wifi: cfg80211: move puncturing validation code

Upcoming patches will move the puncturing bitmap into the
chandef, so chandef validation will need to check for correct
puncturing. Purely move the code first so later changes are
easier to review.

Link: https://msgid.link/20240129194108.1ca184427c76.I077deb8d52c4648eac145b63f88b6c5a3b920ddc@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/chan.c

@@ -56,6 +56,75 @@ void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
 }
 EXPORT_SYMBOL(cfg80211_chandef_create);
 
+struct cfg80211_per_bw_puncturing_values {
+	u8 len;
+	const u16 *valid_values;
+};
+
+static const u16 puncturing_values_80mhz[] = {
+	0x8, 0x4, 0x2, 0x1
+};
+
+static const u16 puncturing_values_160mhz[] = {
+	 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3
+};
+
+static const u16 puncturing_values_320mhz[] = {
+	0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00,
+	0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f,
+	0x300f, 0xc0f, 0x30f, 0xcf, 0x3f
+};
+
+#define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \
+	{ \
+		.len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \
+		.valid_values = puncturing_values_ ## _bw ## mhz \
+	}
+
+static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = {
+	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80),
+	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160),
+	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320)
+};
+
+bool cfg80211_valid_disable_subchannel_bitmap(u16 *bitmap,
+					      const struct cfg80211_chan_def *chandef)
+{
+	u32 idx, i, start_freq;
+
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_80:
+		idx = 0;
+		start_freq = chandef->center_freq1 - 40;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		idx = 1;
+		start_freq = chandef->center_freq1 - 80;
+		break;
+	case NL80211_CHAN_WIDTH_320:
+		idx = 2;
+		start_freq = chandef->center_freq1 - 160;
+		break;
+	default:
+		*bitmap = 0;
+		break;
+	}
+
+	if (!*bitmap)
+		return true;
+
+	/* check if primary channel is punctured */
+	if (*bitmap & (u16)BIT((chandef->chan->center_freq - start_freq) / 20))
+		return false;
+
+	for (i = 0; i < per_bw_puncturing[idx].len; i++)
+		if (per_bw_puncturing[idx].valid_values[i] == *bitmap)
+			return true;
+
+	return false;
+}
+EXPORT_SYMBOL(cfg80211_valid_disable_subchannel_bitmap);
+
 static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef)
 {
 	int max_contiguous = 0;
@@ -1532,72 +1601,3 @@ struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev,
 	}
 }
 EXPORT_SYMBOL(wdev_chandef);
-
-struct cfg80211_per_bw_puncturing_values {
-	u8 len;
-	const u16 *valid_values;
-};
-
-static const u16 puncturing_values_80mhz[] = {
-	0x8, 0x4, 0x2, 0x1
-};
-
-static const u16 puncturing_values_160mhz[] = {
-	 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3
-};
-
-static const u16 puncturing_values_320mhz[] = {
-	0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00,
-	0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f,
-	0x300f, 0xc0f, 0x30f, 0xcf, 0x3f
-};
-
-#define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \
-	{ \
-		.len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \
-		.valid_values = puncturing_values_ ## _bw ## mhz \
-	}
-
-static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = {
-	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80),
-	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160),
-	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320)
-};
-
-bool cfg80211_valid_disable_subchannel_bitmap(u16 *bitmap,
-					      const struct cfg80211_chan_def *chandef)
-{
-	u32 idx, i, start_freq;
-
-	switch (chandef->width) {
-	case NL80211_CHAN_WIDTH_80:
-		idx = 0;
-		start_freq = chandef->center_freq1 - 40;
-		break;
-	case NL80211_CHAN_WIDTH_160:
-		idx = 1;
-		start_freq = chandef->center_freq1 - 80;
-		break;
-	case NL80211_CHAN_WIDTH_320:
-		idx = 2;
-		start_freq = chandef->center_freq1 - 160;
-		break;
-	default:
-		*bitmap = 0;
-		break;
-	}
-
-	if (!*bitmap)
-		return true;
-
-	/* check if primary channel is punctured */
-	if (*bitmap & (u16)BIT((chandef->chan->center_freq - start_freq) / 20))
-		return false;
-
-	for (i = 0; i < per_bw_puncturing[idx].len; i++)
-		if (per_bw_puncturing[idx].valid_values[i] == *bitmap)
-			return true;
-
-	return false;
-}
-EXPORT_SYMBOL(cfg80211_valid_disable_subchannel_bitmap);