2 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 static void mt76x02u_remove_dma_hdr(struct sk_buff *skb)
23 skb_pull(skb, sizeof(struct mt76x02_txwi) + MT_DMA_HDR_LEN);
24 hdr_len = ieee80211_get_hdrlen_from_skb(skb);
26 mt76x02_remove_hdr_pad(skb, 2);
29 void mt76x02u_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue *q,
30 struct mt76_queue_entry *e, bool flush)
32 mt76x02u_remove_dma_hdr(e->skb);
33 mt76_tx_complete_skb(mdev, e->skb);
35 EXPORT_SYMBOL_GPL(mt76x02u_tx_complete_skb);
37 int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags)
39 struct sk_buff *iter, *last = skb;
43 * | 4B | xfer len | pad | 4B |
44 * | TXINFO | pkt/cmd | zero pad to 4B | zero |
46 * length field of TXINFO should be set to 'xfer len'.
48 info = FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
49 FIELD_PREP(MT_TXD_INFO_DPORT, port) | flags;
50 put_unaligned_le32(info, skb_push(skb, sizeof(info)));
52 /* Add zero pad of 4 - 7 bytes */
53 pad = round_up(skb->len, 4) + 4 - skb->len;
55 /* First packet of a A-MSDU burst keeps track of the whole burst
56 * length, need to update lenght of it and the last packet.
58 skb_walk_frags(skb, iter) {
67 if (skb_pad(last, pad))
74 int mt76x02u_tx_prepare_skb(struct mt76_dev *mdev, void *data,
75 struct sk_buff *skb, struct mt76_queue *q,
76 struct mt76_wcid *wcid, struct ieee80211_sta *sta,
79 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
80 struct mt76x02_txwi *txwi;
86 mt76x02_insert_hdr_pad(skb);
88 txwi = skb_push(skb, sizeof(struct mt76x02_txwi));
89 mt76x02_mac_write_txwi(dev, txwi, skb, wcid, sta, len);
91 pid = mt76_tx_status_skb_add(mdev, wcid, skb);
94 if (pid >= MT_PACKET_ID_FIRST || q2ep(q->hw_idx) == MT_EP_OUT_HCCA)
99 flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
101 if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
102 flags |= MT_TXD_INFO_WIV;
104 return mt76x02u_skb_dma_info(skb, WLAN_PORT, flags);
106 EXPORT_SYMBOL_GPL(mt76x02u_tx_prepare_skb);