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/*
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "mt76x2u.h"
#include "dma.h"
#include "mt76x02_util.h"
#include "mt76x02_usb.h"
static int
mt76x2u_check_skb_rooms(struct sk_buff *skb)
{
int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
u32 need_head;
need_head = sizeof(struct mt76x02_txwi) + MT_DMA_HDR_LEN;
if (hdr_len % 4)
need_head += 2;
return skb_cow(skb, need_head);
}
int mt76x2u_tx_prepare_skb(struct mt76_dev *mdev, void *data,
struct sk_buff *skb, struct mt76_queue *q,
struct mt76_wcid *wcid, struct ieee80211_sta *sta,
u32 *tx_info)
{
struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
struct mt76x02_txwi *txwi;
int err, len = skb->len;
err = mt76x2u_check_skb_rooms(skb);
if (err < 0)
return -ENOMEM;
mt76x02_insert_hdr_pad(skb);
txwi = skb_push(skb, sizeof(struct mt76x02_txwi));
mt76x2_mac_write_txwi(dev, txwi, skb, wcid, sta, len);
return mt76x02u_set_txinfo(skb, wcid, q2ep(q->hw_idx));
}
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