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mwl8k: Add timestamp information for tx packets

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Timestamp tx packets using a HW micro-second timer.
This timestamp will be compared to the current timestamp
in the hardware and if the difference is greater than 500ms,
the packet will be dropped.

Signed-off-by: Pradeep Nemavat <pnemavat@marvell.com>
Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Pradeep Nemavat 2011-04-21 16:34:57 +05:30 committed by John W. Linville
parent 3a7dbc3b2a
commit 566875db50
1 changed files with 13 additions and 0 deletions
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13
drivers/net/wireless/mwl8k.c
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@ -74,6 +74,14 @@ MODULE_PARM_DESC(ap_mode_default,
#define MWL8K_A2H_INT_RX_READY (1 << 1)
#define MWL8K_A2H_INT_TX_DONE (1 << 0)
/* HW micro second timer register
* located at offset 0xA600. This
* will be used to timestamp tx
* packets.
*/
#define MWL8K_HW_TIMER_REGISTER 0x0000a600
#define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \
MWL8K_A2H_INT_CHNL_SWITCHED | \
MWL8K_A2H_INT_QUEUE_EMPTY | \
@ -1972,6 +1980,11 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
tx->peer_id = MWL8K_STA(tx_info->control.sta)->peer_id;
else
tx->peer_id = 0;
if (priv->ap_fw)
tx->timestamp = cpu_to_le32(ioread32(priv->regs +
MWL8K_HW_TIMER_REGISTER));
wmb();
tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);