mips/mips/busdma_machdep.c

368 	bus_dma_tag_t newtag;
375 	newtag = (bus_dma_tag_t)malloc(sizeof(*newtag), M_BUSDMA, M_NOWAIT);
376 	if (newtag == NULL) {
378 		    __func__, newtag, 0, error);
382 	newtag->parent = parent;
383 	newtag->alignment = alignment;
384 	newtag->boundary = boundary;
385 	newtag->lowaddr = trunc_page((vm_offset_t)lowaddr) + (PAGE_SIZE - 1);
386 	newtag->highaddr = trunc_page((vm_offset_t)highaddr) + (PAGE_SIZE - 1);
387 	newtag->filter = filter;
388 	newtag->filterarg = filterarg;
389 	newtag->maxsize = maxsize;
390 	newtag->nsegments = nsegments;
391 	newtag->maxsegsz = maxsegsz;
392 	newtag->flags = flags;
394 		newtag->flags |= BUS_DMA_COHERENT;
395 	newtag->ref_count = 1; /* Count ourself */
396 	newtag->map_count = 0;
398 		newtag->lockfunc = lockfunc;
399 		newtag->lockfuncarg = lockfuncarg;
401 		newtag->lockfunc = dflt_lock;
402 		newtag->lockfuncarg = NULL;
404 	newtag->segments = NULL;
410 		newtag->lowaddr = MIN(parent->lowaddr, newtag->lowaddr);
411 		newtag->highaddr = MAX(parent->highaddr, newtag->highaddr);
412 		if (newtag->boundary == 0)
413 			newtag->boundary = parent->boundary;
415 			newtag->boundary =
416 			    MIN(parent->boundary, newtag->boundary);
417 		if ((newtag->filter != NULL) ||
419 			newtag->flags |= BUS_DMA_COULD_BOUNCE;
420 		if (newtag->filter == NULL) {
425 			newtag->filter = parent->filter;
426 			newtag->filterarg = parent->filterarg;
427 			newtag->parent = parent->parent;
429 		if (newtag->parent != NULL)
432 	if (_bus_dma_can_bounce(newtag->lowaddr, newtag->highaddr)
433 	 || newtag->alignment > 1)
434 		newtag->flags |= BUS_DMA_COULD_BOUNCE;
436 	if (((newtag->flags & BUS_DMA_COULD_BOUNCE) != 0) &&
442 		if ((error = alloc_bounce_zone(newtag)) != 0) {
443 			free(newtag, M_BUSDMA);
446 		bz = newtag->bounce_zone;
454 			if (alloc_bounce_pages(newtag, pages) < pages)
458 		newtag->flags |= BUS_DMA_MIN_ALLOC_COMP;
460 		newtag->bounce_zone = NULL;
462 		free(newtag, M_BUSDMA);
464 		*dmat = newtag;
466 	    __func__, newtag, (newtag != NULL ? newtag->flags : 0), error);