mt76: mt7915: enable firmware module debug support

This allows host driver to get useful information of some important modules.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Chih-Min Chen <chih-min.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c

@@ -74,6 +74,41 @@ mt7915_dbdc_get(void *data, u64 *val)
 DEFINE_DEBUGFS_ATTRIBUTE(fops_dbdc, mt7915_dbdc_get,
 			 mt7915_dbdc_set, "%lld\n");
 
+static int
+mt7915_fw_debug_set(void *data, u64 val)
+{
+	struct mt7915_dev *dev = data;
+	enum {
+		DEBUG_TXCMD = 62,
+		DEBUG_CMD_RPT_TX,
+		DEBUG_CMD_RPT_TRIG,
+		DEBUG_SPL,
+		DEBUG_RPT_RX,
+	} debug;
+
+	dev->fw_debug = !!val;
+
+	mt7915_mcu_fw_log_2_host(dev, dev->fw_debug ? 2 : 0);
+
+	for (debug = DEBUG_TXCMD; debug <= DEBUG_RPT_RX; debug++)
+		mt7915_mcu_fw_dbg_ctrl(dev, debug, dev->fw_debug);
+
+	return 0;
+}
+
+static int
+mt7915_fw_debug_get(void *data, u64 *val)
+{
+	struct mt7915_dev *dev = data;
+
+	*val = dev->fw_debug;
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_fw_debug, mt7915_fw_debug_get,
+			 mt7915_fw_debug_set, "%lld\n");
+
 static void
 mt7915_ampdu_stat_read_phy(struct mt7915_phy *phy,
 			   struct seq_file *file)
@@ -290,6 +325,7 @@ int mt7915_init_debugfs(struct mt7915_dev *dev)
 				    mt7915_queues_acq);
 	debugfs_create_file("tx_stats", 0400, dir, dev, &fops_tx_stats);
 	debugfs_create_file("dbdc", 0600, dir, dev, &fops_dbdc);
+	debugfs_create_file("fw_debug", 0600, dir, dev, &fops_fw_debug);
 	debugfs_create_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern);
 	/* test knobs */
 	debugfs_create_file("radar_trigger", 0200, dir, dev,

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -502,6 +502,28 @@ mt7915_mcu_tx_rate_report(struct mt7915_dev *dev, struct sk_buff *skb)
 	}
 }
 
+static void
+mt7915_mcu_rx_log_message(struct mt7915_dev *dev, struct sk_buff *skb)
+{
+	struct mt7915_mcu_rxd *rxd = (struct mt7915_mcu_rxd *)skb->data;
+	const char *data = (char *)&rxd[1];
+	const char *type;
+
+	switch (rxd->s2d_index) {
+	case 0:
+		type = "WM";
+		break;
+	case 2:
+		type = "WA";
+		break;
+	default:
+		type = "unknown";
+		break;
+	}
+
+	wiphy_info(mt76_hw(dev)->wiphy, "%s: %s", type, data);
+}
+
 static void
 mt7915_mcu_rx_ext_event(struct mt7915_dev *dev, struct sk_buff *skb)
 {
@@ -519,6 +541,9 @@ mt7915_mcu_rx_ext_event(struct mt7915_dev *dev, struct sk_buff *skb)
 	case MCU_EXT_EVENT_RATE_REPORT:
 		mt7915_mcu_tx_rate_report(dev, skb);
 		break;
+	case MCU_EXT_EVENT_FW_LOG_2_HOST:
+		mt7915_mcu_rx_log_message(dev, skb);
+		break;
 	default:
 		break;
 	}
@@ -544,6 +569,7 @@ void mt7915_mcu_rx_event(struct mt7915_dev *dev, struct sk_buff *skb)
 	struct mt7915_mcu_rxd *rxd = (struct mt7915_mcu_rxd *)skb->data;
 
 	if (rxd->ext_eid == MCU_EXT_EVENT_THERMAL_PROTECT ||
+	    rxd->ext_eid == MCU_EXT_EVENT_FW_LOG_2_HOST ||
 	    rxd->ext_eid == MCU_EXT_EVENT_ASSERT_DUMP ||
 	    rxd->ext_eid == MCU_EXT_EVENT_PS_SYNC ||
 	    rxd->ext_eid == MCU_EXT_EVENT_RATE_REPORT ||
@@ -2265,6 +2291,37 @@ static int mt7915_load_firmware(struct mt7915_dev *dev)
 	return 0;
 }
 
+int mt7915_mcu_fw_log_2_host(struct mt7915_dev *dev, u8 ctrl)
+{
+	struct {
+		u8 ctrl_val;
+		u8 pad[3];
+	} data = {
+		.ctrl_val = ctrl
+	};
+
+	return __mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_FW_LOG_2_HOST,
+				   &data, sizeof(data), true);
+}
+
+int mt7915_mcu_fw_dbg_ctrl(struct mt7915_dev *dev, u32 module, u8 level)
+{
+	struct {
+		u8 ver;
+		u8 pad;
+		u16 len;
+		u8 level;
+		u8 rsv[3];
+		u32 module_idx;
+	} data = {
+		.module_idx = cpu_to_le32(module),
+		.level = level,
+	};
+
+	return __mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_FW_DBG_CTRL,
+				   &data, sizeof(data), false);
+}
+
 int mt7915_mcu_init(struct mt7915_dev *dev)
 {
 	static const struct mt76_mcu_ops mt7915_mcu_ops = {
@@ -2286,6 +2343,7 @@ int mt7915_mcu_init(struct mt7915_dev *dev)
 		return ret;
 
 	set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
+	mt7915_mcu_fw_log_2_host(dev, 0);
 
 	return 0;
 }

drivers/net/wireless/mediatek/mt76/mt7915/mcu.h

@@ -38,6 +38,7 @@ enum {
 /* ext event table */
 enum {
 	MCU_EXT_EVENT_PS_SYNC = 0x5,
+	MCU_EXT_EVENT_FW_LOG_2_HOST = 0x13,
 	MCU_EXT_EVENT_THERMAL_PROTECT = 0x22,
 	MCU_EXT_EVENT_ASSERT_DUMP = 0x23,
 	MCU_EXT_EVENT_RDD_REPORT = 0x3a,
@@ -192,6 +193,7 @@ enum {
 	MCU_EXT_CMD_EFUSE_ACCESS = 0x01,
 	MCU_EXT_CMD_PM_STATE_CTRL = 0x07,
 	MCU_EXT_CMD_CHANNEL_SWITCH = 0x08,
+	MCU_EXT_CMD_FW_LOG_2_HOST = 0x13,
 	MCU_EXT_CMD_EFUSE_BUFFER_MODE = 0x21,
 	MCU_EXT_CMD_STA_REC_UPDATE = 0x25,
 	MCU_EXT_CMD_BSS_INFO_UPDATE = 0x26,
@@ -207,6 +209,7 @@ enum {
 	MCU_EXT_CMD_SET_SER_TRIGGER = 0x81,
 	MCU_EXT_CMD_SCS_CTRL = 0x82,
 	MCU_EXT_CMD_RATE_CTRL = 0x87,
+	MCU_EXT_CMD_FW_DBG_CTRL = 0x95,
 	MCU_EXT_CMD_SET_RDD_TH = 0x9d,
 };
 

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -324,6 +324,8 @@ int mt7915_mcu_get_rate_info(struct mt7915_dev *dev, u32 cmd, u16 wlan_idx);
 int mt7915_mcu_get_temperature(struct mt7915_dev *dev, int index);
 int mt7915_mcu_rdd_cmd(struct mt7915_dev *dev, enum mt7915_rdd_cmd cmd,
 		       u8 index, u8 rx_sel, u8 val);
+int mt7915_mcu_fw_log_2_host(struct mt7915_dev *dev, u8 ctrl);
+int mt7915_mcu_fw_dbg_ctrl(struct mt7915_dev *dev, u32 module, u8 level);
 void mt7915_mcu_rx_event(struct mt7915_dev *dev, struct sk_buff *skb);
 void mt7915_mcu_exit(struct mt7915_dev *dev);