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

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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: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Ryder Lee
2022-11-10 04:36:33 +08:00
committed by Felix Fietkau
parent 8a55712d12
commit b662b71ac3
5 changed files with 80 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
View File

@@ -46,8 +46,8 @@ 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,
size_t count, loff_t *ppos)
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;
struct mt7915_dev *dev = phy->dev;
@@ -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;
}
@@ -95,20 +122,45 @@ 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,
size_t count, loff_t *ppos)
mt7915_sys_recovery_get(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct mt7915_phy *phy = file->private_data;
struct mt7915_dev *dev = phy->dev;
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);

5
drivers/net/wireless/mediatek/mt76/mt7915/mac.c
View File

@@ -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 */

2
drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
View File

@@ -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

2
drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
View File

@@ -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;

4
drivers/net/wireless/mediatek/mt76/mt7915/regs.h
View File

@@ -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