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From:   Shayne Chen <shayne.chen@mediatek.com>
To:     Felix Fietkau <nbd@nbd.name>
CC:     linux-wireless <linux-wireless@vger.kernel.org>,
        Lorenzo Bianconi <lorenzo.bianconi@redhat.com>,
        Ryder Lee <ryder.lee@mediatek.com>,
        Evelyn Tsai <evelyn.tsai@mediatek.com>,
        linux-mediatek <linux-mediatek@lists.infradead.org>,
        Shayne Chen <shayne.chen@mediatek.com>
Subject: [PATCH v3 4/4] mt76: mt7915: change max rx len limit of hw modules
Date:   Mon, 18 Oct 2021 16:09:41 +0800
Message-ID: <20211018080941.11443-4-shayne.chen@mediatek.com>
In-Reply-To: <20211018080941.11443-1-shayne.chen@mediatek.com>
References: <20211018080941.11443-1-shayne.chen@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Update max rx len of some hw modules, which aligns out vendor SDK.
In normal modes, we exchange MPDU 7991 cap with peers; however, this
won't play a part in sniffer mode.
To prevent packets which exceed the max MPDU size from entering specific
rx path in hw, we need to set a proper limit to filter them out.

Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7915/init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 274b30a58f05..b77647b4575e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -386,7 +386,7 @@ mt7915_mac_init_band(struct mt7915_dev *dev, u8 band)
 	      FIELD_PREP(MT_MDP_RCFR1_RX_DROPPED_MCAST, MT_MDP_TO_HIF);
 	mt76_rmw(dev, MT_MDP_BNRCFR1(band), mask, set);
 
-	mt76_rmw_field(dev, MT_DMA_DCR0(band), MT_DMA_DCR0_MAX_RX_LEN, 1536);
+	mt76_rmw_field(dev, MT_DMA_DCR0(band), MT_DMA_DCR0_MAX_RX_LEN, 0x680);
 	/* disable rx rate report by default due to hw issues */
 	mt76_clear(dev, MT_DMA_DCR0(band), MT_DMA_DCR0_RXD_G5_EN);
 }
@@ -395,7 +395,7 @@ static void mt7915_mac_init(struct mt7915_dev *dev)
 {
 	int i;
 
-	mt76_rmw_field(dev, MT_MDP_DCR1, MT_MDP_DCR1_MAX_RX_LEN, 1536);
+	mt76_rmw_field(dev, MT_MDP_DCR1, MT_MDP_DCR1_MAX_RX_LEN, 0x400);
 	/* enable hardware de-agg */
 	mt76_set(dev, MT_MDP_DCR0, MT_MDP_DCR0_DAMSDU_EN);
 
-- 
2.29.2