arm/arm/busdma_machdep-v4.c

402 	bus_dma_tag_t newtag;
407 	newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_BUSDMA, M_NOWAIT);
408 	if (newtag == NULL) {
410 		    __func__, newtag, 0, error);
414 	newtag->parent = parent;
415 	newtag->alignment = alignment ? alignment : 1;
416 	newtag->boundary = boundary;
417 	newtag->lowaddr = trunc_page((vm_offset_t)lowaddr) + (PAGE_SIZE - 1);
418 	newtag->highaddr = trunc_page((vm_offset_t)highaddr) + (PAGE_SIZE - 1);
419 	newtag->filter = filter;
420 	newtag->filterarg = filterarg;
421 	newtag->maxsize = maxsize;
422 	newtag->nsegments = nsegments;
423 	newtag->maxsegsz = maxsegsz;
424 	newtag->flags = flags;
425 	newtag->ref_count = 1; /* Count ourself */
426 	newtag->map_count = 0;
427 	newtag->ranges = bus_dma_get_range();
428 	newtag->_nranges = bus_dma_get_range_nb();
430 		newtag->lockfunc = lockfunc;
431 		newtag->lockfuncarg = lockfuncarg;
433 		newtag->lockfunc = dflt_lock;
434 		newtag->lockfuncarg = NULL;
439 		newtag->lowaddr = MIN(parent->lowaddr, newtag->lowaddr);
440 		newtag->highaddr = MAX(parent->highaddr, newtag->highaddr);
441 		if (newtag->boundary == 0)
442 			newtag->boundary = parent->boundary;
444 			newtag->boundary = MIN(parent->boundary,
445 					       newtag->boundary);
446 		if ((newtag->filter != NULL) ||
448 			newtag->flags |= BUS_DMA_COULD_BOUNCE;
449 		if (newtag->filter == NULL) {
454 			newtag->filter = parent->filter;
455 			newtag->filterarg = parent->filterarg;
456 			newtag->parent = parent->parent;
458 		if (newtag->parent != NULL)
461 	if (_bus_dma_can_bounce(newtag->lowaddr, newtag->highaddr)
462 	 || newtag->alignment > 1)
463 		newtag->flags |= BUS_DMA_COULD_BOUNCE;
465 	if (((newtag->flags & BUS_DMA_COULD_BOUNCE) != 0) &&
471 		if ((error = alloc_bounce_zone(newtag)) != 0) {
472 			free(newtag, M_BUSDMA);
475 		bz = newtag->bounce_zone;
483 			if (alloc_bounce_pages(newtag, pages) < pages)
487 		newtag->flags |= BUS_DMA_MIN_ALLOC_COMP;
489 		newtag->bounce_zone = NULL;
492 		free(newtag, M_BUSDMA);
495 		*dmat = newtag;
498 	    __func__, newtag, (newtag != NULL ? newtag->flags : 0), error);