1 /*
2 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
3 *
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.
7 *
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.
15 */
16
17 #include "mt76x2u.h"
18 #include "dma.h"
19
mt76x2u_remove_dma_hdr(struct sk_buff * skb)20 static void mt76x2u_remove_dma_hdr(struct sk_buff *skb)
21 {
22 int hdr_len;
23
24 skb_pull(skb, sizeof(struct mt76x2_txwi) + MT_DMA_HDR_LEN);
25 hdr_len = ieee80211_get_hdrlen_from_skb(skb);
26 if (hdr_len % 4) {
27 memmove(skb->data + 2, skb->data, hdr_len);
28 skb_pull(skb, 2);
29 }
30 }
31
32 static int
mt76x2u_check_skb_rooms(struct sk_buff * skb)33 mt76x2u_check_skb_rooms(struct sk_buff *skb)
34 {
35 int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
36 u32 need_head;
37
38 need_head = sizeof(struct mt76x2_txwi) + MT_DMA_HDR_LEN;
39 if (hdr_len % 4)
40 need_head += 2;
41 return skb_cow(skb, need_head);
42 }
43
44 static int
mt76x2u_set_txinfo(struct sk_buff * skb,struct mt76_wcid * wcid,u8 ep)45 mt76x2u_set_txinfo(struct sk_buff *skb,
46 struct mt76_wcid *wcid, u8 ep)
47 {
48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
49 enum mt76x2_qsel qsel;
50 u32 flags;
51
52 if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
53 ep == MT_EP_OUT_HCCA)
54 qsel = MT_QSEL_MGMT;
55 else
56 qsel = MT_QSEL_EDCA;
57
58 flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
59 MT_TXD_INFO_80211;
60 if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
61 flags |= MT_TXD_INFO_WIV;
62
63 return mt76u_skb_dma_info(skb, WLAN_PORT, flags);
64 }
65
mt76x2u_tx_status_data(struct mt76_dev * mdev,u8 * update)66 bool mt76x2u_tx_status_data(struct mt76_dev *mdev, u8 *update)
67 {
68 struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
69 struct mt76x2_tx_status stat;
70
71 if (!mt76x2_mac_load_tx_status(dev, &stat))
72 return false;
73
74 mt76x2_send_tx_status(dev, &stat, update);
75
76 return true;
77 }
78
mt76x2u_tx_prepare_skb(struct mt76_dev * mdev,void * data,struct sk_buff * skb,struct mt76_queue * q,struct mt76_wcid * wcid,struct ieee80211_sta * sta,u32 * tx_info)79 int mt76x2u_tx_prepare_skb(struct mt76_dev *mdev, void *data,
80 struct sk_buff *skb, struct mt76_queue *q,
81 struct mt76_wcid *wcid, struct ieee80211_sta *sta,
82 u32 *tx_info)
83 {
84 struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
85 struct mt76x2_txwi *txwi;
86 int err, len = skb->len;
87
88 err = mt76x2u_check_skb_rooms(skb);
89 if (err < 0)
90 return -ENOMEM;
91
92 mt76x2_insert_hdr_pad(skb);
93
94 txwi = skb_push(skb, sizeof(struct mt76x2_txwi));
95 mt76x2_mac_write_txwi(dev, txwi, skb, wcid, sta, len);
96
97 return mt76x2u_set_txinfo(skb, wcid, q2ep(q->hw_idx));
98 }
99
mt76x2u_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue * q,struct mt76_queue_entry * e,bool flush)100 void mt76x2u_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue *q,
101 struct mt76_queue_entry *e, bool flush)
102 {
103 struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
104
105 mt76x2u_remove_dma_hdr(e->skb);
106 mt76x2_tx_complete(dev, e->skb);
107 }
108
109
