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wifi: mt76: mt792x: factor out common DMA queue allocation

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The mt792x PCIe DMA setup uses the same standard queue allocation
sequence for data, MCU, firmware download and RX rings.

Factor this part out into a small common helper so later chip support
can reuse the existing flow without duplicating the queue setup logic.

This keeps the common DMA skeleton in one place and makes follow-up
chip-specific DMA changes smaller and easier to review.

Signed-off-by: Sean Wang <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Sean Wang
2026-05-28 13:32:33 +02:00
committed by Felix Fietkau
parent d045c72b29
commit b81028de36
2 changed files with 75 additions and 0 deletions
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mt792x_dma.c
+56
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@@ -87,6 +87,62 @@ void mt792x_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
}
EXPORT_SYMBOL_GPL(mt792x_rx_poll_complete);
int mt792x_dma_alloc_queues(struct mt792x_dev *dev,
const struct mt792x_dma_layout *layout)
{
int ret;
mt76_dma_attach(&dev->mt76);
ret = mt792x_dma_disable(dev, true);
if (ret)
return ret;
/* init tx queue */
ret = mt76_connac_init_tx_queues(dev->phy.mt76, layout->tx_data0.qid,
layout->tx_data0.n_desc,
layout->tx_data0.ring_base,
NULL, 0);
if (ret)
return ret;
mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, 0x4);
/* command to WM */
ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WM,
layout->tx_mcu.qid,
layout->tx_mcu.n_desc,
layout->tx_mcu.ring_base);
if (ret)
return ret;
/* firmware download */
ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_FWDL,
layout->tx_fwdl.qid,
layout->tx_fwdl.n_desc,
layout->tx_fwdl.ring_base);
if (ret)
return ret;
/* rx event */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU],
layout->rx_mcu.qid,
layout->rx_mcu.n_desc,
MT_RX_BUF_SIZE,
layout->rx_mcu.ring_base);
if (ret)
return ret;
/* rx data */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN],
layout->rx_data.qid,
layout->rx_data.n_desc,
MT_RX_BUF_SIZE,
layout->rx_data.ring_base);
return ret;
}
EXPORT_SYMBOL_GPL(mt792x_dma_alloc_queues);
#define PREFETCH(base, depth) ((base) << 16 | (depth))
static void mt792x_dma_prefetch(struct mt792x_dev *dev)
{