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dma: add function for resetting the state of an rx queue

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Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2016-02-28 21:14:48 +01:00
parent fb818ab727
commit a957f7480e
2 changed files with 30 additions and 5 deletions
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dma.c
+27 -5
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@@ -122,6 +122,13 @@ mt76_dma_tx_cleanup_idx(struct mt76_dev *dev, struct mt76_queue *q, int idx,
memset(e, 0, sizeof(*e));
}
static void
mt76_dma_sync_idx(struct mt76_dev *dev, struct mt76_queue *q)
{
q->tail = q->head = ioread32(&q->regs->dma_idx);
iowrite32(q->head, &q->regs->cpu_idx);
}
static void
mt76_dma_tx_cleanup(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush)
{
@@ -155,12 +162,12 @@ mt76_dma_tx_cleanup(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush)
if (!flush && q->tail == last)
last = ioread32(&q->regs->dma_idx);
}
if (!flush) {
if (!flush)
mt76_txq_schedule(dev, q);
} else {
iowrite32(q->tail, &q->regs->dma_idx);
iowrite32(q->head, &q->regs->cpu_idx);
}
else
mt76_dma_sync_idx(dev, q);
spin_unlock_bh(&q->lock);
}
@@ -277,6 +284,20 @@ mt76_dma_rx_cleanup(struct mt76_dev *dev, struct mt76_queue *q)
spin_unlock_bh(&q->lock);
}
static void
mt76_dma_rx_reset(struct mt76_dev *dev, enum mt76_rxq_id qid)
{
struct mt76_queue *q = &dev->q_rx[qid];
int i;
for (i = 0; i < q->ndesc; i++)
q->desc[i].ctrl &= ~cpu_to_le32(MT_DMA_CTL_DMA_DONE);
mt76_dma_rx_cleanup(dev, q);
mt76_dma_sync_idx(dev, q);
mt76_dma_rx_fill(dev, q, false);
}
static void
mt76_add_fragment(struct mt76_dev *dev, struct mt76_queue *q, void *data,
int len, bool more)
@@ -390,6 +411,7 @@ static const struct mt76_queue_ops mt76_dma_ops = {
.alloc = mt76_dma_alloc_queue,
.add_buf = mt76_dma_add_buf,
.tx_cleanup = mt76_dma_tx_cleanup,
.rx_reset = mt76_dma_rx_reset,
.kick = mt76_dma_kick_queue,
};