[RFC 22/32] event/octeontx: replace deprecated SMP barriers

[Stephen Hemminger]

The worker barriers order event payload writes in normal memory
before the add work or tag switch store to the SSO device, so they
are IO ordering: use rte_io_wmb(). The selftest barriers publish
worker parameters before launching lcores; convert them to release
fences.

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 drivers/event/octeontx/ssovf_evdev_selftest.c | 6 +++---
 drivers/event/octeontx/ssovf_worker.c         | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/event/octeontx/ssovf_evdev_selftest.c b/drivers/event/octeontx/ssovf_evdev_selftest.c
index b54ae126d2..614f9bbaef 100644
--- a/drivers/event/octeontx/ssovf_evdev_selftest.c
+++ b/drivers/event/octeontx/ssovf_evdev_selftest.c
@@ -65,7 +65,7 @@ seqn_list_update(int val)
 		return -1;
 
 	seqn_list[seqn_list_index++] = val;
-	rte_smp_wmb();
+	rte_atomic_thread_fence(rte_memory_order_release);
 	return 0;
 }
 
@@ -637,7 +637,7 @@ launch_workers_and_wait(int (*main_worker)(void *),
 	param[0].sched_type = sched_type;
 	param[0].port = 0;
 	param[0].dequeue_tmo_ticks = dequeue_tmo_ticks;
-	rte_smp_wmb();
+	rte_atomic_thread_fence(rte_memory_order_release);
 
 	w_lcore = rte_get_next_lcore(
 			/* start core */ -1,
@@ -650,7 +650,7 @@ launch_workers_and_wait(int (*main_worker)(void *),
 		param[port].sched_type = sched_type;
 		param[port].port = port;
 		param[port].dequeue_tmo_ticks = dequeue_tmo_ticks;
-		rte_smp_wmb();
+		rte_atomic_thread_fence(rte_memory_order_release);
 		w_lcore = rte_get_next_lcore(w_lcore, 1, 0);
 		rte_eal_remote_launch(worker, &param[port], w_lcore);
 	}
diff --git a/drivers/event/octeontx/ssovf_worker.c b/drivers/event/octeontx/ssovf_worker.c
index 89b5dc056c..f3c6a0da5c 100644
--- a/drivers/event/octeontx/ssovf_worker.c
+++ b/drivers/event/octeontx/ssovf_worker.c
@@ -59,10 +59,10 @@ ssows_fwd_group(struct ssows *ws, const struct rte_event *ev, const uint8_t grp)
 		newtag |= grp << 20;
 		newtag |= tag;
 		ssows_swtag_norm(ws, newtag, SSO_SYNC_ATOMIC);
-		rte_smp_wmb();
+		rte_io_wmb();
 		ssows_swtag_wait(ws);
 	} else {
-		rte_smp_wmb();
+		rte_io_wmb();
 	}
 	ssows_add_work(ws, event_ptr, tag, new_tt, grp);
 }
@@ -158,7 +158,7 @@ ssows_enq_burst(void *port, const struct rte_event ev[], uint16_t nb_events)
 
 	switch (ev->op) {
 	case RTE_EVENT_OP_NEW:
-		rte_smp_wmb();
+		rte_io_wmb();
 		ssows_new_event(ws, ev);
 		break;
 	case RTE_EVENT_OP_FORWARD:
@@ -179,7 +179,7 @@ ssows_enq_new_burst(void *port, const struct rte_event ev[], uint16_t nb_events)
 	uint16_t i;
 	struct ssows *ws = port;
 
-	rte_smp_wmb();
+	rte_io_wmb();
 	for (i = 0; i < nb_events; i++)
 		ssows_new_event(ws,  &ev[i]);
 
-- 
2.53.0