recipes-wifi/linux-mt76/files/patches-3.x/0173-mtk-mt76-mt7996-add-debugfs-knob-to-set-and-dump-txo.patch

From 89d2a4f1f7f085d5abed6adba0cea27380ffa2c0 Mon Sep 17 00:00:00 2001
From: Peter Chiu <chui-hao.chiu@mediatek.com>
Date: Wed, 17 Jul 2024 16:57:24 +0800
Subject: [PATCH 173/193] mtk: mt76: mt7996: add debugfs knob to set and dump
 txop

Change-Id: Iaf4fa82556c9ee4433de29f1ebe125e91c743284
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
---
 mt7996/mtk_debug_i.h   |   8 ++++
 mt7996/mtk_debugfs_i.c | 104 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 112 insertions(+)

diff --git a/mt7996/mtk_debug_i.h b/mt7996/mtk_debug_i.h
index cec8d57..01023e1 100644
--- a/mt7996/mtk_debug_i.h
+++ b/mt7996/mtk_debug_i.h
@@ -1006,6 +1006,14 @@
 /* AGG */
 #define MT_AGG_REMAP_CTRL(_band)	MT_WF_AGG(_band, 0x094)
 #define MT_AGG_REMAP_CTRL_OM_REMAP	GENMASK(5, 0)
+
+/* TMAC */
+#define MT_WF_TMAC_WMM0_OFFSET		0x0c4
+#define MT_WF_TMAC_WMM1_OFFSET		0x364
+#define MT_WF_TMAC_WMM2_OFFSET		0x36c
+#define MT_WF_TMAC_WMM3_OFFSET		0x374
+#define MT_WF_TMAC_WMM_TXOP_MASK	GENMASK(31, 16)
+#define MT_WF_TMAC_WMM_TXOP_SHIFT	16
 #endif
 
 #endif
diff --git a/mt7996/mtk_debugfs_i.c b/mt7996/mtk_debugfs_i.c
index 852d1b1..c9224ee 100644
--- a/mt7996/mtk_debugfs_i.c
+++ b/mt7996/mtk_debugfs_i.c
@@ -824,6 +824,109 @@ static const struct file_operations fops_mlo_agc_tx = {
 	.llseek = default_llseek,
 };
 
+static ssize_t mt7996_be_txop_set(struct file *file,
+			       const char __user *user_buf,
+			       size_t count, loff_t *ppos)
+{
+	struct mt7996_dev *dev = file->private_data;
+	char buf[100], role[4];
+	u32 ofs;
+	u16 txop, decimal;
+	int i = 0;
+
+	if (count >= sizeof(buf))
+		return -EINVAL;
+
+	if (copy_from_user(buf, user_buf, count))
+		return -EFAULT;
+
+	if (count && buf[count - 1] == '\n')
+		buf[count - 1] = '\0';
+	else
+		buf[count] = '\0';
+
+	if (sscanf(buf, "%3s %hu.%hu", role, &txop, &decimal) != 3)
+		goto err;
+
+	if (!strncmp(role, "ap", 2))
+		ofs = MT_WF_TMAC_WMM0_OFFSET;
+	else if (!strncmp(role, "sta", 3))
+		ofs = MT_WF_TMAC_WMM3_OFFSET;
+	else
+		goto err;
+
+	/* Change unit to 32 us */
+	txop = (txop * 1000 + decimal * 100 + 16) >> 5;
+
+	for (i = 0; i < __MT_MAX_BAND; i++) {
+		if (!dev->mt76.phys[i])
+			continue;
+
+		mt76_rmw(dev, MT_WF_TMAC(i, ofs), MT_WF_TMAC_WMM_TXOP_MASK,
+			 txop << MT_WF_TMAC_WMM_TXOP_SHIFT);
+	}
+
+	return count;
+err:
+	dev_warn(dev->mt76.dev,
+		 "format: [ap|sta] [tx_queue_data2_burst]\n");
+	return -EINVAL;
+}
+
+static ssize_t mt7996_be_txop_dump(struct file *file, char __user *user_buf,
+				size_t count, loff_t *ppos)
+{
+	struct mt7996_dev *dev = file->private_data;
+	static const size_t size = 2048;
+	int len = 0, i, ret;
+	char *buf;
+	enum {
+		AP,
+		STA,
+		MAX_IF_TYPE,
+	};
+
+	buf = kzalloc(size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	len += scnprintf(buf + len, size - len, "Band\tAP (WMM0)\t\tSTA (WMM3)\n");
+
+	for (i = 0; i < __MT_MAX_BAND; i++) {
+		u32 txop[MAX_IF_TYPE], tx_burst[MAX_IF_TYPE];
+
+		if (!dev->mt76.phys[i])
+			continue;
+
+#define MT7996_READ_TXOP(role, base)						\
+do {										\
+	txop[role] = mt76_rr(dev, MT_WF_TMAC(i, base));				\
+	tx_burst[role] = u32_get_bits(txop[role], MT_WF_TMAC_WMM_TXOP_MASK);	\
+	tx_burst[role] = tx_burst[role] ? ((tx_burst[role] << 5) - 16) / 100 : 0;\
+} while (0)
+		MT7996_READ_TXOP(AP, MT_WF_TMAC_WMM0_OFFSET);
+		MT7996_READ_TXOP(STA, MT_WF_TMAC_WMM3_OFFSET);
+#undef MT7996_READ_TXOP
+
+		len += scnprintf(buf + len, size - len,
+			"%d\t0x%08x (%1u.%1u) \t0x%08x (%1u.%1u)\n", i,
+			txop[AP], tx_burst[AP] / 10, tx_burst[AP] % 10,
+			txop[STA], tx_burst[STA] / 10, tx_burst[STA] % 10);
+	}
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations fops_mt7996_txop = {
+	.write = mt7996_be_txop_set,
+	.read = mt7996_be_txop_dump,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
 static ssize_t mt7996_mlo_agc_trig_set(struct file *file,
 				       const char __user *user_buf,
 				       size_t count, loff_t *ppos)
@@ -893,6 +996,7 @@ int mt7996_mtk_init_dev_debugfs_internal(struct mt7996_phy *phy, struct dentry *
 				    mt7996_pse_fid_read);
 
 	debugfs_create_u8("dump_ple_txd", 0600, dir, &dev->dbg.dump_ple_txd);
+	debugfs_create_file("txop", 0600, dir, dev, &fops_mt7996_txop);
 
 	/* MLO related Table */
 	debugfs_create_file("mat_table", 0400, dir, dev, &mt7996_mat_table_fops);
-- 
2.45.2