[PATCH 0/4] mt76: add wed reset callbacks

[PATCH 0/4] mt76: add wed reset callbacks

[Lorenzo Bianconi]

Introduce Wireless Ethernet Dispatcher reset callbacks in order to complete
reset requested by ethernet NIC.

This patch is based on the following mtk_eth_soc series:
https://lore.kernel.org/netdev/cover.1673102767.git.lorenzo@kernel.org/T/#m830c78ce34a4383ae1dedc5349bed19a74dbf4af

Lorenzo Bianconi (2):
  wifi: mt76: mt7915: add mt7915 wed reset callbacks
  wifi: mt76: mt7915: complete wed reset support

Sujuan Chen (2):
  wifi: mt76: dma: add reset to mt76_dma_wed_setup signature
  wifi: mt76: dma: reset wed queues in mt76_dma_rx_reset

 drivers/net/wireless/mediatek/mt76/dma.c      | 27 +++++++----
 drivers/net/wireless/mediatek/mt76/dma.h      |  1 +
 drivers/net/wireless/mediatek/mt76/mt76.h     |  3 ++
 .../net/wireless/mediatek/mt76/mt7915/dma.c   | 45 ++++++++++++++++---
 .../net/wireless/mediatek/mt76/mt7915/mac.c   |  6 +++
 .../net/wireless/mediatek/mt76/mt7915/mmio.c  | 42 +++++++++++++++++
 6 files changed, 111 insertions(+), 13 deletions(-)

-- 
2.39.0

[PATCH 1/4] wifi: mt76: dma: add reset to mt76_dma_wed_setup signature

[Lorenzo Bianconi]

From: Sujuan Chen <sujuan.chen@mediatek.com>

Export mt76_dma_wed_setup routine. This is a preliminary patch to
introduce proper wed reset support.

Tested-by: Daniel Golle <daniel@makrotopia.org>
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/dma.c | 16 ++++++++++------
 drivers/net/wireless/mediatek/mt76/dma.h |  1 +
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 33e47ea0368e..5629b949fac0 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -634,14 +634,17 @@ mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q,
 	return frames;
 }
 
-static int
-mt76_dma_wed_setup(struct mt76_dev *dev, struct mt76_queue *q)
+int mt76_dma_wed_setup(struct mt76_dev *dev, struct mt76_queue *q, bool reset)
 {
 #ifdef CONFIG_NET_MEDIATEK_SOC_WED
 	struct mtk_wed_device *wed = &dev->mmio.wed;
 	int ret, type, ring;
-	u8 flags = q->flags;
+	u8 flags;
+
+	if (!q || !q->ndesc)
+		return -EINVAL;
 
+	flags = q->flags;
 	if (!mtk_wed_device_active(wed))
 		q->flags &= ~MT_QFLAG_WED;
 
@@ -653,7 +656,7 @@ mt76_dma_wed_setup(struct mt76_dev *dev, struct mt76_queue *q)
 
 	switch (type) {
 	case MT76_WED_Q_TX:
-		ret = mtk_wed_device_tx_ring_setup(wed, ring, q->regs, false);
+		ret = mtk_wed_device_tx_ring_setup(wed, ring, q->regs, reset);
 		if (!ret)
 			q->wed_regs = wed->tx_ring[ring].reg_base;
 		break;
@@ -669,7 +672,7 @@ mt76_dma_wed_setup(struct mt76_dev *dev, struct mt76_queue *q)
 			q->wed_regs = wed->txfree_ring.reg_base;
 		break;
 	case MT76_WED_Q_RX:
-		ret = mtk_wed_device_rx_ring_setup(wed, ring, q->regs, false);
+		ret = mtk_wed_device_rx_ring_setup(wed, ring, q->regs, reset);
 		if (!ret)
 			q->wed_regs = wed->rx_ring[ring].reg_base;
 		break;
@@ -682,6 +685,7 @@ mt76_dma_wed_setup(struct mt76_dev *dev, struct mt76_queue *q)
 	return 0;
 #endif
 }
+EXPORT_SYMBOL_GPL(mt76_dma_wed_setup);
 
 static int
 mt76_dma_alloc_queue(struct mt76_dev *dev, struct mt76_queue *q,
@@ -712,7 +716,7 @@ mt76_dma_alloc_queue(struct mt76_dev *dev, struct mt76_queue *q,
 	if (ret)
 		return ret;
 
-	ret = mt76_dma_wed_setup(dev, q);
+	ret = mt76_dma_wed_setup(dev, q, false);
 	if (ret)
 		return ret;
 
diff --git a/drivers/net/wireless/mediatek/mt76/dma.h b/drivers/net/wireless/mediatek/mt76/dma.h
index 53c6ce2528b2..4b9bc7f462b8 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.h
+++ b/drivers/net/wireless/mediatek/mt76/dma.h
@@ -56,5 +56,6 @@ enum mt76_mcu_evt_type {
 int mt76_dma_rx_poll(struct napi_struct *napi, int budget);
 void mt76_dma_attach(struct mt76_dev *dev);
 void mt76_dma_cleanup(struct mt76_dev *dev);
+int mt76_dma_wed_setup(struct mt76_dev *dev, struct mt76_queue *q, bool reset);
 
 #endif
-- 
2.39.0

[PATCH 2/4] wifi: mt76: dma: reset wed queues in mt76_dma_rx_reset

[Lorenzo Bianconi]

From: Sujuan Chen <sujuan.chen@mediatek.com>

This is a preliminary patch to introduce proper wed reset support.

Tested-by: Daniel Golle <daniel@makrotopia.org>
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/dma.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 5629b949fac0..93c42082f1c2 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -766,8 +766,13 @@ mt76_dma_rx_reset(struct mt76_dev *dev, enum mt76_rxq_id qid)
 		q->desc[i].ctrl = cpu_to_le32(MT_DMA_CTL_DMA_DONE);
 
 	mt76_dma_rx_cleanup(dev, q);
-	mt76_dma_sync_idx(dev, q);
-	mt76_dma_rx_fill(dev, q, false);
+
+	/* reset WED rx queues */
+	mt76_dma_wed_setup(dev, q, true);
+	if (q->flags != MT_WED_Q_TXFREE) {
+		mt76_dma_sync_idx(dev, q);
+		mt76_dma_rx_fill(dev, q, false);
+	}
 }
 
 static void
-- 
2.39.0

[PATCH 3/4] wifi: mt76: mt7915: add mt7915 wed reset callbacks

[Lorenzo Bianconi]

Introduce mt7915_mmio_wed_reset_complete and
mt7915_mmio_wed_reset_complete callbacks and the related wait
queues in order to wait for wed reset completion during wlan reset.

Tested-by: Daniel Golle <daniel@makrotopia.org>
Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/net/wireless/mediatek/mt76/dma.c      |  2 +
 drivers/net/wireless/mediatek/mt76/mt76.h     |  3 ++
 .../net/wireless/mediatek/mt76/mt7915/dma.c   | 15 +++++++
 .../net/wireless/mediatek/mt76/mt7915/mmio.c  | 42 +++++++++++++++++++
 4 files changed, 62 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 93c42082f1c2..714becbbefea 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -922,6 +922,8 @@ mt76_dma_init(struct mt76_dev *dev,
 	snprintf(dev->napi_dev.name, sizeof(dev->napi_dev.name), "%s",
 		 wiphy_name(dev->hw->wiphy));
 	dev->napi_dev.threaded = 1;
+	init_completion(&dev->mmio.wed_reset);
+	init_completion(&dev->mmio.wed_reset_complete);
 
 	mt76_for_each_q_rx(dev, i) {
 		netif_napi_add(&dev->napi_dev, &dev->napi[i], poll);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index 9037780f9e88..8abc6ecd7b68 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -413,6 +413,7 @@ enum {
 	MT76_STATE_SUSPEND,
 	MT76_STATE_ROC,
 	MT76_STATE_PM,
+	MT76_STATE_WED_RESET,
 };
 
 struct mt76_hw_cap {
@@ -591,6 +592,8 @@ struct mt76_mmio {
 	u32 irqmask;
 
 	struct mtk_wed_device wed;
+	struct completion wed_reset;
+	struct completion wed_reset_complete;
 };
 
 struct mt76_rx_status {
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/dma.c b/drivers/net/wireless/mediatek/mt76/mt7915/dma.c
index e3fa064918bf..a956e2a0be4f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/dma.c
@@ -559,6 +559,20 @@ int mt7915_dma_init(struct mt7915_dev *dev, struct mt7915_phy *phy2)
 	return 0;
 }
 
+static void mt7915_dma_wed_reset(struct mt7915_dev *dev)
+{
+	struct mt76_dev *mdev = &dev->mt76;
+
+	if (!test_bit(MT76_STATE_WED_RESET, &dev->mphy.state))
+		return;
+
+	complete(&mdev->mmio.wed_reset);
+
+	if (!wait_for_completion_timeout(&dev->mt76.mmio.wed_reset_complete,
+					 3 * HZ))
+		dev_err(dev->mt76.dev, "wed reset complete timeout\n");
+}
+
 int mt7915_dma_reset(struct mt7915_dev *dev, bool force)
 {
 	struct mt76_phy *mphy_ext = dev->mt76.phys[MT_BAND1];
@@ -582,6 +596,7 @@ int mt7915_dma_reset(struct mt7915_dev *dev, bool force)
 		mt7915_wfsys_reset(dev);
 
 	mt7915_dma_disable(dev, force);
+	mt7915_dma_wed_reset(dev);
 
 	/* reset hw queues */
 	for (i = 0; i < __MT_TXQ_MAX; i++) {
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
index 76de0ca22c2a..cf2f66eaf3db 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
@@ -4,10 +4,12 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/rtnetlink.h>
 #include <linux/pci.h>
 
 #include "mt7915.h"
 #include "mac.h"
+#include "mcu.h"
 #include "../trace.h"
 #include "../dma.h"
 
@@ -695,6 +697,44 @@ static void mt7915_mmio_wed_update_rx_stats(struct mtk_wed_device *wed,
 
 	rcu_read_unlock();
 }
+
+static int mt7915_mmio_wed_reset(struct mtk_wed_device *wed)
+{
+	struct mt76_dev *mdev = container_of(wed, struct mt76_dev, mmio.wed);
+	struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76);
+	struct mt76_phy *mphy = &dev->mphy;
+	int ret;
+
+	ASSERT_RTNL();
+
+	if (test_and_set_bit(MT76_STATE_WED_RESET, &mphy->state))
+		return -EBUSY;
+
+	ret = mt7915_mcu_set_ser(dev, SER_RECOVER, SER_SET_RECOVER_L1,
+				 mphy->band_idx);
+	if (ret)
+		goto out;
+
+	rtnl_unlock();
+	if (!wait_for_completion_timeout(&mdev->mmio.wed_reset, 20 * HZ)) {
+		dev_err(mdev->dev, "wed reset timeout\n");
+		ret = -ETIMEDOUT;
+	}
+	rtnl_lock();
+out:
+	clear_bit(MT76_STATE_WED_RESET, &mphy->state);
+
+	return ret;
+}
+
+static int mt7915_mmio_wed_reset_complete(struct mtk_wed_device *wed)
+{
+	struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
+
+	complete(&dev->mmio.wed_reset_complete);
+
+	return 0;
+}
 #endif
 
 int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
@@ -777,6 +817,8 @@ int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
 	wed->wlan.init_rx_buf = mt7915_mmio_wed_init_rx_buf;
 	wed->wlan.release_rx_buf = mt7915_mmio_wed_release_rx_buf;
 	wed->wlan.update_wo_rx_stats = mt7915_mmio_wed_update_rx_stats;
+	wed->wlan.reset = mt7915_mmio_wed_reset;
+	wed->wlan.reset_complete = mt7915_mmio_wed_reset_complete;
 
 	dev->mt76.rx_token_size = wed->wlan.rx_npkt;
 
-- 
2.39.0

[PATCH 4/4] wifi: mt76: mt7915: complete wed reset support

[Lorenzo Bianconi]

Stop Wireless Ethernet Dispatcher during mt7915 reset procedure.

Tested-by: Daniel Golle <daniel@makrotopia.org>
Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../net/wireless/mediatek/mt76/mt7915/dma.c   | 30 +++++++++++++++----
 .../net/wireless/mediatek/mt76/mt7915/mac.c   |  6 ++++
 2 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/dma.c b/drivers/net/wireless/mediatek/mt76/mt7915/dma.c
index a956e2a0be4f..abe17dac9996 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/dma.c
@@ -573,9 +573,18 @@ static void mt7915_dma_wed_reset(struct mt7915_dev *dev)
 		dev_err(dev->mt76.dev, "wed reset complete timeout\n");
 }
 
+static void
+mt7915_dma_reset_tx_queue(struct mt7915_dev *dev, struct mt76_queue *q)
+{
+	mt76_queue_reset(dev, q);
+	if (mtk_wed_device_active(&dev->mt76.mmio.wed))
+		mt76_dma_wed_setup(&dev->mt76, q, true);
+}
+
 int mt7915_dma_reset(struct mt7915_dev *dev, bool force)
 {
 	struct mt76_phy *mphy_ext = dev->mt76.phys[MT_BAND1];
+	struct mtk_wed_device *wed = &dev->mt76.mmio.wed;
 	int i;
 
 	/* clean up hw queues */
@@ -595,29 +604,40 @@ int mt7915_dma_reset(struct mt7915_dev *dev, bool force)
 	if (force)
 		mt7915_wfsys_reset(dev);
 
+	if (mtk_wed_device_active(wed))
+		mtk_wed_device_dma_reset(wed);
+
 	mt7915_dma_disable(dev, force);
 	mt7915_dma_wed_reset(dev);
 
 	/* reset hw queues */
 	for (i = 0; i < __MT_TXQ_MAX; i++) {
-		mt76_queue_reset(dev, dev->mphy.q_tx[i]);
+		mt7915_dma_reset_tx_queue(dev, dev->mphy.q_tx[i]);
 		if (mphy_ext)
-			mt76_queue_reset(dev, mphy_ext->q_tx[i]);
+			mt7915_dma_reset_tx_queue(dev, mphy_ext->q_tx[i]);
 	}
 
 	for (i = 0; i < __MT_MCUQ_MAX; i++)
 		mt76_queue_reset(dev, dev->mt76.q_mcu[i]);
 
-	mt76_for_each_q_rx(&dev->mt76, i)
+	mt76_for_each_q_rx(&dev->mt76, i) {
+		if (dev->mt76.q_rx[i].flags == MT_WED_Q_TXFREE)
+			continue;
+
 		mt76_queue_reset(dev, &dev->mt76.q_rx[i]);
+	}
 
 	mt76_tx_status_check(&dev->mt76, true);
 
-	mt7915_dma_enable(dev);
-
 	mt76_for_each_q_rx(&dev->mt76, i)
 		mt76_queue_rx_reset(dev, i);
 
+	if (mtk_wed_device_active(wed) && is_mt7915(&dev->mt76))
+		mt76_rmw(dev, MT_WFDMA0_EXT0_CFG, MT_WFDMA0_EXT0_RXWB_KEEP,
+			 MT_WFDMA0_EXT0_RXWB_KEEP);
+
+	mt7915_dma_enable(dev);
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 65727ce6c29e..fb37b2a3274e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1581,6 +1581,12 @@ void mt7915_mac_reset_work(struct work_struct *work)
 	if (!(READ_ONCE(dev->recovery.state) & MT_MCU_CMD_STOP_DMA))
 		return;
 
+	if (mtk_wed_device_active(&dev->mt76.mmio.wed)) {
+		mtk_wed_device_stop(&dev->mt76.mmio.wed);
+		if (!is_mt7986(&dev->mt76))
+			mt76_wr(dev, MT_INT_WED_MASK_CSR, 0);
+	}
+
 	ieee80211_stop_queues(mt76_hw(dev));
 	if (ext_phy)
 		ieee80211_stop_queues(ext_phy->hw);
-- 
2.39.0