From: Joshua Klinesmith <joshuaklinesmith@gmail.com>
To: linux-wireless@vger.kernel.org
Cc: nbd@nbd.name, lorenzo@kernel.org, ryder.lee@mediatek.com,
shayne.chen@mediatek.com, sean.wang@mediatek.com,
Joshua Klinesmith <joshuaklinesmith@gmail.com>
Subject: [PATCH wireless v3] wifi: mt76: mt7915: set AMSDU parameters for WED v3
Date: Mon, 6 Apr 2026 22:58:37 -0400 [thread overview]
Message-ID: <20260407025838.55455-1-joshuaklinesmith@gmail.com> (raw)
On MT7988 (WED version 3), the WED hardware unconditionally enables the
AMSDU aggregation engine. The engine uses wlan.amsdu_max_subframes and
wlan.amsdu_max_len to configure aggregation limits. The mt7996 driver
sets these to 8 and 1536 respectively, but the mt7915 driver never sets
them, leaving both at zero.
With the AMSDU engine active and zero-valued limits, the TX path is
severely throttled, capping throughput at approximately 6 Mbps on MT7916
PCIe cards attached to MT7988 SoCs.
Set amsdu_max_subframes and amsdu_max_len to the same values used by the
mt7996 driver.
Fixes: b230812b9dda ("net: ethernet: mtk_wed: introduce partial AMSDU offload support for MT7988")
Signed-off-by: Joshua Klinesmith <joshuaklinesmith@gmail.com>
---
drivers/net/wireless/mediatek/mt76/mt7915/mmio.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
index 2708b1556f40..f5fa81d3b264 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
@@ -719,6 +719,9 @@ int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
wed->wlan.reset = mt7915_mmio_wed_reset;
wed->wlan.reset_complete = mt76_wed_reset_complete;
+ wed->wlan.amsdu_max_subframes = 8;
+ wed->wlan.amsdu_max_len = 1536;
+
dev->mt76.rx_token_size = wed->wlan.rx_npkt;
if (mtk_wed_device_attach(wed))
--
2.43.0
reply other threads:[~2026-04-07 2:58 UTC|newest]
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