static int foo(void)
{
	const char * dmac_id =STM_DMAC_ID;
	const char * hb_cap_channel = STM_DMA_CAP_HIGH_BW;
	unsigned long xfer_bytes =4096;
	void * src_buff = (void*)kmalloc(xfer_bytes,GFP_KERNEL);
	void * dst_buff = (void*)kmalloc(xfer_bytes,GFP_KERNEL);
	struct stm_dma_params dmap0;
	int ch_num = request_dma_bycap(&dmac_id,&hb_cap_channel,__FUNCTION__);	
	if(ch_num == -ENODEV){
		printk(" No DMA channel or DMAC available\n");
		return -ENODEV;
	}
	printk("%s IN ch %d\n",__FUNCTION__,ch_num);
	
	
	
	declare_dma_parms(
				&dmap0,
				MODE_FREERUNNING,
				STM_DMA_LIST_OPEN,
				STM_DMA_SETUP_CONTEXT_TASK,
				STM_DMA_NOBLOCK_MODE,
				STM_DMAC_ID);

	if(src_buff && dst_buff){	
		memset(src_buff,0x4,xfer_bytes);
		flush_cache_all();
	}
	
	dma_parms_addrs(&dmap0,
		virt_to_phys(src_buff),
		virt_to_phys(dst_buff),
		(unsigned long)xfer_bytes);

	dma_parms_comp_cb(&dmap0,report_on_node_complete,NULL,0);
	
	dma_parms_DIM_1_x_1(&dmap0,xfer_bytes);
	dma_compile_list(&dmap0);
	dma_xfer_list(ch_num,&dmap0);
	dma_wait_for_completion(ch_num);
	printk(" RECIEVED WAKE UP FROM DMA_API modifying for next transfer\n");		
	
	
	kfree(src_buff);

	src_buff = (void*)kmalloc(xfer_bytes,GFP_KERNEL);

	memset(src_buff,0x1,xfer_bytes);

	dma_parms_addrs(&dmap0,
			virt_to_phys(src_buff),
			virt_to_phys(dst_buff),
			xfer_bytes);
	
	dma_parms_DIM_1_x_1(&dmap0,xfer_bytes);
	
	dma_parms_comp_cb(&dmap0,report_on_node_complete_alt,NULL,0);
	
	dma_compile_list(&dmap0);

	dma_xfer_list(ch_num,&dmap0);

	dma_wait_for_completion(ch_num);

	printk(" RECIEVED WAKE UP FROM DMA_API modified  transfer\n");		
	free_dma(ch_num);

	dma_free_descriptor(&dmap0);

	kfree(src_buff);

	kfree(dst_buff);

	return 0;

}