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path: root/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
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Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7615/dma.c')
-rw-r--r--drivers/net/wireless/mediatek/mt76/mt7615/dma.c205
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);
+}