[dpdk-dev] [PATCH v2 08/11] examples/l3fwd: add event lpm main loop

[<pbhagavatula@marvell.com>]

From: Pavan Nikhilesh <pbhagavatula@marvell.com>

Add lpm main loop for handling events based on capabilities of the
event device.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
---
 examples/l3fwd/l3fwd.h       |   9 ++
 examples/l3fwd/l3fwd_event.c |   9 ++
 examples/l3fwd/l3fwd_event.h |   5 +
 examples/l3fwd/l3fwd_lpm.c   | 231 +++++++++++++++++++++++++++++++++++
 examples/l3fwd/main.c        |  10 +-
 5 files changed, 260 insertions(+), 4 deletions(-)

diff --git a/examples/l3fwd/l3fwd.h b/examples/l3fwd/l3fwd.h
index 6d16cde74..8f2e4be23 100644
--- a/examples/l3fwd/l3fwd.h
+++ b/examples/l3fwd/l3fwd.h
@@ -212,6 +212,15 @@ em_main_loop(__attribute__((unused)) void *dummy);
 int
 lpm_main_loop(__attribute__((unused)) void *dummy);
 
+int
+lpm_event_main_loop_tx_d(__attribute__((unused)) void *dummy);
+int
+lpm_event_main_loop_tx_d_burst(__attribute__((unused)) void *dummy);
+int
+lpm_event_main_loop_tx_q(__attribute__((unused)) void *dummy);
+int
+lpm_event_main_loop_tx_q_burst(__attribute__((unused)) void *dummy);
+
 /* Return ipv4/ipv6 fwd lookup struct for LPM or EM. */
 void *
 em_get_ipv4_l3fwd_lookup_struct(const int socketid);
diff --git a/examples/l3fwd/l3fwd_event.c b/examples/l3fwd/l3fwd_event.c
index 0e796f003..c7de046e3 100644
--- a/examples/l3fwd/l3fwd_event.c
+++ b/examples/l3fwd/l3fwd_event.c
@@ -235,6 +235,12 @@ void
 l3fwd_event_resource_setup(struct rte_eth_conf *port_conf)
 {
 	struct l3fwd_event_resources *evt_rsrc = l3fwd_get_eventdev_rsrc();
+	const event_loop_cb lpm_event_loop[2][2] = {
+		[0][0] = lpm_event_main_loop_tx_d,
+		[0][1] = lpm_event_main_loop_tx_d_burst,
+		[1][0] = lpm_event_main_loop_tx_q,
+		[1][1] = lpm_event_main_loop_tx_q_burst,
+	};
 	uint32_t event_queue_cfg;
 	int ret;
 
@@ -268,4 +274,7 @@ l3fwd_event_resource_setup(struct rte_eth_conf *port_conf)
 	ret = rte_event_dev_start(evt_rsrc->event_d_id);
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "Error in starting eventdev");
+
+	evt_rsrc->ops.lpm_event_loop = lpm_event_loop[evt_rsrc->tx_mode_q]
+						       [evt_rsrc->has_burst];
 }
diff --git a/examples/l3fwd/l3fwd_event.h b/examples/l3fwd/l3fwd_event.h
index 9d8bd5a36..fcc0ce51a 100644
--- a/examples/l3fwd/l3fwd_event.h
+++ b/examples/l3fwd/l3fwd_event.h
@@ -14,6 +14,11 @@
 
 #include "l3fwd.h"
 
+#define L3FWD_EVENT_SINGLE     0x1
+#define L3FWD_EVENT_BURST      0x2
+#define L3FWD_EVENT_TX_DIRECT  0x4
+#define L3FWD_EVENT_TX_ENQ     0x8
+
 #define CMD_LINE_OPT_MODE "mode"
 #define CMD_LINE_OPT_EVENTQ_SYNC "eventq-sched"
 
diff --git a/examples/l3fwd/l3fwd_lpm.c b/examples/l3fwd/l3fwd_lpm.c
index 349de2703..c4669d6d5 100644
--- a/examples/l3fwd/l3fwd_lpm.c
+++ b/examples/l3fwd/l3fwd_lpm.c
@@ -28,6 +28,7 @@
 #include <rte_lpm6.h>
 
 #include "l3fwd.h"
+#include "l3fwd_event.h"
 
 struct ipv4_l3fwd_lpm_route {
 	uint32_t ip;
@@ -254,6 +255,236 @@ lpm_main_loop(__attribute__((unused)) void *dummy)
 	return 0;
 }
 
+static __rte_always_inline void
+lpm_event_loop_single(struct l3fwd_event_resources *evt_rsrc,
+		const uint8_t flags)
+{
+	const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
+	const uint8_t tx_q_id = evt_rsrc->evq.event_q_id[
+		evt_rsrc->evq.nb_queues - 1];
+	const uint8_t event_d_id = evt_rsrc->event_d_id;
+	struct lcore_conf *lconf;
+	unsigned int lcore_id;
+	struct rte_event ev;
+
+	if (event_p_id < 0)
+		return;
+
+	lcore_id = rte_lcore_id();
+	lconf = &lcore_conf[lcore_id];
+
+	RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);
+	while (!force_quit) {
+		if (!rte_event_dequeue_burst(event_d_id, event_p_id, &ev, 1, 0))
+			continue;
+
+		struct rte_mbuf *mbuf = ev.mbuf;
+		mbuf->port = lpm_get_dst_port(lconf, mbuf, mbuf->port);
+
+#if defined RTE_ARCH_X86 || defined RTE_MACHINE_CPUFLAG_NEON \
+				|| defined RTE_ARCH_PPC_64
+		process_packet(mbuf, &mbuf->port);
+#else
+
+		struct rte_ether_hdr *eth_hdr = rte_pktmbuf_mtod(mbuf,
+							struct rte_ether_hdr *);
+#ifdef DO_RFC_1812_CHECKS
+		struct rte_ipv4_hdr *ipv4_hdr;
+		if (RTE_ETH_IS_IPV4_HDR(mbuf->packet_type)) {
+			/* Handle IPv4 headers.*/
+			ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf,
+					struct rte_ipv4_hdr *,
+					sizeof(struct rte_ether_hdr));
+
+			if (is_valid_ipv4_pkt(ipv4_hdr, mbuf->pkt_len)
+					< 0) {
+				mbuf->port = BAD_PORT;
+				continue;
+			}
+			/* Update time to live and header checksum */
+			--(ipv4_hdr->time_to_live);
+			++(ipv4_hdr->hdr_checksum);
+		}
+#endif
+		/* dst addr */
+		*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[mbuf->port];
+
+		/* src addr */
+		rte_ether_addr_copy(&ports_eth_addr[mbuf->port],
+				&eth_hdr->s_addr);
+#endif
+		if (mbuf->port == BAD_PORT) {
+			rte_pktmbuf_free(mbuf);
+			continue;
+		}
+
+		if (flags & L3FWD_EVENT_TX_ENQ) {
+			ev.queue_id = tx_q_id;
+			ev.op = RTE_EVENT_OP_FORWARD;
+			while (rte_event_enqueue_burst(event_d_id, event_p_id,
+						&ev, 1) && !force_quit)
+				;
+		}
+
+		if (flags & L3FWD_EVENT_TX_DIRECT) {
+			rte_event_eth_tx_adapter_txq_set(mbuf, 0);
+			while (!rte_event_eth_tx_adapter_enqueue(event_d_id,
+						event_p_id, &ev, 1, 0) &&
+					!force_quit)
+				;
+		}
+	}
+}
+
+static __rte_always_inline void
+lpm_event_loop_burst(struct l3fwd_event_resources *evt_rsrc,
+		const uint8_t flags)
+{
+	const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
+	const uint8_t tx_q_id = evt_rsrc->evq.event_q_id[
+		evt_rsrc->evq.nb_queues - 1];
+	const uint8_t event_d_id = evt_rsrc->event_d_id;
+	const uint16_t deq_len = evt_rsrc->deq_depth;
+	struct rte_event events[MAX_PKT_BURST];
+	struct lcore_conf *lconf;
+	unsigned int lcore_id;
+	int i, nb_enq, nb_deq;
+
+	if (event_p_id < 0)
+		return;
+
+	lcore_id = rte_lcore_id();
+
+	lconf = &lcore_conf[lcore_id];
+
+	RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);
+
+	while (!force_quit) {
+		/* Read events from RX queues */
+		nb_deq = rte_event_dequeue_burst(event_d_id, event_p_id,
+				events, deq_len, 0);
+		if (nb_deq == 0) {
+			rte_pause();
+			continue;
+		}
+
+		for (i = 0; i < nb_deq; i++) {
+			struct rte_mbuf *mbuf = events[i].mbuf;
+
+			mbuf->port = lpm_get_dst_port(lconf, mbuf, mbuf->port);
+
+#if defined RTE_ARCH_X86 || defined RTE_MACHINE_CPUFLAG_NEON \
+					|| defined RTE_ARCH_PPC_64
+			process_packet(mbuf, &mbuf->port);
+#else
+			struct rte_ether_hdr *eth_hdr = rte_pktmbuf_mtod(mbuf,
+						struct rte_ether_hdr *);
+
+#ifdef DO_RFC_1812_CHECKS
+			struct rte_ipv4_hdr *ipv4_hdr;
+			if (RTE_ETH_IS_IPV4_HDR(mbuf->packet_type)) {
+				/* Handle IPv4 headers.*/
+				ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf,
+						struct rte_ipv4_hdr *,
+						sizeof(struct rte_ether_hdr));
+
+				if (is_valid_ipv4_pkt(ipv4_hdr, mbuf->pkt_len)
+						< 0) {
+					mbuf->port = BAD_PORT;
+					continue;
+				}
+				/* Update time to live and header checksum */
+				--(ipv4_hdr->time_to_live);
+				++(ipv4_hdr->hdr_checksum);
+			}
+#endif
+			/* dst addr */
+			*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[
+								mbuf->port];
+			/* src addr */
+			rte_ether_addr_copy(&ports_eth_addr[mbuf->port],
+					&eth_hdr->s_addr);
+#endif
+			if (flags & L3FWD_EVENT_TX_ENQ) {
+				events[i].queue_id = tx_q_id;
+				events[i].op = RTE_EVENT_OP_FORWARD;
+			}
+
+			if (flags & L3FWD_EVENT_TX_DIRECT)
+				rte_event_eth_tx_adapter_txq_set(mbuf, 0);
+		}
+
+		if (flags & L3FWD_EVENT_TX_ENQ) {
+			nb_enq = rte_event_enqueue_burst(event_d_id, event_p_id,
+					events, nb_deq);
+			while (nb_enq < nb_deq && !force_quit)
+				nb_enq += rte_event_enqueue_burst(event_d_id,
+						event_p_id, events + nb_enq,
+						nb_deq - nb_enq);
+		}
+
+		if (flags & L3FWD_EVENT_TX_DIRECT) {
+			nb_enq = rte_event_eth_tx_adapter_enqueue(event_d_id,
+					event_p_id, events, nb_deq, 0);
+			while (nb_enq < nb_deq && !force_quit)
+				nb_enq += rte_event_eth_tx_adapter_enqueue(
+						event_d_id, event_p_id,
+						events + nb_enq,
+						nb_deq - nb_enq, 0);
+		}
+	}
+}
+
+static __rte_always_inline void
+lpm_event_loop(struct l3fwd_event_resources *evt_rsrc,
+		 const uint8_t flags)
+{
+	if (flags & L3FWD_EVENT_SINGLE)
+		lpm_event_loop_single(evt_rsrc, flags);
+	if (flags & L3FWD_EVENT_BURST)
+		lpm_event_loop_burst(evt_rsrc, flags);
+}
+
+int __rte_noinline
+lpm_event_main_loop_tx_d(__attribute__((unused)) void *dummy)
+{
+	struct l3fwd_event_resources *evt_rsrc =
+					l3fwd_get_eventdev_rsrc();
+
+	lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_DIRECT | L3FWD_EVENT_SINGLE);
+	return 0;
+}
+
+int __rte_noinline
+lpm_event_main_loop_tx_d_burst(__attribute__((unused)) void *dummy)
+{
+	struct l3fwd_event_resources *evt_rsrc =
+					l3fwd_get_eventdev_rsrc();
+
+	lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_DIRECT | L3FWD_EVENT_BURST);
+	return 0;
+}
+
+int __rte_noinline
+lpm_event_main_loop_tx_q(__attribute__((unused)) void *dummy)
+{
+	struct l3fwd_event_resources *evt_rsrc =
+					l3fwd_get_eventdev_rsrc();
+
+	lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_ENQ | L3FWD_EVENT_SINGLE);
+	return 0;
+}
+
+int __rte_noinline
+lpm_event_main_loop_tx_q_burst(__attribute__((unused)) void *dummy)
+{
+	struct l3fwd_event_resources *evt_rsrc =
+					l3fwd_get_eventdev_rsrc();
+
+	lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_ENQ | L3FWD_EVENT_BURST);
+	return 0;
+}
+
 void
 setup_lpm(const int socketid)
 {
diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c
index 69d212bc2..b88fd88db 100644
--- a/examples/l3fwd/main.c
+++ b/examples/l3fwd/main.c
@@ -951,13 +951,18 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "Invalid L3FWD parameters\n");
 
+	/* Setup function pointers for lookup method. */
+	setup_l3fwd_lookup_tables();
+
 	evt_rsrc->per_port_pool = per_port_pool;
 	evt_rsrc->pkt_pool = pktmbuf_pool;
 	evt_rsrc->port_mask = enabled_port_mask;
 	/* Configure eventdev parameters if user has requested */
 	l3fwd_event_resource_setup(&port_conf);
-	if (evt_rsrc->enabled)
+	if (evt_rsrc->enabled) {
+		l3fwd_lkp.main_loop = evt_rsrc->ops.lpm_event_loop;
 		goto skip_port_config;
+	}
 
 	if (check_lcore_params() < 0)
 		rte_exit(EXIT_FAILURE, "check_lcore_params failed\n");
@@ -973,9 +978,6 @@ main(int argc, char **argv)
 
 	nb_lcores = rte_lcore_count();
 
-	/* Setup function pointers for lookup method. */
-	setup_l3fwd_lookup_tables();
-
 	/* initialize all ports */
 	RTE_ETH_FOREACH_DEV(portid) {
 		struct rte_eth_conf local_port_conf = port_conf;
-- 
2.17.1