mediatek: fix WED + wifi reset

The WLAN + WED reset sequence relies on being able to receive interrupts from
the card, in order to synchronize individual steps with the firmware.
When WED is stopped, leave interrupts running and rely on the driver turning
off unwanted ones.
WED DMA also needs to be disabled before resetting.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit 2c5b3bee38eb0d76f5afe90f9969b73e19d28685)

5 files changed, 51 insertions, 2 deletions

diff --git a/target/linux/generic/backport-5.15/753-v6.9-net-ethernet-mtk_eth_soc-fix-WED-wifi-reset.patch b/target/linux/generic/backport-5.15/753-v6.9-net-ethernet-mtk_eth_soc-fix-WED-wifi-reset.patch
new file mode 100644
index 0000000000..71ae446033
--- /dev/null
+++ b/target/linux/generic/backport-5.15/753-v6.9-net-ethernet-mtk_eth_soc-fix-WED-wifi-reset.patch
@@ -0,0 +1,49 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 18 Jan 2024 12:51:32 +0100
+Subject: [PATCH] net: ethernet: mtk_eth_soc: fix WED + wifi reset
+
+The WLAN + WED reset sequence relies on being able to receive interrupts from
+the card, in order to synchronize individual steps with the firmware.
+When WED is stopped, leave interrupts running and rely on the driver turning
+off unwanted ones.
+WED DMA also needs to be disabled before resetting.
+
+Fixes: f78cd9c783e0 ("net: ethernet: mtk_wed: update mtk_wed_stop")
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/ethernet/mediatek/mtk_wed.c
++++ b/drivers/net/ethernet/mediatek/mtk_wed.c
+@@ -1073,13 +1073,13 @@ mtk_wed_dma_disable(struct mtk_wed_devic
+ static void
+ mtk_wed_stop(struct mtk_wed_device *dev)
+ {
++	mtk_wed_dma_disable(dev);
+ 	mtk_wed_set_ext_int(dev, false);
+ 
+ 	wed_w32(dev, MTK_WED_WPDMA_INT_TRIGGER, 0);
+ 	wed_w32(dev, MTK_WED_WDMA_INT_TRIGGER, 0);
+ 	wdma_w32(dev, MTK_WDMA_INT_MASK, 0);
+ 	wdma_w32(dev, MTK_WDMA_INT_GRP2, 0);
+-	wed_w32(dev, MTK_WED_WPDMA_INT_MASK, 0);
+ 
+ 	if (!mtk_wed_get_rx_capa(dev))
+ 		return;
+@@ -1092,7 +1092,6 @@ static void
+ mtk_wed_deinit(struct mtk_wed_device *dev)
+ {
+ 	mtk_wed_stop(dev);
+-	mtk_wed_dma_disable(dev);
+ 
+ 	wed_clr(dev, MTK_WED_CTRL,
+ 		MTK_WED_CTRL_WDMA_INT_AGENT_EN |
+@@ -2604,9 +2603,6 @@ mtk_wed_irq_get(struct mtk_wed_device *d
+ static void
+ mtk_wed_irq_set_mask(struct mtk_wed_device *dev, u32 mask)
+ {
+-	if (!dev->running)
+-		return;
+-
+ 	mtk_wed_set_ext_int(dev, !!mask);
+ 	wed_w32(dev, MTK_WED_INT_MASK, mask);
+ }
diff --git a/target/linux/generic/backport-5.15/752-25-v6.10-net-ethernet-mtk_eth_soc-handle-dma-buffer-size-soc-.patch b/target/linux/generic/backport-5.15/754-25-v6.10-net-ethernet-mtk_eth_soc-handle-dma-buffer-size-soc-.patch
index 7a98ad5999..7a98ad5999 100644
--- a/target/linux/generic/backport-5.15/752-25-v6.10-net-ethernet-mtk_eth_soc-handle-dma-buffer-size-soc-.patch
+++ b/target/linux/generic/backport-5.15/754-25-v6.10-net-ethernet-mtk_eth_soc-handle-dma-buffer-size-soc-.patch
diff --git a/target/linux/generic/backport-5.15/752-29-v6.10-net-ethernet-mtk_ppe-Change-PPE-entries-number-to-16.patch b/target/linux/generic/backport-5.15/754-29-v6.10-net-ethernet-mtk_ppe-Change-PPE-entries-number-to-16.patch
index c6b332f370..c6b332f370 100644
--- a/target/linux/generic/backport-5.15/752-29-v6.10-net-ethernet-mtk_ppe-Change-PPE-entries-number-to-16.patch
+++ b/target/linux/generic/backport-5.15/754-29-v6.10-net-ethernet-mtk_ppe-Change-PPE-entries-number-to-16.patch
diff --git a/target/linux/generic/backport-5.15/752-30-v6.10-net-ethernet-mtk_eth_soc-implement-.-get-set-_pausep.patch b/target/linux/generic/backport-5.15/754-30-v6.10-net-ethernet-mtk_eth_soc-implement-.-get-set-_pausep.patch
index 1045e4d5f8..1045e4d5f8 100644
--- a/target/linux/generic/backport-5.15/752-30-v6.10-net-ethernet-mtk_eth_soc-implement-.-get-set-_pausep.patch
+++ b/target/linux/generic/backport-5.15/754-30-v6.10-net-ethernet-mtk_eth_soc-implement-.-get-set-_pausep.patch
diff --git a/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch b/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch
index abb6591b7d..0701743ffb 100644
--- a/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch
+++ b/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch
@@ -22,7 +22,7 @@ Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
 
 --- a/drivers/net/ethernet/mediatek/mtk_wed.c
 +++ b/drivers/net/ethernet/mediatek/mtk_wed.c
-@@ -1322,6 +1322,24 @@ mtk_wed_rro_alloc(struct mtk_wed_device
+@@ -1321,6 +1321,24 @@ mtk_wed_rro_alloc(struct mtk_wed_device
  	struct device_node *np;
  	int index;
  
@@ -47,7 +47,7 @@ Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  	index = of_property_match_string(dev->hw->node, "memory-region-names",
  					 "wo-dlm");
  	if (index < 0)
-@@ -1338,6 +1356,7 @@ mtk_wed_rro_alloc(struct mtk_wed_device
+@@ -1337,6 +1355,7 @@ mtk_wed_rro_alloc(struct mtk_wed_device
  		return -ENODEV;
  
  	dev->rro.miod_phys = rmem->base;