[PATCH ath-next v2 6/8] wifi: ath12k: track per-ring RX sent-to-stack count

[Pardeep Kaur <pardeep.kaur@oss.qualcomm.com>]

From: Hariharan Ramanathan <hariharan.ramanathan@oss.qualcomm.com>

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][ATH12K_MAX_DEVICES] to
ath12k_device_dp_stats to track successful deliveries per REO ring per
device. The counter is attributed to the ring owner's dp and indexed by
partner_dp->device_id, keeping it in the same debugfs file as reo_rx[]
for direct comparison in MLO configurations.

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 per-device 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 <hariharan.ramanathan@oss.qualcomm.com>
Co-developed-by: Pardeep Kaur <pardeep.kaur@oss.qualcomm.com>
Signed-off-by: Pardeep Kaur <pardeep.kaur@oss.qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/debugfs.c     | 10 ++++++++++
 drivers/net/wireless/ath/ath12k/dp.h          |  1 +
 drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c |  5 ++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/debugfs.c b/drivers/net/wireless/ath/ath12k/debugfs.c
index f9653fb7b038..216a1af22898 100644
--- a/drivers/net/wireless/ath/ath12k/debugfs.c
+++ b/drivers/net/wireless/ath/ath12k/debugfs.c
@@ -1122,6 +1122,16 @@ 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:", i);
+		for (j = 0; j < ab->ag->num_devices; j++)
+			len += scnprintf(buf + len, size - len,
+					 "\t%d:%u", j,
+					 device_stats->sent_to_stack[i][j]);
+		len += scnprintf(buf + len, size - len, "\n");
+	}
+
 	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 9b57b2170b60..5cfe2096c633 100644
--- a/drivers/net/wireless/ath/ath12k/dp.h
+++ b/drivers/net/wireless/ath/ath12k/dp.h
@@ -458,6 +458,7 @@ 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][ATH12K_MAX_DEVICES];
 };
 
 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..60489cfd4e54 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))
+			dp->device_stats.sent_to_stack[ring_id][partner_dp->device_id]++;
+		else
+			WARN_ON_ONCE(1);
 		ath12k_dp_rx_deliver_msdu(dp_pdev, napi, msdu, &rx_info);
 	}
 
-- 
2.34.1