[PATCH v3 2/4] wifi: mt76: mt7915: enable full system reset support
Ryder Lee
ryder.lee at mediatek.com
Wed Nov 9 12:36:32 PST 2022
From: Bo Jiao <bo.jiao at mediatek.com>
Add mt7915_reset() and refactor mt7915_mac_reset_work() to support
full system recovery.
Co-developed-by: Ryder Lee <ryder.lee at mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee at mediatek.com>
Signed-off-by: Bo Jiao <bo.jiao at mediatek.com>
---
change since v2 - change dev_info to make it easier to see that firmware crashed while looking at dmesg.
---
.../net/wireless/mediatek/mt76/mt7915/init.c | 11 +-
.../net/wireless/mediatek/mt76/mt7915/mac.c | 214 +++++++++++++++++-
.../net/wireless/mediatek/mt76/mt7915/main.c | 18 +-
.../net/wireless/mediatek/mt76/mt7915/mcu.c | 24 +-
.../net/wireless/mediatek/mt76/mt7915/mmio.c | 7 +-
.../wireless/mediatek/mt76/mt7915/mt7915.h | 15 +-
.../net/wireless/mediatek/mt76/mt7915/regs.h | 4 +
7 files changed, 267 insertions(+), 26 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 324db5291c85..1f39aa3e3f3d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -262,9 +262,8 @@ static void mt7915_led_set_brightness(struct led_classdev *led_cdev,
mt7915_led_set_config(led_cdev, 0xff, 0);
}
-static void
-mt7915_init_txpower(struct mt7915_dev *dev,
- struct ieee80211_supported_band *sband)
+void mt7915_init_txpower(struct mt7915_dev *dev,
+ struct ieee80211_supported_band *sband)
{
int i, n_chains = hweight8(dev->mphy.antenna_mask);
int nss_delta = mt76_tx_power_nss_delta(n_chains);
@@ -446,7 +445,7 @@ mt7915_mac_init_band(struct mt7915_dev *dev, u8 band)
mt76_clear(dev, MT_DMA_DCR0(band), MT_DMA_DCR0_RXD_G5_EN);
}
-static void mt7915_mac_init(struct mt7915_dev *dev)
+void mt7915_mac_init(struct mt7915_dev *dev)
{
int i;
u32 rx_len = is_mt7915(&dev->mt76) ? 0x400 : 0x680;
@@ -476,7 +475,7 @@ static void mt7915_mac_init(struct mt7915_dev *dev)
}
}
-static int mt7915_txbf_init(struct mt7915_dev *dev)
+int mt7915_txbf_init(struct mt7915_dev *dev)
{
int ret;
@@ -1117,6 +1116,8 @@ int mt7915_register_device(struct mt7915_dev *dev)
goto unreg_thermal;
}
+ dev->recovery.hw_init_done = true;
+
mt7915_init_debugfs(&dev->phy);
return 0;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 3b1259f14de6..69ce3b39aa53 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1265,7 +1265,7 @@ mt7915_wait_reset_state(struct mt7915_dev *dev, u32 state)
bool ret;
ret = wait_event_timeout(dev->reset_wait,
- (READ_ONCE(dev->reset_state) & state),
+ (READ_ONCE(dev->recovery.state) & state),
MT7915_RESET_TIMEOUT);
WARN(!ret, "Timeout waiting for MCU reset state %x\n", state);
@@ -1320,6 +1320,171 @@ void mt7915_tx_token_put(struct mt7915_dev *dev)
idr_destroy(&dev->mt76.token);
}
+static int
+mt7915_mac_restart(struct mt7915_dev *dev)
+{
+ struct mt7915_phy *phy2;
+ struct mt76_phy *ext_phy;
+ struct mt76_dev *mdev = &dev->mt76;
+ int i, ret;
+ u32 irq_mask;
+
+ ext_phy = dev->mt76.phys[MT_BAND1];
+ phy2 = ext_phy ? ext_phy->priv : NULL;
+
+ if (dev->hif2) {
+ mt76_wr(dev, MT_INT1_MASK_CSR, 0x0);
+ mt76_wr(dev, MT_INT1_SOURCE_CSR, ~0);
+ }
+
+ if (dev_is_pci(mdev->dev)) {
+ mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
+ if (dev->hif2)
+ mt76_wr(dev, MT_PCIE1_MAC_INT_ENABLE, 0x0);
+ }
+
+ set_bit(MT76_RESET, &dev->mphy.state);
+ set_bit(MT76_MCU_RESET, &dev->mphy.state);
+ wake_up(&dev->mt76.mcu.wait);
+ if (ext_phy) {
+ set_bit(MT76_RESET, &ext_phy->state);
+ set_bit(MT76_MCU_RESET, &ext_phy->state);
+ }
+
+ /* lock/unlock all queues to ensure that no tx is pending */
+ mt76_txq_schedule_all(&dev->mphy);
+ if (ext_phy)
+ mt76_txq_schedule_all(ext_phy);
+
+ /* disable all tx/rx napi */
+ mt76_worker_disable(&dev->mt76.tx_worker);
+ mt76_for_each_q_rx(mdev, i) {
+ if (mdev->q_rx[i].ndesc)
+ napi_disable(&dev->mt76.napi[i]);
+ }
+ napi_disable(&dev->mt76.tx_napi);
+
+ /* token reinit */
+ mt7915_tx_token_put(dev);
+ idr_init(&dev->mt76.token);
+
+ mt7915_dma_reset(dev, true);
+
+ local_bh_disable();
+ mt76_for_each_q_rx(mdev, i) {
+ if (mdev->q_rx[i].ndesc) {
+ napi_enable(&dev->mt76.napi[i]);
+ napi_schedule(&dev->mt76.napi[i]);
+ }
+ }
+ local_bh_enable();
+ clear_bit(MT76_MCU_RESET, &dev->mphy.state);
+ clear_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
+
+ mt76_wr(dev, MT_INT_MASK_CSR, dev->mt76.mmio.irqmask);
+ mt76_wr(dev, MT_INT_SOURCE_CSR, ~0);
+
+ if (dev->hif2) {
+ mt76_wr(dev, MT_INT1_MASK_CSR, irq_mask);
+ mt76_wr(dev, MT_INT1_SOURCE_CSR, ~0);
+ }
+ if (dev_is_pci(mdev->dev)) {
+ mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+ if (dev->hif2)
+ mt76_wr(dev, MT_PCIE1_MAC_INT_ENABLE, 0xff);
+ }
+
+ /* load firmware */
+ ret = mt7915_mcu_init_firmware(dev);
+ if (ret)
+ goto out;
+
+ /* set the necessary init items */
+ ret = mt7915_mcu_set_eeprom(dev);
+ if (ret)
+ goto out;
+
+ mt7915_mac_init(dev);
+ mt7915_init_txpower(dev, &dev->mphy.sband_2g.sband);
+ mt7915_init_txpower(dev, &dev->mphy.sband_5g.sband);
+ ret = mt7915_txbf_init(dev);
+
+ if (test_bit(MT76_STATE_RUNNING, &dev->mphy.state)) {
+ ret = mt7915_run(dev->mphy.hw);
+ if (ret)
+ goto out;
+ }
+
+ if (ext_phy && test_bit(MT76_STATE_RUNNING, &ext_phy->state)) {
+ ret = mt7915_run(ext_phy->hw);
+ if (ret)
+ goto out;
+ }
+
+out:
+ /* reset done */
+ clear_bit(MT76_RESET, &dev->mphy.state);
+ if (phy2)
+ clear_bit(MT76_RESET, &phy2->mt76->state);
+
+ local_bh_disable();
+ napi_enable(&dev->mt76.tx_napi);
+ napi_schedule(&dev->mt76.tx_napi);
+ local_bh_enable();
+
+ mt76_worker_enable(&dev->mt76.tx_worker);
+
+ return ret;
+}
+
+static void
+mt7915_mac_full_reset(struct mt7915_dev *dev)
+{
+ struct mt7915_phy *phy2;
+ struct mt76_phy *ext_phy;
+ int i;
+
+ ext_phy = dev->mt76.phys[MT_BAND1];
+ phy2 = ext_phy ? ext_phy->priv : NULL;
+
+ dev->recovery.hw_full_reset = true;
+
+ wake_up(&dev->mt76.mcu.wait);
+ ieee80211_stop_queues(mt76_hw(dev));
+ if (ext_phy)
+ ieee80211_stop_queues(ext_phy->hw);
+
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
+ if (ext_phy)
+ cancel_delayed_work_sync(&ext_phy->mac_work);
+
+ mutex_lock(&dev->mt76.mutex);
+ for (i = 0; i < 10; i++) {
+ if (!mt7915_mac_restart(dev))
+ break;
+ }
+ mutex_unlock(&dev->mt76.mutex);
+
+ if (i == 10)
+ dev_err(dev->mt76.dev, "chip full reset failed\n");
+
+ ieee80211_restart_hw(mt76_hw(dev));
+ if (ext_phy)
+ ieee80211_restart_hw(ext_phy->hw);
+
+ ieee80211_wake_queues(mt76_hw(dev));
+ if (ext_phy)
+ ieee80211_wake_queues(ext_phy->hw);
+
+ dev->recovery.hw_full_reset = false;
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
+ MT7915_WATCHDOG_TIME);
+ if (ext_phy)
+ ieee80211_queue_delayed_work(ext_phy->hw,
+ &ext_phy->mac_work,
+ MT7915_WATCHDOG_TIME);
+}
+
/* system error recovery */
void mt7915_mac_reset_work(struct work_struct *work)
{
@@ -1332,7 +1497,28 @@ void mt7915_mac_reset_work(struct work_struct *work)
ext_phy = dev->mt76.phys[MT_BAND1];
phy2 = ext_phy ? ext_phy->priv : NULL;
- if (!(READ_ONCE(dev->reset_state) & MT_MCU_CMD_STOP_DMA))
+ /* chip full reset */
+ if (dev->recovery.restart) {
+ /* disable WA/WM WDT */
+ mt76_clear(dev, MT_WFDMA0_MCU_HOST_INT_ENA,
+ MT_MCU_CMD_WDT_MASK);
+
+ mt7915_mac_full_reset(dev);
+
+ /* enable mcu irq */
+ mt7915_irq_enable(dev, MT_INT_MCU_CMD);
+ mt7915_irq_disable(dev, 0);
+
+ /* enable WA/WM WDT */
+ mt76_set(dev, MT_WFDMA0_MCU_HOST_INT_ENA, MT_MCU_CMD_WDT_MASK);
+
+ dev->recovery.state = MT_MCU_CMD_NORMAL_STATE;
+ dev->recovery.restart = false;
+ return;
+ }
+
+ /* chip partial reset */
+ if (!(READ_ONCE(dev->recovery.state) & MT_MCU_CMD_STOP_DMA))
return;
ieee80211_stop_queues(mt76_hw(dev));
@@ -1406,6 +1592,30 @@ void mt7915_mac_reset_work(struct work_struct *work)
MT7915_WATCHDOG_TIME);
}
+void mt7915_reset(struct mt7915_dev *dev)
+{
+ if (!dev->recovery.hw_init_done)
+ return;
+
+ if (dev->recovery.hw_full_reset)
+ return;
+
+ /* wm/wa exception: do full recovery */
+ if (READ_ONCE(dev->recovery.state) & MT_MCU_CMD_WDT_MASK) {
+ dev->recovery.restart = true;
+ dev_info(dev->mt76.dev,
+ "%s indicated firmware crash, attempting recovery\n",
+ wiphy_name(dev->mt76.hw->wiphy));
+
+ mt7915_irq_disable(dev, MT_INT_MCU_CMD);
+ queue_work(dev->mt76.wq, &dev->reset_work);
+ return;
+ }
+
+ queue_work(dev->mt76.wq, &dev->reset_work);
+ wake_up(&dev->reset_wait);
+}
+
void mt7915_mac_update_stats(struct mt7915_phy *phy)
{
struct mt7915_dev *dev = phy->dev;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index 6de49b93387e..32c362965dc4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -20,17 +20,13 @@ static bool mt7915_dev_running(struct mt7915_dev *dev)
return phy && test_bit(MT76_STATE_RUNNING, &phy->mt76->state);
}
-static int mt7915_start(struct ieee80211_hw *hw)
+int mt7915_run(struct ieee80211_hw *hw)
{
struct mt7915_dev *dev = mt7915_hw_dev(hw);
struct mt7915_phy *phy = mt7915_hw_phy(hw);
bool running;
int ret;
- flush_work(&dev->init_work);
-
- mutex_lock(&dev->mt76.mutex);
-
running = mt7915_dev_running(dev);
if (!running) {
@@ -80,6 +76,18 @@ static int mt7915_start(struct ieee80211_hw *hw)
mt7915_mac_reset_counters(phy);
out:
+ return ret;
+}
+
+static int mt7915_start(struct ieee80211_hw *hw)
+{
+ struct mt7915_dev *dev = mt7915_hw_dev(hw);
+ int ret;
+
+ flush_work(&dev->init_work);
+
+ mutex_lock(&dev->mt76.mutex);
+ ret = mt7915_run(hw);
mutex_unlock(&dev->mt76.mutex);
return ret;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 65ae959859e7..17fe29d8fd71 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -2249,18 +2249,10 @@ mt7915_mcu_init_rx_airtime(struct mt7915_dev *dev)
sizeof(req), true);
}
-int mt7915_mcu_init(struct mt7915_dev *dev)
+int mt7915_mcu_init_firmware(struct mt7915_dev *dev)
{
- static const struct mt76_mcu_ops mt7915_mcu_ops = {
- .headroom = sizeof(struct mt76_connac2_mcu_txd),
- .mcu_skb_send_msg = mt7915_mcu_send_message,
- .mcu_parse_response = mt7915_mcu_parse_response,
- .mcu_restart = mt76_connac_mcu_restart,
- };
int ret;
- dev->mt76.mcu_ops = &mt7915_mcu_ops;
-
/* force firmware operation mode into normal state,
* which should be set before firmware download stage.
*/
@@ -2309,6 +2301,20 @@ int mt7915_mcu_init(struct mt7915_dev *dev)
MCU_WA_PARAM_RED, 0, 0);
}
+int mt7915_mcu_init(struct mt7915_dev *dev)
+{
+ static const struct mt76_mcu_ops mt7915_mcu_ops = {
+ .headroom = sizeof(struct mt76_connac2_mcu_txd),
+ .mcu_skb_send_msg = mt7915_mcu_send_message,
+ .mcu_parse_response = mt7915_mcu_parse_response,
+ .mcu_restart = mt76_connac_mcu_restart,
+ };
+
+ dev->mt76.mcu_ops = &mt7915_mcu_ops;
+
+ return mt7915_mcu_init_firmware(dev);
+}
+
void mt7915_mcu_exit(struct mt7915_dev *dev)
{
__mt76_mcu_restart(&dev->mt76);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
index be1b8ea711c7..032af46289af 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
@@ -746,10 +746,9 @@ static void mt7915_irq_tasklet(struct tasklet_struct *t)
u32 val = mt76_rr(dev, MT_MCU_CMD);
mt76_wr(dev, MT_MCU_CMD, val);
- if (val & MT_MCU_CMD_ERROR_MASK) {
- dev->reset_state = val;
- queue_work(dev->mt76.wq, &dev->reset_work);
- wake_up(&dev->reset_wait);
+ if (val & (MT_MCU_CMD_ERROR_MASK | MT_MCU_CMD_WDT_MASK)) {
+ dev->recovery.state = val;
+ mt7915_reset(dev);
}
}
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 5af26e60e902..49caf7b21a20 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -303,7 +303,13 @@ struct mt7915_dev {
struct work_struct rc_work;
struct work_struct reset_work;
wait_queue_head_t reset_wait;
- u32 reset_state;
+
+ struct {
+ u32 state;
+ bool hw_full_reset:1;
+ bool hw_init_done:1;
+ bool restart:1;
+ } recovery;
struct list_head sta_rc_list;
struct list_head sta_poll_list;
@@ -444,7 +450,13 @@ int mt7915_dma_init(struct mt7915_dev *dev, struct mt7915_phy *phy2);
void mt7915_dma_prefetch(struct mt7915_dev *dev);
void mt7915_dma_cleanup(struct mt7915_dev *dev);
int mt7915_dma_reset(struct mt7915_dev *dev, bool force);
+int mt7915_txbf_init(struct mt7915_dev *dev);
+void mt7915_init_txpower(struct mt7915_dev *dev,
+ struct ieee80211_supported_band *sband);
+void mt7915_reset(struct mt7915_dev *dev);
+int mt7915_run(struct ieee80211_hw *hw);
int mt7915_mcu_init(struct mt7915_dev *dev);
+int mt7915_mcu_init_firmware(struct mt7915_dev *dev);
int mt7915_mcu_twt_agrt_update(struct mt7915_dev *dev,
struct mt7915_vif *mvif,
struct mt7915_twt_flow *flow,
@@ -544,6 +556,7 @@ static inline void mt7915_irq_disable(struct mt7915_dev *dev, u32 mask)
mt76_set_irq_mask(&dev->mt76, MT_INT_MASK_CSR, mask, 0);
}
+void mt7915_mac_init(struct mt7915_dev *dev);
u32 mt7915_mac_wtbl_lmac_addr(struct mt7915_dev *dev, u16 wcid, u8 dw);
bool mt7915_mac_wtbl_update(struct mt7915_dev *dev, int idx, u32 mask);
void mt7915_mac_reset_counters(struct mt7915_phy *phy);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
index 5180dd931835..9120380d74c6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
@@ -541,6 +541,8 @@ enum offs_rev {
#define MT_WFDMA0_BUSY_ENA_TX_FIFO1 BIT(1)
#define MT_WFDMA0_BUSY_ENA_RX_FIFO BIT(2)
+#define MT_WFDMA0_MCU_HOST_INT_ENA MT_WFDMA0(0x1f4)
+
#define MT_WFDMA0_GLO_CFG MT_WFDMA0(0x208)
#define MT_WFDMA0_GLO_CFG_TX_DMA_EN BIT(0)
#define MT_WFDMA0_GLO_CFG_RX_DMA_EN BIT(2)
@@ -709,6 +711,8 @@ enum offs_rev {
#define MT_MCU_CMD_NORMAL_STATE BIT(5)
#define MT_MCU_CMD_ERROR_MASK GENMASK(5, 1)
+#define MT_MCU_CMD_WDT_MASK GENMASK(31, 30)
+
/* TOP RGU */
#define MT_TOP_RGU_BASE 0x18000000
#define MT_TOP_PWR_CTRL (MT_TOP_RGU_BASE + (0x0))
--
2.36.1
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