Introduce common helper routines for keeping track of per-queue
statistics in SW PMD's. The code in several drivers had
copy/pasted the same code for this, but had common issues
with 64 bit counters on 32 bit platforms.
Signed-off-by: Stephen Hemminger
---
lib/ethdev/ethdev_swstats.c | 109 +++
lib/ethdev/ethdev_swstats.h | 124
lib/ethdev/meson.build | 2 +
lib/ethdev/version.map | 3 +
4 files changed, 238 insertions(+)
create mode 100644 lib/ethdev/ethdev_swstats.c
create mode 100644 lib/ethdev/ethdev_swstats.h
diff --git a/lib/ethdev/ethdev_swstats.c b/lib/ethdev/ethdev_swstats.c
new file mode 100644
index 00..7892b2180b
--- /dev/null
+++ b/lib/ethdev/ethdev_swstats.c
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) Stephen Hemminger
+ */
+
+
+#include
+#include
+#include
+
+#include "rte_ethdev.h"
+#include "ethdev_driver.h"
+#include "ethdev_swstats.h"
+
+int
+rte_eth_counters_stats_get(const struct rte_eth_dev *dev,
+ size_t tx_offset, size_t rx_offset,
+ struct rte_eth_stats *stats)
+{
+ uint64_t packets, bytes, errors;
+ unsigned int i;
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ const void *txq = dev->data->tx_queues[i];
+ const struct rte_eth_counters *counters;
+
+ if (txq == NULL)
+ continue;
+
+ counters = (const struct rte_eth_counters *)((const char *)txq
+ tx_offset);
+ packets = rte_counter64_fetch(&counters->packets);
+ bytes = rte_counter64_fetch(&counters->bytes);
+ errors = rte_counter64_fetch(&counters->errors);
+
+ /*
+* Prevent compiler from fetching values twice which would
+* cause per-queue and global statistics to not match.
+*/
+ rte_compiler_barrier();
+
+ stats->opackets += packets;
+ stats->obytes += bytes;
+ stats->oerrors += errors;
+
+ if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+ stats->q_opackets[i] = packets;
+ stats->q_obytes[i] = bytes;
+ }
+ }
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ const void *rxq = dev->data->rx_queues[i];
+ const struct rte_eth_counters *counters;
+
+ if (rxq == NULL)
+ continue;
+
+ counters = (const struct rte_eth_counters *)((const char *)rxq
+ rx_offset);
+ packets = rte_counter64_fetch(&counters->packets);
+ bytes = rte_counter64_fetch(&counters->bytes);
+ errors = rte_counter64_fetch(&counters->errors);
+
+ rte_compiler_barrier();
+
+ stats->ipackets += packets;
+ stats->ibytes += bytes;
+ stats->ierrors += errors;
+
+ if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+ stats->q_ipackets[i] = packets;
+ stats->q_ibytes[i] = bytes;
+ }
+ }
+
+ stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
+ return 0;
+}
+
+int
+rte_eth_counters_reset(struct rte_eth_dev *dev, size_t tx_offset, size_t
rx_offset)
+{
+ struct rte_eth_counters *counters;
+ unsigned int i;
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ void *txq = dev->data->tx_queues[i];
+
+ if (txq == NULL)
+ continue;
+
+ counters = (struct rte_eth_counters *)((char *)txq + tx_offset);
+ rte_counter64_reset(&counters->packets);
+ rte_counter64_reset(&counters->bytes);
+ rte_counter64_reset(&counters->errors);
+ }
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ void *rxq = dev->data->rx_queues[i];
+
+ if (rxq == NULL)
+ continue;
+
+ counters = (struct rte_eth_counters *)((char *)rxq + rx_offset);
+ rte_counter64_reset(&counters->packets);
+ rte_counter64_reset(&counters->bytes);
+ rte_counter64_reset(&counters->errors);
+ }
+
+ return 0;
+}
diff --git a/lib/ethdev/ethdev_swstats.h b/lib/ethdev/ethdev_swstats.h
new file mode 100644
index 00..808c540640
--- /dev/null
+++ b/lib/ethdev/ethdev_swstats.h
@@ -0,0 +1,124 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) Stephen Hemminger
+ */
+
+#ifndef _RTE_ETHDEV_SWSTATS_H_
+#define _RTE_ETHDEV_SWSTATS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @file
+ *
+ * Internal statistics counters for software based devices.
+ * Hardware PMD's should use the hardware counters instead.
+ *
+ * This provides a library for PMD's to keep track of packets and bytes.
+ * It is assum
