From: Sean Wang sean.wang@mediatek.com
[ Upstream commit 7bf0a71e839822bb6ba04a6e163ad334314e2659 ]
To fix possibly the race to access register between the WiFi reset and the other context that is caused by explicitly cancelling ps_work and wake_work to break PM_STATE consistency.
Deep sleep would cause the hardware into the inactive state, so we forcely put device drv_own state before we start to reset.
The patch also ignore the reset request when the procedure is in progress to avoid the consecutive WiFi resets.
localhost ~ # [ 2932.073966] SError Interrupt on CPU7, code 0xbe000011 [ 2932.073967] CPU: 7 PID: 8761 Comm: kworker/u16:2 Not tainted 5.4.112 #30 [ 2932.073968] Hardware name: MediaTek Asurada rev1 board (DT) [ 2932.073968] Workqueue: phy0 ieee80211_reconfig_filter [mac80211] [ 2932.073969] pstate: 80400089 (Nzcv daIf +PAN -UAO) [ 2932.073969] pc : el1_irq+0x78/0x180 [ 2932.073970] lr : mt76_mmio_rmw+0x30/0x5c [mt76] [ 2932.073970] sp : ffffffc01142bad0 [ 2932.073970] x29: ffffffc01142bc00 x28: ffffff8f96fb1e00 [ 2932.073971] x27: ffffffd2cdc12138 x26: ffffffd2cdaeb018 [ 2932.073972] x25: 0000000000000000 x24: ffffff8fa8e14c08 [ 2932.073973] x23: 0000000080c00009 x22: ffffffd2a5603918 [ 2932.073974] x21: ffffffc01142bc10 x20: 0000007fffffffff [ 2932.073975] x19: 0000000000000000 x18: 0000000000000400 [ 2932.073975] x17: 0000000000000400 x16: ffffffd2cd2b87dc [ 2932.073976] x15: 0000000000000000 x14: 0000000000000000 [ 2932.073977] x13: 0000000000000001 x12: 0000000000000001 [ 2932.073978] x11: 0000000000000001 x10: 000000000010e000 [ 2932.073978] x9 : 0000000000000000 x8 : ffffffc013921404 [ 2932.073979] x7 : 000000b2b5593519 x6 : 0000000000300000 [ 2932.073980] x5 : 0000000000000000 x4 : ffffffc01142bbc8 [ 2932.073980] x3 : 00000000000001f0 x2 : 0000000000000000 [ 2932.073981] x1 : 0000000000021404 x0 : ffffff8fa8e12300 [ 2932.073982] Kernel panic - not syncing: Asynchronous SError Interrupt [ 2932.073983] CPU: 7 PID: 8761 Comm: kworker/u16:2 Not tainted 5.4.112 #30 [ 2932.073983] Hardware name: MediaTek Asurada rev1 board (DT) [ 2932.073984] Workqueue: phy0 ieee80211_reconfig_filter [mac80211] [ 2932.073984] Call trace: [ 2932.073985] dump_backtrace+0x0/0x14c [ 2932.073985] show_stack+0x20/0x2c [ 2932.073985] dump_stack+0xa0/0xf8 [ 2932.073986] panic+0x154/0x360 [ 2932.073986] test_taint+0x0/0x44 [ 2932.073986] arm64_serror_panic+0x78/0x84 [ 2932.073987] do_serror+0x0/0x118 [ 2932.073987] do_serror+0xa4/0x118 [ 2932.073987] el1_error+0x84/0xf8 [ 2932.073988] el1_irq+0x78/0x180 [ 2932.073988] mt76_mmio_rr+0x30/0xf0 [mt76] [ 2932.073988] mt76_mmio_rmw+0x30/0x5c [mt76] [ 2932.073989] mt7921_rmw+0x4c/0x5c [mt7921e] [ 2932.073989] mt7921_configure_filter+0x138/0x160 [mt7921e] [ 2932.073990] ieee80211_configure_filter+0x2f0/0x3e0 [mac80211] [ 2932.073990] ieee80211_reconfig_filter+0x1c/0x28 [mac80211] [ 2932.073990] process_one_work+0x208/0x3c8 [ 2932.073991] worker_thread+0x23c/0x3e8 [ 2932.073991] kthread+0x140/0x17c [ 2932.073992] ret_from_fork+0x10/0x18 [ 2932.074071] SMP: stopping secondary CPUs [ 2932.074071] Kernel Offset: 0x12bc800000 from 0xffffffc010000000 [ 2932.074072] PHYS_OFFSET: 0xfffffff180000000 [ 2932.074072] CPU features: 0x080026,2a80aa18 [ 2932.074072] Memory Limit: none
Co-developed-by: Lorenzo Bianconi lorenzo@kernel.org Signed-off-by: Lorenzo Bianconi lorenzo@kernel.org Signed-off-by: Sean Wang sean.wang@mediatek.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- .../net/wireless/mediatek/mt76/mt7921/mac.c | 21 +++++++++-------- .../net/wireless/mediatek/mt76/mt7921/mcu.c | 23 ++++++++++++++----- .../wireless/mediatek/mt76/mt7921/mt7921.h | 1 + 3 files changed, 30 insertions(+), 15 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index 493c2aba2f79..751d97bef534 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -1245,9 +1245,10 @@ mt7921_mac_reset(struct mt7921_dev *dev) mt76_worker_enable(&dev->mt76.tx_worker);
clear_bit(MT76_MCU_RESET, &dev->mphy.state); - clear_bit(MT76_STATE_PM, &dev->mphy.state);
- mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0); + mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, + MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL | + MT_INT_MCU_CMD); mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
err = mt7921_run_firmware(dev); @@ -1265,23 +1266,24 @@ mt7921_mac_reset(struct mt7921_dev *dev) /* system error recovery */ void mt7921_mac_reset_work(struct work_struct *work) { - struct ieee80211_hw *hw; - struct mt7921_dev *dev; + struct mt7921_dev *dev = container_of(work, struct mt7921_dev, + reset_work); + struct ieee80211_hw *hw = mt76_hw(dev); + struct mt76_connac_pm *pm = &dev->pm; int i;
- dev = container_of(work, struct mt7921_dev, reset_work); - hw = mt76_hw(dev); - dev_err(dev->mt76.dev, "chip reset\n"); dev->hw_full_reset = true; ieee80211_stop_queues(hw);
cancel_delayed_work_sync(&dev->mphy.mac_work); - cancel_delayed_work_sync(&dev->pm.ps_work); - cancel_work_sync(&dev->pm.wake_work); + cancel_delayed_work_sync(&pm->ps_work); + cancel_work_sync(&pm->wake_work);
mutex_lock(&dev->mt76.mutex); for (i = 0; i < 10; i++) { + __mt7921_mcu_drv_pmctrl(dev); + if (!mt7921_mac_reset(dev)) break; } @@ -1303,6 +1305,7 @@ void mt7921_mac_reset_work(struct work_struct *work) ieee80211_iterate_active_interfaces(hw, IEEE80211_IFACE_ITER_RESUME_ALL, mt7921_vif_connect_iter, NULL); + mt76_connac_power_save_sched(&dev->mt76.phy, pm); }
void mt7921_reset(struct mt76_dev *mdev) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c index 7c68182cad55..06209d58ce27 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c @@ -1299,17 +1299,12 @@ int mt7921_mcu_sta_add(struct mt7921_dev *dev, struct ieee80211_sta *sta, return mt76_connac_mcu_add_sta_cmd(&dev->mphy, &info); }
-int mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev) +int __mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev) { struct mt76_phy *mphy = &dev->mt76.phy; struct mt76_connac_pm *pm = &dev->pm; int i, err = 0;
- mutex_lock(&pm->mutex); - - if (!test_bit(MT76_STATE_PM, &mphy->state)) - goto out; - for (i = 0; i < MT7921_DRV_OWN_RETRY_COUNT; i++) { mt76_wr(dev, MT_CONN_ON_LPCTL, PCIE_LPCR_HOST_CLR_OWN); if (mt76_poll_msec(dev, MT_CONN_ON_LPCTL, @@ -1329,6 +1324,22 @@ int mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev) pm->stats.last_wake_event = jiffies; pm->stats.doze_time += pm->stats.last_wake_event - pm->stats.last_doze_event; +out: + return err; +} + +int mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev) +{ + struct mt76_phy *mphy = &dev->mt76.phy; + struct mt76_connac_pm *pm = &dev->pm; + int err = 0; + + mutex_lock(&pm->mutex); + + if (!test_bit(MT76_STATE_PM, &mphy->state)) + goto out; + + err = __mt7921_mcu_drv_pmctrl(dev); out: mutex_unlock(&pm->mutex);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h index 4cc8a372b277..710ad242fd53 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h @@ -369,6 +369,7 @@ int mt7921_mcu_uni_bss_bcnft(struct mt7921_dev *dev, struct ieee80211_vif *vif, bool enable); int mt7921_mcu_set_bss_pm(struct mt7921_dev *dev, struct ieee80211_vif *vif, bool enable); +int __mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev); int mt7921_mcu_drv_pmctrl(struct mt7921_dev *dev); int mt7921_mcu_fw_pmctrl(struct mt7921_dev *dev); void mt7921_pm_wake_work(struct work_struct *work);