rtw88: move adaptivity mechanism to firmware

Current adaptivity mechanism is achieved in driver, by periodically
referencing the IGI value and then updating related registers.
But we find that this way may halt TX activity too long if huge
and temporary energy is detected frequently. So we move the mechanism
to firmware for immediately reacting this case to recover TX rapidly.
Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210830072014.12250-5-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/debug.h

@@ -21,6 +21,7 @@ enum rtw_debug_mask {
 	RTW_DBG_WOW		= 0x00001000,
 	RTW_DBG_CFO		= 0x00002000,
 	RTW_DBG_PATH_DIV	= 0x00004000,
+	RTW_DBG_ADAPTIVITY	= 0x00008000,
 
 	RTW_DBG_ALL		= 0xffffffff
 };

drivers/net/wireless/realtek/rtw88/fw.c

@@ -183,6 +183,28 @@ static void rtw_fw_scan_result(struct rtw_dev *rtwdev, u8 *payload,
 		dm_info->scan_density);
 }
 
+static void rtw_fw_adaptivity_result(struct rtw_dev *rtwdev, u8 *payload,
+				     u8 length)
+{
+	struct rtw_hw_reg_offset *edcca_th = rtwdev->chip->edcca_th;
+	struct rtw_c2h_adaptivity *result = (struct rtw_c2h_adaptivity *)payload;
+
+	rtw_dbg(rtwdev, RTW_DBG_ADAPTIVITY,
+		"Adaptivity: density %x igi %x l2h_th_init %x l2h %x h2l %x option %x\n",
+		result->density, result->igi, result->l2h_th_init, result->l2h,
+		result->h2l, result->option);
+
+	rtw_dbg(rtwdev, RTW_DBG_ADAPTIVITY, "Reg Setting: L2H %x H2L %x\n",
+		rtw_read32_mask(rtwdev, edcca_th[EDCCA_TH_L2H_IDX].hw_reg.addr,
+				edcca_th[EDCCA_TH_L2H_IDX].hw_reg.mask),
+		rtw_read32_mask(rtwdev, edcca_th[EDCCA_TH_H2L_IDX].hw_reg.addr,
+				edcca_th[EDCCA_TH_H2L_IDX].hw_reg.mask));
+
+	rtw_dbg(rtwdev, RTW_DBG_ADAPTIVITY, "EDCCA Flag %s\n",
+		rtw_read32_mask(rtwdev, REG_EDCCA_REPORT, BIT_EDCCA_FLAG) ?
+		"Set" : "Unset");
+}
+
 void rtw_fw_c2h_cmd_handle(struct rtw_dev *rtwdev, struct sk_buff *skb)
 {
 	struct rtw_c2h_cmd *c2h;
@@ -252,6 +274,10 @@ void rtw_fw_c2h_cmd_rx_irqsafe(struct rtw_dev *rtwdev, u32 pkt_offset,
 		rtw_fw_scan_result(rtwdev, c2h->payload, len);
 		dev_kfree_skb_any(skb);
 		break;
+	case C2H_ADAPTIVITY:
+		rtw_fw_adaptivity_result(rtwdev, c2h->payload, len);
+		dev_kfree_skb_any(skb);
+		break;
 	default:
 		/* pass offset for further operation */
 		*((u32 *)skb->cb) = pkt_offset;
@@ -1722,6 +1748,27 @@ void rtw_fw_channel_switch(struct rtw_dev *rtwdev, bool enable)
 	rtw_fw_send_h2c_packet(rtwdev, h2c_pkt);
 }
 
+void rtw_fw_adaptivity(struct rtw_dev *rtwdev)
+{
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
+	u8 h2c_pkt[H2C_PKT_SIZE] = {0};
+
+	if (!rtw_edcca_enabled) {
+		dm_info->edcca_mode = RTW_EDCCA_NORMAL;
+		rtw_dbg(rtwdev, RTW_DBG_ADAPTIVITY,
+			"EDCCA disabled by debugfs\n");
+	}
+
+	SET_H2C_CMD_ID_CLASS(h2c_pkt, H2C_CMD_ADAPTIVITY);
+	SET_ADAPTIVITY_MODE(h2c_pkt, dm_info->edcca_mode);
+	SET_ADAPTIVITY_OPTION(h2c_pkt, 2);
+	SET_ADAPTIVITY_IGI(h2c_pkt, dm_info->igi_history[0]);
+	SET_ADAPTIVITY_L2H(h2c_pkt, dm_info->l2h_th_ini);
+	SET_ADAPTIVITY_DENSITY(h2c_pkt, dm_info->scan_density);
+
+	rtw_fw_send_h2c_command(rtwdev, h2c_pkt);
+}
+
 void rtw_fw_scan_notify(struct rtw_dev *rtwdev, bool start)
 {
 	u8 h2c_pkt[H2C_PKT_SIZE] = {0};

drivers/net/wireless/realtek/rtw88/fw.h

@@ -41,6 +41,7 @@ enum rtw_c2h_cmd_id {
 	C2H_WLAN_INFO = 0x27,
 	C2H_WLAN_RFON = 0x32,
 	C2H_BCN_FILTER_NOTIFY = 0x36,
+	C2H_ADAPTIVITY = 0x37,
 	C2H_SCAN_RESULT = 0x38,
 	C2H_HW_FEATURE_DUMP = 0xfd,
 	C2H_HALMAC = 0xff,
@@ -56,6 +57,15 @@ struct rtw_c2h_cmd {
 	u8 payload[];
 } __packed;
 
+struct rtw_c2h_adaptivity {
+	u8 density;
+	u8 igi;
+	u8 l2h_th_init;
+	u8 l2h;
+	u8 h2l;
+	u8 option;
+} __packed;
+
 enum rtw_rsvd_packet_type {
 	RSVD_BEACON,
 	RSVD_DUMMY,
@@ -90,6 +100,7 @@ enum rtw_fw_feature {
 	FW_FEATURE_PG = BIT(3),
 	FW_FEATURE_BCN_FILTER = BIT(5),
 	FW_FEATURE_NOTIFY_SCAN = BIT(6),
+	FW_FEATURE_ADAPTIVITY = BIT(7),
 	FW_FEATURE_MAX = BIT(31),
 };
 
@@ -375,6 +386,7 @@ static inline void rtw_h2c_pkt_set_header(u8 *h2c_pkt, u8 sub_id)
 #define H2C_CMD_BCN_FILTER_OFFLOAD_P1	0x57
 #define H2C_CMD_WL_PHY_INFO		0x58
 #define H2C_CMD_SCAN			0x59
+#define H2C_CMD_ADAPTIVITY		0x5A
 
 #define H2C_CMD_COEX_TDMA_TYPE		0x60
 #define H2C_CMD_QUERY_BT_INFO		0x61
@@ -428,6 +440,17 @@ static inline void rtw_h2c_pkt_set_header(u8 *h2c_pkt, u8 sub_id)
 #define SET_SCAN_START(h2c_pkt, value)					       \
 	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, BIT(8))
 
+#define SET_ADAPTIVITY_MODE(h2c_pkt, value)				       \
+	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, GENMASK(11, 8))
+#define SET_ADAPTIVITY_OPTION(h2c_pkt, value)				       \
+	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, GENMASK(15, 12))
+#define SET_ADAPTIVITY_IGI(h2c_pkt, value)				       \
+	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, GENMASK(23, 16))
+#define SET_ADAPTIVITY_L2H(h2c_pkt, value)				       \
+	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, GENMASK(31, 24))
+#define SET_ADAPTIVITY_DENSITY(h2c_pkt, value)				       \
+	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x01, value, GENMASK(7, 0))
+
 #define SET_PWR_MODE_SET_MODE(h2c_pkt, value)                                  \
 	le32p_replace_bits((__le32 *)(h2c_pkt) + 0x00, value, GENMASK(14, 8))
 #define SET_PWR_MODE_SET_RLBM(h2c_pkt, value)                                  \
@@ -662,4 +685,5 @@ void rtw_fw_c2h_cmd_isr(struct rtw_dev *rtwdev);
 int rtw_fw_dump_fifo(struct rtw_dev *rtwdev, u8 fifo_sel, u32 addr, u32 size,
 		     u32 *buffer);
 void rtw_fw_scan_notify(struct rtw_dev *rtwdev, bool start);
+void rtw_fw_adaptivity(struct rtw_dev *rtwdev);
 #endif

drivers/net/wireless/realtek/rtw88/phy.c

@@ -770,7 +770,11 @@ void rtw_phy_dynamic_mechanism(struct rtw_dev *rtwdev)
 	rtw_phy_cfo_track(rtwdev);
 	rtw_phy_dpk_track(rtwdev);
 	rtw_phy_pwr_track(rtwdev);
-	rtw_phy_adaptivity(rtwdev);
+
+	if (rtw_fw_feature_check(&rtwdev->fw, FW_FEATURE_ADAPTIVITY))
+		rtw_fw_adaptivity(rtwdev);
+	else
+		rtw_phy_adaptivity(rtwdev);
 }
 
 #define FRAC_BITS 3

drivers/net/wireless/realtek/rtw88/reg.h

@@ -642,6 +642,9 @@
 
 #define REG_HRCV_MSG	0x1cf
 
+#define REG_EDCCA_REPORT	0x2d38
+#define BIT_EDCCA_FLAG		BIT(24)
+
 #define REG_IGN_GNTBT4	0x4160
 
 #define RF_MODE		0x00