From 0f4b3763251928d5b275289b651e0e924306b255 Mon Sep 17 00:00:00 2001
From: Bo Jiao <Bo.Jiao@mediatek.com>
Date: Mon, 6 Jun 2022 20:13:02 +0800
Subject: [PATCH 1002/1009] mt76: mt7915: csi: implement csi support

---
 mt76_connac_mcu.h |   2 +
 mt7915/Makefile   |   4 +-
 mt7915/init.c     |  39 ++++
 mt7915/mcu.c      | 111 ++++++++++++
 mt7915/mcu.h      |  76 ++++++++
 mt7915/mt7915.h   |  20 ++
 mt7915/vendor.c   | 452 ++++++++++++++++++++++++++++++++++++++++++++++
 mt7915/vendor.h   |  60 ++++++
 8 files changed, 762 insertions(+), 2 deletions(-)
 create mode 100644 mt7915/vendor.c
 create mode 100644 mt7915/vendor.h

diff --git a/mt76_connac_mcu.h b/mt76_connac_mcu.h
index 9d0d6130..26e7cf6f 100644
--- a/mt76_connac_mcu.h
+++ b/mt76_connac_mcu.h
@@ -998,6 +998,7 @@ enum {
 	MCU_EXT_EVENT_CSA_NOTIFY = 0x4f,
 	MCU_EXT_EVENT_BCC_NOTIFY = 0x75,
 	MCU_EXT_EVENT_MURU_CTRL = 0x9f,
+	MCU_EXT_EVENT_CSI_REPORT = 0xc2,
 };
 
 /* unified event table */
@@ -1191,6 +1192,7 @@ enum {
 	MCU_EXT_CMD_GROUP_PRE_CAL_INFO = 0xab,
 	MCU_EXT_CMD_DPD_PRE_CAL_INFO = 0xac,
 	MCU_EXT_CMD_PHY_STAT_INFO = 0xad,
+	MCU_EXT_CMD_CSI_CTRL = 0xc2,
 };
 
 enum {
diff --git a/mt7915/Makefile b/mt7915/Makefile
index a42866e9..14ce98a6 100644
--- a/mt7915/Makefile
+++ b/mt7915/Makefile
@@ -1,9 +1,9 @@
 # SPDX-License-Identifier: ISC
-
+EXTRA_CFLAGS += -DCONFIG_MTK_VENDOR
 obj-$(CONFIG_MT7915E) += mt7915e.o
 
 mt7915e-y := pci.o init.o dma.o eeprom.o main.o mcu.o mac.o \
-	     debugfs.o mmio.o mtk_debugfs.o mtk_mcu.o
+	     debugfs.o mmio.o mtk_debugfs.o mtk_mcu.o vendor.o
 
 mt7915e-$(CONFIG_NL80211_TESTMODE) += testmode.o
 mt7915e-$(CONFIG_MT7986_WMAC) += soc.o
diff --git a/mt7915/init.c b/mt7915/init.c
index b23a2fb8..844a92f8 100644
--- a/mt7915/init.c
+++ b/mt7915/init.c
@@ -658,6 +658,12 @@ mt7915_register_ext_phy(struct mt7915_dev *dev, struct mt7915_phy *phy)
 	/* init wiphy according to mphy and phy */
 	mt7915_init_wiphy(phy);
 
+#ifdef CONFIG_MTK_VENDOR
+	INIT_LIST_HEAD(&phy->csi.csi_list);
+	spin_lock_init(&phy->csi.csi_lock);
+	mt7915_vendor_register(phy);
+#endif
+
 	ret = mt76_register_phy(mphy, true, mt76_rates,
 				ARRAY_SIZE(mt76_rates));
 	if (ret)
@@ -1164,6 +1170,25 @@ void mt7915_set_stream_he_caps(struct mt7915_phy *phy)
 	}
 }
 
+#ifdef CONFIG_MTK_VENDOR
+static int mt7915_unregister_features(struct mt7915_phy *phy)
+{
+	struct csi_data *c, *tmp_c;
+
+	spin_lock_bh(&phy->csi.csi_lock);
+	phy->csi.enable = 0;
+
+	list_for_each_entry_safe(c, tmp_c, &phy->csi.csi_list, node) {
+		list_del(&c->node);
+		kfree(c);
+	}
+	spin_unlock_bh(&phy->csi.csi_lock);
+
+
+	return 0;
+}
+#endif
+
 static void mt7915_unregister_ext_phy(struct mt7915_dev *dev)
 {
 	struct mt7915_phy *phy = mt7915_ext_phy(dev);
@@ -1172,6 +1197,10 @@ static void mt7915_unregister_ext_phy(struct mt7915_dev *dev)
 	if (!phy)
 		return;
 
+#ifdef CONFIG_MTK_VENDOR
+	mt7915_unregister_features(phy);
+#endif
+
 	mt7915_unregister_thermal(phy);
 	mt76_unregister_phy(mphy);
 	ieee80211_free_hw(mphy->hw);
@@ -1184,6 +1213,10 @@ static void mt7915_stop_hardware(struct mt7915_dev *dev)
 	mt7915_dma_cleanup(dev);
 	tasklet_disable(&dev->irq_tasklet);
 
+#ifdef CONFIG_MTK_VENDOR
+	mt7915_unregister_features(&dev->phy);
+#endif
+
 	if (is_mt7986(&dev->mt76))
 		mt7986_wmac_disable(dev);
 }
@@ -1224,6 +1257,12 @@ int mt7915_register_device(struct mt7915_dev *dev)
 	dev->mt76.test_ops = &mt7915_testmode_ops;
 #endif
 
+#ifdef CONFIG_MTK_VENDOR
+	INIT_LIST_HEAD(&dev->phy.csi.csi_list);
+	spin_lock_init(&dev->phy.csi.csi_lock);
+	mt7915_vendor_register(&dev->phy);
+#endif
+
 	ret = mt76_register_device(&dev->mt76, true, mt76_rates,
 				   ARRAY_SIZE(mt76_rates));
 	if (ret)
diff --git a/mt7915/mcu.c b/mt7915/mcu.c
index 644e6a8f..788f3fbf 100644
--- a/mt7915/mcu.c
+++ b/mt7915/mcu.c
@@ -36,6 +36,10 @@ static bool sr_scene_detect = true;
 module_param(sr_scene_detect, bool, 0644);
 MODULE_PARM_DESC(sr_scene_detect, "Enable firmware scene detection algorithm");
 
+#ifdef CONFIG_MTK_VENDOR
+static int mt7915_mcu_report_csi(struct mt7915_dev *dev, struct sk_buff *skb);
+#endif
+
 static u8
 mt7915_mcu_get_sta_nss(u16 mcs_map)
 {
@@ -371,6 +375,11 @@ mt7915_mcu_rx_ext_event(struct mt7915_dev *dev, struct sk_buff *skb)
 	case MCU_EXT_EVENT_FW_LOG_2_HOST:
 		mt7915_mcu_rx_log_message(dev, skb);
 		break;
+#ifdef CONFIG_MTK_VENDOR
+	case MCU_EXT_EVENT_CSI_REPORT:
+		mt7915_mcu_report_csi(dev, skb);
+		break;
+#endif
 	case MCU_EXT_EVENT_BCC_NOTIFY:
 		mt7915_mcu_rx_bcc_notify(dev, skb);
 		break;
@@ -3775,6 +3784,108 @@ int mt7915_mcu_twt_agrt_update(struct mt7915_dev *dev,
 				 &req, sizeof(req), true);
 }
 
+#ifdef CONFIG_MTK_VENDOR
+int mt7915_mcu_set_csi(struct mt7915_phy *phy, u8 mode,
+			u8 cfg, u8 v1, u32 v2, u8 *mac_addr)
+{
+	struct mt7915_dev *dev = phy->dev;
+	struct mt7915_mcu_csi req = {
+		.band = phy != &dev->phy,
+		.mode = mode,
+		.cfg = cfg,
+		.v1 = v1,
+		.v2 = cpu_to_le32(v2),
+	};
+
+	if (is_valid_ether_addr(mac_addr))
+		ether_addr_copy(req.mac_addr, mac_addr);
+
+	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD(CSI_CTRL), &req,
+				 sizeof(req), false);
+}
+
+static int
+mt7915_mcu_report_csi(struct mt7915_dev *dev, struct sk_buff *skb)
+{
+	struct mt76_connac2_mcu_rxd *rxd = (struct mt76_connac2_mcu_rxd *)skb->data;
+	struct mt7915_phy *phy = &dev->phy;
+	struct mt7915_mcu_csi_report *cr;
+	struct csi_data *csi;
+	int len, i;
+
+	skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
+
+	len = le16_to_cpu(rxd->len) - sizeof(struct mt76_connac2_mcu_rxd) + 24;
+	if (len < sizeof(*cr))
+		return -EINVAL;
+
+	cr = (struct mt7915_mcu_csi_report *)skb->data;
+
+	if (phy->csi.interval &&
+	    le32_to_cpu(cr->ts) < phy->csi.last_record + phy->csi.interval)
+		return 0;
+
+	csi = kzalloc(sizeof(*csi), GFP_KERNEL);
+	if (!csi)
+		return -ENOMEM;
+
+#define SET_CSI_DATA(_field)	csi->_field = le32_to_cpu(cr->_field)
+	SET_CSI_DATA(ch_bw);
+	SET_CSI_DATA(rssi);
+	SET_CSI_DATA(snr);
+	SET_CSI_DATA(data_num);
+	SET_CSI_DATA(data_bw);
+	SET_CSI_DATA(pri_ch_idx);
+	SET_CSI_DATA(info);
+	SET_CSI_DATA(rx_mode);
+	SET_CSI_DATA(h_idx);
+	SET_CSI_DATA(ts);
+
+	SET_CSI_DATA(band);
+	if (csi->band && !phy->mt76->band_idx)
+		phy = mt7915_ext_phy(dev);
+#undef SET_CSI_DATA
+
+	for (i = 0; i < csi->data_num; i++) {
+		csi->data_i[i] = le16_to_cpu(cr->data_i[i]);
+		csi->data_q[i] = le16_to_cpu(cr->data_q[i]);
+	}
+
+	memcpy(csi->ta, cr->ta, ETH_ALEN);
+	csi->tx_idx = le32_get_bits(cr->trx_idx, GENMASK(31, 16));
+	csi->rx_idx = le32_get_bits(cr->trx_idx, GENMASK(15, 0));
+
+	INIT_LIST_HEAD(&csi->node);
+	spin_lock_bh(&phy->csi.csi_lock);
+
+	if (!phy->csi.enable) {
+		kfree(csi);
+		spin_unlock_bh(&phy->csi.csi_lock);
+		return 0;
+	}
+
+	list_add_tail(&csi->node, &phy->csi.csi_list);
+	phy->csi.count++;
+
+	if (phy->csi.count > CSI_MAX_BUF_NUM) {
+		struct csi_data *old;
+
+		old = list_first_entry(&phy->csi.csi_list,
+				       struct csi_data, node);
+
+		list_del(&old->node);
+		kfree(old);
+		phy->csi.count--;
+	}
+
+	if (csi->h_idx & BIT(15)) /* last chain */
+		phy->csi.last_record = csi->ts;
+	spin_unlock_bh(&phy->csi.csi_lock);
+
+	return 0;
+}
+#endif
+
 #ifdef MTK_DEBUG
 int mt7915_dbg_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3, bool wait_resp)
 {
diff --git a/mt7915/mcu.h b/mt7915/mcu.h
index aa89106e..f3dedd5b 100644
--- a/mt7915/mcu.h
+++ b/mt7915/mcu.h
@@ -532,4 +532,80 @@ mt7915_get_power_bound(struct mt7915_phy *phy, s8 txpower)
 	return txpower;
 }
 
+#ifdef CONFIG_MTK_VENDOR
+struct mt7915_mcu_csi {
+	u8 band;
+	u8 mode;
+	u8 cfg;
+	u8 v1;
+	__le32 v2;
+	u8 mac_addr[ETH_ALEN];
+	u8 _rsv[34];
+} __packed;
+
+struct csi_tlv {
+	__le32 tag;
+	__le32 len;
+} __packed;
+
+#define CSI_MAX_COUNT	256
+#define CSI_MAX_BUF_NUM	3000
+
+struct mt7915_mcu_csi_report {
+	struct csi_tlv _t0;
+	__le32 ver;
+	struct csi_tlv _t1;
+	__le32 ch_bw;
+	struct csi_tlv _t2;
+	__le32 rssi;
+	struct csi_tlv _t3;
+	__le32 snr;
+	struct csi_tlv _t4;
+	__le32 band;
+	struct csi_tlv _t5;
+	__le32 data_num;
+	struct csi_tlv _t6;
+	__le16 data_i[CSI_MAX_COUNT];
+	struct csi_tlv _t7;
+	__le16 data_q[CSI_MAX_COUNT];
+	struct csi_tlv _t8;
+	__le32 data_bw;
+	struct csi_tlv _t9;
+	__le32 pri_ch_idx;
+	struct csi_tlv _t10;
+	u8 ta[8];
+	struct csi_tlv _t11;
+	__le32 info;
+	struct csi_tlv _t12;
+	__le32 rx_mode;
+	struct csi_tlv _t17;
+	__le32 h_idx;
+	struct csi_tlv _t18;
+	__le32 trx_idx;
+	struct csi_tlv _t19;
+	__le32 ts;
+} __packed;
+
+struct csi_data {
+	u8 ch_bw;
+	u16 data_num;
+	s16 data_i[CSI_MAX_COUNT];
+	s16 data_q[CSI_MAX_COUNT];
+	u8 band;
+	s8 rssi;
+	u8 snr;
+	u32 ts;
+	u8 data_bw;
+	u8 pri_ch_idx;
+	u8 ta[ETH_ALEN];
+	u32 info;
+	u8 rx_mode;
+	u32 h_idx;
+	u16 tx_idx;
+	u16 rx_idx;
+
+	struct list_head node;
+};
+#endif
+
 #endif
diff --git a/mt7915/mt7915.h b/mt7915/mt7915.h
index afe2ec7a..53e13151 100644
--- a/mt7915/mt7915.h
+++ b/mt7915/mt7915.h
@@ -293,6 +293,20 @@ struct mt7915_phy {
 		u8 spe_idx;
 	} test;
 #endif
+
+#ifdef CONFIG_MTK_VENDOR
+	struct {
+		struct list_head csi_list;
+		spinlock_t csi_lock;
+		u32 count;
+		bool mask;
+		bool reorder;
+		bool enable;
+
+		u32 interval;
+		u32 last_record;
+	} csi;
+#endif
 };
 
 struct mt7915_dev {
@@ -674,6 +688,12 @@ void mt7915_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
 			 bool pci, int *irq);
 
+#ifdef CONFIG_MTK_VENDOR
+void mt7915_vendor_register(struct mt7915_phy *phy);
+int mt7915_mcu_set_csi(struct mt7915_phy *phy, u8 mode,
+			u8 cfg, u8 v1, u32 v2, u8 *mac_addr);
+#endif
+
 #ifdef MTK_DEBUG
 int mt7915_mtk_init_debugfs(struct mt7915_phy *phy, struct dentry *dir);
 int mt7915_dbg_mcu_wa_cmd(struct mt7915_dev *dev, int cmd, u32 a1, u32 a2, u32 a3, bool wait_resp);
diff --git a/mt7915/vendor.c b/mt7915/vendor.c
new file mode 100644
index 00000000..98fd9c2d
--- /dev/null
+++ b/mt7915/vendor.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2020, MediaTek Inc. All rights reserved.
+ */
+
+#include <net/netlink.h>
+
+#include "mt7915.h"
+#include "mcu.h"
+#include "vendor.h"
+
+static const struct nla_policy
+csi_ctrl_policy[NUM_MTK_VENDOR_ATTRS_CSI_CTRL] = {
+	[MTK_VENDOR_ATTR_CSI_CTRL_CFG] = {.type = NLA_NESTED },
+	[MTK_VENDOR_ATTR_CSI_CTRL_CFG_MODE] = { .type = NLA_U8 },
+	[MTK_VENDOR_ATTR_CSI_CTRL_CFG_TYPE] = { .type = NLA_U8 },
+	[MTK_VENDOR_ATTR_CSI_CTRL_CFG_VAL1] = { .type = NLA_U8 },
+	[MTK_VENDOR_ATTR_CSI_CTRL_CFG_VAL2] = { .type = NLA_U8 },
+	[MTK_VENDOR_ATTR_CSI_CTRL_MAC_ADDR] = { .type = NLA_NESTED },
+	[MTK_VENDOR_ATTR_CSI_CTRL_INTERVAL] = { .type = NLA_U32 },
+	[MTK_VENDOR_ATTR_CSI_CTRL_DUMP_NUM] = { .type = NLA_U16 },
+	[MTK_VENDOR_ATTR_CSI_CTRL_DATA] = { .type = NLA_NESTED },
+};
+
+struct csi_null_tone {
+	u8 start;
+	u8 end;
+};
+
+struct csi_reorder{
+	u8 dest;
+	u8 start;
+	u8 end;
+};
+
+struct csi_mask {
+	struct csi_null_tone null[10];
+	u8 pilot[8];
+	struct csi_reorder ro[3];
+};
+
+static const struct csi_mask csi_mask_groups[] = {
+	/* OFDM */
+	{ .null = { { 0 }, { 27, 37 } },
+	  .ro = { {0, 0, 63} },
+	},
+	{ .null = { { 0, 69 }, { 96 }, { 123, 127 } },
+	  .ro = { { 0, 96 }, { 38, 70, 95 }, { 1, 97, 122 } },
+	},
+	{ .null = { { 0, 5 }, { 32 }, { 59, 127 } },
+	  .ro = { { 0, 32 }, { 38, 6, 31 }, { 1, 33, 58 } },
+	},
+	{ .null = { { 0, 5 }, { 32 }, { 59, 69 }, { 96 }, { 123, 127 } },
+	  .ro = { { 0, 0, 127 } },
+	},
+	{ .null = { { 0, 133 }, { 160 }, { 187, 255 } },
+	  .ro = { { 0, 160 }, { 1, 161, 186 }, { 38, 134, 159 } },
+	},
+	{ .null = { { 0, 197 }, { 224 }, { 251, 255 } },
+	  .ro = { { 0, 224 }, { 1, 225, 250 }, { 38, 198, 223 } },
+	},
+	{ .null = { { 0, 5 }, { 32 }, { 59, 255 } },
+	  .ro = { { 0, 32 }, { 1, 33, 58 }, { 38, 6, 31 } },
+	},
+	{ .null = { { 0, 69 }, { 96 }, { 123, 255 } },
+	  .ro = { { 0, 96 }, { 1, 97, 122 }, { 38, 70, 95 } },
+	},
+	{ .null = { { 0, 133 }, { 160 }, { 187, 197 }, { 224 }, { 251, 255 } },
+	  .ro = { { 0, 192 }, { 2, 198, 250 }, { 74, 134, 186 } },
+	},
+	{ .null = { { 0, 5 }, { 32 }, { 59, 69 }, { 96 }, { 123, 255 } },
+	  .ro = { { 0, 64 }, { 2, 70, 122 }, { 74, 6, 58 } },
+	},
+	{ .null = { { 0, 5 }, { 32 }, { 59, 69 }, { 96 }, { 123, 133 },
+		    { 160 }, { 187, 197 }, { 224 }, { 251, 255 } },
+	  .ro = { { 0, 0, 255 } },
+	},
+
+	/* HT/VHT */
+	{ .null = { { 0 }, { 29, 35 } },
+	  .pilot = { 7, 21, 43, 57 },
+	  .ro = { { 0, 0, 63 } },
+	},
+	{ .null = { { 0, 67 }, { 96 }, { 125, 127 } },
+	  .pilot = { 75, 89, 103, 117 },
+	  .ro = { { 0, 96 }, { 36, 68, 95 }, { 1, 97, 124 } },
+	},
+	{ .null = { { 0, 3 }, { 32 }, { 61, 127 } },
+	  .pilot = { 11, 25, 39, 53 },
+	  .ro = { { 0, 32 }, { 36, 4, 31 }, { 1, 33, 60 } },
+	},
+	{ .null = { { 0, 1 }, { 59, 69 }, { 127 } },
+	  .pilot = { 11, 25, 53, 75, 103, 117 },
+	  .ro = { { 0, 0, 127 } },
+	},
+	{ .null = { { 0, 131 }, { 160 }, { 189, 255 } },
+	  .pilot = { 139, 153, 167, 181 },
+	  .ro = { { 0, 160 }, { 1, 161, 188 }, { 36, 132, 159 } },
+	},
+	{ .null = { { 0, 195 }, { 224 }, { 253 }, { 255 } },
+	  .pilot = { 203, 217, 231, 245 },
+	  .ro = { { 0, 224 }, { 1, 225, 252 }, { 36, 196, 223 } },
+	},
+	{ .null = { { 0, 3 }, { 32 }, { 61, 255 } },
+	  .pilot = { 11, 25, 39, 53 },
+	  .ro = { { 0, 32 }, { 1, 33, 60 }, { 36, 4, 31 } },
+	},
+	{ .null = { { 0, 67 }, { 96 }, { 125, 255 } },
+	  .pilot = { 75, 89, 103, 117 },
+	  .ro = { { 0, 96 }, { 1, 97, 124 }, { 36, 68, 95 } },
+	},
+	{ .null = { { 0, 133 }, { 191, 193 }, { 251, 255 } },
+	  .pilot = { 139, 167, 181, 203, 217, 245 },
+	  .ro = { { 0, 192 }, { 2, 194, 250 }, { 70, 134, 190 } },
+	},
+	{ .null = { { 0, 5 }, { 63, 65 }, { 123, 127 } },
+	  .pilot = { 11, 39, 53, 75, 89, 117 },
+	  .ro = { { 0, 64 }, { 2, 66, 122 }, { 70, 6, 62 } },
+	},
+	{ .null = { { 0, 1 }, { 123, 133 }, { 255 } },
+	  .pilot = { 11, 39, 75, 103, 153, 181, 217, 245 },
+	  .ro = { { 0, 0, 255 } },
+	},
+
+	/* HE */
+	{ .null = { { 0 }, { 31, 33 } },
+	  .pilot = { 12, 29, 35, 52 },
+	  .ro = { { 0, 0, 63 } },
+	},
+	{ .null = { { 30, 34 }, { 96 } },
+	  .pilot = { 4, 21, 43, 60, 70, 87, 105, 122 },
+	  .ro = { { 0, 96 }, { 34, 66, 95 }, { 1, 97, 126 } },
+	},
+	{ .null = { { 32 }, { 94, 98 } },
+	  .pilot = { 6, 23, 41, 58, 68, 85, 107, 124 },
+	  .ro = { { 0, 32 }, { 34, 2, 31 }, { 1, 31, 62 } },
+	},
+	{ .null = { { 0 }, { 62, 66 } },
+	  .pilot = { 9, 26, 36, 53, 75, 92, 102, 119 },
+	  .ro = { { 0, 0, 127 } },
+	},
+	{ .null = { { 30, 34 }, { 160 } },
+	  .pilot = { 4, 21, 43, 60, 137, 154, 166, 183 },
+	  .ro = { { 0, 160 }, { 1, 161, 190 }, { 34, 130, 159 } },
+	},
+	{ .null = { { 94, 98 }, { 224 } },
+	  .pilot = { 68, 85, 107, 124, 201, 218, 230, 247 },
+	  .ro = { { 0, 224 }, { 1, 225, 254 }, { 34, 194, 223 } },
+	},
+	{ .null = { { 32 }, { 158, 162 } },
+	  .pilot = { 9, 26, 38, 55, 132, 149, 171, 188 },
+	  .ro = { { 0, 32 }, { 1, 33, 62 }, { 34, 2, 31 } },
+	},
+	{ .null = { { 96 }, { 222, 226 } },
+	  .pilot = { 73, 90, 102, 119, 196, 213, 235, 252 },
+	  .ro = { { 0, 96 }, { 1, 97, 126 }, { 34, 66, 95 } },
+	},
+	{ .null = { { 62, 66 }, { 192 } },
+	  .pilot = { 36, 53, 75, 92, 169, 186, 198, 215 },
+	  .ro = { { 0, 192 }, { 1, 193, 253 }, { 67, 131, 191 } },
+	},
+	{ .null = { { 64 }, { 190, 194 } },
+	  .pilot = { 41, 58, 70, 87, 164, 181, 203, 220 },
+	  .ro = { { 0, 64 }, { 1, 65, 125 }, { 67, 3, 63 } },
+	},
+	{ .null = { { 0 }, { 126, 130 } },
+	  .pilot = { 6, 23, 100, 117, 139, 156, 233, 250 },
+	  .ro = { { 0, 0, 255 } },
+	},
+};
+
+static inline u8 csi_group_idx(u8 mode, u8 ch_bw, u8 data_bw, u8 pri_ch_idx)
+{
+	if (ch_bw < 2 || data_bw < 1)
+		return mode * 11 + ch_bw * ch_bw + pri_ch_idx;
+	else
+		return mode * 11 + ch_bw * ch_bw + (data_bw + 1) * 2 + pri_ch_idx;
+}
+
+static int mt7915_vendor_csi_ctrl(struct wiphy *wiphy,
+				  struct wireless_dev *wdev,
+				  const void *data,
+				  int data_len)
+{
+	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+	struct mt7915_phy *phy = mt7915_hw_phy(hw);
+	struct nlattr *tb[NUM_MTK_VENDOR_ATTRS_CSI_CTRL];
+	int err;
+
+	err = nla_parse(tb, MTK_VENDOR_ATTR_CSI_CTRL_MAX, data, data_len,
+			csi_ctrl_policy, NULL);
+	if (err)
+		return err;
+
+	if (tb[MTK_VENDOR_ATTR_CSI_CTRL_CFG]) {
+		u8 mode = 0, type = 0, v1 = 0, v2 = 0;
+		u8 mac_addr[ETH_ALEN] = {};
+		struct nlattr *cur;
+		int rem;
+
+		nla_for_each_nested(cur, tb[MTK_VENDOR_ATTR_CSI_CTRL_CFG], rem) {
+			switch(nla_type(cur)) {
+			case MTK_VENDOR_ATTR_CSI_CTRL_CFG_MODE:
+				mode = nla_get_u8(cur);
+				break;
+			case MTK_VENDOR_ATTR_CSI_CTRL_CFG_TYPE:
+				type = nla_get_u8(cur);
+				break;
+			case MTK_VENDOR_ATTR_CSI_CTRL_CFG_VAL1:
+				v1 = nla_get_u8(cur);
+				break;
+			case MTK_VENDOR_ATTR_CSI_CTRL_CFG_VAL2:
+				v2 = nla_get_u8(cur);
+				break;
+			default:
+				return -EINVAL;
+			};
+		}
+
+		if (tb[MTK_VENDOR_ATTR_CSI_CTRL_MAC_ADDR]) {
+			int idx = 0;
+
+			nla_for_each_nested(cur, tb[MTK_VENDOR_ATTR_CSI_CTRL_MAC_ADDR], rem) {
+				mac_addr[idx++] = nla_get_u8(cur);
+			}
+		}
+
+		mt7915_mcu_set_csi(phy, mode, type, v1, v2, mac_addr);
+
+		spin_lock_bh(&phy->csi.csi_lock);
+
+		phy->csi.enable = !!mode;
+
+		if (mode == 2 && type == 5) {
+			if (v1 >= 1)
+				phy->csi.mask = 1;
+			if (v1 == 2)
+				phy->csi.reorder = 1;
+		}
+
+		/* clean up old csi stats */
+		if ((mode == 0 || mode == 2) && !list_empty(&phy->csi.csi_list)) {
+			struct csi_data *c, *tmp_c;
+
+			list_for_each_entry_safe(c, tmp_c, &phy->csi.csi_list,
+						 node) {
+				list_del(&c->node);
+				kfree(c);
+				phy->csi.count--;
+			}
+		} else if (mode == 1) {
+			phy->csi.last_record = 0;
+		}
+
+		spin_unlock_bh(&phy->csi.csi_lock);
+	}
+
+	if (tb[MTK_VENDOR_ATTR_CSI_CTRL_INTERVAL])
+		phy->csi.interval = nla_get_u32(tb[MTK_VENDOR_ATTR_CSI_CTRL_INTERVAL]);
+
+	return 0;
+}
+
+static void
+mt7915_vendor_csi_tone_mask(struct mt7915_phy *phy, struct csi_data *csi)
+{
+	static const u8 mode_map[] = {
+		[MT_PHY_TYPE_OFDM] = 0,
+		[MT_PHY_TYPE_HT] = 1,
+		[MT_PHY_TYPE_VHT] = 1,
+		[MT_PHY_TYPE_HE_SU] = 2,
+	};
+	const struct csi_mask *cmask;
+	int i;
+
+	if (csi->rx_mode == MT_PHY_TYPE_CCK || !phy->csi.mask)
+		return;
+
+	if (csi->data_bw == IEEE80211_STA_RX_BW_40)
+		csi->pri_ch_idx /= 2;
+
+	cmask = &csi_mask_groups[csi_group_idx(mode_map[csi->rx_mode],
+					       csi->ch_bw,
+					       csi->data_bw,
+					       csi->pri_ch_idx)];
+
+	for (i = 0; i < 10; i++) {
+		const struct csi_null_tone *ntone = &cmask->null[i];
+		u8 start = ntone->start;
+		u8 end = ntone->end;
+		int j;
+
+		if (!start && !end && i > 0)
+			break;
+
+		if (!end)
+			end = start;
+
+		for (j = start; j <= end; j++) {
+			csi->data_i[j] = 0;
+			csi->data_q[j] = 0;
+		}
+	}
+
+	for (i = 0; i < 8; i++) {
+		u8 pilot = cmask->pilot[i];
+
+		if (!pilot)
+			break;
+
+		csi->data_i[pilot] = 0;
+		csi->data_q[pilot] = 0;
+	}
+
+	if (!phy->csi.reorder)
+		return;
+
+	for (i = 0; i < 3; i++) {
+		const struct csi_reorder *ro = &cmask->ro[i];
+		u8 dest = ro->dest;
+		u8 start = ro->start;
+		u8 end = ro->end;
+
+		if (!dest && !start && !end)
+			break;
+
+		if (dest == start)
+			continue;
+
+		if (end) {
+			memmove(&csi->data_i[dest], &csi->data_i[start],
+				end - start + 1);
+			memmove(&csi->data_q[dest], &csi->data_q[start],
+				end - start + 1);
+		} else {
+			csi->data_i[dest] = csi->data_i[start];
+			csi->data_q[dest] = csi->data_q[start];
+		}
+	}
+}
+
+static int
+mt7915_vendor_csi_ctrl_dump(struct wiphy *wiphy, struct wireless_dev *wdev,
+			    struct sk_buff *skb, const void *data, int data_len,
+			    unsigned long *storage)
+{
+#define RESERVED_SET	BIT(31)
+	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
+	struct mt7915_phy *phy = mt7915_hw_phy(hw);
+	struct nlattr *tb[NUM_MTK_VENDOR_ATTRS_CSI_CTRL];
+	int err = 0;
+
+	if (*storage & RESERVED_SET) {
+		if ((*storage & GENMASK(15, 0)) == 0)
+			return -ENOENT;
+		(*storage)--;
+	}
+
+	if (data) {
+		err = nla_parse(tb, MTK_VENDOR_ATTR_CSI_CTRL_MAX, data, data_len,
+				csi_ctrl_policy, NULL);
+		if (err)
+			return err;
+	}
+
+	if (!(*storage & RESERVED_SET) && tb[MTK_VENDOR_ATTR_CSI_CTRL_DUMP_NUM]) {
+		*storage = nla_get_u16(tb[MTK_VENDOR_ATTR_CSI_CTRL_DUMP_NUM]);
+		*storage |= RESERVED_SET;
+	}
+
+	spin_lock_bh(&phy->csi.csi_lock);
+
+	if (!list_empty(&phy->csi.csi_list)) {
+		struct csi_data *csi;
+		void *a, *b;
+		int i;
+
+		csi = list_first_entry(&phy->csi.csi_list, struct csi_data, node);
+
+		mt7915_vendor_csi_tone_mask(phy, csi);
+
+		a = nla_nest_start(skb, MTK_VENDOR_ATTR_CSI_CTRL_DATA);
+
+		if (nla_put_u8(skb, MTK_VENDOR_ATTR_CSI_DATA_VER, 1) ||
+		    nla_put_u8(skb, MTK_VENDOR_ATTR_CSI_DATA_RSSI, csi->rssi) ||
+		    nla_put_u8(skb, MTK_VENDOR_ATTR_CSI_DATA_SNR, csi->snr) ||
+		    nla_put_u8(skb, MTK_VENDOR_ATTR_CSI_DATA_BW, csi->data_bw) ||
+		    nla_put_u8(skb, MTK_VENDOR_ATTR_CSI_DATA_CH_IDX, csi->pri_ch_idx) ||
+		    nla_put_u8(skb, MTK_VENDOR_ATTR_CSI_DATA_MODE, csi->rx_mode))
+			goto out;
+
+		if (nla_put_u16(skb, MTK_VENDOR_ATTR_CSI_DATA_TX_ANT, csi->tx_idx) ||
+		    nla_put_u16(skb, MTK_VENDOR_ATTR_CSI_DATA_RX_ANT, csi->rx_idx))
+			goto out;
+
+		if (nla_put_u32(skb, MTK_VENDOR_ATTR_CSI_DATA_INFO, csi->info) ||
+		    nla_put_u32(skb, MTK_VENDOR_ATTR_CSI_DATA_H_IDX, csi->h_idx) ||
+		    nla_put_u32(skb, MTK_VENDOR_ATTR_CSI_DATA_TS, csi->ts))
+			goto out;
+
+		b = nla_nest_start(skb, MTK_VENDOR_ATTR_CSI_DATA_TA);
+			for (i = 0; i < ARRAY_SIZE(csi->ta); i++)
+				if (nla_put_u8(skb, i, csi->ta[i]))
+					goto out;
+		nla_nest_end(skb, b);
+
+		b = nla_nest_start(skb, MTK_VENDOR_ATTR_CSI_DATA_I);
+			for (i = 0; i < ARRAY_SIZE(csi->data_i); i++)
+				if (nla_put_u16(skb, i, csi->data_i[i]))
+					goto out;
+		nla_nest_end(skb, b);
+
+		b = nla_nest_start(skb, MTK_VENDOR_ATTR_CSI_DATA_Q);
+			for (i = 0; i < ARRAY_SIZE(csi->data_q); i++)
+				if (nla_put_u16(skb, i, csi->data_q[i]))
+					goto out;
+		nla_nest_end(skb, b);
+
+		nla_nest_end(skb, a);
+
+		list_del(&csi->node);
+		kfree(csi);
+		phy->csi.count--;
+
+		err = phy->csi.count;
+	}
+out:
+	spin_unlock_bh(&phy->csi.csi_lock);
+
+	return err;
+}
+
+static const struct wiphy_vendor_command mt7915_vendor_commands[] = {
+	{
+		.info = {
+			.vendor_id = MTK_NL80211_VENDOR_ID,
+			.subcmd = MTK_NL80211_VENDOR_SUBCMD_CSI_CTRL,
+		},
+		.flags = WIPHY_VENDOR_CMD_NEED_NETDEV |
+			 WIPHY_VENDOR_CMD_NEED_RUNNING,
+		.doit = mt7915_vendor_csi_ctrl,
+		.dumpit = mt7915_vendor_csi_ctrl_dump,
+		.policy = csi_ctrl_policy,
+		.maxattr = MTK_VENDOR_ATTR_CSI_CTRL_MAX,
+	}
+};
+
+void mt7915_vendor_register(struct mt7915_phy *phy)
+{
+	phy->mt76->hw->wiphy->vendor_commands = mt7915_vendor_commands;
+	phy->mt76->hw->wiphy->n_vendor_commands = ARRAY_SIZE(mt7915_vendor_commands);
+}
diff --git a/mt7915/vendor.h b/mt7915/vendor.h
new file mode 100644
index 00000000..9d3db2a7
--- /dev/null
+++ b/mt7915/vendor.h
@@ -0,0 +1,60 @@
+#ifndef __MT7915_VENDOR_H
+#define __MT7915_VENDOR_H
+
+#define MTK_NL80211_VENDOR_ID	0x0ce7
+
+enum mtk_nl80211_vendor_subcmds {
+	MTK_NL80211_VENDOR_SUBCMD_CSI_CTRL = 0xc2,
+};
+
+enum mtk_vendor_attr_csi_ctrl {
+	MTK_VENDOR_ATTR_CSI_CTRL_UNSPEC,
+
+	MTK_VENDOR_ATTR_CSI_CTRL_CFG,
+	MTK_VENDOR_ATTR_CSI_CTRL_CFG_MODE,
+	MTK_VENDOR_ATTR_CSI_CTRL_CFG_TYPE,
+	MTK_VENDOR_ATTR_CSI_CTRL_CFG_VAL1,
+	MTK_VENDOR_ATTR_CSI_CTRL_CFG_VAL2,
+	MTK_VENDOR_ATTR_CSI_CTRL_MAC_ADDR,
+	MTK_VENDOR_ATTR_CSI_CTRL_INTERVAL,
+
+	MTK_VENDOR_ATTR_CSI_CTRL_DUMP_NUM,
+
+	MTK_VENDOR_ATTR_CSI_CTRL_DATA,
+
+	/* keep last */
+	NUM_MTK_VENDOR_ATTRS_CSI_CTRL,
+	MTK_VENDOR_ATTR_CSI_CTRL_MAX =
+		NUM_MTK_VENDOR_ATTRS_CSI_CTRL - 1
+};
+
+enum mtk_vendor_attr_csi_data {
+	MTK_VENDOR_ATTR_CSI_DATA_UNSPEC,
+	MTK_VENDOR_ATTR_CSI_DATA_PAD,
+
+	MTK_VENDOR_ATTR_CSI_DATA_VER,
+	MTK_VENDOR_ATTR_CSI_DATA_TS,
+	MTK_VENDOR_ATTR_CSI_DATA_RSSI,
+	MTK_VENDOR_ATTR_CSI_DATA_SNR,
+	MTK_VENDOR_ATTR_CSI_DATA_BW,
+	MTK_VENDOR_ATTR_CSI_DATA_CH_IDX,
+	MTK_VENDOR_ATTR_CSI_DATA_TA,
+	MTK_VENDOR_ATTR_CSI_DATA_I,
+	MTK_VENDOR_ATTR_CSI_DATA_Q,
+	MTK_VENDOR_ATTR_CSI_DATA_INFO,
+	MTK_VENDOR_ATTR_CSI_DATA_RSVD1,
+	MTK_VENDOR_ATTR_CSI_DATA_RSVD2,
+	MTK_VENDOR_ATTR_CSI_DATA_RSVD3,
+	MTK_VENDOR_ATTR_CSI_DATA_RSVD4,
+	MTK_VENDOR_ATTR_CSI_DATA_TX_ANT,
+	MTK_VENDOR_ATTR_CSI_DATA_RX_ANT,
+	MTK_VENDOR_ATTR_CSI_DATA_MODE,
+	MTK_VENDOR_ATTR_CSI_DATA_H_IDX,
+
+	/* keep last */
+	NUM_MTK_VENDOR_ATTRS_CSI_DATA,
+	MTK_VENDOR_ATTR_CSI_DATA_MAX =
+		NUM_MTK_VENDOR_ATTRS_CSI_DATA - 1
+};
+
+#endif
-- 
2.18.0