wifi: rtw89: mac: handle C2H receive/done ACK in interrupt context

We have some MAC H2Cs (host to chip packets), which have no clear
individual C2Hs (chip to host packets) to indicate FW execution
response, but they are going to require to wait for FW completion.
So, we have to deal with this via common MAC C2H receive/done ACKs.

This commit changes the context, where common MAC C2H receive/done
ACK handlers are executed, to interrupt context. And, code comments
are added to prevent future commits from using it incorrectly.

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/c4d766885e00b9f9dcf7954a80096c8b9d21149b.camel@realtek.com

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

@@ -4336,6 +4336,8 @@ rtw89_mac_c2h_bcn_fltr_rpt(struct rtw89_dev *rtwdev, struct sk_buff *c2h,
 static void
 rtw89_mac_c2h_rec_ack(struct rtw89_dev *rtwdev, struct sk_buff *c2h, u32 len)
 {
+	/* N.B. This will run in interrupt context. */
+
 	rtw89_debug(rtwdev, RTW89_DBG_FW,
 		    "C2H rev ack recv, cat: %d, class: %d, func: %d, seq : %d\n",
 		    RTW89_GET_MAC_C2H_REV_ACK_CAT(c2h->data),
@@ -4347,6 +4349,8 @@ rtw89_mac_c2h_rec_ack(struct rtw89_dev *rtwdev, struct sk_buff *c2h, u32 len)
 static void
 rtw89_mac_c2h_done_ack(struct rtw89_dev *rtwdev, struct sk_buff *c2h, u32 len)
 {
+	/* N.B. This will run in interrupt context. */
+
 	rtw89_debug(rtwdev, RTW89_DBG_FW,
 		    "C2H done ack recv, cat: %d, class: %d, func: %d, ret: %d, seq : %d\n",
 		    RTW89_GET_MAC_C2H_DONE_ACK_CAT(c2h->data),
@@ -4592,6 +4596,14 @@ bool rtw89_mac_c2h_chk_atomic(struct rtw89_dev *rtwdev, u8 class, u8 func)
 	switch (class) {
 	default:
 		return false;
+	case RTW89_MAC_C2H_CLASS_INFO:
+		switch (func) {
+		default:
+			return false;
+		case RTW89_MAC_C2H_FUNC_REC_ACK:
+		case RTW89_MAC_C2H_FUNC_DONE_ACK:
+			return true;
+		}
 	case RTW89_MAC_C2H_CLASS_OFLD:
 		switch (func) {
 		default: