dma_iova_sync
error = dma_iova_sync(dma_dev, state, 0, mapped);
ret = dma_iova_sync(attach->dev, dma->state, 0, mapped_len);
ret = dma_iova_sync(dma_dev, &ctx->iova.state, 0, mapped_len);
EXPORT_SYMBOL_GPL(dma_iova_sync);
err = dma_iova_sync(mdev->device, state, 0, mapped);
int dma_iova_sync(struct device *dev, struct dma_iova_state *state,
ret = dma_iova_sync(dev, state, offset, map->dma_entry_size);