/*
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* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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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 "mt76x2u.h"
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#include "dma.h"
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static void mt76x2u_remove_dma_hdr(struct sk_buff *skb)
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{
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int hdr_len;
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skb_pull(skb, sizeof(struct mt76x2_txwi) + MT_DMA_HDR_LEN);
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hdr_len = ieee80211_get_hdrlen_from_skb(skb);
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if (hdr_len % 4) {
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memmove(skb->data + 2, skb->data, hdr_len);
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skb_pull(skb, 2);
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}
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}
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static int
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mt76x2u_check_skb_rooms(struct sk_buff *skb)
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{
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int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
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u32 need_head;
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need_head = sizeof(struct mt76x2_txwi) + MT_DMA_HDR_LEN;
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if (hdr_len % 4)
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need_head += 2;
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return skb_cow(skb, need_head);
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}
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static int
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mt76x2u_set_txinfo(struct sk_buff *skb,
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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 mt76x2_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 mt76u_skb_dma_info(skb, WLAN_PORT, flags);
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}
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bool mt76x2u_tx_status_data(struct mt76_dev *mdev, u8 *update)
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{
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struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
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struct mt76x2_tx_status stat;
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if (!mt76x2_mac_load_tx_status(dev, &stat))
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return false;
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mt76x2_send_tx_status(dev, &stat, update);
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return true;
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}
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int mt76x2u_tx_prepare_skb(struct mt76_dev *mdev, void *data,
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struct sk_buff *skb, struct mt76_queue *q,
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struct mt76_wcid *wcid, struct ieee80211_sta *sta,
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u32 *tx_info)
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{
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struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
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struct mt76x2_txwi *txwi;
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int err, len = skb->len;
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err = mt76x2u_check_skb_rooms(skb);
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if (err < 0)
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return -ENOMEM;
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mt76x2_insert_hdr_pad(skb);
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txwi = skb_push(skb, sizeof(struct mt76x2_txwi));
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mt76x2_mac_write_txwi(dev, txwi, skb, wcid, sta, len);
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return mt76x2u_set_txinfo(skb, wcid, q2ep(q->hw_idx));
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}
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void mt76x2u_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue *q,
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struct mt76_queue_entry *e, bool flush)
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{
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struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
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mt76x2u_remove_dma_hdr(e->skb);
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mt76x2_tx_complete(dev, e->skb);
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}
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