rt2x00: move under ralink vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 0 insertions, 1290 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
deleted file mode 100644
index 68b620b2462f..000000000000
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ /dev/null
@@ -1,1290 +0,0 @@
-/*
-	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
-	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
-	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
-	<http://rt2x00.serialmonkey.com>
-
-	This program is free software; you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation; either version 2 of the License, or
-	(at your option) any later version.
-
-	This program is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
-	Module: rt2x00lib
-	Abstract: rt2x00 queue specific routines.
- */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/dma-mapping.h>
-
-#include "rt2x00.h"
-#include "rt2x00lib.h"
-
-struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry, gfp_t gfp)
-{
-	struct data_queue *queue = entry->queue;
-	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
-	struct sk_buff *skb;
-	struct skb_frame_desc *skbdesc;
-	unsigned int frame_size;
-	unsigned int head_size = 0;
-	unsigned int tail_size = 0;
-
-	/*
-	 * The frame size includes descriptor size, because the
-	 * hardware directly receive the frame into the skbuffer.
-	 */
-	frame_size = queue->data_size + queue->desc_size + queue->winfo_size;
-
-	/*
-	 * The payload should be aligned to a 4-byte boundary,
-	 * this means we need at least 3 bytes for moving the frame
-	 * into the correct offset.
-	 */
-	head_size = 4;
-
-	/*
-	 * For IV/EIV/ICV assembly we must make sure there is
-	 * at least 8 bytes bytes available in headroom for IV/EIV
-	 * and 8 bytes for ICV data as tailroon.
-	 */
-	if (rt2x00_has_cap_hw_crypto(rt2x00dev)) {
-		head_size += 8;
-		tail_size += 8;
-	}
-
-	/*
-	 * Allocate skbuffer.
-	 */
-	skb = __dev_alloc_skb(frame_size + head_size + tail_size, gfp);
-	if (!skb)
-		return NULL;
-
-	/*
-	 * Make sure we not have a frame with the requested bytes
-	 * available in the head and tail.
-	 */
-	skb_reserve(skb, head_size);
-	skb_put(skb, frame_size);
-
-	/*
-	 * Populate skbdesc.
-	 */
-	skbdesc = get_skb_frame_desc(skb);
-	memset(skbdesc, 0, sizeof(*skbdesc));
-	skbdesc->entry = entry;
-
-	if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DMA)) {
-		dma_addr_t skb_dma;
-
-		skb_dma = dma_map_single(rt2x00dev->dev, skb->data, skb->len,
-					 DMA_FROM_DEVICE);
-		if (unlikely(dma_mapping_error(rt2x00dev->dev, skb_dma))) {
-			dev_kfree_skb_any(skb);
-			return NULL;
-		}
-
-		skbdesc->skb_dma = skb_dma;
-		skbdesc->flags |= SKBDESC_DMA_MAPPED_RX;
-	}
-
-	return skb;
-}
-
-int rt2x00queue_map_txskb(struct queue_entry *entry)
-{
-	struct device *dev = entry->queue->rt2x00dev->dev;
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
-
-	skbdesc->skb_dma =
-	    dma_map_single(dev, entry->skb->data, entry->skb->len, DMA_TO_DEVICE);
-
-	if (unlikely(dma_mapping_error(dev, skbdesc->skb_dma)))
-		return -ENOMEM;
-
-	skbdesc->flags |= SKBDESC_DMA_MAPPED_TX;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb);
-
-void rt2x00queue_unmap_skb(struct queue_entry *entry)
-{
-	struct device *dev = entry->queue->rt2x00dev->dev;
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
-
-	if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) {
-		dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len,
-				 DMA_FROM_DEVICE);
-		skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX;
-	} else if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) {
-		dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len,
-				 DMA_TO_DEVICE);
-		skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX;
-	}
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb);
-
-void rt2x00queue_free_skb(struct queue_entry *entry)
-{
-	if (!entry->skb)
-		return;
-
-	rt2x00queue_unmap_skb(entry);
-	dev_kfree_skb_any(entry->skb);
-	entry->skb = NULL;
-}
-
-void rt2x00queue_align_frame(struct sk_buff *skb)
-{
-	unsigned int frame_length = skb->len;
-	unsigned int align = ALIGN_SIZE(skb, 0);
-
-	if (!align)
-		return;
-
-	skb_push(skb, align);
-	memmove(skb->data, skb->data + align, frame_length);
-	skb_trim(skb, frame_length);
-}
-
-/*
- * H/W needs L2 padding between the header and the paylod if header size
- * is not 4 bytes aligned.
- */
-void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int hdr_len)
-{
-	unsigned int l2pad = (skb->len > hdr_len) ? L2PAD_SIZE(hdr_len) : 0;
-
-	if (!l2pad)
-		return;
-
-	skb_push(skb, l2pad);
-	memmove(skb->data, skb->data + l2pad, hdr_len);
-}
-
-void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int hdr_len)
-{
-	unsigned int l2pad = (skb->len > hdr_len) ? L2PAD_SIZE(hdr_len) : 0;
-
-	if (!l2pad)
-		return;
-
-	memmove(skb->data + l2pad, skb->data, hdr_len);
-	skb_pull(skb, l2pad);
-}
-
-static void rt2x00queue_create_tx_descriptor_seq(struct rt2x00_dev *rt2x00dev,
-						 struct sk_buff *skb,
-						 struct txentry_desc *txdesc)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif);
-	u16 seqno;
-
-	if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ))
-		return;
-
-	__set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags);
-
-	if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_SW_SEQNO)) {
-		/*
-		 * rt2800 has a H/W (or F/W) bug, device incorrectly increase
-		 * seqno on retransmited data (non-QOS) frames. To workaround
-		 * the problem let's generate seqno in software if QOS is
-		 * disabled.
-		 */
-		if (test_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags))
-			__clear_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags);
-		else
-			/* H/W will generate sequence number */
-			return;
-	}
-
-	/*
-	 * The hardware is not able to insert a sequence number. Assign a
-	 * software generated one here.
-	 *
-	 * This is wrong because beacons are not getting sequence
-	 * numbers assigned properly.
-	 *
-	 * A secondary problem exists for drivers that cannot toggle
-	 * sequence counting per-frame, since those will override the
-	 * sequence counter given by mac80211.
-	 */
-	if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags))
-		seqno = atomic_add_return(0x10, &intf->seqno);
-	else
-		seqno = atomic_read(&intf->seqno);
-
-	hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
-	hdr->seq_ctrl |= cpu_to_le16(seqno);
-}
-
-static void rt2x00queue_create_tx_descriptor_plcp(struct rt2x00_dev *rt2x00dev,
-						  struct sk_buff *skb,
-						  struct txentry_desc *txdesc,
-						  const struct rt2x00_rate *hwrate)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
-	unsigned int data_length;
-	unsigned int duration;
-	unsigned int residual;
-
-	/*
-	 * Determine with what IFS priority this frame should be send.
-	 * Set ifs to IFS_SIFS when the this is not the first fragment,
-	 * or this fragment came after RTS/CTS.
-	 */
-	if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags))
-		txdesc->u.plcp.ifs = IFS_BACKOFF;
-	else
-		txdesc->u.plcp.ifs = IFS_SIFS;
-
-	/* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
-	data_length = skb->len + 4;
-	data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb);
-
-	/*
-	 * PLCP setup
-	 * Length calculation depends on OFDM/CCK rate.
-	 */
-	txdesc->u.plcp.signal = hwrate->plcp;
-	txdesc->u.plcp.service = 0x04;
-
-	if (hwrate->flags & DEV_RATE_OFDM) {
-		txdesc->u.plcp.length_high = (data_length >> 6) & 0x3f;
-		txdesc->u.plcp.length_low = data_length & 0x3f;
-	} else {
-		/*
-		 * Convert length to microseconds.
-		 */
-		residual = GET_DURATION_RES(data_length, hwrate->bitrate);
-		duration = GET_DURATION(data_length, hwrate->bitrate);
-
-		if (residual != 0) {
-			duration++;
-
-			/*
-			 * Check if we need to set the Length Extension
-			 */
-			if (hwrate->bitrate == 110 && residual <= 30)
-				txdesc->u.plcp.service |= 0x80;
-		}
-
-		txdesc->u.plcp.length_high = (duration >> 8) & 0xff;
-		txdesc->u.plcp.length_low = duration & 0xff;
-
-		/*
-		 * When preamble is enabled we should set the
-		 * preamble bit for the signal.
-		 */
-		if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
-			txdesc->u.plcp.signal |= 0x08;
-	}
-}
-
-static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev,
-						struct sk_buff *skb,
-						struct txentry_desc *txdesc,
-						struct ieee80211_sta *sta,
-						const struct rt2x00_rate *hwrate)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct rt2x00_sta *sta_priv = NULL;
-
-	if (sta) {
-		txdesc->u.ht.mpdu_density =
-		    sta->ht_cap.ampdu_density;
-
-		sta_priv = sta_to_rt2x00_sta(sta);
-		txdesc->u.ht.wcid = sta_priv->wcid;
-	}
-
-	/*
-	 * If IEEE80211_TX_RC_MCS is set txrate->idx just contains the
-	 * mcs rate to be used
-	 */
-	if (txrate->flags & IEEE80211_TX_RC_MCS) {
-		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 (sta && txdesc->u.ht.mcs > 7 &&
-		    sta->smps_mode == IEEE80211_SMPS_DYNAMIC)
-			__set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags);
-	} else {
-		txdesc->u.ht.mcs = rt2x00_get_rate_mcs(hwrate->mcs);
-		if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
-			txdesc->u.ht.mcs |= 0x08;
-	}
-
-	if (test_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags)) {
-		if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
-			txdesc->u.ht.txop = TXOP_SIFS;
-		else
-			txdesc->u.ht.txop = TXOP_BACKOFF;
-
-		/* Left zero on all other settings. */
-		return;
-	}
-
-	txdesc->u.ht.ba_size = 7;	/* FIXME: What value is needed? */
-
-	/*
-	 * Only one STBC stream is supported for now.
-	 */
-	if (tx_info->flags & IEEE80211_TX_CTL_STBC)
-		txdesc->u.ht.stbc = 1;
-
-	/*
-	 * This frame is eligible for an AMPDU, however, don't aggregate
-	 * frames that are intended to probe a specific tx rate.
-	 */
-	if (tx_info->flags & IEEE80211_TX_CTL_AMPDU &&
-	    !(tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
-		__set_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags);
-
-	/*
-	 * Set 40Mhz mode if necessary (for legacy rates this will
-	 * duplicate the frame to both channels).
-	 */
-	if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH ||
-	    txrate->flags & IEEE80211_TX_RC_DUP_DATA)
-		__set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags);
-	if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
-		__set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags);
-
-	/*
-	 * Determine IFS values
-	 * - Use TXOP_BACKOFF for management frames except beacons
-	 * - Use TXOP_SIFS for fragment bursts
-	 * - Use TXOP_HTTXOP for everything else
-	 *
-	 * Note: rt2800 devices won't use CTS protection (if used)
-	 * for frames not transmitted with TXOP_HTTXOP
-	 */
-	if (ieee80211_is_mgmt(hdr->frame_control) &&
-	    !ieee80211_is_beacon(hdr->frame_control))
-		txdesc->u.ht.txop = TXOP_BACKOFF;
-	else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
-		txdesc->u.ht.txop = TXOP_SIFS;
-	else
-		txdesc->u.ht.txop = TXOP_HTTXOP;
-}
-
-static void rt2x00queue_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
-					     struct sk_buff *skb,
-					     struct txentry_desc *txdesc,
-					     struct ieee80211_sta *sta)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
-	struct ieee80211_rate *rate;
-	const struct rt2x00_rate *hwrate = NULL;
-
-	memset(txdesc, 0, sizeof(*txdesc));
-
-	/*
-	 * Header and frame information.
-	 */
-	txdesc->length = skb->len;
-	txdesc->header_length = ieee80211_get_hdrlen_from_skb(skb);
-
-	/*
-	 * Check whether this frame is to be acked.
-	 */
-	if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK))
-		__set_bit(ENTRY_TXD_ACK, &txdesc->flags);
-
-	/*
-	 * Check if this is a RTS/CTS frame
-	 */
-	if (ieee80211_is_rts(hdr->frame_control) ||
-	    ieee80211_is_cts(hdr->frame_control)) {
-		__set_bit(ENTRY_TXD_BURST, &txdesc->flags);
-		if (ieee80211_is_rts(hdr->frame_control))
-			__set_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags);
-		else
-			__set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags);
-		if (tx_info->control.rts_cts_rate_idx >= 0)
-			rate =
-			    ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info);
-	}
-
-	/*
-	 * Determine retry information.
-	 */
-	txdesc->retry_limit = tx_info->control.rates[0].count - 1;
-	if (txdesc->retry_limit >= rt2x00dev->long_retry)
-		__set_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags);
-
-	/*
-	 * Check if more fragments are pending
-	 */
-	if (ieee80211_has_morefrags(hdr->frame_control)) {
-		__set_bit(ENTRY_TXD_BURST, &txdesc->flags);
-		__set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags);
-	}
-
-	/*
-	 * Check if more frames (!= fragments) are pending
-	 */
-	if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES)
-		__set_bit(ENTRY_TXD_BURST, &txdesc->flags);
-
-	/*
-	 * Beacons and probe responses require the tsf timestamp
-	 * to be inserted into the frame.
-	 */
-	if (ieee80211_is_beacon(hdr->frame_control) ||
-	    ieee80211_is_probe_resp(hdr->frame_control))
-		__set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags);
-
-	if ((tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) &&
-	    !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags))
-		__set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags);
-
-	/*
-	 * Determine rate modulation.
-	 */
-	if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
-		txdesc->rate_mode = RATE_MODE_HT_GREENFIELD;
-	else if (txrate->flags & IEEE80211_TX_RC_MCS)
-		txdesc->rate_mode = RATE_MODE_HT_MIX;
-	else {
-		rate = ieee80211_get_tx_rate(rt2x00dev->hw, tx_info);
-		hwrate = rt2x00_get_rate(rate->hw_value);
-		if (hwrate->flags & DEV_RATE_OFDM)
-			txdesc->rate_mode = RATE_MODE_OFDM;
-		else
-			txdesc->rate_mode = RATE_MODE_CCK;
-	}
-
-	/*
-	 * Apply TX descriptor handling by components
-	 */
-	rt2x00crypto_create_tx_descriptor(rt2x00dev, skb, txdesc);
-	rt2x00queue_create_tx_descriptor_seq(rt2x00dev, skb, txdesc);
-
-	if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_HT_TX_DESC))
-		rt2x00queue_create_tx_descriptor_ht(rt2x00dev, skb, txdesc,
-						   sta, hwrate);
-	else
-		rt2x00queue_create_tx_descriptor_plcp(rt2x00dev, skb, txdesc,
-						      hwrate);
-}
-
-static int rt2x00queue_write_tx_data(struct queue_entry *entry,
-				     struct txentry_desc *txdesc)
-{
-	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
-
-	/*
-	 * This should not happen, we already checked the entry
-	 * was ours. When the hardware disagrees there has been
-	 * a queue corruption!
-	 */
-	if (unlikely(rt2x00dev->ops->lib->get_entry_state &&
-		     rt2x00dev->ops->lib->get_entry_state(entry))) {
-		rt2x00_err(rt2x00dev,
-			   "Corrupt queue %d, accessing entry which is not ours\n"
-			   "Please file bug report to %s\n",
-			   entry->queue->qid, DRV_PROJECT);
-		return -EINVAL;
-	}
-
-	/*
-	 * Add the requested extra tx headroom in front of the skb.
-	 */
-	skb_push(entry->skb, rt2x00dev->extra_tx_headroom);
-	memset(entry->skb->data, 0, rt2x00dev->extra_tx_headroom);
-
-	/*
-	 * Call the driver's write_tx_data function, if it exists.
-	 */
-	if (rt2x00dev->ops->lib->write_tx_data)
-		rt2x00dev->ops->lib->write_tx_data(entry, txdesc);
-
-	/*
-	 * Map the skb to DMA.
-	 */
-	if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_DMA) &&
-	    rt2x00queue_map_txskb(entry))
-		return -ENOMEM;
-
-	return 0;
-}
-
-static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
-					    struct txentry_desc *txdesc)
-{
-	struct data_queue *queue = entry->queue;
-
-	queue->rt2x00dev->ops->lib->write_tx_desc(entry, txdesc);
-
-	/*
-	 * All processing on the frame has been completed, this means
-	 * it is now ready to be dumped to userspace through debugfs.
-	 */
-	rt2x00debug_dump_frame(queue->rt2x00dev, DUMP_FRAME_TX, entry->skb);
-}
-
-static void rt2x00queue_kick_tx_queue(struct data_queue *queue,
-				      struct txentry_desc *txdesc)
-{
-	/*
-	 * Check if we need to kick the queue, there are however a few rules
-	 *	1) Don't kick unless this is the last in frame in a burst.
-	 *	   When the burst flag is set, this frame is always followed
-	 *	   by another frame which in some way are related to eachother.
-	 *	   This is true for fragments, RTS or CTS-to-self frames.
-	 *	2) Rule 1 can be broken when the available entries
-	 *	   in the queue are less then a certain threshold.
-	 */
-	if (rt2x00queue_threshold(queue) ||
-	    !test_bit(ENTRY_TXD_BURST, &txdesc->flags))
-		queue->rt2x00dev->ops->lib->kick_queue(queue);
-}
-
-static void rt2x00queue_bar_check(struct queue_entry *entry)
-{
-	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
-	struct ieee80211_bar *bar = (void *) (entry->skb->data +
-				    rt2x00dev->extra_tx_headroom);
-	struct rt2x00_bar_list_entry *bar_entry;
-
-	if (likely(!ieee80211_is_back_req(bar->frame_control)))
-		return;
-
-	bar_entry = kmalloc(sizeof(*bar_entry), GFP_ATOMIC);
-
-	/*
-	 * If the alloc fails we still send the BAR out but just don't track
-	 * it in our bar list. And as a result we will report it to mac80211
-	 * back as failed.
-	 */
-	if (!bar_entry)
-		return;
-
-	bar_entry->entry = entry;
-	bar_entry->block_acked = 0;
-
-	/*
-	 * Copy the relevant parts of the 802.11 BAR into out check list
-	 * such that we can use RCU for less-overhead in the RX path since
-	 * sending BARs and processing the according BlockAck should be
-	 * the exception.
-	 */
-	memcpy(bar_entry->ra, bar->ra, sizeof(bar->ra));
-	memcpy(bar_entry->ta, bar->ta, sizeof(bar->ta));
-	bar_entry->control = bar->control;
-	bar_entry->start_seq_num = bar->start_seq_num;
-
-	/*
-	 * Insert BAR into our BAR check list.
-	 */
-	spin_lock_bh(&rt2x00dev->bar_list_lock);
-	list_add_tail_rcu(&bar_entry->list, &rt2x00dev->bar_list);
-	spin_unlock_bh(&rt2x00dev->bar_list_lock);
-}
-
-int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
-			       struct ieee80211_sta *sta, bool local)
-{
-	struct ieee80211_tx_info *tx_info;
-	struct queue_entry *entry;
-	struct txentry_desc txdesc;
-	struct skb_frame_desc *skbdesc;
-	u8 rate_idx, rate_flags;
-	int ret = 0;
-
-	/*
-	 * Copy all TX descriptor information into txdesc,
-	 * after that we are free to use the skb->cb array
-	 * for our information.
-	 */
-	rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc, sta);
-
-	/*
-	 * All information is retrieved from the skb->cb array,
-	 * now we should claim ownership of the driver part of that
-	 * array, preserving the bitrate index and flags.
-	 */
-	tx_info = IEEE80211_SKB_CB(skb);
-	rate_idx = tx_info->control.rates[0].idx;
-	rate_flags = tx_info->control.rates[0].flags;
-	skbdesc = get_skb_frame_desc(skb);
-	memset(skbdesc, 0, sizeof(*skbdesc));
-	skbdesc->tx_rate_idx = rate_idx;
-	skbdesc->tx_rate_flags = rate_flags;
-
-	if (local)
-		skbdesc->flags |= SKBDESC_NOT_MAC80211;
-
-	/*
-	 * When hardware encryption is supported, and this frame
-	 * is to be encrypted, we should strip the IV/EIV data from
-	 * the frame so we can provide it to the driver separately.
-	 */
-	if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
-	    !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) {
-		if (rt2x00_has_cap_flag(queue->rt2x00dev, REQUIRE_COPY_IV))
-			rt2x00crypto_tx_copy_iv(skb, &txdesc);
-		else
-			rt2x00crypto_tx_remove_iv(skb, &txdesc);
-	}
-
-	/*
-	 * When DMA allocation is required we should guarantee to the
-	 * driver that the DMA is aligned to a 4-byte boundary.
-	 * However some drivers require L2 padding to pad the payload
-	 * rather then the header. This could be a requirement for
-	 * PCI and USB devices, while header alignment only is valid
-	 * for PCI devices.
-	 */
-	if (rt2x00_has_cap_flag(queue->rt2x00dev, REQUIRE_L2PAD))
-		rt2x00queue_insert_l2pad(skb, txdesc.header_length);
-	else if (rt2x00_has_cap_flag(queue->rt2x00dev, REQUIRE_DMA))
-		rt2x00queue_align_frame(skb);
-
-	/*
-	 * That function must be called with bh disabled.
-	 */
-	spin_lock(&queue->tx_lock);
-
-	if (unlikely(rt2x00queue_full(queue))) {
-		rt2x00_err(queue->rt2x00dev, "Dropping frame due to full tx queue %d\n",
-			   queue->qid);
-		ret = -ENOBUFS;
-		goto out;
-	}
-
-	entry = rt2x00queue_get_entry(queue, Q_INDEX);
-
-	if (unlikely(test_and_set_bit(ENTRY_OWNER_DEVICE_DATA,
-				      &entry->flags))) {
-		rt2x00_err(queue->rt2x00dev,
-			   "Arrived at non-free entry in the non-full queue %d\n"
-			   "Please file bug report to %s\n",
-			   queue->qid, DRV_PROJECT);
-		ret = -EINVAL;
-		goto out;
-	}
-
-	skbdesc->entry = entry;
-	entry->skb = skb;
-
-	/*
-	 * It could be possible that the queue was corrupted and this
-	 * call failed. Since we always return NETDEV_TX_OK to mac80211,
-	 * this frame will simply be dropped.
-	 */
-	if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) {
-		clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
-		entry->skb = NULL;
-		ret = -EIO;
-		goto out;
-	}
-
-	/*
-	 * Put BlockAckReqs into our check list for driver BA processing.
-	 */
-	rt2x00queue_bar_check(entry);
-
-	set_bit(ENTRY_DATA_PENDING, &entry->flags);
-
-	rt2x00queue_index_inc(entry, Q_INDEX);
-	rt2x00queue_write_tx_descriptor(entry, &txdesc);
-	rt2x00queue_kick_tx_queue(queue, &txdesc);
-
-out:
-	spin_unlock(&queue->tx_lock);
-	return ret;
-}
-
-int rt2x00queue_clear_beacon(struct rt2x00_dev *rt2x00dev,
-			     struct ieee80211_vif *vif)
-{
-	struct rt2x00_intf *intf = vif_to_intf(vif);
-
-	if (unlikely(!intf->beacon))
-		return -ENOBUFS;
-
-	/*
-	 * Clean up the beacon skb.
-	 */
-	rt2x00queue_free_skb(intf->beacon);
-
-	/*
-	 * Clear beacon (single bssid devices don't need to clear the beacon
-	 * since the beacon queue will get stopped anyway).
-	 */
-	if (rt2x00dev->ops->lib->clear_beacon)
-		rt2x00dev->ops->lib->clear_beacon(intf->beacon);
-
-	return 0;
-}
-
-int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
-			      struct ieee80211_vif *vif)
-{
-	struct rt2x00_intf *intf = vif_to_intf(vif);
-	struct skb_frame_desc *skbdesc;
-	struct txentry_desc txdesc;
-
-	if (unlikely(!intf->beacon))
-		return -ENOBUFS;
-
-	/*
-	 * Clean up the beacon skb.
-	 */
-	rt2x00queue_free_skb(intf->beacon);
-
-	intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif);
-	if (!intf->beacon->skb)
-		return -ENOMEM;
-
-	/*
-	 * Copy all TX descriptor information into txdesc,
-	 * after that we are free to use the skb->cb array
-	 * for our information.
-	 */
-	rt2x00queue_create_tx_descriptor(rt2x00dev, intf->beacon->skb, &txdesc, NULL);
-
-	/*
-	 * Fill in skb descriptor
-	 */
-	skbdesc = get_skb_frame_desc(intf->beacon->skb);
-	memset(skbdesc, 0, sizeof(*skbdesc));
-	skbdesc->entry = intf->beacon;
-
-	/*
-	 * Send beacon to hardware.
-	 */
-	rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc);
-
-	return 0;
-
-}
-
-bool rt2x00queue_for_each_entry(struct data_queue *queue,
-				enum queue_index start,
-				enum queue_index end,
-				void *data,
-				bool (*fn)(struct queue_entry *entry,
-					   void *data))
-{
-	unsigned long irqflags;
-	unsigned int index_start;
-	unsigned int index_end;
-	unsigned int i;
-
-	if (unlikely(start >= Q_INDEX_MAX || end >= Q_INDEX_MAX)) {
-		rt2x00_err(queue->rt2x00dev,
-			   "Entry requested from invalid index range (%d - %d)\n",
-			   start, end);
-		return true;
-	}
-
-	/*
-	 * Only protect the range we are going to loop over,
-	 * if during our loop a extra entry is set to pending
-	 * it should not be kicked during this run, since it
-	 * is part of another TX operation.
-	 */
-	spin_lock_irqsave(&queue->index_lock, irqflags);
-	index_start = queue->index[start];
-	index_end = queue->index[end];
-	spin_unlock_irqrestore(&queue->index_lock, irqflags);
-
-	/*
-	 * Start from the TX done pointer, this guarantees that we will
-	 * send out all frames in the correct order.
-	 */
-	if (index_start < index_end) {
-		for (i = index_start; i < index_end; i++) {
-			if (fn(&queue->entries[i], data))
-				return true;
-		}
-	} else {
-		for (i = index_start; i < queue->limit; i++) {
-			if (fn(&queue->entries[i], data))
-				return true;
-		}
-
-		for (i = 0; i < index_end; i++) {
-			if (fn(&queue->entries[i], data))
-				return true;
-		}
-	}
-
-	return false;
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry);
-
-struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
-					  enum queue_index index)
-{
-	struct queue_entry *entry;
-	unsigned long irqflags;
-
-	if (unlikely(index >= Q_INDEX_MAX)) {
-		rt2x00_err(queue->rt2x00dev, "Entry requested from invalid index type (%d)\n",
-			   index);
-		return NULL;
-	}
-
-	spin_lock_irqsave(&queue->index_lock, irqflags);
-
-	entry = &queue->entries[queue->index[index]];
-
-	spin_unlock_irqrestore(&queue->index_lock, irqflags);
-
-	return entry;
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_get_entry);
-
-void rt2x00queue_index_inc(struct queue_entry *entry, enum queue_index index)
-{
-	struct data_queue *queue = entry->queue;
-	unsigned long irqflags;
-
-	if (unlikely(index >= Q_INDEX_MAX)) {
-		rt2x00_err(queue->rt2x00dev,
-			   "Index change on invalid index type (%d)\n", index);
-		return;
-	}
-
-	spin_lock_irqsave(&queue->index_lock, irqflags);
-
-	queue->index[index]++;
-	if (queue->index[index] >= queue->limit)
-		queue->index[index] = 0;
-
-	entry->last_action = jiffies;
-
-	if (index == Q_INDEX) {
-		queue->length++;
-	} else if (index == Q_INDEX_DONE) {
-		queue->length--;
-		queue->count++;
-	}
-
-	spin_unlock_irqrestore(&queue->index_lock, irqflags);
-}
-
-static void rt2x00queue_pause_queue_nocheck(struct data_queue *queue)
-{
-	switch (queue->qid) {
-	case QID_AC_VO:
-	case QID_AC_VI:
-	case QID_AC_BE:
-	case QID_AC_BK:
-		/*
-		 * For TX queues, we have to disable the queue
-		 * inside mac80211.
-		 */
-		ieee80211_stop_queue(queue->rt2x00dev->hw, queue->qid);
-		break;
-	default:
-		break;
-	}
-}
-void rt2x00queue_pause_queue(struct data_queue *queue)
-{
-	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
-	    !test_bit(QUEUE_STARTED, &queue->flags) ||
-	    test_and_set_bit(QUEUE_PAUSED, &queue->flags))
-		return;
-
-	rt2x00queue_pause_queue_nocheck(queue);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_pause_queue);
-
-void rt2x00queue_unpause_queue(struct data_queue *queue)
-{
-	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
-	    !test_bit(QUEUE_STARTED, &queue->flags) ||
-	    !test_and_clear_bit(QUEUE_PAUSED, &queue->flags))
-		return;
-
-	switch (queue->qid) {
-	case QID_AC_VO:
-	case QID_AC_VI:
-	case QID_AC_BE:
-	case QID_AC_BK:
-		/*
-		 * For TX queues, we have to enable the queue
-		 * inside mac80211.
-		 */
-		ieee80211_wake_queue(queue->rt2x00dev->hw, queue->qid);
-		break;
-	case QID_RX:
-		/*
-		 * For RX we need to kick the queue now in order to
-		 * receive frames.
-		 */
-		queue->rt2x00dev->ops->lib->kick_queue(queue);
-	default:
-		break;
-	}
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_unpause_queue);
-
-void rt2x00queue_start_queue(struct data_queue *queue)
-{
-	mutex_lock(&queue->status_lock);
-
-	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
-	    test_and_set_bit(QUEUE_STARTED, &queue->flags)) {
-		mutex_unlock(&queue->status_lock);
-		return;
-	}
-
-	set_bit(QUEUE_PAUSED, &queue->flags);
-
-	queue->rt2x00dev->ops->lib->start_queue(queue);
-
-	rt2x00queue_unpause_queue(queue);
-
-	mutex_unlock(&queue->status_lock);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_start_queue);
-
-void rt2x00queue_stop_queue(struct data_queue *queue)
-{
-	mutex_lock(&queue->status_lock);
-
-	if (!test_and_clear_bit(QUEUE_STARTED, &queue->flags)) {
-		mutex_unlock(&queue->status_lock);
-		return;
-	}
-
-	rt2x00queue_pause_queue_nocheck(queue);
-
-	queue->rt2x00dev->ops->lib->stop_queue(queue);
-
-	mutex_unlock(&queue->status_lock);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_stop_queue);
-
-void rt2x00queue_flush_queue(struct data_queue *queue, bool drop)
-{
-	bool tx_queue =
-		(queue->qid == QID_AC_VO) ||
-		(queue->qid == QID_AC_VI) ||
-		(queue->qid == QID_AC_BE) ||
-		(queue->qid == QID_AC_BK);
-
-
-	/*
-	 * If we are not supposed to drop any pending
-	 * frames, this means we must force a start (=kick)
-	 * to the queue to make sure the hardware will
-	 * start transmitting.
-	 */
-	if (!drop && tx_queue)
-		queue->rt2x00dev->ops->lib->kick_queue(queue);
-
-	/*
-	 * Check if driver supports flushing, if that is the case we can
-	 * defer the flushing to the driver. Otherwise we must use the
-	 * alternative which just waits for the queue to become empty.
-	 */
-	if (likely(queue->rt2x00dev->ops->lib->flush_queue))
-		queue->rt2x00dev->ops->lib->flush_queue(queue, drop);
-
-	/*
-	 * The queue flush has failed...
-	 */
-	if (unlikely(!rt2x00queue_empty(queue)))
-		rt2x00_warn(queue->rt2x00dev, "Queue %d failed to flush\n",
-			    queue->qid);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_flush_queue);
-
-void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev)
-{
-	struct data_queue *queue;
-
-	/*
-	 * rt2x00queue_start_queue will call ieee80211_wake_queue
-	 * for each queue after is has been properly initialized.
-	 */
-	tx_queue_for_each(rt2x00dev, queue)
-		rt2x00queue_start_queue(queue);
-
-	rt2x00queue_start_queue(rt2x00dev->rx);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_start_queues);
-
-void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev)
-{
-	struct data_queue *queue;
-
-	/*
-	 * rt2x00queue_stop_queue will call ieee80211_stop_queue
-	 * as well, but we are completely shutting doing everything
-	 * now, so it is much safer to stop all TX queues at once,
-	 * and use rt2x00queue_stop_queue for cleaning up.
-	 */
-	ieee80211_stop_queues(rt2x00dev->hw);
-
-	tx_queue_for_each(rt2x00dev, queue)
-		rt2x00queue_stop_queue(queue);
-
-	rt2x00queue_stop_queue(rt2x00dev->rx);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_stop_queues);
-
-void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop)
-{
-	struct data_queue *queue;
-
-	tx_queue_for_each(rt2x00dev, queue)
-		rt2x00queue_flush_queue(queue, drop);
-
-	rt2x00queue_flush_queue(rt2x00dev->rx, drop);
-}
-EXPORT_SYMBOL_GPL(rt2x00queue_flush_queues);
-
-static void rt2x00queue_reset(struct data_queue *queue)
-{
-	unsigned long irqflags;
-	unsigned int i;
-
-	spin_lock_irqsave(&queue->index_lock, irqflags);
-
-	queue->count = 0;
-	queue->length = 0;
-
-	for (i = 0; i < Q_INDEX_MAX; i++)
-		queue->index[i] = 0;
-
-	spin_unlock_irqrestore(&queue->index_lock, irqflags);
-}
-
-void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev)
-{
-	struct data_queue *queue;
-	unsigned int i;
-
-	queue_for_each(rt2x00dev, queue) {
-		rt2x00queue_reset(queue);
-
-		for (i = 0; i < queue->limit; i++)
-			rt2x00dev->ops->lib->clear_entry(&queue->entries[i]);
-	}
-}
-
-static int rt2x00queue_alloc_entries(struct data_queue *queue)
-{
-	struct queue_entry *entries;
-	unsigned int entry_size;
-	unsigned int i;
-
-	rt2x00queue_reset(queue);
-
-	/*
-	 * Allocate all queue entries.
-	 */
-	entry_size = sizeof(*entries) + queue->priv_size;
-	entries = kcalloc(queue->limit, entry_size, GFP_KERNEL);
-	if (!entries)
-		return -ENOMEM;
-
-#define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
-	(((char *)(__base)) + ((__limit) * (__esize)) + \
-	    ((__index) * (__psize)))
-
-	for (i = 0; i < queue->limit; i++) {
-		entries[i].flags = 0;
-		entries[i].queue = queue;
-		entries[i].skb = NULL;
-		entries[i].entry_idx = i;
-		entries[i].priv_data =
-		    QUEUE_ENTRY_PRIV_OFFSET(entries, i, queue->limit,
-					    sizeof(*entries), queue->priv_size);
-	}
-
-#undef QUEUE_ENTRY_PRIV_OFFSET
-
-	queue->entries = entries;
-
-	return 0;
-}
-
-static void rt2x00queue_free_skbs(struct data_queue *queue)
-{
-	unsigned int i;
-
-	if (!queue->entries)
-		return;
-
-	for (i = 0; i < queue->limit; i++) {
-		rt2x00queue_free_skb(&queue->entries[i]);
-	}
-}
-
-static int rt2x00queue_alloc_rxskbs(struct data_queue *queue)
-{
-	unsigned int i;
-	struct sk_buff *skb;
-
-	for (i = 0; i < queue->limit; i++) {
-		skb = rt2x00queue_alloc_rxskb(&queue->entries[i], GFP_KERNEL);
-		if (!skb)
-			return -ENOMEM;
-		queue->entries[i].skb = skb;
-	}
-
-	return 0;
-}
-
-int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev)
-{
-	struct data_queue *queue;
-	int status;
-
-	status = rt2x00queue_alloc_entries(rt2x00dev->rx);
-	if (status)
-		goto exit;
-
-	tx_queue_for_each(rt2x00dev, queue) {
-		status = rt2x00queue_alloc_entries(queue);
-		if (status)
-			goto exit;
-	}
-
-	status = rt2x00queue_alloc_entries(rt2x00dev->bcn);
-	if (status)
-		goto exit;
-
-	if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE)) {
-		status = rt2x00queue_alloc_entries(rt2x00dev->atim);
-		if (status)
-			goto exit;
-	}
-
-	status = rt2x00queue_alloc_rxskbs(rt2x00dev->rx);
-	if (status)
-		goto exit;
-
-	return 0;
-
-exit:
-	rt2x00_err(rt2x00dev, "Queue entries allocation failed\n");
-
-	rt2x00queue_uninitialize(rt2x00dev);
-
-	return status;
-}
-
-void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev)
-{
-	struct data_queue *queue;
-
-	rt2x00queue_free_skbs(rt2x00dev->rx);
-
-	queue_for_each(rt2x00dev, queue) {
-		kfree(queue->entries);
-		queue->entries = NULL;
-	}
-}
-
-static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev,
-			     struct data_queue *queue, enum data_queue_qid qid)
-{
-	mutex_init(&queue->status_lock);
-	spin_lock_init(&queue->tx_lock);
-	spin_lock_init(&queue->index_lock);
-
-	queue->rt2x00dev = rt2x00dev;
-	queue->qid = qid;
-	queue->txop = 0;
-	queue->aifs = 2;
-	queue->cw_min = 5;
-	queue->cw_max = 10;
-
-	rt2x00dev->ops->queue_init(queue);
-
-	queue->threshold = DIV_ROUND_UP(queue->limit, 10);
-}
-
-int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev)
-{
-	struct data_queue *queue;
-	enum data_queue_qid qid;
-	unsigned int req_atim =
-	    rt2x00_has_cap_flag(rt2x00dev, REQUIRE_ATIM_QUEUE);
-
-	/*
-	 * We need the following queues:
-	 * RX: 1
-	 * TX: ops->tx_queues
-	 * Beacon: 1
-	 * Atim: 1 (if required)
-	 */
-	rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim;
-
-	queue = kcalloc(rt2x00dev->data_queues, sizeof(*queue), GFP_KERNEL);
-	if (!queue) {
-		rt2x00_err(rt2x00dev, "Queue allocation failed\n");
-		return -ENOMEM;
-	}
-
-	/*
-	 * Initialize pointers
-	 */
-	rt2x00dev->rx = queue;
-	rt2x00dev->tx = &queue[1];
-	rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues];
-	rt2x00dev->atim = req_atim ? &queue[2 + rt2x00dev->ops->tx_queues] : NULL;
-
-	/*
-	 * Initialize queue parameters.
-	 * RX: qid = QID_RX
-	 * TX: qid = QID_AC_VO + index
-	 * TX: cw_min: 2^5 = 32.
-	 * TX: cw_max: 2^10 = 1024.
-	 * BCN: qid = QID_BEACON
-	 * ATIM: qid = QID_ATIM
-	 */
-	rt2x00queue_init(rt2x00dev, rt2x00dev->rx, QID_RX);
-
-	qid = QID_AC_VO;
-	tx_queue_for_each(rt2x00dev, queue)
-		rt2x00queue_init(rt2x00dev, queue, qid++);
-
-	rt2x00queue_init(rt2x00dev, rt2x00dev->bcn, QID_BEACON);
-	if (req_atim)
-		rt2x00queue_init(rt2x00dev, rt2x00dev->atim, QID_ATIM);
-
-	return 0;
-}
-
-void rt2x00queue_free(struct rt2x00_dev *rt2x00dev)
-{
-	kfree(rt2x00dev->rx);
-	rt2x00dev->rx = NULL;
-	rt2x00dev->tx = NULL;
-	rt2x00dev->bcn = NULL;
-}