qdma_to_pdma
itxd_pdma = qdma_to_pdma(ring, itxd);
txd_pdma = qdma_to_pdma(ring, txd);
txd_pdma = qdma_to_pdma(ring, txd);
itxd_pdma = qdma_to_pdma(ring, itxd);
txd_pdma = qdma_to_pdma(ring, txd);
struct mtk_tx_dma *txd_pdma = qdma_to_pdma(ring, txd);
struct mtk_tx_dma *txd_pdma = qdma_to_pdma(ring, htxd);