1 // SPDX-License-Identifier: ISC
2 
3 #include "mt7603.h"
4 #include "mac.h"
5 #include "../dma.h"
6 
7 static void
8 mt7603_rx_loopback_skb(struct mt7603_dev *dev, struct sk_buff *skb)
9 {
10 	static const u8 tid_to_ac[8] = {
11 		IEEE80211_AC_BE,
12 		IEEE80211_AC_BK,
13 		IEEE80211_AC_BK,
14 		IEEE80211_AC_BE,
15 		IEEE80211_AC_VI,
16 		IEEE80211_AC_VI,
17 		IEEE80211_AC_VO,
18 		IEEE80211_AC_VO
19 	};
20 	__le32 *txd = (__le32 *)skb->data;
21 	struct ieee80211_hdr *hdr;
22 	struct ieee80211_sta *sta;
23 	struct mt7603_sta *msta;
24 	struct mt76_wcid *wcid;
25 	void *priv;
26 	int idx;
27 	u32 val;
28 	u8 tid = 0;
29 
30 	if (skb->len < MT_TXD_SIZE + sizeof(struct ieee80211_hdr))
31 		goto free;
32 
33 	val = le32_to_cpu(txd[1]);
34 	idx = FIELD_GET(MT_TXD1_WLAN_IDX, val);
35 	skb->priority = FIELD_GET(MT_TXD1_TID, val);
36 
37 	if (idx >= MT7603_WTBL_STA - 1)
38 		goto free;
39 
40 	wcid = rcu_dereference(dev->mt76.wcid[idx]);
41 	if (!wcid)
42 		goto free;
43 
44 	priv = msta = container_of(wcid, struct mt7603_sta, wcid);
45 	val = le32_to_cpu(txd[0]);
46 	val &= ~(MT_TXD0_P_IDX | MT_TXD0_Q_IDX);
47 	val |= FIELD_PREP(MT_TXD0_Q_IDX, MT_TX_HW_QUEUE_MGMT);
48 	txd[0] = cpu_to_le32(val);
49 
50 	sta = container_of(priv, struct ieee80211_sta, drv_priv);
51 	hdr = (struct ieee80211_hdr *)&skb->data[MT_TXD_SIZE];
52 	if (ieee80211_is_data_qos(hdr->frame_control))
53 		tid = *ieee80211_get_qos_ctl(hdr) &
54 		      IEEE80211_QOS_CTL_TAG1D_MASK;
55 	skb_set_queue_mapping(skb, tid_to_ac[tid]);
56 	ieee80211_sta_set_buffered(sta, tid, true);
57 
58 	spin_lock_bh(&dev->ps_lock);
59 	__skb_queue_tail(&msta->psq, skb);
60 	if (skb_queue_len(&msta->psq) >= 64) {
61 		skb = __skb_dequeue(&msta->psq);
62 		dev_kfree_skb(skb);
63 	}
64 	spin_unlock_bh(&dev->ps_lock);
65 	return;
66 
67 free:
68 	dev_kfree_skb(skb);
69 }
70 
71 void mt7603_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
72 			 struct sk_buff *skb)
73 {
74 	struct mt7603_dev *dev = container_of(mdev, struct mt7603_dev, mt76);
75 	__le32 *rxd = (__le32 *)skb->data;
76 	__le32 *end = (__le32 *)&skb->data[skb->len];
77 	enum rx_pkt_type type;
78 
79 	type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
80 
81 	if (q == MT_RXQ_MCU) {
82 		if (type == PKT_TYPE_RX_EVENT)
83 			mt76_mcu_rx_event(&dev->mt76, skb);
84 		else
85 			mt7603_rx_loopback_skb(dev, skb);
86 		return;
87 	}
88 
89 	switch (type) {
90 	case PKT_TYPE_TXS:
91 		for (rxd++; rxd + 5 <= end; rxd += 5)
92 			mt7603_mac_add_txs(dev, rxd);
93 		dev_kfree_skb(skb);
94 		break;
95 	case PKT_TYPE_RX_EVENT:
96 		mt76_mcu_rx_event(&dev->mt76, skb);
97 		return;
98 	case PKT_TYPE_NORMAL:
99 		if (mt7603_mac_fill_rx(dev, skb) == 0) {
100 			mt76_rx(&dev->mt76, q, skb);
101 			return;
102 		}
103 		fallthrough;
104 	default:
105 		dev_kfree_skb(skb);
106 		break;
107 	}
108 }
109 
110 static int
111 mt7603_init_rx_queue(struct mt7603_dev *dev, struct mt76_queue *q,
112 		     int idx, int n_desc, int bufsize)
113 {
114 	int err;
115 
116 	err = mt76_queue_alloc(dev, q, idx, n_desc, bufsize,
117 			       MT_RX_RING_BASE);
118 	if (err < 0)
119 		return err;
120 
121 	mt7603_irq_enable(dev, MT_INT_RX_DONE(idx));
122 
123 	return 0;
124 }
125 
126 static int mt7603_poll_tx(struct napi_struct *napi, int budget)
127 {
128 	struct mt7603_dev *dev;
129 	int i;
130 
131 	dev = container_of(napi, struct mt7603_dev, mt76.tx_napi);
132 	dev->tx_dma_check = 0;
133 
134 	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false);
135 	for (i = MT_TXQ_PSD; i >= 0; i--)
136 		mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], false);
137 
138 	if (napi_complete_done(napi, 0))
139 		mt7603_irq_enable(dev, MT_INT_TX_DONE_ALL);
140 
141 	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false);
142 	for (i = MT_TXQ_PSD; i >= 0; i--)
143 		mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], false);
144 
145 	mt7603_mac_sta_poll(dev);
146 
147 	mt76_worker_schedule(&dev->mt76.tx_worker);
148 
149 	return 0;
150 }
151 
152 int mt7603_dma_init(struct mt7603_dev *dev)
153 {
154 	static const u8 wmm_queue_map[] = {
155 		[IEEE80211_AC_BK] = 0,
156 		[IEEE80211_AC_BE] = 1,
157 		[IEEE80211_AC_VI] = 2,
158 		[IEEE80211_AC_VO] = 3,
159 	};
160 	int ret;
161 	int i;
162 
163 	mt76_dma_attach(&dev->mt76);
164 
165 	mt76_clear(dev, MT_WPDMA_GLO_CFG,
166 		   MT_WPDMA_GLO_CFG_TX_DMA_EN |
167 		   MT_WPDMA_GLO_CFG_RX_DMA_EN |
168 		   MT_WPDMA_GLO_CFG_DMA_BURST_SIZE |
169 		   MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
170 
171 	mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);
172 	mt7603_pse_client_reset(dev);
173 
174 	for (i = 0; i < ARRAY_SIZE(wmm_queue_map); i++) {
175 		ret = mt76_init_tx_queue(&dev->mphy, i, wmm_queue_map[i],
176 					 MT7603_TX_RING_SIZE, MT_TX_RING_BASE, 0);
177 		if (ret)
178 			return ret;
179 	}
180 
181 	ret = mt76_init_tx_queue(&dev->mphy, MT_TXQ_PSD, MT_TX_HW_QUEUE_MGMT,
182 				 MT7603_PSD_RING_SIZE, MT_TX_RING_BASE, 0);
183 	if (ret)
184 		return ret;
185 
186 	ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WM, MT_TX_HW_QUEUE_MCU,
187 				  MT_MCU_RING_SIZE, MT_TX_RING_BASE);
188 	if (ret)
189 		return ret;
190 
191 	ret = mt76_init_tx_queue(&dev->mphy, MT_TXQ_BEACON, MT_TX_HW_QUEUE_BCN,
192 				 MT_MCU_RING_SIZE, MT_TX_RING_BASE, 0);
193 	if (ret)
194 		return ret;
195 
196 	ret = mt76_init_tx_queue(&dev->mphy, MT_TXQ_CAB, MT_TX_HW_QUEUE_BMC,
197 				 MT_MCU_RING_SIZE, MT_TX_RING_BASE, 0);
198 	if (ret)
199 		return ret;
200 
201 	mt7603_irq_enable(dev,
202 			  MT_INT_TX_DONE(IEEE80211_AC_VO) |
203 			  MT_INT_TX_DONE(IEEE80211_AC_VI) |
204 			  MT_INT_TX_DONE(IEEE80211_AC_BE) |
205 			  MT_INT_TX_DONE(IEEE80211_AC_BK) |
206 			  MT_INT_TX_DONE(MT_TX_HW_QUEUE_MGMT) |
207 			  MT_INT_TX_DONE(MT_TX_HW_QUEUE_MCU) |
208 			  MT_INT_TX_DONE(MT_TX_HW_QUEUE_BCN) |
209 			  MT_INT_TX_DONE(MT_TX_HW_QUEUE_BMC));
210 
211 	ret = mt7603_init_rx_queue(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1,
212 				   MT7603_MCU_RX_RING_SIZE, MT_RX_BUF_SIZE);
213 	if (ret)
214 		return ret;
215 
216 	ret = mt7603_init_rx_queue(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], 0,
217 				   MT7603_RX_RING_SIZE, MT_RX_BUF_SIZE);
218 	if (ret)
219 		return ret;
220 
221 	mt76_wr(dev, MT_DELAY_INT_CFG, 0);
222 	ret = mt76_init_queues(dev, mt76_dma_rx_poll);
223 	if (ret)
224 		return ret;
225 
226 	netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi,
227 			  mt7603_poll_tx);
228 	napi_enable(&dev->mt76.tx_napi);
229 
230 	return 0;
231 }
232 
233 void mt7603_dma_cleanup(struct mt7603_dev *dev)
234 {
235 	mt76_clear(dev, MT_WPDMA_GLO_CFG,
236 		   MT_WPDMA_GLO_CFG_TX_DMA_EN |
237 		   MT_WPDMA_GLO_CFG_RX_DMA_EN |
238 		   MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
239 
240 	mt76_dma_cleanup(&dev->mt76);
241 }
242