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mediatek: fix WED + wifi reset

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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>
This commit is contained in:
Felix Fietkau 2024-01-19 14:48:05 +01:00
parent a28cedbdab
commit 2c5b3bee38
2 changed files with 98 additions and 0 deletions
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49
target/linux/mediatek/patches-5.15/963-net-ethernet-mtk_eth_soc-fix-WED-wifi-reset.patch Normal file
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@ -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
@@ -1071,13 +1071,13 @@ 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;
@@ -1090,7 +1090,6 @@ 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 |
@@ -2621,9 +2620,6 @@ 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);
}

49
target/linux/mediatek/patches-6.1/963-net-ethernet-mtk_eth_soc-fix-WED-wifi-reset.patch Normal file
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@ -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
@@ -1071,13 +1071,13 @@ 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;
@@ -1090,7 +1090,6 @@ 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 |
@@ -2621,9 +2620,6 @@ 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);
}