[PATCH wireless v3] wifi: mt76: mt7915: set AMSDU parameters for WED v3

[PATCH wireless v3] wifi: mt76: mt7915: set AMSDU parameters for WED v3

[Joshua Klinesmith]

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