From: Sean Wang Date: Thu, 19 Feb 2026 00:40:05 +0000 (-0600) Subject: wifi: mt76: mt792x: add MT7902 WFDMA prefetch configuration X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=199443b4015238f46c8a578b84c3834a48246355;p=thirdparty%2Flinux.git 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 Signed-off-by: Xiong Huang Signed-off-by: Sean Wang Link: https://patch.msgid.link/20260219004007.19733-9-sean.wang@kernel.org Signed-off-by: Felix Fietkau --- diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c index 34f07bd3097df..002aece857b24 100644 --- 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));