rt2x00: Optimize TX descriptor handling
HT and no-HT rt2x00 devices use a partly different TX descriptor.
Optimize the tx desciptor memory layout by putting the PLCP and HT
substructs into a union and introduce a new driver flag to decide which
TX desciptor format is used by the device.
This saves us the expensive PLCP calculation fOr HT devices and the HT
descriptor setup on no-HT devices.
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00ht.c b/drivers/net/wireless/rt2x00/rt2x00ht.c
index 03d9579..78a0e73 100644
--- a/drivers/net/wireless/rt2x00/rt2x00ht.c
+++ b/drivers/net/wireless/rt2x00/rt2x00ht.c
@@ -38,12 +38,12 @@
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
if (tx_info->control.sta)
- txdesc->mpdu_density =
+ txdesc->u.ht.mpdu_density =
tx_info->control.sta->ht_cap.ampdu_density;
- txdesc->ba_size = 7; /* FIXME: What value is needed? */
+ txdesc->u.ht.ba_size = 7; /* FIXME: What value is needed? */
- txdesc->stbc =
+ txdesc->u.ht.stbc =
(tx_info->flags & IEEE80211_TX_CTL_STBC) >> IEEE80211_TX_CTL_STBC_SHIFT;
/*
@@ -51,22 +51,22 @@
* mcs rate to be used
*/
if (txrate->flags & IEEE80211_TX_RC_MCS) {
- txdesc->mcs = txrate->idx;
+ txdesc->u.ht.mcs = txrate->idx;
/*
* MIMO PS should be set to 1 for STA's using dynamic SM PS
* when using more then one tx stream (>MCS7).
*/
- if (tx_info->control.sta && txdesc->mcs > 7 &&
+ if (tx_info->control.sta && txdesc->u.ht.mcs > 7 &&
((tx_info->control.sta->ht_cap.cap &
IEEE80211_HT_CAP_SM_PS) >>
IEEE80211_HT_CAP_SM_PS_SHIFT) ==
WLAN_HT_CAP_SM_PS_DYNAMIC)
__set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags);
} else {
- txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs);
+ txdesc->u.ht.mcs = rt2x00_get_rate_mcs(hwrate->mcs);
if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
- txdesc->mcs |= 0x08;
+ txdesc->u.ht.mcs |= 0x08;
}
/*
@@ -105,11 +105,11 @@
* for frames not transmitted with TXOP_HTTXOP
*/
if (ieee80211_is_mgmt(hdr->frame_control))
- txdesc->txop = TXOP_BACKOFF;
+ txdesc->u.ht.txop = TXOP_BACKOFF;
else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
- txdesc->txop = TXOP_SIFS;
+ txdesc->u.ht.txop = TXOP_SIFS;
else
- txdesc->txop = TXOP_HTTXOP;
+ txdesc->u.ht.txop = TXOP_HTTXOP;
}
u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,