wifi: mt76: mt792x: add MT7902 WFDMA prefetch configuration

Configure the RX/TX ring prefetch setting for MT7902 PCIe device.

This is a prerequisite patch before enabling MT7902 PCIe support.

Co-developed-by: Xiong Huang <xiong.huang@mediatek.com>
Signed-off-by: Xiong Huang <xiong.huang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260219004007.19733-9-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
index 34f07bd3097df21015055ef688ff30eba77b4154..002aece857b240e0a96761b3b8eca583593e180d 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
@@ -103,6 +103,22 @@ static void mt792x_dma_prefetch(struct mt792x_dev *dev)
                mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x0400, 0x10));
                mt76_wr(dev, MT_WFDMA0_TX_RING15_EXT_CTRL, PREFETCH(0x0500, 0x4));
                mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x0540, 0x4));
+       } else if (is_mt7902(&dev->mt76)) {
+               /* rx ring */
+               mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0000, 0x4));
+               mt76_wr(dev, MT_WFDMA0_RX_RING1_EXT_CTRL, PREFETCH(0x0040, 0x4));
+               mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL, PREFETCH(0x0080, 0x4));
+               mt76_wr(dev, MT_WFDMA0_RX_RING3_EXT_CTRL, PREFETCH(0x00c0, 0x4));
+               /* tx ring */
+               mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, PREFETCH(0x0100, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING1_EXT_CTRL, PREFETCH(0x0140, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING2_EXT_CTRL, PREFETCH(0x0180, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x01c0, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING4_EXT_CTRL, PREFETCH(0x0200, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING5_EXT_CTRL, PREFETCH(0x0240, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING6_EXT_CTRL, PREFETCH(0x0280, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING15_EXT_CTRL, PREFETCH(0x02c0, 0x4));
+               mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x0300, 0x4));
        } else {
                /* rx ring */
                mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0, 0x4));