diff mbox series

[10/10] wifi: mac80211_hwsim: add support for multi-radio wiphy

Message ID b2f7aea3341e8610880e46d91e984a6e2c14b3f3.1718881762.git-series.nbd@nbd.name
State New
Headers show
Series cfg80211/mac80211: support defining multiple radios per wiphy | expand

Commit Message

Felix Fietkau June 20, 2024, 11:11 a.m. UTC
This registers one wiphy radio per supported band. Number of different
channels is set per radio.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/virtual/mac80211_hwsim.c | 77 +++++++++++++++++---
 drivers/net/wireless/virtual/mac80211_hwsim.h |  3 +-
 2 files changed, 69 insertions(+), 11 deletions(-)

Comments

Johannes Berg June 28, 2024, 8:24 a.m. UTC | #1
On Thu, 2024-06-20 at 13:11 +0200, Felix Fietkau wrote:
> 
> + * @HWSIM_ATTR_MULTI_RADIO: register multiple wiphy radios (one per band).
> + *	Number of supported channels for the phy will be per radio.
> 

This should document that it's a flag.

Also, you didn't add a policy entry in hwsim_genl_policy[]. It may have
worked anyway because that policy doesn't have a .strict_start_type in
[0], so please add that as well and set it to this new attribute.

johannes
diff mbox series

Patch

diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.c b/drivers/net/wireless/virtual/mac80211_hwsim.c
index b5afaec61827..d8dc1a2da72b 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim.c
@@ -69,6 +69,9 @@  static bool mlo;
 module_param(mlo, bool, 0444);
 MODULE_PARM_DESC(mlo, "Support MLO");
 
+static bool multi_radio;
+module_param(multi_radio, bool, 0444);
+MODULE_PARM_DESC(mlo, "Support Multiple Radios per wiphy");
 /**
  * enum hwsim_regtest - the type of regulatory tests we offer
  *
@@ -669,6 +672,10 @@  struct mac80211_hwsim_data {
 	struct ieee80211_iface_limit if_limits[3];
 	int n_if_limits;
 
+	struct ieee80211_iface_combination if_combination_radio;
+	struct wiphy_radio_freq_range radio_range[4];
+	struct wiphy_radio radio[4];
+
 	u32 ciphers[ARRAY_SIZE(hwsim_ciphers)];
 
 	struct mac_address addresses[2];
@@ -4017,6 +4024,7 @@  struct hwsim_new_radio_params {
 	bool reg_strict;
 	bool p2p_device;
 	bool use_chanctx;
+	bool multi_radio;
 	bool destroy_on_close;
 	const char *hwname;
 	bool no_vif;
@@ -4093,6 +4101,12 @@  static int append_radio_msg(struct sk_buff *skb, int id,
 			return ret;
 	}
 
+	if (param->multi_radio) {
+		ret = nla_put_flag(skb, HWSIM_ATTR_MULTI_RADIO);
+		if (ret < 0)
+			return ret;
+	}
+
 	if (param->hwname) {
 		ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
 			      strlen(param->hwname), param->hwname);
@@ -5113,6 +5127,7 @@  static int mac80211_hwsim_new_radio(struct genl_info *info,
 	struct net *net;
 	int idx, i;
 	int n_limits = 0;
+	int n_bands = 0;
 
 	if (WARN_ON(param->channels > 1 && !param->use_chanctx))
 		return -EINVAL;
@@ -5216,22 +5231,22 @@  static int mac80211_hwsim_new_radio(struct genl_info *info,
 		n_limits++;
 	}
 
+	data->if_combination.radar_detect_widths =
+				BIT(NL80211_CHAN_WIDTH_5) |
+				BIT(NL80211_CHAN_WIDTH_10) |
+				BIT(NL80211_CHAN_WIDTH_20_NOHT) |
+				BIT(NL80211_CHAN_WIDTH_20) |
+				BIT(NL80211_CHAN_WIDTH_40) |
+				BIT(NL80211_CHAN_WIDTH_80) |
+				BIT(NL80211_CHAN_WIDTH_160);
+
 	if (data->use_chanctx) {
 		hw->wiphy->max_scan_ssids = 255;
 		hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 		hw->wiphy->max_remain_on_channel_duration = 1000;
-		data->if_combination.radar_detect_widths = 0;
 		data->if_combination.num_different_channels = data->channels;
 	} else {
 		data->if_combination.num_different_channels = 1;
-		data->if_combination.radar_detect_widths =
-					BIT(NL80211_CHAN_WIDTH_5) |
-					BIT(NL80211_CHAN_WIDTH_10) |
-					BIT(NL80211_CHAN_WIDTH_20_NOHT) |
-					BIT(NL80211_CHAN_WIDTH_20) |
-					BIT(NL80211_CHAN_WIDTH_40) |
-					BIT(NL80211_CHAN_WIDTH_80) |
-					BIT(NL80211_CHAN_WIDTH_160);
 	}
 
 	if (!n_limits) {
@@ -5349,6 +5364,9 @@  static int mac80211_hwsim_new_radio(struct genl_info *info,
 
 	for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
 		struct ieee80211_supported_band *sband = &data->bands[band];
+		struct wiphy_radio_freq_range *radio_range;
+		const struct ieee80211_channel *c;
+		struct wiphy_radio *radio;
 
 		sband->band = band;
 
@@ -5422,8 +5440,41 @@  static int mac80211_hwsim_new_radio(struct genl_info *info,
 		mac80211_hwsim_sband_capab(sband);
 
 		hw->wiphy->bands[band] = sband;
+
+		if (!param->multi_radio)
+			continue;
+
+		if (WARN_ON_ONCE(n_bands >= ARRAY_SIZE(data->radio))) {
+			err = -EINVAL;
+			goto failed_hw;
+		}
+
+		c = sband->channels;
+		radio_range = &data->radio_range[n_bands];
+		radio_range->start_freq = ieee80211_channel_to_khz(c) - 10000;
+
+		c += sband->n_channels - 1;
+		radio_range->end_freq = ieee80211_channel_to_khz(c) + 10000;
+
+		radio = &data->radio[n_bands++];
+		radio->freq_range = radio_range;
+		radio->n_freq_range = 1;
+		radio->iface_combinations = &data->if_combination_radio;
+		radio->n_iface_combinations = 1;
+	}
+
+	if (param->multi_radio) {
+		hw->wiphy->radio = data->radio;
+		hw->wiphy->n_radio = n_bands;
+
+		memcpy(&data->if_combination_radio, &data->if_combination,
+		       sizeof(data->if_combination));
+		data->if_combination.num_different_channels *= n_bands;
 	}
 
+	if (data->use_chanctx)
+		data->if_combination.radar_detect_widths = 0;
+
 	/* By default all radios belong to the first group */
 	data->group = 1;
 	mutex_init(&data->mutex);
@@ -6041,6 +6092,9 @@  static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 	else
 		param.use_chanctx = (param.channels > 1);
 
+	if (info->attrs[HWSIM_ATTR_MULTI_RADIO])
+		param.multi_radio = true;
+
 	if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
 		param.reg_alpha2 =
 			nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
@@ -6121,7 +6175,7 @@  static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 
 	param.mlo = info->attrs[HWSIM_ATTR_MLO_SUPPORT];
 
-	if (param.mlo)
+	if (param.mlo || param.multi_radio)
 		param.use_chanctx = true;
 
 	if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
@@ -6815,7 +6869,8 @@  static int __init init_mac80211_hwsim(void)
 
 		param.p2p_device = support_p2p_device;
 		param.mlo = mlo;
-		param.use_chanctx = channels > 1 || mlo;
+		param.multi_radio = multi_radio;
+		param.use_chanctx = channels > 1 || mlo || multi_radio;
 		param.iftypes = HWSIM_IFTYPE_SUPPORT_MASK;
 		if (param.p2p_device)
 			param.iftypes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.h b/drivers/net/wireless/virtual/mac80211_hwsim.h
index 21b1afd83dc1..2a890c4903db 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim.h
+++ b/drivers/net/wireless/virtual/mac80211_hwsim.h
@@ -157,6 +157,8 @@  enum hwsim_commands {
  *	to provide details about peer measurement request (nl80211_peer_measurement_attrs)
  * @HWSIM_ATTR_PMSR_RESULT: nested attributed used with %HWSIM_CMD_REPORT_PMSR
  *	to provide peer measurement result (nl80211_peer_measurement_attrs)
+ * @HWSIM_ATTR_MULTI_RADIO: register multiple wiphy radios (one per band).
+ *	Number of supported channels for the phy will be per radio.
  * @__HWSIM_ATTR_MAX: enum limit
  */
 enum hwsim_attrs {
@@ -189,6 +191,7 @@  enum hwsim_attrs {
 	HWSIM_ATTR_PMSR_SUPPORT,
 	HWSIM_ATTR_PMSR_REQUEST,
 	HWSIM_ATTR_PMSR_RESULT,
+	HWSIM_ATTR_MULTI_RADIO,
 	__HWSIM_ATTR_MAX,
 };
 #define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)