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From:   Felix Fietkau <nbd@nbd.name>
To:     linux-wireless@vger.kernel.org
Subject: [PATCH 1/3] mt76: mt7615: fix control frame rx in monitor mode
Date:   Thu, 26 Sep 2019 11:05:21 +0200
Message-Id: <20190926090523.68392-1-nbd@nbd.name>
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

Adjust filters and ensure frames don't get sent to MCU instead of host

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7615/init.c | 13 ++++++++++++-
 drivers/net/wireless/mediatek/mt76/mt7615/main.c | 10 ++++++++++
 drivers/net/wireless/mediatek/mt76/mt7615/regs.h | 16 ++++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/init.c b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
index 1104e4c8aaa6..5de04f6e6046 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
@@ -20,7 +20,7 @@ static void mt7615_phy_init(struct mt7615_dev *dev)
 
 static void mt7615_mac_init(struct mt7615_dev *dev)
 {
-	u32 val;
+	u32 val, mask, set;
 
 	/* enable band 0/1 clk */
 	mt76_set(dev, MT_CFG_CCR,
@@ -85,6 +85,17 @@ static void mt7615_mac_init(struct mt7615_dev *dev)
 		 MT_AGG_ARCR_RATE_DOWN_RATIO_EN |
 		 FIELD_PREP(MT_AGG_ARCR_RATE_DOWN_RATIO, 1) |
 		 FIELD_PREP(MT_AGG_ARCR_RATE_UP_EXTRA_TH, 4)));
+
+	mask = MT_DMA_RCFR0_MCU_RX_MGMT |
+	       MT_DMA_RCFR0_MCU_RX_CTL_NON_BAR |
+	       MT_DMA_RCFR0_MCU_RX_CTL_BAR |
+	       MT_DMA_RCFR0_MCU_RX_BYPASS |
+	       MT_DMA_RCFR0_RX_DROPPED_UCAST |
+	       MT_DMA_RCFR0_RX_DROPPED_MCAST;
+	set = FIELD_PREP(MT_DMA_RCFR0_RX_DROPPED_UCAST, 2) |
+	      FIELD_PREP(MT_DMA_RCFR0_RX_DROPPED_MCAST, 2);
+	mt76_rmw(dev, MT_DMA_BN0RCFR0, mask, set);
+	mt76_rmw(dev, MT_DMA_BN1RCFR0, mask, set);
 }
 
 static int mt7615_init_hardware(struct mt7615_dev *dev)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
index 87c748715b5d..be8130735a1e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
@@ -263,6 +263,11 @@ static void mt7615_configure_filter(struct ieee80211_hw *hw,
 				    u64 multicast)
 {
 	struct mt7615_dev *dev = hw->priv;
+	u32 ctl_flags = MT_WF_RFCR1_DROP_ACK |
+			MT_WF_RFCR1_DROP_BF_POLL |
+			MT_WF_RFCR1_DROP_BA |
+			MT_WF_RFCR1_DROP_CFEND |
+			MT_WF_RFCR1_DROP_CFACK;
 	u32 flags = 0;
 
 #define MT76_FILTER(_flag, _hw) do { \
@@ -296,6 +301,11 @@ static void mt7615_configure_filter(struct ieee80211_hw *hw,
 
 	*total_flags = flags;
 	mt76_wr(dev, MT_WF_RFCR, dev->mt76.rxfilter);
+
+	if (*total_flags & FIF_CONTROL)
+		mt76_clear(dev, MT_WF_RFCR1, ctl_flags);
+	else
+		mt76_set(dev, MT_WF_RFCR1, ctl_flags);
 }
 
 static void mt7615_bss_info_changed(struct ieee80211_hw *hw,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/regs.h b/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
index b193814d5cf8..8ecefcb19354 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
@@ -176,6 +176,13 @@
 #define MT_WF_RFCR_DROP_NDPA		BIT(20)
 #define MT_WF_RFCR_DROP_UNWANTED_CTL	BIT(21)
 
+#define MT_WF_RFCR1			MT_WF_RMAC(0x004)
+#define MT_WF_RFCR1_DROP_ACK		BIT(4)
+#define MT_WF_RFCR1_DROP_BF_POLL	BIT(5)
+#define MT_WF_RFCR1_DROP_BA		BIT(6)
+#define MT_WF_RFCR1_DROP_CFEND		BIT(7)
+#define MT_WF_RFCR1_DROP_CFACK		BIT(8)
+
 #define MT_WF_DMA_BASE			0x21800
 #define MT_WF_DMA(ofs)			(MT_WF_DMA_BASE + (ofs))
 
@@ -183,6 +190,15 @@
 #define MT_DMA_DCR0_MAX_RX_LEN		GENMASK(15, 2)
 #define MT_DMA_DCR0_RX_VEC_DROP		BIT(17)
 
+#define MT_DMA_BN0RCFR0			MT_WF_DMA(0x070)
+#define MT_DMA_BN1RCFR0			MT_WF_DMA(0x0b0)
+#define MT_DMA_RCFR0_MCU_RX_MGMT	BIT(2)
+#define MT_DMA_RCFR0_MCU_RX_CTL_NON_BAR	BIT(3)
+#define MT_DMA_RCFR0_MCU_RX_CTL_BAR	BIT(4)
+#define MT_DMA_RCFR0_MCU_RX_BYPASS	BIT(21)
+#define MT_DMA_RCFR0_RX_DROPPED_UCAST	GENMASK(25, 24)
+#define MT_DMA_RCFR0_RX_DROPPED_MCAST	GENMASK(27, 26)
+
 #define MT_WTBL_BASE			0x30000
 #define MT_WTBL_ENTRY_SIZE		256
 
-- 
2.17.0