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mwifiex: enhance RX reordering to avoid packet drop during host sleep

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Once hostsleep is activated, this patch takes care of not
dropping packets in RX reorder table.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Avinash Patil 2012-09-27 19:00:10 -07:00 committed by John W. Linville
parent ff9bd2d8d9
commit 2db96c3d0a
4 changed files with 49 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/net/wireless/mwifiex/11n_rxreorder.c
View File

@ -302,6 +302,7 @@ mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
new_node->start_win = last_seq + 1;
new_node->win_size = win_size;
new_node->flags = 0;
new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size,
GFP_KERNEL);
@ -457,13 +458,20 @@ int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
* 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 - 1)) && (seq_num < start_win))
if (tbl->flags & RXREOR_FORCE_NO_DROP) {
dev_dbg(priv->adapter->dev,
"RXREOR_FORCE_NO_DROP when HS is activated\n");
tbl->flags &= ~RXREOR_FORCE_NO_DROP;
} else {
if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
if (seq_num >= ((start_win + TWOPOW11) &
(MAX_TID_VALUE - 1)) &&
seq_num < start_win)
return -1;
} else if ((seq_num < start_win) ||
(seq_num > (start_win + TWOPOW11))) {
return -1;
} else if ((seq_num < start_win) ||
(seq_num > (start_win + TWOPOW11))) {
return -1;
}
}
/*
@ -474,8 +482,7 @@ int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1);
if (((end_win < start_win) &&
(seq_num < (TWOPOW11 - (MAX_TID_VALUE - start_win))) &&
(seq_num > end_win)) ||
(seq_num < start_win) && (seq_num > end_win)) ||
((end_win > start_win) && ((seq_num > end_win) ||
(seq_num < start_win)))) {
end_win = seq_num;
@ -637,3 +644,29 @@ void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv)
INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
mwifiex_reset_11n_rx_seq_num(priv);
}
/*
* This function updates all rx_reorder_tbl's flags.
*/
void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags)
{
struct mwifiex_private *priv;
struct mwifiex_rx_reorder_tbl *tbl;
unsigned long lock_flags;
int i;
for (i = 0; i < adapter->priv_num; i++) {
priv = adapter->priv[i];
if (!priv)
continue;
if (list_empty(&priv->rx_reorder_tbl_ptr))
continue;
spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags);
list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
tbl->flags = flags;
spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags);
}
return;
}

5
drivers/net/wireless/mwifiex/11n_rxreorder.h
View File

@ -41,6 +41,10 @@
#define BA_SETUP_MAX_PACKET_THRESHOLD 16
#define BA_SETUP_PACKET_OFFSET 16
enum mwifiex_rxreor_flags {
RXREOR_FORCE_NO_DROP = 1<<0,
};
static inline void mwifiex_reset_11n_rx_seq_num(struct mwifiex_private *priv)
{
memset(priv->rx_seq, 0xff, sizeof(priv->rx_seq));
@ -73,5 +77,6 @@ struct mwifiex_rx_reorder_tbl *mwifiex_11n_get_rxreorder_tbl(struct
struct mwifiex_rx_reorder_tbl *
mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta);
void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta);
void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags);
#endif /* _MWIFIEX_11N_RXREORDER_H_ */

2
drivers/net/wireless/mwifiex/cmdevt.c
View File

@ -1088,6 +1088,8 @@ mwifiex_hs_activated_event(struct mwifiex_private *priv, u8 activated)
if (activated) {
if (priv->adapter->is_hs_configured) {
priv->adapter->hs_activated = true;
mwifiex_update_rxreor_flags(priv->adapter,
RXREOR_FORCE_NO_DROP);
dev_dbg(priv->adapter->dev, "event: hs_activated\n");
priv->adapter->hs_activate_wait_q_woken = true;
wake_up_interruptible(

1
drivers/net/wireless/mwifiex/main.h
View File

@ -535,6 +535,7 @@ struct mwifiex_rx_reorder_tbl {
int win_size;
void **rx_reorder_ptr;
struct reorder_tmr_cnxt timer_context;
u8 flags;
};
struct mwifiex_bss_prio_node {