static int ccio_proc_info()

in ccio-dma.c [1033:1097]

• 51 lines of code
• 6 McCabe index (conditional complexity)

static int ccio_proc_info(struct seq_file *m, void *p)
{
	struct ioc *ioc = ioc_list;

	while (ioc != NULL) {
		unsigned int total_pages = ioc->res_size << 3;
#ifdef CCIO_COLLECT_STATS
		unsigned long avg = 0, min, max;
		int j;
#endif

		seq_printf(m, "%s\n", ioc->name);
		
		seq_printf(m, "Cujo 2.0 bug    : %s\n",
			   (ioc->cujo20_bug ? "yes" : "no"));
		
		seq_printf(m, "IO PDIR size    : %d bytes (%d entries)\n",
			   total_pages * 8, total_pages);

#ifdef CCIO_COLLECT_STATS
		seq_printf(m, "IO PDIR entries : %ld free  %ld used (%d%%)\n",
			   total_pages - ioc->used_pages, ioc->used_pages,
			   (int)(ioc->used_pages * 100 / total_pages));
#endif

		seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n",
			   ioc->res_size, total_pages);

#ifdef CCIO_COLLECT_STATS
		min = max = ioc->avg_search[0];
		for(j = 0; j < CCIO_SEARCH_SAMPLE; ++j) {
			avg += ioc->avg_search[j];
			if(ioc->avg_search[j] > max) 
				max = ioc->avg_search[j];
			if(ioc->avg_search[j] < min) 
				min = ioc->avg_search[j];
		}
		avg /= CCIO_SEARCH_SAMPLE;
		seq_printf(m, "  Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
			   min, avg, max);

		seq_printf(m, "pci_map_single(): %8ld calls  %8ld pages (avg %d/1000)\n",
			   ioc->msingle_calls, ioc->msingle_pages,
			   (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls));

		/* KLUGE - unmap_sg calls unmap_page for each mapped page */
		min = ioc->usingle_calls - ioc->usg_calls;
		max = ioc->usingle_pages - ioc->usg_pages;
		seq_printf(m, "pci_unmap_single: %8ld calls  %8ld pages (avg %d/1000)\n",
			   min, max, (int)((max * 1000)/min));

		seq_printf(m, "pci_map_sg()    : %8ld calls  %8ld pages (avg %d/1000)\n",
			   ioc->msg_calls, ioc->msg_pages,
			   (int)((ioc->msg_pages * 1000)/ioc->msg_calls));

		seq_printf(m, "pci_unmap_sg()  : %8ld calls  %8ld pages (avg %d/1000)\n\n\n",
			   ioc->usg_calls, ioc->usg_pages,
			   (int)((ioc->usg_pages * 1000)/ioc->usg_calls));
#endif	/* CCIO_COLLECT_STATS */

		ioc = ioc->next;
	}

	return 0;
}