wifi: rtw89: refine FW feature judgement on packet drop

The newer chips use the newer firmware branches, e.g. v027, v029.
And, those firmware branches are supposed to support packet drop
when they are just branched out.

The initial firmware branch used by each chip is as below.
* 8852A: v009
* 8852C: v027
* 8852B: v027

So, only 8852A may use firmware which doesn't support packet drop at
runtime. To save trivial positive listing in firmware feature table,
we change to reverse judgment.

Besides, rtw89_mac_ptk_drop_by_band_and_wait() missed to check firmware
feature before calling rtw89_fw_h2c_pkt_drop(). We also fix it.

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@kernel.org>
Link: https://lore.kernel.org/r/20230220070202.29868-7-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.h

@@ -3023,7 +3023,7 @@ enum rtw89_fw_feature {
 	RTW89_FW_FEATURE_SCAN_OFFLOAD,
 	RTW89_FW_FEATURE_TX_WAKE,
 	RTW89_FW_FEATURE_CRASH_TRIGGER,
-	RTW89_FW_FEATURE_PACKET_DROP,
+	RTW89_FW_FEATURE_NO_PACKET_DROP,
 	RTW89_FW_FEATURE_NO_DEEP_PS,
 	RTW89_FW_FEATURE_NO_LPS_PG,
 };

drivers/net/wireless/realtek/rtw89/fw.c

@@ -235,6 +235,7 @@ static bool __fw_feat_cond_ ## __cond(u32 suit_ver_code, u32 comp_ver_code) \
 
 __DEF_FW_FEAT_COND(ge, >=); /* greater or equal */
 __DEF_FW_FEAT_COND(le, <=); /* less or equal */
+__DEF_FW_FEAT_COND(lt, <); /* less than */
 
 struct __fw_feat_cfg {
 	enum rtw89_core_chip_id chip_id;
@@ -256,12 +257,11 @@ static const struct __fw_feat_cfg fw_feat_tbl[] = {
 	__CFG_FW_FEAT(RTL8852A, ge, 0, 13, 35, 0, SCAN_OFFLOAD),
 	__CFG_FW_FEAT(RTL8852A, ge, 0, 13, 35, 0, TX_WAKE),
 	__CFG_FW_FEAT(RTL8852A, ge, 0, 13, 36, 0, CRASH_TRIGGER),
-	__CFG_FW_FEAT(RTL8852A, ge, 0, 13, 38, 0, PACKET_DROP),
+	__CFG_FW_FEAT(RTL8852A, lt, 0, 13, 38, 0, NO_PACKET_DROP),
 	__CFG_FW_FEAT(RTL8852B, ge, 0, 29, 26, 0, NO_LPS_PG),
 	__CFG_FW_FEAT(RTL8852B, ge, 0, 29, 26, 0, TX_WAKE),
 	__CFG_FW_FEAT(RTL8852B, ge, 0, 29, 29, 0, CRASH_TRIGGER),
 	__CFG_FW_FEAT(RTL8852B, ge, 0, 29, 29, 0, SCAN_OFFLOAD),
-	__CFG_FW_FEAT(RTL8852C, ge, 0, 27, 20, 0, PACKET_DROP),
 	__CFG_FW_FEAT(RTL8852C, le, 0, 27, 33, 0, NO_DEEP_PS),
 	__CFG_FW_FEAT(RTL8852C, ge, 0, 27, 34, 0, TX_WAKE),
 	__CFG_FW_FEAT(RTL8852C, ge, 0, 27, 36, 0, SCAN_OFFLOAD),

drivers/net/wireless/realtek/rtw89/mac.c

@@ -5426,7 +5426,7 @@ int rtw89_mac_ptk_drop_by_band_and_wait(struct rtw89_dev *rtwdev,
 	for (i = 0; i < try_cnt; i++) {
 		ret = read_poll_timeout(mac_is_txq_empty, empty, empty, 50,
 					50000, false, rtwdev);
-		if (ret)
+		if (ret && !RTW89_CHK_FW_FEATURE(NO_PACKET_DROP, &rtwdev->fw))
 			rtw89_fw_h2c_pkt_drop(rtwdev, &params);
 		else
 			return 0;

drivers/net/wireless/realtek/rtw89/mac80211.c

@@ -676,7 +676,7 @@ static void rtw89_ops_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	rtw89_leave_lps(rtwdev);
 	rtw89_hci_flush_queues(rtwdev, queues, drop);
 
-	if (drop && RTW89_CHK_FW_FEATURE(PACKET_DROP, &rtwdev->fw))
+	if (drop && !RTW89_CHK_FW_FEATURE(NO_PACKET_DROP, &rtwdev->fw))
 		__rtw89_drop_packets(rtwdev, vif);
 	else
 		rtw89_mac_flush_txq(rtwdev, queues, drop);