MAX_FWD_MODE; i++) {
+				if (!strcmp(optarg, fwd_mode_s[i])) {
+					fwd_mode = i;
+					break;
+				}
+			}
+			if (i == MAX_FWD_MODE)
+				rte_exit(EXIT_FAILURE, "Unsupported mode. "
+				"(Should be: file-trans | rxonly | txonly "
+				"| iofwd)\n");
+			break;
+		case OPT_NB_DESC_NUM:
+			n = atoi(optarg);
+			if (n >= NTB_MIN_DESC_SIZE && n <= NTB_MAX_DESC_SIZE)
+				nb_desc = n;
+			else
+				rte_exit(EXIT_FAILURE, "nb-desc must be within"
+					" [%u, %u].\n", NTB_MIN_DESC_SIZE,
+					NTB_MAX_DESC_SIZE);
+			break;
+		case OPT_TXFREET_NUM:
+			n = atoi(optarg);
+			if (n >= 0)
+				tx_free_thresh = n;
+			else
+				rte_exit(EXIT_FAILURE, "txfreet must be"
+					" >= 0\n");
+			break;
+		case OPT_BURST_NUM:
+			n = atoi(optarg);
+			if (n > 0 && n <= NTB_MAX_PKT_BURST)
+				pkt_burst = n;
+			else
+				rte_exit(EXIT_FAILURE, "burst must be within "
+					"(0, %u].\n", NTB_MAX_PKT_BURST);
+			break;
 
 		default:
 			ntb_usage(prgname);
-			return -1;
+			rte_exit(EXIT_FAILURE,
+				 "Command line is incomplete or incorrect.\n");
+			break;
 		}
 	}
+}
 
-	if (optind >= 0)
-		argv[optind-1] = prgname;
+static void
+ntb_mempool_mz_free(__rte_unused struct rte_mempool_memhdr *memhdr,
+		void *opaque)
+{
+	const struct rte_memzone *mz = opaque;
+	rte_memzone_free(mz);
+}
 
-	ret = optind-1;
-	optind = 1; /* reset getopt lib */
-	return ret;
+static struct rte_mempool *
+ntb_mbuf_pool_create(uint16_t mbuf_seg_size, uint32_t nb_mbuf,
+		     struct ntb_dev_info ntb_info,
+		     struct ntb_dev_config *ntb_conf,
+		     unsigned int socket_id)
+{
+	size_t mz_len, total_elt_sz, max_mz_len, left_sz;
+	struct rte_pktmbuf_pool_private mbp_priv;
+	char pool_name[RTE_MEMPOOL_NAMESIZE];
+	char mz_name[RTE_MEMZONE_NAMESIZE];
+	const struct rte_memzone *mz;
+	struct rte_mempool *mp;
+	uint64_t align;
+	uint32_t mz_id;
+	int ret;
+
+	snprintf(pool_name, sizeof(pool_name), "ntb_mbuf_pool_%u", socket_id);
+	mp = rte_mempool_create_empty(pool_name, nb_mbuf,
+				      (mbuf_seg_size + sizeof(struct rte_mbuf)),
+				      MEMPOOL_CACHE_SIZE,
+				      sizeof(struct rte_pktmbuf_pool_private),
+				      socket_id, 0);
+	if (mp == NULL)
+		return NULL;
+
+	mbp_priv.mbuf_data_room_size = mbuf_seg_size;
+	mbp_priv.mbuf_priv_size = 0;
+	rte_pktmbuf_pool_init(mp, &mbp_priv);
+
+	ntb_conf->mz_list = rte_zmalloc("ntb_memzone_list",
+				sizeof(struct rte_memzone *) *
+				ntb_info.mw_cnt, 0);
+	if (ntb_conf->mz_list == NULL)
+		goto fail;
+
+	/* Put ntb header on mw0. */
+	if (ntb_info.mw_size[0] < ntb_info.ntb_hdr_size) {
+		printf("mw0 (size: %" PRIu64 ") is not enough for ntb hdr"
+		       " (size: %u)\n", ntb_info.mw_size[0],
+		       ntb_info.ntb_hdr_size);
+		goto fail;
+	}
+
+	total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
+	left_sz = total_elt_sz * nb_mbuf;
+	for (mz_id = 0; mz_id < ntb_info.mw_cnt; mz_id++) {
+		/* If populated mbuf is enough, no need to reserve extra mz. */
+		if (!left_sz)
+			break;
+		snprintf(mz_name, sizeof(mz_name), "ntb_mw_%d", mz_id);
+		align = ntb_info.mw_size_align ? ntb_info.mw_size[mz_id] :
+			RTE_CACHE_LINE_SIZE;
+		/* Reserve ntb header space on memzone 0. */
+		max_mz_len = mz_id ? ntb_info.mw_size[mz_id] :
+			     ntb_info.mw_size[mz_id] - ntb_info.ntb_hdr_size;
+		mz_len = left_sz <= max_mz_len ? left_sz :
+			(max_mz_len / total_elt_sz * total_elt_sz);
+		if (!mz_len)
+			continue;
+		mz = rte_memzone_reserve_aligned(mz_name, mz_len, socket_id,
+					RTE_MEMZONE_IOVA_CONTIG, align);
+		if (mz == NULL) {
+			printf("Cannot allocate %" PRIu64 " aligned memzone"
+				" %u\n", align, mz_id);
+			goto fail;
+		}
+		left_sz -= mz_len;
+
+		/* Reserve ntb header space on memzone 0. */
+		if (mz_id)
+			ret = rte_mempool_populate_iova(mp, mz->addr, mz->iova,
+					mz->len, ntb_mempool_mz_free,
+					(void *)(uintptr_t)mz);
+		else
+			ret = rte_mempool_populate_iova(mp,
+					(void *)((uint64_t)mz->addr +
+					ntb_info.ntb_hdr_size),
+					mz->iova + ntb_info.ntb_hdr_size,
+					mz->len - ntb_info.ntb_hdr_size,
+					ntb_mempool_mz_free,
+					(void *)(uintptr_t)mz);
+		if (ret < 0) {
+			rte_memzone_free(mz);
+			rte_mempool_free(mp);
+			return NULL;
+		}
+
+		ntb_conf->mz_list[mz_id] = mz;
+	}
+	if (left_sz) {
+		printf("mw space is not enough for mempool.\n");
+		goto fail;
+	}
+
+	ntb_conf->mz_num = mz_id;
+	rte_mempool_obj_iter(mp, rte_pktmbuf_init, NULL);
+
+	return mp;
+fail:
+	rte_mempool_free(mp);
+	return NULL;
 }
 
 int
 main(int argc, char **argv)
 {
+	struct rte_eth_conf eth_pconf = eth_port_conf;
+	struct rte_rawdev_info ntb_rawdev_conf;
+	struct rte_rawdev_info ntb_rawdev_info;
+	struct rte_eth_dev_info ethdev_info;
+	struct rte_eth_rxconf eth_rx_conf;
+	struct rte_eth_txconf eth_tx_conf;
+	struct ntb_queue_conf ntb_q_conf;
+	struct ntb_dev_config ntb_conf;
+	struct ntb_dev_info ntb_info;
+	uint64_t ntb_link_status;
+	uint32_t nb_mbuf;
 	int ret, i;
 
 	signal(SIGINT, signal_handler);
@@ -353,6 +1300,9 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "Error with EAL initialization.\n");
 
+	if (rte_lcore_count() < 2)
+		rte_exit(EXIT_FAILURE, "Need at least 2 cores\n");
+
 	/* Find 1st ntb rawdev. */
 	for (i = 0; i < RTE_RAWDEV_MAX_DEVS; i++)
 		if (rte_rawdevs[i].driver_name &&
@@ -368,15 +1318,118 @@ main(int argc, char **argv)
 	argc -= ret;
 	argv += ret;
 
-	ret = parse_args(argc, argv);
+	ntb_parse_args(argc, argv);
+
+	rte_rawdev_set_attr(dev_id, NTB_QUEUE_SZ_NAME, nb_desc);
+	printf("Set queue size as %u.\n", nb_desc);
+	rte_rawdev_set_attr(dev_id, NTB_QUEUE_NUM_NAME, num_queues);
+	printf("Set queue number as %u.\n", num_queues);
+	ntb_rawdev_info.dev_private = (rte_rawdev_obj_t)(&ntb_info);
+	rte_rawdev_info_get(dev_id, &ntb_rawdev_info);
+
+	nb_mbuf = nb_desc * num_queues * 2 * 2 + rte_lcore_count() *
+		  MEMPOOL_CACHE_SIZE;
+	mbuf_pool = ntb_mbuf_pool_create(ntb_buf_size, nb_mbuf, ntb_info,
+					 &ntb_conf, rte_socket_id());
+	if (mbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool.\n");
+
+	ntb_conf.num_queues = num_queues;
+	ntb_conf.queue_size = nb_desc;
+	ntb_rawdev_conf.dev_private = (rte_rawdev_obj_t)(&ntb_conf);
+	ret = rte_rawdev_configure(dev_id, &ntb_rawdev_conf);
+	if (ret)
+		rte_exit(EXIT_FAILURE, "Can't config ntb dev: err=%d, "
+			"port=%u\n", ret, dev_id);
+
+	ntb_q_conf.tx_free_thresh = tx_free_thresh;
+	ntb_q_conf.nb_desc = nb_desc;
+	ntb_q_conf.rx_mp = mbuf_pool;
+	for (i = 0; i < num_queues; i++) {
+		/* Setup rawdev queue */
+		ret = rte_rawdev_queue_setup(dev_id, i, &ntb_q_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE,
+				"Failed to setup ntb queue %u.\n", i);
+	}
+
+	/* Waiting for peer dev up at most 100s.*/
+	printf("Checking ntb link status...\n");
+	for (i = 0; i < 1000; i++) {
+		rte_rawdev_get_attr(dev_id, NTB_LINK_STATUS_NAME,
+				    &ntb_link_status);
+		if (ntb_link_status) {
+			printf("Peer dev ready, ntb link up.\n");
+			break;
+		}
+		rte_delay_ms(100);
+	}
+	rte_rawdev_get_attr(dev_id, NTB_LINK_STATUS_NAME, &ntb_link_status);
+	if (ntb_link_status == 0)
+		printf("Expire 100s. Link is not up. Please restart app.\n");
+
+	ret = rte_rawdev_start(dev_id);
 	if (ret < 0)
-		rte_exit(EXIT_FAILURE, "Invalid arguments\n");
+		rte_exit(EXIT_FAILURE, "rte_rawdev_start: err=%d, port=%u\n",
+			ret, dev_id);
+
+	/* Find 1st ethdev */
+	eth_port_id = rte_eth_find_next(0);
 
-	rte_rawdev_start(dev_id);
+	if (eth_port_id < RTE_MAX_ETHPORTS) {
+		rte_eth_dev_info_get(eth_port_id, &ethdev_info);
+		eth_pconf.rx_adv_conf.rss_conf.rss_hf &=
+				ethdev_info.flow_type_rss_offloads;
+		ret = rte_eth_dev_configure(eth_port_id, num_queues,
+					    num_queues, &eth_pconf);
+		if (ret)
+			rte_exit(EXIT_FAILURE, "Can't config ethdev: err=%d, "
+				"port=%u\n", ret, eth_port_id);
+		eth_rx_conf = ethdev_info.default_rxconf;
+		eth_rx_conf.offloads = eth_pconf.rxmode.offloads;
+		eth_tx_conf = ethdev_info.default_txconf;
+		eth_tx_conf.offloads = eth_pconf.txmode.offloads;
+
+		/* Setup ethdev queue if ethdev exists */
+		for (i = 0; i < num_queues; i++) {
+			ret = rte_eth_rx_queue_setup(eth_port_id, i, nb_desc,
+					rte_eth_dev_socket_id(eth_port_id),
+					&eth_rx_conf, mbuf_pool);
+			if (ret < 0)
+				rte_exit(EXIT_FAILURE,
+					"Failed to setup eth rxq %u.\n", i);
+			ret = rte_eth_tx_queue_setup(eth_port_id, i, nb_desc,
+					rte_eth_dev_socket_id(eth_port_id),
+					&eth_tx_conf);
+			if (ret < 0)
+				rte_exit(EXIT_FAILURE,
+					"Failed to setup eth txq %u.\n", i);
+		}
+
+		ret = rte_eth_dev_start(eth_port_id);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: err=%d, "
+				"port=%u\n", ret, eth_port_id);
+	}
+
+	/* initialize port stats */
+	memset(&ntb_port_stats, 0, sizeof(ntb_port_stats));
+
+	/* Set default fwd mode if user doesn't set it. */
+	if (fwd_mode == MAX_FWD_MODE && eth_port_id < RTE_MAX_ETHPORTS) {
+		printf("Set default fwd mode as iofwd.\n");
+		fwd_mode = IOFWD;
+	}
+	if (fwd_mode == MAX_FWD_MODE) {
+		printf("Set default fwd mode as file-trans.\n");
+		fwd_mode = FILE_TRANS;
+	}
 
 	if (interactive) {
 		sleep(1);
 		prompt();
+	} else {
+		start_pkt_fwd();
 	}
 
 	return 0;
-- 
2.17.1