mirror of
https://github.com/outbackdingo/mt76.git
synced 2026-10-24 21:36:52 +00:00
Hauke MehrtensandFelix Fietkau
bddaa9c449
mt76 uses __skb_pad() with free_on_error set to true, this is the same
as calling skb_pad().
This patch does not change any functionality, but it makes it easier to
backport this driver in backports, because skb_pad() is also available
in older kernel versions.
Fixes: b40b15e1521f ("mt76: add usb support to mt76 layer")
Signed-off-by: Hauke Mehrtens <[email protected]>
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2018 Lorenzo Bianconi <[email protected]>
|
|
*
|
|
* 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);
|