diff mbox series

[net-next,v2,2/2] eth: fbnic: add support for basic qstats

Message ID 20240808170915.2114410-3-kuba@kernel.org (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series eth: fbnic: add basic stats | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: kernel-team@meta.com
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 29 this patch: 29
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 85 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jakub Kicinski Aug. 8, 2024, 5:09 p.m. UTC 
From: Stanislav Fomichev <sdf@fomichev.me>

Implement netdev_stat_ops and export the basic per-queue stats.

This interface expect users to set the values that are used
either to zero or to some other preserved value (they are 0xff by
default). So here we export bytes/packets/drops from tx and rx_stats
plus set some of the values that are exposed by queue stats
to zero.

  $ cd tools/testing/selftests/drivers/net && ./stats.py
  [...]
  Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0

Reviewed-by: Joe Damato <jdamato@fastly.com>
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../net/ethernet/meta/fbnic/fbnic_netdev.c    | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c
index a048e4a617eb..571374361259 100644
--- a/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c
+++ b/drivers/net/ethernet/meta/fbnic/fbnic_netdev.c
@@ -4,6 +4,7 @@ 
 #include <linux/etherdevice.h>
 #include <linux/ipv6.h>
 #include <linux/types.h>
+#include <net/netdev_queues.h>
 
 #include "fbnic.h"
 #include "fbnic_netdev.h"
@@ -395,6 +396,71 @@  static const struct net_device_ops fbnic_netdev_ops = {
 	.ndo_get_stats64	= fbnic_get_stats64,
 };
 
+static void fbnic_get_queue_stats_rx(struct net_device *dev, int idx,
+				     struct netdev_queue_stats_rx *rx)
+{
+	struct fbnic_net *fbn = netdev_priv(dev);
+	struct fbnic_ring *rxr = fbn->rx[idx];
+	struct fbnic_queue_stats *stats;
+	unsigned int start;
+	u64 bytes, packets;
+
+	if (!rxr)
+		return;
+
+	stats = &rxr->stats;
+	do {
+		start = u64_stats_fetch_begin(&stats->syncp);
+		bytes = stats->bytes;
+		packets = stats->packets;
+	} while (u64_stats_fetch_retry(&stats->syncp, start));
+
+	rx->bytes = bytes;
+	rx->packets = packets;
+}
+
+static void fbnic_get_queue_stats_tx(struct net_device *dev, int idx,
+				     struct netdev_queue_stats_tx *tx)
+{
+	struct fbnic_net *fbn = netdev_priv(dev);
+	struct fbnic_ring *txr = fbn->tx[idx];
+	struct fbnic_queue_stats *stats;
+	unsigned int start;
+	u64 bytes, packets;
+
+	if (!txr)
+		return;
+
+	stats = &txr->stats;
+	do {
+		start = u64_stats_fetch_begin(&stats->syncp);
+		bytes = stats->bytes;
+		packets = stats->packets;
+	} while (u64_stats_fetch_retry(&stats->syncp, start));
+
+	tx->bytes = bytes;
+	tx->packets = packets;
+}
+
+static void fbnic_get_base_stats(struct net_device *dev,
+				 struct netdev_queue_stats_rx *rx,
+				 struct netdev_queue_stats_tx *tx)
+{
+	struct fbnic_net *fbn = netdev_priv(dev);
+
+	tx->bytes = fbn->tx_stats.bytes;
+	tx->packets = fbn->tx_stats.packets;
+
+	rx->bytes = fbn->rx_stats.bytes;
+	rx->packets = fbn->rx_stats.packets;
+}
+
+static const struct netdev_stat_ops fbnic_stat_ops = {
+	.get_queue_stats_rx	= fbnic_get_queue_stats_rx,
+	.get_queue_stats_tx	= fbnic_get_queue_stats_tx,
+	.get_base_stats		= fbnic_get_base_stats,
+};
+
 void fbnic_reset_queues(struct fbnic_net *fbn,
 			unsigned int tx, unsigned int rx)
 {
@@ -453,6 +519,7 @@  struct net_device *fbnic_netdev_alloc(struct fbnic_dev *fbd)
 	fbd->netdev = netdev;
 
 	netdev->netdev_ops = &fbnic_netdev_ops;
+	netdev->stat_ops = &fbnic_stat_ops;
 
 	fbn = netdev_priv(netdev);