mirror of
https://github.com/outbackdingo/mt76.git
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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
/*
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* Copyright (C) 2018 Lorenzo Bianconi <[email protected]>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "mt76.h"
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#include "mt76x02_dma.h"
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int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags)
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{
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struct sk_buff *iter, *last = skb;
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u32 info, pad;
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/* Buffer layout:
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* | 4B | xfer len | pad | 4B |
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* | TXINFO | pkt/cmd | zero pad to 4B | zero |
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*
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* length field of TXINFO should be set to 'xfer len'.
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*/
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info = FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
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FIELD_PREP(MT_TXD_INFO_DPORT, port) | flags;
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put_unaligned_le32(info, skb_push(skb, sizeof(info)));
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pad = round_up(skb->len, 4) + 4 - skb->len;
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skb_walk_frags(skb, iter) {
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last = iter;
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if (!iter->next) {
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skb->data_len += pad;
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skb->len += pad;
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break;
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}
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}
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if (unlikely(pad)) {
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if (skb_pad(last, pad))
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return -ENOMEM;
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__skb_put(last, pad);
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}
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return 0;
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}
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int mt76x02u_set_txinfo(struct sk_buff *skb, struct mt76_wcid *wcid, u8 ep)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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enum mt76_qsel qsel;
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u32 flags;
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if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
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ep == MT_EP_OUT_HCCA)
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qsel = MT_QSEL_MGMT;
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else
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qsel = MT_QSEL_EDCA;
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flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
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MT_TXD_INFO_80211;
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if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
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flags |= MT_TXD_INFO_WIV;
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return mt76x02u_skb_dma_info(skb, WLAN_PORT, flags);
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}
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EXPORT_SYMBOL_GPL(mt76x02u_set_txinfo);
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