This is only used for testing for now. In the future it will be possible to
enable the second PHY through an proper API via device tree
Running:
echo 1 > /sys/kernel/debug/ieee80211/phyX/mt76/dbdc
will register a second wiphy (and limit the primary one to 2 spatial streams).
The second wiphy will only be able to run on 5 GHz, while the primary one can
operate in both bands (if supported by the device).
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
v2:
- extend commit message
- fix MAC address of second wiphy
.../wireless/mediatek/mt76/mt7615/debugfs.c | 27 ++++
.../wireless/mediatek/mt76/mt7615/eeprom.c | 5 +-
.../net/wireless/mediatek/mt76/mt7615/init.c | 125 +++++++++++++++---
.../wireless/mediatek/mt76/mt7615/mt7615.h | 4 +
4 files changed, 140 insertions(+), 21 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
index 05a0172b32ce..f75b3f66cdb4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
@@ -36,6 +36,32 @@ mt7615_scs_get(void *data, u64 *val)
DEFINE_DEBUGFS_ATTRIBUTE(fops_scs, mt7615_scs_get,
mt7615_scs_set, "%lld\n");
+static int
+mt7615_dbdc_set(void *data, u64 val)
+{
+ struct mt7615_dev *dev = data;
+
+ if (val)
+ mt7615_register_ext_phy(dev);
+ else
+ mt7615_unregister_ext_phy(dev);
+
+ return 0;
+}
+
+static int
+mt7615_dbdc_get(void *data, u64 *val)
+{
+ struct mt7615_dev *dev = data;
+
+ *val = !!mt7615_ext_phy(dev);
+
+ return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_dbdc, mt7615_dbdc_get,
+ mt7615_dbdc_set, "%lld\n");
+
static int
mt7615_ampdu_stat_read(struct seq_file *file, void *data)
{
@@ -183,6 +209,7 @@ int mt7615_init_debugfs(struct mt7615_dev *dev)
mt7615_queues_acq);
debugfs_create_file("ampdu_stat", 0400, dir, dev, &fops_ampdu_stat);
debugfs_create_file("scs", 0600, dir, dev, &fops_scs);
+ debugfs_create_file("dbdc", 0600, dir, dev, &fops_dbdc);
debugfs_create_devm_seqfile(dev->mt76.dev, "radio", dir,
mt7615_radio_read);
debugfs_create_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
index 61a3fba240ba..e4dcfa531a24 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
@@ -124,8 +124,9 @@ static void mt7615_eeprom_parse_hw_cap(struct mt7615_dev *dev)
if (!tx_mask || tx_mask > max_nss)
tx_mask = max_nss;
- dev->mphy.antenna_mask = BIT(tx_mask) - 1;
- dev->phy.chainmask = dev->mphy.antenna_mask;
+ dev->chainmask = BIT(tx_mask) - 1;
+ dev->mphy.antenna_mask = dev->chainmask;
+ dev->phy.chainmask = dev->chainmask;
}
int mt7615_eeprom_get_power_index(struct mt7615_dev *dev,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/init.c b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
index 78bcdf90ca5e..a14d4d978aad 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
@@ -256,22 +256,10 @@ mt7615_regd_notifier(struct wiphy *wiphy,
mt7615_dfs_init_radar_detector(phy);
}
-int mt7615_register_device(struct mt7615_dev *dev)
+static void
+mt7615_init_wiphy(struct ieee80211_hw *hw)
{
- struct ieee80211_hw *hw = mt76_hw(dev);
struct wiphy *wiphy = hw->wiphy;
- int ret;
-
- dev->phy.dev = dev;
- dev->phy.mt76 = &dev->mt76.phy;
- dev->mt76.phy.priv = &dev->phy;
- INIT_DELAYED_WORK(&dev->mt76.mac_work, mt7615_mac_work);
- INIT_LIST_HEAD(&dev->sta_poll_list);
- spin_lock_init(&dev->sta_poll_lock);
-
- ret = mt7615_init_hardware(dev);
- if (ret)
- return ret;
hw->queues = 4;
hw->max_rates = 3;
@@ -290,13 +278,113 @@ int mt7615_register_device(struct mt7615_dev *dev)
ieee80211_hw_set(hw, TX_STATUS_NO_AMPDU_LEN);
+ hw->max_tx_fragments = MT_TXP_MAX_BUF_NUM;
+}
+
+static void
+mt7615_cap_dbdc_enable(struct mt7615_dev *dev)
+{
+ dev->mphy.sband_5g.sband.vht_cap.cap &=
+ ~(IEEE80211_VHT_CAP_SHORT_GI_160 |
+ IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ);
+ if (dev->chainmask == 0xf)
+ dev->mphy.antenna_mask = dev->chainmask >> 2;
+ else
+ dev->mphy.antenna_mask = dev->chainmask >> 1;
+ dev->phy.chainmask = dev->mphy.antenna_mask;
+ mt76_set_stream_caps(&dev->mt76, true);
+}
+
+static void
+mt7615_cap_dbdc_disable(struct mt7615_dev *dev)
+{
+ dev->mphy.sband_5g.sband.vht_cap.cap |=
+ IEEE80211_VHT_CAP_SHORT_GI_160 |
+ IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
+ dev->mphy.antenna_mask = dev->chainmask;
+ dev->phy.chainmask = dev->chainmask;
+ mt76_set_stream_caps(&dev->mt76, true);
+}
+
+int mt7615_register_ext_phy(struct mt7615_dev *dev)
+{
+ struct mt7615_phy *phy = mt7615_ext_phy(dev);
+ struct mt76_phy *mphy;
+ int ret;
+
+ if (test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
+ return -EINVAL;
+
+ if (phy)
+ return 0;
+
+ mt7615_cap_dbdc_enable(dev);
+ mphy = mt76_alloc_phy(&dev->mt76, sizeof(*phy), &mt7615_ops);
+ if (!mphy)
+ return -ENOMEM;
+
+ phy = mphy->priv;
+ phy->dev = dev;
+ phy->mt76 = mphy;
+ phy->chainmask = dev->chainmask & ~dev->phy.chainmask;
+ mphy->antenna_mask = BIT(hweight8(phy->chainmask)) - 1;
+ mt7615_init_wiphy(mphy->hw);
+
+ /*
+ * Make the secondary PHY MAC address local without overlapping with
+ * the usual MAC address allocation scheme on multiple virtual interfaces
+ */
+ mphy->hw->wiphy->perm_addr[0] |= 2;
+ mphy->hw->wiphy->perm_addr[0] ^= BIT(7);
+
+ /* second phy can only handle 5 GHz */
+ mphy->sband_2g.sband.n_channels = 0;
+ mphy->hw->wiphy->bands[NL80211_BAND_2GHZ] = NULL;
+
+ ret = mt76_register_phy(mphy);
+ if (ret)
+ ieee80211_free_hw(mphy->hw);
+
+ return ret;
+}
+
+void mt7615_unregister_ext_phy(struct mt7615_dev *dev)
+{
+ struct mt7615_phy *phy = mt7615_ext_phy(dev);
+ struct mt76_phy *mphy = dev->mt76.phy2;
+
+ if (!phy)
+ return;
+
+ mt7615_cap_dbdc_disable(dev);
+ mt76_unregister_phy(mphy);
+ ieee80211_free_hw(mphy->hw);
+}
+
+
+int mt7615_register_device(struct mt7615_dev *dev)
+{
+ struct ieee80211_hw *hw = mt76_hw(dev);
+ int ret;
+
+ dev->phy.dev = dev;
+ dev->phy.mt76 = &dev->mt76.phy;
+ dev->mt76.phy.priv = &dev->phy;
+ INIT_DELAYED_WORK(&dev->mt76.mac_work, mt7615_mac_work);
+ INIT_LIST_HEAD(&dev->sta_poll_list);
+ spin_lock_init(&dev->sta_poll_lock);
+
+ ret = mt7615_init_hardware(dev);
+ if (ret)
+ return ret;
+
+ mt7615_init_wiphy(hw);
dev->mphy.sband_2g.sband.ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING;
dev->mphy.sband_5g.sband.ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING;
dev->mphy.sband_5g.sband.vht_cap.cap |=
- IEEE80211_VHT_CAP_SHORT_GI_160 |
IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
- IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
- IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
+ IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
+ mt7615_cap_dbdc_disable(dev);
dev->phy.dfs_state = -1;
ret = mt76_register_device(&dev->mt76, true, mt7615_rates,
@@ -307,8 +395,6 @@ int mt7615_register_device(struct mt7615_dev *dev)
mt7615_init_txpower(dev, &dev->mphy.sband_2g.sband);
mt7615_init_txpower(dev, &dev->mphy.sband_5g.sband);
- hw->max_tx_fragments = MT_TXP_MAX_BUF_NUM;
-
return mt7615_init_debugfs(dev);
}
@@ -317,6 +403,7 @@ void mt7615_unregister_device(struct mt7615_dev *dev)
struct mt76_txwi_cache *txwi;
int id;
+ mt7615_unregister_ext_phy(dev);
mt76_unregister_device(&dev->mt76);
mt7615_mcu_exit(dev);
mt7615_dma_cleanup(dev);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
index 2adf3b8a61b8..32f23f5fdd58 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
@@ -115,6 +115,8 @@ struct mt7615_dev {
u32 vif_mask;
u32 omac_mask;
+ u16 chainmask;
+
struct list_head sta_poll_list;
spinlock_t sta_poll_lock;
@@ -211,6 +213,8 @@ u32 mt7615_reg_map(struct mt7615_dev *dev, u32 addr);
int mt7615_register_device(struct mt7615_dev *dev);
void mt7615_unregister_device(struct mt7615_dev *dev);
+int mt7615_register_ext_phy(struct mt7615_dev *dev);
+void mt7615_unregister_ext_phy(struct mt7615_dev *dev);
int mt7615_eeprom_init(struct mt7615_dev *dev);
int mt7615_eeprom_get_power_index(struct mt7615_dev *dev,
struct ieee80211_channel *chan,
--
2.24.0
