ATA_PRD_TBL_SZ
dmam_alloc_coherent(ap->host->dev, ATA_PRD_TBL_SZ,
pp->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ * ATA_MAX_QUEUE,
iowrite32(pp->prd_dma + ATA_PRD_TBL_SZ * qc->hw_tag,