| Message ID | 1621482401-29025-3-git-send-email-sean.wang@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
> From: Sean Wang <sean.wang@mediatek.com> > > 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 > > Fixes: 87843566e581 ("mt76: mt7921: enable deep sleep at runtime") > 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> > --- > .../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 e29d4fdab572..ebd365ceb70d 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c > +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c > @@ -1284,9 +1284,10 @@ 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); > @@ -1304,22 +1305,23 @@ 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"); > 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; > } > @@ -1340,6 +1342,7 @@ 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); I guess we should avoid mt7921_vif_connect_iter and mt76_connac_power_save_sched if hw reset fails, what do you think? Regards, Lorenzo > } > > 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 5a4c695f73c9..486e5593d99a 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c > +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c > @@ -1296,17 +1296,12 @@ 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, > @@ -1326,6 +1321,22 @@ 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 59862ea4951c..03bcb210c357 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h > +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h > @@ -368,6 +368,7 @@ 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); > -- > 2.25.1 >
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index e29d4fdab572..ebd365ceb70d 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -1284,9 +1284,10 @@ 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); @@ -1304,22 +1305,23 @@ 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"); 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; } @@ -1340,6 +1342,7 @@ 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 5a4c695f73c9..486e5593d99a 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c @@ -1296,17 +1296,12 @@ 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, @@ -1326,6 +1321,22 @@ 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 59862ea4951c..03bcb210c357 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h @@ -368,6 +368,7 @@ 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);