diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7615/dma.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7615/dma.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c new file mode 100644 index 000000000000..3ec6582afd8f --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c @@ -0,0 +1,205 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2019 MediaTek Inc. + * + * Author: Ryder Lee <ryder.lee@mediatek.com> + * Roy Luo <royluo@google.com> + * Lorenzo Bianconi <lorenzo@kernel.org> + * Felix Fietkau <nbd@nbd.name> + */ + +#include "mt7615.h" +#include "../dma.h" +#include "mac.h" + +static int +mt7615_init_tx_queues(struct mt7615_dev *dev, int n_desc) +{ + struct mt76_sw_queue *q; + struct mt76_queue *hwq; + int err, i; + + hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL); + if (!hwq) + return -ENOMEM; + + err = mt76_queue_alloc(dev, hwq, 0, n_desc, 0, MT_TX_RING_BASE); + if (err < 0) + return err; + + for (i = 0; i < MT_TXQ_MCU; i++) { + q = &dev->mt76.q_tx[i]; + INIT_LIST_HEAD(&q->swq); + q->q = hwq; + } + + return 0; +} + +static int +mt7615_init_mcu_queue(struct mt7615_dev *dev, struct mt76_sw_queue *q, + int idx, int n_desc) +{ + struct mt76_queue *hwq; + int err; + + hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL); + if (!hwq) + return -ENOMEM; + + err = mt76_queue_alloc(dev, hwq, idx, n_desc, 0, MT_TX_RING_BASE); + if (err < 0) + return err; + + INIT_LIST_HEAD(&q->swq); + q->q = hwq; + + return 0; +} + +void mt7615_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, + struct sk_buff *skb) +{ + struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76); + __le32 *rxd = (__le32 *)skb->data; + __le32 *end = (__le32 *)&skb->data[skb->len]; + enum rx_pkt_type type; + + type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0])); + + switch (type) { + case PKT_TYPE_TXS: + for (rxd++; rxd + 7 <= end; rxd += 7) + mt7615_mac_add_txs(dev, rxd); + dev_kfree_skb(skb); + break; + case PKT_TYPE_TXRX_NOTIFY: + mt7615_mac_tx_free(dev, skb); + break; + case PKT_TYPE_RX_EVENT: + mt76_mcu_rx_event(&dev->mt76, skb); + break; + case PKT_TYPE_NORMAL: + if (!mt7615_mac_fill_rx(dev, skb)) { + mt76_rx(&dev->mt76, q, skb); + return; + } + /* fall through */ + default: + dev_kfree_skb(skb); + break; + } +} + +static void mt7615_tx_tasklet(unsigned long data) +{ + struct mt7615_dev *dev = (struct mt7615_dev *)data; + static const u8 queue_map[] = { + MT_TXQ_MCU, + MT_TXQ_BE + }; + int i; + + for (i = 0; i < ARRAY_SIZE(queue_map); i++) + mt76_queue_tx_cleanup(dev, queue_map[i], false); + + mt76_txq_schedule_all(&dev->mt76); + + mt7615_irq_enable(dev, MT_INT_TX_DONE_ALL); +} + +int mt7615_dma_init(struct mt7615_dev *dev) +{ + int ret; + + mt76_dma_attach(&dev->mt76); + + tasklet_init(&dev->mt76.tx_tasklet, mt7615_tx_tasklet, + (unsigned long)dev); + + mt76_wr(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE | + MT_WPDMA_GLO_CFG_FIFO_LITTLE_ENDIAN | + MT_WPDMA_GLO_CFG_FIRST_TOKEN_ONLY | + MT_WPDMA_GLO_CFG_OMIT_TX_INFO); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT0, 0x1); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_BT_SIZE_BIT21, 0x1); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 0x3); + + mt76_rmw_field(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_MULTI_DMA_EN, 0x3); + + mt76_wr(dev, MT_WPDMA_GLO_CFG1, 0x1); + mt76_wr(dev, MT_WPDMA_TX_PRE_CFG, 0xf0000); + mt76_wr(dev, MT_WPDMA_RX_PRE_CFG, 0xf7f0000); + mt76_wr(dev, MT_WPDMA_ABT_CFG, 0x4000026); + mt76_wr(dev, MT_WPDMA_ABT_CFG1, 0x18811881); + mt76_set(dev, 0x7158, BIT(16)); + mt76_clear(dev, 0x7000, BIT(23)); + mt76_wr(dev, MT_WPDMA_RST_IDX, ~0); + + ret = mt7615_init_tx_queues(dev, MT7615_TX_RING_SIZE); + if (ret) + return ret; + + ret = mt7615_init_mcu_queue(dev, &dev->mt76.q_tx[MT_TXQ_MCU], + MT7615_TXQ_MCU, + MT7615_TX_MCU_RING_SIZE); + if (ret) + return ret; + + ret = mt7615_init_mcu_queue(dev, &dev->mt76.q_tx[MT_TXQ_FWDL], + MT7615_TXQ_FWDL, + MT7615_TX_FWDL_RING_SIZE); + if (ret) + return ret; + + /* init rx queues */ + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1, + MT7615_RX_MCU_RING_SIZE, MT_RX_BUF_SIZE, + MT_RX_RING_BASE); + if (ret) + return ret; + + ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN], 0, + MT7615_RX_RING_SIZE, MT_RX_BUF_SIZE, + MT_RX_RING_BASE); + if (ret) + return ret; + + mt76_wr(dev, MT_DELAY_INT_CFG, 0); + + ret = mt76_init_queues(dev); + if (ret < 0) + return ret; + + mt76_poll(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_DMA_BUSY | + MT_WPDMA_GLO_CFG_RX_DMA_BUSY, 0, 1000); + + /* start dma engine */ + mt76_set(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_DMA_EN | + MT_WPDMA_GLO_CFG_RX_DMA_EN); + + /* enable interrupts for TX/RX rings */ + mt7615_irq_enable(dev, MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL); + + return 0; +} + +void mt7615_dma_cleanup(struct mt7615_dev *dev) +{ + mt76_clear(dev, MT_WPDMA_GLO_CFG, + MT_WPDMA_GLO_CFG_TX_DMA_EN | + MT_WPDMA_GLO_CFG_RX_DMA_EN); + mt76_set(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_SW_RESET); + + tasklet_kill(&dev->mt76.tx_tasklet); + mt76_dma_cleanup(&dev->mt76); +} |