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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 "mt76.h"
#include "mt76x02_dma.h"
int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags)
{
struct sk_buff *iter, *last = skb;
u32 info, pad;
/* Buffer layout:
* | 4B | xfer len | pad | 4B |
* | TXINFO | pkt/cmd | zero pad to 4B | zero |
*
* length field of TXINFO should be set to 'xfer len'.
*/
info = FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
FIELD_PREP(MT_TXD_INFO_DPORT, port) | flags;
put_unaligned_le32(info, skb_push(skb, sizeof(info)));
pad = round_up(skb->len, 4) + 4 - skb->len;
skb_walk_frags(skb, iter) {
last = iter;
if (!iter->next) {
skb->data_len += pad;
skb->len += pad;
break;
}
}
if (unlikely(pad)) {
if (skb_pad(last, pad))
return -ENOMEM;
__skb_put(last, pad);
}
return 0;
}
int mt76x02u_set_txinfo(struct sk_buff *skb, struct mt76_wcid *wcid, u8 ep)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
enum mt76_qsel qsel;
u32 flags;
if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
ep == MT_EP_OUT_HCCA)
qsel = MT_QSEL_MGMT;
else
qsel = MT_QSEL_EDCA;
flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
MT_TXD_INFO_80211;
if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
flags |= MT_TXD_INFO_WIV;
return mt76x02u_skb_dma_info(skb, WLAN_PORT, flags);
}
EXPORT_SYMBOL_GPL(mt76x02u_set_txinfo);
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