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authorPradeep Nemavat <pnemavat@marvell.com>2011-04-21 16:34:57 +0530
committerJohn W. Linville <linville@tuxdriver.com>2011-04-25 14:50:16 -0400
commit566875db5058f582ea56da891f9c3cabc01efff5 (patch)
tree2475029977001bed0d4e21abb9483dc76336ed1a /drivers/net/wireless/mwl8k.c
parent3a7dbc3b2ac545efac75d4145839eaa7b59d9741 (diff)
downloadlinux-stericsson-566875db5058f582ea56da891f9c3cabc01efff5.tar.gz
mwl8k: Add timestamp information for tx packets
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>
Diffstat (limited to 'drivers/net/wireless/mwl8k.c')
-rw-r--r--drivers/net/wireless/mwl8k.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index 33da25a349b7..93fe1bd91c36 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -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);