/**
* @brief This function will dispatch all packets sequentially
* from start_win until a hole is found and adjust the
* start_win appropriately
*
* @param priv A pointer to mlan_private
* @param rx_reor_tbl_ptr A pointer to structure RxReorderTbl
*
* @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
*/
static mlan_status
wlan_11n_scan_and_dispatch(t_void * priv, RxReorderTbl * rx_reor_tbl_ptr)
{
int i, j, xchg;
mlan_status ret = MLAN_STATUS_SUCCESS;
void *rx_tmp_ptr = MNULL;
mlan_private *pmpriv = (mlan_private *) priv;
ENTER();
for (i = 0; i < rx_reor_tbl_ptr->win_size; ++i) {
pmpriv->adapter->callbacks.moal_spin_lock(pmpriv->adapter->pmoal_handle,
pmpriv->rx_pkt_lock);
if (!rx_reor_tbl_ptr->rx_reorder_ptr[i]) {
pmpriv->adapter->callbacks.moal_spin_unlock(pmpriv->adapter->
pmoal_handle,
pmpriv->rx_pkt_lock);
break;
}
rx_tmp_ptr = rx_reor_tbl_ptr->rx_reorder_ptr[i];
rx_reor_tbl_ptr->rx_reorder_ptr[i] = MNULL;
pmpriv->adapter->callbacks.moal_spin_unlock(pmpriv->adapter->
pmoal_handle,
pmpriv->rx_pkt_lock);
wlan_11n_dispatch_pkt(priv, rx_tmp_ptr);
}
pmpriv->adapter->callbacks.moal_spin_lock(pmpriv->adapter->pmoal_handle,
pmpriv->rx_pkt_lock);
/*
* We don't have a circular buffer, hence use rotation to simulate
* circular buffer
*/
if (i > 0) {
xchg = rx_reor_tbl_ptr->win_size - i;
for (j = 0; j < xchg; ++j) {
rx_reor_tbl_ptr->rx_reorder_ptr[j] =
rx_reor_tbl_ptr->rx_reorder_ptr[i + j];
rx_reor_tbl_ptr->rx_reorder_ptr[i + j] = MNULL;
}
}
rx_reor_tbl_ptr->start_win = (rx_reor_tbl_ptr->start_win + i)
& (MAX_TID_VALUE - 1);
pmpriv->adapter->callbacks.moal_spin_unlock(pmpriv->adapter->pmoal_handle,
pmpriv->rx_pkt_lock);
LEAVE();
return ret;
}
/**
* @brief This function dispatchs all the packets in the buffer.
* There could be holes in the buffer.
*
* @param priv A pointer to mlan_private
* @param rx_reor_tbl_ptr A pointer to structure RxReorderTbl
* @param start_win Start window
*
* @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
*/
static mlan_status
wlan_11n_dispatch_pkt_until_start_win(t_void * priv,
RxReorderTbl * rx_reor_tbl_ptr,
int start_win)
{
int no_pkt_to_send, i, xchg;
mlan_status ret = MLAN_STATUS_SUCCESS;
ENTER();
no_pkt_to_send = (start_win > rx_reor_tbl_ptr->start_win) ?
MIN((start_win - rx_reor_tbl_ptr->start_win),
rx_reor_tbl_ptr->win_size) : rx_reor_tbl_ptr->win_size;
for (i = 0; i < no_pkt_to_send; ++i) {
if (rx_reor_tbl_ptr->rx_reorder_ptr[i]) {
wlan_11n_dispatch_pkt(priv, rx_reor_tbl_ptr->rx_reorder_ptr[i]);
rx_reor_tbl_ptr->rx_reorder_ptr[i] = MNULL;
}
}
/*
* We don't have a circular buffer, hence use rotation to simulate
* circular buffer
*/
xchg = rx_reor_tbl_ptr->win_size - no_pkt_to_send;
for (i = 0; i < xchg; ++i) {
rx_reor_tbl_ptr->rx_reorder_ptr[i] =
rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i];
rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i] = MNULL;
}
rx_reor_tbl_ptr->start_win = start_win;
LEAVE();
return ret;
}
/**
* @brief This function will identify if RxReodering is needed for the packet
* and will do the reordering if required before sending it to kernel
*
* @param priv A pointer to mlan_private
* @param seq_num Seqence number of the current packet
* @param tid Tid of the current packet
* @param ta Transmiter address of the current packet
* @param pkt_type Packetype for the current packet (to identify if its a BAR)
* @param payload Pointer to the payload
*
* @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
*/
mlan_status
mlan_11n_rxreorder_pkt(void *priv, t_u16 seq_num, t_u16 tid,
t_u8 * ta, t_u8 pkt_type, void *payload)
{
RxReorderTbl *rx_reor_tbl_ptr;
int start_win, end_win, win_size;
mlan_status ret = MLAN_STATUS_SUCCESS;
pmlan_adapter pmadapter = ((mlan_private *) priv)->adapter;
ENTER();
if (!
(rx_reor_tbl_ptr =
wlan_11n_get_rxreorder_tbl((mlan_private *) priv, tid, ta))) {
LEAVE();
if (pkt_type == PKT_TYPE_BAR)
return ret;
else {
wlan_11n_dispatch_pkt(priv, payload);
return ret;
}
} else {
if (pkt_type == PKT_TYPE_BAR)
PRINTM(MDAT_D, "BAR ");
start_win = rx_reor_tbl_ptr->start_win;
win_size = rx_reor_tbl_ptr->win_size;
end_win = ((start_win + win_size) - 1) & ~(MAX_TID_VALUE);
if (rx_reor_tbl_ptr->timer_context.timer_is_set)
pmadapter->callbacks.moal_stop_timer(rx_reor_tbl_ptr->timer_context.
timer);
pmadapter->callbacks.moal_start_timer(rx_reor_tbl_ptr->timer_context.
timer, MFALSE,
MIN_FLUSH_TIMER_MS * win_size);
rx_reor_tbl_ptr->timer_context.timer_is_set = MTRUE;
PRINTM(MDAT_D, "TID %d, TA %02x:%02x:%02x:%02x:%02x:%02x\n",
tid, ta[0], ta[1], ta[2], ta[3], ta[4], ta[5]);
PRINTM(MDAT_D, "1:seq_num %d start_win %d win_size %d end_win %d\n",
seq_num, start_win, win_size, end_win);
/*
* If seq_num is less then starting win then ignore and drop the
* packet
*/
if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) { /* Wrap */
if (seq_num >= ((start_win + (TWOPOW11)) &
~(MAX_TID_VALUE)) && (seq_num < start_win)) {
LEAVE();
return MLAN_STATUS_FAILURE;
}
} else if ((seq_num < start_win) ||
(seq_num > (start_win + (TWOPOW11)))) {
LEAVE();
return MLAN_STATUS_FAILURE;
}
/*
* If this packet is a BAR we adjust seq_num as
* WinStart = seq_num
*/
if (pkt_type == PKT_TYPE_BAR)
seq_num = ((seq_num + win_size) - 1) & ~(MAX_TID_VALUE);
PRINTM(MDAT_D, "2:seq_num %d start_win %d win_size %d end_win %d\n",
seq_num, start_win, win_size, end_win);
if (((end_win < start_win) && (seq_num < (TWOPOW11 -
(MAX_TID_VALUE - start_win)))
&& (seq_num > end_win))
|| ((end_win > start_win) &&
((seq_num > end_win) || (seq_num < start_win)))) {
end_win = seq_num;
if (((seq_num - win_size) + 1) >= 0)
start_win = (end_win - win_size) + 1;
else
start_win = (MAX_TID_VALUE - (win_size - seq_num)) + 1;
if ((ret = wlan_11n_dispatch_pkt_until_start_win(priv,
rx_reor_tbl_ptr,
start_win))) {
LEAVE();
return ret;
}
}
PRINTM(MDAT_D, "3:seq_num %d start_win %d win_size %d"
" end_win %d\n", seq_num, start_win, win_size, end_win);
if (pkt_type != PKT_TYPE_BAR) {
if (seq_num >= start_win)
rx_reor_tbl_ptr->rx_reorder_ptr[seq_num - start_win] = payload;
else /* Wrap condition */
rx_reor_tbl_ptr->rx_reorder_ptr[(seq_num
+ (MAX_TID_VALUE)) -
start_win] = payload;
}
wlan_11n_display_tbl_ptr(pmadapter, rx_reor_tbl_ptr);
/*
* Dispatch all packets sequentially from start_win until a
* hole is found and adjust the start_win appropriately
*/
ret = wlan_11n_scan_and_dispatch(priv, rx_reor_tbl_ptr);
wlan_11n_display_tbl_ptr(pmadapter, rx_reor_tbl_ptr);
}
LEAVE();
return ret;
}