wifi: rtw89: phy: refine helpers used for raw TX power

Originally, these helpers were implemented by macros. We rewrite them
by normal functions. In the new function to seek raw TX power by rate,
we access the array according to rate section and discard the original
pointer arithmetic.
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/20230920074322.42898-5-pkshih@realtek.com

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

@@ -718,6 +718,7 @@ struct rtw89_txpwr_byrate {
 	s8 mcs[RTW89_NSS_NUM][RTW89_RATE_MCS_NUM];
 	s8 hedcm[RTW89_NSS_HEDCM_NUM][RTW89_RATE_HEDCM_NUM];
 	s8 offset[RTW89_RATE_OFFSET_NUM];
+	s8 trap;
 };
 
 enum rtw89_bandwidth_section_num {

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

@@ -1535,68 +1535,75 @@ static const u8 rtw89_rs_nss_num[] = {
 	[RTW89_RS_OFFSET] = 1,
 };
 
-static const u8 _byr_of_rs[] = {
-	[RTW89_RS_CCK] = offsetof(struct rtw89_txpwr_byrate, cck),
-	[RTW89_RS_OFDM] = offsetof(struct rtw89_txpwr_byrate, ofdm),
-	[RTW89_RS_MCS] = offsetof(struct rtw89_txpwr_byrate, mcs),
-	[RTW89_RS_HEDCM] = offsetof(struct rtw89_txpwr_byrate, hedcm),
-	[RTW89_RS_OFFSET] = offsetof(struct rtw89_txpwr_byrate, offset),
-};
-
-#define _byr_seek(rs, raw) ((s8 *)(raw) + _byr_of_rs[rs])
-#define _byr_idx(rs, nss, idx) ((nss) * rtw89_rs_idx_num[rs] + (idx))
-#define _byr_chk(rs, nss, idx) \
-	((nss) < rtw89_rs_nss_num[rs] && (idx) < rtw89_rs_idx_num[rs])
+static
+s8 *rtw89_phy_raw_byr_seek(struct rtw89_dev *rtwdev,
+			   struct rtw89_txpwr_byrate *head,
+			   const struct rtw89_rate_desc *desc)
+{
+	switch (desc->rs) {
+	case RTW89_RS_CCK:
+		return &head->cck[desc->idx];
+	case RTW89_RS_OFDM:
+		return &head->ofdm[desc->idx];
+	case RTW89_RS_MCS:
+		return &head->mcs[desc->nss][desc->idx];
+	case RTW89_RS_HEDCM:
+		return &head->hedcm[desc->nss][desc->idx];
+	case RTW89_RS_OFFSET:
+		return &head->offset[desc->idx];
+	default:
+		rtw89_warn(rtwdev, "unrecognized byr rs: %d\n", desc->rs);
+		return &head->trap;
+	}
+}
 
 void rtw89_phy_load_txpwr_byrate(struct rtw89_dev *rtwdev,
 				 const struct rtw89_txpwr_table *tbl)
 {
 	const struct rtw89_txpwr_byrate_cfg *cfg = tbl->data;
 	const struct rtw89_txpwr_byrate_cfg *end = cfg + tbl->size;
+	struct rtw89_txpwr_byrate *byr_head;
+	struct rtw89_rate_desc desc = {};
 	s8 *byr;
 	u32 data;
-	u8 i, idx;
+	u8 i;
 
 	for (; cfg < end; cfg++) {
-		byr = _byr_seek(cfg->rs, &rtwdev->byr[cfg->band]);
+		byr_head = &rtwdev->byr[cfg->band];
+		desc.rs = cfg->rs;
+		desc.nss = cfg->nss;
 		data = cfg->data;
 
 		for (i = 0; i < cfg->len; i++, data >>= 8) {
-			idx = _byr_idx(cfg->rs, cfg->nss, (cfg->shf + i));
-			byr[idx] = (s8)(data & 0xff);
+			desc.idx = cfg->shf + i;
+			byr = rtw89_phy_raw_byr_seek(rtwdev, byr_head, &desc);
+			*byr = data & 0xff;
 		}
 	}
 }
 EXPORT_SYMBOL(rtw89_phy_load_txpwr_byrate);
 
-#define _phy_txpwr_rf_to_mac(rtwdev, txpwr_rf)				\
-({									\
-	const struct rtw89_chip_info *__c = (rtwdev)->chip;		\
-	(txpwr_rf) >> (__c->txpwr_factor_rf - __c->txpwr_factor_mac);	\
-})
+static s8 rtw89_phy_txpwr_rf_to_mac(struct rtw89_dev *rtwdev, s8 txpwr_rf)
+{
+	const struct rtw89_chip_info *chip = rtwdev->chip;
+
+	return txpwr_rf >> (chip->txpwr_factor_rf - chip->txpwr_factor_mac);
+}
 
 static
 s8 rtw89_phy_read_txpwr_byrate(struct rtw89_dev *rtwdev, u8 band,
 			       const struct rtw89_rate_desc *rate_desc)
 {
+	struct rtw89_txpwr_byrate *byr_head;
 	s8 *byr;
-	u8 idx;
 
 	if (rate_desc->rs == RTW89_RS_CCK)
 		band = RTW89_BAND_2G;
 
-	if (!_byr_chk(rate_desc->rs, rate_desc->nss, rate_desc->idx)) {
-		rtw89_debug(rtwdev, RTW89_DBG_TXPWR,
-			    "[TXPWR] unknown byrate desc rs=%d nss=%d idx=%d\n",
-			    rate_desc->rs, rate_desc->nss, rate_desc->idx);
-
-		return 0;
-	}
-
-	byr = _byr_seek(rate_desc->rs, &rtwdev->byr[band]);
-	idx = _byr_idx(rate_desc->rs, rate_desc->nss, rate_desc->idx);
+	byr_head = &rtwdev->byr[band];
+	byr = rtw89_phy_raw_byr_seek(rtwdev, byr_head, rate_desc);
 
-	return _phy_txpwr_rf_to_mac(rtwdev, byr[idx]);
+	return rtw89_phy_txpwr_rf_to_mac(rtwdev, *byr);
 }
 
 static u8 rtw89_channel_6g_to_idx(struct rtw89_dev *rtwdev, u8 channel_6g)
@@ -1688,7 +1695,7 @@ s8 rtw89_phy_read_txpwr_limit(struct rtw89_dev *rtwdev, u8 band,
 		return 0;
 	}
 
-	lmt = _phy_txpwr_rf_to_mac(rtwdev, lmt);
+	lmt = rtw89_phy_txpwr_rf_to_mac(rtwdev, lmt);
 	sar = rtw89_query_sar(rtwdev, freq);
 
 	return min(lmt, sar);
@@ -1945,7 +1952,7 @@ static s8 rtw89_phy_read_txpwr_limit_ru(struct rtw89_dev *rtwdev, u8 band,
 		return 0;
 	}
 
-	lmt_ru = _phy_txpwr_rf_to_mac(rtwdev, lmt_ru);
+	lmt_ru = rtw89_phy_txpwr_rf_to_mac(rtwdev, lmt_ru);
 	sar = rtw89_query_sar(rtwdev, freq);
 
 	return min(lmt_ru, sar);