[PATCH 2/2] mt76: mt7915: add implicit Tx beamforming support
Ryder Lee
ryder.lee at mediatek.com
Wed Jan 13 07:09:33 EST 2021
Add ht/vht implicit Tx beamforming support and enable it via debugfs.
Tested-by: Shayne Chen <shayne.chen at mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee at mediatek.com>
---
.../wireless/mediatek/mt76/mt7915/debugfs.c | 28 +++++
.../net/wireless/mediatek/mt76/mt7915/init.c | 8 +-
.../net/wireless/mediatek/mt76/mt7915/mcu.c | 104 ++++++++++--------
.../wireless/mediatek/mt76/mt7915/mt7915.h | 1 +
4 files changed, 89 insertions(+), 52 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index 7d810fbf2862..340d489993bb 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -6,6 +6,32 @@
/** global debugfs **/
+static int
+mt7915_implicit_txbf_set(void *data, u64 val)
+{
+ struct mt7915_dev *dev = data;
+
+ if (test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
+ return 0;
+
+ dev->ibf = !!val;
+
+ return mt7915_mcu_set_txbf_type(dev);
+}
+
+static int
+mt7915_implicit_txbf_get(void *data, u64 *val)
+{
+ struct mt7915_dev *dev = data;
+
+ *val = dev->ibf;
+
+ return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_implicit_txbf, mt7915_implicit_txbf_get,
+ mt7915_implicit_txbf_set, "%lld\n");
+
/* test knob of system layer 1/2 error recovery */
static int mt7915_ser_trigger_set(void *data, u64 val)
{
@@ -355,6 +381,8 @@ int mt7915_init_debugfs(struct mt7915_dev *dev)
mt7915_queues_acq);
debugfs_create_file("tx_stats", 0400, dir, dev, &fops_tx_stats);
debugfs_create_file("fw_debug", 0600, dir, dev, &fops_fw_debug);
+ debugfs_create_file("implicit_txbf", 0600, dir, dev,
+ &fops_implicit_txbf);
debugfs_create_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern);
/* test knobs */
debugfs_create_file("radar_trigger", 0200, dir, dev,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 255ccd7e3d27..cb501c5dc1cc 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -169,18 +169,12 @@ static int mt7915_txbf_init(struct mt7915_dev *dev)
{
int ret;
- /*
- * TODO: DBDC & check whether iBF phase calibration data has
- * been stored in eeprom offset 0x651~0x7b8, then write down
- * 0x1111 into 0x651 and 0x651 to trigger iBF.
- */
-
/* trigger sounding packets */
ret = mt7915_mcu_set_txbf_sounding(dev);
if (ret)
return ret;
- /* enable iBF & eBF */
+ /* enable eBF */
return mt7915_mcu_set_txbf_type(dev);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index f38bc421ea8e..2ac780bc2696 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -1736,13 +1736,14 @@ mt7915_mcu_sta_sounding_rate(struct sta_rec_bf *bf)
}
static void
-mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, struct sta_rec_bf *bf)
+mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, struct mt7915_phy *phy,
+ struct sta_rec_bf *bf)
{
struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
u8 n = 0;
bf->tx_mode = MT_PHY_TYPE_HT;
- bf->bf_cap |= MT_IBF;
+ bf->bf_cap = MT_IBF;
if (mcs->tx_params & IEEE80211_HT_MCS_TX_RX_DIFF &&
(mcs->tx_params & IEEE80211_HT_MCS_TX_DEFINED))
@@ -1755,8 +1756,9 @@ mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, struct sta_rec_bf *bf)
else if (mcs->rx_mask[1])
n = 1;
+ bf->nr = hweight8(phy->chainmask) - 1;
bf->nc = min_t(u8, bf->nr, n);
- bf->ibf_ncol = bf->nc;
+ bf->ibf_ncol = n;
if (sta->bandwidth <= IEEE80211_STA_RX_BW_40 && !bf->nc)
bf->ibf_timeout = 0x48;
@@ -1764,34 +1766,46 @@ mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, struct sta_rec_bf *bf)
static void
mt7915_mcu_sta_bfer_vht(struct ieee80211_sta *sta, struct mt7915_phy *phy,
- struct sta_rec_bf *bf)
+ struct sta_rec_bf *bf, bool explicit)
{
struct ieee80211_sta_vht_cap *pc = &sta->vht_cap;
struct ieee80211_sta_vht_cap *vc = &phy->mt76->sband_5g.sband.vht_cap;
- u8 bfee_nr, bfer_nr, n, tx_ant = hweight8(phy->chainmask) - 1;
- u16 mcs_map;
+ u16 mcs_map = le16_to_cpu(pc->vht_mcs.rx_mcs_map);
+ u8 nss_mcs = mt7915_mcu_get_sta_nss(mcs_map);
+ u8 tx_ant = hweight8(phy->chainmask) - 1;
bf->tx_mode = MT_PHY_TYPE_VHT;
- bf->bf_cap |= MT_EBF;
- mt7915_mcu_sta_sounding_rate(bf);
+ if (explicit) {
+ u8 n, bfee_nr, bfer_nr;
- bfee_nr = FIELD_GET(IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK,
- pc->cap);
- bfer_nr = FIELD_GET(IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK,
- vc->cap);
- mcs_map = le16_to_cpu(pc->vht_mcs.rx_mcs_map);
+ bf->bf_cap = MT_EBF;
- n = min_t(u8, bfer_nr, bfee_nr);
- bf->nr = min_t(u8, n, tx_ant);
- n = mt7915_mcu_get_sta_nss(mcs_map);
+ mt7915_mcu_sta_sounding_rate(bf);
- bf->nc = min_t(u8, n, bf->nr);
- bf->ibf_ncol = bf->nc;
+ bfee_nr = FIELD_GET(IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK,
+ pc->cap);
+ bfer_nr = FIELD_GET(IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK,
+ vc->cap);
+ n = min_t(u8, bfer_nr, bfee_nr);
+ bf->nr = min_t(u8, n, tx_ant);
+ bf->nc = min_t(u8, nss_mcs, bf->nr);
+ bf->ibf_ncol = bf->nc;
+
+ if (sta->bandwidth == IEEE80211_STA_RX_BW_160)
+ bf->nr = 1;
+ } else {
+ bf->bf_cap = MT_IBF;
+ bf->nr = tx_ant;
+ bf->nc = min_t(u8, nss_mcs, bf->nr);
+ bf->ibf_ncol = nss_mcs;
+
+ if (sta->bandwidth <= IEEE80211_STA_RX_BW_40 && !bf->nc)
+ bf->ibf_timeout = 0x48;
- /* force nr from 4 to 2 */
- if (sta->bandwidth == IEEE80211_STA_RX_BW_160)
- bf->nr = 1;
+ if (sta->bandwidth == IEEE80211_STA_RX_BW_160)
+ bf->ibf_nrow = 1;
+ }
}
static void
@@ -1800,16 +1814,14 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
{
struct ieee80211_sta_he_cap *pc = &sta->he_cap;
struct ieee80211_he_cap_elem *pe = &pc->he_cap_elem;
- const struct ieee80211_he_cap_elem *ve;
- const struct ieee80211_sta_he_cap *vc;
- u8 bfee_nr, bfer_nr, nss_mcs;
- u16 mcs_map;
-
- vc = mt7915_get_he_phy_cap(phy, vif);
- ve = &vc->he_cap_elem;
+ const struct ieee80211_sta_he_cap *vc = mt7915_get_he_phy_cap(phy, vif);
+ const struct ieee80211_he_cap_elem *ve = &vc->he_cap_elem;
+ u16 mcs_map = le16_to_cpu(pc->he_mcs_nss_supp.rx_mcs_80);
+ u8 nss_mcs = mt7915_mcu_get_sta_nss(mcs_map);
+ u8 bfee_nr, bfer_nr;
bf->tx_mode = MT_PHY_TYPE_HE_SU;
- bf->bf_cap |= MT_EBF;
+ bf->bf_cap = MT_EBF;
mt7915_mcu_sta_sounding_rate(bf);
@@ -1821,10 +1833,6 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
ve->phy_cap_info[5]);
bfee_nr = HE_PHY(CAP4_BEAMFORMEE_MAX_STS_UNDER_80MHZ_MASK,
pe->phy_cap_info[4]);
-
- mcs_map = le16_to_cpu(pc->he_mcs_nss_supp.tx_mcs_80);
- nss_mcs = mt7915_mcu_get_sta_nss(mcs_map);
-
bf->nr = min_t(u8, bfer_nr, bfee_nr);
bf->nc = min_t(u8, nss_mcs, bf->nr);
bf->ibf_ncol = bf->nc;
@@ -1863,7 +1871,7 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
static void
mt7915_mcu_sta_bfer_tlv(struct sk_buff *skb, struct ieee80211_sta *sta,
struct ieee80211_vif *vif, struct mt7915_phy *phy,
- bool enable)
+ bool enable, bool explicit)
{
struct sta_rec_bf *bf;
struct tlv *tlv;
@@ -1885,19 +1893,25 @@ mt7915_mcu_sta_bfer_tlv(struct sk_buff *skb, struct ieee80211_sta *sta,
return;
}
- bf->bw = sta->bandwidth;
- bf->ibf_dbw = sta->bandwidth;
- bf->ibf_nrow = tx_ant;
- bf->ibf_timeout = 0x18;
-
+ /* he: eBF only, in accordance with spec
+ * vht: support eBF and iBF
+ * ht: iBF only, since mac80211 lacks of eBF support
+ */
if (sta->he_cap.has_he)
mt7915_mcu_sta_bfer_he(sta, vif, phy, bf);
else if (sta->vht_cap.vht_supported)
- mt7915_mcu_sta_bfer_vht(sta, phy, bf);
+ mt7915_mcu_sta_bfer_vht(sta, phy, bf, explicit);
else if (sta->ht_cap.ht_supported)
- mt7915_mcu_sta_bfer_ht(sta, bf);
+ mt7915_mcu_sta_bfer_ht(sta, phy, bf);
+ else
+ return;
+
+ bf->bw = sta->bandwidth;
+ bf->ibf_dbw = sta->bandwidth;
+ bf->ibf_nrow = tx_ant;
+ bf->ibf_timeout = 0x18;
- if (bf->bf_cap & MT_EBF && bf->nr != tx_ant)
+ if (explicit && bf->nr != tx_ant)
bf->mem_20m = matrix[tx_ant][bf->nc];
else
bf->mem_20m = matrix[bf->nr][bf->nc];
@@ -2002,14 +2016,14 @@ mt7915_mcu_add_txbf(struct mt7915_dev *dev, struct ieee80211_vif *vif,
/* must keep each tag independent */
/* starec bf */
- if (ebf) {
+ if (ebf || dev->ibf) {
len = sizeof(struct sta_req_hdr) + sizeof(struct sta_rec_bf);
skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta, len);
if (IS_ERR(skb))
return PTR_ERR(skb);
- mt7915_mcu_sta_bfer_tlv(skb, sta, vif, phy, enable);
+ mt7915_mcu_sta_bfer_tlv(skb, sta, vif, phy, enable, ebf);
r = mt76_mcu_skb_send_msg(&dev->mt76, skb,
MCU_EXT_CMD_STA_REC_UPDATE, true);
@@ -3442,7 +3456,7 @@ int mt7915_mcu_set_txbf_type(struct mt7915_dev *dev)
} __packed req = {
.action = MT_BF_TYPE_UPDATE,
.ebf = true,
- .ibf = false,
+ .ibf = dev->ibf,
};
return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_TXBF_ACTION, &req,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index df7ac2cf052f..63ad1f8199f2 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -191,6 +191,7 @@ struct mt7915_dev {
bool dbdc_support;
bool flash_mode;
bool fw_debug;
+ bool ibf;
};
enum {
--
2.18.0
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