Commit b662b71a authored by Ryder Lee's avatar Ryder Lee Committed by Felix Fietkau
Browse files

wifi: mt76: mt7915: add full system reset into debugfs 



Trigger firmware crash and enable full system recovery through debugfs.
This also renames knob "fw_ser" to a clear-cut name "sys_recovery".

Signed-off-by: default avatarRyder Lee <ryder.lee@mediatek.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 8a55712d

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

+67 −14
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_implicit_txbf, mt7915_implicit_txbf_get, 


/* test knob of system error recovery */

static ssize_t

mt7915_fw_ser_set(struct file *file, const char __user *user_buf,

mt7915_sys_recovery_set(struct file *file, const char __user *user_buf,

			size_t count, loff_t *ppos)

{

	struct mt7915_phy *phy = file->private_data;
@@ -71,8 +71,18 @@ mt7915_fw_ser_set(struct file *file, const char __user *user_buf, 
		return -EINVAL;



	switch (val) {

	/*

	 * 0: grab firmware current SER state.

	 * 1: trigger & enable system error L1 recovery.

	 * 2: trigger & enable system error L2 recovery.

	 * 3: trigger & enable system error L3 rx abort.

	 * 4: trigger & enable system error L3 tx abort

	 * 5: trigger & enable system error L3 tx disable.

	 * 6: trigger & enable system error L3 bf recovery.

	 * 7: trigger & enable system error full recovery.

	 * 8: trigger firmware crash.

	 */

	case SER_QUERY:

		/* grab firmware SER stats */

		ret = mt7915_mcu_set_ser(dev, 0, 0, ext_phy);

		break;

	case SER_SET_RECOVER_L1:
@@ -87,6 +97,23 @@ mt7915_fw_ser_set(struct file *file, const char __user *user_buf, 


		ret = mt7915_mcu_set_ser(dev, SER_RECOVER, val, ext_phy);

		break;



	/* enable full chip reset */

	case SER_SET_RECOVER_FULL:

		mt76_set(dev, MT_WFDMA0_MCU_HOST_INT_ENA, MT_MCU_CMD_WDT_MASK);

		ret = mt7915_mcu_set_ser(dev, 1, 3, ext_phy);

		if (ret)

			return ret;



		dev->recovery.state |= MT_MCU_CMD_WDT_MASK;

		mt7915_reset(dev);

		break;



	/* WARNING: trigger firmware crash */

	case SER_SET_SYSTEM_ASSERT:

		mt76_wr(dev, MT_MCU_WM_CIRQ_EINT_MASK_CLR_ADDR, BIT(18));

		mt76_wr(dev, MT_MCU_WM_CIRQ_EINT_SOFT_ADDR, BIT(18));

		break;

	default:

		break;

	}
@@ -95,7 +122,7 @@ mt7915_fw_ser_set(struct file *file, const char __user *user_buf, 
}



static ssize_t

mt7915_fw_ser_get(struct file *file, char __user *user_buf,

mt7915_sys_recovery_get(struct file *file, char __user *user_buf,

			size_t count, loff_t *ppos)

{

	struct mt7915_phy *phy = file->private_data;
@@ -103,12 +130,37 @@ mt7915_fw_ser_get(struct file *file, char __user *user_buf, 
	char *buff;

	int desc = 0;

	ssize_t ret;

	static const size_t bufsz = 400;

	static const size_t bufsz = 1024;



	buff = kmalloc(bufsz, GFP_KERNEL);

	if (!buff)

		return -ENOMEM;



	/* HELP */

	desc += scnprintf(buff + desc, bufsz - desc,

			  "Please echo the correct value ...\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "0: grab firmware transient SER state\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "1: trigger system error L1 recovery\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "2: trigger system error L2 recovery\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "3: trigger system error L3 rx abort\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "4: trigger system error L3 tx abort\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "5: trigger system error L3 tx disable\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "6: trigger system error L3 bf recovery\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "7: trigger system error full recovery\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "8: trigger firmware crash\n");



	/* SER statistics */

	desc += scnprintf(buff + desc, bufsz - desc,

			  "\nlet's dump firmware SER statistics...\n");

	desc += scnprintf(buff + desc, bufsz - desc,

			  "::E  R , SER_STATUS        = 0x%08x\n",

			  mt76_rr(dev, MT_SWDEF_SER_STATS));
@@ -139,15 +191,19 @@ mt7915_fw_ser_get(struct file *file, char __user *user_buf, 
	desc += scnprintf(buff + desc, bufsz - desc,

			  "::E  R , SER_LMAC_WISR7_B1 = 0x%08x\n",

			  mt76_rr(dev, MT_SWDEF_LAMC_WISR7_BN1_STATS));

	desc += scnprintf(buff + desc, bufsz - desc,

			  "\nSYS_RESET_COUNT: WM %d, WA %d\n",

			  dev->recovery.wm_reset_count,

			  dev->recovery.wa_reset_count);



	ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);

	kfree(buff);

	return ret;

}



static const struct file_operations mt7915_fw_ser_ops = {

	.write = mt7915_fw_ser_set,

	.read = mt7915_fw_ser_get,

static const struct file_operations mt7915_sys_recovery_ops = {

	.write = mt7915_sys_recovery_set,

	.read = mt7915_sys_recovery_get,

	.open = simple_open,

	.llseek = default_llseek,

};
@@ -598,10 +654,6 @@ mt7915_fw_util_wm_show(struct seq_file *file, void *data) 
	struct mt7915_dev *dev = file->private;



	seq_printf(file, "Program counter: 0x%x\n", mt76_rr(dev, MT_WM_MCU_PC));

	seq_printf(file, "Exception state: 0x%x\n",

		   is_mt7915(&dev->mt76) ?

		   (u32)mt76_get_field(dev, MT_FW_EXCEPTION, GENMASK(15, 8)) :

		   (u32)mt76_get_field(dev, MT_FW_EXCEPTION, GENMASK(7, 0)));



	if (dev->fw.debug_wm) {

		seq_printf(file, "Busy: %u%%  Peak busy: %u%%\n",
@@ -1009,7 +1061,8 @@ int mt7915_init_debugfs(struct mt7915_phy *phy) 
	debugfs_create_file("xmit-queues", 0400, dir, phy,

			    &mt7915_xmit_queues_fops);

	debugfs_create_file("tx_stats", 0400, dir, phy, &mt7915_tx_stats_fops);

	debugfs_create_file("fw_ser", 0600, dir, phy, &mt7915_fw_ser_ops);

	debugfs_create_file("sys_recovery", 0600, dir, phy,

			    &mt7915_sys_recovery_ops);

	debugfs_create_file("fw_debug_wm", 0600, dir, dev, &fops_fw_debug_wm);

	debugfs_create_file("fw_debug_wa", 0600, dir, dev, &fops_fw_debug_wa);

	debugfs_create_file("fw_debug_bin", 0600, dir, dev, &fops_fw_debug_bin);

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

+5 −0
Original line number Diff line number Diff line
@@ -1526,6 +1526,11 @@ void mt7915_mac_reset_work(struct work_struct *work) 
		mt76_clear(dev, MT_WFDMA0_MCU_HOST_INT_ENA,

			   MT_MCU_CMD_WDT_MASK);



		if (READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WA_WDT)

			dev->recovery.wa_reset_count++;

		else

			dev->recovery.wm_reset_count++;



		mt7915_mac_full_reset(dev);



		/* enable mcu irq */

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

+2 −0
Original line number Diff line number Diff line
@@ -450,6 +450,8 @@ enum { 
	SER_SET_RECOVER_L3_TX_ABORT,

	SER_SET_RECOVER_L3_TX_DISABLE,

	SER_SET_RECOVER_L3_BF,

	SER_SET_RECOVER_FULL,

	SER_SET_SYSTEM_ASSERT,

	/* action */

	SER_ENABLE = 2,

	SER_RECOVER

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

+2 −0
Original line number Diff line number Diff line
@@ -310,6 +310,8 @@ struct mt7915_dev { 


	struct {

		u32 state;

		u32 wa_reset_count;

		u32 wm_reset_count;

		bool hw_full_reset:1;

		bool hw_init_done:1;

		bool restart:1;

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

+4 −0
Original line number Diff line number Diff line
@@ -733,6 +733,8 @@ enum offs_rev { 
#define MT_MCU_CMD_NORMAL_STATE		BIT(5)

#define MT_MCU_CMD_ERROR_MASK		GENMASK(5, 1)



#define MT_MCU_CMD_WA_WDT		BIT(31)

#define MT_MCU_CMD_WM_WDT		BIT(30)

#define MT_MCU_CMD_WDT_MASK		GENMASK(31, 30)



/* TOP RGU */
@@ -1151,5 +1153,7 @@ enum offs_rev { 
#define MT_MCU_WM_CIRQ(ofs)			(MT_MCU_WM_CIRQ_BASE + (ofs))

#define MT_MCU_WM_CIRQ_IRQ_MASK_CLR_ADDR	MT_MCU_WM_CIRQ(0x80)

#define MT_MCU_WM_CIRQ_IRQ_SOFT_ADDR		MT_MCU_WM_CIRQ(0xc0)

#define MT_MCU_WM_CIRQ_EINT_MASK_CLR_ADDR	MT_MCU_WM_CIRQ(0x108)

#define MT_MCU_WM_CIRQ_EINT_SOFT_ADDR		MT_MCU_WM_CIRQ(0x118)



#endif