1 // SPDX-License-Identifier: ISC 2 /* Copyright (C) 2019 MediaTek Inc. 3 * 4 * Author: Ryder Lee <ryder.lee@mediatek.com> 5 * Roy Luo <royluo@google.com> 6 * Lorenzo Bianconi <lorenzo@kernel.org> 7 * Felix Fietkau <nbd@nbd.name> 8 */ 9 10 #include "mt7615.h" 11 #include "../dma.h" 12 #include "mac.h" 13 14 static int 15 mt7615_init_tx_queues(struct mt7615_dev *dev, int n_desc) 16 { 17 struct mt76_sw_queue *q; 18 struct mt76_queue *hwq; 19 int err, i; 20 21 hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL); 22 if (!hwq) 23 return -ENOMEM; 24 25 err = mt76_queue_alloc(dev, hwq, 0, n_desc, 0, MT_TX_RING_BASE); 26 if (err < 0) 27 return err; 28 29 for (i = 0; i < MT_TXQ_MCU; i++) { 30 q = &dev->mt76.q_tx[i]; 31 INIT_LIST_HEAD(&q->swq); 32 q->q = hwq; 33 } 34 35 return 0; 36 } 37 38 static int 39 mt7615_init_mcu_queue(struct mt7615_dev *dev, struct mt76_sw_queue *q, 40 int idx, int n_desc) 41 { 42 struct mt76_queue *hwq; 43 int err; 44 45 hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL); 46 if (!hwq) 47 return -ENOMEM; 48 49 err = mt76_queue_alloc(dev, hwq, idx, n_desc, 0, MT_TX_RING_BASE); 50 if (err < 0) 51 return err; 52 53 INIT_LIST_HEAD(&q->swq); 54 q->q = hwq; 55 56 return 0; 57 } 58 59 void mt7615_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, 60 struct sk_buff *skb) 61 { 62 struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76); 63 __le32 *rxd = (__le32 *)skb->data; 64 __le32 *end = (__le32 *)&skb->data[skb->len]; 65 enum rx_pkt_type type; 66 67 type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0])); 68 69 switch (type) { 70 case PKT_TYPE_TXS: 71 for (rxd++; rxd + 7 <= end; rxd += 7) 72 mt7615_mac_add_txs(dev, rxd); 73 dev_kfree_skb(skb); 74 break; 75 case PKT_TYPE_TXRX_NOTIFY: 76 mt7615_mac_tx_free(dev, skb); 77 break; 78 case PKT_TYPE_RX_EVENT: 79 mt76_mcu_rx_event(&dev->mt76, skb); 80 break; 81 case PKT_TYPE_NORMAL: 82 if (!mt7615_mac_fill_rx(dev, skb)) { 83 mt76_rx(&dev->mt76, q, skb); 84 return; 85 } 86 /* fall through */ 87 default: 88 dev_kfree_skb(skb); 89 break; 90 } 91 } 92 93 static void mt7615_tx_tasklet(unsigned long data) 94 { 95 struct mt7615_dev *dev = (struct mt7615_dev *)data; 96 97 mt76_txq_schedule_all(&dev->mt76); 98 } 99 100 static int mt7615_poll_tx(struct napi_struct *napi, int budget) 101 { 102 static const u8 queue_map[] = { 103 MT_TXQ_MCU, 104 MT_TXQ_BE 105 }; 106 struct mt7615_dev *dev; 107 int i; 108 109 dev = container_of(napi, struct mt7615_dev, mt76.tx_napi); 110 111 for (i = 0; i < ARRAY_SIZE(queue_map); i++) 112 mt76_queue_tx_cleanup(dev, queue_map[i], false); 113 114 if (napi_complete_done(napi, 0)) 115 mt7615_irq_enable(dev, MT_INT_TX_DONE_ALL); 116 117 for (i = 0; i < ARRAY_SIZE(queue_map); i++) 118 mt76_queue_tx_cleanup(dev, queue_map[i], false); 119 120 tasklet_schedule(&dev->mt76.tx_tasklet); 121 122 return 0; 123 } 124 125 int mt7615_dma_init(struct mt7615_dev *dev) 126 { 127 int ret; 128 129 mt76_dma_attach(&dev->mt76); 130 131 tasklet_init(&dev->mt76.tx_tasklet, mt7615_tx_tasklet, 132 (unsigned long)dev); 133 134 mt76_wr(dev, MT_WPDMA_GLO_CFG, 135 MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE | 136 MT_WPDMA_GLO_CFG_FIFO_LITTLE_ENDIAN | 137 MT_WPDMA_GLO_CFG_FIRST_TOKEN_ONLY | 138 MT_WPDMA_GLO_CFG_OMIT_TX_INFO); 139 140 mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, 141 MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT0, 0x1); 142 143 mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, 144 MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT21, 0x1); 145 146 mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, 147 MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 0x3); 148 149 mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, 150 MT_WPDMA_GLO_CFG_MULTI_DMA_EN, 0x3); 151 152 mt76_wr(dev, MT_WPDMA_GLO_CFG1, 0x1); 153 mt76_wr(dev, MT_WPDMA_TX_PRE_CFG, 0xf0000); 154 mt76_wr(dev, MT_WPDMA_RX_PRE_CFG, 0xf7f0000); 155 mt76_wr(dev, MT_WPDMA_ABT_CFG, 0x4000026); 156 mt76_wr(dev, MT_WPDMA_ABT_CFG1, 0x18811881); 157 mt76_set(dev, 0x7158, BIT(16)); 158 mt76_clear(dev, 0x7000, BIT(23)); 159 mt76_wr(dev, MT_WPDMA_RST_IDX, ~0); 160 161 ret = mt7615_init_tx_queues(dev, MT7615_TX_RING_SIZE); 162 if (ret) 163 return ret; 164 165 ret = mt7615_init_mcu_queue(dev, &dev->mt76.q_tx[MT_TXQ_MCU], 166 MT7615_TXQ_MCU, 167 MT7615_TX_MCU_RING_SIZE); 168 if (ret) 169 return ret; 170 171 ret = mt7615_init_mcu_queue(dev, &dev->mt76.q_tx[MT_TXQ_FWDL], 172 MT7615_TXQ_FWDL, 173 MT7615_TX_FWDL_RING_SIZE); 174 if (ret) 175 return ret; 176 177 /* init rx queues */ 178 ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1, 179 MT7615_RX_MCU_RING_SIZE, MT_RX_BUF_SIZE, 180 MT_RX_RING_BASE); 181 if (ret) 182 return ret; 183 184 ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], 0, 185 MT7615_RX_RING_SIZE, MT_RX_BUF_SIZE, 186 MT_RX_RING_BASE); 187 if (ret) 188 return ret; 189 190 mt76_wr(dev, MT_DELAY_INT_CFG, 0); 191 192 ret = mt76_init_queues(dev); 193 if (ret < 0) 194 return ret; 195 196 netif_tx_napi_add(&dev->mt76.napi_dev, &dev->mt76.tx_napi, 197 mt7615_poll_tx, NAPI_POLL_WEIGHT); 198 napi_enable(&dev->mt76.tx_napi); 199 200 mt76_poll(dev, MT_WPDMA_GLO_CFG, 201 MT_WPDMA_GLO_CFG_TX_DMA_BUSY | 202 MT_WPDMA_GLO_CFG_RX_DMA_BUSY, 0, 1000); 203 204 /* start dma engine */ 205 mt76_set(dev, MT_WPDMA_GLO_CFG, 206 MT_WPDMA_GLO_CFG_TX_DMA_EN | 207 MT_WPDMA_GLO_CFG_RX_DMA_EN); 208 209 /* enable interrupts for TX/RX rings */ 210 mt7615_irq_enable(dev, MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL); 211 212 return 0; 213 } 214 215 void mt7615_dma_cleanup(struct mt7615_dev *dev) 216 { 217 mt76_clear(dev, MT_WPDMA_GLO_CFG, 218 MT_WPDMA_GLO_CFG_TX_DMA_EN | 219 MT_WPDMA_GLO_CFG_RX_DMA_EN); 220 mt76_set(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_SW_RESET); 221 222 tasklet_kill(&dev->mt76.tx_tasklet); 223 mt76_dma_cleanup(&dev->mt76); 224 } 225