[RFC v2 08/11] net/enic: do not use deprecated rte_atomic64

[Stephen Hemminger <stephen@networkplumber.org>]

The rte_atomic64 datatype and functions are deprecated.
This driver was only using it for error statistics where atomic
is not necessary. The DPDK PMD model is that statistics do
not have to be exact in face of contention.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/enic/enic.h               |  6 +++---
 drivers/net/enic/enic_compat.h        |  1 -
 drivers/net/enic/enic_main.c          | 17 +++++++----------
 drivers/net/enic/enic_rxtx.c          | 14 ++++++--------
 drivers/net/enic/enic_rxtx_vec_avx2.c |  4 ++--
 5 files changed, 18 insertions(+), 24 deletions(-)

diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index 87f6b35fcd..0a8d4a29ca 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -59,9 +59,9 @@
 #define ENICPMD_RXQ_INTR_OFFSET 1
 
 struct enic_soft_stats {
-	rte_atomic64_t rx_nombuf;
-	rte_atomic64_t rx_packet_errors;
-	rte_atomic64_t tx_oversized;
+	uint64_t rx_nombuf;
+	uint64_t rx_packet_errors;
+	uint64_t tx_oversized;
 };
 
 struct enic_memzone_entry {
diff --git a/drivers/net/enic/enic_compat.h b/drivers/net/enic/enic_compat.h
index 7cff6831b9..3ce4299e81 100644
--- a/drivers/net/enic/enic_compat.h
+++ b/drivers/net/enic/enic_compat.h
@@ -9,7 +9,6 @@
 #include <stdio.h>
 #include <unistd.h>
 
-#include <rte_atomic.h>
 #include <rte_malloc.h>
 #include <rte_log.h>
 #include <rte_io.h>
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 2696fa77d4..fb9a5754c9 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -83,17 +83,15 @@ static void enic_log_q_error(struct enic *enic)
 static void enic_clear_soft_stats(struct enic *enic)
 {
 	struct enic_soft_stats *soft_stats = &enic->soft_stats;
-	rte_atomic64_clear(&soft_stats->rx_nombuf);
-	rte_atomic64_clear(&soft_stats->rx_packet_errors);
-	rte_atomic64_clear(&soft_stats->tx_oversized);
+
+	memset(soft_stats, 0, sizeof(*soft_stats));
 }
 
 static void enic_init_soft_stats(struct enic *enic)
 {
 	struct enic_soft_stats *soft_stats = &enic->soft_stats;
-	rte_atomic64_init(&soft_stats->rx_nombuf);
-	rte_atomic64_init(&soft_stats->rx_packet_errors);
-	rte_atomic64_init(&soft_stats->tx_oversized);
+
+	memset(soft_stats, 0, sizeof(*soft_stats));
 	enic_clear_soft_stats(enic);
 }
 
@@ -132,7 +130,7 @@ int enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats,
 	 * counted in ibytes even though truncated packets are dropped
 	 * which can make ibytes be slightly higher than it should be.
 	 */
-	rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
+	rx_packet_errors = soft_stats->rx_packet_errors;
 	rx_truncated = rx_packet_errors - stats->rx.rx_errors;
 
 	r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
@@ -142,12 +140,11 @@ int enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats,
 	r_stats->obytes = stats->tx.tx_bytes_ok;
 
 	r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
-	r_stats->oerrors = stats->tx.tx_errors
-			   + rte_atomic64_read(&soft_stats->tx_oversized);
+	r_stats->oerrors = stats->tx.tx_errors + soft_stats->tx_oversized;
 
 	r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
 
-	r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
+	r_stats->rx_nombuf = soft_stats->rx_nombuf;
 	return 0;
 }
 
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 549a153332..c87d947b93 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -112,7 +112,7 @@ enic_recv_pkts_common(void *rx_queue, struct rte_mbuf **rx_pkts,
 		/* allocate a new mbuf */
 		nmb = rte_mbuf_raw_alloc(rq->mp);
 		if (nmb == NULL) {
-			rte_atomic64_inc(&enic->soft_stats.rx_nombuf);
+			++enic->soft_stats.rx_nombuf;
 			break;
 		}
 
@@ -185,7 +185,7 @@ enic_recv_pkts_common(void *rx_queue, struct rte_mbuf **rx_pkts,
 		}
 		if (unlikely(packet_error)) {
 			rte_pktmbuf_free(first_seg);
-			rte_atomic64_inc(&enic->soft_stats.rx_packet_errors);
+			++enic->soft_stats.rx_packet_errors;
 			continue;
 		}
 
@@ -303,7 +303,7 @@ enic_noscatter_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 		if (unlikely(cqd->bytes_written_flags &
 			     CQ_ENET_RQ_DESC_FLAGS_TRUNCATED)) {
 			rte_pktmbuf_free(*rxmb++);
-			rte_atomic64_inc(&enic->soft_stats.rx_packet_errors);
+			++enic->soft_stats.rx_packet_errors;
 			cqd++;
 			continue;
 		}
@@ -505,14 +505,12 @@ uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 	uint8_t offload_mode;
 	uint16_t header_len;
 	uint64_t tso;
-	rte_atomic64_t *tx_oversized;
 
 	enic_cleanup_wq(enic, wq);
 	wq_desc_avail = vnic_wq_desc_avail(wq);
 	head_idx = wq->head_idx;
 	desc_count = wq->ring.desc_count;
 	ol_flags_mask = RTE_MBUF_F_TX_VLAN | RTE_MBUF_F_TX_IP_CKSUM | RTE_MBUF_F_TX_L4_MASK;
-	tx_oversized = &enic->soft_stats.tx_oversized;
 
 	nb_pkts = RTE_MIN(nb_pkts, ENIC_TX_XMIT_MAX);
 
@@ -527,7 +525,7 @@ uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		/* drop packet if it's too big to send */
 		if (unlikely(!tso && pkt_len > ENIC_TX_MAX_PKT_SIZE)) {
 			rte_pktmbuf_free(tx_pkt);
-			rte_atomic64_inc(tx_oversized);
+			++enic->soft_stats.tx_oversized;
 			continue;
 		}
 
@@ -558,7 +556,7 @@ uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			if (unlikely(header_len == 0 || ((tx_pkt->tso_segsz +
 			    header_len) > ENIC_TX_MAX_PKT_SIZE))) {
 				rte_pktmbuf_free(tx_pkt);
-				rte_atomic64_inc(tx_oversized);
+				++enic->soft_stats.tx_oversized;
 				continue;
 			}
 
@@ -681,7 +679,7 @@ static void enqueue_simple_pkts(struct rte_mbuf **pkts,
 		 */
 		if (unlikely(p->pkt_len > ENIC_TX_MAX_PKT_SIZE)) {
 			desc->length = ENIC_TX_MAX_PKT_SIZE;
-			rte_atomic64_inc(&enic->soft_stats.tx_oversized);
+			++enic->soft_stats.tx_oversized;
 		}
 		desc++;
 	}
diff --git a/drivers/net/enic/enic_rxtx_vec_avx2.c b/drivers/net/enic/enic_rxtx_vec_avx2.c
index 600efff270..53589ab788 100644
--- a/drivers/net/enic/enic_rxtx_vec_avx2.c
+++ b/drivers/net/enic/enic_rxtx_vec_avx2.c
@@ -81,7 +81,7 @@ enic_noscatter_vec_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 		if (unlikely(cqd->bytes_written_flags &
 			     CQ_ENET_RQ_DESC_FLAGS_TRUNCATED)) {
 			rte_pktmbuf_free(*rxmb++);
-			rte_atomic64_inc(&enic->soft_stats.rx_packet_errors);
+			++enic->soft_stats.rx_packet_errors;
 		} else {
 			*rx++ = rx_one(cqd, *rxmb++, enic);
 		}
@@ -761,7 +761,7 @@ enic_noscatter_vec_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 		if (unlikely(cqd->bytes_written_flags &
 			     CQ_ENET_RQ_DESC_FLAGS_TRUNCATED)) {
 			rte_pktmbuf_free(*rxmb++);
-			rte_atomic64_inc(&enic->soft_stats.rx_packet_errors);
+			++enic->soft_stats.rx_packet_errors;
 		} else {
 			*rx++ = rx_one(cqd, *rxmb++, enic);
 		}
-- 
2.53.0