#include <net/ieee80211_radiotap.h>
#include "ieee80211_i.h"
+#include "driver-ops.h"
#include "led.h"
#include "mesh.h"
#include "wep.h"
static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
struct tid_ampdu_rx *tid_agg_rx,
struct sk_buff *skb,
+ struct ieee80211_rx_status *status,
u16 mpdu_seq_num,
int bar_req);
/*
atomic_inc(&sdata->bss->num_sta_ps);
set_and_clear_sta_flags(sta, WLAN_STA_PS, WLAN_STA_PSPOLL);
- if (local->ops->sta_notify)
- local->ops->sta_notify(local_to_hw(local), &sdata->vif,
- STA_NOTIFY_SLEEP, &sta->sta);
+ drv_sta_notify(local, &sdata->vif, STA_NOTIFY_SLEEP, &sta->sta);
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
sdata->dev->name, sta->sta.addr, sta->sta.aid);
atomic_dec(&sdata->bss->num_sta_ps);
clear_sta_flags(sta, WLAN_STA_PS | WLAN_STA_PSPOLL);
- if (local->ops->sta_notify)
- local->ops->sta_notify(local_to_hw(local), &sdata->vif,
- STA_NOTIFY_AWAKE, &sta->sta);
+ drv_sta_notify(local, &sdata->vif, STA_NOTIFY_AWAKE, &sta->sta);
if (!skb_queue_empty(&sta->ps_tx_buf))
sta_info_clear_tim_bit(sta);
* mac80211. That also explains the __skb_push()
* below.
*/
- align = (unsigned long)skb->data & 4;
+ align = (unsigned long)skb->data & 3;
if (align) {
if (WARN_ON(skb_headroom(skb) < 3)) {
dev_kfree_skb(skb);
/* manage reordering buffer according to requested */
/* sequence number */
rcu_read_lock();
- ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL,
+ ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL, NULL,
start_seq_num, 1);
rcu_read_unlock();
return RX_DROP_UNUSABLE;
!ieee80211_is_auth(hdr->frame_control))
goto ignore;
- mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr);
+ mac80211_ev_michael_mic_failure(rx->sdata, keyidx, hdr, NULL);
ignore:
dev_kfree_skb(rx->skb);
rx->skb = NULL;
}
+static void ieee80211_release_reorder_frame(struct ieee80211_hw *hw,
+ struct tid_ampdu_rx *tid_agg_rx,
+ int index)
+{
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_rate *rate;
+ struct ieee80211_rx_status status;
+
+ if (!tid_agg_rx->reorder_buf[index])
+ goto no_frame;
+
+ /* release the reordered frames to stack */
+ memcpy(&status, tid_agg_rx->reorder_buf[index]->cb, sizeof(status));
+ sband = hw->wiphy->bands[status.band];
+ if (status.flag & RX_FLAG_HT)
+ rate = sband->bitrates; /* TODO: HT rates */
+ else
+ rate = &sband->bitrates[status.rate_idx];
+ __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index],
+ &status, rate);
+ tid_agg_rx->stored_mpdu_num--;
+ tid_agg_rx->reorder_buf[index] = NULL;
+
+no_frame:
+ tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
+}
+
+
+/*
+ * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If
+ * the skb was added to the buffer longer than this time ago, the earlier
+ * frames that have not yet been received are assumed to be lost and the skb
+ * can be released for processing. This may also release other skb's from the
+ * reorder buffer if there are no additional gaps between the frames.
+ */
+#define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10)
+
/*
* As it function blongs to Rx path it must be called with
* the proper rcu_read_lock protection for its flow.
static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
struct tid_ampdu_rx *tid_agg_rx,
struct sk_buff *skb,
+ struct ieee80211_rx_status *rxstatus,
u16 mpdu_seq_num,
int bar_req)
{
- struct ieee80211_local *local = hw_to_local(hw);
- struct ieee80211_rx_status status;
u16 head_seq_num, buf_size;
int index;
- struct ieee80211_supported_band *sband;
- struct ieee80211_rate *rate;
buf_size = tid_agg_rx->buf_size;
head_seq_num = tid_agg_rx->head_seq_num;
index = seq_sub(tid_agg_rx->head_seq_num,
tid_agg_rx->ssn)
% tid_agg_rx->buf_size;
-
- if (tid_agg_rx->reorder_buf[index]) {
- /* release the reordered frames to stack */
- memcpy(&status,
- tid_agg_rx->reorder_buf[index]->cb,
- sizeof(status));
- sband = local->hw.wiphy->bands[status.band];
- if (status.flag & RX_FLAG_HT) {
- /* TODO: HT rates */
- rate = sband->bitrates;
- } else {
- rate = &sband->bitrates
- [status.rate_idx];
- }
- __ieee80211_rx_handle_packet(hw,
- tid_agg_rx->reorder_buf[index],
- &status, rate);
- tid_agg_rx->stored_mpdu_num--;
- tid_agg_rx->reorder_buf[index] = NULL;
- }
- tid_agg_rx->head_seq_num =
- seq_inc(tid_agg_rx->head_seq_num);
+ ieee80211_release_reorder_frame(hw, tid_agg_rx,
+ index);
}
if (bar_req)
return 1;
/* put the frame in the reordering buffer */
tid_agg_rx->reorder_buf[index] = skb;
+ tid_agg_rx->reorder_time[index] = jiffies;
+ memcpy(tid_agg_rx->reorder_buf[index]->cb, rxstatus,
+ sizeof(*rxstatus));
tid_agg_rx->stored_mpdu_num++;
/* release the buffer until next missing frame */
index = seq_sub(tid_agg_rx->head_seq_num, tid_agg_rx->ssn)
% tid_agg_rx->buf_size;
- while (tid_agg_rx->reorder_buf[index]) {
- /* release the reordered frame back to stack */
- memcpy(&status, tid_agg_rx->reorder_buf[index]->cb,
- sizeof(status));
- sband = local->hw.wiphy->bands[status.band];
- if (status.flag & RX_FLAG_HT)
- rate = sband->bitrates; /* TODO: HT rates */
- else
- rate = &sband->bitrates[status.rate_idx];
- __ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index],
- &status, rate);
- tid_agg_rx->stored_mpdu_num--;
- tid_agg_rx->reorder_buf[index] = NULL;
- tid_agg_rx->head_seq_num = seq_inc(tid_agg_rx->head_seq_num);
+ if (!tid_agg_rx->reorder_buf[index] &&
+ tid_agg_rx->stored_mpdu_num > 1) {
+ /*
+ * No buffers ready to be released, but check whether any
+ * frames in the reorder buffer have timed out.
+ */
+ int j;
+ int skipped = 1;
+ for (j = (index + 1) % tid_agg_rx->buf_size; j != index;
+ j = (j + 1) % tid_agg_rx->buf_size) {
+ if (tid_agg_rx->reorder_buf[j] == NULL) {
+ skipped++;
+ continue;
+ }
+ if (!time_after(jiffies, tid_agg_rx->reorder_time[j] +
+ HZ / 10))
+ break;
+
+#ifdef CONFIG_MAC80211_HT_DEBUG
+ if (net_ratelimit())
+ printk(KERN_DEBUG "%s: release an RX reorder "
+ "frame due to timeout on earlier "
+ "frames\n",
+ wiphy_name(hw->wiphy));
+#endif
+ ieee80211_release_reorder_frame(hw, tid_agg_rx, j);
+
+ /*
+ * Increment the head seq# also for the skipped slots.
+ */
+ tid_agg_rx->head_seq_num =
+ (tid_agg_rx->head_seq_num + skipped) &
+ SEQ_MASK;
+ skipped = 0;
+ }
+ } else while (tid_agg_rx->reorder_buf[index]) {
+ ieee80211_release_reorder_frame(hw, tid_agg_rx, index);
index = seq_sub(tid_agg_rx->head_seq_num,
tid_agg_rx->ssn) % tid_agg_rx->buf_size;
}
}
static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local,
- struct sk_buff *skb)
+ struct sk_buff *skb,
+ struct ieee80211_rx_status *status)
{
struct ieee80211_hw *hw = &local->hw;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
/* according to mpdu sequence number deal with reordering buffer */
mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4;
- ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb,
+ ret = ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, skb, status,
mpdu_seq_num, 0);
end_reorder:
return ret;
return;
}
- if (!ieee80211_rx_reorder_ampdu(local, skb))
+ /*
+ * In theory, the block ack reordering should happen after duplicate
+ * removal (ieee80211_rx_h_check(), which is an RX handler). As such,
+ * the call to ieee80211_rx_reorder_ampdu() should really be moved to
+ * happen as a new RX handler between ieee80211_rx_h_check and
+ * ieee80211_rx_h_decrypt. This cleanup may eventually happen, but for
+ * the time being, the call can be here since RX reorder buf processing
+ * will implicitly skip duplicates. We could, in theory at least,
+ * process frames that ieee80211_rx_h_passive_scan would drop (e.g.,
+ * frames from other than operational channel), but that should not
+ * happen in normal networks.
+ */
+ if (!ieee80211_rx_reorder_ampdu(local, skb, status))
__ieee80211_rx_handle_packet(hw, skb, status, rate);
rcu_read_unlock();
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