From 7556e60ec860e301a053dad4b16b7e88ccd9baa7 Mon Sep 17 00:00:00 2001
From: Bo Jiao <Bo.Jiao@mediatek.com>
Date: Fri, 19 May 2023 14:56:07 +0800
Subject: [PATCH 50/98] wifi: mt76: mt7996: add debugfs for fw coredump.

Signed-off-by: Bo Jiao <Bo.Jiao@mediatek.com>
---
 mt7996/debugfs.c | 19 +++++++++++++++++--
 mt7996/mac.c     | 28 +++++++++++++++++++++++++---
 mt7996/mcu.h     |  4 ++++
 mt7996/mt7996.h  | 10 ++++++++++
 4 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/mt7996/debugfs.c b/mt7996/debugfs.c
index 92aa164..2c11837 100644
--- a/mt7996/debugfs.c
+++ b/mt7996/debugfs.c
@@ -84,6 +84,8 @@ mt7996_sys_recovery_set(struct file *file, const char __user *user_buf,
 	 * 7: trigger & enable system error L4 mdp recovery.
 	 * 8: trigger & enable system error full recovery.
 	 * 9: trigger firmware crash.
+	 * 10: trigger grab wa firmware coredump.
+	 * 11: trigger grab wm firmware coredump.
 	 */
 	case UNI_CMD_SER_QUERY:
 		ret = mt7996_mcu_set_ser(dev, UNI_CMD_SER_QUERY, 0, band);
@@ -105,15 +107,25 @@ mt7996_sys_recovery_set(struct file *file, const char __user *user_buf,
 	/* enable full chip reset */
 	case UNI_CMD_SER_SET_RECOVER_FULL:
 		mt76_set(dev, MT_WFDMA0_MCU_HOST_INT_ENA, MT_MCU_CMD_WDT_MASK);
-		dev->recovery.state |= MT_MCU_CMD_WDT_MASK;
+		dev->recovery.state |= MT_MCU_CMD_WM_WDT;
 		mt7996_reset(dev);
 		break;
 
 	/* WARNING: trigger firmware crash */
 	case UNI_CMD_SER_SET_SYSTEM_ASSERT:
+		// trigger wm assert exception
 		ret = mt7996_mcu_trigger_assert(dev);
 		if (ret)
 			return ret;
+		// trigger wa assert exception
+		mt76_wr(dev, 0x89098108, 0x20);
+		mt76_wr(dev, 0x89098118, 0x20);
+		break;
+	case UNI_CMD_SER_FW_COREDUMP_WA:
+		mt7996_coredump(dev, MT7996_COREDUMP_MANUAL_WA);
+		break;
+	case UNI_CMD_SER_FW_COREDUMP_WM:
+		mt7996_coredump(dev, MT7996_COREDUMP_MANUAL_WM);
 		break;
 	default:
 		break;
@@ -160,7 +172,10 @@ mt7996_sys_recovery_get(struct file *file, char __user *user_buf,
 			  "8: trigger system error full recovery\n");
 	desc += scnprintf(buff + desc, bufsz - desc,
 			  "9: trigger firmware crash\n");
-
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "10: trigger grab wa firmware coredump\n");
+	desc += scnprintf(buff + desc, bufsz - desc,
+			  "11: trigger grab wm firmware coredump\n");
 	/* SER statistics */
 	desc += scnprintf(buff + desc, bufsz - desc,
 			  "\nlet's dump firmware SER statistics...\n");
diff --git a/mt7996/mac.c b/mt7996/mac.c
index ee17d59..37cc94e 100644
--- a/mt7996/mac.c
+++ b/mt7996/mac.c
@@ -2021,15 +2021,36 @@ void mt7996_mac_dump_work(struct work_struct *work)
 	struct mt7996_dev *dev;
 
 	dev = container_of(work, struct mt7996_dev, dump_work);
-	if (READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WA_WDT)
+	if (dev->dump_state == MT7996_COREDUMP_MANUAL_WA ||
+	    READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WA_WDT)
 		mt7996_mac_fw_coredump(dev, MT7996_RAM_TYPE_WA);
 
-	if (READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WM_WDT)
+	if (dev->dump_state == MT7996_COREDUMP_MANUAL_WM ||
+	    READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WM_WDT)
 		mt7996_mac_fw_coredump(dev, MT7996_RAM_TYPE_WM);
 
-	queue_work(dev->mt76.wq, &dev->reset_work);
+	if (READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WDT_MASK)
+		queue_work(dev->mt76.wq, &dev->reset_work);
+
+	dev->dump_state = MT7996_COREDUMP_IDLE;
 }
 
+void mt7996_coredump(struct mt7996_dev *dev, u8 state)
+{
+	if (state == MT7996_COREDUMP_IDLE ||
+	    state >= __MT7996_COREDUMP_TYPE_MAX)
+		return;
+
+	if (dev->dump_state != MT7996_COREDUMP_IDLE)
+		return;
+
+	dev->dump_state = state;
+	dev_info(dev->mt76.dev, "%s attempting grab coredump\n",
+		 wiphy_name(dev->mt76.hw->wiphy));
+
+	queue_work(dev->mt76.wq, &dev->dump_work);
+ }
+
 void mt7996_reset(struct mt7996_dev *dev)
 {
 	if (!dev->recovery.hw_init_done)
@@ -2047,6 +2068,7 @@ void mt7996_reset(struct mt7996_dev *dev)
 
 		mt7996_irq_disable(dev, MT_INT_MCU_CMD);
 		queue_work(dev->mt76.wq, &dev->dump_work);
+		mt7996_coredump(dev, MT7996_COREDUMP_AUTO);
 		return;
 	}
 
diff --git a/mt7996/mcu.h b/mt7996/mcu.h
index 6fc5ab3..989a2ff 100644
--- a/mt7996/mcu.h
+++ b/mt7996/mcu.h
@@ -900,7 +900,11 @@ enum {
 	UNI_CMD_SER_SET_RECOVER_L3_BF,
 	UNI_CMD_SER_SET_RECOVER_L4_MDP,
 	UNI_CMD_SER_SET_RECOVER_FULL,
+	/* fw assert */
 	UNI_CMD_SER_SET_SYSTEM_ASSERT,
+	/* coredump */
+	UNI_CMD_SER_FW_COREDUMP_WA,
+	UNI_CMD_SER_FW_COREDUMP_WM,
 	/* action */
 	UNI_CMD_SER_ENABLE = 1,
 	UNI_CMD_SER_SET,
diff --git a/mt7996/mt7996.h b/mt7996/mt7996.h
index 34c8fe6..9b110cf 100644
--- a/mt7996/mt7996.h
+++ b/mt7996/mt7996.h
@@ -100,6 +100,14 @@ enum mt7996_ram_type {
 	__MT7996_RAM_TYPE_MAX,
 };
 
+enum mt7996_coredump_state {
+	MT7996_COREDUMP_IDLE = 0,
+	MT7996_COREDUMP_MANUAL_WA,
+	MT7996_COREDUMP_MANUAL_WM,
+	MT7996_COREDUMP_AUTO,
+	__MT7996_COREDUMP_TYPE_MAX,
+};
+
 enum mt7996_txq_id {
 	MT7996_TXQ_FWDL = 16,
 	MT7996_TXQ_MCU_WM,
@@ -342,6 +350,7 @@ struct mt7996_dev {
 
 	/* protects coredump data */
 	struct mutex dump_mutex;
+	u8 dump_state;
 #ifdef CONFIG_DEV_COREDUMP
 	struct {
 		struct mt7996_crash_data *crash_data[__MT7996_RAM_TYPE_MAX];
@@ -541,6 +550,7 @@ void mt7996_init_txpower(struct mt7996_dev *dev,
 			 struct ieee80211_supported_band *sband);
 int mt7996_txbf_init(struct mt7996_dev *dev);
 void mt7996_reset(struct mt7996_dev *dev);
+void mt7996_coredump(struct mt7996_dev *dev, u8 state);
 int mt7996_run(struct ieee80211_hw *hw);
 int mt7996_mcu_init(struct mt7996_dev *dev);
 int mt7996_mcu_init_firmware(struct mt7996_dev *dev);
-- 
2.18.0