From 722d1f47d8baebca0daed75d732d0c5ab0786352 Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sun, 19 Apr 2020 22:11:41 +0200
Subject: [PATCH] mt76: add rx queues info to mt76 debugfs

Introduce rx-queues debugfs node in order to dump rx queues status.
This would be useful for mcu fw debugging

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 debugfs.c         | 21 +++++++++++++++++++++
 mt7603/debugfs.c  |  2 +-
 mt7615/debugfs.c  |  4 ++--
 mt76x02_debugfs.c |  2 +-
 4 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/debugfs.c b/debugfs.c
index 560062b3..862a3dd0 100644
--- a/debugfs.c
+++ b/debugfs.c
@@ -46,6 +46,25 @@ int mt76_queues_read(struct seq_file *s, void *data)
 }
 EXPORT_SYMBOL_GPL(mt76_queues_read);
 
+static int mt76_rx_queues_read(struct seq_file *s, void *data)
+{
+	struct mt76_dev *dev = dev_get_drvdata(s->private);
+	int i, queued;
+
+	for (i = 0; i < ARRAY_SIZE(dev->q_rx); i++) {
+		struct mt76_queue *q = &dev->q_rx[i];
+
+		if (!q->ndesc)
+			continue;
+
+		queued = mt76_is_usb(dev) ? q->ndesc - q->queued : q->queued;
+		seq_printf(s, "%d:	queued=%d head=%d tail=%d\n",
+			   i, queued, q->head, q->tail);
+	}
+
+	return 0;
+}
+
 void mt76_seq_puts_array(struct seq_file *file, const char *str,
 			 s8 *val, int len)
 {
@@ -93,6 +112,8 @@ struct dentry *mt76_register_debugfs(struct mt76_dev *dev)
 		debugfs_create_blob("otp", 0400, dir, &dev->otp);
 	debugfs_create_devm_seqfile(dev->dev, "rate_txpower", dir,
 				    mt76_read_rate_txpower);
+	debugfs_create_devm_seqfile(dev->dev, "rx-queues", dir,
+				    mt76_rx_queues_read);
 
 	return dir;
 }
diff --git a/mt7603/debugfs.c b/mt7603/debugfs.c
index e32d5118..e21fd96a 100644
--- a/mt7603/debugfs.c
+++ b/mt7603/debugfs.c
@@ -113,7 +113,7 @@ void mt7603_init_debugfs(struct mt7603_dev *dev)
 		return;
 
 	debugfs_create_file("ampdu_stat", 0400, dir, dev, &fops_ampdu_stat);
-	debugfs_create_devm_seqfile(dev->mt76.dev, "queues", dir,
+	debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", dir,
 				    mt76_queues_read);
 	debugfs_create_file("edcca", 0600, dir, dev, &fops_edcca);
 	debugfs_create_u32("reset_test", 0600, dir, &dev->reset_test);
diff --git a/mt7615/debugfs.c b/mt7615/debugfs.c
index 15003648..fd3ef483 100644
--- a/mt7615/debugfs.c
+++ b/mt7615/debugfs.c
@@ -293,10 +293,10 @@ int mt7615_init_debugfs(struct mt7615_dev *dev)
 		return -ENOMEM;
 
 	if (is_mt7615(&dev->mt76))
-		debugfs_create_devm_seqfile(dev->mt76.dev, "queues", dir,
+		debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", dir,
 					    mt7615_queues_read);
 	else
-		debugfs_create_devm_seqfile(dev->mt76.dev, "queues", dir,
+		debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", dir,
 					    mt76_queues_read);
 	debugfs_create_devm_seqfile(dev->mt76.dev, "acq", dir,
 				    mt7615_queues_acq);
diff --git a/mt76x02_debugfs.c b/mt76x02_debugfs.c
index 68b40d63..ff448a1a 100644
--- a/mt76x02_debugfs.c
+++ b/mt76x02_debugfs.c
@@ -144,7 +144,7 @@ void mt76x02_init_debugfs(struct mt76x02_dev *dev)
 	if (!dir)
 		return;
 
-	debugfs_create_devm_seqfile(dev->mt76.dev, "queues", dir,
+	debugfs_create_devm_seqfile(dev->mt76.dev, "xmit-queues", dir,
 				    mt76_queues_read);
 	debugfs_create_u8("temperature", 0400, dir, &dev->cal.temp);
 	debugfs_create_bool("tpc", 0600, dir, &dev->enable_tpc);