xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac80211: add support for Rx reordering offloading

Browse Source 
Some drivers may be performing most of Tx/Rx
aggregation on their own (e.g. in firmware)
including AddBa/DelBa negotiations but may
otherwise require Rx reordering assistance.

The patch exports 2 new functions for establishing
Rx aggregation sessions in assumption device
driver has taken care of the necessary
negotiations.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
[fix endian bug]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michal Kazior
2014-07-16 12:12:15 +02:00
committed by Johannes Berg
parent 83eb935ec7
commit 08cf42e843
4 changed files with 152 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
net/mac80211/agg-rx.c
View File

@@ -224,28 +224,15 @@ static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *d
ieee80211_tx_skb(sdata, skb);
}
void ieee80211_process_addba_request(struct ieee80211_local *local,
struct sta_info *sta,
struct ieee80211_mgmt *mgmt,
size_t len)
void __ieee80211_start_rx_ba_session(struct sta_info *sta,
u8 dialog_token, u16 timeout,
u16 start_seq_num, u16 ba_policy, u16 tid,
u16 buf_size, bool tx)
{
struct ieee80211_local *local = sta->sdata->local;
struct tid_ampdu_rx *tid_agg_rx;
u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
u8 dialog_token;
int i, ret = -EOPNOTSUPP;
/* extract session parameters from addba request frame */
dialog_token = mgmt->u.action.u.addba_req.dialog_token;
timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
start_seq_num =
le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
status = WLAN_STATUS_REQUEST_DECLINED;
u16 status = WLAN_STATUS_REQUEST_DECLINED;
if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
ht_dbg(sta->sdata,
@@ -264,7 +251,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
status = WLAN_STATUS_INVALID_QOS_PARAM;
ht_dbg_ratelimited(sta->sdata,
"AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n",
mgmt->sa, tid, ba_policy, buf_size);
sta->sta.addr, tid, ba_policy, buf_size);
goto end_no_lock;
}
/* determine default buffer size */
@@ -281,7 +268,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
if (sta->ampdu_mlme.tid_rx[tid]) {
ht_dbg_ratelimited(sta->sdata,
"unexpected AddBA Req from %pM on tid %u\n",
mgmt->sa, tid);
sta->sta.addr, tid);
/* delete existing Rx BA session on the same tid */
___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
@@ -353,6 +340,74 @@ end:
mutex_unlock(&sta->ampdu_mlme.mtx);
end_no_lock:
ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
dialog_token, status, 1, buf_size, timeout);
if (tx)
ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
dialog_token, status, 1, buf_size,
timeout);
}
void ieee80211_process_addba_request(struct ieee80211_local *local,
struct sta_info *sta,
struct ieee80211_mgmt *mgmt,
size_t len)
{
u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num;
u8 dialog_token;
/* extract session parameters from addba request frame */
dialog_token = mgmt->u.action.u.addba_req.dialog_token;
timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
start_seq_num =
le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
__ieee80211_start_rx_ba_session(sta, dialog_token, timeout,
start_seq_num, ba_policy, tid,
buf_size, true);
}
void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif,
const u8 *addr, u16 tid)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_local *local = sdata->local;
struct ieee80211_rx_agg *rx_agg;
struct sk_buff *skb = dev_alloc_skb(0);
if (unlikely(!skb))
return;
rx_agg = (struct ieee80211_rx_agg *) &skb->cb;
memcpy(&rx_agg->addr, addr, ETH_ALEN);
rx_agg->tid = tid;
skb->pkt_type = IEEE80211_SDATA_QUEUE_RX_AGG_START;
skb_queue_tail(&sdata->skb_queue, skb);
ieee80211_queue_work(&local->hw, &sdata->work);
}
EXPORT_SYMBOL(ieee80211_start_rx_ba_session_offl);
void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif,
const u8 *addr, u16 tid)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_local *local = sdata->local;
struct ieee80211_rx_agg *rx_agg;
struct sk_buff *skb = dev_alloc_skb(0);
if (unlikely(!skb))
return;
rx_agg = (struct ieee80211_rx_agg *) &skb->cb;
memcpy(&rx_agg->addr, addr, ETH_ALEN);
rx_agg->tid = tid;
skb->pkt_type = IEEE80211_SDATA_QUEUE_RX_AGG_STOP;
skb_queue_tail(&sdata->skb_queue, skb);
ieee80211_queue_work(&local->hw, &sdata->work);
}
EXPORT_SYMBOL(ieee80211_stop_rx_ba_session_offl);