diff mbox series

[net-next,4/9] eth: bnxt: snapshot driver stats

Message ID 20250226211003.2790916-5-kuba@kernel.org (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series eth: bnxt: maintain basic pkt/byte counters in SW | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
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: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
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: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 63 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 2 this patch: 2
netdev/source_inline success Was 0 now: 0

Commit Message

Jakub Kicinski Feb. 26, 2025, 9:09 p.m. UTC 
Subsequent commits will add datapath stats which need u64_stats
protection. Make current readers work on a snapshot, so it's
easier to extend this code without much duplication.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 31 +++++++++++++++--------
 1 file changed, 21 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 29515d6c6cdd..32a2fbc6615b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -13092,6 +13092,12 @@  static int bnxt_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	return -EOPNOTSUPP;
 }
 
+static void bnxt_drv_stat_snapshot(const struct bnxt_sw_stats *sw_stats,
+				   struct bnxt_sw_stats *snapshot)
+{
+	memcpy(snapshot, sw_stats, sizeof(*snapshot));
+}
+
 static void bnxt_get_ring_stats(struct bnxt *bp,
 				struct rtnl_link_stats64 *stats)
 {
@@ -13100,8 +13106,11 @@  static void bnxt_get_ring_stats(struct bnxt *bp,
 	for (i = 0; i < bp->cp_nr_rings; i++) {
 		struct bnxt_napi *bnapi = bp->bnapi[i];
 		struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
+		struct bnxt_sw_stats sw_stats;
 		u64 *sw = cpr->stats.sw_stats;
 
+		bnxt_drv_stat_snapshot(cpr->sw_stats, &sw_stats);
+
 		stats->rx_packets += BNXT_GET_RING_STATS64(sw, rx_ucast_pkts);
 		stats->rx_packets += BNXT_GET_RING_STATS64(sw, rx_mcast_pkts);
 		stats->rx_packets += BNXT_GET_RING_STATS64(sw, rx_bcast_pkts);
@@ -13126,8 +13135,8 @@  static void bnxt_get_ring_stats(struct bnxt *bp,
 		stats->tx_dropped += BNXT_GET_RING_STATS64(sw, tx_error_pkts);
 
 		stats->rx_dropped +=
-			cpr->sw_stats->rx.rx_netpoll_discards +
-			cpr->sw_stats->rx.rx_oom_discards;
+			sw_stats.rx.rx_netpoll_discards +
+			sw_stats.rx.rx_oom_discards;
 	}
 }
 
@@ -13194,20 +13203,22 @@  static void bnxt_get_one_ring_drv_stats(struct bnxt *bp,
 					struct bnxt_total_ring_drv_stats *stats,
 					struct bnxt_cp_ring_info *cpr)
 {
-	struct bnxt_sw_stats *sw_stats = cpr->sw_stats;
 	u64 *hw_stats = cpr->stats.sw_stats;
+	struct bnxt_sw_stats sw_stats;
 
-	stats->rx_total_l4_csum_errors += sw_stats->rx.rx_l4_csum_errors;
-	stats->rx_total_resets += sw_stats->rx.rx_resets;
-	stats->rx_total_buf_errors += sw_stats->rx.rx_buf_errors;
-	stats->rx_total_oom_discards += sw_stats->rx.rx_oom_discards;
-	stats->rx_total_netpoll_discards += sw_stats->rx.rx_netpoll_discards;
+	bnxt_drv_stat_snapshot(cpr->sw_stats, &sw_stats);
+
+	stats->rx_total_l4_csum_errors += sw_stats.rx.rx_l4_csum_errors;
+	stats->rx_total_resets += sw_stats.rx.rx_resets;
+	stats->rx_total_buf_errors += sw_stats.rx.rx_buf_errors;
+	stats->rx_total_oom_discards += sw_stats.rx.rx_oom_discards;
+	stats->rx_total_netpoll_discards += sw_stats.rx.rx_netpoll_discards;
 	stats->rx_total_ring_discards +=
 		BNXT_GET_RING_STATS64(hw_stats, rx_discard_pkts);
-	stats->tx_total_resets += sw_stats->tx.tx_resets;
+	stats->tx_total_resets += sw_stats.tx.tx_resets;
 	stats->tx_total_ring_discards +=
 		BNXT_GET_RING_STATS64(hw_stats, tx_discard_pkts);
-	stats->total_missed_irqs += sw_stats->cmn.missed_irqs;
+	stats->total_missed_irqs += sw_stats.cmn.missed_irqs;
 }
 
 void bnxt_get_ring_drv_stats(struct bnxt *bp,