TXDMA_DESC_NEXT_INDEX
uint32_t blst = TXDMA_DESC_NEXT_INDEX(i, -1,
i = TXDMA_DESC_NEXT_INDEX(i, 1,
i = TXDMA_DESC_NEXT_INDEX(i, 1, tx_ring_p->tx_wrap_mask);
cur_index = TXDMA_DESC_NEXT_INDEX(cur_index, 1,
cur_index = TXDMA_DESC_NEXT_INDEX(cur_index, 1,
TXDMA_DESC_NEXT_INDEX(i, -1,
i = TXDMA_DESC_NEXT_INDEX(i, 1,
i = TXDMA_DESC_NEXT_INDEX(i, 1, tx_ring_p->tx_wrap_mask);