[PATCH 3/8] mt76: mt7915: enable offloading of sequence number assignment

Felix Fietkau
2020-08-12T10:28:35Z

Preparation for supporting more offload features

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
.../net/wireless/mediatek/mt76/mt7915/mac.c | 49 +++++++++++++------
.../net/wireless/mediatek/mt76/mt7915/main.c | 1 -
2 files changed, 33 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 06371d694618..dde1c93d6701 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -565,6 +565,7 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
bool multicast = is_multicast_ether_addr(hdr->addr1);
struct ieee80211_vif *vif = info->control.vif;
struct mt76_phy *mphy = &dev->mphy;
@@ -572,6 +573,7 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
u8 fc_type, fc_stype, p_fmt, q_idx, omac_idx = 0, wmm_idx = 0;
__le16 fc = hdr->frame_control;
u16 tx_count = 15, seqno = 0;
+ u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
u32 val;

if (vif) {
@@ -587,6 +589,10 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
fc_type = (le16_to_cpu(fc) & IEEE80211_FCTL_FTYPE) >> 2;
fc_stype = (le16_to_cpu(fc) & IEEE80211_FCTL_STYPE) >> 4;

+ txwi[4] = 0;
+ txwi[5] = 0;
+ txwi[6] = 0;
+
if (beacon) {
p_fmt = MT_TX_TYPE_FW;
q_idx = MT_LMAC_BCN0;
@@ -599,6 +605,20 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
mt7915_lmac_mapping(dev, skb_get_queue_mapping(skb));
}

+ if (ieee80211_is_action(fc) &&
+ mgmt->u.action.category == WLAN_CATEGORY_BACK &&
+ mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ) {
+ u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
+
+ txwi[5] |= cpu_to_le32(MT_TXD5_ADD_BA);
+ tid = (capab >> 2) & IEEE80211_QOS_CTL_TID_MASK;
+ } else if (ieee80211_is_back_req(hdr->frame_control)) {
+ struct ieee80211_bar *bar = (struct ieee80211_bar *)hdr;
+ u16 control = le16_to_cpu(bar->control);
+
+ tid = FIELD_GET(IEEE80211_BAR_CTRL_TID_INFO_MASK, control);
+ }
+
val = FIELD_PREP(MT_TXD0_TX_BYTES, skb->len + MT_TXD_SIZE) |
FIELD_PREP(MT_TXD0_PKT_FMT, p_fmt) |
FIELD_PREP(MT_TXD0_Q_IDX, q_idx);
@@ -609,8 +629,7 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
FIELD_PREP(MT_TXD1_HDR_FORMAT, MT_HDR_FORMAT_802_11) |
FIELD_PREP(MT_TXD1_HDR_INFO,
ieee80211_get_hdrlen_from_skb(skb) / 2) |
- FIELD_PREP(MT_TXD1_TID,
- skb->priority & IEEE80211_QOS_CTL_TID_MASK) |
+ FIELD_PREP(MT_TXD1_TID, tid) |
FIELD_PREP(MT_TXD1_OWN_MAC, omac_idx);

if (ext_phy && q_idx >= MT_LMAC_ALTX0 && q_idx <= MT_LMAC_BCN0)
@@ -634,10 +653,6 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
}
txwi[2] = cpu_to_le32(val);

- txwi[4] = 0;
- txwi[5] = 0;
- txwi[6] = 0;
-
if (!ieee80211_is_data(fc) || multicast) {
u16 rate;

@@ -668,17 +683,19 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
txwi[7] = cpu_to_le32(val);

val = FIELD_PREP(MT_TXD3_REM_TX_COUNT, tx_count);
- if (ieee80211_is_data_qos(fc)) {
- seqno = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
- val |= MT_TXD3_SN_VALID;
- } else if (ieee80211_is_back_req(fc)) {
- struct ieee80211_bar *bar;
-
- bar = (struct ieee80211_bar *)skb->data;
- seqno = IEEE80211_SEQ_TO_SN(le16_to_cpu(bar->start_seq_num));
- val |= MT_TXD3_SN_VALID;
+ if (info->flags & IEEE80211_TX_CTL_INJECTED) {
+ seqno = le16_to_cpu(hdr->seq_ctrl);
+
+ if (ieee80211_is_back_req(hdr->frame_control)) {
+ struct ieee80211_bar *bar;
+
+ bar = (struct ieee80211_bar *)skb->data;
+ seqno = le16_to_cpu(bar->start_seq_num);
+ }
+
+ val |= MT_TXD3_SN_VALID |
+ FIELD_PREP(MT_TXD3_SEQ, IEEE80211_SEQ_TO_SN(seqno));
}
- val |= FIELD_PREP(MT_TXD3_SEQ, seqno);
txwi[3] |= cpu_to_le32(val);
}

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index 0feea2c33717..9e53f0db87f2 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -620,7 +620,6 @@ mt7915_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
mt7915_mcu_add_tx_ba(dev, params, false);
break;
case IEEE80211_AMPDU_TX_START:
- mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(ssn);
mt7915_set_aggr_state(msta, tid, MT7915_AGGR_START);
ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
break;
--
2.28.0