From 25990ed3816e0d47f56b5430bb9415d631e313a7 Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Fri, 13 Sep 2019 09:05:51 +0200
Subject: [PATCH] mt76: mt7615: add queue entry in debugfs
Git-commit: 25990ed3816e0d47f56b5430bb9415d631e313a7
Patch-mainline: v5.5-rc1
References: jsc#SLE-13430

Introduce mt7615_queues_read routine to dump hw queue related info.
Add hw ac queues statistics in mt7615 debugfs

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 .../net/wireless/mediatek/mt76/mt7615/debugfs.c    | 61 ++++++++++++++++++++++
 drivers/net/wireless/mediatek/mt76/mt7615/regs.h   | 11 ++++
 2 files changed, 72 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
index 2428a4659a1c..1dc68d4aee57 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
@@ -61,6 +61,63 @@ static int mt7615_read_temperature(struct seq_file *s, void *data)
 	return 0;
 }
 
+static int
+mt7615_queues_acq(struct seq_file *s, void *data)
+{
+	struct mt7615_dev *dev = dev_get_drvdata(s->private);
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		int j, acs = i / 4, index = i % 4;
+		u32 ctrl, val, qlen = 0;
+
+		val = mt76_rr(dev, MT_PLE_AC_QEMPTY(acs, index));
+		ctrl = BIT(31) | BIT(15) | (acs << 8);
+
+		for (j = 0; j < 32; j++) {
+			if (val & BIT(j))
+				continue;
+
+			mt76_wr(dev, MT_PLE_FL_Q0_CTRL,
+				ctrl | (j + (index << 5)));
+			qlen += mt76_get_field(dev, MT_PLE_FL_Q3_CTRL,
+					       GENMASK(11, 0));
+		}
+		seq_printf(s, "AC%d%d: queued=%d\n", acs, index, qlen);
+	}
+
+	return 0;
+}
+
+static int
+mt7615_queues_read(struct seq_file *s, void *data)
+{
+	struct mt7615_dev *dev = dev_get_drvdata(s->private);
+	static const struct {
+		char *queue;
+		int id;
+	} queue_map[] = {
+		{ "PDMA0", MT_TXQ_BE },
+		{ "MCUQ", MT_TXQ_MCU },
+		{ "MCUFWQ", MT_TXQ_FWDL },
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(queue_map); i++) {
+		struct mt76_sw_queue *q = &dev->mt76.q_tx[queue_map[i].id];
+
+		if (!q->q)
+			continue;
+
+		seq_printf(s,
+			   "%s:	queued=%d head=%d tail=%d\n",
+			   queue_map[i].queue, q->q->queued, q->q->head,
+			   q->q->tail);
+	}
+
+	return 0;
+}
+
 int mt7615_init_debugfs(struct mt7615_dev *dev)
 {
 	struct dentry *dir;
@@ -69,6 +126,10 @@ int mt7615_init_debugfs(struct mt7615_dev *dev)
 	if (!dir)
 		return -ENOMEM;
 
+	debugfs_create_devm_seqfile(dev->mt76.dev, "queues", dir,
+				    mt7615_queues_read);
+	debugfs_create_devm_seqfile(dev->mt76.dev, "acq", dir,
+				    mt7615_queues_acq);
 	debugfs_create_file("scs", 0600, dir, dev, &fops_scs);
 	debugfs_create_devm_seqfile(dev->mt76.dev, "radio", dir,
 				    mt7615_radio_read);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/regs.h b/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
index 8ecefcb19354..43676736a807 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
@@ -65,6 +65,17 @@
 #define MT_WPDMA_ABT_CFG		MT_HIF(0x530)
 #define MT_WPDMA_ABT_CFG1		MT_HIF(0x534)
 
+#define MT_PLE_BASE			0x8000
+#define MT_PLE(ofs)			(MT_PLE_BASE + (ofs))
+
+#define MT_PLE_FL_Q0_CTRL		MT_PLE(0x1b0)
+#define MT_PLE_FL_Q1_CTRL		MT_PLE(0x1b4)
+#define MT_PLE_FL_Q2_CTRL		MT_PLE(0x1b8)
+#define MT_PLE_FL_Q3_CTRL		MT_PLE(0x1bc)
+
+#define MT_PLE_AC_QEMPTY(ac, n)		MT_PLE(0x300 + 0x10 * (ac) + \
+					       ((n) << 2))
+
 #define MT_WF_PHY_BASE			0x10000
 #define MT_WF_PHY(ofs)			(MT_WF_PHY_BASE + (ofs))
 
-- 
2.16.4