mt76: mt7921: introduce mt7921_wpdma_reinit_cond utility routine

Add mt7921_wpdma_reinit_cond to check dummy reg if driver needs to
reinitialized WPDMA after driver_own operation

Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Co-developed-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac.h b/drivers/net/wireless/mediatek/mt76/mt76_connac.h
index 9e61c10..6c889b9 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac.h
@@ -64,11 +64,13 @@ struct mt76_connac_pm {
        struct delayed_work ps_work;
        unsigned long last_activity;
        unsigned long idle_timeout;
+
        struct {
                unsigned long last_wake_event;
                unsigned long awake_time;
                unsigned long last_doze_event;
                unsigned long doze_time;
+               unsigned int lp_wake;
        } stats;
 };
 

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
index f398257..6ee423d 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
@@ -269,6 +269,7 @@ mt7921_pm_stats(struct seq_file *s, void *data)
 {
        struct mt7921_dev *dev = dev_get_drvdata(s->private);
        struct mt76_connac_pm *pm = &dev->pm;
+
        unsigned long awake_time = pm->stats.awake_time;
        unsigned long doze_time = pm->stats.doze_time;
 
@@ -281,6 +282,8 @@ mt7921_pm_stats(struct seq_file *s, void *data)
                   jiffies_to_msecs(awake_time),
                   jiffies_to_msecs(doze_time));
 
+       seq_printf(s, "low power wakes: %9d\n", pm->stats.lp_wake);
+
        return 0;
 }
 

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
index fb7f98d..71e664e 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
@@ -353,6 +353,31 @@ int mt7921_wpdma_reset(struct mt7921_dev *dev, bool force)
        return 0;
 }
 
+int mt7921_wpdma_reinit_cond(struct mt7921_dev *dev)
+{
+       struct mt76_connac_pm *pm = &dev->pm;
+       int err;
+
+       /* check if the wpdma must be reinitialized */
+       if (mt7921_dma_need_reinit(dev)) {
+               /* disable interrutpts */
+               mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
+               mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
+
+               err = mt7921_wpdma_reset(dev, false);
+               if (err) {
+                       dev_err(dev->mt76.dev, "wpdma reset failed\n");
+                       return err;
+               }
+
+               /* enable interrutpts */
+               mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
+               pm->stats.lp_wake++;
+       }
+
+       return 0;
+}
+
 int mt7921_dma_init(struct mt7921_dev *dev)
 {
        /* Increase buffer size to receive large VHT/HE MPDUs */

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index 67a2571..5bcbf1b 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -254,6 +254,7 @@ int mt7921_eeprom_get_target_power(struct mt7921_dev *dev,
 void mt7921_eeprom_init_sku(struct mt7921_dev *dev);
 int mt7921_dma_init(struct mt7921_dev *dev);
 int mt7921_wpdma_reset(struct mt7921_dev *dev, bool force);
+int mt7921_wpdma_reinit_cond(struct mt7921_dev *dev);
 void mt7921_dma_cleanup(struct mt7921_dev *dev);
 int mt7921_run_firmware(struct mt7921_dev *dev);
 int mt7921_mcu_init(struct mt7921_dev *dev);
@@ -315,6 +316,11 @@ mt7921_l1_rmw(struct mt7921_dev *dev, u32 addr, u32 mask, u32 val)
 #define mt7921_l1_set(dev, addr, val)  mt7921_l1_rmw(dev, addr, 0, val)
 #define mt7921_l1_clear(dev, addr, val)        mt7921_l1_rmw(dev, addr, val, 0)
 
+static inline bool mt7921_dma_need_reinit(struct mt7921_dev *dev)
+{
+       return !mt76_get_field(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
+}
+
 void mt7921_mac_init(struct mt7921_dev *dev);
 bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask);
 void mt7921_mac_reset_counters(struct mt7921_phy *phy);