1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2021 MediaTek Inc. */
3 
4 #include "mt7921.h"
5 #include "../dma.h"
6 #include "../mt76_connac2_mac.h"
7 
8 int mt7921e_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
9 			   enum mt76_txq_id qid, struct mt76_wcid *wcid,
10 			   struct ieee80211_sta *sta,
11 			   struct mt76_tx_info *tx_info)
12 {
13 	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
14 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
15 	struct ieee80211_key_conf *key = info->control.hw_key;
16 	struct mt76_connac_hw_txp *txp;
17 	struct mt76_txwi_cache *t;
18 	int id, pid;
19 	u8 *txwi = (u8 *)txwi_ptr;
20 
21 	if (unlikely(tx_info->skb->len <= ETH_HLEN))
22 		return -EINVAL;
23 
24 	if (!wcid)
25 		wcid = &dev->mt76.global_wcid;
26 
27 	t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size);
28 	t->skb = tx_info->skb;
29 
30 	id = mt76_token_consume(mdev, &t);
31 	if (id < 0)
32 		return id;
33 
34 	if (sta) {
35 		struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
36 
37 		if (time_after(jiffies, msta->last_txs + HZ / 4)) {
38 			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
39 			msta->last_txs = jiffies;
40 		}
41 	}
42 
43 	pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
44 	mt76_connac2_mac_write_txwi(mdev, txwi_ptr, tx_info->skb, wcid, key,
45 				    pid, qid, 0);
46 
47 	txp = (struct mt76_connac_hw_txp *)(txwi + MT_TXD_SIZE);
48 	memset(txp, 0, sizeof(struct mt76_connac_hw_txp));
49 	mt76_connac_write_hw_txp(mdev, tx_info, txp, id);
50 
51 	tx_info->skb = DMA_DUMMY_DATA;
52 
53 	return 0;
54 }
55 
56 void mt7921_tx_token_put(struct mt7921_dev *dev)
57 {
58 	struct mt76_txwi_cache *txwi;
59 	int id;
60 
61 	spin_lock_bh(&dev->mt76.token_lock);
62 	idr_for_each_entry(&dev->mt76.token, txwi, id) {
63 		mt7921_txwi_free(dev, txwi, NULL, false, NULL);
64 		dev->mt76.token_count--;
65 	}
66 	spin_unlock_bh(&dev->mt76.token_lock);
67 	idr_destroy(&dev->mt76.token);
68 }
69 
70 int mt7921e_mac_reset(struct mt7921_dev *dev)
71 {
72 	int i, err;
73 
74 	mt7921e_mcu_drv_pmctrl(dev);
75 
76 	mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
77 
78 	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
79 	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
80 
81 	set_bit(MT76_RESET, &dev->mphy.state);
82 	set_bit(MT76_MCU_RESET, &dev->mphy.state);
83 	wake_up(&dev->mt76.mcu.wait);
84 	skb_queue_purge(&dev->mt76.mcu.res_q);
85 
86 	mt76_txq_schedule_all(&dev->mphy);
87 
88 	mt76_worker_disable(&dev->mt76.tx_worker);
89 	napi_disable(&dev->mt76.napi[MT_RXQ_MAIN]);
90 	napi_disable(&dev->mt76.napi[MT_RXQ_MCU]);
91 	napi_disable(&dev->mt76.napi[MT_RXQ_MCU_WA]);
92 	napi_disable(&dev->mt76.tx_napi);
93 
94 	mt7921_tx_token_put(dev);
95 	idr_init(&dev->mt76.token);
96 
97 	mt7921_wpdma_reset(dev, true);
98 
99 	local_bh_disable();
100 	mt76_for_each_q_rx(&dev->mt76, i) {
101 		napi_enable(&dev->mt76.napi[i]);
102 		napi_schedule(&dev->mt76.napi[i]);
103 	}
104 	local_bh_enable();
105 
106 	dev->fw_assert = false;
107 	clear_bit(MT76_MCU_RESET, &dev->mphy.state);
108 
109 	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA,
110 		MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL |
111 		MT_INT_MCU_CMD);
112 	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
113 
114 	err = mt7921e_driver_own(dev);
115 	if (err)
116 		goto out;
117 
118 	err = mt7921_run_firmware(dev);
119 	if (err)
120 		goto out;
121 
122 	err = mt7921_mcu_set_eeprom(dev);
123 	if (err)
124 		goto out;
125 
126 	err = mt7921_mac_init(dev);
127 	if (err)
128 		goto out;
129 
130 	err = __mt7921_start(&dev->phy);
131 out:
132 	clear_bit(MT76_RESET, &dev->mphy.state);
133 
134 	local_bh_disable();
135 	napi_enable(&dev->mt76.tx_napi);
136 	napi_schedule(&dev->mt76.tx_napi);
137 	local_bh_enable();
138 
139 	mt76_worker_enable(&dev->mt76.tx_worker);
140 
141 	return err;
142 }
143