Release 4.11 drivers/net/wireless/ralink/rt2x00/rt2x00queue.c

/*
        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));

	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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
121
53.30%
2
18.18%
Ivo van Doorn
50
22.03%
4
36.36%
Stanislaw Gruszka
33
14.54%
1
9.09%
Stanislaw W. Gruszka
13
5.73%
1
9.09%
Helmut Schaa
6
2.64%
1
9.09%
Fred Chou
3
1.32%
1
9.09%
Gabor Juhos
1
0.44%
1
9.09%
Total
227
100.00%
11
100.00%



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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
42
49.41%
1
33.33%
Stanislaw Gruszka
22
25.88%
1
33.33%
Ivo van Doorn
21
24.71%
1
33.33%
Total
85
100.00%
3
100.00%


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;
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
82
78.85%
1
33.33%
Ivo van Doorn
21
20.19%
1
33.33%
Helmut Schaa
1
0.96%
1
33.33%
Total
104
100.00%
3
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
20
55.56%
3
60.00%
Gertjan van Wingerde
16
44.44%
2
40.00%
Total
36
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
64
100.00%
2
100.00%
Total
64
100.00%
2
100.00%

/*
 * 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
42
68.85%
2
33.33%
Stanislaw Gruszka
10
16.39%
1
16.67%
Gertjan van Wingerde
9
14.75%
3
50.00%
Total
61
100.00%
6
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
43
70.49%
2
40.00%
Gertjan van Wingerde
14
22.95%
2
40.00%
Stanislaw Gruszka
4
6.56%
1
20.00%
Total
61
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
86
48.86%
6
46.15%
Stanislaw Gruszka
49
27.84%
2
15.38%
Helmut Schaa
19
10.80%
1
7.69%
Johannes Berg
12
6.82%
2
15.38%
Gertjan van Wingerde
7
3.98%
1
7.69%
Fred Chou
3
1.70%
1
7.69%
Total
176
100.00%
13
100.00%



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;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
209
73.59%
3
42.86%
Helmut Schaa
66
23.24%
2
28.57%
Gertjan van Wingerde
7
2.46%
1
14.29%
Johannes Berg
2
0.70%
1
14.29%
Total
284
100.00%
7
100.00%



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;
	u8 density = 0;

	if (sta) {
		sta_priv = sta_to_rt2x00_sta(sta);
		txdesc->u.ht.wcid = sta_priv->wcid;
		density = sta->ht_cap.ampdu_density;
	}

	/*
         * 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;
	}

	/*
         * 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);
		txdesc->u.ht.mpdu_density = density;
		txdesc->u.ht.ba_size = 7; /* FIXME: What value is needed? */
	}

	/*
         * 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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
290
67.76%
2
28.57%
Stanislaw Gruszka
103
24.07%
2
28.57%
Helmut Schaa
28
6.54%
1
14.29%
Thomas Huehn
5
1.17%
1
14.29%
Johannes Berg
2
0.47%
1
14.29%
Total
428
100.00%
7
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
339
69.90%
7
38.89%
Helmut Schaa
97
20.00%
4
22.22%
Gertjan van Wingerde
31
6.39%
4
22.22%
Johannes Berg
8
1.65%
1
5.56%
Thomas Huehn
7
1.44%
1
5.56%
Fred Chou
3
0.62%
1
5.56%
Total
485
100.00%
18
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
135
91.84%
2
40.00%
Stanislaw Gruszka
6
4.08%
1
20.00%
Joe Perches
3
2.04%
1
20.00%
Fred Chou
3
2.04%
1
20.00%
Total
147
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
50
96.15%
4
66.67%
Gertjan van Wingerde
2
3.85%
2
33.33%
Total
52
100.00%
6
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
34
70.83%
4
80.00%
Gertjan van Wingerde
14
29.17%
1
20.00%
Total
48
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Helmut Schaa
177
100.00%
1
100.00%
Total
177
100.00%
1
100.00%



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;
	}

	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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
198
46.59%
11
39.29%
Gertjan van Wingerde
126
29.65%
5
17.86%
Johannes Berg
67
15.76%
2
7.14%
Helmut Schaa
9
2.12%
2
7.14%
Fred Chou
9
2.12%
1
3.57%
Stanislaw Gruszka
7
1.65%
2
7.14%
Joe Perches
5
1.18%
1
3.57%
Thomas Huehn
1
0.24%
1
3.57%
Daniel Mack
1
0.24%
1
3.57%
Johannes Stezenbach
1
0.24%
1
3.57%
Lucas De Marchi
1
0.24%
1
3.57%
Total
425
100.00%
28
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
50
67.57%
3
60.00%
Helmut Schaa
16
21.62%
1
20.00%
Igor Perminov
8
10.81%
1
20.00%
Total
74
100.00%
5
100.00%



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));

	/*
         * Send beacon to hardware.
         */
	rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc);

	return 0;

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
78
53.42%
1
14.29%
Helmut Schaa
59
40.41%
2
28.57%
Gertjan van Wingerde
6
4.11%
2
28.57%
Thomas Huehn
2
1.37%
1
14.29%
Stanislaw Gruszka
1
0.68%
1
14.29%
Total
146
100.00%
7
100.00%



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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
193
80.42%
2
33.33%
Helmut Schaa
45
18.75%
2
33.33%
Lucas De Marchi
1
0.42%
1
16.67%
Joe Perches
1
0.42%
1
16.67%
Total
240
100.00%
6
100.00%


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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
87
98.86%
3
75.00%
Joe Perches
1
1.14%
1
25.00%
Total
88
100.00%
4
100.00%


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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
125
90.58%
5
71.43%
Johannes Stezenbach
12
8.70%
1
14.29%
Joe Perches
1
0.72%
1
14.29%
Total
138
100.00%
7
100.00%



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;
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Stanislaw W. Gruszka
47
97.92%
1
50.00%
Jingoo Han
1
2.08%
1
50.00%
Total
48
100.00%
2
100.00%



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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
51
98.08%
1
50.00%
Stanislaw W. Gruszka
1
1.92%
1
50.00%
Total
52
100.00%
2
100.00%


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;
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
102
100.00%
3
100.00%
Total
102
100.00%
3
100.00%


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
90
100.00%
1
100.00%
Total
90
100.00%
1
100.00%


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
67
98.53%
1
50.00%
Stanislaw W. Gruszka
1
1.47%
1
50.00%
Total
68
100.00%
2
100.00%


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
122
97.60%
3
50.00%
Joe Perches
1
0.80%
1
16.67%
Stanislaw W. Gruszka
1
0.80%
1
16.67%
Johannes Stezenbach
1
0.80%
1
16.67%
Total
125
100.00%
6
100.00%


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
34
100.00%
1
100.00%
Total
34
100.00%
1
100.00%


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
41
100.00%
1
100.00%
Total
41
100.00%
1
100.00%


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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
40
100.00%
1
100.00%
Total
40
100.00%
1
100.00%


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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
73
100.00%
5
100.00%
Total
73
100.00%
5
100.00%



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]);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
64
100.00%
3
100.00%
Total
64
100.00%
3
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
168
97.11%
1
25.00%
Joe Perches
2
1.16%
1
25.00%
Gabor Juhos
2
1.16%
1
25.00%
Mark Einon
1
0.58%
1
25.00%
Total
173
100.00%
4
100.00%



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]);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
50
98.04%
1
50.00%
Ivo van Doorn
1
1.96%
1
50.00%
Total
51
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Gertjan van Wingerde
69
92.00%
2
50.00%
Ivo van Doorn
4
5.33%
1
25.00%
Helmut Schaa
2
2.67%
1
25.00%
Total
75
100.00%
4
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
111
82.22%
1
16.67%
Gertjan van Wingerde
19
14.07%
3
50.00%
Fred Chou
3
2.22%
1
16.67%
Joe Perches
2
1.48%
1
16.67%
Total
135
100.00%
6
100.00%



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;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
36
83.72%
1
50.00%
Gertjan van Wingerde
7
16.28%
1
50.00%
Total
43
100.00%
2
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
72
70.59%
4
57.14%
Gabor Juhos
22
21.57%
2
28.57%
Gertjan van Wingerde
8
7.84%
1
14.29%
Total
102
100.00%
7
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
161
82.99%
4
44.44%
Gertjan van Wingerde
26
13.40%
2
22.22%
Joe Perches
4
2.06%
2
22.22%
Fred Chou
3
1.55%
1
11.11%
Total
194
100.00%
9
100.00%



void rt2x00queue_free(struct rt2x00_dev *rt2x00dev)
{
	kfree(rt2x00dev->rx);
	rt2x00dev->rx = NULL;
	rt2x00dev->tx = NULL;
	rt2x00dev->bcn = NULL;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Ivo van Doorn
3045
58.87%
45
39.13%
Gertjan van Wingerde
1094
21.15%
20
17.39%
Helmut Schaa
525
10.15%
15
13.04%
Stanislaw Gruszka
236
4.56%
9
7.83%
Johannes Berg
91
1.76%
6
5.22%
Stanislaw W. Gruszka
63
1.22%
3
2.61%
Fred Chou
27
0.52%
1
0.87%
Gabor Juhos
25
0.48%
4
3.48%
Joe Perches
20
0.39%
2
1.74%
Thomas Huehn
15
0.29%
1
0.87%
Johannes Stezenbach
14
0.27%
2
1.74%
Igor Perminov
8
0.15%
1
0.87%
Tejun Heo
3
0.06%
1
0.87%
Lucas De Marchi
2
0.04%
1
0.87%
Mark Einon
1
0.02%
1
0.87%
Jeff Kirsher
1
0.02%
1
0.87%
Jingoo Han
1
0.02%
1
0.87%
Daniel Mack
1
0.02%
1
0.87%
Total
5172
100.00%
115
100.00%
Directory: drivers/net/wireless/ralink/rt2x00

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.