mirror of https://gitee.com/openkylin/linux.git
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
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/*
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Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 HT specific routines.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
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struct txentry_desc *txdesc,
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const struct rt2x00_rate *hwrate)
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{
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
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struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
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if (tx_info->control.sta)
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txdesc->mpdu_density =
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tx_info->control.sta->ht_cap.ampdu_density;
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else
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txdesc->mpdu_density = 0;
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txdesc->ba_size = 7; /* FIXME: What value is needed? */
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txdesc->stbc = 0; /* FIXME: What value is needed? */
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txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs);
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if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
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txdesc->mcs |= 0x08;
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/*
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* Convert flags
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*/
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if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
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__set_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags);
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/*
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* Determine HT Mix/Greenfield rate mode
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*/
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if (txrate->flags & IEEE80211_TX_RC_MCS)
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txdesc->rate_mode = RATE_MODE_HT_MIX;
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if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
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txdesc->rate_mode = RATE_MODE_HT_GREENFIELD;
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if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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__set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags);
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if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
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__set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags);
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}
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