[][MAC80211][Change MT76 Makefile and add bersa support]
[Description]
Change MT76 Makefile and add bersa support
[Release-log]
N/A
Change-Id: Iecb0e9968c8e212a6ab92698c84d2e3a56dbd65b
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5809192
diff --git a/autobuild_mac80211_release/mt7986_bersa_mac80211/package/kernel/mt76/src/agg-rx.c b/autobuild_mac80211_release/mt7986_bersa_mac80211/package/kernel/mt76/src/agg-rx.c
new file mode 100644
index 0000000..7262222
--- /dev/null
+++ b/autobuild_mac80211_release/mt7986_bersa_mac80211/package/kernel/mt76/src/agg-rx.c
@@ -0,0 +1,301 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ */
+#include "mt76.h"
+
+static unsigned long mt76_aggr_tid_to_timeo(u8 tidno)
+{
+ /* Currently voice traffic (AC_VO) always runs without aggregation,
+ * no special handling is needed. AC_BE/AC_BK use tids 0-3. Just check
+ * for non AC_BK/AC_BE and set smaller timeout for it. */
+ return HZ / (tidno >= 4 ? 25 : 10);
+}
+
+static void
+mt76_aggr_release(struct mt76_rx_tid *tid, struct sk_buff_head *frames, int idx)
+{
+ struct sk_buff *skb;
+
+ tid->head = ieee80211_sn_inc(tid->head);
+
+ skb = tid->reorder_buf[idx];
+ if (!skb)
+ return;
+
+ tid->reorder_buf[idx] = NULL;
+ tid->nframes--;
+ __skb_queue_tail(frames, skb);
+}
+
+static void
+mt76_rx_aggr_release_frames(struct mt76_rx_tid *tid,
+ struct sk_buff_head *frames,
+ u16 head)
+{
+ int idx;
+
+ while (ieee80211_sn_less(tid->head, head)) {
+ idx = tid->head % tid->size;
+ mt76_aggr_release(tid, frames, idx);
+ }
+}
+
+static void
+mt76_rx_aggr_release_head(struct mt76_rx_tid *tid, struct sk_buff_head *frames)
+{
+ int idx = tid->head % tid->size;
+
+ while (tid->reorder_buf[idx]) {
+ mt76_aggr_release(tid, frames, idx);
+ idx = tid->head % tid->size;
+ }
+}
+
+static void
+mt76_rx_aggr_check_release(struct mt76_rx_tid *tid, struct sk_buff_head *frames)
+{
+ struct mt76_rx_status *status;
+ struct sk_buff *skb;
+ int start, idx, nframes;
+
+ if (!tid->nframes)
+ return;
+
+ mt76_rx_aggr_release_head(tid, frames);
+
+ start = tid->head % tid->size;
+ nframes = tid->nframes;
+
+ for (idx = (tid->head + 1) % tid->size;
+ idx != start && nframes;
+ idx = (idx + 1) % tid->size) {
+ skb = tid->reorder_buf[idx];
+ if (!skb)
+ continue;
+
+ nframes--;
+ status = (struct mt76_rx_status *)skb->cb;
+ if (!time_after32(jiffies,
+ status->reorder_time +
+ mt76_aggr_tid_to_timeo(tid->num)))
+ continue;
+
+ mt76_rx_aggr_release_frames(tid, frames, status->seqno);
+ }
+
+ mt76_rx_aggr_release_head(tid, frames);
+}
+
+static void
+mt76_rx_aggr_reorder_work(struct work_struct *work)
+{
+ struct mt76_rx_tid *tid = container_of(work, struct mt76_rx_tid,
+ reorder_work.work);
+ struct mt76_dev *dev = tid->dev;
+ struct sk_buff_head frames;
+ int nframes;
+
+ __skb_queue_head_init(&frames);
+
+ local_bh_disable();
+ rcu_read_lock();
+
+ spin_lock(&tid->lock);
+ mt76_rx_aggr_check_release(tid, &frames);
+ nframes = tid->nframes;
+ spin_unlock(&tid->lock);
+
+ if (nframes)
+ ieee80211_queue_delayed_work(tid->dev->hw, &tid->reorder_work,
+ mt76_aggr_tid_to_timeo(tid->num));
+ mt76_rx_complete(dev, &frames, NULL);
+
+ rcu_read_unlock();
+ local_bh_enable();
+}
+
+static void
+mt76_rx_aggr_check_ctl(struct sk_buff *skb, struct sk_buff_head *frames)
+{
+ struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+ struct ieee80211_bar *bar = mt76_skb_get_hdr(skb);
+ struct mt76_wcid *wcid = status->wcid;
+ struct mt76_rx_tid *tid;
+ u8 tidno = status->qos_ctl & IEEE80211_QOS_CTL_TID_MASK;
+ u16 seqno;
+
+ if (!ieee80211_is_ctl(bar->frame_control))
+ return;
+
+ if (!ieee80211_is_back_req(bar->frame_control))
+ return;
+
+ status->qos_ctl = tidno = le16_to_cpu(bar->control) >> 12;
+ seqno = IEEE80211_SEQ_TO_SN(le16_to_cpu(bar->start_seq_num));
+ tid = rcu_dereference(wcid->aggr[tidno]);
+ if (!tid)
+ return;
+
+ spin_lock_bh(&tid->lock);
+ if (!tid->stopped) {
+ mt76_rx_aggr_release_frames(tid, frames, seqno);
+ mt76_rx_aggr_release_head(tid, frames);
+ }
+ spin_unlock_bh(&tid->lock);
+}
+
+void mt76_rx_aggr_reorder(struct sk_buff *skb, struct sk_buff_head *frames)
+{
+ struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+ struct mt76_wcid *wcid = status->wcid;
+ struct ieee80211_sta *sta;
+ struct mt76_rx_tid *tid;
+ bool sn_less;
+ u16 seqno, head, size, idx;
+ u8 tidno = status->qos_ctl & IEEE80211_QOS_CTL_TID_MASK;
+ u8 ackp;
+
+ __skb_queue_tail(frames, skb);
+
+ sta = wcid_to_sta(wcid);
+ if (!sta)
+ return;
+
+ if (!status->aggr && !(status->flag & RX_FLAG_8023)) {
+ mt76_rx_aggr_check_ctl(skb, frames);
+ return;
+ }
+
+ /* not part of a BA session */
+ ackp = status->qos_ctl & IEEE80211_QOS_CTL_ACK_POLICY_MASK;
+ if (ackp != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
+ ackp != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL)
+ return;
+
+ tid = rcu_dereference(wcid->aggr[tidno]);
+ if (!tid)
+ return;
+
+ status->flag |= RX_FLAG_DUP_VALIDATED;
+ spin_lock_bh(&tid->lock);
+
+ if (tid->stopped)
+ goto out;
+
+ head = tid->head;
+ seqno = status->seqno;
+ size = tid->size;
+ sn_less = ieee80211_sn_less(seqno, head);
+
+ if (!tid->started) {
+ if (sn_less)
+ goto out;
+
+ tid->started = true;
+ }
+
+ if (sn_less) {
+ __skb_unlink(skb, frames);
+ dev_kfree_skb(skb);
+ goto out;
+ }
+
+ if (seqno == head) {
+ tid->head = ieee80211_sn_inc(head);
+ if (tid->nframes)
+ mt76_rx_aggr_release_head(tid, frames);
+ goto out;
+ }
+
+ __skb_unlink(skb, frames);
+
+ /*
+ * Frame sequence number exceeds buffering window, free up some space
+ * by releasing previous frames
+ */
+ if (!ieee80211_sn_less(seqno, head + size)) {
+ head = ieee80211_sn_inc(ieee80211_sn_sub(seqno, size));
+ mt76_rx_aggr_release_frames(tid, frames, head);
+ }
+
+ idx = seqno % size;
+
+ /* Discard if the current slot is already in use */
+ if (tid->reorder_buf[idx]) {
+ dev_kfree_skb(skb);
+ goto out;
+ }
+
+ status->reorder_time = jiffies;
+ tid->reorder_buf[idx] = skb;
+ tid->nframes++;
+ mt76_rx_aggr_release_head(tid, frames);
+
+ ieee80211_queue_delayed_work(tid->dev->hw, &tid->reorder_work,
+ mt76_aggr_tid_to_timeo(tid->num));
+
+out:
+ spin_unlock_bh(&tid->lock);
+}
+
+int mt76_rx_aggr_start(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tidno,
+ u16 ssn, u16 size)
+{
+ struct mt76_rx_tid *tid;
+
+ mt76_rx_aggr_stop(dev, wcid, tidno);
+
+ tid = kzalloc(struct_size(tid, reorder_buf, size), GFP_KERNEL);
+ if (!tid)
+ return -ENOMEM;
+
+ tid->dev = dev;
+ tid->head = ssn;
+ tid->size = size;
+ tid->num = tidno;
+ INIT_DELAYED_WORK(&tid->reorder_work, mt76_rx_aggr_reorder_work);
+ spin_lock_init(&tid->lock);
+
+ rcu_assign_pointer(wcid->aggr[tidno], tid);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mt76_rx_aggr_start);
+
+static void mt76_rx_aggr_shutdown(struct mt76_dev *dev, struct mt76_rx_tid *tid)
+{
+ u16 size = tid->size;
+ int i;
+
+ spin_lock_bh(&tid->lock);
+
+ tid->stopped = true;
+ for (i = 0; tid->nframes && i < size; i++) {
+ struct sk_buff *skb = tid->reorder_buf[i];
+
+ if (!skb)
+ continue;
+
+ tid->reorder_buf[i] = NULL;
+ tid->nframes--;
+ dev_kfree_skb(skb);
+ }
+
+ spin_unlock_bh(&tid->lock);
+
+ cancel_delayed_work_sync(&tid->reorder_work);
+}
+
+void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tidno)
+{
+ struct mt76_rx_tid *tid = NULL;
+
+ tid = rcu_replace_pointer(wcid->aggr[tidno], tid,
+ lockdep_is_held(&dev->mutex));
+ if (tid) {
+ mt76_rx_aggr_shutdown(dev, tid);
+ kfree_rcu(tid, rcu_head);
+ }
+}
+EXPORT_SYMBOL_GPL(mt76_rx_aggr_stop);