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| author | Arik Nemtsov <arik@wizery.com> | 2010-11-08 11:51:06 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-11-16 16:37:04 -0500 |
| commit | f23a478075659db8a4fd62fa6e264a8bb052cc5b (patch) | |
| tree | ba1492a4a781770644359b88e8ca2d8d3a00adc2 /net/mac80211/tx.c | |
| parent | ca4a0831917d6541b45f03542257fcb20dc9cf4a (diff) | |
| download | linux-3.10-f23a478075659db8a4fd62fa6e264a8bb052cc5b.tar.gz linux-3.10-f23a478075659db8a4fd62fa6e264a8bb052cc5b.tar.bz2 linux-3.10-f23a478075659db8a4fd62fa6e264a8bb052cc5b.zip | |
mac80211: support hardware TX fragmentation offload
The lower driver is notified when the fragmentation threshold changes
and upon a reconfig of the interface.
If the driver supports hardware TX fragmentation, don't fragment
packets in the stack.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 96c59430950..b392876af7d 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1033,6 +1033,7 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, struct ieee80211_radiotap_header *rthdr = (struct ieee80211_radiotap_header *) skb->data; struct ieee80211_supported_band *sband; + bool hw_frag; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, NULL); @@ -1042,6 +1043,9 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; tx->flags &= ~IEEE80211_TX_FRAGMENTED; + /* packet is fragmented in HW if we have a non-NULL driver callback */ + hw_frag = (tx->local->ops->set_frag_threshold != NULL); + /* * for every radiotap entry that is present * (ieee80211_radiotap_iterator_next returns -ENOENT when no more @@ -1078,7 +1082,8 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, } if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; - if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) + if ((*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) && + !hw_frag) tx->flags |= IEEE80211_TX_FRAGMENTED; break; @@ -1181,8 +1186,10 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, /* * Set this flag (used below to indicate "automatic fragmentation"), * it will be cleared/left by radiotap as desired. + * Only valid when fragmentation is done by the stack. */ - tx->flags |= IEEE80211_TX_FRAGMENTED; + if (!local->ops->set_frag_threshold) + tx->flags |= IEEE80211_TX_FRAGMENTED; /* process and remove the injection radiotap header */ if (unlikely(info->flags & IEEE80211_TX_INTFL_HAS_RADIOTAP)) { |