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From:   Lorenzo Bianconi <lorenzo@kernel.org>
To:     nbd@nbd.name
Cc:     lorenzo.bianconi@redhat.com, linux-wireless@vger.kernel.org,
        sgruszka@redhat.com
Subject: [PATCH] mt76: mt76x02u: enable multi-vif support
Date:   Fri,  2 Aug 2019 16:36:20 +0200
Message-Id: <3edec94719a37a58576d530bba05dc629dfef2e0.1564750297.git.lorenzo@kernel.org>
MIME-Version: 1.0
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Sender: linux-wireless-owner@vger.kernel.org
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Enable multi-interface support for mt76x02u driver. For the moment
allow max two concurrent interfaces in order to preserve enough room
for ps traffic since we are using beacon slots for it.
I have successfully tested the following configuration:
- AP + STA
- AP0 + AP1

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 .../net/wireless/mediatek/mt76/mt76x02_util.c | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
index fa45ed280ab1..476f0157a370 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
@@ -61,6 +61,20 @@ static const struct ieee80211_iface_limit mt76x02_if_limits[] = {
 	 },
 };
 
+static const struct ieee80211_iface_limit mt76x02u_if_limits[] = {
+	{
+		.max = 1,
+		.types = BIT(NL80211_IFTYPE_ADHOC)
+	}, {
+		.max = 2,
+		.types = BIT(NL80211_IFTYPE_STATION) |
+#ifdef CONFIG_MAC80211_MESH
+			 BIT(NL80211_IFTYPE_MESH_POINT) |
+#endif
+			 BIT(NL80211_IFTYPE_AP)
+	},
+};
+
 static const struct ieee80211_iface_combination mt76x02_if_comb[] = {
 	{
 		.limits = mt76x02_if_limits,
@@ -75,6 +89,16 @@ static const struct ieee80211_iface_combination mt76x02_if_comb[] = {
 	}
 };
 
+static const struct ieee80211_iface_combination mt76x02u_if_comb[] = {
+	{
+		.limits = mt76x02u_if_limits,
+		.n_limits = ARRAY_SIZE(mt76x02u_if_limits),
+		.max_interfaces = 2,
+		.num_different_channels = 1,
+		.beacon_int_infra_match = true,
+	}
+};
+
 static void
 mt76x02_led_set_config(struct mt76_dev *mdev, u8 delay_on,
 		       u8 delay_off)
@@ -151,6 +175,8 @@ void mt76x02_init_device(struct mt76x02_dev *dev)
 	if (mt76_is_usb(dev)) {
 		hw->extra_tx_headroom += sizeof(struct mt76x02_txwi) +
 					 MT_DMA_HDR_LEN;
+		wiphy->iface_combinations = mt76x02u_if_comb;
+		wiphy->n_iface_combinations = ARRAY_SIZE(mt76x02u_if_comb);
 	} else {
 		INIT_DELAYED_WORK(&dev->wdt_work, mt76x02_wdt_work);
 
-- 
2.21.0