[PATCH ath-next 6/8] wifi: ath12k: track per-ring RX sent-to-stack count

From: Hariharan Ramanathan <[email protected]>

The device DP stats provide visibility into RX errors and drops but
lack a counter for successfully delivered packets. Without this, it is
difficult to correlate REO ring activity with actual stack delivery
during debugging or performance analysis.

Add sent_to_stack[DP_REO_DST_RING_MAX] to ath12k_device_dp_stats to
track successful deliveries per REO ring. A per-device dimension is not
needed because partner_dp is already resolved at the increment point,
so the counter is incremented directly in partner_dp->device_stats,
attributing it to the correct device without an extra index.

Increment the counter just before each MSDU is handed off to the stack
via ath12k_dp_rx_deliver_msdu(). Add a likely()/WARN_ON_ONCE() bounds
check on ring_id before indexing sent_to_stack[], consistent with all
other new stat arrays in this series.

Expose the per-ring counts in the device_dp_stats debugfs file under a
new 'REO sent to stack' section.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6.r1-00402-QCAHKSWPL_SILICONZ-1

Signed-off-by: Hariharan Ramanathan <[email protected]>
Co-developed-by: Pardeep Kaur <[email protected]>
Signed-off-by: Pardeep Kaur <[email protected]>
---
 drivers/net/wireless/ath/ath12k/debugfs.c     | 5 +++++
 drivers/net/wireless/ath/ath12k/dp.h          | 1 +
 drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c | 5 ++++-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/debugfs.c b/drivers/net/wireless/ath/ath12k/debugfs.c
index 5020d9608535..9a8d07bfb848 100644
--- a/drivers/net/wireless/ath/ath12k/debugfs.c
+++ b/drivers/net/wireless/ath/ath12k/debugfs.c
@@ -1122,6 +1122,11 @@ static ssize_t ath12k_debugfs_dump_device_dp_stats(struct file *file,
 		len += scnprintf(buf + len, size - len, "%s: %u\n",
 				 wbm_rx_drop[i], device_stats->wbm_err.drop[i]);
 
+	len += scnprintf(buf + len, size - len, "\nREO sent to stack\n");
+	for (i = 0; i < DP_REO_DST_RING_MAX; i++)
+		len += scnprintf(buf + len, size - len, "ring%d: %u\n",
+				 i, device_stats->sent_to_stack[i]);
+
 	len += scnprintf(buf + len, size - len, "\nHAL REO errors:\n");
 
 	for (i = 0; i < DP_REO_DST_RING_MAX; i++)
diff --git a/drivers/net/wireless/ath/ath12k/dp.h b/drivers/net/wireless/ath/ath12k/dp.h
index 563aa24ea55a..298b65142a0e 100644
--- a/drivers/net/wireless/ath/ath12k/dp.h
+++ b/drivers/net/wireless/ath/ath12k/dp.h
@@ -457,6 +457,7 @@ struct ath12k_device_dp_stats {
 	u32 tx_enqueued[DP_TCL_NUM_RING_MAX];
 	u32 tx_completed[DP_TCL_NUM_RING_MAX];
 	u32 reo_excep_msdu_buf_type;
+	u32 sent_to_stack[DP_REO_DST_RING_MAX];
 };
 
 struct ath12k_dp {
diff --git a/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c b/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c
index b203513d63cc..33c4c89eefb5 100644
--- a/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c
+++ b/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c
@@ -651,7 +651,10 @@ ath12k_wifi7_dp_rx_process_received_packets(struct ath12k_dp *dp,
 			dev_kfree_skb_any(msdu);
 			continue;
 		}
-
+		if (likely(ring_id < DP_REO_DST_RING_MAX))
+			partner_dp->device_stats.sent_to_stack[ring_id]++;
+		else
+			WARN_ON_ONCE(1);
 		ath12k_dp_rx_deliver_msdu(dp_pdev, napi, msdu, &rx_info);
 	}
 
-- 
2.34.1