diff mbox series

[net-next,1/2] net/sched: taprio: report class offload stats per TXQ, not per TC

Message ID 20230609135917.1084327-2-vladimir.oltean@nxp.com (mailing list archive)
State Accepted
Commit 2b84960fc5dd38a19241388fb33f20936cb217e2
Delegated to: Netdev Maintainers
Headers show
Series Fixes for taprio xstats | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
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: 76 this patch: 76
netdev/cc_maintainers warning 1 maintainers not CCed: claudiu.manoil@nxp.com
netdev/build_clang success Errors and warnings before: 12 this patch: 12
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 Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 93 this patch: 93
netdev/checkpatch warning WARNING: line length of 84 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Vladimir Oltean June 9, 2023, 1:59 p.m. UTC 
The taprio Qdisc creates child classes per netdev TX queue, but
taprio_dump_class_stats() currently reports offload statistics per
traffic class. Traffic classes are groups of TXQs sharing the same
dequeue priority, so this is incorrect and we shouldn't be bundling up
the TXQ stats when reporting them, as we currently do in enetc.

Modify the API from taprio to drivers such that they report TXQ offload
stats and not TC offload stats.

There is no change in the UAPI or in the global Qdisc stats.

Fixes: 6c1adb650c8d ("net/sched: taprio: add netlink reporting for offload statistics counters")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 .../net/ethernet/freescale/enetc/enetc_qos.c  | 20 +++++++------------
 include/net/pkt_sched.h                       | 10 +++++-----
 net/sched/sch_taprio.c                        |  8 ++++----
 3 files changed, 16 insertions(+), 22 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_qos.c b/drivers/net/ethernet/freescale/enetc/enetc_qos.c
index 71157eba1fbe..58cdd67bb573 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_qos.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_qos.c
@@ -160,20 +160,14 @@  static void enetc_taprio_stats(struct net_device *ndev,
 	stats->window_drops = window_drops;
 }
 
-static void enetc_taprio_tc_stats(struct net_device *ndev,
-				  struct tc_taprio_qopt_tc_stats *tc_stats)
+static void enetc_taprio_queue_stats(struct net_device *ndev,
+				     struct tc_taprio_qopt_queue_stats *queue_stats)
 {
-	struct tc_taprio_qopt_stats *stats = &tc_stats->stats;
+	struct tc_taprio_qopt_stats *stats = &queue_stats->stats;
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
-	int tc = tc_stats->tc;
-	u64 window_drops = 0;
-	int i;
+	int queue = queue_stats->queue;
 
-	for (i = 0; i < priv->num_tx_rings; i++)
-		if (priv->tx_ring[i]->prio == tc)
-			window_drops += priv->tx_ring[i]->stats.win_drop;
-
-	stats->window_drops = window_drops;
+	stats->window_drops = priv->tx_ring[queue]->stats.win_drop;
 }
 
 static int enetc_taprio_replace(struct net_device *ndev,
@@ -208,8 +202,8 @@  int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data)
 	case TAPRIO_CMD_STATS:
 		enetc_taprio_stats(ndev, &offload->stats);
 		break;
-	case TAPRIO_CMD_TC_STATS:
-		enetc_taprio_tc_stats(ndev, &offload->tc_stats);
+	case TAPRIO_CMD_QUEUE_STATS:
+		enetc_taprio_queue_stats(ndev, &offload->queue_stats);
 		break;
 	default:
 		err = -EOPNOTSUPP;
diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 518febb91c9f..e98aac9d5ad5 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -191,7 +191,7 @@  enum tc_taprio_qopt_cmd {
 	TAPRIO_CMD_REPLACE,
 	TAPRIO_CMD_DESTROY,
 	TAPRIO_CMD_STATS,
-	TAPRIO_CMD_TC_STATS,
+	TAPRIO_CMD_QUEUE_STATS,
 };
 
 /**
@@ -208,8 +208,8 @@  struct tc_taprio_qopt_stats {
 	u64 tx_overruns;
 };
 
-struct tc_taprio_qopt_tc_stats {
-	int tc;
+struct tc_taprio_qopt_queue_stats {
+	int queue;
 	struct tc_taprio_qopt_stats stats;
 };
 
@@ -227,8 +227,8 @@  struct tc_taprio_qopt_offload {
 	union {
 		/* TAPRIO_CMD_STATS */
 		struct tc_taprio_qopt_stats stats;
-		/* TAPRIO_CMD_TC_STATS */
-		struct tc_taprio_qopt_tc_stats tc_stats;
+		/* TAPRIO_CMD_QUEUE_STATS */
+		struct tc_taprio_qopt_queue_stats queue_stats;
 		/* TAPRIO_CMD_REPLACE */
 		struct {
 			struct tc_mqprio_qopt_offload mqprio;
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index 5076da103f63..20d2702f862e 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -2457,9 +2457,9 @@  static int taprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
 {
 	struct netdev_queue *dev_queue = taprio_queue_get(sch, cl);
 	struct tc_taprio_qopt_offload offload = {
-		.cmd = TAPRIO_CMD_TC_STATS,
-		.tc_stats = {
-			.tc = cl - 1,
+		.cmd = TAPRIO_CMD_QUEUE_STATS,
+		.queue_stats = {
+			.queue = cl - 1,
 		},
 	};
 	struct Qdisc *child;
@@ -2469,7 +2469,7 @@  static int taprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
 	    qdisc_qstats_copy(d, child) < 0)
 		return -1;
 
-	return taprio_dump_xstats(sch, d, &offload, &offload.tc_stats.stats);
+	return taprio_dump_xstats(sch, d, &offload, &offload.queue_stats.stats);
 }
 
 static void taprio_walk(struct Qdisc *sch, struct qdisc_walker *arg)