Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 780 insertions, 0 deletions

diff --git a/examples/ptpclient/ptpclient.c b/examples/ptpclient/ptpclient.c
new file mode 100644
index 00000000..0af4f3b6
--- /dev/null
+++ b/examples/ptpclient/ptpclient.c
@@ -0,0 +1,780 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   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 Intel Corporation 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.
+ */
+
+/*
+ * This application is a simple Layer 2 PTP v2 client. It shows delta values
+ * which are used to synchronize the PHC clock. if the "-T 1" parameter is
+ * passed to the application the Linux kernel clock is also synchronized.
+ */
+
+#include <stdint.h>
+#include <inttypes.h>
+#include <rte_eal.h>
+#include <rte_ethdev.h>
+#include <rte_cycles.h>
+#include <rte_lcore.h>
+#include <rte_mbuf.h>
+#include <rte_ip.h>
+#include <limits.h>
+#include <sys/time.h>
+#include <getopt.h>
+
+#define RX_RING_SIZE 128
+#define TX_RING_SIZE 512
+
+#define NUM_MBUFS            8191
+#define MBUF_CACHE_SIZE       250
+
+/* Values for the PTP messageType field. */
+#define SYNC                  0x0
+#define DELAY_REQ             0x1
+#define PDELAY_REQ            0x2
+#define PDELAY_RESP           0x3
+#define FOLLOW_UP             0x8
+#define DELAY_RESP            0x9
+#define PDELAY_RESP_FOLLOW_UP 0xA
+#define ANNOUNCE              0xB
+#define SIGNALING             0xC
+#define MANAGEMENT            0xD
+
+#define NSEC_PER_SEC        1000000000L
+#define KERNEL_TIME_ADJUST_LIMIT  20000
+#define PTP_PROTOCOL             0x88F7
+
+struct rte_mempool *mbuf_pool;
+uint32_t ptp_enabled_port_mask;
+uint8_t ptp_enabled_port_nb;
+static uint8_t ptp_enabled_ports[RTE_MAX_ETHPORTS];
+
+static const struct rte_eth_conf port_conf_default = {
+	.rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
+};
+
+static const struct ether_addr ether_multicast = {
+	.addr_bytes = {0x01, 0x1b, 0x19, 0x0, 0x0, 0x0}
+};
+
+/* Structs used for PTP handling. */
+struct tstamp {
+	uint16_t   sec_msb;
+	uint32_t   sec_lsb;
+	uint32_t   ns;
+}  __attribute__((packed));
+
+struct clock_id {
+	uint8_t id[8];
+};
+
+struct port_id {
+	struct clock_id        clock_id;
+	uint16_t               port_number;
+}  __attribute__((packed));
+
+struct ptp_header {
+	uint8_t              msg_type;
+	uint8_t              ver;
+	uint16_t             message_length;
+	uint8_t              domain_number;
+	uint8_t              reserved1;
+	uint8_t              flag_field[2];
+	int64_t              correction;
+	uint32_t             reserved2;
+	struct port_id       source_port_id;
+	uint16_t             seq_id;
+	uint8_t              control;
+	int8_t               log_message_interval;
+} __attribute__((packed));
+
+struct sync_msg {
+	struct ptp_header   hdr;
+	struct tstamp       origin_tstamp;
+} __attribute__((packed));
+
+struct follow_up_msg {
+	struct ptp_header   hdr;
+	struct tstamp       precise_origin_tstamp;
+	uint8_t             suffix[0];
+} __attribute__((packed));
+
+struct delay_req_msg {
+	struct ptp_header   hdr;
+	struct tstamp       origin_tstamp;
+} __attribute__((packed));
+
+struct delay_resp_msg {
+	struct ptp_header    hdr;
+	struct tstamp        rx_tstamp;
+	struct port_id       req_port_id;
+	uint8_t              suffix[0];
+} __attribute__((packed));
+
+struct ptp_message {
+	union {
+		struct ptp_header          header;
+		struct sync_msg            sync;
+		struct delay_req_msg       delay_req;
+		struct follow_up_msg       follow_up;
+		struct delay_resp_msg      delay_resp;
+	} __attribute__((packed));
+};
+
+struct ptpv2_data_slave_ordinary {
+	struct rte_mbuf *m;
+	struct timespec tstamp1;
+	struct timespec tstamp2;
+	struct timespec tstamp3;
+	struct timespec tstamp4;
+	struct clock_id client_clock_id;
+	struct clock_id master_clock_id;
+	struct timeval new_adj;
+	int64_t delta;
+	uint8_t portid;
+	uint16_t seqID_SYNC;
+	uint16_t seqID_FOLLOWUP;
+	uint8_t ptpset;
+	uint8_t kernel_time_set;
+	uint8_t current_ptp_port;
+};
+
+static struct ptpv2_data_slave_ordinary ptp_data;
+
+static inline uint64_t timespec64_to_ns(const struct timespec *ts)
+{
+	return ((uint64_t) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
+}
+
+static struct timeval
+ns_to_timeval(int64_t nsec)
+{
+	struct timespec t_spec = {0, 0};
+	struct timeval t_eval = {0, 0};
+	int32_t rem;
+
+	if (nsec == 0)
+		return t_eval;
+	rem = nsec % NSEC_PER_SEC;
+	t_spec.tv_sec = nsec / NSEC_PER_SEC;
+
+	if (rem < 0) {
+		t_spec.tv_sec--;
+		rem += NSEC_PER_SEC;
+	}
+
+	t_spec.tv_nsec = rem;
+	t_eval.tv_sec = t_spec.tv_sec;
+	t_eval.tv_usec = t_spec.tv_nsec / 1000;
+
+	return t_eval;
+}
+
+/*
+ * Initializes a given port using global settings and with the RX buffers
+ * coming from the mbuf_pool passed as a parameter.
+ */
+static inline int
+port_init(uint8_t port, struct rte_mempool *mbuf_pool)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_conf port_conf = port_conf_default;
+	const uint16_t rx_rings = 1;
+	const uint16_t tx_rings = 1;
+	int retval;
+	uint16_t q;
+
+	if (port >= rte_eth_dev_count())
+		return -1;
+
+	/* Configure the Ethernet device. */
+	retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
+	if (retval != 0)
+		return retval;
+
+	/* Allocate and set up 1 RX queue per Ethernet port. */
+	for (q = 0; q < rx_rings; q++) {
+		retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
+				rte_eth_dev_socket_id(port), NULL, mbuf_pool);
+
+		if (retval < 0)
+			return retval;
+	}
+
+	/* Allocate and set up 1 TX queue per Ethernet port. */
+	for (q = 0; q < tx_rings; q++) {
+		/* Setup txq_flags */
+		struct rte_eth_txconf *txconf;
+
+		rte_eth_dev_info_get(q, &dev_info);
+		txconf = &dev_info.default_txconf;
+		txconf->txq_flags = 0;
+
+		retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
+				rte_eth_dev_socket_id(port), txconf);
+		if (retval < 0)
+			return retval;
+	}
+
+	/* Start the Ethernet port. */
+	retval = rte_eth_dev_start(port);
+	if (retval < 0)
+		return retval;
+
+	/* Enable timesync timestamping for the Ethernet device */
+	rte_eth_timesync_enable(port);
+
+	/* Enable RX in promiscuous mode for the Ethernet device. */
+	rte_eth_promiscuous_enable(port);
+
+	return 0;
+}
+
+static void
+print_clock_info(struct ptpv2_data_slave_ordinary *ptp_data)
+{
+	int64_t nsec;
+	struct timespec net_time, sys_time;
+
+	printf("Master Clock id: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
+		ptp_data->master_clock_id.id[0],
+		ptp_data->master_clock_id.id[1],
+		ptp_data->master_clock_id.id[2],
+		ptp_data->master_clock_id.id[3],
+		ptp_data->master_clock_id.id[4],
+		ptp_data->master_clock_id.id[5],
+		ptp_data->master_clock_id.id[6],
+		ptp_data->master_clock_id.id[7]);
+
+	printf("\nT2 - Slave  Clock.  %lds %ldns",
+			(ptp_data->tstamp2.tv_sec),
+			(ptp_data->tstamp2.tv_nsec));
+
+	printf("\nT1 - Master Clock.  %lds %ldns ",
+			ptp_data->tstamp1.tv_sec,
+			(ptp_data->tstamp1.tv_nsec));
+
+	printf("\nT3 - Slave  Clock.  %lds %ldns",
+			ptp_data->tstamp3.tv_sec,
+			(ptp_data->tstamp3.tv_nsec));
+
+	printf("\nT4 - Master Clock.  %lds %ldns ",
+			ptp_data->tstamp4.tv_sec,
+			(ptp_data->tstamp4.tv_nsec));
+
+	printf("\nDelta between master and slave clocks:%"PRId64"ns\n",
+			ptp_data->delta);
+
+	clock_gettime(CLOCK_REALTIME, &sys_time);
+	rte_eth_timesync_read_time(ptp_data->current_ptp_port, &net_time);
+
+	time_t ts = net_time.tv_sec;
+
+	printf("\n\nComparison between Linux kernel Time and PTP:");
+
+	printf("\nCurrent PTP Time: %.24s %.9ld ns",
+			ctime(&ts), net_time.tv_nsec);
+
+	nsec = (int64_t)timespec64_to_ns(&net_time) -
+			(int64_t)timespec64_to_ns(&sys_time);
+	ptp_data->new_adj = ns_to_timeval(nsec);
+
+	gettimeofday(&ptp_data->new_adj, NULL);
+
+	time_t tp = ptp_data->new_adj.tv_sec;
+
+	printf("\nCurrent SYS Time: %.24s %.6ld ns",
+				ctime(&tp), ptp_data->new_adj.tv_usec);
+
+	printf("\nDelta between PTP and Linux Kernel time:%"PRId64"ns\n",
+				nsec);
+
+	printf("[Ctrl+C to quit]\n");
+
+	/* Clear screen and put cursor in column 1, row 1 */
+	printf("\033[2J\033[1;1H");
+}
+
+static int64_t
+delta_eval(struct ptpv2_data_slave_ordinary *ptp_data)
+{
+	int64_t delta;
+	uint64_t t1 = 0;
+	uint64_t t2 = 0;
+	uint64_t t3 = 0;
+	uint64_t t4 = 0;
+
+	t1 = timespec64_to_ns(&ptp_data->tstamp1);
+	t2 = timespec64_to_ns(&ptp_data->tstamp2);
+	t3 = timespec64_to_ns(&ptp_data->tstamp3);
+	t4 = timespec64_to_ns(&ptp_data->tstamp4);
+
+	delta = -((int64_t)((t2 - t1) - (t4 - t3))) / 2;
+
+	return delta;
+}
+
+/*
+ * Parse the PTP SYNC message.
+ */
+static void
+parse_sync(struct ptpv2_data_slave_ordinary *ptp_data, uint16_t rx_tstamp_idx)
+{
+	struct ptp_header *ptp_hdr;
+
+	ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(ptp_data->m, char *)
+			+ sizeof(struct ether_hdr));
+	ptp_data->seqID_SYNC = rte_be_to_cpu_16(ptp_hdr->seq_id);
+
+	if (ptp_data->ptpset == 0) {
+		rte_memcpy(&ptp_data->master_clock_id,
+				&ptp_hdr->source_port_id.clock_id,
+				sizeof(struct clock_id));
+		ptp_data->ptpset = 1;
+	}
+
+	if (memcmp(&ptp_hdr->source_port_id.clock_id,
+			&ptp_hdr->source_port_id.clock_id,
+			sizeof(struct clock_id)) == 0) {
+
+		if (ptp_data->ptpset == 1)
+			rte_eth_timesync_read_rx_timestamp(ptp_data->portid,
+					&ptp_data->tstamp2, rx_tstamp_idx);
+	}
+
+}
+
+/*
+ * Parse the PTP FOLLOWUP message and send DELAY_REQ to the master clock.
+ */
+static void
+parse_fup(struct ptpv2_data_slave_ordinary *ptp_data)
+{
+	struct ether_hdr *eth_hdr;
+	struct ptp_header *ptp_hdr;
+	struct clock_id *client_clkid;
+	struct ptp_message *ptp_msg;
+	struct rte_mbuf *created_pkt;
+	struct tstamp *origin_tstamp;
+	struct ether_addr eth_multicast = ether_multicast;
+	size_t pkt_size;
+	int wait_us;
+	struct rte_mbuf *m = ptp_data->m;
+
+	eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(m, char *)
+			+ sizeof(struct ether_hdr));
+	if (memcmp(&ptp_data->master_clock_id,
+			&ptp_hdr->source_port_id.clock_id,
+			sizeof(struct clock_id)) != 0)
+		return;
+
+	ptp_data->seqID_FOLLOWUP = rte_be_to_cpu_16(ptp_hdr->seq_id);
+	ptp_msg = (struct ptp_message *) (rte_pktmbuf_mtod(m, char *) +
+					  sizeof(struct ether_hdr));
+
+	origin_tstamp = &ptp_msg->follow_up.precise_origin_tstamp;
+	ptp_data->tstamp1.tv_nsec = ntohl(origin_tstamp->ns);
+	ptp_data->tstamp1.tv_sec =
+		((uint64_t)ntohl(origin_tstamp->sec_lsb)) |
+		(((uint64_t)ntohs(origin_tstamp->sec_msb)) << 32);
+
+	if (ptp_data->seqID_FOLLOWUP == ptp_data->seqID_SYNC) {
+
+		created_pkt = rte_pktmbuf_alloc(mbuf_pool);
+		pkt_size = sizeof(struct ether_hdr) +
+			sizeof(struct ptp_message);
+		created_pkt->data_len = pkt_size;
+		created_pkt->pkt_len = pkt_size;
+		eth_hdr = rte_pktmbuf_mtod(created_pkt, struct ether_hdr *);
+		rte_eth_macaddr_get(ptp_data->portid, &eth_hdr->s_addr);
+
+		/* Set multicast address 01-1B-19-00-00-00. */
+		ether_addr_copy(&eth_multicast, &eth_hdr->d_addr);
+
+		eth_hdr->ether_type = htons(PTP_PROTOCOL);
+		ptp_msg = (struct ptp_message *)
+			(rte_pktmbuf_mtod(created_pkt, char *) +
+			sizeof(struct ether_hdr));
+
+		ptp_msg->delay_req.hdr.seq_id = htons(ptp_data->seqID_SYNC);
+		ptp_msg->delay_req.hdr.msg_type = DELAY_REQ;
+		ptp_msg->delay_req.hdr.ver = 2;
+		ptp_msg->delay_req.hdr.control = 1;
+		ptp_msg->delay_req.hdr.log_message_interval = 127;
+
+		/* Set up clock id. */
+		client_clkid =
+			&ptp_msg->delay_req.hdr.source_port_id.clock_id;
+
+		client_clkid->id[0] = eth_hdr->s_addr.addr_bytes[0];
+		client_clkid->id[1] = eth_hdr->s_addr.addr_bytes[1];
+		client_clkid->id[2] = eth_hdr->s_addr.addr_bytes[2];
+		client_clkid->id[3] = 0xFF;
+		client_clkid->id[4] = 0xFE;
+		client_clkid->id[5] = eth_hdr->s_addr.addr_bytes[3];
+		client_clkid->id[6] = eth_hdr->s_addr.addr_bytes[4];
+		client_clkid->id[7] = eth_hdr->s_addr.addr_bytes[5];
+
+		rte_memcpy(&ptp_data->client_clock_id,
+			   client_clkid,
+			   sizeof(struct clock_id));
+
+		/* Enable flag for hardware timestamping. */
+		created_pkt->ol_flags |= PKT_TX_IEEE1588_TMST;
+
+		/*Read value from NIC to prevent latching with old value. */
+		rte_eth_timesync_read_tx_timestamp(ptp_data->portid,
+				&ptp_data->tstamp3);
+
+		/* Transmit the packet. */
+		rte_eth_tx_burst(ptp_data->portid, 0, &created_pkt, 1);
+
+		wait_us = 0;
+		ptp_data->tstamp3.tv_nsec = 0;
+		ptp_data->tstamp3.tv_sec = 0;
+
+		/* Wait at least 1 us to read TX timestamp. */
+		while ((rte_eth_timesync_read_tx_timestamp(ptp_data->portid,
+				&ptp_data->tstamp3) < 0) && (wait_us < 1000)) {
+			rte_delay_us(1);
+			wait_us++;
+		}
+	}
+}
+
+/*
+ * Update the kernel time with the difference between it and the current NIC
+ * time.
+ */
+static inline void
+update_kernel_time(void)
+{
+	int64_t nsec;
+	struct timespec net_time, sys_time;
+
+	clock_gettime(CLOCK_REALTIME, &sys_time);
+	rte_eth_timesync_read_time(ptp_data.current_ptp_port, &net_time);
+
+	nsec = (int64_t)timespec64_to_ns(&net_time) -
+	       (int64_t)timespec64_to_ns(&sys_time);
+
+	ptp_data.new_adj = ns_to_timeval(nsec);
+
+	/*
+	 * If difference between kernel time and system time in NIC is too big
+	 * (more than +/- 20 microseconds), use clock_settime to set directly
+	 * the kernel time, as adjtime is better for small adjustments (takes
+	 * longer to adjust the time).
+	 */
+
+	if (nsec > KERNEL_TIME_ADJUST_LIMIT || nsec < -KERNEL_TIME_ADJUST_LIMIT)
+		clock_settime(CLOCK_REALTIME, &net_time);
+	else
+		adjtime(&ptp_data.new_adj, 0);
+
+
+}
+
+/*
+ * Parse the DELAY_RESP message.
+ */
+static void
+parse_drsp(struct ptpv2_data_slave_ordinary *ptp_data)
+{
+	struct rte_mbuf *m = ptp_data->m;
+	struct ptp_message *ptp_msg;
+	struct tstamp *rx_tstamp;
+	uint16_t seq_id;
+
+	ptp_msg = (struct ptp_message *) (rte_pktmbuf_mtod(m, char *) +
+					sizeof(struct ether_hdr));
+	seq_id = rte_be_to_cpu_16(ptp_msg->delay_resp.hdr.seq_id);
+	if (memcmp(&ptp_data->client_clock_id,
+		   &ptp_msg->delay_resp.req_port_id.clock_id,
+		   sizeof(struct clock_id)) == 0) {
+		if (seq_id == ptp_data->seqID_FOLLOWUP) {
+			rx_tstamp = &ptp_msg->delay_resp.rx_tstamp;
+			ptp_data->tstamp4.tv_nsec = ntohl(rx_tstamp->ns);
+			ptp_data->tstamp4.tv_sec =
+				((uint64_t)ntohl(rx_tstamp->sec_lsb)) |
+				(((uint64_t)ntohs(rx_tstamp->sec_msb)) << 32);
+
+			/* Evaluate the delta for adjustment. */
+			ptp_data->delta = delta_eval(ptp_data);
+
+			rte_eth_timesync_adjust_time(ptp_data->portid,
+						     ptp_data->delta);
+
+			ptp_data->current_ptp_port = ptp_data->portid;
+
+			/* Update kernel time if enabled in app parameters. */
+			if (ptp_data->kernel_time_set == 1)
+				update_kernel_time();
+
+
+
+		}
+	}
+}
+
+/* This function processes PTP packets, implementing slave PTP IEEE1588 L2
+ * functionality.
+ */
+static void
+parse_ptp_frames(uint8_t portid, struct rte_mbuf *m) {
+	struct ptp_header *ptp_hdr;
+	struct ether_hdr *eth_hdr;
+	uint16_t eth_type;
+
+	eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	eth_type = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+	if (eth_type == PTP_PROTOCOL) {
+		ptp_data.m = m;
+		ptp_data.portid = portid;
+		ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(m, char *)
+					+ sizeof(struct ether_hdr));
+
+		switch (ptp_hdr->msg_type) {
+		case SYNC:
+			parse_sync(&ptp_data, m->timesync);
+			break;
+		case FOLLOW_UP:
+			parse_fup(&ptp_data);
+			break;
+		case DELAY_RESP:
+			parse_drsp(&ptp_data);
+			print_clock_info(&ptp_data);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+/*
+ * The lcore main. This is the main thread that does the work, reading from an
+ * input port and writing to an output port.
+ */
+static __attribute__((noreturn)) void
+lcore_main(void)
+{
+	uint8_t portid;
+	unsigned nb_rx;
+	struct rte_mbuf *m;
+
+	/*
+	 * Check that the port is on the same NUMA node as the polling thread
+	 * for best performance.
+	 */
+	printf("\nCore %u Waiting for SYNC packets. [Ctrl+C to quit]\n",
+			rte_lcore_id());
+
+	/* Run until the application is quit or killed. */
+
+	while (1) {
+		/* Read packet from RX queues. */
+		for (portid = 0; portid < ptp_enabled_port_nb; portid++) {
+
+			portid = ptp_enabled_ports[portid];
+			nb_rx = rte_eth_rx_burst(portid, 0, &m, 1);
+
+			if (likely(nb_rx == 0))
+				continue;
+
+			if (m->ol_flags & PKT_RX_IEEE1588_PTP)
+				parse_ptp_frames(portid, m);
+
+			rte_pktmbuf_free(m);
+		}
+	}
+}
+
+static void
+print_usage(const char *prgname)
+{
+	printf("%s [EAL options] -- -p PORTMASK -T VALUE\n"
+		" -T VALUE: 0 - Disable, 1 - Enable Linux Clock"
+		" Synchronization (0 default)\n"
+		" -p PORTMASK: hexadecimal bitmask of ports to configure\n",
+		prgname);
+}
+
+static int
+ptp_parse_portmask(const char *portmask)
+{
+	char *end = NULL;
+	unsigned long pm;
+
+	/* Parse the hexadecimal string. */
+	pm = strtoul(portmask, &end, 16);
+
+	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (pm == 0)
+		return -1;
+
+	return pm;
+}
+
+static int
+parse_ptp_kernel(const char *param)
+{
+	char *end = NULL;
+	unsigned long pm;
+
+	/* Parse the hexadecimal string. */
+	pm = strtoul(param, &end, 16);
+
+	if ((param[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (pm == 0)
+		return 0;
+
+	return 1;
+}
+
+/* Parse the commandline arguments. */
+static int
+ptp_parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	static struct option lgopts[] = { {NULL, 0, 0, 0} };
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "p:T:",
+				  lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+
+		/* Portmask. */
+		case 'p':
+			ptp_enabled_port_mask = ptp_parse_portmask(optarg);
+			if (ptp_enabled_port_mask == 0) {
+				printf("invalid portmask\n");
+				print_usage(prgname);
+				return -1;
+			}
+			break;
+		/* Time synchronization. */
+		case 'T':
+			ret = parse_ptp_kernel(optarg);
+			if (ret < 0) {
+				print_usage(prgname);
+				return -1;
+			}
+
+			ptp_data.kernel_time_set = ret;
+			break;
+
+		default:
+			print_usage(prgname);
+			return -1;
+		}
+	}
+
+	argv[optind-1] = prgname;
+
+	optind = 0; /* Reset getopt lib. */
+
+	return 0;
+}
+
+/*
+ * The main function, which does initialization and calls the per-lcore
+ * functions.
+ */
+int
+main(int argc, char *argv[])
+{
+	unsigned nb_ports;
+
+	uint8_t portid;
+
+	/* Initialize the Environment Abstraction Layer (EAL). */
+	int ret = rte_eal_init(argc, argv);
+
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+
+	memset(&ptp_data, '\0', sizeof(struct ptpv2_data_slave_ordinary));
+
+	argc -= ret;
+	argv += ret;
+
+	ret = ptp_parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Error with PTP initialization\n");
+
+	/* Check that there is an even number of ports to send/receive on. */
+	nb_ports = rte_eth_dev_count();
+
+	/* Creates a new mempool in memory to hold the mbufs. */
+	mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
+		MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+
+	if (mbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
+
+	/* Initialize all ports. */
+	for (portid = 0; portid < nb_ports; portid++) {
+		if ((ptp_enabled_port_mask & (1 << portid)) != 0) {
+			if (port_init(portid, mbuf_pool) == 0) {
+				ptp_enabled_ports[ptp_enabled_port_nb] = portid;
+				ptp_enabled_port_nb++;
+			} else {
+				rte_exit(EXIT_FAILURE,
+					 "Cannot init port %"PRIu8 "\n",
+					 portid);
+			}
+		} else
+			printf("Skipping disabled port %u\n", portid);
+	}
+
+	if (ptp_enabled_port_nb == 0) {
+		rte_exit(EXIT_FAILURE,
+			"All available ports are disabled."
+			" Please set portmask.\n");
+	}
+
+	if (rte_lcore_count() > 1)
+		printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
+
+	/* Call lcore_main on the master core only. */
+	lcore_main();
+
+	return 0;
+}