compat/freebsd_network/bus_dma.cpp

197 _prepare_bounce_buffer(bus_dmamap_t map, bus_size_t reqsize, int flags)
199 	if (map->buffer_type == bus_dmamap::BUFFER_PROHIBITED) {
203 	if (map->buffer_type != bus_dmamap::BUFFER_NONE) {
208 	if (map->bounce_buffer_size >= reqsize)
211 	if (map->bounce_buffer != NULL) {
212 		kernel_contigfree(map->bounce_buffer, map->bounce_buffer_size, 0);
213 		map->bounce_buffer = NULL;
217 	int error = bus_dmamem_alloc(map->dmat, &map->bounce_buffer, flags, &extraMap);
220 	map->bounce_buffer_size = map->dmat->maxsize;
221 	bus_dmamap_destroy(map->dmat, extraMap);
228 bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
230 	if (map == NULL)
232 	if (map->buffer_type > bus_dmamap::BUFFER_PROHIBITED)
235 	atomic_add(&map->dmat->map_count, -1);
236 	kernel_contigfree(map->bounce_buffer, map->bounce_buffer_size, M_DEVBUF);
237 	free(map->segments);
238 	free(map);
310 bus_dmamem_free(bus_dma_tag_t dmat, void* vaddr, bus_dmamap_t map)
313 	bus_dmamap_destroy(dmat, map);
386 bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
397 		lastaddr, map->segments, seg, true);
401 		error = _prepare_bounce_buffer(map, buflen, flags);
405 		map->buffer_type = bus_dmamap::BUFFER_TYPE_SIMPLE;
406 		map->buffer = buf;
407 		map->buffer_length = buflen;
410 		error = _bus_load_buffer(dmat, map->bounce_buffer, buflen, flags,
411 			lastaddr, map->segments, seg, true);
415 		(*callback)(callback_arg, map->segments, 0, error);
417 		(*callback)(callback_arg, map->segments, seg + 1, 0);
427 bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf* mb,
451 		error = _prepare_bounce_buffer(map, mb->m_pkthdr.len, flags);
455 		map->buffer_type = bus_dmamap::BUFFER_TYPE_MBUF;
456 		map->mbuf = mb;
459 		error = _bus_load_buffer(dmat, map->bounce_buffer, mb->m_pkthdr.len, flags,
469 bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf* mb,
473 	error = bus_dmamap_load_mbuf_sg(dmat, map, mb, map->segments, &nsegs, flags);
476 		(*callback)(callback_arg, map->segments, 0, 0, error);
478 		(*callback)(callback_arg, map->segments, nsegs, mb->m_pkthdr.len,
486 bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
488 	if (map == NULL)
491 	if (map->buffer_type != bus_dmamap::BUFFER_PROHIBITED)
492 		map->buffer_type = bus_dmamap::BUFFER_NONE;
493 	map->buffer = NULL;
498 bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
500 	if (map == NULL)
504 	switch (map->buffer_type) {
511 			length = map->buffer_length;
515 			length = map->mbuf->m_pkthdr.len;
522 	bus_dmamap_sync_etc(dmat, map, 0, length, op);
527 bus_dmamap_sync_etc(bus_dma_tag_t dmat, bus_dmamap_t map,
530 	if (map == NULL)
535 		switch (map->buffer_type) {
542 				KASSERT((offset + length) <= map->buffer_length, ("mis-sized sync"));
543 				memcpy((caddr_t)map->bounce_buffer + offset,
544 					(caddr_t)map->buffer + offset, length);
548 				m_copydata(map->mbuf, offset, length,
549 					(caddr_t)map->bounce_buffer + offset);
563 		switch (map->buffer_type) {
570 				KASSERT((offset + length) <= map->buffer_length, ("mis-sized sync"));
571 				memcpy((caddr_t)map->buffer + offset,
572 					(caddr_t)map->bounce_buffer + offset, length);
576 				m_copyback(map->mbuf, offset, length,
577 					(caddr_t)map->bounce_buffer + offset);