x86/x86/busdma_bounce.c

120 	   "Total bounce pages");
166 		int pages;
168 		pages = atop(dmat->common.maxsize) - bz->total_bpages;
170 		/* Add pages to our bounce pool */
171 		if (alloc_bounce_pages(dmat, pages) < pages)
240  * bounce pages.
299 	int error, maxpages, pages;
339 		 * Attempt to add pages to our pool on a per-instance
349 			pages = MAX(atop(dmat->common.maxsize), 1);
350 			pages = MIN(maxpages - bz->total_bpages, pages);
351 			pages = MAX(pages, 1);
352 			if (alloc_bounce_pages(dmat, pages) < pages)
439 	 * else allocate non-contiguous pages if...
445 	 * else allocate a block of contiguous pages because one or more of the
522 	 * Count the number of bounce pages needed in order to
573 		 * Count the number of bounce pages
613 		 * Count the number of bounce pages
892 			 * Check if two pages of the user provided buffer
1008 			 * over two pages.
1049 			 * over two pages.
1074 	mtx_init(&bounce_lock, "bounce pages lock", NULL, MTX_DEF);
1137 	    "Total bounce pages");
1141 	    "Free bounce pages");
1145 	    "Reserved bounce pages");
1149 	    "Active bounce pages");
1212 	int pages;
1216 	pages = MIN(bz->free_bpages, map->pagesneeded - map->pagesreserved);
1217 	if (commit == 0 && map->pagesneeded > (map->pagesreserved + pages))
1218 		return (map->pagesneeded - (map->pagesreserved + pages));
1219 	bz->free_bpages -= pages;
1220 	bz->reserved_bpages += pages;
1221 	map->pagesreserved += pages;
1222 	pages = map->pagesneeded - map->pagesreserved;
1224 	return (pages);
1240 		panic("add_bounce_page: map doesn't need any pages");
1244 		panic("add_bounce_page: map doesn't need any pages");
1262 	("Trying to bounce multiple pages with BUS_DMA_KEEP_PG_OFFSET"));