Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7d54d0ddd66678ada6635159dac1eb82ccbe34b5
Commit: 7d54d0ddd66678ada6635159dac1eb82ccbe34b5
Parent: 4e20cb293cc0b30f32a53011fd6b38493d9fdcaa
Author: Johannes Berg <[EMAIL PROTECTED]>
AuthorDate: Wed Dec 19 01:31:25 2007 +0100
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 14:59:47 2008 -0800
mac80211: allow easier multicast/broadcast buffering in hardware
There are various decisions influencing the decision whether to buffer
a frame for after the next DTIM beacon. The "do we have stations in PS
mode" condition cannot be tested by the driver so mac80211 has to do
that. To ease driver writing for hardware that can buffer frames until
after the next DTIM beacon, introduce a new txctl flag telling the
driver to buffer a specific frame.
While at it, restructure and comment the code for multicast buffering
and remove spurious "inline" directives.
Signed-off-by: Johannes Berg <[EMAIL PROTECTED]>
Cc: Michael Buesch <[EMAIL PROTECTED]>
Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
include/net/mac80211.h | 2 ++
net/mac80211/tx.c | 32 +++++++++++++++++++++++---------
2 files changed, 25 insertions(+), 9 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 2606ca2..5b9e7a2 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -308,6 +308,8 @@ struct ieee80211_tx_control {
* set_retry_limit configured
* long retry value */
#define IEEE80211_TXCTL_EAPOL_FRAME (1<<11) /* internal to mac80211 */
+#define IEEE80211_TXCTL_SEND_AFTER_DTIM (1<<12) /* send this frame
after DTIM
+ * beacon */
u32 flags; /* tx control flags defined
* above */
u8 key_idx; /* keyidx from hw->set_key(), undefined if
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index e177a8d..f7aff2e 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -322,16 +322,27 @@ static void purge_old_ps_buffers(struct ieee80211_local
*local)
wiphy_name(local->hw.wiphy), purged);
}
-static inline ieee80211_txrx_result
+static ieee80211_txrx_result
ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx)
{
- /* broadcast/multicast frame */
- /* If any of the associated stations is in power save mode,
- * the frame is buffered to be sent after DTIM beacon frame */
- if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) &&
- tx->sdata->type != IEEE80211_IF_TYPE_WDS &&
- tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) &&
- !(tx->fc & IEEE80211_FCTL_ORDER)) {
+ /*
+ * broadcast/multicast frame
+ *
+ * If any of the associated stations is in power save mode,
+ * the frame is buffered to be sent after DTIM beacon frame.
+ * This is done either by the hardware or us.
+ */
+
+ /* not AP/IBSS or ordered frame */
+ if (!tx->sdata->bss || (tx->fc & IEEE80211_FCTL_ORDER))
+ return TXRX_CONTINUE;
+
+ /* no stations in PS mode */
+ if (!atomic_read(&tx->sdata->bss->num_sta_ps))
+ return TXRX_CONTINUE;
+
+ /* buffered in mac80211 */
+ if (tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) {
if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
purge_old_ps_buffers(tx->local);
if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >=
@@ -348,10 +359,13 @@ ieee80211_tx_h_multicast_ps_buf(struct
ieee80211_txrx_data *tx)
return TXRX_QUEUED;
}
+ /* buffered in hardware */
+ tx->u.tx.control->flags |= IEEE80211_TXCTL_SEND_AFTER_DTIM;
+
return TXRX_CONTINUE;
}
-static inline ieee80211_txrx_result
+static ieee80211_txrx_result
ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx)
{
struct sta_info *sta = tx->sta;
-
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