wifi: rtw89: add to fill TX descriptor for firmware command v2

This kind of TX descriptor is used to download firmware or send firmware
command. Because we want to reduce descriptor overhead and this only needs
two fields 'size' and 'type', hardware designers choose short form of
RX descriptor for it.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230911082049.33541-3-pkshih@realtek.com

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

@@ -1235,6 +1235,26 @@ void rtw89_core_fill_txdesc_fwcmd_v1(struct rtw89_dev *rtwdev,
 }
 EXPORT_SYMBOL(rtw89_core_fill_txdesc_fwcmd_v1);
 
+static __le32 rtw89_build_txwd_fwcmd0_v2(struct rtw89_tx_desc_info *desc_info)
+{
+	u32 dword = FIELD_PREP(BE_RXD_RPKT_LEN_MASK, desc_info->pkt_size) |
+		    FIELD_PREP(BE_RXD_RPKT_TYPE_MASK, desc_info->fw_dl ?
+						      RTW89_CORE_RX_TYPE_FWDL :
+						      RTW89_CORE_RX_TYPE_H2C);
+
+	return cpu_to_le32(dword);
+}
+
+void rtw89_core_fill_txdesc_fwcmd_v2(struct rtw89_dev *rtwdev,
+				     struct rtw89_tx_desc_info *desc_info,
+				     void *txdesc)
+{
+	struct rtw89_rxdesc_short_v2 *txwd_v2 = (struct rtw89_rxdesc_short_v2 *)txdesc;
+
+	txwd_v2->dword0 = rtw89_build_txwd_fwcmd0_v2(desc_info);
+}
+EXPORT_SYMBOL(rtw89_core_fill_txdesc_fwcmd_v2);
+
 static int rtw89_core_rx_process_mac_ppdu(struct rtw89_dev *rtwdev,
 					  struct sk_buff *skb,
 					  struct rtw89_rx_phy_ppdu *phy_ppdu)

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

@@ -5480,6 +5480,9 @@ void rtw89_core_fill_txdesc_v1(struct rtw89_dev *rtwdev,
 void rtw89_core_fill_txdesc_fwcmd_v1(struct rtw89_dev *rtwdev,
 				     struct rtw89_tx_desc_info *desc_info,
 				     void *txdesc);
+void rtw89_core_fill_txdesc_fwcmd_v2(struct rtw89_dev *rtwdev,
+				     struct rtw89_tx_desc_info *desc_info,
+				     void *txdesc);
 void rtw89_core_rx(struct rtw89_dev *rtwdev,
 		   struct rtw89_rx_desc_info *desc_info,
 		   struct sk_buff *skb);