linux-kernel - [PATCH 6.8 243/715] wifi: mt76: mt7925: update PCIe DMA settings

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Message-ID: <20240324223455.1342824-244-sashal@kernel.org>
Date: Sun, 24 Mar 2024 18:27:02 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Deren Wu <deren.wu@...iatek.com>,
	Ming Yen Hsieh <mingyen.hsieh@...iatek.com>,
	Felix Fietkau <nbd@....name>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.8 243/715] wifi: mt76: mt7925: update PCIe DMA settings

From: Deren Wu <deren.wu@...iatek.com>

[ Upstream commit 0844947ccf64ea45edf6619ae2ba6dd9098b3308 ]

Fix the wrong WFDMA settings to improve TX performance.

Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Signed-off-by: Deren Wu <deren.wu@...iatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@...iatek.com>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/mediatek/mt76/mt792x_dma.c  | 13 ++++++++++---
 drivers/net/wireless/mediatek/mt76/mt792x_regs.h |  5 +++++
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
index 488326ce5ed4d..8fa36b59e738d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
@@ -123,14 +123,13 @@ static void mt792x_dma_prefetch(struct mt792x_dev *dev)
 
 int mt792x_dma_enable(struct mt792x_dev *dev)
 {
-	if (is_mt7925(&dev->mt76))
-		mt76_rmw(dev, MT_UWFDMA0_GLO_CFG_EXT1, BIT(28), BIT(28));
-
 	/* configure perfetch settings */
 	mt792x_dma_prefetch(dev);
 
 	/* reset dma idx */
 	mt76_wr(dev, MT_WFDMA0_RST_DTX_PTR, ~0);
+	if (is_mt7925(&dev->mt76))
+		mt76_wr(dev, MT_WFDMA0_RST_DRX_PTR, ~0);
 
 	/* configure delay interrupt */
 	mt76_wr(dev, MT_WFDMA0_PRI_DLY_INT_CFG0, 0);
@@ -140,12 +139,20 @@ int mt792x_dma_enable(struct mt792x_dev *dev)
 		 MT_WFDMA0_GLO_CFG_FIFO_LITTLE_ENDIAN |
 		 MT_WFDMA0_GLO_CFG_CLK_GAT_DIS |
 		 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
+		 FIELD_PREP(MT_WFDMA0_GLO_CFG_DMA_SIZE, 3) |
+		 MT_WFDMA0_GLO_CFG_FIFO_DIS_CHECK |
+		 MT_WFDMA0_GLO_CFG_RX_WB_DDONE |
 		 MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
 		 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);
 
 	mt76_set(dev, MT_WFDMA0_GLO_CFG,
 		 MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
 
+	if (is_mt7925(&dev->mt76)) {
+		mt76_rmw(dev, MT_UWFDMA0_GLO_CFG_EXT1, BIT(28), BIT(28));
+		mt76_set(dev, MT_WFDMA0_INT_RX_PRI, 0x0F00);
+		mt76_set(dev, MT_WFDMA0_INT_TX_PRI, 0x7F00);
+	}
 	mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
 
 	/* enable interrupts for TX/RX rings */
diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_regs.h b/drivers/net/wireless/mediatek/mt76/mt792x_regs.h
index d7f9b24cd665f..458cfd0260b13 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x_regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_regs.h
@@ -292,9 +292,12 @@
 #define MT_WFDMA0_GLO_CFG_TX_DMA_BUSY	BIT(1)
 #define MT_WFDMA0_GLO_CFG_RX_DMA_EN	BIT(2)
 #define MT_WFDMA0_GLO_CFG_RX_DMA_BUSY	BIT(3)
+#define MT_WFDMA0_GLO_CFG_DMA_SIZE	GENMASK(5, 4)
 #define MT_WFDMA0_GLO_CFG_TX_WB_DDONE	BIT(6)
 #define MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL BIT(9)
+#define MT_WFDMA0_GLO_CFG_FIFO_DIS_CHECK	BIT(11)
 #define MT_WFDMA0_GLO_CFG_FIFO_LITTLE_ENDIAN	BIT(12)
+#define MT_WFDMA0_GLO_CFG_RX_WB_DDONE	BIT(13)
 #define MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN BIT(15)
 #define MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2	BIT(21)
 #define MT_WFDMA0_GLO_CFG_OMIT_RX_INFO	BIT(27)
@@ -322,6 +325,8 @@
 
 #define MT_WFDMA0_RST_DTX_PTR		MT_WFDMA0(0x20c)
 #define MT_WFDMA0_RST_DRX_PTR		MT_WFDMA0(0x280)
+#define MT_WFDMA0_INT_RX_PRI		MT_WFDMA0(0x298)
+#define MT_WFDMA0_INT_TX_PRI		MT_WFDMA0(0x29c)
 #define MT_WFDMA0_GLO_CFG_EXT0		MT_WFDMA0(0x2b0)
 #define MT_WFDMA0_CSR_TX_DMASHDL_ENABLE	BIT(6)
 #define MT_WFDMA0_PRI_DLY_INT_CFG0	MT_WFDMA0(0x2f0)
-- 
2.43.0