RX_FL_ESIZE
len = fl->qsize * RX_FL_ESIZE;
fl->cap = (fl->qsize - sc->sge.stat_len / RX_FL_ESIZE) * 8;
(void) ddi_dma_sync(fl->dhdl, desc_start * RX_FL_ESIZE, 0,
RX_FL_ESIZE, DDI_DMA_SYNC_FORDEV);
(void) ddi_dma_sync(fl->dhdl, desc_start * RX_FL_ESIZE,
ndesc * RX_FL_ESIZE, DDI_DMA_SYNC_FORDEV);