-int qce_countsg(struct scatterlist *sg_list, int nbytes, bool *chained);
-void qce_unmapsg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction dir, bool chained);
-int qce_mapsg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction dir, bool chained);