DMA_DBSB
p->dbs[0] = readl_relaxed(p->base + DMA_DBSB);
p->dbs[1] = readl_relaxed(p->base + DMA_DBSB);
writel_relaxed(p->dbs[1], p->base + DMA_DBSB);
dbsx = DMA_DBSB;
'A' + (dbsx == DMA_DBSB), sg->addr,
readl_relaxed(p->base + DMA_DBSB),
reg = DMA_DBSB;